1/* 2 * Copyright (c) 1995 - 2002 Kungliga Tekniska Högskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34/* $Id$ */ 35 36#ifndef __RESOLVE_H__ 37#define __RESOLVE_H__ 38 39#ifndef ROKEN_LIB_FUNCTION 40#ifdef _WIN32 41#define ROKEN_LIB_FUNCTION 42#define ROKEN_LIB_CALL __cdecl 43#else 44#define ROKEN_LIB_FUNCTION 45#define ROKEN_LIB_CALL 46#endif 47#endif 48 49enum { 50 rk_ns_c_in = 1 51}; 52 53enum { 54 rk_ns_t_invalid = 0, /* Cookie. */ 55 rk_ns_t_a = 1, /* Host address. */ 56 rk_ns_t_ns = 2, /* Authoritative server. */ 57 rk_ns_t_md = 3, /* Mail destination. */ 58 rk_ns_t_mf = 4, /* Mail forwarder. */ 59 rk_ns_t_cname = 5, /* Canonical name. */ 60 rk_ns_t_soa = 6, /* Start of authority zone. */ 61 rk_ns_t_mb = 7, /* Mailbox domain name. */ 62 rk_ns_t_mg = 8, /* Mail group member. */ 63 rk_ns_t_mr = 9, /* Mail rename name. */ 64 rk_ns_t_null = 10, /* Null resource record. */ 65 rk_ns_t_wks = 11, /* Well known service. */ 66 rk_ns_t_ptr = 12, /* Domain name pointer. */ 67 rk_ns_t_hinfo = 13, /* Host information. */ 68 rk_ns_t_minfo = 14, /* Mailbox information. */ 69 rk_ns_t_mx = 15, /* Mail routing information. */ 70 rk_ns_t_txt = 16, /* Text strings. */ 71 rk_ns_t_rp = 17, /* Responsible person. */ 72 rk_ns_t_afsdb = 18, /* AFS cell database. */ 73 rk_ns_t_x25 = 19, /* X_25 calling address. */ 74 rk_ns_t_isdn = 20, /* ISDN calling address. */ 75 rk_ns_t_rt = 21, /* Router. */ 76 rk_ns_t_nsap = 22, /* NSAP address. */ 77 rk_ns_t_nsap_ptr = 23, /* Reverse NSAP lookup (deprecated). */ 78 rk_ns_t_sig = 24, /* Security signature. */ 79 rk_ns_t_key = 25, /* Security key. */ 80 rk_ns_t_px = 26, /* X.400 mail mapping. */ 81 rk_ns_t_gpos = 27, /* Geographical position (withdrawn). */ 82 rk_ns_t_aaaa = 28, /* Ip6 Address. */ 83 rk_ns_t_loc = 29, /* Location Information. */ 84 rk_ns_t_nxt = 30, /* Next domain (security). */ 85 rk_ns_t_eid = 31, /* Endpoint identifier. */ 86 rk_ns_t_nimloc = 32, /* Nimrod Locator. */ 87 rk_ns_t_srv = 33, /* Server Selection. */ 88 rk_ns_t_atma = 34, /* ATM Address */ 89 rk_ns_t_naptr = 35, /* Naming Authority PoinTeR */ 90 rk_ns_t_kx = 36, /* Key Exchange */ 91 rk_ns_t_cert = 37, /* Certification record */ 92 rk_ns_t_a6 = 38, /* IPv6 address (deprecates AAAA) */ 93 rk_ns_t_dname = 39, /* Non-terminal DNAME (for IPv6) */ 94 rk_ns_t_sink = 40, /* Kitchen sink (experimentatl) */ 95 rk_ns_t_opt = 41, /* EDNS0 option (meta-RR) */ 96 rk_ns_t_apl = 42, /* Address prefix list (RFC 3123) */ 97 rk_ns_t_ds = 43, /* Delegation Signer (RFC 3658) */ 98 rk_ns_t_sshfp = 44, /* SSH fingerprint */ 99 rk_ns_t_tkey = 249, /* Transaction key */ 100 rk_ns_t_tsig = 250, /* Transaction signature. */ 101 rk_ns_t_ixfr = 251, /* Incremental zone transfer. */ 102 rk_ns_t_axfr = 252, /* Transfer zone of authority. */ 103 rk_ns_t_mailb = 253, /* Transfer mailbox records. */ 104 rk_ns_t_maila = 254, /* Transfer mail agent records. */ 105 rk_ns_t_any = 255, /* Wildcard match. */ 106 rk_ns_t_zxfr = 256, /* BIND-specific, nonstandard. */ 107 rk_ns_t_max = 65536 108}; 109 110#ifndef MAXDNAME 111#define MAXDNAME 1025 112#endif 113 114#define mx_record rk_mx_record 115#define srv_record rk_srv_record 116#define key_record rk_key_record 117#define sig_record rk_sig_record 118#define cert_record rk_cert_record 119#define sshfp_record rk_sshfp_record 120 121struct rk_dns_query{ 122 char *domain; 123 unsigned type; 124 unsigned class; 125}; 126 127struct rk_mx_record{ 128 unsigned preference; 129 char domain[1]; 130}; 131 132struct rk_srv_record{ 133 unsigned priority; 134 unsigned weight; 135 unsigned port; 136 char target[1]; 137}; 138 139struct rk_key_record { 140 unsigned flags; 141 unsigned protocol; 142 unsigned algorithm; 143 size_t key_len; 144 u_char key_data[1]; 145}; 146 147struct rk_sig_record { 148 unsigned type; 149 unsigned algorithm; 150 unsigned labels; 151 unsigned orig_ttl; 152 unsigned sig_expiration; 153 unsigned sig_inception; 154 unsigned key_tag; 155 char *signer; 156 size_t sig_len; 157 char sig_data[1]; /* also includes signer */ 158}; 159 160struct rk_cert_record { 161 unsigned type; 162 unsigned tag; 163 unsigned algorithm; 164 size_t cert_len; 165 u_char cert_data[1]; 166}; 167 168struct rk_sshfp_record { 169 unsigned algorithm; 170 unsigned type; 171 size_t sshfp_len; 172 u_char sshfp_data[1]; 173}; 174 175struct rk_ds_record { 176 unsigned key_tag; 177 unsigned algorithm; 178 unsigned digest_type; 179 size_t digest_len; 180 u_char digest_data[1]; 181}; 182 183struct rk_resource_record{ 184 char *domain; 185 unsigned type; 186 unsigned class; 187 unsigned ttl; 188 unsigned size; 189 union { 190 void *data; 191 struct rk_mx_record *mx; 192 struct rk_mx_record *afsdb; /* mx and afsdb are identical */ 193 struct rk_srv_record *srv; 194 struct in_addr *a; 195 char *txt; 196 struct rk_key_record *key; 197 struct rk_cert_record *cert; 198 struct rk_sig_record *sig; 199 struct rk_sshfp_record *sshfp; 200 struct rk_ds_record *ds; 201 }u; 202 struct rk_resource_record *next; 203}; 204 205#define rk_DNS_MAX_PACKET_SIZE 0xffff 206 207struct rk_dns_header { 208 unsigned id; 209 unsigned flags; 210#define rk_DNS_HEADER_RESPONSE_FLAG 1 211#define rk_DNS_HEADER_AUTHORITIVE_ANSWER 2 212#define rk_DNS_HEADER_TRUNCATED_MESSAGE 4 213#define rk_DNS_HEADER_RECURSION_DESIRED 8 214#define rk_DNS_HEADER_RECURSION_AVAILABLE 16 215#define rk_DNS_HEADER_AUTHENTIC_DATA 32 216#define rk_DNS_HEADER_CHECKING_DISABLED 64 217 unsigned opcode; 218 unsigned response_code; 219 unsigned qdcount; 220 unsigned ancount; 221 unsigned nscount; 222 unsigned arcount; 223}; 224 225struct rk_dns_reply{ 226 struct rk_dns_header h; 227 struct rk_dns_query q; 228 struct rk_resource_record *head; 229}; 230 231 232#ifdef __cplusplus 233extern "C" { 234#endif 235 236ROKEN_LIB_FUNCTION struct rk_dns_reply* ROKEN_LIB_CALL 237 rk_dns_lookup(const char *, const char *); 238ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL 239 rk_dns_free_data(struct rk_dns_reply *); 240ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 241 rk_dns_string_to_type(const char *name); 242ROKEN_LIB_FUNCTION const char * ROKEN_LIB_CALL 243 rk_dns_type_to_string(int type); 244ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL 245 rk_dns_srv_order(struct rk_dns_reply*); 246 247#ifdef __cplusplus 248} 249#endif 250 251#endif /* __RESOLVE_H__ */ 252