res_debug.c revision 156952
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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34/* 35 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 36 * 37 * Permission to use, copy, modify, and distribute this software for any 38 * purpose with or without fee is hereby granted, provided that the above 39 * copyright notice and this permission notice appear in all copies, and that 40 * the name of Digital Equipment Corporation not be used in advertising or 41 * publicity pertaining to distribution of the document or software without 42 * specific, written prior permission. 43 * 44 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 45 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 46 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 47 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 48 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 49 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 50 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 51 * SOFTWARE. 52 */ 53 54/* 55 * Portions Copyright (c) 1995 by International Business Machines, Inc. 56 * 57 * International Business Machines, Inc. (hereinafter called IBM) grants 58 * permission under its copyrights to use, copy, modify, and distribute this 59 * Software with or without fee, provided that the above copyright notice and 60 * all paragraphs of this notice appear in all copies, and that the name of IBM 61 * not be used in connection with the marketing of any product incorporating 62 * the Software or modifications thereof, without specific, written prior 63 * permission. 64 * 65 * To the extent it has a right to do so, IBM grants an immunity from suit 66 * under its patents, if any, for the use, sale or manufacture of products to 67 * the extent that such products are used for performing Domain Name System 68 * dynamic updates in TCP/IP networks by means of the Software. No immunity is 69 * granted for any product per se or for any other function of any product. 70 * 71 * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES, 72 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 73 * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL, 74 * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING 75 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN 76 * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES. 77 */ 78 79/* 80 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 81 * Portions Copyright (c) 1996-1999 by Internet Software Consortium. 82 * 83 * Permission to use, copy, modify, and distribute this software for any 84 * purpose with or without fee is hereby granted, provided that the above 85 * copyright notice and this permission notice appear in all copies. 86 * 87 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 88 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 89 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 90 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 91 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 92 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 93 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 94 */ 95 96#if defined(LIBC_SCCS) && !defined(lint) 97static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93"; 98static const char rcsid[] = "$Id: res_debug.c,v 1.3.2.5.4.6 2005/07/28 07:43:22 marka Exp $"; 99#endif /* LIBC_SCCS and not lint */ 100 101#include "port_before.h" 102 103#include <sys/types.h> 104#include <sys/param.h> 105#include <sys/socket.h> 106 107#include <netinet/in.h> 108#include <arpa/inet.h> 109#include <arpa/nameser.h> 110 111#include <ctype.h> 112#include <errno.h> 113#include <math.h> 114#include <netdb.h> 115#include <resolv.h> 116#include <resolv_mt.h> 117#include <stdio.h> 118#include <stdlib.h> 119#include <string.h> 120#include <time.h> 121 122#include "port_after.h" 123 124#ifdef SPRINTF_CHAR 125# define SPRINTF(x) strlen(sprintf/**/x) 126#else 127# define SPRINTF(x) sprintf x 128#endif 129 130extern const char *_res_opcodes[]; 131extern const char *_res_sectioncodes[]; 132 133/* 134 * Print the current options. 135 */ 136void 137fp_resstat(const res_state statp, FILE *file) { 138 u_long mask; 139 140 fprintf(file, ";; res options:"); 141 for (mask = 1; mask != 0U; mask <<= 1) 142 if (statp->options & mask) 143 fprintf(file, " %s", p_option(mask)); 144 putc('\n', file); 145} 146 147static void 148do_section(const res_state statp, 149 ns_msg *handle, ns_sect section, 150 int pflag, FILE *file) 151{ 152 int n, sflag, rrnum; 153 static int buflen = 2048; 154 char *buf; 155 ns_opcode opcode; 156 ns_rr rr; 157 158 /* 159 * Print answer records. 160 */ 161 sflag = (statp->pfcode & pflag); 162 if (statp->pfcode && !sflag) 163 return; 164 165 buf = malloc(buflen); 166 if (buf == NULL) { 167 fprintf(file, ";; memory allocation failure\n"); 168 return; 169 } 170 171 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode); 172 rrnum = 0; 173 for (;;) { 174 if (ns_parserr(handle, section, rrnum, &rr)) { 175 if (errno != ENODEV) 176 fprintf(file, ";; ns_parserr: %s\n", 177 strerror(errno)); 178 else if (rrnum > 0 && sflag != 0 && 179 (statp->pfcode & RES_PRF_HEAD1)) 180 putc('\n', file); 181 goto cleanup; 182 } 183 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1)) 184 fprintf(file, ";; %s SECTION:\n", 185 p_section(section, opcode)); 186 if (section == ns_s_qd) 187 fprintf(file, ";;\t%s, type = %s, class = %s\n", 188 ns_rr_name(rr), 189 p_type(ns_rr_type(rr)), 190 p_class(ns_rr_class(rr))); 191 else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) { 192 u_int32_t ttl = ns_rr_ttl(rr); 193 fprintf(file, 194 "; EDNS: version: %u, udp=%u, flags=%04x\n", 195 (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff); 196 } else { 197 n = ns_sprintrr(handle, &rr, NULL, NULL, 198 buf, buflen); 199 if (n < 0) { 200 if (errno == ENOSPC) { 201 free(buf); 202 buf = NULL; 203 if (buflen < 131072) 204 buf = malloc(buflen += 1024); 205 if (buf == NULL) { 206 fprintf(file, 207 ";; memory allocation failure\n"); 208 return; 209 } 210 continue; 211 } 212 fprintf(file, ";; ns_sprintrr: %s\n", 213 strerror(errno)); 214 goto cleanup; 215 } 216 fputs(buf, file); 217 fputc('\n', file); 218 } 219 rrnum++; 220 } 221 cleanup: 222 if (buf != NULL) 223 free(buf); 224} 225 226/* 227 * Print the contents of a query. 228 * This is intended to be primarily a debugging routine. 229 */ 230void 231res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) { 232 ns_msg handle; 233 int qdcount, ancount, nscount, arcount; 234 u_int opcode, rcode, id; 235 236 if (ns_initparse(msg, len, &handle) < 0) { 237 fprintf(file, ";; ns_initparse: %s\n", strerror(errno)); 238 return; 239 } 240 opcode = ns_msg_getflag(handle, ns_f_opcode); 241 rcode = ns_msg_getflag(handle, ns_f_rcode); 242 id = ns_msg_id(handle); 243 qdcount = ns_msg_count(handle, ns_s_qd); 244 ancount = ns_msg_count(handle, ns_s_an); 245 nscount = ns_msg_count(handle, ns_s_ns); 246 arcount = ns_msg_count(handle, ns_s_ar); 247 248 /* 249 * Print header fields. 250 */ 251 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode) 252 fprintf(file, 253 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n", 254 _res_opcodes[opcode], p_rcode(rcode), id); 255 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX)) 256 putc(';', file); 257 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) { 258 fprintf(file, "; flags:"); 259 if (ns_msg_getflag(handle, ns_f_qr)) 260 fprintf(file, " qr"); 261 if (ns_msg_getflag(handle, ns_f_aa)) 262 fprintf(file, " aa"); 263 if (ns_msg_getflag(handle, ns_f_tc)) 264 fprintf(file, " tc"); 265 if (ns_msg_getflag(handle, ns_f_rd)) 266 fprintf(file, " rd"); 267 if (ns_msg_getflag(handle, ns_f_ra)) 268 fprintf(file, " ra"); 269 if (ns_msg_getflag(handle, ns_f_z)) 270 fprintf(file, " ??"); 271 if (ns_msg_getflag(handle, ns_f_ad)) 272 fprintf(file, " ad"); 273 if (ns_msg_getflag(handle, ns_f_cd)) 274 fprintf(file, " cd"); 275 } 276 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) { 277 fprintf(file, "; %s: %d", 278 p_section(ns_s_qd, opcode), qdcount); 279 fprintf(file, ", %s: %d", 280 p_section(ns_s_an, opcode), ancount); 281 fprintf(file, ", %s: %d", 282 p_section(ns_s_ns, opcode), nscount); 283 fprintf(file, ", %s: %d", 284 p_section(ns_s_ar, opcode), arcount); 285 } 286 if ((!statp->pfcode) || (statp->pfcode & 287 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) { 288 putc('\n',file); 289 } 290 /* 291 * Print the various sections. 292 */ 293 do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file); 294 do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file); 295 do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file); 296 do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file); 297 if (qdcount == 0 && ancount == 0 && 298 nscount == 0 && arcount == 0) 299 putc('\n', file); 300} 301 302const u_char * 303p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) { 304 char name[MAXDNAME]; 305 int n; 306 307 if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0) 308 return (NULL); 309 if (name[0] == '\0') 310 putc('.', file); 311 else 312 fputs(name, file); 313 return (cp + n); 314} 315 316const u_char * 317p_cdname(const u_char *cp, const u_char *msg, FILE *file) { 318 return (p_cdnname(cp, msg, PACKETSZ, file)); 319} 320 321/* Return a fully-qualified domain name from a compressed name (with 322 length supplied). */ 323 324const u_char * 325p_fqnname(cp, msg, msglen, name, namelen) 326 const u_char *cp, *msg; 327 int msglen; 328 char *name; 329 int namelen; 330{ 331 int n, newlen; 332 333 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0) 334 return (NULL); 335 newlen = strlen(name); 336 if (newlen == 0 || name[newlen - 1] != '.') { 337 if (newlen + 1 >= namelen) /* Lack space for final dot */ 338 return (NULL); 339 else 340 strcpy(name + newlen, "."); 341 } 342 return (cp + n); 343} 344 345/* XXX: the rest of these functions need to become length-limited, too. */ 346 347const u_char * 348p_fqname(const u_char *cp, const u_char *msg, FILE *file) { 349 char name[MAXDNAME]; 350 const u_char *n; 351 352 n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name); 353 if (n == NULL) 354 return (NULL); 355 fputs(name, file); 356 return (n); 357} 358 359/* 360 * Names of RR classes and qclasses. Classes and qclasses are the same, except 361 * that C_ANY is a qclass but not a class. (You can ask for records of class 362 * C_ANY, but you can't have any records of that class in the database.) 363 */ 364const struct res_sym __p_class_syms[] = { 365 {C_IN, "IN", (char *)0}, 366 {C_CHAOS, "CH", (char *)0}, 367 {C_CHAOS, "CHAOS", (char *)0}, 368 {C_HS, "HS", (char *)0}, 369 {C_HS, "HESIOD", (char *)0}, 370 {C_ANY, "ANY", (char *)0}, 371 {C_NONE, "NONE", (char *)0}, 372 {C_IN, (char *)0, (char *)0} 373}; 374 375/* 376 * Names of message sections. 377 */ 378const struct res_sym __p_default_section_syms[] = { 379 {ns_s_qd, "QUERY", (char *)0}, 380 {ns_s_an, "ANSWER", (char *)0}, 381 {ns_s_ns, "AUTHORITY", (char *)0}, 382 {ns_s_ar, "ADDITIONAL", (char *)0}, 383 {0, (char *)0, (char *)0} 384}; 385 386const struct res_sym __p_update_section_syms[] = { 387 {S_ZONE, "ZONE", (char *)0}, 388 {S_PREREQ, "PREREQUISITE", (char *)0}, 389 {S_UPDATE, "UPDATE", (char *)0}, 390 {S_ADDT, "ADDITIONAL", (char *)0}, 391 {0, (char *)0, (char *)0} 392}; 393 394const struct res_sym __p_key_syms[] = { 395 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"}, 396 {NS_ALG_DH, "DH", "Diffie Hellman"}, 397 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"}, 398 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"}, 399 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"}, 400 {0, NULL, NULL} 401}; 402 403const struct res_sym __p_cert_syms[] = { 404 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"}, 405 {cert_t_spki, "SPKI", "SPKI certificate"}, 406 {cert_t_pgp, "PGP", "PGP certificate"}, 407 {cert_t_url, "URL", "URL Private"}, 408 {cert_t_oid, "OID", "OID Private"}, 409 {0, NULL, NULL} 410}; 411 412/* 413 * Names of RR types and qtypes. Types and qtypes are the same, except 414 * that T_ANY is a qtype but not a type. (You can ask for records of type 415 * T_ANY, but you can't have any records of that type in the database.) 416 */ 417const struct res_sym __p_type_syms[] = { 418 {ns_t_a, "A", "address"}, 419 {ns_t_ns, "NS", "name server"}, 420 {ns_t_md, "MD", "mail destination (deprecated)"}, 421 {ns_t_mf, "MF", "mail forwarder (deprecated)"}, 422 {ns_t_cname, "CNAME", "canonical name"}, 423 {ns_t_soa, "SOA", "start of authority"}, 424 {ns_t_mb, "MB", "mailbox"}, 425 {ns_t_mg, "MG", "mail group member"}, 426 {ns_t_mr, "MR", "mail rename"}, 427 {ns_t_null, "NULL", "null"}, 428 {ns_t_wks, "WKS", "well-known service (deprecated)"}, 429 {ns_t_ptr, "PTR", "domain name pointer"}, 430 {ns_t_hinfo, "HINFO", "host information"}, 431 {ns_t_minfo, "MINFO", "mailbox information"}, 432 {ns_t_mx, "MX", "mail exchanger"}, 433 {ns_t_txt, "TXT", "text"}, 434 {ns_t_rp, "RP", "responsible person"}, 435 {ns_t_afsdb, "AFSDB", "DCE or AFS server"}, 436 {ns_t_x25, "X25", "X25 address"}, 437 {ns_t_isdn, "ISDN", "ISDN address"}, 438 {ns_t_rt, "RT", "router"}, 439 {ns_t_nsap, "NSAP", "nsap address"}, 440 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"}, 441 {ns_t_sig, "SIG", "signature"}, 442 {ns_t_key, "KEY", "key"}, 443 {ns_t_px, "PX", "mapping information"}, 444 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"}, 445 {ns_t_aaaa, "AAAA", "IPv6 address"}, 446 {ns_t_loc, "LOC", "location"}, 447 {ns_t_nxt, "NXT", "next valid name (unimplemented)"}, 448 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"}, 449 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"}, 450 {ns_t_srv, "SRV", "server selection"}, 451 {ns_t_atma, "ATMA", "ATM address (unimplemented)"}, 452 {ns_t_tkey, "TKEY", "tkey"}, 453 {ns_t_tsig, "TSIG", "transaction signature"}, 454 {ns_t_ixfr, "IXFR", "incremental zone transfer"}, 455 {ns_t_axfr, "AXFR", "zone transfer"}, 456 {ns_t_zxfr, "ZXFR", "compressed zone transfer"}, 457 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"}, 458 {ns_t_maila, "MAILA", "mail agent (deprecated)"}, 459 {ns_t_naptr, "NAPTR", "URN Naming Authority"}, 460 {ns_t_kx, "KX", "Key Exchange"}, 461 {ns_t_cert, "CERT", "Certificate"}, 462 {ns_t_a6, "A6", "IPv6 Address"}, 463 {ns_t_dname, "DNAME", "dname"}, 464 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"}, 465 {ns_t_opt, "OPT", "EDNS Options"}, 466 {ns_t_any, "ANY", "\"any\""}, 467 {0, NULL, NULL} 468}; 469 470/* 471 * Names of DNS rcodes. 472 */ 473const struct res_sym __p_rcode_syms[] = { 474 {ns_r_noerror, "NOERROR", "no error"}, 475 {ns_r_formerr, "FORMERR", "format error"}, 476 {ns_r_servfail, "SERVFAIL", "server failed"}, 477 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"}, 478 {ns_r_notimpl, "NOTIMP", "not implemented"}, 479 {ns_r_refused, "REFUSED", "refused"}, 480 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"}, 481 {ns_r_yxrrset, "YXRRSET", "rrset exists"}, 482 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"}, 483 {ns_r_notauth, "NOTAUTH", "not authoritative"}, 484 {ns_r_notzone, "NOTZONE", "Not in zone"}, 485 {ns_r_max, "", ""}, 486 {ns_r_badsig, "BADSIG", "bad signature"}, 487 {ns_r_badkey, "BADKEY", "bad key"}, 488 {ns_r_badtime, "BADTIME", "bad time"}, 489 {0, NULL, NULL} 490}; 491 492int 493sym_ston(const struct res_sym *syms, const char *name, int *success) { 494 for ((void)NULL; syms->name != 0; syms++) { 495 if (strcasecmp (name, syms->name) == 0) { 496 if (success) 497 *success = 1; 498 return (syms->number); 499 } 500 } 501 if (success) 502 *success = 0; 503 return (syms->number); /* The default value. */ 504} 505 506const char * 507sym_ntos(const struct res_sym *syms, int number, int *success) { 508 char *unname = sym_ntos_unname; 509 510 for ((void)NULL; syms->name != 0; syms++) { 511 if (number == syms->number) { 512 if (success) 513 *success = 1; 514 return (syms->name); 515 } 516 } 517 518 sprintf(unname, "%d", number); /* XXX nonreentrant */ 519 if (success) 520 *success = 0; 521 return (unname); 522} 523 524const char * 525sym_ntop(const struct res_sym *syms, int number, int *success) { 526 char *unname = sym_ntop_unname; 527 528 for ((void)NULL; syms->name != 0; syms++) { 529 if (number == syms->number) { 530 if (success) 531 *success = 1; 532 return (syms->humanname); 533 } 534 } 535 sprintf(unname, "%d", number); /* XXX nonreentrant */ 536 if (success) 537 *success = 0; 538 return (unname); 539} 540 541/* 542 * Return a string for the type. 543 */ 544const char * 545p_type(int type) { 546 int success; 547 const char *result; 548 static char typebuf[20]; 549 550 result = sym_ntos(__p_type_syms, type, &success); 551 if (success) 552 return (result); 553 if (type < 0 || type > 0xffff) 554 return ("BADTYPE"); 555 sprintf(typebuf, "TYPE%d", type); 556 return (typebuf); 557} 558 559/* 560 * Return a string for the type. 561 */ 562const char * 563p_section(int section, int opcode) { 564 const struct res_sym *symbols; 565 566 switch (opcode) { 567 case ns_o_update: 568 symbols = __p_update_section_syms; 569 break; 570 default: 571 symbols = __p_default_section_syms; 572 break; 573 } 574 return (sym_ntos(symbols, section, (int *)0)); 575} 576 577/* 578 * Return a mnemonic for class. 579 */ 580const char * 581p_class(int class) { 582 int success; 583 const char *result; 584 static char classbuf[20]; 585 586 result = sym_ntos(__p_class_syms, class, &success); 587 if (success) 588 return (result); 589 if (class < 0 || class > 0xffff) 590 return ("BADCLASS"); 591 sprintf(classbuf, "CLASS%d", class); 592 return (classbuf); 593} 594 595/* 596 * Return a mnemonic for an option 597 */ 598const char * 599p_option(u_long option) { 600 char *nbuf = p_option_nbuf; 601 602 switch (option) { 603 case RES_INIT: return "init"; 604 case RES_DEBUG: return "debug"; 605 case RES_AAONLY: return "aaonly(unimpl)"; 606 case RES_USEVC: return "usevc"; 607 case RES_PRIMARY: return "primry(unimpl)"; 608 case RES_IGNTC: return "igntc"; 609 case RES_RECURSE: return "recurs"; 610 case RES_DEFNAMES: return "defnam"; 611 case RES_STAYOPEN: return "styopn"; 612 case RES_DNSRCH: return "dnsrch"; 613 case RES_INSECURE1: return "insecure1"; 614 case RES_INSECURE2: return "insecure2"; 615 case RES_NOALIASES: return "noaliases"; 616 case RES_USE_INET6: return "inet6"; 617#ifdef RES_USE_EDNS0 /* KAME extension */ 618 case RES_USE_EDNS0: return "edns0"; 619#endif 620#ifdef RES_USE_DNAME 621 case RES_USE_DNAME: return "dname"; 622#endif 623#ifdef RES_USE_DNSSEC 624 case RES_USE_DNSSEC: return "dnssec"; 625#endif 626#ifdef RES_NOTLDQUERY 627 case RES_NOTLDQUERY: return "no-tld-query"; 628#endif 629#ifdef RES_NO_NIBBLE2 630 case RES_NO_NIBBLE2: return "no-nibble2"; 631#endif 632 /* XXX nonreentrant */ 633 default: sprintf(nbuf, "?0x%lx?", (u_long)option); 634 return (nbuf); 635 } 636} 637 638/* 639 * Return a mnemonic for a time to live. 640 */ 641const char * 642p_time(u_int32_t value) { 643 char *nbuf = p_time_nbuf; 644 645 if (ns_format_ttl(value, nbuf, sizeof nbuf) < 0) 646 sprintf(nbuf, "%u", value); 647 return (nbuf); 648} 649 650/* 651 * Return a string for the rcode. 652 */ 653const char * 654p_rcode(int rcode) { 655 return (sym_ntos(__p_rcode_syms, rcode, (int *)0)); 656} 657 658/* 659 * Return a string for a res_sockaddr_union. 660 */ 661const char * 662p_sockun(union res_sockaddr_union u, char *buf, size_t size) { 663 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"]; 664 665 switch (u.sin.sin_family) { 666 case AF_INET: 667 inet_ntop(AF_INET, &u.sin.sin_addr, ret, sizeof ret); 668 break; 669#ifdef HAS_INET6_STRUCTS 670 case AF_INET6: 671 inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret); 672 break; 673#endif 674 default: 675 sprintf(ret, "[af%d]", u.sin.sin_family); 676 break; 677 } 678 if (size > 0U) { 679 strncpy(buf, ret, size - 1); 680 buf[size - 1] = '0'; 681 } 682 return (buf); 683} 684 685/* 686 * routines to convert between on-the-wire RR format and zone file format. 687 * Does not contain conversion to/from decimal degrees; divide or multiply 688 * by 60*60*1000 for that. 689 */ 690 691static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000, 692 1000000,10000000,100000000,1000000000}; 693 694/* takes an XeY precision/size value, returns a string representation. */ 695static const char * 696precsize_ntoa(prec) 697 u_int8_t prec; 698{ 699 char *retbuf = precsize_ntoa_retbuf; 700 unsigned long val; 701 int mantissa, exponent; 702 703 mantissa = (int)((prec >> 4) & 0x0f) % 10; 704 exponent = (int)((prec >> 0) & 0x0f) % 10; 705 706 val = mantissa * poweroften[exponent]; 707 708 (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100); 709 return (retbuf); 710} 711 712/* converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */ 713static u_int8_t 714precsize_aton(const char **strptr) { 715 unsigned int mval = 0, cmval = 0; 716 u_int8_t retval = 0; 717 const char *cp; 718 int exponent; 719 int mantissa; 720 721 cp = *strptr; 722 723 while (isdigit((unsigned char)*cp)) 724 mval = mval * 10 + (*cp++ - '0'); 725 726 if (*cp == '.') { /* centimeters */ 727 cp++; 728 if (isdigit((unsigned char)*cp)) { 729 cmval = (*cp++ - '0') * 10; 730 if (isdigit((unsigned char)*cp)) { 731 cmval += (*cp++ - '0'); 732 } 733 } 734 } 735 cmval = (mval * 100) + cmval; 736 737 for (exponent = 0; exponent < 9; exponent++) 738 if (cmval < poweroften[exponent+1]) 739 break; 740 741 mantissa = cmval / poweroften[exponent]; 742 if (mantissa > 9) 743 mantissa = 9; 744 745 retval = (mantissa << 4) | exponent; 746 747 *strptr = cp; 748 749 return (retval); 750} 751 752/* converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */ 753static u_int32_t 754latlon2ul(const char **latlonstrptr, int *which) { 755 const char *cp; 756 u_int32_t retval; 757 int deg = 0, min = 0, secs = 0, secsfrac = 0; 758 759 cp = *latlonstrptr; 760 761 while (isdigit((unsigned char)*cp)) 762 deg = deg * 10 + (*cp++ - '0'); 763 764 while (isspace((unsigned char)*cp)) 765 cp++; 766 767 if (!(isdigit((unsigned char)*cp))) 768 goto fndhemi; 769 770 while (isdigit((unsigned char)*cp)) 771 min = min * 10 + (*cp++ - '0'); 772 773 while (isspace((unsigned char)*cp)) 774 cp++; 775 776 if (!(isdigit((unsigned char)*cp))) 777 goto fndhemi; 778 779 while (isdigit((unsigned char)*cp)) 780 secs = secs * 10 + (*cp++ - '0'); 781 782 if (*cp == '.') { /* decimal seconds */ 783 cp++; 784 if (isdigit((unsigned char)*cp)) { 785 secsfrac = (*cp++ - '0') * 100; 786 if (isdigit((unsigned char)*cp)) { 787 secsfrac += (*cp++ - '0') * 10; 788 if (isdigit((unsigned char)*cp)) { 789 secsfrac += (*cp++ - '0'); 790 } 791 } 792 } 793 } 794 795 while (!isspace((unsigned char)*cp)) /* if any trailing garbage */ 796 cp++; 797 798 while (isspace((unsigned char)*cp)) 799 cp++; 800 801 fndhemi: 802 switch (*cp) { 803 case 'N': case 'n': 804 case 'E': case 'e': 805 retval = ((unsigned)1<<31) 806 + (((((deg * 60) + min) * 60) + secs) * 1000) 807 + secsfrac; 808 break; 809 case 'S': case 's': 810 case 'W': case 'w': 811 retval = ((unsigned)1<<31) 812 - (((((deg * 60) + min) * 60) + secs) * 1000) 813 - secsfrac; 814 break; 815 default: 816 retval = 0; /* invalid value -- indicates error */ 817 break; 818 } 819 820 switch (*cp) { 821 case 'N': case 'n': 822 case 'S': case 's': 823 *which = 1; /* latitude */ 824 break; 825 case 'E': case 'e': 826 case 'W': case 'w': 827 *which = 2; /* longitude */ 828 break; 829 default: 830 *which = 0; /* error */ 831 break; 832 } 833 834 cp++; /* skip the hemisphere */ 835 836 while (!isspace((unsigned char)*cp)) /* if any trailing garbage */ 837 cp++; 838 839 while (isspace((unsigned char)*cp)) /* move to next field */ 840 cp++; 841 842 *latlonstrptr = cp; 843 844 return (retval); 845} 846 847/* converts a zone file representation in a string to an RDATA on-the-wire 848 * representation. */ 849int 850loc_aton(ascii, binary) 851 const char *ascii; 852 u_char *binary; 853{ 854 const char *cp, *maxcp; 855 u_char *bcp; 856 857 u_int32_t latit = 0, longit = 0, alt = 0; 858 u_int32_t lltemp1 = 0, lltemp2 = 0; 859 int altmeters = 0, altfrac = 0, altsign = 1; 860 u_int8_t hp = 0x16; /* default = 1e6 cm = 10000.00m = 10km */ 861 u_int8_t vp = 0x13; /* default = 1e3 cm = 10.00m */ 862 u_int8_t siz = 0x12; /* default = 1e2 cm = 1.00m */ 863 int which1 = 0, which2 = 0; 864 865 cp = ascii; 866 maxcp = cp + strlen(ascii); 867 868 lltemp1 = latlon2ul(&cp, &which1); 869 870 lltemp2 = latlon2ul(&cp, &which2); 871 872 switch (which1 + which2) { 873 case 3: /* 1 + 2, the only valid combination */ 874 if ((which1 == 1) && (which2 == 2)) { /* normal case */ 875 latit = lltemp1; 876 longit = lltemp2; 877 } else if ((which1 == 2) && (which2 == 1)) { /* reversed */ 878 longit = lltemp1; 879 latit = lltemp2; 880 } else { /* some kind of brokenness */ 881 return (0); 882 } 883 break; 884 default: /* we didn't get one of each */ 885 return (0); 886 } 887 888 /* altitude */ 889 if (*cp == '-') { 890 altsign = -1; 891 cp++; 892 } 893 894 if (*cp == '+') 895 cp++; 896 897 while (isdigit((unsigned char)*cp)) 898 altmeters = altmeters * 10 + (*cp++ - '0'); 899 900 if (*cp == '.') { /* decimal meters */ 901 cp++; 902 if (isdigit((unsigned char)*cp)) { 903 altfrac = (*cp++ - '0') * 10; 904 if (isdigit((unsigned char)*cp)) { 905 altfrac += (*cp++ - '0'); 906 } 907 } 908 } 909 910 alt = (10000000 + (altsign * (altmeters * 100 + altfrac))); 911 912 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */ 913 cp++; 914 915 while (isspace((unsigned char)*cp) && (cp < maxcp)) 916 cp++; 917 918 if (cp >= maxcp) 919 goto defaults; 920 921 siz = precsize_aton(&cp); 922 923 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */ 924 cp++; 925 926 while (isspace((unsigned char)*cp) && (cp < maxcp)) 927 cp++; 928 929 if (cp >= maxcp) 930 goto defaults; 931 932 hp = precsize_aton(&cp); 933 934 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */ 935 cp++; 936 937 while (isspace((unsigned char)*cp) && (cp < maxcp)) 938 cp++; 939 940 if (cp >= maxcp) 941 goto defaults; 942 943 vp = precsize_aton(&cp); 944 945 defaults: 946 947 bcp = binary; 948 *bcp++ = (u_int8_t) 0; /* version byte */ 949 *bcp++ = siz; 950 *bcp++ = hp; 951 *bcp++ = vp; 952 PUTLONG(latit,bcp); 953 PUTLONG(longit,bcp); 954 PUTLONG(alt,bcp); 955 956 return (16); /* size of RR in octets */ 957} 958 959/* takes an on-the-wire LOC RR and formats it in a human readable format. */ 960const char * 961loc_ntoa(binary, ascii) 962 const u_char *binary; 963 char *ascii; 964{ 965 static const char *error = "?"; 966 static char tmpbuf[sizeof 967"1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"]; 968 const u_char *cp = binary; 969 970 int latdeg, latmin, latsec, latsecfrac; 971 int longdeg, longmin, longsec, longsecfrac; 972 char northsouth, eastwest; 973 const char *altsign; 974 int altmeters, altfrac; 975 976 const u_int32_t referencealt = 100000 * 100; 977 978 int32_t latval, longval, altval; 979 u_int32_t templ; 980 u_int8_t sizeval, hpval, vpval, versionval; 981 982 char *sizestr, *hpstr, *vpstr; 983 984 versionval = *cp++; 985 986 if (ascii == NULL) 987 ascii = tmpbuf; 988 989 if (versionval) { 990 (void) sprintf(ascii, "; error: unknown LOC RR version"); 991 return (ascii); 992 } 993 994 sizeval = *cp++; 995 996 hpval = *cp++; 997 vpval = *cp++; 998 999 GETLONG(templ, cp); 1000 latval = (templ - ((unsigned)1<<31)); 1001 1002 GETLONG(templ, cp); 1003 longval = (templ - ((unsigned)1<<31)); 1004 1005 GETLONG(templ, cp); 1006 if (templ < referencealt) { /* below WGS 84 spheroid */ 1007 altval = referencealt - templ; 1008 altsign = "-"; 1009 } else { 1010 altval = templ - referencealt; 1011 altsign = ""; 1012 } 1013 1014 if (latval < 0) { 1015 northsouth = 'S'; 1016 latval = -latval; 1017 } else 1018 northsouth = 'N'; 1019 1020 latsecfrac = latval % 1000; 1021 latval = latval / 1000; 1022 latsec = latval % 60; 1023 latval = latval / 60; 1024 latmin = latval % 60; 1025 latval = latval / 60; 1026 latdeg = latval; 1027 1028 if (longval < 0) { 1029 eastwest = 'W'; 1030 longval = -longval; 1031 } else 1032 eastwest = 'E'; 1033 1034 longsecfrac = longval % 1000; 1035 longval = longval / 1000; 1036 longsec = longval % 60; 1037 longval = longval / 60; 1038 longmin = longval % 60; 1039 longval = longval / 60; 1040 longdeg = longval; 1041 1042 altfrac = altval % 100; 1043 altmeters = (altval / 100); 1044 1045 sizestr = strdup(precsize_ntoa(sizeval)); 1046 hpstr = strdup(precsize_ntoa(hpval)); 1047 vpstr = strdup(precsize_ntoa(vpval)); 1048 1049 sprintf(ascii, 1050 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm", 1051 latdeg, latmin, latsec, latsecfrac, northsouth, 1052 longdeg, longmin, longsec, longsecfrac, eastwest, 1053 altsign, altmeters, altfrac, 1054 (sizestr != NULL) ? sizestr : error, 1055 (hpstr != NULL) ? hpstr : error, 1056 (vpstr != NULL) ? vpstr : error); 1057 1058 if (sizestr != NULL) 1059 free(sizestr); 1060 if (hpstr != NULL) 1061 free(hpstr); 1062 if (vpstr != NULL) 1063 free(vpstr); 1064 1065 return (ascii); 1066} 1067 1068 1069/* Return the number of DNS hierarchy levels in the name. */ 1070int 1071dn_count_labels(const char *name) { 1072 int i, len, count; 1073 1074 len = strlen(name); 1075 for (i = 0, count = 0; i < len; i++) { 1076 /* XXX need to check for \. or use named's nlabels(). */ 1077 if (name[i] == '.') 1078 count++; 1079 } 1080 1081 /* don't count initial wildcard */ 1082 if (name[0] == '*') 1083 if (count) 1084 count--; 1085 1086 /* don't count the null label for root. */ 1087 /* if terminating '.' not found, must adjust */ 1088 /* count to include last label */ 1089 if (len > 0 && name[len-1] != '.') 1090 count++; 1091 return (count); 1092} 1093 1094 1095/* 1096 * Make dates expressed in seconds-since-Jan-1-1970 easy to read. 1097 * SIG records are required to be printed like this, by the Secure DNS RFC. 1098 */ 1099char * 1100p_secstodate (u_long secs) { 1101 char *output = p_secstodate_output; 1102 time_t clock = secs; 1103 struct tm *time; 1104#ifdef HAVE_TIME_R 1105 struct tm res; 1106 1107 time = gmtime_r(&clock, &res); 1108#else 1109 time = gmtime(&clock); 1110#endif 1111 time->tm_year += 1900; 1112 time->tm_mon += 1; 1113 sprintf(output, "%04d%02d%02d%02d%02d%02d", 1114 time->tm_year, time->tm_mon, time->tm_mday, 1115 time->tm_hour, time->tm_min, time->tm_sec); 1116 return (output); 1117} 1118 1119u_int16_t 1120res_nametoclass(const char *buf, int *successp) { 1121 unsigned long result; 1122 char *endptr; 1123 int success; 1124 1125 result = sym_ston(__p_class_syms, buf, &success); 1126 if (success) 1127 goto done; 1128 1129 if (strncasecmp(buf, "CLASS", 5) != 0 || 1130 !isdigit((unsigned char)buf[5])) 1131 goto done; 1132 errno = 0; 1133 result = strtoul(buf + 5, &endptr, 10); 1134 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1135 success = 1; 1136 done: 1137 if (successp) 1138 *successp = success; 1139 return (result); 1140} 1141 1142u_int16_t 1143res_nametotype(const char *buf, int *successp) { 1144 unsigned long result; 1145 char *endptr; 1146 int success; 1147 1148 result = sym_ston(__p_type_syms, buf, &success); 1149 if (success) 1150 goto done; 1151 1152 if (strncasecmp(buf, "type", 4) != 0 || 1153 !isdigit((unsigned char)buf[4])) 1154 goto done; 1155 errno = 0; 1156 result = strtoul(buf + 4, &endptr, 10); 1157 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1158 success = 1; 1159 done: 1160 if (successp) 1161 *successp = success; 1162 return (result); 1163} 1164