contrib/bind9/bin/dig/nslookup.c

   1 /*
   2  * Copyright (C) 2004-2007  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 1.101.18.15 2007/08/28 07:19:55 tbox 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/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 static isc_boolean_t short_form = ISC_TRUE,
  48         tcpmode = ISC_FALSE,
  49         identify = ISC_FALSE, stats = ISC_TRUE,
  50         comments = ISC_TRUE, section_question = ISC_TRUE,
  51         section_answer = ISC_TRUE, section_authority = ISC_TRUE,
  52         section_additional = ISC_TRUE, recurse = ISC_TRUE,
  53         aaonly = ISC_FALSE, nofail = ISC_TRUE;
  54
  55 static isc_boolean_t in_use = ISC_FALSE;
  56 static char defclass[MXRD] = "IN";
  57 static char deftype[MXRD] = "A";
  58 static isc_event_t *global_event = NULL;
  59
  60 static char domainopt[DNS_NAME_MAXTEXT];
  61
  62 static const char *rcodetext[] = {
  63         "NOERROR",
  64         "FORMERR",
  65         "SERVFAIL",
  66         "NXDOMAIN",
  67         "NOTIMP",
  68         "REFUSED",
  69         "YXDOMAIN",
  70         "YXRRSET",
  71         "NXRRSET",
  72         "NOTAUTH",
  73         "NOTZONE",
  74         "RESERVED11",
  75         "RESERVED12",
  76         "RESERVED13",
  77         "RESERVED14",
  78         "RESERVED15",
  79         "BADVERS"
  80 };
  81
  82 static const char *rtypetext[] = {
  83         "rtype_0 = ",                   /* 0 */
  84         "internet address = ",          /* 1 */
  85         "nameserver = ",                /* 2 */
  86         "md = ",                        /* 3 */
  87         "mf = ",                        /* 4 */
  88         "canonical name = ",            /* 5 */
  89         "soa = ",                       /* 6 */
  90         "mb = ",                        /* 7 */
  91         "mg = ",                        /* 8 */
  92         "mr = ",                        /* 9 */
  93         "rtype_10 = ",                  /* 10 */
  94         "protocol = ",                  /* 11 */
  95         "name = ",                      /* 12 */
  96         "hinfo = ",                     /* 13 */
  97         "minfo = ",                     /* 14 */
  98         "mail exchanger = ",            /* 15 */
  99         "text = ",                      /* 16 */
 100         "rp = ",                        /* 17 */
 101         "afsdb = ",                     /* 18 */
 102         "x25 address = ",               /* 19 */
 103         "isdn address = ",              /* 20 */
 104         "rt = ",                        /* 21 */
 105         "nsap = ",                      /* 22 */
 106         "nsap_ptr = ",                  /* 23 */
 107         "signature = ",                 /* 24 */
 108         "key = ",                       /* 25 */
 109         "px = ",                        /* 26 */
 110         "gpos = ",                      /* 27 */
 111         "has AAAA address ",            /* 28 */
 112         "loc = ",                       /* 29 */
 113         "next = ",                      /* 30 */
 114         "rtype_31 = ",                  /* 31 */
 115         "rtype_32 = ",                  /* 32 */
 116         "service = ",                   /* 33 */
 117         "rtype_34 = ",                  /* 34 */
 118         "naptr = ",                     /* 35 */
 119         "kx = ",                        /* 36 */
 120         "cert = ",                      /* 37 */
 121         "v6 address = ",                /* 38 */
 122         "dname = ",                     /* 39 */
 123         "rtype_40 = ",                  /* 40 */
 124         "optional = "                   /* 41 */
 125 };
 126
 127 #define N_KNOWN_RRTYPES (sizeof(rtypetext) / sizeof(rtypetext[0]))
 128
 129 static void flush_lookup_list(void);
 130 static void getinput(isc_task_t *task, isc_event_t *event);
 131
 132 void
 133 dighost_shutdown(void) {
 134         isc_event_t *event = global_event;
 135
 136         flush_lookup_list();
 137         debug("dighost_shutdown()");
 138
 139         if (!in_use) {
 140                 isc_app_shutdown();
 141                 return;
 142         }
 143
 144         isc_task_send(global_task, &event);
 145 }
 146
 147 static void
 148 printsoa(dns_rdata_t *rdata) {
 149         dns_rdata_soa_t soa;
 150         isc_result_t result;
 151         char namebuf[DNS_NAME_FORMATSIZE];
 152
 153         result = dns_rdata_tostruct(rdata, &soa, NULL);
 154         check_result(result, "dns_rdata_tostruct");
 155
 156         dns_name_format(&soa.origin, namebuf, sizeof(namebuf));
 157         printf("\torigin = %s\n", namebuf);
 158         dns_name_format(&soa.contact, namebuf, sizeof(namebuf));
 159         printf("\tmail addr = %s\n", namebuf);
 160         printf("\tserial = %u\n", soa.serial);
 161         printf("\trefresh = %u\n", soa.refresh);
 162         printf("\tretry = %u\n", soa.retry);
 163         printf("\texpire = %u\n", soa.expire);
 164         printf("\tminimum = %u\n", soa.minimum);
 165         dns_rdata_freestruct(&soa);
 166 }
 167
 168 static void
 169 printa(dns_rdata_t *rdata) {
 170         isc_result_t result;
 171         char text[sizeof("255.255.255.255")];
 172         isc_buffer_t b;
 173
 174         isc_buffer_init(&b, text, sizeof(text));
 175         result = dns_rdata_totext(rdata, NULL, &b);
 176         check_result(result, "dns_rdata_totext");
 177         printf("Address: %.*s\n", (int)isc_buffer_usedlength(&b),
 178                (char *)isc_buffer_base(&b));
 179 }
 180 #ifdef DIG_SIGCHASE
 181 /* Just for compatibility : not use in host program */
 182 isc_result_t
 183 printrdataset(dns_name_t *owner_name, dns_rdataset_t *rdataset,
 184               isc_buffer_t *target)
 185 {
 186         UNUSED(owner_name);
 187         UNUSED(rdataset);
 188         UNUSED(target);
 189         return(ISC_FALSE);
 190 }
 191 #endif
 192 static void
 193 printrdata(dns_rdata_t *rdata) {
 194         isc_result_t result;
 195         isc_buffer_t *b = NULL;
 196         unsigned int size = 1024;
 197         isc_boolean_t done = ISC_FALSE;
 198
 199         if (rdata->type < N_KNOWN_RRTYPES)
 200                 printf("%s", rtypetext[rdata->type]);
 201         else
 202                 printf("rdata_%d = ", rdata->type);
 203
 204         while (!done) {
 205                 result = isc_buffer_allocate(mctx, &b, size);
 206                 if (result != ISC_R_SUCCESS)
 207                         check_result(result, "isc_buffer_allocate");
 208                 result = dns_rdata_totext(rdata, NULL, b);
 209                 if (result == ISC_R_SUCCESS) {
 210                         printf("%.*s\n", (int)isc_buffer_usedlength(b),
 211                                (char *)isc_buffer_base(b));
 212                         done = ISC_TRUE;
 213                 } else if (result != ISC_R_NOSPACE)
 214                         check_result(result, "dns_rdata_totext");
 215                 isc_buffer_free(&b);
 216                 size *= 2;
 217         }
 218 }
 219
 220 static isc_result_t
 221 printsection(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers,
 222              dns_section_t section) {
 223         isc_result_t result, loopresult;
 224         dns_name_t *name;
 225         dns_rdataset_t *rdataset = NULL;
 226         dns_rdata_t rdata = DNS_RDATA_INIT;
 227         char namebuf[DNS_NAME_FORMATSIZE];
 228
 229         UNUSED(query);
 230         UNUSED(headers);
 231
 232         debug("printsection()");
 233
 234         result = dns_message_firstname(msg, section);
 235         if (result == ISC_R_NOMORE)
 236                 return (ISC_R_SUCCESS);
 237         else if (result != ISC_R_SUCCESS)
 238                 return (result);
 239         for (;;) {
 240                 name = NULL;
 241                 dns_message_currentname(msg, section,
 242                                         &name);
 243                 for (rdataset = ISC_LIST_HEAD(name->list);
 244                      rdataset != NULL;
 245                      rdataset = ISC_LIST_NEXT(rdataset, link)) {
 246                         loopresult = dns_rdataset_first(rdataset);
 247                         while (loopresult == ISC_R_SUCCESS) {
 248                                 dns_rdataset_current(rdataset, &rdata);
 249                                 switch (rdata.type) {
 250                                 case dns_rdatatype_a:
 251                                         if (section != DNS_SECTION_ANSWER)
 252                                                 goto def_short_section;
 253                                         dns_name_format(name, namebuf,
 254                                                         sizeof(namebuf));
 255                                         printf("Name:\t%s\n", namebuf);
 256                                         printa(&rdata);
 257                                         break;
 258                                 case dns_rdatatype_soa:
 259                                         dns_name_format(name, namebuf,
 260                                                         sizeof(namebuf));
 261                                         printf("%s\n", namebuf);
 262                                         printsoa(&rdata);
 263                                         break;
 264                                 default:
 265                                 def_short_section:
 266                                         dns_name_format(name, namebuf,
 267                                                         sizeof(namebuf));
 268                                         printf("%s\t", namebuf);
 269                                         printrdata(&rdata);
 270                                         break;
 271                                 }
 272                                 dns_rdata_reset(&rdata);
 273                                 loopresult = dns_rdataset_next(rdataset);
 274                         }
 275                 }
 276                 result = dns_message_nextname(msg, section);
 277                 if (result == ISC_R_NOMORE)
 278                         break;
 279                 else if (result != ISC_R_SUCCESS) {
 280                         return (result);
 281                 }
 282         }
 283         return (ISC_R_SUCCESS);
 284 }
 285
 286 static isc_result_t
 287 detailsection(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers,
 288              dns_section_t section) {
 289         isc_result_t result, loopresult;
 290         dns_name_t *name;
 291         dns_rdataset_t *rdataset = NULL;
 292         dns_rdata_t rdata = DNS_RDATA_INIT;
 293         char namebuf[DNS_NAME_FORMATSIZE];
 294
 295         UNUSED(query);
 296
 297         debug("detailsection()");
 298
 299         if (headers) {
 300                 switch (section) {
 301                 case DNS_SECTION_QUESTION:
 302                         puts("    QUESTIONS:");
 303                         break;
 304                 case DNS_SECTION_ANSWER:
 305                         puts("    ANSWERS:");
 306                         break;
 307                 case DNS_SECTION_AUTHORITY:
 308                         puts("    AUTHORITY RECORDS:");
 309                         break;
 310                 case DNS_SECTION_ADDITIONAL:
 311                         puts("    ADDITIONAL RECORDS:");
 312                         break;
 313                 }
 314         }
 315
 316         result = dns_message_firstname(msg, section);
 317         if (result == ISC_R_NOMORE)
 318                 return (ISC_R_SUCCESS);
 319         else if (result != ISC_R_SUCCESS)
 320                 return (result);
 321         for (;;) {
 322                 name = NULL;
 323                 dns_message_currentname(msg, section,
 324                                         &name);
 325                 for (rdataset = ISC_LIST_HEAD(name->list);
 326                      rdataset != NULL;
 327                      rdataset = ISC_LIST_NEXT(rdataset, link)) {
 328                         if (section == DNS_SECTION_QUESTION) {
 329                                 dns_name_format(name, namebuf,
 330                                                 sizeof(namebuf));
 331                                 printf("\t%s, ", namebuf);
 332                                 dns_rdatatype_format(rdataset->type,
 333                                                      namebuf,
 334                                                      sizeof(namebuf));
 335                                 printf("type = %s, ", namebuf);
 336                                 dns_rdataclass_format(rdataset->rdclass,
 337                                                       namebuf,
 338                                                       sizeof(namebuf));
 339                                 printf("class = %s\n", namebuf);
 340                         }
 341                         loopresult = dns_rdataset_first(rdataset);
 342                         while (loopresult == ISC_R_SUCCESS) {
 343                                 dns_rdataset_current(rdataset, &rdata);
 344
 345                                 dns_name_format(name, namebuf,
 346                                                 sizeof(namebuf));
 347                                 printf("    ->  %s\n", namebuf);
 348
 349                                 switch (rdata.type) {
 350                                 case dns_rdatatype_soa:
 351                                         printsoa(&rdata);
 352                                         break;
 353                                 default:
 354                                         printf("\t");
 355                                         printrdata(&rdata);
 356                                 }
 357                                 dns_rdata_reset(&rdata);
 358                                 loopresult = dns_rdataset_next(rdataset);
 359                         }
 360                 }
 361                 result = dns_message_nextname(msg, section);
 362                 if (result == ISC_R_NOMORE)
 363                         break;
 364                 else if (result != ISC_R_SUCCESS) {
 365                         return (result);
 366                 }
 367         }
 368         return (ISC_R_SUCCESS);
 369 }
 370
 371 void
 372 received(int bytes, isc_sockaddr_t *from, dig_query_t *query)
 373 {
 374         UNUSED(bytes);
 375         UNUSED(from);
 376         UNUSED(query);
 377 }
 378
 379 void
 380 trying(char *frm, dig_lookup_t *lookup) {
 381         UNUSED(frm);
 382         UNUSED(lookup);
 383
 384 }
 385
 386 isc_result_t
 387 printmessage(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers) {
 388         char servtext[ISC_SOCKADDR_FORMATSIZE];
 389
 390         debug("printmessage()");
 391
 392         isc_sockaddr_format(&query->sockaddr, servtext, sizeof(servtext));
 393         printf("Server:\t\t%s\n", query->userarg);
 394         printf("Address:\t%s\n", servtext);
 395
 396         puts("");
 397
 398         if (!short_form) {
 399                 isc_boolean_t headers = ISC_TRUE;
 400                 puts("------------");
 401                 /*              detailheader(query, msg);*/
 402                 detailsection(query, msg, headers, DNS_SECTION_QUESTION);
 403                 detailsection(query, msg, headers, DNS_SECTION_ANSWER);
 404                 detailsection(query, msg, headers, DNS_SECTION_AUTHORITY);
 405                 detailsection(query, msg, headers, DNS_SECTION_ADDITIONAL);
 406                 puts("------------");
 407         }
 408
 409         if (msg->rcode != 0) {
 410                 char nametext[DNS_NAME_FORMATSIZE];
 411                 dns_name_format(query->lookup->name,
 412                                 nametext, sizeof(nametext));
 413                 printf("** server can't find %s: %s\n",
 414                        (msg->rcode != dns_rcode_nxdomain) ? nametext :
 415                        query->lookup->textname, rcodetext[msg->rcode]);
 416                 debug("returning with rcode == 0");
 417                 return (ISC_R_SUCCESS);
 418         }
 419
 420         if ((msg->flags & DNS_MESSAGEFLAG_AA) == 0)
 421                 puts("Non-authoritative answer:");
 422         if (!ISC_LIST_EMPTY(msg->sections[DNS_SECTION_ANSWER]))
 423                 printsection(query, msg, headers, DNS_SECTION_ANSWER);
 424         else
 425                 printf("*** Can't find %s: No answer\n",
 426                        query->lookup->textname);
 427
 428         if (((msg->flags & DNS_MESSAGEFLAG_AA) == 0) &&
 429             (query->lookup->rdtype != dns_rdatatype_a)) {
 430                 puts("\nAuthoritative answers can be found from:");
 431                 printsection(query, msg, headers,
 432                              DNS_SECTION_AUTHORITY);
 433                 printsection(query, msg, headers,
 434                              DNS_SECTION_ADDITIONAL);
 435         }
 436         return (ISC_R_SUCCESS);
 437 }
 438
 439 static void
 440 show_settings(isc_boolean_t full, isc_boolean_t serv_only) {
 441         dig_server_t *srv;
 442         isc_sockaddr_t sockaddr;
 443         dig_searchlist_t *listent;
 444
 445         srv = ISC_LIST_HEAD(server_list);
 446
 447         while (srv != NULL) {
 448                 char sockstr[ISC_SOCKADDR_FORMATSIZE];
 449
 450                 get_address(srv->servername, port, &sockaddr);
 451                 isc_sockaddr_format(&sockaddr, sockstr, sizeof(sockstr));
 452                 printf("Default server: %s\nAddress: %s\n",
 453                         srv->userarg, sockstr);
 454                 if (!full)
 455                         return;
 456                 srv = ISC_LIST_NEXT(srv, link);
 457         }
 458         if (serv_only)
 459                 return;
 460         printf("\nSet options:\n");
 461         printf("  %s\t\t\t%s\t\t%s\n",
 462                tcpmode ? "vc" : "novc",
 463                short_form ? "nodebug" : "debug",
 464                debugging ? "d2" : "nod2");
 465         printf("  %s\t\t%s\n",
 466                usesearch ? "search" : "nosearch",
 467                recurse ? "recurse" : "norecurse");
 468         printf("  timeout = %d\t\tretry = %d\tport = %d\n",
 469                timeout, tries, port);
 470         printf("  querytype = %-8s\tclass = %s\n", deftype, defclass);
 471         printf("  srchlist = ");
 472         for (listent = ISC_LIST_HEAD(search_list);
 473              listent != NULL;
 474              listent = ISC_LIST_NEXT(listent, link)) {
 475                      printf("%s", listent->origin);
 476                      if (ISC_LIST_NEXT(listent, link) != NULL)
 477                              printf("/");
 478         }
 479         printf("\n");
 480 }
 481
 482 static isc_boolean_t
 483 testtype(char *typetext) {
 484         isc_result_t result;
 485         isc_textregion_t tr;
 486         dns_rdatatype_t rdtype;
 487
 488         tr.base = typetext;
 489         tr.length = strlen(typetext);
 490         result = dns_rdatatype_fromtext(&rdtype, &tr);
 491         if (result == ISC_R_SUCCESS)
 492                 return (ISC_TRUE);
 493         else {
 494                 printf("unknown query type: %s\n", typetext);
 495                 return (ISC_FALSE);
 496         }
 497 }
 498
 499 static isc_boolean_t
 500 testclass(char *typetext) {
 501         isc_result_t result;
 502         isc_textregion_t tr;
 503         dns_rdataclass_t rdclass;
 504
 505         tr.base = typetext;
 506         tr.length = strlen(typetext);
 507         result = dns_rdataclass_fromtext(&rdclass, &tr);
 508         if (result == ISC_R_SUCCESS)
 509                 return (ISC_TRUE);
 510         else {
 511                 printf("unknown query class: %s\n", typetext);
 512                 return (ISC_FALSE);
 513         }
 514 }
 515
 516 static void
 517 safecpy(char *dest, char *src, int size) {
 518         strncpy(dest, src, size);
 519         dest[size-1] = 0;
 520 }
 521
 522 static isc_result_t
 523 parse_uint(isc_uint32_t *uip, const char *value, isc_uint32_t max,
 524            const char *desc) {
 525         isc_uint32_t n;
 526         isc_result_t result = isc_parse_uint32(&n, value, 10);
 527         if (result == ISC_R_SUCCESS && n > max)
 528                 result = ISC_R_RANGE;
 529         if (result != ISC_R_SUCCESS) {
 530                 printf("invalid %s '%s': %s\n", desc,
 531                        value, isc_result_totext(result));
 532                 return result;
 533         }
 534         *uip = n;
 535         return (ISC_R_SUCCESS);
 536 }
 537
 538 static void
 539 set_port(const char *value) {
 540         isc_uint32_t n;
 541         isc_result_t result = parse_uint(&n, value, 65535, "port");
 542         if (result == ISC_R_SUCCESS)
 543                 port = (isc_uint16_t) n;
 544 }
 545
 546 static void
 547 set_timeout(const char *value) {
 548         isc_uint32_t n;
 549         isc_result_t result = parse_uint(&n, value, UINT_MAX, "timeout");
 550         if (result == ISC_R_SUCCESS)
 551                 timeout = n;
 552 }
 553
 554 static void
 555 set_tries(const char *value) {
 556         isc_uint32_t n;
 557         isc_result_t result = parse_uint(&n, value, INT_MAX, "tries");
 558         if (result == ISC_R_SUCCESS)
 559                 tries = n;
 560 }
 561
 562 static void
 563 setoption(char *opt) {
 564         if (strncasecmp(opt, "all", 4) == 0) {
 565                 show_settings(ISC_TRUE, ISC_FALSE);
 566         } else if (strncasecmp(opt, "class=", 6) == 0) {
 567                 if (testclass(&opt[6]))
 568                         safecpy(defclass, &opt[6], sizeof(defclass));
 569         } else if (strncasecmp(opt, "cl=", 3) == 0) {
 570                 if (testclass(&opt[3]))
 571                         safecpy(defclass, &opt[3], sizeof(defclass));
 572         } else if (strncasecmp(opt, "type=", 5) == 0) {
 573                 if (testtype(&opt[5]))
 574                         safecpy(deftype, &opt[5], sizeof(deftype));
 575         } else if (strncasecmp(opt, "ty=", 3) == 0) {
 576                 if (testtype(&opt[3]))
 577                         safecpy(deftype, &opt[3], sizeof(deftype));
 578         } else if (strncasecmp(opt, "querytype=", 10) == 0) {
 579                 if (testtype(&opt[10]))
 580                         safecpy(deftype, &opt[10], sizeof(deftype));
 581         } else if (strncasecmp(opt, "query=", 6) == 0) {
 582                 if (testtype(&opt[6]))
 583                         safecpy(deftype, &opt[6], sizeof(deftype));
 584         } else if (strncasecmp(opt, "qu=", 3) == 0) {
 585                 if (testtype(&opt[3]))
 586                         safecpy(deftype, &opt[3], sizeof(deftype));
 587         } else if (strncasecmp(opt, "q=", 2) == 0) {
 588                 if (testtype(&opt[2]))
 589                         safecpy(deftype, &opt[2], sizeof(deftype));
 590         } else if (strncasecmp(opt, "domain=", 7) == 0) {
 591                 safecpy(domainopt, &opt[7], sizeof(domainopt));
 592                 set_search_domain(domainopt);
 593                 usesearch = ISC_TRUE;
 594         } else if (strncasecmp(opt, "do=", 3) == 0) {
 595                 safecpy(domainopt, &opt[3], sizeof(domainopt));
 596                 set_search_domain(domainopt);
 597                 usesearch = ISC_TRUE;
 598         } else if (strncasecmp(opt, "port=", 5) == 0) {
 599                 set_port(&opt[5]);
 600         } else if (strncasecmp(opt, "po=", 3) == 0) {
 601                 set_port(&opt[3]);
 602         } else if (strncasecmp(opt, "timeout=", 8) == 0) {
 603                 set_timeout(&opt[8]);
 604         } else if (strncasecmp(opt, "t=", 2) == 0) {
 605                 set_timeout(&opt[2]);
 606         } else if (strncasecmp(opt, "rec", 3) == 0) {
 607                 recurse = ISC_TRUE;
 608         } else if (strncasecmp(opt, "norec", 5) == 0) {
 609                 recurse = ISC_FALSE;
 610         } else if (strncasecmp(opt, "retry=", 6) == 0) {
 611                 set_tries(&opt[6]);
 612         } else if (strncasecmp(opt, "ret=", 4) == 0) {
 613                 set_tries(&opt[4]);
 614         } else if (strncasecmp(opt, "def", 3) == 0) {
 615                 usesearch = ISC_TRUE;
 616         } else if (strncasecmp(opt, "nodef", 5) == 0) {
 617                 usesearch = ISC_FALSE;
 618         } else if (strncasecmp(opt, "vc", 3) == 0) {
 619                 tcpmode = ISC_TRUE;
 620         } else if (strncasecmp(opt, "novc", 5) == 0) {
 621                 tcpmode = ISC_FALSE;
 622         } else if (strncasecmp(opt, "deb", 3) == 0) {
 623                 short_form = ISC_FALSE;
 624                 showsearch = ISC_TRUE;
 625         } else if (strncasecmp(opt, "nodeb", 5) == 0) {
 626                 short_form = ISC_TRUE;
 627                 showsearch = ISC_FALSE;
 628         } else if (strncasecmp(opt, "d2", 2) == 0) {
 629                 debugging = ISC_TRUE;
 630         } else if (strncasecmp(opt, "nod2", 4) == 0) {
 631                 debugging = ISC_FALSE;
 632         } else if (strncasecmp(opt, "search", 3) == 0) {
 633                 usesearch = ISC_TRUE;
 634         } else if (strncasecmp(opt, "nosearch", 5) == 0) {
 635                 usesearch = ISC_FALSE;
 636         } else if (strncasecmp(opt, "sil", 3) == 0) {
 637                 /* deprecation_msg = ISC_FALSE; */
 638         } else if (strncasecmp(opt, "fail", 3) == 0) {
 639                 nofail=ISC_FALSE;
 640         } else if (strncasecmp(opt, "nofail", 3) == 0) {
 641                 nofail=ISC_TRUE;
 642         } else {
 643                 printf("*** Invalid option: %s\n", opt);
 644         }
 645 }
 646
 647 static void
 648 addlookup(char *opt) {
 649         dig_lookup_t *lookup;
 650         isc_result_t result;
 651         isc_textregion_t tr;
 652         dns_rdatatype_t rdtype;
 653         dns_rdataclass_t rdclass;
 654         char store[MXNAME];
 655
 656         debug("addlookup()");
 657         tr.base = deftype;
 658         tr.length = strlen(deftype);
 659         result = dns_rdatatype_fromtext(&rdtype, &tr);
 660         if (result != ISC_R_SUCCESS) {
 661                 printf("unknown query type: %s\n", deftype);
 662                 rdclass = dns_rdatatype_a;
 663         }
 664         tr.base = defclass;
 665         tr.length = strlen(defclass);
 666         result = dns_rdataclass_fromtext(&rdclass, &tr);
 667         if (result != ISC_R_SUCCESS) {
 668                 printf("unknown query class: %s\n", defclass);
 669                 rdclass = dns_rdataclass_in;
 670         }
 671         lookup = make_empty_lookup();
 672         if (get_reverse(store, sizeof(store), opt, lookup->ip6_int, ISC_TRUE)
 673             == ISC_R_SUCCESS) {
 674                 safecpy(lookup->textname, store, sizeof(lookup->textname));
 675                 lookup->rdtype = dns_rdatatype_ptr;
 676                 lookup->rdtypeset = ISC_TRUE;
 677         } else {
 678                 safecpy(lookup->textname, opt, sizeof(lookup->textname));
 679                 lookup->rdtype = rdtype;
 680                 lookup->rdtypeset = ISC_TRUE;
 681         }
 682         lookup->rdclass = rdclass;
 683         lookup->rdclassset = ISC_TRUE;
 684         lookup->trace = ISC_FALSE;
 685         lookup->trace_root = lookup->trace;
 686         lookup->ns_search_only = ISC_FALSE;
 687         lookup->identify = identify;
 688         lookup->recurse = recurse;
 689         lookup->aaonly = aaonly;
 690         lookup->retries = tries;
 691         lookup->udpsize = 0;
 692         lookup->comments = comments;
 693         lookup->tcp_mode = tcpmode;
 694         lookup->stats = stats;
 695         lookup->section_question = section_question;
 696         lookup->section_answer = section_answer;
 697         lookup->section_authority = section_authority;
 698         lookup->section_additional = section_additional;
 699         lookup->new_search = ISC_TRUE;
 700         if (nofail)
 701                 lookup->servfail_stops = ISC_FALSE;
 702         ISC_LIST_INIT(lookup->q);
 703         ISC_LINK_INIT(lookup, link);
 704         ISC_LIST_APPEND(lookup_list, lookup, link);
 705         lookup->origin = NULL;
 706         ISC_LIST_INIT(lookup->my_server_list);
 707         debug("looking up %s", lookup->textname);
 708 }
 709
 710 static void
 711 get_next_command(void) {
 712         char *buf;
 713         char *ptr, *arg;
 714         char *input;
 715
 716         fflush(stdout);
 717         buf = isc_mem_allocate(mctx, COMMSIZE);
 718         if (buf == NULL)
 719                 fatal("memory allocation failure");
 720         fputs("> ", stderr);
 721         fflush(stderr);
 722         isc_app_block();
 723         ptr = fgets(buf, COMMSIZE, stdin);
 724         isc_app_unblock();
 725         if (ptr == NULL) {
 726                 in_use = ISC_FALSE;
 727                 goto cleanup;
 728         }
 729         input = buf;
 730         ptr = next_token(&input, " \t\r\n");
 731         if (ptr == NULL)
 732                 goto cleanup;
 733         arg = next_token(&input, " \t\r\n");
 734         if ((strcasecmp(ptr, "set") == 0) &&
 735             (arg != NULL))
 736                 setoption(arg);
 737         else if ((strcasecmp(ptr, "server") == 0) ||
 738                  (strcasecmp(ptr, "lserver") == 0)) {
 739                 isc_app_block();
 740                 set_nameserver(arg);
 741                 check_ra = ISC_FALSE;
 742                 isc_app_unblock();
 743                 show_settings(ISC_TRUE, ISC_TRUE);
 744         } else if (strcasecmp(ptr, "exit") == 0) {
 745                 in_use = ISC_FALSE;
 746                 goto cleanup;
 747         } else if (strcasecmp(ptr, "help") == 0 ||
 748                    strcasecmp(ptr, "?") == 0) {
 749                 printf("The '%s' command is not yet implemented.\n", ptr);
 750                 goto cleanup;
 751         } else if (strcasecmp(ptr, "finger") == 0 ||
 752                    strcasecmp(ptr, "root") == 0 ||
 753                    strcasecmp(ptr, "ls") == 0 ||
 754                    strcasecmp(ptr, "view") == 0) {
 755                 printf("The '%s' command is not implemented.\n", ptr);
 756                 goto cleanup;
 757         } else
 758                 addlookup(ptr);
 759  cleanup:
 760         isc_mem_free(mctx, buf);
 761 }
 762
 763 static void
 764 parse_args(int argc, char **argv) {
 765         isc_boolean_t have_lookup = ISC_FALSE;
 766
 767         usesearch = ISC_TRUE;
 768         for (argc--, argv++; argc > 0; argc--, argv++) {
 769                 debug("main parsing %s", argv[0]);
 770                 if (argv[0][0] == '-') {
 771                         if (argv[0][1] != 0)
 772                                 setoption(&argv[0][1]);
 773                         else
 774                                 have_lookup = ISC_TRUE;
 775                 } else {
 776                         if (!have_lookup) {
 777                                 have_lookup = ISC_TRUE;
 778                                 in_use = ISC_TRUE;
 779                                 addlookup(argv[0]);
 780                         } else {
 781                                 set_nameserver(argv[0]);
 782                                 check_ra = ISC_FALSE;
 783                         }
 784                 }
 785         }
 786 }
 787
 788 static void
 789 flush_lookup_list(void) {
 790         dig_lookup_t *l, *lp;
 791         dig_query_t *q, *qp;
 792         dig_server_t *s, *sp;
 793
 794         lookup_counter = 0;
 795         l = ISC_LIST_HEAD(lookup_list);
 796         while (l != NULL) {
 797                 q = ISC_LIST_HEAD(l->q);
 798                 while (q != NULL) {
 799                         if (q->sock != NULL) {
 800                                 isc_socket_cancel(q->sock, NULL,
 801                                                   ISC_SOCKCANCEL_ALL);
 802                                 isc_socket_detach(&q->sock);
 803                         }
 804                         if (ISC_LINK_LINKED(&q->recvbuf, link))
 805                                 ISC_LIST_DEQUEUE(q->recvlist, &q->recvbuf,
 806                                                  link);
 807                         if (ISC_LINK_LINKED(&q->lengthbuf, link))
 808                                 ISC_LIST_DEQUEUE(q->lengthlist, &q->lengthbuf,
 809                                                  link);
 810                         isc_buffer_invalidate(&q->recvbuf);
 811                         isc_buffer_invalidate(&q->lengthbuf);
 812                         qp = q;
 813                         q = ISC_LIST_NEXT(q, link);
 814                         ISC_LIST_DEQUEUE(l->q, qp, link);
 815                         isc_mem_free(mctx, qp);
 816                 }
 817                 s = ISC_LIST_HEAD(l->my_server_list);
 818                 while (s != NULL) {
 819                         sp = s;
 820                         s = ISC_LIST_NEXT(s, link);
 821                         ISC_LIST_DEQUEUE(l->my_server_list, sp, link);
 822                         isc_mem_free(mctx, sp);
 823
 824                 }
 825                 if (l->sendmsg != NULL)
 826                         dns_message_destroy(&l->sendmsg);
 827                 if (l->timer != NULL)
 828                         isc_timer_detach(&l->timer);
 829                 lp = l;
 830                 l = ISC_LIST_NEXT(l, link);
 831                 ISC_LIST_DEQUEUE(lookup_list, lp, link);
 832                 isc_mem_free(mctx, lp);
 833         }
 834 }
 835
 836 static void
 837 getinput(isc_task_t *task, isc_event_t *event) {
 838         UNUSED(task);
 839         if (global_event == NULL)
 840                 global_event = event;
 841         while (in_use) {
 842                 get_next_command();
 843                 if (ISC_LIST_HEAD(lookup_list) != NULL) {
 844                         start_lookup();
 845                         return;
 846                 }
 847         }
 848         isc_app_shutdown();
 849 }
 850
 851 int
 852 main(int argc, char **argv) {
 853         isc_result_t result;
 854
 855         ISC_LIST_INIT(lookup_list);
 856         ISC_LIST_INIT(server_list);
 857         ISC_LIST_INIT(search_list);
 858
 859         check_ra = ISC_TRUE;
 860
 861         result = isc_app_start();
 862         check_result(result, "isc_app_start");
 863
 864         setup_libs();
 865         progname = argv[0];
 866
 867         parse_args(argc, argv);
 868
 869         setup_system();
 870         if (domainopt[0] != '\0')
 871                 set_search_domain(domainopt);
 872         if (in_use)
 873                 result = isc_app_onrun(mctx, global_task, onrun_callback,
 874                                        NULL);
 875         else
 876                 result = isc_app_onrun(mctx, global_task, getinput, NULL);
 877         check_result(result, "isc_app_onrun");
 878         in_use = ISC_TF(!in_use);
 879
 880         (void)isc_app_run();
 881
 882         puts("");
 883         debug("done, and starting to shut down");
 884         if (global_event != NULL)
 885                 isc_event_free(&global_event);
 886         cancel_all();
 887         destroy_libs();
 888         isc_app_finish();
 889
 890         return (0);
 891 }