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