1 /* 2 * Portions Copyright (C) 2004, 2005, 2008, 2009 Internet Systems Consortium, Inc. ("ISC") 3 * Portions Copyright (C) 1996-2003 Internet Software Consortium. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 15 * PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 /* 19 * Copyright (c) 1985 20 * The Regents of the University of California. All rights reserved. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the above copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 4. Neither the name of the University nor the names of its contributors 31 * may be used to endorse or promote products derived from this software 32 * without specific prior written permission. 33 * 34 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 35 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 36 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 37 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 38 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 39 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 40 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 41 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 42 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 43 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 44 * SUCH DAMAGE. 45 */ 46 47 /* 48 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 49 * 50 * Permission to use, copy, modify, and distribute this software for any 51 * purpose with or without fee is hereby granted, provided that the above 52 * copyright notice and this permission notice appear in all copies, and that 53 * the name of Digital Equipment Corporation not be used in advertising or 54 * publicity pertaining to distribution of the document or software without 55 * specific, written prior permission. 56 * 57 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 58 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 59 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 60 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 61 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 62 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 63 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 64 * SOFTWARE. 65 */ 66 67 /* 68 * Portions Copyright (c) 1995 by International Business Machines, Inc. 69 * 70 * International Business Machines, Inc. (hereinafter called IBM) grants 71 * permission under its copyrights to use, copy, modify, and distribute this 72 * Software with or without fee, provided that the above copyright notice and 73 * all paragraphs of this notice appear in all copies, and that the name of IBM 74 * not be used in connection with the marketing of any product incorporating 75 * the Software or modifications thereof, without specific, written prior 76 * permission. 77 * 78 * To the extent it has a right to do so, IBM grants an immunity from suit 79 * under its patents, if any, for the use, sale or manufacture of products to 80 * the extent that such products are used for performing Domain Name System 81 * dynamic updates in TCP/IP networks by means of the Software. No immunity is 82 * granted for any product per se or for any other function of any product. 83 * 84 * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES, 85 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 86 * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL, 87 * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING 88 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN 89 * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES. 90 */ 91 92 #if defined(LIBC_SCCS) && !defined(lint) 93 static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93"; 94 static const char rcsid[] = "$Id: res_debug.c,v 1.19 2009/02/26 11:20:20 tbox Exp $"; 95 #endif /* LIBC_SCCS and not lint */ 96 #include <sys/cdefs.h> 97 __FBSDID("$FreeBSD$"); 98 99 #include "port_before.h" 100 101 #include <sys/types.h> 102 #include <sys/param.h> 103 #include <sys/socket.h> 104 105 #include <netinet/in.h> 106 #include <arpa/inet.h> 107 #include <arpa/nameser.h> 108 109 #include <ctype.h> 110 #include <errno.h> 111 #include <math.h> 112 #include <netdb.h> 113 #include <resolv.h> 114 #include <resolv_mt.h> 115 #include <stdio.h> 116 #include <stdlib.h> 117 #include <string.h> 118 #include <time.h> 119 120 #include "port_after.h" 121 122 #ifdef SPRINTF_CHAR 123 # define SPRINTF(x) strlen(sprintf/**/x) 124 #else 125 # define SPRINTF(x) sprintf x 126 #endif 127 128 extern const char *_res_opcodes[]; 129 extern const char *_res_sectioncodes[]; 130 131 /*% 132 * Print the current options. 133 */ 134 void 135 fp_resstat(const res_state statp, FILE *file) { 136 u_long mask; 137 138 fprintf(file, ";; res options:"); 139 for (mask = 1; mask != 0U; mask <<= 1) 140 if (statp->options & mask) 141 fprintf(file, " %s", p_option(mask)); 142 putc('\n', file); 143 } 144 145 static void 146 do_section(const res_state statp, 147 ns_msg *handle, ns_sect section, 148 int pflag, FILE *file) 149 { 150 int n, sflag, rrnum; 151 static int buflen = 2048; 152 char *buf; 153 ns_opcode opcode; 154 ns_rr rr; 155 156 /* 157 * Print answer records. 158 */ 159 sflag = (statp->pfcode & pflag); 160 if (statp->pfcode && !sflag) 161 return; 162 163 buf = malloc(buflen); 164 if (buf == NULL) { 165 fprintf(file, ";; memory allocation failure\n"); 166 return; 167 } 168 169 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode); 170 rrnum = 0; 171 for (;;) { 172 if (ns_parserr(handle, section, rrnum, &rr)) { 173 if (errno != ENODEV) 174 fprintf(file, ";; ns_parserr: %s\n", 175 strerror(errno)); 176 else if (rrnum > 0 && sflag != 0 && 177 (statp->pfcode & RES_PRF_HEAD1)) 178 putc('\n', file); 179 goto cleanup; 180 } 181 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1)) 182 fprintf(file, ";; %s SECTION:\n", 183 p_section(section, opcode)); 184 if (section == ns_s_qd) 185 fprintf(file, ";;\t%s, type = %s, class = %s\n", 186 ns_rr_name(rr), 187 p_type(ns_rr_type(rr)), 188 p_class(ns_rr_class(rr))); 189 else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) { 190 u_int16_t optcode, optlen, rdatalen = ns_rr_rdlen(rr); 191 u_int32_t ttl = ns_rr_ttl(rr); 192 193 fprintf(file, 194 "; EDNS: version: %u, udp=%u, flags=%04x\n", 195 (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff); 196 197 while (rdatalen >= 4) { 198 const u_char *cp = ns_rr_rdata(rr); 199 int i; 200 201 GETSHORT(optcode, cp); 202 GETSHORT(optlen, cp); 203 204 if (optcode == NS_OPT_NSID) { 205 fputs("; NSID: ", file); 206 if (optlen == 0) { 207 fputs("; NSID\n", file); 208 } else { 209 fputs("; NSID: ", file); 210 for (i = 0; i < optlen; i++) 211 fprintf(file, "%02x ", 212 cp[i]); 213 fputs(" (",file); 214 for (i = 0; i < optlen; i++) 215 fprintf(file, "%c", 216 isprint(cp[i])? 217 cp[i] : '.'); 218 fputs(")\n", file); 219 } 220 } else { 221 if (optlen == 0) { 222 fprintf(file, "; OPT=%u\n", 223 optcode); 224 } else { 225 fprintf(file, "; OPT=%u: ", 226 optcode); 227 for (i = 0; i < optlen; i++) 228 fprintf(file, "%02x ", 229 cp[i]); 230 fputs(" (",file); 231 for (i = 0; i < optlen; i++) 232 fprintf(file, "%c", 233 isprint(cp[i]) ? 234 cp[i] : '.'); 235 fputs(")\n", file); 236 } 237 } 238 rdatalen -= 4 + optlen; 239 } 240 } else { 241 n = ns_sprintrr(handle, &rr, NULL, NULL, 242 buf, buflen); 243 if (n < 0) { 244 if (errno == ENOSPC) { 245 free(buf); 246 buf = NULL; 247 if (buflen < 131072) 248 buf = malloc(buflen += 1024); 249 if (buf == NULL) { 250 fprintf(file, 251 ";; memory allocation failure\n"); 252 return; 253 } 254 continue; 255 } 256 fprintf(file, ";; ns_sprintrr: %s\n", 257 strerror(errno)); 258 goto cleanup; 259 } 260 fputs(buf, file); 261 fputc('\n', file); 262 } 263 rrnum++; 264 } 265 cleanup: 266 if (buf != NULL) 267 free(buf); 268 } 269 270 /*% 271 * Print the contents of a query. 272 * This is intended to be primarily a debugging routine. 273 */ 274 void 275 res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) { 276 ns_msg handle; 277 int qdcount, ancount, nscount, arcount; 278 u_int opcode, rcode, id; 279 280 if (ns_initparse(msg, len, &handle) < 0) { 281 fprintf(file, ";; ns_initparse: %s\n", strerror(errno)); 282 return; 283 } 284 opcode = ns_msg_getflag(handle, ns_f_opcode); 285 rcode = ns_msg_getflag(handle, ns_f_rcode); 286 id = ns_msg_id(handle); 287 qdcount = ns_msg_count(handle, ns_s_qd); 288 ancount = ns_msg_count(handle, ns_s_an); 289 nscount = ns_msg_count(handle, ns_s_ns); 290 arcount = ns_msg_count(handle, ns_s_ar); 291 292 /* 293 * Print header fields. 294 */ 295 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode) 296 fprintf(file, 297 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n", 298 _res_opcodes[opcode], p_rcode(rcode), id); 299 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX)) 300 putc(';', file); 301 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) { 302 fprintf(file, "; flags:"); 303 if (ns_msg_getflag(handle, ns_f_qr)) 304 fprintf(file, " qr"); 305 if (ns_msg_getflag(handle, ns_f_aa)) 306 fprintf(file, " aa"); 307 if (ns_msg_getflag(handle, ns_f_tc)) 308 fprintf(file, " tc"); 309 if (ns_msg_getflag(handle, ns_f_rd)) 310 fprintf(file, " rd"); 311 if (ns_msg_getflag(handle, ns_f_ra)) 312 fprintf(file, " ra"); 313 if (ns_msg_getflag(handle, ns_f_z)) 314 fprintf(file, " ??"); 315 if (ns_msg_getflag(handle, ns_f_ad)) 316 fprintf(file, " ad"); 317 if (ns_msg_getflag(handle, ns_f_cd)) 318 fprintf(file, " cd"); 319 } 320 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) { 321 fprintf(file, "; %s: %d", 322 p_section(ns_s_qd, opcode), qdcount); 323 fprintf(file, ", %s: %d", 324 p_section(ns_s_an, opcode), ancount); 325 fprintf(file, ", %s: %d", 326 p_section(ns_s_ns, opcode), nscount); 327 fprintf(file, ", %s: %d", 328 p_section(ns_s_ar, opcode), arcount); 329 } 330 if ((!statp->pfcode) || (statp->pfcode & 331 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) { 332 putc('\n',file); 333 } 334 /* 335 * Print the various sections. 336 */ 337 do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file); 338 do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file); 339 do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file); 340 do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file); 341 if (qdcount == 0 && ancount == 0 && 342 nscount == 0 && arcount == 0) 343 putc('\n', file); 344 } 345 346 const u_char * 347 p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) { 348 char name[MAXDNAME]; 349 int n; 350 351 if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0) 352 return (NULL); 353 if (name[0] == '\0') 354 putc('.', file); 355 else 356 fputs(name, file); 357 return (cp + n); 358 } 359 360 const u_char * 361 p_cdname(const u_char *cp, const u_char *msg, FILE *file) { 362 return (p_cdnname(cp, msg, PACKETSZ, file)); 363 } 364 365 /*% 366 * Return a fully-qualified domain name from a compressed name (with 367 length supplied). */ 368 369 const u_char * 370 p_fqnname(cp, msg, msglen, name, namelen) 371 const u_char *cp, *msg; 372 int msglen; 373 char *name; 374 int namelen; 375 { 376 int n, newlen; 377 378 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0) 379 return (NULL); 380 newlen = strlen(name); 381 if (newlen == 0 || name[newlen - 1] != '.') { 382 if (newlen + 1 >= namelen) /*%< Lack space for final dot */ 383 return (NULL); 384 else 385 strcpy(name + newlen, "."); 386 } 387 return (cp + n); 388 } 389 390 /* XXX: the rest of these functions need to become length-limited, too. */ 391 392 const u_char * 393 p_fqname(const u_char *cp, const u_char *msg, FILE *file) { 394 char name[MAXDNAME]; 395 const u_char *n; 396 397 n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name); 398 if (n == NULL) 399 return (NULL); 400 fputs(name, file); 401 return (n); 402 } 403 404 /*% 405 * Names of RR classes and qclasses. Classes and qclasses are the same, except 406 * that C_ANY is a qclass but not a class. (You can ask for records of class 407 * C_ANY, but you can't have any records of that class in the database.) 408 */ 409 const struct res_sym __p_class_syms[] = { 410 {C_IN, "IN", (char *)0}, 411 {C_CHAOS, "CH", (char *)0}, 412 {C_CHAOS, "CHAOS", (char *)0}, 413 {C_HS, "HS", (char *)0}, 414 {C_HS, "HESIOD", (char *)0}, 415 {C_ANY, "ANY", (char *)0}, 416 {C_NONE, "NONE", (char *)0}, 417 {C_IN, (char *)0, (char *)0} 418 }; 419 420 /*% 421 * Names of message sections. 422 */ 423 static const struct res_sym __p_default_section_syms[] = { 424 {ns_s_qd, "QUERY", (char *)0}, 425 {ns_s_an, "ANSWER", (char *)0}, 426 {ns_s_ns, "AUTHORITY", (char *)0}, 427 {ns_s_ar, "ADDITIONAL", (char *)0}, 428 {0, (char *)0, (char *)0} 429 }; 430 431 static const struct res_sym __p_update_section_syms[] = { 432 {S_ZONE, "ZONE", (char *)0}, 433 {S_PREREQ, "PREREQUISITE", (char *)0}, 434 {S_UPDATE, "UPDATE", (char *)0}, 435 {S_ADDT, "ADDITIONAL", (char *)0}, 436 {0, (char *)0, (char *)0} 437 }; 438 439 const struct res_sym __p_key_syms[] = { 440 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"}, 441 {NS_ALG_DH, "DH", "Diffie Hellman"}, 442 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"}, 443 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"}, 444 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"}, 445 {0, NULL, NULL} 446 }; 447 448 const struct res_sym __p_cert_syms[] = { 449 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"}, 450 {cert_t_spki, "SPKI", "SPKI certificate"}, 451 {cert_t_pgp, "PGP", "PGP certificate"}, 452 {cert_t_url, "URL", "URL Private"}, 453 {cert_t_oid, "OID", "OID Private"}, 454 {0, NULL, NULL} 455 }; 456 457 /*% 458 * Names of RR types and qtypes. Types and qtypes are the same, except 459 * that T_ANY is a qtype but not a type. (You can ask for records of type 460 * T_ANY, but you can't have any records of that type in the database.) 461 */ 462 const struct res_sym __p_type_syms[] = { 463 {ns_t_a, "A", "address"}, 464 {ns_t_ns, "NS", "name server"}, 465 {ns_t_md, "MD", "mail destination (deprecated)"}, 466 {ns_t_mf, "MF", "mail forwarder (deprecated)"}, 467 {ns_t_cname, "CNAME", "canonical name"}, 468 {ns_t_soa, "SOA", "start of authority"}, 469 {ns_t_mb, "MB", "mailbox"}, 470 {ns_t_mg, "MG", "mail group member"}, 471 {ns_t_mr, "MR", "mail rename"}, 472 {ns_t_null, "NULL", "null"}, 473 {ns_t_wks, "WKS", "well-known service (deprecated)"}, 474 {ns_t_ptr, "PTR", "domain name pointer"}, 475 {ns_t_hinfo, "HINFO", "host information"}, 476 {ns_t_minfo, "MINFO", "mailbox information"}, 477 {ns_t_mx, "MX", "mail exchanger"}, 478 {ns_t_txt, "TXT", "text"}, 479 {ns_t_rp, "RP", "responsible person"}, 480 {ns_t_afsdb, "AFSDB", "DCE or AFS server"}, 481 {ns_t_x25, "X25", "X25 address"}, 482 {ns_t_isdn, "ISDN", "ISDN address"}, 483 {ns_t_rt, "RT", "router"}, 484 {ns_t_nsap, "NSAP", "nsap address"}, 485 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"}, 486 {ns_t_sig, "SIG", "signature"}, 487 {ns_t_key, "KEY", "key"}, 488 {ns_t_px, "PX", "mapping information"}, 489 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"}, 490 {ns_t_aaaa, "AAAA", "IPv6 address"}, 491 {ns_t_loc, "LOC", "location"}, 492 {ns_t_nxt, "NXT", "next valid name (unimplemented)"}, 493 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"}, 494 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"}, 495 {ns_t_srv, "SRV", "server selection"}, 496 {ns_t_atma, "ATMA", "ATM address (unimplemented)"}, 497 {ns_t_naptr, "NAPTR", "naptr"}, 498 {ns_t_kx, "KX", "key exchange"}, 499 {ns_t_cert, "CERT", "certificate"}, 500 {ns_t_a6, "A", "IPv6 address (experminental)"}, 501 {ns_t_dname, "DNAME", "non-terminal redirection"}, 502 {ns_t_opt, "OPT", "opt"}, 503 {ns_t_apl, "apl", "apl"}, 504 {ns_t_ds, "DS", "delegation signer"}, 505 {ns_t_sshfp, "SSFP", "SSH fingerprint"}, 506 {ns_t_ipseckey, "IPSECKEY", "IPSEC key"}, 507 {ns_t_rrsig, "RRSIG", "rrsig"}, 508 {ns_t_nsec, "NSEC", "nsec"}, 509 {ns_t_dnskey, "DNSKEY", "DNS key"}, 510 {ns_t_dhcid, "DHCID", "dynamic host configuration identifier"}, 511 {ns_t_nsec3, "NSEC3", "nsec3"}, 512 {ns_t_nsec3param, "NSEC3PARAM", "NSEC3 parameters"}, 513 {ns_t_hip, "HIP", "host identity protocol"}, 514 {ns_t_spf, "SPF", "sender policy framework"}, 515 {ns_t_tkey, "TKEY", "tkey"}, 516 {ns_t_tsig, "TSIG", "transaction signature"}, 517 {ns_t_ixfr, "IXFR", "incremental zone transfer"}, 518 {ns_t_axfr, "AXFR", "zone transfer"}, 519 {ns_t_zxfr, "ZXFR", "compressed zone transfer"}, 520 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"}, 521 {ns_t_maila, "MAILA", "mail agent (deprecated)"}, 522 {ns_t_naptr, "NAPTR", "URN Naming Authority"}, 523 {ns_t_kx, "KX", "Key Exchange"}, 524 {ns_t_cert, "CERT", "Certificate"}, 525 {ns_t_a6, "A6", "IPv6 Address"}, 526 {ns_t_dname, "DNAME", "dname"}, 527 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"}, 528 {ns_t_opt, "OPT", "EDNS Options"}, 529 {ns_t_any, "ANY", "\"any\""}, 530 {ns_t_dlv, "DLV", "DNSSEC look-aside validation"}, 531 {0, NULL, NULL} 532 }; 533 534 /*% 535 * Names of DNS rcodes. 536 */ 537 const struct res_sym __p_rcode_syms[] = { 538 {ns_r_noerror, "NOERROR", "no error"}, 539 {ns_r_formerr, "FORMERR", "format error"}, 540 {ns_r_servfail, "SERVFAIL", "server failed"}, 541 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"}, 542 {ns_r_notimpl, "NOTIMP", "not implemented"}, 543 {ns_r_refused, "REFUSED", "refused"}, 544 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"}, 545 {ns_r_yxrrset, "YXRRSET", "rrset exists"}, 546 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"}, 547 {ns_r_notauth, "NOTAUTH", "not authoritative"}, 548 {ns_r_notzone, "NOTZONE", "Not in zone"}, 549 {ns_r_max, "", ""}, 550 {ns_r_badsig, "BADSIG", "bad signature"}, 551 {ns_r_badkey, "BADKEY", "bad key"}, 552 {ns_r_badtime, "BADTIME", "bad time"}, 553 {0, NULL, NULL} 554 }; 555 556 int 557 sym_ston(const struct res_sym *syms, const char *name, int *success) { 558 for ((void)NULL; syms->name != 0; syms++) { 559 if (strcasecmp (name, syms->name) == 0) { 560 if (success) 561 *success = 1; 562 return (syms->number); 563 } 564 } 565 if (success) 566 *success = 0; 567 return (syms->number); /*%< The default value. */ 568 } 569 570 const char * 571 sym_ntos(const struct res_sym *syms, int number, int *success) { 572 char *unname = sym_ntos_unname; 573 574 for ((void)NULL; syms->name != 0; syms++) { 575 if (number == syms->number) { 576 if (success) 577 *success = 1; 578 return (syms->name); 579 } 580 } 581 582 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 583 if (success) 584 *success = 0; 585 return (unname); 586 } 587 588 const char * 589 sym_ntop(const struct res_sym *syms, int number, int *success) { 590 char *unname = sym_ntop_unname; 591 592 for ((void)NULL; syms->name != 0; syms++) { 593 if (number == syms->number) { 594 if (success) 595 *success = 1; 596 return (syms->humanname); 597 } 598 } 599 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 600 if (success) 601 *success = 0; 602 return (unname); 603 } 604 605 /*% 606 * Return a string for the type. 607 */ 608 const char * 609 p_type(int type) { 610 int success; 611 const char *result; 612 static char typebuf[20]; 613 614 result = sym_ntos(__p_type_syms, type, &success); 615 if (success) 616 return (result); 617 if (type < 0 || type > 0xffff) 618 return ("BADTYPE"); 619 sprintf(typebuf, "TYPE%d", type); 620 return (typebuf); 621 } 622 623 /*% 624 * Return a string for the type. 625 */ 626 const char * 627 p_section(int section, int opcode) { 628 const struct res_sym *symbols; 629 630 switch (opcode) { 631 case ns_o_update: 632 symbols = __p_update_section_syms; 633 break; 634 default: 635 symbols = __p_default_section_syms; 636 break; 637 } 638 return (sym_ntos(symbols, section, (int *)0)); 639 } 640 641 /*% 642 * Return a mnemonic for class. 643 */ 644 const char * 645 p_class(int class) { 646 int success; 647 const char *result; 648 static char classbuf[20]; 649 650 result = sym_ntos(__p_class_syms, class, &success); 651 if (success) 652 return (result); 653 if (class < 0 || class > 0xffff) 654 return ("BADCLASS"); 655 sprintf(classbuf, "CLASS%d", class); 656 return (classbuf); 657 } 658 659 /*% 660 * Return a mnemonic for an option 661 */ 662 const char * 663 p_option(u_long option) { 664 char *nbuf = p_option_nbuf; 665 666 switch (option) { 667 case RES_INIT: return "init"; 668 case RES_DEBUG: return "debug"; 669 case RES_AAONLY: return "aaonly(unimpl)"; 670 case RES_USEVC: return "usevc"; 671 case RES_PRIMARY: return "primry(unimpl)"; 672 case RES_IGNTC: return "igntc"; 673 case RES_RECURSE: return "recurs"; 674 case RES_DEFNAMES: return "defnam"; 675 case RES_STAYOPEN: return "styopn"; 676 case RES_DNSRCH: return "dnsrch"; 677 case RES_INSECURE1: return "insecure1"; 678 case RES_INSECURE2: return "insecure2"; 679 case RES_NOALIASES: return "noaliases"; 680 case RES_USE_INET6: return "inet6"; 681 #ifdef RES_USE_EDNS0 /*%< KAME extension */ 682 case RES_USE_EDNS0: return "edns0"; 683 case RES_NSID: return "nsid"; 684 #endif 685 #ifdef RES_USE_DNAME 686 case RES_USE_DNAME: return "dname"; 687 #endif 688 #ifdef RES_USE_DNSSEC 689 case RES_USE_DNSSEC: return "dnssec"; 690 #endif 691 #ifdef RES_NOTLDQUERY 692 case RES_NOTLDQUERY: return "no-tld-query"; 693 #endif 694 #ifdef RES_NO_NIBBLE2 695 case RES_NO_NIBBLE2: return "no-nibble2"; 696 #endif 697 /* XXX nonreentrant */ 698 default: sprintf(nbuf, "?0x%lx?", (u_long)option); 699 return (nbuf); 700 } 701 } 702 703 /*% 704 * Return a mnemonic for a time to live. 705 */ 706 const char * 707 p_time(u_int32_t value) { 708 char *nbuf = p_time_nbuf; 709 710 if (ns_format_ttl(value, nbuf, sizeof nbuf) < 0) 711 sprintf(nbuf, "%u", value); 712 return (nbuf); 713 } 714 715 /*% 716 * Return a string for the rcode. 717 */ 718 const char * 719 p_rcode(int rcode) { 720 return (sym_ntos(__p_rcode_syms, rcode, (int *)0)); 721 } 722 723 /*% 724 * Return a string for a res_sockaddr_union. 725 */ 726 const char * 727 p_sockun(union res_sockaddr_union u, char *buf, size_t size) { 728 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"]; 729 730 switch (u.sin.sin_family) { 731 case AF_INET: 732 inet_ntop(AF_INET, &u.sin.sin_addr, ret, sizeof ret); 733 break; 734 #ifdef HAS_INET6_STRUCTS 735 case AF_INET6: 736 inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret); 737 break; 738 #endif 739 default: 740 sprintf(ret, "[af%d]", u.sin.sin_family); 741 break; 742 } 743 if (size > 0U) { 744 strncpy(buf, ret, size - 1); 745 buf[size - 1] = '0'; 746 } 747 return (buf); 748 } 749 750 /*% 751 * routines to convert between on-the-wire RR format and zone file format. 752 * Does not contain conversion to/from decimal degrees; divide or multiply 753 * by 60*60*1000 for that. 754 */ 755 756 static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000, 757 1000000,10000000,100000000,1000000000}; 758 759 /*% takes an XeY precision/size value, returns a string representation. */ 760 static const char * 761 precsize_ntoa(prec) 762 u_int8_t prec; 763 { 764 char *retbuf = precsize_ntoa_retbuf; 765 unsigned long val; 766 int mantissa, exponent; 767 768 mantissa = (int)((prec >> 4) & 0x0f) % 10; 769 exponent = (int)((prec >> 0) & 0x0f) % 10; 770 771 val = mantissa * poweroften[exponent]; 772 773 (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100); 774 return (retbuf); 775 } 776 777 /*% converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */ 778 static u_int8_t 779 precsize_aton(const char **strptr) { 780 unsigned int mval = 0, cmval = 0; 781 u_int8_t retval = 0; 782 const char *cp; 783 int exponent; 784 int mantissa; 785 786 cp = *strptr; 787 788 while (isdigit((unsigned char)*cp)) 789 mval = mval * 10 + (*cp++ - '0'); 790 791 if (*cp == '.') { /*%< centimeters */ 792 cp++; 793 if (isdigit((unsigned char)*cp)) { 794 cmval = (*cp++ - '0') * 10; 795 if (isdigit((unsigned char)*cp)) { 796 cmval += (*cp++ - '0'); 797 } 798 } 799 } 800 cmval = (mval * 100) + cmval; 801 802 for (exponent = 0; exponent < 9; exponent++) 803 if (cmval < poweroften[exponent+1]) 804 break; 805 806 mantissa = cmval / poweroften[exponent]; 807 if (mantissa > 9) 808 mantissa = 9; 809 810 retval = (mantissa << 4) | exponent; 811 812 *strptr = cp; 813 814 return (retval); 815 } 816 817 /*% converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */ 818 static u_int32_t 819 latlon2ul(const char **latlonstrptr, int *which) { 820 const char *cp; 821 u_int32_t retval; 822 int deg = 0, min = 0, secs = 0, secsfrac = 0; 823 824 cp = *latlonstrptr; 825 826 while (isdigit((unsigned char)*cp)) 827 deg = deg * 10 + (*cp++ - '0'); 828 829 while (isspace((unsigned char)*cp)) 830 cp++; 831 832 if (!(isdigit((unsigned char)*cp))) 833 goto fndhemi; 834 835 while (isdigit((unsigned char)*cp)) 836 min = min * 10 + (*cp++ - '0'); 837 838 while (isspace((unsigned char)*cp)) 839 cp++; 840 841 if (!(isdigit((unsigned char)*cp))) 842 goto fndhemi; 843 844 while (isdigit((unsigned char)*cp)) 845 secs = secs * 10 + (*cp++ - '0'); 846 847 if (*cp == '.') { /*%< decimal seconds */ 848 cp++; 849 if (isdigit((unsigned char)*cp)) { 850 secsfrac = (*cp++ - '0') * 100; 851 if (isdigit((unsigned char)*cp)) { 852 secsfrac += (*cp++ - '0') * 10; 853 if (isdigit((unsigned char)*cp)) { 854 secsfrac += (*cp++ - '0'); 855 } 856 } 857 } 858 } 859 860 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 861 cp++; 862 863 while (isspace((unsigned char)*cp)) 864 cp++; 865 866 fndhemi: 867 switch (*cp) { 868 case 'N': case 'n': 869 case 'E': case 'e': 870 retval = ((unsigned)1<<31) 871 + (((((deg * 60) + min) * 60) + secs) * 1000) 872 + secsfrac; 873 break; 874 case 'S': case 's': 875 case 'W': case 'w': 876 retval = ((unsigned)1<<31) 877 - (((((deg * 60) + min) * 60) + secs) * 1000) 878 - secsfrac; 879 break; 880 default: 881 retval = 0; /*%< invalid value -- indicates error */ 882 break; 883 } 884 885 switch (*cp) { 886 case 'N': case 'n': 887 case 'S': case 's': 888 *which = 1; /*%< latitude */ 889 break; 890 case 'E': case 'e': 891 case 'W': case 'w': 892 *which = 2; /*%< longitude */ 893 break; 894 default: 895 *which = 0; /*%< error */ 896 break; 897 } 898 899 cp++; /*%< skip the hemisphere */ 900 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 901 cp++; 902 903 while (isspace((unsigned char)*cp)) /*%< move to next field */ 904 cp++; 905 906 *latlonstrptr = cp; 907 908 return (retval); 909 } 910 911 /*% 912 * converts a zone file representation in a string to an RDATA on-the-wire 913 * representation. */ 914 int 915 loc_aton(ascii, binary) 916 const char *ascii; 917 u_char *binary; 918 { 919 const char *cp, *maxcp; 920 u_char *bcp; 921 922 u_int32_t latit = 0, longit = 0, alt = 0; 923 u_int32_t lltemp1 = 0, lltemp2 = 0; 924 int altmeters = 0, altfrac = 0, altsign = 1; 925 u_int8_t hp = 0x16; /*%< default = 1e6 cm = 10000.00m = 10km */ 926 u_int8_t vp = 0x13; /*%< default = 1e3 cm = 10.00m */ 927 u_int8_t siz = 0x12; /*%< default = 1e2 cm = 1.00m */ 928 int which1 = 0, which2 = 0; 929 930 cp = ascii; 931 maxcp = cp + strlen(ascii); 932 933 lltemp1 = latlon2ul(&cp, &which1); 934 935 lltemp2 = latlon2ul(&cp, &which2); 936 937 switch (which1 + which2) { 938 case 3: /*%< 1 + 2, the only valid combination */ 939 if ((which1 == 1) && (which2 == 2)) { /*%< normal case */ 940 latit = lltemp1; 941 longit = lltemp2; 942 } else if ((which1 == 2) && (which2 == 1)) { /*%< reversed */ 943 longit = lltemp1; 944 latit = lltemp2; 945 } else { /*%< some kind of brokenness */ 946 return (0); 947 } 948 break; 949 default: /*%< we didn't get one of each */ 950 return (0); 951 } 952 953 /* altitude */ 954 if (*cp == '-') { 955 altsign = -1; 956 cp++; 957 } 958 959 if (*cp == '+') 960 cp++; 961 962 while (isdigit((unsigned char)*cp)) 963 altmeters = altmeters * 10 + (*cp++ - '0'); 964 965 if (*cp == '.') { /*%< decimal meters */ 966 cp++; 967 if (isdigit((unsigned char)*cp)) { 968 altfrac = (*cp++ - '0') * 10; 969 if (isdigit((unsigned char)*cp)) { 970 altfrac += (*cp++ - '0'); 971 } 972 } 973 } 974 975 alt = (10000000 + (altsign * (altmeters * 100 + altfrac))); 976 977 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 978 cp++; 979 980 while (isspace((unsigned char)*cp) && (cp < maxcp)) 981 cp++; 982 983 if (cp >= maxcp) 984 goto defaults; 985 986 siz = precsize_aton(&cp); 987 988 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 989 cp++; 990 991 while (isspace((unsigned char)*cp) && (cp < maxcp)) 992 cp++; 993 994 if (cp >= maxcp) 995 goto defaults; 996 997 hp = precsize_aton(&cp); 998 999 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 1000 cp++; 1001 1002 while (isspace((unsigned char)*cp) && (cp < maxcp)) 1003 cp++; 1004 1005 if (cp >= maxcp) 1006 goto defaults; 1007 1008 vp = precsize_aton(&cp); 1009 1010 defaults: 1011 1012 bcp = binary; 1013 *bcp++ = (u_int8_t) 0; /*%< version byte */ 1014 *bcp++ = siz; 1015 *bcp++ = hp; 1016 *bcp++ = vp; 1017 PUTLONG(latit,bcp); 1018 PUTLONG(longit,bcp); 1019 PUTLONG(alt,bcp); 1020 1021 return (16); /*%< size of RR in octets */ 1022 } 1023 1024 /*% takes an on-the-wire LOC RR and formats it in a human readable format. */ 1025 const char * 1026 loc_ntoa(binary, ascii) 1027 const u_char *binary; 1028 char *ascii; 1029 { 1030 static const char *error = "?"; 1031 static char tmpbuf[sizeof 1032 "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"]; 1033 const u_char *cp = binary; 1034 1035 int latdeg, latmin, latsec, latsecfrac; 1036 int longdeg, longmin, longsec, longsecfrac; 1037 char northsouth, eastwest; 1038 const char *altsign; 1039 int altmeters, altfrac; 1040 1041 const u_int32_t referencealt = 100000 * 100; 1042 1043 int32_t latval, longval, altval; 1044 u_int32_t templ; 1045 u_int8_t sizeval, hpval, vpval, versionval; 1046 1047 char *sizestr, *hpstr, *vpstr; 1048 1049 versionval = *cp++; 1050 1051 if (ascii == NULL) 1052 ascii = tmpbuf; 1053 1054 if (versionval) { 1055 (void) sprintf(ascii, "; error: unknown LOC RR version"); 1056 return (ascii); 1057 } 1058 1059 sizeval = *cp++; 1060 1061 hpval = *cp++; 1062 vpval = *cp++; 1063 1064 GETLONG(templ, cp); 1065 latval = (templ - ((unsigned)1<<31)); 1066 1067 GETLONG(templ, cp); 1068 longval = (templ - ((unsigned)1<<31)); 1069 1070 GETLONG(templ, cp); 1071 if (templ < referencealt) { /*%< below WGS 84 spheroid */ 1072 altval = referencealt - templ; 1073 altsign = "-"; 1074 } else { 1075 altval = templ - referencealt; 1076 altsign = ""; 1077 } 1078 1079 if (latval < 0) { 1080 northsouth = 'S'; 1081 latval = -latval; 1082 } else 1083 northsouth = 'N'; 1084 1085 latsecfrac = latval % 1000; 1086 latval = latval / 1000; 1087 latsec = latval % 60; 1088 latval = latval / 60; 1089 latmin = latval % 60; 1090 latval = latval / 60; 1091 latdeg = latval; 1092 1093 if (longval < 0) { 1094 eastwest = 'W'; 1095 longval = -longval; 1096 } else 1097 eastwest = 'E'; 1098 1099 longsecfrac = longval % 1000; 1100 longval = longval / 1000; 1101 longsec = longval % 60; 1102 longval = longval / 60; 1103 longmin = longval % 60; 1104 longval = longval / 60; 1105 longdeg = longval; 1106 1107 altfrac = altval % 100; 1108 altmeters = (altval / 100); 1109 1110 sizestr = strdup(precsize_ntoa(sizeval)); 1111 hpstr = strdup(precsize_ntoa(hpval)); 1112 vpstr = strdup(precsize_ntoa(vpval)); 1113 1114 sprintf(ascii, 1115 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm", 1116 latdeg, latmin, latsec, latsecfrac, northsouth, 1117 longdeg, longmin, longsec, longsecfrac, eastwest, 1118 altsign, altmeters, altfrac, 1119 (sizestr != NULL) ? sizestr : error, 1120 (hpstr != NULL) ? hpstr : error, 1121 (vpstr != NULL) ? vpstr : error); 1122 1123 if (sizestr != NULL) 1124 free(sizestr); 1125 if (hpstr != NULL) 1126 free(hpstr); 1127 if (vpstr != NULL) 1128 free(vpstr); 1129 1130 return (ascii); 1131 } 1132 1133 1134 /*% Return the number of DNS hierarchy levels in the name. */ 1135 int 1136 dn_count_labels(const char *name) { 1137 int i, len, count; 1138 1139 len = strlen(name); 1140 for (i = 0, count = 0; i < len; i++) { 1141 /* XXX need to check for \. or use named's nlabels(). */ 1142 if (name[i] == '.') 1143 count++; 1144 } 1145 1146 /* don't count initial wildcard */ 1147 if (name[0] == '*') 1148 if (count) 1149 count--; 1150 1151 /* don't count the null label for root. */ 1152 /* if terminating '.' not found, must adjust */ 1153 /* count to include last label */ 1154 if (len > 0 && name[len-1] != '.') 1155 count++; 1156 return (count); 1157 } 1158 1159 /*% 1160 * Make dates expressed in seconds-since-Jan-1-1970 easy to read. 1161 * SIG records are required to be printed like this, by the Secure DNS RFC. 1162 */ 1163 char * 1164 p_secstodate (u_long secs) { 1165 char *output = p_secstodate_output; 1166 time_t clock = secs; 1167 struct tm *time; 1168 #ifdef HAVE_TIME_R 1169 struct tm res; 1170 1171 time = gmtime_r(&clock, &res); 1172 #else 1173 time = gmtime(&clock); 1174 #endif 1175 time->tm_year += 1900; 1176 time->tm_mon += 1; 1177 sprintf(output, "%04d%02d%02d%02d%02d%02d", 1178 time->tm_year, time->tm_mon, time->tm_mday, 1179 time->tm_hour, time->tm_min, time->tm_sec); 1180 return (output); 1181 } 1182 1183 u_int16_t 1184 res_nametoclass(const char *buf, int *successp) { 1185 unsigned long result; 1186 char *endptr; 1187 int success; 1188 1189 result = sym_ston(__p_class_syms, buf, &success); 1190 if (success) 1191 goto done; 1192 1193 if (strncasecmp(buf, "CLASS", 5) != 0 || 1194 !isdigit((unsigned char)buf[5])) 1195 goto done; 1196 errno = 0; 1197 result = strtoul(buf + 5, &endptr, 10); 1198 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1199 success = 1; 1200 done: 1201 if (successp) 1202 *successp = success; 1203 return (result); 1204 } 1205 1206 u_int16_t 1207 res_nametotype(const char *buf, int *successp) { 1208 unsigned long result; 1209 char *endptr; 1210 int success; 1211 1212 result = sym_ston(__p_type_syms, buf, &success); 1213 if (success) 1214 goto done; 1215 1216 if (strncasecmp(buf, "type", 4) != 0 || 1217 !isdigit((unsigned char)buf[4])) 1218 goto done; 1219 errno = 0; 1220 result = strtoul(buf + 4, &endptr, 10); 1221 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1222 success = 1; 1223 done: 1224 if (successp) 1225 *successp = success; 1226 return (result); 1227 } 1228 1229 /* 1230 * Weak aliases for applications that use certain private entry points, 1231 * and fail to include <resolv.h>. 1232 */ 1233 #undef fp_resstat 1234 __weak_reference(__fp_resstat, fp_resstat); 1235 #undef p_fqnname 1236 __weak_reference(__p_fqnname, p_fqnname); 1237 #undef sym_ston 1238 __weak_reference(__sym_ston, sym_ston); 1239 #undef sym_ntos 1240 __weak_reference(__sym_ntos, sym_ntos); 1241 #undef sym_ntop 1242 __weak_reference(__sym_ntop, sym_ntop); 1243 #undef dn_count_labels 1244 __weak_reference(__dn_count_labels, dn_count_labels); 1245 #undef p_secstodate 1246 __weak_reference(__p_secstodate, p_secstodate); 1247 1248 /*! \file */ 1249