source: vendor/3.5.8/source3/smbd/smb2_server.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 16 years ago

Samba 3.5.0: Initial import
File size: 39.6 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 Core SMB2 server
4
5 Copyright (C) Stefan Metzmacher 2009
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19*/
20
21#include "includes.h"
22#include "smbd/globals.h"
23#include "../libcli/smb/smb_common.h"
24#include "../lib/tsocket/tsocket.h"
25
26bool smbd_is_smb2_header(const uint8_t *inbuf, size_t size)
27{
28 if (size < (4 + SMB2_HDR_BODY)) {
29 return false;
30 }
31
32 if (IVAL(inbuf, 4) != SMB2_MAGIC) {
33 return false;
34 }
35
36 return true;
37}
38
39static NTSTATUS smbd_initialize_smb2(struct smbd_server_connection *sconn)
40{
41 NTSTATUS status;
42 int ret;
43
44 TALLOC_FREE(sconn->smb1.fde);
45
46 sconn->smb2.event_ctx = smbd_event_context();
47
48 sconn->smb2.recv_queue = tevent_queue_create(sconn, "smb2 recv queue");
49 if (sconn->smb2.recv_queue == NULL) {
50 return NT_STATUS_NO_MEMORY;
51 }
52
53 sconn->smb2.send_queue = tevent_queue_create(sconn, "smb2 send queue");
54 if (sconn->smb2.send_queue == NULL) {
55 return NT_STATUS_NO_MEMORY;
56 }
57
58 sconn->smb2.sessions.idtree = idr_init(sconn);
59 if (sconn->smb2.sessions.idtree == NULL) {
60 return NT_STATUS_NO_MEMORY;
61 }
62 sconn->smb2.sessions.limit = 0x0000FFFE;
63 sconn->smb2.sessions.list = NULL;
64
65 ret = tstream_bsd_existing_socket(sconn, smbd_server_fd(),
66 &sconn->smb2.stream);
67 if (ret == -1) {
68 status = map_nt_error_from_unix(errno);
69 return status;
70 }
71
72 /* Ensure child is set to non-blocking mode */
73 set_blocking(smbd_server_fd(),false);
74 return NT_STATUS_OK;
75}
76
77#define smb2_len(buf) (PVAL(buf,3)|(PVAL(buf,2)<<8)|(PVAL(buf,1)<<16))
78#define _smb2_setlen(_buf,len) do { \
79 uint8_t *buf = (uint8_t *)_buf; \
80 buf[0] = 0; \
81 buf[1] = ((len)&0xFF0000)>>16; \
82 buf[2] = ((len)&0xFF00)>>8; \
83 buf[3] = (len)&0xFF; \
84} while (0)
85
86static void smb2_setup_nbt_length(struct iovec *vector, int count)
87{
88 size_t len = 0;
89 int i;
90
91 for (i=1; i < count; i++) {
92 len += vector[i].iov_len;
93 }
94
95 _smb2_setlen(vector[0].iov_base, len);
96}
97
98static int smbd_smb2_request_parent_destructor(struct smbd_smb2_request **req)
99{
100 if (*req) {
101 (*req)->parent = NULL;
102 (*req)->mem_pool = NULL;
103 }
104
105 return 0;
106}
107
108static int smbd_smb2_request_destructor(struct smbd_smb2_request *req)
109{
110 if (req->out.vector) {
111 DLIST_REMOVE(req->sconn->smb2.requests, req);
112 }
113
114 if (req->parent) {
115 *req->parent = NULL;
116 talloc_free(req->mem_pool);
117 }
118
119 return 0;
120}
121
122static struct smbd_smb2_request *smbd_smb2_request_allocate(TALLOC_CTX *mem_ctx)
123{
124 TALLOC_CTX *mem_pool;
125 struct smbd_smb2_request **parent;
126 struct smbd_smb2_request *req;
127
128 mem_pool = talloc_pool(mem_ctx, 8192);
129 if (mem_pool == NULL) {
130 return NULL;
131 }
132
133 parent = talloc(mem_pool, struct smbd_smb2_request *);
134 if (parent == NULL) {
135 talloc_free(mem_pool);
136 return NULL;
137 }
138
139 req = talloc_zero(parent, struct smbd_smb2_request);
140 if (req == NULL) {
141 talloc_free(mem_pool);
142 return NULL;
143 }
144 *parent = req;
145 req->mem_pool = mem_pool;
146 req->parent = parent;
147
148 talloc_set_destructor(parent, smbd_smb2_request_parent_destructor);
149 talloc_set_destructor(req, smbd_smb2_request_destructor);
150
151 return req;
152}
153
154static NTSTATUS smbd_smb2_request_create(struct smbd_server_connection *sconn,
155 const uint8_t *inbuf, size_t size,
156 struct smbd_smb2_request **_req)
157{
158 struct smbd_smb2_request *req;
159 uint32_t protocol_version;
160 const uint8_t *inhdr = NULL;
161 off_t ofs = 0;
162 uint16_t cmd;
163 uint32_t next_command_ofs;
164
165 if (size < (4 + SMB2_HDR_BODY + 2)) {
166 DEBUG(0,("Invalid SMB2 packet length count %ld\n", (long)size));
167 return NT_STATUS_INVALID_PARAMETER;
168 }
169
170 inhdr = inbuf + 4;
171
172 protocol_version = IVAL(inhdr, SMB2_HDR_PROTOCOL_ID);
173 if (protocol_version != SMB2_MAGIC) {
174 DEBUG(0,("Invalid SMB packet: protocol prefix: 0x%08X\n",
175 protocol_version));
176 return NT_STATUS_INVALID_PARAMETER;
177 }
178
179 cmd = SVAL(inhdr, SMB2_HDR_OPCODE);
180 if (cmd != SMB2_OP_NEGPROT) {
181 DEBUG(0,("Invalid SMB packet: first request: 0x%04X\n",
182 cmd));
183 return NT_STATUS_INVALID_PARAMETER;
184 }
185
186 next_command_ofs = IVAL(inhdr, SMB2_HDR_NEXT_COMMAND);
187 if (next_command_ofs != 0) {
188 DEBUG(0,("Invalid SMB packet: next_command: 0x%08X\n",
189 next_command_ofs));
190 return NT_STATUS_INVALID_PARAMETER;
191 }
192
193 req = smbd_smb2_request_allocate(sconn);
194 if (req == NULL) {
195 return NT_STATUS_NO_MEMORY;
196 }
197 req->sconn = sconn;
198
199 talloc_steal(req, inbuf);
200
201 req->in.vector = talloc_array(req, struct iovec, 4);
202 if (req->in.vector == NULL) {
203 TALLOC_FREE(req);
204 return NT_STATUS_NO_MEMORY;
205 }
206 req->in.vector_count = 4;
207
208 memcpy(req->in.nbt_hdr, inbuf, 4);
209
210 ofs = 0;
211 req->in.vector[0].iov_base = (void *)req->in.nbt_hdr;
212 req->in.vector[0].iov_len = 4;
213 ofs += req->in.vector[0].iov_len;
214
215 req->in.vector[1].iov_base = (void *)(inbuf + ofs);
216 req->in.vector[1].iov_len = SMB2_HDR_BODY;
217 ofs += req->in.vector[1].iov_len;
218
219 req->in.vector[2].iov_base = (void *)(inbuf + ofs);
220 req->in.vector[2].iov_len = SVAL(inbuf, ofs) & 0xFFFE;
221 ofs += req->in.vector[2].iov_len;
222
223 if (ofs > size) {
224 return NT_STATUS_INVALID_PARAMETER;
225 }
226
227 req->in.vector[3].iov_base = (void *)(inbuf + ofs);
228 req->in.vector[3].iov_len = size - ofs;
229 ofs += req->in.vector[3].iov_len;
230
231 req->current_idx = 1;
232
233 *_req = req;
234 return NT_STATUS_OK;
235}
236
237static NTSTATUS smbd_smb2_request_validate(struct smbd_smb2_request *req)
238{
239 int count;
240 int idx;
241 bool compound_related = false;
242
243 count = req->in.vector_count;
244
245 if (count < 4) {
246 /* It's not a SMB2 request */
247 return NT_STATUS_INVALID_PARAMETER;
248 }
249
250 for (idx=1; idx < count; idx += 3) {
251 const uint8_t *inhdr = NULL;
252 uint32_t flags;
253
254 if (req->in.vector[idx].iov_len != SMB2_HDR_BODY) {
255 return NT_STATUS_INVALID_PARAMETER;
256 }
257
258 if (req->in.vector[idx+1].iov_len < 2) {
259 return NT_STATUS_INVALID_PARAMETER;
260 }
261
262 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
263
264 /* setup the SMB2 header */
265 if (IVAL(inhdr, SMB2_HDR_PROTOCOL_ID) != SMB2_MAGIC) {
266 return NT_STATUS_INVALID_PARAMETER;
267 }
268
269 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
270 if (idx == 1) {
271 /*
272 * the 1st request should never have the
273 * SMB2_HDR_FLAG_CHAINED flag set
274 */
275 if (flags & SMB2_HDR_FLAG_CHAINED) {
276 req->next_status = NT_STATUS_INVALID_PARAMETER;
277 return NT_STATUS_OK;
278 }
279 } else if (idx == 4) {
280 /*
281 * the 2nd request triggers related vs. unrelated
282 * compounded requests
283 */
284 if (flags & SMB2_HDR_FLAG_CHAINED) {
285 compound_related = true;
286 }
287 } else if (idx > 4) {
288#if 0
289 /*
290 * It seems the this tests are wrong
291 * see the SMB2-COMPOUND test
292 */
293
294 /*
295 * all other requests should match the 2nd one
296 */
297 if (flags & SMB2_HDR_FLAG_CHAINED) {
298 if (!compound_related) {
299 req->next_status =
300 NT_STATUS_INVALID_PARAMETER;
301 return NT_STATUS_OK;
302 }
303 } else {
304 if (compound_related) {
305 req->next_status =
306 NT_STATUS_INVALID_PARAMETER;
307 return NT_STATUS_OK;
308 }
309 }
310#endif
311 }
312 }
313
314 return NT_STATUS_OK;
315}
316
317static NTSTATUS smbd_smb2_request_setup_out(struct smbd_smb2_request *req)
318{
319 struct iovec *vector;
320 int count;
321 int idx;
322
323 count = req->in.vector_count;
324 vector = talloc_array(req, struct iovec, count);
325 if (vector == NULL) {
326 return NT_STATUS_NO_MEMORY;
327 }
328
329 vector[0].iov_base = req->out.nbt_hdr;
330 vector[0].iov_len = 4;
331 SIVAL(req->out.nbt_hdr, 0, 0);
332
333 for (idx=1; idx < count; idx += 3) {
334 const uint8_t *inhdr = NULL;
335 uint32_t in_flags;
336 uint8_t *outhdr = NULL;
337 uint8_t *outbody = NULL;
338 uint32_t next_command_ofs = 0;
339 struct iovec *current = &vector[idx];
340
341 if ((idx + 3) < count) {
342 /* we have a next command */
343 next_command_ofs = SMB2_HDR_BODY + 8;
344 }
345
346 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
347 in_flags = IVAL(inhdr, SMB2_HDR_FLAGS);
348
349 outhdr = talloc_array(vector, uint8_t,
350 SMB2_HDR_BODY + 8);
351 if (outhdr == NULL) {
352 return NT_STATUS_NO_MEMORY;
353 }
354
355 outbody = outhdr + SMB2_HDR_BODY;
356
357 current[0].iov_base = (void *)outhdr;
358 current[0].iov_len = SMB2_HDR_BODY;
359
360 current[1].iov_base = (void *)outbody;
361 current[1].iov_len = 8;
362
363 current[2].iov_base = NULL;
364 current[2].iov_len = 0;
365
366 /* setup the SMB2 header */
367 SIVAL(outhdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
368 SSVAL(outhdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
369 SSVAL(outhdr, SMB2_HDR_EPOCH, 0);
370 SIVAL(outhdr, SMB2_HDR_STATUS,
371 NT_STATUS_V(NT_STATUS_INTERNAL_ERROR));
372 SSVAL(outhdr, SMB2_HDR_OPCODE,
373 SVAL(inhdr, SMB2_HDR_OPCODE));
374 /* Make up a number for now... JRA. FIXME ! FIXME !*/
375 SSVAL(outhdr, SMB2_HDR_CREDIT, 20);
376 SIVAL(outhdr, SMB2_HDR_FLAGS,
377 IVAL(inhdr, SMB2_HDR_FLAGS) | SMB2_HDR_FLAG_REDIRECT);
378 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
379 SBVAL(outhdr, SMB2_HDR_MESSAGE_ID,
380 BVAL(inhdr, SMB2_HDR_MESSAGE_ID));
381 SIVAL(outhdr, SMB2_HDR_PID,
382 IVAL(inhdr, SMB2_HDR_PID));
383 SIVAL(outhdr, SMB2_HDR_TID,
384 IVAL(inhdr, SMB2_HDR_TID));
385 SBVAL(outhdr, SMB2_HDR_SESSION_ID,
386 BVAL(inhdr, SMB2_HDR_SESSION_ID));
387 memset(outhdr + SMB2_HDR_SIGNATURE, 0, 16);
388
389 /* setup error body header */
390 SSVAL(outbody, 0x00, 0x08 + 1);
391 SSVAL(outbody, 0x02, 0);
392 SIVAL(outbody, 0x04, 0);
393 }
394
395 req->out.vector = vector;
396 req->out.vector_count = count;
397
398 /* setup the length of the NBT packet */
399 smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
400
401 DLIST_ADD_END(req->sconn->smb2.requests, req, struct smbd_smb2_request *);
402
403 return NT_STATUS_OK;
404}
405
406void smbd_server_connection_terminate_ex(struct smbd_server_connection *sconn,
407 const char *reason,
408 const char *location)
409{
410 DEBUG(10,("smbd_server_connection_terminate_ex: reason[%s] at %s\n",
411 reason, location));
412 exit_server_cleanly(reason);
413}
414
415struct smbd_smb2_request_pending_state {
416 struct smbd_server_connection *sconn;
417 uint8_t buf[4 + SMB2_HDR_BODY + 0x08];
418 struct iovec vector;
419};
420
421static void smbd_smb2_request_pending_writev_done(struct tevent_req *subreq);
422
423NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req,
424 struct tevent_req *subreq)
425{
426 struct smbd_smb2_request_pending_state *state;
427 uint8_t *outhdr;
428 int i = req->current_idx;
429 uint32_t flags;
430 uint64_t message_id;
431 uint64_t async_id;
432 uint8_t *hdr;
433 uint8_t *body;
434
435 if (!tevent_req_is_in_progress(subreq)) {
436 return NT_STATUS_OK;
437 }
438
439 req->subreq = subreq;
440 subreq = NULL;
441
442 outhdr = (uint8_t *)req->out.vector[i].iov_base;
443
444 flags = IVAL(outhdr, SMB2_HDR_FLAGS);
445 message_id = BVAL(outhdr, SMB2_HDR_MESSAGE_ID);
446
447 async_id = message_id; /* keep it simple for now... */
448 SIVAL(outhdr, SMB2_HDR_FLAGS, flags | SMB2_HDR_FLAG_ASYNC);
449 SBVAL(outhdr, SMB2_HDR_PID, async_id);
450
451 /* TODO: add a paramter to delay this */
452 state = talloc(req->sconn, struct smbd_smb2_request_pending_state);
453 if (state == NULL) {
454 return NT_STATUS_NO_MEMORY;
455 }
456 state->sconn = req->sconn;
457
458 state->vector.iov_base = (void *)state->buf;
459 state->vector.iov_len = sizeof(state->buf);
460
461 _smb2_setlen(state->buf, sizeof(state->buf) - 4);
462 hdr = state->buf + 4;
463 body = hdr + SMB2_HDR_BODY;
464
465 SIVAL(hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
466 SSVAL(hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
467 SSVAL(hdr, SMB2_HDR_EPOCH, 0);
468 SIVAL(hdr, SMB2_HDR_STATUS, NT_STATUS_V(STATUS_PENDING));
469 SSVAL(hdr, SMB2_HDR_OPCODE,
470 SVAL(outhdr, SMB2_HDR_OPCODE));
471 SSVAL(hdr, SMB2_HDR_CREDIT, 1);
472 SIVAL(hdr, SMB2_HDR_FLAGS,
473 IVAL(outhdr, SMB2_HDR_FLAGS));
474 SIVAL(hdr, SMB2_HDR_NEXT_COMMAND, 0);
475 SBVAL(hdr, SMB2_HDR_MESSAGE_ID,
476 BVAL(outhdr, SMB2_HDR_MESSAGE_ID));
477 SBVAL(hdr, SMB2_HDR_PID,
478 BVAL(outhdr, SMB2_HDR_PID));
479 SBVAL(hdr, SMB2_HDR_SESSION_ID,
480 BVAL(outhdr, SMB2_HDR_SESSION_ID));
481 memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
482
483 SSVAL(body, 0x00, 0x08 + 1);
484
485 SCVAL(body, 0x02, 0);
486 SCVAL(body, 0x03, 0);
487 SIVAL(body, 0x04, 0);
488
489 subreq = tstream_writev_queue_send(state,
490 req->sconn->smb2.event_ctx,
491 req->sconn->smb2.stream,
492 req->sconn->smb2.send_queue,
493 &state->vector, 1);
494 if (subreq == NULL) {
495 return NT_STATUS_NO_MEMORY;
496 }
497 tevent_req_set_callback(subreq,
498 smbd_smb2_request_pending_writev_done,
499 state);
500
501 return NT_STATUS_OK;
502}
503
504static void smbd_smb2_request_pending_writev_done(struct tevent_req *subreq)
505{
506 struct smbd_smb2_request_pending_state *state =
507 tevent_req_callback_data(subreq,
508 struct smbd_smb2_request_pending_state);
509 struct smbd_server_connection *sconn = state->sconn;
510 int ret;
511 int sys_errno;
512
513 ret = tstream_writev_queue_recv(subreq, &sys_errno);
514 TALLOC_FREE(subreq);
515 if (ret == -1) {
516 NTSTATUS status = map_nt_error_from_unix(sys_errno);
517 smbd_server_connection_terminate(sconn, nt_errstr(status));
518 return;
519 }
520
521 TALLOC_FREE(state);
522}
523
524static NTSTATUS smbd_smb2_request_process_cancel(struct smbd_smb2_request *req)
525{
526 struct smbd_server_connection *sconn = req->sconn;
527 struct smbd_smb2_request *cur;
528 const uint8_t *inhdr;
529 int i = req->current_idx;
530 uint32_t flags;
531 uint64_t search_message_id;
532 uint64_t search_async_id;
533
534 inhdr = (const uint8_t *)req->in.vector[i].iov_base;
535
536 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
537 search_message_id = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
538 search_async_id = BVAL(inhdr, SMB2_HDR_PID);
539
540 /*
541 * we don't need the request anymore
542 * cancel requests never have a response
543 */
544 TALLOC_FREE(req);
545
546 for (cur = sconn->smb2.requests; cur; cur = cur->next) {
547 const uint8_t *outhdr;
548 uint64_t message_id;
549 uint64_t async_id;
550
551 i = cur->current_idx;
552
553 outhdr = (const uint8_t *)cur->out.vector[i].iov_base;
554
555 message_id = BVAL(outhdr, SMB2_HDR_MESSAGE_ID);
556 async_id = BVAL(outhdr, SMB2_HDR_PID);
557
558 if (flags & SMB2_HDR_FLAG_ASYNC) {
559 if (search_async_id == async_id) {
560 break;
561 }
562 } else {
563 if (search_message_id == message_id) {
564 break;
565 }
566 }
567 }
568
569 if (cur && cur->subreq) {
570 tevent_req_cancel(cur->subreq);
571 }
572
573 return NT_STATUS_OK;
574}
575
576static NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req)
577{
578 const uint8_t *inhdr;
579 int i = req->current_idx;
580 uint16_t opcode;
581 uint32_t flags;
582 NTSTATUS status;
583 NTSTATUS session_status;
584 uint32_t allowed_flags;
585
586 inhdr = (const uint8_t *)req->in.vector[i].iov_base;
587
588 /* TODO: verify more things */
589
590 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
591 opcode = IVAL(inhdr, SMB2_HDR_OPCODE);
592 DEBUG(10,("smbd_smb2_request_dispatch: opcode[%u]\n", opcode));
593
594 allowed_flags = SMB2_HDR_FLAG_CHAINED |
595 SMB2_HDR_FLAG_SIGNED |
596 SMB2_HDR_FLAG_DFS;
597 if (opcode == SMB2_OP_CANCEL) {
598 allowed_flags |= SMB2_HDR_FLAG_ASYNC;
599 }
600 if ((flags & ~allowed_flags) != 0) {
601 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
602 }
603
604 session_status = smbd_smb2_request_check_session(req);
605
606 req->do_signing = false;
607 if (flags & SMB2_HDR_FLAG_SIGNED) {
608 if (!NT_STATUS_IS_OK(session_status)) {
609 return smbd_smb2_request_error(req, session_status);
610 }
611
612 req->do_signing = true;
613 status = smb2_signing_check_pdu(req->session->session_key,
614 &req->in.vector[i], 3);
615 if (!NT_STATUS_IS_OK(status)) {
616 return smbd_smb2_request_error(req, status);
617 }
618 } else if (req->session && req->session->do_signing) {
619 return smbd_smb2_request_error(req, NT_STATUS_ACCESS_DENIED);
620 }
621
622 if (flags & SMB2_HDR_FLAG_CHAINED) {
623 /*
624 * This check is mostly for giving the correct error code
625 * for compounded requests.
626 *
627 * TODO: we may need to move this after the session
628 * and tcon checks.
629 */
630 if (!NT_STATUS_IS_OK(req->next_status)) {
631 return smbd_smb2_request_error(req, req->next_status);
632 }
633 } else {
634 req->compat_chain_fsp = NULL;
635 }
636
637 switch (opcode) {
638 case SMB2_OP_NEGPROT:
639 return smbd_smb2_request_process_negprot(req);
640
641 case SMB2_OP_SESSSETUP:
642 return smbd_smb2_request_process_sesssetup(req);
643
644 case SMB2_OP_LOGOFF:
645 if (!NT_STATUS_IS_OK(session_status)) {
646 return smbd_smb2_request_error(req, session_status);
647 }
648 return smbd_smb2_request_process_logoff(req);
649
650 case SMB2_OP_TCON:
651 if (!NT_STATUS_IS_OK(session_status)) {
652 return smbd_smb2_request_error(req, session_status);
653 }
654 status = smbd_smb2_request_check_session(req);
655 if (!NT_STATUS_IS_OK(status)) {
656 return smbd_smb2_request_error(req, status);
657 }
658 return smbd_smb2_request_process_tcon(req);
659
660 case SMB2_OP_TDIS:
661 if (!NT_STATUS_IS_OK(session_status)) {
662 return smbd_smb2_request_error(req, session_status);
663 }
664 status = smbd_smb2_request_check_tcon(req);
665 if (!NT_STATUS_IS_OK(status)) {
666 return smbd_smb2_request_error(req, status);
667 }
668 return smbd_smb2_request_process_tdis(req);
669
670 case SMB2_OP_CREATE:
671 if (!NT_STATUS_IS_OK(session_status)) {
672 return smbd_smb2_request_error(req, session_status);
673 }
674 status = smbd_smb2_request_check_tcon(req);
675 if (!NT_STATUS_IS_OK(status)) {
676 return smbd_smb2_request_error(req, status);
677 }
678 return smbd_smb2_request_process_create(req);
679
680 case SMB2_OP_CLOSE:
681 if (!NT_STATUS_IS_OK(session_status)) {
682 return smbd_smb2_request_error(req, session_status);
683 }
684 status = smbd_smb2_request_check_tcon(req);
685 if (!NT_STATUS_IS_OK(status)) {
686 return smbd_smb2_request_error(req, status);
687 }
688 return smbd_smb2_request_process_close(req);
689
690 case SMB2_OP_FLUSH:
691 if (!NT_STATUS_IS_OK(session_status)) {
692 return smbd_smb2_request_error(req, session_status);
693 }
694 status = smbd_smb2_request_check_tcon(req);
695 if (!NT_STATUS_IS_OK(status)) {
696 return smbd_smb2_request_error(req, status);
697 }
698 return smbd_smb2_request_process_flush(req);
699
700 case SMB2_OP_READ:
701 if (!NT_STATUS_IS_OK(session_status)) {
702 return smbd_smb2_request_error(req, session_status);
703 }
704 status = smbd_smb2_request_check_tcon(req);
705 if (!NT_STATUS_IS_OK(status)) {
706 return smbd_smb2_request_error(req, status);
707 }
708 return smbd_smb2_request_process_read(req);
709
710 case SMB2_OP_WRITE:
711 if (!NT_STATUS_IS_OK(session_status)) {
712 return smbd_smb2_request_error(req, session_status);
713 }
714 status = smbd_smb2_request_check_tcon(req);
715 if (!NT_STATUS_IS_OK(status)) {
716 return smbd_smb2_request_error(req, status);
717 }
718 return smbd_smb2_request_process_write(req);
719
720 case SMB2_OP_LOCK:
721 if (!NT_STATUS_IS_OK(session_status)) {
722 return smbd_smb2_request_error(req, session_status);
723 }
724 status = smbd_smb2_request_check_tcon(req);
725 if (!NT_STATUS_IS_OK(status)) {
726 return smbd_smb2_request_error(req, status);
727 }
728 return smbd_smb2_request_process_lock(req);
729
730 case SMB2_OP_IOCTL:
731 if (!NT_STATUS_IS_OK(session_status)) {
732 return smbd_smb2_request_error(req, session_status);
733 }
734 status = smbd_smb2_request_check_tcon(req);
735 if (!NT_STATUS_IS_OK(status)) {
736 return smbd_smb2_request_error(req, status);
737 }
738 return smbd_smb2_request_process_ioctl(req);
739
740 case SMB2_OP_CANCEL:
741 return smbd_smb2_request_process_cancel(req);
742
743 case SMB2_OP_KEEPALIVE:
744 return smbd_smb2_request_process_keepalive(req);
745
746 case SMB2_OP_FIND:
747 if (!NT_STATUS_IS_OK(session_status)) {
748 return smbd_smb2_request_error(req, session_status);
749 }
750 status = smbd_smb2_request_check_tcon(req);
751 if (!NT_STATUS_IS_OK(status)) {
752 return smbd_smb2_request_error(req, status);
753 }
754 return smbd_smb2_request_process_find(req);
755
756 case SMB2_OP_NOTIFY:
757 if (!NT_STATUS_IS_OK(session_status)) {
758 return smbd_smb2_request_error(req, session_status);
759 }
760 status = smbd_smb2_request_check_tcon(req);
761 if (!NT_STATUS_IS_OK(status)) {
762 return smbd_smb2_request_error(req, status);
763 }
764 return smbd_smb2_request_process_notify(req);
765
766 case SMB2_OP_GETINFO:
767 if (!NT_STATUS_IS_OK(session_status)) {
768 return smbd_smb2_request_error(req, session_status);
769 }
770 status = smbd_smb2_request_check_tcon(req);
771 if (!NT_STATUS_IS_OK(status)) {
772 return smbd_smb2_request_error(req, status);
773 }
774 return smbd_smb2_request_process_getinfo(req);
775
776 case SMB2_OP_SETINFO:
777 if (!NT_STATUS_IS_OK(session_status)) {
778 return smbd_smb2_request_error(req, session_status);
779 }
780 status = smbd_smb2_request_check_tcon(req);
781 if (!NT_STATUS_IS_OK(status)) {
782 return smbd_smb2_request_error(req, status);
783 }
784 return smbd_smb2_request_process_setinfo(req);
785
786 case SMB2_OP_BREAK:
787 if (!NT_STATUS_IS_OK(session_status)) {
788 return smbd_smb2_request_error(req, session_status);
789 }
790 status = smbd_smb2_request_check_tcon(req);
791 if (!NT_STATUS_IS_OK(status)) {
792 return smbd_smb2_request_error(req, status);
793 }
794 return smbd_smb2_request_process_break(req);
795 }
796
797 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
798}
799
800static void smbd_smb2_request_dispatch_compound(struct tevent_req *subreq);
801static void smbd_smb2_request_writev_done(struct tevent_req *subreq);
802
803static NTSTATUS smbd_smb2_request_reply(struct smbd_smb2_request *req)
804{
805 struct tevent_req *subreq;
806
807 req->subreq = NULL;
808
809 smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
810
811 if (req->do_signing) {
812 int i = req->current_idx;
813 NTSTATUS status;
814 status = smb2_signing_sign_pdu(req->session->session_key,
815 &req->out.vector[i], 3);
816 if (!NT_STATUS_IS_OK(status)) {
817 return status;
818 }
819 }
820
821 req->current_idx += 3;
822
823 if (req->current_idx < req->out.vector_count) {
824 struct timeval zero = timeval_zero();
825 subreq = tevent_wakeup_send(req,
826 req->sconn->smb2.event_ctx,
827 zero);
828 if (subreq == NULL) {
829 return NT_STATUS_NO_MEMORY;
830 }
831 tevent_req_set_callback(subreq,
832 smbd_smb2_request_dispatch_compound,
833 req);
834
835 return NT_STATUS_OK;
836 }
837
838 subreq = tstream_writev_queue_send(req,
839 req->sconn->smb2.event_ctx,
840 req->sconn->smb2.stream,
841 req->sconn->smb2.send_queue,
842 req->out.vector,
843 req->out.vector_count);
844 if (subreq == NULL) {
845 return NT_STATUS_NO_MEMORY;
846 }
847 tevent_req_set_callback(subreq, smbd_smb2_request_writev_done, req);
848
849 return NT_STATUS_OK;
850}
851
852static void smbd_smb2_request_dispatch_compound(struct tevent_req *subreq)
853{
854 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
855 struct smbd_smb2_request);
856 struct smbd_server_connection *sconn = req->sconn;
857 NTSTATUS status;
858
859 tevent_wakeup_recv(subreq);
860 TALLOC_FREE(subreq);
861
862 DEBUG(10,("smbd_smb2_request_dispatch_compound: idx[%d] of %d vectors\n",
863 req->current_idx, req->in.vector_count));
864
865 status = smbd_smb2_request_dispatch(req);
866 if (!NT_STATUS_IS_OK(status)) {
867 smbd_server_connection_terminate(sconn, nt_errstr(status));
868 return;
869 }
870}
871
872static void smbd_smb2_request_writev_done(struct tevent_req *subreq)
873{
874 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
875 struct smbd_smb2_request);
876 struct smbd_server_connection *sconn = req->sconn;
877 int ret;
878 int sys_errno;
879
880 ret = tstream_writev_queue_recv(subreq, &sys_errno);
881 TALLOC_FREE(subreq);
882 TALLOC_FREE(req);
883 if (ret == -1) {
884 NTSTATUS status = map_nt_error_from_unix(sys_errno);
885 smbd_server_connection_terminate(sconn, nt_errstr(status));
886 return;
887 }
888}
889
890NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
891 NTSTATUS status,
892 DATA_BLOB *info,
893 const char *location)
894{
895 uint8_t *outhdr;
896 uint8_t *outbody;
897 int i = req->current_idx;
898
899 DEBUG(10,("smbd_smb2_request_error_ex: idx[%d] status[%s] |%s| at %s\n",
900 i, nt_errstr(status), info ? " +info" : "",
901 location));
902
903 outhdr = (uint8_t *)req->out.vector[i].iov_base;
904
905 SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
906
907 outbody = outhdr + SMB2_HDR_BODY;
908
909 req->out.vector[i+1].iov_base = (void *)outbody;
910 req->out.vector[i+1].iov_len = 8;
911
912 if (info) {
913 SIVAL(outbody, 0x04, info->length);
914 req->out.vector[i+2].iov_base = (void *)info->data;
915 req->out.vector[i+2].iov_len = info->length;
916 } else {
917 req->out.vector[i+2].iov_base = NULL;
918 req->out.vector[i+2].iov_len = 0;
919 }
920
921 /*
922 * if a request fails, all other remaining
923 * compounded requests should fail too
924 */
925 req->next_status = NT_STATUS_INVALID_PARAMETER;
926
927 return smbd_smb2_request_reply(req);
928}
929
930NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
931 NTSTATUS status,
932 DATA_BLOB body, DATA_BLOB *dyn,
933 const char *location)
934{
935 uint8_t *outhdr;
936 uint8_t *outdyn;
937 int i = req->current_idx;
938 uint32_t next_command_ofs;
939
940 DEBUG(10,("smbd_smb2_request_done_ex: "
941 "idx[%d] status[%s] body[%u] dyn[%s:%u] at %s\n",
942 i, nt_errstr(status), (unsigned int)body.length,
943 dyn ? "yes": "no",
944 (unsigned int)(dyn ? dyn->length : 0),
945 location));
946
947 if (body.length < 2) {
948 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
949 }
950
951 if ((body.length % 2) != 0) {
952 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
953 }
954
955 outhdr = (uint8_t *)req->out.vector[i].iov_base;
956 /* the fallback dynamic buffer */
957 outdyn = outhdr + SMB2_HDR_BODY + 8;
958
959 next_command_ofs = IVAL(outhdr, SMB2_HDR_NEXT_COMMAND);
960 SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
961
962 req->out.vector[i+1].iov_base = (void *)body.data;
963 req->out.vector[i+1].iov_len = body.length;
964
965 if (dyn) {
966 req->out.vector[i+2].iov_base = (void *)dyn->data;
967 req->out.vector[i+2].iov_len = dyn->length;
968 } else {
969 req->out.vector[i+2].iov_base = NULL;
970 req->out.vector[i+2].iov_len = 0;
971 }
972
973 /* see if we need to recalculate the offset to the next response */
974 if (next_command_ofs > 0) {
975 next_command_ofs = SMB2_HDR_BODY;
976 next_command_ofs += req->out.vector[i+1].iov_len;
977 next_command_ofs += req->out.vector[i+2].iov_len;
978 }
979
980 if ((next_command_ofs % 8) != 0) {
981 size_t pad_size = 8 - (next_command_ofs % 8);
982 if (req->out.vector[i+2].iov_len == 0) {
983 /*
984 * if the dyn buffer is empty
985 * we can use it to add padding
986 */
987 uint8_t *pad;
988
989 pad = talloc_zero_array(req->out.vector,
990 uint8_t, pad_size);
991 if (pad == NULL) {
992 return smbd_smb2_request_error(req,
993 NT_STATUS_NO_MEMORY);
994 }
995
996 req->out.vector[i+2].iov_base = (void *)pad;
997 req->out.vector[i+2].iov_len = pad_size;
998 } else {
999 /*
1000 * For now we copy the dynamic buffer
1001 * and add the padding to the new buffer
1002 */
1003 size_t old_size;
1004 uint8_t *old_dyn;
1005 size_t new_size;
1006 uint8_t *new_dyn;
1007
1008 old_size = req->out.vector[i+2].iov_len;
1009 old_dyn = (uint8_t *)req->out.vector[i+2].iov_base;
1010
1011 new_size = old_size + pad_size;
1012 new_dyn = talloc_array(req->out.vector,
1013 uint8_t, new_size);
1014 if (new_dyn == NULL) {
1015 return smbd_smb2_request_error(req,
1016 NT_STATUS_NO_MEMORY);
1017 }
1018
1019 memcpy(new_dyn, old_dyn, old_size);
1020 memset(new_dyn + old_size, 0, pad_size);
1021
1022 req->out.vector[i+2].iov_base = (void *)new_dyn;
1023 req->out.vector[i+2].iov_len = new_size;
1024
1025 TALLOC_FREE(old_dyn);
1026 }
1027 next_command_ofs += pad_size;
1028 }
1029
1030 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
1031
1032 return smbd_smb2_request_reply(req);
1033}
1034
1035struct smbd_smb2_send_oplock_break_state {
1036 struct smbd_server_connection *sconn;
1037 uint8_t buf[4 + SMB2_HDR_BODY + 0x18];
1038 struct iovec vector;
1039};
1040
1041static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq);
1042
1043NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
1044 uint64_t file_id_persistent,
1045 uint64_t file_id_volatile,
1046 uint8_t oplock_level)
1047{
1048 struct smbd_smb2_send_oplock_break_state *state;
1049 struct tevent_req *subreq;
1050 uint8_t *hdr;
1051 uint8_t *body;
1052
1053 state = talloc(sconn, struct smbd_smb2_send_oplock_break_state);
1054 if (state == NULL) {
1055 return NT_STATUS_NO_MEMORY;
1056 }
1057 state->sconn = sconn;
1058
1059 state->vector.iov_base = (void *)state->buf;
1060 state->vector.iov_len = sizeof(state->buf);
1061
1062 _smb2_setlen(state->buf, sizeof(state->buf) - 4);
1063 hdr = state->buf + 4;
1064 body = hdr + SMB2_HDR_BODY;
1065
1066 SIVAL(hdr, 0, SMB2_MAGIC);
1067 SSVAL(hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
1068 SSVAL(hdr, SMB2_HDR_EPOCH, 0);
1069 SIVAL(hdr, SMB2_HDR_STATUS, 0);
1070 SSVAL(hdr, SMB2_HDR_OPCODE, SMB2_OP_BREAK);
1071 SSVAL(hdr, SMB2_HDR_CREDIT, 0);
1072 SIVAL(hdr, SMB2_HDR_FLAGS, SMB2_HDR_FLAG_REDIRECT);
1073 SIVAL(hdr, SMB2_HDR_NEXT_COMMAND, 0);
1074 SBVAL(hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
1075 SIVAL(hdr, SMB2_HDR_PID, 0);
1076 SIVAL(hdr, SMB2_HDR_TID, 0);
1077 SBVAL(hdr, SMB2_HDR_SESSION_ID, 0);
1078 memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
1079
1080 SSVAL(body, 0x00, 0x18);
1081
1082 SCVAL(body, 0x02, oplock_level);
1083 SCVAL(body, 0x03, 0); /* reserved */
1084 SIVAL(body, 0x04, 0); /* reserved */
1085 SBVAL(body, 0x08, file_id_persistent);
1086 SBVAL(body, 0x10, file_id_volatile);
1087
1088 subreq = tstream_writev_queue_send(state,
1089 sconn->smb2.event_ctx,
1090 sconn->smb2.stream,
1091 sconn->smb2.send_queue,
1092 &state->vector, 1);
1093 if (subreq == NULL) {
1094 return NT_STATUS_NO_MEMORY;
1095 }
1096 tevent_req_set_callback(subreq,
1097 smbd_smb2_oplock_break_writev_done,
1098 state);
1099
1100 return NT_STATUS_OK;
1101}
1102
1103static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq)
1104{
1105 struct smbd_smb2_send_oplock_break_state *state =
1106 tevent_req_callback_data(subreq,
1107 struct smbd_smb2_send_oplock_break_state);
1108 struct smbd_server_connection *sconn = state->sconn;
1109 int ret;
1110 int sys_errno;
1111
1112 ret = tstream_writev_queue_recv(subreq, &sys_errno);
1113 TALLOC_FREE(subreq);
1114 if (ret == -1) {
1115 NTSTATUS status = map_nt_error_from_unix(sys_errno);
1116 smbd_server_connection_terminate(sconn, nt_errstr(status));
1117 return;
1118 }
1119
1120 TALLOC_FREE(state);
1121}
1122
1123struct smbd_smb2_request_read_state {
1124 size_t missing;
1125 bool asked_for_header;
1126 struct smbd_smb2_request *smb2_req;
1127};
1128
1129static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1130 void *private_data,
1131 TALLOC_CTX *mem_ctx,
1132 struct iovec **_vector,
1133 size_t *_count);
1134static void smbd_smb2_request_read_done(struct tevent_req *subreq);
1135
1136static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx,
1137 struct tevent_context *ev,
1138 struct smbd_server_connection *sconn)
1139{
1140 struct tevent_req *req;
1141 struct smbd_smb2_request_read_state *state;
1142 struct tevent_req *subreq;
1143
1144 req = tevent_req_create(mem_ctx, &state,
1145 struct smbd_smb2_request_read_state);
1146 if (req == NULL) {
1147 return NULL;
1148 }
1149 state->missing = 0;
1150 state->asked_for_header = false;
1151
1152 state->smb2_req = smbd_smb2_request_allocate(state);
1153 if (tevent_req_nomem(state->smb2_req, req)) {
1154 return tevent_req_post(req, ev);
1155 }
1156 state->smb2_req->sconn = sconn;
1157
1158 subreq = tstream_readv_pdu_queue_send(state, ev, sconn->smb2.stream,
1159 sconn->smb2.recv_queue,
1160 smbd_smb2_request_next_vector,
1161 state);
1162 if (tevent_req_nomem(subreq, req)) {
1163 return tevent_req_post(req, ev);
1164 }
1165 tevent_req_set_callback(subreq, smbd_smb2_request_read_done, req);
1166
1167 return req;
1168}
1169
1170static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1171 void *private_data,
1172 TALLOC_CTX *mem_ctx,
1173 struct iovec **_vector,
1174 size_t *_count)
1175{
1176 struct smbd_smb2_request_read_state *state =
1177 talloc_get_type_abort(private_data,
1178 struct smbd_smb2_request_read_state);
1179 struct smbd_smb2_request *req = state->smb2_req;
1180 struct iovec *vector;
1181 int idx = req->in.vector_count;
1182 size_t len = 0;
1183 uint8_t *buf = NULL;
1184
1185 if (req->in.vector_count == 0) {
1186 /*
1187 * first we need to get the NBT header
1188 */
1189 req->in.vector = talloc_array(req, struct iovec,
1190 req->in.vector_count + 1);
1191 if (req->in.vector == NULL) {
1192 return -1;
1193 }
1194 req->in.vector_count += 1;
1195
1196 req->in.vector[idx].iov_base = (void *)req->in.nbt_hdr;
1197 req->in.vector[idx].iov_len = 4;
1198
1199 vector = talloc_array(mem_ctx, struct iovec, 1);
1200 if (vector == NULL) {
1201 return -1;
1202 }
1203
1204 vector[0] = req->in.vector[idx];
1205
1206 *_vector = vector;
1207 *_count = 1;
1208 return 0;
1209 }
1210
1211 if (req->in.vector_count == 1) {
1212 /*
1213 * Now we analyze the NBT header
1214 */
1215 state->missing = smb2_len(req->in.vector[0].iov_base);
1216
1217 if (state->missing == 0) {
1218 /* if there're no remaining bytes, we're done */
1219 *_vector = NULL;
1220 *_count = 0;
1221 return 0;
1222 }
1223
1224 req->in.vector = talloc_realloc(req, req->in.vector,
1225 struct iovec,
1226 req->in.vector_count + 1);
1227 if (req->in.vector == NULL) {
1228 return -1;
1229 }
1230 req->in.vector_count += 1;
1231
1232 if (CVAL(req->in.vector[0].iov_base, 0) != 0) {
1233 /*
1234 * it's a special NBT message,
1235 * so get all remaining bytes
1236 */
1237 len = state->missing;
1238 } else if (state->missing < (SMB2_HDR_BODY + 2)) {
1239 /*
1240 * it's an invalid message, just read what we can get
1241 * and let the caller handle the error
1242 */
1243 len = state->missing;
1244 } else {
1245 /*
1246 * We assume it's a SMB2 request,
1247 * and we first get the header and the
1248 * first 2 bytes (the struct size) of the body
1249 */
1250 len = SMB2_HDR_BODY + 2;
1251
1252 state->asked_for_header = true;
1253 }
1254
1255 state->missing -= len;
1256
1257 buf = talloc_array(req->in.vector, uint8_t, len);
1258 if (buf == NULL) {
1259 return -1;
1260 }
1261
1262 req->in.vector[idx].iov_base = (void *)buf;
1263 req->in.vector[idx].iov_len = len;
1264
1265 vector = talloc_array(mem_ctx, struct iovec, 1);
1266 if (vector == NULL) {
1267 return -1;
1268 }
1269
1270 vector[0] = req->in.vector[idx];
1271
1272 *_vector = vector;
1273 *_count = 1;
1274 return 0;
1275 }
1276
1277 if (state->missing == 0) {
1278 /* if there're no remaining bytes, we're done */
1279 *_vector = NULL;
1280 *_count = 0;
1281 return 0;
1282 }
1283
1284 if (state->asked_for_header) {
1285 const uint8_t *hdr;
1286 size_t full_size;
1287 size_t next_command_ofs;
1288 size_t body_size;
1289 uint8_t *body;
1290 size_t dyn_size;
1291 uint8_t *dyn;
1292 bool invalid = false;
1293
1294 state->asked_for_header = false;
1295
1296 /*
1297 * We got the SMB2 header and the first 2 bytes
1298 * of the body. We fix the size to just the header
1299 * and manually copy the 2 first bytes to the body section
1300 */
1301 req->in.vector[idx-1].iov_len = SMB2_HDR_BODY;
1302 hdr = (const uint8_t *)req->in.vector[idx-1].iov_base;
1303
1304 /* allocate vectors for body and dynamic areas */
1305 req->in.vector = talloc_realloc(req, req->in.vector,
1306 struct iovec,
1307 req->in.vector_count + 2);
1308 if (req->in.vector == NULL) {
1309 return -1;
1310 }
1311 req->in.vector_count += 2;
1312
1313 full_size = state->missing + SMB2_HDR_BODY + 2;
1314 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
1315 body_size = SVAL(hdr, SMB2_HDR_BODY);
1316
1317 if (next_command_ofs != 0) {
1318 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
1319 /*
1320 * this is invalid, just return a zero
1321 * body and let the caller deal with the error
1322 */
1323 invalid = true;
1324 } else if (next_command_ofs > full_size) {
1325 /*
1326 * this is invalid, just return a zero
1327 * body and let the caller deal with the error
1328 */
1329 invalid = true;
1330 } else {
1331 full_size = next_command_ofs;
1332 }
1333 }
1334
1335 if (!invalid) {
1336 if (body_size < 2) {
1337 /*
1338 * this is invalid, just return a zero
1339 * body and let the caller deal with the error
1340 */
1341 invalid = true;
1342 }
1343
1344 if ((body_size % 2) != 0) {
1345 body_size -= 1;
1346 }
1347
1348 if (body_size > (full_size - SMB2_HDR_BODY)) {
1349 /*
1350 * this is invalid, just return a zero
1351 * body and let the caller deal with the error
1352 */
1353 invalid = true;
1354 }
1355 }
1356
1357 if (invalid) {
1358 /* the caller should check this */
1359 body_size = 2;
1360 }
1361
1362 dyn_size = full_size - (SMB2_HDR_BODY + body_size);
1363
1364 state->missing -= (body_size - 2) + dyn_size;
1365
1366 body = talloc_array(req->in.vector, uint8_t, body_size);
1367 if (body == NULL) {
1368 return -1;
1369 }
1370
1371 dyn = talloc_array(req->in.vector, uint8_t, dyn_size);
1372 if (dyn == NULL) {
1373 return -1;
1374 }
1375
1376 req->in.vector[idx].iov_base = (void *)body;
1377 req->in.vector[idx].iov_len = body_size;
1378 req->in.vector[idx+1].iov_base = (void *)dyn;
1379 req->in.vector[idx+1].iov_len = dyn_size;
1380
1381 vector = talloc_array(mem_ctx, struct iovec, 2);
1382 if (vector == NULL) {
1383 return -1;
1384 }
1385
1386 /*
1387 * the first 2 bytes of the body were already fetched
1388 * together with the header
1389 */
1390 memcpy(body, hdr + SMB2_HDR_BODY, 2);
1391 vector[0].iov_base = body + 2;
1392 vector[0].iov_len = body_size - 2;
1393
1394 vector[1] = req->in.vector[idx+1];
1395
1396 *_vector = vector;
1397 *_count = 2;
1398 return 0;
1399 }
1400
1401 /*
1402 * when we endup here, we're looking for a new SMB2 request
1403 * next. And we ask for its header and the first 2 bytes of
1404 * the body (like we did for the first SMB2 request).
1405 */
1406
1407 req->in.vector = talloc_realloc(req, req->in.vector,
1408 struct iovec,
1409 req->in.vector_count + 1);
1410 if (req->in.vector == NULL) {
1411 return -1;
1412 }
1413 req->in.vector_count += 1;
1414
1415 /*
1416 * We assume it's a SMB2 request,
1417 * and we first get the header and the
1418 * first 2 bytes (the struct size) of the body
1419 */
1420 len = SMB2_HDR_BODY + 2;
1421
1422 if (len > state->missing) {
1423 /* let the caller handle the error */
1424 len = state->missing;
1425 }
1426
1427 state->missing -= len;
1428 state->asked_for_header = true;
1429
1430 buf = talloc_array(req->in.vector, uint8_t, len);
1431 if (buf == NULL) {
1432 return -1;
1433 }
1434
1435 req->in.vector[idx].iov_base = (void *)buf;
1436 req->in.vector[idx].iov_len = len;
1437
1438 vector = talloc_array(mem_ctx, struct iovec, 1);
1439 if (vector == NULL) {
1440 return -1;
1441 }
1442
1443 vector[0] = req->in.vector[idx];
1444
1445 *_vector = vector;
1446 *_count = 1;
1447 return 0;
1448}
1449
1450static void smbd_smb2_request_read_done(struct tevent_req *subreq)
1451{
1452 struct tevent_req *req =
1453 tevent_req_callback_data(subreq,
1454 struct tevent_req);
1455 int ret;
1456 int sys_errno;
1457 NTSTATUS status;
1458
1459 ret = tstream_readv_pdu_queue_recv(subreq, &sys_errno);
1460 if (ret == -1) {
1461 status = map_nt_error_from_unix(sys_errno);
1462 tevent_req_nterror(req, status);
1463 return;
1464 }
1465
1466 tevent_req_done(req);
1467}
1468
1469static NTSTATUS smbd_smb2_request_read_recv(struct tevent_req *req,
1470 TALLOC_CTX *mem_ctx,
1471 struct smbd_smb2_request **_smb2_req)
1472{
1473 struct smbd_smb2_request_read_state *state =
1474 tevent_req_data(req,
1475 struct smbd_smb2_request_read_state);
1476 NTSTATUS status;
1477
1478 if (tevent_req_is_nterror(req, &status)) {
1479 tevent_req_received(req);
1480 return status;
1481 }
1482
1483 talloc_steal(mem_ctx, state->smb2_req->mem_pool);
1484 *_smb2_req = state->smb2_req;
1485 tevent_req_received(req);
1486 return NT_STATUS_OK;
1487}
1488
1489static void smbd_smb2_request_incoming(struct tevent_req *subreq);
1490
1491void smbd_smb2_first_negprot(struct smbd_server_connection *sconn,
1492 const uint8_t *inbuf, size_t size)
1493{
1494 NTSTATUS status;
1495 struct smbd_smb2_request *req;
1496 struct tevent_req *subreq;
1497
1498 DEBUG(10,("smbd_smb2_first_negprot: packet length %u\n",
1499 (unsigned int)size));
1500
1501 status = smbd_initialize_smb2(sconn);
1502 if (!NT_STATUS_IS_OK(status)) {
1503 smbd_server_connection_terminate(sconn, nt_errstr(status));
1504 return;
1505 }
1506
1507 status = smbd_smb2_request_create(sconn, inbuf, size, &req);
1508 if (!NT_STATUS_IS_OK(status)) {
1509 smbd_server_connection_terminate(sconn, nt_errstr(status));
1510 return;
1511 }
1512
1513 status = smbd_smb2_request_setup_out(req);
1514 if (!NT_STATUS_IS_OK(status)) {
1515 smbd_server_connection_terminate(sconn, nt_errstr(status));
1516 return;
1517 }
1518
1519 status = smbd_smb2_request_dispatch(req);
1520 if (!NT_STATUS_IS_OK(status)) {
1521 smbd_server_connection_terminate(sconn, nt_errstr(status));
1522 return;
1523 }
1524
1525 /* ask for the next request */
1526 subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
1527 if (subreq == NULL) {
1528 smbd_server_connection_terminate(sconn, "no memory for reading");
1529 return;
1530 }
1531 tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
1532}
1533
1534static void smbd_smb2_request_incoming(struct tevent_req *subreq)
1535{
1536 struct smbd_server_connection *sconn = tevent_req_callback_data(subreq,
1537 struct smbd_server_connection);
1538 NTSTATUS status;
1539 struct smbd_smb2_request *req = NULL;
1540
1541 status = smbd_smb2_request_read_recv(subreq, sconn, &req);
1542 TALLOC_FREE(subreq);
1543 if (!NT_STATUS_IS_OK(status)) {
1544 smbd_server_connection_terminate(sconn, nt_errstr(status));
1545 return;
1546 }
1547
1548 if (req->in.nbt_hdr[0] != 0x00) {
1549 DEBUG(1,("smbd_smb2_request_incoming: ignore NBT[0x%02X] msg\n",
1550 req->in.nbt_hdr[0]));
1551 TALLOC_FREE(req);
1552 goto next;
1553 }
1554
1555 req->current_idx = 1;
1556
1557 DEBUG(10,("smbd_smb2_request_incoming: idx[%d] of %d vectors\n",
1558 req->current_idx, req->in.vector_count));
1559
1560 status = smbd_smb2_request_validate(req);
1561 if (!NT_STATUS_IS_OK(status)) {
1562 smbd_server_connection_terminate(sconn, nt_errstr(status));
1563 return;
1564 }
1565
1566 status = smbd_smb2_request_setup_out(req);
1567 if (!NT_STATUS_IS_OK(status)) {
1568 smbd_server_connection_terminate(sconn, nt_errstr(status));
1569 return;
1570 }
1571
1572 status = smbd_smb2_request_dispatch(req);
1573 if (!NT_STATUS_IS_OK(status)) {
1574 smbd_server_connection_terminate(sconn, nt_errstr(status));
1575 return;
1576 }
1577
1578next:
1579 /* ask for the next request (this constructs the main loop) */
1580 subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
1581 if (subreq == NULL) {
1582 smbd_server_connection_terminate(sconn, "no memory for reading");
1583 return;
1584 }
1585 tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
1586}
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