source3/smbd/smb2_server.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   6    Copyright (C) Jeremy Allison 2010
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "smbd/globals.h"
  24 #include "../libcli/smb/smb_common.h"
  25 #include "../lib/tsocket/tsocket.h"
  26
  27 #define OUTVEC_ALLOC_SIZE (SMB2_HDR_BODY + 9)
  28
  29 static const char *smb2_names[] = {
  30         "SMB2_NEGPROT",
  31         "SMB2_SESSSETUP",
  32         "SMB2_LOGOFF",
  33         "SMB2_TCON",
  34         "SMB2_TDIS",
  35         "SMB2_CREATE",
  36         "SMB2_CLOSE",
  37         "SMB2_FLUSH",
  38         "SMB2_READ",
  39         "SMB2_WRITE",
  40         "SMB2_LOCK",
  41         "SMB2_IOCTL",
  42         "SMB2_CANCEL",
  43         "SMB2_KEEPALIVE",
  44         "SMB2_FIND",
  45         "SMB2_NOTIFY",
  46         "SMB2_GETINFO",
  47         "SMB2_SETINFO",
  48         "SMB2_BREAK"
  49 };
  50
  51 const char *smb2_opcode_name(uint16_t opcode)
  52 {
  53         if (opcode > 0x12) {
  54                 return "Bad SMB2 opcode";
  55         }
  56         return smb2_names[opcode];
  57 }
  58
  59 static void print_req_vectors(struct smbd_smb2_request *req)
  60 {
  61         int i;
  62
  63         for (i = 0; i < req->in.vector_count; i++) {
  64                 dbgtext("\treq->in.vector[%u].iov_len = %u\n",
  65                         (unsigned int)i,
  66                         (unsigned int)req->in.vector[i].iov_len);
  67         }
  68         for (i = 0; i < req->out.vector_count; i++) {
  69                 dbgtext("\treq->out.vector[%u].iov_len = %u\n",
  70                         (unsigned int)i,
  71                         (unsigned int)req->out.vector[i].iov_len);
  72         }
  73 }
  74
  75 bool smbd_is_smb2_header(const uint8_t *inbuf, size_t size)
  76 {
  77         if (size < (4 + SMB2_HDR_BODY)) {
  78                 return false;
  79         }
  80
  81         if (IVAL(inbuf, 4) != SMB2_MAGIC) {
  82                 return false;
  83         }
  84
  85         return true;
  86 }
  87
  88 static NTSTATUS smbd_initialize_smb2(struct smbd_server_connection *sconn)
  89 {
  90         NTSTATUS status;
  91         int ret;
  92
  93         TALLOC_FREE(sconn->smb1.fde);
  94
  95         sconn->smb2.event_ctx = smbd_event_context();
  96
  97         sconn->smb2.recv_queue = tevent_queue_create(sconn, "smb2 recv queue");
  98         if (sconn->smb2.recv_queue == NULL) {
  99                 return NT_STATUS_NO_MEMORY;
 100         }
 101
 102         sconn->smb2.send_queue = tevent_queue_create(sconn, "smb2 send queue");
 103         if (sconn->smb2.send_queue == NULL) {
 104                 return NT_STATUS_NO_MEMORY;
 105         }
 106
 107         sconn->smb2.sessions.idtree = idr_init(sconn);
 108         if (sconn->smb2.sessions.idtree == NULL) {
 109                 return NT_STATUS_NO_MEMORY;
 110         }
 111         sconn->smb2.sessions.limit = 0x0000FFFE;
 112         sconn->smb2.sessions.list = NULL;
 113
 114         ret = tstream_bsd_existing_socket(sconn, smbd_server_fd(),
 115                                           &sconn->smb2.stream);
 116         if (ret == -1) {
 117                 status = map_nt_error_from_unix(errno);
 118                 return status;
 119         }
 120
 121         /* Ensure child is set to non-blocking mode */
 122         set_blocking(smbd_server_fd(),false);
 123         return NT_STATUS_OK;
 124 }
 125
 126 #define smb2_len(buf) (PVAL(buf,3)|(PVAL(buf,2)<<8)|(PVAL(buf,1)<<16))
 127 #define _smb2_setlen(_buf,len) do { \
 128         uint8_t *buf = (uint8_t *)_buf; \
 129         buf[0] = 0; \
 130         buf[1] = ((len)&0xFF0000)>>16; \
 131         buf[2] = ((len)&0xFF00)>>8; \
 132         buf[3] = (len)&0xFF; \
 133 } while (0)
 134
 135 static void smb2_setup_nbt_length(struct iovec *vector, int count)
 136 {
 137         size_t len = 0;
 138         int i;
 139
 140         for (i=1; i < count; i++) {
 141                 len += vector[i].iov_len;
 142         }
 143
 144         _smb2_setlen(vector[0].iov_base, len);
 145 }
 146
 147 static int smbd_smb2_request_parent_destructor(struct smbd_smb2_request **req)
 148 {
 149         if (*req) {
 150                 (*req)->parent = NULL;
 151                 (*req)->mem_pool = NULL;
 152         }
 153
 154         return 0;
 155 }
 156
 157 static int smbd_smb2_request_destructor(struct smbd_smb2_request *req)
 158 {
 159         if (req->parent) {
 160                 *req->parent = NULL;
 161                 talloc_free(req->mem_pool);
 162         }
 163
 164         return 0;
 165 }
 166
 167 static struct smbd_smb2_request *smbd_smb2_request_allocate(TALLOC_CTX *mem_ctx)
 168 {
 169         TALLOC_CTX *mem_pool;
 170         struct smbd_smb2_request **parent;
 171         struct smbd_smb2_request *req;
 172
 173 #if 0
 174         /* Enable this to find subtle valgrind errors. */
 175         mem_pool = talloc_init("smbd_smb2_request_allocate");
 176 #else
 177         mem_pool = talloc_pool(mem_ctx, 8192);
 178 #endif
 179         if (mem_pool == NULL) {
 180                 return NULL;
 181         }
 182
 183         parent = talloc(mem_pool, struct smbd_smb2_request *);
 184         if (parent == NULL) {
 185                 talloc_free(mem_pool);
 186                 return NULL;
 187         }
 188
 189         req = talloc_zero(parent, struct smbd_smb2_request);
 190         if (req == NULL) {
 191                 talloc_free(mem_pool);
 192                 return NULL;
 193         }
 194         *parent         = req;
 195         req->mem_pool   = mem_pool;
 196         req->parent     = parent;
 197
 198         talloc_set_destructor(parent, smbd_smb2_request_parent_destructor);
 199         talloc_set_destructor(req, smbd_smb2_request_destructor);
 200
 201         return req;
 202 }
 203
 204 static NTSTATUS smbd_smb2_request_create(struct smbd_server_connection *sconn,
 205                                          const uint8_t *inbuf, size_t size,
 206                                          struct smbd_smb2_request **_req)
 207 {
 208         struct smbd_smb2_request *req;
 209         uint32_t protocol_version;
 210         const uint8_t *inhdr = NULL;
 211         off_t ofs = 0;
 212         uint16_t cmd;
 213         uint32_t next_command_ofs;
 214
 215         if (size < (4 + SMB2_HDR_BODY + 2)) {
 216                 DEBUG(0,("Invalid SMB2 packet length count %ld\n", (long)size));
 217                 return NT_STATUS_INVALID_PARAMETER;
 218         }
 219
 220         inhdr = inbuf + 4;
 221
 222         protocol_version = IVAL(inhdr, SMB2_HDR_PROTOCOL_ID);
 223         if (protocol_version != SMB2_MAGIC) {
 224                 DEBUG(0,("Invalid SMB packet: protocol prefix: 0x%08X\n",
 225                          protocol_version));
 226                 return NT_STATUS_INVALID_PARAMETER;
 227         }
 228
 229         cmd = SVAL(inhdr, SMB2_HDR_OPCODE);
 230         if (cmd != SMB2_OP_NEGPROT) {
 231                 DEBUG(0,("Invalid SMB packet: first request: 0x%04X\n",
 232                          cmd));
 233                 return NT_STATUS_INVALID_PARAMETER;
 234         }
 235
 236         next_command_ofs = IVAL(inhdr, SMB2_HDR_NEXT_COMMAND);
 237         if (next_command_ofs != 0) {
 238                 DEBUG(0,("Invalid SMB packet: next_command: 0x%08X\n",
 239                          next_command_ofs));
 240                 return NT_STATUS_INVALID_PARAMETER;
 241         }
 242
 243         req = smbd_smb2_request_allocate(sconn);
 244         if (req == NULL) {
 245                 return NT_STATUS_NO_MEMORY;
 246         }
 247         req->sconn = sconn;
 248
 249         talloc_steal(req, inbuf);
 250
 251         req->in.vector = talloc_array(req, struct iovec, 4);
 252         if (req->in.vector == NULL) {
 253                 TALLOC_FREE(req);
 254                 return NT_STATUS_NO_MEMORY;
 255         }
 256         req->in.vector_count = 4;
 257
 258         memcpy(req->in.nbt_hdr, inbuf, 4);
 259
 260         ofs = 0;
 261         req->in.vector[0].iov_base      = (void *)req->in.nbt_hdr;
 262         req->in.vector[0].iov_len       = 4;
 263         ofs += req->in.vector[0].iov_len;
 264
 265         req->in.vector[1].iov_base      = (void *)(inbuf + ofs);
 266         req->in.vector[1].iov_len       = SMB2_HDR_BODY;
 267         ofs += req->in.vector[1].iov_len;
 268
 269         req->in.vector[2].iov_base      = (void *)(inbuf + ofs);
 270         req->in.vector[2].iov_len       = SVAL(inbuf, ofs) & 0xFFFE;
 271         ofs += req->in.vector[2].iov_len;
 272
 273         if (ofs > size) {
 274                 return NT_STATUS_INVALID_PARAMETER;
 275         }
 276
 277         req->in.vector[3].iov_base      = (void *)(inbuf + ofs);
 278         req->in.vector[3].iov_len       = size - ofs;
 279         ofs += req->in.vector[3].iov_len;
 280
 281         req->current_idx = 1;
 282
 283         *_req = req;
 284         return NT_STATUS_OK;
 285 }
 286
 287 static NTSTATUS smbd_smb2_request_validate(struct smbd_smb2_request *req,
 288                                 uint16_t *p_creds_requested)
 289 {
 290         int count;
 291         int idx;
 292         bool compound_related = false;
 293
 294         *p_creds_requested = 0;
 295         count = req->in.vector_count;
 296
 297         if (count < 4) {
 298                 /* It's not a SMB2 request */
 299                 return NT_STATUS_INVALID_PARAMETER;
 300         }
 301
 302         for (idx=1; idx < count; idx += 3) {
 303                 uint16_t creds_requested = 0;
 304                 const uint8_t *inhdr = NULL;
 305                 uint32_t flags;
 306
 307                 if (req->in.vector[idx].iov_len != SMB2_HDR_BODY) {
 308                         return NT_STATUS_INVALID_PARAMETER;
 309                 }
 310
 311                 if (req->in.vector[idx+1].iov_len < 2) {
 312                         return NT_STATUS_INVALID_PARAMETER;
 313                 }
 314
 315                 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
 316
 317                 /* setup the SMB2 header */
 318                 if (IVAL(inhdr, SMB2_HDR_PROTOCOL_ID) != SMB2_MAGIC) {
 319                         return NT_STATUS_INVALID_PARAMETER;
 320                 }
 321
 322                 creds_requested = SVAL(inhdr, SMB2_HDR_CREDIT);
 323                 if (*p_creds_requested + creds_requested < creds_requested) {
 324                         *p_creds_requested = 65535;
 325                 } else {
 326                         *p_creds_requested += creds_requested;
 327                 }
 328
 329                 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
 330                 if (idx == 1) {
 331                         /*
 332                          * the 1st request should never have the
 333                          * SMB2_HDR_FLAG_CHAINED flag set
 334                          */
 335                         if (flags & SMB2_HDR_FLAG_CHAINED) {
 336                                 req->next_status = NT_STATUS_INVALID_PARAMETER;
 337                                 return NT_STATUS_OK;
 338                         }
 339                 } else if (idx == 4) {
 340                         /*
 341                          * the 2nd request triggers related vs. unrelated
 342                          * compounded requests
 343                          */
 344                         if (flags & SMB2_HDR_FLAG_CHAINED) {
 345                                 compound_related = true;
 346                         }
 347                 } else if (idx > 4) {
 348 #if 0
 349                         /*
 350                          * It seems the this tests are wrong
 351                          * see the SMB2-COMPOUND test
 352                          */
 353
 354                         /*
 355                          * all other requests should match the 2nd one
 356                          */
 357                         if (flags & SMB2_HDR_FLAG_CHAINED) {
 358                                 if (!compound_related) {
 359                                         req->next_status =
 360                                                 NT_STATUS_INVALID_PARAMETER;
 361                                         return NT_STATUS_OK;
 362                                 }
 363                         } else {
 364                                 if (compound_related) {
 365                                         req->next_status =
 366                                                 NT_STATUS_INVALID_PARAMETER;
 367                                         return NT_STATUS_OK;
 368                                 }
 369                         }
 370 #endif
 371                 }
 372         }
 373
 374         return NT_STATUS_OK;
 375 }
 376
 377 static NTSTATUS smbd_smb2_request_setup_out(struct smbd_smb2_request *req, uint16_t creds)
 378 {
 379         struct iovec *vector;
 380         int count;
 381         int idx;
 382
 383         count = req->in.vector_count;
 384         vector = talloc_zero_array(req, struct iovec, count);
 385         if (vector == NULL) {
 386                 return NT_STATUS_NO_MEMORY;
 387         }
 388
 389         vector[0].iov_base      = req->out.nbt_hdr;
 390         vector[0].iov_len       = 4;
 391         SIVAL(req->out.nbt_hdr, 0, 0);
 392
 393         for (idx=1; idx < count; idx += 3) {
 394                 const uint8_t *inhdr = NULL;
 395                 uint32_t in_flags;
 396                 uint8_t *outhdr = NULL;
 397                 uint8_t *outbody = NULL;
 398                 uint32_t next_command_ofs = 0;
 399                 struct iovec *current = &vector[idx];
 400
 401                 if ((idx + 3) < count) {
 402                         /* we have a next command -
 403                          * setup for the error case. */
 404                         next_command_ofs = SMB2_HDR_BODY + 9;
 405                 }
 406
 407                 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
 408                 in_flags = IVAL(inhdr, SMB2_HDR_FLAGS);
 409
 410                 outhdr = talloc_zero_array(vector, uint8_t,
 411                                       OUTVEC_ALLOC_SIZE);
 412                 if (outhdr == NULL) {
 413                         return NT_STATUS_NO_MEMORY;
 414                 }
 415
 416                 outbody = outhdr + SMB2_HDR_BODY;
 417
 418                 current[0].iov_base     = (void *)outhdr;
 419                 current[0].iov_len      = SMB2_HDR_BODY;
 420
 421                 current[1].iov_base     = (void *)outbody;
 422                 current[1].iov_len      = 8;
 423
 424                 current[2].iov_base     = NULL;
 425                 current[2].iov_len      = 0;
 426
 427                 /* setup the SMB2 header */
 428                 SIVAL(outhdr, SMB2_HDR_PROTOCOL_ID,     SMB2_MAGIC);
 429                 SSVAL(outhdr, SMB2_HDR_LENGTH,          SMB2_HDR_BODY);
 430                 SSVAL(outhdr, SMB2_HDR_EPOCH,           0);
 431                 SIVAL(outhdr, SMB2_HDR_STATUS,
 432                       NT_STATUS_V(NT_STATUS_INTERNAL_ERROR));
 433                 SSVAL(outhdr, SMB2_HDR_OPCODE,
 434                       SVAL(inhdr, SMB2_HDR_OPCODE));
 435                 SSVAL(outhdr, SMB2_HDR_CREDIT,          creds);
 436
 437                 /* Remember what we gave out. */
 438                 req->sconn->smb2.credits_granted += creds;
 439
 440                 SIVAL(outhdr, SMB2_HDR_FLAGS,
 441                       IVAL(inhdr, SMB2_HDR_FLAGS) | SMB2_HDR_FLAG_REDIRECT);
 442                 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND,    next_command_ofs);
 443                 SBVAL(outhdr, SMB2_HDR_MESSAGE_ID,
 444                       BVAL(inhdr, SMB2_HDR_MESSAGE_ID));
 445                 SIVAL(outhdr, SMB2_HDR_PID,
 446                       IVAL(inhdr, SMB2_HDR_PID));
 447                 SIVAL(outhdr, SMB2_HDR_TID,
 448                       IVAL(inhdr, SMB2_HDR_TID));
 449                 SBVAL(outhdr, SMB2_HDR_SESSION_ID,
 450                       BVAL(inhdr, SMB2_HDR_SESSION_ID));
 451                 memset(outhdr + SMB2_HDR_SIGNATURE, 0, 16);
 452
 453                 /* setup error body header */
 454                 SSVAL(outbody, 0x00, 0x08 + 1);
 455                 SSVAL(outbody, 0x02, 0);
 456                 SIVAL(outbody, 0x04, 0);
 457         }
 458
 459         req->out.vector = vector;
 460         req->out.vector_count = count;
 461
 462         /* setup the length of the NBT packet */
 463         smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
 464
 465         DLIST_ADD_END(req->sconn->smb2.requests, req, struct smbd_smb2_request *);
 466
 467         return NT_STATUS_OK;
 468 }
 469
 470 void smbd_server_connection_terminate_ex(struct smbd_server_connection *sconn,
 471                                          const char *reason,
 472                                          const char *location)
 473 {
 474         DEBUG(10,("smbd_server_connection_terminate_ex: reason[%s] at %s\n",
 475                   reason, location));
 476         exit_server_cleanly(reason);
 477 }
 478
 479 static bool dup_smb2_vec(struct iovec *dstvec,
 480                         const struct iovec *srcvec,
 481                         int offset)
 482 {
 483
 484         if (srcvec[offset].iov_len &&
 485                         srcvec[offset].iov_base) {
 486                 dstvec[offset].iov_base = talloc_memdup(dstvec,
 487                                         srcvec[offset].iov_base,
 488                                         srcvec[offset].iov_len);
 489                 if (!dstvec[offset].iov_base) {
 490                         return false;
 491                 }
 492                 dstvec[offset].iov_len = srcvec[offset].iov_len;
 493         } else {
 494                 dstvec[offset].iov_base = NULL;
 495                 dstvec[offset].iov_len = 0;
 496         }
 497         return true;
 498 }
 499
 500 static struct smbd_smb2_request *dup_smb2_req(const struct smbd_smb2_request *req)
 501 {
 502         struct smbd_smb2_request *newreq = NULL;
 503         struct iovec *outvec = NULL;
 504         int count = req->out.vector_count;
 505         int i;
 506
 507         newreq = smbd_smb2_request_allocate(req->sconn);
 508         if (!newreq) {
 509                 return NULL;
 510         }
 511
 512         newreq->sconn = req->sconn;
 513         newreq->do_signing = req->do_signing;
 514         newreq->current_idx = req->current_idx;
 515         newreq->async = false;
 516         newreq->cancelled = false;
 517
 518         outvec = talloc_zero_array(newreq, struct iovec, count);
 519         if (!outvec) {
 520                 TALLOC_FREE(newreq);
 521                 return NULL;
 522         }
 523         newreq->out.vector = outvec;
 524         newreq->out.vector_count = count;
 525
 526         /* Setup the outvec's identically to req. */
 527         outvec[0].iov_base = newreq->out.nbt_hdr;
 528         outvec[0].iov_len = 4;
 529         memcpy(newreq->out.nbt_hdr, req->out.nbt_hdr, 4);
 530
 531         for (i = 1; i < count; i += 3) {
 532                 /* i + 0 and i + 1 are always
 533                  * boilerplate. */
 534                 outvec[i].iov_base = talloc_memdup(outvec,
 535                                                 req->out.vector[i].iov_base,
 536                                                 OUTVEC_ALLOC_SIZE);
 537                 if (!outvec[i].iov_base) {
 538                         break;
 539                 }
 540                 outvec[i].iov_len = SMB2_HDR_BODY;
 541
 542                 outvec[i+1].iov_base = ((uint8_t *)outvec[i].iov_base) +
 543                                                 SMB2_HDR_BODY;
 544                 outvec[i+1].iov_len = 8;
 545
 546                 if (req->out.vector[i+2].iov_base ==
 547                                 ((uint8_t *)req->out.vector[i].iov_base) +
 548                                         (OUTVEC_ALLOC_SIZE - 1) &&
 549                                 req->out.vector[i+2].iov_len == 1) {
 550                         /* Common SMB2 error packet case. */
 551                         outvec[i+2].iov_base = ((uint8_t *)outvec[i].iov_base) +
 552                                 (OUTVEC_ALLOC_SIZE - 1);
 553                         outvec[i+2].iov_len = 1;
 554                 } else if (!dup_smb2_vec(outvec,
 555                                 req->out.vector,
 556                                 i)) {
 557                         break;
 558                 }
 559         }
 560
 561         if (i < count) {
 562                 /* Alloc failed. */
 563                 TALLOC_FREE(newreq);
 564                 return NULL;
 565         }
 566
 567         smb2_setup_nbt_length(newreq->out.vector,
 568                 newreq->out.vector_count);
 569
 570         return newreq;
 571 }
 572
 573 static void smbd_smb2_request_writev_done(struct tevent_req *subreq);
 574
 575 static NTSTATUS smb2_send_async_interim_response(const struct smbd_smb2_request *req)
 576 {
 577         int i = 0;
 578         uint8_t *outhdr = NULL;
 579         struct smbd_smb2_request *nreq = NULL;
 580
 581         /* Create a new smb2 request we'll use
 582            for the interim return. */
 583         nreq = dup_smb2_req(req);
 584         if (!nreq) {
 585                 return NT_STATUS_NO_MEMORY;
 586         }
 587
 588         /* Lose the last 3 out vectors. They're the
 589            ones we'll be using for the async reply. */
 590         nreq->out.vector_count -= 3;
 591
 592         smb2_setup_nbt_length(nreq->out.vector,
 593                 nreq->out.vector_count);
 594
 595         /* Step back to the previous reply. */
 596         i = nreq->current_idx - 3;
 597         outhdr = (uint8_t *)nreq->out.vector[i].iov_base;
 598         /* And end the chain. */
 599         SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, 0);
 600
 601         /* Re-sign if needed. */
 602         if (nreq->do_signing) {
 603                 NTSTATUS status;
 604                 status = smb2_signing_sign_pdu(nreq->session->session_key,
 605                                         &nreq->out.vector[i], 3);
 606                 if (!NT_STATUS_IS_OK(status)) {
 607                         return status;
 608                 }
 609         }
 610         if (DEBUGLEVEL >= 10) {
 611                 dbgtext("smb2_send_async_interim_response: nreq->current_idx = %u\n",
 612                         (unsigned int)nreq->current_idx );
 613                 dbgtext("smb2_send_async_interim_response: returning %u vectors\n",
 614                         (unsigned int)nreq->out.vector_count );
 615                 print_req_vectors(nreq);
 616         }
 617         nreq->subreq = tstream_writev_queue_send(nreq,
 618                                         nreq->sconn->smb2.event_ctx,
 619                                         nreq->sconn->smb2.stream,
 620                                         nreq->sconn->smb2.send_queue,
 621                                         nreq->out.vector,
 622                                         nreq->out.vector_count);
 623
 624         if (nreq->subreq == NULL) {
 625                 return NT_STATUS_NO_MEMORY;
 626         }
 627
 628         tevent_req_set_callback(nreq->subreq,
 629                         smbd_smb2_request_writev_done,
 630                         nreq);
 631
 632         return NT_STATUS_OK;
 633 }
 634
 635 struct smbd_smb2_request_pending_state {
 636         struct smbd_server_connection *sconn;
 637         uint8_t buf[4 + SMB2_HDR_BODY + 0x08 + 1];
 638         struct iovec vector[3];
 639 };
 640
 641 static void smbd_smb2_request_pending_writev_done(struct tevent_req *subreq)
 642 {
 643         struct smbd_smb2_request_pending_state *state =
 644                 tevent_req_callback_data(subreq,
 645                         struct smbd_smb2_request_pending_state);
 646         struct smbd_server_connection *sconn = state->sconn;
 647         int ret;
 648         int sys_errno;
 649
 650         ret = tstream_writev_queue_recv(subreq, &sys_errno);
 651         TALLOC_FREE(subreq);
 652         if (ret == -1) {
 653                 NTSTATUS status = map_nt_error_from_unix(sys_errno);
 654                 smbd_server_connection_terminate(sconn, nt_errstr(status));
 655                 return;
 656         }
 657
 658         TALLOC_FREE(state);
 659 }
 660
 661 NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req,
 662                                          struct tevent_req *subreq)
 663 {
 664         NTSTATUS status;
 665         struct smbd_smb2_request_pending_state *state = NULL;
 666         int i = req->current_idx;
 667         uint8_t *reqhdr = NULL;
 668         uint8_t *hdr = NULL;
 669         uint8_t *body = NULL;
 670         uint32_t flags = 0;
 671         uint64_t message_id = 0;
 672         uint64_t async_id = 0;
 673         struct iovec *outvec = NULL;
 674
 675         if (!tevent_req_is_in_progress(subreq)) {
 676                 return NT_STATUS_OK;
 677         }
 678
 679         if (req->async) {
 680                 /* We're already async. */
 681                 return NT_STATUS_OK;
 682         }
 683
 684         if (req->in.vector_count > i + 3) {
 685                 /*
 686                  * We're trying to go async in a compound
 687                  * request chain. This is not allowed.
 688                  * Cancel the outstanding request.
 689                  */
 690                 tevent_req_cancel(subreq);
 691                 return smbd_smb2_request_error(req,
 692                         NT_STATUS_INSUFFICIENT_RESOURCES);
 693         }
 694
 695         req->subreq = subreq;
 696         subreq = NULL;
 697
 698         if (DEBUGLEVEL >= 10) {
 699                 dbgtext("smbd_smb2_request_pending_queue: req->current_idx = %u\n",
 700                         (unsigned int)req->current_idx );
 701                 print_req_vectors(req);
 702         }
 703
 704         if (req->out.vector_count > 4) {
 705                 /* This is a compound reply. We
 706                  * must do an interim response
 707                  * followed by the async response
 708                  * to match W2K8R2.
 709                  */
 710                 status = smb2_send_async_interim_response(req);
 711                 if (!NT_STATUS_IS_OK(status)) {
 712                         return status;
 713                 }
 714         }
 715
 716         /* Don't return an intermediate packet on a pipe read/write. */
 717         if (req->tcon && req->tcon->compat_conn && IS_IPC(req->tcon->compat_conn)) {
 718                 return NT_STATUS_OK;
 719         }
 720
 721         reqhdr = (uint8_t *)req->out.vector[i].iov_base;
 722         flags = (IVAL(reqhdr, SMB2_HDR_FLAGS) & ~SMB2_HDR_FLAG_CHAINED);
 723         message_id = BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
 724         async_id = message_id; /* keep it simple for now... */
 725
 726         /*
 727          * What we send is identical to a smbd_smb2_request_error
 728          * packet with an error status of STATUS_PENDING. Make use
 729          * of this fact sometime when refactoring. JRA.
 730          */
 731
 732         state = talloc_zero(req->sconn, struct smbd_smb2_request_pending_state);
 733         if (state == NULL) {
 734                 return NT_STATUS_NO_MEMORY;
 735         }
 736         state->sconn = req->sconn;
 737
 738         state->vector[0].iov_base = (void *)state->buf;
 739         state->vector[0].iov_len = 4;
 740
 741         state->vector[1].iov_base = state->buf + 4;
 742         state->vector[1].iov_len = SMB2_HDR_BODY;
 743
 744         state->vector[2].iov_base = state->buf + 4 + SMB2_HDR_BODY;
 745         state->vector[2].iov_len = 9;
 746
 747         smb2_setup_nbt_length(state->vector, 3);
 748
 749         hdr = (uint8_t *)state->vector[1].iov_base;
 750         body = (uint8_t *)state->vector[2].iov_base;
 751
 752         SIVAL(hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
 753         SSVAL(hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
 754         SSVAL(hdr, SMB2_HDR_EPOCH, 0);
 755         SIVAL(hdr, SMB2_HDR_STATUS, NT_STATUS_V(STATUS_PENDING));
 756         SSVAL(hdr, SMB2_HDR_OPCODE, SVAL(reqhdr, SMB2_HDR_OPCODE));
 757         SSVAL(hdr, SMB2_HDR_CREDIT, 5);
 758
 759         req->sconn->smb2.credits_granted += 5;
 760
 761         SIVAL(hdr, SMB2_HDR_FLAGS, flags | SMB2_HDR_FLAG_ASYNC);
 762         SIVAL(hdr, SMB2_HDR_NEXT_COMMAND, 0);
 763         SBVAL(hdr, SMB2_HDR_MESSAGE_ID, message_id);
 764         SBVAL(hdr, SMB2_HDR_PID, async_id);
 765         SBVAL(hdr, SMB2_HDR_SESSION_ID,
 766                 BVAL(reqhdr, SMB2_HDR_SESSION_ID));
 767         memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
 768
 769         SSVAL(body, 0x00, 0x08 + 1);
 770
 771         SCVAL(body, 0x02, 0);
 772         SCVAL(body, 0x03, 0);
 773         SIVAL(body, 0x04, 0);
 774         /* Match W2K8R2... */
 775         SCVAL(body, 0x08, 0x21);
 776
 777         if (req->do_signing) {
 778                 status = smb2_signing_sign_pdu(req->session->session_key,
 779                                         state->vector, 3);
 780                 if (!NT_STATUS_IS_OK(status)) {
 781                         return status;
 782                 }
 783         }
 784
 785         subreq = tstream_writev_queue_send(state,
 786                                         req->sconn->smb2.event_ctx,
 787                                         req->sconn->smb2.stream,
 788                                         req->sconn->smb2.send_queue,
 789                                         state->vector,
 790                                         3);
 791
 792         if (subreq == NULL) {
 793                 return NT_STATUS_NO_MEMORY;
 794         }
 795
 796         tevent_req_set_callback(subreq,
 797                         smbd_smb2_request_pending_writev_done,
 798                         state);
 799
 800         /* Note we're going async with this request. */
 801         req->async = true;
 802
 803         /*
 804          * Now manipulate req so that the outstanding async request
 805          * is the only one left in the struct smbd_smb2_request.
 806          */
 807
 808         if (req->current_idx == 1) {
 809                 /* There was only one. */
 810                 goto out;
 811         }
 812
 813         /* Re-arrange the in.vectors. */
 814         req->in.vector[1] = req->in.vector[i];
 815         req->in.vector[2] = req->in.vector[i+1];
 816         req->in.vector[3] = req->in.vector[i+2];
 817         req->in.vector_count = 4;
 818         /* Reset the new in size. */
 819         smb2_setup_nbt_length(req->in.vector, 4);
 820
 821         /* Now recreate the out.vectors. */
 822         outvec = talloc_zero_array(req, struct iovec, 4);
 823         if (!outvec) {
 824                 return NT_STATUS_NO_MEMORY;
 825         }
 826         outvec[0].iov_base = req->out.nbt_hdr;
 827         outvec[0].iov_len = 4;
 828         SIVAL(req->out.nbt_hdr, 0, 0);
 829
 830         outvec[1].iov_base = talloc_memdup(outvec,
 831                                 req->out.vector[i].iov_base,
 832                                 OUTVEC_ALLOC_SIZE);
 833         if (!outvec[1].iov_base) {
 834                 return NT_STATUS_NO_MEMORY;
 835         }
 836         outvec[1].iov_len = SMB2_HDR_BODY;
 837
 838         outvec[2].iov_base = ((uint8_t *)outvec[1].iov_base) +
 839                                 SMB2_HDR_BODY;
 840         outvec[2].iov_len = 8;
 841
 842         if (req->out.vector[i+2].iov_base &&
 843                         req->out.vector[i+2].iov_len) {
 844                 if (req->out.vector[i+2].iov_base ==
 845                                 ((uint8_t *)req->out.vector[i].iov_base) +
 846                                         (OUTVEC_ALLOC_SIZE - 1) &&
 847                                 req->out.vector[i].iov_len == 1) {
 848                         /* Common SMB2 error packet case. */
 849                         outvec[3].iov_base = ((uint8_t *)outvec[1].iov_base) +
 850                                 (OUTVEC_ALLOC_SIZE - 1);
 851                 } else {
 852                         outvec[3].iov_base = talloc_memdup(outvec,
 853                                         req->out.vector[i+2].iov_base,
 854                                         req->out.vector[i+2].iov_len);
 855                         if (!outvec[3].iov_base) {
 856                                 return NT_STATUS_NO_MEMORY;
 857                         }
 858                 }
 859                 outvec[3].iov_len = req->out.vector[i+2].iov_len;
 860         } else {
 861                 outvec[3].iov_base = NULL;
 862                 outvec[3].iov_len = 0;
 863         }
 864
 865         TALLOC_FREE(req->out.vector);
 866
 867         req->out.vector = outvec;
 868
 869         req->current_idx = 1;
 870         req->out.vector_count = 4;
 871
 872   out:
 873
 874         smb2_setup_nbt_length(req->out.vector,
 875                 req->out.vector_count);
 876
 877         /* Ensure our final reply matches the interim one. */
 878         reqhdr = (uint8_t *)req->out.vector[1].iov_base;
 879         SIVAL(reqhdr, SMB2_HDR_FLAGS, flags | SMB2_HDR_FLAG_ASYNC);
 880         SBVAL(reqhdr, SMB2_HDR_PID, async_id);
 881
 882         {
 883                 const uint8_t *inhdr =
 884                         (const uint8_t *)req->in.vector[1].iov_base;
 885                 DEBUG(10,("smbd_smb2_request_pending_queue: opcode[%s] mid %llu "
 886                         "going async\n",
 887                         smb2_opcode_name((uint16_t)IVAL(inhdr, SMB2_HDR_OPCODE)),
 888                         (unsigned long long)async_id ));
 889         }
 890         return NT_STATUS_OK;
 891 }
 892
 893 static NTSTATUS smbd_smb2_request_process_cancel(struct smbd_smb2_request *req)
 894 {
 895         struct smbd_server_connection *sconn = req->sconn;
 896         struct smbd_smb2_request *cur;
 897         const uint8_t *inhdr;
 898         int i = req->current_idx;
 899         uint32_t flags;
 900         uint64_t search_message_id;
 901         uint64_t search_async_id;
 902         uint64_t found_id;
 903
 904         inhdr = (const uint8_t *)req->in.vector[i].iov_base;
 905
 906         flags = IVAL(inhdr, SMB2_HDR_FLAGS);
 907         search_message_id = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
 908         search_async_id = BVAL(inhdr, SMB2_HDR_PID);
 909
 910         /*
 911          * we don't need the request anymore
 912          * cancel requests never have a response
 913          */
 914         DLIST_REMOVE(req->sconn->smb2.requests, req);
 915         TALLOC_FREE(req);
 916
 917         for (cur = sconn->smb2.requests; cur; cur = cur->next) {
 918                 const uint8_t *outhdr;
 919                 uint64_t message_id;
 920                 uint64_t async_id;
 921
 922                 i = cur->current_idx;
 923
 924                 outhdr = (const uint8_t *)cur->out.vector[i].iov_base;
 925
 926                 message_id = BVAL(outhdr, SMB2_HDR_MESSAGE_ID);
 927                 async_id = BVAL(outhdr, SMB2_HDR_PID);
 928
 929                 if (flags & SMB2_HDR_FLAG_ASYNC) {
 930                         if (search_async_id == async_id) {
 931                                 found_id = async_id;
 932                                 break;
 933                         }
 934                 } else {
 935                         if (search_message_id == message_id) {
 936                                 found_id = message_id;
 937                                 break;
 938                         }
 939                 }
 940         }
 941
 942         if (cur && cur->subreq) {
 943                 inhdr = (const uint8_t *)cur->in.vector[i].iov_base;
 944                 DEBUG(10,("smbd_smb2_request_process_cancel: attempting to "
 945                         "cancel opcode[%s] mid %llu\n",
 946                         smb2_opcode_name((uint16_t)IVAL(inhdr, SMB2_HDR_OPCODE)),
 947                         (unsigned long long)found_id ));
 948                 tevent_req_cancel(cur->subreq);
 949         }
 950
 951         return NT_STATUS_OK;
 952 }
 953
 954 NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req)
 955 {
 956         const uint8_t *inhdr;
 957         int i = req->current_idx;
 958         uint16_t opcode;
 959         uint32_t flags;
 960         uint64_t mid;
 961         NTSTATUS status;
 962         NTSTATUS session_status;
 963         uint32_t allowed_flags;
 964
 965         inhdr = (const uint8_t *)req->in.vector[i].iov_base;
 966
 967         /* TODO: verify more things */
 968
 969         flags = IVAL(inhdr, SMB2_HDR_FLAGS);
 970         opcode = IVAL(inhdr, SMB2_HDR_OPCODE);
 971         mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
 972         DEBUG(10,("smbd_smb2_request_dispatch: opcode[%s] mid = %llu\n",
 973                 smb2_opcode_name(opcode),
 974                 (unsigned long long)mid));
 975
 976         allowed_flags = SMB2_HDR_FLAG_CHAINED |
 977                         SMB2_HDR_FLAG_SIGNED |
 978                         SMB2_HDR_FLAG_DFS;
 979         if (opcode == SMB2_OP_CANCEL) {
 980                 allowed_flags |= SMB2_HDR_FLAG_ASYNC;
 981         }
 982         if ((flags & ~allowed_flags) != 0) {
 983                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
 984         }
 985
 986         session_status = smbd_smb2_request_check_session(req);
 987
 988         req->do_signing = false;
 989         if (flags & SMB2_HDR_FLAG_SIGNED) {
 990                 if (!NT_STATUS_IS_OK(session_status)) {
 991                         return smbd_smb2_request_error(req, session_status);
 992                 }
 993
 994                 req->do_signing = true;
 995                 status = smb2_signing_check_pdu(req->session->session_key,
 996                                                 &req->in.vector[i], 3);
 997                 if (!NT_STATUS_IS_OK(status)) {
 998                         return smbd_smb2_request_error(req, status);
 999                 }
1000         } else if (req->session && req->session->do_signing) {
1001                 return smbd_smb2_request_error(req, NT_STATUS_ACCESS_DENIED);
1002         }
1003
1004         if (flags & SMB2_HDR_FLAG_CHAINED) {
1005                 /*
1006                  * This check is mostly for giving the correct error code
1007                  * for compounded requests.
1008                  *
1009                  * TODO: we may need to move this after the session
1010                  *       and tcon checks.
1011                  */
1012                 if (!NT_STATUS_IS_OK(req->next_status)) {
1013                         return smbd_smb2_request_error(req, req->next_status);
1014                 }
1015         } else {
1016                 req->compat_chain_fsp = NULL;
1017         }
1018
1019         switch (opcode) {
1020         case SMB2_OP_NEGPROT:
1021                 return smbd_smb2_request_process_negprot(req);
1022
1023         case SMB2_OP_SESSSETUP:
1024                 return smbd_smb2_request_process_sesssetup(req);
1025
1026         case SMB2_OP_LOGOFF:
1027                 if (!NT_STATUS_IS_OK(session_status)) {
1028                         return smbd_smb2_request_error(req, session_status);
1029                 }
1030                 return smbd_smb2_request_process_logoff(req);
1031
1032         case SMB2_OP_TCON:
1033                 if (!NT_STATUS_IS_OK(session_status)) {
1034                         return smbd_smb2_request_error(req, session_status);
1035                 }
1036                 status = smbd_smb2_request_check_session(req);
1037                 if (!NT_STATUS_IS_OK(status)) {
1038                         return smbd_smb2_request_error(req, status);
1039                 }
1040                 return smbd_smb2_request_process_tcon(req);
1041
1042         case SMB2_OP_TDIS:
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_tdis(req);
1051
1052         case SMB2_OP_CREATE:
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_create(req);
1061
1062         case SMB2_OP_CLOSE:
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_close(req);
1071
1072         case SMB2_OP_FLUSH:
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_flush(req);
1081
1082         case SMB2_OP_READ:
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_read(req);
1091
1092         case SMB2_OP_WRITE:
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_write(req);
1101
1102         case SMB2_OP_LOCK:
1103                 if (!NT_STATUS_IS_OK(session_status)) {
1104                         /* Too ugly to live ? JRA. */
1105                         if (NT_STATUS_EQUAL(session_status,NT_STATUS_USER_SESSION_DELETED)) {
1106                                 session_status = NT_STATUS_FILE_CLOSED;
1107                         }
1108                         return smbd_smb2_request_error(req, session_status);
1109                 }
1110                 status = smbd_smb2_request_check_tcon(req);
1111                 if (!NT_STATUS_IS_OK(status)) {
1112                         /* Too ugly to live ? JRA. */
1113                         if (NT_STATUS_EQUAL(status,NT_STATUS_NETWORK_NAME_DELETED)) {
1114                                 status = NT_STATUS_FILE_CLOSED;
1115                         }
1116                         return smbd_smb2_request_error(req, status);
1117                 }
1118                 return smbd_smb2_request_process_lock(req);
1119
1120         case SMB2_OP_IOCTL:
1121                 if (!NT_STATUS_IS_OK(session_status)) {
1122                         return smbd_smb2_request_error(req, session_status);
1123                 }
1124                 status = smbd_smb2_request_check_tcon(req);
1125                 if (!NT_STATUS_IS_OK(status)) {
1126                         return smbd_smb2_request_error(req, status);
1127                 }
1128                 return smbd_smb2_request_process_ioctl(req);
1129
1130         case SMB2_OP_CANCEL:
1131                 return smbd_smb2_request_process_cancel(req);
1132
1133         case SMB2_OP_KEEPALIVE:
1134                 return smbd_smb2_request_process_keepalive(req);
1135
1136         case SMB2_OP_FIND:
1137                 if (!NT_STATUS_IS_OK(session_status)) {
1138                         return smbd_smb2_request_error(req, session_status);
1139                 }
1140                 status = smbd_smb2_request_check_tcon(req);
1141                 if (!NT_STATUS_IS_OK(status)) {
1142                         return smbd_smb2_request_error(req, status);
1143                 }
1144                 return smbd_smb2_request_process_find(req);
1145
1146         case SMB2_OP_NOTIFY:
1147                 if (!NT_STATUS_IS_OK(session_status)) {
1148                         return smbd_smb2_request_error(req, session_status);
1149                 }
1150                 status = smbd_smb2_request_check_tcon(req);
1151                 if (!NT_STATUS_IS_OK(status)) {
1152                         return smbd_smb2_request_error(req, status);
1153                 }
1154                 return smbd_smb2_request_process_notify(req);
1155
1156         case SMB2_OP_GETINFO:
1157                 if (!NT_STATUS_IS_OK(session_status)) {
1158                         return smbd_smb2_request_error(req, session_status);
1159                 }
1160                 status = smbd_smb2_request_check_tcon(req);
1161                 if (!NT_STATUS_IS_OK(status)) {
1162                         return smbd_smb2_request_error(req, status);
1163                 }
1164                 return smbd_smb2_request_process_getinfo(req);
1165
1166         case SMB2_OP_SETINFO:
1167                 if (!NT_STATUS_IS_OK(session_status)) {
1168                         return smbd_smb2_request_error(req, session_status);
1169                 }
1170                 status = smbd_smb2_request_check_tcon(req);
1171                 if (!NT_STATUS_IS_OK(status)) {
1172                         return smbd_smb2_request_error(req, status);
1173                 }
1174                 return smbd_smb2_request_process_setinfo(req);
1175
1176         case SMB2_OP_BREAK:
1177                 if (!NT_STATUS_IS_OK(session_status)) {
1178                         return smbd_smb2_request_error(req, session_status);
1179                 }
1180                 status = smbd_smb2_request_check_tcon(req);
1181                 if (!NT_STATUS_IS_OK(status)) {
1182                         return smbd_smb2_request_error(req, status);
1183                 }
1184                 return smbd_smb2_request_process_break(req);
1185         }
1186
1187         return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
1188 }
1189
1190 static NTSTATUS smbd_smb2_request_reply(struct smbd_smb2_request *req)
1191 {
1192         struct tevent_req *subreq;
1193
1194         req->subreq = NULL;
1195
1196         smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
1197
1198         if (req->do_signing) {
1199                 int i = req->current_idx;
1200                 NTSTATUS status;
1201                 status = smb2_signing_sign_pdu(req->session->session_key,
1202                                                &req->out.vector[i], 3);
1203                 if (!NT_STATUS_IS_OK(status)) {
1204                         return status;
1205                 }
1206         }
1207
1208         req->current_idx += 3;
1209
1210         if (req->current_idx < req->out.vector_count) {
1211                 /*
1212                  * We must process the remaining compound
1213                  * SMB2 requests before any new incoming SMB2
1214                  * requests. This is because incoming SMB2
1215                  * requests may include a cancel for a
1216                  * compound request we haven't processed
1217                  * yet.
1218                  */
1219                 struct tevent_immediate *im = tevent_create_immediate(req);
1220                 if (!im) {
1221                         return NT_STATUS_NO_MEMORY;
1222                 }
1223                 tevent_schedule_immediate(im,
1224                                         req->sconn->smb2.event_ctx,
1225                                         smbd_smb2_request_dispatch_immediate,
1226                                         req);
1227                 return NT_STATUS_OK;
1228         }
1229
1230         if (DEBUGLEVEL >= 10) {
1231                 dbgtext("smbd_smb2_request_reply: sending...\n");
1232                 print_req_vectors(req);
1233         }
1234
1235         subreq = tstream_writev_queue_send(req,
1236                                            req->sconn->smb2.event_ctx,
1237                                            req->sconn->smb2.stream,
1238                                            req->sconn->smb2.send_queue,
1239                                            req->out.vector,
1240                                            req->out.vector_count);
1241         if (subreq == NULL) {
1242                 return NT_STATUS_NO_MEMORY;
1243         }
1244         tevent_req_set_callback(subreq, smbd_smb2_request_writev_done, req);
1245         /*
1246          * We're done with this request -
1247          * move it off the "being processed" queue.
1248          */
1249         DLIST_REMOVE(req->sconn->smb2.requests, req);
1250
1251         return NT_STATUS_OK;
1252 }
1253
1254 void smbd_smb2_request_dispatch_immediate(struct tevent_context *ctx,
1255                                         struct tevent_immediate *im,
1256                                         void *private_data)
1257 {
1258         struct smbd_smb2_request *req = talloc_get_type_abort(private_data,
1259                                         struct smbd_smb2_request);
1260         struct smbd_server_connection *sconn = req->sconn;
1261         NTSTATUS status;
1262
1263         TALLOC_FREE(im);
1264
1265         if (DEBUGLEVEL >= 10) {
1266                 DEBUG(10,("smbd_smb2_request_dispatch_immediate: idx[%d] of %d vectors\n",
1267                         req->current_idx, req->in.vector_count));
1268                 print_req_vectors(req);
1269         }
1270
1271         status = smbd_smb2_request_dispatch(req);
1272         if (!NT_STATUS_IS_OK(status)) {
1273                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1274                 return;
1275         }
1276 }
1277
1278 static void smbd_smb2_request_writev_done(struct tevent_req *subreq)
1279 {
1280         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
1281                                         struct smbd_smb2_request);
1282         struct smbd_server_connection *sconn = req->sconn;
1283         int ret;
1284         int sys_errno;
1285
1286         ret = tstream_writev_queue_recv(subreq, &sys_errno);
1287         TALLOC_FREE(subreq);
1288         TALLOC_FREE(req);
1289         if (ret == -1) {
1290                 NTSTATUS status = map_nt_error_from_unix(sys_errno);
1291                 DEBUG(2,("smbd_smb2_request_writev_done: client write error %s\n",
1292                         nt_errstr(status)));
1293                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1294                 return;
1295         }
1296 }
1297
1298 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
1299                                    NTSTATUS status,
1300                                    DATA_BLOB body, DATA_BLOB *dyn,
1301                                    const char *location)
1302 {
1303         uint8_t *outhdr;
1304         int i = req->current_idx;
1305         uint32_t next_command_ofs;
1306
1307         DEBUG(10,("smbd_smb2_request_done_ex: "
1308                   "idx[%d] status[%s] body[%u] dyn[%s:%u] at %s\n",
1309                   i, nt_errstr(status), (unsigned int)body.length,
1310                   dyn ? "yes": "no",
1311                   (unsigned int)(dyn ? dyn->length : 0),
1312                   location));
1313
1314         if (body.length < 2) {
1315                 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
1316         }
1317
1318         if ((body.length % 2) != 0) {
1319                 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
1320         }
1321
1322         outhdr = (uint8_t *)req->out.vector[i].iov_base;
1323
1324         next_command_ofs = IVAL(outhdr, SMB2_HDR_NEXT_COMMAND);
1325         SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
1326
1327         req->out.vector[i+1].iov_base = (void *)body.data;
1328         req->out.vector[i+1].iov_len = body.length;
1329
1330         if (dyn) {
1331                 req->out.vector[i+2].iov_base   = (void *)dyn->data;
1332                 req->out.vector[i+2].iov_len    = dyn->length;
1333         } else {
1334                 req->out.vector[i+2].iov_base = NULL;
1335                 req->out.vector[i+2].iov_len = 0;
1336         }
1337
1338         /* see if we need to recalculate the offset to the next response */
1339         if (next_command_ofs > 0) {
1340                 next_command_ofs  = SMB2_HDR_BODY;
1341                 next_command_ofs += req->out.vector[i+1].iov_len;
1342                 next_command_ofs += req->out.vector[i+2].iov_len;
1343         }
1344
1345         if ((next_command_ofs % 8) != 0) {
1346                 size_t pad_size = 8 - (next_command_ofs % 8);
1347                 if (req->out.vector[i+2].iov_len == 0) {
1348                         /*
1349                          * if the dyn buffer is empty
1350                          * we can use it to add padding
1351                          */
1352                         uint8_t *pad;
1353
1354                         pad = talloc_zero_array(req->out.vector,
1355                                                 uint8_t, pad_size);
1356                         if (pad == NULL) {
1357                                 return smbd_smb2_request_error(req,
1358                                                 NT_STATUS_NO_MEMORY);
1359                         }
1360
1361                         req->out.vector[i+2].iov_base = (void *)pad;
1362                         req->out.vector[i+2].iov_len = pad_size;
1363                 } else {
1364                         /*
1365                          * For now we copy the dynamic buffer
1366                          * and add the padding to the new buffer
1367                          */
1368                         size_t old_size;
1369                         uint8_t *old_dyn;
1370                         size_t new_size;
1371                         uint8_t *new_dyn;
1372
1373                         old_size = req->out.vector[i+2].iov_len;
1374                         old_dyn = (uint8_t *)req->out.vector[i+2].iov_base;
1375
1376                         new_size = old_size + pad_size;
1377                         new_dyn = talloc_zero_array(req->out.vector,
1378                                                uint8_t, new_size);
1379                         if (new_dyn == NULL) {
1380                                 return smbd_smb2_request_error(req,
1381                                                 NT_STATUS_NO_MEMORY);
1382                         }
1383
1384                         memcpy(new_dyn, old_dyn, old_size);
1385                         memset(new_dyn + old_size, 0, pad_size);
1386
1387                         req->out.vector[i+2].iov_base = (void *)new_dyn;
1388                         req->out.vector[i+2].iov_len = new_size;
1389                 }
1390                 next_command_ofs += pad_size;
1391         }
1392
1393         SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
1394
1395         return smbd_smb2_request_reply(req);
1396 }
1397
1398 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
1399                                     NTSTATUS status,
1400                                     DATA_BLOB *info,
1401                                     const char *location)
1402 {
1403         DATA_BLOB body;
1404         int i = req->current_idx;
1405         uint8_t *outhdr = (uint8_t *)req->out.vector[i].iov_base;
1406
1407         DEBUG(10,("smbd_smb2_request_error_ex: idx[%d] status[%s] |%s| at %s\n",
1408                   i, nt_errstr(status), info ? " +info" : "",
1409                   location));
1410
1411         body.data = outhdr + SMB2_HDR_BODY;
1412         body.length = 8;
1413         SSVAL(body.data, 0, 9);
1414
1415         if (info) {
1416                 SIVAL(body.data, 0x04, info->length);
1417         } else {
1418                 /* Allocated size of req->out.vector[i].iov_base
1419                  * *MUST BE* OUTVEC_ALLOC_SIZE. So we have room for
1420                  * 1 byte without having to do an alloc.
1421                  */
1422                 info = talloc_zero_array(req->out.vector,
1423                                         DATA_BLOB,
1424                                         1);
1425                 if (!info) {
1426                         return NT_STATUS_NO_MEMORY;
1427                 }
1428                 info->data = ((uint8_t *)outhdr) +
1429                         OUTVEC_ALLOC_SIZE - 1;
1430                 info->length = 1;
1431                 SCVAL(info->data, 0, 0);
1432         }
1433
1434         /*
1435          * if a request fails, all other remaining
1436          * compounded requests should fail too
1437          */
1438         req->next_status = NT_STATUS_INVALID_PARAMETER;
1439
1440         return smbd_smb2_request_done_ex(req, status, body, info, __location__);
1441 }
1442
1443
1444 struct smbd_smb2_send_oplock_break_state {
1445         struct smbd_server_connection *sconn;
1446         uint8_t buf[4 + SMB2_HDR_BODY + 0x18];
1447         struct iovec vector;
1448 };
1449
1450 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq);
1451
1452 NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
1453                                      uint64_t file_id_persistent,
1454                                      uint64_t file_id_volatile,
1455                                      uint8_t oplock_level)
1456 {
1457         struct smbd_smb2_send_oplock_break_state *state;
1458         struct tevent_req *subreq;
1459         uint8_t *hdr;
1460         uint8_t *body;
1461
1462         state = talloc(sconn, struct smbd_smb2_send_oplock_break_state);
1463         if (state == NULL) {
1464                 return NT_STATUS_NO_MEMORY;
1465         }
1466         state->sconn = sconn;
1467
1468         state->vector.iov_base = (void *)state->buf;
1469         state->vector.iov_len = sizeof(state->buf);
1470
1471         _smb2_setlen(state->buf, sizeof(state->buf) - 4);
1472         hdr = state->buf + 4;
1473         body = hdr + SMB2_HDR_BODY;
1474
1475         SIVAL(hdr, 0,                           SMB2_MAGIC);
1476         SSVAL(hdr, SMB2_HDR_LENGTH,             SMB2_HDR_BODY);
1477         SSVAL(hdr, SMB2_HDR_EPOCH,              0);
1478         SIVAL(hdr, SMB2_HDR_STATUS,             0);
1479         SSVAL(hdr, SMB2_HDR_OPCODE,             SMB2_OP_BREAK);
1480         SSVAL(hdr, SMB2_HDR_CREDIT,             0);
1481         SIVAL(hdr, SMB2_HDR_FLAGS,              SMB2_HDR_FLAG_REDIRECT);
1482         SIVAL(hdr, SMB2_HDR_NEXT_COMMAND,       0);
1483         SBVAL(hdr, SMB2_HDR_MESSAGE_ID,         UINT64_MAX);
1484         SIVAL(hdr, SMB2_HDR_PID,                0);
1485         SIVAL(hdr, SMB2_HDR_TID,                0);
1486         SBVAL(hdr, SMB2_HDR_SESSION_ID,         0);
1487         memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
1488
1489         SSVAL(body, 0x00, 0x18);
1490
1491         SCVAL(body, 0x02, oplock_level);
1492         SCVAL(body, 0x03, 0);           /* reserved */
1493         SIVAL(body, 0x04, 0);           /* reserved */
1494         SBVAL(body, 0x08, file_id_persistent);
1495         SBVAL(body, 0x10, file_id_volatile);
1496
1497         subreq = tstream_writev_queue_send(state,
1498                                            sconn->smb2.event_ctx,
1499                                            sconn->smb2.stream,
1500                                            sconn->smb2.send_queue,
1501                                            &state->vector, 1);
1502         if (subreq == NULL) {
1503                 return NT_STATUS_NO_MEMORY;
1504         }
1505         tevent_req_set_callback(subreq,
1506                                 smbd_smb2_oplock_break_writev_done,
1507                                 state);
1508
1509         return NT_STATUS_OK;
1510 }
1511
1512 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq)
1513 {
1514         struct smbd_smb2_send_oplock_break_state *state =
1515                 tevent_req_callback_data(subreq,
1516                 struct smbd_smb2_send_oplock_break_state);
1517         struct smbd_server_connection *sconn = state->sconn;
1518         int ret;
1519         int sys_errno;
1520
1521         ret = tstream_writev_queue_recv(subreq, &sys_errno);
1522         TALLOC_FREE(subreq);
1523         if (ret == -1) {
1524                 NTSTATUS status = map_nt_error_from_unix(sys_errno);
1525                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1526                 return;
1527         }
1528
1529         TALLOC_FREE(state);
1530 }
1531
1532 struct smbd_smb2_request_read_state {
1533         size_t missing;
1534         bool asked_for_header;
1535         struct smbd_smb2_request *smb2_req;
1536 };
1537
1538 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1539                                          void *private_data,
1540                                          TALLOC_CTX *mem_ctx,
1541                                          struct iovec **_vector,
1542                                          size_t *_count);
1543 static void smbd_smb2_request_read_done(struct tevent_req *subreq);
1544
1545 static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx,
1546                                         struct tevent_context *ev,
1547                                         struct smbd_server_connection *sconn)
1548 {
1549         struct tevent_req *req;
1550         struct smbd_smb2_request_read_state *state;
1551         struct tevent_req *subreq;
1552
1553         req = tevent_req_create(mem_ctx, &state,
1554                                 struct smbd_smb2_request_read_state);
1555         if (req == NULL) {
1556                 return NULL;
1557         }
1558         state->missing = 0;
1559         state->asked_for_header = false;
1560
1561         state->smb2_req = smbd_smb2_request_allocate(state);
1562         if (tevent_req_nomem(state->smb2_req, req)) {
1563                 return tevent_req_post(req, ev);
1564         }
1565         state->smb2_req->sconn = sconn;
1566
1567         subreq = tstream_readv_pdu_queue_send(state, ev, sconn->smb2.stream,
1568                                               sconn->smb2.recv_queue,
1569                                               smbd_smb2_request_next_vector,
1570                                               state);
1571         if (tevent_req_nomem(subreq, req)) {
1572                 return tevent_req_post(req, ev);
1573         }
1574         tevent_req_set_callback(subreq, smbd_smb2_request_read_done, req);
1575
1576         return req;
1577 }
1578
1579 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1580                                          void *private_data,
1581                                          TALLOC_CTX *mem_ctx,
1582                                          struct iovec **_vector,
1583                                          size_t *_count)
1584 {
1585         struct smbd_smb2_request_read_state *state =
1586                 talloc_get_type_abort(private_data,
1587                 struct smbd_smb2_request_read_state);
1588         struct smbd_smb2_request *req = state->smb2_req;
1589         struct iovec *vector;
1590         int idx = req->in.vector_count;
1591         size_t len = 0;
1592         uint8_t *buf = NULL;
1593
1594         if (req->in.vector_count == 0) {
1595                 /*
1596                  * first we need to get the NBT header
1597                  */
1598                 req->in.vector = talloc_array(req, struct iovec,
1599                                               req->in.vector_count + 1);
1600                 if (req->in.vector == NULL) {
1601                         return -1;
1602                 }
1603                 req->in.vector_count += 1;
1604
1605                 req->in.vector[idx].iov_base    = (void *)req->in.nbt_hdr;
1606                 req->in.vector[idx].iov_len     = 4;
1607
1608                 vector = talloc_array(mem_ctx, struct iovec, 1);
1609                 if (vector == NULL) {
1610                         return -1;
1611                 }
1612
1613                 vector[0] = req->in.vector[idx];
1614
1615                 *_vector = vector;
1616                 *_count = 1;
1617                 return 0;
1618         }
1619
1620         if (req->in.vector_count == 1) {
1621                 /*
1622                  * Now we analyze the NBT header
1623                  */
1624                 state->missing = smb2_len(req->in.vector[0].iov_base);
1625
1626                 if (state->missing == 0) {
1627                         /* if there're no remaining bytes, we're done */
1628                         *_vector = NULL;
1629                         *_count = 0;
1630                         return 0;
1631                 }
1632
1633                 req->in.vector = talloc_realloc(req, req->in.vector,
1634                                                 struct iovec,
1635                                                 req->in.vector_count + 1);
1636                 if (req->in.vector == NULL) {
1637                         return -1;
1638                 }
1639                 req->in.vector_count += 1;
1640
1641                 if (CVAL(req->in.vector[0].iov_base, 0) != 0) {
1642                         /*
1643                          * it's a special NBT message,
1644                          * so get all remaining bytes
1645                          */
1646                         len = state->missing;
1647                 } else if (state->missing < (SMB2_HDR_BODY + 2)) {
1648                         /*
1649                          * it's an invalid message, just read what we can get
1650                          * and let the caller handle the error
1651                          */
1652                         len = state->missing;
1653                 } else {
1654                         /*
1655                          * We assume it's a SMB2 request,
1656                          * and we first get the header and the
1657                          * first 2 bytes (the struct size) of the body
1658                          */
1659                         len = SMB2_HDR_BODY + 2;
1660
1661                         state->asked_for_header = true;
1662                 }
1663
1664                 state->missing -= len;
1665
1666                 buf = talloc_array(req->in.vector, uint8_t, len);
1667                 if (buf == NULL) {
1668                         return -1;
1669                 }
1670
1671                 req->in.vector[idx].iov_base    = (void *)buf;
1672                 req->in.vector[idx].iov_len     = len;
1673
1674                 vector = talloc_array(mem_ctx, struct iovec, 1);
1675                 if (vector == NULL) {
1676                         return -1;
1677                 }
1678
1679                 vector[0] = req->in.vector[idx];
1680
1681                 *_vector = vector;
1682                 *_count = 1;
1683                 return 0;
1684         }
1685
1686         if (state->missing == 0) {
1687                 /* if there're no remaining bytes, we're done */
1688                 *_vector = NULL;
1689                 *_count = 0;
1690                 return 0;
1691         }
1692
1693         if (state->asked_for_header) {
1694                 const uint8_t *hdr;
1695                 size_t full_size;
1696                 size_t next_command_ofs;
1697                 size_t body_size;
1698                 uint8_t *body;
1699                 size_t dyn_size;
1700                 uint8_t *dyn;
1701                 bool invalid = false;
1702
1703                 state->asked_for_header = false;
1704
1705                 /*
1706                  * We got the SMB2 header and the first 2 bytes
1707                  * of the body. We fix the size to just the header
1708                  * and manually copy the 2 first bytes to the body section
1709                  */
1710                 req->in.vector[idx-1].iov_len = SMB2_HDR_BODY;
1711                 hdr = (const uint8_t *)req->in.vector[idx-1].iov_base;
1712
1713                 /* allocate vectors for body and dynamic areas */
1714                 req->in.vector = talloc_realloc(req, req->in.vector,
1715                                                 struct iovec,
1716                                                 req->in.vector_count + 2);
1717                 if (req->in.vector == NULL) {
1718                         return -1;
1719                 }
1720                 req->in.vector_count += 2;
1721
1722                 full_size = state->missing + SMB2_HDR_BODY + 2;
1723                 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
1724                 body_size = SVAL(hdr, SMB2_HDR_BODY);
1725
1726                 if (next_command_ofs != 0) {
1727                         if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
1728                                 /*
1729                                  * this is invalid, just return a zero
1730                                  * body and let the caller deal with the error
1731                                  */
1732                                 invalid = true;
1733                         } else if (next_command_ofs > full_size) {
1734                                 /*
1735                                  * this is invalid, just return a zero
1736                                  * body and let the caller deal with the error
1737                                  */
1738                                 invalid = true;
1739                         } else {
1740                                 full_size = next_command_ofs;
1741                         }
1742                 }
1743
1744                 if (!invalid) {
1745                         if (body_size < 2) {
1746                                 /*
1747                                  * this is invalid, just return a zero
1748                                  * body and let the caller deal with the error
1749                                  */
1750                                 invalid = true;
1751                         }
1752
1753                         if ((body_size % 2) != 0) {
1754                                 body_size -= 1;
1755                         }
1756
1757                         if (body_size > (full_size - SMB2_HDR_BODY)) {
1758                                 /*
1759                                  * this is invalid, just return a zero
1760                                  * body and let the caller deal with the error
1761                                  */
1762                                 invalid = true;
1763                         }
1764                 }
1765
1766                 if (invalid) {
1767                         /* the caller should check this */
1768                         body_size = 2;
1769                 }
1770
1771                 dyn_size = full_size - (SMB2_HDR_BODY + body_size);
1772
1773                 state->missing -= (body_size - 2) + dyn_size;
1774
1775                 body = talloc_array(req->in.vector, uint8_t, body_size);
1776                 if (body == NULL) {
1777                         return -1;
1778                 }
1779
1780                 dyn = talloc_array(req->in.vector, uint8_t, dyn_size);
1781                 if (dyn == NULL) {
1782                         return -1;
1783                 }
1784
1785                 req->in.vector[idx].iov_base    = (void *)body;
1786                 req->in.vector[idx].iov_len     = body_size;
1787                 req->in.vector[idx+1].iov_base  = (void *)dyn;
1788                 req->in.vector[idx+1].iov_len   = dyn_size;
1789
1790                 vector = talloc_array(mem_ctx, struct iovec, 2);
1791                 if (vector == NULL) {
1792                         return -1;
1793                 }
1794
1795                 /*
1796                  * the first 2 bytes of the body were already fetched
1797                  * together with the header
1798                  */
1799                 memcpy(body, hdr + SMB2_HDR_BODY, 2);
1800                 vector[0].iov_base = body + 2;
1801                 vector[0].iov_len = body_size - 2;
1802
1803                 vector[1] = req->in.vector[idx+1];
1804
1805                 *_vector = vector;
1806                 *_count = 2;
1807                 return 0;
1808         }
1809
1810         /*
1811          * when we endup here, we're looking for a new SMB2 request
1812          * next. And we ask for its header and the first 2 bytes of
1813          * the body (like we did for the first SMB2 request).
1814          */
1815
1816         req->in.vector = talloc_realloc(req, req->in.vector,
1817                                         struct iovec,
1818                                         req->in.vector_count + 1);
1819         if (req->in.vector == NULL) {
1820                 return -1;
1821         }
1822         req->in.vector_count += 1;
1823
1824         /*
1825          * We assume it's a SMB2 request,
1826          * and we first get the header and the
1827          * first 2 bytes (the struct size) of the body
1828          */
1829         len = SMB2_HDR_BODY + 2;
1830
1831         if (len > state->missing) {
1832                 /* let the caller handle the error */
1833                 len = state->missing;
1834         }
1835
1836         state->missing -= len;
1837         state->asked_for_header = true;
1838
1839         buf = talloc_array(req->in.vector, uint8_t, len);
1840         if (buf == NULL) {
1841                 return -1;
1842         }
1843
1844         req->in.vector[idx].iov_base    = (void *)buf;
1845         req->in.vector[idx].iov_len     = len;
1846
1847         vector = talloc_array(mem_ctx, struct iovec, 1);
1848         if (vector == NULL) {
1849                 return -1;
1850         }
1851
1852         vector[0] = req->in.vector[idx];
1853
1854         *_vector = vector;
1855         *_count = 1;
1856         return 0;
1857 }
1858
1859 static void smbd_smb2_request_read_done(struct tevent_req *subreq)
1860 {
1861         struct tevent_req *req =
1862                 tevent_req_callback_data(subreq,
1863                 struct tevent_req);
1864         int ret;
1865         int sys_errno;
1866         NTSTATUS status;
1867
1868         ret = tstream_readv_pdu_queue_recv(subreq, &sys_errno);
1869         if (ret == -1) {
1870                 status = map_nt_error_from_unix(sys_errno);
1871                 tevent_req_nterror(req, status);
1872                 return;
1873         }
1874
1875         tevent_req_done(req);
1876 }
1877
1878 static NTSTATUS smbd_smb2_request_read_recv(struct tevent_req *req,
1879                                             TALLOC_CTX *mem_ctx,
1880                                             struct smbd_smb2_request **_smb2_req)
1881 {
1882         struct smbd_smb2_request_read_state *state =
1883                 tevent_req_data(req,
1884                 struct smbd_smb2_request_read_state);
1885         NTSTATUS status;
1886
1887         if (tevent_req_is_nterror(req, &status)) {
1888                 tevent_req_received(req);
1889                 return status;
1890         }
1891
1892         talloc_steal(mem_ctx, state->smb2_req->mem_pool);
1893         *_smb2_req = state->smb2_req;
1894         tevent_req_received(req);
1895         return NT_STATUS_OK;
1896 }
1897
1898 static void smbd_smb2_request_incoming(struct tevent_req *subreq);
1899
1900 void smbd_smb2_first_negprot(struct smbd_server_connection *sconn,
1901                              const uint8_t *inbuf, size_t size)
1902 {
1903         NTSTATUS status;
1904         struct smbd_smb2_request *req;
1905         struct tevent_req *subreq;
1906
1907         DEBUG(10,("smbd_smb2_first_negprot: packet length %u\n",
1908                  (unsigned int)size));
1909
1910         status = smbd_initialize_smb2(sconn);
1911         if (!NT_STATUS_IS_OK(status)) {
1912                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1913                 return;
1914         }
1915
1916         status = smbd_smb2_request_create(sconn, inbuf, size, &req);
1917         if (!NT_STATUS_IS_OK(status)) {
1918                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1919                 return;
1920         }
1921
1922         status = smbd_smb2_request_setup_out(req, 1);
1923         if (!NT_STATUS_IS_OK(status)) {
1924                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1925                 return;
1926         }
1927
1928         status = smbd_smb2_request_dispatch(req);
1929         if (!NT_STATUS_IS_OK(status)) {
1930                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1931                 return;
1932         }
1933
1934         /* ask for the next request */
1935         subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
1936         if (subreq == NULL) {
1937                 smbd_server_connection_terminate(sconn, "no memory for reading");
1938                 return;
1939         }
1940         tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
1941 }
1942
1943 static void smbd_smb2_request_incoming(struct tevent_req *subreq)
1944 {
1945         uint16_t creds_requested = 0;
1946         struct smbd_server_connection *sconn = tevent_req_callback_data(subreq,
1947                                                struct smbd_server_connection);
1948         NTSTATUS status;
1949         struct smbd_smb2_request *req = NULL;
1950
1951         status = smbd_smb2_request_read_recv(subreq, sconn, &req);
1952         TALLOC_FREE(subreq);
1953         if (!NT_STATUS_IS_OK(status)) {
1954                 DEBUG(2,("smbd_smb2_request_incoming: client read error %s\n",
1955                         nt_errstr(status)));
1956                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1957                 return;
1958         }
1959
1960         if (req->in.nbt_hdr[0] != 0x00) {
1961                 DEBUG(1,("smbd_smb2_request_incoming: ignore NBT[0x%02X] msg\n",
1962                          req->in.nbt_hdr[0]));
1963                 TALLOC_FREE(req);
1964                 goto next;
1965         }
1966
1967         req->current_idx = 1;
1968
1969         DEBUG(10,("smbd_smb2_request_incoming: idx[%d] of %d vectors\n",
1970                  req->current_idx, req->in.vector_count));
1971
1972         status = smbd_smb2_request_validate(req, &creds_requested);
1973         if (!NT_STATUS_IS_OK(status)) {
1974                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1975                 return;
1976         }
1977
1978         status = smbd_smb2_request_setup_out(req, 5);
1979         if (!NT_STATUS_IS_OK(status)) {
1980                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1981                 return;
1982         }
1983
1984         status = smbd_smb2_request_dispatch(req);
1985         if (!NT_STATUS_IS_OK(status)) {
1986                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1987                 return;
1988         }
1989
1990 next:
1991         /* ask for the next request (this constructs the main loop) */
1992         subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
1993         if (subreq == NULL) {
1994                 smbd_server_connection_terminate(sconn, "no memory for reading");
1995                 return;
1996         }
1997         tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
1998 }