| #ifndef foodnshfoo |
| #define foodnshfoo |
| |
| /*** |
| This file is part of avahi. |
| |
| avahi is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as |
| published by the Free Software Foundation; either version 2.1 of the |
| License, or (at your option) any later version. |
| |
| avahi is distributed in the hope that it will be useful, but WITHOUT |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General |
| Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with avahi; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| USA. |
| ***/ |
| |
| #include "rr.h" |
| #include "hashmap.h" |
| |
| #define AVAHI_DNS_PACKET_HEADER_SIZE 12 |
| #define AVAHI_DNS_PACKET_EXTRA_SIZE 48 |
| #define AVAHI_DNS_LABELS_MAX 127 |
| #define AVAHI_DNS_RDATA_MAX 0xFFFF |
| #define AVAHI_DNS_PACKET_SIZE_MAX (AVAHI_DNS_PACKET_HEADER_SIZE + 256 + 2 + 2 + 4 + 2 + AVAHI_DNS_RDATA_MAX) |
| |
| typedef struct AvahiDnsPacket { |
| size_t size, rindex, max_size; |
| AvahiHashmap *name_table; /* for name compression */ |
| uint8_t *data; |
| } AvahiDnsPacket; |
| |
| #define AVAHI_DNS_PACKET_DATA(p) ((p)->data ? (p)->data : ((uint8_t*) p) + sizeof(AvahiDnsPacket)) |
| |
| AvahiDnsPacket* avahi_dns_packet_new(unsigned mtu); |
| AvahiDnsPacket* avahi_dns_packet_new_query(unsigned mtu); |
| AvahiDnsPacket* avahi_dns_packet_new_response(unsigned mtu, int aa); |
| |
| AvahiDnsPacket* avahi_dns_packet_new_reply(AvahiDnsPacket* p, unsigned mtu, int copy_queries, int aa); |
| |
| void avahi_dns_packet_free(AvahiDnsPacket *p); |
| void avahi_dns_packet_set_field(AvahiDnsPacket *p, unsigned idx, uint16_t v); |
| uint16_t avahi_dns_packet_get_field(AvahiDnsPacket *p, unsigned idx); |
| void avahi_dns_packet_inc_field(AvahiDnsPacket *p, unsigned idx); |
| |
| uint8_t *avahi_dns_packet_extend(AvahiDnsPacket *p, size_t l); |
| |
| void avahi_dns_packet_cleanup_name_table(AvahiDnsPacket *p); |
| |
| uint8_t *avahi_dns_packet_append_uint16(AvahiDnsPacket *p, uint16_t v); |
| uint8_t *avahi_dns_packet_append_uint32(AvahiDnsPacket *p, uint32_t v); |
| uint8_t *avahi_dns_packet_append_name(AvahiDnsPacket *p, const char *name); |
| uint8_t *avahi_dns_packet_append_bytes(AvahiDnsPacket *p, const void *d, size_t l); |
| uint8_t* avahi_dns_packet_append_key(AvahiDnsPacket *p, AvahiKey *k, int unicast_response); |
| uint8_t* avahi_dns_packet_append_record(AvahiDnsPacket *p, AvahiRecord *r, int cache_flush, unsigned max_ttl); |
| uint8_t* avahi_dns_packet_append_string(AvahiDnsPacket *p, const char *s); |
| |
| int avahi_dns_packet_is_query(AvahiDnsPacket *p); |
| int avahi_dns_packet_check_valid(AvahiDnsPacket *p); |
| int avahi_dns_packet_check_valid_multicast(AvahiDnsPacket *p); |
| |
| int avahi_dns_packet_consume_uint16(AvahiDnsPacket *p, uint16_t *ret_v); |
| int avahi_dns_packet_consume_uint32(AvahiDnsPacket *p, uint32_t *ret_v); |
| int avahi_dns_packet_consume_name(AvahiDnsPacket *p, char *ret_name, size_t l); |
| int avahi_dns_packet_consume_bytes(AvahiDnsPacket *p, void* ret_data, size_t l); |
| AvahiKey* avahi_dns_packet_consume_key(AvahiDnsPacket *p, int *ret_unicast_response); |
| AvahiRecord* avahi_dns_packet_consume_record(AvahiDnsPacket *p, int *ret_cache_flush); |
| int avahi_dns_packet_consume_string(AvahiDnsPacket *p, char *ret_string, size_t l); |
| |
| const void* avahi_dns_packet_get_rptr(AvahiDnsPacket *p); |
| |
| int avahi_dns_packet_skip(AvahiDnsPacket *p, size_t length); |
| |
| int avahi_dns_packet_is_empty(AvahiDnsPacket *p); |
| size_t avahi_dns_packet_space(AvahiDnsPacket *p); |
| |
| #define AVAHI_DNS_FIELD_ID 0 |
| #define AVAHI_DNS_FIELD_FLAGS 1 |
| #define AVAHI_DNS_FIELD_QDCOUNT 2 |
| #define AVAHI_DNS_FIELD_ANCOUNT 3 |
| #define AVAHI_DNS_FIELD_NSCOUNT 4 |
| #define AVAHI_DNS_FIELD_ARCOUNT 5 |
| |
| #define AVAHI_DNS_FLAG_QR (1 << 15) |
| #define AVAHI_DNS_FLAG_OPCODE (15 << 11) |
| #define AVAHI_DNS_FLAG_RCODE (15) |
| #define AVAHI_DNS_FLAG_TC (1 << 9) |
| #define AVAHI_DNS_FLAG_AA (1 << 10) |
| |
| #define AVAHI_DNS_FLAGS(qr, opcode, aa, tc, rd, ra, z, ad, cd, rcode) \ |
| (((uint16_t) !!qr << 15) | \ |
| ((uint16_t) (opcode & 15) << 11) | \ |
| ((uint16_t) !!aa << 10) | \ |
| ((uint16_t) !!tc << 9) | \ |
| ((uint16_t) !!rd << 8) | \ |
| ((uint16_t) !!ra << 7) | \ |
| ((uint16_t) !!ad << 5) | \ |
| ((uint16_t) !!cd << 4) | \ |
| ((uint16_t) (rcode & 15))) |
| |
| #define AVAHI_MDNS_SUFFIX_LOCAL "local" |
| #define AVAHI_MDNS_SUFFIX_ADDR_IPV4 "254.169.in-addr.arpa" |
| #define AVAHI_MDNS_SUFFIX_ADDR_IPV6 "0.8.e.f.ip6.arpa" |
| |
| #endif |
| |