resolv/res_debug.c

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