res_debug.c revision 1.7
1 /* $NetBSD: res_debug.c,v 1.7 2004/11/07 02:25:01 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 1.3.2.5.4.5 2004/07/28 20:16:46 marka Exp"; 103 #else 104 __RCSID("$NetBSD: res_debug.c,v 1.7 2004/11/07 02:25:01 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 <stdio.h> 125 #include <stdlib.h> 126 #include <string.h> 127 #include <time.h> 128 129 #include "port_after.h" 130 131 #ifdef SPRINTF_CHAR 132 # define SPRINTF(x) strlen(sprintf/**/x) 133 #else 134 # define SPRINTF(x) sprintf x 135 #endif 136 137 static const char *precsize_ntoa(u_int32_t); 138 139 extern const char *_res_opcodes[]; 140 extern const char *_res_sectioncodes[]; 141 142 #if 0 143 #ifdef __weak_alias 144 __weak_alias(res_pquery,__res_pquery) 145 __weak_alias(res_nametoclass,__res_nametoclass) 146 __weak_alias(res_nametotype,__res_nametotype) 147 #endif 148 #endif 149 150 #ifndef _LIBC 151 /* 152 * Print the current options. 153 */ 154 void 155 fp_resstat(const res_state statp, FILE *file) { 156 u_long mask; 157 158 fprintf(file, ";; res options:"); 159 for (mask = 1; mask != 0U; mask <<= 1) 160 if (statp->options & mask) 161 fprintf(file, " %s", p_option(mask)); 162 putc('\n', file); 163 } 164 #endif 165 166 static void 167 do_section(const res_state statp, 168 ns_msg *handle, ns_sect section, 169 int pflag, FILE *file) 170 { 171 int n, sflag, rrnum; 172 static int buflen = 2048; 173 char *buf; 174 ns_opcode opcode; 175 ns_rr rr; 176 177 /* 178 * Print answer records. 179 */ 180 sflag = (statp->pfcode & pflag); 181 if (statp->pfcode && !sflag) 182 return; 183 184 buf = malloc((size_t)buflen); 185 if (buf == NULL) { 186 fprintf(file, ";; memory allocation failure\n"); 187 return; 188 } 189 190 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode); 191 rrnum = 0; 192 for (;;) { 193 if (ns_parserr(handle, section, rrnum, &rr)) { 194 if (errno != ENODEV) 195 fprintf(file, ";; ns_parserr: %s\n", 196 strerror(errno)); 197 else if (rrnum > 0 && sflag != 0 && 198 (statp->pfcode & RES_PRF_HEAD1)) 199 putc('\n', file); 200 goto cleanup; 201 } 202 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1)) 203 fprintf(file, ";; %s SECTION:\n", 204 p_section(section, opcode)); 205 if (section == ns_s_qd) 206 fprintf(file, ";;\t%s, type = %s, class = %s\n", 207 ns_rr_name(rr), 208 p_type(ns_rr_type(rr)), 209 p_class(ns_rr_class(rr))); 210 else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) { 211 u_int32_t ttl = ns_rr_ttl(rr); 212 fprintf(file, 213 "; EDNS: version: %u, udp=%u, flags=%04x\n", 214 (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff); 215 } else { 216 n = ns_sprintrr(handle, &rr, NULL, NULL, 217 buf, (u_int)buflen); 218 if (n < 0) { 219 if (errno == ENOSPC) { 220 free(buf); 221 buf = NULL; 222 if (buflen < 131072) 223 buf = malloc((size_t)(buflen += 1024)); 224 if (buf == NULL) { 225 fprintf(file, 226 ";; memory allocation failure\n"); 227 return; 228 } 229 continue; 230 } 231 fprintf(file, ";; ns_sprintrr: %s\n", 232 strerror(errno)); 233 goto cleanup; 234 } 235 fputs(buf, file); 236 fputc('\n', file); 237 } 238 rrnum++; 239 } 240 cleanup: 241 if (buf != NULL) 242 free(buf); 243 } 244 245 /* 246 * Print the contents of a query. 247 * This is intended to be primarily a debugging routine. 248 */ 249 void 250 res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) { 251 ns_msg handle; 252 int qdcount, ancount, nscount, arcount; 253 u_int opcode, rcode, id; 254 255 if (ns_initparse(msg, len, &handle) < 0) { 256 fprintf(file, ";; ns_initparse: %s\n", strerror(errno)); 257 return; 258 } 259 opcode = ns_msg_getflag(handle, ns_f_opcode); 260 rcode = ns_msg_getflag(handle, ns_f_rcode); 261 id = ns_msg_id(handle); 262 qdcount = ns_msg_count(handle, ns_s_qd); 263 ancount = ns_msg_count(handle, ns_s_an); 264 nscount = ns_msg_count(handle, ns_s_ns); 265 arcount = ns_msg_count(handle, ns_s_ar); 266 267 /* 268 * Print header fields. 269 */ 270 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode) 271 fprintf(file, 272 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n", 273 _res_opcodes[opcode], p_rcode((int)rcode), id); 274 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX)) 275 putc(';', file); 276 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) { 277 fprintf(file, "; flags:"); 278 if (ns_msg_getflag(handle, ns_f_qr)) 279 fprintf(file, " qr"); 280 if (ns_msg_getflag(handle, ns_f_aa)) 281 fprintf(file, " aa"); 282 if (ns_msg_getflag(handle, ns_f_tc)) 283 fprintf(file, " tc"); 284 if (ns_msg_getflag(handle, ns_f_rd)) 285 fprintf(file, " rd"); 286 if (ns_msg_getflag(handle, ns_f_ra)) 287 fprintf(file, " ra"); 288 if (ns_msg_getflag(handle, ns_f_z)) 289 fprintf(file, " ??"); 290 if (ns_msg_getflag(handle, ns_f_ad)) 291 fprintf(file, " ad"); 292 if (ns_msg_getflag(handle, ns_f_cd)) 293 fprintf(file, " cd"); 294 } 295 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) { 296 fprintf(file, "; %s: %d", 297 p_section(ns_s_qd, (int)opcode), qdcount); 298 fprintf(file, ", %s: %d", 299 p_section(ns_s_an, (int)opcode), ancount); 300 fprintf(file, ", %s: %d", 301 p_section(ns_s_ns, (int)opcode), nscount); 302 fprintf(file, ", %s: %d", 303 p_section(ns_s_ar, (int)opcode), arcount); 304 } 305 if ((!statp->pfcode) || (statp->pfcode & 306 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) { 307 putc('\n',file); 308 } 309 /* 310 * Print the various sections. 311 */ 312 do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file); 313 do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file); 314 do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file); 315 do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file); 316 if (qdcount == 0 && ancount == 0 && 317 nscount == 0 && arcount == 0) 318 putc('\n', file); 319 } 320 321 const u_char * 322 p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) { 323 char name[MAXDNAME]; 324 int n; 325 326 if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0) 327 return (NULL); 328 if (name[0] == '\0') 329 putc('.', file); 330 else 331 fputs(name, file); 332 return (cp + n); 333 } 334 335 const u_char * 336 p_cdname(const u_char *cp, const u_char *msg, FILE *file) { 337 return (p_cdnname(cp, msg, PACKETSZ, file)); 338 } 339 340 /* Return a fully-qualified domain name from a compressed name (with 341 length supplied). */ 342 343 const u_char * 344 p_fqnname(cp, msg, msglen, name, namelen) 345 const u_char *cp, *msg; 346 int msglen; 347 char *name; 348 int namelen; 349 { 350 int n, newlen; 351 352 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0) 353 return (NULL); 354 newlen = strlen(name); 355 if (newlen == 0 || name[newlen - 1] != '.') { 356 if (newlen + 1 >= namelen) /* Lack space for final dot */ 357 return (NULL); 358 else 359 strcpy(name + newlen, "."); 360 } 361 return (cp + n); 362 } 363 364 /* XXX: the rest of these functions need to become length-limited, too. */ 365 366 const u_char * 367 p_fqname(const u_char *cp, const u_char *msg, FILE *file) { 368 char name[MAXDNAME]; 369 const u_char *n; 370 371 n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name); 372 if (n == NULL) 373 return (NULL); 374 fputs(name, file); 375 return (n); 376 } 377 378 /* 379 * Names of RR classes and qclasses. Classes and qclasses are the same, except 380 * that C_ANY is a qclass but not a class. (You can ask for records of class 381 * C_ANY, but you can't have any records of that class in the database.) 382 */ 383 const struct res_sym __p_class_syms[] = { 384 {C_IN, "IN", (char *)0}, 385 {C_CHAOS, "CH", (char *)0}, 386 {C_CHAOS, "CHAOS", (char *)0}, 387 {C_HS, "HS", (char *)0}, 388 {C_HS, "HESIOD", (char *)0}, 389 {C_ANY, "ANY", (char *)0}, 390 {C_NONE, "NONE", (char *)0}, 391 {C_IN, (char *)0, (char *)0} 392 }; 393 394 /* 395 * Names of message sections. 396 */ 397 const struct res_sym __p_default_section_syms[] = { 398 {ns_s_qd, "QUERY", (char *)0}, 399 {ns_s_an, "ANSWER", (char *)0}, 400 {ns_s_ns, "AUTHORITY", (char *)0}, 401 {ns_s_ar, "ADDITIONAL", (char *)0}, 402 {0, (char *)0, (char *)0} 403 }; 404 405 const struct res_sym __p_update_section_syms[] = { 406 {S_ZONE, "ZONE", (char *)0}, 407 {S_PREREQ, "PREREQUISITE", (char *)0}, 408 {S_UPDATE, "UPDATE", (char *)0}, 409 {S_ADDT, "ADDITIONAL", (char *)0}, 410 {0, (char *)0, (char *)0} 411 }; 412 413 const struct res_sym __p_key_syms[] = { 414 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"}, 415 {NS_ALG_DH, "DH", "Diffie Hellman"}, 416 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"}, 417 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"}, 418 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"}, 419 {0, NULL, NULL} 420 }; 421 422 const struct res_sym __p_cert_syms[] = { 423 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"}, 424 {cert_t_spki, "SPKI", "SPKI certificate"}, 425 {cert_t_pgp, "PGP", "PGP certificate"}, 426 {cert_t_url, "URL", "URL Private"}, 427 {cert_t_oid, "OID", "OID Private"}, 428 {0, NULL, NULL} 429 }; 430 431 /* 432 * Names of RR types and qtypes. Types and qtypes are the same, except 433 * that T_ANY is a qtype but not a type. (You can ask for records of type 434 * T_ANY, but you can't have any records of that type in the database.) 435 */ 436 const struct res_sym __p_type_syms[] = { 437 {ns_t_a, "A", "address"}, 438 {ns_t_ns, "NS", "name server"}, 439 {ns_t_md, "MD", "mail destination (deprecated)"}, 440 {ns_t_mf, "MF", "mail forwarder (deprecated)"}, 441 {ns_t_cname, "CNAME", "canonical name"}, 442 {ns_t_soa, "SOA", "start of authority"}, 443 {ns_t_mb, "MB", "mailbox"}, 444 {ns_t_mg, "MG", "mail group member"}, 445 {ns_t_mr, "MR", "mail rename"}, 446 {ns_t_null, "NULL", "null"}, 447 {ns_t_wks, "WKS", "well-known service (deprecated)"}, 448 {ns_t_ptr, "PTR", "domain name pointer"}, 449 {ns_t_hinfo, "HINFO", "host information"}, 450 {ns_t_minfo, "MINFO", "mailbox information"}, 451 {ns_t_mx, "MX", "mail exchanger"}, 452 {ns_t_txt, "TXT", "text"}, 453 {ns_t_rp, "RP", "responsible person"}, 454 {ns_t_afsdb, "AFSDB", "DCE or AFS server"}, 455 {ns_t_x25, "X25", "X25 address"}, 456 {ns_t_isdn, "ISDN", "ISDN address"}, 457 {ns_t_rt, "RT", "router"}, 458 {ns_t_nsap, "NSAP", "nsap address"}, 459 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"}, 460 {ns_t_sig, "SIG", "signature"}, 461 {ns_t_key, "KEY", "key"}, 462 {ns_t_px, "PX", "mapping information"}, 463 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"}, 464 {ns_t_aaaa, "AAAA", "IPv6 address"}, 465 {ns_t_loc, "LOC", "location"}, 466 {ns_t_nxt, "NXT", "next valid name (unimplemented)"}, 467 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"}, 468 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"}, 469 {ns_t_srv, "SRV", "server selection"}, 470 {ns_t_atma, "ATMA", "ATM address (unimplemented)"}, 471 {ns_t_tkey, "TKEY", "tkey"}, 472 {ns_t_tsig, "TSIG", "transaction signature"}, 473 {ns_t_ixfr, "IXFR", "incremental zone transfer"}, 474 {ns_t_axfr, "AXFR", "zone transfer"}, 475 {ns_t_zxfr, "ZXFR", "compressed zone transfer"}, 476 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"}, 477 {ns_t_maila, "MAILA", "mail agent (deprecated)"}, 478 {ns_t_naptr, "NAPTR", "URN Naming Authority"}, 479 {ns_t_kx, "KX", "Key Exchange"}, 480 {ns_t_cert, "CERT", "Certificate"}, 481 {ns_t_a6, "A6", "IPv6 Address"}, 482 {ns_t_dname, "DNAME", "dname"}, 483 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"}, 484 {ns_t_opt, "OPT", "EDNS Options"}, 485 {ns_t_any, "ANY", "\"any\""}, 486 {0, NULL, NULL} 487 }; 488 489 /* 490 * Names of DNS rcodes. 491 */ 492 const struct res_sym __p_rcode_syms[] = { 493 {ns_r_noerror, "NOERROR", "no error"}, 494 {ns_r_formerr, "FORMERR", "format error"}, 495 {ns_r_servfail, "SERVFAIL", "server failed"}, 496 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"}, 497 {ns_r_notimpl, "NOTIMP", "not implemented"}, 498 {ns_r_refused, "REFUSED", "refused"}, 499 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"}, 500 {ns_r_yxrrset, "YXRRSET", "rrset exists"}, 501 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"}, 502 {ns_r_notauth, "NOTAUTH", "not authoritative"}, 503 {ns_r_notzone, "NOTZONE", "Not in zone"}, 504 {ns_r_max, "", ""}, 505 {ns_r_badsig, "BADSIG", "bad signature"}, 506 {ns_r_badkey, "BADKEY", "bad key"}, 507 {ns_r_badtime, "BADTIME", "bad time"}, 508 {0, NULL, NULL} 509 }; 510 511 int 512 sym_ston(const struct res_sym *syms, const char *name, int *success) { 513 for (; syms->name != 0; syms++) { 514 if (strcasecmp (name, syms->name) == 0) { 515 if (success) 516 *success = 1; 517 return (syms->number); 518 } 519 } 520 if (success) 521 *success = 0; 522 return (syms->number); /* The default value. */ 523 } 524 525 const char * 526 sym_ntos(const struct res_sym *syms, int number, int *success) { 527 static char unname[20]; 528 529 for (; syms->name != 0; syms++) { 530 if (number == syms->number) { 531 if (success) 532 *success = 1; 533 return (syms->name); 534 } 535 } 536 537 sprintf(unname, "%d", number); /* XXX nonreentrant */ 538 if (success) 539 *success = 0; 540 return (unname); 541 } 542 543 const char * 544 sym_ntop(const struct res_sym *syms, int number, int *success) { 545 static char unname[20]; 546 547 for (; syms->name != 0; syms++) { 548 if (number == syms->number) { 549 if (success) 550 *success = 1; 551 return (syms->humanname); 552 } 553 } 554 sprintf(unname, "%d", number); /* XXX nonreentrant */ 555 if (success) 556 *success = 0; 557 return (unname); 558 } 559 560 /* 561 * Return a string for the type. 562 */ 563 const char * 564 p_type(int type) { 565 int success; 566 const char *result; 567 static char typebuf[20]; 568 569 result = sym_ntos(__p_type_syms, type, &success); 570 if (success) 571 return (result); 572 if (type < 0 || type > 0xffff) 573 return ("BADTYPE"); 574 sprintf(typebuf, "TYPE%d", type); 575 return (typebuf); 576 } 577 578 /* 579 * Return a string for the type. 580 */ 581 const char * 582 p_section(int section, int opcode) { 583 const struct res_sym *symbols; 584 585 switch (opcode) { 586 case ns_o_update: 587 symbols = __p_update_section_syms; 588 break; 589 default: 590 symbols = __p_default_section_syms; 591 break; 592 } 593 return (sym_ntos(symbols, section, (int *)0)); 594 } 595 596 /* 597 * Return a mnemonic for class. 598 */ 599 const char * 600 p_class(int class) { 601 int success; 602 const char *result; 603 static char classbuf[20]; 604 605 result = sym_ntos(__p_class_syms, class, &success); 606 if (success) 607 return (result); 608 if (class < 0 || class > 0xffff) 609 return ("BADCLASS"); 610 sprintf(classbuf, "CLASS%d", class); 611 return (classbuf); 612 } 613 614 /* 615 * Return a mnemonic for an option 616 */ 617 const char * 618 p_option(u_long option) { 619 static char nbuf[40]; 620 621 switch (option) { 622 case RES_INIT: return "init"; 623 case RES_DEBUG: return "debug"; 624 case RES_AAONLY: return "aaonly(unimpl)"; 625 case RES_USEVC: return "usevc"; 626 case RES_PRIMARY: return "primry(unimpl)"; 627 case RES_IGNTC: return "igntc"; 628 case RES_RECURSE: return "recurs"; 629 case RES_DEFNAMES: return "defnam"; 630 case RES_STAYOPEN: return "styopn"; 631 case RES_DNSRCH: return "dnsrch"; 632 case RES_INSECURE1: return "insecure1"; 633 case RES_INSECURE2: return "insecure2"; 634 case RES_NOALIASES: return "noaliases"; 635 case RES_USE_INET6: return "inet6"; 636 #ifdef RES_USE_EDNS0 /* KAME extension */ 637 case RES_USE_EDNS0: return "edns0"; 638 #endif 639 #ifdef RES_USE_DNAME 640 case RES_USE_DNAME: return "dname"; 641 #endif 642 #ifdef RES_USE_DNSSEC 643 case RES_USE_DNSSEC: return "dnssec"; 644 #endif 645 #ifdef RES_NOTLDQUERY 646 case RES_NOTLDQUERY: return "no-tld-query"; 647 #endif 648 #ifdef RES_NO_NIBBLE2 649 case RES_NO_NIBBLE2: return "no-nibble2"; 650 #endif 651 /* XXX nonreentrant */ 652 default: sprintf(nbuf, "?0x%lx?", (u_long)option); 653 return (nbuf); 654 } 655 } 656 657 /* 658 * Return a mnemonic for a time to live. 659 */ 660 const char * 661 p_time(u_int32_t value) { 662 static char nbuf[40]; /* XXX nonreentrant */ 663 664 if (ns_format_ttl((u_long)value, nbuf, sizeof nbuf) < 0) 665 sprintf(nbuf, "%u", value); 666 return (nbuf); 667 } 668 669 /* 670 * Return a string for the rcode. 671 */ 672 const char * 673 p_rcode(int rcode) { 674 return (sym_ntos(__p_rcode_syms, rcode, (int *)0)); 675 } 676 677 /* 678 * Return a string for a res_sockaddr_union. 679 */ 680 const char * 681 p_sockun(union res_sockaddr_union u, char *buf, size_t size) { 682 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"]; 683 684 switch (u.sin.sin_family) { 685 case AF_INET: 686 inet_ntop(AF_INET, &u.sin.sin_addr, ret, sizeof ret); 687 break; 688 #ifdef HAS_INET6_STRUCTS 689 case AF_INET6: 690 inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret); 691 break; 692 #endif 693 default: 694 sprintf(ret, "[af%d]", u.sin.sin_family); 695 break; 696 } 697 if (size > 0U) { 698 strncpy(buf, ret, size - 1); 699 buf[size - 1] = '0'; 700 } 701 return (buf); 702 } 703 704 /* 705 * routines to convert between on-the-wire RR format and zone file format. 706 * Does not contain conversion to/from decimal degrees; divide or multiply 707 * by 60*60*1000 for that. 708 */ 709 710 static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000, 711 1000000,10000000,100000000,1000000000}; 712 713 /* takes an XeY precision/size value, returns a string representation. */ 714 static const char * 715 precsize_ntoa(prec) 716 u_int32_t prec; 717 { 718 static char retbuf[sizeof "90000000.00"]; /* XXX nonreentrant */ 719 unsigned long val; 720 int mantissa, exponent; 721 722 mantissa = (int)((prec >> 4) & 0x0f) % 10; 723 exponent = (int)((prec >> 0) & 0x0f) % 10; 724 725 val = mantissa * poweroften[exponent]; 726 727 (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100); 728 return (retbuf); 729 } 730 731 /* converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */ 732 static u_int8_t 733 precsize_aton(const char **strptr) { 734 unsigned int mval = 0, cmval = 0; 735 u_int8_t retval = 0; 736 const char *cp; 737 int exponent; 738 int mantissa; 739 740 cp = *strptr; 741 742 while (isdigit((unsigned char)*cp)) 743 mval = mval * 10 + (*cp++ - '0'); 744 745 if (*cp == '.') { /* centimeters */ 746 cp++; 747 if (isdigit((unsigned char)*cp)) { 748 cmval = (*cp++ - '0') * 10; 749 if (isdigit((unsigned char)*cp)) { 750 cmval += (*cp++ - '0'); 751 } 752 } 753 } 754 cmval = (mval * 100) + cmval; 755 756 for (exponent = 0; exponent < 9; exponent++) 757 if (cmval < poweroften[exponent+1]) 758 break; 759 760 mantissa = cmval / poweroften[exponent]; 761 if (mantissa > 9) 762 mantissa = 9; 763 764 retval = (mantissa << 4) | exponent; 765 766 *strptr = cp; 767 768 return (retval); 769 } 770 771 /* converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */ 772 static u_int32_t 773 latlon2ul(const char **latlonstrptr, int *which) { 774 const char *cp; 775 u_int32_t retval; 776 int deg = 0, min = 0, secs = 0, secsfrac = 0; 777 778 cp = *latlonstrptr; 779 780 while (isdigit((unsigned char)*cp)) 781 deg = deg * 10 + (*cp++ - '0'); 782 783 while (isspace((unsigned char)*cp)) 784 cp++; 785 786 if (!(isdigit((unsigned char)*cp))) 787 goto fndhemi; 788 789 while (isdigit((unsigned char)*cp)) 790 min = min * 10 + (*cp++ - '0'); 791 792 while (isspace((unsigned char)*cp)) 793 cp++; 794 795 if (!(isdigit((unsigned char)*cp))) 796 goto fndhemi; 797 798 while (isdigit((unsigned char)*cp)) 799 secs = secs * 10 + (*cp++ - '0'); 800 801 if (*cp == '.') { /* decimal seconds */ 802 cp++; 803 if (isdigit((unsigned char)*cp)) { 804 secsfrac = (*cp++ - '0') * 100; 805 if (isdigit((unsigned char)*cp)) { 806 secsfrac += (*cp++ - '0') * 10; 807 if (isdigit((unsigned char)*cp)) { 808 secsfrac += (*cp++ - '0'); 809 } 810 } 811 } 812 } 813 814 while (!isspace((unsigned char)*cp)) /* if any trailing garbage */ 815 cp++; 816 817 while (isspace((unsigned char)*cp)) 818 cp++; 819 820 fndhemi: 821 switch (*cp) { 822 case 'N': case 'n': 823 case 'E': case 'e': 824 retval = ((unsigned)1<<31) 825 + (((((deg * 60) + min) * 60) + secs) * 1000) 826 + secsfrac; 827 break; 828 case 'S': case 's': 829 case 'W': case 'w': 830 retval = ((unsigned)1<<31) 831 - (((((deg * 60) + min) * 60) + secs) * 1000) 832 - secsfrac; 833 break; 834 default: 835 retval = 0; /* invalid value -- indicates error */ 836 break; 837 } 838 839 switch (*cp) { 840 case 'N': case 'n': 841 case 'S': case 's': 842 *which = 1; /* latitude */ 843 break; 844 case 'E': case 'e': 845 case 'W': case 'w': 846 *which = 2; /* longitude */ 847 break; 848 default: 849 *which = 0; /* error */ 850 break; 851 } 852 853 cp++; /* skip the hemisphere */ 854 855 while (!isspace((unsigned char)*cp)) /* if any trailing garbage */ 856 cp++; 857 858 while (isspace((unsigned char)*cp)) /* move to next field */ 859 cp++; 860 861 *latlonstrptr = cp; 862 863 return (retval); 864 } 865 866 /* converts a zone file representation in a string to an RDATA on-the-wire 867 * representation. */ 868 int 869 loc_aton(ascii, binary) 870 const char *ascii; 871 u_char *binary; 872 { 873 const char *cp, *maxcp; 874 u_char *bcp; 875 876 u_int32_t latit = 0, longit = 0, alt = 0; 877 u_int32_t lltemp1 = 0, lltemp2 = 0; 878 int altmeters = 0, altfrac = 0, altsign = 1; 879 u_int8_t hp = 0x16; /* default = 1e6 cm = 10000.00m = 10km */ 880 u_int8_t vp = 0x13; /* default = 1e3 cm = 10.00m */ 881 u_int8_t siz = 0x12; /* default = 1e2 cm = 1.00m */ 882 int which1 = 0, which2 = 0; 883 884 cp = ascii; 885 maxcp = cp + strlen(ascii); 886 887 lltemp1 = latlon2ul(&cp, &which1); 888 889 lltemp2 = latlon2ul(&cp, &which2); 890 891 switch (which1 + which2) { 892 case 3: /* 1 + 2, the only valid combination */ 893 if ((which1 == 1) && (which2 == 2)) { /* normal case */ 894 latit = lltemp1; 895 longit = lltemp2; 896 } else if ((which1 == 2) && (which2 == 1)) { /* reversed */ 897 longit = lltemp1; 898 latit = lltemp2; 899 } else { /* some kind of brokenness */ 900 return (0); 901 } 902 break; 903 default: /* we didn't get one of each */ 904 return (0); 905 } 906 907 /* altitude */ 908 if (*cp == '-') { 909 altsign = -1; 910 cp++; 911 } 912 913 if (*cp == '+') 914 cp++; 915 916 while (isdigit((unsigned char)*cp)) 917 altmeters = altmeters * 10 + (*cp++ - '0'); 918 919 if (*cp == '.') { /* decimal meters */ 920 cp++; 921 if (isdigit((unsigned char)*cp)) { 922 altfrac = (*cp++ - '0') * 10; 923 if (isdigit((unsigned char)*cp)) { 924 altfrac += (*cp++ - '0'); 925 } 926 } 927 } 928 929 alt = (10000000 + (altsign * (altmeters * 100 + altfrac))); 930 931 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */ 932 cp++; 933 934 while (isspace((unsigned char)*cp) && (cp < maxcp)) 935 cp++; 936 937 if (cp >= maxcp) 938 goto defaults; 939 940 siz = precsize_aton(&cp); 941 942 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */ 943 cp++; 944 945 while (isspace((unsigned char)*cp) && (cp < maxcp)) 946 cp++; 947 948 if (cp >= maxcp) 949 goto defaults; 950 951 hp = precsize_aton(&cp); 952 953 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */ 954 cp++; 955 956 while (isspace((unsigned char)*cp) && (cp < maxcp)) 957 cp++; 958 959 if (cp >= maxcp) 960 goto defaults; 961 962 vp = precsize_aton(&cp); 963 964 defaults: 965 966 bcp = binary; 967 *bcp++ = (u_int8_t) 0; /* version byte */ 968 *bcp++ = siz; 969 *bcp++ = hp; 970 *bcp++ = vp; 971 PUTLONG(latit,bcp); 972 PUTLONG(longit,bcp); 973 PUTLONG(alt,bcp); 974 975 return (16); /* size of RR in octets */ 976 } 977 978 /* takes an on-the-wire LOC RR and formats it in a human readable format. */ 979 const char * 980 loc_ntoa(binary, ascii) 981 const u_char *binary; 982 char *ascii; 983 { 984 static const char *error = "?"; 985 static char tmpbuf[sizeof 986 "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"]; 987 const u_char *cp = binary; 988 989 int latdeg, latmin, latsec, latsecfrac; 990 int longdeg, longmin, longsec, longsecfrac; 991 char northsouth, eastwest; 992 const char *altsign; 993 int altmeters, altfrac; 994 995 const u_int32_t referencealt = 100000 * 100; 996 997 int32_t latval, longval, altval; 998 u_int32_t templ; 999 u_int8_t sizeval, hpval, vpval, versionval; 1000 1001 char *sizestr, *hpstr, *vpstr; 1002 1003 versionval = *cp++; 1004 1005 if (ascii == NULL) 1006 ascii = tmpbuf; 1007 1008 if (versionval) { 1009 (void) sprintf(ascii, "; error: unknown LOC RR version"); 1010 return (ascii); 1011 } 1012 1013 sizeval = *cp++; 1014 1015 hpval = *cp++; 1016 vpval = *cp++; 1017 1018 GETLONG(templ, cp); 1019 latval = (templ - ((unsigned)1<<31)); 1020 1021 GETLONG(templ, cp); 1022 longval = (templ - ((unsigned)1<<31)); 1023 1024 GETLONG(templ, cp); 1025 if (templ < referencealt) { /* below WGS 84 spheroid */ 1026 altval = referencealt - templ; 1027 altsign = "-"; 1028 } else { 1029 altval = templ - referencealt; 1030 altsign = ""; 1031 } 1032 1033 if (latval < 0) { 1034 northsouth = 'S'; 1035 latval = -latval; 1036 } else 1037 northsouth = 'N'; 1038 1039 latsecfrac = latval % 1000; 1040 latval = latval / 1000; 1041 latsec = latval % 60; 1042 latval = latval / 60; 1043 latmin = latval % 60; 1044 latval = latval / 60; 1045 latdeg = latval; 1046 1047 if (longval < 0) { 1048 eastwest = 'W'; 1049 longval = -longval; 1050 } else 1051 eastwest = 'E'; 1052 1053 longsecfrac = longval % 1000; 1054 longval = longval / 1000; 1055 longsec = longval % 60; 1056 longval = longval / 60; 1057 longmin = longval % 60; 1058 longval = longval / 60; 1059 longdeg = longval; 1060 1061 altfrac = altval % 100; 1062 altmeters = (altval / 100); 1063 1064 sizestr = strdup(precsize_ntoa((u_int32_t)sizeval)); 1065 hpstr = strdup(precsize_ntoa((u_int32_t)hpval)); 1066 vpstr = strdup(precsize_ntoa((u_int32_t)vpval)); 1067 1068 sprintf(ascii, 1069 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm", 1070 latdeg, latmin, latsec, latsecfrac, northsouth, 1071 longdeg, longmin, longsec, longsecfrac, eastwest, 1072 altsign, altmeters, altfrac, 1073 (sizestr != NULL) ? sizestr : error, 1074 (hpstr != NULL) ? hpstr : error, 1075 (vpstr != NULL) ? vpstr : error); 1076 1077 if (sizestr != NULL) 1078 free(sizestr); 1079 if (hpstr != NULL) 1080 free(hpstr); 1081 if (vpstr != NULL) 1082 free(vpstr); 1083 1084 return (ascii); 1085 } 1086 1087 1088 /* Return the number of DNS hierarchy levels in the name. */ 1089 int 1090 dn_count_labels(const char *name) { 1091 int i, len, count; 1092 1093 len = strlen(name); 1094 for (i = 0, count = 0; i < len; i++) { 1095 /* XXX need to check for \. or use named's nlabels(). */ 1096 if (name[i] == '.') 1097 count++; 1098 } 1099 1100 /* don't count initial wildcard */ 1101 if (name[0] == '*') 1102 if (count) 1103 count--; 1104 1105 /* don't count the null label for root. */ 1106 /* if terminating '.' not found, must adjust */ 1107 /* count to include last label */ 1108 if (len > 0 && name[len-1] != '.') 1109 count++; 1110 return (count); 1111 } 1112 1113 1114 /* 1115 * Make dates expressed in seconds-since-Jan-1-1970 easy to read. 1116 * SIG records are required to be printed like this, by the Secure DNS RFC. 1117 */ 1118 char * 1119 p_secstodate (u_long secs) { 1120 /* XXX nonreentrant */ 1121 static char output[15]; /* YYYYMMDDHHMMSS and null */ 1122 time_t myclock = secs; 1123 struct tm *mytime; 1124 #ifdef HAVE_TIME_R 1125 struct tm res; 1126 1127 mytime = gmtime_r(&myclock, &res); 1128 #else 1129 mytime = gmtime(&myclock); 1130 #endif 1131 mytime->tm_year += 1900; 1132 mytime->tm_mon += 1; 1133 sprintf(output, "%04d%02d%02d%02d%02d%02d", 1134 mytime->tm_year, mytime->tm_mon, mytime->tm_mday, 1135 mytime->tm_hour, mytime->tm_min, mytime->tm_sec); 1136 return (output); 1137 } 1138 1139 u_int16_t 1140 res_nametoclass(const char *buf, int *successp) { 1141 unsigned long result; 1142 char *endptr; 1143 int success; 1144 1145 result = sym_ston(__p_class_syms, buf, &success); 1146 if (success) 1147 goto done; 1148 1149 if (strncasecmp(buf, "CLASS", 5) != 0 || 1150 !isdigit((unsigned char)buf[5])) 1151 goto done; 1152 errno = 0; 1153 result = strtoul(buf + 5, &endptr, 10); 1154 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1155 success = 1; 1156 done: 1157 if (successp) 1158 *successp = success; 1159 return (u_int16_t)(result); 1160 } 1161 1162 u_int16_t 1163 res_nametotype(const char *buf, int *successp) { 1164 unsigned long result; 1165 char *endptr; 1166 int success; 1167 1168 result = sym_ston(__p_type_syms, buf, &success); 1169 if (success) 1170 goto done; 1171 1172 if (strncasecmp(buf, "type", 4) != 0 || 1173 !isdigit((unsigned char)buf[4])) 1174 goto done; 1175 errno = 0; 1176 result = strtoul(buf + 4, &endptr, 10); 1177 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1178 success = 1; 1179 done: 1180 if (successp) 1181 *successp = success; 1182 return (u_int16_t)(result); 1183 } 1184
Indexes created Wed Sep 24 15:09:51 GMT 2025