1/* $NetBSD: res_debug.c,v 1.14 2015/02/24 17:56:20 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#if defined(LIBC_SCCS) && !defined(lint) 95static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93"; 96static const char rcsid[] = "$Id: res_debug.c,v 1.19 2009/02/26 11:20:20 tbox Exp $"; 97#endif /* LIBC_SCCS and not lint */ 98 99#include "port_before.h" 100 101#include <sys/types.h> 102#include <sys/param.h> 103#include <sys/socket.h> 104 105#include <netinet/in.h> 106#include <arpa/inet.h> 107#include <arpa/nameser.h> 108 109#include <assert.h> 110#include <ctype.h> 111#include <errno.h> 112#include <math.h> 113#include <netdb.h> 114#include <resolv.h> 115#include <resolv_mt.h> 116#include <stdio.h> 117#include <stdlib.h> 118#include <string.h> 119#include <time.h> 120 121#include "port_after.h" 122 123#ifdef SPRINTF_CHAR 124# define SPRINTF(x) strlen(sprintf/**/x) 125#else 126# define SPRINTF(x) sprintf x 127#endif 128 129extern const char *_res_opcodes[]; 130extern const char *_res_sectioncodes[]; 131 132#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 */ 144void 145fp_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 156static void 157do_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 */ 288void 289res_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 360const u_char * 361p_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 374const u_char * 375p_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 383const u_char * 384p_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 404const u_char * 405p_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 */ 421const 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 */ 435const 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 443const 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 451const 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 460const 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 */ 474const 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 (experminental)"}, 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 */ 549const 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 568int 569sym_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 582const char * 583sym_ntos(const struct res_sym *syms, int number, int *success) { 584 char *unname = sym_ntos_unname; 585 586 for (; syms->name != 0; syms++) { 587 if (number == syms->number) { 588 if (success) 589 *success = 1; 590 return (syms->name); 591 } 592 } 593 594 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 595 if (success) 596 *success = 0; 597 return (unname); 598} 599 600const char * 601sym_ntop(const struct res_sym *syms, int number, int *success) { 602 char *unname = sym_ntop_unname; 603 604 for (; syms->name != 0; syms++) { 605 if (number == syms->number) { 606 if (success) 607 *success = 1; 608 return (syms->humanname); 609 } 610 } 611 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 612 if (success) 613 *success = 0; 614 return (unname); 615} 616 617/*% 618 * Return a string for the type. 619 */ 620const char * 621p_type(int type) { 622 int success; 623 const char *result; 624 static char typebuf[20]; 625 626 result = sym_ntos(__p_type_syms, type, &success); 627 if (success) 628 return (result); 629 if (type < 0 || type > 0xffff) 630 return ("BADTYPE"); 631 sprintf(typebuf, "TYPE%d", type); 632 return (typebuf); 633} 634 635/*% 636 * Return a string for the type. 637 */ 638const char * 639p_section(int section, int opcode) { 640 const struct res_sym *symbols; 641 642 switch (opcode) { 643 case ns_o_update: 644 symbols = __p_update_section_syms; 645 break; 646 default: 647 symbols = __p_default_section_syms; 648 break; 649 } 650 return (sym_ntos(symbols, section, (int *)0)); 651} 652 653/*% 654 * Return a mnemonic for class. 655 */ 656const char * 657p_class(int class) { 658 int success; 659 const char *result; 660 static char classbuf[20]; 661 662 result = sym_ntos(__p_class_syms, class, &success); 663 if (success) 664 return (result); 665 if (class < 0 || class > 0xffff) 666 return ("BADCLASS"); 667 sprintf(classbuf, "CLASS%d", class); 668 return (classbuf); 669} 670 671/*% 672 * Return a mnemonic for an option 673 */ 674const char * 675p_option(u_long option) { 676 char *nbuf = p_option_nbuf; 677 678 switch (option) { 679 case RES_INIT: return "init"; 680 case RES_DEBUG: return "debug"; 681 case RES_AAONLY: return "aaonly(unimpl)"; 682 case RES_USEVC: return "usevc"; 683 case RES_PRIMARY: return "primry(unimpl)"; 684 case RES_IGNTC: return "igntc"; 685 case RES_RECURSE: return "recurs"; 686 case RES_DEFNAMES: return "defnam"; 687 case RES_STAYOPEN: return "styopn"; 688 case RES_DNSRCH: return "dnsrch"; 689 case RES_INSECURE1: return "insecure1"; 690 case RES_INSECURE2: return "insecure2"; 691 case RES_NOALIASES: return "noaliases"; 692 case RES_USE_INET6: return "inet6"; 693 case RES_USE_INET4: return "inet4"; 694#ifdef RES_USE_EDNS0 /*%< KAME extension */ 695 case RES_USE_EDNS0: return "edns0"; 696 case RES_NSID: return "nsid"; 697#endif 698#ifdef RES_USE_DNAME 699 case RES_USE_DNAME: return "dname"; 700#endif 701#ifdef RES_USE_DNSSEC 702 case RES_USE_DNSSEC: return "dnssec"; 703#endif 704#ifdef RES_NOTLDQUERY 705 case RES_NOTLDQUERY: return "no-tld-query"; 706#endif 707#ifdef RES_NO_NIBBLE2 708 case RES_NO_NIBBLE2: return "no-nibble2"; 709#endif 710 /* XXX nonreentrant */ 711 default: sprintf(nbuf, "?0x%lx?", (u_long)option); 712 return (nbuf); 713 } 714} 715 716/*% 717 * Return a mnemonic for a time to live. 718 */ 719const char * 720p_time(u_int32_t value) { 721 char *nbuf = p_time_nbuf; 722 723 if (ns_format_ttl((u_long)value, nbuf, sizeof nbuf) < 0) 724 sprintf(nbuf, "%u", value); 725 return (nbuf); 726} 727 728/*% 729 * Return a string for the rcode. 730 */ 731const char * 732p_rcode(int rcode) { 733 return (sym_ntos(__p_rcode_syms, rcode, (int *)0)); 734} 735 736/*% 737 * Return a string for a res_sockaddr_union. 738 */ 739const char * 740p_sockun(union res_sockaddr_union u, char *buf, size_t size) { 741 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"]; 742 743 switch (u.sin.sin_family) { 744 case AF_INET: 745 inet_ntop(AF_INET, &u.sin.sin_addr, ret, (socklen_t)sizeof ret); 746 break; 747#ifdef HAS_INET6_STRUCTS 748 case AF_INET6: 749 inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret); 750 break; 751#endif 752 default: 753 sprintf(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 769static 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. */ 773static const char * 774precsize_ntoa(u_int32_t prec) 775{ 776 char *retbuf = precsize_ntoa_retbuf; 777 unsigned long val; 778 int mantissa, exponent; 779 780 mantissa = (int)((prec >> 4) & 0x0f) % 10; 781 exponent = (int)((prec >> 0) & 0x0f) % 10; 782 783 val = mantissa * poweroften[exponent]; 784 785 (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100); 786 return (retbuf); 787} 788 789/*% converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */ 790static u_int8_t 791precsize_aton(const char **strptr) { 792 unsigned int mval = 0, cmval = 0; 793 u_int8_t retval = 0; 794 const char *cp; 795 int exponent; 796 int mantissa; 797 798 cp = *strptr; 799 800 while (isdigit((unsigned char)*cp)) 801 mval = mval * 10 + (*cp++ - '0'); 802 803 if (*cp == '.') { /*%< centimeters */ 804 cp++; 805 if (isdigit((unsigned char)*cp)) { 806 cmval = (*cp++ - '0') * 10; 807 if (isdigit((unsigned char)*cp)) { 808 cmval += (*cp++ - '0'); 809 } 810 } 811 } 812 cmval = (mval * 100) + cmval; 813 814 for (exponent = 0; exponent < 9; exponent++) 815 if (cmval < poweroften[exponent+1]) 816 break; 817 818 mantissa = cmval / poweroften[exponent]; 819 if (mantissa > 9) 820 mantissa = 9; 821 822 retval = (mantissa << 4) | exponent; 823 824 *strptr = cp; 825 826 return (retval); 827} 828 829/*% converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */ 830static u_int32_t 831latlon2ul(const char **latlonstrptr, int *which) { 832 const char *cp; 833 u_int32_t retval; 834 int deg = 0, min = 0, secs = 0, secsfrac = 0; 835 836 cp = *latlonstrptr; 837 838 while (isdigit((unsigned char)*cp)) 839 deg = deg * 10 + (*cp++ - '0'); 840 841 while (isspace((unsigned char)*cp)) 842 cp++; 843 844 if (!(isdigit((unsigned char)*cp))) 845 goto fndhemi; 846 847 while (isdigit((unsigned char)*cp)) 848 min = min * 10 + (*cp++ - '0'); 849 850 while (isspace((unsigned char)*cp)) 851 cp++; 852 853 if (!(isdigit((unsigned char)*cp))) 854 goto fndhemi; 855 856 while (isdigit((unsigned char)*cp)) 857 secs = secs * 10 + (*cp++ - '0'); 858 859 if (*cp == '.') { /*%< decimal seconds */ 860 cp++; 861 if (isdigit((unsigned char)*cp)) { 862 secsfrac = (*cp++ - '0') * 100; 863 if (isdigit((unsigned char)*cp)) { 864 secsfrac += (*cp++ - '0') * 10; 865 if (isdigit((unsigned char)*cp)) { 866 secsfrac += (*cp++ - '0'); 867 } 868 } 869 } 870 } 871 872 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 873 cp++; 874 875 while (isspace((unsigned char)*cp)) 876 cp++; 877 878 fndhemi: 879 switch (*cp) { 880 case 'N': case 'n': 881 case 'E': case 'e': 882 retval = ((unsigned)1<<31) 883 + (((((deg * 60) + min) * 60) + secs) * 1000) 884 + secsfrac; 885 break; 886 case 'S': case 's': 887 case 'W': case 'w': 888 retval = ((unsigned)1<<31) 889 - (((((deg * 60) + min) * 60) + secs) * 1000) 890 - secsfrac; 891 break; 892 default: 893 retval = 0; /*%< invalid value -- indicates error */ 894 break; 895 } 896 897 switch (*cp) { 898 case 'N': case 'n': 899 case 'S': case 's': 900 *which = 1; /*%< latitude */ 901 break; 902 case 'E': case 'e': 903 case 'W': case 'w': 904 *which = 2; /*%< longitude */ 905 break; 906 default: 907 *which = 0; /*%< error */ 908 break; 909 } 910 911 cp++; /*%< skip the hemisphere */ 912 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 913 cp++; 914 915 while (isspace((unsigned char)*cp)) /*%< move to next field */ 916 cp++; 917 918 *latlonstrptr = cp; 919 920 return (retval); 921} 922 923/*% 924 * converts a zone file representation in a string to an RDATA on-the-wire 925 * representation. */ 926int 927loc_aton(const char *ascii, u_char *binary) 928{ 929 const char *cp, *maxcp; 930 u_char *bcp; 931 932 u_int32_t latit = 0, longit = 0, alt = 0; 933 u_int32_t lltemp1 = 0, lltemp2 = 0; 934 int altmeters = 0, altfrac = 0, altsign = 1; 935 u_int8_t hp = 0x16; /*%< default = 1e6 cm = 10000.00m = 10km */ 936 u_int8_t vp = 0x13; /*%< default = 1e3 cm = 10.00m */ 937 u_int8_t siz = 0x12; /*%< default = 1e2 cm = 1.00m */ 938 int which1 = 0, which2 = 0; 939 940 cp = ascii; 941 maxcp = cp + strlen(ascii); 942 943 lltemp1 = latlon2ul(&cp, &which1); 944 945 lltemp2 = latlon2ul(&cp, &which2); 946 947 switch (which1 + which2) { 948 case 3: /*%< 1 + 2, the only valid combination */ 949 if ((which1 == 1) && (which2 == 2)) { /*%< normal case */ 950 latit = lltemp1; 951 longit = lltemp2; 952 } else if ((which1 == 2) && (which2 == 1)) { /*%< reversed */ 953 longit = lltemp1; 954 latit = lltemp2; 955 } else { /*%< some kind of brokenness */ 956 return (0); 957 } 958 break; 959 default: /*%< we didn't get one of each */ 960 return (0); 961 } 962 963 /* altitude */ 964 if (*cp == '-') { 965 altsign = -1; 966 cp++; 967 } 968 969 if (*cp == '+') 970 cp++; 971 972 while (isdigit((unsigned char)*cp)) 973 altmeters = altmeters * 10 + (*cp++ - '0'); 974 975 if (*cp == '.') { /*%< decimal meters */ 976 cp++; 977 if (isdigit((unsigned char)*cp)) { 978 altfrac = (*cp++ - '0') * 10; 979 if (isdigit((unsigned char)*cp)) { 980 altfrac += (*cp++ - '0'); 981 } 982 } 983 } 984 985 alt = (10000000 + (altsign * (altmeters * 100 + altfrac))); 986 987 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 988 cp++; 989 990 while (isspace((unsigned char)*cp) && (cp < maxcp)) 991 cp++; 992 993 if (cp >= maxcp) 994 goto defaults; 995 996 siz = precsize_aton(&cp); 997 998 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 999 cp++; 1000 1001 while (isspace((unsigned char)*cp) && (cp < maxcp)) 1002 cp++; 1003 1004 if (cp >= maxcp) 1005 goto defaults; 1006 1007 hp = precsize_aton(&cp); 1008 1009 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 1010 cp++; 1011 1012 while (isspace((unsigned char)*cp) && (cp < maxcp)) 1013 cp++; 1014 1015 if (cp >= maxcp) 1016 goto defaults; 1017 1018 vp = precsize_aton(&cp); 1019 1020 defaults: 1021 1022 bcp = binary; 1023 *bcp++ = (u_int8_t) 0; /*%< version byte */ 1024 *bcp++ = siz; 1025 *bcp++ = hp; 1026 *bcp++ = vp; 1027 PUTLONG(latit,bcp); 1028 PUTLONG(longit,bcp); 1029 PUTLONG(alt,bcp); 1030 1031 return (16); /*%< size of RR in octets */ 1032} 1033 1034/*% takes an on-the-wire LOC RR and formats it in a human readable format. */ 1035const char * 1036loc_ntoa(const u_char *binary, char *ascii) 1037{ 1038 static const char *error = "?"; 1039 static char tmpbuf[sizeof 1040"1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"]; 1041 const u_char *cp = binary; 1042 1043 int latdeg, latmin, latsec, latsecfrac; 1044 int longdeg, longmin, longsec, longsecfrac; 1045 char northsouth, eastwest; 1046 const char *altsign; 1047 int altmeters, altfrac; 1048 1049 const u_int32_t referencealt = 100000 * 100; 1050 1051 int32_t latval, longval, altval; 1052 u_int32_t templ; 1053 u_int8_t sizeval, hpval, vpval, versionval; 1054 1055 char *sizestr, *hpstr, *vpstr; 1056 1057 versionval = *cp++; 1058 1059 if (ascii == NULL) 1060 ascii = tmpbuf; 1061 1062 if (versionval) { 1063 (void) sprintf(ascii, "; error: unknown LOC RR version"); 1064 return (ascii); 1065 } 1066 1067 sizeval = *cp++; 1068 1069 hpval = *cp++; 1070 vpval = *cp++; 1071 1072 GETLONG(templ, cp); 1073 latval = (templ - ((unsigned)1<<31)); 1074 1075 GETLONG(templ, cp); 1076 longval = (templ - ((unsigned)1<<31)); 1077 1078 GETLONG(templ, cp); 1079 if (templ < referencealt) { /*%< below WGS 84 spheroid */ 1080 altval = referencealt - templ; 1081 altsign = "-"; 1082 } else { 1083 altval = templ - referencealt; 1084 altsign = ""; 1085 } 1086 1087 if (latval < 0) { 1088 northsouth = 'S'; 1089 latval = -latval; 1090 } else 1091 northsouth = 'N'; 1092 1093 latsecfrac = latval % 1000; 1094 latval = latval / 1000; 1095 latsec = latval % 60; 1096 latval = latval / 60; 1097 latmin = latval % 60; 1098 latval = latval / 60; 1099 latdeg = latval; 1100 1101 if (longval < 0) { 1102 eastwest = 'W'; 1103 longval = -longval; 1104 } else 1105 eastwest = 'E'; 1106 1107 longsecfrac = longval % 1000; 1108 longval = longval / 1000; 1109 longsec = longval % 60; 1110 longval = longval / 60; 1111 longmin = longval % 60; 1112 longval = longval / 60; 1113 longdeg = longval; 1114 1115 altfrac = altval % 100; 1116 altmeters = (altval / 100); 1117 1118 sizestr = strdup(precsize_ntoa((u_int32_t)sizeval)); 1119 hpstr = strdup(precsize_ntoa((u_int32_t)hpval)); 1120 vpstr = strdup(precsize_ntoa((u_int32_t)vpval)); 1121 1122 sprintf(ascii, 1123 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm", 1124 latdeg, latmin, latsec, latsecfrac, northsouth, 1125 longdeg, longmin, longsec, longsecfrac, eastwest, 1126 altsign, altmeters, altfrac, 1127 (sizestr != NULL) ? sizestr : error, 1128 (hpstr != NULL) ? hpstr : error, 1129 (vpstr != NULL) ? vpstr : error); 1130 1131 if (sizestr != NULL) 1132 free(sizestr); 1133 if (hpstr != NULL) 1134 free(hpstr); 1135 if (vpstr != NULL) 1136 free(vpstr); 1137 1138 return (ascii); 1139} 1140 1141 1142/*% Return the number of DNS hierarchy levels in the name. */ 1143int 1144dn_count_labels(const char *name) { 1145 size_t len, i, count; 1146 1147 len = strlen(name); 1148 for (i = 0, count = 0; i < len; i++) { 1149 /* XXX need to check for \. or use named's nlabels(). */ 1150 if (name[i] == '.') 1151 count++; 1152 } 1153 1154 /* don't count initial wildcard */ 1155 if (name[0] == '*') 1156 if (count) 1157 count--; 1158 1159 /* don't count the null label for root. */ 1160 /* if terminating '.' not found, must adjust */ 1161 /* count to include last label */ 1162 if (len > 0 && name[len-1] != '.') 1163 count++; 1164 assert(count <= (size_t)INT_MAX); 1165 return (int)count; 1166} 1167 1168/*% 1169 * Make dates expressed in seconds-since-Jan-1-1970 easy to read. 1170 * SIG records are required to be printed like this, by the Secure DNS RFC. 1171 */ 1172char * 1173p_secstodate (u_long secs) { 1174 /* XXX nonreentrant */ 1175 char *output = p_secstodate_output; 1176 time_t myclock = secs; 1177 struct tm *mytime; 1178#ifdef HAVE_TIME_R 1179 struct tm res; 1180 1181 mytime = gmtime_r(&myclock, &res); 1182#else 1183 mytime = gmtime(&myclock); 1184#endif 1185 mytime->tm_year += 1900; 1186 mytime->tm_mon += 1; 1187 sprintf(output, "%04d%02d%02d%02d%02d%02d", 1188 mytime->tm_year, mytime->tm_mon, mytime->tm_mday, 1189 mytime->tm_hour, mytime->tm_min, mytime->tm_sec); 1190 return (output); 1191} 1192 1193u_int16_t 1194res_nametoclass(const char *buf, int *successp) { 1195 unsigned long result; 1196 char *endptr; 1197 int success; 1198 1199 result = sym_ston(__p_class_syms, buf, &success); 1200 if (success) 1201 goto done; 1202 1203 if (strncasecmp(buf, "CLASS", 5) != 0 || 1204 !isdigit((unsigned char)buf[5])) 1205 goto done; 1206 errno = 0; 1207 result = strtoul(buf + 5, &endptr, 10); 1208 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1209 success = 1; 1210 done: 1211 if (successp) 1212 *successp = success; 1213 return (u_int16_t)(result); 1214} 1215 1216u_int16_t 1217res_nametotype(const char *buf, int *successp) { 1218 unsigned long result; 1219 char *endptr; 1220 int success; 1221 1222 result = sym_ston(__p_type_syms, buf, &success); 1223 if (success) 1224 goto done; 1225 1226 if (strncasecmp(buf, "type", 4) != 0 || 1227 !isdigit((unsigned char)buf[4])) 1228 goto done; 1229 errno = 0; 1230 result = strtoul(buf + 4, &endptr, 10); 1231 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1232 success = 1; 1233 done: 1234 if (successp) 1235 *successp = success; 1236 return (u_int16_t)(result); 1237} 1238 1239/*! \file */ 1240