libcli/smb/smbXcli_base.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Infrastructure for async SMB client requests
   4    Copyright (C) Volker Lendecke 2008
   5    Copyright (C) Stefan Metzmacher 2011
   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 "system/network.h"
  23 #include "../lib/async_req/async_sock.h"
  24 #include "../lib/util/tevent_ntstatus.h"
  25 #include "../lib/util/tevent_unix.h"
  26 #include "lib/util/util_net.h"
  27 #include "lib/util/dlinklist.h"
  28 #include "../libcli/smb/smb_common.h"
  29 #include "../libcli/smb/smb_seal.h"
  30 #include "../libcli/smb/smb_signing.h"
  31 #include "../libcli/smb/read_smb.h"
  32 #include "smbXcli_base.h"
  33 #include "librpc/ndr/libndr.h"
  34
  35 struct smbXcli_conn;
  36 struct smbXcli_req;
  37 struct smbXcli_session;
  38
  39 struct smbXcli_conn {
  40         int read_fd;
  41         int write_fd;
  42         struct sockaddr_storage local_ss;
  43         struct sockaddr_storage remote_ss;
  44         const char *remote_name;
  45
  46         struct tevent_queue *outgoing;
  47         struct tevent_req **pending;
  48         struct tevent_req *read_smb_req;
  49
  50         enum protocol_types protocol;
  51         bool allow_signing;
  52         bool desire_signing;
  53         bool mandatory_signing;
  54
  55         /*
  56          * The incoming dispatch function should return:
  57          * - NT_STATUS_RETRY, if more incoming PDUs are expected.
  58          * - NT_STATUS_OK, if no more processing is desired, e.g.
  59          *                 the dispatch function called
  60          *                 tevent_req_done().
  61          * - All other return values disconnect the connection.
  62          */
  63         NTSTATUS (*dispatch_incoming)(struct smbXcli_conn *conn,
  64                                       TALLOC_CTX *tmp_mem,
  65                                       uint8_t *inbuf);
  66
  67         struct {
  68                 struct {
  69                         uint32_t capabilities;
  70                         uint32_t max_xmit;
  71                 } client;
  72
  73                 struct {
  74                         uint32_t capabilities;
  75                         uint32_t max_xmit;
  76                         uint16_t max_mux;
  77                         uint16_t security_mode;
  78                         bool readbraw;
  79                         bool writebraw;
  80                         bool lockread;
  81                         bool writeunlock;
  82                         uint32_t session_key;
  83                         struct GUID guid;
  84                         DATA_BLOB gss_blob;
  85                         uint8_t challenge[8];
  86                         const char *workgroup;
  87                         const char *name;
  88                         int time_zone;
  89                         NTTIME system_time;
  90                 } server;
  91
  92                 uint32_t capabilities;
  93                 uint32_t max_xmit;
  94
  95                 uint16_t mid;
  96
  97                 struct smb_signing_state *signing;
  98                 struct smb_trans_enc_state *trans_enc;
  99
 100                 struct tevent_req *read_braw_req;
 101         } smb1;
 102
 103         struct {
 104                 struct {
 105                         uint16_t security_mode;
 106                         struct GUID guid;
 107                 } client;
 108
 109                 struct {
 110                         uint32_t capabilities;
 111                         uint16_t security_mode;
 112                         struct GUID guid;
 113                         uint32_t max_trans_size;
 114                         uint32_t max_read_size;
 115                         uint32_t max_write_size;
 116                         NTTIME system_time;
 117                         NTTIME start_time;
 118                         DATA_BLOB gss_blob;
 119                 } server;
 120
 121                 uint64_t mid;
 122                 uint16_t cur_credits;
 123                 uint16_t max_credits;
 124         } smb2;
 125
 126         struct smbXcli_session *sessions;
 127 };
 128
 129 struct smbXcli_session {
 130         struct smbXcli_session *prev, *next;
 131         struct smbXcli_conn *conn;
 132
 133         struct {
 134                 uint64_t session_id;
 135                 uint16_t session_flags;
 136                 DATA_BLOB signing_key;
 137                 DATA_BLOB session_key;
 138                 bool should_sign;
 139                 bool channel_setup;
 140         } smb2;
 141 };
 142
 143 struct smbXcli_req_state {
 144         struct tevent_context *ev;
 145         struct smbXcli_conn *conn;
 146         struct smbXcli_session *session; /* maybe NULL */
 147
 148         uint8_t length_hdr[4];
 149
 150         bool one_way;
 151
 152         uint8_t *inbuf;
 153
 154         struct {
 155                 /* Space for the header including the wct */
 156                 uint8_t hdr[HDR_VWV];
 157
 158                 /*
 159                  * For normal requests, smb1cli_req_send chooses a mid.
 160                  * SecondaryV trans requests need to use the mid of the primary
 161                  * request, so we need a place to store it.
 162                  * Assume it is set if != 0.
 163                  */
 164                 uint16_t mid;
 165
 166                 uint16_t *vwv;
 167                 uint8_t bytecount_buf[2];
 168
 169 #define MAX_SMB_IOV 10
 170                 /* length_hdr, hdr, words, byte_count, buffers */
 171                 struct iovec iov[1 + 3 + MAX_SMB_IOV];
 172                 int iov_count;
 173
 174                 bool one_way_seqnum;
 175                 uint32_t seqnum;
 176                 struct tevent_req **chained_requests;
 177
 178                 uint8_t recv_cmd;
 179                 NTSTATUS recv_status;
 180                 /* always an array of 3 talloc elements */
 181                 struct iovec *recv_iov;
 182         } smb1;
 183
 184         struct {
 185                 const uint8_t *fixed;
 186                 uint16_t fixed_len;
 187                 const uint8_t *dyn;
 188                 uint32_t dyn_len;
 189
 190                 uint8_t hdr[64];
 191                 uint8_t pad[7]; /* padding space for compounding */
 192
 193                 /* always an array of 3 talloc elements */
 194                 struct iovec *recv_iov;
 195
 196                 uint16_t credit_charge;
 197
 198                 bool signing_skipped;
 199                 bool notify_async;
 200                 bool got_async;
 201         } smb2;
 202 };
 203
 204 static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
 205 {
 206         /*
 207          * NT_STATUS_OK, means we do not notify the callers
 208          */
 209         smbXcli_conn_disconnect(conn, NT_STATUS_OK);
 210
 211         while (conn->sessions) {
 212                 conn->sessions->conn = NULL;
 213                 DLIST_REMOVE(conn->sessions, conn->sessions);
 214         }
 215
 216         if (conn->smb1.trans_enc) {
 217                 common_free_encryption_state(&conn->smb1.trans_enc);
 218         }
 219
 220         return 0;
 221 }
 222
 223 struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
 224                                          int fd,
 225                                          const char *remote_name,
 226                                          enum smb_signing_setting signing_state,
 227                                          uint32_t smb1_capabilities,
 228                                          struct GUID *client_guid)
 229 {
 230         struct smbXcli_conn *conn = NULL;
 231         void *ss = NULL;
 232         struct sockaddr *sa = NULL;
 233         socklen_t sa_length;
 234         int ret;
 235
 236         conn = talloc_zero(mem_ctx, struct smbXcli_conn);
 237         if (!conn) {
 238                 return NULL;
 239         }
 240
 241         conn->read_fd = fd;
 242         conn->write_fd = dup(fd);
 243         if (conn->write_fd == -1) {
 244                 goto error;
 245         }
 246
 247         conn->remote_name = talloc_strdup(conn, remote_name);
 248         if (conn->remote_name == NULL) {
 249                 goto error;
 250         }
 251
 252
 253         ss = (void *)&conn->local_ss;
 254         sa = (struct sockaddr *)ss;
 255         sa_length = sizeof(conn->local_ss);
 256         ret = getsockname(fd, sa, &sa_length);
 257         if (ret == -1) {
 258                 goto error;
 259         }
 260         ss = (void *)&conn->remote_ss;
 261         sa = (struct sockaddr *)ss;
 262         sa_length = sizeof(conn->remote_ss);
 263         ret = getpeername(fd, sa, &sa_length);
 264         if (ret == -1) {
 265                 goto error;
 266         }
 267
 268         conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
 269         if (conn->outgoing == NULL) {
 270                 goto error;
 271         }
 272         conn->pending = NULL;
 273
 274         conn->protocol = PROTOCOL_NONE;
 275
 276         switch (signing_state) {
 277         case SMB_SIGNING_OFF:
 278                 /* never */
 279                 conn->allow_signing = false;
 280                 conn->desire_signing = false;
 281                 conn->mandatory_signing = false;
 282                 break;
 283         case SMB_SIGNING_DEFAULT:
 284         case SMB_SIGNING_IF_REQUIRED:
 285                 /* if the server requires it */
 286                 conn->allow_signing = true;
 287                 conn->desire_signing = false;
 288                 conn->mandatory_signing = false;
 289                 break;
 290         case SMB_SIGNING_REQUIRED:
 291                 /* always */
 292                 conn->allow_signing = true;
 293                 conn->desire_signing = true;
 294                 conn->mandatory_signing = true;
 295                 break;
 296         }
 297
 298         conn->smb1.client.capabilities = smb1_capabilities;
 299         conn->smb1.client.max_xmit = UINT16_MAX;
 300
 301         conn->smb1.capabilities = conn->smb1.client.capabilities;
 302         conn->smb1.max_xmit = 1024;
 303
 304         conn->smb1.mid = 1;
 305
 306         /* initialise signing */
 307         conn->smb1.signing = smb_signing_init(conn,
 308                                               conn->allow_signing,
 309                                               conn->desire_signing,
 310                                               conn->mandatory_signing);
 311         if (!conn->smb1.signing) {
 312                 goto error;
 313         }
 314
 315         conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
 316         if (conn->mandatory_signing) {
 317                 conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
 318         }
 319         if (client_guid) {
 320                 conn->smb2.client.guid = *client_guid;
 321         }
 322
 323         conn->smb2.cur_credits = 1;
 324         conn->smb2.max_credits = 0;
 325
 326         talloc_set_destructor(conn, smbXcli_conn_destructor);
 327         return conn;
 328
 329  error:
 330         if (conn->write_fd != -1) {
 331                 close(conn->write_fd);
 332         }
 333         TALLOC_FREE(conn);
 334         return NULL;
 335 }
 336
 337 bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
 338 {
 339         if (conn == NULL) {
 340                 return false;
 341         }
 342
 343         if (conn->read_fd == -1) {
 344                 return false;
 345         }
 346
 347         return true;
 348 }
 349
 350 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
 351 {
 352         return conn->protocol;
 353 }
 354
 355 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
 356 {
 357         if (conn->protocol >= PROTOCOL_SMB2_02) {
 358                 return true;
 359         }
 360
 361         if (conn->smb1.capabilities & CAP_UNICODE) {
 362                 return true;
 363         }
 364
 365         return false;
 366 }
 367
 368 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
 369 {
 370         set_socket_options(conn->read_fd, options);
 371 }
 372
 373 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
 374 {
 375         return &conn->local_ss;
 376 }
 377
 378 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
 379 {
 380         return &conn->remote_ss;
 381 }
 382
 383 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
 384 {
 385         return conn->remote_name;
 386 }
 387
 388 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
 389 {
 390         if (conn->protocol >= PROTOCOL_SMB2_02) {
 391                 /*
 392                  * TODO...
 393                  */
 394                 return 1;
 395         }
 396
 397         return conn->smb1.server.max_mux;
 398 }
 399
 400 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
 401 {
 402         if (conn->protocol >= PROTOCOL_SMB2_02) {
 403                 return conn->smb2.server.system_time;
 404         }
 405
 406         return conn->smb1.server.system_time;
 407 }
 408
 409 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
 410 {
 411         if (conn->protocol >= PROTOCOL_SMB2_02) {
 412                 return &conn->smb2.server.gss_blob;
 413         }
 414
 415         return &conn->smb1.server.gss_blob;
 416 }
 417
 418 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
 419 {
 420         if (conn->protocol >= PROTOCOL_SMB2_02) {
 421                 return &conn->smb2.server.guid;
 422         }
 423
 424         return &conn->smb1.server.guid;
 425 }
 426
 427 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
 428 {
 429         return conn->smb1.capabilities;
 430 }
 431
 432 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
 433 {
 434         return conn->smb1.max_xmit;
 435 }
 436
 437 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
 438 {
 439         return conn->smb1.server.session_key;
 440 }
 441
 442 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
 443 {
 444         return conn->smb1.server.challenge;
 445 }
 446
 447 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
 448 {
 449         return conn->smb1.server.security_mode;
 450 }
 451
 452 bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
 453 {
 454         return conn->smb1.server.readbraw;
 455 }
 456
 457 bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
 458 {
 459         return conn->smb1.server.writebraw;
 460 }
 461
 462 bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
 463 {
 464         return conn->smb1.server.lockread;
 465 }
 466
 467 bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
 468 {
 469         return conn->smb1.server.writeunlock;
 470 }
 471
 472 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
 473 {
 474         return conn->smb1.server.time_zone;
 475 }
 476
 477 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
 478                                    const DATA_BLOB user_session_key,
 479                                    const DATA_BLOB response)
 480 {
 481         return smb_signing_activate(conn->smb1.signing,
 482                                     user_session_key,
 483                                     response);
 484 }
 485
 486 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
 487                                 const uint8_t *buf, uint32_t seqnum)
 488 {
 489         return smb_signing_check_pdu(conn->smb1.signing, buf, seqnum);
 490 }
 491
 492 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
 493 {
 494         return smb_signing_is_active(conn->smb1.signing);
 495 }
 496
 497 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
 498                                  struct smb_trans_enc_state *es)
 499 {
 500         /* Replace the old state, if any. */
 501         if (conn->smb1.trans_enc) {
 502                 common_free_encryption_state(&conn->smb1.trans_enc);
 503         }
 504         conn->smb1.trans_enc = es;
 505 }
 506
 507 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
 508 {
 509         return common_encryption_on(conn->smb1.trans_enc);
 510 }
 511
 512
 513 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
 514 {
 515         uint32_t flags2 = SVAL(hdr, HDR_FLG2);
 516         NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
 517
 518         if (NT_STATUS_IS_OK(status)) {
 519                 return NT_STATUS_OK;
 520         }
 521
 522         if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
 523                 return status;
 524         }
 525
 526         return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
 527 }
 528
 529 /**
 530  * Is the SMB command able to hold an AND_X successor
 531  * @param[in] cmd       The SMB command in question
 532  * @retval Can we add a chained request after "cmd"?
 533  */
 534 bool smb1cli_is_andx_req(uint8_t cmd)
 535 {
 536         switch (cmd) {
 537         case SMBtconX:
 538         case SMBlockingX:
 539         case SMBopenX:
 540         case SMBreadX:
 541         case SMBwriteX:
 542         case SMBsesssetupX:
 543         case SMBulogoffX:
 544         case SMBntcreateX:
 545                 return true;
 546                 break;
 547         default:
 548                 break;
 549         }
 550
 551         return false;
 552 }
 553
 554 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
 555 {
 556         size_t num_pending = talloc_array_length(conn->pending);
 557         uint16_t result;
 558
 559         while (true) {
 560                 size_t i;
 561
 562                 result = conn->smb1.mid++;
 563                 if ((result == 0) || (result == 0xffff)) {
 564                         continue;
 565                 }
 566
 567                 for (i=0; i<num_pending; i++) {
 568                         if (result == smb1cli_req_mid(conn->pending[i])) {
 569                                 break;
 570                         }
 571                 }
 572
 573                 if (i == num_pending) {
 574                         return result;
 575                 }
 576         }
 577 }
 578
 579 void smbXcli_req_unset_pending(struct tevent_req *req)
 580 {
 581         struct smbXcli_req_state *state =
 582                 tevent_req_data(req,
 583                 struct smbXcli_req_state);
 584         struct smbXcli_conn *conn = state->conn;
 585         size_t num_pending = talloc_array_length(conn->pending);
 586         size_t i;
 587
 588         if (state->smb1.mid != 0) {
 589                 /*
 590                  * This is a [nt]trans[2] request which waits
 591                  * for more than one reply.
 592                  */
 593                 return;
 594         }
 595
 596         talloc_set_destructor(req, NULL);
 597
 598         if (num_pending == 1) {
 599                 /*
 600                  * The pending read_smb tevent_req is a child of
 601                  * conn->pending. So if nothing is pending anymore, we need to
 602                  * delete the socket read fde.
 603                  */
 604                 TALLOC_FREE(conn->pending);
 605                 conn->read_smb_req = NULL;
 606                 return;
 607         }
 608
 609         for (i=0; i<num_pending; i++) {
 610                 if (req == conn->pending[i]) {
 611                         break;
 612                 }
 613         }
 614         if (i == num_pending) {
 615                 /*
 616                  * Something's seriously broken. Just returning here is the
 617                  * right thing nevertheless, the point of this routine is to
 618                  * remove ourselves from conn->pending.
 619                  */
 620                 return;
 621         }
 622
 623         /*
 624          * Remove ourselves from the conn->pending array
 625          */
 626         for (; i < (num_pending - 1); i++) {
 627                 conn->pending[i] = conn->pending[i+1];
 628         }
 629
 630         /*
 631          * No NULL check here, we're shrinking by sizeof(void *), and
 632          * talloc_realloc just adjusts the size for this.
 633          */
 634         conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
 635                                        num_pending - 1);
 636         return;
 637 }
 638
 639 static int smbXcli_req_destructor(struct tevent_req *req)
 640 {
 641         struct smbXcli_req_state *state =
 642                 tevent_req_data(req,
 643                 struct smbXcli_req_state);
 644
 645         /*
 646          * Make sure we really remove it from
 647          * the pending array on destruction.
 648          */
 649         state->smb1.mid = 0;
 650         smbXcli_req_unset_pending(req);
 651         return 0;
 652 }
 653
 654 static bool smb1cli_req_cancel(struct tevent_req *req);
 655 static bool smb2cli_req_cancel(struct tevent_req *req);
 656
 657 static bool smbXcli_req_cancel(struct tevent_req *req)
 658 {
 659         struct smbXcli_req_state *state =
 660                 tevent_req_data(req,
 661                 struct smbXcli_req_state);
 662
 663         if (!smbXcli_conn_is_connected(state->conn)) {
 664                 return false;
 665         }
 666
 667         if (state->conn->protocol == PROTOCOL_NONE) {
 668                 return false;
 669         }
 670
 671         if (state->conn->protocol >= PROTOCOL_SMB2_02) {
 672                 return smb2cli_req_cancel(req);
 673         }
 674
 675         return smb1cli_req_cancel(req);
 676 }
 677
 678 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
 679
 680 bool smbXcli_req_set_pending(struct tevent_req *req)
 681 {
 682         struct smbXcli_req_state *state =
 683                 tevent_req_data(req,
 684                 struct smbXcli_req_state);
 685         struct smbXcli_conn *conn;
 686         struct tevent_req **pending;
 687         size_t num_pending;
 688
 689         conn = state->conn;
 690
 691         if (!smbXcli_conn_is_connected(conn)) {
 692                 return false;
 693         }
 694
 695         num_pending = talloc_array_length(conn->pending);
 696
 697         pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
 698                                  num_pending+1);
 699         if (pending == NULL) {
 700                 return false;
 701         }
 702         pending[num_pending] = req;
 703         conn->pending = pending;
 704         talloc_set_destructor(req, smbXcli_req_destructor);
 705         tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
 706
 707         if (!smbXcli_conn_receive_next(conn)) {
 708                 /*
 709                  * the caller should notify the current request
 710                  *
 711                  * And all other pending requests get notified
 712                  * by smbXcli_conn_disconnect().
 713                  */
 714                 smbXcli_req_unset_pending(req);
 715                 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
 716                 return false;
 717         }
 718
 719         return true;
 720 }
 721
 722 static void smbXcli_conn_received(struct tevent_req *subreq);
 723
 724 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
 725 {
 726         size_t num_pending = talloc_array_length(conn->pending);
 727         struct tevent_req *req;
 728         struct smbXcli_req_state *state;
 729
 730         if (conn->read_smb_req != NULL) {
 731                 return true;
 732         }
 733
 734         if (num_pending == 0) {
 735                 if (conn->smb2.mid < UINT64_MAX) {
 736                         /* no more pending requests, so we are done for now */
 737                         return true;
 738                 }
 739
 740                 /*
 741                  * If there are no more SMB2 requests possible,
 742                  * because we are out of message ids,
 743                  * we need to disconnect.
 744                  */
 745                 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
 746                 return true;
 747         }
 748
 749         req = conn->pending[0];
 750         state = tevent_req_data(req, struct smbXcli_req_state);
 751
 752         /*
 753          * We're the first ones, add the read_smb request that waits for the
 754          * answer from the server
 755          */
 756         conn->read_smb_req = read_smb_send(conn->pending,
 757                                            state->ev,
 758                                            conn->read_fd);
 759         if (conn->read_smb_req == NULL) {
 760                 return false;
 761         }
 762         tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
 763         return true;
 764 }
 765
 766 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
 767 {
 768         tevent_queue_stop(conn->outgoing);
 769
 770         if (conn->read_fd != -1) {
 771                 close(conn->read_fd);
 772         }
 773         if (conn->write_fd != -1) {
 774                 close(conn->write_fd);
 775         }
 776         conn->read_fd = -1;
 777         conn->write_fd = -1;
 778
 779         /*
 780          * Cancel all pending requests. We do not do a for-loop walking
 781          * conn->pending because that array changes in
 782          * smbXcli_req_unset_pending.
 783          */
 784         while (talloc_array_length(conn->pending) > 0) {
 785                 struct tevent_req *req;
 786                 struct smbXcli_req_state *state;
 787                 struct tevent_req **chain;
 788                 size_t num_chained;
 789                 size_t i;
 790
 791                 req = conn->pending[0];
 792                 state = tevent_req_data(req, struct smbXcli_req_state);
 793
 794                 if (state->smb1.chained_requests == NULL) {
 795                         /*
 796                          * We're dead. No point waiting for trans2
 797                          * replies.
 798                          */
 799                         state->smb1.mid = 0;
 800
 801                         smbXcli_req_unset_pending(req);
 802
 803                         if (NT_STATUS_IS_OK(status)) {
 804                                 /* do not notify the callers */
 805                                 continue;
 806                         }
 807
 808                         /*
 809                          * we need to defer the callback, because we may notify
 810                          * more then one caller.
 811                          */
 812                         tevent_req_defer_callback(req, state->ev);
 813                         tevent_req_nterror(req, status);
 814                         continue;
 815                 }
 816
 817                 chain = talloc_move(conn, &state->smb1.chained_requests);
 818                 num_chained = talloc_array_length(chain);
 819
 820                 for (i=0; i<num_chained; i++) {
 821                         req = chain[i];
 822                         state = tevent_req_data(req, struct smbXcli_req_state);
 823
 824                         /*
 825                          * We're dead. No point waiting for trans2
 826                          * replies.
 827                          */
 828                         state->smb1.mid = 0;
 829
 830                         smbXcli_req_unset_pending(req);
 831
 832                         if (NT_STATUS_IS_OK(status)) {
 833                                 /* do not notify the callers */
 834                                 continue;
 835                         }
 836
 837                         /*
 838                          * we need to defer the callback, because we may notify
 839                          * more than one caller.
 840                          */
 841                         tevent_req_defer_callback(req, state->ev);
 842                         tevent_req_nterror(req, status);
 843                 }
 844                 TALLOC_FREE(chain);
 845         }
 846 }
 847
 848 /*
 849  * Fetch a smb request's mid. Only valid after the request has been sent by
 850  * smb1cli_req_send().
 851  */
 852 uint16_t smb1cli_req_mid(struct tevent_req *req)
 853 {
 854         struct smbXcli_req_state *state =
 855                 tevent_req_data(req,
 856                 struct smbXcli_req_state);
 857
 858         if (state->smb1.mid != 0) {
 859                 return state->smb1.mid;
 860         }
 861
 862         return SVAL(state->smb1.hdr, HDR_MID);
 863 }
 864
 865 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
 866 {
 867         struct smbXcli_req_state *state =
 868                 tevent_req_data(req,
 869                 struct smbXcli_req_state);
 870
 871         state->smb1.mid = mid;
 872 }
 873
 874 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
 875 {
 876         struct smbXcli_req_state *state =
 877                 tevent_req_data(req,
 878                 struct smbXcli_req_state);
 879
 880         return state->smb1.seqnum;
 881 }
 882
 883 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
 884 {
 885         struct smbXcli_req_state *state =
 886                 tevent_req_data(req,
 887                 struct smbXcli_req_state);
 888
 889         state->smb1.seqnum = seqnum;
 890 }
 891
 892 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
 893 {
 894         size_t result = 0;
 895         int i;
 896         for (i=0; i<count; i++) {
 897                 result += iov[i].iov_len;
 898         }
 899         return result;
 900 }
 901
 902 static uint8_t *smbXcli_iov_concat(TALLOC_CTX *mem_ctx,
 903                                    const struct iovec *iov,
 904                                    int count)
 905 {
 906         size_t len = smbXcli_iov_len(iov, count);
 907         size_t copied;
 908         uint8_t *buf;
 909         int i;
 910
 911         buf = talloc_array(mem_ctx, uint8_t, len);
 912         if (buf == NULL) {
 913                 return NULL;
 914         }
 915         copied = 0;
 916         for (i=0; i<count; i++) {
 917                 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
 918                 copied += iov[i].iov_len;
 919         }
 920         return buf;
 921 }
 922
 923 static void smb1cli_req_flags(enum protocol_types protocol,
 924                               uint32_t smb1_capabilities,
 925                               uint8_t smb_command,
 926                               uint8_t additional_flags,
 927                               uint8_t clear_flags,
 928                               uint8_t *_flags,
 929                               uint16_t additional_flags2,
 930                               uint16_t clear_flags2,
 931                               uint16_t *_flags2)
 932 {
 933         uint8_t flags = 0;
 934         uint16_t flags2 = 0;
 935
 936         if (protocol >= PROTOCOL_LANMAN1) {
 937                 flags |= FLAG_CASELESS_PATHNAMES;
 938                 flags |= FLAG_CANONICAL_PATHNAMES;
 939         }
 940
 941         if (protocol >= PROTOCOL_LANMAN2) {
 942                 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
 943                 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
 944         }
 945
 946         if (protocol >= PROTOCOL_NT1) {
 947                 flags2 |= FLAGS2_IS_LONG_NAME;
 948
 949                 if (smb1_capabilities & CAP_UNICODE) {
 950                         flags2 |= FLAGS2_UNICODE_STRINGS;
 951                 }
 952                 if (smb1_capabilities & CAP_STATUS32) {
 953                         flags2 |= FLAGS2_32_BIT_ERROR_CODES;
 954                 }
 955                 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
 956                         flags2 |= FLAGS2_EXTENDED_SECURITY;
 957                 }
 958         }
 959
 960         flags |= additional_flags;
 961         flags &= ~clear_flags;
 962         flags2 |= additional_flags2;
 963         flags2 &= ~clear_flags2;
 964
 965         *_flags = flags;
 966         *_flags2 = flags2;
 967 }
 968
 969 static void smb1cli_req_cancel_done(struct tevent_req *subreq);
 970
 971 static bool smb1cli_req_cancel(struct tevent_req *req)
 972 {
 973         struct smbXcli_req_state *state =
 974                 tevent_req_data(req,
 975                 struct smbXcli_req_state);
 976         uint8_t flags;
 977         uint16_t flags2;
 978         uint32_t pid;
 979         uint16_t tid;
 980         uint16_t uid;
 981         uint16_t mid;
 982         struct tevent_req *subreq;
 983         NTSTATUS status;
 984
 985         flags = CVAL(state->smb1.hdr, HDR_FLG);
 986         flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
 987         pid  = SVAL(state->smb1.hdr, HDR_PID);
 988         pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
 989         tid = SVAL(state->smb1.hdr, HDR_TID);
 990         uid = SVAL(state->smb1.hdr, HDR_UID);
 991         mid = SVAL(state->smb1.hdr, HDR_MID);
 992
 993         subreq = smb1cli_req_create(state, state->ev,
 994                                     state->conn,
 995                                     SMBntcancel,
 996                                     flags, 0,
 997                                     flags2, 0,
 998                                     0, /* timeout */
 999                                     pid, tid, uid,
1000                                     0, NULL, /* vwv */
1001                                     0, NULL); /* bytes */
1002         if (subreq == NULL) {
1003                 return false;
1004         }
1005         smb1cli_req_set_mid(subreq, mid);
1006
1007         status = smb1cli_req_chain_submit(&subreq, 1);
1008         if (!NT_STATUS_IS_OK(status)) {
1009                 TALLOC_FREE(subreq);
1010                 return false;
1011         }
1012         smb1cli_req_set_mid(subreq, 0);
1013
1014         tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
1015
1016         return true;
1017 }
1018
1019 static void smb1cli_req_cancel_done(struct tevent_req *subreq)
1020 {
1021         /* we do not care about the result */
1022         TALLOC_FREE(subreq);
1023 }
1024
1025 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
1026                                       struct tevent_context *ev,
1027                                       struct smbXcli_conn *conn,
1028                                       uint8_t smb_command,
1029                                       uint8_t additional_flags,
1030                                       uint8_t clear_flags,
1031                                       uint16_t additional_flags2,
1032                                       uint16_t clear_flags2,
1033                                       uint32_t timeout_msec,
1034                                       uint32_t pid,
1035                                       uint16_t tid,
1036                                       uint16_t uid,
1037                                       uint8_t wct, uint16_t *vwv,
1038                                       int iov_count,
1039                                       struct iovec *bytes_iov)
1040 {
1041         struct tevent_req *req;
1042         struct smbXcli_req_state *state;
1043         uint8_t flags = 0;
1044         uint16_t flags2 = 0;
1045
1046         if (iov_count > MAX_SMB_IOV) {
1047                 /*
1048                  * Should not happen :-)
1049                  */
1050                 return NULL;
1051         }
1052
1053         req = tevent_req_create(mem_ctx, &state,
1054                                 struct smbXcli_req_state);
1055         if (req == NULL) {
1056                 return NULL;
1057         }
1058         state->ev = ev;
1059         state->conn = conn;
1060
1061         state->smb1.recv_cmd = 0xFF;
1062         state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
1063         state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
1064         if (state->smb1.recv_iov == NULL) {
1065                 TALLOC_FREE(req);
1066                 return NULL;
1067         }
1068
1069         smb1cli_req_flags(conn->protocol,
1070                           conn->smb1.capabilities,
1071                           smb_command,
1072                           additional_flags,
1073                           clear_flags,
1074                           &flags,
1075                           additional_flags2,
1076                           clear_flags2,
1077                           &flags2);
1078
1079         SIVAL(state->smb1.hdr, 0,           SMB_MAGIC);
1080         SCVAL(state->smb1.hdr, HDR_COM,     smb_command);
1081         SIVAL(state->smb1.hdr, HDR_RCLS,    NT_STATUS_V(NT_STATUS_OK));
1082         SCVAL(state->smb1.hdr, HDR_FLG,     flags);
1083         SSVAL(state->smb1.hdr, HDR_FLG2,    flags2);
1084         SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
1085         SSVAL(state->smb1.hdr, HDR_TID,     tid);
1086         SSVAL(state->smb1.hdr, HDR_PID,     pid);
1087         SSVAL(state->smb1.hdr, HDR_UID,     uid);
1088         SSVAL(state->smb1.hdr, HDR_MID,     0); /* this comes later */
1089         SCVAL(state->smb1.hdr, HDR_WCT,     wct);
1090
1091         state->smb1.vwv = vwv;
1092
1093         SSVAL(state->smb1.bytecount_buf, 0, smbXcli_iov_len(bytes_iov, iov_count));
1094
1095         state->smb1.iov[0].iov_base = (void *)state->length_hdr;
1096         state->smb1.iov[0].iov_len  = sizeof(state->length_hdr);
1097         state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
1098         state->smb1.iov[1].iov_len  = sizeof(state->smb1.hdr);
1099         state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
1100         state->smb1.iov[2].iov_len  = wct * sizeof(uint16_t);
1101         state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
1102         state->smb1.iov[3].iov_len  = sizeof(uint16_t);
1103
1104         if (iov_count != 0) {
1105                 memcpy(&state->smb1.iov[4], bytes_iov,
1106                        iov_count * sizeof(*bytes_iov));
1107         }
1108         state->smb1.iov_count = iov_count + 4;
1109
1110         if (timeout_msec > 0) {
1111                 struct timeval endtime;
1112
1113                 endtime = timeval_current_ofs_msec(timeout_msec);
1114                 if (!tevent_req_set_endtime(req, ev, endtime)) {
1115                         return req;
1116                 }
1117         }
1118
1119         switch (smb_command) {
1120         case SMBtranss:
1121         case SMBtranss2:
1122         case SMBnttranss:
1123                 state->one_way = true;
1124                 break;
1125         case SMBntcancel:
1126                 state->one_way = true;
1127                 state->smb1.one_way_seqnum = true;
1128                 break;
1129         case SMBlockingX:
1130                 if ((wct == 8) &&
1131                     (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
1132                         state->one_way = true;
1133                 }
1134                 break;
1135         }
1136
1137         return req;
1138 }
1139
1140 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
1141                                    struct iovec *iov, int iov_count,
1142                                    uint32_t *seqnum,
1143                                    bool one_way_seqnum)
1144 {
1145         TALLOC_CTX *frame = NULL;
1146         uint8_t *buf;
1147
1148         /*
1149          * Obvious optimization: Make cli_calculate_sign_mac work with struct
1150          * iovec directly. MD5Update would do that just fine.
1151          */
1152
1153         if (iov_count < 4) {
1154                 return NT_STATUS_INVALID_PARAMETER_MIX;
1155         }
1156         if (iov[0].iov_len != NBT_HDR_SIZE) {
1157                 return NT_STATUS_INVALID_PARAMETER_MIX;
1158         }
1159         if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1160                 return NT_STATUS_INVALID_PARAMETER_MIX;
1161         }
1162         if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1163                 return NT_STATUS_INVALID_PARAMETER_MIX;
1164         }
1165         if (iov[3].iov_len != sizeof(uint16_t)) {
1166                 return NT_STATUS_INVALID_PARAMETER_MIX;
1167         }
1168
1169         frame = talloc_stackframe();
1170
1171         buf = smbXcli_iov_concat(frame, iov, iov_count);
1172         if (buf == NULL) {
1173                 return NT_STATUS_NO_MEMORY;
1174         }
1175
1176         *seqnum = smb_signing_next_seqnum(conn->smb1.signing,
1177                                           one_way_seqnum);
1178         smb_signing_sign_pdu(conn->smb1.signing, buf, *seqnum);
1179         memcpy(iov[1].iov_base, buf+4, iov[1].iov_len);
1180
1181         TALLOC_FREE(frame);
1182         return NT_STATUS_OK;
1183 }
1184
1185 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1186 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1187                                                TALLOC_CTX *tmp_mem,
1188                                                uint8_t *inbuf);
1189
1190 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1191                                           struct smbXcli_req_state *state,
1192                                           struct iovec *iov, int iov_count)
1193 {
1194         struct tevent_req *subreq;
1195         NTSTATUS status;
1196         uint8_t cmd;
1197         uint16_t mid;
1198
1199         if (!smbXcli_conn_is_connected(state->conn)) {
1200                 return NT_STATUS_CONNECTION_DISCONNECTED;
1201         }
1202
1203         if (state->conn->protocol > PROTOCOL_NT1) {
1204                 return NT_STATUS_REVISION_MISMATCH;
1205         }
1206
1207         if (iov_count < 4) {
1208                 return NT_STATUS_INVALID_PARAMETER_MIX;
1209         }
1210         if (iov[0].iov_len != NBT_HDR_SIZE) {
1211                 return NT_STATUS_INVALID_PARAMETER_MIX;
1212         }
1213         if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1214                 return NT_STATUS_INVALID_PARAMETER_MIX;
1215         }
1216         if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1217                 return NT_STATUS_INVALID_PARAMETER_MIX;
1218         }
1219         if (iov[3].iov_len != sizeof(uint16_t)) {
1220                 return NT_STATUS_INVALID_PARAMETER_MIX;
1221         }
1222
1223         cmd = CVAL(iov[1].iov_base, HDR_COM);
1224         if (cmd == SMBreadBraw) {
1225                 if (smbXcli_conn_has_async_calls(state->conn)) {
1226                         return NT_STATUS_INVALID_PARAMETER_MIX;
1227                 }
1228                 state->conn->smb1.read_braw_req = req;
1229         }
1230
1231         if (state->smb1.mid != 0) {
1232                 mid = state->smb1.mid;
1233         } else {
1234                 mid = smb1cli_alloc_mid(state->conn);
1235         }
1236         SSVAL(iov[1].iov_base, HDR_MID, mid);
1237
1238         _smb_setlen_nbt(iov[0].iov_base, smbXcli_iov_len(&iov[1], iov_count-1));
1239
1240         status = smb1cli_conn_signv(state->conn, iov, iov_count,
1241                                     &state->smb1.seqnum,
1242                                     state->smb1.one_way_seqnum);
1243
1244         if (!NT_STATUS_IS_OK(status)) {
1245                 return status;
1246         }
1247
1248         /*
1249          * If we supported multiple encrytion contexts
1250          * here we'd look up based on tid.
1251          */
1252         if (common_encryption_on(state->conn->smb1.trans_enc)) {
1253                 char *buf, *enc_buf;
1254
1255                 buf = (char *)smbXcli_iov_concat(talloc_tos(), iov, iov_count);
1256                 if (buf == NULL) {
1257                         return NT_STATUS_NO_MEMORY;
1258                 }
1259                 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1260                                                (char *)buf, &enc_buf);
1261                 TALLOC_FREE(buf);
1262                 if (!NT_STATUS_IS_OK(status)) {
1263                         DEBUG(0, ("Error in encrypting client message: %s\n",
1264                                   nt_errstr(status)));
1265                         return status;
1266                 }
1267                 buf = (char *)talloc_memdup(state, enc_buf,
1268                                             smb_len_nbt(enc_buf)+4);
1269                 SAFE_FREE(enc_buf);
1270                 if (buf == NULL) {
1271                         return NT_STATUS_NO_MEMORY;
1272                 }
1273                 iov[0].iov_base = (void *)buf;
1274                 iov[0].iov_len = talloc_get_size(buf);
1275                 iov_count = 1;
1276         }
1277
1278         if (state->conn->dispatch_incoming == NULL) {
1279                 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1280         }
1281
1282         tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1283
1284         subreq = writev_send(state, state->ev, state->conn->outgoing,
1285                              state->conn->write_fd, false, iov, iov_count);
1286         if (subreq == NULL) {
1287                 return NT_STATUS_NO_MEMORY;
1288         }
1289         tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1290         return NT_STATUS_OK;
1291 }
1292
1293 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1294                                     struct tevent_context *ev,
1295                                     struct smbXcli_conn *conn,
1296                                     uint8_t smb_command,
1297                                     uint8_t additional_flags,
1298                                     uint8_t clear_flags,
1299                                     uint16_t additional_flags2,
1300                                     uint16_t clear_flags2,
1301                                     uint32_t timeout_msec,
1302                                     uint32_t pid,
1303                                     uint16_t tid,
1304                                     uint16_t uid,
1305                                     uint8_t wct, uint16_t *vwv,
1306                                     uint32_t num_bytes,
1307                                     const uint8_t *bytes)
1308 {
1309         struct tevent_req *req;
1310         struct iovec iov;
1311         NTSTATUS status;
1312
1313         iov.iov_base = discard_const_p(void, bytes);
1314         iov.iov_len = num_bytes;
1315
1316         req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1317                                  additional_flags, clear_flags,
1318                                  additional_flags2, clear_flags2,
1319                                  timeout_msec,
1320                                  pid, tid, uid,
1321                                  wct, vwv, 1, &iov);
1322         if (req == NULL) {
1323                 return NULL;
1324         }
1325         if (!tevent_req_is_in_progress(req)) {
1326                 return tevent_req_post(req, ev);
1327         }
1328         status = smb1cli_req_chain_submit(&req, 1);
1329         if (tevent_req_nterror(req, status)) {
1330                 return tevent_req_post(req, ev);
1331         }
1332         return req;
1333 }
1334
1335 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1336 {
1337         struct tevent_req *req =
1338                 tevent_req_callback_data(subreq,
1339                 struct tevent_req);
1340         struct smbXcli_req_state *state =
1341                 tevent_req_data(req,
1342                 struct smbXcli_req_state);
1343         ssize_t nwritten;
1344         int err;
1345
1346         nwritten = writev_recv(subreq, &err);
1347         TALLOC_FREE(subreq);
1348         if (nwritten == -1) {
1349                 NTSTATUS status = map_nt_error_from_unix_common(err);
1350                 smbXcli_conn_disconnect(state->conn, status);
1351                 return;
1352         }
1353
1354         if (state->one_way) {
1355                 state->inbuf = NULL;
1356                 tevent_req_done(req);
1357                 return;
1358         }
1359
1360         if (!smbXcli_req_set_pending(req)) {
1361                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1362                 return;
1363         }
1364 }
1365
1366 static void smbXcli_conn_received(struct tevent_req *subreq)
1367 {
1368         struct smbXcli_conn *conn =
1369                 tevent_req_callback_data(subreq,
1370                 struct smbXcli_conn);
1371         TALLOC_CTX *frame = talloc_stackframe();
1372         NTSTATUS status;
1373         uint8_t *inbuf;
1374         ssize_t received;
1375         int err;
1376
1377         if (subreq != conn->read_smb_req) {
1378                 DEBUG(1, ("Internal error: cli_smb_received called with "
1379                           "unexpected subreq\n"));
1380                 status = NT_STATUS_INTERNAL_ERROR;
1381                 smbXcli_conn_disconnect(conn, status);
1382                 TALLOC_FREE(frame);
1383                 return;
1384         }
1385         conn->read_smb_req = NULL;
1386
1387         received = read_smb_recv(subreq, frame, &inbuf, &err);
1388         TALLOC_FREE(subreq);
1389         if (received == -1) {
1390                 status = map_nt_error_from_unix_common(err);
1391                 smbXcli_conn_disconnect(conn, status);
1392                 TALLOC_FREE(frame);
1393                 return;
1394         }
1395
1396         status = conn->dispatch_incoming(conn, frame, inbuf);
1397         TALLOC_FREE(frame);
1398         if (NT_STATUS_IS_OK(status)) {
1399                 /*
1400                  * We should not do any more processing
1401                  * as the dispatch function called
1402                  * tevent_req_done().
1403                  */
1404                 return;
1405         } else if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1406                 /*
1407                  * We got an error, so notify all pending requests
1408                  */
1409                 smbXcli_conn_disconnect(conn, status);
1410                 return;
1411         }
1412
1413         /*
1414          * We got NT_STATUS_RETRY, so we may ask for a
1415          * next incoming pdu.
1416          */
1417         if (!smbXcli_conn_receive_next(conn)) {
1418                 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1419         }
1420 }
1421
1422 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1423                                           struct iovec **piov, int *pnum_iov)
1424 {
1425         struct iovec *iov;
1426         int num_iov;
1427         size_t buflen;
1428         size_t taken;
1429         size_t remaining;
1430         uint8_t *hdr;
1431         uint8_t cmd;
1432         uint32_t wct_ofs;
1433
1434         buflen = smb_len_nbt(buf);
1435         taken = 0;
1436
1437         hdr = buf + NBT_HDR_SIZE;
1438
1439         if (buflen < MIN_SMB_SIZE) {
1440                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1441         }
1442
1443         /*
1444          * This returns iovec elements in the following order:
1445          *
1446          * - SMB header
1447          *
1448          * - Parameter Block
1449          * - Data Block
1450          *
1451          * - Parameter Block
1452          * - Data Block
1453          *
1454          * - Parameter Block
1455          * - Data Block
1456          */
1457         num_iov = 1;
1458
1459         iov = talloc_array(mem_ctx, struct iovec, num_iov);
1460         if (iov == NULL) {
1461                 return NT_STATUS_NO_MEMORY;
1462         }
1463         iov[0].iov_base = hdr;
1464         iov[0].iov_len = HDR_WCT;
1465         taken += HDR_WCT;
1466
1467         cmd = CVAL(hdr, HDR_COM);
1468         wct_ofs = HDR_WCT;
1469
1470         while (true) {
1471                 size_t len = buflen - taken;
1472                 struct iovec *cur;
1473                 struct iovec *iov_tmp;
1474                 uint8_t wct;
1475                 uint32_t bcc_ofs;
1476                 uint16_t bcc;
1477                 size_t needed;
1478
1479                 /*
1480                  * we need at least WCT and BCC
1481                  */
1482                 needed = sizeof(uint8_t) + sizeof(uint16_t);
1483                 if (len < needed) {
1484                         DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1485                                    __location__, (int)len, (int)needed));
1486                         goto inval;
1487                 }
1488
1489                 /*
1490                  * Now we check if the specified words are there
1491                  */
1492                 wct = CVAL(hdr, wct_ofs);
1493                 needed += wct * sizeof(uint16_t);
1494                 if (len < needed) {
1495                         DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1496                                    __location__, (int)len, (int)needed));
1497                         goto inval;
1498                 }
1499
1500                 /*
1501                  * Now we check if the specified bytes are there
1502                  */
1503                 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
1504                 bcc = SVAL(hdr, bcc_ofs);
1505                 needed += bcc * sizeof(uint8_t);
1506                 if (len < needed) {
1507                         DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1508                                    __location__, (int)len, (int)needed));
1509                         goto inval;
1510                 }
1511
1512                 /*
1513                  * we allocate 2 iovec structures for words and bytes
1514                  */
1515                 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1516                                          num_iov + 2);
1517                 if (iov_tmp == NULL) {
1518                         TALLOC_FREE(iov);
1519                         return NT_STATUS_NO_MEMORY;
1520                 }
1521                 iov = iov_tmp;
1522                 cur = &iov[num_iov];
1523                 num_iov += 2;
1524
1525                 cur[0].iov_len = wct * sizeof(uint16_t);
1526                 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1527                 cur[1].iov_len = bcc * sizeof(uint8_t);
1528                 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
1529
1530                 taken += needed;
1531
1532                 if (!smb1cli_is_andx_req(cmd)) {
1533                         /*
1534                          * If the current command does not have AndX chanining
1535                          * we are done.
1536                          */
1537                         break;
1538                 }
1539
1540                 if (wct == 0 && bcc == 0) {
1541                         /*
1542                          * An empty response also ends the chain,
1543                          * most likely with an error.
1544                          */
1545                         break;
1546                 }
1547
1548                 if (wct < 2) {
1549                         DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
1550                                    __location__, (int)wct, (int)cmd));
1551                         goto inval;
1552                 }
1553                 cmd = CVAL(cur[0].iov_base, 0);
1554                 if (cmd == 0xFF) {
1555                         /*
1556                          * If it is the end of the chain we are also done.
1557                          */
1558                         break;
1559                 }
1560                 wct_ofs = SVAL(cur[0].iov_base, 2);
1561
1562                 if (wct_ofs < taken) {
1563                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
1564                 }
1565                 if (wct_ofs > buflen) {
1566                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
1567                 }
1568
1569                 /*
1570                  * we consumed everything up to the start of the next
1571                  * parameter block.
1572                  */
1573                 taken = wct_ofs;
1574         }
1575
1576         remaining = buflen - taken;
1577
1578         if (remaining > 0 && num_iov >= 3) {
1579                 /*
1580                  * The last DATA block gets the remaining
1581                  * bytes, this is needed to support
1582                  * CAP_LARGE_WRITEX and CAP_LARGE_READX.
1583                  */
1584                 iov[num_iov-1].iov_len += remaining;
1585         }
1586
1587         *piov = iov;
1588         *pnum_iov = num_iov;
1589         return NT_STATUS_OK;
1590
1591 inval:
1592         TALLOC_FREE(iov);
1593         return NT_STATUS_INVALID_NETWORK_RESPONSE;
1594 }
1595
1596 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1597                                                TALLOC_CTX *tmp_mem,
1598                                                uint8_t *inbuf)
1599 {
1600         struct tevent_req *req;
1601         struct smbXcli_req_state *state;
1602         NTSTATUS status;
1603         size_t num_pending;
1604         size_t i;
1605         uint8_t cmd;
1606         uint16_t mid;
1607         bool oplock_break;
1608         const uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
1609         struct iovec *iov = NULL;
1610         int num_iov = 0;
1611         struct tevent_req **chain = NULL;
1612         size_t num_chained = 0;
1613         size_t num_responses = 0;
1614
1615         if (conn->smb1.read_braw_req != NULL) {
1616                 req = conn->smb1.read_braw_req;
1617                 conn->smb1.read_braw_req = NULL;
1618                 state = tevent_req_data(req, struct smbXcli_req_state);
1619
1620                 smbXcli_req_unset_pending(req);
1621
1622                 if (state->smb1.recv_iov == NULL) {
1623                         /*
1624                          * For requests with more than
1625                          * one response, we have to readd the
1626                          * recv_iov array.
1627                          */
1628                         state->smb1.recv_iov = talloc_zero_array(state,
1629                                                                  struct iovec,
1630                                                                  3);
1631                         if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1632                                 return NT_STATUS_OK;
1633                         }
1634                 }
1635
1636                 state->smb1.recv_iov[0].iov_base = (void *)(inbuf + NBT_HDR_SIZE);
1637                 state->smb1.recv_iov[0].iov_len = smb_len_nbt(inbuf);
1638                 ZERO_STRUCT(state->smb1.recv_iov[1]);
1639                 ZERO_STRUCT(state->smb1.recv_iov[2]);
1640
1641                 state->smb1.recv_cmd = SMBreadBraw;
1642                 state->smb1.recv_status = NT_STATUS_OK;
1643                 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
1644
1645                 tevent_req_done(req);
1646                 return NT_STATUS_OK;
1647         }
1648
1649         if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
1650             && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
1651                 DEBUG(10, ("Got non-SMB PDU\n"));
1652                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1653         }
1654
1655         /*
1656          * If we supported multiple encrytion contexts
1657          * here we'd look up based on tid.
1658          */
1659         if (common_encryption_on(conn->smb1.trans_enc)
1660             && (CVAL(inbuf, 0) == 0)) {
1661                 uint16_t enc_ctx_num;
1662
1663                 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
1664                 if (!NT_STATUS_IS_OK(status)) {
1665                         DEBUG(10, ("get_enc_ctx_num returned %s\n",
1666                                    nt_errstr(status)));
1667                         return status;
1668                 }
1669
1670                 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
1671                         DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
1672                                    enc_ctx_num,
1673                                    conn->smb1.trans_enc->enc_ctx_num));
1674                         return NT_STATUS_INVALID_HANDLE;
1675                 }
1676
1677                 status = common_decrypt_buffer(conn->smb1.trans_enc,
1678                                                (char *)inbuf);
1679                 if (!NT_STATUS_IS_OK(status)) {
1680                         DEBUG(10, ("common_decrypt_buffer returned %s\n",
1681                                    nt_errstr(status)));
1682                         return status;
1683                 }
1684         }
1685
1686         mid = SVAL(inhdr, HDR_MID);
1687         num_pending = talloc_array_length(conn->pending);
1688
1689         for (i=0; i<num_pending; i++) {
1690                 if (mid == smb1cli_req_mid(conn->pending[i])) {
1691                         break;
1692                 }
1693         }
1694         if (i == num_pending) {
1695                 /* Dump unexpected reply */
1696                 return NT_STATUS_RETRY;
1697         }
1698
1699         oplock_break = false;
1700
1701         if (mid == 0xffff) {
1702                 /*
1703                  * Paranoia checks that this is really an oplock break request.
1704                  */
1705                 oplock_break = (smb_len_nbt(inbuf) == 51); /* hdr + 8 words */
1706                 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
1707                 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
1708                 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
1709                 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
1710
1711                 if (!oplock_break) {
1712                         /* Dump unexpected reply */
1713                         return NT_STATUS_RETRY;
1714                 }
1715         }
1716
1717         req = conn->pending[i];
1718         state = tevent_req_data(req, struct smbXcli_req_state);
1719
1720         if (!oplock_break /* oplock breaks are not signed */
1721             && !smb_signing_check_pdu(conn->smb1.signing,
1722                                       inbuf, state->smb1.seqnum+1)) {
1723                 DEBUG(10, ("cli_check_sign_mac failed\n"));
1724                 return NT_STATUS_ACCESS_DENIED;
1725         }
1726
1727         status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
1728                                            &iov, &num_iov);
1729         if (!NT_STATUS_IS_OK(status)) {
1730                 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
1731                           nt_errstr(status)));
1732                 return status;
1733         }
1734
1735         cmd = CVAL(inhdr, HDR_COM);
1736         status = smb1cli_pull_raw_error(inhdr);
1737
1738         if (state->smb1.chained_requests == NULL) {
1739                 if (num_iov != 3) {
1740                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
1741                 }
1742
1743                 smbXcli_req_unset_pending(req);
1744
1745                 if (state->smb1.recv_iov == NULL) {
1746                         /*
1747                          * For requests with more than
1748                          * one response, we have to readd the
1749                          * recv_iov array.
1750                          */
1751                         state->smb1.recv_iov = talloc_zero_array(state,
1752                                                                  struct iovec,
1753                                                                  3);
1754                         if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1755                                 return NT_STATUS_OK;
1756                         }
1757                 }
1758
1759                 state->smb1.recv_cmd = cmd;
1760                 state->smb1.recv_status = status;
1761                 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
1762
1763                 state->smb1.recv_iov[0] = iov[0];
1764                 state->smb1.recv_iov[1] = iov[1];
1765                 state->smb1.recv_iov[2] = iov[2];
1766
1767                 if (talloc_array_length(conn->pending) == 0) {
1768                         tevent_req_done(req);
1769                         return NT_STATUS_OK;
1770                 }
1771
1772                 tevent_req_defer_callback(req, state->ev);
1773                 tevent_req_done(req);
1774                 return NT_STATUS_RETRY;
1775         }
1776
1777         chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
1778         num_chained = talloc_array_length(chain);
1779         num_responses = (num_iov - 1)/2;
1780
1781         if (num_responses > num_chained) {
1782                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1783         }
1784
1785         for (i=0; i<num_chained; i++) {
1786                 size_t iov_idx = 1 + (i*2);
1787                 struct iovec *cur = &iov[iov_idx];
1788                 uint8_t *inbuf_ref;
1789
1790                 req = chain[i];
1791                 state = tevent_req_data(req, struct smbXcli_req_state);
1792
1793                 smbXcli_req_unset_pending(req);
1794
1795                 /*
1796                  * as we finish multiple requests here
1797                  * we need to defer the callbacks as
1798                  * they could destroy our current stack state.
1799                  */
1800                 tevent_req_defer_callback(req, state->ev);
1801
1802                 if (i >= num_responses) {
1803                         tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
1804                         continue;
1805                 }
1806
1807                 if (state->smb1.recv_iov == NULL) {
1808                         /*
1809                          * For requests with more than
1810                          * one response, we have to readd the
1811                          * recv_iov array.
1812                          */
1813                         state->smb1.recv_iov = talloc_zero_array(state,
1814                                                                  struct iovec,
1815                                                                  3);
1816                         if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1817                                 continue;
1818                         }
1819                 }
1820
1821                 state->smb1.recv_cmd = cmd;
1822
1823                 if (i == (num_responses - 1)) {
1824                         /*
1825                          * The last request in the chain gets the status
1826                          */
1827                         state->smb1.recv_status = status;
1828                 } else {
1829                         cmd = CVAL(cur[0].iov_base, 0);
1830                         state->smb1.recv_status = NT_STATUS_OK;
1831                 }
1832
1833                 state->inbuf = inbuf;
1834
1835                 /*
1836                  * Note: here we use talloc_reference() in a way
1837                  *       that does not expose it to the caller.
1838                  */
1839                 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
1840                 if (tevent_req_nomem(inbuf_ref, req)) {
1841                         continue;
1842                 }
1843
1844                 /* copy the related buffers */
1845                 state->smb1.recv_iov[0] = iov[0];
1846                 state->smb1.recv_iov[1] = cur[0];
1847                 state->smb1.recv_iov[2] = cur[1];
1848
1849                 tevent_req_done(req);
1850         }
1851
1852         return NT_STATUS_RETRY;
1853 }
1854
1855 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
1856                           TALLOC_CTX *mem_ctx,
1857                           struct iovec **piov,
1858                           uint8_t **phdr,
1859                           uint8_t *pwct,
1860                           uint16_t **pvwv,
1861                           uint32_t *pvwv_offset,
1862                           uint32_t *pnum_bytes,
1863                           uint8_t **pbytes,
1864                           uint32_t *pbytes_offset,
1865                           uint8_t **pinbuf,
1866                           const struct smb1cli_req_expected_response *expected,
1867                           size_t num_expected)
1868 {
1869         struct smbXcli_req_state *state =
1870                 tevent_req_data(req,
1871                 struct smbXcli_req_state);
1872         NTSTATUS status = NT_STATUS_OK;
1873         struct iovec *recv_iov = NULL;
1874         uint8_t *hdr = NULL;
1875         uint8_t wct = 0;
1876         uint32_t vwv_offset = 0;
1877         uint16_t *vwv = NULL;
1878         uint32_t num_bytes = 0;
1879         uint32_t bytes_offset = 0;
1880         uint8_t *bytes = NULL;
1881         size_t i;
1882         bool found_status = false;
1883         bool found_size = false;
1884
1885         if (piov != NULL) {
1886                 *piov = NULL;
1887         }
1888         if (phdr != NULL) {
1889                 *phdr = 0;
1890         }
1891         if (pwct != NULL) {
1892                 *pwct = 0;
1893         }
1894         if (pvwv != NULL) {
1895                 *pvwv = NULL;
1896         }
1897         if (pvwv_offset != NULL) {
1898                 *pvwv_offset = 0;
1899         }
1900         if (pnum_bytes != NULL) {
1901                 *pnum_bytes = 0;
1902         }
1903         if (pbytes != NULL) {
1904                 *pbytes = NULL;
1905         }
1906         if (pbytes_offset != NULL) {
1907                 *pbytes_offset = 0;
1908         }
1909         if (pinbuf != NULL) {
1910                 *pinbuf = NULL;
1911         }
1912
1913         if (state->inbuf != NULL) {
1914                 recv_iov = state->smb1.recv_iov;
1915                 state->smb1.recv_iov = NULL;
1916                 if (state->smb1.recv_cmd != SMBreadBraw) {
1917                         hdr = (uint8_t *)recv_iov[0].iov_base;
1918                         wct = recv_iov[1].iov_len/2;
1919                         vwv = (uint16_t *)recv_iov[1].iov_base;
1920                         vwv_offset = PTR_DIFF(vwv, hdr);
1921                         num_bytes = recv_iov[2].iov_len;
1922                         bytes = (uint8_t *)recv_iov[2].iov_base;
1923                         bytes_offset = PTR_DIFF(bytes, hdr);
1924                 }
1925         }
1926
1927         if (tevent_req_is_nterror(req, &status)) {
1928                 for (i=0; i < num_expected; i++) {
1929                         if (NT_STATUS_EQUAL(status, expected[i].status)) {
1930                                 found_status = true;
1931                                 break;
1932                         }
1933                 }
1934
1935                 if (found_status) {
1936                         return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
1937                 }
1938
1939                 return status;
1940         }
1941
1942         if (num_expected == 0) {
1943                 found_status = true;
1944                 found_size = true;
1945         }
1946
1947         status = state->smb1.recv_status;
1948
1949         for (i=0; i < num_expected; i++) {
1950                 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
1951                         continue;
1952                 }
1953
1954                 found_status = true;
1955                 if (expected[i].wct == 0) {
1956                         found_size = true;
1957                         break;
1958                 }
1959
1960                 if (expected[i].wct == wct) {
1961                         found_size = true;
1962                         break;
1963                 }
1964         }
1965
1966         if (!found_status) {
1967                 return status;
1968         }
1969
1970         if (!found_size) {
1971                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1972         }
1973
1974         if (piov != NULL) {
1975                 *piov = talloc_move(mem_ctx, &recv_iov);
1976         }
1977
1978         if (phdr != NULL) {
1979                 *phdr = hdr;
1980         }
1981         if (pwct != NULL) {
1982                 *pwct = wct;
1983         }
1984         if (pvwv != NULL) {
1985                 *pvwv = vwv;
1986         }
1987         if (pvwv_offset != NULL) {
1988                 *pvwv_offset = vwv_offset;
1989         }
1990         if (pnum_bytes != NULL) {
1991                 *pnum_bytes = num_bytes;
1992         }
1993         if (pbytes != NULL) {
1994                 *pbytes = bytes;
1995         }
1996         if (pbytes_offset != NULL) {
1997                 *pbytes_offset = bytes_offset;
1998         }
1999         if (pinbuf != NULL) {
2000                 *pinbuf = state->inbuf;
2001         }
2002
2003         return status;
2004 }
2005
2006 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2007 {
2008         size_t wct_ofs;
2009         int i;
2010
2011         wct_ofs = HDR_WCT;
2012
2013         for (i=0; i<num_reqs; i++) {
2014                 struct smbXcli_req_state *state;
2015                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2016                 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2017                                            state->smb1.iov_count-2);
2018                 wct_ofs = (wct_ofs + 3) & ~3;
2019         }
2020         return wct_ofs;
2021 }
2022
2023 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2024 {
2025         struct smbXcli_req_state *first_state =
2026                 tevent_req_data(reqs[0],
2027                 struct smbXcli_req_state);
2028         struct smbXcli_req_state *state;
2029         size_t wct_offset;
2030         size_t chain_padding = 0;
2031         int i, iovlen;
2032         struct iovec *iov = NULL;
2033         struct iovec *this_iov;
2034         NTSTATUS status;
2035         size_t nbt_len;
2036
2037         if (num_reqs == 1) {
2038                 return smb1cli_req_writev_submit(reqs[0], first_state,
2039                                                  first_state->smb1.iov,
2040                                                  first_state->smb1.iov_count);
2041         }
2042
2043         iovlen = 0;
2044         for (i=0; i<num_reqs; i++) {
2045                 if (!tevent_req_is_in_progress(reqs[i])) {
2046                         return NT_STATUS_INTERNAL_ERROR;
2047                 }
2048
2049                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2050
2051                 if (state->smb1.iov_count < 4) {
2052                         return NT_STATUS_INVALID_PARAMETER_MIX;
2053                 }
2054
2055                 if (i == 0) {
2056                         /*
2057                          * The NBT and SMB header
2058                          */
2059                         iovlen += 2;
2060                 } else {
2061                         /*
2062                          * Chain padding
2063                          */
2064                         iovlen += 1;
2065                 }
2066
2067                 /*
2068                  * words and bytes
2069                  */
2070                 iovlen += state->smb1.iov_count - 2;
2071         }
2072
2073         iov = talloc_zero_array(first_state, struct iovec, iovlen);
2074         if (iov == NULL) {
2075                 return NT_STATUS_NO_MEMORY;
2076         }
2077
2078         first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2079                 first_state, reqs, sizeof(*reqs) * num_reqs);
2080         if (first_state->smb1.chained_requests == NULL) {
2081                 TALLOC_FREE(iov);
2082                 return NT_STATUS_NO_MEMORY;
2083         }
2084
2085         wct_offset = HDR_WCT;
2086         this_iov = iov;
2087
2088         for (i=0; i<num_reqs; i++) {
2089                 size_t next_padding = 0;
2090                 uint16_t *vwv;
2091
2092                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2093
2094                 if (i < num_reqs-1) {
2095                         if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2096                             || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2097                                 TALLOC_FREE(iov);
2098                                 TALLOC_FREE(first_state->smb1.chained_requests);
2099                                 return NT_STATUS_INVALID_PARAMETER_MIX;
2100                         }
2101                 }
2102
2103                 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2104                                               state->smb1.iov_count-2) + 1;
2105                 if ((wct_offset % 4) != 0) {
2106                         next_padding = 4 - (wct_offset % 4);
2107                 }
2108                 wct_offset += next_padding;
2109                 vwv = state->smb1.vwv;
2110
2111                 if (i < num_reqs-1) {
2112                         struct smbXcli_req_state *next_state =
2113                                 tevent_req_data(reqs[i+1],
2114                                 struct smbXcli_req_state);
2115                         SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2116                         SCVAL(vwv+0, 1, 0);
2117                         SSVAL(vwv+1, 0, wct_offset);
2118                 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2119                         /* properly end the chain */
2120                         SCVAL(vwv+0, 0, 0xff);
2121                         SCVAL(vwv+0, 1, 0xff);
2122                         SSVAL(vwv+1, 0, 0);
2123                 }
2124
2125                 if (i == 0) {
2126                         /*
2127                          * The NBT and SMB header
2128                          */
2129                         this_iov[0] = state->smb1.iov[0];
2130                         this_iov[1] = state->smb1.iov[1];
2131                         this_iov += 2;
2132                 } else {
2133                         /*
2134                          * This one is a bit subtle. We have to add
2135                          * chain_padding bytes between the requests, and we
2136                          * have to also include the wct field of the
2137                          * subsequent requests. We use the subsequent header
2138                          * for the padding, it contains the wct field in its
2139                          * last byte.
2140                          */
2141                         this_iov[0].iov_len = chain_padding+1;
2142                         this_iov[0].iov_base = (void *)&state->smb1.hdr[
2143                                 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2144                         memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2145                         this_iov += 1;
2146                 }
2147
2148                 /*
2149                  * copy the words and bytes
2150                  */
2151                 memcpy(this_iov, state->smb1.iov+2,
2152                        sizeof(struct iovec) * (state->smb1.iov_count-2));
2153                 this_iov += state->smb1.iov_count - 2;
2154                 chain_padding = next_padding;
2155         }
2156
2157         nbt_len = smbXcli_iov_len(&iov[1], iovlen-1);
2158         if (nbt_len > first_state->conn->smb1.max_xmit) {
2159                 TALLOC_FREE(iov);
2160                 TALLOC_FREE(first_state->smb1.chained_requests);
2161                 return NT_STATUS_INVALID_PARAMETER_MIX;
2162         }
2163
2164         status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2165         if (!NT_STATUS_IS_OK(status)) {
2166                 TALLOC_FREE(iov);
2167                 TALLOC_FREE(first_state->smb1.chained_requests);
2168                 return status;
2169         }
2170
2171         return NT_STATUS_OK;
2172 }
2173
2174 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2175 {
2176         return ((tevent_queue_length(conn->outgoing) != 0)
2177                 || (talloc_array_length(conn->pending) != 0));
2178 }
2179
2180 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2181 {
2182         return conn->smb2.server.capabilities;
2183 }
2184
2185 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2186 {
2187         return conn->smb2.server.security_mode;
2188 }
2189
2190 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2191 {
2192         return conn->smb2.server.max_trans_size;
2193 }
2194
2195 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2196 {
2197         return conn->smb2.server.max_read_size;
2198 }
2199
2200 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2201 {
2202         return conn->smb2.server.max_write_size;
2203 }
2204
2205 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2206                                   uint16_t max_credits)
2207 {
2208         conn->smb2.max_credits = max_credits;
2209 }
2210
2211 static void smb2cli_req_cancel_done(struct tevent_req *subreq);
2212
2213 static bool smb2cli_req_cancel(struct tevent_req *req)
2214 {
2215         struct smbXcli_req_state *state =
2216                 tevent_req_data(req,
2217                 struct smbXcli_req_state);
2218         uint32_t flags = IVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
2219         uint32_t pid = IVAL(state->smb2.hdr, SMB2_HDR_PID);
2220         uint32_t tid = IVAL(state->smb2.hdr, SMB2_HDR_TID);
2221         uint64_t mid = BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID);
2222         uint64_t aid = BVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID);
2223         struct smbXcli_session *session = state->session;
2224         uint8_t *fixed = state->smb2.pad;
2225         uint16_t fixed_len = 4;
2226         struct tevent_req *subreq;
2227         struct smbXcli_req_state *substate;
2228         NTSTATUS status;
2229
2230         SSVAL(fixed, 0, 0x04);
2231         SSVAL(fixed, 2, 0);
2232
2233         subreq = smb2cli_req_create(state, state->ev,
2234                                     state->conn,
2235                                     SMB2_OP_CANCEL,
2236                                     flags, 0,
2237                                     0, /* timeout */
2238                                     pid, tid, session,
2239                                     fixed, fixed_len,
2240                                     NULL, 0);
2241         if (subreq == NULL) {
2242                 return false;
2243         }
2244         substate = tevent_req_data(subreq, struct smbXcli_req_state);
2245
2246         if (flags & SMB2_HDR_FLAG_ASYNC) {
2247                 mid = 0;
2248         }
2249
2250         SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, flags);
2251         SIVAL(substate->smb2.hdr, SMB2_HDR_PID, pid);
2252         SIVAL(substate->smb2.hdr, SMB2_HDR_TID, tid);
2253         SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2254         SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, aid);
2255
2256         status = smb2cli_req_compound_submit(&subreq, 1);
2257         if (!NT_STATUS_IS_OK(status)) {
2258                 TALLOC_FREE(subreq);
2259                 return false;
2260         }
2261
2262         tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
2263
2264         return true;
2265 }
2266
2267 static void smb2cli_req_cancel_done(struct tevent_req *subreq)
2268 {
2269         /* we do not care about the result */
2270         TALLOC_FREE(subreq);
2271 }
2272
2273 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
2274                                       struct tevent_context *ev,
2275                                       struct smbXcli_conn *conn,
2276                                       uint16_t cmd,
2277                                       uint32_t additional_flags,
2278                                       uint32_t clear_flags,
2279                                       uint32_t timeout_msec,
2280                                       uint32_t pid,
2281                                       uint32_t tid,
2282                                       struct smbXcli_session *session,
2283                                       const uint8_t *fixed,
2284                                       uint16_t fixed_len,
2285                                       const uint8_t *dyn,
2286                                       uint32_t dyn_len)
2287 {
2288         struct tevent_req *req;
2289         struct smbXcli_req_state *state;
2290         uint32_t flags = 0;
2291         uint64_t uid = 0;
2292
2293         req = tevent_req_create(mem_ctx, &state,
2294                                 struct smbXcli_req_state);
2295         if (req == NULL) {
2296                 return NULL;
2297         }
2298
2299         state->ev = ev;
2300         state->conn = conn;
2301         state->session = session;
2302
2303         if (session) {
2304                 uid = session->smb2.session_id;
2305         }
2306
2307         state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
2308         if (state->smb2.recv_iov == NULL) {
2309                 TALLOC_FREE(req);
2310                 return NULL;
2311         }
2312
2313         flags |= additional_flags;
2314         flags &= ~clear_flags;
2315
2316         state->smb2.fixed = fixed;
2317         state->smb2.fixed_len = fixed_len;
2318         state->smb2.dyn = dyn;
2319         state->smb2.dyn_len = dyn_len;
2320
2321         SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID,    SMB2_MAGIC);
2322         SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH,         SMB2_HDR_BODY);
2323         SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE,         cmd);
2324         SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS,          flags);
2325         SIVAL(state->smb2.hdr, SMB2_HDR_PID,            pid);
2326         SIVAL(state->smb2.hdr, SMB2_HDR_TID,            tid);
2327         SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID,     uid);
2328
2329         switch (cmd) {
2330         case SMB2_OP_CANCEL:
2331                 state->one_way = true;
2332                 break;
2333         case SMB2_OP_BREAK:
2334                 /*
2335                  * If this is a dummy request, it will have
2336                  * UINT64_MAX as message id.
2337                  * If we send on break acknowledgement,
2338                  * this gets overwritten later.
2339                  */
2340                 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
2341                 break;
2342         }
2343
2344         if (timeout_msec > 0) {
2345                 struct timeval endtime;
2346
2347                 endtime = timeval_current_ofs_msec(timeout_msec);
2348                 if (!tevent_req_set_endtime(req, ev, endtime)) {
2349                         return req;
2350                 }
2351         }
2352
2353         return req;
2354 }
2355
2356 void smb2cli_req_set_notify_async(struct tevent_req *req)
2357 {
2358         struct smbXcli_req_state *state =
2359                 tevent_req_data(req,
2360                 struct smbXcli_req_state);
2361
2362         state->smb2.notify_async = true;
2363 }
2364
2365 static void smb2cli_req_writev_done(struct tevent_req *subreq);
2366 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2367                                                TALLOC_CTX *tmp_mem,
2368                                                uint8_t *inbuf);
2369
2370 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
2371                                      int num_reqs)
2372 {
2373         struct smbXcli_req_state *state;
2374         struct tevent_req *subreq;
2375         struct iovec *iov;
2376         int i, num_iov, nbt_len;
2377
2378         /*
2379          * 1 for the nbt length
2380          * per request: HDR, fixed, dyn, padding
2381          * -1 because the last one does not need padding
2382          */
2383
2384         iov = talloc_array(reqs[0], struct iovec, 1 + 4*num_reqs - 1);
2385         if (iov == NULL) {
2386                 return NT_STATUS_NO_MEMORY;
2387         }
2388
2389         num_iov = 1;
2390         nbt_len = 0;
2391
2392         for (i=0; i<num_reqs; i++) {
2393                 int hdr_iov;
2394                 size_t reqlen;
2395                 bool ret;
2396                 uint16_t opcode;
2397                 uint64_t avail;
2398                 uint16_t charge;
2399                 uint16_t credits;
2400                 uint64_t mid;
2401                 bool should_sign = false;
2402
2403                 if (!tevent_req_is_in_progress(reqs[i])) {
2404                         return NT_STATUS_INTERNAL_ERROR;
2405                 }
2406
2407                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2408
2409                 if (!smbXcli_conn_is_connected(state->conn)) {
2410                         return NT_STATUS_CONNECTION_DISCONNECTED;
2411                 }
2412
2413                 if ((state->conn->protocol != PROTOCOL_NONE) &&
2414                     (state->conn->protocol < PROTOCOL_SMB2_02)) {
2415                         return NT_STATUS_REVISION_MISMATCH;
2416                 }
2417
2418                 opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
2419                 if (opcode == SMB2_OP_CANCEL) {
2420                         goto skip_credits;
2421                 }
2422
2423                 avail = UINT64_MAX - state->conn->smb2.mid;
2424                 if (avail < 1) {
2425                         return NT_STATUS_CONNECTION_ABORTED;
2426                 }
2427
2428                 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2429                         charge = (MAX(state->smb2.dyn_len, 1) - 1)/ 65536 + 1;
2430                 } else {
2431                         charge = 1;
2432                 }
2433
2434                 charge = MAX(state->smb2.credit_charge, charge);
2435
2436                 avail = MIN(avail, state->conn->smb2.cur_credits);
2437                 if (avail < charge) {
2438                         return NT_STATUS_INTERNAL_ERROR;
2439                 }
2440
2441                 credits = 0;
2442                 if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
2443                         credits = state->conn->smb2.max_credits -
2444                                   state->conn->smb2.cur_credits;
2445                 }
2446                 if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
2447                         credits += 1;
2448                 }
2449
2450                 mid = state->conn->smb2.mid;
2451                 state->conn->smb2.mid += charge;
2452                 state->conn->smb2.cur_credits -= charge;
2453
2454                 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2455                         SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
2456                 }
2457                 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
2458                 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2459
2460 skip_credits:
2461                 hdr_iov = num_iov;
2462                 iov[num_iov].iov_base = state->smb2.hdr;
2463                 iov[num_iov].iov_len  = sizeof(state->smb2.hdr);
2464                 num_iov += 1;
2465
2466                 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
2467                 iov[num_iov].iov_len  = state->smb2.fixed_len;
2468                 num_iov += 1;
2469
2470                 if (state->smb2.dyn != NULL) {
2471                         iov[num_iov].iov_base = discard_const(state->smb2.dyn);
2472                         iov[num_iov].iov_len  = state->smb2.dyn_len;
2473                         num_iov += 1;
2474                 }
2475
2476                 reqlen  = sizeof(state->smb2.hdr);
2477                 reqlen += state->smb2.fixed_len;
2478                 reqlen += state->smb2.dyn_len;
2479
2480                 if (i < num_reqs-1) {
2481                         if ((reqlen % 8) > 0) {
2482                                 uint8_t pad = 8 - (reqlen % 8);
2483                                 iov[num_iov].iov_base = state->smb2.pad;
2484                                 iov[num_iov].iov_len = pad;
2485                                 num_iov += 1;
2486                                 reqlen += pad;
2487                         }
2488                         SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
2489                 }
2490                 nbt_len += reqlen;
2491
2492                 if (state->session) {
2493                         should_sign = state->session->smb2.should_sign;
2494                         if (state->session->smb2.channel_setup) {
2495                                 should_sign = true;
2496                         }
2497                 }
2498
2499                 if (should_sign) {
2500                         NTSTATUS status;
2501
2502                         status = smb2_signing_sign_pdu(state->session->smb2.signing_key,
2503                                                        &iov[hdr_iov], num_iov - hdr_iov);
2504                         if (!NT_STATUS_IS_OK(status)) {
2505                                 return status;
2506                         }
2507                 }
2508
2509                 ret = smbXcli_req_set_pending(reqs[i]);
2510                 if (!ret) {
2511                         return NT_STATUS_NO_MEMORY;
2512                 }
2513         }
2514
2515         state = tevent_req_data(reqs[0], struct smbXcli_req_state);
2516         _smb_setlen_tcp(state->length_hdr, nbt_len);
2517         iov[0].iov_base = state->length_hdr;
2518         iov[0].iov_len  = sizeof(state->length_hdr);
2519
2520         if (state->conn->dispatch_incoming == NULL) {
2521                 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
2522         }
2523
2524         subreq = writev_send(state, state->ev, state->conn->outgoing,
2525                              state->conn->write_fd, false, iov, num_iov);
2526         if (subreq == NULL) {
2527                 return NT_STATUS_NO_MEMORY;
2528         }
2529         tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
2530         return NT_STATUS_OK;
2531 }
2532
2533 void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
2534 {
2535         struct smbXcli_req_state *state =
2536                 tevent_req_data(req,
2537                 struct smbXcli_req_state);
2538
2539         state->smb2.credit_charge = charge;
2540 }
2541
2542 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
2543                                     struct tevent_context *ev,
2544                                     struct smbXcli_conn *conn,
2545                                     uint16_t cmd,
2546                                     uint32_t additional_flags,
2547                                     uint32_t clear_flags,
2548                                     uint32_t timeout_msec,
2549                                     uint32_t pid,
2550                                     uint32_t tid,
2551                                     struct smbXcli_session *session,
2552                                     const uint8_t *fixed,
2553                                     uint16_t fixed_len,
2554                                     const uint8_t *dyn,
2555                                     uint32_t dyn_len)
2556 {
2557         struct tevent_req *req;
2558         NTSTATUS status;
2559
2560         req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
2561                                  additional_flags, clear_flags,
2562                                  timeout_msec,
2563                                  pid, tid, session,
2564                                  fixed, fixed_len, dyn, dyn_len);
2565         if (req == NULL) {
2566                 return NULL;
2567         }
2568         if (!tevent_req_is_in_progress(req)) {
2569                 return tevent_req_post(req, ev);
2570         }
2571         status = smb2cli_req_compound_submit(&req, 1);
2572         if (tevent_req_nterror(req, status)) {
2573                 return tevent_req_post(req, ev);
2574         }
2575         return req;
2576 }
2577
2578 static void smb2cli_req_writev_done(struct tevent_req *subreq)
2579 {
2580         struct tevent_req *req =
2581                 tevent_req_callback_data(subreq,
2582                 struct tevent_req);
2583         struct smbXcli_req_state *state =
2584                 tevent_req_data(req,
2585                 struct smbXcli_req_state);
2586         ssize_t nwritten;
2587         int err;
2588
2589         nwritten = writev_recv(subreq, &err);
2590         TALLOC_FREE(subreq);
2591         if (nwritten == -1) {
2592                 /* here, we need to notify all pending requests */
2593                 NTSTATUS status = map_nt_error_from_unix_common(err);
2594                 smbXcli_conn_disconnect(state->conn, status);
2595                 return;
2596         }
2597 }
2598
2599 static NTSTATUS smb2cli_inbuf_parse_compound(uint8_t *buf, TALLOC_CTX *mem_ctx,
2600                                              struct iovec **piov, int *pnum_iov)
2601 {
2602         struct iovec *iov;
2603         int num_iov;
2604         size_t buflen;
2605         size_t taken;
2606         uint8_t *first_hdr;
2607
2608         num_iov = 0;
2609
2610         iov = talloc_array(mem_ctx, struct iovec, num_iov);
2611         if (iov == NULL) {
2612                 return NT_STATUS_NO_MEMORY;
2613         }
2614
2615         buflen = smb_len_tcp(buf);
2616         taken = 0;
2617         first_hdr = buf + NBT_HDR_SIZE;
2618
2619         while (taken < buflen) {
2620                 size_t len = buflen - taken;
2621                 uint8_t *hdr = first_hdr + taken;
2622                 struct iovec *cur;
2623                 size_t full_size;
2624                 size_t next_command_ofs;
2625                 uint16_t body_size;
2626                 struct iovec *iov_tmp;
2627
2628                 /*
2629                  * We need the header plus the body length field
2630                  */
2631
2632                 if (len < SMB2_HDR_BODY + 2) {
2633                         DEBUG(10, ("%d bytes left, expected at least %d\n",
2634                                    (int)len, SMB2_HDR_BODY));
2635                         goto inval;
2636                 }
2637                 if (IVAL(hdr, 0) != SMB2_MAGIC) {
2638                         DEBUG(10, ("Got non-SMB2 PDU: %x\n",
2639                                    IVAL(hdr, 0)));
2640                         goto inval;
2641                 }
2642                 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
2643                         DEBUG(10, ("Got HDR len %d, expected %d\n",
2644                                    SVAL(hdr, 4), SMB2_HDR_BODY));
2645                         goto inval;
2646                 }
2647
2648                 full_size = len;
2649                 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
2650                 body_size = SVAL(hdr, SMB2_HDR_BODY);
2651
2652                 if (next_command_ofs != 0) {
2653                         if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
2654                                 goto inval;
2655                         }
2656                         if (next_command_ofs > full_size) {
2657                                 goto inval;
2658                         }
2659                         full_size = next_command_ofs;
2660                 }
2661                 if (body_size < 2) {
2662                         goto inval;
2663                 }
2664                 body_size &= 0xfffe;
2665
2666                 if (body_size > (full_size - SMB2_HDR_BODY)) {
2667                         goto inval;
2668                 }
2669
2670                 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
2671                                          num_iov + 3);
2672                 if (iov_tmp == NULL) {
2673                         TALLOC_FREE(iov);
2674                         return NT_STATUS_NO_MEMORY;
2675                 }
2676                 iov = iov_tmp;
2677                 cur = &iov[num_iov];
2678                 num_iov += 3;
2679
2680                 cur[0].iov_base = hdr;
2681                 cur[0].iov_len  = SMB2_HDR_BODY;
2682                 cur[1].iov_base = hdr + SMB2_HDR_BODY;
2683                 cur[1].iov_len  = body_size;
2684                 cur[2].iov_base = hdr + SMB2_HDR_BODY + body_size;
2685                 cur[2].iov_len  = full_size - (SMB2_HDR_BODY + body_size);
2686
2687                 taken += full_size;
2688         }
2689
2690         *piov = iov;
2691         *pnum_iov = num_iov;
2692         return NT_STATUS_OK;
2693
2694 inval:
2695         TALLOC_FREE(iov);
2696         return NT_STATUS_INVALID_NETWORK_RESPONSE;
2697 }
2698
2699 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
2700                                                     uint64_t mid)
2701 {
2702         size_t num_pending = talloc_array_length(conn->pending);
2703         size_t i;
2704
2705         for (i=0; i<num_pending; i++) {
2706                 struct tevent_req *req = conn->pending[i];
2707                 struct smbXcli_req_state *state =
2708                         tevent_req_data(req,
2709                         struct smbXcli_req_state);
2710
2711                 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
2712                         return req;
2713                 }
2714         }
2715         return NULL;
2716 }
2717
2718 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2719                                                TALLOC_CTX *tmp_mem,
2720                                                uint8_t *inbuf)
2721 {
2722         struct tevent_req *req;
2723         struct smbXcli_req_state *state = NULL;
2724         struct iovec *iov;
2725         int i, num_iov;
2726         NTSTATUS status;
2727         bool defer = true;
2728         struct smbXcli_session *last_session = NULL;
2729
2730         status = smb2cli_inbuf_parse_compound(inbuf, tmp_mem,
2731                                               &iov, &num_iov);
2732         if (!NT_STATUS_IS_OK(status)) {
2733                 return status;
2734         }
2735
2736         for (i=0; i<num_iov; i+=3) {
2737                 uint8_t *inbuf_ref = NULL;
2738                 struct iovec *cur = &iov[i];
2739                 uint8_t *inhdr = (uint8_t *)cur[0].iov_base;
2740                 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
2741                 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
2742                 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
2743                 uint16_t req_opcode;
2744                 uint32_t req_flags;
2745                 uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
2746                 uint32_t new_credits;
2747                 struct smbXcli_session *session = NULL;
2748                 const DATA_BLOB *signing_key = NULL;
2749                 bool should_sign = false;
2750
2751                 new_credits = conn->smb2.cur_credits;
2752                 new_credits += credits;
2753                 if (new_credits > UINT16_MAX) {
2754                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
2755                 }
2756                 conn->smb2.cur_credits += credits;
2757
2758                 req = smb2cli_conn_find_pending(conn, mid);
2759                 if (req == NULL) {
2760                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
2761                 }
2762                 state = tevent_req_data(req, struct smbXcli_req_state);
2763
2764                 state->smb2.got_async = false;
2765
2766                 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
2767                 if (opcode != req_opcode) {
2768                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
2769                 }
2770                 req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
2771
2772                 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
2773                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
2774                 }
2775
2776                 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
2777                 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
2778                     NT_STATUS_EQUAL(status, STATUS_PENDING)) {
2779                         uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
2780
2781                         /*
2782                          * async interim responses are not signed,
2783                          * even if the SMB2_HDR_FLAG_SIGNED flag
2784                          * is set.
2785                          */
2786                         req_flags |= SMB2_HDR_FLAG_ASYNC;
2787                         SBVAL(state->smb2.hdr, SMB2_HDR_FLAGS, req_flags);
2788                         SBVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID, async_id);
2789
2790                         if (state->smb2.notify_async) {
2791                                 state->smb2.got_async = true;
2792                                 tevent_req_defer_callback(req, state->ev);
2793                                 tevent_req_notify_callback(req);
2794                         }
2795                         continue;
2796                 }
2797
2798                 session = state->session;
2799                 if (req_flags & SMB2_HDR_FLAG_CHAINED) {
2800                         session = last_session;
2801                 }
2802                 last_session = session;
2803
2804                 if (session) {
2805                         should_sign = session->smb2.should_sign;
2806                         if (session->smb2.channel_setup) {
2807                                 should_sign = true;
2808                         }
2809                 }
2810
2811                 if (should_sign) {
2812                         if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
2813                                 return NT_STATUS_ACCESS_DENIED;
2814                         }
2815                 }
2816
2817                 if (flags & SMB2_HDR_FLAG_SIGNED) {
2818                         uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
2819
2820                         if (session == NULL) {
2821                                 struct smbXcli_session *s;
2822
2823                                 s = state->conn->sessions;
2824                                 for (; s; s = s->next) {
2825                                         if (s->smb2.session_id != uid) {
2826                                                 continue;
2827                                         }
2828
2829                                         session = s;
2830                                         break;
2831                                 }
2832                         }
2833
2834                         if (session == NULL) {
2835                                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2836                         }
2837
2838                         last_session = session;
2839                         signing_key = &session->smb2.signing_key;
2840                 }
2841
2842                 if ((opcode == SMB2_OP_SESSSETUP) &&
2843                      NT_STATUS_IS_OK(status)) {
2844                         /*
2845                          * the caller has to check the signing
2846                          * as only the caller knows the correct
2847                          * session key
2848                          */
2849                         signing_key = NULL;
2850                 }
2851
2852                 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
2853                         /*
2854                          * if the server returns NT_STATUS_USER_SESSION_DELETED
2855                          * the response is not signed and we should
2856                          * propagate the NT_STATUS_USER_SESSION_DELETED
2857                          * status to the caller.
2858                          */
2859                         if (signing_key) {
2860                                 signing_key = NULL;
2861                         }
2862                 }
2863
2864                 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
2865                     NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
2866                     NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
2867                         /*
2868                          * if the server returns
2869                          * NT_STATUS_NETWORK_NAME_DELETED
2870                          * NT_STATUS_FILE_CLOSED
2871                          * NT_STATUS_INVALID_PARAMETER
2872                          * the response might not be signed
2873                          * as this happens before the signing checks.
2874                          *
2875                          * If server echos the signature (or all zeros)
2876                          * we should report the status from the server
2877                          * to the caller.
2878                          */
2879                         if (signing_key) {
2880                                 int cmp;
2881
2882                                 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
2883                                              state->smb2.hdr+SMB2_HDR_SIGNATURE,
2884                                              16);
2885                                 if (cmp == 0) {
2886                                         state->smb2.signing_skipped = true;
2887                                         signing_key = NULL;
2888                                 }
2889                         }
2890                         if (signing_key) {
2891                                 int cmp;
2892                                 static const uint8_t zeros[16];
2893
2894                                 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
2895                                              zeros,
2896                                              16);
2897                                 if (cmp == 0) {
2898                                         state->smb2.signing_skipped = true;
2899                                         signing_key = NULL;
2900                                 }
2901                         }
2902                 }
2903
2904                 if (signing_key) {
2905                         status = smb2_signing_check_pdu(*signing_key, cur, 3);
2906                         if (!NT_STATUS_IS_OK(status)) {
2907                                 /*
2908                                  * If the signing check fails, we disconnect
2909                                  * the connection.
2910                                  */
2911                                 return status;
2912                         }
2913                 }
2914
2915                 smbXcli_req_unset_pending(req);
2916
2917                 /*
2918                  * There might be more than one response
2919                  * we need to defer the notifications
2920                  */
2921                 if ((num_iov == 4) && (talloc_array_length(conn->pending) == 0)) {
2922                         defer = false;
2923                 }
2924
2925                 if (defer) {
2926                         tevent_req_defer_callback(req, state->ev);
2927                 }
2928
2929                 /*
2930                  * Note: here we use talloc_reference() in a way
2931                  *       that does not expose it to the caller.
2932                  */
2933                 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
2934                 if (tevent_req_nomem(inbuf_ref, req)) {
2935                         continue;
2936                 }
2937
2938                 /* copy the related buffers */
2939                 state->smb2.recv_iov[0] = cur[0];
2940                 state->smb2.recv_iov[1] = cur[1];
2941                 state->smb2.recv_iov[2] = cur[2];
2942
2943                 tevent_req_done(req);
2944         }
2945
2946         if (defer) {
2947                 return NT_STATUS_RETRY;
2948         }
2949
2950         return NT_STATUS_OK;
2951 }
2952
2953 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
2954                           struct iovec **piov,
2955                           const struct smb2cli_req_expected_response *expected,
2956                           size_t num_expected)
2957 {
2958         struct smbXcli_req_state *state =
2959                 tevent_req_data(req,
2960                 struct smbXcli_req_state);
2961         NTSTATUS status;
2962         size_t body_size;
2963         bool found_status = false;
2964         bool found_size = false;
2965         size_t i;
2966
2967         if (piov != NULL) {
2968                 *piov = NULL;
2969         }
2970
2971         if (state->smb2.got_async) {
2972                 return STATUS_PENDING;
2973         }
2974
2975         if (tevent_req_is_nterror(req, &status)) {
2976                 for (i=0; i < num_expected; i++) {
2977                         if (NT_STATUS_EQUAL(status, expected[i].status)) {
2978                                 found_status = true;
2979                                 break;
2980                         }
2981                 }
2982
2983                 if (found_status) {
2984                         return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2985                 }
2986
2987                 return status;
2988         }
2989
2990         if (num_expected == 0) {
2991                 found_status = true;
2992                 found_size = true;
2993         }
2994
2995         status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
2996         body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
2997
2998         for (i=0; i < num_expected; i++) {
2999                 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
3000                         continue;
3001                 }
3002
3003                 found_status = true;
3004                 if (expected[i].body_size == 0) {
3005                         found_size = true;
3006                         break;
3007                 }
3008
3009                 if (expected[i].body_size == body_size) {
3010                         found_size = true;
3011                         break;
3012                 }
3013         }
3014
3015         if (!found_status) {
3016                 return status;
3017         }
3018
3019         if (state->smb2.signing_skipped) {
3020                 if (num_expected > 0) {
3021                         return NT_STATUS_ACCESS_DENIED;
3022                 }
3023                 if (!NT_STATUS_IS_ERR(status)) {
3024                         return NT_STATUS_ACCESS_DENIED;
3025                 }
3026         }
3027
3028         if (!found_size) {
3029                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3030         }
3031
3032         if (piov != NULL) {
3033                 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
3034         }
3035
3036         return status;
3037 }
3038
3039 static const struct {
3040         enum protocol_types proto;
3041         const char *smb1_name;
3042 } smb1cli_prots[] = {
3043         {PROTOCOL_CORE,         "PC NETWORK PROGRAM 1.0"},
3044         {PROTOCOL_COREPLUS,     "MICROSOFT NETWORKS 1.03"},
3045         {PROTOCOL_LANMAN1,      "MICROSOFT NETWORKS 3.0"},
3046         {PROTOCOL_LANMAN1,      "LANMAN1.0"},
3047         {PROTOCOL_LANMAN2,      "LM1.2X002"},
3048         {PROTOCOL_LANMAN2,      "DOS LANMAN2.1"},
3049         {PROTOCOL_LANMAN2,      "LANMAN2.1"},
3050         {PROTOCOL_LANMAN2,      "Samba"},
3051         {PROTOCOL_NT1,          "NT LANMAN 1.0"},
3052         {PROTOCOL_NT1,          "NT LM 0.12"},
3053         {PROTOCOL_SMB2_02,      "SMB 2.002"},
3054         {PROTOCOL_SMB2_10,      "SMB 2.???"},
3055 };
3056
3057 static const struct {
3058         enum protocol_types proto;
3059         uint16_t smb2_dialect;
3060 } smb2cli_prots[] = {
3061         {PROTOCOL_SMB2_02,      SMB2_DIALECT_REVISION_202},
3062         {PROTOCOL_SMB2_10,      SMB2_DIALECT_REVISION_210},
3063         {PROTOCOL_SMB2_22,      SMB2_DIALECT_REVISION_222},
3064 };
3065
3066 struct smbXcli_negprot_state {
3067         struct smbXcli_conn *conn;
3068         struct tevent_context *ev;
3069         uint32_t timeout_msec;
3070         enum protocol_types min_protocol;
3071         enum protocol_types max_protocol;
3072
3073         struct {
3074                 uint8_t fixed[36];
3075                 uint8_t dyn[ARRAY_SIZE(smb2cli_prots)*2];
3076         } smb2;
3077 };
3078
3079 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
3080 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
3081 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
3082 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
3083 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
3084 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
3085                                                   TALLOC_CTX *frame,
3086                                                   uint8_t *inbuf);
3087
3088 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
3089                                         struct tevent_context *ev,
3090                                         struct smbXcli_conn *conn,
3091                                         uint32_t timeout_msec,
3092                                         enum protocol_types min_protocol,
3093                                         enum protocol_types max_protocol)
3094 {
3095         struct tevent_req *req, *subreq;
3096         struct smbXcli_negprot_state *state;
3097
3098         req = tevent_req_create(mem_ctx, &state,
3099                                 struct smbXcli_negprot_state);
3100         if (req == NULL) {
3101                 return NULL;
3102         }
3103         state->conn = conn;
3104         state->ev = ev;
3105         state->timeout_msec = timeout_msec;
3106         state->min_protocol = min_protocol;
3107         state->max_protocol = max_protocol;
3108
3109         if (min_protocol == PROTOCOL_NONE) {
3110                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3111                 return tevent_req_post(req, ev);
3112         }
3113
3114         if (max_protocol == PROTOCOL_NONE) {
3115                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3116                 return tevent_req_post(req, ev);
3117         }
3118
3119         if (min_protocol > max_protocol) {
3120                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3121                 return tevent_req_post(req, ev);
3122         }
3123
3124         if ((min_protocol < PROTOCOL_SMB2_02) &&
3125             (max_protocol < PROTOCOL_SMB2_02)) {
3126                 /*
3127                  * SMB1 only...
3128                  */
3129                 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
3130
3131                 subreq = smbXcli_negprot_smb1_subreq(state);
3132                 if (tevent_req_nomem(subreq, req)) {
3133                         return tevent_req_post(req, ev);
3134                 }
3135                 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
3136                 return req;
3137         }
3138
3139         if ((min_protocol >= PROTOCOL_SMB2_02) &&
3140             (max_protocol >= PROTOCOL_SMB2_02)) {
3141                 /*
3142                  * SMB2 only...
3143                  */
3144                 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3145
3146                 subreq = smbXcli_negprot_smb2_subreq(state);
3147                 if (tevent_req_nomem(subreq, req)) {
3148                         return tevent_req_post(req, ev);
3149                 }
3150                 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
3151                 return req;
3152         }
3153
3154         /*
3155          * We send an SMB1 negprot with the SMB2 dialects
3156          * and expect a SMB1 or a SMB2 response.
3157          *
3158          * smbXcli_negprot_dispatch_incoming() will fix the
3159          * callback to match protocol of the response.
3160          */
3161         conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
3162
3163         subreq = smbXcli_negprot_smb1_subreq(state);
3164         if (tevent_req_nomem(subreq, req)) {
3165                 return tevent_req_post(req, ev);
3166         }
3167         tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
3168         return req;
3169 }
3170
3171 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
3172 {
3173         struct tevent_req *req =
3174                 tevent_req_callback_data(subreq,
3175                 struct tevent_req);
3176         NTSTATUS status;
3177
3178         /*
3179          * we just want the low level error
3180          */
3181         status = tevent_req_simple_recv_ntstatus(subreq);
3182         TALLOC_FREE(subreq);
3183         if (tevent_req_nterror(req, status)) {
3184                 return;
3185         }
3186
3187         /* this should never happen */
3188         tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
3189 }
3190
3191 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
3192 {
3193         size_t i;
3194         DATA_BLOB bytes = data_blob_null;
3195         uint8_t flags;
3196         uint16_t flags2;
3197
3198         /* setup the protocol strings */
3199         for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3200                 uint8_t c = 2;
3201                 bool ok;
3202
3203                 if (smb1cli_prots[i].proto < state->min_protocol) {
3204                         continue;
3205                 }
3206
3207                 if (smb1cli_prots[i].proto > state->max_protocol) {
3208                         continue;
3209                 }
3210
3211                 ok = data_blob_append(state, &bytes, &c, sizeof(c));
3212                 if (!ok) {
3213                         return NULL;
3214                 }
3215
3216                 /*
3217                  * We now it is already ascii and
3218                  * we want NULL termination.
3219                  */
3220                 ok = data_blob_append(state, &bytes,
3221                                       smb1cli_prots[i].smb1_name,
3222                                       strlen(smb1cli_prots[i].smb1_name)+1);
3223                 if (!ok) {
3224                         return NULL;
3225                 }
3226         }
3227
3228         smb1cli_req_flags(state->max_protocol,
3229                           state->conn->smb1.client.capabilities,
3230                           SMBnegprot,
3231                           0, 0, &flags,
3232                           0, 0, &flags2);
3233
3234         return smb1cli_req_send(state, state->ev, state->conn,
3235                                 SMBnegprot,
3236                                 flags, ~flags,
3237                                 flags2, ~flags2,
3238                                 state->timeout_msec,
3239                                 0xFFFE, 0, 0, /* pid, tid, uid */
3240                                 0, NULL, /* wct, vwv */
3241                                 bytes.length, bytes.data);
3242 }
3243
3244 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
3245 {
3246         struct tevent_req *req =
3247                 tevent_req_callback_data(subreq,
3248                 struct tevent_req);
3249         struct smbXcli_negprot_state *state =
3250                 tevent_req_data(req,
3251                 struct smbXcli_negprot_state);
3252         struct smbXcli_conn *conn = state->conn;
3253         struct iovec *recv_iov = NULL;
3254         uint8_t *inhdr;
3255         uint8_t wct;
3256         uint16_t *vwv;
3257         uint32_t num_bytes;
3258         uint8_t *bytes;
3259         NTSTATUS status;
3260         uint16_t protnum;
3261         size_t i;
3262         size_t num_prots = 0;
3263         uint8_t flags;
3264         uint32_t client_capabilities = conn->smb1.client.capabilities;
3265         uint32_t both_capabilities;
3266         uint32_t server_capabilities = 0;
3267         uint32_t capabilities;
3268         uint32_t client_max_xmit = conn->smb1.client.max_xmit;
3269         uint32_t server_max_xmit = 0;
3270         uint32_t max_xmit;
3271         uint32_t server_max_mux = 0;
3272         uint16_t server_security_mode = 0;
3273         uint32_t server_session_key = 0;
3274         bool server_readbraw = false;
3275         bool server_writebraw = false;
3276         bool server_lockread = false;
3277         bool server_writeunlock = false;
3278         struct GUID server_guid = GUID_zero();
3279         DATA_BLOB server_gss_blob = data_blob_null;
3280         uint8_t server_challenge[8];
3281         char *server_workgroup = NULL;
3282         char *server_name = NULL;
3283         int server_time_zone = 0;
3284         NTTIME server_system_time = 0;
3285         static const struct smb1cli_req_expected_response expected[] = {
3286         {
3287                 .status = NT_STATUS_OK,
3288                 .wct = 0x11, /* NT1 */
3289         },
3290         {
3291                 .status = NT_STATUS_OK,
3292                 .wct = 0x0D, /* LM */
3293         },
3294         {
3295                 .status = NT_STATUS_OK,
3296                 .wct = 0x01, /* CORE */
3297         }
3298         };
3299
3300         ZERO_STRUCT(server_challenge);
3301
3302         status = smb1cli_req_recv(subreq, state,
3303                                   &recv_iov,
3304                                   &inhdr,
3305                                   &wct,
3306                                   &vwv,
3307                                   NULL, /* pvwv_offset */
3308                                   &num_bytes,
3309                                   &bytes,
3310                                   NULL, /* pbytes_offset */
3311                                   NULL, /* pinbuf */
3312                                   expected, ARRAY_SIZE(expected));
3313         TALLOC_FREE(subreq);
3314         if (tevent_req_nterror(req, status)) {
3315                 return;
3316         }
3317
3318         flags = CVAL(inhdr, HDR_FLG);
3319
3320         protnum = SVAL(vwv, 0);
3321
3322         for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3323                 if (smb1cli_prots[i].proto < state->min_protocol) {
3324                         continue;
3325                 }
3326
3327                 if (smb1cli_prots[i].proto > state->max_protocol) {
3328                         continue;
3329                 }
3330
3331                 if (protnum != num_prots) {
3332                         num_prots++;
3333                         continue;
3334                 }
3335
3336                 conn->protocol = smb1cli_prots[i].proto;
3337                 break;
3338         }
3339
3340         if (conn->protocol == PROTOCOL_NONE) {
3341                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3342                 return;
3343         }
3344
3345         if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
3346                 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
3347                          "and the selected protocol level doesn't support it.\n"));
3348                 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
3349                 return;
3350         }
3351
3352         if (flags & FLAG_SUPPORT_LOCKREAD) {
3353                 server_lockread = true;
3354                 server_writeunlock = true;
3355         }
3356
3357         if (conn->protocol >= PROTOCOL_NT1) {
3358                 const char *client_signing = NULL;
3359                 bool server_mandatory = false;
3360                 bool server_allowed = false;
3361                 const char *server_signing = NULL;
3362                 bool ok;
3363                 uint8_t key_len;
3364
3365                 if (wct != 0x11) {
3366                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3367                         return;
3368                 }
3369
3370                 /* NT protocol */
3371                 server_security_mode = CVAL(vwv + 1, 0);
3372                 server_max_mux = SVAL(vwv + 1, 1);
3373                 server_max_xmit = IVAL(vwv + 3, 1);
3374                 server_session_key = IVAL(vwv + 7, 1);
3375                 server_time_zone = SVALS(vwv + 15, 1);
3376                 server_time_zone *= 60;
3377                 /* this time arrives in real GMT */
3378                 server_system_time = BVAL(vwv + 11, 1);
3379                 server_capabilities = IVAL(vwv + 9, 1);
3380
3381                 key_len = CVAL(vwv + 16, 1);
3382
3383                 if (server_capabilities & CAP_RAW_MODE) {
3384                         server_readbraw = true;
3385                         server_writebraw = true;
3386                 }
3387                 if (server_capabilities & CAP_LOCK_AND_READ) {
3388                         server_lockread = true;
3389                 }
3390
3391                 if (server_capabilities & CAP_EXTENDED_SECURITY) {
3392                         DATA_BLOB blob1, blob2;
3393
3394                         if (num_bytes < 16) {
3395                                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3396                                 return;
3397                         }
3398
3399                         blob1 = data_blob_const(bytes, 16);
3400                         status = GUID_from_data_blob(&blob1, &server_guid);
3401                         if (tevent_req_nterror(req, status)) {
3402                                 return;
3403                         }
3404
3405                         blob1 = data_blob_const(bytes+16, num_bytes-16);
3406                         blob2 = data_blob_dup_talloc(state, blob1);
3407                         if (blob1.length > 0 &&
3408                             tevent_req_nomem(blob2.data, req)) {
3409                                 return;
3410                         }
3411                         server_gss_blob = blob2;
3412                 } else {
3413                         DATA_BLOB blob1, blob2;
3414
3415                         if (num_bytes < key_len) {
3416                                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3417                                 return;
3418                         }
3419
3420                         if (key_len != 0 && key_len != 8) {
3421                                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3422                                 return;
3423                         }
3424
3425                         if (key_len == 8) {
3426                                 memcpy(server_challenge, bytes, 8);
3427                         }
3428
3429                         blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
3430                         blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
3431                         if (blob1.length > 0) {
3432                                 size_t len;
3433
3434                                 len = utf16_len_n(blob1.data,
3435                                                   blob1.length);
3436                                 blob1.length = len;
3437
3438                                 ok = convert_string_talloc(state,
3439                                                            CH_UTF16LE,
3440                                                            CH_UNIX,
3441                                                            blob1.data,
3442                                                            blob1.length,
3443                                                            &server_workgroup,
3444                                                            &len);
3445                                 if (!ok) {
3446                                         status = map_nt_error_from_unix_common(errno);
3447                                         tevent_req_nterror(req, status);
3448                                         return;
3449                                 }
3450                         }
3451
3452                         blob2.data += blob1.length;
3453                         blob2.length -= blob1.length;
3454                         if (blob2.length > 0) {
3455                                 size_t len;
3456
3457                                 len = utf16_len_n(blob1.data,
3458                                                   blob1.length);
3459                                 blob1.length = len;
3460
3461                                 ok = convert_string_talloc(state,
3462                                                            CH_UTF16LE,
3463                                                            CH_UNIX,
3464                                                            blob2.data,
3465                                                            blob2.length,
3466                                                            &server_name,
3467                                                            &len);
3468                                 if (!ok) {
3469                                         status = map_nt_error_from_unix_common(errno);
3470                                         tevent_req_nterror(req, status);
3471                                         return;
3472                                 }
3473                         }
3474                 }
3475
3476                 client_signing = "disabled";
3477                 if (conn->allow_signing) {
3478                         client_signing = "allowed";
3479                 }
3480                 if (conn->mandatory_signing) {
3481                         client_signing = "required";
3482                 }
3483
3484                 server_signing = "not supported";
3485                 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
3486                         server_signing = "supported";
3487                         server_allowed = true;
3488                 }
3489                 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
3490                         server_signing = "required";
3491                         server_mandatory = true;
3492                 }
3493
3494                 ok = smb_signing_set_negotiated(conn->smb1.signing,
3495                                                 server_allowed,
3496                                                 server_mandatory);
3497                 if (!ok) {
3498                         DEBUG(1,("cli_negprot: SMB signing is required, "
3499                                  "but client[%s] and server[%s] mismatch\n",
3500                                  client_signing, server_signing));
3501                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
3502                         return;
3503                 }
3504
3505         } else if (conn->protocol >= PROTOCOL_LANMAN1) {
3506                 DATA_BLOB blob1;
3507                 uint8_t key_len;
3508                 time_t t;
3509
3510                 if (wct != 0x0D) {
3511                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3512                         return;
3513                 }
3514
3515                 server_security_mode = SVAL(vwv + 1, 0);
3516                 server_max_xmit = SVAL(vwv + 2, 0);
3517                 server_max_mux = SVAL(vwv + 3, 0);
3518                 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
3519                 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
3520                 server_session_key = IVAL(vwv + 6, 0);
3521                 server_time_zone = SVALS(vwv + 10, 0);
3522                 server_time_zone *= 60;
3523                 /* this time is converted to GMT by make_unix_date */
3524                 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
3525                 unix_to_nt_time(&server_system_time, t);
3526                 key_len = SVAL(vwv + 11, 0);
3527
3528                 if (num_bytes < key_len) {
3529                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3530                         return;
3531                 }
3532
3533                 if (key_len != 0 && key_len != 8) {
3534                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3535                         return;
3536                 }
3537
3538                 if (key_len == 8) {
3539                         memcpy(server_challenge, bytes, 8);
3540                 }
3541
3542                 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
3543                 if (blob1.length > 0) {
3544                         size_t len;
3545                         bool ok;
3546
3547                         len = utf16_len_n(blob1.data,
3548                                           blob1.length);
3549                         blob1.length = len;
3550
3551                         ok = convert_string_talloc(state,
3552                                                    CH_DOS,
3553                                                    CH_UNIX,
3554                                                    blob1.data,
3555                                                    blob1.length,
3556                                                    &server_workgroup,
3557                                                    &len);
3558                         if (!ok) {
3559                                 status = map_nt_error_from_unix_common(errno);
3560                                 tevent_req_nterror(req, status);
3561                                 return;
3562                         }
3563                 }
3564
3565         } else {
3566                 /* the old core protocol */
3567                 server_time_zone = get_time_zone(time(NULL));
3568                 server_max_xmit = 1024;
3569                 server_max_mux = 1;
3570         }
3571
3572         if (server_max_xmit < 1024) {
3573                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3574                 return;
3575         }
3576
3577         if (server_max_mux < 1) {
3578                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3579                 return;
3580         }
3581
3582         /*
3583          * Now calculate the negotiated capabilities
3584          * based on the mask for:
3585          * - client only flags
3586          * - flags used in both directions
3587          * - server only flags
3588          */
3589         both_capabilities = client_capabilities & server_capabilities;
3590         capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
3591         capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
3592         capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
3593
3594         max_xmit = MIN(client_max_xmit, server_max_xmit);
3595
3596         conn->smb1.server.capabilities = server_capabilities;
3597         conn->smb1.capabilities = capabilities;
3598
3599         conn->smb1.server.max_xmit = server_max_xmit;
3600         conn->smb1.max_xmit = max_xmit;
3601
3602         conn->smb1.server.max_mux = server_max_mux;
3603
3604         conn->smb1.server.security_mode = server_security_mode;
3605
3606         conn->smb1.server.readbraw = server_readbraw;
3607         conn->smb1.server.writebraw = server_writebraw;
3608         conn->smb1.server.lockread = server_lockread;
3609         conn->smb1.server.writeunlock = server_writeunlock;
3610
3611         conn->smb1.server.session_key = server_session_key;
3612
3613         talloc_steal(conn, server_gss_blob.data);
3614         conn->smb1.server.gss_blob = server_gss_blob;
3615         conn->smb1.server.guid = server_guid;
3616         memcpy(conn->smb1.server.challenge, server_challenge, 8);
3617         conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
3618         conn->smb1.server.name = talloc_move(conn, &server_name);
3619
3620         conn->smb1.server.time_zone = server_time_zone;
3621         conn->smb1.server.system_time = server_system_time;
3622
3623         tevent_req_done(req);
3624 }
3625
3626 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
3627 {
3628         size_t i;
3629         uint8_t *buf;
3630         uint16_t dialect_count = 0;
3631
3632         buf = state->smb2.dyn;
3633         for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
3634                 if (smb2cli_prots[i].proto < state->min_protocol) {
3635                         continue;
3636                 }
3637
3638                 if (smb2cli_prots[i].proto > state->max_protocol) {
3639                         continue;
3640                 }
3641
3642                 SSVAL(buf, dialect_count*2, smb2cli_prots[i].smb2_dialect);
3643                 dialect_count++;
3644         }
3645
3646         buf = state->smb2.fixed;
3647         SSVAL(buf, 0, 36);
3648         SSVAL(buf, 2, dialect_count);
3649         SSVAL(buf, 4, state->conn->smb2.client.security_mode);
3650         SSVAL(buf, 6, 0);       /* Reserved */
3651         SSVAL(buf, 8, 0);       /* Capabilities */
3652         if (state->max_protocol >= PROTOCOL_SMB2_10) {
3653                 NTSTATUS status;
3654                 DATA_BLOB blob;
3655
3656                 status = GUID_to_ndr_blob(&state->conn->smb2.client.guid,
3657                                           state, &blob);
3658                 if (!NT_STATUS_IS_OK(status)) {
3659                         return NULL;
3660                 }
3661                 memcpy(buf+12, blob.data, 16); /* ClientGuid */
3662         } else {
3663                 memset(buf+12, 0, 16);  /* ClientGuid */
3664         }
3665         SBVAL(buf, 28, 0);      /* ClientStartTime */
3666
3667         return smb2cli_req_send(state, state->ev,
3668                                 state->conn, SMB2_OP_NEGPROT,
3669                                 0, 0, /* flags */
3670                                 state->timeout_msec,
3671                                 0xFEFF, 0, NULL, /* pid, tid, session */
3672                                 state->smb2.fixed, sizeof(state->smb2.fixed),
3673                                 state->smb2.dyn, dialect_count*2);
3674 }
3675
3676 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
3677 {
3678         struct tevent_req *req =
3679                 tevent_req_callback_data(subreq,
3680                 struct tevent_req);
3681         struct smbXcli_negprot_state *state =
3682                 tevent_req_data(req,
3683                 struct smbXcli_negprot_state);
3684         struct smbXcli_conn *conn = state->conn;
3685         size_t security_offset, security_length;
3686         DATA_BLOB blob;
3687         NTSTATUS status;
3688         struct iovec *iov;
3689         uint8_t *body;
3690         size_t i;
3691         uint16_t dialect_revision;
3692         static const struct smb2cli_req_expected_response expected[] = {
3693         {
3694                 .status = NT_STATUS_OK,
3695                 .body_size = 0x41
3696         }
3697         };
3698
3699         status = smb2cli_req_recv(subreq, state, &iov,
3700                                   expected, ARRAY_SIZE(expected));
3701         TALLOC_FREE(subreq);
3702         if (tevent_req_nterror(req, status)) {
3703                 return;
3704         }
3705
3706         body = (uint8_t *)iov[1].iov_base;
3707
3708         dialect_revision = SVAL(body, 4);
3709
3710         for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
3711                 if (smb2cli_prots[i].proto < state->min_protocol) {
3712                         continue;
3713                 }
3714
3715                 if (smb2cli_prots[i].proto > state->max_protocol) {
3716                         continue;
3717                 }
3718
3719                 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
3720                         continue;
3721                 }
3722
3723                 conn->protocol = smb2cli_prots[i].proto;
3724                 break;
3725         }
3726
3727         if (conn->protocol == PROTOCOL_NONE) {
3728                 if (state->min_protocol >= PROTOCOL_SMB2_02) {
3729                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3730                         return;
3731                 }
3732
3733                 if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
3734                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3735                         return;
3736                 }
3737
3738                 /* make sure we do not loop forever */
3739                 state->min_protocol = PROTOCOL_SMB2_02;
3740
3741                 /*
3742                  * send a SMB2 negprot, in order to negotiate
3743                  * the SMB2 dialect. This needs to use the
3744                  * message id 1.
3745                  */
3746                 state->conn->smb2.mid = 1;
3747                 subreq = smbXcli_negprot_smb2_subreq(state);
3748                 if (tevent_req_nomem(subreq, req)) {
3749                         return;
3750                 }
3751                 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
3752                 return;
3753         }
3754
3755         conn->smb2.server.security_mode = SVAL(body, 2);
3756
3757         blob = data_blob_const(body + 8, 16);
3758         status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
3759         if (tevent_req_nterror(req, status)) {
3760                 return;
3761         }
3762
3763         conn->smb2.server.capabilities  = IVAL(body, 24);
3764         conn->smb2.server.max_trans_size= IVAL(body, 28);
3765         conn->smb2.server.max_read_size = IVAL(body, 32);
3766         conn->smb2.server.max_write_size= IVAL(body, 36);
3767         conn->smb2.server.system_time   = BVAL(body, 40);
3768         conn->smb2.server.start_time    = BVAL(body, 48);
3769
3770         security_offset = SVAL(body, 56);
3771         security_length = SVAL(body, 58);
3772
3773         if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
3774                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3775                 return;
3776         }
3777
3778         if (security_length > iov[2].iov_len) {
3779                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3780                 return;
3781         }
3782
3783         conn->smb2.server.gss_blob = data_blob_talloc(conn,
3784                                                 iov[2].iov_base,
3785                                                 security_length);
3786         if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
3787                 return;
3788         }
3789
3790         tevent_req_done(req);
3791 }
3792
3793 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
3794                                                   TALLOC_CTX *tmp_mem,
3795                                                   uint8_t *inbuf)
3796 {
3797         size_t num_pending = talloc_array_length(conn->pending);
3798         struct tevent_req *subreq;
3799         struct smbXcli_req_state *substate;
3800         struct tevent_req *req;
3801         uint32_t protocol_magic = IVAL(inbuf, 4);
3802
3803         if (num_pending != 1) {
3804                 return NT_STATUS_INTERNAL_ERROR;
3805         }
3806
3807         subreq = conn->pending[0];
3808         substate = tevent_req_data(subreq, struct smbXcli_req_state);
3809         req = tevent_req_callback_data(subreq, struct tevent_req);
3810
3811         switch (protocol_magic) {
3812         case SMB_MAGIC:
3813                 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
3814                 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
3815                 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
3816
3817         case SMB2_MAGIC:
3818                 if (substate->smb2.recv_iov == NULL) {
3819                         /*
3820                          * For the SMB1 negprot we have move it.
3821                          */
3822                         substate->smb2.recv_iov = substate->smb1.recv_iov;
3823                         substate->smb1.recv_iov = NULL;
3824                 }
3825
3826                 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
3827                 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3828                 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
3829         }
3830
3831         DEBUG(10, ("Got non-SMB PDU\n"));
3832         return NT_STATUS_INVALID_NETWORK_RESPONSE;
3833 }
3834
3835 NTSTATUS smbXcli_negprot_recv(struct tevent_req *req)
3836 {
3837         return tevent_req_simple_recv_ntstatus(req);
3838 }
3839
3840 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
3841                          uint32_t timeout_msec,
3842                          enum protocol_types min_protocol,
3843                          enum protocol_types max_protocol)
3844 {
3845         TALLOC_CTX *frame = talloc_stackframe();
3846         struct tevent_context *ev;
3847         struct tevent_req *req;
3848         NTSTATUS status = NT_STATUS_NO_MEMORY;
3849         bool ok;
3850
3851         if (smbXcli_conn_has_async_calls(conn)) {
3852                 /*
3853                  * Can't use sync call while an async call is in flight
3854                  */
3855                 status = NT_STATUS_INVALID_PARAMETER_MIX;
3856                 goto fail;
3857         }
3858         ev = tevent_context_init(frame);
3859         if (ev == NULL) {
3860                 goto fail;
3861         }
3862         req = smbXcli_negprot_send(frame, ev, conn, timeout_msec,
3863                                    min_protocol, max_protocol);
3864         if (req == NULL) {
3865                 goto fail;
3866         }
3867         ok = tevent_req_poll(req, ev);
3868         if (!ok) {
3869                 status = map_nt_error_from_unix_common(errno);
3870                 goto fail;
3871         }
3872         status = smbXcli_negprot_recv(req);
3873  fail:
3874         TALLOC_FREE(frame);
3875         return status;
3876 }
3877
3878 static int smbXcli_session_destructor(struct smbXcli_session *session)
3879 {
3880         if (session->conn == NULL) {
3881                 return 0;
3882         }
3883
3884         DLIST_REMOVE(session->conn->sessions, session);
3885         return 0;
3886 }
3887
3888 struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
3889                                                struct smbXcli_conn *conn)
3890 {
3891         struct smbXcli_session *session;
3892
3893         session = talloc_zero(mem_ctx, struct smbXcli_session);
3894         if (session == NULL) {
3895                 return NULL;
3896         }
3897         talloc_set_destructor(session, smbXcli_session_destructor);
3898
3899         DLIST_ADD_END(conn->sessions, session, struct smbXcli_session *);
3900         session->conn = conn;
3901
3902         return session;
3903 }
3904
3905 uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
3906 {
3907         struct smbXcli_conn *conn = session->conn;
3908         uint8_t security_mode = 0;
3909
3910         if (conn == NULL) {
3911                 return security_mode;
3912         }
3913
3914         security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
3915         if (conn->mandatory_signing) {
3916                 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
3917         }
3918
3919         return security_mode;
3920 }
3921
3922 uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
3923 {
3924         return session->smb2.session_id;
3925 }
3926
3927 void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
3928                                       uint64_t session_id,
3929                                       uint16_t session_flags)
3930 {
3931         session->smb2.session_id = session_id;
3932         session->smb2.session_flags = session_flags;
3933 }
3934
3935 NTSTATUS smb2cli_session_update_session_key(struct smbXcli_session *session,
3936                                             const DATA_BLOB session_key,
3937                                             const struct iovec *recv_iov)
3938 {
3939         struct smbXcli_conn *conn = session->conn;
3940         uint16_t no_sign_flags;
3941         DATA_BLOB signing_key;
3942         NTSTATUS status;
3943
3944         if (conn == NULL) {
3945                 return NT_STATUS_INVALID_PARAMETER_MIX;
3946         }
3947
3948         no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST | SMB2_SESSION_FLAG_IS_NULL;
3949
3950         if (session->smb2.session_flags & no_sign_flags) {
3951                 session->smb2.should_sign = false;
3952                 return NT_STATUS_OK;
3953         }
3954
3955         if (session->smb2.signing_key.length > 0) {
3956                 signing_key = session->smb2.signing_key;
3957         } else {
3958                 signing_key = session_key;
3959         }
3960         if (session->smb2.channel_setup) {
3961                 signing_key = session_key;
3962         }
3963
3964         status = smb2_signing_check_pdu(signing_key, recv_iov, 3);
3965         if (!NT_STATUS_IS_OK(status)) {
3966                 return status;
3967         }
3968
3969         if (!session->smb2.channel_setup) {
3970                 session->smb2.session_key = data_blob_dup_talloc(session,
3971                                                                  session_key);
3972                 if (session->smb2.session_key.data == NULL) {
3973                         return NT_STATUS_NO_MEMORY;
3974                 }
3975         }
3976
3977         if (session->smb2.channel_setup) {
3978                 data_blob_free(&session->smb2.signing_key);
3979                 session->smb2.channel_setup = false;
3980         }
3981
3982         if (session->smb2.signing_key.length > 0) {
3983                 return NT_STATUS_OK;
3984         }
3985
3986         session->smb2.signing_key = data_blob_dup_talloc(session, signing_key);
3987         if (session->smb2.signing_key.data == NULL) {
3988                 return NT_STATUS_NO_MEMORY;
3989         }
3990
3991         session->smb2.should_sign = false;
3992
3993         if (conn->desire_signing) {
3994                 session->smb2.should_sign = true;
3995         }
3996
3997         if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
3998                 session->smb2.should_sign = true;
3999         }
4000
4001         return NT_STATUS_OK;
4002 }
4003
4004 NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
4005                                         struct smbXcli_session *session1,
4006                                         struct smbXcli_conn *conn,
4007                                         struct smbXcli_session **_session2)
4008 {
4009         struct smbXcli_session *session2;
4010         uint16_t no_sign_flags;
4011
4012         no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST | SMB2_SESSION_FLAG_IS_NULL;
4013
4014         if (session1->smb2.session_flags & no_sign_flags) {
4015                 return NT_STATUS_INVALID_PARAMETER_MIX;
4016         }
4017
4018         if (session1->smb2.session_key.length == 0) {
4019                 return NT_STATUS_INVALID_PARAMETER_MIX;
4020         }
4021
4022         if (session1->smb2.signing_key.length == 0) {
4023                 return NT_STATUS_INVALID_PARAMETER_MIX;
4024         }
4025
4026         if (conn == NULL) {
4027                 return NT_STATUS_INVALID_PARAMETER_MIX;
4028         }
4029
4030         session2 = talloc_zero(mem_ctx, struct smbXcli_session);
4031         if (session2 == NULL) {
4032                 return NT_STATUS_NO_MEMORY;
4033         }
4034         session2->smb2.session_id = session1->smb2.session_id;
4035         session2->smb2.session_flags = session1->smb2.session_flags;
4036
4037         session2->smb2.session_key = data_blob_dup_talloc(session2,
4038                                                 session1->smb2.session_key);
4039         if (session2->smb2.session_key.data == NULL) {
4040                 return NT_STATUS_NO_MEMORY;
4041         }
4042
4043         session2->smb2.signing_key = data_blob_dup_talloc(session2,
4044                                                 session1->smb2.signing_key);
4045         if (session2->smb2.signing_key.data == NULL) {
4046                 return NT_STATUS_NO_MEMORY;
4047         }
4048
4049         session2->smb2.should_sign = session1->smb2.should_sign;
4050         session2->smb2.channel_setup = true;
4051
4052         talloc_set_destructor(session2, smbXcli_session_destructor);
4053         DLIST_ADD_END(conn->sessions, session2, struct smbXcli_session *);
4054         session2->conn = conn;
4055
4056         *_session2 = session2;
4057         return NT_STATUS_OK;
4058 }