contrib/bind9/bin/dig/nslookup.c

   1 /*
   2  * Copyright (C) 2004-2007, 2009  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 2000-2003  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  10  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  11  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  12  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  13  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  14  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  15  * PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 /* $Id: nslookup.c,v 1.117.334.5 2009/10/20 01:11:22 marka Exp $ */
  19
  20 #include <config.h>
  21
  22 #include <stdlib.h>
  23
  24 #include <isc/app.h>
  25 #include <isc/buffer.h>
  26 #include <isc/commandline.h>
  27 #include <isc/event.h>
  28 #include <isc/parseint.h>
  29 #include <isc/print.h>
  30 #include <isc/string.h>
  31 #include <isc/timer.h>
  32 #include <isc/util.h>
  33 #include <isc/task.h>
  34 #include <isc/netaddr.h>
  35
  36 #include <dns/message.h>
  37 #include <dns/name.h>
  38 #include <dns/fixedname.h>
  39 #include <dns/rdata.h>
  40 #include <dns/rdataclass.h>
  41 #include <dns/rdataset.h>
  42 #include <dns/rdatastruct.h>
  43 #include <dns/rdatatype.h>
  44 #include <dns/byaddr.h>
  45
  46 #include <dig/dig.h>
  47
  48 static isc_boolean_t short_form = ISC_TRUE,
  49         tcpmode = ISC_FALSE,
  50         identify = ISC_FALSE, stats = ISC_TRUE,
  51         comments = ISC_TRUE, section_question = ISC_TRUE,
  52         section_answer = ISC_TRUE, section_authority = ISC_TRUE,
  53         section_additional = ISC_TRUE, recurse = ISC_TRUE,
  54         aaonly = ISC_FALSE, nofail = ISC_TRUE;
  55
  56 static isc_boolean_t in_use = ISC_FALSE;
  57 static char defclass[MXRD] = "IN";
  58 static char deftype[MXRD] = "A";
  59 static isc_event_t *global_event = NULL;
  60
  61 static char domainopt[DNS_NAME_MAXTEXT];
  62
  63 static const char *rcodetext[] = {
  64         "NOERROR",
  65         "FORMERR",
  66         "SERVFAIL",
  67         "NXDOMAIN",
  68         "NOTIMP",
  69         "REFUSED",
  70         "YXDOMAIN",
  71         "YXRRSET",
  72         "NXRRSET",
  73         "NOTAUTH",
  74         "NOTZONE",
  75         "RESERVED11",
  76         "RESERVED12",
  77         "RESERVED13",
  78         "RESERVED14",
  79         "RESERVED15",
  80         "BADVERS"
  81 };
  82
  83 static const char *rtypetext[] = {
  84         "rtype_0 = ",                   /* 0 */
  85         "internet address = ",          /* 1 */
  86         "nameserver = ",                /* 2 */
  87         "md = ",                        /* 3 */
  88         "mf = ",                        /* 4 */
  89         "canonical name = ",            /* 5 */
  90         "soa = ",                       /* 6 */
  91         "mb = ",                        /* 7 */
  92         "mg = ",                        /* 8 */
  93         "mr = ",                        /* 9 */
  94         "rtype_10 = ",                  /* 10 */
  95         "protocol = ",                  /* 11 */
  96         "name = ",                      /* 12 */
  97         "hinfo = ",                     /* 13 */
  98         "minfo = ",                     /* 14 */
  99         "mail exchanger = ",            /* 15 */
 100         "text = ",                      /* 16 */
 101         "rp = ",                        /* 17 */
 102         "afsdb = ",                     /* 18 */
 103         "x25 address = ",               /* 19 */
 104         "isdn address = ",              /* 20 */
 105         "rt = ",                        /* 21 */
 106         "nsap = ",                      /* 22 */
 107         "nsap_ptr = ",                  /* 23 */
 108         "signature = ",                 /* 24 */
 109         "key = ",                       /* 25 */
 110         "px = ",                        /* 26 */
 111         "gpos = ",                      /* 27 */
 112         "has AAAA address ",            /* 28 */
 113         "loc = ",                       /* 29 */
 114         "next = ",                      /* 30 */
 115         "rtype_31 = ",                  /* 31 */
 116         "rtype_32 = ",                  /* 32 */
 117         "service = ",                   /* 33 */
 118         "rtype_34 = ",                  /* 34 */
 119         "naptr = ",                     /* 35 */
 120         "kx = ",                        /* 36 */
 121         "cert = ",                      /* 37 */
 122         "v6 address = ",                /* 38 */
 123         "dname = ",                     /* 39 */
 124         "rtype_40 = ",                  /* 40 */
 125         "optional = "                   /* 41 */
 126 };
 127
 128 #define N_KNOWN_RRTYPES (sizeof(rtypetext) / sizeof(rtypetext[0]))
 129
 130 static void flush_lookup_list(void);
 131 static void getinput(isc_task_t *task, isc_event_t *event);
 132
 133 static char *
 134 rcode_totext(dns_rcode_t rcode)
 135 {
 136         static char buf[sizeof("?65535")];
 137         union {
 138                 const char *consttext;
 139                 char *deconsttext;
 140         } totext;
 141
 142         if (rcode >= (sizeof(rcodetext)/sizeof(rcodetext[0]))) {
 143                 snprintf(buf, sizeof(buf), "?%u", rcode);
 144                 totext.deconsttext = buf;
 145         } else
 146                 totext.consttext = rcodetext[rcode];
 147         return totext.deconsttext;
 148 }
 149
 150 void
 151 dighost_shutdown(void) {
 152         isc_event_t *event = global_event;
 153
 154         flush_lookup_list();
 155         debug("dighost_shutdown()");
 156
 157         if (!in_use) {
 158                 isc_app_shutdown();
 159                 return;
 160         }
 161
 162         isc_task_send(global_task, &event);
 163 }
 164
 165 static void
 166 printsoa(dns_rdata_t *rdata) {
 167         dns_rdata_soa_t soa;
 168         isc_result_t result;
 169         char namebuf[DNS_NAME_FORMATSIZE];
 170
 171         result = dns_rdata_tostruct(rdata, &soa, NULL);
 172         check_result(result, "dns_rdata_tostruct");
 173
 174         dns_name_format(&soa.origin, namebuf, sizeof(namebuf));
 175         printf("\torigin = %s\n", namebuf);
 176         dns_name_format(&soa.contact, namebuf, sizeof(namebuf));
 177         printf("\tmail addr = %s\n", namebuf);
 178         printf("\tserial = %u\n", soa.serial);
 179         printf("\trefresh = %u\n", soa.refresh);
 180         printf("\tretry = %u\n", soa.retry);
 181         printf("\texpire = %u\n", soa.expire);
 182         printf("\tminimum = %u\n", soa.minimum);
 183         dns_rdata_freestruct(&soa);
 184 }
 185
 186 static void
 187 printa(dns_rdata_t *rdata) {
 188         isc_result_t result;
 189         char text[sizeof("255.255.255.255")];
 190         isc_buffer_t b;
 191
 192         isc_buffer_init(&b, text, sizeof(text));
 193         result = dns_rdata_totext(rdata, NULL, &b);
 194         check_result(result, "dns_rdata_totext");
 195         printf("Address: %.*s\n", (int)isc_buffer_usedlength(&b),
 196                (char *)isc_buffer_base(&b));
 197 }
 198 #ifdef DIG_SIGCHASE
 199 /* Just for compatibility : not use in host program */
 200 isc_result_t
 201 printrdataset(dns_name_t *owner_name, dns_rdataset_t *rdataset,
 202               isc_buffer_t *target)
 203 {
 204         UNUSED(owner_name);
 205         UNUSED(rdataset);
 206         UNUSED(target);
 207         return(ISC_FALSE);
 208 }
 209 #endif
 210 static void
 211 printrdata(dns_rdata_t *rdata) {
 212         isc_result_t result;
 213         isc_buffer_t *b = NULL;
 214         unsigned int size = 1024;
 215         isc_boolean_t done = ISC_FALSE;
 216
 217         if (rdata->type < N_KNOWN_RRTYPES)
 218                 printf("%s", rtypetext[rdata->type]);
 219         else
 220                 printf("rdata_%d = ", rdata->type);
 221
 222         while (!done) {
 223                 result = isc_buffer_allocate(mctx, &b, size);
 224                 if (result != ISC_R_SUCCESS)
 225                         check_result(result, "isc_buffer_allocate");
 226                 result = dns_rdata_totext(rdata, NULL, b);
 227                 if (result == ISC_R_SUCCESS) {
 228                         printf("%.*s\n", (int)isc_buffer_usedlength(b),
 229                                (char *)isc_buffer_base(b));
 230                         done = ISC_TRUE;
 231                 } else if (result != ISC_R_NOSPACE)
 232                         check_result(result, "dns_rdata_totext");
 233                 isc_buffer_free(&b);
 234                 size *= 2;
 235         }
 236 }
 237
 238 static isc_result_t
 239 printsection(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers,
 240              dns_section_t section) {
 241         isc_result_t result, loopresult;
 242         dns_name_t *name;
 243         dns_rdataset_t *rdataset = NULL;
 244         dns_rdata_t rdata = DNS_RDATA_INIT;
 245         char namebuf[DNS_NAME_FORMATSIZE];
 246
 247         UNUSED(query);
 248         UNUSED(headers);
 249
 250         debug("printsection()");
 251
 252         result = dns_message_firstname(msg, section);
 253         if (result == ISC_R_NOMORE)
 254                 return (ISC_R_SUCCESS);
 255         else if (result != ISC_R_SUCCESS)
 256                 return (result);
 257         for (;;) {
 258                 name = NULL;
 259                 dns_message_currentname(msg, section,
 260                                         &name);
 261                 for (rdataset = ISC_LIST_HEAD(name->list);
 262                      rdataset != NULL;
 263                      rdataset = ISC_LIST_NEXT(rdataset, link)) {
 264                         loopresult = dns_rdataset_first(rdataset);
 265                         while (loopresult == ISC_R_SUCCESS) {
 266                                 dns_rdataset_current(rdataset, &rdata);
 267                                 switch (rdata.type) {
 268                                 case dns_rdatatype_a:
 269                                         if (section != DNS_SECTION_ANSWER)
 270                                                 goto def_short_section;
 271                                         dns_name_format(name, namebuf,
 272                                                         sizeof(namebuf));
 273                                         printf("Name:\t%s\n", namebuf);
 274                                         printa(&rdata);
 275                                         break;
 276                                 case dns_rdatatype_soa:
 277                                         dns_name_format(name, namebuf,
 278                                                         sizeof(namebuf));
 279                                         printf("%s\n", namebuf);
 280                                         printsoa(&rdata);
 281                                         break;
 282                                 default:
 283                                 def_short_section:
 284                                         dns_name_format(name, namebuf,
 285                                                         sizeof(namebuf));
 286                                         printf("%s\t", namebuf);
 287                                         printrdata(&rdata);
 288                                         break;
 289                                 }
 290                                 dns_rdata_reset(&rdata);
 291                                 loopresult = dns_rdataset_next(rdataset);
 292                         }
 293                 }
 294                 result = dns_message_nextname(msg, section);
 295                 if (result == ISC_R_NOMORE)
 296                         break;
 297                 else if (result != ISC_R_SUCCESS) {
 298                         return (result);
 299                 }
 300         }
 301         return (ISC_R_SUCCESS);
 302 }
 303
 304 static isc_result_t
 305 detailsection(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers,
 306              dns_section_t section) {
 307         isc_result_t result, loopresult;
 308         dns_name_t *name;
 309         dns_rdataset_t *rdataset = NULL;
 310         dns_rdata_t rdata = DNS_RDATA_INIT;
 311         char namebuf[DNS_NAME_FORMATSIZE];
 312
 313         UNUSED(query);
 314
 315         debug("detailsection()");
 316
 317         if (headers) {
 318                 switch (section) {
 319                 case DNS_SECTION_QUESTION:
 320                         puts("    QUESTIONS:");
 321                         break;
 322                 case DNS_SECTION_ANSWER:
 323                         puts("    ANSWERS:");
 324                         break;
 325                 case DNS_SECTION_AUTHORITY:
 326                         puts("    AUTHORITY RECORDS:");
 327                         break;
 328                 case DNS_SECTION_ADDITIONAL:
 329                         puts("    ADDITIONAL RECORDS:");
 330                         break;
 331                 }
 332         }
 333
 334         result = dns_message_firstname(msg, section);
 335         if (result == ISC_R_NOMORE)
 336                 return (ISC_R_SUCCESS);
 337         else if (result != ISC_R_SUCCESS)
 338                 return (result);
 339         for (;;) {
 340                 name = NULL;
 341                 dns_message_currentname(msg, section,
 342                                         &name);
 343                 for (rdataset = ISC_LIST_HEAD(name->list);
 344                      rdataset != NULL;
 345                      rdataset = ISC_LIST_NEXT(rdataset, link)) {
 346                         if (section == DNS_SECTION_QUESTION) {
 347                                 dns_name_format(name, namebuf,
 348                                                 sizeof(namebuf));
 349                                 printf("\t%s, ", namebuf);
 350                                 dns_rdatatype_format(rdataset->type,
 351                                                      namebuf,
 352                                                      sizeof(namebuf));
 353                                 printf("type = %s, ", namebuf);
 354                                 dns_rdataclass_format(rdataset->rdclass,
 355                                                       namebuf,
 356                                                       sizeof(namebuf));
 357                                 printf("class = %s\n", namebuf);
 358                         }
 359                         loopresult = dns_rdataset_first(rdataset);
 360                         while (loopresult == ISC_R_SUCCESS) {
 361                                 dns_rdataset_current(rdataset, &rdata);
 362
 363                                 dns_name_format(name, namebuf,
 364                                                 sizeof(namebuf));
 365                                 printf("    ->  %s\n", namebuf);
 366
 367                                 switch (rdata.type) {
 368                                 case dns_rdatatype_soa:
 369                                         printsoa(&rdata);
 370                                         break;
 371                                 default:
 372                                         printf("\t");
 373                                         printrdata(&rdata);
 374                                 }
 375                                 dns_rdata_reset(&rdata);
 376                                 printf("\tttl = %u\n", rdataset->ttl);
 377                                 loopresult = dns_rdataset_next(rdataset);
 378                         }
 379                 }
 380                 result = dns_message_nextname(msg, section);
 381                 if (result == ISC_R_NOMORE)
 382                         break;
 383                 else if (result != ISC_R_SUCCESS) {
 384                         return (result);
 385                 }
 386         }
 387         return (ISC_R_SUCCESS);
 388 }
 389
 390 void
 391 received(int bytes, isc_sockaddr_t *from, dig_query_t *query)
 392 {
 393         UNUSED(bytes);
 394         UNUSED(from);
 395         UNUSED(query);
 396 }
 397
 398 void
 399 trying(char *frm, dig_lookup_t *lookup) {
 400         UNUSED(frm);
 401         UNUSED(lookup);
 402
 403 }
 404
 405 isc_result_t
 406 printmessage(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers) {
 407         char servtext[ISC_SOCKADDR_FORMATSIZE];
 408
 409         debug("printmessage()");
 410
 411         isc_sockaddr_format(&query->sockaddr, servtext, sizeof(servtext));
 412         printf("Server:\t\t%s\n", query->userarg);
 413         printf("Address:\t%s\n", servtext);
 414
 415         puts("");
 416
 417         if (!short_form) {
 418                 isc_boolean_t headers = ISC_TRUE;
 419                 puts("------------");
 420                 /*              detailheader(query, msg);*/
 421                 detailsection(query, msg, headers, DNS_SECTION_QUESTION);
 422                 detailsection(query, msg, headers, DNS_SECTION_ANSWER);
 423                 detailsection(query, msg, headers, DNS_SECTION_AUTHORITY);
 424                 detailsection(query, msg, headers, DNS_SECTION_ADDITIONAL);
 425                 puts("------------");
 426         }
 427
 428         if (msg->rcode != 0) {
 429                 char nametext[DNS_NAME_FORMATSIZE];
 430                 dns_name_format(query->lookup->name,
 431                                 nametext, sizeof(nametext));
 432                 printf("** server can't find %s: %s\n",
 433                        (msg->rcode != dns_rcode_nxdomain) ? nametext :
 434                        query->lookup->textname, rcode_totext(msg->rcode));
 435                 debug("returning with rcode == 0");
 436                 return (ISC_R_SUCCESS);
 437         }
 438
 439         if ((msg->flags & DNS_MESSAGEFLAG_AA) == 0)
 440                 puts("Non-authoritative answer:");
 441         if (!ISC_LIST_EMPTY(msg->sections[DNS_SECTION_ANSWER]))
 442                 printsection(query, msg, headers, DNS_SECTION_ANSWER);
 443         else
 444                 printf("*** Can't find %s: No answer\n",
 445                        query->lookup->textname);
 446
 447         if (((msg->flags & DNS_MESSAGEFLAG_AA) == 0) &&
 448             (query->lookup->rdtype != dns_rdatatype_a)) {
 449                 puts("\nAuthoritative answers can be found from:");
 450                 printsection(query, msg, headers,
 451                              DNS_SECTION_AUTHORITY);
 452                 printsection(query, msg, headers,
 453                              DNS_SECTION_ADDITIONAL);
 454         }
 455         return (ISC_R_SUCCESS);
 456 }
 457
 458 static void
 459 show_settings(isc_boolean_t full, isc_boolean_t serv_only) {
 460         dig_server_t *srv;
 461         isc_sockaddr_t sockaddr;
 462         dig_searchlist_t *listent;
 463         isc_result_t result;
 464
 465         srv = ISC_LIST_HEAD(server_list);
 466
 467         while (srv != NULL) {
 468                 char sockstr[ISC_SOCKADDR_FORMATSIZE];
 469
 470                 result = get_address(srv->servername, port, &sockaddr);
 471                 check_result(result, "get_address");
 472
 473                 isc_sockaddr_format(&sockaddr, sockstr, sizeof(sockstr));
 474                 printf("Default server: %s\nAddress: %s\n",
 475                         srv->userarg, sockstr);
 476                 if (!full)
 477                         return;
 478                 srv = ISC_LIST_NEXT(srv, link);
 479         }
 480         if (serv_only)
 481                 return;
 482         printf("\nSet options:\n");
 483         printf("  %s\t\t\t%s\t\t%s\n",
 484                tcpmode ? "vc" : "novc",
 485                short_form ? "nodebug" : "debug",
 486                debugging ? "d2" : "nod2");
 487         printf("  %s\t\t%s\n",
 488                usesearch ? "search" : "nosearch",
 489                recurse ? "recurse" : "norecurse");
 490         printf("  timeout = %d\t\tretry = %d\tport = %d\n",
 491                timeout, tries, port);
 492         printf("  querytype = %-8s\tclass = %s\n", deftype, defclass);
 493         printf("  srchlist = ");
 494         for (listent = ISC_LIST_HEAD(search_list);
 495              listent != NULL;
 496              listent = ISC_LIST_NEXT(listent, link)) {
 497                      printf("%s", listent->origin);
 498                      if (ISC_LIST_NEXT(listent, link) != NULL)
 499                              printf("/");
 500         }
 501         printf("\n");
 502 }
 503
 504 static isc_boolean_t
 505 testtype(char *typetext) {
 506         isc_result_t result;
 507         isc_textregion_t tr;
 508         dns_rdatatype_t rdtype;
 509
 510         tr.base = typetext;
 511         tr.length = strlen(typetext);
 512         result = dns_rdatatype_fromtext(&rdtype, &tr);
 513         if (result == ISC_R_SUCCESS)
 514                 return (ISC_TRUE);
 515         else {
 516                 printf("unknown query type: %s\n", typetext);
 517                 return (ISC_FALSE);
 518         }
 519 }
 520
 521 static isc_boolean_t
 522 testclass(char *typetext) {
 523         isc_result_t result;
 524         isc_textregion_t tr;
 525         dns_rdataclass_t rdclass;
 526
 527         tr.base = typetext;
 528         tr.length = strlen(typetext);
 529         result = dns_rdataclass_fromtext(&rdclass, &tr);
 530         if (result == ISC_R_SUCCESS)
 531                 return (ISC_TRUE);
 532         else {
 533                 printf("unknown query class: %s\n", typetext);
 534                 return (ISC_FALSE);
 535         }
 536 }
 537
 538 static void
 539 safecpy(char *dest, char *src, int size) {
 540         strncpy(dest, src, size);
 541         dest[size-1] = 0;
 542 }
 543
 544 static isc_result_t
 545 parse_uint(isc_uint32_t *uip, const char *value, isc_uint32_t max,
 546            const char *desc) {
 547         isc_uint32_t n;
 548         isc_result_t result = isc_parse_uint32(&n, value, 10);
 549         if (result == ISC_R_SUCCESS && n > max)
 550                 result = ISC_R_RANGE;
 551         if (result != ISC_R_SUCCESS) {
 552                 printf("invalid %s '%s': %s\n", desc,
 553                        value, isc_result_totext(result));
 554                 return result;
 555         }
 556         *uip = n;
 557         return (ISC_R_SUCCESS);
 558 }
 559
 560 static void
 561 set_port(const char *value) {
 562         isc_uint32_t n;
 563         isc_result_t result = parse_uint(&n, value, 65535, "port");
 564         if (result == ISC_R_SUCCESS)
 565                 port = (isc_uint16_t) n;
 566 }
 567
 568 static void
 569 set_timeout(const char *value) {
 570         isc_uint32_t n;
 571         isc_result_t result = parse_uint(&n, value, UINT_MAX, "timeout");
 572         if (result == ISC_R_SUCCESS)
 573                 timeout = n;
 574 }
 575
 576 static void
 577 set_tries(const char *value) {
 578         isc_uint32_t n;
 579         isc_result_t result = parse_uint(&n, value, INT_MAX, "tries");
 580         if (result == ISC_R_SUCCESS)
 581                 tries = 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                         safecpy(defclass, &opt[6], sizeof(defclass));
 591         } else if (strncasecmp(opt, "cl=", 3) == 0) {
 592                 if (testclass(&opt[3]))
 593                         safecpy(defclass, &opt[3], sizeof(defclass));
 594         } else if (strncasecmp(opt, "type=", 5) == 0) {
 595                 if (testtype(&opt[5]))
 596                         safecpy(deftype, &opt[5], sizeof(deftype));
 597         } else if (strncasecmp(opt, "ty=", 3) == 0) {
 598                 if (testtype(&opt[3]))
 599                         safecpy(deftype, &opt[3], sizeof(deftype));
 600         } else if (strncasecmp(opt, "querytype=", 10) == 0) {
 601                 if (testtype(&opt[10]))
 602                         safecpy(deftype, &opt[10], sizeof(deftype));
 603         } else if (strncasecmp(opt, "query=", 6) == 0) {
 604                 if (testtype(&opt[6]))
 605                         safecpy(deftype, &opt[6], sizeof(deftype));
 606         } else if (strncasecmp(opt, "qu=", 3) == 0) {
 607                 if (testtype(&opt[3]))
 608                         safecpy(deftype, &opt[3], sizeof(deftype));
 609         } else if (strncasecmp(opt, "q=", 2) == 0) {
 610                 if (testtype(&opt[2]))
 611                         safecpy(deftype, &opt[2], sizeof(deftype));
 612         } else if (strncasecmp(opt, "domain=", 7) == 0) {
 613                 safecpy(domainopt, &opt[7], sizeof(domainopt));
 614                 set_search_domain(domainopt);
 615                 usesearch = ISC_TRUE;
 616         } else if (strncasecmp(opt, "do=", 3) == 0) {
 617                 safecpy(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 {
 665                 printf("*** Invalid option: %s\n", opt);
 666         }
 667 }
 668
 669 static void
 670 addlookup(char *opt) {
 671         dig_lookup_t *lookup;
 672         isc_result_t result;
 673         isc_textregion_t tr;
 674         dns_rdatatype_t rdtype;
 675         dns_rdataclass_t rdclass;
 676         char store[MXNAME];
 677
 678         debug("addlookup()");
 679         tr.base = deftype;
 680         tr.length = strlen(deftype);
 681         result = dns_rdatatype_fromtext(&rdtype, &tr);
 682         if (result != ISC_R_SUCCESS) {
 683                 printf("unknown query type: %s\n", deftype);
 684                 rdclass = dns_rdatatype_a;
 685         }
 686         tr.base = defclass;
 687         tr.length = strlen(defclass);
 688         result = dns_rdataclass_fromtext(&rdclass, &tr);
 689         if (result != ISC_R_SUCCESS) {
 690                 printf("unknown query class: %s\n", defclass);
 691                 rdclass = dns_rdataclass_in;
 692         }
 693         lookup = make_empty_lookup();
 694         if (get_reverse(store, sizeof(store), opt, lookup->ip6_int, ISC_TRUE)
 695             == ISC_R_SUCCESS) {
 696                 safecpy(lookup->textname, store, sizeof(lookup->textname));
 697                 lookup->rdtype = dns_rdatatype_ptr;
 698                 lookup->rdtypeset = ISC_TRUE;
 699         } else {
 700                 safecpy(lookup->textname, opt, sizeof(lookup->textname));
 701                 lookup->rdtype = rdtype;
 702                 lookup->rdtypeset = ISC_TRUE;
 703         }
 704         lookup->rdclass = rdclass;
 705         lookup->rdclassset = ISC_TRUE;
 706         lookup->trace = ISC_FALSE;
 707         lookup->trace_root = lookup->trace;
 708         lookup->ns_search_only = ISC_FALSE;
 709         lookup->identify = identify;
 710         lookup->recurse = recurse;
 711         lookup->aaonly = aaonly;
 712         lookup->retries = tries;
 713         lookup->udpsize = 0;
 714         lookup->comments = comments;
 715         lookup->tcp_mode = tcpmode;
 716         lookup->stats = stats;
 717         lookup->section_question = section_question;
 718         lookup->section_answer = section_answer;
 719         lookup->section_authority = section_authority;
 720         lookup->section_additional = section_additional;
 721         lookup->new_search = ISC_TRUE;
 722         if (nofail)
 723                 lookup->servfail_stops = ISC_FALSE;
 724         ISC_LIST_INIT(lookup->q);
 725         ISC_LINK_INIT(lookup, link);
 726         ISC_LIST_APPEND(lookup_list, lookup, link);
 727         lookup->origin = NULL;
 728         ISC_LIST_INIT(lookup->my_server_list);
 729         debug("looking up %s", lookup->textname);
 730 }
 731
 732 static void
 733 get_next_command(void) {
 734         char *buf;
 735         char *ptr, *arg;
 736         char *input;
 737
 738         fflush(stdout);
 739         buf = isc_mem_allocate(mctx, COMMSIZE);
 740         if (buf == NULL)
 741                 fatal("memory allocation failure");
 742         fputs("> ", stderr);
 743         fflush(stderr);
 744         isc_app_block();
 745         ptr = fgets(buf, COMMSIZE, stdin);
 746         isc_app_unblock();
 747         if (ptr == NULL) {
 748                 in_use = ISC_FALSE;
 749                 goto cleanup;
 750         }
 751         input = buf;
 752         ptr = next_token(&input, " \t\r\n");
 753         if (ptr == NULL)
 754                 goto cleanup;
 755         arg = next_token(&input, " \t\r\n");
 756         if ((strcasecmp(ptr, "set") == 0) &&
 757             (arg != NULL))
 758                 setoption(arg);
 759         else if ((strcasecmp(ptr, "server") == 0) ||
 760                  (strcasecmp(ptr, "lserver") == 0)) {
 761                 isc_app_block();
 762                 set_nameserver(arg);
 763                 check_ra = ISC_FALSE;
 764                 isc_app_unblock();
 765                 show_settings(ISC_TRUE, ISC_TRUE);
 766         } else if (strcasecmp(ptr, "exit") == 0) {
 767                 in_use = ISC_FALSE;
 768                 goto cleanup;
 769         } else if (strcasecmp(ptr, "help") == 0 ||
 770                    strcasecmp(ptr, "?") == 0) {
 771                 printf("The '%s' command is not yet implemented.\n", ptr);
 772                 goto cleanup;
 773         } else if (strcasecmp(ptr, "finger") == 0 ||
 774                    strcasecmp(ptr, "root") == 0 ||
 775                    strcasecmp(ptr, "ls") == 0 ||
 776                    strcasecmp(ptr, "view") == 0) {
 777                 printf("The '%s' command is not implemented.\n", ptr);
 778                 goto cleanup;
 779         } else
 780                 addlookup(ptr);
 781  cleanup:
 782         isc_mem_free(mctx, buf);
 783 }
 784
 785 static void
 786 parse_args(int argc, char **argv) {
 787         isc_boolean_t have_lookup = ISC_FALSE;
 788
 789         usesearch = ISC_TRUE;
 790         for (argc--, argv++; argc > 0; argc--, argv++) {
 791                 debug("main parsing %s", argv[0]);
 792                 if (argv[0][0] == '-') {
 793                         if (argv[0][1] != 0)
 794                                 setoption(&argv[0][1]);
 795                         else
 796                                 have_lookup = ISC_TRUE;
 797                 } else {
 798                         if (!have_lookup) {
 799                                 have_lookup = ISC_TRUE;
 800                                 in_use = ISC_TRUE;
 801                                 addlookup(argv[0]);
 802                         } else {
 803                                 set_nameserver(argv[0]);
 804                                 check_ra = ISC_FALSE;
 805                         }
 806                 }
 807         }
 808 }
 809
 810 static void
 811 flush_lookup_list(void) {
 812         dig_lookup_t *l, *lp;
 813         dig_query_t *q, *qp;
 814         dig_server_t *s, *sp;
 815
 816         lookup_counter = 0;
 817         l = ISC_LIST_HEAD(lookup_list);
 818         while (l != NULL) {
 819                 q = ISC_LIST_HEAD(l->q);
 820                 while (q != NULL) {
 821                         if (q->sock != NULL) {
 822                                 isc_socket_cancel(q->sock, NULL,
 823                                                   ISC_SOCKCANCEL_ALL);
 824                                 isc_socket_detach(&q->sock);
 825                         }
 826                         if (ISC_LINK_LINKED(&q->recvbuf, link))
 827                                 ISC_LIST_DEQUEUE(q->recvlist, &q->recvbuf,
 828                                                  link);
 829                         if (ISC_LINK_LINKED(&q->lengthbuf, link))
 830                                 ISC_LIST_DEQUEUE(q->lengthlist, &q->lengthbuf,
 831                                                  link);
 832                         isc_buffer_invalidate(&q->recvbuf);
 833                         isc_buffer_invalidate(&q->lengthbuf);
 834                         qp = q;
 835                         q = ISC_LIST_NEXT(q, link);
 836                         ISC_LIST_DEQUEUE(l->q, qp, link);
 837                         isc_mem_free(mctx, qp);
 838                 }
 839                 s = ISC_LIST_HEAD(l->my_server_list);
 840                 while (s != NULL) {
 841                         sp = s;
 842                         s = ISC_LIST_NEXT(s, link);
 843                         ISC_LIST_DEQUEUE(l->my_server_list, sp, link);
 844                         isc_mem_free(mctx, sp);
 845
 846                 }
 847                 if (l->sendmsg != NULL)
 848                         dns_message_destroy(&l->sendmsg);
 849                 if (l->timer != NULL)
 850                         isc_timer_detach(&l->timer);
 851                 lp = l;
 852                 l = ISC_LIST_NEXT(l, link);
 853                 ISC_LIST_DEQUEUE(lookup_list, lp, link);
 854                 isc_mem_free(mctx, lp);
 855         }
 856 }
 857
 858 static void
 859 getinput(isc_task_t *task, isc_event_t *event) {
 860         UNUSED(task);
 861         if (global_event == NULL)
 862                 global_event = event;
 863         while (in_use) {
 864                 get_next_command();
 865                 if (ISC_LIST_HEAD(lookup_list) != NULL) {
 866                         start_lookup();
 867                         return;
 868                 }
 869         }
 870         isc_app_shutdown();
 871 }
 872
 873 int
 874 main(int argc, char **argv) {
 875         isc_result_t result;
 876
 877         ISC_LIST_INIT(lookup_list);
 878         ISC_LIST_INIT(server_list);
 879         ISC_LIST_INIT(search_list);
 880
 881         check_ra = ISC_TRUE;
 882
 883         result = isc_app_start();
 884         check_result(result, "isc_app_start");
 885
 886         setup_libs();
 887         progname = argv[0];
 888
 889         parse_args(argc, argv);
 890
 891         setup_system();
 892         if (domainopt[0] != '\0')
 893                 set_search_domain(domainopt);
 894         if (in_use)
 895                 result = isc_app_onrun(mctx, global_task, onrun_callback,
 896                                        NULL);
 897         else
 898                 result = isc_app_onrun(mctx, global_task, getinput, NULL);
 899         check_result(result, "isc_app_onrun");
 900         in_use = ISC_TF(!in_use);
 901
 902         (void)isc_app_run();
 903
 904         puts("");
 905         debug("done, and starting to shut down");
 906         if (global_event != NULL)
 907                 isc_event_free(&global_event);
 908         cancel_all();
 909         destroy_libs();
 910         isc_app_finish();
 911
 912         return (0);
 913 }