1/* 2 Unix SMB2 implementation. 3 4 Copyright (C) Andrew Tridgell 2005 5 Copyright (C) Stefan Metzmacher 2005 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. 19*/ 20 21#include "includes.h" 22#include "system/time.h" 23#include "libcli/smb2/smb2.h" 24#include "libcli/smb2/smb2_calls.h" 25#include "smb_server/smb_server.h" 26#include "smb_server/smb2/smb2_server.h" 27#include "smbd/service_stream.h" 28#include "lib/stream/packet.h" 29#include "ntvfs/ntvfs.h" 30#include "param/param.h" 31#include "auth/auth.h" 32 33 34/* fill in the bufinfo */ 35void smb2srv_setup_bufinfo(struct smb2srv_request *req) 36{ 37 req->in.bufinfo.mem_ctx = req; 38 req->in.bufinfo.flags = BUFINFO_FLAG_UNICODE | BUFINFO_FLAG_SMB2; 39 req->in.bufinfo.align_base = req->in.buffer; 40 if (req->in.dynamic) { 41 req->in.bufinfo.data = req->in.dynamic; 42 req->in.bufinfo.data_size = req->in.body_size - req->in.body_fixed; 43 } else { 44 req->in.bufinfo.data = NULL; 45 req->in.bufinfo.data_size = 0; 46 } 47} 48 49static int smb2srv_request_destructor(struct smb2srv_request *req) 50{ 51 DLIST_REMOVE(req->smb_conn->requests2.list, req); 52 if (req->pending_id) { 53 idr_remove(req->smb_conn->requests2.idtree_req, req->pending_id); 54 } 55 return 0; 56} 57 58static int smb2srv_request_deny_destructor(struct smb2srv_request *req) 59{ 60 return -1; 61} 62 63struct smb2srv_request *smb2srv_init_request(struct smbsrv_connection *smb_conn) 64{ 65 struct smb2srv_request *req; 66 67 req = talloc_zero(smb_conn, struct smb2srv_request); 68 if (!req) return NULL; 69 70 req->smb_conn = smb_conn; 71 72 talloc_set_destructor(req, smb2srv_request_destructor); 73 74 return req; 75} 76 77NTSTATUS smb2srv_setup_reply(struct smb2srv_request *req, uint16_t body_fixed_size, 78 bool body_dynamic_present, uint32_t body_dynamic_size) 79{ 80 uint32_t flags = SMB2_HDR_FLAG_REDIRECT; 81 uint32_t pid = IVAL(req->in.hdr, SMB2_HDR_PID); 82 uint32_t tid = IVAL(req->in.hdr, SMB2_HDR_TID); 83 84 if (req->pending_id) { 85 flags |= SMB2_HDR_FLAG_ASYNC; 86 pid = req->pending_id; 87 tid = 0; 88 } 89 90 if (body_dynamic_present) { 91 if (body_dynamic_size == 0) { 92 body_dynamic_size = 1; 93 } 94 } else { 95 body_dynamic_size = 0; 96 } 97 98 req->out.size = SMB2_HDR_BODY+NBT_HDR_SIZE+body_fixed_size; 99 100 req->out.allocated = req->out.size + body_dynamic_size; 101 req->out.buffer = talloc_array(req, uint8_t, 102 req->out.allocated); 103 NT_STATUS_HAVE_NO_MEMORY(req->out.buffer); 104 105 req->out.hdr = req->out.buffer + NBT_HDR_SIZE; 106 req->out.body = req->out.hdr + SMB2_HDR_BODY; 107 req->out.body_fixed = body_fixed_size; 108 req->out.body_size = body_fixed_size; 109 req->out.dynamic = (body_dynamic_size ? req->out.body + body_fixed_size : NULL); 110 111 SIVAL(req->out.hdr, 0, SMB2_MAGIC); 112 SSVAL(req->out.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY); 113 SSVAL(req->out.hdr, SMB2_HDR_EPOCH, 0); 114 SIVAL(req->out.hdr, SMB2_HDR_STATUS, NT_STATUS_V(req->status)); 115 SSVAL(req->out.hdr, SMB2_HDR_OPCODE, SVAL(req->in.hdr, SMB2_HDR_OPCODE)); 116 SSVAL(req->out.hdr, SMB2_HDR_CREDIT, 0x0001); 117 SIVAL(req->out.hdr, SMB2_HDR_FLAGS, flags); 118 SIVAL(req->out.hdr, SMB2_HDR_NEXT_COMMAND, 0); 119 SBVAL(req->out.hdr, SMB2_HDR_MESSAGE_ID, req->seqnum); 120 SIVAL(req->out.hdr, SMB2_HDR_PID, pid); 121 SIVAL(req->out.hdr, SMB2_HDR_TID, tid); 122 SBVAL(req->out.hdr, SMB2_HDR_SESSION_ID, BVAL(req->in.hdr, SMB2_HDR_SESSION_ID)); 123 memset(req->out.hdr+SMB2_HDR_SIGNATURE, 0, 16); 124 125 /* set the length of the fixed body part and +1 if there's a dynamic part also */ 126 SSVAL(req->out.body, 0, body_fixed_size + (body_dynamic_size?1:0)); 127 128 /* 129 * if we have a dynamic part, make sure the first byte 130 * which is always be part of the packet is initialized 131 */ 132 if (body_dynamic_size) { 133 req->out.size += 1; 134 SCVAL(req->out.dynamic, 0, 0); 135 } 136 137 return NT_STATUS_OK; 138} 139 140static NTSTATUS smb2srv_reply(struct smb2srv_request *req); 141 142static void smb2srv_chain_reply(struct smb2srv_request *p_req) 143{ 144 NTSTATUS status; 145 struct smb2srv_request *req; 146 uint32_t chain_offset; 147 uint32_t protocol_version; 148 uint16_t buffer_code; 149 uint32_t dynamic_size; 150 uint32_t flags; 151 uint32_t last_hdr_offset; 152 153 last_hdr_offset = p_req->in.hdr - p_req->in.buffer; 154 155 chain_offset = p_req->chain_offset; 156 p_req->chain_offset = 0; 157 158 if (p_req->in.size < (last_hdr_offset + chain_offset + SMB2_MIN_SIZE_NO_BODY)) { 159 DEBUG(2,("Invalid SMB2 chained packet at offset 0x%X from last hdr 0x%X\n", 160 chain_offset, last_hdr_offset)); 161 smbsrv_terminate_connection(p_req->smb_conn, "Invalid SMB2 chained packet"); 162 return; 163 } 164 165 protocol_version = IVAL(p_req->in.buffer, last_hdr_offset + chain_offset); 166 if (protocol_version != SMB2_MAGIC) { 167 DEBUG(2,("Invalid SMB chained packet: protocol prefix: 0x%08X\n", 168 protocol_version)); 169 smbsrv_terminate_connection(p_req->smb_conn, "NON-SMB2 chained packet"); 170 return; 171 } 172 173 req = smb2srv_init_request(p_req->smb_conn); 174 if (!req) { 175 smbsrv_terminate_connection(p_req->smb_conn, "SMB2 chained packet - no memory"); 176 return; 177 } 178 179 req->in.buffer = talloc_steal(req, p_req->in.buffer); 180 req->in.size = p_req->in.size; 181 req->request_time = p_req->request_time; 182 req->in.allocated = req->in.size; 183 184 req->in.hdr = req->in.buffer+ last_hdr_offset + chain_offset; 185 req->in.body = req->in.hdr + SMB2_HDR_BODY; 186 req->in.body_size = req->in.size - (last_hdr_offset+ chain_offset + SMB2_HDR_BODY); 187 req->in.dynamic = NULL; 188 189 req->seqnum = BVAL(req->in.hdr, SMB2_HDR_MESSAGE_ID); 190 191 if (req->in.body_size < 2) { 192 /* error handling for this is different for negprot to 193 other packet types */ 194 uint16_t opcode = SVAL(req->in.hdr, SMB2_HDR_OPCODE); 195 if (opcode == SMB2_OP_NEGPROT) { 196 smbsrv_terminate_connection(req->smb_conn, "Bad body size in SMB2 negprot"); 197 } else { 198 smb2srv_send_error(req, NT_STATUS_INVALID_PARAMETER); 199 } 200 } 201 202 buffer_code = SVAL(req->in.body, 0); 203 req->in.body_fixed = (buffer_code & ~1); 204 dynamic_size = req->in.body_size - req->in.body_fixed; 205 206 if (dynamic_size != 0 && (buffer_code & 1)) { 207 req->in.dynamic = req->in.body + req->in.body_fixed; 208 if (smb2_oob(&req->in, req->in.dynamic, dynamic_size)) { 209 DEBUG(1,("SMB2 chained request invalid dynamic size 0x%x\n", 210 dynamic_size)); 211 smb2srv_send_error(req, NT_STATUS_INVALID_PARAMETER); 212 return; 213 } 214 } 215 216 smb2srv_setup_bufinfo(req); 217 218 flags = IVAL(req->in.hdr, SMB2_HDR_FLAGS); 219 if (flags & SMB2_HDR_FLAG_CHAINED) { 220 if (p_req->chained_file_handle) { 221 memcpy(req->_chained_file_handle, 222 p_req->_chained_file_handle, 223 sizeof(req->_chained_file_handle)); 224 req->chained_file_handle = req->_chained_file_handle; 225 } 226 req->chain_status = p_req->chain_status; 227 } 228 229 /* 230 * TODO: - make sure the length field is 64 231 * - make sure it's a request 232 */ 233 234 status = smb2srv_reply(req); 235 if (!NT_STATUS_IS_OK(status)) { 236 smbsrv_terminate_connection(req->smb_conn, nt_errstr(status)); 237 talloc_free(req); 238 return; 239 } 240} 241 242void smb2srv_send_reply(struct smb2srv_request *req) 243{ 244 DATA_BLOB blob; 245 NTSTATUS status; 246 247 if (req->smb_conn->connection->event.fde == NULL) { 248 /* the socket has been destroyed - no point trying to send a reply! */ 249 talloc_free(req); 250 return; 251 } 252 253 if (req->out.size > NBT_HDR_SIZE) { 254 _smb2_setlen(req->out.buffer, req->out.size - NBT_HDR_SIZE); 255 } 256 257 /* if signing is active on the session then sign the packet */ 258 if (req->is_signed) { 259 status = smb2_sign_message(&req->out, 260 req->session->session_info->session_key); 261 if (!NT_STATUS_IS_OK(status)) { 262 smbsrv_terminate_connection(req->smb_conn, nt_errstr(status)); 263 return; 264 } 265 } 266 267 268 blob = data_blob_const(req->out.buffer, req->out.size); 269 status = packet_send(req->smb_conn->packet, blob); 270 if (!NT_STATUS_IS_OK(status)) { 271 smbsrv_terminate_connection(req->smb_conn, nt_errstr(status)); 272 } 273 if (req->chain_offset) { 274 smb2srv_chain_reply(req); 275 return; 276 } 277 talloc_free(req); 278} 279 280void smb2srv_send_error(struct smb2srv_request *req, NTSTATUS error) 281{ 282 NTSTATUS status; 283 284 if (req->smb_conn->connection->event.fde == NULL) { 285 /* the socket has been destroyed - no point trying to send an error! */ 286 talloc_free(req); 287 return; 288 } 289 290 status = smb2srv_setup_reply(req, 8, true, 0); 291 if (!NT_STATUS_IS_OK(status)) { 292 smbsrv_terminate_connection(req->smb_conn, nt_errstr(status)); 293 talloc_free(req); 294 return; 295 } 296 297 SIVAL(req->out.hdr, SMB2_HDR_STATUS, NT_STATUS_V(error)); 298 299 SSVAL(req->out.body, 0x02, 0); 300 SIVAL(req->out.body, 0x04, 0); 301 302 req->chain_status = NT_STATUS_INVALID_PARAMETER; 303 304 smb2srv_send_reply(req); 305} 306 307static NTSTATUS smb2srv_reply(struct smb2srv_request *req) 308{ 309 uint16_t opcode; 310 uint32_t tid; 311 uint64_t uid; 312 uint32_t flags; 313 314 if (SVAL(req->in.hdr, SMB2_HDR_LENGTH) != SMB2_HDR_BODY) { 315 smbsrv_terminate_connection(req->smb_conn, "Invalid SMB2 header length"); 316 return NT_STATUS_INVALID_PARAMETER; 317 } 318 opcode = SVAL(req->in.hdr, SMB2_HDR_OPCODE); 319 req->chain_offset = IVAL(req->in.hdr, SMB2_HDR_NEXT_COMMAND); 320 req->seqnum = BVAL(req->in.hdr, SMB2_HDR_MESSAGE_ID); 321 tid = IVAL(req->in.hdr, SMB2_HDR_TID); 322 uid = BVAL(req->in.hdr, SMB2_HDR_SESSION_ID); 323 flags = IVAL(req->in.hdr, SMB2_HDR_FLAGS); 324 325 if (req->smb_conn->highest_smb2_seqnum != 0 && 326 req->seqnum <= req->smb_conn->highest_smb2_seqnum) { 327 smbsrv_terminate_connection(req->smb_conn, "Invalid SMB2 sequence number"); 328 return NT_STATUS_INVALID_PARAMETER; 329 } 330 req->smb_conn->highest_smb2_seqnum = req->seqnum; 331 332 req->session = smbsrv_session_find(req->smb_conn, uid, req->request_time); 333 req->tcon = smbsrv_smb2_tcon_find(req->session, tid, req->request_time); 334 335 errno = 0; 336 337 /* supporting signing is mandatory in SMB2, and is per-packet. So we 338 should check the signature on any incoming packet that is signed, and 339 should give a signed reply to any signed request */ 340 if (flags & SMB2_HDR_FLAG_SIGNED) { 341 NTSTATUS status; 342 343 if (!req->session) goto nosession; 344 345 req->is_signed = true; 346 status = smb2_check_signature(&req->in, 347 req->session->session_info->session_key); 348 if (!NT_STATUS_IS_OK(status)) { 349 smb2srv_send_error(req, status); 350 return NT_STATUS_OK; 351 } 352 } else if (req->session && req->session->smb2_signing.active) { 353 /* we require signing and this request was not signed */ 354 smb2srv_send_error(req, NT_STATUS_ACCESS_DENIED); 355 return NT_STATUS_OK; 356 } 357 358 if (!NT_STATUS_IS_OK(req->chain_status)) { 359 smb2srv_send_error(req, req->chain_status); 360 return NT_STATUS_OK; 361 } 362 363 switch (opcode) { 364 case SMB2_OP_NEGPROT: 365 smb2srv_negprot_recv(req); 366 return NT_STATUS_OK; 367 case SMB2_OP_SESSSETUP: 368 smb2srv_sesssetup_recv(req); 369 return NT_STATUS_OK; 370 case SMB2_OP_LOGOFF: 371 if (!req->session) goto nosession; 372 smb2srv_logoff_recv(req); 373 return NT_STATUS_OK; 374 case SMB2_OP_TCON: 375 if (!req->session) goto nosession; 376 smb2srv_tcon_recv(req); 377 return NT_STATUS_OK; 378 case SMB2_OP_TDIS: 379 if (!req->session) goto nosession; 380 if (!req->tcon) goto notcon; 381 smb2srv_tdis_recv(req); 382 return NT_STATUS_OK; 383 case SMB2_OP_CREATE: 384 if (!req->session) goto nosession; 385 if (!req->tcon) goto notcon; 386 smb2srv_create_recv(req); 387 return NT_STATUS_OK; 388 case SMB2_OP_CLOSE: 389 if (!req->session) goto nosession; 390 if (!req->tcon) goto notcon; 391 smb2srv_close_recv(req); 392 return NT_STATUS_OK; 393 case SMB2_OP_FLUSH: 394 if (!req->session) goto nosession; 395 if (!req->tcon) goto notcon; 396 smb2srv_flush_recv(req); 397 return NT_STATUS_OK; 398 case SMB2_OP_READ: 399 if (!req->session) goto nosession; 400 if (!req->tcon) goto notcon; 401 smb2srv_read_recv(req); 402 return NT_STATUS_OK; 403 case SMB2_OP_WRITE: 404 if (!req->session) goto nosession; 405 if (!req->tcon) goto notcon; 406 smb2srv_write_recv(req); 407 return NT_STATUS_OK; 408 case SMB2_OP_LOCK: 409 if (!req->session) goto nosession; 410 if (!req->tcon) goto notcon; 411 smb2srv_lock_recv(req); 412 return NT_STATUS_OK; 413 case SMB2_OP_IOCTL: 414 if (!req->session) goto nosession; 415 if (!req->tcon) goto notcon; 416 smb2srv_ioctl_recv(req); 417 return NT_STATUS_OK; 418 case SMB2_OP_CANCEL: 419 smb2srv_cancel_recv(req); 420 return NT_STATUS_OK; 421 case SMB2_OP_KEEPALIVE: 422 smb2srv_keepalive_recv(req); 423 return NT_STATUS_OK; 424 case SMB2_OP_FIND: 425 if (!req->session) goto nosession; 426 if (!req->tcon) goto notcon; 427 smb2srv_find_recv(req); 428 return NT_STATUS_OK; 429 case SMB2_OP_NOTIFY: 430 if (!req->session) goto nosession; 431 if (!req->tcon) goto notcon; 432 smb2srv_notify_recv(req); 433 return NT_STATUS_OK; 434 case SMB2_OP_GETINFO: 435 if (!req->session) goto nosession; 436 if (!req->tcon) goto notcon; 437 smb2srv_getinfo_recv(req); 438 return NT_STATUS_OK; 439 case SMB2_OP_SETINFO: 440 if (!req->session) goto nosession; 441 if (!req->tcon) goto notcon; 442 smb2srv_setinfo_recv(req); 443 return NT_STATUS_OK; 444 case SMB2_OP_BREAK: 445 if (!req->session) goto nosession; 446 if (!req->tcon) goto notcon; 447 smb2srv_break_recv(req); 448 return NT_STATUS_OK; 449 } 450 451 DEBUG(1,("Invalid SMB2 opcode: 0x%04X\n", opcode)); 452 smbsrv_terminate_connection(req->smb_conn, "Invalid SMB2 opcode"); 453 return NT_STATUS_OK; 454 455nosession: 456 smb2srv_send_error(req, NT_STATUS_USER_SESSION_DELETED); 457 return NT_STATUS_OK; 458notcon: 459 smb2srv_send_error(req, NT_STATUS_NETWORK_NAME_DELETED); 460 return NT_STATUS_OK; 461} 462 463NTSTATUS smbsrv_recv_smb2_request(void *private_data, DATA_BLOB blob) 464{ 465 struct smbsrv_connection *smb_conn = talloc_get_type(private_data, struct smbsrv_connection); 466 struct smb2srv_request *req; 467 struct timeval cur_time = timeval_current(); 468 uint32_t protocol_version; 469 uint16_t buffer_code; 470 uint32_t dynamic_size; 471 uint32_t flags; 472 473 smb_conn->statistics.last_request_time = cur_time; 474 475 /* see if its a special NBT packet */ 476 if (CVAL(blob.data,0) != 0) { 477 DEBUG(2,("Special NBT packet on SMB2 connection")); 478 smbsrv_terminate_connection(smb_conn, "Special NBT packet on SMB2 connection"); 479 return NT_STATUS_OK; 480 } 481 482 if (blob.length < (NBT_HDR_SIZE + SMB2_MIN_SIZE_NO_BODY)) { 483 DEBUG(2,("Invalid SMB2 packet length count %ld\n", (long)blob.length)); 484 smbsrv_terminate_connection(smb_conn, "Invalid SMB2 packet"); 485 return NT_STATUS_OK; 486 } 487 488 protocol_version = IVAL(blob.data, NBT_HDR_SIZE); 489 if (protocol_version != SMB2_MAGIC) { 490 DEBUG(2,("Invalid SMB packet: protocol prefix: 0x%08X\n", 491 protocol_version)); 492 smbsrv_terminate_connection(smb_conn, "NON-SMB2 packet"); 493 return NT_STATUS_OK; 494 } 495 496 req = smb2srv_init_request(smb_conn); 497 NT_STATUS_HAVE_NO_MEMORY(req); 498 499 req->in.buffer = talloc_steal(req, blob.data); 500 req->in.size = blob.length; 501 req->request_time = cur_time; 502 req->in.allocated = req->in.size; 503 504 req->in.hdr = req->in.buffer+ NBT_HDR_SIZE; 505 req->in.body = req->in.hdr + SMB2_HDR_BODY; 506 req->in.body_size = req->in.size - (SMB2_HDR_BODY+NBT_HDR_SIZE); 507 req->in.dynamic = NULL; 508 509 req->seqnum = BVAL(req->in.hdr, SMB2_HDR_MESSAGE_ID); 510 511 if (req->in.body_size < 2) { 512 /* error handling for this is different for negprot to 513 other packet types */ 514 uint16_t opcode = SVAL(req->in.hdr, SMB2_HDR_OPCODE); 515 if (opcode == SMB2_OP_NEGPROT) { 516 smbsrv_terminate_connection(req->smb_conn, "Bad body size in SMB2 negprot"); 517 return NT_STATUS_OK; 518 } else { 519 smb2srv_send_error(req, NT_STATUS_INVALID_PARAMETER); 520 return NT_STATUS_OK; 521 } 522 } 523 524 buffer_code = SVAL(req->in.body, 0); 525 req->in.body_fixed = (buffer_code & ~1); 526 dynamic_size = req->in.body_size - req->in.body_fixed; 527 528 if (dynamic_size != 0 && (buffer_code & 1)) { 529 req->in.dynamic = req->in.body + req->in.body_fixed; 530 if (smb2_oob(&req->in, req->in.dynamic, dynamic_size)) { 531 DEBUG(1,("SMB2 request invalid dynamic size 0x%x\n", 532 dynamic_size)); 533 smb2srv_send_error(req, NT_STATUS_INVALID_PARAMETER); 534 return NT_STATUS_OK; 535 } 536 } 537 538 smb2srv_setup_bufinfo(req); 539 540 /* 541 * TODO: - make sure the length field is 64 542 * - make sure it's a request 543 */ 544 545 flags = IVAL(req->in.hdr, SMB2_HDR_FLAGS); 546 /* the first request should never have the related flag set */ 547 if (flags & SMB2_HDR_FLAG_CHAINED) { 548 req->chain_status = NT_STATUS_INVALID_PARAMETER; 549 } 550 551 return smb2srv_reply(req); 552} 553 554static NTSTATUS smb2srv_init_pending(struct smbsrv_connection *smb_conn) 555{ 556 smb_conn->requests2.idtree_req = idr_init(smb_conn); 557 NT_STATUS_HAVE_NO_MEMORY(smb_conn->requests2.idtree_req); 558 smb_conn->requests2.idtree_limit = 0x00FFFFFF & (UINT32_MAX - 1); 559 smb_conn->requests2.list = NULL; 560 561 return NT_STATUS_OK; 562} 563 564NTSTATUS smb2srv_queue_pending(struct smb2srv_request *req) 565{ 566 NTSTATUS status; 567 bool signing_used = false; 568 int id; 569 570 if (req->pending_id) { 571 return NT_STATUS_INTERNAL_ERROR; 572 } 573 574 id = idr_get_new_above(req->smb_conn->requests2.idtree_req, req, 575 1, req->smb_conn->requests2.idtree_limit); 576 if (id == -1) { 577 return NT_STATUS_INSUFFICIENT_RESOURCES; 578 } 579 580 DLIST_ADD_END(req->smb_conn->requests2.list, req, struct smb2srv_request *); 581 req->pending_id = id; 582 583 if (req->smb_conn->connection->event.fde == NULL) { 584 /* the socket has been destroyed - no point trying to send an error! */ 585 return NT_STATUS_REMOTE_DISCONNECT; 586 } 587 588 talloc_set_destructor(req, smb2srv_request_deny_destructor); 589 590 status = smb2srv_setup_reply(req, 8, true, 0); 591 if (!NT_STATUS_IS_OK(status)) { 592 return status; 593 } 594 595 SIVAL(req->out.hdr, SMB2_HDR_STATUS, NT_STATUS_V(STATUS_PENDING)); 596 597 SSVAL(req->out.body, 0x02, 0); 598 SIVAL(req->out.body, 0x04, 0); 599 600 /* if the real reply will be signed set the signed flags, but don't sign */ 601 if (req->is_signed) { 602 SIVAL(req->out.hdr, SMB2_HDR_FLAGS, IVAL(req->out.hdr, SMB2_HDR_FLAGS) | SMB2_HDR_FLAG_SIGNED); 603 signing_used = req->is_signed; 604 req->is_signed = false; 605 } 606 607 smb2srv_send_reply(req); 608 609 req->is_signed = signing_used; 610 611 talloc_set_destructor(req, smb2srv_request_destructor); 612 return NT_STATUS_OK; 613} 614 615void smb2srv_cancel_recv(struct smb2srv_request *req) 616{ 617 uint32_t pending_id; 618 uint32_t flags; 619 void *p; 620 struct smb2srv_request *r; 621 622 if (!req->session) goto done; 623 624 flags = IVAL(req->in.hdr, SMB2_HDR_FLAGS); 625 pending_id = IVAL(req->in.hdr, SMB2_HDR_PID); 626 627 if (!(flags & SMB2_HDR_FLAG_ASYNC)) { 628 /* TODO: what to do here? */ 629 goto done; 630 } 631 632 p = idr_find(req->smb_conn->requests2.idtree_req, pending_id); 633 if (!p) goto done; 634 635 r = talloc_get_type(p, struct smb2srv_request); 636 if (!r) goto done; 637 638 if (!r->ntvfs) goto done; 639 640 ntvfs_cancel(r->ntvfs); 641 642done: 643 /* we never generate a reply for a SMB2 Cancel */ 644 talloc_free(req); 645} 646 647/* 648 * init the SMB2 protocol related stuff 649 */ 650NTSTATUS smbsrv_init_smb2_connection(struct smbsrv_connection *smb_conn) 651{ 652 NTSTATUS status; 653 654 /* now initialise a few default values associated with this smb socket */ 655 smb_conn->negotiate.max_send = 0xFFFF; 656 657 /* this is the size that w2k uses, and it appears to be important for 658 good performance */ 659 smb_conn->negotiate.max_recv = lp_max_xmit(smb_conn->lp_ctx); 660 661 smb_conn->negotiate.zone_offset = get_time_zone(time(NULL)); 662 663 smb_conn->config.security = SEC_USER; 664 smb_conn->config.nt_status_support = true; 665 666 status = smbsrv_init_sessions(smb_conn, UINT64_MAX); 667 NT_STATUS_NOT_OK_RETURN(status); 668 669 status = smb2srv_init_pending(smb_conn); 670 NT_STATUS_NOT_OK_RETURN(status); 671 672 return NT_STATUS_OK; 673 674} 675