source3/libsmb/namequery.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    name query routines
   4    Copyright (C) Andrew Tridgell 1994-1998
   5    Copyright (C) Jeremy Allison 2007.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "../lib/util/tevent_ntstatus.h"
  23 #include "libads/sitename_cache.h"
  24 #include "libads/dns.h"
  25 #include "../libcli/netlogon/netlogon.h"
  26 #include "lib/async_req/async_sock.h"
  27 #include "libsmb/nmblib.h"
  28
  29 /* nmbd.c sets this to True. */
  30 bool global_in_nmbd = False;
  31
  32 /****************************
  33  * SERVER AFFINITY ROUTINES *
  34  ****************************/
  35
  36  /* Server affinity is the concept of preferring the last domain
  37     controller with whom you had a successful conversation */
  38
  39 /****************************************************************************
  40 ****************************************************************************/
  41 #define SAFKEY_FMT      "SAF/DOMAIN/%s"
  42 #define SAF_TTL         900
  43 #define SAFJOINKEY_FMT  "SAFJOIN/DOMAIN/%s"
  44 #define SAFJOIN_TTL     3600
  45
  46 static char *saf_key(const char *domain)
  47 {
  48         char *keystr;
  49
  50         asprintf_strupper_m(&keystr, SAFKEY_FMT, domain);
  51
  52         return keystr;
  53 }
  54
  55 static char *saf_join_key(const char *domain)
  56 {
  57         char *keystr;
  58
  59         asprintf_strupper_m(&keystr, SAFJOINKEY_FMT, domain);
  60
  61         return keystr;
  62 }
  63
  64 /****************************************************************************
  65 ****************************************************************************/
  66
  67 bool saf_store( const char *domain, const char *servername )
  68 {
  69         char *key;
  70         time_t expire;
  71         bool ret = False;
  72
  73         if ( !domain || !servername ) {
  74                 DEBUG(2,("saf_store: "
  75                         "Refusing to store empty domain or servername!\n"));
  76                 return False;
  77         }
  78
  79         if ( (strlen(domain) == 0) || (strlen(servername) == 0) ) {
  80                 DEBUG(0,("saf_store: "
  81                         "refusing to store 0 length domain or servername!\n"));
  82                 return False;
  83         }
  84
  85         key = saf_key( domain );
  86         expire = time( NULL ) + lp_parm_int(-1, "saf","ttl", SAF_TTL);
  87
  88         DEBUG(10,("saf_store: domain = [%s], server = [%s], expire = [%u]\n",
  89                 domain, servername, (unsigned int)expire ));
  90
  91         ret = gencache_set( key, servername, expire );
  92
  93         SAFE_FREE( key );
  94
  95         return ret;
  96 }
  97
  98 bool saf_join_store( const char *domain, const char *servername )
  99 {
 100         char *key;
 101         time_t expire;
 102         bool ret = False;
 103
 104         if ( !domain || !servername ) {
 105                 DEBUG(2,("saf_join_store: Refusing to store empty domain or servername!\n"));
 106                 return False;
 107         }
 108
 109         if ( (strlen(domain) == 0) || (strlen(servername) == 0) ) {
 110                 DEBUG(0,("saf_join_store: refusing to store 0 length domain or servername!\n"));
 111                 return False;
 112         }
 113
 114         key = saf_join_key( domain );
 115         expire = time( NULL ) + lp_parm_int(-1, "saf","join ttl", SAFJOIN_TTL);
 116
 117         DEBUG(10,("saf_join_store: domain = [%s], server = [%s], expire = [%u]\n",
 118                 domain, servername, (unsigned int)expire ));
 119
 120         ret = gencache_set( key, servername, expire );
 121
 122         SAFE_FREE( key );
 123
 124         return ret;
 125 }
 126
 127 bool saf_delete( const char *domain )
 128 {
 129         char *key;
 130         bool ret = False;
 131
 132         if ( !domain ) {
 133                 DEBUG(2,("saf_delete: Refusing to delete empty domain\n"));
 134                 return False;
 135         }
 136
 137         key = saf_join_key(domain);
 138         ret = gencache_del(key);
 139         SAFE_FREE(key);
 140
 141         if (ret) {
 142                 DEBUG(10,("saf_delete[join]: domain = [%s]\n", domain ));
 143         }
 144
 145         key = saf_key(domain);
 146         ret = gencache_del(key);
 147         SAFE_FREE(key);
 148
 149         if (ret) {
 150                 DEBUG(10,("saf_delete: domain = [%s]\n", domain ));
 151         }
 152
 153         return ret;
 154 }
 155
 156 /****************************************************************************
 157 ****************************************************************************/
 158
 159 char *saf_fetch( const char *domain )
 160 {
 161         char *server = NULL;
 162         time_t timeout;
 163         bool ret = False;
 164         char *key = NULL;
 165
 166         if ( !domain || strlen(domain) == 0) {
 167                 DEBUG(2,("saf_fetch: Empty domain name!\n"));
 168                 return NULL;
 169         }
 170
 171         key = saf_join_key( domain );
 172
 173         ret = gencache_get( key, &server, &timeout );
 174
 175         SAFE_FREE( key );
 176
 177         if ( ret ) {
 178                 DEBUG(5,("saf_fetch[join]: Returning \"%s\" for \"%s\" domain\n",
 179                         server, domain ));
 180                 return server;
 181         }
 182
 183         key = saf_key( domain );
 184
 185         ret = gencache_get( key, &server, &timeout );
 186
 187         SAFE_FREE( key );
 188
 189         if ( !ret ) {
 190                 DEBUG(5,("saf_fetch: failed to find server for \"%s\" domain\n",
 191                                         domain ));
 192         } else {
 193                 DEBUG(5,("saf_fetch: Returning \"%s\" for \"%s\" domain\n",
 194                         server, domain ));
 195         }
 196
 197         return server;
 198 }
 199
 200 /****************************************************************************
 201  Generate a random trn_id.
 202 ****************************************************************************/
 203
 204 static int generate_trn_id(void)
 205 {
 206         uint16 id;
 207
 208         generate_random_buffer((uint8 *)&id, sizeof(id));
 209
 210         return id % (unsigned)0x7FFF;
 211 }
 212
 213 /****************************************************************************
 214  Parse a node status response into an array of structures.
 215 ****************************************************************************/
 216
 217 static struct node_status *parse_node_status(TALLOC_CTX *mem_ctx, char *p,
 218                                 int *num_names,
 219                                 struct node_status_extra *extra)
 220 {
 221         struct node_status *ret;
 222         int i;
 223
 224         *num_names = CVAL(p,0);
 225
 226         if (*num_names == 0)
 227                 return NULL;
 228
 229         ret = TALLOC_ARRAY(mem_ctx, struct node_status,*num_names);
 230         if (!ret)
 231                 return NULL;
 232
 233         p++;
 234         for (i=0;i< *num_names;i++) {
 235                 StrnCpy(ret[i].name,p,15);
 236                 trim_char(ret[i].name,'\0',' ');
 237                 ret[i].type = CVAL(p,15);
 238                 ret[i].flags = p[16];
 239                 p += 18;
 240                 DEBUG(10, ("%s#%02x: flags = 0x%02x\n", ret[i].name,
 241                            ret[i].type, ret[i].flags));
 242         }
 243         /*
 244          * Also, pick up the MAC address ...
 245          */
 246         if (extra) {
 247                 memcpy(&extra->mac_addr, p, 6); /* Fill in the mac addr */
 248         }
 249         return ret;
 250 }
 251
 252 struct sock_packet_read_state {
 253         struct tevent_context *ev;
 254         enum packet_type type;
 255         int trn_id;
 256
 257         struct nb_packet_reader *reader;
 258         struct tevent_req *reader_req;
 259
 260         int sock;
 261         struct tevent_req *socket_req;
 262         uint8_t buf[1024];
 263         struct sockaddr_storage addr;
 264         socklen_t addr_len;
 265
 266         bool (*validator)(struct packet_struct *p,
 267                           void *private_data);
 268         void *private_data;
 269
 270         struct packet_struct *packet;
 271 };
 272
 273 static int sock_packet_read_state_destructor(struct sock_packet_read_state *s);
 274 static void sock_packet_read_got_packet(struct tevent_req *subreq);
 275 static void sock_packet_read_got_socket(struct tevent_req *subreq);
 276
 277 static struct tevent_req *sock_packet_read_send(
 278         TALLOC_CTX *mem_ctx,
 279         struct tevent_context *ev,
 280         int sock, /* dgram socket */
 281         struct nb_packet_reader *reader,
 282         enum packet_type type,
 283         int trn_id,
 284         bool (*validator)(struct packet_struct *p, void *private_data),
 285         void *private_data)
 286 {
 287         struct tevent_req *req;
 288         struct sock_packet_read_state *state;
 289
 290         req = tevent_req_create(mem_ctx, &state,
 291                                 struct sock_packet_read_state);
 292         if (req == NULL) {
 293                 return NULL;
 294         }
 295         talloc_set_destructor(state, sock_packet_read_state_destructor);
 296         state->ev = ev;
 297         state->reader = reader;
 298         state->sock = sock;
 299         state->type = type;
 300         state->trn_id = trn_id;
 301         state->validator = validator;
 302         state->private_data = private_data;
 303
 304         if (reader != NULL) {
 305                 state->reader_req = nb_packet_read_send(state, ev, reader);
 306                 if (tevent_req_nomem(state->reader_req, req)) {
 307                         return tevent_req_post(req, ev);
 308                 }
 309                 tevent_req_set_callback(
 310                         state->reader_req, sock_packet_read_got_packet, req);
 311         }
 312
 313         state->addr_len = sizeof(state->addr);
 314         state->socket_req = recvfrom_send(state, ev, sock,
 315                                           state->buf, sizeof(state->buf), 0,
 316                                           &state->addr, &state->addr_len);
 317         if (tevent_req_nomem(state->socket_req, req)) {
 318                 return tevent_req_post(req, ev);
 319         }
 320         tevent_req_set_callback(state->socket_req, sock_packet_read_got_socket,
 321                                 req);
 322
 323         return req;
 324 }
 325
 326 static int sock_packet_read_state_destructor(struct sock_packet_read_state *s)
 327 {
 328         if (s->packet != NULL) {
 329                 free_packet(s->packet);
 330                 s->packet = NULL;
 331         }
 332         return 0;
 333 }
 334
 335 static void sock_packet_read_got_packet(struct tevent_req *subreq)
 336 {
 337         struct tevent_req *req = tevent_req_callback_data(
 338                 subreq, struct tevent_req);
 339         struct sock_packet_read_state *state = tevent_req_data(
 340                 req, struct sock_packet_read_state);
 341         NTSTATUS status;
 342
 343         status = nb_packet_read_recv(subreq, &state->packet);
 344
 345         TALLOC_FREE(state->reader_req);
 346
 347         if (!NT_STATUS_IS_OK(status)) {
 348                 if (state->socket_req != NULL) {
 349                         /*
 350                          * Still waiting for socket
 351                          */
 352                         return;
 353                 }
 354                 /*
 355                  * Both socket and packet reader failed
 356                  */
 357                 tevent_req_nterror(req, status);
 358                 return;
 359         }
 360
 361         if ((state->validator != NULL) &&
 362             !state->validator(state->packet, state->private_data)) {
 363                 DEBUG(10, ("validator failed\n"));
 364
 365                 free_packet(state->packet);
 366                 state->packet = NULL;
 367
 368                 state->reader_req = nb_packet_read_send(state, state->ev,
 369                                                         state->reader);
 370                 if (tevent_req_nomem(state->reader_req, req)) {
 371                         return;
 372                 }
 373                 tevent_req_set_callback(
 374                         state->reader_req, sock_packet_read_got_packet, req);
 375                 return;
 376         }
 377
 378         TALLOC_FREE(state->socket_req);
 379         tevent_req_done(req);
 380 }
 381
 382 static void sock_packet_read_got_socket(struct tevent_req *subreq)
 383 {
 384         struct tevent_req *req = tevent_req_callback_data(
 385                 subreq, struct tevent_req);
 386         struct sock_packet_read_state *state = tevent_req_data(
 387                 req, struct sock_packet_read_state);
 388         struct sockaddr_in *in_addr;
 389         ssize_t received;
 390         int err;
 391
 392         received = recvfrom_recv(subreq, &err);
 393
 394         TALLOC_FREE(state->socket_req);
 395
 396         if (received == -1) {
 397                 if (state->reader_req != NULL) {
 398                         /*
 399                          * Still waiting for reader
 400                          */
 401                         return;
 402                 }
 403                 /*
 404                  * Both socket and reader failed
 405                  */
 406                 tevent_req_nterror(req, map_nt_error_from_unix(err));
 407                 return;
 408         }
 409         if (state->addr.ss_family != AF_INET) {
 410                 goto retry;
 411         }
 412         in_addr = (struct sockaddr_in *)(void *)&state->addr;
 413
 414         state->packet = parse_packet((char *)state->buf, received, state->type,
 415                                      in_addr->sin_addr, in_addr->sin_port);
 416         if (state->packet == NULL) {
 417                 DEBUG(10, ("parse_packet failed\n"));
 418                 goto retry;
 419         }
 420         if ((state->trn_id != -1) &&
 421             (state->trn_id != packet_trn_id(state->packet))) {
 422                 DEBUG(10, ("Expected transaction id %d, got %d\n",
 423                            state->trn_id, packet_trn_id(state->packet)));
 424                 goto retry;
 425         }
 426
 427         if ((state->validator != NULL) &&
 428             !state->validator(state->packet, state->private_data)) {
 429                 DEBUG(10, ("validator failed\n"));
 430                 goto retry;
 431         }
 432
 433         tevent_req_done(req);
 434         return;
 435
 436 retry:
 437         if (state->packet != NULL) {
 438                 free_packet(state->packet);
 439                 state->packet = NULL;
 440         }
 441         state->socket_req = recvfrom_send(state, state->ev, state->sock,
 442                                           state->buf, sizeof(state->buf), 0,
 443                                           &state->addr, &state->addr_len);
 444         if (tevent_req_nomem(state->socket_req, req)) {
 445                 return;
 446         }
 447         tevent_req_set_callback(state->socket_req, sock_packet_read_got_socket,
 448                                 req);
 449 }
 450
 451 static NTSTATUS sock_packet_read_recv(struct tevent_req *req,
 452                                       struct packet_struct **ppacket)
 453 {
 454         struct sock_packet_read_state *state = tevent_req_data(
 455                 req, struct sock_packet_read_state);
 456         NTSTATUS status;
 457
 458         if (tevent_req_is_nterror(req, &status)) {
 459                 return status;
 460         }
 461         *ppacket = state->packet;
 462         state->packet = NULL;
 463         return NT_STATUS_OK;
 464 }
 465
 466 struct nb_trans_state {
 467         struct tevent_context *ev;
 468         int sock;
 469         struct nb_packet_reader *reader;
 470
 471         const struct sockaddr_storage *dst_addr;
 472         uint8_t *buf;
 473         size_t buflen;
 474         enum packet_type type;
 475         int trn_id;
 476
 477         bool (*validator)(struct packet_struct *p,
 478                           void *private_data);
 479         void *private_data;
 480
 481         struct packet_struct *packet;
 482 };
 483
 484 static int nb_trans_state_destructor(struct nb_trans_state *s);
 485 static void nb_trans_got_reader(struct tevent_req *subreq);
 486 static void nb_trans_done(struct tevent_req *subreq);
 487 static void nb_trans_sent(struct tevent_req *subreq);
 488 static void nb_trans_send_next(struct tevent_req *subreq);
 489
 490 static struct tevent_req *nb_trans_send(
 491         TALLOC_CTX *mem_ctx,
 492         struct tevent_context *ev,
 493         const struct sockaddr_storage *my_addr,
 494         const struct sockaddr_storage *dst_addr,
 495         bool bcast,
 496         uint8_t *buf, size_t buflen,
 497         enum packet_type type, int trn_id,
 498         bool (*validator)(struct packet_struct *p,
 499                           void *private_data),
 500         void *private_data)
 501 {
 502         struct tevent_req *req, *subreq;
 503         struct nb_trans_state *state;
 504
 505         req = tevent_req_create(mem_ctx, &state, struct nb_trans_state);
 506         if (req == NULL) {
 507                 return NULL;
 508         }
 509         talloc_set_destructor(state, nb_trans_state_destructor);
 510         state->ev = ev;
 511         state->dst_addr = dst_addr;
 512         state->buf = buf;
 513         state->buflen = buflen;
 514         state->type = type;
 515         state->trn_id = trn_id;
 516         state->validator = validator;
 517         state->private_data = private_data;
 518
 519         state->sock = open_socket_in(SOCK_DGRAM, 0, 3, my_addr, True);
 520         if (state->sock == -1) {
 521                 tevent_req_nterror(req, map_nt_error_from_unix(errno));
 522                 DEBUG(10, ("open_socket_in failed: %s\n", strerror(errno)));
 523                 return tevent_req_post(req, ev);
 524         }
 525
 526         if (bcast) {
 527                 set_socket_options(state->sock,"SO_BROADCAST");
 528         }
 529
 530         subreq = nb_packet_reader_send(state, ev, type, state->trn_id, NULL);
 531         if (tevent_req_nomem(subreq, req)) {
 532                 return tevent_req_post(req, ev);
 533         }
 534         tevent_req_set_callback(subreq, nb_trans_got_reader, req);
 535         return req;
 536 }
 537
 538 static int nb_trans_state_destructor(struct nb_trans_state *s)
 539 {
 540         if (s->sock != -1) {
 541                 close(s->sock);
 542                 s->sock = -1;
 543         }
 544         if (s->packet != NULL) {
 545                 free_packet(s->packet);
 546                 s->packet = NULL;
 547         }
 548         return 0;
 549 }
 550
 551 static void nb_trans_got_reader(struct tevent_req *subreq)
 552 {
 553         struct tevent_req *req = tevent_req_callback_data(
 554                 subreq, struct tevent_req);
 555         struct nb_trans_state *state = tevent_req_data(
 556                 req, struct nb_trans_state);
 557         NTSTATUS status;
 558
 559         status = nb_packet_reader_recv(subreq, state, &state->reader);
 560         TALLOC_FREE(subreq);
 561
 562         if (!NT_STATUS_IS_OK(status)) {
 563                 DEBUG(10, ("nmbd not around\n"));
 564                 state->reader = NULL;
 565         }
 566
 567         subreq = sock_packet_read_send(
 568                 state, state->ev, state->sock,
 569                 state->reader, state->type, state->trn_id,
 570                 state->validator, state->private_data);
 571         if (tevent_req_nomem(subreq, req)) {
 572                 return;
 573         }
 574         tevent_req_set_callback(subreq, nb_trans_done, req);
 575
 576         subreq = sendto_send(state, state->ev, state->sock,
 577                              state->buf, state->buflen, 0, state->dst_addr);
 578         if (tevent_req_nomem(subreq, req)) {
 579                 return;
 580         }
 581         tevent_req_set_callback(subreq, nb_trans_sent, req);
 582 }
 583
 584 static void nb_trans_sent(struct tevent_req *subreq)
 585 {
 586         struct tevent_req *req = tevent_req_callback_data(
 587                 subreq, struct tevent_req);
 588         struct nb_trans_state *state = tevent_req_data(
 589                 req, struct nb_trans_state);
 590         ssize_t sent;
 591         int err;
 592
 593         sent = sendto_recv(subreq, &err);
 594         TALLOC_FREE(subreq);
 595         if (sent == -1) {
 596                 DEBUG(10, ("sendto failed: %s\n", strerror(err)));
 597                 tevent_req_nterror(req, map_nt_error_from_unix(err));
 598                 return;
 599         }
 600         subreq = tevent_wakeup_send(state, state->ev,
 601                                     timeval_current_ofs(1, 0));
 602         if (tevent_req_nomem(subreq, req)) {
 603                 return;
 604         }
 605         tevent_req_set_callback(subreq, nb_trans_send_next, req);
 606 }
 607
 608 static void nb_trans_send_next(struct tevent_req *subreq)
 609 {
 610         struct tevent_req *req = tevent_req_callback_data(
 611                 subreq, struct tevent_req);
 612         struct nb_trans_state *state = tevent_req_data(
 613                 req, struct nb_trans_state);
 614         bool ret;
 615
 616         ret = tevent_wakeup_recv(subreq);
 617         TALLOC_FREE(subreq);
 618         if (!ret) {
 619                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 620                 return;
 621         }
 622         subreq = sendto_send(state, state->ev, state->sock,
 623                              state->buf, state->buflen, 0, state->dst_addr);
 624         if (tevent_req_nomem(subreq, req)) {
 625                 return;
 626         }
 627         tevent_req_set_callback(subreq, nb_trans_sent, req);
 628 }
 629
 630 static void nb_trans_done(struct tevent_req *subreq)
 631 {
 632         struct tevent_req *req = tevent_req_callback_data(
 633                 subreq, struct tevent_req);
 634         struct nb_trans_state *state = tevent_req_data(
 635                 req, struct nb_trans_state);
 636         NTSTATUS status;
 637
 638         status = sock_packet_read_recv(subreq, &state->packet);
 639         TALLOC_FREE(subreq);
 640         if (tevent_req_nterror(req, status)) {
 641                 return;
 642         }
 643         tevent_req_done(req);
 644 }
 645
 646 static NTSTATUS nb_trans_recv(struct tevent_req *req,
 647                               struct packet_struct **ppacket)
 648 {
 649         struct nb_trans_state *state = tevent_req_data(
 650                 req, struct nb_trans_state);
 651         NTSTATUS status;
 652
 653         if (tevent_req_is_nterror(req, &status)) {
 654                 return status;
 655         }
 656         *ppacket = state->packet;
 657         state->packet = NULL;
 658         return NT_STATUS_OK;
 659 }
 660
 661 /****************************************************************************
 662  Do a NBT node status query on an open socket and return an array of
 663  structures holding the returned names or NULL if the query failed.
 664 **************************************************************************/
 665
 666 struct node_status_query_state {
 667         struct sockaddr_storage my_addr;
 668         struct sockaddr_storage addr;
 669         uint8_t buf[1024];
 670         ssize_t buflen;
 671         struct packet_struct *packet;
 672 };
 673
 674 static int node_status_query_state_destructor(
 675         struct node_status_query_state *s);
 676 static bool node_status_query_validator(struct packet_struct *p,
 677                                         void *private_data);
 678 static void node_status_query_done(struct tevent_req *subreq);
 679
 680 struct tevent_req *node_status_query_send(TALLOC_CTX *mem_ctx,
 681                                           struct tevent_context *ev,
 682                                           struct nmb_name *name,
 683                                           const struct sockaddr_storage *addr)
 684 {
 685         struct tevent_req *req, *subreq;
 686         struct node_status_query_state *state;
 687         struct packet_struct p;
 688         struct nmb_packet *nmb = &p.packet.nmb;
 689         struct sockaddr_in *in_addr;
 690
 691         req = tevent_req_create(mem_ctx, &state,
 692                                 struct node_status_query_state);
 693         if (req == NULL) {
 694                 return NULL;
 695         }
 696         talloc_set_destructor(state, node_status_query_state_destructor);
 697
 698         if (addr->ss_family != AF_INET) {
 699                 /* Can't do node status to IPv6 */
 700                 tevent_req_nterror(req, NT_STATUS_INVALID_ADDRESS);
 701                 return tevent_req_post(req, ev);
 702         }
 703
 704         state->addr = *addr;
 705         in_addr = (struct sockaddr_in *)(void *)&state->addr;
 706         in_addr->sin_port = htons(NMB_PORT);
 707
 708         if (!interpret_string_addr(&state->my_addr, lp_socket_address(),
 709                                    AI_NUMERICHOST|AI_PASSIVE)) {
 710                 zero_sockaddr(&state->my_addr);
 711         }
 712
 713         ZERO_STRUCT(p);
 714         nmb->header.name_trn_id = generate_trn_id();
 715         nmb->header.opcode = 0;
 716         nmb->header.response = false;
 717         nmb->header.nm_flags.bcast = false;
 718         nmb->header.nm_flags.recursion_available = false;
 719         nmb->header.nm_flags.recursion_desired = false;
 720         nmb->header.nm_flags.trunc = false;
 721         nmb->header.nm_flags.authoritative = false;
 722         nmb->header.rcode = 0;
 723         nmb->header.qdcount = 1;
 724         nmb->header.ancount = 0;
 725         nmb->header.nscount = 0;
 726         nmb->header.arcount = 0;
 727         nmb->question.question_name = *name;
 728         nmb->question.question_type = 0x21;
 729         nmb->question.question_class = 0x1;
 730
 731         state->buflen = build_packet((char *)state->buf, sizeof(state->buf),
 732                                      &p);
 733         if (state->buflen == 0) {
 734                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 735                 DEBUG(10, ("build_packet failed\n"));
 736                 return tevent_req_post(req, ev);
 737         }
 738
 739         subreq = nb_trans_send(state, ev, &state->my_addr, &state->addr, false,
 740                                state->buf, state->buflen,
 741                                NMB_PACKET, nmb->header.name_trn_id,
 742                                node_status_query_validator, NULL);
 743         if (tevent_req_nomem(subreq, req)) {
 744                 DEBUG(10, ("nb_trans_send failed\n"));
 745                 return tevent_req_post(req, ev);
 746         }
 747         if (!tevent_req_set_endtime(req, ev, timeval_current_ofs(10, 0))) {
 748                 return tevent_req_post(req, ev);
 749         }
 750         tevent_req_set_callback(subreq, node_status_query_done, req);
 751         return req;
 752 }
 753
 754 static bool node_status_query_validator(struct packet_struct *p,
 755                                         void *private_data)
 756 {
 757         struct nmb_packet *nmb = &p->packet.nmb;
 758         debug_nmb_packet(p);
 759
 760         if (nmb->header.opcode != 0 ||
 761             nmb->header.nm_flags.bcast ||
 762             nmb->header.rcode ||
 763             !nmb->header.ancount ||
 764             nmb->answers->rr_type != 0x21) {
 765                 /*
 766                  * XXXX what do we do with this? could be a redirect,
 767                  * but we'll discard it for the moment
 768                  */
 769                 return false;
 770         }
 771         return true;
 772 }
 773
 774 static int node_status_query_state_destructor(
 775         struct node_status_query_state *s)
 776 {
 777         if (s->packet != NULL) {
 778                 free_packet(s->packet);
 779                 s->packet = NULL;
 780         }
 781         return 0;
 782 }
 783
 784 static void node_status_query_done(struct tevent_req *subreq)
 785 {
 786         struct tevent_req *req = tevent_req_callback_data(
 787                 subreq, struct tevent_req);
 788         struct node_status_query_state *state = tevent_req_data(
 789                 req, struct node_status_query_state);
 790         NTSTATUS status;
 791
 792         status = nb_trans_recv(subreq, &state->packet);
 793         TALLOC_FREE(subreq);
 794         if (tevent_req_nterror(req, status)) {
 795                 return;
 796         }
 797         tevent_req_done(req);
 798 }
 799
 800 NTSTATUS node_status_query_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 801                                 struct node_status **pnode_status,
 802                                 int *pnum_names,
 803                                 struct node_status_extra *extra)
 804 {
 805         struct node_status_query_state *state = tevent_req_data(
 806                 req, struct node_status_query_state);
 807         struct node_status *node_status;
 808         int num_names;
 809         NTSTATUS status;
 810
 811         if (tevent_req_is_nterror(req, &status)) {
 812                 return status;
 813         }
 814         node_status = parse_node_status(
 815                 mem_ctx, &state->packet->packet.nmb.answers->rdata[0],
 816                 &num_names, extra);
 817         if (node_status == NULL) {
 818                 return NT_STATUS_NO_MEMORY;
 819         }
 820         *pnode_status = node_status;
 821         *pnum_names = num_names;
 822         return NT_STATUS_OK;
 823 }
 824
 825 NTSTATUS node_status_query(TALLOC_CTX *mem_ctx, struct nmb_name *name,
 826                            const struct sockaddr_storage *addr,
 827                            struct node_status **pnode_status,
 828                            int *pnum_names,
 829                            struct node_status_extra *extra)
 830 {
 831         TALLOC_CTX *frame = talloc_stackframe();
 832         struct tevent_context *ev;
 833         struct tevent_req *req;
 834         NTSTATUS status = NT_STATUS_NO_MEMORY;
 835
 836         ev = tevent_context_init(frame);
 837         if (ev == NULL) {
 838                 goto fail;
 839         }
 840         req = node_status_query_send(ev, ev, name, addr);
 841         if (req == NULL) {
 842                 goto fail;
 843         }
 844         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 845                 goto fail;
 846         }
 847         status = node_status_query_recv(req, mem_ctx, pnode_status,
 848                                         pnum_names, extra);
 849  fail:
 850         TALLOC_FREE(frame);
 851         return status;
 852 }
 853
 854 /****************************************************************************
 855  Find the first type XX name in a node status reply - used for finding
 856  a servers name given its IP. Return the matched name in *name.
 857 **************************************************************************/
 858
 859 bool name_status_find(const char *q_name,
 860                         int q_type,
 861                         int type,
 862                         const struct sockaddr_storage *to_ss,
 863                         fstring name)
 864 {
 865         char addr[INET6_ADDRSTRLEN];
 866         struct sockaddr_storage ss;
 867         struct node_status *addrs = NULL;
 868         struct nmb_name nname;
 869         int count, i;
 870         bool result = false;
 871         NTSTATUS status;
 872
 873         if (lp_disable_netbios()) {
 874                 DEBUG(5,("name_status_find(%s#%02x): netbios is disabled\n",
 875                                         q_name, q_type));
 876                 return False;
 877         }
 878
 879         print_sockaddr(addr, sizeof(addr), to_ss);
 880
 881         DEBUG(10, ("name_status_find: looking up %s#%02x at %s\n", q_name,
 882                    q_type, addr));
 883
 884         /* Check the cache first. */
 885
 886         if (namecache_status_fetch(q_name, q_type, type, to_ss, name)) {
 887                 return True;
 888         }
 889
 890         if (to_ss->ss_family != AF_INET) {
 891                 /* Can't do node status to IPv6 */
 892                 return false;
 893         }
 894
 895         if (!interpret_string_addr(&ss, lp_socket_address(),
 896                                 AI_NUMERICHOST|AI_PASSIVE)) {
 897                 zero_sockaddr(&ss);
 898         }
 899
 900         /* W2K PDC's seem not to respond to '*'#0. JRA */
 901         make_nmb_name(&nname, q_name, q_type);
 902         status = node_status_query(talloc_tos(), &nname, to_ss,
 903                                    &addrs, &count, NULL);
 904         if (!NT_STATUS_IS_OK(status)) {
 905                 goto done;
 906         }
 907
 908         for (i=0;i<count;i++) {
 909                 /* Find first one of the requested type that's not a GROUP. */
 910                 if (addrs[i].type == type && ! (addrs[i].flags & 0x80))
 911                         break;
 912         }
 913         if (i == count)
 914                 goto done;
 915
 916         pull_ascii_nstring(name, sizeof(fstring), addrs[i].name);
 917
 918         /* Store the result in the cache. */
 919         /* but don't store an entry for 0x1c names here.  Here we have
 920            a single host and DOMAIN<0x1c> names should be a list of hosts */
 921
 922         if ( q_type != 0x1c ) {
 923                 namecache_status_store(q_name, q_type, type, to_ss, name);
 924         }
 925
 926         result = true;
 927
 928  done:
 929         TALLOC_FREE(addrs);
 930
 931         DEBUG(10, ("name_status_find: name %sfound", result ? "" : "not "));
 932
 933         if (result)
 934                 DEBUGADD(10, (", name %s ip address is %s", name, addr));
 935
 936         DEBUG(10, ("\n"));
 937
 938         return result;
 939 }
 940
 941 /*
 942   comparison function used by sort_addr_list
 943 */
 944
 945 static int addr_compare(const struct sockaddr_storage *ss1,
 946                         const struct sockaddr_storage *ss2)
 947 {
 948         int max_bits1=0, max_bits2=0;
 949         int num_interfaces = iface_count();
 950         int i;
 951
 952         /* Sort IPv4 addresses first. */
 953         if (ss1->ss_family != ss2->ss_family) {
 954                 if (ss2->ss_family == AF_INET) {
 955                         return 1;
 956                 } else {
 957                         return -1;
 958                 }
 959         }
 960
 961         /* Here we know both addresses are of the same
 962          * family. */
 963
 964         for (i=0;i<num_interfaces;i++) {
 965                 const struct sockaddr_storage *pss = iface_n_bcast(i);
 966                 unsigned char *p_ss1 = NULL;
 967                 unsigned char *p_ss2 = NULL;
 968                 unsigned char *p_if = NULL;
 969                 size_t len = 0;
 970                 int bits1, bits2;
 971
 972                 if (pss->ss_family != ss1->ss_family) {
 973                         /* Ignore interfaces of the wrong type. */
 974                         continue;
 975                 }
 976                 if (pss->ss_family == AF_INET) {
 977                         p_if = (unsigned char *)
 978                                 &((const struct sockaddr_in *)pss)->sin_addr;
 979                         p_ss1 = (unsigned char *)
 980                                 &((const struct sockaddr_in *)ss1)->sin_addr;
 981                         p_ss2 = (unsigned char *)
 982                                 &((const struct sockaddr_in *)ss2)->sin_addr;
 983                         len = 4;
 984                 }
 985 #if defined(HAVE_IPV6)
 986                 if (pss->ss_family == AF_INET6) {
 987                         p_if = (unsigned char *)
 988                                 &((const struct sockaddr_in6 *)pss)->sin6_addr;
 989                         p_ss1 = (unsigned char *)
 990                                 &((const struct sockaddr_in6 *)ss1)->sin6_addr;
 991                         p_ss2 = (unsigned char *)
 992                                 &((const struct sockaddr_in6 *)ss2)->sin6_addr;
 993                         len = 16;
 994                 }
 995 #endif
 996                 if (!p_ss1 || !p_ss2 || !p_if || len == 0) {
 997                         continue;
 998                 }
 999                 bits1 = matching_len_bits(p_ss1, p_if, len);
1000                 bits2 = matching_len_bits(p_ss2, p_if, len);
1001                 max_bits1 = MAX(bits1, max_bits1);
1002                 max_bits2 = MAX(bits2, max_bits2);
1003         }
1004
1005         /* Bias towards directly reachable IPs */
1006         if (iface_local((struct sockaddr *)ss1)) {
1007                 if (ss1->ss_family == AF_INET) {
1008                         max_bits1 += 32;
1009                 } else {
1010                         max_bits1 += 128;
1011                 }
1012         }
1013         if (iface_local((struct sockaddr *)ss2)) {
1014                 if (ss2->ss_family == AF_INET) {
1015                         max_bits2 += 32;
1016                 } else {
1017                         max_bits2 += 128;
1018                 }
1019         }
1020         return max_bits2 - max_bits1;
1021 }
1022
1023 /*******************************************************************
1024  compare 2 ldap IPs by nearness to our interfaces - used in qsort
1025 *******************************************************************/
1026
1027 int ip_service_compare(struct ip_service *ss1, struct ip_service *ss2)
1028 {
1029         int result;
1030
1031         if ((result = addr_compare(&ss1->ss, &ss2->ss)) != 0) {
1032                 return result;
1033         }
1034
1035         if (ss1->port > ss2->port) {
1036                 return 1;
1037         }
1038
1039         if (ss1->port < ss2->port) {
1040                 return -1;
1041         }
1042
1043         return 0;
1044 }
1045
1046 /*
1047   sort an IP list so that names that are close to one of our interfaces
1048   are at the top. This prevents the problem where a WINS server returns an IP
1049   that is not reachable from our subnet as the first match
1050 */
1051
1052 static void sort_addr_list(struct sockaddr_storage *sslist, int count)
1053 {
1054         if (count <= 1) {
1055                 return;
1056         }
1057
1058         TYPESAFE_QSORT(sslist, count, addr_compare);
1059 }
1060
1061 static void sort_service_list(struct ip_service *servlist, int count)
1062 {
1063         if (count <= 1) {
1064                 return;
1065         }
1066
1067         TYPESAFE_QSORT(servlist, count, ip_service_compare);
1068 }
1069
1070 /**********************************************************************
1071  Remove any duplicate address/port pairs in the list
1072  *********************************************************************/
1073
1074 static int remove_duplicate_addrs2(struct ip_service *iplist, int count )
1075 {
1076         int i, j;
1077
1078         DEBUG(10,("remove_duplicate_addrs2: "
1079                         "looking for duplicate address/port pairs\n"));
1080
1081         /* one loop to remove duplicates */
1082         for ( i=0; i<count; i++ ) {
1083                 if ( is_zero_addr(&iplist[i].ss)) {
1084                         continue;
1085                 }
1086
1087                 for ( j=i+1; j<count; j++ ) {
1088                         if (sockaddr_equal((struct sockaddr *)&iplist[i].ss, (struct sockaddr *)&iplist[j].ss) &&
1089                                         iplist[i].port == iplist[j].port) {
1090                                 zero_sockaddr(&iplist[j].ss);
1091                         }
1092                 }
1093         }
1094
1095         /* one loop to clean up any holes we left */
1096         /* first ip should never be a zero_ip() */
1097         for (i = 0; i<count; ) {
1098                 if (is_zero_addr(&iplist[i].ss) ) {
1099                         if (i != count-1) {
1100                                 memmove(&iplist[i], &iplist[i+1],
1101                                         (count - i - 1)*sizeof(iplist[i]));
1102                         }
1103                         count--;
1104                         continue;
1105                 }
1106                 i++;
1107         }
1108
1109         return count;
1110 }
1111
1112 static bool prioritize_ipv4_list(struct ip_service *iplist, int count)
1113 {
1114         TALLOC_CTX *frame = talloc_stackframe();
1115         struct ip_service *iplist_new = TALLOC_ARRAY(frame, struct ip_service, count);
1116         int i, j;
1117
1118         if (iplist_new == NULL) {
1119                 TALLOC_FREE(frame);
1120                 return false;
1121         }
1122
1123         j = 0;
1124
1125         /* Copy IPv4 first. */
1126         for (i = 0; i < count; i++) {
1127                 if (iplist[i].ss.ss_family == AF_INET) {
1128                         iplist_new[j++] = iplist[i];
1129                 }
1130         }
1131
1132         /* Copy IPv6. */
1133         for (i = 0; i < count; i++) {
1134                 if (iplist[i].ss.ss_family != AF_INET) {
1135                         iplist_new[j++] = iplist[i];
1136                 }
1137         }
1138
1139         memcpy(iplist, iplist_new, sizeof(struct ip_service)*count);
1140         TALLOC_FREE(frame);
1141         return true;
1142 }
1143
1144 /****************************************************************************
1145  Do a netbios name query to find someones IP.
1146  Returns an array of IP addresses or NULL if none.
1147  *count will be set to the number of addresses returned.
1148  *timed_out is set if we failed by timing out
1149 ****************************************************************************/
1150
1151 struct name_query_state {
1152         struct sockaddr_storage my_addr;
1153         struct sockaddr_storage addr;
1154         bool bcast;
1155
1156
1157         uint8_t buf[1024];
1158         ssize_t buflen;
1159
1160         NTSTATUS validate_error;
1161         uint8_t flags;
1162
1163         struct sockaddr_storage *addrs;
1164         int num_addrs;
1165 };
1166
1167 static bool name_query_validator(struct packet_struct *p, void *private_data);
1168 static void name_query_done(struct tevent_req *subreq);
1169
1170 struct tevent_req *name_query_send(TALLOC_CTX *mem_ctx,
1171                                    struct tevent_context *ev,
1172                                    const char *name, int name_type,
1173                                    bool bcast, bool recurse,
1174                                    const struct sockaddr_storage *addr)
1175 {
1176         struct tevent_req *req, *subreq;
1177         struct name_query_state *state;
1178         struct packet_struct p;
1179         struct nmb_packet *nmb = &p.packet.nmb;
1180         struct sockaddr_in *in_addr;
1181
1182         req = tevent_req_create(mem_ctx, &state, struct name_query_state);
1183         if (req == NULL) {
1184                 return NULL;
1185         }
1186         state->bcast = bcast;
1187
1188         if (addr->ss_family != AF_INET) {
1189                 /* Can't do node status to IPv6 */
1190                 tevent_req_nterror(req, NT_STATUS_INVALID_ADDRESS);
1191                 return tevent_req_post(req, ev);
1192         }
1193
1194         if (lp_disable_netbios()) {
1195                 DEBUG(5,("name_query(%s#%02x): netbios is disabled\n",
1196                                         name, name_type));
1197                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
1198                 return tevent_req_post(req, ev);
1199         }
1200
1201         state->addr = *addr;
1202         in_addr = (struct sockaddr_in *)(void *)&state->addr;
1203         in_addr->sin_port = htons(NMB_PORT);
1204
1205         if (!interpret_string_addr(&state->my_addr, lp_socket_address(),
1206                                    AI_NUMERICHOST|AI_PASSIVE)) {
1207                 zero_sockaddr(&state->my_addr);
1208         }
1209
1210         ZERO_STRUCT(p);
1211         nmb->header.name_trn_id = generate_trn_id();
1212         nmb->header.opcode = 0;
1213         nmb->header.response = false;
1214         nmb->header.nm_flags.bcast = bcast;
1215         nmb->header.nm_flags.recursion_available = false;
1216         nmb->header.nm_flags.recursion_desired = recurse;
1217         nmb->header.nm_flags.trunc = false;
1218         nmb->header.nm_flags.authoritative = false;
1219         nmb->header.rcode = 0;
1220         nmb->header.qdcount = 1;
1221         nmb->header.ancount = 0;
1222         nmb->header.nscount = 0;
1223         nmb->header.arcount = 0;
1224
1225         make_nmb_name(&nmb->question.question_name,name,name_type);
1226
1227         nmb->question.question_type = 0x20;
1228         nmb->question.question_class = 0x1;
1229
1230         state->buflen = build_packet((char *)state->buf, sizeof(state->buf),
1231                                      &p);
1232         if (state->buflen == 0) {
1233                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
1234                 DEBUG(10, ("build_packet failed\n"));
1235                 return tevent_req_post(req, ev);
1236         }
1237
1238         subreq = nb_trans_send(state, ev, &state->my_addr, &state->addr, bcast,
1239                                state->buf, state->buflen,
1240                                NMB_PACKET, nmb->header.name_trn_id,
1241                                name_query_validator, state);
1242         if (tevent_req_nomem(subreq, req)) {
1243                 DEBUG(10, ("nb_trans_send failed\n"));
1244                 return tevent_req_post(req, ev);
1245         }
1246         tevent_req_set_callback(subreq, name_query_done, req);
1247         return req;
1248 }
1249
1250 static bool name_query_validator(struct packet_struct *p, void *private_data)
1251 {
1252         struct name_query_state *state = talloc_get_type_abort(
1253                 private_data, struct name_query_state);
1254         struct nmb_packet *nmb = &p->packet.nmb;
1255         struct sockaddr_storage *tmp_addrs;
1256         bool got_unique_netbios_name = false;
1257         int i;
1258
1259         debug_nmb_packet(p);
1260
1261         /*
1262          * If we get a Negative Name Query Response from a WINS
1263          * server, we should report it and give up.
1264          */
1265         if( 0 == nmb->header.opcode     /* A query response   */
1266             && !state->bcast            /* from a WINS server */
1267             && nmb->header.rcode        /* Error returned     */
1268                 ) {
1269
1270                 if( DEBUGLVL( 3 ) ) {
1271                         /* Only executed if DEBUGLEVEL >= 3 */
1272                         dbgtext( "Negative name query "
1273                                  "response, rcode 0x%02x: ",
1274                                  nmb->header.rcode );
1275                         switch( nmb->header.rcode ) {
1276                         case 0x01:
1277                                 dbgtext("Request was invalidly formatted.\n");
1278                                 break;
1279                         case 0x02:
1280                                 dbgtext("Problem with NBNS, cannot process "
1281                                         "name.\n");
1282                                 break;
1283                         case 0x03:
1284                                 dbgtext("The name requested does not "
1285                                         "exist.\n");
1286                                 break;
1287                         case 0x04:
1288                                 dbgtext("Unsupported request error.\n");
1289                                 break;
1290                         case 0x05:
1291                                 dbgtext("Query refused error.\n");
1292                                 break;
1293                         default:
1294                                 dbgtext("Unrecognized error code.\n" );
1295                                 break;
1296                         }
1297                 }
1298
1299                 /*
1300                  * We accept this packet as valid, but tell the upper
1301                  * layers that it's a negative response.
1302                  */
1303                 state->validate_error = NT_STATUS_NOT_FOUND;
1304                 return true;
1305         }
1306
1307         if (nmb->header.opcode != 0 ||
1308             nmb->header.nm_flags.bcast ||
1309             nmb->header.rcode ||
1310             !nmb->header.ancount) {
1311                 /*
1312                  * XXXX what do we do with this? Could be a redirect,
1313                  * but we'll discard it for the moment.
1314                  */
1315                 return false;
1316         }
1317
1318         tmp_addrs = TALLOC_REALLOC_ARRAY(
1319                 state, state->addrs, struct sockaddr_storage,
1320                 state->num_addrs + nmb->answers->rdlength/6);
1321         if (tmp_addrs == NULL) {
1322                 state->validate_error = NT_STATUS_NO_MEMORY;
1323                 return true;
1324         }
1325         state->addrs = tmp_addrs;
1326
1327         DEBUG(2,("Got a positive name query response "
1328                  "from %s ( ", inet_ntoa(p->ip)));
1329
1330         for (i=0; i<nmb->answers->rdlength/6; i++) {
1331                 uint16_t flags;
1332                 struct in_addr ip;
1333                 struct sockaddr_storage addr;
1334                 int j;
1335
1336                 flags = RSVAL(&nmb->answers->rdata[i*6], 0);
1337                 got_unique_netbios_name |= ((flags & 0x8000) == 0);
1338
1339                 putip((char *)&ip,&nmb->answers->rdata[2+i*6]);
1340                 in_addr_to_sockaddr_storage(&addr, ip);
1341
1342                 for (j=0; j<state->num_addrs; j++) {
1343                         if (sockaddr_equal(
1344                                     (struct sockaddr *)&addr,
1345                                     (struct sockaddr *)&state->addrs[j])) {
1346                                 break;
1347                         }
1348                 }
1349                 if (j < state->num_addrs) {
1350                         /* Already got it */
1351                         continue;
1352                 }
1353
1354                 DEBUGADD(2,("%s ",inet_ntoa(ip)));
1355
1356                 state->addrs[state->num_addrs] = addr;
1357                 state->num_addrs += 1;
1358         }
1359         DEBUGADD(2,(")\n"));
1360
1361         /* We add the flags back ... */
1362         if (nmb->header.response)
1363                 state->flags |= NM_FLAGS_RS;
1364         if (nmb->header.nm_flags.authoritative)
1365                 state->flags |= NM_FLAGS_AA;
1366         if (nmb->header.nm_flags.trunc)
1367                 state->flags |= NM_FLAGS_TC;
1368         if (nmb->header.nm_flags.recursion_desired)
1369                 state->flags |= NM_FLAGS_RD;
1370         if (nmb->header.nm_flags.recursion_available)
1371                 state->flags |= NM_FLAGS_RA;
1372         if (nmb->header.nm_flags.bcast)
1373                 state->flags |= NM_FLAGS_B;
1374
1375         if (state->bcast) {
1376                 /*
1377                  * We have to collect all entries coming in from broadcast
1378                  * queries. If we got a unique name, we're done.
1379                  */
1380                 return got_unique_netbios_name;
1381         }
1382         /*
1383          * WINS responses are accepted when they are received
1384          */
1385         return true;
1386 }
1387
1388 static void name_query_done(struct tevent_req *subreq)
1389 {
1390         struct tevent_req *req = tevent_req_callback_data(
1391                 subreq, struct tevent_req);
1392         struct name_query_state *state = tevent_req_data(
1393                 req, struct name_query_state);
1394         NTSTATUS status;
1395         struct packet_struct *p = NULL;
1396
1397         status = nb_trans_recv(subreq, &p);
1398         TALLOC_FREE(subreq);
1399         if (tevent_req_nterror(req, status)) {
1400                 return;
1401         }
1402         if (!NT_STATUS_IS_OK(state->validate_error)) {
1403                 tevent_req_nterror(req, state->validate_error);
1404                 return;
1405         }
1406         if (p != NULL) {
1407                 /*
1408                  * Free the packet here, we've collected the response in the
1409                  * validator
1410                  */
1411                 free_packet(p);
1412         }
1413         tevent_req_done(req);
1414 }
1415
1416 NTSTATUS name_query_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
1417                          struct sockaddr_storage **addrs, int *num_addrs,
1418                          uint8_t *flags)
1419 {
1420         struct name_query_state *state = tevent_req_data(
1421                 req, struct name_query_state);
1422         NTSTATUS status;
1423
1424         if (tevent_req_is_nterror(req, &status)
1425             && !NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
1426                 return status;
1427         }
1428         if (state->num_addrs == 0) {
1429                 return NT_STATUS_NOT_FOUND;
1430         }
1431         *addrs = talloc_move(mem_ctx, &state->addrs);
1432         sort_addr_list(*addrs, state->num_addrs);
1433         *num_addrs = state->num_addrs;
1434         if (flags != NULL) {
1435                 *flags = state->flags;
1436         }
1437         return NT_STATUS_OK;
1438 }
1439
1440 NTSTATUS name_query(const char *name, int name_type,
1441                     bool bcast, bool recurse,
1442                     const struct sockaddr_storage *to_ss,
1443                     TALLOC_CTX *mem_ctx,
1444                     struct sockaddr_storage **addrs,
1445                     int *num_addrs, uint8_t *flags)
1446 {
1447         TALLOC_CTX *frame = talloc_stackframe();
1448         struct tevent_context *ev;
1449         struct tevent_req *req;
1450         struct timeval timeout;
1451         NTSTATUS status = NT_STATUS_NO_MEMORY;
1452
1453         ev = tevent_context_init(frame);
1454         if (ev == NULL) {
1455                 goto fail;
1456         }
1457         req = name_query_send(ev, ev, name, name_type, bcast, recurse, to_ss);
1458         if (req == NULL) {
1459                 goto fail;
1460         }
1461         if (bcast) {
1462                 timeout = timeval_current_ofs(0, 250000);
1463         } else {
1464                 timeout = timeval_current_ofs(2, 0);
1465         }
1466         if (!tevent_req_set_endtime(req, ev, timeout)) {
1467                 goto fail;
1468         }
1469         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
1470                 goto fail;
1471         }
1472         status = name_query_recv(req, mem_ctx, addrs, num_addrs, flags);
1473  fail:
1474         TALLOC_FREE(frame);
1475         return status;
1476 }
1477
1478 /********************************************************
1479  convert an array if struct sockaddr_storage to struct ip_service
1480  return false on failure.  Port is set to PORT_NONE;
1481 *********************************************************/
1482
1483 static bool convert_ss2service(struct ip_service **return_iplist,
1484                 const struct sockaddr_storage *ss_list,
1485                 int count)
1486 {
1487         int i;
1488
1489         if ( count==0 || !ss_list )
1490                 return False;
1491
1492         /* copy the ip address; port will be PORT_NONE */
1493         if ((*return_iplist = SMB_MALLOC_ARRAY(struct ip_service, count)) ==
1494                         NULL) {
1495                 DEBUG(0,("convert_ip2service: malloc failed "
1496                         "for %d enetries!\n", count ));
1497                 return False;
1498         }
1499
1500         for ( i=0; i<count; i++ ) {
1501                 (*return_iplist)[i].ss   = ss_list[i];
1502                 (*return_iplist)[i].port = PORT_NONE;
1503         }
1504
1505         return true;
1506 }
1507
1508 /********************************************************
1509  Resolve via "bcast" method.
1510 *********************************************************/
1511
1512 NTSTATUS name_resolve_bcast(const char *name,
1513                         int name_type,
1514                         TALLOC_CTX *mem_ctx,
1515                         struct sockaddr_storage **return_iplist,
1516                         int *return_count)
1517 {
1518         int i;
1519         int num_interfaces = iface_count();
1520         struct sockaddr_storage *ss_list;
1521         NTSTATUS status = NT_STATUS_NOT_FOUND;
1522
1523         if (lp_disable_netbios()) {
1524                 DEBUG(5,("name_resolve_bcast(%s#%02x): netbios is disabled\n",
1525                                         name, name_type));
1526                 return NT_STATUS_INVALID_PARAMETER;
1527         }
1528
1529         *return_iplist = NULL;
1530         *return_count = 0;
1531
1532         /*
1533          * "bcast" means do a broadcast lookup on all the local interfaces.
1534          */
1535
1536         DEBUG(3,("name_resolve_bcast: Attempting broadcast lookup "
1537                 "for name %s<0x%x>\n", name, name_type));
1538
1539         /*
1540          * Lookup the name on all the interfaces, return on
1541          * the first successful match.
1542          */
1543         for( i = num_interfaces-1; i >= 0; i--) {
1544                 const struct sockaddr_storage *pss = iface_n_bcast(i);
1545
1546                 /* Done this way to fix compiler error on IRIX 5.x */
1547                 if (!pss) {
1548                         continue;
1549                 }
1550                 status = name_query(name, name_type, true, true, pss,
1551                                     talloc_tos(), &ss_list, return_count,
1552                                     NULL);
1553                 if (NT_STATUS_IS_OK(status)) {
1554                         goto success;
1555                 }
1556         }
1557
1558         /* failed - no response */
1559
1560         return status;
1561
1562 success:
1563         *return_iplist = ss_list;
1564         return status;
1565 }
1566
1567 /********************************************************
1568  Resolve via "wins" method.
1569 *********************************************************/
1570
1571 NTSTATUS resolve_wins(const char *name,
1572                 int name_type,
1573                 struct ip_service **return_iplist,
1574                 int *return_count)
1575 {
1576         int t, i;
1577         char **wins_tags;
1578         struct sockaddr_storage src_ss, *ss_list = NULL;
1579         struct in_addr src_ip;
1580         NTSTATUS status;
1581
1582         if (lp_disable_netbios()) {
1583                 DEBUG(5,("resolve_wins(%s#%02x): netbios is disabled\n",
1584                                         name, name_type));
1585                 return NT_STATUS_INVALID_PARAMETER;
1586         }
1587
1588         *return_iplist = NULL;
1589         *return_count = 0;
1590
1591         DEBUG(3,("resolve_wins: Attempting wins lookup for name %s<0x%x>\n",
1592                                 name, name_type));
1593
1594         if (wins_srv_count() < 1) {
1595                 DEBUG(3,("resolve_wins: WINS server resolution selected "
1596                         "and no WINS servers listed.\n"));
1597                 return NT_STATUS_INVALID_PARAMETER;
1598         }
1599
1600         /* we try a lookup on each of the WINS tags in turn */
1601         wins_tags = wins_srv_tags();
1602
1603         if (!wins_tags) {
1604                 /* huh? no tags?? give up in disgust */
1605                 return NT_STATUS_INVALID_PARAMETER;
1606         }
1607
1608         /* the address we will be sending from */
1609         if (!interpret_string_addr(&src_ss, lp_socket_address(),
1610                                 AI_NUMERICHOST|AI_PASSIVE)) {
1611                 zero_sockaddr(&src_ss);
1612         }
1613
1614         if (src_ss.ss_family != AF_INET) {
1615                 char addr[INET6_ADDRSTRLEN];
1616                 print_sockaddr(addr, sizeof(addr), &src_ss);
1617                 DEBUG(3,("resolve_wins: cannot receive WINS replies "
1618                         "on IPv6 address %s\n",
1619                         addr));
1620                 wins_srv_tags_free(wins_tags);
1621                 return NT_STATUS_INVALID_PARAMETER;
1622         }
1623
1624         src_ip = ((struct sockaddr_in *)&src_ss)->sin_addr;
1625
1626         /* in the worst case we will try every wins server with every
1627            tag! */
1628         for (t=0; wins_tags && wins_tags[t]; t++) {
1629                 int srv_count = wins_srv_count_tag(wins_tags[t]);
1630                 for (i=0; i<srv_count; i++) {
1631                         struct sockaddr_storage wins_ss;
1632                         struct in_addr wins_ip;
1633
1634                         wins_ip = wins_srv_ip_tag(wins_tags[t], src_ip);
1635
1636                         if (global_in_nmbd && ismyip_v4(wins_ip)) {
1637                                 /* yikes! we'll loop forever */
1638                                 continue;
1639                         }
1640
1641                         /* skip any that have been unresponsive lately */
1642                         if (wins_srv_is_dead(wins_ip, src_ip)) {
1643                                 continue;
1644                         }
1645
1646                         DEBUG(3,("resolve_wins: using WINS server %s "
1647                                 "and tag '%s'\n",
1648                                 inet_ntoa(wins_ip), wins_tags[t]));
1649
1650                         in_addr_to_sockaddr_storage(&wins_ss, wins_ip);
1651                         status = name_query(name,
1652                                                 name_type,
1653                                                 false,
1654                                                 true,
1655                                                 &wins_ss,
1656                                                 talloc_tos(),
1657                                                 &ss_list,
1658                                                 return_count,
1659                                                 NULL);
1660
1661                         /* exit loop if we got a list of addresses */
1662
1663                         if (NT_STATUS_IS_OK(status)) {
1664                                 goto success;
1665                         }
1666
1667                         if (NT_STATUS_EQUAL(status,
1668                                             NT_STATUS_IO_TIMEOUT)) {
1669                                 /* Timed out waiting for WINS server to
1670                                  * respond.
1671                                  * Mark it dead. */
1672                                 wins_srv_died(wins_ip, src_ip);
1673                         } else {
1674                                 /* The name definitely isn't in this
1675                                    group of WINS servers.
1676                                    goto the next group  */
1677                                 break;
1678                         }
1679                 }
1680         }
1681
1682         wins_srv_tags_free(wins_tags);
1683         return NT_STATUS_NO_LOGON_SERVERS;
1684
1685 success:
1686
1687         status = NT_STATUS_OK;
1688         if (!convert_ss2service(return_iplist, ss_list, *return_count))
1689                 status = NT_STATUS_INVALID_PARAMETER;
1690
1691         TALLOC_FREE(ss_list);
1692         wins_srv_tags_free(wins_tags);
1693
1694         return status;
1695 }
1696
1697 /********************************************************
1698  Resolve via "lmhosts" method.
1699 *********************************************************/
1700
1701 static NTSTATUS resolve_lmhosts(const char *name, int name_type,
1702                                 struct ip_service **return_iplist,
1703                                 int *return_count)
1704 {
1705         /*
1706          * "lmhosts" means parse the local lmhosts file.
1707          */
1708         struct sockaddr_storage *ss_list;
1709         NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1710         TALLOC_CTX *ctx = NULL;
1711
1712         *return_iplist = NULL;
1713         *return_count = 0;
1714
1715         DEBUG(3,("resolve_lmhosts: "
1716                 "Attempting lmhosts lookup for name %s<0x%x>\n",
1717                 name, name_type));
1718
1719         ctx = talloc_init("resolve_lmhosts");
1720         if (!ctx) {
1721                 return NT_STATUS_NO_MEMORY;
1722         }
1723
1724         status = resolve_lmhosts_file_as_sockaddr(get_dyn_LMHOSTSFILE(),
1725                                                   name, name_type,
1726                                                   ctx,
1727                                                   &ss_list,
1728                                                   return_count);
1729         if (NT_STATUS_IS_OK(status)) {
1730                 if (convert_ss2service(return_iplist,
1731                                        ss_list,
1732                                        *return_count)) {
1733                         talloc_free(ctx);
1734                         return NT_STATUS_OK;
1735                 } else {
1736                         talloc_free(ctx);
1737                         return NT_STATUS_NO_MEMORY;
1738                 }
1739         }
1740         talloc_free(ctx);
1741         return status;
1742 }
1743
1744
1745 /********************************************************
1746  Resolve via "hosts" method.
1747 *********************************************************/
1748
1749 static NTSTATUS resolve_hosts(const char *name, int name_type,
1750                               struct ip_service **return_iplist,
1751                               int *return_count)
1752 {
1753         /*
1754          * "host" means do a localhost, or dns lookup.
1755          */
1756         struct addrinfo hints;
1757         struct addrinfo *ailist = NULL;
1758         struct addrinfo *res = NULL;
1759         int ret = -1;
1760         int i = 0;
1761
1762         if ( name_type != 0x20 && name_type != 0x0) {
1763                 DEBUG(5, ("resolve_hosts: not appropriate "
1764                         "for name type <0x%x>\n",
1765                         name_type));
1766                 return NT_STATUS_INVALID_PARAMETER;
1767         }
1768
1769         *return_iplist = NULL;
1770         *return_count = 0;
1771
1772         DEBUG(3,("resolve_hosts: Attempting host lookup for name %s<0x%x>\n",
1773                                 name, name_type));
1774
1775         ZERO_STRUCT(hints);
1776         /* By default make sure it supports TCP. */
1777         hints.ai_socktype = SOCK_STREAM;
1778         hints.ai_flags = AI_ADDRCONFIG;
1779
1780 #if !defined(HAVE_IPV6)
1781         /* Unless we have IPv6, we really only want IPv4 addresses back. */
1782         hints.ai_family = AF_INET;
1783 #endif
1784
1785         ret = getaddrinfo(name,
1786                         NULL,
1787                         &hints,
1788                         &ailist);
1789         if (ret) {
1790                 DEBUG(3,("resolve_hosts: getaddrinfo failed for name %s [%s]\n",
1791                         name,
1792                         gai_strerror(ret) ));
1793         }
1794
1795         for (res = ailist; res; res = res->ai_next) {
1796                 struct sockaddr_storage ss;
1797
1798                 if (!res->ai_addr || res->ai_addrlen == 0) {
1799                         continue;
1800                 }
1801
1802                 ZERO_STRUCT(ss);
1803                 memcpy(&ss, res->ai_addr, res->ai_addrlen);
1804
1805                 *return_count += 1;
1806
1807                 *return_iplist = SMB_REALLOC_ARRAY(*return_iplist,
1808                                                 struct ip_service,
1809                                                 *return_count);
1810                 if (!*return_iplist) {
1811                         DEBUG(3,("resolve_hosts: malloc fail !\n"));
1812                         freeaddrinfo(ailist);
1813                         return NT_STATUS_NO_MEMORY;
1814                 }
1815                 (*return_iplist)[i].ss = ss;
1816                 (*return_iplist)[i].port = PORT_NONE;
1817                 i++;
1818         }
1819         if (ailist) {
1820                 freeaddrinfo(ailist);
1821         }
1822         if (*return_count) {
1823                 return NT_STATUS_OK;
1824         }
1825         return NT_STATUS_UNSUCCESSFUL;
1826 }
1827
1828 /********************************************************
1829  Resolve via "ADS" method.
1830 *********************************************************/
1831
1832 /* Special name type used to cause a _kerberos DNS lookup. */
1833 #define KDC_NAME_TYPE 0xDCDC
1834
1835 static NTSTATUS resolve_ads(const char *name,
1836                             int name_type,
1837                             const char *sitename,
1838                             struct ip_service **return_iplist,
1839                             int *return_count)
1840 {
1841         int                     i, j;
1842         NTSTATUS                status;
1843         TALLOC_CTX              *ctx;
1844         struct dns_rr_srv       *dcs = NULL;
1845         int                     numdcs = 0;
1846         int                     numaddrs = 0;
1847
1848         if ((name_type != 0x1c) && (name_type != KDC_NAME_TYPE) &&
1849             (name_type != 0x1b)) {
1850                 return NT_STATUS_INVALID_PARAMETER;
1851         }
1852
1853         if ( (ctx = talloc_init("resolve_ads")) == NULL ) {
1854                 DEBUG(0,("resolve_ads: talloc_init() failed!\n"));
1855                 return NT_STATUS_NO_MEMORY;
1856         }
1857
1858         /* The DNS code needs fixing to find IPv6 addresses... JRA. */
1859
1860         switch (name_type) {
1861                 case 0x1b:
1862                         DEBUG(5,("resolve_ads: Attempting to resolve "
1863                                  "PDC for %s using DNS\n", name));
1864                         status = ads_dns_query_pdc(ctx, name, &dcs, &numdcs);
1865                         break;
1866
1867                 case 0x1c:
1868                         DEBUG(5,("resolve_ads: Attempting to resolve "
1869                                  "DCs for %s using DNS\n", name));
1870                         status = ads_dns_query_dcs(ctx, name, sitename, &dcs,
1871                                                    &numdcs);
1872                         break;
1873                 case KDC_NAME_TYPE:
1874                         DEBUG(5,("resolve_ads: Attempting to resolve "
1875                                  "KDCs for %s using DNS\n", name));
1876                         status = ads_dns_query_kdcs(ctx, name, sitename, &dcs,
1877                                                     &numdcs);
1878                         break;
1879                 default:
1880                         status = NT_STATUS_INVALID_PARAMETER;
1881                         break;
1882         }
1883
1884         if ( !NT_STATUS_IS_OK( status ) ) {
1885                 talloc_destroy(ctx);
1886                 return status;
1887         }
1888
1889         for (i=0;i<numdcs;i++) {
1890                 numaddrs += MAX(dcs[i].num_ips,1);
1891         }
1892
1893         if ((*return_iplist = SMB_MALLOC_ARRAY(struct ip_service, numaddrs)) ==
1894                         NULL ) {
1895                 DEBUG(0,("resolve_ads: malloc failed for %d entries\n",
1896                                         numaddrs ));
1897                 talloc_destroy(ctx);
1898                 return NT_STATUS_NO_MEMORY;
1899         }
1900
1901         /* now unroll the list of IP addresses */
1902
1903         *return_count = 0;
1904         i = 0;
1905         j = 0;
1906         while ( i < numdcs && (*return_count<numaddrs) ) {
1907                 struct ip_service *r = &(*return_iplist)[*return_count];
1908
1909                 r->port = dcs[i].port;
1910
1911                 /* If we don't have an IP list for a name, lookup it up */
1912
1913                 if (!dcs[i].ss_s) {
1914                         interpret_string_addr(&r->ss, dcs[i].hostname, 0);
1915                         i++;
1916                         j = 0;
1917                 } else {
1918                         /* use the IP addresses from the SRV sresponse */
1919
1920                         if ( j >= dcs[i].num_ips ) {
1921                                 i++;
1922                                 j = 0;
1923                                 continue;
1924                         }
1925
1926                         r->ss = dcs[i].ss_s[j];
1927                         j++;
1928                 }
1929
1930                 /* make sure it is a valid IP.  I considered checking the
1931                  * negative connection cache, but this is the wrong place
1932                  * for it. Maybe only as a hack. After think about it, if
1933                  * all of the IP addresses returned from DNS are dead, what
1934                  * hope does a netbios name lookup have ? The standard reason
1935                  * for falling back to netbios lookups is that our DNS server
1936                  * doesn't know anything about the DC's   -- jerry */
1937
1938                 if (!is_zero_addr(&r->ss)) {
1939                         (*return_count)++;
1940                 }
1941         }
1942
1943         talloc_destroy(ctx);
1944         return NT_STATUS_OK;
1945 }
1946
1947 /*******************************************************************
1948  Internal interface to resolve a name into an IP address.
1949  Use this function if the string is either an IP address, DNS
1950  or host name or NetBIOS name. This uses the name switch in the
1951  smb.conf to determine the order of name resolution.
1952
1953  Added support for ip addr/port to support ADS ldap servers.
1954  the only place we currently care about the port is in the
1955  resolve_hosts() when looking up DC's via SRV RR entries in DNS
1956 **********************************************************************/
1957
1958 NTSTATUS internal_resolve_name(const char *name,
1959                                 int name_type,
1960                                 const char *sitename,
1961                                 struct ip_service **return_iplist,
1962                                 int *return_count,
1963                                 const char *resolve_order)
1964 {
1965         char *tok;
1966         const char *ptr;
1967         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
1968         int i;
1969         TALLOC_CTX *frame = NULL;
1970
1971         *return_iplist = NULL;
1972         *return_count = 0;
1973
1974         DEBUG(10, ("internal_resolve_name: looking up %s#%x (sitename %s)\n",
1975                         name, name_type, sitename ? sitename : "(null)"));
1976
1977         if (is_ipaddress(name)) {
1978                 if ((*return_iplist = SMB_MALLOC_P(struct ip_service)) ==
1979                                 NULL) {
1980                         DEBUG(0,("internal_resolve_name: malloc fail !\n"));
1981                         return NT_STATUS_NO_MEMORY;
1982                 }
1983
1984                 /* ignore the port here */
1985                 (*return_iplist)->port = PORT_NONE;
1986
1987                 /* if it's in the form of an IP address then get the lib to interpret it */
1988                 if (!interpret_string_addr(&(*return_iplist)->ss,
1989                                         name, AI_NUMERICHOST)) {
1990                         DEBUG(1,("internal_resolve_name: interpret_string_addr "
1991                                 "failed on %s\n",
1992                                 name));
1993                         SAFE_FREE(*return_iplist);
1994                         return NT_STATUS_INVALID_PARAMETER;
1995                 }
1996                 *return_count = 1;
1997                 return NT_STATUS_OK;
1998         }
1999
2000         /* Check name cache */
2001
2002         if (namecache_fetch(name, name_type, return_iplist, return_count)) {
2003                 /* This could be a negative response */
2004                 if (*return_count > 0) {
2005                         return NT_STATUS_OK;
2006                 } else {
2007                         return NT_STATUS_UNSUCCESSFUL;
2008                 }
2009         }
2010
2011         /* set the name resolution order */
2012
2013         if (strcmp( resolve_order, "NULL") == 0) {
2014                 DEBUG(8,("internal_resolve_name: all lookups disabled\n"));
2015                 return NT_STATUS_INVALID_PARAMETER;
2016         }
2017
2018         if (!resolve_order[0]) {
2019                 ptr = "host";
2020         } else {
2021                 ptr = resolve_order;
2022         }
2023
2024         /* iterate through the name resolution backends */
2025
2026         frame = talloc_stackframe();
2027         while (next_token_talloc(frame, &ptr, &tok, LIST_SEP)) {
2028                 if((strequal(tok, "host") || strequal(tok, "hosts"))) {
2029                         status = resolve_hosts(name, name_type, return_iplist,
2030                                                return_count);
2031                         if (NT_STATUS_IS_OK(status)) {
2032                                 goto done;
2033                         }
2034                 } else if(strequal( tok, "kdc")) {
2035                         /* deal with KDC_NAME_TYPE names here.
2036                          * This will result in a SRV record lookup */
2037                         status = resolve_ads(name, KDC_NAME_TYPE, sitename,
2038                                              return_iplist, return_count);
2039                         if (NT_STATUS_IS_OK(status)) {
2040                                 /* Ensure we don't namecache
2041                                  * this with the KDC port. */
2042                                 name_type = KDC_NAME_TYPE;
2043                                 goto done;
2044                         }
2045                 } else if(strequal( tok, "ads")) {
2046                         /* deal with 0x1c and 0x1b names here.
2047                          * This will result in a SRV record lookup */
2048                         status = resolve_ads(name, name_type, sitename,
2049                                              return_iplist, return_count);
2050                         if (NT_STATUS_IS_OK(status)) {
2051                                 goto done;
2052                         }
2053                 } else if(strequal( tok, "lmhosts")) {
2054                         status = resolve_lmhosts(name, name_type,
2055                                                  return_iplist, return_count);
2056                         if (NT_STATUS_IS_OK(status)) {
2057                                 goto done;
2058                         }
2059                 } else if(strequal( tok, "wins")) {
2060                         /* don't resolve 1D via WINS */
2061                         if (name_type != 0x1D) {
2062                                 status = resolve_wins(name, name_type,
2063                                                       return_iplist,
2064                                                       return_count);
2065                                 if (NT_STATUS_IS_OK(status)) {
2066                                         goto done;
2067                                 }
2068                         }
2069                 } else if(strequal( tok, "bcast")) {
2070                         struct sockaddr_storage *ss_list;
2071                         status = name_resolve_bcast(
2072                                 name, name_type, talloc_tos(),
2073                                 &ss_list, return_count);
2074                         if (NT_STATUS_IS_OK(status)) {
2075                                 if (!convert_ss2service(return_iplist,
2076                                                         ss_list,
2077                                                         *return_count)) {
2078                                         status = NT_STATUS_NO_MEMORY;
2079                                 }
2080                                 goto done;
2081                         }
2082                 } else {
2083                         DEBUG(0,("resolve_name: unknown name switch type %s\n",
2084                                 tok));
2085                 }
2086         }
2087
2088         /* All of the resolve_* functions above have returned false. */
2089
2090         TALLOC_FREE(frame);
2091         SAFE_FREE(*return_iplist);
2092         *return_count = 0;
2093
2094         return NT_STATUS_UNSUCCESSFUL;
2095
2096   done:
2097
2098         /* Remove duplicate entries.  Some queries, notably #1c (domain
2099         controllers) return the PDC in iplist[0] and then all domain
2100         controllers including the PDC in iplist[1..n].  Iterating over
2101         the iplist when the PDC is down will cause two sets of timeouts. */
2102
2103         if ( *return_count ) {
2104                 *return_count = remove_duplicate_addrs2(*return_iplist,
2105                                         *return_count );
2106         }
2107
2108         /* Save in name cache */
2109         if ( DEBUGLEVEL >= 100 ) {
2110                 for (i = 0; i < *return_count && DEBUGLEVEL == 100; i++) {
2111                         char addr[INET6_ADDRSTRLEN];
2112                         print_sockaddr(addr, sizeof(addr),
2113                                         &(*return_iplist)[i].ss);
2114                         DEBUG(100, ("Storing name %s of type %d (%s:%d)\n",
2115                                         name,
2116                                         name_type,
2117                                         addr,
2118                                         (*return_iplist)[i].port));
2119                 }
2120         }
2121
2122         namecache_store(name, name_type, *return_count, *return_iplist);
2123
2124         /* Display some debugging info */
2125
2126         if ( DEBUGLEVEL >= 10 ) {
2127                 DEBUG(10, ("internal_resolve_name: returning %d addresses: ",
2128                                         *return_count));
2129
2130                 for (i = 0; i < *return_count; i++) {
2131                         char addr[INET6_ADDRSTRLEN];
2132                         print_sockaddr(addr, sizeof(addr),
2133                                         &(*return_iplist)[i].ss);
2134                         DEBUGADD(10, ("%s:%d ",
2135                                         addr,
2136                                         (*return_iplist)[i].port));
2137                 }
2138                 DEBUG(10, ("\n"));
2139         }
2140
2141         TALLOC_FREE(frame);
2142         return status;
2143 }
2144
2145 /********************************************************
2146  Internal interface to resolve a name into one IP address.
2147  Use this function if the string is either an IP address, DNS
2148  or host name or NetBIOS name. This uses the name switch in the
2149  smb.conf to determine the order of name resolution.
2150 *********************************************************/
2151
2152 bool resolve_name(const char *name,
2153                 struct sockaddr_storage *return_ss,
2154                 int name_type,
2155                 bool prefer_ipv4)
2156 {
2157         struct ip_service *ss_list = NULL;
2158         char *sitename = NULL;
2159         int count = 0;
2160
2161         if (is_ipaddress(name)) {
2162                 return interpret_string_addr(return_ss, name, AI_NUMERICHOST);
2163         }
2164
2165         sitename = sitename_fetch(lp_realm()); /* wild guess */
2166
2167         if (NT_STATUS_IS_OK(internal_resolve_name(name, name_type, sitename,
2168                                                   &ss_list, &count,
2169                                                   lp_name_resolve_order()))) {
2170                 int i;
2171
2172                 if (prefer_ipv4) {
2173                         for (i=0; i<count; i++) {
2174                                 if (!is_zero_addr(&ss_list[i].ss) &&
2175                                                 !is_broadcast_addr((struct sockaddr *)&ss_list[i].ss) &&
2176                                                 (ss_list[i].ss.ss_family == AF_INET)) {
2177                                         *return_ss = ss_list[i].ss;
2178                                         SAFE_FREE(ss_list);
2179                                         SAFE_FREE(sitename);
2180                                         return True;
2181                                 }
2182                         }
2183                 }
2184
2185                 /* only return valid addresses for TCP connections */
2186                 for (i=0; i<count; i++) {
2187                         if (!is_zero_addr(&ss_list[i].ss) &&
2188                                         !is_broadcast_addr((struct sockaddr *)&ss_list[i].ss)) {
2189                                 *return_ss = ss_list[i].ss;
2190                                 SAFE_FREE(ss_list);
2191                                 SAFE_FREE(sitename);
2192                                 return True;
2193                         }
2194                 }
2195         }
2196
2197         SAFE_FREE(ss_list);
2198         SAFE_FREE(sitename);
2199         return False;
2200 }
2201
2202 /********************************************************
2203  Internal interface to resolve a name into a list of IP addresses.
2204  Use this function if the string is either an IP address, DNS
2205  or host name or NetBIOS name. This uses the name switch in the
2206  smb.conf to determine the order of name resolution.
2207 *********************************************************/
2208
2209 NTSTATUS resolve_name_list(TALLOC_CTX *ctx,
2210                 const char *name,
2211                 int name_type,
2212                 struct sockaddr_storage **return_ss_arr,
2213                 unsigned int *p_num_entries)
2214 {
2215         struct ip_service *ss_list = NULL;
2216         char *sitename = NULL;
2217         int count = 0;
2218         int i;
2219         unsigned int num_entries;
2220         NTSTATUS status;
2221
2222         *p_num_entries = 0;
2223         *return_ss_arr = NULL;
2224
2225         if (is_ipaddress(name)) {
2226                 *return_ss_arr = TALLOC_P(ctx, struct sockaddr_storage);
2227                 if (!*return_ss_arr) {
2228                         return NT_STATUS_NO_MEMORY;
2229                 }
2230                 if (!interpret_string_addr(*return_ss_arr, name, AI_NUMERICHOST)) {
2231                         TALLOC_FREE(*return_ss_arr);
2232                         return NT_STATUS_BAD_NETWORK_NAME;
2233                 }
2234                 *p_num_entries = 1;
2235                 return NT_STATUS_OK;
2236         }
2237
2238         sitename = sitename_fetch(lp_realm()); /* wild guess */
2239
2240         status = internal_resolve_name(name, name_type, sitename,
2241                                                   &ss_list, &count,
2242                                                   lp_name_resolve_order());
2243         SAFE_FREE(sitename);
2244
2245         if (!NT_STATUS_IS_OK(status)) {
2246                 return status;
2247         }
2248
2249         /* only return valid addresses for TCP connections */
2250         for (i=0, num_entries = 0; i<count; i++) {
2251                 if (!is_zero_addr(&ss_list[i].ss) &&
2252                                 !is_broadcast_addr((struct sockaddr *)&ss_list[i].ss)) {
2253                         num_entries++;
2254                 }
2255         }
2256         if (num_entries == 0) {
2257                 SAFE_FREE(ss_list);
2258                 return NT_STATUS_BAD_NETWORK_NAME;
2259         }
2260
2261         *return_ss_arr = TALLOC_ARRAY(ctx,
2262                                 struct sockaddr_storage,
2263                                 num_entries);
2264         if (!(*return_ss_arr)) {
2265                 SAFE_FREE(ss_list);
2266                 return NT_STATUS_NO_MEMORY;
2267         }
2268
2269         for (i=0, num_entries = 0; i<count; i++) {
2270                 if (!is_zero_addr(&ss_list[i].ss) &&
2271                                 !is_broadcast_addr((struct sockaddr *)&ss_list[i].ss)) {
2272                         (*return_ss_arr)[num_entries++] = ss_list[i].ss;
2273                 }
2274         }
2275
2276         status = NT_STATUS_OK;
2277         *p_num_entries = num_entries;
2278
2279         SAFE_FREE(ss_list);
2280         return NT_STATUS_OK;
2281 }
2282
2283 /********************************************************
2284  Find the IP address of the master browser or DMB for a workgroup.
2285 *********************************************************/
2286
2287 bool find_master_ip(const char *group, struct sockaddr_storage *master_ss)
2288 {
2289         struct ip_service *ip_list = NULL;
2290         int count = 0;
2291         NTSTATUS status;
2292
2293         if (lp_disable_netbios()) {
2294                 DEBUG(5,("find_master_ip(%s): netbios is disabled\n", group));
2295                 return false;
2296         }
2297
2298         status = internal_resolve_name(group, 0x1D, NULL, &ip_list, &count,
2299                                        lp_name_resolve_order());
2300         if (NT_STATUS_IS_OK(status)) {
2301                 *master_ss = ip_list[0].ss;
2302                 SAFE_FREE(ip_list);
2303                 return true;
2304         }
2305
2306         status = internal_resolve_name(group, 0x1B, NULL, &ip_list, &count,
2307                                        lp_name_resolve_order());
2308         if (NT_STATUS_IS_OK(status)) {
2309                 *master_ss = ip_list[0].ss;
2310                 SAFE_FREE(ip_list);
2311                 return true;
2312         }
2313
2314         SAFE_FREE(ip_list);
2315         return false;
2316 }
2317
2318 /********************************************************
2319  Get the IP address list of the primary domain controller
2320  for a domain.
2321 *********************************************************/
2322
2323 bool get_pdc_ip(const char *domain, struct sockaddr_storage *pss)
2324 {
2325         struct ip_service *ip_list = NULL;
2326         int count = 0;
2327         NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
2328
2329         /* Look up #1B name */
2330
2331         if (lp_security() == SEC_ADS) {
2332                 status = internal_resolve_name(domain, 0x1b, NULL, &ip_list,
2333                                                &count, "ads");
2334         }
2335
2336         if (!NT_STATUS_IS_OK(status) || count == 0) {
2337                 status = internal_resolve_name(domain, 0x1b, NULL, &ip_list,
2338                                                &count,
2339                                                lp_name_resolve_order());
2340                 if (!NT_STATUS_IS_OK(status)) {
2341                         return false;
2342                 }
2343         }
2344
2345         /* if we get more than 1 IP back we have to assume it is a
2346            multi-homed PDC and not a mess up */
2347
2348         if ( count > 1 ) {
2349                 DEBUG(6,("get_pdc_ip: PDC has %d IP addresses!\n", count));
2350                 sort_service_list(ip_list, count);
2351         }
2352
2353         *pss = ip_list[0].ss;
2354         SAFE_FREE(ip_list);
2355         return true;
2356 }
2357
2358 /* Private enum type for lookups. */
2359
2360 enum dc_lookup_type { DC_NORMAL_LOOKUP, DC_ADS_ONLY, DC_KDC_ONLY };
2361
2362 /********************************************************
2363  Get the IP address list of the domain controllers for
2364  a domain.
2365 *********************************************************/
2366
2367 static NTSTATUS get_dc_list(const char *domain,
2368                         const char *sitename,
2369                         struct ip_service **ip_list,
2370                         int *count,
2371                         enum dc_lookup_type lookup_type,
2372                         bool *ordered)
2373 {
2374         char *resolve_order = NULL;
2375         char *saf_servername = NULL;
2376         char *pserver = NULL;
2377         const char *p;
2378         char *port_str = NULL;
2379         int port;
2380         char *name;
2381         int num_addresses = 0;
2382         int  local_count, i, j;
2383         struct ip_service *return_iplist = NULL;
2384         struct ip_service *auto_ip_list = NULL;
2385         bool done_auto_lookup = false;
2386         int auto_count = 0;
2387         NTSTATUS status;
2388         TALLOC_CTX *ctx = talloc_init("get_dc_list");
2389
2390         *ip_list = NULL;
2391         *count = 0;
2392
2393         if (!ctx) {
2394                 return NT_STATUS_NO_MEMORY;
2395         }
2396
2397         *ordered = False;
2398
2399         /* if we are restricted to solely using DNS for looking
2400            up a domain controller, make sure that host lookups
2401            are enabled for the 'name resolve order'.  If host lookups
2402            are disabled and ads_only is True, then set the string to
2403            NULL. */
2404
2405         resolve_order = talloc_strdup(ctx, lp_name_resolve_order());
2406         if (!resolve_order) {
2407                 status = NT_STATUS_NO_MEMORY;
2408                 goto out;
2409         }
2410         strlower_m(resolve_order);
2411         if (lookup_type == DC_ADS_ONLY)  {
2412                 if (strstr( resolve_order, "host")) {
2413                         resolve_order = talloc_strdup(ctx, "ads");
2414
2415                         /* DNS SRV lookups used by the ads resolver
2416                            are already sorted by priority and weight */
2417                         *ordered = true;
2418                 } else {
2419                         resolve_order = talloc_strdup(ctx, "NULL");
2420                 }
2421         } else if (lookup_type == DC_KDC_ONLY) {
2422                 /* DNS SRV lookups used by the ads/kdc resolver
2423                    are already sorted by priority and weight */
2424                 *ordered = true;
2425                 resolve_order = talloc_strdup(ctx, "kdc");
2426         }
2427         if (!resolve_order) {
2428                 status = NT_STATUS_NO_MEMORY;
2429                 goto out;
2430         }
2431
2432         /* fetch the server we have affinity for.  Add the
2433            'password server' list to a search for our domain controllers */
2434
2435         saf_servername = saf_fetch( domain);
2436
2437         if (strequal(domain, lp_workgroup()) || strequal(domain, lp_realm())) {
2438                 pserver = talloc_asprintf(ctx, "%s, %s",
2439                         saf_servername ? saf_servername : "",
2440                         lp_passwordserver());
2441         } else {
2442                 pserver = talloc_asprintf(ctx, "%s, *",
2443                         saf_servername ? saf_servername : "");
2444         }
2445
2446         SAFE_FREE(saf_servername);
2447         if (!pserver) {
2448                 status = NT_STATUS_NO_MEMORY;
2449                 goto out;
2450         }
2451
2452         /* if we are starting from scratch, just lookup DOMAIN<0x1c> */
2453
2454         if (!*pserver ) {
2455                 DEBUG(10,("get_dc_list: no preferred domain controllers.\n"));
2456                 status = internal_resolve_name(domain, 0x1C, sitename, ip_list,
2457                                              count, resolve_order);
2458                 goto out;
2459         }
2460
2461         DEBUG(3,("get_dc_list: preferred server list: \"%s\"\n", pserver ));
2462
2463         /*
2464          * if '*' appears in the "password server" list then add
2465          * an auto lookup to the list of manually configured
2466          * DC's.  If any DC is listed by name, then the list should be
2467          * considered to be ordered
2468          */
2469
2470         p = pserver;
2471         while (next_token_talloc(ctx, &p, &name, LIST_SEP)) {
2472                 if (!done_auto_lookup && strequal(name, "*")) {
2473                         status = internal_resolve_name(domain, 0x1C, sitename,
2474                                                        &auto_ip_list,
2475                                                        &auto_count,
2476                                                        resolve_order);
2477                         if (NT_STATUS_IS_OK(status)) {
2478                                 num_addresses += auto_count;
2479                         }
2480                         done_auto_lookup = true;
2481                         DEBUG(8,("Adding %d DC's from auto lookup\n",
2482                                                 auto_count));
2483                 } else  {
2484                         num_addresses++;
2485                 }
2486         }
2487
2488         /* if we have no addresses and haven't done the auto lookup, then
2489            just return the list of DC's.  Or maybe we just failed. */
2490
2491         if ((num_addresses == 0)) {
2492                 if (done_auto_lookup) {
2493                         DEBUG(4,("get_dc_list: no servers found\n"));
2494                         status = NT_STATUS_NO_LOGON_SERVERS;
2495                         goto out;
2496                 }
2497                 status = internal_resolve_name(domain, 0x1C, sitename, ip_list,
2498                                              count, resolve_order);
2499                 goto out;
2500         }
2501
2502         if ((return_iplist = SMB_MALLOC_ARRAY(struct ip_service,
2503                                         num_addresses)) == NULL) {
2504                 DEBUG(3,("get_dc_list: malloc fail !\n"));
2505                 status = NT_STATUS_NO_MEMORY;
2506                 goto out;
2507         }
2508
2509         p = pserver;
2510         local_count = 0;
2511
2512         /* fill in the return list now with real IP's */
2513
2514         while ((local_count<num_addresses) &&
2515                         next_token_talloc(ctx, &p, &name, LIST_SEP)) {
2516                 struct sockaddr_storage name_ss;
2517
2518                 /* copy any addersses from the auto lookup */
2519
2520                 if (strequal(name, "*")) {
2521                         for (j=0; j<auto_count; j++) {
2522                                 char addr[INET6_ADDRSTRLEN];
2523                                 print_sockaddr(addr,
2524                                                 sizeof(addr),
2525                                                 &auto_ip_list[j].ss);
2526                                 /* Check for and don't copy any
2527                                  * known bad DC IP's. */
2528                                 if(!NT_STATUS_IS_OK(check_negative_conn_cache(
2529                                                 domain,
2530                                                 addr))) {
2531                                         DEBUG(5,("get_dc_list: "
2532                                                 "negative entry %s removed "
2533                                                 "from DC list\n",
2534                                                 addr));
2535                                         continue;
2536                                 }
2537                                 return_iplist[local_count].ss =
2538                                         auto_ip_list[j].ss;
2539                                 return_iplist[local_count].port =
2540                                         auto_ip_list[j].port;
2541                                 local_count++;
2542                         }
2543                         continue;
2544                 }
2545
2546                 /* added support for address:port syntax for ads
2547                  * (not that I think anyone will ever run the LDAP
2548                  * server in an AD domain on something other than
2549                  * port 389 */
2550
2551                 port = (lp_security() == SEC_ADS) ? LDAP_PORT : PORT_NONE;
2552                 if ((port_str=strchr(name, ':')) != NULL) {
2553                         *port_str = '\0';
2554                         port_str++;
2555                         port = atoi(port_str);
2556                 }
2557
2558                 /* explicit lookup; resolve_name() will
2559                  * handle names & IP addresses */
2560                 if (resolve_name( name, &name_ss, 0x20, true )) {
2561                         char addr[INET6_ADDRSTRLEN];
2562                         print_sockaddr(addr,
2563                                         sizeof(addr),
2564                                         &name_ss);
2565
2566                         /* Check for and don't copy any known bad DC IP's. */
2567                         if( !NT_STATUS_IS_OK(check_negative_conn_cache(domain,
2568                                                         addr)) ) {
2569                                 DEBUG(5,("get_dc_list: negative entry %s "
2570                                         "removed from DC list\n",
2571                                         name ));
2572                                 continue;
2573                         }
2574
2575                         return_iplist[local_count].ss = name_ss;
2576                         return_iplist[local_count].port = port;
2577                         local_count++;
2578                         *ordered = true;
2579                 }
2580         }
2581
2582         /* need to remove duplicates in the list if we have any
2583            explicit password servers */
2584
2585         if (local_count) {
2586                 local_count = remove_duplicate_addrs2(return_iplist,
2587                                 local_count );
2588         }
2589
2590         /* For DC's we always prioritize IPv4 due to W2K3 not
2591          * supporting LDAP, KRB5 or CLDAP over IPv6. */
2592
2593         if (local_count && return_iplist) {
2594                 prioritize_ipv4_list(return_iplist, local_count);
2595         }
2596
2597         if ( DEBUGLEVEL >= 4 ) {
2598                 DEBUG(4,("get_dc_list: returning %d ip addresses "
2599                                 "in an %sordered list\n",
2600                                 local_count,
2601                                 *ordered ? "":"un"));
2602                 DEBUG(4,("get_dc_list: "));
2603                 for ( i=0; i<local_count; i++ ) {
2604                         char addr[INET6_ADDRSTRLEN];
2605                         print_sockaddr(addr,
2606                                         sizeof(addr),
2607                                         &return_iplist[i].ss);
2608                         DEBUGADD(4,("%s:%d ", addr, return_iplist[i].port ));
2609                 }
2610                 DEBUGADD(4,("\n"));
2611         }
2612
2613         *ip_list = return_iplist;
2614         *count = local_count;
2615
2616         status = ( *count != 0 ? NT_STATUS_OK : NT_STATUS_NO_LOGON_SERVERS );
2617
2618   out:
2619
2620         if (!NT_STATUS_IS_OK(status)) {
2621                 SAFE_FREE(return_iplist);
2622                 *ip_list = NULL;
2623                 *count = 0;
2624         }
2625
2626         SAFE_FREE(auto_ip_list);
2627         TALLOC_FREE(ctx);
2628         return status;
2629 }
2630
2631 /*********************************************************************
2632  Small wrapper function to get the DC list and sort it if neccessary.
2633 *********************************************************************/
2634
2635 NTSTATUS get_sorted_dc_list( const char *domain,
2636                         const char *sitename,
2637                         struct ip_service **ip_list,
2638                         int *count,
2639                         bool ads_only )
2640 {
2641         bool ordered = false;
2642         NTSTATUS status;
2643         enum dc_lookup_type lookup_type = DC_NORMAL_LOOKUP;
2644
2645         *ip_list = NULL;
2646         *count = 0;
2647
2648         DEBUG(8,("get_sorted_dc_list: attempting lookup "
2649                 "for name %s (sitename %s) using [%s]\n",
2650                 domain,
2651                 sitename ? sitename : "NULL",
2652                 (ads_only ? "ads" : lp_name_resolve_order())));
2653
2654         if (ads_only) {
2655                 lookup_type = DC_ADS_ONLY;
2656         }
2657
2658         status = get_dc_list(domain, sitename, ip_list,
2659                         count, lookup_type, &ordered);
2660         if (NT_STATUS_EQUAL(status, NT_STATUS_NO_LOGON_SERVERS)
2661             && sitename) {
2662                 DEBUG(3,("get_sorted_dc_list: no server for name %s available"
2663                          " in site %s, fallback to all servers\n",
2664                          domain, sitename));
2665                 status = get_dc_list(domain, NULL, ip_list,
2666                                      count, lookup_type, &ordered);
2667         }
2668
2669         if (!NT_STATUS_IS_OK(status)) {
2670                 SAFE_FREE(*ip_list);
2671                 *count = 0;
2672                 return status;
2673         }
2674
2675         /* only sort if we don't already have an ordered list */
2676         if (!ordered) {
2677                 sort_service_list(*ip_list, *count);
2678         }
2679
2680         return NT_STATUS_OK;
2681 }
2682
2683 /*********************************************************************
2684  Get the KDC list - re-use all the logic in get_dc_list.
2685 *********************************************************************/
2686
2687 NTSTATUS get_kdc_list( const char *realm,
2688                         const char *sitename,
2689                         struct ip_service **ip_list,
2690                         int *count)
2691 {
2692         bool ordered;
2693         NTSTATUS status;
2694
2695         *count = 0;
2696         *ip_list = NULL;
2697
2698         status = get_dc_list(realm, sitename, ip_list,
2699                         count, DC_KDC_ONLY, &ordered);
2700
2701         if (!NT_STATUS_IS_OK(status)) {
2702                 SAFE_FREE(*ip_list);
2703                 *count = 0;
2704                 return status;
2705         }
2706
2707         /* only sort if we don't already have an ordered list */
2708         if ( !ordered ) {
2709                 sort_service_list(*ip_list, *count);
2710         }
2711
2712         return NT_STATUS_OK;
2713 }