1/* 2 * Copyright (c) 1995 - 2002 Kungliga Tekniska H�gskolan 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: resolve.h 14773 2005-04-12 11:29:18Z lha $ */ 35 36#ifndef __RESOLVE_H__ 37#define __RESOLVE_H__ 38 39#ifndef ROKEN_LIB_FUNCTION 40#ifdef _WIN32 41#define ROKEN_LIB_FUNCTION _stdcall 42#else 43#define ROKEN_LIB_FUNCTION 44#endif 45#endif 46 47typedef enum { 48 rk_ns_t_invalid = 0, /* Cookie. */ 49 rk_ns_t_a = 1, /* Host address. */ 50 rk_ns_t_ns = 2, /* Authoritative server. */ 51 rk_ns_t_md = 3, /* Mail destination. */ 52 rk_ns_t_mf = 4, /* Mail forwarder. */ 53 rk_ns_t_cname = 5, /* Canonical name. */ 54 rk_ns_t_soa = 6, /* Start of authority zone. */ 55 rk_ns_t_mb = 7, /* Mailbox domain name. */ 56 rk_ns_t_mg = 8, /* Mail group member. */ 57 rk_ns_t_mr = 9, /* Mail rename name. */ 58 rk_ns_t_null = 10, /* Null resource record. */ 59 rk_ns_t_wks = 11, /* Well known service. */ 60 rk_ns_t_ptr = 12, /* Domain name pointer. */ 61 rk_ns_t_hinfo = 13, /* Host information. */ 62 rk_ns_t_minfo = 14, /* Mailbox information. */ 63 rk_ns_t_mx = 15, /* Mail routing information. */ 64 rk_ns_t_txt = 16, /* Text strings. */ 65 rk_ns_t_rp = 17, /* Responsible person. */ 66 rk_ns_t_afsdb = 18, /* AFS cell database. */ 67 rk_ns_t_x25 = 19, /* X_25 calling address. */ 68 rk_ns_t_isdn = 20, /* ISDN calling address. */ 69 rk_ns_t_rt = 21, /* Router. */ 70 rk_ns_t_nsap = 22, /* NSAP address. */ 71 rk_ns_t_nsap_ptr = 23, /* Reverse NSAP lookup (deprecated). */ 72 rk_ns_t_sig = 24, /* Security signature. */ 73 rk_ns_t_key = 25, /* Security key. */ 74 rk_ns_t_px = 26, /* X.400 mail mapping. */ 75 rk_ns_t_gpos = 27, /* Geographical position (withdrawn). */ 76 rk_ns_t_aaaa = 28, /* Ip6 Address. */ 77 rk_ns_t_loc = 29, /* Location Information. */ 78 rk_ns_t_nxt = 30, /* Next domain (security). */ 79 rk_ns_t_eid = 31, /* Endpoint identifier. */ 80 rk_ns_t_nimloc = 32, /* Nimrod Locator. */ 81 rk_ns_t_srv = 33, /* Server Selection. */ 82 rk_ns_t_atma = 34, /* ATM Address */ 83 rk_ns_t_naptr = 35, /* Naming Authority PoinTeR */ 84 rk_ns_t_kx = 36, /* Key Exchange */ 85 rk_ns_t_cert = 37, /* Certification record */ 86 rk_ns_t_a6 = 38, /* IPv6 address (deprecates AAAA) */ 87 rk_ns_t_dname = 39, /* Non-terminal DNAME (for IPv6) */ 88 rk_ns_t_sink = 40, /* Kitchen sink (experimentatl) */ 89 rk_ns_t_opt = 41, /* EDNS0 option (meta-RR) */ 90 rk_ns_t_apl = 42, /* Address prefix list (RFC 3123) */ 91 rk_ns_t_ds = 43, /* Delegation Signer (RFC 3658) */ 92 rk_ns_t_sshfp = 44, /* SSH fingerprint */ 93 rk_ns_t_tkey = 249, /* Transaction key */ 94 rk_ns_t_tsig = 250, /* Transaction signature. */ 95 rk_ns_t_ixfr = 251, /* Incremental zone transfer. */ 96 rk_ns_t_axfr = 252, /* Transfer zone of authority. */ 97 rk_ns_t_mailb = 253, /* Transfer mailbox records. */ 98 rk_ns_t_maila = 254, /* Transfer mail agent records. */ 99 rk_ns_t_any = 255, /* Wildcard match. */ 100 rk_ns_t_zxfr = 256, /* BIND-specific, nonstandard. */ 101 rk_ns_t_max = 65536 102} rk_ns_type; 103 104/* We use these, but they are not always present in <arpa/nameser.h> */ 105 106#ifndef C_IN 107#define C_IN 1 108#endif 109 110#ifndef T_A 111#define T_A 1 112#endif 113#ifndef T_NS 114#define T_NS 2 115#endif 116#ifndef T_CNAME 117#define T_CNAME 5 118#endif 119#ifndef T_SOA 120#define T_SOA 5 121#endif 122#ifndef T_PTR 123#define T_PTR 12 124#endif 125#ifndef T_MX 126#define T_MX 15 127#endif 128#ifndef T_TXT 129#define T_TXT 16 130#endif 131#ifndef T_AFSDB 132#define T_AFSDB 18 133#endif 134#ifndef T_SIG 135#define T_SIG 24 136#endif 137#ifndef T_KEY 138#define T_KEY 25 139#endif 140#ifndef T_AAAA 141#define T_AAAA 28 142#endif 143#ifndef T_SRV 144#define T_SRV 33 145#endif 146#ifndef T_NAPTR 147#define T_NAPTR 35 148#endif 149#ifndef T_CERT 150#define T_CERT 37 151#endif 152#ifndef T_SSHFP 153#define T_SSHFP 44 154#endif 155 156#ifndef MAXDNAME 157#define MAXDNAME 1025 158#endif 159 160#define dns_query rk_dns_query 161#define mx_record rk_mx_record 162#define srv_record rk_srv_record 163#define key_record rk_key_record 164#define sig_record rk_sig_record 165#define cert_record rk_cert_record 166#define sshfp_record rk_sshfp_record 167#define resource_record rk_resource_record 168#define dns_reply rk_dns_reply 169 170#define dns_lookup rk_dns_lookup 171#define dns_free_data rk_dns_free_data 172#define dns_string_to_type rk_dns_string_to_type 173#define dns_type_to_string rk_dns_type_to_string 174#define dns_srv_order rk_dns_srv_order 175 176struct dns_query{ 177 char *domain; 178 unsigned type; 179 unsigned class; 180}; 181 182struct mx_record{ 183 unsigned preference; 184 char domain[1]; 185}; 186 187struct srv_record{ 188 unsigned priority; 189 unsigned weight; 190 unsigned port; 191 char target[1]; 192}; 193 194struct key_record { 195 unsigned flags; 196 unsigned protocol; 197 unsigned algorithm; 198 size_t key_len; 199 u_char key_data[1]; 200}; 201 202struct sig_record { 203 unsigned type; 204 unsigned algorithm; 205 unsigned labels; 206 unsigned orig_ttl; 207 unsigned sig_expiration; 208 unsigned sig_inception; 209 unsigned key_tag; 210 char *signer; 211 unsigned sig_len; 212 char sig_data[1]; /* also includes signer */ 213}; 214 215struct cert_record { 216 unsigned type; 217 unsigned tag; 218 unsigned algorithm; 219 size_t cert_len; 220 u_char cert_data[1]; 221}; 222 223struct sshfp_record { 224 unsigned algorithm; 225 unsigned type; 226 size_t sshfp_len; 227 u_char sshfp_data[1]; 228}; 229 230struct ds_record { 231 unsigned key_tag; 232 unsigned algorithm; 233 unsigned digest_type; 234 unsigned digest_len; 235 u_char digest_data[1]; 236}; 237 238struct resource_record{ 239 char *domain; 240 unsigned type; 241 unsigned class; 242 unsigned ttl; 243 unsigned size; 244 union { 245 void *data; 246 struct mx_record *mx; 247 struct mx_record *afsdb; /* mx and afsdb are identical */ 248 struct srv_record *srv; 249 struct in_addr *a; 250 char *txt; 251 struct key_record *key; 252 struct cert_record *cert; 253 struct sig_record *sig; 254 struct sshfp_record *sshfp; 255 struct ds_record *ds; 256 }u; 257 struct resource_record *next; 258}; 259 260#define rk_DNS_MAX_PACKET_SIZE 0xffff 261 262struct dns_header { 263 unsigned id; 264 unsigned flags; 265#define rk_DNS_HEADER_RESPONSE_FLAG 1 266#define rk_DNS_HEADER_AUTHORITIVE_ANSWER 2 267#define rk_DNS_HEADER_TRUNCATED_MESSAGE 4 268#define rk_DNS_HEADER_RECURSION_DESIRED 8 269#define rk_DNS_HEADER_RECURSION_AVAILABLE 16 270#define rk_DNS_HEADER_AUTHENTIC_DATA 32 271#define rk_DNS_HEADER_CHECKING_DISABLED 64 272 unsigned opcode; 273 unsigned response_code; 274 unsigned qdcount; 275 unsigned ancount; 276 unsigned nscount; 277 unsigned arcount; 278}; 279 280struct dns_reply{ 281 struct dns_header h; 282 struct dns_query q; 283 struct resource_record *head; 284}; 285 286 287struct dns_reply* ROKEN_LIB_FUNCTION 288 dns_lookup(const char *, const char *); 289void ROKEN_LIB_FUNCTION 290 dns_free_data(struct dns_reply *); 291int ROKEN_LIB_FUNCTION 292 dns_string_to_type(const char *name); 293const char *ROKEN_LIB_FUNCTION 294 dns_type_to_string(int type); 295void ROKEN_LIB_FUNCTION 296 dns_srv_order(struct dns_reply*); 297 298#endif /* __RESOLVE_H__ */ 299