res_debug.c revision 288114
1/* 2 * Portions Copyright (C) 2004, 2005, 2008, 2009 Internet Systems Consortium, Inc. ("ISC") 3 * Portions Copyright (C) 1996-2003 Internet Software Consortium. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 15 * PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18/* 19 * Copyright (c) 1985 20 * The Regents of the University of California. All rights reserved. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the above copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 4. Neither the name of the University nor the names of its contributors 31 * may be used to endorse or promote products derived from this software 32 * without specific prior written permission. 33 * 34 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 35 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 36 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 37 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 38 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 39 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 40 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 41 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 42 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 43 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 44 * SUCH DAMAGE. 45 */ 46 47/* 48 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 49 * 50 * Permission to use, copy, modify, and distribute this software for any 51 * purpose with or without fee is hereby granted, provided that the above 52 * copyright notice and this permission notice appear in all copies, and that 53 * the name of Digital Equipment Corporation not be used in advertising or 54 * publicity pertaining to distribution of the document or software without 55 * specific, written prior permission. 56 * 57 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 58 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 59 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 60 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 61 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 62 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 63 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 64 * SOFTWARE. 65 */ 66 67/* 68 * Portions Copyright (c) 1995 by International Business Machines, Inc. 69 * 70 * International Business Machines, Inc. (hereinafter called IBM) grants 71 * permission under its copyrights to use, copy, modify, and distribute this 72 * Software with or without fee, provided that the above copyright notice and 73 * all paragraphs of this notice appear in all copies, and that the name of IBM 74 * not be used in connection with the marketing of any product incorporating 75 * the Software or modifications thereof, without specific, written prior 76 * permission. 77 * 78 * To the extent it has a right to do so, IBM grants an immunity from suit 79 * under its patents, if any, for the use, sale or manufacture of products to 80 * the extent that such products are used for performing Domain Name System 81 * dynamic updates in TCP/IP networks by means of the Software. No immunity is 82 * granted for any product per se or for any other function of any product. 83 * 84 * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES, 85 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 86 * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL, 87 * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING 88 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN 89 * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES. 90 */ 91 92#if defined(LIBC_SCCS) && !defined(lint) 93static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93"; 94static const char rcsid[] = "$Id: res_debug.c,v 1.19 2009/02/26 11:20:20 tbox Exp $"; 95#endif /* LIBC_SCCS and not lint */ 96#include <sys/cdefs.h> 97__FBSDID("$FreeBSD: head/lib/libc/resolv/res_debug.c 288114 2015-09-22 15:57:26Z rodrigc $"); 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 <ctype.h> 110#include <errno.h> 111#include <math.h> 112#include <netdb.h> 113#include <resolv.h> 114#include <resolv_mt.h> 115#include <stdio.h> 116#include <stdlib.h> 117#include <string.h> 118#include <time.h> 119 120#include "port_after.h" 121 122#ifdef SPRINTF_CHAR 123# define SPRINTF(x) strlen(sprintf/**/x) 124#else 125# define SPRINTF(x) sprintf x 126#endif 127 128extern const char *_res_opcodes[]; 129extern const char *_res_sectioncodes[]; 130 131/*% 132 * Print the current options. 133 */ 134void 135fp_resstat(const res_state statp, FILE *file) { 136 u_long mask; 137 138 fprintf(file, ";; res options:"); 139 for (mask = 1; mask != 0U; mask <<= 1) 140 if (statp->options & mask) 141 fprintf(file, " %s", p_option(mask)); 142 putc('\n', file); 143} 144 145static void 146do_section(const res_state statp, 147 ns_msg *handle, ns_sect section, 148 int pflag, FILE *file) 149{ 150 int n, sflag, rrnum; 151 static int buflen = 2048; 152 char *buf; 153 ns_opcode opcode; 154 ns_rr rr; 155 156 /* 157 * Print answer records. 158 */ 159 sflag = (statp->pfcode & pflag); 160 if (statp->pfcode && !sflag) 161 return; 162 163 buf = malloc(buflen); 164 if (buf == NULL) { 165 fprintf(file, ";; memory allocation failure\n"); 166 return; 167 } 168 169 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode); 170 rrnum = 0; 171 for (;;) { 172 if (ns_parserr(handle, section, rrnum, &rr)) { 173 if (errno != ENODEV) 174 fprintf(file, ";; ns_parserr: %s\n", 175 strerror(errno)); 176 else if (rrnum > 0 && sflag != 0 && 177 (statp->pfcode & RES_PRF_HEAD1)) 178 putc('\n', file); 179 goto cleanup; 180 } 181 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1)) 182 fprintf(file, ";; %s SECTION:\n", 183 p_section(section, opcode)); 184 if (section == ns_s_qd) 185 fprintf(file, ";;\t%s, type = %s, class = %s\n", 186 ns_rr_name(rr), 187 p_type(ns_rr_type(rr)), 188 p_class(ns_rr_class(rr))); 189 else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) { 190 u_int16_t optcode, optlen, rdatalen = ns_rr_rdlen(rr); 191 u_int32_t ttl = ns_rr_ttl(rr); 192 193 fprintf(file, 194 "; EDNS: version: %u, udp=%u, flags=%04x\n", 195 (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff); 196 197 while (rdatalen >= 4) { 198 const u_char *cp = ns_rr_rdata(rr); 199 int i; 200 201 GETSHORT(optcode, cp); 202 GETSHORT(optlen, cp); 203 204 if (optcode == NS_OPT_NSID) { 205 fputs("; NSID: ", file); 206 if (optlen == 0) { 207 fputs("; NSID\n", file); 208 } else { 209 fputs("; NSID: ", file); 210 for (i = 0; i < optlen; i++) 211 fprintf(file, "%02x ", 212 cp[i]); 213 fputs(" (",file); 214 for (i = 0; i < optlen; i++) 215 fprintf(file, "%c", 216 isprint(cp[i])? 217 cp[i] : '.'); 218 fputs(")\n", file); 219 } 220 } else { 221 if (optlen == 0) { 222 fprintf(file, "; OPT=%u\n", 223 optcode); 224 } else { 225 fprintf(file, "; OPT=%u: ", 226 optcode); 227 for (i = 0; i < optlen; i++) 228 fprintf(file, "%02x ", 229 cp[i]); 230 fputs(" (",file); 231 for (i = 0; i < optlen; i++) 232 fprintf(file, "%c", 233 isprint(cp[i]) ? 234 cp[i] : '.'); 235 fputs(")\n", file); 236 } 237 } 238 rdatalen -= 4 + optlen; 239 } 240 } else { 241 n = ns_sprintrr(handle, &rr, NULL, NULL, 242 buf, buflen); 243 if (n < 0) { 244 if (errno == ENOSPC) { 245 free(buf); 246 buf = NULL; 247 if (buflen < 131072) 248 buf = malloc(buflen += 1024); 249 if (buf == NULL) { 250 fprintf(file, 251 ";; memory allocation failure\n"); 252 return; 253 } 254 continue; 255 } 256 fprintf(file, ";; ns_sprintrr: %s\n", 257 strerror(errno)); 258 goto cleanup; 259 } 260 fputs(buf, file); 261 fputc('\n', file); 262 } 263 rrnum++; 264 } 265 cleanup: 266 if (buf != NULL) 267 free(buf); 268} 269 270/*% 271 * Print the contents of a query. 272 * This is intended to be primarily a debugging routine. 273 */ 274void 275res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) { 276 ns_msg handle; 277 int qdcount, ancount, nscount, arcount; 278 u_int opcode, rcode, id; 279 280 if (ns_initparse(msg, len, &handle) < 0) { 281 fprintf(file, ";; ns_initparse: %s\n", strerror(errno)); 282 return; 283 } 284 opcode = ns_msg_getflag(handle, ns_f_opcode); 285 rcode = ns_msg_getflag(handle, ns_f_rcode); 286 id = ns_msg_id(handle); 287 qdcount = ns_msg_count(handle, ns_s_qd); 288 ancount = ns_msg_count(handle, ns_s_an); 289 nscount = ns_msg_count(handle, ns_s_ns); 290 arcount = ns_msg_count(handle, ns_s_ar); 291 292 /* 293 * Print header fields. 294 */ 295 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode) 296 fprintf(file, 297 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n", 298 _res_opcodes[opcode], p_rcode(rcode), id); 299 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX)) 300 putc(';', file); 301 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) { 302 fprintf(file, "; flags:"); 303 if (ns_msg_getflag(handle, ns_f_qr)) 304 fprintf(file, " qr"); 305 if (ns_msg_getflag(handle, ns_f_aa)) 306 fprintf(file, " aa"); 307 if (ns_msg_getflag(handle, ns_f_tc)) 308 fprintf(file, " tc"); 309 if (ns_msg_getflag(handle, ns_f_rd)) 310 fprintf(file, " rd"); 311 if (ns_msg_getflag(handle, ns_f_ra)) 312 fprintf(file, " ra"); 313 if (ns_msg_getflag(handle, ns_f_z)) 314 fprintf(file, " ??"); 315 if (ns_msg_getflag(handle, ns_f_ad)) 316 fprintf(file, " ad"); 317 if (ns_msg_getflag(handle, ns_f_cd)) 318 fprintf(file, " cd"); 319 } 320 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) { 321 fprintf(file, "; %s: %d", 322 p_section(ns_s_qd, opcode), qdcount); 323 fprintf(file, ", %s: %d", 324 p_section(ns_s_an, opcode), ancount); 325 fprintf(file, ", %s: %d", 326 p_section(ns_s_ns, opcode), nscount); 327 fprintf(file, ", %s: %d", 328 p_section(ns_s_ar, opcode), arcount); 329 } 330 if ((!statp->pfcode) || (statp->pfcode & 331 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) { 332 putc('\n',file); 333 } 334 /* 335 * Print the various sections. 336 */ 337 do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file); 338 do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file); 339 do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file); 340 do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file); 341 if (qdcount == 0 && ancount == 0 && 342 nscount == 0 && arcount == 0) 343 putc('\n', file); 344} 345 346const u_char * 347p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) { 348 char name[MAXDNAME]; 349 int n; 350 351 if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0) 352 return (NULL); 353 if (name[0] == '\0') 354 putc('.', file); 355 else 356 fputs(name, file); 357 return (cp + n); 358} 359 360const u_char * 361p_cdname(const u_char *cp, const u_char *msg, FILE *file) { 362 return (p_cdnname(cp, msg, PACKETSZ, file)); 363} 364 365/*% 366 * Return a fully-qualified domain name from a compressed name (with 367 length supplied). */ 368 369const u_char * 370p_fqnname(const u_char *cp, const u_char *msg, int msglen, char *name, 371 int namelen) 372{ 373 int n, newlen; 374 375 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0) 376 return (NULL); 377 newlen = strlen(name); 378 if (newlen == 0 || name[newlen - 1] != '.') { 379 if (newlen + 1 >= namelen) /*%< Lack space for final dot */ 380 return (NULL); 381 else 382 strcpy(name + newlen, "."); 383 } 384 return (cp + n); 385} 386 387/* XXX: the rest of these functions need to become length-limited, too. */ 388 389const u_char * 390p_fqname(const u_char *cp, const u_char *msg, FILE *file) { 391 char name[MAXDNAME]; 392 const u_char *n; 393 394 n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name); 395 if (n == NULL) 396 return (NULL); 397 fputs(name, file); 398 return (n); 399} 400 401/*% 402 * Names of RR classes and qclasses. Classes and qclasses are the same, except 403 * that C_ANY is a qclass but not a class. (You can ask for records of class 404 * C_ANY, but you can't have any records of that class in the database.) 405 */ 406const struct res_sym __p_class_syms[] = { 407 {C_IN, "IN", (char *)0}, 408 {C_CHAOS, "CH", (char *)0}, 409 {C_CHAOS, "CHAOS", (char *)0}, 410 {C_HS, "HS", (char *)0}, 411 {C_HS, "HESIOD", (char *)0}, 412 {C_ANY, "ANY", (char *)0}, 413 {C_NONE, "NONE", (char *)0}, 414 {C_IN, (char *)0, (char *)0} 415}; 416 417/*% 418 * Names of message sections. 419 */ 420static const struct res_sym __p_default_section_syms[] = { 421 {ns_s_qd, "QUERY", (char *)0}, 422 {ns_s_an, "ANSWER", (char *)0}, 423 {ns_s_ns, "AUTHORITY", (char *)0}, 424 {ns_s_ar, "ADDITIONAL", (char *)0}, 425 {0, (char *)0, (char *)0} 426}; 427 428static const struct res_sym __p_update_section_syms[] = { 429 {S_ZONE, "ZONE", (char *)0}, 430 {S_PREREQ, "PREREQUISITE", (char *)0}, 431 {S_UPDATE, "UPDATE", (char *)0}, 432 {S_ADDT, "ADDITIONAL", (char *)0}, 433 {0, (char *)0, (char *)0} 434}; 435 436const struct res_sym __p_key_syms[] = { 437 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"}, 438 {NS_ALG_DH, "DH", "Diffie Hellman"}, 439 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"}, 440 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"}, 441 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"}, 442 {0, NULL, NULL} 443}; 444 445const struct res_sym __p_cert_syms[] = { 446 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"}, 447 {cert_t_spki, "SPKI", "SPKI certificate"}, 448 {cert_t_pgp, "PGP", "PGP certificate"}, 449 {cert_t_url, "URL", "URL Private"}, 450 {cert_t_oid, "OID", "OID Private"}, 451 {0, NULL, NULL} 452}; 453 454/*% 455 * Names of RR types and qtypes. Types and qtypes are the same, except 456 * that T_ANY is a qtype but not a type. (You can ask for records of type 457 * T_ANY, but you can't have any records of that type in the database.) 458 */ 459const struct res_sym __p_type_syms[] = { 460 {ns_t_a, "A", "address"}, 461 {ns_t_ns, "NS", "name server"}, 462 {ns_t_md, "MD", "mail destination (deprecated)"}, 463 {ns_t_mf, "MF", "mail forwarder (deprecated)"}, 464 {ns_t_cname, "CNAME", "canonical name"}, 465 {ns_t_soa, "SOA", "start of authority"}, 466 {ns_t_mb, "MB", "mailbox"}, 467 {ns_t_mg, "MG", "mail group member"}, 468 {ns_t_mr, "MR", "mail rename"}, 469 {ns_t_null, "NULL", "null"}, 470 {ns_t_wks, "WKS", "well-known service (deprecated)"}, 471 {ns_t_ptr, "PTR", "domain name pointer"}, 472 {ns_t_hinfo, "HINFO", "host information"}, 473 {ns_t_minfo, "MINFO", "mailbox information"}, 474 {ns_t_mx, "MX", "mail exchanger"}, 475 {ns_t_txt, "TXT", "text"}, 476 {ns_t_rp, "RP", "responsible person"}, 477 {ns_t_afsdb, "AFSDB", "DCE or AFS server"}, 478 {ns_t_x25, "X25", "X25 address"}, 479 {ns_t_isdn, "ISDN", "ISDN address"}, 480 {ns_t_rt, "RT", "router"}, 481 {ns_t_nsap, "NSAP", "nsap address"}, 482 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"}, 483 {ns_t_sig, "SIG", "signature"}, 484 {ns_t_key, "KEY", "key"}, 485 {ns_t_px, "PX", "mapping information"}, 486 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"}, 487 {ns_t_aaaa, "AAAA", "IPv6 address"}, 488 {ns_t_loc, "LOC", "location"}, 489 {ns_t_nxt, "NXT", "next valid name (unimplemented)"}, 490 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"}, 491 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"}, 492 {ns_t_srv, "SRV", "server selection"}, 493 {ns_t_atma, "ATMA", "ATM address (unimplemented)"}, 494 {ns_t_naptr, "NAPTR", "naptr"}, 495 {ns_t_kx, "KX", "key exchange"}, 496 {ns_t_cert, "CERT", "certificate"}, 497 {ns_t_a6, "A", "IPv6 address (experminental)"}, 498 {ns_t_dname, "DNAME", "non-terminal redirection"}, 499 {ns_t_opt, "OPT", "opt"}, 500 {ns_t_apl, "apl", "apl"}, 501 {ns_t_ds, "DS", "delegation signer"}, 502 {ns_t_sshfp, "SSFP", "SSH fingerprint"}, 503 {ns_t_ipseckey, "IPSECKEY", "IPSEC key"}, 504 {ns_t_rrsig, "RRSIG", "rrsig"}, 505 {ns_t_nsec, "NSEC", "nsec"}, 506 {ns_t_dnskey, "DNSKEY", "DNS key"}, 507 {ns_t_dhcid, "DHCID", "dynamic host configuration identifier"}, 508 {ns_t_nsec3, "NSEC3", "nsec3"}, 509 {ns_t_nsec3param, "NSEC3PARAM", "NSEC3 parameters"}, 510 {ns_t_hip, "HIP", "host identity protocol"}, 511 {ns_t_spf, "SPF", "sender policy framework"}, 512 {ns_t_tkey, "TKEY", "tkey"}, 513 {ns_t_tsig, "TSIG", "transaction signature"}, 514 {ns_t_ixfr, "IXFR", "incremental zone transfer"}, 515 {ns_t_axfr, "AXFR", "zone transfer"}, 516 {ns_t_zxfr, "ZXFR", "compressed zone transfer"}, 517 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"}, 518 {ns_t_maila, "MAILA", "mail agent (deprecated)"}, 519 {ns_t_naptr, "NAPTR", "URN Naming Authority"}, 520 {ns_t_kx, "KX", "Key Exchange"}, 521 {ns_t_cert, "CERT", "Certificate"}, 522 {ns_t_a6, "A6", "IPv6 Address"}, 523 {ns_t_dname, "DNAME", "dname"}, 524 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"}, 525 {ns_t_opt, "OPT", "EDNS Options"}, 526 {ns_t_any, "ANY", "\"any\""}, 527 {ns_t_dlv, "DLV", "DNSSEC look-aside validation"}, 528 {0, NULL, NULL} 529}; 530 531/*% 532 * Names of DNS rcodes. 533 */ 534const struct res_sym __p_rcode_syms[] = { 535 {ns_r_noerror, "NOERROR", "no error"}, 536 {ns_r_formerr, "FORMERR", "format error"}, 537 {ns_r_servfail, "SERVFAIL", "server failed"}, 538 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"}, 539 {ns_r_notimpl, "NOTIMP", "not implemented"}, 540 {ns_r_refused, "REFUSED", "refused"}, 541 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"}, 542 {ns_r_yxrrset, "YXRRSET", "rrset exists"}, 543 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"}, 544 {ns_r_notauth, "NOTAUTH", "not authoritative"}, 545 {ns_r_notzone, "NOTZONE", "Not in zone"}, 546 {ns_r_max, "", ""}, 547 {ns_r_badsig, "BADSIG", "bad signature"}, 548 {ns_r_badkey, "BADKEY", "bad key"}, 549 {ns_r_badtime, "BADTIME", "bad time"}, 550 {0, NULL, NULL} 551}; 552 553int 554sym_ston(const struct res_sym *syms, const char *name, int *success) { 555 for ((void)NULL; syms->name != 0; syms++) { 556 if (strcasecmp (name, syms->name) == 0) { 557 if (success) 558 *success = 1; 559 return (syms->number); 560 } 561 } 562 if (success) 563 *success = 0; 564 return (syms->number); /*%< The default value. */ 565} 566 567const char * 568sym_ntos(const struct res_sym *syms, int number, int *success) { 569 char *unname = sym_ntos_unname; 570 571 for ((void)NULL; syms->name != 0; syms++) { 572 if (number == syms->number) { 573 if (success) 574 *success = 1; 575 return (syms->name); 576 } 577 } 578 579 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 580 if (success) 581 *success = 0; 582 return (unname); 583} 584 585const char * 586sym_ntop(const struct res_sym *syms, int number, int *success) { 587 char *unname = sym_ntop_unname; 588 589 for ((void)NULL; syms->name != 0; syms++) { 590 if (number == syms->number) { 591 if (success) 592 *success = 1; 593 return (syms->humanname); 594 } 595 } 596 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 597 if (success) 598 *success = 0; 599 return (unname); 600} 601 602/*% 603 * Return a string for the type. 604 */ 605const char * 606p_type(int type) { 607 int success; 608 const char *result; 609 static char typebuf[20]; 610 611 result = sym_ntos(__p_type_syms, type, &success); 612 if (success) 613 return (result); 614 if (type < 0 || type > 0xffff) 615 return ("BADTYPE"); 616 sprintf(typebuf, "TYPE%d", type); 617 return (typebuf); 618} 619 620/*% 621 * Return a string for the type. 622 */ 623const char * 624p_section(int section, int opcode) { 625 const struct res_sym *symbols; 626 627 switch (opcode) { 628 case ns_o_update: 629 symbols = __p_update_section_syms; 630 break; 631 default: 632 symbols = __p_default_section_syms; 633 break; 634 } 635 return (sym_ntos(symbols, section, (int *)0)); 636} 637 638/*% 639 * Return a mnemonic for class. 640 */ 641const char * 642p_class(int class) { 643 int success; 644 const char *result; 645 static char classbuf[20]; 646 647 result = sym_ntos(__p_class_syms, class, &success); 648 if (success) 649 return (result); 650 if (class < 0 || class > 0xffff) 651 return ("BADCLASS"); 652 sprintf(classbuf, "CLASS%d", class); 653 return (classbuf); 654} 655 656/*% 657 * Return a mnemonic for an option 658 */ 659const char * 660p_option(u_long option) { 661 char *nbuf = p_option_nbuf; 662 663 switch (option) { 664 case RES_INIT: return "init"; 665 case RES_DEBUG: return "debug"; 666 case RES_AAONLY: return "aaonly(unimpl)"; 667 case RES_USEVC: return "usevc"; 668 case RES_PRIMARY: return "primry(unimpl)"; 669 case RES_IGNTC: return "igntc"; 670 case RES_RECURSE: return "recurs"; 671 case RES_DEFNAMES: return "defnam"; 672 case RES_STAYOPEN: return "styopn"; 673 case RES_DNSRCH: return "dnsrch"; 674 case RES_INSECURE1: return "insecure1"; 675 case RES_INSECURE2: return "insecure2"; 676 case RES_NOALIASES: return "noaliases"; 677 case RES_USE_INET6: return "inet6"; 678#ifdef RES_USE_EDNS0 /*%< KAME extension */ 679 case RES_USE_EDNS0: return "edns0"; 680 case RES_NSID: return "nsid"; 681#endif 682#ifdef RES_USE_DNAME 683 case RES_USE_DNAME: return "dname"; 684#endif 685#ifdef RES_USE_DNSSEC 686 case RES_USE_DNSSEC: return "dnssec"; 687#endif 688#ifdef RES_NOTLDQUERY 689 case RES_NOTLDQUERY: return "no-tld-query"; 690#endif 691#ifdef RES_NO_NIBBLE2 692 case RES_NO_NIBBLE2: return "no-nibble2"; 693#endif 694 /* XXX nonreentrant */ 695 default: sprintf(nbuf, "?0x%lx?", (u_long)option); 696 return (nbuf); 697 } 698} 699 700/*% 701 * Return a mnemonic for a time to live. 702 */ 703const char * 704p_time(u_int32_t value) { 705 char *nbuf = p_time_nbuf; 706 707 if (ns_format_ttl(value, nbuf, sizeof nbuf) < 0) 708 sprintf(nbuf, "%u", value); 709 return (nbuf); 710} 711 712/*% 713 * Return a string for the rcode. 714 */ 715const char * 716p_rcode(int rcode) { 717 return (sym_ntos(__p_rcode_syms, rcode, (int *)0)); 718} 719 720/*% 721 * Return a string for a res_sockaddr_union. 722 */ 723const char * 724p_sockun(union res_sockaddr_union u, char *buf, size_t size) { 725 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"]; 726 727 switch (u.sin.sin_family) { 728 case AF_INET: 729 inet_ntop(AF_INET, &u.sin.sin_addr, ret, sizeof ret); 730 break; 731#ifdef HAS_INET6_STRUCTS 732 case AF_INET6: 733 inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret); 734 break; 735#endif 736 default: 737 sprintf(ret, "[af%d]", u.sin.sin_family); 738 break; 739 } 740 if (size > 0U) { 741 strncpy(buf, ret, size - 1); 742 buf[size - 1] = '0'; 743 } 744 return (buf); 745} 746 747/*% 748 * routines to convert between on-the-wire RR format and zone file format. 749 * Does not contain conversion to/from decimal degrees; divide or multiply 750 * by 60*60*1000 for that. 751 */ 752 753static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000, 754 1000000,10000000,100000000,1000000000}; 755 756/*% takes an XeY precision/size value, returns a string representation. */ 757static const char * 758precsize_ntoa(u_int8_t prec) 759{ 760 char *retbuf = precsize_ntoa_retbuf; 761 unsigned long val; 762 int mantissa, exponent; 763 764 mantissa = (int)((prec >> 4) & 0x0f) % 10; 765 exponent = (int)((prec >> 0) & 0x0f) % 10; 766 767 val = mantissa * poweroften[exponent]; 768 769 (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100); 770 return (retbuf); 771} 772 773/*% converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */ 774static u_int8_t 775precsize_aton(const char **strptr) { 776 unsigned int mval = 0, cmval = 0; 777 u_int8_t retval = 0; 778 const char *cp; 779 int exponent; 780 int mantissa; 781 782 cp = *strptr; 783 784 while (isdigit((unsigned char)*cp)) 785 mval = mval * 10 + (*cp++ - '0'); 786 787 if (*cp == '.') { /*%< centimeters */ 788 cp++; 789 if (isdigit((unsigned char)*cp)) { 790 cmval = (*cp++ - '0') * 10; 791 if (isdigit((unsigned char)*cp)) { 792 cmval += (*cp++ - '0'); 793 } 794 } 795 } 796 cmval = (mval * 100) + cmval; 797 798 for (exponent = 0; exponent < 9; exponent++) 799 if (cmval < poweroften[exponent+1]) 800 break; 801 802 mantissa = cmval / poweroften[exponent]; 803 if (mantissa > 9) 804 mantissa = 9; 805 806 retval = (mantissa << 4) | exponent; 807 808 *strptr = cp; 809 810 return (retval); 811} 812 813/*% converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */ 814static u_int32_t 815latlon2ul(const char **latlonstrptr, int *which) { 816 const char *cp; 817 u_int32_t retval; 818 int deg = 0, min = 0, secs = 0, secsfrac = 0; 819 820 cp = *latlonstrptr; 821 822 while (isdigit((unsigned char)*cp)) 823 deg = deg * 10 + (*cp++ - '0'); 824 825 while (isspace((unsigned char)*cp)) 826 cp++; 827 828 if (!(isdigit((unsigned char)*cp))) 829 goto fndhemi; 830 831 while (isdigit((unsigned char)*cp)) 832 min = min * 10 + (*cp++ - '0'); 833 834 while (isspace((unsigned char)*cp)) 835 cp++; 836 837 if (!(isdigit((unsigned char)*cp))) 838 goto fndhemi; 839 840 while (isdigit((unsigned char)*cp)) 841 secs = secs * 10 + (*cp++ - '0'); 842 843 if (*cp == '.') { /*%< decimal seconds */ 844 cp++; 845 if (isdigit((unsigned char)*cp)) { 846 secsfrac = (*cp++ - '0') * 100; 847 if (isdigit((unsigned char)*cp)) { 848 secsfrac += (*cp++ - '0') * 10; 849 if (isdigit((unsigned char)*cp)) { 850 secsfrac += (*cp++ - '0'); 851 } 852 } 853 } 854 } 855 856 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 857 cp++; 858 859 while (isspace((unsigned char)*cp)) 860 cp++; 861 862 fndhemi: 863 switch (*cp) { 864 case 'N': case 'n': 865 case 'E': case 'e': 866 retval = ((unsigned)1<<31) 867 + (((((deg * 60) + min) * 60) + secs) * 1000) 868 + secsfrac; 869 break; 870 case 'S': case 's': 871 case 'W': case 'w': 872 retval = ((unsigned)1<<31) 873 - (((((deg * 60) + min) * 60) + secs) * 1000) 874 - secsfrac; 875 break; 876 default: 877 retval = 0; /*%< invalid value -- indicates error */ 878 break; 879 } 880 881 switch (*cp) { 882 case 'N': case 'n': 883 case 'S': case 's': 884 *which = 1; /*%< latitude */ 885 break; 886 case 'E': case 'e': 887 case 'W': case 'w': 888 *which = 2; /*%< longitude */ 889 break; 890 default: 891 *which = 0; /*%< error */ 892 break; 893 } 894 895 cp++; /*%< skip the hemisphere */ 896 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 897 cp++; 898 899 while (isspace((unsigned char)*cp)) /*%< move to next field */ 900 cp++; 901 902 *latlonstrptr = cp; 903 904 return (retval); 905} 906 907/*% 908 * converts a zone file representation in a string to an RDATA on-the-wire 909 * representation. */ 910int 911loc_aton(const char *ascii, u_char *binary) 912{ 913 const char *cp, *maxcp; 914 u_char *bcp; 915 916 u_int32_t latit = 0, longit = 0, alt = 0; 917 u_int32_t lltemp1 = 0, lltemp2 = 0; 918 int altmeters = 0, altfrac = 0, altsign = 1; 919 u_int8_t hp = 0x16; /*%< default = 1e6 cm = 10000.00m = 10km */ 920 u_int8_t vp = 0x13; /*%< default = 1e3 cm = 10.00m */ 921 u_int8_t siz = 0x12; /*%< default = 1e2 cm = 1.00m */ 922 int which1 = 0, which2 = 0; 923 924 cp = ascii; 925 maxcp = cp + strlen(ascii); 926 927 lltemp1 = latlon2ul(&cp, &which1); 928 929 lltemp2 = latlon2ul(&cp, &which2); 930 931 switch (which1 + which2) { 932 case 3: /*%< 1 + 2, the only valid combination */ 933 if ((which1 == 1) && (which2 == 2)) { /*%< normal case */ 934 latit = lltemp1; 935 longit = lltemp2; 936 } else if ((which1 == 2) && (which2 == 1)) { /*%< reversed */ 937 longit = lltemp1; 938 latit = lltemp2; 939 } else { /*%< some kind of brokenness */ 940 return (0); 941 } 942 break; 943 default: /*%< we didn't get one of each */ 944 return (0); 945 } 946 947 /* altitude */ 948 if (*cp == '-') { 949 altsign = -1; 950 cp++; 951 } 952 953 if (*cp == '+') 954 cp++; 955 956 while (isdigit((unsigned char)*cp)) 957 altmeters = altmeters * 10 + (*cp++ - '0'); 958 959 if (*cp == '.') { /*%< decimal meters */ 960 cp++; 961 if (isdigit((unsigned char)*cp)) { 962 altfrac = (*cp++ - '0') * 10; 963 if (isdigit((unsigned char)*cp)) { 964 altfrac += (*cp++ - '0'); 965 } 966 } 967 } 968 969 alt = (10000000 + (altsign * (altmeters * 100 + altfrac))); 970 971 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 972 cp++; 973 974 while (isspace((unsigned char)*cp) && (cp < maxcp)) 975 cp++; 976 977 if (cp >= maxcp) 978 goto defaults; 979 980 siz = precsize_aton(&cp); 981 982 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 983 cp++; 984 985 while (isspace((unsigned char)*cp) && (cp < maxcp)) 986 cp++; 987 988 if (cp >= maxcp) 989 goto defaults; 990 991 hp = precsize_aton(&cp); 992 993 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 994 cp++; 995 996 while (isspace((unsigned char)*cp) && (cp < maxcp)) 997 cp++; 998 999 if (cp >= maxcp) 1000 goto defaults; 1001 1002 vp = precsize_aton(&cp); 1003 1004 defaults: 1005 1006 bcp = binary; 1007 *bcp++ = (u_int8_t) 0; /*%< version byte */ 1008 *bcp++ = siz; 1009 *bcp++ = hp; 1010 *bcp++ = vp; 1011 PUTLONG(latit,bcp); 1012 PUTLONG(longit,bcp); 1013 PUTLONG(alt,bcp); 1014 1015 return (16); /*%< size of RR in octets */ 1016} 1017 1018/*% takes an on-the-wire LOC RR and formats it in a human readable format. */ 1019const char * 1020loc_ntoa(const u_char *binary, char *ascii) 1021{ 1022 static const char *error = "?"; 1023 static char tmpbuf[sizeof 1024"1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"]; 1025 const u_char *cp = binary; 1026 1027 int latdeg, latmin, latsec, latsecfrac; 1028 int longdeg, longmin, longsec, longsecfrac; 1029 char northsouth, eastwest; 1030 const char *altsign; 1031 int altmeters, altfrac; 1032 1033 const u_int32_t referencealt = 100000 * 100; 1034 1035 int32_t latval, longval, altval; 1036 u_int32_t templ; 1037 u_int8_t sizeval, hpval, vpval, versionval; 1038 1039 char *sizestr, *hpstr, *vpstr; 1040 1041 versionval = *cp++; 1042 1043 if (ascii == NULL) 1044 ascii = tmpbuf; 1045 1046 if (versionval) { 1047 (void) sprintf(ascii, "; error: unknown LOC RR version"); 1048 return (ascii); 1049 } 1050 1051 sizeval = *cp++; 1052 1053 hpval = *cp++; 1054 vpval = *cp++; 1055 1056 GETLONG(templ, cp); 1057 latval = (templ - ((unsigned)1<<31)); 1058 1059 GETLONG(templ, cp); 1060 longval = (templ - ((unsigned)1<<31)); 1061 1062 GETLONG(templ, cp); 1063 if (templ < referencealt) { /*%< below WGS 84 spheroid */ 1064 altval = referencealt - templ; 1065 altsign = "-"; 1066 } else { 1067 altval = templ - referencealt; 1068 altsign = ""; 1069 } 1070 1071 if (latval < 0) { 1072 northsouth = 'S'; 1073 latval = -latval; 1074 } else 1075 northsouth = 'N'; 1076 1077 latsecfrac = latval % 1000; 1078 latval = latval / 1000; 1079 latsec = latval % 60; 1080 latval = latval / 60; 1081 latmin = latval % 60; 1082 latval = latval / 60; 1083 latdeg = latval; 1084 1085 if (longval < 0) { 1086 eastwest = 'W'; 1087 longval = -longval; 1088 } else 1089 eastwest = 'E'; 1090 1091 longsecfrac = longval % 1000; 1092 longval = longval / 1000; 1093 longsec = longval % 60; 1094 longval = longval / 60; 1095 longmin = longval % 60; 1096 longval = longval / 60; 1097 longdeg = longval; 1098 1099 altfrac = altval % 100; 1100 altmeters = (altval / 100); 1101 1102 sizestr = strdup(precsize_ntoa(sizeval)); 1103 hpstr = strdup(precsize_ntoa(hpval)); 1104 vpstr = strdup(precsize_ntoa(vpval)); 1105 1106 sprintf(ascii, 1107 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm", 1108 latdeg, latmin, latsec, latsecfrac, northsouth, 1109 longdeg, longmin, longsec, longsecfrac, eastwest, 1110 altsign, altmeters, altfrac, 1111 (sizestr != NULL) ? sizestr : error, 1112 (hpstr != NULL) ? hpstr : error, 1113 (vpstr != NULL) ? vpstr : error); 1114 1115 if (sizestr != NULL) 1116 free(sizestr); 1117 if (hpstr != NULL) 1118 free(hpstr); 1119 if (vpstr != NULL) 1120 free(vpstr); 1121 1122 return (ascii); 1123} 1124 1125 1126/*% Return the number of DNS hierarchy levels in the name. */ 1127int 1128dn_count_labels(const char *name) { 1129 int i, len, count; 1130 1131 len = strlen(name); 1132 for (i = 0, count = 0; i < len; i++) { 1133 /* XXX need to check for \. or use named's nlabels(). */ 1134 if (name[i] == '.') 1135 count++; 1136 } 1137 1138 /* don't count initial wildcard */ 1139 if (name[0] == '*') 1140 if (count) 1141 count--; 1142 1143 /* don't count the null label for root. */ 1144 /* if terminating '.' not found, must adjust */ 1145 /* count to include last label */ 1146 if (len > 0 && name[len-1] != '.') 1147 count++; 1148 return (count); 1149} 1150 1151/*% 1152 * Make dates expressed in seconds-since-Jan-1-1970 easy to read. 1153 * SIG records are required to be printed like this, by the Secure DNS RFC. 1154 */ 1155char * 1156p_secstodate (u_long secs) { 1157 char *output = p_secstodate_output; 1158 time_t clock = secs; 1159 struct tm *time; 1160#ifdef HAVE_TIME_R 1161 struct tm res; 1162 1163 time = gmtime_r(&clock, &res); 1164#else 1165 time = gmtime(&clock); 1166#endif 1167 time->tm_year += 1900; 1168 time->tm_mon += 1; 1169 sprintf(output, "%04d%02d%02d%02d%02d%02d", 1170 time->tm_year, time->tm_mon, time->tm_mday, 1171 time->tm_hour, time->tm_min, time->tm_sec); 1172 return (output); 1173} 1174 1175u_int16_t 1176res_nametoclass(const char *buf, int *successp) { 1177 unsigned long result; 1178 char *endptr; 1179 int success; 1180 1181 result = sym_ston(__p_class_syms, buf, &success); 1182 if (success) 1183 goto done; 1184 1185 if (strncasecmp(buf, "CLASS", 5) != 0 || 1186 !isdigit((unsigned char)buf[5])) 1187 goto done; 1188 errno = 0; 1189 result = strtoul(buf + 5, &endptr, 10); 1190 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1191 success = 1; 1192 done: 1193 if (successp) 1194 *successp = success; 1195 return (result); 1196} 1197 1198u_int16_t 1199res_nametotype(const char *buf, int *successp) { 1200 unsigned long result; 1201 char *endptr; 1202 int success; 1203 1204 result = sym_ston(__p_type_syms, buf, &success); 1205 if (success) 1206 goto done; 1207 1208 if (strncasecmp(buf, "type", 4) != 0 || 1209 !isdigit((unsigned char)buf[4])) 1210 goto done; 1211 errno = 0; 1212 result = strtoul(buf + 4, &endptr, 10); 1213 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1214 success = 1; 1215 done: 1216 if (successp) 1217 *successp = success; 1218 return (result); 1219} 1220 1221/* 1222 * Weak aliases for applications that use certain private entry points, 1223 * and fail to include <resolv.h>. 1224 */ 1225#undef fp_resstat 1226__weak_reference(__fp_resstat, fp_resstat); 1227#undef p_fqnname 1228__weak_reference(__p_fqnname, p_fqnname); 1229#undef sym_ston 1230__weak_reference(__sym_ston, sym_ston); 1231#undef sym_ntos 1232__weak_reference(__sym_ntos, sym_ntos); 1233#undef sym_ntop 1234__weak_reference(__sym_ntop, sym_ntop); 1235#undef dn_count_labels 1236__weak_reference(__dn_count_labels, dn_count_labels); 1237#undef p_secstodate 1238__weak_reference(__p_secstodate, p_secstodate); 1239 1240/*! \file */ 1241