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_sectioncodes[] attribute_hidden;
 122
 123 /*
 124  * Print the current options.
 125  */
 126 void
 127 fp_resstat(const res_state statp, FILE *file) {
 128         u_long mask;
 129
 130         fprintf(file, ";; res options:");
 131         for (mask = 1;  mask != 0;  mask <<= 1)
 132                 if (statp->options & mask)
 133                         fprintf(file, " %s", p_option(mask));
 134         putc('\n', file);
 135 }
 136
 137 static void
 138 do_section(const res_state statp,
 139            ns_msg *handle, ns_sect section,
 140            int pflag, FILE *file)
 141 {
 142         int n, sflag, rrnum;
 143         static int buflen = 2048;
 144         char *buf;
 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         buf = malloc(buflen);
 156         if (buf == NULL) {
 157                 fprintf(file, ";; memory allocation failure\n");
 158                 return;
 159         }
 160
 161         opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode);
 162         rrnum = 0;
 163         for (;;) {
 164                 if (ns_parserr(handle, section, rrnum, &rr)) {
 165                         if (errno != ENODEV)
 166                                 fprintf(file, ";; ns_parserr: %s\n",
 167                                         strerror(errno));
 168                         else if (rrnum > 0 && sflag != 0 &&
 169                                  (statp->pfcode & RES_PRF_HEAD1))
 170                                 putc('\n', file);
 171                         goto cleanup;
 172                 }
 173                 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1))
 174                         fprintf(file, ";; %s SECTION:\n",
 175                                 p_section(section, opcode));
 176                 if (section == ns_s_qd)
 177                         fprintf(file, ";;\t%s, type = %s, class = %s\n",
 178                                 ns_rr_name(rr),
 179                                 p_type(ns_rr_type(rr)),
 180                                 p_class(ns_rr_class(rr)));
 181                 else {
 182                         n = ns_sprintrr(handle, &rr, NULL, NULL,
 183                                         buf, buflen);
 184                         if (n < 0) {
 185                                 if (errno == ENOSPC) {
 186                                         free(buf);
 187                                         buf = NULL;
 188                                         if (buflen < 131072)
 189                                                 buf = malloc(buflen += 1024);
 190                                         if (buf == NULL) {
 191                                                 fprintf(file,
 192                                               ";; memory allocation failure\n");
 193                                               return;
 194                                         }
 195                                         continue;
 196                                 }
 197                                 fprintf(file, ";; ns_sprintrr: %s\n",
 198                                         strerror(errno));
 199                                 goto cleanup;
 200                         }
 201                         fputs(buf, file);
 202                         fputc('\n', file);
 203                 }
 204                 rrnum++;
 205         }
 206  cleanup:
 207         if (buf != NULL)
 208                 free(buf);
 209 }
 210
 211 /*
 212  * Print the contents of a query.
 213  * This is intended to be primarily a debugging routine.
 214  */
 215 void
 216 res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) {
 217         ns_msg handle;
 218         int qdcount, ancount, nscount, arcount;
 219         u_int opcode, rcode, id;
 220
 221         if (ns_initparse(msg, len, &handle) < 0) {
 222                 fprintf(file, ";; ns_initparse: %s\n", strerror(errno));
 223                 return;
 224         }
 225         opcode = ns_msg_getflag(handle, ns_f_opcode);
 226         rcode = ns_msg_getflag(handle, ns_f_rcode);
 227         id = ns_msg_id(handle);
 228         qdcount = ns_msg_count(handle, ns_s_qd);
 229         ancount = ns_msg_count(handle, ns_s_an);
 230         nscount = ns_msg_count(handle, ns_s_ns);
 231         arcount = ns_msg_count(handle, ns_s_ar);
 232
 233         /*
 234          * Print header fields.
 235          */
 236         if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode)
 237                 fprintf(file,
 238                         ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n",
 239                         _res_opcodes[opcode], p_rcode(rcode), id);
 240         if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX))
 241                 putc(';', file);
 242         if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) {
 243                 fprintf(file, "; flags:");
 244                 if (ns_msg_getflag(handle, ns_f_qr))
 245                         fprintf(file, " qr");
 246                 if (ns_msg_getflag(handle, ns_f_aa))
 247                         fprintf(file, " aa");
 248                 if (ns_msg_getflag(handle, ns_f_tc))
 249                         fprintf(file, " tc");
 250                 if (ns_msg_getflag(handle, ns_f_rd))
 251                         fprintf(file, " rd");
 252                 if (ns_msg_getflag(handle, ns_f_ra))
 253                         fprintf(file, " ra");
 254                 if (ns_msg_getflag(handle, ns_f_z))
 255                         fprintf(file, " ??");
 256                 if (ns_msg_getflag(handle, ns_f_ad))
 257                         fprintf(file, " ad");
 258                 if (ns_msg_getflag(handle, ns_f_cd))
 259                         fprintf(file, " cd");
 260         }
 261         if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) {
 262                 fprintf(file, "; %s: %d",
 263                         p_section(ns_s_qd, opcode), qdcount);
 264                 fprintf(file, ", %s: %d",
 265                         p_section(ns_s_an, opcode), ancount);
 266                 fprintf(file, ", %s: %d",
 267                         p_section(ns_s_ns, opcode), nscount);
 268                 fprintf(file, ", %s: %d",
 269                         p_section(ns_s_ar, opcode), arcount);
 270         }
 271         if ((!statp->pfcode) || (statp->pfcode &
 272                 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {
 273                 putc('\n',file);
 274         }
 275         /*
 276          * Print the various sections.
 277          */
 278         do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file);
 279         do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file);
 280         do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file);
 281         do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file);
 282         if (qdcount == 0 && ancount == 0 &&
 283             nscount == 0 && arcount == 0)
 284                 putc('\n', file);
 285 }
 286
 287 const u_char *
 288 p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) {
 289         char name[MAXDNAME];
 290         int n;
 291
 292         if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0)
 293                 return (NULL);
 294         if (name[0] == '\0')
 295                 putc('.', file);
 296         else
 297                 fputs(name, file);
 298         return (cp + n);
 299 }
 300 libresolv_hidden_def (p_cdnname)
 301
 302 const u_char *
 303 p_cdname(const u_char *cp, const u_char *msg, FILE *file) {
 304         return (p_cdnname(cp, msg, PACKETSZ, file));
 305 }
 306
 307 /* Return a fully-qualified domain name from a compressed name (with
 308    length supplied).  */
 309
 310 const u_char *
 311 p_fqnname(cp, msg, msglen, name, namelen)
 312         const u_char *cp, *msg;
 313         int msglen;
 314         char *name;
 315         int namelen;
 316 {
 317         int n, newlen;
 318
 319         if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0)
 320                 return (NULL);
 321         newlen = strlen(name);
 322         if (newlen == 0 || name[newlen - 1] != '.') {
 323                 if (newlen + 1 >= namelen)      /* Lack space for final dot */
 324                         return (NULL);
 325                 else
 326                         strcpy(name + newlen, ".");
 327         }
 328         return (cp + n);
 329 }
 330 libresolv_hidden_def (p_fqnname)
 331
 332 /* XXX: the rest of these functions need to become length-limited, too. */
 333
 334 const u_char *
 335 p_fqname(const u_char *cp, const u_char *msg, FILE *file) {
 336         char name[MAXDNAME];
 337         const u_char *n;
 338
 339         n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name);
 340         if (n == NULL)
 341                 return (NULL);
 342         fputs(name, file);
 343         return (n);
 344 }
 345
 346 /*
 347  * Names of RR classes and qclasses.  Classes and qclasses are the same, except
 348  * that C_ANY is a qclass but not a class.  (You can ask for records of class
 349  * C_ANY, but you can't have any records of that class in the database.)
 350  */
 351 extern const struct res_sym __p_class_syms[];
 352 libresolv_hidden_proto (__p_class_syms)
 353 const struct res_sym __p_class_syms[] = {
 354         {C_IN,          "IN"},
 355         {C_CHAOS,       "CHAOS"},
 356         {C_HS,          "HS"},
 357         {C_HS,          "HESIOD"},
 358         {C_ANY,         "ANY"},
 359         {C_NONE,        "NONE"},
 360         {C_IN,          (char *)0}
 361 };
 362 libresolv_hidden_data_def (__p_class_syms)
 363
 364 /*
 365  * Names of message sections.
 366  */
 367 const struct res_sym __p_default_section_syms[] attribute_hidden = {
 368         {ns_s_qd,       "QUERY"},
 369         {ns_s_an,       "ANSWER"},
 370         {ns_s_ns,       "AUTHORITY"},
 371         {ns_s_ar,       "ADDITIONAL"},
 372         {0,             (char *)0}
 373 };
 374
 375 const struct res_sym __p_update_section_syms[] attribute_hidden = {
 376         {S_ZONE,        "ZONE"},
 377         {S_PREREQ,      "PREREQUISITE"},
 378         {S_UPDATE,      "UPDATE"},
 379         {S_ADDT,        "ADDITIONAL"},
 380         {0,             (char *)0}
 381 };
 382
 383 const struct res_sym __p_key_syms[] attribute_hidden = {
 384         {NS_ALG_MD5RSA,         "RSA",          "RSA KEY with MD5 hash"},
 385         {NS_ALG_DH,             "DH",           "Diffie Hellman"},
 386         {NS_ALG_DSA,            "DSA",          "Digital Signature Algorithm"},
 387         {NS_ALG_EXPIRE_ONLY,    "EXPIREONLY",   "No algorithm"},
 388         {NS_ALG_PRIVATE_OID,    "PRIVATE",      "Algorithm obtained from OID"},
 389         {0,                     NULL,           NULL}
 390 };
 391
 392 const struct res_sym __p_cert_syms[] attribute_hidden = {
 393         {cert_t_pkix,   "PKIX",         "PKIX (X.509v3) Certificate"},
 394         {cert_t_spki,   "SPKI",         "SPKI certificate"},
 395         {cert_t_pgp,    "PGP",          "PGP certificate"},
 396         {cert_t_url,    "URL",          "URL Private"},
 397         {cert_t_oid,    "OID",          "OID Private"},
 398         {0,             NULL,           NULL}
 399 };
 400
 401 /*
 402  * Names of RR types and qtypes.  Types and qtypes are the same, except
 403  * that T_ANY is a qtype but not a type.  (You can ask for records of type
 404  * T_ANY, but you can't have any records of that type in the database.)
 405  */
 406 extern const struct res_sym __p_type_syms[];
 407 libresolv_hidden_proto (__p_type_syms)
 408 const struct res_sym __p_type_syms[] = {
 409         {ns_t_a,        "A",            "address"},
 410         {ns_t_ns,       "NS",           "name server"},
 411         {ns_t_md,       "MD",           "mail destination (deprecated)"},
 412         {ns_t_mf,       "MF",           "mail forwarder (deprecated)"},
 413         {ns_t_cname,    "CNAME",        "canonical name"},
 414         {ns_t_soa,      "SOA",          "start of authority"},
 415         {ns_t_mb,       "MB",           "mailbox"},
 416         {ns_t_mg,       "MG",           "mail group member"},
 417         {ns_t_mr,       "MR",           "mail rename"},
 418         {ns_t_null,     "NULL",         "null"},
 419         {ns_t_wks,      "WKS",          "well-known service (deprecated)"},
 420         {ns_t_ptr,      "PTR",          "domain name pointer"},
 421         {ns_t_hinfo,    "HINFO",        "host information"},
 422         {ns_t_minfo,    "MINFO",        "mailbox information"},
 423         {ns_t_mx,       "MX",           "mail exchanger"},
 424         {ns_t_txt,      "TXT",          "text"},
 425         {ns_t_rp,       "RP",           "responsible person"},
 426         {ns_t_afsdb,    "AFSDB",        "DCE or AFS server"},
 427         {ns_t_x25,      "X25",          "X25 address"},
 428         {ns_t_isdn,     "ISDN",         "ISDN address"},
 429         {ns_t_rt,       "RT",           "router"},
 430         {ns_t_nsap,     "NSAP",         "nsap address"},
 431         {ns_t_nsap_ptr, "NSAP_PTR",     "domain name pointer"},
 432         {ns_t_sig,      "SIG",          "signature"},
 433         {ns_t_key,      "KEY",          "key"},
 434         {ns_t_px,       "PX",           "mapping information"},
 435         {ns_t_gpos,     "GPOS",         "geographical position (withdrawn)"},
 436         {ns_t_aaaa,     "AAAA",         "IPv6 address"},
 437         {ns_t_loc,      "LOC",          "location"},
 438         {ns_t_nxt,      "NXT",          "next valid name (unimplemented)"},
 439         {ns_t_eid,      "EID",          "endpoint identifier (unimplemented)"},
 440         {ns_t_nimloc,   "NIMLOC",       "NIMROD locator (unimplemented)"},
 441         {ns_t_srv,      "SRV",          "server selection"},
 442         {ns_t_atma,     "ATMA",         "ATM address (unimplemented)"},
 443         {ns_t_tsig,     "TSIG",         "transaction signature"},
 444         {ns_t_ixfr,     "IXFR",         "incremental zone transfer"},
 445         {ns_t_axfr,     "AXFR",         "zone transfer"},
 446         {ns_t_zxfr,     "ZXFR",         "compressed zone transfer"},
 447         {ns_t_mailb,    "MAILB",        "mailbox-related data (deprecated)"},
 448         {ns_t_maila,    "MAILA",        "mail agent (deprecated)"},
 449         {ns_t_naptr,    "NAPTR",        "URN Naming Authority"},
 450         {ns_t_kx,       "KX",           "Key Exchange"},
 451         {ns_t_cert,     "CERT",         "Certificate"},
 452         {ns_t_any,      "ANY",          "\"any\""},
 453         {0,             NULL,           NULL}
 454 };
 455 libresolv_hidden_data_def (__p_type_syms)
 456
 457 /*
 458  * Names of DNS rcodes.
 459  */
 460 const struct res_sym __p_rcode_syms[] attribute_hidden = {
 461         {ns_r_noerror,  "NOERROR",              "no error"},
 462         {ns_r_formerr,  "FORMERR",              "format error"},
 463         {ns_r_servfail, "SERVFAIL",             "server failed"},
 464         {ns_r_nxdomain, "NXDOMAIN",             "no such domain name"},
 465         {ns_r_notimpl,  "NOTIMP",               "not implemented"},
 466         {ns_r_refused,  "REFUSED",              "refused"},
 467         {ns_r_yxdomain, "YXDOMAIN",             "domain name exists"},
 468         {ns_r_yxrrset,  "YXRRSET",              "rrset exists"},
 469         {ns_r_nxrrset,  "NXRRSET",              "rrset doesn't exist"},
 470         {ns_r_notauth,  "NOTAUTH",              "not authoritative"},
 471         {ns_r_notzone,  "NOTZONE",              "Not in zone"},
 472         {ns_r_max,      "",                     ""},
 473         {ns_r_badsig,   "BADSIG",               "bad signature"},
 474         {ns_r_badkey,   "BADKEY",               "bad key"},
 475         {ns_r_badtime,  "BADTIME",              "bad time"},
 476         {0,             NULL,                   NULL}
 477 };
 478
 479 int
 480 sym_ston(const struct res_sym *syms, const char *name, int *success) {
 481         for ((void)NULL; syms->name != 0; syms++) {
 482                 if (strcasecmp (name, syms->name) == 0) {
 483                         if (success)
 484                                 *success = 1;
 485                         return (syms->number);
 486                 }
 487         }
 488         if (success)
 489                 *success = 0;
 490         return (syms->number);          /* The default value. */
 491 }
 492
 493 const char *
 494 sym_ntos(const struct res_sym *syms, int number, int *success) {
 495         static char unname[20];
 496
 497         for ((void)NULL; syms->name != 0; syms++) {
 498                 if (number == syms->number) {
 499                         if (success)
 500                                 *success = 1;
 501                         return (syms->name);
 502                 }
 503         }
 504
 505         sprintf(unname, "%d", number);          /* XXX nonreentrant */
 506         if (success)
 507                 *success = 0;
 508         return (unname);
 509 }
 510 libresolv_hidden_def (sym_ntos)
 511
 512 const char *
 513 sym_ntop(const struct res_sym *syms, int number, int *success) {
 514         static char unname[20];
 515
 516         for ((void)NULL; syms->name != 0; syms++) {
 517                 if (number == syms->number) {
 518                         if (success)
 519                                 *success = 1;
 520                         return (syms->humanname);
 521                 }
 522         }
 523         sprintf(unname, "%d", number);          /* XXX nonreentrant */
 524         if (success)
 525                 *success = 0;
 526         return (unname);
 527 }
 528
 529 /*
 530  * Return a string for the type.
 531  */
 532 const char *
 533 p_type(int type) {
 534         return (sym_ntos(__p_type_syms, type, (int *)0));
 535 }
 536 libresolv_hidden_def (p_type)
 537
 538 /*
 539  * Return a string for the type.
 540  */
 541 const char *
 542 p_section(int section, int opcode) {
 543         const struct res_sym *symbols;
 544
 545         switch (opcode) {
 546         case ns_o_update:
 547                 symbols = __p_update_section_syms;
 548                 break;
 549         default:
 550                 symbols = __p_default_section_syms;
 551                 break;
 552         }
 553         return (sym_ntos(symbols, section, (int *)0));
 554 }
 555
 556 /*
 557  * Return a mnemonic for class.
 558  */
 559 const char *
 560 p_class(int class) {
 561         return (sym_ntos(__p_class_syms, class, (int *)0));
 562 }
 563 libresolv_hidden_def (p_class)
 564
 565 /*
 566  * Return a mnemonic for an option
 567  */
 568 const char *
 569 p_option(u_long option) {
 570         static char nbuf[40];
 571
 572         switch (option) {
 573         case RES_INIT:          return "init";
 574         case RES_DEBUG:         return "debug";
 575         case RES_AAONLY:        return "aaonly(unimpl)";
 576         case RES_USEVC:         return "usevc";
 577         case RES_PRIMARY:       return "primry(unimpl)";
 578         case RES_IGNTC:         return "igntc";
 579         case RES_RECURSE:       return "recurs";
 580         case RES_DEFNAMES:      return "defnam";
 581         case RES_STAYOPEN:      return "styopn";
 582         case RES_DNSRCH:        return "dnsrch";
 583         case RES_INSECURE1:     return "insecure1";
 584         case RES_INSECURE2:     return "insecure2";
 585         case RES_USE_INET6:     return "inet6";
 586         case RES_ROTATE:        return "rotate";
 587         case RES_NOCHECKNAME:   return "no-check-names";
 588         case RES_USEBSTRING:    return "ip6-bytstring";
 589                                 /* XXX nonreentrant */
 590         default:                sprintf(nbuf, "?0x%lx?", (u_long)option);
 591                                 return (nbuf);
 592         }
 593 }
 594 libresolv_hidden_def (p_option)
 595
 596 /*
 597  * Return a mnemonic for a time to live.
 598  */
 599 const char *
 600 p_time(u_int32_t value) {
 601         static char nbuf[40];           /* XXX nonreentrant */
 602
 603         if (ns_format_ttl(value, nbuf, sizeof nbuf) < 0)
 604                 sprintf(nbuf, "%u", value);
 605         return (nbuf);
 606 }
 607
 608 /*
 609  * Return a string for the rcode.
 610  */
 611 const char *
 612 p_rcode(int rcode) {
 613         return (sym_ntos(__p_rcode_syms, rcode, (int *)0));
 614 }
 615 libresolv_hidden_def (p_rcode)
 616
 617 /*
 618  * routines to convert between on-the-wire RR format and zone file format.
 619  * Does not contain conversion to/from decimal degrees; divide or multiply
 620  * by 60*60*1000 for that.
 621  */
 622
 623 static const unsigned int poweroften[10]=
 624   { 1, 10, 100, 1000, 10000, 100000,
 625     1000000,10000000,100000000,1000000000};
 626
 627 /* takes an XeY precision/size value, returns a string representation. */
 628 static const char *
 629 precsize_ntoa (u_int8_t prec)
 630 {
 631         static char retbuf[sizeof "90000000.00"];       /* XXX nonreentrant */
 632         unsigned long val;
 633         int mantissa, exponent;
 634
 635         mantissa = (int)((prec >> 4) & 0x0f) % 10;
 636         exponent = (int)((prec >> 0) & 0x0f) % 10;
 637
 638         val = mantissa * poweroften[exponent];
 639
 640         (void) sprintf(retbuf, "%ld.%.2ld", val/100, val%100);
 641         return (retbuf);
 642 }
 643
 644 /* converts ascii size/precision X * 10**Y(cm) to 0xXY.  moves pointer. */
 645 static u_int8_t
 646 precsize_aton (const char **strptr)
 647 {
 648         unsigned int mval = 0, cmval = 0;
 649         u_int8_t retval = 0;
 650         const char *cp;
 651         int exponent;
 652         int mantissa;
 653
 654         cp = *strptr;
 655
 656         while (isdigit(*cp))
 657                 mval = mval * 10 + (*cp++ - '0');
 658
 659         if (*cp == '.') {               /* centimeters */
 660                 cp++;
 661                 if (isdigit(*cp)) {
 662                         cmval = (*cp++ - '0') * 10;
 663                         if (isdigit(*cp)) {
 664                                 cmval += (*cp++ - '0');
 665                         }
 666                 }
 667         }
 668         cmval = (mval * 100) + cmval;
 669
 670         for (exponent = 0; exponent < 9; exponent++)
 671                 if (cmval < poweroften[exponent+1])
 672                         break;
 673
 674         mantissa = cmval / poweroften[exponent];
 675         if (mantissa > 9)
 676                 mantissa = 9;
 677
 678         retval = (mantissa << 4) | exponent;
 679
 680         *strptr = cp;
 681
 682         return (retval);
 683 }
 684
 685 /* converts ascii lat/lon to unsigned encoded 32-bit number.  moves pointer. */
 686 static u_int32_t
 687 latlon2ul (const char **latlonstrptr, int *which)
 688 {
 689         const char *cp;
 690         u_int32_t retval;
 691         int deg = 0, min = 0, secs = 0, secsfrac = 0;
 692
 693         cp = *latlonstrptr;
 694
 695         while (isdigit(*cp))
 696                 deg = deg * 10 + (*cp++ - '0');
 697
 698         while (isspace(*cp))
 699                 cp++;
 700
 701         if (!(isdigit(*cp)))
 702                 goto fndhemi;
 703
 704         while (isdigit(*cp))
 705                 min = min * 10 + (*cp++ - '0');
 706
 707         while (isspace(*cp))
 708                 cp++;
 709
 710         if (!(isdigit(*cp)))
 711                 goto fndhemi;
 712
 713         while (isdigit(*cp))
 714                 secs = secs * 10 + (*cp++ - '0');
 715
 716         if (*cp == '.') {               /* decimal seconds */
 717                 cp++;
 718                 if (isdigit(*cp)) {
 719                         secsfrac = (*cp++ - '0') * 100;
 720                         if (isdigit(*cp)) {
 721                                 secsfrac += (*cp++ - '0') * 10;
 722                                 if (isdigit(*cp)) {
 723                                         secsfrac += (*cp++ - '0');
 724                                 }
 725                         }
 726                 }
 727         }
 728
 729         while (!isspace(*cp))   /* if any trailing garbage */
 730                 cp++;
 731
 732         while (isspace(*cp))
 733                 cp++;
 734
 735  fndhemi:
 736         switch (*cp) {
 737         case 'N': case 'n':
 738         case 'E': case 'e':
 739                 retval = ((unsigned)1<<31)
 740                         + (((((deg * 60) + min) * 60) + secs) * 1000)
 741                         + secsfrac;
 742                 break;
 743         case 'S': case 's':
 744         case 'W': case 'w':
 745                 retval = ((unsigned)1<<31)
 746                         - (((((deg * 60) + min) * 60) + secs) * 1000)
 747                         - secsfrac;
 748                 break;
 749         default:
 750                 retval = 0;     /* invalid value -- indicates error */
 751                 break;
 752         }
 753
 754         switch (*cp) {
 755         case 'N': case 'n':
 756         case 'S': case 's':
 757                 *which = 1;     /* latitude */
 758                 break;
 759         case 'E': case 'e':
 760         case 'W': case 'w':
 761                 *which = 2;     /* longitude */
 762                 break;
 763         default:
 764                 *which = 0;     /* error */
 765                 break;
 766         }
 767
 768         cp++;                   /* skip the hemisphere */
 769
 770         while (!isspace(*cp))   /* if any trailing garbage */
 771                 cp++;
 772
 773         while (isspace(*cp))    /* move to next field */
 774                 cp++;
 775
 776         *latlonstrptr = cp;
 777
 778         return (retval);
 779 }
 780
 781 /* converts a zone file representation in a string to an RDATA on-the-wire
 782  * representation. */
 783 int
 784 loc_aton(ascii, binary)
 785         const char *ascii;
 786         u_char *binary;
 787 {
 788         const char *cp, *maxcp;
 789         u_char *bcp;
 790
 791         u_int32_t latit = 0, longit = 0, alt = 0;
 792         u_int32_t lltemp1 = 0, lltemp2 = 0;
 793         int altmeters = 0, altfrac = 0, altsign = 1;
 794         u_int8_t hp = 0x16;     /* default = 1e6 cm = 10000.00m = 10km */
 795         u_int8_t vp = 0x13;     /* default = 1e3 cm = 10.00m */
 796         u_int8_t siz = 0x12;    /* default = 1e2 cm = 1.00m */
 797         int which1 = 0, which2 = 0;
 798
 799         cp = ascii;
 800         maxcp = cp + strlen(ascii);
 801
 802         lltemp1 = latlon2ul(&cp, &which1);
 803
 804         lltemp2 = latlon2ul(&cp, &which2);
 805
 806         switch (which1 + which2) {
 807         case 3:                 /* 1 + 2, the only valid combination */
 808                 if ((which1 == 1) && (which2 == 2)) { /* normal case */
 809                         latit = lltemp1;
 810                         longit = lltemp2;
 811                 } else if ((which1 == 2) && (which2 == 1)) { /* reversed */
 812                         longit = lltemp1;
 813                         latit = lltemp2;
 814                 } else {        /* some kind of brokenness */
 815                         return (0);
 816                 }
 817                 break;
 818         default:                /* we didn't get one of each */
 819                 return (0);
 820         }
 821
 822         /* altitude */
 823         if (*cp == '-') {
 824                 altsign = -1;
 825                 cp++;
 826         }
 827
 828         if (*cp == '+')
 829                 cp++;
 830
 831         while (isdigit(*cp))
 832                 altmeters = altmeters * 10 + (*cp++ - '0');
 833
 834         if (*cp == '.') {               /* decimal meters */
 835                 cp++;
 836                 if (isdigit(*cp)) {
 837                         altfrac = (*cp++ - '0') * 10;
 838                         if (isdigit(*cp)) {
 839                                 altfrac += (*cp++ - '0');
 840                         }
 841                 }
 842         }
 843
 844         alt = (10000000 + (altsign * (altmeters * 100 + altfrac)));
 845
 846         while (!isspace(*cp) && (cp < maxcp)) /* if trailing garbage or m */
 847                 cp++;
 848
 849         while (isspace(*cp) && (cp < maxcp))
 850                 cp++;
 851
 852         if (cp >= maxcp)
 853                 goto defaults;
 854
 855         siz = precsize_aton(&cp);
 856
 857         while (!isspace(*cp) && (cp < maxcp))   /* if trailing garbage or m */
 858                 cp++;
 859
 860         while (isspace(*cp) && (cp < maxcp))
 861                 cp++;
 862
 863         if (cp >= maxcp)
 864                 goto defaults;
 865
 866         hp = precsize_aton(&cp);
 867
 868         while (!isspace(*cp) && (cp < maxcp))   /* if trailing garbage or m */
 869                 cp++;
 870
 871         while (isspace(*cp) && (cp < maxcp))
 872                 cp++;
 873
 874         if (cp >= maxcp)
 875                 goto defaults;
 876
 877         vp = precsize_aton(&cp);
 878
 879  defaults:
 880
 881         bcp = binary;
 882         *bcp++ = (u_int8_t) 0;  /* version byte */
 883         *bcp++ = siz;
 884         *bcp++ = hp;
 885         *bcp++ = vp;
 886         PUTLONG(latit,bcp);
 887         PUTLONG(longit,bcp);
 888         PUTLONG(alt,bcp);
 889
 890         return (16);            /* size of RR in octets */
 891 }
 892
 893 /* takes an on-the-wire LOC RR and formats it in a human readable format. */
 894 const char *
 895 loc_ntoa(binary, ascii)
 896         const u_char *binary;
 897         char *ascii;
 898 {
 899         static const char error[] = "?";
 900         static char tmpbuf[sizeof
 901 "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"];
 902         const u_char *cp = binary;
 903
 904         int latdeg, latmin, latsec, latsecfrac;
 905         int longdeg, longmin, longsec, longsecfrac;
 906         char northsouth, eastwest;
 907         int altmeters, altfrac, altsign;
 908
 909         const u_int32_t referencealt = 100000 * 100;
 910
 911         int32_t latval, longval, altval;
 912         u_int32_t templ;
 913         u_int8_t sizeval, hpval, vpval, versionval;
 914
 915         char *sizestr, *hpstr, *vpstr;
 916
 917         versionval = *cp++;
 918
 919         if (ascii == NULL)
 920                 ascii = tmpbuf;
 921
 922         if (versionval) {
 923                 (void) sprintf(ascii, "; error: unknown LOC RR version");
 924                 return (ascii);
 925         }
 926
 927         sizeval = *cp++;
 928
 929         hpval = *cp++;
 930         vpval = *cp++;
 931
 932         GETLONG(templ, cp);
 933         latval = (templ - ((unsigned)1<<31));
 934
 935         GETLONG(templ, cp);
 936         longval = (templ - ((unsigned)1<<31));
 937
 938         GETLONG(templ, cp);
 939         if (templ < referencealt) { /* below WGS 84 spheroid */
 940                 altval = referencealt - templ;
 941                 altsign = -1;
 942         } else {
 943                 altval = templ - referencealt;
 944                 altsign = 1;
 945         }
 946
 947         if (latval < 0) {
 948                 northsouth = 'S';
 949                 latval = -latval;
 950         } else
 951                 northsouth = 'N';
 952
 953         latsecfrac = latval % 1000;
 954         latval = latval / 1000;
 955         latsec = latval % 60;
 956         latval = latval / 60;
 957         latmin = latval % 60;
 958         latval = latval / 60;
 959         latdeg = latval;
 960
 961         if (longval < 0) {
 962                 eastwest = 'W';
 963                 longval = -longval;
 964         } else
 965                 eastwest = 'E';
 966
 967         longsecfrac = longval % 1000;
 968         longval = longval / 1000;
 969         longsec = longval % 60;
 970         longval = longval / 60;
 971         longmin = longval % 60;
 972         longval = longval / 60;
 973         longdeg = longval;
 974
 975         altfrac = altval % 100;
 976         altmeters = (altval / 100) * altsign;
 977
 978         if ((sizestr = strdup(precsize_ntoa(sizeval))) == NULL)
 979                 sizestr = (char *) error;
 980         if ((hpstr = strdup(precsize_ntoa(hpval))) == NULL)
 981                 hpstr = (char *) error;
 982         if ((vpstr = strdup(precsize_ntoa(vpval))) == NULL)
 983                 vpstr = (char *) error;
 984
 985         sprintf(ascii,
 986               "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %d.%.2dm %sm %sm %sm",
 987                 latdeg, latmin, latsec, latsecfrac, northsouth,
 988                 longdeg, longmin, longsec, longsecfrac, eastwest,
 989                 altmeters, altfrac, sizestr, hpstr, vpstr);
 990
 991         if (sizestr != (char *) error)
 992                 free(sizestr);
 993         if (hpstr != (char *) error)
 994                 free(hpstr);
 995         if (vpstr != (char *) error)
 996                 free(vpstr);
 997
 998         return (ascii);
 999 }
1000 libresolv_hidden_def (loc_ntoa)
1001
1002
1003 /* Return the number of DNS hierarchy levels in the name. */
1004 int
1005 dn_count_labels(const char *name) {
1006         int i, len, count;
1007
1008         len = strlen(name);
1009         for (i = 0, count = 0; i < len; i++) {
1010                 /* XXX need to check for \. or use named's nlabels(). */
1011                 if (name[i] == '.')
1012                         count++;
1013         }
1014
1015         /* don't count initial wildcard */
1016         if (name[0] == '*')
1017                 if (count)
1018                         count--;
1019
1020         /* don't count the null label for root. */
1021         /* if terminating '.' not found, must adjust */
1022         /* count to include last label */
1023         if (len > 0 && name[len-1] != '.')
1024                 count++;
1025         return (count);
1026 }
1027
1028
1029 /*
1030  * Make dates expressed in seconds-since-Jan-1-1970 easy to read.
1031  * SIG records are required to be printed like this, by the Secure DNS RFC.
1032  */
1033 char *
1034 p_secstodate (u_long secs) {
1035         /* XXX nonreentrant */
1036         static char output[15];         /* YYYYMMDDHHMMSS and null */
1037         time_t clock = secs;
1038         struct tm *time;
1039
1040 #ifdef HAVE_TIME_R
1041         struct tm timebuf;
1042
1043         time = gmtime_r(&clock, &timebuf);
1044 #else
1045         time = gmtime(&clock);
1046 #endif
1047         time->tm_year += 1900;
1048         time->tm_mon += 1;
1049         sprintf(output, "%04d%02d%02d%02d%02d%02d",
1050                 time->tm_year, time->tm_mon, time->tm_mday,
1051                 time->tm_hour, time->tm_min, time->tm_sec);
1052         return (output);
1053 }