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 "../libcli/smb/smb_common.h"
  28 #include "../libcli/smb/smb_seal.h"
  29 #include "../libcli/smb/smb_signing.h"
  30 #include "../libcli/smb/read_smb.h"
  31 #include "smbXcli_base.h"
  32 #include "librpc/ndr/libndr.h"
  33
  34 struct smbXcli_conn {
  35         int fd;
  36         struct sockaddr_storage local_ss;
  37         struct sockaddr_storage remote_ss;
  38         const char *remote_name;
  39
  40         struct tevent_queue *outgoing;
  41         struct tevent_req **pending;
  42         struct tevent_req *read_smb_req;
  43
  44         enum protocol_types protocol;
  45         bool allow_signing;
  46         bool desire_signing;
  47         bool mandatory_signing;
  48
  49         /*
  50          * The incoming dispatch function should return:
  51          * - NT_STATUS_RETRY, if more incoming PDUs are expected.
  52          * - NT_STATUS_OK, if no more processing is desired, e.g.
  53          *                 the dispatch function called
  54          *                 tevent_req_done().
  55          * - All other return values disconnect the connection.
  56          */
  57         NTSTATUS (*dispatch_incoming)(struct smbXcli_conn *conn,
  58                                       TALLOC_CTX *tmp_mem,
  59                                       uint8_t *inbuf);
  60
  61         struct {
  62                 struct {
  63                         uint32_t capabilities;
  64                         uint32_t max_xmit;
  65                 } client;
  66
  67                 struct {
  68                         uint32_t capabilities;
  69                         uint32_t max_xmit;
  70                         uint16_t max_mux;
  71                         uint16_t security_mode;
  72                         bool readbraw;
  73                         bool writebraw;
  74                         bool lockread;
  75                         bool writeunlock;
  76                         uint32_t session_key;
  77                         struct GUID guid;
  78                         DATA_BLOB gss_blob;
  79                         uint8_t challenge[8];
  80                         const char *workgroup;
  81                         const char *name;
  82                         int time_zone;
  83                         NTTIME system_time;
  84                 } server;
  85
  86                 uint32_t capabilities;
  87                 uint32_t max_xmit;
  88
  89                 uint16_t mid;
  90
  91                 struct smb_signing_state *signing;
  92                 struct smb_trans_enc_state *trans_enc;
  93         } smb1;
  94
  95         struct {
  96                 struct {
  97                         uint16_t security_mode;
  98                         struct GUID guid;
  99                 } client;
 100
 101                 struct {
 102                         uint32_t capabilities;
 103                         uint16_t security_mode;
 104                         struct GUID guid;
 105                         uint32_t max_trans_size;
 106                         uint32_t max_read_size;
 107                         uint32_t max_write_size;
 108                         NTTIME system_time;
 109                         NTTIME start_time;
 110                         DATA_BLOB gss_blob;
 111                 } server;
 112
 113                 uint64_t mid;
 114         } smb2;
 115 };
 116
 117 struct smbXcli_req_state {
 118         struct tevent_context *ev;
 119         struct smbXcli_conn *conn;
 120
 121         uint8_t length_hdr[4];
 122
 123         bool one_way;
 124
 125         uint8_t *inbuf;
 126
 127         struct {
 128                 /* Space for the header including the wct */
 129                 uint8_t hdr[HDR_VWV];
 130
 131                 /*
 132                  * For normal requests, smb1cli_req_send chooses a mid.
 133                  * SecondaryV trans requests need to use the mid of the primary
 134                  * request, so we need a place to store it.
 135                  * Assume it is set if != 0.
 136                  */
 137                 uint16_t mid;
 138
 139                 uint16_t *vwv;
 140                 uint8_t bytecount_buf[2];
 141
 142 #define MAX_SMB_IOV 5
 143                 /* length_hdr, hdr, words, byte_count, buffers */
 144                 struct iovec iov[1 + 3 + MAX_SMB_IOV];
 145                 int iov_count;
 146
 147                 uint32_t seqnum;
 148                 struct tevent_req **chained_requests;
 149
 150                 uint8_t recv_cmd;
 151                 NTSTATUS recv_status;
 152                 /* always an array of 3 talloc elements */
 153                 struct iovec *recv_iov;
 154         } smb1;
 155
 156         struct {
 157                 const uint8_t *fixed;
 158                 uint16_t fixed_len;
 159                 const uint8_t *dyn;
 160                 uint32_t dyn_len;
 161
 162                 uint8_t hdr[64];
 163                 uint8_t pad[7]; /* padding space for compounding */
 164
 165                 /* always an array of 3 talloc elements */
 166                 struct iovec *recv_iov;
 167         } smb2;
 168 };
 169
 170 static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
 171 {
 172         /*
 173          * NT_STATUS_OK, means we do not notify the callers
 174          */
 175         smbXcli_conn_disconnect(conn, NT_STATUS_OK);
 176
 177         if (conn->smb1.trans_enc) {
 178                 common_free_encryption_state(&conn->smb1.trans_enc);
 179         }
 180
 181         return 0;
 182 }
 183
 184 struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
 185                                          int fd,
 186                                          const char *remote_name,
 187                                          enum smb_signing_setting signing_state,
 188                                          uint32_t smb1_capabilities,
 189                                          struct GUID *client_guid)
 190 {
 191         struct smbXcli_conn *conn = NULL;
 192         void *ss = NULL;
 193         struct sockaddr *sa = NULL;
 194         socklen_t sa_length;
 195         int ret;
 196
 197         conn = talloc_zero(mem_ctx, struct smbXcli_conn);
 198         if (!conn) {
 199                 return NULL;
 200         }
 201
 202         conn->remote_name = talloc_strdup(conn, remote_name);
 203         if (conn->remote_name == NULL) {
 204                 goto error;
 205         }
 206
 207         conn->fd = fd;
 208
 209         ss = (void *)&conn->local_ss;
 210         sa = (struct sockaddr *)ss;
 211         sa_length = sizeof(conn->local_ss);
 212         ret = getsockname(fd, sa, &sa_length);
 213         if (ret == -1) {
 214                 goto error;
 215         }
 216         ss = (void *)&conn->remote_ss;
 217         sa = (struct sockaddr *)ss;
 218         sa_length = sizeof(conn->remote_ss);
 219         ret = getpeername(fd, sa, &sa_length);
 220         if (ret == -1) {
 221                 goto error;
 222         }
 223
 224         conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
 225         if (conn->outgoing == NULL) {
 226                 goto error;
 227         }
 228         conn->pending = NULL;
 229
 230         conn->protocol = PROTOCOL_NONE;
 231
 232         switch (signing_state) {
 233         case SMB_SIGNING_OFF:
 234                 /* never */
 235                 conn->allow_signing = false;
 236                 conn->desire_signing = false;
 237                 conn->mandatory_signing = false;
 238                 break;
 239         case SMB_SIGNING_DEFAULT:
 240         case SMB_SIGNING_IF_REQUIRED:
 241                 /* if the server requires it */
 242                 conn->allow_signing = true;
 243                 conn->desire_signing = false;
 244                 conn->mandatory_signing = false;
 245                 break;
 246         case SMB_SIGNING_REQUIRED:
 247                 /* always */
 248                 conn->allow_signing = true;
 249                 conn->desire_signing = true;
 250                 conn->mandatory_signing = true;
 251                 break;
 252         }
 253
 254         conn->smb1.client.capabilities = smb1_capabilities;
 255         conn->smb1.client.max_xmit = UINT16_MAX;
 256
 257         conn->smb1.capabilities = conn->smb1.client.capabilities;
 258         conn->smb1.max_xmit = 1024;
 259
 260         conn->smb1.mid = 1;
 261
 262         /* initialise signing */
 263         conn->smb1.signing = smb_signing_init(conn,
 264                                               conn->allow_signing,
 265                                               conn->desire_signing,
 266                                               conn->mandatory_signing);
 267         if (!conn->smb1.signing) {
 268                 goto error;
 269         }
 270
 271         conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
 272         if (conn->mandatory_signing) {
 273                 conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
 274         }
 275         if (client_guid) {
 276                 conn->smb2.client.guid = *client_guid;
 277         }
 278
 279         talloc_set_destructor(conn, smbXcli_conn_destructor);
 280         return conn;
 281
 282  error:
 283         TALLOC_FREE(conn);
 284         return NULL;
 285 }
 286
 287 bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
 288 {
 289         if (conn == NULL) {
 290                 return false;
 291         }
 292
 293         if (conn->fd == -1) {
 294                 return false;
 295         }
 296
 297         return true;
 298 }
 299
 300 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
 301 {
 302         return conn->protocol;
 303 }
 304
 305 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
 306 {
 307         if (conn->protocol >= PROTOCOL_SMB2_02) {
 308                 return true;
 309         }
 310
 311         if (conn->smb1.capabilities & CAP_UNICODE) {
 312                 return true;
 313         }
 314
 315         return false;
 316 }
 317
 318 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
 319 {
 320         set_socket_options(conn->fd, options);
 321 }
 322
 323 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
 324 {
 325         return &conn->local_ss;
 326 }
 327
 328 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
 329 {
 330         return &conn->remote_ss;
 331 }
 332
 333 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
 334 {
 335         return conn->remote_name;
 336 }
 337
 338 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
 339 {
 340         if (conn->protocol >= PROTOCOL_SMB2_02) {
 341                 /*
 342                  * TODO...
 343                  */
 344                 return 1;
 345         }
 346
 347         return conn->smb1.server.max_mux;
 348 }
 349
 350 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
 351 {
 352         if (conn->protocol >= PROTOCOL_SMB2_02) {
 353                 return conn->smb2.server.system_time;
 354         }
 355
 356         return conn->smb1.server.system_time;
 357 }
 358
 359 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
 360 {
 361         if (conn->protocol >= PROTOCOL_SMB2_02) {
 362                 return &conn->smb2.server.gss_blob;
 363         }
 364
 365         return &conn->smb1.server.gss_blob;
 366 }
 367
 368 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
 369 {
 370         if (conn->protocol >= PROTOCOL_SMB2_02) {
 371                 return &conn->smb2.server.guid;
 372         }
 373
 374         return &conn->smb1.server.guid;
 375 }
 376
 377 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
 378 {
 379         return conn->smb1.capabilities;
 380 }
 381
 382 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
 383 {
 384         return conn->smb1.max_xmit;
 385 }
 386
 387 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
 388 {
 389         return conn->smb1.server.session_key;
 390 }
 391
 392 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
 393 {
 394         return conn->smb1.server.challenge;
 395 }
 396
 397 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
 398 {
 399         return conn->smb1.server.security_mode;
 400 }
 401
 402 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
 403 {
 404         return conn->smb1.server.time_zone;
 405 }
 406
 407 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
 408                                    const DATA_BLOB user_session_key,
 409                                    const DATA_BLOB response)
 410 {
 411         return smb_signing_activate(conn->smb1.signing,
 412                                     user_session_key,
 413                                     response);
 414 }
 415
 416 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
 417                                 const uint8_t *buf, uint32_t seqnum)
 418 {
 419         return smb_signing_check_pdu(conn->smb1.signing, buf, seqnum);
 420 }
 421
 422 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
 423 {
 424         return smb_signing_is_active(conn->smb1.signing);
 425 }
 426
 427 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
 428                                  struct smb_trans_enc_state *es)
 429 {
 430         /* Replace the old state, if any. */
 431         if (conn->smb1.trans_enc) {
 432                 common_free_encryption_state(&conn->smb1.trans_enc);
 433         }
 434         conn->smb1.trans_enc = es;
 435 }
 436
 437 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
 438 {
 439         return common_encryption_on(conn->smb1.trans_enc);
 440 }
 441
 442
 443 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
 444 {
 445         uint32_t flags2 = SVAL(hdr, HDR_FLG2);
 446         NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
 447
 448         if (NT_STATUS_IS_OK(status)) {
 449                 return NT_STATUS_OK;
 450         }
 451
 452         if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
 453                 return status;
 454         }
 455
 456         return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
 457 }
 458
 459 /**
 460  * Is the SMB command able to hold an AND_X successor
 461  * @param[in] cmd       The SMB command in question
 462  * @retval Can we add a chained request after "cmd"?
 463  */
 464 bool smb1cli_is_andx_req(uint8_t cmd)
 465 {
 466         switch (cmd) {
 467         case SMBtconX:
 468         case SMBlockingX:
 469         case SMBopenX:
 470         case SMBreadX:
 471         case SMBwriteX:
 472         case SMBsesssetupX:
 473         case SMBulogoffX:
 474         case SMBntcreateX:
 475                 return true;
 476                 break;
 477         default:
 478                 break;
 479         }
 480
 481         return false;
 482 }
 483
 484 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
 485 {
 486         size_t num_pending = talloc_array_length(conn->pending);
 487         uint16_t result;
 488
 489         while (true) {
 490                 size_t i;
 491
 492                 result = conn->smb1.mid++;
 493                 if ((result == 0) || (result == 0xffff)) {
 494                         continue;
 495                 }
 496
 497                 for (i=0; i<num_pending; i++) {
 498                         if (result == smb1cli_req_mid(conn->pending[i])) {
 499                                 break;
 500                         }
 501                 }
 502
 503                 if (i == num_pending) {
 504                         return result;
 505                 }
 506         }
 507 }
 508
 509 void smbXcli_req_unset_pending(struct tevent_req *req)
 510 {
 511         struct smbXcli_req_state *state =
 512                 tevent_req_data(req,
 513                 struct smbXcli_req_state);
 514         struct smbXcli_conn *conn = state->conn;
 515         size_t num_pending = talloc_array_length(conn->pending);
 516         size_t i;
 517
 518         if (state->smb1.mid != 0) {
 519                 /*
 520                  * This is a [nt]trans[2] request which waits
 521                  * for more than one reply.
 522                  */
 523                 return;
 524         }
 525
 526         talloc_set_destructor(req, NULL);
 527
 528         if (num_pending == 1) {
 529                 /*
 530                  * The pending read_smb tevent_req is a child of
 531                  * conn->pending. So if nothing is pending anymore, we need to
 532                  * delete the socket read fde.
 533                  */
 534                 TALLOC_FREE(conn->pending);
 535                 conn->read_smb_req = NULL;
 536                 return;
 537         }
 538
 539         for (i=0; i<num_pending; i++) {
 540                 if (req == conn->pending[i]) {
 541                         break;
 542                 }
 543         }
 544         if (i == num_pending) {
 545                 /*
 546                  * Something's seriously broken. Just returning here is the
 547                  * right thing nevertheless, the point of this routine is to
 548                  * remove ourselves from conn->pending.
 549                  */
 550                 return;
 551         }
 552
 553         /*
 554          * Remove ourselves from the conn->pending array
 555          */
 556         for (; i < (num_pending - 1); i++) {
 557                 conn->pending[i] = conn->pending[i+1];
 558         }
 559
 560         /*
 561          * No NULL check here, we're shrinking by sizeof(void *), and
 562          * talloc_realloc just adjusts the size for this.
 563          */
 564         conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
 565                                        num_pending - 1);
 566         return;
 567 }
 568
 569 static int smbXcli_req_destructor(struct tevent_req *req)
 570 {
 571         struct smbXcli_req_state *state =
 572                 tevent_req_data(req,
 573                 struct smbXcli_req_state);
 574
 575         /*
 576          * Make sure we really remove it from
 577          * the pending array on destruction.
 578          */
 579         state->smb1.mid = 0;
 580         smbXcli_req_unset_pending(req);
 581         return 0;
 582 }
 583
 584 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
 585
 586 bool smbXcli_req_set_pending(struct tevent_req *req)
 587 {
 588         struct smbXcli_req_state *state =
 589                 tevent_req_data(req,
 590                 struct smbXcli_req_state);
 591         struct smbXcli_conn *conn;
 592         struct tevent_req **pending;
 593         size_t num_pending;
 594
 595         conn = state->conn;
 596
 597         if (!smbXcli_conn_is_connected(conn)) {
 598                 return false;
 599         }
 600
 601         num_pending = talloc_array_length(conn->pending);
 602
 603         pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
 604                                  num_pending+1);
 605         if (pending == NULL) {
 606                 return false;
 607         }
 608         pending[num_pending] = req;
 609         conn->pending = pending;
 610         talloc_set_destructor(req, smbXcli_req_destructor);
 611
 612         if (!smbXcli_conn_receive_next(conn)) {
 613                 /*
 614                  * the caller should notify the current request
 615                  *
 616                  * And all other pending requests get notified
 617                  * by smbXcli_conn_disconnect().
 618                  */
 619                 smbXcli_req_unset_pending(req);
 620                 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
 621                 return false;
 622         }
 623
 624         return true;
 625 }
 626
 627 static void smbXcli_conn_received(struct tevent_req *subreq);
 628
 629 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
 630 {
 631         size_t num_pending = talloc_array_length(conn->pending);
 632         struct tevent_req *req;
 633         struct smbXcli_req_state *state;
 634
 635         if (conn->read_smb_req != NULL) {
 636                 return true;
 637         }
 638
 639         if (num_pending == 0) {
 640                 if (conn->smb2.mid < UINT64_MAX) {
 641                         /* no more pending requests, so we are done for now */
 642                         return true;
 643                 }
 644
 645                 /*
 646                  * If there are no more SMB2 requests possible,
 647                  * because we are out of message ids,
 648                  * we need to disconnect.
 649                  */
 650                 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
 651                 return true;
 652         }
 653
 654         req = conn->pending[0];
 655         state = tevent_req_data(req, struct smbXcli_req_state);
 656
 657         /*
 658          * We're the first ones, add the read_smb request that waits for the
 659          * answer from the server
 660          */
 661         conn->read_smb_req = read_smb_send(conn->pending, state->ev, conn->fd);
 662         if (conn->read_smb_req == NULL) {
 663                 return false;
 664         }
 665         tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
 666         return true;
 667 }
 668
 669 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
 670 {
 671         if (conn->fd != -1) {
 672                 close(conn->fd);
 673         }
 674         conn->fd = -1;
 675
 676         /*
 677          * Cancel all pending requests. We do not do a for-loop walking
 678          * conn->pending because that array changes in
 679          * smbXcli_req_unset_pending.
 680          */
 681         while (talloc_array_length(conn->pending) > 0) {
 682                 struct tevent_req *req;
 683                 struct smbXcli_req_state *state;
 684                 struct tevent_req **chain;
 685                 size_t num_chained;
 686                 size_t i;
 687
 688                 req = conn->pending[0];
 689                 state = tevent_req_data(req, struct smbXcli_req_state);
 690
 691                 if (state->smb1.chained_requests == NULL) {
 692                         /*
 693                          * We're dead. No point waiting for trans2
 694                          * replies.
 695                          */
 696                         state->smb1.mid = 0;
 697
 698                         smbXcli_req_unset_pending(req);
 699
 700                         if (NT_STATUS_IS_OK(status)) {
 701                                 /* do not notify the callers */
 702                                 continue;
 703                         }
 704
 705                         /*
 706                          * we need to defer the callback, because we may notify
 707                          * more then one caller.
 708                          */
 709                         tevent_req_defer_callback(req, state->ev);
 710                         tevent_req_nterror(req, status);
 711                         continue;
 712                 }
 713
 714                 chain = talloc_move(conn, &state->smb1.chained_requests);
 715                 num_chained = talloc_array_length(chain);
 716
 717                 for (i=0; i<num_chained; i++) {
 718                         req = chain[i];
 719                         state = tevent_req_data(req, struct smbXcli_req_state);
 720
 721                         /*
 722                          * We're dead. No point waiting for trans2
 723                          * replies.
 724                          */
 725                         state->smb1.mid = 0;
 726
 727                         smbXcli_req_unset_pending(req);
 728
 729                         if (NT_STATUS_IS_OK(status)) {
 730                                 /* do not notify the callers */
 731                                 continue;
 732                         }
 733
 734                         /*
 735                          * we need to defer the callback, because we may notify
 736                          * more then one caller.
 737                          */
 738                         tevent_req_defer_callback(req, state->ev);
 739                         tevent_req_nterror(req, status);
 740                 }
 741                 TALLOC_FREE(chain);
 742         }
 743 }
 744
 745 /*
 746  * Fetch a smb request's mid. Only valid after the request has been sent by
 747  * smb1cli_req_send().
 748  */
 749 uint16_t smb1cli_req_mid(struct tevent_req *req)
 750 {
 751         struct smbXcli_req_state *state =
 752                 tevent_req_data(req,
 753                 struct smbXcli_req_state);
 754
 755         if (state->smb1.mid != 0) {
 756                 return state->smb1.mid;
 757         }
 758
 759         return SVAL(state->smb1.hdr, HDR_MID);
 760 }
 761
 762 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
 763 {
 764         struct smbXcli_req_state *state =
 765                 tevent_req_data(req,
 766                 struct smbXcli_req_state);
 767
 768         state->smb1.mid = mid;
 769 }
 770
 771 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
 772 {
 773         struct smbXcli_req_state *state =
 774                 tevent_req_data(req,
 775                 struct smbXcli_req_state);
 776
 777         return state->smb1.seqnum;
 778 }
 779
 780 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
 781 {
 782         struct smbXcli_req_state *state =
 783                 tevent_req_data(req,
 784                 struct smbXcli_req_state);
 785
 786         state->smb1.seqnum = seqnum;
 787 }
 788
 789 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
 790 {
 791         size_t result = 0;
 792         int i;
 793         for (i=0; i<count; i++) {
 794                 result += iov[i].iov_len;
 795         }
 796         return result;
 797 }
 798
 799 static uint8_t *smbXcli_iov_concat(TALLOC_CTX *mem_ctx,
 800                                    const struct iovec *iov,
 801                                    int count)
 802 {
 803         size_t len = smbXcli_iov_len(iov, count);
 804         size_t copied;
 805         uint8_t *buf;
 806         int i;
 807
 808         buf = talloc_array(mem_ctx, uint8_t, len);
 809         if (buf == NULL) {
 810                 return NULL;
 811         }
 812         copied = 0;
 813         for (i=0; i<count; i++) {
 814                 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
 815                 copied += iov[i].iov_len;
 816         }
 817         return buf;
 818 }
 819
 820 static void smb1cli_req_flags(enum protocol_types protocol,
 821                               uint32_t smb1_capabilities,
 822                               uint8_t smb_command,
 823                               uint8_t additional_flags,
 824                               uint8_t clear_flags,
 825                               uint8_t *_flags,
 826                               uint16_t additional_flags2,
 827                               uint16_t clear_flags2,
 828                               uint16_t *_flags2)
 829 {
 830         uint8_t flags = 0;
 831         uint16_t flags2 = 0;
 832
 833         if (protocol >= PROTOCOL_LANMAN1) {
 834                 flags |= FLAG_CASELESS_PATHNAMES;
 835                 flags |= FLAG_CANONICAL_PATHNAMES;
 836         }
 837
 838         if (protocol >= PROTOCOL_LANMAN2) {
 839                 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
 840                 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
 841         }
 842
 843         if (protocol >= PROTOCOL_NT1) {
 844                 flags2 |= FLAGS2_IS_LONG_NAME;
 845
 846                 if (smb1_capabilities & CAP_UNICODE) {
 847                         flags2 |= FLAGS2_UNICODE_STRINGS;
 848                 }
 849                 if (smb1_capabilities & CAP_STATUS32) {
 850                         flags2 |= FLAGS2_32_BIT_ERROR_CODES;
 851                 }
 852                 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
 853                         flags2 |= FLAGS2_EXTENDED_SECURITY;
 854                 }
 855         }
 856
 857         flags |= additional_flags;
 858         flags &= ~clear_flags;
 859         flags2 |= additional_flags2;
 860         flags2 &= ~clear_flags2;
 861
 862         *_flags = flags;
 863         *_flags2 = flags2;
 864 }
 865
 866 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
 867                                       struct tevent_context *ev,
 868                                       struct smbXcli_conn *conn,
 869                                       uint8_t smb_command,
 870                                       uint8_t additional_flags,
 871                                       uint8_t clear_flags,
 872                                       uint16_t additional_flags2,
 873                                       uint16_t clear_flags2,
 874                                       uint32_t timeout_msec,
 875                                       uint32_t pid,
 876                                       uint16_t tid,
 877                                       uint16_t uid,
 878                                       uint8_t wct, uint16_t *vwv,
 879                                       int iov_count,
 880                                       struct iovec *bytes_iov)
 881 {
 882         struct tevent_req *req;
 883         struct smbXcli_req_state *state;
 884         uint8_t flags = 0;
 885         uint16_t flags2 = 0;
 886
 887         if (iov_count > MAX_SMB_IOV) {
 888                 /*
 889                  * Should not happen :-)
 890                  */
 891                 return NULL;
 892         }
 893
 894         req = tevent_req_create(mem_ctx, &state,
 895                                 struct smbXcli_req_state);
 896         if (req == NULL) {
 897                 return NULL;
 898         }
 899         state->ev = ev;
 900         state->conn = conn;
 901
 902         state->smb1.recv_cmd = 0xFF;
 903         state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
 904         state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
 905         if (state->smb1.recv_iov == NULL) {
 906                 TALLOC_FREE(req);
 907                 return NULL;
 908         }
 909
 910         smb1cli_req_flags(conn->protocol,
 911                           conn->smb1.capabilities,
 912                           smb_command,
 913                           additional_flags,
 914                           clear_flags,
 915                           &flags,
 916                           additional_flags2,
 917                           clear_flags2,
 918                           &flags2);
 919
 920         SIVAL(state->smb1.hdr, 0,           SMB_MAGIC);
 921         SCVAL(state->smb1.hdr, HDR_COM,     smb_command);
 922         SIVAL(state->smb1.hdr, HDR_RCLS,    NT_STATUS_V(NT_STATUS_OK));
 923         SCVAL(state->smb1.hdr, HDR_FLG,     flags);
 924         SSVAL(state->smb1.hdr, HDR_FLG2,    flags2);
 925         SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
 926         SSVAL(state->smb1.hdr, HDR_TID,     tid);
 927         SSVAL(state->smb1.hdr, HDR_PID,     pid);
 928         SSVAL(state->smb1.hdr, HDR_UID,     uid);
 929         SSVAL(state->smb1.hdr, HDR_MID,     0); /* this comes later */
 930         SSVAL(state->smb1.hdr, HDR_WCT,     wct);
 931
 932         state->smb1.vwv = vwv;
 933
 934         SSVAL(state->smb1.bytecount_buf, 0, smbXcli_iov_len(bytes_iov, iov_count));
 935
 936         state->smb1.iov[0].iov_base = (void *)state->length_hdr;
 937         state->smb1.iov[0].iov_len  = sizeof(state->length_hdr);
 938         state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
 939         state->smb1.iov[1].iov_len  = sizeof(state->smb1.hdr);
 940         state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
 941         state->smb1.iov[2].iov_len  = wct * sizeof(uint16_t);
 942         state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
 943         state->smb1.iov[3].iov_len  = sizeof(uint16_t);
 944
 945         if (iov_count != 0) {
 946                 memcpy(&state->smb1.iov[4], bytes_iov,
 947                        iov_count * sizeof(*bytes_iov));
 948         }
 949         state->smb1.iov_count = iov_count + 4;
 950
 951         if (timeout_msec > 0) {
 952                 struct timeval endtime;
 953
 954                 endtime = timeval_current_ofs_msec(timeout_msec);
 955                 if (!tevent_req_set_endtime(req, ev, endtime)) {
 956                         return req;
 957                 }
 958         }
 959
 960         switch (smb_command) {
 961         case SMBtranss:
 962         case SMBtranss2:
 963         case SMBnttranss:
 964         case SMBntcancel:
 965                 state->one_way = true;
 966                 break;
 967         case SMBlockingX:
 968                 if ((wct == 8) &&
 969                     (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
 970                         state->one_way = true;
 971                 }
 972                 break;
 973         }
 974
 975         return req;
 976 }
 977
 978 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
 979                                    struct iovec *iov, int iov_count,
 980                                    uint32_t *seqnum)
 981 {
 982         uint8_t *buf;
 983
 984         /*
 985          * Obvious optimization: Make cli_calculate_sign_mac work with struct
 986          * iovec directly. MD5Update would do that just fine.
 987          */
 988
 989         if (iov_count < 4) {
 990                 return NT_STATUS_INVALID_PARAMETER_MIX;
 991         }
 992         if (iov[0].iov_len != NBT_HDR_SIZE) {
 993                 return NT_STATUS_INVALID_PARAMETER_MIX;
 994         }
 995         if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
 996                 return NT_STATUS_INVALID_PARAMETER_MIX;
 997         }
 998         if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
 999                 return NT_STATUS_INVALID_PARAMETER_MIX;
1000         }
1001         if (iov[3].iov_len != sizeof(uint16_t)) {
1002                 return NT_STATUS_INVALID_PARAMETER_MIX;
1003         }
1004
1005         buf = smbXcli_iov_concat(talloc_tos(), iov, iov_count);
1006         if (buf == NULL) {
1007                 return NT_STATUS_NO_MEMORY;
1008         }
1009
1010         *seqnum = smb_signing_next_seqnum(conn->smb1.signing, false);
1011         smb_signing_sign_pdu(conn->smb1.signing, buf, *seqnum);
1012         memcpy(iov[1].iov_base, buf+4, iov[1].iov_len);
1013
1014         TALLOC_FREE(buf);
1015         return NT_STATUS_OK;
1016 }
1017
1018 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1019 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1020                                                TALLOC_CTX *tmp_mem,
1021                                                uint8_t *inbuf);
1022
1023 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1024                                           struct smbXcli_req_state *state,
1025                                           struct iovec *iov, int iov_count)
1026 {
1027         struct tevent_req *subreq;
1028         NTSTATUS status;
1029         uint16_t mid;
1030
1031         if (!smbXcli_conn_is_connected(state->conn)) {
1032                 return NT_STATUS_CONNECTION_DISCONNECTED;
1033         }
1034
1035         if (state->conn->protocol > PROTOCOL_NT1) {
1036                 return NT_STATUS_REVISION_MISMATCH;
1037         }
1038
1039         if (iov_count < 4) {
1040                 return NT_STATUS_INVALID_PARAMETER_MIX;
1041         }
1042         if (iov[0].iov_len != NBT_HDR_SIZE) {
1043                 return NT_STATUS_INVALID_PARAMETER_MIX;
1044         }
1045         if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1046                 return NT_STATUS_INVALID_PARAMETER_MIX;
1047         }
1048         if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1049                 return NT_STATUS_INVALID_PARAMETER_MIX;
1050         }
1051         if (iov[3].iov_len != sizeof(uint16_t)) {
1052                 return NT_STATUS_INVALID_PARAMETER_MIX;
1053         }
1054
1055         if (state->smb1.mid != 0) {
1056                 mid = state->smb1.mid;
1057         } else {
1058                 mid = smb1cli_alloc_mid(state->conn);
1059         }
1060         SSVAL(iov[1].iov_base, HDR_MID, mid);
1061
1062         _smb_setlen_nbt(iov[0].iov_base, smbXcli_iov_len(&iov[1], iov_count-1));
1063
1064         status = smb1cli_conn_signv(state->conn, iov, iov_count,
1065                                     &state->smb1.seqnum);
1066
1067         if (!NT_STATUS_IS_OK(status)) {
1068                 return status;
1069         }
1070
1071         /*
1072          * If we supported multiple encrytion contexts
1073          * here we'd look up based on tid.
1074          */
1075         if (common_encryption_on(state->conn->smb1.trans_enc)) {
1076                 char *buf, *enc_buf;
1077
1078                 buf = (char *)smbXcli_iov_concat(talloc_tos(), iov, iov_count);
1079                 if (buf == NULL) {
1080                         return NT_STATUS_NO_MEMORY;
1081                 }
1082                 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1083                                                (char *)buf, &enc_buf);
1084                 TALLOC_FREE(buf);
1085                 if (!NT_STATUS_IS_OK(status)) {
1086                         DEBUG(0, ("Error in encrypting client message: %s\n",
1087                                   nt_errstr(status)));
1088                         return status;
1089                 }
1090                 buf = (char *)talloc_memdup(state, enc_buf,
1091                                             smb_len_nbt(enc_buf)+4);
1092                 SAFE_FREE(enc_buf);
1093                 if (buf == NULL) {
1094                         return NT_STATUS_NO_MEMORY;
1095                 }
1096                 iov[0].iov_base = (void *)buf;
1097                 iov[0].iov_len = talloc_get_size(buf);
1098                 iov_count = 1;
1099         }
1100
1101         if (state->conn->dispatch_incoming == NULL) {
1102                 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1103         }
1104
1105         subreq = writev_send(state, state->ev, state->conn->outgoing,
1106                              state->conn->fd, false, iov, iov_count);
1107         if (subreq == NULL) {
1108                 return NT_STATUS_NO_MEMORY;
1109         }
1110         tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1111         return NT_STATUS_OK;
1112 }
1113
1114 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1115                                     struct tevent_context *ev,
1116                                     struct smbXcli_conn *conn,
1117                                     uint8_t smb_command,
1118                                     uint8_t additional_flags,
1119                                     uint8_t clear_flags,
1120                                     uint16_t additional_flags2,
1121                                     uint16_t clear_flags2,
1122                                     uint32_t timeout_msec,
1123                                     uint32_t pid,
1124                                     uint16_t tid,
1125                                     uint16_t uid,
1126                                     uint8_t wct, uint16_t *vwv,
1127                                     uint32_t num_bytes,
1128                                     const uint8_t *bytes)
1129 {
1130         struct tevent_req *req;
1131         struct iovec iov;
1132         NTSTATUS status;
1133
1134         iov.iov_base = discard_const_p(void, bytes);
1135         iov.iov_len = num_bytes;
1136
1137         req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1138                                  additional_flags, clear_flags,
1139                                  additional_flags2, clear_flags2,
1140                                  timeout_msec,
1141                                  pid, tid, uid,
1142                                  wct, vwv, 1, &iov);
1143         if (req == NULL) {
1144                 return NULL;
1145         }
1146         if (!tevent_req_is_in_progress(req)) {
1147                 return tevent_req_post(req, ev);
1148         }
1149         status = smb1cli_req_chain_submit(&req, 1);
1150         if (tevent_req_nterror(req, status)) {
1151                 return tevent_req_post(req, ev);
1152         }
1153         return req;
1154 }
1155
1156 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1157 {
1158         struct tevent_req *req =
1159                 tevent_req_callback_data(subreq,
1160                 struct tevent_req);
1161         struct smbXcli_req_state *state =
1162                 tevent_req_data(req,
1163                 struct smbXcli_req_state);
1164         ssize_t nwritten;
1165         int err;
1166
1167         nwritten = writev_recv(subreq, &err);
1168         TALLOC_FREE(subreq);
1169         if (nwritten == -1) {
1170                 NTSTATUS status = map_nt_error_from_unix_common(err);
1171                 smbXcli_conn_disconnect(state->conn, status);
1172                 return;
1173         }
1174
1175         if (state->one_way) {
1176                 state->inbuf = NULL;
1177                 tevent_req_done(req);
1178                 return;
1179         }
1180
1181         if (!smbXcli_req_set_pending(req)) {
1182                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1183                 return;
1184         }
1185 }
1186
1187 static void smbXcli_conn_received(struct tevent_req *subreq)
1188 {
1189         struct smbXcli_conn *conn =
1190                 tevent_req_callback_data(subreq,
1191                 struct smbXcli_conn);
1192         TALLOC_CTX *frame = talloc_stackframe();
1193         NTSTATUS status;
1194         uint8_t *inbuf;
1195         ssize_t received;
1196         int err;
1197
1198         if (subreq != conn->read_smb_req) {
1199                 DEBUG(1, ("Internal error: cli_smb_received called with "
1200                           "unexpected subreq\n"));
1201                 status = NT_STATUS_INTERNAL_ERROR;
1202                 smbXcli_conn_disconnect(conn, status);
1203                 TALLOC_FREE(frame);
1204                 return;
1205         }
1206         conn->read_smb_req = NULL;
1207
1208         received = read_smb_recv(subreq, frame, &inbuf, &err);
1209         TALLOC_FREE(subreq);
1210         if (received == -1) {
1211                 status = map_nt_error_from_unix_common(err);
1212                 smbXcli_conn_disconnect(conn, status);
1213                 TALLOC_FREE(frame);
1214                 return;
1215         }
1216
1217         status = conn->dispatch_incoming(conn, frame, inbuf);
1218         TALLOC_FREE(frame);
1219         if (NT_STATUS_IS_OK(status)) {
1220                 /*
1221                  * We should not do any more processing
1222                  * as the dispatch function called
1223                  * tevent_req_done().
1224                  */
1225                 return;
1226         } else if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1227                 /*
1228                  * We got an error, so notify all pending requests
1229                  */
1230                 smbXcli_conn_disconnect(conn, status);
1231                 return;
1232         }
1233
1234         /*
1235          * We got NT_STATUS_RETRY, so we may ask for a
1236          * next incoming pdu.
1237          */
1238         if (!smbXcli_conn_receive_next(conn)) {
1239                 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1240         }
1241 }
1242
1243 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1244                                           struct iovec **piov, int *pnum_iov)
1245 {
1246         struct iovec *iov;
1247         int num_iov;
1248         size_t buflen;
1249         size_t taken;
1250         size_t remaining;
1251         uint8_t *hdr;
1252         uint8_t cmd;
1253         uint32_t wct_ofs;
1254
1255         buflen = smb_len_nbt(buf);
1256         taken = 0;
1257
1258         hdr = buf + NBT_HDR_SIZE;
1259
1260         if (buflen < MIN_SMB_SIZE) {
1261                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1262         }
1263
1264         /*
1265          * This returns iovec elements in the following order:
1266          *
1267          * - SMB header
1268          *
1269          * - Parameter Block
1270          * - Data Block
1271          *
1272          * - Parameter Block
1273          * - Data Block
1274          *
1275          * - Parameter Block
1276          * - Data Block
1277          */
1278         num_iov = 1;
1279
1280         iov = talloc_array(mem_ctx, struct iovec, num_iov);
1281         if (iov == NULL) {
1282                 return NT_STATUS_NO_MEMORY;
1283         }
1284         iov[0].iov_base = hdr;
1285         iov[0].iov_len = HDR_WCT;
1286         taken += HDR_WCT;
1287
1288         cmd = CVAL(hdr, HDR_COM);
1289         wct_ofs = HDR_WCT;
1290
1291         while (true) {
1292                 size_t len = buflen - taken;
1293                 struct iovec *cur;
1294                 struct iovec *iov_tmp;
1295                 uint8_t wct;
1296                 uint32_t bcc_ofs;
1297                 uint16_t bcc;
1298                 size_t needed;
1299
1300                 /*
1301                  * we need at least WCT and BCC
1302                  */
1303                 needed = sizeof(uint8_t) + sizeof(uint16_t);
1304                 if (len < needed) {
1305                         DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1306                                    __location__, (int)len, (int)needed));
1307                         goto inval;
1308                 }
1309
1310                 /*
1311                  * Now we check if the specified words are there
1312                  */
1313                 wct = CVAL(hdr, wct_ofs);
1314                 needed += wct * sizeof(uint16_t);
1315                 if (len < needed) {
1316                         DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1317                                    __location__, (int)len, (int)needed));
1318                         goto inval;
1319                 }
1320
1321                 /*
1322                  * Now we check if the specified bytes are there
1323                  */
1324                 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
1325                 bcc = SVAL(hdr, bcc_ofs);
1326                 needed += bcc * sizeof(uint8_t);
1327                 if (len < needed) {
1328                         DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1329                                    __location__, (int)len, (int)needed));
1330                         goto inval;
1331                 }
1332
1333                 /*
1334                  * we allocate 2 iovec structures for words and bytes
1335                  */
1336                 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1337                                          num_iov + 2);
1338                 if (iov_tmp == NULL) {
1339                         TALLOC_FREE(iov);
1340                         return NT_STATUS_NO_MEMORY;
1341                 }
1342                 iov = iov_tmp;
1343                 cur = &iov[num_iov];
1344                 num_iov += 2;
1345
1346                 cur[0].iov_len = wct * sizeof(uint16_t);
1347                 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1348                 cur[1].iov_len = bcc * sizeof(uint8_t);
1349                 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
1350
1351                 taken += needed;
1352
1353                 if (!smb1cli_is_andx_req(cmd)) {
1354                         /*
1355                          * If the current command does not have AndX chanining
1356                          * we are done.
1357                          */
1358                         break;
1359                 }
1360
1361                 if (wct == 0 && bcc == 0) {
1362                         /*
1363                          * An empty response also ends the chain,
1364                          * most likely with an error.
1365                          */
1366                         break;
1367                 }
1368
1369                 if (wct < 2) {
1370                         DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
1371                                    __location__, (int)wct, (int)cmd));
1372                         goto inval;
1373                 }
1374                 cmd = CVAL(cur[0].iov_base, 0);
1375                 if (cmd == 0xFF) {
1376                         /*
1377                          * If it is the end of the chain we are also done.
1378                          */
1379                         break;
1380                 }
1381                 wct_ofs = SVAL(cur[0].iov_base, 2);
1382
1383                 if (wct_ofs < taken) {
1384                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
1385                 }
1386                 if (wct_ofs > buflen) {
1387                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
1388                 }
1389
1390                 /*
1391                  * we consumed everything up to the start of the next
1392                  * parameter block.
1393                  */
1394                 taken = wct_ofs;
1395         }
1396
1397         remaining = buflen - taken;
1398
1399         if (remaining > 0 && num_iov >= 3) {
1400                 /*
1401                  * The last DATA block gets the remaining
1402                  * bytes, this is needed to support
1403                  * CAP_LARGE_WRITEX and CAP_LARGE_READX.
1404                  */
1405                 iov[num_iov-1].iov_len += remaining;
1406         }
1407
1408         *piov = iov;
1409         *pnum_iov = num_iov;
1410         return NT_STATUS_OK;
1411
1412 inval:
1413         TALLOC_FREE(iov);
1414         return NT_STATUS_INVALID_NETWORK_RESPONSE;
1415 }
1416
1417 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1418                                                TALLOC_CTX *tmp_mem,
1419                                                uint8_t *inbuf)
1420 {
1421         struct tevent_req *req;
1422         struct smbXcli_req_state *state;
1423         NTSTATUS status;
1424         size_t num_pending;
1425         size_t i;
1426         uint8_t cmd;
1427         uint16_t mid;
1428         bool oplock_break;
1429         const uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
1430         struct iovec *iov = NULL;
1431         int num_iov = 0;
1432         struct tevent_req **chain = NULL;
1433         size_t num_chained = 0;
1434         size_t num_responses = 0;
1435
1436         if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
1437             && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
1438                 DEBUG(10, ("Got non-SMB PDU\n"));
1439                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1440         }
1441
1442         /*
1443          * If we supported multiple encrytion contexts
1444          * here we'd look up based on tid.
1445          */
1446         if (common_encryption_on(conn->smb1.trans_enc)
1447             && (CVAL(inbuf, 0) == 0)) {
1448                 uint16_t enc_ctx_num;
1449
1450                 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
1451                 if (!NT_STATUS_IS_OK(status)) {
1452                         DEBUG(10, ("get_enc_ctx_num returned %s\n",
1453                                    nt_errstr(status)));
1454                         return status;
1455                 }
1456
1457                 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
1458                         DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
1459                                    enc_ctx_num,
1460                                    conn->smb1.trans_enc->enc_ctx_num));
1461                         return NT_STATUS_INVALID_HANDLE;
1462                 }
1463
1464                 status = common_decrypt_buffer(conn->smb1.trans_enc,
1465                                                (char *)inbuf);
1466                 if (!NT_STATUS_IS_OK(status)) {
1467                         DEBUG(10, ("common_decrypt_buffer returned %s\n",
1468                                    nt_errstr(status)));
1469                         return status;
1470                 }
1471         }
1472
1473         mid = SVAL(inhdr, HDR_MID);
1474         num_pending = talloc_array_length(conn->pending);
1475
1476         for (i=0; i<num_pending; i++) {
1477                 if (mid == smb1cli_req_mid(conn->pending[i])) {
1478                         break;
1479                 }
1480         }
1481         if (i == num_pending) {
1482                 /* Dump unexpected reply */
1483                 return NT_STATUS_RETRY;
1484         }
1485
1486         oplock_break = false;
1487
1488         if (mid == 0xffff) {
1489                 /*
1490                  * Paranoia checks that this is really an oplock break request.
1491                  */
1492                 oplock_break = (smb_len_nbt(inbuf) == 51); /* hdr + 8 words */
1493                 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
1494                 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
1495                 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
1496                 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
1497
1498                 if (!oplock_break) {
1499                         /* Dump unexpected reply */
1500                         return NT_STATUS_RETRY;
1501                 }
1502         }
1503
1504         req = conn->pending[i];
1505         state = tevent_req_data(req, struct smbXcli_req_state);
1506
1507         if (!oplock_break /* oplock breaks are not signed */
1508             && !smb_signing_check_pdu(conn->smb1.signing,
1509                                       inbuf, state->smb1.seqnum+1)) {
1510                 DEBUG(10, ("cli_check_sign_mac failed\n"));
1511                 return NT_STATUS_ACCESS_DENIED;
1512         }
1513
1514         status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
1515                                            &iov, &num_iov);
1516         if (!NT_STATUS_IS_OK(status)) {
1517                 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
1518                           nt_errstr(status)));
1519                 return status;
1520         }
1521
1522         cmd = CVAL(inhdr, HDR_COM);
1523         status = smb1cli_pull_raw_error(inhdr);
1524
1525         if (state->smb1.chained_requests == NULL) {
1526                 if (num_iov != 3) {
1527                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
1528                 }
1529
1530                 smbXcli_req_unset_pending(req);
1531
1532                 state->smb1.recv_cmd = cmd;
1533                 state->smb1.recv_status = status;
1534                 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
1535
1536                 state->smb1.recv_iov[0] = iov[0];
1537                 state->smb1.recv_iov[1] = iov[1];
1538                 state->smb1.recv_iov[2] = iov[2];
1539
1540                 if (talloc_array_length(conn->pending) == 0) {
1541                         tevent_req_done(req);
1542                         return NT_STATUS_OK;
1543                 }
1544
1545                 tevent_req_defer_callback(req, state->ev);
1546                 tevent_req_done(req);
1547                 return NT_STATUS_RETRY;
1548         }
1549
1550         chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
1551         num_chained = talloc_array_length(chain);
1552         num_responses = (num_iov - 1)/2;
1553
1554         if (num_responses > num_chained) {
1555                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1556         }
1557
1558         for (i=0; i<num_chained; i++) {
1559                 size_t iov_idx = 1 + (i*2);
1560                 struct iovec *cur = &iov[iov_idx];
1561                 uint8_t *inbuf_ref;
1562
1563                 req = chain[i];
1564                 state = tevent_req_data(req, struct smbXcli_req_state);
1565
1566                 smbXcli_req_unset_pending(req);
1567
1568                 /*
1569                  * as we finish multiple requests here
1570                  * we need to defer the callbacks as
1571                  * they could destroy our current stack state.
1572                  */
1573                 tevent_req_defer_callback(req, state->ev);
1574
1575                 if (i >= num_responses) {
1576                         tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
1577                         continue;
1578                 }
1579
1580                 state->smb1.recv_cmd = cmd;
1581
1582                 if (i == (num_responses - 1)) {
1583                         /*
1584                          * The last request in the chain gets the status
1585                          */
1586                         state->smb1.recv_status = status;
1587                 } else {
1588                         cmd = CVAL(cur[0].iov_base, 0);
1589                         state->smb1.recv_status = NT_STATUS_OK;
1590                 }
1591
1592                 state->inbuf = inbuf;
1593
1594                 /*
1595                  * Note: here we use talloc_reference() in a way
1596                  *       that does not expose it to the caller.
1597                  */
1598                 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
1599                 if (tevent_req_nomem(inbuf_ref, req)) {
1600                         continue;
1601                 }
1602
1603                 /* copy the related buffers */
1604                 state->smb1.recv_iov[0] = iov[0];
1605                 state->smb1.recv_iov[1] = cur[0];
1606                 state->smb1.recv_iov[2] = cur[1];
1607
1608                 tevent_req_done(req);
1609         }
1610
1611         return NT_STATUS_RETRY;
1612 }
1613
1614 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
1615                           TALLOC_CTX *mem_ctx,
1616                           struct iovec **piov,
1617                           uint8_t **phdr,
1618                           uint8_t *pwct,
1619                           uint16_t **pvwv,
1620                           uint32_t *pvwv_offset,
1621                           uint32_t *pnum_bytes,
1622                           uint8_t **pbytes,
1623                           uint32_t *pbytes_offset,
1624                           uint8_t **pinbuf,
1625                           const struct smb1cli_req_expected_response *expected,
1626                           size_t num_expected)
1627 {
1628         struct smbXcli_req_state *state =
1629                 tevent_req_data(req,
1630                 struct smbXcli_req_state);
1631         NTSTATUS status = NT_STATUS_OK;
1632         struct iovec *recv_iov = NULL;
1633         uint8_t *hdr = NULL;
1634         uint8_t wct = 0;
1635         uint32_t vwv_offset = 0;
1636         uint16_t *vwv = NULL;
1637         uint32_t num_bytes = 0;
1638         uint32_t bytes_offset = 0;
1639         uint8_t *bytes = NULL;
1640         size_t i;
1641         bool found_status = false;
1642         bool found_size = false;
1643
1644         if (piov != NULL) {
1645                 *piov = NULL;
1646         }
1647         if (phdr != NULL) {
1648                 *phdr = 0;
1649         }
1650         if (pwct != NULL) {
1651                 *pwct = 0;
1652         }
1653         if (pvwv != NULL) {
1654                 *pvwv = NULL;
1655         }
1656         if (pvwv_offset != NULL) {
1657                 *pvwv_offset = 0;
1658         }
1659         if (pnum_bytes != NULL) {
1660                 *pnum_bytes = 0;
1661         }
1662         if (pbytes != NULL) {
1663                 *pbytes = NULL;
1664         }
1665         if (pbytes_offset != NULL) {
1666                 *pbytes_offset = 0;
1667         }
1668         if (pinbuf != NULL) {
1669                 *pinbuf = NULL;
1670         }
1671
1672         if (state->inbuf != NULL) {
1673                 recv_iov = state->smb1.recv_iov;
1674                 hdr = (uint8_t *)recv_iov[0].iov_base;
1675                 wct = recv_iov[1].iov_len/2;
1676                 vwv = (uint16_t *)recv_iov[1].iov_base;
1677                 vwv_offset = PTR_DIFF(vwv, hdr);
1678                 num_bytes = recv_iov[2].iov_len;
1679                 bytes = (uint8_t *)recv_iov[2].iov_base;
1680                 bytes_offset = PTR_DIFF(bytes, hdr);
1681         }
1682
1683         if (tevent_req_is_nterror(req, &status)) {
1684                 for (i=0; i < num_expected; i++) {
1685                         if (NT_STATUS_EQUAL(status, expected[i].status)) {
1686                                 found_status = true;
1687                                 break;
1688                         }
1689                 }
1690
1691                 if (found_status) {
1692                         return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
1693                 }
1694
1695                 return status;
1696         }
1697
1698         if (num_expected == 0) {
1699                 found_status = true;
1700                 found_size = true;
1701         }
1702
1703         status = state->smb1.recv_status;
1704
1705         for (i=0; i < num_expected; i++) {
1706                 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
1707                         continue;
1708                 }
1709
1710                 found_status = true;
1711                 if (expected[i].wct == 0) {
1712                         found_size = true;
1713                         break;
1714                 }
1715
1716                 if (expected[i].wct == wct) {
1717                         found_size = true;
1718                         break;
1719                 }
1720         }
1721
1722         if (!found_status) {
1723                 return status;
1724         }
1725
1726         if (!found_size) {
1727                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1728         }
1729
1730         if (piov != NULL) {
1731                 *piov = talloc_move(mem_ctx, &recv_iov);
1732         }
1733
1734         if (phdr != NULL) {
1735                 *phdr = hdr;
1736         }
1737         if (pwct != NULL) {
1738                 *pwct = wct;
1739         }
1740         if (pvwv != NULL) {
1741                 *pvwv = vwv;
1742         }
1743         if (pvwv_offset != NULL) {
1744                 *pvwv_offset = vwv_offset;
1745         }
1746         if (pnum_bytes != NULL) {
1747                 *pnum_bytes = num_bytes;
1748         }
1749         if (pbytes != NULL) {
1750                 *pbytes = bytes;
1751         }
1752         if (pbytes_offset != NULL) {
1753                 *pbytes_offset = bytes_offset;
1754         }
1755         if (pinbuf != NULL) {
1756                 *pinbuf = state->inbuf;
1757         }
1758
1759         return status;
1760 }
1761
1762 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
1763 {
1764         size_t wct_ofs;
1765         int i;
1766
1767         wct_ofs = HDR_WCT;
1768
1769         for (i=0; i<num_reqs; i++) {
1770                 struct smbXcli_req_state *state;
1771                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
1772                 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
1773                                            state->smb1.iov_count-2);
1774                 wct_ofs = (wct_ofs + 3) & ~3;
1775         }
1776         return wct_ofs;
1777 }
1778
1779 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
1780 {
1781         struct smbXcli_req_state *first_state =
1782                 tevent_req_data(reqs[0],
1783                 struct smbXcli_req_state);
1784         struct smbXcli_req_state *state;
1785         size_t wct_offset;
1786         size_t chain_padding = 0;
1787         int i, iovlen;
1788         struct iovec *iov = NULL;
1789         struct iovec *this_iov;
1790         NTSTATUS status;
1791         size_t nbt_len;
1792
1793         if (num_reqs == 1) {
1794                 return smb1cli_req_writev_submit(reqs[0], first_state,
1795                                                  first_state->smb1.iov,
1796                                                  first_state->smb1.iov_count);
1797         }
1798
1799         iovlen = 0;
1800         for (i=0; i<num_reqs; i++) {
1801                 if (!tevent_req_is_in_progress(reqs[i])) {
1802                         return NT_STATUS_INTERNAL_ERROR;
1803                 }
1804
1805                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
1806
1807                 if (state->smb1.iov_count < 4) {
1808                         return NT_STATUS_INVALID_PARAMETER_MIX;
1809                 }
1810
1811                 if (i == 0) {
1812                         /*
1813                          * The NBT and SMB header
1814                          */
1815                         iovlen += 2;
1816                 } else {
1817                         /*
1818                          * Chain padding
1819                          */
1820                         iovlen += 1;
1821                 }
1822
1823                 /*
1824                  * words and bytes
1825                  */
1826                 iovlen += state->smb1.iov_count - 2;
1827         }
1828
1829         iov = talloc_zero_array(first_state, struct iovec, iovlen);
1830         if (iov == NULL) {
1831                 return NT_STATUS_NO_MEMORY;
1832         }
1833
1834         first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
1835                 first_state, reqs, sizeof(*reqs) * num_reqs);
1836         if (first_state->smb1.chained_requests == NULL) {
1837                 TALLOC_FREE(iov);
1838                 return NT_STATUS_NO_MEMORY;
1839         }
1840
1841         wct_offset = HDR_WCT;
1842         this_iov = iov;
1843
1844         for (i=0; i<num_reqs; i++) {
1845                 size_t next_padding = 0;
1846                 uint16_t *vwv;
1847
1848                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
1849
1850                 if (i < num_reqs-1) {
1851                         if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
1852                             || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
1853                                 TALLOC_FREE(iov);
1854                                 TALLOC_FREE(first_state->smb1.chained_requests);
1855                                 return NT_STATUS_INVALID_PARAMETER_MIX;
1856                         }
1857                 }
1858
1859                 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
1860                                               state->smb1.iov_count-2) + 1;
1861                 if ((wct_offset % 4) != 0) {
1862                         next_padding = 4 - (wct_offset % 4);
1863                 }
1864                 wct_offset += next_padding;
1865                 vwv = state->smb1.vwv;
1866
1867                 if (i < num_reqs-1) {
1868                         struct smbXcli_req_state *next_state =
1869                                 tevent_req_data(reqs[i+1],
1870                                 struct smbXcli_req_state);
1871                         SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
1872                         SCVAL(vwv+0, 1, 0);
1873                         SSVAL(vwv+1, 0, wct_offset);
1874                 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
1875                         /* properly end the chain */
1876                         SCVAL(vwv+0, 0, 0xff);
1877                         SCVAL(vwv+0, 1, 0xff);
1878                         SSVAL(vwv+1, 0, 0);
1879                 }
1880
1881                 if (i == 0) {
1882                         /*
1883                          * The NBT and SMB header
1884                          */
1885                         this_iov[0] = state->smb1.iov[0];
1886                         this_iov[1] = state->smb1.iov[1];
1887                         this_iov += 2;
1888                 } else {
1889                         /*
1890                          * This one is a bit subtle. We have to add
1891                          * chain_padding bytes between the requests, and we
1892                          * have to also include the wct field of the
1893                          * subsequent requests. We use the subsequent header
1894                          * for the padding, it contains the wct field in its
1895                          * last byte.
1896                          */
1897                         this_iov[0].iov_len = chain_padding+1;
1898                         this_iov[0].iov_base = (void *)&state->smb1.hdr[
1899                                 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
1900                         memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
1901                         this_iov += 1;
1902                 }
1903
1904                 /*
1905                  * copy the words and bytes
1906                  */
1907                 memcpy(this_iov, state->smb1.iov+2,
1908                        sizeof(struct iovec) * (state->smb1.iov_count-2));
1909                 this_iov += state->smb1.iov_count - 2;
1910                 chain_padding = next_padding;
1911         }
1912
1913         nbt_len = smbXcli_iov_len(&iov[1], iovlen-1);
1914         if (nbt_len > first_state->conn->smb1.max_xmit) {
1915                 TALLOC_FREE(iov);
1916                 TALLOC_FREE(first_state->smb1.chained_requests);
1917                 return NT_STATUS_INVALID_PARAMETER_MIX;
1918         }
1919
1920         status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
1921         if (!NT_STATUS_IS_OK(status)) {
1922                 TALLOC_FREE(iov);
1923                 TALLOC_FREE(first_state->smb1.chained_requests);
1924                 return status;
1925         }
1926
1927         return NT_STATUS_OK;
1928 }
1929
1930 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
1931 {
1932         return ((tevent_queue_length(conn->outgoing) != 0)
1933                 || (talloc_array_length(conn->pending) != 0));
1934 }
1935
1936 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
1937 {
1938         return conn->smb2.server.capabilities;
1939 }
1940
1941 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
1942 {
1943         return conn->smb2.server.security_mode;
1944 }
1945
1946 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
1947 {
1948         return conn->smb2.server.max_trans_size;
1949 }
1950
1951 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
1952 {
1953         return conn->smb2.server.max_read_size;
1954 }
1955
1956 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
1957 {
1958         return conn->smb2.server.max_write_size;
1959 }
1960
1961 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
1962                                       struct tevent_context *ev,
1963                                       struct smbXcli_conn *conn,
1964                                       uint16_t cmd,
1965                                       uint32_t additional_flags,
1966                                       uint32_t clear_flags,
1967                                       uint32_t timeout_msec,
1968                                       uint32_t pid,
1969                                       uint32_t tid,
1970                                       uint64_t uid,
1971                                       const uint8_t *fixed,
1972                                       uint16_t fixed_len,
1973                                       const uint8_t *dyn,
1974                                       uint32_t dyn_len)
1975 {
1976         struct tevent_req *req;
1977         struct smbXcli_req_state *state;
1978         uint32_t flags = 0;
1979
1980         req = tevent_req_create(mem_ctx, &state,
1981                                 struct smbXcli_req_state);
1982         if (req == NULL) {
1983                 return NULL;
1984         }
1985
1986         state->ev = ev;
1987         state->conn = conn;
1988
1989         state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
1990         if (state->smb2.recv_iov == NULL) {
1991                 TALLOC_FREE(req);
1992                 return NULL;
1993         }
1994
1995         flags |= additional_flags;
1996         flags &= ~clear_flags;
1997
1998         state->smb2.fixed = fixed;
1999         state->smb2.fixed_len = fixed_len;
2000         state->smb2.dyn = dyn;
2001         state->smb2.dyn_len = dyn_len;
2002
2003         SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID,    SMB2_MAGIC);
2004         SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH,         SMB2_HDR_BODY);
2005         SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE,  1);
2006         SIVAL(state->smb2.hdr, SMB2_HDR_STATUS,         NT_STATUS_V(NT_STATUS_OK));
2007         SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE,         cmd);
2008         SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT,         31);
2009         SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS,          flags);
2010         SIVAL(state->smb2.hdr, SMB2_HDR_PID,            pid);
2011         SIVAL(state->smb2.hdr, SMB2_HDR_TID,            tid);
2012         SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID,     uid);
2013
2014         switch (cmd) {
2015         case SMB2_OP_CANCEL:
2016                 state->one_way = true;
2017                 break;
2018         case SMB2_OP_BREAK:
2019                 /*
2020                  * If this is a dummy request, it will have
2021                  * UINT64_MAX as message id.
2022                  * If we send on break acknowledgement,
2023                  * this gets overwritten later.
2024                  */
2025                 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
2026                 break;
2027         }
2028
2029         if (timeout_msec > 0) {
2030                 struct timeval endtime;
2031
2032                 endtime = timeval_current_ofs_msec(timeout_msec);
2033                 if (!tevent_req_set_endtime(req, ev, endtime)) {
2034                         return req;
2035                 }
2036         }
2037
2038         return req;
2039 }
2040
2041 static void smb2cli_writev_done(struct tevent_req *subreq);
2042 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2043                                                TALLOC_CTX *tmp_mem,
2044                                                uint8_t *inbuf);
2045
2046 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
2047                                      int num_reqs)
2048 {
2049         struct smbXcli_req_state *state;
2050         struct tevent_req *subreq;
2051         struct iovec *iov;
2052         int i, num_iov, nbt_len;
2053
2054         /*
2055          * 1 for the nbt length
2056          * per request: HDR, fixed, dyn, padding
2057          * -1 because the last one does not need padding
2058          */
2059
2060         iov = talloc_array(reqs[0], struct iovec, 1 + 4*num_reqs - 1);
2061         if (iov == NULL) {
2062                 return NT_STATUS_NO_MEMORY;
2063         }
2064
2065         num_iov = 1;
2066         nbt_len = 0;
2067
2068         for (i=0; i<num_reqs; i++) {
2069                 size_t reqlen;
2070                 bool ret;
2071                 uint64_t mid;
2072
2073                 if (!tevent_req_is_in_progress(reqs[i])) {
2074                         return NT_STATUS_INTERNAL_ERROR;
2075                 }
2076
2077                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2078
2079                 if (!smbXcli_conn_is_connected(state->conn)) {
2080                         return NT_STATUS_CONNECTION_DISCONNECTED;
2081                 }
2082
2083                 if ((state->conn->protocol != PROTOCOL_NONE) &&
2084                     (state->conn->protocol < PROTOCOL_SMB2_02)) {
2085                         return NT_STATUS_REVISION_MISMATCH;
2086                 }
2087
2088                 if (state->conn->smb2.mid == UINT64_MAX) {
2089                         return NT_STATUS_CONNECTION_ABORTED;
2090                 }
2091
2092                 mid = state->conn->smb2.mid;
2093                 state->conn->smb2.mid += 1;
2094
2095                 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2096
2097                 iov[num_iov].iov_base = state->smb2.hdr;
2098                 iov[num_iov].iov_len  = sizeof(state->smb2.hdr);
2099                 num_iov += 1;
2100
2101                 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
2102                 iov[num_iov].iov_len  = state->smb2.fixed_len;
2103                 num_iov += 1;
2104
2105                 if (state->smb2.dyn != NULL) {
2106                         iov[num_iov].iov_base = discard_const(state->smb2.dyn);
2107                         iov[num_iov].iov_len  = state->smb2.dyn_len;
2108                         num_iov += 1;
2109                 }
2110
2111                 reqlen  = sizeof(state->smb2.hdr);
2112                 reqlen += state->smb2.fixed_len;
2113                 reqlen += state->smb2.dyn_len;
2114
2115                 if (i < num_reqs-1) {
2116                         if ((reqlen % 8) > 0) {
2117                                 uint8_t pad = 8 - (reqlen % 8);
2118                                 iov[num_iov].iov_base = state->smb2.pad;
2119                                 iov[num_iov].iov_len = pad;
2120                                 num_iov += 1;
2121                                 reqlen += pad;
2122                         }
2123                         SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
2124                 }
2125                 nbt_len += reqlen;
2126
2127                 ret = smbXcli_req_set_pending(reqs[i]);
2128                 if (!ret) {
2129                         return NT_STATUS_NO_MEMORY;
2130                 }
2131         }
2132
2133         /*
2134          * TODO: Do signing here
2135          */
2136
2137         state = tevent_req_data(reqs[0], struct smbXcli_req_state);
2138         _smb_setlen_tcp(state->length_hdr, nbt_len);
2139         iov[0].iov_base = state->length_hdr;
2140         iov[0].iov_len  = sizeof(state->length_hdr);
2141
2142         if (state->conn->dispatch_incoming == NULL) {
2143                 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
2144         }
2145
2146         subreq = writev_send(state, state->ev, state->conn->outgoing,
2147                              state->conn->fd, false, iov, num_iov);
2148         if (subreq == NULL) {
2149                 return NT_STATUS_NO_MEMORY;
2150         }
2151         tevent_req_set_callback(subreq, smb2cli_writev_done, reqs[0]);
2152         return NT_STATUS_OK;
2153 }
2154
2155 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
2156                                     struct tevent_context *ev,
2157                                     struct smbXcli_conn *conn,
2158                                     uint16_t cmd,
2159                                     uint32_t additional_flags,
2160                                     uint32_t clear_flags,
2161                                     uint32_t timeout_msec,
2162                                     uint32_t pid,
2163                                     uint32_t tid,
2164                                     uint64_t uid,
2165                                     const uint8_t *fixed,
2166                                     uint16_t fixed_len,
2167                                     const uint8_t *dyn,
2168                                     uint32_t dyn_len)
2169 {
2170         struct tevent_req *req;
2171         NTSTATUS status;
2172
2173         req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
2174                                  additional_flags, clear_flags,
2175                                  timeout_msec,
2176                                  pid, tid, uid,
2177                                  fixed, fixed_len, dyn, dyn_len);
2178         if (req == NULL) {
2179                 return NULL;
2180         }
2181         if (!tevent_req_is_in_progress(req)) {
2182                 return tevent_req_post(req, ev);
2183         }
2184         status = smb2cli_req_compound_submit(&req, 1);
2185         if (tevent_req_nterror(req, status)) {
2186                 return tevent_req_post(req, ev);
2187         }
2188         return req;
2189 }
2190
2191 static void smb2cli_writev_done(struct tevent_req *subreq)
2192 {
2193         struct tevent_req *req =
2194                 tevent_req_callback_data(subreq,
2195                 struct tevent_req);
2196         struct smbXcli_req_state *state =
2197                 tevent_req_data(req,
2198                 struct smbXcli_req_state);
2199         ssize_t nwritten;
2200         int err;
2201
2202         nwritten = writev_recv(subreq, &err);
2203         TALLOC_FREE(subreq);
2204         if (nwritten == -1) {
2205                 /* here, we need to notify all pending requests */
2206                 NTSTATUS status = map_nt_error_from_unix_common(err);
2207                 smbXcli_conn_disconnect(state->conn, status);
2208                 return;
2209         }
2210 }
2211
2212 static NTSTATUS smb2cli_inbuf_parse_compound(uint8_t *buf, TALLOC_CTX *mem_ctx,
2213                                              struct iovec **piov, int *pnum_iov)
2214 {
2215         struct iovec *iov;
2216         int num_iov;
2217         size_t buflen;
2218         size_t taken;
2219         uint8_t *first_hdr;
2220
2221         num_iov = 0;
2222
2223         iov = talloc_array(mem_ctx, struct iovec, num_iov);
2224         if (iov == NULL) {
2225                 return NT_STATUS_NO_MEMORY;
2226         }
2227
2228         buflen = smb_len_tcp(buf);
2229         taken = 0;
2230         first_hdr = buf + NBT_HDR_SIZE;
2231
2232         while (taken < buflen) {
2233                 size_t len = buflen - taken;
2234                 uint8_t *hdr = first_hdr + taken;
2235                 struct iovec *cur;
2236                 size_t full_size;
2237                 size_t next_command_ofs;
2238                 uint16_t body_size;
2239                 struct iovec *iov_tmp;
2240
2241                 /*
2242                  * We need the header plus the body length field
2243                  */
2244
2245                 if (len < SMB2_HDR_BODY + 2) {
2246                         DEBUG(10, ("%d bytes left, expected at least %d\n",
2247                                    (int)len, SMB2_HDR_BODY));
2248                         goto inval;
2249                 }
2250                 if (IVAL(hdr, 0) != SMB2_MAGIC) {
2251                         DEBUG(10, ("Got non-SMB2 PDU: %x\n",
2252                                    IVAL(hdr, 0)));
2253                         goto inval;
2254                 }
2255                 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
2256                         DEBUG(10, ("Got HDR len %d, expected %d\n",
2257                                    SVAL(hdr, 4), SMB2_HDR_BODY));
2258                         goto inval;
2259                 }
2260
2261                 full_size = len;
2262                 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
2263                 body_size = SVAL(hdr, SMB2_HDR_BODY);
2264
2265                 if (next_command_ofs != 0) {
2266                         if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
2267                                 goto inval;
2268                         }
2269                         if (next_command_ofs > full_size) {
2270                                 goto inval;
2271                         }
2272                         full_size = next_command_ofs;
2273                 }
2274                 if (body_size < 2) {
2275                         goto inval;
2276                 }
2277                 body_size &= 0xfffe;
2278
2279                 if (body_size > (full_size - SMB2_HDR_BODY)) {
2280                         goto inval;
2281                 }
2282
2283                 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
2284                                          num_iov + 3);
2285                 if (iov_tmp == NULL) {
2286                         TALLOC_FREE(iov);
2287                         return NT_STATUS_NO_MEMORY;
2288                 }
2289                 iov = iov_tmp;
2290                 cur = &iov[num_iov];
2291                 num_iov += 3;
2292
2293                 cur[0].iov_base = hdr;
2294                 cur[0].iov_len  = SMB2_HDR_BODY;
2295                 cur[1].iov_base = hdr + SMB2_HDR_BODY;
2296                 cur[1].iov_len  = body_size;
2297                 cur[2].iov_base = hdr + SMB2_HDR_BODY + body_size;
2298                 cur[2].iov_len  = full_size - (SMB2_HDR_BODY + body_size);
2299
2300                 taken += full_size;
2301         }
2302
2303         *piov = iov;
2304         *pnum_iov = num_iov;
2305         return NT_STATUS_OK;
2306
2307 inval:
2308         TALLOC_FREE(iov);
2309         return NT_STATUS_INVALID_NETWORK_RESPONSE;
2310 }
2311
2312 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
2313                                                     uint64_t mid)
2314 {
2315         size_t num_pending = talloc_array_length(conn->pending);
2316         size_t i;
2317
2318         for (i=0; i<num_pending; i++) {
2319                 struct tevent_req *req = conn->pending[i];
2320                 struct smbXcli_req_state *state =
2321                         tevent_req_data(req,
2322                         struct smbXcli_req_state);
2323
2324                 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
2325                         return req;
2326                 }
2327         }
2328         return NULL;
2329 }
2330
2331 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2332                                                TALLOC_CTX *tmp_mem,
2333                                                uint8_t *inbuf)
2334 {
2335         struct tevent_req *req;
2336         struct smbXcli_req_state *state = NULL;
2337         struct iovec *iov;
2338         int i, num_iov;
2339         NTSTATUS status;
2340         bool defer = true;
2341
2342         status = smb2cli_inbuf_parse_compound(inbuf, tmp_mem,
2343                                               &iov, &num_iov);
2344         if (!NT_STATUS_IS_OK(status)) {
2345                 return status;
2346         }
2347
2348         for (i=0; i<num_iov; i+=3) {
2349                 uint8_t *inbuf_ref = NULL;
2350                 struct iovec *cur = &iov[i];
2351                 uint8_t *inhdr = (uint8_t *)cur[0].iov_base;
2352                 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
2353                 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
2354                 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
2355                 uint16_t req_opcode;
2356
2357                 req = smb2cli_conn_find_pending(conn, mid);
2358                 if (req == NULL) {
2359                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
2360                 }
2361                 state = tevent_req_data(req, struct smbXcli_req_state);
2362
2363                 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
2364                 if (opcode != req_opcode) {
2365                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
2366                 }
2367
2368                 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
2369                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
2370                 }
2371
2372                 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
2373                 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
2374                     NT_STATUS_EQUAL(status, STATUS_PENDING)) {
2375                         uint32_t req_flags = IVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
2376                         uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
2377
2378                         req_flags |= SMB2_HDR_FLAG_ASYNC;
2379                         SBVAL(state->smb2.hdr, SMB2_HDR_FLAGS, req_flags);
2380                         SBVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID, async_id);
2381                         continue;
2382                 }
2383
2384                 smbXcli_req_unset_pending(req);
2385
2386                 /*
2387                  * There might be more than one response
2388                  * we need to defer the notifications
2389                  */
2390                 if ((num_iov == 4) && (talloc_array_length(conn->pending) == 0)) {
2391                         defer = false;
2392                 }
2393
2394                 if (defer) {
2395                         tevent_req_defer_callback(req, state->ev);
2396                 }
2397
2398                 /*
2399                  * Note: here we use talloc_reference() in a way
2400                  *       that does not expose it to the caller.
2401                  */
2402                 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
2403                 if (tevent_req_nomem(inbuf_ref, req)) {
2404                         continue;
2405                 }
2406
2407                 /* copy the related buffers */
2408                 state->smb2.recv_iov[0] = cur[0];
2409                 state->smb2.recv_iov[1] = cur[1];
2410                 state->smb2.recv_iov[2] = cur[2];
2411
2412                 tevent_req_done(req);
2413         }
2414
2415         if (defer) {
2416                 return NT_STATUS_RETRY;
2417         }
2418
2419         return NT_STATUS_OK;
2420 }
2421
2422 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
2423                           struct iovec **piov,
2424                           const struct smb2cli_req_expected_response *expected,
2425                           size_t num_expected)
2426 {
2427         struct smbXcli_req_state *state =
2428                 tevent_req_data(req,
2429                 struct smbXcli_req_state);
2430         NTSTATUS status;
2431         size_t body_size;
2432         bool found_status = false;
2433         bool found_size = false;
2434         size_t i;
2435
2436         if (piov != NULL) {
2437                 *piov = NULL;
2438         }
2439
2440         if (tevent_req_is_nterror(req, &status)) {
2441                 for (i=0; i < num_expected; i++) {
2442                         if (NT_STATUS_EQUAL(status, expected[i].status)) {
2443                                 found_status = true;
2444                                 break;
2445                         }
2446                 }
2447
2448                 if (found_status) {
2449                         return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2450                 }
2451
2452                 return status;
2453         }
2454
2455         if (num_expected == 0) {
2456                 found_status = true;
2457                 found_size = true;
2458         }
2459
2460         status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
2461         body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
2462
2463         for (i=0; i < num_expected; i++) {
2464                 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2465                         continue;
2466                 }
2467
2468                 found_status = true;
2469                 if (expected[i].body_size == 0) {
2470                         found_size = true;
2471                         break;
2472                 }
2473
2474                 if (expected[i].body_size == body_size) {
2475                         found_size = true;
2476                         break;
2477                 }
2478         }
2479
2480         if (!found_status) {
2481                 return status;
2482         }
2483
2484         if (!found_size) {
2485                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2486         }
2487
2488         if (piov != NULL) {
2489                 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
2490         }
2491
2492         return status;
2493 }
2494
2495 static const struct {
2496         enum protocol_types proto;
2497         const char *smb1_name;
2498 } smb1cli_prots[] = {
2499         {PROTOCOL_CORE,         "PC NETWORK PROGRAM 1.0"},
2500         {PROTOCOL_COREPLUS,     "MICROSOFT NETWORKS 1.03"},
2501         {PROTOCOL_LANMAN1,      "MICROSOFT NETWORKS 3.0"},
2502         {PROTOCOL_LANMAN1,      "LANMAN1.0"},
2503         {PROTOCOL_LANMAN2,      "LM1.2X002"},
2504         {PROTOCOL_LANMAN2,      "DOS LANMAN2.1"},
2505         {PROTOCOL_LANMAN2,      "LANMAN2.1"},
2506         {PROTOCOL_LANMAN2,      "Samba"},
2507         {PROTOCOL_NT1,          "NT LANMAN 1.0"},
2508         {PROTOCOL_NT1,          "NT LM 0.12"},
2509         {PROTOCOL_SMB2_02,      "SMB 2.002"},
2510 };
2511
2512 static const struct {
2513         enum protocol_types proto;
2514         uint16_t smb2_dialect;
2515 } smb2cli_prots[] = {
2516         {PROTOCOL_SMB2_02,      SMB2_DIALECT_REVISION_202},
2517 };
2518
2519 struct smbXcli_negprot_state {
2520         struct smbXcli_conn *conn;
2521         struct tevent_context *ev;
2522         uint32_t timeout_msec;
2523         enum protocol_types min_protocol;
2524         enum protocol_types max_protocol;
2525
2526         struct {
2527                 uint8_t fixed[36];
2528                 uint8_t dyn[ARRAY_SIZE(smb2cli_prots)*2];
2529         } smb2;
2530 };
2531
2532 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
2533 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
2534 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
2535 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
2536 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
2537 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
2538                                                   TALLOC_CTX *frame,
2539                                                   uint8_t *inbuf);
2540
2541 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
2542                                         struct tevent_context *ev,
2543                                         struct smbXcli_conn *conn,
2544                                         uint32_t timeout_msec,
2545                                         enum protocol_types min_protocol,
2546                                         enum protocol_types max_protocol)
2547 {
2548         struct tevent_req *req, *subreq;
2549         struct smbXcli_negprot_state *state;
2550
2551         req = tevent_req_create(mem_ctx, &state,
2552                                 struct smbXcli_negprot_state);
2553         if (req == NULL) {
2554                 return NULL;
2555         }
2556         state->conn = conn;
2557         state->ev = ev;
2558         state->timeout_msec = timeout_msec;
2559         state->min_protocol = min_protocol;
2560         state->max_protocol = max_protocol;
2561
2562         if (min_protocol == PROTOCOL_NONE) {
2563                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
2564                 return tevent_req_post(req, ev);
2565         }
2566
2567         if (max_protocol == PROTOCOL_NONE) {
2568                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
2569                 return tevent_req_post(req, ev);
2570         }
2571
2572         if (min_protocol > max_protocol) {
2573                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
2574                 return tevent_req_post(req, ev);
2575         }
2576
2577         if ((min_protocol < PROTOCOL_SMB2_02) &&
2578             (max_protocol < PROTOCOL_SMB2_02)) {
2579                 /*
2580                  * SMB1 only...
2581                  */
2582                 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
2583
2584                 subreq = smbXcli_negprot_smb1_subreq(state);
2585                 if (tevent_req_nomem(subreq, req)) {
2586                         return tevent_req_post(req, ev);
2587                 }
2588                 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
2589                 return req;
2590         }
2591
2592         if ((min_protocol >= PROTOCOL_SMB2_02) &&
2593             (max_protocol >= PROTOCOL_SMB2_02)) {
2594                 /*
2595                  * SMB2 only...
2596                  */
2597                 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
2598
2599                 subreq = smbXcli_negprot_smb2_subreq(state);
2600                 if (tevent_req_nomem(subreq, req)) {
2601                         return tevent_req_post(req, ev);
2602                 }
2603                 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
2604                 return req;
2605         }
2606
2607         /*
2608          * We send an SMB1 negprot with the SMB2 dialects
2609          * and expect a SMB1 or a SMB2 response.
2610          *
2611          * smbXcli_negprot_dispatch_incoming() will fix the
2612          * callback to match protocol of the response.
2613          */
2614         conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
2615
2616         subreq = smbXcli_negprot_smb1_subreq(state);
2617         if (tevent_req_nomem(subreq, req)) {
2618                 return tevent_req_post(req, ev);
2619         }
2620         tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
2621         return req;
2622 }
2623
2624 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
2625 {
2626         struct tevent_req *req =
2627                 tevent_req_callback_data(subreq,
2628                 struct tevent_req);
2629         NTSTATUS status;
2630
2631         /*
2632          * we just want the low level error
2633          */
2634         status = tevent_req_simple_recv_ntstatus(subreq);
2635         TALLOC_FREE(subreq);
2636         if (tevent_req_nterror(req, status)) {
2637                 return;
2638         }
2639
2640         /* this should never happen */
2641         tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
2642 }
2643
2644 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
2645 {
2646         size_t i;
2647         DATA_BLOB bytes = data_blob_null;
2648         uint8_t flags;
2649         uint16_t flags2;
2650
2651         /* setup the protocol strings */
2652         for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
2653                 uint8_t c = 2;
2654                 bool ok;
2655
2656                 if (smb1cli_prots[i].proto < state->min_protocol) {
2657                         continue;
2658                 }
2659
2660                 if (smb1cli_prots[i].proto > state->max_protocol) {
2661                         continue;
2662                 }
2663
2664                 ok = data_blob_append(state, &bytes, &c, sizeof(c));
2665                 if (!ok) {
2666                         return NULL;
2667                 }
2668
2669                 /*
2670                  * We now it is already ascii and
2671                  * we want NULL termination.
2672                  */
2673                 ok = data_blob_append(state, &bytes,
2674                                       smb1cli_prots[i].smb1_name,
2675                                       strlen(smb1cli_prots[i].smb1_name)+1);
2676                 if (!ok) {
2677                         return NULL;
2678                 }
2679         }
2680
2681         smb1cli_req_flags(state->max_protocol,
2682                           state->conn->smb1.client.capabilities,
2683                           SMBnegprot,
2684                           0, 0, &flags,
2685                           0, 0, &flags2);
2686
2687         return smb1cli_req_send(state, state->ev, state->conn,
2688                                 SMBnegprot,
2689                                 flags, ~flags,
2690                                 flags2, ~flags2,
2691                                 state->timeout_msec,
2692                                 0xFFFE, 0, 0, /* pid, tid, uid */
2693                                 0, NULL, /* wct, vwv */
2694                                 bytes.length, bytes.data);
2695 }
2696
2697 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
2698 {
2699         struct tevent_req *req =
2700                 tevent_req_callback_data(subreq,
2701                 struct tevent_req);
2702         struct smbXcli_negprot_state *state =
2703                 tevent_req_data(req,
2704                 struct smbXcli_negprot_state);
2705         struct smbXcli_conn *conn = state->conn;
2706         struct iovec *recv_iov = NULL;
2707         uint8_t *inhdr;
2708         uint8_t wct;
2709         uint16_t *vwv;
2710         uint32_t num_bytes;
2711         uint8_t *bytes;
2712         NTSTATUS status;
2713         uint16_t protnum;
2714         size_t i;
2715         size_t num_prots = 0;
2716         uint8_t flags;
2717         uint32_t client_capabilities = conn->smb1.client.capabilities;
2718         uint32_t both_capabilities;
2719         uint32_t server_capabilities = 0;
2720         uint32_t capabilities;
2721         uint32_t client_max_xmit = conn->smb1.client.max_xmit;
2722         uint32_t server_max_xmit = 0;
2723         uint32_t max_xmit;
2724         uint32_t server_max_mux = 0;
2725         uint16_t server_security_mode = 0;
2726         uint32_t server_session_key = 0;
2727         bool server_readbraw = false;
2728         bool server_writebraw = false;
2729         bool server_lockread = false;
2730         bool server_writeunlock = false;
2731         struct GUID server_guid = GUID_zero();
2732         DATA_BLOB server_gss_blob = data_blob_null;
2733         uint8_t server_challenge[8];
2734         char *server_workgroup = NULL;
2735         char *server_name = NULL;
2736         int server_time_zone = 0;
2737         NTTIME server_system_time = 0;
2738         static const struct smb1cli_req_expected_response expected[] = {
2739         {
2740                 .status = NT_STATUS_OK,
2741                 .wct = 0x11, /* NT1 */
2742         },
2743         {
2744                 .status = NT_STATUS_OK,
2745                 .wct = 0x0D, /* LM */
2746         },
2747         {
2748                 .status = NT_STATUS_OK,
2749                 .wct = 0x01, /* CORE */
2750         }
2751         };
2752
2753         ZERO_STRUCT(server_challenge);
2754
2755         status = smb1cli_req_recv(subreq, state,
2756                                   &recv_iov,
2757                                   &inhdr,
2758                                   &wct,
2759                                   &vwv,
2760                                   NULL, /* pvwv_offset */
2761                                   &num_bytes,
2762                                   &bytes,
2763                                   NULL, /* pbytes_offset */
2764                                   NULL, /* pinbuf */
2765                                   expected, ARRAY_SIZE(expected));
2766         TALLOC_FREE(subreq);
2767         if (tevent_req_nterror(req, status)) {
2768                 return;
2769         }
2770
2771         flags = CVAL(inhdr, HDR_FLG);
2772
2773         protnum = SVAL(vwv, 0);
2774
2775         for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
2776                 if (smb1cli_prots[i].proto < state->min_protocol) {
2777                         continue;
2778                 }
2779
2780                 if (smb1cli_prots[i].proto > state->max_protocol) {
2781                         continue;
2782                 }
2783
2784                 if (protnum != num_prots) {
2785                         num_prots++;
2786                         continue;
2787                 }
2788
2789                 conn->protocol = smb1cli_prots[i].proto;
2790                 break;
2791         }
2792
2793         if (conn->protocol == PROTOCOL_NONE) {
2794                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
2795                 return;
2796         }
2797
2798         if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
2799                 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
2800                          "and the selected protocol level doesn't support it.\n"));
2801                 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
2802                 return;
2803         }
2804
2805         if (flags & FLAG_SUPPORT_LOCKREAD) {
2806                 server_lockread = true;
2807                 server_writeunlock = true;
2808         }
2809
2810         if (conn->protocol >= PROTOCOL_NT1) {
2811                 const char *client_signing = NULL;
2812                 bool server_mandatory = false;
2813                 bool server_allowed = false;
2814                 const char *server_signing = NULL;
2815                 bool ok;
2816                 uint8_t key_len;
2817
2818                 if (wct != 0x11) {
2819                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
2820                         return;
2821                 }
2822
2823                 /* NT protocol */
2824                 server_security_mode = CVAL(vwv + 1, 0);
2825                 server_max_mux = SVAL(vwv + 1, 1);
2826                 server_max_xmit = IVAL(vwv + 3, 1);
2827                 server_session_key = IVAL(vwv + 7, 1);
2828                 server_time_zone = SVALS(vwv + 15, 1);
2829                 server_time_zone *= 60;
2830                 /* this time arrives in real GMT */
2831                 server_system_time = BVAL(vwv + 11, 1);
2832                 server_capabilities = IVAL(vwv + 9, 1);
2833
2834                 key_len = CVAL(vwv + 16, 1);
2835
2836                 if (server_capabilities & CAP_RAW_MODE) {
2837                         server_readbraw = true;
2838                         server_writebraw = true;
2839                 }
2840                 if (server_capabilities & CAP_LOCK_AND_READ) {
2841                         server_lockread = true;
2842                 }
2843
2844                 if (server_capabilities & CAP_EXTENDED_SECURITY) {
2845                         DATA_BLOB blob1, blob2;
2846
2847                         if (num_bytes < 16) {
2848                                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
2849                                 return;
2850                         }
2851
2852                         blob1 = data_blob_const(bytes, 16);
2853                         status = GUID_from_data_blob(&blob1, &server_guid);
2854                         if (tevent_req_nterror(req, status)) {
2855                                 return;
2856                         }
2857
2858                         blob1 = data_blob_const(bytes+16, num_bytes-16);
2859                         blob2 = data_blob_dup_talloc(state, blob1);
2860                         if (blob1.length > 0 &&
2861                             tevent_req_nomem(blob2.data, req)) {
2862                                 return;
2863                         }
2864                         server_gss_blob = blob2;
2865                 } else {
2866                         DATA_BLOB blob1, blob2;
2867
2868                         if (num_bytes < key_len) {
2869                                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
2870                                 return;
2871                         }
2872
2873                         if (key_len != 0 && key_len != 8) {
2874                                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
2875                                 return;
2876                         }
2877
2878                         if (key_len == 8) {
2879                                 memcpy(server_challenge, bytes, 8);
2880                         }
2881
2882                         blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
2883                         blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
2884                         if (blob1.length > 0) {
2885                                 size_t len;
2886
2887                                 len = utf16_len_n(blob1.data,
2888                                                   blob1.length);
2889                                 blob1.length = len;
2890
2891                                 ok = convert_string_talloc(state,
2892                                                            CH_UTF16LE,
2893                                                            CH_UNIX,
2894                                                            blob1.data,
2895                                                            blob1.length,
2896                                                            &server_workgroup,
2897                                                            &len);
2898                                 if (!ok) {
2899                                         status = map_nt_error_from_unix_common(errno);
2900                                         tevent_req_nterror(req, status);
2901                                         return;
2902                                 }
2903                         }
2904
2905                         blob2.data += blob1.length;
2906                         blob2.length -= blob1.length;
2907                         if (blob2.length > 0) {
2908                                 size_t len;
2909
2910                                 len = utf16_len_n(blob1.data,
2911                                                   blob1.length);
2912                                 blob1.length = len;
2913
2914                                 ok = convert_string_talloc(state,
2915                                                            CH_UTF16LE,
2916                                                            CH_UNIX,
2917                                                            blob2.data,
2918                                                            blob2.length,
2919                                                            &server_name,
2920                                                            &len);
2921                                 if (!ok) {
2922                                         status = map_nt_error_from_unix_common(errno);
2923                                         tevent_req_nterror(req, status);
2924                                         return;
2925                                 }
2926                         }
2927                 }
2928
2929                 client_signing = "disabled";
2930                 if (conn->allow_signing) {
2931                         client_signing = "allowed";
2932                 }
2933                 if (conn->mandatory_signing) {
2934                         client_signing = "required";
2935                 }
2936
2937                 server_signing = "not supported";
2938                 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
2939                         server_signing = "supported";
2940                         server_allowed = true;
2941                 }
2942                 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
2943                         server_signing = "required";
2944                         server_mandatory = true;
2945                 }
2946
2947                 ok = smb_signing_set_negotiated(conn->smb1.signing,
2948                                                 server_allowed,
2949                                                 server_mandatory);
2950                 if (!ok) {
2951                         DEBUG(1,("cli_negprot: SMB signing is required, "
2952                                  "but client[%s] and server[%s] mismatch\n",
2953                                  client_signing, server_signing));
2954                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
2955                         return;
2956                 }
2957
2958         } else if (conn->protocol >= PROTOCOL_LANMAN1) {
2959                 DATA_BLOB blob1;
2960                 uint8_t key_len;
2961                 time_t t;
2962
2963                 if (wct != 0x0D) {
2964                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
2965                         return;
2966                 }
2967
2968                 server_security_mode = SVAL(vwv + 1, 0);
2969                 server_max_xmit = SVAL(vwv + 2, 0);
2970                 server_max_mux = SVAL(vwv + 3, 0);
2971                 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
2972                 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
2973                 server_session_key = IVAL(vwv + 6, 0);
2974                 server_time_zone = SVALS(vwv + 10, 0);
2975                 server_time_zone *= 60;
2976                 /* this time is converted to GMT by make_unix_date */
2977                 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
2978                 unix_to_nt_time(&server_system_time, t);
2979                 key_len = SVAL(vwv + 11, 0);
2980
2981                 if (num_bytes < key_len) {
2982                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
2983                         return;
2984                 }
2985
2986                 if (key_len != 0 && key_len != 8) {
2987                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
2988                         return;
2989                 }
2990
2991                 if (key_len == 8) {
2992                         memcpy(server_challenge, bytes, 8);
2993                 }
2994
2995                 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
2996                 if (blob1.length > 0) {
2997                         size_t len;
2998                         bool ok;
2999
3000                         len = utf16_len_n(blob1.data,
3001                                           blob1.length);
3002                         blob1.length = len;
3003
3004                         ok = convert_string_talloc(state,
3005                                                    CH_DOS,
3006                                                    CH_UNIX,
3007                                                    blob1.data,
3008                                                    blob1.length,
3009                                                    &server_workgroup,
3010                                                    &len);
3011                         if (!ok) {
3012                                 status = map_nt_error_from_unix_common(errno);
3013                                 tevent_req_nterror(req, status);
3014                                 return;
3015                         }
3016                 }
3017
3018         } else {
3019                 /* the old core protocol */
3020                 server_time_zone = get_time_zone(time(NULL));
3021                 server_max_xmit = 1024;
3022                 server_max_mux = 1;
3023         }
3024
3025         if (server_max_xmit < 1024) {
3026                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3027                 return;
3028         }
3029
3030         if (server_max_mux < 1) {
3031                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3032                 return;
3033         }
3034
3035         /*
3036          * Now calculate the negotiated capabilities
3037          * based on the mask for:
3038          * - client only flags
3039          * - flags used in both directions
3040          * - server only flags
3041          */
3042         both_capabilities = client_capabilities & server_capabilities;
3043         capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
3044         capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
3045         capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
3046
3047         max_xmit = MIN(client_max_xmit, server_max_xmit);
3048
3049         conn->smb1.server.capabilities = server_capabilities;
3050         conn->smb1.capabilities = capabilities;
3051
3052         conn->smb1.server.max_xmit = server_max_xmit;
3053         conn->smb1.max_xmit = max_xmit;
3054
3055         conn->smb1.server.max_mux = server_max_mux;
3056
3057         conn->smb1.server.security_mode = server_security_mode;
3058
3059         conn->smb1.server.readbraw = server_readbraw;
3060         conn->smb1.server.writebraw = server_writebraw;
3061         conn->smb1.server.lockread = server_lockread;
3062         conn->smb1.server.writeunlock = server_writeunlock;
3063
3064         conn->smb1.server.session_key = server_session_key;
3065
3066         talloc_steal(conn, server_gss_blob.data);
3067         conn->smb1.server.gss_blob = server_gss_blob;
3068         conn->smb1.server.guid = server_guid;
3069         memcpy(conn->smb1.server.challenge, server_challenge, 8);
3070         conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
3071         conn->smb1.server.name = talloc_move(conn, &server_name);
3072
3073         conn->smb1.server.time_zone = server_time_zone;
3074         conn->smb1.server.system_time = server_system_time;
3075
3076         tevent_req_done(req);
3077 }
3078
3079 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
3080 {
3081         size_t i;
3082         uint8_t *buf;
3083         uint16_t dialect_count = 0;
3084
3085         buf = state->smb2.dyn;
3086         for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
3087                 if (smb2cli_prots[i].proto < state->min_protocol) {
3088                         continue;
3089                 }
3090
3091                 if (smb2cli_prots[i].proto > state->max_protocol) {
3092                         continue;
3093                 }
3094
3095                 SSVAL(buf, dialect_count*2, smb2cli_prots[i].smb2_dialect);
3096                 dialect_count++;
3097         }
3098
3099         buf = state->smb2.fixed;
3100         SSVAL(buf, 0, 36);
3101         SSVAL(buf, 2, dialect_count);
3102         SSVAL(buf, 4, state->conn->smb2.client.security_mode);
3103         SSVAL(buf, 6, 0);       /* Reserved */
3104         SSVAL(buf, 8, 0);       /* Capabilities */
3105         memset(buf+12, 0, 16);  /* ClientGuid */
3106         SBVAL(buf, 28, 0);      /* ClientStartTime */
3107
3108         return smb2cli_req_send(state, state->ev,
3109                                 state->conn, SMB2_OP_NEGPROT,
3110                                 0, 0, /* flags */
3111                                 state->timeout_msec,
3112                                 0xFEFF, 0, 0, /* pid, tid, uid */
3113                                 state->smb2.fixed, sizeof(state->smb2.fixed),
3114                                 state->smb2.dyn, dialect_count*2);
3115 }
3116
3117 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
3118 {
3119         struct tevent_req *req =
3120                 tevent_req_callback_data(subreq,
3121                 struct tevent_req);
3122         struct smbXcli_negprot_state *state =
3123                 tevent_req_data(req,
3124                 struct smbXcli_negprot_state);
3125         struct smbXcli_conn *conn = state->conn;
3126         size_t security_offset, security_length;
3127         DATA_BLOB blob;
3128         NTSTATUS status;
3129         struct iovec *iov;
3130         uint8_t *body;
3131         size_t i;
3132         uint16_t dialect_revision;
3133         static const struct smb2cli_req_expected_response expected[] = {
3134         {
3135                 .status = NT_STATUS_OK,
3136                 .body_size = 0x41
3137         }
3138         };
3139
3140         status = smb2cli_req_recv(subreq, state, &iov,
3141                                   expected, ARRAY_SIZE(expected));
3142         TALLOC_FREE(subreq);
3143         if (tevent_req_nterror(req, status)) {
3144                 return;
3145         }
3146
3147         body = (uint8_t *)iov[1].iov_base;
3148
3149         dialect_revision = SVAL(body, 4);
3150
3151         for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
3152                 if (smb2cli_prots[i].proto < state->min_protocol) {
3153                         continue;
3154                 }
3155
3156                 if (smb2cli_prots[i].proto > state->max_protocol) {
3157                         continue;
3158                 }
3159
3160                 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
3161                         continue;
3162                 }
3163
3164                 conn->protocol = smb2cli_prots[i].proto;
3165                 break;
3166         }
3167
3168         if (conn->protocol == PROTOCOL_NONE) {
3169                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3170                 return;
3171         }
3172
3173         conn->smb2.server.security_mode = SVAL(body, 2);
3174
3175         blob = data_blob_const(body + 8, 16);
3176         status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
3177         if (tevent_req_nterror(req, status)) {
3178                 return;
3179         }
3180
3181         conn->smb2.server.capabilities  = IVAL(body, 24);
3182         conn->smb2.server.max_trans_size= IVAL(body, 28);
3183         conn->smb2.server.max_read_size = IVAL(body, 32);
3184         conn->smb2.server.max_write_size= IVAL(body, 36);
3185         conn->smb2.server.system_time   = BVAL(body, 40);
3186         conn->smb2.server.start_time    = BVAL(body, 48);
3187
3188         security_offset = SVAL(body, 56);
3189         security_length = SVAL(body, 58);
3190
3191         if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
3192                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3193                 return;
3194         }
3195
3196         if (security_length > iov[2].iov_len) {
3197                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3198                 return;
3199         }
3200
3201         conn->smb2.server.gss_blob = data_blob_talloc(conn,
3202                                                 iov[2].iov_base,
3203                                                 security_length);
3204         if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
3205                 return;
3206         }
3207
3208         tevent_req_done(req);
3209 }
3210
3211 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
3212                                                   TALLOC_CTX *tmp_mem,
3213                                                   uint8_t *inbuf)
3214 {
3215         size_t num_pending = talloc_array_length(conn->pending);
3216         struct tevent_req *subreq;
3217         struct smbXcli_req_state *substate;
3218         struct tevent_req *req;
3219         struct smbXcli_negprot_state *state;
3220         uint32_t protocol_magic = IVAL(inbuf, 4);
3221
3222         if (num_pending != 1) {
3223                 return NT_STATUS_INTERNAL_ERROR;
3224         }
3225
3226         subreq = conn->pending[0];
3227         substate = tevent_req_data(subreq, struct smbXcli_req_state);
3228         req = tevent_req_callback_data(subreq, struct tevent_req);
3229         state = tevent_req_data(req, struct smbXcli_negprot_state);
3230
3231         switch (protocol_magic) {
3232         case SMB_MAGIC:
3233                 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
3234                 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
3235                 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
3236
3237         case SMB2_MAGIC:
3238                 if (substate->smb2.recv_iov == NULL) {
3239                         /*
3240                          * For the SMB1 negprot we have move it.
3241                          */
3242                         substate->smb2.recv_iov = substate->smb1.recv_iov;
3243                         substate->smb1.recv_iov = NULL;
3244                 }
3245
3246                 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
3247                 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3248                 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
3249         }
3250
3251         DEBUG(10, ("Got non-SMB PDU\n"));
3252         return NT_STATUS_INVALID_NETWORK_RESPONSE;
3253 }
3254
3255 NTSTATUS smbXcli_negprot_recv(struct tevent_req *req)
3256 {
3257         return tevent_req_simple_recv_ntstatus(req);
3258 }
3259
3260 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
3261                          uint32_t timeout_msec,
3262                          enum protocol_types min_protocol,
3263                          enum protocol_types max_protocol)
3264 {
3265         TALLOC_CTX *frame = talloc_stackframe();
3266         struct tevent_context *ev;
3267         struct tevent_req *req;
3268         NTSTATUS status = NT_STATUS_NO_MEMORY;
3269         bool ok;
3270
3271         if (smbXcli_conn_has_async_calls(conn)) {
3272                 /*
3273                  * Can't use sync call while an async call is in flight
3274                  */
3275                 status = NT_STATUS_INVALID_PARAMETER_MIX;
3276                 goto fail;
3277         }
3278         ev = tevent_context_init(frame);
3279         if (ev == NULL) {
3280                 goto fail;
3281         }
3282         req = smbXcli_negprot_send(frame, ev, conn, timeout_msec,
3283                                    min_protocol, max_protocol);
3284         if (req == NULL) {
3285                 goto fail;
3286         }
3287         ok = tevent_req_poll(req, ev);
3288         if (!ok) {
3289                 status = map_nt_error_from_unix_common(errno);
3290                 goto fail;
3291         }
3292         status = smbXcli_negprot_recv(req);
3293  fail:
3294         TALLOC_FREE(frame);
3295         return status;
3296 }