| FUTURE |
| |
| * TODO: The lwIP source code makes some invalid assumptions on processor |
| word-length, storage sizes and alignment. See the mailing lists for |
| problems with exoteric (/DSP) architectures showing these problems. |
| We still have to fix some of these issues neatly. |
| |
| * TODO: the ARP layer is not protected against concurrent access. If |
| you run from a multitasking OS, serialize access to ARP (called from |
| your network device driver and from a timeout thread.) |
| |
| * TODO: the PPP code is broken in a few ways. There are namespace |
| collisions on BSD systems and many assumptions on word-length |
| (sizeof(int)). In ppp.c an assumption is made on the availability of |
| a thread subsystem. Either PPP needs to be moved to contrib/ports/??? |
| or rearranged to be more generic. |
| |
| HISTORY |
| |
| (CVS HEAD) |
| |
| * [New changes go here] |
| |
| (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. |
