res_debug.c revision 1.10.14.1
1 /* $NetBSD: res_debug.c,v 1.10.14.1 2011/01/09 20:43:29 riz 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. All advertising materials mentioning features or use of this software 33 * must display the following acknowledgement: 34 * This product includes software developed by the University of 35 * California, Berkeley and its contributors. 36 * 4. Neither the name of the University nor the names of its contributors 37 * may be used to endorse or promote products derived from this software 38 * without specific prior written permission. 39 * 40 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 */ 52 53 /* 54 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 55 * 56 * Permission to use, copy, modify, and distribute this software for any 57 * purpose with or without fee is hereby granted, provided that the above 58 * copyright notice and this permission notice appear in all copies, and that 59 * the name of Digital Equipment Corporation not be used in advertising or 60 * publicity pertaining to distribution of the document or software without 61 * specific, written prior permission. 62 * 63 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 64 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 65 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 66 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 67 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 68 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 69 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 70 * SOFTWARE. 71 */ 72 73 /* 74 * Portions Copyright (c) 1995 by International Business Machines, Inc. 75 * 76 * International Business Machines, Inc. (hereinafter called IBM) grants 77 * permission under its copyrights to use, copy, modify, and distribute this 78 * Software with or without fee, provided that the above copyright notice and 79 * all paragraphs of this notice appear in all copies, and that the name of IBM 80 * not be used in connection with the marketing of any product incorporating 81 * the Software or modifications thereof, without specific, written prior 82 * permission. 83 * 84 * To the extent it has a right to do so, IBM grants an immunity from suit 85 * under its patents, if any, for the use, sale or manufacture of products to 86 * the extent that such products are used for performing Domain Name System 87 * dynamic updates in TCP/IP networks by means of the Software. No immunity is 88 * granted for any product per se or for any other function of any product. 89 * 90 * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES, 91 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 92 * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL, 93 * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING 94 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN 95 * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES. 96 */ 97 98 #include <sys/cdefs.h> 99 #if defined(LIBC_SCCS) && !defined(lint) 100 #ifdef notdef 101 static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93"; 102 static const char rcsid[] = "Id: res_debug.c,v 1.19 2009/02/26 11:20:20 tbox Exp"; 103 #else 104 __RCSID("$NetBSD: res_debug.c,v 1.10.14.1 2011/01/09 20:43:29 riz Exp $"); 105 #endif 106 #endif /* LIBC_SCCS and not lint */ 107 108 #include "port_before.h" 109 110 #include "namespace.h" 111 #include <sys/types.h> 112 #include <sys/param.h> 113 #include <sys/socket.h> 114 115 #include <netinet/in.h> 116 #include <arpa/inet.h> 117 #include <arpa/nameser.h> 118 119 #include <ctype.h> 120 #include <errno.h> 121 #include <math.h> 122 #include <netdb.h> 123 #include <resolv.h> 124 #include <resolv_mt.h> 125 #include <stdio.h> 126 #include <stdlib.h> 127 #include <string.h> 128 #include <time.h> 129 130 #include "port_after.h" 131 132 #ifdef SPRINTF_CHAR 133 # define SPRINTF(x) strlen(sprintf/**/x) 134 #else 135 # define SPRINTF(x) sprintf x 136 #endif 137 138 extern const char *_res_opcodes[]; 139 extern const char *_res_sectioncodes[]; 140 141 #if 0 142 #ifdef __weak_alias 143 __weak_alias(res_pquery,__res_pquery) 144 __weak_alias(res_nametoclass,__res_nametoclass) 145 __weak_alias(res_nametotype,__res_nametotype) 146 #endif 147 #endif 148 149 #ifndef _LIBC 150 /*% 151 * Print the current options. 152 */ 153 void 154 fp_resstat(const res_state statp, FILE *file) { 155 u_long mask; 156 157 fprintf(file, ";; res options:"); 158 for (mask = 1; mask != 0U; mask <<= 1) 159 if (statp->options & mask) 160 fprintf(file, " %s", p_option(mask)); 161 putc('\n', file); 162 } 163 #endif 164 165 static void 166 do_section(const res_state statp, 167 ns_msg *handle, ns_sect section, 168 int pflag, FILE *file) 169 { 170 int n, sflag, rrnum; 171 static int buflen = 2048; 172 char *buf; 173 ns_opcode opcode; 174 ns_rr rr; 175 176 /* 177 * Print answer records. 178 */ 179 sflag = (statp->pfcode & pflag); 180 if (statp->pfcode && !sflag) 181 return; 182 183 buf = malloc((size_t)buflen); 184 if (buf == NULL) { 185 fprintf(file, ";; memory allocation failure\n"); 186 return; 187 } 188 189 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode); 190 rrnum = 0; 191 for (;;) { 192 if (ns_parserr(handle, section, rrnum, &rr)) { 193 if (errno != ENODEV) 194 fprintf(file, ";; ns_parserr: %s\n", 195 strerror(errno)); 196 else if (rrnum > 0 && sflag != 0 && 197 (statp->pfcode & RES_PRF_HEAD1)) 198 putc('\n', file); 199 goto cleanup; 200 } 201 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1)) 202 fprintf(file, ";; %s SECTION:\n", 203 p_section(section, opcode)); 204 if (section == ns_s_qd) 205 fprintf(file, ";;\t%s, type = %s, class = %s\n", 206 ns_rr_name(rr), 207 p_type(ns_rr_type(rr)), 208 p_class(ns_rr_class(rr))); 209 else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) { 210 u_int16_t optcode, optlen, rdatalen = ns_rr_rdlen(rr); 211 u_int32_t ttl = ns_rr_ttl(rr); 212 213 fprintf(file, 214 "; EDNS: version: %u, udp=%u, flags=%04x\n", 215 (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff); 216 217 while (rdatalen >= 4) { 218 const u_char *cp = ns_rr_rdata(rr); 219 int i; 220 221 GETSHORT(optcode, cp); 222 GETSHORT(optlen, cp); 223 224 if (optcode == NS_OPT_NSID) { 225 fputs("; NSID: ", file); 226 if (optlen == 0) { 227 fputs("; NSID\n", file); 228 } else { 229 fputs("; NSID: ", file); 230 for (i = 0; i < optlen; i++) 231 fprintf(file, "%02x ", 232 cp[i]); 233 fputs(" (",file); 234 for (i = 0; i < optlen; i++) 235 fprintf(file, "%c", 236 isprint(cp[i])? 237 cp[i] : '.'); 238 fputs(")\n", file); 239 } 240 } else { 241 if (optlen == 0) { 242 fprintf(file, "; OPT=%u\n", 243 optcode); 244 } else { 245 fprintf(file, "; OPT=%u: ", 246 optcode); 247 for (i = 0; i < optlen; i++) 248 fprintf(file, "%02x ", 249 cp[i]); 250 fputs(" (",file); 251 for (i = 0; i < optlen; i++) 252 fprintf(file, "%c", 253 isprint(cp[i]) ? 254 cp[i] : '.'); 255 fputs(")\n", file); 256 } 257 } 258 rdatalen -= 4 + optlen; 259 } 260 } else { 261 n = ns_sprintrr(handle, &rr, NULL, NULL, 262 buf, (u_int)buflen); 263 if (n < 0) { 264 if (errno == ENOSPC) { 265 free(buf); 266 buf = NULL; 267 if (buflen < 131072) 268 buf = malloc((size_t)(buflen += 1024)); 269 if (buf == NULL) { 270 fprintf(file, 271 ";; memory allocation failure\n"); 272 return; 273 } 274 continue; 275 } 276 fprintf(file, ";; ns_sprintrr: %s\n", 277 strerror(errno)); 278 goto cleanup; 279 } 280 fputs(buf, file); 281 fputc('\n', file); 282 } 283 rrnum++; 284 } 285 cleanup: 286 if (buf != NULL) 287 free(buf); 288 } 289 290 /*% 291 * Print the contents of a query. 292 * This is intended to be primarily a debugging routine. 293 */ 294 void 295 res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) { 296 ns_msg handle; 297 int qdcount, ancount, nscount, arcount; 298 u_int opcode, rcode, id; 299 300 if (ns_initparse(msg, len, &handle) < 0) { 301 fprintf(file, ";; ns_initparse: %s\n", strerror(errno)); 302 return; 303 } 304 opcode = ns_msg_getflag(handle, ns_f_opcode); 305 rcode = ns_msg_getflag(handle, ns_f_rcode); 306 id = ns_msg_id(handle); 307 qdcount = ns_msg_count(handle, ns_s_qd); 308 ancount = ns_msg_count(handle, ns_s_an); 309 nscount = ns_msg_count(handle, ns_s_ns); 310 arcount = ns_msg_count(handle, ns_s_ar); 311 312 /* 313 * Print header fields. 314 */ 315 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode) 316 fprintf(file, 317 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n", 318 _res_opcodes[opcode], p_rcode((int)rcode), id); 319 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX)) 320 putc(';', file); 321 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) { 322 fprintf(file, "; flags:"); 323 if (ns_msg_getflag(handle, ns_f_qr)) 324 fprintf(file, " qr"); 325 if (ns_msg_getflag(handle, ns_f_aa)) 326 fprintf(file, " aa"); 327 if (ns_msg_getflag(handle, ns_f_tc)) 328 fprintf(file, " tc"); 329 if (ns_msg_getflag(handle, ns_f_rd)) 330 fprintf(file, " rd"); 331 if (ns_msg_getflag(handle, ns_f_ra)) 332 fprintf(file, " ra"); 333 if (ns_msg_getflag(handle, ns_f_z)) 334 fprintf(file, " ??"); 335 if (ns_msg_getflag(handle, ns_f_ad)) 336 fprintf(file, " ad"); 337 if (ns_msg_getflag(handle, ns_f_cd)) 338 fprintf(file, " cd"); 339 } 340 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) { 341 fprintf(file, "; %s: %d", 342 p_section(ns_s_qd, (int)opcode), qdcount); 343 fprintf(file, ", %s: %d", 344 p_section(ns_s_an, (int)opcode), ancount); 345 fprintf(file, ", %s: %d", 346 p_section(ns_s_ns, (int)opcode), nscount); 347 fprintf(file, ", %s: %d", 348 p_section(ns_s_ar, (int)opcode), arcount); 349 } 350 if ((!statp->pfcode) || (statp->pfcode & 351 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) { 352 putc('\n',file); 353 } 354 /* 355 * Print the various sections. 356 */ 357 do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file); 358 do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file); 359 do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file); 360 do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file); 361 if (qdcount == 0 && ancount == 0 && 362 nscount == 0 && arcount == 0) 363 putc('\n', file); 364 } 365 366 const u_char * 367 p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) { 368 char name[MAXDNAME]; 369 int n; 370 371 if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0) 372 return (NULL); 373 if (name[0] == '\0') 374 putc('.', file); 375 else 376 fputs(name, file); 377 return (cp + n); 378 } 379 380 const u_char * 381 p_cdname(const u_char *cp, const u_char *msg, FILE *file) { 382 return (p_cdnname(cp, msg, PACKETSZ, file)); 383 } 384 385 /*% 386 * Return a fully-qualified domain name from a compressed name (with 387 length supplied). */ 388 389 const u_char * 390 p_fqnname(cp, msg, msglen, name, namelen) 391 const u_char *cp, *msg; 392 int msglen; 393 char *name; 394 int namelen; 395 { 396 int n, newlen; 397 398 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0) 399 return (NULL); 400 newlen = strlen(name); 401 if (newlen == 0 || name[newlen - 1] != '.') { 402 if (newlen + 1 >= namelen) /*%< Lack space for final dot */ 403 return (NULL); 404 else 405 strcpy(name + newlen, "."); 406 } 407 return (cp + n); 408 } 409 410 /* XXX: the rest of these functions need to become length-limited, too. */ 411 412 const u_char * 413 p_fqname(const u_char *cp, const u_char *msg, FILE *file) { 414 char name[MAXDNAME]; 415 const u_char *n; 416 417 n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name); 418 if (n == NULL) 419 return (NULL); 420 fputs(name, file); 421 return (n); 422 } 423 424 /*% 425 * Names of RR classes and qclasses. Classes and qclasses are the same, except 426 * that C_ANY is a qclass but not a class. (You can ask for records of class 427 * C_ANY, but you can't have any records of that class in the database.) 428 */ 429 const struct res_sym __p_class_syms[] = { 430 {C_IN, "IN", (char *)0}, 431 {C_CHAOS, "CH", (char *)0}, 432 {C_CHAOS, "CHAOS", (char *)0}, 433 {C_HS, "HS", (char *)0}, 434 {C_HS, "HESIOD", (char *)0}, 435 {C_ANY, "ANY", (char *)0}, 436 {C_NONE, "NONE", (char *)0}, 437 {C_IN, (char *)0, (char *)0} 438 }; 439 440 /*% 441 * Names of message sections. 442 */ 443 const struct res_sym __p_default_section_syms[] = { 444 {ns_s_qd, "QUERY", (char *)0}, 445 {ns_s_an, "ANSWER", (char *)0}, 446 {ns_s_ns, "AUTHORITY", (char *)0}, 447 {ns_s_ar, "ADDITIONAL", (char *)0}, 448 {0, (char *)0, (char *)0} 449 }; 450 451 const struct res_sym __p_update_section_syms[] = { 452 {S_ZONE, "ZONE", (char *)0}, 453 {S_PREREQ, "PREREQUISITE", (char *)0}, 454 {S_UPDATE, "UPDATE", (char *)0}, 455 {S_ADDT, "ADDITIONAL", (char *)0}, 456 {0, (char *)0, (char *)0} 457 }; 458 459 const struct res_sym __p_key_syms[] = { 460 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"}, 461 {NS_ALG_DH, "DH", "Diffie Hellman"}, 462 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"}, 463 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"}, 464 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"}, 465 {0, NULL, NULL} 466 }; 467 468 const struct res_sym __p_cert_syms[] = { 469 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"}, 470 {cert_t_spki, "SPKI", "SPKI certificate"}, 471 {cert_t_pgp, "PGP", "PGP certificate"}, 472 {cert_t_url, "URL", "URL Private"}, 473 {cert_t_oid, "OID", "OID Private"}, 474 {0, NULL, NULL} 475 }; 476 477 /*% 478 * Names of RR types and qtypes. Types and qtypes are the same, except 479 * that T_ANY is a qtype but not a type. (You can ask for records of type 480 * T_ANY, but you can't have any records of that type in the database.) 481 */ 482 const struct res_sym __p_type_syms[] = { 483 {ns_t_a, "A", "address"}, 484 {ns_t_ns, "NS", "name server"}, 485 {ns_t_md, "MD", "mail destination (deprecated)"}, 486 {ns_t_mf, "MF", "mail forwarder (deprecated)"}, 487 {ns_t_cname, "CNAME", "canonical name"}, 488 {ns_t_soa, "SOA", "start of authority"}, 489 {ns_t_mb, "MB", "mailbox"}, 490 {ns_t_mg, "MG", "mail group member"}, 491 {ns_t_mr, "MR", "mail rename"}, 492 {ns_t_null, "NULL", "null"}, 493 {ns_t_wks, "WKS", "well-known service (deprecated)"}, 494 {ns_t_ptr, "PTR", "domain name pointer"}, 495 {ns_t_hinfo, "HINFO", "host information"}, 496 {ns_t_minfo, "MINFO", "mailbox information"}, 497 {ns_t_mx, "MX", "mail exchanger"}, 498 {ns_t_txt, "TXT", "text"}, 499 {ns_t_rp, "RP", "responsible person"}, 500 {ns_t_afsdb, "AFSDB", "DCE or AFS server"}, 501 {ns_t_x25, "X25", "X25 address"}, 502 {ns_t_isdn, "ISDN", "ISDN address"}, 503 {ns_t_rt, "RT", "router"}, 504 {ns_t_nsap, "NSAP", "nsap address"}, 505 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"}, 506 {ns_t_sig, "SIG", "signature"}, 507 {ns_t_key, "KEY", "key"}, 508 {ns_t_px, "PX", "mapping information"}, 509 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"}, 510 {ns_t_aaaa, "AAAA", "IPv6 address"}, 511 {ns_t_loc, "LOC", "location"}, 512 {ns_t_nxt, "NXT", "next valid name (unimplemented)"}, 513 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"}, 514 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"}, 515 {ns_t_srv, "SRV", "server selection"}, 516 {ns_t_atma, "ATMA", "ATM address (unimplemented)"}, 517 {ns_t_naptr, "NAPTR", "naptr"}, 518 {ns_t_kx, "KX", "key exchange"}, 519 {ns_t_cert, "CERT", "certificate"}, 520 {ns_t_a6, "A", "IPv6 address (experminental)"}, 521 {ns_t_dname, "DNAME", "non-terminal redirection"}, 522 {ns_t_opt, "OPT", "opt"}, 523 {ns_t_apl, "apl", "apl"}, 524 {ns_t_ds, "DS", "delegation signer"}, 525 {ns_t_sshfp, "SSFP", "SSH fingerprint"}, 526 {ns_t_ipseckey, "IPSECKEY", "IPSEC key"}, 527 {ns_t_rrsig, "RRSIG", "rrsig"}, 528 {ns_t_nsec, "NSEC", "nsec"}, 529 {ns_t_dnskey, "DNSKEY", "DNS key"}, 530 {ns_t_dhcid, "DHCID", "dynamic host configuration identifier"}, 531 {ns_t_nsec3, "NSEC3", "nsec3"}, 532 {ns_t_nsec3param, "NSEC3PARAM", "NSEC3 parameters"}, 533 {ns_t_hip, "HIP", "host identity protocol"}, 534 {ns_t_spf, "SPF", "sender policy framework"}, 535 {ns_t_tkey, "TKEY", "tkey"}, 536 {ns_t_tsig, "TSIG", "transaction signature"}, 537 {ns_t_ixfr, "IXFR", "incremental zone transfer"}, 538 {ns_t_axfr, "AXFR", "zone transfer"}, 539 {ns_t_zxfr, "ZXFR", "compressed zone transfer"}, 540 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"}, 541 {ns_t_maila, "MAILA", "mail agent (deprecated)"}, 542 {ns_t_naptr, "NAPTR", "URN Naming Authority"}, 543 {ns_t_kx, "KX", "Key Exchange"}, 544 {ns_t_cert, "CERT", "Certificate"}, 545 {ns_t_a6, "A6", "IPv6 Address"}, 546 {ns_t_dname, "DNAME", "dname"}, 547 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"}, 548 {ns_t_opt, "OPT", "EDNS Options"}, 549 {ns_t_any, "ANY", "\"any\""}, 550 {ns_t_dlv, "DLV", "DNSSEC look-aside validation"}, 551 {0, NULL, NULL} 552 }; 553 554 /*% 555 * Names of DNS rcodes. 556 */ 557 const struct res_sym __p_rcode_syms[] = { 558 {ns_r_noerror, "NOERROR", "no error"}, 559 {ns_r_formerr, "FORMERR", "format error"}, 560 {ns_r_servfail, "SERVFAIL", "server failed"}, 561 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"}, 562 {ns_r_notimpl, "NOTIMP", "not implemented"}, 563 {ns_r_refused, "REFUSED", "refused"}, 564 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"}, 565 {ns_r_yxrrset, "YXRRSET", "rrset exists"}, 566 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"}, 567 {ns_r_notauth, "NOTAUTH", "not authoritative"}, 568 {ns_r_notzone, "NOTZONE", "Not in zone"}, 569 {ns_r_max, "", ""}, 570 {ns_r_badsig, "BADSIG", "bad signature"}, 571 {ns_r_badkey, "BADKEY", "bad key"}, 572 {ns_r_badtime, "BADTIME", "bad time"}, 573 {0, NULL, NULL} 574 }; 575 576 int 577 sym_ston(const struct res_sym *syms, const char *name, int *success) { 578 for (; syms->name != 0; syms++) { 579 if (strcasecmp (name, syms->name) == 0) { 580 if (success) 581 *success = 1; 582 return (syms->number); 583 } 584 } 585 if (success) 586 *success = 0; 587 return (syms->number); /*%< The default value. */ 588 } 589 590 const char * 591 sym_ntos(const struct res_sym *syms, int number, int *success) { 592 char *unname = sym_ntos_unname; 593 594 for (; syms->name != 0; syms++) { 595 if (number == syms->number) { 596 if (success) 597 *success = 1; 598 return (syms->name); 599 } 600 } 601 602 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 603 if (success) 604 *success = 0; 605 return (unname); 606 } 607 608 const char * 609 sym_ntop(const struct res_sym *syms, int number, int *success) { 610 char *unname = sym_ntop_unname; 611 612 for (; syms->name != 0; syms++) { 613 if (number == syms->number) { 614 if (success) 615 *success = 1; 616 return (syms->humanname); 617 } 618 } 619 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 620 if (success) 621 *success = 0; 622 return (unname); 623 } 624 625 /*% 626 * Return a string for the type. 627 */ 628 const char * 629 p_type(int type) { 630 int success; 631 const char *result; 632 static char typebuf[20]; 633 634 result = sym_ntos(__p_type_syms, type, &success); 635 if (success) 636 return (result); 637 if (type < 0 || type > 0xffff) 638 return ("BADTYPE"); 639 sprintf(typebuf, "TYPE%d", type); 640 return (typebuf); 641 } 642 643 /*% 644 * Return a string for the type. 645 */ 646 const char * 647 p_section(int section, int opcode) { 648 const struct res_sym *symbols; 649 650 switch (opcode) { 651 case ns_o_update: 652 symbols = __p_update_section_syms; 653 break; 654 default: 655 symbols = __p_default_section_syms; 656 break; 657 } 658 return (sym_ntos(symbols, section, (int *)0)); 659 } 660 661 /*% 662 * Return a mnemonic for class. 663 */ 664 const char * 665 p_class(int class) { 666 int success; 667 const char *result; 668 static char classbuf[20]; 669 670 result = sym_ntos(__p_class_syms, class, &success); 671 if (success) 672 return (result); 673 if (class < 0 || class > 0xffff) 674 return ("BADCLASS"); 675 sprintf(classbuf, "CLASS%d", class); 676 return (classbuf); 677 } 678 679 /*% 680 * Return a mnemonic for an option 681 */ 682 const char * 683 p_option(u_long option) { 684 char *nbuf = p_option_nbuf; 685 686 switch (option) { 687 case RES_INIT: return "init"; 688 case RES_DEBUG: return "debug"; 689 case RES_AAONLY: return "aaonly(unimpl)"; 690 case RES_USEVC: return "usevc"; 691 case RES_PRIMARY: return "primry(unimpl)"; 692 case RES_IGNTC: return "igntc"; 693 case RES_RECURSE: return "recurs"; 694 case RES_DEFNAMES: return "defnam"; 695 case RES_STAYOPEN: return "styopn"; 696 case RES_DNSRCH: return "dnsrch"; 697 case RES_INSECURE1: return "insecure1"; 698 case RES_INSECURE2: return "insecure2"; 699 case RES_NOALIASES: return "noaliases"; 700 case RES_USE_INET6: return "inet6"; 701 #ifdef RES_USE_EDNS0 /*%< KAME extension */ 702 case RES_USE_EDNS0: return "edns0"; 703 case RES_NSID: return "nsid"; 704 #endif 705 #ifdef RES_USE_DNAME 706 case RES_USE_DNAME: return "dname"; 707 #endif 708 #ifdef RES_USE_DNSSEC 709 case RES_USE_DNSSEC: return "dnssec"; 710 #endif 711 #ifdef RES_NOTLDQUERY 712 case RES_NOTLDQUERY: return "no-tld-query"; 713 #endif 714 #ifdef RES_NO_NIBBLE2 715 case RES_NO_NIBBLE2: return "no-nibble2"; 716 #endif 717 /* XXX nonreentrant */ 718 default: sprintf(nbuf, "?0x%lx?", (u_long)option); 719 return (nbuf); 720 } 721 } 722 723 /*% 724 * Return a mnemonic for a time to live. 725 */ 726 const char * 727 p_time(u_int32_t value) { 728 char *nbuf = p_time_nbuf; 729 730 if (ns_format_ttl((u_long)value, nbuf, sizeof nbuf) < 0) 731 sprintf(nbuf, "%u", value); 732 return (nbuf); 733 } 734 735 /*% 736 * Return a string for the rcode. 737 */ 738 const char * 739 p_rcode(int rcode) { 740 return (sym_ntos(__p_rcode_syms, rcode, (int *)0)); 741 } 742 743 /*% 744 * Return a string for a res_sockaddr_union. 745 */ 746 const char * 747 p_sockun(union res_sockaddr_union u, char *buf, size_t size) { 748 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"]; 749 750 switch (u.sin.sin_family) { 751 case AF_INET: 752 inet_ntop(AF_INET, &u.sin.sin_addr, ret, sizeof ret); 753 break; 754 #ifdef HAS_INET6_STRUCTS 755 case AF_INET6: 756 inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret); 757 break; 758 #endif 759 default: 760 sprintf(ret, "[af%d]", u.sin.sin_family); 761 break; 762 } 763 if (size > 0U) { 764 strncpy(buf, ret, size - 1); 765 buf[size - 1] = '0'; 766 } 767 return (buf); 768 } 769 770 /*% 771 * routines to convert between on-the-wire RR format and zone file format. 772 * Does not contain conversion to/from decimal degrees; divide or multiply 773 * by 60*60*1000 for that. 774 */ 775 776 static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000, 777 1000000,10000000,100000000,1000000000}; 778 779 /*% takes an XeY precision/size value, returns a string representation. */ 780 static const char * 781 precsize_ntoa(u_int32_t prec) 782 { 783 char *retbuf = precsize_ntoa_retbuf; 784 unsigned long val; 785 int mantissa, exponent; 786 787 mantissa = (int)((prec >> 4) & 0x0f) % 10; 788 exponent = (int)((prec >> 0) & 0x0f) % 10; 789 790 val = mantissa * poweroften[exponent]; 791 792 (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100); 793 return (retbuf); 794 } 795 796 /*% converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */ 797 static u_int8_t 798 precsize_aton(const char **strptr) { 799 unsigned int mval = 0, cmval = 0; 800 u_int8_t retval = 0; 801 const char *cp; 802 int exponent; 803 int mantissa; 804 805 cp = *strptr; 806 807 while (isdigit((unsigned char)*cp)) 808 mval = mval * 10 + (*cp++ - '0'); 809 810 if (*cp == '.') { /*%< centimeters */ 811 cp++; 812 if (isdigit((unsigned char)*cp)) { 813 cmval = (*cp++ - '0') * 10; 814 if (isdigit((unsigned char)*cp)) { 815 cmval += (*cp++ - '0'); 816 } 817 } 818 } 819 cmval = (mval * 100) + cmval; 820 821 for (exponent = 0; exponent < 9; exponent++) 822 if (cmval < poweroften[exponent+1]) 823 break; 824 825 mantissa = cmval / poweroften[exponent]; 826 if (mantissa > 9) 827 mantissa = 9; 828 829 retval = (mantissa << 4) | exponent; 830 831 *strptr = cp; 832 833 return (retval); 834 } 835 836 /*% converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */ 837 static u_int32_t 838 latlon2ul(const char **latlonstrptr, int *which) { 839 const char *cp; 840 u_int32_t retval; 841 int deg = 0, min = 0, secs = 0, secsfrac = 0; 842 843 cp = *latlonstrptr; 844 845 while (isdigit((unsigned char)*cp)) 846 deg = deg * 10 + (*cp++ - '0'); 847 848 while (isspace((unsigned char)*cp)) 849 cp++; 850 851 if (!(isdigit((unsigned char)*cp))) 852 goto fndhemi; 853 854 while (isdigit((unsigned char)*cp)) 855 min = min * 10 + (*cp++ - '0'); 856 857 while (isspace((unsigned char)*cp)) 858 cp++; 859 860 if (!(isdigit((unsigned char)*cp))) 861 goto fndhemi; 862 863 while (isdigit((unsigned char)*cp)) 864 secs = secs * 10 + (*cp++ - '0'); 865 866 if (*cp == '.') { /*%< decimal seconds */ 867 cp++; 868 if (isdigit((unsigned char)*cp)) { 869 secsfrac = (*cp++ - '0') * 100; 870 if (isdigit((unsigned char)*cp)) { 871 secsfrac += (*cp++ - '0') * 10; 872 if (isdigit((unsigned char)*cp)) { 873 secsfrac += (*cp++ - '0'); 874 } 875 } 876 } 877 } 878 879 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 880 cp++; 881 882 while (isspace((unsigned char)*cp)) 883 cp++; 884 885 fndhemi: 886 switch (*cp) { 887 case 'N': case 'n': 888 case 'E': case 'e': 889 retval = ((unsigned)1<<31) 890 + (((((deg * 60) + min) * 60) + secs) * 1000) 891 + secsfrac; 892 break; 893 case 'S': case 's': 894 case 'W': case 'w': 895 retval = ((unsigned)1<<31) 896 - (((((deg * 60) + min) * 60) + secs) * 1000) 897 - secsfrac; 898 break; 899 default: 900 retval = 0; /*%< invalid value -- indicates error */ 901 break; 902 } 903 904 switch (*cp) { 905 case 'N': case 'n': 906 case 'S': case 's': 907 *which = 1; /*%< latitude */ 908 break; 909 case 'E': case 'e': 910 case 'W': case 'w': 911 *which = 2; /*%< longitude */ 912 break; 913 default: 914 *which = 0; /*%< error */ 915 break; 916 } 917 918 cp++; /*%< skip the hemisphere */ 919 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 920 cp++; 921 922 while (isspace((unsigned char)*cp)) /*%< move to next field */ 923 cp++; 924 925 *latlonstrptr = cp; 926 927 return (retval); 928 } 929 930 /*% 931 * converts a zone file representation in a string to an RDATA on-the-wire 932 * representation. */ 933 int 934 loc_aton(ascii, binary) 935 const char *ascii; 936 u_char *binary; 937 { 938 const char *cp, *maxcp; 939 u_char *bcp; 940 941 u_int32_t latit = 0, longit = 0, alt = 0; 942 u_int32_t lltemp1 = 0, lltemp2 = 0; 943 int altmeters = 0, altfrac = 0, altsign = 1; 944 u_int8_t hp = 0x16; /*%< default = 1e6 cm = 10000.00m = 10km */ 945 u_int8_t vp = 0x13; /*%< default = 1e3 cm = 10.00m */ 946 u_int8_t siz = 0x12; /*%< default = 1e2 cm = 1.00m */ 947 int which1 = 0, which2 = 0; 948 949 cp = ascii; 950 maxcp = cp + strlen(ascii); 951 952 lltemp1 = latlon2ul(&cp, &which1); 953 954 lltemp2 = latlon2ul(&cp, &which2); 955 956 switch (which1 + which2) { 957 case 3: /*%< 1 + 2, the only valid combination */ 958 if ((which1 == 1) && (which2 == 2)) { /*%< normal case */ 959 latit = lltemp1; 960 longit = lltemp2; 961 } else if ((which1 == 2) && (which2 == 1)) { /*%< reversed */ 962 longit = lltemp1; 963 latit = lltemp2; 964 } else { /*%< some kind of brokenness */ 965 return (0); 966 } 967 break; 968 default: /*%< we didn't get one of each */ 969 return (0); 970 } 971 972 /* altitude */ 973 if (*cp == '-') { 974 altsign = -1; 975 cp++; 976 } 977 978 if (*cp == '+') 979 cp++; 980 981 while (isdigit((unsigned char)*cp)) 982 altmeters = altmeters * 10 + (*cp++ - '0'); 983 984 if (*cp == '.') { /*%< decimal meters */ 985 cp++; 986 if (isdigit((unsigned char)*cp)) { 987 altfrac = (*cp++ - '0') * 10; 988 if (isdigit((unsigned char)*cp)) { 989 altfrac += (*cp++ - '0'); 990 } 991 } 992 } 993 994 alt = (10000000 + (altsign * (altmeters * 100 + altfrac))); 995 996 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 997 cp++; 998 999 while (isspace((unsigned char)*cp) && (cp < maxcp)) 1000 cp++; 1001 1002 if (cp >= maxcp) 1003 goto defaults; 1004 1005 siz = precsize_aton(&cp); 1006 1007 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 1008 cp++; 1009 1010 while (isspace((unsigned char)*cp) && (cp < maxcp)) 1011 cp++; 1012 1013 if (cp >= maxcp) 1014 goto defaults; 1015 1016 hp = precsize_aton(&cp); 1017 1018 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 1019 cp++; 1020 1021 while (isspace((unsigned char)*cp) && (cp < maxcp)) 1022 cp++; 1023 1024 if (cp >= maxcp) 1025 goto defaults; 1026 1027 vp = precsize_aton(&cp); 1028 1029 defaults: 1030 1031 bcp = binary; 1032 *bcp++ = (u_int8_t) 0; /*%< version byte */ 1033 *bcp++ = siz; 1034 *bcp++ = hp; 1035 *bcp++ = vp; 1036 PUTLONG(latit,bcp); 1037 PUTLONG(longit,bcp); 1038 PUTLONG(alt,bcp); 1039 1040 return (16); /*%< size of RR in octets */ 1041 } 1042 1043 /*% takes an on-the-wire LOC RR and formats it in a human readable format. */ 1044 const char * 1045 loc_ntoa(binary, ascii) 1046 const u_char *binary; 1047 char *ascii; 1048 { 1049 static const char *error = "?"; 1050 static char tmpbuf[sizeof 1051 "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"]; 1052 const u_char *cp = binary; 1053 1054 int latdeg, latmin, latsec, latsecfrac; 1055 int longdeg, longmin, longsec, longsecfrac; 1056 char northsouth, eastwest; 1057 const char *altsign; 1058 int altmeters, altfrac; 1059 1060 const u_int32_t referencealt = 100000 * 100; 1061 1062 int32_t latval, longval, altval; 1063 u_int32_t templ; 1064 u_int8_t sizeval, hpval, vpval, versionval; 1065 1066 char *sizestr, *hpstr, *vpstr; 1067 1068 versionval = *cp++; 1069 1070 if (ascii == NULL) 1071 ascii = tmpbuf; 1072 1073 if (versionval) { 1074 (void) sprintf(ascii, "; error: unknown LOC RR version"); 1075 return (ascii); 1076 } 1077 1078 sizeval = *cp++; 1079 1080 hpval = *cp++; 1081 vpval = *cp++; 1082 1083 GETLONG(templ, cp); 1084 latval = (templ - ((unsigned)1<<31)); 1085 1086 GETLONG(templ, cp); 1087 longval = (templ - ((unsigned)1<<31)); 1088 1089 GETLONG(templ, cp); 1090 if (templ < referencealt) { /*%< below WGS 84 spheroid */ 1091 altval = referencealt - templ; 1092 altsign = "-"; 1093 } else { 1094 altval = templ - referencealt; 1095 altsign = ""; 1096 } 1097 1098 if (latval < 0) { 1099 northsouth = 'S'; 1100 latval = -latval; 1101 } else 1102 northsouth = 'N'; 1103 1104 latsecfrac = latval % 1000; 1105 latval = latval / 1000; 1106 latsec = latval % 60; 1107 latval = latval / 60; 1108 latmin = latval % 60; 1109 latval = latval / 60; 1110 latdeg = latval; 1111 1112 if (longval < 0) { 1113 eastwest = 'W'; 1114 longval = -longval; 1115 } else 1116 eastwest = 'E'; 1117 1118 longsecfrac = longval % 1000; 1119 longval = longval / 1000; 1120 longsec = longval % 60; 1121 longval = longval / 60; 1122 longmin = longval % 60; 1123 longval = longval / 60; 1124 longdeg = longval; 1125 1126 altfrac = altval % 100; 1127 altmeters = (altval / 100); 1128 1129 sizestr = strdup(precsize_ntoa((u_int32_t)sizeval)); 1130 hpstr = strdup(precsize_ntoa((u_int32_t)hpval)); 1131 vpstr = strdup(precsize_ntoa((u_int32_t)vpval)); 1132 1133 sprintf(ascii, 1134 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm", 1135 latdeg, latmin, latsec, latsecfrac, northsouth, 1136 longdeg, longmin, longsec, longsecfrac, eastwest, 1137 altsign, altmeters, altfrac, 1138 (sizestr != NULL) ? sizestr : error, 1139 (hpstr != NULL) ? hpstr : error, 1140 (vpstr != NULL) ? vpstr : error); 1141 1142 if (sizestr != NULL) 1143 free(sizestr); 1144 if (hpstr != NULL) 1145 free(hpstr); 1146 if (vpstr != NULL) 1147 free(vpstr); 1148 1149 return (ascii); 1150 } 1151 1152 1153 /*% Return the number of DNS hierarchy levels in the name. */ 1154 int 1155 dn_count_labels(const char *name) { 1156 int i, len, count; 1157 1158 len = strlen(name); 1159 for (i = 0, count = 0; i < len; i++) { 1160 /* XXX need to check for \. or use named's nlabels(). */ 1161 if (name[i] == '.') 1162 count++; 1163 } 1164 1165 /* don't count initial wildcard */ 1166 if (name[0] == '*') 1167 if (count) 1168 count--; 1169 1170 /* don't count the null label for root. */ 1171 /* if terminating '.' not found, must adjust */ 1172 /* count to include last label */ 1173 if (len > 0 && name[len-1] != '.') 1174 count++; 1175 return (count); 1176 } 1177 1178 /*% 1179 * Make dates expressed in seconds-since-Jan-1-1970 easy to read. 1180 * SIG records are required to be printed like this, by the Secure DNS RFC. 1181 */ 1182 char * 1183 p_secstodate (u_long secs) { 1184 /* XXX nonreentrant */ 1185 char *output = p_secstodate_output; 1186 time_t myclock = secs; 1187 struct tm *mytime; 1188 #ifdef HAVE_TIME_R 1189 struct tm res; 1190 1191 mytime = gmtime_r(&myclock, &res); 1192 #else 1193 mytime = gmtime(&myclock); 1194 #endif 1195 mytime->tm_year += 1900; 1196 mytime->tm_mon += 1; 1197 sprintf(output, "%04d%02d%02d%02d%02d%02d", 1198 mytime->tm_year, mytime->tm_mon, mytime->tm_mday, 1199 mytime->tm_hour, mytime->tm_min, mytime->tm_sec); 1200 return (output); 1201 } 1202 1203 u_int16_t 1204 res_nametoclass(const char *buf, int *successp) { 1205 unsigned long result; 1206 char *endptr; 1207 int success; 1208 1209 result = sym_ston(__p_class_syms, buf, &success); 1210 if (success) 1211 goto done; 1212 1213 if (strncasecmp(buf, "CLASS", 5) != 0 || 1214 !isdigit((unsigned char)buf[5])) 1215 goto done; 1216 errno = 0; 1217 result = strtoul(buf + 5, &endptr, 10); 1218 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1219 success = 1; 1220 done: 1221 if (successp) 1222 *successp = success; 1223 return (u_int16_t)(result); 1224 } 1225 1226 u_int16_t 1227 res_nametotype(const char *buf, int *successp) { 1228 unsigned long result; 1229 char *endptr; 1230 int success; 1231 1232 result = sym_ston(__p_type_syms, buf, &success); 1233 if (success) 1234 goto done; 1235 1236 if (strncasecmp(buf, "type", 4) != 0 || 1237 !isdigit((unsigned char)buf[4])) 1238 goto done; 1239 errno = 0; 1240 result = strtoul(buf + 4, &endptr, 10); 1241 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1242 success = 1; 1243 done: 1244 if (successp) 1245 *successp = success; 1246 return (u_int16_t)(result); 1247 } 1248 1249 /*! \file */ 1250
Indexes created Mon Sep 22 10:09:38 GMT 2025