contrib/bind9/bin/dig/nslookup.c

   1 /*
   2  * Copyright (C) 2004-2013  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: nslookup.c,v 1.130 2011/12/16 23:01:16 each Exp $ */
  19
  20 #include <config.h>
  21
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24
  25 #include <isc/app.h>
  26 #include <isc/buffer.h>
  27 #include <isc/commandline.h>
  28 #include <isc/event.h>
  29 #include <isc/parseint.h>
  30 #include <isc/print.h>
  31 #include <isc/string.h>
  32 #include <isc/timer.h>
  33 #include <isc/util.h>
  34 #include <isc/task.h>
  35 #include <isc/netaddr.h>
  36
  37 #include <dns/message.h>
  38 #include <dns/name.h>
  39 #include <dns/fixedname.h>
  40 #include <dns/rdata.h>
  41 #include <dns/rdataclass.h>
  42 #include <dns/rdataset.h>
  43 #include <dns/rdatastruct.h>
  44 #include <dns/rdatatype.h>
  45 #include <dns/byaddr.h>
  46
  47 #include <dig/dig.h>
  48
  49 #if defined(HAVE_READLINE)
  50 #include <readline/readline.h>
  51 #include <readline/history.h>
  52 #endif
  53
  54 static isc_boolean_t short_form = ISC_TRUE,
  55         tcpmode = ISC_FALSE,
  56         identify = ISC_FALSE, stats = ISC_TRUE,
  57         comments = ISC_TRUE, section_question = ISC_TRUE,
  58         section_answer = ISC_TRUE, section_authority = ISC_TRUE,
  59         section_additional = ISC_TRUE, recurse = ISC_TRUE,
  60         aaonly = ISC_FALSE, nofail = ISC_TRUE;
  61
  62 static isc_boolean_t interactive;
  63
  64 static isc_boolean_t in_use = ISC_FALSE;
  65 static char defclass[MXRD] = "IN";
  66 static char deftype[MXRD] = "A";
  67 static isc_event_t *global_event = NULL;
  68 static int query_error = 1, print_error = 0;
  69
  70 static char domainopt[DNS_NAME_MAXTEXT];
  71
  72 static const char *rcodetext[] = {
  73         "NOERROR",
  74         "FORMERR",
  75         "SERVFAIL",
  76         "NXDOMAIN",
  77         "NOTIMP",
  78         "REFUSED",
  79         "YXDOMAIN",
  80         "YXRRSET",
  81         "NXRRSET",
  82         "NOTAUTH",
  83         "NOTZONE",
  84         "RESERVED11",
  85         "RESERVED12",
  86         "RESERVED13",
  87         "RESERVED14",
  88         "RESERVED15",
  89         "BADVERS"
  90 };
  91
  92 static const char *rtypetext[] = {
  93         "rtype_0 = ",                   /* 0 */
  94         "internet address = ",          /* 1 */
  95         "nameserver = ",                /* 2 */
  96         "md = ",                        /* 3 */
  97         "mf = ",                        /* 4 */
  98         "canonical name = ",            /* 5 */
  99         "soa = ",                       /* 6 */
 100         "mb = ",                        /* 7 */
 101         "mg = ",                        /* 8 */
 102         "mr = ",                        /* 9 */
 103         "rtype_10 = ",                  /* 10 */
 104         "protocol = ",                  /* 11 */
 105         "name = ",                      /* 12 */
 106         "hinfo = ",                     /* 13 */
 107         "minfo = ",                     /* 14 */
 108         "mail exchanger = ",            /* 15 */
 109         "text = ",                      /* 16 */
 110         "rp = ",                        /* 17 */
 111         "afsdb = ",                     /* 18 */
 112         "x25 address = ",               /* 19 */
 113         "isdn address = ",              /* 20 */
 114         "rt = ",                        /* 21 */
 115         "nsap = ",                      /* 22 */
 116         "nsap_ptr = ",                  /* 23 */
 117         "signature = ",                 /* 24 */
 118         "key = ",                       /* 25 */
 119         "px = ",                        /* 26 */
 120         "gpos = ",                      /* 27 */
 121         "has AAAA address ",            /* 28 */
 122         "loc = ",                       /* 29 */
 123         "next = ",                      /* 30 */
 124         "rtype_31 = ",                  /* 31 */
 125         "rtype_32 = ",                  /* 32 */
 126         "service = ",                   /* 33 */
 127         "rtype_34 = ",                  /* 34 */
 128         "naptr = ",                     /* 35 */
 129         "kx = ",                        /* 36 */
 130         "cert = ",                      /* 37 */
 131         "v6 address = ",                /* 38 */
 132         "dname = ",                     /* 39 */
 133         "rtype_40 = ",                  /* 40 */
 134         "optional = "                   /* 41 */
 135 };
 136
 137 #define N_KNOWN_RRTYPES (sizeof(rtypetext) / sizeof(rtypetext[0]))
 138
 139 static void flush_lookup_list(void);
 140 static void getinput(isc_task_t *task, isc_event_t *event);
 141
 142 static char *
 143 rcode_totext(dns_rcode_t rcode)
 144 {
 145         static char buf[sizeof("?65535")];
 146         union {
 147                 const char *consttext;
 148                 char *deconsttext;
 149         } totext;
 150
 151         if (rcode >= (sizeof(rcodetext)/sizeof(rcodetext[0]))) {
 152                 snprintf(buf, sizeof(buf), "?%u", rcode);
 153                 totext.deconsttext = buf;
 154         } else
 155                 totext.consttext = rcodetext[rcode];
 156         return totext.deconsttext;
 157 }
 158
 159 void
 160 dighost_shutdown(void) {
 161         isc_event_t *event = global_event;
 162
 163         flush_lookup_list();
 164         debug("dighost_shutdown()");
 165
 166         if (!in_use) {
 167                 isc_app_shutdown();
 168                 return;
 169         }
 170
 171         isc_task_send(global_task, &event);
 172 }
 173
 174 static void
 175 printsoa(dns_rdata_t *rdata) {
 176         dns_rdata_soa_t soa;
 177         isc_result_t result;
 178         char namebuf[DNS_NAME_FORMATSIZE];
 179
 180         result = dns_rdata_tostruct(rdata, &soa, NULL);
 181         check_result(result, "dns_rdata_tostruct");
 182
 183         dns_name_format(&soa.origin, namebuf, sizeof(namebuf));
 184         printf("\torigin = %s\n", namebuf);
 185         dns_name_format(&soa.contact, namebuf, sizeof(namebuf));
 186         printf("\tmail addr = %s\n", namebuf);
 187         printf("\tserial = %u\n", soa.serial);
 188         printf("\trefresh = %u\n", soa.refresh);
 189         printf("\tretry = %u\n", soa.retry);
 190         printf("\texpire = %u\n", soa.expire);
 191         printf("\tminimum = %u\n", soa.minimum);
 192         dns_rdata_freestruct(&soa);
 193 }
 194
 195 static void
 196 printa(dns_rdata_t *rdata) {
 197         isc_result_t result;
 198         char text[sizeof("255.255.255.255")];
 199         isc_buffer_t b;
 200
 201         isc_buffer_init(&b, text, sizeof(text));
 202         result = dns_rdata_totext(rdata, NULL, &b);
 203         check_result(result, "dns_rdata_totext");
 204         printf("Address: %.*s\n", (int)isc_buffer_usedlength(&b),
 205                (char *)isc_buffer_base(&b));
 206 }
 207 #ifdef DIG_SIGCHASE
 208 /* Just for compatibility : not use in host program */
 209 isc_result_t
 210 printrdataset(dns_name_t *owner_name, dns_rdataset_t *rdataset,
 211               isc_buffer_t *target)
 212 {
 213         UNUSED(owner_name);
 214         UNUSED(rdataset);
 215         UNUSED(target);
 216         return(ISC_FALSE);
 217 }
 218 #endif
 219 static void
 220 printrdata(dns_rdata_t *rdata) {
 221         isc_result_t result;
 222         isc_buffer_t *b = NULL;
 223         unsigned int size = 1024;
 224         isc_boolean_t done = ISC_FALSE;
 225
 226         if (rdata->type < N_KNOWN_RRTYPES)
 227                 printf("%s", rtypetext[rdata->type]);
 228         else
 229                 printf("rdata_%d = ", rdata->type);
 230
 231         while (!done) {
 232                 result = isc_buffer_allocate(mctx, &b, size);
 233                 if (result != ISC_R_SUCCESS)
 234                         check_result(result, "isc_buffer_allocate");
 235                 result = dns_rdata_totext(rdata, NULL, b);
 236                 if (result == ISC_R_SUCCESS) {
 237                         printf("%.*s\n", (int)isc_buffer_usedlength(b),
 238                                (char *)isc_buffer_base(b));
 239                         done = ISC_TRUE;
 240                 } else if (result != ISC_R_NOSPACE)
 241                         check_result(result, "dns_rdata_totext");
 242                 isc_buffer_free(&b);
 243                 size *= 2;
 244         }
 245 }
 246
 247 static isc_result_t
 248 printsection(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers,
 249              dns_section_t section) {
 250         isc_result_t result, loopresult;
 251         dns_name_t *name;
 252         dns_rdataset_t *rdataset = NULL;
 253         dns_rdata_t rdata = DNS_RDATA_INIT;
 254         char namebuf[DNS_NAME_FORMATSIZE];
 255
 256         UNUSED(query);
 257         UNUSED(headers);
 258
 259         debug("printsection()");
 260
 261         result = dns_message_firstname(msg, section);
 262         if (result == ISC_R_NOMORE)
 263                 return (ISC_R_SUCCESS);
 264         else if (result != ISC_R_SUCCESS)
 265                 return (result);
 266         for (;;) {
 267                 name = NULL;
 268                 dns_message_currentname(msg, section,
 269                                         &name);
 270                 for (rdataset = ISC_LIST_HEAD(name->list);
 271                      rdataset != NULL;
 272                      rdataset = ISC_LIST_NEXT(rdataset, link)) {
 273                         loopresult = dns_rdataset_first(rdataset);
 274                         while (loopresult == ISC_R_SUCCESS) {
 275                                 dns_rdataset_current(rdataset, &rdata);
 276                                 switch (rdata.type) {
 277                                 case dns_rdatatype_a:
 278                                         if (section != DNS_SECTION_ANSWER)
 279                                                 goto def_short_section;
 280                                         dns_name_format(name, namebuf,
 281                                                         sizeof(namebuf));
 282                                         printf("Name:\t%s\n", namebuf);
 283                                         printa(&rdata);
 284                                         break;
 285                                 case dns_rdatatype_soa:
 286                                         dns_name_format(name, namebuf,
 287                                                         sizeof(namebuf));
 288                                         printf("%s\n", namebuf);
 289                                         printsoa(&rdata);
 290                                         break;
 291                                 default:
 292                                 def_short_section:
 293                                         dns_name_format(name, namebuf,
 294                                                         sizeof(namebuf));
 295                                         printf("%s\t", namebuf);
 296                                         printrdata(&rdata);
 297                                         break;
 298                                 }
 299                                 dns_rdata_reset(&rdata);
 300                                 loopresult = dns_rdataset_next(rdataset);
 301                         }
 302                 }
 303                 result = dns_message_nextname(msg, section);
 304                 if (result == ISC_R_NOMORE)
 305                         break;
 306                 else if (result != ISC_R_SUCCESS) {
 307                         return (result);
 308                 }
 309         }
 310         return (ISC_R_SUCCESS);
 311 }
 312
 313 static isc_result_t
 314 detailsection(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers,
 315              dns_section_t section) {
 316         isc_result_t result, loopresult;
 317         dns_name_t *name;
 318         dns_rdataset_t *rdataset = NULL;
 319         dns_rdata_t rdata = DNS_RDATA_INIT;
 320         char namebuf[DNS_NAME_FORMATSIZE];
 321
 322         UNUSED(query);
 323
 324         debug("detailsection()");
 325
 326         if (headers) {
 327                 switch (section) {
 328                 case DNS_SECTION_QUESTION:
 329                         puts("    QUESTIONS:");
 330                         break;
 331                 case DNS_SECTION_ANSWER:
 332                         puts("    ANSWERS:");
 333                         break;
 334                 case DNS_SECTION_AUTHORITY:
 335                         puts("    AUTHORITY RECORDS:");
 336                         break;
 337                 case DNS_SECTION_ADDITIONAL:
 338                         puts("    ADDITIONAL RECORDS:");
 339                         break;
 340                 }
 341         }
 342
 343         result = dns_message_firstname(msg, section);
 344         if (result == ISC_R_NOMORE)
 345                 return (ISC_R_SUCCESS);
 346         else if (result != ISC_R_SUCCESS)
 347                 return (result);
 348         for (;;) {
 349                 name = NULL;
 350                 dns_message_currentname(msg, section,
 351                                         &name);
 352                 for (rdataset = ISC_LIST_HEAD(name->list);
 353                      rdataset != NULL;
 354                      rdataset = ISC_LIST_NEXT(rdataset, link)) {
 355                         if (section == DNS_SECTION_QUESTION) {
 356                                 dns_name_format(name, namebuf,
 357                                                 sizeof(namebuf));
 358                                 printf("\t%s, ", namebuf);
 359                                 dns_rdatatype_format(rdataset->type,
 360                                                      namebuf,
 361                                                      sizeof(namebuf));
 362                                 printf("type = %s, ", namebuf);
 363                                 dns_rdataclass_format(rdataset->rdclass,
 364                                                       namebuf,
 365                                                       sizeof(namebuf));
 366                                 printf("class = %s\n", namebuf);
 367                         }
 368                         loopresult = dns_rdataset_first(rdataset);
 369                         while (loopresult == ISC_R_SUCCESS) {
 370                                 dns_rdataset_current(rdataset, &rdata);
 371
 372                                 dns_name_format(name, namebuf,
 373                                                 sizeof(namebuf));
 374                                 printf("    ->  %s\n", namebuf);
 375
 376                                 switch (rdata.type) {
 377                                 case dns_rdatatype_soa:
 378                                         printsoa(&rdata);
 379                                         break;
 380                                 default:
 381                                         printf("\t");
 382                                         printrdata(&rdata);
 383                                 }
 384                                 dns_rdata_reset(&rdata);
 385                                 printf("\tttl = %u\n", rdataset->ttl);
 386                                 loopresult = dns_rdataset_next(rdataset);
 387                         }
 388                 }
 389                 result = dns_message_nextname(msg, section);
 390                 if (result == ISC_R_NOMORE)
 391                         break;
 392                 else if (result != ISC_R_SUCCESS) {
 393                         return (result);
 394                 }
 395         }
 396         return (ISC_R_SUCCESS);
 397 }
 398
 399 void
 400 received(int bytes, isc_sockaddr_t *from, dig_query_t *query)
 401 {
 402         UNUSED(bytes);
 403         UNUSED(from);
 404         UNUSED(query);
 405 }
 406
 407 void
 408 trying(char *frm, dig_lookup_t *lookup) {
 409         UNUSED(frm);
 410         UNUSED(lookup);
 411
 412 }
 413
 414 isc_result_t
 415 printmessage(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers) {
 416         char servtext[ISC_SOCKADDR_FORMATSIZE];
 417
 418         /* I've we've gotten this far, we've reached a server. */
 419         query_error = 0;
 420
 421         debug("printmessage()");
 422
 423         isc_sockaddr_format(&query->sockaddr, servtext, sizeof(servtext));
 424         printf("Server:\t\t%s\n", query->userarg);
 425         printf("Address:\t%s\n", servtext);
 426
 427         puts("");
 428
 429         if (!short_form) {
 430                 isc_boolean_t headers = ISC_TRUE;
 431                 puts("------------");
 432                 /*              detailheader(query, msg);*/
 433                 detailsection(query, msg, headers, DNS_SECTION_QUESTION);
 434                 detailsection(query, msg, headers, DNS_SECTION_ANSWER);
 435                 detailsection(query, msg, headers, DNS_SECTION_AUTHORITY);
 436                 detailsection(query, msg, headers, DNS_SECTION_ADDITIONAL);
 437                 puts("------------");
 438         }
 439
 440         if (msg->rcode != 0) {
 441                 char nametext[DNS_NAME_FORMATSIZE];
 442                 dns_name_format(query->lookup->name,
 443                                 nametext, sizeof(nametext));
 444                 printf("** server can't find %s: %s\n",
 445                        nametext, rcode_totext(msg->rcode));
 446                 debug("returning with rcode == 0");
 447
 448                 /* the lookup failed */
 449                 print_error |= 1;
 450                 return (ISC_R_SUCCESS);
 451         }
 452
 453         if ((msg->flags & DNS_MESSAGEFLAG_AA) == 0)
 454                 puts("Non-authoritative answer:");
 455         if (!ISC_LIST_EMPTY(msg->sections[DNS_SECTION_ANSWER]))
 456                 printsection(query, msg, headers, DNS_SECTION_ANSWER);
 457         else
 458                 printf("*** Can't find %s: No answer\n",
 459                        query->lookup->textname);
 460
 461         if (((msg->flags & DNS_MESSAGEFLAG_AA) == 0) &&
 462             (query->lookup->rdtype != dns_rdatatype_a)) {
 463                 puts("\nAuthoritative answers can be found from:");
 464                 printsection(query, msg, headers,
 465                              DNS_SECTION_AUTHORITY);
 466                 printsection(query, msg, headers,
 467                              DNS_SECTION_ADDITIONAL);
 468         }
 469         return (ISC_R_SUCCESS);
 470 }
 471
 472 static void
 473 show_settings(isc_boolean_t full, isc_boolean_t serv_only) {
 474         dig_server_t *srv;
 475         isc_sockaddr_t sockaddr;
 476         dig_searchlist_t *listent;
 477         isc_result_t result;
 478
 479         srv = ISC_LIST_HEAD(server_list);
 480
 481         while (srv != NULL) {
 482                 char sockstr[ISC_SOCKADDR_FORMATSIZE];
 483
 484                 result = get_address(srv->servername, port, &sockaddr);
 485                 check_result(result, "get_address");
 486
 487                 isc_sockaddr_format(&sockaddr, sockstr, sizeof(sockstr));
 488                 printf("Default server: %s\nAddress: %s\n",
 489                         srv->userarg, sockstr);
 490                 if (!full)
 491                         return;
 492                 srv = ISC_LIST_NEXT(srv, link);
 493         }
 494         if (serv_only)
 495                 return;
 496         printf("\nSet options:\n");
 497         printf("  %s\t\t\t%s\t\t%s\n",
 498                tcpmode ? "vc" : "novc",
 499                short_form ? "nodebug" : "debug",
 500                debugging ? "d2" : "nod2");
 501         printf("  %s\t\t%s\n",
 502                usesearch ? "search" : "nosearch",
 503                recurse ? "recurse" : "norecurse");
 504         printf("  timeout = %d\t\tretry = %d\tport = %d\tndots = %d\n",
 505                timeout, tries, port, ndots);
 506         printf("  querytype = %-8s\tclass = %s\n", deftype, defclass);
 507         printf("  srchlist = ");
 508         for (listent = ISC_LIST_HEAD(search_list);
 509              listent != NULL;
 510              listent = ISC_LIST_NEXT(listent, link)) {
 511                      printf("%s", listent->origin);
 512                      if (ISC_LIST_NEXT(listent, link) != NULL)
 513                              printf("/");
 514         }
 515         printf("\n");
 516 }
 517
 518 static isc_boolean_t
 519 testtype(char *typetext) {
 520         isc_result_t result;
 521         isc_textregion_t tr;
 522         dns_rdatatype_t rdtype;
 523
 524         tr.base = typetext;
 525         tr.length = strlen(typetext);
 526         result = dns_rdatatype_fromtext(&rdtype, &tr);
 527         if (result == ISC_R_SUCCESS)
 528                 return (ISC_TRUE);
 529         else {
 530                 printf("unknown query type: %s\n", typetext);
 531                 return (ISC_FALSE);
 532         }
 533 }
 534
 535 static isc_boolean_t
 536 testclass(char *typetext) {
 537         isc_result_t result;
 538         isc_textregion_t tr;
 539         dns_rdataclass_t rdclass;
 540
 541         tr.base = typetext;
 542         tr.length = strlen(typetext);
 543         result = dns_rdataclass_fromtext(&rdclass, &tr);
 544         if (result == ISC_R_SUCCESS)
 545                 return (ISC_TRUE);
 546         else {
 547                 printf("unknown query class: %s\n", typetext);
 548                 return (ISC_FALSE);
 549         }
 550 }
 551
 552 static void
 553 set_port(const char *value) {
 554         isc_uint32_t n;
 555         isc_result_t result = parse_uint(&n, value, 65535, "port");
 556         if (result == ISC_R_SUCCESS)
 557                 port = (isc_uint16_t) n;
 558 }
 559
 560 static void
 561 set_timeout(const char *value) {
 562         isc_uint32_t n;
 563         isc_result_t result = parse_uint(&n, value, UINT_MAX, "timeout");
 564         if (result == ISC_R_SUCCESS)
 565                 timeout = n;
 566 }
 567
 568 static void
 569 set_tries(const char *value) {
 570         isc_uint32_t n;
 571         isc_result_t result = parse_uint(&n, value, INT_MAX, "tries");
 572         if (result == ISC_R_SUCCESS)
 573                 tries = n;
 574 }
 575
 576 static void
 577 set_ndots(const char *value) {
 578         isc_uint32_t n;
 579         isc_result_t result = parse_uint(&n, value, 128, "ndots");
 580         if (result == ISC_R_SUCCESS)
 581                 ndots = n;
 582 }
 583
 584 static void
 585 setoption(char *opt) {
 586         if (strncasecmp(opt, "all", 4) == 0) {
 587                 show_settings(ISC_TRUE, ISC_FALSE);
 588         } else if (strncasecmp(opt, "class=", 6) == 0) {
 589                 if (testclass(&opt[6]))
 590                         strlcpy(defclass, &opt[6], sizeof(defclass));
 591         } else if (strncasecmp(opt, "cl=", 3) == 0) {
 592                 if (testclass(&opt[3]))
 593                         strlcpy(defclass, &opt[3], sizeof(defclass));
 594         } else if (strncasecmp(opt, "type=", 5) == 0) {
 595                 if (testtype(&opt[5]))
 596                         strlcpy(deftype, &opt[5], sizeof(deftype));
 597         } else if (strncasecmp(opt, "ty=", 3) == 0) {
 598                 if (testtype(&opt[3]))
 599                         strlcpy(deftype, &opt[3], sizeof(deftype));
 600         } else if (strncasecmp(opt, "querytype=", 10) == 0) {
 601                 if (testtype(&opt[10]))
 602                         strlcpy(deftype, &opt[10], sizeof(deftype));
 603         } else if (strncasecmp(opt, "query=", 6) == 0) {
 604                 if (testtype(&opt[6]))
 605                         strlcpy(deftype, &opt[6], sizeof(deftype));
 606         } else if (strncasecmp(opt, "qu=", 3) == 0) {
 607                 if (testtype(&opt[3]))
 608                         strlcpy(deftype, &opt[3], sizeof(deftype));
 609         } else if (strncasecmp(opt, "q=", 2) == 0) {
 610                 if (testtype(&opt[2]))
 611                         strlcpy(deftype, &opt[2], sizeof(deftype));
 612         } else if (strncasecmp(opt, "domain=", 7) == 0) {
 613                 strlcpy(domainopt, &opt[7], sizeof(domainopt));
 614                 set_search_domain(domainopt);
 615                 usesearch = ISC_TRUE;
 616         } else if (strncasecmp(opt, "do=", 3) == 0) {
 617                 strlcpy(domainopt, &opt[3], sizeof(domainopt));
 618                 set_search_domain(domainopt);
 619                 usesearch = ISC_TRUE;
 620         } else if (strncasecmp(opt, "port=", 5) == 0) {
 621                 set_port(&opt[5]);
 622         } else if (strncasecmp(opt, "po=", 3) == 0) {
 623                 set_port(&opt[3]);
 624         } else if (strncasecmp(opt, "timeout=", 8) == 0) {
 625                 set_timeout(&opt[8]);
 626         } else if (strncasecmp(opt, "t=", 2) == 0) {
 627                 set_timeout(&opt[2]);
 628         } else if (strncasecmp(opt, "rec", 3) == 0) {
 629                 recurse = ISC_TRUE;
 630         } else if (strncasecmp(opt, "norec", 5) == 0) {
 631                 recurse = ISC_FALSE;
 632         } else if (strncasecmp(opt, "retry=", 6) == 0) {
 633                 set_tries(&opt[6]);
 634         } else if (strncasecmp(opt, "ret=", 4) == 0) {
 635                 set_tries(&opt[4]);
 636         } else if (strncasecmp(opt, "def", 3) == 0) {
 637                 usesearch = ISC_TRUE;
 638         } else if (strncasecmp(opt, "nodef", 5) == 0) {
 639                 usesearch = ISC_FALSE;
 640         } else if (strncasecmp(opt, "vc", 3) == 0) {
 641                 tcpmode = ISC_TRUE;
 642         } else if (strncasecmp(opt, "novc", 5) == 0) {
 643                 tcpmode = ISC_FALSE;
 644         } else if (strncasecmp(opt, "deb", 3) == 0) {
 645                 short_form = ISC_FALSE;
 646                 showsearch = ISC_TRUE;
 647         } else if (strncasecmp(opt, "nodeb", 5) == 0) {
 648                 short_form = ISC_TRUE;
 649                 showsearch = ISC_FALSE;
 650         } else if (strncasecmp(opt, "d2", 2) == 0) {
 651                 debugging = ISC_TRUE;
 652         } else if (strncasecmp(opt, "nod2", 4) == 0) {
 653                 debugging = ISC_FALSE;
 654         } else if (strncasecmp(opt, "search", 3) == 0) {
 655                 usesearch = ISC_TRUE;
 656         } else if (strncasecmp(opt, "nosearch", 5) == 0) {
 657                 usesearch = ISC_FALSE;
 658         } else if (strncasecmp(opt, "sil", 3) == 0) {
 659                 /* deprecation_msg = ISC_FALSE; */
 660         } else if (strncasecmp(opt, "fail", 3) == 0) {
 661                 nofail=ISC_FALSE;
 662         } else if (strncasecmp(opt, "nofail", 3) == 0) {
 663                 nofail=ISC_TRUE;
 664         } else if (strncasecmp(opt, "ndots=", 6) == 0) {
 665                 set_ndots(&opt[6]);
 666         } else {
 667                 printf("*** Invalid option: %s\n", opt);
 668         }
 669 }
 670
 671 static void
 672 addlookup(char *opt) {
 673         dig_lookup_t *lookup;
 674         isc_result_t result;
 675         isc_textregion_t tr;
 676         dns_rdatatype_t rdtype;
 677         dns_rdataclass_t rdclass;
 678         char store[MXNAME];
 679
 680         debug("addlookup()");
 681         tr.base = deftype;
 682         tr.length = strlen(deftype);
 683         result = dns_rdatatype_fromtext(&rdtype, &tr);
 684         if (result != ISC_R_SUCCESS) {
 685                 printf("unknown query type: %s\n", deftype);
 686                 rdclass = dns_rdatatype_a;
 687         }
 688         tr.base = defclass;
 689         tr.length = strlen(defclass);
 690         result = dns_rdataclass_fromtext(&rdclass, &tr);
 691         if (result != ISC_R_SUCCESS) {
 692                 printf("unknown query class: %s\n", defclass);
 693                 rdclass = dns_rdataclass_in;
 694         }
 695         lookup = make_empty_lookup();
 696         if (get_reverse(store, sizeof(store), opt, lookup->ip6_int, ISC_TRUE)
 697             == ISC_R_SUCCESS) {
 698                 strlcpy(lookup->textname, store, sizeof(lookup->textname));
 699                 lookup->rdtype = dns_rdatatype_ptr;
 700                 lookup->rdtypeset = ISC_TRUE;
 701         } else {
 702                 strlcpy(lookup->textname, opt, sizeof(lookup->textname));
 703                 lookup->rdtype = rdtype;
 704                 lookup->rdtypeset = ISC_TRUE;
 705         }
 706         lookup->rdclass = rdclass;
 707         lookup->rdclassset = ISC_TRUE;
 708         lookup->trace = ISC_FALSE;
 709         lookup->trace_root = lookup->trace;
 710         lookup->ns_search_only = ISC_FALSE;
 711         lookup->identify = identify;
 712         lookup->recurse = recurse;
 713         lookup->aaonly = aaonly;
 714         lookup->retries = tries;
 715         lookup->udpsize = 0;
 716         lookup->comments = comments;
 717         lookup->tcp_mode = tcpmode;
 718         lookup->stats = stats;
 719         lookup->section_question = section_question;
 720         lookup->section_answer = section_answer;
 721         lookup->section_authority = section_authority;
 722         lookup->section_additional = section_additional;
 723         lookup->new_search = ISC_TRUE;
 724         if (nofail)
 725                 lookup->servfail_stops = ISC_FALSE;
 726         ISC_LIST_INIT(lookup->q);
 727         ISC_LINK_INIT(lookup, link);
 728         ISC_LIST_APPEND(lookup_list, lookup, link);
 729         lookup->origin = NULL;
 730         ISC_LIST_INIT(lookup->my_server_list);
 731         debug("looking up %s", lookup->textname);
 732 }
 733
 734 static void
 735 do_next_command(char *input) {
 736         char *ptr, *arg;
 737
 738         ptr = next_token(&input, " \t\r\n");
 739         if (ptr == NULL)
 740                 return;
 741         arg = next_token(&input, " \t\r\n");
 742         if ((strcasecmp(ptr, "set") == 0) &&
 743             (arg != NULL))
 744                 setoption(arg);
 745         else if ((strcasecmp(ptr, "server") == 0) ||
 746                  (strcasecmp(ptr, "lserver") == 0)) {
 747                 isc_app_block();
 748                 set_nameserver(arg);
 749                 check_ra = ISC_FALSE;
 750                 isc_app_unblock();
 751                 show_settings(ISC_TRUE, ISC_TRUE);
 752         } else if (strcasecmp(ptr, "exit") == 0) {
 753                 in_use = ISC_FALSE;
 754         } else if (strcasecmp(ptr, "help") == 0 ||
 755                    strcasecmp(ptr, "?") == 0) {
 756                 printf("The '%s' command is not yet implemented.\n", ptr);
 757         } else if (strcasecmp(ptr, "finger") == 0 ||
 758                    strcasecmp(ptr, "root") == 0 ||
 759                    strcasecmp(ptr, "ls") == 0 ||
 760                    strcasecmp(ptr, "view") == 0) {
 761                 printf("The '%s' command is not implemented.\n", ptr);
 762         } else
 763                 addlookup(ptr);
 764 }
 765
 766 static void
 767 get_next_command(void) {
 768         char *buf;
 769         char *ptr;
 770
 771         fflush(stdout);
 772         buf = isc_mem_allocate(mctx, COMMSIZE);
 773         if (buf == NULL)
 774                 fatal("memory allocation failure");
 775         isc_app_block();
 776         if (interactive) {
 777 #ifdef HAVE_READLINE
 778                 ptr = readline("> ");
 779                 if (ptr != NULL)
 780                         add_history(ptr);
 781 #else
 782                 fputs("> ", stderr);
 783                 fflush(stderr);
 784                 ptr = fgets(buf, COMMSIZE, stdin);
 785 #endif
 786         } else
 787                 ptr = fgets(buf, COMMSIZE, stdin);
 788         isc_app_unblock();
 789         if (ptr == NULL) {
 790                 in_use = ISC_FALSE;
 791         } else
 792                 do_next_command(ptr);
 793 #ifdef HAVE_READLINE
 794         if (interactive)
 795                 free(ptr);
 796 #endif
 797         isc_mem_free(mctx, buf);
 798 }
 799
 800 static void
 801 parse_args(int argc, char **argv) {
 802         isc_boolean_t have_lookup = ISC_FALSE;
 803
 804         usesearch = ISC_TRUE;
 805         for (argc--, argv++; argc > 0; argc--, argv++) {
 806                 debug("main parsing %s", argv[0]);
 807                 if (argv[0][0] == '-') {
 808                         if (argv[0][1] != 0)
 809                                 setoption(&argv[0][1]);
 810                         else
 811                                 have_lookup = ISC_TRUE;
 812                 } else {
 813                         if (!have_lookup) {
 814                                 have_lookup = ISC_TRUE;
 815                                 in_use = ISC_TRUE;
 816                                 addlookup(argv[0]);
 817                         } else {
 818                                 set_nameserver(argv[0]);
 819                                 check_ra = ISC_FALSE;
 820                         }
 821                 }
 822         }
 823 }
 824
 825 static void
 826 flush_lookup_list(void) {
 827         dig_lookup_t *l, *lp;
 828         dig_query_t *q, *qp;
 829         dig_server_t *s, *sp;
 830
 831         lookup_counter = 0;
 832         l = ISC_LIST_HEAD(lookup_list);
 833         while (l != NULL) {
 834                 q = ISC_LIST_HEAD(l->q);
 835                 while (q != NULL) {
 836                         if (q->sock != NULL) {
 837                                 isc_socket_cancel(q->sock, NULL,
 838                                                   ISC_SOCKCANCEL_ALL);
 839                                 isc_socket_detach(&q->sock);
 840                         }
 841                         if (ISC_LINK_LINKED(&q->recvbuf, link))
 842                                 ISC_LIST_DEQUEUE(q->recvlist, &q->recvbuf,
 843                                                  link);
 844                         if (ISC_LINK_LINKED(&q->lengthbuf, link))
 845                                 ISC_LIST_DEQUEUE(q->lengthlist, &q->lengthbuf,
 846                                                  link);
 847                         isc_buffer_invalidate(&q->recvbuf);
 848                         isc_buffer_invalidate(&q->lengthbuf);
 849                         qp = q;
 850                         q = ISC_LIST_NEXT(q, link);
 851                         ISC_LIST_DEQUEUE(l->q, qp, link);
 852                         isc_mem_free(mctx, qp);
 853                 }
 854                 s = ISC_LIST_HEAD(l->my_server_list);
 855                 while (s != NULL) {
 856                         sp = s;
 857                         s = ISC_LIST_NEXT(s, link);
 858                         ISC_LIST_DEQUEUE(l->my_server_list, sp, link);
 859                         isc_mem_free(mctx, sp);
 860
 861                 }
 862                 if (l->sendmsg != NULL)
 863                         dns_message_destroy(&l->sendmsg);
 864                 if (l->timer != NULL)
 865                         isc_timer_detach(&l->timer);
 866                 lp = l;
 867                 l = ISC_LIST_NEXT(l, link);
 868                 ISC_LIST_DEQUEUE(lookup_list, lp, link);
 869                 isc_mem_free(mctx, lp);
 870         }
 871 }
 872
 873 static void
 874 getinput(isc_task_t *task, isc_event_t *event) {
 875         UNUSED(task);
 876         if (global_event == NULL)
 877                 global_event = event;
 878         while (in_use) {
 879                 get_next_command();
 880                 if (ISC_LIST_HEAD(lookup_list) != NULL) {
 881                         start_lookup();
 882                         return;
 883                 }
 884         }
 885         isc_app_shutdown();
 886 }
 887
 888 int
 889 main(int argc, char **argv) {
 890         isc_result_t result;
 891
 892         interactive = ISC_TF(isatty(0));
 893
 894         ISC_LIST_INIT(lookup_list);
 895         ISC_LIST_INIT(server_list);
 896         ISC_LIST_INIT(search_list);
 897
 898         check_ra = ISC_TRUE;
 899
 900         result = isc_app_start();
 901         check_result(result, "isc_app_start");
 902
 903         setup_libs();
 904         progname = argv[0];
 905
 906         parse_args(argc, argv);
 907
 908         setup_system();
 909         if (domainopt[0] != '\0')
 910                 set_search_domain(domainopt);
 911         if (in_use)
 912                 result = isc_app_onrun(mctx, global_task, onrun_callback,
 913                                        NULL);
 914         else
 915                 result = isc_app_onrun(mctx, global_task, getinput, NULL);
 916         check_result(result, "isc_app_onrun");
 917         in_use = ISC_TF(!in_use);
 918
 919         (void)isc_app_run();
 920
 921         puts("");
 922         debug("done, and starting to shut down");
 923         if (global_event != NULL)
 924                 isc_event_free(&global_event);
 925         cancel_all();
 926         destroy_libs();
 927         isc_app_finish();
 928
 929         return (query_error | print_error);
 930 }