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