Project import
diff --git a/lwip.url b/lwip.url
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--- /dev/null
+++ b/lwip.url
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+git://git.savannah.nongnu.org/lwip.git
diff --git a/lwip.version b/lwip.version
new file mode 100644
index 0000000..666b720
--- /dev/null
+++ b/lwip.version
@@ -0,0 +1 @@
+bbf5a08d8e400d6c7adaba38f238f020c9888abf
diff --git a/lwip/CHANGELOG b/lwip/CHANGELOG
new file mode 100644
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--- /dev/null
+++ b/lwip/CHANGELOG
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+HISTORY
+
+(CVS HEAD)
+
+ * [Enter new changes just after this line - do not remove this line]
+
+ ++ New features:
+
+ 2012-03-25: Simon Goldschmidt (idea by Mason)
+ * posix/*: added posix-compatibility include files posix/netdb.h and posix/sys/socket.h
+ which are a simple wrapper to the correct lwIP include files.
+
+ 2012-01-16: Simon Goldschmidt
+ * opt.h, icmp.c: Added option CHECKSUM_GEN_ICMP
+
+ 2011-12-17: Simon Goldschmidt
+ * ip.h: implemented API functions to access so_options of IP pcbs (UDP, TCP, RAW)
+ (fixes bug #35061)
+
+ 2011-09-27: Simon Goldschmidt
+ * opt.h, tcp.c, tcp_in.c: Implemented limiting data on ooseq queue (task #9989)
+ (define TCP_OOSEQ_MAX_BYTES / TCP_OOSEQ_MAX_PBUFS in lwipopts.h)
+
+ 2011-09-21: Simon Goldschmidt
+ * opt.h, api.h, api_lib.c, api_msg.h/.c, sockets.c: Implemented timeout on
+ send (TCP only, bug #33820)
+
+ 2011-09-21: Simon Goldschmidt
+ * init.c: Converted runtime-sanity-checks into compile-time checks that can
+ be disabled (since runtime checks can often not be seen on embedded targets)
+
+ 2011-09-11: Simon Goldschmidt
+ * ppp.h, ppp_impl.h: splitted ppp.h to an internal and external header file
+ to get a clear separation of which functions an application or port may use
+ (task #11281)
+
+ 2011-09-11: Simon Goldschmidt
+ * opt.h, tcp_impl.h, tcp.c, udp.h/.c: Added a config option to randomize
+ initial local TCP/UDP ports (so that different port ranges are used after
+ a reboot; bug #33818; this one added tcp_init/udp_init functions again)
+
+ 2011-09-03: Simon Goldschmidt
+ * dhcp.c: DHCP uses LWIP_RAND() for xid's (bug #30302)
+
+ 2011-08-24: Simon Goldschmidt
+ * opt.h, netif.h/.c: added netif remove callback (bug #32397)
+
+ 2011-07-26: Simon Goldschmidt
+ * etharp.c: ETHARP_SUPPORT_VLAN: add support for an external VLAN filter
+ function instead of only checking for one VLAN (define ETHARP_VLAN_CHECK_FN)
+
+ 2011-07-21: Simon Goldschmidt (patch by hanhui)
+ * ip4.c, etharp.c, pbuf.h: bug #33634 ip_forward() have a faulty behaviour:
+ Added pbuf flags to mark incoming packets as link-layer broadcast/multicast.
+ Also added code to allow ip_forward() to forward non-broadcast packets to
+ the input netif (set IP_FORWARD_ALLOW_TX_ON_RX_NETIF==1).
+
+ 2011-07-21: Simon Goldschmidt
+ * sockets.c, opt.h: (bug #30185): added LWIP_FIONREAD_LINUXMODE that makes
+ ioctl/FIONREAD return the size of the next pending datagram.
+
+ 2011-06-26: Simon Goldschmidt (patch by Cameron Gutman)
+ * tcp.c, tcp_out.c: bug #33604: added some more asserts to check that
+ pcb->state != LISTEN
+
+ 2011-05-25: Simon Goldschmidt
+ * again nearly the whole stack, renamed ip.c to ip4.c, ip_addr.c to ip4_addr.c,
+ combined ipv4/ipv6 inet_chksum.c, added ip.h, ip_addr.h: Combined IPv4
+ and IPv6 code where possible, added defines to access IPv4/IPv6 in non-IP
+ code so that the code is more readable.
+
+ 2011-05-17: Patch by Ivan Delamer (only checked in by Simon Goldschmidt)
+ * nearly the whole stack: Finally, we got decent IPv6 support, big thanks to
+ Ivan! (this is work in progress: we're just post release anyway :-)
+
+ 2011-05-14: Simon Goldschmidt (patch by Stéphane Lesage)
+ * tcpip.c/.h: patch #7449 allow tcpip callback from interrupt with static
+ memory message
+
+
+ ++ Bugfixes:
+
+ 2012-09-26: Simon Goldschmidt
+ * api_msg.c: fixed bug #37405 'err_tcp()' uses already freed 'netconn' object
+
+ 2012-09-26: patch by Henrik Persson
+ * dhcp.c: patch #7843 Fix corner case with dhcp timeouts
+
+ 2012-09-26: patch by Henrik Persson
+ * dhcp.c: patch #7840 Segfault in dhcp_parse_reply if no end marker in dhcp packet
+
+ 2012-08-22: Simon Goldschmidt
+ * memp.c: fixed bug #37166: memp_sanity check loops itself
+
+ 2012-08-13: Simon Goldschmidt
+ * dhcp.c: fixed bug #36645: Calling dhcp_release before dhcp_start
+ dereferences NULL
+
+ 2012-08-13: Simon Goldschmidt
+ * msg_out.c: fixed bug #36840 snmp_send_trap() NULL de-reference if traps
+ configured but no interfaces available
+
+ 2012-08-13: Simon Goldschmidt
+ * dns.c: fixed bug #36899 DNS TTL 0 is cached for a long time
+
+ 2012-05-11: Simon Goldschmidt (patch by Marty)
+ * memp.c: fixed bug #36412: memp.c does not compile when
+ MEMP_OVERFLOW_CHECK > zero and MEMP_SEPARATE_POOLS == 1
+
+ 2012-05-08: Simon Goldschmidt
+ * tcp_out.c: fixed bug #36380: unsent_oversize mismatch in 1.4.1RC1 (this was
+ a debug-check issue only)
+
+ 2012-05-03: Simon Goldschmidt (patch by Sylvain Rochet)
+ * ppp.c: fixed bug #36283 (PPP struct used on header size computation and
+ not packed)
+
+ 2012-05-03: Simon Goldschmidt (patch by David Empson)
+ * ppp.c: fixed bug #36388 (PPP: checksum-only in last pbuf leads to pbuf with
+ zero length)
+
+ 2012-03-27: Simon Goldschmidt
+ * vj.c: fixed bug #35756 header length calculation problem in ppp/vj.c
+
+ 2012-03-27: Simon Goldschmidt (patch by Mason)
+ * tcp_out.c: fixed bug #35945: SYN packet should provide the recv MSS not the
+ send MSS
+
+ 2012-03-25: Simon Goldschmidt
+ * api_msg.c: Fixed bug #35817: do_connect() invalidly signals op_completed
+ for UDP/RAW with LWIP_TCPIP_CORE_LOCKING==1
+
+ 2012-03-25: Simon Goldschmidt
+ * api_msg.h, api_lib.c, api_msg.c, netifapi.c: fixed bug #35931: Name space
+ pollution in api_msg.c and netifapi.c
+
+ 2012-03-22: Simon Goldschmidt
+ * ip4.c: fixed bug #35927: missing refragmentaion in ip_forward
+
+ 2012-03-20: Simon Goldschmidt (patch by Mason)
+ * netdb.c: fixed bug #35907: lwip_gethostbyname_r returns an invalid h_addr_list
+
+ 2012-03-12: Simon Goldschmidt (patch by Bostjan Meglic)
+ * ppp.c: fixed bug #35809: PPP GetMask(): Compiler warning on big endian,
+ possible bug on little endian system
+
+ 2012-02-23: Simon Goldschmidt
+ * etharp.c: fixed bug #35595: Impossible to send broadcast without a gateway
+ (introduced when fixing bug# 33551)
+
+ 2012-02-16: Simon Goldschmidt
+ * ppp.c: fixed pbuf leak when PPP session is aborted through pppSigHUP()
+ (bug #35541: PPP Memory Leak)
+
+ 2012-02-16: Simon Goldschmidt
+ * etharp.c: fixed bug #35531: Impossible to send multicast without a gateway
+ (introduced when fixing bug# 33551)
+
+ 2012-02-16: Simon Goldschmidt (patch by Stéphane Lesage)
+ * msg_in.c, msg_out.c: fixed bug #35536 SNMP: error too big response is malformed
+
+ 2012-02-15: Simon Goldschmidt
+ * init.c: fixed bug #35537: MEMP_NUM_* sanity checks should be disabled with
+ MEMP_MEM_MALLOC==1
+
+ 2012-02-12: Simon Goldschmidt
+ * tcp.h, tcp_in.c, tcp_out.c: partly fixed bug #25882: TCP hangs on
+ MSS > pcb->snd_wnd (by not creating segments bigger than half the window)
+
+ 2012-02-11: Simon Goldschmidt
+ * tcp.c: fixed bug #35435: No pcb state check before adding it to time-wait
+ queue while closing
+
+ 2012-01-22: Simon Goldschmidt
+ * tcp.c, tcp_in.c: fixed bug #35305: pcb may be freed too early on shutdown(WR)
+
+ 2012-01-21: Simon Goldschmidt
+ * tcp.c: fixed bug #34636: FIN_WAIT_2 - Incorrect shutdown of TCP pcb
+
+ 2012-01-20: Simon Goldschmidt
+ * dhcp.c: fixed bug #35151: DHCP asserts on incoming option lengths
+
+ 2012-01-20: Simon Goldschmidt
+ * pbuf.c: fixed bug #35291: NULL pointer in pbuf_copy
+
+ 2011-11-25: Simon Goldschmidt
+ * tcp.h/.c, tcp_impl.h, tcp_in.c: fixed bug #31177: tcp timers can corrupt
+ tcp_active_pcbs in some cases
+
+ 2011-11-23: Simon Goldschmidt
+ * sys.c: fixed bug #34884: sys_msleep() body needs to be surrounded with
+ '#ifndef sys_msleep'
+
+ 2011-11-22: Simon Goldschmidt
+ * netif.c, etharp.h/.c: fixed bug #34684: Clear the arp table cache when
+ netif is brought down
+
+ 2011-10-28: Simon Goldschmidt
+ * tcp_in.c: fixed bug #34638: Dead code in tcp_receive - pcb->dupacks
+
+ 2011-10-23: Simon Goldschmidt
+ * mem.c: fixed bug #34429: possible memory corruption with
+ LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT set to 1
+
+ 2011-10-18: Simon Goldschmidt
+ * arch.h, netdb.c: fixed bug #34592: lwip_gethostbyname_r uses nonstandard
+ error value
+
+ 2011-10-18: Simon Goldschmidt
+ * opt.h: fixed default values of TCP_SNDLOWAT and TCP_SNDQUEUELOWAT for small
+ windows (bug #34176 select after non-blocking send times out)
+
+ 2011-10-18: Simon Goldschmidt
+ * tcp_impl.h, tcp_out.c: fixed bug #34587: TCP_BUILD_MSS_OPTION doesn't
+ consider netif->mtu, causes slow network
+
+ 2011-10-18: Simon Goldschmidt
+ * sockets.c: fixed bug #34581 missing parentheses in udplite sockets code
+
+ 2011-10-18: Simon Goldschmidt
+ * sockets.h: fixed bug #34580 fcntl() is missing in LWIP_COMPAT_SOCKETS
+
+ 2011-10-17: Simon Goldschmidt
+ * api_msg.c: fixed bug #34569: shutdown(SHUT_WR) crashes netconn/socket api
+
+ 2011-10-13: Simon Goldschmidt
+ * tcp_in.c, tcp_out.c: fixed bug #34517 (persist timer is started although no
+ zero window is received) by starting the persist timer when a zero window is
+ received, not when we have more data queued for sending than fits into the
+ window
+
+ 2011-10-13: Simon Goldschmidt
+ * def.h, timers.c: fixed bug #34541: LWIP_U32_DIFF is unnecessarily complex
+
+ 2011-10-13: Simon Goldschmidt
+ * sockets.c, api_lib.c: fixed bug #34540: compiler error when CORE_LOCKING is
+ used and not all protocols are enabled
+
+ 2011-10-12: Simon Goldschmidt
+ * pbuf.c: fixed bug #34534: Error in sending fragmented IP if MEM_ALIGNMENT > 4
+
+ 2011-10-09: Simon Goldschmidt
+ * tcp_out.c: fixed bug #34426: tcp_zero_window_probe() transmits incorrect
+ byte value when pcb->unacked != NULL
+
+ 2011-10-09: Simon Goldschmidt
+ * ip4.c: fixed bug #34447 LWIP_IP_ACCEPT_UDP_PORT(dst_port) wrong
+
+ 2011-09-27: Simon Goldschmidt
+ * tcp_in.c, tcp_out.c: Reset pcb->unsent_oversize in 2 more places...
+
+ 2011-09-27: Simon Goldschmidt
+ * tcp_in.c: fixed bug #28288: Data after FIN in oos queue
+
+ 2011-09-27: Simon Goldschmidt
+ * dhcp.c: fixed bug #34406 dhcp_option_hostname() can overflow the pbuf
+
+ 2011-09-24: Simon Goldschmidt
+ * mem.h: fixed bug #34377 MEM_SIZE_F is not defined if MEM_LIBC_MALLOC==1
+
+ 2011-09-23: Simon Goldschmidt
+ * pbuf.h, tcp.c, tcp_in.c: fixed bug #33871: rejecting TCP_EVENT_RECV() for
+ the last packet including FIN can lose data
+
+ 2011-09-22: Simon Goldschmidt
+ * tcp_impl.h: fixed bug #34355: nagle does not take snd_buf/snd_queuelen into
+ account
+
+ 2011-09-21: Simon Goldschmidt
+ * opt.h: fixed default value of TCP_SND_BUF to not violate the sanity checks
+ in init.c
+
+ 2011-09-20: Simon Goldschmidt
+ * timers.c: fixed bug #34337 (possible NULL pointer in sys_check_timeouts)
+
+ 2011-09-11: Simon Goldschmidt
+ * tcp_out.c: use pcb->mss instead of TCP_MSS for preallocate mss-sized pbufs
+ (bug #34019)
+
+ 2011-09-09: Simon Goldschmidt
+ * udp.c: fixed bug #34072: UDP broadcast is received from wrong UDP pcb if
+ udp port matches
+
+ 2011-09-03: Simon Goldschmidt
+ * tcp_in.c: fixed bug #33952 PUSH flag in incoming packet is lost when packet
+ is aggregated and sent to application
+
+ 2011-09-01: Simon Goldschmidt
+ * opt.h: fixed bug #31809 LWIP_EVENT_API in opts.h is inconsistent compared
+ to other options
+
+ 2011-09-01: Simon Goldschmidt
+ * tcp_in.c: fixed bug #34111 RST for ACK to listening pcb has wrong seqno
+
+ 2011-08-24: Simon Goldschmidt
+ * inet6.h: fixed bug #34124 struct in6_addr does not conform to the standard
+
+ 2011-08-24: Simon Goldschmidt
+ * api_msg.c, sockets.c: fixed bug #33956 Wrong error returned when calling
+ accept() on UDP connections
+
+ 2011-08-24: Simon Goldschmidt
+ * sockets.h: fixed bug #34057 socklen_t should be a typedef
+
+ 2011-08-24: Simon Goldschmidt
+ * pbuf.c: fixed bug #34112 Odd check in pbuf_alloced_custom (typo)
+
+ 2011-08-24: Simon Goldschmidt
+ * dhcp.c: fixed bug #34122 dhcp: hostname can overflow
+
+ 2011-08-24: Simon Goldschmidt
+ * netif.c: fixed bug #34121 netif_add/netif_set_ipaddr fail on NULL ipaddr
+
+ 2011-08-22: Simon Goldschmidt
+ * tcp_out.c: fixed bug #33962 TF_FIN not always set after FIN is sent. (This
+ merely prevents nagle from not transmitting fast after closing.)
+
+ 2011-07-22: Simon Goldschmidt
+ * api_lib.c, api_msg.c, sockets.c, api.h: fixed bug #31084 (socket API returns
+ always EMSGSIZE on non-blocking sockets if data size > send buffers) -> now
+ lwip_send() sends as much as possible for non-blocking sockets
+
+ 2011-07-22: Simon Goldschmidt
+ * pbuf.c/.h, timers.c: freeing ooseq pbufs when the pbuf pool is empty implemented
+ for NO_SYS==1: when not using sys_check_timeouts(), call PBUF_CHECK_FREE_OOSEQ()
+ at regular intervals from main level.
+
+ 2011-07-21: Simon Goldschmidt
+ * etharp.c: fixed bug #33551 (ARP entries may time out although in use) by
+ sending an ARP request when an ARP entry is used in the last minute before
+ it would time out.
+
+ 2011-07-04: Simon Goldschmidt
+ * sys_arch.txt: Fixed documentation after changing sys arch prototypes for 1.4.0.
+
+ 2011-06-26: Simon Goldschmidt
+ * tcp.c: fixed bug #31723 (tcp_kill_prio() kills pcbs with the same prio) by
+ updating its documentation only.
+
+ 2011-06-26: Simon Goldschmidt
+ * mem.c: fixed bug #33545: With MEM_USE_POOLS==1, mem_malloc can return an
+ unaligned pointer.
+
+ 2011-06-26: Simon Goldschmidt
+ * mem.c: fixed bug #33544 "warning in mem.c in lwip 1.4.0 with NO_SYS=1"
+
+
+
+(STABLE-1.4.0)
+
+ ++ New features:
+
+ 2011-03-27: Simon Goldschmidt
+ * tcp_impl.h, tcp_in.c, tcp_out.c: Removed 'dataptr' from 'struct tcp_seg' and
+ calculate it in tcp_zero_window_probe (the only place where it was used).
+
+ 2010-11-21: Simon Goldschmidt
+ * dhcp.c/.h: Added a function to deallocate the struct dhcp from a netif
+ (fixes bug #31525).
+
+ 2010-07-12: Simon Goldschmidt (patch by Stephane Lesage)
+ * ip.c, udp.c/.h, pbuf.h, sockets.c: task #10495: Added support for
+ IP_MULTICAST_LOOP at socket- and raw-API level.
+
+ 2010-06-16: Simon Goldschmidt
+ * ip.c: Added an optional define (LWIP_IP_ACCEPT_UDP_PORT) that can allow
+ link-layer-addressed UDP traffic to be received while a netif is down (just
+ like DHCP during configuration)
+
+ 2010-05-22: Simon Goldschmidt
+ * many many files: bug #27352: removed packing from ip_addr_t, the packed
+ version is now only used in protocol headers. Added global storage for
+ current src/dest IP address while in input functions.
+
+ 2010-05-16: Simon Goldschmidt
+ * def.h: task #10391: Add preprocessor-macros for compile-time htonl
+ calculation (and use them throughout the stack where applicable)
+
+ 2010-05-16: Simon Goldschmidt
+ * opt.h, memp_std.h, memp.c, ppp_oe.h/.c: PPPoE now uses its own MEMP pool
+ instead of the heap (moved struct pppoe_softc from ppp_oe.c to ppp_oe.h)
+
+ 2010-05-16: Simon Goldschmidt
+ * opt.h, memp_std.h, dns.h/.c: DNS_LOCAL_HOSTLIST_IS_DYNAMIC uses its own
+ MEMP pool instead of the heap
+
+ 2010-05-13: Simon Goldschmidt
+ * tcp.c, udp.c: task #6995: Implement SO_REUSEADDR (correctly), added
+ new option SO_REUSE_RXTOALL to pass received UDP broadcast/multicast
+ packets to more than one pcb.
+
+ 2010-05-02: Simon Goldschmidt
+ * netbuf.h/.c, sockets.c, api_msg.c: use checksum-on-copy for sending
+ UDP data for LWIP_NETIF_TX_SINGLE_PBUF==1
+
+ 2010-04-30: Simon Goldschmidt
+ * udp.h/.c, pbuf.h/.c: task #6849: added udp_send(_to/_if) functions that
+ take a precalculated checksum, added pbuf_fill_chksum() to copy data
+ into a pbuf and at the same time calculating the checksum for that data
+
+ 2010-04-29: Simon Goldschmidt
+ * ip_addr.h, etharp.h/.c, autoip.c: Create overridable macros for copying
+ 2-byte-aligned IP addresses and MAC addresses
+
+ 2010-04-28: Patch by Bill Auerbach
+ * ip.c: Inline generating IP checksum to save a function call
+
+ 2010-04-14: Simon Goldschmidt
+ * tcpip.h/.c, timers.c: Added an overridable define to get informed when the
+ tcpip_thread processes messages or timeouts to implement a watchdog.
+
+ 2010-03-28: Simon Goldschmidt
+ * ip_frag.c: create a new (contiguous) PBUF_RAM for every outgoing
+ fragment if LWIP_NETIF_TX_SINGLE_PBUF==1
+
+ 2010-03-27: Simon Goldschmidt
+ * etharp.c: Speedup TX by moving code from find_entry to etharp_output/
+ etharp_query to prevent unnecessary function calls (inspired by
+ patch #7135).
+
+ 2010-03-20: Simon Goldschmidt
+ * opt.h, tcpip.c/.h: Added an option to disable tcpip_(un)timeout code
+ since the linker cannot do this automatically to save space.
+
+ 2010-03-20: Simon Goldschmidt
+ * opt.h, etharp.c/.h: Added support for static ARP table entries
+
+ 2010-03-14: Simon Goldschmidt
+ * tcp_impl.h, tcp_out.c, inet_chksum.h/.c: task #6849: Calculate checksum
+ when creating TCP segments, not when (re-)transmitting them.
+
+ 2010-03-07: Simon Goldschmidt
+ * sockets.c: bug #28775 (select/event_callback: only check select_cb_list
+ on change) plus use SYS_LIGHTWEIGHT_PROT to protect the select code.
+ This should speed up receiving data on sockets as the select code in
+ event_callback is only executed when select is waiting.
+
+ 2010-03-06: Simon Goldschmidt
+ * tcp_out.c: task #7013 (Create option to have all packets delivered to
+ netif->output in one piece): Always copy to try to create single pbufs
+ in tcp_write.
+
+ 2010-03-06: Simon Goldschmidt
+ * api.h, api_lib.c, sockets.c: task #10167 (sockets: speed up TCP recv
+ by not allocating a netbuf): added function netconn_recv_tcp_pbuf()
+ for tcp netconns to receive pbufs, not netbufs; use that function
+ for tcp sockets.
+
+ 2010-03-05: Jakob Ole Stoklundsen / Simon Goldschmidt
+ * opt.h, tcp.h, tcp_impl.h, tcp.c, tcp_in.c, tcp_out.c: task #7040:
+ Work on tcp_enqueue: Don't waste memory when chaining segments,
+ added option TCP_OVERSIZE to prevent creating many small pbufs when
+ calling tcp_write with many small blocks of data. Instead, pbufs are
+ allocated larger than needed and the space is used for later calls to
+ tcp_write.
+
+ 2010-02-21: Simon Goldschmidt
+ * stats.c/.h: Added const char* name to mem- and memp-stats for easier
+ debugging.
+
+ 2010-02-21: Simon Goldschmidt
+ * tcp.h (and usages), added tcp_impl.h: Splitted API and internal
+ implementation of tcp to make API usage cleare to application programmers
+
+ 2010-02-14: Simon Goldschmidt/Stephane Lesage
+ * ip_addr.h: Improved some defines working on ip addresses, added faster
+ macro to copy addresses that cannot be NULL
+
+ 2010-02-13: Simon Goldschmidt
+ * api.h, api_lib.c, api_msg.c, sockets.c: task #7865 (implement non-
+ blocking send operation)
+
+ 2010-02-12: Simon Goldschmidt
+ * sockets.c/.h: Added a minimal version of posix fctl() to have a
+ standardised way to set O_NONBLOCK for nonblocking sockets.
+
+ 2010-02-12: Simon Goldschmidt
+ * dhcp.c/.h, autoip.c/.h: task #10139 (Prefer statically allocated
+ memory): added autoip_set_struct() and dhcp_set_struct() to let autoip
+ and dhcp work with user-allocated structs instead of callin mem_malloc
+
+ 2010-02-12: Simon Goldschmidt/Jeff Barber
+ * tcp.c/h: patch #6865 (SO_REUSEADDR for TCP): if pcb.so_options has
+ SOF_REUSEADDR set, allow binding to endpoint in TIME_WAIT
+
+ 2010-02-12: Simon Goldschmidt
+ * sys layer: task #10139 (Prefer statically allocated memory): converted
+ mbox and semaphore functions to take pointers to sys_mbox_t/sys_sem_t;
+ converted sys_mbox_new/sys_sem_new to take pointers and return err_t;
+ task #7212: Add Mutex concept in sys_arch (define LWIP_COMPAT_MUTEX
+ to let sys.h use binary semaphores instead of mutexes - as before)
+
+ 2010-02-09: Simon Goldschmidt (Simon Kallweit)
+ * timers.c/.h: Added function sys_restart_timeouts() from patch #7085
+ (Restart system timeout handling)
+
+ 2010-02-09: Simon Goldschmidt
+ * netif.c/.h, removed loopif.c/.h: task #10153 (Integrate loopif into
+ netif.c) - loopif does not have to be created by the port any more,
+ just define LWIP_HAVE_LOOPIF to 1.
+
+ 2010-02-08: Simon Goldschmidt
+ * inet.h, ip_addr.c/.h: Added reentrant versions of inet_ntoa/ipaddr_ntoa
+ inet_ntoa_r/ipaddr_ntoa_r
+
+ 2010-02-08: Simon Goldschmidt
+ * netif.h: Added netif_s/get_igmp_mac_filter() macros
+
+ 2010-02-05: Simon Goldschmidt
+ * netif.h: Added function-like macros to get/set the hostname on a netif
+
+ 2010-02-04: Simon Goldschmidt
+ * nearly every file: Replaced struct ip_addr by typedef ip_addr_t to
+ make changing the actual implementation behind the typedef easier.
+
+ 2010-02-01: Simon Goldschmidt
+ * opt.h, memp_std.h, dns.h, netdb.c, memp.c: Let netdb use a memp pool
+ for allocating memory when getaddrinfo() is called.
+
+ 2010-01-31: Simon Goldschmidt
+ * dhcp.h, dhcp.c: Reworked the code that parses DHCP options: parse
+ them once instead of parsing for every option. This also removes
+ the need for mem_malloc from dhcp_recv and makes it possible to
+ correctly retrieve the BOOTP file.
+
+ 2010-01-30: simon Goldschmidt
+ * sockets.c: Use SYS_LIGHTWEIGHT_PROT instead of a semaphore to protect
+ the sockets array.
+
+ 2010-01-29: Simon Goldschmidt (patch by Laura Garrett)
+ * api.h, api_msg.c, sockets.c: Added except set support in select
+ (patch #6860)
+
+ 2010-01-29: Simon Goldschmidt (patch by Laura Garrett)
+ * api.h, sockets.h, err.h, api_lib.c, api_msg.c, sockets.c, err.c:
+ Add non-blocking support for connect (partly from patch #6860),
+ plus many cleanups in socket & netconn API.
+
+ 2010-01-27: Simon Goldschmidt
+ * opt.h, tcp.h, init.c, api_msg.c: Added TCP_SNDQUEUELOWAT corresponding
+ to TCP_SNDLOWAT and added tcp_sndqueuelen() - this fixes bug #28605
+
+ 2010-01-26: Simon Goldschmidt
+ * snmp: Use memp pools for snmp instead of the heap; added 4 new pools.
+
+ 2010-01-14: Simon Goldschmidt
+ * ppp.c/.h: Fixed bug #27856: PPP: Set netif link- and status-callback
+ by adding ppp_set_netif_statuscallback()/ppp_set_netif_linkcallback()
+
+ 2010-01-13: Simon Goldschmidt
+ * mem.c: The heap now may be moved to user-defined memory by defining
+ LWIP_RAM_HEAP_POINTER as a void pointer to that memory's address
+ (patch #6966 and bug #26133)
+
+ 2010-01-10: Simon Goldschmidt (Bill Auerbach)
+ * opt.h, memp.c: patch #6822 (Add option to place memory pools in
+ separate arrays)
+
+ 2010-01-10: Simon Goldschmidt
+ * init.c, igmp.c: patch #6463 (IGMP - Adding Random Delay): added define
+ LWIP_RAND() for lwip-wide randomization (to be defined in cc.h)
+
+ 2009-12-31: Simon Goldschmidt
+ * tcpip.c, init.c, memp.c, sys.c, memp_std.h, sys.h, tcpip.h
+ added timers.c/.h: Separated timer implementation from semaphore/mbox
+ implementation, moved timer implementation to timers.c/.h, timers are
+ now only called from tcpip_thread or by explicitly checking them.
+ (TASK#7235)
+
+ 2009-12-27: Simon Goldschmidt
+ * opt.h, etharp.h/.c, init.c, tcpip.c: Added an additional option
+ LWIP_ETHERNET to support ethernet without ARP (necessary for pure PPPoE)
+
+
+ ++ Bugfixes:
+
+ 2011-04-20: Simon Goldschmidt
+ * sys_arch.txt: sys_arch_timeouts() is not needed any more.
+
+ 2011-04-13: Simon Goldschmidt
+ * tcp.c, udp.c: Fixed bug #33048 (Bad range for IP source port numbers) by
+ using ports in the IANA private/dynamic range (49152 through 65535).
+
+ 2011-03-29: Simon Goldschmidt, patch by Emil Lhungdahl:
+ * etharp.h/.c: Fixed broken VLAN support.
+
+ 2011-03-27: Simon Goldschmidt
+ * tcp.c: Fixed bug #32926 (TCP_RMV(&tcp_bound_pcbs) is called on unbound tcp
+ pcbs) by checking if the pcb was bound (local_port != 0).
+
+ 2011-03-27: Simon Goldschmidt
+ * ppp.c: Fixed bug #32280 (ppp: a pbuf is freed twice)
+
+ 2011-03-27: Simon Goldschmidt
+ * sockets.c: Fixed bug #32906: lwip_connect+lwip_send did not work for udp and
+ raw pcbs with LWIP_TCPIP_CORE_LOCKING==1.
+
+ 2011-03-27: Simon Goldschmidt
+ * tcp_out.c: Fixed bug #32820 (Outgoing TCP connections created before route
+ is present never times out) by starting retransmission timer before checking
+ route.
+
+ 2011-03-22: Simon Goldschmidt
+ * ppp.c: Fixed bug #32648 (PPP code crashes when terminating a link) by only
+ calling sio_read_abort() if the file descriptor is valid.
+
+ 2011-03-14: Simon Goldschmidt
+ * err.h/.c, sockets.c, api_msg.c: fixed bug #31748 (Calling non-blocking connect
+ more than once can render a socket useless) since it mainly involves changing
+ "FATAL" classification of error codes: ERR_USE and ERR_ISCONN just aren't fatal.
+
+ 2011-03-13: Simon Goldschmidt
+ * sockets.c: fixed bug #32769 (ESHUTDOWN is linux-specific) by fixing
+ err_to_errno_table (ERR_CLSD: ENOTCONN instead of ESHUTDOWN), ERR_ISCONN:
+ use EALRADY instead of -1
+
+ 2011-03-13: Simon Goldschmidt
+ * api_lib.c: netconn_accept: return ERR_ABRT instead of ERR_CLSD if the
+ connection has been aborted by err_tcp (since this is not a normal closing
+ procedure).
+
+ 2011-03-13: Simon Goldschmidt
+ * tcp.c: tcp_bind: return ERR_VAL instead of ERR_ISCONN when trying to bind
+ with pcb->state != CLOSED
+
+ 2011-02-17: Simon Goldschmidt
+ * rawapi.txt: Fixed bug #32561 tcp_poll argument definition out-of-order in
+ documentation
+
+ 2011-02-17: Simon Goldschmidt
+ * many files: Added missing U/UL modifiers to fix 16-bit-arch portability.
+
+ 2011-01-24: Simon Goldschmidt
+ * sockets.c: Fixed bug #31741: lwip_select seems to have threading problems
+
+ 2010-12-02: Simon Goldschmidt
+ * err.h: Fixed ERR_IS_FATAL so that ERR_WOULDBLOCK is not fatal.
+
+ 2010-11-23: Simon Goldschmidt
+ * api.h, api_lib.c, api_msg.c, sockets.c: netconn.recv_avail is only used for
+ LWIP_SO_RCVBUF and ioctl/FIONREAD.
+
+ 2010-11-23: Simon Goldschmidt
+ * etharp.c: Fixed bug #31720: ARP-queueing: RFC 1122 recommends to queue at
+ least 1 packet -> ARP_QUEUEING==0 now queues the most recent packet.
+
+ 2010-11-23: Simon Goldschmidt
+ * tcp_in.c: Fixed bug #30577: tcp_input: don't discard ACK-only packets after
+ refusing 'refused_data' again.
+
+ 2010-11-22: Simon Goldschmidt
+ * sockets.c: Fixed bug #31590: getsockopt(... SO_ERROR ...) gives EINPROGRESS
+ after a successful nonblocking connection.
+
+ 2010-11-22: Simon Goldschmidt
+ * etharp.c: Fixed bug #31722: IP packets sent with an AutoIP source addr
+ must be sent link-local
+
+ 2010-11-22: Simon Goldschmidt
+ * timers.c: patch #7329: tcp_timer_needed prototype was ifdef'ed out for
+ LWIP_TIMERS==0
+
+ 2010-11-20: Simon Goldschmidt
+ * sockets.c: Fixed bug #31170: lwip_setsockopt() does not set socket number
+
+ 2010-11-20: Simon Goldschmidt
+ * sockets.h: Fixed bug #31304: Changed SHUT_RD, SHUT_WR and SHUT_RDWR to
+ resemble other stacks.
+
+ 2010-11-20: Simon Goldschmidt
+ * dns.c: Fixed bug #31535: TCP_SND_QUEUELEN must be at least 2 or else
+ no-copy TCP writes will never succeed.
+
+ 2010-11-20: Simon Goldschmidt
+ * dns.c: Fixed bug #31701: Error return value from dns_gethostbyname() does
+ not match documentation: return ERR_ARG instead of ERR_VAL if not
+ initialized or wrong argument.
+
+ 2010-10-20: Simon Goldschmidt
+ * sockets.h: Fixed bug #31385: sizeof(struct sockaddr) is 30 but should be 16
+
+ 2010-10-05: Simon Goldschmidt
+ * dhcp.c: Once again fixed #30038: DHCP/AutoIP cooperation failed when
+ replugging the network cable after an AutoIP address was assigned.
+
+ 2010-08-10: Simon Goldschmidt
+ * tcp.c: Fixed bug #30728: tcp_new_port() did not check listen pcbs
+
+ 2010-08-03: Simon Goldschmidt
+ * udp.c, raw.c: Don't chain empty pbufs when sending them (fixes bug #30625)
+
+ 2010-08-01: Simon Goldschmidt (patch by Greg Renda)
+ * ppp.c: Applied patch #7264 (PPP protocols are rejected incorrectly on big
+ endian architectures)
+
+ 2010-07-28: Simon Goldschmidt
+ * api_lib.c, api_msg.c, sockets.c, mib2.c: Fixed compilation with TCP or UDP
+ disabled.
+
+ 2010-07-27: Simon Goldschmidt
+ * tcp.c: Fixed bug #30565 (tcp_connect() check bound list): that check did no
+ harm but never did anything
+
+ 2010-07-21: Simon Goldschmidt
+ * ip.c: Fixed invalid fix for bug #30402 (CHECKSUM_GEN_IP_INLINE does not
+ add IP options)
+
+ 2010-07-16: Kieran Mansley
+ * msg_in.c: Fixed SNMP ASN constant defines to not use ! operator
+
+ 2010-07-10: Simon Goldschmidt
+ * ip.c: Fixed bug #30402: CHECKSUM_GEN_IP_INLINE does not add IP options
+
+ 2010-06-30: Simon Goldschmidt
+ * api_msg.c: fixed bug #30300 (shutdown parameter was not initialized in
+ netconn_delete)
+
+ 2010-06-28: Kieran Mansley
+ * timers.c remove unportable printing of C function pointers
+
+ 2010-06-24: Simon Goldschmidt
+ * init.c, timers.c/.h, opt.h, memp_std.h: From patch #7221: added flag
+ NO_SYS_NO_TIMERS to drop timer support for NO_SYS==1 for easier upgrading
+
+ 2010-06-24: Simon Goldschmidt
+ * api(_lib).c/.h, api_msg.c/.h, sockets.c/.h: Fixed bug #10088: Correctly
+ implemented shutdown at socket level.
+
+ 2010-06-21: Simon Goldschmidt
+ * pbuf.c/.h, ip_frag.c/.h, opt.h, memp_std.h: Fixed bug #29361 (ip_frag has
+ problems with zero-copy DMA MACs) by adding custom pbufs and implementing
+ custom pbufs that reference other (original) pbufs. Additionally set
+ IP_FRAG_USES_STATIC_BUF=0 as default to be on the safe side.
+
+ 2010-06-15: Simon Goldschmidt
+ * dhcp.c: Fixed bug #29970: DHCP endian issue parsing option responses
+
+ 2010-06-14: Simon Goldschmidt
+ * autoip.c: Fixed bug #30039: AutoIP does not reuse previous addresses
+
+ 2010-06-12: Simon Goldschmidt
+ * dhcp.c: Fixed bug #30038: dhcp_network_changed doesn't reset AUTOIP coop
+ state
+
+ 2010-05-17: Simon Goldschmidt
+ * netdb.c: Correctly NULL-terminate h_addr_list
+
+ 2010-05-16: Simon Goldschmidt
+ * def.h/.c: changed the semantics of LWIP_PREFIX_BYTEORDER_FUNCS to prevent
+ "symbol already defined" i.e. when linking to winsock
+
+ 2010-05-05: Simon Goldschmidt
+ * def.h, timers.c: Fixed bug #29769 (sys_check_timeouts: sys_now() may
+ overflow)
+
+ 2010-04-21: Simon Goldschmidt
+ * api_msg.c: Fixed bug #29617 (sometime cause stall on delete listening
+ connection)
+
+ 2010-03-28: Luca Ceresoli
+ * ip_addr.c/.h: patch #7143: Add a few missing const qualifiers
+
+ 2010-03-27: Luca Ceresoli
+ * mib2.c: patch #7130: remove meaningless const qualifiers
+
+ 2010-03-26: Simon Goldschmidt
+ * tcp_out.c: Make LWIP_NETIF_TX_SINGLE_PBUF work for TCP, too
+
+ 2010-03-26: Simon Goldschmidt
+ * various files: Fixed compiling with different options disabled (TCP/UDP),
+ triggered by bug #29345; don't allocate acceptmbox if LWIP_TCP is disabled
+
+ 2010-03-25: Simon Goldschmidt
+ * sockets.c: Fixed bug #29332: lwip_select() processes readset incorrectly
+
+ 2010-03-25: Simon Goldschmidt
+ * tcp_in.c, test_tcp_oos.c: Fixed bug #29080: Correctly handle remote side
+ overrunning our rcv_wnd in ooseq case.
+
+ 2010-03-22: Simon Goldschmidt
+ * tcp.c: tcp_listen() did not copy the pcb's prio.
+
+ 2010-03-19: Simon Goldschmidt
+ * snmp_msg.c: Fixed bug #29256: SNMP Trap address was not correctly set
+
+ 2010-03-14: Simon Goldschmidt
+ * opt.h, etharp.h: Fixed bug #29148 (Incorrect PBUF_POOL_BUFSIZE for ports
+ where ETH_PAD_SIZE > 0) by moving definition of ETH_PAD_SIZE to opt.h
+ and basing PBUF_LINK_HLEN on it.
+
+ 2010-03-08: Simon Goldschmidt
+ * netif.c, ipv4/ip.c: task #10241 (AutoIP: don't break existing connections
+ when assiging routable address): when checking incoming packets and
+ aborting existing connection on address change, filter out link-local
+ addresses.
+
+ 2010-03-06: Simon Goldschmidt
+ * sockets.c: Fixed LWIP_NETIF_TX_SINGLE_PBUF for LWIP_TCPIP_CORE_LOCKING
+
+ 2010-03-06: Simon Goldschmidt
+ * ipv4/ip.c: Don't try to forward link-local addresses
+
+ 2010-03-06: Simon Goldschmidt
+ * etharp.c: Fixed bug #29087: etharp: don't send packets for LinkLocal-
+ addresses to gw
+
+ 2010-03-05: Simon Goldschmidt
+ * dhcp.c: Fixed bug #29072: Correctly set ciaddr based on message-type
+ and state.
+
+ 2010-03-05: Simon Goldschmidt
+ * api_msg.c: Correctly set TCP_WRITE_FLAG_MORE when netconn_write is split
+ into multiple calls to tcp_write.
+
+ 2010-02-21: Simon Goldschmidt
+ * opt.h, mem.h, dns.c: task #10140: Remove DNS_USES_STATIC_BUF (keep
+ the implementation of DNS_USES_STATIC_BUF==1)
+
+ 2010-02-20: Simon Goldschmidt
+ * tcp.h, tcp.c, tcp_in.c, tcp_out.c: Task #10088: Correctly implement
+ close() vs. shutdown(). Now the application does not get any more
+ recv callbacks after calling tcp_close(). Added tcp_shutdown().
+
+ 2010-02-19: Simon Goldschmidt
+ * mem.c/.h, pbuf.c: Renamed mem_realloc() to mem_trim() to prevent
+ confusion with realloc()
+
+ 2010-02-15: Simon Goldschmidt/Stephane Lesage
+ * netif.c/.h: Link status does not depend on LWIP_NETIF_LINK_CALLBACK
+ (fixes bug #28899)
+
+ 2010-02-14: Simon Goldschmidt
+ * netif.c: Fixed bug #28877 (Duplicate ARP gratuitous packet with
+ LWIP_NETIF_LINK_CALLBACK set on) by only sending if both link- and
+ admin-status of a netif are up
+
+ 2010-02-14: Simon Goldschmidt
+ * opt.h: Disable ETHARP_TRUST_IP_MAC by default since it slows down packet
+ reception and is not really necessary
+
+ 2010-02-14: Simon Goldschmidt
+ * etharp.c/.h: Fixed ARP input processing: only add a new entry if a
+ request was directed as us (RFC 826, Packet Reception), otherwise
+ only update existing entries; internalized some functions
+
+ 2010-02-14: Simon Goldschmidt
+ * netif.h, etharp.c, tcpip.c: Fixed bug #28183 (ARP and TCP/IP cannot be
+ disabled on netif used for PPPoE) by adding a new netif flag
+ (NETIF_FLAG_ETHERNET) that tells the stack the device is an ethernet
+ device but prevents usage of ARP (so that ethernet_input can be used
+ for PPPoE).
+
+ 2010-02-12: Simon Goldschmidt
+ * netif.c: netif_set_link_up/down: only do something if the link state
+ actually changes
+
+ 2010-02-12: Simon Goldschmidt/Stephane Lesage
+ * api_msg.c: Fixed bug #28865 (Cannot close socket/netconn in non-blocking
+ connect)
+
+ 2010-02-12: Simon Goldschmidt
+ * mem.h: Fixed bug #28866 (mem_realloc function defined in mem.h)
+
+ 2010-02-09: Simon Goldschmidt
+ * api_lib.c, api_msg.c, sockets.c, api.h, api_msg.h: Fixed bug #22110
+ (recv() makes receive window update for data that wasn't received by
+ application)
+
+ 2010-02-09: Simon Goldschmidt/Stephane Lesage
+ * sockets.c: Fixed bug #28853 (lwip_recvfrom() returns 0 on receive time-out
+ or any netconn_recv() error)
+
+ 2010-02-09: Simon Goldschmidt
+ * ppp.c: task #10154 (PPP: Update snmp in/out counters for tx/rx packets)
+
+ 2010-02-09: Simon Goldschmidt
+ * netif.c: For loopback packets, adjust the stats- and snmp-counters
+ for the loopback netif.
+
+ 2010-02-08: Simon Goldschmidt
+ * igmp.c/.h, ip.h: Moved most defines from igmp.h to igmp.c for clarity
+ since they are not used anywhere else.
+
+ 2010-02-08: Simon Goldschmidt (Stéphane Lesage)
+ * igmp.c, igmp.h, stats.c, stats.h: Improved IGMP stats
+ (patch from bug #28798)
+
+ 2010-02-08: Simon Goldschmidt (Stéphane Lesage)
+ * igmp.c: Fixed bug #28798 (Error in "Max Response Time" processing) and
+ another bug when LWIP_RAND() returns zero.
+
+ 2010-02-04: Simon Goldschmidt
+ * nearly every file: Use macros defined in ip_addr.h (some of them new)
+ to work with IP addresses (preparation for bug #27352 - Change ip_addr
+ from struct to typedef (u32_t) - and better code).
+
+ 2010-01-31: Simon Goldschmidt
+ * netif.c: Don't call the link-callback from netif_set_up/down() since
+ this invalidly retriggers DHCP.
+
+ 2010-01-29: Simon Goldschmidt
+ * ip_addr.h, inet.h, def.h, inet.c, def.c, more: Cleanly separate the
+ portability file inet.h and its contents from the stack: moved htonX-
+ functions to def.h (and the new def.c - they are not ipv4 dependent),
+ let inet.h depend on ip_addr.h and not the other way round.
+ This fixes bug #28732.
+
+ 2010-01-28: Kieran Mansley
+ * tcp.c: Ensure ssthresh >= 2*MSS
+
+ 2010-01-27: Simon Goldschmidt
+ * tcp.h, tcp.c, tcp_in.c: Fixed bug #27871: Calling tcp_abort() in recv
+ callback can lead to accessing unallocated memory. As a consequence,
+ ERR_ABRT means the application has called tcp_abort()!
+
+ 2010-01-25: Simon Goldschmidt
+ * snmp_structs.h, msg_in.c: Partly fixed bug #22070 (MIB_OBJECT_WRITE_ONLY
+ not implemented in SNMP): write-only or not-accessible are still
+ returned by getnext (though not by get)
+
+ 2010-01-24: Simon Goldschmidt
+ * snmp: Renamed the private mib node from 'private' to 'mib_private' to
+ not use reserved C/C++ keywords
+
+ 2010-01-23: Simon Goldschmidt
+ * sockets.c: Fixed bug #28716: select() returns 0 after waiting for less
+ than 1 ms
+
+ 2010-01-21: Simon Goldschmidt
+ * tcp.c, api_msg.c: Fixed bug #28651 (tcp_connect: no callbacks called
+ if tcp_enqueue fails) both in raw- and netconn-API
+
+ 2010-01-19: Simon Goldschmidt
+ * api_msg.c: Fixed bug #27316: netconn: Possible deadlock in err_tcp
+
+ 2010-01-18: Iordan Neshev/Simon Goldschmidt
+ * src/netif/ppp: reorganised PPP sourcecode to 2.3.11 including some
+ bugfix backports from 2.4.x.
+
+ 2010-01-18: Simon Goldschmidt
+ * mem.c: Fixed bug #28679: mem_realloc calculates mem_stats wrong
+
+ 2010-01-17: Simon Goldschmidt
+ * api_lib.c, api_msg.c, (api_msg.h, api.h, sockets.c, tcpip.c):
+ task #10102: "netconn: clean up conn->err threading issues" by adding
+ error return value to struct api_msg_msg
+
+ 2010-01-17: Simon Goldschmidt
+ * api.h, api_lib.c, sockets.c: Changed netconn_recv() and netconn_accept()
+ to return err_t (bugs #27709 and #28087)
+
+ 2010-01-14: Simon Goldschmidt
+ * ...: Use typedef for function prototypes throughout the stack.
+
+ 2010-01-13: Simon Goldschmidt
+ * api_msg.h/.c, api_lib.c: Fixed bug #26672 (close connection when receive
+ window = 0) by correctly draining recvmbox/acceptmbox
+
+ 2010-01-11: Simon Goldschmidt
+ * pap.c: Fixed bug #13315 (PPP PAP authentication can result in
+ erroneous callbacks) by copying the code from recent pppd
+
+ 2010-01-10: Simon Goldschmidt
+ * raw.c: Fixed bug #28506 (raw_bind should filter received packets)
+
+ 2010-01-10: Simon Goldschmidt
+ * tcp.h/.c: bug #28127 (remove call to tcp_output() from tcp_ack(_now)())
+
+ 2010-01-08: Simon Goldschmidt
+ * sockets.c: Fixed bug #28519 (lwip_recvfrom bug with len > 65535)
+
+ 2010-01-08: Simon Goldschmidt
+ * dns.c: Copy hostname for DNS_LOCAL_HOSTLIST_IS_DYNAMIC==1 since string
+ passed to dns_local_addhost() might be volatile
+
+ 2010-01-07: Simon Goldschmidt
+ * timers.c, tcp.h: Call tcp_timer_needed() with NO_SYS==1, too
+
+ 2010-01-06: Simon Goldschmidt
+ * netdb.h: Fixed bug #28496: missing include guards in netdb.h
+
+ 2009-12-31: Simon Goldschmidt
+ * many ppp files: Reorganised PPP source code from ucip structure to pppd
+ structure to easily compare our code against the pppd code (around v2.3.1)
+
+ 2009-12-27: Simon Goldschmidt
+ * tcp_in.c: Another fix for bug #28241 (ooseq processing) and adapted
+ unit test
+
+
+(STABLE-1.3.2)
+
+ ++ New features:
+
+ 2009-10-27 Simon Goldschmidt/Stephan Lesage
+ * netifapi.c/.h: Added netifapi_netif_set_addr()
+
+ 2009-10-07 Simon Goldschmidt/Fabian Koch
+ * api_msg.c, netbuf.c/.h, opt.h: patch #6888: Patch for UDP Netbufs to
+ support dest-addr and dest-port (optional: LWIP_NETBUF_RECVINFO)
+
+ 2009-08-26 Simon Goldschmidt/Simon Kallweit
+ * slipif.c/.h: bug #26397: SLIP polling support
+
+ 2009-08-25 Simon Goldschmidt
+ * opt.h, etharp.h/.c: task #9033: Support IEEE 802.1q tagged frame (VLAN),
+ New configuration options ETHARP_SUPPORT_VLAN and ETHARP_VLAN_CHECK.
+
+ 2009-08-25 Simon Goldschmidt
+ * ip_addr.h, netdb.c: patch #6900: added define ip_ntoa(struct ip_addr*)
+
+ 2009-08-24 Jakob Stoklund Olesen
+ * autoip.c, dhcp.c, netif.c: patch #6725: Teach AutoIP and DHCP to respond
+ to netif_set_link_up().
+
+ 2009-08-23 Simon Goldschmidt
+ * tcp.h/.c: Added function tcp_debug_state_str() to convert a tcp state
+ to a human-readable string.
+
+ ++ Bugfixes:
+
+ 2009-12-24: Kieran Mansley
+ * tcp_in.c Apply patches from Oleg Tyshev to improve OOS processing
+ (BUG#28241)
+
+ 2009-12-06: Simon Goldschmidt
+ * ppp.h/.c: Fixed bug #27079 (Yet another leak in PPP): outpacket_buf can
+ be statically allocated (like in ucip)
+
+ 2009-12-04: Simon Goldschmidt (patch by Ioardan Neshev)
+ * pap.c: patch #6969: PPP: missing PAP authentication UNTIMEOUT
+
+ 2009-12-03: Simon Goldschmidt
+ * tcp.h, tcp_in.c, tcp_out.c: Fixed bug #28106: dup ack for fast retransmit
+ could have non-zero length
+
+ 2009-12-02: Simon Goldschmidt
+ * tcp_in.c: Fixed bug #27904: TCP sends too many ACKs: delay resetting
+ tcp_input_pcb until after calling the pcb's callbacks
+
+ 2009-11-29: Simon Goldschmidt
+ * tcp_in.c: Fixed bug #28054: Two segments with FIN flag on the out-of-
+ sequence queue, also fixed PBUF_POOL leak in the out-of-sequence code
+
+ 2009-11-29: Simon Goldschmidt
+ * pbuf.c: Fixed bug #28064: pbuf_alloc(PBUF_POOL) is not thread-safe by
+ queueing a call into tcpip_thread to free ooseq-bufs if the pool is empty
+
+ 2009-11-26: Simon Goldschmidt
+ * tcp.h: Fixed bug #28098: Nagle can prevent fast retransmit from sending
+ segment
+
+ 2009-11-26: Simon Goldschmidt
+ * tcp.h, sockets.c: Fixed bug #28099: API required to disable Nagle
+ algorithm at PCB level
+
+ 2009-11-22: Simon Goldschmidt
+ * tcp_out.c: Fixed bug #27905: FIN isn't combined with data on unsent
+
+ 2009-11-22: Simon Goldschmidt (suggested by Bill Auerbach)
+ * tcp.c: tcp_alloc: prevent increasing stats.err for MEMP_TCP_PCB when
+ reusing time-wait pcb
+
+ 2009-11-20: Simon Goldschmidt (patch by Albert Bartel)
+ * sockets.c: Fixed bug #28062: Data received directly after accepting
+ does not wake up select
+
+ 2009-11-11: Simon Goldschmidt
+ * netdb.h: Fixed bug #27994: incorrect define for freeaddrinfo(addrinfo)
+
+ 2009-10-30: Simon Goldschmidt
+ * opt.h: Increased default value for TCP_MSS to 536, updated default
+ value for TCP_WND to 4*TCP_MSS to keep delayed ACK working.
+
+ 2009-10-28: Kieran Mansley
+ * tcp_in.c, tcp_out.c, tcp.h: re-work the fast retransmission code
+ to follow algorithm from TCP/IP Illustrated
+
+ 2009-10-27: Kieran Mansley
+ * tcp_in.c: fix BUG#27445: grow cwnd with every duplicate ACK
+
+ 2009-10-25: Simon Goldschmidt
+ * tcp.h: bug-fix in the TCP_EVENT_RECV macro (has to call tcp_recved if
+ pcb->recv is NULL to keep rcv_wnd correct)
+
+ 2009-10-25: Simon Goldschmidt
+ * tcp_in.c: Fixed bug #26251: RST process in TIME_WAIT TCP state
+
+ 2009-10-23: Simon Goldschmidt (David Empson)
+ * tcp.c: Fixed bug #27783: Silly window avoidance for small window sizes
+
+ 2009-10-21: Simon Goldschmidt
+ * tcp_in.c: Fixed bug #27215: TCP sent() callback gives leading and
+ trailing 1 byte len (SYN/FIN)
+
+ 2009-10-21: Simon Goldschmidt
+ * tcp_out.c: Fixed bug #27315: zero window probe and FIN
+
+ 2009-10-19: Simon Goldschmidt
+ * dhcp.c/.h: Minor code simplification (don't store received pbuf, change
+ conditional code to assert where applicable), check pbuf length before
+ testing for valid reply
+
+ 2009-10-19: Simon Goldschmidt
+ * dhcp.c: Removed most calls to udp_connect since they aren't necessary
+ when using udp_sendto_if() - always stay connected to IP_ADDR_ANY.
+
+ 2009-10-16: Simon Goldschmidt
+ * ip.c: Fixed bug #27390: Source IP check in ip_input() causes it to drop
+ valid DHCP packets -> allow 0.0.0.0 as source address when LWIP_DHCP is
+ enabled
+
+ 2009-10-15: Simon Goldschmidt (Oleg Tyshev)
+ * tcp_in.c: Fixed bug #27329: dupacks by unidirectional data transmit
+
+ 2009-10-15: Simon Goldschmidt
+ * api_lib.c: Fixed bug #27709: conn->err race condition on netconn_recv()
+ timeout
+
+ 2009-10-15: Simon Goldschmidt
+ * autoip.c: Fixed bug #27704: autoip starts with wrong address
+ LWIP_AUTOIP_CREATE_SEED_ADDR() returned address in host byte order instead
+ of network byte order
+
+ 2009-10-11 Simon Goldschmidt (Jörg Kesten)
+ * tcp_out.c: Fixed bug #27504: tcp_enqueue wrongly concatenates segments
+ which are not consecutive when retransmitting unacked segments
+
+ 2009-10-09 Simon Goldschmidt
+ * opt.h: Fixed default values of some stats to only be enabled if used
+ Fixes bug #27338: sys_stats is defined when NO_SYS = 1
+
+ 2009-08-30 Simon Goldschmidt
+ * ip.c: Fixed bug bug #27345: "ip_frag() does not use the LWIP_NETIF_LOOPBACK
+ function" by checking for loopback before calling ip_frag
+
+ 2009-08-25 Simon Goldschmidt
+ * dhcp.c: fixed invalid dependency to etharp_query if DHCP_DOES_ARP_CHECK==0
+
+ 2009-08-23 Simon Goldschmidt
+ * ppp.c: bug #27078: Possible memory leak in pppInit()
+
+ 2009-08-23 Simon Goldschmidt
+ * netdb.c, dns.c: bug #26657: DNS, if host name is "localhost", result
+ is error.
+
+ 2009-08-23 Simon Goldschmidt
+ * opt.h, init.c: bug #26649: TCP fails when TCP_MSS > TCP_SND_BUF
+ Fixed wrong parenthesis, added check in init.c
+
+ 2009-08-23 Simon Goldschmidt
+ * ppp.c: bug #27266: wait-state debug message in pppMain occurs every ms
+
+ 2009-08-23 Simon Goldschmidt
+ * many ppp files: bug #27267: Added include to string.h where needed
+
+ 2009-08-23 Simon Goldschmidt
+ * tcp.h: patch #6843: tcp.h macro optimization patch (for little endian)
+
+
+(STABLE-1.3.1)
+
+ ++ New features:
+
+ 2009-05-10 Simon Goldschmidt
+ * opt.h, sockets.c, pbuf.c, netbuf.h, pbuf.h: task #7013: Added option
+ LWIP_NETIF_TX_SINGLE_PBUF to try to create transmit packets from only
+ one pbuf to help MACs that don't support scatter-gather DMA.
+
+ 2009-05-09 Simon Goldschmidt
+ * icmp.h, icmp.c: Shrinked ICMP code, added option to NOT check icoming
+ ECHO pbuf for size (just use it): LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN
+
+ 2009-05-05 Simon Goldschmidt, Jakob Stoklund Olesen
+ * ip.h, ip.c: Added ip_current_netif() & ip_current_header() to receive
+ extended info about the currently received packet.
+
+ 2009-04-27 Simon Goldschmidt
+ * sys.h: Made SYS_LIGHTWEIGHT_PROT and sys_now() work with NO_SYS=1
+
+ 2009-04-25 Simon Goldschmidt
+ * mem.c, opt.h: Added option MEM_USE_POOLS_TRY_BIGGER_POOL to try the next
+ bigger malloc pool if one is empty (only usable with MEM_USE_POOLS).
+
+ 2009-04-21 Simon Goldschmidt
+ * dns.c, init.c, dns.h, opt.h: task #7507, patch #6786: DNS supports static
+ hosts table. New configuration options DNS_LOCAL_HOSTLIST and
+ DNS_LOCAL_HOSTLIST_IS_DYNAMIC. Also, DNS_LOOKUP_LOCAL_EXTERN() can be defined
+ as an external function for lookup.
+
+ 2009-04-15 Simon Goldschmidt
+ * dhcp.c: patch #6763: Global DHCP XID can be redefined to something more unique
+
+ 2009-03-31 Kieran Mansley
+ * tcp.c, tcp_out.c, tcp_in.c, sys.h, tcp.h, opts.h: add support for
+ TCP timestamp options, off by default. Rework tcp_enqueue() to
+ take option flags rather than specified option data
+
+ 2009-02-18 Simon Goldschmidt
+ * cc.h: Added printf formatter for size_t: SZT_F
+
+ 2009-02-16 Simon Goldschmidt (patch by Rishi Khan)
+ * icmp.c, opt.h: patch #6539: (configurable) response to broadcast- and multicast
+ pings
+
+ 2009-02-12 Simon Goldschmidt
+ * init.h: Added LWIP_VERSION to get the current version of the stack
+
+ 2009-02-11 Simon Goldschmidt (suggested by Gottfried Spitaler)
+ * opt.h, memp.h/.c: added MEMP_MEM_MALLOC to use mem_malloc/mem_free instead
+ of the pool allocator (can save code size with MEM_LIBC_MALLOC if libc-malloc
+ is otherwise used)
+
+ 2009-01-28 Jonathan Larmour (suggested by Bill Bauerbach)
+ * ipv4/inet_chksum.c, ipv4/lwip/inet_chksum.h: inet_chksum_pseudo_partial()
+ is only used by UDPLITE at present, so conditionalise it.
+
+ 2008-12-03 Simon Goldschmidt (base on patch from Luca Ceresoli)
+ * autoip.c: checked in (slightly modified) patch #6683: Customizable AUTOIP
+ "seed" address. This should reduce AUTOIP conflicts if
+ LWIP_AUTOIP_CREATE_SEED_ADDR is overridden.
+
+ 2008-10-02 Jonathan Larmour and Rishi Khan
+ * sockets.c (lwip_accept): Return EWOULDBLOCK if would block on non-blocking
+ socket.
+
+ 2008-06-30 Simon Goldschmidt
+ * mem.c, opt.h, stats.h: fixed bug #21433: Calling mem_free/pbuf_free from
+ interrupt context isn't safe: LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT allows
+ mem_free to run between mem_malloc iterations. Added illegal counter for
+ mem stats.
+
+ 2008-06-27 Simon Goldschmidt
+ * stats.h/.c, some other files: patch #6483: stats module improvement:
+ Added defines to display each module's statistic individually, added stats
+ defines for MEM, MEMP and SYS modules, removed (unused) rexmit counter.
+
+ 2008-06-17 Simon Goldschmidt
+ * err.h: patch #6459: Made err_t overridable to use a more efficient type
+ (define LWIP_ERR_T in cc.h)
+
+ 2008-06-17 Simon Goldschmidt
+ * slipif.c: patch #6480: Added a configuration option for slipif for symmetry
+ to loopif
+
+ 2008-06-17 Simon Goldschmidt (patch by Luca Ceresoli)
+ * netif.c, loopif.c, ip.c, netif.h, loopif.h, opt.h: Checked in slightly
+ modified version of patch # 6370: Moved loopif code to netif.c so that
+ loopback traffic is supported on all netifs (all local IPs).
+ Added option to limit loopback packets for each netifs.
+
+
+ ++ Bugfixes:
+ 2009-08-12 Kieran Mansley
+ * tcp_in.c, tcp.c: Fix bug #27209: handle trimming of segments when
+ out of window or out of order properly
+
+ 2009-08-12 Kieran Mansley
+ * tcp_in.c: Fix bug #27199: use snd_wl2 instead of snd_wl1
+
+ 2009-07-28 Simon Goldschmidt
+ * mem.h: Fixed bug #27105: "realloc() cannot replace mem_realloc()"s
+
+ 2009-07-27 Kieran Mansley
+ * api.h api_msg.h netdb.h sockets.h: add missing #include directives
+
+ 2009-07-09 Kieran Mansley
+ * api_msg.c, sockets.c, api.h: BUG23240 use signed counters for
+ recv_avail and don't increment counters until message successfully
+ sent to mbox
+
+ 2009-06-25 Kieran Mansley
+ * api_msg.c api.h: BUG26722: initialise netconn write variables
+ in netconn_alloc
+
+ 2009-06-25 Kieran Mansley
+ * tcp.h: BUG26879: set ret value in TCP_EVENT macros when function is not set
+
+ 2009-06-25 Kieran Mansley
+ * tcp.c, tcp_in.c, tcp_out.c, tcp.h: BUG26301 and BUG26267: correct
+ simultaneous close behaviour, and make snd_nxt have the same meaning
+ as in the RFCs.
+
+ 2009-05-12 Simon Goldschmidt
+ * etharp.h, etharp.c, netif.c: fixed bug #26507: "Gratuitous ARP depends on
+ arp_table / uses etharp_query" by adding etharp_gratuitous()
+
+ 2009-05-12 Simon Goldschmidt
+ * ip.h, ip.c, igmp.c: bug #26487: Added ip_output_if_opt that can add IP options
+ to the IP header (used by igmp_ip_output_if)
+
+ 2009-05-06 Simon Goldschmidt
+ * inet_chksum.c: On little endian architectures, use LWIP_PLATFORM_HTONS (if
+ defined) for SWAP_BYTES_IN_WORD to speed up checksumming.
+
+ 2009-05-05 Simon Goldschmidt
+ * sockets.c: bug #26405: Prematurely released semaphore causes lwip_select()
+ to crash
+
+ 2009-05-04 Simon Goldschmidt
+ * init.c: snmp was not initialized in lwip_init()
+
+ 2009-05-04 Frédéric Bernon
+ * dhcp.c, netbios.c: Changes if IP_SOF_BROADCAST is enabled.
+
+ 2009-05-03 Simon Goldschmidt
+ * tcp.h: bug #26349: Nagle algorithm doesn't send although segment is full
+ (and unsent->next == NULL)
+
+ 2009-05-02 Simon Goldschmidt
+ * tcpip.h, tcpip.c: fixed tcpip_untimeout (does not need the time, broken after
+ 1.3.0 in CVS only) - fixes compilation of ppp_oe.c
+
+ 2009-05-02 Simon Goldschmidt
+ * msg_in.c: fixed bug #25636: SNMPSET value is ignored for integer fields
+
+ 2009-05-01 Simon Goldschmidt
+ * pap.c: bug #21680: PPP upap_rauthnak() drops legal NAK packets
+
+ 2009-05-01 Simon Goldschmidt
+ * ppp.c: bug #24228: Memory corruption with PPP and DHCP
+
+ 2009-04-29 Frédéric Bernon
+ * raw.c, udp.c, init.c, opt.h, ip.h, sockets.h: bug #26309: Implement the
+ SO(F)_BROADCAST filter for all API layers. Avoid the unindented reception
+ of broadcast packets even when this option wasn't set. Port maintainers
+ which want to enable this filter have to set IP_SOF_BROADCAST=1 in opt.h.
+ If you want this option also filter broadcast on recv operations, you also
+ have to set IP_SOF_BROADCAST_RECV=1 in opt.h.
+
+ 2009-04-28 Simon Goldschmidt, Jakob Stoklund Olesen
+ * dhcp.c: patch #6721, bugs #25575, #25576: Some small fixes to DHCP and
+ DHCP/AUTOIP cooperation
+
+ 2009-04-25 Simon Goldschmidt, Oleg Tyshev
+ * tcp_out.c: bug #24212: Deadlocked tcp_retransmit due to exceeded pcb->cwnd
+ Fixed by sorting the unsent and unacked queues (segments are inserted at the
+ right place in tcp_output and tcp_rexmit).
+
+ 2009-04-25 Simon Goldschmidt
+ * memp.c, mem.c, memp.h, mem_std.h: bug #26213 "Problem with memory allocation
+ when debugging": memp_sizes contained the wrong sizes (including sanity
+ regions); memp pools for MEM_USE_POOLS were too small
+
+ 2009-04-24 Simon Goldschmidt, Frédéric Bernon
+ * inet.c: patch #6765: Fix a small problem with the last changes (incorrect
+ behavior, with with ip address string not ended by a '\0', a space or a
+ end of line)
+
+ 2009-04-19 Simon Goldschmidt
+ * rawapi.txt: Fixed bug #26069: Corrected documentation: if tcp_connect fails,
+ pcb->err is called, not pcb->connected (with an error code).
+
+ 2009-04-19 Simon Goldschmidt
+ * tcp_out.c: Fixed bug #26236: "TCP options (timestamp) don't work with
+ no-copy-tcpwrite": deallocate option data, only concat segments with same flags
+
+ 2009-04-19 Simon Goldschmidt
+ * tcp_out.c: Fixed bug #25094: "Zero-length pbuf" (options are now allocated
+ in the header pbuf, not the data pbuf)
+
+ 2009-04-18 Simon Goldschmidt
+ * api_msg.c: fixed bug #25695: Segmentation fault in do_writemore()
+
+ 2009-04-15 Simon Goldschmidt
+ * sockets.c: tried to fix bug #23559: lwip_recvfrom problem with tcp
+
+ 2009-04-15 Simon Goldschmidt
+ * dhcp.c: task #9192: mem_free of dhcp->options_in and dhcp->msg_in
+
+ 2009-04-15 Simon Goldschmidt
+ * ip.c, ip6.c, tcp_out.c, ip.h: patch #6808: Add a utility function
+ ip_hinted_output() (for smaller code mainly)
+
+ 2009-04-15 Simon Goldschmidt
+ * inet.c: patch #6765: Supporting new line characters in inet_aton()
+
+ 2009-04-15 Simon Goldschmidt
+ * dhcp.c: patch #6764: DHCP rebind and renew did not send hostnam option;
+ Converted constant OPTION_MAX_MSG_SIZE to netif->mtu, check if netif->mtu
+ is big enough in dhcp_start
+
+ 2009-04-15 Simon Goldschmidt
+ * netbuf.c: bug #26027: netbuf_chain resulted in pbuf memory leak
+
+ 2009-04-15 Simon Goldschmidt
+ * sockets.c, ppp.c: bug #25763: corrected 4 occurrences of SMEMCPY to MEMCPY
+
+ 2009-04-15 Simon Goldschmidt
+ * sockets.c: bug #26121: set_errno can be overridden
+
+ 2009-04-09 Kieran Mansley (patch from Luca Ceresoli <lucaceresoli>)
+ * init.c, opt.h: Patch#6774 TCP_QUEUE_OOSEQ breaks compilation when
+ LWIP_TCP==0
+
+ 2009-04-09 Kieran Mansley (patch from Roy Lee <roylee17>)
+ * tcp.h: Patch#6802 Add do-while-clauses to those function like
+ macros in tcp.h
+
+ 2009-03-31 Kieran Mansley
+ * tcp.c, tcp_in.c, tcp_out.c, tcp.h, opt.h: Rework the way window
+ updates are calculated and sent (BUG20515)
+
+ * tcp_in.c: cope with SYN packets received during established states,
+ and retransmission of initial SYN.
+
+ * tcp_out.c: set push bit correctly when tcp segments are merged
+
+ 2009-03-27 Kieran Mansley
+ * tcp_out.c set window correctly on probes (correcting change made
+ yesterday)
+
+ 2009-03-26 Kieran Mansley
+ * tcp.c, tcp_in.c, tcp.h: add tcp_abandon() to cope with dropping
+ connections where no reset required (bug #25622)
+
+ * tcp_out.c: set TCP_ACK flag on keepalive and zero window probes
+ (bug #20779)
+
+ 2009-02-18 Simon Goldschmidt (Jonathan Larmour and Bill Auerbach)
+ * ip_frag.c: patch #6528: the buffer used for IP_FRAG_USES_STATIC_BUF could be
+ too small depending on MEM_ALIGNMENT
+
+ 2009-02-16 Simon Goldschmidt
+ * sockets.h/.c, api_*.h/.c: fixed arguments of socket functions to match the standard;
+ converted size argument of netconn_write to 'size_t'
+
+ 2009-02-16 Simon Goldschmidt
+ * tcp.h, tcp.c: fixed bug #24440: TCP connection close problem on 64-bit host
+ by moving accept callback function pointer to TCP_PCB_COMMON
+
+ 2009-02-12 Simon Goldschmidt
+ * dhcp.c: fixed bug #25345 (DHCPDECLINE is sent with "Maximum message size"
+ option)
+
+ 2009-02-11 Simon Goldschmidt
+ * dhcp.c: fixed bug #24480 (releasing old udp_pdb and pbuf in dhcp_start)
+
+ 2009-02-11 Simon Goldschmidt
+ * opt.h, api_msg.c: added configurable default valud for netconn->recv_bufsize:
+ RECV_BUFSIZE_DEFAULT (fixes bug #23726: pbuf pool exhaustion on slow recv())
+
+ 2009-02-10 Simon Goldschmidt
+ * tcp.c: fixed bug #25467: Listen backlog is not reset on timeout in SYN_RCVD:
+ Accepts_pending is decrease on a corresponding listen pcb when a connection
+ in state SYN_RCVD is close.
+
+ 2009-01-28 Jonathan Larmour
+ * pbuf.c: reclaim pbufs from TCP out-of-sequence segments if we run
+ out of pool pbufs.
+
+ 2008-12-19 Simon Goldschmidt
+ * many files: patch #6699: fixed some warnings on platform where sizeof(int) == 2
+
+ 2008-12-10 Tamas Somogyi, Frédéric Bernon
+ * sockets.c: fixed bug #25051: lwip_recvfrom problem with udp: fromaddr and
+ port uses deleted netbuf.
+
+ 2008-10-18 Simon Goldschmidt
+ * tcp_in.c: fixed bug ##24596: Vulnerability on faulty TCP options length
+ in tcp_parseopt
+
+ 2008-10-15 Simon Goldschmidt
+ * ip_frag.c: fixed bug #24517: IP reassembly crashes on unaligned IP headers
+ by packing the struct ip_reass_helper.
+
+ 2008-10-03 David Woodhouse, Jonathan Larmour
+ * etharp.c (etharp_arp_input): Fix type aliasing problem copying ip address.
+
+ 2008-10-02 Jonathan Larmour
+ * dns.c: Hard-code structure sizes, to avoid issues on some compilers where
+ padding is included.
+
+ 2008-09-30 Jonathan Larmour
+ * sockets.c (lwip_accept): check addr isn't NULL. If it's valid, do an
+ assertion check that addrlen isn't NULL.
+
+ 2008-09-30 Jonathan Larmour
+ * tcp.c: Fix bug #24227, wrong error message in tcp_bind.
+
+ 2008-08-26 Simon Goldschmidt
+ * inet.h, ip_addr.h: fixed bug #24132: Cross-dependency between ip_addr.h and
+ inet.h -> moved declaration of struct in_addr from ip_addr.h to inet.h
+
+ 2008-08-14 Simon Goldschmidt
+ * api_msg.c: fixed bug #23847: do_close_internal references freed memory (when
+ tcp_close returns != ERR_OK)
+
+ 2008-07-08 Frédéric Bernon
+ * stats.h: Fix some build bugs introduced with patch #6483 (missing some parameters
+ in macros, mainly if MEM_STATS=0 and MEMP_STATS=0).
+
+ 2008-06-24 Jonathan Larmour
+ * tcp_in.c: Fix for bug #23693 as suggested by Art R. Ensure cseg is unused
+ if tcp_seg_copy fails.
+
+ 2008-06-17 Simon Goldschmidt
+ * inet_chksum.c: Checked in some ideas of patch #6460 (loop optimizations)
+ and created defines for swapping bytes and folding u32 to u16.
+
+ 2008-05-30 Kieran Mansley
+ * tcp_in.c Remove redundant "if" statement, and use real rcv_wnd
+ rather than rcv_ann_wnd when deciding if packets are in-window.
+ Contributed by <arasmussen@consultant.datasys.swri.edu>
+
+ 2008-05-30 Kieran Mansley
+ * mem.h: Fix BUG#23254. Change macro definition of mem_* to allow
+ passing as function pointers when MEM_LIBC_MALLOC is defined.
+
+ 2008-05-09 Jonathan Larmour
+ * err.h, err.c, sockets.c: Fix bug #23119: Reorder timeout error code to
+ stop it being treated as a fatal error.
+
+ 2008-04-15 Simon Goldschmidt
+ * dhcp.c: fixed bug #22804: dhcp_stop doesn't clear NETIF_FLAG_DHCP
+ (flag now cleared)
+
+ 2008-03-27 Simon Goldschmidt
+ * mem.c, tcpip.c, tcpip.h, opt.h: fixed bug #21433 (Calling mem_free/pbuf_free
+ from interrupt context isn't safe): set LWIP_USE_HEAP_FROM_INTERRUPT to 1
+ in lwipopts.h or use pbuf_free_callback(p)/mem_free_callback(m) to free pbufs
+ or heap memory from interrupt context
+
+ 2008-03-26 Simon Goldschmidt
+ * tcp_in.c, tcp.c: fixed bug #22249: division by zero could occur if a remote
+ host sent a zero mss as TCP option.
+
+
+(STABLE-1.3.0)
+
+ ++ New features:
+
+ 2008-03-10 Jonathan Larmour
+ * inet_chksum.c: Allow choice of one of the sample algorithms to be
+ made from lwipopts.h. Fix comment on how to override LWIP_CHKSUM.
+
+ 2008-01-22 Frédéric Bernon
+ * tcp.c, tcp_in.c, tcp.h, opt.h: Rename LWIP_CALCULATE_EFF_SEND_MSS in
+ TCP_CALCULATE_EFF_SEND_MSS to have coherent TCP options names.
+
+ 2008-01-14 Frédéric Bernon
+ * rawapi.txt, api_msg.c, tcp.c, tcp_in.c, tcp.h: changes for task #7675 "Enable
+ to refuse data on a TCP_EVENT_RECV call". Important, behavior changes for the
+ tcp_recv callback (see rawapi.txt).
+
+ 2008-01-14 Frédéric Bernon, Marc Chaland
+ * ip.c: Integrate patch #6369" ip_input : checking before realloc".
+
+ 2008-01-12 Frédéric Bernon
+ * tcpip.h, tcpip.c, api.h, api_lib.c, api_msg.c, sockets.c: replace the field
+ netconn::sem per netconn::op_completed like suggested for the task #7490
+ "Add return value to sys_mbox_post".
+
+ 2008-01-12 Frédéric Bernon
+ * api_msg.c, opt.h: replace DEFAULT_RECVMBOX_SIZE per DEFAULT_TCP_RECVMBOX_SIZE,
+ DEFAULT_UDP_RECVMBOX_SIZE and DEFAULT_RAW_RECVMBOX_SIZE (to optimize queues
+ sizes), like suggested for the task #7490 "Add return value to sys_mbox_post".
+
+ 2008-01-10 Frédéric Bernon
+ * tcpip.h, tcpip.c: add tcpip_callback_with_block function for the task #7490
+ "Add return value to sys_mbox_post". tcpip_callback is always defined as
+ "blocking" ("block" parameter = 1).
+
+ 2008-01-10 Frédéric Bernon
+ * tcpip.h, tcpip.c, api.h, api_lib.c, api_msg.c, sockets.c: replace the field
+ netconn::mbox (sys_mbox_t) per netconn::sem (sys_sem_t) for the task #7490
+ "Add return value to sys_mbox_post".
+
+ 2008-01-05 Frédéric Bernon
+ * sys_arch.txt, api.h, api_lib.c, api_msg.h, api_msg.c, tcpip.c, sys.h, opt.h:
+ Introduce changes for task #7490 "Add return value to sys_mbox_post" with some
+ modifications in the sys_mbox api: sys_mbox_new take a "size" parameters which
+ indicate the number of pointers query by the mailbox. There is three defines
+ in opt.h to indicate sizes for tcpip::mbox, netconn::recvmbox, and for the
+ netconn::acceptmbox. Port maintainers, you can decide to just add this new
+ parameter in your implementation, but to ignore it to keep the previous behavior.
+ The new sys_mbox_trypost function return a value to know if the mailbox is
+ full or if the message is posted. Take a look to sys_arch.txt for more details.
+ This new function is used in tcpip_input (so, can be called in an interrupt
+ context since the function is not blocking), and in recv_udp and recv_raw.
+
+ 2008-01-04 Frédéric Bernon, Simon Goldschmidt, Jonathan Larmour
+ * rawapi.txt, api.h, api_lib.c, api_msg.h, api_msg.c, sockets.c, tcp.h, tcp.c,
+ tcp_in.c, init.c, opt.h: rename backlog options with TCP_ prefix, limit the
+ "backlog" parameter in an u8_t, 0 is interpreted as "smallest queue", add
+ documentation in the rawapi.txt file.
+
+ 2007-12-31 Kieran Mansley (based on patch from Per-Henrik Lundbolm)
+ * tcp.c, tcp_in.c, tcp_out.c, tcp.h: Add TCP persist timer
+
+ 2007-12-31 Frédéric Bernon, Luca Ceresoli
+ * autoip.c, etharp.c: ip_addr.h: Integrate patch #6348: "Broadcast ARP packets
+ in autoip". The change in etharp_raw could be removed, since all calls to
+ etharp_raw use ethbroadcast for the "ethdst_addr" parameter. But it could be
+ wrong in the future.
+
+ 2007-12-30 Frédéric Bernon, Tom Evans
+ * ip.c: Fix bug #21846 "LwIP doesn't appear to perform any IP Source Address
+ Filtering" reported by Tom Evans.
+
+ 2007-12-21 Frédéric Bernon, Simon Goldschmidt, Jonathan Larmour
+ * tcp.h, opt.h, api.h, api_msg.h, tcp.c, tcp_in.c, api_lib.c, api_msg.c,
+ sockets.c, init.c: task #7252: Implement TCP listen backlog: Warning: raw API
+ applications have to call 'tcp_accepted(pcb)' in their accept callback to
+ keep accepting new connections.
+
+ 2007-12-13 Frédéric Bernon
+ * api_msg.c, err.h, err.c, sockets.c, dns.c, dns.h: replace "enum dns_result"
+ by err_t type. Add a new err_t code "ERR_INPROGRESS".
+
+ 2007-12-12 Frédéric Bernon
+ * dns.h, dns.c, opt.h: move DNS options to the "right" place. Most visibles
+ are the one which have ram usage.
+
+ 2007-12-05 Frédéric Bernon
+ * netdb.c: add a LWIP_DNS_API_HOSTENT_STORAGE option to decide to use a static
+ set of variables (=0) or a local one (=1). In this last case, your port should
+ provide a function "struct hostent* sys_thread_hostent( struct hostent* h)"
+ which have to do a copy of "h" and return a pointer ont the "per-thread" copy.
+
+ 2007-12-03 Simon Goldschmidt
+ * ip.c: ip_input: check if a packet is for inp first before checking all other
+ netifs on netif_list (speeds up packet receiving in most cases)
+
+ 2007-11-30 Simon Goldschmidt
+ * udp.c, raw.c: task #7497: Sort lists (pcb, netif, ...) for faster access
+ UDP: move a (connected) pcb selected for input to the front of the list of
+ pcbs so that it is found faster next time. Same for RAW pcbs that have eaten
+ a packet.
+
+ 2007-11-28 Simon Goldschmidt
+ * etharp.c, stats.c, stats.h, opt.h: Introduced ETHARP_STATS
+
+ 2007-11-25 Simon Goldschmidt
+ * dhcp.c: dhcp_unfold_reply() uses pbuf_copy_partial instead of its own copy
+ algorithm.
+
+ 2007-11-24 Simon Goldschmidt
+ * netdb.h, netdb.c, sockets.h/.c: Moved lwip_gethostbyname from sockets.c
+ to the new file netdb.c; included lwip_getaddrinfo.
+
+ 2007-11-21 Simon Goldschmidt
+ * tcp.h, opt.h, tcp.c, tcp_in.c: implemented calculating the effective send-mss
+ based on the MTU of the netif used to send. Enabled by default. Disable by
+ setting LWIP_CALCULATE_EFF_SEND_MSS to 0. This fixes bug #21492.
+
+ 2007-11-19 Frédéric Bernon
+ * api_msg.c, dns.h, dns.c: Implement DNS_DOES_NAME_CHECK option (check if name
+ received match the name query), implement DNS_USES_STATIC_BUF (the place where
+ copy dns payload to parse the response), return an error if there is no place
+ for a new query, and fix some minor problems.
+
+ 2007-11-16 Simon Goldschmidt
+ * new files: ipv4/inet.c, ipv4/inet_chksum.c, ipv6/inet6.c
+ removed files: core/inet.c, core/inet6.c
+ Moved inet files into ipv4/ipv6 directory; splitted inet.c/inet.h into
+ inet and chksum part; changed includes in all lwIP files as appropriate
+
+ 2007-11-16 Simon Goldschmidt
+ * api.h, api_msg.h, api_lib.c, api_msg.c, socket.h, socket.c: Added sequential
+ dns resolver function for netconn api (netconn_gethostbyname) and socket api
+ (gethostbyname/gethostbyname_r).
+
+ 2007-11-15 Jim Pettinato, Frédéric Bernon
+ * opt.h, init.c, tcpip.c, dhcp.c, dns.h, dns.c: add DNS client for simple name
+ requests with RAW api interface. Initialization is done in lwip_init() with
+ build time options. DNS timer is added in tcpip_thread context. DHCP can set
+ DNS server ip addresses when options are received. You need to set LWIP_DNS=1
+ in your lwipopts.h file (LWIP_DNS=0 in opt.h). DNS_DEBUG can be set to get
+ some traces with LWIP_DEBUGF. Sanity check have been added. There is a "todo"
+ list with points to improve.
+
+ 2007-11-06 Simon Goldschmidt
+ * opt.h, mib2.c: Patch #6215: added ifAdminStatus write support (if explicitly
+ enabled by defining SNMP_SAFE_REQUESTS to 0); added code to check link status
+ for ifOperStatus if LWIP_NETIF_LINK_CALLBACK is defined.
+
+ 2007-11-06 Simon Goldschmidt
+ * api.h, api_msg.h and dependent files: Task #7410: Removed the need to include
+ core header files in api.h (ip/tcp/udp/raw.h) to hide the internal
+ implementation from netconn api applications.
+
+ 2007-11-03 Frédéric Bernon
+ * api.h, api_lib.c, api_msg.c, sockets.c, opt.h: add SO_RCVBUF option for UDP &
+ RAW netconn. You need to set LWIP_SO_RCVBUF=1 in your lwipopts.h (it's disabled
+ by default). Netconn API users can use the netconn_recv_bufsize macro to access
+ it. This is a first release which have to be improve for TCP. Note it used the
+ netconn::recv_avail which need to be more "thread-safe" (note there is already
+ the problem for FIONREAD with lwip_ioctl/ioctlsocket).
+
+ 2007-11-01 Frédéric Bernon, Marc Chaland
+ * sockets.h, sockets.c, api.h, api_lib.c, api_msg.h, api_msg.c, tcp.h, tcp_out.c:
+ Integrate "patch #6250 : MSG_MORE flag for send". MSG_MORE is used at socket api
+ layer, NETCONN_MORE at netconn api layer, and TCP_WRITE_FLAG_MORE at raw api
+ layer. This option enable to delayed TCP PUSH flag on multiple "write" calls.
+ Note that previous "copy" parameter for "write" APIs is now called "apiflags".
+
+ 2007-10-24 Frédéric Bernon
+ * api.h, api_lib.c, api_msg.c: Add macro API_EVENT in the same spirit than
+ TCP_EVENT_xxx macros to get a code more readable. It could also help to remove
+ some code (like we have talk in "patch #5919 : Create compile switch to remove
+ select code"), but it could be done later.
+
+ 2007-10-08 Simon Goldschmidt
+ * many files: Changed initialization: many init functions are not needed any
+ more since we now rely on the compiler initializing global and static
+ variables to zero!
+
+ 2007-10-06 Simon Goldschmidt
+ * ip_frag.c, memp.c, mib2.c, ip_frag.h, memp_std.h, opt.h: Changed IP_REASSEMBLY
+ to enqueue the received pbufs so that multiple packets can be reassembled
+ simultaneously and no static reassembly buffer is needed.
+
+ 2007-10-05 Simon Goldschmidt
+ * tcpip.c, etharp.h, etharp.c: moved ethernet_input from tcpip.c to etharp.c so
+ all netifs (or ports) can use it.
+
+ 2007-10-05 Frédéric Bernon
+ * netifapi.h, netifapi.c: add function netifapi_netif_set_default. Change the
+ common function to reduce a little bit the footprint (for all functions using
+ only the "netif" parameter).
+
+ 2007-10-03 Frédéric Bernon
+ * netifapi.h, netifapi.c: add functions netifapi_netif_set_up, netifapi_netif_set_down,
+ netifapi_autoip_start and netifapi_autoip_stop. Use a common function to reduce
+ a little bit the footprint (for all functions using only the "netif" parameter).
+
+ 2007-09-15 Frédéric Bernon
+ * udp.h, udp.c, sockets.c: Changes for "#20503 IGMP Improvement". Add IP_MULTICAST_IF
+ option in socket API, and a new field "multicast_ip" in "struct udp_pcb" (for
+ netconn and raw API users), only if LWIP_IGMP=1. Add getsockopt processing for
+ IP_MULTICAST_TTL and IP_MULTICAST_IF.
+
+ 2007-09-10 Frédéric Bernon
+ * snmp.h, mib2.c: enable to remove SNMP timer (which consumne several cycles
+ even when it's not necessary). snmp_agent.txt tell to call snmp_inc_sysuptime()
+ each 10ms (but, it's intrusive if you use sys_timeout feature). Now, you can
+ decide to call snmp_add_sysuptime(100) each 1000ms (which is bigger "step", but
+ call to a lower frequency). Or, you can decide to not call snmp_inc_sysuptime()
+ or snmp_add_sysuptime(), and to define the SNMP_GET_SYSUPTIME(sysuptime) macro.
+ This one is undefined by default in mib2.c. SNMP_GET_SYSUPTIME is called inside
+ snmp_get_sysuptime(u32_t *value), and enable to change "sysuptime" value only
+ when it's queried (any direct call to "sysuptime" is changed by a call to
+ snmp_get_sysuptime).
+
+ 2007-09-09 Frédéric Bernon, Bill Florac
+ * igmp.h, igmp.c, netif.h, netif.c, ip.c: To enable to have interfaces with IGMP,
+ and others without it, there is a new NETIF_FLAG_IGMP flag to set in netif->flags
+ if you want IGMP on an interface. igmp_stop() is now called inside netif_remove().
+ igmp_report_groups() is now called inside netif_set_link_up() (need to have
+ LWIP_NETIF_LINK_CALLBACK=1) to resend reports once the link is up (avoid to wait
+ the next query message to receive the matching multicast streams).
+
+ 2007-09-08 Frédéric Bernon
+ * sockets.c, ip.h, api.h, tcp.h: declare a "struct ip_pcb" which only contains
+ IP_PCB. Add in the netconn's "pcb" union a "struct ip_pcb *ip;" (no size change).
+ Use this new field to access to common pcb fields (ttl, tos, so_options, etc...).
+ Enable to access to these fields with LWIP_TCP=0.
+
+ 2007-09-05 Frédéric Bernon
+ * udp.c, ipv4/icmp.c, ipv4/ip.c, ipv6/icmp.c, ipv6/ip6.c, ipv4/icmp.h,
+ ipv6/icmp.h, opt.h: Integrate "task #7272 : LWIP_ICMP option". The new option
+ LWIP_ICMP enable/disable ICMP module inside the IP stack (enable per default).
+ Be careful, disabling ICMP make your product non-compliant to RFC1122, but
+ help to reduce footprint, and to reduce "visibility" on the Internet.
+
+ 2007-09-05 Frédéric Bernon, Bill Florac
+ * opt.h, sys.h, tcpip.c, slipif.c, ppp.c, sys_arch.txt: Change parameters list
+ for sys_thread_new (see "task #7252 : Create sys_thread_new_ex()"). Two new
+ parameters have to be provided: a task name, and a task stack size. For this
+ one, since it's platform dependant, you could define the best one for you in
+ your lwipopts.h. For port maintainers, you can just add these new parameters
+ in your sys_arch.c file, and but it's not mandatory, use them in your OS
+ specific functions.
+
+ 2007-09-05 Frédéric Bernon
+ * inet.c, autoip.c, msg_in.c, msg_out.c, init.c: Move some build time checkings
+ inside init.c for task #7142 "Sanity check user-configurable values".
+
+ 2007-09-04 Frédéric Bernon, Bill Florac
+ * igmp.h, igmp.c, memp_std.h, memp.c, init.c, opt.h: Replace mem_malloc call by
+ memp_malloc, and use a new MEMP_NUM_IGMP_GROUP option (see opt.h to define the
+ value). It will avoid potential fragmentation problems, use a counter to know
+ how many times a group is used on an netif, and free it when all applications
+ leave it. MEMP_NUM_IGMP_GROUP got 8 as default value (and init.c got a sanity
+ check if LWIP_IGMP!=0).
+
+ 2007-09-03 Frédéric Bernon
+ * igmp.h, igmp.c, sockets.c, api_msg.c: Changes for "#20503 IGMP Improvement".
+ Initialize igmp_mac_filter to NULL in netif_add (this field should be set in
+ the netif's "init" function). Use the "imr_interface" field (for socket layer)
+ and/or the "interface" field (for netconn layer), for join/leave operations.
+ The igmp_join/leavegroup first parameter change from a netif to an ipaddr.
+ This field could be a netif's ipaddr, or "any" (same meaning than ip_addr_isany).
+
+ 2007-08-30 Frédéric Bernon
+ * Add netbuf.h, netbuf.c, Change api.h, api_lib.c: #7249 "Split netbuf functions
+ from api/api_lib". Now netbuf API is independant of netconn, and can be used
+ with other API (application based on raw API, or future "socket2" API). Ports
+ maintainers just have to add src/api/netbuf.c in their makefile/projects.
+
+ 2007-08-30 Frédéric Bernon, Jonathan Larmour
+ * init.c: Add first version of lwip_sanity_check for task #7142 "Sanity check
+ user-configurable values".
+
+ 2007-08-29 Frédéric Bernon
+ * igmp.h, igmp.c, tcpip.c, init.c, netif.c: change igmp_init and add igmp_start.
+ igmp_start is call inside netif_add. Now, igmp initialization is in the same
+ spirit than the others modules. Modify some IGMP debug traces.
+
+ 2007-08-29 Frédéric Bernon
+ * Add init.h, init.c, Change opt.h, tcpip.c: Task #7213 "Add a lwip_init function"
+ Add lwip_init function to regroup all modules initializations, and to provide
+ a place to add code for task #7142 "Sanity check user-configurable values".
+ Ports maintainers should remove direct initializations calls from their code,
+ and add init.c in their makefiles. Note that lwip_init() function is called
+ inside tcpip_init, but can also be used by raw api users since all calls are
+ disabled when matching options are disabled. Also note that their is new options
+ in opt.h, you should configure in your lwipopts.h (they are enabled per default).
+
+ 2007-08-26 Marc Boucher
+ * api_msg.c: do_close_internal(): Reset the callbacks and arg (conn) to NULL
+ since they can under certain circumstances be called with an invalid conn
+ pointer after the connection has been closed (and conn has been freed).
+
+ 2007-08-25 Frédéric Bernon (Artem Migaev's Patch)
+ * netif.h, netif.c: Integrate "patch #6163 : Function to check if link layer is up".
+ Add a netif_is_link_up() function if LWIP_NETIF_LINK_CALLBACK option is set.
+
+ 2007-08-22 Frédéric Bernon
+ * netif.h, netif.c, opt.h: Rename LWIP_NETIF_CALLBACK in LWIP_NETIF_STATUS_CALLBACK
+ to be coherent with new LWIP_NETIF_LINK_CALLBACK option before next release.
+
+ 2007-08-22 Frédéric Bernon
+ * tcpip.h, tcpip.c, ethernetif.c, opt.h: remove options ETHARP_TCPIP_INPUT &
+ ETHARP_TCPIP_ETHINPUT, now, only "ethinput" code is supported, even if the
+ name is tcpip_input (we keep the name of 1.2.0 function).
+
+ 2007-08-17 Jared Grubb
+ * memp_std.h, memp.h, memp.c, mem.c, stats.c: (Task #7136) Centralize mempool
+ settings into new memp_std.h and optional user file lwippools.h. This adds
+ more dynamic mempools, and allows the user to create an arbitrary number of
+ mempools for mem_malloc.
+
+ 2007-08-16 Marc Boucher
+ * api_msg.c: Initialize newconn->state to NETCONN_NONE in accept_function;
+ otherwise it was left to NETCONN_CLOSE and sent_tcp() could prematurely
+ close the connection.
+
+ 2007-08-16 Marc Boucher
+ * sockets.c: lwip_accept(): check netconn_peer() error return.
+
+ 2007-08-16 Marc Boucher
+ * mem.c, mem.h: Added mem_calloc().
+
+ 2007-08-16 Marc Boucher
+ * tcpip.c, tcpip.h memp.c, memp.h: Added distinct memp (MEMP_TCPIP_MSG_INPKT)
+ for input packets to prevent floods from consuming all of MEMP_TCPIP_MSG
+ and starving other message types.
+ Renamed MEMP_TCPIP_MSG to MEMP_TCPIP_MSG_API
+
+ 2007-08-16 Marc Boucher
+ * pbuf.c, pbuf.h, etharp.c, tcp_in.c, sockets.c: Split pbuf flags in pbuf
+ type and flgs (later renamed to flags).
+ Use enum pbuf_flag as pbuf_type. Renumber PBUF_FLAG_*.
+ Improved lwip_recvfrom(). TCP push now propagated.
+
+ 2007-08-16 Marc Boucher
+ * ethernetif.c, contrib/ports/various: ethbroadcast now a shared global
+ provided by etharp.
+
+ 2007-08-16 Marc Boucher
+ * ppp_oe.c ppp_oe.h, auth.c chap.c fsm.c lcp.c ppp.c ppp.h,
+ etharp.c ethernetif.c, etharp.h, opt.h tcpip.h, tcpip.c:
+ Added PPPoE support and various PPP improvements.
+
+ 2007-07-25 Simon Goldschmidt
+ * api_lib.c, ip_frag.c, pbuf.c, api.h, pbuf.h: Introduced pbuf_copy_partial,
+ making netbuf_copy_partial use this function.
+
+ 2007-07-25 Simon Goldschmidt
+ * tcp_in.c: Fix bug #20506: Slow start / initial congestion window starts with
+ 2 * mss (instead of 1 * mss previously) to comply with some newer RFCs and
+ other stacks.
+
+ 2007-07-13 Jared Grubb (integrated by Frédéric Bernon)
+ * opt.h, netif.h, netif.c, ethernetif.c: Add new configuration option to add
+ a link callback in the netif struct, and functions to handle it. Be carefull
+ for port maintainers to add the NETIF_FLAG_LINK_UP flag (like in ethernetif.c)
+ if you want to be sure to be compatible with future changes...
+
+ 2007-06-30 Frédéric Bernon
+ * sockets.h, sockets.c: Implement MSG_PEEK flag for recv/recvfrom functions.
+
+ 2007-06-21 Simon Goldschmidt
+ * etharp.h, etharp.c: Combined etharp_request with etharp_raw for both
+ LWIP_AUTOIP =0 and =1 to remove redundant code.
+
+ 2007-06-21 Simon Goldschmidt
+ * mem.c, memp.c, mem.h, memp.h, opt.h: task #6863: Introduced the option
+ MEM_USE_POOLS to use 4 pools with different sized elements instead of a
+ heap. This both prevents memory fragmentation and gives a higher speed
+ at the cost of more memory consumption. Turned off by default.
+
+ 2007-06-21 Simon Goldschmidt
+ * api_lib.c, api_msg.c, api.h, api_msg.h: Converted the length argument of
+ netconn_write (and therefore also api_msg_msg.msg.w.len) from u16_t into
+ int to be able to send a bigger buffer than 64K with one time (mainly
+ used from lwip_send).
+
+ 2007-06-21 Simon Goldschmidt
+ * tcp.h, api_msg.c: Moved the nagle algorithm from netconn_write/do_write
+ into a define (tcp_output_nagle) in tcp.h to provide it to raw api users, too.
+
+ 2007-06-21 Simon Goldschmidt
+ * api.h, api_lib.c, api_msg.c: Fixed bug #20021: Moved sendbuf-processing in
+ netconn_write from api_lib.c to api_msg.c to also prevent multiple context-
+ changes on low memory or empty send-buffer.
+
+ 2007-06-18 Simon Goldschmidt
+ * etharp.c, etharp.h: Changed etharp to use a defined hardware address length
+ of 6 to avoid loading netif->hwaddr_len every time (since this file is only
+ used for ethernet and struct eth_addr already had a defined length of 6).
+
+ 2007-06-17 Simon Goldschmidt
+ * sockets.c, sockets.h: Implemented socket options SO_NO_CHECK for UDP sockets
+ to disable UDP checksum generation on transmit.
+
+ 2007-06-13 Frédéric Bernon, Simon Goldschmidt
+ * debug.h, api_msg.c: change LWIP_ERROR to use it to check errors like invalid
+ pointers or parameters, and let the possibility to redefined it in cc.h. Use
+ this macro to check "conn" parameter in api_msg.c functions.
+
+ 2007-06-11 Simon Goldschmidt
+ * sockets.c, sockets.h: Added UDP lite support for sockets
+
+ 2007-06-10 Simon Goldschmidt
+ * udp.h, opt.h, api_msg.c, ip.c, udp.c: Included switch LWIP_UDPLITE (enabled
+ by default) to switch off UDP-Lite support if not needed (reduces udp.c code
+ size)
+
+ 2007-06-09 Dominik Spies (integrated by Frédéric Bernon)
+ * autoip.h, autoip.c, dhcp.h, dhcp.c, netif.h, netif.c, etharp.h, etharp.c, opt.h:
+ AutoIP implementation available for IPv4, with new options LWIP_AUTOIP and
+ LWIP_DHCP_AUTOIP_COOP if you want to cooperate with DHCP. Some tips to adapt
+ (see TODO mark in the source code).
+
+ 2007-06-09 Simon Goldschmidt
+ * etharp.h, etharp.c, ethernetif.c: Modified order of parameters for
+ etharp_output() to match netif->output so etharp_output() can be used
+ directly as netif->output to save one function call.
+
+ 2007-06-08 Simon Goldschmidt
+ * netif.h, ethernetif.c, slipif.c, loopif.c: Added define
+ NETIF_INIT_SNMP(netif, type, speed) to initialize per-netif snmp variables,
+ added initialization of those to ethernetif, slipif and loopif.
+
+ 2007-05-18 Simon Goldschmidt
+ * opt.h, ip_frag.c, ip_frag.h, ip.c: Added option IP_FRAG_USES_STATIC_BUF
+ (defaulting to off for now) that can be set to 0 to send fragmented
+ packets by passing PBUF_REFs down the stack.
+
+ 2007-05-23 Frédéric Bernon
+ * api_lib.c: Implement SO_RCVTIMEO for accept and recv on TCP
+ connections, such present in patch #5959.
+
+ 2007-05-23 Frédéric Bernon
+ * api.h, api_lib.c, api_msg.c, sockets.c: group the different NETCONN_UDPxxx
+ code in only one part...
+
+ 2007-05-18 Simon Goldschmidt
+ * opt.h, memp.h, memp.c: Added option MEMP_OVERFLOW_CHECK to check for memp
+ elements to overflow. This is achieved by adding some bytes before and after
+ each pool element (increasing their size, of course), filling them with a
+ prominent value and checking them on freeing the element.
+ Set it to 2 to also check every element in every pool each time memp_malloc()
+ or memp_free() is called (slower but more helpful).
+
+ 2007-05-10 Simon Goldschmidt
+ * opt.h, memp.h, memp.c, pbuf.c (see task #6831): use a new memp pool for
+ PBUF_POOL pbufs instead of the old pool implementation in pbuf.c to reduce
+ code size.
+
+ 2007-05-11 Frédéric Bernon
+ * sockets.c, api_lib.c, api_msg.h, api_msg.c, netifapi.h, netifapi.c, tcpip.c:
+ Include a function pointer instead of a table index in the message to reduce
+ footprint. Disable some part of lwip_send and lwip_sendto if some options are
+ not set (LWIP_TCP, LWIP_UDP, LWIP_RAW).
+
+ 2007-05-10 Simon Goldschmidt
+ * *.h (except netif/ppp/*.h): Included patch #5448: include '#ifdef __cplusplus
+ \ extern "C" {' in all header files. Now you can write your application using
+ the lwIP stack in C++ and simply #include the core files. Note I have left
+ out the netif/ppp/*h header files for now, since I don't know which files are
+ included by applications and which are for internal use only.
+
+ 2007-05-09 Simon Goldschmidt
+ * opt.h, *.c/*.h: Included patch #5920: Create define to override C-library
+ memcpy. 2 Defines are created: MEMCPY() for normal memcpy, SMEMCPY() for
+ situations where some compilers might inline the copy and save a function
+ call. Also replaced all calls to memcpy() with calls to (S)MEMCPY().
+
+ 2007-05-08 Simon Goldschmidt
+ * mem.h: If MEM_LIBC_MALLOC==1, allow the defines (e.g. mem_malloc() -> malloc())
+ to be overriden in case the C-library malloc implementation is not protected
+ against concurrent access.
+
+ 2007-05-04 Simon Goldschmidt (Atte Kojo)
+ * etharp.c: Introduced fast one-entry-cache to speed up ARP lookup when sending
+ multiple packets to the same host.
+
+ 2007-05-04 Frédéric Bernon, Jonathan Larmour
+ * sockets.c, api.h, api_lib.c, api_msg.h, api_msg.c: Fix bug #19162 "lwip_sento: a possible
+ to corrupt remote addr/port connection state". Reduce problems "not enought memory" with
+ netbuf (if we receive lot of datagrams). Improve lwip_sendto (only one exchange between
+ sockets api and api_msg which run in tcpip_thread context). Add netconn_sento function.
+ Warning, if you directly access to "fromaddr" & "fromport" field from netbuf struct,
+ these fields are now renamed "addr" & "port".
+
+ 2007-04-11 Jonathan Larmour
+ * sys.h, api_lib.c: Provide new sys_mbox_tryfetch function. Require ports to provide new
+ sys_arch_mbox_tryfetch function to get a message if one is there, otherwise return
+ with SYS_MBOX_EMPTY. sys_arch_mbox_tryfetch can be implemented as a function-like macro
+ by the port in sys_arch.h if desired.
+
+ 2007-04-06 Frédéric Bernon, Simon Goldschmidt
+ * opt.h, tcpip.h, tcpip.c, netifapi.h, netifapi.c: New configuration option LWIP_NETIF_API
+ allow to use thread-safe functions to add/remove netif in list, and to start/stop dhcp
+ clients, using new functions from netifapi.h. Disable as default (no port change to do).
+
+ 2007-04-05 Frédéric Bernon
+ * sockets.c: remplace ENOBUFS errors on alloc_socket by ENFILE to be more BSD compliant.
+
+ 2007-04-04 Simon Goldschmidt
+ * arch.h, api_msg.c, dhcp.c, msg_in.c, sockets.c: Introduced #define LWIP_UNUSED_ARG(x)
+ use this for and architecture-independent form to tell the compiler you intentionally
+ are not using this variable. Can be overriden in cc.h.
+
+ 2007-03-28 Frédéric Bernon
+ * opt.h, netif.h, dhcp.h, dhcp.c: New configuration option LWIP_NETIF_HOSTNAME allow to
+ define a hostname in netif struct (this is just a pointer, so, you can use a hardcoded
+ string, point on one of your's ethernetif field, or alloc a string you will free yourself).
+ It will be used by DHCP to register a client hostname, but can also be use when you call
+ snmp_set_sysname.
+
+ 2007-03-28 Frédéric Bernon
+ * netif.h, netif.c: A new NETIF_FLAG_ETHARP flag is defined in netif.h, to allow to
+ initialize a network interface's flag with. It tell this interface is an ethernet
+ device, and we can use ARP with it to do a "gratuitous ARP" (RFC 3220 "IP Mobility
+ Support for IPv4" section 4.6) when interface is "up" with netif_set_up().
+
+ 2007-03-26 Frédéric Bernon, Jonathan Larmour
+ * opt.h, tcpip.c: New configuration option LWIP_ARP allow to disable ARP init at build
+ time if you only use PPP or SLIP. The default is enable. Note we don't have to call
+ etharp_init in your port's initilization sequence if you use tcpip.c, because this call
+ is done in tcpip_init function.
+
+ 2007-03-22 Frédéric Bernon
+ * stats.h, stats.c, msg_in.c: Stats counters can be change to u32_t if necessary with the
+ new option LWIP_STATS_LARGE. If you need this option, define LWIP_STATS_LARGE to 1 in
+ your lwipopts.h. More, unused counters are not defined in the stats structs, and not
+ display by stats_display(). Note that some options (SYS_STATS and RAW_STATS) are defined
+ but never used. Fix msg_in.c with the correct #if test for a stat display.
+
+ 2007-03-21 Kieran Mansley
+ * netif.c, netif.h: Apply patch#4197 with some changes (originator: rireland@hmgsl.com).
+ Provides callback on netif up/down state change.
+
+ 2007-03-11 Frédéric Bernon, Mace Gael, Steve Reynolds
+ * sockets.h, sockets.c, api.h, api_lib.c, api_msg.h, api_msg.c, igmp.h, igmp.c,
+ ip.c, netif.h, tcpip.c, opt.h:
+ New configuration option LWIP_IGMP to enable IGMP processing. Based on only one
+ filter per all network interfaces. Declare a new function in netif to enable to
+ control the MAC filter (to reduce lwIP traffic processing).
+
+ 2007-03-11 Frédéric Bernon
+ * tcp.h, tcp.c, sockets.c, tcp_out.c, tcp_in.c, opt.h: Keepalive values can
+ be configured at run time with LWIP_TCP_KEEPALIVE, but don't change this
+ unless you know what you're doing (default are RFC1122 compliant). Note
+ that TCP_KEEPIDLE and TCP_KEEPINTVL have to be set in seconds.
+
+ 2007-03-08 Frédéric Bernon
+ * tcp.h: Keepalive values can be configured at compile time, but don't change
+ this unless you know what you're doing (default are RFC1122 compliant).
+
+ 2007-03-08 Frédéric Bernon
+ * sockets.c, api.h, api_lib.c, tcpip.c, sys.h, sys.c, err.c, opt.h:
+ Implement LWIP_SO_RCVTIMEO configuration option to enable/disable SO_RCVTIMEO
+ on UDP sockets/netconn.
+
+ 2007-03-08 Simon Goldschmidt
+ * snmp_msg.h, msg_in.c: SNMP UDP ports can be configured at compile time.
+
+ 2007-03-06 Frédéric Bernon
+ * api.h, api_lib.c, sockets.h, sockets.c, tcpip.c, sys.h, sys.c, err.h:
+ Implement SO_RCVTIMEO on UDP sockets/netconn.
+
+ 2007-02-28 Kieran Mansley (based on patch from Simon Goldschmidt)
+ * api_lib.c, tcpip.c, memp.c, memp.h: make API msg structs allocated
+ on the stack and remove the API msg type from memp
+
+ 2007-02-26 Jonathan Larmour (based on patch from Simon Goldschmidt)
+ * sockets.h, sockets.c: Move socket initialization to new
+ lwip_socket_init() function.
+ NOTE: this changes the API with ports. Ports will have to be
+ updated to call lwip_socket_init() now.
+
+ 2007-02-26 Jonathan Larmour (based on patch from Simon Goldschmidt)
+ * api_lib.c: Use memcpy in netbuf_copy_partial.
+
+
+ ++ Bug fixes:
+
+ 2008-03-17 Frédéric Bernon, Ed Kerekes
+ * igmp.h, igmp.c: Fix bug #22613 "IGMP iphdr problem" (could have
+ some problems to fill the IP header on some targets, use now the
+ ip.h macros to do it).
+
+ 2008-03-13 Frédéric Bernon
+ * sockets.c: Fix bug #22435 "lwip_recvfrom with TCP break;". Using
+ (lwip_)recvfrom with valid "from" and "fromlen" parameters, on a
+ TCP connection caused a crash. Note that using (lwip_)recvfrom
+ like this is a bit slow and that using (lwip)getpeername is the
+ good lwip way to do it (so, using recv is faster on tcp sockets).
+
+ 2008-03-12 Frédéric Bernon, Jonathan Larmour
+ * api_msg.c, contrib/apps/ping.c: Fix bug #22530 "api_msg.c's
+ recv_raw() does not consume data", and the ping sample (with
+ LWIP_SOCKET=1, the code did the wrong supposition that lwip_recvfrom
+ returned the IP payload, without the IP header).
+
+ 2008-03-04 Jonathan Larmour
+ * mem.c, stats.c, mem.h: apply patch #6414 to avoid compiler errors
+ and/or warnings on some systems where mem_size_t and size_t differ.
+ * pbuf.c, ppp.c: Fix warnings on some systems with mem_malloc.
+
+ 2008-03-04 Kieran Mansley (contributions by others)
+ * Numerous small compiler error/warning fixes from contributions to
+ mailing list after 1.3.0 release candidate made.
+
+ 2008-01-25 Cui hengbin (integrated by Frédéric Bernon)
+ * dns.c: Fix bug #22108 "DNS problem" caused by unaligned structures.
+
+ 2008-01-15 Kieran Mansley
+ * tcp_out.c: BUG20511. Modify persist timer to start when we are
+ prevented from sending by a small send window, not just a zero
+ send window.
+
+ 2008-01-09 Jonathan Larmour
+ * opt.h, ip.c: Rename IP_OPTIONS define to IP_OPTIONS_ALLOWED to avoid
+ conflict with Linux system headers.
+
+ 2008-01-06 Jonathan Larmour
+ * dhcp.c: fix bug #19927: "DHCP NACK problem" by clearing any existing set IP
+ address entirely on receiving a DHCPNAK, and restarting discovery.
+
+ 2007-12-21 Simon Goldschmidt
+ * sys.h, api_lib.c, api_msg.c, sockets.c: fix bug #21698: "netconn->recv_avail
+ is not protected" by using new macros for interlocked access to modify/test
+ netconn->recv_avail.
+
+ 2007-12-20 Kieran Mansley (based on patch from Oleg Tyshev)
+ * tcp_in.c: fix bug# 21535 (nrtx not reset correctly in SYN_SENT state)
+
+ 2007-12-20 Kieran Mansley (based on patch from Per-Henrik Lundbolm)
+ * tcp.c, tcp_in.c, tcp_out.c, tcp.h: fix bug #20199 (better handling
+ of silly window avoidance and prevent lwIP from shrinking the window)
+
+ 2007-12-04 Simon Goldschmidt
+ * tcp.c, tcp_in.c: fix bug #21699 (segment leak in ooseq processing when last
+ data packet was lost): add assert that all segment lists are empty in
+ tcp_pcb_remove before setting pcb to CLOSED state; don't directly set CLOSED
+ state from LAST_ACK in tcp_process
+
+ 2007-12-02 Simon Goldschmidt
+ * sockets.h: fix bug #21654: exclude definition of struct timeval from #ifndef FD_SET
+ If including <sys/time.h> for system-struct timeval, LWIP_TIMEVAL_PRIVATE now
+ has to be set to 0 in lwipopts.h
+
+ 2007-12-02 Simon Goldschmidt
+ * api_msg.c, api_lib.c: fix bug #21656 (recvmbox problem in netconn API): always
+ allocate a recvmbox in netconn_new_with_proto_and_callback. For a tcp-listen
+ netconn, this recvmbox is later freed and a new mbox is allocated for acceptmbox.
+ This is a fix for thread-safety and allocates all items needed for a netconn
+ when the netconn is created.
+
+ 2007-11-30 Simon Goldschmidt
+ * udp.c: first attempt to fix bug #21655 (DHCP doesn't work reliably with multiple
+ netifs): if LWIP_DHCP is enabled, UDP packets to DHCP_CLIENT_PORT are passed
+ to netif->dhcp->pcb only (if that exists) and not to any other pcb for the same
+ port (only solution to let UDP pcbs 'bind' to a netif instead of an IP address)
+
+ 2007-11-27 Simon Goldschmidt
+ * ip.c: fixed bug #21643 (udp_send/raw_send don't fail if netif is down) by
+ letting ip_route only use netifs that are up.
+
+ 2007-11-27 Simon Goldschmidt
+ * err.h, api_lib.c, api_msg.c, sockets.c: Changed error handling: ERR_MEM, ERR_BUF
+ and ERR_RTE are seen as non-fatal, all other errors are fatal. netconns and
+ sockets block most operations once they have seen a fatal error.
+
+ 2007-11-27 Simon Goldschmidt
+ * udp.h, udp.c, dhcp.c: Implemented new function udp_sendto_if which takes the
+ netif to send as an argument (to be able to send on netifs that are down).
+
+ 2007-11-26 Simon Goldschmidt
+ * tcp_in.c: Fixed bug #21582: pcb->acked accounting can be wrong when ACKs
+ arrive out-of-order
+
+ 2007-11-21 Simon Goldschmidt
+ * tcp.h, tcp_out.c, api_msg.c: Fixed bug #20287: tcp_output_nagle sends too early
+ Fixed the nagle algorithm; nagle now also works for all raw API applications
+ and has to be explicitly disabled with 'tcp_pcb->flags |= TF_NODELAY'
+
+ 2007-11-12 Frédéric Bernon
+ * sockets.c, api.h, api_lib.c, api_msg.h, api_msg.c: Fixed bug #20900. Now, most
+ of the netconn_peer and netconn_addr processing is done inside tcpip_thread
+ context in do_getaddr.
+
+ 2007-11-10 Simon Goldschmidt
+ * etharp.c: Fixed bug: assert fired when MEMP_ARP_QUEUE was empty (which can
+ happen any time). Now the packet simply isn't enqueued when out of memory.
+
+ 2007-11-01 Simon Goldschmidt
+ * tcp.c, tcp_in.c: Fixed bug #21494: The send mss (pcb->mss) is set to 536 (or
+ TCP_MSS if that is smaller) as long as no MSS option is received from the
+ remote host.
+
+ 2007-11-01 Simon Goldschmidt
+ * tcp.h, tcp.c, tcp_in.c: Fixed bug #21491: The MSS option sent (with SYN)
+ is now based on TCP_MSS instead of pcb->mss (on passive open now effectively
+ sending our configured TCP_MSS instead of the one received).
+
+ 2007-11-01 Simon Goldschmidt
+ * tcp_in.c: Fixed bug #21181: On active open, the initial congestion window was
+ calculated based on the configured TCP_MSS, not on the MSS option received
+ with SYN+ACK.
+
+ 2007-10-09 Simon Goldschmidt
+ * udp.c, inet.c, inet.h: Fixed UDPLite: send: Checksum was always generated too
+ short and also was generated wrong if checksum coverage != tot_len;
+ receive: checksum was calculated wrong if checksum coverage != tot_len
+
+ 2007-10-08 Simon Goldschmidt
+ * mem.c: lfree was not updated in mem_realloc!
+
+ 2007-10-07 Frédéric Bernon
+ * sockets.c, api.h, api_lib.c: First step to fix "bug #20900 : Potential
+ crash error problem with netconn_peer & netconn_addr". VERY IMPORTANT:
+ this change cause an API breakage for netconn_addr, since a parameter
+ type change. Any compiler should cause an error without any changes in
+ yours netconn_peer calls (so, it can't be a "silent change"). It also
+ reduce a little bit the footprint for socket layer (lwip_getpeername &
+ lwip_getsockname use now a common lwip_getaddrname function since
+ netconn_peer & netconn_addr have the same parameters).
+
+ 2007-09-20 Simon Goldschmidt
+ * tcp.c: Fixed bug #21080 (tcp_bind without check pcbs in TIME_WAIT state)
+ by checking tcp_tw_pcbs also
+
+ 2007-09-19 Simon Goldschmidt
+ * icmp.c: Fixed bug #21107 (didn't reset IP TTL in ICMP echo replies)
+
+ 2007-09-15 Mike Kleshov
+ * mem.c: Fixed bug #21077 (inaccuracy in calculation of lwip_stat.mem.used)
+
+ 2007-09-06 Frédéric Bernon
+ * several-files: replace some #include "arch/cc.h" by "lwip/arch.h", or simply remove
+ it as long as "lwip/opt.h" is included before (this one include "lwip/debug.h" which
+ already include "lwip/arch.h"). Like that, default defines are provided by "lwip/arch.h"
+ if they are not defined in cc.h, in the same spirit than "lwip/opt.h" for lwipopts.h.
+
+ 2007-08-30 Frédéric Bernon
+ * igmp.h, igmp.c: Some changes to remove some redundant code, add some traces,
+ and fix some coding style.
+
+ 2007-08-28 Frédéric Bernon
+ * tcpip.c: Fix TCPIP_MSG_INPKT processing: now, tcpip_input can be used for any
+ kind of packets. These packets are considered like Ethernet packets (payload
+ pointing to ethhdr) if the netif got the NETIF_FLAG_ETHARP flag. Else, packets
+ are considered like IP packets (payload pointing to iphdr).
+
+ 2007-08-27 Frédéric Bernon
+ * api.h, api_lib.c, api_msg.c: First fix for "bug #20900 : Potential crash error
+ problem with netconn_peer & netconn_addr". Introduce NETCONN_LISTEN netconn_state
+ and remove obsolete ones (NETCONN_RECV & NETCONN_ACCEPT).
+
+ 2007-08-24 Kieran Mansley
+ * inet.c Modify (acc >> 16) test to ((acc >> 16) != 0) to help buggy
+ compiler (Paradigm C++)
+
+ 2007-08-09 Frédéric Bernon, Bill Florac
+ * stats.h, stats.c, igmp.h, igmp.c, opt.h: Fix for bug #20503 : IGMP Improvement.
+ Introduce IGMP_STATS to centralize statistics management.
+
+ 2007-08-09 Frédéric Bernon, Bill Florac
+ * udp.c: Fix for bug #20503 : IGMP Improvement. Enable to receive a multicast
+ packet on a udp pcb binded on an netif's IP address, and not on "any".
+
+ 2007-08-09 Frédéric Bernon, Bill Florac
+ * igmp.h, igmp.c, ip.c: Fix minor changes from bug #20503 : IGMP Improvement.
+ This is mainly on using lookup/lookfor, and some coding styles...
+
+ 2007-07-26 Frédéric Bernon (and "thedoctor")
+ * igmp.c: Fix bug #20595 to accept IGMPv3 "Query" messages.
+
+ 2007-07-25 Simon Goldschmidt
+ * api_msg.c, tcp.c: Another fix for bug #20021: by not returning an error if
+ tcp_output fails in tcp_close, the code in do_close_internal gets simpler
+ (tcp_output is called again later from tcp timers).
+
+ 2007-07-25 Simon Goldschmidt
+ * ip_frag.c: Fixed bug #20429: use the new pbuf_copy_partial instead of the old
+ copy_from_pbuf, which illegally modified the given pbuf.
+
+ 2007-07-25 Simon Goldschmidt
+ * tcp_out.c: tcp_enqueue: pcb->snd_queuelen didn't work for chaine PBUF_RAMs:
+ changed snd_queuelen++ to snd_queuelen += pbuf_clen(p).
+
+ 2007-07-24 Simon Goldschmidt
+ * api_msg.c, tcp.c: Fix bug #20480: Check the pcb passed to tcp_listen() for the
+ correct state (must be CLOSED).
+
+ 2007-07-13 Thomas Taranowski (commited by Jared Grubb)
+ * memp.c: Fix bug #20478: memp_malloc returned NULL+MEMP_SIZE on failed
+ allocation. It now returns NULL.
+
+ 2007-07-13 Frédéric Bernon
+ * api_msg.c: Fix bug #20318: api_msg "recv" callbacks don't call pbuf_free in
+ all error cases.
+
+ 2007-07-13 Frédéric Bernon
+ * api_msg.c: Fix bug #20315: possible memory leak problem if tcp_listen failed,
+ because current code doesn't follow rawapi.txt documentation.
+
+ 2007-07-13 Kieran Mansley
+ * src/core/tcp_in.c Apply patch#5741 from Oleg Tyshev to fix bug in
+ out of sequence processing of received packets
+
+ 2007-07-03 Simon Goldschmidt
+ * nearly-all-files: Added assertions where PBUF_RAM pbufs are used and an
+ assumption is made that this pbuf is in one piece (i.e. not chained). These
+ assumptions clash with the possibility of converting to fully pool-based
+ pbuf implementations, where PBUF_RAM pbufs might be chained.
+
+ 2007-07-03 Simon Goldschmidt
+ * api.h, api_lib.c, api_msg.c: Final fix for bug #20021 and some other problems
+ when closing tcp netconns: removed conn->sem, less context switches when
+ closing, both netconn_close and netconn_delete should safely close tcp
+ connections.
+
+ 2007-07-02 Simon Goldschmidt
+ * ipv4/ip.h, ipv6/ip.h, opt.h, netif.h, etharp.h, ipv4/ip.c, netif.c, raw.c,
+ tcp_out.c, udp.c, etharp.c: Added option LWIP_NETIF_HWADDRHINT (default=off)
+ to cache ARP table indices with each pcb instead of single-entry cache for
+ the complete stack.
+
+ 2007-07-02 Simon Goldschmidt
+ * tcp.h, tcp.c, tcp_in.c, tcp_out.c: Added some ASSERTS and casts to prevent
+ warnings when assigning to smaller types.
+
+ 2007-06-28 Simon Goldschmidt
+ * tcp_out.c: Added check to prevent tcp_pcb->snd_queuelen from overflowing.
+
+ 2007-06-28 Simon Goldschmidt
+ * tcp.h: Fixed bug #20287: Fixed nagle algorithm (sending was done too early if
+ a segment contained chained pbufs)
+
+ 2007-06-28 Frédéric Bernon
+ * autoip.c: replace most of rand() calls by a macro LWIP_AUTOIP_RAND which compute
+ a "pseudo-random" value based on netif's MAC and some autoip fields. It's always
+ possible to define this macro in your own lwipopts.h to always use C library's
+ rand(). Note that autoip_create_rand_addr doesn't use this macro.
+
+ 2007-06-28 Frédéric Bernon
+ * netifapi.h, netifapi.c, tcpip.h, tcpip.c: Update code to handle the option
+ LWIP_TCPIP_CORE_LOCKING, and do some changes to be coherent with last modifications
+ in api_lib/api_msg (use pointers and not type with table, etc...)
+
+ 2007-06-26 Simon Goldschmidt
+ * udp.h: Fixed bug #20259: struct udp_hdr was lacking the packin defines.
+
+ 2007-06-25 Simon Goldschmidt
+ * udp.c: Fixed bug #20253: icmp_dest_unreach was called with a wrong p->payload
+ for udp packets with no matching pcb.
+
+ 2007-06-25 Simon Goldschmidt
+ * udp.c: Fixed bug #20220: UDP PCB search in udp_input(): a non-local match
+ could get udp input packets if the remote side matched.
+
+ 2007-06-13 Simon Goldschmidt
+ * netif.c: Fixed bug #20180 (TCP pcbs listening on IP_ADDR_ANY could get
+ changed in netif_set_ipaddr if previous netif->ip_addr.addr was 0.
+
+ 2007-06-13 Simon Goldschmidt
+ * api_msg.c: pcb_new sets conn->err if protocol is not implemented
+ -> netconn_new_..() does not allocate a new connection for unsupported
+ protocols.
+
+ 2007-06-13 Frédéric Bernon, Simon Goldschmidt
+ * api_lib.c: change return expression in netconn_addr and netconn_peer, because
+ conn->err was reset to ERR_OK without any reasons (and error was lost)...
+
+ 2007-06-13 Frédéric Bernon, Matthias Weisser
+ * opt.h, mem.h, mem.c, memp.c, pbuf.c, ip_frag.c, vj.c: Fix bug #20162. Rename
+ MEM_ALIGN in LWIP_MEM_ALIGN and MEM_ALIGN_SIZE in LWIP_MEM_ALIGN_SIZE to avoid
+ some macro names collision with some OS macros.
+
+ 2007-06-11 Simon Goldschmidt
+ * udp.c: UDP Lite: corrected the use of chksum_len (based on RFC3828: if it's 0,
+ create checksum over the complete packet. On RX, if it's < 8 (and not 0),
+ discard the packet. Also removed the duplicate 'udphdr->chksum = 0' for both
+ UDP & UDP Lite.
+
+ 2007-06-11 Srinivas Gollakota & Oleg Tyshev
+ * tcp_out.c: Fix for bug #20075 : "A problem with keep-alive timer and TCP flags"
+ where TCP flags wasn't initialized in tcp_keepalive.
+
+ 2007-06-03 Simon Goldschmidt
+ * udp.c: udp_input(): Input pbuf was not freed if pcb had no recv function
+ registered, p->payload was modified without modifying p->len if sending
+ icmp_dest_unreach() (had no negative effect but was definitively wrong).
+
+ 2007-06-03 Simon Goldschmidt
+ * icmp.c: Corrected bug #19937: For responding to an icmp echo request, icmp
+ re-used the input pbuf even if that didn't have enough space to include the
+ link headers. Now the space is tested and a new pbuf is allocated for the
+ echo response packet if the echo request pbuf isn't big enough.
+
+ 2007-06-01 Simon Goldschmidt
+ * sockets.c: Checked in patch #5914: Moved sockopt processing into tcpip_thread.
+
+ 2007-05-23 Frédéric Bernon
+ * api_lib.c, sockets.c: Fixed bug #5958 for netconn_listen (acceptmbox only
+ allocated by do_listen if success) and netconn_accept errors handling. In
+ most of api_lib functions, we replace some errors checkings like "if (conn==NULL)"
+ by ASSERT, except for netconn_delete.
+
+ 2007-05-23 Frédéric Bernon
+ * api_lib.c: Fixed bug #5957 "Safe-thread problem inside netconn_recv" to return
+ an error code if it's impossible to fetch a pbuf on a TCP connection (and not
+ directly close the recvmbox).
+
+ 2007-05-22 Simon Goldschmidt
+ * tcp.c: Fixed bug #1895 (tcp_bind not correct) by introducing a list of
+ bound but unconnected (and non-listening) tcp_pcbs.
+
+ 2007-05-22 Frédéric Bernon
+ * sys.h, sys.c, api_lib.c, tcpip.c: remove sys_mbox_fetch_timeout() (was only
+ used for LWIP_SO_RCVTIMEO option) and use sys_arch_mbox_fetch() instead of
+ sys_mbox_fetch() in api files. Now, users SHOULD NOT use internal lwIP features
+ like "sys_timeout" in their application threads.
+
+ 2007-05-22 Frédéric Bernon
+ * api.h, api_lib.c, api_msg.h, api_msg.c: change the struct api_msg_msg to see
+ which parameters are used by which do_xxx function, and to avoid "misusing"
+ parameters (patch #5938).
+
+ 2007-05-22 Simon Goldschmidt
+ * api_lib.c, api_msg.c, raw.c, api.h, api_msg.h, raw.h: Included patch #5938:
+ changed raw_pcb.protocol from u16_t to u8_t since for IPv4 and IPv6, proto
+ is only 8 bits wide. This affects the api, as there, the protocol was
+ u16_t, too.
+
+ 2007-05-18 Simon Goldschmidt
+ * memp.c: addition to patch #5913: smaller pointer was returned but
+ memp_memory was the same size -> did not save memory.
+
+ 2007-05-16 Simon Goldschmidt
+ * loopif.c, slipif.c: Fix bug #19729: free pbuf if netif->input() returns
+ != ERR_OK.
+
+ 2007-05-16 Simon Goldschmidt
+ * api_msg.c, udp.c: If a udp_pcb has a local_ip set, check if it is the same
+ as the one of the netif used for sending to prevent sending from old
+ addresses after a netif address gets changed (partly fixes bug #3168).
+
+ 2007-05-16 Frédéric Bernon
+ * tcpip.c, igmp.h, igmp.c: Fixed bug "#19800 : IGMP: igmp_tick() will not work
+ with NO_SYS=1". Note that igmp_init is always in tcpip_thread (and not in
+ tcpip_init) because we have to be sure that network interfaces are already
+ added (mac filter is updated only in igmp_init for the moment).
+
+ 2007-05-16 Simon Goldschmidt
+ * mem.c, memp.c: Removed semaphores from memp, changed sys_sem_wait calls
+ into sys_arch_sem_wait calls to prevent timers from running while waiting
+ for the heap. This fixes bug #19167.
+
+ 2007-05-13 Simon Goldschmidt
+ * tcp.h, sockets.h, sockets.c: Fixed bug from patch #5865 by moving the defines
+ for socket options (lwip_set/-getsockopt) used with level IPPROTO_TCP from
+ tcp.h to sockets.h.
+
+ 2007-05-07 Simon Goldschmidt
+ * mem.c: Another attempt to fix bug #17922.
+
+ 2007-05-04 Simon Goldschmidt
+ * pbuf.c, pbuf.h, etharp.c: Further update to ARP queueing: Changed pbuf_copy()
+ implementation so that it can be reused (don't allocate the target
+ pbuf inside pbuf_copy()).
+
+ 2007-05-04 Simon Goldschmidt
+ * memp.c: checked in patch #5913: in memp_malloc() we can return memp as mem
+ to save a little RAM (next pointer of memp is not used while not in pool).
+
+ 2007-05-03 "maq"
+ * sockets.c: Fix ioctl FIONREAD when some data remains from last recv.
+ (patch #3574).
+
+ 2007-04-23 Simon Goldschmidt
+ * loopif.c, loopif.h, opt.h, src/netif/FILES: fix bug #2595: "loopif results
+ in NULL reference for incoming TCP packets". Loopif has to be configured
+ (using LWIP_LOOPIF_MULTITHREADING) to directly call netif->input()
+ (multithreading environments, e.g. netif->input() = tcpip_input()) or
+ putting packets on a list that is fed to the stack by calling loopif_poll()
+ (single-thread / NO_SYS / polling environment where e.g.
+ netif->input() = ip_input).
+
+ 2007-04-17 Jonathan Larmour
+ * pbuf.c: Use s32_t in pbuf_realloc(), as an s16_t can't reliably hold
+ the difference between two u16_t's.
+ * sockets.h: FD_SETSIZE needs to match number of sockets, which is
+ MEMP_NUM_NETCONN in sockets.c right now.
+
+ 2007-04-12 Jonathan Larmour
+ * icmp.c: Reset IP header TTL in ICMP ECHO responses (bug #19580).
+
+ 2007-04-12 Kieran Mansley
+ * tcp.c, tcp_in.c, tcp_out.c, tcp.h: Modify way the retransmission
+ timer is reset to fix bug#19434, with help from Oleg Tyshev.
+
+ 2007-04-11 Simon Goldschmidt
+ * etharp.c, pbuf.c, pbuf.h: 3rd fix for bug #11400 (arp-queuing): More pbufs than
+ previously thought need to be copied (everything but PBUF_ROM!). Cleaned up
+ pbuf.c: removed functions no needed any more (by etharp).
+
+ 2007-04-11 Kieran Mansley
+ * inet.c, ip_addr.h, sockets.h, sys.h, tcp.h: Apply patch #5745: Fix
+ "Constant is long" warnings with 16bit compilers. Contributed by
+ avatar@mmlab.cse.yzu.edu.tw
+
+ 2007-04-05 Frédéric Bernon, Jonathan Larmour
+ * api_msg.c: Fix bug #16830: "err_tcp() posts to connection mailbox when no pend on
+ the mailbox is active". Now, the post is only done during a connect, and do_send,
+ do_write and do_join_leave_group don't do anything if a previous error was signaled.
+
+ 2007-04-03 Frédéric Bernon
+ * ip.c: Don't set the IP_DF ("Don't fragment") flag in the IP header in IP output
+ packets. See patch #5834.
+
+ 2007-03-30 Frédéric Bernon
+ * api_msg.c: add a "pcb_new" helper function to avoid redundant code, and to add
+ missing pcb allocations checking (in do_bind, and for each raw_new). Fix style.
+
+ 2007-03-30 Frédéric Bernon
+ * most of files: prefix all debug.h define with "LWIP_" to avoid any conflict with
+ others environment defines (these were too "generic").
+
+ 2007-03-28 Frédéric Bernon
+ * api.h, api_lib.c, sockets.c: netbuf_ref doesn't check its internal pbuf_alloc call
+ result and can cause a crash. lwip_send now check netbuf_ref result.
+
+ 2007-03-28 Simon Goldschmidt
+ * sockets.c Remove "#include <errno.h>" from sockets.c to avoid multiple
+ definition of macros (in errno.h and lwip/arch.h) if LWIP_PROVIDE_ERRNO is
+ defined. This is the way it should have been already (looking at
+ doc/sys_arch.txt)
+
+ 2007-03-28 Kieran Mansley
+ * opt.h Change default PBUF_POOL_BUFSIZE (again) to accomodate default MSS +
+ IP and TCP headers *and* physical link headers
+
+ 2007-03-26 Frédéric Bernon (based on patch from Dmitry Potapov)
+ * api_lib.c: patch for netconn_write(), fixes a possible race condition which cause
+ to send some garbage. It is not a definitive solution, but the patch does solve
+ the problem for most cases.
+
+ 2007-03-22 Frédéric Bernon
+ * api_msg.h, api_msg.c: Remove obsolete API_MSG_ACCEPT and do_accept (never used).
+
+ 2007-03-22 Frédéric Bernon
+ * api_lib.c: somes resources couldn't be freed if there was errors during
+ netconn_new_with_proto_and_callback.
+
+ 2007-03-22 Frédéric Bernon
+ * ethernetif.c: update netif->input calls to check return value. In older ports,
+ it's a good idea to upgrade them, even if before, there could be another problem
+ (access to an uninitialized mailbox).
+
+ 2007-03-21 Simon Goldschmidt
+ * sockets.c: fixed bug #5067 (essentialy a signed/unsigned warning fixed
+ by casting to unsigned).
+
+ 2007-03-21 Frédéric Bernon
+ * api_lib.c, api_msg.c, tcpip.c: integrate sys_mbox_fetch(conn->mbox, NULL) calls from
+ api_lib.c to tcpip.c's tcpip_apimsg(). Now, use a local variable and not a
+ dynamic one from memp to send tcpip_msg to tcpip_thread in a synchrone call.
+ Free tcpip_msg from tcpip_apimsg is not done in tcpip_thread. This give a
+ faster and more reliable communication between api_lib and tcpip.
+
+ 2007-03-21 Frédéric Bernon
+ * opt.h: Add LWIP_NETIF_CALLBACK (to avoid compiler warning) and set it to 0.
+
+ 2007-03-21 Frédéric Bernon
+ * api_msg.c, igmp.c, igmp.h: Fix C++ style comments
+
+ 2007-03-21 Kieran Mansley
+ * opt.h Change default PBUF_POOL_BUFSIZE to accomodate default MSS +
+ IP and TCP headers
+
+ 2007-03-21 Kieran Mansley
+ * Fix all uses of pbuf_header to check the return value. In some
+ cases just assert if it fails as I'm not sure how to fix them, but
+ this is no worse than before when they would carry on regardless
+ of the failure.
+
+ 2007-03-21 Kieran Mansley
+ * sockets.c, igmp.c, igmp.h, memp.h: Fix C++ style comments and
+ comment out missing header include in icmp.c
+
+ 2007-03-20 Frédéric Bernon
+ * memp.h, stats.c: Fix stats_display function where memp_names table wasn't
+ synchronized with memp.h.
+
+ 2007-03-20 Frédéric Bernon
+ * tcpip.c: Initialize tcpip's mbox, and verify if initialized in tcpip_input,
+ tcpip_ethinput, tcpip_callback, tcpip_apimsg, to fix a init problem with
+ network interfaces. Also fix a compiler warning.
+
+ 2007-03-20 Kieran Mansley
+ * udp.c: Only try and use pbuf_header() to make space for headers if
+ not a ROM or REF pbuf.
+
+ 2007-03-19 Frédéric Bernon
+ * api_msg.h, api_msg.c, tcpip.h, tcpip.c: Add return types to tcpip_apimsg()
+ and api_msg_post().
+
+ 2007-03-19 Frédéric Bernon
+ * Remove unimplemented "memp_realloc" function from memp.h.
+
+ 2007-03-11 Simon Goldschmidt
+ * pbuf.c: checked in patch #5796: pbuf_alloc: len field claculation caused
+ memory corruption.
+
+ 2007-03-11 Simon Goldschmidt (based on patch from Dmitry Potapov)
+ * api_lib.c, sockets.c, api.h, api_msg.h, sockets.h: Fixed bug #19251
+ (missing `const' qualifier in socket functions), to get more compatible to
+ standard POSIX sockets.
+
+ 2007-03-11 Frédéric Bernon (based on patch from Dmitry Potapov)
+ * sockets.c: Add asserts inside bind, connect and sendto to check input
+ parameters. Remove excessive set_errno() calls after get_socket(), because
+ errno is set inside of get_socket(). Move last sock_set_errno() inside
+ lwip_close.
+
+ 2007-03-09 Simon Goldschmidt
+ * memp.c: Fixed bug #11400: New etharp queueing introduced bug: memp_memory
+ was allocated too small.
+
+ 2007-03-06 Simon Goldschmidt
+ * tcpip.c: Initialize dhcp timers in tcpip_thread (if LWIP_DHCP) to protect
+ the stack from concurrent access.
+
+ 2007-03-06 Frédéric Bernon, Dmitry Potapov
+ * tcpip.c, ip_frag.c, ethernetif.c: Fix some build problems, and a redundancy
+ call to "lwip_stats.link.recv++;" in low_level_input() & ethernetif_input().
+
+ 2007-03-06 Simon Goldschmidt
+ * ip_frag.c, ip_frag.h: Reduce code size: don't include code in those files
+ if IP_FRAG == 0 and IP_REASSEMBLY == 0
+
+ 2007-03-06 Frédéric Bernon, Simon Goldschmidt
+ * opt.h, ip_frag.h, tcpip.h, tcpip.c, ethernetif.c: add new configuration
+ option named ETHARP_TCPIP_ETHINPUT, which enable the new tcpip_ethinput.
+ Allow to do ARP processing for incoming packets inside tcpip_thread
+ (protecting ARP layer against concurrent access). You can also disable
+ old code using tcp_input with new define ETHARP_TCPIP_INPUT set to 0.
+ Older ports have to use tcpip_ethinput.
+
+ 2007-03-06 Simon Goldschmidt (based on patch from Dmitry Potapov)
+ * err.h, err.c: fixed compiler warning "initialization dircards qualifiers
+ from pointer target type"
+
+ 2007-03-05 Frédéric Bernon
+ * opt.h, sockets.h: add new configuration options (LWIP_POSIX_SOCKETS_IO_NAMES,
+ ETHARP_TRUST_IP_MAC, review SO_REUSE)
+
+ 2007-03-04 Frédéric Bernon
+ * api_msg.c: Remove some compiler warnings : parameter "pcb" was never
+ referenced.
+
+ 2007-03-04 Frédéric Bernon
+ * api_lib.c: Fix "[patch #5764] api_lib.c cleanup: after patch #5687" (from
+ Dmitry Potapov).
+ The api_msg struct stay on the stack (not moved to netconn struct).
+
+ 2007-03-04 Simon Goldschmidt (based on patch from Dmitry Potapov)
+ * pbuf.c: Fix BUG#19168 - pbuf_free can cause deadlock (if
+ SYS_LIGHTWEIGHT_PROT=1 & freeing PBUF_RAM when mem_sem is not available)
+ Also fixed cast warning in pbuf_alloc()
+
+ 2007-03-04 Simon Goldschmidt
+ * etharp.c, etharp.h, memp.c, memp.h, opt.h: Fix BUG#11400 - don't corrupt
+ existing pbuf chain when enqueuing multiple pbufs to a pending ARP request
+
+ 2007-03-03 Frédéric Bernon
+ * udp.c: remove obsolete line "static struct udp_pcb *pcb_cache = NULL;"
+ It is static, and never used in udp.c except udp_init().
+
+ 2007-03-02 Simon Goldschmidt
+ * tcpip.c: Moved call to ip_init(), udp_init() and tcp_init() from
+ tcpip_thread() to tcpip_init(). This way, raw API connections can be
+ initialized before tcpip_thread is running (e.g. before OS is started)
+
+ 2007-03-02 Frédéric Bernon
+ * rawapi.txt: Fix documentation mismatch with etharp.h about etharp_tmr's call
+ interval.
+
+ 2007-02-28 Kieran Mansley
+ * pbuf.c: Fix BUG#17645 - ensure pbuf payload pointer is not moved
+ outside the region of the pbuf by pbuf_header()
+
+ 2007-02-28 Kieran Mansley
+ * sockets.c: Fix BUG#19161 - ensure milliseconds timeout is non-zero
+ when supplied timeout is also non-zero
+
+(STABLE-1.2.0)
+
+ 2006-12-05 Leon Woestenberg
+ * CHANGELOG: Mention STABLE-1.2.0 release.
+
+ ++ New features:
+
+ 2006-12-01 Christiaan Simons
+ * mem.h, opt.h: Added MEM_LIBC_MALLOC option.
+ Note this is a workaround. Currently I have no other options left.
+
+ 2006-10-26 Christiaan Simons (accepted patch by Jonathan Larmour)
+ * ipv4/ip_frag.c: rename MAX_MTU to IP_FRAG_MAX_MTU and move define
+ to include/lwip/opt.h.
+ * ipv4/lwip/ip_frag.h: Remove unused IP_REASS_INTERVAL.
+ Move IP_REASS_MAXAGE and IP_REASS_BUFSIZE to include/lwip/opt.h.
+ * opt.h: Add above new options.
+
+ 2006-08-18 Christiaan Simons
+ * tcp_{in,out}.c: added SNMP counters.
+ * ipv4/ip.c: added SNMP counters.
+ * ipv4/ip_frag.c: added SNMP counters.
+
+ 2006-08-08 Christiaan Simons
+ * etharp.{c,h}: added etharp_find_addr() to read
+ (stable) ethernet/IP address pair from ARP table
+
+ 2006-07-14 Christiaan Simons
+ * mib_structs.c: added
+ * include/lwip/snmp_structs.h: added
+ * netif.{c,h}, netif/ethernetif.c: added SNMP statistics to netif struct
+
+ 2006-07-06 Christiaan Simons
+ * snmp/asn1_{enc,dec}.c added
+ * snmp/mib2.c added
+ * snmp/msg_{in,out}.c added
+ * include/lwip/snmp_asn1.h added
+ * include/lwip/snmp_msg.h added
+ * doc/snmp_agent.txt added
+
+ 2006-03-29 Christiaan Simons
+ * inet.c, inet.h: Added platform byteswap support.
+ Added LWIP_PLATFORM_BYTESWAP define (defaults to 0) and
+ optional LWIP_PLATFORM_HTONS(), LWIP_PLATFORM_HTONL() macros.
+
+ ++ Bug fixes:
+
+ 2006-11-30 Christiaan Simons
+ * dhcp.c: Fixed false triggers of request_timeout.
+
+ 2006-11-28 Christiaan Simons
+ * netif.c: In netif_add() fixed missing clear of ip_addr, netmask, gw and flags.
+
+ 2006-10-11 Christiaan Simons
+ * api_lib.c etharp.c, ip.c, memp.c, stats.c, sys.{c,h} tcp.h:
+ Partially accepted patch #5449 for ANSI C compatibility / build fixes.
+ * ipv4/lwip/ip.h ipv6/lwip/ip.h: Corrected UDP-Lite protocol
+ identifier from 170 to 136 (bug #17574).
+
+ 2006-10-10 Christiaan Simons
+ * api_msg.c: Fixed Nagle algorithm as reported by Bob Grice.
+
+ 2006-08-17 Christiaan Simons
+ * udp.c: Fixed bug #17200, added check for broadcast
+ destinations for PCBs bound to a unicast address.
+
+ 2006-08-07 Christiaan Simons
+ * api_msg.c: Flushing TCP output in do_close() (bug #15926).
+
+ 2006-06-27 Christiaan Simons
+ * api_msg.c: Applied patch for cold case (bug #11135).
+ In accept_function() ensure newconn->callback is always initialized.
+
+ 2006-06-15 Christiaan Simons
+ * mem.h: added MEM_SIZE_F alias to fix an ancient cold case (bug #1748),
+ facilitate printing of mem_size_t and u16_t statistics.
+
+ 2006-06-14 Christiaan Simons
+ * api_msg.c: Applied patch #5146 to handle allocation failures
+ in accept() by Kevin Lawson.
+
+ 2006-05-26 Christiaan Simons
+ * api_lib.c: Removed conn->sem creation and destruction
+ from netconn_write() and added sys_sem_new to netconn_new_*.
+
+(STABLE-1_1_1)
+
+ 2006-03-03 Christiaan Simons
+ * ipv4/ip_frag.c: Added bound-checking assertions on ip_reassbitmap
+ access and added pbuf_alloc() return value checks.
+
+ 2006-01-01 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * tcp_{in,out}.c, tcp_out.c: Removed 'even sndbuf' fix in TCP, which is
+ now handled by the checksum routine properly.
+
+ 2006-02-27 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * pbuf.c: Fix alignment; pbuf_init() would not work unless
+ pbuf_pool_memory[] was properly aligned. (Patch by Curt McDowell.)
+
+ 2005-12-20 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * tcp.c: Remove PCBs which stay in LAST_ACK state too long. Patch
+ submitted by Mitrani Hiroshi.
+
+ 2005-12-15 Christiaan Simons
+ * inet.c: Disabled the added summing routine to preserve code space.
+
+ 2005-12-14 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * tcp_in.c: Duplicate FIN ACK race condition fix by Kelvin Lawson.
+ Added Curt McDowell's optimized checksumming routine for future
+ inclusion. Need to create test case for unaliged, aligned, odd,
+ even length combination of cases on various endianess machines.
+
+ 2005-12-09 Christiaan Simons
+ * inet.c: Rewrote standard checksum routine in proper portable C.
+
+ 2005-11-25 Christiaan Simons
+ * udp.c tcp.c: Removed SO_REUSE hack. Should reside in socket code only.
+ * *.c: introduced cc.h LWIP_DEBUG formatters matching the u16_t, s16_t,
+ u32_t, s32_t typedefs. This solves most debug word-length assumes.
+
+ 2005-07-17 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * inet.c: Fixed unaligned 16-bit access in the standard checksum
+ routine by Peter Jolasson.
+ * slipif.c: Fixed implementation assumption of single-pbuf datagrams.
+
+ 2005-02-04 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * tcp_out.c: Fixed uninitialized 'queue' referenced in memerr branch.
+ * tcp_{out|in}.c: Applied patch fixing unaligned access.
+
+ 2005-01-04 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * pbuf.c: Fixed missing semicolon after LWIP_DEBUG statement.
+
+ 2005-01-03 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * udp.c: UDP pcb->recv() was called even when it was NULL.
+
+(STABLE-1_1_0)
+
+ 2004-12-28 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * etharp.*: Disabled multiple packets on the ARP queue.
+ This clashes with TCP queueing.
+
+ 2004-11-28 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * etharp.*: Fixed race condition from ARP request to ARP timeout.
+ Halved the ARP period, doubled the period counts.
+ ETHARP_MAX_PENDING now should be at least 2. This prevents
+ the counter from reaching 0 right away (which would allow
+ too little time for ARP responses to be received).
+
+ 2004-11-25 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * dhcp.c: Decline messages were not multicast but unicast.
+ * etharp.c: ETHARP_CREATE is renamed to ETHARP_TRY_HARD.
+ Do not try hard to insert arbitrary packet's source address,
+ etharp_ip_input() now calls etharp_update() without ETHARP_TRY_HARD.
+ etharp_query() now always DOES call ETHARP_TRY_HARD so that users
+ querying an address will see it appear in the cache (DHCP could
+ suffer from this when a server invalidly gave an in-use address.)
+ * ipv4/ip_addr.h: Renamed ip_addr_maskcmp() to _netcmp() as we are
+ comparing network addresses (identifiers), not the network masks
+ themselves.
+ * ipv4/ip_addr.c: ip_addr_isbroadcast() now checks that the given
+ IP address actually belongs to the network of the given interface.
+
+ 2004-11-24 Kieran Mansley <kjm25@cam.ac.uk>
+ * tcp.c: Increment pcb->snd_buf when ACK is received in SYN_SENT state.
+
+(STABLE-1_1_0-RC1)
+
+ 2004-10-16 Kieran Mansley <kjm25@cam.ac.uk>
+ * tcp.c: Add code to tcp_recved() to send an ACK (window update) immediately,
+ even if one is already pending, if the rcv_wnd is above a threshold
+ (currently TCP_WND/2). This avoids waiting for a timer to expire to send a
+ delayed ACK in order to open the window if the stack is only receiving data.
+
+ 2004-09-12 Kieran Mansley <kjm25@cam.ac.uk>
+ * tcp*.*: Retransmit time-out handling improvement by Sam Jansen.
+
+ 2004-08-20 Tony Mountifield <tony@softins.co.uk>
+ * etharp.c: Make sure the first pbuf queued on an ARP entry
+ is properly ref counted.
+
+ 2004-07-27 Tony Mountifield <tony@softins.co.uk>
+ * debug.h: Added (int) cast in LWIP_DEBUGF() to avoid compiler
+ warnings about comparison.
+ * pbuf.c: Stopped compiler complaining of empty if statement
+ when LWIP_DEBUGF() empty. Closed an unclosed comment.
+ * tcp.c: Stopped compiler complaining of empty if statement
+ when LWIP_DEBUGF() empty.
+ * ip.h Corrected IPH_TOS() macro: returns a byte, so doesn't need htons().
+ * inet.c: Added a couple of casts to quiet the compiler.
+ No need to test isascii(c) before isdigit(c) or isxdigit(c).
+
+ 2004-07-22 Tony Mountifield <tony@softins.co.uk>
+ * inet.c: Made data types consistent in inet_ntoa().
+ Added casts for return values of checksum routines, to pacify compiler.
+ * ip_frag.c, tcp_out.c, sockets.c, pbuf.c
+ Small corrections to some debugging statements, to pacify compiler.
+
+ 2004-07-21 Tony Mountifield <tony@softins.co.uk>
+ * etharp.c: Removed spurious semicolon and added missing end-of-comment.
+ * ethernetif.c Updated low_level_output() to match prototype for
+ netif->linkoutput and changed low_level_input() similarly for consistency.
+ * api_msg.c: Changed recv_raw() from int to u8_t, to match prototype
+ of raw_recv() in raw.h and so avoid compiler error.
+ * sockets.c: Added trivial (int) cast to keep compiler happier.
+ * ip.c, netif.c Changed debug statements to use the tidier ip4_addrN() macros.
+
+(STABLE-1_0_0)
+
+ ++ Changes:
+
+ 2004-07-05 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * sockets.*: Restructured LWIP_PRIVATE_TIMEVAL. Make sure
+ your cc.h file defines this either 1 or 0. If non-defined,
+ defaults to 1.
+ * .c: Added <string.h> and <errno.h> includes where used.
+ * etharp.c: Made some array indices unsigned.
+
+ 2004-06-27 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * netif.*: Added netif_set_up()/down().
+ * dhcp.c: Changes to restart program flow.
+
+ 2004-05-07 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * etharp.c: In find_entry(), instead of a list traversal per candidate, do a
+ single-pass lookup for different candidates. Should exploit locality.
+
+ 2004-04-29 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * tcp*.c: Cleaned up source comment documentation for Doxygen processing.
+ * opt.h: ETHARP_ALWAYS_INSERT option removed to comply with ARP RFC.
+ * etharp.c: update_arp_entry() only adds new ARP entries when adviced to by
+ the caller. This deprecates the ETHARP_ALWAYS_INSERT overrule option.
+
+ ++ Bug fixes:
+
+ 2004-04-27 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * etharp.c: Applied patch of bug #8708 by Toni Mountifield with a solution
+ suggested by Timmy Brolin. Fix for 32-bit processors that cannot access
+ non-aligned 32-bit words, such as soms 32-bit TCP/IP header fields. Fix
+ is to prefix the 14-bit Ethernet headers with two padding bytes.
+
+ 2004-04-23 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * ip_addr.c: Fix in the ip_addr_isbroadcast() check.
+ * etharp.c: Fixed the case where the packet that initiates the ARP request
+ is not queued, and gets lost. Fixed the case where the packets destination
+ address is already known; we now always queue the packet and perform an ARP
+ request.
+
+(STABLE-0_7_0)
+
+ ++ Bug fixes:
+
+ * Fixed TCP bug for SYN_SENT to ESTABLISHED state transition.
+ * Fixed TCP bug in dequeueing of FIN from out of order segment queue.
+ * Fixed two possible NULL references in rare cases.
+
+(STABLE-0_6_6)
+
+ ++ Bug fixes:
+
+ * Fixed DHCP which did not include the IP address in DECLINE messages.
+
+ ++ Changes:
+
+ * etharp.c has been hauled over a bit.
+
+(STABLE-0_6_5)
+
+ ++ Bug fixes:
+
+ * Fixed TCP bug induced by bad window resizing with unidirectional TCP traffic.
+ * Packets sent from ARP queue had invalid source hardware address.
+
+ ++ Changes:
+
+ * Pass-by ARP requests do now update the cache.
+
+ ++ New features:
+
+ * No longer dependent on ctype.h.
+ * New socket options.
+ * Raw IP pcb support.
+
+(STABLE-0_6_4)
+
+ ++ Bug fixes:
+
+ * Some debug formatters and casts fixed.
+ * Numereous fixes in PPP.
+
+ ++ Changes:
+
+ * DEBUGF now is LWIP_DEBUGF
+ * pbuf_dechain() has been re-enabled.
+ * Mentioned the changed use of CVS branches in README.
+
+(STABLE-0_6_3)
+
+ ++ Bug fixes:
+
+ * Fixed pool pbuf memory leak in pbuf_alloc().
+ Occured if not enough PBUF_POOL pbufs for a packet pbuf chain.
+ Reported by Savin Zlobec.
+
+ * PBUF_POOL chains had their tot_len field not set for non-first
+ pbufs. Fixed in pbuf_alloc().
+
+ ++ New features:
+
+ * Added PPP stack contributed by Marc Boucher
+
+ ++ Changes:
+
+ * Now drops short packets for ICMP/UDP/TCP protocols. More robust.
+
+ * ARP queueuing now queues the latest packet instead of the first.
+ This is the RFC recommended behaviour, but can be overridden in
+ lwipopts.h.
+
+(0.6.2)
+
+ ++ Bugfixes:
+
+ * TCP has been fixed to deal with the new use of the pbuf->ref
+ counter.
+
+ * DHCP dhcp_inform() crash bug fixed.
+
+ ++ Changes:
+
+ * Removed pbuf_pool_free_cache and pbuf_pool_alloc_cache. Also removed
+ pbuf_refresh(). This has sped up pbuf pool operations considerably.
+ Implemented by David Haas.
+
+(0.6.1)
+
+ ++ New features:
+
+ * The packet buffer implementation has been enhanced to support
+ zero-copy and copy-on-demand for packet buffers which have their
+ payloads in application-managed memory.
+ Implemented by David Haas.
+
+ Use PBUF_REF to make a pbuf refer to RAM. lwIP will use zero-copy
+ if an outgoing packet can be directly sent on the link, or perform
+ a copy-on-demand when necessary.
+
+ The application can safely assume the packet is sent, and the RAM
+ is available to the application directly after calling udp_send()
+ or similar function.
+
+ ++ Bugfixes:
+
+ * ARP_QUEUEING should now correctly work for all cases, including
+ PBUF_REF.
+ Implemented by Leon Woestenberg.
+
+ ++ Changes:
+
+ * IP_ADDR_ANY is no longer a NULL pointer. Instead, it is a pointer
+ to a '0.0.0.0' IP address.
+
+ * The packet buffer implementation is changed. The pbuf->ref counter
+ meaning has changed, and several pbuf functions have been
+ adapted accordingly.
+
+ * netif drivers have to be changed to set the hardware address length field
+ that must be initialized correctly by the driver (hint: 6 for Ethernet MAC).
+ See the contrib/ports/c16x cs8900 driver as a driver example.
+
+ * netif's have a dhcp field that must be initialized to NULL by the driver.
+ See the contrib/ports/c16x cs8900 driver as a driver example.
+
+(0.5.x) This file has been unmaintained up to 0.6.1. All changes are
+ logged in CVS but have not been explained here.
+
+(0.5.3) Changes since version 0.5.2
+
+ ++ Bugfixes:
+
+ * memp_malloc(MEMP_API_MSG) could fail with multiple application
+ threads because it wasn't protected by semaphores.
+
+ ++ Other changes:
+
+ * struct ip_addr now packed.
+
+ * The name of the time variable in arp.c has been changed to ctime
+ to avoid conflicts with the time() function.
+
+(0.5.2) Changes since version 0.5.1
+
+ ++ New features:
+
+ * A new TCP function, tcp_tmr(), now handles both TCP timers.
+
+ ++ Bugfixes:
+
+ * A bug in tcp_parseopt() could cause the stack to hang because of a
+ malformed TCP option.
+
+ * The address of new connections in the accept() function in the BSD
+ socket library was not handled correctly.
+
+ * pbuf_dechain() did not update the ->tot_len field of the tail.
+
+ * Aborted TCP connections were not handled correctly in all
+ situations.
+
+ ++ Other changes:
+
+ * All protocol header structs are now packed.
+
+ * The ->len field in the tcp_seg structure now counts the actual
+ amount of data, and does not add one for SYN and FIN segments.
+
+(0.5.1) Changes since version 0.5.0
+
+ ++ New features:
+
+ * Possible to run as a user process under Linux.
+
+ * Preliminary support for cross platform packed structs.
+
+ * ARP timer now implemented.
+
+ ++ Bugfixes:
+
+ * TCP output queue length was badly initialized when opening
+ connections.
+
+ * TCP delayed ACKs were not sent correctly.
+
+ * Explicit initialization of BSS segment variables.
+
+ * read() in BSD socket library could drop data.
+
+ * Problems with memory alignment.
+
+ * Situations when all TCP buffers were used could lead to
+ starvation.
+
+ * TCP MSS option wasn't parsed correctly.
+
+ * Problems with UDP checksum calculation.
+
+ * IP multicast address tests had endianess problems.
+
+ * ARP requests had wrong destination hardware address.
+
+ ++ Other changes:
+
+ * struct eth_addr changed from u16_t[3] array to u8_t[6].
+
+ * A ->linkoutput() member was added to struct netif.
+
+ * TCP and UDP ->dest_* struct members where changed to ->remote_*.
+
+ * ntoh* macros are now null definitions for big endian CPUs.
+
+(0.5.0) Changes since version 0.4.2
+
+ ++ New features:
+
+ * Redesigned operating system emulation layer to make porting easier.
+
+ * Better control over TCP output buffers.
+
+ * Documenation added.
+
+ ++ Bugfixes:
+
+ * Locking issues in buffer management.
+
+ * Bugfixes in the sequential API.
+
+ * IP forwarding could cause memory leakage. This has been fixed.
+
+ ++ Other changes:
+
+ * Directory structure somewhat changed; the core/ tree has been
+ collapsed.
+
+(0.4.2) Changes since version 0.4.1
+
+ ++ New features:
+
+ * Experimental ARP implementation added.
+
+ * Skeleton Ethernet driver added.
+
+ * Experimental BSD socket API library added.
+
+ ++ Bugfixes:
+
+ * In very intense situations, memory leakage could occur. This has
+ been fixed.
+
+ ++ Other changes:
+
+ * Variables named "data" and "code" have been renamed in order to
+ avoid name conflicts in certain compilers.
+
+ * Variable++ have in appliciable cases been translated to ++variable
+ since some compilers generate better code in the latter case.
+
+(0.4.1) Changes since version 0.4
+
+ ++ New features:
+
+ * TCP: Connection attempts time out earlier than data
+ transmissions. Nagle algorithm implemented. Push flag set on the
+ last segment in a burst.
+
+ * UDP: experimental support for UDP-Lite extensions.
+
+ ++ Bugfixes:
+
+ * TCP: out of order segments were in some cases handled incorrectly,
+ and this has now been fixed. Delayed acknowledgements was broken
+ in 0.4, has now been fixed. Binding to an address that is in use
+ now results in an error. Reset connections sometimes hung an
+ application; this has been fixed.
+
+ * Checksum calculation sometimes failed for chained pbufs with odd
+ lengths. This has been fixed.
+
+ * API: a lot of bug fixes in the API. The UDP API has been improved
+ and tested. Error reporting and handling has been
+ improved. Logical flaws and race conditions for incoming TCP
+ connections has been found and removed.
+
+ * Memory manager: alignment issues. Reallocating memory sometimes
+ failed, this has been fixed.
+
+ * Generic library: bcopy was flawed and has been fixed.
+
+ ++ Other changes:
+
+ * API: all datatypes has been changed from generic ones such as
+ ints, to specified ones such as u16_t. Functions that return
+ errors now have the correct type (err_t).
+
+ * General: A lot of code cleaned up and debugging code removed. Many
+ portability issues have been fixed.
+
+ * The license was changed; the advertising clause was removed.
+
+ * C64 port added.
+
+ * Thanks: Huge thanks go to Dagan Galarneau, Horst Garnetzke, Petri
+ Kosunen, Mikael Caleres, and Frits Wilmink for reporting and
+ fixing bugs!
+
+(0.4) Changes since version 0.3.1
+
+ * Memory management has been radically changed; instead of
+ allocating memory from a shared heap, memory for objects that are
+ rapidly allocated and deallocated is now kept in pools. Allocation
+ and deallocation from those memory pools is very fast. The shared
+ heap is still present but is used less frequently.
+
+ * The memory, memory pool, and packet buffer subsystems now support
+ 4-, 2-, or 1-byte alignment.
+
+ * "Out of memory" situations are handled in a more robust way.
+
+ * Stack usage has been reduced.
+
+ * Easier configuration of lwIP parameters such as memory usage,
+ TTLs, statistics gathering, etc. All configuration parameters are
+ now kept in a single header file "lwipopts.h".
+
+ * The directory structure has been changed slightly so that all
+ architecture specific files are kept under the src/arch
+ hierarchy.
+
+ * Error propagation has been improved, both in the protocol modules
+ and in the API.
+
+ * The code for the RTXC architecture has been implemented, tested
+ and put to use.
+
+ * Bugs have been found and corrected in the TCP, UDP, IP, API, and
+ the Internet checksum modules.
+
+ * Bugs related to porting between a 32-bit and a 16-bit architecture
+ have been found and corrected.
+
+ * The license has been changed slightly to conform more with the
+ original BSD license, including the advertisement clause.
+
+(0.3.1) Changes since version 0.3
+
+ * Fix of a fatal bug in the buffer management. Pbufs with allocated
+ RAM never returned the RAM when the pbuf was deallocated.
+
+ * TCP congestion control, window updates and retransmissions did not
+ work correctly. This has now been fixed.
+
+ * Bugfixes in the API.
+
+(0.3) Changes since version 0.2
+
+ * New and improved directory structure. All include files are now
+ kept in a dedicated include/ directory.
+
+ * The API now has proper error handling. A new function,
+ netconn_err(), now returns an error code for the connection in
+ case of errors.
+
+ * Improvements in the memory management subsystem. The system now
+ keeps a pointer to the lowest free memory block. A new function,
+ mem_malloc2() tries to allocate memory once, and if it fails tries
+ to free some memory and retry the allocation.
+
+ * Much testing has been done with limited memory
+ configurations. lwIP now does a better job when overloaded.
+
+ * Some bugfixes and improvements to the buffer (pbuf) subsystem.
+
+ * Many bugfixes in the TCP code:
+
+ - Fixed a bug in tcp_close().
+
+ - The TCP receive window was incorrectly closed when out of
+ sequence segments was received. This has been fixed.
+
+ - Connections are now timed-out of the FIN-WAIT-2 state.
+
+ - The initial congestion window could in some cases be too
+ large. This has been fixed.
+
+ - The retransmission queue could in some cases be screwed up. This
+ has been fixed.
+
+ - TCP RST flag now handled correctly.
+
+ - Out of sequence data was in some cases never delivered to the
+ application. This has been fixed.
+
+ - Retransmitted segments now contain the correct acknowledgment
+ number and advertised window.
+
+ - TCP retransmission timeout backoffs are not correctly computed
+ (ala BSD). After a number of retransmissions, TCP now gives up
+ the connection.
+
+ * TCP connections now are kept on three lists, one for active
+ connections, one for listening connections, and one for
+ connections that are in TIME-WAIT. This greatly speeds up the fast
+ timeout processing for sending delayed ACKs.
+
+ * TCP now provides proper feedback to the application when a
+ connection has been successfully set up.
+
+ * More comments have been added to the code. The code has also been
+ somewhat cleaned up.
+
+(0.2) Initial public release.
diff --git a/lwip/COPYING b/lwip/COPYING
new file mode 100644
index 0000000..e23898b
--- /dev/null
+++ b/lwip/COPYING
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+
diff --git a/lwip/FILES b/lwip/FILES
new file mode 100644
index 0000000..6625319
--- /dev/null
+++ b/lwip/FILES
@@ -0,0 +1,4 @@
+src/ - The source code for the lwIP TCP/IP stack.
+doc/ - The documentation for lwIP.
+
+See also the FILES file in each subdirectory.
diff --git a/lwip/README b/lwip/README
new file mode 100644
index 0000000..a62cc4f
--- /dev/null
+++ b/lwip/README
@@ -0,0 +1,89 @@
+INTRODUCTION
+
+lwIP is a small independent implementation of the TCP/IP protocol
+suite that has been developed by Adam Dunkels at the Computer and
+Networks Architectures (CNA) lab at the Swedish Institute of Computer
+Science (SICS).
+
+The focus of the lwIP TCP/IP implementation is to reduce the RAM usage
+while still having a full scale TCP. This making lwIP suitable for use
+in embedded systems with tens of kilobytes of free RAM and room for
+around 40 kilobytes of code ROM.
+
+FEATURES
+
+ * IP (Internet Protocol) including packet forwarding over multiple network
+ interfaces
+ * ICMP (Internet Control Message Protocol) for network maintenance and debugging
+ * IGMP (Internet Group Management Protocol) for multicast traffic management
+ * UDP (User Datagram Protocol) including experimental UDP-lite extensions
+ * TCP (Transmission Control Protocol) with congestion control, RTT estimation
+ and fast recovery/fast retransmit
+ * Specialized raw/native API for enhanced performance
+ * Optional Berkeley-like socket API
+ * DNS (Domain names resolver)
+ * SNMP (Simple Network Management Protocol)
+ * DHCP (Dynamic Host Configuration Protocol)
+ * AUTOIP (for IPv4, conform with RFC 3927)
+ * PPP (Point-to-Point Protocol)
+ * ARP (Address Resolution Protocol) for Ethernet
+
+LICENSE
+
+lwIP is freely available under a BSD license.
+
+DEVELOPMENT
+
+lwIP has grown into an excellent TCP/IP stack for embedded devices,
+and developers using the stack often submit bug fixes, improvements,
+and additions to the stack to further increase its usefulness.
+
+Development of lwIP is hosted on Savannah, a central point for
+software development, maintenance and distribution. Everyone can
+help improve lwIP by use of Savannah's interface, CVS and the
+mailing list. A core team of developers will commit changes to the
+CVS source tree.
+
+The lwIP TCP/IP stack is maintained in the 'lwip' CVS module and
+contributions (such as platform ports) are in the 'contrib' module.
+
+See doc/savannah.txt for details on CVS server access for users and
+developers.
+
+Last night's CVS tar ball can be downloaded from:
+ http://savannah.gnu.org/cvs.backups/lwip.tar.gz [CHANGED - NEEDS FIXING]
+
+The current CVS trees are web-browsable:
+ http://savannah.nongnu.org/cgi-bin/viewcvs/lwip/lwip/
+ http://savannah.nongnu.org/cgi-bin/viewcvs/lwip/contrib/
+
+Submit patches and bugs via the lwIP project page:
+ http://savannah.nongnu.org/projects/lwip/
+
+
+DOCUMENTATION
+
+The original out-dated homepage of lwIP and Adam Dunkels' papers on
+lwIP are at the official lwIP home page:
+ http://www.sics.se/~adam/lwip/
+
+Self documentation of the source code is regularly extracted from the
+current CVS sources and is available from this web page:
+ http://www.nongnu.org/lwip/
+
+There is now a constantly growin wiki about lwIP at
+ http://lwip.wikia.com/wiki/LwIP_Wiki
+
+Also, there are mailing lists you can subscribe at
+ http://savannah.nongnu.org/mail/?group=lwip
+plus searchable archives:
+ http://lists.nongnu.org/archive/html/lwip-users/
+ http://lists.nongnu.org/archive/html/lwip-devel/
+
+Reading Adam's papers, the files in docs/, browsing the source code
+documentation and browsing the mailing list archives is a good way to
+become familiar with the design of lwIP.
+
+Adam Dunkels <adam@sics.se>
+Leon Woestenberg <leon.woestenberg@gmx.net>
+
diff --git a/lwip/UPGRADING b/lwip/UPGRADING
new file mode 100644
index 0000000..6501107
--- /dev/null
+++ b/lwip/UPGRADING
@@ -0,0 +1,144 @@
+This file lists major changes between release versions that require
+ports or applications to be changed. Use it to update a port or an
+application written for an older version of lwIP to correctly work
+with newer versions.
+
+
+(CVS HEAD)
+
+ * [Enter new changes just after this line - do not remove this line]
+
+ ++ Application changes:
+
+ * Replaced struct ip_addr by typedef ip_addr_t (struct ip_addr is kept for
+ compatibility to old applications, but will be removed in the future).
+
+ * Renamed mem_realloc() to mem_trim() to prevent confusion with realloc()
+
+ +++ Raw API:
+ * Changed the semantics of tcp_close() (since it was rather a
+ shutdown before): Now the application does *NOT* get any calls to the recv
+ callback (aside from NULL/closed) after calling tcp_close()
+
+ * When calling tcp_abort() from a raw API TCP callback function,
+ make sure you return ERR_ABRT to prevent accessing unallocated memory.
+ (ERR_ABRT now means the applicaiton has called tcp_abort!)
+
+ +++ Netconn API:
+ * Changed netconn_receive() and netconn_accept() to return
+ err_t, not a pointer to new data/netconn.
+
+ +++ Socket API:
+ * LWIP_SO_RCVTIMEO: when accept() or recv() time out, they
+ now set errno to EWOULDBLOCK/EAGAIN, not ETIMEDOUT.
+
+ * Added a minimal version of posix fctl() to have a
+ standardised way to set O_NONBLOCK for nonblocking sockets.
+
+ +++ all APIs:
+ * correctly implemented SO(F)_REUSEADDR
+
+ ++ Port changes
+
+ +++ new files:
+
+ * Added 4 new files: def.c, timers.c, timers.h, tcp_impl.h:
+
+ * Moved stack-internal parts of tcp.h to tcp_impl.h, tcp.h now only contains
+ the actual application programmer's API
+
+ * Separated timer implementation from sys.h/.c, moved to timers.h/.c;
+ Added timer implementation for NO_SYS==1, set NO_SYS_NO_TIMERS==1 if you
+ still want to use your own timer implementation for NO_SYS==0 (as before).
+
+ +++ sys layer:
+
+ * Converted mbox- and semaphore-functions to take pointers to sys_mbox_t/
+ sys_sem_t;
+
+ * Converted sys_mbox_new/sys_sem_new to take pointers and return err_t;
+
+ * Added Mutex concept in sys_arch (define LWIP_COMPAT_MUTEX to let sys.h use
+ binary semaphores instead of mutexes - as before)
+
+ +++ new options:
+
+ * Don't waste memory when chaining segments, added option TCP_OVERSIZE to
+ prevent creating many small pbufs when calling tcp_write with many small
+ blocks of data. Instead, pbufs are allocated larger than needed and the
+ space is used for later calls to tcp_write.
+
+ * Added LWIP_NETIF_TX_SINGLE_PBUF to always copy to try to create single pbufs
+ in tcp_write/udp_send.
+
+ * Added an additional option LWIP_ETHERNET to support ethernet without ARP
+ (necessary for pure PPPoE)
+
+ * Add MEMP_SEPARATE_POOLS to place memory pools in separate arrays. This may
+ be used to place these pools into user-defined memory by using external
+ declaration.
+
+ * Added TCP_SNDQUEUELOWAT corresponding to TCP_SNDLOWAT
+
+ +++ new pools:
+
+ * Netdb uses a memp pool for allocating memory when getaddrinfo() is called,
+ so MEMP_NUM_NETDB has to be set accordingly.
+
+ * DNS_LOCAL_HOSTLIST_IS_DYNAMIC uses a memp pool instead of the heap, so
+ MEMP_NUM_LOCALHOSTLIST has to be set accordingly.
+
+ * Snmp-agent uses a memp pools instead of the heap, so MEMP_NUM_SNMP_* have
+ to be set accordingly.
+
+ * PPPoE uses a MEMP pool instead of the heap, so MEMP_NUM_PPPOE_INTERFACES
+ has to be set accordingly
+
+ * Integrated loopif into netif.c - loopif does not have to be created by the
+ port any more, just define LWIP_HAVE_LOOPIF to 1.
+
+ * Added define LWIP_RAND() for lwip-wide randomization (needs to be defined
+ in cc.h, e.g. used by igmp)
+
+ * Added printf-formatter X8_F to printf u8_t as hex
+
+ * The heap now may be moved to user-defined memory by defining
+ LWIP_RAM_HEAP_POINTER as a void pointer to that memory's address
+
+ * added autoip_set_struct() and dhcp_set_struct() to let autoip and dhcp work
+ with user-allocated structs instead of calling mem_malloc
+
+ * Added const char* name to mem- and memp-stats for easier debugging.
+
+ * Calculate the TCP/UDP checksum while copying to only fetch data once:
+ Define LWIP_CHKSUM_COPY to a memcpy-like function that returns the checksum
+
+ * Added SO_REUSE_RXTOALL to pass received UDP broadcast/multicast packets to
+ more than one pcb.
+
+ * Changed the semantics of ARP_QUEUEING==0: ARP_QUEUEING now cannot be turned
+ off any more, if this is set to 0, only one packet (the most recent one) is
+ queued (like demanded by RFC 1122).
+
+
+ ++ Major bugfixes/improvements
+
+ * Implemented tcp_shutdown() to only shut down one end of a connection
+ * Implemented shutdown() at socket- and netconn-level
+ * Added errorset support to select() + improved select speed overhead
+ * Merged pppd to v2.3.11 (including some backported bugfixes from 2.4.x)
+ * Added timer implementation for NO_SYS==1 (may be disabled with NO_SYS_NO_TIMERS==1
+ * Use macros defined in ip_addr.h to work with IP addresses
+ * Implemented many nonblocking socket/netconn functions
+ * Fixed ARP input processing: only add a new entry if a request was directed as us
+ * mem_realloc() to mem_trim() to prevent confusion with realloc()
+ * Some improvements for AutoIP (don't route/forward link-local addresses, don't break
+ existing connections when assigning a routable address)
+ * Correctly handle remote side overrunning our rcv_wnd in ooseq case
+ * Removed packing from ip_addr_t, the packed version is now only used in protocol headers
+ * Corrected PBUF_POOL_BUFSIZE for ports where ETH_PAD_SIZE > 0
+ * Added support for static ARP table entries
+
+(STABLE-1.3.2)
+
+ * initial version of this file
diff --git a/lwip/doc/FILES b/lwip/doc/FILES
new file mode 100644
index 0000000..05d356f
--- /dev/null
+++ b/lwip/doc/FILES
@@ -0,0 +1,6 @@
+savannah.txt - How to obtain the current development source code.
+contrib.txt - How to contribute to lwIP as a developer.
+rawapi.txt - The documentation for the core API of lwIP.
+ Also provides an overview about the other APIs and multithreading.
+snmp_agent.txt - The documentation for the lwIP SNMP agent.
+sys_arch.txt - The documentation for a system abstraction layer of lwIP.
diff --git a/lwip/doc/contrib.txt b/lwip/doc/contrib.txt
new file mode 100644
index 0000000..39596fc
--- /dev/null
+++ b/lwip/doc/contrib.txt
@@ -0,0 +1,63 @@
+1 Introduction
+
+This document describes some guidelines for people participating
+in lwIP development.
+
+2 How to contribute to lwIP
+
+Here is a short list of suggestions to anybody working with lwIP and
+trying to contribute bug reports, fixes, enhancements, platform ports etc.
+First of all as you may already know lwIP is a volunteer project so feedback
+to fixes or questions might often come late. Hopefully the bug and patch tracking
+features of Savannah help us not lose users' input.
+
+2.1 Source code style:
+
+1. do not use tabs.
+2. indentation is two spaces per level (i.e. per tab).
+3. end debug messages with a trailing newline (\n).
+4. one space between keyword and opening bracket.
+5. no space between function and opening bracket.
+6. one space and no newline before opening curly braces of a block.
+7. closing curly brace on a single line.
+8. spaces surrounding assignment and comparisons.
+9. don't initialize static and/or global variables to zero, the compiler takes care of that.
+10. use current source code style as further reference.
+
+2.2 Source code documentation style:
+
+1. JavaDoc compliant and Doxygen compatible.
+2. Function documentation above functions in .c files, not .h files.
+ (This forces you to synchronize documentation and implementation.)
+3. Use current documentation style as further reference.
+
+2.3 Bug reports and patches:
+
+1. Make sure you are reporting bugs or send patches against the latest
+ sources. (From the latest release and/or the current CVS sources.)
+2. If you think you found a bug make sure it's not already filed in the
+ bugtracker at Savannah.
+3. If you have a fix put the patch on Savannah. If it is a patch that affects
+ both core and arch specific stuff please separate them so that the core can
+ be applied separately while leaving the other patch 'open'. The prefered way
+ is to NOT touch archs you can't test and let maintainers take care of them.
+ This is a good way to see if they are used at all - the same goes for unix
+ netifs except tapif.
+4. Do not file a bug and post a fix to it to the patch area. Either a bug report
+ or a patch will be enough.
+ If you correct an existing bug then attach the patch to the bug rather than creating a new entry in the patch area.
+5. Trivial patches (compiler warning, indentation and spelling fixes or anything obvious which takes a line or two)
+ can go to the lwip-users list. This is still the fastest way of interaction and the list is not so crowded
+ as to allow for loss of fixes. Putting bugs on Savannah and subsequently closing them is too much an overhead
+ for reporting a compiler warning fix.
+6. Patches should be specific to a single change or to related changes.Do not mix bugfixes with spelling and other
+ trivial fixes unless the bugfix is trivial too.Do not reorganize code and rename identifiers in the same patch you
+ change behaviour if not necessary.A patch is easier to read and understand if it's to the point and short than
+ if it's not to the point and long :) so the chances for it to be applied are greater.
+
+2.4 Platform porters:
+
+1. If you have ported lwIP to a platform (an OS, a uC/processor or a combination of these) and
+ you think it could benefit others[1] you might want discuss this on the mailing list. You
+ can also ask for CVS access to submit and maintain your port in the contrib CVS module.
+
\ No newline at end of file
diff --git a/lwip/doc/rawapi.txt b/lwip/doc/rawapi.txt
new file mode 100644
index 0000000..8c19030
--- /dev/null
+++ b/lwip/doc/rawapi.txt
@@ -0,0 +1,511 @@
+Raw TCP/IP interface for lwIP
+
+Authors: Adam Dunkels, Leon Woestenberg, Christiaan Simons
+
+lwIP provides three Application Program's Interfaces (APIs) for programs
+to use for communication with the TCP/IP code:
+* low-level "core" / "callback" or "raw" API.
+* higher-level "sequential" API.
+* BSD-style socket API.
+
+The sequential API provides a way for ordinary, sequential, programs
+to use the lwIP stack. It is quite similar to the BSD socket API. The
+model of execution is based on the blocking open-read-write-close
+paradigm. Since the TCP/IP stack is event based by nature, the TCP/IP
+code and the application program must reside in different execution
+contexts (threads).
+
+The socket API is a compatibility API for existing applications,
+currently it is built on top of the sequential API. It is meant to
+provide all functions needed to run socket API applications running
+on other platforms (e.g. unix / windows etc.). However, due to limitations
+in the specification of this API, there might be incompatibilities
+that require small modifications of existing programs.
+
+** Threading
+
+lwIP started targeting single-threaded environments. When adding multi-
+threading support, instead of making the core thread-safe, another
+approach was chosen: there is one main thread running the lwIP core
+(also known as the "tcpip_thread"). The raw API may only be used from
+this thread! Application threads using the sequential- or socket API
+communicate with this main thread through message passing.
+
+ As such, the list of functions that may be called from
+ other threads or an ISR is very limited! Only functions
+ from these API header files are thread-safe:
+ - api.h
+ - netbuf.h
+ - netdb.h
+ - netifapi.h
+ - sockets.h
+ - sys.h
+
+ Additionaly, memory (de-)allocation functions may be
+ called from multiple threads (not ISR!) with NO_SYS=0
+ since they are protected by SYS_LIGHTWEIGHT_PROT and/or
+ semaphores.
+
+ Only since 1.3.0, if SYS_LIGHTWEIGHT_PROT is set to 1
+ and LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT is set to 1,
+ pbuf_free() may also be called from another thread or
+ an ISR (since only then, mem_free - for PBUF_RAM - may
+ be called from an ISR: otherwise, the HEAP is only
+ protected by semaphores).
+
+
+** The remainder of this document discusses the "raw" API. **
+
+The raw TCP/IP interface allows the application program to integrate
+better with the TCP/IP code. Program execution is event based by
+having callback functions being called from within the TCP/IP
+code. The TCP/IP code and the application program both run in the same
+thread. The sequential API has a much higher overhead and is not very
+well suited for small systems since it forces a multithreaded paradigm
+on the application.
+
+The raw TCP/IP interface is not only faster in terms of code execution
+time but is also less memory intensive. The drawback is that program
+development is somewhat harder and application programs written for
+the raw TCP/IP interface are more difficult to understand. Still, this
+is the preferred way of writing applications that should be small in
+code size and memory usage.
+
+Both APIs can be used simultaneously by different application
+programs. In fact, the sequential API is implemented as an application
+program using the raw TCP/IP interface.
+
+--- Callbacks
+
+Program execution is driven by callbacks. Each callback is an ordinary
+C function that is called from within the TCP/IP code. Every callback
+function is passed the current TCP or UDP connection state as an
+argument. Also, in order to be able to keep program specific state,
+the callback functions are called with a program specified argument
+that is independent of the TCP/IP state.
+
+The function for setting the application connection state is:
+
+- void tcp_arg(struct tcp_pcb *pcb, void *arg)
+
+ Specifies the program specific state that should be passed to all
+ other callback functions. The "pcb" argument is the current TCP
+ connection control block, and the "arg" argument is the argument
+ that will be passed to the callbacks.
+
+
+--- TCP connection setup
+
+The functions used for setting up connections is similar to that of
+the sequential API and of the BSD socket API. A new TCP connection
+identifier (i.e., a protocol control block - PCB) is created with the
+tcp_new() function. This PCB can then be either set to listen for new
+incoming connections or be explicitly connected to another host.
+
+- struct tcp_pcb *tcp_new(void)
+
+ Creates a new connection identifier (PCB). If memory is not
+ available for creating the new pcb, NULL is returned.
+
+- err_t tcp_bind(struct tcp_pcb *pcb, ip_addr_t *ipaddr,
+ u16_t port)
+
+ Binds the pcb to a local IP address and port number. The IP address
+ can be specified as IP_ADDR_ANY in order to bind the connection to
+ all local IP addresses.
+
+ If another connection is bound to the same port, the function will
+ return ERR_USE, otherwise ERR_OK is returned.
+
+- struct tcp_pcb *tcp_listen(struct tcp_pcb *pcb)
+
+ Commands a pcb to start listening for incoming connections. When an
+ incoming connection is accepted, the function specified with the
+ tcp_accept() function will be called. The pcb will have to be bound
+ to a local port with the tcp_bind() function.
+
+ The tcp_listen() function returns a new connection identifier, and
+ the one passed as an argument to the function will be
+ deallocated. The reason for this behavior is that less memory is
+ needed for a connection that is listening, so tcp_listen() will
+ reclaim the memory needed for the original connection and allocate a
+ new smaller memory block for the listening connection.
+
+ tcp_listen() may return NULL if no memory was available for the
+ listening connection. If so, the memory associated with the pcb
+ passed as an argument to tcp_listen() will not be deallocated.
+
+- struct tcp_pcb *tcp_listen_with_backlog(struct tcp_pcb *pcb, u8_t backlog)
+
+ Same as tcp_listen, but limits the number of outstanding connections
+ in the listen queue to the value specified by the backlog argument.
+ To use it, your need to set TCP_LISTEN_BACKLOG=1 in your lwipopts.h.
+
+- void tcp_accepted(struct tcp_pcb *pcb)
+
+ Inform lwIP that an incoming connection has been accepted. This would
+ usually be called from the accept callback. This allows lwIP to perform
+ housekeeping tasks, such as allowing further incoming connections to be
+ queued in the listen backlog.
+ ATTENTION: the PCB passed in must be the listening pcb, not the pcb passed
+ into the accept callback!
+
+- void tcp_accept(struct tcp_pcb *pcb,
+ err_t (* accept)(void *arg, struct tcp_pcb *newpcb,
+ err_t err))
+
+ Specified the callback function that should be called when a new
+ connection arrives on a listening connection.
+
+- err_t tcp_connect(struct tcp_pcb *pcb, ip_addr_t *ipaddr,
+ u16_t port, err_t (* connected)(void *arg,
+ struct tcp_pcb *tpcb,
+ err_t err));
+
+ Sets up the pcb to connect to the remote host and sends the
+ initial SYN segment which opens the connection.
+
+ The tcp_connect() function returns immediately; it does not wait for
+ the connection to be properly setup. Instead, it will call the
+ function specified as the fourth argument (the "connected" argument)
+ when the connection is established. If the connection could not be
+ properly established, either because the other host refused the
+ connection or because the other host didn't answer, the "err"
+ callback function of this pcb (registered with tcp_err, see below)
+ will be called.
+
+ The tcp_connect() function can return ERR_MEM if no memory is
+ available for enqueueing the SYN segment. If the SYN indeed was
+ enqueued successfully, the tcp_connect() function returns ERR_OK.
+
+
+--- Sending TCP data
+
+TCP data is sent by enqueueing the data with a call to
+tcp_write(). When the data is successfully transmitted to the remote
+host, the application will be notified with a call to a specified
+callback function.
+
+- err_t tcp_write(struct tcp_pcb *pcb, const void *dataptr, u16_t len,
+ u8_t apiflags)
+
+ Enqueues the data pointed to by the argument dataptr. The length of
+ the data is passed as the len parameter. The apiflags can be one or more of:
+ - TCP_WRITE_FLAG_COPY: indicates whether the new memory should be allocated
+ for the data to be copied into. If this flag is not given, no new memory
+ should be allocated and the data should only be referenced by pointer. This
+ also means that the memory behind dataptr must not change until the data is
+ ACKed by the remote host
+ - TCP_WRITE_FLAG_MORE: indicates that more data follows. If this is given,
+ the PSH flag is set in the last segment created by this call to tcp_write.
+ If this flag is given, the PSH flag is not set.
+
+ The tcp_write() function will fail and return ERR_MEM if the length
+ of the data exceeds the current send buffer size or if the length of
+ the queue of outgoing segment is larger than the upper limit defined
+ in lwipopts.h. The number of bytes available in the output queue can
+ be retrieved with the tcp_sndbuf() function.
+
+ The proper way to use this function is to call the function with at
+ most tcp_sndbuf() bytes of data. If the function returns ERR_MEM,
+ the application should wait until some of the currently enqueued
+ data has been successfully received by the other host and try again.
+
+- void tcp_sent(struct tcp_pcb *pcb,
+ err_t (* sent)(void *arg, struct tcp_pcb *tpcb,
+ u16_t len))
+
+ Specifies the callback function that should be called when data has
+ successfully been received (i.e., acknowledged) by the remote
+ host. The len argument passed to the callback function gives the
+ amount bytes that was acknowledged by the last acknowledgment.
+
+
+--- Receiving TCP data
+
+TCP data reception is callback based - an application specified
+callback function is called when new data arrives. When the
+application has taken the data, it has to call the tcp_recved()
+function to indicate that TCP can advertise increase the receive
+window.
+
+- void tcp_recv(struct tcp_pcb *pcb,
+ err_t (* recv)(void *arg, struct tcp_pcb *tpcb,
+ struct pbuf *p, err_t err))
+
+ Sets the callback function that will be called when new data
+ arrives. The callback function will be passed a NULL pbuf to
+ indicate that the remote host has closed the connection. If
+ there are no errors and the callback function is to return
+ ERR_OK, then it must free the pbuf. Otherwise, it must not
+ free the pbuf so that lwIP core code can store it.
+
+- void tcp_recved(struct tcp_pcb *pcb, u16_t len)
+
+ Must be called when the application has received the data. The len
+ argument indicates the length of the received data.
+
+
+--- Application polling
+
+When a connection is idle (i.e., no data is either transmitted or
+received), lwIP will repeatedly poll the application by calling a
+specified callback function. This can be used either as a watchdog
+timer for killing connections that have stayed idle for too long, or
+as a method of waiting for memory to become available. For instance,
+if a call to tcp_write() has failed because memory wasn't available,
+the application may use the polling functionality to call tcp_write()
+again when the connection has been idle for a while.
+
+- void tcp_poll(struct tcp_pcb *pcb,
+ err_t (* poll)(void *arg, struct tcp_pcb *tpcb),
+ u8_t interval)
+
+ Specifies the polling interval and the callback function that should
+ be called to poll the application. The interval is specified in
+ number of TCP coarse grained timer shots, which typically occurs
+ twice a second. An interval of 10 means that the application would
+ be polled every 5 seconds.
+
+
+--- Closing and aborting connections
+
+- err_t tcp_close(struct tcp_pcb *pcb)
+
+ Closes the connection. The function may return ERR_MEM if no memory
+ was available for closing the connection. If so, the application
+ should wait and try again either by using the acknowledgment
+ callback or the polling functionality. If the close succeeds, the
+ function returns ERR_OK.
+
+ The pcb is deallocated by the TCP code after a call to tcp_close().
+
+- void tcp_abort(struct tcp_pcb *pcb)
+
+ Aborts the connection by sending a RST (reset) segment to the remote
+ host. The pcb is deallocated. This function never fails.
+
+ ATTENTION: When calling this from one of the TCP callbacks, make
+ sure you always return ERR_ABRT (and never return ERR_ABRT otherwise
+ or you will risk accessing deallocated memory or memory leaks!
+
+
+If a connection is aborted because of an error, the application is
+alerted of this event by the err callback. Errors that might abort a
+connection are when there is a shortage of memory. The callback
+function to be called is set using the tcp_err() function.
+
+- void tcp_err(struct tcp_pcb *pcb, void (* err)(void *arg,
+ err_t err))
+
+ The error callback function does not get the pcb passed to it as a
+ parameter since the pcb may already have been deallocated.
+
+
+--- Lower layer TCP interface
+
+TCP provides a simple interface to the lower layers of the
+system. During system initialization, the function tcp_init() has
+to be called before any other TCP function is called. When the system
+is running, the two timer functions tcp_fasttmr() and tcp_slowtmr()
+must be called with regular intervals. The tcp_fasttmr() should be
+called every TCP_FAST_INTERVAL milliseconds (defined in tcp.h) and
+tcp_slowtmr() should be called every TCP_SLOW_INTERVAL milliseconds.
+
+
+--- UDP interface
+
+The UDP interface is similar to that of TCP, but due to the lower
+level of complexity of UDP, the interface is significantly simpler.
+
+- struct udp_pcb *udp_new(void)
+
+ Creates a new UDP pcb which can be used for UDP communication. The
+ pcb is not active until it has either been bound to a local address
+ or connected to a remote address.
+
+- void udp_remove(struct udp_pcb *pcb)
+
+ Removes and deallocates the pcb.
+
+- err_t udp_bind(struct udp_pcb *pcb, ip_addr_t *ipaddr,
+ u16_t port)
+
+ Binds the pcb to a local address. The IP-address argument "ipaddr"
+ can be IP_ADDR_ANY to indicate that it should listen to any local IP
+ address. The function currently always return ERR_OK.
+
+- err_t udp_connect(struct udp_pcb *pcb, ip_addr_t *ipaddr,
+ u16_t port)
+
+ Sets the remote end of the pcb. This function does not generate any
+ network traffic, but only set the remote address of the pcb.
+
+- err_t udp_disconnect(struct udp_pcb *pcb)
+
+ Remove the remote end of the pcb. This function does not generate
+ any network traffic, but only removes the remote address of the pcb.
+
+- err_t udp_send(struct udp_pcb *pcb, struct pbuf *p)
+
+ Sends the pbuf p. The pbuf is not deallocated.
+
+- void udp_recv(struct udp_pcb *pcb,
+ void (* recv)(void *arg, struct udp_pcb *upcb,
+ struct pbuf *p,
+ ip_addr_t *addr,
+ u16_t port),
+ void *recv_arg)
+
+ Specifies a callback function that should be called when a UDP
+ datagram is received.
+
+
+--- System initalization
+
+A truly complete and generic sequence for initializing the lwip stack
+cannot be given because it depends on the build configuration (lwipopts.h)
+and additional initializations for your runtime environment (e.g. timers).
+
+We can give you some idea on how to proceed when using the raw API.
+We assume a configuration using a single Ethernet netif and the
+UDP and TCP transport layers, IPv4 and the DHCP client.
+
+Call these functions in the order of appearance:
+
+- stats_init()
+
+ Clears the structure where runtime statistics are gathered.
+
+- sys_init()
+
+ Not of much use since we set the NO_SYS 1 option in lwipopts.h,
+ to be called for easy configuration changes.
+
+- mem_init()
+
+ Initializes the dynamic memory heap defined by MEM_SIZE.
+
+- memp_init()
+
+ Initializes the memory pools defined by MEMP_NUM_x.
+
+- pbuf_init()
+
+ Initializes the pbuf memory pool defined by PBUF_POOL_SIZE.
+
+- etharp_init()
+
+ Initializes the ARP table and queue.
+ Note: you must call etharp_tmr at a ARP_TMR_INTERVAL (5 seconds) regular interval
+ after this initialization.
+
+- ip_init()
+
+ Doesn't do much, it should be called to handle future changes.
+
+- udp_init()
+
+ Clears the UDP PCB list.
+
+- tcp_init()
+
+ Clears the TCP PCB list and clears some internal TCP timers.
+ Note: you must call tcp_fasttmr() and tcp_slowtmr() at the
+ predefined regular intervals after this initialization.
+
+- netif_add(struct netif *netif, ip_addr_t *ipaddr,
+ ip_addr_t *netmask, ip_addr_t *gw,
+ void *state, err_t (* init)(struct netif *netif),
+ err_t (* input)(struct pbuf *p, struct netif *netif))
+
+ Adds your network interface to the netif_list. Allocate a struct
+ netif and pass a pointer to this structure as the first argument.
+ Give pointers to cleared ip_addr structures when using DHCP,
+ or fill them with sane numbers otherwise. The state pointer may be NULL.
+
+ The init function pointer must point to a initialization function for
+ your ethernet netif interface. The following code illustrates it's use.
+
+ err_t netif_if_init(struct netif *netif)
+ {
+ u8_t i;
+
+ for(i = 0; i < ETHARP_HWADDR_LEN; i++) netif->hwaddr[i] = some_eth_addr[i];
+ init_my_eth_device();
+ return ERR_OK;
+ }
+
+ For ethernet drivers, the input function pointer must point to the lwip
+ function ethernet_input() declared in "netif/etharp.h". Other drivers
+ must use ip_input() declared in "lwip/ip.h".
+
+- netif_set_default(struct netif *netif)
+
+ Registers the default network interface.
+
+- netif_set_up(struct netif *netif)
+
+ When the netif is fully configured this function must be called.
+
+- dhcp_start(struct netif *netif)
+
+ Creates a new DHCP client for this interface on the first call.
+ Note: you must call dhcp_fine_tmr() and dhcp_coarse_tmr() at
+ the predefined regular intervals after starting the client.
+
+ You can peek in the netif->dhcp struct for the actual DHCP status.
+
+
+--- Optimalization hints
+
+The first thing you want to optimize is the lwip_standard_checksum()
+routine from src/core/inet.c. You can override this standard
+function with the #define LWIP_CHKSUM <your_checksum_routine>.
+
+There are C examples given in inet.c or you might want to
+craft an assembly function for this. RFC1071 is a good
+introduction to this subject.
+
+Other significant improvements can be made by supplying
+assembly or inline replacements for htons() and htonl()
+if you're using a little-endian architecture.
+#define LWIP_PLATFORM_BYTESWAP 1
+#define LWIP_PLATFORM_HTONS(x) <your_htons>
+#define LWIP_PLATFORM_HTONL(x) <your_htonl>
+
+Check your network interface driver if it reads at
+a higher speed than the maximum wire-speed. If the
+hardware isn't serviced frequently and fast enough
+buffer overflows are likely to occur.
+
+E.g. when using the cs8900 driver, call cs8900if_service(ethif)
+as frequently as possible. When using an RTOS let the cs8900 interrupt
+wake a high priority task that services your driver using a binary
+semaphore or event flag. Some drivers might allow additional tuning
+to match your application and network.
+
+For a production release it is recommended to set LWIP_STATS to 0.
+Note that speed performance isn't influenced much by simply setting
+high values to the memory options.
+
+For more optimization hints take a look at the lwIP wiki.
+
+--- Zero-copy MACs
+
+To achieve zero-copy on transmit, the data passed to the raw API must
+remain unchanged until sent. Because the send- (or write-)functions return
+when the packets have been enqueued for sending, data must be kept stable
+after that, too.
+
+This implies that PBUF_RAM/PBUF_POOL pbufs passed to raw-API send functions
+must *not* be reused by the application unless their ref-count is 1.
+
+For no-copy pbufs (PBUF_ROM/PBUF_REF), data must be kept unchanged, too,
+but the stack/driver will/must copy PBUF_REF'ed data when enqueueing, while
+PBUF_ROM-pbufs are just enqueued (as ROM-data is expected to never change).
+
+Also, data passed to tcp_write without the copy-flag must not be changed!
+
+Therefore, be careful which type of PBUF you use and if you copy TCP data
+or not!
diff --git a/lwip/doc/savannah.txt b/lwip/doc/savannah.txt
new file mode 100644
index 0000000..409905b
--- /dev/null
+++ b/lwip/doc/savannah.txt
@@ -0,0 +1,135 @@
+Daily Use Guide for using Savannah for lwIP
+
+Table of Contents:
+
+1 - Obtaining lwIP from the CVS repository
+2 - Committers/developers CVS access using SSH (to be written)
+3 - Merging from DEVEL branch to main trunk (stable branch)
+4 - How to release lwIP
+
+
+
+1 Obtaining lwIP from the CVS repository
+----------------------------------------
+
+To perform an anonymous CVS checkout of the main trunk (this is where
+bug fixes and incremental enhancements occur), do this:
+
+cvs -z3 -d:pserver:anonymous@cvs.sv.gnu.org:/sources/lwip checkout lwip
+
+Or, obtain a stable branch (updated with bug fixes only) as follows:
+cvs -z3 -d:pserver:anonymous@cvs.sv.gnu.org:/sources/lwip checkout \
+ -r STABLE-0_7 -d lwip-0.7 lwip
+
+Or, obtain a specific (fixed) release as follows:
+cvs -z3 -d:pserver:anonymous@cvs.sv.gnu.org:/sources/lwip checkout \
+ -r STABLE-0_7_0 -d lwip-0.7.0 lwip
+
+3 Committers/developers CVS access using SSH
+--------------------------------------------
+
+The Savannah server uses SSH (Secure Shell) protocol 2 authentication and encryption.
+As such, CVS commits to the server occur through a SSH tunnel for project members.
+To create a SSH2 key pair in UNIX-like environments, do this:
+
+ssh-keygen -t dsa
+
+Under Windows, a recommended SSH client is "PuTTY", freely available with good
+documentation and a graphic user interface. Use its key generator.
+
+Now paste the id_dsa.pub contents into your Savannah account public key list. Wait
+a while so that Savannah can update its configuration (This can take minutes).
+
+Try to login using SSH:
+
+ssh -v your_login@cvs.sv.gnu.org
+
+If it tells you:
+
+Authenticating with public key "your_key_name"...
+Server refused to allocate pty
+
+then you could login; Savannah refuses to give you a shell - which is OK, as we
+are allowed to use SSH for CVS only. Now, you should be able to do this:
+
+export CVS_RSH=ssh
+cvs -z3 -d:ext:your_login@cvs.sv.gnu.org:/sources/lwip co lwip
+
+after which you can edit your local files with bug fixes or new features and
+commit them. Make sure you know what you are doing when using CVS to make
+changes on the repository. If in doubt, ask on the lwip-members mailing list.
+
+(If SSH asks about authenticity of the host, you can check the key
+ fingerprint against http://savannah.nongnu.org/cvs/?group=lwip)
+
+
+3 Merging from DEVEL branch to main trunk (stable)
+--------------------------------------------------
+
+Merging is a delicate process in CVS and requires the
+following disciplined steps in order to prevent conflicts
+in the future. Conflicts can be hard to solve!
+
+Merging from branch A to branch B requires that the A branch
+has a tag indicating the previous merger. This tag is called
+'merged_from_A_to_B'. After merging, the tag is moved in the
+A branch to remember this merger for future merge actions.
+
+IMPORTANT: AFTER COMMITTING A SUCCESFUL MERGE IN THE
+REPOSITORY, THE TAG MUST BE SET ON THE SOURCE BRANCH OF THE
+MERGE ACTION (REPLACING EXISTING TAGS WITH THE SAME NAME).
+
+Merge all changes in DEVEL since our last merge to main:
+
+In the working copy of the main trunk:
+cvs update -P -jmerged_from_DEVEL_to_main -jDEVEL
+
+(This will apply the changes between 'merged_from_DEVEL_to_main'
+and 'DEVEL' to your work set of files)
+
+We can now commit the merge result.
+cvs commit -R -m "Merged from DEVEL to main."
+
+If this worked out OK, we now move the tag in the DEVEL branch
+to this merge point, so we can use this point for future merges:
+
+cvs rtag -F -r DEVEL merged_from_DEVEL_to_main lwip
+
+4 How to release lwIP
+---------------------
+
+First, checkout a clean copy of the branch to be released. Tag this set with
+tag name "STABLE-0_6_3". (I use release number 0.6.3 throughout this example).
+
+Login CVS using pserver authentication, then export a clean copy of the
+tagged tree. Export is similar to a checkout, except that the CVS metadata
+is not created locally.
+
+export CVS_RSH=ssh
+cvs -z3 -d:pserver:anonymous@cvs.sv.gnu.org:/sources/lwip checkout \
+ -r STABLE-0_6_3 -d lwip-0.6.3 lwip
+
+Archive this directory using tar, gzip'd, bzip2'd and zip'd.
+
+tar czvf lwip-0.6.3.tar.gz lwip-0.6.3
+tar cjvf lwip-0.6.3.tar.bz2 lwip-0.6.3
+zip -r lwip-0.6.3.zip lwip-0.6.3
+
+Now, sign the archives with a detached GPG binary signature as follows:
+
+gpg -b lwip-0.6.3.tar.gz
+gpg -b lwip-0.6.3.tar.bz2
+gpg -b lwip-0.6.3.zip
+
+Upload these files using anonymous FTP:
+ncftp ftp://savannah.gnu.org/incoming/savannah/lwip
+
+ncftp>mput *0.6.3.*
+
+Additionally, you may post a news item on Savannah, like this:
+
+A new 0.6.3 release is now available here:
+http://savannah.nongnu.org/files/?group=lwip&highlight=0.6.3
+
+You will have to submit this via the user News interface, then approve
+this via the Administrator News interface.
\ No newline at end of file
diff --git a/lwip/doc/snmp_agent.txt b/lwip/doc/snmp_agent.txt
new file mode 100644
index 0000000..2653230
--- /dev/null
+++ b/lwip/doc/snmp_agent.txt
@@ -0,0 +1,181 @@
+SNMPv1 agent for lwIP
+
+Author: Christiaan Simons
+
+This is a brief introduction how to use and configure the SNMP agent.
+Note the agent uses the raw-API UDP interface so you may also want to
+read rawapi.txt to gain a better understanding of the SNMP message handling.
+
+0 Agent Capabilities
+====================
+
+SNMPv1 per RFC1157
+ This is an old(er) standard but is still widely supported.
+ For SNMPv2c and v3 have a greater complexity and need many
+ more lines of code. IMHO this breaks the idea of "lightweight IP".
+
+ Note the S in SNMP stands for "Simple". Note that "Simple" is
+ relative. SNMP is simple compared to the complex ISO network
+ management protocols CMIP (Common Management Information Protocol)
+ and CMOT (CMip Over Tcp).
+
+MIB II per RFC1213
+ The standard lwIP stack management information base.
+ This is a required MIB, so this is always enabled.
+ When builing lwIP without TCP, the mib-2.tcp group is omitted.
+ The groups EGP, CMOT and transmission are disabled by default.
+
+ Most mib-2 objects are not writable except:
+ sysName, sysLocation, sysContact, snmpEnableAuthenTraps.
+ Writing to or changing the ARP and IP address and route
+ tables is not possible.
+
+ Note lwIP has a very limited notion of IP routing. It currently
+ doen't have a route table and doesn't have a notion of the U,G,H flags.
+ Instead lwIP uses the interface list with only one default interface
+ acting as a single gateway interface (G) for the default route.
+
+ The agent returns a "virtual table" with the default route 0.0.0.0
+ for the default interface and network routes (no H) for each
+ network interface in the netif_list.
+ All routes are considered to be up (U).
+
+Loading additional MIBs
+ MIBs can only be added in compile-time, not in run-time.
+ There is no MIB compiler thus additional MIBs must be hand coded.
+
+Large SNMP message support
+ The packet decoding and encoding routines are designed
+ to use pbuf-chains. Larger payloads than the minimum
+ SNMP requirement of 484 octets are supported if the
+ PBUF_POOL_SIZE and IP_REASS_BUFSIZE are set to match your
+ local requirement.
+
+1 Building the Agent
+====================
+
+First of all you'll need to add the following define
+to your local lwipopts.h:
+
+#define LWIP_SNMP 1
+
+and add the source files in lwip/src/core/snmp
+and some snmp headers in lwip/src/include/lwip to your makefile.
+
+Note you'll might need to adapt you network driver to update
+the mib2 variables for your interface.
+
+2 Running the Agent
+===================
+
+The following function calls must be made in your program to
+actually get the SNMP agent running.
+
+Before starting the agent you should supply pointers
+to non-volatile memory for sysContact, sysLocation,
+and snmpEnableAuthenTraps. You can do this by calling
+
+snmp_set_syscontact()
+snmp_set_syslocation()
+snmp_set_snmpenableauthentraps()
+
+Additionally you may want to set
+
+snmp_set_sysdescr()
+snmp_set_sysobjid() (if you have a private MIB)
+snmp_set_sysname()
+
+Also before starting the agent you need to setup
+one or more trap destinations using these calls:
+
+snmp_trap_dst_enable();
+snmp_trap_dst_ip_set();
+
+In the lwIP initialisation sequence call snmp_init() just after
+the call to udp_init().
+
+Exactly every 10 msec the SNMP uptime timestamp must be updated with
+snmp_inc_sysuptime(). You should call this from a timer interrupt
+or a timer signal handler depending on your runtime environment.
+
+An alternative way to update the SNMP uptime timestamp is to do a call like
+snmp_add_sysuptime(100) each 1000ms (which is bigger "step", but call to
+a lower frequency). Another one is to not call snmp_inc_sysuptime() or
+snmp_add_sysuptime(), and to define the SNMP_GET_SYSUPTIME(sysuptime) macro.
+This one is undefined by default in mib2.c. SNMP_GET_SYSUPTIME is called inside
+snmp_get_sysuptime(u32_t *value), and enable to change "sysuptime" value only
+when it's queried (any function which need "sysuptime" have to call
+snmp_get_sysuptime).
+
+
+3 Private MIBs
+==============
+
+If want to extend the agent with your own private MIB you'll need to
+add the following define to your local lwipopts.h:
+
+#define SNMP_PRIVATE_MIB 1
+
+You must provide the private_mib.h and associated files yourself.
+Note we don't have a "MIB compiler" that generates C source from a MIB,
+so you're required to do some serious coding if you enable this!
+
+Note the lwIP enterprise ID (26381) is assigned to the lwIP project,
+ALL OBJECT IDENTIFIERS LIVING UNDER THIS ID ARE ASSIGNED BY THE lwIP
+MAINTAINERS!
+
+If you need to create your own private MIB you'll need
+to apply for your own enterprise ID with IANA: http://www.iana.org/numbers.html
+
+You can set it by passing a struct snmp_obj_id to the agent
+using snmp_set_sysobjid(&my_object_id), just before snmp_init().
+
+Note the object identifiers for thes MIB-2 and your private MIB
+tree must be kept in sorted ascending (lexicographical) order.
+This to ensure correct getnext operation.
+
+An example for a private MIB is part of the "minimal Unix" project:
+contrib/ports/unix/proj/minimal/lwip_prvmib.c
+
+The next chapter gives a more detailed description of the
+MIB-2 tree and the optional private MIB.
+
+4 The Gory Details
+==================
+
+4.0 Object identifiers and the MIB tree.
+
+We have three distinct parts for all object identifiers:
+
+The prefix
+ .iso.org.dod.internet
+
+the middle part
+ .mgmt.mib-2.ip.ipNetToMediaTable.ipNetToMediaEntry.ipNetToMediaPhysAddress
+
+and the index part
+ .1.192.168.0.1
+
+Objects located above the .internet hierarchy aren't supported.
+Currently only the .mgmt sub-tree is available and
+when the SNMP_PRIVATE_MIB is enabled the .private tree
+becomes available too.
+
+Object identifiers from incoming requests are checked
+for a matching prefix, middle part and index part
+or are expanded(*) for GetNext requests with short
+or inexisting names in the request.
+(* we call this "expansion" but this also
+resembles the "auto-completion" operation)
+
+The middle part is usually located in ROM (const)
+to preserve precious RAM on small microcontrollers.
+However RAM location is possible for a dynamically
+changing private tree.
+
+The index part is handled by functions which in
+turn use dynamically allocated index trees from RAM.
+These trees are updated by e.g. the etharp code
+when new entries are made or removed form the ARP cache.
+
+/** @todo more gory details */
diff --git a/lwip/doc/sys_arch.txt b/lwip/doc/sys_arch.txt
new file mode 100644
index 0000000..fa722ea
--- /dev/null
+++ b/lwip/doc/sys_arch.txt
@@ -0,0 +1,272 @@
+sys_arch interface for lwIP 0.6++
+
+Author: Adam Dunkels
+
+The operating system emulation layer provides a common interface
+between the lwIP code and the underlying operating system kernel. The
+general idea is that porting lwIP to new architectures requires only
+small changes to a few header files and a new sys_arch
+implementation. It is also possible to do a sys_arch implementation
+that does not rely on any underlying operating system.
+
+The sys_arch provides semaphores and mailboxes to lwIP. For the full
+lwIP functionality, multiple threads support can be implemented in the
+sys_arch, but this is not required for the basic lwIP
+functionality. Previous versions of lwIP required the sys_arch to
+implement timer scheduling as well but as of lwIP 0.5 this is
+implemented in a higher layer.
+
+In addition to the source file providing the functionality of sys_arch,
+the OS emulation layer must provide several header files defining
+macros used throughout lwip. The files required and the macros they
+must define are listed below the sys_arch description.
+
+Semaphores can be either counting or binary - lwIP works with both
+kinds. Mailboxes are used for message passing and can be implemented
+either as a queue which allows multiple messages to be posted to a
+mailbox, or as a rendez-vous point where only one message can be
+posted at a time. lwIP works with both kinds, but the former type will
+be more efficient. A message in a mailbox is just a pointer, nothing
+more.
+
+Semaphores are represented by the type "sys_sem_t" which is typedef'd
+in the sys_arch.h file. Mailboxes are equivalently represented by the
+type "sys_mbox_t". lwIP does not place any restrictions on how
+sys_sem_t or sys_mbox_t are represented internally.
+
+Since lwIP 1.4.0, semaphore and mailbox functions are prototyped in a way that
+allows both using pointers or actual OS structures to be used. This way, memory
+required for such types can be either allocated in place (globally or on the
+stack) or on the heap (allocated internally in the "*_new()" functions).
+
+The following functions must be implemented by the sys_arch:
+
+- void sys_init(void)
+
+ Is called to initialize the sys_arch layer.
+
+- err_t sys_sem_new(sys_sem_t *sem, u8_t count)
+
+ Creates a new semaphore. The semaphore is allocated to the memory that 'sem'
+ points to (which can be both a pointer or the actual OS structure).
+ The "count" argument specifies the initial state of the semaphore (which is
+ either 0 or 1).
+ If the semaphore has been created, ERR_OK should be returned. Returning any
+ other error will provide a hint what went wrong, but except for assertions,
+ no real error handling is implemented.
+
+- void sys_sem_free(sys_sem_t *sem)
+
+ Deallocates a semaphore.
+
+- void sys_sem_signal(sys_sem_t *sem)
+
+ Signals a semaphore.
+
+- u32_t sys_arch_sem_wait(sys_sem_t *sem, u32_t timeout)
+
+ Blocks the thread while waiting for the semaphore to be
+ signaled. If the "timeout" argument is non-zero, the thread should
+ only be blocked for the specified time (measured in
+ milliseconds). If the "timeout" argument is zero, the thread should be
+ blocked until the semaphore is signalled.
+
+ If the timeout argument is non-zero, the return value is the number of
+ milliseconds spent waiting for the semaphore to be signaled. If the
+ semaphore wasn't signaled within the specified time, the return value is
+ SYS_ARCH_TIMEOUT. If the thread didn't have to wait for the semaphore
+ (i.e., it was already signaled), the function may return zero.
+
+ Notice that lwIP implements a function with a similar name,
+ sys_sem_wait(), that uses the sys_arch_sem_wait() function.
+
+- int sys_sem_valid(sys_sem_t *sem)
+
+ Returns 1 if the semaphore is valid, 0 if it is not valid.
+ When using pointers, a simple way is to check the pointer for != NULL.
+ When directly using OS structures, implementing this may be more complex.
+ This may also be a define, in which case the function is not prototyped.
+
+- void sys_sem_set_invalid(sys_sem_t *sem)
+
+ Invalidate a semaphore so that sys_sem_valid() returns 0.
+ ATTENTION: This does NOT mean that the semaphore shall be deallocated:
+ sys_sem_free() is always called before calling this function!
+ This may also be a define, in which case the function is not prototyped.
+
+- err_t sys_mbox_new(sys_mbox_t *mbox, int size)
+
+ Creates an empty mailbox for maximum "size" elements. Elements stored
+ in mailboxes are pointers. You have to define macros "_MBOX_SIZE"
+ in your lwipopts.h, or ignore this parameter in your implementation
+ and use a default size.
+ If the mailbox has been created, ERR_OK should be returned. Returning any
+ other error will provide a hint what went wrong, but except for assertions,
+ no real error handling is implemented.
+
+- void sys_mbox_free(sys_mbox_t *mbox)
+
+ Deallocates a mailbox. If there are messages still present in the
+ mailbox when the mailbox is deallocated, it is an indication of a
+ programming error in lwIP and the developer should be notified.
+
+- void sys_mbox_post(sys_mbox_t *mbox, void *msg)
+
+ Posts the "msg" to the mailbox. This function have to block until
+ the "msg" is really posted.
+
+- err_t sys_mbox_trypost(sys_mbox_t *mbox, void *msg)
+
+ Try to post the "msg" to the mailbox. Returns ERR_MEM if this one
+ is full, else, ERR_OK if the "msg" is posted.
+
+- u32_t sys_arch_mbox_fetch(sys_mbox_t *mbox, void **msg, u32_t timeout)
+
+ Blocks the thread until a message arrives in the mailbox, but does
+ not block the thread longer than "timeout" milliseconds (similar to
+ the sys_arch_sem_wait() function). If "timeout" is 0, the thread should
+ be blocked until a message arrives. The "msg" argument is a result
+ parameter that is set by the function (i.e., by doing "*msg =
+ ptr"). The "msg" parameter maybe NULL to indicate that the message
+ should be dropped.
+
+ The return values are the same as for the sys_arch_sem_wait() function:
+ Number of milliseconds spent waiting or SYS_ARCH_TIMEOUT if there was a
+ timeout.
+
+ Note that a function with a similar name, sys_mbox_fetch(), is
+ implemented by lwIP.
+
+- u32_t sys_arch_mbox_tryfetch(sys_mbox_t *mbox, void **msg)
+
+ This is similar to sys_arch_mbox_fetch, however if a message is not
+ present in the mailbox, it immediately returns with the code
+ SYS_MBOX_EMPTY. On success 0 is returned.
+
+ To allow for efficient implementations, this can be defined as a
+ function-like macro in sys_arch.h instead of a normal function. For
+ example, a naive implementation could be:
+ #define sys_arch_mbox_tryfetch(mbox,msg) \
+ sys_arch_mbox_fetch(mbox,msg,1)
+ although this would introduce unnecessary delays.
+
+- int sys_mbox_valid(sys_mbox_t *mbox)
+
+ Returns 1 if the mailbox is valid, 0 if it is not valid.
+ When using pointers, a simple way is to check the pointer for != NULL.
+ When directly using OS structures, implementing this may be more complex.
+ This may also be a define, in which case the function is not prototyped.
+
+- void sys_mbox_set_invalid(sys_mbox_t *mbox)
+
+ Invalidate a mailbox so that sys_mbox_valid() returns 0.
+ ATTENTION: This does NOT mean that the mailbox shall be deallocated:
+ sys_mbox_free() is always called before calling this function!
+ This may also be a define, in which case the function is not prototyped.
+
+If threads are supported by the underlying operating system and if
+such functionality is needed in lwIP, the following function will have
+to be implemented as well:
+
+- sys_thread_t sys_thread_new(char *name, void (* thread)(void *arg), void *arg, int stacksize, int prio)
+
+ Starts a new thread named "name" with priority "prio" that will begin its
+ execution in the function "thread()". The "arg" argument will be passed as an
+ argument to the thread() function. The stack size to used for this thread is
+ the "stacksize" parameter. The id of the new thread is returned. Both the id
+ and the priority are system dependent.
+
+- err_t sys_thread_finish(sys_thread_t t)
+
+ Terminates an existing thread 't'. Return ERR_OK only if the thread finishes
+ gracefully. Otherwise, error code is returned from tcpip_finish().
+
+- sys_prot_t sys_arch_protect(void)
+
+ This optional function does a "fast" critical region protection and returns
+ the previous protection level. This function is only called during very short
+ critical regions. An embedded system which supports ISR-based drivers might
+ want to implement this function by disabling interrupts. Task-based systems
+ might want to implement this by using a mutex or disabling tasking. This
+ function should support recursive calls from the same task or interrupt. In
+ other words, sys_arch_protect() could be called while already protected. In
+ that case the return value indicates that it is already protected.
+
+ sys_arch_protect() is only required if your port is supporting an operating
+ system.
+
+- void sys_arch_unprotect(sys_prot_t pval)
+
+ This optional function does a "fast" set of critical region protection to the
+ value specified by pval. See the documentation for sys_arch_protect() for
+ more information. This function is only required if your port is supporting
+ an operating system.
+
+For some configurations, you also need:
+
+- u32_t sys_now(void)
+
+ This optional function returns the current time in milliseconds (don't care
+ for wraparound, this is only used for time diffs).
+ Not implementing this function means you cannot use some modules (e.g. TCP
+ timestamps, internal timeouts for NO_SYS==1).
+
+
+Note:
+
+Be carefull with using mem_malloc() in sys_arch. When malloc() refers to
+mem_malloc() you can run into a circular function call problem. In mem.c
+mem_init() tries to allcate a semaphore using mem_malloc, which of course
+can't be performed when sys_arch uses mem_malloc.
+
+-------------------------------------------------------------------------------
+Additional files required for the "OS support" emulation layer:
+-------------------------------------------------------------------------------
+
+cc.h - Architecture environment, some compiler specific, some
+ environment specific (probably should move env stuff
+ to sys_arch.h.)
+
+ Typedefs for the types used by lwip -
+ u8_t, s8_t, u16_t, s16_t, u32_t, s32_t, mem_ptr_t
+
+ Compiler hints for packing lwip's structures -
+ PACK_STRUCT_FIELD(x)
+ PACK_STRUCT_STRUCT
+ PACK_STRUCT_BEGIN
+ PACK_STRUCT_END
+
+ Platform specific diagnostic output -
+ LWIP_PLATFORM_DIAG(x) - non-fatal, print a message.
+ LWIP_PLATFORM_ASSERT(x) - fatal, print message and abandon execution.
+ Portability defines for printf formatters:
+ U16_F, S16_F, X16_F, U32_F, S32_F, X32_F, SZT_F
+
+ "lightweight" synchronization mechanisms -
+ SYS_ARCH_DECL_PROTECT(x) - declare a protection state variable.
+ SYS_ARCH_PROTECT(x) - enter protection mode.
+ SYS_ARCH_UNPROTECT(x) - leave protection mode.
+
+ If the compiler does not provide memset() this file must include a
+ definition of it, or include a file which defines it.
+
+ This file must either include a system-local <errno.h> which defines
+ the standard *nix error codes, or it should #define LWIP_PROVIDE_ERRNO
+ to make lwip/arch.h define the codes which are used throughout.
+
+
+perf.h - Architecture specific performance measurement.
+ Measurement calls made throughout lwip, these can be defined to nothing.
+ PERF_START - start measuring something.
+ PERF_STOP(x) - stop measuring something, and record the result.
+
+sys_arch.h - Tied to sys_arch.c
+
+ Arch dependent types for the following objects:
+ sys_sem_t, sys_mbox_t, sys_thread_t,
+ And, optionally:
+ sys_prot_t
+
+ Defines to set vars of sys_mbox_t and sys_sem_t to NULL.
+ SYS_MBOX_NULL NULL
+ SYS_SEM_NULL NULL
diff --git a/lwip/src/FILES b/lwip/src/FILES
new file mode 100644
index 0000000..952aeab
--- /dev/null
+++ b/lwip/src/FILES
@@ -0,0 +1,13 @@
+api/ - The code for the high-level wrapper API. Not needed if
+ you use the lowel-level call-back/raw API.
+
+core/ - The core of the TPC/IP stack; protocol implementations,
+ memory and buffer management, and the low-level raw API.
+
+include/ - lwIP include files.
+
+netif/ - Generic network interface device drivers are kept here,
+ as well as the ARP module.
+
+For more information on the various subdirectories, check the FILES
+file in each directory.
diff --git a/lwip/src/api/api_lib.c b/lwip/src/api/api_lib.c
new file mode 100644
index 0000000..adaaad4
--- /dev/null
+++ b/lwip/src/api/api_lib.c
@@ -0,0 +1,788 @@
+/**
+ * @file
+ * Sequential API External module
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+/* This is the part of the API that is linked with
+ the application */
+
+#include "lwip/opt.h"
+
+#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/api.h"
+#include "lwip/tcpip.h"
+#include "lwip/memp.h"
+
+#include "lwip/ip.h"
+#include "lwip/raw.h"
+#include "lwip/udp.h"
+#include "lwip/tcp.h"
+
+#include <string.h>
+
+/**
+ * Create a new netconn (of a specific type) that has a callback function.
+ * The corresponding pcb is also created.
+ *
+ * @param t the type of 'connection' to create (@see enum netconn_type)
+ * @param proto the IP protocol for RAW IP pcbs
+ * @param callback a function to call on status changes (RX available, TX'ed)
+ * @return a newly allocated struct netconn or
+ * NULL on memory error
+ */
+struct netconn*
+netconn_new_with_proto_and_callback(enum netconn_type t, u8_t proto, netconn_callback callback)
+{
+ struct netconn *conn;
+ struct api_msg msg;
+
+ conn = netconn_alloc(t, callback);
+ if (conn != NULL) {
+ err_t err;
+ msg.msg.msg.n.proto = proto;
+ msg.msg.conn = conn;
+ TCPIP_APIMSG((&msg), lwip_netconn_do_newconn, err);
+ if (err != ERR_OK) {
+ LWIP_ASSERT("freeing conn without freeing pcb", conn->pcb.tcp == NULL);
+ LWIP_ASSERT("conn has no op_completed", sys_sem_valid(&conn->op_completed));
+ LWIP_ASSERT("conn has no recvmbox", sys_mbox_valid(&conn->recvmbox));
+#if LWIP_TCP
+ LWIP_ASSERT("conn->acceptmbox shouldn't exist", !sys_mbox_valid(&conn->acceptmbox));
+#endif /* LWIP_TCP */
+ sys_sem_free(&conn->op_completed);
+ sys_mbox_free(&conn->recvmbox);
+ memp_free(MEMP_NETCONN, conn);
+ return NULL;
+ }
+ }
+ return conn;
+}
+
+/**
+ * Close a netconn 'connection' and free its resources.
+ * UDP and RAW connection are completely closed, TCP pcbs might still be in a waitstate
+ * after this returns.
+ *
+ * @param conn the netconn to delete
+ * @return ERR_OK if the connection was deleted
+ */
+err_t
+netconn_delete(struct netconn *conn)
+{
+ struct api_msg msg;
+
+ /* No ASSERT here because possible to get a (conn == NULL) if we got an accept error */
+ if (conn == NULL) {
+ return ERR_OK;
+ }
+
+ msg.function = lwip_netconn_do_delconn;
+ msg.msg.conn = conn;
+ tcpip_apimsg(&msg);
+
+ netconn_free(conn);
+
+ /* don't care for return value of lwip_netconn_do_delconn since it only calls void functions */
+
+ return ERR_OK;
+}
+
+/**
+ * Get the local or remote IP address and port of a netconn.
+ * For RAW netconns, this returns the protocol instead of a port!
+ *
+ * @param conn the netconn to query
+ * @param addr a pointer to which to save the IP address
+ * @param port a pointer to which to save the port (or protocol for RAW)
+ * @param local 1 to get the local IP address, 0 to get the remote one
+ * @return ERR_CONN for invalid connections
+ * ERR_OK if the information was retrieved
+ */
+err_t
+netconn_getaddr(struct netconn *conn, ip_addr_t *addr, u16_t *port, u8_t local)
+{
+ struct api_msg msg;
+ err_t err;
+
+ LWIP_ERROR("netconn_getaddr: invalid conn", (conn != NULL), return ERR_ARG;);
+ LWIP_ERROR("netconn_getaddr: invalid addr", (addr != NULL), return ERR_ARG;);
+ LWIP_ERROR("netconn_getaddr: invalid port", (port != NULL), return ERR_ARG;);
+
+ msg.msg.conn = conn;
+ msg.msg.msg.ad.ipaddr = ip_2_ipX(addr);
+ msg.msg.msg.ad.port = port;
+ msg.msg.msg.ad.local = local;
+ TCPIP_APIMSG(&msg, lwip_netconn_do_getaddr, err);
+
+ NETCONN_SET_SAFE_ERR(conn, err);
+ return err;
+}
+
+/**
+ * Bind a netconn to a specific local IP address and port.
+ * Binding one netconn twice might not always be checked correctly!
+ *
+ * @param conn the netconn to bind
+ * @param addr the local IP address to bind the netconn to (use IP_ADDR_ANY
+ * to bind to all addresses)
+ * @param port the local port to bind the netconn to (not used for RAW)
+ * @return ERR_OK if bound, any other err_t on failure
+ */
+err_t
+netconn_bind(struct netconn *conn, ip_addr_t *addr, u16_t port)
+{
+ struct api_msg msg;
+ err_t err;
+
+ LWIP_ERROR("netconn_bind: invalid conn", (conn != NULL), return ERR_ARG;);
+
+ msg.msg.conn = conn;
+ msg.msg.msg.bc.ipaddr = addr;
+ msg.msg.msg.bc.port = port;
+ TCPIP_APIMSG(&msg, lwip_netconn_do_bind, err);
+
+ NETCONN_SET_SAFE_ERR(conn, err);
+ return err;
+}
+
+/**
+ * Connect a netconn to a specific remote IP address and port.
+ *
+ * @param conn the netconn to connect
+ * @param addr the remote IP address to connect to
+ * @param port the remote port to connect to (no used for RAW)
+ * @return ERR_OK if connected, return value of tcp_/udp_/raw_connect otherwise
+ */
+err_t
+netconn_connect(struct netconn *conn, ip_addr_t *addr, u16_t port)
+{
+ struct api_msg msg;
+ err_t err;
+
+ LWIP_ERROR("netconn_connect: invalid conn", (conn != NULL), return ERR_ARG;);
+
+ msg.msg.conn = conn;
+ msg.msg.msg.bc.ipaddr = addr;
+ msg.msg.msg.bc.port = port;
+#if LWIP_TCP
+#if (LWIP_UDP || LWIP_RAW)
+ if (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP)
+#endif /* (LWIP_UDP || LWIP_RAW) */
+ {
+ /* The TCP version waits for the connect to succeed,
+ so always needs to use message passing. */
+ msg.function = lwip_netconn_do_connect;
+ err = tcpip_apimsg(&msg);
+ }
+#endif /* LWIP_TCP */
+#if (LWIP_UDP || LWIP_RAW) && LWIP_TCP
+ else
+#endif /* (LWIP_UDP || LWIP_RAW) && LWIP_TCP */
+#if (LWIP_UDP || LWIP_RAW)
+ {
+ /* UDP and RAW only set flags, so we can use core-locking. */
+ TCPIP_APIMSG(&msg, lwip_netconn_do_connect, err);
+ }
+#endif /* (LWIP_UDP || LWIP_RAW) */
+
+ NETCONN_SET_SAFE_ERR(conn, err);
+ return err;
+}
+
+/**
+ * Disconnect a netconn from its current peer (only valid for UDP netconns).
+ *
+ * @param conn the netconn to disconnect
+ * @return TODO: return value is not set here...
+ */
+err_t
+netconn_disconnect(struct netconn *conn)
+{
+ struct api_msg msg;
+ err_t err;
+
+ LWIP_ERROR("netconn_disconnect: invalid conn", (conn != NULL), return ERR_ARG;);
+
+ msg.msg.conn = conn;
+ TCPIP_APIMSG(&msg, lwip_netconn_do_disconnect, err);
+
+ NETCONN_SET_SAFE_ERR(conn, err);
+ return err;
+}
+
+/**
+ * Set a TCP netconn into listen mode
+ *
+ * @param conn the tcp netconn to set to listen mode
+ * @param backlog the listen backlog, only used if TCP_LISTEN_BACKLOG==1
+ * @return ERR_OK if the netconn was set to listen (UDP and RAW netconns
+ * don't return any error (yet?))
+ */
+err_t
+netconn_listen_with_backlog(struct netconn *conn, u8_t backlog)
+{
+#if LWIP_TCP
+ struct api_msg msg;
+ err_t err;
+
+ /* This does no harm. If TCP_LISTEN_BACKLOG is off, backlog is unused. */
+ LWIP_UNUSED_ARG(backlog);
+
+ LWIP_ERROR("netconn_listen: invalid conn", (conn != NULL), return ERR_ARG;);
+
+ msg.msg.conn = conn;
+#if TCP_LISTEN_BACKLOG
+ msg.msg.msg.lb.backlog = backlog;
+#endif /* TCP_LISTEN_BACKLOG */
+ TCPIP_APIMSG(&msg, lwip_netconn_do_listen, err);
+
+ NETCONN_SET_SAFE_ERR(conn, err);
+ return err;
+#else /* LWIP_TCP */
+ LWIP_UNUSED_ARG(conn);
+ LWIP_UNUSED_ARG(backlog);
+ return ERR_ARG;
+#endif /* LWIP_TCP */
+}
+
+/**
+ * Accept a new connection on a TCP listening netconn.
+ *
+ * @param conn the TCP listen netconn
+ * @param new_conn pointer where the new connection is stored
+ * @return ERR_OK if a new connection has been received or an error
+ * code otherwise
+ */
+err_t
+netconn_accept(struct netconn *conn, struct netconn **new_conn)
+{
+#if LWIP_TCP
+ struct netconn *newconn;
+ err_t err;
+#if TCP_LISTEN_BACKLOG
+ struct api_msg msg;
+#endif /* TCP_LISTEN_BACKLOG */
+
+ LWIP_ERROR("netconn_accept: invalid pointer", (new_conn != NULL), return ERR_ARG;);
+ *new_conn = NULL;
+ LWIP_ERROR("netconn_accept: invalid conn", (conn != NULL), return ERR_ARG;);
+ LWIP_ERROR("netconn_accept: invalid acceptmbox", sys_mbox_valid(&conn->acceptmbox), return ERR_ARG;);
+
+ err = conn->last_err;
+ if (ERR_IS_FATAL(err)) {
+ /* don't recv on fatal errors: this might block the application task
+ waiting on acceptmbox forever! */
+ return err;
+ }
+
+#if LWIP_SO_RCVTIMEO
+ if (sys_arch_mbox_fetch(&conn->acceptmbox, (void **)&newconn, conn->recv_timeout) == SYS_ARCH_TIMEOUT) {
+ NETCONN_SET_SAFE_ERR(conn, ERR_TIMEOUT);
+ return ERR_TIMEOUT;
+ }
+#else
+ sys_arch_mbox_fetch(&conn->acceptmbox, (void **)&newconn, 0);
+#endif /* LWIP_SO_RCVTIMEO*/
+ /* Register event with callback */
+ API_EVENT(conn, NETCONN_EVT_RCVMINUS, 0);
+
+ if (newconn == NULL) {
+ /* connection has been aborted */
+ NETCONN_SET_SAFE_ERR(conn, ERR_ABRT);
+ return ERR_ABRT;
+ }
+#if TCP_LISTEN_BACKLOG
+ /* Let the stack know that we have accepted the connection. */
+ msg.msg.conn = conn;
+ /* don't care for the return value of lwip_netconn_do_recv */
+ TCPIP_APIMSG_NOERR(&msg, lwip_netconn_do_recv);
+#endif /* TCP_LISTEN_BACKLOG */
+
+ *new_conn = newconn;
+ /* don't set conn->last_err: it's only ERR_OK, anyway */
+ return ERR_OK;
+#else /* LWIP_TCP */
+ LWIP_UNUSED_ARG(conn);
+ LWIP_UNUSED_ARG(new_conn);
+ return ERR_ARG;
+#endif /* LWIP_TCP */
+}
+
+/**
+ * Receive data: actual implementation that doesn't care whether pbuf or netbuf
+ * is received
+ *
+ * @param conn the netconn from which to receive data
+ * @param new_buf pointer where a new pbuf/netbuf is stored when received data
+ * @return ERR_OK if data has been received, an error code otherwise (timeout,
+ * memory error or another error)
+ */
+static err_t
+netconn_recv_data(struct netconn *conn, void **new_buf)
+{
+ void *buf = NULL;
+ u16_t len;
+ err_t err;
+#if LWIP_TCP
+ struct api_msg msg;
+#endif /* LWIP_TCP */
+
+ LWIP_ERROR("netconn_recv: invalid pointer", (new_buf != NULL), return ERR_ARG;);
+ *new_buf = NULL;
+ LWIP_ERROR("netconn_recv: invalid conn", (conn != NULL), return ERR_ARG;);
+ LWIP_ERROR("netconn_accept: invalid recvmbox", sys_mbox_valid(&conn->recvmbox), return ERR_CONN;);
+
+ err = conn->last_err;
+ if (ERR_IS_FATAL(err)) {
+ /* don't recv on fatal errors: this might block the application task
+ waiting on recvmbox forever! */
+ /* @todo: this does not allow us to fetch data that has been put into recvmbox
+ before the fatal error occurred - is that a problem? */
+ return err;
+ }
+
+#if LWIP_SO_RCVTIMEO
+ if (sys_arch_mbox_fetch(&conn->recvmbox, &buf, conn->recv_timeout) == SYS_ARCH_TIMEOUT) {
+ NETCONN_SET_SAFE_ERR(conn, ERR_TIMEOUT);
+ return ERR_TIMEOUT;
+ }
+#else
+ sys_arch_mbox_fetch(&conn->recvmbox, &buf, 0);
+#endif /* LWIP_SO_RCVTIMEO*/
+
+#if LWIP_TCP
+#if (LWIP_UDP || LWIP_RAW)
+ if (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP)
+#endif /* (LWIP_UDP || LWIP_RAW) */
+ {
+ if (!netconn_get_noautorecved(conn) || (buf == NULL)) {
+ /* Let the stack know that we have taken the data. */
+ /* TODO: Speedup: Don't block and wait for the answer here
+ (to prevent multiple thread-switches). */
+ msg.msg.conn = conn;
+ if (buf != NULL) {
+ msg.msg.msg.r.len = ((struct pbuf *)buf)->tot_len;
+ } else {
+ msg.msg.msg.r.len = 1;
+ }
+ /* don't care for the return value of lwip_netconn_do_recv */
+ TCPIP_APIMSG_NOERR(&msg, lwip_netconn_do_recv);
+ }
+
+ /* If we are closed, we indicate that we no longer wish to use the socket */
+ if (buf == NULL) {
+ API_EVENT(conn, NETCONN_EVT_RCVMINUS, 0);
+ /* Avoid to lose any previous error code */
+ NETCONN_SET_SAFE_ERR(conn, ERR_CLSD);
+ return ERR_CLSD;
+ }
+ len = ((struct pbuf *)buf)->tot_len;
+ }
+#endif /* LWIP_TCP */
+#if LWIP_TCP && (LWIP_UDP || LWIP_RAW)
+ else
+#endif /* LWIP_TCP && (LWIP_UDP || LWIP_RAW) */
+#if (LWIP_UDP || LWIP_RAW)
+ {
+ LWIP_ASSERT("buf != NULL", buf != NULL);
+ len = netbuf_len((struct netbuf *)buf);
+ }
+#endif /* (LWIP_UDP || LWIP_RAW) */
+
+#if LWIP_SO_RCVBUF
+ SYS_ARCH_DEC(conn->recv_avail, len);
+#endif /* LWIP_SO_RCVBUF */
+ /* Register event with callback */
+ API_EVENT(conn, NETCONN_EVT_RCVMINUS, len);
+
+ LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_recv_data: received %p, len=%"U16_F"\n", buf, len));
+
+ *new_buf = buf;
+ /* don't set conn->last_err: it's only ERR_OK, anyway */
+ return ERR_OK;
+}
+
+/**
+ * Receive data (in form of a pbuf) from a TCP netconn
+ *
+ * @param conn the netconn from which to receive data
+ * @param new_buf pointer where a new pbuf is stored when received data
+ * @return ERR_OK if data has been received, an error code otherwise (timeout,
+ * memory error or another error)
+ * ERR_ARG if conn is not a TCP netconn
+ */
+err_t
+netconn_recv_tcp_pbuf(struct netconn *conn, struct pbuf **new_buf)
+{
+ LWIP_ERROR("netconn_recv: invalid conn", (conn != NULL) &&
+ NETCONNTYPE_GROUP(netconn_type(conn)) == NETCONN_TCP, return ERR_ARG;);
+
+ return netconn_recv_data(conn, (void **)new_buf);
+}
+
+/**
+ * Receive data (in form of a netbuf containing a packet buffer) from a netconn
+ *
+ * @param conn the netconn from which to receive data
+ * @param new_buf pointer where a new netbuf is stored when received data
+ * @return ERR_OK if data has been received, an error code otherwise (timeout,
+ * memory error or another error)
+ */
+err_t
+netconn_recv(struct netconn *conn, struct netbuf **new_buf)
+{
+#if LWIP_TCP
+ struct netbuf *buf = NULL;
+ err_t err;
+#endif /* LWIP_TCP */
+
+ LWIP_ERROR("netconn_recv: invalid pointer", (new_buf != NULL), return ERR_ARG;);
+ *new_buf = NULL;
+ LWIP_ERROR("netconn_recv: invalid conn", (conn != NULL), return ERR_ARG;);
+ LWIP_ERROR("netconn_accept: invalid recvmbox", sys_mbox_valid(&conn->recvmbox), return ERR_CONN;);
+
+#if LWIP_TCP
+#if (LWIP_UDP || LWIP_RAW)
+ if (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP)
+#endif /* (LWIP_UDP || LWIP_RAW) */
+ {
+ struct pbuf *p = NULL;
+ /* This is not a listening netconn, since recvmbox is set */
+
+ buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
+ if (buf == NULL) {
+ NETCONN_SET_SAFE_ERR(conn, ERR_MEM);
+ return ERR_MEM;
+ }
+
+ err = netconn_recv_data(conn, (void **)&p);
+ if (err != ERR_OK) {
+ memp_free(MEMP_NETBUF, buf);
+ return err;
+ }
+ LWIP_ASSERT("p != NULL", p != NULL);
+
+ buf->p = p;
+ buf->ptr = p;
+ buf->port = 0;
+ ipX_addr_set_any(LWIP_IPV6, &buf->addr);
+ *new_buf = buf;
+ /* don't set conn->last_err: it's only ERR_OK, anyway */
+ return ERR_OK;
+ }
+#endif /* LWIP_TCP */
+#if LWIP_TCP && (LWIP_UDP || LWIP_RAW)
+ else
+#endif /* LWIP_TCP && (LWIP_UDP || LWIP_RAW) */
+ {
+#if (LWIP_UDP || LWIP_RAW)
+ return netconn_recv_data(conn, (void **)new_buf);
+#endif /* (LWIP_UDP || LWIP_RAW) */
+ }
+}
+
+/**
+ * TCP: update the receive window: by calling this, the application
+ * tells the stack that it has processed data and is able to accept
+ * new data.
+ * ATTENTION: use with care, this is mainly used for sockets!
+ * Can only be used when calling netconn_set_noautorecved(conn, 1) before.
+ *
+ * @param conn the netconn for which to update the receive window
+ * @param length amount of data processed (ATTENTION: this must be accurate!)
+ */
+void
+netconn_recved(struct netconn *conn, u32_t length)
+{
+#if LWIP_TCP
+ if ((conn != NULL) && (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) &&
+ (netconn_get_noautorecved(conn))) {
+ struct api_msg msg;
+ /* Let the stack know that we have taken the data. */
+ /* TODO: Speedup: Don't block and wait for the answer here
+ (to prevent multiple thread-switches). */
+ msg.msg.conn = conn;
+ msg.msg.msg.r.len = length;
+ /* don't care for the return value of lwip_netconn_do_recv */
+ TCPIP_APIMSG_NOERR(&msg, lwip_netconn_do_recv);
+ }
+#else /* LWIP_TCP */
+ LWIP_UNUSED_ARG(conn);
+ LWIP_UNUSED_ARG(length);
+#endif /* LWIP_TCP */
+}
+
+/**
+ * Send data (in form of a netbuf) to a specific remote IP address and port.
+ * Only to be used for UDP and RAW netconns (not TCP).
+ *
+ * @param conn the netconn over which to send data
+ * @param buf a netbuf containing the data to send
+ * @param addr the remote IP address to which to send the data
+ * @param port the remote port to which to send the data
+ * @return ERR_OK if data was sent, any other err_t on error
+ */
+err_t
+netconn_sendto(struct netconn *conn, struct netbuf *buf, ip_addr_t *addr, u16_t port)
+{
+ if (buf != NULL) {
+ ipX_addr_set_ipaddr(PCB_ISIPV6(conn->pcb.ip), &buf->addr, addr);
+ buf->port = port;
+ return netconn_send(conn, buf);
+ }
+ return ERR_VAL;
+}
+
+/**
+ * Send data over a UDP or RAW netconn (that is already connected).
+ *
+ * @param conn the UDP or RAW netconn over which to send data
+ * @param buf a netbuf containing the data to send
+ * @return ERR_OK if data was sent, any other err_t on error
+ */
+err_t
+netconn_send(struct netconn *conn, struct netbuf *buf)
+{
+ struct api_msg msg;
+ err_t err;
+
+ LWIP_ERROR("netconn_send: invalid conn", (conn != NULL), return ERR_ARG;);
+
+ LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_send: sending %"U16_F" bytes\n", buf->p->tot_len));
+ msg.msg.conn = conn;
+ msg.msg.msg.b = buf;
+ TCPIP_APIMSG(&msg, lwip_netconn_do_send, err);
+
+ NETCONN_SET_SAFE_ERR(conn, err);
+ return err;
+}
+
+/**
+ * Send data over a TCP netconn.
+ *
+ * @param conn the TCP netconn over which to send data
+ * @param dataptr pointer to the application buffer that contains the data to send
+ * @param size size of the application data to send
+ * @param apiflags combination of following flags :
+ * - NETCONN_COPY: data will be copied into memory belonging to the stack
+ * - NETCONN_MORE: for TCP connection, PSH flag will be set on last segment sent
+ * - NETCONN_DONTBLOCK: only write the data if all dat can be written at once
+ * @param bytes_written pointer to a location that receives the number of written bytes
+ * @return ERR_OK if data was sent, any other err_t on error
+ */
+err_t
+netconn_write_partly(struct netconn *conn, const void *dataptr, size_t size,
+ u8_t apiflags, size_t *bytes_written)
+{
+ struct api_msg msg;
+ err_t err;
+ u8_t dontblock;
+
+ LWIP_ERROR("netconn_write: invalid conn", (conn != NULL), return ERR_ARG;);
+ LWIP_ERROR("netconn_write: invalid conn->type", (NETCONNTYPE_GROUP(conn->type)== NETCONN_TCP), return ERR_VAL;);
+ if (size == 0) {
+ return ERR_OK;
+ }
+ dontblock = netconn_is_nonblocking(conn) || (apiflags & NETCONN_DONTBLOCK);
+ if (dontblock && !bytes_written) {
+ /* This implies netconn_write() cannot be used for non-blocking send, since
+ it has no way to return the number of bytes written. */
+ return ERR_VAL;
+ }
+
+ /* non-blocking write sends as much */
+ msg.msg.conn = conn;
+ msg.msg.msg.w.dataptr = dataptr;
+ msg.msg.msg.w.apiflags = apiflags;
+ msg.msg.msg.w.len = size;
+#if LWIP_SO_SNDTIMEO
+ if (conn->send_timeout != 0) {
+ /* get the time we started, which is later compared to
+ sys_now() + conn->send_timeout */
+ msg.msg.msg.w.time_started = sys_now();
+ } else {
+ msg.msg.msg.w.time_started = 0;
+ }
+#endif /* LWIP_SO_SNDTIMEO */
+
+ /* For locking the core: this _can_ be delayed on low memory/low send buffer,
+ but if it is, this is done inside api_msg.c:do_write(), so we can use the
+ non-blocking version here. */
+ TCPIP_APIMSG(&msg, lwip_netconn_do_write, err);
+ if ((err == ERR_OK) && (bytes_written != NULL)) {
+ if (dontblock
+#if LWIP_SO_SNDTIMEO
+ || (conn->send_timeout != 0)
+#endif /* LWIP_SO_SNDTIMEO */
+ ) {
+ /* nonblocking write: maybe the data has been sent partly */
+ *bytes_written = msg.msg.msg.w.len;
+ } else {
+ /* blocking call succeeded: all data has been sent if it */
+ *bytes_written = size;
+ }
+ }
+
+ NETCONN_SET_SAFE_ERR(conn, err);
+ return err;
+}
+
+/**
+ * Close ot shutdown a TCP netconn (doesn't delete it).
+ *
+ * @param conn the TCP netconn to close or shutdown
+ * @param how fully close or only shutdown one side?
+ * @return ERR_OK if the netconn was closed, any other err_t on error
+ */
+static err_t
+netconn_close_shutdown(struct netconn *conn, u8_t how)
+{
+ struct api_msg msg;
+ err_t err;
+
+ LWIP_ERROR("netconn_close: invalid conn", (conn != NULL), return ERR_ARG;);
+
+ msg.function = lwip_netconn_do_close;
+ msg.msg.conn = conn;
+ /* shutting down both ends is the same as closing */
+ msg.msg.msg.sd.shut = how;
+ /* because of the LWIP_TCPIP_CORE_LOCKING implementation of lwip_netconn_do_close,
+ don't use TCPIP_APIMSG here */
+ err = tcpip_apimsg(&msg);
+
+ NETCONN_SET_SAFE_ERR(conn, err);
+ return err;
+}
+
+/**
+ * Close a TCP netconn (doesn't delete it).
+ *
+ * @param conn the TCP netconn to close
+ * @return ERR_OK if the netconn was closed, any other err_t on error
+ */
+err_t
+netconn_close(struct netconn *conn)
+{
+ /* shutting down both ends is the same as closing */
+ return netconn_close_shutdown(conn, NETCONN_SHUT_RDWR);
+}
+
+/**
+ * Shut down one or both sides of a TCP netconn (doesn't delete it).
+ *
+ * @param conn the TCP netconn to shut down
+ * @return ERR_OK if the netconn was closed, any other err_t on error
+ */
+err_t
+netconn_shutdown(struct netconn *conn, u8_t shut_rx, u8_t shut_tx)
+{
+ return netconn_close_shutdown(conn, (shut_rx ? NETCONN_SHUT_RD : 0) | (shut_tx ? NETCONN_SHUT_WR : 0));
+}
+
+#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD)
+/**
+ * Join multicast groups for UDP netconns.
+ *
+ * @param conn the UDP netconn for which to change multicast addresses
+ * @param multiaddr IP address of the multicast group to join or leave
+ * @param netif_addr the IP address of the network interface on which to send
+ * the igmp message
+ * @param join_or_leave flag whether to send a join- or leave-message
+ * @return ERR_OK if the action was taken, any err_t on error
+ */
+err_t
+netconn_join_leave_group(struct netconn *conn,
+ ip_addr_t *multiaddr,
+ ip_addr_t *netif_addr,
+ enum netconn_igmp join_or_leave)
+{
+ struct api_msg msg;
+ err_t err;
+
+ LWIP_ERROR("netconn_join_leave_group: invalid conn", (conn != NULL), return ERR_ARG;);
+
+ msg.msg.conn = conn;
+ msg.msg.msg.jl.multiaddr = ip_2_ipX(multiaddr);
+ msg.msg.msg.jl.netif_addr = ip_2_ipX(netif_addr);
+ msg.msg.msg.jl.join_or_leave = join_or_leave;
+ TCPIP_APIMSG(&msg, lwip_netconn_do_join_leave_group, err);
+
+ NETCONN_SET_SAFE_ERR(conn, err);
+ return err;
+}
+#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */
+
+#if LWIP_DNS
+/**
+ * Execute a DNS query, only one IP address is returned
+ *
+ * @param name a string representation of the DNS host name to query
+ * @param addr a preallocated ip_addr_t where to store the resolved IP address
+ * @return ERR_OK: resolving succeeded
+ * ERR_MEM: memory error, try again later
+ * ERR_ARG: dns client not initialized or invalid hostname
+ * ERR_VAL: dns server response was invalid
+ */
+err_t
+netconn_gethostbyname(const char *name, ip_addr_t *addr)
+{
+ struct dns_api_msg msg;
+ err_t err;
+ sys_sem_t sem;
+
+ LWIP_ERROR("netconn_gethostbyname: invalid name", (name != NULL), return ERR_ARG;);
+ LWIP_ERROR("netconn_gethostbyname: invalid addr", (addr != NULL), return ERR_ARG;);
+
+ err = sys_sem_new(&sem, 0);
+ if (err != ERR_OK) {
+ return err;
+ }
+
+ msg.name = name;
+ msg.addr = addr;
+ msg.err = &err;
+ msg.sem = &sem;
+
+ tcpip_callback(lwip_netconn_do_gethostbyname, &msg);
+ sys_sem_wait(&sem);
+ sys_sem_free(&sem);
+
+ return err;
+}
+#endif /* LWIP_DNS*/
+
+#endif /* LWIP_NETCONN */
diff --git a/lwip/src/api/api_msg.c b/lwip/src/api/api_msg.c
new file mode 100644
index 0000000..77f8a0a
--- /dev/null
+++ b/lwip/src/api/api_msg.c
@@ -0,0 +1,1616 @@
+/**
+ * @file
+ * Sequential API Internal module
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/api_msg.h"
+
+#include "lwip/ip.h"
+#include "lwip/udp.h"
+#include "lwip/tcp.h"
+#include "lwip/raw.h"
+
+#include "lwip/memp.h"
+#include "lwip/tcpip.h"
+#include "lwip/igmp.h"
+#include "lwip/dns.h"
+#include "lwip/mld6.h"
+
+#include <string.h>
+
+#define SET_NONBLOCKING_CONNECT(conn, val) do { if(val) { \
+ (conn)->flags |= NETCONN_FLAG_IN_NONBLOCKING_CONNECT; \
+} else { \
+ (conn)->flags &= ~ NETCONN_FLAG_IN_NONBLOCKING_CONNECT; }} while(0)
+#define IN_NONBLOCKING_CONNECT(conn) (((conn)->flags & NETCONN_FLAG_IN_NONBLOCKING_CONNECT) != 0)
+
+/* forward declarations */
+#if LWIP_TCP
+static err_t lwip_netconn_do_writemore(struct netconn *conn);
+static void lwip_netconn_do_close_internal(struct netconn *conn);
+#endif
+
+#if LWIP_RAW
+/**
+ * Receive callback function for RAW netconns.
+ * Doesn't 'eat' the packet, only references it and sends it to
+ * conn->recvmbox
+ *
+ * @see raw.h (struct raw_pcb.recv) for parameters and return value
+ */
+static u8_t
+recv_raw(void *arg, struct raw_pcb *pcb, struct pbuf *p,
+ ip_addr_t *addr)
+{
+ struct pbuf *q;
+ struct netbuf *buf;
+ struct netconn *conn;
+
+ LWIP_UNUSED_ARG(addr);
+ conn = (struct netconn *)arg;
+
+ if ((conn != NULL) && sys_mbox_valid(&conn->recvmbox)) {
+#if LWIP_SO_RCVBUF
+ int recv_avail;
+ SYS_ARCH_GET(conn->recv_avail, recv_avail);
+ if ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize) {
+ return 0;
+ }
+#endif /* LWIP_SO_RCVBUF */
+ /* copy the whole packet into new pbufs */
+ q = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
+ if(q != NULL) {
+ if (pbuf_copy(q, p) != ERR_OK) {
+ pbuf_free(q);
+ q = NULL;
+ }
+ }
+
+ if (q != NULL) {
+ u16_t len;
+ buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
+ if (buf == NULL) {
+ pbuf_free(q);
+ return 0;
+ }
+
+ buf->p = q;
+ buf->ptr = q;
+ ipX_addr_copy(PCB_ISIPV6(pcb), buf->addr, *ipX_current_src_addr());
+ buf->port = pcb->protocol;
+
+ len = q->tot_len;
+ if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) {
+ netbuf_delete(buf);
+ return 0;
+ } else {
+#if LWIP_SO_RCVBUF
+ SYS_ARCH_INC(conn->recv_avail, len);
+#endif /* LWIP_SO_RCVBUF */
+ /* Register event with callback */
+ API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
+ }
+ }
+ }
+
+ return 0; /* do not eat the packet */
+}
+#endif /* LWIP_RAW*/
+
+#if LWIP_UDP
+/**
+ * Receive callback function for UDP netconns.
+ * Posts the packet to conn->recvmbox or deletes it on memory error.
+ *
+ * @see udp.h (struct udp_pcb.recv) for parameters
+ */
+static void
+recv_udp(void *arg, struct udp_pcb *pcb, struct pbuf *p,
+ ip_addr_t *addr, u16_t port)
+{
+ struct netbuf *buf;
+ struct netconn *conn;
+ u16_t len;
+#if LWIP_SO_RCVBUF
+ int recv_avail;
+#endif /* LWIP_SO_RCVBUF */
+
+ LWIP_UNUSED_ARG(pcb); /* only used for asserts... */
+ LWIP_ASSERT("recv_udp must have a pcb argument", pcb != NULL);
+ LWIP_ASSERT("recv_udp must have an argument", arg != NULL);
+ conn = (struct netconn *)arg;
+ LWIP_ASSERT("recv_udp: recv for wrong pcb!", conn->pcb.udp == pcb);
+
+#if LWIP_SO_RCVBUF
+ SYS_ARCH_GET(conn->recv_avail, recv_avail);
+ if ((conn == NULL) || !sys_mbox_valid(&conn->recvmbox) ||
+ ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize)) {
+#else /* LWIP_SO_RCVBUF */
+ if ((conn == NULL) || !sys_mbox_valid(&conn->recvmbox)) {
+#endif /* LWIP_SO_RCVBUF */
+ pbuf_free(p);
+ return;
+ }
+
+ buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
+ if (buf == NULL) {
+ pbuf_free(p);
+ return;
+ } else {
+ buf->p = p;
+ buf->ptr = p;
+ ipX_addr_set_ipaddr(ip_current_is_v6(), &buf->addr, addr);
+ buf->port = port;
+#if LWIP_NETBUF_RECVINFO
+ {
+ /* get the UDP header - always in the first pbuf, ensured by udp_input */
+ const struct udp_hdr* udphdr = ipX_next_header_ptr();
+#if LWIP_CHECKSUM_ON_COPY
+ buf->flags = NETBUF_FLAG_DESTADDR;
+#endif /* LWIP_CHECKSUM_ON_COPY */
+ ipX_addr_set(ip_current_is_v6(), &buf->toaddr, ipX_current_dest_addr());
+ buf->toport_chksum = udphdr->dest;
+ }
+#endif /* LWIP_NETBUF_RECVINFO */
+ }
+
+ len = p->tot_len;
+ if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) {
+ netbuf_delete(buf);
+ return;
+ } else {
+#if LWIP_SO_RCVBUF
+ SYS_ARCH_INC(conn->recv_avail, len);
+#endif /* LWIP_SO_RCVBUF */
+ /* Register event with callback */
+ API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
+ }
+}
+#endif /* LWIP_UDP */
+
+#if LWIP_TCP
+/**
+ * Receive callback function for TCP netconns.
+ * Posts the packet to conn->recvmbox, but doesn't delete it on errors.
+ *
+ * @see tcp.h (struct tcp_pcb.recv) for parameters and return value
+ */
+static err_t
+recv_tcp(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
+{
+ struct netconn *conn;
+ u16_t len;
+
+ LWIP_UNUSED_ARG(pcb);
+ LWIP_ASSERT("recv_tcp must have a pcb argument", pcb != NULL);
+ LWIP_ASSERT("recv_tcp must have an argument", arg != NULL);
+ conn = (struct netconn *)arg;
+ LWIP_ASSERT("recv_tcp: recv for wrong pcb!", conn->pcb.tcp == pcb);
+
+ if (conn == NULL) {
+ return ERR_VAL;
+ }
+ if (!sys_mbox_valid(&conn->recvmbox)) {
+ /* recvmbox already deleted */
+ if (p != NULL) {
+ tcp_recved(pcb, p->tot_len);
+ pbuf_free(p);
+ }
+ return ERR_OK;
+ }
+ /* Unlike for UDP or RAW pcbs, don't check for available space
+ using recv_avail since that could break the connection
+ (data is already ACKed) */
+
+ /* don't overwrite fatal errors! */
+ NETCONN_SET_SAFE_ERR(conn, err);
+
+ if (p != NULL) {
+ len = p->tot_len;
+ } else {
+ len = 0;
+ }
+
+ if (sys_mbox_trypost(&conn->recvmbox, p) != ERR_OK) {
+ /* don't deallocate p: it is presented to us later again from tcp_fasttmr! */
+ return ERR_MEM;
+ } else {
+#if LWIP_SO_RCVBUF
+ SYS_ARCH_INC(conn->recv_avail, len);
+#endif /* LWIP_SO_RCVBUF */
+ /* Register event with callback */
+ API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
+ }
+
+ return ERR_OK;
+}
+
+/**
+ * Poll callback function for TCP netconns.
+ * Wakes up an application thread that waits for a connection to close
+ * or data to be sent. The application thread then takes the
+ * appropriate action to go on.
+ *
+ * Signals the conn->sem.
+ * netconn_close waits for conn->sem if closing failed.
+ *
+ * @see tcp.h (struct tcp_pcb.poll) for parameters and return value
+ */
+static err_t
+poll_tcp(void *arg, struct tcp_pcb *pcb)
+{
+ struct netconn *conn = (struct netconn *)arg;
+
+ LWIP_UNUSED_ARG(pcb);
+ LWIP_ASSERT("conn != NULL", (conn != NULL));
+
+ if (conn->state == NETCONN_WRITE) {
+ lwip_netconn_do_writemore(conn);
+ } else if (conn->state == NETCONN_CLOSE) {
+ lwip_netconn_do_close_internal(conn);
+ }
+ /* @todo: implement connect timeout here? */
+
+ /* Did a nonblocking write fail before? Then check available write-space. */
+ if (conn->flags & NETCONN_FLAG_CHECK_WRITESPACE) {
+ /* If the queued byte- or pbuf-count drops below the configured low-water limit,
+ let select mark this pcb as writable again. */
+ if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) &&
+ (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) {
+ conn->flags &= ~NETCONN_FLAG_CHECK_WRITESPACE;
+ API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
+ }
+ }
+
+ return ERR_OK;
+}
+
+/**
+ * Sent callback function for TCP netconns.
+ * Signals the conn->sem and calls API_EVENT.
+ * netconn_write waits for conn->sem if send buffer is low.
+ *
+ * @see tcp.h (struct tcp_pcb.sent) for parameters and return value
+ */
+static err_t
+sent_tcp(void *arg, struct tcp_pcb *pcb, u16_t len)
+{
+ struct netconn *conn = (struct netconn *)arg;
+
+ LWIP_UNUSED_ARG(pcb);
+ LWIP_ASSERT("conn != NULL", (conn != NULL));
+
+ if (conn->state == NETCONN_WRITE) {
+ lwip_netconn_do_writemore(conn);
+ } else if (conn->state == NETCONN_CLOSE) {
+ lwip_netconn_do_close_internal(conn);
+ }
+
+ if (conn) {
+ /* If the queued byte- or pbuf-count drops below the configured low-water limit,
+ let select mark this pcb as writable again. */
+ if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) &&
+ (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) {
+ conn->flags &= ~NETCONN_FLAG_CHECK_WRITESPACE;
+ API_EVENT(conn, NETCONN_EVT_SENDPLUS, len);
+ }
+ }
+
+ return ERR_OK;
+}
+
+/**
+ * Error callback function for TCP netconns.
+ * Signals conn->sem, posts to all conn mboxes and calls API_EVENT.
+ * The application thread has then to decide what to do.
+ *
+ * @see tcp.h (struct tcp_pcb.err) for parameters
+ */
+static void
+err_tcp(void *arg, err_t err)
+{
+ struct netconn *conn;
+ enum netconn_state old_state;
+ SYS_ARCH_DECL_PROTECT(lev);
+
+ conn = (struct netconn *)arg;
+ LWIP_ASSERT("conn != NULL", (conn != NULL));
+
+ conn->pcb.tcp = NULL;
+
+ /* no check since this is always fatal! */
+ SYS_ARCH_PROTECT(lev);
+ conn->last_err = err;
+ SYS_ARCH_UNPROTECT(lev);
+
+ /* reset conn->state now before waking up other threads */
+ old_state = conn->state;
+ conn->state = NETCONN_NONE;
+
+ /* Notify the user layer about a connection error. Used to signal
+ select. */
+ API_EVENT(conn, NETCONN_EVT_ERROR, 0);
+ /* Try to release selects pending on 'read' or 'write', too.
+ They will get an error if they actually try to read or write. */
+ API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
+ API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
+
+ /* pass NULL-message to recvmbox to wake up pending recv */
+ if (sys_mbox_valid(&conn->recvmbox)) {
+ /* use trypost to prevent deadlock */
+ sys_mbox_trypost(&conn->recvmbox, NULL);
+ }
+ /* pass NULL-message to acceptmbox to wake up pending accept */
+ if (sys_mbox_valid(&conn->acceptmbox)) {
+ /* use trypost to preven deadlock */
+ sys_mbox_trypost(&conn->acceptmbox, NULL);
+ }
+
+ if ((old_state == NETCONN_WRITE) || (old_state == NETCONN_CLOSE) ||
+ (old_state == NETCONN_CONNECT)) {
+ /* calling lwip_netconn_do_writemore/lwip_netconn_do_close_internal is not necessary
+ since the pcb has already been deleted! */
+ int was_nonblocking_connect = IN_NONBLOCKING_CONNECT(conn);
+ SET_NONBLOCKING_CONNECT(conn, 0);
+
+ if (!was_nonblocking_connect) {
+ /* set error return code */
+ LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
+ conn->current_msg->err = err;
+ conn->current_msg = NULL;
+ /* wake up the waiting task */
+ sys_sem_signal(&conn->op_completed);
+ }
+ } else {
+ LWIP_ASSERT("conn->current_msg == NULL", conn->current_msg == NULL);
+ }
+}
+
+/**
+ * Setup a tcp_pcb with the correct callback function pointers
+ * and their arguments.
+ *
+ * @param conn the TCP netconn to setup
+ */
+static void
+setup_tcp(struct netconn *conn)
+{
+ struct tcp_pcb *pcb;
+
+ pcb = conn->pcb.tcp;
+ tcp_arg(pcb, conn);
+ tcp_recv(pcb, recv_tcp);
+ tcp_sent(pcb, sent_tcp);
+ tcp_poll(pcb, poll_tcp, 4);
+ tcp_err(pcb, err_tcp);
+}
+
+/**
+ * Accept callback function for TCP netconns.
+ * Allocates a new netconn and posts that to conn->acceptmbox.
+ *
+ * @see tcp.h (struct tcp_pcb_listen.accept) for parameters and return value
+ */
+static err_t
+accept_function(void *arg, struct tcp_pcb *newpcb, err_t err)
+{
+ struct netconn *newconn;
+ struct netconn *conn = (struct netconn *)arg;
+
+ LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: newpcb->tate: %s\n", tcp_debug_state_str(newpcb->state)));
+
+ if (!sys_mbox_valid(&conn->acceptmbox)) {
+ LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: acceptmbox already deleted\n"));
+ return ERR_VAL;
+ }
+
+ /* We have to set the callback here even though
+ * the new socket is unknown. conn->socket is marked as -1. */
+ newconn = netconn_alloc(conn->type, conn->callback);
+ if (newconn == NULL) {
+ return ERR_MEM;
+ }
+ newconn->pcb.tcp = newpcb;
+ setup_tcp(newconn);
+ /* no protection: when creating the pcb, the netconn is not yet known
+ to the application thread */
+ newconn->last_err = err;
+
+ if (sys_mbox_trypost(&conn->acceptmbox, newconn) != ERR_OK) {
+ /* When returning != ERR_OK, the pcb is aborted in tcp_process(),
+ so do nothing here! */
+ /* remove all references to this netconn from the pcb */
+ struct tcp_pcb* pcb = newconn->pcb.tcp;
+ tcp_arg(pcb, NULL);
+ tcp_recv(pcb, NULL);
+ tcp_sent(pcb, NULL);
+ tcp_poll(pcb, NULL, 4);
+ tcp_err(pcb, NULL);
+ /* remove reference from to the pcb from this netconn */
+ newconn->pcb.tcp = NULL;
+ /* no need to drain since we know the recvmbox is empty. */
+ sys_mbox_free(&newconn->recvmbox);
+ sys_mbox_set_invalid(&newconn->recvmbox);
+ netconn_free(newconn);
+ return ERR_MEM;
+ } else {
+ /* Register event with callback */
+ API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
+ }
+
+ return ERR_OK;
+}
+#endif /* LWIP_TCP */
+
+/**
+ * Create a new pcb of a specific type.
+ * Called from lwip_netconn_do_newconn().
+ *
+ * @param msg the api_msg_msg describing the connection type
+ * @return msg->conn->err, but the return value is currently ignored
+ */
+static void
+pcb_new(struct api_msg_msg *msg)
+{
+ LWIP_ASSERT("pcb_new: pcb already allocated", msg->conn->pcb.tcp == NULL);
+
+ /* Allocate a PCB for this connection */
+ switch(NETCONNTYPE_GROUP(msg->conn->type)) {
+#if LWIP_RAW
+ case NETCONN_RAW:
+ msg->conn->pcb.raw = raw_new(msg->msg.n.proto);
+ if(msg->conn->pcb.raw != NULL) {
+ raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn);
+ }
+ break;
+#endif /* LWIP_RAW */
+#if LWIP_UDP
+ case NETCONN_UDP:
+ msg->conn->pcb.udp = udp_new();
+ if(msg->conn->pcb.udp != NULL) {
+#if LWIP_UDPLITE
+ if (NETCONNTYPE_ISUDPLITE(msg->conn->type)) {
+ udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE);
+ }
+#endif /* LWIP_UDPLITE */
+ if (NETCONNTYPE_ISUDPNOCHKSUM(msg->conn->type)) {
+ udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM);
+ }
+ udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
+ }
+ break;
+#endif /* LWIP_UDP */
+#if LWIP_TCP
+ case NETCONN_TCP:
+ msg->conn->pcb.tcp = tcp_new();
+ if(msg->conn->pcb.tcp != NULL) {
+ setup_tcp(msg->conn);
+ }
+ break;
+#endif /* LWIP_TCP */
+ default:
+ /* Unsupported netconn type, e.g. protocol disabled */
+ msg->err = ERR_VAL;
+ return;
+ }
+ if (msg->conn->pcb.ip == NULL) {
+ msg->err = ERR_MEM;
+ }
+#if LWIP_IPV6
+ else {
+ if (NETCONNTYPE_ISIPV6(msg->conn->type)) {
+ ip_set_v6(msg->conn->pcb.ip, 1);
+ }
+ }
+#endif /* LWIP_IPV6 */
+}
+
+/**
+ * Create a new pcb of a specific type inside a netconn.
+ * Called from netconn_new_with_proto_and_callback.
+ *
+ * @param msg the api_msg_msg describing the connection type
+ */
+void
+lwip_netconn_do_newconn(struct api_msg_msg *msg)
+{
+ msg->err = ERR_OK;
+ if(msg->conn->pcb.tcp == NULL) {
+ pcb_new(msg);
+ }
+ /* Else? This "new" connection already has a PCB allocated. */
+ /* Is this an error condition? Should it be deleted? */
+ /* We currently just are happy and return. */
+
+ TCPIP_APIMSG_ACK(msg);
+}
+
+/**
+ * Create a new netconn (of a specific type) that has a callback function.
+ * The corresponding pcb is NOT created!
+ *
+ * @param t the type of 'connection' to create (@see enum netconn_type)
+ * @param proto the IP protocol for RAW IP pcbs
+ * @param callback a function to call on status changes (RX available, TX'ed)
+ * @return a newly allocated struct netconn or
+ * NULL on memory error
+ */
+struct netconn*
+netconn_alloc(enum netconn_type t, netconn_callback callback)
+{
+ static struct {
+ void *queue[DEFAULT_RAW_RECVMBOX_SIZE];
+ uint8_t dummy;
+ } sMbox;
+
+ struct netconn *conn;
+ int size;
+
+ conn = (struct netconn *)memp_malloc(MEMP_NETCONN);
+ if (conn == NULL) {
+ return NULL;
+ }
+
+ conn->last_err = ERR_OK;
+ conn->type = t;
+ conn->pcb.tcp = NULL;
+
+ /* If all sizes are the same, every compiler should optimize this switch to nothing, */
+ switch(NETCONNTYPE_GROUP(t)) {
+#if LWIP_RAW
+ case NETCONN_RAW:
+ size = DEFAULT_RAW_RECVMBOX_SIZE;
+ break;
+#endif /* LWIP_RAW */
+#if LWIP_UDP
+ case NETCONN_UDP:
+ size = DEFAULT_UDP_RECVMBOX_SIZE;
+ break;
+#endif /* LWIP_UDP */
+#if LWIP_TCP
+ case NETCONN_TCP:
+ size = DEFAULT_TCP_RECVMBOX_SIZE;
+ break;
+#endif /* LWIP_TCP */
+ default:
+ LWIP_ASSERT("netconn_alloc: undefined netconn_type", 0);
+ goto free_and_return;
+ }
+
+ if (sys_sem_new(&conn->op_completed, 0) != ERR_OK) {
+ goto free_and_return;
+ }
+
+ if(sys_mbox_new_extra(&sMbox, &conn->recvmbox, size) != ERR_OK) {
+ sys_sem_free(&conn->op_completed);
+ goto free_and_return;
+ }
+
+#if LWIP_TCP
+ sys_mbox_set_invalid(&conn->acceptmbox);
+#endif
+ conn->state = NETCONN_NONE;
+#if LWIP_SOCKET
+ /* initialize socket to -1 since 0 is a valid socket */
+ conn->socket = -1;
+#endif /* LWIP_SOCKET */
+ conn->callback = callback;
+#if LWIP_TCP
+ conn->current_msg = NULL;
+ conn->write_offset = 0;
+#endif /* LWIP_TCP */
+#if LWIP_SO_SNDTIMEO
+ conn->send_timeout = 0;
+#endif /* LWIP_SO_SNDTIMEO */
+#if LWIP_SO_RCVTIMEO
+ conn->recv_timeout = 0;
+#endif /* LWIP_SO_RCVTIMEO */
+#if LWIP_SO_RCVBUF
+ conn->recv_bufsize = RECV_BUFSIZE_DEFAULT;
+ conn->recv_avail = 0;
+#endif /* LWIP_SO_RCVBUF */
+ conn->flags = 0;
+ return conn;
+free_and_return:
+ memp_free(MEMP_NETCONN, conn);
+ return NULL;
+}
+
+/**
+ * Delete a netconn and all its resources.
+ * The pcb is NOT freed (since we might not be in the right thread context do this).
+ *
+ * @param conn the netconn to free
+ */
+void
+netconn_free(struct netconn *conn)
+{
+ LWIP_ASSERT("PCB must be deallocated outside this function", conn->pcb.tcp == NULL);
+ LWIP_ASSERT("recvmbox must be deallocated before calling this function",
+ !sys_mbox_valid(&conn->recvmbox));
+#if LWIP_TCP
+ LWIP_ASSERT("acceptmbox must be deallocated before calling this function",
+ !sys_mbox_valid(&conn->acceptmbox));
+#endif /* LWIP_TCP */
+
+ sys_sem_free(&conn->op_completed);
+ sys_sem_set_invalid(&conn->op_completed);
+
+ memp_free(MEMP_NETCONN, conn);
+}
+
+/**
+ * Delete rcvmbox and acceptmbox of a netconn and free the left-over data in
+ * these mboxes
+ *
+ * @param conn the netconn to free
+ * @bytes_drained bytes drained from recvmbox
+ * @accepts_drained pending connections drained from acceptmbox
+ */
+static void
+netconn_drain(struct netconn *conn)
+{
+ void *mem;
+#if LWIP_TCP
+ struct pbuf *p;
+#endif /* LWIP_TCP */
+
+ /* This runs in tcpip_thread, so we don't need to lock against rx packets */
+
+ /* Delete and drain the recvmbox. */
+ if (sys_mbox_valid(&conn->recvmbox)) {
+ while (sys_mbox_tryfetch(&conn->recvmbox, &mem) != SYS_MBOX_EMPTY) {
+#if LWIP_TCP
+ if (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) {
+ if(mem != NULL) {
+ p = (struct pbuf*)mem;
+ /* pcb might be set to NULL already by err_tcp() */
+ if (conn->pcb.tcp != NULL) {
+ tcp_recved(conn->pcb.tcp, p->tot_len);
+ }
+ pbuf_free(p);
+ }
+ } else
+#endif /* LWIP_TCP */
+ {
+ netbuf_delete((struct netbuf *)mem);
+ }
+ }
+ sys_mbox_free(&conn->recvmbox);
+ sys_mbox_set_invalid(&conn->recvmbox);
+ }
+
+ /* Delete and drain the acceptmbox. */
+#if LWIP_TCP
+ if (sys_mbox_valid(&conn->acceptmbox)) {
+ while (sys_mbox_tryfetch(&conn->acceptmbox, &mem) != SYS_MBOX_EMPTY) {
+ struct netconn *newconn = (struct netconn *)mem;
+ /* Only tcp pcbs have an acceptmbox, so no need to check conn->type */
+ /* pcb might be set to NULL already by err_tcp() */
+ if (conn->pcb.tcp != NULL) {
+ tcp_accepted(conn->pcb.tcp);
+ }
+ /* drain recvmbox */
+ netconn_drain(newconn);
+ if (newconn->pcb.tcp != NULL) {
+ tcp_abort(newconn->pcb.tcp);
+ newconn->pcb.tcp = NULL;
+ }
+ netconn_free(newconn);
+ }
+ sys_mbox_free(&conn->acceptmbox);
+ sys_mbox_set_invalid(&conn->acceptmbox);
+ }
+#endif /* LWIP_TCP */
+}
+
+#if LWIP_TCP
+/**
+ * Internal helper function to close a TCP netconn: since this sometimes
+ * doesn't work at the first attempt, this function is called from multiple
+ * places.
+ *
+ * @param conn the TCP netconn to close
+ */
+static void
+lwip_netconn_do_close_internal(struct netconn *conn)
+{
+ err_t err;
+ u8_t shut, shut_rx, shut_tx, close;
+
+ LWIP_ASSERT("invalid conn", (conn != NULL));
+ LWIP_ASSERT("this is for tcp netconns only", (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP));
+ LWIP_ASSERT("conn must be in state NETCONN_CLOSE", (conn->state == NETCONN_CLOSE));
+ LWIP_ASSERT("pcb already closed", (conn->pcb.tcp != NULL));
+ LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
+
+ shut = conn->current_msg->msg.sd.shut;
+ shut_rx = shut & NETCONN_SHUT_RD;
+ shut_tx = shut & NETCONN_SHUT_WR;
+ /* shutting down both ends is the same as closing */
+ close = shut == NETCONN_SHUT_RDWR;
+
+ /* Set back some callback pointers */
+ if (close) {
+ tcp_arg(conn->pcb.tcp, NULL);
+ }
+ if (conn->pcb.tcp->state == LISTEN) {
+ tcp_accept(conn->pcb.tcp, NULL);
+ } else {
+ /* some callbacks have to be reset if tcp_close is not successful */
+ if (shut_rx) {
+ tcp_recv(conn->pcb.tcp, NULL);
+ tcp_accept(conn->pcb.tcp, NULL);
+ }
+ if (shut_tx) {
+ tcp_sent(conn->pcb.tcp, NULL);
+ }
+ if (close) {
+ tcp_poll(conn->pcb.tcp, NULL, 4);
+ tcp_err(conn->pcb.tcp, NULL);
+ }
+ }
+ /* Try to close the connection */
+ if (close) {
+ err = tcp_close(conn->pcb.tcp);
+ } else {
+ err = tcp_shutdown(conn->pcb.tcp, shut_rx, shut_tx);
+ }
+ if (err == ERR_OK) {
+ /* Closing succeeded */
+ conn->current_msg->err = ERR_OK;
+ conn->current_msg = NULL;
+ conn->state = NETCONN_NONE;
+ if (close) {
+ /* Set back some callback pointers as conn is going away */
+ conn->pcb.tcp = NULL;
+ /* Trigger select() in socket layer. Make sure everybody notices activity
+ on the connection, error first! */
+ API_EVENT(conn, NETCONN_EVT_ERROR, 0);
+ }
+ if (shut_rx) {
+ API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
+ }
+ if (shut_tx) {
+ API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
+ }
+ /* wake up the application task */
+ sys_sem_signal(&conn->op_completed);
+ } else {
+ /* Closing failed, restore some of the callbacks */
+ /* Closing of listen pcb will never fail! */
+ LWIP_ASSERT("Closing a listen pcb may not fail!", (conn->pcb.tcp->state != LISTEN));
+ tcp_sent(conn->pcb.tcp, sent_tcp);
+ tcp_poll(conn->pcb.tcp, poll_tcp, 4);
+ tcp_err(conn->pcb.tcp, err_tcp);
+ tcp_arg(conn->pcb.tcp, conn);
+ /* don't restore recv callback: we don't want to receive any more data */
+ }
+ /* If closing didn't succeed, we get called again either
+ from poll_tcp or from sent_tcp */
+}
+#endif /* LWIP_TCP */
+
+/**
+ * Delete the pcb inside a netconn.
+ * Called from netconn_delete.
+ *
+ * @param msg the api_msg_msg pointing to the connection
+ */
+void
+lwip_netconn_do_delconn(struct api_msg_msg *msg)
+{
+ /* @todo TCP: abort running write/connect? */
+ if ((msg->conn->state != NETCONN_NONE) &&
+ (msg->conn->state != NETCONN_LISTEN) &&
+ (msg->conn->state != NETCONN_CONNECT)) {
+ /* this only happens for TCP netconns */
+ LWIP_ASSERT("NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP",
+ NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP);
+ msg->err = ERR_INPROGRESS;
+ } else {
+ LWIP_ASSERT("blocking connect in progress",
+ (msg->conn->state != NETCONN_CONNECT) || IN_NONBLOCKING_CONNECT(msg->conn));
+ /* Drain and delete mboxes */
+ netconn_drain(msg->conn);
+
+ if (msg->conn->pcb.tcp != NULL) {
+
+ switch (NETCONNTYPE_GROUP(msg->conn->type)) {
+#if LWIP_RAW
+ case NETCONN_RAW:
+ raw_remove(msg->conn->pcb.raw);
+ break;
+#endif /* LWIP_RAW */
+#if LWIP_UDP
+ case NETCONN_UDP:
+ msg->conn->pcb.udp->recv_arg = NULL;
+ udp_remove(msg->conn->pcb.udp);
+ break;
+#endif /* LWIP_UDP */
+#if LWIP_TCP
+ case NETCONN_TCP:
+ LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL &&
+ msg->conn->write_offset == 0);
+ msg->conn->state = NETCONN_CLOSE;
+ msg->msg.sd.shut = NETCONN_SHUT_RDWR;
+ msg->conn->current_msg = msg;
+ lwip_netconn_do_close_internal(msg->conn);
+ /* API_EVENT is called inside lwip_netconn_do_close_internal, before releasing
+ the application thread, so we can return at this point! */
+ return;
+#endif /* LWIP_TCP */
+ default:
+ break;
+ }
+ msg->conn->pcb.tcp = NULL;
+ }
+ /* tcp netconns don't come here! */
+
+ /* @todo: this lets select make the socket readable and writable,
+ which is wrong! errfd instead? */
+ API_EVENT(msg->conn, NETCONN_EVT_RCVPLUS, 0);
+ API_EVENT(msg->conn, NETCONN_EVT_SENDPLUS, 0);
+ }
+ if (sys_sem_valid(&msg->conn->op_completed)) {
+ sys_sem_signal(&msg->conn->op_completed);
+ }
+}
+
+/**
+ * Bind a pcb contained in a netconn
+ * Called from netconn_bind.
+ *
+ * @param msg the api_msg_msg pointing to the connection and containing
+ * the IP address and port to bind to
+ */
+void
+lwip_netconn_do_bind(struct api_msg_msg *msg)
+{
+ if (ERR_IS_FATAL(msg->conn->last_err)) {
+ msg->err = msg->conn->last_err;
+ } else {
+ msg->err = ERR_VAL;
+ if (msg->conn->pcb.tcp != NULL) {
+ switch (NETCONNTYPE_GROUP(msg->conn->type)) {
+#if LWIP_RAW
+ case NETCONN_RAW:
+ msg->err = raw_bind(msg->conn->pcb.raw, msg->msg.bc.ipaddr);
+ break;
+#endif /* LWIP_RAW */
+#if LWIP_UDP
+ case NETCONN_UDP:
+ msg->err = udp_bind(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
+ break;
+#endif /* LWIP_UDP */
+#if LWIP_TCP
+ case NETCONN_TCP:
+ msg->err = tcp_bind(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, msg->msg.bc.port);
+ break;
+#endif /* LWIP_TCP */
+ default:
+ break;
+ }
+ }
+ }
+ TCPIP_APIMSG_ACK(msg);
+}
+
+#if LWIP_TCP
+/**
+ * TCP callback function if a connection (opened by tcp_connect/lwip_netconn_do_connect) has
+ * been established (or reset by the remote host).
+ *
+ * @see tcp.h (struct tcp_pcb.connected) for parameters and return values
+ */
+static err_t
+lwip_netconn_do_connected(void *arg, struct tcp_pcb *pcb, err_t err)
+{
+ struct netconn *conn;
+ int was_blocking;
+
+ LWIP_UNUSED_ARG(pcb);
+
+ conn = (struct netconn *)arg;
+
+ if (conn == NULL) {
+ return ERR_VAL;
+ }
+
+ LWIP_ASSERT("conn->state == NETCONN_CONNECT", conn->state == NETCONN_CONNECT);
+ LWIP_ASSERT("(conn->current_msg != NULL) || conn->in_non_blocking_connect",
+ (conn->current_msg != NULL) || IN_NONBLOCKING_CONNECT(conn));
+
+ if (conn->current_msg != NULL) {
+ conn->current_msg->err = err;
+ }
+ if ((NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) && (err == ERR_OK)) {
+ setup_tcp(conn);
+ }
+ was_blocking = !IN_NONBLOCKING_CONNECT(conn);
+ SET_NONBLOCKING_CONNECT(conn, 0);
+ conn->current_msg = NULL;
+ conn->state = NETCONN_NONE;
+ if (!was_blocking) {
+ NETCONN_SET_SAFE_ERR(conn, ERR_OK);
+ }
+ API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
+
+ if (was_blocking) {
+ sys_sem_signal(&conn->op_completed);
+ }
+ return ERR_OK;
+}
+#endif /* LWIP_TCP */
+
+/**
+ * Connect a pcb contained inside a netconn
+ * Called from netconn_connect.
+ *
+ * @param msg the api_msg_msg pointing to the connection and containing
+ * the IP address and port to connect to
+ */
+void
+lwip_netconn_do_connect(struct api_msg_msg *msg)
+{
+ if (msg->conn->pcb.tcp == NULL) {
+ /* This may happen when calling netconn_connect() a second time */
+ msg->err = ERR_CLSD;
+ if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) {
+ /* For TCP, netconn_connect() calls tcpip_apimsg(), so signal op_completed here. */
+ sys_sem_signal(&msg->conn->op_completed);
+ return;
+ }
+ } else {
+ switch (NETCONNTYPE_GROUP(msg->conn->type)) {
+#if LWIP_RAW
+ case NETCONN_RAW:
+ msg->err = raw_connect(msg->conn->pcb.raw, msg->msg.bc.ipaddr);
+ break;
+#endif /* LWIP_RAW */
+#if LWIP_UDP
+ case NETCONN_UDP:
+ msg->err = udp_connect(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
+ break;
+#endif /* LWIP_UDP */
+#if LWIP_TCP
+ case NETCONN_TCP:
+ /* Prevent connect while doing any other action. */
+ if (msg->conn->state != NETCONN_NONE) {
+ msg->err = ERR_ISCONN;
+ } else {
+ setup_tcp(msg->conn);
+ msg->err = tcp_connect(msg->conn->pcb.tcp, msg->msg.bc.ipaddr,
+ msg->msg.bc.port, lwip_netconn_do_connected);
+ if (msg->err == ERR_OK) {
+ u8_t non_blocking = netconn_is_nonblocking(msg->conn);
+ msg->conn->state = NETCONN_CONNECT;
+ SET_NONBLOCKING_CONNECT(msg->conn, non_blocking);
+ if (non_blocking) {
+ msg->err = ERR_INPROGRESS;
+ } else {
+ msg->conn->current_msg = msg;
+ /* sys_sem_signal() is called from lwip_netconn_do_connected (or err_tcp()),
+ * when the connection is established! */
+ return;
+ }
+ }
+ }
+ /* For TCP, netconn_connect() calls tcpip_apimsg(), so signal op_completed here. */
+ sys_sem_signal(&msg->conn->op_completed);
+ return;
+#endif /* LWIP_TCP */
+ default:
+ LWIP_ERROR("Invalid netconn type", 0, do{ msg->err = ERR_VAL; }while(0));
+ break;
+ }
+ }
+ /* For all other protocols, netconn_connect() calls TCPIP_APIMSG(),
+ so use TCPIP_APIMSG_ACK() here. */
+ TCPIP_APIMSG_ACK(msg);
+}
+
+/**
+ * Connect a pcb contained inside a netconn
+ * Only used for UDP netconns.
+ * Called from netconn_disconnect.
+ *
+ * @param msg the api_msg_msg pointing to the connection to disconnect
+ */
+void
+lwip_netconn_do_disconnect(struct api_msg_msg *msg)
+{
+#if LWIP_UDP
+ if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
+ udp_disconnect(msg->conn->pcb.udp);
+ msg->err = ERR_OK;
+ } else
+#endif /* LWIP_UDP */
+ {
+ msg->err = ERR_VAL;
+ }
+ TCPIP_APIMSG_ACK(msg);
+}
+
+#if LWIP_TCP
+/**
+ * Set a TCP pcb contained in a netconn into listen mode
+ * Called from netconn_listen.
+ *
+ * @param msg the api_msg_msg pointing to the connection
+ */
+void
+lwip_netconn_do_listen(struct api_msg_msg *msg)
+{
+ if (ERR_IS_FATAL(msg->conn->last_err)) {
+ msg->err = msg->conn->last_err;
+ } else {
+ msg->err = ERR_CONN;
+ if (msg->conn->pcb.tcp != NULL) {
+ if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) {
+ if (msg->conn->state == NETCONN_NONE) {
+ struct tcp_pcb* lpcb;
+#if LWIP_IPV6
+ if ((msg->conn->flags & NETCONN_FLAG_IPV6_V6ONLY) == 0) {
+#if TCP_LISTEN_BACKLOG
+ lpcb = tcp_listen_dual_with_backlog(msg->conn->pcb.tcp, msg->msg.lb.backlog);
+#else /* TCP_LISTEN_BACKLOG */
+ lpcb = tcp_listen_dual(msg->conn->pcb.tcp);
+#endif /* TCP_LISTEN_BACKLOG */
+ } else
+#endif /* LWIP_IPV6 */
+ {
+#if TCP_LISTEN_BACKLOG
+ lpcb = tcp_listen_with_backlog(msg->conn->pcb.tcp, msg->msg.lb.backlog);
+#else /* TCP_LISTEN_BACKLOG */
+ lpcb = tcp_listen(msg->conn->pcb.tcp);
+#endif /* TCP_LISTEN_BACKLOG */
+ }
+ if (lpcb == NULL) {
+ /* in this case, the old pcb is still allocated */
+ msg->err = ERR_MEM;
+ } else {
+ /* delete the recvmbox and allocate the acceptmbox */
+ if (sys_mbox_valid(&msg->conn->recvmbox)) {
+ /** @todo: should we drain the recvmbox here? */
+ sys_mbox_free(&msg->conn->recvmbox);
+ sys_mbox_set_invalid(&msg->conn->recvmbox);
+ }
+ msg->err = ERR_OK;
+ if (!sys_mbox_valid(&msg->conn->acceptmbox)) {
+ msg->err = sys_mbox_new(&msg->conn->acceptmbox, DEFAULT_ACCEPTMBOX_SIZE);
+ }
+ if (msg->err == ERR_OK) {
+ msg->conn->state = NETCONN_LISTEN;
+ msg->conn->pcb.tcp = lpcb;
+ tcp_arg(msg->conn->pcb.tcp, msg->conn);
+ tcp_accept(msg->conn->pcb.tcp, accept_function);
+ } else {
+ /* since the old pcb is already deallocated, free lpcb now */
+ tcp_close(lpcb);
+ msg->conn->pcb.tcp = NULL;
+ }
+ }
+ }
+ } else {
+ msg->err = ERR_ARG;
+ }
+ }
+ }
+ TCPIP_APIMSG_ACK(msg);
+}
+#endif /* LWIP_TCP */
+
+/**
+ * Send some data on a RAW or UDP pcb contained in a netconn
+ * Called from netconn_send
+ *
+ * @param msg the api_msg_msg pointing to the connection
+ */
+void
+lwip_netconn_do_send(struct api_msg_msg *msg)
+{
+ if (ERR_IS_FATAL(msg->conn->last_err)) {
+ msg->err = msg->conn->last_err;
+ } else {
+ msg->err = ERR_CONN;
+ if (msg->conn->pcb.tcp != NULL) {
+ switch (NETCONNTYPE_GROUP(msg->conn->type)) {
+#if LWIP_RAW
+ case NETCONN_RAW:
+ if (ipX_addr_isany(PCB_ISIPV6(msg->conn->pcb.ip), &msg->msg.b->addr)) {
+ msg->err = raw_send(msg->conn->pcb.raw, msg->msg.b->p);
+ } else {
+ msg->err = raw_sendto(msg->conn->pcb.raw, msg->msg.b->p, ipX_2_ip(&msg->msg.b->addr));
+ }
+ break;
+#endif
+#if LWIP_UDP
+ case NETCONN_UDP:
+#if LWIP_CHECKSUM_ON_COPY
+ if (ipX_addr_isany(PCB_ISIPV6(msg->conn->pcb.ip), &msg->msg.b->addr)) {
+ msg->err = udp_send_chksum(msg->conn->pcb.udp, msg->msg.b->p,
+ msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum);
+ } else {
+ msg->err = udp_sendto_chksum(msg->conn->pcb.udp, msg->msg.b->p,
+ ipX_2_ip(&msg->msg.b->addr), msg->msg.b->port,
+ msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum);
+ }
+#else /* LWIP_CHECKSUM_ON_COPY */
+ if (ipX_addr_isany(PCB_ISIPV6(msg->conn->pcb.ip), &msg->msg.b->addr)) {
+ msg->err = udp_send(msg->conn->pcb.udp, msg->msg.b->p);
+ } else {
+ msg->err = udp_sendto(msg->conn->pcb.udp, msg->msg.b->p, ipX_2_ip(&msg->msg.b->addr), msg->msg.b->port);
+ }
+#endif /* LWIP_CHECKSUM_ON_COPY */
+ break;
+#endif /* LWIP_UDP */
+ default:
+ break;
+ }
+ }
+ }
+ TCPIP_APIMSG_ACK(msg);
+}
+
+#if LWIP_TCP
+/**
+ * Indicate data has been received from a TCP pcb contained in a netconn
+ * Called from netconn_recv
+ *
+ * @param msg the api_msg_msg pointing to the connection
+ */
+void
+lwip_netconn_do_recv(struct api_msg_msg *msg)
+{
+ msg->err = ERR_OK;
+ if (msg->conn->pcb.tcp != NULL) {
+ if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) {
+#if TCP_LISTEN_BACKLOG
+ if (msg->conn->pcb.tcp->state == LISTEN) {
+ tcp_accepted(msg->conn->pcb.tcp);
+ } else
+#endif /* TCP_LISTEN_BACKLOG */
+ {
+ u32_t remaining = msg->msg.r.len;
+ do {
+ u16_t recved = (remaining > 0xffff) ? 0xffff : (u16_t)remaining;
+ tcp_recved(msg->conn->pcb.tcp, recved);
+ remaining -= recved;
+ }while(remaining != 0);
+ }
+ }
+ }
+ TCPIP_APIMSG_ACK(msg);
+}
+
+/**
+ * See if more data needs to be written from a previous call to netconn_write.
+ * Called initially from lwip_netconn_do_write. If the first call can't send all data
+ * (because of low memory or empty send-buffer), this function is called again
+ * from sent_tcp() or poll_tcp() to send more data. If all data is sent, the
+ * blocking application thread (waiting in netconn_write) is released.
+ *
+ * @param conn netconn (that is currently in state NETCONN_WRITE) to process
+ * @return ERR_OK
+ * ERR_MEM if LWIP_TCPIP_CORE_LOCKING=1 and sending hasn't yet finished
+ */
+static err_t
+lwip_netconn_do_writemore(struct netconn *conn)
+{
+ err_t err;
+ void *dataptr;
+ u16_t len, available;
+ u8_t write_finished = 0;
+ size_t diff;
+ u8_t dontblock = netconn_is_nonblocking(conn) ||
+ (conn->current_msg->msg.w.apiflags & NETCONN_DONTBLOCK);
+ u8_t apiflags = conn->current_msg->msg.w.apiflags;
+
+ LWIP_ASSERT("conn != NULL", conn != NULL);
+ LWIP_ASSERT("conn->state == NETCONN_WRITE", (conn->state == NETCONN_WRITE));
+ LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL);
+ LWIP_ASSERT("conn->pcb.tcp != NULL", conn->pcb.tcp != NULL);
+ LWIP_ASSERT("conn->write_offset < conn->current_msg->msg.w.len",
+ conn->write_offset < conn->current_msg->msg.w.len);
+
+#if LWIP_SO_SNDTIMEO
+ if ((conn->send_timeout != 0) &&
+ ((s32_t)(sys_now() - conn->current_msg->msg.w.time_started) >= conn->send_timeout)) {
+ write_finished = 1;
+ if (conn->write_offset == 0) {
+ /* nothing has been written */
+ err = ERR_WOULDBLOCK;
+ conn->current_msg->msg.w.len = 0;
+ } else {
+ /* partial write */
+ err = ERR_OK;
+ conn->current_msg->msg.w.len = conn->write_offset;
+ }
+ } else
+#endif /* LWIP_SO_SNDTIMEO */
+ {
+ dataptr = (u8_t*)conn->current_msg->msg.w.dataptr + conn->write_offset;
+ diff = conn->current_msg->msg.w.len - conn->write_offset;
+ if (diff > 0xffffUL) { /* max_u16_t */
+ len = 0xffff;
+#if LWIP_TCPIP_CORE_LOCKING
+ conn->flags |= NETCONN_FLAG_WRITE_DELAYED;
+#endif
+ apiflags |= TCP_WRITE_FLAG_MORE;
+ } else {
+ len = (u16_t)diff;
+ }
+ available = tcp_sndbuf(conn->pcb.tcp);
+ if (available < len) {
+ /* don't try to write more than sendbuf */
+ len = available;
+ if (dontblock){
+ if (!len) {
+ err = ERR_WOULDBLOCK;
+ goto err_mem;
+ }
+ } else {
+#if LWIP_TCPIP_CORE_LOCKING
+ conn->flags |= NETCONN_FLAG_WRITE_DELAYED;
+#endif
+ apiflags |= TCP_WRITE_FLAG_MORE;
+ }
+ }
+ LWIP_ASSERT("lwip_netconn_do_writemore: invalid length!", ((conn->write_offset + len) <= conn->current_msg->msg.w.len));
+ err = tcp_write(conn->pcb.tcp, dataptr, len, apiflags);
+ /* if OK or memory error, check available space */
+ if ((err == ERR_OK) || (err == ERR_MEM)) {
+err_mem:
+ if (dontblock && (len < conn->current_msg->msg.w.len)) {
+ /* non-blocking write did not write everything: mark the pcb non-writable
+ and let poll_tcp check writable space to mark the pcb writable again */
+ API_EVENT(conn, NETCONN_EVT_SENDMINUS, len);
+ conn->flags |= NETCONN_FLAG_CHECK_WRITESPACE;
+ } else if ((tcp_sndbuf(conn->pcb.tcp) <= TCP_SNDLOWAT) ||
+ (tcp_sndqueuelen(conn->pcb.tcp) >= TCP_SNDQUEUELOWAT)) {
+ /* The queued byte- or pbuf-count exceeds the configured low-water limit,
+ let select mark this pcb as non-writable. */
+ API_EVENT(conn, NETCONN_EVT_SENDMINUS, len);
+ }
+ }
+
+ if (err == ERR_OK) {
+ conn->write_offset += len;
+ if ((conn->write_offset == conn->current_msg->msg.w.len) || dontblock) {
+ /* return sent length */
+ conn->current_msg->msg.w.len = conn->write_offset;
+ /* everything was written */
+ write_finished = 1;
+ conn->write_offset = 0;
+ }
+ tcp_output(conn->pcb.tcp);
+ } else if ((err == ERR_MEM) && !dontblock) {
+ /* If ERR_MEM, we wait for sent_tcp or poll_tcp to be called
+ we do NOT return to the application thread, since ERR_MEM is
+ only a temporary error! */
+
+ /* tcp_write returned ERR_MEM, try tcp_output anyway */
+ tcp_output(conn->pcb.tcp);
+
+#if LWIP_TCPIP_CORE_LOCKING
+ conn->flags |= NETCONN_FLAG_WRITE_DELAYED;
+#endif
+ } else {
+ /* On errors != ERR_MEM, we don't try writing any more but return
+ the error to the application thread. */
+ write_finished = 1;
+ conn->current_msg->msg.w.len = 0;
+ }
+ }
+ if (write_finished) {
+ /* everything was written: set back connection state
+ and back to application task */
+ conn->current_msg->err = err;
+ conn->current_msg = NULL;
+ conn->state = NETCONN_NONE;
+#if LWIP_TCPIP_CORE_LOCKING
+ if ((conn->flags & NETCONN_FLAG_WRITE_DELAYED) != 0)
+#endif
+ {
+ sys_sem_signal(&conn->op_completed);
+ }
+ }
+#if LWIP_TCPIP_CORE_LOCKING
+ else
+ return ERR_MEM;
+#endif
+ return ERR_OK;
+}
+#endif /* LWIP_TCP */
+
+/**
+ * Send some data on a TCP pcb contained in a netconn
+ * Called from netconn_write
+ *
+ * @param msg the api_msg_msg pointing to the connection
+ */
+void
+lwip_netconn_do_write(struct api_msg_msg *msg)
+{
+ if (ERR_IS_FATAL(msg->conn->last_err)) {
+ msg->err = msg->conn->last_err;
+ } else {
+ if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) {
+#if LWIP_TCP
+ if (msg->conn->state != NETCONN_NONE) {
+ /* netconn is connecting, closing or in blocking write */
+ msg->err = ERR_INPROGRESS;
+ } else if (msg->conn->pcb.tcp != NULL) {
+ msg->conn->state = NETCONN_WRITE;
+ /* set all the variables used by lwip_netconn_do_writemore */
+ LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL &&
+ msg->conn->write_offset == 0);
+ LWIP_ASSERT("msg->msg.w.len != 0", msg->msg.w.len != 0);
+ msg->conn->current_msg = msg;
+ msg->conn->write_offset = 0;
+#if LWIP_TCPIP_CORE_LOCKING
+ msg->conn->flags &= ~NETCONN_FLAG_WRITE_DELAYED;
+ if (lwip_netconn_do_writemore(msg->conn) != ERR_OK) {
+ LWIP_ASSERT("state!", msg->conn->state == NETCONN_WRITE);
+ UNLOCK_TCPIP_CORE();
+ sys_arch_sem_wait(&msg->conn->op_completed, 0);
+ LOCK_TCPIP_CORE();
+ LWIP_ASSERT("state!", msg->conn->state == NETCONN_NONE);
+ }
+#else /* LWIP_TCPIP_CORE_LOCKING */
+ lwip_netconn_do_writemore(msg->conn);
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+ /* for both cases: if lwip_netconn_do_writemore was called, don't ACK the APIMSG
+ since lwip_netconn_do_writemore ACKs it! */
+ return;
+ } else {
+ msg->err = ERR_CONN;
+ }
+#else /* LWIP_TCP */
+ msg->err = ERR_VAL;
+#endif /* LWIP_TCP */
+#if (LWIP_UDP || LWIP_RAW)
+ } else {
+ msg->err = ERR_VAL;
+#endif /* (LWIP_UDP || LWIP_RAW) */
+ }
+ }
+ TCPIP_APIMSG_ACK(msg);
+}
+
+/**
+ * Return a connection's local or remote address
+ * Called from netconn_getaddr
+ *
+ * @param msg the api_msg_msg pointing to the connection
+ */
+void
+lwip_netconn_do_getaddr(struct api_msg_msg *msg)
+{
+ if (msg->conn->pcb.ip != NULL) {
+ if (msg->msg.ad.local) {
+ ipX_addr_copy(PCB_ISIPV6(msg->conn->pcb.ip), *(msg->msg.ad.ipaddr),
+ msg->conn->pcb.ip->local_ip);
+ } else {
+ ipX_addr_copy(PCB_ISIPV6(msg->conn->pcb.ip), *(msg->msg.ad.ipaddr),
+ msg->conn->pcb.ip->remote_ip);
+ }
+ msg->err = ERR_OK;
+ switch (NETCONNTYPE_GROUP(msg->conn->type)) {
+#if LWIP_RAW
+ case NETCONN_RAW:
+ if (msg->msg.ad.local) {
+ *(msg->msg.ad.port) = msg->conn->pcb.raw->protocol;
+ } else {
+ /* return an error as connecting is only a helper for upper layers */
+ msg->err = ERR_CONN;
+ }
+ break;
+#endif /* LWIP_RAW */
+#if LWIP_UDP
+ case NETCONN_UDP:
+ if (msg->msg.ad.local) {
+ *(msg->msg.ad.port) = msg->conn->pcb.udp->local_port;
+ } else {
+ if ((msg->conn->pcb.udp->flags & UDP_FLAGS_CONNECTED) == 0) {
+ msg->err = ERR_CONN;
+ } else {
+ *(msg->msg.ad.port) = msg->conn->pcb.udp->remote_port;
+ }
+ }
+ break;
+#endif /* LWIP_UDP */
+#if LWIP_TCP
+ case NETCONN_TCP:
+ *(msg->msg.ad.port) = (msg->msg.ad.local?msg->conn->pcb.tcp->local_port:msg->conn->pcb.tcp->remote_port);
+ break;
+#endif /* LWIP_TCP */
+ default:
+ LWIP_ASSERT("invalid netconn_type", 0);
+ break;
+ }
+ } else {
+ msg->err = ERR_CONN;
+ }
+ TCPIP_APIMSG_ACK(msg);
+}
+
+/**
+ * Close a TCP pcb contained in a netconn
+ * Called from netconn_close
+ *
+ * @param msg the api_msg_msg pointing to the connection
+ */
+void
+lwip_netconn_do_close(struct api_msg_msg *msg)
+{
+#if LWIP_TCP
+ /* @todo: abort running write/connect? */
+ if ((msg->conn->state != NETCONN_NONE) && (msg->conn->state != NETCONN_LISTEN)) {
+ /* this only happens for TCP netconns */
+ LWIP_ASSERT("NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP",
+ NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP);
+ msg->err = ERR_INPROGRESS;
+ } else if ((msg->conn->pcb.tcp != NULL) && (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP)) {
+ if ((msg->msg.sd.shut != NETCONN_SHUT_RDWR) && (msg->conn->state == NETCONN_LISTEN)) {
+ /* LISTEN doesn't support half shutdown */
+ msg->err = ERR_CONN;
+ } else {
+ if (msg->msg.sd.shut & NETCONN_SHUT_RD) {
+ /* Drain and delete mboxes */
+ netconn_drain(msg->conn);
+ }
+ LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL &&
+ msg->conn->write_offset == 0);
+ msg->conn->state = NETCONN_CLOSE;
+ msg->conn->current_msg = msg;
+ lwip_netconn_do_close_internal(msg->conn);
+ /* for tcp netconns, lwip_netconn_do_close_internal ACKs the message */
+ return;
+ }
+ } else
+#endif /* LWIP_TCP */
+ {
+ msg->err = ERR_VAL;
+ }
+ sys_sem_signal(&msg->conn->op_completed);
+}
+
+#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD)
+/**
+ * Join multicast groups for UDP netconns.
+ * Called from netconn_join_leave_group
+ *
+ * @param msg the api_msg_msg pointing to the connection
+ */
+void
+lwip_netconn_do_join_leave_group(struct api_msg_msg *msg)
+{
+ if (ERR_IS_FATAL(msg->conn->last_err)) {
+ msg->err = msg->conn->last_err;
+ } else {
+ if (msg->conn->pcb.tcp != NULL) {
+ if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
+#if LWIP_UDP
+#if LWIP_IPV6 && LWIP_IPV6_MLD
+ if (PCB_ISIPV6(msg->conn->pcb.udp)) {
+ if (msg->msg.jl.join_or_leave == NETCONN_JOIN) {
+ msg->err = mld6_joingroup(ipX_2_ip6(msg->msg.jl.netif_addr),
+ ipX_2_ip6(msg->msg.jl.multiaddr));
+ } else {
+ msg->err = mld6_leavegroup(ipX_2_ip6(msg->msg.jl.netif_addr),
+ ipX_2_ip6(msg->msg.jl.multiaddr));
+ }
+ }
+ else
+#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
+ {
+#if LWIP_IGMP
+ if (msg->msg.jl.join_or_leave == NETCONN_JOIN) {
+ msg->err = igmp_joingroup(ipX_2_ip(msg->msg.jl.netif_addr),
+ ipX_2_ip(msg->msg.jl.multiaddr));
+ } else {
+ msg->err = igmp_leavegroup(ipX_2_ip(msg->msg.jl.netif_addr),
+ ipX_2_ip(msg->msg.jl.multiaddr));
+ }
+#endif /* LWIP_IGMP */
+ }
+#endif /* LWIP_UDP */
+#if (LWIP_TCP || LWIP_RAW)
+ } else {
+ msg->err = ERR_VAL;
+#endif /* (LWIP_TCP || LWIP_RAW) */
+ }
+ } else {
+ msg->err = ERR_CONN;
+ }
+ }
+ TCPIP_APIMSG_ACK(msg);
+}
+#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */
+
+#if LWIP_DNS
+/**
+ * Callback function that is called when DNS name is resolved
+ * (or on timeout). A waiting application thread is waked up by
+ * signaling the semaphore.
+ */
+static void
+lwip_netconn_do_dns_found(const char *name, ip_addr_t *ipaddr, void *arg)
+{
+ struct dns_api_msg *msg = (struct dns_api_msg*)arg;
+
+ LWIP_ASSERT("DNS response for wrong host name", strcmp(msg->name, name) == 0);
+ LWIP_UNUSED_ARG(name);
+
+ if (ipaddr == NULL) {
+ /* timeout or memory error */
+ *msg->err = ERR_VAL;
+ } else {
+ /* address was resolved */
+ *msg->err = ERR_OK;
+ *msg->addr = *ipaddr;
+ }
+ /* wake up the application task waiting in netconn_gethostbyname */
+ sys_sem_signal(msg->sem);
+}
+
+/**
+ * Execute a DNS query
+ * Called from netconn_gethostbyname
+ *
+ * @param arg the dns_api_msg pointing to the query
+ */
+void
+lwip_netconn_do_gethostbyname(void *arg)
+{
+ struct dns_api_msg *msg = (struct dns_api_msg*)arg;
+
+ *msg->err = dns_gethostbyname(msg->name, msg->addr, lwip_netconn_do_dns_found, msg);
+ if (*msg->err != ERR_INPROGRESS) {
+ /* on error or immediate success, wake up the application
+ * task waiting in netconn_gethostbyname */
+ sys_sem_signal(msg->sem);
+ }
+}
+#endif /* LWIP_DNS */
+
+#endif /* LWIP_NETCONN */
diff --git a/lwip/src/api/err.c b/lwip/src/api/err.c
new file mode 100644
index 0000000..92fa8b7
--- /dev/null
+++ b/lwip/src/api/err.c
@@ -0,0 +1,75 @@
+/**
+ * @file
+ * Error Management module
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/err.h"
+
+#ifdef LWIP_DEBUG
+
+static const char *err_strerr[] = {
+ "Ok.", /* ERR_OK 0 */
+ "Out of memory error.", /* ERR_MEM -1 */
+ "Buffer error.", /* ERR_BUF -2 */
+ "Timeout.", /* ERR_TIMEOUT -3 */
+ "Routing problem.", /* ERR_RTE -4 */
+ "Operation in progress.", /* ERR_INPROGRESS -5 */
+ "Illegal value.", /* ERR_VAL -6 */
+ "Operation would block.", /* ERR_WOULDBLOCK -7 */
+ "Address in use.", /* ERR_USE -8 */
+ "Already connected.", /* ERR_ISCONN -9 */
+ "Connection aborted.", /* ERR_ABRT -10 */
+ "Connection reset.", /* ERR_RST -11 */
+ "Connection closed.", /* ERR_CLSD -12 */
+ "Not connected.", /* ERR_CONN -13 */
+ "Illegal argument.", /* ERR_ARG -14 */
+ "Low-level netif error.", /* ERR_IF -15 */
+};
+
+/**
+ * Convert an lwip internal error to a string representation.
+ *
+ * @param err an lwip internal err_t
+ * @return a string representation for err
+ */
+const char *
+lwip_strerr(err_t err)
+{
+ return err_strerr[-err];
+
+}
+
+#endif /* LWIP_DEBUG */
diff --git a/lwip/src/api/netbuf.c b/lwip/src/api/netbuf.c
new file mode 100644
index 0000000..0ccd2bc
--- /dev/null
+++ b/lwip/src/api/netbuf.c
@@ -0,0 +1,245 @@
+/**
+ * @file
+ * Network buffer management
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/netbuf.h"
+#include "lwip/memp.h"
+
+#include <string.h>
+
+/**
+ * Create (allocate) and initialize a new netbuf.
+ * The netbuf doesn't yet contain a packet buffer!
+ *
+ * @return a pointer to a new netbuf
+ * NULL on lack of memory
+ */
+struct
+netbuf *netbuf_new(void)
+{
+ struct netbuf *buf;
+
+ buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
+ if (buf != NULL) {
+ buf->p = NULL;
+ buf->ptr = NULL;
+ ipX_addr_set_any(LWIP_IPV6, &buf->addr);
+ buf->port = 0;
+#if LWIP_NETBUF_RECVINFO || LWIP_CHECKSUM_ON_COPY
+#if LWIP_CHECKSUM_ON_COPY
+ buf->flags = 0;
+#endif /* LWIP_CHECKSUM_ON_COPY */
+ buf->toport_chksum = 0;
+#if LWIP_NETBUF_RECVINFO
+ ipX_addr_set_any(LWIP_IPV6, &buf->toaddr);
+#endif /* LWIP_NETBUF_RECVINFO */
+#endif /* LWIP_NETBUF_RECVINFO || LWIP_CHECKSUM_ON_COPY */
+ return buf;
+ } else {
+ return NULL;
+ }
+}
+
+/**
+ * Deallocate a netbuf allocated by netbuf_new().
+ *
+ * @param buf pointer to a netbuf allocated by netbuf_new()
+ */
+void
+netbuf_delete(struct netbuf *buf)
+{
+ if (buf != NULL) {
+ if (buf->p != NULL) {
+ pbuf_free(buf->p);
+ buf->p = buf->ptr = NULL;
+ }
+ memp_free(MEMP_NETBUF, buf);
+ }
+}
+
+/**
+ * Allocate memory for a packet buffer for a given netbuf.
+ *
+ * @param buf the netbuf for which to allocate a packet buffer
+ * @param size the size of the packet buffer to allocate
+ * @return pointer to the allocated memory
+ * NULL if no memory could be allocated
+ */
+void *
+netbuf_alloc(struct netbuf *buf, u16_t size)
+{
+ LWIP_ERROR("netbuf_alloc: invalid buf", (buf != NULL), return NULL;);
+
+ /* Deallocate any previously allocated memory. */
+ if (buf->p != NULL) {
+ pbuf_free(buf->p);
+ }
+ buf->p = pbuf_alloc(PBUF_TRANSPORT, size, PBUF_RAM);
+ if (buf->p == NULL) {
+ return NULL;
+ }
+ LWIP_ASSERT("check that first pbuf can hold size",
+ (buf->p->len >= size));
+ buf->ptr = buf->p;
+ return buf->p->payload;
+}
+
+/**
+ * Free the packet buffer included in a netbuf
+ *
+ * @param buf pointer to the netbuf which contains the packet buffer to free
+ */
+void
+netbuf_free(struct netbuf *buf)
+{
+ LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return;);
+ if (buf->p != NULL) {
+ pbuf_free(buf->p);
+ }
+ buf->p = buf->ptr = NULL;
+}
+
+/**
+ * Let a netbuf reference existing (non-volatile) data.
+ *
+ * @param buf netbuf which should reference the data
+ * @param dataptr pointer to the data to reference
+ * @param size size of the data
+ * @return ERR_OK if data is referenced
+ * ERR_MEM if data couldn't be referenced due to lack of memory
+ */
+err_t
+netbuf_ref(struct netbuf *buf, const void *dataptr, u16_t size)
+{
+ LWIP_ERROR("netbuf_ref: invalid buf", (buf != NULL), return ERR_ARG;);
+ if (buf->p != NULL) {
+ pbuf_free(buf->p);
+ }
+ buf->p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_REF);
+ if (buf->p == NULL) {
+ buf->ptr = NULL;
+ return ERR_MEM;
+ }
+ buf->p->payload = (void*)dataptr;
+ buf->p->len = buf->p->tot_len = size;
+ buf->ptr = buf->p;
+ return ERR_OK;
+}
+
+/**
+ * Chain one netbuf to another (@see pbuf_chain)
+ *
+ * @param head the first netbuf
+ * @param tail netbuf to chain after head, freed by this function, may not be reference after returning
+ */
+void
+netbuf_chain(struct netbuf *head, struct netbuf *tail)
+{
+ LWIP_ERROR("netbuf_ref: invalid head", (head != NULL), return;);
+ LWIP_ERROR("netbuf_chain: invalid tail", (tail != NULL), return;);
+ pbuf_cat(head->p, tail->p);
+ head->ptr = head->p;
+ memp_free(MEMP_NETBUF, tail);
+}
+
+/**
+ * Get the data pointer and length of the data inside a netbuf.
+ *
+ * @param buf netbuf to get the data from
+ * @param dataptr pointer to a void pointer where to store the data pointer
+ * @param len pointer to an u16_t where the length of the data is stored
+ * @return ERR_OK if the information was retreived,
+ * ERR_BUF on error.
+ */
+err_t
+netbuf_data(struct netbuf *buf, void **dataptr, u16_t *len)
+{
+ LWIP_ERROR("netbuf_data: invalid buf", (buf != NULL), return ERR_ARG;);
+ LWIP_ERROR("netbuf_data: invalid dataptr", (dataptr != NULL), return ERR_ARG;);
+ LWIP_ERROR("netbuf_data: invalid len", (len != NULL), return ERR_ARG;);
+
+ if (buf->ptr == NULL) {
+ return ERR_BUF;
+ }
+ *dataptr = buf->ptr->payload;
+ *len = buf->ptr->len;
+ return ERR_OK;
+}
+
+/**
+ * Move the current data pointer of a packet buffer contained in a netbuf
+ * to the next part.
+ * The packet buffer itself is not modified.
+ *
+ * @param buf the netbuf to modify
+ * @return -1 if there is no next part
+ * 1 if moved to the next part but now there is no next part
+ * 0 if moved to the next part and there are still more parts
+ */
+s8_t
+netbuf_next(struct netbuf *buf)
+{
+ LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return -1;);
+ if (buf->ptr->next == NULL) {
+ return -1;
+ }
+ buf->ptr = buf->ptr->next;
+ if (buf->ptr->next == NULL) {
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * Move the current data pointer of a packet buffer contained in a netbuf
+ * to the beginning of the packet.
+ * The packet buffer itself is not modified.
+ *
+ * @param buf the netbuf to modify
+ */
+void
+netbuf_first(struct netbuf *buf)
+{
+ LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return;);
+ buf->ptr = buf->p;
+}
+
+#endif /* LWIP_NETCONN */
diff --git a/lwip/src/api/netdb.c b/lwip/src/api/netdb.c
new file mode 100644
index 0000000..6a4bac5
--- /dev/null
+++ b/lwip/src/api/netdb.c
@@ -0,0 +1,353 @@
+/**
+ * @file
+ * API functions for name resolving
+ *
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmidt
+ *
+ */
+
+#include "lwip/netdb.h"
+
+#if LWIP_DNS && LWIP_SOCKET
+
+#include "lwip/err.h"
+#include "lwip/mem.h"
+#include "lwip/memp.h"
+#include "lwip/ip_addr.h"
+#include "lwip/api.h"
+#include "lwip/dns.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+/** helper struct for gethostbyname_r to access the char* buffer */
+struct gethostbyname_r_helper {
+ ip_addr_t *addr_list[2];
+ ip_addr_t addr;
+ char *aliases;
+};
+
+/** h_errno is exported in netdb.h for access by applications. */
+#if LWIP_DNS_API_DECLARE_H_ERRNO
+int h_errno;
+#endif /* LWIP_DNS_API_DECLARE_H_ERRNO */
+
+/** define "hostent" variables storage: 0 if we use a static (but unprotected)
+ * set of variables for lwip_gethostbyname, 1 if we use a local storage */
+#ifndef LWIP_DNS_API_HOSTENT_STORAGE
+#define LWIP_DNS_API_HOSTENT_STORAGE 0
+#endif
+
+/** define "hostent" variables storage */
+#if LWIP_DNS_API_HOSTENT_STORAGE
+#define HOSTENT_STORAGE
+#else
+#define HOSTENT_STORAGE static
+#endif /* LWIP_DNS_API_STATIC_HOSTENT */
+
+/**
+ * Returns an entry containing addresses of address family AF_INET
+ * for the host with name name.
+ * Due to dns_gethostbyname limitations, only one address is returned.
+ *
+ * @param name the hostname to resolve
+ * @return an entry containing addresses of address family AF_INET
+ * for the host with name name
+ */
+struct hostent*
+lwip_gethostbyname(const char *name)
+{
+ err_t err;
+ ip_addr_t addr;
+
+ /* buffer variables for lwip_gethostbyname() */
+ HOSTENT_STORAGE struct hostent s_hostent;
+ HOSTENT_STORAGE char *s_aliases;
+ HOSTENT_STORAGE ip_addr_t s_hostent_addr;
+ HOSTENT_STORAGE ip_addr_t *s_phostent_addr[2];
+
+ /* query host IP address */
+ err = netconn_gethostbyname(name, &addr);
+ if (err != ERR_OK) {
+ LWIP_DEBUGF(DNS_DEBUG, ("lwip_gethostbyname(%s) failed, err=%d\n", name, err));
+ h_errno = HOST_NOT_FOUND;
+ return NULL;
+ }
+
+ /* fill hostent */
+ s_hostent_addr = addr;
+ s_phostent_addr[0] = &s_hostent_addr;
+ s_phostent_addr[1] = NULL;
+ s_hostent.h_name = (char*)name;
+ s_hostent.h_aliases = &s_aliases;
+ s_hostent.h_addrtype = AF_INET;
+ s_hostent.h_length = sizeof(ip_addr_t);
+ s_hostent.h_addr_list = (char**)&s_phostent_addr;
+
+#if DNS_DEBUG
+ /* dump hostent */
+ LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_name == %s\n", s_hostent.h_name));
+ LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_aliases == %p\n", s_hostent.h_aliases));
+ if (s_hostent.h_aliases != NULL) {
+ u8_t idx;
+ for ( idx=0; s_hostent.h_aliases[idx]; idx++) {
+ LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_aliases[%i]-> == %p\n", idx, s_hostent.h_aliases[idx]));
+ LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_aliases[%i]-> == %s\n", idx, s_hostent.h_aliases[idx]));
+ }
+ }
+ LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addrtype == %d\n", s_hostent.h_addrtype));
+ LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_length == %d\n", s_hostent.h_length));
+ LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addr_list == %p\n", s_hostent.h_addr_list));
+ if (s_hostent.h_addr_list != NULL) {
+ u8_t idx;
+ for ( idx=0; s_hostent.h_addr_list[idx]; idx++) {
+ LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addr_list[%i] == %p\n", idx, s_hostent.h_addr_list[idx]));
+ LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addr_list[%i]-> == %s\n", idx, ip_ntoa((ip_addr_t*)s_hostent.h_addr_list[idx])));
+ }
+ }
+#endif /* DNS_DEBUG */
+
+#if LWIP_DNS_API_HOSTENT_STORAGE
+ /* this function should return the "per-thread" hostent after copy from s_hostent */
+ return sys_thread_hostent(&s_hostent);
+#else
+ return &s_hostent;
+#endif /* LWIP_DNS_API_HOSTENT_STORAGE */
+}
+
+/**
+ * Thread-safe variant of lwip_gethostbyname: instead of using a static
+ * buffer, this function takes buffer and errno pointers as arguments
+ * and uses these for the result.
+ *
+ * @param name the hostname to resolve
+ * @param ret pre-allocated struct where to store the result
+ * @param buf pre-allocated buffer where to store additional data
+ * @param buflen the size of buf
+ * @param result pointer to a hostent pointer that is set to ret on success
+ * and set to zero on error
+ * @param h_errnop pointer to an int where to store errors (instead of modifying
+ * the global h_errno)
+ * @return 0 on success, non-zero on error, additional error information
+ * is stored in *h_errnop instead of h_errno to be thread-safe
+ */
+int
+lwip_gethostbyname_r(const char *name, struct hostent *ret, char *buf,
+ size_t buflen, struct hostent **result, int *h_errnop)
+{
+ err_t err;
+ struct gethostbyname_r_helper *h;
+ char *hostname;
+ size_t namelen;
+ int lh_errno;
+
+ if (h_errnop == NULL) {
+ /* ensure h_errnop is never NULL */
+ h_errnop = &lh_errno;
+ }
+
+ if (result == NULL) {
+ /* not all arguments given */
+ *h_errnop = EINVAL;
+ return -1;
+ }
+ /* first thing to do: set *result to nothing */
+ *result = NULL;
+ if ((name == NULL) || (ret == NULL) || (buf == NULL)) {
+ /* not all arguments given */
+ *h_errnop = EINVAL;
+ return -1;
+ }
+
+ namelen = strlen(name);
+ if (buflen < (sizeof(struct gethostbyname_r_helper) + namelen + 1 + (MEM_ALIGNMENT - 1))) {
+ /* buf can't hold the data needed + a copy of name */
+ *h_errnop = ERANGE;
+ return -1;
+ }
+
+ h = (struct gethostbyname_r_helper*)LWIP_MEM_ALIGN(buf);
+ hostname = ((char*)h) + sizeof(struct gethostbyname_r_helper);
+
+ /* query host IP address */
+ err = netconn_gethostbyname(name, &h->addr);
+ if (err != ERR_OK) {
+ LWIP_DEBUGF(DNS_DEBUG, ("lwip_gethostbyname(%s) failed, err=%d\n", name, err));
+ *h_errnop = HOST_NOT_FOUND;
+ return -1;
+ }
+
+ /* copy the hostname into buf */
+ MEMCPY(hostname, name, namelen);
+ hostname[namelen] = 0;
+
+ /* fill hostent */
+ h->addr_list[0] = &h->addr;
+ h->addr_list[1] = NULL;
+ h->aliases = NULL;
+ ret->h_name = hostname;
+ ret->h_aliases = &h->aliases;
+ ret->h_addrtype = AF_INET;
+ ret->h_length = sizeof(ip_addr_t);
+ ret->h_addr_list = (char**)&h->addr_list;
+
+ /* set result != NULL */
+ *result = ret;
+
+ /* return success */
+ return 0;
+}
+
+/**
+ * Frees one or more addrinfo structures returned by getaddrinfo(), along with
+ * any additional storage associated with those structures. If the ai_next field
+ * of the structure is not null, the entire list of structures is freed.
+ *
+ * @param ai struct addrinfo to free
+ */
+void
+lwip_freeaddrinfo(struct addrinfo *ai)
+{
+ struct addrinfo *next;
+
+ while (ai != NULL) {
+ next = ai->ai_next;
+ memp_free(MEMP_NETDB, ai);
+ ai = next;
+ }
+}
+
+/**
+ * Translates the name of a service location (for example, a host name) and/or
+ * a service name and returns a set of socket addresses and associated
+ * information to be used in creating a socket with which to address the
+ * specified service.
+ * Memory for the result is allocated internally and must be freed by calling
+ * lwip_freeaddrinfo()!
+ *
+ * Due to a limitation in dns_gethostbyname, only the first address of a
+ * host is returned.
+ * Also, service names are not supported (only port numbers)!
+ *
+ * @param nodename descriptive name or address string of the host
+ * (may be NULL -> local address)
+ * @param servname port number as string of NULL
+ * @param hints structure containing input values that set socktype and protocol
+ * @param res pointer to a pointer where to store the result (set to NULL on failure)
+ * @return 0 on success, non-zero on failure
+ */
+int
+lwip_getaddrinfo(const char *nodename, const char *servname,
+ const struct addrinfo *hints, struct addrinfo **res)
+{
+ err_t err;
+ ip_addr_t addr;
+ struct addrinfo *ai;
+ struct sockaddr_in *sa = NULL;
+ int port_nr = 0;
+ size_t total_size;
+ size_t namelen = 0;
+
+ if (res == NULL) {
+ return EAI_FAIL;
+ }
+ *res = NULL;
+ if ((nodename == NULL) && (servname == NULL)) {
+ return EAI_NONAME;
+ }
+
+ if (servname != NULL) {
+ /* service name specified: convert to port number
+ * @todo?: currently, only ASCII integers (port numbers) are supported! */
+ port_nr = atoi(servname);
+ if ((port_nr <= 0) || (port_nr > 0xffff)) {
+ return EAI_SERVICE;
+ }
+ }
+
+ if (nodename != NULL) {
+ /* service location specified, try to resolve */
+ err = netconn_gethostbyname(nodename, &addr);
+ if (err != ERR_OK) {
+ return EAI_FAIL;
+ }
+ } else {
+ /* service location specified, use loopback address */
+ ip_addr_set_loopback(&addr);
+ }
+
+ total_size = sizeof(struct addrinfo) + sizeof(struct sockaddr_in);
+ if (nodename != NULL) {
+ namelen = strlen(nodename);
+ LWIP_ASSERT("namelen is too long", (namelen + 1) <= (mem_size_t)-1);
+ total_size += namelen + 1;
+ }
+ /* If this fails, please report to lwip-devel! :-) */
+ LWIP_ASSERT("total_size <= NETDB_ELEM_SIZE: please report this!",
+ total_size <= NETDB_ELEM_SIZE);
+ ai = (struct addrinfo *)memp_malloc(MEMP_NETDB);
+ if (ai == NULL) {
+ goto memerr;
+ }
+ memset(ai, 0, total_size);
+ sa = (struct sockaddr_in*)((u8_t*)ai + sizeof(struct addrinfo));
+ /* set up sockaddr */
+ inet_addr_from_ipaddr(&sa->sin_addr, &addr);
+ sa->sin_family = AF_INET;
+ sa->sin_len = sizeof(struct sockaddr_in);
+ sa->sin_port = htons((u16_t)port_nr);
+
+ /* set up addrinfo */
+ ai->ai_family = AF_INET;
+ if (hints != NULL) {
+ /* copy socktype & protocol from hints if specified */
+ ai->ai_socktype = hints->ai_socktype;
+ ai->ai_protocol = hints->ai_protocol;
+ }
+ if (nodename != NULL) {
+ /* copy nodename to canonname if specified */
+ ai->ai_canonname = ((char*)ai + sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
+ MEMCPY(ai->ai_canonname, nodename, namelen);
+ ai->ai_canonname[namelen] = 0;
+ }
+ ai->ai_addrlen = sizeof(struct sockaddr_in);
+ ai->ai_addr = (struct sockaddr*)sa;
+
+ *res = ai;
+
+ return 0;
+memerr:
+ if (ai != NULL) {
+ memp_free(MEMP_NETDB, ai);
+ }
+ return EAI_MEMORY;
+}
+
+#endif /* LWIP_DNS && LWIP_SOCKET */
diff --git a/lwip/src/api/netifapi.c b/lwip/src/api/netifapi.c
new file mode 100644
index 0000000..81403f8
--- /dev/null
+++ b/lwip/src/api/netifapi.c
@@ -0,0 +1,160 @@
+/**
+ * @file
+ * Network Interface Sequential API module
+ *
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_NETIF_API /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/netifapi.h"
+#include "lwip/tcpip.h"
+
+/**
+ * Call netif_add() inside the tcpip_thread context.
+ */
+static void
+netifapi_do_netif_add(struct netifapi_msg_msg *msg)
+{
+ if (!netif_add( msg->netif,
+ msg->msg.add.ipaddr,
+ msg->msg.add.netmask,
+ msg->msg.add.gw,
+ msg->msg.add.state,
+ msg->msg.add.init,
+ msg->msg.add.input)) {
+ msg->err = ERR_IF;
+ } else {
+ msg->err = ERR_OK;
+ }
+ TCPIP_NETIFAPI_ACK(msg);
+}
+
+/**
+ * Call netif_set_addr() inside the tcpip_thread context.
+ */
+static void
+netifapi_do_netif_set_addr(struct netifapi_msg_msg *msg)
+{
+ netif_set_addr( msg->netif,
+ msg->msg.add.ipaddr,
+ msg->msg.add.netmask,
+ msg->msg.add.gw);
+ msg->err = ERR_OK;
+ TCPIP_NETIFAPI_ACK(msg);
+}
+
+/**
+ * Call the "errtfunc" (or the "voidfunc" if "errtfunc" is NULL) inside the
+ * tcpip_thread context.
+ */
+static void
+netifapi_do_netif_common(struct netifapi_msg_msg *msg)
+{
+ if (msg->msg.common.errtfunc != NULL) {
+ msg->err = msg->msg.common.errtfunc(msg->netif);
+ } else {
+ msg->err = ERR_OK;
+ msg->msg.common.voidfunc(msg->netif);
+ }
+ TCPIP_NETIFAPI_ACK(msg);
+}
+
+/**
+ * Call netif_add() in a thread-safe way by running that function inside the
+ * tcpip_thread context.
+ *
+ * @note for params @see netif_add()
+ */
+err_t
+netifapi_netif_add(struct netif *netif,
+ ip_addr_t *ipaddr,
+ ip_addr_t *netmask,
+ ip_addr_t *gw,
+ void *state,
+ netif_init_fn init,
+ netif_input_fn input)
+{
+ struct netifapi_msg msg;
+ msg.function = netifapi_do_netif_add;
+ msg.msg.netif = netif;
+ msg.msg.msg.add.ipaddr = ipaddr;
+ msg.msg.msg.add.netmask = netmask;
+ msg.msg.msg.add.gw = gw;
+ msg.msg.msg.add.state = state;
+ msg.msg.msg.add.init = init;
+ msg.msg.msg.add.input = input;
+ TCPIP_NETIFAPI(&msg);
+ return msg.msg.err;
+}
+
+/**
+ * Call netif_set_addr() in a thread-safe way by running that function inside the
+ * tcpip_thread context.
+ *
+ * @note for params @see netif_set_addr()
+ */
+err_t
+netifapi_netif_set_addr(struct netif *netif,
+ ip_addr_t *ipaddr,
+ ip_addr_t *netmask,
+ ip_addr_t *gw)
+{
+ struct netifapi_msg msg;
+ msg.function = netifapi_do_netif_set_addr;
+ msg.msg.netif = netif;
+ msg.msg.msg.add.ipaddr = ipaddr;
+ msg.msg.msg.add.netmask = netmask;
+ msg.msg.msg.add.gw = gw;
+ TCPIP_NETIFAPI(&msg);
+ return msg.msg.err;
+}
+
+/**
+ * call the "errtfunc" (or the "voidfunc" if "errtfunc" is NULL) in a thread-safe
+ * way by running that function inside the tcpip_thread context.
+ *
+ * @note use only for functions where there is only "netif" parameter.
+ */
+err_t
+netifapi_netif_common(struct netif *netif, netifapi_void_fn voidfunc,
+ netifapi_errt_fn errtfunc)
+{
+ struct netifapi_msg msg;
+ msg.function = netifapi_do_netif_common;
+ msg.msg.netif = netif;
+ msg.msg.msg.common.voidfunc = voidfunc;
+ msg.msg.msg.common.errtfunc = errtfunc;
+ TCPIP_NETIFAPI(&msg);
+ return msg.msg.err;
+}
+
+#endif /* LWIP_NETIF_API */
diff --git a/lwip/src/api/sockets.c b/lwip/src/api/sockets.c
new file mode 100644
index 0000000..64bdb19
--- /dev/null
+++ b/lwip/src/api/sockets.c
@@ -0,0 +1,2639 @@
+/**
+ * @file
+ * Sockets BSD-Like API module
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ * Improved by Marc Boucher <marc@mbsi.ca> and David Haas <dhaas@alum.rpi.edu>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/sockets.h"
+#include "lwip/api.h"
+#include "lwip/sys.h"
+#include "lwip/igmp.h"
+#include "lwip/inet.h"
+#include "lwip/tcp.h"
+#include "lwip/raw.h"
+#include "lwip/udp.h"
+#include "lwip/tcpip.h"
+#include "lwip/pbuf.h"
+#if LWIP_CHECKSUM_ON_COPY
+#include "lwip/inet_chksum.h"
+#endif
+
+#include <string.h>
+
+#define IP4ADDR_PORT_TO_SOCKADDR(sin, ipXaddr, port) do { \
+ (sin)->sin_len = sizeof(struct sockaddr_in); \
+ (sin)->sin_family = AF_INET; \
+ (sin)->sin_port = htons((port)); \
+ inet_addr_from_ipaddr(&(sin)->sin_addr, ipX_2_ip(ipXaddr)); \
+ memset((sin)->sin_zero, 0, SIN_ZERO_LEN); }while(0)
+#define SOCKADDR4_TO_IP4ADDR_PORT(sin, ipXaddr, port) do { \
+ inet_addr_to_ipaddr(ipX_2_ip(ipXaddr), &((sin)->sin_addr)); \
+ (port) = ntohs((sin)->sin_port); }while(0)
+
+#if LWIP_IPV6
+#define IS_SOCK_ADDR_LEN_VALID(namelen) (((namelen) == sizeof(struct sockaddr_in)) || \
+ ((namelen) == sizeof(struct sockaddr_in6)))
+#define IS_SOCK_ADDR_TYPE_VALID(name) (((name)->sa_family == AF_INET) || \
+ ((name)->sa_family == AF_INET6))
+#define SOCK_ADDR_TYPE_MATCH(name, sock) \
+ ((((name)->sa_family == AF_INET) && !(NETCONNTYPE_ISIPV6((sock)->conn->type))) || \
+ (((name)->sa_family == AF_INET6) && (NETCONNTYPE_ISIPV6((sock)->conn->type))))
+#define IP6ADDR_PORT_TO_SOCKADDR(sin6, ipXaddr, port) do { \
+ (sin6)->sin6_len = sizeof(struct sockaddr_in6); \
+ (sin6)->sin6_family = AF_INET6; \
+ (sin6)->sin6_port = htons((port)); \
+ (sin6)->sin6_flowinfo = 0; \
+ inet6_addr_from_ip6addr(&(sin6)->sin6_addr, ipX_2_ip6(ipXaddr)); }while(0)
+#define IPXADDR_PORT_TO_SOCKADDR(isipv6, sockaddr, ipXaddr, port) do { \
+ if (isipv6) { \
+ IP6ADDR_PORT_TO_SOCKADDR((struct sockaddr_in6*)(void*)(sockaddr), ipXaddr, port); \
+ } else { \
+ IP4ADDR_PORT_TO_SOCKADDR((struct sockaddr_in*)(void*)(sockaddr), ipXaddr, port); \
+ } } while(0)
+#define SOCKADDR6_TO_IP6ADDR_PORT(sin6, ipXaddr, port) do { \
+ inet6_addr_to_ip6addr(ipX_2_ip6(ipXaddr), &((sin6)->sin6_addr)); \
+ (port) = ntohs((sin6)->sin6_port); }while(0)
+#define SOCKADDR_TO_IPXADDR_PORT(isipv6, sockaddr, ipXaddr, port) do { \
+ if (isipv6) { \
+ SOCKADDR6_TO_IP6ADDR_PORT((struct sockaddr_in6*)(void*)(sockaddr), ipXaddr, port); \
+ } else { \
+ SOCKADDR4_TO_IP4ADDR_PORT((struct sockaddr_in*)(void*)(sockaddr), ipXaddr, port); \
+ } } while(0)
+#define DOMAIN_TO_NETCONN_TYPE(domain, type) (((domain) == AF_INET) ? \
+ (type) : (enum netconn_type)((type) | NETCONN_TYPE_IPV6))
+#else /* LWIP_IPV6 */
+#define IS_SOCK_ADDR_LEN_VALID(namelen) ((namelen) == sizeof(struct sockaddr_in))
+#define IS_SOCK_ADDR_TYPE_VALID(name) ((name)->sa_family == AF_INET)
+#define SOCK_ADDR_TYPE_MATCH(name, sock) 1
+#define IPXADDR_PORT_TO_SOCKADDR(isipv6, sockaddr, ipXaddr, port) \
+ IP4ADDR_PORT_TO_SOCKADDR((struct sockaddr_in*)(void*)(sockaddr), ipXaddr, port)
+#define SOCKADDR_TO_IPXADDR_PORT(isipv6, sockaddr, ipXaddr, port) \
+ SOCKADDR4_TO_IP4ADDR_PORT((struct sockaddr_in*)(void*)(sockaddr), ipXaddr, port)
+#define DOMAIN_TO_NETCONN_TYPE(domain, netconn_type) (netconn_type)
+#endif /* LWIP_IPV6 */
+
+#define IS_SOCK_ADDR_TYPE_VALID_OR_UNSPEC(name) (((name)->sa_family == AF_UNSPEC) || \
+ IS_SOCK_ADDR_TYPE_VALID(name))
+#define SOCK_ADDR_TYPE_MATCH_OR_UNSPEC(name, sock) (((name)->sa_family == AF_UNSPEC) || \
+ SOCK_ADDR_TYPE_MATCH(name, sock))
+#define IS_SOCK_ADDR_ALIGNED(name) ((((mem_ptr_t)(name)) % 4) == 0)
+
+
+
+#define NUM_SOCKETS MEMP_NUM_NETCONN
+
+/** Contains all internal pointers and states used for a socket */
+struct lwip_sock {
+ /** sockets currently are built on netconns, each socket has one netconn */
+ struct netconn *conn;
+ /** data that was left from the previous read */
+ void *lastdata;
+ /** offset in the data that was left from the previous read */
+ u16_t lastoffset;
+ /** number of times data was received, set by event_callback(),
+ tested by the receive and select functions */
+ s16_t rcvevent;
+ /** number of times data was ACKed (free send buffer), set by event_callback(),
+ tested by select */
+ u16_t sendevent;
+ /** error happened for this socket, set by event_callback(), tested by select */
+ u16_t errevent;
+ /** last error that occurred on this socket */
+ int err;
+ /** counter of how many threads are waiting for this socket using select */
+ int select_waiting;
+};
+
+/** Description for a task waiting in select */
+struct lwip_select_cb {
+ /** Pointer to the next waiting task */
+ struct lwip_select_cb *next;
+ /** Pointer to the previous waiting task */
+ struct lwip_select_cb *prev;
+ /** readset passed to select */
+ fd_set *readset;
+ /** writeset passed to select */
+ fd_set *writeset;
+ /** unimplemented: exceptset passed to select */
+ fd_set *exceptset;
+ /** don't signal the same semaphore twice: set to 1 when signalled */
+ int sem_signalled;
+ /** semaphore to wake up a task waiting for select */
+ sys_sem_t sem;
+};
+
+/** This struct is used to pass data to the set/getsockopt_internal
+ * functions running in tcpip_thread context (only a void* is allowed) */
+struct lwip_setgetsockopt_data {
+ /** socket struct for which to change options */
+ struct lwip_sock *sock;
+#ifdef LWIP_DEBUG
+ /** socket index for which to change options */
+ int s;
+#endif /* LWIP_DEBUG */
+ /** level of the option to process */
+ int level;
+ /** name of the option to process */
+ int optname;
+ /** set: value to set the option to
+ * get: value of the option is stored here */
+ void *optval;
+ /** size of *optval */
+ socklen_t *optlen;
+ /** if an error occures, it is temporarily stored here */
+ err_t err;
+};
+
+/** A struct sockaddr replacement that has the same alignment as sockaddr_in/
+ * sockaddr_in6 if instantiated.
+ */
+union sockaddr_aligned {
+ struct sockaddr sa;
+#if LWIP_IPV6
+ struct sockaddr_in6 sin6;
+#endif /* LWIP_IPV6 */
+ struct sockaddr_in sin;
+};
+
+
+/** The global array of available sockets */
+static struct lwip_sock sockets[NUM_SOCKETS];
+/** The global list of tasks waiting for select */
+static struct lwip_select_cb *select_cb_list;
+/** This counter is increased from lwip_select when the list is chagned
+ and checked in event_callback to see if it has changed. */
+static volatile int select_cb_ctr;
+
+/** Table to quickly map an lwIP error (err_t) to a socket error
+ * by using -err as an index */
+static const int err_to_errno_table[] = {
+ 0, /* ERR_OK 0 No error, everything OK. */
+ ENOMEM, /* ERR_MEM -1 Out of memory error. */
+ ENOBUFS, /* ERR_BUF -2 Buffer error. */
+ EWOULDBLOCK, /* ERR_TIMEOUT -3 Timeout */
+ EHOSTUNREACH, /* ERR_RTE -4 Routing problem. */
+ EINPROGRESS, /* ERR_INPROGRESS -5 Operation in progress */
+ EINVAL, /* ERR_VAL -6 Illegal value. */
+ EWOULDBLOCK, /* ERR_WOULDBLOCK -7 Operation would block. */
+ EADDRINUSE, /* ERR_USE -8 Address in use. */
+ EALREADY, /* ERR_ISCONN -9 Already connected. */
+ ECONNABORTED, /* ERR_ABRT -10 Connection aborted. */
+ ECONNRESET, /* ERR_RST -11 Connection reset. */
+ ENOTCONN, /* ERR_CLSD -12 Connection closed. */
+ ENOTCONN, /* ERR_CONN -13 Not connected. */
+ EIO, /* ERR_ARG -14 Illegal argument. */
+ -1, /* ERR_IF -15 Low-level netif error */
+};
+
+#define ERR_TO_ERRNO_TABLE_SIZE \
+ (sizeof(err_to_errno_table)/sizeof(err_to_errno_table[0]))
+
+#define err_to_errno(err) \
+ ((unsigned)(-(err)) < ERR_TO_ERRNO_TABLE_SIZE ? \
+ err_to_errno_table[-(err)] : EIO)
+
+#ifdef ERRNO
+#ifndef set_errno
+#define set_errno(err) errno = (err)
+#endif
+#else /* ERRNO */
+#define set_errno(err)
+#endif /* ERRNO */
+
+#define sock_set_errno(sk, e) do { \
+ sk->err = (e); \
+ set_errno(sk->err); \
+} while (0)
+
+/* Forward delcaration of some functions */
+static void event_callback(struct netconn *conn, enum netconn_evt evt, u16_t len);
+static void lwip_getsockopt_internal(void *arg);
+static void lwip_setsockopt_internal(void *arg);
+
+/**
+ * Initialize this module. This function has to be called before any other
+ * functions in this module!
+ */
+void
+lwip_socket_init(void)
+{
+}
+
+/**
+ * Map a externally used socket index to the internal socket representation.
+ *
+ * @param s externally used socket index
+ * @return struct lwip_sock for the socket or NULL if not found
+ */
+static struct lwip_sock *
+get_socket(int s)
+{
+ struct lwip_sock *sock;
+
+ if ((s < 0) || (s >= NUM_SOCKETS)) {
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("get_socket(%d): invalid\n", s));
+ set_errno(EBADF);
+ return NULL;
+ }
+
+ sock = &sockets[s];
+
+ if (!sock->conn) {
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("get_socket(%d): not active\n", s));
+ set_errno(EBADF);
+ return NULL;
+ }
+
+ return sock;
+}
+
+/**
+ * Same as get_socket but doesn't set errno
+ *
+ * @param s externally used socket index
+ * @return struct lwip_sock for the socket or NULL if not found
+ */
+static struct lwip_sock *
+tryget_socket(int s)
+{
+ if ((s < 0) || (s >= NUM_SOCKETS)) {
+ return NULL;
+ }
+ if (!sockets[s].conn) {
+ return NULL;
+ }
+ return &sockets[s];
+}
+
+/**
+ * Allocate a new socket for a given netconn.
+ *
+ * @param newconn the netconn for which to allocate a socket
+ * @param accepted 1 if socket has been created by accept(),
+ * 0 if socket has been created by socket()
+ * @return the index of the new socket; -1 on error
+ */
+static int
+alloc_socket(struct netconn *newconn, int accepted)
+{
+ int i;
+ SYS_ARCH_DECL_PROTECT(lev);
+
+ /* allocate a new socket identifier */
+ for (i = 0; i < NUM_SOCKETS; ++i) {
+ /* Protect socket array */
+ SYS_ARCH_PROTECT(lev);
+ if (!sockets[i].conn) {
+ sockets[i].conn = newconn;
+ /* The socket is not yet known to anyone, so no need to protect
+ after having marked it as used. */
+ SYS_ARCH_UNPROTECT(lev);
+ sockets[i].lastdata = NULL;
+ sockets[i].lastoffset = 0;
+ sockets[i].rcvevent = 0;
+ /* TCP sendbuf is empty, but the socket is not yet writable until connected
+ * (unless it has been created by accept()). */
+ sockets[i].sendevent = (NETCONNTYPE_GROUP(newconn->type) == NETCONN_TCP ? (accepted != 0) : 1);
+ sockets[i].errevent = 0;
+ sockets[i].err = 0;
+ sockets[i].select_waiting = 0;
+ return i;
+ }
+ SYS_ARCH_UNPROTECT(lev);
+ }
+ return -1;
+}
+
+/** Free a socket. The socket's netconn must have been
+ * delete before!
+ *
+ * @param sock the socket to free
+ * @param is_tcp != 0 for TCP sockets, used to free lastdata
+ */
+static void
+free_socket(struct lwip_sock *sock, int is_tcp)
+{
+ void *lastdata;
+ SYS_ARCH_DECL_PROTECT(lev);
+
+ lastdata = sock->lastdata;
+ sock->lastdata = NULL;
+ sock->lastoffset = 0;
+ sock->err = 0;
+
+ /* Protect socket array */
+ SYS_ARCH_PROTECT(lev);
+ sock->conn = NULL;
+ SYS_ARCH_UNPROTECT(lev);
+ /* don't use 'sock' after this line, as another task might have allocated it */
+
+ if (lastdata != NULL) {
+ if (is_tcp) {
+ pbuf_free((struct pbuf *)lastdata);
+ } else {
+ netbuf_delete((struct netbuf *)lastdata);
+ }
+ }
+}
+
+/* Below this, the well-known socket functions are implemented.
+ * Use google.com or opengroup.org to get a good description :-)
+ *
+ * Exceptions are documented!
+ */
+
+int
+lwip_accept(int s, struct sockaddr *addr, socklen_t *addrlen)
+{
+ struct lwip_sock *sock, *nsock;
+ struct netconn *newconn;
+ ipX_addr_t naddr;
+ u16_t port = 0;
+ int newsock;
+ err_t err;
+ SYS_ARCH_DECL_PROTECT(lev);
+
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d)...\n", s));
+ sock = get_socket(s);
+ if (!sock) {
+ return -1;
+ }
+
+ if (netconn_is_nonblocking(sock->conn) && (sock->rcvevent <= 0)) {
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d): returning EWOULDBLOCK\n", s));
+ sock_set_errno(sock, EWOULDBLOCK);
+ return -1;
+ }
+
+ /* wait for a new connection */
+ err = netconn_accept(sock->conn, &newconn);
+ if (err != ERR_OK) {
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d): netconn_acept failed, err=%d\n", s, err));
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) {
+ sock_set_errno(sock, EOPNOTSUPP);
+ return EOPNOTSUPP;
+ }
+ sock_set_errno(sock, err_to_errno(err));
+ return -1;
+ }
+ LWIP_ASSERT("newconn != NULL", newconn != NULL);
+ /* Prevent automatic window updates, we do this on our own! */
+ netconn_set_noautorecved(newconn, 1);
+
+ /* Note that POSIX only requires us to check addr is non-NULL. addrlen must
+ * not be NULL if addr is valid.
+ */
+ if (addr != NULL) {
+ union sockaddr_aligned tempaddr;
+ /* get the IP address and port of the remote host */
+ err = netconn_peer(newconn, ipX_2_ip(&naddr), &port);
+ if (err != ERR_OK) {
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d): netconn_peer failed, err=%d\n", s, err));
+ netconn_delete(newconn);
+ sock_set_errno(sock, err_to_errno(err));
+ return -1;
+ }
+ LWIP_ASSERT("addr valid but addrlen NULL", addrlen != NULL);
+
+ IPXADDR_PORT_TO_SOCKADDR(NETCONNTYPE_ISIPV6(newconn->type), &tempaddr, &naddr, port);
+ if (*addrlen > tempaddr.sa.sa_len) {
+ *addrlen = tempaddr.sa.sa_len;
+ }
+ MEMCPY(addr, &tempaddr, *addrlen);
+ }
+
+ newsock = alloc_socket(newconn, 1);
+ if (newsock == -1) {
+ netconn_delete(newconn);
+ sock_set_errno(sock, ENFILE);
+ return -1;
+ }
+ LWIP_ASSERT("invalid socket index", (newsock >= 0) && (newsock < NUM_SOCKETS));
+ LWIP_ASSERT("newconn->callback == event_callback", newconn->callback == event_callback);
+ nsock = &sockets[newsock];
+
+ /* See event_callback: If data comes in right away after an accept, even
+ * though the server task might not have created a new socket yet.
+ * In that case, newconn->socket is counted down (newconn->socket--),
+ * so nsock->rcvevent is >= 1 here!
+ */
+ SYS_ARCH_PROTECT(lev);
+ nsock->rcvevent += (s16_t)(-1 - newconn->socket);
+ newconn->socket = newsock;
+ SYS_ARCH_UNPROTECT(lev);
+
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d) returning new sock=%d", s, newsock));
+ if (addr != NULL) {
+ LWIP_DEBUGF(SOCKETS_DEBUG, (" addr="));
+ ipX_addr_debug_print(NETCONNTYPE_ISIPV6(newconn->type), SOCKETS_DEBUG, &naddr);
+ LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F"\n", port));
+ }
+
+ sock_set_errno(sock, 0);
+ return newsock;
+}
+
+int
+lwip_bind(int s, const struct sockaddr *name, socklen_t namelen)
+{
+ struct lwip_sock *sock;
+ ipX_addr_t local_addr;
+ u16_t local_port;
+ err_t err;
+
+ sock = get_socket(s);
+ if (!sock) {
+ return -1;
+ }
+
+ if (!SOCK_ADDR_TYPE_MATCH(name, sock)) {
+ /* sockaddr does not match socket type (IPv4/IPv6) */
+ sock_set_errno(sock, err_to_errno(ERR_VAL));
+ return -1;
+ }
+
+ /* check size, familiy and alignment of 'name' */
+ LWIP_ERROR("lwip_bind: invalid address", (IS_SOCK_ADDR_LEN_VALID(namelen) &&
+ IS_SOCK_ADDR_TYPE_VALID(name) && IS_SOCK_ADDR_ALIGNED(name)),
+ sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1;);
+ LWIP_UNUSED_ARG(namelen);
+
+ SOCKADDR_TO_IPXADDR_PORT((name->sa_family == AF_INET6), name, &local_addr, local_port);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d, addr=", s));
+ ipX_addr_debug_print(name->sa_family == AF_INET6, SOCKETS_DEBUG, &local_addr);
+ LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F")\n", local_port));
+
+ err = netconn_bind(sock->conn, ipX_2_ip(&local_addr), local_port);
+
+ if (err != ERR_OK) {
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d) failed, err=%d\n", s, err));
+ sock_set_errno(sock, err_to_errno(err));
+ return -1;
+ }
+
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d) succeeded\n", s));
+ sock_set_errno(sock, 0);
+ return 0;
+}
+
+int
+lwip_close(int s)
+{
+ struct lwip_sock *sock;
+ int is_tcp = 0;
+
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_close(%d)\n", s));
+
+ sock = get_socket(s);
+ if (!sock) {
+ return -1;
+ }
+
+ if(sock->conn != NULL) {
+ is_tcp = NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP;
+ } else {
+ LWIP_ASSERT("sock->lastdata == NULL", sock->lastdata == NULL);
+ }
+
+ netconn_delete(sock->conn);
+
+ free_socket(sock, is_tcp);
+ set_errno(0);
+ return 0;
+}
+
+int
+lwip_connect(int s, const struct sockaddr *name, socklen_t namelen)
+{
+ struct lwip_sock *sock;
+ err_t err;
+
+ sock = get_socket(s);
+ if (!sock) {
+ return -1;
+ }
+
+ if (!SOCK_ADDR_TYPE_MATCH_OR_UNSPEC(name, sock)) {
+ /* sockaddr does not match socket type (IPv4/IPv6) */
+ sock_set_errno(sock, err_to_errno(ERR_VAL));
+ return -1;
+ }
+
+ /* check size, familiy and alignment of 'name' */
+ LWIP_ERROR("lwip_connect: invalid address", IS_SOCK_ADDR_LEN_VALID(namelen) &&
+ IS_SOCK_ADDR_TYPE_VALID_OR_UNSPEC(name) && IS_SOCK_ADDR_ALIGNED(name),
+ sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1;);
+ LWIP_UNUSED_ARG(namelen);
+ if (name->sa_family == AF_UNSPEC) {
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d, AF_UNSPEC)\n", s));
+ err = netconn_disconnect(sock->conn);
+ } else {
+ ipX_addr_t remote_addr;
+ u16_t remote_port;
+ SOCKADDR_TO_IPXADDR_PORT((name->sa_family == AF_INET6), name, &remote_addr, remote_port);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d, addr=", s));
+ ipX_addr_debug_print(name->sa_family == AF_INET6, SOCKETS_DEBUG, &remote_addr);
+ LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F")\n", remote_port));
+
+ err = netconn_connect(sock->conn, ipX_2_ip(&remote_addr), remote_port);
+ }
+
+ if (err != ERR_OK) {
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d) failed, err=%d\n", s, err));
+ sock_set_errno(sock, err_to_errno(err));
+ return -1;
+ }
+
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d) succeeded\n", s));
+ sock_set_errno(sock, 0);
+ return 0;
+}
+
+/**
+ * Set a socket into listen mode.
+ * The socket may not have been used for another connection previously.
+ *
+ * @param s the socket to set to listening mode
+ * @param backlog (ATTENTION: needs TCP_LISTEN_BACKLOG=1)
+ * @return 0 on success, non-zero on failure
+ */
+int
+lwip_listen(int s, int backlog)
+{
+ struct lwip_sock *sock;
+ err_t err;
+
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_listen(%d, backlog=%d)\n", s, backlog));
+
+ sock = get_socket(s);
+ if (!sock) {
+ return -1;
+ }
+
+ /* limit the "backlog" parameter to fit in an u8_t */
+ backlog = LWIP_MIN(LWIP_MAX(backlog, 0), 0xff);
+
+ err = netconn_listen_with_backlog(sock->conn, (u8_t)backlog);
+
+ if (err != ERR_OK) {
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_listen(%d) failed, err=%d\n", s, err));
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) {
+ sock_set_errno(sock, EOPNOTSUPP);
+ return EOPNOTSUPP;
+ }
+ sock_set_errno(sock, err_to_errno(err));
+ return -1;
+ }
+
+ sock_set_errno(sock, 0);
+ return 0;
+}
+
+int
+lwip_recvfrom(int s, void *mem, size_t len, int flags,
+ struct sockaddr *from, socklen_t *fromlen)
+{
+ struct lwip_sock *sock;
+ void *buf = NULL;
+ struct pbuf *p;
+ u16_t buflen, copylen;
+ int off = 0;
+ u8_t done = 0;
+ err_t err;
+
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d, %p, %"SZT_F", 0x%x, ..)\n", s, mem, len, flags));
+ sock = get_socket(s);
+ if (!sock) {
+ return -1;
+ }
+
+ do {
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: top while sock->lastdata=%p\n", sock->lastdata));
+ /* Check if there is data left from the last recv operation. */
+ if (sock->lastdata) {
+ buf = sock->lastdata;
+ } else {
+ /* If this is non-blocking call, then check first */
+ if (((flags & MSG_DONTWAIT) || netconn_is_nonblocking(sock->conn)) &&
+ (sock->rcvevent <= 0)) {
+ if (off > 0) {
+ /* update receive window */
+ netconn_recved(sock->conn, (u32_t)off);
+ /* already received data, return that */
+ sock_set_errno(sock, 0);
+ return off;
+ }
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): returning EWOULDBLOCK\n", s));
+ sock_set_errno(sock, EWOULDBLOCK);
+ return -1;
+ }
+
+ /* No data was left from the previous operation, so we try to get
+ some from the network. */
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) {
+ err = netconn_recv_tcp_pbuf(sock->conn, (struct pbuf **)&buf);
+ } else {
+ err = netconn_recv(sock->conn, (struct netbuf **)&buf);
+ }
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: netconn_recv err=%d, netbuf=%p\n",
+ err, buf));
+
+ if (err != ERR_OK) {
+ if (off > 0) {
+ /* update receive window */
+ netconn_recved(sock->conn, (u32_t)off);
+ /* already received data, return that */
+ sock_set_errno(sock, 0);
+ return off;
+ }
+ /* We should really do some error checking here. */
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): buf == NULL, error is \"%s\"!\n",
+ s, lwip_strerr(err)));
+ sock_set_errno(sock, err_to_errno(err));
+ if (err == ERR_CLSD) {
+ return 0;
+ } else {
+ return -1;
+ }
+ }
+ LWIP_ASSERT("buf != NULL", buf != NULL);
+ sock->lastdata = buf;
+ }
+
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) {
+ p = (struct pbuf *)buf;
+ } else {
+ p = ((struct netbuf *)buf)->p;
+ }
+ buflen = p->tot_len;
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: buflen=%"U16_F" len=%"SZT_F" off=%d sock->lastoffset=%"U16_F"\n",
+ buflen, len, off, sock->lastoffset));
+
+ buflen -= sock->lastoffset;
+
+ if (len > buflen) {
+ copylen = buflen;
+ } else {
+ copylen = (u16_t)len;
+ }
+
+ /* copy the contents of the received buffer into
+ the supplied memory pointer mem */
+ pbuf_copy_partial(p, (u8_t*)mem + off, copylen, sock->lastoffset);
+
+ off += copylen;
+
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) {
+ LWIP_ASSERT("invalid copylen, len would underflow", len >= copylen);
+ len -= copylen;
+ if ( (len <= 0) ||
+ (p->flags & PBUF_FLAG_PUSH) ||
+ (sock->rcvevent <= 0) ||
+ ((flags & MSG_PEEK)!=0)) {
+ done = 1;
+ }
+ } else {
+ done = 1;
+ }
+
+ /* Check to see from where the data was.*/
+ if (done) {
+#if !SOCKETS_DEBUG
+ if (from && fromlen)
+#endif /* !SOCKETS_DEBUG */
+ {
+ u16_t port;
+ ipX_addr_t tmpaddr;
+ ipX_addr_t *fromaddr;
+ union sockaddr_aligned saddr;
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): addr=", s));
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) {
+ fromaddr = &tmpaddr;
+ /* @todo: this does not work for IPv6, yet */
+ netconn_getaddr(sock->conn, ipX_2_ip(fromaddr), &port, 0);
+ } else {
+ port = netbuf_fromport((struct netbuf *)buf);
+ fromaddr = netbuf_fromaddr_ipX((struct netbuf *)buf);
+ }
+ IPXADDR_PORT_TO_SOCKADDR(NETCONNTYPE_ISIPV6(netconn_type(sock->conn)),
+ &saddr, fromaddr, port);
+ ipX_addr_debug_print(NETCONNTYPE_ISIPV6(netconn_type(sock->conn)),
+ SOCKETS_DEBUG, fromaddr);
+ LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F" len=%d\n", port, off));
+#if SOCKETS_DEBUG
+ if (from && fromlen)
+#endif /* SOCKETS_DEBUG */
+ {
+ if (*fromlen > saddr.sa.sa_len) {
+ *fromlen = saddr.sa.sa_len;
+ }
+ MEMCPY(from, &saddr, *fromlen);
+ }
+ }
+ }
+
+ /* If we don't peek the incoming message... */
+ if ((flags & MSG_PEEK) == 0) {
+ /* If this is a TCP socket, check if there is data left in the
+ buffer. If so, it should be saved in the sock structure for next
+ time around. */
+ if ((NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) && (buflen - copylen > 0)) {
+ sock->lastdata = buf;
+ sock->lastoffset += copylen;
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: lastdata now netbuf=%p\n", buf));
+ } else {
+ sock->lastdata = NULL;
+ sock->lastoffset = 0;
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: deleting netbuf=%p\n", buf));
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) {
+ pbuf_free((struct pbuf *)buf);
+ } else {
+ netbuf_delete((struct netbuf *)buf);
+ }
+ }
+ }
+ } while (!done);
+
+ if ((off > 0) && (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP)) {
+ /* update receive window */
+ netconn_recved(sock->conn, (u32_t)off);
+ }
+ sock_set_errno(sock, 0);
+ return off;
+}
+
+int
+lwip_read(int s, void *mem, size_t len)
+{
+ return lwip_recvfrom(s, mem, len, 0, NULL, NULL);
+}
+
+int
+lwip_recv(int s, void *mem, size_t len, int flags)
+{
+ return lwip_recvfrom(s, mem, len, flags, NULL, NULL);
+}
+
+int
+lwip_send(int s, const void *data, size_t size, int flags)
+{
+ struct lwip_sock *sock;
+ err_t err;
+ u8_t write_flags;
+ size_t written;
+
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d, data=%p, size=%"SZT_F", flags=0x%x)\n",
+ s, data, size, flags));
+
+ sock = get_socket(s);
+ if (!sock) {
+ return -1;
+ }
+
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) {
+#if (LWIP_UDP || LWIP_RAW)
+ return lwip_sendto(s, data, size, flags, NULL, 0);
+#else /* (LWIP_UDP || LWIP_RAW) */
+ sock_set_errno(sock, err_to_errno(ERR_ARG));
+ return -1;
+#endif /* (LWIP_UDP || LWIP_RAW) */
+ }
+
+ write_flags = NETCONN_COPY |
+ ((flags & MSG_MORE) ? NETCONN_MORE : 0) |
+ ((flags & MSG_DONTWAIT) ? NETCONN_DONTBLOCK : 0);
+ written = 0;
+ err = netconn_write_partly(sock->conn, data, size, write_flags, &written);
+
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d) err=%d written=%"SZT_F"\n", s, err, written));
+ sock_set_errno(sock, err_to_errno(err));
+ return (err == ERR_OK ? (int)written : -1);
+}
+
+int
+lwip_sendto(int s, const void *data, size_t size, int flags,
+ const struct sockaddr *to, socklen_t tolen)
+{
+ struct lwip_sock *sock;
+ err_t err;
+ u16_t short_size;
+ u16_t remote_port;
+#if !LWIP_TCPIP_CORE_LOCKING
+ struct netbuf buf;
+#endif
+
+ sock = get_socket(s);
+ if (!sock) {
+ return -1;
+ }
+
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) {
+#if LWIP_TCP
+ return lwip_send(s, data, size, flags);
+#else /* LWIP_TCP */
+ LWIP_UNUSED_ARG(flags);
+ sock_set_errno(sock, err_to_errno(ERR_ARG));
+ return -1;
+#endif /* LWIP_TCP */
+ }
+
+ if ((to != NULL) && !SOCK_ADDR_TYPE_MATCH(to, sock)) {
+ /* sockaddr does not match socket type (IPv4/IPv6) */
+ sock_set_errno(sock, err_to_errno(ERR_VAL));
+ return -1;
+ }
+
+ /* @todo: split into multiple sendto's? */
+ LWIP_ASSERT("lwip_sendto: size must fit in u16_t", size <= 0xffff);
+ short_size = (u16_t)size;
+ LWIP_ERROR("lwip_sendto: invalid address", (((to == NULL) && (tolen == 0)) ||
+ (IS_SOCK_ADDR_LEN_VALID(tolen) &&
+ IS_SOCK_ADDR_TYPE_VALID(to) && IS_SOCK_ADDR_ALIGNED(to))),
+ sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1;);
+ LWIP_UNUSED_ARG(tolen);
+
+#if LWIP_TCPIP_CORE_LOCKING
+ /* Special speedup for fast UDP/RAW sending: call the raw API directly
+ instead of using the netconn functions. */
+ {
+ struct pbuf* p;
+ ipX_addr_t *remote_addr;
+ ipX_addr_t remote_addr_tmp;
+
+#if LWIP_NETIF_TX_SINGLE_PBUF
+ p = pbuf_alloc(PBUF_TRANSPORT, short_size, PBUF_RAM);
+ if (p != NULL) {
+#if LWIP_CHECKSUM_ON_COPY
+ u16_t chksum = 0;
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_RAW) {
+ chksum = LWIP_CHKSUM_COPY(p->payload, data, short_size);
+ } else
+#endif /* LWIP_CHECKSUM_ON_COPY */
+ MEMCPY(p->payload, data, size);
+#else /* LWIP_NETIF_TX_SINGLE_PBUF */
+ p = pbuf_alloc(PBUF_TRANSPORT, short_size, PBUF_REF);
+ if (p != NULL) {
+ p->payload = (void*)data;
+#endif /* LWIP_NETIF_TX_SINGLE_PBUF */
+
+ if (to != NULL) {
+ SOCKADDR_TO_IPXADDR_PORT(to->sa_family == AF_INET6,
+ to, &remote_addr_tmp, remote_port);
+ remote_addr = &remote_addr_tmp;
+ } else {
+ remote_addr = &sock->conn->pcb.ip->remote_ip;
+#if LWIP_UDP
+ if (NETCONNTYPE_GROUP(sock->conn->type) == NETCONN_UDP) {
+ remote_port = sock->conn->pcb.udp->remote_port;
+ } else
+#endif /* LWIP_UDP */
+ {
+ remote_port = 0;
+ }
+ }
+
+ LOCK_TCPIP_CORE();
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_RAW) {
+#if LWIP_RAW
+ err = sock->conn->last_err = raw_sendto(sock->conn->pcb.raw, p, ipX_2_ip(remote_addr));
+#else /* LWIP_RAW */
+ err = ERR_ARG;
+#endif /* LWIP_RAW */
+ }
+#if LWIP_UDP && LWIP_RAW
+ else
+#endif /* LWIP_UDP && LWIP_RAW */
+ {
+#if LWIP_UDP
+#if LWIP_CHECKSUM_ON_COPY && LWIP_NETIF_TX_SINGLE_PBUF
+ err = sock->conn->last_err = udp_sendto_chksum(sock->conn->pcb.udp, p,
+ ipX_2_ip(remote_addr), remote_port, 1, chksum);
+#else /* LWIP_CHECKSUM_ON_COPY && LWIP_NETIF_TX_SINGLE_PBUF */
+ err = sock->conn->last_err = udp_sendto(sock->conn->pcb.udp, p,
+ ipX_2_ip(remote_addr), remote_port);
+#endif /* LWIP_CHECKSUM_ON_COPY && LWIP_NETIF_TX_SINGLE_PBUF */
+#else /* LWIP_UDP */
+ err = ERR_ARG;
+#endif /* LWIP_UDP */
+ }
+ UNLOCK_TCPIP_CORE();
+
+ pbuf_free(p);
+ } else {
+ err = ERR_MEM;
+ }
+ }
+#else /* LWIP_TCPIP_CORE_LOCKING */
+ /* initialize a buffer */
+ buf.p = buf.ptr = NULL;
+#if LWIP_CHECKSUM_ON_COPY
+ buf.flags = 0;
+#endif /* LWIP_CHECKSUM_ON_COPY */
+ if (to) {
+ SOCKADDR_TO_IPXADDR_PORT((to->sa_family) == AF_INET6, to, &buf.addr, remote_port);
+ } else {
+ remote_port = 0;
+ ipX_addr_set_any(NETCONNTYPE_ISIPV6(netconn_type(sock->conn)), &buf.addr);
+ }
+ netbuf_fromport(&buf) = remote_port;
+
+
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_sendto(%d, data=%p, short_size=%"U16_F", flags=0x%x to=",
+ s, data, short_size, flags));
+ ipX_addr_debug_print(NETCONNTYPE_ISIPV6(netconn_type(sock->conn)),
+ SOCKETS_DEBUG, &buf.addr);
+ LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F"\n", remote_port));
+
+ /* make the buffer point to the data that should be sent */
+#if LWIP_NETIF_TX_SINGLE_PBUF
+ /* Allocate a new netbuf and copy the data into it. */
+ if (netbuf_alloc(&buf, short_size) == NULL) {
+ err = ERR_MEM;
+ } else {
+#if LWIP_CHECKSUM_ON_COPY
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_RAW) {
+ u16_t chksum = LWIP_CHKSUM_COPY(buf.p->payload, data, short_size);
+ netbuf_set_chksum(&buf, chksum);
+ err = ERR_OK;
+ } else
+#endif /* LWIP_CHECKSUM_ON_COPY */
+ {
+ err = netbuf_take(&buf, data, short_size);
+ }
+ }
+#else /* LWIP_NETIF_TX_SINGLE_PBUF */
+ err = netbuf_ref(&buf, data, short_size);
+#endif /* LWIP_NETIF_TX_SINGLE_PBUF */
+ if (err == ERR_OK) {
+ /* send the data */
+ err = netconn_send(sock->conn, &buf);
+ }
+
+ /* deallocated the buffer */
+ netbuf_free(&buf);
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+ sock_set_errno(sock, err_to_errno(err));
+ return (err == ERR_OK ? short_size : -1);
+}
+
+int
+lwip_socket(int domain, int type, int protocol)
+{
+ struct netconn *conn;
+ int i;
+
+#if !LWIP_IPV6
+ LWIP_UNUSED_ARG(domain); /* @todo: check this */
+#endif /* LWIP_IPV6 */
+
+ /* create a netconn */
+ switch (type) {
+ case SOCK_RAW:
+ conn = netconn_new_with_proto_and_callback(DOMAIN_TO_NETCONN_TYPE(domain, NETCONN_RAW),
+ (u8_t)protocol, event_callback);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_RAW, %d) = ",
+ domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol));
+ break;
+ case SOCK_DGRAM:
+ conn = netconn_new_with_callback(DOMAIN_TO_NETCONN_TYPE(domain,
+ ((protocol == IPPROTO_UDPLITE) ? NETCONN_UDPLITE : NETCONN_UDP)) ,
+ event_callback);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_DGRAM, %d) = ",
+ domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol));
+ break;
+ case SOCK_STREAM:
+ conn = netconn_new_with_callback(DOMAIN_TO_NETCONN_TYPE(domain, NETCONN_TCP), event_callback);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_STREAM, %d) = ",
+ domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol));
+ if (conn != NULL) {
+ /* Prevent automatic window updates, we do this on our own! */
+ netconn_set_noautorecved(conn, 1);
+ }
+ break;
+ default:
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%d, %d/UNKNOWN, %d) = -1\n",
+ domain, type, protocol));
+ set_errno(EINVAL);
+ return -1;
+ }
+
+ if (!conn) {
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("-1 / ENOBUFS (could not create netconn)\n"));
+ set_errno(ENOBUFS);
+ return -1;
+ }
+
+ i = alloc_socket(conn, 0);
+
+ if (i == -1) {
+ netconn_delete(conn);
+ set_errno(ENFILE);
+ return -1;
+ }
+ conn->socket = i;
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("%d\n", i));
+ set_errno(0);
+ return i;
+}
+
+int
+lwip_write(int s, const void *data, size_t size)
+{
+ return lwip_send(s, data, size, 0);
+}
+
+/**
+ * Go through the readset and writeset lists and see which socket of the sockets
+ * set in the sets has events. On return, readset, writeset and exceptset have
+ * the sockets enabled that had events.
+ *
+ * exceptset is not used for now!!!
+ *
+ * @param maxfdp1 the highest socket index in the sets
+ * @param readset_in: set of sockets to check for read events
+ * @param writeset_in: set of sockets to check for write events
+ * @param exceptset_in: set of sockets to check for error events
+ * @param readset_out: set of sockets that had read events
+ * @param writeset_out: set of sockets that had write events
+ * @param exceptset_out: set os sockets that had error events
+ * @return number of sockets that had events (read/write/exception) (>= 0)
+ */
+static int
+lwip_selscan(int maxfdp1, fd_set *readset_in, fd_set *writeset_in, fd_set *exceptset_in,
+ fd_set *readset_out, fd_set *writeset_out, fd_set *exceptset_out)
+{
+ int i, nready = 0;
+ fd_set lreadset, lwriteset, lexceptset;
+ struct lwip_sock *sock;
+ SYS_ARCH_DECL_PROTECT(lev);
+
+ FD_ZERO(&lreadset);
+ FD_ZERO(&lwriteset);
+ FD_ZERO(&lexceptset);
+
+ /* Go through each socket in each list to count number of sockets which
+ currently match */
+ for(i = 0; i < maxfdp1; i++) {
+ void* lastdata = NULL;
+ s16_t rcvevent = 0;
+ u16_t sendevent = 0;
+ u16_t errevent = 0;
+ /* First get the socket's status (protected)... */
+ SYS_ARCH_PROTECT(lev);
+ sock = tryget_socket(i);
+ if (sock != NULL) {
+ lastdata = sock->lastdata;
+ rcvevent = sock->rcvevent;
+ sendevent = sock->sendevent;
+ errevent = sock->errevent;
+ }
+ SYS_ARCH_UNPROTECT(lev);
+ /* ... then examine it: */
+ /* See if netconn of this socket is ready for read */
+ if (readset_in && FD_ISSET(i, readset_in) && ((lastdata != NULL) || (rcvevent > 0))) {
+ FD_SET(i, &lreadset);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for reading\n", i));
+ nready++;
+ }
+ /* See if netconn of this socket is ready for write */
+ if (writeset_in && FD_ISSET(i, writeset_in) && (sendevent != 0)) {
+ FD_SET(i, &lwriteset);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for writing\n", i));
+ nready++;
+ }
+ /* See if netconn of this socket had an error */
+ if (exceptset_in && FD_ISSET(i, exceptset_in) && (errevent != 0)) {
+ FD_SET(i, &lexceptset);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for exception\n", i));
+ nready++;
+ }
+ }
+ /* copy local sets to the ones provided as arguments */
+ *readset_out = lreadset;
+ *writeset_out = lwriteset;
+ *exceptset_out = lexceptset;
+
+ LWIP_ASSERT("nready >= 0", nready >= 0);
+ return nready;
+}
+
+/**
+ * Processing exceptset is not yet implemented.
+ */
+int
+lwip_select(int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset,
+ struct timeval *timeout)
+{
+ u32_t waitres = 0;
+ int nready;
+ fd_set lreadset, lwriteset, lexceptset;
+ u32_t msectimeout;
+ struct lwip_select_cb select_cb;
+ err_t err;
+ int i;
+ SYS_ARCH_DECL_PROTECT(lev);
+
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select(%d, %p, %p, %p, tvsec=%"S32_F" tvusec=%"S32_F")\n",
+ maxfdp1, (void *)readset, (void *) writeset, (void *) exceptset,
+ timeout ? (s32_t)timeout->tv_sec : (s32_t)-1,
+ timeout ? (s32_t)timeout->tv_usec : (s32_t)-1));
+
+ /* Go through each socket in each list to count number of sockets which
+ currently match */
+ nready = lwip_selscan(maxfdp1, readset, writeset, exceptset, &lreadset, &lwriteset, &lexceptset);
+
+ /* If we don't have any current events, then suspend if we are supposed to */
+ if (!nready) {
+ if (timeout && timeout->tv_sec == 0 && timeout->tv_usec == 0) {
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: no timeout, returning 0\n"));
+ /* This is OK as the local fdsets are empty and nready is zero,
+ or we would have returned earlier. */
+ goto return_copy_fdsets;
+ }
+
+ /* None ready: add our semaphore to list:
+ We don't actually need any dynamic memory. Our entry on the
+ list is only valid while we are in this function, so it's ok
+ to use local variables. */
+
+ select_cb.next = NULL;
+ select_cb.prev = NULL;
+ select_cb.readset = readset;
+ select_cb.writeset = writeset;
+ select_cb.exceptset = exceptset;
+ select_cb.sem_signalled = 0;
+ err = sys_sem_new(&select_cb.sem, 0);
+ if (err != ERR_OK) {
+ /* failed to create semaphore */
+ set_errno(ENOMEM);
+ return -1;
+ }
+
+ /* Protect the select_cb_list */
+ SYS_ARCH_PROTECT(lev);
+
+ /* Put this select_cb on top of list */
+ select_cb.next = select_cb_list;
+ if (select_cb_list != NULL) {
+ select_cb_list->prev = &select_cb;
+ }
+ select_cb_list = &select_cb;
+ /* Increasing this counter tells even_callback that the list has changed. */
+ select_cb_ctr++;
+
+ /* Now we can safely unprotect */
+ SYS_ARCH_UNPROTECT(lev);
+
+ /* Increase select_waiting for each socket we are interested in */
+ for(i = 0; i < maxfdp1; i++) {
+ if ((readset && FD_ISSET(i, readset)) ||
+ (writeset && FD_ISSET(i, writeset)) ||
+ (exceptset && FD_ISSET(i, exceptset))) {
+ struct lwip_sock *sock = tryget_socket(i);
+ LWIP_ASSERT("sock != NULL", sock != NULL);
+ SYS_ARCH_PROTECT(lev);
+ sock->select_waiting++;
+ LWIP_ASSERT("sock->select_waiting > 0", sock->select_waiting > 0);
+ SYS_ARCH_UNPROTECT(lev);
+ }
+ }
+
+ /* Call lwip_selscan again: there could have been events between
+ the last scan (whithout us on the list) and putting us on the list! */
+ nready = lwip_selscan(maxfdp1, readset, writeset, exceptset, &lreadset, &lwriteset, &lexceptset);
+ if (!nready) {
+ /* Still none ready, just wait to be woken */
+ if (timeout == 0) {
+ /* Wait forever */
+ msectimeout = 0;
+ } else {
+ msectimeout = ((timeout->tv_sec * 1000) + ((timeout->tv_usec + 500)/1000));
+ if (msectimeout == 0) {
+ /* Wait 1ms at least (0 means wait forever) */
+ msectimeout = 1;
+ }
+ }
+
+ waitres = sys_arch_sem_wait(&select_cb.sem, msectimeout);
+ }
+ /* Increase select_waiting for each socket we are interested in */
+ for(i = 0; i < maxfdp1; i++) {
+ if ((readset && FD_ISSET(i, readset)) ||
+ (writeset && FD_ISSET(i, writeset)) ||
+ (exceptset && FD_ISSET(i, exceptset))) {
+ struct lwip_sock *sock = tryget_socket(i);
+ LWIP_ASSERT("sock != NULL", sock != NULL);
+ SYS_ARCH_PROTECT(lev);
+ sock->select_waiting--;
+ LWIP_ASSERT("sock->select_waiting >= 0", sock->select_waiting >= 0);
+ SYS_ARCH_UNPROTECT(lev);
+ }
+ }
+ /* Take us off the list */
+ SYS_ARCH_PROTECT(lev);
+ if (select_cb.next != NULL) {
+ select_cb.next->prev = select_cb.prev;
+ }
+ if (select_cb_list == &select_cb) {
+ LWIP_ASSERT("select_cb.prev == NULL", select_cb.prev == NULL);
+ select_cb_list = select_cb.next;
+ } else {
+ LWIP_ASSERT("select_cb.prev != NULL", select_cb.prev != NULL);
+ select_cb.prev->next = select_cb.next;
+ }
+ /* Increasing this counter tells even_callback that the list has changed. */
+ select_cb_ctr++;
+ SYS_ARCH_UNPROTECT(lev);
+
+ sys_sem_free(&select_cb.sem);
+ if (waitres == SYS_ARCH_TIMEOUT) {
+ /* Timeout */
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: timeout expired\n"));
+ /* This is OK as the local fdsets are empty and nready is zero,
+ or we would have returned earlier. */
+ goto return_copy_fdsets;
+ }
+
+ /* See what's set */
+ nready = lwip_selscan(maxfdp1, readset, writeset, exceptset, &lreadset, &lwriteset, &lexceptset);
+ }
+
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: nready=%d\n", nready));
+return_copy_fdsets:
+ set_errno(0);
+ if (readset) {
+ *readset = lreadset;
+ }
+ if (writeset) {
+ *writeset = lwriteset;
+ }
+ if (exceptset) {
+ *exceptset = lexceptset;
+ }
+ return nready;
+}
+
+/**
+ * Callback registered in the netconn layer for each socket-netconn.
+ * Processes recvevent (data available) and wakes up tasks waiting for select.
+ */
+static void
+event_callback(struct netconn *conn, enum netconn_evt evt, u16_t len)
+{
+ int s;
+ struct lwip_sock *sock;
+ struct lwip_select_cb *scb;
+ int last_select_cb_ctr;
+ SYS_ARCH_DECL_PROTECT(lev);
+
+ LWIP_UNUSED_ARG(len);
+
+ /* Get socket */
+ if (conn) {
+ s = conn->socket;
+ if (s < 0) {
+ /* Data comes in right away after an accept, even though
+ * the server task might not have created a new socket yet.
+ * Just count down (or up) if that's the case and we
+ * will use the data later. Note that only receive events
+ * can happen before the new socket is set up. */
+ SYS_ARCH_PROTECT(lev);
+ if (conn->socket < 0) {
+ if (evt == NETCONN_EVT_RCVPLUS) {
+ conn->socket--;
+ }
+ SYS_ARCH_UNPROTECT(lev);
+ return;
+ }
+ s = conn->socket;
+ SYS_ARCH_UNPROTECT(lev);
+ }
+
+ sock = get_socket(s);
+ if (!sock) {
+ return;
+ }
+ } else {
+ return;
+ }
+
+ SYS_ARCH_PROTECT(lev);
+ /* Set event as required */
+ switch (evt) {
+ case NETCONN_EVT_RCVPLUS:
+ sock->rcvevent++;
+ break;
+ case NETCONN_EVT_RCVMINUS:
+ sock->rcvevent--;
+ break;
+ case NETCONN_EVT_SENDPLUS:
+ sock->sendevent = 1;
+ break;
+ case NETCONN_EVT_SENDMINUS:
+ sock->sendevent = 0;
+ break;
+ case NETCONN_EVT_ERROR:
+ sock->errevent = 1;
+ break;
+ default:
+ LWIP_ASSERT("unknown event", 0);
+ break;
+ }
+
+ if (sock->select_waiting == 0) {
+ /* noone is waiting for this socket, no need to check select_cb_list */
+ SYS_ARCH_UNPROTECT(lev);
+ return;
+ }
+
+ /* Now decide if anyone is waiting for this socket */
+ /* NOTE: This code goes through the select_cb_list list multiple times
+ ONLY IF a select was actually waiting. We go through the list the number
+ of waiting select calls + 1. This list is expected to be small. */
+
+ /* At this point, SYS_ARCH is still protected! */
+again:
+ for (scb = select_cb_list; scb != NULL; scb = scb->next) {
+ if (scb->sem_signalled == 0) {
+ /* semaphore not signalled yet */
+ int do_signal = 0;
+ /* Test this select call for our socket */
+ if (sock->rcvevent > 0) {
+ if (scb->readset && FD_ISSET(s, scb->readset)) {
+ do_signal = 1;
+ }
+ }
+ if (sock->sendevent != 0) {
+ if (!do_signal && scb->writeset && FD_ISSET(s, scb->writeset)) {
+ do_signal = 1;
+ }
+ }
+ if (sock->errevent != 0) {
+ if (!do_signal && scb->exceptset && FD_ISSET(s, scb->exceptset)) {
+ do_signal = 1;
+ }
+ }
+ if (do_signal) {
+ scb->sem_signalled = 1;
+ /* Don't call SYS_ARCH_UNPROTECT() before signaling the semaphore, as this might
+ lead to the select thread taking itself off the list, invalidagin the semaphore. */
+ sys_sem_signal(&scb->sem);
+ }
+ }
+ /* unlock interrupts with each step */
+ last_select_cb_ctr = select_cb_ctr;
+ SYS_ARCH_UNPROTECT(lev);
+ /* this makes sure interrupt protection time is short */
+ SYS_ARCH_PROTECT(lev);
+ if (last_select_cb_ctr != select_cb_ctr) {
+ /* someone has changed select_cb_list, restart at the beginning */
+ goto again;
+ }
+ }
+ SYS_ARCH_UNPROTECT(lev);
+}
+
+/**
+ * Unimplemented: Close one end of a full-duplex connection.
+ * Currently, the full connection is closed.
+ */
+int
+lwip_shutdown(int s, int how)
+{
+ struct lwip_sock *sock;
+ err_t err;
+ u8_t shut_rx = 0, shut_tx = 0;
+
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_shutdown(%d, how=%d)\n", s, how));
+
+ sock = get_socket(s);
+ if (!sock) {
+ return -1;
+ }
+
+ if (sock->conn != NULL) {
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) {
+ sock_set_errno(sock, EOPNOTSUPP);
+ return EOPNOTSUPP;
+ }
+ } else {
+ sock_set_errno(sock, ENOTCONN);
+ return ENOTCONN;
+ }
+
+ if (how == SHUT_RD) {
+ shut_rx = 1;
+ } else if (how == SHUT_WR) {
+ shut_tx = 1;
+ } else if(how == SHUT_RDWR) {
+ shut_rx = 1;
+ shut_tx = 1;
+ } else {
+ sock_set_errno(sock, EINVAL);
+ return EINVAL;
+ }
+ err = netconn_shutdown(sock->conn, shut_rx, shut_tx);
+
+ sock_set_errno(sock, err_to_errno(err));
+ return (err == ERR_OK ? 0 : -1);
+}
+
+static int
+lwip_getaddrname(int s, struct sockaddr *name, socklen_t *namelen, u8_t local)
+{
+ struct lwip_sock *sock;
+ union sockaddr_aligned saddr;
+ ipX_addr_t naddr;
+ u16_t port;
+
+ sock = get_socket(s);
+ if (!sock) {
+ return -1;
+ }
+
+ /* get the IP address and port */
+ /* @todo: this does not work for IPv6, yet */
+ netconn_getaddr(sock->conn, ipX_2_ip(&naddr), &port, local);
+ IPXADDR_PORT_TO_SOCKADDR(NETCONNTYPE_ISIPV6(netconn_type(sock->conn)),
+ &saddr, &naddr, port);
+
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getaddrname(%d, addr=", s));
+ ipX_addr_debug_print(NETCONNTYPE_ISIPV6(netconn_type(sock->conn)),
+ SOCKETS_DEBUG, &naddr);
+ LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F")\n", port));
+
+ if (*namelen > saddr.sa.sa_len) {
+ *namelen = saddr.sa.sa_len;
+ }
+ MEMCPY(name, &saddr, *namelen);
+
+ sock_set_errno(sock, 0);
+ return 0;
+}
+
+int
+lwip_getpeername(int s, struct sockaddr *name, socklen_t *namelen)
+{
+ return lwip_getaddrname(s, name, namelen, 0);
+}
+
+int
+lwip_getsockname(int s, struct sockaddr *name, socklen_t *namelen)
+{
+ return lwip_getaddrname(s, name, namelen, 1);
+}
+
+int
+lwip_getsockopt(int s, int level, int optname, void *optval, socklen_t *optlen)
+{
+ err_t err = ERR_OK;
+ struct lwip_sock *sock = get_socket(s);
+ struct lwip_setgetsockopt_data data;
+
+ if (!sock) {
+ return -1;
+ }
+
+ if ((NULL == optval) || (NULL == optlen)) {
+ sock_set_errno(sock, EFAULT);
+ return -1;
+ }
+
+ /* Do length and type checks for the various options first, to keep it readable. */
+ switch (level) {
+
+/* Level: SOL_SOCKET */
+ case SOL_SOCKET:
+ switch (optname) {
+
+ case SO_ACCEPTCONN:
+ case SO_BROADCAST:
+ /* UNIMPL case SO_DEBUG: */
+ /* UNIMPL case SO_DONTROUTE: */
+ case SO_ERROR:
+ case SO_KEEPALIVE:
+ /* UNIMPL case SO_CONTIMEO: */
+#if LWIP_SO_SNDTIMEO
+ case SO_SNDTIMEO:
+#endif /* LWIP_SO_SNDTIMEO */
+#if LWIP_SO_RCVTIMEO
+ case SO_RCVTIMEO:
+#endif /* LWIP_SO_RCVTIMEO */
+#if LWIP_SO_RCVBUF
+ case SO_RCVBUF:
+#endif /* LWIP_SO_RCVBUF */
+ /* UNIMPL case SO_OOBINLINE: */
+ /* UNIMPL case SO_SNDBUF: */
+ /* UNIMPL case SO_RCVLOWAT: */
+ /* UNIMPL case SO_SNDLOWAT: */
+#if SO_REUSE
+ case SO_REUSEADDR:
+ case SO_REUSEPORT:
+#endif /* SO_REUSE */
+ case SO_TYPE:
+ /* UNIMPL case SO_USELOOPBACK: */
+ if (*optlen < sizeof(int)) {
+ err = EINVAL;
+ }
+ break;
+
+ case SO_NO_CHECK:
+ if (*optlen < sizeof(int)) {
+ err = EINVAL;
+ }
+#if LWIP_UDP
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_UDP ||
+ ((udp_flags(sock->conn->pcb.udp) & UDP_FLAGS_UDPLITE) != 0)) {
+ /* this flag is only available for UDP, not for UDP lite */
+ err = EAFNOSUPPORT;
+ }
+#endif /* LWIP_UDP */
+ break;
+
+ default:
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, UNIMPL: optname=0x%x, ..)\n",
+ s, optname));
+ err = ENOPROTOOPT;
+ } /* switch (optname) */
+ break;
+
+/* Level: IPPROTO_IP */
+ case IPPROTO_IP:
+ switch (optname) {
+ /* UNIMPL case IP_HDRINCL: */
+ /* UNIMPL case IP_RCVDSTADDR: */
+ /* UNIMPL case IP_RCVIF: */
+ case IP_TTL:
+ case IP_TOS:
+ if (*optlen < sizeof(int)) {
+ err = EINVAL;
+ }
+ break;
+#if LWIP_IGMP
+ case IP_MULTICAST_TTL:
+ if (*optlen < sizeof(u8_t)) {
+ err = EINVAL;
+ }
+ break;
+ case IP_MULTICAST_IF:
+ if (*optlen < sizeof(struct in_addr)) {
+ err = EINVAL;
+ }
+ break;
+ case IP_MULTICAST_LOOP:
+ if (*optlen < sizeof(u8_t)) {
+ err = EINVAL;
+ }
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_UDP) {
+ err = EAFNOSUPPORT;
+ }
+ break;
+#endif /* LWIP_IGMP */
+
+ default:
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, UNIMPL: optname=0x%x, ..)\n",
+ s, optname));
+ err = ENOPROTOOPT;
+ } /* switch (optname) */
+ break;
+
+#if LWIP_TCP
+/* Level: IPPROTO_TCP */
+ case IPPROTO_TCP:
+ if (*optlen < sizeof(int)) {
+ err = EINVAL;
+ break;
+ }
+
+ /* If this is no TCP socket, ignore any options. */
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP)
+ return 0;
+
+ switch (optname) {
+ case TCP_NODELAY:
+ case TCP_KEEPALIVE:
+#if LWIP_TCP_KEEPALIVE
+ case TCP_KEEPIDLE:
+ case TCP_KEEPINTVL:
+ case TCP_KEEPCNT:
+#endif /* LWIP_TCP_KEEPALIVE */
+ break;
+
+ default:
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, UNIMPL: optname=0x%x, ..)\n",
+ s, optname));
+ err = ENOPROTOOPT;
+ } /* switch (optname) */
+ break;
+#endif /* LWIP_TCP */
+
+#if LWIP_IPV6
+/* Level: IPPROTO_IPV6 */
+ case IPPROTO_IPV6:
+ switch (optname) {
+ case IPV6_V6ONLY:
+ if (*optlen < sizeof(int)) {
+ err = EINVAL;
+ }
+ /* @todo: this does not work for datagram sockets, yet */
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP)
+ return 0;
+ break;
+ default:
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IPV6, UNIMPL: optname=0x%x, ..)\n",
+ s, optname));
+ err = ENOPROTOOPT;
+ } /* switch (optname) */
+ break;
+#endif /* LWIP_IPV6 */
+
+#if LWIP_UDP && LWIP_UDPLITE
+/* Level: IPPROTO_UDPLITE */
+ case IPPROTO_UDPLITE:
+ if (*optlen < sizeof(int)) {
+ err = EINVAL;
+ break;
+ }
+
+ /* If this is no UDP lite socket, ignore any options. */
+ if (!NETCONNTYPE_ISUDPLITE(netconn_type(sock->conn))) {
+ return 0;
+ }
+
+ switch (optname) {
+ case UDPLITE_SEND_CSCOV:
+ case UDPLITE_RECV_CSCOV:
+ break;
+
+ default:
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_UDPLITE, UNIMPL: optname=0x%x, ..)\n",
+ s, optname));
+ err = ENOPROTOOPT;
+ } /* switch (optname) */
+ break;
+#endif /* LWIP_UDP && LWIP_UDPLITE*/
+ /* Level: IPPROTO_RAW */
+ case IPPROTO_RAW:
+ switch (optname) {
+#if LWIP_IPV6
+ case IPV6_CHECKSUM:
+ if (*optlen < sizeof(int)) {
+ err = EINVAL;
+ break;
+ }
+#endif /* LWIP_IPV6 */
+ default:
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_RAW, UNIMPL: optname=0x%x, ..)\n",
+ s, optname));
+ err = ENOPROTOOPT;
+ } /* switch (optname) */
+ break;
+/* UNDEFINED LEVEL */
+ default:
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, level=0x%x, UNIMPL: optname=0x%x, ..)\n",
+ s, level, optname));
+ err = ENOPROTOOPT;
+ } /* switch */
+
+
+ if (err != ERR_OK) {
+ sock_set_errno(sock, err);
+ return -1;
+ }
+
+ /* Now do the actual option processing */
+ data.sock = sock;
+#ifdef LWIP_DEBUG
+ data.s = s;
+#endif /* LWIP_DEBUG */
+ data.level = level;
+ data.optname = optname;
+ data.optval = optval;
+ data.optlen = optlen;
+ data.err = err;
+ tcpip_callback(lwip_getsockopt_internal, &data);
+ sys_arch_sem_wait(&sock->conn->op_completed, 0);
+ /* maybe lwip_getsockopt_internal has changed err */
+ err = data.err;
+
+ sock_set_errno(sock, err);
+ return err ? -1 : 0;
+}
+
+static void
+lwip_getsockopt_internal(void *arg)
+{
+ struct lwip_sock *sock;
+#ifdef LWIP_DEBUG
+ int s;
+#endif /* LWIP_DEBUG */
+ int level, optname;
+ void *optval;
+ struct lwip_setgetsockopt_data *data;
+
+ LWIP_ASSERT("arg != NULL", arg != NULL);
+
+ data = (struct lwip_setgetsockopt_data*)arg;
+ sock = data->sock;
+#ifdef LWIP_DEBUG
+ s = data->s;
+#endif /* LWIP_DEBUG */
+ level = data->level;
+ optname = data->optname;
+ optval = data->optval;
+
+ switch (level) {
+
+/* Level: SOL_SOCKET */
+ case SOL_SOCKET:
+ switch (optname) {
+
+ /* The option flags */
+ case SO_ACCEPTCONN:
+ case SO_BROADCAST:
+ /* UNIMPL case SO_DEBUG: */
+ /* UNIMPL case SO_DONTROUTE: */
+ case SO_KEEPALIVE:
+ /* UNIMPL case SO_OOBINCLUDE: */
+#if SO_REUSE
+ case SO_REUSEADDR:
+ case SO_REUSEPORT:
+#endif /* SO_REUSE */
+ /*case SO_USELOOPBACK: UNIMPL */
+ *(int*)optval = ip_get_option(sock->conn->pcb.ip, optname);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, optname=0x%x, ..) = %s\n",
+ s, optname, (*(int*)optval?"on":"off")));
+ break;
+
+ case SO_TYPE:
+ switch (NETCONNTYPE_GROUP(netconn_type(sock->conn))) {
+ case NETCONN_RAW:
+ *(int*)optval = SOCK_RAW;
+ break;
+ case NETCONN_TCP:
+ *(int*)optval = SOCK_STREAM;
+ break;
+ case NETCONN_UDP:
+ *(int*)optval = SOCK_DGRAM;
+ break;
+ default: /* unrecognized socket type */
+ *(int*)optval = netconn_type(sock->conn);
+ LWIP_DEBUGF(SOCKETS_DEBUG,
+ ("lwip_getsockopt(%d, SOL_SOCKET, SO_TYPE): unrecognized socket type %d\n",
+ s, *(int *)optval));
+ } /* switch (netconn_type(sock->conn)) */
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, SO_TYPE) = %d\n",
+ s, *(int *)optval));
+ break;
+
+ case SO_ERROR:
+ /* only overwrite ERR_OK or tempoary errors */
+ if ((sock->err == 0) || (sock->err == EINPROGRESS)) {
+ sock_set_errno(sock, err_to_errno(sock->conn->last_err));
+ }
+ *(int *)optval = sock->err;
+ sock->err = 0;
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, SO_ERROR) = %d\n",
+ s, *(int *)optval));
+ break;
+
+#if LWIP_SO_SNDTIMEO
+ case SO_SNDTIMEO:
+ *(int *)optval = netconn_get_sendtimeout(sock->conn);
+ break;
+#endif /* LWIP_SO_SNDTIMEO */
+#if LWIP_SO_RCVTIMEO
+ case SO_RCVTIMEO:
+ *(int *)optval = netconn_get_recvtimeout(sock->conn);
+ break;
+#endif /* LWIP_SO_RCVTIMEO */
+#if LWIP_SO_RCVBUF
+ case SO_RCVBUF:
+ *(int *)optval = netconn_get_recvbufsize(sock->conn);
+ break;
+#endif /* LWIP_SO_RCVBUF */
+#if LWIP_UDP
+ case SO_NO_CHECK:
+ *(int*)optval = (udp_flags(sock->conn->pcb.udp) & UDP_FLAGS_NOCHKSUM) ? 1 : 0;
+ break;
+#endif /* LWIP_UDP*/
+ default:
+ LWIP_ASSERT("unhandled optname", 0);
+ break;
+ } /* switch (optname) */
+ break;
+
+/* Level: IPPROTO_IP */
+ case IPPROTO_IP:
+ switch (optname) {
+ case IP_TTL:
+ *(int*)optval = sock->conn->pcb.ip->ttl;
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_TTL) = %d\n",
+ s, *(int *)optval));
+ break;
+ case IP_TOS:
+ *(int*)optval = sock->conn->pcb.ip->tos;
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_TOS) = %d\n",
+ s, *(int *)optval));
+ break;
+#if LWIP_IGMP
+ case IP_MULTICAST_TTL:
+ *(u8_t*)optval = sock->conn->pcb.ip->ttl;
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_TTL) = %d\n",
+ s, *(int *)optval));
+ break;
+ case IP_MULTICAST_IF:
+ inet_addr_from_ipaddr((struct in_addr*)optval, &sock->conn->pcb.udp->multicast_ip);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_IF) = 0x%"X32_F"\n",
+ s, *(u32_t *)optval));
+ break;
+ case IP_MULTICAST_LOOP:
+ if ((sock->conn->pcb.udp->flags & UDP_FLAGS_MULTICAST_LOOP) != 0) {
+ *(u8_t*)optval = 1;
+ } else {
+ *(u8_t*)optval = 0;
+ }
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_LOOP) = %d\n",
+ s, *(int *)optval));
+ break;
+#endif /* LWIP_IGMP */
+ default:
+ LWIP_ASSERT("unhandled optname", 0);
+ break;
+ } /* switch (optname) */
+ break;
+
+#if LWIP_TCP
+/* Level: IPPROTO_TCP */
+ case IPPROTO_TCP:
+ switch (optname) {
+ case TCP_NODELAY:
+ *(int*)optval = tcp_nagle_disabled(sock->conn->pcb.tcp);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, TCP_NODELAY) = %s\n",
+ s, (*(int*)optval)?"on":"off") );
+ break;
+ case TCP_KEEPALIVE:
+ *(int*)optval = (int)sock->conn->pcb.tcp->keep_idle;
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPALIVE) = %d\n",
+ s, *(int *)optval));
+ break;
+
+#if LWIP_TCP_KEEPALIVE
+ case TCP_KEEPIDLE:
+ *(int*)optval = (int)(sock->conn->pcb.tcp->keep_idle/1000);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPIDLE) = %d\n",
+ s, *(int *)optval));
+ break;
+ case TCP_KEEPINTVL:
+ *(int*)optval = (int)(sock->conn->pcb.tcp->keep_intvl/1000);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPINTVL) = %d\n",
+ s, *(int *)optval));
+ break;
+ case TCP_KEEPCNT:
+ *(int*)optval = (int)sock->conn->pcb.tcp->keep_cnt;
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPCNT) = %d\n",
+ s, *(int *)optval));
+ break;
+#endif /* LWIP_TCP_KEEPALIVE */
+ default:
+ LWIP_ASSERT("unhandled optname", 0);
+ break;
+ } /* switch (optname) */
+ break;
+#endif /* LWIP_TCP */
+
+#if LWIP_IPV6
+/* Level: IPPROTO_IPV6 */
+ case IPPROTO_IPV6:
+ switch (optname) {
+ case IPV6_V6ONLY:
+ *(int*)optval = ((sock->conn->flags & NETCONN_FLAG_IPV6_V6ONLY) ? 1 : 0);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IPV6, IPV6_V6ONLY) = %d\n",
+ s, *(int *)optval));
+ break;
+ default:
+ LWIP_ASSERT("unhandled optname", 0);
+ break;
+ } /* switch (optname) */
+ break;
+#endif /* LWIP_IPV6 */
+
+#if LWIP_UDP && LWIP_UDPLITE
+ /* Level: IPPROTO_UDPLITE */
+ case IPPROTO_UDPLITE:
+ switch (optname) {
+ case UDPLITE_SEND_CSCOV:
+ *(int*)optval = sock->conn->pcb.udp->chksum_len_tx;
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV) = %d\n",
+ s, (*(int*)optval)) );
+ break;
+ case UDPLITE_RECV_CSCOV:
+ *(int*)optval = sock->conn->pcb.udp->chksum_len_rx;
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV) = %d\n",
+ s, (*(int*)optval)) );
+ break;
+ default:
+ LWIP_ASSERT("unhandled optname", 0);
+ break;
+ } /* switch (optname) */
+ break;
+#endif /* LWIP_UDP */
+ /* Level: IPPROTO_RAW */
+ case IPPROTO_RAW:
+ switch (optname) {
+#if LWIP_IPV6
+ case IPV6_CHECKSUM:
+ if (sock->conn->pcb.raw->chksum_reqd == 0)
+ *(int *)optval = -1;
+ else
+ *(int *)optval = sock->conn->pcb.raw->chksum_offset;
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_RAW, IPV6_CHECKSUM) = %d\n",
+ s, (*(int*)optval)) );
+ break;
+#endif /* LWIP_IPV6 */
+ default:
+ LWIP_ASSERT("unhandled optname", 0);
+ break;
+ } /* switch (optname) */
+ break;
+ default:
+ LWIP_ASSERT("unhandled level", 0);
+ break;
+ } /* switch (level) */
+ sys_sem_signal(&sock->conn->op_completed);
+}
+
+int
+lwip_setsockopt(int s, int level, int optname, const void *optval, socklen_t optlen)
+{
+ struct lwip_sock *sock = get_socket(s);
+ err_t err = ERR_OK;
+ struct lwip_setgetsockopt_data data;
+
+ if (!sock) {
+ return -1;
+ }
+
+ if (NULL == optval) {
+ sock_set_errno(sock, EFAULT);
+ return -1;
+ }
+
+ /* Do length and type checks for the various options first, to keep it readable. */
+ switch (level) {
+
+/* Level: SOL_SOCKET */
+ case SOL_SOCKET:
+ switch (optname) {
+
+ case SO_BROADCAST:
+ /* UNIMPL case SO_DEBUG: */
+ /* UNIMPL case SO_DONTROUTE: */
+ case SO_KEEPALIVE:
+ /* UNIMPL case case SO_CONTIMEO: */
+#if LWIP_SO_SNDTIMEO
+ case SO_SNDTIMEO:
+#endif /* LWIP_SO_SNDTIMEO */
+#if LWIP_SO_RCVTIMEO
+ case SO_RCVTIMEO:
+#endif /* LWIP_SO_RCVTIMEO */
+#if LWIP_SO_RCVBUF
+ case SO_RCVBUF:
+#endif /* LWIP_SO_RCVBUF */
+ /* UNIMPL case SO_OOBINLINE: */
+ /* UNIMPL case SO_SNDBUF: */
+ /* UNIMPL case SO_RCVLOWAT: */
+ /* UNIMPL case SO_SNDLOWAT: */
+#if SO_REUSE
+ case SO_REUSEADDR:
+ case SO_REUSEPORT:
+#endif /* SO_REUSE */
+ /* UNIMPL case SO_USELOOPBACK: */
+ if (optlen < sizeof(int)) {
+ err = EINVAL;
+ }
+ break;
+ case SO_NO_CHECK:
+ if (optlen < sizeof(int)) {
+ err = EINVAL;
+ }
+#if LWIP_UDP
+ if ((NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_UDP) ||
+ ((udp_flags(sock->conn->pcb.udp) & UDP_FLAGS_UDPLITE) != 0)) {
+ /* this flag is only available for UDP, not for UDP lite */
+ err = EAFNOSUPPORT;
+ }
+#endif /* LWIP_UDP */
+ break;
+ default:
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, SOL_SOCKET, UNIMPL: optname=0x%x, ..)\n",
+ s, optname));
+ err = ENOPROTOOPT;
+ } /* switch (optname) */
+ break;
+
+/* Level: IPPROTO_IP */
+ case IPPROTO_IP:
+ switch (optname) {
+ /* UNIMPL case IP_HDRINCL: */
+ /* UNIMPL case IP_RCVDSTADDR: */
+ /* UNIMPL case IP_RCVIF: */
+ case IP_TTL:
+ case IP_TOS:
+ if (optlen < sizeof(int)) {
+ err = EINVAL;
+ }
+ break;
+#if LWIP_IGMP
+ case IP_MULTICAST_TTL:
+ if (optlen < sizeof(u8_t)) {
+ err = EINVAL;
+ }
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_UDP) {
+ err = EAFNOSUPPORT;
+ }
+ break;
+ case IP_MULTICAST_IF:
+ if (optlen < sizeof(struct in_addr)) {
+ err = EINVAL;
+ }
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_UDP) {
+ err = EAFNOSUPPORT;
+ }
+ break;
+ case IP_MULTICAST_LOOP:
+ if (optlen < sizeof(u8_t)) {
+ err = EINVAL;
+ }
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_UDP) {
+ err = EAFNOSUPPORT;
+ }
+ break;
+ case IP_ADD_MEMBERSHIP:
+ case IP_DROP_MEMBERSHIP:
+ if (optlen < sizeof(struct ip_mreq)) {
+ err = EINVAL;
+ }
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_UDP) {
+ err = EAFNOSUPPORT;
+ }
+ break;
+#endif /* LWIP_IGMP */
+ default:
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, UNIMPL: optname=0x%x, ..)\n",
+ s, optname));
+ err = ENOPROTOOPT;
+ } /* switch (optname) */
+ break;
+
+#if LWIP_TCP
+/* Level: IPPROTO_TCP */
+ case IPPROTO_TCP:
+ if (optlen < sizeof(int)) {
+ err = EINVAL;
+ break;
+ }
+
+ /* If this is no TCP socket, ignore any options. */
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP)
+ return 0;
+
+ switch (optname) {
+ case TCP_NODELAY:
+ case TCP_KEEPALIVE:
+#if LWIP_TCP_KEEPALIVE
+ case TCP_KEEPIDLE:
+ case TCP_KEEPINTVL:
+ case TCP_KEEPCNT:
+#endif /* LWIP_TCP_KEEPALIVE */
+ break;
+
+ default:
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, UNIMPL: optname=0x%x, ..)\n",
+ s, optname));
+ err = ENOPROTOOPT;
+ } /* switch (optname) */
+ break;
+#endif /* LWIP_TCP */
+
+#if LWIP_IPV6
+/* Level: IPPROTO_IPV6 */
+ case IPPROTO_IPV6:
+ switch (optname) {
+ case IPV6_V6ONLY:
+ if (optlen < sizeof(int)) {
+ err = EINVAL;
+ }
+
+ /* @todo: this does not work for datagram sockets, yet */
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP)
+ return 0;
+
+ break;
+ case IPV6_CHECKSUM:
+ err = EINVAL;
+ break;
+ default:
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IPV6, UNIMPL: optname=0x%x, ..)\n",
+ s, optname));
+ err = ENOPROTOOPT;
+ } /* switch (optname) */
+ break;
+ case IPPROTO_ICMPV6:
+ switch (optname) {
+ case IPV6_CHECKSUM:
+ err = EINVAL;
+ break;
+ default:
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_ICMPV6, UNIMPL: optname=0x%x, ..)\n",
+ s, optname));
+ err = ENOPROTOOPT;
+ } /* switch (optname) */
+ break;
+#endif /* LWIP_IPV6 */
+
+#if LWIP_UDP && LWIP_UDPLITE
+/* Level: IPPROTO_UDPLITE */
+ case IPPROTO_UDPLITE:
+ if (optlen < sizeof(int)) {
+ err = EINVAL;
+ break;
+ }
+
+ /* If this is no UDP lite socket, ignore any options. */
+ if (!NETCONNTYPE_ISUDPLITE(netconn_type(sock->conn)))
+ return 0;
+
+ switch (optname) {
+ case UDPLITE_SEND_CSCOV:
+ case UDPLITE_RECV_CSCOV:
+ break;
+
+ default:
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_UDPLITE, UNIMPL: optname=0x%x, ..)\n",
+ s, optname));
+ err = ENOPROTOOPT;
+ } /* switch (optname) */
+ break;
+#endif /* LWIP_UDP && LWIP_UDPLITE */
+/* Level: IPPROTO_RAW */
+ case IPPROTO_RAW:
+ switch (optname) {
+#if LWIP_IPV6
+ case IPV6_CHECKSUM:
+ /* Per RFC3542, odd offsets are not allowed */
+ if ((*(int *)optval > 0) && (*(int *)optval & 1))
+ err = EINVAL;
+ break;
+#endif /* LWIP_IPV6 */
+ default:
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_RAW, UNIMPL: optname=0x%x, ..)\n",
+ s, optname));
+ err = ENOPROTOOPT;
+ } /* switch (optname) */
+ break;
+/* UNDEFINED LEVEL */
+ default:
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, level=0x%x, UNIMPL: optname=0x%x, ..)\n",
+ s, level, optname));
+ err = ENOPROTOOPT;
+ } /* switch (level) */
+
+
+ if (err != ERR_OK) {
+ sock_set_errno(sock, err);
+ return -1;
+ }
+
+
+ /* Now do the actual option processing */
+ data.sock = sock;
+#ifdef LWIP_DEBUG
+ data.s = s;
+#endif /* LWIP_DEBUG */
+ data.level = level;
+ data.optname = optname;
+ data.optval = (void*)optval;
+ data.optlen = &optlen;
+ data.err = err;
+ tcpip_callback(lwip_setsockopt_internal, &data);
+ sys_arch_sem_wait(&sock->conn->op_completed, 0);
+ /* maybe lwip_setsockopt_internal has changed err */
+ err = data.err;
+
+ sock_set_errno(sock, err);
+ return err ? -1 : 0;
+}
+
+static void
+lwip_setsockopt_internal(void *arg)
+{
+ struct lwip_sock *sock;
+#ifdef LWIP_DEBUG
+ int s;
+#endif /* LWIP_DEBUG */
+ int level, optname;
+ const void *optval;
+ struct lwip_setgetsockopt_data *data;
+
+ LWIP_ASSERT("arg != NULL", arg != NULL);
+
+ data = (struct lwip_setgetsockopt_data*)arg;
+ sock = data->sock;
+#ifdef LWIP_DEBUG
+ s = data->s;
+#endif /* LWIP_DEBUG */
+ level = data->level;
+ optname = data->optname;
+ optval = data->optval;
+
+ switch (level) {
+
+/* Level: SOL_SOCKET */
+ case SOL_SOCKET:
+ switch (optname) {
+
+ /* The option flags */
+ case SO_BROADCAST:
+ /* UNIMPL case SO_DEBUG: */
+ /* UNIMPL case SO_DONTROUTE: */
+ case SO_KEEPALIVE:
+ /* UNIMPL case SO_OOBINCLUDE: */
+#if SO_REUSE
+ case SO_REUSEADDR:
+ case SO_REUSEPORT:
+#endif /* SO_REUSE */
+ /* UNIMPL case SO_USELOOPBACK: */
+ if (*(int*)optval) {
+ ip_set_option(sock->conn->pcb.ip, optname);
+ } else {
+ ip_reset_option(sock->conn->pcb.ip, optname);
+ }
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, SOL_SOCKET, optname=0x%x, ..) -> %s\n",
+ s, optname, (*(int*)optval?"on":"off")));
+ break;
+#if LWIP_SO_SNDTIMEO
+ case SO_SNDTIMEO:
+ netconn_set_sendtimeout(sock->conn, (s32_t)*(int*)optval);
+ break;
+#endif /* LWIP_SO_SNDTIMEO */
+#if LWIP_SO_RCVTIMEO
+ case SO_RCVTIMEO:
+ netconn_set_recvtimeout(sock->conn, *(int*)optval);
+ break;
+#endif /* LWIP_SO_RCVTIMEO */
+#if LWIP_SO_RCVBUF
+ case SO_RCVBUF:
+ netconn_set_recvbufsize(sock->conn, *(int*)optval);
+ break;
+#endif /* LWIP_SO_RCVBUF */
+#if LWIP_UDP
+ case SO_NO_CHECK:
+ if (*(int*)optval) {
+ udp_setflags(sock->conn->pcb.udp, udp_flags(sock->conn->pcb.udp) | UDP_FLAGS_NOCHKSUM);
+ } else {
+ udp_setflags(sock->conn->pcb.udp, udp_flags(sock->conn->pcb.udp) & ~UDP_FLAGS_NOCHKSUM);
+ }
+ break;
+#endif /* LWIP_UDP */
+ default:
+ LWIP_ASSERT("unhandled optname", 0);
+ break;
+ } /* switch (optname) */
+ break;
+
+/* Level: IPPROTO_IP */
+ case IPPROTO_IP:
+ switch (optname) {
+ case IP_TTL:
+ sock->conn->pcb.ip->ttl = (u8_t)(*(int*)optval);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, IP_TTL, ..) -> %d\n",
+ s, sock->conn->pcb.ip->ttl));
+ break;
+ case IP_TOS:
+ sock->conn->pcb.ip->tos = (u8_t)(*(int*)optval);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, IP_TOS, ..)-> %d\n",
+ s, sock->conn->pcb.ip->tos));
+ break;
+#if LWIP_IGMP
+ case IP_MULTICAST_TTL:
+ sock->conn->pcb.udp->ttl = (u8_t)(*(u8_t*)optval);
+ break;
+ case IP_MULTICAST_IF:
+ inet_addr_to_ipaddr(&sock->conn->pcb.udp->multicast_ip, (struct in_addr*)optval);
+ break;
+ case IP_MULTICAST_LOOP:
+ if (*(u8_t*)optval) {
+ udp_setflags(sock->conn->pcb.udp, udp_flags(sock->conn->pcb.udp) | UDP_FLAGS_MULTICAST_LOOP);
+ } else {
+ udp_setflags(sock->conn->pcb.udp, udp_flags(sock->conn->pcb.udp) & ~UDP_FLAGS_MULTICAST_LOOP);
+ }
+ break;
+ case IP_ADD_MEMBERSHIP:
+ case IP_DROP_MEMBERSHIP:
+ {
+ /* If this is a TCP or a RAW socket, ignore these options. */
+ struct ip_mreq *imr = (struct ip_mreq *)optval;
+ ip_addr_t if_addr;
+ ip_addr_t multi_addr;
+ inet_addr_to_ipaddr(&if_addr, &imr->imr_interface);
+ inet_addr_to_ipaddr(&multi_addr, &imr->imr_multiaddr);
+ if(optname == IP_ADD_MEMBERSHIP){
+ data->err = igmp_joingroup(&if_addr, &multi_addr);
+ } else {
+ data->err = igmp_leavegroup(&if_addr, &multi_addr);
+ }
+ if(data->err != ERR_OK) {
+ data->err = EADDRNOTAVAIL;
+ }
+ }
+ break;
+#endif /* LWIP_IGMP */
+ default:
+ LWIP_ASSERT("unhandled optname", 0);
+ break;
+ } /* switch (optname) */
+ break;
+
+#if LWIP_TCP
+/* Level: IPPROTO_TCP */
+ case IPPROTO_TCP:
+ switch (optname) {
+ case TCP_NODELAY:
+ if (*(int*)optval) {
+ tcp_nagle_disable(sock->conn->pcb.tcp);
+ } else {
+ tcp_nagle_enable(sock->conn->pcb.tcp);
+ }
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_NODELAY) -> %s\n",
+ s, (*(int *)optval)?"on":"off") );
+ break;
+ case TCP_KEEPALIVE:
+ sock->conn->pcb.tcp->keep_idle = (u32_t)(*(int*)optval);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPALIVE) -> %"U32_F"\n",
+ s, sock->conn->pcb.tcp->keep_idle));
+ break;
+
+#if LWIP_TCP_KEEPALIVE
+ case TCP_KEEPIDLE:
+ sock->conn->pcb.tcp->keep_idle = 1000*(u32_t)(*(int*)optval);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPIDLE) -> %"U32_F"\n",
+ s, sock->conn->pcb.tcp->keep_idle));
+ break;
+ case TCP_KEEPINTVL:
+ sock->conn->pcb.tcp->keep_intvl = 1000*(u32_t)(*(int*)optval);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPINTVL) -> %"U32_F"\n",
+ s, sock->conn->pcb.tcp->keep_intvl));
+ break;
+ case TCP_KEEPCNT:
+ sock->conn->pcb.tcp->keep_cnt = (u32_t)(*(int*)optval);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPCNT) -> %"U32_F"\n",
+ s, sock->conn->pcb.tcp->keep_cnt));
+ break;
+#endif /* LWIP_TCP_KEEPALIVE */
+ default:
+ LWIP_ASSERT("unhandled optname", 0);
+ break;
+ } /* switch (optname) */
+ break;
+#endif /* LWIP_TCP*/
+
+#if LWIP_IPV6
+/* Level: IPPROTO_IPV6 */
+ case IPPROTO_IPV6:
+ switch (optname) {
+ case IPV6_V6ONLY:
+ if (*(int*)optval) {
+ sock->conn->flags |= NETCONN_FLAG_IPV6_V6ONLY;
+ } else {
+ sock->conn->flags &= ~NETCONN_FLAG_IPV6_V6ONLY;
+ }
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IPV6, IPV6_V6ONLY, ..) -> %d\n",
+ s, ((sock->conn->flags & NETCONN_FLAG_IPV6_V6ONLY) ? 1 : 0)));
+ break;
+ default:
+ LWIP_ASSERT("unhandled optname", 0);
+ break;
+ } /* switch (optname) */
+ break;
+#endif /* LWIP_IPV6 */
+
+#if LWIP_UDP && LWIP_UDPLITE
+ /* Level: IPPROTO_UDPLITE */
+ case IPPROTO_UDPLITE:
+ switch (optname) {
+ case UDPLITE_SEND_CSCOV:
+ if ((*(int*)optval != 0) && ((*(int*)optval < 8) || (*(int*)optval > 0xffff))) {
+ /* don't allow illegal values! */
+ sock->conn->pcb.udp->chksum_len_tx = 8;
+ } else {
+ sock->conn->pcb.udp->chksum_len_tx = (u16_t)*(int*)optval;
+ }
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV) -> %d\n",
+ s, (*(int*)optval)) );
+ break;
+ case UDPLITE_RECV_CSCOV:
+ if ((*(int*)optval != 0) && ((*(int*)optval < 8) || (*(int*)optval > 0xffff))) {
+ /* don't allow illegal values! */
+ sock->conn->pcb.udp->chksum_len_rx = 8;
+ } else {
+ sock->conn->pcb.udp->chksum_len_rx = (u16_t)*(int*)optval;
+ }
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV) -> %d\n",
+ s, (*(int*)optval)) );
+ break;
+ default:
+ LWIP_ASSERT("unhandled optname", 0);
+ break;
+ } /* switch (optname) */
+ break;
+#endif /* LWIP_UDP */
+ /* Level: IPPROTO_RAW */
+ case IPPROTO_RAW:
+ switch (optname) {
+#if LWIP_IPV6
+ case IPV6_CHECKSUM:
+ if (*(int *)optval < 0) {
+ sock->conn->pcb.raw->chksum_reqd = 0;
+ } else {
+ sock->conn->pcb.raw->chksum_reqd = 1;
+ sock->conn->pcb.raw->chksum_offset = *(int *)optval;
+ }
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_RAW, IPV6_CHECKSUM, ..) -> %d\n",
+ s, sock->conn->pcb.raw->chksum_reqd));
+ break;
+#endif /* LWIP_IPV6 */
+ default:
+ LWIP_ASSERT("unhandled optname", 0);
+ break;
+ } /* switch (optname) */
+ break;
+ default:
+ LWIP_ASSERT("unhandled level", 0);
+ break;
+ } /* switch (level) */
+ sys_sem_signal(&sock->conn->op_completed);
+}
+
+int
+lwip_ioctl(int s, long cmd, void *argp)
+{
+ struct lwip_sock *sock = get_socket(s);
+ u8_t val;
+#if LWIP_SO_RCVBUF
+ u16_t buflen = 0;
+ s16_t recv_avail;
+#endif /* LWIP_SO_RCVBUF */
+
+ if (!sock) {
+ return -1;
+ }
+
+ switch (cmd) {
+#if LWIP_SO_RCVBUF || LWIP_FIONREAD_LINUXMODE
+ case FIONREAD:
+ if (!argp) {
+ sock_set_errno(sock, EINVAL);
+ return -1;
+ }
+#if LWIP_FIONREAD_LINUXMODE
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) {
+ struct pbuf *p;
+ if (sock->lastdata) {
+ p = ((struct netbuf *)sock->lastdata)->p;
+ } else {
+ struct netbuf *rxbuf;
+ err_t err;
+ if (sock->rcvevent <= 0) {
+ *((u16_t*)argp) = 0;
+ } else {
+ err = netconn_recv(sock->conn, &rxbuf);
+ if (err != ERR_OK) {
+ *((u16_t*)argp) = 0;
+ } else {
+ sock->lastdata = rxbuf;
+ *((u16_t*)argp) = rxbuf->p->tot_len;
+ }
+ }
+ }
+ return 0;
+ }
+#endif /* LWIP_FIONREAD_LINUXMODE */
+
+#if LWIP_SO_RCVBUF
+ /* we come here if either LWIP_FIONREAD_LINUXMODE==0 or this is a TCP socket */
+ SYS_ARCH_GET(sock->conn->recv_avail, recv_avail);
+ if (recv_avail < 0) {
+ recv_avail = 0;
+ }
+ *((u16_t*)argp) = (u16_t)recv_avail;
+
+ /* Check if there is data left from the last recv operation. /maq 041215 */
+ if (sock->lastdata) {
+ struct pbuf *p = (struct pbuf *)sock->lastdata;
+ if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) {
+ p = ((struct netbuf *)p)->p;
+ }
+ buflen = p->tot_len;
+ buflen -= sock->lastoffset;
+
+ *((u16_t*)argp) += buflen;
+ }
+
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, FIONREAD, %p) = %"U16_F"\n", s, argp, *((u16_t*)argp)));
+ sock_set_errno(sock, 0);
+ return 0;
+#else /* LWIP_SO_RCVBUF */
+ break;
+#endif /* LWIP_SO_RCVBUF */
+#endif /* LWIP_SO_RCVBUF || LWIP_FIONREAD_LINUXMODE */
+
+ case FIONBIO:
+ val = 0;
+ if (argp && *(u32_t*)argp) {
+ val = 1;
+ }
+ netconn_set_nonblocking(sock->conn, val);
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, FIONBIO, %d)\n", s, val));
+ sock_set_errno(sock, 0);
+ return 0;
+
+ default:
+ break;
+ } /* switch (cmd) */
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, UNIMPL: 0x%lx, %p)\n", s, cmd, argp));
+ sock_set_errno(sock, ENOSYS); /* not yet implemented */
+ return -1;
+}
+
+/** A minimal implementation of fcntl.
+ * Currently only the commands F_GETFL and F_SETFL are implemented.
+ * Only the flag O_NONBLOCK is implemented.
+ */
+int
+lwip_fcntl(int s, int cmd, int val)
+{
+ struct lwip_sock *sock = get_socket(s);
+ int ret = -1;
+
+ if (!sock || !sock->conn) {
+ return -1;
+ }
+
+ switch (cmd) {
+ case F_GETFL:
+ ret = netconn_is_nonblocking(sock->conn) ? O_NONBLOCK : 0;
+ break;
+ case F_SETFL:
+ if ((val & ~O_NONBLOCK) == 0) {
+ /* only O_NONBLOCK, all other bits are zero */
+ netconn_set_nonblocking(sock->conn, val & O_NONBLOCK);
+ ret = 0;
+ }
+ break;
+ default:
+ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_fcntl(%d, UNIMPL: %d, %d)\n", s, cmd, val));
+ break;
+ }
+ return ret;
+}
+
+#endif /* LWIP_SOCKET */
diff --git a/lwip/src/api/tcpip.c b/lwip/src/api/tcpip.c
new file mode 100644
index 0000000..1432cbd
--- /dev/null
+++ b/lwip/src/api/tcpip.c
@@ -0,0 +1,541 @@
+/**
+ * @file
+ * Sequential API Main thread module
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if !NO_SYS /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/sys.h"
+#include "lwip/memp.h"
+#include "lwip/mem.h"
+#include "lwip/pbuf.h"
+#include "lwip/tcpip.h"
+#include "lwip/init.h"
+#include "netif/etharp.h"
+#include "netif/ppp_oe.h"
+
+/* global variables */
+static sys_thread_t tcpip_thread_obj;
+static tcpip_init_done_fn tcpip_init_done;
+static tcpip_will_finish_fn tcpip_will_finish;
+static void *tcpip_init_done_arg;
+static void *tcpip_will_finish_arg;
+static sys_mbox_t mbox;
+
+#if LWIP_TCPIP_CORE_LOCKING
+/** The global semaphore to lock the stack. */
+sys_mutex_t lock_tcpip_core;
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+
+
+/**
+ * The main lwIP thread. This thread has exclusive access to lwIP core functions
+ * (unless access to them is not locked). Other threads communicate with this
+ * thread using message boxes.
+ *
+ * It also starts all the timers to make sure they are running in the right
+ * thread context.
+ *
+ * @param arg unused argument
+ */
+static void
+tcpip_thread(void *arg)
+{
+ struct tcpip_msg *msg;
+ int finish = 0;
+ LWIP_UNUSED_ARG(arg);
+
+ if (tcpip_init_done != NULL) {
+ tcpip_init_done(tcpip_init_done_arg);
+ }
+
+ LOCK_TCPIP_CORE();
+ while (!finish) { /* MAIN Loop */
+ UNLOCK_TCPIP_CORE();
+ LWIP_TCPIP_THREAD_ALIVE();
+ /* wait for a message, timeouts are processed while waiting */
+ sys_timeouts_mbox_fetch(&mbox, (void **)&msg);
+ LOCK_TCPIP_CORE();
+ switch (msg->type) {
+#if LWIP_NETCONN
+ case TCPIP_MSG_API:
+ LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API message %p\n", (void *)msg));
+ msg->msg.apimsg->function(&(msg->msg.apimsg->msg));
+ break;
+#endif /* LWIP_NETCONN */
+
+#if !LWIP_TCPIP_CORE_LOCKING_INPUT
+ case TCPIP_MSG_INPKT:
+ LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: PACKET %p\n", (void *)msg));
+#if LWIP_ETHERNET
+ if (msg->msg.inp.netif->flags & (NETIF_FLAG_ETHARP | NETIF_FLAG_ETHERNET)) {
+ ethernet_input(msg->msg.inp.p, msg->msg.inp.netif);
+ } else
+#endif /* LWIP_ETHERNET */
+#if LWIP_IPV6
+ if ((*((unsigned char *)(msg->msg.inp.p->payload)) & 0xf0) == 0x60) {
+ ip6_input(msg->msg.inp.p, msg->msg.inp.netif);
+ } else
+#endif /* LWIP_IPV6 */
+ {
+ ip_input(msg->msg.inp.p, msg->msg.inp.netif);
+ }
+ memp_free(MEMP_TCPIP_MSG_INPKT, msg);
+ break;
+#endif /* LWIP_TCPIP_CORE_LOCKING_INPUT */
+
+#if LWIP_NETIF_API
+ case TCPIP_MSG_NETIFAPI:
+ LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: Netif API message %p\n", (void *)msg));
+ msg->msg.netifapimsg->function(&(msg->msg.netifapimsg->msg));
+ break;
+#endif /* LWIP_NETIF_API */
+
+#if LWIP_TCPIP_TIMEOUT
+ case TCPIP_MSG_TIMEOUT:
+ LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: TIMEOUT %p\n", (void *)msg));
+ sys_timeout(msg->msg.tmo.msecs, msg->msg.tmo.h, msg->msg.tmo.arg);
+ memp_free(MEMP_TCPIP_MSG_API, msg);
+ break;
+ case TCPIP_MSG_UNTIMEOUT:
+ LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: UNTIMEOUT %p\n", (void *)msg));
+ sys_untimeout(msg->msg.tmo.h, msg->msg.tmo.arg);
+ memp_free(MEMP_TCPIP_MSG_API, msg);
+ break;
+#endif /* LWIP_TCPIP_TIMEOUT */
+
+ case TCPIP_MSG_CALLBACK:
+ LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK %p\n", (void *)msg));
+ msg->msg.cb.function(msg->msg.cb.ctx);
+ memp_free(MEMP_TCPIP_MSG_API, msg);
+ break;
+
+ case TCPIP_MSG_CALLBACK_STATIC:
+ LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK_STATIC %p\n", (void *)msg));
+ msg->msg.cb.function(msg->msg.cb.ctx);
+ break;
+
+ case TCPIP_MSG_FINISH:
+ LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: FINISH %p\n", (void*)msg));
+ memp_free(MEMP_TCPIP_MSG_API, msg);
+ finish = 1;
+ break;
+
+ default:
+ LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: invalid message: %d\n", msg->type));
+ LWIP_ASSERT("tcpip_thread: invalid message", 0);
+ break;
+ }
+ }
+
+ if (tcpip_will_finish != NULL) {
+ tcpip_will_finish(tcpip_will_finish_arg);
+ }
+}
+
+/**
+ * Pass a received packet to tcpip_thread for input processing
+ *
+ * @param p the received packet, p->payload pointing to the Ethernet header or
+ * to an IP header (if inp doesn't have NETIF_FLAG_ETHARP or
+ * NETIF_FLAG_ETHERNET flags)
+ * @param inp the network interface on which the packet was received
+ */
+err_t
+tcpip_input(struct pbuf *p, struct netif *inp)
+{
+#if LWIP_TCPIP_CORE_LOCKING_INPUT
+ err_t ret;
+ LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_input: PACKET %p/%p\n", (void *)p, (void *)inp));
+ LOCK_TCPIP_CORE();
+#if LWIP_ETHERNET
+ if (inp->flags & (NETIF_FLAG_ETHARP | NETIF_FLAG_ETHERNET)) {
+ ret = ethernet_input(p, inp);
+ } else
+#endif /* LWIP_ETHERNET */
+ {
+ ret = ip_input(p, inp);
+ }
+ UNLOCK_TCPIP_CORE();
+ return ret;
+#else /* LWIP_TCPIP_CORE_LOCKING_INPUT */
+ struct tcpip_msg *msg;
+
+ if (!sys_mbox_valid(&mbox)) {
+ return ERR_VAL;
+ }
+ msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_INPKT);
+ if (msg == NULL) {
+ return ERR_MEM;
+ }
+
+ msg->type = TCPIP_MSG_INPKT;
+ msg->msg.inp.p = p;
+ msg->msg.inp.netif = inp;
+ if (sys_mbox_trypost(&mbox, msg) != ERR_OK) {
+ memp_free(MEMP_TCPIP_MSG_INPKT, msg);
+ return ERR_MEM;
+ }
+ return ERR_OK;
+#endif /* LWIP_TCPIP_CORE_LOCKING_INPUT */
+}
+
+/**
+ * Call a specific function in the thread context of
+ * tcpip_thread for easy access synchronization.
+ * A function called in that way may access lwIP core code
+ * without fearing concurrent access.
+ *
+ * @param f the function to call
+ * @param ctx parameter passed to f
+ * @param block 1 to block until the request is posted, 0 to non-blocking mode
+ * @return ERR_OK if the function was called, another err_t if not
+ */
+err_t
+tcpip_callback_with_block(tcpip_callback_fn function, void *ctx, u8_t block)
+{
+ struct tcpip_msg *msg;
+
+ if (sys_mbox_valid(&mbox)) {
+ msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API);
+ if (msg == NULL) {
+ return ERR_MEM;
+ }
+
+ msg->type = TCPIP_MSG_CALLBACK;
+ msg->msg.cb.function = function;
+ msg->msg.cb.ctx = ctx;
+ if (block) {
+ sys_mbox_post(&mbox, msg);
+ } else {
+ if (sys_mbox_trypost(&mbox, msg) != ERR_OK) {
+ memp_free(MEMP_TCPIP_MSG_API, msg);
+ return ERR_MEM;
+ }
+ }
+ return ERR_OK;
+ }
+ return ERR_VAL;
+}
+
+#if LWIP_TCPIP_TIMEOUT
+/**
+ * call sys_timeout in tcpip_thread
+ *
+ * @param msec time in milliseconds for timeout
+ * @param h function to be called on timeout
+ * @param arg argument to pass to timeout function h
+ * @return ERR_MEM on memory error, ERR_OK otherwise
+ */
+err_t
+tcpip_timeout(u32_t msecs, sys_timeout_handler h, void *arg)
+{
+ struct tcpip_msg *msg;
+
+ if (sys_mbox_valid(&mbox)) {
+ msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API);
+ if (msg == NULL) {
+ return ERR_MEM;
+ }
+
+ msg->type = TCPIP_MSG_TIMEOUT;
+ msg->msg.tmo.msecs = msecs;
+ msg->msg.tmo.h = h;
+ msg->msg.tmo.arg = arg;
+ sys_mbox_post(&mbox, msg);
+ return ERR_OK;
+ }
+ return ERR_VAL;
+}
+
+/**
+ * call sys_untimeout in tcpip_thread
+ *
+ * @param msec time in milliseconds for timeout
+ * @param h function to be called on timeout
+ * @param arg argument to pass to timeout function h
+ * @return ERR_MEM on memory error, ERR_OK otherwise
+ */
+err_t
+tcpip_untimeout(sys_timeout_handler h, void *arg)
+{
+ struct tcpip_msg *msg;
+
+ if (sys_mbox_valid(&mbox)) {
+ msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API);
+ if (msg == NULL) {
+ return ERR_MEM;
+ }
+
+ msg->type = TCPIP_MSG_UNTIMEOUT;
+ msg->msg.tmo.h = h;
+ msg->msg.tmo.arg = arg;
+ sys_mbox_post(&mbox, msg);
+ return ERR_OK;
+ }
+ return ERR_VAL;
+}
+#endif /* LWIP_TCPIP_TIMEOUT */
+
+#if LWIP_NETCONN
+/**
+ * Call the lower part of a netconn_* function
+ * This function is then running in the thread context
+ * of tcpip_thread and has exclusive access to lwIP core code.
+ *
+ * @param apimsg a struct containing the function to call and its parameters
+ * @return ERR_OK if the function was called, another err_t if not
+ */
+err_t
+tcpip_apimsg(struct api_msg *apimsg)
+{
+ struct tcpip_msg msg;
+#ifdef LWIP_DEBUG
+ /* catch functions that don't set err */
+ apimsg->msg.err = ERR_VAL;
+#endif
+
+ if (sys_mbox_valid(&mbox)) {
+ msg.type = TCPIP_MSG_API;
+ msg.msg.apimsg = apimsg;
+ sys_mbox_post(&mbox, &msg);
+ sys_arch_sem_wait(&apimsg->msg.conn->op_completed, 0);
+ return apimsg->msg.err;
+ }
+ return ERR_VAL;
+}
+
+#endif /* LWIP_NETCONN */
+
+#if LWIP_NETIF_API
+#if !LWIP_TCPIP_CORE_LOCKING
+/**
+ * Much like tcpip_apimsg, but calls the lower part of a netifapi_*
+ * function.
+ *
+ * @param netifapimsg a struct containing the function to call and its parameters
+ * @return error code given back by the function that was called
+ */
+err_t
+tcpip_netifapi(struct netifapi_msg* netifapimsg)
+{
+ struct tcpip_msg msg;
+
+ if (sys_mbox_valid(&mbox)) {
+ err_t err = sys_sem_new(&netifapimsg->msg.sem, 0);
+ if (err != ERR_OK) {
+ netifapimsg->msg.err = err;
+ return err;
+ }
+
+ msg.type = TCPIP_MSG_NETIFAPI;
+ msg.msg.netifapimsg = netifapimsg;
+ sys_mbox_post(&mbox, &msg);
+ sys_sem_wait(&netifapimsg->msg.sem);
+ sys_sem_free(&netifapimsg->msg.sem);
+ return netifapimsg->msg.err;
+ }
+ return ERR_VAL;
+}
+#else /* !LWIP_TCPIP_CORE_LOCKING */
+/**
+ * Call the lower part of a netifapi_* function
+ * This function has exclusive access to lwIP core code by locking it
+ * before the function is called.
+ *
+ * @param netifapimsg a struct containing the function to call and its parameters
+ * @return ERR_OK (only for compatibility fo tcpip_netifapi())
+ */
+err_t
+tcpip_netifapi_lock(struct netifapi_msg* netifapimsg)
+{
+ LOCK_TCPIP_CORE();
+ netifapimsg->function(&(netifapimsg->msg));
+ UNLOCK_TCPIP_CORE();
+ return netifapimsg->msg.err;
+}
+#endif /* !LWIP_TCPIP_CORE_LOCKING */
+#endif /* LWIP_NETIF_API */
+
+/**
+ * Allocate a structure for a static callback message and initialize it.
+ * This is intended to be used to send "static" messages from interrupt context.
+ *
+ * @param function the function to call
+ * @param ctx parameter passed to function
+ * @return a struct pointer to pass to tcpip_trycallback().
+ */
+struct tcpip_callback_msg* tcpip_callbackmsg_new(tcpip_callback_fn function, void *ctx)
+{
+ struct tcpip_msg *msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API);
+ if (msg == NULL) {
+ return NULL;
+ }
+ msg->type = TCPIP_MSG_CALLBACK_STATIC;
+ msg->msg.cb.function = function;
+ msg->msg.cb.ctx = ctx;
+ return (struct tcpip_callback_msg*)msg;
+}
+
+/**
+ * Free a callback message allocated by tcpip_callbackmsg_new().
+ *
+ * @param msg the message to free
+ */
+void tcpip_callbackmsg_delete(struct tcpip_callback_msg* msg)
+{
+ memp_free(MEMP_TCPIP_MSG_API, msg);
+}
+
+/**
+ * Try to post a callback-message to the tcpip_thread mbox
+ * This is intended to be used to send "static" messages from interrupt context.
+ *
+ * @param msg pointer to the message to post
+ * @return sys_mbox_trypost() return code
+ */
+err_t
+tcpip_trycallback(struct tcpip_callback_msg* msg)
+{
+ if (!sys_mbox_valid(&mbox)) {
+ return ERR_VAL;
+ }
+ return sys_mbox_trypost(&mbox, msg);
+}
+
+/**
+ * Initialize this module:
+ * - initialize all sub modules
+ * - start the tcpip_thread
+ *
+ * @param initfunc a function to call when tcpip_thread is running and finished initializing
+ * @param arg argument to pass to initfunc
+ */
+void
+tcpip_init(tcpip_init_done_fn initfunc, void *arg)
+{
+ static struct {
+ void *queue[TCPIP_MBOX_SIZE];
+ u8_t dummy;
+ } sMbox;
+ lwip_init();
+
+ tcpip_init_done = initfunc;
+ tcpip_init_done_arg = arg;
+ if(sys_mbox_new_extra(&sMbox, &mbox, TCPIP_MBOX_SIZE) != ERR_OK) {
+ LWIP_ASSERT("failed to create tcpip_thread mbox", 0);
+ }
+#if LWIP_TCPIP_CORE_LOCKING
+ if(sys_mutex_new(&lock_tcpip_core) != ERR_OK) {
+ LWIP_ASSERT("failed to create lock_tcpip_core", 0);
+ }
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+
+ tcpip_thread_obj = sys_thread_new(TCPIP_THREAD_NAME, tcpip_thread, NULL, TCPIP_THREAD_STACKSIZE, TCPIP_THREAD_PRIO);
+}
+
+/**
+ * Finalize this module:
+ * - initialize all sub modules
+ * - start the tcpip_thread
+ *
+ * @param finish a function to call while tcpip_thread is still running and ready to exit
+ * @param arg argument to pass to finish
+ */
+err_t
+tcpip_finish(tcpip_will_finish_fn finish, void *arg)
+{
+ tcpip_will_finish = finish;
+ tcpip_will_finish_arg = arg;
+
+ if (sys_mbox_valid(&mbox)) {
+ struct tcpip_msg *msg;
+
+ msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API);
+ if (msg == NULL) {
+ return ERR_MEM;
+ }
+
+ msg->type = TCPIP_MSG_FINISH;
+ sys_mbox_post(&mbox, msg);
+
+ return sys_thread_finish(tcpip_thread_obj);
+ }
+
+ return ERR_OK;
+}
+
+/**
+ * Simple callback function used with tcpip_callback to free a pbuf
+ * (pbuf_free has a wrong signature for tcpip_callback)
+ *
+ * @param p The pbuf (chain) to be dereferenced.
+ */
+static void
+pbuf_free_int(void *p)
+{
+ struct pbuf *q = (struct pbuf *)p;
+ pbuf_free(q);
+}
+
+/**
+ * A simple wrapper function that allows you to free a pbuf from interrupt context.
+ *
+ * @param p The pbuf (chain) to be dereferenced.
+ * @return ERR_OK if callback could be enqueued, an err_t if not
+ */
+err_t
+pbuf_free_callback(struct pbuf *p)
+{
+ return tcpip_callback_with_block(pbuf_free_int, p, 0);
+}
+
+/**
+ * A simple wrapper function that allows you to free heap memory from
+ * interrupt context.
+ *
+ * @param m the heap memory to free
+ * @return ERR_OK if callback could be enqueued, an err_t if not
+ */
+err_t
+mem_free_callback(void *m)
+{
+ return tcpip_callback_with_block(mem_free, m, 0);
+}
+
+#endif /* !NO_SYS */
diff --git a/lwip/src/core/def.c b/lwip/src/core/def.c
new file mode 100644
index 0000000..352b552
--- /dev/null
+++ b/lwip/src/core/def.c
@@ -0,0 +1,108 @@
+/**
+ * @file
+ * Common functions used throughout the stack.
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmidt
+ *
+ */
+
+#include "lwip/opt.h"
+#include "lwip/def.h"
+
+/**
+ * These are reference implementations of the byte swapping functions.
+ * Again with the aim of being simple, correct and fully portable.
+ * Byte swapping is the second thing you would want to optimize. You will
+ * need to port it to your architecture and in your cc.h:
+ *
+ * #define LWIP_PLATFORM_BYTESWAP 1
+ * #define LWIP_PLATFORM_HTONS(x) <your_htons>
+ * #define LWIP_PLATFORM_HTONL(x) <your_htonl>
+ *
+ * Note ntohs() and ntohl() are merely references to the htonx counterparts.
+ */
+
+#if (LWIP_PLATFORM_BYTESWAP == 0) && (BYTE_ORDER == LITTLE_ENDIAN)
+
+/**
+ * Convert an u16_t from host- to network byte order.
+ *
+ * @param n u16_t in host byte order
+ * @return n in network byte order
+ */
+u16_t
+lwip_htons(u16_t n)
+{
+ return ((n & 0xff) << 8) | ((n & 0xff00) >> 8);
+}
+
+/**
+ * Convert an u16_t from network- to host byte order.
+ *
+ * @param n u16_t in network byte order
+ * @return n in host byte order
+ */
+u16_t
+lwip_ntohs(u16_t n)
+{
+ return lwip_htons(n);
+}
+
+/**
+ * Convert an u32_t from host- to network byte order.
+ *
+ * @param n u32_t in host byte order
+ * @return n in network byte order
+ */
+u32_t
+lwip_htonl(u32_t n)
+{
+ return ((n & 0xff) << 24) |
+ ((n & 0xff00) << 8) |
+ ((n & 0xff0000UL) >> 8) |
+ ((n & 0xff000000UL) >> 24);
+}
+
+/**
+ * Convert an u32_t from network- to host byte order.
+ *
+ * @param n u32_t in network byte order
+ * @return n in host byte order
+ */
+u32_t
+lwip_ntohl(u32_t n)
+{
+ return lwip_htonl(n);
+}
+
+#endif /* (LWIP_PLATFORM_BYTESWAP == 0) && (BYTE_ORDER == LITTLE_ENDIAN) */
diff --git a/lwip/src/core/dhcp.c b/lwip/src/core/dhcp.c
new file mode 100644
index 0000000..8beecf6
--- /dev/null
+++ b/lwip/src/core/dhcp.c
@@ -0,0 +1,1775 @@
+/**
+ * @file
+ * Dynamic Host Configuration Protocol client
+ *
+ */
+
+/*
+ *
+ * Copyright (c) 2001-2004 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * Copyright (c) 2001-2004 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is a contribution to the lwIP TCP/IP stack.
+ * The Swedish Institute of Computer Science and Adam Dunkels
+ * are specifically granted permission to redistribute this
+ * source code.
+ *
+ * Author: Leon Woestenberg <leon.woestenberg@gmx.net>
+ *
+ * This is a DHCP client for the lwIP TCP/IP stack. It aims to conform
+ * with RFC 2131 and RFC 2132.
+ *
+ * TODO:
+ * - Support for interfaces other than Ethernet (SLIP, PPP, ...)
+ *
+ * Please coordinate changes and requests with Leon Woestenberg
+ * <leon.woestenberg@gmx.net>
+ *
+ * Integration with your code:
+ *
+ * In lwip/dhcp.h
+ * #define DHCP_COARSE_TIMER_SECS (recommended 60 which is a minute)
+ * #define DHCP_FINE_TIMER_MSECS (recommended 500 which equals TCP coarse timer)
+ *
+ * Then have your application call dhcp_coarse_tmr() and
+ * dhcp_fine_tmr() on the defined intervals.
+ *
+ * dhcp_start(struct netif *netif);
+ * starts a DHCP client instance which configures the interface by
+ * obtaining an IP address lease and maintaining it.
+ *
+ * Use dhcp_release(netif) to end the lease and use dhcp_stop(netif)
+ * to remove the DHCP client.
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_DHCP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/stats.h"
+#include "lwip/mem.h"
+#include "lwip/udp.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netif.h"
+#include "lwip/def.h"
+#include "lwip/dhcp.h"
+#include "lwip/autoip.h"
+#include "lwip/dns.h"
+#include "netif/etharp.h"
+
+#include <string.h>
+
+/** DHCP_CREATE_RAND_XID: if this is set to 1, the xid is created using
+ * LWIP_RAND() (this overrides DHCP_GLOBAL_XID)
+ */
+#ifndef DHCP_CREATE_RAND_XID
+#define DHCP_CREATE_RAND_XID 1
+#endif
+
+/** Default for DHCP_GLOBAL_XID is 0xABCD0000
+ * This can be changed by defining DHCP_GLOBAL_XID and DHCP_GLOBAL_XID_HEADER, e.g.
+ * #define DHCP_GLOBAL_XID_HEADER "stdlib.h"
+ * #define DHCP_GLOBAL_XID rand()
+ */
+#ifdef DHCP_GLOBAL_XID_HEADER
+#include DHCP_GLOBAL_XID_HEADER /* include optional starting XID generation prototypes */
+#endif
+
+/** DHCP_OPTION_MAX_MSG_SIZE is set to the MTU
+ * MTU is checked to be big enough in dhcp_start */
+#define DHCP_MAX_MSG_LEN(netif) (netif->mtu)
+#define DHCP_MAX_MSG_LEN_MIN_REQUIRED 576
+/** Minimum length for reply before packet is parsed */
+#define DHCP_MIN_REPLY_LEN 44
+
+#define REBOOT_TRIES 2
+
+/** Option handling: options are parsed in dhcp_parse_reply
+ * and saved in an array where other functions can load them from.
+ * This might be moved into the struct dhcp (not necessarily since
+ * lwIP is single-threaded and the array is only used while in recv
+ * callback). */
+#define DHCP_OPTION_IDX_OVERLOAD 0
+#define DHCP_OPTION_IDX_MSG_TYPE 1
+#define DHCP_OPTION_IDX_SERVER_ID 2
+#define DHCP_OPTION_IDX_LEASE_TIME 3
+#define DHCP_OPTION_IDX_T1 4
+#define DHCP_OPTION_IDX_T2 5
+#define DHCP_OPTION_IDX_SUBNET_MASK 6
+#define DHCP_OPTION_IDX_ROUTER 7
+#define DHCP_OPTION_IDX_DNS_SERVER 8
+#define DHCP_OPTION_IDX_MAX (DHCP_OPTION_IDX_DNS_SERVER + DNS_MAX_SERVERS)
+
+/** Holds the decoded option values, only valid while in dhcp_recv.
+ @todo: move this into struct dhcp? */
+u32_t dhcp_rx_options_val[DHCP_OPTION_IDX_MAX];
+/** Holds a flag which option was received and is contained in dhcp_rx_options_val,
+ only valid while in dhcp_recv.
+ @todo: move this into struct dhcp? */
+u8_t dhcp_rx_options_given[DHCP_OPTION_IDX_MAX];
+
+#ifdef DHCP_GLOBAL_XID
+static u32_t xid;
+static u8_t xid_initialised;
+#endif /* DHCP_GLOBAL_XID */
+
+#define dhcp_option_given(dhcp, idx) (dhcp_rx_options_given[idx] != 0)
+#define dhcp_got_option(dhcp, idx) (dhcp_rx_options_given[idx] = 1)
+#define dhcp_clear_option(dhcp, idx) (dhcp_rx_options_given[idx] = 0)
+#define dhcp_clear_all_options(dhcp) (memset(dhcp_rx_options_given, 0, sizeof(dhcp_rx_options_given)))
+#define dhcp_get_option_value(dhcp, idx) (dhcp_rx_options_val[idx])
+#define dhcp_set_option_value(dhcp, idx, val) (dhcp_rx_options_val[idx] = (val))
+
+
+/* DHCP client state machine functions */
+static err_t dhcp_discover(struct netif *netif);
+static err_t dhcp_select(struct netif *netif);
+static void dhcp_bind(struct netif *netif);
+#if DHCP_DOES_ARP_CHECK
+static err_t dhcp_decline(struct netif *netif);
+#endif /* DHCP_DOES_ARP_CHECK */
+static err_t dhcp_rebind(struct netif *netif);
+static err_t dhcp_reboot(struct netif *netif);
+static void dhcp_set_state(struct dhcp *dhcp, u8_t new_state);
+
+/* receive, unfold, parse and free incoming messages */
+static void dhcp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, ip_addr_t *addr, u16_t port);
+
+/* set the DHCP timers */
+static void dhcp_timeout(struct netif *netif);
+static void dhcp_t1_timeout(struct netif *netif);
+static void dhcp_t2_timeout(struct netif *netif);
+
+/* build outgoing messages */
+/* create a DHCP message, fill in common headers */
+static err_t dhcp_create_msg(struct netif *netif, struct dhcp *dhcp, u8_t message_type);
+/* free a DHCP request */
+static void dhcp_delete_msg(struct dhcp *dhcp);
+/* add a DHCP option (type, then length in bytes) */
+static void dhcp_option(struct dhcp *dhcp, u8_t option_type, u8_t option_len);
+/* add option values */
+static void dhcp_option_byte(struct dhcp *dhcp, u8_t value);
+static void dhcp_option_short(struct dhcp *dhcp, u16_t value);
+static void dhcp_option_long(struct dhcp *dhcp, u32_t value);
+#if LWIP_NETIF_HOSTNAME
+static void dhcp_option_hostname(struct dhcp *dhcp, struct netif *netif);
+#endif /* LWIP_NETIF_HOSTNAME */
+/* always add the DHCP options trailer to end and pad */
+static void dhcp_option_trailer(struct dhcp *dhcp);
+
+/**
+ * Back-off the DHCP client (because of a received NAK response).
+ *
+ * Back-off the DHCP client because of a received NAK. Receiving a
+ * NAK means the client asked for something non-sensible, for
+ * example when it tries to renew a lease obtained on another network.
+ *
+ * We clear any existing set IP address and restart DHCP negotiation
+ * afresh (as per RFC2131 3.2.3).
+ *
+ * @param netif the netif under DHCP control
+ */
+static void
+dhcp_handle_nak(struct netif *netif)
+{
+ struct dhcp *dhcp = netif->dhcp;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_handle_nak(netif=%p) %c%c%"U16_F"\n",
+ (void*)netif, netif->name[0], netif->name[1], (u16_t)netif->num));
+ /* Set the interface down since the address must no longer be used, as per RFC2131 */
+ netif_set_down(netif);
+ /* remove IP address from interface */
+ netif_set_ipaddr(netif, IP_ADDR_ANY);
+ netif_set_gw(netif, IP_ADDR_ANY);
+ netif_set_netmask(netif, IP_ADDR_ANY);
+ /* Change to a defined state */
+ dhcp_set_state(dhcp, DHCP_BACKING_OFF);
+ /* We can immediately restart discovery */
+ dhcp_discover(netif);
+}
+
+#if DHCP_DOES_ARP_CHECK
+/**
+ * Checks if the offered IP address is already in use.
+ *
+ * It does so by sending an ARP request for the offered address and
+ * entering CHECKING state. If no ARP reply is received within a small
+ * interval, the address is assumed to be free for use by us.
+ *
+ * @param netif the netif under DHCP control
+ */
+static void
+dhcp_check(struct netif *netif)
+{
+ struct dhcp *dhcp = netif->dhcp;
+ err_t result;
+ u16_t msecs;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_check(netif=%p) %c%c\n", (void *)netif, (s16_t)netif->name[0],
+ (s16_t)netif->name[1]));
+ dhcp_set_state(dhcp, DHCP_CHECKING);
+ /* create an ARP query for the offered IP address, expecting that no host
+ responds, as the IP address should not be in use. */
+ result = etharp_query(netif, &dhcp->offered_ip_addr, NULL);
+ if (result != ERR_OK) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, ("dhcp_check: could not perform ARP query\n"));
+ }
+ dhcp->tries++;
+ msecs = 500;
+ dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_check(): set request timeout %"U16_F" msecs\n", msecs));
+}
+#endif /* DHCP_DOES_ARP_CHECK */
+
+/**
+ * Remember the configuration offered by a DHCP server.
+ *
+ * @param netif the netif under DHCP control
+ */
+static void
+dhcp_handle_offer(struct netif *netif)
+{
+ struct dhcp *dhcp = netif->dhcp;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_handle_offer(netif=%p) %c%c%"U16_F"\n",
+ (void*)netif, netif->name[0], netif->name[1], (u16_t)netif->num));
+ /* obtain the server address */
+ if (dhcp_option_given(dhcp, DHCP_OPTION_IDX_SERVER_ID)) {
+ ip4_addr_set_u32(&dhcp->server_ip_addr, htonl(dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_SERVER_ID)));
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_handle_offer(): server 0x%08"X32_F"\n",
+ ip4_addr_get_u32(&dhcp->server_ip_addr)));
+ /* remember offered address */
+ ip_addr_copy(dhcp->offered_ip_addr, dhcp->msg_in->yiaddr);
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_handle_offer(): offer for 0x%08"X32_F"\n",
+ ip4_addr_get_u32(&dhcp->offered_ip_addr)));
+
+ dhcp_select(netif);
+ } else {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS,
+ ("dhcp_handle_offer(netif=%p) did not get server ID!\n", (void*)netif));
+ }
+}
+
+/**
+ * Select a DHCP server offer out of all offers.
+ *
+ * Simply select the first offer received.
+ *
+ * @param netif the netif under DHCP control
+ * @return lwIP specific error (see error.h)
+ */
+static err_t
+dhcp_select(struct netif *netif)
+{
+ struct dhcp *dhcp = netif->dhcp;
+ err_t result;
+ u16_t msecs;
+
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_select(netif=%p) %c%c%"U16_F"\n", (void*)netif, netif->name[0], netif->name[1], (u16_t)netif->num));
+ dhcp_set_state(dhcp, DHCP_REQUESTING);
+
+ /* create and initialize the DHCP message header */
+ result = dhcp_create_msg(netif, dhcp, DHCP_REQUEST);
+ if (result == ERR_OK) {
+ dhcp_option(dhcp, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN);
+ dhcp_option_short(dhcp, DHCP_MAX_MSG_LEN(netif));
+
+ /* MUST request the offered IP address */
+ dhcp_option(dhcp, DHCP_OPTION_REQUESTED_IP, 4);
+ dhcp_option_long(dhcp, ntohl(ip4_addr_get_u32(&dhcp->offered_ip_addr)));
+
+ dhcp_option(dhcp, DHCP_OPTION_SERVER_ID, 4);
+ dhcp_option_long(dhcp, ntohl(ip4_addr_get_u32(&dhcp->server_ip_addr)));
+
+ dhcp_option(dhcp, DHCP_OPTION_PARAMETER_REQUEST_LIST, 4/*num options*/);
+ dhcp_option_byte(dhcp, DHCP_OPTION_SUBNET_MASK);
+ dhcp_option_byte(dhcp, DHCP_OPTION_ROUTER);
+ dhcp_option_byte(dhcp, DHCP_OPTION_BROADCAST);
+ dhcp_option_byte(dhcp, DHCP_OPTION_DNS_SERVER);
+
+#if LWIP_NETIF_HOSTNAME
+ dhcp_option_hostname(dhcp, netif);
+#endif /* LWIP_NETIF_HOSTNAME */
+
+ dhcp_option_trailer(dhcp);
+ /* shrink the pbuf to the actual content length */
+ pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len);
+
+ /* send broadcast to any DHCP server */
+ udp_sendto_if(dhcp->pcb, dhcp->p_out, IP_ADDR_BROADCAST, DHCP_SERVER_PORT, netif);
+ dhcp_delete_msg(dhcp);
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_select: REQUESTING\n"));
+ } else {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, ("dhcp_select: could not allocate DHCP request\n"));
+ }
+ dhcp->tries++;
+ msecs = (dhcp->tries < 6 ? 1 << dhcp->tries : 60) * 1000;
+ dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_select(): set request timeout %"U16_F" msecs\n", msecs));
+ return result;
+}
+
+/**
+ * The DHCP timer that checks for lease renewal/rebind timeouts.
+ */
+void
+dhcp_coarse_tmr()
+{
+ struct netif *netif = netif_list;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_coarse_tmr()\n"));
+ /* iterate through all network interfaces */
+ while (netif != NULL) {
+ /* only act on DHCP configured interfaces */
+ if (netif->dhcp != NULL) {
+ /* timer is active (non zero), and triggers (zeroes) now? */
+ if (netif->dhcp->t2_timeout-- == 1) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_coarse_tmr(): t2 timeout\n"));
+ /* this clients' rebind timeout triggered */
+ dhcp_t2_timeout(netif);
+ /* timer is active (non zero), and triggers (zeroes) now */
+ } else if (netif->dhcp->t1_timeout-- == 1) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_coarse_tmr(): t1 timeout\n"));
+ /* this clients' renewal timeout triggered */
+ dhcp_t1_timeout(netif);
+ }
+ }
+ /* proceed to next netif */
+ netif = netif->next;
+ }
+}
+
+/**
+ * DHCP transaction timeout handling
+ *
+ * A DHCP server is expected to respond within a short period of time.
+ * This timer checks whether an outstanding DHCP request is timed out.
+ */
+void
+dhcp_fine_tmr()
+{
+ struct netif *netif = netif_list;
+ /* loop through netif's */
+ while (netif != NULL) {
+ /* only act on DHCP configured interfaces */
+ if (netif->dhcp != NULL) {
+ /* timer is active (non zero), and is about to trigger now */
+ if (netif->dhcp->request_timeout > 1) {
+ netif->dhcp->request_timeout--;
+ }
+ else if (netif->dhcp->request_timeout == 1) {
+ netif->dhcp->request_timeout--;
+ /* { netif->dhcp->request_timeout == 0 } */
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_fine_tmr(): request timeout\n"));
+ /* this client's request timeout triggered */
+ dhcp_timeout(netif);
+ }
+ }
+ /* proceed to next network interface */
+ netif = netif->next;
+ }
+}
+
+/**
+ * A DHCP negotiation transaction, or ARP request, has timed out.
+ *
+ * The timer that was started with the DHCP or ARP request has
+ * timed out, indicating no response was received in time.
+ *
+ * @param netif the netif under DHCP control
+ */
+static void
+dhcp_timeout(struct netif *netif)
+{
+ struct dhcp *dhcp = netif->dhcp;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_timeout()\n"));
+ /* back-off period has passed, or server selection timed out */
+ if ((dhcp->state == DHCP_BACKING_OFF) || (dhcp->state == DHCP_SELECTING)) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_timeout(): restarting discovery\n"));
+ dhcp_discover(netif);
+ /* receiving the requested lease timed out */
+ } else if (dhcp->state == DHCP_REQUESTING) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_timeout(): REQUESTING, DHCP request timed out\n"));
+ if (dhcp->tries <= 5) {
+ dhcp_select(netif);
+ } else {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_timeout(): REQUESTING, releasing, restarting\n"));
+ dhcp_release(netif);
+ dhcp_discover(netif);
+ }
+#if DHCP_DOES_ARP_CHECK
+ /* received no ARP reply for the offered address (which is good) */
+ } else if (dhcp->state == DHCP_CHECKING) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_timeout(): CHECKING, ARP request timed out\n"));
+ if (dhcp->tries <= 1) {
+ dhcp_check(netif);
+ /* no ARP replies on the offered address,
+ looks like the IP address is indeed free */
+ } else {
+ /* bind the interface to the offered address */
+ dhcp_bind(netif);
+ }
+#endif /* DHCP_DOES_ARP_CHECK */
+ }
+ /* did not get response to renew request? */
+ else if (dhcp->state == DHCP_RENEWING) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_timeout(): RENEWING, DHCP request timed out\n"));
+ /* just retry renewal */
+ /* note that the rebind timer will eventually time-out if renew does not work */
+ dhcp_renew(netif);
+ /* did not get response to rebind request? */
+ } else if (dhcp->state == DHCP_REBINDING) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_timeout(): REBINDING, DHCP request timed out\n"));
+ if (dhcp->tries <= 8) {
+ dhcp_rebind(netif);
+ } else {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_timeout(): RELEASING, DISCOVERING\n"));
+ dhcp_release(netif);
+ dhcp_discover(netif);
+ }
+ } else if (dhcp->state == DHCP_REBOOTING) {
+ if (dhcp->tries < REBOOT_TRIES) {
+ dhcp_reboot(netif);
+ } else {
+ dhcp_discover(netif);
+ }
+ }
+}
+
+/**
+ * The renewal period has timed out.
+ *
+ * @param netif the netif under DHCP control
+ */
+static void
+dhcp_t1_timeout(struct netif *netif)
+{
+ struct dhcp *dhcp = netif->dhcp;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_t1_timeout()\n"));
+ if ((dhcp->state == DHCP_REQUESTING) || (dhcp->state == DHCP_BOUND) ||
+ (dhcp->state == DHCP_RENEWING)) {
+ /* just retry to renew - note that the rebind timer (t2) will
+ * eventually time-out if renew tries fail. */
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
+ ("dhcp_t1_timeout(): must renew\n"));
+ /* This slightly different to RFC2131: DHCPREQUEST will be sent from state
+ DHCP_RENEWING, not DHCP_BOUND */
+ dhcp_renew(netif);
+ }
+}
+
+/**
+ * The rebind period has timed out.
+ *
+ * @param netif the netif under DHCP control
+ */
+static void
+dhcp_t2_timeout(struct netif *netif)
+{
+ struct dhcp *dhcp = netif->dhcp;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_t2_timeout()\n"));
+ if ((dhcp->state == DHCP_REQUESTING) || (dhcp->state == DHCP_BOUND) ||
+ (dhcp->state == DHCP_RENEWING)) {
+ /* just retry to rebind */
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
+ ("dhcp_t2_timeout(): must rebind\n"));
+ /* This slightly different to RFC2131: DHCPREQUEST will be sent from state
+ DHCP_REBINDING, not DHCP_BOUND */
+ dhcp_rebind(netif);
+ }
+}
+
+/**
+ * Handle a DHCP ACK packet
+ *
+ * @param netif the netif under DHCP control
+ */
+static void
+dhcp_handle_ack(struct netif *netif)
+{
+ struct dhcp *dhcp = netif->dhcp;
+#if LWIP_DNS
+ u8_t n;
+#endif /* LWIP_DNS */
+
+ /* clear options we might not get from the ACK */
+ ip_addr_set_zero(&dhcp->offered_sn_mask);
+ ip_addr_set_zero(&dhcp->offered_gw_addr);
+#if LWIP_DHCP_BOOTP_FILE
+ ip_addr_set_zero(&dhcp->offered_si_addr);
+#endif /* LWIP_DHCP_BOOTP_FILE */
+
+ /* lease time given? */
+ if (dhcp_option_given(dhcp, DHCP_OPTION_IDX_LEASE_TIME)) {
+ /* remember offered lease time */
+ dhcp->offered_t0_lease = dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_LEASE_TIME);
+ }
+ /* renewal period given? */
+ if (dhcp_option_given(dhcp, DHCP_OPTION_IDX_T1)) {
+ /* remember given renewal period */
+ dhcp->offered_t1_renew = dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_T1);
+ } else {
+ /* calculate safe periods for renewal */
+ dhcp->offered_t1_renew = dhcp->offered_t0_lease / 2;
+ }
+
+ /* renewal period given? */
+ if (dhcp_option_given(dhcp, DHCP_OPTION_IDX_T2)) {
+ /* remember given rebind period */
+ dhcp->offered_t2_rebind = dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_T2);
+ } else {
+ /* calculate safe periods for rebinding */
+ dhcp->offered_t2_rebind = dhcp->offered_t0_lease;
+ }
+
+ /* (y)our internet address */
+ ip_addr_copy(dhcp->offered_ip_addr, dhcp->msg_in->yiaddr);
+
+#if LWIP_DHCP_BOOTP_FILE
+ /* copy boot server address,
+ boot file name copied in dhcp_parse_reply if not overloaded */
+ ip_addr_copy(dhcp->offered_si_addr, dhcp->msg_in->siaddr);
+#endif /* LWIP_DHCP_BOOTP_FILE */
+
+ /* subnet mask given? */
+ if (dhcp_option_given(dhcp, DHCP_OPTION_IDX_SUBNET_MASK)) {
+ /* remember given subnet mask */
+ ip4_addr_set_u32(&dhcp->offered_sn_mask, htonl(dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_SUBNET_MASK)));
+ dhcp->subnet_mask_given = 1;
+ } else {
+ dhcp->subnet_mask_given = 0;
+ }
+
+ /* gateway router */
+ if (dhcp_option_given(dhcp, DHCP_OPTION_IDX_ROUTER)) {
+ ip4_addr_set_u32(&dhcp->offered_gw_addr, htonl(dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_ROUTER)));
+ }
+
+#if LWIP_DNS
+ /* DNS servers */
+ for(n = 0; (n < DNS_MAX_SERVERS) && dhcp_option_given(dhcp, DHCP_OPTION_IDX_DNS_SERVER + n); n++) {
+ ip_addr_t dns_addr;
+ ip4_addr_set_u32(&dns_addr, htonl(dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_DNS_SERVER + n)));
+ dns_setserver(n, &dns_addr);
+ }
+#endif /* LWIP_DNS */
+}
+
+/** Set a statically allocated struct dhcp to work with.
+ * Using this prevents dhcp_start to allocate it using mem_malloc.
+ *
+ * @param netif the netif for which to set the struct dhcp
+ * @param dhcp (uninitialised) dhcp struct allocated by the application
+ */
+void
+dhcp_set_struct(struct netif *netif, struct dhcp *dhcp)
+{
+ LWIP_ASSERT("netif != NULL", netif != NULL);
+ LWIP_ASSERT("dhcp != NULL", dhcp != NULL);
+ LWIP_ASSERT("netif already has a struct dhcp set", netif->dhcp == NULL);
+
+ /* clear data structure */
+ memset(dhcp, 0, sizeof(struct dhcp));
+ /* dhcp_set_state(&dhcp, DHCP_OFF); */
+ netif->dhcp = dhcp;
+}
+
+/** Removes a struct dhcp from a netif.
+ *
+ * ATTENTION: Only use this when not using dhcp_set_struct() to allocate the
+ * struct dhcp since the memory is passed back to the heap.
+ *
+ * @param netif the netif from which to remove the struct dhcp
+ */
+void dhcp_cleanup(struct netif *netif)
+{
+ LWIP_ASSERT("netif != NULL", netif != NULL);
+
+ if (netif->dhcp != NULL) {
+ mem_free(netif->dhcp);
+ netif->dhcp = NULL;
+ }
+}
+
+/**
+ * Start DHCP negotiation for a network interface.
+ *
+ * If no DHCP client instance was attached to this interface,
+ * a new client is created first. If a DHCP client instance
+ * was already present, it restarts negotiation.
+ *
+ * @param netif The lwIP network interface
+ * @return lwIP error code
+ * - ERR_OK - No error
+ * - ERR_MEM - Out of memory
+ */
+err_t
+dhcp_start(struct netif *netif)
+{
+ struct dhcp *dhcp;
+ err_t result = ERR_OK;
+
+ LWIP_ERROR("netif != NULL", (netif != NULL), return ERR_ARG;);
+ dhcp = netif->dhcp;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_start(netif=%p) %c%c%"U16_F"\n", (void*)netif, netif->name[0], netif->name[1], (u16_t)netif->num));
+ /* Remove the flag that says this netif is handled by DHCP,
+ it is set when we succeeded starting. */
+ netif->flags &= ~NETIF_FLAG_DHCP;
+
+ /* check hwtype of the netif */
+ if ((netif->flags & NETIF_FLAG_ETHARP) == 0) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): No ETHARP netif\n"));
+ return ERR_ARG;
+ }
+
+ /* check MTU of the netif */
+ if (netif->mtu < DHCP_MAX_MSG_LEN_MIN_REQUIRED) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): Cannot use this netif with DHCP: MTU is too small\n"));
+ return ERR_MEM;
+ }
+
+ /* no DHCP client attached yet? */
+ if (dhcp == NULL) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): starting new DHCP client\n"));
+ dhcp = (struct dhcp *)mem_malloc(sizeof(struct dhcp));
+ if (dhcp == NULL) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): could not allocate dhcp\n"));
+ return ERR_MEM;
+ }
+ /* store this dhcp client in the netif */
+ netif->dhcp = dhcp;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): allocated dhcp"));
+ /* already has DHCP client attached */
+ } else {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_start(): restarting DHCP configuration\n"));
+ if (dhcp->pcb != NULL) {
+ udp_remove(dhcp->pcb);
+ }
+ LWIP_ASSERT("pbuf p_out wasn't freed", dhcp->p_out == NULL);
+ LWIP_ASSERT("reply wasn't freed", dhcp->msg_in == NULL );
+ }
+
+ /* clear data structure */
+ memset(dhcp, 0, sizeof(struct dhcp));
+ /* dhcp_set_state(&dhcp, DHCP_OFF); */
+ /* allocate UDP PCB */
+ dhcp->pcb = udp_new();
+ if (dhcp->pcb == NULL) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): could not obtain pcb\n"));
+ return ERR_MEM;
+ }
+ ip_set_option(dhcp->pcb, SOF_BROADCAST);
+ /* set up local and remote port for the pcb */
+ udp_bind(dhcp->pcb, IP_ADDR_ANY, DHCP_CLIENT_PORT);
+ udp_connect(dhcp->pcb, IP_ADDR_ANY, DHCP_SERVER_PORT);
+ /* set up the recv callback and argument */
+ udp_recv(dhcp->pcb, dhcp_recv, netif);
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): starting DHCP configuration\n"));
+ /* (re)start the DHCP negotiation */
+ result = dhcp_discover(netif);
+ if (result != ERR_OK) {
+ /* free resources allocated above */
+ dhcp_stop(netif);
+ return ERR_MEM;
+ }
+ /* Set the flag that says this netif is handled by DHCP. */
+ netif->flags |= NETIF_FLAG_DHCP;
+ return result;
+}
+
+/**
+ * Inform a DHCP server of our manual configuration.
+ *
+ * This informs DHCP servers of our fixed IP address configuration
+ * by sending an INFORM message. It does not involve DHCP address
+ * configuration, it is just here to be nice to the network.
+ *
+ * @param netif The lwIP network interface
+ */
+void
+dhcp_inform(struct netif *netif)
+{
+ struct dhcp dhcp;
+ err_t result = ERR_OK;
+ struct udp_pcb *pcb;
+
+ LWIP_ERROR("netif != NULL", (netif != NULL), return;);
+
+ memset(&dhcp, 0, sizeof(struct dhcp));
+ dhcp_set_state(&dhcp, DHCP_INFORM);
+
+ if ((netif->dhcp != NULL) && (netif->dhcp->pcb != NULL)) {
+ /* re-use existing pcb */
+ pcb = netif->dhcp->pcb;
+ } else {
+ pcb = udp_new();
+ if (pcb == NULL) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("dhcp_inform(): could not obtain pcb"));
+ return;
+ }
+ dhcp.pcb = pcb;
+ ip_set_option(dhcp.pcb, SOF_BROADCAST);
+ udp_bind(dhcp.pcb, IP_ADDR_ANY, DHCP_CLIENT_PORT);
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_inform(): created new udp pcb\n"));
+ }
+ /* create and initialize the DHCP message header */
+ result = dhcp_create_msg(netif, &dhcp, DHCP_INFORM);
+ if (result == ERR_OK) {
+ dhcp_option(&dhcp, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN);
+ dhcp_option_short(&dhcp, DHCP_MAX_MSG_LEN(netif));
+
+ dhcp_option_trailer(&dhcp);
+
+ pbuf_realloc(dhcp.p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp.options_out_len);
+
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_inform: INFORMING\n"));
+ udp_sendto_if(pcb, dhcp.p_out, IP_ADDR_BROADCAST, DHCP_SERVER_PORT, netif);
+ dhcp_delete_msg(&dhcp);
+ } else {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("dhcp_inform: could not allocate DHCP request\n"));
+ }
+
+ if (dhcp.pcb != NULL) {
+ /* otherwise, the existing pcb was used */
+ udp_remove(dhcp.pcb);
+ }
+}
+
+/** Handle a possible change in the network configuration.
+ *
+ * This enters the REBOOTING state to verify that the currently bound
+ * address is still valid.
+ */
+void
+dhcp_network_changed(struct netif *netif)
+{
+ struct dhcp *dhcp = netif->dhcp;
+ if (!dhcp)
+ return;
+ switch (dhcp->state) {
+ case DHCP_REBINDING:
+ case DHCP_RENEWING:
+ case DHCP_BOUND:
+ case DHCP_REBOOTING:
+ netif_set_down(netif);
+ dhcp->tries = 0;
+ dhcp_reboot(netif);
+ break;
+ case DHCP_OFF:
+ /* stay off */
+ break;
+ default:
+ dhcp->tries = 0;
+#if LWIP_DHCP_AUTOIP_COOP
+ if(dhcp->autoip_coop_state == DHCP_AUTOIP_COOP_STATE_ON) {
+ autoip_stop(netif);
+ dhcp->autoip_coop_state = DHCP_AUTOIP_COOP_STATE_OFF;
+ }
+#endif /* LWIP_DHCP_AUTOIP_COOP */
+ dhcp_discover(netif);
+ break;
+ }
+}
+
+#if DHCP_DOES_ARP_CHECK
+/**
+ * Match an ARP reply with the offered IP address.
+ *
+ * @param netif the network interface on which the reply was received
+ * @param addr The IP address we received a reply from
+ */
+void dhcp_arp_reply(struct netif *netif, ip_addr_t *addr)
+{
+ LWIP_ERROR("netif != NULL", (netif != NULL), return;);
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_arp_reply()\n"));
+ /* is a DHCP client doing an ARP check? */
+ if ((netif->dhcp != NULL) && (netif->dhcp->state == DHCP_CHECKING)) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_arp_reply(): CHECKING, arp reply for 0x%08"X32_F"\n",
+ ip4_addr_get_u32(addr)));
+ /* did a host respond with the address we
+ were offered by the DHCP server? */
+ if (ip_addr_cmp(addr, &netif->dhcp->offered_ip_addr)) {
+ /* we will not accept the offered address */
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | LWIP_DBG_LEVEL_WARNING,
+ ("dhcp_arp_reply(): arp reply matched with offered address, declining\n"));
+ dhcp_decline(netif);
+ }
+ }
+}
+
+/**
+ * Decline an offered lease.
+ *
+ * Tell the DHCP server we do not accept the offered address.
+ * One reason to decline the lease is when we find out the address
+ * is already in use by another host (through ARP).
+ *
+ * @param netif the netif under DHCP control
+ */
+static err_t
+dhcp_decline(struct netif *netif)
+{
+ struct dhcp *dhcp = netif->dhcp;
+ err_t result = ERR_OK;
+ u16_t msecs;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_decline()\n"));
+ dhcp_set_state(dhcp, DHCP_BACKING_OFF);
+ /* create and initialize the DHCP message header */
+ result = dhcp_create_msg(netif, dhcp, DHCP_DECLINE);
+ if (result == ERR_OK) {
+ dhcp_option(dhcp, DHCP_OPTION_REQUESTED_IP, 4);
+ dhcp_option_long(dhcp, ntohl(ip4_addr_get_u32(&dhcp->offered_ip_addr)));
+
+ dhcp_option_trailer(dhcp);
+ /* resize pbuf to reflect true size of options */
+ pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len);
+
+ /* per section 4.4.4, broadcast DECLINE messages */
+ udp_sendto_if(dhcp->pcb, dhcp->p_out, IP_ADDR_BROADCAST, DHCP_SERVER_PORT, netif);
+ dhcp_delete_msg(dhcp);
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_decline: BACKING OFF\n"));
+ } else {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS,
+ ("dhcp_decline: could not allocate DHCP request\n"));
+ }
+ dhcp->tries++;
+ msecs = 10*1000;
+ dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_decline(): set request timeout %"U16_F" msecs\n", msecs));
+ return result;
+}
+#endif /* DHCP_DOES_ARP_CHECK */
+
+
+/**
+ * Start the DHCP process, discover a DHCP server.
+ *
+ * @param netif the netif under DHCP control
+ */
+static err_t
+dhcp_discover(struct netif *netif)
+{
+ struct dhcp *dhcp = netif->dhcp;
+ err_t result = ERR_OK;
+ u16_t msecs;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_discover()\n"));
+ ip_addr_set_any(&dhcp->offered_ip_addr);
+ dhcp_set_state(dhcp, DHCP_SELECTING);
+ /* create and initialize the DHCP message header */
+ result = dhcp_create_msg(netif, dhcp, DHCP_DISCOVER);
+ if (result == ERR_OK) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_discover: making request\n"));
+
+ dhcp_option(dhcp, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN);
+ dhcp_option_short(dhcp, DHCP_MAX_MSG_LEN(netif));
+
+ dhcp_option(dhcp, DHCP_OPTION_PARAMETER_REQUEST_LIST, 4/*num options*/);
+ dhcp_option_byte(dhcp, DHCP_OPTION_SUBNET_MASK);
+ dhcp_option_byte(dhcp, DHCP_OPTION_ROUTER);
+ dhcp_option_byte(dhcp, DHCP_OPTION_BROADCAST);
+ dhcp_option_byte(dhcp, DHCP_OPTION_DNS_SERVER);
+
+ dhcp_option_trailer(dhcp);
+
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_discover: realloc()ing\n"));
+ pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len);
+
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_discover: sendto(DISCOVER, IP_ADDR_BROADCAST, DHCP_SERVER_PORT)\n"));
+ udp_sendto_if(dhcp->pcb, dhcp->p_out, IP_ADDR_BROADCAST, DHCP_SERVER_PORT, netif);
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_discover: deleting()ing\n"));
+ dhcp_delete_msg(dhcp);
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_discover: SELECTING\n"));
+ } else {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("dhcp_discover: could not allocate DHCP request\n"));
+ }
+ dhcp->tries++;
+#if LWIP_DHCP_AUTOIP_COOP
+ if(dhcp->tries >= LWIP_DHCP_AUTOIP_COOP_TRIES && dhcp->autoip_coop_state == DHCP_AUTOIP_COOP_STATE_OFF) {
+ dhcp->autoip_coop_state = DHCP_AUTOIP_COOP_STATE_ON;
+ autoip_start(netif);
+ }
+#endif /* LWIP_DHCP_AUTOIP_COOP */
+ msecs = (dhcp->tries < 6 ? 1 << dhcp->tries : 60) * 1000;
+ dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_discover(): set request timeout %"U16_F" msecs\n", msecs));
+ return result;
+}
+
+
+/**
+ * Bind the interface to the offered IP address.
+ *
+ * @param netif network interface to bind to the offered address
+ */
+static void
+dhcp_bind(struct netif *netif)
+{
+ u32_t timeout;
+ struct dhcp *dhcp;
+ ip_addr_t sn_mask, gw_addr;
+ LWIP_ERROR("dhcp_bind: netif != NULL", (netif != NULL), return;);
+ dhcp = netif->dhcp;
+ LWIP_ERROR("dhcp_bind: dhcp != NULL", (dhcp != NULL), return;);
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_bind(netif=%p) %c%c%"U16_F"\n", (void*)netif, netif->name[0], netif->name[1], (u16_t)netif->num));
+
+ /* temporary DHCP lease? */
+ if (dhcp->offered_t1_renew != 0xffffffffUL) {
+ /* set renewal period timer */
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_bind(): t1 renewal timer %"U32_F" secs\n", dhcp->offered_t1_renew));
+ timeout = (dhcp->offered_t1_renew + DHCP_COARSE_TIMER_SECS / 2) / DHCP_COARSE_TIMER_SECS;
+ if(timeout > 0xffff) {
+ timeout = 0xffff;
+ }
+ dhcp->t1_timeout = (u16_t)timeout;
+ if (dhcp->t1_timeout == 0) {
+ dhcp->t1_timeout = 1;
+ }
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_bind(): set request timeout %"U32_F" msecs\n", dhcp->offered_t1_renew*1000));
+ }
+ /* set renewal period timer */
+ if (dhcp->offered_t2_rebind != 0xffffffffUL) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_bind(): t2 rebind timer %"U32_F" secs\n", dhcp->offered_t2_rebind));
+ timeout = (dhcp->offered_t2_rebind + DHCP_COARSE_TIMER_SECS / 2) / DHCP_COARSE_TIMER_SECS;
+ if(timeout > 0xffff) {
+ timeout = 0xffff;
+ }
+ dhcp->t2_timeout = (u16_t)timeout;
+ if (dhcp->t2_timeout == 0) {
+ dhcp->t2_timeout = 1;
+ }
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_bind(): set request timeout %"U32_F" msecs\n", dhcp->offered_t2_rebind*1000));
+ }
+
+ /* If we have sub 1 minute lease, t2 and t1 will kick in at the same time. */
+ if ((dhcp->t1_timeout >= dhcp->t2_timeout) && (dhcp->t2_timeout > 0)) {
+ dhcp->t1_timeout = 0;
+ }
+
+ if (dhcp->subnet_mask_given) {
+ /* copy offered network mask */
+ ip_addr_copy(sn_mask, dhcp->offered_sn_mask);
+ } else {
+ /* subnet mask not given, choose a safe subnet mask given the network class */
+ u8_t first_octet = ip4_addr1(&dhcp->offered_ip_addr);
+ if (first_octet <= 127) {
+ ip4_addr_set_u32(&sn_mask, PP_HTONL(0xff000000UL));
+ } else if (first_octet >= 192) {
+ ip4_addr_set_u32(&sn_mask, PP_HTONL(0xffffff00UL));
+ } else {
+ ip4_addr_set_u32(&sn_mask, PP_HTONL(0xffff0000UL));
+ }
+ }
+
+ ip_addr_copy(gw_addr, dhcp->offered_gw_addr);
+ /* gateway address not given? */
+ if (ip_addr_isany(&gw_addr)) {
+ /* copy network address */
+ ip_addr_get_network(&gw_addr, &dhcp->offered_ip_addr, &sn_mask);
+ /* use first host address on network as gateway */
+ ip4_addr_set_u32(&gw_addr, ip4_addr_get_u32(&gw_addr) | PP_HTONL(0x00000001UL));
+ }
+
+#if LWIP_DHCP_AUTOIP_COOP
+ if(dhcp->autoip_coop_state == DHCP_AUTOIP_COOP_STATE_ON) {
+ autoip_stop(netif);
+ dhcp->autoip_coop_state = DHCP_AUTOIP_COOP_STATE_OFF;
+ }
+#endif /* LWIP_DHCP_AUTOIP_COOP */
+
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_bind(): IP: 0x%08"X32_F"\n",
+ ip4_addr_get_u32(&dhcp->offered_ip_addr)));
+ netif_set_ipaddr(netif, &dhcp->offered_ip_addr);
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_bind(): SN: 0x%08"X32_F"\n",
+ ip4_addr_get_u32(&sn_mask)));
+ netif_set_netmask(netif, &sn_mask);
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_bind(): GW: 0x%08"X32_F"\n",
+ ip4_addr_get_u32(&gw_addr)));
+ netif_set_gw(netif, &gw_addr);
+ /* bring the interface up */
+ netif_set_up(netif);
+ /* netif is now bound to DHCP leased address */
+ dhcp_set_state(dhcp, DHCP_BOUND);
+}
+
+/**
+ * Renew an existing DHCP lease at the involved DHCP server.
+ *
+ * @param netif network interface which must renew its lease
+ */
+err_t
+dhcp_renew(struct netif *netif)
+{
+ struct dhcp *dhcp = netif->dhcp;
+ err_t result;
+ u16_t msecs;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_renew()\n"));
+ dhcp_set_state(dhcp, DHCP_RENEWING);
+
+ /* create and initialize the DHCP message header */
+ result = dhcp_create_msg(netif, dhcp, DHCP_REQUEST);
+ if (result == ERR_OK) {
+ dhcp_option(dhcp, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN);
+ dhcp_option_short(dhcp, DHCP_MAX_MSG_LEN(netif));
+
+#if 0
+ dhcp_option(dhcp, DHCP_OPTION_REQUESTED_IP, 4);
+ dhcp_option_long(dhcp, ntohl(dhcp->offered_ip_addr.addr));
+#endif
+
+#if 0
+ dhcp_option(dhcp, DHCP_OPTION_SERVER_ID, 4);
+ dhcp_option_long(dhcp, ntohl(dhcp->server_ip_addr.addr));
+#endif
+
+#if LWIP_NETIF_HOSTNAME
+ dhcp_option_hostname(dhcp, netif);
+#endif /* LWIP_NETIF_HOSTNAME */
+
+ /* append DHCP message trailer */
+ dhcp_option_trailer(dhcp);
+
+ pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len);
+
+ udp_sendto_if(dhcp->pcb, dhcp->p_out, &dhcp->server_ip_addr, DHCP_SERVER_PORT, netif);
+ dhcp_delete_msg(dhcp);
+
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_renew: RENEWING\n"));
+ } else {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("dhcp_renew: could not allocate DHCP request\n"));
+ }
+ dhcp->tries++;
+ /* back-off on retries, but to a maximum of 20 seconds */
+ msecs = dhcp->tries < 10 ? dhcp->tries * 2000 : 20 * 1000;
+ dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_renew(): set request timeout %"U16_F" msecs\n", msecs));
+ return result;
+}
+
+/**
+ * Rebind with a DHCP server for an existing DHCP lease.
+ *
+ * @param netif network interface which must rebind with a DHCP server
+ */
+static err_t
+dhcp_rebind(struct netif *netif)
+{
+ struct dhcp *dhcp = netif->dhcp;
+ err_t result;
+ u16_t msecs;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_rebind()\n"));
+ dhcp_set_state(dhcp, DHCP_REBINDING);
+
+ /* create and initialize the DHCP message header */
+ result = dhcp_create_msg(netif, dhcp, DHCP_REQUEST);
+ if (result == ERR_OK) {
+ dhcp_option(dhcp, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN);
+ dhcp_option_short(dhcp, DHCP_MAX_MSG_LEN(netif));
+
+#if LWIP_NETIF_HOSTNAME
+ dhcp_option_hostname(dhcp, netif);
+#endif /* LWIP_NETIF_HOSTNAME */
+
+#if 0
+ dhcp_option(dhcp, DHCP_OPTION_REQUESTED_IP, 4);
+ dhcp_option_long(dhcp, ntohl(dhcp->offered_ip_addr.addr));
+
+ dhcp_option(dhcp, DHCP_OPTION_SERVER_ID, 4);
+ dhcp_option_long(dhcp, ntohl(dhcp->server_ip_addr.addr));
+#endif
+
+ dhcp_option_trailer(dhcp);
+
+ pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len);
+
+ /* broadcast to server */
+ udp_sendto_if(dhcp->pcb, dhcp->p_out, IP_ADDR_BROADCAST, DHCP_SERVER_PORT, netif);
+ dhcp_delete_msg(dhcp);
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_rebind: REBINDING\n"));
+ } else {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("dhcp_rebind: could not allocate DHCP request\n"));
+ }
+ dhcp->tries++;
+ msecs = dhcp->tries < 10 ? dhcp->tries * 1000 : 10 * 1000;
+ dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_rebind(): set request timeout %"U16_F" msecs\n", msecs));
+ return result;
+}
+
+/**
+ * Enter REBOOTING state to verify an existing lease
+ *
+ * @param netif network interface which must reboot
+ */
+static err_t
+dhcp_reboot(struct netif *netif)
+{
+ struct dhcp *dhcp = netif->dhcp;
+ err_t result;
+ u16_t msecs;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_reboot()\n"));
+ dhcp_set_state(dhcp, DHCP_REBOOTING);
+
+ /* create and initialize the DHCP message header */
+ result = dhcp_create_msg(netif, dhcp, DHCP_REQUEST);
+ if (result == ERR_OK) {
+ dhcp_option(dhcp, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN);
+ dhcp_option_short(dhcp, 576);
+
+ dhcp_option(dhcp, DHCP_OPTION_REQUESTED_IP, 4);
+ dhcp_option_long(dhcp, ntohl(ip4_addr_get_u32(&dhcp->offered_ip_addr)));
+
+ dhcp_option_trailer(dhcp);
+
+ pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len);
+
+ /* broadcast to server */
+ udp_sendto_if(dhcp->pcb, dhcp->p_out, IP_ADDR_BROADCAST, DHCP_SERVER_PORT, netif);
+ dhcp_delete_msg(dhcp);
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_reboot: REBOOTING\n"));
+ } else {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("dhcp_reboot: could not allocate DHCP request\n"));
+ }
+ dhcp->tries++;
+ msecs = dhcp->tries < 10 ? dhcp->tries * 1000 : 10 * 1000;
+ dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_reboot(): set request timeout %"U16_F" msecs\n", msecs));
+ return result;
+}
+
+
+/**
+ * Release a DHCP lease.
+ *
+ * @param netif network interface which must release its lease
+ */
+err_t
+dhcp_release(struct netif *netif)
+{
+ struct dhcp *dhcp = netif->dhcp;
+ err_t result;
+ u16_t msecs;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_release()\n"));
+ if (dhcp == NULL) {
+ return ERR_ARG;
+ }
+
+ /* idle DHCP client */
+ dhcp_set_state(dhcp, DHCP_OFF);
+ /* clean old DHCP offer */
+ ip_addr_set_zero(&dhcp->server_ip_addr);
+ ip_addr_set_zero(&dhcp->offered_ip_addr);
+ ip_addr_set_zero(&dhcp->offered_sn_mask);
+ ip_addr_set_zero(&dhcp->offered_gw_addr);
+#if LWIP_DHCP_BOOTP_FILE
+ ip_addr_set_zero(&dhcp->offered_si_addr);
+#endif /* LWIP_DHCP_BOOTP_FILE */
+ dhcp->offered_t0_lease = dhcp->offered_t1_renew = dhcp->offered_t2_rebind = 0;
+
+ /* create and initialize the DHCP message header */
+ result = dhcp_create_msg(netif, dhcp, DHCP_RELEASE);
+ if (result == ERR_OK) {
+ dhcp_option_trailer(dhcp);
+
+ pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len);
+
+ udp_sendto_if(dhcp->pcb, dhcp->p_out, &dhcp->server_ip_addr, DHCP_SERVER_PORT, netif);
+ dhcp_delete_msg(dhcp);
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_release: RELEASED, DHCP_OFF\n"));
+ } else {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("dhcp_release: could not allocate DHCP request\n"));
+ }
+ dhcp->tries++;
+ msecs = dhcp->tries < 10 ? dhcp->tries * 1000 : 10 * 1000;
+ dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_release(): set request timeout %"U16_F" msecs\n", msecs));
+ /* bring the interface down */
+ netif_set_down(netif);
+ /* remove IP address from interface */
+ netif_set_ipaddr(netif, IP_ADDR_ANY);
+ netif_set_gw(netif, IP_ADDR_ANY);
+ netif_set_netmask(netif, IP_ADDR_ANY);
+
+ return result;
+}
+
+/**
+ * Remove the DHCP client from the interface.
+ *
+ * @param netif The network interface to stop DHCP on
+ */
+void
+dhcp_stop(struct netif *netif)
+{
+ struct dhcp *dhcp;
+ LWIP_ERROR("dhcp_stop: netif != NULL", (netif != NULL), return;);
+ dhcp = netif->dhcp;
+ /* Remove the flag that says this netif is handled by DHCP. */
+ netif->flags &= ~NETIF_FLAG_DHCP;
+
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_stop()\n"));
+ /* netif is DHCP configured? */
+ if (dhcp != NULL) {
+#if LWIP_DHCP_AUTOIP_COOP
+ if(dhcp->autoip_coop_state == DHCP_AUTOIP_COOP_STATE_ON) {
+ autoip_stop(netif);
+ dhcp->autoip_coop_state = DHCP_AUTOIP_COOP_STATE_OFF;
+ }
+#endif /* LWIP_DHCP_AUTOIP_COOP */
+
+ if (dhcp->pcb != NULL) {
+ udp_remove(dhcp->pcb);
+ dhcp->pcb = NULL;
+ }
+ LWIP_ASSERT("reply wasn't freed", dhcp->msg_in == NULL);
+ dhcp_set_state(dhcp, DHCP_OFF);
+ }
+}
+
+/*
+ * Set the DHCP state of a DHCP client.
+ *
+ * If the state changed, reset the number of tries.
+ */
+static void
+dhcp_set_state(struct dhcp *dhcp, u8_t new_state)
+{
+ if (new_state != dhcp->state) {
+ dhcp->state = new_state;
+ dhcp->tries = 0;
+ dhcp->request_timeout = 0;
+ }
+}
+
+/*
+ * Concatenate an option type and length field to the outgoing
+ * DHCP message.
+ *
+ */
+static void
+dhcp_option(struct dhcp *dhcp, u8_t option_type, u8_t option_len)
+{
+ LWIP_ASSERT("dhcp_option: dhcp->options_out_len + 2 + option_len <= DHCP_OPTIONS_LEN", dhcp->options_out_len + 2U + option_len <= DHCP_OPTIONS_LEN);
+ dhcp->msg_out->options[dhcp->options_out_len++] = option_type;
+ dhcp->msg_out->options[dhcp->options_out_len++] = option_len;
+}
+/*
+ * Concatenate a single byte to the outgoing DHCP message.
+ *
+ */
+static void
+dhcp_option_byte(struct dhcp *dhcp, u8_t value)
+{
+ LWIP_ASSERT("dhcp_option_byte: dhcp->options_out_len < DHCP_OPTIONS_LEN", dhcp->options_out_len < DHCP_OPTIONS_LEN);
+ dhcp->msg_out->options[dhcp->options_out_len++] = value;
+}
+
+static void
+dhcp_option_short(struct dhcp *dhcp, u16_t value)
+{
+ LWIP_ASSERT("dhcp_option_short: dhcp->options_out_len + 2 <= DHCP_OPTIONS_LEN", dhcp->options_out_len + 2U <= DHCP_OPTIONS_LEN);
+ dhcp->msg_out->options[dhcp->options_out_len++] = (u8_t)((value & 0xff00U) >> 8);
+ dhcp->msg_out->options[dhcp->options_out_len++] = (u8_t) (value & 0x00ffU);
+}
+
+static void
+dhcp_option_long(struct dhcp *dhcp, u32_t value)
+{
+ LWIP_ASSERT("dhcp_option_long: dhcp->options_out_len + 4 <= DHCP_OPTIONS_LEN", dhcp->options_out_len + 4U <= DHCP_OPTIONS_LEN);
+ dhcp->msg_out->options[dhcp->options_out_len++] = (u8_t)((value & 0xff000000UL) >> 24);
+ dhcp->msg_out->options[dhcp->options_out_len++] = (u8_t)((value & 0x00ff0000UL) >> 16);
+ dhcp->msg_out->options[dhcp->options_out_len++] = (u8_t)((value & 0x0000ff00UL) >> 8);
+ dhcp->msg_out->options[dhcp->options_out_len++] = (u8_t)((value & 0x000000ffUL));
+}
+
+#if LWIP_NETIF_HOSTNAME
+static void
+dhcp_option_hostname(struct dhcp *dhcp, struct netif *netif)
+{
+ if (netif->hostname != NULL) {
+ size_t namelen = strlen(netif->hostname);
+ if (namelen > 0) {
+ u8_t len;
+ const char *p = netif->hostname;
+ /* Shrink len to available bytes (need 2 bytes for OPTION_HOSTNAME
+ and 1 byte for trailer) */
+ size_t available = DHCP_OPTIONS_LEN - dhcp->options_out_len - 3;
+ LWIP_ASSERT("DHCP: hostname is too long!", namelen <= available);
+ len = LWIP_MIN(namelen, available);
+ dhcp_option(dhcp, DHCP_OPTION_HOSTNAME, len);
+ while (len--) {
+ dhcp_option_byte(dhcp, *p++);
+ }
+ }
+ }
+}
+#endif /* LWIP_NETIF_HOSTNAME */
+
+/**
+ * Extract the DHCP message and the DHCP options.
+ *
+ * Extract the DHCP message and the DHCP options, each into a contiguous
+ * piece of memory. As a DHCP message is variable sized by its options,
+ * and also allows overriding some fields for options, the easy approach
+ * is to first unfold the options into a conitguous piece of memory, and
+ * use that further on.
+ *
+ */
+static err_t
+dhcp_parse_reply(struct dhcp *dhcp, struct pbuf *p)
+{
+ u8_t *options;
+ u16_t offset;
+ u16_t offset_max;
+ u16_t options_idx;
+ u16_t options_idx_max;
+ struct pbuf *q;
+ int parse_file_as_options = 0;
+ int parse_sname_as_options = 0;
+
+ /* clear received options */
+ dhcp_clear_all_options(dhcp);
+ /* check that beginning of dhcp_msg (up to and including chaddr) is in first pbuf */
+ if (p->len < DHCP_SNAME_OFS) {
+ return ERR_BUF;
+ }
+ dhcp->msg_in = (struct dhcp_msg *)p->payload;
+#if LWIP_DHCP_BOOTP_FILE
+ /* clear boot file name */
+ dhcp->boot_file_name[0] = 0;
+#endif /* LWIP_DHCP_BOOTP_FILE */
+
+ /* parse options */
+
+ /* start with options field */
+ options_idx = DHCP_OPTIONS_OFS;
+ /* parse options to the end of the received packet */
+ options_idx_max = p->tot_len;
+again:
+ q = p;
+ while((q != NULL) && (options_idx >= q->len)) {
+ options_idx -= q->len;
+ options_idx_max -= q->len;
+ q = q->next;
+ }
+ if (q == NULL) {
+ return ERR_BUF;
+ }
+ offset = options_idx;
+ offset_max = options_idx_max;
+ options = (u8_t*)q->payload;
+ /* at least 1 byte to read and no end marker, then at least 3 bytes to read? */
+ while((q != NULL) && (options[offset] != DHCP_OPTION_END) && (offset < offset_max)) {
+ u8_t op = options[offset];
+ u8_t len;
+ u8_t decode_len = 0;
+ int decode_idx = -1;
+ u16_t val_offset = offset + 2;
+ /* len byte might be in the next pbuf */
+ if (offset + 1 < q->len) {
+ len = options[offset + 1];
+ } else {
+ len = (q->next != NULL ? ((u8_t*)q->next->payload)[0] : 0);
+ }
+ /* LWIP_DEBUGF(DHCP_DEBUG, ("msg_offset=%"U16_F", q->len=%"U16_F, msg_offset, q->len)); */
+ decode_len = len;
+ switch(op) {
+ /* case(DHCP_OPTION_END): handled above */
+ case(DHCP_OPTION_PAD):
+ /* special option: no len encoded */
+ decode_len = len = 0;
+ /* will be increased below */
+ offset--;
+ break;
+ case(DHCP_OPTION_SUBNET_MASK):
+ LWIP_ERROR("len == 4", len == 4, return ERR_VAL;);
+ decode_idx = DHCP_OPTION_IDX_SUBNET_MASK;
+ break;
+ case(DHCP_OPTION_ROUTER):
+ decode_len = 4; /* only copy the first given router */
+ LWIP_ERROR("len >= decode_len", len >= decode_len, return ERR_VAL;);
+ decode_idx = DHCP_OPTION_IDX_ROUTER;
+ break;
+ case(DHCP_OPTION_DNS_SERVER):
+ /* special case: there might be more than one server */
+ LWIP_ERROR("len % 4 == 0", len % 4 == 0, return ERR_VAL;);
+ /* limit number of DNS servers */
+ decode_len = LWIP_MIN(len, 4 * DNS_MAX_SERVERS);
+ LWIP_ERROR("len >= decode_len", len >= decode_len, return ERR_VAL;);
+ decode_idx = DHCP_OPTION_IDX_DNS_SERVER;
+ break;
+ case(DHCP_OPTION_LEASE_TIME):
+ LWIP_ERROR("len == 4", len == 4, return ERR_VAL;);
+ decode_idx = DHCP_OPTION_IDX_LEASE_TIME;
+ break;
+ case(DHCP_OPTION_OVERLOAD):
+ LWIP_ERROR("len == 1", len == 1, return ERR_VAL;);
+ decode_idx = DHCP_OPTION_IDX_OVERLOAD;
+ break;
+ case(DHCP_OPTION_MESSAGE_TYPE):
+ LWIP_ERROR("len == 1", len == 1, return ERR_VAL;);
+ decode_idx = DHCP_OPTION_IDX_MSG_TYPE;
+ break;
+ case(DHCP_OPTION_SERVER_ID):
+ LWIP_ERROR("len == 4", len == 4, return ERR_VAL;);
+ decode_idx = DHCP_OPTION_IDX_SERVER_ID;
+ break;
+ case(DHCP_OPTION_T1):
+ LWIP_ERROR("len == 4", len == 4, return ERR_VAL;);
+ decode_idx = DHCP_OPTION_IDX_T1;
+ break;
+ case(DHCP_OPTION_T2):
+ LWIP_ERROR("len == 4", len == 4, return ERR_VAL;);
+ decode_idx = DHCP_OPTION_IDX_T2;
+ break;
+ default:
+ decode_len = 0;
+ LWIP_DEBUGF(DHCP_DEBUG, ("skipping option %"U16_F" in options\n", op));
+ break;
+ }
+ offset += len + 2;
+ if (decode_len > 0) {
+ u32_t value = 0;
+ u16_t copy_len;
+decode_next:
+ LWIP_ASSERT("check decode_idx", decode_idx >= 0 && decode_idx < DHCP_OPTION_IDX_MAX);
+ if (!dhcp_option_given(dhcp, decode_idx)) {
+ copy_len = LWIP_MIN(decode_len, 4);
+ pbuf_copy_partial(q, &value, copy_len, val_offset);
+ if (decode_len > 4) {
+ /* decode more than one u32_t */
+ LWIP_ERROR("decode_len % 4 == 0", decode_len % 4 == 0, return ERR_VAL;);
+ dhcp_got_option(dhcp, decode_idx);
+ dhcp_set_option_value(dhcp, decode_idx, htonl(value));
+ decode_len -= 4;
+ val_offset += 4;
+ decode_idx++;
+ goto decode_next;
+ } else if (decode_len == 4) {
+ value = ntohl(value);
+ } else {
+ LWIP_ERROR("invalid decode_len", decode_len == 1, return ERR_VAL;);
+ value = ((u8_t*)&value)[0];
+ }
+ dhcp_got_option(dhcp, decode_idx);
+ dhcp_set_option_value(dhcp, decode_idx, value);
+ }
+ }
+ if (offset >= q->len) {
+ offset -= q->len;
+ offset_max -= q->len;
+ if ((offset < offset_max) && offset_max) {
+ q = q->next;
+ LWIP_ASSERT("next pbuf was null", q);
+ options = (u8_t*)q->payload;
+ } else {
+ // We've run out of bytes, probably no end marker. Don't proceed.
+ break;
+ }
+ }
+ }
+ /* is this an overloaded message? */
+ if (dhcp_option_given(dhcp, DHCP_OPTION_IDX_OVERLOAD)) {
+ u32_t overload = dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_OVERLOAD);
+ dhcp_clear_option(dhcp, DHCP_OPTION_IDX_OVERLOAD);
+ if (overload == DHCP_OVERLOAD_FILE) {
+ parse_file_as_options = 1;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("overloaded file field\n"));
+ } else if (overload == DHCP_OVERLOAD_SNAME) {
+ parse_sname_as_options = 1;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("overloaded sname field\n"));
+ } else if (overload == DHCP_OVERLOAD_SNAME_FILE) {
+ parse_sname_as_options = 1;
+ parse_file_as_options = 1;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("overloaded sname and file field\n"));
+ } else {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("invalid overload option: %d\n", (int)overload));
+ }
+#if LWIP_DHCP_BOOTP_FILE
+ if (!parse_file_as_options) {
+ /* only do this for ACK messages */
+ if (dhcp_option_given(dhcp, DHCP_OPTION_IDX_MSG_TYPE) &&
+ (dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_MSG_TYPE) == DHCP_ACK))
+ /* copy bootp file name, don't care for sname (server hostname) */
+ pbuf_copy_partial(p, dhcp->boot_file_name, DHCP_FILE_LEN-1, DHCP_FILE_OFS);
+ /* make sure the string is really NULL-terminated */
+ dhcp->boot_file_name[DHCP_FILE_LEN-1] = 0;
+ }
+#endif /* LWIP_DHCP_BOOTP_FILE */
+ }
+ if (parse_file_as_options) {
+ /* if both are overloaded, parse file first and then sname (RFC 2131 ch. 4.1) */
+ parse_file_as_options = 0;
+ options_idx = DHCP_FILE_OFS;
+ options_idx_max = DHCP_FILE_OFS + DHCP_FILE_LEN;
+ goto again;
+ } else if (parse_sname_as_options) {
+ parse_sname_as_options = 0;
+ options_idx = DHCP_SNAME_OFS;
+ options_idx_max = DHCP_SNAME_OFS + DHCP_SNAME_LEN;
+ goto again;
+ }
+ return ERR_OK;
+}
+
+/**
+ * If an incoming DHCP message is in response to us, then trigger the state machine
+ */
+static void
+dhcp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, ip_addr_t *addr, u16_t port)
+{
+ struct netif *netif = (struct netif *)arg;
+ struct dhcp *dhcp = netif->dhcp;
+ struct dhcp_msg *reply_msg = (struct dhcp_msg *)p->payload;
+ u8_t msg_type;
+ u8_t i;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_recv(pbuf = %p) from DHCP server %"U16_F".%"U16_F".%"U16_F".%"U16_F" port %"U16_F"\n", (void*)p,
+ ip4_addr1_16(addr), ip4_addr2_16(addr), ip4_addr3_16(addr), ip4_addr4_16(addr), port));
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("pbuf->len = %"U16_F"\n", p->len));
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("pbuf->tot_len = %"U16_F"\n", p->tot_len));
+ /* prevent warnings about unused arguments */
+ LWIP_UNUSED_ARG(pcb);
+ LWIP_UNUSED_ARG(addr);
+ LWIP_UNUSED_ARG(port);
+
+ LWIP_ASSERT("reply wasn't freed", dhcp->msg_in == NULL);
+
+ if (p->len < DHCP_MIN_REPLY_LEN) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, ("DHCP reply message or pbuf too short\n"));
+ goto free_pbuf_and_return;
+ }
+
+ if (reply_msg->op != DHCP_BOOTREPLY) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, ("not a DHCP reply message, but type %"U16_F"\n", (u16_t)reply_msg->op));
+ goto free_pbuf_and_return;
+ }
+ /* iterate through hardware address and match against DHCP message */
+ for (i = 0; i < netif->hwaddr_len; i++) {
+ if (netif->hwaddr[i] != reply_msg->chaddr[i]) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING,
+ ("netif->hwaddr[%"U16_F"]==%02"X16_F" != reply_msg->chaddr[%"U16_F"]==%02"X16_F"\n",
+ (u16_t)i, (u16_t)netif->hwaddr[i], (u16_t)i, (u16_t)reply_msg->chaddr[i]));
+ goto free_pbuf_and_return;
+ }
+ }
+ /* match transaction ID against what we expected */
+ if (ntohl(reply_msg->xid) != dhcp->xid) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING,
+ ("transaction id mismatch reply_msg->xid(%"X32_F")!=dhcp->xid(%"X32_F")\n",ntohl(reply_msg->xid),dhcp->xid));
+ goto free_pbuf_and_return;
+ }
+ /* option fields could be unfold? */
+ if (dhcp_parse_reply(dhcp, p) != ERR_OK) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS,
+ ("problem unfolding DHCP message - too short on memory?\n"));
+ goto free_pbuf_and_return;
+ }
+
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("searching DHCP_OPTION_MESSAGE_TYPE\n"));
+ /* obtain pointer to DHCP message type */
+ if (!dhcp_option_given(dhcp, DHCP_OPTION_IDX_MSG_TYPE)) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, ("DHCP_OPTION_MESSAGE_TYPE option not found\n"));
+ goto free_pbuf_and_return;
+ }
+
+ /* read DHCP message type */
+ msg_type = (u8_t)dhcp_get_option_value(dhcp, DHCP_OPTION_IDX_MSG_TYPE);
+ /* message type is DHCP ACK? */
+ if (msg_type == DHCP_ACK) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("DHCP_ACK received\n"));
+ /* in requesting state? */
+ if (dhcp->state == DHCP_REQUESTING) {
+ dhcp_handle_ack(netif);
+#if DHCP_DOES_ARP_CHECK
+ /* check if the acknowledged lease address is already in use */
+ dhcp_check(netif);
+#else
+ /* bind interface to the acknowledged lease address */
+ dhcp_bind(netif);
+#endif
+ }
+ /* already bound to the given lease address? */
+ else if ((dhcp->state == DHCP_REBOOTING) || (dhcp->state == DHCP_REBINDING) || (dhcp->state == DHCP_RENEWING)) {
+ dhcp_bind(netif);
+ }
+ }
+ /* received a DHCP_NAK in appropriate state? */
+ else if ((msg_type == DHCP_NAK) &&
+ ((dhcp->state == DHCP_REBOOTING) || (dhcp->state == DHCP_REQUESTING) ||
+ (dhcp->state == DHCP_REBINDING) || (dhcp->state == DHCP_RENEWING ))) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("DHCP_NAK received\n"));
+ dhcp_handle_nak(netif);
+ }
+ /* received a DHCP_OFFER in DHCP_SELECTING state? */
+ else if ((msg_type == DHCP_OFFER) && (dhcp->state == DHCP_SELECTING)) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("DHCP_OFFER received in DHCP_SELECTING state\n"));
+ dhcp->request_timeout = 0;
+ /* remember offered lease */
+ dhcp_handle_offer(netif);
+ }
+free_pbuf_and_return:
+ dhcp->msg_in = NULL;
+ pbuf_free(p);
+}
+
+/**
+ * Create a DHCP request, fill in common headers
+ *
+ * @param netif the netif under DHCP control
+ * @param dhcp dhcp control struct
+ * @param message_type message type of the request
+ */
+static err_t
+dhcp_create_msg(struct netif *netif, struct dhcp *dhcp, u8_t message_type)
+{
+ u16_t i;
+#ifndef DHCP_GLOBAL_XID
+ /** default global transaction identifier starting value (easy to match
+ * with a packet analyser). We simply increment for each new request.
+ * Predefine DHCP_GLOBAL_XID to a better value or a function call to generate one
+ * at runtime, any supporting function prototypes can be defined in DHCP_GLOBAL_XID_HEADER */
+#if DHCP_CREATE_RAND_XID && defined(LWIP_RAND)
+ static u32_t xid;
+#else /* DHCP_CREATE_RAND_XID && defined(LWIP_RAND) */
+ static u32_t xid = 0xABCD0000;
+#endif /* DHCP_CREATE_RAND_XID && defined(LWIP_RAND) */
+#else
+ if (!xid_initialised) {
+ xid = DHCP_GLOBAL_XID;
+ xid_initialised = !xid_initialised;
+ }
+#endif
+ LWIP_ERROR("dhcp_create_msg: netif != NULL", (netif != NULL), return ERR_ARG;);
+ LWIP_ERROR("dhcp_create_msg: dhcp != NULL", (dhcp != NULL), return ERR_VAL;);
+
+ /* free previous dhcp msg, in case it is not freed yet */
+ /* otherwise, memory leaks */
+ if (dhcp->p_out != NULL)
+ dhcp_delete_msg(dhcp);
+
+ dhcp->p_out = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct dhcp_msg), PBUF_RAM);
+ if (dhcp->p_out == NULL) {
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS,
+ ("dhcp_create_msg(): could not allocate pbuf\n"));
+ return ERR_MEM;
+ }
+ LWIP_ASSERT("dhcp_create_msg: check that first pbuf can hold struct dhcp_msg",
+ (dhcp->p_out->len >= sizeof(struct dhcp_msg)));
+
+ /* reuse transaction identifier in retransmissions */
+ if (dhcp->tries == 0) {
+#if DHCP_CREATE_RAND_XID && defined(LWIP_RAND)
+ xid = LWIP_RAND();
+#else /* DHCP_CREATE_RAND_XID && defined(LWIP_RAND) */
+ xid++;
+#endif /* DHCP_CREATE_RAND_XID && defined(LWIP_RAND) */
+ }
+ dhcp->xid = xid;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE,
+ ("transaction id xid(%"X32_F")\n", xid));
+
+ dhcp->msg_out = (struct dhcp_msg *)dhcp->p_out->payload;
+
+ dhcp->msg_out->op = DHCP_BOOTREQUEST;
+ /* TODO: make link layer independent */
+ dhcp->msg_out->htype = DHCP_HTYPE_ETH;
+ dhcp->msg_out->hlen = netif->hwaddr_len;
+ dhcp->msg_out->hops = 0;
+ dhcp->msg_out->xid = htonl(dhcp->xid);
+ dhcp->msg_out->secs = 0;
+ /* we don't need the broadcast flag since we can receive unicast traffic
+ before being fully configured! */
+ dhcp->msg_out->flags = 0;
+ ip_addr_set_zero(&dhcp->msg_out->ciaddr);
+ /* set ciaddr to netif->ip_addr based on message_type and state */
+ if ((message_type == DHCP_INFORM) || (message_type == DHCP_DECLINE) ||
+ ((message_type == DHCP_REQUEST) && /* DHCP_BOUND not used for sending! */
+ ((dhcp->state==DHCP_RENEWING) || dhcp->state==DHCP_REBINDING))) {
+ ip_addr_copy(dhcp->msg_out->ciaddr, netif->ip_addr);
+ }
+ ip_addr_set_zero(&dhcp->msg_out->yiaddr);
+ ip_addr_set_zero(&dhcp->msg_out->siaddr);
+ ip_addr_set_zero(&dhcp->msg_out->giaddr);
+ for (i = 0; i < DHCP_CHADDR_LEN; i++) {
+ /* copy netif hardware address, pad with zeroes */
+ dhcp->msg_out->chaddr[i] = (i < netif->hwaddr_len && i < NETIF_MAX_HWADDR_LEN) ? netif->hwaddr[i] : 0/* pad byte*/;
+ }
+ for (i = 0; i < DHCP_SNAME_LEN; i++) {
+ dhcp->msg_out->sname[i] = 0;
+ }
+ for (i = 0; i < DHCP_FILE_LEN; i++) {
+ dhcp->msg_out->file[i] = 0;
+ }
+ dhcp->msg_out->cookie = PP_HTONL(DHCP_MAGIC_COOKIE);
+ dhcp->options_out_len = 0;
+ /* fill options field with an incrementing array (for debugging purposes) */
+ for (i = 0; i < DHCP_OPTIONS_LEN; i++) {
+ dhcp->msg_out->options[i] = (u8_t)i; /* for debugging only, no matter if truncated */
+ }
+ /* Add option MESSAGE_TYPE */
+ dhcp_option(dhcp, DHCP_OPTION_MESSAGE_TYPE, DHCP_OPTION_MESSAGE_TYPE_LEN);
+ dhcp_option_byte(dhcp, message_type);
+ return ERR_OK;
+}
+
+/**
+ * Free previously allocated memory used to send a DHCP request.
+ *
+ * @param dhcp the dhcp struct to free the request from
+ */
+static void
+dhcp_delete_msg(struct dhcp *dhcp)
+{
+ LWIP_ERROR("dhcp_delete_msg: dhcp != NULL", (dhcp != NULL), return;);
+ LWIP_ASSERT("dhcp_delete_msg: dhcp->p_out != NULL", dhcp->p_out != NULL);
+ LWIP_ASSERT("dhcp_delete_msg: dhcp->msg_out != NULL", dhcp->msg_out != NULL);
+ if (dhcp->p_out != NULL) {
+ pbuf_free(dhcp->p_out);
+ }
+ dhcp->p_out = NULL;
+ dhcp->msg_out = NULL;
+}
+
+/**
+ * Add a DHCP message trailer
+ *
+ * Adds the END option to the DHCP message, and if
+ * necessary, up to three padding bytes.
+ *
+ * @param dhcp DHCP state structure
+ */
+static void
+dhcp_option_trailer(struct dhcp *dhcp)
+{
+ LWIP_ERROR("dhcp_option_trailer: dhcp != NULL", (dhcp != NULL), return;);
+ LWIP_ASSERT("dhcp_option_trailer: dhcp->msg_out != NULL\n", dhcp->msg_out != NULL);
+ LWIP_ASSERT("dhcp_option_trailer: dhcp->options_out_len < DHCP_OPTIONS_LEN\n", dhcp->options_out_len < DHCP_OPTIONS_LEN);
+ dhcp->msg_out->options[dhcp->options_out_len++] = DHCP_OPTION_END;
+ /* packet is too small, or not 4 byte aligned? */
+ while (((dhcp->options_out_len < DHCP_MIN_OPTIONS_LEN) || (dhcp->options_out_len & 3)) &&
+ (dhcp->options_out_len < DHCP_OPTIONS_LEN)) {
+ /* add a fill/padding byte */
+ dhcp->msg_out->options[dhcp->options_out_len++] = 0;
+ }
+}
+
+#endif /* LWIP_DHCP */
diff --git a/lwip/src/core/dns.c b/lwip/src/core/dns.c
new file mode 100644
index 0000000..06d203a
--- /dev/null
+++ b/lwip/src/core/dns.c
@@ -0,0 +1,1311 @@
+/**
+ * @file
+ * DNS - host name to IP address resolver.
+ *
+ */
+
+/**
+
+ * This file implements a DNS host name to IP address resolver.
+
+ * Port to lwIP from uIP
+ * by Jim Pettinato April 2007
+
+ * uIP version Copyright (c) 2002-2003, Adam Dunkels.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * DNS.C
+ *
+ * The lwIP DNS resolver functions are used to lookup a host name and
+ * map it to a numerical IP address. It maintains a list of resolved
+ * hostnames that can be queried with the dns_lookup() function.
+ * New hostnames can be resolved using the dns_enqueue() function.
+ *
+ * The lwIP version of the resolver also adds a non-blocking version of
+ * gethostbyname() that will work with a raw API application. This function
+ * checks for an IP address string first and converts it if it is valid.
+ * gethostbyname() then does a dns_lookup() to see if the name is
+ * already in the table. If so, the IP is returned. If not, a query is
+ * issued and the function returns with a ERR_INPROGRESS status. The app
+ * using the dns client must then go into a waiting state.
+ *
+ * Once a hostname has been resolved (or found to be non-existent),
+ * the resolver code calls a specified callback function (which
+ * must be implemented by the module that uses the resolver).
+ */
+
+/*-----------------------------------------------------------------------------
+ * RFC 1035 - Domain names - implementation and specification
+ * RFC 2181 - Clarifications to the DNS Specification
+ *----------------------------------------------------------------------------*/
+
+/** @todo: define good default values (rfc compliance) */
+/** @todo: improve answer parsing, more checkings... */
+/** @todo: check RFC1035 - 7.3. Processing responses */
+
+/*-----------------------------------------------------------------------------
+ * Includes
+ *----------------------------------------------------------------------------*/
+
+#include "lwip/opt.h"
+
+#if LWIP_DNS /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/udp.h"
+#include "lwip/mem.h"
+#include "lwip/memp.h"
+#include "lwip/dns.h"
+
+#include <string.h>
+
+/** DNS server IP address */
+#ifndef DNS_SERVER_ADDRESS
+#define DNS_SERVER_ADDRESS(ipaddr) (ip4_addr_set_u32(ipaddr, ipaddr_addr("208.67.222.222"))) /* resolver1.opendns.com */
+#endif
+
+/** DNS server port address */
+#ifndef DNS_SERVER_PORT
+#define DNS_SERVER_PORT 53
+#endif
+
+/** DNS maximum number of retries when asking for a name, before "timeout". */
+#ifndef DNS_MAX_RETRIES
+#define DNS_MAX_RETRIES 4
+#endif
+
+/** DNS max attempts to find unique random ID */
+#ifndef DNS_MAX_RAND_ATTEMPT
+#define DNS_MAX_RAND_ATTEMPT 4
+#endif
+
+#if DNS_MAX_RAND_ATTEMPT < DNS_TABLE_SIZE
+/* need to retry at least as many times as you have */
+/* table entries, or the IDs might not be unique */
+#undef DNS_MAX_RAND_ATTEMPT
+#define DNS_MAX_RAND_ATTEMPT DNS_TABLE_SIZE
+#endif
+
+
+
+/** DNS resource record max. TTL (one week as default) */
+#ifndef DNS_MAX_TTL
+#define DNS_MAX_TTL 604800
+#endif
+
+/* DNS protocol flags */
+#define DNS_FLAG1_RESPONSE 0x80
+#define DNS_FLAG1_OPCODE_STATUS 0x10
+#define DNS_FLAG1_OPCODE_INVERSE 0x08
+#define DNS_FLAG1_OPCODE_STANDARD 0x00
+#define DNS_FLAG1_AUTHORATIVE 0x04
+#define DNS_FLAG1_TRUNC 0x02
+#define DNS_FLAG1_RD 0x01
+#define DNS_FLAG2_RA 0x80
+#define DNS_FLAG2_ERR_MASK 0x0f
+#define DNS_FLAG2_ERR_NONE 0x00
+#define DNS_FLAG2_ERR_NAME 0x03
+
+/* DNS protocol states */
+#define DNS_STATE_UNUSED 0
+#define DNS_STATE_NEW 1
+#define DNS_STATE_ASKING 2
+#define DNS_STATE_UNANSWERED 3
+#define DNS_STATE_DONE 4
+
+#ifdef PACK_STRUCT_USE_INCLUDES
+# include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+/** DNS message header */
+struct dns_hdr {
+ PACK_STRUCT_FIELD(u16_t id);
+ PACK_STRUCT_FIELD(u8_t flags1);
+ PACK_STRUCT_FIELD(u8_t flags2);
+ PACK_STRUCT_FIELD(u16_t numquestions);
+ PACK_STRUCT_FIELD(u16_t numanswers);
+ PACK_STRUCT_FIELD(u16_t numauthrr);
+ PACK_STRUCT_FIELD(u16_t numextrarr);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+# include "arch/epstruct.h"
+#endif
+#define SIZEOF_DNS_HDR 12
+
+/** DNS query message structure.
+ No packing needed: only used locally on the stack. */
+struct dns_query {
+ /* DNS query record starts with either a domain name or a pointer
+ to a name already present somewhere in the packet. */
+ u16_t type;
+ u16_t cls;
+};
+#define SIZEOF_DNS_QUERY 4
+
+/** DNS answer message structure.
+ No packing needed: only used locally on the stack. */
+struct dns_answer {
+ /* DNS answer record starts with either a domain name or a pointer
+ to a name already present somewhere in the packet. */
+ u16_t type;
+ u16_t cls;
+ u32_t ttl;
+ u16_t len;
+};
+#define SIZEOF_DNS_ANSWER 10
+
+/** DNS table entry */
+struct dns_table_entry {
+ u32_t ttl;
+ u16_t queryID;
+ u8_t state;
+ u8_t numdns;
+ u8_t tmr;
+ u8_t ismulti;
+ dns_found_callbackX found;
+ void *arg;
+ u8_t retries;
+ u8_t seqno;
+ u8_t err;
+ u8_t numipaddrs;
+ ip_addr_t ipaddrs[DNS_MAX_ADDRS_PER_NAME];
+ u8_t offset;
+ char name[DNS_MAX_NAME_LENGTH];
+ /* pointer to callback on DNS query done */
+};
+
+volatile u16_t newID;
+
+/* Bool type does not seem to be defined */
+typedef int bool;
+
+enum{
+ false = 0,
+ true = 1
+};
+
+#if DNS_LOCAL_HOSTLIST
+
+#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC
+/** Local host-list. For hostnames in this list, no
+ * external name resolution is performed */
+static struct local_hostlist_entry *local_hostlist_dynamic;
+#else /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
+
+/** Defining this allows the local_hostlist_static to be placed in a different
+ * linker section (e.g. FLASH) */
+#ifndef DNS_LOCAL_HOSTLIST_STORAGE_PRE
+#define DNS_LOCAL_HOSTLIST_STORAGE_PRE static
+#endif /* DNS_LOCAL_HOSTLIST_STORAGE_PRE */
+/** Defining this allows the local_hostlist_static to be placed in a different
+ * linker section (e.g. FLASH) */
+#ifndef DNS_LOCAL_HOSTLIST_STORAGE_POST
+#define DNS_LOCAL_HOSTLIST_STORAGE_POST
+#endif /* DNS_LOCAL_HOSTLIST_STORAGE_POST */
+DNS_LOCAL_HOSTLIST_STORAGE_PRE struct local_hostlist_entry local_hostlist_static[]
+ DNS_LOCAL_HOSTLIST_STORAGE_POST = DNS_LOCAL_HOSTLIST_INIT;
+
+#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
+
+static void dns_init_local();
+#endif /* DNS_LOCAL_HOSTLIST */
+
+
+/* forward declarations */
+static void dns_recv(void *s, struct udp_pcb *pcb, struct pbuf *p, ip_addr_t *addr, u16_t port);
+static void dns_check_entries(void);
+
+/*-----------------------------------------------------------------------------
+ * Globales
+ *----------------------------------------------------------------------------*/
+
+/* DNS variables */
+static struct udp_pcb *dns_pcb;
+static u8_t dns_seqno;
+static struct dns_table_entry dns_table[DNS_TABLE_SIZE];
+static ip_addr_t dns_servers[DNS_MAX_SERVERS];
+/** Contiguous buffer for processing responses */
+static u8_t dns_payload_buffer[LWIP_MEM_ALIGN_BUFFER(DNS_MSG_SIZE)];
+static u8_t* dns_payload;
+
+/**
+ * Initialize the resolver: set up the UDP pcb and configure the default server
+ * (DNS_SERVER_ADDRESS).
+ */
+
+void
+dns_init()
+{
+ ip_addr_t dnsserver;
+
+ dns_payload = (u8_t *)LWIP_MEM_ALIGN(dns_payload_buffer);
+
+ /* initialize default DNS server address */
+ DNS_SERVER_ADDRESS(&dnsserver);
+
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_init: initializing\n"));
+
+ /* if dns client not yet initialized... */
+ if (dns_pcb == NULL) {
+ dns_pcb = udp_new();
+
+ if (dns_pcb != NULL) {
+ /* initialize DNS table not needed (initialized to zero since it is a
+ * global variable) */
+ LWIP_ASSERT("For implicit initialization to work, DNS_STATE_UNUSED needs to be 0",
+ DNS_STATE_UNUSED == 0);
+
+ /* initialize DNS client */
+ udp_bind(dns_pcb, IP_ADDR_ANY, 0);
+ udp_recv(dns_pcb, dns_recv, NULL);
+
+ /* initialize default DNS primary server */
+ dns_setserver(0, &dnsserver);
+ }
+ }
+#if DNS_LOCAL_HOSTLIST
+ dns_init_local();
+#endif
+}
+
+/**
+ * Initialize one of the DNS servers.
+ *
+ * @param numdns the index of the DNS server to set must be < DNS_MAX_SERVERS
+ * @param dnsserver IP address of the DNS server to set
+ */
+void
+dns_setserver(u8_t numdns, ip_addr_t *dnsserver)
+{
+ if ((numdns < DNS_MAX_SERVERS) && (dns_pcb != NULL) &&
+ (dnsserver != NULL) && !ip_addr_isany(dnsserver)) {
+ dns_servers[numdns] = (*dnsserver);
+ }
+}
+
+/**
+ * Obtain one of the currently configured DNS server.
+ *
+ * @param numdns the index of the DNS server
+ * @return IP address of the indexed DNS server or "ip_addr_any" if the DNS
+ * server has not been configured.
+ */
+ip_addr_t
+dns_getserver(u8_t numdns)
+{
+ if (numdns < DNS_MAX_SERVERS) {
+ return dns_servers[numdns];
+ } else {
+ return *IP_ADDR_ANY;
+ }
+}
+
+/**
+ * The DNS resolver client timer - handle retries and timeouts and should
+ * be called every DNS_TMR_INTERVAL milliseconds (every second by default).
+ */
+void
+dns_tmr(void)
+{
+ if (dns_pcb != NULL) {
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_tmr: dns_check_entries\n"));
+ dns_check_entries();
+ }
+}
+
+#if DNS_LOCAL_HOSTLIST
+static void
+dns_init_local()
+{
+#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC && defined(DNS_LOCAL_HOSTLIST_INIT)
+ int i;
+ struct local_hostlist_entry *entry;
+ /* Dynamic: copy entries from DNS_LOCAL_HOSTLIST_INIT to list */
+ struct local_hostlist_entry local_hostlist_init[] = DNS_LOCAL_HOSTLIST_INIT;
+ size_t namelen;
+ for (i = 0; i < sizeof(local_hostlist_init) / sizeof(struct local_hostlist_entry); i++) {
+ struct local_hostlist_entry *init_entry = &local_hostlist_init[i];
+ LWIP_ASSERT("invalid host name (NULL)", init_entry->name != NULL);
+ namelen = strlen(init_entry->name);
+ LWIP_ASSERT("namelen <= DNS_LOCAL_HOSTLIST_MAX_NAMELEN", namelen <= DNS_LOCAL_HOSTLIST_MAX_NAMELEN);
+ entry = (struct local_hostlist_entry *)memp_malloc(MEMP_LOCALHOSTLIST);
+ LWIP_ASSERT("mem-error in dns_init_local", entry != NULL);
+ if (entry != NULL) {
+ entry->name = (char*)entry + sizeof(struct local_hostlist_entry);
+ MEMCPY((char*)entry->name, init_entry->name, namelen);
+ ((char*)entry->name)[namelen] = 0;
+ entry->addr = init_entry->addr;
+ entry->next = local_hostlist_dynamic;
+ local_hostlist_dynamic = entry;
+ }
+ }
+#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC && defined(DNS_LOCAL_HOSTLIST_INIT) */
+}
+
+/**
+ * Scans the local host-list for a hostname.
+ *
+ * @param hostname Hostname to look for in the local host-list
+ * @return The first IP address for the hostname in the local host-list or
+ * IPADDR_NONE if not found.
+ */
+static u32_t
+dns_lookup_local(const char *hostname)
+{
+#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC
+ struct local_hostlist_entry *entry = local_hostlist_dynamic;
+ while(entry != NULL) {
+ if(strcmp(entry->name, hostname) == 0) {
+ return ip4_addr_get_u32(&entry->addr);
+ }
+ entry = entry->next;
+ }
+#else /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
+ int i;
+ for (i = 0; i < sizeof(local_hostlist_static) / sizeof(struct local_hostlist_entry); i++) {
+ if(strcmp(local_hostlist_static[i].name, hostname) == 0) {
+ return ip4_addr_get_u32(&local_hostlist_static[i].addr);
+ }
+ }
+#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
+ return IPADDR_NONE;
+}
+
+#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC
+/** Remove all entries from the local host-list for a specific hostname
+ * and/or IP addess
+ *
+ * @param hostname hostname for which entries shall be removed from the local
+ * host-list
+ * @param addr address for which entries shall be removed from the local host-list
+ * @return the number of removed entries
+ */
+int
+dns_local_removehost(const char *hostname, const ip_addr_t *addr)
+{
+ int removed = 0;
+ struct local_hostlist_entry *entry = local_hostlist_dynamic;
+ struct local_hostlist_entry *last_entry = NULL;
+ while (entry != NULL) {
+ if (((hostname == NULL) || !strcmp(entry->name, hostname)) &&
+ ((addr == NULL) || ip_addr_cmp(&entry->addr, addr))) {
+ struct local_hostlist_entry *free_entry;
+ if (last_entry != NULL) {
+ last_entry->next = entry->next;
+ } else {
+ local_hostlist_dynamic = entry->next;
+ }
+ free_entry = entry;
+ entry = entry->next;
+ memp_free(MEMP_LOCALHOSTLIST, free_entry);
+ removed++;
+ } else {
+ last_entry = entry;
+ entry = entry->next;
+ }
+ }
+ return removed;
+}
+
+/**
+ * Add a hostname/IP address pair to the local host-list.
+ * Duplicates are not checked.
+ *
+ * @param hostname hostname of the new entry
+ * @param addr IP address of the new entry
+ * @return ERR_OK if succeeded or ERR_MEM on memory error
+ */
+err_t
+dns_local_addhost(const char *hostname, const ip_addr_t *addr)
+{
+ struct local_hostlist_entry *entry;
+ size_t namelen;
+ LWIP_ASSERT("invalid host name (NULL)", hostname != NULL);
+ namelen = strlen(hostname);
+ LWIP_ASSERT("namelen <= DNS_LOCAL_HOSTLIST_MAX_NAMELEN", namelen <= DNS_LOCAL_HOSTLIST_MAX_NAMELEN);
+ entry = (struct local_hostlist_entry *)memp_malloc(MEMP_LOCALHOSTLIST);
+ if (entry == NULL) {
+ return ERR_MEM;
+ }
+ entry->name = (char*)entry + sizeof(struct local_hostlist_entry);
+ MEMCPY((char*)entry->name, hostname, namelen);
+ ((char*)entry->name)[namelen] = 0;
+ ip_addr_copy(entry->addr, *addr);
+ entry->next = local_hostlist_dynamic;
+ local_hostlist_dynamic = entry;
+ return ERR_OK;
+}
+#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC*/
+#endif /* DNS_LOCAL_HOSTLIST */
+
+/**
+ * Look up a hostname in the array of known hostnames.
+ *
+ * @note This function only looks in the internal array of known
+ * hostnames, it does not send out a query for the hostname if none
+ * was found. The function dns_enqueue() can be used to send a query
+ * for a hostname.
+ *
+ * @param name the hostname to look up
+ * @param ipaddrs the ip_addr_t array where the found IP addresses are saved (if any)
+ * @param numipaddrs maximum number of IP addresses the caller is asking for
+ * @return true if at least one IP address is associated with hostname (false if none are found)
+ */
+static u8_t
+dns_lookup(const char *name, ip_addr_t *ipaddrs, u8_t *numipaddrs)
+{
+ u8_t i, j;
+#if DNS_LOCAL_HOSTLIST || defined(DNS_LOOKUP_LOCAL_EXTERN)
+ u32_t ipaddr;
+#endif /* DNS_LOCAL_HOSTLIST || defined(DNS_LOOKUP_LOCAL_EXTERN) */
+#if DNS_LOCAL_HOSTLIST
+ if ((ipaddr = dns_lookup_local(name)) != IPADDR_NONE) {
+ ip4_addr_set_u32(ipaddrs, ipaddr);
+ *numipaddrs = 1;
+ return 1;
+ }
+#endif /* DNS_LOCAL_HOSTLIST */
+#ifdef DNS_LOOKUP_LOCAL_EXTERN
+ if((ipaddr = DNS_LOOKUP_LOCAL_EXTERN(name)) != IPADDR_NONE) {
+ ip4_addr_set_u32(ipaddrs, ipaddr);
+ *numipaddrs = 1;
+ return 1;
+ }
+#endif /* DNS_LOOKUP_LOCAL_EXTERN */
+
+ /* Walk through name list, return true if found. If not, return false. */
+ for (i = 0; i < DNS_TABLE_SIZE; ++i) {
+ if ((dns_table[i].state == DNS_STATE_DONE) &&
+ (strcmp(name, dns_table[i].name) == 0)) {
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_lookup: \"%s\": numipaddrs = ", name));
+ ip_addr_debug_print(DNS_DEBUG, &(dns_table[i].numipaddrs));
+ LWIP_DEBUGF(DNS_DEBUG, ("\n"));
+ dns_table[i].offset++;
+ *numipaddrs = LWIP_MIN(dns_table[i].numipaddrs, *numipaddrs);
+ if (*numipaddrs > 0) {
+ for (j = 0; j < *numipaddrs; ++j) {
+ memcpy(&ipaddrs[j], &dns_table[i].ipaddrs[(dns_table[i].offset + j) % dns_table[i].numipaddrs], sizeof(ip_addr_t));
+ }
+ }
+ return 1;
+ }
+ }
+ return 0;
+}
+
+#if DNS_DOES_NAME_CHECK
+/**
+ * Compare the "dotted" name "query" with the encoded name "response"
+ * to make sure an answer from the DNS server matches the current dns_table
+ * entry (otherwise, answers might arrive late for hostname not on the list
+ * any more).
+ *
+ * @param query hostname (not encoded) from the dns_table
+ * @param response encoded hostname in the DNS response
+ * @return 0: names equal; 1: names differ
+ */
+static u8_t
+dns_compare_name(unsigned char *query, unsigned char *response)
+{
+ unsigned char n;
+
+ do {
+ n = *response++;
+ /** @see RFC 1035 - 4.1.4. Message compression */
+ if ((n & 0xc0) == 0xc0) {
+ /* Compressed name */
+ break;
+ } else {
+ /* Not compressed name */
+ while (n > 0) {
+ if ((*query) != (*response)) {
+ return 1;
+ }
+ ++response;
+ ++query;
+ --n;
+ };
+ ++query;
+ }
+ } while (*response != 0);
+
+ return 0;
+}
+#endif /* DNS_DOES_NAME_CHECK */
+
+/**
+ * Walk through a compact encoded DNS name and return the end of the name.
+ *
+ * @param query encoded DNS name in the DNS server response
+ * @return end of the name
+ */
+static unsigned char *
+dns_parse_name(unsigned char *query)
+{
+ unsigned char n;
+
+ do {
+ n = *query++;
+ /** @see RFC 1035 - 4.1.4. Message compression */
+ if ((n & 0xc0) == 0xc0) {
+ /* Compressed name */
+ break;
+ } else {
+ /* Not compressed name */
+ while (n > 0) {
+ ++query;
+ --n;
+ };
+ }
+ } while (*query != 0);
+
+ return query + 1;
+}
+
+/**
+ * Send a DNS query packet.
+ *
+ * @param numdns index of the DNS server in the dns_servers table
+ * @param name hostname to query
+ * @param id index of the hostname in dns_table, used as transaction ID in the
+ * DNS query packet
+ * @return ERR_OK if packet is sent; an err_t indicating the problem otherwise
+ */
+static err_t
+dns_send(u8_t numdns, const char* name, u16_t id)
+{
+ err_t err;
+ struct dns_hdr *hdr;
+ struct dns_query qry;
+ struct pbuf *p;
+ char *query, *nptr;
+ const char *pHostname;
+ u8_t n;
+
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_send: dns_servers[%"U16_F"] \"%s\": request\n",
+ (u16_t)(numdns), name));
+ LWIP_ASSERT("dns server out of array", numdns < DNS_MAX_SERVERS);
+ LWIP_ASSERT("dns server has no IP address set", !ip_addr_isany(&dns_servers[numdns]));
+
+ /* if here, we have either a new query or a retry on a previous query to process */
+ p = pbuf_alloc(PBUF_TRANSPORT, SIZEOF_DNS_HDR + DNS_MAX_NAME_LENGTH +
+ SIZEOF_DNS_QUERY, PBUF_RAM);
+ if (p != NULL) {
+ LWIP_ASSERT("pbuf must be in one piece", p->next == NULL);
+ /* fill dns header */
+ hdr = (struct dns_hdr*)p->payload;
+ memset(hdr, 0, SIZEOF_DNS_HDR);
+ hdr->id = htons(id);
+ hdr->flags1 = DNS_FLAG1_RD;
+ hdr->numquestions = PP_HTONS(1);
+ query = (char*)hdr + SIZEOF_DNS_HDR;
+ pHostname = name;
+ --pHostname;
+
+ /* convert hostname into suitable query format. */
+ do {
+ ++pHostname;
+ nptr = query;
+ ++query;
+ for(n = 0; *pHostname != '.' && *pHostname != 0; ++pHostname) {
+ *query = *pHostname;
+ ++query;
+ ++n;
+ }
+ *nptr = n;
+ } while(*pHostname != 0);
+ *query++='\0';
+
+ /* fill dns query */
+ qry.type = PP_HTONS(DNS_RRTYPE_A);
+ qry.cls = PP_HTONS(DNS_RRCLASS_IN);
+ SMEMCPY(query, &qry, SIZEOF_DNS_QUERY);
+
+ /* resize pbuf to the exact dns query */
+ pbuf_realloc(p, (u16_t)((query + SIZEOF_DNS_QUERY) - ((char*)(p->payload))));
+
+ /* connect to the server for faster receiving */
+ udp_connect(dns_pcb, &dns_servers[numdns], DNS_SERVER_PORT);
+ /* send dns packet */
+ err = udp_sendto(dns_pcb, p, &dns_servers[numdns], DNS_SERVER_PORT);
+
+ /* free pbuf */
+ pbuf_free(p);
+ } else {
+ err = ERR_MEM;
+ }
+
+ return err;
+}
+
+/**
+ * Call appropriate single or multi version of found callback.
+ *
+ * @param pEntry the pointer to the DNS cache entry
+ * @param error used as a boolean to indicate error
+ */
+static void
+dns_exec_found_callback(struct dns_table_entry *pEntry, err_t err) {
+ if (pEntry->found) {
+ if (pEntry->ismulti) {
+ if (pEntry->numipaddrs == 0 || err) {
+ ((dns_found_callback_multi)(*pEntry->found))(pEntry->name, NULL, 0, pEntry->arg);
+ } else {
+ ((dns_found_callback_multi)(*pEntry->found))(pEntry->name, pEntry->ipaddrs, pEntry->numipaddrs, pEntry->arg);
+ }
+ } else {
+ if (pEntry->numipaddrs == 0 || err) {
+ ((dns_found_callback)(*pEntry->found))(pEntry->name, NULL, pEntry->arg);
+ } else {
+ ((dns_found_callback)(*pEntry->found))(pEntry->name, pEntry->ipaddrs, pEntry->arg);
+ }
+ }
+ }
+}
+
+/**
+ * Generate a new ID for the query, either sequential, or random
+ * depending on options.
+ *
+ * @param i index of the dns_table entry needing the ID
+ */
+
+static bool check_rand(u16_t r, int i)
+{
+ u8_t j;
+ for (j = 0; j < DNS_TABLE_SIZE; ++j) {
+ if( (j != i) && (dns_table[j].state != DNS_STATE_UNUSED)
+ && (dns_table[j].queryID == r) )
+ {
+ return false;
+ }
+ }
+ /* no clashes, its good */
+ return true;
+}
+
+/**
+ *
+ * A few gyrations here, without this, the nested loop
+ * crashes llvm. If the function pointer is not
+ * volatile it still crashes llvm. It looks like the
+ * branch optimiser considers local functions as
+ * fair game. The volatile breaks the link
+ *
+ */
+
+/**
+ * Check that a given ID is not already in use
+ *
+ * @param i index of the dns_table entry this will be used for
+ * @param r random number to check
+ */
+
+typedef bool (*check_fn)(u16_t r, int i);
+static volatile check_fn rand_check = check_rand;
+
+static u16_t new_query_id(int i)
+{
+#if LWIP_DNS_RAND_ID
+
+#if !defined(LWIP_RAND)
+#error "LWIP_RAND must be specified if LWIP_DNS_RAND_ID is on"
+#endif
+
+ u8_t j;
+ u32_t seq = -1, try;
+
+ try = dns_table[i].seqno;
+
+ for(j = 0; j<DNS_MAX_RAND_ATTEMPT; j++)
+ {
+ u16_t r;
+ r = LWIP_RAND();
+ LWIP_DEBUGF(DNS_DEBUG, ("Random ID: 0x%x\n", r));
+ /* This used to be a nested loop, but it crashed llvm */
+ if((*rand_check)(r, i))
+ {
+ /* we found an unused ID */
+ return r;
+ }
+
+ /* This relies on there being at least as many attempts as table entries */
+ if((seq == -1) && (*rand_check)(try, i))
+ {
+ /* we found an unused ID */
+ seq = try;
+ }
+ try++;
+ }
+
+ LWIP_DEBUGF(DNS_DEBUG | LWIP_DBG_LEVEL_SEVERE,
+ ("Too many clashing random IDs, using ID %d\n", seq));
+
+ if(seq != -1)
+ {
+ return seq;
+ }
+ return try;
+ /* could not find a unique random number */
+ /* either bad luck, or broken rand function */
+ /* use sequence number instead */
+#else
+
+ /* If not using random numbers, the */
+ /* sequence number is better than nothing */
+ return dns_table[i].seqno;
+#endif
+}
+
+
+
+/**
+ * dns_check_entry() - see if pEntry has not yet been queried and, if so, sends out a query.
+ * Check an entry in the dns_table:
+ * - send out query for new entries
+ * - retry old pending entries on timeout (also with different servers)
+ * - remove completed entries from the table if their TTL has expired
+ *
+ * @param i index of the dns_table entry to check
+ */
+static void
+dns_check_entry(u8_t i)
+{
+ err_t err;
+ struct dns_table_entry *pEntry = &dns_table[i];
+
+
+ LWIP_ASSERT("array index out of bounds", i < DNS_TABLE_SIZE);
+
+ switch(pEntry->state) {
+
+ case DNS_STATE_NEW: {
+
+ /* initialize new entry */
+
+ pEntry->state = DNS_STATE_ASKING;
+ pEntry->numdns = 0;
+ pEntry->numipaddrs = 0;
+ pEntry->tmr = 1;
+ pEntry->retries = 0;
+
+ pEntry->queryID = new_query_id(i);
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_check_entry: new id: 0x%x\n", pEntry->queryID));
+
+ /* send DNS packet for this entry */
+ err = dns_send(pEntry->numdns, pEntry->name, pEntry->queryID);
+ if (err != ERR_OK) {
+ LWIP_DEBUGF(DNS_DEBUG | LWIP_DBG_LEVEL_WARNING,
+ ("dns_send returned error: %s\n", lwip_strerr(err)));
+ }
+ break;
+ }
+
+ case DNS_STATE_ASKING: {
+ if (--pEntry->tmr == 0) {
+ if (++pEntry->retries == DNS_MAX_RETRIES) {
+ if ((pEntry->numdns+1<DNS_MAX_SERVERS) && !ip_addr_isany(&dns_servers[pEntry->numdns+1])) {
+ /* change of server */
+ pEntry->numdns++;
+ pEntry->tmr = 1;
+ pEntry->retries = 0;
+ break;
+ } else {
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_check_entry: \"%s\": timeout\n", pEntry->name));
+ /* call specified callback function if provided */
+ dns_exec_found_callback(pEntry, ERR_OK);
+ /* flush this entry */
+ pEntry->state = DNS_STATE_UNANSWERED;
+ pEntry->found = NULL;
+ break;
+ }
+ }
+
+ /* wait longer for the next retry */
+ pEntry->tmr = pEntry->retries;
+
+ /* send DNS packet for this entry */
+ err = dns_send(pEntry->numdns, pEntry->name, pEntry->queryID);
+ if (err != ERR_OK) {
+ LWIP_DEBUGF(DNS_DEBUG | LWIP_DBG_LEVEL_WARNING,
+ ("dns_send returned error: %s\n", lwip_strerr(err)));
+ }
+ }
+ break;
+ }
+
+ case DNS_STATE_DONE: {
+ /* if the time to live is nul */
+ if ((pEntry->ttl == 0) || (--pEntry->ttl == 0)) {
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_check_entry: \"%s\": flush\n", pEntry->name));
+ /* flush this entry */
+ pEntry->state = DNS_STATE_UNUSED;
+ pEntry->found = NULL;
+ }
+ break;
+ }
+
+ case DNS_STATE_UNANSWERED:
+ case DNS_STATE_UNUSED:
+ /* nothing to do */
+ break;
+ default:
+ LWIP_ASSERT("unknown dns_table entry state:", 0);
+ break;
+ }
+}
+
+
+/**
+ * Call dns_check_entry for each entry in dns_table - check all entries.
+ */
+static void
+dns_check_entries(void)
+{
+ u8_t i;
+
+ for (i = 0; i < DNS_TABLE_SIZE; ++i) {
+ dns_check_entry(i);
+ }
+}
+
+#if LWIP_TEST_CODE
+u8_t
+dns_expire_asking_entries(void)
+{
+ int j;
+ struct dns_table_entry *pEntry;
+ u8_t num_matched_entries = 0;
+ for (j = 0; j < DNS_TABLE_SIZE; ++j) {
+ pEntry = &dns_table[j];
+ if (pEntry->state == DNS_STATE_ASKING) {
+ num_matched_entries++;
+ pEntry->tmr = 1;
+ pEntry->retries = (DNS_MAX_RETRIES -1);
+ pEntry->numdns = DNS_MAX_SERVERS;
+ }
+ }
+ return num_matched_entries;
+}
+
+u8_t
+dns_flush_cache(void)
+{
+ int j;
+ struct dns_table_entry *pEntry;
+ u8_t num_matched_entries = 0;
+ for (j = 0; j < DNS_TABLE_SIZE; ++j) {
+ pEntry = &dns_table[j];
+ if (pEntry->state == DNS_STATE_DONE) {
+ memset(pEntry, 0, sizeof(struct dns_table_entry));
+ num_matched_entries++;
+ }
+ }
+ return num_matched_entries;
+}
+#endif
+
+/**
+ * Receive input function for DNS response packets arriving for the dns UDP pcb.
+ *
+ * @params see udp.h
+ */
+static void
+dns_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, ip_addr_t *addr, u16_t port)
+{
+ bool was_unanswered = false, found = false;
+ u16_t i, id;
+ char *pHostname;
+ struct dns_hdr *hdr;
+ struct dns_answer ans;
+ struct dns_table_entry *pEntry;
+ u16_t nquestions, nanswers;
+
+ LWIP_UNUSED_ARG(arg);
+ LWIP_UNUSED_ARG(pcb);
+ LWIP_UNUSED_ARG(addr);
+ LWIP_UNUSED_ARG(port);
+
+ /* is the dns message too big ? */
+ if (p->tot_len > DNS_MSG_SIZE) {
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: pbuf too big\n"));
+ /* free pbuf and return */
+ goto out;
+ }
+
+ /* is the dns message big enough ? */
+ if (p->tot_len < (SIZEOF_DNS_HDR + SIZEOF_DNS_QUERY + SIZEOF_DNS_ANSWER)) {
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: pbuf too small\n"));
+ /* free pbuf and return */
+ goto out;
+ }
+
+ /* copy dns payload inside static buffer for processing */
+ if (pbuf_copy_partial(p, dns_payload, p->tot_len, 0) == p->tot_len) {
+ /* The ID in the DNS header should be our entry into the name table. */
+ hdr = (struct dns_hdr*)dns_payload;
+ id = htons(hdr->id);
+ for(i = 0; i < DNS_TABLE_SIZE; i++) {
+ pEntry = &dns_table[i];
+ if(pEntry->queryID != id)
+ continue;
+
+ found = true;
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: found ID: 0x%x @ index: %d\n", id, i));
+ if(pEntry->state == DNS_STATE_UNANSWERED) {
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: late answer, putting in cache\n"));
+ pEntry->state = DNS_STATE_ASKING;
+ was_unanswered = true;
+ }
+ if(pEntry->state == DNS_STATE_ASKING) {
+ /* This entry is now completed. */
+ pEntry->state = DNS_STATE_DONE;
+ pEntry->err = hdr->flags2 & DNS_FLAG2_ERR_MASK;
+
+ /* We only care about the question(s) and the answers. The authrr
+ and the extrarr are simply discarded. */
+ nquestions = htons(hdr->numquestions);
+ nanswers = htons(hdr->numanswers);
+
+ /* Check for error. If so, call callback to inform. */
+ if (((hdr->flags1 & DNS_FLAG1_RESPONSE) == 0) || (pEntry->err != 0) || (nquestions != 1)) {
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: \"%s\": error in flags\n", pEntry->name));
+ /* call callback to indicate error, clean up memory and return */
+ if(!was_unanswered)
+ dns_exec_found_callback(pEntry, pEntry->err ? pEntry->err : ERR_VAL);
+ goto out;
+ }
+
+#if DNS_DOES_NAME_CHECK
+ /* Check if the name in the "question" part match with the name in the entry. */
+ if (dns_compare_name((unsigned char *)(pEntry->name), (unsigned char *)dns_payload + SIZEOF_DNS_HDR) != 0) {
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: \"%s\": response not match to query\n", pEntry->name));
+ /* call callback to indicate error, clean up memory and return */
+ if(!was_unanswered)
+ dns_exec_found_callback(pEntry, ERR_VAL);
+ goto out;
+ }
+#endif /* DNS_DOES_NAME_CHECK */
+
+ /* Skip the name in the "question" part */
+ pHostname = (char *) dns_parse_name((unsigned char *)dns_payload + SIZEOF_DNS_HDR) + SIZEOF_DNS_QUERY;
+
+ pEntry->ttl = DNS_MAX_TTL;
+ pEntry->numipaddrs = 0;
+ while (nanswers > 0 && pEntry->numipaddrs < DNS_MAX_ADDRS_PER_NAME) {
+ /* skip answer resource record's host name */
+ pHostname = (char *) dns_parse_name((unsigned char *)pHostname);
+
+ /* Check for IP address type and Internet class. Others are discarded. */
+ SMEMCPY(&ans, pHostname, SIZEOF_DNS_ANSWER);
+ if((ans.type == PP_HTONS(DNS_RRTYPE_A)) && (ans.cls == PP_HTONS(DNS_RRCLASS_IN)) &&
+ (ans.len == PP_HTONS(sizeof(ip_addr_t))) ) {
+ /* read the answer resource record's TTL, and choose the smallest */
+ if (pEntry->ttl > ntohl(ans.ttl)) {
+ pEntry->ttl = ntohl(ans.ttl);
+ }
+ /* read the IP address after answer resource record's header */
+ SMEMCPY(&(pEntry->ipaddrs[pEntry->numipaddrs]), (pHostname+SIZEOF_DNS_ANSWER), sizeof(ip_addr_t));
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: \"%s\": response = ", pEntry->name));
+ ip_addr_debug_print(DNS_DEBUG, (&(pEntry->ipaddrs[pEntry->numipaddrs])));
+ LWIP_DEBUGF(DNS_DEBUG, ("\n"));
+ pEntry->numipaddrs++;
+ }
+ pHostname = pHostname + SIZEOF_DNS_ANSWER + htons(ans.len);
+ --nanswers;
+ }
+ pEntry->offset = 0;
+ /* call specified callback function if provided */
+ if(!was_unanswered)
+ dns_exec_found_callback(pEntry, ERR_OK);
+ /* invalidate entry if the minimal TTL is zero */
+ if (pEntry->ttl == 0)
+ {
+ pEntry->state = DNS_STATE_UNUSED;
+ pEntry->found = NULL;
+ }
+ }
+ } // for
+ if(!found)
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: response with unknown id: 0x%x\n", id));
+ } // if
+
+out:
+ /* free pbuf */
+ pbuf_free(p);
+ return;
+}
+
+/**
+ * Determines whether a DNS entry can be recycled
+ *
+ * @param entry An entry object to check
+ * @return a boolean representing whether the entry can be recycled.
+ * (0 == DNS entry CANNOT be recycled, 1/nonzero == DNS entry CAN be recycled)
+ */
+static u8_t
+dns_can_recycle_entry(const struct dns_table_entry *pEntry)
+{
+ u8_t result;
+
+ switch(pEntry->state) {
+ case DNS_STATE_DONE:
+ case DNS_STATE_UNANSWERED:
+ result = true;
+ break;
+
+ default:
+ result = false;
+ break;
+ }
+
+ return result;
+}
+
+/**
+ * Queues a new hostname to resolve and sends out a DNS query for that hostname
+ *
+ * @param name the hostname that is to be queried
+ * @param found a callback function to be called on success, failure or timeout
+ * @param callback_arg argument to pass to the callback function
+ * @param ismulti boolean indicating what version of the found callback is passed
+ * (0 == dns_found_callback, 1 == dns_fond_callback_multi)
+ * @return a err_t return code.
+ */
+static err_t
+dns_enqueue(const char *name, dns_found_callbackX found, void *callback_arg, u8_t ismulti)
+{
+ u8_t i;
+ u8_t lseq, lseqi;
+ u8_t age;
+
+ struct dns_table_entry *pEntry = NULL;
+ size_t namelen;
+
+ /* search an unused entry, or the oldest one */
+ lseq = lseqi = 0;
+ for (i = 0; i < DNS_TABLE_SIZE; ++i) {
+ pEntry = &dns_table[i];
+ /* is it an unused entry ? */
+ if (pEntry->state == DNS_STATE_UNUSED)
+ break;
+
+ /* check if this is the oldest completed entry */
+ if (dns_can_recycle_entry(pEntry)) {
+ age = dns_seqno >= pEntry->seqno ?
+ dns_seqno - pEntry->seqno :
+ dns_seqno + (UINT8_MAX - pEntry->seqno);
+ if (age > lseq) {
+ lseq = age;
+ lseqi = i;
+ }
+ }
+ }
+
+ /* if we have not found an unused entry, use the oldest completed one */
+ if (i == DNS_TABLE_SIZE) {
+ if ((lseqi >= DNS_TABLE_SIZE) || !dns_can_recycle_entry(&dns_table[lseqi])) {
+ /* no entry can't be used now, table is full */
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_enqueue: \"%s\": DNS entries table is full\n", name));
+ return ERR_MEM;
+ } else {
+ /* use the oldest completed one */
+ i = lseqi;
+ pEntry = &dns_table[i];
+ }
+ }
+
+ /* use this entry */
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_enqueue: \"%s\": use DNS entry %"U16_F"\n", name, (u16_t)(i)));
+
+
+ /* fill the entry */
+ pEntry->state = DNS_STATE_NEW;
+ pEntry->seqno = dns_seqno++;
+ pEntry->ismulti = ismulti;
+ pEntry->found = found;
+ pEntry->arg = callback_arg;
+
+ namelen = LWIP_MIN(strlen(name), DNS_MAX_NAME_LENGTH-1);
+ MEMCPY(pEntry->name, name, namelen);
+ pEntry->name[namelen] = 0;
+
+ /* force to send query without waiting timer */
+ dns_check_entry(i);
+
+ /* dns query is enqueued */
+ return ERR_INPROGRESS;
+}
+
+/**
+ * Help resolve a hostname (string) into one or more IP addresses.
+ *
+ * Returns immediately with one of err_t return codes:
+ * - ERR_OK if hostname is a valid IP address string or the host
+ * name is already in the local names table.
+ * - ERR_INPROGRESS enqueue a request to be sent to the DNS server
+ * for resolution if no errors are present.
+ * - ERR_ARG: dns client not initialized or invalid hostname
+ *
+ * @param hostname the hostname that is to be queried.
+ * @param ipaddrs pointer to the ip_addr_t array where to store the addresses if they are already
+ * cached in the dns_table (only valid if ERR_OK is returned!)
+ * @param numipaddrs size of the ipaddrs array.
+ * @note This is both an input and an output parameter.
+ * @param found a callback function to be called on success, failure or timeout (only if
+ * ERR_INPROGRESS is returned!)
+ * @param callback_arg argument to pass to the callback function
+ * @return a err_t return code.
+ */
+static err_t
+dns_gethostbyname_internal(const char *hostname, ip_addr_t *ipaddrs, u8_t *numipaddrs,
+ dns_found_callbackX found, void *callback_arg, u8_t ismulti)
+{
+ u32_t tmpipaddr;
+
+ /* not initialized or no valid server yet, or invalid ipaddrs pointer
+ * or invalid hostname or invalid hostname length */
+ if ((dns_pcb == NULL) || (ipaddrs == NULL) || (*numipaddrs == 0) ||
+ (!hostname) || (!hostname[0]) ||
+ (strlen(hostname) >= DNS_MAX_NAME_LENGTH)) {
+ return ERR_ARG;
+ }
+
+#if LWIP_HAVE_LOOPIF
+ if (strcmp(hostname, "localhost")==0) {
+ ip_addr_set_loopback(ipaddrs);
+ *numipaddrs = 1;
+ return ERR_OK;
+ }
+#endif /* LWIP_HAVE_LOOPIF */
+
+ /* host name already in octet notation? set ip addr and return ERR_OK */
+ tmpipaddr = ipaddr_addr(hostname);
+ if (tmpipaddr != IPADDR_NONE) {
+ ip4_addr_set_u32(ipaddrs, tmpipaddr);
+ *numipaddrs = 1;
+ return ERR_OK;
+ }
+ /* already have this address cached? */
+ if (dns_lookup(hostname, ipaddrs, numipaddrs)) {
+ return ERR_OK;
+ }
+
+ /* queue query with specified callback */
+ return dns_enqueue(hostname, found, callback_arg, ismulti);
+}
+
+/**
+ * Resolve a hostname (string) into a single IP address.
+ * NON-BLOCKING callback version for use with raw API!!!
+ *
+ * Returns immediately with one of err_t return codes:
+ * - ERR_OK if hostname is a valid IP address string or the host
+ * name is already in the local names table.
+ * - ERR_INPROGRESS enqueue a request to be sent to the DNS server
+ * for resolution if no errors are present.
+ * - ERR_ARG: dns client not initialized or invalid hostname
+ *
+ * @param hostname the hostname that is to be queried
+ * @param ipaddr pointer to the ip_addr_t where to store the addresses if it is already
+ * cached in the dns_table (only valid if ERR_OK is returned!)
+ * @param found a callback function to be called on success, failure or timeout (only if
+ * ERR_INPROGRESS is returned!)
+ * @param callback_arg argument to pass to the callback function
+ * @return a err_t return code.
+ */
+err_t
+dns_gethostbyname(const char *hostname, ip_addr_t *ipaddr,
+ dns_found_callback found, void *callback_arg)
+{
+ u8_t singleaddr = 1;
+ return dns_gethostbyname_internal(hostname, ipaddr, &singleaddr,
+ (dns_found_callbackX)found, callback_arg, 0);
+}
+
+/**
+ * Resolve a hostname (string) into a set of IP addresses.
+ * NON-BLOCKING callback version for use with raw API!!!
+ *
+ * Returns immediately with one of err_t return codes:
+ * - ERR_OK if hostname is a valid IP address string or the host
+ * name is already in the local names table.
+ * - ERR_INPROGRESS enqueue a request to be sent to the DNS server
+ * for resolution if no errors are present.
+ * - ERR_ARG: dns client not initialized or invalid hostname
+ *
+ * @param hostname the hostname that is to be queried
+ * @param ipaddrs pointer to the ip_addr_t array where to store the addresses if they are already
+ * cached in the dns_table (only valid if ERR_OK is returned!)
+ * @param numipaddrs size of the ipaddrs array
+ * @param found a callback function to be called on success, failure or timeout (only if
+ * ERR_INPROGRESS is returned!)
+ * @param callback_arg argument to pass to the callback function
+ * @return a err_t return code.
+ */
+err_t
+dns_gethostbyname_multi(const char *hostname, ip_addr_t *ipaddrs, u8_t *numipaddrs,
+ dns_found_callback_multi found, void *callback_arg)
+{
+ return dns_gethostbyname_internal(hostname, ipaddrs, numipaddrs,
+ (dns_found_callbackX)found, callback_arg, 1);
+}
+
+/**
+ * Cancel one or more entries from the DNS table.
+ *
+ * All entries in the DNS table that match a certain callback and argument are reset.
+ * This means that after a request to resolve a host name has been sent to a DNS server
+ * but before the response has been received, the caller can cancel
+ * the request and avoid being prompted when the response is finally received.
+ * Of course this function can be used to simply move entries to DNS_STATE_UNUSED.
+ *
+ * @param found the callback executed in case of a cache hit.
+ * @param arg argument passed to the callback.
+ * @return number of entries that have been canceled.
+ */
+u8_t
+dns_cancel(dns_found_callbackX found, void *arg)
+{
+ int j;
+ u8_t num_matched_entries = 0;
+ for (j = 0; j < DNS_TABLE_SIZE; ++j) {
+ if ((dns_table[j].found == found) &&
+ (dns_table[j].arg == arg)) {
+ num_matched_entries++;
+ memset(&dns_table[j], 0, sizeof(struct dns_table_entry));
+// dns_table[j].found = NULL;
+// dns_table[j].arg = NULL;
+ }
+ }
+ return num_matched_entries;
+}
+
+
+
+#endif /* LWIP_DNS */
diff --git a/lwip/src/core/inet_chksum.c b/lwip/src/core/inet_chksum.c
new file mode 100644
index 0000000..8bc42c1
--- /dev/null
+++ b/lwip/src/core/inet_chksum.c
@@ -0,0 +1,545 @@
+/**
+ * @file
+ * Incluse internet checksum functions.
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#include "lwip/inet_chksum.h"
+#include "lwip/def.h"
+
+#include <stddef.h>
+#include <string.h>
+
+/* These are some reference implementations of the checksum algorithm, with the
+ * aim of being simple, correct and fully portable. Checksumming is the
+ * first thing you would want to optimize for your platform. If you create
+ * your own version, link it in and in your cc.h put:
+ *
+ * #define LWIP_CHKSUM <your_checksum_routine>
+ *
+ * Or you can select from the implementations below by defining
+ * LWIP_CHKSUM_ALGORITHM to 1, 2 or 3.
+ */
+
+#ifndef LWIP_CHKSUM
+# define LWIP_CHKSUM lwip_standard_chksum
+# ifndef LWIP_CHKSUM_ALGORITHM
+# define LWIP_CHKSUM_ALGORITHM 2
+# endif
+u16_t lwip_standard_chksum(void *dataptr, int len);
+#endif
+/* If none set: */
+#ifndef LWIP_CHKSUM_ALGORITHM
+# define LWIP_CHKSUM_ALGORITHM 0
+#endif
+
+#if (LWIP_CHKSUM_ALGORITHM == 1) /* Version #1 */
+/**
+ * lwip checksum
+ *
+ * @param dataptr points to start of data to be summed at any boundary
+ * @param len length of data to be summed
+ * @return host order (!) lwip checksum (non-inverted Internet sum)
+ *
+ * @note accumulator size limits summable length to 64k
+ * @note host endianess is irrelevant (p3 RFC1071)
+ */
+u16_t
+lwip_standard_chksum(void *dataptr, u16_t len)
+{
+ u32_t acc;
+ u16_t src;
+ u8_t *octetptr;
+
+ acc = 0;
+ /* dataptr may be at odd or even addresses */
+ octetptr = (u8_t*)dataptr;
+ while (len > 1) {
+ /* declare first octet as most significant
+ thus assume network order, ignoring host order */
+ src = (*octetptr) << 8;
+ octetptr++;
+ /* declare second octet as least significant */
+ src |= (*octetptr);
+ octetptr++;
+ acc += src;
+ len -= 2;
+ }
+ if (len > 0) {
+ /* accumulate remaining octet */
+ src = (*octetptr) << 8;
+ acc += src;
+ }
+ /* add deferred carry bits */
+ acc = (acc >> 16) + (acc & 0x0000ffffUL);
+ if ((acc & 0xffff0000UL) != 0) {
+ acc = (acc >> 16) + (acc & 0x0000ffffUL);
+ }
+ /* This maybe a little confusing: reorder sum using htons()
+ instead of ntohs() since it has a little less call overhead.
+ The caller must invert bits for Internet sum ! */
+ return htons((u16_t)acc);
+}
+#endif
+
+#if (LWIP_CHKSUM_ALGORITHM == 2) /* Alternative version #2 */
+/*
+ * Curt McDowell
+ * Broadcom Corp.
+ * csm@broadcom.com
+ *
+ * IP checksum two bytes at a time with support for
+ * unaligned buffer.
+ * Works for len up to and including 0x20000.
+ * by Curt McDowell, Broadcom Corp. 12/08/2005
+ *
+ * @param dataptr points to start of data to be summed at any boundary
+ * @param len length of data to be summed
+ * @return host order (!) lwip checksum (non-inverted Internet sum)
+ */
+
+u16_t
+lwip_standard_chksum(void *dataptr, int len)
+{
+ u8_t *pb = (u8_t *)dataptr;
+ u16_t *ps, t = 0;
+ u32_t sum = 0;
+ int odd = ((mem_ptr_t)pb & 1);
+
+ /* Get aligned to u16_t */
+ if (odd && len > 0) {
+ ((u8_t *)&t)[1] = *pb++;
+ len--;
+ }
+
+ /* Add the bulk of the data */
+ ps = (u16_t *)(void *)pb;
+ while (len > 1) {
+ sum += *ps++;
+ len -= 2;
+ }
+
+ /* Consume left-over byte, if any */
+ if (len > 0) {
+ ((u8_t *)&t)[0] = *(u8_t *)ps;
+ }
+
+ /* Add end bytes */
+ sum += t;
+
+ /* Fold 32-bit sum to 16 bits
+ calling this twice is propably faster than if statements... */
+ sum = FOLD_U32T(sum);
+ sum = FOLD_U32T(sum);
+
+ /* Swap if alignment was odd */
+ if (odd) {
+ sum = SWAP_BYTES_IN_WORD(sum);
+ }
+
+ return (u16_t)sum;
+}
+#endif
+
+#if (LWIP_CHKSUM_ALGORITHM == 3) /* Alternative version #3 */
+/**
+ * An optimized checksum routine. Basically, it uses loop-unrolling on
+ * the checksum loop, treating the head and tail bytes specially, whereas
+ * the inner loop acts on 8 bytes at a time.
+ *
+ * @arg start of buffer to be checksummed. May be an odd byte address.
+ * @len number of bytes in the buffer to be checksummed.
+ * @return host order (!) lwip checksum (non-inverted Internet sum)
+ *
+ * by Curt McDowell, Broadcom Corp. December 8th, 2005
+ */
+
+u16_t
+lwip_standard_chksum(void *dataptr, int len)
+{
+ u8_t *pb = (u8_t *)dataptr;
+ u16_t *ps, t = 0;
+ u32_t *pl;
+ u32_t sum = 0, tmp;
+ /* starts at odd byte address? */
+ int odd = ((mem_ptr_t)pb & 1);
+
+ if (odd && len > 0) {
+ ((u8_t *)&t)[1] = *pb++;
+ len--;
+ }
+
+ ps = (u16_t *)pb;
+
+ if (((mem_ptr_t)ps & 3) && len > 1) {
+ sum += *ps++;
+ len -= 2;
+ }
+
+ pl = (u32_t *)ps;
+
+ while (len > 7) {
+ tmp = sum + *pl++; /* ping */
+ if (tmp < sum) {
+ tmp++; /* add back carry */
+ }
+
+ sum = tmp + *pl++; /* pong */
+ if (sum < tmp) {
+ sum++; /* add back carry */
+ }
+
+ len -= 8;
+ }
+
+ /* make room in upper bits */
+ sum = FOLD_U32T(sum);
+
+ ps = (u16_t *)pl;
+
+ /* 16-bit aligned word remaining? */
+ while (len > 1) {
+ sum += *ps++;
+ len -= 2;
+ }
+
+ /* dangling tail byte remaining? */
+ if (len > 0) { /* include odd byte */
+ ((u8_t *)&t)[0] = *(u8_t *)ps;
+ }
+
+ sum += t; /* add end bytes */
+
+ /* Fold 32-bit sum to 16 bits
+ calling this twice is propably faster than if statements... */
+ sum = FOLD_U32T(sum);
+ sum = FOLD_U32T(sum);
+
+ if (odd) {
+ sum = SWAP_BYTES_IN_WORD(sum);
+ }
+
+ return (u16_t)sum;
+}
+#endif
+
+/** Parts of the pseudo checksum which are common to IPv4 and IPv6 */
+static u16_t
+inet_cksum_pseudo_base(struct pbuf *p, u8_t proto, u16_t proto_len, u32_t acc)
+{
+ struct pbuf *q;
+ u8_t swapped = 0;
+
+ /* iterate through all pbuf in chain */
+ for(q = p; q != NULL; q = q->next) {
+ LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): checksumming pbuf %p (has next %p) \n",
+ (void *)q, (void *)q->next));
+ acc += LWIP_CHKSUM(q->payload, q->len);
+ /*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): unwrapped lwip_chksum()=%"X32_F" \n", acc));*/
+ /* just executing this next line is probably faster that the if statement needed
+ to check whether we really need to execute it, and does no harm */
+ acc = FOLD_U32T(acc);
+ if (q->len % 2 != 0) {
+ swapped = 1 - swapped;
+ acc = SWAP_BYTES_IN_WORD(acc);
+ }
+ /*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): wrapped lwip_chksum()=%"X32_F" \n", acc));*/
+ }
+
+ if (swapped) {
+ acc = SWAP_BYTES_IN_WORD(acc);
+ }
+
+ acc += (u32_t)htons((u16_t)proto);
+ acc += (u32_t)htons(proto_len);
+
+ /* Fold 32-bit sum to 16 bits
+ calling this twice is propably faster than if statements... */
+ acc = FOLD_U32T(acc);
+ acc = FOLD_U32T(acc);
+ LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): pbuf chain lwip_chksum()=%"X32_F"\n", acc));
+ return (u16_t)~(acc & 0xffffUL);
+}
+
+/* inet_chksum_pseudo:
+ *
+ * Calculates the pseudo Internet checksum used by TCP and UDP for a pbuf chain.
+ * IP addresses are expected to be in network byte order.
+ *
+ * @param p chain of pbufs over that a checksum should be calculated (ip data part)
+ * @param src source ip address (used for checksum of pseudo header)
+ * @param dst destination ip address (used for checksum of pseudo header)
+ * @param proto ip protocol (used for checksum of pseudo header)
+ * @param proto_len length of the ip data part (used for checksum of pseudo header)
+ * @return checksum (as u16_t) to be saved directly in the protocol header
+ */
+u16_t
+inet_chksum_pseudo(struct pbuf *p, u8_t proto, u16_t proto_len,
+ ip_addr_t *src, ip_addr_t *dest)
+{
+ u32_t acc;
+ u32_t addr;
+
+ addr = ip4_addr_get_u32(src);
+ acc = (addr & 0xffffUL);
+ acc += ((addr >> 16) & 0xffffUL);
+ addr = ip4_addr_get_u32(dest);
+ acc += (addr & 0xffffUL);
+ acc += ((addr >> 16) & 0xffffUL);
+ /* fold down to 16 bits */
+ acc = FOLD_U32T(acc);
+ acc = FOLD_U32T(acc);
+
+ return inet_cksum_pseudo_base(p, proto, proto_len, acc);
+}
+#if LWIP_IPV6
