BLOG | DOCUMENTATION | TRAC |  Home --> Documentations --> PJLIB-UTIL Reference dns.h Go to the documentation of this file. /* $Id: dns.h 3553 2011-05-05 06:14:19Z nanang $ */ /* * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program 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 General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef __PJLIB_UTIL_DNS_H__ #define __PJLIB_UTIL_DNS_H__ #include <pjlib-util/types.h> #include <pj/sock.h> PJ_BEGIN_DECL enum { PJ_DNS_CLASS_IN = 1 }; typedef enum pj_dns_type { PJ_DNS_TYPE_A = 1, PJ_DNS_TYPE_NS = 2, PJ_DNS_TYPE_MD = 3, PJ_DNS_TYPE_MF = 4, PJ_DNS_TYPE_CNAME = 5, PJ_DNS_TYPE_SOA = 6, PJ_DNS_TYPE_MB = 7, PJ_DNS_TYPE_MG = 8, PJ_DNS_TYPE_MR = 9, PJ_DNS_TYPE_NULL = 10, PJ_DNS_TYPE_WKS = 11, PJ_DNS_TYPE_PTR = 12, PJ_DNS_TYPE_HINFO = 13, PJ_DNS_TYPE_MINFO = 14, PJ_DNS_TYPE_MX = 15, PJ_DNS_TYPE_TXT = 16, PJ_DNS_TYPE_RP = 17, PJ_DNS_TYPE_AFSB = 18, PJ_DNS_TYPE_X25 = 19, PJ_DNS_TYPE_ISDN = 20, PJ_DNS_TYPE_RT = 21, PJ_DNS_TYPE_NSAP = 22, PJ_DNS_TYPE_NSAP_PTR= 23, PJ_DNS_TYPE_SIG = 24, PJ_DNS_TYPE_KEY = 25, PJ_DNS_TYPE_PX = 26, PJ_DNS_TYPE_GPOS = 27, PJ_DNS_TYPE_AAAA = 28, PJ_DNS_TYPE_LOC = 29, PJ_DNS_TYPE_NXT = 30, PJ_DNS_TYPE_EID = 31, PJ_DNS_TYPE_NIMLOC = 32, PJ_DNS_TYPE_SRV = 33, PJ_DNS_TYPE_ATMA = 34, PJ_DNS_TYPE_NAPTR = 35, PJ_DNS_TYPE_KX = 36, PJ_DNS_TYPE_CERT = 37, PJ_DNS_TYPE_A6 = 38, PJ_DNS_TYPE_DNAME = 39, PJ_DNS_TYPE_OPT = 41, PJ_DNS_TYPE_APL = 42, PJ_DNS_TYPE_DS = 43, PJ_DNS_TYPE_SSHFP = 44, PJ_DNS_TYPE_IPSECKEY= 45, PJ_DNS_TYPE_RRSIG = 46, PJ_DNS_TYPE_NSEC = 47, PJ_DNS_TYPE_DNSKEY = 48 } pj_dns_type; typedef struct pj_dns_hdr { pj_uint16_t id; pj_uint16_t flags; pj_uint16_t qdcount; pj_uint16_t anscount; pj_uint16_t nscount; pj_uint16_t arcount; } pj_dns_hdr; #define PJ_DNS_SET_RCODE(c) ((pj_uint16_t)((c) & 0x0F)) #define PJ_DNS_SET_RA(on) ((pj_uint16_t)((on) << 7)) #define PJ_DNS_SET_RD(on) ((pj_uint16_t)((on) << 8)) #define PJ_DNS_SET_TC(on) ((pj_uint16_t)((on) << 9)) #define PJ_DNS_SET_AA(on) ((pj_uint16_t)((on) << 10)) #define PJ_DNS_SET_OPCODE(o) ((pj_uint16_t)((o) << 11)) #define PJ_DNS_SET_QR(on) ((pj_uint16_t)((on) << 15)) #define PJ_DNS_GET_RCODE(val) (((val) & PJ_DNS_SET_RCODE(0x0F)) >> 0) #define PJ_DNS_GET_RA(val) (((val) & PJ_DNS_SET_RA(1)) >> 7) #define PJ_DNS_GET_RD(val) (((val) & PJ_DNS_SET_RD(1)) >> 8) #define PJ_DNS_GET_TC(val) (((val) & PJ_DNS_SET_TC(1)) >> 9) #define PJ_DNS_GET_AA(val) (((val) & PJ_DNS_SET_AA(1)) >> 10) #define PJ_DNS_GET_OPCODE(val) (((val) & PJ_DNS_SET_OPCODE(0x0F)) >> 11) #define PJ_DNS_GET_QR(val) (((val) & PJ_DNS_SET_QR(1)) >> 15) typedef enum pj_dns_rcode { PJ_DNS_RCODE_FORMERR = 1, PJ_DNS_RCODE_SERVFAIL = 2, PJ_DNS_RCODE_NXDOMAIN = 3, PJ_DNS_RCODE_NOTIMPL = 4, PJ_DNS_RCODE_REFUSED = 5, PJ_DNS_RCODE_YXDOMAIN = 6, PJ_DNS_RCODE_YXRRSET = 7, PJ_DNS_RCODE_NXRRSET = 8, PJ_DNS_RCODE_NOTAUTH = 9, PJ_DNS_RCODE_NOTZONE = 10 } pj_dns_rcode; typedef struct pj_dns_parsed_query { pj_str_t name; pj_uint16_t type; pj_uint16_t dnsclass; } pj_dns_parsed_query; typedef struct pj_dns_parsed_rr { pj_str_t name; pj_uint16_t type; pj_uint16_t dnsclass; pj_uint32_t ttl; pj_uint16_t rdlength; void *data; union rdata { struct srv { pj_uint16_t prio; pj_uint16_t weight; pj_uint16_t port; pj_str_t target; } srv; struct cname { pj_str_t name; } cname; struct ns { pj_str_t name; } ns; struct ptr { pj_str_t name; } ptr; struct a { pj_in_addr ip_addr; } a; struct aaaa { pj_in6_addr ip_addr; } aaaa; } rdata; } pj_dns_parsed_rr; typedef struct pj_dns_parsed_packet { pj_dns_hdr hdr; pj_dns_parsed_query *q; pj_dns_parsed_rr *ans; pj_dns_parsed_rr *ns; pj_dns_parsed_rr *arr; } pj_dns_parsed_packet; enum pj_dns_dup_options { PJ_DNS_NO_QD = 1, PJ_DNS_NO_ANS = 2, PJ_DNS_NO_NS = 4, PJ_DNS_NO_AR = 8 }; PJ_DECL(pj_status_t) pj_dns_make_query(void *packet, unsigned *size, pj_uint16_t id, int qtype, const pj_str_t *name); PJ_DECL(pj_status_t) pj_dns_parse_packet(pj_pool_t *pool, const void *packet, unsigned size, pj_dns_parsed_packet **p_res); PJ_DECL(void) pj_dns_packet_dup(pj_pool_t *pool, const pj_dns_parsed_packet*p, unsigned options, pj_dns_parsed_packet **p_dst); PJ_DECL(const char *) pj_dns_get_type_name(int type); PJ_DECL(void) pj_dns_init_srv_rr(pj_dns_parsed_rr *rec, const pj_str_t *res_name, unsigned dnsclass, unsigned ttl, unsigned prio, unsigned weight, unsigned port, const pj_str_t *target); PJ_DECL(void) pj_dns_init_cname_rr(pj_dns_parsed_rr *rec, const pj_str_t *res_name, unsigned dnsclass, unsigned ttl, const pj_str_t *name); PJ_DECL(void) pj_dns_init_a_rr(pj_dns_parsed_rr *rec, const pj_str_t *res_name, unsigned dnsclass, unsigned ttl, const pj_in_addr *ip_addr); PJ_DECL(void) pj_dns_dump_packet(const pj_dns_parsed_packet *res); PJ_END_DECL #endif /* __PJLIB_UTIL_DNS_H__ */   PJLIB-UTIL Open Source, small footprint, and portable asynchronous/caching DNS resolver, text scanner, STUN client, and XML library Copyright (C) 2006-2009 Teluu Inc.