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Fix bug #8219 - SMB Panic from Windows 7 Client
[Samba.git] / source3 / smbd / smb2_server.c
blob8c75d0282438d75b248fc6bb10906d313eecc93f
1 /*
2 Unix SMB/CIFS implementation.
3 Core SMB2 server
4
5 Copyright (C) Stefan Metzmacher 2009
6 Copyright (C) Jeremy Allison 2010
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "smbd/smbd.h"
24 #include "smbd/globals.h"
25 #include "../libcli/smb/smb_common.h"
26 #include "../lib/tsocket/tsocket.h"
27 #include "../lib/util/tevent_ntstatus.h"
28 #include "smbprofile.h"
29
30 #define OUTVEC_ALLOC_SIZE (SMB2_HDR_BODY + 9)
31
32 static const char *smb2_names[] = {
33 "SMB2_NEGPROT",
34 "SMB2_SESSSETUP",
35 "SMB2_LOGOFF",
36 "SMB2_TCON",
37 "SMB2_TDIS",
38 "SMB2_CREATE",
39 "SMB2_CLOSE",
40 "SMB2_FLUSH",
41 "SMB2_READ",
42 "SMB2_WRITE",
43 "SMB2_LOCK",
44 "SMB2_IOCTL",
45 "SMB2_CANCEL",
46 "SMB2_KEEPALIVE",
47 "SMB2_FIND",
48 "SMB2_NOTIFY",
49 "SMB2_GETINFO",
50 "SMB2_SETINFO",
51 "SMB2_BREAK"
52 };
53
54 const char *smb2_opcode_name(uint16_t opcode)
55 {
56 if (opcode > 0x12) {
57 return "Bad SMB2 opcode";
58 }
59 return smb2_names[opcode];
60 }
61
62 static void print_req_vectors(struct smbd_smb2_request *req)
63 {
64 int i;
65
66 for (i = 0; i < req->in.vector_count; i++) {
67 dbgtext("\treq->in.vector[%u].iov_len = %u\n",
68 (unsigned int)i,
69 (unsigned int)req->in.vector[i].iov_len);
70 }
71 for (i = 0; i < req->out.vector_count; i++) {
72 dbgtext("\treq->out.vector[%u].iov_len = %u\n",
73 (unsigned int)i,
74 (unsigned int)req->out.vector[i].iov_len);
75 }
76 }
77
78 bool smbd_is_smb2_header(const uint8_t *inbuf, size_t size)
79 {
80 if (size < (4 + SMB2_HDR_BODY)) {
81 return false;
82 }
83
84 if (IVAL(inbuf, 4) != SMB2_MAGIC) {
85 return false;
86 }
87
88 return true;
89 }
90
91 static NTSTATUS smbd_initialize_smb2(struct smbd_server_connection *sconn)
92 {
93 NTSTATUS status;
94 int ret;
95
96 TALLOC_FREE(sconn->smb1.fde);
97
98 sconn->smb2.event_ctx = smbd_event_context();
99
100 sconn->smb2.recv_queue = tevent_queue_create(sconn, "smb2 recv queue");
101 if (sconn->smb2.recv_queue == NULL) {
102 return NT_STATUS_NO_MEMORY;
103 }
104
105 sconn->smb2.send_queue = tevent_queue_create(sconn, "smb2 send queue");
106 if (sconn->smb2.send_queue == NULL) {
107 return NT_STATUS_NO_MEMORY;
108 }
109
110 sconn->smb2.sessions.idtree = idr_init(sconn);
111 if (sconn->smb2.sessions.idtree == NULL) {
112 return NT_STATUS_NO_MEMORY;
113 }
114 sconn->smb2.sessions.limit = 0x0000FFFE;
115 sconn->smb2.sessions.list = NULL;
116 sconn->smb2.seqnum_low = 0;
117 sconn->smb2.credits_granted = 0;
118 sconn->smb2.max_credits = lp_smb2_max_credits();
119 sconn->smb2.credits_bitmap = bitmap_talloc(sconn,
120 DEFAULT_SMB2_MAX_CREDIT_BITMAP_FACTOR*sconn->smb2.max_credits);
121 if (sconn->smb2.credits_bitmap == NULL) {
122 return NT_STATUS_NO_MEMORY;
123 }
124
125 ret = tstream_bsd_existing_socket(sconn, sconn->sock,
126 &sconn->smb2.stream);
127 if (ret == -1) {
128 status = map_nt_error_from_unix(errno);
129 return status;
130 }
131
132 /* Ensure child is set to non-blocking mode */
133 set_blocking(sconn->sock, false);
134 return NT_STATUS_OK;
135 }
136
137 #define smb2_len(buf) (PVAL(buf,3)|(PVAL(buf,2)<<8)|(PVAL(buf,1)<<16))
138 #define _smb2_setlen(_buf,len) do { \
139 uint8_t *buf = (uint8_t *)_buf; \
140 buf[0] = 0; \
141 buf[1] = ((len)&0xFF0000)>>16; \
142 buf[2] = ((len)&0xFF00)>>8; \
143 buf[3] = (len)&0xFF; \
144 } while (0)
145
146 static void smb2_setup_nbt_length(struct iovec *vector, int count)
147 {
148 size_t len = 0;
149 int i;
150
151 for (i=1; i < count; i++) {
152 len += vector[i].iov_len;
153 }
154
155 _smb2_setlen(vector[0].iov_base, len);
156 }
157
158 static int smbd_smb2_request_parent_destructor(struct smbd_smb2_request **req)
159 {
160 if (*req) {
161 (*req)->parent = NULL;
162 (*req)->mem_pool = NULL;
163 }
164
165 return 0;
166 }
167
168 static int smbd_smb2_request_destructor(struct smbd_smb2_request *req)
169 {
170 if (req->parent) {
171 *req->parent = NULL;
172 talloc_free(req->mem_pool);
173 }
174
175 return 0;
176 }
177
178 static struct smbd_smb2_request *smbd_smb2_request_allocate(TALLOC_CTX *mem_ctx)
179 {
180 TALLOC_CTX *mem_pool;
181 struct smbd_smb2_request **parent;
182 struct smbd_smb2_request *req;
183
184 #if 0
185 /* Enable this to find subtle valgrind errors. */
186 mem_pool = talloc_init("smbd_smb2_request_allocate");
187 #else
188 mem_pool = talloc_pool(mem_ctx, 8192);
189 #endif
190 if (mem_pool == NULL) {
191 return NULL;
192 }
193
194 parent = talloc(mem_pool, struct smbd_smb2_request *);
195 if (parent == NULL) {
196 talloc_free(mem_pool);
197 return NULL;
198 }
199
200 req = talloc_zero(parent, struct smbd_smb2_request);
201 if (req == NULL) {
202 talloc_free(mem_pool);
203 return NULL;
204 }
205 *parent = req;
206 req->mem_pool = mem_pool;
207 req->parent = parent;
208
209 talloc_set_destructor(parent, smbd_smb2_request_parent_destructor);
210 talloc_set_destructor(req, smbd_smb2_request_destructor);
211
212 return req;
213 }
214
215 static NTSTATUS smbd_smb2_request_create(struct smbd_server_connection *sconn,
216 const uint8_t *inbuf, size_t size,
217 struct smbd_smb2_request **_req)
218 {
219 struct smbd_smb2_request *req;
220 uint32_t protocol_version;
221 const uint8_t *inhdr = NULL;
222 off_t ofs = 0;
223 uint16_t cmd;
224 uint32_t next_command_ofs;
225
226 if (size < (4 + SMB2_HDR_BODY + 2)) {
227 DEBUG(0,("Invalid SMB2 packet length count %ld\n", (long)size));
228 return NT_STATUS_INVALID_PARAMETER;
229 }
230
231 inhdr = inbuf + 4;
232
233 protocol_version = IVAL(inhdr, SMB2_HDR_PROTOCOL_ID);
234 if (protocol_version != SMB2_MAGIC) {
235 DEBUG(0,("Invalid SMB packet: protocol prefix: 0x%08X\n",
236 protocol_version));
237 return NT_STATUS_INVALID_PARAMETER;
238 }
239
240 cmd = SVAL(inhdr, SMB2_HDR_OPCODE);
241 if (cmd != SMB2_OP_NEGPROT) {
242 DEBUG(0,("Invalid SMB packet: first request: 0x%04X\n",
243 cmd));
244 return NT_STATUS_INVALID_PARAMETER;
245 }
246
247 next_command_ofs = IVAL(inhdr, SMB2_HDR_NEXT_COMMAND);
248 if (next_command_ofs != 0) {
249 DEBUG(0,("Invalid SMB packet: next_command: 0x%08X\n",
250 next_command_ofs));
251 return NT_STATUS_INVALID_PARAMETER;
252 }
253
254 req = smbd_smb2_request_allocate(sconn);
255 if (req == NULL) {
256 return NT_STATUS_NO_MEMORY;
257 }
258 req->sconn = sconn;
259
260 talloc_steal(req, inbuf);
261
262 req->in.vector = talloc_array(req, struct iovec, 4);
263 if (req->in.vector == NULL) {
264 TALLOC_FREE(req);
265 return NT_STATUS_NO_MEMORY;
266 }
267 req->in.vector_count = 4;
268
269 memcpy(req->in.nbt_hdr, inbuf, 4);
270
271 ofs = 0;
272 req->in.vector[0].iov_base = (void *)req->in.nbt_hdr;
273 req->in.vector[0].iov_len = 4;
274 ofs += req->in.vector[0].iov_len;
275
276 req->in.vector[1].iov_base = (void *)(inbuf + ofs);
277 req->in.vector[1].iov_len = SMB2_HDR_BODY;
278 ofs += req->in.vector[1].iov_len;
279
280 req->in.vector[2].iov_base = (void *)(inbuf + ofs);
281 req->in.vector[2].iov_len = SVAL(inbuf, ofs) & 0xFFFE;
282 ofs += req->in.vector[2].iov_len;
283
284 if (ofs > size) {
285 return NT_STATUS_INVALID_PARAMETER;
286 }
287
288 req->in.vector[3].iov_base = (void *)(inbuf + ofs);
289 req->in.vector[3].iov_len = size - ofs;
290 ofs += req->in.vector[3].iov_len;
291
292 req->current_idx = 1;
293
294 *_req = req;
295 return NT_STATUS_OK;
296 }
297
298 static bool smb2_validate_message_id(struct smbd_server_connection *sconn,
299 const uint8_t *inhdr)
300 {
301 uint64_t message_id = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
302 struct bitmap *credits_bm = sconn->smb2.credits_bitmap;
303 uint16_t opcode = IVAL(inhdr, SMB2_HDR_OPCODE);
304 unsigned int bitmap_offset;
305
306 if (opcode == SMB2_OP_CANCEL) {
307 /* SMB2_CANCEL requests by definition resend messageids. */
308 return true;
309 }
310
311 if (message_id < sconn->smb2.seqnum_low ||
312 message_id > (sconn->smb2.seqnum_low +
313 (sconn->smb2.max_credits * DEFAULT_SMB2_MAX_CREDIT_BITMAP_FACTOR))) {
314 DEBUG(0,("smb2_validate_message_id: bad message_id "
315 "%llu (low = %llu, max = %lu)\n",
316 (unsigned long long)message_id,
317 (unsigned long long)sconn->smb2.seqnum_low,
318 (unsigned long)sconn->smb2.max_credits ));
319 return false;
320 }
321
322 /* client just used a credit. */
323 SMB_ASSERT(sconn->smb2.credits_granted > 0);
324 sconn->smb2.credits_granted -= 1;
325
326 /* Mark the message_id as seen in the bitmap. */
327 bitmap_offset = (unsigned int)(message_id %
328 (uint64_t)(sconn->smb2.max_credits * DEFAULT_SMB2_MAX_CREDIT_BITMAP_FACTOR));
329 if (bitmap_query(credits_bm, bitmap_offset)) {
330 DEBUG(0,("smb2_validate_message_id: duplicate message_id "
331 "%llu (bm offset %u)\n",
332 (unsigned long long)message_id,
333 bitmap_offset));
334 return false;
335 }
336 bitmap_set(credits_bm, bitmap_offset);
337
338 if (message_id == sconn->smb2.seqnum_low + 1) {
339 /* Move the window forward by all the message_id's
340 already seen. */
341 while (bitmap_query(credits_bm, bitmap_offset)) {
342 DEBUG(10,("smb2_validate_message_id: clearing "
343 "id %llu (position %u) from bitmap\n",
344 (unsigned long long)(sconn->smb2.seqnum_low + 1),
345 bitmap_offset ));
346 bitmap_clear(credits_bm, bitmap_offset);
347 sconn->smb2.seqnum_low += 1;
348 bitmap_offset = (bitmap_offset + 1) %
349 (sconn->smb2.max_credits * DEFAULT_SMB2_MAX_CREDIT_BITMAP_FACTOR);
350 }
351 }
352
353 return true;
354 }
355
356 static NTSTATUS smbd_smb2_request_validate(struct smbd_smb2_request *req)
357 {
358 int count;
359 int idx;
360 bool compound_related = false;
361
362 count = req->in.vector_count;
363
364 if (count < 4) {
365 /* It's not a SMB2 request */
366 return NT_STATUS_INVALID_PARAMETER;
367 }
368
369 for (idx=1; idx < count; idx += 3) {
370 const uint8_t *inhdr = NULL;
371 uint32_t flags;
372
373 if (req->in.vector[idx].iov_len != SMB2_HDR_BODY) {
374 return NT_STATUS_INVALID_PARAMETER;
375 }
376
377 if (req->in.vector[idx+1].iov_len < 2) {
378 return NT_STATUS_INVALID_PARAMETER;
379 }
380
381 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
382
383 /* Check the SMB2 header */
384 if (IVAL(inhdr, SMB2_HDR_PROTOCOL_ID) != SMB2_MAGIC) {
385 return NT_STATUS_INVALID_PARAMETER;
386 }
387
388 if (!smb2_validate_message_id(req->sconn, inhdr)) {
389 return NT_STATUS_INVALID_PARAMETER;
390 }
391
392 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
393 if (idx == 1) {
394 /*
395 * the 1st request should never have the
396 * SMB2_HDR_FLAG_CHAINED flag set
397 */
398 if (flags & SMB2_HDR_FLAG_CHAINED) {
399 req->next_status = NT_STATUS_INVALID_PARAMETER;
400 return NT_STATUS_OK;
401 }
402 } else if (idx == 4) {
403 /*
404 * the 2nd request triggers related vs. unrelated
405 * compounded requests
406 */
407 if (flags & SMB2_HDR_FLAG_CHAINED) {
408 compound_related = true;
409 }
410 } else if (idx > 4) {
411 #if 0
412 /*
413 * It seems the this tests are wrong
414 * see the SMB2-COMPOUND test
415 */
416
417 /*
418 * all other requests should match the 2nd one
419 */
420 if (flags & SMB2_HDR_FLAG_CHAINED) {
421 if (!compound_related) {
422 req->next_status =
423 NT_STATUS_INVALID_PARAMETER;
424 return NT_STATUS_OK;
425 }
426 } else {
427 if (compound_related) {
428 req->next_status =
429 NT_STATUS_INVALID_PARAMETER;
430 return NT_STATUS_OK;
431 }
432 }
433 #endif
434 }
435 }
436
437 return NT_STATUS_OK;
438 }
439
440 static void smb2_set_operation_credit(struct smbd_server_connection *sconn,
441 const struct iovec *in_vector,
442 struct iovec *out_vector)
443 {
444 uint8_t *outhdr = (uint8_t *)out_vector->iov_base;
445 uint16_t credits_requested = 0;
446 uint16_t credits_granted = 0;
447
448 if (in_vector != NULL) {
449 const uint8_t *inhdr = (const uint8_t *)in_vector->iov_base;
450 credits_requested = SVAL(inhdr, SMB2_HDR_CREDIT);
451 }
452
453 SMB_ASSERT(sconn->smb2.max_credits >= sconn->smb2.credits_granted);
454
455 /* Remember what we gave out. */
456 credits_granted = MIN(credits_requested, (sconn->smb2.max_credits -
457 sconn->smb2.credits_granted));
458
459 if (credits_granted == 0 && sconn->smb2.credits_granted == 0) {
460 /* First negprot packet, or ensure the client credits can
461 never drop to zero. */
462 credits_granted = 1;
463 }
464
465 SSVAL(outhdr, SMB2_HDR_CREDIT, credits_granted);
466 sconn->smb2.credits_granted += credits_granted;
467
468 DEBUG(10,("smb2_set_operation_credit: requested %u, "
469 "granted %u, total granted %u\n",
470 (unsigned int)credits_requested,
471 (unsigned int)credits_granted,
472 (unsigned int)sconn->smb2.credits_granted ));
473 }
474
475 static void smb2_calculate_credits(const struct smbd_smb2_request *inreq,
476 struct smbd_smb2_request *outreq)
477 {
478 int count, idx;
479
480 count = outreq->out.vector_count;
481
482 for (idx=1; idx < count; idx += 3) {
483 smb2_set_operation_credit(outreq->sconn,
484 &inreq->in.vector[idx],
485 &outreq->out.vector[idx]);
486 }
487 }
488
489 static NTSTATUS smbd_smb2_request_setup_out(struct smbd_smb2_request *req)
490 {
491 struct iovec *vector;
492 int count;
493 int idx;
494
495 count = req->in.vector_count;
496 vector = talloc_zero_array(req, struct iovec, count);
497 if (vector == NULL) {
498 return NT_STATUS_NO_MEMORY;
499 }
500
501 vector[0].iov_base = req->out.nbt_hdr;
502 vector[0].iov_len = 4;
503 SIVAL(req->out.nbt_hdr, 0, 0);
504
505 for (idx=1; idx < count; idx += 3) {
506 const uint8_t *inhdr = NULL;
507 uint32_t in_flags;
508 uint8_t *outhdr = NULL;
509 uint8_t *outbody = NULL;
510 uint32_t next_command_ofs = 0;
511 struct iovec *current = &vector[idx];
512
513 if ((idx + 3) < count) {
514 /* we have a next command -
515 * setup for the error case. */
516 next_command_ofs = SMB2_HDR_BODY + 9;
517 }
518
519 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
520 in_flags = IVAL(inhdr, SMB2_HDR_FLAGS);
521
522 outhdr = talloc_zero_array(vector, uint8_t,
523 OUTVEC_ALLOC_SIZE);
524 if (outhdr == NULL) {
525 return NT_STATUS_NO_MEMORY;
526 }
527
528 outbody = outhdr + SMB2_HDR_BODY;
529
530 current[0].iov_base = (void *)outhdr;
531 current[0].iov_len = SMB2_HDR_BODY;
532
533 current[1].iov_base = (void *)outbody;
534 current[1].iov_len = 8;
535
536 current[2].iov_base = NULL;
537 current[2].iov_len = 0;
538
539 /* setup the SMB2 header */
540 SIVAL(outhdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
541 SSVAL(outhdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
542 SSVAL(outhdr, SMB2_HDR_EPOCH, 0);
543 SIVAL(outhdr, SMB2_HDR_STATUS,
544 NT_STATUS_V(NT_STATUS_INTERNAL_ERROR));
545 SSVAL(outhdr, SMB2_HDR_OPCODE,
546 SVAL(inhdr, SMB2_HDR_OPCODE));
547 SIVAL(outhdr, SMB2_HDR_FLAGS,
548 IVAL(inhdr, SMB2_HDR_FLAGS) | SMB2_HDR_FLAG_REDIRECT);
549 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
550 SBVAL(outhdr, SMB2_HDR_MESSAGE_ID,
551 BVAL(inhdr, SMB2_HDR_MESSAGE_ID));
552 SIVAL(outhdr, SMB2_HDR_PID,
553 IVAL(inhdr, SMB2_HDR_PID));
554 SIVAL(outhdr, SMB2_HDR_TID,
555 IVAL(inhdr, SMB2_HDR_TID));
556 SBVAL(outhdr, SMB2_HDR_SESSION_ID,
557 BVAL(inhdr, SMB2_HDR_SESSION_ID));
558 memset(outhdr + SMB2_HDR_SIGNATURE, 0, 16);
559
560 /* setup error body header */
561 SSVAL(outbody, 0x00, 0x08 + 1);
562 SSVAL(outbody, 0x02, 0);
563 SIVAL(outbody, 0x04, 0);
564 }
565
566 req->out.vector = vector;
567 req->out.vector_count = count;
568
569 /* setup the length of the NBT packet */
570 smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
571
572 DLIST_ADD_END(req->sconn->smb2.requests, req, struct smbd_smb2_request *);
573
574 return NT_STATUS_OK;
575 }
576
577 void smbd_server_connection_terminate_ex(struct smbd_server_connection *sconn,
578 const char *reason,
579 const char *location)
580 {
581 DEBUG(10,("smbd_server_connection_terminate_ex: reason[%s] at %s\n",
582 reason, location));
583 exit_server_cleanly(reason);
584 }
585
586 static bool dup_smb2_vec3(TALLOC_CTX *ctx,
587 struct iovec *outvec,
588 const struct iovec *srcvec)
589 {
590 /* vec[0] is always boilerplate and must
591 * be allocated with size OUTVEC_ALLOC_SIZE. */
592
593 outvec[0].iov_base = talloc_memdup(ctx,
594 srcvec[0].iov_base,
595 OUTVEC_ALLOC_SIZE);
596 if (!outvec[0].iov_base) {
597 return false;
598 }
599 outvec[0].iov_len = SMB2_HDR_BODY;
600
601 /*
602 * If this is a "standard" vec[1] of length 8,
603 * pointing to srcvec[0].iov_base + SMB2_HDR_BODY,
604 * then duplicate this. Else use talloc_memdup().
605 */
606
607 if (srcvec[1].iov_len == 8 &&
608 srcvec[1].iov_base ==
609 ((uint8_t *)srcvec[0].iov_base) +
610 SMB2_HDR_BODY) {
611 outvec[1].iov_base = ((uint8_t *)outvec[0].iov_base) +
612 SMB2_HDR_BODY;
613 outvec[1].iov_len = 8;
614 } else {
615 outvec[1].iov_base = talloc_memdup(ctx,
616 srcvec[1].iov_base,
617 srcvec[1].iov_len);
618 if (!outvec[1].iov_base) {
619 return false;
620 }
621 outvec[1].iov_len = srcvec[1].iov_len;
622 }
623
624 /*
625 * If this is a "standard" vec[2] of length 1,
626 * pointing to srcvec[0].iov_base + (OUTVEC_ALLOC_SIZE - 1)
627 * then duplicate this. Else use talloc_memdup().
628 */
629
630 if (srcvec[2].iov_base &&
631 srcvec[2].iov_len) {
632 if (srcvec[2].iov_base ==
633 ((uint8_t *)srcvec[0].iov_base) +
634 (OUTVEC_ALLOC_SIZE - 1) &&
635 srcvec[2].iov_len == 1) {
636 /* Common SMB2 error packet case. */
637 outvec[2].iov_base = ((uint8_t *)outvec[0].iov_base) +
638 (OUTVEC_ALLOC_SIZE - 1);
639 } else {
640 outvec[2].iov_base = talloc_memdup(ctx,
641 srcvec[2].iov_base,
642 srcvec[2].iov_len);
643 if (!outvec[2].iov_base) {
644 return false;
645 }
646 }
647 outvec[2].iov_len = srcvec[2].iov_len;
648 } else {
649 outvec[2].iov_base = NULL;
650 outvec[2].iov_len = 0;
651 }
652 return true;
653 }
654
655 static struct smbd_smb2_request *dup_smb2_req(const struct smbd_smb2_request *req)
656 {
657 struct smbd_smb2_request *newreq = NULL;
658 struct iovec *outvec = NULL;
659 int count = req->out.vector_count;
660 int i;
661
662 newreq = smbd_smb2_request_allocate(req->sconn);
663 if (!newreq) {
664 return NULL;
665 }
666
667 newreq->sconn = req->sconn;
668 newreq->session = req->session;
669 newreq->do_signing = req->do_signing;
670 newreq->current_idx = req->current_idx;
671 newreq->async = false;
672 newreq->cancelled = false;
673 /* Note we are leaving:
674 ->tcon
675 ->smb1req
676 ->compat_chain_fsp
677 uninitialized as NULL here as
678 they're not used in the interim
679 response code. JRA. */
680
681 outvec = talloc_zero_array(newreq, struct iovec, count);
682 if (!outvec) {
683 TALLOC_FREE(newreq);
684 return NULL;
685 }
686 newreq->out.vector = outvec;
687 newreq->out.vector_count = count;
688
689 /* Setup the outvec's identically to req. */
690 outvec[0].iov_base = newreq->out.nbt_hdr;
691 outvec[0].iov_len = 4;
692 memcpy(newreq->out.nbt_hdr, req->out.nbt_hdr, 4);
693
694 /* Setup the vectors identically to the ones in req. */
695 for (i = 1; i < count; i += 3) {
696 if (!dup_smb2_vec3(outvec, &outvec[i], &req->out.vector[i])) {
697 break;
698 }
699 }
700
701 if (i < count) {
702 /* Alloc failed. */
703 TALLOC_FREE(newreq);
704 return NULL;
705 }
706
707 smb2_setup_nbt_length(newreq->out.vector,
708 newreq->out.vector_count);
709
710 return newreq;
711 }
712
713 static void smbd_smb2_request_writev_done(struct tevent_req *subreq);
714
715 static NTSTATUS smb2_send_async_interim_response(const struct smbd_smb2_request *req)
716 {
717 int i = 0;
718 uint8_t *outhdr = NULL;
719 struct smbd_smb2_request *nreq = NULL;
720
721 /* Create a new smb2 request we'll use
722 for the interim return. */
723 nreq = dup_smb2_req(req);
724 if (!nreq) {
725 return NT_STATUS_NO_MEMORY;
726 }
727
728 /* Lose the last 3 out vectors. They're the
729 ones we'll be using for the async reply. */
730 nreq->out.vector_count -= 3;
731
732 smb2_setup_nbt_length(nreq->out.vector,
733 nreq->out.vector_count);
734
735 /* Step back to the previous reply. */
736 i = nreq->current_idx - 3;
737 outhdr = (uint8_t *)nreq->out.vector[i].iov_base;
738 /* And end the chain. */
739 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, 0);
740
741 /* Calculate outgoing credits */
742 smb2_calculate_credits(req, nreq);
743
744 /* Re-sign if needed. */
745 if (nreq->do_signing) {
746 NTSTATUS status;
747 status = smb2_signing_sign_pdu(nreq->session->session_key,
748 &nreq->out.vector[i], 3);
749 if (!NT_STATUS_IS_OK(status)) {
750 return status;
751 }
752 }
753 if (DEBUGLEVEL >= 10) {
754 dbgtext("smb2_send_async_interim_response: nreq->current_idx = %u\n",
755 (unsigned int)nreq->current_idx );
756 dbgtext("smb2_send_async_interim_response: returning %u vectors\n",
757 (unsigned int)nreq->out.vector_count );
758 print_req_vectors(nreq);
759 }
760 nreq->subreq = tstream_writev_queue_send(nreq,
761 nreq->sconn->smb2.event_ctx,
762 nreq->sconn->smb2.stream,
763 nreq->sconn->smb2.send_queue,
764 nreq->out.vector,
765 nreq->out.vector_count);
766
767 if (nreq->subreq == NULL) {
768 return NT_STATUS_NO_MEMORY;
769 }
770
771 tevent_req_set_callback(nreq->subreq,
772 smbd_smb2_request_writev_done,
773 nreq);
774
775 return NT_STATUS_OK;
776 }
777
778 struct smbd_smb2_request_pending_state {
779 struct smbd_server_connection *sconn;
780 uint8_t buf[4 + SMB2_HDR_BODY + 0x08 + 1];
781 struct iovec vector[3];
782 };
783
784 static void smbd_smb2_request_pending_writev_done(struct tevent_req *subreq)
785 {
786 struct smbd_smb2_request_pending_state *state =
787 tevent_req_callback_data(subreq,
788 struct smbd_smb2_request_pending_state);
789 struct smbd_server_connection *sconn = state->sconn;
790 int ret;
791 int sys_errno;
792
793 ret = tstream_writev_queue_recv(subreq, &sys_errno);
794 TALLOC_FREE(subreq);
795 if (ret == -1) {
796 NTSTATUS status = map_nt_error_from_unix(sys_errno);
797 smbd_server_connection_terminate(sconn, nt_errstr(status));
798 return;
799 }
800
801 TALLOC_FREE(state);
802 }
803
804 NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req,
805 struct tevent_req *subreq)
806 {
807 NTSTATUS status;
808 struct smbd_smb2_request_pending_state *state = NULL;
809 int i = req->current_idx;
810 uint8_t *reqhdr = NULL;
811 uint8_t *hdr = NULL;
812 uint8_t *body = NULL;
813 uint32_t flags = 0;
814 uint64_t message_id = 0;
815 uint64_t async_id = 0;
816 struct iovec *outvec = NULL;
817
818 if (!tevent_req_is_in_progress(subreq)) {
819 return NT_STATUS_OK;
820 }
821
822 req->subreq = subreq;
823 subreq = NULL;
824
825 if (req->async) {
826 /* We're already async. */
827 return NT_STATUS_OK;
828 }
829
830 if (req->in.vector_count > i + 3) {
831 /*
832 * We're trying to go async in a compound
833 * request chain. This is not allowed.
834 * Cancel the outstanding request.
835 */
836 tevent_req_cancel(req->subreq);
837 return smbd_smb2_request_error(req,
838 NT_STATUS_INSUFFICIENT_RESOURCES);
839 }
840
841 if (DEBUGLEVEL >= 10) {
842 dbgtext("smbd_smb2_request_pending_queue: req->current_idx = %u\n",
843 (unsigned int)req->current_idx );
844 print_req_vectors(req);
845 }
846
847 if (req->out.vector_count > 4) {
848 /* This is a compound reply. We
849 * must do an interim response
850 * followed by the async response
851 * to match W2K8R2.
852 */
853 status = smb2_send_async_interim_response(req);
854 if (!NT_STATUS_IS_OK(status)) {
855 return status;
856 }
857 }
858
859 /* Don't return an intermediate packet on a pipe read/write. */
860 if (req->tcon && req->tcon->compat_conn && IS_IPC(req->tcon->compat_conn)) {
861 return NT_STATUS_OK;
862 }
863
864 reqhdr = (uint8_t *)req->out.vector[i].iov_base;
865 flags = (IVAL(reqhdr, SMB2_HDR_FLAGS) & ~SMB2_HDR_FLAG_CHAINED);
866 message_id = BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
867 async_id = message_id; /* keep it simple for now... */
868
869 /*
870 * What we send is identical to a smbd_smb2_request_error
871 * packet with an error status of STATUS_PENDING. Make use
872 * of this fact sometime when refactoring. JRA.
873 */
874
875 state = talloc_zero(req->sconn, struct smbd_smb2_request_pending_state);
876 if (state == NULL) {
877 return NT_STATUS_NO_MEMORY;
878 }
879 state->sconn = req->sconn;
880
881 state->vector[0].iov_base = (void *)state->buf;
882 state->vector[0].iov_len = 4;
883
884 state->vector[1].iov_base = state->buf + 4;
885 state->vector[1].iov_len = SMB2_HDR_BODY;
886
887 state->vector[2].iov_base = state->buf + 4 + SMB2_HDR_BODY;
888 state->vector[2].iov_len = 9;
889
890 smb2_setup_nbt_length(state->vector, 3);
891
892 hdr = (uint8_t *)state->vector[1].iov_base;
893 body = (uint8_t *)state->vector[2].iov_base;
894
895 SIVAL(hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
896 SSVAL(hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
897 SSVAL(hdr, SMB2_HDR_EPOCH, 0);
898 SIVAL(hdr, SMB2_HDR_STATUS, NT_STATUS_V(STATUS_PENDING));
899 SSVAL(hdr, SMB2_HDR_OPCODE, SVAL(reqhdr, SMB2_HDR_OPCODE));
900
901 SIVAL(hdr, SMB2_HDR_FLAGS, flags | SMB2_HDR_FLAG_ASYNC);
902 SIVAL(hdr, SMB2_HDR_NEXT_COMMAND, 0);
903 SBVAL(hdr, SMB2_HDR_MESSAGE_ID, message_id);
904 SBVAL(hdr, SMB2_HDR_PID, async_id);
905 SBVAL(hdr, SMB2_HDR_SESSION_ID,
906 BVAL(reqhdr, SMB2_HDR_SESSION_ID));
907 memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
908
909 SSVAL(body, 0x00, 0x08 + 1);
910
911 SCVAL(body, 0x02, 0);
912 SCVAL(body, 0x03, 0);
913 SIVAL(body, 0x04, 0);
914 /* Match W2K8R2... */
915 SCVAL(body, 0x08, 0x21);
916
917 /* Ensure we correctly go through crediting. Grant
918 the credits now, and zero credits on the final
919 response. */
920 smb2_set_operation_credit(req->sconn,
921 &req->in.vector[i],
922 &state->vector[1]);
923
924 if (req->do_signing) {
925 status = smb2_signing_sign_pdu(req->session->session_key,
926 state->vector, 3);
927 if (!NT_STATUS_IS_OK(status)) {
928 return status;
929 }
930 }
931
932 subreq = tstream_writev_queue_send(state,
933 req->sconn->smb2.event_ctx,
934 req->sconn->smb2.stream,
935 req->sconn->smb2.send_queue,
936 state->vector,
937 3);
938
939 if (subreq == NULL) {
940 return NT_STATUS_NO_MEMORY;
941 }
942
943 tevent_req_set_callback(subreq,
944 smbd_smb2_request_pending_writev_done,
945 state);
946
947 /* Note we're going async with this request. */
948 req->async = true;
949
950 /*
951 * Now manipulate req so that the outstanding async request
952 * is the only one left in the struct smbd_smb2_request.
953 */
954
955 if (req->current_idx == 1) {
956 /* There was only one. */
957 goto out;
958 }
959
960 /* Re-arrange the in.vectors. */
961 req->in.vector[1] = req->in.vector[i];
962 req->in.vector[2] = req->in.vector[i+1];
963 req->in.vector[3] = req->in.vector[i+2];
964 req->in.vector_count = 4;
965 /* Reset the new in size. */
966 smb2_setup_nbt_length(req->in.vector, 4);
967
968 /* Now recreate the out.vectors. */
969 outvec = talloc_zero_array(req, struct iovec, 4);
970 if (!outvec) {
971 return NT_STATUS_NO_MEMORY;
972 }
973
974 /* 0 is always boilerplate and must
975 * be of size 4 for the length field. */
976
977 outvec[0].iov_base = req->out.nbt_hdr;
978 outvec[0].iov_len = 4;
979 SIVAL(req->out.nbt_hdr, 0, 0);
980
981 if (!dup_smb2_vec3(outvec, &outvec[1], &req->out.vector[i])) {
982 return NT_STATUS_NO_MEMORY;
983 }
984
985 TALLOC_FREE(req->out.vector);
986
987 req->out.vector = outvec;
988
989 req->current_idx = 1;
990 req->out.vector_count = 4;
991
992 out:
993
994 smb2_setup_nbt_length(req->out.vector,
995 req->out.vector_count);
996
997 /* Ensure our final reply matches the interim one. */
998 reqhdr = (uint8_t *)req->out.vector[1].iov_base;
999 SIVAL(reqhdr, SMB2_HDR_FLAGS, flags | SMB2_HDR_FLAG_ASYNC);
1000 SBVAL(reqhdr, SMB2_HDR_PID, async_id);
1001
1002 {
1003 const uint8_t *inhdr =
1004 (const uint8_t *)req->in.vector[1].iov_base;
1005 DEBUG(10,("smbd_smb2_request_pending_queue: opcode[%s] mid %llu "
1006 "going async\n",
1007 smb2_opcode_name((uint16_t)IVAL(inhdr, SMB2_HDR_OPCODE)),
1008 (unsigned long long)async_id ));
1009 }
1010 return NT_STATUS_OK;
1011 }
1012
1013 static NTSTATUS smbd_smb2_request_process_cancel(struct smbd_smb2_request *req)
1014 {
1015 struct smbd_server_connection *sconn = req->sconn;
1016 struct smbd_smb2_request *cur;
1017 const uint8_t *inhdr;
1018 int i = req->current_idx;
1019 uint32_t flags;
1020 uint64_t search_message_id;
1021 uint64_t search_async_id;
1022 uint64_t found_id;
1023
1024 inhdr = (const uint8_t *)req->in.vector[i].iov_base;
1025
1026 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
1027 search_message_id = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
1028 search_async_id = BVAL(inhdr, SMB2_HDR_PID);
1029
1030 /*
1031 * we don't need the request anymore
1032 * cancel requests never have a response
1033 */
1034 DLIST_REMOVE(req->sconn->smb2.requests, req);
1035 TALLOC_FREE(req);
1036
1037 for (cur = sconn->smb2.requests; cur; cur = cur->next) {
1038 const uint8_t *outhdr;
1039 uint64_t message_id;
1040 uint64_t async_id;
1041
1042 i = cur->current_idx;
1043
1044 outhdr = (const uint8_t *)cur->out.vector[i].iov_base;
1045
1046 message_id = BVAL(outhdr, SMB2_HDR_MESSAGE_ID);
1047 async_id = BVAL(outhdr, SMB2_HDR_PID);
1048
1049 if (flags & SMB2_HDR_FLAG_ASYNC) {
1050 if (search_async_id == async_id) {
1051 found_id = async_id;
1052 break;
1053 }
1054 } else {
1055 if (search_message_id == message_id) {
1056 found_id = message_id;
1057 break;
1058 }
1059 }
1060 }
1061
1062 if (cur && cur->subreq) {
1063 inhdr = (const uint8_t *)cur->in.vector[i].iov_base;
1064 DEBUG(10,("smbd_smb2_request_process_cancel: attempting to "
1065 "cancel opcode[%s] mid %llu\n",
1066 smb2_opcode_name((uint16_t)IVAL(inhdr, SMB2_HDR_OPCODE)),
1067 (unsigned long long)found_id ));
1068 tevent_req_cancel(cur->subreq);
1069 }
1070
1071 return NT_STATUS_OK;
1072 }
1073
1074 NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req)
1075 {
1076 const uint8_t *inhdr;
1077 int i = req->current_idx;
1078 uint16_t opcode;
1079 uint32_t flags;
1080 uint64_t mid;
1081 NTSTATUS status;
1082 NTSTATUS session_status;
1083 uint32_t allowed_flags;
1084 NTSTATUS return_value;
1085
1086 inhdr = (const uint8_t *)req->in.vector[i].iov_base;
1087
1088 /* TODO: verify more things */
1089
1090 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
1091 opcode = IVAL(inhdr, SMB2_HDR_OPCODE);
1092 mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
1093 DEBUG(10,("smbd_smb2_request_dispatch: opcode[%s] mid = %llu\n",
1094 smb2_opcode_name(opcode),
1095 (unsigned long long)mid));
1096
1097 allowed_flags = SMB2_HDR_FLAG_CHAINED |
1098 SMB2_HDR_FLAG_SIGNED |
1099 SMB2_HDR_FLAG_DFS;
1100 if (opcode == SMB2_OP_CANCEL) {
1101 allowed_flags |= SMB2_HDR_FLAG_ASYNC;
1102 }
1103 if ((flags & ~allowed_flags) != 0) {
1104 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
1105 }
1106
1107 session_status = smbd_smb2_request_check_session(req);
1108
1109 req->do_signing = false;
1110 if (flags & SMB2_HDR_FLAG_SIGNED) {
1111 if (!NT_STATUS_IS_OK(session_status)) {
1112 return smbd_smb2_request_error(req, session_status);
1113 }
1114
1115 req->do_signing = true;
1116 status = smb2_signing_check_pdu(req->session->session_key,
1117 &req->in.vector[i], 3);
1118 if (!NT_STATUS_IS_OK(status)) {
1119 return smbd_smb2_request_error(req, status);
1120 }
1121 } else if (req->session && req->session->do_signing) {
1122 return smbd_smb2_request_error(req, NT_STATUS_ACCESS_DENIED);
1123 }
1124
1125 if (flags & SMB2_HDR_FLAG_CHAINED) {
1126 /*
1127 * This check is mostly for giving the correct error code
1128 * for compounded requests.
1129 *
1130 * TODO: we may need to move this after the session
1131 * and tcon checks.
1132 */
1133 if (!NT_STATUS_IS_OK(req->next_status)) {
1134 return smbd_smb2_request_error(req, req->next_status);
1135 }
1136 } else {
1137 req->compat_chain_fsp = NULL;
1138 }
1139
1140 switch (opcode) {
1141 case SMB2_OP_NEGPROT:
1142 {
1143 START_PROFILE(smb2_negprot);
1144 return_value = smbd_smb2_request_process_negprot(req);
1145 END_PROFILE(smb2_negprot);
1146 }
1147 break;
1148
1149 case SMB2_OP_SESSSETUP:
1150 {
1151 START_PROFILE(smb2_sesssetup);
1152 return_value = smbd_smb2_request_process_sesssetup(req);
1153 END_PROFILE(smb2_sesssetup);
1154 }
1155 break;
1156
1157 case SMB2_OP_LOGOFF:
1158 if (!NT_STATUS_IS_OK(session_status)) {
1159 return_value = smbd_smb2_request_error(req, session_status);
1160 break;
1161 }
1162
1163 {
1164 START_PROFILE(smb2_logoff);
1165 return_value = smbd_smb2_request_process_logoff(req);
1166 END_PROFILE(smb2_logoff);
1167 }
1168 break;
1169
1170 case SMB2_OP_TCON:
1171 if (!NT_STATUS_IS_OK(session_status)) {
1172 return_value = smbd_smb2_request_error(req, session_status);
1173 break;
1174 }
1175 status = smbd_smb2_request_check_session(req);
1176 if (!NT_STATUS_IS_OK(status)) {
1177 return_value = smbd_smb2_request_error(req, status);
1178 break;
1179 }
1180
1181 {
1182 START_PROFILE(smb2_tcon);
1183 return_value = smbd_smb2_request_process_tcon(req);
1184 END_PROFILE(smb2_tcon);
1185 }
1186 break;
1187
1188 case SMB2_OP_TDIS:
1189 if (!NT_STATUS_IS_OK(session_status)) {
1190 return_value = smbd_smb2_request_error(req, session_status);
1191 break;
1192 }
1193 status = smbd_smb2_request_check_tcon(req);
1194 if (!NT_STATUS_IS_OK(status)) {
1195 return_value = smbd_smb2_request_error(req, status);
1196 break;
1197 }
1198
1199 {
1200 START_PROFILE(smb2_tdis);
1201 return_value = smbd_smb2_request_process_tdis(req);
1202 END_PROFILE(smb2_tdis);
1203 }
1204 break;
1205
1206 case SMB2_OP_CREATE:
1207 if (!NT_STATUS_IS_OK(session_status)) {
1208 return_value = smbd_smb2_request_error(req, session_status);
1209 break;
1210 }
1211 status = smbd_smb2_request_check_tcon(req);
1212 if (!NT_STATUS_IS_OK(status)) {
1213 return_value = smbd_smb2_request_error(req, status);
1214 break;
1215 }
1216
1217 {
1218 START_PROFILE(smb2_create);
1219 return_value = smbd_smb2_request_process_create(req);
1220 END_PROFILE(smb2_create);
1221 }
1222 break;
1223
1224 case SMB2_OP_CLOSE:
1225 if (!NT_STATUS_IS_OK(session_status)) {
1226 return_value = smbd_smb2_request_error(req, session_status);
1227 break;
1228 }
1229 status = smbd_smb2_request_check_tcon(req);
1230 if (!NT_STATUS_IS_OK(status)) {
1231 return_value = smbd_smb2_request_error(req, status);
1232 break;
1233 }
1234
1235 {
1236 START_PROFILE(smb2_close);
1237 return_value = smbd_smb2_request_process_close(req);
1238 END_PROFILE(smb2_close);
1239 }
1240 break;
1241
1242 case SMB2_OP_FLUSH:
1243 if (!NT_STATUS_IS_OK(session_status)) {
1244 return_value = smbd_smb2_request_error(req, session_status);
1245 break;
1246 }
1247 status = smbd_smb2_request_check_tcon(req);
1248 if (!NT_STATUS_IS_OK(status)) {
1249 return_value = smbd_smb2_request_error(req, status);
1250 break;
1251 }
1252
1253 {
1254 START_PROFILE(smb2_flush);
1255 return_value = smbd_smb2_request_process_flush(req);
1256 END_PROFILE(smb2_flush);
1257 }
1258 break;
1259
1260 case SMB2_OP_READ:
1261 if (!NT_STATUS_IS_OK(session_status)) {
1262 return_value = smbd_smb2_request_error(req, session_status);
1263 break;
1264 }
1265 status = smbd_smb2_request_check_tcon(req);
1266 if (!NT_STATUS_IS_OK(status)) {
1267 return_value = smbd_smb2_request_error(req, status);
1268 break;
1269 }
1270
1271 {
1272 START_PROFILE(smb2_read);
1273 return_value = smbd_smb2_request_process_read(req);
1274 END_PROFILE(smb2_read);
1275 }
1276 break;
1277
1278 case SMB2_OP_WRITE:
1279 if (!NT_STATUS_IS_OK(session_status)) {
1280 return_value = smbd_smb2_request_error(req, session_status);
1281 break;
1282 }
1283 status = smbd_smb2_request_check_tcon(req);
1284 if (!NT_STATUS_IS_OK(status)) {
1285 return_value = smbd_smb2_request_error(req, status);
1286 break;
1287 }
1288
1289 {
1290 START_PROFILE(smb2_write);
1291 return_value = smbd_smb2_request_process_write(req);
1292 END_PROFILE(smb2_write);
1293 }
1294 break;
1295
1296 case SMB2_OP_LOCK:
1297 if (!NT_STATUS_IS_OK(session_status)) {
1298 /* Too ugly to live ? JRA. */
1299 if (NT_STATUS_EQUAL(session_status,NT_STATUS_USER_SESSION_DELETED)) {
1300 session_status = NT_STATUS_FILE_CLOSED;
1301 }
1302 return_value = smbd_smb2_request_error(req, session_status);
1303 break;
1304 }
1305 status = smbd_smb2_request_check_tcon(req);
1306 if (!NT_STATUS_IS_OK(status)) {
1307 /* Too ugly to live ? JRA. */
1308 if (NT_STATUS_EQUAL(status,NT_STATUS_NETWORK_NAME_DELETED)) {
1309 status = NT_STATUS_FILE_CLOSED;
1310 }
1311 return_value = smbd_smb2_request_error(req, status);
1312 break;
1313 }
1314
1315 {
1316 START_PROFILE(smb2_lock);
1317 return_value = smbd_smb2_request_process_lock(req);
1318 END_PROFILE(smb2_lock);
1319 }
1320 break;
1321
1322 case SMB2_OP_IOCTL:
1323 if (!NT_STATUS_IS_OK(session_status)) {
1324 return_value = smbd_smb2_request_error(req, session_status);
1325 break;
1326 }
1327 status = smbd_smb2_request_check_tcon(req);
1328 if (!NT_STATUS_IS_OK(status)) {
1329 return_value = smbd_smb2_request_error(req, status);
1330 break;
1331 }
1332
1333 {
1334 START_PROFILE(smb2_ioctl);
1335 return_value = smbd_smb2_request_process_ioctl(req);
1336 END_PROFILE(smb2_ioctl);
1337 }
1338 break;
1339
1340 case SMB2_OP_CANCEL:
1341 {
1342 START_PROFILE(smb2_cancel);
1343 return_value = smbd_smb2_request_process_cancel(req);
1344 END_PROFILE(smb2_cancel);
1345 }
1346 break;
1347
1348 case SMB2_OP_KEEPALIVE:
1349 {START_PROFILE(smb2_keepalive);
1350 return_value = smbd_smb2_request_process_keepalive(req);
1351 END_PROFILE(smb2_keepalive);}
1352 break;
1353
1354 case SMB2_OP_FIND:
1355 if (!NT_STATUS_IS_OK(session_status)) {
1356 return_value = smbd_smb2_request_error(req, session_status);
1357 break;
1358 }
1359 status = smbd_smb2_request_check_tcon(req);
1360 if (!NT_STATUS_IS_OK(status)) {
1361 return_value = smbd_smb2_request_error(req, status);
1362 break;
1363 }
1364
1365 {
1366 START_PROFILE(smb2_find);
1367 return_value = smbd_smb2_request_process_find(req);
1368 END_PROFILE(smb2_find);
1369 }
1370 break;
1371
1372 case SMB2_OP_NOTIFY:
1373 if (!NT_STATUS_IS_OK(session_status)) {
1374 return_value = smbd_smb2_request_error(req, session_status);
1375 break;
1376 }
1377 status = smbd_smb2_request_check_tcon(req);
1378 if (!NT_STATUS_IS_OK(status)) {
1379 return_value = smbd_smb2_request_error(req, status);
1380 break;
1381 }
1382
1383 {
1384 START_PROFILE(smb2_notify);
1385 return_value = smbd_smb2_request_process_notify(req);
1386 END_PROFILE(smb2_notify);
1387 }
1388 break;
1389
1390 case SMB2_OP_GETINFO:
1391 if (!NT_STATUS_IS_OK(session_status)) {
1392 return_value = smbd_smb2_request_error(req, session_status);
1393 break;
1394 }
1395 status = smbd_smb2_request_check_tcon(req);
1396 if (!NT_STATUS_IS_OK(status)) {
1397 return_value = smbd_smb2_request_error(req, status);
1398 break;
1399 }
1400
1401 {
1402 START_PROFILE(smb2_getinfo);
1403 return_value = smbd_smb2_request_process_getinfo(req);
1404 END_PROFILE(smb2_getinfo);
1405 }
1406 break;
1407
1408 case SMB2_OP_SETINFO:
1409 if (!NT_STATUS_IS_OK(session_status)) {
1410 return_value = smbd_smb2_request_error(req, session_status);
1411 break;
1412 }
1413 status = smbd_smb2_request_check_tcon(req);
1414 if (!NT_STATUS_IS_OK(status)) {
1415 return_value = smbd_smb2_request_error(req, status);
1416 break;
1417 }
1418
1419 {
1420 START_PROFILE(smb2_setinfo);
1421 return_value = smbd_smb2_request_process_setinfo(req);
1422 END_PROFILE(smb2_setinfo);
1423 }
1424 break;
1425
1426 case SMB2_OP_BREAK:
1427 if (!NT_STATUS_IS_OK(session_status)) {
1428 return_value = smbd_smb2_request_error(req, session_status);
1429 break;
1430 }
1431 status = smbd_smb2_request_check_tcon(req);
1432 if (!NT_STATUS_IS_OK(status)) {
1433 return_value = smbd_smb2_request_error(req, status);
1434 break;
1435 }
1436
1437 {
1438 START_PROFILE(smb2_break);
1439 return_value = smbd_smb2_request_process_break(req);
1440 END_PROFILE(smb2_break);
1441 }
1442 break;
1443
1444 default:
1445 return_value = smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
1446 break;
1447 }
1448 return return_value;
1449 }
1450
1451 static NTSTATUS smbd_smb2_request_reply(struct smbd_smb2_request *req)
1452 {
1453 struct tevent_req *subreq;
1454 int i = req->current_idx;
1455
1456 req->subreq = NULL;
1457
1458 req->current_idx += 3;
1459
1460 if (req->current_idx < req->out.vector_count) {
1461 /*
1462 * We must process the remaining compound
1463 * SMB2 requests before any new incoming SMB2
1464 * requests. This is because incoming SMB2
1465 * requests may include a cancel for a
1466 * compound request we haven't processed
1467 * yet.
1468 */
1469 struct tevent_immediate *im = tevent_create_immediate(req);
1470 if (!im) {
1471 return NT_STATUS_NO_MEMORY;
1472 }
1473 tevent_schedule_immediate(im,
1474 req->sconn->smb2.event_ctx,
1475 smbd_smb2_request_dispatch_immediate,
1476 req);
1477 return NT_STATUS_OK;
1478 }
1479
1480 smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
1481
1482 /* Set credit for this operation (zero credits if this
1483 is a final reply for an async operation). */
1484 smb2_set_operation_credit(req->sconn,
1485 req->async ? NULL : &req->in.vector[i],
1486 &req->out.vector[i]);
1487
1488 if (req->do_signing) {
1489 NTSTATUS status;
1490 status = smb2_signing_sign_pdu(req->session->session_key,
1491 &req->out.vector[i], 3);
1492 if (!NT_STATUS_IS_OK(status)) {
1493 return status;
1494 }
1495 }
1496
1497 if (DEBUGLEVEL >= 10) {
1498 dbgtext("smbd_smb2_request_reply: sending...\n");
1499 print_req_vectors(req);
1500 }
1501
1502 /* I am a sick, sick man... :-). Sendfile hack ... JRA. */
1503 if (req->out.vector_count == 4 &&
1504 req->out.vector[3].iov_base == NULL &&
1505 req->out.vector[3].iov_len != 0) {
1506 /* Dynamic part is NULL. Chop it off,
1507 We're going to send it via sendfile. */
1508 req->out.vector_count -= 1;
1509 }
1510
1511 subreq = tstream_writev_queue_send(req,
1512 req->sconn->smb2.event_ctx,
1513 req->sconn->smb2.stream,
1514 req->sconn->smb2.send_queue,
1515 req->out.vector,
1516 req->out.vector_count);
1517 if (subreq == NULL) {
1518 return NT_STATUS_NO_MEMORY;
1519 }
1520 tevent_req_set_callback(subreq, smbd_smb2_request_writev_done, req);
1521 /*
1522 * We're done with this request -
1523 * move it off the "being processed" queue.
1524 */
1525 DLIST_REMOVE(req->sconn->smb2.requests, req);
1526
1527 return NT_STATUS_OK;
1528 }
1529
1530 void smbd_smb2_request_dispatch_immediate(struct tevent_context *ctx,
1531 struct tevent_immediate *im,
1532 void *private_data)
1533 {
1534 struct smbd_smb2_request *req = talloc_get_type_abort(private_data,
1535 struct smbd_smb2_request);
1536 struct smbd_server_connection *sconn = req->sconn;
1537 NTSTATUS status;
1538
1539 TALLOC_FREE(im);
1540
1541 if (DEBUGLEVEL >= 10) {
1542 DEBUG(10,("smbd_smb2_request_dispatch_immediate: idx[%d] of %d vectors\n",
1543 req->current_idx, req->in.vector_count));
1544 print_req_vectors(req);
1545 }
1546
1547 status = smbd_smb2_request_dispatch(req);
1548 if (!NT_STATUS_IS_OK(status)) {
1549 smbd_server_connection_terminate(sconn, nt_errstr(status));
1550 return;
1551 }
1552 }
1553
1554 static void smbd_smb2_request_writev_done(struct tevent_req *subreq)
1555 {
1556 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
1557 struct smbd_smb2_request);
1558 struct smbd_server_connection *sconn = req->sconn;
1559 int ret;
1560 int sys_errno;
1561
1562 ret = tstream_writev_queue_recv(subreq, &sys_errno);
1563 TALLOC_FREE(subreq);
1564 TALLOC_FREE(req);
1565 if (ret == -1) {
1566 NTSTATUS status = map_nt_error_from_unix(sys_errno);
1567 DEBUG(2,("smbd_smb2_request_writev_done: client write error %s\n",
1568 nt_errstr(status)));
1569 smbd_server_connection_terminate(sconn, nt_errstr(status));
1570 return;
1571 }
1572 }
1573
1574 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
1575 NTSTATUS status,
1576 DATA_BLOB body, DATA_BLOB *dyn,
1577 const char *location)
1578 {
1579 uint8_t *outhdr;
1580 int i = req->current_idx;
1581 uint32_t next_command_ofs;
1582
1583 DEBUG(10,("smbd_smb2_request_done_ex: "
1584 "idx[%d] status[%s] body[%u] dyn[%s:%u] at %s\n",
1585 i, nt_errstr(status), (unsigned int)body.length,
1586 dyn ? "yes": "no",
1587 (unsigned int)(dyn ? dyn->length : 0),
1588 location));
1589
1590 if (body.length < 2) {
1591 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
1592 }
1593
1594 if ((body.length % 2) != 0) {
1595 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
1596 }
1597
1598 outhdr = (uint8_t *)req->out.vector[i].iov_base;
1599
1600 next_command_ofs = IVAL(outhdr, SMB2_HDR_NEXT_COMMAND);
1601 SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
1602
1603 req->out.vector[i+1].iov_base = (void *)body.data;
1604 req->out.vector[i+1].iov_len = body.length;
1605
1606 if (dyn) {
1607 req->out.vector[i+2].iov_base = (void *)dyn->data;
1608 req->out.vector[i+2].iov_len = dyn->length;
1609 } else {
1610 req->out.vector[i+2].iov_base = NULL;
1611 req->out.vector[i+2].iov_len = 0;
1612 }
1613
1614 /* see if we need to recalculate the offset to the next response */
1615 if (next_command_ofs > 0) {
1616 next_command_ofs = SMB2_HDR_BODY;
1617 next_command_ofs += req->out.vector[i+1].iov_len;
1618 next_command_ofs += req->out.vector[i+2].iov_len;
1619 }
1620
1621 if ((next_command_ofs % 8) != 0) {
1622 size_t pad_size = 8 - (next_command_ofs % 8);
1623 if (req->out.vector[i+2].iov_len == 0) {
1624 /*
1625 * if the dyn buffer is empty
1626 * we can use it to add padding
1627 */
1628 uint8_t *pad;
1629
1630 pad = talloc_zero_array(req->out.vector,
1631 uint8_t, pad_size);
1632 if (pad == NULL) {
1633 return smbd_smb2_request_error(req,
1634 NT_STATUS_NO_MEMORY);
1635 }
1636
1637 req->out.vector[i+2].iov_base = (void *)pad;
1638 req->out.vector[i+2].iov_len = pad_size;
1639 } else {
1640 /*
1641 * For now we copy the dynamic buffer
1642 * and add the padding to the new buffer
1643 */
1644 size_t old_size;
1645 uint8_t *old_dyn;
1646 size_t new_size;
1647 uint8_t *new_dyn;
1648
1649 old_size = req->out.vector[i+2].iov_len;
1650 old_dyn = (uint8_t *)req->out.vector[i+2].iov_base;
1651
1652 new_size = old_size + pad_size;
1653 new_dyn = talloc_zero_array(req->out.vector,
1654 uint8_t, new_size);
1655 if (new_dyn == NULL) {
1656 return smbd_smb2_request_error(req,
1657 NT_STATUS_NO_MEMORY);
1658 }
1659
1660 memcpy(new_dyn, old_dyn, old_size);
1661 memset(new_dyn + old_size, 0, pad_size);
1662
1663 req->out.vector[i+2].iov_base = (void *)new_dyn;
1664 req->out.vector[i+2].iov_len = new_size;
1665 }
1666 next_command_ofs += pad_size;
1667 }
1668
1669 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
1670
1671 return smbd_smb2_request_reply(req);
1672 }
1673
1674 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
1675 NTSTATUS status,
1676 DATA_BLOB *info,
1677 const char *location)
1678 {
1679 DATA_BLOB body;
1680 int i = req->current_idx;
1681 uint8_t *outhdr = (uint8_t *)req->out.vector[i].iov_base;
1682
1683 DEBUG(10,("smbd_smb2_request_error_ex: idx[%d] status[%s] |%s| at %s\n",
1684 i, nt_errstr(status), info ? " +info" : "",
1685 location));
1686
1687 body.data = outhdr + SMB2_HDR_BODY;
1688 body.length = 8;
1689 SSVAL(body.data, 0, 9);
1690
1691 if (info) {
1692 SIVAL(body.data, 0x04, info->length);
1693 } else {
1694 /* Allocated size of req->out.vector[i].iov_base
1695 * *MUST BE* OUTVEC_ALLOC_SIZE. So we have room for
1696 * 1 byte without having to do an alloc.
1697 */
1698 info = talloc_zero_array(req->out.vector,
1699 DATA_BLOB,
1700 1);
1701 if (!info) {
1702 return NT_STATUS_NO_MEMORY;
1703 }
1704 info->data = ((uint8_t *)outhdr) +
1705 OUTVEC_ALLOC_SIZE - 1;
1706 info->length = 1;
1707 SCVAL(info->data, 0, 0);
1708 }
1709
1710 /*
1711 * if a request fails, all other remaining
1712 * compounded requests should fail too
1713 */
1714 req->next_status = NT_STATUS_INVALID_PARAMETER;
1715
1716 return smbd_smb2_request_done_ex(req, status, body, info, __location__);
1717 }
1718
1719
1720 struct smbd_smb2_send_oplock_break_state {
1721 struct smbd_server_connection *sconn;
1722 uint8_t buf[4 + SMB2_HDR_BODY + 0x18];
1723 struct iovec vector;
1724 };
1725
1726 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq);
1727
1728 NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
1729 uint64_t file_id_persistent,
1730 uint64_t file_id_volatile,
1731 uint8_t oplock_level)
1732 {
1733 struct smbd_smb2_send_oplock_break_state *state;
1734 struct tevent_req *subreq;
1735 uint8_t *hdr;
1736 uint8_t *body;
1737
1738 state = talloc(sconn, struct smbd_smb2_send_oplock_break_state);
1739 if (state == NULL) {
1740 return NT_STATUS_NO_MEMORY;
1741 }
1742 state->sconn = sconn;
1743
1744 state->vector.iov_base = (void *)state->buf;
1745 state->vector.iov_len = sizeof(state->buf);
1746
1747 _smb2_setlen(state->buf, sizeof(state->buf) - 4);
1748 hdr = state->buf + 4;
1749 body = hdr + SMB2_HDR_BODY;
1750
1751 SIVAL(hdr, 0, SMB2_MAGIC);
1752 SSVAL(hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
1753 SSVAL(hdr, SMB2_HDR_EPOCH, 0);
1754 SIVAL(hdr, SMB2_HDR_STATUS, 0);
1755 SSVAL(hdr, SMB2_HDR_OPCODE, SMB2_OP_BREAK);
1756 SSVAL(hdr, SMB2_HDR_CREDIT, 0);
1757 SIVAL(hdr, SMB2_HDR_FLAGS, SMB2_HDR_FLAG_REDIRECT);
1758 SIVAL(hdr, SMB2_HDR_NEXT_COMMAND, 0);
1759 SBVAL(hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
1760 SIVAL(hdr, SMB2_HDR_PID, 0);
1761 SIVAL(hdr, SMB2_HDR_TID, 0);
1762 SBVAL(hdr, SMB2_HDR_SESSION_ID, 0);
1763 memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
1764
1765 SSVAL(body, 0x00, 0x18);
1766
1767 SCVAL(body, 0x02, oplock_level);
1768 SCVAL(body, 0x03, 0); /* reserved */
1769 SIVAL(body, 0x04, 0); /* reserved */
1770 SBVAL(body, 0x08, file_id_persistent);
1771 SBVAL(body, 0x10, file_id_volatile);
1772
1773 subreq = tstream_writev_queue_send(state,
1774 sconn->smb2.event_ctx,
1775 sconn->smb2.stream,
1776 sconn->smb2.send_queue,
1777 &state->vector, 1);
1778 if (subreq == NULL) {
1779 return NT_STATUS_NO_MEMORY;
1780 }
1781 tevent_req_set_callback(subreq,
1782 smbd_smb2_oplock_break_writev_done,
1783 state);
1784
1785 return NT_STATUS_OK;
1786 }
1787
1788 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq)
1789 {
1790 struct smbd_smb2_send_oplock_break_state *state =
1791 tevent_req_callback_data(subreq,
1792 struct smbd_smb2_send_oplock_break_state);
1793 struct smbd_server_connection *sconn = state->sconn;
1794 int ret;
1795 int sys_errno;
1796
1797 ret = tstream_writev_queue_recv(subreq, &sys_errno);
1798 TALLOC_FREE(subreq);
1799 if (ret == -1) {
1800 NTSTATUS status = map_nt_error_from_unix(sys_errno);
1801 smbd_server_connection_terminate(sconn, nt_errstr(status));
1802 return;
1803 }
1804
1805 TALLOC_FREE(state);
1806 }
1807
1808 struct smbd_smb2_request_read_state {
1809 size_t missing;
1810 bool asked_for_header;
1811 struct smbd_smb2_request *smb2_req;
1812 };
1813
1814 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1815 void *private_data,
1816 TALLOC_CTX *mem_ctx,
1817 struct iovec **_vector,
1818 size_t *_count);
1819 static void smbd_smb2_request_read_done(struct tevent_req *subreq);
1820
1821 static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx,
1822 struct tevent_context *ev,
1823 struct smbd_server_connection *sconn)
1824 {
1825 struct tevent_req *req;
1826 struct smbd_smb2_request_read_state *state;
1827 struct tevent_req *subreq;
1828
1829 req = tevent_req_create(mem_ctx, &state,
1830 struct smbd_smb2_request_read_state);
1831 if (req == NULL) {
1832 return NULL;
1833 }
1834 state->missing = 0;
1835 state->asked_for_header = false;
1836
1837 state->smb2_req = smbd_smb2_request_allocate(state);
1838 if (tevent_req_nomem(state->smb2_req, req)) {
1839 return tevent_req_post(req, ev);
1840 }
1841 state->smb2_req->sconn = sconn;
1842
1843 subreq = tstream_readv_pdu_queue_send(state, ev, sconn->smb2.stream,
1844 sconn->smb2.recv_queue,
1845 smbd_smb2_request_next_vector,
1846 state);
1847 if (tevent_req_nomem(subreq, req)) {
1848 return tevent_req_post(req, ev);
1849 }
1850 tevent_req_set_callback(subreq, smbd_smb2_request_read_done, req);
1851
1852 return req;
1853 }
1854
1855 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1856 void *private_data,
1857 TALLOC_CTX *mem_ctx,
1858 struct iovec **_vector,
1859 size_t *_count)
1860 {
1861 struct smbd_smb2_request_read_state *state =
1862 talloc_get_type_abort(private_data,
1863 struct smbd_smb2_request_read_state);
1864 struct smbd_smb2_request *req = state->smb2_req;
1865 struct iovec *vector;
1866 int idx = req->in.vector_count;
1867 size_t len = 0;
1868 uint8_t *buf = NULL;
1869
1870 if (req->in.vector_count == 0) {
1871 /*
1872 * first we need to get the NBT header
1873 */
1874 req->in.vector = talloc_array(req, struct iovec,
1875 req->in.vector_count + 1);
1876 if (req->in.vector == NULL) {
1877 return -1;
1878 }
1879 req->in.vector_count += 1;
1880
1881 req->in.vector[idx].iov_base = (void *)req->in.nbt_hdr;
1882 req->in.vector[idx].iov_len = 4;
1883
1884 vector = talloc_array(mem_ctx, struct iovec, 1);
1885 if (vector == NULL) {
1886 return -1;
1887 }
1888
1889 vector[0] = req->in.vector[idx];
1890
1891 *_vector = vector;
1892 *_count = 1;
1893 return 0;
1894 }
1895
1896 if (req->in.vector_count == 1) {
1897 /*
1898 * Now we analyze the NBT header
1899 */
1900 state->missing = smb2_len(req->in.vector[0].iov_base);
1901
1902 if (state->missing == 0) {
1903 /* if there're no remaining bytes, we're done */
1904 *_vector = NULL;
1905 *_count = 0;
1906 return 0;
1907 }
1908
1909 req->in.vector = talloc_realloc(req, req->in.vector,
1910 struct iovec,
1911 req->in.vector_count + 1);
1912 if (req->in.vector == NULL) {
1913 return -1;
1914 }
1915 req->in.vector_count += 1;
1916
1917 if (CVAL(req->in.vector[0].iov_base, 0) != 0) {
1918 /*
1919 * it's a special NBT message,
1920 * so get all remaining bytes
1921 */
1922 len = state->missing;
1923 } else if (state->missing < (SMB2_HDR_BODY + 2)) {
1924 /*
1925 * it's an invalid message, just read what we can get
1926 * and let the caller handle the error
1927 */
1928 len = state->missing;
1929 } else {
1930 /*
1931 * We assume it's a SMB2 request,
1932 * and we first get the header and the
1933 * first 2 bytes (the struct size) of the body
1934 */
1935 len = SMB2_HDR_BODY + 2;
1936
1937 state->asked_for_header = true;
1938 }
1939
1940 state->missing -= len;
1941
1942 buf = talloc_array(req->in.vector, uint8_t, len);
1943 if (buf == NULL) {
1944 return -1;
1945 }
1946
1947 req->in.vector[idx].iov_base = (void *)buf;
1948 req->in.vector[idx].iov_len = len;
1949
1950 vector = talloc_array(mem_ctx, struct iovec, 1);
1951 if (vector == NULL) {
1952 return -1;
1953 }
1954
1955 vector[0] = req->in.vector[idx];
1956
1957 *_vector = vector;
1958 *_count = 1;
1959 return 0;
1960 }
1961
1962 if (state->missing == 0) {
1963 /* if there're no remaining bytes, we're done */
1964 *_vector = NULL;
1965 *_count = 0;
1966 return 0;
1967 }
1968
1969 if (state->asked_for_header) {
1970 const uint8_t *hdr;
1971 size_t full_size;
1972 size_t next_command_ofs;
1973 size_t body_size;
1974 uint8_t *body;
1975 size_t dyn_size;
1976 uint8_t *dyn;
1977 bool invalid = false;
1978
1979 state->asked_for_header = false;
1980
1981 /*
1982 * We got the SMB2 header and the first 2 bytes
1983 * of the body. We fix the size to just the header
1984 * and manually copy the 2 first bytes to the body section
1985 */
1986 req->in.vector[idx-1].iov_len = SMB2_HDR_BODY;
1987 hdr = (const uint8_t *)req->in.vector[idx-1].iov_base;
1988
1989 /* allocate vectors for body and dynamic areas */
1990 req->in.vector = talloc_realloc(req, req->in.vector,
1991 struct iovec,
1992 req->in.vector_count + 2);
1993 if (req->in.vector == NULL) {
1994 return -1;
1995 }
1996 req->in.vector_count += 2;
1997
1998 full_size = state->missing + SMB2_HDR_BODY + 2;
1999 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
2000 body_size = SVAL(hdr, SMB2_HDR_BODY);
2001
2002 if (next_command_ofs != 0) {
2003 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
2004 /*
2005 * this is invalid, just return a zero
2006 * body and let the caller deal with the error
2007 */
2008 invalid = true;
2009 } else if (next_command_ofs > full_size) {
2010 /*
2011 * this is invalid, just return a zero
2012 * body and let the caller deal with the error
2013 */
2014 invalid = true;
2015 } else {
2016 full_size = next_command_ofs;
2017 }
2018 }
2019
2020 if (!invalid) {
2021 if (body_size < 2) {
2022 /*
2023 * this is invalid, just return a zero
2024 * body and let the caller deal with the error
2025 */
2026 invalid = true;
2027 }
2028
2029 if ((body_size % 2) != 0) {
2030 body_size -= 1;
2031 }
2032
2033 if (body_size > (full_size - SMB2_HDR_BODY)) {
2034 /*
2035 * this is invalid, just return a zero
2036 * body and let the caller deal with the error
2037 */
2038 invalid = true;
2039 }
2040 }
2041
2042 if (invalid) {
2043 /* the caller should check this */
2044 body_size = 2;
2045 }
2046
2047 dyn_size = full_size - (SMB2_HDR_BODY + body_size);
2048
2049 state->missing -= (body_size - 2) + dyn_size;
2050
2051 body = talloc_array(req->in.vector, uint8_t, body_size);
2052 if (body == NULL) {
2053 return -1;
2054 }
2055
2056 dyn = talloc_array(req->in.vector, uint8_t, dyn_size);
2057 if (dyn == NULL) {
2058 return -1;
2059 }
2060
2061 req->in.vector[idx].iov_base = (void *)body;
2062 req->in.vector[idx].iov_len = body_size;
2063 req->in.vector[idx+1].iov_base = (void *)dyn;
2064 req->in.vector[idx+1].iov_len = dyn_size;
2065
2066 vector = talloc_array(mem_ctx, struct iovec, 2);
2067 if (vector == NULL) {
2068 return -1;
2069 }
2070
2071 /*
2072 * the first 2 bytes of the body were already fetched
2073 * together with the header
2074 */
2075 memcpy(body, hdr + SMB2_HDR_BODY, 2);
2076 vector[0].iov_base = body + 2;
2077 vector[0].iov_len = body_size - 2;
2078
2079 vector[1] = req->in.vector[idx+1];
2080
2081 *_vector = vector;
2082 *_count = 2;
2083 return 0;
2084 }
2085
2086 /*
2087 * when we endup here, we're looking for a new SMB2 request
2088 * next. And we ask for its header and the first 2 bytes of
2089 * the body (like we did for the first SMB2 request).
2090 */
2091
2092 req->in.vector = talloc_realloc(req, req->in.vector,
2093 struct iovec,
2094 req->in.vector_count + 1);
2095 if (req->in.vector == NULL) {
2096 return -1;
2097 }
2098 req->in.vector_count += 1;
2099
2100 /*
2101 * We assume it's a SMB2 request,
2102 * and we first get the header and the
2103 * first 2 bytes (the struct size) of the body
2104 */
2105 len = SMB2_HDR_BODY + 2;
2106
2107 if (len > state->missing) {
2108 /* let the caller handle the error */
2109 len = state->missing;
2110 }
2111
2112 state->missing -= len;
2113 state->asked_for_header = true;
2114
2115 buf = talloc_array(req->in.vector, uint8_t, len);
2116 if (buf == NULL) {
2117 return -1;
2118 }
2119
2120 req->in.vector[idx].iov_base = (void *)buf;
2121 req->in.vector[idx].iov_len = len;
2122
2123 vector = talloc_array(mem_ctx, struct iovec, 1);
2124 if (vector == NULL) {
2125 return -1;
2126 }
2127
2128 vector[0] = req->in.vector[idx];
2129
2130 *_vector = vector;
2131 *_count = 1;
2132 return 0;
2133 }
2134
2135 static void smbd_smb2_request_read_done(struct tevent_req *subreq)
2136 {
2137 struct tevent_req *req =
2138 tevent_req_callback_data(subreq,
2139 struct tevent_req);
2140 int ret;
2141 int sys_errno;
2142 NTSTATUS status;
2143
2144 ret = tstream_readv_pdu_queue_recv(subreq, &sys_errno);
2145 if (ret == -1) {
2146 status = map_nt_error_from_unix(sys_errno);
2147 tevent_req_nterror(req, status);
2148 return;
2149 }
2150
2151 tevent_req_done(req);
2152 }
2153
2154 static NTSTATUS smbd_smb2_request_read_recv(struct tevent_req *req,
2155 TALLOC_CTX *mem_ctx,
2156 struct smbd_smb2_request **_smb2_req)
2157 {
2158 struct smbd_smb2_request_read_state *state =
2159 tevent_req_data(req,
2160 struct smbd_smb2_request_read_state);
2161 NTSTATUS status;
2162
2163 if (tevent_req_is_nterror(req, &status)) {
2164 tevent_req_received(req);
2165 return status;
2166 }
2167
2168 talloc_steal(mem_ctx, state->smb2_req->mem_pool);
2169 *_smb2_req = state->smb2_req;
2170 tevent_req_received(req);
2171 return NT_STATUS_OK;
2172 }
2173
2174 static void smbd_smb2_request_incoming(struct tevent_req *subreq);
2175
2176 void smbd_smb2_first_negprot(struct smbd_server_connection *sconn,
2177 const uint8_t *inbuf, size_t size)
2178 {
2179 NTSTATUS status;
2180 struct smbd_smb2_request *req = NULL;
2181 struct tevent_req *subreq;
2182
2183 DEBUG(10,("smbd_smb2_first_negprot: packet length %u\n",
2184 (unsigned int)size));
2185
2186 status = smbd_initialize_smb2(sconn);
2187 if (!NT_STATUS_IS_OK(status)) {
2188 smbd_server_connection_terminate(sconn, nt_errstr(status));
2189 return;
2190 }
2191
2192 status = smbd_smb2_request_create(sconn, inbuf, size, &req);
2193 if (!NT_STATUS_IS_OK(status)) {
2194 smbd_server_connection_terminate(sconn, nt_errstr(status));
2195 return;
2196 }
2197
2198 status = smbd_smb2_request_setup_out(req);
2199 if (!NT_STATUS_IS_OK(status)) {
2200 smbd_server_connection_terminate(sconn, nt_errstr(status));
2201 return;
2202 }
2203
2204 status = smbd_smb2_request_dispatch(req);
2205 if (!NT_STATUS_IS_OK(status)) {
2206 smbd_server_connection_terminate(sconn, nt_errstr(status));
2207 return;
2208 }
2209
2210 /* ask for the next request */
2211 subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
2212 if (subreq == NULL) {
2213 smbd_server_connection_terminate(sconn, "no memory for reading");
2214 return;
2215 }
2216 tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
2217 }
2218
2219 static void smbd_smb2_request_incoming(struct tevent_req *subreq)
2220 {
2221 struct smbd_server_connection *sconn = tevent_req_callback_data(subreq,
2222 struct smbd_server_connection);
2223 NTSTATUS status;
2224 struct smbd_smb2_request *req = NULL;
2225
2226 status = smbd_smb2_request_read_recv(subreq, sconn, &req);
2227 TALLOC_FREE(subreq);
2228 if (!NT_STATUS_IS_OK(status)) {
2229 DEBUG(2,("smbd_smb2_request_incoming: client read error %s\n",
2230 nt_errstr(status)));
2231 smbd_server_connection_terminate(sconn, nt_errstr(status));
2232 return;
2233 }
2234
2235 if (req->in.nbt_hdr[0] != 0x00) {
2236 DEBUG(1,("smbd_smb2_request_incoming: ignore NBT[0x%02X] msg\n",
2237 req->in.nbt_hdr[0]));
2238 TALLOC_FREE(req);
2239 goto next;
2240 }
2241
2242 req->current_idx = 1;
2243
2244 DEBUG(10,("smbd_smb2_request_incoming: idx[%d] of %d vectors\n",
2245 req->current_idx, req->in.vector_count));
2246
2247 status = smbd_smb2_request_validate(req);
2248 if (!NT_STATUS_IS_OK(status)) {
2249 smbd_server_connection_terminate(sconn, nt_errstr(status));
2250 return;
2251 }
2252
2253 status = smbd_smb2_request_setup_out(req);
2254 if (!NT_STATUS_IS_OK(status)) {
2255 smbd_server_connection_terminate(sconn, nt_errstr(status));
2256 return;
2257 }
2258
2259 status = smbd_smb2_request_dispatch(req);
2260 if (!NT_STATUS_IS_OK(status)) {
2261 smbd_server_connection_terminate(sconn, nt_errstr(status));
2262 return;
2263 }
2264
2265 next:
2266 /* ask for the next request (this constructs the main loop) */
2267 subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
2268 if (subreq == NULL) {
2269 smbd_server_connection_terminate(sconn, "no memory for reading");
2270 return;
2271 }
2272 tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
2273 }
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