res_debug.c revision 331722
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: stable/11/lib/libc/resolv/res_debug.c 331722 2018-03-29 02:50:57Z eadler $"); 98 99#include "port_before.h" 100 101#include <sys/param.h> 102#include <sys/socket.h> 103 104#include <netinet/in.h> 105#include <arpa/inet.h> 106#include <arpa/nameser.h> 107 108#include <ctype.h> 109#include <errno.h> 110#include <math.h> 111#include <netdb.h> 112#include <resolv.h> 113#include <resolv_mt.h> 114#include <stdio.h> 115#include <stdlib.h> 116#include <string.h> 117#include <time.h> 118 119#include "port_after.h" 120 121#ifdef SPRINTF_CHAR 122# define SPRINTF(x) strlen(sprintf/**/x) 123#else 124# define SPRINTF(x) sprintf x 125#endif 126 127extern const char *_res_opcodes[]; 128extern const char *_res_sectioncodes[]; 129 130/*% 131 * Print the current options. 132 */ 133void 134fp_resstat(const res_state statp, FILE *file) { 135 u_long mask; 136 137 fprintf(file, ";; res options:"); 138 for (mask = 1; mask != 0U; mask <<= 1) 139 if (statp->options & mask) 140 fprintf(file, " %s", p_option(mask)); 141 putc('\n', file); 142} 143 144static void 145do_section(const res_state statp, 146 ns_msg *handle, ns_sect section, 147 int pflag, FILE *file) 148{ 149 int n, sflag, rrnum; 150 static int buflen = 2048; 151 char *buf; 152 ns_opcode opcode; 153 ns_rr rr; 154 155 /* 156 * Print answer records. 157 */ 158 sflag = (statp->pfcode & pflag); 159 if (statp->pfcode && !sflag) 160 return; 161 162 buf = malloc(buflen); 163 if (buf == NULL) { 164 fprintf(file, ";; memory allocation failure\n"); 165 return; 166 } 167 168 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode); 169 rrnum = 0; 170 for (;;) { 171 if (ns_parserr(handle, section, rrnum, &rr)) { 172 if (errno != ENODEV) 173 fprintf(file, ";; ns_parserr: %s\n", 174 strerror(errno)); 175 else if (rrnum > 0 && sflag != 0 && 176 (statp->pfcode & RES_PRF_HEAD1)) 177 putc('\n', file); 178 goto cleanup; 179 } 180 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1)) 181 fprintf(file, ";; %s SECTION:\n", 182 p_section(section, opcode)); 183 if (section == ns_s_qd) 184 fprintf(file, ";;\t%s, type = %s, class = %s\n", 185 ns_rr_name(rr), 186 p_type(ns_rr_type(rr)), 187 p_class(ns_rr_class(rr))); 188 else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) { 189 u_int16_t optcode, optlen, rdatalen = ns_rr_rdlen(rr); 190 u_int32_t ttl = ns_rr_ttl(rr); 191 192 fprintf(file, 193 "; EDNS: version: %u, udp=%u, flags=%04x\n", 194 (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff); 195 196 while (rdatalen >= 4) { 197 const u_char *cp = ns_rr_rdata(rr); 198 int i; 199 200 GETSHORT(optcode, cp); 201 GETSHORT(optlen, cp); 202 203 if (optcode == NS_OPT_NSID) { 204 fputs("; NSID: ", file); 205 if (optlen == 0) { 206 fputs("; NSID\n", file); 207 } else { 208 fputs("; NSID: ", file); 209 for (i = 0; i < optlen; i++) 210 fprintf(file, "%02x ", 211 cp[i]); 212 fputs(" (",file); 213 for (i = 0; i < optlen; i++) 214 fprintf(file, "%c", 215 isprint(cp[i])? 216 cp[i] : '.'); 217 fputs(")\n", file); 218 } 219 } else { 220 if (optlen == 0) { 221 fprintf(file, "; OPT=%u\n", 222 optcode); 223 } else { 224 fprintf(file, "; OPT=%u: ", 225 optcode); 226 for (i = 0; i < optlen; i++) 227 fprintf(file, "%02x ", 228 cp[i]); 229 fputs(" (",file); 230 for (i = 0; i < optlen; i++) 231 fprintf(file, "%c", 232 isprint(cp[i]) ? 233 cp[i] : '.'); 234 fputs(")\n", file); 235 } 236 } 237 rdatalen -= 4 + optlen; 238 } 239 } else { 240 n = ns_sprintrr(handle, &rr, NULL, NULL, 241 buf, buflen); 242 if (n < 0) { 243 if (errno == ENOSPC) { 244 free(buf); 245 buf = NULL; 246 if (buflen < 131072) 247 buf = malloc(buflen += 1024); 248 if (buf == NULL) { 249 fprintf(file, 250 ";; memory allocation failure\n"); 251 return; 252 } 253 continue; 254 } 255 fprintf(file, ";; ns_sprintrr: %s\n", 256 strerror(errno)); 257 goto cleanup; 258 } 259 fputs(buf, file); 260 fputc('\n', file); 261 } 262 rrnum++; 263 } 264 cleanup: 265 if (buf != NULL) 266 free(buf); 267} 268 269/*% 270 * Print the contents of a query. 271 * This is intended to be primarily a debugging routine. 272 */ 273void 274res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) { 275 ns_msg handle; 276 int qdcount, ancount, nscount, arcount; 277 u_int opcode, rcode, id; 278 279 if (ns_initparse(msg, len, &handle) < 0) { 280 fprintf(file, ";; ns_initparse: %s\n", strerror(errno)); 281 return; 282 } 283 opcode = ns_msg_getflag(handle, ns_f_opcode); 284 rcode = ns_msg_getflag(handle, ns_f_rcode); 285 id = ns_msg_id(handle); 286 qdcount = ns_msg_count(handle, ns_s_qd); 287 ancount = ns_msg_count(handle, ns_s_an); 288 nscount = ns_msg_count(handle, ns_s_ns); 289 arcount = ns_msg_count(handle, ns_s_ar); 290 291 /* 292 * Print header fields. 293 */ 294 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode) 295 fprintf(file, 296 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n", 297 _res_opcodes[opcode], p_rcode(rcode), id); 298 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX)) 299 putc(';', file); 300 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) { 301 fprintf(file, "; flags:"); 302 if (ns_msg_getflag(handle, ns_f_qr)) 303 fprintf(file, " qr"); 304 if (ns_msg_getflag(handle, ns_f_aa)) 305 fprintf(file, " aa"); 306 if (ns_msg_getflag(handle, ns_f_tc)) 307 fprintf(file, " tc"); 308 if (ns_msg_getflag(handle, ns_f_rd)) 309 fprintf(file, " rd"); 310 if (ns_msg_getflag(handle, ns_f_ra)) 311 fprintf(file, " ra"); 312 if (ns_msg_getflag(handle, ns_f_z)) 313 fprintf(file, " ??"); 314 if (ns_msg_getflag(handle, ns_f_ad)) 315 fprintf(file, " ad"); 316 if (ns_msg_getflag(handle, ns_f_cd)) 317 fprintf(file, " cd"); 318 } 319 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) { 320 fprintf(file, "; %s: %d", 321 p_section(ns_s_qd, opcode), qdcount); 322 fprintf(file, ", %s: %d", 323 p_section(ns_s_an, opcode), ancount); 324 fprintf(file, ", %s: %d", 325 p_section(ns_s_ns, opcode), nscount); 326 fprintf(file, ", %s: %d", 327 p_section(ns_s_ar, opcode), arcount); 328 } 329 if ((!statp->pfcode) || (statp->pfcode & 330 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) { 331 putc('\n',file); 332 } 333 /* 334 * Print the various sections. 335 */ 336 do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file); 337 do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file); 338 do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file); 339 do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file); 340 if (qdcount == 0 && ancount == 0 && 341 nscount == 0 && arcount == 0) 342 putc('\n', file); 343} 344 345const u_char * 346p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) { 347 char name[MAXDNAME]; 348 int n; 349 350 if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0) 351 return (NULL); 352 if (name[0] == '\0') 353 putc('.', file); 354 else 355 fputs(name, file); 356 return (cp + n); 357} 358 359const u_char * 360p_cdname(const u_char *cp, const u_char *msg, FILE *file) { 361 return (p_cdnname(cp, msg, PACKETSZ, file)); 362} 363 364/*% 365 * Return a fully-qualified domain name from a compressed name (with 366 length supplied). */ 367 368const u_char * 369p_fqnname(const u_char *cp, const u_char *msg, int msglen, char *name, 370 int namelen) 371{ 372 int n, newlen; 373 374 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0) 375 return (NULL); 376 newlen = strlen(name); 377 if (newlen == 0 || name[newlen - 1] != '.') { 378 if (newlen + 1 >= namelen) /*%< Lack space for final dot */ 379 return (NULL); 380 else 381 strcpy(name + newlen, "."); 382 } 383 return (cp + n); 384} 385 386/* XXX: the rest of these functions need to become length-limited, too. */ 387 388const u_char * 389p_fqname(const u_char *cp, const u_char *msg, FILE *file) { 390 char name[MAXDNAME]; 391 const u_char *n; 392 393 n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name); 394 if (n == NULL) 395 return (NULL); 396 fputs(name, file); 397 return (n); 398} 399 400/*% 401 * Names of RR classes and qclasses. Classes and qclasses are the same, except 402 * that C_ANY is a qclass but not a class. (You can ask for records of class 403 * C_ANY, but you can't have any records of that class in the database.) 404 */ 405const struct res_sym __p_class_syms[] = { 406 {C_IN, "IN", (char *)0}, 407 {C_CHAOS, "CH", (char *)0}, 408 {C_CHAOS, "CHAOS", (char *)0}, 409 {C_HS, "HS", (char *)0}, 410 {C_HS, "HESIOD", (char *)0}, 411 {C_ANY, "ANY", (char *)0}, 412 {C_NONE, "NONE", (char *)0}, 413 {C_IN, (char *)0, (char *)0} 414}; 415 416/*% 417 * Names of message sections. 418 */ 419static const struct res_sym __p_default_section_syms[] = { 420 {ns_s_qd, "QUERY", (char *)0}, 421 {ns_s_an, "ANSWER", (char *)0}, 422 {ns_s_ns, "AUTHORITY", (char *)0}, 423 {ns_s_ar, "ADDITIONAL", (char *)0}, 424 {0, (char *)0, (char *)0} 425}; 426 427static const struct res_sym __p_update_section_syms[] = { 428 {S_ZONE, "ZONE", (char *)0}, 429 {S_PREREQ, "PREREQUISITE", (char *)0}, 430 {S_UPDATE, "UPDATE", (char *)0}, 431 {S_ADDT, "ADDITIONAL", (char *)0}, 432 {0, (char *)0, (char *)0} 433}; 434 435const struct res_sym __p_key_syms[] = { 436 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"}, 437 {NS_ALG_DH, "DH", "Diffie Hellman"}, 438 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"}, 439 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"}, 440 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"}, 441 {0, NULL, NULL} 442}; 443 444const struct res_sym __p_cert_syms[] = { 445 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"}, 446 {cert_t_spki, "SPKI", "SPKI certificate"}, 447 {cert_t_pgp, "PGP", "PGP certificate"}, 448 {cert_t_url, "URL", "URL Private"}, 449 {cert_t_oid, "OID", "OID Private"}, 450 {0, NULL, NULL} 451}; 452 453/*% 454 * Names of RR types and qtypes. Types and qtypes are the same, except 455 * that T_ANY is a qtype but not a type. (You can ask for records of type 456 * T_ANY, but you can't have any records of that type in the database.) 457 */ 458const struct res_sym __p_type_syms[] = { 459 {ns_t_a, "A", "address"}, 460 {ns_t_ns, "NS", "name server"}, 461 {ns_t_md, "MD", "mail destination (deprecated)"}, 462 {ns_t_mf, "MF", "mail forwarder (deprecated)"}, 463 {ns_t_cname, "CNAME", "canonical name"}, 464 {ns_t_soa, "SOA", "start of authority"}, 465 {ns_t_mb, "MB", "mailbox"}, 466 {ns_t_mg, "MG", "mail group member"}, 467 {ns_t_mr, "MR", "mail rename"}, 468 {ns_t_null, "NULL", "null"}, 469 {ns_t_wks, "WKS", "well-known service (deprecated)"}, 470 {ns_t_ptr, "PTR", "domain name pointer"}, 471 {ns_t_hinfo, "HINFO", "host information"}, 472 {ns_t_minfo, "MINFO", "mailbox information"}, 473 {ns_t_mx, "MX", "mail exchanger"}, 474 {ns_t_txt, "TXT", "text"}, 475 {ns_t_rp, "RP", "responsible person"}, 476 {ns_t_afsdb, "AFSDB", "DCE or AFS server"}, 477 {ns_t_x25, "X25", "X25 address"}, 478 {ns_t_isdn, "ISDN", "ISDN address"}, 479 {ns_t_rt, "RT", "router"}, 480 {ns_t_nsap, "NSAP", "nsap address"}, 481 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"}, 482 {ns_t_sig, "SIG", "signature"}, 483 {ns_t_key, "KEY", "key"}, 484 {ns_t_px, "PX", "mapping information"}, 485 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"}, 486 {ns_t_aaaa, "AAAA", "IPv6 address"}, 487 {ns_t_loc, "LOC", "location"}, 488 {ns_t_nxt, "NXT", "next valid name (unimplemented)"}, 489 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"}, 490 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"}, 491 {ns_t_srv, "SRV", "server selection"}, 492 {ns_t_atma, "ATMA", "ATM address (unimplemented)"}, 493 {ns_t_naptr, "NAPTR", "naptr"}, 494 {ns_t_kx, "KX", "key exchange"}, 495 {ns_t_cert, "CERT", "certificate"}, 496 {ns_t_a6, "A", "IPv6 address (experminental)"}, 497 {ns_t_dname, "DNAME", "non-terminal redirection"}, 498 {ns_t_opt, "OPT", "opt"}, 499 {ns_t_apl, "apl", "apl"}, 500 {ns_t_ds, "DS", "delegation signer"}, 501 {ns_t_sshfp, "SSFP", "SSH fingerprint"}, 502 {ns_t_ipseckey, "IPSECKEY", "IPSEC key"}, 503 {ns_t_rrsig, "RRSIG", "rrsig"}, 504 {ns_t_nsec, "NSEC", "nsec"}, 505 {ns_t_dnskey, "DNSKEY", "DNS key"}, 506 {ns_t_dhcid, "DHCID", "dynamic host configuration identifier"}, 507 {ns_t_nsec3, "NSEC3", "nsec3"}, 508 {ns_t_nsec3param, "NSEC3PARAM", "NSEC3 parameters"}, 509 {ns_t_hip, "HIP", "host identity protocol"}, 510 {ns_t_spf, "SPF", "sender policy framework"}, 511 {ns_t_tkey, "TKEY", "tkey"}, 512 {ns_t_tsig, "TSIG", "transaction signature"}, 513 {ns_t_ixfr, "IXFR", "incremental zone transfer"}, 514 {ns_t_axfr, "AXFR", "zone transfer"}, 515 {ns_t_zxfr, "ZXFR", "compressed zone transfer"}, 516 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"}, 517 {ns_t_maila, "MAILA", "mail agent (deprecated)"}, 518 {ns_t_naptr, "NAPTR", "URN Naming Authority"}, 519 {ns_t_kx, "KX", "Key Exchange"}, 520 {ns_t_cert, "CERT", "Certificate"}, 521 {ns_t_a6, "A6", "IPv6 Address"}, 522 {ns_t_dname, "DNAME", "dname"}, 523 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"}, 524 {ns_t_opt, "OPT", "EDNS Options"}, 525 {ns_t_any, "ANY", "\"any\""}, 526 {ns_t_dlv, "DLV", "DNSSEC look-aside validation"}, 527 {0, NULL, NULL} 528}; 529 530/*% 531 * Names of DNS rcodes. 532 */ 533const struct res_sym __p_rcode_syms[] = { 534 {ns_r_noerror, "NOERROR", "no error"}, 535 {ns_r_formerr, "FORMERR", "format error"}, 536 {ns_r_servfail, "SERVFAIL", "server failed"}, 537 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"}, 538 {ns_r_notimpl, "NOTIMP", "not implemented"}, 539 {ns_r_refused, "REFUSED", "refused"}, 540 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"}, 541 {ns_r_yxrrset, "YXRRSET", "rrset exists"}, 542 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"}, 543 {ns_r_notauth, "NOTAUTH", "not authoritative"}, 544 {ns_r_notzone, "NOTZONE", "Not in zone"}, 545 {ns_r_max, "", ""}, 546 {ns_r_badsig, "BADSIG", "bad signature"}, 547 {ns_r_badkey, "BADKEY", "bad key"}, 548 {ns_r_badtime, "BADTIME", "bad time"}, 549 {0, NULL, NULL} 550}; 551 552int 553sym_ston(const struct res_sym *syms, const char *name, int *success) { 554 for ((void)NULL; syms->name != 0; syms++) { 555 if (strcasecmp (name, syms->name) == 0) { 556 if (success) 557 *success = 1; 558 return (syms->number); 559 } 560 } 561 if (success) 562 *success = 0; 563 return (syms->number); /*%< The default value. */ 564} 565 566const char * 567sym_ntos(const struct res_sym *syms, int number, int *success) { 568 char *unname = sym_ntos_unname; 569 570 for ((void)NULL; syms->name != 0; syms++) { 571 if (number == syms->number) { 572 if (success) 573 *success = 1; 574 return (syms->name); 575 } 576 } 577 578 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 579 if (success) 580 *success = 0; 581 return (unname); 582} 583 584const char * 585sym_ntop(const struct res_sym *syms, int number, int *success) { 586 char *unname = sym_ntop_unname; 587 588 for ((void)NULL; syms->name != 0; syms++) { 589 if (number == syms->number) { 590 if (success) 591 *success = 1; 592 return (syms->humanname); 593 } 594 } 595 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 596 if (success) 597 *success = 0; 598 return (unname); 599} 600 601/*% 602 * Return a string for the type. 603 */ 604const char * 605p_type(int type) { 606 int success; 607 const char *result; 608 static char typebuf[20]; 609 610 result = sym_ntos(__p_type_syms, type, &success); 611 if (success) 612 return (result); 613 if (type < 0 || type > 0xffff) 614 return ("BADTYPE"); 615 sprintf(typebuf, "TYPE%d", type); 616 return (typebuf); 617} 618 619/*% 620 * Return a string for the type. 621 */ 622const char * 623p_section(int section, int opcode) { 624 const struct res_sym *symbols; 625 626 switch (opcode) { 627 case ns_o_update: 628 symbols = __p_update_section_syms; 629 break; 630 default: 631 symbols = __p_default_section_syms; 632 break; 633 } 634 return (sym_ntos(symbols, section, (int *)0)); 635} 636 637/*% 638 * Return a mnemonic for class. 639 */ 640const char * 641p_class(int class) { 642 int success; 643 const char *result; 644 static char classbuf[20]; 645 646 result = sym_ntos(__p_class_syms, class, &success); 647 if (success) 648 return (result); 649 if (class < 0 || class > 0xffff) 650 return ("BADCLASS"); 651 sprintf(classbuf, "CLASS%d", class); 652 return (classbuf); 653} 654 655/*% 656 * Return a mnemonic for an option 657 */ 658const char * 659p_option(u_long option) { 660 char *nbuf = p_option_nbuf; 661 662 switch (option) { 663 case RES_INIT: return "init"; 664 case RES_DEBUG: return "debug"; 665 case RES_AAONLY: return "aaonly(unimpl)"; 666 case RES_USEVC: return "usevc"; 667 case RES_PRIMARY: return "primry(unimpl)"; 668 case RES_IGNTC: return "igntc"; 669 case RES_RECURSE: return "recurs"; 670 case RES_DEFNAMES: return "defnam"; 671 case RES_STAYOPEN: return "styopn"; 672 case RES_DNSRCH: return "dnsrch"; 673 case RES_INSECURE1: return "insecure1"; 674 case RES_INSECURE2: return "insecure2"; 675 case RES_NOALIASES: return "noaliases"; 676 case RES_USE_INET6: return "inet6"; 677#ifdef RES_USE_EDNS0 /*%< KAME extension */ 678 case RES_USE_EDNS0: return "edns0"; 679 case RES_NSID: return "nsid"; 680#endif 681#ifdef RES_USE_DNAME 682 case RES_USE_DNAME: return "dname"; 683#endif 684#ifdef RES_USE_DNSSEC 685 case RES_USE_DNSSEC: return "dnssec"; 686#endif 687#ifdef RES_NOTLDQUERY 688 case RES_NOTLDQUERY: return "no-tld-query"; 689#endif 690#ifdef RES_NO_NIBBLE2 691 case RES_NO_NIBBLE2: return "no-nibble2"; 692#endif 693 /* XXX nonreentrant */ 694 default: sprintf(nbuf, "?0x%lx?", (u_long)option); 695 return (nbuf); 696 } 697} 698 699/*% 700 * Return a mnemonic for a time to live. 701 */ 702const char * 703p_time(u_int32_t value) { 704 char *nbuf = p_time_nbuf; 705 706 if (ns_format_ttl(value, nbuf, sizeof nbuf) < 0) 707 sprintf(nbuf, "%u", value); 708 return (nbuf); 709} 710 711/*% 712 * Return a string for the rcode. 713 */ 714const char * 715p_rcode(int rcode) { 716 return (sym_ntos(__p_rcode_syms, rcode, (int *)0)); 717} 718 719/*% 720 * Return a string for a res_sockaddr_union. 721 */ 722const char * 723p_sockun(union res_sockaddr_union u, char *buf, size_t size) { 724 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"]; 725 726 switch (u.sin.sin_family) { 727 case AF_INET: 728 inet_ntop(AF_INET, &u.sin.sin_addr, ret, sizeof ret); 729 break; 730#ifdef HAS_INET6_STRUCTS 731 case AF_INET6: 732 inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret); 733 break; 734#endif 735 default: 736 sprintf(ret, "[af%d]", u.sin.sin_family); 737 break; 738 } 739 if (size > 0U) { 740 strncpy(buf, ret, size - 1); 741 buf[size - 1] = '0'; 742 } 743 return (buf); 744} 745 746/*% 747 * routines to convert between on-the-wire RR format and zone file format. 748 * Does not contain conversion to/from decimal degrees; divide or multiply 749 * by 60*60*1000 for that. 750 */ 751 752static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000, 753 1000000,10000000,100000000,1000000000}; 754 755/*% takes an XeY precision/size value, returns a string representation. */ 756static const char * 757precsize_ntoa(u_int8_t prec) 758{ 759 char *retbuf = precsize_ntoa_retbuf; 760 unsigned long val; 761 int mantissa, exponent; 762 763 mantissa = (int)((prec >> 4) & 0x0f) % 10; 764 exponent = (int)((prec >> 0) & 0x0f) % 10; 765 766 val = mantissa * poweroften[exponent]; 767 768 (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100); 769 return (retbuf); 770} 771 772/*% converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */ 773static u_int8_t 774precsize_aton(const char **strptr) { 775 unsigned int mval = 0, cmval = 0; 776 u_int8_t retval = 0; 777 const char *cp; 778 int exponent; 779 int mantissa; 780 781 cp = *strptr; 782 783 while (isdigit((unsigned char)*cp)) 784 mval = mval * 10 + (*cp++ - '0'); 785 786 if (*cp == '.') { /*%< centimeters */ 787 cp++; 788 if (isdigit((unsigned char)*cp)) { 789 cmval = (*cp++ - '0') * 10; 790 if (isdigit((unsigned char)*cp)) { 791 cmval += (*cp++ - '0'); 792 } 793 } 794 } 795 cmval = (mval * 100) + cmval; 796 797 for (exponent = 0; exponent < 9; exponent++) 798 if (cmval < poweroften[exponent+1]) 799 break; 800 801 mantissa = cmval / poweroften[exponent]; 802 if (mantissa > 9) 803 mantissa = 9; 804 805 retval = (mantissa << 4) | exponent; 806 807 *strptr = cp; 808 809 return (retval); 810} 811 812/*% converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */ 813static u_int32_t 814latlon2ul(const char **latlonstrptr, int *which) { 815 const char *cp; 816 u_int32_t retval; 817 int deg = 0, min = 0, secs = 0, secsfrac = 0; 818 819 cp = *latlonstrptr; 820 821 while (isdigit((unsigned char)*cp)) 822 deg = deg * 10 + (*cp++ - '0'); 823 824 while (isspace((unsigned char)*cp)) 825 cp++; 826 827 if (!(isdigit((unsigned char)*cp))) 828 goto fndhemi; 829 830 while (isdigit((unsigned char)*cp)) 831 min = min * 10 + (*cp++ - '0'); 832 833 while (isspace((unsigned char)*cp)) 834 cp++; 835 836 if (!(isdigit((unsigned char)*cp))) 837 goto fndhemi; 838 839 while (isdigit((unsigned char)*cp)) 840 secs = secs * 10 + (*cp++ - '0'); 841 842 if (*cp == '.') { /*%< decimal seconds */ 843 cp++; 844 if (isdigit((unsigned char)*cp)) { 845 secsfrac = (*cp++ - '0') * 100; 846 if (isdigit((unsigned char)*cp)) { 847 secsfrac += (*cp++ - '0') * 10; 848 if (isdigit((unsigned char)*cp)) { 849 secsfrac += (*cp++ - '0'); 850 } 851 } 852 } 853 } 854 855 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 856 cp++; 857 858 while (isspace((unsigned char)*cp)) 859 cp++; 860 861 fndhemi: 862 switch (*cp) { 863 case 'N': case 'n': 864 case 'E': case 'e': 865 retval = ((unsigned)1<<31) 866 + (((((deg * 60) + min) * 60) + secs) * 1000) 867 + secsfrac; 868 break; 869 case 'S': case 's': 870 case 'W': case 'w': 871 retval = ((unsigned)1<<31) 872 - (((((deg * 60) + min) * 60) + secs) * 1000) 873 - secsfrac; 874 break; 875 default: 876 retval = 0; /*%< invalid value -- indicates error */ 877 break; 878 } 879 880 switch (*cp) { 881 case 'N': case 'n': 882 case 'S': case 's': 883 *which = 1; /*%< latitude */ 884 break; 885 case 'E': case 'e': 886 case 'W': case 'w': 887 *which = 2; /*%< longitude */ 888 break; 889 default: 890 *which = 0; /*%< error */ 891 break; 892 } 893 894 cp++; /*%< skip the hemisphere */ 895 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 896 cp++; 897 898 while (isspace((unsigned char)*cp)) /*%< move to next field */ 899 cp++; 900 901 *latlonstrptr = cp; 902 903 return (retval); 904} 905 906/*% 907 * converts a zone file representation in a string to an RDATA on-the-wire 908 * representation. */ 909int 910loc_aton(const char *ascii, u_char *binary) 911{ 912 const char *cp, *maxcp; 913 u_char *bcp; 914 915 u_int32_t latit = 0, longit = 0, alt = 0; 916 u_int32_t lltemp1 = 0, lltemp2 = 0; 917 int altmeters = 0, altfrac = 0, altsign = 1; 918 u_int8_t hp = 0x16; /*%< default = 1e6 cm = 10000.00m = 10km */ 919 u_int8_t vp = 0x13; /*%< default = 1e3 cm = 10.00m */ 920 u_int8_t siz = 0x12; /*%< default = 1e2 cm = 1.00m */ 921 int which1 = 0, which2 = 0; 922 923 cp = ascii; 924 maxcp = cp + strlen(ascii); 925 926 lltemp1 = latlon2ul(&cp, &which1); 927 928 lltemp2 = latlon2ul(&cp, &which2); 929 930 switch (which1 + which2) { 931 case 3: /*%< 1 + 2, the only valid combination */ 932 if ((which1 == 1) && (which2 == 2)) { /*%< normal case */ 933 latit = lltemp1; 934 longit = lltemp2; 935 } else if ((which1 == 2) && (which2 == 1)) { /*%< reversed */ 936 longit = lltemp1; 937 latit = lltemp2; 938 } else { /*%< some kind of brokenness */ 939 return (0); 940 } 941 break; 942 default: /*%< we didn't get one of each */ 943 return (0); 944 } 945 946 /* altitude */ 947 if (*cp == '-') { 948 altsign = -1; 949 cp++; 950 } 951 952 if (*cp == '+') 953 cp++; 954 955 while (isdigit((unsigned char)*cp)) 956 altmeters = altmeters * 10 + (*cp++ - '0'); 957 958 if (*cp == '.') { /*%< decimal meters */ 959 cp++; 960 if (isdigit((unsigned char)*cp)) { 961 altfrac = (*cp++ - '0') * 10; 962 if (isdigit((unsigned char)*cp)) { 963 altfrac += (*cp++ - '0'); 964 } 965 } 966 } 967 968 alt = (10000000 + (altsign * (altmeters * 100 + altfrac))); 969 970 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 971 cp++; 972 973 while (isspace((unsigned char)*cp) && (cp < maxcp)) 974 cp++; 975 976 if (cp >= maxcp) 977 goto defaults; 978 979 siz = precsize_aton(&cp); 980 981 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 982 cp++; 983 984 while (isspace((unsigned char)*cp) && (cp < maxcp)) 985 cp++; 986 987 if (cp >= maxcp) 988 goto defaults; 989 990 hp = precsize_aton(&cp); 991 992 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 993 cp++; 994 995 while (isspace((unsigned char)*cp) && (cp < maxcp)) 996 cp++; 997 998 if (cp >= maxcp) 999 goto defaults; 1000 1001 vp = precsize_aton(&cp); 1002 1003 defaults: 1004 1005 bcp = binary; 1006 *bcp++ = (u_int8_t) 0; /*%< version byte */ 1007 *bcp++ = siz; 1008 *bcp++ = hp; 1009 *bcp++ = vp; 1010 PUTLONG(latit,bcp); 1011 PUTLONG(longit,bcp); 1012 PUTLONG(alt,bcp); 1013 1014 return (16); /*%< size of RR in octets */ 1015} 1016 1017/*% takes an on-the-wire LOC RR and formats it in a human readable format. */ 1018const char * 1019loc_ntoa(const u_char *binary, char *ascii) 1020{ 1021 static const char *error = "?"; 1022 static char tmpbuf[sizeof 1023"1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"]; 1024 const u_char *cp = binary; 1025 1026 int latdeg, latmin, latsec, latsecfrac; 1027 int longdeg, longmin, longsec, longsecfrac; 1028 char northsouth, eastwest; 1029 const char *altsign; 1030 int altmeters, altfrac; 1031 1032 const u_int32_t referencealt = 100000 * 100; 1033 1034 int32_t latval, longval, altval; 1035 u_int32_t templ; 1036 u_int8_t sizeval, hpval, vpval, versionval; 1037 1038 char *sizestr, *hpstr, *vpstr; 1039 1040 versionval = *cp++; 1041 1042 if (ascii == NULL) 1043 ascii = tmpbuf; 1044 1045 if (versionval) { 1046 (void) sprintf(ascii, "; error: unknown LOC RR version"); 1047 return (ascii); 1048 } 1049 1050 sizeval = *cp++; 1051 1052 hpval = *cp++; 1053 vpval = *cp++; 1054 1055 GETLONG(templ, cp); 1056 latval = (templ - ((unsigned)1<<31)); 1057 1058 GETLONG(templ, cp); 1059 longval = (templ - ((unsigned)1<<31)); 1060 1061 GETLONG(templ, cp); 1062 if (templ < referencealt) { /*%< below WGS 84 spheroid */ 1063 altval = referencealt - templ; 1064 altsign = "-"; 1065 } else { 1066 altval = templ - referencealt; 1067 altsign = ""; 1068 } 1069 1070 if (latval < 0) { 1071 northsouth = 'S'; 1072 latval = -latval; 1073 } else 1074 northsouth = 'N'; 1075 1076 latsecfrac = latval % 1000; 1077 latval = latval / 1000; 1078 latsec = latval % 60; 1079 latval = latval / 60; 1080 latmin = latval % 60; 1081 latval = latval / 60; 1082 latdeg = latval; 1083 1084 if (longval < 0) { 1085 eastwest = 'W'; 1086 longval = -longval; 1087 } else 1088 eastwest = 'E'; 1089 1090 longsecfrac = longval % 1000; 1091 longval = longval / 1000; 1092 longsec = longval % 60; 1093 longval = longval / 60; 1094 longmin = longval % 60; 1095 longval = longval / 60; 1096 longdeg = longval; 1097 1098 altfrac = altval % 100; 1099 altmeters = (altval / 100); 1100 1101 sizestr = strdup(precsize_ntoa(sizeval)); 1102 hpstr = strdup(precsize_ntoa(hpval)); 1103 vpstr = strdup(precsize_ntoa(vpval)); 1104 1105 sprintf(ascii, 1106 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm", 1107 latdeg, latmin, latsec, latsecfrac, northsouth, 1108 longdeg, longmin, longsec, longsecfrac, eastwest, 1109 altsign, altmeters, altfrac, 1110 (sizestr != NULL) ? sizestr : error, 1111 (hpstr != NULL) ? hpstr : error, 1112 (vpstr != NULL) ? vpstr : error); 1113 1114 if (sizestr != NULL) 1115 free(sizestr); 1116 if (hpstr != NULL) 1117 free(hpstr); 1118 if (vpstr != NULL) 1119 free(vpstr); 1120 1121 return (ascii); 1122} 1123 1124 1125/*% Return the number of DNS hierarchy levels in the name. */ 1126int 1127dn_count_labels(const char *name) { 1128 int i, len, count; 1129 1130 len = strlen(name); 1131 for (i = 0, count = 0; i < len; i++) { 1132 /* XXX need to check for \. or use named's nlabels(). */ 1133 if (name[i] == '.') 1134 count++; 1135 } 1136 1137 /* don't count initial wildcard */ 1138 if (name[0] == '*') 1139 if (count) 1140 count--; 1141 1142 /* don't count the null label for root. */ 1143 /* if terminating '.' not found, must adjust */ 1144 /* count to include last label */ 1145 if (len > 0 && name[len-1] != '.') 1146 count++; 1147 return (count); 1148} 1149 1150/*% 1151 * Make dates expressed in seconds-since-Jan-1-1970 easy to read. 1152 * SIG records are required to be printed like this, by the Secure DNS RFC. 1153 */ 1154char * 1155p_secstodate (u_long secs) { 1156 char *output = p_secstodate_output; 1157 time_t clock = secs; 1158 struct tm *time; 1159#ifdef HAVE_TIME_R 1160 struct tm res; 1161 1162 time = gmtime_r(&clock, &res); 1163#else 1164 time = gmtime(&clock); 1165#endif 1166 time->tm_year += 1900; 1167 time->tm_mon += 1; 1168 sprintf(output, "%04d%02d%02d%02d%02d%02d", 1169 time->tm_year, time->tm_mon, time->tm_mday, 1170 time->tm_hour, time->tm_min, time->tm_sec); 1171 return (output); 1172} 1173 1174u_int16_t 1175res_nametoclass(const char *buf, int *successp) { 1176 unsigned long result; 1177 char *endptr; 1178 int success; 1179 1180 result = sym_ston(__p_class_syms, buf, &success); 1181 if (success) 1182 goto done; 1183 1184 if (strncasecmp(buf, "CLASS", 5) != 0 || 1185 !isdigit((unsigned char)buf[5])) 1186 goto done; 1187 errno = 0; 1188 result = strtoul(buf + 5, &endptr, 10); 1189 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1190 success = 1; 1191 done: 1192 if (successp) 1193 *successp = success; 1194 return (result); 1195} 1196 1197u_int16_t 1198res_nametotype(const char *buf, int *successp) { 1199 unsigned long result; 1200 char *endptr; 1201 int success; 1202 1203 result = sym_ston(__p_type_syms, buf, &success); 1204 if (success) 1205 goto done; 1206 1207 if (strncasecmp(buf, "type", 4) != 0 || 1208 !isdigit((unsigned char)buf[4])) 1209 goto done; 1210 errno = 0; 1211 result = strtoul(buf + 4, &endptr, 10); 1212 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1213 success = 1; 1214 done: 1215 if (successp) 1216 *successp = success; 1217 return (result); 1218} 1219 1220/* 1221 * Weak aliases for applications that use certain private entry points, 1222 * and fail to include <resolv.h>. 1223 */ 1224#undef fp_resstat 1225__weak_reference(__fp_resstat, fp_resstat); 1226#undef p_fqnname 1227__weak_reference(__p_fqnname, p_fqnname); 1228#undef sym_ston 1229__weak_reference(__sym_ston, sym_ston); 1230#undef sym_ntos 1231__weak_reference(__sym_ntos, sym_ntos); 1232#undef sym_ntop 1233__weak_reference(__sym_ntop, sym_ntop); 1234#undef dn_count_labels 1235__weak_reference(__dn_count_labels, dn_count_labels); 1236#undef p_secstodate 1237__weak_reference(__p_secstodate, p_secstodate); 1238 1239/*! \file */ 1240