contrib/bind-9.5.2/bin/dig/host.c

   1 /*
   2  * Copyright (C) 2004-2007, 2009  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 2000-2003  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  10  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  11  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  12  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  13  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  14  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  15  * PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 /* $Id: host.c,v 1.116.12.3 2009/09/08 23:28:40 marka Exp $ */
  19
  20 /*! \file */
  21
  22 #include <config.h>
  23 #include <stdlib.h>
  24 #include <limits.h>
  25
  26 #ifdef HAVE_LOCALE_H
  27 #include <locale.h>
  28 #endif
  29
  30 #ifdef WITH_IDN
  31 #include <idn/result.h>
  32 #include <idn/log.h>
  33 #include <idn/resconf.h>
  34 #include <idn/api.h>
  35 #endif
  36
  37 #include <isc/app.h>
  38 #include <isc/commandline.h>
  39 #include <isc/netaddr.h>
  40 #include <isc/print.h>
  41 #include <isc/string.h>
  42 #include <isc/util.h>
  43 #include <isc/task.h>
  44 #include <isc/stdlib.h>
  45
  46 #include <dns/byaddr.h>
  47 #include <dns/fixedname.h>
  48 #include <dns/message.h>
  49 #include <dns/name.h>
  50 #include <dns/rdata.h>
  51 #include <dns/rdataclass.h>
  52 #include <dns/rdataset.h>
  53 #include <dns/rdatatype.h>
  54 #include <dns/rdatastruct.h>
  55
  56 #include <dig/dig.h>
  57
  58 static isc_boolean_t short_form = ISC_TRUE, listed_server = ISC_FALSE;
  59 static isc_boolean_t default_lookups = ISC_TRUE;
  60 static int seen_error = -1;
  61 static isc_boolean_t list_addresses = ISC_TRUE;
  62 static dns_rdatatype_t list_type = dns_rdatatype_a;
  63 static isc_boolean_t printed_server = ISC_FALSE;
  64
  65 static const char *opcodetext[] = {
  66         "QUERY",
  67         "IQUERY",
  68         "STATUS",
  69         "RESERVED3",
  70         "NOTIFY",
  71         "UPDATE",
  72         "RESERVED6",
  73         "RESERVED7",
  74         "RESERVED8",
  75         "RESERVED9",
  76         "RESERVED10",
  77         "RESERVED11",
  78         "RESERVED12",
  79         "RESERVED13",
  80         "RESERVED14",
  81         "RESERVED15"
  82 };
  83
  84 static const char *rcodetext[] = {
  85         "NOERROR",
  86         "FORMERR",
  87         "SERVFAIL",
  88         "NXDOMAIN",
  89         "NOTIMP",
  90         "REFUSED",
  91         "YXDOMAIN",
  92         "YXRRSET",
  93         "NXRRSET",
  94         "NOTAUTH",
  95         "NOTZONE",
  96         "RESERVED11",
  97         "RESERVED12",
  98         "RESERVED13",
  99         "RESERVED14",
 100         "RESERVED15",
 101         "BADVERS"
 102 };
 103
 104 struct rtype {
 105         unsigned int type;
 106         const char *text;
 107 };
 108
 109 struct rtype rtypes[] = {
 110         { 1,    "has address" },
 111         { 2,    "name server" },
 112         { 5,    "is an alias for" },
 113         { 11,   "has well known services" },
 114         { 12,   "domain name pointer" },
 115         { 13,   "host information" },
 116         { 15,   "mail is handled by" },
 117         { 16,   "descriptive text" },
 118         { 19,   "x25 address" },
 119         { 20,   "ISDN address" },
 120         { 24,   "has signature" },
 121         { 25,   "has key" },
 122         { 28,   "has IPv6 address" },
 123         { 29,   "location" },
 124         { 0, NULL }
 125 };
 126
 127 static char *
 128 rcode_totext(dns_rcode_t rcode)
 129 {
 130         static char buf[sizeof("?65535")];
 131         union {
 132                 const char *consttext;
 133                 char *deconsttext;
 134         } totext;
 135
 136         if (rcode >= (sizeof(rcodetext)/sizeof(rcodetext[0]))) {
 137                 snprintf(buf, sizeof(buf), "?%u", rcode);
 138                 totext.deconsttext = buf;
 139         } else
 140                 totext.consttext = rcodetext[rcode];
 141         return totext.deconsttext;
 142 }
 143
 144 static void
 145 show_usage(void) {
 146         fputs(
 147 "Usage: host [-aCdlriTwv] [-c class] [-N ndots] [-t type] [-W time]\n"
 148 "            [-R number] [-m flag] hostname [server]\n"
 149 "       -a is equivalent to -v -t ANY\n"
 150 "       -c specifies query class for non-IN data\n"
 151 "       -C compares SOA records on authoritative nameservers\n"
 152 "       -d is equivalent to -v\n"
 153 "       -l lists all hosts in a domain, using AXFR\n"
 154 "       -i IP6.INT reverse lookups\n"
 155 "       -N changes the number of dots allowed before root lookup is done\n"
 156 "       -r disables recursive processing\n"
 157 "       -R specifies number of retries for UDP packets\n"
 158 "       -s a SERVFAIL response should stop query\n"
 159 "       -t specifies the query type\n"
 160 "       -T enables TCP/IP mode\n"
 161 "       -v enables verbose output\n"
 162 "       -w specifies to wait forever for a reply\n"
 163 "       -W specifies how long to wait for a reply\n"
 164 "       -4 use IPv4 query transport only\n"
 165 "       -6 use IPv6 query transport only\n"
 166 "       -m set memory debugging flag (trace|record|usage)\n", stderr);
 167         exit(1);
 168 }
 169
 170 void
 171 dighost_shutdown(void) {
 172         isc_app_shutdown();
 173 }
 174
 175 void
 176 received(int bytes, isc_sockaddr_t *from, dig_query_t *query) {
 177         isc_time_t now;
 178         int diff;
 179
 180         if (!short_form) {
 181                 char fromtext[ISC_SOCKADDR_FORMATSIZE];
 182                 isc_sockaddr_format(from, fromtext, sizeof(fromtext));
 183                 TIME_NOW(&now);
 184                 diff = (int) isc_time_microdiff(&now, &query->time_sent);
 185                 printf("Received %u bytes from %s in %d ms\n",
 186                        bytes, fromtext, diff/1000);
 187         }
 188 }
 189
 190 void
 191 trying(char *frm, dig_lookup_t *lookup) {
 192         UNUSED(lookup);
 193
 194         if (!short_form)
 195                 printf("Trying \"%s\"\n", frm);
 196 }
 197
 198 static void
 199 say_message(dns_name_t *name, const char *msg, dns_rdata_t *rdata,
 200             dig_query_t *query)
 201 {
 202         isc_buffer_t *b = NULL;
 203         char namestr[DNS_NAME_FORMATSIZE];
 204         isc_region_t r;
 205         isc_result_t result;
 206         unsigned int bufsize = BUFSIZ;
 207
 208         dns_name_format(name, namestr, sizeof(namestr));
 209  retry:
 210         result = isc_buffer_allocate(mctx, &b, bufsize);
 211         check_result(result, "isc_buffer_allocate");
 212         result = dns_rdata_totext(rdata, NULL, b);
 213         if (result == ISC_R_NOSPACE) {
 214                 isc_buffer_free(&b);
 215                 bufsize *= 2;
 216                 goto retry;
 217         }
 218         check_result(result, "dns_rdata_totext");
 219         isc_buffer_usedregion(b, &r);
 220         if (query->lookup->identify_previous_line) {
 221                 printf("Nameserver %s:\n\t",
 222                         query->servname);
 223         }
 224         printf("%s %s %.*s", namestr,
 225                msg, (int)r.length, (char *)r.base);
 226         if (query->lookup->identify) {
 227                 printf(" on server %s", query->servname);
 228         }
 229         printf("\n");
 230         isc_buffer_free(&b);
 231 }
 232 #ifdef DIG_SIGCHASE
 233 /* Just for compatibility : not use in host program */
 234 isc_result_t
 235 printrdataset(dns_name_t *owner_name, dns_rdataset_t *rdataset,
 236               isc_buffer_t *target)
 237 {
 238   UNUSED(owner_name);
 239   UNUSED(rdataset);
 240   UNUSED(target);
 241   return(ISC_FALSE);
 242 }
 243 #endif
 244 static isc_result_t
 245 printsection(dns_message_t *msg, dns_section_t sectionid,
 246              const char *section_name, isc_boolean_t headers,
 247              dig_query_t *query)
 248 {
 249         dns_name_t *name, *print_name;
 250         dns_rdataset_t *rdataset;
 251         dns_rdata_t rdata = DNS_RDATA_INIT;
 252         isc_buffer_t target;
 253         isc_result_t result, loopresult;
 254         isc_region_t r;
 255         dns_name_t empty_name;
 256         char t[4096];
 257         isc_boolean_t first;
 258         isc_boolean_t no_rdata;
 259
 260         if (sectionid == DNS_SECTION_QUESTION)
 261                 no_rdata = ISC_TRUE;
 262         else
 263                 no_rdata = ISC_FALSE;
 264
 265         if (headers)
 266                 printf(";; %s SECTION:\n", section_name);
 267
 268         dns_name_init(&empty_name, NULL);
 269
 270         result = dns_message_firstname(msg, sectionid);
 271         if (result == ISC_R_NOMORE)
 272                 return (ISC_R_SUCCESS);
 273         else if (result != ISC_R_SUCCESS)
 274                 return (result);
 275
 276         for (;;) {
 277                 name = NULL;
 278                 dns_message_currentname(msg, sectionid, &name);
 279
 280                 isc_buffer_init(&target, t, sizeof(t));
 281                 first = ISC_TRUE;
 282                 print_name = name;
 283
 284                 for (rdataset = ISC_LIST_HEAD(name->list);
 285                      rdataset != NULL;
 286                      rdataset = ISC_LIST_NEXT(rdataset, link)) {
 287                         if (query->lookup->rdtype == dns_rdatatype_axfr &&
 288                             !((!list_addresses &&
 289                                (list_type == dns_rdatatype_any ||
 290                                 rdataset->type == list_type)) ||
 291                               (list_addresses &&
 292                                (rdataset->type == dns_rdatatype_a ||
 293                                 rdataset->type == dns_rdatatype_aaaa ||
 294                                 rdataset->type == dns_rdatatype_ns ||
 295                                 rdataset->type == dns_rdatatype_ptr))))
 296                                 continue;
 297                         if (!short_form) {
 298                                 result = dns_rdataset_totext(rdataset,
 299                                                              print_name,
 300                                                              ISC_FALSE,
 301                                                              no_rdata,
 302                                                              &target);
 303                                 if (result != ISC_R_SUCCESS)
 304                                         return (result);
 305 #ifdef USEINITALWS
 306                                 if (first) {
 307                                         print_name = &empty_name;
 308                                         first = ISC_FALSE;
 309                                 }
 310 #else
 311                                 UNUSED(first); /* Shut up compiler. */
 312 #endif
 313                         } else {
 314                                 loopresult = dns_rdataset_first(rdataset);
 315                                 while (loopresult == ISC_R_SUCCESS) {
 316                                         struct rtype *t;
 317                                         const char *rtt;
 318                                         char typebuf[DNS_RDATATYPE_FORMATSIZE];
 319                                         char typebuf2[DNS_RDATATYPE_FORMATSIZE
 320                                                      + 20];
 321                                         dns_rdataset_current(rdataset, &rdata);
 322
 323                                         for (t = rtypes; t->text != NULL; t++) {
 324                                                 if (t->type == rdata.type) {
 325                                                         rtt = t->text;
 326                                                         goto found;
 327                                                 }
 328                                         }
 329
 330                                         dns_rdatatype_format(rdata.type,
 331                                                              typebuf,
 332                                                              sizeof(typebuf));
 333                                         snprintf(typebuf2, sizeof(typebuf2),
 334                                                  "has %s record", typebuf);
 335                                         rtt = typebuf2;
 336                                 found:
 337                                         say_message(print_name, rtt,
 338                                                     &rdata, query);
 339                                         dns_rdata_reset(&rdata);
 340                                         loopresult =
 341                                                 dns_rdataset_next(rdataset);
 342                                 }
 343                         }
 344                 }
 345                 if (!short_form) {
 346                         isc_buffer_usedregion(&target, &r);
 347                         if (no_rdata)
 348                                 printf(";%.*s", (int)r.length,
 349                                        (char *)r.base);
 350                         else
 351                                 printf("%.*s", (int)r.length, (char *)r.base);
 352                 }
 353
 354                 result = dns_message_nextname(msg, sectionid);
 355                 if (result == ISC_R_NOMORE)
 356                         break;
 357                 else if (result != ISC_R_SUCCESS)
 358                         return (result);
 359         }
 360
 361         return (ISC_R_SUCCESS);
 362 }
 363
 364 static isc_result_t
 365 printrdata(dns_message_t *msg, dns_rdataset_t *rdataset, dns_name_t *owner,
 366            const char *set_name, isc_boolean_t headers)
 367 {
 368         isc_buffer_t target;
 369         isc_result_t result;
 370         isc_region_t r;
 371         char t[4096];
 372
 373         UNUSED(msg);
 374         if (headers)
 375                 printf(";; %s SECTION:\n", set_name);
 376
 377         isc_buffer_init(&target, t, sizeof(t));
 378
 379         result = dns_rdataset_totext(rdataset, owner, ISC_FALSE, ISC_FALSE,
 380                                      &target);
 381         if (result != ISC_R_SUCCESS)
 382                 return (result);
 383         isc_buffer_usedregion(&target, &r);
 384         printf("%.*s", (int)r.length, (char *)r.base);
 385
 386         return (ISC_R_SUCCESS);
 387 }
 388
 389 static void
 390 chase_cnamechain(dns_message_t *msg, dns_name_t *qname) {
 391         isc_result_t result;
 392         dns_rdataset_t *rdataset;
 393         dns_rdata_cname_t cname;
 394         dns_rdata_t rdata = DNS_RDATA_INIT;
 395         unsigned int i = msg->counts[DNS_SECTION_ANSWER];
 396
 397         while (i-- > 0) {
 398                 rdataset = NULL;
 399                 result = dns_message_findname(msg, DNS_SECTION_ANSWER, qname,
 400                                               dns_rdatatype_cname, 0, NULL,
 401                                               &rdataset);
 402                 if (result != ISC_R_SUCCESS)
 403                         return;
 404                 result = dns_rdataset_first(rdataset);
 405                 check_result(result, "dns_rdataset_first");
 406                 dns_rdata_reset(&rdata);
 407                 dns_rdataset_current(rdataset, &rdata);
 408                 result = dns_rdata_tostruct(&rdata, &cname, NULL);
 409                 check_result(result, "dns_rdata_tostruct");
 410                 dns_name_copy(&cname.cname, qname, NULL);
 411                 dns_rdata_freestruct(&cname);
 412         }
 413 }
 414
 415 isc_result_t
 416 printmessage(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers) {
 417         isc_boolean_t did_flag = ISC_FALSE;
 418         dns_rdataset_t *opt, *tsig = NULL;
 419         dns_name_t *tsigname;
 420         isc_result_t result = ISC_R_SUCCESS;
 421         int force_error;
 422
 423         UNUSED(headers);
 424
 425         /*
 426          * We get called multiple times.
 427          * Preserve any existing error status.
 428          */
 429         force_error = (seen_error == 1) ? 1 : 0;
 430         seen_error = 1;
 431         if (listed_server && !printed_server) {
 432                 char sockstr[ISC_SOCKADDR_FORMATSIZE];
 433
 434                 printf("Using domain server:\n");
 435                 printf("Name: %s\n", query->userarg);
 436                 isc_sockaddr_format(&query->sockaddr, sockstr,
 437                                     sizeof(sockstr));
 438                 printf("Address: %s\n", sockstr);
 439                 printf("Aliases: \n\n");
 440                 printed_server = ISC_TRUE;
 441         }
 442
 443         if (msg->rcode != 0) {
 444                 char namestr[DNS_NAME_FORMATSIZE];
 445                 dns_name_format(query->lookup->name, namestr, sizeof(namestr));
 446                 printf("Host %s not found: %d(%s)\n",
 447                        (msg->rcode != dns_rcode_nxdomain) ? namestr :
 448                        query->lookup->textname, msg->rcode,
 449                        rcode_totext(msg->rcode));
 450                 return (ISC_R_SUCCESS);
 451         }
 452
 453         if (default_lookups && query->lookup->rdtype == dns_rdatatype_a) {
 454                 char namestr[DNS_NAME_FORMATSIZE];
 455                 dig_lookup_t *lookup;
 456                 dns_fixedname_t fixed;
 457                 dns_name_t *name;
 458
 459                 /* Add AAAA and MX lookups. */
 460                 dns_fixedname_init(&fixed);
 461                 name = dns_fixedname_name(&fixed);
 462                 dns_name_copy(query->lookup->name, name, NULL);
 463                 chase_cnamechain(msg, name);
 464                 dns_name_format(name, namestr, sizeof(namestr));
 465                 lookup = clone_lookup(query->lookup, ISC_FALSE);
 466                 if (lookup != NULL) {
 467                         strncpy(lookup->textname, namestr,
 468                                 sizeof(lookup->textname));
 469                         lookup->textname[sizeof(lookup->textname)-1] = 0;
 470                         lookup->rdtype = dns_rdatatype_aaaa;
 471                         lookup->rdtypeset = ISC_TRUE;
 472                         lookup->origin = NULL;
 473                         lookup->retries = tries;
 474                         ISC_LIST_APPEND(lookup_list, lookup, link);
 475                 }
 476                 lookup = clone_lookup(query->lookup, ISC_FALSE);
 477                 if (lookup != NULL) {
 478                         strncpy(lookup->textname, namestr,
 479                                 sizeof(lookup->textname));
 480                         lookup->textname[sizeof(lookup->textname)-1] = 0;
 481                         lookup->rdtype = dns_rdatatype_mx;
 482                         lookup->rdtypeset = ISC_TRUE;
 483                         lookup->origin = NULL;
 484                         lookup->retries = tries;
 485                         ISC_LIST_APPEND(lookup_list, lookup, link);
 486                 }
 487         }
 488
 489         if (!short_form) {
 490                 printf(";; ->>HEADER<<- opcode: %s, status: %s, id: %u\n",
 491                        opcodetext[msg->opcode], rcode_totext(msg->rcode),
 492                        msg->id);
 493                 printf(";; flags: ");
 494                 if ((msg->flags & DNS_MESSAGEFLAG_QR) != 0) {
 495                         printf("qr");
 496                         did_flag = ISC_TRUE;
 497                 }
 498                 if ((msg->flags & DNS_MESSAGEFLAG_AA) != 0) {
 499                         printf("%saa", did_flag ? " " : "");
 500                         did_flag = ISC_TRUE;
 501                 }
 502                 if ((msg->flags & DNS_MESSAGEFLAG_TC) != 0) {
 503                         printf("%stc", did_flag ? " " : "");
 504                         did_flag = ISC_TRUE;
 505                 }
 506                 if ((msg->flags & DNS_MESSAGEFLAG_RD) != 0) {
 507                         printf("%srd", did_flag ? " " : "");
 508                         did_flag = ISC_TRUE;
 509                 }
 510                 if ((msg->flags & DNS_MESSAGEFLAG_RA) != 0) {
 511                         printf("%sra", did_flag ? " " : "");
 512                         did_flag = ISC_TRUE;
 513                 }
 514                 if ((msg->flags & DNS_MESSAGEFLAG_AD) != 0) {
 515                         printf("%sad", did_flag ? " " : "");
 516                         did_flag = ISC_TRUE;
 517                 }
 518                 if ((msg->flags & DNS_MESSAGEFLAG_CD) != 0) {
 519                         printf("%scd", did_flag ? " " : "");
 520                         did_flag = ISC_TRUE;
 521                 }
 522                 printf("; QUERY: %u, ANSWER: %u, "
 523                        "AUTHORITY: %u, ADDITIONAL: %u\n",
 524                        msg->counts[DNS_SECTION_QUESTION],
 525                        msg->counts[DNS_SECTION_ANSWER],
 526                        msg->counts[DNS_SECTION_AUTHORITY],
 527                        msg->counts[DNS_SECTION_ADDITIONAL]);
 528                 opt = dns_message_getopt(msg);
 529                 if (opt != NULL)
 530                         printf(";; EDNS: version: %u, udp=%u\n",
 531                                (unsigned int)((opt->ttl & 0x00ff0000) >> 16),
 532                                (unsigned int)opt->rdclass);
 533                 tsigname = NULL;
 534                 tsig = dns_message_gettsig(msg, &tsigname);
 535                 if (tsig != NULL)
 536                         printf(";; PSEUDOSECTIONS: TSIG\n");
 537         }
 538         if (! ISC_LIST_EMPTY(msg->sections[DNS_SECTION_QUESTION]) &&
 539             !short_form) {
 540                 printf("\n");
 541                 result = printsection(msg, DNS_SECTION_QUESTION, "QUESTION",
 542                                       ISC_TRUE, query);
 543                 if (result != ISC_R_SUCCESS)
 544                         return (result);
 545         }
 546         if (! ISC_LIST_EMPTY(msg->sections[DNS_SECTION_ANSWER])) {
 547                 if (!short_form)
 548                         printf("\n");
 549                 result = printsection(msg, DNS_SECTION_ANSWER, "ANSWER",
 550                                       ISC_TF(!short_form), query);
 551                 if (result != ISC_R_SUCCESS)
 552                         return (result);
 553         }
 554
 555         if (! ISC_LIST_EMPTY(msg->sections[DNS_SECTION_AUTHORITY]) &&
 556             !short_form) {
 557                 printf("\n");
 558                 result = printsection(msg, DNS_SECTION_AUTHORITY, "AUTHORITY",
 559                                       ISC_TRUE, query);
 560                 if (result != ISC_R_SUCCESS)
 561                         return (result);
 562         }
 563         if (! ISC_LIST_EMPTY(msg->sections[DNS_SECTION_ADDITIONAL]) &&
 564             !short_form) {
 565                 printf("\n");
 566                 result = printsection(msg, DNS_SECTION_ADDITIONAL,
 567                                       "ADDITIONAL", ISC_TRUE, query);
 568                 if (result != ISC_R_SUCCESS)
 569                         return (result);
 570         }
 571         if ((tsig != NULL) && !short_form) {
 572                 printf("\n");
 573                 result = printrdata(msg, tsig, tsigname,
 574                                     "PSEUDOSECTION TSIG", ISC_TRUE);
 575                 if (result != ISC_R_SUCCESS)
 576                         return (result);
 577         }
 578         if (!short_form)
 579                 printf("\n");
 580
 581         if (short_form && !default_lookups &&
 582             ISC_LIST_EMPTY(msg->sections[DNS_SECTION_ANSWER])) {
 583                 char namestr[DNS_NAME_FORMATSIZE];
 584                 char typestr[DNS_RDATATYPE_FORMATSIZE];
 585                 dns_name_format(query->lookup->name, namestr, sizeof(namestr));
 586                 dns_rdatatype_format(query->lookup->rdtype, typestr,
 587                                      sizeof(typestr));
 588                 printf("%s has no %s record\n", namestr, typestr);
 589         }
 590         seen_error = force_error;
 591         return (result);
 592 }
 593
 594 static const char * optstring = "46ac:dilnm:rst:vwCDN:R:TW:";
 595
 596 static void
 597 pre_parse_args(int argc, char **argv) {
 598         int c;
 599
 600         while ((c = isc_commandline_parse(argc, argv, optstring)) != -1) {
 601                 switch (c) {
 602                 case 'm':
 603                         memdebugging = ISC_TRUE;
 604                         if (strcasecmp("trace", isc_commandline_argument) == 0)
 605                                 isc_mem_debugging |= ISC_MEM_DEBUGTRACE;
 606                         else if (!strcasecmp("record",
 607                                              isc_commandline_argument) == 0)
 608                                 isc_mem_debugging |= ISC_MEM_DEBUGRECORD;
 609                         else if (strcasecmp("usage",
 610                                             isc_commandline_argument) == 0)
 611                                 isc_mem_debugging |= ISC_MEM_DEBUGUSAGE;
 612                         break;
 613
 614                 case '4': break;
 615                 case '6': break;
 616                 case 'a': break;
 617                 case 'c': break;
 618                 case 'd': break;
 619                 case 'i': break;
 620                 case 'l': break;
 621                 case 'n': break;
 622                 case 'r': break;
 623                 case 's': break;
 624                 case 't': break;
 625                 case 'v': break;
 626                 case 'w': break;
 627                 case 'C': break;
 628                 case 'D': break;
 629                 case 'N': break;
 630                 case 'R': break;
 631                 case 'T': break;
 632                 case 'W': break;
 633                 default:
 634                         show_usage();
 635                 }
 636         }
 637         isc_commandline_reset = ISC_TRUE;
 638         isc_commandline_index = 1;
 639 }
 640
 641 static void
 642 parse_args(isc_boolean_t is_batchfile, int argc, char **argv) {
 643         char hostname[MXNAME];
 644         dig_lookup_t *lookup;
 645         int c;
 646         char store[MXNAME];
 647         isc_textregion_t tr;
 648         isc_result_t result = ISC_R_SUCCESS;
 649         dns_rdatatype_t rdtype;
 650         dns_rdataclass_t rdclass;
 651         isc_uint32_t serial = 0;
 652
 653         UNUSED(is_batchfile);
 654
 655         lookup = make_empty_lookup();
 656
 657         lookup->servfail_stops = ISC_FALSE;
 658         lookup->comments = ISC_FALSE;
 659
 660         while ((c = isc_commandline_parse(argc, argv, optstring)) != -1) {
 661                 switch (c) {
 662                 case 'l':
 663                         lookup->tcp_mode = ISC_TRUE;
 664                         lookup->rdtype = dns_rdatatype_axfr;
 665                         lookup->rdtypeset = ISC_TRUE;
 666                         fatalexit = 3;
 667                         break;
 668                 case 'v':
 669                 case 'd':
 670                         short_form = ISC_FALSE;
 671                         break;
 672                 case 'r':
 673                         lookup->recurse = ISC_FALSE;
 674                         break;
 675                 case 't':
 676                         if (strncasecmp(isc_commandline_argument,
 677                                         "ixfr=", 5) == 0) {
 678                                 rdtype = dns_rdatatype_ixfr;
 679                                 /* XXXMPA add error checking */
 680                                 serial = strtoul(isc_commandline_argument + 5,
 681                                                  NULL, 10);
 682                                 result = ISC_R_SUCCESS;
 683                         } else {
 684                                 tr.base = isc_commandline_argument;
 685                                 tr.length = strlen(isc_commandline_argument);
 686                                 result = dns_rdatatype_fromtext(&rdtype,
 687                                                    (isc_textregion_t *)&tr);
 688                         }
 689
 690                         if (result != ISC_R_SUCCESS) {
 691                                 fatalexit = 2;
 692                                 fatal("invalid type: %s\n",
 693                                       isc_commandline_argument);
 694                         }
 695                         if (!lookup->rdtypeset ||
 696                             lookup->rdtype != dns_rdatatype_axfr)
 697                                 lookup->rdtype = rdtype;
 698                         lookup->rdtypeset = ISC_TRUE;
 699 #ifdef WITH_IDN
 700                         idnoptions = 0;
 701 #endif
 702                         if (rdtype == dns_rdatatype_axfr) {
 703                                 /* -l -t any -v */
 704                                 list_type = dns_rdatatype_any;
 705                                 short_form = ISC_FALSE;
 706                                 lookup->tcp_mode = ISC_TRUE;
 707                         } else if (rdtype == dns_rdatatype_ixfr) {
 708                                 lookup->ixfr_serial = serial;
 709                                 lookup->tcp_mode = ISC_TRUE;
 710                                 list_type = rdtype;
 711 #ifdef WITH_IDN
 712                         } else if (rdtype == dns_rdatatype_a ||
 713                                    rdtype == dns_rdatatype_aaaa ||
 714                                    rdtype == dns_rdatatype_mx) {
 715                                 idnoptions = IDN_ASCCHECK;
 716                                 list_type = rdtype;
 717 #endif
 718                         } else
 719                                 list_type = rdtype;
 720                         list_addresses = ISC_FALSE;
 721                         default_lookups = ISC_FALSE;
 722                         break;
 723                 case 'c':
 724                         tr.base = isc_commandline_argument;
 725                         tr.length = strlen(isc_commandline_argument);
 726                         result = dns_rdataclass_fromtext(&rdclass,
 727                                                    (isc_textregion_t *)&tr);
 728
 729                         if (result != ISC_R_SUCCESS) {
 730                                 fatalexit = 2;
 731                                 fatal("invalid class: %s\n",
 732                                       isc_commandline_argument);
 733                         } else {
 734                                 lookup->rdclass = rdclass;
 735                                 lookup->rdclassset = ISC_TRUE;
 736                         }
 737                         default_lookups = ISC_FALSE;
 738                         break;
 739                 case 'a':
 740                         if (!lookup->rdtypeset ||
 741                             lookup->rdtype != dns_rdatatype_axfr)
 742                                 lookup->rdtype = dns_rdatatype_any;
 743                         list_type = dns_rdatatype_any;
 744                         list_addresses = ISC_FALSE;
 745                         lookup->rdtypeset = ISC_TRUE;
 746                         short_form = ISC_FALSE;
 747                         default_lookups = ISC_FALSE;
 748                         break;
 749                 case 'i':
 750                         lookup->ip6_int = ISC_TRUE;
 751                         break;
 752                 case 'n':
 753                         /* deprecated */
 754                         break;
 755                 case 'm':
 756                         /* Handled by pre_parse_args(). */
 757                         break;
 758                 case 'w':
 759                         /*
 760                          * The timer routines are coded such that
 761                          * timeout==MAXINT doesn't enable the timer
 762                          */
 763                         timeout = INT_MAX;
 764                         break;
 765                 case 'W':
 766                         timeout = atoi(isc_commandline_argument);
 767                         if (timeout < 1)
 768                                 timeout = 1;
 769                         break;
 770                 case 'R':
 771                         tries = atoi(isc_commandline_argument) + 1;
 772                         if (tries < 2)
 773                                 tries = 2;
 774                         break;
 775                 case 'T':
 776                         lookup->tcp_mode = ISC_TRUE;
 777                         break;
 778                 case 'C':
 779                         debug("showing all SOAs");
 780                         lookup->rdtype = dns_rdatatype_ns;
 781                         lookup->rdtypeset = ISC_TRUE;
 782                         lookup->rdclass = dns_rdataclass_in;
 783                         lookup->rdclassset = ISC_TRUE;
 784                         lookup->ns_search_only = ISC_TRUE;
 785                         lookup->trace_root = ISC_TRUE;
 786                         lookup->identify_previous_line = ISC_TRUE;
 787                         default_lookups = ISC_FALSE;
 788                         break;
 789                 case 'N':
 790                         debug("setting NDOTS to %s",
 791                               isc_commandline_argument);
 792                         ndots = atoi(isc_commandline_argument);
 793                         break;
 794                 case 'D':
 795                         debugging = ISC_TRUE;
 796                         break;
 797                 case '4':
 798                         if (have_ipv4) {
 799                                 isc_net_disableipv6();
 800                                 have_ipv6 = ISC_FALSE;
 801                         } else
 802                                 fatal("can't find IPv4 networking");
 803                         break;
 804                 case '6':
 805                         if (have_ipv6) {
 806                                 isc_net_disableipv4();
 807                                 have_ipv4 = ISC_FALSE;
 808                         } else
 809                                 fatal("can't find IPv6 networking");
 810                         break;
 811                 case 's':
 812                         lookup->servfail_stops = ISC_TRUE;
 813                         break;
 814                 }
 815         }
 816
 817         lookup->retries = tries;
 818
 819         if (isc_commandline_index >= argc)
 820                 show_usage();
 821
 822         strncpy(hostname, argv[isc_commandline_index], sizeof(hostname));
 823         hostname[sizeof(hostname)-1]=0;
 824         if (argc > isc_commandline_index + 1) {
 825                 set_nameserver(argv[isc_commandline_index+1]);
 826                 debug("server is %s", argv[isc_commandline_index+1]);
 827                 listed_server = ISC_TRUE;
 828         } else
 829                 check_ra = ISC_TRUE;
 830
 831         lookup->pending = ISC_FALSE;
 832         if (get_reverse(store, sizeof(store), hostname,
 833                         lookup->ip6_int, ISC_TRUE) == ISC_R_SUCCESS) {
 834                 strncpy(lookup->textname, store, sizeof(lookup->textname));
 835                 lookup->textname[sizeof(lookup->textname)-1] = 0;
 836                 lookup->rdtype = dns_rdatatype_ptr;
 837                 lookup->rdtypeset = ISC_TRUE;
 838                 default_lookups = ISC_FALSE;
 839         } else {
 840                 strncpy(lookup->textname, hostname, sizeof(lookup->textname));
 841                 lookup->textname[sizeof(lookup->textname)-1]=0;
 842                 usesearch = ISC_TRUE;
 843         }
 844         lookup->new_search = ISC_TRUE;
 845         ISC_LIST_APPEND(lookup_list, lookup, link);
 846 }
 847
 848 int
 849 main(int argc, char **argv) {
 850         isc_result_t result;
 851
 852         tries = 2;
 853
 854         ISC_LIST_INIT(lookup_list);
 855         ISC_LIST_INIT(server_list);
 856         ISC_LIST_INIT(search_list);
 857
 858         fatalexit = 1;
 859 #ifdef WITH_IDN
 860         idnoptions = IDN_ASCCHECK;
 861 #endif
 862
 863         debug("main()");
 864         progname = argv[0];
 865         pre_parse_args(argc, argv);
 866         result = isc_app_start();
 867         check_result(result, "isc_app_start");
 868         setup_libs();
 869         parse_args(ISC_FALSE, argc, argv);
 870         setup_system();
 871         result = isc_app_onrun(mctx, global_task, onrun_callback, NULL);
 872         check_result(result, "isc_app_onrun");
 873         isc_app_run();
 874         cancel_all();
 875         destroy_libs();
 876         isc_app_finish();
 877         return ((seen_error == 0) ? 0 : 1);
 878 }