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 * Portions Copyright (c) 1996-1999 by Internet Software Consortium. 81 * 82 * Permission to use, copy, modify, and distribute this software for any 83 * purpose with or without fee is hereby granted, provided that the above 84 * copyright notice and this permission notice appear in all copies. 85 * 86 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS 87 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES 88 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE 89 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 90 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 91 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 92 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 93 * 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 1.1 2006/03/01 19:01:38 majka Exp $"; 99#endif /* LIBC_SCCS and not lint */ 100 101#ifndef __APPLE__ 102#include "port_before.h" 103#endif 104 105#include <sys/types.h> 106#include <sys/param.h> 107#include <sys/socket.h> 108 109#include <netinet/in.h> 110#include <arpa/inet.h> 111#include <arpa/nameser.h> 112 113#include <ctype.h> 114#include <errno.h> 115#include <math.h> 116#include <netdb.h> 117#include <resolv.h> 118#include <stdio.h> 119#include <stdlib.h> 120#include <string.h> 121#include <time.h> 122 123#ifndef __APPLE__ 124#include "port_after.h" 125#endif 126 127#ifdef SPRINTF_CHAR 128# define SPRINTF(x) strlen(sprintf/**/x) 129#else 130# define SPRINTF(x) sprintf x 131#endif 132 133extern const char * __res_opcodes[]; 134extern const char *_res_sectioncodes[]; 135 136/* 137 * Print the current options. 138 */ 139void 140fp_resstat(const res_state statp, FILE *file) { 141 u_long mask; 142 143 fprintf(file, ";; res options:"); 144 for (mask = 1; mask != 0; mask <<= 1) 145 if (statp->options & mask) 146 fprintf(file, " %s", p_option(mask)); 147 putc('\n', file); 148} 149 150static void 151do_section(const res_state statp, 152 ns_msg *handle, ns_sect section, 153 int pflag, FILE *file) 154{ 155 int n, sflag, rrnum; 156 static int buflen = 2048; 157 char *buf; 158 ns_opcode opcode; 159 ns_rr rr; 160 161 /* 162 * Print answer records. 163 */ 164 sflag = (statp->pfcode & pflag); 165 if (statp->pfcode && !sflag) 166 return; 167 168 buf = malloc(buflen); 169 if (buf == NULL) { 170 fprintf(file, ";; memory allocation failure\n"); 171 return; 172 } 173 174 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode); 175 rrnum = 0; 176 for (;;) { 177 if (ns_parserr(handle, section, rrnum, &rr)) { 178 if (errno != ENODEV) 179 fprintf(file, ";; ns_parserr: %s\n", 180 strerror(errno)); 181 else if (rrnum > 0 && sflag != 0 && 182 (statp->pfcode & RES_PRF_HEAD1)) 183 putc('\n', file); 184 goto cleanup; 185 } 186 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1)) 187 fprintf(file, ";; %s SECTION:\n", 188 p_section(section, opcode)); 189 if (section == ns_s_qd) 190 fprintf(file, ";;\t%s, type = %s, class = %s\n", 191 ns_rr_name(rr), 192 p_type(ns_rr_type(rr)), 193 p_class(ns_rr_class(rr))); 194 else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) { 195 u_int32_t ttl = ns_rr_ttl(rr); 196 fprintf(file, 197 "; EDNS: version: %u, udp=%u, flags=%04x\n", 198 (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff); 199 } else { 200 n = ns_sprintrr(handle, &rr, NULL, NULL, 201 buf, buflen); 202 if (n < 0) { 203 if (errno == ENOSPC) { 204 free(buf); 205 buf = NULL; 206 if (buflen < 131072) 207 buf = malloc(buflen += 1024); 208 if (buf == NULL) { 209 fprintf(file, 210 ";; memory allocation failure\n"); 211 return; 212 } 213 continue; 214 } 215 fprintf(file, ";; ns_sprintrr: %s\n", 216 strerror(errno)); 217 goto cleanup; 218 } 219 fputs(buf, file); 220 fputc('\n', file); 221 } 222 rrnum++; 223 } 224 cleanup: 225 if (buf != NULL) 226 free(buf); 227} 228 229/* 230 * Print the contents of a query. 231 * This is intended to be primarily a debugging routine. 232 */ 233void 234res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) { 235 ns_msg handle; 236 int qdcount, ancount, nscount, arcount; 237 u_int opcode, rcode, id; 238 239 if (ns_initparse(msg, len, &handle) < 0) { 240 fprintf(file, ";; ns_initparse: %s\n", strerror(errno)); 241 return; 242 } 243 opcode = ns_msg_getflag(handle, ns_f_opcode); 244 rcode = ns_msg_getflag(handle, ns_f_rcode); 245 id = ns_msg_id(handle); 246 qdcount = ns_msg_count(handle, ns_s_qd); 247 ancount = ns_msg_count(handle, ns_s_an); 248 nscount = ns_msg_count(handle, ns_s_ns); 249 arcount = ns_msg_count(handle, ns_s_ar); 250 251 /* 252 * Print header fields. 253 */ 254 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode) 255 fprintf(file, 256 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n", 257 __res_opcodes[opcode], p_rcode(rcode), id); 258 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX)) 259 putc(';', file); 260 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) { 261 fprintf(file, "; flags:"); 262 if (ns_msg_getflag(handle, ns_f_qr)) 263 fprintf(file, " qr"); 264 if (ns_msg_getflag(handle, ns_f_aa)) 265 fprintf(file, " aa"); 266 if (ns_msg_getflag(handle, ns_f_tc)) 267 fprintf(file, " tc"); 268 if (ns_msg_getflag(handle, ns_f_rd)) 269 fprintf(file, " rd"); 270 if (ns_msg_getflag(handle, ns_f_ra)) 271 fprintf(file, " ra"); 272 if (ns_msg_getflag(handle, ns_f_z)) 273 fprintf(file, " ??"); 274 if (ns_msg_getflag(handle, ns_f_ad)) 275 fprintf(file, " ad"); 276 if (ns_msg_getflag(handle, ns_f_cd)) 277 fprintf(file, " cd"); 278 } 279 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) { 280 fprintf(file, "; %s: %d", 281 p_section(ns_s_qd, opcode), qdcount); 282 fprintf(file, ", %s: %d", 283 p_section(ns_s_an, opcode), ancount); 284 fprintf(file, ", %s: %d", 285 p_section(ns_s_ns, opcode), nscount); 286 fprintf(file, ", %s: %d", 287 p_section(ns_s_ar, opcode), arcount); 288 } 289 if ((!statp->pfcode) || (statp->pfcode & 290 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) { 291 putc('\n',file); 292 } 293 /* 294 * Print the various sections. 295 */ 296 do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file); 297 do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file); 298 do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file); 299 do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file); 300 if (qdcount == 0 && ancount == 0 && 301 nscount == 0 && arcount == 0) 302 putc('\n', file); 303} 304 305const u_char * 306p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) { 307 char name[NS_MAXDNAME]; 308 int n; 309 310 if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0) 311 return (NULL); 312 if (name[0] == '\0') 313 putc('.', file); 314 else 315 fputs(name, file); 316 return (cp + n); 317} 318 319const u_char * 320p_cdname(const u_char *cp, const u_char *msg, FILE *file) { 321 return (p_cdnname(cp, msg, NS_PACKETSZ, file)); 322} 323 324/* Return a fully-qualified domain name from a compressed name (with 325 length supplied). */ 326 327const u_char * 328p_fqnname(cp, msg, msglen, name, namelen) 329 const u_char *cp, *msg; 330 int msglen; 331 char *name; 332 int namelen; 333{ 334 int n, newlen; 335 336 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0) 337 return (NULL); 338 newlen = strlen(name); 339 if (newlen == 0 || name[newlen - 1] != '.') { 340 if (newlen + 1 >= namelen) /* Lack space for final dot */ 341 return (NULL); 342 else 343 strcpy(name + newlen, "."); 344 } 345 return (cp + n); 346} 347 348/* XXX: the rest of these functions need to become length-limited, too. */ 349 350const u_char * 351p_fqname(const u_char *cp, const u_char *msg, FILE *file) { 352 char name[NS_MAXDNAME]; 353 const u_char *n; 354 355 n = p_fqnname(cp, msg, NS_MAXCDNAME, name, sizeof name); 356 if (n == NULL) 357 return (NULL); 358 fputs(name, file); 359 return (n); 360} 361 362/* 363 * Names of RR classes and qclasses. Classes and qclasses are the same, except 364 * that ns_c_any is a qclass but not a class. (You can ask for records of class 365 * ns_c_any, but you can't have any records of that class in the database.) 366 */ 367const struct res_sym __res_p_class_syms[] = { 368 {ns_c_in, "IN", (char *)0}, 369 {ns_c_chaos, "CHAOS", (char *)0}, 370 {ns_c_hs, "HS", (char *)0}, 371 {ns_c_hs, "HESIOD", (char *)0}, 372 {ns_c_any, "ANY", (char *)0}, 373 {ns_c_none, "NONE", (char *)0}, 374 {ns_c_in, (char *)0, (char *)0} 375}; 376 377/* 378 * Names of message sections. 379 */ 380#ifdef __APPLE__ 381static 382#endif 383const struct res_sym __res_p_default_section_syms[] = { 384 {ns_s_qd, "QUERY", (char *)0}, 385 {ns_s_an, "ANSWER", (char *)0}, 386 {ns_s_ns, "AUTHORITY", (char *)0}, 387 {ns_s_ar, "ADDITIONAL", (char *)0}, 388 {0, (char *)0, (char *)0} 389}; 390 391#ifdef __APPLE__ 392static 393#endif 394const struct res_sym __res_p_update_section_syms[] = { 395 {ns_s_zn, "ZONE", (char *)0}, 396 {ns_s_pr, "PREREQUISITE", (char *)0}, 397 {ns_s_ud, "UPDATE", (char *)0}, 398 {ns_s_ar, "ADDITIONAL", (char *)0}, 399 {0, (char *)0, (char *)0} 400}; 401 402const struct res_sym __res_p_key_syms[] = { 403 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"}, 404 {NS_ALG_DH, "DH", "Diffie Hellman"}, 405 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"}, 406 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"}, 407 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"}, 408 {0, NULL, NULL} 409}; 410 411const struct res_sym __res_p_cert_syms[] = { 412 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"}, 413 {cert_t_spki, "SPKI", "SPKI certificate"}, 414 {cert_t_pgp, "PGP", "PGP certificate"}, 415 {cert_t_url, "URL", "URL Private"}, 416 {cert_t_oid, "OID", "OID Private"}, 417 {0, NULL, NULL} 418}; 419 420/* 421 * Names of RR types and qtypes. Types and qtypes are the same, except 422 * that T_ANY is a qtype but not a type. (You can ask for records of type 423 * T_ANY, but you can't have any records of that type in the database.) 424 */ 425const struct res_sym __p_type_syms[] = { 426 {ns_t_a, "A", "address"}, 427 {ns_t_ns, "NS", "name server"}, 428 {ns_t_md, "MD", "mail destination (deprecated)"}, 429 {ns_t_mf, "MF", "mail forwarder (deprecated)"}, 430 {ns_t_cname, "CNAME", "canonical name"}, 431 {ns_t_soa, "SOA", "start of authority"}, 432 {ns_t_mb, "MB", "mailbox"}, 433 {ns_t_mg, "MG", "mail group member"}, 434 {ns_t_mr, "MR", "mail rename"}, 435 {ns_t_null, "NULL", "null"}, 436 {ns_t_wks, "WKS", "well-known service (deprecated)"}, 437 {ns_t_ptr, "PTR", "domain name pointer"}, 438 {ns_t_hinfo, "HINFO", "host information"}, 439 {ns_t_minfo, "MINFO", "mailbox information"}, 440 {ns_t_mx, "MX", "mail exchanger"}, 441 {ns_t_txt, "TXT", "text"}, 442 {ns_t_rp, "RP", "responsible person"}, 443 {ns_t_afsdb, "AFSDB", "DCE or AFS server"}, 444 {ns_t_x25, "X25", "X25 address"}, 445 {ns_t_isdn, "ISDN", "ISDN address"}, 446 {ns_t_rt, "RT", "router"}, 447 {ns_t_nsap, "NSAP", "nsap address"}, 448 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"}, 449 {ns_t_sig, "SIG", "signature"}, 450 {ns_t_key, "KEY", "key"}, 451 {ns_t_px, "PX", "mapping information"}, 452 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"}, 453 {ns_t_aaaa, "AAAA", "IPv6 address"}, 454 {ns_t_loc, "LOC", "location"}, 455 {ns_t_nxt, "NXT", "next valid name (unimplemented)"}, 456 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"}, 457 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"}, 458 {ns_t_srv, "SRV", "server selection"}, 459 {ns_t_atma, "ATMA", "ATM address (unimplemented)"}, 460 {ns_t_tkey, "TKEY", "tkey"}, 461 {ns_t_tsig, "TSIG", "transaction signature"}, 462 {ns_t_ixfr, "IXFR", "incremental zone transfer"}, 463 {ns_t_axfr, "AXFR", "zone transfer"}, 464 {ns_t_zxfr, "ZXFR", "compressed zone transfer"}, 465 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"}, 466 {ns_t_maila, "MAILA", "mail agent (deprecated)"}, 467 {ns_t_naptr, "NAPTR", "URN Naming Authority"}, 468 {ns_t_kx, "KX", "Key Exchange"}, 469 {ns_t_cert, "CERT", "Certificate"}, 470 {ns_t_a6, "A6", "IPv6 Address"}, 471 {ns_t_dname, "DNAME", "dname"}, 472 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"}, 473 {ns_t_opt, "OPT", "EDNS Options"}, 474 {ns_t_any, "ANY", "\"any\""}, 475 {0, NULL, NULL} 476}; 477 478/* 479 * Names of DNS rcodes. 480 */ 481const struct res_sym __res_p_rcode_syms[] = { 482 {ns_r_noerror, "NOERROR", "no error"}, 483 {ns_r_formerr, "FORMERR", "format error"}, 484 {ns_r_servfail, "SERVFAIL", "server failed"}, 485 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"}, 486 {ns_r_notimpl, "NOTIMP", "not implemented"}, 487 {ns_r_refused, "REFUSED", "refused"}, 488 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"}, 489 {ns_r_yxrrset, "YXRRSET", "rrset exists"}, 490 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"}, 491 {ns_r_notauth, "NOTAUTH", "not authoritative"}, 492 {ns_r_notzone, "NOTZONE", "Not in zone"}, 493 {ns_r_max, "", ""}, 494 {ns_r_badsig, "BADSIG", "bad signature"}, 495 {ns_r_badkey, "BADKEY", "bad key"}, 496 {ns_r_badtime, "BADTIME", "bad time"}, 497 {0, NULL, NULL} 498}; 499 500int 501sym_ston(const struct res_sym *syms, const char *name, int *success) { 502 for ((void)NULL; syms->name != 0; syms++) { 503 if (strcasecmp (name, syms->name) == 0) { 504 if (success) 505 *success = 1; 506 return (syms->number); 507 } 508 } 509 if (success) 510 *success = 0; 511 return (syms->number); /* The default value. */ 512} 513 514const char * 515sym_ntos(const struct res_sym *syms, int number, int *success) { 516 static char unname[20]; 517 518 for ((void)NULL; syms->name != 0; syms++) { 519 if (number == syms->number) { 520 if (success) 521 *success = 1; 522 return (syms->name); 523 } 524 } 525 526 sprintf(unname, "%d", number); /* XXX nonreentrant */ 527 if (success) 528 *success = 0; 529 return (unname); 530} 531 532const char * 533sym_ntop(const struct res_sym *syms, int number, int *success) { 534 static char unname[20]; 535 536 for ((void)NULL; syms->name != 0; syms++) { 537 if (number == syms->number) { 538 if (success) 539 *success = 1; 540 return (syms->humanname); 541 } 542 } 543 sprintf(unname, "%d", number); /* XXX nonreentrant */ 544 if (success) 545 *success = 0; 546 return (unname); 547} 548 549/* 550 * Return a string for the type. 551 */ 552const char * 553p_type(int type) { 554 int success; 555 const char *result; 556 static char typebuf[20]; 557 558 result = sym_ntos(__p_type_syms, type, &success); 559 if (success) 560 return (result); 561 if (type < 0 || type > 0xfff) 562 return ("BADTYPE"); 563 sprintf(typebuf, "TYPE%d", type); 564 return (typebuf); 565} 566 567/* 568 * Return a string for the type. 569 */ 570const char * 571p_section(int section, int opcode) { 572 const struct res_sym *symbols; 573 574 switch (opcode) { 575 case ns_o_update: 576 symbols = __res_p_update_section_syms; 577 break; 578 default: 579 symbols = __res_p_default_section_syms; 580 break; 581 } 582 return (sym_ntos(symbols, section, (int *)0)); 583} 584 585/* 586 * Return a mnemonic for class. 587 */ 588const char * 589p_class(int class) { 590 int success; 591 const char *result; 592 static char classbuf[20]; 593 594 result = sym_ntos(__res_p_class_syms, class, &success); 595 if (success) 596 return (result); 597 if (class < 0 || class > 0xfff) 598 return ("BADCLASS"); 599 sprintf(classbuf, "CLASS%d", class); 600 return (classbuf); 601} 602 603/* 604 * Return a mnemonic for an option 605 */ 606const char * 607p_option(u_long option) { 608 static char nbuf[40]; 609 610 switch (option) { 611 case RES_INIT: return "init"; 612 case RES_DEBUG: return "debug"; 613 case RES_AAONLY: return "aaonly(unimpl)"; 614 case RES_USEVC: return "usevc"; 615 case RES_PRIMARY: return "primry(unimpl)"; 616 case RES_IGNTC: return "igntc"; 617 case RES_RECURSE: return "recurs"; 618 case RES_DEFNAMES: return "defnam"; 619 case RES_STAYOPEN: return "styopn"; 620 case RES_DNSRCH: return "dnsrch"; 621 case RES_INSECURE1: return "insecure1"; 622 case RES_INSECURE2: return "insecure2"; 623 case RES_NOALIASES: return "noaliases"; 624 case RES_USE_INET6: return "inet6"; 625#ifdef RES_USE_EDNS0 /* KAME extension */ 626 case RES_USE_EDNS0: return "edns0"; 627#endif 628#ifdef RES_USE_A6 629 case RES_USE_A6: return "a6"; 630#endif 631#ifdef RES_USE_DNAME 632 case RES_USE_DNAME: return "dname"; 633#endif 634#ifdef RES_USE_DNSSEC 635 case RES_USE_DNSSEC: return "dnssec"; 636#endif 637#ifdef RES_NOTLDQUERY 638 case RES_NOTLDQUERY: return "no-tld-query"; 639#endif 640 641 /* XXX nonreentrant */ 642 default: sprintf(nbuf, "?0x%lx?", (u_long)option); 643 return (nbuf); 644 } 645} 646 647/* 648 * Return a mnemonic for a time to live. 649 */ 650const char * 651p_time(u_int32_t value) { 652 static char nbuf[40]; /* XXX nonreentrant */ 653 654 if (ns_format_ttl(value, nbuf, sizeof nbuf) < 0) 655 sprintf(nbuf, "%u", value); 656 return (nbuf); 657} 658 659/* 660 * Return a string for the rcode. 661 */ 662const char * 663p_rcode(int rcode) { 664 return (sym_ntos(__res_p_rcode_syms, rcode, (int *)0)); 665} 666 667/* 668 * routines to convert between on-the-wire RR format and zone file format. 669 * Does not contain conversion to/from decimal degrees; divide or multiply 670 * by 60*60*1000 for that. 671 */ 672 673static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000, 674 1000000,10000000,100000000,1000000000}; 675 676/* takes an XeY precision/size value, returns a string representation. */ 677static const char * 678precsize_ntoa(prec) 679 u_int8_t prec; 680{ 681 static char retbuf[sizeof "90000000.00"]; /* XXX nonreentrant */ 682 unsigned long val; 683 int mantissa, exponent; 684 685 mantissa = (int)((prec >> 4) & 0x0f) % 10; 686 exponent = (int)((prec >> 0) & 0x0f) % 10; 687 688 val = mantissa * poweroften[exponent]; 689 690 (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100); 691 return (retbuf); 692} 693 694/* converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */ 695static u_int8_t 696precsize_aton(const char **strptr) { 697 unsigned int mval = 0, cmval = 0; 698 u_int8_t retval = 0; 699 const char *cp; 700 int exponent; 701 int mantissa; 702 703 cp = *strptr; 704 705 while (isdigit((unsigned char)*cp)) 706 mval = mval * 10 + (*cp++ - '0'); 707 708 if (*cp == '.') { /* centimeters */ 709 cp++; 710 if (isdigit((unsigned char)*cp)) { 711 cmval = (*cp++ - '0') * 10; 712 if (isdigit((unsigned char)*cp)) { 713 cmval += (*cp++ - '0'); 714 } 715 } 716 } 717 cmval = (mval * 100) + cmval; 718 719 for (exponent = 0; exponent < 9; exponent++) 720 if (cmval < poweroften[exponent+1]) 721 break; 722 723 mantissa = cmval / poweroften[exponent]; 724 if (mantissa > 9) 725 mantissa = 9; 726 727 retval = (mantissa << 4) | exponent; 728 729 *strptr = cp; 730 731 return (retval); 732} 733 734/* converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */ 735static u_int32_t 736latlon2ul(const char **latlonstrptr, int *which) { 737 const char *cp; 738 u_int32_t retval; 739 int deg = 0, min = 0, secs = 0, secsfrac = 0; 740 741 cp = *latlonstrptr; 742 743 while (isdigit((unsigned char)*cp)) 744 deg = deg * 10 + (*cp++ - '0'); 745 746 while (isspace((unsigned char)*cp)) 747 cp++; 748 749 if (!(isdigit((unsigned char)*cp))) 750 goto fndhemi; 751 752 while (isdigit((unsigned char)*cp)) 753 min = min * 10 + (*cp++ - '0'); 754 755 while (isspace((unsigned char)*cp)) 756 cp++; 757 758 if (!(isdigit((unsigned char)*cp))) 759 goto fndhemi; 760 761 while (isdigit((unsigned char)*cp)) 762 secs = secs * 10 + (*cp++ - '0'); 763 764 if (*cp == '.') { /* decimal seconds */ 765 cp++; 766 if (isdigit((unsigned char)*cp)) { 767 secsfrac = (*cp++ - '0') * 100; 768 if (isdigit((unsigned char)*cp)) { 769 secsfrac += (*cp++ - '0') * 10; 770 if (isdigit((unsigned char)*cp)) { 771 secsfrac += (*cp++ - '0'); 772 } 773 } 774 } 775 } 776 777 while (!isspace((unsigned char)*cp)) /* if any trailing garbage */ 778 cp++; 779 780 while (isspace((unsigned char)*cp)) 781 cp++; 782 783 fndhemi: 784 switch (*cp) { 785 case 'N': case 'n': 786 case 'E': case 'e': 787 retval = ((unsigned)1<<31) 788 + (((((deg * 60) + min) * 60) + secs) * 1000) 789 + secsfrac; 790 break; 791 case 'S': case 's': 792 case 'W': case 'w': 793 retval = ((unsigned)1<<31) 794 - (((((deg * 60) + min) * 60) + secs) * 1000) 795 - secsfrac; 796 break; 797 default: 798 retval = 0; /* invalid value -- indicates error */ 799 break; 800 } 801 802 switch (*cp) { 803 case 'N': case 'n': 804 case 'S': case 's': 805 *which = 1; /* latitude */ 806 break; 807 case 'E': case 'e': 808 case 'W': case 'w': 809 *which = 2; /* longitude */ 810 break; 811 default: 812 *which = 0; /* error */ 813 break; 814 } 815 816 cp++; /* skip the hemisphere */ 817 818 while (!isspace((unsigned char)*cp)) /* if any trailing garbage */ 819 cp++; 820 821 while (isspace((unsigned char)*cp)) /* move to next field */ 822 cp++; 823 824 *latlonstrptr = cp; 825 826 return (retval); 827} 828 829/* converts a zone file representation in a string to an RDATA on-the-wire 830 * representation. */ 831int 832loc_aton(ascii, binary) 833 const char *ascii; 834 u_char *binary; 835{ 836 const char *cp, *maxcp; 837 u_char *bcp; 838 839 u_int32_t latit = 0, longit = 0, alt = 0; 840 u_int32_t lltemp1 = 0, lltemp2 = 0; 841 int altmeters = 0, altfrac = 0, altsign = 1; 842 u_int8_t hp = 0x16; /* default = 1e6 cm = 10000.00m = 10km */ 843 u_int8_t vp = 0x13; /* default = 1e3 cm = 10.00m */ 844 u_int8_t siz = 0x12; /* default = 1e2 cm = 1.00m */ 845 int which1 = 0, which2 = 0; 846 847 cp = ascii; 848 maxcp = cp + strlen(ascii); 849 850 lltemp1 = latlon2ul(&cp, &which1); 851 852 lltemp2 = latlon2ul(&cp, &which2); 853 854 switch (which1 + which2) { 855 case 3: /* 1 + 2, the only valid combination */ 856 if ((which1 == 1) && (which2 == 2)) { /* normal case */ 857 latit = lltemp1; 858 longit = lltemp2; 859 } else if ((which1 == 2) && (which2 == 1)) { /* reversed */ 860 longit = lltemp1; 861 latit = lltemp2; 862 } else { /* some kind of brokenness */ 863 return (0); 864 } 865 break; 866 default: /* we didn't get one of each */ 867 return (0); 868 } 869 870 /* altitude */ 871 if (*cp == '-') { 872 altsign = -1; 873 cp++; 874 } 875 876 if (*cp == '+') 877 cp++; 878 879 while (isdigit((unsigned char)*cp)) 880 altmeters = altmeters * 10 + (*cp++ - '0'); 881 882 if (*cp == '.') { /* decimal meters */ 883 cp++; 884 if (isdigit((unsigned char)*cp)) { 885 altfrac = (*cp++ - '0') * 10; 886 if (isdigit((unsigned char)*cp)) { 887 altfrac += (*cp++ - '0'); 888 } 889 } 890 } 891 892 alt = (10000000 + (altsign * (altmeters * 100 + altfrac))); 893 894 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */ 895 cp++; 896 897 while (isspace((unsigned char)*cp) && (cp < maxcp)) 898 cp++; 899 900 if (cp >= maxcp) 901 goto defaults; 902 903 siz = precsize_aton(&cp); 904 905 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */ 906 cp++; 907 908 while (isspace((unsigned char)*cp) && (cp < maxcp)) 909 cp++; 910 911 if (cp >= maxcp) 912 goto defaults; 913 914 hp = precsize_aton(&cp); 915 916 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */ 917 cp++; 918 919 while (isspace((unsigned char)*cp) && (cp < maxcp)) 920 cp++; 921 922 if (cp >= maxcp) 923 goto defaults; 924 925 vp = precsize_aton(&cp); 926 927 defaults: 928 929 bcp = binary; 930 *bcp++ = (u_int8_t) 0; /* version byte */ 931 *bcp++ = siz; 932 *bcp++ = hp; 933 *bcp++ = vp; 934 NS_PUT32(latit,bcp); 935 NS_PUT32(longit,bcp); 936 NS_PUT32(alt,bcp); 937 938 return (16); /* size of RR in octets */ 939} 940 941/* takes an on-the-wire LOC RR and formats it in a human readable format. */ 942const char * 943loc_ntoa(binary, ascii) 944 const u_char *binary; 945 char *ascii; 946{ 947 static const char *error = "?"; 948 static char tmpbuf[sizeof 949"1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"]; 950 const u_char *cp = binary; 951 952 int latdeg, latmin, latsec, latsecfrac; 953 int longdeg, longmin, longsec, longsecfrac; 954 char northsouth, eastwest; 955 const char *altsign; 956 int altmeters, altfrac; 957 958 const u_int32_t referencealt = 100000 * 100; 959 960 int32_t latval, longval, altval; 961 u_int32_t templ; 962 u_int8_t sizeval, hpval, vpval, versionval; 963 964 char *sizestr, *hpstr, *vpstr; 965 966 versionval = *cp++; 967 968 if (ascii == NULL) 969 ascii = tmpbuf; 970 971 if (versionval) { 972 (void) sprintf(ascii, "; error: unknown LOC RR version"); 973 return (ascii); 974 } 975 976 sizeval = *cp++; 977 978 hpval = *cp++; 979 vpval = *cp++; 980 981 NS_GET32(templ, cp); 982 latval = (templ - ((unsigned)1<<31)); 983 984 NS_GET32(templ, cp); 985 longval = (templ - ((unsigned)1<<31)); 986 987 NS_GET32(templ, cp); 988 if (templ < referencealt) { /* below WGS 84 spheroid */ 989 altval = referencealt - templ; 990 altsign = "-"; 991 } else { 992 altval = templ - referencealt; 993 altsign = ""; 994 } 995 996 if (latval < 0) { 997 northsouth = 'S'; 998 latval = -latval; 999 } else 1000 northsouth = 'N'; 1001 1002 latsecfrac = latval % 1000; 1003 latval = latval / 1000; 1004 latsec = latval % 60; 1005 latval = latval / 60; 1006 latmin = latval % 60; 1007 latval = latval / 60; 1008 latdeg = latval; 1009 1010 if (longval < 0) { 1011 eastwest = 'W'; 1012 longval = -longval; 1013 } else 1014 eastwest = 'E'; 1015 1016 longsecfrac = longval % 1000; 1017 longval = longval / 1000; 1018 longsec = longval % 60; 1019 longval = longval / 60; 1020 longmin = longval % 60; 1021 longval = longval / 60; 1022 longdeg = longval; 1023 1024 altfrac = altval % 100; 1025 altmeters = (altval / 100); 1026 1027 sizestr = strdup(precsize_ntoa(sizeval)); 1028 hpstr = strdup(precsize_ntoa(hpval)); 1029 vpstr = strdup(precsize_ntoa(vpval)); 1030 1031 sprintf(ascii, 1032 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm", 1033 latdeg, latmin, latsec, latsecfrac, northsouth, 1034 longdeg, longmin, longsec, longsecfrac, eastwest, 1035 altsign, altmeters, altfrac, 1036 (sizestr != NULL) ? sizestr : error, 1037 (hpstr != NULL) ? hpstr : error, 1038 (vpstr != NULL) ? vpstr : error); 1039 1040 if (sizestr != NULL) 1041 free(sizestr); 1042 if (hpstr != NULL) 1043 free(hpstr); 1044 if (vpstr != NULL) 1045 free(vpstr); 1046 1047 return (ascii); 1048} 1049 1050 1051/* Return the number of DNS hierarchy levels in the name. */ 1052int 1053dn_count_labels(const char *name) { 1054 int i, len, count; 1055 1056 len = strlen(name); 1057 for (i = 0, count = 0; i < len; i++) { 1058 /* XXX need to check for \. or use named's nlabels(). */ 1059 if (name[i] == '.') 1060 count++; 1061 } 1062 1063 /* don't count initial wildcard */ 1064 if (name[0] == '*') 1065 if (count) 1066 count--; 1067 1068 /* don't count the null label for root. */ 1069 /* if terminating '.' not found, must adjust */ 1070 /* count to include last label */ 1071 if (len > 0 && name[len-1] != '.') 1072 count++; 1073 return (count); 1074} 1075 1076 1077/* 1078 * Make dates expressed in seconds-since-Jan-1-1970 easy to read. 1079 * SIG records are required to be printed like this, by the Secure DNS RFC. 1080 */ 1081char * 1082p_secstodate (u_long secs) { 1083 /* XXX nonreentrant */ 1084 static char output[15]; /* YYYYMMDDHHMMSS and null */ 1085 time_t clock = secs; 1086 struct tm *time; 1087 1088#ifdef HAVE_TIME_R 1089 gmtime_r(&clock, &time); 1090#else 1091 time = gmtime(&clock); 1092#endif 1093 time->tm_year += 1900; 1094 time->tm_mon += 1; 1095 sprintf(output, "%04d%02d%02d%02d%02d%02d", 1096 time->tm_year, time->tm_mon, time->tm_mday, 1097 time->tm_hour, time->tm_min, time->tm_sec); 1098 return (output); 1099} 1100 1101u_int16_t 1102res_nametoclass(const char *buf, int *successp) { 1103 unsigned long result; 1104 char *endptr; 1105 int success; 1106 1107 result = sym_ston(__res_p_class_syms, buf, &success); 1108 if (success) 1109 goto done; 1110 1111 if (strncasecmp(buf, "CLASS", 5) != 0 || 1112 !isdigit((unsigned char)buf[5])) 1113 goto done; 1114 result = strtoul(buf + 5, &endptr, 10); 1115 if (*endptr == '\0' && result <= 0xffff) 1116 success = 1; 1117 done: 1118 if (successp) 1119 *successp = success; 1120 return (result); 1121} 1122 1123u_int16_t 1124res_nametotype(const char *buf, int *successp) { 1125 unsigned long result; 1126 char *endptr; 1127 int success; 1128 1129 result = sym_ston(__p_type_syms, buf, &success); 1130 if (success) 1131 goto done; 1132 1133 if (strncasecmp(buf, "type", 4) != 0 || 1134 !isdigit((unsigned char)buf[4])) 1135 goto done; 1136 result = strtoul(buf + 4, &endptr, 10); 1137 if (*endptr == '\0' && result <= 0xffff) 1138 success = 1; 1139 done: 1140 if (successp) 1141 *successp = success; 1142 return (result); 1143} 1144