source3/libsmb/smbsock_connect.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Connect to 445 and 139/nbsesssetup
   4    Copyright (C) Volker Lendecke 2010
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "../lib/async_req/async_sock.h"
  22 #include "../lib/util/tevent_ntstatus.h"
  23 #include "../lib/util/tevent_unix.h"
  24 #include "client.h"
  25 #include "async_smb.h"
  26 #include "../libcli/smb/read_smb.h"
  27 #include "libsmb/nmblib.h"
  28
  29 struct cli_session_request_state {
  30         struct tevent_context *ev;
  31         int sock;
  32         uint32 len_hdr;
  33         struct iovec iov[3];
  34         uint8_t nb_session_response;
  35 };
  36
  37 static void cli_session_request_sent(struct tevent_req *subreq);
  38 static void cli_session_request_recvd(struct tevent_req *subreq);
  39
  40 static struct tevent_req *cli_session_request_send(TALLOC_CTX *mem_ctx,
  41                                         struct tevent_context *ev,
  42                                         int sock,
  43                                         const struct nmb_name *called,
  44                                         const struct nmb_name *calling)
  45 {
  46         struct tevent_req *req, *subreq;
  47         struct cli_session_request_state *state;
  48
  49         req = tevent_req_create(mem_ctx, &state,
  50                                 struct cli_session_request_state);
  51         if (req == NULL) {
  52                 return NULL;
  53         }
  54         state->ev = ev;
  55         state->sock = sock;
  56
  57         state->iov[1].iov_base = name_mangle(
  58                 state, called->name, called->name_type);
  59         if (tevent_req_nomem(state->iov[1].iov_base, req)) {
  60                 return tevent_req_post(req, ev);
  61         }
  62         state->iov[1].iov_len = name_len(
  63                 (unsigned char *)state->iov[1].iov_base,
  64                 talloc_get_size(state->iov[1].iov_base));
  65
  66         state->iov[2].iov_base = name_mangle(
  67                 state, calling->name, calling->name_type);
  68         if (tevent_req_nomem(state->iov[2].iov_base, req)) {
  69                 return tevent_req_post(req, ev);
  70         }
  71         state->iov[2].iov_len = name_len(
  72                 (unsigned char *)state->iov[2].iov_base,
  73                 talloc_get_size(state->iov[2].iov_base));
  74
  75         _smb_setlen(((char *)&state->len_hdr),
  76                     state->iov[1].iov_len + state->iov[2].iov_len);
  77         SCVAL((char *)&state->len_hdr, 0, 0x81);
  78
  79         state->iov[0].iov_base = &state->len_hdr;
  80         state->iov[0].iov_len = sizeof(state->len_hdr);
  81
  82         subreq = writev_send(state, ev, NULL, sock, true, state->iov, 3);
  83         if (tevent_req_nomem(subreq, req)) {
  84                 return tevent_req_post(req, ev);
  85         }
  86         tevent_req_set_callback(subreq, cli_session_request_sent, req);
  87         return req;
  88 }
  89
  90 static void cli_session_request_sent(struct tevent_req *subreq)
  91 {
  92         struct tevent_req *req = tevent_req_callback_data(
  93                 subreq, struct tevent_req);
  94         struct cli_session_request_state *state = tevent_req_data(
  95                 req, struct cli_session_request_state);
  96         ssize_t ret;
  97         int err;
  98
  99         ret = writev_recv(subreq, &err);
 100         TALLOC_FREE(subreq);
 101         if (ret == -1) {
 102                 tevent_req_error(req, err);
 103                 return;
 104         }
 105         subreq = read_smb_send(state, state->ev, state->sock);
 106         if (tevent_req_nomem(subreq, req)) {
 107                 return;
 108         }
 109         tevent_req_set_callback(subreq, cli_session_request_recvd, req);
 110 }
 111
 112 static void cli_session_request_recvd(struct tevent_req *subreq)
 113 {
 114         struct tevent_req *req = tevent_req_callback_data(
 115                 subreq, struct tevent_req);
 116         struct cli_session_request_state *state = tevent_req_data(
 117                 req, struct cli_session_request_state);
 118         uint8_t *buf;
 119         ssize_t ret;
 120         int err;
 121
 122         ret = read_smb_recv(subreq, talloc_tos(), &buf, &err);
 123         TALLOC_FREE(subreq);
 124
 125         if (ret < 4) {
 126                 ret = -1;
 127                 err = EIO;
 128         }
 129         if (ret == -1) {
 130                 tevent_req_error(req, err);
 131                 return;
 132         }
 133         /*
 134          * In case of an error there is more information in the data
 135          * portion according to RFC1002. We're not subtle enough to
 136          * respond to the different error conditions, so drop the
 137          * error info here.
 138          */
 139         state->nb_session_response = CVAL(buf, 0);
 140         tevent_req_done(req);
 141 }
 142
 143 static bool cli_session_request_recv(struct tevent_req *req, int *err, uint8_t *resp)
 144 {
 145         struct cli_session_request_state *state = tevent_req_data(
 146                 req, struct cli_session_request_state);
 147
 148         if (tevent_req_is_unix_error(req, err)) {
 149                 return false;
 150         }
 151         *resp = state->nb_session_response;
 152         return true;
 153 }
 154
 155 struct nb_connect_state {
 156         struct tevent_context *ev;
 157         const struct sockaddr_storage *addr;
 158         const char *called_name;
 159         int sock;
 160
 161         struct nmb_name called;
 162         struct nmb_name calling;
 163 };
 164
 165 static int nb_connect_state_destructor(struct nb_connect_state *state);
 166 static void nb_connect_connected(struct tevent_req *subreq);
 167 static void nb_connect_done(struct tevent_req *subreq);
 168
 169 static struct tevent_req *nb_connect_send(TALLOC_CTX *mem_ctx,
 170                                           struct tevent_context *ev,
 171                                           const struct sockaddr_storage *addr,
 172                                           const char *called_name,
 173                                           int called_type,
 174                                           const char *calling_name,
 175                                           int calling_type)
 176 {
 177         struct tevent_req *req, *subreq;
 178         struct nb_connect_state *state;
 179
 180         req = tevent_req_create(mem_ctx, &state, struct nb_connect_state);
 181         if (req == NULL) {
 182                 return NULL;
 183         }
 184         state->ev = ev;
 185         state->called_name = called_name;
 186         state->addr = addr;
 187
 188         state->sock = -1;
 189         make_nmb_name(&state->called, called_name, called_type);
 190         make_nmb_name(&state->calling, calling_name, calling_type);
 191
 192         talloc_set_destructor(state, nb_connect_state_destructor);
 193
 194         subreq = open_socket_out_send(state, ev, addr, NBT_SMB_PORT, 5000);
 195         if (tevent_req_nomem(subreq, req)) {
 196                 return tevent_req_post(req, ev);
 197         }
 198         tevent_req_set_callback(subreq, nb_connect_connected, req);
 199         return req;
 200 }
 201
 202 static int nb_connect_state_destructor(struct nb_connect_state *state)
 203 {
 204         if (state->sock != -1) {
 205                 close(state->sock);
 206         }
 207         return 0;
 208 }
 209
 210 static void nb_connect_connected(struct tevent_req *subreq)
 211 {
 212         struct tevent_req *req = tevent_req_callback_data(
 213                 subreq, struct tevent_req);
 214         struct nb_connect_state *state = tevent_req_data(
 215                 req, struct nb_connect_state);
 216         NTSTATUS status;
 217
 218         status = open_socket_out_recv(subreq, &state->sock);
 219         TALLOC_FREE(subreq);
 220         if (!NT_STATUS_IS_OK(status)) {
 221                 tevent_req_nterror(req, status);
 222                 return;
 223         }
 224         subreq = cli_session_request_send(state, state->ev, state->sock,
 225                                           &state->called, &state->calling);
 226         if (tevent_req_nomem(subreq, req)) {
 227                 return;
 228         }
 229         tevent_req_set_callback(subreq, nb_connect_done, req);
 230 }
 231
 232 static void nb_connect_done(struct tevent_req *subreq)
 233 {
 234         struct tevent_req *req = tevent_req_callback_data(
 235                 subreq, struct tevent_req);
 236         struct nb_connect_state *state = tevent_req_data(
 237                 req, struct nb_connect_state);
 238         bool ret;
 239         int err;
 240         uint8_t resp;
 241
 242         ret = cli_session_request_recv(subreq, &err, &resp);
 243         TALLOC_FREE(subreq);
 244         if (!ret) {
 245                 tevent_req_nterror(req, map_nt_error_from_unix(err));
 246                 return;
 247         }
 248
 249         /*
 250          * RFC1002: 0x82 - POSITIVE SESSION RESPONSE
 251          */
 252
 253         if (resp != 0x82) {
 254                 /*
 255                  * The server did not like our session request
 256                  */
 257                 close(state->sock);
 258                 state->sock = -1;
 259
 260                 if (strequal(state->called_name, "*SMBSERVER")) {
 261                         /*
 262                          * Here we could try a name status request and
 263                          * use the first 0x20 type name.
 264                          */
 265                         tevent_req_nterror(
 266                                 req, NT_STATUS_RESOURCE_NAME_NOT_FOUND);
 267                         return;
 268                 }
 269
 270                 /*
 271                  * We could be subtle and distinguish between
 272                  * different failure modes, but what we do here
 273                  * instead is just retry with *SMBSERVER type 0x20.
 274                  */
 275                 state->called_name = "*SMBSERVER";
 276                 make_nmb_name(&state->called, state->called_name, 0x20);
 277
 278                 subreq = open_socket_out_send(state, state->ev, state->addr,
 279                                               NBT_SMB_PORT, 5000);
 280                 if (tevent_req_nomem(subreq, req)) {
 281                         return;
 282                 }
 283                 tevent_req_set_callback(subreq, nb_connect_connected, req);
 284                 return;
 285         }
 286
 287         tevent_req_done(req);
 288         return;
 289
 290 }
 291
 292 static NTSTATUS nb_connect_recv(struct tevent_req *req, int *sock)
 293 {
 294         struct nb_connect_state *state = tevent_req_data(
 295                 req, struct nb_connect_state);
 296         NTSTATUS status;
 297
 298         if (tevent_req_is_nterror(req, &status)) {
 299                 return status;
 300         }
 301         *sock = state->sock;
 302         state->sock = -1;
 303         return NT_STATUS_OK;
 304 }
 305
 306 struct smbsock_connect_state {
 307         struct tevent_context *ev;
 308         const struct sockaddr_storage *addr;
 309         const char *called_name;
 310         uint8_t called_type;
 311         const char *calling_name;
 312         uint8_t calling_type;
 313         struct tevent_req *req_139;
 314         struct tevent_req *req_445;
 315         int sock;
 316         uint16_t port;
 317 };
 318
 319 static int smbsock_connect_state_destructor(
 320         struct smbsock_connect_state *state);
 321 static void smbsock_connect_connected(struct tevent_req *subreq);
 322 static void smbsock_connect_do_139(struct tevent_req *subreq);
 323
 324 struct tevent_req *smbsock_connect_send(TALLOC_CTX *mem_ctx,
 325                                         struct tevent_context *ev,
 326                                         const struct sockaddr_storage *addr,
 327                                         uint16_t port,
 328                                         const char *called_name,
 329                                         int called_type,
 330                                         const char *calling_name,
 331                                         int calling_type)
 332 {
 333         struct tevent_req *req, *subreq;
 334         struct smbsock_connect_state *state;
 335
 336         req = tevent_req_create(mem_ctx, &state, struct smbsock_connect_state);
 337         if (req == NULL) {
 338                 return NULL;
 339         }
 340         state->ev = ev;
 341         state->addr = addr;
 342         state->sock = -1;
 343         state->called_name =
 344                 (called_name != NULL) ? called_name : "*SMBSERVER";
 345         state->called_type =
 346                 (called_type != -1) ? called_type : 0x20;
 347         state->calling_name =
 348                 (calling_name != NULL) ? calling_name : lp_netbios_name();
 349         state->calling_type =
 350                 (calling_type != -1) ? calling_type : 0x00;
 351
 352         talloc_set_destructor(state, smbsock_connect_state_destructor);
 353
 354         if (port == NBT_SMB_PORT) {
 355                 subreq = tevent_wakeup_send(state, ev, timeval_set(0, 0));
 356                 if (tevent_req_nomem(subreq, req)) {
 357                         return tevent_req_post(req, ev);
 358                 }
 359                 tevent_req_set_callback(subreq, smbsock_connect_do_139, req);
 360                 return req;
 361         }
 362         if (port != 0) {
 363                 state->req_445 = open_socket_out_send(state, ev, addr, port,
 364                                                       5000);
 365                 if (tevent_req_nomem(state->req_445, req)) {
 366                         return tevent_req_post(req, ev);
 367                 }
 368                 tevent_req_set_callback(
 369                         state->req_445, smbsock_connect_connected, req);
 370                 return req;
 371         }
 372
 373         /*
 374          * port==0, try both
 375          */
 376
 377         state->req_445 = open_socket_out_send(state, ev, addr, TCP_SMB_PORT, 5000);
 378         if (tevent_req_nomem(state->req_445, req)) {
 379                 return tevent_req_post(req, ev);
 380         }
 381         tevent_req_set_callback(state->req_445, smbsock_connect_connected,
 382                                 req);
 383
 384         /*
 385          * After 5 msecs, fire the 139 (NBT) request
 386          */
 387         state->req_139 = tevent_wakeup_send(
 388                 state, ev, timeval_current_ofs(0, 5000));
 389         if (tevent_req_nomem(state->req_139, req)) {
 390                 TALLOC_FREE(state->req_445);
 391                 return tevent_req_post(req, ev);
 392         }
 393         tevent_req_set_callback(state->req_139, smbsock_connect_do_139,
 394                                 req);
 395         return req;
 396 }
 397
 398 static int smbsock_connect_state_destructor(
 399         struct smbsock_connect_state *state)
 400 {
 401         if (state->sock != -1) {
 402                 close(state->sock);
 403                 state->sock = -1;
 404         }
 405         return 0;
 406 }
 407
 408 static void smbsock_connect_do_139(struct tevent_req *subreq)
 409 {
 410         struct tevent_req *req = tevent_req_callback_data(
 411                 subreq, struct tevent_req);
 412         struct smbsock_connect_state *state = tevent_req_data(
 413                 req, struct smbsock_connect_state);
 414         bool ret;
 415
 416         ret = tevent_wakeup_recv(subreq);
 417         TALLOC_FREE(subreq);
 418         if (!ret) {
 419                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 420                 return;
 421         }
 422         state->req_139 = nb_connect_send(state, state->ev, state->addr,
 423                                          state->called_name,
 424                                          state->called_type,
 425                                          state->calling_name,
 426                                          state->calling_type);
 427         if (tevent_req_nomem(state->req_139, req)) {
 428                 return;
 429         }
 430         tevent_req_set_callback(state->req_139, smbsock_connect_connected,
 431                                 req);
 432 }
 433
 434 static void smbsock_connect_connected(struct tevent_req *subreq)
 435 {
 436         struct tevent_req *req = tevent_req_callback_data(
 437                 subreq, struct tevent_req);
 438         struct smbsock_connect_state *state = tevent_req_data(
 439                 req, struct smbsock_connect_state);
 440         struct tevent_req *unfinished_req;
 441         NTSTATUS status;
 442
 443         if (subreq == state->req_445) {
 444
 445                 status = open_socket_out_recv(subreq, &state->sock);
 446                 TALLOC_FREE(state->req_445);
 447                 unfinished_req = state->req_139;
 448                 state->port = TCP_SMB_PORT;
 449
 450         } else if (subreq == state->req_139) {
 451
 452                 status = nb_connect_recv(subreq, &state->sock);
 453                 TALLOC_FREE(state->req_139);
 454                 unfinished_req = state->req_445;
 455                 state->port = NBT_SMB_PORT;
 456
 457         } else {
 458                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 459                 return;
 460         }
 461
 462         if (NT_STATUS_IS_OK(status)) {
 463                 TALLOC_FREE(unfinished_req);
 464                 state->req_139 = NULL;
 465                 state->req_445 = NULL;
 466                 tevent_req_done(req);
 467                 return;
 468         }
 469         if (unfinished_req == NULL) {
 470                 /*
 471                  * Both requests failed
 472                  */
 473                 tevent_req_nterror(req, status);
 474                 return;
 475         }
 476         /*
 477          * Do nothing, wait for the second request to come here.
 478          */
 479 }
 480
 481 NTSTATUS smbsock_connect_recv(struct tevent_req *req, int *sock,
 482                               uint16_t *ret_port)
 483 {
 484         struct smbsock_connect_state *state = tevent_req_data(
 485                 req, struct smbsock_connect_state);
 486         NTSTATUS status;
 487
 488         if (tevent_req_is_nterror(req, &status)) {
 489                 return status;
 490         }
 491         *sock = state->sock;
 492         state->sock = -1;
 493         if (ret_port != NULL) {
 494                 *ret_port = state->port;
 495         }
 496         return NT_STATUS_OK;
 497 }
 498
 499 NTSTATUS smbsock_connect(const struct sockaddr_storage *addr, uint16_t port,
 500                          const char *called_name, int called_type,
 501                          const char *calling_name, int calling_type,
 502                          int *pfd, uint16_t *ret_port, int sec_timeout)
 503 {
 504         TALLOC_CTX *frame = talloc_stackframe();
 505         struct tevent_context *ev;
 506         struct tevent_req *req;
 507         NTSTATUS status = NT_STATUS_NO_MEMORY;
 508
 509         ev = tevent_context_init(frame);
 510         if (ev == NULL) {
 511                 goto fail;
 512         }
 513         req = smbsock_connect_send(frame, ev, addr, port,
 514                                    called_name, called_type,
 515                                    calling_name, calling_type);
 516         if (req == NULL) {
 517                 goto fail;
 518         }
 519         if ((sec_timeout != 0) &&
 520             !tevent_req_set_endtime(
 521                     req, ev, timeval_current_ofs(sec_timeout, 0))) {
 522                 goto fail;
 523         }
 524         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 525                 goto fail;
 526         }
 527         status = smbsock_connect_recv(req, pfd, ret_port);
 528  fail:
 529         TALLOC_FREE(frame);
 530         return status;
 531 }
 532
 533 struct smbsock_any_connect_state {
 534         struct tevent_context *ev;
 535         const struct sockaddr_storage *addrs;
 536         const char **called_names;
 537         int *called_types;
 538         const char **calling_names;
 539         int *calling_types;
 540         size_t num_addrs;
 541         uint16_t port;
 542
 543         struct tevent_req **requests;
 544         size_t num_sent;
 545         size_t num_received;
 546
 547         int fd;
 548         uint16_t chosen_port;
 549         size_t chosen_index;
 550 };
 551
 552 static bool smbsock_any_connect_send_next(
 553         struct tevent_req *req, struct smbsock_any_connect_state *state);
 554 static void smbsock_any_connect_trynext(struct tevent_req *subreq);
 555 static void smbsock_any_connect_connected(struct tevent_req *subreq);
 556
 557 struct tevent_req *smbsock_any_connect_send(TALLOC_CTX *mem_ctx,
 558                                             struct tevent_context *ev,
 559                                             const struct sockaddr_storage *addrs,
 560                                             const char **called_names,
 561                                             int *called_types,
 562                                             const char **calling_names,
 563                                             int *calling_types,
 564                                             size_t num_addrs, uint16_t port)
 565 {
 566         struct tevent_req *req, *subreq;
 567         struct smbsock_any_connect_state *state;
 568
 569         req = tevent_req_create(mem_ctx, &state,
 570                                 struct smbsock_any_connect_state);
 571         if (req == NULL) {
 572                 return NULL;
 573         }
 574         state->ev = ev;
 575         state->addrs = addrs;
 576         state->num_addrs = num_addrs;
 577         state->called_names = called_names;
 578         state->called_types = called_types;
 579         state->calling_names = calling_names;
 580         state->calling_types = calling_types;
 581         state->port = port;
 582
 583         if (num_addrs == 0) {
 584                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 585                 return tevent_req_post(req, ev);
 586         }
 587
 588         state->requests = talloc_zero_array(state, struct tevent_req *,
 589                                             num_addrs);
 590         if (tevent_req_nomem(state->requests, req)) {
 591                 return tevent_req_post(req, ev);
 592         }
 593         if (!smbsock_any_connect_send_next(req, state)) {
 594                 return tevent_req_post(req, ev);
 595         }
 596         if (state->num_sent >= state->num_addrs) {
 597                 return req;
 598         }
 599         subreq = tevent_wakeup_send(state, ev, timeval_current_ofs(0, 10000));
 600         if (tevent_req_nomem(subreq, req)) {
 601                 return tevent_req_post(req, ev);
 602         }
 603         tevent_req_set_callback(subreq, smbsock_any_connect_trynext, req);
 604         return req;
 605 }
 606
 607 static void smbsock_any_connect_trynext(struct tevent_req *subreq)
 608 {
 609         struct tevent_req *req = tevent_req_callback_data(
 610                 subreq, struct tevent_req);
 611         struct smbsock_any_connect_state *state = tevent_req_data(
 612                 req, struct smbsock_any_connect_state);
 613         bool ret;
 614
 615         ret = tevent_wakeup_recv(subreq);
 616         TALLOC_FREE(subreq);
 617         if (!ret) {
 618                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 619                 return;
 620         }
 621         if (!smbsock_any_connect_send_next(req, state)) {
 622                 return;
 623         }
 624         if (state->num_sent >= state->num_addrs) {
 625                 return;
 626         }
 627         subreq = tevent_wakeup_send(state, state->ev,
 628                                     tevent_timeval_set(0, 10000));
 629         if (tevent_req_nomem(subreq, req)) {
 630                 return;
 631         }
 632         tevent_req_set_callback(subreq, smbsock_any_connect_trynext, req);
 633 }
 634
 635 static bool smbsock_any_connect_send_next(
 636         struct tevent_req *req, struct smbsock_any_connect_state *state)
 637 {
 638         struct tevent_req *subreq;
 639
 640         if (state->num_sent >= state->num_addrs) {
 641                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 642                 return false;
 643         }
 644         subreq = smbsock_connect_send(
 645                 state->requests, state->ev, &state->addrs[state->num_sent],
 646                 state->port,
 647                 (state->called_names != NULL)
 648                 ? state->called_names[state->num_sent] : NULL,
 649                 (state->called_types != NULL)
 650                 ? state->called_types[state->num_sent] : -1,
 651                 (state->calling_names != NULL)
 652                 ? state->calling_names[state->num_sent] : NULL,
 653                 (state->calling_types != NULL)
 654                 ? state->calling_types[state->num_sent] : -1);
 655         if (tevent_req_nomem(subreq, req)) {
 656                 return false;
 657         }
 658         tevent_req_set_callback(subreq, smbsock_any_connect_connected, req);
 659
 660         state->requests[state->num_sent] = subreq;
 661         state->num_sent += 1;
 662
 663         return true;
 664 }
 665
 666 static void smbsock_any_connect_connected(struct tevent_req *subreq)
 667 {
 668         struct tevent_req *req = tevent_req_callback_data(
 669                 subreq, struct tevent_req);
 670         struct smbsock_any_connect_state *state = tevent_req_data(
 671                 req, struct smbsock_any_connect_state);
 672         NTSTATUS status;
 673         int fd;
 674         uint16_t chosen_port;
 675         size_t i;
 676         size_t chosen_index = 0;
 677
 678         for (i=0; i<state->num_sent; i++) {
 679                 if (state->requests[i] == subreq) {
 680                         chosen_index = i;
 681                         break;
 682                 }
 683         }
 684         if (i == state->num_sent) {
 685                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 686                 return;
 687         }
 688
 689         status = smbsock_connect_recv(subreq, &fd, &chosen_port);
 690
 691         TALLOC_FREE(subreq);
 692         state->requests[chosen_index] = NULL;
 693
 694         if (NT_STATUS_IS_OK(status)) {
 695                 /*
 696                  * This will kill all the other requests
 697                  */
 698                 TALLOC_FREE(state->requests);
 699                 state->fd = fd;
 700                 state->chosen_port = chosen_port;
 701                 state->chosen_index = chosen_index;
 702                 tevent_req_done(req);
 703                 return;
 704         }
 705
 706         state->num_received += 1;
 707         if (state->num_received < state->num_addrs) {
 708                 /*
 709                  * More addrs pending, wait for the others
 710                  */
 711                 return;
 712         }
 713
 714         /*
 715          * This is the last response, none succeeded.
 716          */
 717         tevent_req_nterror(req, status);
 718         return;
 719 }
 720
 721 NTSTATUS smbsock_any_connect_recv(struct tevent_req *req, int *pfd,
 722                                   size_t *chosen_index,
 723                                   uint16_t *chosen_port)
 724 {
 725         struct smbsock_any_connect_state *state = tevent_req_data(
 726                 req, struct smbsock_any_connect_state);
 727         NTSTATUS status;
 728
 729         if (tevent_req_is_nterror(req, &status)) {
 730                 return status;
 731         }
 732         *pfd = state->fd;
 733         if (chosen_index != NULL) {
 734                 *chosen_index = state->chosen_index;
 735         }
 736         if (chosen_port != NULL) {
 737                 *chosen_port = state->chosen_port;
 738         }
 739         return NT_STATUS_OK;
 740 }
 741
 742 NTSTATUS smbsock_any_connect(const struct sockaddr_storage *addrs,
 743                              const char **called_names,
 744                              int *called_types,
 745                              const char **calling_names,
 746                              int *calling_types,
 747                              size_t num_addrs,
 748                              uint16_t port,
 749                              int sec_timeout,
 750                              int *pfd, size_t *chosen_index,
 751                              uint16_t *chosen_port)
 752 {
 753         TALLOC_CTX *frame = talloc_stackframe();
 754         struct tevent_context *ev;
 755         struct tevent_req *req;
 756         NTSTATUS status = NT_STATUS_NO_MEMORY;
 757
 758         ev = tevent_context_init(frame);
 759         if (ev == NULL) {
 760                 goto fail;
 761         }
 762         req = smbsock_any_connect_send(frame, ev, addrs,
 763                                        called_names, called_types,
 764                                        calling_names, calling_types,
 765                                        num_addrs, port);
 766         if (req == NULL) {
 767                 goto fail;
 768         }
 769         if ((sec_timeout != 0) &&
 770             !tevent_req_set_endtime(
 771                     req, ev, timeval_current_ofs(sec_timeout, 0))) {
 772                 goto fail;
 773         }
 774         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 775                 goto fail;
 776         }
 777         status = smbsock_any_connect_recv(req, pfd, chosen_index, chosen_port);
 778  fail:
 779         TALLOC_FREE(frame);
 780         return status;
 781 }