1 /*- 2 * SPDX-License-Identifier: (ISC AND BSD-3-Clause) 3 * 4 * Portions Copyright (C) 2004, 2005, 2008, 2009 Internet Systems Consortium, Inc. ("ISC") 5 * Portions Copyright (C) 1996-2003 Internet Software Consortium. 6 * 7 * Permission to use, copy, modify, and/or distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 12 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 13 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 14 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 16 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17 * PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /*- 21 * Copyright (c) 1985 22 * The Regents of the University of California. All rights reserved. 23 * 24 * Redistribution and use in source and binary forms, with or without 25 * modification, are permitted provided that the following conditions 26 * are met: 27 * 1. Redistributions of source code must retain the above copyright 28 * notice, this list of conditions and the following disclaimer. 29 * 2. Redistributions in binary form must reproduce the above copyright 30 * notice, this list of conditions and the following disclaimer in the 31 * documentation and/or other materials provided with the distribution. 32 * 3. Neither the name of the University nor the names of its contributors 33 * may be used to endorse or promote products derived from this software 34 * without specific prior written permission. 35 * 36 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 37 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 39 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 40 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 41 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 42 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 44 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 45 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 46 * SUCH DAMAGE. 47 */ 48 49 /* 50 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 51 * 52 * Permission to use, copy, modify, and distribute this software for any 53 * purpose with or without fee is hereby granted, provided that the above 54 * copyright notice and this permission notice appear in all copies, and that 55 * the name of Digital Equipment Corporation not be used in advertising or 56 * publicity pertaining to distribution of the document or software without 57 * specific, written prior permission. 58 * 59 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 60 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 61 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 62 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 63 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 64 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 65 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 66 * SOFTWARE. 67 */ 68 69 /* 70 * Portions Copyright (c) 1995 by International Business Machines, Inc. 71 * 72 * International Business Machines, Inc. (hereinafter called IBM) grants 73 * permission under its copyrights to use, copy, modify, and distribute this 74 * Software with or without fee, provided that the above copyright notice and 75 * all paragraphs of this notice appear in all copies, and that the name of IBM 76 * not be used in connection with the marketing of any product incorporating 77 * the Software or modifications thereof, without specific, written prior 78 * permission. 79 * 80 * To the extent it has a right to do so, IBM grants an immunity from suit 81 * under its patents, if any, for the use, sale or manufacture of products to 82 * the extent that such products are used for performing Domain Name System 83 * dynamic updates in TCP/IP networks by means of the Software. No immunity is 84 * granted for any product per se or for any other function of any product. 85 * 86 * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES, 87 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 88 * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL, 89 * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING 90 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN 91 * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES. 92 */ 93 94 #include "port_before.h" 95 96 #include <sys/param.h> 97 #include <sys/socket.h> 98 99 #include <netinet/in.h> 100 #include <arpa/inet.h> 101 #include <arpa/nameser.h> 102 103 #include <ctype.h> 104 #include <errno.h> 105 #include <math.h> 106 #include <netdb.h> 107 #include <resolv.h> 108 #include <resolv_mt.h> 109 #include <stdio.h> 110 #include <stdlib.h> 111 #include <string.h> 112 #include <time.h> 113 114 #include "port_after.h" 115 116 #ifdef SPRINTF_CHAR 117 # define SPRINTF(x) strlen(sprintf/**/x) 118 #else 119 # define SPRINTF(x) sprintf x 120 #endif 121 122 extern const char *_res_opcodes[]; 123 extern const char *_res_sectioncodes[]; 124 125 /*% 126 * Print the current options. 127 */ 128 void 129 fp_resstat(const res_state statp, FILE *file) { 130 u_long mask; 131 132 fprintf(file, ";; res options:"); 133 for (mask = 1; mask != 0U; mask <<= 1) 134 if (statp->options & mask) 135 fprintf(file, " %s", p_option(mask)); 136 putc('\n', file); 137 } 138 139 static void 140 do_section(const res_state statp, 141 ns_msg *handle, ns_sect section, 142 int pflag, FILE *file) 143 { 144 int n, sflag, rrnum; 145 static int buflen = 2048; 146 char *buf; 147 ns_opcode opcode; 148 ns_rr rr; 149 150 /* 151 * Print answer records. 152 */ 153 sflag = (statp->pfcode & pflag); 154 if (statp->pfcode && !sflag) 155 return; 156 157 buf = malloc(buflen); 158 if (buf == NULL) { 159 fprintf(file, ";; memory allocation failure\n"); 160 return; 161 } 162 163 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode); 164 rrnum = 0; 165 for (;;) { 166 if (ns_parserr(handle, section, rrnum, &rr)) { 167 if (errno != ENODEV) 168 fprintf(file, ";; ns_parserr: %s\n", 169 strerror(errno)); 170 else if (rrnum > 0 && sflag != 0 && 171 (statp->pfcode & RES_PRF_HEAD1)) 172 putc('\n', file); 173 goto cleanup; 174 } 175 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1)) 176 fprintf(file, ";; %s SECTION:\n", 177 p_section(section, opcode)); 178 if (section == ns_s_qd) 179 fprintf(file, ";;\t%s, type = %s, class = %s\n", 180 ns_rr_name(rr), 181 p_type(ns_rr_type(rr)), 182 p_class(ns_rr_class(rr))); 183 else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) { 184 u_int16_t optcode, optlen, rdatalen = ns_rr_rdlen(rr); 185 u_int32_t ttl = ns_rr_ttl(rr); 186 187 fprintf(file, 188 "; EDNS: version: %u, udp=%u, flags=%04x\n", 189 (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff); 190 191 while (rdatalen >= 4) { 192 const u_char *cp = ns_rr_rdata(rr); 193 int i; 194 195 GETSHORT(optcode, cp); 196 GETSHORT(optlen, cp); 197 198 if (optcode == NS_OPT_NSID) { 199 fputs("; NSID: ", file); 200 if (optlen == 0) { 201 fputs("; NSID\n", file); 202 } else { 203 fputs("; NSID: ", file); 204 for (i = 0; i < optlen; i++) 205 fprintf(file, "%02x ", 206 cp[i]); 207 fputs(" (",file); 208 for (i = 0; i < optlen; i++) 209 fprintf(file, "%c", 210 isprint(cp[i])? 211 cp[i] : '.'); 212 fputs(")\n", file); 213 } 214 } else { 215 if (optlen == 0) { 216 fprintf(file, "; OPT=%u\n", 217 optcode); 218 } else { 219 fprintf(file, "; OPT=%u: ", 220 optcode); 221 for (i = 0; i < optlen; i++) 222 fprintf(file, "%02x ", 223 cp[i]); 224 fputs(" (",file); 225 for (i = 0; i < optlen; i++) 226 fprintf(file, "%c", 227 isprint(cp[i]) ? 228 cp[i] : '.'); 229 fputs(")\n", file); 230 } 231 } 232 rdatalen -= 4 + optlen; 233 } 234 } else { 235 n = ns_sprintrr(handle, &rr, NULL, NULL, 236 buf, buflen); 237 if (n < 0) { 238 if (errno == ENOSPC) { 239 free(buf); 240 buf = NULL; 241 if (buflen < 131072) 242 buf = malloc(buflen += 1024); 243 if (buf == NULL) { 244 fprintf(file, 245 ";; memory allocation failure\n"); 246 return; 247 } 248 continue; 249 } 250 fprintf(file, ";; ns_sprintrr: %s\n", 251 strerror(errno)); 252 goto cleanup; 253 } 254 fputs(buf, file); 255 fputc('\n', file); 256 } 257 rrnum++; 258 } 259 cleanup: 260 if (buf != NULL) 261 free(buf); 262 } 263 264 /*% 265 * Print the contents of a query. 266 * This is intended to be primarily a debugging routine. 267 */ 268 void 269 res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) { 270 ns_msg handle; 271 int qdcount, ancount, nscount, arcount; 272 u_int opcode, rcode, id; 273 274 if (ns_initparse(msg, len, &handle) < 0) { 275 fprintf(file, ";; ns_initparse: %s\n", strerror(errno)); 276 return; 277 } 278 opcode = ns_msg_getflag(handle, ns_f_opcode); 279 rcode = ns_msg_getflag(handle, ns_f_rcode); 280 id = ns_msg_id(handle); 281 qdcount = ns_msg_count(handle, ns_s_qd); 282 ancount = ns_msg_count(handle, ns_s_an); 283 nscount = ns_msg_count(handle, ns_s_ns); 284 arcount = ns_msg_count(handle, ns_s_ar); 285 286 /* 287 * Print header fields. 288 */ 289 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode) 290 fprintf(file, 291 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n", 292 _res_opcodes[opcode], p_rcode(rcode), id); 293 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX)) 294 putc(';', file); 295 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) { 296 fprintf(file, "; flags:"); 297 if (ns_msg_getflag(handle, ns_f_qr)) 298 fprintf(file, " qr"); 299 if (ns_msg_getflag(handle, ns_f_aa)) 300 fprintf(file, " aa"); 301 if (ns_msg_getflag(handle, ns_f_tc)) 302 fprintf(file, " tc"); 303 if (ns_msg_getflag(handle, ns_f_rd)) 304 fprintf(file, " rd"); 305 if (ns_msg_getflag(handle, ns_f_ra)) 306 fprintf(file, " ra"); 307 if (ns_msg_getflag(handle, ns_f_z)) 308 fprintf(file, " ??"); 309 if (ns_msg_getflag(handle, ns_f_ad)) 310 fprintf(file, " ad"); 311 if (ns_msg_getflag(handle, ns_f_cd)) 312 fprintf(file, " cd"); 313 } 314 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) { 315 fprintf(file, "; %s: %d", 316 p_section(ns_s_qd, opcode), qdcount); 317 fprintf(file, ", %s: %d", 318 p_section(ns_s_an, opcode), ancount); 319 fprintf(file, ", %s: %d", 320 p_section(ns_s_ns, opcode), nscount); 321 fprintf(file, ", %s: %d", 322 p_section(ns_s_ar, opcode), arcount); 323 } 324 if ((!statp->pfcode) || (statp->pfcode & 325 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) { 326 putc('\n',file); 327 } 328 /* 329 * Print the various sections. 330 */ 331 do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file); 332 do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file); 333 do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file); 334 do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file); 335 if (qdcount == 0 && ancount == 0 && 336 nscount == 0 && arcount == 0) 337 putc('\n', file); 338 } 339 340 const u_char * 341 p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) { 342 char name[MAXDNAME]; 343 int n; 344 345 if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0) 346 return (NULL); 347 if (name[0] == '\0') 348 putc('.', file); 349 else 350 fputs(name, file); 351 return (cp + n); 352 } 353 354 const u_char * 355 p_cdname(const u_char *cp, const u_char *msg, FILE *file) { 356 return (p_cdnname(cp, msg, PACKETSZ, file)); 357 } 358 359 /*% 360 * Return a fully-qualified domain name from a compressed name (with 361 length supplied). */ 362 363 const u_char * 364 p_fqnname(const u_char *cp, const u_char *msg, int msglen, char *name, 365 int namelen) 366 { 367 int n, newlen; 368 369 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0) 370 return (NULL); 371 newlen = strlen(name); 372 if (newlen == 0 || name[newlen - 1] != '.') { 373 if (newlen + 1 >= namelen) /*%< Lack space for final dot */ 374 return (NULL); 375 else 376 strcpy(name + newlen, "."); 377 } 378 return (cp + n); 379 } 380 381 /* XXX: the rest of these functions need to become length-limited, too. */ 382 383 const u_char * 384 p_fqname(const u_char *cp, const u_char *msg, FILE *file) { 385 char name[MAXDNAME]; 386 const u_char *n; 387 388 n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name); 389 if (n == NULL) 390 return (NULL); 391 fputs(name, file); 392 return (n); 393 } 394 395 /*% 396 * Names of RR classes and qclasses. Classes and qclasses are the same, except 397 * that C_ANY is a qclass but not a class. (You can ask for records of class 398 * C_ANY, but you can't have any records of that class in the database.) 399 */ 400 const struct res_sym __p_class_syms[] = { 401 {C_IN, "IN", (char *)0}, 402 {C_CHAOS, "CH", (char *)0}, 403 {C_CHAOS, "CHAOS", (char *)0}, 404 {C_HS, "HS", (char *)0}, 405 {C_HS, "HESIOD", (char *)0}, 406 {C_ANY, "ANY", (char *)0}, 407 {C_NONE, "NONE", (char *)0}, 408 {C_IN, (char *)0, (char *)0} 409 }; 410 411 /*% 412 * Names of message sections. 413 */ 414 static const struct res_sym __p_default_section_syms[] = { 415 {ns_s_qd, "QUERY", (char *)0}, 416 {ns_s_an, "ANSWER", (char *)0}, 417 {ns_s_ns, "AUTHORITY", (char *)0}, 418 {ns_s_ar, "ADDITIONAL", (char *)0}, 419 {0, (char *)0, (char *)0} 420 }; 421 422 static const struct res_sym __p_update_section_syms[] = { 423 {S_ZONE, "ZONE", (char *)0}, 424 {S_PREREQ, "PREREQUISITE", (char *)0}, 425 {S_UPDATE, "UPDATE", (char *)0}, 426 {S_ADDT, "ADDITIONAL", (char *)0}, 427 {0, (char *)0, (char *)0} 428 }; 429 430 const struct res_sym __p_key_syms[] = { 431 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"}, 432 {NS_ALG_DH, "DH", "Diffie Hellman"}, 433 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"}, 434 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"}, 435 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"}, 436 {0, NULL, NULL} 437 }; 438 439 const struct res_sym __p_cert_syms[] = { 440 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"}, 441 {cert_t_spki, "SPKI", "SPKI certificate"}, 442 {cert_t_pgp, "PGP", "PGP certificate"}, 443 {cert_t_url, "URL", "URL Private"}, 444 {cert_t_oid, "OID", "OID Private"}, 445 {0, NULL, NULL} 446 }; 447 448 /*% 449 * Names of RR types and qtypes. Types and qtypes are the same, except 450 * that T_ANY is a qtype but not a type. (You can ask for records of type 451 * T_ANY, but you can't have any records of that type in the database.) 452 */ 453 const struct res_sym __p_type_syms[] = { 454 {ns_t_a, "A", "address"}, 455 {ns_t_ns, "NS", "name server"}, 456 {ns_t_md, "MD", "mail destination (deprecated)"}, 457 {ns_t_mf, "MF", "mail forwarder (deprecated)"}, 458 {ns_t_cname, "CNAME", "canonical name"}, 459 {ns_t_soa, "SOA", "start of authority"}, 460 {ns_t_mb, "MB", "mailbox"}, 461 {ns_t_mg, "MG", "mail group member"}, 462 {ns_t_mr, "MR", "mail rename"}, 463 {ns_t_null, "NULL", "null"}, 464 {ns_t_wks, "WKS", "well-known service (deprecated)"}, 465 {ns_t_ptr, "PTR", "domain name pointer"}, 466 {ns_t_hinfo, "HINFO", "host information"}, 467 {ns_t_minfo, "MINFO", "mailbox information"}, 468 {ns_t_mx, "MX", "mail exchanger"}, 469 {ns_t_txt, "TXT", "text"}, 470 {ns_t_rp, "RP", "responsible person"}, 471 {ns_t_afsdb, "AFSDB", "DCE or AFS server"}, 472 {ns_t_x25, "X25", "X25 address"}, 473 {ns_t_isdn, "ISDN", "ISDN address"}, 474 {ns_t_rt, "RT", "router"}, 475 {ns_t_nsap, "NSAP", "nsap address"}, 476 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"}, 477 {ns_t_sig, "SIG", "signature"}, 478 {ns_t_key, "KEY", "key"}, 479 {ns_t_px, "PX", "mapping information"}, 480 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"}, 481 {ns_t_aaaa, "AAAA", "IPv6 address"}, 482 {ns_t_loc, "LOC", "location"}, 483 {ns_t_nxt, "NXT", "next valid name (unimplemented)"}, 484 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"}, 485 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"}, 486 {ns_t_srv, "SRV", "server selection"}, 487 {ns_t_atma, "ATMA", "ATM address (unimplemented)"}, 488 {ns_t_naptr, "NAPTR", "naptr"}, 489 {ns_t_kx, "KX", "key exchange"}, 490 {ns_t_cert, "CERT", "certificate"}, 491 {ns_t_a6, "A", "IPv6 address (experminental)"}, 492 {ns_t_dname, "DNAME", "non-terminal redirection"}, 493 {ns_t_opt, "OPT", "opt"}, 494 {ns_t_apl, "apl", "apl"}, 495 {ns_t_ds, "DS", "delegation signer"}, 496 {ns_t_sshfp, "SSFP", "SSH fingerprint"}, 497 {ns_t_ipseckey, "IPSECKEY", "IPSEC key"}, 498 {ns_t_rrsig, "RRSIG", "rrsig"}, 499 {ns_t_nsec, "NSEC", "nsec"}, 500 {ns_t_dnskey, "DNSKEY", "DNS key"}, 501 {ns_t_dhcid, "DHCID", "dynamic host configuration identifier"}, 502 {ns_t_nsec3, "NSEC3", "nsec3"}, 503 {ns_t_nsec3param, "NSEC3PARAM", "NSEC3 parameters"}, 504 {ns_t_hip, "HIP", "host identity protocol"}, 505 {ns_t_spf, "SPF", "sender policy framework"}, 506 {ns_t_tkey, "TKEY", "tkey"}, 507 {ns_t_tsig, "TSIG", "transaction signature"}, 508 {ns_t_ixfr, "IXFR", "incremental zone transfer"}, 509 {ns_t_axfr, "AXFR", "zone transfer"}, 510 {ns_t_zxfr, "ZXFR", "compressed zone transfer"}, 511 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"}, 512 {ns_t_maila, "MAILA", "mail agent (deprecated)"}, 513 {ns_t_naptr, "NAPTR", "URN Naming Authority"}, 514 {ns_t_kx, "KX", "Key Exchange"}, 515 {ns_t_cert, "CERT", "Certificate"}, 516 {ns_t_a6, "A6", "IPv6 Address"}, 517 {ns_t_dname, "DNAME", "dname"}, 518 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"}, 519 {ns_t_opt, "OPT", "EDNS Options"}, 520 {ns_t_any, "ANY", "\"any\""}, 521 {ns_t_dlv, "DLV", "DNSSEC look-aside validation"}, 522 {0, NULL, NULL} 523 }; 524 525 /*% 526 * Names of DNS rcodes. 527 */ 528 const struct res_sym __p_rcode_syms[] = { 529 {ns_r_noerror, "NOERROR", "no error"}, 530 {ns_r_formerr, "FORMERR", "format error"}, 531 {ns_r_servfail, "SERVFAIL", "server failed"}, 532 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"}, 533 {ns_r_notimpl, "NOTIMP", "not implemented"}, 534 {ns_r_refused, "REFUSED", "refused"}, 535 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"}, 536 {ns_r_yxrrset, "YXRRSET", "rrset exists"}, 537 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"}, 538 {ns_r_notauth, "NOTAUTH", "not authoritative"}, 539 {ns_r_notzone, "NOTZONE", "Not in zone"}, 540 {ns_r_max, "", ""}, 541 {ns_r_badsig, "BADSIG", "bad signature"}, 542 {ns_r_badkey, "BADKEY", "bad key"}, 543 {ns_r_badtime, "BADTIME", "bad time"}, 544 {0, NULL, NULL} 545 }; 546 547 int 548 sym_ston(const struct res_sym *syms, const char *name, int *success) { 549 for ((void)NULL; syms->name != 0; syms++) { 550 if (strcasecmp (name, syms->name) == 0) { 551 if (success) 552 *success = 1; 553 return (syms->number); 554 } 555 } 556 if (success) 557 *success = 0; 558 return (syms->number); /*%< The default value. */ 559 } 560 561 const char * 562 sym_ntos(const struct res_sym *syms, int number, int *success) { 563 char *unname = sym_ntos_unname; 564 565 for ((void)NULL; syms->name != 0; syms++) { 566 if (number == syms->number) { 567 if (success) 568 *success = 1; 569 return (syms->name); 570 } 571 } 572 573 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 574 if (success) 575 *success = 0; 576 return (unname); 577 } 578 579 const char * 580 sym_ntop(const struct res_sym *syms, int number, int *success) { 581 char *unname = sym_ntop_unname; 582 583 for ((void)NULL; syms->name != 0; syms++) { 584 if (number == syms->number) { 585 if (success) 586 *success = 1; 587 return (syms->humanname); 588 } 589 } 590 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 591 if (success) 592 *success = 0; 593 return (unname); 594 } 595 596 /*% 597 * Return a string for the type. 598 */ 599 const char * 600 p_type(int type) { 601 int success; 602 const char *result; 603 static char typebuf[20]; 604 605 result = sym_ntos(__p_type_syms, type, &success); 606 if (success) 607 return (result); 608 if (type < 0 || type > 0xffff) 609 return ("BADTYPE"); 610 sprintf(typebuf, "TYPE%d", type); 611 return (typebuf); 612 } 613 614 /*% 615 * Return a string for the type. 616 */ 617 const char * 618 p_section(int section, int opcode) { 619 const struct res_sym *symbols; 620 621 switch (opcode) { 622 case ns_o_update: 623 symbols = __p_update_section_syms; 624 break; 625 default: 626 symbols = __p_default_section_syms; 627 break; 628 } 629 return (sym_ntos(symbols, section, (int *)0)); 630 } 631 632 /*% 633 * Return a mnemonic for class. 634 */ 635 const char * 636 p_class(int class) { 637 int success; 638 const char *result; 639 static char classbuf[20]; 640 641 result = sym_ntos(__p_class_syms, class, &success); 642 if (success) 643 return (result); 644 if (class < 0 || class > 0xffff) 645 return ("BADCLASS"); 646 sprintf(classbuf, "CLASS%d", class); 647 return (classbuf); 648 } 649 650 /*% 651 * Return a mnemonic for an option 652 */ 653 const char * 654 p_option(u_long option) { 655 char *nbuf = p_option_nbuf; 656 657 switch (option) { 658 case RES_INIT: return "init"; 659 case RES_DEBUG: return "debug"; 660 case RES_AAONLY: return "aaonly(unimpl)"; 661 case RES_USEVC: return "usevc"; 662 case RES_PRIMARY: return "primry(unimpl)"; 663 case RES_IGNTC: return "igntc"; 664 case RES_RECURSE: return "recurs"; 665 case RES_DEFNAMES: return "defnam"; 666 case RES_STAYOPEN: return "styopn"; 667 case RES_DNSRCH: return "dnsrch"; 668 case RES_INSECURE1: return "insecure1"; 669 case RES_INSECURE2: return "insecure2"; 670 case RES_NOALIASES: return "noaliases"; 671 case RES_USE_INET6: return "inet6"; 672 #ifdef RES_USE_EDNS0 /*%< KAME extension */ 673 case RES_USE_EDNS0: return "edns0"; 674 case RES_NSID: return "nsid"; 675 #endif 676 #ifdef RES_USE_DNAME 677 case RES_USE_DNAME: return "dname"; 678 #endif 679 #ifdef RES_USE_DNSSEC 680 case RES_USE_DNSSEC: return "dnssec"; 681 #endif 682 #ifdef RES_NOTLDQUERY 683 case RES_NOTLDQUERY: return "no-tld-query"; 684 #endif 685 #ifdef RES_NO_NIBBLE2 686 case RES_NO_NIBBLE2: return "no-nibble2"; 687 #endif 688 /* XXX nonreentrant */ 689 default: sprintf(nbuf, "?0x%lx?", (u_long)option); 690 return (nbuf); 691 } 692 } 693 694 /*% 695 * Return a mnemonic for a time to live. 696 */ 697 const char * 698 p_time(u_int32_t value) { 699 char *nbuf = p_time_nbuf; 700 701 if (ns_format_ttl(value, nbuf, sizeof nbuf) < 0) 702 sprintf(nbuf, "%u", value); 703 return (nbuf); 704 } 705 706 /*% 707 * Return a string for the rcode. 708 */ 709 const char * 710 p_rcode(int rcode) { 711 return (sym_ntos(__p_rcode_syms, rcode, (int *)0)); 712 } 713 714 /*% 715 * Return a string for a res_sockaddr_union. 716 */ 717 const char * 718 p_sockun(union res_sockaddr_union u, char *buf, size_t size) { 719 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"]; 720 721 switch (u.sin.sin_family) { 722 case AF_INET: 723 inet_ntop(AF_INET, &u.sin.sin_addr, ret, sizeof ret); 724 break; 725 #ifdef HAS_INET6_STRUCTS 726 case AF_INET6: 727 inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret); 728 break; 729 #endif 730 default: 731 sprintf(ret, "[af%d]", u.sin.sin_family); 732 break; 733 } 734 if (size > 0U) { 735 strncpy(buf, ret, size - 1); 736 buf[size - 1] = '0'; 737 } 738 return (buf); 739 } 740 741 /*% 742 * routines to convert between on-the-wire RR format and zone file format. 743 * Does not contain conversion to/from decimal degrees; divide or multiply 744 * by 60*60*1000 for that. 745 */ 746 747 static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000, 748 1000000,10000000,100000000,1000000000}; 749 750 /*% takes an XeY precision/size value, returns a string representation. */ 751 static const char * 752 precsize_ntoa(u_int8_t prec) 753 { 754 char *retbuf = precsize_ntoa_retbuf; 755 unsigned long val; 756 int mantissa, exponent; 757 758 mantissa = (int)((prec >> 4) & 0x0f) % 10; 759 exponent = (int)((prec >> 0) & 0x0f) % 10; 760 761 val = mantissa * poweroften[exponent]; 762 763 (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100); 764 return (retbuf); 765 } 766 767 /*% converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */ 768 static u_int8_t 769 precsize_aton(const char **strptr) { 770 unsigned int mval = 0, cmval = 0; 771 u_int8_t retval = 0; 772 const char *cp; 773 int exponent; 774 int mantissa; 775 776 cp = *strptr; 777 778 while (isdigit((unsigned char)*cp)) 779 mval = mval * 10 + (*cp++ - '0'); 780 781 if (*cp == '.') { /*%< centimeters */ 782 cp++; 783 if (isdigit((unsigned char)*cp)) { 784 cmval = (*cp++ - '0') * 10; 785 if (isdigit((unsigned char)*cp)) { 786 cmval += (*cp++ - '0'); 787 } 788 } 789 } 790 cmval = (mval * 100) + cmval; 791 792 for (exponent = 0; exponent < 9; exponent++) 793 if (cmval < poweroften[exponent+1]) 794 break; 795 796 mantissa = cmval / poweroften[exponent]; 797 if (mantissa > 9) 798 mantissa = 9; 799 800 retval = (mantissa << 4) | exponent; 801 802 *strptr = cp; 803 804 return (retval); 805 } 806 807 /*% converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */ 808 static u_int32_t 809 latlon2ul(const char **latlonstrptr, int *which) { 810 const char *cp; 811 u_int32_t retval; 812 int deg = 0, min = 0, secs = 0, secsfrac = 0; 813 814 cp = *latlonstrptr; 815 816 while (isdigit((unsigned char)*cp)) 817 deg = deg * 10 + (*cp++ - '0'); 818 819 while (isspace((unsigned char)*cp)) 820 cp++; 821 822 if (!(isdigit((unsigned char)*cp))) 823 goto fndhemi; 824 825 while (isdigit((unsigned char)*cp)) 826 min = min * 10 + (*cp++ - '0'); 827 828 while (isspace((unsigned char)*cp)) 829 cp++; 830 831 if (!(isdigit((unsigned char)*cp))) 832 goto fndhemi; 833 834 while (isdigit((unsigned char)*cp)) 835 secs = secs * 10 + (*cp++ - '0'); 836 837 if (*cp == '.') { /*%< decimal seconds */ 838 cp++; 839 if (isdigit((unsigned char)*cp)) { 840 secsfrac = (*cp++ - '0') * 100; 841 if (isdigit((unsigned char)*cp)) { 842 secsfrac += (*cp++ - '0') * 10; 843 if (isdigit((unsigned char)*cp)) { 844 secsfrac += (*cp++ - '0'); 845 } 846 } 847 } 848 } 849 850 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 851 cp++; 852 853 while (isspace((unsigned char)*cp)) 854 cp++; 855 856 fndhemi: 857 switch (*cp) { 858 case 'N': case 'n': 859 case 'E': case 'e': 860 retval = ((unsigned)1<<31) 861 + (((((deg * 60) + min) * 60) + secs) * 1000) 862 + secsfrac; 863 break; 864 case 'S': case 's': 865 case 'W': case 'w': 866 retval = ((unsigned)1<<31) 867 - (((((deg * 60) + min) * 60) + secs) * 1000) 868 - secsfrac; 869 break; 870 default: 871 retval = 0; /*%< invalid value -- indicates error */ 872 break; 873 } 874 875 switch (*cp) { 876 case 'N': case 'n': 877 case 'S': case 's': 878 *which = 1; /*%< latitude */ 879 break; 880 case 'E': case 'e': 881 case 'W': case 'w': 882 *which = 2; /*%< longitude */ 883 break; 884 default: 885 *which = 0; /*%< error */ 886 break; 887 } 888 889 cp++; /*%< skip the hemisphere */ 890 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 891 cp++; 892 893 while (isspace((unsigned char)*cp)) /*%< move to next field */ 894 cp++; 895 896 *latlonstrptr = cp; 897 898 return (retval); 899 } 900 901 /*% 902 * converts a zone file representation in a string to an RDATA on-the-wire 903 * representation. */ 904 int 905 loc_aton(const char *ascii, u_char *binary) 906 { 907 const char *cp, *maxcp; 908 u_char *bcp; 909 910 u_int32_t latit = 0, longit = 0, alt = 0; 911 u_int32_t lltemp1 = 0, lltemp2 = 0; 912 int altmeters = 0, altfrac = 0, altsign = 1; 913 u_int8_t hp = 0x16; /*%< default = 1e6 cm = 10000.00m = 10km */ 914 u_int8_t vp = 0x13; /*%< default = 1e3 cm = 10.00m */ 915 u_int8_t siz = 0x12; /*%< default = 1e2 cm = 1.00m */ 916 int which1 = 0, which2 = 0; 917 918 cp = ascii; 919 maxcp = cp + strlen(ascii); 920 921 lltemp1 = latlon2ul(&cp, &which1); 922 923 lltemp2 = latlon2ul(&cp, &which2); 924 925 switch (which1 + which2) { 926 case 3: /*%< 1 + 2, the only valid combination */ 927 if ((which1 == 1) && (which2 == 2)) { /*%< normal case */ 928 latit = lltemp1; 929 longit = lltemp2; 930 } else if ((which1 == 2) && (which2 == 1)) { /*%< reversed */ 931 longit = lltemp1; 932 latit = lltemp2; 933 } else { /*%< some kind of brokenness */ 934 return (0); 935 } 936 break; 937 default: /*%< we didn't get one of each */ 938 return (0); 939 } 940 941 /* altitude */ 942 if (*cp == '-') { 943 altsign = -1; 944 cp++; 945 } 946 947 if (*cp == '+') 948 cp++; 949 950 while (isdigit((unsigned char)*cp)) 951 altmeters = altmeters * 10 + (*cp++ - '0'); 952 953 if (*cp == '.') { /*%< decimal meters */ 954 cp++; 955 if (isdigit((unsigned char)*cp)) { 956 altfrac = (*cp++ - '0') * 10; 957 if (isdigit((unsigned char)*cp)) { 958 altfrac += (*cp++ - '0'); 959 } 960 } 961 } 962 963 alt = (10000000 + (altsign * (altmeters * 100 + altfrac))); 964 965 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 966 cp++; 967 968 while (isspace((unsigned char)*cp) && (cp < maxcp)) 969 cp++; 970 971 if (cp >= maxcp) 972 goto defaults; 973 974 siz = precsize_aton(&cp); 975 976 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 977 cp++; 978 979 while (isspace((unsigned char)*cp) && (cp < maxcp)) 980 cp++; 981 982 if (cp >= maxcp) 983 goto defaults; 984 985 hp = precsize_aton(&cp); 986 987 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 988 cp++; 989 990 while (isspace((unsigned char)*cp) && (cp < maxcp)) 991 cp++; 992 993 if (cp >= maxcp) 994 goto defaults; 995 996 vp = precsize_aton(&cp); 997 998 defaults: 999 1000 bcp = binary; 1001 *bcp++ = (u_int8_t) 0; /*%< version byte */ 1002 *bcp++ = siz; 1003 *bcp++ = hp; 1004 *bcp++ = vp; 1005 PUTLONG(latit,bcp); 1006 PUTLONG(longit,bcp); 1007 PUTLONG(alt,bcp); 1008 1009 return (16); /*%< size of RR in octets */ 1010 } 1011 1012 /*% takes an on-the-wire LOC RR and formats it in a human readable format. */ 1013 const char * 1014 loc_ntoa(const u_char *binary, char *ascii) 1015 { 1016 static const char *error = "?"; 1017 static char tmpbuf[sizeof 1018 "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"]; 1019 const u_char *cp = binary; 1020 1021 int latdeg, latmin, latsec, latsecfrac; 1022 int longdeg, longmin, longsec, longsecfrac; 1023 char northsouth, eastwest; 1024 const char *altsign; 1025 int altmeters, altfrac; 1026 1027 const u_int32_t referencealt = 100000 * 100; 1028 1029 int32_t latval, longval, altval; 1030 u_int32_t templ; 1031 u_int8_t sizeval, hpval, vpval, versionval; 1032 1033 char *sizestr, *hpstr, *vpstr; 1034 1035 versionval = *cp++; 1036 1037 if (ascii == NULL) 1038 ascii = tmpbuf; 1039 1040 if (versionval) { 1041 (void) sprintf(ascii, "; error: unknown LOC RR version"); 1042 return (ascii); 1043 } 1044 1045 sizeval = *cp++; 1046 1047 hpval = *cp++; 1048 vpval = *cp++; 1049 1050 GETLONG(templ, cp); 1051 latval = (templ - ((unsigned)1<<31)); 1052 1053 GETLONG(templ, cp); 1054 longval = (templ - ((unsigned)1<<31)); 1055 1056 GETLONG(templ, cp); 1057 if (templ < referencealt) { /*%< below WGS 84 spheroid */ 1058 altval = referencealt - templ; 1059 altsign = "-"; 1060 } else { 1061 altval = templ - referencealt; 1062 altsign = ""; 1063 } 1064 1065 if (latval < 0) { 1066 northsouth = 'S'; 1067 latval = -latval; 1068 } else 1069 northsouth = 'N'; 1070 1071 latsecfrac = latval % 1000; 1072 latval = latval / 1000; 1073 latsec = latval % 60; 1074 latval = latval / 60; 1075 latmin = latval % 60; 1076 latval = latval / 60; 1077 latdeg = latval; 1078 1079 if (longval < 0) { 1080 eastwest = 'W'; 1081 longval = -longval; 1082 } else 1083 eastwest = 'E'; 1084 1085 longsecfrac = longval % 1000; 1086 longval = longval / 1000; 1087 longsec = longval % 60; 1088 longval = longval / 60; 1089 longmin = longval % 60; 1090 longval = longval / 60; 1091 longdeg = longval; 1092 1093 altfrac = altval % 100; 1094 altmeters = (altval / 100); 1095 1096 sizestr = strdup(precsize_ntoa(sizeval)); 1097 hpstr = strdup(precsize_ntoa(hpval)); 1098 vpstr = strdup(precsize_ntoa(vpval)); 1099 1100 sprintf(ascii, 1101 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm", 1102 latdeg, latmin, latsec, latsecfrac, northsouth, 1103 longdeg, longmin, longsec, longsecfrac, eastwest, 1104 altsign, altmeters, altfrac, 1105 (sizestr != NULL) ? sizestr : error, 1106 (hpstr != NULL) ? hpstr : error, 1107 (vpstr != NULL) ? vpstr : error); 1108 1109 if (sizestr != NULL) 1110 free(sizestr); 1111 if (hpstr != NULL) 1112 free(hpstr); 1113 if (vpstr != NULL) 1114 free(vpstr); 1115 1116 return (ascii); 1117 } 1118 1119 1120 /*% Return the number of DNS hierarchy levels in the name. */ 1121 int 1122 dn_count_labels(const char *name) { 1123 int i, len, count; 1124 1125 len = strlen(name); 1126 for (i = 0, count = 0; i < len; i++) { 1127 /* XXX need to check for \. or use named's nlabels(). */ 1128 if (name[i] == '.') 1129 count++; 1130 } 1131 1132 /* don't count initial wildcard */ 1133 if (name[0] == '*') 1134 if (count) 1135 count--; 1136 1137 /* don't count the null label for root. */ 1138 /* if terminating '.' not found, must adjust */ 1139 /* count to include last label */ 1140 if (len > 0 && name[len-1] != '.') 1141 count++; 1142 return (count); 1143 } 1144 1145 /*% 1146 * Make dates expressed in seconds-since-Jan-1-1970 easy to read. 1147 * SIG records are required to be printed like this, by the Secure DNS RFC. 1148 */ 1149 char * 1150 p_secstodate (u_long secs) { 1151 char *output = p_secstodate_output; 1152 time_t clock = secs; 1153 struct tm *time; 1154 #ifdef HAVE_TIME_R 1155 struct tm res; 1156 1157 time = gmtime_r(&clock, &res); 1158 #else 1159 time = gmtime(&clock); 1160 #endif 1161 time->tm_year += 1900; 1162 time->tm_mon += 1; 1163 sprintf(output, "%04d%02d%02d%02d%02d%02d", 1164 time->tm_year, time->tm_mon, time->tm_mday, 1165 time->tm_hour, time->tm_min, time->tm_sec); 1166 return (output); 1167 } 1168 1169 u_int16_t 1170 res_nametoclass(const char *buf, int *successp) { 1171 unsigned long result; 1172 char *endptr; 1173 int success; 1174 1175 result = sym_ston(__p_class_syms, buf, &success); 1176 if (success) 1177 goto done; 1178 1179 if (strncasecmp(buf, "CLASS", 5) != 0 || 1180 !isdigit((unsigned char)buf[5])) 1181 goto done; 1182 errno = 0; 1183 result = strtoul(buf + 5, &endptr, 10); 1184 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1185 success = 1; 1186 done: 1187 if (successp) 1188 *successp = success; 1189 return (result); 1190 } 1191 1192 u_int16_t 1193 res_nametotype(const char *buf, int *successp) { 1194 unsigned long result; 1195 char *endptr; 1196 int success; 1197 1198 result = sym_ston(__p_type_syms, buf, &success); 1199 if (success) 1200 goto done; 1201 1202 if (strncasecmp(buf, "type", 4) != 0 || 1203 !isdigit((unsigned char)buf[4])) 1204 goto done; 1205 errno = 0; 1206 result = strtoul(buf + 4, &endptr, 10); 1207 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1208 success = 1; 1209 done: 1210 if (successp) 1211 *successp = success; 1212 return (result); 1213 } 1214 1215 /* 1216 * Weak aliases for applications that use certain private entry points, 1217 * and fail to include <resolv.h>. 1218 */ 1219 #undef fp_resstat 1220 __weak_reference(__fp_resstat, fp_resstat); 1221 #undef p_fqnname 1222 __weak_reference(__p_fqnname, p_fqnname); 1223 #undef sym_ston 1224 __weak_reference(__sym_ston, sym_ston); 1225 #undef sym_ntos 1226 __weak_reference(__sym_ntos, sym_ntos); 1227 #undef sym_ntop 1228 __weak_reference(__sym_ntop, sym_ntop); 1229 #undef dn_count_labels 1230 __weak_reference(__dn_count_labels, dn_count_labels); 1231 #undef p_secstodate 1232 __weak_reference(__p_secstodate, p_secstodate); 1233 1234 /*! \file */ 1235