1 /* $NetBSD: res_debug.c,v 1.10 2008/06/21 20:41:48 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1985 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 /* 37 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 38 * 39 * Permission to use, copy, modify, and distribute this software for any 40 * purpose with or without fee is hereby granted, provided that the above 41 * copyright notice and this permission notice appear in all copies, and that 42 * the name of Digital Equipment Corporation not be used in advertising or 43 * publicity pertaining to distribution of the document or software without 44 * specific, written prior permission. 45 * 46 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 47 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 48 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 49 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 50 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 51 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 52 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 53 * SOFTWARE. 54 */ 55 56 /* 57 * Portions Copyright (c) 1995 by International Business Machines, Inc. 58 * 59 * International Business Machines, Inc. (hereinafter called IBM) grants 60 * permission under its copyrights to use, copy, modify, and distribute this 61 * Software with or without fee, provided that the above copyright notice and 62 * all paragraphs of this notice appear in all copies, and that the name of IBM 63 * not be used in connection with the marketing of any product incorporating 64 * the Software or modifications thereof, without specific, written prior 65 * permission. 66 * 67 * To the extent it has a right to do so, IBM grants an immunity from suit 68 * under its patents, if any, for the use, sale or manufacture of products to 69 * the extent that such products are used for performing Domain Name System 70 * dynamic updates in TCP/IP networks by means of the Software. No immunity is 71 * granted for any product per se or for any other function of any product. 72 * 73 * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES, 74 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 75 * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL, 76 * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING 77 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN 78 * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES. 79 */ 80 81 /* 82 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 83 * Portions Copyright (c) 1996-1999 by Internet Software Consortium. 84 * 85 * Permission to use, copy, modify, and distribute this software for any 86 * purpose with or without fee is hereby granted, provided that the above 87 * copyright notice and this permission notice appear in all copies. 88 * 89 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 90 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 91 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 92 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 93 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 94 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 95 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 96 */ 97 98 #include <sys/cdefs.h> 99 #if defined(LIBC_SCCS) && !defined(lint) 100 #ifdef notdef 101 static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93"; 102 static const char rcsid[] = "Id: res_debug.c,v 1.15.574.1 2008/04/03 02:12:21 marka Exp"; 103 #else 104 __RCSID("$NetBSD: res_debug.c,v 1.10 2008/06/21 20:41:48 christos Exp $"); 105 #endif 106 #endif /* LIBC_SCCS and not lint */ 107 108 #include "port_before.h" 109 110 #include "namespace.h" 111 #include <sys/types.h> 112 #include <sys/param.h> 113 #include <sys/socket.h> 114 115 #include <netinet/in.h> 116 #include <arpa/inet.h> 117 #include <arpa/nameser.h> 118 119 #include <ctype.h> 120 #include <errno.h> 121 #include <math.h> 122 #include <netdb.h> 123 #include <resolv.h> 124 #include <resolv_mt.h> 125 #include <stdio.h> 126 #include <stdlib.h> 127 #include <string.h> 128 #include <time.h> 129 130 #include "port_after.h" 131 132 #ifdef SPRINTF_CHAR 133 # define SPRINTF(x) strlen(sprintf/**/x) 134 #else 135 # define SPRINTF(x) sprintf x 136 #endif 137 138 extern const char *_res_opcodes[]; 139 extern const char *_res_sectioncodes[]; 140 141 #if 0 142 #ifdef __weak_alias 143 __weak_alias(res_pquery,__res_pquery) 144 __weak_alias(res_nametoclass,__res_nametoclass) 145 __weak_alias(res_nametotype,__res_nametotype) 146 #endif 147 #endif 148 149 #ifndef _LIBC 150 /*% 151 * Print the current options. 152 */ 153 void 154 fp_resstat(const res_state statp, FILE *file) { 155 u_long mask; 156 157 fprintf(file, ";; res options:"); 158 for (mask = 1; mask != 0U; mask <<= 1) 159 if (statp->options & mask) 160 fprintf(file, " %s", p_option(mask)); 161 putc('\n', file); 162 } 163 #endif 164 165 static void 166 do_section(const res_state statp, 167 ns_msg *handle, ns_sect section, 168 int pflag, FILE *file) 169 { 170 int n, sflag, rrnum; 171 static int buflen = 2048; 172 char *buf; 173 ns_opcode opcode; 174 ns_rr rr; 175 176 /* 177 * Print answer records. 178 */ 179 sflag = (statp->pfcode & pflag); 180 if (statp->pfcode && !sflag) 181 return; 182 183 buf = malloc((size_t)buflen); 184 if (buf == NULL) { 185 fprintf(file, ";; memory allocation failure\n"); 186 return; 187 } 188 189 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode); 190 rrnum = 0; 191 for (;;) { 192 if (ns_parserr(handle, section, rrnum, &rr)) { 193 if (errno != ENODEV) 194 fprintf(file, ";; ns_parserr: %s\n", 195 strerror(errno)); 196 else if (rrnum > 0 && sflag != 0 && 197 (statp->pfcode & RES_PRF_HEAD1)) 198 putc('\n', file); 199 goto cleanup; 200 } 201 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1)) 202 fprintf(file, ";; %s SECTION:\n", 203 p_section(section, opcode)); 204 if (section == ns_s_qd) 205 fprintf(file, ";;\t%s, type = %s, class = %s\n", 206 ns_rr_name(rr), 207 p_type(ns_rr_type(rr)), 208 p_class(ns_rr_class(rr))); 209 else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) { 210 u_int16_t optcode, optlen, rdatalen = ns_rr_rdlen(rr); 211 u_int32_t ttl = ns_rr_ttl(rr); 212 213 fprintf(file, 214 "; EDNS: version: %u, udp=%u, flags=%04x\n", 215 (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff); 216 217 while (rdatalen >= 4) { 218 const u_char *cp = ns_rr_rdata(rr); 219 int i; 220 221 GETSHORT(optcode, cp); 222 GETSHORT(optlen, cp); 223 224 if (optcode == NS_OPT_NSID) { 225 fputs("; NSID: ", file); 226 if (optlen == 0) { 227 fputs("; NSID\n", file); 228 } else { 229 fputs("; NSID: ", file); 230 for (i = 0; i < optlen; i++) 231 fprintf(file, "%02x ", 232 cp[i]); 233 fputs(" (",file); 234 for (i = 0; i < optlen; i++) 235 fprintf(file, "%c", 236 isprint(cp[i])? 237 cp[i] : '.'); 238 fputs(")\n", file); 239 } 240 } else { 241 if (optlen == 0) { 242 fprintf(file, "; OPT=%u\n", 243 optcode); 244 } else { 245 fprintf(file, "; OPT=%u: ", 246 optcode); 247 for (i = 0; i < optlen; i++) 248 fprintf(file, "%02x ", 249 cp[i]); 250 fputs(" (",file); 251 for (i = 0; i < optlen; i++) 252 fprintf(file, "%c", 253 isprint(cp[i]) ? 254 cp[i] : '.'); 255 fputs(")\n", file); 256 } 257 } 258 rdatalen -= 4 + optlen; 259 } 260 } else { 261 n = ns_sprintrr(handle, &rr, NULL, NULL, 262 buf, (u_int)buflen); 263 if (n < 0) { 264 if (errno == ENOSPC) { 265 free(buf); 266 buf = NULL; 267 if (buflen < 131072) 268 buf = malloc((size_t)(buflen += 1024)); 269 if (buf == NULL) { 270 fprintf(file, 271 ";; memory allocation failure\n"); 272 return; 273 } 274 continue; 275 } 276 fprintf(file, ";; ns_sprintrr: %s\n", 277 strerror(errno)); 278 goto cleanup; 279 } 280 fputs(buf, file); 281 fputc('\n', file); 282 } 283 rrnum++; 284 } 285 cleanup: 286 if (buf != NULL) 287 free(buf); 288 } 289 290 /*% 291 * Print the contents of a query. 292 * This is intended to be primarily a debugging routine. 293 */ 294 void 295 res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) { 296 ns_msg handle; 297 int qdcount, ancount, nscount, arcount; 298 u_int opcode, rcode, id; 299 300 if (ns_initparse(msg, len, &handle) < 0) { 301 fprintf(file, ";; ns_initparse: %s\n", strerror(errno)); 302 return; 303 } 304 opcode = ns_msg_getflag(handle, ns_f_opcode); 305 rcode = ns_msg_getflag(handle, ns_f_rcode); 306 id = ns_msg_id(handle); 307 qdcount = ns_msg_count(handle, ns_s_qd); 308 ancount = ns_msg_count(handle, ns_s_an); 309 nscount = ns_msg_count(handle, ns_s_ns); 310 arcount = ns_msg_count(handle, ns_s_ar); 311 312 /* 313 * Print header fields. 314 */ 315 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode) 316 fprintf(file, 317 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n", 318 _res_opcodes[opcode], p_rcode((int)rcode), id); 319 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX)) 320 putc(';', file); 321 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) { 322 fprintf(file, "; flags:"); 323 if (ns_msg_getflag(handle, ns_f_qr)) 324 fprintf(file, " qr"); 325 if (ns_msg_getflag(handle, ns_f_aa)) 326 fprintf(file, " aa"); 327 if (ns_msg_getflag(handle, ns_f_tc)) 328 fprintf(file, " tc"); 329 if (ns_msg_getflag(handle, ns_f_rd)) 330 fprintf(file, " rd"); 331 if (ns_msg_getflag(handle, ns_f_ra)) 332 fprintf(file, " ra"); 333 if (ns_msg_getflag(handle, ns_f_z)) 334 fprintf(file, " ??"); 335 if (ns_msg_getflag(handle, ns_f_ad)) 336 fprintf(file, " ad"); 337 if (ns_msg_getflag(handle, ns_f_cd)) 338 fprintf(file, " cd"); 339 } 340 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) { 341 fprintf(file, "; %s: %d", 342 p_section(ns_s_qd, (int)opcode), qdcount); 343 fprintf(file, ", %s: %d", 344 p_section(ns_s_an, (int)opcode), ancount); 345 fprintf(file, ", %s: %d", 346 p_section(ns_s_ns, (int)opcode), nscount); 347 fprintf(file, ", %s: %d", 348 p_section(ns_s_ar, (int)opcode), arcount); 349 } 350 if ((!statp->pfcode) || (statp->pfcode & 351 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) { 352 putc('\n',file); 353 } 354 /* 355 * Print the various sections. 356 */ 357 do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file); 358 do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file); 359 do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file); 360 do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file); 361 if (qdcount == 0 && ancount == 0 && 362 nscount == 0 && arcount == 0) 363 putc('\n', file); 364 } 365 366 const u_char * 367 p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) { 368 char name[MAXDNAME]; 369 int n; 370 371 if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0) 372 return (NULL); 373 if (name[0] == '\0') 374 putc('.', file); 375 else 376 fputs(name, file); 377 return (cp + n); 378 } 379 380 const u_char * 381 p_cdname(const u_char *cp, const u_char *msg, FILE *file) { 382 return (p_cdnname(cp, msg, PACKETSZ, file)); 383 } 384 385 /*% 386 * Return a fully-qualified domain name from a compressed name (with 387 length supplied). */ 388 389 const u_char * 390 p_fqnname(cp, msg, msglen, name, namelen) 391 const u_char *cp, *msg; 392 int msglen; 393 char *name; 394 int namelen; 395 { 396 int n, newlen; 397 398 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0) 399 return (NULL); 400 newlen = strlen(name); 401 if (newlen == 0 || name[newlen - 1] != '.') { 402 if (newlen + 1 >= namelen) /*%< Lack space for final dot */ 403 return (NULL); 404 else 405 strcpy(name + newlen, "."); 406 } 407 return (cp + n); 408 } 409 410 /* XXX: the rest of these functions need to become length-limited, too. */ 411 412 const u_char * 413 p_fqname(const u_char *cp, const u_char *msg, FILE *file) { 414 char name[MAXDNAME]; 415 const u_char *n; 416 417 n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name); 418 if (n == NULL) 419 return (NULL); 420 fputs(name, file); 421 return (n); 422 } 423 424 /*% 425 * Names of RR classes and qclasses. Classes and qclasses are the same, except 426 * that C_ANY is a qclass but not a class. (You can ask for records of class 427 * C_ANY, but you can't have any records of that class in the database.) 428 */ 429 const struct res_sym __p_class_syms[] = { 430 {C_IN, "IN", (char *)0}, 431 {C_CHAOS, "CH", (char *)0}, 432 {C_CHAOS, "CHAOS", (char *)0}, 433 {C_HS, "HS", (char *)0}, 434 {C_HS, "HESIOD", (char *)0}, 435 {C_ANY, "ANY", (char *)0}, 436 {C_NONE, "NONE", (char *)0}, 437 {C_IN, (char *)0, (char *)0} 438 }; 439 440 /*% 441 * Names of message sections. 442 */ 443 const struct res_sym __p_default_section_syms[] = { 444 {ns_s_qd, "QUERY", (char *)0}, 445 {ns_s_an, "ANSWER", (char *)0}, 446 {ns_s_ns, "AUTHORITY", (char *)0}, 447 {ns_s_ar, "ADDITIONAL", (char *)0}, 448 {0, (char *)0, (char *)0} 449 }; 450 451 const struct res_sym __p_update_section_syms[] = { 452 {S_ZONE, "ZONE", (char *)0}, 453 {S_PREREQ, "PREREQUISITE", (char *)0}, 454 {S_UPDATE, "UPDATE", (char *)0}, 455 {S_ADDT, "ADDITIONAL", (char *)0}, 456 {0, (char *)0, (char *)0} 457 }; 458 459 const struct res_sym __p_key_syms[] = { 460 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"}, 461 {NS_ALG_DH, "DH", "Diffie Hellman"}, 462 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"}, 463 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"}, 464 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"}, 465 {0, NULL, NULL} 466 }; 467 468 const struct res_sym __p_cert_syms[] = { 469 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"}, 470 {cert_t_spki, "SPKI", "SPKI certificate"}, 471 {cert_t_pgp, "PGP", "PGP certificate"}, 472 {cert_t_url, "URL", "URL Private"}, 473 {cert_t_oid, "OID", "OID Private"}, 474 {0, NULL, NULL} 475 }; 476 477 /*% 478 * Names of RR types and qtypes. Types and qtypes are the same, except 479 * that T_ANY is a qtype but not a type. (You can ask for records of type 480 * T_ANY, but you can't have any records of that type in the database.) 481 */ 482 const struct res_sym __p_type_syms[] = { 483 {ns_t_a, "A", "address"}, 484 {ns_t_ns, "NS", "name server"}, 485 {ns_t_md, "MD", "mail destination (deprecated)"}, 486 {ns_t_mf, "MF", "mail forwarder (deprecated)"}, 487 {ns_t_cname, "CNAME", "canonical name"}, 488 {ns_t_soa, "SOA", "start of authority"}, 489 {ns_t_mb, "MB", "mailbox"}, 490 {ns_t_mg, "MG", "mail group member"}, 491 {ns_t_mr, "MR", "mail rename"}, 492 {ns_t_null, "NULL", "null"}, 493 {ns_t_wks, "WKS", "well-known service (deprecated)"}, 494 {ns_t_ptr, "PTR", "domain name pointer"}, 495 {ns_t_hinfo, "HINFO", "host information"}, 496 {ns_t_minfo, "MINFO", "mailbox information"}, 497 {ns_t_mx, "MX", "mail exchanger"}, 498 {ns_t_txt, "TXT", "text"}, 499 {ns_t_rp, "RP", "responsible person"}, 500 {ns_t_afsdb, "AFSDB", "DCE or AFS server"}, 501 {ns_t_x25, "X25", "X25 address"}, 502 {ns_t_isdn, "ISDN", "ISDN address"}, 503 {ns_t_rt, "RT", "router"}, 504 {ns_t_nsap, "NSAP", "nsap address"}, 505 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"}, 506 {ns_t_sig, "SIG", "signature"}, 507 {ns_t_key, "KEY", "key"}, 508 {ns_t_px, "PX", "mapping information"}, 509 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"}, 510 {ns_t_aaaa, "AAAA", "IPv6 address"}, 511 {ns_t_loc, "LOC", "location"}, 512 {ns_t_nxt, "NXT", "next valid name (unimplemented)"}, 513 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"}, 514 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"}, 515 {ns_t_srv, "SRV", "server selection"}, 516 {ns_t_atma, "ATMA", "ATM address (unimplemented)"}, 517 {ns_t_tkey, "TKEY", "tkey"}, 518 {ns_t_tsig, "TSIG", "transaction signature"}, 519 {ns_t_ixfr, "IXFR", "incremental zone transfer"}, 520 {ns_t_axfr, "AXFR", "zone transfer"}, 521 {ns_t_zxfr, "ZXFR", "compressed zone transfer"}, 522 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"}, 523 {ns_t_maila, "MAILA", "mail agent (deprecated)"}, 524 {ns_t_naptr, "NAPTR", "URN Naming Authority"}, 525 {ns_t_kx, "KX", "Key Exchange"}, 526 {ns_t_cert, "CERT", "Certificate"}, 527 {ns_t_a6, "A6", "IPv6 Address"}, 528 {ns_t_dname, "DNAME", "dname"}, 529 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"}, 530 {ns_t_opt, "OPT", "EDNS Options"}, 531 {ns_t_any, "ANY", "\"any\""}, 532 {0, NULL, NULL} 533 }; 534 535 /*% 536 * Names of DNS rcodes. 537 */ 538 const struct res_sym __p_rcode_syms[] = { 539 {ns_r_noerror, "NOERROR", "no error"}, 540 {ns_r_formerr, "FORMERR", "format error"}, 541 {ns_r_servfail, "SERVFAIL", "server failed"}, 542 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"}, 543 {ns_r_notimpl, "NOTIMP", "not implemented"}, 544 {ns_r_refused, "REFUSED", "refused"}, 545 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"}, 546 {ns_r_yxrrset, "YXRRSET", "rrset exists"}, 547 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"}, 548 {ns_r_notauth, "NOTAUTH", "not authoritative"}, 549 {ns_r_notzone, "NOTZONE", "Not in zone"}, 550 {ns_r_max, "", ""}, 551 {ns_r_badsig, "BADSIG", "bad signature"}, 552 {ns_r_badkey, "BADKEY", "bad key"}, 553 {ns_r_badtime, "BADTIME", "bad time"}, 554 {0, NULL, NULL} 555 }; 556 557 int 558 sym_ston(const struct res_sym *syms, const char *name, int *success) { 559 for (; syms->name != 0; syms++) { 560 if (strcasecmp (name, syms->name) == 0) { 561 if (success) 562 *success = 1; 563 return (syms->number); 564 } 565 } 566 if (success) 567 *success = 0; 568 return (syms->number); /*%< The default value. */ 569 } 570 571 const char * 572 sym_ntos(const struct res_sym *syms, int number, int *success) { 573 char *unname = sym_ntos_unname; 574 575 for (; syms->name != 0; syms++) { 576 if (number == syms->number) { 577 if (success) 578 *success = 1; 579 return (syms->name); 580 } 581 } 582 583 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 584 if (success) 585 *success = 0; 586 return (unname); 587 } 588 589 const char * 590 sym_ntop(const struct res_sym *syms, int number, int *success) { 591 char *unname = sym_ntop_unname; 592 593 for (; syms->name != 0; syms++) { 594 if (number == syms->number) { 595 if (success) 596 *success = 1; 597 return (syms->humanname); 598 } 599 } 600 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 601 if (success) 602 *success = 0; 603 return (unname); 604 } 605 606 /*% 607 * Return a string for the type. 608 */ 609 const char * 610 p_type(int type) { 611 int success; 612 const char *result; 613 static char typebuf[20]; 614 615 result = sym_ntos(__p_type_syms, type, &success); 616 if (success) 617 return (result); 618 if (type < 0 || type > 0xffff) 619 return ("BADTYPE"); 620 sprintf(typebuf, "TYPE%d", type); 621 return (typebuf); 622 } 623 624 /*% 625 * Return a string for the type. 626 */ 627 const char * 628 p_section(int section, int opcode) { 629 const struct res_sym *symbols; 630 631 switch (opcode) { 632 case ns_o_update: 633 symbols = __p_update_section_syms; 634 break; 635 default: 636 symbols = __p_default_section_syms; 637 break; 638 } 639 return (sym_ntos(symbols, section, (int *)0)); 640 } 641 642 /*% 643 * Return a mnemonic for class. 644 */ 645 const char * 646 p_class(int class) { 647 int success; 648 const char *result; 649 static char classbuf[20]; 650 651 result = sym_ntos(__p_class_syms, class, &success); 652 if (success) 653 return (result); 654 if (class < 0 || class > 0xffff) 655 return ("BADCLASS"); 656 sprintf(classbuf, "CLASS%d", class); 657 return (classbuf); 658 } 659 660 /*% 661 * Return a mnemonic for an option 662 */ 663 const char * 664 p_option(u_long option) { 665 char *nbuf = p_option_nbuf; 666 667 switch (option) { 668 case RES_INIT: return "init"; 669 case RES_DEBUG: return "debug"; 670 case RES_AAONLY: return "aaonly(unimpl)"; 671 case RES_USEVC: return "usevc"; 672 case RES_PRIMARY: return "primry(unimpl)"; 673 case RES_IGNTC: return "igntc"; 674 case RES_RECURSE: return "recurs"; 675 case RES_DEFNAMES: return "defnam"; 676 case RES_STAYOPEN: return "styopn"; 677 case RES_DNSRCH: return "dnsrch"; 678 case RES_INSECURE1: return "insecure1"; 679 case RES_INSECURE2: return "insecure2"; 680 case RES_NOALIASES: return "noaliases"; 681 case RES_USE_INET6: return "inet6"; 682 #ifdef RES_USE_EDNS0 /*%< KAME extension */ 683 case RES_USE_EDNS0: return "edns0"; 684 case RES_NSID: return "nsid"; 685 #endif 686 #ifdef RES_USE_DNAME 687 case RES_USE_DNAME: return "dname"; 688 #endif 689 #ifdef RES_USE_DNSSEC 690 case RES_USE_DNSSEC: return "dnssec"; 691 #endif 692 #ifdef RES_NOTLDQUERY 693 case RES_NOTLDQUERY: return "no-tld-query"; 694 #endif 695 #ifdef RES_NO_NIBBLE2 696 case RES_NO_NIBBLE2: return "no-nibble2"; 697 #endif 698 /* XXX nonreentrant */ 699 default: sprintf(nbuf, "?0x%lx?", (u_long)option); 700 return (nbuf); 701 } 702 } 703 704 /*% 705 * Return a mnemonic for a time to live. 706 */ 707 const char * 708 p_time(u_int32_t value) { 709 char *nbuf = p_time_nbuf; 710 711 if (ns_format_ttl((u_long)value, nbuf, sizeof nbuf) < 0) 712 sprintf(nbuf, "%u", value); 713 return (nbuf); 714 } 715 716 /*% 717 * Return a string for the rcode. 718 */ 719 const char * 720 p_rcode(int rcode) { 721 return (sym_ntos(__p_rcode_syms, rcode, (int *)0)); 722 } 723 724 /*% 725 * Return a string for a res_sockaddr_union. 726 */ 727 const char * 728 p_sockun(union res_sockaddr_union u, char *buf, size_t size) { 729 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"]; 730 731 switch (u.sin.sin_family) { 732 case AF_INET: 733 inet_ntop(AF_INET, &u.sin.sin_addr, ret, sizeof ret); 734 break; 735 #ifdef HAS_INET6_STRUCTS 736 case AF_INET6: 737 inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret); 738 break; 739 #endif 740 default: 741 sprintf(ret, "[af%d]", u.sin.sin_family); 742 break; 743 } 744 if (size > 0U) { 745 strncpy(buf, ret, size - 1); 746 buf[size - 1] = '0'; 747 } 748 return (buf); 749 } 750 751 /*% 752 * routines to convert between on-the-wire RR format and zone file format. 753 * Does not contain conversion to/from decimal degrees; divide or multiply 754 * by 60*60*1000 for that. 755 */ 756 757 static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000, 758 1000000,10000000,100000000,1000000000}; 759 760 /*% takes an XeY precision/size value, returns a string representation. */ 761 static const char * 762 precsize_ntoa(u_int32_t prec) 763 { 764 char *retbuf = precsize_ntoa_retbuf; 765 unsigned long val; 766 int mantissa, exponent; 767 768 mantissa = (int)((prec >> 4) & 0x0f) % 10; 769 exponent = (int)((prec >> 0) & 0x0f) % 10; 770 771 val = mantissa * poweroften[exponent]; 772 773 (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100); 774 return (retbuf); 775 } 776 777 /*% converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */ 778 static u_int8_t 779 precsize_aton(const char **strptr) { 780 unsigned int mval = 0, cmval = 0; 781 u_int8_t retval = 0; 782 const char *cp; 783 int exponent; 784 int mantissa; 785 786 cp = *strptr; 787 788 while (isdigit((unsigned char)*cp)) 789 mval = mval * 10 + (*cp++ - '0'); 790 791 if (*cp == '.') { /*%< centimeters */ 792 cp++; 793 if (isdigit((unsigned char)*cp)) { 794 cmval = (*cp++ - '0') * 10; 795 if (isdigit((unsigned char)*cp)) { 796 cmval += (*cp++ - '0'); 797 } 798 } 799 } 800 cmval = (mval * 100) + cmval; 801 802 for (exponent = 0; exponent < 9; exponent++) 803 if (cmval < poweroften[exponent+1]) 804 break; 805 806 mantissa = cmval / poweroften[exponent]; 807 if (mantissa > 9) 808 mantissa = 9; 809 810 retval = (mantissa << 4) | exponent; 811 812 *strptr = cp; 813 814 return (retval); 815 } 816 817 /*% converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */ 818 static u_int32_t 819 latlon2ul(const char **latlonstrptr, int *which) { 820 const char *cp; 821 u_int32_t retval; 822 int deg = 0, min = 0, secs = 0, secsfrac = 0; 823 824 cp = *latlonstrptr; 825 826 while (isdigit((unsigned char)*cp)) 827 deg = deg * 10 + (*cp++ - '0'); 828 829 while (isspace((unsigned char)*cp)) 830 cp++; 831 832 if (!(isdigit((unsigned char)*cp))) 833 goto fndhemi; 834 835 while (isdigit((unsigned char)*cp)) 836 min = min * 10 + (*cp++ - '0'); 837 838 while (isspace((unsigned char)*cp)) 839 cp++; 840 841 if (!(isdigit((unsigned char)*cp))) 842 goto fndhemi; 843 844 while (isdigit((unsigned char)*cp)) 845 secs = secs * 10 + (*cp++ - '0'); 846 847 if (*cp == '.') { /*%< decimal seconds */ 848 cp++; 849 if (isdigit((unsigned char)*cp)) { 850 secsfrac = (*cp++ - '0') * 100; 851 if (isdigit((unsigned char)*cp)) { 852 secsfrac += (*cp++ - '0') * 10; 853 if (isdigit((unsigned char)*cp)) { 854 secsfrac += (*cp++ - '0'); 855 } 856 } 857 } 858 } 859 860 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 861 cp++; 862 863 while (isspace((unsigned char)*cp)) 864 cp++; 865 866 fndhemi: 867 switch (*cp) { 868 case 'N': case 'n': 869 case 'E': case 'e': 870 retval = ((unsigned)1<<31) 871 + (((((deg * 60) + min) * 60) + secs) * 1000) 872 + secsfrac; 873 break; 874 case 'S': case 's': 875 case 'W': case 'w': 876 retval = ((unsigned)1<<31) 877 - (((((deg * 60) + min) * 60) + secs) * 1000) 878 - secsfrac; 879 break; 880 default: 881 retval = 0; /*%< invalid value -- indicates error */ 882 break; 883 } 884 885 switch (*cp) { 886 case 'N': case 'n': 887 case 'S': case 's': 888 *which = 1; /*%< latitude */ 889 break; 890 case 'E': case 'e': 891 case 'W': case 'w': 892 *which = 2; /*%< longitude */ 893 break; 894 default: 895 *which = 0; /*%< error */ 896 break; 897 } 898 899 cp++; /*%< skip the hemisphere */ 900 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 901 cp++; 902 903 while (isspace((unsigned char)*cp)) /*%< move to next field */ 904 cp++; 905 906 *latlonstrptr = cp; 907 908 return (retval); 909 } 910 911 /*% 912 * converts a zone file representation in a string to an RDATA on-the-wire 913 * representation. */ 914 int 915 loc_aton(ascii, binary) 916 const char *ascii; 917 u_char *binary; 918 { 919 const char *cp, *maxcp; 920 u_char *bcp; 921 922 u_int32_t latit = 0, longit = 0, alt = 0; 923 u_int32_t lltemp1 = 0, lltemp2 = 0; 924 int altmeters = 0, altfrac = 0, altsign = 1; 925 u_int8_t hp = 0x16; /*%< default = 1e6 cm = 10000.00m = 10km */ 926 u_int8_t vp = 0x13; /*%< default = 1e3 cm = 10.00m */ 927 u_int8_t siz = 0x12; /*%< default = 1e2 cm = 1.00m */ 928 int which1 = 0, which2 = 0; 929 930 cp = ascii; 931 maxcp = cp + strlen(ascii); 932 933 lltemp1 = latlon2ul(&cp, &which1); 934 935 lltemp2 = latlon2ul(&cp, &which2); 936 937 switch (which1 + which2) { 938 case 3: /*%< 1 + 2, the only valid combination */ 939 if ((which1 == 1) && (which2 == 2)) { /*%< normal case */ 940 latit = lltemp1; 941 longit = lltemp2; 942 } else if ((which1 == 2) && (which2 == 1)) { /*%< reversed */ 943 longit = lltemp1; 944 latit = lltemp2; 945 } else { /*%< some kind of brokenness */ 946 return (0); 947 } 948 break; 949 default: /*%< we didn't get one of each */ 950 return (0); 951 } 952 953 /* altitude */ 954 if (*cp == '-') { 955 altsign = -1; 956 cp++; 957 } 958 959 if (*cp == '+') 960 cp++; 961 962 while (isdigit((unsigned char)*cp)) 963 altmeters = altmeters * 10 + (*cp++ - '0'); 964 965 if (*cp == '.') { /*%< decimal meters */ 966 cp++; 967 if (isdigit((unsigned char)*cp)) { 968 altfrac = (*cp++ - '0') * 10; 969 if (isdigit((unsigned char)*cp)) { 970 altfrac += (*cp++ - '0'); 971 } 972 } 973 } 974 975 alt = (10000000 + (altsign * (altmeters * 100 + altfrac))); 976 977 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 978 cp++; 979 980 while (isspace((unsigned char)*cp) && (cp < maxcp)) 981 cp++; 982 983 if (cp >= maxcp) 984 goto defaults; 985 986 siz = precsize_aton(&cp); 987 988 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 989 cp++; 990 991 while (isspace((unsigned char)*cp) && (cp < maxcp)) 992 cp++; 993 994 if (cp >= maxcp) 995 goto defaults; 996 997 hp = precsize_aton(&cp); 998 999 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 1000 cp++; 1001 1002 while (isspace((unsigned char)*cp) && (cp < maxcp)) 1003 cp++; 1004 1005 if (cp >= maxcp) 1006 goto defaults; 1007 1008 vp = precsize_aton(&cp); 1009 1010 defaults: 1011 1012 bcp = binary; 1013 *bcp++ = (u_int8_t) 0; /*%< version byte */ 1014 *bcp++ = siz; 1015 *bcp++ = hp; 1016 *bcp++ = vp; 1017 PUTLONG(latit,bcp); 1018 PUTLONG(longit,bcp); 1019 PUTLONG(alt,bcp); 1020 1021 return (16); /*%< size of RR in octets */ 1022 } 1023 1024 /*% takes an on-the-wire LOC RR and formats it in a human readable format. */ 1025 const char * 1026 loc_ntoa(binary, ascii) 1027 const u_char *binary; 1028 char *ascii; 1029 { 1030 static const char *error = "?"; 1031 static char tmpbuf[sizeof 1032 "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"]; 1033 const u_char *cp = binary; 1034 1035 int latdeg, latmin, latsec, latsecfrac; 1036 int longdeg, longmin, longsec, longsecfrac; 1037 char northsouth, eastwest; 1038 const char *altsign; 1039 int altmeters, altfrac; 1040 1041 const u_int32_t referencealt = 100000 * 100; 1042 1043 int32_t latval, longval, altval; 1044 u_int32_t templ; 1045 u_int8_t sizeval, hpval, vpval, versionval; 1046 1047 char *sizestr, *hpstr, *vpstr; 1048 1049 versionval = *cp++; 1050 1051 if (ascii == NULL) 1052 ascii = tmpbuf; 1053 1054 if (versionval) { 1055 (void) sprintf(ascii, "; error: unknown LOC RR version"); 1056 return (ascii); 1057 } 1058 1059 sizeval = *cp++; 1060 1061 hpval = *cp++; 1062 vpval = *cp++; 1063 1064 GETLONG(templ, cp); 1065 latval = (templ - ((unsigned)1<<31)); 1066 1067 GETLONG(templ, cp); 1068 longval = (templ - ((unsigned)1<<31)); 1069 1070 GETLONG(templ, cp); 1071 if (templ < referencealt) { /*%< below WGS 84 spheroid */ 1072 altval = referencealt - templ; 1073 altsign = "-"; 1074 } else { 1075 altval = templ - referencealt; 1076 altsign = ""; 1077 } 1078 1079 if (latval < 0) { 1080 northsouth = 'S'; 1081 latval = -latval; 1082 } else 1083 northsouth = 'N'; 1084 1085 latsecfrac = latval % 1000; 1086 latval = latval / 1000; 1087 latsec = latval % 60; 1088 latval = latval / 60; 1089 latmin = latval % 60; 1090 latval = latval / 60; 1091 latdeg = latval; 1092 1093 if (longval < 0) { 1094 eastwest = 'W'; 1095 longval = -longval; 1096 } else 1097 eastwest = 'E'; 1098 1099 longsecfrac = longval % 1000; 1100 longval = longval / 1000; 1101 longsec = longval % 60; 1102 longval = longval / 60; 1103 longmin = longval % 60; 1104 longval = longval / 60; 1105 longdeg = longval; 1106 1107 altfrac = altval % 100; 1108 altmeters = (altval / 100); 1109 1110 sizestr = strdup(precsize_ntoa((u_int32_t)sizeval)); 1111 hpstr = strdup(precsize_ntoa((u_int32_t)hpval)); 1112 vpstr = strdup(precsize_ntoa((u_int32_t)vpval)); 1113 1114 sprintf(ascii, 1115 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm", 1116 latdeg, latmin, latsec, latsecfrac, northsouth, 1117 longdeg, longmin, longsec, longsecfrac, eastwest, 1118 altsign, altmeters, altfrac, 1119 (sizestr != NULL) ? sizestr : error, 1120 (hpstr != NULL) ? hpstr : error, 1121 (vpstr != NULL) ? vpstr : error); 1122 1123 if (sizestr != NULL) 1124 free(sizestr); 1125 if (hpstr != NULL) 1126 free(hpstr); 1127 if (vpstr != NULL) 1128 free(vpstr); 1129 1130 return (ascii); 1131 } 1132 1133 1134 /*% Return the number of DNS hierarchy levels in the name. */ 1135 int 1136 dn_count_labels(const char *name) { 1137 int i, len, count; 1138 1139 len = strlen(name); 1140 for (i = 0, count = 0; i < len; i++) { 1141 /* XXX need to check for \. or use named's nlabels(). */ 1142 if (name[i] == '.') 1143 count++; 1144 } 1145 1146 /* don't count initial wildcard */ 1147 if (name[0] == '*') 1148 if (count) 1149 count--; 1150 1151 /* don't count the null label for root. */ 1152 /* if terminating '.' not found, must adjust */ 1153 /* count to include last label */ 1154 if (len > 0 && name[len-1] != '.') 1155 count++; 1156 return (count); 1157 } 1158 1159 /*% 1160 * Make dates expressed in seconds-since-Jan-1-1970 easy to read. 1161 * SIG records are required to be printed like this, by the Secure DNS RFC. 1162 */ 1163 char * 1164 p_secstodate (u_long secs) { 1165 /* XXX nonreentrant */ 1166 char *output = p_secstodate_output; 1167 time_t myclock = secs; 1168 struct tm *mytime; 1169 #ifdef HAVE_TIME_R 1170 struct tm res; 1171 1172 mytime = gmtime_r(&myclock, &res); 1173 #else 1174 mytime = gmtime(&myclock); 1175 #endif 1176 mytime->tm_year += 1900; 1177 mytime->tm_mon += 1; 1178 sprintf(output, "%04d%02d%02d%02d%02d%02d", 1179 mytime->tm_year, mytime->tm_mon, mytime->tm_mday, 1180 mytime->tm_hour, mytime->tm_min, mytime->tm_sec); 1181 return (output); 1182 } 1183 1184 u_int16_t 1185 res_nametoclass(const char *buf, int *successp) { 1186 unsigned long result; 1187 char *endptr; 1188 int success; 1189 1190 result = sym_ston(__p_class_syms, buf, &success); 1191 if (success) 1192 goto done; 1193 1194 if (strncasecmp(buf, "CLASS", 5) != 0 || 1195 !isdigit((unsigned char)buf[5])) 1196 goto done; 1197 errno = 0; 1198 result = strtoul(buf + 5, &endptr, 10); 1199 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1200 success = 1; 1201 done: 1202 if (successp) 1203 *successp = success; 1204 return (u_int16_t)(result); 1205 } 1206 1207 u_int16_t 1208 res_nametotype(const char *buf, int *successp) { 1209 unsigned long result; 1210 char *endptr; 1211 int success; 1212 1213 result = sym_ston(__p_type_syms, buf, &success); 1214 if (success) 1215 goto done; 1216 1217 if (strncasecmp(buf, "type", 4) != 0 || 1218 !isdigit((unsigned char)buf[4])) 1219 goto done; 1220 errno = 0; 1221 result = strtoul(buf + 4, &endptr, 10); 1222 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1223 success = 1; 1224 done: 1225 if (successp) 1226 *successp = success; 1227 return (u_int16_t)(result); 1228 } 1229 1230 /*! \file */ 1231