source3/smbd/smb2_server.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   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 "smbd/globals.h"
  23 #include "../source4/libcli/smb2/smb2_constants.h"
  24 #include "../lib/tsocket/tsocket.h"
  25
  26 bool smbd_is_smb2_header(const uint8_t *inbuf, size_t size)
  27 {
  28         if (size < (4 + SMB2_HDR_BODY)) {
  29                 return false;
  30         }
  31
  32         if (IVAL(inbuf, 4) != SMB2_MAGIC) {
  33                 return false;
  34         }
  35
  36         return true;
  37 }
  38
  39 static NTSTATUS smbd_initialize_smb2(struct smbd_server_connection *conn)
  40 {
  41         NTSTATUS status;
  42         int ret;
  43
  44         TALLOC_FREE(conn->smb1.fde);
  45
  46         conn->smb2.event_ctx = smbd_event_context();
  47
  48         conn->smb2.recv_queue = tevent_queue_create(conn, "smb2 recv queue");
  49         if (conn->smb2.recv_queue == NULL) {
  50                 return NT_STATUS_NO_MEMORY;
  51         }
  52
  53         conn->smb2.send_queue = tevent_queue_create(conn, "smb2 send queue");
  54         if (conn->smb2.send_queue == NULL) {
  55                 return NT_STATUS_NO_MEMORY;
  56         }
  57
  58         conn->smb2.sessions.idtree = idr_init(conn);
  59         if (conn->smb2.sessions.idtree == NULL) {
  60                 return NT_STATUS_NO_MEMORY;
  61         }
  62         conn->smb2.sessions.limit = 0x0000FFFE;
  63         conn->smb2.sessions.list = NULL;
  64
  65         ret = tstream_bsd_existing_socket(conn, smbd_server_fd(),
  66                                           &conn->smb2.stream);
  67         if (ret == -1) {
  68                 status = map_nt_error_from_unix(errno);
  69                 return status;
  70         }
  71
  72         /* Ensure child is set to non-blocking mode */
  73         set_blocking(smbd_server_fd(),false);
  74         return NT_STATUS_OK;
  75 }
  76
  77 #define smb2_len(buf) (PVAL(buf,3)|(PVAL(buf,2)<<8)|(PVAL(buf,1)<<16))
  78 #define _smb2_setlen(_buf,len) do { \
  79         uint8_t *buf = (uint8_t *)_buf; \
  80         buf[0] = 0; \
  81         buf[1] = ((len)&0xFF0000)>>16; \
  82         buf[2] = ((len)&0xFF00)>>8; \
  83         buf[3] = (len)&0xFF; \
  84 } while (0)
  85
  86 static void smb2_setup_nbt_length(struct iovec *vector, int count)
  87 {
  88         size_t len = 0;
  89         int i;
  90
  91         for (i=1; i < count; i++) {
  92                 len += vector[i].iov_len;
  93         }
  94
  95         _smb2_setlen(vector[0].iov_base, len);
  96 }
  97
  98 static int smbd_smb2_request_parent_destructor(struct smbd_smb2_request **req)
  99 {
 100         if (*req) {
 101                 (*req)->parent = NULL;
 102                 (*req)->mem_pool = NULL;
 103         }
 104
 105         return 0;
 106 }
 107
 108 static int smbd_smb2_request_destructor(struct smbd_smb2_request *req)
 109 {
 110         if (req->out.vector) {
 111                 DLIST_REMOVE(req->conn->smb2.requests, req);
 112         }
 113
 114         if (req->parent) {
 115                 *req->parent = NULL;
 116                 talloc_free(req->mem_pool);
 117         }
 118
 119         return 0;
 120 }
 121
 122 static struct smbd_smb2_request *smbd_smb2_request_allocate(TALLOC_CTX *mem_ctx)
 123 {
 124         TALLOC_CTX *mem_pool;
 125         struct smbd_smb2_request **parent;
 126         struct smbd_smb2_request *req;
 127
 128         mem_pool = talloc_pool(mem_ctx, 8192);
 129         if (mem_pool == NULL) {
 130                 return NULL;
 131         }
 132
 133         parent = talloc(mem_pool, struct smbd_smb2_request *);
 134         if (parent == NULL) {
 135                 talloc_free(mem_pool);
 136                 return NULL;
 137         }
 138
 139         req = talloc_zero(parent, struct smbd_smb2_request);
 140         if (req == NULL) {
 141                 talloc_free(mem_pool);
 142                 return NULL;
 143         }
 144         *parent         = req;
 145         req->mem_pool   = mem_pool;
 146         req->parent     = parent;
 147
 148         talloc_set_destructor(parent, smbd_smb2_request_parent_destructor);
 149         talloc_set_destructor(req, smbd_smb2_request_destructor);
 150
 151         return req;
 152 }
 153
 154 static NTSTATUS smbd_smb2_request_create(struct smbd_server_connection *conn,
 155                                          const uint8_t *inbuf, size_t size,
 156                                          struct smbd_smb2_request **_req)
 157 {
 158         struct smbd_smb2_request *req;
 159         uint32_t protocol_version;
 160         const uint8_t *inhdr = NULL;
 161         off_t ofs = 0;
 162         uint16_t cmd;
 163         uint32_t next_command_ofs;
 164
 165         if (size < (4 + SMB2_HDR_BODY + 2)) {
 166                 DEBUG(0,("Invalid SMB2 packet length count %ld\n", (long)size));
 167                 return NT_STATUS_INVALID_PARAMETER;
 168         }
 169
 170         inhdr = inbuf + 4;
 171
 172         protocol_version = IVAL(inhdr, SMB2_HDR_PROTOCOL_ID);
 173         if (protocol_version != SMB2_MAGIC) {
 174                 DEBUG(0,("Invalid SMB packet: protocol prefix: 0x%08X\n",
 175                          protocol_version));
 176                 return NT_STATUS_INVALID_PARAMETER;
 177         }
 178
 179         cmd = SVAL(inhdr, SMB2_HDR_OPCODE);
 180         if (cmd != SMB2_OP_NEGPROT) {
 181                 DEBUG(0,("Invalid SMB packet: first request: 0x%04X\n",
 182                          cmd));
 183                 return NT_STATUS_INVALID_PARAMETER;
 184         }
 185
 186         next_command_ofs = IVAL(inhdr, SMB2_HDR_NEXT_COMMAND);
 187         if (next_command_ofs != 0) {
 188                 DEBUG(0,("Invalid SMB packet: next_command: 0x%08X\n",
 189                          next_command_ofs));
 190                 return NT_STATUS_INVALID_PARAMETER;
 191         }
 192
 193         req = smbd_smb2_request_allocate(conn);
 194         if (req == NULL) {
 195                 return NT_STATUS_NO_MEMORY;
 196         }
 197         req->conn = conn;
 198
 199         talloc_steal(req, inbuf);
 200
 201         req->in.vector = talloc_array(req, struct iovec, 4);
 202         if (req->in.vector == NULL) {
 203                 TALLOC_FREE(req);
 204                 return NT_STATUS_NO_MEMORY;
 205         }
 206         req->in.vector_count = 4;
 207
 208         memcpy(req->in.nbt_hdr, inbuf, 4);
 209
 210         ofs = 0;
 211         req->in.vector[0].iov_base      = (void *)req->in.nbt_hdr;
 212         req->in.vector[0].iov_len       = 4;
 213         ofs += req->in.vector[0].iov_len;
 214
 215         req->in.vector[1].iov_base      = (void *)(inbuf + ofs);
 216         req->in.vector[1].iov_len       = SMB2_HDR_BODY;
 217         ofs += req->in.vector[1].iov_len;
 218
 219         req->in.vector[2].iov_base      = (void *)(inbuf + ofs);
 220         req->in.vector[2].iov_len       = SVAL(inbuf, ofs) & 0xFFFE;
 221         ofs += req->in.vector[2].iov_len;
 222
 223         if (ofs > size) {
 224                 return NT_STATUS_INVALID_PARAMETER;
 225         }
 226
 227         req->in.vector[3].iov_base      = (void *)(inbuf + ofs);
 228         req->in.vector[3].iov_len       = size - ofs;
 229         ofs += req->in.vector[3].iov_len;
 230
 231         req->current_idx = 1;
 232
 233         *_req = req;
 234         return NT_STATUS_OK;
 235 }
 236
 237 static NTSTATUS smbd_smb2_request_validate(struct smbd_smb2_request *req)
 238 {
 239         int count;
 240         int idx;
 241         bool compound_related = false;
 242
 243         count = req->in.vector_count;
 244
 245         if (count < 4) {
 246                 /* It's not a SMB2 request */
 247                 return NT_STATUS_INVALID_PARAMETER;
 248         }
 249
 250         for (idx=1; idx < count; idx += 3) {
 251                 const uint8_t *inhdr = NULL;
 252                 uint32_t flags;
 253
 254                 if (req->in.vector[idx].iov_len != SMB2_HDR_BODY) {
 255                         return NT_STATUS_INVALID_PARAMETER;
 256                 }
 257
 258                 if (req->in.vector[idx+1].iov_len < 2) {
 259                         return NT_STATUS_INVALID_PARAMETER;
 260                 }
 261
 262                 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
 263
 264                 /* setup the SMB2 header */
 265                 if (IVAL(inhdr, SMB2_HDR_PROTOCOL_ID) != SMB2_MAGIC) {
 266                         return NT_STATUS_INVALID_PARAMETER;
 267                 }
 268
 269                 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
 270                 if (idx == 1) {
 271                         /*
 272                          * the 1st request should never have the
 273                          * SMB2_HDR_FLAG_CHAINED flag set
 274                          */
 275                         if (flags & SMB2_HDR_FLAG_CHAINED) {
 276                                 req->next_status = NT_STATUS_INVALID_PARAMETER;
 277                                 return NT_STATUS_OK;
 278                         }
 279                 } else if (idx == 4) {
 280                         /*
 281                          * the 2nd request triggers related vs. unrelated
 282                          * compounded requests
 283                          */
 284                         if (flags & SMB2_HDR_FLAG_CHAINED) {
 285                                 compound_related = true;
 286                         }
 287                 } else if (idx > 4) {
 288 #if 0
 289                         /*
 290                          * It seems the this tests are wrong
 291                          * see the SMB2-COMPOUND test
 292                          */
 293
 294                         /*
 295                          * all other requests should match the 2nd one
 296                          */
 297                         if (flags & SMB2_HDR_FLAG_CHAINED) {
 298                                 if (!compound_related) {
 299                                         req->next_status =
 300                                                 NT_STATUS_INVALID_PARAMETER;
 301                                         return NT_STATUS_OK;
 302                                 }
 303                         } else {
 304                                 if (compound_related) {
 305                                         req->next_status =
 306                                                 NT_STATUS_INVALID_PARAMETER;
 307                                         return NT_STATUS_OK;
 308                                 }
 309                         }
 310 #endif
 311                 }
 312         }
 313
 314         return NT_STATUS_OK;
 315 }
 316
 317 static NTSTATUS smbd_smb2_request_setup_out(struct smbd_smb2_request *req)
 318 {
 319         struct iovec *vector;
 320         int count;
 321         int idx;
 322
 323         count = req->in.vector_count;
 324         vector = talloc_array(req, struct iovec, count);
 325         if (vector == NULL) {
 326                 return NT_STATUS_NO_MEMORY;
 327         }
 328
 329         vector[0].iov_base      = req->out.nbt_hdr;
 330         vector[0].iov_len       = 4;
 331         SIVAL(req->out.nbt_hdr, 0, 0);
 332
 333         for (idx=1; idx < count; idx += 3) {
 334                 const uint8_t *inhdr = NULL;
 335                 uint32_t in_flags;
 336                 uint8_t *outhdr = NULL;
 337                 uint8_t *outbody = NULL;
 338                 uint32_t next_command_ofs = 0;
 339                 struct iovec *current = &vector[idx];
 340
 341                 if ((idx + 3) < count) {
 342                         /* we have a next command */
 343                         next_command_ofs = SMB2_HDR_BODY + 8;
 344                 }
 345
 346                 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
 347                 in_flags = IVAL(inhdr, SMB2_HDR_FLAGS);
 348
 349                 outhdr = talloc_array(vector, uint8_t,
 350                                       SMB2_HDR_BODY + 8);
 351                 if (outhdr == NULL) {
 352                         return NT_STATUS_NO_MEMORY;
 353                 }
 354
 355                 outbody = outhdr + SMB2_HDR_BODY;
 356
 357                 current[0].iov_base     = (void *)outhdr;
 358                 current[0].iov_len      = SMB2_HDR_BODY;
 359
 360                 current[1].iov_base     = (void *)outbody;
 361                 current[1].iov_len      = 8;
 362
 363                 current[2].iov_base     = NULL;
 364                 current[2].iov_len      = 0;
 365
 366                 /* setup the SMB2 header */
 367                 SIVAL(outhdr, SMB2_HDR_PROTOCOL_ID,     SMB2_MAGIC);
 368                 SSVAL(outhdr, SMB2_HDR_LENGTH,          SMB2_HDR_BODY);
 369                 SSVAL(outhdr, SMB2_HDR_EPOCH,           0);
 370                 SIVAL(outhdr, SMB2_HDR_STATUS,
 371                       NT_STATUS_V(NT_STATUS_INTERNAL_ERROR));
 372                 SSVAL(outhdr, SMB2_HDR_OPCODE,
 373                       SVAL(inhdr, SMB2_HDR_OPCODE));
 374                 /* Make up a number for now... JRA. FIXME ! FIXME !*/
 375                 SSVAL(outhdr, SMB2_HDR_CREDIT,          20);
 376                 SIVAL(outhdr, SMB2_HDR_FLAGS,
 377                       IVAL(inhdr, SMB2_HDR_FLAGS) | SMB2_HDR_FLAG_REDIRECT);
 378                 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND,    next_command_ofs);
 379                 SBVAL(outhdr, SMB2_HDR_MESSAGE_ID,
 380                       BVAL(inhdr, SMB2_HDR_MESSAGE_ID));
 381                 SIVAL(outhdr, SMB2_HDR_PID,
 382                       IVAL(inhdr, SMB2_HDR_PID));
 383                 SIVAL(outhdr, SMB2_HDR_TID,
 384                       IVAL(inhdr, SMB2_HDR_TID));
 385                 SBVAL(outhdr, SMB2_HDR_SESSION_ID,
 386                       BVAL(inhdr, SMB2_HDR_SESSION_ID));
 387                 memset(outhdr + SMB2_HDR_SIGNATURE, 0, 16);
 388
 389                 /* setup error body header */
 390                 SSVAL(outbody, 0x00, 0x08 + 1);
 391                 SSVAL(outbody, 0x02, 0);
 392                 SIVAL(outbody, 0x04, 0);
 393         }
 394
 395         req->out.vector = vector;
 396         req->out.vector_count = count;
 397
 398         /* setup the length of the NBT packet */
 399         smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
 400
 401         DLIST_ADD_END(req->conn->smb2.requests, req, struct smbd_smb2_request *);
 402
 403         return NT_STATUS_OK;
 404 }
 405
 406 void smbd_server_connection_terminate_ex(struct smbd_server_connection *sconn,
 407                                          const char *reason,
 408                                          const char *location)
 409 {
 410         DEBUG(10,("smbd_server_connection_terminate_ex: reason[%s] at %s\n",
 411                   reason, location));
 412         exit_server_cleanly(reason);
 413 }
 414
 415 static NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req)
 416 {
 417         const uint8_t *inhdr;
 418         int i = req->current_idx;
 419         uint16_t opcode;
 420         uint32_t flags;
 421         NTSTATUS status;
 422         NTSTATUS session_status;
 423
 424         inhdr = (const uint8_t *)req->in.vector[i].iov_base;
 425
 426         /* TODO: verify more things */
 427
 428         flags = IVAL(inhdr, SMB2_HDR_FLAGS);
 429         opcode = IVAL(inhdr, SMB2_HDR_OPCODE);
 430         DEBUG(10,("smbd_smb2_request_dispatch: opcode[%u]\n", opcode));
 431
 432 #define TMP_SMB2_ALLOWED_FLAGS ( \
 433         SMB2_HDR_FLAG_CHAINED | \
 434         SMB2_HDR_FLAG_SIGNED | \
 435         SMB2_HDR_FLAG_DFS)
 436         if ((flags & ~TMP_SMB2_ALLOWED_FLAGS) != 0) {
 437                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
 438         }
 439 #undef TMP_SMB2_ALLOWED_FLAGS
 440
 441         session_status = smbd_smb2_request_check_session(req);
 442
 443         req->do_signing = false;
 444         if (flags & SMB2_HDR_FLAG_SIGNED) {
 445                 if (!NT_STATUS_IS_OK(session_status)) {
 446                         return smbd_smb2_request_error(req, session_status);
 447                 }
 448
 449                 req->do_signing = true;
 450                 status = smb2_signing_check_pdu(req->session->session_key,
 451                                                 &req->in.vector[i], 3);
 452                 if (!NT_STATUS_IS_OK(status)) {
 453                         return smbd_smb2_request_error(req, status);
 454                 }
 455         } else if (req->session && req->session->do_signing) {
 456                 return smbd_smb2_request_error(req, NT_STATUS_ACCESS_DENIED);
 457         }
 458
 459         if (flags & SMB2_HDR_FLAG_CHAINED) {
 460                 /*
 461                  * This check is mostly for giving the correct error code
 462                  * for compounded requests.
 463                  *
 464                  * TODO: we may need to move this after the session
 465                  *       and tcon checks.
 466                  */
 467                 if (!NT_STATUS_IS_OK(req->next_status)) {
 468                         return smbd_smb2_request_error(req, req->next_status);
 469                 }
 470         } else {
 471                 req->compat_chain_fsp = NULL;
 472         }
 473
 474         switch (opcode) {
 475         case SMB2_OP_NEGPROT:
 476                 return smbd_smb2_request_process_negprot(req);
 477
 478         case SMB2_OP_SESSSETUP:
 479                 return smbd_smb2_request_process_sesssetup(req);
 480
 481         case SMB2_OP_LOGOFF:
 482                 if (!NT_STATUS_IS_OK(session_status)) {
 483                         return smbd_smb2_request_error(req, session_status);
 484                 }
 485                 return smbd_smb2_request_process_logoff(req);
 486
 487         case SMB2_OP_TCON:
 488                 if (!NT_STATUS_IS_OK(session_status)) {
 489                         return smbd_smb2_request_error(req, session_status);
 490                 }
 491                 status = smbd_smb2_request_check_session(req);
 492                 if (!NT_STATUS_IS_OK(status)) {
 493                         return smbd_smb2_request_error(req, status);
 494                 }
 495                 return smbd_smb2_request_process_tcon(req);
 496
 497         case SMB2_OP_TDIS:
 498                 if (!NT_STATUS_IS_OK(session_status)) {
 499                         return smbd_smb2_request_error(req, session_status);
 500                 }
 501                 status = smbd_smb2_request_check_tcon(req);
 502                 if (!NT_STATUS_IS_OK(status)) {
 503                         return smbd_smb2_request_error(req, status);
 504                 }
 505                 return smbd_smb2_request_process_tdis(req);
 506
 507         case SMB2_OP_CREATE:
 508                 if (!NT_STATUS_IS_OK(session_status)) {
 509                         return smbd_smb2_request_error(req, session_status);
 510                 }
 511                 status = smbd_smb2_request_check_tcon(req);
 512                 if (!NT_STATUS_IS_OK(status)) {
 513                         return smbd_smb2_request_error(req, status);
 514                 }
 515                 return smbd_smb2_request_process_create(req);
 516
 517         case SMB2_OP_CLOSE:
 518                 if (!NT_STATUS_IS_OK(session_status)) {
 519                         return smbd_smb2_request_error(req, session_status);
 520                 }
 521                 status = smbd_smb2_request_check_tcon(req);
 522                 if (!NT_STATUS_IS_OK(status)) {
 523                         return smbd_smb2_request_error(req, status);
 524                 }
 525                 return smbd_smb2_request_process_close(req);
 526
 527         case SMB2_OP_FLUSH:
 528                 if (!NT_STATUS_IS_OK(session_status)) {
 529                         return smbd_smb2_request_error(req, session_status);
 530                 }
 531                 status = smbd_smb2_request_check_tcon(req);
 532                 if (!NT_STATUS_IS_OK(status)) {
 533                         return smbd_smb2_request_error(req, status);
 534                 }
 535                 return smbd_smb2_request_process_flush(req);
 536
 537         case SMB2_OP_READ:
 538                 if (!NT_STATUS_IS_OK(session_status)) {
 539                         return smbd_smb2_request_error(req, session_status);
 540                 }
 541                 status = smbd_smb2_request_check_tcon(req);
 542                 if (!NT_STATUS_IS_OK(status)) {
 543                         return smbd_smb2_request_error(req, status);
 544                 }
 545                 return smbd_smb2_request_process_read(req);
 546
 547         case SMB2_OP_WRITE:
 548                 if (!NT_STATUS_IS_OK(session_status)) {
 549                         return smbd_smb2_request_error(req, session_status);
 550                 }
 551                 status = smbd_smb2_request_check_tcon(req);
 552                 if (!NT_STATUS_IS_OK(status)) {
 553                         return smbd_smb2_request_error(req, status);
 554                 }
 555                 return smbd_smb2_request_process_write(req);
 556
 557         case SMB2_OP_LOCK:
 558                 if (!NT_STATUS_IS_OK(session_status)) {
 559                         return smbd_smb2_request_error(req, session_status);
 560                 }
 561                 status = smbd_smb2_request_check_tcon(req);
 562                 if (!NT_STATUS_IS_OK(status)) {
 563                         return smbd_smb2_request_error(req, status);
 564                 }
 565                 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
 566
 567         case SMB2_OP_IOCTL:
 568                 if (!NT_STATUS_IS_OK(session_status)) {
 569                         return smbd_smb2_request_error(req, session_status);
 570                 }
 571                 status = smbd_smb2_request_check_tcon(req);
 572                 if (!NT_STATUS_IS_OK(status)) {
 573                         return smbd_smb2_request_error(req, status);
 574                 }
 575                 return smbd_smb2_request_process_ioctl(req);
 576
 577         case SMB2_OP_CANCEL:
 578                 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
 579
 580         case SMB2_OP_KEEPALIVE:
 581                 return smbd_smb2_request_process_keepalive(req);
 582
 583         case SMB2_OP_FIND:
 584                 if (!NT_STATUS_IS_OK(session_status)) {
 585                         return smbd_smb2_request_error(req, session_status);
 586                 }
 587                 status = smbd_smb2_request_check_tcon(req);
 588                 if (!NT_STATUS_IS_OK(status)) {
 589                         return smbd_smb2_request_error(req, status);
 590                 }
 591                 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
 592
 593         case SMB2_OP_NOTIFY:
 594                 if (!NT_STATUS_IS_OK(session_status)) {
 595                         return smbd_smb2_request_error(req, session_status);
 596                 }
 597                 status = smbd_smb2_request_check_tcon(req);
 598                 if (!NT_STATUS_IS_OK(status)) {
 599                         return smbd_smb2_request_error(req, status);
 600                 }
 601                 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
 602
 603         case SMB2_OP_GETINFO:
 604                 if (!NT_STATUS_IS_OK(session_status)) {
 605                         return smbd_smb2_request_error(req, session_status);
 606                 }
 607                 status = smbd_smb2_request_check_tcon(req);
 608                 if (!NT_STATUS_IS_OK(status)) {
 609                         return smbd_smb2_request_error(req, status);
 610                 }
 611                 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
 612
 613         case SMB2_OP_SETINFO:
 614                 if (!NT_STATUS_IS_OK(session_status)) {
 615                         return smbd_smb2_request_error(req, session_status);
 616                 }
 617                 status = smbd_smb2_request_check_tcon(req);
 618                 if (!NT_STATUS_IS_OK(status)) {
 619                         return smbd_smb2_request_error(req, status);
 620                 }
 621                 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
 622
 623         case SMB2_OP_BREAK:
 624                 if (!NT_STATUS_IS_OK(session_status)) {
 625                         return smbd_smb2_request_error(req, session_status);
 626                 }
 627                 status = smbd_smb2_request_check_tcon(req);
 628                 if (!NT_STATUS_IS_OK(status)) {
 629                         return smbd_smb2_request_error(req, status);
 630                 }
 631                 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
 632         }
 633
 634         return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
 635 }
 636
 637 static void smbd_smb2_request_dispatch_compound(struct tevent_req *subreq);
 638 static void smbd_smb2_request_writev_done(struct tevent_req *subreq);
 639
 640 static NTSTATUS smbd_smb2_request_reply(struct smbd_smb2_request *req)
 641 {
 642         struct tevent_req *subreq;
 643
 644         smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
 645
 646         if (req->do_signing) {
 647                 int i = req->current_idx;
 648                 NTSTATUS status;
 649                 status = smb2_signing_sign_pdu(req->session->session_key,
 650                                                &req->out.vector[i], 3);
 651                 if (!NT_STATUS_IS_OK(status)) {
 652                         return status;
 653                 }
 654         }
 655
 656         req->current_idx += 3;
 657
 658         if (req->current_idx < req->out.vector_count) {
 659                 struct timeval zero = timeval_zero();
 660                 subreq = tevent_wakeup_send(req,
 661                                             req->conn->smb2.event_ctx,
 662                                             zero);
 663                 if (subreq == NULL) {
 664                         return NT_STATUS_NO_MEMORY;
 665                 }
 666                 tevent_req_set_callback(subreq,
 667                                         smbd_smb2_request_dispatch_compound,
 668                                         req);
 669
 670                 return NT_STATUS_OK;
 671         }
 672
 673         subreq = tstream_writev_queue_send(req,
 674                                            req->conn->smb2.event_ctx,
 675                                            req->conn->smb2.stream,
 676                                            req->conn->smb2.send_queue,
 677                                            req->out.vector,
 678                                            req->out.vector_count);
 679         if (subreq == NULL) {
 680                 return NT_STATUS_NO_MEMORY;
 681         }
 682         tevent_req_set_callback(subreq, smbd_smb2_request_writev_done, req);
 683
 684         return NT_STATUS_OK;
 685 }
 686
 687 static void smbd_smb2_request_dispatch_compound(struct tevent_req *subreq)
 688 {
 689         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 690                                         struct smbd_smb2_request);
 691         struct smbd_server_connection *conn = req->conn;
 692         NTSTATUS status;
 693
 694         tevent_wakeup_recv(subreq);
 695         TALLOC_FREE(subreq);
 696
 697         DEBUG(10,("smbd_smb2_request_dispatch_compound: idx[%d] of %d vectors\n",
 698                   req->current_idx, req->in.vector_count));
 699
 700         status = smbd_smb2_request_dispatch(req);
 701         if (!NT_STATUS_IS_OK(status)) {
 702                 smbd_server_connection_terminate(conn, nt_errstr(status));
 703                 return;
 704         }
 705 }
 706
 707 static void smbd_smb2_request_writev_done(struct tevent_req *subreq)
 708 {
 709         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 710                                         struct smbd_smb2_request);
 711         struct smbd_server_connection *conn = req->conn;
 712         int ret;
 713         int sys_errno;
 714
 715         ret = tstream_writev_queue_recv(subreq, &sys_errno);
 716         TALLOC_FREE(subreq);
 717         TALLOC_FREE(req);
 718         if (ret == -1) {
 719                 NTSTATUS status = map_nt_error_from_unix(sys_errno);
 720                 smbd_server_connection_terminate(conn, nt_errstr(status));
 721                 return;
 722         }
 723 }
 724
 725 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
 726                                     NTSTATUS status,
 727                                     DATA_BLOB *info,
 728                                     const char *location)
 729 {
 730         uint8_t *outhdr;
 731         uint8_t *outbody;
 732         int i = req->current_idx;
 733
 734         DEBUG(10,("smbd_smb2_request_error_ex: idx[%d] status[%s] |%s| at %s\n",
 735                   i, nt_errstr(status), info ? " +info" : "",
 736                   location));
 737
 738         outhdr = (uint8_t *)req->out.vector[i].iov_base;
 739
 740         SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
 741
 742         outbody = outhdr + SMB2_HDR_BODY;
 743
 744         req->out.vector[i+1].iov_base = (void *)outbody;
 745         req->out.vector[i+1].iov_len = 8;
 746
 747         if (info) {
 748                 SIVAL(outbody, 0x04, info->length);
 749                 req->out.vector[i+2].iov_base   = (void *)info->data;
 750                 req->out.vector[i+2].iov_len    = info->length;
 751         } else {
 752                 req->out.vector[i+2].iov_base = NULL;
 753                 req->out.vector[i+2].iov_len = 0;
 754         }
 755
 756         /*
 757          * if a request fails, all other remaining
 758          * compounded requests should fail too
 759          */
 760         req->next_status = NT_STATUS_INVALID_PARAMETER;
 761
 762         return smbd_smb2_request_reply(req);
 763 }
 764
 765 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
 766                                    NTSTATUS status,
 767                                    DATA_BLOB body, DATA_BLOB *dyn,
 768                                    const char *location)
 769 {
 770         uint8_t *outhdr;
 771         uint8_t *outdyn;
 772         int i = req->current_idx;
 773         uint32_t next_command_ofs;
 774
 775         DEBUG(10,("smbd_smb2_request_done_ex: "
 776                   "idx[%d] status[%s] body[%u] dyn[%s:%u] at %s\n",
 777                   i, nt_errstr(status), (unsigned int)body.length,
 778                   dyn ? "yes": "no",
 779                   (unsigned int)(dyn ? dyn->length : 0),
 780                   location));
 781
 782         if (body.length < 2) {
 783                 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
 784         }
 785
 786         if ((body.length % 2) != 0) {
 787                 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
 788         }
 789
 790         outhdr = (uint8_t *)req->out.vector[i].iov_base;
 791         /* the fallback dynamic buffer */
 792         outdyn = outhdr + SMB2_HDR_BODY + 8;
 793
 794         next_command_ofs = IVAL(outhdr, SMB2_HDR_NEXT_COMMAND);
 795         SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
 796
 797         req->out.vector[i+1].iov_base = (void *)body.data;
 798         req->out.vector[i+1].iov_len = body.length;
 799
 800         if (dyn) {
 801                 req->out.vector[i+2].iov_base   = (void *)dyn->data;
 802                 req->out.vector[i+2].iov_len    = dyn->length;
 803         } else {
 804                 req->out.vector[i+2].iov_base = NULL;
 805                 req->out.vector[i+2].iov_len = 0;
 806         }
 807
 808         /* see if we need to recalculate the offset to the next response */
 809         if (next_command_ofs > 0) {
 810                 next_command_ofs  = SMB2_HDR_BODY;
 811                 next_command_ofs += req->out.vector[i+1].iov_len;
 812                 next_command_ofs += req->out.vector[i+2].iov_len;
 813         }
 814
 815         if ((next_command_ofs % 8) != 0) {
 816                 size_t pad_size = 8 - (next_command_ofs % 8);
 817                 if (req->out.vector[i+2].iov_len == 0) {
 818                         /*
 819                          * if the dyn buffer is empty
 820                          * we can use it to add padding
 821                          */
 822                         uint8_t *pad;
 823
 824                         pad = talloc_zero_array(req->out.vector,
 825                                                 uint8_t, pad_size);
 826                         if (pad == NULL) {
 827                                 return smbd_smb2_request_error(req,
 828                                                 NT_STATUS_NO_MEMORY);
 829                         }
 830
 831                         req->out.vector[i+2].iov_base = (void *)pad;
 832                         req->out.vector[i+2].iov_len = pad_size;
 833                 } else {
 834                         /*
 835                          * For now we copy the dynamic buffer
 836                          * and add the padding to the new buffer
 837                          */
 838                         size_t old_size;
 839                         uint8_t *old_dyn;
 840                         size_t new_size;
 841                         uint8_t *new_dyn;
 842
 843                         old_size = req->out.vector[i+2].iov_len;
 844                         old_dyn = (uint8_t *)req->out.vector[i+2].iov_base;
 845
 846                         new_size = old_size + pad_size;
 847                         new_dyn = talloc_array(req->out.vector,
 848                                                uint8_t, new_size);
 849                         if (new_dyn == NULL) {
 850                                 return smbd_smb2_request_error(req,
 851                                                 NT_STATUS_NO_MEMORY);
 852                         }
 853
 854                         memcpy(new_dyn, old_dyn, old_size);
 855                         memset(new_dyn + old_size, 0, pad_size);
 856
 857                         req->out.vector[i+2].iov_base = (void *)new_dyn;
 858                         req->out.vector[i+2].iov_len = new_size;
 859
 860                         TALLOC_FREE(old_dyn);
 861                 }
 862                 next_command_ofs += pad_size;
 863         }
 864
 865         SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
 866
 867         return smbd_smb2_request_reply(req);
 868 }
 869
 870 struct smbd_smb2_send_oplock_break_state {
 871         struct smbd_server_connection *sconn;
 872         uint8_t buf[4 + SMB2_HDR_BODY + 0x18];
 873         struct iovec vector;
 874 };
 875
 876 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq);
 877
 878 NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
 879                                      uint64_t file_id_persistent,
 880                                      uint64_t file_id_volatile,
 881                                      uint8_t oplock_level)
 882 {
 883         struct smbd_smb2_send_oplock_break_state *state;
 884         struct tevent_req *subreq;
 885         uint8_t *hdr;
 886         uint8_t *body;
 887
 888         state = talloc(sconn, struct smbd_smb2_send_oplock_break_state);
 889         if (state == NULL) {
 890                 return NT_STATUS_NO_MEMORY;
 891         }
 892         state->sconn = sconn;
 893
 894         state->vector.iov_base = (void *)state->buf;
 895         state->vector.iov_len = sizeof(state->buf);
 896
 897         _smb2_setlen(state->buf, sizeof(state->buf) - 4);
 898         hdr = state->buf + 4;
 899         body = hdr + SMB2_HDR_BODY;
 900
 901         SIVAL(hdr, 0,                           SMB2_MAGIC);
 902         SSVAL(hdr, SMB2_HDR_LENGTH,             SMB2_HDR_BODY);
 903         SSVAL(hdr, SMB2_HDR_EPOCH,              0);
 904         SIVAL(hdr, SMB2_HDR_STATUS,             0);
 905         SSVAL(hdr, SMB2_HDR_OPCODE,             SMB2_OP_BREAK);
 906         SSVAL(hdr, SMB2_HDR_CREDIT,             0);
 907         SIVAL(hdr, SMB2_HDR_FLAGS,              SMB2_HDR_FLAG_REDIRECT);
 908         SIVAL(hdr, SMB2_HDR_NEXT_COMMAND,       0);
 909         SBVAL(hdr, SMB2_HDR_MESSAGE_ID,         UINT64_MAX);
 910         SIVAL(hdr, SMB2_HDR_PID,                0);
 911         SIVAL(hdr, SMB2_HDR_TID,                0);
 912         SBVAL(hdr, SMB2_HDR_SESSION_ID,         0);
 913         memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
 914
 915         SSVAL(body, 0x00, 0x18);
 916
 917         SCVAL(body, 0x02, oplock_level);
 918         SCVAL(body, 0x03, 0);           /* reserved */
 919         SIVAL(body, 0x04, 0);           /* reserved */
 920         SBVAL(body, 0x08, file_id_persistent);
 921         SBVAL(body, 0x10, file_id_volatile);
 922
 923         subreq = tstream_writev_queue_send(state,
 924                                            sconn->smb2.event_ctx,
 925                                            sconn->smb2.stream,
 926                                            sconn->smb2.send_queue,
 927                                            &state->vector, 1);
 928         if (subreq == NULL) {
 929                 return NT_STATUS_NO_MEMORY;
 930         }
 931         tevent_req_set_callback(subreq,
 932                                 smbd_smb2_oplock_break_writev_done,
 933                                 state);
 934
 935         return NT_STATUS_OK;
 936 }
 937
 938 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq)
 939 {
 940         struct smbd_smb2_send_oplock_break_state *state =
 941                 tevent_req_callback_data(subreq,
 942                 struct smbd_smb2_send_oplock_break_state);
 943         struct smbd_server_connection *sconn = state->sconn;
 944         int ret;
 945         int sys_errno;
 946
 947         ret = tstream_writev_queue_recv(subreq, &sys_errno);
 948         TALLOC_FREE(subreq);
 949         if (ret == -1) {
 950                 NTSTATUS status = map_nt_error_from_unix(sys_errno);
 951                 smbd_server_connection_terminate(sconn, nt_errstr(status));
 952                 return;
 953         }
 954
 955         TALLOC_FREE(state);
 956 }
 957
 958 struct smbd_smb2_request_read_state {
 959         size_t missing;
 960         bool asked_for_header;
 961         struct smbd_smb2_request *smb2_req;
 962 };
 963
 964 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
 965                                          void *private_data,
 966                                          TALLOC_CTX *mem_ctx,
 967                                          struct iovec **_vector,
 968                                          size_t *_count);
 969 static void smbd_smb2_request_read_done(struct tevent_req *subreq);
 970
 971 static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx,
 972                                         struct tevent_context *ev,
 973                                         struct smbd_server_connection *conn)
 974 {
 975         struct tevent_req *req;
 976         struct smbd_smb2_request_read_state *state;
 977         struct tevent_req *subreq;
 978
 979         req = tevent_req_create(mem_ctx, &state,
 980                                 struct smbd_smb2_request_read_state);
 981         if (req == NULL) {
 982                 return NULL;
 983         }
 984         state->missing = 0;
 985         state->asked_for_header = false;
 986
 987         state->smb2_req = smbd_smb2_request_allocate(state);
 988         if (tevent_req_nomem(state->smb2_req, req)) {
 989                 return tevent_req_post(req, ev);
 990         }
 991         state->smb2_req->conn = conn;
 992
 993         subreq = tstream_readv_pdu_queue_send(state, ev, conn->smb2.stream,
 994                                               conn->smb2.recv_queue,
 995                                               smbd_smb2_request_next_vector,
 996                                               state);
 997         if (tevent_req_nomem(subreq, req)) {
 998                 return tevent_req_post(req, ev);
 999         }
1000         tevent_req_set_callback(subreq, smbd_smb2_request_read_done, req);
1001
1002         return req;
1003 }
1004
1005 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1006                                          void *private_data,
1007                                          TALLOC_CTX *mem_ctx,
1008                                          struct iovec **_vector,
1009                                          size_t *_count)
1010 {
1011         struct smbd_smb2_request_read_state *state =
1012                 talloc_get_type_abort(private_data,
1013                 struct smbd_smb2_request_read_state);
1014         struct smbd_smb2_request *req = state->smb2_req;
1015         struct iovec *vector;
1016         int idx = req->in.vector_count;
1017         size_t len = 0;
1018         uint8_t *buf = NULL;
1019
1020         if (req->in.vector_count == 0) {
1021                 /*
1022                  * first we need to get the NBT header
1023                  */
1024                 req->in.vector = talloc_array(req, struct iovec,
1025                                               req->in.vector_count + 1);
1026                 if (req->in.vector == NULL) {
1027                         return -1;
1028                 }
1029                 req->in.vector_count += 1;
1030
1031                 req->in.vector[idx].iov_base    = (void *)req->in.nbt_hdr;
1032                 req->in.vector[idx].iov_len     = 4;
1033
1034                 vector = talloc_array(mem_ctx, struct iovec, 1);
1035                 if (vector == NULL) {
1036                         return -1;
1037                 }
1038
1039                 vector[0] = req->in.vector[idx];
1040
1041                 *_vector = vector;
1042                 *_count = 1;
1043                 return 0;
1044         }
1045
1046         if (req->in.vector_count == 1) {
1047                 /*
1048                  * Now we analyze the NBT header
1049                  */
1050                 state->missing = smb2_len(req->in.vector[0].iov_base);
1051
1052                 if (state->missing == 0) {
1053                         /* if there're no remaining bytes, we're done */
1054                         *_vector = NULL;
1055                         *_count = 0;
1056                         return 0;
1057                 }
1058
1059                 req->in.vector = talloc_realloc(req, req->in.vector,
1060                                                 struct iovec,
1061                                                 req->in.vector_count + 1);
1062                 if (req->in.vector == NULL) {
1063                         return -1;
1064                 }
1065                 req->in.vector_count += 1;
1066
1067                 if (CVAL(req->in.vector[0].iov_base, 0) != 0) {
1068                         /*
1069                          * it's a special NBT message,
1070                          * so get all remaining bytes
1071                          */
1072                         len = state->missing;
1073                 } else if (state->missing < (SMB2_HDR_BODY + 2)) {
1074                         /*
1075                          * it's an invalid message, just read what we can get
1076                          * and let the caller handle the error
1077                          */
1078                         len = state->missing;
1079                 } else {
1080                         /*
1081                          * We assume it's a SMB2 request,
1082                          * and we first get the header and the
1083                          * first 2 bytes (the struct size) of the body
1084                          */
1085                         len = SMB2_HDR_BODY + 2;
1086
1087                         state->asked_for_header = true;
1088                 }
1089
1090                 state->missing -= len;
1091
1092                 buf = talloc_array(req->in.vector, uint8_t, len);
1093                 if (buf == NULL) {
1094                         return -1;
1095                 }
1096
1097                 req->in.vector[idx].iov_base    = (void *)buf;
1098                 req->in.vector[idx].iov_len     = len;
1099
1100                 vector = talloc_array(mem_ctx, struct iovec, 1);
1101                 if (vector == NULL) {
1102                         return -1;
1103                 }
1104
1105                 vector[0] = req->in.vector[idx];
1106
1107                 *_vector = vector;
1108                 *_count = 1;
1109                 return 0;
1110         }
1111
1112         if (state->missing == 0) {
1113                 /* if there're no remaining bytes, we're done */
1114                 *_vector = NULL;
1115                 *_count = 0;
1116                 return 0;
1117         }
1118
1119         if (state->asked_for_header) {
1120                 const uint8_t *hdr;
1121                 size_t full_size;
1122                 size_t next_command_ofs;
1123                 size_t body_size;
1124                 uint8_t *body;
1125                 size_t dyn_size;
1126                 uint8_t *dyn;
1127                 bool invalid = false;
1128
1129                 state->asked_for_header = false;
1130
1131                 /*
1132                  * We got the SMB2 header and the first 2 bytes
1133                  * of the body. We fix the size to just the header
1134                  * and manually copy the 2 first bytes to the body section
1135                  */
1136                 req->in.vector[idx-1].iov_len = SMB2_HDR_BODY;
1137                 hdr = (const uint8_t *)req->in.vector[idx-1].iov_base;
1138
1139                 /* allocate vectors for body and dynamic areas */
1140                 req->in.vector = talloc_realloc(req, req->in.vector,
1141                                                 struct iovec,
1142                                                 req->in.vector_count + 2);
1143                 if (req->in.vector == NULL) {
1144                         return -1;
1145                 }
1146                 req->in.vector_count += 2;
1147
1148                 full_size = state->missing + SMB2_HDR_BODY + 2;
1149                 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
1150                 body_size = SVAL(hdr, SMB2_HDR_BODY);
1151
1152                 if (next_command_ofs != 0) {
1153                         if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
1154                                 /*
1155                                  * this is invalid, just return a zero
1156                                  * body and let the caller deal with the error
1157                                  */
1158                                 invalid = true;
1159                         } else if (next_command_ofs > full_size) {
1160                                 /*
1161                                  * this is invalid, just return a zero
1162                                  * body and let the caller deal with the error
1163                                  */
1164                                 invalid = true;
1165                         } else {
1166                                 full_size = next_command_ofs;
1167                         }
1168                 }
1169
1170                 if (!invalid) {
1171                         if (body_size < 2) {
1172                                 /*
1173                                  * this is invalid, just return a zero
1174                                  * body and let the caller deal with the error
1175                                  */
1176                                 invalid = true;
1177                         } else if (body_size > (full_size - SMB2_HDR_BODY)) {
1178                                 /*
1179                                  * this is invalid, just return a zero
1180                                  * body and let the caller deal with the error
1181                                  */
1182                                 invalid = true;
1183                         }
1184                 }
1185
1186                 if (invalid) {
1187                         /* the caller should check this */
1188                         body_size = 0;
1189                 }
1190
1191                 if ((body_size % 2) != 0) {
1192                         body_size -= 1;
1193                 }
1194
1195                 dyn_size = full_size - (SMB2_HDR_BODY + body_size);
1196
1197                 state->missing -= (body_size - 2) + dyn_size;
1198
1199                 body = talloc_array(req->in.vector, uint8_t, body_size);
1200                 if (body == NULL) {
1201                         return -1;
1202                 }
1203
1204                 dyn = talloc_array(req->in.vector, uint8_t, dyn_size);
1205                 if (dyn == NULL) {
1206                         return -1;
1207                 }
1208
1209                 req->in.vector[idx].iov_base    = (void *)body;
1210                 req->in.vector[idx].iov_len     = body_size;
1211                 req->in.vector[idx+1].iov_base  = (void *)dyn;
1212                 req->in.vector[idx+1].iov_len   = dyn_size;
1213
1214                 vector = talloc_array(mem_ctx, struct iovec, 2);
1215                 if (vector == NULL) {
1216                         return -1;
1217                 }
1218
1219                 /*
1220                  * the first 2 bytes of the body were already fetched
1221                  * together with the header
1222                  */
1223                 memcpy(body, hdr + SMB2_HDR_BODY, 2);
1224                 vector[0].iov_base = body + 2;
1225                 vector[0].iov_len = req->in.vector[idx].iov_len - 2;
1226
1227                 vector[1] = req->in.vector[idx+1];
1228
1229                 *_vector = vector;
1230                 *_count = 2;
1231                 return 0;
1232         }
1233
1234         /*
1235          * when we endup here, we're looking for a new SMB2 request
1236          * next. And we ask for its header and the first 2 bytes of
1237          * the body (like we did for the first SMB2 request).
1238          */
1239
1240         req->in.vector = talloc_realloc(req, req->in.vector,
1241                                         struct iovec,
1242                                         req->in.vector_count + 1);
1243         if (req->in.vector == NULL) {
1244                 return -1;
1245         }
1246         req->in.vector_count += 1;
1247
1248         /*
1249          * We assume it's a SMB2 request,
1250          * and we first get the header and the
1251          * first 2 bytes (the struct size) of the body
1252          */
1253         len = SMB2_HDR_BODY + 2;
1254
1255         if (len > state->missing) {
1256                 /* let the caller handle the error */
1257                 len = state->missing;
1258         }
1259
1260         state->missing -= len;
1261         state->asked_for_header = true;
1262
1263         buf = talloc_array(req->in.vector, uint8_t, len);
1264         if (buf == NULL) {
1265                 return -1;
1266         }
1267
1268         req->in.vector[idx].iov_base    = (void *)buf;
1269         req->in.vector[idx].iov_len     = len;
1270
1271         vector = talloc_array(mem_ctx, struct iovec, 1);
1272         if (vector == NULL) {
1273                 return -1;
1274         }
1275
1276         vector[0] = req->in.vector[idx];
1277
1278         *_vector = vector;
1279         *_count = 1;
1280         return 0;
1281 }
1282
1283 static void smbd_smb2_request_read_done(struct tevent_req *subreq)
1284 {
1285         struct tevent_req *req =
1286                 tevent_req_callback_data(subreq,
1287                 struct tevent_req);
1288         int ret;
1289         int sys_errno;
1290         NTSTATUS status;
1291
1292         ret = tstream_readv_pdu_queue_recv(subreq, &sys_errno);
1293         if (ret == -1) {
1294                 status = map_nt_error_from_unix(sys_errno);
1295                 tevent_req_nterror(req, status);
1296                 return;
1297         }
1298
1299         tevent_req_done(req);
1300 }
1301
1302 static NTSTATUS smbd_smb2_request_read_recv(struct tevent_req *req,
1303                                             TALLOC_CTX *mem_ctx,
1304                                             struct smbd_smb2_request **_smb2_req)
1305 {
1306         struct smbd_smb2_request_read_state *state =
1307                 tevent_req_data(req,
1308                 struct smbd_smb2_request_read_state);
1309         NTSTATUS status;
1310
1311         if (tevent_req_is_nterror(req, &status)) {
1312                 tevent_req_received(req);
1313                 return status;
1314         }
1315
1316         talloc_steal(mem_ctx, state->smb2_req->mem_pool);
1317         *_smb2_req = state->smb2_req;
1318         tevent_req_received(req);
1319         return NT_STATUS_OK;
1320 }
1321
1322 static void smbd_smb2_request_incoming(struct tevent_req *subreq);
1323
1324 void smbd_smb2_first_negprot(struct smbd_server_connection *conn,
1325                              const uint8_t *inbuf, size_t size)
1326 {
1327         NTSTATUS status;
1328         struct smbd_smb2_request *req;
1329         struct tevent_req *subreq;
1330
1331         DEBUG(10,("smbd_smb2_first_negprot: packet length %u\n",
1332                  (unsigned int)size));
1333
1334         status = smbd_initialize_smb2(conn);
1335         if (!NT_STATUS_IS_OK(status)) {
1336                 smbd_server_connection_terminate(conn, nt_errstr(status));
1337                 return;
1338         }
1339
1340         status = smbd_smb2_request_create(conn, inbuf, size, &req);
1341         if (!NT_STATUS_IS_OK(status)) {
1342                 smbd_server_connection_terminate(conn, nt_errstr(status));
1343                 return;
1344         }
1345
1346         status = smbd_smb2_request_setup_out(req);
1347         if (!NT_STATUS_IS_OK(status)) {
1348                 smbd_server_connection_terminate(conn, nt_errstr(status));
1349                 return;
1350         }
1351
1352         status = smbd_smb2_request_dispatch(req);
1353         if (!NT_STATUS_IS_OK(status)) {
1354                 smbd_server_connection_terminate(conn, nt_errstr(status));
1355                 return;
1356         }
1357
1358         /* ask for the next request */
1359         subreq = smbd_smb2_request_read_send(conn,conn->smb2.event_ctx, conn);
1360         if (subreq == NULL) {
1361                 smbd_server_connection_terminate(conn, "no memory for reading");
1362                 return;
1363         }
1364         tevent_req_set_callback(subreq, smbd_smb2_request_incoming, conn);
1365 }
1366
1367 static void smbd_smb2_request_incoming(struct tevent_req *subreq)
1368 {
1369         struct smbd_server_connection *conn = tevent_req_callback_data(subreq,
1370                                               struct smbd_server_connection);
1371         NTSTATUS status;
1372         struct smbd_smb2_request *req;
1373
1374         status = smbd_smb2_request_read_recv(subreq, conn, &req);
1375         TALLOC_FREE(subreq);
1376         if (!NT_STATUS_IS_OK(status)) {
1377                 smbd_server_connection_terminate(conn, nt_errstr(status));
1378                 return;
1379         }
1380
1381         if (req->in.nbt_hdr[0] != 0x00) {
1382                 DEBUG(1,("smbd_smb2_request_incoming: ignore NBT[0x%02X] msg\n",
1383                          req->in.nbt_hdr[0]));
1384                 TALLOC_FREE(req);
1385                 goto next;
1386         }
1387
1388         req->current_idx = 1;
1389
1390         DEBUG(10,("smbd_smb2_request_incoming: idx[%d] of %d vectors\n",
1391                  req->current_idx, req->in.vector_count));
1392
1393         status = smbd_smb2_request_validate(req);
1394         if (!NT_STATUS_IS_OK(status)) {
1395                 smbd_server_connection_terminate(conn, nt_errstr(status));
1396                 return;
1397         }
1398
1399         status = smbd_smb2_request_setup_out(req);
1400         if (!NT_STATUS_IS_OK(status)) {
1401                 smbd_server_connection_terminate(conn, nt_errstr(status));
1402                 return;
1403         }
1404
1405         status = smbd_smb2_request_dispatch(req);
1406         if (!NT_STATUS_IS_OK(status)) {
1407                 smbd_server_connection_terminate(conn, nt_errstr(status));
1408                 return;
1409         }
1410
1411 next:
1412         /* ask for the next request (this constructs the main loop) */
1413         subreq = smbd_smb2_request_read_send(conn,conn->smb2.event_ctx, conn);
1414         if (subreq == NULL) {
1415                 smbd_server_connection_terminate(conn, "no memory for reading");
1416                 return;
1417         }
1418         tevent_req_set_callback(subreq, smbd_smb2_request_incoming, conn);
1419 }