contrib/bind9/bin/dig/host.c

   1 /*
   2  * Copyright (C) 2004-2007, 2009-2011  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 1.124.40.3 2011/03/11 06:46:59 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 ISC_PLATFORM_NORETURN_PRE static void
 145 show_usage(void) ISC_PLATFORM_NORETURN_POST;
 146
 147 static void
 148 show_usage(void) {
 149         fputs(
 150 "Usage: host [-aCdlriTwv] [-c class] [-N ndots] [-t type] [-W time]\n"
 151 "            [-R number] [-m flag] hostname [server]\n"
 152 "       -a is equivalent to -v -t ANY\n"
 153 "       -c specifies query class for non-IN data\n"
 154 "       -C compares SOA records on authoritative nameservers\n"
 155 "       -d is equivalent to -v\n"
 156 "       -l lists all hosts in a domain, using AXFR\n"
 157 "       -i IP6.INT reverse lookups\n"
 158 "       -N changes the number of dots allowed before root lookup is done\n"
 159 "       -r disables recursive processing\n"
 160 "       -R specifies number of retries for UDP packets\n"
 161 "       -s a SERVFAIL response should stop query\n"
 162 "       -t specifies the query type\n"
 163 "       -T enables TCP/IP mode\n"
 164 "       -v enables verbose output\n"
 165 "       -w specifies to wait forever for a reply\n"
 166 "       -W specifies how long to wait for a reply\n"
 167 "       -4 use IPv4 query transport only\n"
 168 "       -6 use IPv6 query transport only\n"
 169 "       -m set memory debugging flag (trace|record|usage)\n", stderr);
 170         exit(1);
 171 }
 172
 173 void
 174 dighost_shutdown(void) {
 175         isc_app_shutdown();
 176 }
 177
 178 void
 179 received(int bytes, isc_sockaddr_t *from, dig_query_t *query) {
 180         isc_time_t now;
 181         int diff;
 182
 183         if (!short_form) {
 184                 char fromtext[ISC_SOCKADDR_FORMATSIZE];
 185                 isc_sockaddr_format(from, fromtext, sizeof(fromtext));
 186                 TIME_NOW(&now);
 187                 diff = (int) isc_time_microdiff(&now, &query->time_sent);
 188                 printf("Received %u bytes from %s in %d ms\n",
 189                        bytes, fromtext, diff/1000);
 190         }
 191 }
 192
 193 void
 194 trying(char *frm, dig_lookup_t *lookup) {
 195         UNUSED(lookup);
 196
 197         if (!short_form)
 198                 printf("Trying \"%s\"\n", frm);
 199 }
 200
 201 static void
 202 say_message(dns_name_t *name, const char *msg, dns_rdata_t *rdata,
 203             dig_query_t *query)
 204 {
 205         isc_buffer_t *b = NULL;
 206         char namestr[DNS_NAME_FORMATSIZE];
 207         isc_region_t r;
 208         isc_result_t result;
 209         unsigned int bufsize = BUFSIZ;
 210
 211         dns_name_format(name, namestr, sizeof(namestr));
 212  retry:
 213         result = isc_buffer_allocate(mctx, &b, bufsize);
 214         check_result(result, "isc_buffer_allocate");
 215         result = dns_rdata_totext(rdata, NULL, b);
 216         if (result == ISC_R_NOSPACE) {
 217                 isc_buffer_free(&b);
 218                 bufsize *= 2;
 219                 goto retry;
 220         }
 221         check_result(result, "dns_rdata_totext");
 222         isc_buffer_usedregion(b, &r);
 223         if (query->lookup->identify_previous_line) {
 224                 printf("Nameserver %s:\n\t",
 225                         query->servname);
 226         }
 227         printf("%s %s %.*s", namestr,
 228                msg, (int)r.length, (char *)r.base);
 229         if (query->lookup->identify) {
 230                 printf(" on server %s", query->servname);
 231         }
 232         printf("\n");
 233         isc_buffer_free(&b);
 234 }
 235 #ifdef DIG_SIGCHASE
 236 /* Just for compatibility : not use in host program */
 237 isc_result_t
 238 printrdataset(dns_name_t *owner_name, dns_rdataset_t *rdataset,
 239               isc_buffer_t *target)
 240 {
 241   UNUSED(owner_name);
 242   UNUSED(rdataset);
 243   UNUSED(target);
 244   return(ISC_FALSE);
 245 }
 246 #endif
 247 static isc_result_t
 248 printsection(dns_message_t *msg, dns_section_t sectionid,
 249              const char *section_name, isc_boolean_t headers,
 250              dig_query_t *query)
 251 {
 252         dns_name_t *name, *print_name;
 253         dns_rdataset_t *rdataset;
 254         dns_rdata_t rdata = DNS_RDATA_INIT;
 255         isc_buffer_t target;
 256         isc_result_t result, loopresult;
 257         isc_region_t r;
 258         dns_name_t empty_name;
 259         char t[4096];
 260         isc_boolean_t first;
 261         isc_boolean_t no_rdata;
 262
 263         if (sectionid == DNS_SECTION_QUESTION)
 264                 no_rdata = ISC_TRUE;
 265         else
 266                 no_rdata = ISC_FALSE;
 267
 268         if (headers)
 269                 printf(";; %s SECTION:\n", section_name);
 270
 271         dns_name_init(&empty_name, NULL);
 272
 273         result = dns_message_firstname(msg, sectionid);
 274         if (result == ISC_R_NOMORE)
 275                 return (ISC_R_SUCCESS);
 276         else if (result != ISC_R_SUCCESS)
 277                 return (result);
 278
 279         for (;;) {
 280                 name = NULL;
 281                 dns_message_currentname(msg, sectionid, &name);
 282
 283                 isc_buffer_init(&target, t, sizeof(t));
 284                 first = ISC_TRUE;
 285                 print_name = name;
 286
 287                 for (rdataset = ISC_LIST_HEAD(name->list);
 288                      rdataset != NULL;
 289                      rdataset = ISC_LIST_NEXT(rdataset, link)) {
 290                         if (query->lookup->rdtype == dns_rdatatype_axfr &&
 291                             !((!list_addresses &&
 292                                (list_type == dns_rdatatype_any ||
 293                                 rdataset->type == list_type)) ||
 294                               (list_addresses &&
 295                                (rdataset->type == dns_rdatatype_a ||
 296                                 rdataset->type == dns_rdatatype_aaaa ||
 297                                 rdataset->type == dns_rdatatype_ns ||
 298                                 rdataset->type == dns_rdatatype_ptr))))
 299                                 continue;
 300                         if (!short_form) {
 301                                 result = dns_rdataset_totext(rdataset,
 302                                                              print_name,
 303                                                              ISC_FALSE,
 304                                                              no_rdata,
 305                                                              &target);
 306                                 if (result != ISC_R_SUCCESS)
 307                                         return (result);
 308 #ifdef USEINITALWS
 309                                 if (first) {
 310                                         print_name = &empty_name;
 311                                         first = ISC_FALSE;
 312                                 }
 313 #else
 314                                 UNUSED(first); /* Shut up compiler. */
 315 #endif
 316                         } else {
 317                                 loopresult = dns_rdataset_first(rdataset);
 318                                 while (loopresult == ISC_R_SUCCESS) {
 319                                         struct rtype *t;
 320                                         const char *rtt;
 321                                         char typebuf[DNS_RDATATYPE_FORMATSIZE];
 322                                         char typebuf2[DNS_RDATATYPE_FORMATSIZE
 323                                                      + 20];
 324                                         dns_rdataset_current(rdataset, &rdata);
 325
 326                                         for (t = rtypes; t->text != NULL; t++) {
 327                                                 if (t->type == rdata.type) {
 328                                                         rtt = t->text;
 329                                                         goto found;
 330                                                 }
 331                                         }
 332
 333                                         dns_rdatatype_format(rdata.type,
 334                                                              typebuf,
 335                                                              sizeof(typebuf));
 336                                         snprintf(typebuf2, sizeof(typebuf2),
 337                                                  "has %s record", typebuf);
 338                                         rtt = typebuf2;
 339                                 found:
 340                                         say_message(print_name, rtt,
 341                                                     &rdata, query);
 342                                         dns_rdata_reset(&rdata);
 343                                         loopresult =
 344                                                 dns_rdataset_next(rdataset);
 345                                 }
 346                         }
 347                 }
 348                 if (!short_form) {
 349                         isc_buffer_usedregion(&target, &r);
 350                         if (no_rdata)
 351                                 printf(";%.*s", (int)r.length,
 352                                        (char *)r.base);
 353                         else
 354                                 printf("%.*s", (int)r.length, (char *)r.base);
 355                 }
 356
 357                 result = dns_message_nextname(msg, sectionid);
 358                 if (result == ISC_R_NOMORE)
 359                         break;
 360                 else if (result != ISC_R_SUCCESS)
 361                         return (result);
 362         }
 363
 364         return (ISC_R_SUCCESS);
 365 }
 366
 367 static isc_result_t
 368 printrdata(dns_message_t *msg, dns_rdataset_t *rdataset, dns_name_t *owner,
 369            const char *set_name, isc_boolean_t headers)
 370 {
 371         isc_buffer_t target;
 372         isc_result_t result;
 373         isc_region_t r;
 374         char t[4096];
 375
 376         UNUSED(msg);
 377         if (headers)
 378                 printf(";; %s SECTION:\n", set_name);
 379
 380         isc_buffer_init(&target, t, sizeof(t));
 381
 382         result = dns_rdataset_totext(rdataset, owner, ISC_FALSE, ISC_FALSE,
 383                                      &target);
 384         if (result != ISC_R_SUCCESS)
 385                 return (result);
 386         isc_buffer_usedregion(&target, &r);
 387         printf("%.*s", (int)r.length, (char *)r.base);
 388
 389         return (ISC_R_SUCCESS);
 390 }
 391
 392 static void
 393 chase_cnamechain(dns_message_t *msg, dns_name_t *qname) {
 394         isc_result_t result;
 395         dns_rdataset_t *rdataset;
 396         dns_rdata_cname_t cname;
 397         dns_rdata_t rdata = DNS_RDATA_INIT;
 398         unsigned int i = msg->counts[DNS_SECTION_ANSWER];
 399
 400         while (i-- > 0) {
 401                 rdataset = NULL;
 402                 result = dns_message_findname(msg, DNS_SECTION_ANSWER, qname,
 403                                               dns_rdatatype_cname, 0, NULL,
 404                                               &rdataset);
 405                 if (result != ISC_R_SUCCESS)
 406                         return;
 407                 result = dns_rdataset_first(rdataset);
 408                 check_result(result, "dns_rdataset_first");
 409                 dns_rdata_reset(&rdata);
 410                 dns_rdataset_current(rdataset, &rdata);
 411                 result = dns_rdata_tostruct(&rdata, &cname, NULL);
 412                 check_result(result, "dns_rdata_tostruct");
 413                 dns_name_copy(&cname.cname, qname, NULL);
 414                 dns_rdata_freestruct(&cname);
 415         }
 416 }
 417
 418 isc_result_t
 419 printmessage(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers) {
 420         isc_boolean_t did_flag = ISC_FALSE;
 421         dns_rdataset_t *opt, *tsig = NULL;
 422         dns_name_t *tsigname;
 423         isc_result_t result = ISC_R_SUCCESS;
 424         int force_error;
 425
 426         UNUSED(headers);
 427
 428         /*
 429          * We get called multiple times.
 430          * Preserve any existing error status.
 431          */
 432         force_error = (seen_error == 1) ? 1 : 0;
 433         seen_error = 1;
 434         if (listed_server && !printed_server) {
 435                 char sockstr[ISC_SOCKADDR_FORMATSIZE];
 436
 437                 printf("Using domain server:\n");
 438                 printf("Name: %s\n", query->userarg);
 439                 isc_sockaddr_format(&query->sockaddr, sockstr,
 440                                     sizeof(sockstr));
 441                 printf("Address: %s\n", sockstr);
 442                 printf("Aliases: \n\n");
 443                 printed_server = ISC_TRUE;
 444         }
 445
 446         if (msg->rcode != 0) {
 447                 char namestr[DNS_NAME_FORMATSIZE];
 448                 dns_name_format(query->lookup->name, namestr, sizeof(namestr));
 449                 printf("Host %s not found: %d(%s)\n",
 450                        (msg->rcode != dns_rcode_nxdomain) ? namestr :
 451                        query->lookup->textname, msg->rcode,
 452                        rcode_totext(msg->rcode));
 453                 return (ISC_R_SUCCESS);
 454         }
 455
 456         if (default_lookups && query->lookup->rdtype == dns_rdatatype_a) {
 457                 char namestr[DNS_NAME_FORMATSIZE];
 458                 dig_lookup_t *lookup;
 459                 dns_fixedname_t fixed;
 460                 dns_name_t *name;
 461
 462                 /* Add AAAA and MX lookups. */
 463                 dns_fixedname_init(&fixed);
 464                 name = dns_fixedname_name(&fixed);
 465                 dns_name_copy(query->lookup->name, name, NULL);
 466                 chase_cnamechain(msg, name);
 467                 dns_name_format(name, namestr, sizeof(namestr));
 468                 lookup = clone_lookup(query->lookup, ISC_FALSE);
 469                 if (lookup != NULL) {
 470                         strncpy(lookup->textname, namestr,
 471                                 sizeof(lookup->textname));
 472                         lookup->textname[sizeof(lookup->textname)-1] = 0;
 473                         lookup->rdtype = dns_rdatatype_aaaa;
 474                         lookup->rdtypeset = ISC_TRUE;
 475                         lookup->origin = NULL;
 476                         lookup->retries = tries;
 477                         ISC_LIST_APPEND(lookup_list, lookup, link);
 478                 }
 479                 lookup = clone_lookup(query->lookup, ISC_FALSE);
 480                 if (lookup != NULL) {
 481                         strncpy(lookup->textname, namestr,
 482                                 sizeof(lookup->textname));
 483                         lookup->textname[sizeof(lookup->textname)-1] = 0;
 484                         lookup->rdtype = dns_rdatatype_mx;
 485                         lookup->rdtypeset = ISC_TRUE;
 486                         lookup->origin = NULL;
 487                         lookup->retries = tries;
 488                         ISC_LIST_APPEND(lookup_list, lookup, link);
 489                 }
 490         }
 491
 492         if (!short_form) {
 493                 printf(";; ->>HEADER<<- opcode: %s, status: %s, id: %u\n",
 494                        opcodetext[msg->opcode], rcode_totext(msg->rcode),
 495                        msg->id);
 496                 printf(";; flags: ");
 497                 if ((msg->flags & DNS_MESSAGEFLAG_QR) != 0) {
 498                         printf("qr");
 499                         did_flag = ISC_TRUE;
 500                 }
 501                 if ((msg->flags & DNS_MESSAGEFLAG_AA) != 0) {
 502                         printf("%saa", did_flag ? " " : "");
 503                         did_flag = ISC_TRUE;
 504                 }
 505                 if ((msg->flags & DNS_MESSAGEFLAG_TC) != 0) {
 506                         printf("%stc", did_flag ? " " : "");
 507                         did_flag = ISC_TRUE;
 508                 }
 509                 if ((msg->flags & DNS_MESSAGEFLAG_RD) != 0) {
 510                         printf("%srd", did_flag ? " " : "");
 511                         did_flag = ISC_TRUE;
 512                 }
 513                 if ((msg->flags & DNS_MESSAGEFLAG_RA) != 0) {
 514                         printf("%sra", did_flag ? " " : "");
 515                         did_flag = ISC_TRUE;
 516                 }
 517                 if ((msg->flags & DNS_MESSAGEFLAG_AD) != 0) {
 518                         printf("%sad", did_flag ? " " : "");
 519                         did_flag = ISC_TRUE;
 520                 }
 521                 if ((msg->flags & DNS_MESSAGEFLAG_CD) != 0) {
 522                         printf("%scd", did_flag ? " " : "");
 523                         did_flag = ISC_TRUE;
 524                         POST(did_flag);
 525                 }
 526                 printf("; QUERY: %u, ANSWER: %u, "
 527                        "AUTHORITY: %u, ADDITIONAL: %u\n",
 528                        msg->counts[DNS_SECTION_QUESTION],
 529                        msg->counts[DNS_SECTION_ANSWER],
 530                        msg->counts[DNS_SECTION_AUTHORITY],
 531                        msg->counts[DNS_SECTION_ADDITIONAL]);
 532                 opt = dns_message_getopt(msg);
 533                 if (opt != NULL)
 534                         printf(";; EDNS: version: %u, udp=%u\n",
 535                                (unsigned int)((opt->ttl & 0x00ff0000) >> 16),
 536                                (unsigned int)opt->rdclass);
 537                 tsigname = NULL;
 538                 tsig = dns_message_gettsig(msg, &tsigname);
 539                 if (tsig != NULL)
 540                         printf(";; PSEUDOSECTIONS: TSIG\n");
 541         }
 542         if (! ISC_LIST_EMPTY(msg->sections[DNS_SECTION_QUESTION]) &&
 543             !short_form) {
 544                 printf("\n");
 545                 result = printsection(msg, DNS_SECTION_QUESTION, "QUESTION",
 546                                       ISC_TRUE, query);
 547                 if (result != ISC_R_SUCCESS)
 548                         return (result);
 549         }
 550         if (! ISC_LIST_EMPTY(msg->sections[DNS_SECTION_ANSWER])) {
 551                 if (!short_form)
 552                         printf("\n");
 553                 result = printsection(msg, DNS_SECTION_ANSWER, "ANSWER",
 554                                       ISC_TF(!short_form), query);
 555                 if (result != ISC_R_SUCCESS)
 556                         return (result);
 557         }
 558
 559         if (! ISC_LIST_EMPTY(msg->sections[DNS_SECTION_AUTHORITY]) &&
 560             !short_form) {
 561                 printf("\n");
 562                 result = printsection(msg, DNS_SECTION_AUTHORITY, "AUTHORITY",
 563                                       ISC_TRUE, query);
 564                 if (result != ISC_R_SUCCESS)
 565                         return (result);
 566         }
 567         if (! ISC_LIST_EMPTY(msg->sections[DNS_SECTION_ADDITIONAL]) &&
 568             !short_form) {
 569                 printf("\n");
 570                 result = printsection(msg, DNS_SECTION_ADDITIONAL,
 571                                       "ADDITIONAL", ISC_TRUE, query);
 572                 if (result != ISC_R_SUCCESS)
 573                         return (result);
 574         }
 575         if ((tsig != NULL) && !short_form) {
 576                 printf("\n");
 577                 result = printrdata(msg, tsig, tsigname,
 578                                     "PSEUDOSECTION TSIG", ISC_TRUE);
 579                 if (result != ISC_R_SUCCESS)
 580                         return (result);
 581         }
 582         if (!short_form)
 583                 printf("\n");
 584
 585         if (short_form && !default_lookups &&
 586             ISC_LIST_EMPTY(msg->sections[DNS_SECTION_ANSWER])) {
 587                 char namestr[DNS_NAME_FORMATSIZE];
 588                 char typestr[DNS_RDATATYPE_FORMATSIZE];
 589                 dns_name_format(query->lookup->name, namestr, sizeof(namestr));
 590                 dns_rdatatype_format(query->lookup->rdtype, typestr,
 591                                      sizeof(typestr));
 592                 printf("%s has no %s record\n", namestr, typestr);
 593         }
 594         seen_error = force_error;
 595         return (result);
 596 }
 597
 598 static const char * optstring = "46ac:dilnm:rst:vwCDN:R:TW:";
 599
 600 static void
 601 pre_parse_args(int argc, char **argv) {
 602         int c;
 603
 604         while ((c = isc_commandline_parse(argc, argv, optstring)) != -1) {
 605                 switch (c) {
 606                 case 'm':
 607                         memdebugging = ISC_TRUE;
 608                         if (strcasecmp("trace", isc_commandline_argument) == 0)
 609                                 isc_mem_debugging |= ISC_MEM_DEBUGTRACE;
 610                         else if (!strcasecmp("record",
 611                                              isc_commandline_argument) == 0)
 612                                 isc_mem_debugging |= ISC_MEM_DEBUGRECORD;
 613                         else if (strcasecmp("usage",
 614                                             isc_commandline_argument) == 0)
 615                                 isc_mem_debugging |= ISC_MEM_DEBUGUSAGE;
 616                         break;
 617
 618                 case '4': break;
 619                 case '6': break;
 620                 case 'a': break;
 621                 case 'c': break;
 622                 case 'd': break;
 623                 case 'i': break;
 624                 case 'l': break;
 625                 case 'n': break;
 626                 case 'r': break;
 627                 case 's': break;
 628                 case 't': break;
 629                 case 'v': break;
 630                 case 'w': break;
 631                 case 'C': break;
 632                 case 'D':
 633                         debugging = ISC_TRUE;
 634                         break;
 635                 case 'N': break;
 636                 case 'R': break;
 637                 case 'T': break;
 638                 case 'W': break;
 639                 default:
 640                         show_usage();
 641                 }
 642         }
 643         isc_commandline_reset = ISC_TRUE;
 644         isc_commandline_index = 1;
 645 }
 646
 647 static void
 648 parse_args(isc_boolean_t is_batchfile, int argc, char **argv) {
 649         char hostname[MXNAME];
 650         dig_lookup_t *lookup;
 651         int c;
 652         char store[MXNAME];
 653         isc_textregion_t tr;
 654         isc_result_t result = ISC_R_SUCCESS;
 655         dns_rdatatype_t rdtype;
 656         dns_rdataclass_t rdclass;
 657         isc_uint32_t serial = 0;
 658
 659         UNUSED(is_batchfile);
 660
 661         lookup = make_empty_lookup();
 662
 663         lookup->servfail_stops = ISC_FALSE;
 664         lookup->comments = ISC_FALSE;
 665
 666         while ((c = isc_commandline_parse(argc, argv, optstring)) != -1) {
 667                 switch (c) {
 668                 case 'l':
 669                         lookup->tcp_mode = ISC_TRUE;
 670                         lookup->rdtype = dns_rdatatype_axfr;
 671                         lookup->rdtypeset = ISC_TRUE;
 672                         fatalexit = 3;
 673                         break;
 674                 case 'v':
 675                 case 'd':
 676                         short_form = ISC_FALSE;
 677                         break;
 678                 case 'r':
 679                         lookup->recurse = ISC_FALSE;
 680                         break;
 681                 case 't':
 682                         if (strncasecmp(isc_commandline_argument,
 683                                         "ixfr=", 5) == 0) {
 684                                 rdtype = dns_rdatatype_ixfr;
 685                                 /* XXXMPA add error checking */
 686                                 serial = strtoul(isc_commandline_argument + 5,
 687                                                  NULL, 10);
 688                                 result = ISC_R_SUCCESS;
 689                         } else {
 690                                 tr.base = isc_commandline_argument;
 691                                 tr.length = strlen(isc_commandline_argument);
 692                                 result = dns_rdatatype_fromtext(&rdtype,
 693                                                    (isc_textregion_t *)&tr);
 694                         }
 695
 696                         if (result != ISC_R_SUCCESS) {
 697                                 fatalexit = 2;
 698                                 fatal("invalid type: %s\n",
 699                                       isc_commandline_argument);
 700                         }
 701                         if (!lookup->rdtypeset ||
 702                             lookup->rdtype != dns_rdatatype_axfr)
 703                                 lookup->rdtype = rdtype;
 704                         lookup->rdtypeset = ISC_TRUE;
 705 #ifdef WITH_IDN
 706                         idnoptions = 0;
 707 #endif
 708                         if (rdtype == dns_rdatatype_axfr) {
 709                                 /* -l -t any -v */
 710                                 list_type = dns_rdatatype_any;
 711                                 short_form = ISC_FALSE;
 712                                 lookup->tcp_mode = ISC_TRUE;
 713                         } else if (rdtype == dns_rdatatype_ixfr) {
 714                                 lookup->ixfr_serial = serial;
 715                                 lookup->tcp_mode = ISC_TRUE;
 716                                 list_type = rdtype;
 717 #ifdef WITH_IDN
 718                         } else if (rdtype == dns_rdatatype_a ||
 719                                    rdtype == dns_rdatatype_aaaa ||
 720                                    rdtype == dns_rdatatype_mx) {
 721                                 idnoptions = IDN_ASCCHECK;
 722                                 list_type = rdtype;
 723 #endif
 724                         } else
 725                                 list_type = rdtype;
 726                         list_addresses = ISC_FALSE;
 727                         default_lookups = ISC_FALSE;
 728                         break;
 729                 case 'c':
 730                         tr.base = isc_commandline_argument;
 731                         tr.length = strlen(isc_commandline_argument);
 732                         result = dns_rdataclass_fromtext(&rdclass,
 733                                                    (isc_textregion_t *)&tr);
 734
 735                         if (result != ISC_R_SUCCESS) {
 736                                 fatalexit = 2;
 737                                 fatal("invalid class: %s\n",
 738                                       isc_commandline_argument);
 739                         } else {
 740                                 lookup->rdclass = rdclass;
 741                                 lookup->rdclassset = ISC_TRUE;
 742                         }
 743                         default_lookups = ISC_FALSE;
 744                         break;
 745                 case 'a':
 746                         if (!lookup->rdtypeset ||
 747                             lookup->rdtype != dns_rdatatype_axfr)
 748                                 lookup->rdtype = dns_rdatatype_any;
 749                         list_type = dns_rdatatype_any;
 750                         list_addresses = ISC_FALSE;
 751                         lookup->rdtypeset = ISC_TRUE;
 752                         short_form = ISC_FALSE;
 753                         default_lookups = ISC_FALSE;
 754                         break;
 755                 case 'i':
 756                         lookup->ip6_int = ISC_TRUE;
 757                         break;
 758                 case 'n':
 759                         /* deprecated */
 760                         break;
 761                 case 'm':
 762                         /* Handled by pre_parse_args(). */
 763                         break;
 764                 case 'w':
 765                         /*
 766                          * The timer routines are coded such that
 767                          * timeout==MAXINT doesn't enable the timer
 768                          */
 769                         timeout = INT_MAX;
 770                         break;
 771                 case 'W':
 772                         timeout = atoi(isc_commandline_argument);
 773                         if (timeout < 1)
 774                                 timeout = 1;
 775                         break;
 776                 case 'R':
 777                         tries = atoi(isc_commandline_argument) + 1;
 778                         if (tries < 2)
 779                                 tries = 2;
 780                         break;
 781                 case 'T':
 782                         lookup->tcp_mode = ISC_TRUE;
 783                         break;
 784                 case 'C':
 785                         debug("showing all SOAs");
 786                         lookup->rdtype = dns_rdatatype_ns;
 787                         lookup->rdtypeset = ISC_TRUE;
 788                         lookup->rdclass = dns_rdataclass_in;
 789                         lookup->rdclassset = ISC_TRUE;
 790                         lookup->ns_search_only = ISC_TRUE;
 791                         lookup->trace_root = ISC_TRUE;
 792                         lookup->identify_previous_line = ISC_TRUE;
 793                         default_lookups = ISC_FALSE;
 794                         break;
 795                 case 'N':
 796                         debug("setting NDOTS to %s",
 797                               isc_commandline_argument);
 798                         ndots = atoi(isc_commandline_argument);
 799                         break;
 800                 case 'D':
 801                         /* Handled by pre_parse_args(). */
 802                         break;
 803                 case '4':
 804                         if (have_ipv4) {
 805                                 isc_net_disableipv6();
 806                                 have_ipv6 = ISC_FALSE;
 807                         } else
 808                                 fatal("can't find IPv4 networking");
 809                         break;
 810                 case '6':
 811                         if (have_ipv6) {
 812                                 isc_net_disableipv4();
 813                                 have_ipv4 = ISC_FALSE;
 814                         } else
 815                                 fatal("can't find IPv6 networking");
 816                         break;
 817                 case 's':
 818                         lookup->servfail_stops = ISC_TRUE;
 819                         break;
 820                 }
 821         }
 822
 823         lookup->retries = tries;
 824
 825         if (isc_commandline_index >= argc)
 826                 show_usage();
 827
 828         strlcpy(hostname, argv[isc_commandline_index], sizeof(hostname));
 829
 830         if (argc > isc_commandline_index + 1) {
 831                 set_nameserver(argv[isc_commandline_index+1]);
 832                 debug("server is %s", argv[isc_commandline_index+1]);
 833                 listed_server = ISC_TRUE;
 834         } else
 835                 check_ra = ISC_TRUE;
 836
 837         lookup->pending = ISC_FALSE;
 838         if (get_reverse(store, sizeof(store), hostname,
 839                         lookup->ip6_int, ISC_TRUE) == ISC_R_SUCCESS) {
 840                 strncpy(lookup->textname, store, sizeof(lookup->textname));
 841                 lookup->textname[sizeof(lookup->textname)-1] = 0;
 842                 lookup->rdtype = dns_rdatatype_ptr;
 843                 lookup->rdtypeset = ISC_TRUE;
 844                 default_lookups = ISC_FALSE;
 845         } else {
 846                 strncpy(lookup->textname, hostname, sizeof(lookup->textname));
 847                 lookup->textname[sizeof(lookup->textname)-1]=0;
 848                 usesearch = ISC_TRUE;
 849         }
 850         lookup->new_search = ISC_TRUE;
 851         ISC_LIST_APPEND(lookup_list, lookup, link);
 852 }
 853
 854 int
 855 main(int argc, char **argv) {
 856         isc_result_t result;
 857
 858         tries = 2;
 859
 860         ISC_LIST_INIT(lookup_list);
 861         ISC_LIST_INIT(server_list);
 862         ISC_LIST_INIT(search_list);
 863
 864         fatalexit = 1;
 865 #ifdef WITH_IDN
 866         idnoptions = IDN_ASCCHECK;
 867 #endif
 868
 869         debug("main()");
 870         progname = argv[0];
 871         pre_parse_args(argc, argv);
 872         result = isc_app_start();
 873         check_result(result, "isc_app_start");
 874         setup_libs();
 875         parse_args(ISC_FALSE, argc, argv);
 876         setup_system();
 877         result = isc_app_onrun(mctx, global_task, onrun_callback, NULL);
 878         check_result(result, "isc_app_onrun");
 879         isc_app_run();
 880         cancel_all();
 881         destroy_libs();
 882         isc_app_finish();
 883         return ((seen_error == 0) ? 0 : 1);
 884 }