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 "../libcli/smb/smb_common.h"
  24 #include "../lib/tsocket/tsocket.h"
  25
  26 #define OUTVEC_ALLOC_SIZE (SMB2_HDR_BODY + 9)
  27
  28 static const char *smb2_names[] = {
  29         "SMB2_NEGPROT",
  30         "SMB2_SESSSETUP",
  31         "SMB2_LOGOFF",
  32         "SMB2_TCON",
  33         "SMB2_TDIS",
  34         "SMB2_CREATE",
  35         "SMB2_CLOSE",
  36         "SMB2_FLUSH",
  37         "SMB2_READ",
  38         "SMB2_WRITE",
  39         "SMB2_LOCK",
  40         "SMB2_IOCTL",
  41         "SMB2_CANCEL",
  42         "SMB2_KEEPALIVE",
  43         "SMB2_FIND",
  44         "SMB2_NOTIFY",
  45         "SMB2_GETINFO",
  46         "SMB2_SETINFO",
  47         "SMB2_BREAK"
  48 };
  49
  50 const char *smb2_opcode_name(uint16_t opcode)
  51 {
  52         if (opcode >= 0x12) {
  53                 return "Bad SMB2 opcode";
  54         }
  55         return smb2_names[opcode];
  56 }
  57
  58 static void print_req_vectors(struct smbd_smb2_request *req)
  59 {
  60         int i;
  61
  62         for (i = 0; i < req->in.vector_count; i++) {
  63                 dbgtext("\treq->in.vector[%u].iov_len = %u\n",
  64                         (unsigned int)i,
  65                         (unsigned int)req->in.vector[i].iov_len);
  66         }
  67         for (i = 0; i < req->out.vector_count; i++) {
  68                 dbgtext("\treq->out.vector[%u].iov_len = %u\n",
  69                         (unsigned int)i,
  70                         (unsigned int)req->out.vector[i].iov_len);
  71         }
  72 }
  73
  74 bool smbd_is_smb2_header(const uint8_t *inbuf, size_t size)
  75 {
  76         if (size < (4 + SMB2_HDR_BODY)) {
  77                 return false;
  78         }
  79
  80         if (IVAL(inbuf, 4) != SMB2_MAGIC) {
  81                 return false;
  82         }
  83
  84         return true;
  85 }
  86
  87 static NTSTATUS smbd_initialize_smb2(struct smbd_server_connection *sconn)
  88 {
  89         NTSTATUS status;
  90         int ret;
  91
  92         TALLOC_FREE(sconn->smb1.fde);
  93
  94         sconn->smb2.event_ctx = smbd_event_context();
  95
  96         sconn->smb2.recv_queue = tevent_queue_create(sconn, "smb2 recv queue");
  97         if (sconn->smb2.recv_queue == NULL) {
  98                 return NT_STATUS_NO_MEMORY;
  99         }
 100
 101         sconn->smb2.send_queue = tevent_queue_create(sconn, "smb2 send queue");
 102         if (sconn->smb2.send_queue == NULL) {
 103                 return NT_STATUS_NO_MEMORY;
 104         }
 105
 106         sconn->smb2.sessions.idtree = idr_init(sconn);
 107         if (sconn->smb2.sessions.idtree == NULL) {
 108                 return NT_STATUS_NO_MEMORY;
 109         }
 110         sconn->smb2.sessions.limit = 0x0000FFFE;
 111         sconn->smb2.sessions.list = NULL;
 112
 113         ret = tstream_bsd_existing_socket(sconn, smbd_server_fd(),
 114                                           &sconn->smb2.stream);
 115         if (ret == -1) {
 116                 status = map_nt_error_from_unix(errno);
 117                 return status;
 118         }
 119
 120         /* Ensure child is set to non-blocking mode */
 121         set_blocking(smbd_server_fd(),false);
 122         return NT_STATUS_OK;
 123 }
 124
 125 #define smb2_len(buf) (PVAL(buf,3)|(PVAL(buf,2)<<8)|(PVAL(buf,1)<<16))
 126 #define _smb2_setlen(_buf,len) do { \
 127         uint8_t *buf = (uint8_t *)_buf; \
 128         buf[0] = 0; \
 129         buf[1] = ((len)&0xFF0000)>>16; \
 130         buf[2] = ((len)&0xFF00)>>8; \
 131         buf[3] = (len)&0xFF; \
 132 } while (0)
 133
 134 static void smb2_setup_nbt_length(struct iovec *vector, int count)
 135 {
 136         size_t len = 0;
 137         int i;
 138
 139         for (i=1; i < count; i++) {
 140                 len += vector[i].iov_len;
 141         }
 142
 143         _smb2_setlen(vector[0].iov_base, len);
 144 }
 145
 146 static int smbd_smb2_request_parent_destructor(struct smbd_smb2_request **req)
 147 {
 148         if (*req) {
 149                 (*req)->parent = NULL;
 150                 (*req)->mem_pool = NULL;
 151         }
 152
 153         return 0;
 154 }
 155
 156 static int smbd_smb2_request_destructor(struct smbd_smb2_request *req)
 157 {
 158         if (req->out.vector) {
 159                 DLIST_REMOVE(req->sconn->smb2.requests, req);
 160         }
 161
 162         if (req->parent) {
 163                 *req->parent = NULL;
 164                 talloc_free(req->mem_pool);
 165         }
 166
 167         return 0;
 168 }
 169
 170 static struct smbd_smb2_request *smbd_smb2_request_allocate(TALLOC_CTX *mem_ctx)
 171 {
 172         TALLOC_CTX *mem_pool;
 173         struct smbd_smb2_request **parent;
 174         struct smbd_smb2_request *req;
 175
 176 #if 0
 177         /* Enable this to find subtle valgrind errors. */
 178         mem_pool = talloc_init("smbd_smb2_request_allocate");
 179 #else
 180         mem_pool = talloc_pool(mem_ctx, 8192);
 181 #endif
 182         if (mem_pool == NULL) {
 183                 return NULL;
 184         }
 185
 186         parent = talloc(mem_pool, struct smbd_smb2_request *);
 187         if (parent == NULL) {
 188                 talloc_free(mem_pool);
 189                 return NULL;
 190         }
 191
 192         req = talloc_zero(parent, struct smbd_smb2_request);
 193         if (req == NULL) {
 194                 talloc_free(mem_pool);
 195                 return NULL;
 196         }
 197         *parent         = req;
 198         req->mem_pool   = mem_pool;
 199         req->parent     = parent;
 200
 201         talloc_set_destructor(parent, smbd_smb2_request_parent_destructor);
 202         talloc_set_destructor(req, smbd_smb2_request_destructor);
 203
 204         return req;
 205 }
 206
 207 static NTSTATUS smbd_smb2_request_create(struct smbd_server_connection *sconn,
 208                                          const uint8_t *inbuf, size_t size,
 209                                          struct smbd_smb2_request **_req)
 210 {
 211         struct smbd_smb2_request *req;
 212         uint32_t protocol_version;
 213         const uint8_t *inhdr = NULL;
 214         off_t ofs = 0;
 215         uint16_t cmd;
 216         uint32_t next_command_ofs;
 217
 218         if (size < (4 + SMB2_HDR_BODY + 2)) {
 219                 DEBUG(0,("Invalid SMB2 packet length count %ld\n", (long)size));
 220                 return NT_STATUS_INVALID_PARAMETER;
 221         }
 222
 223         inhdr = inbuf + 4;
 224
 225         protocol_version = IVAL(inhdr, SMB2_HDR_PROTOCOL_ID);
 226         if (protocol_version != SMB2_MAGIC) {
 227                 DEBUG(0,("Invalid SMB packet: protocol prefix: 0x%08X\n",
 228                          protocol_version));
 229                 return NT_STATUS_INVALID_PARAMETER;
 230         }
 231
 232         cmd = SVAL(inhdr, SMB2_HDR_OPCODE);
 233         if (cmd != SMB2_OP_NEGPROT) {
 234                 DEBUG(0,("Invalid SMB packet: first request: 0x%04X\n",
 235                          cmd));
 236                 return NT_STATUS_INVALID_PARAMETER;
 237         }
 238
 239         next_command_ofs = IVAL(inhdr, SMB2_HDR_NEXT_COMMAND);
 240         if (next_command_ofs != 0) {
 241                 DEBUG(0,("Invalid SMB packet: next_command: 0x%08X\n",
 242                          next_command_ofs));
 243                 return NT_STATUS_INVALID_PARAMETER;
 244         }
 245
 246         req = smbd_smb2_request_allocate(sconn);
 247         if (req == NULL) {
 248                 return NT_STATUS_NO_MEMORY;
 249         }
 250         req->sconn = sconn;
 251
 252         talloc_steal(req, inbuf);
 253
 254         req->in.vector = talloc_array(req, struct iovec, 4);
 255         if (req->in.vector == NULL) {
 256                 TALLOC_FREE(req);
 257                 return NT_STATUS_NO_MEMORY;
 258         }
 259         req->in.vector_count = 4;
 260
 261         memcpy(req->in.nbt_hdr, inbuf, 4);
 262
 263         ofs = 0;
 264         req->in.vector[0].iov_base      = (void *)req->in.nbt_hdr;
 265         req->in.vector[0].iov_len       = 4;
 266         ofs += req->in.vector[0].iov_len;
 267
 268         req->in.vector[1].iov_base      = (void *)(inbuf + ofs);
 269         req->in.vector[1].iov_len       = SMB2_HDR_BODY;
 270         ofs += req->in.vector[1].iov_len;
 271
 272         req->in.vector[2].iov_base      = (void *)(inbuf + ofs);
 273         req->in.vector[2].iov_len       = SVAL(inbuf, ofs) & 0xFFFE;
 274         ofs += req->in.vector[2].iov_len;
 275
 276         if (ofs > size) {
 277                 return NT_STATUS_INVALID_PARAMETER;
 278         }
 279
 280         req->in.vector[3].iov_base      = (void *)(inbuf + ofs);
 281         req->in.vector[3].iov_len       = size - ofs;
 282         ofs += req->in.vector[3].iov_len;
 283
 284         req->current_idx = 1;
 285
 286         *_req = req;
 287         return NT_STATUS_OK;
 288 }
 289
 290 static NTSTATUS smbd_smb2_request_validate(struct smbd_smb2_request *req,
 291                                 uint16_t *p_creds_requested)
 292 {
 293         int count;
 294         int idx;
 295         bool compound_related = false;
 296
 297         *p_creds_requested = 0;
 298         count = req->in.vector_count;
 299
 300         if (count < 4) {
 301                 /* It's not a SMB2 request */
 302                 return NT_STATUS_INVALID_PARAMETER;
 303         }
 304
 305         for (idx=1; idx < count; idx += 3) {
 306                 uint16_t creds_requested = 0;
 307                 const uint8_t *inhdr = NULL;
 308                 uint32_t flags;
 309
 310                 if (req->in.vector[idx].iov_len != SMB2_HDR_BODY) {
 311                         return NT_STATUS_INVALID_PARAMETER;
 312                 }
 313
 314                 if (req->in.vector[idx+1].iov_len < 2) {
 315                         return NT_STATUS_INVALID_PARAMETER;
 316                 }
 317
 318                 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
 319
 320                 /* setup the SMB2 header */
 321                 if (IVAL(inhdr, SMB2_HDR_PROTOCOL_ID) != SMB2_MAGIC) {
 322                         return NT_STATUS_INVALID_PARAMETER;
 323                 }
 324
 325                 creds_requested = SVAL(inhdr, SMB2_HDR_CREDIT);
 326                 if (*p_creds_requested + creds_requested < creds_requested) {
 327                         *p_creds_requested = 65535;
 328                 } else {
 329                         *p_creds_requested += creds_requested;
 330                 }
 331
 332                 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
 333                 if (idx == 1) {
 334                         /*
 335                          * the 1st request should never have the
 336                          * SMB2_HDR_FLAG_CHAINED flag set
 337                          */
 338                         if (flags & SMB2_HDR_FLAG_CHAINED) {
 339                                 req->next_status = NT_STATUS_INVALID_PARAMETER;
 340                                 return NT_STATUS_OK;
 341                         }
 342                 } else if (idx == 4) {
 343                         /*
 344                          * the 2nd request triggers related vs. unrelated
 345                          * compounded requests
 346                          */
 347                         if (flags & SMB2_HDR_FLAG_CHAINED) {
 348                                 compound_related = true;
 349                         }
 350                 } else if (idx > 4) {
 351 #if 0
 352                         /*
 353                          * It seems the this tests are wrong
 354                          * see the SMB2-COMPOUND test
 355                          */
 356
 357                         /*
 358                          * all other requests should match the 2nd one
 359                          */
 360                         if (flags & SMB2_HDR_FLAG_CHAINED) {
 361                                 if (!compound_related) {
 362                                         req->next_status =
 363                                                 NT_STATUS_INVALID_PARAMETER;
 364                                         return NT_STATUS_OK;
 365                                 }
 366                         } else {
 367                                 if (compound_related) {
 368                                         req->next_status =
 369                                                 NT_STATUS_INVALID_PARAMETER;
 370                                         return NT_STATUS_OK;
 371                                 }
 372                         }
 373 #endif
 374                 }
 375         }
 376
 377         return NT_STATUS_OK;
 378 }
 379
 380 static NTSTATUS smbd_smb2_request_setup_out(struct smbd_smb2_request *req, uint16_t creds)
 381 {
 382         struct iovec *vector;
 383         int count;
 384         int idx;
 385
 386         count = req->in.vector_count;
 387         vector = talloc_zero_array(req, struct iovec, count);
 388         if (vector == NULL) {
 389                 return NT_STATUS_NO_MEMORY;
 390         }
 391
 392         vector[0].iov_base      = req->out.nbt_hdr;
 393         vector[0].iov_len       = 4;
 394         SIVAL(req->out.nbt_hdr, 0, 0);
 395
 396         for (idx=1; idx < count; idx += 3) {
 397                 const uint8_t *inhdr = NULL;
 398                 uint32_t in_flags;
 399                 uint8_t *outhdr = NULL;
 400                 uint8_t *outbody = NULL;
 401                 uint32_t next_command_ofs = 0;
 402                 struct iovec *current = &vector[idx];
 403
 404                 if ((idx + 3) < count) {
 405                         /* we have a next command -
 406                          * setup for the error case. */
 407                         next_command_ofs = SMB2_HDR_BODY + 9;
 408                 }
 409
 410                 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
 411                 in_flags = IVAL(inhdr, SMB2_HDR_FLAGS);
 412
 413                 outhdr = talloc_zero_array(vector, uint8_t,
 414                                       OUTVEC_ALLOC_SIZE);
 415                 if (outhdr == NULL) {
 416                         return NT_STATUS_NO_MEMORY;
 417                 }
 418
 419                 outbody = outhdr + SMB2_HDR_BODY;
 420
 421                 current[0].iov_base     = (void *)outhdr;
 422                 current[0].iov_len      = SMB2_HDR_BODY;
 423
 424                 current[1].iov_base     = (void *)outbody;
 425                 current[1].iov_len      = 8;
 426
 427                 current[2].iov_base     = NULL;
 428                 current[2].iov_len      = 0;
 429
 430                 /* setup the SMB2 header */
 431                 SIVAL(outhdr, SMB2_HDR_PROTOCOL_ID,     SMB2_MAGIC);
 432                 SSVAL(outhdr, SMB2_HDR_LENGTH,          SMB2_HDR_BODY);
 433                 SSVAL(outhdr, SMB2_HDR_EPOCH,           0);
 434                 SIVAL(outhdr, SMB2_HDR_STATUS,
 435                       NT_STATUS_V(NT_STATUS_INTERNAL_ERROR));
 436                 SSVAL(outhdr, SMB2_HDR_OPCODE,
 437                       SVAL(inhdr, SMB2_HDR_OPCODE));
 438                 SSVAL(outhdr, SMB2_HDR_CREDIT,          creds);
 439                 SIVAL(outhdr, SMB2_HDR_FLAGS,
 440                       IVAL(inhdr, SMB2_HDR_FLAGS) | SMB2_HDR_FLAG_REDIRECT);
 441                 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND,    next_command_ofs);
 442                 SBVAL(outhdr, SMB2_HDR_MESSAGE_ID,
 443                       BVAL(inhdr, SMB2_HDR_MESSAGE_ID));
 444                 SIVAL(outhdr, SMB2_HDR_PID,
 445                       IVAL(inhdr, SMB2_HDR_PID));
 446                 SIVAL(outhdr, SMB2_HDR_TID,
 447                       IVAL(inhdr, SMB2_HDR_TID));
 448                 SBVAL(outhdr, SMB2_HDR_SESSION_ID,
 449                       BVAL(inhdr, SMB2_HDR_SESSION_ID));
 450                 memset(outhdr + SMB2_HDR_SIGNATURE, 0, 16);
 451
 452                 /* setup error body header */
 453                 SSVAL(outbody, 0x00, 0x08 + 1);
 454                 SSVAL(outbody, 0x02, 0);
 455                 SIVAL(outbody, 0x04, 0);
 456         }
 457
 458         req->out.vector = vector;
 459         req->out.vector_count = count;
 460
 461         /* setup the length of the NBT packet */
 462         smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
 463
 464         DLIST_ADD_END(req->sconn->smb2.requests, req, struct smbd_smb2_request *);
 465
 466         return NT_STATUS_OK;
 467 }
 468
 469 void smbd_server_connection_terminate_ex(struct smbd_server_connection *sconn,
 470                                          const char *reason,
 471                                          const char *location)
 472 {
 473         DEBUG(10,("smbd_server_connection_terminate_ex: reason[%s] at %s\n",
 474                   reason, location));
 475         exit_server_cleanly(reason);
 476 }
 477
 478 static bool dup_smb2_vec(struct iovec *dstvec,
 479                         const struct iovec *srcvec,
 480                         int offset)
 481 {
 482
 483         if (srcvec[offset].iov_len &&
 484                         srcvec[offset].iov_base) {
 485                 dstvec[offset].iov_base = talloc_memdup(dstvec,
 486                                         srcvec[offset].iov_base,
 487                                         srcvec[offset].iov_len);
 488                 if (!dstvec[offset].iov_base) {
 489                         return false;
 490                 }
 491                 dstvec[offset].iov_len = srcvec[offset].iov_len;
 492         } else {
 493                 dstvec[offset].iov_base = NULL;
 494                 dstvec[offset].iov_len = 0;
 495         }
 496         return true;
 497 }
 498
 499 static struct smbd_smb2_request *dup_smb2_req(const struct smbd_smb2_request *req)
 500 {
 501         struct smbd_smb2_request *newreq = NULL;
 502         struct iovec *outvec = NULL;
 503         int count = req->out.vector_count;
 504         int i;
 505
 506         newreq = smbd_smb2_request_allocate(req->sconn);
 507         if (!newreq) {
 508                 return NULL;
 509         }
 510
 511         newreq->sconn = req->sconn;
 512         newreq->do_signing = req->do_signing;
 513         newreq->current_idx = req->current_idx;
 514         newreq->async = false;
 515         newreq->cancelled = false;
 516
 517         outvec = talloc_zero_array(newreq, struct iovec, count);
 518         if (!outvec) {
 519                 TALLOC_FREE(newreq);
 520                 return NULL;
 521         }
 522         newreq->out.vector = outvec;
 523         newreq->out.vector_count = count;
 524
 525         /* Setup the outvec's identically to req. */
 526         outvec[0].iov_base = newreq->out.nbt_hdr;
 527         outvec[0].iov_len = 4;
 528         memcpy(newreq->out.nbt_hdr, req->out.nbt_hdr, 4);
 529
 530         for (i = 1; i < count; i += 3) {
 531                 /* i + 0 and i + 1 are always
 532                  * boilerplate. */
 533                 outvec[i].iov_base = talloc_memdup(outvec,
 534                                                 req->out.vector[i].iov_base,
 535                                                 OUTVEC_ALLOC_SIZE);
 536                 if (!outvec[i].iov_base) {
 537                         break;
 538                 }
 539                 outvec[i].iov_len = SMB2_HDR_BODY;
 540
 541                 outvec[i+1].iov_base = ((uint8_t *)outvec[i].iov_base) +
 542                                                 SMB2_HDR_BODY;
 543                 outvec[i+1].iov_len = 8;
 544
 545                 if (req->out.vector[i+2].iov_base ==
 546                                 ((uint8_t *)req->out.vector[i].iov_base) +
 547                                         (OUTVEC_ALLOC_SIZE - 1) &&
 548                                 req->out.vector[i+2].iov_len == 1) {
 549                         /* Common SMB2 error packet case. */
 550                         outvec[i+2].iov_base = ((uint8_t *)outvec[i].iov_base) +
 551                                 (OUTVEC_ALLOC_SIZE - 1);
 552                         outvec[i+2].iov_len = 1;
 553                 } else if (!dup_smb2_vec(outvec,
 554                                 req->out.vector,
 555                                 i)) {
 556                         break;
 557                 }
 558         }
 559
 560         if (i < count) {
 561                 /* Alloc failed. */
 562                 TALLOC_FREE(newreq);
 563                 return NULL;
 564         }
 565
 566         smb2_setup_nbt_length(newreq->out.vector,
 567                 newreq->out.vector_count);
 568
 569         return newreq;
 570 }
 571
 572 static void smbd_smb2_request_writev_done(struct tevent_req *subreq);
 573
 574 static NTSTATUS smb2_send_async_interim_response(const struct smbd_smb2_request *req)
 575 {
 576         int i = 0;
 577         uint8_t *outhdr = NULL;
 578         struct smbd_smb2_request *nreq = NULL;
 579
 580         /* Create a new smb2 request we'll use
 581            for the interim return. */
 582         nreq = dup_smb2_req(req);
 583         if (!nreq) {
 584                 return NT_STATUS_NO_MEMORY;
 585         }
 586
 587         /* Lose the last 3 out vectors. They're the
 588            ones we'll be using for the async reply. */
 589         nreq->out.vector_count -= 3;
 590
 591         smb2_setup_nbt_length(nreq->out.vector,
 592                 nreq->out.vector_count);
 593
 594         /* Step back to the previous reply. */
 595         i = nreq->current_idx - 3;
 596         outhdr = (uint8_t *)nreq->out.vector[i].iov_base;
 597         /* And end the chain. */
 598         SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, 0);
 599
 600         /* Re-sign if needed. */
 601         if (nreq->do_signing) {
 602                 NTSTATUS status;
 603                 status = smb2_signing_sign_pdu(nreq->session->session_key,
 604                                         &nreq->out.vector[i], 3);
 605                 if (!NT_STATUS_IS_OK(status)) {
 606                         return status;
 607                 }
 608         }
 609         if (DEBUGLEVEL >= 10) {
 610                 dbgtext("smb2_send_async_interim_response: nreq->current_idx = %u\n",
 611                         (unsigned int)nreq->current_idx );
 612                 dbgtext("smb2_send_async_interim_response: returning %u vectors\n",
 613                         (unsigned int)nreq->out.vector_count );
 614                 print_req_vectors(nreq);
 615         }
 616         nreq->subreq = tstream_writev_queue_send(nreq,
 617                                         nreq->sconn->smb2.event_ctx,
 618                                         nreq->sconn->smb2.stream,
 619                                         nreq->sconn->smb2.send_queue,
 620                                         nreq->out.vector,
 621                                         nreq->out.vector_count);
 622
 623         if (nreq->subreq == NULL) {
 624                 return NT_STATUS_NO_MEMORY;
 625         }
 626
 627         tevent_req_set_callback(nreq->subreq,
 628                         smbd_smb2_request_writev_done,
 629                         nreq);
 630
 631         return NT_STATUS_OK;
 632 }
 633
 634 struct smbd_smb2_request_pending_state {
 635         struct smbd_server_connection *sconn;
 636         uint8_t buf[4 + SMB2_HDR_BODY + 0x08 + 1];
 637         struct iovec vector[3];
 638 };
 639
 640 static void smbd_smb2_request_pending_writev_done(struct tevent_req *subreq)
 641 {
 642         struct smbd_smb2_request_pending_state *state =
 643                 tevent_req_callback_data(subreq,
 644                         struct smbd_smb2_request_pending_state);
 645         struct smbd_server_connection *sconn = state->sconn;
 646         int ret;
 647         int sys_errno;
 648
 649         ret = tstream_writev_queue_recv(subreq, &sys_errno);
 650         TALLOC_FREE(subreq);
 651         if (ret == -1) {
 652                 NTSTATUS status = map_nt_error_from_unix(sys_errno);
 653                 smbd_server_connection_terminate(sconn, nt_errstr(status));
 654                 return;
 655         }
 656
 657         TALLOC_FREE(state);
 658 }
 659
 660 NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req,
 661                                          struct tevent_req *subreq)
 662 {
 663         NTSTATUS status;
 664         struct smbd_smb2_request_pending_state *state = NULL;
 665         int i = req->current_idx;
 666         uint8_t *reqhdr = NULL;
 667         uint8_t *hdr = NULL;
 668         uint8_t *body = NULL;
 669         uint32_t flags = 0;
 670         uint64_t message_id = 0;
 671         uint64_t async_id = 0;
 672         struct iovec *outvec = NULL;
 673
 674         if (!tevent_req_is_in_progress(subreq)) {
 675                 return NT_STATUS_OK;
 676         }
 677
 678         if (req->async) {
 679                 /* We're already async. */
 680                 return NT_STATUS_OK;
 681         }
 682
 683         if (req->in.vector_count > i + 3) {
 684                 /*
 685                  * We're trying to go async in a compound
 686                  * request chain. This is not allowed.
 687                  * Cancel the outstanding request.
 688                  */
 689                 tevent_req_cancel(subreq);
 690                 return smbd_smb2_request_error(req,
 691                         NT_STATUS_INSUFFICIENT_RESOURCES);
 692         }
 693
 694         req->subreq = subreq;
 695         subreq = NULL;
 696
 697         if (DEBUGLEVEL >= 10) {
 698                 dbgtext("smbd_smb2_request_pending_queue: req->current_idx = %u\n",
 699                         (unsigned int)req->current_idx );
 700                 print_req_vectors(req);
 701         }
 702
 703         if (req->out.vector_count > 4) {
 704                 /* This is a compound reply. We
 705                  * must do an interim response
 706                  * followed by the async response
 707                  * to match W2K8R2.
 708                  */
 709                 status = smb2_send_async_interim_response(req);
 710                 if (!NT_STATUS_IS_OK(status)) {
 711                         return status;
 712                 }
 713         }
 714
 715         reqhdr = (uint8_t *)req->out.vector[i].iov_base;
 716         flags = (IVAL(reqhdr, SMB2_HDR_FLAGS) & ~SMB2_HDR_FLAG_CHAINED);
 717         message_id = BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
 718         async_id = message_id; /* keep it simple for now... */
 719
 720         /*
 721          * What we send is identical to a smbd_smb2_request_error
 722          * packet with an error status of STATUS_PENDING. Make use
 723          * of this fact sometime when refactoring. JRA.
 724          */
 725
 726         state = talloc_zero(req->sconn, struct smbd_smb2_request_pending_state);
 727         if (state == NULL) {
 728                 return NT_STATUS_NO_MEMORY;
 729         }
 730         state->sconn = req->sconn;
 731
 732         state->vector[0].iov_base = (void *)state->buf;
 733         state->vector[0].iov_len = 4;
 734
 735         state->vector[1].iov_base = state->buf + 4;
 736         state->vector[1].iov_len = SMB2_HDR_BODY;
 737
 738         state->vector[2].iov_base = state->buf + 4 + SMB2_HDR_BODY;
 739         state->vector[2].iov_len = 9;
 740
 741         smb2_setup_nbt_length(state->vector, 3);
 742
 743         hdr = (uint8_t *)state->vector[1].iov_base;
 744         body = (uint8_t *)state->vector[2].iov_base;
 745
 746         SIVAL(hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
 747         SSVAL(hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
 748         SSVAL(hdr, SMB2_HDR_EPOCH, 0);
 749         SIVAL(hdr, SMB2_HDR_STATUS, NT_STATUS_V(STATUS_PENDING));
 750         SSVAL(hdr, SMB2_HDR_OPCODE, SVAL(reqhdr, SMB2_HDR_OPCODE));
 751         SSVAL(hdr, SMB2_HDR_CREDIT, 5);
 752         SIVAL(hdr, SMB2_HDR_FLAGS, flags | SMB2_HDR_FLAG_ASYNC);
 753         SIVAL(hdr, SMB2_HDR_NEXT_COMMAND, 0);
 754         SBVAL(hdr, SMB2_HDR_MESSAGE_ID, message_id);
 755         SBVAL(hdr, SMB2_HDR_PID, async_id);
 756         SBVAL(hdr, SMB2_HDR_SESSION_ID,
 757                 BVAL(reqhdr, SMB2_HDR_SESSION_ID));
 758         memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
 759
 760         SSVAL(body, 0x00, 0x08 + 1);
 761
 762         SCVAL(body, 0x02, 0);
 763         SCVAL(body, 0x03, 0);
 764         SIVAL(body, 0x04, 0);
 765         /* Match W2K8R2... */
 766         SCVAL(body, 0x08, 0x21);
 767
 768         if (req->do_signing) {
 769                 status = smb2_signing_sign_pdu(req->session->session_key,
 770                                         state->vector, 3);
 771                 if (!NT_STATUS_IS_OK(status)) {
 772                         return status;
 773                 }
 774         }
 775
 776         subreq = tstream_writev_queue_send(state,
 777                                         req->sconn->smb2.event_ctx,
 778                                         req->sconn->smb2.stream,
 779                                         req->sconn->smb2.send_queue,
 780                                         state->vector,
 781                                         3);
 782
 783         if (subreq == NULL) {
 784                 return NT_STATUS_NO_MEMORY;
 785         }
 786
 787         tevent_req_set_callback(subreq,
 788                         smbd_smb2_request_pending_writev_done,
 789                         state);
 790
 791         /* Note we're going async with this request. */
 792         req->async = true;
 793
 794         /*
 795          * Now manipulate req so that the outstanding async request
 796          * is the only one left in the struct smbd_smb2_request.
 797          */
 798
 799         if (req->current_idx == 1) {
 800                 /* There was only one. */
 801                 goto out;
 802         }
 803
 804         /* Re-arrange the in.vectors. */
 805         req->in.vector[1] = req->in.vector[i];
 806         req->in.vector[2] = req->in.vector[i+1];
 807         req->in.vector[3] = req->in.vector[i+2];
 808         req->in.vector_count = 4;
 809         /* Reset the new in size. */
 810         smb2_setup_nbt_length(req->in.vector, 4);
 811
 812         /* Now recreate the out.vectors. */
 813         outvec = talloc_zero_array(req, struct iovec, 4);
 814         if (!outvec) {
 815                 return NT_STATUS_NO_MEMORY;
 816         }
 817         outvec[0].iov_base = req->out.nbt_hdr;
 818         outvec[0].iov_len = 4;
 819         SIVAL(req->out.nbt_hdr, 0, 0);
 820
 821         outvec[1].iov_base = talloc_memdup(outvec,
 822                                 req->out.vector[i].iov_base,
 823                                 OUTVEC_ALLOC_SIZE);
 824         if (!outvec[1].iov_base) {
 825                 return NT_STATUS_NO_MEMORY;
 826         }
 827         outvec[1].iov_len = SMB2_HDR_BODY;
 828
 829         outvec[2].iov_base = ((uint8_t *)outvec[1].iov_base) +
 830                                 SMB2_HDR_BODY;
 831         outvec[2].iov_len = 8;
 832
 833         if (req->out.vector[i+2].iov_base &&
 834                         req->out.vector[i+2].iov_len) {
 835                 if (req->out.vector[i+2].iov_base ==
 836                                 ((uint8_t *)req->out.vector[i].iov_base) +
 837                                         (OUTVEC_ALLOC_SIZE - 1) &&
 838                                 req->out.vector[i].iov_len == 1) {
 839                         /* Common SMB2 error packet case. */
 840                         outvec[3].iov_base = ((uint8_t *)outvec[1].iov_base) +
 841                                 (OUTVEC_ALLOC_SIZE - 1);
 842                 } else {
 843                         outvec[3].iov_base = talloc_memdup(outvec,
 844                                         req->out.vector[i+2].iov_base,
 845                                         req->out.vector[i+2].iov_len);
 846                         if (!outvec[3].iov_base) {
 847                                 return NT_STATUS_NO_MEMORY;
 848                         }
 849                 }
 850                 outvec[3].iov_len = req->out.vector[i+2].iov_len;
 851         } else {
 852                 outvec[3].iov_base = NULL;
 853                 outvec[3].iov_len = 0;
 854         }
 855
 856         TALLOC_FREE(req->out.vector);
 857
 858         req->out.vector = outvec;
 859
 860         req->current_idx = 1;
 861         req->out.vector_count = 4;
 862
 863   out:
 864
 865         smb2_setup_nbt_length(req->out.vector,
 866                 req->out.vector_count);
 867
 868         /* Ensure our final reply matches the interim one. */
 869         reqhdr = (uint8_t *)req->out.vector[1].iov_base;
 870         SIVAL(reqhdr, SMB2_HDR_FLAGS, flags | SMB2_HDR_FLAG_ASYNC);
 871         SBVAL(reqhdr, SMB2_HDR_PID, async_id);
 872
 873         {
 874                 const uint8_t *inhdr =
 875                         (const uint8_t *)req->in.vector[1].iov_base;
 876                 DEBUG(10,("smbd_smb2_request_pending_queue: opcode[%s] mid %llu "
 877                         "going async\n",
 878                         smb2_opcode_name((uint16_t)IVAL(inhdr, SMB2_HDR_OPCODE)),
 879                         (unsigned long long)async_id ));
 880         }
 881         return NT_STATUS_OK;
 882 }
 883
 884 static NTSTATUS smbd_smb2_request_process_cancel(struct smbd_smb2_request *req)
 885 {
 886         struct smbd_server_connection *sconn = req->sconn;
 887         struct smbd_smb2_request *cur;
 888         const uint8_t *inhdr;
 889         int i = req->current_idx;
 890         uint32_t flags;
 891         uint64_t search_message_id;
 892         uint64_t search_async_id;
 893         uint64_t found_id;
 894
 895         inhdr = (const uint8_t *)req->in.vector[i].iov_base;
 896
 897         flags = IVAL(inhdr, SMB2_HDR_FLAGS);
 898         search_message_id = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
 899         search_async_id = BVAL(inhdr, SMB2_HDR_PID);
 900
 901         /*
 902          * we don't need the request anymore
 903          * cancel requests never have a response
 904          */
 905         TALLOC_FREE(req);
 906
 907         for (cur = sconn->smb2.requests; cur; cur = cur->next) {
 908                 const uint8_t *outhdr;
 909                 uint64_t message_id;
 910                 uint64_t async_id;
 911
 912                 i = cur->current_idx;
 913
 914                 outhdr = (const uint8_t *)cur->out.vector[i].iov_base;
 915
 916                 message_id = BVAL(outhdr, SMB2_HDR_MESSAGE_ID);
 917                 async_id = BVAL(outhdr, SMB2_HDR_PID);
 918
 919                 if (flags & SMB2_HDR_FLAG_ASYNC) {
 920                         if (search_async_id == async_id) {
 921                                 found_id = async_id;
 922                                 break;
 923                         }
 924                 } else {
 925                         if (search_message_id == message_id) {
 926                                 found_id = message_id;
 927                                 break;
 928                         }
 929                 }
 930         }
 931
 932         if (cur && cur->subreq) {
 933                 inhdr = (const uint8_t *)cur->in.vector[i].iov_base;
 934                 DEBUG(10,("smbd_smb2_request_process_cancel: attempting to "
 935                         "cancel opcode[%s] mid %llu\n",
 936                         smb2_opcode_name((uint16_t)IVAL(inhdr, SMB2_HDR_OPCODE)),
 937                         (unsigned long long)found_id ));
 938                 tevent_req_cancel(cur->subreq);
 939         }
 940
 941         return NT_STATUS_OK;
 942 }
 943
 944 NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req)
 945 {
 946         const uint8_t *inhdr;
 947         int i = req->current_idx;
 948         uint16_t opcode;
 949         uint32_t flags;
 950         uint64_t mid;
 951         NTSTATUS status;
 952         NTSTATUS session_status;
 953         uint32_t allowed_flags;
 954
 955         inhdr = (const uint8_t *)req->in.vector[i].iov_base;
 956
 957         /* TODO: verify more things */
 958
 959         flags = IVAL(inhdr, SMB2_HDR_FLAGS);
 960         opcode = IVAL(inhdr, SMB2_HDR_OPCODE);
 961         mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
 962         DEBUG(10,("smbd_smb2_request_dispatch: opcode[%s] mid = %llu\n",
 963                 smb2_opcode_name(opcode),
 964                 (unsigned long long)mid));
 965
 966         allowed_flags = SMB2_HDR_FLAG_CHAINED |
 967                         SMB2_HDR_FLAG_SIGNED |
 968                         SMB2_HDR_FLAG_DFS;
 969         if (opcode == SMB2_OP_CANCEL) {
 970                 allowed_flags |= SMB2_HDR_FLAG_ASYNC;
 971         }
 972         if ((flags & ~allowed_flags) != 0) {
 973                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
 974         }
 975
 976         session_status = smbd_smb2_request_check_session(req);
 977
 978         req->do_signing = false;
 979         if (flags & SMB2_HDR_FLAG_SIGNED) {
 980                 if (!NT_STATUS_IS_OK(session_status)) {
 981                         return smbd_smb2_request_error(req, session_status);
 982                 }
 983
 984                 req->do_signing = true;
 985                 status = smb2_signing_check_pdu(req->session->session_key,
 986                                                 &req->in.vector[i], 3);
 987                 if (!NT_STATUS_IS_OK(status)) {
 988                         return smbd_smb2_request_error(req, status);
 989                 }
 990         } else if (req->session && req->session->do_signing) {
 991                 return smbd_smb2_request_error(req, NT_STATUS_ACCESS_DENIED);
 992         }
 993
 994         if (flags & SMB2_HDR_FLAG_CHAINED) {
 995                 /*
 996                  * This check is mostly for giving the correct error code
 997                  * for compounded requests.
 998                  *
 999                  * TODO: we may need to move this after the session
1000                  *       and tcon checks.
1001                  */
1002                 if (!NT_STATUS_IS_OK(req->next_status)) {
1003                         return smbd_smb2_request_error(req, req->next_status);
1004                 }
1005         } else {
1006                 req->compat_chain_fsp = NULL;
1007         }
1008
1009         switch (opcode) {
1010         case SMB2_OP_NEGPROT:
1011                 return smbd_smb2_request_process_negprot(req);
1012
1013         case SMB2_OP_SESSSETUP:
1014                 return smbd_smb2_request_process_sesssetup(req);
1015
1016         case SMB2_OP_LOGOFF:
1017                 if (!NT_STATUS_IS_OK(session_status)) {
1018                         return smbd_smb2_request_error(req, session_status);
1019                 }
1020                 return smbd_smb2_request_process_logoff(req);
1021
1022         case SMB2_OP_TCON:
1023                 if (!NT_STATUS_IS_OK(session_status)) {
1024                         return smbd_smb2_request_error(req, session_status);
1025                 }
1026                 status = smbd_smb2_request_check_session(req);
1027                 if (!NT_STATUS_IS_OK(status)) {
1028                         return smbd_smb2_request_error(req, status);
1029                 }
1030                 return smbd_smb2_request_process_tcon(req);
1031
1032         case SMB2_OP_TDIS:
1033                 if (!NT_STATUS_IS_OK(session_status)) {
1034                         return smbd_smb2_request_error(req, session_status);
1035                 }
1036                 status = smbd_smb2_request_check_tcon(req);
1037                 if (!NT_STATUS_IS_OK(status)) {
1038                         return smbd_smb2_request_error(req, status);
1039                 }
1040                 return smbd_smb2_request_process_tdis(req);
1041
1042         case SMB2_OP_CREATE:
1043                 if (!NT_STATUS_IS_OK(session_status)) {
1044                         return smbd_smb2_request_error(req, session_status);
1045                 }
1046                 status = smbd_smb2_request_check_tcon(req);
1047                 if (!NT_STATUS_IS_OK(status)) {
1048                         return smbd_smb2_request_error(req, status);
1049                 }
1050                 return smbd_smb2_request_process_create(req);
1051
1052         case SMB2_OP_CLOSE:
1053                 if (!NT_STATUS_IS_OK(session_status)) {
1054                         return smbd_smb2_request_error(req, session_status);
1055                 }
1056                 status = smbd_smb2_request_check_tcon(req);
1057                 if (!NT_STATUS_IS_OK(status)) {
1058                         return smbd_smb2_request_error(req, status);
1059                 }
1060                 return smbd_smb2_request_process_close(req);
1061
1062         case SMB2_OP_FLUSH:
1063                 if (!NT_STATUS_IS_OK(session_status)) {
1064                         return smbd_smb2_request_error(req, session_status);
1065                 }
1066                 status = smbd_smb2_request_check_tcon(req);
1067                 if (!NT_STATUS_IS_OK(status)) {
1068                         return smbd_smb2_request_error(req, status);
1069                 }
1070                 return smbd_smb2_request_process_flush(req);
1071
1072         case SMB2_OP_READ:
1073                 if (!NT_STATUS_IS_OK(session_status)) {
1074                         return smbd_smb2_request_error(req, session_status);
1075                 }
1076                 status = smbd_smb2_request_check_tcon(req);
1077                 if (!NT_STATUS_IS_OK(status)) {
1078                         return smbd_smb2_request_error(req, status);
1079                 }
1080                 return smbd_smb2_request_process_read(req);
1081
1082         case SMB2_OP_WRITE:
1083                 if (!NT_STATUS_IS_OK(session_status)) {
1084                         return smbd_smb2_request_error(req, session_status);
1085                 }
1086                 status = smbd_smb2_request_check_tcon(req);
1087                 if (!NT_STATUS_IS_OK(status)) {
1088                         return smbd_smb2_request_error(req, status);
1089                 }
1090                 return smbd_smb2_request_process_write(req);
1091
1092         case SMB2_OP_LOCK:
1093                 if (!NT_STATUS_IS_OK(session_status)) {
1094                         return smbd_smb2_request_error(req, session_status);
1095                 }
1096                 status = smbd_smb2_request_check_tcon(req);
1097                 if (!NT_STATUS_IS_OK(status)) {
1098                         return smbd_smb2_request_error(req, status);
1099                 }
1100                 return smbd_smb2_request_process_lock(req);
1101
1102         case SMB2_OP_IOCTL:
1103                 if (!NT_STATUS_IS_OK(session_status)) {
1104                         return smbd_smb2_request_error(req, session_status);
1105                 }
1106                 status = smbd_smb2_request_check_tcon(req);
1107                 if (!NT_STATUS_IS_OK(status)) {
1108                         return smbd_smb2_request_error(req, status);
1109                 }
1110                 return smbd_smb2_request_process_ioctl(req);
1111
1112         case SMB2_OP_CANCEL:
1113                 return smbd_smb2_request_process_cancel(req);
1114
1115         case SMB2_OP_KEEPALIVE:
1116                 return smbd_smb2_request_process_keepalive(req);
1117
1118         case SMB2_OP_FIND:
1119                 if (!NT_STATUS_IS_OK(session_status)) {
1120                         return smbd_smb2_request_error(req, session_status);
1121                 }
1122                 status = smbd_smb2_request_check_tcon(req);
1123                 if (!NT_STATUS_IS_OK(status)) {
1124                         return smbd_smb2_request_error(req, status);
1125                 }
1126                 return smbd_smb2_request_process_find(req);
1127
1128         case SMB2_OP_NOTIFY:
1129                 if (!NT_STATUS_IS_OK(session_status)) {
1130                         return smbd_smb2_request_error(req, session_status);
1131                 }
1132                 status = smbd_smb2_request_check_tcon(req);
1133                 if (!NT_STATUS_IS_OK(status)) {
1134                         return smbd_smb2_request_error(req, status);
1135                 }
1136                 return smbd_smb2_request_process_notify(req);
1137
1138         case SMB2_OP_GETINFO:
1139                 if (!NT_STATUS_IS_OK(session_status)) {
1140                         return smbd_smb2_request_error(req, session_status);
1141                 }
1142                 status = smbd_smb2_request_check_tcon(req);
1143                 if (!NT_STATUS_IS_OK(status)) {
1144                         return smbd_smb2_request_error(req, status);
1145                 }
1146                 return smbd_smb2_request_process_getinfo(req);
1147
1148         case SMB2_OP_SETINFO:
1149                 if (!NT_STATUS_IS_OK(session_status)) {
1150                         return smbd_smb2_request_error(req, session_status);
1151                 }
1152                 status = smbd_smb2_request_check_tcon(req);
1153                 if (!NT_STATUS_IS_OK(status)) {
1154                         return smbd_smb2_request_error(req, status);
1155                 }
1156                 return smbd_smb2_request_process_setinfo(req);
1157
1158         case SMB2_OP_BREAK:
1159                 if (!NT_STATUS_IS_OK(session_status)) {
1160                         return smbd_smb2_request_error(req, session_status);
1161                 }
1162                 status = smbd_smb2_request_check_tcon(req);
1163                 if (!NT_STATUS_IS_OK(status)) {
1164                         return smbd_smb2_request_error(req, status);
1165                 }
1166                 return smbd_smb2_request_process_break(req);
1167         }
1168
1169         return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
1170 }
1171
1172 static NTSTATUS smbd_smb2_request_reply(struct smbd_smb2_request *req)
1173 {
1174         struct tevent_req *subreq;
1175
1176         req->subreq = NULL;
1177
1178         smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
1179
1180         if (req->do_signing) {
1181                 int i = req->current_idx;
1182                 NTSTATUS status;
1183                 status = smb2_signing_sign_pdu(req->session->session_key,
1184                                                &req->out.vector[i], 3);
1185                 if (!NT_STATUS_IS_OK(status)) {
1186                         return status;
1187                 }
1188         }
1189
1190         req->current_idx += 3;
1191
1192         if (req->current_idx < req->out.vector_count) {
1193                 /*
1194                  * We must process the remaining compound
1195                  * SMB2 requests before any new incoming SMB2
1196                  * requests. This is because incoming SMB2
1197                  * requests may include a cancel for a
1198                  * compound request we haven't processed
1199                  * yet.
1200                  */
1201                 struct tevent_immediate *im = tevent_create_immediate(req);
1202                 if (!im) {
1203                         return NT_STATUS_NO_MEMORY;
1204                 }
1205                 tevent_schedule_immediate(im,
1206                                         req->sconn->smb2.event_ctx,
1207                                         smbd_smb2_request_dispatch_immediate,
1208                                         req);
1209                 return NT_STATUS_OK;
1210         }
1211
1212         if (DEBUGLEVEL >= 10) {
1213                 dbgtext("smbd_smb2_request_reply: sending...\n");
1214                 print_req_vectors(req);
1215         }
1216
1217         subreq = tstream_writev_queue_send(req,
1218                                            req->sconn->smb2.event_ctx,
1219                                            req->sconn->smb2.stream,
1220                                            req->sconn->smb2.send_queue,
1221                                            req->out.vector,
1222                                            req->out.vector_count);
1223         if (subreq == NULL) {
1224                 return NT_STATUS_NO_MEMORY;
1225         }
1226         tevent_req_set_callback(subreq, smbd_smb2_request_writev_done, req);
1227
1228         return NT_STATUS_OK;
1229 }
1230
1231 void smbd_smb2_request_dispatch_immediate(struct tevent_context *ctx,
1232                                         struct tevent_immediate *im,
1233                                         void *private_data)
1234 {
1235         struct smbd_smb2_request *req = talloc_get_type_abort(private_data,
1236                                         struct smbd_smb2_request);
1237         struct smbd_server_connection *sconn = req->sconn;
1238         NTSTATUS status;
1239
1240         TALLOC_FREE(im);
1241
1242         if (DEBUGLEVEL >= 10) {
1243                 DEBUG(10,("smbd_smb2_request_dispatch_immediate: idx[%d] of %d vectors\n",
1244                         req->current_idx, req->in.vector_count));
1245                 print_req_vectors(req);
1246         }
1247
1248         status = smbd_smb2_request_dispatch(req);
1249         if (!NT_STATUS_IS_OK(status)) {
1250                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1251                 return;
1252         }
1253 }
1254
1255 static void smbd_smb2_request_writev_done(struct tevent_req *subreq)
1256 {
1257         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
1258                                         struct smbd_smb2_request);
1259         struct smbd_server_connection *sconn = req->sconn;
1260         int ret;
1261         int sys_errno;
1262
1263         ret = tstream_writev_queue_recv(subreq, &sys_errno);
1264         TALLOC_FREE(subreq);
1265         TALLOC_FREE(req);
1266         if (ret == -1) {
1267                 NTSTATUS status = map_nt_error_from_unix(sys_errno);
1268                 DEBUG(2,("smbd_smb2_request_writev_done: client write error %s\n",
1269                         nt_errstr(status)));
1270                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1271                 return;
1272         }
1273 }
1274
1275 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
1276                                    NTSTATUS status,
1277                                    DATA_BLOB body, DATA_BLOB *dyn,
1278                                    const char *location)
1279 {
1280         uint8_t *outhdr;
1281         int i = req->current_idx;
1282         uint32_t next_command_ofs;
1283
1284         DEBUG(10,("smbd_smb2_request_done_ex: "
1285                   "idx[%d] status[%s] body[%u] dyn[%s:%u] at %s\n",
1286                   i, nt_errstr(status), (unsigned int)body.length,
1287                   dyn ? "yes": "no",
1288                   (unsigned int)(dyn ? dyn->length : 0),
1289                   location));
1290
1291         if (body.length < 2) {
1292                 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
1293         }
1294
1295         if ((body.length % 2) != 0) {
1296                 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
1297         }
1298
1299         outhdr = (uint8_t *)req->out.vector[i].iov_base;
1300
1301         next_command_ofs = IVAL(outhdr, SMB2_HDR_NEXT_COMMAND);
1302         SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
1303
1304         req->out.vector[i+1].iov_base = (void *)body.data;
1305         req->out.vector[i+1].iov_len = body.length;
1306
1307         if (dyn) {
1308                 req->out.vector[i+2].iov_base   = (void *)dyn->data;
1309                 req->out.vector[i+2].iov_len    = dyn->length;
1310         } else {
1311                 req->out.vector[i+2].iov_base = NULL;
1312                 req->out.vector[i+2].iov_len = 0;
1313         }
1314
1315         /* see if we need to recalculate the offset to the next response */
1316         if (next_command_ofs > 0) {
1317                 next_command_ofs  = SMB2_HDR_BODY;
1318                 next_command_ofs += req->out.vector[i+1].iov_len;
1319                 next_command_ofs += req->out.vector[i+2].iov_len;
1320         }
1321
1322         if ((next_command_ofs % 8) != 0) {
1323                 size_t pad_size = 8 - (next_command_ofs % 8);
1324                 if (req->out.vector[i+2].iov_len == 0) {
1325                         /*
1326                          * if the dyn buffer is empty
1327                          * we can use it to add padding
1328                          */
1329                         uint8_t *pad;
1330
1331                         pad = talloc_zero_array(req->out.vector,
1332                                                 uint8_t, pad_size);
1333                         if (pad == NULL) {
1334                                 return smbd_smb2_request_error(req,
1335                                                 NT_STATUS_NO_MEMORY);
1336                         }
1337
1338                         req->out.vector[i+2].iov_base = (void *)pad;
1339                         req->out.vector[i+2].iov_len = pad_size;
1340                 } else {
1341                         /*
1342                          * For now we copy the dynamic buffer
1343                          * and add the padding to the new buffer
1344                          */
1345                         size_t old_size;
1346                         uint8_t *old_dyn;
1347                         size_t new_size;
1348                         uint8_t *new_dyn;
1349
1350                         old_size = req->out.vector[i+2].iov_len;
1351                         old_dyn = (uint8_t *)req->out.vector[i+2].iov_base;
1352
1353                         new_size = old_size + pad_size;
1354                         new_dyn = talloc_zero_array(req->out.vector,
1355                                                uint8_t, new_size);
1356                         if (new_dyn == NULL) {
1357                                 return smbd_smb2_request_error(req,
1358                                                 NT_STATUS_NO_MEMORY);
1359                         }
1360
1361                         memcpy(new_dyn, old_dyn, old_size);
1362                         memset(new_dyn + old_size, 0, pad_size);
1363
1364                         req->out.vector[i+2].iov_base = (void *)new_dyn;
1365                         req->out.vector[i+2].iov_len = new_size;
1366                 }
1367                 next_command_ofs += pad_size;
1368         }
1369
1370         SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
1371
1372         return smbd_smb2_request_reply(req);
1373 }
1374
1375 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
1376                                     NTSTATUS status,
1377                                     DATA_BLOB *info,
1378                                     const char *location)
1379 {
1380         DATA_BLOB body;
1381         int i = req->current_idx;
1382         uint8_t *outhdr = (uint8_t *)req->out.vector[i].iov_base;
1383
1384         DEBUG(10,("smbd_smb2_request_error_ex: idx[%d] status[%s] |%s| at %s\n",
1385                   i, nt_errstr(status), info ? " +info" : "",
1386                   location));
1387
1388         body.data = outhdr + SMB2_HDR_BODY;
1389         body.length = 8;
1390         SSVAL(body.data, 0, 9);
1391
1392         if (info) {
1393                 SIVAL(body.data, 0x04, info->length);
1394         } else {
1395                 /* Allocated size of req->out.vector[i].iov_base
1396                  * *MUST BE* OUTVEC_ALLOC_SIZE. So we have room for
1397                  * 1 byte without having to do an alloc.
1398                  */
1399                 info = talloc_zero_array(req->out.vector,
1400                                         DATA_BLOB,
1401                                         1);
1402                 if (!info) {
1403                         return NT_STATUS_NO_MEMORY;
1404                 }
1405                 info->data = ((uint8_t *)outhdr) +
1406                         OUTVEC_ALLOC_SIZE - 1;
1407                 info->length = 1;
1408                 SCVAL(info->data, 0, 0);
1409         }
1410
1411         /*
1412          * if a request fails, all other remaining
1413          * compounded requests should fail too
1414          */
1415         req->next_status = NT_STATUS_INVALID_PARAMETER;
1416
1417         return smbd_smb2_request_done_ex(req, status, body, info, __location__);
1418 }
1419
1420
1421 struct smbd_smb2_send_oplock_break_state {
1422         struct smbd_server_connection *sconn;
1423         uint8_t buf[4 + SMB2_HDR_BODY + 0x18];
1424         struct iovec vector;
1425 };
1426
1427 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq);
1428
1429 NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
1430                                      uint64_t file_id_persistent,
1431                                      uint64_t file_id_volatile,
1432                                      uint8_t oplock_level)
1433 {
1434         struct smbd_smb2_send_oplock_break_state *state;
1435         struct tevent_req *subreq;
1436         uint8_t *hdr;
1437         uint8_t *body;
1438
1439         state = talloc(sconn, struct smbd_smb2_send_oplock_break_state);
1440         if (state == NULL) {
1441                 return NT_STATUS_NO_MEMORY;
1442         }
1443         state->sconn = sconn;
1444
1445         state->vector.iov_base = (void *)state->buf;
1446         state->vector.iov_len = sizeof(state->buf);
1447
1448         _smb2_setlen(state->buf, sizeof(state->buf) - 4);
1449         hdr = state->buf + 4;
1450         body = hdr + SMB2_HDR_BODY;
1451
1452         SIVAL(hdr, 0,                           SMB2_MAGIC);
1453         SSVAL(hdr, SMB2_HDR_LENGTH,             SMB2_HDR_BODY);
1454         SSVAL(hdr, SMB2_HDR_EPOCH,              0);
1455         SIVAL(hdr, SMB2_HDR_STATUS,             0);
1456         SSVAL(hdr, SMB2_HDR_OPCODE,             SMB2_OP_BREAK);
1457         SSVAL(hdr, SMB2_HDR_CREDIT,             0);
1458         SIVAL(hdr, SMB2_HDR_FLAGS,              SMB2_HDR_FLAG_REDIRECT);
1459         SIVAL(hdr, SMB2_HDR_NEXT_COMMAND,       0);
1460         SBVAL(hdr, SMB2_HDR_MESSAGE_ID,         UINT64_MAX);
1461         SIVAL(hdr, SMB2_HDR_PID,                0);
1462         SIVAL(hdr, SMB2_HDR_TID,                0);
1463         SBVAL(hdr, SMB2_HDR_SESSION_ID,         0);
1464         memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
1465
1466         SSVAL(body, 0x00, 0x18);
1467
1468         SCVAL(body, 0x02, oplock_level);
1469         SCVAL(body, 0x03, 0);           /* reserved */
1470         SIVAL(body, 0x04, 0);           /* reserved */
1471         SBVAL(body, 0x08, file_id_persistent);
1472         SBVAL(body, 0x10, file_id_volatile);
1473
1474         subreq = tstream_writev_queue_send(state,
1475                                            sconn->smb2.event_ctx,
1476                                            sconn->smb2.stream,
1477                                            sconn->smb2.send_queue,
1478                                            &state->vector, 1);
1479         if (subreq == NULL) {
1480                 return NT_STATUS_NO_MEMORY;
1481         }
1482         tevent_req_set_callback(subreq,
1483                                 smbd_smb2_oplock_break_writev_done,
1484                                 state);
1485
1486         return NT_STATUS_OK;
1487 }
1488
1489 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq)
1490 {
1491         struct smbd_smb2_send_oplock_break_state *state =
1492                 tevent_req_callback_data(subreq,
1493                 struct smbd_smb2_send_oplock_break_state);
1494         struct smbd_server_connection *sconn = state->sconn;
1495         int ret;
1496         int sys_errno;
1497
1498         ret = tstream_writev_queue_recv(subreq, &sys_errno);
1499         TALLOC_FREE(subreq);
1500         if (ret == -1) {
1501                 NTSTATUS status = map_nt_error_from_unix(sys_errno);
1502                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1503                 return;
1504         }
1505
1506         TALLOC_FREE(state);
1507 }
1508
1509 struct smbd_smb2_request_read_state {
1510         size_t missing;
1511         bool asked_for_header;
1512         struct smbd_smb2_request *smb2_req;
1513 };
1514
1515 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1516                                          void *private_data,
1517                                          TALLOC_CTX *mem_ctx,
1518                                          struct iovec **_vector,
1519                                          size_t *_count);
1520 static void smbd_smb2_request_read_done(struct tevent_req *subreq);
1521
1522 static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx,
1523                                         struct tevent_context *ev,
1524                                         struct smbd_server_connection *sconn)
1525 {
1526         struct tevent_req *req;
1527         struct smbd_smb2_request_read_state *state;
1528         struct tevent_req *subreq;
1529
1530         req = tevent_req_create(mem_ctx, &state,
1531                                 struct smbd_smb2_request_read_state);
1532         if (req == NULL) {
1533                 return NULL;
1534         }
1535         state->missing = 0;
1536         state->asked_for_header = false;
1537
1538         state->smb2_req = smbd_smb2_request_allocate(state);
1539         if (tevent_req_nomem(state->smb2_req, req)) {
1540                 return tevent_req_post(req, ev);
1541         }
1542         state->smb2_req->sconn = sconn;
1543
1544         subreq = tstream_readv_pdu_queue_send(state, ev, sconn->smb2.stream,
1545                                               sconn->smb2.recv_queue,
1546                                               smbd_smb2_request_next_vector,
1547                                               state);
1548         if (tevent_req_nomem(subreq, req)) {
1549                 return tevent_req_post(req, ev);
1550         }
1551         tevent_req_set_callback(subreq, smbd_smb2_request_read_done, req);
1552
1553         return req;
1554 }
1555
1556 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1557                                          void *private_data,
1558                                          TALLOC_CTX *mem_ctx,
1559                                          struct iovec **_vector,
1560                                          size_t *_count)
1561 {
1562         struct smbd_smb2_request_read_state *state =
1563                 talloc_get_type_abort(private_data,
1564                 struct smbd_smb2_request_read_state);
1565         struct smbd_smb2_request *req = state->smb2_req;
1566         struct iovec *vector;
1567         int idx = req->in.vector_count;
1568         size_t len = 0;
1569         uint8_t *buf = NULL;
1570
1571         if (req->in.vector_count == 0) {
1572                 /*
1573                  * first we need to get the NBT header
1574                  */
1575                 req->in.vector = talloc_array(req, struct iovec,
1576                                               req->in.vector_count + 1);
1577                 if (req->in.vector == NULL) {
1578                         return -1;
1579                 }
1580                 req->in.vector_count += 1;
1581
1582                 req->in.vector[idx].iov_base    = (void *)req->in.nbt_hdr;
1583                 req->in.vector[idx].iov_len     = 4;
1584
1585                 vector = talloc_array(mem_ctx, struct iovec, 1);
1586                 if (vector == NULL) {
1587                         return -1;
1588                 }
1589
1590                 vector[0] = req->in.vector[idx];
1591
1592                 *_vector = vector;
1593                 *_count = 1;
1594                 return 0;
1595         }
1596
1597         if (req->in.vector_count == 1) {
1598                 /*
1599                  * Now we analyze the NBT header
1600                  */
1601                 state->missing = smb2_len(req->in.vector[0].iov_base);
1602
1603                 if (state->missing == 0) {
1604                         /* if there're no remaining bytes, we're done */
1605                         *_vector = NULL;
1606                         *_count = 0;
1607                         return 0;
1608                 }
1609
1610                 req->in.vector = talloc_realloc(req, req->in.vector,
1611                                                 struct iovec,
1612                                                 req->in.vector_count + 1);
1613                 if (req->in.vector == NULL) {
1614                         return -1;
1615                 }
1616                 req->in.vector_count += 1;
1617
1618                 if (CVAL(req->in.vector[0].iov_base, 0) != 0) {
1619                         /*
1620                          * it's a special NBT message,
1621                          * so get all remaining bytes
1622                          */
1623                         len = state->missing;
1624                 } else if (state->missing < (SMB2_HDR_BODY + 2)) {
1625                         /*
1626                          * it's an invalid message, just read what we can get
1627                          * and let the caller handle the error
1628                          */
1629                         len = state->missing;
1630                 } else {
1631                         /*
1632                          * We assume it's a SMB2 request,
1633                          * and we first get the header and the
1634                          * first 2 bytes (the struct size) of the body
1635                          */
1636                         len = SMB2_HDR_BODY + 2;
1637
1638                         state->asked_for_header = true;
1639                 }
1640
1641                 state->missing -= len;
1642
1643                 buf = talloc_array(req->in.vector, uint8_t, len);
1644                 if (buf == NULL) {
1645                         return -1;
1646                 }
1647
1648                 req->in.vector[idx].iov_base    = (void *)buf;
1649                 req->in.vector[idx].iov_len     = len;
1650
1651                 vector = talloc_array(mem_ctx, struct iovec, 1);
1652                 if (vector == NULL) {
1653                         return -1;
1654                 }
1655
1656                 vector[0] = req->in.vector[idx];
1657
1658                 *_vector = vector;
1659                 *_count = 1;
1660                 return 0;
1661         }
1662
1663         if (state->missing == 0) {
1664                 /* if there're no remaining bytes, we're done */
1665                 *_vector = NULL;
1666                 *_count = 0;
1667                 return 0;
1668         }
1669
1670         if (state->asked_for_header) {
1671                 const uint8_t *hdr;
1672                 size_t full_size;
1673                 size_t next_command_ofs;
1674                 size_t body_size;
1675                 uint8_t *body;
1676                 size_t dyn_size;
1677                 uint8_t *dyn;
1678                 bool invalid = false;
1679
1680                 state->asked_for_header = false;
1681
1682                 /*
1683                  * We got the SMB2 header and the first 2 bytes
1684                  * of the body. We fix the size to just the header
1685                  * and manually copy the 2 first bytes to the body section
1686                  */
1687                 req->in.vector[idx-1].iov_len = SMB2_HDR_BODY;
1688                 hdr = (const uint8_t *)req->in.vector[idx-1].iov_base;
1689
1690                 /* allocate vectors for body and dynamic areas */
1691                 req->in.vector = talloc_realloc(req, req->in.vector,
1692                                                 struct iovec,
1693                                                 req->in.vector_count + 2);
1694                 if (req->in.vector == NULL) {
1695                         return -1;
1696                 }
1697                 req->in.vector_count += 2;
1698
1699                 full_size = state->missing + SMB2_HDR_BODY + 2;
1700                 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
1701                 body_size = SVAL(hdr, SMB2_HDR_BODY);
1702
1703                 if (next_command_ofs != 0) {
1704                         if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
1705                                 /*
1706                                  * this is invalid, just return a zero
1707                                  * body and let the caller deal with the error
1708                                  */
1709                                 invalid = true;
1710                         } else if (next_command_ofs > full_size) {
1711                                 /*
1712                                  * this is invalid, just return a zero
1713                                  * body and let the caller deal with the error
1714                                  */
1715                                 invalid = true;
1716                         } else {
1717                                 full_size = next_command_ofs;
1718                         }
1719                 }
1720
1721                 if (!invalid) {
1722                         if (body_size < 2) {
1723                                 /*
1724                                  * this is invalid, just return a zero
1725                                  * body and let the caller deal with the error
1726                                  */
1727                                 invalid = true;
1728                         }
1729
1730                         if ((body_size % 2) != 0) {
1731                                 body_size -= 1;
1732                         }
1733
1734                         if (body_size > (full_size - SMB2_HDR_BODY)) {
1735                                 /*
1736                                  * this is invalid, just return a zero
1737                                  * body and let the caller deal with the error
1738                                  */
1739                                 invalid = true;
1740                         }
1741                 }
1742
1743                 if (invalid) {
1744                         /* the caller should check this */
1745                         body_size = 2;
1746                 }
1747
1748                 dyn_size = full_size - (SMB2_HDR_BODY + body_size);
1749
1750                 state->missing -= (body_size - 2) + dyn_size;
1751
1752                 body = talloc_array(req->in.vector, uint8_t, body_size);
1753                 if (body == NULL) {
1754                         return -1;
1755                 }
1756
1757                 dyn = talloc_array(req->in.vector, uint8_t, dyn_size);
1758                 if (dyn == NULL) {
1759                         return -1;
1760                 }
1761
1762                 req->in.vector[idx].iov_base    = (void *)body;
1763                 req->in.vector[idx].iov_len     = body_size;
1764                 req->in.vector[idx+1].iov_base  = (void *)dyn;
1765                 req->in.vector[idx+1].iov_len   = dyn_size;
1766
1767                 vector = talloc_array(mem_ctx, struct iovec, 2);
1768                 if (vector == NULL) {
1769                         return -1;
1770                 }
1771
1772                 /*
1773                  * the first 2 bytes of the body were already fetched
1774                  * together with the header
1775                  */
1776                 memcpy(body, hdr + SMB2_HDR_BODY, 2);
1777                 vector[0].iov_base = body + 2;
1778                 vector[0].iov_len = body_size - 2;
1779
1780                 vector[1] = req->in.vector[idx+1];
1781
1782                 *_vector = vector;
1783                 *_count = 2;
1784                 return 0;
1785         }
1786
1787         /*
1788          * when we endup here, we're looking for a new SMB2 request
1789          * next. And we ask for its header and the first 2 bytes of
1790          * the body (like we did for the first SMB2 request).
1791          */
1792
1793         req->in.vector = talloc_realloc(req, req->in.vector,
1794                                         struct iovec,
1795                                         req->in.vector_count + 1);
1796         if (req->in.vector == NULL) {
1797                 return -1;
1798         }
1799         req->in.vector_count += 1;
1800
1801         /*
1802          * We assume it's a SMB2 request,
1803          * and we first get the header and the
1804          * first 2 bytes (the struct size) of the body
1805          */
1806         len = SMB2_HDR_BODY + 2;
1807
1808         if (len > state->missing) {
1809                 /* let the caller handle the error */
1810                 len = state->missing;
1811         }
1812
1813         state->missing -= len;
1814         state->asked_for_header = true;
1815
1816         buf = talloc_array(req->in.vector, uint8_t, len);
1817         if (buf == NULL) {
1818                 return -1;
1819         }
1820
1821         req->in.vector[idx].iov_base    = (void *)buf;
1822         req->in.vector[idx].iov_len     = len;
1823
1824         vector = talloc_array(mem_ctx, struct iovec, 1);
1825         if (vector == NULL) {
1826                 return -1;
1827         }
1828
1829         vector[0] = req->in.vector[idx];
1830
1831         *_vector = vector;
1832         *_count = 1;
1833         return 0;
1834 }
1835
1836 static void smbd_smb2_request_read_done(struct tevent_req *subreq)
1837 {
1838         struct tevent_req *req =
1839                 tevent_req_callback_data(subreq,
1840                 struct tevent_req);
1841         int ret;
1842         int sys_errno;
1843         NTSTATUS status;
1844
1845         ret = tstream_readv_pdu_queue_recv(subreq, &sys_errno);
1846         if (ret == -1) {
1847                 status = map_nt_error_from_unix(sys_errno);
1848                 tevent_req_nterror(req, status);
1849                 return;
1850         }
1851
1852         tevent_req_done(req);
1853 }
1854
1855 static NTSTATUS smbd_smb2_request_read_recv(struct tevent_req *req,
1856                                             TALLOC_CTX *mem_ctx,
1857                                             struct smbd_smb2_request **_smb2_req)
1858 {
1859         struct smbd_smb2_request_read_state *state =
1860                 tevent_req_data(req,
1861                 struct smbd_smb2_request_read_state);
1862         NTSTATUS status;
1863
1864         if (tevent_req_is_nterror(req, &status)) {
1865                 tevent_req_received(req);
1866                 return status;
1867         }
1868
1869         talloc_steal(mem_ctx, state->smb2_req->mem_pool);
1870         *_smb2_req = state->smb2_req;
1871         tevent_req_received(req);
1872         return NT_STATUS_OK;
1873 }
1874
1875 static void smbd_smb2_request_incoming(struct tevent_req *subreq);
1876
1877 void smbd_smb2_first_negprot(struct smbd_server_connection *sconn,
1878                              const uint8_t *inbuf, size_t size)
1879 {
1880         NTSTATUS status;
1881         struct smbd_smb2_request *req;
1882         struct tevent_req *subreq;
1883
1884         DEBUG(10,("smbd_smb2_first_negprot: packet length %u\n",
1885                  (unsigned int)size));
1886
1887         status = smbd_initialize_smb2(sconn);
1888         if (!NT_STATUS_IS_OK(status)) {
1889                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1890                 return;
1891         }
1892
1893         status = smbd_smb2_request_create(sconn, inbuf, size, &req);
1894         if (!NT_STATUS_IS_OK(status)) {
1895                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1896                 return;
1897         }
1898
1899         status = smbd_smb2_request_setup_out(req, (uint16_t)lp_maxmux());
1900         if (!NT_STATUS_IS_OK(status)) {
1901                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1902                 return;
1903         }
1904
1905         status = smbd_smb2_request_dispatch(req);
1906         if (!NT_STATUS_IS_OK(status)) {
1907                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1908                 return;
1909         }
1910
1911         /* ask for the next request */
1912         subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
1913         if (subreq == NULL) {
1914                 smbd_server_connection_terminate(sconn, "no memory for reading");
1915                 return;
1916         }
1917         tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
1918 }
1919
1920 static void smbd_smb2_request_incoming(struct tevent_req *subreq)
1921 {
1922         uint16_t creds_requested = 0;
1923         struct smbd_server_connection *sconn = tevent_req_callback_data(subreq,
1924                                                struct smbd_server_connection);
1925         NTSTATUS status;
1926         struct smbd_smb2_request *req = NULL;
1927
1928         status = smbd_smb2_request_read_recv(subreq, sconn, &req);
1929         TALLOC_FREE(subreq);
1930         if (!NT_STATUS_IS_OK(status)) {
1931                 DEBUG(2,("smbd_smb2_request_incoming: client read error %s\n",
1932                         nt_errstr(status)));
1933                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1934                 return;
1935         }
1936
1937         if (req->in.nbt_hdr[0] != 0x00) {
1938                 DEBUG(1,("smbd_smb2_request_incoming: ignore NBT[0x%02X] msg\n",
1939                          req->in.nbt_hdr[0]));
1940                 TALLOC_FREE(req);
1941                 goto next;
1942         }
1943
1944         req->current_idx = 1;
1945
1946         DEBUG(10,("smbd_smb2_request_incoming: idx[%d] of %d vectors\n",
1947                  req->current_idx, req->in.vector_count));
1948
1949         status = smbd_smb2_request_validate(req, &creds_requested);
1950         if (!NT_STATUS_IS_OK(status)) {
1951                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1952                 return;
1953         }
1954
1955         status = smbd_smb2_request_setup_out(req, 5);
1956         if (!NT_STATUS_IS_OK(status)) {
1957                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1958                 return;
1959         }
1960
1961         status = smbd_smb2_request_dispatch(req);
1962         if (!NT_STATUS_IS_OK(status)) {
1963                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1964                 return;
1965         }
1966
1967 next:
1968         /* ask for the next request (this constructs the main loop) */
1969         subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
1970         if (subreq == NULL) {
1971                 smbd_server_connection_terminate(sconn, "no memory for reading");
1972                 return;
1973         }
1974         tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
1975 }