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s3-winreg: Fix _winreg_QueryValue crash bugs and implement windows behavior.
[Samba/kamenim.git] / source3 / smbd / smb2_server.c
blob1d95d4be3fc656bfe36cb14c799f3d17d38e56ed
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
26 bool 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
39 static 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
86 static 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
98 static 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
108 static 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
122 static 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
154 static 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
237 static NTSTATUS smbd_smb2_request_validate(struct smbd_smb2_request *req,
238 uint16_t *p_creds_requested)
239 {
240 int count;
241 int idx;
242 bool compound_related = false;
243
244 count = req->in.vector_count;
245
246 if (count < 4) {
247 /* It's not a SMB2 request */
248 return NT_STATUS_INVALID_PARAMETER;
249 }
250
251 for (idx=1; idx < count; idx += 3) {
252 const uint8_t *inhdr = NULL;
253 uint32_t flags;
254
255 if (req->in.vector[idx].iov_len != SMB2_HDR_BODY) {
256 return NT_STATUS_INVALID_PARAMETER;
257 }
258
259 if (req->in.vector[idx+1].iov_len < 2) {
260 return NT_STATUS_INVALID_PARAMETER;
261 }
262
263 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
264
265 /* setup the SMB2 header */
266 if (IVAL(inhdr, SMB2_HDR_PROTOCOL_ID) != SMB2_MAGIC) {
267 return NT_STATUS_INVALID_PARAMETER;
268 }
269
270 *p_creds_requested = SVAL(inhdr, SMB2_HDR_CREDIT);
271
272 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
273 if (idx == 1) {
274 /*
275 * the 1st request should never have the
276 * SMB2_HDR_FLAG_CHAINED flag set
277 */
278 if (flags & SMB2_HDR_FLAG_CHAINED) {
279 req->next_status = NT_STATUS_INVALID_PARAMETER;
280 return NT_STATUS_OK;
281 }
282 } else if (idx == 4) {
283 /*
284 * the 2nd request triggers related vs. unrelated
285 * compounded requests
286 */
287 if (flags & SMB2_HDR_FLAG_CHAINED) {
288 compound_related = true;
289 }
290 } else if (idx > 4) {
291 #if 0
292 /*
293 * It seems the this tests are wrong
294 * see the SMB2-COMPOUND test
295 */
296
297 /*
298 * all other requests should match the 2nd one
299 */
300 if (flags & SMB2_HDR_FLAG_CHAINED) {
301 if (!compound_related) {
302 req->next_status =
303 NT_STATUS_INVALID_PARAMETER;
304 return NT_STATUS_OK;
305 }
306 } else {
307 if (compound_related) {
308 req->next_status =
309 NT_STATUS_INVALID_PARAMETER;
310 return NT_STATUS_OK;
311 }
312 }
313 #endif
314 }
315 }
316
317 return NT_STATUS_OK;
318 }
319
320 static NTSTATUS smbd_smb2_request_setup_out(struct smbd_smb2_request *req, uint16_t creds)
321 {
322 struct iovec *vector;
323 int count;
324 int idx;
325
326 count = req->in.vector_count;
327 vector = talloc_array(req, struct iovec, count);
328 if (vector == NULL) {
329 return NT_STATUS_NO_MEMORY;
330 }
331
332 vector[0].iov_base = req->out.nbt_hdr;
333 vector[0].iov_len = 4;
334 SIVAL(req->out.nbt_hdr, 0, 0);
335
336 for (idx=1; idx < count; idx += 3) {
337 const uint8_t *inhdr = NULL;
338 uint32_t in_flags;
339 uint8_t *outhdr = NULL;
340 uint8_t *outbody = NULL;
341 uint32_t next_command_ofs = 0;
342 struct iovec *current = &vector[idx];
343
344 if ((idx + 3) < count) {
345 /* we have a next command */
346 next_command_ofs = SMB2_HDR_BODY + 8;
347 }
348
349 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
350 in_flags = IVAL(inhdr, SMB2_HDR_FLAGS);
351
352 outhdr = talloc_array(vector, uint8_t,
353 SMB2_HDR_BODY + 8);
354 if (outhdr == NULL) {
355 return NT_STATUS_NO_MEMORY;
356 }
357
358 outbody = outhdr + SMB2_HDR_BODY;
359
360 current[0].iov_base = (void *)outhdr;
361 current[0].iov_len = SMB2_HDR_BODY;
362
363 current[1].iov_base = (void *)outbody;
364 current[1].iov_len = 8;
365
366 current[2].iov_base = NULL;
367 current[2].iov_len = 0;
368
369 /* setup the SMB2 header */
370 SIVAL(outhdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
371 SSVAL(outhdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
372 SSVAL(outhdr, SMB2_HDR_EPOCH, 0);
373 SIVAL(outhdr, SMB2_HDR_STATUS,
374 NT_STATUS_V(NT_STATUS_INTERNAL_ERROR));
375 SSVAL(outhdr, SMB2_HDR_OPCODE,
376 SVAL(inhdr, SMB2_HDR_OPCODE));
377 SSVAL(outhdr, SMB2_HDR_CREDIT, creds);
378 SIVAL(outhdr, SMB2_HDR_FLAGS,
379 IVAL(inhdr, SMB2_HDR_FLAGS) | SMB2_HDR_FLAG_REDIRECT);
380 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
381 SBVAL(outhdr, SMB2_HDR_MESSAGE_ID,
382 BVAL(inhdr, SMB2_HDR_MESSAGE_ID));
383 SIVAL(outhdr, SMB2_HDR_PID,
384 IVAL(inhdr, SMB2_HDR_PID));
385 SIVAL(outhdr, SMB2_HDR_TID,
386 IVAL(inhdr, SMB2_HDR_TID));
387 SBVAL(outhdr, SMB2_HDR_SESSION_ID,
388 BVAL(inhdr, SMB2_HDR_SESSION_ID));
389 memset(outhdr + SMB2_HDR_SIGNATURE, 0, 16);
390
391 /* setup error body header */
392 SSVAL(outbody, 0x00, 0x08 + 1);
393 SSVAL(outbody, 0x02, 0);
394 SIVAL(outbody, 0x04, 0);
395 }
396
397 req->out.vector = vector;
398 req->out.vector_count = count;
399
400 /* setup the length of the NBT packet */
401 smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
402
403 DLIST_ADD_END(req->sconn->smb2.requests, req, struct smbd_smb2_request *);
404
405 return NT_STATUS_OK;
406 }
407
408 void smbd_server_connection_terminate_ex(struct smbd_server_connection *sconn,
409 const char *reason,
410 const char *location)
411 {
412 DEBUG(10,("smbd_server_connection_terminate_ex: reason[%s] at %s\n",
413 reason, location));
414 exit_server_cleanly(reason);
415 }
416
417 struct smbd_smb2_request_pending_state {
418 struct smbd_server_connection *sconn;
419 uint8_t buf[4 + SMB2_HDR_BODY + 0x08];
420 struct iovec vector;
421 };
422
423 static void smbd_smb2_request_pending_writev_done(struct tevent_req *subreq);
424
425 NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req,
426 struct tevent_req *subreq)
427 {
428 struct smbd_smb2_request_pending_state *state;
429 uint8_t *outhdr;
430 int i = req->current_idx;
431 uint32_t flags;
432 uint64_t message_id;
433 uint64_t async_id;
434 uint8_t *hdr;
435 uint8_t *body;
436
437 if (!tevent_req_is_in_progress(subreq)) {
438 return NT_STATUS_OK;
439 }
440
441 req->subreq = subreq;
442 subreq = NULL;
443
444 outhdr = (uint8_t *)req->out.vector[i].iov_base;
445
446 flags = IVAL(outhdr, SMB2_HDR_FLAGS);
447 message_id = BVAL(outhdr, SMB2_HDR_MESSAGE_ID);
448
449 async_id = message_id; /* keep it simple for now... */
450 SIVAL(outhdr, SMB2_HDR_FLAGS, flags | SMB2_HDR_FLAG_ASYNC);
451 SBVAL(outhdr, SMB2_HDR_PID, async_id);
452
453 /* TODO: add a paramter to delay this */
454 state = talloc(req->sconn, struct smbd_smb2_request_pending_state);
455 if (state == NULL) {
456 return NT_STATUS_NO_MEMORY;
457 }
458 state->sconn = req->sconn;
459
460 state->vector.iov_base = (void *)state->buf;
461 state->vector.iov_len = sizeof(state->buf);
462
463 _smb2_setlen(state->buf, sizeof(state->buf) - 4);
464 hdr = state->buf + 4;
465 body = hdr + SMB2_HDR_BODY;
466
467 SIVAL(hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
468 SSVAL(hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
469 SSVAL(hdr, SMB2_HDR_EPOCH, 0);
470 SIVAL(hdr, SMB2_HDR_STATUS, NT_STATUS_V(STATUS_PENDING));
471 SSVAL(hdr, SMB2_HDR_OPCODE,
472 SVAL(outhdr, SMB2_HDR_OPCODE));
473 SSVAL(hdr, SMB2_HDR_CREDIT, 1);
474 SIVAL(hdr, SMB2_HDR_FLAGS,
475 IVAL(outhdr, SMB2_HDR_FLAGS));
476 SIVAL(hdr, SMB2_HDR_NEXT_COMMAND, 0);
477 SBVAL(hdr, SMB2_HDR_MESSAGE_ID,
478 BVAL(outhdr, SMB2_HDR_MESSAGE_ID));
479 SBVAL(hdr, SMB2_HDR_PID,
480 BVAL(outhdr, SMB2_HDR_PID));
481 SBVAL(hdr, SMB2_HDR_SESSION_ID,
482 BVAL(outhdr, SMB2_HDR_SESSION_ID));
483 memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
484
485 SSVAL(body, 0x00, 0x08 + 1);
486
487 SCVAL(body, 0x02, 0);
488 SCVAL(body, 0x03, 0);
489 SIVAL(body, 0x04, 0);
490
491 subreq = tstream_writev_queue_send(state,
492 req->sconn->smb2.event_ctx,
493 req->sconn->smb2.stream,
494 req->sconn->smb2.send_queue,
495 &state->vector, 1);
496 if (subreq == NULL) {
497 return NT_STATUS_NO_MEMORY;
498 }
499 tevent_req_set_callback(subreq,
500 smbd_smb2_request_pending_writev_done,
501 state);
502
503 return NT_STATUS_OK;
504 }
505
506 static void smbd_smb2_request_pending_writev_done(struct tevent_req *subreq)
507 {
508 struct smbd_smb2_request_pending_state *state =
509 tevent_req_callback_data(subreq,
510 struct smbd_smb2_request_pending_state);
511 struct smbd_server_connection *sconn = state->sconn;
512 int ret;
513 int sys_errno;
514
515 ret = tstream_writev_queue_recv(subreq, &sys_errno);
516 TALLOC_FREE(subreq);
517 if (ret == -1) {
518 NTSTATUS status = map_nt_error_from_unix(sys_errno);
519 smbd_server_connection_terminate(sconn, nt_errstr(status));
520 return;
521 }
522
523 TALLOC_FREE(state);
524 }
525
526 static NTSTATUS smbd_smb2_request_process_cancel(struct smbd_smb2_request *req)
527 {
528 struct smbd_server_connection *sconn = req->sconn;
529 struct smbd_smb2_request *cur;
530 const uint8_t *inhdr;
531 int i = req->current_idx;
532 uint32_t flags;
533 uint64_t search_message_id;
534 uint64_t search_async_id;
535
536 inhdr = (const uint8_t *)req->in.vector[i].iov_base;
537
538 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
539 search_message_id = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
540 search_async_id = BVAL(inhdr, SMB2_HDR_PID);
541
542 /*
543 * we don't need the request anymore
544 * cancel requests never have a response
545 */
546 TALLOC_FREE(req);
547
548 for (cur = sconn->smb2.requests; cur; cur = cur->next) {
549 const uint8_t *outhdr;
550 uint64_t message_id;
551 uint64_t async_id;
552
553 i = cur->current_idx;
554
555 outhdr = (const uint8_t *)cur->out.vector[i].iov_base;
556
557 message_id = BVAL(outhdr, SMB2_HDR_MESSAGE_ID);
558 async_id = BVAL(outhdr, SMB2_HDR_PID);
559
560 if (flags & SMB2_HDR_FLAG_ASYNC) {
561 if (search_async_id == async_id) {
562 break;
563 }
564 } else {
565 if (search_message_id == message_id) {
566 break;
567 }
568 }
569 }
570
571 if (cur && cur->subreq) {
572 tevent_req_cancel(cur->subreq);
573 }
574
575 return NT_STATUS_OK;
576 }
577
578 static NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req)
579 {
580 const uint8_t *inhdr;
581 int i = req->current_idx;
582 uint16_t opcode;
583 uint32_t flags;
584 NTSTATUS status;
585 NTSTATUS session_status;
586 uint32_t allowed_flags;
587
588 inhdr = (const uint8_t *)req->in.vector[i].iov_base;
589
590 /* TODO: verify more things */
591
592 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
593 opcode = IVAL(inhdr, SMB2_HDR_OPCODE);
594 DEBUG(10,("smbd_smb2_request_dispatch: opcode[%u]\n", opcode));
595
596 allowed_flags = SMB2_HDR_FLAG_CHAINED |
597 SMB2_HDR_FLAG_SIGNED |
598 SMB2_HDR_FLAG_DFS;
599 if (opcode == SMB2_OP_CANCEL) {
600 allowed_flags |= SMB2_HDR_FLAG_ASYNC;
601 }
602 if ((flags & ~allowed_flags) != 0) {
603 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
604 }
605
606 session_status = smbd_smb2_request_check_session(req);
607
608 req->do_signing = false;
609 if (flags & SMB2_HDR_FLAG_SIGNED) {
610 if (!NT_STATUS_IS_OK(session_status)) {
611 return smbd_smb2_request_error(req, session_status);
612 }
613
614 req->do_signing = true;
615 status = smb2_signing_check_pdu(req->session->session_key,
616 &req->in.vector[i], 3);
617 if (!NT_STATUS_IS_OK(status)) {
618 return smbd_smb2_request_error(req, status);
619 }
620 } else if (req->session && req->session->do_signing) {
621 return smbd_smb2_request_error(req, NT_STATUS_ACCESS_DENIED);
622 }
623
624 if (flags & SMB2_HDR_FLAG_CHAINED) {
625 /*
626 * This check is mostly for giving the correct error code
627 * for compounded requests.
628 *
629 * TODO: we may need to move this after the session
630 * and tcon checks.
631 */
632 if (!NT_STATUS_IS_OK(req->next_status)) {
633 return smbd_smb2_request_error(req, req->next_status);
634 }
635 } else {
636 req->compat_chain_fsp = NULL;
637 }
638
639 switch (opcode) {
640 case SMB2_OP_NEGPROT:
641 return smbd_smb2_request_process_negprot(req);
642
643 case SMB2_OP_SESSSETUP:
644 return smbd_smb2_request_process_sesssetup(req);
645
646 case SMB2_OP_LOGOFF:
647 if (!NT_STATUS_IS_OK(session_status)) {
648 return smbd_smb2_request_error(req, session_status);
649 }
650 return smbd_smb2_request_process_logoff(req);
651
652 case SMB2_OP_TCON:
653 if (!NT_STATUS_IS_OK(session_status)) {
654 return smbd_smb2_request_error(req, session_status);
655 }
656 status = smbd_smb2_request_check_session(req);
657 if (!NT_STATUS_IS_OK(status)) {
658 return smbd_smb2_request_error(req, status);
659 }
660 return smbd_smb2_request_process_tcon(req);
661
662 case SMB2_OP_TDIS:
663 if (!NT_STATUS_IS_OK(session_status)) {
664 return smbd_smb2_request_error(req, session_status);
665 }
666 status = smbd_smb2_request_check_tcon(req);
667 if (!NT_STATUS_IS_OK(status)) {
668 return smbd_smb2_request_error(req, status);
669 }
670 return smbd_smb2_request_process_tdis(req);
671
672 case SMB2_OP_CREATE:
673 if (!NT_STATUS_IS_OK(session_status)) {
674 return smbd_smb2_request_error(req, session_status);
675 }
676 status = smbd_smb2_request_check_tcon(req);
677 if (!NT_STATUS_IS_OK(status)) {
678 return smbd_smb2_request_error(req, status);
679 }
680 return smbd_smb2_request_process_create(req);
681
682 case SMB2_OP_CLOSE:
683 if (!NT_STATUS_IS_OK(session_status)) {
684 return smbd_smb2_request_error(req, session_status);
685 }
686 status = smbd_smb2_request_check_tcon(req);
687 if (!NT_STATUS_IS_OK(status)) {
688 return smbd_smb2_request_error(req, status);
689 }
690 return smbd_smb2_request_process_close(req);
691
692 case SMB2_OP_FLUSH:
693 if (!NT_STATUS_IS_OK(session_status)) {
694 return smbd_smb2_request_error(req, session_status);
695 }
696 status = smbd_smb2_request_check_tcon(req);
697 if (!NT_STATUS_IS_OK(status)) {
698 return smbd_smb2_request_error(req, status);
699 }
700 return smbd_smb2_request_process_flush(req);
701
702 case SMB2_OP_READ:
703 if (!NT_STATUS_IS_OK(session_status)) {
704 return smbd_smb2_request_error(req, session_status);
705 }
706 status = smbd_smb2_request_check_tcon(req);
707 if (!NT_STATUS_IS_OK(status)) {
708 return smbd_smb2_request_error(req, status);
709 }
710 return smbd_smb2_request_process_read(req);
711
712 case SMB2_OP_WRITE:
713 if (!NT_STATUS_IS_OK(session_status)) {
714 return smbd_smb2_request_error(req, session_status);
715 }
716 status = smbd_smb2_request_check_tcon(req);
717 if (!NT_STATUS_IS_OK(status)) {
718 return smbd_smb2_request_error(req, status);
719 }
720 return smbd_smb2_request_process_write(req);
721
722 case SMB2_OP_LOCK:
723 if (!NT_STATUS_IS_OK(session_status)) {
724 return smbd_smb2_request_error(req, session_status);
725 }
726 status = smbd_smb2_request_check_tcon(req);
727 if (!NT_STATUS_IS_OK(status)) {
728 return smbd_smb2_request_error(req, status);
729 }
730 return smbd_smb2_request_process_lock(req);
731
732 case SMB2_OP_IOCTL:
733 if (!NT_STATUS_IS_OK(session_status)) {
734 return smbd_smb2_request_error(req, session_status);
735 }
736 status = smbd_smb2_request_check_tcon(req);
737 if (!NT_STATUS_IS_OK(status)) {
738 return smbd_smb2_request_error(req, status);
739 }
740 return smbd_smb2_request_process_ioctl(req);
741
742 case SMB2_OP_CANCEL:
743 return smbd_smb2_request_process_cancel(req);
744
745 case SMB2_OP_KEEPALIVE:
746 return smbd_smb2_request_process_keepalive(req);
747
748 case SMB2_OP_FIND:
749 if (!NT_STATUS_IS_OK(session_status)) {
750 return smbd_smb2_request_error(req, session_status);
751 }
752 status = smbd_smb2_request_check_tcon(req);
753 if (!NT_STATUS_IS_OK(status)) {
754 return smbd_smb2_request_error(req, status);
755 }
756 return smbd_smb2_request_process_find(req);
757
758 case SMB2_OP_NOTIFY:
759 if (!NT_STATUS_IS_OK(session_status)) {
760 return smbd_smb2_request_error(req, session_status);
761 }
762 status = smbd_smb2_request_check_tcon(req);
763 if (!NT_STATUS_IS_OK(status)) {
764 return smbd_smb2_request_error(req, status);
765 }
766 return smbd_smb2_request_process_notify(req);
767
768 case SMB2_OP_GETINFO:
769 if (!NT_STATUS_IS_OK(session_status)) {
770 return smbd_smb2_request_error(req, session_status);
771 }
772 status = smbd_smb2_request_check_tcon(req);
773 if (!NT_STATUS_IS_OK(status)) {
774 return smbd_smb2_request_error(req, status);
775 }
776 return smbd_smb2_request_process_getinfo(req);
777
778 case SMB2_OP_SETINFO:
779 if (!NT_STATUS_IS_OK(session_status)) {
780 return smbd_smb2_request_error(req, session_status);
781 }
782 status = smbd_smb2_request_check_tcon(req);
783 if (!NT_STATUS_IS_OK(status)) {
784 return smbd_smb2_request_error(req, status);
785 }
786 return smbd_smb2_request_process_setinfo(req);
787
788 case SMB2_OP_BREAK:
789 if (!NT_STATUS_IS_OK(session_status)) {
790 return smbd_smb2_request_error(req, session_status);
791 }
792 status = smbd_smb2_request_check_tcon(req);
793 if (!NT_STATUS_IS_OK(status)) {
794 return smbd_smb2_request_error(req, status);
795 }
796 return smbd_smb2_request_process_break(req);
797 }
798
799 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
800 }
801
802 static void smbd_smb2_request_dispatch_compound(struct tevent_req *subreq);
803 static void smbd_smb2_request_writev_done(struct tevent_req *subreq);
804
805 static NTSTATUS smbd_smb2_request_reply(struct smbd_smb2_request *req)
806 {
807 struct tevent_req *subreq;
808
809 req->subreq = NULL;
810
811 smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
812
813 if (req->do_signing) {
814 int i = req->current_idx;
815 NTSTATUS status;
816 status = smb2_signing_sign_pdu(req->session->session_key,
817 &req->out.vector[i], 3);
818 if (!NT_STATUS_IS_OK(status)) {
819 return status;
820 }
821 }
822
823 req->current_idx += 3;
824
825 if (req->current_idx < req->out.vector_count) {
826 struct timeval zero = timeval_zero();
827 subreq = tevent_wakeup_send(req,
828 req->sconn->smb2.event_ctx,
829 zero);
830 if (subreq == NULL) {
831 return NT_STATUS_NO_MEMORY;
832 }
833 tevent_req_set_callback(subreq,
834 smbd_smb2_request_dispatch_compound,
835 req);
836
837 return NT_STATUS_OK;
838 }
839
840 subreq = tstream_writev_queue_send(req,
841 req->sconn->smb2.event_ctx,
842 req->sconn->smb2.stream,
843 req->sconn->smb2.send_queue,
844 req->out.vector,
845 req->out.vector_count);
846 if (subreq == NULL) {
847 return NT_STATUS_NO_MEMORY;
848 }
849 tevent_req_set_callback(subreq, smbd_smb2_request_writev_done, req);
850
851 return NT_STATUS_OK;
852 }
853
854 static void smbd_smb2_request_dispatch_compound(struct tevent_req *subreq)
855 {
856 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
857 struct smbd_smb2_request);
858 struct smbd_server_connection *sconn = req->sconn;
859 NTSTATUS status;
860
861 tevent_wakeup_recv(subreq);
862 TALLOC_FREE(subreq);
863
864 DEBUG(10,("smbd_smb2_request_dispatch_compound: idx[%d] of %d vectors\n",
865 req->current_idx, req->in.vector_count));
866
867 status = smbd_smb2_request_dispatch(req);
868 if (!NT_STATUS_IS_OK(status)) {
869 smbd_server_connection_terminate(sconn, nt_errstr(status));
870 return;
871 }
872 }
873
874 static void smbd_smb2_request_writev_done(struct tevent_req *subreq)
875 {
876 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
877 struct smbd_smb2_request);
878 struct smbd_server_connection *sconn = req->sconn;
879 int ret;
880 int sys_errno;
881
882 ret = tstream_writev_queue_recv(subreq, &sys_errno);
883 TALLOC_FREE(subreq);
884 TALLOC_FREE(req);
885 if (ret == -1) {
886 NTSTATUS status = map_nt_error_from_unix(sys_errno);
887 smbd_server_connection_terminate(sconn, nt_errstr(status));
888 return;
889 }
890 }
891
892 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
893 NTSTATUS status,
894 DATA_BLOB *info,
895 const char *location)
896 {
897 uint8_t *outhdr;
898 uint8_t *outbody;
899 int i = req->current_idx;
900
901 DEBUG(10,("smbd_smb2_request_error_ex: idx[%d] status[%s] |%s| at %s\n",
902 i, nt_errstr(status), info ? " +info" : "",
903 location));
904
905 outhdr = (uint8_t *)req->out.vector[i].iov_base;
906
907 SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
908
909 outbody = outhdr + SMB2_HDR_BODY;
910
911 req->out.vector[i+1].iov_base = (void *)outbody;
912 req->out.vector[i+1].iov_len = 8;
913
914 if (info) {
915 SIVAL(outbody, 0x04, info->length);
916 req->out.vector[i+2].iov_base = (void *)info->data;
917 req->out.vector[i+2].iov_len = info->length;
918 } else {
919 req->out.vector[i+2].iov_base = NULL;
920 req->out.vector[i+2].iov_len = 0;
921 }
922
923 /*
924 * if a request fails, all other remaining
925 * compounded requests should fail too
926 */
927 req->next_status = NT_STATUS_INVALID_PARAMETER;
928
929 return smbd_smb2_request_reply(req);
930 }
931
932 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
933 NTSTATUS status,
934 DATA_BLOB body, DATA_BLOB *dyn,
935 const char *location)
936 {
937 uint8_t *outhdr;
938 uint8_t *outdyn;
939 int i = req->current_idx;
940 uint32_t next_command_ofs;
941
942 DEBUG(10,("smbd_smb2_request_done_ex: "
943 "idx[%d] status[%s] body[%u] dyn[%s:%u] at %s\n",
944 i, nt_errstr(status), (unsigned int)body.length,
945 dyn ? "yes": "no",
946 (unsigned int)(dyn ? dyn->length : 0),
947 location));
948
949 if (body.length < 2) {
950 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
951 }
952
953 if ((body.length % 2) != 0) {
954 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
955 }
956
957 outhdr = (uint8_t *)req->out.vector[i].iov_base;
958 /* the fallback dynamic buffer */
959 outdyn = outhdr + SMB2_HDR_BODY + 8;
960
961 next_command_ofs = IVAL(outhdr, SMB2_HDR_NEXT_COMMAND);
962 SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
963
964 req->out.vector[i+1].iov_base = (void *)body.data;
965 req->out.vector[i+1].iov_len = body.length;
966
967 if (dyn) {
968 req->out.vector[i+2].iov_base = (void *)dyn->data;
969 req->out.vector[i+2].iov_len = dyn->length;
970 } else {
971 req->out.vector[i+2].iov_base = NULL;
972 req->out.vector[i+2].iov_len = 0;
973 }
974
975 /* see if we need to recalculate the offset to the next response */
976 if (next_command_ofs > 0) {
977 next_command_ofs = SMB2_HDR_BODY;
978 next_command_ofs += req->out.vector[i+1].iov_len;
979 next_command_ofs += req->out.vector[i+2].iov_len;
980 }
981
982 if ((next_command_ofs % 8) != 0) {
983 size_t pad_size = 8 - (next_command_ofs % 8);
984 if (req->out.vector[i+2].iov_len == 0) {
985 /*
986 * if the dyn buffer is empty
987 * we can use it to add padding
988 */
989 uint8_t *pad;
990
991 pad = talloc_zero_array(req->out.vector,
992 uint8_t, pad_size);
993 if (pad == NULL) {
994 return smbd_smb2_request_error(req,
995 NT_STATUS_NO_MEMORY);
996 }
997
998 req->out.vector[i+2].iov_base = (void *)pad;
999 req->out.vector[i+2].iov_len = pad_size;
1000 } else {
1001 /*
1002 * For now we copy the dynamic buffer
1003 * and add the padding to the new buffer
1004 */
1005 size_t old_size;
1006 uint8_t *old_dyn;
1007 size_t new_size;
1008 uint8_t *new_dyn;
1009
1010 old_size = req->out.vector[i+2].iov_len;
1011 old_dyn = (uint8_t *)req->out.vector[i+2].iov_base;
1012
1013 new_size = old_size + pad_size;
1014 new_dyn = talloc_array(req->out.vector,
1015 uint8_t, new_size);
1016 if (new_dyn == NULL) {
1017 return smbd_smb2_request_error(req,
1018 NT_STATUS_NO_MEMORY);
1019 }
1020
1021 memcpy(new_dyn, old_dyn, old_size);
1022 memset(new_dyn + old_size, 0, pad_size);
1023
1024 req->out.vector[i+2].iov_base = (void *)new_dyn;
1025 req->out.vector[i+2].iov_len = new_size;
1026
1027 TALLOC_FREE(old_dyn);
1028 }
1029 next_command_ofs += pad_size;
1030 }
1031
1032 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
1033
1034 return smbd_smb2_request_reply(req);
1035 }
1036
1037 struct smbd_smb2_send_oplock_break_state {
1038 struct smbd_server_connection *sconn;
1039 uint8_t buf[4 + SMB2_HDR_BODY + 0x18];
1040 struct iovec vector;
1041 };
1042
1043 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq);
1044
1045 NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
1046 uint64_t file_id_persistent,
1047 uint64_t file_id_volatile,
1048 uint8_t oplock_level)
1049 {
1050 struct smbd_smb2_send_oplock_break_state *state;
1051 struct tevent_req *subreq;
1052 uint8_t *hdr;
1053 uint8_t *body;
1054
1055 state = talloc(sconn, struct smbd_smb2_send_oplock_break_state);
1056 if (state == NULL) {
1057 return NT_STATUS_NO_MEMORY;
1058 }
1059 state->sconn = sconn;
1060
1061 state->vector.iov_base = (void *)state->buf;
1062 state->vector.iov_len = sizeof(state->buf);
1063
1064 _smb2_setlen(state->buf, sizeof(state->buf) - 4);
1065 hdr = state->buf + 4;
1066 body = hdr + SMB2_HDR_BODY;
1067
1068 SIVAL(hdr, 0, SMB2_MAGIC);
1069 SSVAL(hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
1070 SSVAL(hdr, SMB2_HDR_EPOCH, 0);
1071 SIVAL(hdr, SMB2_HDR_STATUS, 0);
1072 SSVAL(hdr, SMB2_HDR_OPCODE, SMB2_OP_BREAK);
1073 SSVAL(hdr, SMB2_HDR_CREDIT, 0);
1074 SIVAL(hdr, SMB2_HDR_FLAGS, SMB2_HDR_FLAG_REDIRECT);
1075 SIVAL(hdr, SMB2_HDR_NEXT_COMMAND, 0);
1076 SBVAL(hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
1077 SIVAL(hdr, SMB2_HDR_PID, 0);
1078 SIVAL(hdr, SMB2_HDR_TID, 0);
1079 SBVAL(hdr, SMB2_HDR_SESSION_ID, 0);
1080 memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
1081
1082 SSVAL(body, 0x00, 0x18);
1083
1084 SCVAL(body, 0x02, oplock_level);
1085 SCVAL(body, 0x03, 0); /* reserved */
1086 SIVAL(body, 0x04, 0); /* reserved */
1087 SBVAL(body, 0x08, file_id_persistent);
1088 SBVAL(body, 0x10, file_id_volatile);
1089
1090 subreq = tstream_writev_queue_send(state,
1091 sconn->smb2.event_ctx,
1092 sconn->smb2.stream,
1093 sconn->smb2.send_queue,
1094 &state->vector, 1);
1095 if (subreq == NULL) {
1096 return NT_STATUS_NO_MEMORY;
1097 }
1098 tevent_req_set_callback(subreq,
1099 smbd_smb2_oplock_break_writev_done,
1100 state);
1101
1102 return NT_STATUS_OK;
1103 }
1104
1105 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq)
1106 {
1107 struct smbd_smb2_send_oplock_break_state *state =
1108 tevent_req_callback_data(subreq,
1109 struct smbd_smb2_send_oplock_break_state);
1110 struct smbd_server_connection *sconn = state->sconn;
1111 int ret;
1112 int sys_errno;
1113
1114 ret = tstream_writev_queue_recv(subreq, &sys_errno);
1115 TALLOC_FREE(subreq);
1116 if (ret == -1) {
1117 NTSTATUS status = map_nt_error_from_unix(sys_errno);
1118 smbd_server_connection_terminate(sconn, nt_errstr(status));
1119 return;
1120 }
1121
1122 TALLOC_FREE(state);
1123 }
1124
1125 struct smbd_smb2_request_read_state {
1126 size_t missing;
1127 bool asked_for_header;
1128 struct smbd_smb2_request *smb2_req;
1129 };
1130
1131 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1132 void *private_data,
1133 TALLOC_CTX *mem_ctx,
1134 struct iovec **_vector,
1135 size_t *_count);
1136 static void smbd_smb2_request_read_done(struct tevent_req *subreq);
1137
1138 static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx,
1139 struct tevent_context *ev,
1140 struct smbd_server_connection *sconn)
1141 {
1142 struct tevent_req *req;
1143 struct smbd_smb2_request_read_state *state;
1144 struct tevent_req *subreq;
1145
1146 req = tevent_req_create(mem_ctx, &state,
1147 struct smbd_smb2_request_read_state);
1148 if (req == NULL) {
1149 return NULL;
1150 }
1151 state->missing = 0;
1152 state->asked_for_header = false;
1153
1154 state->smb2_req = smbd_smb2_request_allocate(state);
1155 if (tevent_req_nomem(state->smb2_req, req)) {
1156 return tevent_req_post(req, ev);
1157 }
1158 state->smb2_req->sconn = sconn;
1159
1160 subreq = tstream_readv_pdu_queue_send(state, ev, sconn->smb2.stream,
1161 sconn->smb2.recv_queue,
1162 smbd_smb2_request_next_vector,
1163 state);
1164 if (tevent_req_nomem(subreq, req)) {
1165 return tevent_req_post(req, ev);
1166 }
1167 tevent_req_set_callback(subreq, smbd_smb2_request_read_done, req);
1168
1169 return req;
1170 }
1171
1172 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1173 void *private_data,
1174 TALLOC_CTX *mem_ctx,
1175 struct iovec **_vector,
1176 size_t *_count)
1177 {
1178 struct smbd_smb2_request_read_state *state =
1179 talloc_get_type_abort(private_data,
1180 struct smbd_smb2_request_read_state);
1181 struct smbd_smb2_request *req = state->smb2_req;
1182 struct iovec *vector;
1183 int idx = req->in.vector_count;
1184 size_t len = 0;
1185 uint8_t *buf = NULL;
1186
1187 if (req->in.vector_count == 0) {
1188 /*
1189 * first we need to get the NBT header
1190 */
1191 req->in.vector = talloc_array(req, struct iovec,
1192 req->in.vector_count + 1);
1193 if (req->in.vector == NULL) {
1194 return -1;
1195 }
1196 req->in.vector_count += 1;
1197
1198 req->in.vector[idx].iov_base = (void *)req->in.nbt_hdr;
1199 req->in.vector[idx].iov_len = 4;
1200
1201 vector = talloc_array(mem_ctx, struct iovec, 1);
1202 if (vector == NULL) {
1203 return -1;
1204 }
1205
1206 vector[0] = req->in.vector[idx];
1207
1208 *_vector = vector;
1209 *_count = 1;
1210 return 0;
1211 }
1212
1213 if (req->in.vector_count == 1) {
1214 /*
1215 * Now we analyze the NBT header
1216 */
1217 state->missing = smb2_len(req->in.vector[0].iov_base);
1218
1219 if (state->missing == 0) {
1220 /* if there're no remaining bytes, we're done */
1221 *_vector = NULL;
1222 *_count = 0;
1223 return 0;
1224 }
1225
1226 req->in.vector = talloc_realloc(req, req->in.vector,
1227 struct iovec,
1228 req->in.vector_count + 1);
1229 if (req->in.vector == NULL) {
1230 return -1;
1231 }
1232 req->in.vector_count += 1;
1233
1234 if (CVAL(req->in.vector[0].iov_base, 0) != 0) {
1235 /*
1236 * it's a special NBT message,
1237 * so get all remaining bytes
1238 */
1239 len = state->missing;
1240 } else if (state->missing < (SMB2_HDR_BODY + 2)) {
1241 /*
1242 * it's an invalid message, just read what we can get
1243 * and let the caller handle the error
1244 */
1245 len = state->missing;
1246 } else {
1247 /*
1248 * We assume it's a SMB2 request,
1249 * and we first get the header and the
1250 * first 2 bytes (the struct size) of the body
1251 */
1252 len = SMB2_HDR_BODY + 2;
1253
1254 state->asked_for_header = true;
1255 }
1256
1257 state->missing -= len;
1258
1259 buf = talloc_array(req->in.vector, uint8_t, len);
1260 if (buf == NULL) {
1261 return -1;
1262 }
1263
1264 req->in.vector[idx].iov_base = (void *)buf;
1265 req->in.vector[idx].iov_len = len;
1266
1267 vector = talloc_array(mem_ctx, struct iovec, 1);
1268 if (vector == NULL) {
1269 return -1;
1270 }
1271
1272 vector[0] = req->in.vector[idx];
1273
1274 *_vector = vector;
1275 *_count = 1;
1276 return 0;
1277 }
1278
1279 if (state->missing == 0) {
1280 /* if there're no remaining bytes, we're done */
1281 *_vector = NULL;
1282 *_count = 0;
1283 return 0;
1284 }
1285
1286 if (state->asked_for_header) {
1287 const uint8_t *hdr;
1288 size_t full_size;
1289 size_t next_command_ofs;
1290 size_t body_size;
1291 uint8_t *body;
1292 size_t dyn_size;
1293 uint8_t *dyn;
1294 bool invalid = false;
1295
1296 state->asked_for_header = false;
1297
1298 /*
1299 * We got the SMB2 header and the first 2 bytes
1300 * of the body. We fix the size to just the header
1301 * and manually copy the 2 first bytes to the body section
1302 */
1303 req->in.vector[idx-1].iov_len = SMB2_HDR_BODY;
1304 hdr = (const uint8_t *)req->in.vector[idx-1].iov_base;
1305
1306 /* allocate vectors for body and dynamic areas */
1307 req->in.vector = talloc_realloc(req, req->in.vector,
1308 struct iovec,
1309 req->in.vector_count + 2);
1310 if (req->in.vector == NULL) {
1311 return -1;
1312 }
1313 req->in.vector_count += 2;
1314
1315 full_size = state->missing + SMB2_HDR_BODY + 2;
1316 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
1317 body_size = SVAL(hdr, SMB2_HDR_BODY);
1318
1319 if (next_command_ofs != 0) {
1320 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
1321 /*
1322 * this is invalid, just return a zero
1323 * body and let the caller deal with the error
1324 */
1325 invalid = true;
1326 } else if (next_command_ofs > full_size) {
1327 /*
1328 * this is invalid, just return a zero
1329 * body and let the caller deal with the error
1330 */
1331 invalid = true;
1332 } else {
1333 full_size = next_command_ofs;
1334 }
1335 }
1336
1337 if (!invalid) {
1338 if (body_size < 2) {
1339 /*
1340 * this is invalid, just return a zero
1341 * body and let the caller deal with the error
1342 */
1343 invalid = true;
1344 }
1345
1346 if ((body_size % 2) != 0) {
1347 body_size -= 1;
1348 }
1349
1350 if (body_size > (full_size - SMB2_HDR_BODY)) {
1351 /*
1352 * this is invalid, just return a zero
1353 * body and let the caller deal with the error
1354 */
1355 invalid = true;
1356 }
1357 }
1358
1359 if (invalid) {
1360 /* the caller should check this */
1361 body_size = 2;
1362 }
1363
1364 dyn_size = full_size - (SMB2_HDR_BODY + body_size);
1365
1366 state->missing -= (body_size - 2) + dyn_size;
1367
1368 body = talloc_array(req->in.vector, uint8_t, body_size);
1369 if (body == NULL) {
1370 return -1;
1371 }
1372
1373 dyn = talloc_array(req->in.vector, uint8_t, dyn_size);
1374 if (dyn == NULL) {
1375 return -1;
1376 }
1377
1378 req->in.vector[idx].iov_base = (void *)body;
1379 req->in.vector[idx].iov_len = body_size;
1380 req->in.vector[idx+1].iov_base = (void *)dyn;
1381 req->in.vector[idx+1].iov_len = dyn_size;
1382
1383 vector = talloc_array(mem_ctx, struct iovec, 2);
1384 if (vector == NULL) {
1385 return -1;
1386 }
1387
1388 /*
1389 * the first 2 bytes of the body were already fetched
1390 * together with the header
1391 */
1392 memcpy(body, hdr + SMB2_HDR_BODY, 2);
1393 vector[0].iov_base = body + 2;
1394 vector[0].iov_len = body_size - 2;
1395
1396 vector[1] = req->in.vector[idx+1];
1397
1398 *_vector = vector;
1399 *_count = 2;
1400 return 0;
1401 }
1402
1403 /*
1404 * when we endup here, we're looking for a new SMB2 request
1405 * next. And we ask for its header and the first 2 bytes of
1406 * the body (like we did for the first SMB2 request).
1407 */
1408
1409 req->in.vector = talloc_realloc(req, req->in.vector,
1410 struct iovec,
1411 req->in.vector_count + 1);
1412 if (req->in.vector == NULL) {
1413 return -1;
1414 }
1415 req->in.vector_count += 1;
1416
1417 /*
1418 * We assume it's a SMB2 request,
1419 * and we first get the header and the
1420 * first 2 bytes (the struct size) of the body
1421 */
1422 len = SMB2_HDR_BODY + 2;
1423
1424 if (len > state->missing) {
1425 /* let the caller handle the error */
1426 len = state->missing;
1427 }
1428
1429 state->missing -= len;
1430 state->asked_for_header = true;
1431
1432 buf = talloc_array(req->in.vector, uint8_t, len);
1433 if (buf == NULL) {
1434 return -1;
1435 }
1436
1437 req->in.vector[idx].iov_base = (void *)buf;
1438 req->in.vector[idx].iov_len = len;
1439
1440 vector = talloc_array(mem_ctx, struct iovec, 1);
1441 if (vector == NULL) {
1442 return -1;
1443 }
1444
1445 vector[0] = req->in.vector[idx];
1446
1447 *_vector = vector;
1448 *_count = 1;
1449 return 0;
1450 }
1451
1452 static void smbd_smb2_request_read_done(struct tevent_req *subreq)
1453 {
1454 struct tevent_req *req =
1455 tevent_req_callback_data(subreq,
1456 struct tevent_req);
1457 int ret;
1458 int sys_errno;
1459 NTSTATUS status;
1460
1461 ret = tstream_readv_pdu_queue_recv(subreq, &sys_errno);
1462 if (ret == -1) {
1463 status = map_nt_error_from_unix(sys_errno);
1464 tevent_req_nterror(req, status);
1465 return;
1466 }
1467
1468 tevent_req_done(req);
1469 }
1470
1471 static NTSTATUS smbd_smb2_request_read_recv(struct tevent_req *req,
1472 TALLOC_CTX *mem_ctx,
1473 struct smbd_smb2_request **_smb2_req)
1474 {
1475 struct smbd_smb2_request_read_state *state =
1476 tevent_req_data(req,
1477 struct smbd_smb2_request_read_state);
1478 NTSTATUS status;
1479
1480 if (tevent_req_is_nterror(req, &status)) {
1481 tevent_req_received(req);
1482 return status;
1483 }
1484
1485 talloc_steal(mem_ctx, state->smb2_req->mem_pool);
1486 *_smb2_req = state->smb2_req;
1487 tevent_req_received(req);
1488 return NT_STATUS_OK;
1489 }
1490
1491 static void smbd_smb2_request_incoming(struct tevent_req *subreq);
1492
1493 void smbd_smb2_first_negprot(struct smbd_server_connection *sconn,
1494 const uint8_t *inbuf, size_t size)
1495 {
1496 NTSTATUS status;
1497 struct smbd_smb2_request *req;
1498 struct tevent_req *subreq;
1499
1500 DEBUG(10,("smbd_smb2_first_negprot: packet length %u\n",
1501 (unsigned int)size));
1502
1503 status = smbd_initialize_smb2(sconn);
1504 if (!NT_STATUS_IS_OK(status)) {
1505 smbd_server_connection_terminate(sconn, nt_errstr(status));
1506 return;
1507 }
1508
1509 status = smbd_smb2_request_create(sconn, inbuf, size, &req);
1510 if (!NT_STATUS_IS_OK(status)) {
1511 smbd_server_connection_terminate(sconn, nt_errstr(status));
1512 return;
1513 }
1514
1515 status = smbd_smb2_request_setup_out(req, (uint16_t)lp_maxmux());
1516 if (!NT_STATUS_IS_OK(status)) {
1517 smbd_server_connection_terminate(sconn, nt_errstr(status));
1518 return;
1519 }
1520
1521 status = smbd_smb2_request_dispatch(req);
1522 if (!NT_STATUS_IS_OK(status)) {
1523 smbd_server_connection_terminate(sconn, nt_errstr(status));
1524 return;
1525 }
1526
1527 /* ask for the next request */
1528 subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
1529 if (subreq == NULL) {
1530 smbd_server_connection_terminate(sconn, "no memory for reading");
1531 return;
1532 }
1533 tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
1534 }
1535
1536 static void smbd_smb2_request_incoming(struct tevent_req *subreq)
1537 {
1538 uint16_t creds_requested = 0;
1539 struct smbd_server_connection *sconn = tevent_req_callback_data(subreq,
1540 struct smbd_server_connection);
1541 NTSTATUS status;
1542 struct smbd_smb2_request *req = NULL;
1543
1544 status = smbd_smb2_request_read_recv(subreq, sconn, &req);
1545 TALLOC_FREE(subreq);
1546 if (!NT_STATUS_IS_OK(status)) {
1547 smbd_server_connection_terminate(sconn, nt_errstr(status));
1548 return;
1549 }
1550
1551 if (req->in.nbt_hdr[0] != 0x00) {
1552 DEBUG(1,("smbd_smb2_request_incoming: ignore NBT[0x%02X] msg\n",
1553 req->in.nbt_hdr[0]));
1554 TALLOC_FREE(req);
1555 goto next;
1556 }
1557
1558 req->current_idx = 1;
1559
1560 DEBUG(10,("smbd_smb2_request_incoming: idx[%d] of %d vectors\n",
1561 req->current_idx, req->in.vector_count));
1562
1563 status = smbd_smb2_request_validate(req, &creds_requested);
1564 if (!NT_STATUS_IS_OK(status)) {
1565 smbd_server_connection_terminate(sconn, nt_errstr(status));
1566 return;
1567 }
1568
1569 status = smbd_smb2_request_setup_out(req, creds_requested);
1570 if (!NT_STATUS_IS_OK(status)) {
1571 smbd_server_connection_terminate(sconn, nt_errstr(status));
1572 return;
1573 }
1574
1575 status = smbd_smb2_request_dispatch(req);
1576 if (!NT_STATUS_IS_OK(status)) {
1577 smbd_server_connection_terminate(sconn, nt_errstr(status));
1578 return;
1579 }
1580
1581 next:
1582 /* ask for the next request (this constructs the main loop) */
1583 subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
1584 if (subreq == NULL) {
1585 smbd_server_connection_terminate(sconn, "no memory for reading");
1586 return;
1587 }
1588 tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
1589 }
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