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s4:smb_server/smb2: don't reset highest_smb2_seqnum on SMB2 Cancel
[Samba/fernandojvsilva.git] / source4 / smb_server / smb2 / receive.c
blob26995b71ec4cd602e81bcf21c6607cc36a36bf3f
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 */
35 void 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
49 static 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
58 static int smb2srv_request_deny_destructor(struct smb2srv_request *req)
59 {
60 return -1;
61 }
62
63 struct 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
77 NTSTATUS 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
140 static NTSTATUS smb2srv_reply(struct smb2srv_request *req);
141
142 static 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
242 void 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
280 void 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
307 static 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 (opcode != SMB2_OP_CANCEL &&
326 req->smb_conn->highest_smb2_seqnum != 0 &&
327 req->seqnum <= req->smb_conn->highest_smb2_seqnum) {
328 smbsrv_terminate_connection(req->smb_conn, "Invalid SMB2 sequence number");
329 return NT_STATUS_INVALID_PARAMETER;
330 }
331 if (opcode != SMB2_OP_CANCEL) {
332 req->smb_conn->highest_smb2_seqnum = req->seqnum;
333 }
334
335 req->session = smbsrv_session_find(req->smb_conn, uid, req->request_time);
336 req->tcon = smbsrv_smb2_tcon_find(req->session, tid, req->request_time);
337
338 errno = 0;
339
340 /* supporting signing is mandatory in SMB2, and is per-packet. So we
341 should check the signature on any incoming packet that is signed, and
342 should give a signed reply to any signed request */
343 if (flags & SMB2_HDR_FLAG_SIGNED) {
344 NTSTATUS status;
345
346 if (!req->session) goto nosession;
347
348 req->is_signed = true;
349 status = smb2_check_signature(&req->in,
350 req->session->session_info->session_key);
351 if (!NT_STATUS_IS_OK(status)) {
352 smb2srv_send_error(req, status);
353 return NT_STATUS_OK;
354 }
355 } else if (req->session && req->session->smb2_signing.active) {
356 /* we require signing and this request was not signed */
357 smb2srv_send_error(req, NT_STATUS_ACCESS_DENIED);
358 return NT_STATUS_OK;
359 }
360
361 if (!NT_STATUS_IS_OK(req->chain_status)) {
362 smb2srv_send_error(req, req->chain_status);
363 return NT_STATUS_OK;
364 }
365
366 switch (opcode) {
367 case SMB2_OP_NEGPROT:
368 smb2srv_negprot_recv(req);
369 return NT_STATUS_OK;
370 case SMB2_OP_SESSSETUP:
371 smb2srv_sesssetup_recv(req);
372 return NT_STATUS_OK;
373 case SMB2_OP_LOGOFF:
374 if (!req->session) goto nosession;
375 smb2srv_logoff_recv(req);
376 return NT_STATUS_OK;
377 case SMB2_OP_TCON:
378 if (!req->session) goto nosession;
379 smb2srv_tcon_recv(req);
380 return NT_STATUS_OK;
381 case SMB2_OP_TDIS:
382 if (!req->session) goto nosession;
383 if (!req->tcon) goto notcon;
384 smb2srv_tdis_recv(req);
385 return NT_STATUS_OK;
386 case SMB2_OP_CREATE:
387 if (!req->session) goto nosession;
388 if (!req->tcon) goto notcon;
389 smb2srv_create_recv(req);
390 return NT_STATUS_OK;
391 case SMB2_OP_CLOSE:
392 if (!req->session) goto nosession;
393 if (!req->tcon) goto notcon;
394 smb2srv_close_recv(req);
395 return NT_STATUS_OK;
396 case SMB2_OP_FLUSH:
397 if (!req->session) goto nosession;
398 if (!req->tcon) goto notcon;
399 smb2srv_flush_recv(req);
400 return NT_STATUS_OK;
401 case SMB2_OP_READ:
402 if (!req->session) goto nosession;
403 if (!req->tcon) goto notcon;
404 smb2srv_read_recv(req);
405 return NT_STATUS_OK;
406 case SMB2_OP_WRITE:
407 if (!req->session) goto nosession;
408 if (!req->tcon) goto notcon;
409 smb2srv_write_recv(req);
410 return NT_STATUS_OK;
411 case SMB2_OP_LOCK:
412 if (!req->session) goto nosession;
413 if (!req->tcon) goto notcon;
414 smb2srv_lock_recv(req);
415 return NT_STATUS_OK;
416 case SMB2_OP_IOCTL:
417 if (!req->session) goto nosession;
418 if (!req->tcon) goto notcon;
419 smb2srv_ioctl_recv(req);
420 return NT_STATUS_OK;
421 case SMB2_OP_CANCEL:
422 smb2srv_cancel_recv(req);
423 return NT_STATUS_OK;
424 case SMB2_OP_KEEPALIVE:
425 smb2srv_keepalive_recv(req);
426 return NT_STATUS_OK;
427 case SMB2_OP_FIND:
428 if (!req->session) goto nosession;
429 if (!req->tcon) goto notcon;
430 smb2srv_find_recv(req);
431 return NT_STATUS_OK;
432 case SMB2_OP_NOTIFY:
433 if (!req->session) goto nosession;
434 if (!req->tcon) goto notcon;
435 smb2srv_notify_recv(req);
436 return NT_STATUS_OK;
437 case SMB2_OP_GETINFO:
438 if (!req->session) goto nosession;
439 if (!req->tcon) goto notcon;
440 smb2srv_getinfo_recv(req);
441 return NT_STATUS_OK;
442 case SMB2_OP_SETINFO:
443 if (!req->session) goto nosession;
444 if (!req->tcon) goto notcon;
445 smb2srv_setinfo_recv(req);
446 return NT_STATUS_OK;
447 case SMB2_OP_BREAK:
448 if (!req->session) goto nosession;
449 if (!req->tcon) goto notcon;
450 smb2srv_break_recv(req);
451 return NT_STATUS_OK;
452 }
453
454 DEBUG(1,("Invalid SMB2 opcode: 0x%04X\n", opcode));
455 smbsrv_terminate_connection(req->smb_conn, "Invalid SMB2 opcode");
456 return NT_STATUS_OK;
457
458 nosession:
459 smb2srv_send_error(req, NT_STATUS_USER_SESSION_DELETED);
460 return NT_STATUS_OK;
461 notcon:
462 smb2srv_send_error(req, NT_STATUS_NETWORK_NAME_DELETED);
463 return NT_STATUS_OK;
464 }
465
466 NTSTATUS smbsrv_recv_smb2_request(void *private_data, DATA_BLOB blob)
467 {
468 struct smbsrv_connection *smb_conn = talloc_get_type(private_data, struct smbsrv_connection);
469 struct smb2srv_request *req;
470 struct timeval cur_time = timeval_current();
471 uint32_t protocol_version;
472 uint16_t buffer_code;
473 uint32_t dynamic_size;
474 uint32_t flags;
475
476 smb_conn->statistics.last_request_time = cur_time;
477
478 /* see if its a special NBT packet */
479 if (CVAL(blob.data,0) != 0) {
480 DEBUG(2,("Special NBT packet on SMB2 connection"));
481 smbsrv_terminate_connection(smb_conn, "Special NBT packet on SMB2 connection");
482 return NT_STATUS_OK;
483 }
484
485 if (blob.length < (NBT_HDR_SIZE + SMB2_MIN_SIZE_NO_BODY)) {
486 DEBUG(2,("Invalid SMB2 packet length count %ld\n", (long)blob.length));
487 smbsrv_terminate_connection(smb_conn, "Invalid SMB2 packet");
488 return NT_STATUS_OK;
489 }
490
491 protocol_version = IVAL(blob.data, NBT_HDR_SIZE);
492 if (protocol_version != SMB2_MAGIC) {
493 DEBUG(2,("Invalid SMB packet: protocol prefix: 0x%08X\n",
494 protocol_version));
495 smbsrv_terminate_connection(smb_conn, "NON-SMB2 packet");
496 return NT_STATUS_OK;
497 }
498
499 req = smb2srv_init_request(smb_conn);
500 NT_STATUS_HAVE_NO_MEMORY(req);
501
502 req->in.buffer = talloc_steal(req, blob.data);
503 req->in.size = blob.length;
504 req->request_time = cur_time;
505 req->in.allocated = req->in.size;
506
507 req->in.hdr = req->in.buffer+ NBT_HDR_SIZE;
508 req->in.body = req->in.hdr + SMB2_HDR_BODY;
509 req->in.body_size = req->in.size - (SMB2_HDR_BODY+NBT_HDR_SIZE);
510 req->in.dynamic = NULL;
511
512 req->seqnum = BVAL(req->in.hdr, SMB2_HDR_MESSAGE_ID);
513
514 if (req->in.body_size < 2) {
515 /* error handling for this is different for negprot to
516 other packet types */
517 uint16_t opcode = SVAL(req->in.hdr, SMB2_HDR_OPCODE);
518 if (opcode == SMB2_OP_NEGPROT) {
519 smbsrv_terminate_connection(req->smb_conn, "Bad body size in SMB2 negprot");
520 return NT_STATUS_OK;
521 } else {
522 smb2srv_send_error(req, NT_STATUS_INVALID_PARAMETER);
523 return NT_STATUS_OK;
524 }
525 }
526
527 buffer_code = SVAL(req->in.body, 0);
528 req->in.body_fixed = (buffer_code & ~1);
529 dynamic_size = req->in.body_size - req->in.body_fixed;
530
531 if (dynamic_size != 0 && (buffer_code & 1)) {
532 req->in.dynamic = req->in.body + req->in.body_fixed;
533 if (smb2_oob(&req->in, req->in.dynamic, dynamic_size)) {
534 DEBUG(1,("SMB2 request invalid dynamic size 0x%x\n",
535 dynamic_size));
536 smb2srv_send_error(req, NT_STATUS_INVALID_PARAMETER);
537 return NT_STATUS_OK;
538 }
539 }
540
541 smb2srv_setup_bufinfo(req);
542
543 /*
544 * TODO: - make sure the length field is 64
545 * - make sure it's a request
546 */
547
548 flags = IVAL(req->in.hdr, SMB2_HDR_FLAGS);
549 /* the first request should never have the related flag set */
550 if (flags & SMB2_HDR_FLAG_CHAINED) {
551 req->chain_status = NT_STATUS_INVALID_PARAMETER;
552 }
553
554 return smb2srv_reply(req);
555 }
556
557 static NTSTATUS smb2srv_init_pending(struct smbsrv_connection *smb_conn)
558 {
559 smb_conn->requests2.idtree_req = idr_init(smb_conn);
560 NT_STATUS_HAVE_NO_MEMORY(smb_conn->requests2.idtree_req);
561 smb_conn->requests2.idtree_limit = 0x00FFFFFF & (UINT32_MAX - 1);
562 smb_conn->requests2.list = NULL;
563
564 return NT_STATUS_OK;
565 }
566
567 NTSTATUS smb2srv_queue_pending(struct smb2srv_request *req)
568 {
569 NTSTATUS status;
570 bool signing_used = false;
571 int id;
572
573 if (req->pending_id) {
574 return NT_STATUS_INTERNAL_ERROR;
575 }
576
577 id = idr_get_new_above(req->smb_conn->requests2.idtree_req, req,
578 1, req->smb_conn->requests2.idtree_limit);
579 if (id == -1) {
580 return NT_STATUS_INSUFFICIENT_RESOURCES;
581 }
582
583 DLIST_ADD_END(req->smb_conn->requests2.list, req, struct smb2srv_request *);
584 req->pending_id = id;
585
586 if (req->smb_conn->connection->event.fde == NULL) {
587 /* the socket has been destroyed - no point trying to send an error! */
588 return NT_STATUS_REMOTE_DISCONNECT;
589 }
590
591 talloc_set_destructor(req, smb2srv_request_deny_destructor);
592
593 status = smb2srv_setup_reply(req, 8, true, 0);
594 if (!NT_STATUS_IS_OK(status)) {
595 return status;
596 }
597
598 SIVAL(req->out.hdr, SMB2_HDR_STATUS, NT_STATUS_V(STATUS_PENDING));
599
600 SSVAL(req->out.body, 0x02, 0);
601 SIVAL(req->out.body, 0x04, 0);
602
603 /* if the real reply will be signed set the signed flags, but don't sign */
604 if (req->is_signed) {
605 SIVAL(req->out.hdr, SMB2_HDR_FLAGS, IVAL(req->out.hdr, SMB2_HDR_FLAGS) | SMB2_HDR_FLAG_SIGNED);
606 signing_used = req->is_signed;
607 req->is_signed = false;
608 }
609
610 smb2srv_send_reply(req);
611
612 req->is_signed = signing_used;
613
614 talloc_set_destructor(req, smb2srv_request_destructor);
615 return NT_STATUS_OK;
616 }
617
618 void smb2srv_cancel_recv(struct smb2srv_request *req)
619 {
620 uint32_t pending_id;
621 uint32_t flags;
622 void *p;
623 struct smb2srv_request *r;
624
625 if (!req->session) goto done;
626
627 flags = IVAL(req->in.hdr, SMB2_HDR_FLAGS);
628 pending_id = IVAL(req->in.hdr, SMB2_HDR_PID);
629
630 if (!(flags & SMB2_HDR_FLAG_ASYNC)) {
631 /* TODO: what to do here? */
632 goto done;
633 }
634
635 p = idr_find(req->smb_conn->requests2.idtree_req, pending_id);
636 if (!p) goto done;
637
638 r = talloc_get_type(p, struct smb2srv_request);
639 if (!r) goto done;
640
641 if (!r->ntvfs) goto done;
642
643 ntvfs_cancel(r->ntvfs);
644
645 done:
646 /* we never generate a reply for a SMB2 Cancel */
647 talloc_free(req);
648 }
649
650 /*
651 * init the SMB2 protocol related stuff
652 */
653 NTSTATUS smbsrv_init_smb2_connection(struct smbsrv_connection *smb_conn)
654 {
655 NTSTATUS status;
656
657 /* now initialise a few default values associated with this smb socket */
658 smb_conn->negotiate.max_send = 0xFFFF;
659
660 /* this is the size that w2k uses, and it appears to be important for
661 good performance */
662 smb_conn->negotiate.max_recv = lp_max_xmit(smb_conn->lp_ctx);
663
664 smb_conn->negotiate.zone_offset = get_time_zone(time(NULL));
665
666 smb_conn->config.security = SEC_USER;
667 smb_conn->config.nt_status_support = true;
668
669 status = smbsrv_init_sessions(smb_conn, UINT64_MAX);
670 NT_STATUS_NOT_OK_RETURN(status);
671
672 status = smb2srv_init_pending(smb_conn);
673 NT_STATUS_NOT_OK_RETURN(status);
674
675 return NT_STATUS_OK;
676
677 }
fernandojvsilva's samba4 branch