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 #if defined(LIBC_SCCS) && !defined(lint) 95 static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93"; 96 static const char rcsid[] = "$Id: res_debug.c,v 1.19 2009/02/26 11:20:20 tbox Exp $"; 97 #endif /* LIBC_SCCS and not lint */ 98 #include "port_before.h" 99 100 #include <sys/param.h> 101 #include <sys/socket.h> 102 103 #include <netinet/in.h> 104 #include <arpa/inet.h> 105 #include <arpa/nameser.h> 106 107 #include <ctype.h> 108 #include <errno.h> 109 #include <math.h> 110 #include <netdb.h> 111 #include <resolv.h> 112 #include <resolv_mt.h> 113 #include <stdio.h> 114 #include <stdlib.h> 115 #include <string.h> 116 #include <time.h> 117 118 #include "port_after.h" 119 120 #ifdef SPRINTF_CHAR 121 # define SPRINTF(x) strlen(sprintf/**/x) 122 #else 123 # define SPRINTF(x) sprintf x 124 #endif 125 126 extern const char *_res_opcodes[]; 127 extern const char *_res_sectioncodes[]; 128 129 /*% 130 * Print the current options. 131 */ 132 void 133 fp_resstat(const res_state statp, FILE *file) { 134 u_long mask; 135 136 fprintf(file, ";; res options:"); 137 for (mask = 1; mask != 0U; mask <<= 1) 138 if (statp->options & mask) 139 fprintf(file, " %s", p_option(mask)); 140 putc('\n', file); 141 } 142 143 static void 144 do_section(const res_state statp, 145 ns_msg *handle, ns_sect section, 146 int pflag, FILE *file) 147 { 148 int n, sflag, rrnum; 149 static int buflen = 2048; 150 char *buf; 151 ns_opcode opcode; 152 ns_rr rr; 153 154 /* 155 * Print answer records. 156 */ 157 sflag = (statp->pfcode & pflag); 158 if (statp->pfcode && !sflag) 159 return; 160 161 buf = malloc(buflen); 162 if (buf == NULL) { 163 fprintf(file, ";; memory allocation failure\n"); 164 return; 165 } 166 167 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode); 168 rrnum = 0; 169 for (;;) { 170 if (ns_parserr(handle, section, rrnum, &rr)) { 171 if (errno != ENODEV) 172 fprintf(file, ";; ns_parserr: %s\n", 173 strerror(errno)); 174 else if (rrnum > 0 && sflag != 0 && 175 (statp->pfcode & RES_PRF_HEAD1)) 176 putc('\n', file); 177 goto cleanup; 178 } 179 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1)) 180 fprintf(file, ";; %s SECTION:\n", 181 p_section(section, opcode)); 182 if (section == ns_s_qd) 183 fprintf(file, ";;\t%s, type = %s, class = %s\n", 184 ns_rr_name(rr), 185 p_type(ns_rr_type(rr)), 186 p_class(ns_rr_class(rr))); 187 else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) { 188 u_int16_t optcode, optlen, rdatalen = ns_rr_rdlen(rr); 189 u_int32_t ttl = ns_rr_ttl(rr); 190 191 fprintf(file, 192 "; EDNS: version: %u, udp=%u, flags=%04x\n", 193 (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff); 194 195 while (rdatalen >= 4) { 196 const u_char *cp = ns_rr_rdata(rr); 197 int i; 198 199 GETSHORT(optcode, cp); 200 GETSHORT(optlen, cp); 201 202 if (optcode == NS_OPT_NSID) { 203 fputs("; NSID: ", file); 204 if (optlen == 0) { 205 fputs("; NSID\n", file); 206 } else { 207 fputs("; NSID: ", file); 208 for (i = 0; i < optlen; i++) 209 fprintf(file, "%02x ", 210 cp[i]); 211 fputs(" (",file); 212 for (i = 0; i < optlen; i++) 213 fprintf(file, "%c", 214 isprint(cp[i])? 215 cp[i] : '.'); 216 fputs(")\n", file); 217 } 218 } else { 219 if (optlen == 0) { 220 fprintf(file, "; OPT=%u\n", 221 optcode); 222 } else { 223 fprintf(file, "; OPT=%u: ", 224 optcode); 225 for (i = 0; i < optlen; i++) 226 fprintf(file, "%02x ", 227 cp[i]); 228 fputs(" (",file); 229 for (i = 0; i < optlen; i++) 230 fprintf(file, "%c", 231 isprint(cp[i]) ? 232 cp[i] : '.'); 233 fputs(")\n", file); 234 } 235 } 236 rdatalen -= 4 + optlen; 237 } 238 } else { 239 n = ns_sprintrr(handle, &rr, NULL, NULL, 240 buf, buflen); 241 if (n < 0) { 242 if (errno == ENOSPC) { 243 free(buf); 244 buf = NULL; 245 if (buflen < 131072) 246 buf = malloc(buflen += 1024); 247 if (buf == NULL) { 248 fprintf(file, 249 ";; memory allocation failure\n"); 250 return; 251 } 252 continue; 253 } 254 fprintf(file, ";; ns_sprintrr: %s\n", 255 strerror(errno)); 256 goto cleanup; 257 } 258 fputs(buf, file); 259 fputc('\n', file); 260 } 261 rrnum++; 262 } 263 cleanup: 264 if (buf != NULL) 265 free(buf); 266 } 267 268 /*% 269 * Print the contents of a query. 270 * This is intended to be primarily a debugging routine. 271 */ 272 void 273 res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) { 274 ns_msg handle; 275 int qdcount, ancount, nscount, arcount; 276 u_int opcode, rcode, id; 277 278 if (ns_initparse(msg, len, &handle) < 0) { 279 fprintf(file, ";; ns_initparse: %s\n", strerror(errno)); 280 return; 281 } 282 opcode = ns_msg_getflag(handle, ns_f_opcode); 283 rcode = ns_msg_getflag(handle, ns_f_rcode); 284 id = ns_msg_id(handle); 285 qdcount = ns_msg_count(handle, ns_s_qd); 286 ancount = ns_msg_count(handle, ns_s_an); 287 nscount = ns_msg_count(handle, ns_s_ns); 288 arcount = ns_msg_count(handle, ns_s_ar); 289 290 /* 291 * Print header fields. 292 */ 293 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode) 294 fprintf(file, 295 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n", 296 _res_opcodes[opcode], p_rcode(rcode), id); 297 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX)) 298 putc(';', file); 299 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) { 300 fprintf(file, "; flags:"); 301 if (ns_msg_getflag(handle, ns_f_qr)) 302 fprintf(file, " qr"); 303 if (ns_msg_getflag(handle, ns_f_aa)) 304 fprintf(file, " aa"); 305 if (ns_msg_getflag(handle, ns_f_tc)) 306 fprintf(file, " tc"); 307 if (ns_msg_getflag(handle, ns_f_rd)) 308 fprintf(file, " rd"); 309 if (ns_msg_getflag(handle, ns_f_ra)) 310 fprintf(file, " ra"); 311 if (ns_msg_getflag(handle, ns_f_z)) 312 fprintf(file, " ??"); 313 if (ns_msg_getflag(handle, ns_f_ad)) 314 fprintf(file, " ad"); 315 if (ns_msg_getflag(handle, ns_f_cd)) 316 fprintf(file, " cd"); 317 } 318 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) { 319 fprintf(file, "; %s: %d", 320 p_section(ns_s_qd, opcode), qdcount); 321 fprintf(file, ", %s: %d", 322 p_section(ns_s_an, opcode), ancount); 323 fprintf(file, ", %s: %d", 324 p_section(ns_s_ns, opcode), nscount); 325 fprintf(file, ", %s: %d", 326 p_section(ns_s_ar, opcode), arcount); 327 } 328 if ((!statp->pfcode) || (statp->pfcode & 329 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) { 330 putc('\n',file); 331 } 332 /* 333 * Print the various sections. 334 */ 335 do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file); 336 do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file); 337 do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file); 338 do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file); 339 if (qdcount == 0 && ancount == 0 && 340 nscount == 0 && arcount == 0) 341 putc('\n', file); 342 } 343 344 const u_char * 345 p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) { 346 char name[MAXDNAME]; 347 int n; 348 349 if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0) 350 return (NULL); 351 if (name[0] == '\0') 352 putc('.', file); 353 else 354 fputs(name, file); 355 return (cp + n); 356 } 357 358 const u_char * 359 p_cdname(const u_char *cp, const u_char *msg, FILE *file) { 360 return (p_cdnname(cp, msg, PACKETSZ, file)); 361 } 362 363 /*% 364 * Return a fully-qualified domain name from a compressed name (with 365 length supplied). */ 366 367 const u_char * 368 p_fqnname(const u_char *cp, const u_char *msg, int msglen, char *name, 369 int namelen) 370 { 371 int n, newlen; 372 373 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0) 374 return (NULL); 375 newlen = strlen(name); 376 if (newlen == 0 || name[newlen - 1] != '.') { 377 if (newlen + 1 >= namelen) /*%< Lack space for final dot */ 378 return (NULL); 379 else 380 strcpy(name + newlen, "."); 381 } 382 return (cp + n); 383 } 384 385 /* XXX: the rest of these functions need to become length-limited, too. */ 386 387 const u_char * 388 p_fqname(const u_char *cp, const u_char *msg, FILE *file) { 389 char name[MAXDNAME]; 390 const u_char *n; 391 392 n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name); 393 if (n == NULL) 394 return (NULL); 395 fputs(name, file); 396 return (n); 397 } 398 399 /*% 400 * Names of RR classes and qclasses. Classes and qclasses are the same, except 401 * that C_ANY is a qclass but not a class. (You can ask for records of class 402 * C_ANY, but you can't have any records of that class in the database.) 403 */ 404 const struct res_sym __p_class_syms[] = { 405 {C_IN, "IN", (char *)0}, 406 {C_CHAOS, "CH", (char *)0}, 407 {C_CHAOS, "CHAOS", (char *)0}, 408 {C_HS, "HS", (char *)0}, 409 {C_HS, "HESIOD", (char *)0}, 410 {C_ANY, "ANY", (char *)0}, 411 {C_NONE, "NONE", (char *)0}, 412 {C_IN, (char *)0, (char *)0} 413 }; 414 415 /*% 416 * Names of message sections. 417 */ 418 static const struct res_sym __p_default_section_syms[] = { 419 {ns_s_qd, "QUERY", (char *)0}, 420 {ns_s_an, "ANSWER", (char *)0}, 421 {ns_s_ns, "AUTHORITY", (char *)0}, 422 {ns_s_ar, "ADDITIONAL", (char *)0}, 423 {0, (char *)0, (char *)0} 424 }; 425 426 static const struct res_sym __p_update_section_syms[] = { 427 {S_ZONE, "ZONE", (char *)0}, 428 {S_PREREQ, "PREREQUISITE", (char *)0}, 429 {S_UPDATE, "UPDATE", (char *)0}, 430 {S_ADDT, "ADDITIONAL", (char *)0}, 431 {0, (char *)0, (char *)0} 432 }; 433 434 const struct res_sym __p_key_syms[] = { 435 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"}, 436 {NS_ALG_DH, "DH", "Diffie Hellman"}, 437 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"}, 438 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"}, 439 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"}, 440 {0, NULL, NULL} 441 }; 442 443 const struct res_sym __p_cert_syms[] = { 444 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"}, 445 {cert_t_spki, "SPKI", "SPKI certificate"}, 446 {cert_t_pgp, "PGP", "PGP certificate"}, 447 {cert_t_url, "URL", "URL Private"}, 448 {cert_t_oid, "OID", "OID Private"}, 449 {0, NULL, NULL} 450 }; 451 452 /*% 453 * Names of RR types and qtypes. Types and qtypes are the same, except 454 * that T_ANY is a qtype but not a type. (You can ask for records of type 455 * T_ANY, but you can't have any records of that type in the database.) 456 */ 457 const struct res_sym __p_type_syms[] = { 458 {ns_t_a, "A", "address"}, 459 {ns_t_ns, "NS", "name server"}, 460 {ns_t_md, "MD", "mail destination (deprecated)"}, 461 {ns_t_mf, "MF", "mail forwarder (deprecated)"}, 462 {ns_t_cname, "CNAME", "canonical name"}, 463 {ns_t_soa, "SOA", "start of authority"}, 464 {ns_t_mb, "MB", "mailbox"}, 465 {ns_t_mg, "MG", "mail group member"}, 466 {ns_t_mr, "MR", "mail rename"}, 467 {ns_t_null, "NULL", "null"}, 468 {ns_t_wks, "WKS", "well-known service (deprecated)"}, 469 {ns_t_ptr, "PTR", "domain name pointer"}, 470 {ns_t_hinfo, "HINFO", "host information"}, 471 {ns_t_minfo, "MINFO", "mailbox information"}, 472 {ns_t_mx, "MX", "mail exchanger"}, 473 {ns_t_txt, "TXT", "text"}, 474 {ns_t_rp, "RP", "responsible person"}, 475 {ns_t_afsdb, "AFSDB", "DCE or AFS server"}, 476 {ns_t_x25, "X25", "X25 address"}, 477 {ns_t_isdn, "ISDN", "ISDN address"}, 478 {ns_t_rt, "RT", "router"}, 479 {ns_t_nsap, "NSAP", "nsap address"}, 480 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"}, 481 {ns_t_sig, "SIG", "signature"}, 482 {ns_t_key, "KEY", "key"}, 483 {ns_t_px, "PX", "mapping information"}, 484 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"}, 485 {ns_t_aaaa, "AAAA", "IPv6 address"}, 486 {ns_t_loc, "LOC", "location"}, 487 {ns_t_nxt, "NXT", "next valid name (unimplemented)"}, 488 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"}, 489 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"}, 490 {ns_t_srv, "SRV", "server selection"}, 491 {ns_t_atma, "ATMA", "ATM address (unimplemented)"}, 492 {ns_t_naptr, "NAPTR", "naptr"}, 493 {ns_t_kx, "KX", "key exchange"}, 494 {ns_t_cert, "CERT", "certificate"}, 495 {ns_t_a6, "A", "IPv6 address (experminental)"}, 496 {ns_t_dname, "DNAME", "non-terminal redirection"}, 497 {ns_t_opt, "OPT", "opt"}, 498 {ns_t_apl, "apl", "apl"}, 499 {ns_t_ds, "DS", "delegation signer"}, 500 {ns_t_sshfp, "SSFP", "SSH fingerprint"}, 501 {ns_t_ipseckey, "IPSECKEY", "IPSEC key"}, 502 {ns_t_rrsig, "RRSIG", "rrsig"}, 503 {ns_t_nsec, "NSEC", "nsec"}, 504 {ns_t_dnskey, "DNSKEY", "DNS key"}, 505 {ns_t_dhcid, "DHCID", "dynamic host configuration identifier"}, 506 {ns_t_nsec3, "NSEC3", "nsec3"}, 507 {ns_t_nsec3param, "NSEC3PARAM", "NSEC3 parameters"}, 508 {ns_t_hip, "HIP", "host identity protocol"}, 509 {ns_t_spf, "SPF", "sender policy framework"}, 510 {ns_t_tkey, "TKEY", "tkey"}, 511 {ns_t_tsig, "TSIG", "transaction signature"}, 512 {ns_t_ixfr, "IXFR", "incremental zone transfer"}, 513 {ns_t_axfr, "AXFR", "zone transfer"}, 514 {ns_t_zxfr, "ZXFR", "compressed zone transfer"}, 515 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"}, 516 {ns_t_maila, "MAILA", "mail agent (deprecated)"}, 517 {ns_t_naptr, "NAPTR", "URN Naming Authority"}, 518 {ns_t_kx, "KX", "Key Exchange"}, 519 {ns_t_cert, "CERT", "Certificate"}, 520 {ns_t_a6, "A6", "IPv6 Address"}, 521 {ns_t_dname, "DNAME", "dname"}, 522 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"}, 523 {ns_t_opt, "OPT", "EDNS Options"}, 524 {ns_t_any, "ANY", "\"any\""}, 525 {ns_t_dlv, "DLV", "DNSSEC look-aside validation"}, 526 {0, NULL, NULL} 527 }; 528 529 /*% 530 * Names of DNS rcodes. 531 */ 532 const struct res_sym __p_rcode_syms[] = { 533 {ns_r_noerror, "NOERROR", "no error"}, 534 {ns_r_formerr, "FORMERR", "format error"}, 535 {ns_r_servfail, "SERVFAIL", "server failed"}, 536 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"}, 537 {ns_r_notimpl, "NOTIMP", "not implemented"}, 538 {ns_r_refused, "REFUSED", "refused"}, 539 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"}, 540 {ns_r_yxrrset, "YXRRSET", "rrset exists"}, 541 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"}, 542 {ns_r_notauth, "NOTAUTH", "not authoritative"}, 543 {ns_r_notzone, "NOTZONE", "Not in zone"}, 544 {ns_r_max, "", ""}, 545 {ns_r_badsig, "BADSIG", "bad signature"}, 546 {ns_r_badkey, "BADKEY", "bad key"}, 547 {ns_r_badtime, "BADTIME", "bad time"}, 548 {0, NULL, NULL} 549 }; 550 551 int 552 sym_ston(const struct res_sym *syms, const char *name, int *success) { 553 for ((void)NULL; syms->name != 0; syms++) { 554 if (strcasecmp (name, syms->name) == 0) { 555 if (success) 556 *success = 1; 557 return (syms->number); 558 } 559 } 560 if (success) 561 *success = 0; 562 return (syms->number); /*%< The default value. */ 563 } 564 565 const char * 566 sym_ntos(const struct res_sym *syms, int number, int *success) { 567 char *unname = sym_ntos_unname; 568 569 for ((void)NULL; syms->name != 0; syms++) { 570 if (number == syms->number) { 571 if (success) 572 *success = 1; 573 return (syms->name); 574 } 575 } 576 577 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 578 if (success) 579 *success = 0; 580 return (unname); 581 } 582 583 const char * 584 sym_ntop(const struct res_sym *syms, int number, int *success) { 585 char *unname = sym_ntop_unname; 586 587 for ((void)NULL; syms->name != 0; syms++) { 588 if (number == syms->number) { 589 if (success) 590 *success = 1; 591 return (syms->humanname); 592 } 593 } 594 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 595 if (success) 596 *success = 0; 597 return (unname); 598 } 599 600 /*% 601 * Return a string for the type. 602 */ 603 const char * 604 p_type(int type) { 605 int success; 606 const char *result; 607 static char typebuf[20]; 608 609 result = sym_ntos(__p_type_syms, type, &success); 610 if (success) 611 return (result); 612 if (type < 0 || type > 0xffff) 613 return ("BADTYPE"); 614 sprintf(typebuf, "TYPE%d", type); 615 return (typebuf); 616 } 617 618 /*% 619 * Return a string for the type. 620 */ 621 const char * 622 p_section(int section, int opcode) { 623 const struct res_sym *symbols; 624 625 switch (opcode) { 626 case ns_o_update: 627 symbols = __p_update_section_syms; 628 break; 629 default: 630 symbols = __p_default_section_syms; 631 break; 632 } 633 return (sym_ntos(symbols, section, (int *)0)); 634 } 635 636 /*% 637 * Return a mnemonic for class. 638 */ 639 const char * 640 p_class(int class) { 641 int success; 642 const char *result; 643 static char classbuf[20]; 644 645 result = sym_ntos(__p_class_syms, class, &success); 646 if (success) 647 return (result); 648 if (class < 0 || class > 0xffff) 649 return ("BADCLASS"); 650 sprintf(classbuf, "CLASS%d", class); 651 return (classbuf); 652 } 653 654 /*% 655 * Return a mnemonic for an option 656 */ 657 const char * 658 p_option(u_long option) { 659 char *nbuf = p_option_nbuf; 660 661 switch (option) { 662 case RES_INIT: return "init"; 663 case RES_DEBUG: return "debug"; 664 case RES_AAONLY: return "aaonly(unimpl)"; 665 case RES_USEVC: return "usevc"; 666 case RES_PRIMARY: return "primry(unimpl)"; 667 case RES_IGNTC: return "igntc"; 668 case RES_RECURSE: return "recurs"; 669 case RES_DEFNAMES: return "defnam"; 670 case RES_STAYOPEN: return "styopn"; 671 case RES_DNSRCH: return "dnsrch"; 672 case RES_INSECURE1: return "insecure1"; 673 case RES_INSECURE2: return "insecure2"; 674 case RES_NOALIASES: return "noaliases"; 675 case RES_USE_INET6: return "inet6"; 676 #ifdef RES_USE_EDNS0 /*%< KAME extension */ 677 case RES_USE_EDNS0: return "edns0"; 678 case RES_NSID: return "nsid"; 679 #endif 680 #ifdef RES_USE_DNAME 681 case RES_USE_DNAME: return "dname"; 682 #endif 683 #ifdef RES_USE_DNSSEC 684 case RES_USE_DNSSEC: return "dnssec"; 685 #endif 686 #ifdef RES_NOTLDQUERY 687 case RES_NOTLDQUERY: return "no-tld-query"; 688 #endif 689 #ifdef RES_NO_NIBBLE2 690 case RES_NO_NIBBLE2: return "no-nibble2"; 691 #endif 692 /* XXX nonreentrant */ 693 default: sprintf(nbuf, "?0x%lx?", (u_long)option); 694 return (nbuf); 695 } 696 } 697 698 /*% 699 * Return a mnemonic for a time to live. 700 */ 701 const char * 702 p_time(u_int32_t value) { 703 char *nbuf = p_time_nbuf; 704 705 if (ns_format_ttl(value, nbuf, sizeof nbuf) < 0) 706 sprintf(nbuf, "%u", value); 707 return (nbuf); 708 } 709 710 /*% 711 * Return a string for the rcode. 712 */ 713 const char * 714 p_rcode(int rcode) { 715 return (sym_ntos(__p_rcode_syms, rcode, (int *)0)); 716 } 717 718 /*% 719 * Return a string for a res_sockaddr_union. 720 */ 721 const char * 722 p_sockun(union res_sockaddr_union u, char *buf, size_t size) { 723 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"]; 724 725 switch (u.sin.sin_family) { 726 case AF_INET: 727 inet_ntop(AF_INET, &u.sin.sin_addr, ret, sizeof ret); 728 break; 729 #ifdef HAS_INET6_STRUCTS 730 case AF_INET6: 731 inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret); 732 break; 733 #endif 734 default: 735 sprintf(ret, "[af%d]", u.sin.sin_family); 736 break; 737 } 738 if (size > 0U) { 739 strncpy(buf, ret, size - 1); 740 buf[size - 1] = '0'; 741 } 742 return (buf); 743 } 744 745 /*% 746 * routines to convert between on-the-wire RR format and zone file format. 747 * Does not contain conversion to/from decimal degrees; divide or multiply 748 * by 60*60*1000 for that. 749 */ 750 751 static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000, 752 1000000,10000000,100000000,1000000000}; 753 754 /*% takes an XeY precision/size value, returns a string representation. */ 755 static const char * 756 precsize_ntoa(u_int8_t prec) 757 { 758 char *retbuf = precsize_ntoa_retbuf; 759 unsigned long val; 760 int mantissa, exponent; 761 762 mantissa = (int)((prec >> 4) & 0x0f) % 10; 763 exponent = (int)((prec >> 0) & 0x0f) % 10; 764 765 val = mantissa * poweroften[exponent]; 766 767 (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100); 768 return (retbuf); 769 } 770 771 /*% converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */ 772 static u_int8_t 773 precsize_aton(const char **strptr) { 774 unsigned int mval = 0, cmval = 0; 775 u_int8_t retval = 0; 776 const char *cp; 777 int exponent; 778 int mantissa; 779 780 cp = *strptr; 781 782 while (isdigit((unsigned char)*cp)) 783 mval = mval * 10 + (*cp++ - '0'); 784 785 if (*cp == '.') { /*%< centimeters */ 786 cp++; 787 if (isdigit((unsigned char)*cp)) { 788 cmval = (*cp++ - '0') * 10; 789 if (isdigit((unsigned char)*cp)) { 790 cmval += (*cp++ - '0'); 791 } 792 } 793 } 794 cmval = (mval * 100) + cmval; 795 796 for (exponent = 0; exponent < 9; exponent++) 797 if (cmval < poweroften[exponent+1]) 798 break; 799 800 mantissa = cmval / poweroften[exponent]; 801 if (mantissa > 9) 802 mantissa = 9; 803 804 retval = (mantissa << 4) | exponent; 805 806 *strptr = cp; 807 808 return (retval); 809 } 810 811 /*% converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */ 812 static u_int32_t 813 latlon2ul(const char **latlonstrptr, int *which) { 814 const char *cp; 815 u_int32_t retval; 816 int deg = 0, min = 0, secs = 0, secsfrac = 0; 817 818 cp = *latlonstrptr; 819 820 while (isdigit((unsigned char)*cp)) 821 deg = deg * 10 + (*cp++ - '0'); 822 823 while (isspace((unsigned char)*cp)) 824 cp++; 825 826 if (!(isdigit((unsigned char)*cp))) 827 goto fndhemi; 828 829 while (isdigit((unsigned char)*cp)) 830 min = min * 10 + (*cp++ - '0'); 831 832 while (isspace((unsigned char)*cp)) 833 cp++; 834 835 if (!(isdigit((unsigned char)*cp))) 836 goto fndhemi; 837 838 while (isdigit((unsigned char)*cp)) 839 secs = secs * 10 + (*cp++ - '0'); 840 841 if (*cp == '.') { /*%< decimal seconds */ 842 cp++; 843 if (isdigit((unsigned char)*cp)) { 844 secsfrac = (*cp++ - '0') * 100; 845 if (isdigit((unsigned char)*cp)) { 846 secsfrac += (*cp++ - '0') * 10; 847 if (isdigit((unsigned char)*cp)) { 848 secsfrac += (*cp++ - '0'); 849 } 850 } 851 } 852 } 853 854 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 855 cp++; 856 857 while (isspace((unsigned char)*cp)) 858 cp++; 859 860 fndhemi: 861 switch (*cp) { 862 case 'N': case 'n': 863 case 'E': case 'e': 864 retval = ((unsigned)1<<31) 865 + (((((deg * 60) + min) * 60) + secs) * 1000) 866 + secsfrac; 867 break; 868 case 'S': case 's': 869 case 'W': case 'w': 870 retval = ((unsigned)1<<31) 871 - (((((deg * 60) + min) * 60) + secs) * 1000) 872 - secsfrac; 873 break; 874 default: 875 retval = 0; /*%< invalid value -- indicates error */ 876 break; 877 } 878 879 switch (*cp) { 880 case 'N': case 'n': 881 case 'S': case 's': 882 *which = 1; /*%< latitude */ 883 break; 884 case 'E': case 'e': 885 case 'W': case 'w': 886 *which = 2; /*%< longitude */ 887 break; 888 default: 889 *which = 0; /*%< error */ 890 break; 891 } 892 893 cp++; /*%< skip the hemisphere */ 894 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 895 cp++; 896 897 while (isspace((unsigned char)*cp)) /*%< move to next field */ 898 cp++; 899 900 *latlonstrptr = cp; 901 902 return (retval); 903 } 904 905 /*% 906 * converts a zone file representation in a string to an RDATA on-the-wire 907 * representation. */ 908 int 909 loc_aton(const char *ascii, u_char *binary) 910 { 911 const char *cp, *maxcp; 912 u_char *bcp; 913 914 u_int32_t latit = 0, longit = 0, alt = 0; 915 u_int32_t lltemp1 = 0, lltemp2 = 0; 916 int altmeters = 0, altfrac = 0, altsign = 1; 917 u_int8_t hp = 0x16; /*%< default = 1e6 cm = 10000.00m = 10km */ 918 u_int8_t vp = 0x13; /*%< default = 1e3 cm = 10.00m */ 919 u_int8_t siz = 0x12; /*%< default = 1e2 cm = 1.00m */ 920 int which1 = 0, which2 = 0; 921 922 cp = ascii; 923 maxcp = cp + strlen(ascii); 924 925 lltemp1 = latlon2ul(&cp, &which1); 926 927 lltemp2 = latlon2ul(&cp, &which2); 928 929 switch (which1 + which2) { 930 case 3: /*%< 1 + 2, the only valid combination */ 931 if ((which1 == 1) && (which2 == 2)) { /*%< normal case */ 932 latit = lltemp1; 933 longit = lltemp2; 934 } else if ((which1 == 2) && (which2 == 1)) { /*%< reversed */ 935 longit = lltemp1; 936 latit = lltemp2; 937 } else { /*%< some kind of brokenness */ 938 return (0); 939 } 940 break; 941 default: /*%< we didn't get one of each */ 942 return (0); 943 } 944 945 /* altitude */ 946 if (*cp == '-') { 947 altsign = -1; 948 cp++; 949 } 950 951 if (*cp == '+') 952 cp++; 953 954 while (isdigit((unsigned char)*cp)) 955 altmeters = altmeters * 10 + (*cp++ - '0'); 956 957 if (*cp == '.') { /*%< decimal meters */ 958 cp++; 959 if (isdigit((unsigned char)*cp)) { 960 altfrac = (*cp++ - '0') * 10; 961 if (isdigit((unsigned char)*cp)) { 962 altfrac += (*cp++ - '0'); 963 } 964 } 965 } 966 967 alt = (10000000 + (altsign * (altmeters * 100 + altfrac))); 968 969 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 970 cp++; 971 972 while (isspace((unsigned char)*cp) && (cp < maxcp)) 973 cp++; 974 975 if (cp >= maxcp) 976 goto defaults; 977 978 siz = precsize_aton(&cp); 979 980 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 981 cp++; 982 983 while (isspace((unsigned char)*cp) && (cp < maxcp)) 984 cp++; 985 986 if (cp >= maxcp) 987 goto defaults; 988 989 hp = precsize_aton(&cp); 990 991 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 992 cp++; 993 994 while (isspace((unsigned char)*cp) && (cp < maxcp)) 995 cp++; 996 997 if (cp >= maxcp) 998 goto defaults; 999 1000 vp = precsize_aton(&cp); 1001 1002 defaults: 1003 1004 bcp = binary; 1005 *bcp++ = (u_int8_t) 0; /*%< version byte */ 1006 *bcp++ = siz; 1007 *bcp++ = hp; 1008 *bcp++ = vp; 1009 PUTLONG(latit,bcp); 1010 PUTLONG(longit,bcp); 1011 PUTLONG(alt,bcp); 1012 1013 return (16); /*%< size of RR in octets */ 1014 } 1015 1016 /*% takes an on-the-wire LOC RR and formats it in a human readable format. */ 1017 const char * 1018 loc_ntoa(const u_char *binary, char *ascii) 1019 { 1020 static const char *error = "?"; 1021 static char tmpbuf[sizeof 1022 "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"]; 1023 const u_char *cp = binary; 1024 1025 int latdeg, latmin, latsec, latsecfrac; 1026 int longdeg, longmin, longsec, longsecfrac; 1027 char northsouth, eastwest; 1028 const char *altsign; 1029 int altmeters, altfrac; 1030 1031 const u_int32_t referencealt = 100000 * 100; 1032 1033 int32_t latval, longval, altval; 1034 u_int32_t templ; 1035 u_int8_t sizeval, hpval, vpval, versionval; 1036 1037 char *sizestr, *hpstr, *vpstr; 1038 1039 versionval = *cp++; 1040 1041 if (ascii == NULL) 1042 ascii = tmpbuf; 1043 1044 if (versionval) { 1045 (void) sprintf(ascii, "; error: unknown LOC RR version"); 1046 return (ascii); 1047 } 1048 1049 sizeval = *cp++; 1050 1051 hpval = *cp++; 1052 vpval = *cp++; 1053 1054 GETLONG(templ, cp); 1055 latval = (templ - ((unsigned)1<<31)); 1056 1057 GETLONG(templ, cp); 1058 longval = (templ - ((unsigned)1<<31)); 1059 1060 GETLONG(templ, cp); 1061 if (templ < referencealt) { /*%< below WGS 84 spheroid */ 1062 altval = referencealt - templ; 1063 altsign = "-"; 1064 } else { 1065 altval = templ - referencealt; 1066 altsign = ""; 1067 } 1068 1069 if (latval < 0) { 1070 northsouth = 'S'; 1071 latval = -latval; 1072 } else 1073 northsouth = 'N'; 1074 1075 latsecfrac = latval % 1000; 1076 latval = latval / 1000; 1077 latsec = latval % 60; 1078 latval = latval / 60; 1079 latmin = latval % 60; 1080 latval = latval / 60; 1081 latdeg = latval; 1082 1083 if (longval < 0) { 1084 eastwest = 'W'; 1085 longval = -longval; 1086 } else 1087 eastwest = 'E'; 1088 1089 longsecfrac = longval % 1000; 1090 longval = longval / 1000; 1091 longsec = longval % 60; 1092 longval = longval / 60; 1093 longmin = longval % 60; 1094 longval = longval / 60; 1095 longdeg = longval; 1096 1097 altfrac = altval % 100; 1098 altmeters = (altval / 100); 1099 1100 sizestr = strdup(precsize_ntoa(sizeval)); 1101 hpstr = strdup(precsize_ntoa(hpval)); 1102 vpstr = strdup(precsize_ntoa(vpval)); 1103 1104 sprintf(ascii, 1105 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm", 1106 latdeg, latmin, latsec, latsecfrac, northsouth, 1107 longdeg, longmin, longsec, longsecfrac, eastwest, 1108 altsign, altmeters, altfrac, 1109 (sizestr != NULL) ? sizestr : error, 1110 (hpstr != NULL) ? hpstr : error, 1111 (vpstr != NULL) ? vpstr : error); 1112 1113 if (sizestr != NULL) 1114 free(sizestr); 1115 if (hpstr != NULL) 1116 free(hpstr); 1117 if (vpstr != NULL) 1118 free(vpstr); 1119 1120 return (ascii); 1121 } 1122 1123 1124 /*% Return the number of DNS hierarchy levels in the name. */ 1125 int 1126 dn_count_labels(const char *name) { 1127 int i, len, count; 1128 1129 len = strlen(name); 1130 for (i = 0, count = 0; i < len; i++) { 1131 /* XXX need to check for \. or use named's nlabels(). */ 1132 if (name[i] == '.') 1133 count++; 1134 } 1135 1136 /* don't count initial wildcard */ 1137 if (name[0] == '*') 1138 if (count) 1139 count--; 1140 1141 /* don't count the null label for root. */ 1142 /* if terminating '.' not found, must adjust */ 1143 /* count to include last label */ 1144 if (len > 0 && name[len-1] != '.') 1145 count++; 1146 return (count); 1147 } 1148 1149 /*% 1150 * Make dates expressed in seconds-since-Jan-1-1970 easy to read. 1151 * SIG records are required to be printed like this, by the Secure DNS RFC. 1152 */ 1153 char * 1154 p_secstodate (u_long secs) { 1155 char *output = p_secstodate_output; 1156 time_t clock = secs; 1157 struct tm *time; 1158 #ifdef HAVE_TIME_R 1159 struct tm res; 1160 1161 time = gmtime_r(&clock, &res); 1162 #else 1163 time = gmtime(&clock); 1164 #endif 1165 time->tm_year += 1900; 1166 time->tm_mon += 1; 1167 sprintf(output, "%04d%02d%02d%02d%02d%02d", 1168 time->tm_year, time->tm_mon, time->tm_mday, 1169 time->tm_hour, time->tm_min, time->tm_sec); 1170 return (output); 1171 } 1172 1173 u_int16_t 1174 res_nametoclass(const char *buf, int *successp) { 1175 unsigned long result; 1176 char *endptr; 1177 int success; 1178 1179 result = sym_ston(__p_class_syms, buf, &success); 1180 if (success) 1181 goto done; 1182 1183 if (strncasecmp(buf, "CLASS", 5) != 0 || 1184 !isdigit((unsigned char)buf[5])) 1185 goto done; 1186 errno = 0; 1187 result = strtoul(buf + 5, &endptr, 10); 1188 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1189 success = 1; 1190 done: 1191 if (successp) 1192 *successp = success; 1193 return (result); 1194 } 1195 1196 u_int16_t 1197 res_nametotype(const char *buf, int *successp) { 1198 unsigned long result; 1199 char *endptr; 1200 int success; 1201 1202 result = sym_ston(__p_type_syms, buf, &success); 1203 if (success) 1204 goto done; 1205 1206 if (strncasecmp(buf, "type", 4) != 0 || 1207 !isdigit((unsigned char)buf[4])) 1208 goto done; 1209 errno = 0; 1210 result = strtoul(buf + 4, &endptr, 10); 1211 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1212 success = 1; 1213 done: 1214 if (successp) 1215 *successp = success; 1216 return (result); 1217 } 1218 1219 /* 1220 * Weak aliases for applications that use certain private entry points, 1221 * and fail to include <resolv.h>. 1222 */ 1223 #undef fp_resstat 1224 __weak_reference(__fp_resstat, fp_resstat); 1225 #undef p_fqnname 1226 __weak_reference(__p_fqnname, p_fqnname); 1227 #undef sym_ston 1228 __weak_reference(__sym_ston, sym_ston); 1229 #undef sym_ntos 1230 __weak_reference(__sym_ntos, sym_ntos); 1231 #undef sym_ntop 1232 __weak_reference(__sym_ntop, sym_ntop); 1233 #undef dn_count_labels 1234 __weak_reference(__dn_count_labels, dn_count_labels); 1235 #undef p_secstodate 1236 __weak_reference(__p_secstodate, p_secstodate); 1237 1238 /*! \file */ 1239