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[] = "$BINDId: res_debug.c,v 8.34 2000/02/29 05:30:55 vixie Exp $";
  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[] attribute_hidden;
 122 extern const char *_res_sectioncodes[] attribute_hidden;
 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         static int buflen = 2048;
 145         char *buf;
 146         ns_opcode opcode;
 147         ns_rr rr;
 148
 149         /*
 150          * Print answer records.
 151          */
 152         sflag = (statp->pfcode & pflag);
 153         if (statp->pfcode && !sflag)
 154                 return;
 155
 156         buf = malloc(buflen);
 157         if (buf == NULL) {
 158                 fprintf(file, ";; memory allocation failure\n");
 159                 return;
 160         }
 161
 162         opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode);
 163         rrnum = 0;
 164         for (;;) {
 165                 if (ns_parserr(handle, section, rrnum, &rr)) {
 166                         if (errno != ENODEV)
 167                                 fprintf(file, ";; ns_parserr: %s\n",
 168                                         strerror(errno));
 169                         else if (rrnum > 0 && sflag != 0 &&
 170                                  (statp->pfcode & RES_PRF_HEAD1))
 171                                 putc('\n', file);
 172                         goto cleanup;
 173                 }
 174                 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1))
 175                         fprintf(file, ";; %s SECTION:\n",
 176                                 p_section(section, opcode));
 177                 if (section == ns_s_qd)
 178                         fprintf(file, ";;\t%s, type = %s, class = %s\n",
 179                                 ns_rr_name(rr),
 180                                 p_type(ns_rr_type(rr)),
 181                                 p_class(ns_rr_class(rr)));
 182                 else {
 183                         n = ns_sprintrr(handle, &rr, NULL, NULL,
 184                                         buf, buflen);
 185                         if (n < 0) {
 186                                 if (errno == ENOSPC) {
 187                                         free(buf);
 188                                         buf = NULL;
 189                                         if (buflen < 131072)
 190                                                 buf = malloc(buflen += 1024);
 191                                         if (buf == NULL) {
 192                                                 fprintf(file,
 193                                               ";; memory allocation failure\n");
 194                                               return;
 195                                         }
 196                                         continue;
 197                                 }
 198                                 fprintf(file, ";; ns_sprintrr: %s\n",
 199                                         strerror(errno));
 200                                 goto cleanup;
 201                         }
 202                         fputs(buf, file);
 203                         fputc('\n', file);
 204                 }
 205                 rrnum++;
 206         }
 207  cleanup:
 208         if (buf != NULL)
 209                 free(buf);
 210 }
 211
 212 /*
 213  * Print the contents of a query.
 214  * This is intended to be primarily a debugging routine.
 215  */
 216 void
 217 res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) {
 218         ns_msg handle;
 219         int qdcount, ancount, nscount, arcount;
 220         u_int opcode, rcode, id;
 221
 222         if (ns_initparse(msg, len, &handle) < 0) {
 223                 fprintf(file, ";; ns_initparse: %s\n", strerror(errno));
 224                 return;
 225         }
 226         opcode = ns_msg_getflag(handle, ns_f_opcode);
 227         rcode = ns_msg_getflag(handle, ns_f_rcode);
 228         id = ns_msg_id(handle);
 229         qdcount = ns_msg_count(handle, ns_s_qd);
 230         ancount = ns_msg_count(handle, ns_s_an);
 231         nscount = ns_msg_count(handle, ns_s_ns);
 232         arcount = ns_msg_count(handle, ns_s_ar);
 233
 234         /*
 235          * Print header fields.
 236          */
 237         if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode)
 238                 fprintf(file,
 239                         ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n",
 240                         _res_opcodes[opcode], p_rcode(rcode), id);
 241         if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX))
 242                 putc(';', file);
 243         if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) {
 244                 fprintf(file, "; flags:");
 245                 if (ns_msg_getflag(handle, ns_f_qr))
 246                         fprintf(file, " qr");
 247                 if (ns_msg_getflag(handle, ns_f_aa))
 248                         fprintf(file, " aa");
 249                 if (ns_msg_getflag(handle, ns_f_tc))
 250                         fprintf(file, " tc");
 251                 if (ns_msg_getflag(handle, ns_f_rd))
 252                         fprintf(file, " rd");
 253                 if (ns_msg_getflag(handle, ns_f_ra))
 254                         fprintf(file, " ra");
 255                 if (ns_msg_getflag(handle, ns_f_z))
 256                         fprintf(file, " ??");
 257                 if (ns_msg_getflag(handle, ns_f_ad))
 258                         fprintf(file, " ad");
 259                 if (ns_msg_getflag(handle, ns_f_cd))
 260                         fprintf(file, " cd");
 261         }
 262         if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) {
 263                 fprintf(file, "; %s: %d",
 264                         p_section(ns_s_qd, opcode), qdcount);
 265                 fprintf(file, ", %s: %d",
 266                         p_section(ns_s_an, opcode), ancount);
 267                 fprintf(file, ", %s: %d",
 268                         p_section(ns_s_ns, opcode), nscount);
 269                 fprintf(file, ", %s: %d",
 270                         p_section(ns_s_ar, opcode), arcount);
 271         }
 272         if ((!statp->pfcode) || (statp->pfcode &
 273                 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {
 274                 putc('\n',file);
 275         }
 276         /*
 277          * Print the various sections.
 278          */
 279         do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file);
 280         do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file);
 281         do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file);
 282         do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file);
 283         if (qdcount == 0 && ancount == 0 &&
 284             nscount == 0 && arcount == 0)
 285                 putc('\n', file);
 286 }
 287
 288 const u_char *
 289 p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) {
 290         char name[MAXDNAME];
 291         int n;
 292
 293         if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0)
 294                 return (NULL);
 295         if (name[0] == '\0')
 296                 putc('.', file);
 297         else
 298                 fputs(name, file);
 299         return (cp + n);
 300 }
 301 libresolv_hidden_def (p_cdnname)
 302
 303 const u_char *
 304 p_cdname(const u_char *cp, const u_char *msg, FILE *file) {
 305         return (p_cdnname(cp, msg, PACKETSZ, file));
 306 }
 307
 308 /* Return a fully-qualified domain name from a compressed name (with
 309    length supplied).  */
 310
 311 const u_char *
 312 p_fqnname(cp, msg, msglen, name, namelen)
 313         const u_char *cp, *msg;
 314         int msglen;
 315         char *name;
 316         int namelen;
 317 {
 318         int n, newlen;
 319
 320         if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0)
 321                 return (NULL);
 322         newlen = strlen(name);
 323         if (newlen == 0 || name[newlen - 1] != '.') {
 324                 if (newlen + 1 >= namelen)      /* Lack space for final dot */
 325                         return (NULL);
 326                 else
 327                         strcpy(name + newlen, ".");
 328         }
 329         return (cp + n);
 330 }
 331 libresolv_hidden_def (p_fqnname)
 332
 333 /* XXX: the rest of these functions need to become length-limited, too. */
 334
 335 const u_char *
 336 p_fqname(const u_char *cp, const u_char *msg, FILE *file) {
 337         char name[MAXDNAME];
 338         const u_char *n;
 339
 340         n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name);
 341         if (n == NULL)
 342                 return (NULL);
 343         fputs(name, file);
 344         return (n);
 345 }
 346
 347 /*
 348  * Names of RR classes and qclasses.  Classes and qclasses are the same, except
 349  * that C_ANY is a qclass but not a class.  (You can ask for records of class
 350  * C_ANY, but you can't have any records of that class in the database.)
 351  */
 352 const struct res_sym __p_class_syms[] attribute_hidden = {
 353         {C_IN,          "IN"},
 354         {C_CHAOS,       "CHAOS"},
 355         {C_HS,          "HS"},
 356         {C_HS,          "HESIOD"},
 357         {C_ANY,         "ANY"},
 358         {C_NONE,        "NONE"},
 359         {C_IN,          (char *)0}
 360 };
 361
 362 /*
 363  * Names of message sections.
 364  */
 365 const struct res_sym __p_default_section_syms[] attribute_hidden = {
 366         {ns_s_qd,       "QUERY"},
 367         {ns_s_an,       "ANSWER"},
 368         {ns_s_ns,       "AUTHORITY"},
 369         {ns_s_ar,       "ADDITIONAL"},
 370         {0,             (char *)0}
 371 };
 372
 373 const struct res_sym __p_update_section_syms[] attribute_hidden = {
 374         {S_ZONE,        "ZONE"},
 375         {S_PREREQ,      "PREREQUISITE"},
 376         {S_UPDATE,      "UPDATE"},
 377         {S_ADDT,        "ADDITIONAL"},
 378         {0,             (char *)0}
 379 };
 380
 381 const struct res_sym __p_key_syms[] attribute_hidden = {
 382         {NS_ALG_MD5RSA,         "RSA",          "RSA KEY with MD5 hash"},
 383         {NS_ALG_DH,             "DH",           "Diffie Hellman"},
 384         {NS_ALG_DSA,            "DSA",          "Digital Signature Algorithm"},
 385         {NS_ALG_EXPIRE_ONLY,    "EXPIREONLY",   "No algorithm"},
 386         {NS_ALG_PRIVATE_OID,    "PRIVATE",      "Algorithm obtained from OID"},
 387         {0,                     NULL,           NULL}
 388 };
 389
 390 const struct res_sym __p_cert_syms[] attribute_hidden = {
 391         {cert_t_pkix,   "PKIX",         "PKIX (X.509v3) Certificate"},
 392         {cert_t_spki,   "SPKI",         "SPKI certificate"},
 393         {cert_t_pgp,    "PGP",          "PGP certificate"},
 394         {cert_t_url,    "URL",          "URL Private"},
 395         {cert_t_oid,    "OID",          "OID Private"},
 396         {0,             NULL,           NULL}
 397 };
 398
 399 /*
 400  * Names of RR types and qtypes.  Types and qtypes are the same, except
 401  * that T_ANY is a qtype but not a type.  (You can ask for records of type
 402  * T_ANY, but you can't have any records of that type in the database.)
 403  */
 404 const struct res_sym __p_type_syms[] attribute_hidden = {
 405         {ns_t_a,        "A",            "address"},
 406         {ns_t_ns,       "NS",           "name server"},
 407         {ns_t_md,       "MD",           "mail destination (deprecated)"},
 408         {ns_t_mf,       "MF",           "mail forwarder (deprecated)"},
 409         {ns_t_cname,    "CNAME",        "canonical name"},
 410         {ns_t_soa,      "SOA",          "start of authority"},
 411         {ns_t_mb,       "MB",           "mailbox"},
 412         {ns_t_mg,       "MG",           "mail group member"},
 413         {ns_t_mr,       "MR",           "mail rename"},
 414         {ns_t_null,     "NULL",         "null"},
 415         {ns_t_wks,      "WKS",          "well-known service (deprecated)"},
 416         {ns_t_ptr,      "PTR",          "domain name pointer"},
 417         {ns_t_hinfo,    "HINFO",        "host information"},
 418         {ns_t_minfo,    "MINFO",        "mailbox information"},
 419         {ns_t_mx,       "MX",           "mail exchanger"},
 420         {ns_t_txt,      "TXT",          "text"},
 421         {ns_t_rp,       "RP",           "responsible person"},
 422         {ns_t_afsdb,    "AFSDB",        "DCE or AFS server"},
 423         {ns_t_x25,      "X25",          "X25 address"},
 424         {ns_t_isdn,     "ISDN",         "ISDN address"},
 425         {ns_t_rt,       "RT",           "router"},
 426         {ns_t_nsap,     "NSAP",         "nsap address"},
 427         {ns_t_nsap_ptr, "NSAP_PTR",     "domain name pointer"},
 428         {ns_t_sig,      "SIG",          "signature"},
 429         {ns_t_key,      "KEY",          "key"},
 430         {ns_t_px,       "PX",           "mapping information"},
 431         {ns_t_gpos,     "GPOS",         "geographical position (withdrawn)"},
 432         {ns_t_aaaa,     "AAAA",         "IPv6 address"},
 433         {ns_t_loc,      "LOC",          "location"},
 434         {ns_t_nxt,      "NXT",          "next valid name (unimplemented)"},
 435         {ns_t_eid,      "EID",          "endpoint identifier (unimplemented)"},
 436         {ns_t_nimloc,   "NIMLOC",       "NIMROD locator (unimplemented)"},
 437         {ns_t_srv,      "SRV",          "server selection"},
 438         {ns_t_atma,     "ATMA",         "ATM address (unimplemented)"},
 439         {ns_t_tsig,     "TSIG",         "transaction signature"},
 440         {ns_t_ixfr,     "IXFR",         "incremental zone transfer"},
 441         {ns_t_axfr,     "AXFR",         "zone transfer"},
 442         {ns_t_zxfr,     "ZXFR",         "compressed zone transfer"},
 443         {ns_t_mailb,    "MAILB",        "mailbox-related data (deprecated)"},
 444         {ns_t_maila,    "MAILA",        "mail agent (deprecated)"},
 445         {ns_t_naptr,    "NAPTR",        "URN Naming Authority"},
 446         {ns_t_kx,       "KX",           "Key Exchange"},
 447         {ns_t_cert,     "CERT",         "Certificate"},
 448         {ns_t_any,      "ANY",          "\"any\""},
 449         {0,             NULL,           NULL}
 450 };
 451
 452 /*
 453  * Names of DNS rcodes.
 454  */
 455 const struct res_sym __p_rcode_syms[] attribute_hidden = {
 456         {ns_r_noerror,  "NOERROR",              "no error"},
 457         {ns_r_formerr,  "FORMERR",              "format error"},
 458         {ns_r_servfail, "SERVFAIL",             "server failed"},
 459         {ns_r_nxdomain, "NXDOMAIN",             "no such domain name"},
 460         {ns_r_notimpl,  "NOTIMP",               "not implemented"},
 461         {ns_r_refused,  "REFUSED",              "refused"},
 462         {ns_r_yxdomain, "YXDOMAIN",             "domain name exists"},
 463         {ns_r_yxrrset,  "YXRRSET",              "rrset exists"},
 464         {ns_r_nxrrset,  "NXRRSET",              "rrset doesn't exist"},
 465         {ns_r_notauth,  "NOTAUTH",              "not authoritative"},
 466         {ns_r_notzone,  "NOTZONE",              "Not in zone"},
 467         {ns_r_max,      "",                     ""},
 468         {ns_r_badsig,   "BADSIG",               "bad signature"},
 469         {ns_r_badkey,   "BADKEY",               "bad key"},
 470         {ns_r_badtime,  "BADTIME",              "bad time"},
 471         {0,             NULL,                   NULL}
 472 };
 473
 474 int
 475 sym_ston(const struct res_sym *syms, const char *name, int *success) {
 476         for ((void)NULL; syms->name != 0; syms++) {
 477                 if (strcasecmp (name, syms->name) == 0) {
 478                         if (success)
 479                                 *success = 1;
 480                         return (syms->number);
 481                 }
 482         }
 483         if (success)
 484                 *success = 0;
 485         return (syms->number);          /* The default value. */
 486 }
 487
 488 const char *
 489 sym_ntos(const struct res_sym *syms, int number, int *success) {
 490         static char unname[20];
 491
 492         for ((void)NULL; syms->name != 0; syms++) {
 493                 if (number == syms->number) {
 494                         if (success)
 495                                 *success = 1;
 496                         return (syms->name);
 497                 }
 498         }
 499
 500         sprintf(unname, "%d", number);          /* XXX nonreentrant */
 501         if (success)
 502                 *success = 0;
 503         return (unname);
 504 }
 505 libresolv_hidden_def (sym_ntos)
 506
 507 const char *
 508 sym_ntop(const struct res_sym *syms, int number, int *success) {
 509         static char unname[20];
 510
 511         for ((void)NULL; syms->name != 0; syms++) {
 512                 if (number == syms->number) {
 513                         if (success)
 514                                 *success = 1;
 515                         return (syms->humanname);
 516                 }
 517         }
 518         sprintf(unname, "%d", number);          /* XXX nonreentrant */
 519         if (success)
 520                 *success = 0;
 521         return (unname);
 522 }
 523
 524 /*
 525  * Return a string for the type.
 526  */
 527 const char *
 528 p_type(int type) {
 529         return (sym_ntos(__p_type_syms, type, (int *)0));
 530 }
 531 libresolv_hidden_def (p_type)
 532
 533 /*
 534  * Return a string for the type.
 535  */
 536 const char *
 537 p_section(int section, int opcode) {
 538         const struct res_sym *symbols;
 539
 540         switch (opcode) {
 541         case ns_o_update:
 542                 symbols = __p_update_section_syms;
 543                 break;
 544         default:
 545                 symbols = __p_default_section_syms;
 546                 break;
 547         }
 548         return (sym_ntos(symbols, section, (int *)0));
 549 }
 550
 551 /*
 552  * Return a mnemonic for class.
 553  */
 554 const char *
 555 p_class(int class) {
 556         return (sym_ntos(__p_class_syms, class, (int *)0));
 557 }
 558 libresolv_hidden_def (p_class)
 559
 560 /*
 561  * Return a mnemonic for an option
 562  */
 563 const char *
 564 p_option(u_long option) {
 565         static char nbuf[40];
 566
 567         switch (option) {
 568         case RES_INIT:          return "init";
 569         case RES_DEBUG:         return "debug";
 570         case RES_AAONLY:        return "aaonly(unimpl)";
 571         case RES_USEVC:         return "usevc";
 572         case RES_PRIMARY:       return "primry(unimpl)";
 573         case RES_IGNTC:         return "igntc";
 574         case RES_RECURSE:       return "recurs";
 575         case RES_DEFNAMES:      return "defnam";
 576         case RES_STAYOPEN:      return "styopn";
 577         case RES_DNSRCH:        return "dnsrch";
 578         case RES_INSECURE1:     return "insecure1";
 579         case RES_INSECURE2:     return "insecure2";
 580         case RES_USE_INET6:     return "inet6";
 581         case RES_ROTATE:        return "rotate";
 582         case RES_NOCHECKNAME:   return "no-check-names";
 583         case RES_USEBSTRING:    return "ip6-bytstring";
 584                                 /* XXX nonreentrant */
 585         default:                sprintf(nbuf, "?0x%lx?", (u_long)option);
 586                                 return (nbuf);
 587         }
 588 }
 589 libresolv_hidden_def (p_option)
 590
 591 /*
 592  * Return a mnemonic for a time to live.
 593  */
 594 const char *
 595 p_time(u_int32_t value) {
 596         static char nbuf[40];           /* XXX nonreentrant */
 597
 598         if (ns_format_ttl(value, nbuf, sizeof nbuf) < 0)
 599                 sprintf(nbuf, "%u", value);
 600         return (nbuf);
 601 }
 602
 603 /*
 604  * Return a string for the rcode.
 605  */
 606 const char *
 607 p_rcode(int rcode) {
 608         return (sym_ntos(__p_rcode_syms, rcode, (int *)0));
 609 }
 610 libresolv_hidden_def (p_rcode)
 611
 612 /*
 613  * routines to convert between on-the-wire RR format and zone file format.
 614  * Does not contain conversion to/from decimal degrees; divide or multiply
 615  * by 60*60*1000 for that.
 616  */
 617
 618 static const unsigned int poweroften[10]=
 619   { 1, 10, 100, 1000, 10000, 100000,
 620     1000000,10000000,100000000,1000000000};
 621
 622 /* takes an XeY precision/size value, returns a string representation. */
 623 static const char *
 624 precsize_ntoa(prec)
 625         u_int8_t prec;
 626 {
 627         static char retbuf[sizeof "90000000.00"];       /* XXX nonreentrant */
 628         unsigned long val;
 629         int mantissa, exponent;
 630
 631         mantissa = (int)((prec >> 4) & 0x0f) % 10;
 632         exponent = (int)((prec >> 0) & 0x0f) % 10;
 633
 634         val = mantissa * poweroften[exponent];
 635
 636         (void) sprintf(retbuf, "%ld.%.2ld", val/100, val%100);
 637         return (retbuf);
 638 }
 639
 640 /* converts ascii size/precision X * 10**Y(cm) to 0xXY.  moves pointer. */
 641 static u_int8_t
 642 precsize_aton(strptr)
 643         const char **strptr;
 644 {
 645         unsigned int mval = 0, cmval = 0;
 646         u_int8_t retval = 0;
 647         const char *cp;
 648         int exponent;
 649         int mantissa;
 650
 651         cp = *strptr;
 652
 653         while (isdigit(*cp))
 654                 mval = mval * 10 + (*cp++ - '0');
 655
 656         if (*cp == '.') {               /* centimeters */
 657                 cp++;
 658                 if (isdigit(*cp)) {
 659                         cmval = (*cp++ - '0') * 10;
 660                         if (isdigit(*cp)) {
 661                                 cmval += (*cp++ - '0');
 662                         }
 663                 }
 664         }
 665         cmval = (mval * 100) + cmval;
 666
 667         for (exponent = 0; exponent < 9; exponent++)
 668                 if (cmval < poweroften[exponent+1])
 669                         break;
 670
 671         mantissa = cmval / poweroften[exponent];
 672         if (mantissa > 9)
 673                 mantissa = 9;
 674
 675         retval = (mantissa << 4) | exponent;
 676
 677         *strptr = cp;
 678
 679         return (retval);
 680 }
 681
 682 /* converts ascii lat/lon to unsigned encoded 32-bit number.  moves pointer. */
 683 static u_int32_t
 684 latlon2ul(latlonstrptr,which)
 685         const char **latlonstrptr;
 686         int *which;
 687 {
 688         const char *cp;
 689         u_int32_t retval;
 690         int deg = 0, min = 0, secs = 0, secsfrac = 0;
 691
 692         cp = *latlonstrptr;
 693
 694         while (isdigit(*cp))
 695                 deg = deg * 10 + (*cp++ - '0');
 696
 697         while (isspace(*cp))
 698                 cp++;
 699
 700         if (!(isdigit(*cp)))
 701                 goto fndhemi;
 702
 703         while (isdigit(*cp))
 704                 min = min * 10 + (*cp++ - '0');
 705
 706         while (isspace(*cp))
 707                 cp++;
 708
 709         if (!(isdigit(*cp)))
 710                 goto fndhemi;
 711
 712         while (isdigit(*cp))
 713                 secs = secs * 10 + (*cp++ - '0');
 714
 715         if (*cp == '.') {               /* decimal seconds */
 716                 cp++;
 717                 if (isdigit(*cp)) {
 718                         secsfrac = (*cp++ - '0') * 100;
 719                         if (isdigit(*cp)) {
 720                                 secsfrac += (*cp++ - '0') * 10;
 721                                 if (isdigit(*cp)) {
 722                                         secsfrac += (*cp++ - '0');
 723                                 }
 724                         }
 725                 }
 726         }
 727
 728         while (!isspace(*cp))   /* if any trailing garbage */
 729                 cp++;
 730
 731         while (isspace(*cp))
 732                 cp++;
 733
 734  fndhemi:
 735         switch (*cp) {
 736         case 'N': case 'n':
 737         case 'E': case 'e':
 738                 retval = ((unsigned)1<<31)
 739                         + (((((deg * 60) + min) * 60) + secs) * 1000)
 740                         + secsfrac;
 741                 break;
 742         case 'S': case 's':
 743         case 'W': case 'w':
 744                 retval = ((unsigned)1<<31)
 745                         - (((((deg * 60) + min) * 60) + secs) * 1000)
 746                         - secsfrac;
 747                 break;
 748         default:
 749                 retval = 0;     /* invalid value -- indicates error */
 750                 break;
 751         }
 752
 753         switch (*cp) {
 754         case 'N': case 'n':
 755         case 'S': case 's':
 756                 *which = 1;     /* latitude */
 757                 break;
 758         case 'E': case 'e':
 759         case 'W': case 'w':
 760                 *which = 2;     /* longitude */
 761                 break;
 762         default:
 763                 *which = 0;     /* error */
 764                 break;
 765         }
 766
 767         cp++;                   /* skip the hemisphere */
 768
 769         while (!isspace(*cp))   /* if any trailing garbage */
 770                 cp++;
 771
 772         while (isspace(*cp))    /* move to next field */
 773                 cp++;
 774
 775         *latlonstrptr = cp;
 776
 777         return (retval);
 778 }
 779
 780 /* converts a zone file representation in a string to an RDATA on-the-wire
 781  * representation. */
 782 int
 783 loc_aton(ascii, binary)
 784         const char *ascii;
 785         u_char *binary;
 786 {
 787         const char *cp, *maxcp;
 788         u_char *bcp;
 789
 790         u_int32_t latit = 0, longit = 0, alt = 0;
 791         u_int32_t lltemp1 = 0, lltemp2 = 0;
 792         int altmeters = 0, altfrac = 0, altsign = 1;
 793         u_int8_t hp = 0x16;     /* default = 1e6 cm = 10000.00m = 10km */
 794         u_int8_t vp = 0x13;     /* default = 1e3 cm = 10.00m */
 795         u_int8_t siz = 0x12;    /* default = 1e2 cm = 1.00m */
 796         int which1 = 0, which2 = 0;
 797
 798         cp = ascii;
 799         maxcp = cp + strlen(ascii);
 800
 801         lltemp1 = latlon2ul(&cp, &which1);
 802
 803         lltemp2 = latlon2ul(&cp, &which2);
 804
 805         switch (which1 + which2) {
 806         case 3:                 /* 1 + 2, the only valid combination */
 807                 if ((which1 == 1) && (which2 == 2)) { /* normal case */
 808                         latit = lltemp1;
 809                         longit = lltemp2;
 810                 } else if ((which1 == 2) && (which2 == 1)) { /* reversed */
 811                         longit = lltemp1;
 812                         latit = lltemp2;
 813                 } else {        /* some kind of brokenness */
 814                         return (0);
 815                 }
 816                 break;
 817         default:                /* we didn't get one of each */
 818                 return (0);
 819         }
 820
 821         /* altitude */
 822         if (*cp == '-') {
 823                 altsign = -1;
 824                 cp++;
 825         }
 826
 827         if (*cp == '+')
 828                 cp++;
 829
 830         while (isdigit(*cp))
 831                 altmeters = altmeters * 10 + (*cp++ - '0');
 832
 833         if (*cp == '.') {               /* decimal meters */
 834                 cp++;
 835                 if (isdigit(*cp)) {
 836                         altfrac = (*cp++ - '0') * 10;
 837                         if (isdigit(*cp)) {
 838                                 altfrac += (*cp++ - '0');
 839                         }
 840                 }
 841         }
 842
 843         alt = (10000000 + (altsign * (altmeters * 100 + altfrac)));
 844
 845         while (!isspace(*cp) && (cp < maxcp)) /* if trailing garbage or m */
 846                 cp++;
 847
 848         while (isspace(*cp) && (cp < maxcp))
 849                 cp++;
 850
 851         if (cp >= maxcp)
 852                 goto defaults;
 853
 854         siz = precsize_aton(&cp);
 855
 856         while (!isspace(*cp) && (cp < maxcp))   /* if trailing garbage or m */
 857                 cp++;
 858
 859         while (isspace(*cp) && (cp < maxcp))
 860                 cp++;
 861
 862         if (cp >= maxcp)
 863                 goto defaults;
 864
 865         hp = precsize_aton(&cp);
 866
 867         while (!isspace(*cp) && (cp < maxcp))   /* if trailing garbage or m */
 868                 cp++;
 869
 870         while (isspace(*cp) && (cp < maxcp))
 871                 cp++;
 872
 873         if (cp >= maxcp)
 874                 goto defaults;
 875
 876         vp = precsize_aton(&cp);
 877
 878  defaults:
 879
 880         bcp = binary;
 881         *bcp++ = (u_int8_t) 0;  /* version byte */
 882         *bcp++ = siz;
 883         *bcp++ = hp;
 884         *bcp++ = vp;
 885         PUTLONG(latit,bcp);
 886         PUTLONG(longit,bcp);
 887         PUTLONG(alt,bcp);
 888
 889         return (16);            /* size of RR in octets */
 890 }
 891
 892 /* takes an on-the-wire LOC RR and formats it in a human readable format. */
 893 const char *
 894 loc_ntoa(binary, ascii)
 895         const u_char *binary;
 896         char *ascii;
 897 {
 898         static char *error = "?";
 899         static char tmpbuf[sizeof
 900 "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"];
 901         const u_char *cp = binary;
 902
 903         int latdeg, latmin, latsec, latsecfrac;
 904         int longdeg, longmin, longsec, longsecfrac;
 905         char northsouth, eastwest;
 906         int altmeters, altfrac, altsign;
 907
 908         const u_int32_t referencealt = 100000 * 100;
 909
 910         int32_t latval, longval, altval;
 911         u_int32_t templ;
 912         u_int8_t sizeval, hpval, vpval, versionval;
 913
 914         char *sizestr, *hpstr, *vpstr;
 915
 916         versionval = *cp++;
 917
 918         if (ascii == NULL)
 919                 ascii = tmpbuf;
 920
 921         if (versionval) {
 922                 (void) sprintf(ascii, "; error: unknown LOC RR version");
 923                 return (ascii);
 924         }
 925
 926         sizeval = *cp++;
 927
 928         hpval = *cp++;
 929         vpval = *cp++;
 930
 931         GETLONG(templ, cp);
 932         latval = (templ - ((unsigned)1<<31));
 933
 934         GETLONG(templ, cp);
 935         longval = (templ - ((unsigned)1<<31));
 936
 937         GETLONG(templ, cp);
 938         if (templ < referencealt) { /* below WGS 84 spheroid */
 939                 altval = referencealt - templ;
 940                 altsign = -1;
 941         } else {
 942                 altval = templ - referencealt;
 943                 altsign = 1;
 944         }
 945
 946         if (latval < 0) {
 947                 northsouth = 'S';
 948                 latval = -latval;
 949         } else
 950                 northsouth = 'N';
 951
 952         latsecfrac = latval % 1000;
 953         latval = latval / 1000;
 954         latsec = latval % 60;
 955         latval = latval / 60;
 956         latmin = latval % 60;
 957         latval = latval / 60;
 958         latdeg = latval;
 959
 960         if (longval < 0) {
 961                 eastwest = 'W';
 962                 longval = -longval;
 963         } else
 964                 eastwest = 'E';
 965
 966         longsecfrac = longval % 1000;
 967         longval = longval / 1000;
 968         longsec = longval % 60;
 969         longval = longval / 60;
 970         longmin = longval % 60;
 971         longval = longval / 60;
 972         longdeg = longval;
 973
 974         altfrac = altval % 100;
 975         altmeters = (altval / 100) * altsign;
 976
 977         if ((sizestr = strdup(precsize_ntoa(sizeval))) == NULL)
 978                 sizestr = error;
 979         if ((hpstr = strdup(precsize_ntoa(hpval))) == NULL)
 980                 hpstr = error;
 981         if ((vpstr = strdup(precsize_ntoa(vpval))) == NULL)
 982                 vpstr = error;
 983
 984         sprintf(ascii,
 985               "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %d.%.2dm %sm %sm %sm",
 986                 latdeg, latmin, latsec, latsecfrac, northsouth,
 987                 longdeg, longmin, longsec, longsecfrac, eastwest,
 988                 altmeters, altfrac, sizestr, hpstr, vpstr);
 989
 990         if (sizestr != error)
 991                 free(sizestr);
 992         if (hpstr != error)
 993                 free(hpstr);
 994         if (vpstr != error)
 995                 free(vpstr);
 996
 997         return (ascii);
 998 }
 999 libresolv_hidden_def (loc_ntoa)
1000
1001
1002 /* Return the number of DNS hierarchy levels in the name. */
1003 int
1004 dn_count_labels(const char *name) {
1005         int i, len, count;
1006
1007         len = strlen(name);
1008         for (i = 0, count = 0; i < len; i++) {
1009                 /* XXX need to check for \. or use named's nlabels(). */
1010                 if (name[i] == '.')
1011                         count++;
1012         }
1013
1014         /* don't count initial wildcard */
1015         if (name[0] == '*')
1016                 if (count)
1017                         count--;
1018
1019         /* don't count the null label for root. */
1020         /* if terminating '.' not found, must adjust */
1021         /* count to include last label */
1022         if (len > 0 && name[len-1] != '.')
1023                 count++;
1024         return (count);
1025 }
1026
1027
1028 /*
1029  * Make dates expressed in seconds-since-Jan-1-1970 easy to read.
1030  * SIG records are required to be printed like this, by the Secure DNS RFC.
1031  */
1032 char *
1033 p_secstodate (u_long secs) {
1034         /* XXX nonreentrant */
1035         static char output[15];         /* YYYYMMDDHHMMSS and null */
1036         time_t clock = secs;
1037         struct tm *time;
1038
1039 #ifdef HAVE_TIME_R
1040         struct tm timebuf;
1041
1042         time = gmtime_r(&clock, &timebuf);
1043 #else
1044         time = gmtime(&clock);
1045 #endif
1046         time->tm_year += 1900;
1047         time->tm_mon += 1;
1048         sprintf(output, "%04d%02d%02d%02d%02d%02d",
1049                 time->tm_year, time->tm_mon, time->tm_mday,
1050                 time->tm_hour, time->tm_min, time->tm_sec);
1051         return (output);
1052 }