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,v 1.24 2005/04/12 11:29:02 lha Exp $ */ 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 47 typedef 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 175 176 struct dns_query{ 177 char *domain; 178 unsigned type; 179 unsigned class; 180 }; 181 182 struct mx_record{ 183 unsigned preference; 184 char domain[1]; 185 }; 186 187 struct srv_record{ 188 unsigned priority; 189 unsigned weight; 190 unsigned port; 191 char target[1]; 192 }; 193 194 struct key_record { 195 unsigned flags; 196 unsigned protocol; 197 unsigned algorithm; 198 size_t key_len; 199 u_char key_data[1]; 200 }; 201 202 struct 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 }; 214 215 struct cert_record { 216 unsigned type; 217 unsigned tag; 218 unsigned algorithm; 219 size_t cert_len; 220 u_char cert_data[1]; 221 }; 222 223 struct sshfp_record { 224 unsigned algorithm; 225 unsigned type; 226 size_t sshfp_len; 227 u_char sshfp_data[1]; 228 }; 229 230 struct ds_record { 231 unsigned key_tag; 232 unsigned algorithm; 233 unsigned digest_type; 234 unsigned digest_len; 235 u_char digest_data[1]; 236 }; 237 238 struct 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 261 262 struct 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 }; 279 280 struct dns_reply{ 281 struct dns_header h; 282 struct dns_query q; 283 struct resource_record *head; 284 }; 285 286 287 struct dns_reply* ROKEN_LIB_FUNCTION 288 dns_lookup(const char *, const char *); 289 void ROKEN_LIB_FUNCTION 290 dns_free_data(struct dns_reply *); 291 int ROKEN_LIB_FUNCTION 292 dns_string_to_type(const char *name); 293 const char *ROKEN_LIB_FUNCTION 294 dns_type_to_string(int type); 295 void ROKEN_LIB_FUNCTION 296 dns_srv_order(struct dns_reply*); 297 298 #endif /* __RESOLVE_H__ */ 299