1 /* $NetBSD: res_debug.c,v 1.14 2015/02/24 17:56:20 christos Exp $ */ 2 3 /* 4 * Portions Copyright (C) 2004, 2005, 2008, 2009 Internet Systems Consortium, Inc. ("ISC") 5 * Portions Copyright (C) 1996-2003 Internet Software Consortium. 6 * 7 * Permission to use, copy, modify, and/or distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 12 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 13 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 14 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 16 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17 * PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /* 21 * Copyright (c) 1985 22 * The Regents of the University of California. All rights reserved. 23 * 24 * Redistribution and use in source and binary forms, with or without 25 * modification, are permitted provided that the following conditions 26 * are met: 27 * 1. Redistributions of source code must retain the above copyright 28 * notice, this list of conditions and the following disclaimer. 29 * 2. Redistributions in binary form must reproduce the above copyright 30 * notice, this list of conditions and the following disclaimer in the 31 * documentation and/or other materials provided with the distribution. 32 * 3. Neither the name of the University nor the names of its contributors 33 * may be used to endorse or promote products derived from this software 34 * without specific prior written permission. 35 * 36 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 37 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 39 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 40 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 41 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 42 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 44 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 45 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 46 * SUCH DAMAGE. 47 */ 48 49 /* 50 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 51 * 52 * Permission to use, copy, modify, and distribute this software for any 53 * purpose with or without fee is hereby granted, provided that the above 54 * copyright notice and this permission notice appear in all copies, and that 55 * the name of Digital Equipment Corporation not be used in advertising or 56 * publicity pertaining to distribution of the document or software without 57 * specific, written prior permission. 58 * 59 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 60 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 61 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 62 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 63 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 64 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 65 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 66 * SOFTWARE. 67 */ 68 69 /* 70 * Portions Copyright (c) 1995 by International Business Machines, Inc. 71 * 72 * International Business Machines, Inc. (hereinafter called IBM) grants 73 * permission under its copyrights to use, copy, modify, and distribute this 74 * Software with or without fee, provided that the above copyright notice and 75 * all paragraphs of this notice appear in all copies, and that the name of IBM 76 * not be used in connection with the marketing of any product incorporating 77 * the Software or modifications thereof, without specific, written prior 78 * permission. 79 * 80 * To the extent it has a right to do so, IBM grants an immunity from suit 81 * under its patents, if any, for the use, sale or manufacture of products to 82 * the extent that such products are used for performing Domain Name System 83 * dynamic updates in TCP/IP networks by means of the Software. No immunity is 84 * granted for any product per se or for any other function of any product. 85 * 86 * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES, 87 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 88 * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL, 89 * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING 90 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN 91 * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES. 92 */ 93 94 #include <sys/cdefs.h> 95 #if defined(LIBC_SCCS) && !defined(lint) 96 #ifdef notdef 97 static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93"; 98 static const char rcsid[] = "Id: res_debug.c,v 1.19 2009/02/26 11:20:20 tbox Exp"; 99 #else 100 __RCSID("$NetBSD: res_debug.c,v 1.14 2015/02/24 17:56:20 christos Exp $"); 101 #endif 102 #endif /* LIBC_SCCS and not lint */ 103 104 #include "port_before.h" 105 106 #include "namespace.h" 107 #include <sys/types.h> 108 #include <sys/param.h> 109 #include <sys/socket.h> 110 111 #include <netinet/in.h> 112 #include <arpa/inet.h> 113 #include <arpa/nameser.h> 114 115 #include <assert.h> 116 #include <ctype.h> 117 #include <errno.h> 118 #include <math.h> 119 #include <netdb.h> 120 #include <resolv.h> 121 #include <resolv_mt.h> 122 #include <stdio.h> 123 #include <stdlib.h> 124 #include <string.h> 125 #include <time.h> 126 127 #include "port_after.h" 128 129 #ifdef SPRINTF_CHAR 130 # define SPRINTF(x) strlen(sprintf/**/x) 131 #else 132 # define SPRINTF(x) sprintf x 133 #endif 134 135 extern const char *_res_opcodes[]; 136 extern const char *_res_sectioncodes[]; 137 138 #if 0 139 #ifdef __weak_alias 140 __weak_alias(res_pquery,__res_pquery) 141 __weak_alias(res_nametoclass,__res_nametoclass) 142 __weak_alias(res_nametotype,__res_nametotype) 143 #endif 144 #endif 145 146 #ifndef _LIBC 147 /*% 148 * Print the current options. 149 */ 150 void 151 fp_resstat(const res_state statp, FILE *file) { 152 u_long mask; 153 154 fprintf(file, ";; res options:"); 155 for (mask = 1; mask != 0U; mask <<= 1) 156 if (statp->options & mask) 157 fprintf(file, " %s", p_option(mask)); 158 putc('\n', file); 159 } 160 #endif 161 162 static void 163 do_section(const res_state statp, 164 ns_msg *handle, ns_sect section, 165 int pflag, FILE *file) 166 { 167 int n, sflag, rrnum; 168 static int buflen = 2048; 169 char *buf; 170 ns_opcode opcode; 171 ns_rr rr; 172 173 /* 174 * Print answer records. 175 */ 176 sflag = (int)(statp->pfcode & pflag); 177 if (statp->pfcode && !sflag) 178 return; 179 180 buf = malloc((size_t)buflen); 181 if (buf == NULL) { 182 fprintf(file, ";; memory allocation failure\n"); 183 return; 184 } 185 186 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode); 187 rrnum = 0; 188 for (;;) { 189 if (ns_parserr(handle, section, rrnum, &rr)) { 190 if (errno != ENODEV) 191 fprintf(file, ";; ns_parserr: %s\n", 192 strerror(errno)); 193 else if (rrnum > 0 && sflag != 0 && 194 (statp->pfcode & RES_PRF_HEAD1)) 195 putc('\n', file); 196 goto cleanup; 197 } 198 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1)) 199 fprintf(file, ";; %s SECTION:\n", 200 p_section(section, opcode)); 201 if (section == ns_s_qd) 202 fprintf(file, ";;\t%s, type = %s, class = %s\n", 203 ns_rr_name(rr), 204 p_type(ns_rr_type(rr)), 205 p_class(ns_rr_class(rr))); 206 else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) { 207 size_t rdatalen, ttl; 208 uint16_t optcode, optlen; 209 210 rdatalen = ns_rr_rdlen(rr); 211 ttl = ns_rr_ttl(rr); 212 213 fprintf(file, 214 "; EDNS: version: %zu, udp=%u, flags=%04zx\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, (int)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(const u_char *cp, const u_char *msg, int msglen, char *name, 391 int namelen) 392 { 393 int n; 394 size_t newlen; 395 396 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0) 397 return (NULL); 398 newlen = strlen(name); 399 if (newlen == 0 || name[newlen - 1] != '.') { 400 if ((int)newlen + 1 >= namelen) /*%< Lack space for final dot */ 401 return (NULL); 402 else 403 strcpy(name + newlen, "."); 404 } 405 return (cp + n); 406 } 407 408 /* XXX: the rest of these functions need to become length-limited, too. */ 409 410 const u_char * 411 p_fqname(const u_char *cp, const u_char *msg, FILE *file) { 412 char name[MAXDNAME]; 413 const u_char *n; 414 415 n = p_fqnname(cp, msg, MAXCDNAME, name, (int)sizeof name); 416 if (n == NULL) 417 return (NULL); 418 fputs(name, file); 419 return (n); 420 } 421 422 /*% 423 * Names of RR classes and qclasses. Classes and qclasses are the same, except 424 * that C_ANY is a qclass but not a class. (You can ask for records of class 425 * C_ANY, but you can't have any records of that class in the database.) 426 */ 427 const struct res_sym __p_class_syms[] = { 428 {C_IN, "IN", (char *)0}, 429 {C_CHAOS, "CH", (char *)0}, 430 {C_CHAOS, "CHAOS", (char *)0}, 431 {C_HS, "HS", (char *)0}, 432 {C_HS, "HESIOD", (char *)0}, 433 {C_ANY, "ANY", (char *)0}, 434 {C_NONE, "NONE", (char *)0}, 435 {C_IN, (char *)0, (char *)0} 436 }; 437 438 /*% 439 * Names of message sections. 440 */ 441 const struct res_sym __p_default_section_syms[] = { 442 {ns_s_qd, "QUERY", (char *)0}, 443 {ns_s_an, "ANSWER", (char *)0}, 444 {ns_s_ns, "AUTHORITY", (char *)0}, 445 {ns_s_ar, "ADDITIONAL", (char *)0}, 446 {0, (char *)0, (char *)0} 447 }; 448 449 const struct res_sym __p_update_section_syms[] = { 450 {S_ZONE, "ZONE", (char *)0}, 451 {S_PREREQ, "PREREQUISITE", (char *)0}, 452 {S_UPDATE, "UPDATE", (char *)0}, 453 {S_ADDT, "ADDITIONAL", (char *)0}, 454 {0, (char *)0, (char *)0} 455 }; 456 457 const struct res_sym __p_key_syms[] = { 458 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"}, 459 {NS_ALG_DH, "DH", "Diffie Hellman"}, 460 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"}, 461 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"}, 462 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"}, 463 {0, NULL, NULL} 464 }; 465 466 const struct res_sym __p_cert_syms[] = { 467 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"}, 468 {cert_t_spki, "SPKI", "SPKI certificate"}, 469 {cert_t_pgp, "PGP", "PGP certificate"}, 470 {cert_t_url, "URL", "URL Private"}, 471 {cert_t_oid, "OID", "OID Private"}, 472 {0, NULL, NULL} 473 }; 474 475 /*% 476 * Names of RR types and qtypes. Types and qtypes are the same, except 477 * that T_ANY is a qtype but not a type. (You can ask for records of type 478 * T_ANY, but you can't have any records of that type in the database.) 479 */ 480 const struct res_sym __p_type_syms[] = { 481 {ns_t_a, "A", "address"}, 482 {ns_t_ns, "NS", "name server"}, 483 {ns_t_md, "MD", "mail destination (deprecated)"}, 484 {ns_t_mf, "MF", "mail forwarder (deprecated)"}, 485 {ns_t_cname, "CNAME", "canonical name"}, 486 {ns_t_soa, "SOA", "start of authority"}, 487 {ns_t_mb, "MB", "mailbox"}, 488 {ns_t_mg, "MG", "mail group member"}, 489 {ns_t_mr, "MR", "mail rename"}, 490 {ns_t_null, "NULL", "null"}, 491 {ns_t_wks, "WKS", "well-known service (deprecated)"}, 492 {ns_t_ptr, "PTR", "domain name pointer"}, 493 {ns_t_hinfo, "HINFO", "host information"}, 494 {ns_t_minfo, "MINFO", "mailbox information"}, 495 {ns_t_mx, "MX", "mail exchanger"}, 496 {ns_t_txt, "TXT", "text"}, 497 {ns_t_rp, "RP", "responsible person"}, 498 {ns_t_afsdb, "AFSDB", "DCE or AFS server"}, 499 {ns_t_x25, "X25", "X25 address"}, 500 {ns_t_isdn, "ISDN", "ISDN address"}, 501 {ns_t_rt, "RT", "router"}, 502 {ns_t_nsap, "NSAP", "nsap address"}, 503 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"}, 504 {ns_t_sig, "SIG", "signature"}, 505 {ns_t_key, "KEY", "key"}, 506 {ns_t_px, "PX", "mapping information"}, 507 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"}, 508 {ns_t_aaaa, "AAAA", "IPv6 address"}, 509 {ns_t_loc, "LOC", "location"}, 510 {ns_t_nxt, "NXT", "next valid name (unimplemented)"}, 511 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"}, 512 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"}, 513 {ns_t_srv, "SRV", "server selection"}, 514 {ns_t_atma, "ATMA", "ATM address (unimplemented)"}, 515 {ns_t_naptr, "NAPTR", "naptr"}, 516 {ns_t_kx, "KX", "key exchange"}, 517 {ns_t_cert, "CERT", "certificate"}, 518 {ns_t_a6, "A", "IPv6 address (experminental)"}, 519 {ns_t_dname, "DNAME", "non-terminal redirection"}, 520 {ns_t_opt, "OPT", "opt"}, 521 {ns_t_apl, "apl", "apl"}, 522 {ns_t_ds, "DS", "delegation signer"}, 523 {ns_t_sshfp, "SSFP", "SSH fingerprint"}, 524 {ns_t_ipseckey, "IPSECKEY", "IPSEC key"}, 525 {ns_t_rrsig, "RRSIG", "rrsig"}, 526 {ns_t_nsec, "NSEC", "nsec"}, 527 {ns_t_dnskey, "DNSKEY", "DNS key"}, 528 {ns_t_dhcid, "DHCID", "dynamic host configuration identifier"}, 529 {ns_t_nsec3, "NSEC3", "nsec3"}, 530 {ns_t_nsec3param, "NSEC3PARAM", "NSEC3 parameters"}, 531 {ns_t_hip, "HIP", "host identity protocol"}, 532 {ns_t_spf, "SPF", "sender policy framework"}, 533 {ns_t_tkey, "TKEY", "tkey"}, 534 {ns_t_tsig, "TSIG", "transaction signature"}, 535 {ns_t_ixfr, "IXFR", "incremental zone transfer"}, 536 {ns_t_axfr, "AXFR", "zone transfer"}, 537 {ns_t_zxfr, "ZXFR", "compressed zone transfer"}, 538 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"}, 539 {ns_t_maila, "MAILA", "mail agent (deprecated)"}, 540 {ns_t_naptr, "NAPTR", "URN Naming Authority"}, 541 {ns_t_kx, "KX", "Key Exchange"}, 542 {ns_t_cert, "CERT", "Certificate"}, 543 {ns_t_a6, "A6", "IPv6 Address"}, 544 {ns_t_dname, "DNAME", "dname"}, 545 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"}, 546 {ns_t_opt, "OPT", "EDNS Options"}, 547 {ns_t_any, "ANY", "\"any\""}, 548 {ns_t_dlv, "DLV", "DNSSEC look-aside validation"}, 549 {0, NULL, NULL} 550 }; 551 552 /*% 553 * Names of DNS rcodes. 554 */ 555 const struct res_sym __p_rcode_syms[] = { 556 {ns_r_noerror, "NOERROR", "no error"}, 557 {ns_r_formerr, "FORMERR", "format error"}, 558 {ns_r_servfail, "SERVFAIL", "server failed"}, 559 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"}, 560 {ns_r_notimpl, "NOTIMP", "not implemented"}, 561 {ns_r_refused, "REFUSED", "refused"}, 562 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"}, 563 {ns_r_yxrrset, "YXRRSET", "rrset exists"}, 564 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"}, 565 {ns_r_notauth, "NOTAUTH", "not authoritative"}, 566 {ns_r_notzone, "NOTZONE", "Not in zone"}, 567 {ns_r_max, "", ""}, 568 {ns_r_badsig, "BADSIG", "bad signature"}, 569 {ns_r_badkey, "BADKEY", "bad key"}, 570 {ns_r_badtime, "BADTIME", "bad time"}, 571 {0, NULL, NULL} 572 }; 573 574 int 575 sym_ston(const struct res_sym *syms, const char *name, int *success) { 576 for (; syms->name != 0; syms++) { 577 if (strcasecmp (name, syms->name) == 0) { 578 if (success) 579 *success = 1; 580 return (syms->number); 581 } 582 } 583 if (success) 584 *success = 0; 585 return (syms->number); /*%< The default value. */ 586 } 587 588 const char * 589 sym_ntos(const struct res_sym *syms, int number, int *success) { 590 char *unname = sym_ntos_unname; 591 592 for (; syms->name != 0; syms++) { 593 if (number == syms->number) { 594 if (success) 595 *success = 1; 596 return (syms->name); 597 } 598 } 599 600 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 601 if (success) 602 *success = 0; 603 return (unname); 604 } 605 606 const char * 607 sym_ntop(const struct res_sym *syms, int number, int *success) { 608 char *unname = sym_ntop_unname; 609 610 for (; syms->name != 0; syms++) { 611 if (number == syms->number) { 612 if (success) 613 *success = 1; 614 return (syms->humanname); 615 } 616 } 617 sprintf(unname, "%d", number); /*%< XXX nonreentrant */ 618 if (success) 619 *success = 0; 620 return (unname); 621 } 622 623 /*% 624 * Return a string for the type. 625 */ 626 const char * 627 p_type(int type) { 628 int success; 629 const char *result; 630 static char typebuf[20]; 631 632 result = sym_ntos(__p_type_syms, type, &success); 633 if (success) 634 return (result); 635 if (type < 0 || type > 0xffff) 636 return ("BADTYPE"); 637 sprintf(typebuf, "TYPE%d", type); 638 return (typebuf); 639 } 640 641 /*% 642 * Return a string for the type. 643 */ 644 const char * 645 p_section(int section, int opcode) { 646 const struct res_sym *symbols; 647 648 switch (opcode) { 649 case ns_o_update: 650 symbols = __p_update_section_syms; 651 break; 652 default: 653 symbols = __p_default_section_syms; 654 break; 655 } 656 return (sym_ntos(symbols, section, (int *)0)); 657 } 658 659 /*% 660 * Return a mnemonic for class. 661 */ 662 const char * 663 p_class(int class) { 664 int success; 665 const char *result; 666 static char classbuf[20]; 667 668 result = sym_ntos(__p_class_syms, class, &success); 669 if (success) 670 return (result); 671 if (class < 0 || class > 0xffff) 672 return ("BADCLASS"); 673 sprintf(classbuf, "CLASS%d", class); 674 return (classbuf); 675 } 676 677 /*% 678 * Return a mnemonic for an option 679 */ 680 const char * 681 p_option(u_long option) { 682 char *nbuf = p_option_nbuf; 683 684 switch (option) { 685 case RES_INIT: return "init"; 686 case RES_DEBUG: return "debug"; 687 case RES_AAONLY: return "aaonly(unimpl)"; 688 case RES_USEVC: return "usevc"; 689 case RES_PRIMARY: return "primry(unimpl)"; 690 case RES_IGNTC: return "igntc"; 691 case RES_RECURSE: return "recurs"; 692 case RES_DEFNAMES: return "defnam"; 693 case RES_STAYOPEN: return "styopn"; 694 case RES_DNSRCH: return "dnsrch"; 695 case RES_INSECURE1: return "insecure1"; 696 case RES_INSECURE2: return "insecure2"; 697 case RES_NOALIASES: return "noaliases"; 698 case RES_USE_INET6: return "inet6"; 699 #ifdef RES_USE_EDNS0 /*%< KAME extension */ 700 case RES_USE_EDNS0: return "edns0"; 701 case RES_NSID: return "nsid"; 702 #endif 703 #ifdef RES_USE_DNAME 704 case RES_USE_DNAME: return "dname"; 705 #endif 706 #ifdef RES_USE_DNSSEC 707 case RES_USE_DNSSEC: return "dnssec"; 708 #endif 709 #ifdef RES_NOTLDQUERY 710 case RES_NOTLDQUERY: return "no-tld-query"; 711 #endif 712 #ifdef RES_NO_NIBBLE2 713 case RES_NO_NIBBLE2: return "no-nibble2"; 714 #endif 715 /* XXX nonreentrant */ 716 default: sprintf(nbuf, "?0x%lx?", (u_long)option); 717 return (nbuf); 718 } 719 } 720 721 /*% 722 * Return a mnemonic for a time to live. 723 */ 724 const char * 725 p_time(u_int32_t value) { 726 char *nbuf = p_time_nbuf; 727 728 if (ns_format_ttl((u_long)value, nbuf, sizeof nbuf) < 0) 729 sprintf(nbuf, "%u", value); 730 return (nbuf); 731 } 732 733 /*% 734 * Return a string for the rcode. 735 */ 736 const char * 737 p_rcode(int rcode) { 738 return (sym_ntos(__p_rcode_syms, rcode, (int *)0)); 739 } 740 741 /*% 742 * Return a string for a res_sockaddr_union. 743 */ 744 const char * 745 p_sockun(union res_sockaddr_union u, char *buf, size_t size) { 746 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"]; 747 748 switch (u.sin.sin_family) { 749 case AF_INET: 750 inet_ntop(AF_INET, &u.sin.sin_addr, ret, (socklen_t)sizeof ret); 751 break; 752 #ifdef HAS_INET6_STRUCTS 753 case AF_INET6: 754 inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret); 755 break; 756 #endif 757 default: 758 sprintf(ret, "[af%d]", u.sin.sin_family); 759 break; 760 } 761 if (size > 0U) { 762 strncpy(buf, ret, size - 1); 763 buf[size - 1] = '0'; 764 } 765 return (buf); 766 } 767 768 /*% 769 * routines to convert between on-the-wire RR format and zone file format. 770 * Does not contain conversion to/from decimal degrees; divide or multiply 771 * by 60*60*1000 for that. 772 */ 773 774 static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000, 775 1000000,10000000,100000000,1000000000}; 776 777 /*% takes an XeY precision/size value, returns a string representation. */ 778 static const char * 779 precsize_ntoa(u_int32_t prec) 780 { 781 char *retbuf = precsize_ntoa_retbuf; 782 unsigned long val; 783 int mantissa, exponent; 784 785 mantissa = (int)((prec >> 4) & 0x0f) % 10; 786 exponent = (int)((prec >> 0) & 0x0f) % 10; 787 788 val = mantissa * poweroften[exponent]; 789 790 (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100); 791 return (retbuf); 792 } 793 794 /*% converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */ 795 static u_int8_t 796 precsize_aton(const char **strptr) { 797 unsigned int mval = 0, cmval = 0; 798 u_int8_t retval = 0; 799 const char *cp; 800 int exponent; 801 int mantissa; 802 803 cp = *strptr; 804 805 while (isdigit((unsigned char)*cp)) 806 mval = mval * 10 + (*cp++ - '0'); 807 808 if (*cp == '.') { /*%< centimeters */ 809 cp++; 810 if (isdigit((unsigned char)*cp)) { 811 cmval = (*cp++ - '0') * 10; 812 if (isdigit((unsigned char)*cp)) { 813 cmval += (*cp++ - '0'); 814 } 815 } 816 } 817 cmval = (mval * 100) + cmval; 818 819 for (exponent = 0; exponent < 9; exponent++) 820 if (cmval < poweroften[exponent+1]) 821 break; 822 823 mantissa = cmval / poweroften[exponent]; 824 if (mantissa > 9) 825 mantissa = 9; 826 827 retval = (mantissa << 4) | exponent; 828 829 *strptr = cp; 830 831 return (retval); 832 } 833 834 /*% converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */ 835 static u_int32_t 836 latlon2ul(const char **latlonstrptr, int *which) { 837 const char *cp; 838 u_int32_t retval; 839 int deg = 0, min = 0, secs = 0, secsfrac = 0; 840 841 cp = *latlonstrptr; 842 843 while (isdigit((unsigned char)*cp)) 844 deg = deg * 10 + (*cp++ - '0'); 845 846 while (isspace((unsigned char)*cp)) 847 cp++; 848 849 if (!(isdigit((unsigned char)*cp))) 850 goto fndhemi; 851 852 while (isdigit((unsigned char)*cp)) 853 min = min * 10 + (*cp++ - '0'); 854 855 while (isspace((unsigned char)*cp)) 856 cp++; 857 858 if (!(isdigit((unsigned char)*cp))) 859 goto fndhemi; 860 861 while (isdigit((unsigned char)*cp)) 862 secs = secs * 10 + (*cp++ - '0'); 863 864 if (*cp == '.') { /*%< decimal seconds */ 865 cp++; 866 if (isdigit((unsigned char)*cp)) { 867 secsfrac = (*cp++ - '0') * 100; 868 if (isdigit((unsigned char)*cp)) { 869 secsfrac += (*cp++ - '0') * 10; 870 if (isdigit((unsigned char)*cp)) { 871 secsfrac += (*cp++ - '0'); 872 } 873 } 874 } 875 } 876 877 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 878 cp++; 879 880 while (isspace((unsigned char)*cp)) 881 cp++; 882 883 fndhemi: 884 switch (*cp) { 885 case 'N': case 'n': 886 case 'E': case 'e': 887 retval = ((unsigned)1<<31) 888 + (((((deg * 60) + min) * 60) + secs) * 1000) 889 + secsfrac; 890 break; 891 case 'S': case 's': 892 case 'W': case 'w': 893 retval = ((unsigned)1<<31) 894 - (((((deg * 60) + min) * 60) + secs) * 1000) 895 - secsfrac; 896 break; 897 default: 898 retval = 0; /*%< invalid value -- indicates error */ 899 break; 900 } 901 902 switch (*cp) { 903 case 'N': case 'n': 904 case 'S': case 's': 905 *which = 1; /*%< latitude */ 906 break; 907 case 'E': case 'e': 908 case 'W': case 'w': 909 *which = 2; /*%< longitude */ 910 break; 911 default: 912 *which = 0; /*%< error */ 913 break; 914 } 915 916 cp++; /*%< skip the hemisphere */ 917 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */ 918 cp++; 919 920 while (isspace((unsigned char)*cp)) /*%< move to next field */ 921 cp++; 922 923 *latlonstrptr = cp; 924 925 return (retval); 926 } 927 928 /*% 929 * converts a zone file representation in a string to an RDATA on-the-wire 930 * representation. */ 931 int 932 loc_aton(const char *ascii, u_char *binary) 933 { 934 const char *cp, *maxcp; 935 u_char *bcp; 936 937 u_int32_t latit = 0, longit = 0, alt = 0; 938 u_int32_t lltemp1 = 0, lltemp2 = 0; 939 int altmeters = 0, altfrac = 0, altsign = 1; 940 u_int8_t hp = 0x16; /*%< default = 1e6 cm = 10000.00m = 10km */ 941 u_int8_t vp = 0x13; /*%< default = 1e3 cm = 10.00m */ 942 u_int8_t siz = 0x12; /*%< default = 1e2 cm = 1.00m */ 943 int which1 = 0, which2 = 0; 944 945 cp = ascii; 946 maxcp = cp + strlen(ascii); 947 948 lltemp1 = latlon2ul(&cp, &which1); 949 950 lltemp2 = latlon2ul(&cp, &which2); 951 952 switch (which1 + which2) { 953 case 3: /*%< 1 + 2, the only valid combination */ 954 if ((which1 == 1) && (which2 == 2)) { /*%< normal case */ 955 latit = lltemp1; 956 longit = lltemp2; 957 } else if ((which1 == 2) && (which2 == 1)) { /*%< reversed */ 958 longit = lltemp1; 959 latit = lltemp2; 960 } else { /*%< some kind of brokenness */ 961 return (0); 962 } 963 break; 964 default: /*%< we didn't get one of each */ 965 return (0); 966 } 967 968 /* altitude */ 969 if (*cp == '-') { 970 altsign = -1; 971 cp++; 972 } 973 974 if (*cp == '+') 975 cp++; 976 977 while (isdigit((unsigned char)*cp)) 978 altmeters = altmeters * 10 + (*cp++ - '0'); 979 980 if (*cp == '.') { /*%< decimal meters */ 981 cp++; 982 if (isdigit((unsigned char)*cp)) { 983 altfrac = (*cp++ - '0') * 10; 984 if (isdigit((unsigned char)*cp)) { 985 altfrac += (*cp++ - '0'); 986 } 987 } 988 } 989 990 alt = (10000000 + (altsign * (altmeters * 100 + altfrac))); 991 992 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 993 cp++; 994 995 while (isspace((unsigned char)*cp) && (cp < maxcp)) 996 cp++; 997 998 if (cp >= maxcp) 999 goto defaults; 1000 1001 siz = precsize_aton(&cp); 1002 1003 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 1004 cp++; 1005 1006 while (isspace((unsigned char)*cp) && (cp < maxcp)) 1007 cp++; 1008 1009 if (cp >= maxcp) 1010 goto defaults; 1011 1012 hp = precsize_aton(&cp); 1013 1014 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */ 1015 cp++; 1016 1017 while (isspace((unsigned char)*cp) && (cp < maxcp)) 1018 cp++; 1019 1020 if (cp >= maxcp) 1021 goto defaults; 1022 1023 vp = precsize_aton(&cp); 1024 1025 defaults: 1026 1027 bcp = binary; 1028 *bcp++ = (u_int8_t) 0; /*%< version byte */ 1029 *bcp++ = siz; 1030 *bcp++ = hp; 1031 *bcp++ = vp; 1032 PUTLONG(latit,bcp); 1033 PUTLONG(longit,bcp); 1034 PUTLONG(alt,bcp); 1035 1036 return (16); /*%< size of RR in octets */ 1037 } 1038 1039 /*% takes an on-the-wire LOC RR and formats it in a human readable format. */ 1040 const char * 1041 loc_ntoa(const u_char *binary, char *ascii) 1042 { 1043 static const char *error = "?"; 1044 static char tmpbuf[sizeof 1045 "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"]; 1046 const u_char *cp = binary; 1047 1048 int latdeg, latmin, latsec, latsecfrac; 1049 int longdeg, longmin, longsec, longsecfrac; 1050 char northsouth, eastwest; 1051 const char *altsign; 1052 int altmeters, altfrac; 1053 1054 const u_int32_t referencealt = 100000 * 100; 1055 1056 int32_t latval, longval, altval; 1057 u_int32_t templ; 1058 u_int8_t sizeval, hpval, vpval, versionval; 1059 1060 char *sizestr, *hpstr, *vpstr; 1061 1062 versionval = *cp++; 1063 1064 if (ascii == NULL) 1065 ascii = tmpbuf; 1066 1067 if (versionval) { 1068 (void) sprintf(ascii, "; error: unknown LOC RR version"); 1069 return (ascii); 1070 } 1071 1072 sizeval = *cp++; 1073 1074 hpval = *cp++; 1075 vpval = *cp++; 1076 1077 GETLONG(templ, cp); 1078 latval = (templ - ((unsigned)1<<31)); 1079 1080 GETLONG(templ, cp); 1081 longval = (templ - ((unsigned)1<<31)); 1082 1083 GETLONG(templ, cp); 1084 if (templ < referencealt) { /*%< below WGS 84 spheroid */ 1085 altval = referencealt - templ; 1086 altsign = "-"; 1087 } else { 1088 altval = templ - referencealt; 1089 altsign = ""; 1090 } 1091 1092 if (latval < 0) { 1093 northsouth = 'S'; 1094 latval = -latval; 1095 } else 1096 northsouth = 'N'; 1097 1098 latsecfrac = latval % 1000; 1099 latval = latval / 1000; 1100 latsec = latval % 60; 1101 latval = latval / 60; 1102 latmin = latval % 60; 1103 latval = latval / 60; 1104 latdeg = latval; 1105 1106 if (longval < 0) { 1107 eastwest = 'W'; 1108 longval = -longval; 1109 } else 1110 eastwest = 'E'; 1111 1112 longsecfrac = longval % 1000; 1113 longval = longval / 1000; 1114 longsec = longval % 60; 1115 longval = longval / 60; 1116 longmin = longval % 60; 1117 longval = longval / 60; 1118 longdeg = longval; 1119 1120 altfrac = altval % 100; 1121 altmeters = (altval / 100); 1122 1123 sizestr = strdup(precsize_ntoa((u_int32_t)sizeval)); 1124 hpstr = strdup(precsize_ntoa((u_int32_t)hpval)); 1125 vpstr = strdup(precsize_ntoa((u_int32_t)vpval)); 1126 1127 sprintf(ascii, 1128 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm", 1129 latdeg, latmin, latsec, latsecfrac, northsouth, 1130 longdeg, longmin, longsec, longsecfrac, eastwest, 1131 altsign, altmeters, altfrac, 1132 (sizestr != NULL) ? sizestr : error, 1133 (hpstr != NULL) ? hpstr : error, 1134 (vpstr != NULL) ? vpstr : error); 1135 1136 if (sizestr != NULL) 1137 free(sizestr); 1138 if (hpstr != NULL) 1139 free(hpstr); 1140 if (vpstr != NULL) 1141 free(vpstr); 1142 1143 return (ascii); 1144 } 1145 1146 1147 /*% Return the number of DNS hierarchy levels in the name. */ 1148 int 1149 dn_count_labels(const char *name) { 1150 size_t len, i, count; 1151 1152 len = strlen(name); 1153 for (i = 0, count = 0; i < len; i++) { 1154 /* XXX need to check for \. or use named's nlabels(). */ 1155 if (name[i] == '.') 1156 count++; 1157 } 1158 1159 /* don't count initial wildcard */ 1160 if (name[0] == '*') 1161 if (count) 1162 count--; 1163 1164 /* don't count the null label for root. */ 1165 /* if terminating '.' not found, must adjust */ 1166 /* count to include last label */ 1167 if (len > 0 && name[len-1] != '.') 1168 count++; 1169 _DIAGASSERT(__type_fit(int, count)); 1170 return (int)count; 1171 } 1172 1173 /*% 1174 * Make dates expressed in seconds-since-Jan-1-1970 easy to read. 1175 * SIG records are required to be printed like this, by the Secure DNS RFC. 1176 */ 1177 char * 1178 p_secstodate (u_long secs) { 1179 /* XXX nonreentrant */ 1180 char *output = p_secstodate_output; 1181 time_t myclock = secs; 1182 struct tm *mytime; 1183 #ifdef HAVE_TIME_R 1184 struct tm res; 1185 1186 mytime = gmtime_r(&myclock, &res); 1187 #else 1188 mytime = gmtime(&myclock); 1189 #endif 1190 mytime->tm_year += 1900; 1191 mytime->tm_mon += 1; 1192 sprintf(output, "%04d%02d%02d%02d%02d%02d", 1193 mytime->tm_year, mytime->tm_mon, mytime->tm_mday, 1194 mytime->tm_hour, mytime->tm_min, mytime->tm_sec); 1195 return (output); 1196 } 1197 1198 u_int16_t 1199 res_nametoclass(const char *buf, int *successp) { 1200 unsigned long result; 1201 char *endptr; 1202 int success; 1203 1204 result = sym_ston(__p_class_syms, buf, &success); 1205 if (success) 1206 goto done; 1207 1208 if (strncasecmp(buf, "CLASS", 5) != 0 || 1209 !isdigit((unsigned char)buf[5])) 1210 goto done; 1211 errno = 0; 1212 result = strtoul(buf + 5, &endptr, 10); 1213 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1214 success = 1; 1215 done: 1216 if (successp) 1217 *successp = success; 1218 return (u_int16_t)(result); 1219 } 1220 1221 u_int16_t 1222 res_nametotype(const char *buf, int *successp) { 1223 unsigned long result; 1224 char *endptr; 1225 int success; 1226 1227 result = sym_ston(__p_type_syms, buf, &success); 1228 if (success) 1229 goto done; 1230 1231 if (strncasecmp(buf, "type", 4) != 0 || 1232 !isdigit((unsigned char)buf[4])) 1233 goto done; 1234 errno = 0; 1235 result = strtoul(buf + 4, &endptr, 10); 1236 if (errno == 0 && *endptr == '\0' && result <= 0xffffU) 1237 success = 1; 1238 done: 1239 if (successp) 1240 *successp = success; 1241 return (u_int16_t)(result); 1242 } 1243 1244 /*! \file */ 1245