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         TALLOC_FREE(req);
 915
 916         for (cur = sconn->smb2.requests; cur; cur = cur->next) {
 917                 const uint8_t *outhdr;
 918                 uint64_t message_id;
 919                 uint64_t async_id;
 920
 921                 i = cur->current_idx;
 922
 923                 outhdr = (const uint8_t *)cur->out.vector[i].iov_base;
 924
 925                 message_id = BVAL(outhdr, SMB2_HDR_MESSAGE_ID);
 926                 async_id = BVAL(outhdr, SMB2_HDR_PID);
 927
 928                 if (flags & SMB2_HDR_FLAG_ASYNC) {
 929                         if (search_async_id == async_id) {
 930                                 found_id = async_id;
 931                                 break;
 932                         }
 933                 } else {
 934                         if (search_message_id == message_id) {
 935                                 found_id = message_id;
 936                                 break;
 937                         }
 938                 }
 939         }
 940
 941         if (cur && cur->subreq) {
 942                 inhdr = (const uint8_t *)cur->in.vector[i].iov_base;
 943                 DEBUG(10,("smbd_smb2_request_process_cancel: attempting to "
 944                         "cancel opcode[%s] mid %llu\n",
 945                         smb2_opcode_name((uint16_t)IVAL(inhdr, SMB2_HDR_OPCODE)),
 946                         (unsigned long long)found_id ));
 947                 tevent_req_cancel(cur->subreq);
 948         }
 949
 950         return NT_STATUS_OK;
 951 }
 952
 953 NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req)
 954 {
 955         const uint8_t *inhdr;
 956         int i = req->current_idx;
 957         uint16_t opcode;
 958         uint32_t flags;
 959         uint64_t mid;
 960         NTSTATUS status;
 961         NTSTATUS session_status;
 962         uint32_t allowed_flags;
 963
 964         inhdr = (const uint8_t *)req->in.vector[i].iov_base;
 965
 966         /* TODO: verify more things */
 967
 968         flags = IVAL(inhdr, SMB2_HDR_FLAGS);
 969         opcode = IVAL(inhdr, SMB2_HDR_OPCODE);
 970         mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
 971         DEBUG(10,("smbd_smb2_request_dispatch: opcode[%s] mid = %llu\n",
 972                 smb2_opcode_name(opcode),
 973                 (unsigned long long)mid));
 974
 975         allowed_flags = SMB2_HDR_FLAG_CHAINED |
 976                         SMB2_HDR_FLAG_SIGNED |
 977                         SMB2_HDR_FLAG_DFS;
 978         if (opcode == SMB2_OP_CANCEL) {
 979                 allowed_flags |= SMB2_HDR_FLAG_ASYNC;
 980         }
 981         if ((flags & ~allowed_flags) != 0) {
 982                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
 983         }
 984
 985         session_status = smbd_smb2_request_check_session(req);
 986
 987         req->do_signing = false;
 988         if (flags & SMB2_HDR_FLAG_SIGNED) {
 989                 if (!NT_STATUS_IS_OK(session_status)) {
 990                         return smbd_smb2_request_error(req, session_status);
 991                 }
 992
 993                 req->do_signing = true;
 994                 status = smb2_signing_check_pdu(req->session->session_key,
 995                                                 &req->in.vector[i], 3);
 996                 if (!NT_STATUS_IS_OK(status)) {
 997                         return smbd_smb2_request_error(req, status);
 998                 }
 999         } else if (req->session && req->session->do_signing) {
1000                 return smbd_smb2_request_error(req, NT_STATUS_ACCESS_DENIED);
1001         }
1002
1003         if (flags & SMB2_HDR_FLAG_CHAINED) {
1004                 /*
1005                  * This check is mostly for giving the correct error code
1006                  * for compounded requests.
1007                  *
1008                  * TODO: we may need to move this after the session
1009                  *       and tcon checks.
1010                  */
1011                 if (!NT_STATUS_IS_OK(req->next_status)) {
1012                         return smbd_smb2_request_error(req, req->next_status);
1013                 }
1014         } else {
1015                 req->compat_chain_fsp = NULL;
1016         }
1017
1018         switch (opcode) {
1019         case SMB2_OP_NEGPROT:
1020                 return smbd_smb2_request_process_negprot(req);
1021
1022         case SMB2_OP_SESSSETUP:
1023                 return smbd_smb2_request_process_sesssetup(req);
1024
1025         case SMB2_OP_LOGOFF:
1026                 if (!NT_STATUS_IS_OK(session_status)) {
1027                         return smbd_smb2_request_error(req, session_status);
1028                 }
1029                 return smbd_smb2_request_process_logoff(req);
1030
1031         case SMB2_OP_TCON:
1032                 if (!NT_STATUS_IS_OK(session_status)) {
1033                         return smbd_smb2_request_error(req, session_status);
1034                 }
1035                 status = smbd_smb2_request_check_session(req);
1036                 if (!NT_STATUS_IS_OK(status)) {
1037                         return smbd_smb2_request_error(req, status);
1038                 }
1039                 return smbd_smb2_request_process_tcon(req);
1040
1041         case SMB2_OP_TDIS:
1042                 if (!NT_STATUS_IS_OK(session_status)) {
1043                         return smbd_smb2_request_error(req, session_status);
1044                 }
1045                 status = smbd_smb2_request_check_tcon(req);
1046                 if (!NT_STATUS_IS_OK(status)) {
1047                         return smbd_smb2_request_error(req, status);
1048                 }
1049                 return smbd_smb2_request_process_tdis(req);
1050
1051         case SMB2_OP_CREATE:
1052                 if (!NT_STATUS_IS_OK(session_status)) {
1053                         return smbd_smb2_request_error(req, session_status);
1054                 }
1055                 status = smbd_smb2_request_check_tcon(req);
1056                 if (!NT_STATUS_IS_OK(status)) {
1057                         return smbd_smb2_request_error(req, status);
1058                 }
1059                 return smbd_smb2_request_process_create(req);
1060
1061         case SMB2_OP_CLOSE:
1062                 if (!NT_STATUS_IS_OK(session_status)) {
1063                         return smbd_smb2_request_error(req, session_status);
1064                 }
1065                 status = smbd_smb2_request_check_tcon(req);
1066                 if (!NT_STATUS_IS_OK(status)) {
1067                         return smbd_smb2_request_error(req, status);
1068                 }
1069                 return smbd_smb2_request_process_close(req);
1070
1071         case SMB2_OP_FLUSH:
1072                 if (!NT_STATUS_IS_OK(session_status)) {
1073                         return smbd_smb2_request_error(req, session_status);
1074                 }
1075                 status = smbd_smb2_request_check_tcon(req);
1076                 if (!NT_STATUS_IS_OK(status)) {
1077                         return smbd_smb2_request_error(req, status);
1078                 }
1079                 return smbd_smb2_request_process_flush(req);
1080
1081         case SMB2_OP_READ:
1082                 if (!NT_STATUS_IS_OK(session_status)) {
1083                         return smbd_smb2_request_error(req, session_status);
1084                 }
1085                 status = smbd_smb2_request_check_tcon(req);
1086                 if (!NT_STATUS_IS_OK(status)) {
1087                         return smbd_smb2_request_error(req, status);
1088                 }
1089                 return smbd_smb2_request_process_read(req);
1090
1091         case SMB2_OP_WRITE:
1092                 if (!NT_STATUS_IS_OK(session_status)) {
1093                         return smbd_smb2_request_error(req, session_status);
1094                 }
1095                 status = smbd_smb2_request_check_tcon(req);
1096                 if (!NT_STATUS_IS_OK(status)) {
1097                         return smbd_smb2_request_error(req, status);
1098                 }
1099                 return smbd_smb2_request_process_write(req);
1100
1101         case SMB2_OP_LOCK:
1102                 if (!NT_STATUS_IS_OK(session_status)) {
1103                         /* Too ugly to live ? JRA. */
1104                         if (NT_STATUS_EQUAL(session_status,NT_STATUS_USER_SESSION_DELETED)) {
1105                                 session_status = NT_STATUS_FILE_CLOSED;
1106                         }
1107                         return smbd_smb2_request_error(req, session_status);
1108                 }
1109                 status = smbd_smb2_request_check_tcon(req);
1110                 if (!NT_STATUS_IS_OK(status)) {
1111                         /* Too ugly to live ? JRA. */
1112                         if (NT_STATUS_EQUAL(status,NT_STATUS_NETWORK_NAME_DELETED)) {
1113                                 status = NT_STATUS_FILE_CLOSED;
1114                         }
1115                         return smbd_smb2_request_error(req, status);
1116                 }
1117                 return smbd_smb2_request_process_lock(req);
1118
1119         case SMB2_OP_IOCTL:
1120                 if (!NT_STATUS_IS_OK(session_status)) {
1121                         return smbd_smb2_request_error(req, session_status);
1122                 }
1123                 status = smbd_smb2_request_check_tcon(req);
1124                 if (!NT_STATUS_IS_OK(status)) {
1125                         return smbd_smb2_request_error(req, status);
1126                 }
1127                 return smbd_smb2_request_process_ioctl(req);
1128
1129         case SMB2_OP_CANCEL:
1130                 return smbd_smb2_request_process_cancel(req);
1131
1132         case SMB2_OP_KEEPALIVE:
1133                 return smbd_smb2_request_process_keepalive(req);
1134
1135         case SMB2_OP_FIND:
1136                 if (!NT_STATUS_IS_OK(session_status)) {
1137                         return smbd_smb2_request_error(req, session_status);
1138                 }
1139                 status = smbd_smb2_request_check_tcon(req);
1140                 if (!NT_STATUS_IS_OK(status)) {
1141                         return smbd_smb2_request_error(req, status);
1142                 }
1143                 return smbd_smb2_request_process_find(req);
1144
1145         case SMB2_OP_NOTIFY:
1146                 if (!NT_STATUS_IS_OK(session_status)) {
1147                         return smbd_smb2_request_error(req, session_status);
1148                 }
1149                 status = smbd_smb2_request_check_tcon(req);
1150                 if (!NT_STATUS_IS_OK(status)) {
1151                         return smbd_smb2_request_error(req, status);
1152                 }
1153                 return smbd_smb2_request_process_notify(req);
1154
1155         case SMB2_OP_GETINFO:
1156                 if (!NT_STATUS_IS_OK(session_status)) {
1157                         return smbd_smb2_request_error(req, session_status);
1158                 }
1159                 status = smbd_smb2_request_check_tcon(req);
1160                 if (!NT_STATUS_IS_OK(status)) {
1161                         return smbd_smb2_request_error(req, status);
1162                 }
1163                 return smbd_smb2_request_process_getinfo(req);
1164
1165         case SMB2_OP_SETINFO:
1166                 if (!NT_STATUS_IS_OK(session_status)) {
1167                         return smbd_smb2_request_error(req, session_status);
1168                 }
1169                 status = smbd_smb2_request_check_tcon(req);
1170                 if (!NT_STATUS_IS_OK(status)) {
1171                         return smbd_smb2_request_error(req, status);
1172                 }
1173                 return smbd_smb2_request_process_setinfo(req);
1174
1175         case SMB2_OP_BREAK:
1176                 if (!NT_STATUS_IS_OK(session_status)) {
1177                         return smbd_smb2_request_error(req, session_status);
1178                 }
1179                 status = smbd_smb2_request_check_tcon(req);
1180                 if (!NT_STATUS_IS_OK(status)) {
1181                         return smbd_smb2_request_error(req, status);
1182                 }
1183                 return smbd_smb2_request_process_break(req);
1184         }
1185
1186         return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
1187 }
1188
1189 static NTSTATUS smbd_smb2_request_reply(struct smbd_smb2_request *req)
1190 {
1191         struct tevent_req *subreq;
1192
1193         req->subreq = NULL;
1194
1195         smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
1196
1197         if (req->do_signing) {
1198                 int i = req->current_idx;
1199                 NTSTATUS status;
1200                 status = smb2_signing_sign_pdu(req->session->session_key,
1201                                                &req->out.vector[i], 3);
1202                 if (!NT_STATUS_IS_OK(status)) {
1203                         return status;
1204                 }
1205         }
1206
1207         req->current_idx += 3;
1208
1209         if (req->current_idx < req->out.vector_count) {
1210                 /*
1211                  * We must process the remaining compound
1212                  * SMB2 requests before any new incoming SMB2
1213                  * requests. This is because incoming SMB2
1214                  * requests may include a cancel for a
1215                  * compound request we haven't processed
1216                  * yet.
1217                  */
1218                 struct tevent_immediate *im = tevent_create_immediate(req);
1219                 if (!im) {
1220                         return NT_STATUS_NO_MEMORY;
1221                 }
1222                 tevent_schedule_immediate(im,
1223                                         req->sconn->smb2.event_ctx,
1224                                         smbd_smb2_request_dispatch_immediate,
1225                                         req);
1226                 return NT_STATUS_OK;
1227         }
1228
1229         if (DEBUGLEVEL >= 10) {
1230                 dbgtext("smbd_smb2_request_reply: sending...\n");
1231                 print_req_vectors(req);
1232         }
1233
1234         subreq = tstream_writev_queue_send(req,
1235                                            req->sconn->smb2.event_ctx,
1236                                            req->sconn->smb2.stream,
1237                                            req->sconn->smb2.send_queue,
1238                                            req->out.vector,
1239                                            req->out.vector_count);
1240         if (subreq == NULL) {
1241                 return NT_STATUS_NO_MEMORY;
1242         }
1243         tevent_req_set_callback(subreq, smbd_smb2_request_writev_done, req);
1244         /*
1245          * We're done with this request -
1246          * move it off the "being processed" queue.
1247          */
1248         DLIST_REMOVE(req->sconn->smb2.requests, req);
1249
1250         return NT_STATUS_OK;
1251 }
1252
1253 void smbd_smb2_request_dispatch_immediate(struct tevent_context *ctx,
1254                                         struct tevent_immediate *im,
1255                                         void *private_data)
1256 {
1257         struct smbd_smb2_request *req = talloc_get_type_abort(private_data,
1258                                         struct smbd_smb2_request);
1259         struct smbd_server_connection *sconn = req->sconn;
1260         NTSTATUS status;
1261
1262         TALLOC_FREE(im);
1263
1264         if (DEBUGLEVEL >= 10) {
1265                 DEBUG(10,("smbd_smb2_request_dispatch_immediate: idx[%d] of %d vectors\n",
1266                         req->current_idx, req->in.vector_count));
1267                 print_req_vectors(req);
1268         }
1269
1270         status = smbd_smb2_request_dispatch(req);
1271         if (!NT_STATUS_IS_OK(status)) {
1272                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1273                 return;
1274         }
1275 }
1276
1277 static void smbd_smb2_request_writev_done(struct tevent_req *subreq)
1278 {
1279         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
1280                                         struct smbd_smb2_request);
1281         struct smbd_server_connection *sconn = req->sconn;
1282         int ret;
1283         int sys_errno;
1284
1285         ret = tstream_writev_queue_recv(subreq, &sys_errno);
1286         TALLOC_FREE(subreq);
1287         TALLOC_FREE(req);
1288         if (ret == -1) {
1289                 NTSTATUS status = map_nt_error_from_unix(sys_errno);
1290                 DEBUG(2,("smbd_smb2_request_writev_done: client write error %s\n",
1291                         nt_errstr(status)));
1292                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1293                 return;
1294         }
1295 }
1296
1297 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
1298                                    NTSTATUS status,
1299                                    DATA_BLOB body, DATA_BLOB *dyn,
1300                                    const char *location)
1301 {
1302         uint8_t *outhdr;
1303         int i = req->current_idx;
1304         uint32_t next_command_ofs;
1305
1306         DEBUG(10,("smbd_smb2_request_done_ex: "
1307                   "idx[%d] status[%s] body[%u] dyn[%s:%u] at %s\n",
1308                   i, nt_errstr(status), (unsigned int)body.length,
1309                   dyn ? "yes": "no",
1310                   (unsigned int)(dyn ? dyn->length : 0),
1311                   location));
1312
1313         if (body.length < 2) {
1314                 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
1315         }
1316
1317         if ((body.length % 2) != 0) {
1318                 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
1319         }
1320
1321         outhdr = (uint8_t *)req->out.vector[i].iov_base;
1322
1323         next_command_ofs = IVAL(outhdr, SMB2_HDR_NEXT_COMMAND);
1324         SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
1325
1326         req->out.vector[i+1].iov_base = (void *)body.data;
1327         req->out.vector[i+1].iov_len = body.length;
1328
1329         if (dyn) {
1330                 req->out.vector[i+2].iov_base   = (void *)dyn->data;
1331                 req->out.vector[i+2].iov_len    = dyn->length;
1332         } else {
1333                 req->out.vector[i+2].iov_base = NULL;
1334                 req->out.vector[i+2].iov_len = 0;
1335         }
1336
1337         /* see if we need to recalculate the offset to the next response */
1338         if (next_command_ofs > 0) {
1339                 next_command_ofs  = SMB2_HDR_BODY;
1340                 next_command_ofs += req->out.vector[i+1].iov_len;
1341                 next_command_ofs += req->out.vector[i+2].iov_len;
1342         }
1343
1344         if ((next_command_ofs % 8) != 0) {
1345                 size_t pad_size = 8 - (next_command_ofs % 8);
1346                 if (req->out.vector[i+2].iov_len == 0) {
1347                         /*
1348                          * if the dyn buffer is empty
1349                          * we can use it to add padding
1350                          */
1351                         uint8_t *pad;
1352
1353                         pad = talloc_zero_array(req->out.vector,
1354                                                 uint8_t, pad_size);
1355                         if (pad == NULL) {
1356                                 return smbd_smb2_request_error(req,
1357                                                 NT_STATUS_NO_MEMORY);
1358                         }
1359
1360                         req->out.vector[i+2].iov_base = (void *)pad;
1361                         req->out.vector[i+2].iov_len = pad_size;
1362                 } else {
1363                         /*
1364                          * For now we copy the dynamic buffer
1365                          * and add the padding to the new buffer
1366                          */
1367                         size_t old_size;
1368                         uint8_t *old_dyn;
1369                         size_t new_size;
1370                         uint8_t *new_dyn;
1371
1372                         old_size = req->out.vector[i+2].iov_len;
1373                         old_dyn = (uint8_t *)req->out.vector[i+2].iov_base;
1374
1375                         new_size = old_size + pad_size;
1376                         new_dyn = talloc_zero_array(req->out.vector,
1377                                                uint8_t, new_size);
1378                         if (new_dyn == NULL) {
1379                                 return smbd_smb2_request_error(req,
1380                                                 NT_STATUS_NO_MEMORY);
1381                         }
1382
1383                         memcpy(new_dyn, old_dyn, old_size);
1384                         memset(new_dyn + old_size, 0, pad_size);
1385
1386                         req->out.vector[i+2].iov_base = (void *)new_dyn;
1387                         req->out.vector[i+2].iov_len = new_size;
1388                 }
1389                 next_command_ofs += pad_size;
1390         }
1391
1392         SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
1393
1394         return smbd_smb2_request_reply(req);
1395 }
1396
1397 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
1398                                     NTSTATUS status,
1399                                     DATA_BLOB *info,
1400                                     const char *location)
1401 {
1402         DATA_BLOB body;
1403         int i = req->current_idx;
1404         uint8_t *outhdr = (uint8_t *)req->out.vector[i].iov_base;
1405
1406         DEBUG(10,("smbd_smb2_request_error_ex: idx[%d] status[%s] |%s| at %s\n",
1407                   i, nt_errstr(status), info ? " +info" : "",
1408                   location));
1409
1410         body.data = outhdr + SMB2_HDR_BODY;
1411         body.length = 8;
1412         SSVAL(body.data, 0, 9);
1413
1414         if (info) {
1415                 SIVAL(body.data, 0x04, info->length);
1416         } else {
1417                 /* Allocated size of req->out.vector[i].iov_base
1418                  * *MUST BE* OUTVEC_ALLOC_SIZE. So we have room for
1419                  * 1 byte without having to do an alloc.
1420                  */
1421                 info = talloc_zero_array(req->out.vector,
1422                                         DATA_BLOB,
1423                                         1);
1424                 if (!info) {
1425                         return NT_STATUS_NO_MEMORY;
1426                 }
1427                 info->data = ((uint8_t *)outhdr) +
1428                         OUTVEC_ALLOC_SIZE - 1;
1429                 info->length = 1;
1430                 SCVAL(info->data, 0, 0);
1431         }
1432
1433         /*
1434          * if a request fails, all other remaining
1435          * compounded requests should fail too
1436          */
1437         req->next_status = NT_STATUS_INVALID_PARAMETER;
1438
1439         return smbd_smb2_request_done_ex(req, status, body, info, __location__);
1440 }
1441
1442
1443 struct smbd_smb2_send_oplock_break_state {
1444         struct smbd_server_connection *sconn;
1445         uint8_t buf[4 + SMB2_HDR_BODY + 0x18];
1446         struct iovec vector;
1447 };
1448
1449 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq);
1450
1451 NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
1452                                      uint64_t file_id_persistent,
1453                                      uint64_t file_id_volatile,
1454                                      uint8_t oplock_level)
1455 {
1456         struct smbd_smb2_send_oplock_break_state *state;
1457         struct tevent_req *subreq;
1458         uint8_t *hdr;
1459         uint8_t *body;
1460
1461         state = talloc(sconn, struct smbd_smb2_send_oplock_break_state);
1462         if (state == NULL) {
1463                 return NT_STATUS_NO_MEMORY;
1464         }
1465         state->sconn = sconn;
1466
1467         state->vector.iov_base = (void *)state->buf;
1468         state->vector.iov_len = sizeof(state->buf);
1469
1470         _smb2_setlen(state->buf, sizeof(state->buf) - 4);
1471         hdr = state->buf + 4;
1472         body = hdr + SMB2_HDR_BODY;
1473
1474         SIVAL(hdr, 0,                           SMB2_MAGIC);
1475         SSVAL(hdr, SMB2_HDR_LENGTH,             SMB2_HDR_BODY);
1476         SSVAL(hdr, SMB2_HDR_EPOCH,              0);
1477         SIVAL(hdr, SMB2_HDR_STATUS,             0);
1478         SSVAL(hdr, SMB2_HDR_OPCODE,             SMB2_OP_BREAK);
1479         SSVAL(hdr, SMB2_HDR_CREDIT,             0);
1480         SIVAL(hdr, SMB2_HDR_FLAGS,              SMB2_HDR_FLAG_REDIRECT);
1481         SIVAL(hdr, SMB2_HDR_NEXT_COMMAND,       0);
1482         SBVAL(hdr, SMB2_HDR_MESSAGE_ID,         UINT64_MAX);
1483         SIVAL(hdr, SMB2_HDR_PID,                0);
1484         SIVAL(hdr, SMB2_HDR_TID,                0);
1485         SBVAL(hdr, SMB2_HDR_SESSION_ID,         0);
1486         memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
1487
1488         SSVAL(body, 0x00, 0x18);
1489
1490         SCVAL(body, 0x02, oplock_level);
1491         SCVAL(body, 0x03, 0);           /* reserved */
1492         SIVAL(body, 0x04, 0);           /* reserved */
1493         SBVAL(body, 0x08, file_id_persistent);
1494         SBVAL(body, 0x10, file_id_volatile);
1495
1496         subreq = tstream_writev_queue_send(state,
1497                                            sconn->smb2.event_ctx,
1498                                            sconn->smb2.stream,
1499                                            sconn->smb2.send_queue,
1500                                            &state->vector, 1);
1501         if (subreq == NULL) {
1502                 return NT_STATUS_NO_MEMORY;
1503         }
1504         tevent_req_set_callback(subreq,
1505                                 smbd_smb2_oplock_break_writev_done,
1506                                 state);
1507
1508         return NT_STATUS_OK;
1509 }
1510
1511 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq)
1512 {
1513         struct smbd_smb2_send_oplock_break_state *state =
1514                 tevent_req_callback_data(subreq,
1515                 struct smbd_smb2_send_oplock_break_state);
1516         struct smbd_server_connection *sconn = state->sconn;
1517         int ret;
1518         int sys_errno;
1519
1520         ret = tstream_writev_queue_recv(subreq, &sys_errno);
1521         TALLOC_FREE(subreq);
1522         if (ret == -1) {
1523                 NTSTATUS status = map_nt_error_from_unix(sys_errno);
1524                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1525                 return;
1526         }
1527
1528         TALLOC_FREE(state);
1529 }
1530
1531 struct smbd_smb2_request_read_state {
1532         size_t missing;
1533         bool asked_for_header;
1534         struct smbd_smb2_request *smb2_req;
1535 };
1536
1537 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1538                                          void *private_data,
1539                                          TALLOC_CTX *mem_ctx,
1540                                          struct iovec **_vector,
1541                                          size_t *_count);
1542 static void smbd_smb2_request_read_done(struct tevent_req *subreq);
1543
1544 static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx,
1545                                         struct tevent_context *ev,
1546                                         struct smbd_server_connection *sconn)
1547 {
1548         struct tevent_req *req;
1549         struct smbd_smb2_request_read_state *state;
1550         struct tevent_req *subreq;
1551
1552         req = tevent_req_create(mem_ctx, &state,
1553                                 struct smbd_smb2_request_read_state);
1554         if (req == NULL) {
1555                 return NULL;
1556         }
1557         state->missing = 0;
1558         state->asked_for_header = false;
1559
1560         state->smb2_req = smbd_smb2_request_allocate(state);
1561         if (tevent_req_nomem(state->smb2_req, req)) {
1562                 return tevent_req_post(req, ev);
1563         }
1564         state->smb2_req->sconn = sconn;
1565
1566         subreq = tstream_readv_pdu_queue_send(state, ev, sconn->smb2.stream,
1567                                               sconn->smb2.recv_queue,
1568                                               smbd_smb2_request_next_vector,
1569                                               state);
1570         if (tevent_req_nomem(subreq, req)) {
1571                 return tevent_req_post(req, ev);
1572         }
1573         tevent_req_set_callback(subreq, smbd_smb2_request_read_done, req);
1574
1575         return req;
1576 }
1577
1578 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1579                                          void *private_data,
1580                                          TALLOC_CTX *mem_ctx,
1581                                          struct iovec **_vector,
1582                                          size_t *_count)
1583 {
1584         struct smbd_smb2_request_read_state *state =
1585                 talloc_get_type_abort(private_data,
1586                 struct smbd_smb2_request_read_state);
1587         struct smbd_smb2_request *req = state->smb2_req;
1588         struct iovec *vector;
1589         int idx = req->in.vector_count;
1590         size_t len = 0;
1591         uint8_t *buf = NULL;
1592
1593         if (req->in.vector_count == 0) {
1594                 /*
1595                  * first we need to get the NBT header
1596                  */
1597                 req->in.vector = talloc_array(req, struct iovec,
1598                                               req->in.vector_count + 1);
1599                 if (req->in.vector == NULL) {
1600                         return -1;
1601                 }
1602                 req->in.vector_count += 1;
1603
1604                 req->in.vector[idx].iov_base    = (void *)req->in.nbt_hdr;
1605                 req->in.vector[idx].iov_len     = 4;
1606
1607                 vector = talloc_array(mem_ctx, struct iovec, 1);
1608                 if (vector == NULL) {
1609                         return -1;
1610                 }
1611
1612                 vector[0] = req->in.vector[idx];
1613
1614                 *_vector = vector;
1615                 *_count = 1;
1616                 return 0;
1617         }
1618
1619         if (req->in.vector_count == 1) {
1620                 /*
1621                  * Now we analyze the NBT header
1622                  */
1623                 state->missing = smb2_len(req->in.vector[0].iov_base);
1624
1625                 if (state->missing == 0) {
1626                         /* if there're no remaining bytes, we're done */
1627                         *_vector = NULL;
1628                         *_count = 0;
1629                         return 0;
1630                 }
1631
1632                 req->in.vector = talloc_realloc(req, req->in.vector,
1633                                                 struct iovec,
1634                                                 req->in.vector_count + 1);
1635                 if (req->in.vector == NULL) {
1636                         return -1;
1637                 }
1638                 req->in.vector_count += 1;
1639
1640                 if (CVAL(req->in.vector[0].iov_base, 0) != 0) {
1641                         /*
1642                          * it's a special NBT message,
1643                          * so get all remaining bytes
1644                          */
1645                         len = state->missing;
1646                 } else if (state->missing < (SMB2_HDR_BODY + 2)) {
1647                         /*
1648                          * it's an invalid message, just read what we can get
1649                          * and let the caller handle the error
1650                          */
1651                         len = state->missing;
1652                 } else {
1653                         /*
1654                          * We assume it's a SMB2 request,
1655                          * and we first get the header and the
1656                          * first 2 bytes (the struct size) of the body
1657                          */
1658                         len = SMB2_HDR_BODY + 2;
1659
1660                         state->asked_for_header = true;
1661                 }
1662
1663                 state->missing -= len;
1664
1665                 buf = talloc_array(req->in.vector, uint8_t, len);
1666                 if (buf == NULL) {
1667                         return -1;
1668                 }
1669
1670                 req->in.vector[idx].iov_base    = (void *)buf;
1671                 req->in.vector[idx].iov_len     = len;
1672
1673                 vector = talloc_array(mem_ctx, struct iovec, 1);
1674                 if (vector == NULL) {
1675                         return -1;
1676                 }
1677
1678                 vector[0] = req->in.vector[idx];
1679
1680                 *_vector = vector;
1681                 *_count = 1;
1682                 return 0;
1683         }
1684
1685         if (state->missing == 0) {
1686                 /* if there're no remaining bytes, we're done */
1687                 *_vector = NULL;
1688                 *_count = 0;
1689                 return 0;
1690         }
1691
1692         if (state->asked_for_header) {
1693                 const uint8_t *hdr;
1694                 size_t full_size;
1695                 size_t next_command_ofs;
1696                 size_t body_size;
1697                 uint8_t *body;
1698                 size_t dyn_size;
1699                 uint8_t *dyn;
1700                 bool invalid = false;
1701
1702                 state->asked_for_header = false;
1703
1704                 /*
1705                  * We got the SMB2 header and the first 2 bytes
1706                  * of the body. We fix the size to just the header
1707                  * and manually copy the 2 first bytes to the body section
1708                  */
1709                 req->in.vector[idx-1].iov_len = SMB2_HDR_BODY;
1710                 hdr = (const uint8_t *)req->in.vector[idx-1].iov_base;
1711
1712                 /* allocate vectors for body and dynamic areas */
1713                 req->in.vector = talloc_realloc(req, req->in.vector,
1714                                                 struct iovec,
1715                                                 req->in.vector_count + 2);
1716                 if (req->in.vector == NULL) {
1717                         return -1;
1718                 }
1719                 req->in.vector_count += 2;
1720
1721                 full_size = state->missing + SMB2_HDR_BODY + 2;
1722                 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
1723                 body_size = SVAL(hdr, SMB2_HDR_BODY);
1724
1725                 if (next_command_ofs != 0) {
1726                         if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
1727                                 /*
1728                                  * this is invalid, just return a zero
1729                                  * body and let the caller deal with the error
1730                                  */
1731                                 invalid = true;
1732                         } else if (next_command_ofs > full_size) {
1733                                 /*
1734                                  * this is invalid, just return a zero
1735                                  * body and let the caller deal with the error
1736                                  */
1737                                 invalid = true;
1738                         } else {
1739                                 full_size = next_command_ofs;
1740                         }
1741                 }
1742
1743                 if (!invalid) {
1744                         if (body_size < 2) {
1745                                 /*
1746                                  * this is invalid, just return a zero
1747                                  * body and let the caller deal with the error
1748                                  */
1749                                 invalid = true;
1750                         }
1751
1752                         if ((body_size % 2) != 0) {
1753                                 body_size -= 1;
1754                         }
1755
1756                         if (body_size > (full_size - SMB2_HDR_BODY)) {
1757                                 /*
1758                                  * this is invalid, just return a zero
1759                                  * body and let the caller deal with the error
1760                                  */
1761                                 invalid = true;
1762                         }
1763                 }
1764
1765                 if (invalid) {
1766                         /* the caller should check this */
1767                         body_size = 2;
1768                 }
1769
1770                 dyn_size = full_size - (SMB2_HDR_BODY + body_size);
1771
1772                 state->missing -= (body_size - 2) + dyn_size;
1773
1774                 body = talloc_array(req->in.vector, uint8_t, body_size);
1775                 if (body == NULL) {
1776                         return -1;
1777                 }
1778
1779                 dyn = talloc_array(req->in.vector, uint8_t, dyn_size);
1780                 if (dyn == NULL) {
1781                         return -1;
1782                 }
1783
1784                 req->in.vector[idx].iov_base    = (void *)body;
1785                 req->in.vector[idx].iov_len     = body_size;
1786                 req->in.vector[idx+1].iov_base  = (void *)dyn;
1787                 req->in.vector[idx+1].iov_len   = dyn_size;
1788
1789                 vector = talloc_array(mem_ctx, struct iovec, 2);
1790                 if (vector == NULL) {
1791                         return -1;
1792                 }
1793
1794                 /*
1795                  * the first 2 bytes of the body were already fetched
1796                  * together with the header
1797                  */
1798                 memcpy(body, hdr + SMB2_HDR_BODY, 2);
1799                 vector[0].iov_base = body + 2;
1800                 vector[0].iov_len = body_size - 2;
1801
1802                 vector[1] = req->in.vector[idx+1];
1803
1804                 *_vector = vector;
1805                 *_count = 2;
1806                 return 0;
1807         }
1808
1809         /*
1810          * when we endup here, we're looking for a new SMB2 request
1811          * next. And we ask for its header and the first 2 bytes of
1812          * the body (like we did for the first SMB2 request).
1813          */
1814
1815         req->in.vector = talloc_realloc(req, req->in.vector,
1816                                         struct iovec,
1817                                         req->in.vector_count + 1);
1818         if (req->in.vector == NULL) {
1819                 return -1;
1820         }
1821         req->in.vector_count += 1;
1822
1823         /*
1824          * We assume it's a SMB2 request,
1825          * and we first get the header and the
1826          * first 2 bytes (the struct size) of the body
1827          */
1828         len = SMB2_HDR_BODY + 2;
1829
1830         if (len > state->missing) {
1831                 /* let the caller handle the error */
1832                 len = state->missing;
1833         }
1834
1835         state->missing -= len;
1836         state->asked_for_header = true;
1837
1838         buf = talloc_array(req->in.vector, uint8_t, len);
1839         if (buf == NULL) {
1840                 return -1;
1841         }
1842
1843         req->in.vector[idx].iov_base    = (void *)buf;
1844         req->in.vector[idx].iov_len     = len;
1845
1846         vector = talloc_array(mem_ctx, struct iovec, 1);
1847         if (vector == NULL) {
1848                 return -1;
1849         }
1850
1851         vector[0] = req->in.vector[idx];
1852
1853         *_vector = vector;
1854         *_count = 1;
1855         return 0;
1856 }
1857
1858 static void smbd_smb2_request_read_done(struct tevent_req *subreq)
1859 {
1860         struct tevent_req *req =
1861                 tevent_req_callback_data(subreq,
1862                 struct tevent_req);
1863         int ret;
1864         int sys_errno;
1865         NTSTATUS status;
1866
1867         ret = tstream_readv_pdu_queue_recv(subreq, &sys_errno);
1868         if (ret == -1) {
1869                 status = map_nt_error_from_unix(sys_errno);
1870                 tevent_req_nterror(req, status);
1871                 return;
1872         }
1873
1874         tevent_req_done(req);
1875 }
1876
1877 static NTSTATUS smbd_smb2_request_read_recv(struct tevent_req *req,
1878                                             TALLOC_CTX *mem_ctx,
1879                                             struct smbd_smb2_request **_smb2_req)
1880 {
1881         struct smbd_smb2_request_read_state *state =
1882                 tevent_req_data(req,
1883                 struct smbd_smb2_request_read_state);
1884         NTSTATUS status;
1885
1886         if (tevent_req_is_nterror(req, &status)) {
1887                 tevent_req_received(req);
1888                 return status;
1889         }
1890
1891         talloc_steal(mem_ctx, state->smb2_req->mem_pool);
1892         *_smb2_req = state->smb2_req;
1893         tevent_req_received(req);
1894         return NT_STATUS_OK;
1895 }
1896
1897 static void smbd_smb2_request_incoming(struct tevent_req *subreq);
1898
1899 void smbd_smb2_first_negprot(struct smbd_server_connection *sconn,
1900                              const uint8_t *inbuf, size_t size)
1901 {
1902         NTSTATUS status;
1903         struct smbd_smb2_request *req;
1904         struct tevent_req *subreq;
1905
1906         DEBUG(10,("smbd_smb2_first_negprot: packet length %u\n",
1907                  (unsigned int)size));
1908
1909         status = smbd_initialize_smb2(sconn);
1910         if (!NT_STATUS_IS_OK(status)) {
1911                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1912                 return;
1913         }
1914
1915         status = smbd_smb2_request_create(sconn, inbuf, size, &req);
1916         if (!NT_STATUS_IS_OK(status)) {
1917                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1918                 return;
1919         }
1920
1921         status = smbd_smb2_request_setup_out(req, 1);
1922         if (!NT_STATUS_IS_OK(status)) {
1923                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1924                 return;
1925         }
1926
1927         status = smbd_smb2_request_dispatch(req);
1928         if (!NT_STATUS_IS_OK(status)) {
1929                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1930                 return;
1931         }
1932
1933         /* ask for the next request */
1934         subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
1935         if (subreq == NULL) {
1936                 smbd_server_connection_terminate(sconn, "no memory for reading");
1937                 return;
1938         }
1939         tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
1940 }
1941
1942 static void smbd_smb2_request_incoming(struct tevent_req *subreq)
1943 {
1944         uint16_t creds_requested = 0;
1945         struct smbd_server_connection *sconn = tevent_req_callback_data(subreq,
1946                                                struct smbd_server_connection);
1947         NTSTATUS status;
1948         struct smbd_smb2_request *req = NULL;
1949
1950         status = smbd_smb2_request_read_recv(subreq, sconn, &req);
1951         TALLOC_FREE(subreq);
1952         if (!NT_STATUS_IS_OK(status)) {
1953                 DEBUG(2,("smbd_smb2_request_incoming: client read error %s\n",
1954                         nt_errstr(status)));
1955                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1956                 return;
1957         }
1958
1959         if (req->in.nbt_hdr[0] != 0x00) {
1960                 DEBUG(1,("smbd_smb2_request_incoming: ignore NBT[0x%02X] msg\n",
1961                          req->in.nbt_hdr[0]));
1962                 TALLOC_FREE(req);
1963                 goto next;
1964         }
1965
1966         req->current_idx = 1;
1967
1968         DEBUG(10,("smbd_smb2_request_incoming: idx[%d] of %d vectors\n",
1969                  req->current_idx, req->in.vector_count));
1970
1971         status = smbd_smb2_request_validate(req, &creds_requested);
1972         if (!NT_STATUS_IS_OK(status)) {
1973                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1974                 return;
1975         }
1976
1977         status = smbd_smb2_request_setup_out(req, 5);
1978         if (!NT_STATUS_IS_OK(status)) {
1979                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1980                 return;
1981         }
1982
1983         status = smbd_smb2_request_dispatch(req);
1984         if (!NT_STATUS_IS_OK(status)) {
1985                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1986                 return;
1987         }
1988
1989 next:
1990         /* ask for the next request (this constructs the main loop) */
1991         subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
1992         if (subreq == NULL) {
1993                 smbd_server_connection_terminate(sconn, "no memory for reading");
1994                 return;
1995         }
1996         tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
1997 }