res_debug.c revision 170244
1/* 2 * Copyright (c) 1985 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30/* 31 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 32 * 33 * Permission to use, copy, modify, and distribute this software for any 34 * purpose with or without fee is hereby granted, provided that the above 35 * copyright notice and this permission notice appear in all copies, and that 36 * the name of Digital Equipment Corporation not be used in advertising or 37 * publicity pertaining to distribution of the document or software without 38 * specific, written prior permission. 39 * 40 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 41 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 42 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 43 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 44 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 45 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 46 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 47 * SOFTWARE. 48 */ 49 50/* 51 * Portions Copyright (c) 1995 by International Business Machines, Inc. 52 * 53 * International Business Machines, Inc. (hereinafter called IBM) grants 54 * permission under its copyrights to use, copy, modify, and distribute this 55 * Software with or without fee, provided that the above copyright notice and 56 * all paragraphs of this notice appear in all copies, and that the name of IBM 57 * not be used in connection with the marketing of any product incorporating 58 * the Software or modifications thereof, without specific, written prior 59 * permission. 60 * 61 * To the extent it has a right to do so, IBM grants an immunity from suit 62 * under its patents, if any, for the use, sale or manufacture of products to 63 * the extent that such products are used for performing Domain Name System 64 * dynamic updates in TCP/IP networks by means of the Software. No immunity is 65 * granted for any product per se or for any other function of any product. 66 * 67 * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES, 68 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 69 * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL, 70 * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING 71 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN 72 * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES. 73 */ 74 75/* 76 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 77 * Portions Copyright (c) 1996-1999 by Internet Software Consortium. 78 * 79 * Permission to use, copy, modify, and distribute this software for any 80 * purpose with or without fee is hereby granted, provided that the above 81 * copyright notice and this permission notice appear in all copies. 82 * 83 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 84 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 85 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 86 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 87 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 88 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 89 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 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 1.10.18.5 2005/07/28 07:38:11 marka Exp $"; 95#endif /* LIBC_SCCS and not lint */ 96#include <sys/cdefs.h> 97__FBSDID("$FreeBSD: head/lib/libc/resolv/res_debug.c 170244 2007-06-03 17:20:27Z ume $"); 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_int32_t ttl = ns_rr_ttl(rr); 191 fprintf(file, 192 "; EDNS: version: %u, udp=%u, flags=%04x\n", 193 (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff); 194 } else { 195 n = ns_sprintrr(handle, &rr, NULL, NULL, 196 buf, buflen); 197 if (n < 0) { 198 if (errno == ENOSPC) { 199 free(buf); 200 buf = NULL; 201 if (buflen < 131072) 202 buf = malloc(buflen += 1024); 203 if (buf == NULL) { 204 fprintf(file, 205 ";; memory allocation failure\n"); 206 return; 207 } 208 continue; 209 } 210 fprintf(file, ";; ns_sprintrr: %s\n", 211 strerror(errno)); 212 goto cleanup; 213 } 214 fputs(buf, file); 215 fputc('\n', file); 216 } 217 rrnum++; 218 } 219 cleanup: 220 if (buf != NULL) 221 free(buf); 222} 223 224/*% 225 * Print the contents of a query. 226 * This is intended to be primarily a debugging routine. 227 */ 228void 229res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) { 230 ns_msg handle; 231 int qdcount, ancount, nscount, arcount; 232 u_int opcode, rcode, id; 233 234 if (ns_initparse(msg, len, &handle) < 0) { 235 fprintf(file, ";; ns_initparse: %s\n", strerror(errno)); 236 return; 237 } 238 opcode = ns_msg_getflag(handle, ns_f_opcode); 239 rcode = ns_msg_getflag(handle, ns_f_rcode); 240 id = ns_msg_id(handle); 241 qdcount = ns_msg_count(handle, ns_s_qd); 242 ancount = ns_msg_count(handle, ns_s_an); 243 nscount = ns_msg_count(handle, ns_s_ns); 244 arcount = ns_msg_count(handle, ns_s_ar); 245 246 /* 247 * Print header fields. 248 */ 249 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode) 250 fprintf(file, 251 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n", 252 _res_opcodes[opcode], p_rcode(rcode), id); 253 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX)) 254 putc(';', file); 255 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) { 256 fprintf(file, "; flags:"); 257 if (ns_msg_getflag(handle, ns_f_qr)) 258 fprintf(file, " qr"); 259 if (ns_msg_getflag(handle, ns_f_aa)) 260 fprintf(file, " aa"); 261 if (ns_msg_getflag(handle, ns_f_tc)) 262 fprintf(file, " tc"); 263 if (ns_msg_getflag(handle, ns_f_rd)) 264 fprintf(file, " rd"); 265 if (ns_msg_getflag(handle, ns_f_ra)) 266 fprintf(file, " ra"); 267 if (ns_msg_getflag(handle, ns_f_z)) 268 fprintf(file, " ??"); 269 if (ns_msg_getflag(handle, ns_f_ad)) 270 fprintf(file, " ad"); 271 if (ns_msg_getflag(handle, ns_f_cd)) 272 fprintf(file, " cd"); 273 } 274 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) { 275 fprintf(file, "; %s: %d", 276 p_section(ns_s_qd, opcode), qdcount); 277 fprintf(file, ", %s: %d", 278 p_section(ns_s_an, opcode), ancount); 279 fprintf(file, ", %s: %d", 280 p_section(ns_s_ns, opcode), nscount); 281 fprintf(file, ", %s: %d", 282 p_section(ns_s_ar, opcode), arcount); 283 } 284 if ((!statp->pfcode) || (statp->pfcode & 285 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) { 286 putc('\n',file); 287 } 288 /* 289 * Print the various sections. 290 */ 291 do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file); 292 do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file); 293 do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file); 294 do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file); 295 if (qdcount == 0 && ancount == 0 && 296 nscount == 0 && arcount == 0) 297 putc('\n', file); 298} 299 300const u_char * 301p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) { 302 char name[MAXDNAME]; 303 int n; 304 305 if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0) 306 return (NULL); 307 if (name[0] == '\0') 308 putc('.', file); 309 else 310 fputs(name, file); 311 return (cp + n); 312} 313 314const u_char * 315p_cdname(const u_char *cp, const u_char *msg, FILE *file) { 316 return (p_cdnname(cp, msg, PACKETSZ, file)); 317} 318 319/*% 320 * Return a fully-qualified domain name from a compressed name (with 321 length supplied). */ 322 323const u_char * 324p_fqnname(cp, msg, msglen, name, namelen) 325 const u_char *cp, *msg; 326 int msglen; 327 char *name; 328 int namelen; 329{ 330 int n, newlen; 331 332 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0) 333 return (NULL); 334 newlen = strlen(name); 335 if (newlen == 0 || name[newlen - 1] != '.') { 336 if (newlen + 1 >= namelen) /*%< Lack space for final dot */ 337 return (NULL); 338 else 339 strcpy(name + newlen, "."); 340 } 341 return (cp + n); 342} 343 344/* XXX: the rest of these functions need to become length-limited, too. */ 345 346const u_char * 347p_fqname(const u_char *cp, const u_char *msg, FILE *file) { 348 char name[MAXDNAME]; 349 const u_char *n; 350 351 n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name); 352 if (n == NULL) 353 return (NULL); 354 fputs(name, file); 355 return (n); 356} 357 358/*% 359 * Names of RR classes and qclasses. Classes and qclasses are the same, except 360 * that C_ANY is a qclass but not a class. (You can ask for records of class 361 * C_ANY, but you can't have any records of that class in the database.) 362 */ 363const struct res_sym __p_class_syms[] = { 364 {C_IN, "IN", (char *)0}, 365 {C_CHAOS, "CH", (char *)0}, 366 {C_CHAOS, "CHAOS", (char *)0}, 367 {C_HS, "HS", (char *)0}, 368 {C_HS, "HESIOD", (char *)0}, 369 {C_ANY, "ANY", (char *)0}, 370 {C_NONE, "NONE", (char *)0}, 371 {C_IN, (char *)0, (char *)0} 372}; 373 374/*% 375 * Names of message sections. 376 */ 377static const struct res_sym __p_default_section_syms[] = { 378 {ns_s_qd, "QUERY", (char *)0}, 379 {ns_s_an, "ANSWER", (char *)0}, 380 {ns_s_ns, "AUTHORITY", (char *)0}, 381 {ns_s_ar, "ADDITIONAL", (char *)0}, 382 {0, (char *)0, (char *)0} 383}; 384 385static const struct res_sym __p_update_section_syms[] = { 386 {S_ZONE, "ZONE", (char *)0}, 387 {S_PREREQ, "PREREQUISITE", (char *)0}, 388 {S_UPDATE, "UPDATE", (char *)0}, 389 {S_ADDT, "ADDITIONAL", (char *)0}, 390 {0, (char *)0, (char *)0} 391}; 392 393const struct res_sym __p_key_syms[] = { 394 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"}, 395 {NS_ALG_DH, "DH", "Diffie Hellman"}, 396 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"}, 397 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"}, 398 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"}, 399 {0, NULL, NULL} 400}; 401 402const struct res_sym __p_cert_syms[] = { 403 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"}, 404 {cert_t_spki, "SPKI", "SPKI certificate"}, 405 {cert_t_pgp, "PGP", "PGP certificate"}, 406 {cert_t_url, "URL", "URL Private"}, 407 {cert_t_oid, "OID", "OID Private"}, 408 {0, NULL, NULL} 409}; 410 411/*% 412 * Names of RR types and qtypes. Types and qtypes are the same, except 413 * that T_ANY is a qtype but not a type. (You can ask for records of type 414 * T_ANY, but you can't have any records of that type in the database.) 415 */ 416const struct res_sym __p_type_syms[] = { 417 {ns_t_a, "A", "address"}, 418 {ns_t_ns, "NS", "name server"}, 419 {ns_t_md, "MD", "mail destination (deprecated)"}, 420 {ns_t_mf, "MF", "mail forwarder (deprecated)"}, 421 {ns_t_cname, "CNAME", "canonical name"}, 422 {ns_t_soa, "SOA", "start of authority"}, 423 {ns_t_mb, "MB", "mailbox"}, 424 {ns_t_mg, "MG", "mail group member"}, 425 {ns_t_mr, "MR", "mail rename"}, 426 {ns_t_null, "NULL", "null"}, 427 {ns_t_wks, "WKS", "well-known service (deprecated)"}, 428 {ns_t_ptr, "PTR", "domain name pointer"}, 429 {ns_t_hinfo, "HINFO", "host information"}, 430 {ns_t_minfo, "MINFO", "mailbox information"}, 431 {ns_t_mx, "MX", "mail exchanger"}, 432 {ns_t_txt, "TXT", "text"}, 433 {ns_t_rp, "RP", "responsible person"}, 434 {ns_t_afsdb, "AFSDB", "DCE or AFS server"}, 435 {ns_t_x25, "X25", "X25 address"}, 436 {ns_t_isdn, "ISDN", "ISDN address"}, 437 {ns_t_rt, "RT", "router"}, 438 {ns_t_nsap, "NSAP", "nsap address"}, 439 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"}, 440 {ns_t_sig, "SIG", "signature"}, 441 {ns_t_key, "KEY", "key"}, 442 {ns_t_px, "PX", "mapping information"}, 443 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"}, 444 {ns_t_aaaa, "AAAA", "IPv6 address"}, 445 {ns_t_loc, "LOC", "location"}, 446 {ns_t_nxt, "NXT", "next valid name (unimplemented)"}, 447 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"}, 448 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"}, 449 {ns_t_srv, "SRV", "server selection"}, 450 {ns_t_atma, "ATMA", "ATM address (unimplemented)"}, 451 {ns_t_tkey, "TKEY", "tkey"}, 452 {ns_t_tsig, "TSIG", "transaction signature"}, 453 {ns_t_ixfr, "IXFR", "incremental zone transfer"}, 454 {ns_t_axfr, "AXFR", "zone transfer"}, 455 {ns_t_zxfr, "ZXFR", "compressed zone transfer"}, 456 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"}, 457 {ns_t_maila, "MAILA", "mail agent (deprecated)"}, 458 {ns_t_naptr, "NAPTR", "URN Naming Authority"}, 459 {ns_t_kx, "KX", "Key Exchange"}, 460 {ns_t_cert, "CERT", "Certificate"}, 461 {ns_t_a6, "A6", "IPv6 Address"}, 462 {ns_t_dname, "DNAME", "dname"}, 463 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"}, 464 {ns_t_opt, "OPT", "EDNS Options"}, 465 {ns_t_any, "ANY", "\"any\""}, 466 {0, NULL, NULL} 467}; 468 469/*% 470 * Names of DNS rcodes. 471 */ 472const struct res_sym __p_rcode_syms[] = { 473 {ns_r_noerror, "NOERROR", "no error"}, 474 {ns_r_formerr, "FORMERR", "format error"}, 475 {ns_r_servfail, "SERVFAIL", "server failed"}, 476 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"}, 477 {ns_r_notimpl, "NOTIMP", "not implemented"}, 478 {ns_r_refused, "REFUSED", "refused"}, 479 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"}, 480 {ns_r_yxrrset, "YXRRSET", "rrset exists"}, 481 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"}, 482 {ns_r_notauth, "NOTAUTH", "not authoritative"}, 483 {ns_r_notzone, "NOTZONE", "Not in zone"}, 484 {ns_r_max, "", ""}, 485 {ns_r_badsig, "BADSIG", "bad signature"}, 486 {ns_r_badkey, "BADKEY", "bad key"}, 487 {ns_r_badtime, "BADTIME", "bad time"}, 488 {0, NULL, NULL} 489}; 490 491int 492sym_ston(const struct res_sym *syms, const char *name, int *success) { 493 for ((void)NULL; syms->name != 0; syms++) { 494 if (strcasecmp (name, syms->name) == 0) { 495 if (success) 496 *success = 1; 497 return (syms->number); 498 } 499 } 500 if (success) 501 *success = 0; 502 return (syms->number); /*%< The default value. */ 503} 504 505const char * 506sym_ntos(const struct res_sym *syms, int number, int *success) { 507 char *unname = sym_ntos_unname; 508 509 for ((void)NULL; syms->name != 0; syms++) { 510 if (number == syms->number) { 511 if (success) 512 *success = 1; 513 return (syms->name); 514 } 515 } 516 517 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 518 if (success) 519 *success = 0; 520 return (unname); 521} 522 523const char * 524sym_ntop(const struct res_sym *syms, int number, int *success) { 525 char *unname = sym_ntop_unname; 526 527 for ((void)NULL; syms->name != 0; syms++) { 528 if (number == syms->number) { 529 if (success) 530 *success = 1; 531 return (syms->humanname); 532 } 533 } 534 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 535 if (success) 536 *success = 0; 537 return (unname); 538} 539 540/*% 541 * Return a string for the type. 542 */ 543const char * 544p_type(int type) { 545 int success; 546 const char *result; 547 static char typebuf[20]; 548 549 result = sym_ntos(__p_type_syms, type, &success); 550 if (success) 551 return (result); 552 if (type < 0 || type > 0xffff) 553 return ("BADTYPE"); 554 sprintf(typebuf, "TYPE%d", type); 555 return (typebuf); 556} 557 558/*% 559 * Return a string for the type. 560 */ 561const char * 562p_section(int section, int opcode) { 563 const struct res_sym *symbols; 564 565 switch (opcode) { 566 case ns_o_update: 567 symbols = __p_update_section_syms; 568 break; 569 default: 570 symbols = __p_default_section_syms; 571 break; 572 } 573 return (sym_ntos(symbols, section, (int *)0)); 574} 575 576/*% 577 * Return a mnemonic for class. 578 */ 579const char * 580p_class(int class) { 581 int success; 582 const char *result; 583 static char classbuf[20]; 584 585 result = sym_ntos(__p_class_syms, class, &success); 586 if (success) 587 return (result); 588 if (class < 0 || class > 0xffff) 589 return ("BADCLASS"); 590 sprintf(classbuf, "CLASS%d", class); 591 return (classbuf); 592} 593 594/*% 595 * Return a mnemonic for an option 596 */ 597const char * 598p_option(u_long option) { 599 char *nbuf = p_option_nbuf; 600 601 switch (option) { 602 case RES_INIT: return "init"; 603 case RES_DEBUG: return "debug"; 604 case RES_AAONLY: return "aaonly(unimpl)"; 605 case RES_USEVC: return "usevc"; 606 case RES_PRIMARY: return "primry(unimpl)"; 607 case RES_IGNTC: return "igntc"; 608 case RES_RECURSE: return "recurs"; 609 case RES_DEFNAMES: return "defnam"; 610 case RES_STAYOPEN: return "styopn"; 611 case RES_DNSRCH: return "dnsrch"; 612 case RES_INSECURE1: return "insecure1"; 613 case RES_INSECURE2: return "insecure2"; 614 case RES_NOALIASES: return "noaliases"; 615 case RES_USE_INET6: return "inet6"; 616#ifdef RES_USE_EDNS0 /*%< KAME extension */ 617 case RES_USE_EDNS0: return "edns0"; 618#endif 619#ifdef RES_USE_DNAME 620 case RES_USE_DNAME: return "dname"; 621#endif 622#ifdef RES_USE_DNSSEC 623 case RES_USE_DNSSEC: return "dnssec"; 624#endif 625#ifdef RES_NOTLDQUERY 626 case RES_NOTLDQUERY: return "no-tld-query"; 627#endif 628#ifdef RES_NO_NIBBLE2 629 case RES_NO_NIBBLE2: return "no-nibble2"; 630#endif 631 /* XXX nonreentrant */ 632 default: sprintf(nbuf, "?0x%lx?", (u_long)option); 633 return (nbuf); 634 } 635} 636 637/*% 638 * Return a mnemonic for a time to live. 639 */ 640const char * 641p_time(u_int32_t value) { 642 char *nbuf = p_time_nbuf; 643 644 if (ns_format_ttl(value, nbuf, sizeof nbuf) < 0) 645 sprintf(nbuf, "%u", value); 646 return (nbuf); 647} 648 649/*% 650 * Return a string for the rcode. 651 */ 652const char * 653p_rcode(int rcode) { 654 return (sym_ntos(__p_rcode_syms, rcode, (int *)0)); 655} 656 657/*% 658 * Return a string for a res_sockaddr_union. 659 */ 660const char * 661p_sockun(union res_sockaddr_union u, char *buf, size_t size) { 662 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"]; 663 664 switch (u.sin.sin_family) { 665 case AF_INET: 666 inet_ntop(AF_INET, &u.sin.sin_addr, ret, sizeof ret); 667 break; 668#ifdef HAS_INET6_STRUCTS 669 case AF_INET6: 670 inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret); 671 break; 672#endif 673 default: 674 sprintf(ret, "[af%d]", u.sin.sin_family); 675 break; 676 } 677 if (size > 0U) { 678 strncpy(buf, ret, size - 1); 679 buf[size - 1] = '0'; 680 } 681 return (buf); 682} 683 684/*% 685 * routines to convert between on-the-wire RR format and zone file format. 686 * Does not contain conversion to/from decimal degrees; divide or multiply 687 * by 60*60*1000 for that. 688 */ 689 690static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000, 691 1000000,10000000,100000000,1000000000}; 692 693/*% takes an XeY precision/size value, returns a string representation. */ 694static const char * 695precsize_ntoa(prec) 696 u_int8_t prec; 697{ 698 char *retbuf = precsize_ntoa_retbuf; 699 unsigned long val; 700 int mantissa, exponent; 701 702 mantissa = (int)((prec >> 4) & 0x0f) % 10; 703 exponent = (int)((prec >> 0) & 0x0f) % 10; 704 705 val = mantissa * poweroften[exponent]; 706 707 (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100); 708 return (retbuf); 709} 710 711/*% converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */ 712static u_int8_t 713precsize_aton(const char **strptr) { 714 unsigned int mval = 0, cmval = 0; 715 u_int8_t retval = 0; 716 const char *cp; 717 int exponent; 718 int mantissa; 719 720 cp = *strptr; 721 722 while (isdigit((unsigned char)*cp)) 723 mval = mval * 10 + (*cp++ - '0'); 724 725 if (*cp == '.') { /*%< centimeters */ 726 cp++; 727 if (isdigit((unsigned char)*cp)) { 728 cmval = (*cp++ - '0') * 10; 729 if (isdigit((unsigned char)*cp)) { 730 cmval += (*cp++ - '0'); 731 } 732 } 733 } 734 cmval = (mval * 100) + cmval; 735 736 for (exponent = 0; exponent < 9; exponent++) 737 if (cmval < poweroften[exponent+1]) 738 break; 739 740 mantissa = cmval / poweroften[exponent]; 741 if (mantissa > 9) 742 mantissa = 9; 743 744 retval = (mantissa << 4) | exponent; 745 746 *strptr = cp; 747 748 return (retval); 749} 750 751/*% converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */ 752static u_int32_t 753latlon2ul(const char **latlonstrptr, int *which) { 754 const char *cp; 755 u_int32_t retval; 756 int deg = 0, min = 0, secs = 0, secsfrac = 0; 757 758 cp = *latlonstrptr; 759 760 while (isdigit((unsigned char)*cp)) 761 deg = deg * 10 + (*cp++ - '0'); 762 763 while (isspace((unsigned char)*cp)) 764 cp++; 765 766 if (!(isdigit((unsigned char)*cp))) 767 goto fndhemi; 768 769 while (isdigit((unsigned char)*cp)) 770 min = min * 10 + (*cp++ - '0'); 771 772 while (isspace((unsigned char)*cp)) 773 cp++; 774 775 if (!(isdigit((unsigned char)*cp))) 776 goto fndhemi; 777 778 while (isdigit((unsigned char)*cp)) 779 secs = secs * 10 + (*cp++ - '0'); 780 781 if (*cp == '.') { /*%< decimal seconds */ 782 cp++; 783 if (isdigit((unsigned char)*cp)) { 784 secsfrac = (*cp++ - '0') * 100; 785 if (isdigit((unsigned char)*cp)) { 786 secsfrac += (*cp++ - '0') * 10; 787 if (isdigit((unsigned char)*cp)) { 788 secsfrac += (*cp++ - '0'); 789 } 790 } 791 } 792 } 793 794 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 795 cp++; 796 797 while (isspace((unsigned char)*cp)) 798 cp++; 799 800 fndhemi: 801 switch (*cp) { 802 case 'N': case 'n': 803 case 'E': case 'e': 804 retval = ((unsigned)1<<31) 805 + (((((deg * 60) + min) * 60) + secs) * 1000) 806 + secsfrac; 807 break; 808 case 'S': case 's': 809 case 'W': case 'w': 810 retval = ((unsigned)1<<31) 811 - (((((deg * 60) + min) * 60) + secs) * 1000) 812 - secsfrac; 813 break; 814 default: 815 retval = 0; /*%< invalid value -- indicates error */ 816 break; 817 } 818 819 switch (*cp) { 820 case 'N': case 'n': 821 case 'S': case 's': 822 *which = 1; /*%< latitude */ 823 break; 824 case 'E': case 'e': 825 case 'W': case 'w': 826 *which = 2; /*%< longitude */ 827 break; 828 default: 829 *which = 0; /*%< error */ 830 break; 831 } 832 833 cp++; /*%< skip the hemisphere */ 834 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 835 cp++; 836 837 while (isspace((unsigned char)*cp)) /*%< move to next field */ 838 cp++; 839 840 *latlonstrptr = cp; 841 842 return (retval); 843} 844 845/*% 846 * converts a zone file representation in a string to an RDATA on-the-wire 847 * representation. */ 848int 849loc_aton(ascii, binary) 850 const char *ascii; 851 u_char *binary; 852{ 853 const char *cp, *maxcp; 854 u_char *bcp; 855 856 u_int32_t latit = 0, longit = 0, alt = 0; 857 u_int32_t lltemp1 = 0, lltemp2 = 0; 858 int altmeters = 0, altfrac = 0, altsign = 1; 859 u_int8_t hp = 0x16; /*%< default = 1e6 cm = 10000.00m = 10km */ 860 u_int8_t vp = 0x13; /*%< default = 1e3 cm = 10.00m */ 861 u_int8_t siz = 0x12; /*%< default = 1e2 cm = 1.00m */ 862 int which1 = 0, which2 = 0; 863 864 cp = ascii; 865 maxcp = cp + strlen(ascii); 866 867 lltemp1 = latlon2ul(&cp, &which1); 868 869 lltemp2 = latlon2ul(&cp, &which2); 870 871 switch (which1 + which2) { 872 case 3: /*%< 1 + 2, the only valid combination */ 873 if ((which1 == 1) && (which2 == 2)) { /*%< normal case */ 874 latit = lltemp1; 875 longit = lltemp2; 876 } else if ((which1 == 2) && (which2 == 1)) { /*%< reversed */ 877 longit = lltemp1; 878 latit = lltemp2; 879 } else { /*%< some kind of brokenness */ 880 return (0); 881 } 882 break; 883 default: /*%< we didn't get one of each */ 884 return (0); 885 } 886 887 /* altitude */ 888 if (*cp == '-') { 889 altsign = -1; 890 cp++; 891 } 892 893 if (*cp == '+') 894 cp++; 895 896 while (isdigit((unsigned char)*cp)) 897 altmeters = altmeters * 10 + (*cp++ - '0'); 898 899 if (*cp == '.') { /*%< decimal meters */ 900 cp++; 901 if (isdigit((unsigned char)*cp)) { 902 altfrac = (*cp++ - '0') * 10; 903 if (isdigit((unsigned char)*cp)) { 904 altfrac += (*cp++ - '0'); 905 } 906 } 907 } 908 909 alt = (10000000 + (altsign * (altmeters * 100 + altfrac))); 910 911 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 912 cp++; 913 914 while (isspace((unsigned char)*cp) && (cp < maxcp)) 915 cp++; 916 917 if (cp >= maxcp) 918 goto defaults; 919 920 siz = precsize_aton(&cp); 921 922 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 923 cp++; 924 925 while (isspace((unsigned char)*cp) && (cp < maxcp)) 926 cp++; 927 928 if (cp >= maxcp) 929 goto defaults; 930 931 hp = precsize_aton(&cp); 932 933 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 934 cp++; 935 936 while (isspace((unsigned char)*cp) && (cp < maxcp)) 937 cp++; 938 939 if (cp >= maxcp) 940 goto defaults; 941 942 vp = precsize_aton(&cp); 943 944 defaults: 945 946 bcp = binary; 947 *bcp++ = (u_int8_t) 0; /*%< version byte */ 948 *bcp++ = siz; 949 *bcp++ = hp; 950 *bcp++ = vp; 951 PUTLONG(latit,bcp); 952 PUTLONG(longit,bcp); 953 PUTLONG(alt,bcp); 954 955 return (16); /*%< size of RR in octets */ 956} 957 958/*% takes an on-the-wire LOC RR and formats it in a human readable format. */ 959const char * 960loc_ntoa(binary, ascii) 961 const u_char *binary; 962 char *ascii; 963{ 964 static const char *error = "?"; 965 static char tmpbuf[sizeof 966"1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"]; 967 const u_char *cp = binary; 968 969 int latdeg, latmin, latsec, latsecfrac; 970 int longdeg, longmin, longsec, longsecfrac; 971 char northsouth, eastwest; 972 const char *altsign; 973 int altmeters, altfrac; 974 975 const u_int32_t referencealt = 100000 * 100; 976 977 int32_t latval, longval, altval; 978 u_int32_t templ; 979 u_int8_t sizeval, hpval, vpval, versionval; 980 981 char *sizestr, *hpstr, *vpstr; 982 983 versionval = *cp++; 984 985 if (ascii == NULL) 986 ascii = tmpbuf; 987 988 if (versionval) { 989 (void) sprintf(ascii, "; error: unknown LOC RR version"); 990 return (ascii); 991 } 992 993 sizeval = *cp++; 994 995 hpval = *cp++; 996 vpval = *cp++; 997 998 GETLONG(templ, cp); 999 latval = (templ - ((unsigned)1<<31)); 1000 1001 GETLONG(templ, cp); 1002 longval = (templ - ((unsigned)1<<31)); 1003 1004 GETLONG(templ, cp); 1005 if (templ < referencealt) { /*%< below WGS 84 spheroid */ 1006 altval = referencealt - templ; 1007 altsign = "-"; 1008 } else { 1009 altval = templ - referencealt; 1010 altsign = ""; 1011 } 1012 1013 if (latval < 0) { 1014 northsouth = 'S'; 1015 latval = -latval; 1016 } else 1017 northsouth = 'N'; 1018 1019 latsecfrac = latval % 1000; 1020 latval = latval / 1000; 1021 latsec = latval % 60; 1022 latval = latval / 60; 1023 latmin = latval % 60; 1024 latval = latval / 60; 1025 latdeg = latval; 1026 1027 if (longval < 0) { 1028 eastwest = 'W'; 1029 longval = -longval; 1030 } else 1031 eastwest = 'E'; 1032 1033 longsecfrac = longval % 1000; 1034 longval = longval / 1000; 1035 longsec = longval % 60; 1036 longval = longval / 60; 1037 longmin = longval % 60; 1038 longval = longval / 60; 1039 longdeg = longval; 1040 1041 altfrac = altval % 100; 1042 altmeters = (altval / 100); 1043 1044 sizestr = strdup(precsize_ntoa(sizeval)); 1045 hpstr = strdup(precsize_ntoa(hpval)); 1046 vpstr = strdup(precsize_ntoa(vpval)); 1047 1048 sprintf(ascii, 1049 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm", 1050 latdeg, latmin, latsec, latsecfrac, northsouth, 1051 longdeg, longmin, longsec, longsecfrac, eastwest, 1052 altsign, altmeters, altfrac, 1053 (sizestr != NULL) ? sizestr : error, 1054 (hpstr != NULL) ? hpstr : error, 1055 (vpstr != NULL) ? vpstr : error); 1056 1057 if (sizestr != NULL) 1058 free(sizestr); 1059 if (hpstr != NULL) 1060 free(hpstr); 1061 if (vpstr != NULL) 1062 free(vpstr); 1063 1064 return (ascii); 1065} 1066 1067 1068/*% Return the number of DNS hierarchy levels in the name. */ 1069int 1070dn_count_labels(const char *name) { 1071 int i, len, count; 1072 1073 len = strlen(name); 1074 for (i = 0, count = 0; i < len; i++) { 1075 /* XXX need to check for \. or use named's nlabels(). */ 1076 if (name[i] == '.') 1077 count++; 1078 } 1079 1080 /* don't count initial wildcard */ 1081 if (name[0] == '*') 1082 if (count) 1083 count--; 1084 1085 /* don't count the null label for root. */ 1086 /* if terminating '.' not found, must adjust */ 1087 /* count to include last label */ 1088 if (len > 0 && name[len-1] != '.') 1089 count++; 1090 return (count); 1091} 1092 1093/*% 1094 * Make dates expressed in seconds-since-Jan-1-1970 easy to read. 1095 * SIG records are required to be printed like this, by the Secure DNS RFC. 1096 */ 1097char * 1098p_secstodate (u_long secs) { 1099 char *output = p_secstodate_output; 1100 time_t clock = secs; 1101 struct tm *time; 1102#ifdef HAVE_TIME_R 1103 struct tm res; 1104 1105 time = gmtime_r(&clock, &res); 1106#else 1107 time = gmtime(&clock); 1108#endif 1109 time->tm_year += 1900; 1110 time->tm_mon += 1; 1111 sprintf(output, "%04d%02d%02d%02d%02d%02d", 1112 time->tm_year, time->tm_mon, time->tm_mday, 1113 time->tm_hour, time->tm_min, time->tm_sec); 1114 return (output); 1115} 1116 1117u_int16_t 1118res_nametoclass(const char *buf, int *successp) { 1119 unsigned long result; 1120 char *endptr; 1121 int success; 1122 1123 result = sym_ston(__p_class_syms, buf, &success); 1124 if (success) 1125 goto done; 1126 1127 if (strncasecmp(buf, "CLASS", 5) != 0 || 1128 !isdigit((unsigned char)buf[5])) 1129 goto done; 1130 errno = 0; 1131 result = strtoul(buf + 5, &endptr, 10); 1132 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1133 success = 1; 1134 done: 1135 if (successp) 1136 *successp = success; 1137 return (result); 1138} 1139 1140u_int16_t 1141res_nametotype(const char *buf, int *successp) { 1142 unsigned long result; 1143 char *endptr; 1144 int success; 1145 1146 result = sym_ston(__p_type_syms, buf, &success); 1147 if (success) 1148 goto done; 1149 1150 if (strncasecmp(buf, "type", 4) != 0 || 1151 !isdigit((unsigned char)buf[4])) 1152 goto done; 1153 errno = 0; 1154 result = strtoul(buf + 4, &endptr, 10); 1155 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1156 success = 1; 1157 done: 1158 if (successp) 1159 *successp = success; 1160 return (result); 1161} 1162 1163/* 1164 * Weak aliases for applications that use certain private entry points, 1165 * and fail to include <resolv.h>. 1166 */ 1167#undef fp_resstat 1168__weak_reference(__fp_resstat, fp_resstat); 1169#undef p_fqnname 1170__weak_reference(__p_fqnname, p_fqnname); 1171#undef sym_ston 1172__weak_reference(__sym_ston, sym_ston); 1173#undef sym_ntos 1174__weak_reference(__sym_ntos, sym_ntos); 1175#undef sym_ntop 1176__weak_reference(__sym_ntop, sym_ntop); 1177#undef dn_count_labels 1178__weak_reference(__dn_count_labels, dn_count_labels); 1179#undef p_secstodate 1180__weak_reference(__p_secstodate, p_secstodate); 1181 1182/*! \file */ 1183