1 /* 2 * Copyright 2006-2020, Haiku, Inc. All rights reserved. 3 * Distributed under the terms of the MIT License. 4 */ 5 6 /* 7 * Portions Copyright (C) 2004, 2005, 2008, 2009 Internet Systems Consortium, Inc. ("ISC") 8 * Portions Copyright (C) 1996-2003 Internet Software Consortium. 9 * 10 * Permission to use, copy, modify, and distribute this software for any 11 * purpose with or without fee is hereby granted, provided that the above 12 * copyright notice and this permission notice appear in all copies. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS 15 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE 17 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 18 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 19 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 20 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 21 * SOFTWARE. 22 */ 23 24 /* 25 * Copyright (c) 1983, 1989, 1993 26 * The Regents of the University of California. All rights reserved. 27 * 28 * Redistribution and use in source and binary forms, with or without 29 * modification, are permitted provided that the following conditions 30 * are met: 31 * 1. Redistributions of source code must retain the above copyright 32 * notice, this list of conditions and the following disclaimer. 33 * 2. Redistributions in binary form must reproduce the above copyright 34 * notice, this list of conditions and the following disclaimer in the 35 * documentation and/or other materials provided with the distribution. 36 * 3. Neither the name of the University nor the names of its contributors 37 * may be used to endorse or promote products derived from this software 38 * without specific prior written permission. 39 * 40 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 */ 52 #ifndef _ARPA_NAMESER_H_ 53 #define _ARPA_NAMESER_H_ 54 55 #include <sys/types.h> 56 57 #ifdef __cplusplus 58 extern "C" { 59 #endif 60 61 /* 62 * Define constants based on RFC 883, RFC 1034, RFC 1035 63 */ 64 #define NS_PACKETSZ 512 /* default UDP packet size */ 65 #define NS_MAXDNAME 1025 /* maximum domain name */ 66 #define NS_MAXMSG 65535 /* maximum message size */ 67 #define NS_MAXCDNAME 255 /* maximum compressed domain name */ 68 #define NS_MAXLABEL 63 /* maximum length of domain label */ 69 #define NS_MAXLABELS 128 /* theoretical max #/labels per domain name */ 70 #define NS_MAXNNAME 256 /* maximum uncompressed (binary) domain name */ 71 #define NS_MAXPADDR 40 72 #define NS_HFIXEDSZ 12 /* #/bytes of fixed data in header */ 73 #define NS_QFIXEDSZ 4 /* #/bytes of fixed data in query */ 74 #define NS_RRFIXEDSZ 10 /* #/bytes of fixed data in r record */ 75 #define NS_INT32SZ 4 /* #/bytes of data in a uint32_t */ 76 #define NS_INT16SZ 2 /* #/bytes of data in a uint16_t */ 77 #define NS_INT8SZ 1 /* #/bytes of data in a uint8_t */ 78 #define NS_INADDRSZ 4 /* IPv4 T_A */ 79 #define NS_IN6ADDRSZ 16 /* IPv6 T_AAAA */ 80 #define NS_CMPRSFLGS 0xc0 /* Flag bits indicating name compression. */ 81 #define NS_DEFAULTPORT 53 /* For both TCP and UDP. */ 82 83 /* 84 * These can be expanded with synonyms, just keep ns_parse.c:ns_parserecord() 85 * in synch with it. 86 */ 87 typedef enum __ns_sect { 88 ns_s_qd = 0, /* Query: Question. */ 89 ns_s_zn = 0, /* Update: Zone. */ 90 ns_s_an = 1, /* Query: Answer. */ 91 ns_s_pr = 1, /* Update: Prerequisites. */ 92 ns_s_ns = 2, /* Query: Name servers. */ 93 ns_s_ud = 2, /* Update: Update. */ 94 ns_s_ar = 3, /* Query|Update: Additional records. */ 95 ns_s_max = 4 96 } ns_sect; 97 98 /* 99 * Network name (compressed or not) type. Equivalent to a pointer when used 100 * in a function prototype. Can be const'd. 101 */ 102 typedef unsigned char ns_nname[NS_MAXNNAME]; 103 typedef const unsigned char *ns_nname_ct; 104 typedef unsigned char *ns_nname_t; 105 106 struct ns_namemap { ns_nname_ct base; int len; }; 107 typedef struct ns_namemap *ns_namemap_t; 108 typedef const struct ns_namemap *ns_namemap_ct; 109 110 /* 111 * This is a message handle. It is caller allocated and has no dynamic data. 112 * This structure is intended to be opaque to all but ns_parse.c, thus the 113 * leading _'s on the member names. Use the accessor functions, not the _'s. 114 */ 115 typedef struct __ns_msg { 116 const unsigned char *_msg; 117 const unsigned char *_eom; 118 uint16_t _id; 119 uint16_t _flags; 120 uint16_t _counts[ns_s_max]; 121 const unsigned char *_sections[ns_s_max]; 122 ns_sect _sect; 123 int _rrnum; 124 const unsigned char *_msg_ptr; 125 } ns_msg; 126 127 /* 128 * This is a newmsg handle, used when constructing new messages with 129 * ns_newmsg_init(), et al. 130 */ 131 struct ns_newmsg { 132 ns_msg msg; 133 const unsigned char *dnptrs[25]; 134 const unsigned char **lastdnptr; 135 }; 136 typedef struct ns_newmsg ns_newmsg; 137 138 /* Accessor macros - this is part of the public interface. */ 139 #define ns_msg_id(handle) ((handle)._id + 0) 140 #define ns_msg_base(handle) ((handle)._msg + 0) 141 #define ns_msg_end(handle) ((handle)._eom + 0) 142 #define ns_msg_size(handle) ((handle)._eom - (handle)._msg) 143 #define ns_msg_count(handle, section) ((handle)._counts[section] + 0) 144 145 /* This is a parsed record. It is caller allocated and has no dynamic data. */ 146 typedef struct __ns_rr { 147 char name[NS_MAXDNAME]; 148 uint16_t type; 149 uint16_t rr_class; 150 uint32_t ttl; 151 uint16_t rdlength; 152 const unsigned char *rdata; 153 } ns_rr; 154 155 /* Same thing, but using uncompressed network binary names, and real C types. */ 156 typedef struct __ns_rr2 { 157 ns_nname nname; 158 size_t nnamel; 159 int type; 160 int rr_class; 161 unsigned int ttl; 162 int rdlength; 163 const unsigned char *rdata; 164 } ns_rr2; 165 166 /* Accessor macros - this is part of the public interface. */ 167 #define ns_rr_name(rr) (((rr).name[0] != '\0') ? (rr).name : ".") 168 #define ns_rr_nname(rr) ((const ns_nname_t)(rr).nname) 169 #define ns_rr_nnamel(rr) ((rr).nnamel + 0) 170 #define ns_rr_type(rr) ((ns_type)((rr).type + 0)) 171 #define ns_rr_class(rr) ((ns_class)((rr).rr_class + 0)) 172 #define ns_rr_ttl(rr) ((rr).ttl + 0) 173 #define ns_rr_rdlen(rr) ((rr).rdlength + 0) 174 #define ns_rr_rdata(rr) ((rr).rdata + 0) 175 176 /* 177 * These don't have to be in the same order as in the packet flags word, 178 * and they can even overlap in some cases, but they will need to be kept 179 * in synch with ns_parse.c:ns_flagdata[]. 180 */ 181 typedef enum __ns_flag { 182 ns_f_qr, /* Question/Response. */ 183 ns_f_opcode, /* Operation code. */ 184 ns_f_aa, /* Authoritative Answer. */ 185 ns_f_tc, /* Truncation occurred. */ 186 ns_f_rd, /* Recursion Desired. */ 187 ns_f_ra, /* Recursion Available. */ 188 ns_f_z, /* MBZ. */ 189 ns_f_ad, /* Authentic Data (DNSSEC). */ 190 ns_f_cd, /* Checking Disabled (DNSSEC). */ 191 ns_f_rcode, /* Response code. */ 192 ns_f_max 193 } ns_flag; 194 195 /* Currently defined opcodes. */ 196 typedef enum __ns_opcode { 197 ns_o_query = 0, /* Standard query. */ 198 ns_o_iquery = 1, /* Inverse query (deprecated/unsupported). */ 199 ns_o_status = 2, /* Name server status query (unsupported). */ 200 /* Opcode 3 is undefined/reserved. */ 201 ns_o_notify = 4, /* Zone change notification. */ 202 ns_o_update = 5, /* Zone update message. */ 203 ns_o_max = 6 204 } ns_opcode; 205 206 /* Currently defined response codes. */ 207 typedef enum __ns_rcode { 208 ns_r_noerror = 0, /* No error occurred. */ 209 ns_r_formerr = 1, /* Format error. */ 210 ns_r_servfail = 2, /* Server failure. */ 211 ns_r_nxdomain = 3, /* Name error. */ 212 ns_r_notimpl = 4, /* Unimplemented. */ 213 ns_r_refused = 5, /* Operation refused. */ 214 215 /* these are for BIND_UPDATE */ 216 ns_r_yxdomain = 6, /* Name exists */ 217 ns_r_yxrrset = 7, /* RRset exists */ 218 ns_r_nxrrset = 8, /* RRset does not exist */ 219 ns_r_notauth = 9, /* Not authoritative for zone */ 220 ns_r_notzone = 10, /* Zone of record different from zone section */ 221 ns_r_max = 11, 222 223 /* The following are EDNS extended rcodes */ 224 ns_r_badvers = 16, 225 226 /* The following are TSIG errors */ 227 ns_r_badsig = 16, 228 ns_r_badkey = 17, 229 ns_r_badtime = 18 230 } ns_rcode; 231 232 /* BIND_UPDATE */ 233 typedef enum __ns_update_operation { 234 ns_uop_delete = 0, 235 ns_uop_add = 1, 236 ns_uop_max = 2 237 } ns_update_operation; 238 239 /* This structure is used for TSIG authenticated messages */ 240 struct ns_tsig_key { 241 char name[NS_MAXDNAME]; 242 char alg[NS_MAXDNAME]; 243 unsigned char *data; 244 int len; 245 }; 246 typedef struct ns_tsig_key ns_tsig_key; 247 248 /* This structure is used for TSIG authenticated TCP messages */ 249 struct ns_tcp_tsig_state { 250 int counter; 251 struct dst_key *key; 252 void *ctx; 253 unsigned char sig[NS_PACKETSZ]; 254 int siglen; 255 }; 256 typedef struct ns_tcp_tsig_state ns_tcp_tsig_state; 257 258 #define NS_TSIG_FUDGE 300 259 #define NS_TSIG_TCP_COUNT 100 260 #define NS_TSIG_ALG_HMAC_MD5 "HMAC-MD5.SIG-ALG.REG.INT" 261 262 #define NS_TSIG_ERROR_NO_TSIG -10 263 #define NS_TSIG_ERROR_NO_SPACE -11 264 #define NS_TSIG_ERROR_FORMERR -12 265 266 /* Currently defined type values for resources and queries. */ 267 typedef enum __ns_type { 268 ns_t_invalid = 0, /* Cookie. */ 269 ns_t_a = 1, /* Host address. */ 270 ns_t_ns = 2, /* Authoritative server. */ 271 ns_t_md = 3, /* Mail destination. */ 272 ns_t_mf = 4, /* Mail forwarder. */ 273 ns_t_cname = 5, /* Canonical name. */ 274 ns_t_soa = 6, /* Start of authority zone. */ 275 ns_t_mb = 7, /* Mailbox domain name. */ 276 ns_t_mg = 8, /* Mail group member. */ 277 ns_t_mr = 9, /* Mail rename name. */ 278 ns_t_null = 10, /* Null resource record. */ 279 ns_t_wks = 11, /* Well known service. */ 280 ns_t_ptr = 12, /* Domain name pointer. */ 281 ns_t_hinfo = 13, /* Host information. */ 282 ns_t_minfo = 14, /* Mailbox information. */ 283 ns_t_mx = 15, /* Mail routing information. */ 284 ns_t_txt = 16, /* Text strings. */ 285 ns_t_rp = 17, /* Responsible person. */ 286 ns_t_afsdb = 18, /* AFS cell database. */ 287 ns_t_x25 = 19, /* X_25 calling address. */ 288 ns_t_isdn = 20, /* ISDN calling address. */ 289 ns_t_rt = 21, /* Router. */ 290 ns_t_nsap = 22, /* NSAP address. */ 291 ns_t_nsap_ptr = 23, /* Reverse NSAP lookup (deprecated). */ 292 ns_t_sig = 24, /* Security signature. */ 293 ns_t_key = 25, /* Security key. */ 294 ns_t_px = 26, /* X.400 mail mapping. */ 295 ns_t_gpos = 27, /* Geographical position (withdrawn). */ 296 ns_t_aaaa = 28, /* Ip6 Address. */ 297 ns_t_loc = 29, /* Location Information. */ 298 ns_t_nxt = 30, /* Next domain (security). */ 299 ns_t_eid = 31, /* Endpoint identifier. */ 300 ns_t_nimloc = 32, /* Nimrod Locator. */ 301 ns_t_srv = 33, /* Server Selection. */ 302 ns_t_atma = 34, /* ATM Address */ 303 ns_t_naptr = 35, /* Naming Authority PoinTeR */ 304 ns_t_kx = 36, /* Key Exchange */ 305 ns_t_cert = 37, /* Certification record */ 306 ns_t_a6 = 38, /* IPv6 address (deprecates AAAA) */ 307 ns_t_dname = 39, /* Non-terminal DNAME (for IPv6) */ 308 ns_t_sink = 40, /* Kitchen sink (experimentatl) */ 309 ns_t_opt = 41, /* EDNS0 option (meta-RR) */ 310 ns_t_apl = 42, /* Address prefix list (RFC 3123) */ 311 ns_t_ds = 43, /* Delegation Signer */ 312 ns_t_sshfp = 44, /* SSH Fingerprint */ 313 ns_t_ipseckey = 45, /* IPSEC Key */ 314 ns_t_rrsig = 46, /* RRset Signature */ 315 ns_t_nsec = 47, /* Negative security */ 316 ns_t_dnskey = 48, /* DNS Key */ 317 ns_t_dhcid = 49, /* Dynamic host configuratin identifier */ 318 ns_t_nsec3 = 50, /* Negative security type 3 */ 319 ns_t_nsec3param = 51, /* Negative security type 3 parameters */ 320 ns_t_hip = 55, /* Host Identity Protocol */ 321 ns_t_spf = 99, /* Sender Policy Framework */ 322 ns_t_tkey = 249, /* Transaction key */ 323 ns_t_tsig = 250, /* Transaction signature. */ 324 ns_t_ixfr = 251, /* Incremental zone transfer. */ 325 ns_t_axfr = 252, /* Transfer zone of authority. */ 326 ns_t_mailb = 253, /* Transfer mailbox records. */ 327 ns_t_maila = 254, /* Transfer mail agent records. */ 328 ns_t_any = 255, /* Wildcard match. */ 329 ns_t_zxfr = 256, /* BIND-specific, nonstandard. */ 330 ns_t_dlv = 32769, /* DNSSEC look-aside validatation. */ 331 ns_t_max = 65536 332 } ns_type; 333 334 /* Exclusively a QTYPE? (not also an RTYPE) */ 335 #define ns_t_qt_p(t) (ns_t_xfr_p(t) || (t) == ns_t_any || \ 336 (t) == ns_t_mailb || (t) == ns_t_maila) 337 /* Some kind of meta-RR? (not a QTYPE, but also not an RTYPE) */ 338 #define ns_t_mrr_p(t) ((t) == ns_t_tsig || (t) == ns_t_opt) 339 /* Exclusively an RTYPE? (not also a QTYPE or a meta-RR) */ 340 #define ns_t_rr_p(t) (!ns_t_qt_p(t) && !ns_t_mrr_p(t)) 341 #define ns_t_udp_p(t) ((t) != ns_t_axfr && (t) != ns_t_zxfr) 342 #define ns_t_xfr_p(t) ((t) == ns_t_axfr || (t) == ns_t_ixfr || \ 343 (t) == ns_t_zxfr) 344 345 /* Values for class field */ 346 typedef enum __ns_class { 347 ns_c_invalid = 0, /* Cookie. */ 348 ns_c_in = 1, /* Internet. */ 349 ns_c_2 = 2, /* unallocated/unsupported. */ 350 ns_c_chaos = 3, /* MIT Chaos-net. */ 351 ns_c_hs = 4, /* MIT Hesiod. */ 352 353 /* Query class values which do not appear in resource records */ 354 ns_c_none = 254, /* for prereq. sections in update requests */ 355 ns_c_any = 255, /* Wildcard match. */ 356 ns_c_max = 65536 357 } ns_class; 358 359 /* DNSSEC constants. */ 360 361 typedef enum __ns_key_types { 362 ns_kt_rsa = 1, /* key type RSA/MD5 */ 363 ns_kt_dh = 2, /* Diffie Hellman */ 364 ns_kt_dsa = 3, /* Digital Signature Standard (MANDATORY) */ 365 ns_kt_private = 254 /* Private key type starts with OID */ 366 } ns_key_types; 367 368 typedef enum __ns_cert_types { 369 cert_t_pkix = 1, /* PKIX (X.509v3) */ 370 cert_t_spki = 2, /* SPKI */ 371 cert_t_pgp = 3, /* PGP */ 372 cert_t_url = 253, /* URL private type */ 373 cert_t_oid = 254 /* OID private type */ 374 } ns_cert_types; 375 376 /* Flags field of the KEY RR rdata. */ 377 #define NS_KEY_TYPEMASK 0xC000 /* Mask for "type" bits */ 378 #define NS_KEY_TYPE_AUTH_CONF 0x0000 /* Key usable for both */ 379 #define NS_KEY_TYPE_CONF_ONLY 0x8000 /* Key usable for confidentiality */ 380 #define NS_KEY_TYPE_AUTH_ONLY 0x4000 /* Key usable for authentication */ 381 #define NS_KEY_TYPE_NO_KEY 0xC000 /* No key usable for either; no key */ 382 /* The type bits can also be interpreted independently, as single bits: */ 383 #define NS_KEY_NO_AUTH 0x8000 /* Key unusable for authentication */ 384 #define NS_KEY_NO_CONF 0x4000 /* Key unusable for confidentiality */ 385 #define NS_KEY_RESERVED2 0x2000 /* Security is *mandatory* if bit=0 */ 386 #define NS_KEY_EXTENDED_FLAGS 0x1000 /* reserved - must be zero */ 387 #define NS_KEY_RESERVED4 0x0800 /* reserved - must be zero */ 388 #define NS_KEY_RESERVED5 0x0400 /* reserved - must be zero */ 389 #define NS_KEY_NAME_TYPE 0x0300 /* these bits determine the type */ 390 #define NS_KEY_NAME_USER 0x0000 /* key is assoc. with user */ 391 #define NS_KEY_NAME_ENTITY 0x0200 /* key is assoc. with entity eg host */ 392 #define NS_KEY_NAME_ZONE 0x0100 /* key is zone key */ 393 #define NS_KEY_NAME_RESERVED 0x0300 /* reserved meaning */ 394 #define NS_KEY_RESERVED8 0x0080 /* reserved - must be zero */ 395 #define NS_KEY_RESERVED9 0x0040 /* reserved - must be zero */ 396 #define NS_KEY_RESERVED10 0x0020 /* reserved - must be zero */ 397 #define NS_KEY_RESERVED11 0x0010 /* reserved - must be zero */ 398 #define NS_KEY_SIGNATORYMASK 0x000F /* key can sign RR's of same name */ 399 #define NS_KEY_RESERVED_BITMASK (NS_KEY_RESERVED2 | NS_KEY_RESERVED4 \ 400 | NS_KEY_RESERVED5 | NS_KEY_RESERVED8 | NS_KEY_RESERVED9 \ 401 | NS_KEY_RESERVED10 | NS_KEY_RESERVED11) 402 #define NS_KEY_RESERVED_BITMASK2 0xFFFF /* no bits defined here */ 403 404 /* The Algorithm field of the KEY and SIG RR's is an integer, {1..254} */ 405 #define NS_ALG_MD5RSA 1 /* MD5 with RSA */ 406 #define NS_ALG_DH 2 /* Diffie Hellman KEY */ 407 #define NS_ALG_DSA 3 /* DSA KEY */ 408 #define NS_ALG_DSS NS_ALG_DSA 409 #define NS_ALG_EXPIRE_ONLY 253 /* No alg, no security */ 410 #define NS_ALG_PRIVATE_OID 254 /* Key begins with OID giving alg */ 411 412 /* Protocol values */ 413 /* value 0 is reserved */ 414 #define NS_KEY_PROT_TLS 1 415 #define NS_KEY_PROT_EMAIL 2 416 #define NS_KEY_PROT_DNSSEC 3 417 #define NS_KEY_PROT_IPSEC 4 418 #define NS_KEY_PROT_ANY 255 419 420 /* Signatures */ 421 #define NS_MD5RSA_MIN_BITS 512 /* Size of a mod or exp in bits */ 422 #define NS_MD5RSA_MAX_BITS 4096 423 /* Total of binary mod and exp */ 424 #define NS_MD5RSA_MAX_BYTES ((NS_MD5RSA_MAX_BITS+7/8)*2+3) 425 /* Max length of text sig block */ 426 #define NS_MD5RSA_MAX_BASE64 (((NS_MD5RSA_MAX_BYTES+2)/3)*4) 427 #define NS_MD5RSA_MIN_SIZE ((NS_MD5RSA_MIN_BITS+7)/8) 428 #define NS_MD5RSA_MAX_SIZE ((NS_MD5RSA_MAX_BITS+7)/8) 429 430 #define NS_DSA_SIG_SIZE 41 431 #define NS_DSA_MIN_SIZE 213 432 #define NS_DSA_MAX_BYTES 405 433 434 /* Offsets into SIG record rdata to find various values */ 435 #define NS_SIG_TYPE 0 /* Type flags */ 436 #define NS_SIG_ALG 2 /* Algorithm */ 437 #define NS_SIG_LABELS 3 /* How many labels in name */ 438 #define NS_SIG_OTTL 4 /* Original TTL */ 439 #define NS_SIG_EXPIR 8 /* Expiration time */ 440 #define NS_SIG_SIGNED 12 /* Signature time */ 441 #define NS_SIG_FOOT 16 /* Key footprint */ 442 #define NS_SIG_SIGNER 18 /* Domain name of who signed it */ 443 444 /* How RR types are represented as bit-flags in NXT records */ 445 #define NS_NXT_BITS 8 446 #define NS_NXT_BIT_SET( n,p) (p[(n)/NS_NXT_BITS] |= (0x80>>((n)%NS_NXT_BITS))) 447 #define NS_NXT_BIT_CLEAR(n,p) (p[(n)/NS_NXT_BITS] &= ~(0x80>>((n)%NS_NXT_BITS))) 448 #define NS_NXT_BIT_ISSET(n,p) (p[(n)/NS_NXT_BITS] & (0x80>>((n)%NS_NXT_BITS))) 449 #define NS_NXT_MAX 127 450 451 /* EDNS0 extended flags, host order. */ 452 #define NS_OPT_DNSSEC_OK 0x8000U 453 #define NS_OPT_NSID 3 454 455 /* Inline versions of get/put short/long. Pointer is advanced. */ 456 #define NS_GET16(s, cp) do { \ 457 register const unsigned char *t_cp = (const unsigned char *)(cp); \ 458 (s) = ((uint16_t)t_cp[0] << 8) \ 459 | ((uint16_t)t_cp[1]) \ 460 ; \ 461 (cp) += NS_INT16SZ; \ 462 } while (0) 463 464 #define NS_GET32(l, cp) do { \ 465 register const unsigned char *t_cp = (const unsigned char *)(cp); \ 466 (l) = ((uint32_t)t_cp[0] << 24) \ 467 | ((uint32_t)t_cp[1] << 16) \ 468 | ((uint32_t)t_cp[2] << 8) \ 469 | ((uint32_t)t_cp[3]) \ 470 ; \ 471 (cp) += NS_INT32SZ; \ 472 } while (0) 473 474 #define NS_PUT16(s, cp) do { \ 475 register uint16_t t_s = (uint16_t)(s); \ 476 register unsigned char *t_cp = (unsigned char *)(cp); \ 477 *t_cp++ = t_s >> 8; \ 478 *t_cp = t_s; \ 479 (cp) += NS_INT16SZ; \ 480 } while (0) 481 482 #define NS_PUT32(l, cp) do { \ 483 register uint32_t t_l = (uint32_t)(l); \ 484 register unsigned char *t_cp = (unsigned char *)(cp); \ 485 *t_cp++ = t_l >> 24; \ 486 *t_cp++ = t_l >> 16; \ 487 *t_cp++ = t_l >> 8; \ 488 *t_cp = t_l; \ 489 (cp) += NS_INT32SZ; \ 490 } while (0) 491 492 /* 493 * ANSI C identifier hiding for bind's lib/nameser. 494 */ 495 #define ns_msg_getflag __ns_msg_getflag 496 #define ns_get16 __ns_get16 497 #define ns_get32 __ns_get32 498 #define ns_put16 __ns_put16 499 #define ns_put32 __ns_put32 500 #define ns_initparse __ns_initparse 501 #define ns_skiprr __ns_skiprr 502 #define ns_parserr __ns_parserr 503 #define ns_sprintrr __ns_sprintrr 504 #define ns_sprintrrf __ns_sprintrrf 505 #define ns_format_ttl __ns_format_ttl 506 #define ns_parse_ttl __ns_parse_ttl 507 #define ns_datetosecs __ns_datetosecs 508 #define ns_name_ntol __ns_name_ntol 509 #define ns_name_ntop __ns_name_ntop 510 #define ns_name_pton __ns_name_pton 511 #define ns_name_unpack __ns_name_unpack 512 #define ns_name_pack __ns_name_pack 513 #define ns_name_compress __ns_name_compress 514 #define ns_name_uncompress __ns_name_uncompress 515 #define ns_name_skip __ns_name_skip 516 #define ns_name_rollback __ns_name_rollback 517 #define ns_samedomain __ns_samedomain 518 #define ns_subdomain __ns_subdomain 519 #define ns_makecanon __ns_makecanon 520 #define ns_samename __ns_samename 521 522 #define ns_name_length __ns_name_length 523 #define ns_name_eq __ns_name_eq 524 #define ns_name_owned __ns_name_owned 525 #define ns_name_map __ns_name_map 526 #define ns_name_labels __ns_name_labels 527 #define ns_newmsg_init __ns_newmsg_init 528 #define ns_newmsg_copy __ns_newmsg_copy 529 #define ns_newmsg_id __ns_newmsg_id 530 #define ns_newmsg_flag __ns_newmsg_flag 531 #define ns_newmsg_q __ns_newmsg_q 532 #define ns_newmsg_rr __ns_newmsg_rr 533 #define ns_newmsg_done __ns_newmsg_done 534 #define ns_rdata_unpack __ns_rdata_unpack 535 #define ns_rdata_equal __ns_rdata_equal 536 #define ns_rdata_refers __ns_rdata_refers 537 538 int ns_msg_getflag(ns_msg, int); 539 uint16_t ns_get16(const unsigned char *); 540 uint32_t ns_get32(const unsigned char *); 541 void ns_put16(uint16_t, unsigned char *); 542 void ns_put32(uint32_t, unsigned char *); 543 int ns_initparse(const unsigned char *, int, ns_msg *); 544 int ns_skiprr(const unsigned char *, const unsigned char *, ns_sect, int); 545 int ns_parserr(ns_msg *, ns_sect, int, ns_rr *); 546 int ns_sprintrr(const ns_msg *, const ns_rr *, 547 const char *, const char *, char *, size_t); 548 int ns_sprintrrf(const unsigned char *, size_t, const char *, 549 ns_class, ns_type, unsigned long, const unsigned char *, 550 size_t, const char *, const char *, 551 char *, size_t); 552 int ns_format_ttl(unsigned long, char *, size_t); 553 int ns_parse_ttl(const char *, unsigned long *); 554 uint32_t ns_datetosecs(const char *cp, int *errp); 555 int ns_name_ntol(const unsigned char *, unsigned char *, size_t); 556 int ns_name_ntop(const unsigned char *, char *, size_t); 557 int ns_name_pton(const char *, unsigned char *, size_t); 558 int ns_name_unpack(const unsigned char *, const unsigned char *, 559 const unsigned char *, unsigned char *, size_t); 560 int ns_name_pack(const unsigned char *, unsigned char *, int, 561 const unsigned char **, const unsigned char **); 562 int ns_name_uncompress(const unsigned char *, const unsigned char *, 563 const unsigned char *, char *, size_t); 564 int ns_name_compress(const char *, unsigned char *, size_t, 565 const unsigned char **, const unsigned char **); 566 int ns_name_skip(const unsigned char **, const unsigned char *); 567 void ns_name_rollback(const unsigned char *, const unsigned char **, 568 const unsigned char **); 569 int ns_samedomain(const char *, const char *); 570 int ns_subdomain(const char *, const char *); 571 int ns_makecanon(const char *, char *, size_t); 572 int ns_samename(const char *, const char *); 573 574 ssize_t ns_name_length(ns_nname_ct nname, size_t nameSize); 575 int ns_name_eq(ns_nname_ct a, size_t aLength, ns_nname_ct b, 576 size_t bLength); 577 int ns_name_owned(ns_namemap_ct a, int aLength, ns_namemap_ct b, 578 int bLength); 579 int ns_name_map(ns_nname_ct nname, size_t nameLength, ns_namemap_t map, 580 int mapSize); 581 int ns_name_labels(ns_nname_ct, size_t); 582 int ns_newmsg_init(unsigned char *buffer, size_t bufsiz, ns_newmsg *); 583 int ns_newmsg_copy(ns_newmsg *, ns_msg *); 584 void ns_newmsg_id(ns_newmsg *handle, uint16_t id); 585 void ns_newmsg_flag(ns_newmsg *handle, ns_flag flag, unsigned int value); 586 int ns_newmsg_q(ns_newmsg *handle, ns_nname_ct qname, ns_type qtype, 587 ns_class qclass); 588 int ns_newmsg_rr(ns_newmsg *handle, ns_sect sect, ns_nname_ct name, 589 ns_type type, ns_class rr_class, uint32_t ttl, uint16_t rdlen, 590 const unsigned char *rdata); 591 size_t ns_newmsg_done(ns_newmsg *handle); 592 ssize_t ns_rdata_unpack(const unsigned char *, const unsigned char *, ns_type, 593 const unsigned char *, size_t, unsigned char *, size_t); 594 int ns_rdata_equal(ns_type, const unsigned char *, size_t, 595 const unsigned char *, size_t); 596 int ns_rdata_refers(ns_type, const unsigned char *, size_t, 597 const unsigned char *); 598 599 #ifdef __cplusplus 600 } 601 #endif 602 603 #include <arpa/nameser_compat.h> 604 605 #endif /* _ARPA_NAMESER_H_ */ 606