res_debug.c revision 168441
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 1.3.2.5.4.6 2005/07/28 07:43:22 marka Exp $"; 95#endif /* LIBC_SCCS and not lint */ 96#include <sys/cdefs.h> 97__FBSDID("$FreeBSD: head/lib/libc/resolv/res_debug.c 168441 2007-04-06 19:45:17Z kan $"); 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/* Return a fully-qualified domain name from a compressed name (with 320 length supplied). */ 321 322const u_char * 323p_fqnname(cp, msg, msglen, name, namelen) 324 const u_char *cp, *msg; 325 int msglen; 326 char *name; 327 int namelen; 328{ 329 int n, newlen; 330 331 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0) 332 return (NULL); 333 newlen = strlen(name); 334 if (newlen == 0 || name[newlen - 1] != '.') { 335 if (newlen + 1 >= namelen) /* Lack space for final dot */ 336 return (NULL); 337 else 338 strcpy(name + newlen, "."); 339 } 340 return (cp + n); 341} 342 343/* XXX: the rest of these functions need to become length-limited, too. */ 344 345const u_char * 346p_fqname(const u_char *cp, const u_char *msg, FILE *file) { 347 char name[MAXDNAME]; 348 const u_char *n; 349 350 n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name); 351 if (n == NULL) 352 return (NULL); 353 fputs(name, file); 354 return (n); 355} 356 357/* 358 * Names of RR classes and qclasses. Classes and qclasses are the same, except 359 * that C_ANY is a qclass but not a class. (You can ask for records of class 360 * C_ANY, but you can't have any records of that class in the database.) 361 */ 362const struct res_sym __p_class_syms[] = { 363 {C_IN, "IN", (char *)0}, 364 {C_CHAOS, "CH", (char *)0}, 365 {C_CHAOS, "CHAOS", (char *)0}, 366 {C_HS, "HS", (char *)0}, 367 {C_HS, "HESIOD", (char *)0}, 368 {C_ANY, "ANY", (char *)0}, 369 {C_NONE, "NONE", (char *)0}, 370 {C_IN, (char *)0, (char *)0} 371}; 372 373/* 374 * Names of message sections. 375 */ 376static const struct res_sym __p_default_section_syms[] = { 377 {ns_s_qd, "QUERY", (char *)0}, 378 {ns_s_an, "ANSWER", (char *)0}, 379 {ns_s_ns, "AUTHORITY", (char *)0}, 380 {ns_s_ar, "ADDITIONAL", (char *)0}, 381 {0, (char *)0, (char *)0} 382}; 383 384static const struct res_sym __p_update_section_syms[] = { 385 {S_ZONE, "ZONE", (char *)0}, 386 {S_PREREQ, "PREREQUISITE", (char *)0}, 387 {S_UPDATE, "UPDATE", (char *)0}, 388 {S_ADDT, "ADDITIONAL", (char *)0}, 389 {0, (char *)0, (char *)0} 390}; 391 392const struct res_sym __p_key_syms[] = { 393 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"}, 394 {NS_ALG_DH, "DH", "Diffie Hellman"}, 395 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"}, 396 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"}, 397 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"}, 398 {0, NULL, NULL} 399}; 400 401const struct res_sym __p_cert_syms[] = { 402 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"}, 403 {cert_t_spki, "SPKI", "SPKI certificate"}, 404 {cert_t_pgp, "PGP", "PGP certificate"}, 405 {cert_t_url, "URL", "URL Private"}, 406 {cert_t_oid, "OID", "OID Private"}, 407 {0, NULL, NULL} 408}; 409 410/* 411 * Names of RR types and qtypes. Types and qtypes are the same, except 412 * that T_ANY is a qtype but not a type. (You can ask for records of type 413 * T_ANY, but you can't have any records of that type in the database.) 414 */ 415const struct res_sym __p_type_syms[] = { 416 {ns_t_a, "A", "address"}, 417 {ns_t_ns, "NS", "name server"}, 418 {ns_t_md, "MD", "mail destination (deprecated)"}, 419 {ns_t_mf, "MF", "mail forwarder (deprecated)"}, 420 {ns_t_cname, "CNAME", "canonical name"}, 421 {ns_t_soa, "SOA", "start of authority"}, 422 {ns_t_mb, "MB", "mailbox"}, 423 {ns_t_mg, "MG", "mail group member"}, 424 {ns_t_mr, "MR", "mail rename"}, 425 {ns_t_null, "NULL", "null"}, 426 {ns_t_wks, "WKS", "well-known service (deprecated)"}, 427 {ns_t_ptr, "PTR", "domain name pointer"}, 428 {ns_t_hinfo, "HINFO", "host information"}, 429 {ns_t_minfo, "MINFO", "mailbox information"}, 430 {ns_t_mx, "MX", "mail exchanger"}, 431 {ns_t_txt, "TXT", "text"}, 432 {ns_t_rp, "RP", "responsible person"}, 433 {ns_t_afsdb, "AFSDB", "DCE or AFS server"}, 434 {ns_t_x25, "X25", "X25 address"}, 435 {ns_t_isdn, "ISDN", "ISDN address"}, 436 {ns_t_rt, "RT", "router"}, 437 {ns_t_nsap, "NSAP", "nsap address"}, 438 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"}, 439 {ns_t_sig, "SIG", "signature"}, 440 {ns_t_key, "KEY", "key"}, 441 {ns_t_px, "PX", "mapping information"}, 442 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"}, 443 {ns_t_aaaa, "AAAA", "IPv6 address"}, 444 {ns_t_loc, "LOC", "location"}, 445 {ns_t_nxt, "NXT", "next valid name (unimplemented)"}, 446 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"}, 447 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"}, 448 {ns_t_srv, "SRV", "server selection"}, 449 {ns_t_atma, "ATMA", "ATM address (unimplemented)"}, 450 {ns_t_tkey, "TKEY", "tkey"}, 451 {ns_t_tsig, "TSIG", "transaction signature"}, 452 {ns_t_ixfr, "IXFR", "incremental zone transfer"}, 453 {ns_t_axfr, "AXFR", "zone transfer"}, 454 {ns_t_zxfr, "ZXFR", "compressed zone transfer"}, 455 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"}, 456 {ns_t_maila, "MAILA", "mail agent (deprecated)"}, 457 {ns_t_naptr, "NAPTR", "URN Naming Authority"}, 458 {ns_t_kx, "KX", "Key Exchange"}, 459 {ns_t_cert, "CERT", "Certificate"}, 460 {ns_t_a6, "A6", "IPv6 Address"}, 461 {ns_t_dname, "DNAME", "dname"}, 462 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"}, 463 {ns_t_opt, "OPT", "EDNS Options"}, 464 {ns_t_any, "ANY", "\"any\""}, 465 {0, NULL, NULL} 466}; 467 468/* 469 * Names of DNS rcodes. 470 */ 471const struct res_sym __p_rcode_syms[] = { 472 {ns_r_noerror, "NOERROR", "no error"}, 473 {ns_r_formerr, "FORMERR", "format error"}, 474 {ns_r_servfail, "SERVFAIL", "server failed"}, 475 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"}, 476 {ns_r_notimpl, "NOTIMP", "not implemented"}, 477 {ns_r_refused, "REFUSED", "refused"}, 478 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"}, 479 {ns_r_yxrrset, "YXRRSET", "rrset exists"}, 480 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"}, 481 {ns_r_notauth, "NOTAUTH", "not authoritative"}, 482 {ns_r_notzone, "NOTZONE", "Not in zone"}, 483 {ns_r_max, "", ""}, 484 {ns_r_badsig, "BADSIG", "bad signature"}, 485 {ns_r_badkey, "BADKEY", "bad key"}, 486 {ns_r_badtime, "BADTIME", "bad time"}, 487 {0, NULL, NULL} 488}; 489 490int 491sym_ston(const struct res_sym *syms, const char *name, int *success) { 492 for ((void)NULL; syms->name != 0; syms++) { 493 if (strcasecmp (name, syms->name) == 0) { 494 if (success) 495 *success = 1; 496 return (syms->number); 497 } 498 } 499 if (success) 500 *success = 0; 501 return (syms->number); /* The default value. */ 502} 503 504const char * 505sym_ntos(const struct res_sym *syms, int number, int *success) { 506 char *unname = sym_ntos_unname; 507 508 for ((void)NULL; syms->name != 0; syms++) { 509 if (number == syms->number) { 510 if (success) 511 *success = 1; 512 return (syms->name); 513 } 514 } 515 516 sprintf(unname, "%d", number); /* XXX nonreentrant */ 517 if (success) 518 *success = 0; 519 return (unname); 520} 521 522const char * 523sym_ntop(const struct res_sym *syms, int number, int *success) { 524 char *unname = sym_ntop_unname; 525 526 for ((void)NULL; syms->name != 0; syms++) { 527 if (number == syms->number) { 528 if (success) 529 *success = 1; 530 return (syms->humanname); 531 } 532 } 533 sprintf(unname, "%d", number); /* XXX nonreentrant */ 534 if (success) 535 *success = 0; 536 return (unname); 537} 538 539/* 540 * Return a string for the type. 541 */ 542const char * 543p_type(int type) { 544 int success; 545 const char *result; 546 static char typebuf[20]; 547 548 result = sym_ntos(__p_type_syms, type, &success); 549 if (success) 550 return (result); 551 if (type < 0 || type > 0xffff) 552 return ("BADTYPE"); 553 sprintf(typebuf, "TYPE%d", type); 554 return (typebuf); 555} 556 557/* 558 * Return a string for the type. 559 */ 560const char * 561p_section(int section, int opcode) { 562 const struct res_sym *symbols; 563 564 switch (opcode) { 565 case ns_o_update: 566 symbols = __p_update_section_syms; 567 break; 568 default: 569 symbols = __p_default_section_syms; 570 break; 571 } 572 return (sym_ntos(symbols, section, (int *)0)); 573} 574 575/* 576 * Return a mnemonic for class. 577 */ 578const char * 579p_class(int class) { 580 int success; 581 const char *result; 582 static char classbuf[20]; 583 584 result = sym_ntos(__p_class_syms, class, &success); 585 if (success) 586 return (result); 587 if (class < 0 || class > 0xffff) 588 return ("BADCLASS"); 589 sprintf(classbuf, "CLASS%d", class); 590 return (classbuf); 591} 592 593/* 594 * Return a mnemonic for an option 595 */ 596const char * 597p_option(u_long option) { 598 char *nbuf = p_option_nbuf; 599 600 switch (option) { 601 case RES_INIT: return "init"; 602 case RES_DEBUG: return "debug"; 603 case RES_AAONLY: return "aaonly(unimpl)"; 604 case RES_USEVC: return "usevc"; 605 case RES_PRIMARY: return "primry(unimpl)"; 606 case RES_IGNTC: return "igntc"; 607 case RES_RECURSE: return "recurs"; 608 case RES_DEFNAMES: return "defnam"; 609 case RES_STAYOPEN: return "styopn"; 610 case RES_DNSRCH: return "dnsrch"; 611 case RES_INSECURE1: return "insecure1"; 612 case RES_INSECURE2: return "insecure2"; 613 case RES_NOALIASES: return "noaliases"; 614 case RES_USE_INET6: return "inet6"; 615#ifdef RES_USE_EDNS0 /* KAME extension */ 616 case RES_USE_EDNS0: return "edns0"; 617#endif 618#ifdef RES_USE_DNAME 619 case RES_USE_DNAME: return "dname"; 620#endif 621#ifdef RES_USE_DNSSEC 622 case RES_USE_DNSSEC: return "dnssec"; 623#endif 624#ifdef RES_NOTLDQUERY 625 case RES_NOTLDQUERY: return "no-tld-query"; 626#endif 627#ifdef RES_NO_NIBBLE2 628 case RES_NO_NIBBLE2: return "no-nibble2"; 629#endif 630 /* XXX nonreentrant */ 631 default: sprintf(nbuf, "?0x%lx?", (u_long)option); 632 return (nbuf); 633 } 634} 635 636/* 637 * Return a mnemonic for a time to live. 638 */ 639const char * 640p_time(u_int32_t value) { 641 char *nbuf = p_time_nbuf; 642 643 if (ns_format_ttl(value, nbuf, sizeof nbuf) < 0) 644 sprintf(nbuf, "%u", value); 645 return (nbuf); 646} 647 648/* 649 * Return a string for the rcode. 650 */ 651const char * 652p_rcode(int rcode) { 653 return (sym_ntos(__p_rcode_syms, rcode, (int *)0)); 654} 655 656/* 657 * Return a string for a res_sockaddr_union. 658 */ 659const char * 660p_sockun(union res_sockaddr_union u, char *buf, size_t size) { 661 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"]; 662 663 switch (u.sin.sin_family) { 664 case AF_INET: 665 inet_ntop(AF_INET, &u.sin.sin_addr, ret, sizeof ret); 666 break; 667#ifdef HAS_INET6_STRUCTS 668 case AF_INET6: 669 inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret); 670 break; 671#endif 672 default: 673 sprintf(ret, "[af%d]", u.sin.sin_family); 674 break; 675 } 676 if (size > 0U) { 677 strncpy(buf, ret, size - 1); 678 buf[size - 1] = '0'; 679 } 680 return (buf); 681} 682 683/* 684 * routines to convert between on-the-wire RR format and zone file format. 685 * Does not contain conversion to/from decimal degrees; divide or multiply 686 * by 60*60*1000 for that. 687 */ 688 689static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000, 690 1000000,10000000,100000000,1000000000}; 691 692/* takes an XeY precision/size value, returns a string representation. */ 693static const char * 694precsize_ntoa(prec) 695 u_int8_t prec; 696{ 697 char *retbuf = precsize_ntoa_retbuf; 698 unsigned long val; 699 int mantissa, exponent; 700 701 mantissa = (int)((prec >> 4) & 0x0f) % 10; 702 exponent = (int)((prec >> 0) & 0x0f) % 10; 703 704 val = mantissa * poweroften[exponent]; 705 706 (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100); 707 return (retbuf); 708} 709 710/* converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */ 711static u_int8_t 712precsize_aton(const char **strptr) { 713 unsigned int mval = 0, cmval = 0; 714 u_int8_t retval = 0; 715 const char *cp; 716 int exponent; 717 int mantissa; 718 719 cp = *strptr; 720 721 while (isdigit((unsigned char)*cp)) 722 mval = mval * 10 + (*cp++ - '0'); 723 724 if (*cp == '.') { /* centimeters */ 725 cp++; 726 if (isdigit((unsigned char)*cp)) { 727 cmval = (*cp++ - '0') * 10; 728 if (isdigit((unsigned char)*cp)) { 729 cmval += (*cp++ - '0'); 730 } 731 } 732 } 733 cmval = (mval * 100) + cmval; 734 735 for (exponent = 0; exponent < 9; exponent++) 736 if (cmval < poweroften[exponent+1]) 737 break; 738 739 mantissa = cmval / poweroften[exponent]; 740 if (mantissa > 9) 741 mantissa = 9; 742 743 retval = (mantissa << 4) | exponent; 744 745 *strptr = cp; 746 747 return (retval); 748} 749 750/* converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */ 751static u_int32_t 752latlon2ul(const char **latlonstrptr, int *which) { 753 const char *cp; 754 u_int32_t retval; 755 int deg = 0, min = 0, secs = 0, secsfrac = 0; 756 757 cp = *latlonstrptr; 758 759 while (isdigit((unsigned char)*cp)) 760 deg = deg * 10 + (*cp++ - '0'); 761 762 while (isspace((unsigned char)*cp)) 763 cp++; 764 765 if (!(isdigit((unsigned char)*cp))) 766 goto fndhemi; 767 768 while (isdigit((unsigned char)*cp)) 769 min = min * 10 + (*cp++ - '0'); 770 771 while (isspace((unsigned char)*cp)) 772 cp++; 773 774 if (!(isdigit((unsigned char)*cp))) 775 goto fndhemi; 776 777 while (isdigit((unsigned char)*cp)) 778 secs = secs * 10 + (*cp++ - '0'); 779 780 if (*cp == '.') { /* decimal seconds */ 781 cp++; 782 if (isdigit((unsigned char)*cp)) { 783 secsfrac = (*cp++ - '0') * 100; 784 if (isdigit((unsigned char)*cp)) { 785 secsfrac += (*cp++ - '0') * 10; 786 if (isdigit((unsigned char)*cp)) { 787 secsfrac += (*cp++ - '0'); 788 } 789 } 790 } 791 } 792 793 while (!isspace((unsigned char)*cp)) /* if any trailing garbage */ 794 cp++; 795 796 while (isspace((unsigned char)*cp)) 797 cp++; 798 799 fndhemi: 800 switch (*cp) { 801 case 'N': case 'n': 802 case 'E': case 'e': 803 retval = ((unsigned)1<<31) 804 + (((((deg * 60) + min) * 60) + secs) * 1000) 805 + secsfrac; 806 break; 807 case 'S': case 's': 808 case 'W': case 'w': 809 retval = ((unsigned)1<<31) 810 - (((((deg * 60) + min) * 60) + secs) * 1000) 811 - secsfrac; 812 break; 813 default: 814 retval = 0; /* invalid value -- indicates error */ 815 break; 816 } 817 818 switch (*cp) { 819 case 'N': case 'n': 820 case 'S': case 's': 821 *which = 1; /* latitude */ 822 break; 823 case 'E': case 'e': 824 case 'W': case 'w': 825 *which = 2; /* longitude */ 826 break; 827 default: 828 *which = 0; /* error */ 829 break; 830 } 831 832 cp++; /* skip the hemisphere */ 833 834 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/* converts a zone file representation in a string to an RDATA on-the-wire 846 * representation. */ 847int 848loc_aton(ascii, binary) 849 const char *ascii; 850 u_char *binary; 851{ 852 const char *cp, *maxcp; 853 u_char *bcp; 854 855 u_int32_t latit = 0, longit = 0, alt = 0; 856 u_int32_t lltemp1 = 0, lltemp2 = 0; 857 int altmeters = 0, altfrac = 0, altsign = 1; 858 u_int8_t hp = 0x16; /* default = 1e6 cm = 10000.00m = 10km */ 859 u_int8_t vp = 0x13; /* default = 1e3 cm = 10.00m */ 860 u_int8_t siz = 0x12; /* default = 1e2 cm = 1.00m */ 861 int which1 = 0, which2 = 0; 862 863 cp = ascii; 864 maxcp = cp + strlen(ascii); 865 866 lltemp1 = latlon2ul(&cp, &which1); 867 868 lltemp2 = latlon2ul(&cp, &which2); 869 870 switch (which1 + which2) { 871 case 3: /* 1 + 2, the only valid combination */ 872 if ((which1 == 1) && (which2 == 2)) { /* normal case */ 873 latit = lltemp1; 874 longit = lltemp2; 875 } else if ((which1 == 2) && (which2 == 1)) { /* reversed */ 876 longit = lltemp1; 877 latit = lltemp2; 878 } else { /* some kind of brokenness */ 879 return (0); 880 } 881 break; 882 default: /* we didn't get one of each */ 883 return (0); 884 } 885 886 /* altitude */ 887 if (*cp == '-') { 888 altsign = -1; 889 cp++; 890 } 891 892 if (*cp == '+') 893 cp++; 894 895 while (isdigit((unsigned char)*cp)) 896 altmeters = altmeters * 10 + (*cp++ - '0'); 897 898 if (*cp == '.') { /* decimal meters */ 899 cp++; 900 if (isdigit((unsigned char)*cp)) { 901 altfrac = (*cp++ - '0') * 10; 902 if (isdigit((unsigned char)*cp)) { 903 altfrac += (*cp++ - '0'); 904 } 905 } 906 } 907 908 alt = (10000000 + (altsign * (altmeters * 100 + altfrac))); 909 910 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */ 911 cp++; 912 913 while (isspace((unsigned char)*cp) && (cp < maxcp)) 914 cp++; 915 916 if (cp >= maxcp) 917 goto defaults; 918 919 siz = precsize_aton(&cp); 920 921 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */ 922 cp++; 923 924 while (isspace((unsigned char)*cp) && (cp < maxcp)) 925 cp++; 926 927 if (cp >= maxcp) 928 goto defaults; 929 930 hp = precsize_aton(&cp); 931 932 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */ 933 cp++; 934 935 while (isspace((unsigned char)*cp) && (cp < maxcp)) 936 cp++; 937 938 if (cp >= maxcp) 939 goto defaults; 940 941 vp = precsize_aton(&cp); 942 943 defaults: 944 945 bcp = binary; 946 *bcp++ = (u_int8_t) 0; /* version byte */ 947 *bcp++ = siz; 948 *bcp++ = hp; 949 *bcp++ = vp; 950 PUTLONG(latit,bcp); 951 PUTLONG(longit,bcp); 952 PUTLONG(alt,bcp); 953 954 return (16); /* size of RR in octets */ 955} 956 957/* takes an on-the-wire LOC RR and formats it in a human readable format. */ 958const char * 959loc_ntoa(binary, ascii) 960 const u_char *binary; 961 char *ascii; 962{ 963 static const char *error = "?"; 964 static char tmpbuf[sizeof 965"1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"]; 966 const u_char *cp = binary; 967 968 int latdeg, latmin, latsec, latsecfrac; 969 int longdeg, longmin, longsec, longsecfrac; 970 char northsouth, eastwest; 971 const char *altsign; 972 int altmeters, altfrac; 973 974 const u_int32_t referencealt = 100000 * 100; 975 976 int32_t latval, longval, altval; 977 u_int32_t templ; 978 u_int8_t sizeval, hpval, vpval, versionval; 979 980 char *sizestr, *hpstr, *vpstr; 981 982 versionval = *cp++; 983 984 if (ascii == NULL) 985 ascii = tmpbuf; 986 987 if (versionval) { 988 (void) sprintf(ascii, "; error: unknown LOC RR version"); 989 return (ascii); 990 } 991 992 sizeval = *cp++; 993 994 hpval = *cp++; 995 vpval = *cp++; 996 997 GETLONG(templ, cp); 998 latval = (templ - ((unsigned)1<<31)); 999 1000 GETLONG(templ, cp); 1001 longval = (templ - ((unsigned)1<<31)); 1002 1003 GETLONG(templ, cp); 1004 if (templ < referencealt) { /* below WGS 84 spheroid */ 1005 altval = referencealt - templ; 1006 altsign = "-"; 1007 } else { 1008 altval = templ - referencealt; 1009 altsign = ""; 1010 } 1011 1012 if (latval < 0) { 1013 northsouth = 'S'; 1014 latval = -latval; 1015 } else 1016 northsouth = 'N'; 1017 1018 latsecfrac = latval % 1000; 1019 latval = latval / 1000; 1020 latsec = latval % 60; 1021 latval = latval / 60; 1022 latmin = latval % 60; 1023 latval = latval / 60; 1024 latdeg = latval; 1025 1026 if (longval < 0) { 1027 eastwest = 'W'; 1028 longval = -longval; 1029 } else 1030 eastwest = 'E'; 1031 1032 longsecfrac = longval % 1000; 1033 longval = longval / 1000; 1034 longsec = longval % 60; 1035 longval = longval / 60; 1036 longmin = longval % 60; 1037 longval = longval / 60; 1038 longdeg = longval; 1039 1040 altfrac = altval % 100; 1041 altmeters = (altval / 100); 1042 1043 sizestr = strdup(precsize_ntoa(sizeval)); 1044 hpstr = strdup(precsize_ntoa(hpval)); 1045 vpstr = strdup(precsize_ntoa(vpval)); 1046 1047 sprintf(ascii, 1048 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm", 1049 latdeg, latmin, latsec, latsecfrac, northsouth, 1050 longdeg, longmin, longsec, longsecfrac, eastwest, 1051 altsign, altmeters, altfrac, 1052 (sizestr != NULL) ? sizestr : error, 1053 (hpstr != NULL) ? hpstr : error, 1054 (vpstr != NULL) ? vpstr : error); 1055 1056 if (sizestr != NULL) 1057 free(sizestr); 1058 if (hpstr != NULL) 1059 free(hpstr); 1060 if (vpstr != NULL) 1061 free(vpstr); 1062 1063 return (ascii); 1064} 1065 1066 1067/* Return the number of DNS hierarchy levels in the name. */ 1068int 1069dn_count_labels(const char *name) { 1070 int i, len, count; 1071 1072 len = strlen(name); 1073 for (i = 0, count = 0; i < len; i++) { 1074 /* XXX need to check for \. or use named's nlabels(). */ 1075 if (name[i] == '.') 1076 count++; 1077 } 1078 1079 /* don't count initial wildcard */ 1080 if (name[0] == '*') 1081 if (count) 1082 count--; 1083 1084 /* don't count the null label for root. */ 1085 /* if terminating '.' not found, must adjust */ 1086 /* count to include last label */ 1087 if (len > 0 && name[len-1] != '.') 1088 count++; 1089 return (count); 1090} 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