#ifndef foodnshfoo #define foodnshfoo /* $Id: dns.h,v 1.1.2.3 2005/10/14 16:23:53 tmh Exp $ */ /*** This file is part of nss-mdns. nss-mdns 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 of the License, or (at your option) any later version. nss-mdns 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 General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with nss-mdns; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. ***/ #include #ifndef _WIN32 #include // HPUX needs this in inttypes.h... #include #else #include "win32/inttypes.h" #endif #include struct dns_packet { size_t size, rindex; uint8_t data[9000]; }; struct ipv4_address_struct_t; struct ipv6_address_struct_t; struct dns_packet* dns_packet_new(void); void dns_packet_free(struct dns_packet *p); void dns_packet_set_field(struct dns_packet *p, unsigned index, uint16_t v); uint16_t dns_packet_get_field(struct dns_packet *p, unsigned index); uint8_t *dns_packet_append_uint16(struct dns_packet *p, uint16_t v); uint8_t *dns_packet_append_uint32(struct dns_packet *p, uint32_t v); uint8_t *dns_packet_append_ipv4(struct dns_packet *p, struct ipv4_address_struct_t *v); uint8_t *dns_packet_append_ipv6(struct dns_packet *p, struct ipv6_address_struct_t *v); uint8_t *dns_packet_append_text(struct dns_packet *p, const char *name); uint8_t *dns_packet_append_name(struct dns_packet *p, const char *name); uint8_t *dns_packet_append_name_compressed(struct dns_packet *p, const char *name, uint8_t *prev); uint8_t *dns_packet_extend(struct dns_packet *p, size_t l); int dns_packet_check_valid_response(struct dns_packet *p); int dns_packet_check_valid_request(struct dns_packet *p); int dns_packet_check_valid(struct dns_packet *p); int dns_packet_consume_name(struct dns_packet *p, char *ret_name, size_t l); int dns_packet_consume_text(struct dns_packet *p, char *ret_name, size_t l); int dns_packet_consume_uint16(struct dns_packet *p, uint16_t *ret_v); int dns_packet_consume_uint32(struct dns_packet *p, uint32_t *ret_v); int dns_packet_consume_bytes(struct dns_packet *p, void *ret_data, size_t l); int dns_packet_consume_seek(struct dns_packet *p, size_t length); #define DNS_TYPE_INVALID 0 // Cookie #define DNS_TYPE_A 1 // Host address #define DNS_TYPE_NS 2 // Authoritative server #define DNS_TYPE_MD 3 // Mail destination #define DNS_TYPE_MF 4 // Mail forwarder #define DNS_TYPE_CNAME 5 // Canonical name #define DNS_TYPE_SOA 6 // Start of authority zone #define DNS_TYPE_MB 7 // Mailbox domain name #define DNS_TYPE_MG 8 // Mail group member #define DNS_TYPE_MR 9 // Mail rename name #define DNS_TYPE_NULL 10 // Null resource record #define DNS_TYPE_WKS 11 // Well known service #define DNS_TYPE_PTR 12 // Domain name pointer #define DNS_TYPE_HINFO 13 // Host information #define DNS_TYPE_MINFO 14 // Mailbox information #define DNS_TYPE_MX 15 // Mail routing information #define DNS_TYPE_TXT 16 // Text strings #define DNS_TYPE_RP 17 // Responsible person #define DNS_TYPE_AFSDB 18 // AFS cell database #define DNS_TYPE_X25 19 // X_25 calling address #define DNS_TYPE_ISDN 20 // ISDN calling address #define DNS_TYPE_RT 21 // Router #define DNS_TYPE_NSAP 22 // NSAP address #define DNS_TYPE_NSAP_PTR 23 // Reverse NSAP lookup (deprecated) #define DNS_TYPE_SIG 24 // Security signature #define DNS_TYPE_KEY 25 // Security key #define DNS_TYPE_PX 26 // X.400 mail mapping #define DNS_TYPE_GPOS 27 // Geographical position (withdrawn) #define DNS_TYPE_AAAA 28 // Ip6 Address #define DNS_TYPE_LOC 29 // Location Information #define DNS_TYPE_NXT 30 // Next domain (security) #define DNS_TYPE_EID 31 // Endpoint identifier #define DNS_TYPE_NIMLOC 32 // Nimrod Locator #define DNS_TYPE_SRV 33 // Server Selection #define DNS_TYPE_ATMA 34 // ATM Address #define DNS_TYPE_NAPTR 35 // Naming Authority PoinTeR #define DNS_TYPE_KX 36 // Key Exchange #define DNS_TYPE_CERT 37 // Certification record #define DNS_TYPE_A6 38 // IPv6 address (deprecates AAAA) #define DNS_TYPE_DNAME 39 // Non-terminal DNAME (for IPv6) #define DNS_TYPE_SINK 40 // Kitchen sink (experimentatl) #define DNS_TYPE_OPT 41 // EDNS0 option (meta-RR) #define DNS_TYPE_TSIG 250 // Transaction signature #define DNS_TYPE_IXFR 251 // Incremental zone transfer #define DNS_TYPE_AXFR 252 // Transfer zone of authority #define DNS_TYPE_MAILB 253 // Transfer mailbox records #define DNS_TYPE_MAILA 254 // Transfer mail agent records #define DNS_TYPE_ANY 255 // Wildcard match #define DNS_CLASS_INVALID 0 // Cookie #define DNS_CLASS_IN 1 // Internet #define DNS_CLASS_2 2 // Unallocated/unsupported #define DNS_CLASS_CHAOS 3 // MIT Chaos-net #define DNS_CLASS_HS 4 // MIT Hesiod #define DNS_CLASS_NONE 254 // For prereq. sections in update request #define DNS_CLASS_ANY 255 // Wildcard match #define DNS_CLASS_FLUSH 0x8000 // Flush #define DNS_FIELD_ID 0 #define DNS_FIELD_FLAGS 1 #define DNS_FIELD_QDCOUNT 2 #define DNS_FIELD_ANCOUNT 3 #define DNS_FIELD_NSCOUNT 4 #define DNS_FIELD_ARCOUNT 5 #define DNS_FLAG_QR (1 << 15) #define DNS_FLAG_OPCODE (15 << 11) #define DNS_FLAG_RCODE (15) #define 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))) #endif