1/* $NetBSD: res_debug.c,v 1.13 2012/06/25 22:32:45 abs 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 101static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93"; 102static 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 1.13 2012/06/25 22:32:45 abs Exp $"); 105#endif 106#endif /* LIBC_SCCS and not lint */ 107 108 109 110#include <sys/types.h> 111#include <sys/param.h> 112#include <sys/socket.h> 113 114#include <netinet/in.h> 115#include <arpa/inet.h> 116#include <arpa/nameser.h> 117 118#include <ctype.h> 119#include <errno.h> 120#include <math.h> 121#include <netdb.h> 122#include "resolv_private.h" 123#include <stdio.h> 124#include <stdlib.h> 125#include <string.h> 126#include <strings.h> 127#include <time.h> 128 129extern const char * const _res_opcodes[]; 130extern const char * const _res_sectioncodes[]; 131 132#ifndef _LIBC 133/* 134 * Print the current options. 135 */ 136void 137fp_resstat(const res_state statp, FILE *file) { 138 u_long mask; 139 140 fprintf(file, ";; res options:"); 141 for (mask = 1; mask != 0U; mask <<= 1) 142 if (statp->options & mask) 143 fprintf(file, " %s", p_option(mask)); 144 putc('\n', file); 145} 146#endif 147 148static void 149do_section(const res_state statp, 150 ns_msg *handle, ns_sect section, 151 int pflag, FILE *file) 152{ 153 int n, sflag, rrnum; 154 int buflen = 2048; 155 char *buf; 156 ns_opcode opcode; 157 ns_rr rr; 158 159 /* 160 * Print answer records. 161 */ 162 sflag = (int)(statp->pfcode & pflag); 163 if (statp->pfcode && !sflag) 164 return; 165 166 buf = malloc((size_t)buflen); 167 if (buf == NULL) { 168 fprintf(file, ";; memory allocation failure\n"); 169 return; 170 } 171 172 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode); 173 rrnum = 0; 174 for (;;) { 175 if (ns_parserr(handle, section, rrnum, &rr)) { 176 if (errno != ENODEV) 177 fprintf(file, ";; ns_parserr: %s\n", 178 strerror(errno)); 179 else if (rrnum > 0 && sflag != 0 && 180 (statp->pfcode & RES_PRF_HEAD1)) 181 putc('\n', file); 182 goto cleanup; 183 } 184 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1)) 185 fprintf(file, ";; %s SECTION:\n", 186 p_section(section, opcode)); 187 if (section == ns_s_qd) 188 fprintf(file, ";;\t%s, type = %s, class = %s\n", 189 ns_rr_name(rr), 190 p_type(ns_rr_type(rr)), 191 p_class(ns_rr_class(rr))); 192 else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) { 193 size_t rdatalen, ttl; 194 uint16_t optcode, optlen; 195 196 rdatalen = ns_rr_rdlen(rr); 197 ttl = ns_rr_ttl(rr); 198 fprintf(file, 199 "; EDNS: version: %zu, udp=%u, flags=%04zx\n", 200 (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff); 201 while (rdatalen >= 4) { 202 const u_char *cp = ns_rr_rdata(rr); 203 int i; 204 205 GETSHORT(optcode, cp); 206 GETSHORT(optlen, cp); 207 208 if (optcode == NS_OPT_NSID) { 209 fputs("; NSID: ", file); 210 if (optlen == 0) { 211 fputs("; NSID\n", file); 212 } else { 213 fputs("; NSID: ", file); 214 for (i = 0; i < optlen; i++) 215 fprintf(file, "%02x ", 216 cp[i]); 217 fputs(" (",file); 218 for (i = 0; i < optlen; i++) 219 fprintf(file, "%c", 220 isprint(cp[i])? 221 cp[i] : '.'); 222 fputs(")\n", file); 223 } 224 } else { 225 if (optlen == 0) { 226 fprintf(file, "; OPT=%u\n", 227 optcode); 228 } else { 229 fprintf(file, "; OPT=%u: ", 230 optcode); 231 for (i = 0; i < optlen; i++) 232 fprintf(file, "%02x ", 233 cp[i]); 234 fputs(" (",file); 235 for (i = 0; i < optlen; i++) 236 fprintf(file, "%c", 237 isprint(cp[i]) ? 238 cp[i] : '.'); 239 fputs(")\n", file); 240 } 241 } 242 rdatalen -= 4 + optlen; 243 } 244 } else { 245 n = ns_sprintrr(handle, &rr, NULL, NULL, 246 buf, (u_int)buflen); 247 if (n < 0) { 248 if (errno == ENOSPC) { 249 free(buf); 250 buf = NULL; 251 if (buflen < 131072) 252 buf = malloc((size_t)(buflen += 1024)); 253 if (buf == NULL) { 254 fprintf(file, 255 ";; memory allocation failure\n"); 256 return; 257 } 258 continue; 259 } 260 fprintf(file, ";; ns_sprintrr: %s\n", 261 strerror(errno)); 262 goto cleanup; 263 } 264 fputs(buf, file); 265 fputc('\n', file); 266 } 267 rrnum++; 268 } 269 cleanup: 270 if (buf != NULL) 271 free(buf); 272} 273 274/* 275 * Print the contents of a query. 276 * This is intended to be primarily a debugging routine. 277 */ 278void 279res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) { 280 ns_msg handle; 281 int qdcount, ancount, nscount, arcount; 282 u_int opcode, rcode, id; 283 284 if (ns_initparse(msg, len, &handle) < 0) { 285 fprintf(file, ";; ns_initparse: %s\n", strerror(errno)); 286 return; 287 } 288 opcode = ns_msg_getflag(handle, ns_f_opcode); 289 rcode = ns_msg_getflag(handle, ns_f_rcode); 290 id = ns_msg_id(handle); 291 qdcount = ns_msg_count(handle, ns_s_qd); 292 ancount = ns_msg_count(handle, ns_s_an); 293 nscount = ns_msg_count(handle, ns_s_ns); 294 arcount = ns_msg_count(handle, ns_s_ar); 295 296 /* 297 * Print header fields. 298 */ 299 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode) 300 fprintf(file, 301 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n", 302 _res_opcodes[opcode], p_rcode((int)rcode), id); 303 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX)) 304 putc(';', file); 305 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) { 306 fprintf(file, "; flags:"); 307 if (ns_msg_getflag(handle, ns_f_qr)) 308 fprintf(file, " qr"); 309 if (ns_msg_getflag(handle, ns_f_aa)) 310 fprintf(file, " aa"); 311 if (ns_msg_getflag(handle, ns_f_tc)) 312 fprintf(file, " tc"); 313 if (ns_msg_getflag(handle, ns_f_rd)) 314 fprintf(file, " rd"); 315 if (ns_msg_getflag(handle, ns_f_ra)) 316 fprintf(file, " ra"); 317 if (ns_msg_getflag(handle, ns_f_z)) 318 fprintf(file, " ??"); 319 if (ns_msg_getflag(handle, ns_f_ad)) 320 fprintf(file, " ad"); 321 if (ns_msg_getflag(handle, ns_f_cd)) 322 fprintf(file, " cd"); 323 } 324 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) { 325 fprintf(file, "; %s: %d", 326 p_section(ns_s_qd, (int)opcode), qdcount); 327 fprintf(file, ", %s: %d", 328 p_section(ns_s_an, (int)opcode), ancount); 329 fprintf(file, ", %s: %d", 330 p_section(ns_s_ns, (int)opcode), nscount); 331 fprintf(file, ", %s: %d", 332 p_section(ns_s_ar, (int)opcode), arcount); 333 } 334 if ((!statp->pfcode) || (statp->pfcode & 335 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) { 336 putc('\n',file); 337 } 338 /* 339 * Print the various sections. 340 */ 341 do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file); 342 do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file); 343 do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file); 344 do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file); 345 if (qdcount == 0 && ancount == 0 && 346 nscount == 0 && arcount == 0) 347 putc('\n', file); 348} 349 350const u_char * 351p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) { 352 char name[MAXDNAME]; 353 int n; 354 355 if ((n = dn_expand(msg, msg + len, cp, name, (int)sizeof name)) < 0) 356 return (NULL); 357 if (name[0] == '\0') 358 putc('.', file); 359 else 360 fputs(name, file); 361 return (cp + n); 362} 363 364const u_char * 365p_cdname(const u_char *cp, const u_char *msg, FILE *file) { 366 return (p_cdnname(cp, msg, PACKETSZ, file)); 367} 368 369/* Return a fully-qualified domain name from a compressed name (with 370 length supplied). */ 371 372const u_char * 373p_fqnname(const u_char *cp, const u_char *msg, int msglen, char *name, 374 int namelen) 375{ 376 int n; 377 size_t newlen; 378 379 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0) 380 return (NULL); 381 newlen = strlen(name); 382 if (newlen == 0 || name[newlen - 1] != '.') { 383 if ((int)newlen + 1 >= namelen) /* Lack space for final dot */ 384 return (NULL); 385 else 386 strcpy(name + newlen, "."); 387 } 388 return (cp + n); 389} 390 391/* XXX: the rest of these functions need to become length-limited, too. */ 392 393const u_char * 394p_fqname(const u_char *cp, const u_char *msg, FILE *file) { 395 char name[MAXDNAME]; 396 const u_char *n; 397 398 n = p_fqnname(cp, msg, MAXCDNAME, name, (int)sizeof name); 399 if (n == NULL) 400 return (NULL); 401 fputs(name, file); 402 return (n); 403} 404 405/* 406 * Names of RR classes and qclasses. Classes and qclasses are the same, except 407 * that C_ANY is a qclass but not a class. (You can ask for records of class 408 * C_ANY, but you can't have any records of that class in the database.) 409 */ 410const struct res_sym __p_class_syms[] = { 411 {C_IN, "IN", (char *)0}, 412 {C_CHAOS, "CH", (char *)0}, 413 {C_CHAOS, "CHAOS", (char *)0}, 414 {C_HS, "HS", (char *)0}, 415 {C_HS, "HESIOD", (char *)0}, 416 {C_ANY, "ANY", (char *)0}, 417 {C_NONE, "NONE", (char *)0}, 418 {C_IN, (char *)0, (char *)0} 419}; 420 421/* 422 * Names of message sections. 423 */ 424static const struct res_sym __p_default_section_syms[] = { 425 {ns_s_qd, "QUERY", (char *)0}, 426 {ns_s_an, "ANSWER", (char *)0}, 427 {ns_s_ns, "AUTHORITY", (char *)0}, 428 {ns_s_ar, "ADDITIONAL", (char *)0}, 429 {0, (char *)0, (char *)0} 430}; 431 432static const struct res_sym __p_update_section_syms[] = { 433 {S_ZONE, "ZONE", (char *)0}, 434 {S_PREREQ, "PREREQUISITE", (char *)0}, 435 {S_UPDATE, "UPDATE", (char *)0}, 436 {S_ADDT, "ADDITIONAL", (char *)0}, 437 {0, (char *)0, (char *)0} 438}; 439 440const struct res_sym __p_key_syms[] = { 441 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"}, 442 {NS_ALG_DH, "DH", "Diffie Hellman"}, 443 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"}, 444 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"}, 445 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"}, 446 {0, NULL, NULL} 447}; 448 449const struct res_sym __p_cert_syms[] = { 450 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"}, 451 {cert_t_spki, "SPKI", "SPKI certificate"}, 452 {cert_t_pgp, "PGP", "PGP certificate"}, 453 {cert_t_url, "URL", "URL Private"}, 454 {cert_t_oid, "OID", "OID Private"}, 455 {0, NULL, NULL} 456}; 457 458/* 459 * Names of RR types and qtypes. Types and qtypes are the same, except 460 * that T_ANY is a qtype but not a type. (You can ask for records of type 461 * T_ANY, but you can't have any records of that type in the database.) 462 */ 463const struct res_sym __p_type_syms[] = { 464 {ns_t_a, "A", "address"}, 465 {ns_t_ns, "NS", "name server"}, 466 {ns_t_md, "MD", "mail destination (deprecated)"}, 467 {ns_t_mf, "MF", "mail forwarder (deprecated)"}, 468 {ns_t_cname, "CNAME", "canonical name"}, 469 {ns_t_soa, "SOA", "start of authority"}, 470 {ns_t_mb, "MB", "mailbox"}, 471 {ns_t_mg, "MG", "mail group member"}, 472 {ns_t_mr, "MR", "mail rename"}, 473 {ns_t_null, "NULL", "null"}, 474 {ns_t_wks, "WKS", "well-known service (deprecated)"}, 475 {ns_t_ptr, "PTR", "domain name pointer"}, 476 {ns_t_hinfo, "HINFO", "host information"}, 477 {ns_t_minfo, "MINFO", "mailbox information"}, 478 {ns_t_mx, "MX", "mail exchanger"}, 479 {ns_t_txt, "TXT", "text"}, 480 {ns_t_rp, "RP", "responsible person"}, 481 {ns_t_afsdb, "AFSDB", "DCE or AFS server"}, 482 {ns_t_x25, "X25", "X25 address"}, 483 {ns_t_isdn, "ISDN", "ISDN address"}, 484 {ns_t_rt, "RT", "router"}, 485 {ns_t_nsap, "NSAP", "nsap address"}, 486 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"}, 487 {ns_t_sig, "SIG", "signature"}, 488 {ns_t_key, "KEY", "key"}, 489 {ns_t_px, "PX", "mapping information"}, 490 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"}, 491 {ns_t_aaaa, "AAAA", "IPv6 address"}, 492 {ns_t_loc, "LOC", "location"}, 493 {ns_t_nxt, "NXT", "next valid name (unimplemented)"}, 494 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"}, 495 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"}, 496 {ns_t_srv, "SRV", "server selection"}, 497 {ns_t_atma, "ATMA", "ATM address (unimplemented)"}, 498 {ns_t_naptr, "NAPTR", "naptr"}, 499 {ns_t_kx, "KX", "key exchange"}, 500 {ns_t_cert, "CERT", "certificate"}, 501 {ns_t_a6, "A", "IPv6 address (experminental)"}, 502 {ns_t_dname, "DNAME", "non-terminal redirection"}, 503 {ns_t_opt, "OPT", "opt"}, 504 {ns_t_apl, "apl", "apl"}, 505 {ns_t_ds, "DS", "delegation signer"}, 506 {ns_t_sshfp, "SSFP", "SSH fingerprint"}, 507 {ns_t_ipseckey, "IPSECKEY", "IPSEC key"}, 508 {ns_t_rrsig, "RRSIG", "rrsig"}, 509 {ns_t_nsec, "NSEC", "nsec"}, 510 {ns_t_dnskey, "DNSKEY", "DNS key"}, 511 {ns_t_dhcid, "DHCID", "dynamic host configuration identifier"}, 512 {ns_t_nsec3, "NSEC3", "nsec3"}, 513 {ns_t_nsec3param, "NSEC3PARAM", "NSEC3 parameters"}, 514 {ns_t_hip, "HIP", "host identity protocol"}, 515 {ns_t_spf, "SPF", "sender policy framework"}, 516 {ns_t_tkey, "TKEY", "tkey"}, 517 {ns_t_tsig, "TSIG", "transaction signature"}, 518 {ns_t_ixfr, "IXFR", "incremental zone transfer"}, 519 {ns_t_axfr, "AXFR", "zone transfer"}, 520 {ns_t_zxfr, "ZXFR", "compressed zone transfer"}, 521 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"}, 522 {ns_t_maila, "MAILA", "mail agent (deprecated)"}, 523 {ns_t_naptr, "NAPTR", "URN Naming Authority"}, 524 {ns_t_kx, "KX", "Key Exchange"}, 525 {ns_t_cert, "CERT", "Certificate"}, 526 {ns_t_a6, "A6", "IPv6 Address"}, 527 {ns_t_dname, "DNAME", "dname"}, 528 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"}, 529 {ns_t_opt, "OPT", "EDNS Options"}, 530 {ns_t_any, "ANY", "\"any\""}, 531 {ns_t_dlv, "DLV", "DNSSEC look-aside validation"}, 532 {0, NULL, NULL} 533}; 534 535/* 536 * Names of DNS rcodes. 537 */ 538const struct res_sym __p_rcode_syms[] = { 539 {ns_r_noerror, "NOERROR", "no error"}, 540 {ns_r_formerr, "FORMERR", "format error"}, 541 {ns_r_servfail, "SERVFAIL", "server failed"}, 542 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"}, 543 {ns_r_notimpl, "NOTIMP", "not implemented"}, 544 {ns_r_refused, "REFUSED", "refused"}, 545 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"}, 546 {ns_r_yxrrset, "YXRRSET", "rrset exists"}, 547 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"}, 548 {ns_r_notauth, "NOTAUTH", "not authoritative"}, 549 {ns_r_notzone, "NOTZONE", "Not in zone"}, 550 {ns_r_max, "", ""}, 551 {ns_r_badsig, "BADSIG", "bad signature"}, 552 {ns_r_badkey, "BADKEY", "bad key"}, 553 {ns_r_badtime, "BADTIME", "bad time"}, 554 {0, NULL, NULL} 555}; 556 557int 558sym_ston(const struct res_sym *syms, const char *name, int *success) { 559 for (; syms->name != 0; syms++) { 560 if (strcasecmp (name, syms->name) == 0) { 561 if (success) 562 *success = 1; 563 return (syms->number); 564 } 565 } 566 if (success) 567 *success = 0; 568 return (syms->number); /* The default value. */ 569} 570 571const char * 572sym_ntos(const struct res_sym *syms, int number, int *success) { 573 static char unname[20]; 574 575 for (; syms->name != 0; syms++) { 576 if (number == syms->number) { 577 if (success) 578 *success = 1; 579 return (syms->name); 580 } 581 } 582 583 snprintf(unname, sizeof(unname), "%d", number); /* XXX nonreentrant */ 584 if (success) 585 *success = 0; 586 return (unname); 587} 588 589const char * 590sym_ntop(const struct res_sym *syms, int number, int *success) { 591 static char unname[20]; 592 593 for (; syms->name != 0; syms++) { 594 if (number == syms->number) { 595 if (success) 596 *success = 1; 597 return (syms->humanname); 598 } 599 } 600 snprintf(unname, sizeof(unname), "%d", number); /* XXX nonreentrant */ 601 if (success) 602 *success = 0; 603 return (unname); 604} 605 606/* 607 * Return a string for the type. 608 */ 609const char * 610p_type(int type) { 611 int success; 612 const char *result; 613 static char typebuf[20]; 614 615 result = sym_ntos(__p_type_syms, type, &success); 616 if (success) 617 return (result); 618 if (type < 0 || type > 0xffff) 619 return ("BADTYPE"); 620 snprintf(typebuf, sizeof(typebuf), "TYPE%d", type); 621 return (typebuf); 622} 623 624/* 625 * Return a string for the type. 626 */ 627const char * 628p_section(int section, int opcode) { 629 const struct res_sym *symbols; 630 631 switch (opcode) { 632 case ns_o_update: 633 symbols = __p_update_section_syms; 634 break; 635 default: 636 symbols = __p_default_section_syms; 637 break; 638 } 639 return (sym_ntos(symbols, section, (int *)0)); 640} 641 642/* 643 * Return a mnemonic for class. 644 */ 645const char * 646p_class(int class) { 647 int success; 648 const char *result; 649 static char classbuf[20]; 650 651 result = sym_ntos(__p_class_syms, class, &success); 652 if (success) 653 return (result); 654 if (class < 0 || class > 0xffff) 655 return ("BADCLASS"); 656 snprintf(classbuf, sizeof(classbuf), "CLASS%d", class); 657 return (classbuf); 658} 659 660/* 661 * Return a mnemonic for an option 662 */ 663const char * 664p_option(u_long option) { 665 static char nbuf[40]; 666 667 switch (option) { 668 case RES_INIT: return "init"; 669 case RES_DEBUG: return "debug"; 670 case RES_AAONLY: return "aaonly(unimpl)"; 671 case RES_USEVC: return "usevc"; 672 case RES_PRIMARY: return "primry(unimpl)"; 673 case RES_IGNTC: return "igntc"; 674 case RES_RECURSE: return "recurs"; 675 case RES_DEFNAMES: return "defnam"; 676 case RES_STAYOPEN: return "styopn"; 677 case RES_DNSRCH: return "dnsrch"; 678 case RES_INSECURE1: return "insecure1"; 679 case RES_INSECURE2: return "insecure2"; 680 case RES_NOALIASES: return "noaliases"; 681 case RES_USE_INET6: return "inet6"; 682#ifdef RES_USE_EDNS0 /* KAME extension */ 683 case RES_USE_EDNS0: return "edns0"; 684#endif 685#ifdef RES_USE_DNAME 686 case RES_USE_DNAME: return "dname"; 687#endif 688#ifdef RES_USE_DNSSEC 689 case RES_USE_DNSSEC: return "dnssec"; 690#endif 691#ifdef RES_NOTLDQUERY 692 case RES_NOTLDQUERY: return "no-tld-query"; 693#endif 694#ifdef RES_NO_NIBBLE2 695 case RES_NO_NIBBLE2: return "no-nibble2"; 696#endif 697 /* XXX nonreentrant */ 698 default: snprintf(nbuf, sizeof(nbuf), "?0x%lx?", (u_long)option); 699 return (nbuf); 700 } 701} 702 703/* 704 * Return a mnemonic for a time to live. 705 */ 706const char * 707p_time(u_int32_t value) { 708 static char nbuf[40]; /* XXX nonreentrant */ 709 710 if (ns_format_ttl((u_long)value, nbuf, sizeof nbuf) < 0) 711 snprintf(nbuf, sizeof(nbuf), "%u", value); 712 return (nbuf); 713} 714 715/* 716 * Return a string for the rcode. 717 */ 718const char * 719p_rcode(int rcode) { 720 return (sym_ntos(__p_rcode_syms, rcode, (int *)0)); 721} 722 723/* 724 * Return a string for a res_sockaddr_union. 725 */ 726const char * 727p_sockun(union res_sockaddr_union u, char *buf, size_t size) { 728 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"]; 729 730 switch (u.sin.sin_family) { 731 case AF_INET: 732 inet_ntop(AF_INET, &u.sin.sin_addr, ret, (socklen_t)sizeof ret); 733 break; 734#ifdef HAS_INET6_STRUCTS 735 case AF_INET6: 736 inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret); 737 break; 738#endif 739 default: 740 snprintf(ret, sizeof(ret), "[af%d]", u.sin.sin_family); 741 break; 742 } 743 if (size > 0U) { 744 strncpy(buf, ret, size - 1); 745 buf[size - 1] = '0'; 746 } 747 return (buf); 748} 749 750/* 751 * routines to convert between on-the-wire RR format and zone file format. 752 * Does not contain conversion to/from decimal degrees; divide or multiply 753 * by 60*60*1000 for that. 754 */ 755 756static const unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000, 757 1000000,10000000,100000000,1000000000}; 758 759/* takes an XeY precision/size value, returns a string representation. */ 760static const char * 761precsize_ntoa(u_int32_t prec) 762{ 763 static char retbuf[sizeof "90000000.00"]; /* XXX nonreentrant */ 764 unsigned long val; 765 int mantissa, exponent; 766 767 mantissa = (int)((prec >> 4) & 0x0f) % 10; 768 exponent = (int)((prec >> 0) & 0x0f) % 10; 769 770 val = mantissa * poweroften[exponent]; 771 772 (void) snprintf(retbuf, sizeof(retbuf), "%lu.%.2lu", val/100, val%100); 773 return (retbuf); 774} 775 776/* converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */ 777static u_int8_t 778precsize_aton(const char **strptr) { 779 unsigned int mval = 0, cmval = 0; 780 u_int8_t retval = 0; 781 const char *cp; 782 int exponent; 783 int mantissa; 784 785 cp = *strptr; 786 787 while (isdigit((unsigned char)*cp)) 788 mval = mval * 10 + (*cp++ - '0'); 789 790 if (*cp == '.') { /* centimeters */ 791 cp++; 792 if (isdigit((unsigned char)*cp)) { 793 cmval = (*cp++ - '0') * 10; 794 if (isdigit((unsigned char)*cp)) { 795 cmval += (*cp++ - '0'); 796 } 797 } 798 } 799 cmval = (mval * 100) + cmval; 800 801 for (exponent = 0; exponent < 9; exponent++) 802 if (cmval < poweroften[exponent+1]) 803 break; 804 805 mantissa = cmval / poweroften[exponent]; 806 if (mantissa > 9) 807 mantissa = 9; 808 809 retval = (mantissa << 4) | exponent; 810 811 *strptr = cp; 812 813 return (retval); 814} 815 816/* converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */ 817static u_int32_t 818latlon2ul(const char **latlonstrptr, int *which) { 819 const char *cp; 820 u_int32_t retval; 821 int deg = 0, min = 0, secs = 0, secsfrac = 0; 822 823 cp = *latlonstrptr; 824 825 while (isdigit((unsigned char)*cp)) 826 deg = deg * 10 + (*cp++ - '0'); 827 828 while (isspace((unsigned char)*cp)) 829 cp++; 830 831 if (!(isdigit((unsigned char)*cp))) 832 goto fndhemi; 833 834 while (isdigit((unsigned char)*cp)) 835 min = min * 10 + (*cp++ - '0'); 836 837 while (isspace((unsigned char)*cp)) 838 cp++; 839 840 if (!(isdigit((unsigned char)*cp))) 841 goto fndhemi; 842 843 while (isdigit((unsigned char)*cp)) 844 secs = secs * 10 + (*cp++ - '0'); 845 846 if (*cp == '.') { /* decimal seconds */ 847 cp++; 848 if (isdigit((unsigned char)*cp)) { 849 secsfrac = (*cp++ - '0') * 100; 850 if (isdigit((unsigned char)*cp)) { 851 secsfrac += (*cp++ - '0') * 10; 852 if (isdigit((unsigned char)*cp)) { 853 secsfrac += (*cp++ - '0'); 854 } 855 } 856 } 857 } 858 859 while (!isspace((unsigned char)*cp)) /* if any trailing garbage */ 860 cp++; 861 862 while (isspace((unsigned char)*cp)) 863 cp++; 864 865 fndhemi: 866 switch (*cp) { 867 case 'N': case 'n': 868 case 'E': case 'e': 869 retval = ((unsigned)1<<31) 870 + (((((deg * 60) + min) * 60) + secs) * 1000) 871 + secsfrac; 872 break; 873 case 'S': case 's': 874 case 'W': case 'w': 875 retval = ((unsigned)1<<31) 876 - (((((deg * 60) + min) * 60) + secs) * 1000) 877 - secsfrac; 878 break; 879 default: 880 retval = 0; /* invalid value -- indicates error */ 881 break; 882 } 883 884 switch (*cp) { 885 case 'N': case 'n': 886 case 'S': case 's': 887 *which = 1; /* latitude */ 888 break; 889 case 'E': case 'e': 890 case 'W': case 'w': 891 *which = 2; /* longitude */ 892 break; 893 default: 894 *which = 0; /* error */ 895 break; 896 } 897 898 cp++; /* skip the hemisphere */ 899 900 while (!isspace((unsigned char)*cp)) /* if any trailing garbage */ 901 cp++; 902 903 while (isspace((unsigned char)*cp)) /* move to next field */ 904 cp++; 905 906 *latlonstrptr = cp; 907 908 return (retval); 909} 910 911/* converts a zone file representation in a string to an RDATA on-the-wire 912 * representation. */ 913int 914loc_aton(const char *ascii, u_char *binary) 915{ 916 const char *cp, *maxcp; 917 u_char *bcp; 918 919 u_int32_t latit = 0, longit = 0, alt = 0; 920 u_int32_t lltemp1 = 0, lltemp2 = 0; 921 int altmeters = 0, altfrac = 0, altsign = 1; 922 u_int8_t hp = 0x16; /* default = 1e6 cm = 10000.00m = 10km */ 923 u_int8_t vp = 0x13; /* default = 1e3 cm = 10.00m */ 924 u_int8_t siz = 0x12; /* default = 1e2 cm = 1.00m */ 925 int which1 = 0, which2 = 0; 926 927 cp = ascii; 928 maxcp = cp + strlen(ascii); 929 930 lltemp1 = latlon2ul(&cp, &which1); 931 932 lltemp2 = latlon2ul(&cp, &which2); 933 934 switch (which1 + which2) { 935 case 3: /* 1 + 2, the only valid combination */ 936 if ((which1 == 1) && (which2 == 2)) { /* normal case */ 937 latit = lltemp1; 938 longit = lltemp2; 939 } else if ((which1 == 2) && (which2 == 1)) { /* reversed */ 940 longit = lltemp1; 941 latit = lltemp2; 942 } else { /* some kind of brokenness */ 943 return (0); 944 } 945 break; 946 default: /* we didn't get one of each */ 947 return (0); 948 } 949 950 /* altitude */ 951 if (*cp == '-') { 952 altsign = -1; 953 cp++; 954 } 955 956 if (*cp == '+') 957 cp++; 958 959 while (isdigit((unsigned char)*cp)) 960 altmeters = altmeters * 10 + (*cp++ - '0'); 961 962 if (*cp == '.') { /* decimal meters */ 963 cp++; 964 if (isdigit((unsigned char)*cp)) { 965 altfrac = (*cp++ - '0') * 10; 966 if (isdigit((unsigned char)*cp)) { 967 altfrac += (*cp++ - '0'); 968 } 969 } 970 } 971 972 alt = (10000000 + (altsign * (altmeters * 100 + altfrac))); 973 974 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */ 975 cp++; 976 977 while (isspace((unsigned char)*cp) && (cp < maxcp)) 978 cp++; 979 980 if (cp >= maxcp) 981 goto defaults; 982 983 siz = precsize_aton(&cp); 984 985 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */ 986 cp++; 987 988 while (isspace((unsigned char)*cp) && (cp < maxcp)) 989 cp++; 990 991 if (cp >= maxcp) 992 goto defaults; 993 994 hp = precsize_aton(&cp); 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 vp = precsize_aton(&cp); 1006 1007 defaults: 1008 1009 bcp = binary; 1010 *bcp++ = (u_int8_t) 0; /* version byte */ 1011 *bcp++ = siz; 1012 *bcp++ = hp; 1013 *bcp++ = vp; 1014 PUTLONG(latit,bcp); 1015 PUTLONG(longit,bcp); 1016 PUTLONG(alt,bcp); 1017 1018 return (16); /* size of RR in octets */ 1019} 1020 1021/* takes an on-the-wire LOC RR and formats it in a human readable format. */ 1022const char * 1023loc_ntoa(const u_char *binary, char *ascii, size_t bufsiz) 1024{ 1025 static const char *error = "?"; 1026 static char tmpbuf[sizeof 1027"1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"]; 1028 const u_char *cp = binary; 1029 1030 int latdeg, latmin, latsec, latsecfrac; 1031 int longdeg, longmin, longsec, longsecfrac; 1032 char northsouth, eastwest; 1033 const char *altsign; 1034 int altmeters, altfrac; 1035 1036 const u_int32_t referencealt = 100000 * 100; 1037 1038 int32_t latval, longval, altval; 1039 u_int32_t templ; 1040 u_int8_t sizeval, hpval, vpval, versionval; 1041 1042 char *sizestr, *hpstr, *vpstr; 1043 1044 versionval = *cp++; 1045 1046 if (ascii == NULL) 1047 ascii = tmpbuf; 1048 1049 if (versionval) { 1050 (void) snprintf(ascii, bufsiz, "; error: unknown LOC RR version"); 1051 return (ascii); 1052 } 1053 1054 sizeval = *cp++; 1055 1056 hpval = *cp++; 1057 vpval = *cp++; 1058 1059 GETLONG(templ, cp); 1060 latval = (templ - ((unsigned)1<<31)); 1061 1062 GETLONG(templ, cp); 1063 longval = (templ - ((unsigned)1<<31)); 1064 1065 GETLONG(templ, cp); 1066 if (templ < referencealt) { /* below WGS 84 spheroid */ 1067 altval = referencealt - templ; 1068 altsign = "-"; 1069 } else { 1070 altval = templ - referencealt; 1071 altsign = ""; 1072 } 1073 1074 if (latval < 0) { 1075 northsouth = 'S'; 1076 latval = -latval; 1077 } else 1078 northsouth = 'N'; 1079 1080 latsecfrac = latval % 1000; 1081 latval = latval / 1000; 1082 latsec = latval % 60; 1083 latval = latval / 60; 1084 latmin = latval % 60; 1085 latval = latval / 60; 1086 latdeg = latval; 1087 1088 if (longval < 0) { 1089 eastwest = 'W'; 1090 longval = -longval; 1091 } else 1092 eastwest = 'E'; 1093 1094 longsecfrac = longval % 1000; 1095 longval = longval / 1000; 1096 longsec = longval % 60; 1097 longval = longval / 60; 1098 longmin = longval % 60; 1099 longval = longval / 60; 1100 longdeg = longval; 1101 1102 altfrac = altval % 100; 1103 altmeters = (altval / 100); 1104 1105 sizestr = strdup(precsize_ntoa((u_int32_t)sizeval)); 1106 hpstr = strdup(precsize_ntoa((u_int32_t)hpval)); 1107 vpstr = strdup(precsize_ntoa((u_int32_t)vpval)); 1108 1109 snprintf(ascii, bufsiz, 1110 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm", 1111 latdeg, latmin, latsec, latsecfrac, northsouth, 1112 longdeg, longmin, longsec, longsecfrac, eastwest, 1113 altsign, altmeters, altfrac, 1114 (sizestr != NULL) ? sizestr : error, 1115 (hpstr != NULL) ? hpstr : error, 1116 (vpstr != NULL) ? vpstr : error); 1117 1118 if (sizestr != NULL) 1119 free(sizestr); 1120 if (hpstr != NULL) 1121 free(hpstr); 1122 if (vpstr != NULL) 1123 free(vpstr); 1124 1125 return (ascii); 1126} 1127 1128 1129/* Return the number of DNS hierarchy levels in the name. */ 1130int 1131dn_count_labels(const char *name) { 1132 size_t len, i, count; 1133 1134 len = strlen(name); 1135 for (i = 0, count = 0; i < len; i++) { 1136 /* XXX need to check for \. or use named's nlabels(). */ 1137 if (name[i] == '.') 1138 count++; 1139 } 1140 1141 /* don't count initial wildcard */ 1142 if (name[0] == '*') 1143 if (count) 1144 count--; 1145 1146 /* don't count the null label for root. */ 1147 /* if terminating '.' not found, must adjust */ 1148 /* count to include last label */ 1149 if (len > 0 && name[len-1] != '.') 1150 count++; 1151 _DIAGASSERT(__type_fit(int, count)); 1152 return (int)count; 1153} 1154 1155 1156/* 1157 * Make dates expressed in seconds-since-Jan-1-1970 easy to read. 1158 * SIG records are required to be printed like this, by the Secure DNS RFC. 1159 */ 1160char * 1161p_secstodate (u_long secs) { 1162 /* XXX nonreentrant */ 1163 static char output[15]; /* YYYYMMDDHHMMSS and null */ 1164 time_t myclock = secs; 1165 struct tm *mytime; 1166#ifdef HAVE_TIME_R 1167 struct tm res; 1168 1169 mytime = gmtime_r(&myclock, &res); 1170#else 1171 mytime = gmtime(&myclock); 1172#endif 1173 mytime->tm_year += 1900; 1174 mytime->tm_mon += 1; 1175 snprintf(output, sizeof(output), "%04d%02d%02d%02d%02d%02d", 1176 mytime->tm_year, mytime->tm_mon, mytime->tm_mday, 1177 mytime->tm_hour, mytime->tm_min, mytime->tm_sec); 1178 return (output); 1179} 1180 1181u_int16_t 1182res_nametoclass(const char *buf, int *successp) { 1183 unsigned long result; 1184 char *endptr; 1185 int success; 1186 1187 result = sym_ston(__p_class_syms, buf, &success); 1188 if (success) 1189 goto done; 1190 1191 if (strncasecmp(buf, "CLASS", 5) != 0 || 1192 !isdigit((unsigned char)buf[5])) 1193 goto done; 1194 errno = 0; 1195 result = strtoul(buf + 5, &endptr, 10); 1196 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1197 success = 1; 1198 done: 1199 if (successp) 1200 *successp = success; 1201 return (u_int16_t)(result); 1202} 1203 1204u_int16_t 1205res_nametotype(const char *buf, int *successp) { 1206 unsigned long result; 1207 char *endptr; 1208 int success; 1209 1210 result = sym_ston(__p_type_syms, buf, &success); 1211 if (success) 1212 goto done; 1213 1214 if (strncasecmp(buf, "type", 4) != 0 || 1215 !isdigit((unsigned char)buf[4])) 1216 goto done; 1217 errno = 0; 1218 result = strtoul(buf + 4, &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