bin/dig/dig.c

   1 /*
   2  * Copyright (C) 2004-2010  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: dig.c,v 1.233.62.3 2010/05/13 00:42:26 marka Exp $ */
  19
  20 /*! \file */
  21
  22 #include <config.h>
  23 #include <stdlib.h>
  24 #include <time.h>
  25 #include <ctype.h>
  26
  27 #include <isc/app.h>
  28 #include <isc/netaddr.h>
  29 #include <isc/parseint.h>
  30 #include <isc/print.h>
  31 #include <isc/string.h>
  32 #include <isc/util.h>
  33 #include <isc/task.h>
  34
  35 #include <dns/byaddr.h>
  36 #include <dns/fixedname.h>
  37 #include <dns/masterdump.h>
  38 #include <dns/message.h>
  39 #include <dns/name.h>
  40 #include <dns/rdata.h>
  41 #include <dns/rdataset.h>
  42 #include <dns/rdatatype.h>
  43 #include <dns/rdataclass.h>
  44 #include <dns/result.h>
  45 #include <dns/tsig.h>
  46
  47 #include <bind9/getaddresses.h>
  48
  49 #include <dig/dig.h>
  50
  51 #define ADD_STRING(b, s) {                              \
  52         if (strlen(s) >= isc_buffer_availablelength(b)) \
  53                 return (ISC_R_NOSPACE);                 \
  54         else                                            \
  55                 isc_buffer_putstr(b, s);                \
  56 }
  57
  58 #define DIG_MAX_ADDRESSES 20
  59
  60 dig_lookup_t *default_lookup = NULL;
  61
  62 static char *batchname = NULL;
  63 static FILE *batchfp = NULL;
  64 static char *argv0;
  65 static int addresscount = 0;
  66
  67 static char domainopt[DNS_NAME_MAXTEXT];
  68
  69 static isc_boolean_t short_form = ISC_FALSE, printcmd = ISC_TRUE,
  70         ip6_int = ISC_FALSE, plusquest = ISC_FALSE, pluscomm = ISC_FALSE,
  71         multiline = ISC_FALSE, nottl = ISC_FALSE, noclass = ISC_FALSE;
  72
  73 /*% opcode text */
  74 static const char * const opcodetext[] = {
  75         "QUERY",
  76         "IQUERY",
  77         "STATUS",
  78         "RESERVED3",
  79         "NOTIFY",
  80         "UPDATE",
  81         "RESERVED6",
  82         "RESERVED7",
  83         "RESERVED8",
  84         "RESERVED9",
  85         "RESERVED10",
  86         "RESERVED11",
  87         "RESERVED12",
  88         "RESERVED13",
  89         "RESERVED14",
  90         "RESERVED15"
  91 };
  92
  93 /*% return code text */
  94 static const char * const rcodetext[] = {
  95         "NOERROR",
  96         "FORMERR",
  97         "SERVFAIL",
  98         "NXDOMAIN",
  99         "NOTIMP",
 100         "REFUSED",
 101         "YXDOMAIN",
 102         "YXRRSET",
 103         "NXRRSET",
 104         "NOTAUTH",
 105         "NOTZONE",
 106         "RESERVED11",
 107         "RESERVED12",
 108         "RESERVED13",
 109         "RESERVED14",
 110         "RESERVED15",
 111         "BADVERS"
 112 };
 113
 114 /*% safe rcodetext[] */
 115 static char *
 116 rcode_totext(dns_rcode_t rcode)
 117 {
 118         static char buf[sizeof("?65535")];
 119         union {
 120                 const char *consttext;
 121                 char *deconsttext;
 122         } totext;
 123
 124         if (rcode >= (sizeof(rcodetext)/sizeof(rcodetext[0]))) {
 125                 snprintf(buf, sizeof(buf), "?%u", rcode);
 126                 totext.deconsttext = buf;
 127         } else
 128                 totext.consttext = rcodetext[rcode];
 129         return totext.deconsttext;
 130 }
 131
 132 /*% print usage */
 133 static void
 134 print_usage(FILE *fp) {
 135         fputs(
 136 "Usage:  dig [@global-server] [domain] [q-type] [q-class] {q-opt}\n"
 137 "            {global-d-opt} host [@local-server] {local-d-opt}\n"
 138 "            [ host [@local-server] {local-d-opt} [...]]\n", fp);
 139 }
 140
 141 ISC_PLATFORM_NORETURN_PRE static void
 142 usage(void) ISC_PLATFORM_NORETURN_POST;
 143
 144 static void
 145 usage(void) {
 146         print_usage(stderr);
 147         fputs("\nUse \"dig -h\" (or \"dig -h | more\") "
 148               "for complete list of options\n", stderr);
 149         exit(1);
 150 }
 151
 152 /*% version */
 153 static void
 154 version(void) {
 155         fputs("DiG " VERSION "\n", stderr);
 156 }
 157
 158 /*% help */
 159 static void
 160 help(void) {
 161         print_usage(stdout);
 162         fputs(
 163 "Where:  domain   is in the Domain Name System\n"
 164 "        q-class  is one of (in,hs,ch,...) [default: in]\n"
 165 "        q-type   is one of (a,any,mx,ns,soa,hinfo,axfr,txt,...) [default:a]\n"
 166 "                 (Use ixfr=version for type ixfr)\n"
 167 "        q-opt    is one of:\n"
 168 "                 -x dot-notation     (shortcut for reverse lookups)\n"
 169 "                 -i                  (use IP6.INT for IPv6 reverse lookups)\n"
 170 "                 -f filename         (batch mode)\n"
 171 "                 -b address[#port]   (bind to source address/port)\n"
 172 "                 -p port             (specify port number)\n"
 173 "                 -q name             (specify query name)\n"
 174 "                 -t type             (specify query type)\n"
 175 "                 -c class            (specify query class)\n"
 176 "                 -k keyfile          (specify tsig key file)\n"
 177 "                 -y [hmac:]name:key  (specify named base64 tsig key)\n"
 178 "                 -4                  (use IPv4 query transport only)\n"
 179 "                 -6                  (use IPv6 query transport only)\n"
 180 "                 -m                  (enable memory usage debugging)\n"
 181 "        d-opt    is of the form +keyword[=value], where keyword is:\n"
 182 "                 +[no]vc             (TCP mode)\n"
 183 "                 +[no]tcp            (TCP mode, alternate syntax)\n"
 184 "                 +time=###           (Set query timeout) [5]\n"
 185 "                 +tries=###          (Set number of UDP attempts) [3]\n"
 186 "                 +retry=###          (Set number of UDP retries) [2]\n"
 187 "                 +domain=###         (Set default domainname)\n"
 188 "                 +bufsize=###        (Set EDNS0 Max UDP packet size)\n"
 189 "                 +ndots=###          (Set NDOTS value)\n"
 190 "                 +edns=###           (Set EDNS version)\n"
 191 "                 +[no]search         (Set whether to use searchlist)\n"
 192 "                 +[no]showsearch     (Search with intermediate results)\n"
 193 "                 +[no]defname        (Ditto)\n"
 194 "                 +[no]recurse        (Recursive mode)\n"
 195 "                 +[no]ignore         (Don't revert to TCP for TC responses.)"
 196 "\n"
 197 "                 +[no]fail           (Don't try next server on SERVFAIL)\n"
 198 "                 +[no]besteffort     (Try to parse even illegal messages)\n"
 199 "                 +[no]aaonly         (Set AA flag in query (+[no]aaflag))\n"
 200 "                 +[no]adflag         (Set AD flag in query)\n"
 201 "                 +[no]cdflag         (Set CD flag in query)\n"
 202 "                 +[no]cl             (Control display of class in records)\n"
 203 "                 +[no]cmd            (Control display of command line)\n"
 204 "                 +[no]comments       (Control display of comment lines)\n"
 205 "                 +[no]question       (Control display of question)\n"
 206 "                 +[no]answer         (Control display of answer)\n"
 207 "                 +[no]authority      (Control display of authority)\n"
 208 "                 +[no]additional     (Control display of additional)\n"
 209 "                 +[no]stats          (Control display of statistics)\n"
 210 "                 +[no]short          (Disable everything except short\n"
 211 "                                      form of answer)\n"
 212 "                 +[no]ttlid          (Control display of ttls in records)\n"
 213 "                 +[no]all            (Set or clear all display flags)\n"
 214 "                 +[no]qr             (Print question before sending)\n"
 215 "                 +[no]nssearch       (Search all authoritative nameservers)\n"
 216 "                 +[no]identify       (ID responders in short answers)\n"
 217 "                 +[no]trace          (Trace delegation down from root)\n"
 218 "                 +[no]dnssec         (Request DNSSEC records)\n"
 219 "                 +[no]nsid           (Request Name Server ID)\n"
 220 #ifdef DIG_SIGCHASE
 221 "                 +[no]sigchase       (Chase DNSSEC signatures)\n"
 222 "                 +trusted-key=####   (Trusted Key when chasing DNSSEC sigs)\n"
 223 #if DIG_SIGCHASE_TD
 224 "                 +[no]topdown        (Do DNSSEC validation top down mode)\n"
 225 #endif
 226 #endif
 227 "                 +[no]multiline      (Print records in an expanded format)\n"
 228 "        global d-opts and servers (before host name) affect all queries.\n"
 229 "        local d-opts and servers (after host name) affect only that lookup.\n"
 230 "        -h                           (print help and exit)\n"
 231 "        -v                           (print version and exit)\n",
 232         stdout);
 233 }
 234
 235 /*%
 236  * Callback from dighost.c to print the received message.
 237  */
 238 void
 239 received(int bytes, isc_sockaddr_t *from, dig_query_t *query) {
 240         isc_uint64_t diff;
 241         isc_time_t now;
 242         time_t tnow;
 243         char fromtext[ISC_SOCKADDR_FORMATSIZE];
 244
 245         isc_sockaddr_format(from, fromtext, sizeof(fromtext));
 246
 247         TIME_NOW(&now);
 248
 249         if (query->lookup->stats && !short_form) {
 250                 diff = isc_time_microdiff(&now, &query->time_sent);
 251                 printf(";; Query time: %ld msec\n", (long int)diff/1000);
 252                 printf(";; SERVER: %s(%s)\n", fromtext, query->servname);
 253                 time(&tnow);
 254                 printf(";; WHEN: %s", ctime(&tnow));
 255                 if (query->lookup->doing_xfr) {
 256                         printf(";; XFR size: %u records (messages %u, "
 257                                "bytes %" ISC_PRINT_QUADFORMAT "u)\n",
 258                                query->rr_count, query->msg_count,
 259                                query->byte_count);
 260                 } else {
 261                         printf(";; MSG SIZE  rcvd: %u\n", bytes);
 262
 263                 }
 264                 if (key != NULL) {
 265                         if (!validated)
 266                                 puts(";; WARNING -- Some TSIG could not "
 267                                      "be validated");
 268                 }
 269                 if ((key == NULL) && (keysecret[0] != 0)) {
 270                         puts(";; WARNING -- TSIG key was not used.");
 271                 }
 272                 puts("");
 273         } else if (query->lookup->identify && !short_form) {
 274                 diff = isc_time_microdiff(&now, &query->time_sent);
 275                 printf(";; Received %" ISC_PRINT_QUADFORMAT "u bytes "
 276                        "from %s(%s) in %d ms\n\n",
 277                        query->lookup->doing_xfr ?
 278                                 query->byte_count : (isc_uint64_t)bytes,
 279                        fromtext, query->servname,
 280                        (int)diff/1000);
 281         }
 282 }
 283
 284 /*
 285  * Callback from dighost.c to print that it is trying a server.
 286  * Not used in dig.
 287  * XXX print_trying
 288  */
 289 void
 290 trying(char *frm, dig_lookup_t *lookup) {
 291         UNUSED(frm);
 292         UNUSED(lookup);
 293 }
 294
 295 /*%
 296  * Internal print routine used to print short form replies.
 297  */
 298 static isc_result_t
 299 say_message(dns_rdata_t *rdata, dig_query_t *query, isc_buffer_t *buf) {
 300         isc_result_t result;
 301         isc_uint64_t diff;
 302         isc_time_t now;
 303         char store[sizeof("12345678901234567890")];
 304
 305         if (query->lookup->trace || query->lookup->ns_search_only) {
 306                 result = dns_rdatatype_totext(rdata->type, buf);
 307                 if (result != ISC_R_SUCCESS)
 308                         return (result);
 309                 ADD_STRING(buf, " ");
 310         }
 311         result = dns_rdata_totext(rdata, NULL, buf);
 312         if (result == ISC_R_NOSPACE)
 313                 return (result);
 314         check_result(result, "dns_rdata_totext");
 315         if (query->lookup->identify) {
 316                 TIME_NOW(&now);
 317                 diff = isc_time_microdiff(&now, &query->time_sent);
 318                 ADD_STRING(buf, " from server ");
 319                 ADD_STRING(buf, query->servname);
 320                 snprintf(store, 19, " in %d ms.", (int)diff/1000);
 321                 ADD_STRING(buf, store);
 322         }
 323         ADD_STRING(buf, "\n");
 324         return (ISC_R_SUCCESS);
 325 }
 326
 327 /*%
 328  * short_form message print handler.  Calls above say_message()
 329  */
 330 static isc_result_t
 331 short_answer(dns_message_t *msg, dns_messagetextflag_t flags,
 332              isc_buffer_t *buf, dig_query_t *query)
 333 {
 334         dns_name_t *name;
 335         dns_rdataset_t *rdataset;
 336         isc_result_t result, loopresult;
 337         dns_name_t empty_name;
 338         dns_rdata_t rdata = DNS_RDATA_INIT;
 339
 340         UNUSED(flags);
 341
 342         dns_name_init(&empty_name, NULL);
 343         result = dns_message_firstname(msg, DNS_SECTION_ANSWER);
 344         if (result == ISC_R_NOMORE)
 345                 return (ISC_R_SUCCESS);
 346         else if (result != ISC_R_SUCCESS)
 347                 return (result);
 348
 349         for (;;) {
 350                 name = NULL;
 351                 dns_message_currentname(msg, DNS_SECTION_ANSWER, &name);
 352
 353                 for (rdataset = ISC_LIST_HEAD(name->list);
 354                      rdataset != NULL;
 355                      rdataset = ISC_LIST_NEXT(rdataset, link)) {
 356                         loopresult = dns_rdataset_first(rdataset);
 357                         while (loopresult == ISC_R_SUCCESS) {
 358                                 dns_rdataset_current(rdataset, &rdata);
 359                                 result = say_message(&rdata, query,
 360                                                      buf);
 361                                 if (result == ISC_R_NOSPACE)
 362                                         return (result);
 363                                 check_result(result, "say_message");
 364                                 loopresult = dns_rdataset_next(rdataset);
 365                                 dns_rdata_reset(&rdata);
 366                         }
 367                 }
 368                 result = dns_message_nextname(msg, DNS_SECTION_ANSWER);
 369                 if (result == ISC_R_NOMORE)
 370                         break;
 371                 else if (result != ISC_R_SUCCESS)
 372                         return (result);
 373         }
 374
 375         return (ISC_R_SUCCESS);
 376 }
 377 #ifdef DIG_SIGCHASE
 378 isc_result_t
 379 printrdataset(dns_name_t *owner_name, dns_rdataset_t *rdataset,
 380               isc_buffer_t *target)
 381 {
 382         isc_result_t result;
 383         dns_master_style_t *style = NULL;
 384         unsigned int styleflags = 0;
 385
 386         if (rdataset == NULL || owner_name == NULL || target == NULL)
 387                 return(ISC_FALSE);
 388
 389         styleflags |= DNS_STYLEFLAG_REL_OWNER;
 390         if (nottl)
 391                 styleflags |= DNS_STYLEFLAG_NO_TTL;
 392         if (noclass)
 393                 styleflags |= DNS_STYLEFLAG_NO_CLASS;
 394         if (multiline) {
 395                 styleflags |= DNS_STYLEFLAG_OMIT_OWNER;
 396                 styleflags |= DNS_STYLEFLAG_OMIT_CLASS;
 397                 styleflags |= DNS_STYLEFLAG_REL_DATA;
 398                 styleflags |= DNS_STYLEFLAG_OMIT_TTL;
 399                 styleflags |= DNS_STYLEFLAG_TTL;
 400                 styleflags |= DNS_STYLEFLAG_MULTILINE;
 401                 styleflags |= DNS_STYLEFLAG_COMMENT;
 402         }
 403         if (multiline || (nottl && noclass))
 404                 result = dns_master_stylecreate(&style, styleflags,
 405                                                 24, 24, 24, 32, 80, 8, mctx);
 406         else if (nottl || noclass)
 407                 result = dns_master_stylecreate(&style, styleflags,
 408                                                 24, 24, 32, 40, 80, 8, mctx);
 409         else
 410                 result = dns_master_stylecreate(&style, styleflags,
 411                                                 24, 32, 40, 48, 80, 8, mctx);
 412         check_result(result, "dns_master_stylecreate");
 413
 414         result = dns_master_rdatasettotext(owner_name, rdataset, style, target);
 415
 416         if (style != NULL)
 417                 dns_master_styledestroy(&style, mctx);
 418
 419         return(result);
 420 }
 421 #endif
 422
 423 /*
 424  * Callback from dighost.c to print the reply from a server
 425  */
 426 isc_result_t
 427 printmessage(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers) {
 428         isc_result_t result;
 429         dns_messagetextflag_t flags;
 430         isc_buffer_t *buf = NULL;
 431         unsigned int len = OUTPUTBUF;
 432         dns_master_style_t *style = NULL;
 433         unsigned int styleflags = 0;
 434
 435         styleflags |= DNS_STYLEFLAG_REL_OWNER;
 436         if (nottl)
 437                 styleflags |= DNS_STYLEFLAG_NO_TTL;
 438         if (noclass)
 439                 styleflags |= DNS_STYLEFLAG_NO_CLASS;
 440         if (multiline) {
 441                 styleflags |= DNS_STYLEFLAG_OMIT_OWNER;
 442                 styleflags |= DNS_STYLEFLAG_OMIT_CLASS;
 443                 styleflags |= DNS_STYLEFLAG_REL_DATA;
 444                 styleflags |= DNS_STYLEFLAG_OMIT_TTL;
 445                 styleflags |= DNS_STYLEFLAG_TTL;
 446                 styleflags |= DNS_STYLEFLAG_MULTILINE;
 447                 styleflags |= DNS_STYLEFLAG_COMMENT;
 448         }
 449         if (multiline || (nottl && noclass))
 450                 result = dns_master_stylecreate(&style, styleflags,
 451                                                 24, 24, 24, 32, 80, 8, mctx);
 452         else if (nottl || noclass)
 453                 result = dns_master_stylecreate(&style, styleflags,
 454                                                 24, 24, 32, 40, 80, 8, mctx);
 455         else
 456                 result = dns_master_stylecreate(&style, styleflags,
 457                                                 24, 32, 40, 48, 80, 8, mctx);
 458         check_result(result, "dns_master_stylecreate");
 459
 460         if (query->lookup->cmdline[0] != 0) {
 461                 if (!short_form)
 462                         fputs(query->lookup->cmdline, stdout);
 463                 query->lookup->cmdline[0]=0;
 464         }
 465         debug("printmessage(%s %s %s)", headers ? "headers" : "noheaders",
 466               query->lookup->comments ? "comments" : "nocomments",
 467               short_form ? "short_form" : "long_form");
 468
 469         flags = 0;
 470         if (!headers) {
 471                 flags |= DNS_MESSAGETEXTFLAG_NOHEADERS;
 472                 flags |= DNS_MESSAGETEXTFLAG_NOCOMMENTS;
 473         }
 474         if (!query->lookup->comments)
 475                 flags |= DNS_MESSAGETEXTFLAG_NOCOMMENTS;
 476
 477         result = ISC_R_SUCCESS;
 478
 479         result = isc_buffer_allocate(mctx, &buf, len);
 480         check_result(result, "isc_buffer_allocate");
 481
 482         if (query->lookup->comments && !short_form) {
 483                 if (query->lookup->cmdline[0] != 0)
 484                         printf("; %s\n", query->lookup->cmdline);
 485                 if (msg == query->lookup->sendmsg)
 486                         printf(";; Sending:\n");
 487                 else
 488                         printf(";; Got answer:\n");
 489
 490                 if (headers) {
 491                         printf(";; ->>HEADER<<- opcode: %s, status: %s, "
 492                                "id: %u\n",
 493                                opcodetext[msg->opcode],
 494                                rcode_totext(msg->rcode),
 495                                msg->id);
 496                         printf(";; flags:");
 497                         if ((msg->flags & DNS_MESSAGEFLAG_QR) != 0)
 498                                 printf(" qr");
 499                         if ((msg->flags & DNS_MESSAGEFLAG_AA) != 0)
 500                                 printf(" aa");
 501                         if ((msg->flags & DNS_MESSAGEFLAG_TC) != 0)
 502                                 printf(" tc");
 503                         if ((msg->flags & DNS_MESSAGEFLAG_RD) != 0)
 504                                 printf(" rd");
 505                         if ((msg->flags & DNS_MESSAGEFLAG_RA) != 0)
 506                                 printf(" ra");
 507                         if ((msg->flags & DNS_MESSAGEFLAG_AD) != 0)
 508                                 printf(" ad");
 509                         if ((msg->flags & DNS_MESSAGEFLAG_CD) != 0)
 510                                 printf(" cd");
 511                         if ((msg->flags & 0x0040U) != 0)
 512                                 printf("; MBZ: 0x4");
 513
 514                         printf("; QUERY: %u, ANSWER: %u, "
 515                                "AUTHORITY: %u, ADDITIONAL: %u\n",
 516                                msg->counts[DNS_SECTION_QUESTION],
 517                                msg->counts[DNS_SECTION_ANSWER],
 518                                msg->counts[DNS_SECTION_AUTHORITY],
 519                                msg->counts[DNS_SECTION_ADDITIONAL]);
 520
 521                         if (msg != query->lookup->sendmsg &&
 522                             (msg->flags & DNS_MESSAGEFLAG_RD) != 0 &&
 523                             (msg->flags & DNS_MESSAGEFLAG_RA) == 0)
 524                                 printf(";; WARNING: recursion requested "
 525                                        "but not available\n");
 526                 }
 527                 if (msg != query->lookup->sendmsg && extrabytes != 0U)
 528                         printf(";; WARNING: Messages has %u extra byte%s at "
 529                                "end\n", extrabytes, extrabytes != 0 ? "s" : "");
 530         }
 531
 532 repopulate_buffer:
 533
 534         if (query->lookup->comments && headers && !short_form) {
 535                 result = dns_message_pseudosectiontotext(msg,
 536                          DNS_PSEUDOSECTION_OPT,
 537                          style, flags, buf);
 538                 if (result == ISC_R_NOSPACE) {
 539 buftoosmall:
 540                         len += OUTPUTBUF;
 541                         isc_buffer_free(&buf);
 542                         result = isc_buffer_allocate(mctx, &buf, len);
 543                         if (result == ISC_R_SUCCESS)
 544                                 goto repopulate_buffer;
 545                         else
 546                                 goto cleanup;
 547                 }
 548                 check_result(result,
 549                      "dns_message_pseudosectiontotext");
 550         }
 551
 552         if (query->lookup->section_question && headers) {
 553                 if (!short_form) {
 554                         result = dns_message_sectiontotext(msg,
 555                                                        DNS_SECTION_QUESTION,
 556                                                        style, flags, buf);
 557                         if (result == ISC_R_NOSPACE)
 558                                 goto buftoosmall;
 559                         check_result(result, "dns_message_sectiontotext");
 560                 }
 561         }
 562         if (query->lookup->section_answer) {
 563                 if (!short_form) {
 564                         result = dns_message_sectiontotext(msg,
 565                                                        DNS_SECTION_ANSWER,
 566                                                        style, flags, buf);
 567                         if (result == ISC_R_NOSPACE)
 568                                 goto buftoosmall;
 569                         check_result(result, "dns_message_sectiontotext");
 570                 } else {
 571                         result = short_answer(msg, flags, buf, query);
 572                         if (result == ISC_R_NOSPACE)
 573                                 goto buftoosmall;
 574                         check_result(result, "short_answer");
 575                 }
 576         }
 577         if (query->lookup->section_authority) {
 578                 if (!short_form) {
 579                         result = dns_message_sectiontotext(msg,
 580                                                        DNS_SECTION_AUTHORITY,
 581                                                        style, flags, buf);
 582                         if (result == ISC_R_NOSPACE)
 583                                 goto buftoosmall;
 584                         check_result(result, "dns_message_sectiontotext");
 585                 }
 586         }
 587         if (query->lookup->section_additional) {
 588                 if (!short_form) {
 589                         result = dns_message_sectiontotext(msg,
 590                                                       DNS_SECTION_ADDITIONAL,
 591                                                       style, flags, buf);
 592                         if (result == ISC_R_NOSPACE)
 593                                 goto buftoosmall;
 594                         check_result(result, "dns_message_sectiontotext");
 595                         /*
 596                          * Only print the signature on the first record.
 597                          */
 598                         if (headers) {
 599                                 result = dns_message_pseudosectiontotext(
 600                                                    msg,
 601                                                    DNS_PSEUDOSECTION_TSIG,
 602                                                    style, flags, buf);
 603                                 if (result == ISC_R_NOSPACE)
 604                                         goto buftoosmall;
 605                                 check_result(result,
 606                                           "dns_message_pseudosectiontotext");
 607                                 result = dns_message_pseudosectiontotext(
 608                                                    msg,
 609                                                    DNS_PSEUDOSECTION_SIG0,
 610                                                    style, flags, buf);
 611                                 if (result == ISC_R_NOSPACE)
 612                                         goto buftoosmall;
 613                                 check_result(result,
 614                                            "dns_message_pseudosectiontotext");
 615                         }
 616                 }
 617         }
 618
 619         if (headers && query->lookup->comments && !short_form)
 620                 printf("\n");
 621
 622         printf("%.*s", (int)isc_buffer_usedlength(buf),
 623                (char *)isc_buffer_base(buf));
 624         isc_buffer_free(&buf);
 625
 626 cleanup:
 627         if (style != NULL)
 628                 dns_master_styledestroy(&style, mctx);
 629         return (result);
 630 }
 631
 632 /*%
 633  * print the greeting message when the program first starts up.
 634  */
 635 static void
 636 printgreeting(int argc, char **argv, dig_lookup_t *lookup) {
 637         int i;
 638         int remaining;
 639         static isc_boolean_t first = ISC_TRUE;
 640         char append[MXNAME];
 641
 642         if (printcmd) {
 643                 lookup->cmdline[sizeof(lookup->cmdline) - 1] = 0;
 644                 snprintf(lookup->cmdline, sizeof(lookup->cmdline),
 645                          "%s; <<>> DiG " VERSION " <<>>",
 646                          first?"\n":"");
 647                 i = 1;
 648                 while (i < argc) {
 649                         snprintf(append, sizeof(append), " %s", argv[i++]);
 650                         remaining = sizeof(lookup->cmdline) -
 651                                     strlen(lookup->cmdline) - 1;
 652                         strncat(lookup->cmdline, append, remaining);
 653                 }
 654                 remaining = sizeof(lookup->cmdline) -
 655                             strlen(lookup->cmdline) - 1;
 656                 strncat(lookup->cmdline, "\n", remaining);
 657                 if (first && addresscount != 0) {
 658                         snprintf(append, sizeof(append),
 659                                  "; (%d server%s found)\n",
 660                                  addresscount,
 661                                  addresscount > 1 ? "s" : "");
 662                         remaining = sizeof(lookup->cmdline) -
 663                                     strlen(lookup->cmdline) - 1;
 664                         strncat(lookup->cmdline, append, remaining);
 665                 }
 666                 if (first) {
 667                         snprintf(append, sizeof(append),
 668                                  ";; global options:%s%s\n",
 669                                  short_form ? " +short" : "",
 670                                  printcmd ? " +cmd" : "");
 671                         first = ISC_FALSE;
 672                         remaining = sizeof(lookup->cmdline) -
 673                                     strlen(lookup->cmdline) - 1;
 674                         strncat(lookup->cmdline, append, remaining);
 675                 }
 676         }
 677 }
 678
 679 /*%
 680  * We're not using isc_commandline_parse() here since the command line
 681  * syntax of dig is quite a bit different from that which can be described
 682  * by that routine.
 683  * XXX doc options
 684  */
 685
 686 static void
 687 plus_option(char *option, isc_boolean_t is_batchfile,
 688             dig_lookup_t *lookup)
 689 {
 690         isc_result_t result;
 691         char option_store[256];
 692         char *cmd, *value, *ptr;
 693         isc_uint32_t num;
 694         isc_boolean_t state = ISC_TRUE;
 695 #ifdef DIG_SIGCHASE
 696         size_t n;
 697 #endif
 698
 699         strncpy(option_store, option, sizeof(option_store));
 700         option_store[sizeof(option_store)-1]=0;
 701         ptr = option_store;
 702         cmd = next_token(&ptr,"=");
 703         if (cmd == NULL) {
 704                 printf(";; Invalid option %s\n", option_store);
 705                 return;
 706         }
 707         value = ptr;
 708         if (strncasecmp(cmd, "no", 2)==0) {
 709                 cmd += 2;
 710                 state = ISC_FALSE;
 711         }
 712
 713 #define FULLCHECK(A) \
 714         do { \
 715                 size_t _l = strlen(cmd); \
 716                 if (_l >= sizeof(A) || strncasecmp(cmd, A, _l) != 0) \
 717                         goto invalid_option; \
 718         } while (0)
 719 #define FULLCHECK2(A, B) \
 720         do { \
 721                 size_t _l = strlen(cmd); \
 722                 if ((_l >= sizeof(A) || strncasecmp(cmd, A, _l) != 0) && \
 723                     (_l >= sizeof(B) || strncasecmp(cmd, B, _l) != 0)) \
 724                         goto invalid_option; \
 725         } while (0)
 726
 727         switch (cmd[0]) {
 728         case 'a':
 729                 switch (cmd[1]) {
 730                 case 'a': /* aaonly / aaflag */
 731                         FULLCHECK2("aaonly", "aaflag");
 732                         lookup->aaonly = state;
 733                         break;
 734                 case 'd':
 735                         switch (cmd[2]) {
 736                         case 'd': /* additional */
 737                                 FULLCHECK("additional");
 738                                 lookup->section_additional = state;
 739                                 break;
 740                         case 'f': /* adflag */
 741                         case '\0': /* +ad is a synonym for +adflag */
 742                                 FULLCHECK("adflag");
 743                                 lookup->adflag = state;
 744                                 break;
 745                         default:
 746                                 goto invalid_option;
 747                         }
 748                         break;
 749                 case 'l': /* all */
 750                         FULLCHECK("all");
 751                         lookup->section_question = state;
 752                         lookup->section_authority = state;
 753                         lookup->section_answer = state;
 754                         lookup->section_additional = state;
 755                         lookup->comments = state;
 756                         lookup->stats = state;
 757                         printcmd = state;
 758                         break;
 759                 case 'n': /* answer */
 760                         FULLCHECK("answer");
 761                         lookup->section_answer = state;
 762                         break;
 763                 case 'u': /* authority */
 764                         FULLCHECK("authority");
 765                         lookup->section_authority = state;
 766                         break;
 767                 default:
 768                         goto invalid_option;
 769                 }
 770                 break;
 771         case 'b':
 772                 switch (cmd[1]) {
 773                 case 'e':/* besteffort */
 774                         FULLCHECK("besteffort");
 775                         lookup->besteffort = state;
 776                         break;
 777                 case 'u':/* bufsize */
 778                         FULLCHECK("bufsize");
 779                         if (value == NULL)
 780                                 goto need_value;
 781                         if (!state)
 782                                 goto invalid_option;
 783                         result = parse_uint(&num, value, COMMSIZE,
 784                                             "buffer size");
 785                         if (result != ISC_R_SUCCESS)
 786                                 fatal("Couldn't parse buffer size");
 787                         lookup->udpsize = num;
 788                         break;
 789                 default:
 790                         goto invalid_option;
 791                 }
 792                 break;
 793         case 'c':
 794                 switch (cmd[1]) {
 795                 case 'd':/* cdflag */
 796                         switch (cmd[2]) {
 797                         case 'f': /* cdflag */
 798                         case '\0': /* +cd is a synonym for +cdflag */
 799                                 FULLCHECK("cdflag");
 800                                 lookup->cdflag = state;
 801                                 break;
 802                         default:
 803                                 goto invalid_option;
 804                         }
 805                         break;
 806                 case 'l': /* cl */
 807                         FULLCHECK("cl");
 808                         noclass = ISC_TF(!state);
 809                         break;
 810                 case 'm': /* cmd */
 811                         FULLCHECK("cmd");
 812                         printcmd = state;
 813                         break;
 814                 case 'o': /* comments */
 815                         FULLCHECK("comments");
 816                         lookup->comments = state;
 817                         if (lookup == default_lookup)
 818                                 pluscomm = state;
 819                         break;
 820                 default:
 821                         goto invalid_option;
 822                 }
 823                 break;
 824         case 'd':
 825                 switch (cmd[1]) {
 826                 case 'e': /* defname */
 827                         FULLCHECK("defname");
 828                         if (!lookup->trace) {
 829                                 usesearch = state;
 830                         }
 831                         break;
 832                 case 'n': /* dnssec */
 833                         FULLCHECK("dnssec");
 834                         if (state && lookup->edns == -1)
 835                                 lookup->edns = 0;
 836                         lookup->dnssec = state;
 837                         break;
 838                 case 'o': /* domain */
 839                         FULLCHECK("domain");
 840                         if (value == NULL)
 841                                 goto need_value;
 842                         if (!state)
 843                                 goto invalid_option;
 844                         strncpy(domainopt, value, sizeof(domainopt));
 845                         domainopt[sizeof(domainopt)-1] = '\0';
 846                         break;
 847                 default:
 848                         goto invalid_option;
 849                 }
 850                 break;
 851         case 'e':
 852                 FULLCHECK("edns");
 853                 if (!state) {
 854                         lookup->edns = -1;
 855                         break;
 856                 }
 857                 if (value == NULL)
 858                         goto need_value;
 859                 result = parse_uint(&num, value, 255, "edns");
 860                 if (result != ISC_R_SUCCESS)
 861                         fatal("Couldn't parse edns");
 862                 lookup->edns = num;
 863                 break;
 864         case 'f': /* fail */
 865                 FULLCHECK("fail");
 866                 lookup->servfail_stops = state;
 867                 break;
 868         case 'i':
 869                 switch (cmd[1]) {
 870                 case 'd': /* identify */
 871                         FULLCHECK("identify");
 872                         lookup->identify = state;
 873                         break;
 874                 case 'g': /* ignore */
 875                 default: /* Inherits default for compatibility */
 876                         FULLCHECK("ignore");
 877                         lookup->ignore = ISC_TRUE;
 878                 }
 879                 break;
 880         case 'm': /* multiline */
 881                 FULLCHECK("multiline");
 882                 multiline = state;
 883                 break;
 884         case 'n':
 885                 switch (cmd[1]) {
 886                 case 'd': /* ndots */
 887                         FULLCHECK("ndots");
 888                         if (value == NULL)
 889                                 goto need_value;
 890                         if (!state)
 891                                 goto invalid_option;
 892                         result = parse_uint(&num, value, MAXNDOTS, "ndots");
 893                         if (result != ISC_R_SUCCESS)
 894                                 fatal("Couldn't parse ndots");
 895                         ndots = num;
 896                         break;
 897                 case 's':
 898                         switch (cmd[2]) {
 899                         case 'i': /* nsid */
 900                                 FULLCHECK("nsid");
 901                                 if (state && lookup->edns == -1)
 902                                         lookup->edns = 0;
 903                                 lookup->nsid = state;
 904                                 break;
 905                         case 's': /* nssearch */
 906                                 FULLCHECK("nssearch");
 907                                 lookup->ns_search_only = state;
 908                                 if (state) {
 909                                         lookup->trace_root = ISC_TRUE;
 910                                         lookup->recurse = ISC_TRUE;
 911                                         lookup->identify = ISC_TRUE;
 912                                         lookup->stats = ISC_FALSE;
 913                                         lookup->comments = ISC_FALSE;
 914                                         lookup->section_additional = ISC_FALSE;
 915                                         lookup->section_authority = ISC_FALSE;
 916                                         lookup->section_question = ISC_FALSE;
 917                                         lookup->rdtype = dns_rdatatype_ns;
 918                                         lookup->rdtypeset = ISC_TRUE;
 919                                         short_form = ISC_TRUE;
 920                                 }
 921                                 break;
 922                         default:
 923                                 goto invalid_option;
 924                         }
 925                         break;
 926                 default:
 927                         goto invalid_option;
 928                 }
 929                 break;
 930         case 'q':
 931                 switch (cmd[1]) {
 932                 case 'r': /* qr */
 933                         FULLCHECK("qr");
 934                         qr = state;
 935                         break;
 936                 case 'u': /* question */
 937                         FULLCHECK("question");
 938                         lookup->section_question = state;
 939                         if (lookup == default_lookup)
 940                                 plusquest = state;
 941                         break;
 942                 default:
 943                         goto invalid_option;
 944                 }
 945                 break;
 946         case 'r':
 947                 switch (cmd[1]) {
 948                 case 'e':
 949                         switch (cmd[2]) {
 950                         case 'c': /* recurse */
 951                                 FULLCHECK("recurse");
 952                                 lookup->recurse = state;
 953                                 break;
 954                         case 't': /* retry / retries */
 955                                 FULLCHECK2("retry", "retries");
 956                                 if (value == NULL)
 957                                         goto need_value;
 958                                 if (!state)
 959                                         goto invalid_option;
 960                                 result = parse_uint(&lookup->retries, value,
 961                                                     MAXTRIES - 1, "retries");
 962                                 if (result != ISC_R_SUCCESS)
 963                                         fatal("Couldn't parse retries");
 964                                 lookup->retries++;
 965                                 break;
 966                         default:
 967                                 goto invalid_option;
 968                         }
 969                         break;
 970                 default:
 971                         goto invalid_option;
 972                 }
 973                 break;
 974         case 's':
 975                 switch (cmd[1]) {
 976                 case 'e': /* search */
 977                         FULLCHECK("search");
 978                         if (!lookup->trace) {
 979                                 usesearch = state;
 980                         }
 981                         break;
 982                 case 'h':
 983                         if (cmd[2] != 'o')
 984                                 goto invalid_option;
 985                         switch (cmd[3]) {
 986                         case 'r': /* short */
 987                                 FULLCHECK("short");
 988                                 short_form = state;
 989                                 if (state) {
 990                                         printcmd = ISC_FALSE;
 991                                         lookup->section_additional = ISC_FALSE;
 992                                         lookup->section_answer = ISC_TRUE;
 993                                         lookup->section_authority = ISC_FALSE;
 994                                         lookup->section_question = ISC_FALSE;
 995                                         lookup->comments = ISC_FALSE;
 996                                         lookup->stats = ISC_FALSE;
 997                                 }
 998                                 break;
 999                         case 'w': /* showsearch */
1000                                 FULLCHECK("showsearch");
1001                                 if (!lookup->trace) {
1002                                         showsearch = state;
1003                                         usesearch = state;
1004                                 }
1005                                 break;
1006                         default:
1007                                 goto invalid_option;
1008                         }
1009                         break;
1010 #ifdef DIG_SIGCHASE
1011                 case 'i': /* sigchase */
1012                         FULLCHECK("sigchase");
1013                         lookup->sigchase = state;
1014                         if (lookup->sigchase)
1015                                 lookup->dnssec = ISC_TRUE;
1016                         break;
1017 #endif
1018                 case 't': /* stats */
1019                         FULLCHECK("stats");
1020                         lookup->stats = state;
1021                         break;
1022                 default:
1023                         goto invalid_option;
1024                 }
1025                 break;
1026         case 't':
1027                 switch (cmd[1]) {
1028                 case 'c': /* tcp */
1029                         FULLCHECK("tcp");
1030                         if (!is_batchfile)
1031                                 lookup->tcp_mode = state;
1032                         break;
1033                 case 'i': /* timeout */
1034                         FULLCHECK("timeout");
1035                         if (value == NULL)
1036                                 goto need_value;
1037                         if (!state)
1038                                 goto invalid_option;
1039                         result = parse_uint(&timeout, value, MAXTIMEOUT,
1040                                             "timeout");
1041                         if (result != ISC_R_SUCCESS)
1042                                 fatal("Couldn't parse timeout");
1043                         if (timeout == 0)
1044                                 timeout = 1;
1045                         break;
1046 #if DIG_SIGCHASE_TD
1047                 case 'o': /* topdown */
1048                         FULLCHECK("topdown");
1049                         lookup->do_topdown = state;
1050                         break;
1051 #endif
1052                 case 'r':
1053                         switch (cmd[2]) {
1054                         case 'a': /* trace */
1055                                 FULLCHECK("trace");
1056                                 lookup->trace = state;
1057                                 lookup->trace_root = state;
1058                                 if (state) {
1059                                         lookup->recurse = ISC_FALSE;
1060                                         lookup->identify = ISC_TRUE;
1061                                         lookup->comments = ISC_FALSE;
1062                                         lookup->stats = ISC_FALSE;
1063                                         lookup->section_additional = ISC_FALSE;
1064                                         lookup->section_authority = ISC_TRUE;
1065                                         lookup->section_question = ISC_FALSE;
1066                                         usesearch = ISC_FALSE;
1067                                 }
1068                                 break;
1069                         case 'i': /* tries */
1070                                 FULLCHECK("tries");
1071                                 if (value == NULL)
1072                                         goto need_value;
1073                                 if (!state)
1074                                         goto invalid_option;
1075                                 result = parse_uint(&lookup->retries, value,
1076                                                     MAXTRIES, "tries");
1077                                 if (result != ISC_R_SUCCESS)
1078                                         fatal("Couldn't parse tries");
1079                                 if (lookup->retries == 0)
1080                                         lookup->retries = 1;
1081                                 break;
1082 #ifdef DIG_SIGCHASE
1083                         case 'u': /* trusted-key */
1084                                 FULLCHECK("trusted-key");
1085                                 if (value == NULL)
1086                                         goto need_value;
1087                                 if (!state)
1088                                         goto invalid_option;
1089                                 n = strlcpy(trustedkey, ptr,
1090                                             sizeof(trustedkey));
1091                                 if (n >= sizeof(trustedkey))
1092                                         fatal("trusted key too large");
1093                                 break;
1094 #endif
1095                         default:
1096                                 goto invalid_option;
1097                         }
1098                         break;
1099                 case 't': /* ttlid */
1100                         FULLCHECK("ttlid");
1101                         nottl = ISC_TF(!state);
1102                         break;
1103                 default:
1104                         goto invalid_option;
1105                 }
1106                 break;
1107         case 'v':
1108                 FULLCHECK("vc");
1109                 if (!is_batchfile)
1110                         lookup->tcp_mode = state;
1111                 break;
1112         default:
1113         invalid_option:
1114         need_value:
1115                 fprintf(stderr, "Invalid option: +%s\n",
1116                          option);
1117                 usage();
1118         }
1119         return;
1120 }
1121
1122 /*%
1123  * #ISC_TRUE returned if value was used
1124  */
1125 static const char *single_dash_opts = "46dhimnv";
1126 static const char *dash_opts = "46bcdfhikmnptvyx";
1127 static isc_boolean_t
1128 dash_option(char *option, char *next, dig_lookup_t **lookup,
1129             isc_boolean_t *open_type_class, isc_boolean_t *need_clone,
1130             isc_boolean_t config_only, int argc, char **argv,
1131             isc_boolean_t *firstarg)
1132 {
1133         char opt, *value, *ptr, *ptr2, *ptr3;
1134         isc_result_t result;
1135         isc_boolean_t value_from_next;
1136         isc_textregion_t tr;
1137         dns_rdatatype_t rdtype;
1138         dns_rdataclass_t rdclass;
1139         char textname[MXNAME];
1140         struct in_addr in4;
1141         struct in6_addr in6;
1142         in_port_t srcport;
1143         char *hash, *cmd;
1144         isc_uint32_t num;
1145
1146         while (strpbrk(option, single_dash_opts) == &option[0]) {
1147                 /*
1148                  * Since the -[46dhimnv] options do not take an argument,
1149                  * account for them (in any number and/or combination)
1150                  * if they appear as the first character(s) of a q-opt.
1151                  */
1152                 opt = option[0];
1153                 switch (opt) {
1154                 case '4':
1155                         if (have_ipv4) {
1156                                 isc_net_disableipv6();
1157                                 have_ipv6 = ISC_FALSE;
1158                         } else {
1159                                 fatal("can't find IPv4 networking");
1160                                 /* NOTREACHED */
1161                                 return (ISC_FALSE);
1162                         }
1163                         break;
1164                 case '6':
1165                         if (have_ipv6) {
1166                                 isc_net_disableipv4();
1167                                 have_ipv4 = ISC_FALSE;
1168                         } else {
1169                                 fatal("can't find IPv6 networking");
1170                                 /* NOTREACHED */
1171                                 return (ISC_FALSE);
1172                         }
1173                         break;
1174                 case 'd':
1175                         ptr = strpbrk(&option[1], dash_opts);
1176                         if (ptr != &option[1]) {
1177                                 cmd = option;
1178                                 FULLCHECK("debug");
1179                                 debugging = ISC_TRUE;
1180                                 return (ISC_FALSE);
1181                         } else
1182                                 debugging = ISC_TRUE;
1183                         break;
1184                 case 'h':
1185                         help();
1186                         exit(0);
1187                         break;
1188                 case 'i':
1189                         ip6_int = ISC_TRUE;
1190                         break;
1191                 case 'm': /* memdebug */
1192                         /* memdebug is handled in preparse_args() */
1193                         break;
1194                 case 'n':
1195                         /* deprecated */
1196                         break;
1197                 case 'v':
1198                         version();
1199                         exit(0);
1200                         break;
1201                 }
1202                 if (strlen(option) > 1U)
1203                         option = &option[1];
1204                 else
1205                         return (ISC_FALSE);
1206         }
1207         opt = option[0];
1208         if (strlen(option) > 1U) {
1209                 value_from_next = ISC_FALSE;
1210                 value = &option[1];
1211         } else {
1212                 value_from_next = ISC_TRUE;
1213                 value = next;
1214         }
1215         if (value == NULL)
1216                 goto invalid_option;
1217         switch (opt) {
1218         case 'b':
1219                 hash = strchr(value, '#');
1220                 if (hash != NULL) {
1221                         result = parse_uint(&num, hash + 1, MAXPORT,
1222                                             "port number");
1223                         if (result != ISC_R_SUCCESS)
1224                                 fatal("Couldn't parse port number");
1225                         srcport = num;
1226                         *hash = '\0';
1227                 } else
1228                         srcport = 0;
1229                 if (have_ipv6 && inet_pton(AF_INET6, value, &in6) == 1) {
1230                         isc_sockaddr_fromin6(&bind_address, &in6, srcport);
1231                         isc_net_disableipv4();
1232                 } else if (have_ipv4 && inet_pton(AF_INET, value, &in4) == 1) {
1233                         isc_sockaddr_fromin(&bind_address, &in4, srcport);
1234                         isc_net_disableipv6();
1235                 } else {
1236                         if (hash != NULL)
1237                                 *hash = '#';
1238                         fatal("invalid address %s", value);
1239                 }
1240                 if (hash != NULL)
1241                         *hash = '#';
1242                 specified_source = ISC_TRUE;
1243                 return (value_from_next);
1244         case 'c':
1245                 if ((*lookup)->rdclassset) {
1246                         fprintf(stderr, ";; Warning, extra class option\n");
1247                 }
1248                 *open_type_class = ISC_FALSE;
1249                 tr.base = value;
1250                 tr.length = strlen(value);
1251                 result = dns_rdataclass_fromtext(&rdclass,
1252                                                  (isc_textregion_t *)&tr);
1253                 if (result == ISC_R_SUCCESS) {
1254                         (*lookup)->rdclass = rdclass;
1255                         (*lookup)->rdclassset = ISC_TRUE;
1256                 } else
1257                         fprintf(stderr, ";; Warning, ignoring "
1258                                 "invalid class %s\n",
1259                                 value);
1260                 return (value_from_next);
1261         case 'f':
1262                 batchname = value;
1263                 return (value_from_next);
1264         case 'k':
1265                 strncpy(keyfile, value, sizeof(keyfile));
1266                 keyfile[sizeof(keyfile)-1]=0;
1267                 return (value_from_next);
1268         case 'p':
1269                 result = parse_uint(&num, value, MAXPORT, "port number");
1270                 if (result != ISC_R_SUCCESS)
1271                         fatal("Couldn't parse port number");
1272                 port = num;
1273                 return (value_from_next);
1274         case 'q':
1275                 if (!config_only) {
1276                         if (*need_clone)
1277                                 (*lookup) = clone_lookup(default_lookup,
1278                                                          ISC_TRUE);
1279                         *need_clone = ISC_TRUE;
1280                         strncpy((*lookup)->textname, value,
1281                                 sizeof((*lookup)->textname));
1282                         (*lookup)->textname[sizeof((*lookup)->textname)-1]=0;
1283                         (*lookup)->trace_root = ISC_TF((*lookup)->trace  ||
1284                                                      (*lookup)->ns_search_only);
1285                         (*lookup)->new_search = ISC_TRUE;
1286                         if (*firstarg) {
1287                                 printgreeting(argc, argv, *lookup);
1288                                 *firstarg = ISC_FALSE;
1289                         }
1290                         ISC_LIST_APPEND(lookup_list, (*lookup), link);
1291                         debug("looking up %s", (*lookup)->textname);
1292                 }
1293                 return (value_from_next);
1294         case 't':
1295                 *open_type_class = ISC_FALSE;
1296                 if (strncasecmp(value, "ixfr=", 5) == 0) {
1297                         rdtype = dns_rdatatype_ixfr;
1298                         result = ISC_R_SUCCESS;
1299                 } else {
1300                         tr.base = value;
1301                         tr.length = strlen(value);
1302                         result = dns_rdatatype_fromtext(&rdtype,
1303                                                 (isc_textregion_t *)&tr);
1304                         if (result == ISC_R_SUCCESS &&
1305                             rdtype == dns_rdatatype_ixfr) {
1306                                 result = DNS_R_UNKNOWN;
1307                         }
1308                 }
1309                 if (result == ISC_R_SUCCESS) {
1310                         if ((*lookup)->rdtypeset) {
1311                                 fprintf(stderr, ";; Warning, "
1312                                                 "extra type option\n");
1313                         }
1314                         if (rdtype == dns_rdatatype_ixfr) {
1315                                 isc_uint32_t serial;
1316                                 (*lookup)->rdtype = dns_rdatatype_ixfr;
1317                                 (*lookup)->rdtypeset = ISC_TRUE;
1318                                 result = parse_uint(&serial, &value[5],
1319                                            MAXSERIAL, "serial number");
1320                                 if (result != ISC_R_SUCCESS)
1321                                         fatal("Couldn't parse serial number");
1322                                 (*lookup)->ixfr_serial = serial;
1323                                 (*lookup)->section_question = plusquest;
1324                                 (*lookup)->comments = pluscomm;
1325                                 (*lookup)->tcp_mode = ISC_TRUE;
1326                         } else {
1327                                 (*lookup)->rdtype = rdtype;
1328                                 (*lookup)->rdtypeset = ISC_TRUE;
1329                                 if (rdtype == dns_rdatatype_axfr) {
1330                                         (*lookup)->section_question = plusquest;
1331                                         (*lookup)->comments = pluscomm;
1332                                 }
1333                                 (*lookup)->ixfr_serial = ISC_FALSE;
1334                         }
1335                 } else
1336                         fprintf(stderr, ";; Warning, ignoring "
1337                                  "invalid type %s\n",
1338                                  value);
1339                 return (value_from_next);
1340         case 'y':
1341                 ptr = next_token(&value,":");   /* hmac type or name */
1342                 if (ptr == NULL) {
1343                         usage();
1344                 }
1345                 ptr2 = next_token(&value, ":"); /* name or secret */
1346                 if (ptr2 == NULL)
1347                         usage();
1348                 ptr3 = next_token(&value,":"); /* secret or NULL */
1349                 if (ptr3 != NULL) {
1350                         parse_hmac(ptr);
1351                         ptr = ptr2;
1352                         ptr2 = ptr3;
1353                 } else  {
1354                         hmacname = DNS_TSIG_HMACMD5_NAME;
1355                         digestbits = 0;
1356                 }
1357                 strncpy(keynametext, ptr, sizeof(keynametext));
1358                 keynametext[sizeof(keynametext)-1]=0;
1359                 strncpy(keysecret, ptr2, sizeof(keysecret));
1360                 keysecret[sizeof(keysecret)-1]=0;
1361                 return (value_from_next);
1362         case 'x':
1363                 if (*need_clone)
1364                         *lookup = clone_lookup(default_lookup, ISC_TRUE);
1365                 *need_clone = ISC_TRUE;
1366                 if (get_reverse(textname, sizeof(textname), value,
1367                                 ip6_int, ISC_FALSE) == ISC_R_SUCCESS) {
1368                         strncpy((*lookup)->textname, textname,
1369                                 sizeof((*lookup)->textname));
1370                         debug("looking up %s", (*lookup)->textname);
1371                         (*lookup)->trace_root = ISC_TF((*lookup)->trace  ||
1372                                                 (*lookup)->ns_search_only);
1373                         (*lookup)->ip6_int = ip6_int;
1374                         if (!(*lookup)->rdtypeset)
1375                                 (*lookup)->rdtype = dns_rdatatype_ptr;
1376                         if (!(*lookup)->rdclassset)
1377                                 (*lookup)->rdclass = dns_rdataclass_in;
1378                         (*lookup)->new_search = ISC_TRUE;
1379                         if (*firstarg) {
1380                                 printgreeting(argc, argv, *lookup);
1381                                 *firstarg = ISC_FALSE;
1382                         }
1383                         ISC_LIST_APPEND(lookup_list, *lookup, link);
1384                 } else {
1385                         fprintf(stderr, "Invalid IP address %s\n", value);
1386                         exit(1);
1387                 }
1388                 return (value_from_next);
1389         invalid_option:
1390         default:
1391                 fprintf(stderr, "Invalid option: -%s\n", option);
1392                 usage();
1393         }
1394         /* NOTREACHED */
1395         return (ISC_FALSE);
1396 }
1397
1398 /*%
1399  * Because we may be trying to do memory allocation recording, we're going
1400  * to need to parse the arguments for the -m *before* we start the main
1401  * argument parsing routine.
1402  *
1403  * I'd prefer not to have to do this, but I am not quite sure how else to
1404  * fix the problem.  Argument parsing in dig involves memory allocation
1405  * by its nature, so it can't be done in the main argument parser.
1406  */
1407 static void
1408 preparse_args(int argc, char **argv) {
1409         int rc;
1410         char **rv;
1411         char *option;
1412
1413         rc = argc;
1414         rv = argv;
1415         for (rc--, rv++; rc > 0; rc--, rv++) {
1416                 if (rv[0][0] != '-')
1417                         continue;
1418                 option = &rv[0][1];
1419                 while (strpbrk(option, single_dash_opts) == &option[0]) {
1420                         if (option[0] == 'm') {
1421                                 memdebugging = ISC_TRUE;
1422                                 isc_mem_debugging = ISC_MEM_DEBUGTRACE |
1423                                         ISC_MEM_DEBUGRECORD;
1424                                 return;
1425                         }
1426                         option = &option[1];
1427                 }
1428         }
1429 }
1430
1431 static void
1432 getaddresses(dig_lookup_t *lookup, const char *host) {
1433         isc_result_t result;
1434         isc_sockaddr_t sockaddrs[DIG_MAX_ADDRESSES];
1435         isc_netaddr_t netaddr;
1436         int count, i;
1437         dig_server_t *srv;
1438         char tmp[ISC_NETADDR_FORMATSIZE];
1439
1440         result = bind9_getaddresses(host, 0, sockaddrs,
1441                                     DIG_MAX_ADDRESSES, &count);
1442         if (result != ISC_R_SUCCESS)
1443         fatal("couldn't get address for '%s': %s",
1444               host, isc_result_totext(result));
1445
1446         for (i = 0; i < count; i++) {
1447                 isc_netaddr_fromsockaddr(&netaddr, &sockaddrs[i]);
1448                 isc_netaddr_format(&netaddr, tmp, sizeof(tmp));
1449                 srv = make_server(tmp, host);
1450                 ISC_LIST_APPEND(lookup->my_server_list, srv, link);
1451         }
1452         addresscount = count;
1453 }
1454
1455 static void
1456 parse_args(isc_boolean_t is_batchfile, isc_boolean_t config_only,
1457            int argc, char **argv) {
1458         isc_result_t result;
1459         isc_textregion_t tr;
1460         isc_boolean_t firstarg = ISC_TRUE;
1461         dig_lookup_t *lookup = NULL;
1462         dns_rdatatype_t rdtype;
1463         dns_rdataclass_t rdclass;
1464         isc_boolean_t open_type_class = ISC_TRUE;
1465         char batchline[MXNAME];
1466         int bargc;
1467         char *bargv[64];
1468         int rc;
1469         char **rv;
1470 #ifndef NOPOSIX
1471         char *homedir;
1472         char rcfile[256];
1473 #endif
1474         char *input;
1475         int i;
1476         isc_boolean_t need_clone = ISC_TRUE;
1477
1478         /*
1479          * The semantics for parsing the args is a bit complex; if
1480          * we don't have a host yet, make the arg apply globally,
1481          * otherwise make it apply to the latest host.  This is
1482          * a bit different than the previous versions, but should
1483          * form a consistent user interface.
1484          *
1485          * First, create a "default lookup" which won't actually be used
1486          * anywhere, except for cloning into new lookups
1487          */
1488
1489         debug("parse_args()");
1490         if (!is_batchfile) {
1491                 debug("making new lookup");
1492                 default_lookup = make_empty_lookup();
1493
1494 #ifndef NOPOSIX
1495                 /*
1496                  * Treat ${HOME}/.digrc as a special batchfile
1497                  */
1498                 INSIST(batchfp == NULL);
1499                 homedir = getenv("HOME");
1500                 if (homedir != NULL) {
1501                         unsigned int n;
1502                         n = snprintf(rcfile, sizeof(rcfile), "%s/.digrc",
1503                                      homedir);
1504                         if (n < sizeof(rcfile))
1505                                 batchfp = fopen(rcfile, "r");
1506                 }
1507                 if (batchfp != NULL) {
1508                         while (fgets(batchline, sizeof(batchline),
1509                                      batchfp) != 0) {
1510                                 debug("config line %s", batchline);
1511                                 bargc = 1;
1512                                 input = batchline;
1513                                 bargv[bargc] = next_token(&input, " \t\r\n");
1514                                 while ((bargv[bargc] != NULL) &&
1515                                        (bargc < 62)) {
1516                                         bargc++;
1517                                         bargv[bargc] =
1518                                                 next_token(&input, " \t\r\n");
1519                                 }
1520
1521                                 bargv[0] = argv[0];
1522                                 argv0 = argv[0];
1523
1524                                 for(i = 0; i < bargc; i++)
1525                                         debug(".digrc argv %d: %s",
1526                                               i, bargv[i]);
1527                                 parse_args(ISC_TRUE, ISC_TRUE, bargc,
1528                                            (char **)bargv);
1529                         }
1530                         fclose(batchfp);
1531                 }
1532 #endif
1533         }
1534
1535         if (is_batchfile && !config_only) {
1536                 /* Processing '-f batchfile'. */
1537                 lookup = clone_lookup(default_lookup, ISC_TRUE);
1538                 need_clone = ISC_FALSE;
1539         } else
1540                 lookup = default_lookup;
1541
1542         rc = argc;
1543         rv = argv;
1544         for (rc--, rv++; rc > 0; rc--, rv++) {
1545                 debug("main parsing %s", rv[0]);
1546                 if (strncmp(rv[0], "%", 1) == 0)
1547                         break;
1548                 if (strncmp(rv[0], "@", 1) == 0) {
1549                         getaddresses(lookup, &rv[0][1]);
1550                 } else if (rv[0][0] == '+') {
1551                         plus_option(&rv[0][1], is_batchfile,
1552                                     lookup);
1553                 } else if (rv[0][0] == '-') {
1554                         if (rc <= 1) {
1555                                 if (dash_option(&rv[0][1], NULL,
1556                                                 &lookup, &open_type_class,
1557                                                 &need_clone, config_only,
1558                                                 argc, argv, &firstarg)) {
1559                                         rc--;
1560                                         rv++;
1561                                 }
1562                         } else {
1563                                 if (dash_option(&rv[0][1], rv[1],
1564                                                 &lookup, &open_type_class,
1565                                                 &need_clone, config_only,
1566                                                 argc, argv, &firstarg)) {
1567                                         rc--;
1568                                         rv++;
1569                                 }
1570                         }
1571                 } else {
1572                         /*
1573                          * Anything which isn't an option
1574                          */
1575                         if (open_type_class) {
1576                                 if (strncasecmp(rv[0], "ixfr=", 5) == 0) {
1577                                         rdtype = dns_rdatatype_ixfr;
1578                                         result = ISC_R_SUCCESS;
1579                                 } else {
1580                                         tr.base = rv[0];
1581                                         tr.length = strlen(rv[0]);
1582                                         result = dns_rdatatype_fromtext(&rdtype,
1583                                                 (isc_textregion_t *)&tr);
1584                                         if (result == ISC_R_SUCCESS &&
1585                                             rdtype == dns_rdatatype_ixfr) {
1586                                                 result = DNS_R_UNKNOWN;
1587                                                 fprintf(stderr, ";; Warning, "
1588                                                         "ixfr requires a "
1589                                                         "serial number\n");
1590                                                 continue;
1591                                         }
1592                                 }
1593                                 if (result == ISC_R_SUCCESS) {
1594                                         if (lookup->rdtypeset) {
1595                                                 fprintf(stderr, ";; Warning, "
1596                                                         "extra type option\n");
1597                                         }
1598                                         if (rdtype == dns_rdatatype_ixfr) {
1599                                                 isc_uint32_t serial;
1600                                                 lookup->rdtype =
1601                                                         dns_rdatatype_ixfr;
1602                                                 lookup->rdtypeset = ISC_TRUE;
1603                                                 result = parse_uint(&serial,
1604                                                                     &rv[0][5],
1605                                                                     MAXSERIAL,
1606                                                               "serial number");
1607                                                 if (result != ISC_R_SUCCESS)
1608                                                         fatal("Couldn't parse "
1609                                                               "serial number");
1610                                                 lookup->ixfr_serial = serial;
1611                                                 lookup->section_question =
1612                                                         plusquest;
1613                                                 lookup->comments = pluscomm;
1614                                                 lookup->tcp_mode = ISC_TRUE;
1615                                         } else {
1616                                                 lookup->rdtype = rdtype;
1617                                                 lookup->rdtypeset = ISC_TRUE;
1618                                                 if (rdtype ==
1619                                                     dns_rdatatype_axfr) {
1620                                                     lookup->section_question =
1621                                                                 plusquest;
1622                                                     lookup->comments = pluscomm;
1623                                                 }
1624                                                 lookup->ixfr_serial = ISC_FALSE;
1625                                         }
1626                                         continue;
1627                                 }
1628                                 result = dns_rdataclass_fromtext(&rdclass,
1629                                                      (isc_textregion_t *)&tr);
1630                                 if (result == ISC_R_SUCCESS) {
1631                                         if (lookup->rdclassset) {
1632                                                 fprintf(stderr, ";; Warning, "
1633                                                         "extra class option\n");
1634                                         }
1635                                         lookup->rdclass = rdclass;
1636                                         lookup->rdclassset = ISC_TRUE;
1637                                         continue;
1638                                 }
1639                         }
1640
1641                         if (!config_only) {
1642                                 if (need_clone)
1643                                         lookup = clone_lookup(default_lookup,
1644                                                                       ISC_TRUE);
1645                                 need_clone = ISC_TRUE;
1646                                 strncpy(lookup->textname, rv[0],
1647                                         sizeof(lookup->textname));
1648                                 lookup->textname[sizeof(lookup->textname)-1]=0;
1649                                 lookup->trace_root = ISC_TF(lookup->trace  ||
1650                                                      lookup->ns_search_only);
1651                                 lookup->new_search = ISC_TRUE;
1652                                 if (firstarg) {
1653                                         printgreeting(argc, argv, lookup);
1654                                         firstarg = ISC_FALSE;
1655                                 }
1656                                 ISC_LIST_APPEND(lookup_list, lookup, link);
1657                                 debug("looking up %s", lookup->textname);
1658                         }
1659                         /* XXX Error message */
1660                 }
1661         }
1662
1663         /*
1664          * If we have a batchfile, seed the lookup list with the
1665          * first entry, then trust the callback in dighost_shutdown
1666          * to get the rest
1667          */
1668         if ((batchname != NULL) && !(is_batchfile)) {
1669                 if (strcmp(batchname, "-") == 0)
1670                         batchfp = stdin;
1671                 else
1672                         batchfp = fopen(batchname, "r");
1673                 if (batchfp == NULL) {
1674                         perror(batchname);
1675                         if (exitcode < 8)
1676                                 exitcode = 8;
1677                         fatal("couldn't open specified batch file");
1678                 }
1679                 /* XXX Remove code dup from shutdown code */
1680         next_line:
1681                 if (fgets(batchline, sizeof(batchline), batchfp) != 0) {
1682                         bargc = 1;
1683                         debug("batch line %s", batchline);
1684                         if (batchline[0] == '\r' || batchline[0] == '\n'
1685                             || batchline[0] == '#' || batchline[0] == ';')
1686                                 goto next_line;
1687                         input = batchline;
1688                         bargv[bargc] = next_token(&input, " \t\r\n");
1689                         while ((bargv[bargc] != NULL) && (bargc < 14)) {
1690                                 bargc++;
1691                                 bargv[bargc] = next_token(&input, " \t\r\n");
1692                         }
1693
1694                         bargv[0] = argv[0];
1695                         argv0 = argv[0];
1696
1697                         for(i = 0; i < bargc; i++)
1698                                 debug("batch argv %d: %s", i, bargv[i]);
1699                         parse_args(ISC_TRUE, ISC_FALSE, bargc, (char **)bargv);
1700                         return;
1701                 }
1702                 return;
1703         }
1704         /*
1705          * If no lookup specified, search for root
1706          */
1707         if ((lookup_list.head == NULL) && !config_only) {
1708                 if (need_clone)
1709                         lookup = clone_lookup(default_lookup, ISC_TRUE);
1710                 need_clone = ISC_TRUE;
1711                 lookup->trace_root = ISC_TF(lookup->trace ||
1712                                             lookup->ns_search_only);
1713                 lookup->new_search = ISC_TRUE;
1714                 strcpy(lookup->textname, ".");
1715                 lookup->rdtype = dns_rdatatype_ns;
1716                 lookup->rdtypeset = ISC_TRUE;
1717                 if (firstarg) {
1718                         printgreeting(argc, argv, lookup);
1719                         firstarg = ISC_FALSE;
1720                 }
1721                 ISC_LIST_APPEND(lookup_list, lookup, link);
1722         }
1723         if (!need_clone)
1724                 destroy_lookup(lookup);
1725 }
1726
1727 /*
1728  * Callback from dighost.c to allow program-specific shutdown code.
1729  * Here, we're possibly reading from a batch file, then shutting down
1730  * for real if there's nothing in the batch file to read.
1731  */
1732 void
1733 dighost_shutdown(void) {
1734         char batchline[MXNAME];
1735         int bargc;
1736         char *bargv[16];
1737         char *input;
1738         int i;
1739
1740         if (batchname == NULL) {
1741                 isc_app_shutdown();
1742                 return;
1743         }
1744
1745         fflush(stdout);
1746         if (feof(batchfp)) {
1747                 batchname = NULL;
1748                 isc_app_shutdown();
1749                 if (batchfp != stdin)
1750                         fclose(batchfp);
1751                 return;
1752         }
1753
1754         if (fgets(batchline, sizeof(batchline), batchfp) != 0) {
1755                 debug("batch line %s", batchline);
1756                 bargc = 1;
1757                 input = batchline;
1758                 bargv[bargc] = next_token(&input, " \t\r\n");
1759                 while ((bargv[bargc] != NULL) && (bargc < 14)) {
1760                         bargc++;
1761                         bargv[bargc] = next_token(&input, " \t\r\n");
1762                 }
1763
1764                 bargv[0] = argv0;
1765
1766                 for(i = 0; i < bargc; i++)
1767                         debug("batch argv %d: %s", i, bargv[i]);
1768                 parse_args(ISC_TRUE, ISC_FALSE, bargc, (char **)bargv);
1769                 start_lookup();
1770         } else {
1771                 batchname = NULL;
1772                 if (batchfp != stdin)
1773                         fclose(batchfp);
1774                 isc_app_shutdown();
1775                 return;
1776         }
1777 }
1778
1779 /*% Main processing routine for dig */
1780 int
1781 main(int argc, char **argv) {
1782         isc_result_t result;
1783
1784         ISC_LIST_INIT(lookup_list);
1785         ISC_LIST_INIT(server_list);
1786         ISC_LIST_INIT(search_list);
1787
1788         debug("main()");
1789         preparse_args(argc, argv);
1790         progname = argv[0];
1791         result = isc_app_start();
1792         check_result(result, "isc_app_start");
1793         setup_libs();
1794         parse_args(ISC_FALSE, ISC_FALSE, argc, argv);
1795         setup_system();
1796         if (domainopt[0] != '\0') {
1797                 set_search_domain(domainopt);
1798                 usesearch = ISC_TRUE;
1799         }
1800         result = isc_app_onrun(mctx, global_task, onrun_callback, NULL);
1801         check_result(result, "isc_app_onrun");
1802         isc_app_run();
1803         destroy_lookup(default_lookup);
1804         if (batchname != NULL) {
1805                 if (batchfp != stdin)
1806                         fclose(batchfp);
1807                 batchname = NULL;
1808         }
1809 #ifdef DIG_SIGCHASE
1810         clean_trustedkey();
1811 #endif
1812         cancel_all();
1813         destroy_libs();
1814         isc_app_finish();
1815         return (exitcode);
1816 }