contrib/bind9/bin/dig/nslookup.c

   1 /*
   2  * Copyright (C) 2004-2015  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 #include <config.h>
  19
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22
  23 #include <isc/app.h>
  24 #include <isc/buffer.h>
  25 #include <isc/commandline.h>
  26 #include <isc/event.h>
  27 #include <isc/parseint.h>
  28 #include <isc/print.h>
  29 #include <isc/string.h>
  30 #include <isc/timer.h>
  31 #include <isc/util.h>
  32 #include <isc/task.h>
  33 #include <isc/netaddr.h>
  34
  35 #include <dns/message.h>
  36 #include <dns/name.h>
  37 #include <dns/fixedname.h>
  38 #include <dns/rdata.h>
  39 #include <dns/rdataclass.h>
  40 #include <dns/rdataset.h>
  41 #include <dns/rdatastruct.h>
  42 #include <dns/rdatatype.h>
  43 #include <dns/byaddr.h>
  44
  45 #include <dig/dig.h>
  46
  47 #if defined(HAVE_READLINE)
  48 #include <readline/readline.h>
  49 #include <readline/history.h>
  50 #endif
  51
  52 static isc_boolean_t short_form = ISC_TRUE,
  53         tcpmode = ISC_FALSE,
  54         identify = ISC_FALSE, stats = ISC_TRUE,
  55         comments = ISC_TRUE, section_question = ISC_TRUE,
  56         section_answer = ISC_TRUE, section_authority = ISC_TRUE,
  57         section_additional = ISC_TRUE, recurse = ISC_TRUE,
  58         aaonly = ISC_FALSE, nofail = ISC_TRUE;
  59
  60 static isc_boolean_t interactive;
  61
  62 static isc_boolean_t in_use = ISC_FALSE;
  63 static char defclass[MXRD] = "IN";
  64 static char deftype[MXRD] = "A";
  65 static isc_event_t *global_event = NULL;
  66 static int query_error = 1, print_error = 0;
  67
  68 static char domainopt[DNS_NAME_MAXTEXT];
  69
  70 static const char *rcodetext[] = {
  71         "NOERROR",
  72         "FORMERR",
  73         "SERVFAIL",
  74         "NXDOMAIN",
  75         "NOTIMP",
  76         "REFUSED",
  77         "YXDOMAIN",
  78         "YXRRSET",
  79         "NXRRSET",
  80         "NOTAUTH",
  81         "NOTZONE",
  82         "RESERVED11",
  83         "RESERVED12",
  84         "RESERVED13",
  85         "RESERVED14",
  86         "RESERVED15",
  87         "BADVERS"
  88 };
  89
  90 static const char *rtypetext[] = {
  91         "rtype_0 = ",                   /* 0 */
  92         "internet address = ",          /* 1 */
  93         "nameserver = ",                /* 2 */
  94         "md = ",                        /* 3 */
  95         "mf = ",                        /* 4 */
  96         "canonical name = ",            /* 5 */
  97         "soa = ",                       /* 6 */
  98         "mb = ",                        /* 7 */
  99         "mg = ",                        /* 8 */
 100         "mr = ",                        /* 9 */
 101         "rtype_10 = ",                  /* 10 */
 102         "protocol = ",                  /* 11 */
 103         "name = ",                      /* 12 */
 104         "hinfo = ",                     /* 13 */
 105         "minfo = ",                     /* 14 */
 106         "mail exchanger = ",            /* 15 */
 107         "text = ",                      /* 16 */
 108         "rp = ",                        /* 17 */
 109         "afsdb = ",                     /* 18 */
 110         "x25 address = ",               /* 19 */
 111         "isdn address = ",              /* 20 */
 112         "rt = ",                        /* 21 */
 113         "nsap = ",                      /* 22 */
 114         "nsap_ptr = ",                  /* 23 */
 115         "signature = ",                 /* 24 */
 116         "key = ",                       /* 25 */
 117         "px = ",                        /* 26 */
 118         "gpos = ",                      /* 27 */
 119         "has AAAA address ",            /* 28 */
 120         "loc = ",                       /* 29 */
 121         "next = ",                      /* 30 */
 122         "rtype_31 = ",                  /* 31 */
 123         "rtype_32 = ",                  /* 32 */
 124         "service = ",                   /* 33 */
 125         "rtype_34 = ",                  /* 34 */
 126         "naptr = ",                     /* 35 */
 127         "kx = ",                        /* 36 */
 128         "cert = ",                      /* 37 */
 129         "v6 address = ",                /* 38 */
 130         "dname = ",                     /* 39 */
 131         "rtype_40 = ",                  /* 40 */
 132         "optional = "                   /* 41 */
 133 };
 134
 135 #define N_KNOWN_RRTYPES (sizeof(rtypetext) / sizeof(rtypetext[0]))
 136
 137 static void flush_lookup_list(void);
 138 static void getinput(isc_task_t *task, isc_event_t *event);
 139
 140 static char *
 141 rcode_totext(dns_rcode_t rcode)
 142 {
 143         static char buf[sizeof("?65535")];
 144         union {
 145                 const char *consttext;
 146                 char *deconsttext;
 147         } totext;
 148
 149         if (rcode >= (sizeof(rcodetext)/sizeof(rcodetext[0]))) {
 150                 snprintf(buf, sizeof(buf), "?%u", rcode);
 151                 totext.deconsttext = buf;
 152         } else
 153                 totext.consttext = rcodetext[rcode];
 154         return totext.deconsttext;
 155 }
 156
 157 void
 158 dighost_shutdown(void) {
 159         isc_event_t *event = global_event;
 160
 161         flush_lookup_list();
 162         debug("dighost_shutdown()");
 163
 164         if (!in_use) {
 165                 isc_app_shutdown();
 166                 return;
 167         }
 168
 169         isc_task_send(global_task, &event);
 170 }
 171
 172 static void
 173 printsoa(dns_rdata_t *rdata) {
 174         dns_rdata_soa_t soa;
 175         isc_result_t result;
 176         char namebuf[DNS_NAME_FORMATSIZE];
 177
 178         result = dns_rdata_tostruct(rdata, &soa, NULL);
 179         check_result(result, "dns_rdata_tostruct");
 180
 181         dns_name_format(&soa.origin, namebuf, sizeof(namebuf));
 182         printf("\torigin = %s\n", namebuf);
 183         dns_name_format(&soa.contact, namebuf, sizeof(namebuf));
 184         printf("\tmail addr = %s\n", namebuf);
 185         printf("\tserial = %u\n", soa.serial);
 186         printf("\trefresh = %u\n", soa.refresh);
 187         printf("\tretry = %u\n", soa.retry);
 188         printf("\texpire = %u\n", soa.expire);
 189         printf("\tminimum = %u\n", soa.minimum);
 190         dns_rdata_freestruct(&soa);
 191 }
 192
 193 static void
 194 printa(dns_rdata_t *rdata) {
 195         isc_result_t result;
 196         char text[sizeof("255.255.255.255")];
 197         isc_buffer_t b;
 198
 199         isc_buffer_init(&b, text, sizeof(text));
 200         result = dns_rdata_totext(rdata, NULL, &b);
 201         check_result(result, "dns_rdata_totext");
 202         printf("Address: %.*s\n", (int)isc_buffer_usedlength(&b),
 203                (char *)isc_buffer_base(&b));
 204 }
 205 #ifdef DIG_SIGCHASE
 206 /* Just for compatibility : not use in host program */
 207 isc_result_t
 208 printrdataset(dns_name_t *owner_name, dns_rdataset_t *rdataset,
 209               isc_buffer_t *target)
 210 {
 211         UNUSED(owner_name);
 212         UNUSED(rdataset);
 213         UNUSED(target);
 214         return(ISC_FALSE);
 215 }
 216 #endif
 217 static void
 218 printrdata(dns_rdata_t *rdata) {
 219         isc_result_t result;
 220         isc_buffer_t *b = NULL;
 221         unsigned int size = 1024;
 222         isc_boolean_t done = ISC_FALSE;
 223
 224         if (rdata->type < N_KNOWN_RRTYPES)
 225                 printf("%s", rtypetext[rdata->type]);
 226         else
 227                 printf("rdata_%d = ", rdata->type);
 228
 229         while (!done) {
 230                 result = isc_buffer_allocate(mctx, &b, size);
 231                 if (result != ISC_R_SUCCESS)
 232                         check_result(result, "isc_buffer_allocate");
 233                 result = dns_rdata_totext(rdata, NULL, b);
 234                 if (result == ISC_R_SUCCESS) {
 235                         printf("%.*s\n", (int)isc_buffer_usedlength(b),
 236                                (char *)isc_buffer_base(b));
 237                         done = ISC_TRUE;
 238                 } else if (result != ISC_R_NOSPACE)
 239                         check_result(result, "dns_rdata_totext");
 240                 isc_buffer_free(&b);
 241                 size *= 2;
 242         }
 243 }
 244
 245 static isc_result_t
 246 printsection(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers,
 247              dns_section_t section) {
 248         isc_result_t result, loopresult;
 249         dns_name_t *name;
 250         dns_rdataset_t *rdataset = NULL;
 251         dns_rdata_t rdata = DNS_RDATA_INIT;
 252         char namebuf[DNS_NAME_FORMATSIZE];
 253
 254         UNUSED(query);
 255         UNUSED(headers);
 256
 257         debug("printsection()");
 258
 259         result = dns_message_firstname(msg, section);
 260         if (result == ISC_R_NOMORE)
 261                 return (ISC_R_SUCCESS);
 262         else if (result != ISC_R_SUCCESS)
 263                 return (result);
 264         for (;;) {
 265                 name = NULL;
 266                 dns_message_currentname(msg, section,
 267                                         &name);
 268                 for (rdataset = ISC_LIST_HEAD(name->list);
 269                      rdataset != NULL;
 270                      rdataset = ISC_LIST_NEXT(rdataset, link)) {
 271                         loopresult = dns_rdataset_first(rdataset);
 272                         while (loopresult == ISC_R_SUCCESS) {
 273                                 dns_rdataset_current(rdataset, &rdata);
 274                                 switch (rdata.type) {
 275                                 case dns_rdatatype_a:
 276                                         if (section != DNS_SECTION_ANSWER)
 277                                                 goto def_short_section;
 278                                         dns_name_format(name, namebuf,
 279                                                         sizeof(namebuf));
 280                                         printf("Name:\t%s\n", namebuf);
 281                                         printa(&rdata);
 282                                         break;
 283                                 case dns_rdatatype_soa:
 284                                         dns_name_format(name, namebuf,
 285                                                         sizeof(namebuf));
 286                                         printf("%s\n", namebuf);
 287                                         printsoa(&rdata);
 288                                         break;
 289                                 default:
 290                                 def_short_section:
 291                                         dns_name_format(name, namebuf,
 292                                                         sizeof(namebuf));
 293                                         printf("%s\t", namebuf);
 294                                         printrdata(&rdata);
 295                                         break;
 296                                 }
 297                                 dns_rdata_reset(&rdata);
 298                                 loopresult = dns_rdataset_next(rdataset);
 299                         }
 300                 }
 301                 result = dns_message_nextname(msg, section);
 302                 if (result == ISC_R_NOMORE)
 303                         break;
 304                 else if (result != ISC_R_SUCCESS) {
 305                         return (result);
 306                 }
 307         }
 308         return (ISC_R_SUCCESS);
 309 }
 310
 311 static isc_result_t
 312 detailsection(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers,
 313              dns_section_t section) {
 314         isc_result_t result, loopresult;
 315         dns_name_t *name;
 316         dns_rdataset_t *rdataset = NULL;
 317         dns_rdata_t rdata = DNS_RDATA_INIT;
 318         char namebuf[DNS_NAME_FORMATSIZE];
 319
 320         UNUSED(query);
 321
 322         debug("detailsection()");
 323
 324         if (headers) {
 325                 switch (section) {
 326                 case DNS_SECTION_QUESTION:
 327                         puts("    QUESTIONS:");
 328                         break;
 329                 case DNS_SECTION_ANSWER:
 330                         puts("    ANSWERS:");
 331                         break;
 332                 case DNS_SECTION_AUTHORITY:
 333                         puts("    AUTHORITY RECORDS:");
 334                         break;
 335                 case DNS_SECTION_ADDITIONAL:
 336                         puts("    ADDITIONAL RECORDS:");
 337                         break;
 338                 }
 339         }
 340
 341         result = dns_message_firstname(msg, section);
 342         if (result == ISC_R_NOMORE)
 343                 return (ISC_R_SUCCESS);
 344         else if (result != ISC_R_SUCCESS)
 345                 return (result);
 346         for (;;) {
 347                 name = NULL;
 348                 dns_message_currentname(msg, section,
 349                                         &name);
 350                 for (rdataset = ISC_LIST_HEAD(name->list);
 351                      rdataset != NULL;
 352                      rdataset = ISC_LIST_NEXT(rdataset, link)) {
 353                         if (section == DNS_SECTION_QUESTION) {
 354                                 dns_name_format(name, namebuf,
 355                                                 sizeof(namebuf));
 356                                 printf("\t%s, ", namebuf);
 357                                 dns_rdatatype_format(rdataset->type,
 358                                                      namebuf,
 359                                                      sizeof(namebuf));
 360                                 printf("type = %s, ", namebuf);
 361                                 dns_rdataclass_format(rdataset->rdclass,
 362                                                       namebuf,
 363                                                       sizeof(namebuf));
 364                                 printf("class = %s\n", namebuf);
 365                         }
 366                         loopresult = dns_rdataset_first(rdataset);
 367                         while (loopresult == ISC_R_SUCCESS) {
 368                                 dns_rdataset_current(rdataset, &rdata);
 369
 370                                 dns_name_format(name, namebuf,
 371                                                 sizeof(namebuf));
 372                                 printf("    ->  %s\n", namebuf);
 373
 374                                 switch (rdata.type) {
 375                                 case dns_rdatatype_soa:
 376                                         printsoa(&rdata);
 377                                         break;
 378                                 default:
 379                                         printf("\t");
 380                                         printrdata(&rdata);
 381                                 }
 382                                 dns_rdata_reset(&rdata);
 383                                 printf("\tttl = %u\n", rdataset->ttl);
 384                                 loopresult = dns_rdataset_next(rdataset);
 385                         }
 386                 }
 387                 result = dns_message_nextname(msg, section);
 388                 if (result == ISC_R_NOMORE)
 389                         break;
 390                 else if (result != ISC_R_SUCCESS) {
 391                         return (result);
 392                 }
 393         }
 394         return (ISC_R_SUCCESS);
 395 }
 396
 397 void
 398 received(int bytes, isc_sockaddr_t *from, dig_query_t *query)
 399 {
 400         UNUSED(bytes);
 401         UNUSED(from);
 402         UNUSED(query);
 403 }
 404
 405 void
 406 trying(char *frm, dig_lookup_t *lookup) {
 407         UNUSED(frm);
 408         UNUSED(lookup);
 409
 410 }
 411
 412 isc_result_t
 413 printmessage(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers) {
 414         char servtext[ISC_SOCKADDR_FORMATSIZE];
 415
 416         /* I've we've gotten this far, we've reached a server. */
 417         query_error = 0;
 418
 419         debug("printmessage()");
 420
 421         isc_sockaddr_format(&query->sockaddr, servtext, sizeof(servtext));
 422         printf("Server:\t\t%s\n", query->userarg);
 423         printf("Address:\t%s\n", servtext);
 424
 425         puts("");
 426
 427         if (!short_form) {
 428                 puts("------------");
 429                 /*              detailheader(query, msg);*/
 430                 detailsection(query, msg, ISC_TRUE, DNS_SECTION_QUESTION);
 431                 detailsection(query, msg, ISC_TRUE, DNS_SECTION_ANSWER);
 432                 detailsection(query, msg, ISC_TRUE, DNS_SECTION_AUTHORITY);
 433                 detailsection(query, msg, ISC_TRUE, DNS_SECTION_ADDITIONAL);
 434                 puts("------------");
 435         }
 436
 437         if (msg->rcode != 0) {
 438                 char nametext[DNS_NAME_FORMATSIZE];
 439                 dns_name_format(query->lookup->name,
 440                                 nametext, sizeof(nametext));
 441                 printf("** server can't find %s: %s\n",
 442                        nametext, rcode_totext(msg->rcode));
 443                 debug("returning with rcode == 0");
 444
 445                 /* the lookup failed */
 446                 print_error |= 1;
 447                 return (ISC_R_SUCCESS);
 448         }
 449
 450         if ((msg->flags & DNS_MESSAGEFLAG_AA) == 0)
 451                 puts("Non-authoritative answer:");
 452         if (!ISC_LIST_EMPTY(msg->sections[DNS_SECTION_ANSWER]))
 453                 printsection(query, msg, headers, DNS_SECTION_ANSWER);
 454         else
 455                 printf("*** Can't find %s: No answer\n",
 456                        query->lookup->textname);
 457
 458         if (((msg->flags & DNS_MESSAGEFLAG_AA) == 0) &&
 459             (query->lookup->rdtype != dns_rdatatype_a)) {
 460                 puts("\nAuthoritative answers can be found from:");
 461                 printsection(query, msg, headers,
 462                              DNS_SECTION_AUTHORITY);
 463                 printsection(query, msg, headers,
 464                              DNS_SECTION_ADDITIONAL);
 465         }
 466         return (ISC_R_SUCCESS);
 467 }
 468
 469 static void
 470 show_settings(isc_boolean_t full, isc_boolean_t serv_only) {
 471         dig_server_t *srv;
 472         isc_sockaddr_t sockaddr;
 473         dig_searchlist_t *listent;
 474         isc_result_t result;
 475
 476         srv = ISC_LIST_HEAD(server_list);
 477
 478         while (srv != NULL) {
 479                 char sockstr[ISC_SOCKADDR_FORMATSIZE];
 480
 481                 result = get_address(srv->servername, port, &sockaddr);
 482                 check_result(result, "get_address");
 483
 484                 isc_sockaddr_format(&sockaddr, sockstr, sizeof(sockstr));
 485                 printf("Default server: %s\nAddress: %s\n",
 486                         srv->userarg, sockstr);
 487                 if (!full)
 488                         return;
 489                 srv = ISC_LIST_NEXT(srv, link);
 490         }
 491         if (serv_only)
 492                 return;
 493         printf("\nSet options:\n");
 494         printf("  %s\t\t\t%s\t\t%s\n",
 495                tcpmode ? "vc" : "novc",
 496                short_form ? "nodebug" : "debug",
 497                debugging ? "d2" : "nod2");
 498         printf("  %s\t\t%s\n",
 499                usesearch ? "search" : "nosearch",
 500                recurse ? "recurse" : "norecurse");
 501         printf("  timeout = %d\t\tretry = %d\tport = %d\tndots = %d\n",
 502                timeout, tries, port, ndots);
 503         printf("  querytype = %-8s\tclass = %s\n", deftype, defclass);
 504         printf("  srchlist = ");
 505         for (listent = ISC_LIST_HEAD(search_list);
 506              listent != NULL;
 507              listent = ISC_LIST_NEXT(listent, link)) {
 508                      printf("%s", listent->origin);
 509                      if (ISC_LIST_NEXT(listent, link) != NULL)
 510                              printf("/");
 511         }
 512         printf("\n");
 513 }
 514
 515 static isc_boolean_t
 516 testtype(char *typetext) {
 517         isc_result_t result;
 518         isc_textregion_t tr;
 519         dns_rdatatype_t rdtype;
 520
 521         tr.base = typetext;
 522         tr.length = strlen(typetext);
 523         result = dns_rdatatype_fromtext(&rdtype, &tr);
 524         if (result == ISC_R_SUCCESS)
 525                 return (ISC_TRUE);
 526         else {
 527                 printf("unknown query type: %s\n", typetext);
 528                 return (ISC_FALSE);
 529         }
 530 }
 531
 532 static isc_boolean_t
 533 testclass(char *typetext) {
 534         isc_result_t result;
 535         isc_textregion_t tr;
 536         dns_rdataclass_t rdclass;
 537
 538         tr.base = typetext;
 539         tr.length = strlen(typetext);
 540         result = dns_rdataclass_fromtext(&rdclass, &tr);
 541         if (result == ISC_R_SUCCESS)
 542                 return (ISC_TRUE);
 543         else {
 544                 printf("unknown query class: %s\n", typetext);
 545                 return (ISC_FALSE);
 546         }
 547 }
 548
 549 static void
 550 set_port(const char *value) {
 551         isc_uint32_t n;
 552         isc_result_t result = parse_uint(&n, value, 65535, "port");
 553         if (result == ISC_R_SUCCESS)
 554                 port = (isc_uint16_t) n;
 555 }
 556
 557 static void
 558 set_timeout(const char *value) {
 559         isc_uint32_t n;
 560         isc_result_t result = parse_uint(&n, value, UINT_MAX, "timeout");
 561         if (result == ISC_R_SUCCESS)
 562                 timeout = n;
 563 }
 564
 565 static void
 566 set_tries(const char *value) {
 567         isc_uint32_t n;
 568         isc_result_t result = parse_uint(&n, value, INT_MAX, "tries");
 569         if (result == ISC_R_SUCCESS)
 570                 tries = n;
 571 }
 572
 573 static void
 574 set_ndots(const char *value) {
 575         isc_uint32_t n;
 576         isc_result_t result = parse_uint(&n, value, 128, "ndots");
 577         if (result == ISC_R_SUCCESS)
 578                 ndots = n;
 579 }
 580
 581 static void
 582 version(void) {
 583         fputs("nslookup " VERSION "\n", stderr);
 584 }
 585
 586 static void
 587 setoption(char *opt) {
 588         if (strncasecmp(opt, "all", 3) == 0) {
 589                 show_settings(ISC_TRUE, ISC_FALSE);
 590         } else if (strncasecmp(opt, "class=", 6) == 0) {
 591                 if (testclass(&opt[6]))
 592                         strlcpy(defclass, &opt[6], sizeof(defclass));
 593         } else if (strncasecmp(opt, "cl=", 3) == 0) {
 594                 if (testclass(&opt[3]))
 595                         strlcpy(defclass, &opt[3], sizeof(defclass));
 596         } else if (strncasecmp(opt, "type=", 5) == 0) {
 597                 if (testtype(&opt[5]))
 598                         strlcpy(deftype, &opt[5], sizeof(deftype));
 599         } else if (strncasecmp(opt, "ty=", 3) == 0) {
 600                 if (testtype(&opt[3]))
 601                         strlcpy(deftype, &opt[3], sizeof(deftype));
 602         } else if (strncasecmp(opt, "querytype=", 10) == 0) {
 603                 if (testtype(&opt[10]))
 604                         strlcpy(deftype, &opt[10], sizeof(deftype));
 605         } else if (strncasecmp(opt, "query=", 6) == 0) {
 606                 if (testtype(&opt[6]))
 607                         strlcpy(deftype, &opt[6], sizeof(deftype));
 608         } else if (strncasecmp(opt, "qu=", 3) == 0) {
 609                 if (testtype(&opt[3]))
 610                         strlcpy(deftype, &opt[3], sizeof(deftype));
 611         } else if (strncasecmp(opt, "q=", 2) == 0) {
 612                 if (testtype(&opt[2]))
 613                         strlcpy(deftype, &opt[2], sizeof(deftype));
 614         } else if (strncasecmp(opt, "domain=", 7) == 0) {
 615                 strlcpy(domainopt, &opt[7], sizeof(domainopt));
 616                 set_search_domain(domainopt);
 617                 usesearch = ISC_TRUE;
 618         } else if (strncasecmp(opt, "do=", 3) == 0) {
 619                 strlcpy(domainopt, &opt[3], sizeof(domainopt));
 620                 set_search_domain(domainopt);
 621                 usesearch = ISC_TRUE;
 622         } else if (strncasecmp(opt, "port=", 5) == 0) {
 623                 set_port(&opt[5]);
 624         } else if (strncasecmp(opt, "po=", 3) == 0) {
 625                 set_port(&opt[3]);
 626         } else if (strncasecmp(opt, "timeout=", 8) == 0) {
 627                 set_timeout(&opt[8]);
 628         } else if (strncasecmp(opt, "t=", 2) == 0) {
 629                 set_timeout(&opt[2]);
 630         } else if (strncasecmp(opt, "rec", 3) == 0) {
 631                 recurse = ISC_TRUE;
 632         } else if (strncasecmp(opt, "norec", 5) == 0) {
 633                 recurse = ISC_FALSE;
 634         } else if (strncasecmp(opt, "retry=", 6) == 0) {
 635                 set_tries(&opt[6]);
 636         } else if (strncasecmp(opt, "ret=", 4) == 0) {
 637                 set_tries(&opt[4]);
 638         } else if (strncasecmp(opt, "def", 3) == 0) {
 639                 usesearch = ISC_TRUE;
 640         } else if (strncasecmp(opt, "nodef", 5) == 0) {
 641                 usesearch = ISC_FALSE;
 642         } else if (strncasecmp(opt, "vc", 3) == 0) {
 643                 tcpmode = ISC_TRUE;
 644         } else if (strncasecmp(opt, "novc", 5) == 0) {
 645                 tcpmode = ISC_FALSE;
 646         } else if (strncasecmp(opt, "deb", 3) == 0) {
 647                 short_form = ISC_FALSE;
 648                 showsearch = ISC_TRUE;
 649         } else if (strncasecmp(opt, "nodeb", 5) == 0) {
 650                 short_form = ISC_TRUE;
 651                 showsearch = ISC_FALSE;
 652         } else if (strncasecmp(opt, "d2", 2) == 0) {
 653                 debugging = ISC_TRUE;
 654         } else if (strncasecmp(opt, "nod2", 4) == 0) {
 655                 debugging = ISC_FALSE;
 656         } else if (strncasecmp(opt, "search", 3) == 0) {
 657                 usesearch = ISC_TRUE;
 658         } else if (strncasecmp(opt, "nosearch", 5) == 0) {
 659                 usesearch = ISC_FALSE;
 660         } else if (strncasecmp(opt, "sil", 3) == 0) {
 661                 /* deprecation_msg = ISC_FALSE; */
 662         } else if (strncasecmp(opt, "fail", 3) == 0) {
 663                 nofail=ISC_FALSE;
 664         } else if (strncasecmp(opt, "nofail", 3) == 0) {
 665                 nofail=ISC_TRUE;
 666         } else if (strncasecmp(opt, "ndots=", 6) == 0) {
 667                 set_ndots(&opt[6]);
 668         } else {
 669                 printf("*** Invalid option: %s\n", opt);
 670         }
 671 }
 672
 673 static void
 674 addlookup(char *opt) {
 675         dig_lookup_t *lookup;
 676         isc_result_t result;
 677         isc_textregion_t tr;
 678         dns_rdatatype_t rdtype;
 679         dns_rdataclass_t rdclass;
 680         char store[MXNAME];
 681
 682         debug("addlookup()");
 683         tr.base = deftype;
 684         tr.length = strlen(deftype);
 685         result = dns_rdatatype_fromtext(&rdtype, &tr);
 686         if (result != ISC_R_SUCCESS) {
 687                 printf("unknown query type: %s\n", deftype);
 688                 rdclass = dns_rdatatype_a;
 689         }
 690         tr.base = defclass;
 691         tr.length = strlen(defclass);
 692         result = dns_rdataclass_fromtext(&rdclass, &tr);
 693         if (result != ISC_R_SUCCESS) {
 694                 printf("unknown query class: %s\n", defclass);
 695                 rdclass = dns_rdataclass_in;
 696         }
 697         lookup = make_empty_lookup();
 698         if (get_reverse(store, sizeof(store), opt, lookup->ip6_int, ISC_TRUE)
 699             == ISC_R_SUCCESS) {
 700                 strlcpy(lookup->textname, store, sizeof(lookup->textname));
 701                 lookup->rdtype = dns_rdatatype_ptr;
 702                 lookup->rdtypeset = ISC_TRUE;
 703         } else {
 704                 strlcpy(lookup->textname, opt, sizeof(lookup->textname));
 705                 lookup->rdtype = rdtype;
 706                 lookup->rdtypeset = ISC_TRUE;
 707         }
 708         lookup->rdclass = rdclass;
 709         lookup->rdclassset = ISC_TRUE;
 710         lookup->trace = ISC_FALSE;
 711         lookup->trace_root = lookup->trace;
 712         lookup->ns_search_only = ISC_FALSE;
 713         lookup->identify = identify;
 714         lookup->recurse = recurse;
 715         lookup->aaonly = aaonly;
 716         lookup->retries = tries;
 717         lookup->udpsize = 0;
 718         lookup->comments = comments;
 719         lookup->tcp_mode = tcpmode;
 720         lookup->stats = stats;
 721         lookup->section_question = section_question;
 722         lookup->section_answer = section_answer;
 723         lookup->section_authority = section_authority;
 724         lookup->section_additional = section_additional;
 725         lookup->new_search = ISC_TRUE;
 726         if (nofail)
 727                 lookup->servfail_stops = ISC_FALSE;
 728         ISC_LIST_INIT(lookup->q);
 729         ISC_LINK_INIT(lookup, link);
 730         ISC_LIST_APPEND(lookup_list, lookup, link);
 731         lookup->origin = NULL;
 732         ISC_LIST_INIT(lookup->my_server_list);
 733         debug("looking up %s", lookup->textname);
 734 }
 735
 736 static void
 737 do_next_command(char *input) {
 738         char *ptr, *arg;
 739
 740         ptr = next_token(&input, " \t\r\n");
 741         if (ptr == NULL)
 742                 return;
 743         arg = next_token(&input, " \t\r\n");
 744         if ((strcasecmp(ptr, "set") == 0) &&
 745             (arg != NULL))
 746                 setoption(arg);
 747         else if ((strcasecmp(ptr, "server") == 0) ||
 748                  (strcasecmp(ptr, "lserver") == 0)) {
 749                 isc_app_block();
 750                 set_nameserver(arg);
 751                 check_ra = ISC_FALSE;
 752                 isc_app_unblock();
 753                 show_settings(ISC_TRUE, ISC_TRUE);
 754         } else if (strcasecmp(ptr, "exit") == 0) {
 755                 in_use = ISC_FALSE;
 756         } else if (strcasecmp(ptr, "help") == 0 ||
 757                    strcasecmp(ptr, "?") == 0) {
 758                 printf("The '%s' command is not yet implemented.\n", ptr);
 759         } else if (strcasecmp(ptr, "finger") == 0 ||
 760                    strcasecmp(ptr, "root") == 0 ||
 761                    strcasecmp(ptr, "ls") == 0 ||
 762                    strcasecmp(ptr, "view") == 0) {
 763                 printf("The '%s' command is not implemented.\n", ptr);
 764         } else
 765                 addlookup(ptr);
 766 }
 767
 768 static void
 769 get_next_command(void) {
 770         char *buf;
 771         char *ptr;
 772
 773         fflush(stdout);
 774         buf = isc_mem_allocate(mctx, COMMSIZE);
 775         if (buf == NULL)
 776                 fatal("memory allocation failure");
 777         isc_app_block();
 778         if (interactive) {
 779 #ifdef HAVE_READLINE
 780                 ptr = readline("> ");
 781                 if (ptr != NULL)
 782                         add_history(ptr);
 783 #else
 784                 fputs("> ", stderr);
 785                 fflush(stderr);
 786                 ptr = fgets(buf, COMMSIZE, stdin);
 787 #endif
 788         } else
 789                 ptr = fgets(buf, COMMSIZE, stdin);
 790         isc_app_unblock();
 791         if (ptr == NULL) {
 792                 in_use = ISC_FALSE;
 793         } else
 794                 do_next_command(ptr);
 795 #ifdef HAVE_READLINE
 796         if (interactive)
 797                 free(ptr);
 798 #endif
 799         isc_mem_free(mctx, buf);
 800 }
 801
 802 static void
 803 parse_args(int argc, char **argv) {
 804         isc_boolean_t have_lookup = ISC_FALSE;
 805
 806         usesearch = ISC_TRUE;
 807         for (argc--, argv++; argc > 0; argc--, argv++) {
 808                 debug("main parsing %s", argv[0]);
 809                 if (argv[0][0] == '-') {
 810                         if (strncasecmp(argv[0], "-ver", 4) == 0) {
 811                                 version();
 812                                 exit(0);
 813                         } else if (argv[0][1] != 0) {
 814                                 setoption(&argv[0][1]);
 815                         } else
 816                                 have_lookup = ISC_TRUE;
 817                 } else {
 818                         if (!have_lookup) {
 819                                 have_lookup = ISC_TRUE;
 820                                 in_use = ISC_TRUE;
 821                                 addlookup(argv[0]);
 822                         } else {
 823                                 set_nameserver(argv[0]);
 824                                 check_ra = ISC_FALSE;
 825                         }
 826                 }
 827         }
 828 }
 829
 830 static void
 831 flush_lookup_list(void) {
 832         dig_lookup_t *l, *lp;
 833         dig_query_t *q, *qp;
 834         dig_server_t *s, *sp;
 835
 836         lookup_counter = 0;
 837         l = ISC_LIST_HEAD(lookup_list);
 838         while (l != NULL) {
 839                 q = ISC_LIST_HEAD(l->q);
 840                 while (q != NULL) {
 841                         if (q->sock != NULL) {
 842                                 isc_socket_cancel(q->sock, NULL,
 843                                                   ISC_SOCKCANCEL_ALL);
 844                                 isc_socket_detach(&q->sock);
 845                         }
 846                         if (ISC_LINK_LINKED(&q->recvbuf, link))
 847                                 ISC_LIST_DEQUEUE(q->recvlist, &q->recvbuf,
 848                                                  link);
 849                         if (ISC_LINK_LINKED(&q->lengthbuf, link))
 850                                 ISC_LIST_DEQUEUE(q->lengthlist, &q->lengthbuf,
 851                                                  link);
 852                         isc_buffer_invalidate(&q->recvbuf);
 853                         isc_buffer_invalidate(&q->lengthbuf);
 854                         qp = q;
 855                         q = ISC_LIST_NEXT(q, link);
 856                         ISC_LIST_DEQUEUE(l->q, qp, link);
 857                         isc_mem_free(mctx, qp);
 858                 }
 859                 s = ISC_LIST_HEAD(l->my_server_list);
 860                 while (s != NULL) {
 861                         sp = s;
 862                         s = ISC_LIST_NEXT(s, link);
 863                         ISC_LIST_DEQUEUE(l->my_server_list, sp, link);
 864                         isc_mem_free(mctx, sp);
 865
 866                 }
 867                 if (l->sendmsg != NULL)
 868                         dns_message_destroy(&l->sendmsg);
 869                 if (l->timer != NULL)
 870                         isc_timer_detach(&l->timer);
 871                 lp = l;
 872                 l = ISC_LIST_NEXT(l, link);
 873                 ISC_LIST_DEQUEUE(lookup_list, lp, link);
 874                 isc_mem_free(mctx, lp);
 875         }
 876 }
 877
 878 static void
 879 getinput(isc_task_t *task, isc_event_t *event) {
 880         UNUSED(task);
 881         if (global_event == NULL)
 882                 global_event = event;
 883         while (in_use) {
 884                 get_next_command();
 885                 if (ISC_LIST_HEAD(lookup_list) != NULL) {
 886                         start_lookup();
 887                         return;
 888                 }
 889         }
 890         isc_app_shutdown();
 891 }
 892
 893 int
 894 main(int argc, char **argv) {
 895         isc_result_t result;
 896
 897         interactive = ISC_TF(isatty(0));
 898
 899         ISC_LIST_INIT(lookup_list);
 900         ISC_LIST_INIT(server_list);
 901         ISC_LIST_INIT(search_list);
 902
 903         check_ra = ISC_TRUE;
 904
 905         result = isc_app_start();
 906         check_result(result, "isc_app_start");
 907
 908         setup_libs();
 909         progname = argv[0];
 910
 911         parse_args(argc, argv);
 912
 913         setup_system();
 914         if (domainopt[0] != '\0')
 915                 set_search_domain(domainopt);
 916         if (in_use)
 917                 result = isc_app_onrun(mctx, global_task, onrun_callback,
 918                                        NULL);
 919         else
 920                 result = isc_app_onrun(mctx, global_task, getinput, NULL);
 921         check_result(result, "isc_app_onrun");
 922         in_use = ISC_TF(!in_use);
 923
 924         (void)isc_app_run();
 925
 926         puts("");
 927         debug("done, and starting to shut down");
 928         if (global_event != NULL)
 929                 isc_event_free(&global_event);
 930         cancel_all();
 931         destroy_libs();
 932         isc_app_finish();
 933
 934         return (query_error | print_error);
 935 }