1 /* $NetBSD: res_debug.c,v 1.21 2026/04/08 20:22:06 christos Exp $ */ 2 3 /* 4 * Portions Copyright (C) 2004, 2005, 2008, 2009 Internet Systems Consortium, Inc. ("ISC") 5 * Portions Copyright (C) 1996-2003 Internet Software Consortium. 6 * 7 * Permission to use, copy, modify, and/or distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 12 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 13 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 14 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 16 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17 * PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /* 21 * Copyright (c) 1985 22 * The Regents of the University of California. All rights reserved. 23 * 24 * Redistribution and use in source and binary forms, with or without 25 * modification, are permitted provided that the following conditions 26 * are met: 27 * 1. Redistributions of source code must retain the above copyright 28 * notice, this list of conditions and the following disclaimer. 29 * 2. Redistributions in binary form must reproduce the above copyright 30 * notice, this list of conditions and the following disclaimer in the 31 * documentation and/or other materials provided with the distribution. 32 * 3. Neither the name of the University nor the names of its contributors 33 * may be used to endorse or promote products derived from this software 34 * without specific prior written permission. 35 * 36 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 37 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 39 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 40 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 41 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 42 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 44 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 45 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 46 * SUCH DAMAGE. 47 */ 48 49 /* 50 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 51 * 52 * Permission to use, copy, modify, and distribute this software for any 53 * purpose with or without fee is hereby granted, provided that the above 54 * copyright notice and this permission notice appear in all copies, and that 55 * the name of Digital Equipment Corporation not be used in advertising or 56 * publicity pertaining to distribution of the document or software without 57 * specific, written prior permission. 58 * 59 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 60 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 61 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 62 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 63 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 64 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 65 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 66 * SOFTWARE. 67 */ 68 69 /* 70 * Portions Copyright (c) 1995 by International Business Machines, Inc. 71 * 72 * International Business Machines, Inc. (hereinafter called IBM) grants 73 * permission under its copyrights to use, copy, modify, and distribute this 74 * Software with or without fee, provided that the above copyright notice and 75 * all paragraphs of this notice appear in all copies, and that the name of IBM 76 * not be used in connection with the marketing of any product incorporating 77 * the Software or modifications thereof, without specific, written prior 78 * permission. 79 * 80 * To the extent it has a right to do so, IBM grants an immunity from suit 81 * under its patents, if any, for the use, sale or manufacture of products to 82 * the extent that such products are used for performing Domain Name System 83 * dynamic updates in TCP/IP networks by means of the Software. No immunity is 84 * granted for any product per se or for any other function of any product. 85 * 86 * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES, 87 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 88 * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL, 89 * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING 90 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN 91 * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES. 92 */ 93 94 #include <sys/cdefs.h> 95 #if defined(LIBC_SCCS) && !defined(lint) 96 #ifdef notdef 97 static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93"; 98 static const char rcsid[] = "Id: res_debug.c,v 1.19 2009/02/26 11:20:20 tbox Exp"; 99 #else 100 __RCSID("$NetBSD: res_debug.c,v 1.21 2026/04/08 20:22:06 christos Exp $"); 101 #endif 102 #endif /* LIBC_SCCS and not lint */ 103 104 #include "port_before.h" 105 106 #include "namespace.h" 107 #include <sys/types.h> 108 #include <sys/param.h> 109 #include <sys/socket.h> 110 111 #include <netinet/in.h> 112 #include <arpa/inet.h> 113 #include <arpa/nameser.h> 114 115 #include <assert.h> 116 #include <ctype.h> 117 #include <errno.h> 118 #include <math.h> 119 #include <netdb.h> 120 #include <resolv.h> 121 #include <resolv_mt.h> 122 #include <stdio.h> 123 #include <stdlib.h> 124 #include <string.h> 125 #include <time.h> 126 127 #include "port_after.h" 128 129 extern const char *_res_opcodes[]; 130 extern const char *_res_sectioncodes[]; 131 132 #if 0 133 #ifdef __weak_alias 134 __weak_alias(res_pquery,__res_pquery) 135 __weak_alias(res_nametoclass,__res_nametoclass) 136 __weak_alias(res_nametotype,__res_nametotype) 137 #endif 138 #endif 139 140 #ifndef _LIBC 141 /*% 142 * Print the current options. 143 */ 144 void 145 fp_resstat(const res_state statp, FILE *file) { 146 u_long mask; 147 148 fprintf(file, ";; res options:"); 149 for (mask = 1; mask != 0U; mask <<= 1) 150 if (statp->options & mask) 151 fprintf(file, " %s", p_option(mask)); 152 putc('\n', file); 153 } 154 #endif 155 156 static void 157 do_section(const res_state statp, 158 ns_msg *handle, ns_sect section, 159 int pflag, FILE *file) 160 { 161 int n, sflag, rrnum; 162 static int buflen = 2048; 163 char *buf; 164 ns_opcode opcode; 165 ns_rr rr; 166 167 /* 168 * Print answer records. 169 */ 170 sflag = (int)(statp->pfcode & pflag); 171 if (statp->pfcode && !sflag) 172 return; 173 174 buf = malloc((size_t)buflen); 175 if (buf == NULL) { 176 fprintf(file, ";; memory allocation failure\n"); 177 return; 178 } 179 180 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode); 181 rrnum = 0; 182 for (;;) { 183 if (ns_parserr(handle, section, rrnum, &rr)) { 184 if (errno != ENODEV) 185 fprintf(file, ";; ns_parserr: %s\n", 186 strerror(errno)); 187 else if (rrnum > 0 && sflag != 0 && 188 (statp->pfcode & RES_PRF_HEAD1)) 189 putc('\n', file); 190 goto cleanup; 191 } 192 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1)) 193 fprintf(file, ";; %s SECTION:\n", 194 p_section(section, opcode)); 195 if (section == ns_s_qd) 196 fprintf(file, ";;\t%s, type = %s, class = %s\n", 197 ns_rr_name(rr), 198 p_type(ns_rr_type(rr)), 199 p_class(ns_rr_class(rr))); 200 else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) { 201 size_t rdatalen, ttl; 202 uint16_t optcode, optlen; 203 204 rdatalen = ns_rr_rdlen(rr); 205 ttl = ns_rr_ttl(rr); 206 207 fprintf(file, 208 "; EDNS: version: %zu, udp=%u, flags=%04zx\n", 209 (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff); 210 211 while (rdatalen >= 4) { 212 const u_char *cp = ns_rr_rdata(rr); 213 int i; 214 215 GETSHORT(optcode, cp); 216 GETSHORT(optlen, cp); 217 218 if (optcode == NS_OPT_NSID) { 219 fputs("; NSID: ", file); 220 if (optlen == 0) { 221 fputs("; NSID\n", file); 222 } else { 223 fputs("; NSID: ", file); 224 for (i = 0; i < optlen; i++) 225 fprintf(file, "%02x ", 226 cp[i]); 227 fputs(" (",file); 228 for (i = 0; i < optlen; i++) 229 fprintf(file, "%c", 230 isprint(cp[i])? 231 cp[i] : '.'); 232 fputs(")\n", file); 233 } 234 } else { 235 if (optlen == 0) { 236 fprintf(file, "; OPT=%u\n", 237 optcode); 238 } else { 239 fprintf(file, "; OPT=%u: ", 240 optcode); 241 for (i = 0; i < optlen; i++) 242 fprintf(file, "%02x ", 243 cp[i]); 244 fputs(" (",file); 245 for (i = 0; i < optlen; i++) 246 fprintf(file, "%c", 247 isprint(cp[i]) ? 248 cp[i] : '.'); 249 fputs(")\n", file); 250 } 251 } 252 rdatalen -= 4 + optlen; 253 } 254 } else { 255 n = ns_sprintrr(handle, &rr, NULL, NULL, 256 buf, (u_int)buflen); 257 if (n < 0) { 258 if (errno == ENOSPC) { 259 free(buf); 260 buf = NULL; 261 if (buflen < 131072) 262 buf = malloc((size_t)(buflen += 1024)); 263 if (buf == NULL) { 264 fprintf(file, 265 ";; memory allocation failure\n"); 266 return; 267 } 268 continue; 269 } 270 fprintf(file, ";; ns_sprintrr: %s\n", 271 strerror(errno)); 272 goto cleanup; 273 } 274 fputs(buf, file); 275 fputc('\n', file); 276 } 277 rrnum++; 278 } 279 cleanup: 280 if (buf != NULL) 281 free(buf); 282 } 283 284 /*% 285 * Print the contents of a query. 286 * This is intended to be primarily a debugging routine. 287 */ 288 void 289 res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) { 290 ns_msg handle; 291 int qdcount, ancount, nscount, arcount; 292 u_int opcode, rcode, id; 293 294 if (ns_initparse(msg, len, &handle) < 0) { 295 fprintf(file, ";; ns_initparse: %s\n", strerror(errno)); 296 return; 297 } 298 opcode = ns_msg_getflag(handle, ns_f_opcode); 299 rcode = ns_msg_getflag(handle, ns_f_rcode); 300 id = ns_msg_id(handle); 301 qdcount = ns_msg_count(handle, ns_s_qd); 302 ancount = ns_msg_count(handle, ns_s_an); 303 nscount = ns_msg_count(handle, ns_s_ns); 304 arcount = ns_msg_count(handle, ns_s_ar); 305 306 /* 307 * Print header fields. 308 */ 309 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode) 310 fprintf(file, 311 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n", 312 _res_opcodes[opcode], p_rcode((int)rcode), id); 313 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX)) 314 putc(';', file); 315 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) { 316 fprintf(file, "; flags:"); 317 if (ns_msg_getflag(handle, ns_f_qr)) 318 fprintf(file, " qr"); 319 if (ns_msg_getflag(handle, ns_f_aa)) 320 fprintf(file, " aa"); 321 if (ns_msg_getflag(handle, ns_f_tc)) 322 fprintf(file, " tc"); 323 if (ns_msg_getflag(handle, ns_f_rd)) 324 fprintf(file, " rd"); 325 if (ns_msg_getflag(handle, ns_f_ra)) 326 fprintf(file, " ra"); 327 if (ns_msg_getflag(handle, ns_f_z)) 328 fprintf(file, " ??"); 329 if (ns_msg_getflag(handle, ns_f_ad)) 330 fprintf(file, " ad"); 331 if (ns_msg_getflag(handle, ns_f_cd)) 332 fprintf(file, " cd"); 333 } 334 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) { 335 fprintf(file, "; %s: %d", 336 p_section(ns_s_qd, (int)opcode), qdcount); 337 fprintf(file, ", %s: %d", 338 p_section(ns_s_an, (int)opcode), ancount); 339 fprintf(file, ", %s: %d", 340 p_section(ns_s_ns, (int)opcode), nscount); 341 fprintf(file, ", %s: %d", 342 p_section(ns_s_ar, (int)opcode), arcount); 343 } 344 if ((!statp->pfcode) || (statp->pfcode & 345 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) { 346 putc('\n',file); 347 } 348 /* 349 * Print the various sections. 350 */ 351 do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file); 352 do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file); 353 do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file); 354 do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file); 355 if (qdcount == 0 && ancount == 0 && 356 nscount == 0 && arcount == 0) 357 putc('\n', file); 358 } 359 360 const u_char * 361 p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) { 362 char name[MAXDNAME]; 363 int n; 364 365 if ((n = dn_expand(msg, msg + len, cp, name, (int)sizeof name)) < 0) 366 return (NULL); 367 if (name[0] == '\0') 368 putc('.', file); 369 else 370 fputs(name, file); 371 return (cp + n); 372 } 373 374 const u_char * 375 p_cdname(const u_char *cp, const u_char *msg, FILE *file) { 376 return (p_cdnname(cp, msg, PACKETSZ, file)); 377 } 378 379 /*% 380 * Return a fully-qualified domain name from a compressed name (with 381 length supplied). */ 382 383 const u_char * 384 p_fqnname(const u_char *cp, const u_char *msg, int msglen, char *name, 385 int namelen) 386 { 387 int n; 388 size_t newlen; 389 390 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0) 391 return (NULL); 392 newlen = strlen(name); 393 if (newlen == 0 || name[newlen - 1] != '.') { 394 if ((int)newlen + 1 >= namelen) /*%< Lack space for final dot */ 395 return (NULL); 396 else 397 strcpy(name + newlen, "."); 398 } 399 return (cp + n); 400 } 401 402 /* XXX: the rest of these functions need to become length-limited, too. */ 403 404 const u_char * 405 p_fqname(const u_char *cp, const u_char *msg, FILE *file) { 406 char name[MAXDNAME]; 407 const u_char *n; 408 409 n = p_fqnname(cp, msg, MAXCDNAME, name, (int)sizeof name); 410 if (n == NULL) 411 return (NULL); 412 fputs(name, file); 413 return (n); 414 } 415 416 /*% 417 * Names of RR classes and qclasses. Classes and qclasses are the same, except 418 * that C_ANY is a qclass but not a class. (You can ask for records of class 419 * C_ANY, but you can't have any records of that class in the database.) 420 */ 421 const struct res_sym __p_class_syms[] = { 422 {C_IN, "IN", (char *)0}, 423 {C_CHAOS, "CH", (char *)0}, 424 {C_CHAOS, "CHAOS", (char *)0}, 425 {C_HS, "HS", (char *)0}, 426 {C_HS, "HESIOD", (char *)0}, 427 {C_ANY, "ANY", (char *)0}, 428 {C_NONE, "NONE", (char *)0}, 429 {C_IN, (char *)0, (char *)0} 430 }; 431 432 /*% 433 * Names of message sections. 434 */ 435 const struct res_sym __p_default_section_syms[] = { 436 {ns_s_qd, "QUERY", (char *)0}, 437 {ns_s_an, "ANSWER", (char *)0}, 438 {ns_s_ns, "AUTHORITY", (char *)0}, 439 {ns_s_ar, "ADDITIONAL", (char *)0}, 440 {0, (char *)0, (char *)0} 441 }; 442 443 const struct res_sym __p_update_section_syms[] = { 444 {S_ZONE, "ZONE", (char *)0}, 445 {S_PREREQ, "PREREQUISITE", (char *)0}, 446 {S_UPDATE, "UPDATE", (char *)0}, 447 {S_ADDT, "ADDITIONAL", (char *)0}, 448 {0, (char *)0, (char *)0} 449 }; 450 451 const struct res_sym __p_key_syms[] = { 452 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"}, 453 {NS_ALG_DH, "DH", "Diffie Hellman"}, 454 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"}, 455 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"}, 456 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"}, 457 {0, NULL, NULL} 458 }; 459 460 const struct res_sym __p_cert_syms[] = { 461 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"}, 462 {cert_t_spki, "SPKI", "SPKI certificate"}, 463 {cert_t_pgp, "PGP", "PGP certificate"}, 464 {cert_t_url, "URL", "URL Private"}, 465 {cert_t_oid, "OID", "OID Private"}, 466 {0, NULL, NULL} 467 }; 468 469 /*% 470 * Names of RR types and qtypes. Types and qtypes are the same, except 471 * that T_ANY is a qtype but not a type. (You can ask for records of type 472 * T_ANY, but you can't have any records of that type in the database.) 473 */ 474 const struct res_sym __p_type_syms[] = { 475 {ns_t_a, "A", "address"}, 476 {ns_t_ns, "NS", "name server"}, 477 {ns_t_md, "MD", "mail destination (deprecated)"}, 478 {ns_t_mf, "MF", "mail forwarder (deprecated)"}, 479 {ns_t_cname, "CNAME", "canonical name"}, 480 {ns_t_soa, "SOA", "start of authority"}, 481 {ns_t_mb, "MB", "mailbox"}, 482 {ns_t_mg, "MG", "mail group member"}, 483 {ns_t_mr, "MR", "mail rename"}, 484 {ns_t_null, "NULL", "null"}, 485 {ns_t_wks, "WKS", "well-known service (deprecated)"}, 486 {ns_t_ptr, "PTR", "domain name pointer"}, 487 {ns_t_hinfo, "HINFO", "host information"}, 488 {ns_t_minfo, "MINFO", "mailbox information"}, 489 {ns_t_mx, "MX", "mail exchanger"}, 490 {ns_t_txt, "TXT", "text"}, 491 {ns_t_rp, "RP", "responsible person"}, 492 {ns_t_afsdb, "AFSDB", "DCE or AFS server"}, 493 {ns_t_x25, "X25", "X25 address"}, 494 {ns_t_isdn, "ISDN", "ISDN address"}, 495 {ns_t_rt, "RT", "router"}, 496 {ns_t_nsap, "NSAP", "nsap address"}, 497 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"}, 498 {ns_t_sig, "SIG", "signature"}, 499 {ns_t_key, "KEY", "key"}, 500 {ns_t_px, "PX", "mapping information"}, 501 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"}, 502 {ns_t_aaaa, "AAAA", "IPv6 address"}, 503 {ns_t_loc, "LOC", "location"}, 504 {ns_t_nxt, "NXT", "next valid name (unimplemented)"}, 505 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"}, 506 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"}, 507 {ns_t_srv, "SRV", "server selection"}, 508 {ns_t_atma, "ATMA", "ATM address (unimplemented)"}, 509 {ns_t_naptr, "NAPTR", "naptr"}, 510 {ns_t_kx, "KX", "key exchange"}, 511 {ns_t_cert, "CERT", "certificate"}, 512 {ns_t_a6, "A", "IPv6 address (experimental)"}, 513 {ns_t_dname, "DNAME", "non-terminal redirection"}, 514 {ns_t_opt, "OPT", "opt"}, 515 {ns_t_apl, "apl", "apl"}, 516 {ns_t_ds, "DS", "delegation signer"}, 517 {ns_t_sshfp, "SSFP", "SSH fingerprint"}, 518 {ns_t_ipseckey, "IPSECKEY", "IPSEC key"}, 519 {ns_t_rrsig, "RRSIG", "rrsig"}, 520 {ns_t_nsec, "NSEC", "nsec"}, 521 {ns_t_dnskey, "DNSKEY", "DNS key"}, 522 {ns_t_dhcid, "DHCID", "dynamic host configuration identifier"}, 523 {ns_t_nsec3, "NSEC3", "nsec3"}, 524 {ns_t_nsec3param, "NSEC3PARAM", "NSEC3 parameters"}, 525 {ns_t_hip, "HIP", "host identity protocol"}, 526 {ns_t_spf, "SPF", "sender policy framework"}, 527 {ns_t_tkey, "TKEY", "tkey"}, 528 {ns_t_tsig, "TSIG", "transaction signature"}, 529 {ns_t_ixfr, "IXFR", "incremental zone transfer"}, 530 {ns_t_axfr, "AXFR", "zone transfer"}, 531 {ns_t_zxfr, "ZXFR", "compressed zone transfer"}, 532 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"}, 533 {ns_t_maila, "MAILA", "mail agent (deprecated)"}, 534 {ns_t_naptr, "NAPTR", "URN Naming Authority"}, 535 {ns_t_kx, "KX", "Key Exchange"}, 536 {ns_t_cert, "CERT", "Certificate"}, 537 {ns_t_a6, "A6", "IPv6 Address"}, 538 {ns_t_dname, "DNAME", "dname"}, 539 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"}, 540 {ns_t_opt, "OPT", "EDNS Options"}, 541 {ns_t_any, "ANY", "\"any\""}, 542 {ns_t_dlv, "DLV", "DNSSEC look-aside validation"}, 543 {0, NULL, NULL} 544 }; 545 546 /*% 547 * Names of DNS rcodes. 548 */ 549 const struct res_sym __p_rcode_syms[] = { 550 {ns_r_noerror, "NOERROR", "no error"}, 551 {ns_r_formerr, "FORMERR", "format error"}, 552 {ns_r_servfail, "SERVFAIL", "server failed"}, 553 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"}, 554 {ns_r_notimpl, "NOTIMP", "not implemented"}, 555 {ns_r_refused, "REFUSED", "refused"}, 556 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"}, 557 {ns_r_yxrrset, "YXRRSET", "rrset exists"}, 558 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"}, 559 {ns_r_notauth, "NOTAUTH", "not authoritative"}, 560 {ns_r_notzone, "NOTZONE", "Not in zone"}, 561 {ns_r_max, "", ""}, 562 {ns_r_badsig, "BADSIG", "bad signature"}, 563 {ns_r_badkey, "BADKEY", "bad key"}, 564 {ns_r_badtime, "BADTIME", "bad time"}, 565 {0, NULL, NULL} 566 }; 567 568 int 569 sym_ston(const struct res_sym *syms, const char *name, int *success) { 570 for (; syms->name != 0; syms++) { 571 if (strcasecmp (name, syms->name) == 0) { 572 if (success) 573 *success = 1; 574 return (syms->number); 575 } 576 } 577 if (success) 578 *success = 0; 579 return (syms->number); /*%< The default value. */ 580 } 581 582 const char * 583 sym_ntos(const struct res_sym *syms, int number, int *success) { 584 585 for (; syms->name != 0; syms++) { 586 if (number == syms->number) { 587 if (success) 588 *success = 1; 589 return (syms->name); 590 } 591 } 592 593 snprintf(sym_ntos_unname, sizeof(sym_ntos_unname), "%d", number); /*%< XXX nonreentrant */ 594 if (success) 595 *success = 0; 596 return sym_ntos_unname; 597 } 598 599 const char * 600 sym_ntop(const struct res_sym *syms, int number, int *success) { 601 602 for (; syms->name != 0; syms++) { 603 if (number == syms->number) { 604 if (success) 605 *success = 1; 606 return (syms->humanname); 607 } 608 } 609 snprintf(sym_ntop_unname, sizeof(sym_ntop_unname), "%d", number); /*%< XXX nonreentrant */ 610 if (success) 611 *success = 0; 612 return sym_ntop_unname; 613 } 614 615 /*% 616 * Return a string for the type. 617 */ 618 const char * 619 p_type(int type) { 620 int success; 621 const char *result; 622 static char typebuf[20]; 623 624 result = sym_ntos(__p_type_syms, type, &success); 625 if (success) 626 return (result); 627 if (type < 0 || type > 0xffff) 628 return ("BADTYPE"); 629 snprintf(typebuf, sizeof(typebuf), "TYPE%d", type); 630 return (typebuf); 631 } 632 633 /*% 634 * Return a string for the type. 635 */ 636 const char * 637 p_section(int section, int opcode) { 638 const struct res_sym *symbols; 639 640 switch (opcode) { 641 case ns_o_update: 642 symbols = __p_update_section_syms; 643 break; 644 default: 645 symbols = __p_default_section_syms; 646 break; 647 } 648 return (sym_ntos(symbols, section, (int *)0)); 649 } 650 651 /*% 652 * Return a mnemonic for class. 653 */ 654 const char * 655 p_class(int class) { 656 int success; 657 const char *result; 658 static char classbuf[20]; 659 660 result = sym_ntos(__p_class_syms, class, &success); 661 if (success) 662 return (result); 663 if (class < 0 || class > 0xffff) 664 return ("BADCLASS"); 665 snprintf(classbuf, sizeof(classbuf), "CLASS%d", class); 666 return (classbuf); 667 } 668 669 /*% 670 * Return a mnemonic for an option 671 */ 672 const char * 673 p_option(u_long option) { 674 675 switch (option) { 676 case RES_INIT: return "init"; 677 case RES_DEBUG: return "debug"; 678 case RES_AAONLY: return "aaonly(unimpl)"; 679 case RES_USEVC: return "usevc"; 680 case RES_PRIMARY: return "primary(unimpl)"; 681 case RES_IGNTC: return "igntc"; 682 case RES_RECURSE: return "recurs"; 683 case RES_DEFNAMES: return "defnam"; 684 case RES_STAYOPEN: return "styopn"; 685 case RES_DNSRCH: return "dnsrch"; 686 case RES_INSECURE1: return "insecure1"; 687 case RES_INSECURE2: return "insecure2"; 688 case RES_NOALIASES: return "noaliases"; 689 case RES_USE_INET6: return "inet6"; 690 #ifdef RES_USE_EDNS0 /*%< KAME extension */ 691 case RES_USE_EDNS0: return "edns0"; 692 case RES_NSID: return "nsid"; 693 #endif 694 #ifdef RES_USE_DNAME 695 case RES_USE_DNAME: return "dname"; 696 #endif 697 #ifdef RES_USE_DNSSEC 698 case RES_USE_DNSSEC: return "dnssec"; 699 #endif 700 #ifdef RES_NOTLDQUERY 701 case RES_NOTLDQUERY: return "no-tld-query"; 702 #endif 703 #ifdef RES_NO_NIBBLE2 704 case RES_NO_NIBBLE2: return "no-nibble2"; 705 #endif 706 /* XXX nonreentrant */ 707 default: snprintf(p_option_nbuf, sizeof(p_option_nbuf), "?0x%lx?", (u_long)option); 708 return (p_option_nbuf); 709 } 710 } 711 712 /*% 713 * Return a mnemonic for a time to live. 714 */ 715 const char * 716 p_time(u_int32_t value) { 717 718 if (ns_format_ttl((u_long)value, p_time_nbuf, sizeof(p_time_nbuf)) < 0) 719 snprintf(p_time_nbuf, sizeof(p_time_nbuf), "%u", value); 720 return (p_time_nbuf); 721 } 722 723 /*% 724 * Return a string for the rcode. 725 */ 726 const char * 727 p_rcode(int rcode) { 728 return (sym_ntos(__p_rcode_syms, rcode, (int *)0)); 729 } 730 731 /*% 732 * Return a string for a res_sockaddr_union. 733 */ 734 const char * 735 p_sockun(union res_sockaddr_union u, char *buf, size_t size) { 736 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"]; 737 738 switch (u.sin.sin_family) { 739 case AF_INET: 740 if (inet_ntop(AF_INET, &u.sin.sin_addr, ret, 741 (socklen_t)sizeof ret) == NULL) 742 goto out; 743 break; 744 #ifdef HAS_INET6_STRUCTS 745 case AF_INET6: 746 if (inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, 747 (socklen_t)sizeof ret) == NULL) 748 goto out; 749 break; 750 #endif 751 default: 752 out: 753 snprintf(ret, sizeof(ret), "[af%d]", u.sin.sin_family); 754 break; 755 } 756 if (size > 0U) { 757 strncpy(buf, ret, size - 1); 758 buf[size - 1] = '0'; 759 } 760 return (buf); 761 } 762 763 /*% 764 * routines to convert between on-the-wire RR format and zone file format. 765 * Does not contain conversion to/from decimal degrees; divide or multiply 766 * by 60*60*1000 for that. 767 */ 768 769 static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000, 770 1000000,10000000,100000000,1000000000}; 771 772 /*% takes an XeY precision/size value, returns a string representation. */ 773 static const char * 774 precsize_ntoa(u_int32_t prec) 775 { 776 unsigned long val; 777 int mantissa, exponent; 778 779 mantissa = (int)((prec >> 4) & 0x0f) % 10; 780 exponent = (int)((prec >> 0) & 0x0f) % 10; 781 782 val = mantissa * poweroften[exponent]; 783 784 (void) snprintf(precsize_ntoa_retbuf, sizeof(precsize_ntoa_retbuf), "%lu.%.2lu", val/100, val%100); 785 return precsize_ntoa_retbuf; 786 } 787 788 /*% converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */ 789 static u_int8_t 790 precsize_aton(const char **strptr) { 791 unsigned int mval = 0, cmval = 0; 792 u_int8_t retval = 0; 793 const char *cp; 794 int exponent; 795 int mantissa; 796 797 cp = *strptr; 798 799 while (isdigit((unsigned char)*cp)) 800 mval = mval * 10 + (*cp++ - '0'); 801 802 if (*cp == '.') { /*%< centimeters */ 803 cp++; 804 if (isdigit((unsigned char)*cp)) { 805 cmval = (*cp++ - '0') * 10; 806 if (isdigit((unsigned char)*cp)) { 807 cmval += (*cp++ - '0'); 808 } 809 } 810 } 811 cmval = (mval * 100) + cmval; 812 813 for (exponent = 0; exponent < 9; exponent++) 814 if (cmval < poweroften[exponent+1]) 815 break; 816 817 mantissa = cmval / poweroften[exponent]; 818 if (mantissa > 9) 819 mantissa = 9; 820 821 retval = (mantissa << 4) | exponent; 822 823 *strptr = cp; 824 825 return (retval); 826 } 827 828 /*% converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */ 829 static u_int32_t 830 latlon2ul(const char **latlonstrptr, int *which) { 831 const char *cp; 832 u_int32_t retval; 833 int deg = 0, min = 0, secs = 0, secsfrac = 0; 834 835 cp = *latlonstrptr; 836 837 while (isdigit((unsigned char)*cp)) 838 deg = deg * 10 + (*cp++ - '0'); 839 840 while (isspace((unsigned char)*cp)) 841 cp++; 842 843 if (!(isdigit((unsigned char)*cp))) 844 goto fndhemi; 845 846 while (isdigit((unsigned char)*cp)) 847 min = min * 10 + (*cp++ - '0'); 848 849 while (isspace((unsigned char)*cp)) 850 cp++; 851 852 if (!(isdigit((unsigned char)*cp))) 853 goto fndhemi; 854 855 while (isdigit((unsigned char)*cp)) 856 secs = secs * 10 + (*cp++ - '0'); 857 858 if (*cp == '.') { /*%< decimal seconds */ 859 cp++; 860 if (isdigit((unsigned char)*cp)) { 861 secsfrac = (*cp++ - '0') * 100; 862 if (isdigit((unsigned char)*cp)) { 863 secsfrac += (*cp++ - '0') * 10; 864 if (isdigit((unsigned char)*cp)) { 865 secsfrac += (*cp++ - '0'); 866 } 867 } 868 } 869 } 870 871 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 872 cp++; 873 874 while (isspace((unsigned char)*cp)) 875 cp++; 876 877 fndhemi: 878 switch (*cp) { 879 case 'N': case 'n': 880 case 'E': case 'e': 881 retval = ((unsigned)1<<31) 882 + (((((deg * 60) + min) * 60) + secs) * 1000) 883 + secsfrac; 884 break; 885 case 'S': case 's': 886 case 'W': case 'w': 887 retval = ((unsigned)1<<31) 888 - (((((deg * 60) + min) * 60) + secs) * 1000) 889 - secsfrac; 890 break; 891 default: 892 retval = 0; /*%< invalid value -- indicates error */ 893 break; 894 } 895 896 switch (*cp) { 897 case 'N': case 'n': 898 case 'S': case 's': 899 *which = 1; /*%< latitude */ 900 break; 901 case 'E': case 'e': 902 case 'W': case 'w': 903 *which = 2; /*%< longitude */ 904 break; 905 default: 906 *which = 0; /*%< error */ 907 break; 908 } 909 910 cp++; /*%< skip the hemisphere */ 911 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 912 cp++; 913 914 while (isspace((unsigned char)*cp)) /*%< move to next field */ 915 cp++; 916 917 *latlonstrptr = cp; 918 919 return (retval); 920 } 921 922 /*% 923 * converts a zone file representation in a string to an RDATA on-the-wire 924 * representation. */ 925 int 926 loc_aton(const char *ascii, u_char *binary) 927 { 928 const char *cp, *maxcp; 929 u_char *bcp; 930 931 u_int32_t latit = 0, longit = 0, alt = 0; 932 u_int32_t lltemp1 = 0, lltemp2 = 0; 933 int altmeters = 0, altfrac = 0, altsign = 1; 934 u_int8_t hp = 0x16; /*%< default = 1e6 cm = 10000.00m = 10km */ 935 u_int8_t vp = 0x13; /*%< default = 1e3 cm = 10.00m */ 936 u_int8_t siz = 0x12; /*%< default = 1e2 cm = 1.00m */ 937 int which1 = 0, which2 = 0; 938 939 cp = ascii; 940 maxcp = cp + strlen(ascii); 941 942 lltemp1 = latlon2ul(&cp, &which1); 943 944 lltemp2 = latlon2ul(&cp, &which2); 945 946 switch (which1 + which2) { 947 case 3: /*%< 1 + 2, the only valid combination */ 948 if ((which1 == 1) && (which2 == 2)) { /*%< normal case */ 949 latit = lltemp1; 950 longit = lltemp2; 951 } else if ((which1 == 2) && (which2 == 1)) { /*%< reversed */ 952 longit = lltemp1; 953 latit = lltemp2; 954 } else { /*%< some kind of brokenness */ 955 return (0); 956 } 957 break; 958 default: /*%< we didn't get one of each */ 959 return (0); 960 } 961 962 /* altitude */ 963 if (*cp == '-') { 964 altsign = -1; 965 cp++; 966 } 967 968 if (*cp == '+') 969 cp++; 970 971 while (isdigit((unsigned char)*cp)) 972 altmeters = altmeters * 10 + (*cp++ - '0'); 973 974 if (*cp == '.') { /*%< decimal meters */ 975 cp++; 976 if (isdigit((unsigned char)*cp)) { 977 altfrac = (*cp++ - '0') * 10; 978 if (isdigit((unsigned char)*cp)) { 979 altfrac += (*cp++ - '0'); 980 } 981 } 982 } 983 984 alt = (10000000 + (altsign * (altmeters * 100 + altfrac))); 985 986 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 987 cp++; 988 989 while (isspace((unsigned char)*cp) && (cp < maxcp)) 990 cp++; 991 992 if (cp >= maxcp) 993 goto defaults; 994 995 siz = precsize_aton(&cp); 996 997 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 998 cp++; 999 1000 while (isspace((unsigned char)*cp) && (cp < maxcp)) 1001 cp++; 1002 1003 if (cp >= maxcp) 1004 goto defaults; 1005 1006 hp = precsize_aton(&cp); 1007 1008 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 1009 cp++; 1010 1011 while (isspace((unsigned char)*cp) && (cp < maxcp)) 1012 cp++; 1013 1014 if (cp >= maxcp) 1015 goto defaults; 1016 1017 vp = precsize_aton(&cp); 1018 1019 defaults: 1020 1021 bcp = binary; 1022 *bcp++ = (u_int8_t) 0; /*%< version byte */ 1023 *bcp++ = siz; 1024 *bcp++ = hp; 1025 *bcp++ = vp; 1026 PUTLONG(latit,bcp); 1027 PUTLONG(longit,bcp); 1028 PUTLONG(alt,bcp); 1029 1030 return (16); /*%< size of RR in octets */ 1031 } 1032 1033 const char * 1034 loc_ntoa(const u_char *binary, char *ascii) 1035 { 1036 return loc_ntoa1(binary, ascii, 255); /* XXX: broken */ 1037 } 1038 1039 /*% takes an on-the-wire LOC RR and formats it in a human readable format. */ 1040 const char * 1041 loc_ntoa1(const u_char *binary, char *ascii, size_t len) 1042 { 1043 static const char *error = "?"; 1044 static char tmpbuf[sizeof 1045 "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"]; 1046 const u_char *cp = binary; 1047 1048 int latdeg, latmin, latsec, latsecfrac; 1049 int longdeg, longmin, longsec, longsecfrac; 1050 char northsouth, eastwest; 1051 const char *altsign; 1052 int altmeters, altfrac; 1053 1054 const u_int32_t referencealt = 100000 * 100; 1055 1056 int32_t latval, longval, altval; 1057 u_int32_t templ; 1058 u_int8_t sizeval, hpval, vpval, versionval; 1059 1060 char *sizestr, *hpstr, *vpstr; 1061 1062 versionval = *cp++; 1063 1064 if (ascii == NULL) { 1065 ascii = tmpbuf; 1066 len = sizeof(tmpbuf); 1067 } 1068 1069 if (versionval) { 1070 (void) snprintf(ascii, len, "; error: unknown LOC RR version"); 1071 return (ascii); 1072 } 1073 1074 sizeval = *cp++; 1075 1076 hpval = *cp++; 1077 vpval = *cp++; 1078 1079 GETLONG(templ, cp); 1080 latval = (templ - ((unsigned)1<<31)); 1081 1082 GETLONG(templ, cp); 1083 longval = (templ - ((unsigned)1<<31)); 1084 1085 GETLONG(templ, cp); 1086 if (templ < referencealt) { /*%< below WGS 84 spheroid */ 1087 altval = referencealt - templ; 1088 altsign = "-"; 1089 } else { 1090 altval = templ - referencealt; 1091 altsign = ""; 1092 } 1093 1094 if (latval < 0) { 1095 northsouth = 'S'; 1096 latval = -latval; 1097 } else 1098 northsouth = 'N'; 1099 1100 latsecfrac = latval % 1000; 1101 latval = latval / 1000; 1102 latsec = latval % 60; 1103 latval = latval / 60; 1104 latmin = latval % 60; 1105 latval = latval / 60; 1106 latdeg = latval; 1107 1108 if (longval < 0) { 1109 eastwest = 'W'; 1110 longval = -longval; 1111 } else 1112 eastwest = 'E'; 1113 1114 longsecfrac = longval % 1000; 1115 longval = longval / 1000; 1116 longsec = longval % 60; 1117 longval = longval / 60; 1118 longmin = longval % 60; 1119 longval = longval / 60; 1120 longdeg = longval; 1121 1122 altfrac = altval % 100; 1123 altmeters = (altval / 100); 1124 1125 sizestr = strdup(precsize_ntoa((u_int32_t)sizeval)); 1126 hpstr = strdup(precsize_ntoa((u_int32_t)hpval)); 1127 vpstr = strdup(precsize_ntoa((u_int32_t)vpval)); 1128 1129 snprintf(ascii, len, 1130 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm", 1131 latdeg, latmin, latsec, latsecfrac, northsouth, 1132 longdeg, longmin, longsec, longsecfrac, eastwest, 1133 altsign, altmeters, altfrac, 1134 (sizestr != NULL) ? sizestr : error, 1135 (hpstr != NULL) ? hpstr : error, 1136 (vpstr != NULL) ? vpstr : error); 1137 1138 if (sizestr != NULL) 1139 free(sizestr); 1140 if (hpstr != NULL) 1141 free(hpstr); 1142 if (vpstr != NULL) 1143 free(vpstr); 1144 1145 return (ascii); 1146 } 1147 1148 1149 /*% Return the number of DNS hierarchy levels in the name. */ 1150 int 1151 dn_count_labels(const char *name) { 1152 size_t len, i, count; 1153 1154 len = strlen(name); 1155 for (i = 0, count = 0; i < len; i++) { 1156 /* XXX need to check for \. or use named's nlabels(). */ 1157 if (name[i] == '.') 1158 count++; 1159 } 1160 1161 /* don't count initial wildcard */ 1162 if (name[0] == '*') 1163 if (count) 1164 count--; 1165 1166 /* don't count the null label for root. */ 1167 /* if terminating '.' not found, must adjust */ 1168 /* count to include last label */ 1169 if (len > 0 && name[len-1] != '.') 1170 count++; 1171 _DIAGASSERT(__type_fit(int, count)); 1172 return (int)count; 1173 } 1174 1175 /*% 1176 * Make dates expressed in seconds-since-Jan-1-1970 easy to read. 1177 * SIG records are required to be printed like this, by the Secure DNS RFC. 1178 */ 1179 char * 1180 p_secstodate (u_long secs) { 1181 /* XXX nonreentrant */ 1182 char *output = p_secstodate_output; 1183 time_t myclock = secs; 1184 struct tm *mytime; 1185 #ifdef HAVE_TIME_R 1186 struct tm res; 1187 1188 mytime = gmtime_r(&myclock, &res); 1189 #else 1190 mytime = gmtime(&myclock); 1191 #endif 1192 mytime->tm_year += 1900; 1193 mytime->tm_mon += 1; 1194 if ((size_t)snprintf(output, sizeof p_secstodate_output, 1195 "%04d%02d%02d%02d%02d%02d", 1196 mytime->tm_year, mytime->tm_mon, mytime->tm_mday, 1197 mytime->tm_hour, mytime->tm_min, mytime->tm_sec) > 1198 sizeof p_secstodate_output) { 1199 output[sizeof(p_secstodate_output) - 1] = 0; 1200 } 1201 return (output); 1202 } 1203 1204 u_int16_t 1205 res_nametoclass(const char *buf, int *successp) { 1206 unsigned long result; 1207 char *endptr; 1208 int success; 1209 1210 result = sym_ston(__p_class_syms, buf, &success); 1211 if (success) 1212 goto done; 1213 1214 if (strncasecmp(buf, "CLASS", 5) != 0 || 1215 !isdigit((unsigned char)buf[5])) 1216 goto done; 1217 errno = 0; 1218 result = strtoul(buf + 5, &endptr, 10); 1219 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1220 success = 1; 1221 done: 1222 if (successp) 1223 *successp = success; 1224 return (u_int16_t)(result); 1225 } 1226 1227 u_int16_t 1228 res_nametotype(const char *buf, int *successp) { 1229 unsigned long result; 1230 char *endptr; 1231 int success; 1232 1233 result = sym_ston(__p_type_syms, buf, &success); 1234 if (success) 1235 goto done; 1236 1237 if (strncasecmp(buf, "type", 4) != 0 || 1238 !isdigit((unsigned char)buf[4])) 1239 goto done; 1240 errno = 0; 1241 result = strtoul(buf + 4, &endptr, 10); 1242 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1243 success = 1; 1244 done: 1245 if (successp) 1246 *successp = success; 1247 return (u_int16_t)(result); 1248 } 1249 1250 /*! \file */ 1251
Indexes created Sun Oct 25 00:26:45 UTC 2026