#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 <sys/types.h>
#ifndef _WIN32
#include <stdarg.h> // HPUX needs this in inttypes.h...
#include <inttypes.h>
#else
#include "win32/inttypes.h"
#endif
#include <stddef.h>
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
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