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s3: Fix Coverity ID 986, BUFFER_SIZE_WARNING
[Samba.git] / source3 / smbd / smb2_server.c
blob0004e7ca8caf781cc831f491979a258f26ce4a99
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 "smbprofile.h"
28
29 #define OUTVEC_ALLOC_SIZE (SMB2_HDR_BODY + 9)
30
31 static const char *smb2_names[] = {
32 "SMB2_NEGPROT",
33 "SMB2_SESSSETUP",
34 "SMB2_LOGOFF",
35 "SMB2_TCON",
36 "SMB2_TDIS",
37 "SMB2_CREATE",
38 "SMB2_CLOSE",
39 "SMB2_FLUSH",
40 "SMB2_READ",
41 "SMB2_WRITE",
42 "SMB2_LOCK",
43 "SMB2_IOCTL",
44 "SMB2_CANCEL",
45 "SMB2_KEEPALIVE",
46 "SMB2_FIND",
47 "SMB2_NOTIFY",
48 "SMB2_GETINFO",
49 "SMB2_SETINFO",
50 "SMB2_BREAK"
51 };
52
53 const char *smb2_opcode_name(uint16_t opcode)
54 {
55 if (opcode > 0x12) {
56 return "Bad SMB2 opcode";
57 }
58 return smb2_names[opcode];
59 }
60
61 static void print_req_vectors(struct smbd_smb2_request *req)
62 {
63 int i;
64
65 for (i = 0; i < req->in.vector_count; i++) {
66 dbgtext("\treq->in.vector[%u].iov_len = %u\n",
67 (unsigned int)i,
68 (unsigned int)req->in.vector[i].iov_len);
69 }
70 for (i = 0; i < req->out.vector_count; i++) {
71 dbgtext("\treq->out.vector[%u].iov_len = %u\n",
72 (unsigned int)i,
73 (unsigned int)req->out.vector[i].iov_len);
74 }
75 }
76
77 bool smbd_is_smb2_header(const uint8_t *inbuf, size_t size)
78 {
79 if (size < (4 + SMB2_HDR_BODY)) {
80 return false;
81 }
82
83 if (IVAL(inbuf, 4) != SMB2_MAGIC) {
84 return false;
85 }
86
87 return true;
88 }
89
90 static NTSTATUS smbd_initialize_smb2(struct smbd_server_connection *sconn)
91 {
92 NTSTATUS status;
93 int ret;
94
95 TALLOC_FREE(sconn->smb1.fde);
96
97 sconn->smb2.event_ctx = smbd_event_context();
98
99 sconn->smb2.recv_queue = tevent_queue_create(sconn, "smb2 recv queue");
100 if (sconn->smb2.recv_queue == NULL) {
101 return NT_STATUS_NO_MEMORY;
102 }
103
104 sconn->smb2.send_queue = tevent_queue_create(sconn, "smb2 send queue");
105 if (sconn->smb2.send_queue == NULL) {
106 return NT_STATUS_NO_MEMORY;
107 }
108
109 sconn->smb2.sessions.idtree = idr_init(sconn);
110 if (sconn->smb2.sessions.idtree == NULL) {
111 return NT_STATUS_NO_MEMORY;
112 }
113 sconn->smb2.sessions.limit = 0x0000FFFE;
114 sconn->smb2.sessions.list = NULL;
115 sconn->smb2.seqnum_low = 0;
116 sconn->smb2.credits_granted = 0;
117 sconn->smb2.max_credits = lp_smb2_max_credits();
118 sconn->smb2.credits_bitmap = bitmap_talloc(sconn,
119 DEFAULT_SMB2_MAX_CREDIT_BITMAP_FACTOR*sconn->smb2.max_credits);
120 if (sconn->smb2.credits_bitmap == NULL) {
121 return NT_STATUS_NO_MEMORY;
122 }
123
124 ret = tstream_bsd_existing_socket(sconn, sconn->sock,
125 &sconn->smb2.stream);
126 if (ret == -1) {
127 status = map_nt_error_from_unix(errno);
128 return status;
129 }
130
131 /* Ensure child is set to non-blocking mode */
132 set_blocking(sconn->sock, false);
133 return NT_STATUS_OK;
134 }
135
136 #define smb2_len(buf) (PVAL(buf,3)|(PVAL(buf,2)<<8)|(PVAL(buf,1)<<16))
137 #define _smb2_setlen(_buf,len) do { \
138 uint8_t *buf = (uint8_t *)_buf; \
139 buf[0] = 0; \
140 buf[1] = ((len)&0xFF0000)>>16; \
141 buf[2] = ((len)&0xFF00)>>8; \
142 buf[3] = (len)&0xFF; \
143 } while (0)
144
145 static void smb2_setup_nbt_length(struct iovec *vector, int count)
146 {
147 size_t len = 0;
148 int i;
149
150 for (i=1; i < count; i++) {
151 len += vector[i].iov_len;
152 }
153
154 _smb2_setlen(vector[0].iov_base, len);
155 }
156
157 static int smbd_smb2_request_parent_destructor(struct smbd_smb2_request **req)
158 {
159 if (*req) {
160 (*req)->parent = NULL;
161 (*req)->mem_pool = NULL;
162 }
163
164 return 0;
165 }
166
167 static int smbd_smb2_request_destructor(struct smbd_smb2_request *req)
168 {
169 if (req->parent) {
170 *req->parent = NULL;
171 talloc_free(req->mem_pool);
172 }
173
174 return 0;
175 }
176
177 static struct smbd_smb2_request *smbd_smb2_request_allocate(TALLOC_CTX *mem_ctx)
178 {
179 TALLOC_CTX *mem_pool;
180 struct smbd_smb2_request **parent;
181 struct smbd_smb2_request *req;
182
183 #if 0
184 /* Enable this to find subtle valgrind errors. */
185 mem_pool = talloc_init("smbd_smb2_request_allocate");
186 #else
187 mem_pool = talloc_pool(mem_ctx, 8192);
188 #endif
189 if (mem_pool == NULL) {
190 return NULL;
191 }
192
193 parent = talloc(mem_pool, struct smbd_smb2_request *);
194 if (parent == NULL) {
195 talloc_free(mem_pool);
196 return NULL;
197 }
198
199 req = talloc_zero(parent, struct smbd_smb2_request);
200 if (req == NULL) {
201 talloc_free(mem_pool);
202 return NULL;
203 }
204 *parent = req;
205 req->mem_pool = mem_pool;
206 req->parent = parent;
207
208 talloc_set_destructor(parent, smbd_smb2_request_parent_destructor);
209 talloc_set_destructor(req, smbd_smb2_request_destructor);
210
211 return req;
212 }
213
214 static NTSTATUS smbd_smb2_request_create(struct smbd_server_connection *sconn,
215 const uint8_t *inbuf, size_t size,
216 struct smbd_smb2_request **_req)
217 {
218 struct smbd_smb2_request *req;
219 uint32_t protocol_version;
220 const uint8_t *inhdr = NULL;
221 off_t ofs = 0;
222 uint16_t cmd;
223 uint32_t next_command_ofs;
224
225 if (size < (4 + SMB2_HDR_BODY + 2)) {
226 DEBUG(0,("Invalid SMB2 packet length count %ld\n", (long)size));
227 return NT_STATUS_INVALID_PARAMETER;
228 }
229
230 inhdr = inbuf + 4;
231
232 protocol_version = IVAL(inhdr, SMB2_HDR_PROTOCOL_ID);
233 if (protocol_version != SMB2_MAGIC) {
234 DEBUG(0,("Invalid SMB packet: protocol prefix: 0x%08X\n",
235 protocol_version));
236 return NT_STATUS_INVALID_PARAMETER;
237 }
238
239 cmd = SVAL(inhdr, SMB2_HDR_OPCODE);
240 if (cmd != SMB2_OP_NEGPROT) {
241 DEBUG(0,("Invalid SMB packet: first request: 0x%04X\n",
242 cmd));
243 return NT_STATUS_INVALID_PARAMETER;
244 }
245
246 next_command_ofs = IVAL(inhdr, SMB2_HDR_NEXT_COMMAND);
247 if (next_command_ofs != 0) {
248 DEBUG(0,("Invalid SMB packet: next_command: 0x%08X\n",
249 next_command_ofs));
250 return NT_STATUS_INVALID_PARAMETER;
251 }
252
253 req = smbd_smb2_request_allocate(sconn);
254 if (req == NULL) {
255 return NT_STATUS_NO_MEMORY;
256 }
257 req->sconn = sconn;
258
259 talloc_steal(req, inbuf);
260
261 req->in.vector = talloc_array(req, struct iovec, 4);
262 if (req->in.vector == NULL) {
263 TALLOC_FREE(req);
264 return NT_STATUS_NO_MEMORY;
265 }
266 req->in.vector_count = 4;
267
268 memcpy(req->in.nbt_hdr, inbuf, 4);
269
270 ofs = 0;
271 req->in.vector[0].iov_base = (void *)req->in.nbt_hdr;
272 req->in.vector[0].iov_len = 4;
273 ofs += req->in.vector[0].iov_len;
274
275 req->in.vector[1].iov_base = (void *)(inbuf + ofs);
276 req->in.vector[1].iov_len = SMB2_HDR_BODY;
277 ofs += req->in.vector[1].iov_len;
278
279 req->in.vector[2].iov_base = (void *)(inbuf + ofs);
280 req->in.vector[2].iov_len = SVAL(inbuf, ofs) & 0xFFFE;
281 ofs += req->in.vector[2].iov_len;
282
283 if (ofs > size) {
284 return NT_STATUS_INVALID_PARAMETER;
285 }
286
287 req->in.vector[3].iov_base = (void *)(inbuf + ofs);
288 req->in.vector[3].iov_len = size - ofs;
289 ofs += req->in.vector[3].iov_len;
290
291 req->current_idx = 1;
292
293 *_req = req;
294 return NT_STATUS_OK;
295 }
296
297 static bool smb2_validate_message_id(struct smbd_server_connection *sconn,
298 const uint8_t *inhdr)
299 {
300 uint64_t message_id = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
301 struct bitmap *credits_bm = sconn->smb2.credits_bitmap;
302 uint16_t opcode = IVAL(inhdr, SMB2_HDR_OPCODE);
303 unsigned int bitmap_offset;
304
305 if (opcode == SMB2_OP_CANCEL) {
306 /* SMB2_CANCEL requests by definition resend messageids. */
307 return true;
308 }
309
310 if (message_id < sconn->smb2.seqnum_low ||
311 message_id > (sconn->smb2.seqnum_low +
312 (sconn->smb2.max_credits * DEFAULT_SMB2_MAX_CREDIT_BITMAP_FACTOR))) {
313 DEBUG(0,("smb2_validate_message_id: bad message_id "
314 "%llu (low = %llu, max = %lu)\n",
315 (unsigned long long)message_id,
316 (unsigned long long)sconn->smb2.seqnum_low,
317 (unsigned long)sconn->smb2.max_credits ));
318 return false;
319 }
320
321 /* client just used a credit. */
322 SMB_ASSERT(sconn->smb2.credits_granted > 0);
323 sconn->smb2.credits_granted -= 1;
324
325 /* Mark the message_id as seen in the bitmap. */
326 bitmap_offset = (unsigned int)(message_id %
327 (uint64_t)(sconn->smb2.max_credits * DEFAULT_SMB2_MAX_CREDIT_BITMAP_FACTOR));
328 if (bitmap_query(credits_bm, bitmap_offset)) {
329 DEBUG(0,("smb2_validate_message_id: duplicate message_id "
330 "%llu (bm offset %u)\n",
331 (unsigned long long)message_id,
332 bitmap_offset));
333 return false;
334 }
335 bitmap_set(credits_bm, bitmap_offset);
336
337 if (message_id == sconn->smb2.seqnum_low + 1) {
338 /* Move the window forward by all the message_id's
339 already seen. */
340 while (bitmap_query(credits_bm, bitmap_offset)) {
341 DEBUG(10,("smb2_validate_message_id: clearing "
342 "id %llu (position %u) from bitmap\n",
343 (unsigned long long)(sconn->smb2.seqnum_low + 1),
344 bitmap_offset ));
345 bitmap_clear(credits_bm, bitmap_offset);
346 sconn->smb2.seqnum_low += 1;
347 bitmap_offset = (bitmap_offset + 1) %
348 (sconn->smb2.max_credits * DEFAULT_SMB2_MAX_CREDIT_BITMAP_FACTOR);
349 }
350 }
351
352 return true;
353 }
354
355 static NTSTATUS smbd_smb2_request_validate(struct smbd_smb2_request *req)
356 {
357 int count;
358 int idx;
359 bool compound_related = false;
360
361 count = req->in.vector_count;
362
363 if (count < 4) {
364 /* It's not a SMB2 request */
365 return NT_STATUS_INVALID_PARAMETER;
366 }
367
368 for (idx=1; idx < count; idx += 3) {
369 const uint8_t *inhdr = NULL;
370 uint32_t flags;
371
372 if (req->in.vector[idx].iov_len != SMB2_HDR_BODY) {
373 return NT_STATUS_INVALID_PARAMETER;
374 }
375
376 if (req->in.vector[idx+1].iov_len < 2) {
377 return NT_STATUS_INVALID_PARAMETER;
378 }
379
380 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
381
382 /* Check the SMB2 header */
383 if (IVAL(inhdr, SMB2_HDR_PROTOCOL_ID) != SMB2_MAGIC) {
384 return NT_STATUS_INVALID_PARAMETER;
385 }
386
387 if (!smb2_validate_message_id(req->sconn, inhdr)) {
388 return NT_STATUS_INVALID_PARAMETER;
389 }
390
391 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
392 if (idx == 1) {
393 /*
394 * the 1st request should never have the
395 * SMB2_HDR_FLAG_CHAINED flag set
396 */
397 if (flags & SMB2_HDR_FLAG_CHAINED) {
398 req->next_status = NT_STATUS_INVALID_PARAMETER;
399 return NT_STATUS_OK;
400 }
401 } else if (idx == 4) {
402 /*
403 * the 2nd request triggers related vs. unrelated
404 * compounded requests
405 */
406 if (flags & SMB2_HDR_FLAG_CHAINED) {
407 compound_related = true;
408 }
409 } else if (idx > 4) {
410 #if 0
411 /*
412 * It seems the this tests are wrong
413 * see the SMB2-COMPOUND test
414 */
415
416 /*
417 * all other requests should match the 2nd one
418 */
419 if (flags & SMB2_HDR_FLAG_CHAINED) {
420 if (!compound_related) {
421 req->next_status =
422 NT_STATUS_INVALID_PARAMETER;
423 return NT_STATUS_OK;
424 }
425 } else {
426 if (compound_related) {
427 req->next_status =
428 NT_STATUS_INVALID_PARAMETER;
429 return NT_STATUS_OK;
430 }
431 }
432 #endif
433 }
434 }
435
436 return NT_STATUS_OK;
437 }
438
439 static void smb2_set_operation_credit(struct smbd_server_connection *sconn,
440 const struct iovec *in_vector,
441 struct iovec *out_vector)
442 {
443 uint8_t *outhdr = (uint8_t *)out_vector->iov_base;
444 uint16_t credits_requested = 0;
445 uint16_t credits_granted = 0;
446
447 if (in_vector != NULL) {
448 const uint8_t *inhdr = (const uint8_t *)in_vector->iov_base;
449 credits_requested = SVAL(inhdr, SMB2_HDR_CREDIT);
450 }
451
452 SMB_ASSERT(sconn->smb2.max_credits >= sconn->smb2.credits_granted);
453
454 /* Remember what we gave out. */
455 credits_granted = MIN(credits_requested, (sconn->smb2.max_credits -
456 sconn->smb2.credits_granted));
457
458 if (credits_granted == 0 && sconn->smb2.credits_granted == 0) {
459 /* First negprot packet, or ensure the client credits can
460 never drop to zero. */
461 credits_granted = 1;
462 }
463
464 SSVAL(outhdr, SMB2_HDR_CREDIT, credits_granted);
465 sconn->smb2.credits_granted += credits_granted;
466
467 DEBUG(10,("smb2_set_operation_credit: requested %u, "
468 "granted %u, total granted %u\n",
469 (unsigned int)credits_requested,
470 (unsigned int)credits_granted,
471 (unsigned int)sconn->smb2.credits_granted ));
472 }
473
474 static void smb2_calculate_credits(const struct smbd_smb2_request *inreq,
475 struct smbd_smb2_request *outreq)
476 {
477 int count, idx;
478
479 count = outreq->out.vector_count;
480
481 for (idx=1; idx < count; idx += 3) {
482 smb2_set_operation_credit(outreq->sconn,
483 &inreq->in.vector[idx],
484 &outreq->out.vector[idx]);
485 }
486 }
487
488 static NTSTATUS smbd_smb2_request_setup_out(struct smbd_smb2_request *req)
489 {
490 struct iovec *vector;
491 int count;
492 int idx;
493
494 count = req->in.vector_count;
495 vector = talloc_zero_array(req, struct iovec, count);
496 if (vector == NULL) {
497 return NT_STATUS_NO_MEMORY;
498 }
499
500 vector[0].iov_base = req->out.nbt_hdr;
501 vector[0].iov_len = 4;
502 SIVAL(req->out.nbt_hdr, 0, 0);
503
504 for (idx=1; idx < count; idx += 3) {
505 const uint8_t *inhdr = NULL;
506 uint32_t in_flags;
507 uint8_t *outhdr = NULL;
508 uint8_t *outbody = NULL;
509 uint32_t next_command_ofs = 0;
510 struct iovec *current = &vector[idx];
511
512 if ((idx + 3) < count) {
513 /* we have a next command -
514 * setup for the error case. */
515 next_command_ofs = SMB2_HDR_BODY + 9;
516 }
517
518 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
519 in_flags = IVAL(inhdr, SMB2_HDR_FLAGS);
520
521 outhdr = talloc_zero_array(vector, uint8_t,
522 OUTVEC_ALLOC_SIZE);
523 if (outhdr == NULL) {
524 return NT_STATUS_NO_MEMORY;
525 }
526
527 outbody = outhdr + SMB2_HDR_BODY;
528
529 current[0].iov_base = (void *)outhdr;
530 current[0].iov_len = SMB2_HDR_BODY;
531
532 current[1].iov_base = (void *)outbody;
533 current[1].iov_len = 8;
534
535 current[2].iov_base = NULL;
536 current[2].iov_len = 0;
537
538 /* setup the SMB2 header */
539 SIVAL(outhdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
540 SSVAL(outhdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
541 SSVAL(outhdr, SMB2_HDR_EPOCH, 0);
542 SIVAL(outhdr, SMB2_HDR_STATUS,
543 NT_STATUS_V(NT_STATUS_INTERNAL_ERROR));
544 SSVAL(outhdr, SMB2_HDR_OPCODE,
545 SVAL(inhdr, SMB2_HDR_OPCODE));
546 SIVAL(outhdr, SMB2_HDR_FLAGS,
547 IVAL(inhdr, SMB2_HDR_FLAGS) | SMB2_HDR_FLAG_REDIRECT);
548 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
549 SBVAL(outhdr, SMB2_HDR_MESSAGE_ID,
550 BVAL(inhdr, SMB2_HDR_MESSAGE_ID));
551 SIVAL(outhdr, SMB2_HDR_PID,
552 IVAL(inhdr, SMB2_HDR_PID));
553 SIVAL(outhdr, SMB2_HDR_TID,
554 IVAL(inhdr, SMB2_HDR_TID));
555 SBVAL(outhdr, SMB2_HDR_SESSION_ID,
556 BVAL(inhdr, SMB2_HDR_SESSION_ID));
557 memset(outhdr + SMB2_HDR_SIGNATURE, 0, 16);
558
559 /* setup error body header */
560 SSVAL(outbody, 0x00, 0x08 + 1);
561 SSVAL(outbody, 0x02, 0);
562 SIVAL(outbody, 0x04, 0);
563 }
564
565 req->out.vector = vector;
566 req->out.vector_count = count;
567
568 /* setup the length of the NBT packet */
569 smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
570
571 DLIST_ADD_END(req->sconn->smb2.requests, req, struct smbd_smb2_request *);
572
573 return NT_STATUS_OK;
574 }
575
576 void smbd_server_connection_terminate_ex(struct smbd_server_connection *sconn,
577 const char *reason,
578 const char *location)
579 {
580 DEBUG(10,("smbd_server_connection_terminate_ex: reason[%s] at %s\n",
581 reason, location));
582 exit_server_cleanly(reason);
583 }
584
585 static bool dup_smb2_vec3(TALLOC_CTX *ctx,
586 struct iovec *outvec,
587 const struct iovec *srcvec)
588 {
589 /* vec[0] is always boilerplate and must
590 * be allocated with size OUTVEC_ALLOC_SIZE. */
591
592 outvec[0].iov_base = talloc_memdup(ctx,
593 srcvec[0].iov_base,
594 OUTVEC_ALLOC_SIZE);
595 if (!outvec[0].iov_base) {
596 return false;
597 }
598 outvec[0].iov_len = SMB2_HDR_BODY;
599
600 /*
601 * If this is a "standard" vec[1] of length 8,
602 * pointing to srcvec[0].iov_base + SMB2_HDR_BODY,
603 * then duplicate this. Else use talloc_memdup().
604 */
605
606 if (srcvec[1].iov_len == 8 &&
607 srcvec[1].iov_base ==
608 ((uint8_t *)srcvec[0].iov_base) +
609 SMB2_HDR_BODY) {
610 outvec[1].iov_base = ((uint8_t *)outvec[1].iov_base) +
611 SMB2_HDR_BODY;
612 outvec[1].iov_len = 8;
613 } else {
614 outvec[1].iov_base = talloc_memdup(ctx,
615 srcvec[1].iov_base,
616 srcvec[1].iov_len);
617 if (!outvec[1].iov_base) {
618 return false;
619 }
620 outvec[1].iov_len = srcvec[1].iov_len;
621 }
622
623 /*
624 * If this is a "standard" vec[2] of length 1,
625 * pointing to srcvec[0].iov_base + (OUTVEC_ALLOC_SIZE - 1)
626 * then duplicate this. Else use talloc_memdup().
627 */
628
629 if (srcvec[2].iov_base &&
630 srcvec[2].iov_len) {
631 if (srcvec[2].iov_base ==
632 ((uint8_t *)srcvec[0].iov_base) +
633 (OUTVEC_ALLOC_SIZE - 1) &&
634 srcvec[2].iov_len == 1) {
635 /* Common SMB2 error packet case. */
636 outvec[2].iov_base = ((uint8_t *)outvec[0].iov_base) +
637 (OUTVEC_ALLOC_SIZE - 1);
638 } else {
639 outvec[2].iov_base = talloc_memdup(ctx,
640 srcvec[2].iov_base,
641 srcvec[2].iov_len);
642 if (!outvec[2].iov_base) {
643 return false;
644 }
645 }
646 outvec[2].iov_len = srcvec[2].iov_len;
647 } else {
648 outvec[2].iov_base = NULL;
649 outvec[2].iov_len = 0;
650 }
651 return true;
652 }
653
654 static struct smbd_smb2_request *dup_smb2_req(const struct smbd_smb2_request *req)
655 {
656 struct smbd_smb2_request *newreq = NULL;
657 struct iovec *outvec = NULL;
658 int count = req->out.vector_count;
659 int i;
660
661 newreq = smbd_smb2_request_allocate(req->sconn);
662 if (!newreq) {
663 return NULL;
664 }
665
666 newreq->sconn = req->sconn;
667 newreq->do_signing = req->do_signing;
668 newreq->current_idx = req->current_idx;
669 newreq->async = false;
670 newreq->cancelled = false;
671
672 outvec = talloc_zero_array(newreq, struct iovec, count);
673 if (!outvec) {
674 TALLOC_FREE(newreq);
675 return NULL;
676 }
677 newreq->out.vector = outvec;
678 newreq->out.vector_count = count;
679
680 /* Setup the outvec's identically to req. */
681 outvec[0].iov_base = newreq->out.nbt_hdr;
682 outvec[0].iov_len = 4;
683 memcpy(newreq->out.nbt_hdr, req->out.nbt_hdr, 4);
684
685 /* Setup the vectors identically to the ones in req. */
686 for (i = 1; i < count; i += 3) {
687 if (!dup_smb2_vec3(outvec, &outvec[i], &req->out.vector[i])) {
688 break;
689 }
690 }
691
692 if (i < count) {
693 /* Alloc failed. */
694 TALLOC_FREE(newreq);
695 return NULL;
696 }
697
698 smb2_setup_nbt_length(newreq->out.vector,
699 newreq->out.vector_count);
700
701 return newreq;
702 }
703
704 static void smbd_smb2_request_writev_done(struct tevent_req *subreq);
705
706 static NTSTATUS smb2_send_async_interim_response(const struct smbd_smb2_request *req)
707 {
708 int i = 0;
709 uint8_t *outhdr = NULL;
710 struct smbd_smb2_request *nreq = NULL;
711
712 /* Create a new smb2 request we'll use
713 for the interim return. */
714 nreq = dup_smb2_req(req);
715 if (!nreq) {
716 return NT_STATUS_NO_MEMORY;
717 }
718
719 /* Lose the last 3 out vectors. They're the
720 ones we'll be using for the async reply. */
721 nreq->out.vector_count -= 3;
722
723 smb2_setup_nbt_length(nreq->out.vector,
724 nreq->out.vector_count);
725
726 /* Step back to the previous reply. */
727 i = nreq->current_idx - 3;
728 outhdr = (uint8_t *)nreq->out.vector[i].iov_base;
729 /* And end the chain. */
730 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, 0);
731
732 /* Calculate outgoing credits */
733 smb2_calculate_credits(req, nreq);
734
735 /* Re-sign if needed. */
736 if (nreq->do_signing) {
737 NTSTATUS status;
738 status = smb2_signing_sign_pdu(nreq->session->session_key,
739 &nreq->out.vector[i], 3);
740 if (!NT_STATUS_IS_OK(status)) {
741 return status;
742 }
743 }
744 if (DEBUGLEVEL >= 10) {
745 dbgtext("smb2_send_async_interim_response: nreq->current_idx = %u\n",
746 (unsigned int)nreq->current_idx );
747 dbgtext("smb2_send_async_interim_response: returning %u vectors\n",
748 (unsigned int)nreq->out.vector_count );
749 print_req_vectors(nreq);
750 }
751 nreq->subreq = tstream_writev_queue_send(nreq,
752 nreq->sconn->smb2.event_ctx,
753 nreq->sconn->smb2.stream,
754 nreq->sconn->smb2.send_queue,
755 nreq->out.vector,
756 nreq->out.vector_count);
757
758 if (nreq->subreq == NULL) {
759 return NT_STATUS_NO_MEMORY;
760 }
761
762 tevent_req_set_callback(nreq->subreq,
763 smbd_smb2_request_writev_done,
764 nreq);
765
766 return NT_STATUS_OK;
767 }
768
769 struct smbd_smb2_request_pending_state {
770 struct smbd_server_connection *sconn;
771 uint8_t buf[4 + SMB2_HDR_BODY + 0x08 + 1];
772 struct iovec vector[3];
773 };
774
775 static void smbd_smb2_request_pending_writev_done(struct tevent_req *subreq)
776 {
777 struct smbd_smb2_request_pending_state *state =
778 tevent_req_callback_data(subreq,
779 struct smbd_smb2_request_pending_state);
780 struct smbd_server_connection *sconn = state->sconn;
781 int ret;
782 int sys_errno;
783
784 ret = tstream_writev_queue_recv(subreq, &sys_errno);
785 TALLOC_FREE(subreq);
786 if (ret == -1) {
787 NTSTATUS status = map_nt_error_from_unix(sys_errno);
788 smbd_server_connection_terminate(sconn, nt_errstr(status));
789 return;
790 }
791
792 TALLOC_FREE(state);
793 }
794
795 NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req,
796 struct tevent_req *subreq)
797 {
798 NTSTATUS status;
799 struct smbd_smb2_request_pending_state *state = NULL;
800 int i = req->current_idx;
801 uint8_t *reqhdr = NULL;
802 uint8_t *hdr = NULL;
803 uint8_t *body = NULL;
804 uint32_t flags = 0;
805 uint64_t message_id = 0;
806 uint64_t async_id = 0;
807 struct iovec *outvec = NULL;
808
809 if (!tevent_req_is_in_progress(subreq)) {
810 return NT_STATUS_OK;
811 }
812
813 req->subreq = subreq;
814 subreq = NULL;
815
816 if (req->async) {
817 /* We're already async. */
818 return NT_STATUS_OK;
819 }
820
821 if (req->in.vector_count > i + 3) {
822 /*
823 * We're trying to go async in a compound
824 * request chain. This is not allowed.
825 * Cancel the outstanding request.
826 */
827 tevent_req_cancel(req->subreq);
828 return smbd_smb2_request_error(req,
829 NT_STATUS_INSUFFICIENT_RESOURCES);
830 }
831
832 if (DEBUGLEVEL >= 10) {
833 dbgtext("smbd_smb2_request_pending_queue: req->current_idx = %u\n",
834 (unsigned int)req->current_idx );
835 print_req_vectors(req);
836 }
837
838 if (req->out.vector_count > 4) {
839 /* This is a compound reply. We
840 * must do an interim response
841 * followed by the async response
842 * to match W2K8R2.
843 */
844 status = smb2_send_async_interim_response(req);
845 if (!NT_STATUS_IS_OK(status)) {
846 return status;
847 }
848 }
849
850 /* Don't return an intermediate packet on a pipe read/write. */
851 if (req->tcon && req->tcon->compat_conn && IS_IPC(req->tcon->compat_conn)) {
852 return NT_STATUS_OK;
853 }
854
855 reqhdr = (uint8_t *)req->out.vector[i].iov_base;
856 flags = (IVAL(reqhdr, SMB2_HDR_FLAGS) & ~SMB2_HDR_FLAG_CHAINED);
857 message_id = BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
858 async_id = message_id; /* keep it simple for now... */
859
860 /*
861 * What we send is identical to a smbd_smb2_request_error
862 * packet with an error status of STATUS_PENDING. Make use
863 * of this fact sometime when refactoring. JRA.
864 */
865
866 state = talloc_zero(req->sconn, struct smbd_smb2_request_pending_state);
867 if (state == NULL) {
868 return NT_STATUS_NO_MEMORY;
869 }
870 state->sconn = req->sconn;
871
872 state->vector[0].iov_base = (void *)state->buf;
873 state->vector[0].iov_len = 4;
874
875 state->vector[1].iov_base = state->buf + 4;
876 state->vector[1].iov_len = SMB2_HDR_BODY;
877
878 state->vector[2].iov_base = state->buf + 4 + SMB2_HDR_BODY;
879 state->vector[2].iov_len = 9;
880
881 smb2_setup_nbt_length(state->vector, 3);
882
883 hdr = (uint8_t *)state->vector[1].iov_base;
884 body = (uint8_t *)state->vector[2].iov_base;
885
886 SIVAL(hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
887 SSVAL(hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
888 SSVAL(hdr, SMB2_HDR_EPOCH, 0);
889 SIVAL(hdr, SMB2_HDR_STATUS, NT_STATUS_V(STATUS_PENDING));
890 SSVAL(hdr, SMB2_HDR_OPCODE, SVAL(reqhdr, SMB2_HDR_OPCODE));
891
892 SIVAL(hdr, SMB2_HDR_FLAGS, flags | SMB2_HDR_FLAG_ASYNC);
893 SIVAL(hdr, SMB2_HDR_NEXT_COMMAND, 0);
894 SBVAL(hdr, SMB2_HDR_MESSAGE_ID, message_id);
895 SBVAL(hdr, SMB2_HDR_PID, async_id);
896 SBVAL(hdr, SMB2_HDR_SESSION_ID,
897 BVAL(reqhdr, SMB2_HDR_SESSION_ID));
898 memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
899
900 SSVAL(body, 0x00, 0x08 + 1);
901
902 SCVAL(body, 0x02, 0);
903 SCVAL(body, 0x03, 0);
904 SIVAL(body, 0x04, 0);
905 /* Match W2K8R2... */
906 SCVAL(body, 0x08, 0x21);
907
908 /* Ensure we correctly go through crediting. Grant
909 the credits now, and zero credits on the final
910 response. */
911 smb2_set_operation_credit(req->sconn,
912 &req->in.vector[i],
913 &state->vector[1]);
914
915 if (req->do_signing) {
916 status = smb2_signing_sign_pdu(req->session->session_key,
917 state->vector, 3);
918 if (!NT_STATUS_IS_OK(status)) {
919 return status;
920 }
921 }
922
923 subreq = tstream_writev_queue_send(state,
924 req->sconn->smb2.event_ctx,
925 req->sconn->smb2.stream,
926 req->sconn->smb2.send_queue,
927 state->vector,
928 3);
929
930 if (subreq == NULL) {
931 return NT_STATUS_NO_MEMORY;
932 }
933
934 tevent_req_set_callback(subreq,
935 smbd_smb2_request_pending_writev_done,
936 state);
937
938 /* Note we're going async with this request. */
939 req->async = true;
940
941 /*
942 * Now manipulate req so that the outstanding async request
943 * is the only one left in the struct smbd_smb2_request.
944 */
945
946 if (req->current_idx == 1) {
947 /* There was only one. */
948 goto out;
949 }
950
951 /* Re-arrange the in.vectors. */
952 req->in.vector[1] = req->in.vector[i];
953 req->in.vector[2] = req->in.vector[i+1];
954 req->in.vector[3] = req->in.vector[i+2];
955 req->in.vector_count = 4;
956 /* Reset the new in size. */
957 smb2_setup_nbt_length(req->in.vector, 4);
958
959 /* Now recreate the out.vectors. */
960 outvec = talloc_zero_array(req, struct iovec, 4);
961 if (!outvec) {
962 return NT_STATUS_NO_MEMORY;
963 }
964
965 /* 0 is always boilerplate and must
966 * be of size 4 for the length field. */
967
968 outvec[0].iov_base = req->out.nbt_hdr;
969 outvec[0].iov_len = 4;
970 SIVAL(req->out.nbt_hdr, 0, 0);
971
972 if (!dup_smb2_vec3(outvec, &outvec[1], &req->out.vector[i])) {
973 return NT_STATUS_NO_MEMORY;
974 }
975
976 TALLOC_FREE(req->out.vector);
977
978 req->out.vector = outvec;
979
980 req->current_idx = 1;
981 req->out.vector_count = 4;
982
983 out:
984
985 smb2_setup_nbt_length(req->out.vector,
986 req->out.vector_count);
987
988 /* Ensure our final reply matches the interim one. */
989 reqhdr = (uint8_t *)req->out.vector[1].iov_base;
990 SIVAL(reqhdr, SMB2_HDR_FLAGS, flags | SMB2_HDR_FLAG_ASYNC);
991 SBVAL(reqhdr, SMB2_HDR_PID, async_id);
992
993 {
994 const uint8_t *inhdr =
995 (const uint8_t *)req->in.vector[1].iov_base;
996 DEBUG(10,("smbd_smb2_request_pending_queue: opcode[%s] mid %llu "
997 "going async\n",
998 smb2_opcode_name((uint16_t)IVAL(inhdr, SMB2_HDR_OPCODE)),
999 (unsigned long long)async_id ));
1000 }
1001 return NT_STATUS_OK;
1002 }
1003
1004 static NTSTATUS smbd_smb2_request_process_cancel(struct smbd_smb2_request *req)
1005 {
1006 struct smbd_server_connection *sconn = req->sconn;
1007 struct smbd_smb2_request *cur;
1008 const uint8_t *inhdr;
1009 int i = req->current_idx;
1010 uint32_t flags;
1011 uint64_t search_message_id;
1012 uint64_t search_async_id;
1013 uint64_t found_id;
1014
1015 inhdr = (const uint8_t *)req->in.vector[i].iov_base;
1016
1017 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
1018 search_message_id = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
1019 search_async_id = BVAL(inhdr, SMB2_HDR_PID);
1020
1021 /*
1022 * we don't need the request anymore
1023 * cancel requests never have a response
1024 */
1025 DLIST_REMOVE(req->sconn->smb2.requests, req);
1026 TALLOC_FREE(req);
1027
1028 for (cur = sconn->smb2.requests; cur; cur = cur->next) {
1029 const uint8_t *outhdr;
1030 uint64_t message_id;
1031 uint64_t async_id;
1032
1033 i = cur->current_idx;
1034
1035 outhdr = (const uint8_t *)cur->out.vector[i].iov_base;
1036
1037 message_id = BVAL(outhdr, SMB2_HDR_MESSAGE_ID);
1038 async_id = BVAL(outhdr, SMB2_HDR_PID);
1039
1040 if (flags & SMB2_HDR_FLAG_ASYNC) {
1041 if (search_async_id == async_id) {
1042 found_id = async_id;
1043 break;
1044 }
1045 } else {
1046 if (search_message_id == message_id) {
1047 found_id = message_id;
1048 break;
1049 }
1050 }
1051 }
1052
1053 if (cur && cur->subreq) {
1054 inhdr = (const uint8_t *)cur->in.vector[i].iov_base;
1055 DEBUG(10,("smbd_smb2_request_process_cancel: attempting to "
1056 "cancel opcode[%s] mid %llu\n",
1057 smb2_opcode_name((uint16_t)IVAL(inhdr, SMB2_HDR_OPCODE)),
1058 (unsigned long long)found_id ));
1059 tevent_req_cancel(cur->subreq);
1060 }
1061
1062 return NT_STATUS_OK;
1063 }
1064
1065 NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req)
1066 {
1067 const uint8_t *inhdr;
1068 int i = req->current_idx;
1069 uint16_t opcode;
1070 uint32_t flags;
1071 uint64_t mid;
1072 NTSTATUS status;
1073 NTSTATUS session_status;
1074 uint32_t allowed_flags;
1075 NTSTATUS return_value;
1076
1077 inhdr = (const uint8_t *)req->in.vector[i].iov_base;
1078
1079 /* TODO: verify more things */
1080
1081 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
1082 opcode = IVAL(inhdr, SMB2_HDR_OPCODE);
1083 mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
1084 DEBUG(10,("smbd_smb2_request_dispatch: opcode[%s] mid = %llu\n",
1085 smb2_opcode_name(opcode),
1086 (unsigned long long)mid));
1087
1088 allowed_flags = SMB2_HDR_FLAG_CHAINED |
1089 SMB2_HDR_FLAG_SIGNED |
1090 SMB2_HDR_FLAG_DFS;
1091 if (opcode == SMB2_OP_CANCEL) {
1092 allowed_flags |= SMB2_HDR_FLAG_ASYNC;
1093 }
1094 if ((flags & ~allowed_flags) != 0) {
1095 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
1096 }
1097
1098 session_status = smbd_smb2_request_check_session(req);
1099
1100 req->do_signing = false;
1101 if (flags & SMB2_HDR_FLAG_SIGNED) {
1102 if (!NT_STATUS_IS_OK(session_status)) {
1103 return smbd_smb2_request_error(req, session_status);
1104 }
1105
1106 req->do_signing = true;
1107 status = smb2_signing_check_pdu(req->session->session_key,
1108 &req->in.vector[i], 3);
1109 if (!NT_STATUS_IS_OK(status)) {
1110 return smbd_smb2_request_error(req, status);
1111 }
1112 } else if (req->session && req->session->do_signing) {
1113 return smbd_smb2_request_error(req, NT_STATUS_ACCESS_DENIED);
1114 }
1115
1116 if (flags & SMB2_HDR_FLAG_CHAINED) {
1117 /*
1118 * This check is mostly for giving the correct error code
1119 * for compounded requests.
1120 *
1121 * TODO: we may need to move this after the session
1122 * and tcon checks.
1123 */
1124 if (!NT_STATUS_IS_OK(req->next_status)) {
1125 return smbd_smb2_request_error(req, req->next_status);
1126 }
1127 } else {
1128 req->compat_chain_fsp = NULL;
1129 }
1130
1131 switch (opcode) {
1132 case SMB2_OP_NEGPROT:
1133 {
1134 START_PROFILE(smb2_negprot);
1135 return_value = smbd_smb2_request_process_negprot(req);
1136 END_PROFILE(smb2_negprot);
1137 }
1138 break;
1139
1140 case SMB2_OP_SESSSETUP:
1141 {
1142 START_PROFILE(smb2_sesssetup);
1143 return_value = smbd_smb2_request_process_sesssetup(req);
1144 END_PROFILE(smb2_sesssetup);
1145 }
1146 break;
1147
1148 case SMB2_OP_LOGOFF:
1149 if (!NT_STATUS_IS_OK(session_status)) {
1150 return_value = smbd_smb2_request_error(req, session_status);
1151 break;
1152 }
1153
1154 {
1155 START_PROFILE(smb2_logoff);
1156 return_value = smbd_smb2_request_process_logoff(req);
1157 END_PROFILE(smb2_logoff);
1158 }
1159 break;
1160
1161 case SMB2_OP_TCON:
1162 if (!NT_STATUS_IS_OK(session_status)) {
1163 return_value = smbd_smb2_request_error(req, session_status);
1164 break;
1165 }
1166 status = smbd_smb2_request_check_session(req);
1167 if (!NT_STATUS_IS_OK(status)) {
1168 return_value = smbd_smb2_request_error(req, status);
1169 break;
1170 }
1171
1172 {
1173 START_PROFILE(smb2_tcon);
1174 return_value = smbd_smb2_request_process_tcon(req);
1175 END_PROFILE(smb2_tcon);
1176 }
1177 break;
1178
1179 case SMB2_OP_TDIS:
1180 if (!NT_STATUS_IS_OK(session_status)) {
1181 return_value = smbd_smb2_request_error(req, session_status);
1182 break;
1183 }
1184 status = smbd_smb2_request_check_tcon(req);
1185 if (!NT_STATUS_IS_OK(status)) {
1186 return_value = smbd_smb2_request_error(req, status);
1187 break;
1188 }
1189
1190 {
1191 START_PROFILE(smb2_tdis);
1192 return_value = smbd_smb2_request_process_tdis(req);
1193 END_PROFILE(smb2_tdis);
1194 }
1195 break;
1196
1197 case SMB2_OP_CREATE:
1198 if (!NT_STATUS_IS_OK(session_status)) {
1199 return_value = smbd_smb2_request_error(req, session_status);
1200 break;
1201 }
1202 status = smbd_smb2_request_check_tcon(req);
1203 if (!NT_STATUS_IS_OK(status)) {
1204 return_value = smbd_smb2_request_error(req, status);
1205 break;
1206 }
1207
1208 {
1209 START_PROFILE(smb2_create);
1210 return_value = smbd_smb2_request_process_create(req);
1211 END_PROFILE(smb2_create);
1212 }
1213 break;
1214
1215 case SMB2_OP_CLOSE:
1216 if (!NT_STATUS_IS_OK(session_status)) {
1217 return_value = smbd_smb2_request_error(req, session_status);
1218 break;
1219 }
1220 status = smbd_smb2_request_check_tcon(req);
1221 if (!NT_STATUS_IS_OK(status)) {
1222 return_value = smbd_smb2_request_error(req, status);
1223 break;
1224 }
1225
1226 {
1227 START_PROFILE(smb2_close);
1228 return_value = smbd_smb2_request_process_close(req);
1229 END_PROFILE(smb2_close);
1230 }
1231 break;
1232
1233 case SMB2_OP_FLUSH:
1234 if (!NT_STATUS_IS_OK(session_status)) {
1235 return_value = smbd_smb2_request_error(req, session_status);
1236 break;
1237 }
1238 status = smbd_smb2_request_check_tcon(req);
1239 if (!NT_STATUS_IS_OK(status)) {
1240 return_value = smbd_smb2_request_error(req, status);
1241 break;
1242 }
1243
1244 {
1245 START_PROFILE(smb2_flush);
1246 return_value = smbd_smb2_request_process_flush(req);
1247 END_PROFILE(smb2_flush);
1248 }
1249 break;
1250
1251 case SMB2_OP_READ:
1252 if (!NT_STATUS_IS_OK(session_status)) {
1253 return_value = smbd_smb2_request_error(req, session_status);
1254 break;
1255 }
1256 status = smbd_smb2_request_check_tcon(req);
1257 if (!NT_STATUS_IS_OK(status)) {
1258 return_value = smbd_smb2_request_error(req, status);
1259 break;
1260 }
1261
1262 {
1263 START_PROFILE(smb2_read);
1264 return_value = smbd_smb2_request_process_read(req);
1265 END_PROFILE(smb2_read);
1266 }
1267 break;
1268
1269 case SMB2_OP_WRITE:
1270 if (!NT_STATUS_IS_OK(session_status)) {
1271 return_value = smbd_smb2_request_error(req, session_status);
1272 break;
1273 }
1274 status = smbd_smb2_request_check_tcon(req);
1275 if (!NT_STATUS_IS_OK(status)) {
1276 return_value = smbd_smb2_request_error(req, status);
1277 break;
1278 }
1279
1280 {
1281 START_PROFILE(smb2_write);
1282 return_value = smbd_smb2_request_process_write(req);
1283 END_PROFILE(smb2_write);
1284 }
1285 break;
1286
1287 case SMB2_OP_LOCK:
1288 if (!NT_STATUS_IS_OK(session_status)) {
1289 /* Too ugly to live ? JRA. */
1290 if (NT_STATUS_EQUAL(session_status,NT_STATUS_USER_SESSION_DELETED)) {
1291 session_status = NT_STATUS_FILE_CLOSED;
1292 }
1293 return_value = smbd_smb2_request_error(req, session_status);
1294 break;
1295 }
1296 status = smbd_smb2_request_check_tcon(req);
1297 if (!NT_STATUS_IS_OK(status)) {
1298 /* Too ugly to live ? JRA. */
1299 if (NT_STATUS_EQUAL(status,NT_STATUS_NETWORK_NAME_DELETED)) {
1300 status = NT_STATUS_FILE_CLOSED;
1301 }
1302 return_value = smbd_smb2_request_error(req, status);
1303 break;
1304 }
1305
1306 {
1307 START_PROFILE(smb2_lock);
1308 return_value = smbd_smb2_request_process_lock(req);
1309 END_PROFILE(smb2_lock);
1310 }
1311 break;
1312
1313 case SMB2_OP_IOCTL:
1314 if (!NT_STATUS_IS_OK(session_status)) {
1315 return_value = smbd_smb2_request_error(req, session_status);
1316 break;
1317 }
1318 status = smbd_smb2_request_check_tcon(req);
1319 if (!NT_STATUS_IS_OK(status)) {
1320 return_value = smbd_smb2_request_error(req, status);
1321 break;
1322 }
1323
1324 {
1325 START_PROFILE(smb2_ioctl);
1326 return_value = smbd_smb2_request_process_ioctl(req);
1327 END_PROFILE(smb2_ioctl);
1328 }
1329 break;
1330
1331 case SMB2_OP_CANCEL:
1332 {
1333 START_PROFILE(smb2_cancel);
1334 return_value = smbd_smb2_request_process_cancel(req);
1335 END_PROFILE(smb2_cancel);
1336 }
1337 break;
1338
1339 case SMB2_OP_KEEPALIVE:
1340 {START_PROFILE(smb2_keepalive);
1341 return_value = smbd_smb2_request_process_keepalive(req);
1342 END_PROFILE(smb2_keepalive);}
1343 break;
1344
1345 case SMB2_OP_FIND:
1346 if (!NT_STATUS_IS_OK(session_status)) {
1347 return_value = smbd_smb2_request_error(req, session_status);
1348 break;
1349 }
1350 status = smbd_smb2_request_check_tcon(req);
1351 if (!NT_STATUS_IS_OK(status)) {
1352 return_value = smbd_smb2_request_error(req, status);
1353 break;
1354 }
1355
1356 {
1357 START_PROFILE(smb2_find);
1358 return_value = smbd_smb2_request_process_find(req);
1359 END_PROFILE(smb2_find);
1360 }
1361 break;
1362
1363 case SMB2_OP_NOTIFY:
1364 if (!NT_STATUS_IS_OK(session_status)) {
1365 return_value = smbd_smb2_request_error(req, session_status);
1366 break;
1367 }
1368 status = smbd_smb2_request_check_tcon(req);
1369 if (!NT_STATUS_IS_OK(status)) {
1370 return_value = smbd_smb2_request_error(req, status);
1371 break;
1372 }
1373
1374 {
1375 START_PROFILE(smb2_notify);
1376 return_value = smbd_smb2_request_process_notify(req);
1377 END_PROFILE(smb2_notify);
1378 }
1379 break;
1380
1381 case SMB2_OP_GETINFO:
1382 if (!NT_STATUS_IS_OK(session_status)) {
1383 return_value = smbd_smb2_request_error(req, session_status);
1384 break;
1385 }
1386 status = smbd_smb2_request_check_tcon(req);
1387 if (!NT_STATUS_IS_OK(status)) {
1388 return_value = smbd_smb2_request_error(req, status);
1389 break;
1390 }
1391
1392 {
1393 START_PROFILE(smb2_getinfo);
1394 return_value = smbd_smb2_request_process_getinfo(req);
1395 END_PROFILE(smb2_getinfo);
1396 }
1397 break;
1398
1399 case SMB2_OP_SETINFO:
1400 if (!NT_STATUS_IS_OK(session_status)) {
1401 return_value = smbd_smb2_request_error(req, session_status);
1402 break;
1403 }
1404 status = smbd_smb2_request_check_tcon(req);
1405 if (!NT_STATUS_IS_OK(status)) {
1406 return_value = smbd_smb2_request_error(req, status);
1407 break;
1408 }
1409
1410 {
1411 START_PROFILE(smb2_setinfo);
1412 return_value = smbd_smb2_request_process_setinfo(req);
1413 END_PROFILE(smb2_setinfo);
1414 }
1415 break;
1416
1417 case SMB2_OP_BREAK:
1418 if (!NT_STATUS_IS_OK(session_status)) {
1419 return_value = smbd_smb2_request_error(req, session_status);
1420 break;
1421 }
1422 status = smbd_smb2_request_check_tcon(req);
1423 if (!NT_STATUS_IS_OK(status)) {
1424 return_value = smbd_smb2_request_error(req, status);
1425 break;
1426 }
1427
1428 {
1429 START_PROFILE(smb2_break);
1430 return_value = smbd_smb2_request_process_break(req);
1431 END_PROFILE(smb2_break);
1432 }
1433 break;
1434
1435 default:
1436 return_value = smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
1437 break;
1438 }
1439 return return_value;
1440 }
1441
1442 static NTSTATUS smbd_smb2_request_reply(struct smbd_smb2_request *req)
1443 {
1444 struct tevent_req *subreq;
1445 int i = req->current_idx;
1446
1447 req->subreq = NULL;
1448
1449 req->current_idx += 3;
1450
1451 if (req->current_idx < req->out.vector_count) {
1452 /*
1453 * We must process the remaining compound
1454 * SMB2 requests before any new incoming SMB2
1455 * requests. This is because incoming SMB2
1456 * requests may include a cancel for a
1457 * compound request we haven't processed
1458 * yet.
1459 */
1460 struct tevent_immediate *im = tevent_create_immediate(req);
1461 if (!im) {
1462 return NT_STATUS_NO_MEMORY;
1463 }
1464 tevent_schedule_immediate(im,
1465 req->sconn->smb2.event_ctx,
1466 smbd_smb2_request_dispatch_immediate,
1467 req);
1468 return NT_STATUS_OK;
1469 }
1470
1471 smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
1472
1473 /* Set credit for this operation (zero credits if this
1474 is a final reply for an async operation). */
1475 smb2_set_operation_credit(req->sconn,
1476 req->async ? NULL : &req->in.vector[i],
1477 &req->out.vector[i]);
1478
1479 if (req->do_signing) {
1480 NTSTATUS status;
1481 status = smb2_signing_sign_pdu(req->session->session_key,
1482 &req->out.vector[i], 3);
1483 if (!NT_STATUS_IS_OK(status)) {
1484 return status;
1485 }
1486 }
1487
1488 if (DEBUGLEVEL >= 10) {
1489 dbgtext("smbd_smb2_request_reply: sending...\n");
1490 print_req_vectors(req);
1491 }
1492
1493 /* I am a sick, sick man... :-). Sendfile hack ... JRA. */
1494 if (req->out.vector_count == 4 &&
1495 req->out.vector[3].iov_base == NULL &&
1496 req->out.vector[3].iov_len != 0) {
1497 /* Dynamic part is NULL. Chop it off,
1498 We're going to send it via sendfile. */
1499 req->out.vector_count -= 1;
1500 }
1501
1502 subreq = tstream_writev_queue_send(req,
1503 req->sconn->smb2.event_ctx,
1504 req->sconn->smb2.stream,
1505 req->sconn->smb2.send_queue,
1506 req->out.vector,
1507 req->out.vector_count);
1508 if (subreq == NULL) {
1509 return NT_STATUS_NO_MEMORY;
1510 }
1511 tevent_req_set_callback(subreq, smbd_smb2_request_writev_done, req);
1512 /*
1513 * We're done with this request -
1514 * move it off the "being processed" queue.
1515 */
1516 DLIST_REMOVE(req->sconn->smb2.requests, req);
1517
1518 return NT_STATUS_OK;
1519 }
1520
1521 void smbd_smb2_request_dispatch_immediate(struct tevent_context *ctx,
1522 struct tevent_immediate *im,
1523 void *private_data)
1524 {
1525 struct smbd_smb2_request *req = talloc_get_type_abort(private_data,
1526 struct smbd_smb2_request);
1527 struct smbd_server_connection *sconn = req->sconn;
1528 NTSTATUS status;
1529
1530 TALLOC_FREE(im);
1531
1532 if (DEBUGLEVEL >= 10) {
1533 DEBUG(10,("smbd_smb2_request_dispatch_immediate: idx[%d] of %d vectors\n",
1534 req->current_idx, req->in.vector_count));
1535 print_req_vectors(req);
1536 }
1537
1538 status = smbd_smb2_request_dispatch(req);
1539 if (!NT_STATUS_IS_OK(status)) {
1540 smbd_server_connection_terminate(sconn, nt_errstr(status));
1541 return;
1542 }
1543 }
1544
1545 static void smbd_smb2_request_writev_done(struct tevent_req *subreq)
1546 {
1547 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
1548 struct smbd_smb2_request);
1549 struct smbd_server_connection *sconn = req->sconn;
1550 int ret;
1551 int sys_errno;
1552
1553 ret = tstream_writev_queue_recv(subreq, &sys_errno);
1554 TALLOC_FREE(subreq);
1555 TALLOC_FREE(req);
1556 if (ret == -1) {
1557 NTSTATUS status = map_nt_error_from_unix(sys_errno);
1558 DEBUG(2,("smbd_smb2_request_writev_done: client write error %s\n",
1559 nt_errstr(status)));
1560 smbd_server_connection_terminate(sconn, nt_errstr(status));
1561 return;
1562 }
1563 }
1564
1565 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
1566 NTSTATUS status,
1567 DATA_BLOB body, DATA_BLOB *dyn,
1568 const char *location)
1569 {
1570 uint8_t *outhdr;
1571 int i = req->current_idx;
1572 uint32_t next_command_ofs;
1573
1574 DEBUG(10,("smbd_smb2_request_done_ex: "
1575 "idx[%d] status[%s] body[%u] dyn[%s:%u] at %s\n",
1576 i, nt_errstr(status), (unsigned int)body.length,
1577 dyn ? "yes": "no",
1578 (unsigned int)(dyn ? dyn->length : 0),
1579 location));
1580
1581 if (body.length < 2) {
1582 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
1583 }
1584
1585 if ((body.length % 2) != 0) {
1586 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
1587 }
1588
1589 outhdr = (uint8_t *)req->out.vector[i].iov_base;
1590
1591 next_command_ofs = IVAL(outhdr, SMB2_HDR_NEXT_COMMAND);
1592 SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
1593
1594 req->out.vector[i+1].iov_base = (void *)body.data;
1595 req->out.vector[i+1].iov_len = body.length;
1596
1597 if (dyn) {
1598 req->out.vector[i+2].iov_base = (void *)dyn->data;
1599 req->out.vector[i+2].iov_len = dyn->length;
1600 } else {
1601 req->out.vector[i+2].iov_base = NULL;
1602 req->out.vector[i+2].iov_len = 0;
1603 }
1604
1605 /* see if we need to recalculate the offset to the next response */
1606 if (next_command_ofs > 0) {
1607 next_command_ofs = SMB2_HDR_BODY;
1608 next_command_ofs += req->out.vector[i+1].iov_len;
1609 next_command_ofs += req->out.vector[i+2].iov_len;
1610 }
1611
1612 if ((next_command_ofs % 8) != 0) {
1613 size_t pad_size = 8 - (next_command_ofs % 8);
1614 if (req->out.vector[i+2].iov_len == 0) {
1615 /*
1616 * if the dyn buffer is empty
1617 * we can use it to add padding
1618 */
1619 uint8_t *pad;
1620
1621 pad = talloc_zero_array(req->out.vector,
1622 uint8_t, pad_size);
1623 if (pad == NULL) {
1624 return smbd_smb2_request_error(req,
1625 NT_STATUS_NO_MEMORY);
1626 }
1627
1628 req->out.vector[i+2].iov_base = (void *)pad;
1629 req->out.vector[i+2].iov_len = pad_size;
1630 } else {
1631 /*
1632 * For now we copy the dynamic buffer
1633 * and add the padding to the new buffer
1634 */
1635 size_t old_size;
1636 uint8_t *old_dyn;
1637 size_t new_size;
1638 uint8_t *new_dyn;
1639
1640 old_size = req->out.vector[i+2].iov_len;
1641 old_dyn = (uint8_t *)req->out.vector[i+2].iov_base;
1642
1643 new_size = old_size + pad_size;
1644 new_dyn = talloc_zero_array(req->out.vector,
1645 uint8_t, new_size);
1646 if (new_dyn == NULL) {
1647 return smbd_smb2_request_error(req,
1648 NT_STATUS_NO_MEMORY);
1649 }
1650
1651 memcpy(new_dyn, old_dyn, old_size);
1652 memset(new_dyn + old_size, 0, pad_size);
1653
1654 req->out.vector[i+2].iov_base = (void *)new_dyn;
1655 req->out.vector[i+2].iov_len = new_size;
1656 }
1657 next_command_ofs += pad_size;
1658 }
1659
1660 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
1661
1662 return smbd_smb2_request_reply(req);
1663 }
1664
1665 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
1666 NTSTATUS status,
1667 DATA_BLOB *info,
1668 const char *location)
1669 {
1670 DATA_BLOB body;
1671 int i = req->current_idx;
1672 uint8_t *outhdr = (uint8_t *)req->out.vector[i].iov_base;
1673
1674 DEBUG(10,("smbd_smb2_request_error_ex: idx[%d] status[%s] |%s| at %s\n",
1675 i, nt_errstr(status), info ? " +info" : "",
1676 location));
1677
1678 body.data = outhdr + SMB2_HDR_BODY;
1679 body.length = 8;
1680 SSVAL(body.data, 0, 9);
1681
1682 if (info) {
1683 SIVAL(body.data, 0x04, info->length);
1684 } else {
1685 /* Allocated size of req->out.vector[i].iov_base
1686 * *MUST BE* OUTVEC_ALLOC_SIZE. So we have room for
1687 * 1 byte without having to do an alloc.
1688 */
1689 info = talloc_zero_array(req->out.vector,
1690 DATA_BLOB,
1691 1);
1692 if (!info) {
1693 return NT_STATUS_NO_MEMORY;
1694 }
1695 info->data = ((uint8_t *)outhdr) +
1696 OUTVEC_ALLOC_SIZE - 1;
1697 info->length = 1;
1698 SCVAL(info->data, 0, 0);
1699 }
1700
1701 /*
1702 * if a request fails, all other remaining
1703 * compounded requests should fail too
1704 */
1705 req->next_status = NT_STATUS_INVALID_PARAMETER;
1706
1707 return smbd_smb2_request_done_ex(req, status, body, info, __location__);
1708 }
1709
1710
1711 struct smbd_smb2_send_oplock_break_state {
1712 struct smbd_server_connection *sconn;
1713 uint8_t buf[4 + SMB2_HDR_BODY + 0x18];
1714 struct iovec vector;
1715 };
1716
1717 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq);
1718
1719 NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
1720 uint64_t file_id_persistent,
1721 uint64_t file_id_volatile,
1722 uint8_t oplock_level)
1723 {
1724 struct smbd_smb2_send_oplock_break_state *state;
1725 struct tevent_req *subreq;
1726 uint8_t *hdr;
1727 uint8_t *body;
1728
1729 state = talloc(sconn, struct smbd_smb2_send_oplock_break_state);
1730 if (state == NULL) {
1731 return NT_STATUS_NO_MEMORY;
1732 }
1733 state->sconn = sconn;
1734
1735 state->vector.iov_base = (void *)state->buf;
1736 state->vector.iov_len = sizeof(state->buf);
1737
1738 _smb2_setlen(state->buf, sizeof(state->buf) - 4);
1739 hdr = state->buf + 4;
1740 body = hdr + SMB2_HDR_BODY;
1741
1742 SIVAL(hdr, 0, SMB2_MAGIC);
1743 SSVAL(hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
1744 SSVAL(hdr, SMB2_HDR_EPOCH, 0);
1745 SIVAL(hdr, SMB2_HDR_STATUS, 0);
1746 SSVAL(hdr, SMB2_HDR_OPCODE, SMB2_OP_BREAK);
1747 SSVAL(hdr, SMB2_HDR_CREDIT, 0);
1748 SIVAL(hdr, SMB2_HDR_FLAGS, SMB2_HDR_FLAG_REDIRECT);
1749 SIVAL(hdr, SMB2_HDR_NEXT_COMMAND, 0);
1750 SBVAL(hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
1751 SIVAL(hdr, SMB2_HDR_PID, 0);
1752 SIVAL(hdr, SMB2_HDR_TID, 0);
1753 SBVAL(hdr, SMB2_HDR_SESSION_ID, 0);
1754 memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
1755
1756 SSVAL(body, 0x00, 0x18);
1757
1758 SCVAL(body, 0x02, oplock_level);
1759 SCVAL(body, 0x03, 0); /* reserved */
1760 SIVAL(body, 0x04, 0); /* reserved */
1761 SBVAL(body, 0x08, file_id_persistent);
1762 SBVAL(body, 0x10, file_id_volatile);
1763
1764 subreq = tstream_writev_queue_send(state,
1765 sconn->smb2.event_ctx,
1766 sconn->smb2.stream,
1767 sconn->smb2.send_queue,
1768 &state->vector, 1);
1769 if (subreq == NULL) {
1770 return NT_STATUS_NO_MEMORY;
1771 }
1772 tevent_req_set_callback(subreq,
1773 smbd_smb2_oplock_break_writev_done,
1774 state);
1775
1776 return NT_STATUS_OK;
1777 }
1778
1779 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq)
1780 {
1781 struct smbd_smb2_send_oplock_break_state *state =
1782 tevent_req_callback_data(subreq,
1783 struct smbd_smb2_send_oplock_break_state);
1784 struct smbd_server_connection *sconn = state->sconn;
1785 int ret;
1786 int sys_errno;
1787
1788 ret = tstream_writev_queue_recv(subreq, &sys_errno);
1789 TALLOC_FREE(subreq);
1790 if (ret == -1) {
1791 NTSTATUS status = map_nt_error_from_unix(sys_errno);
1792 smbd_server_connection_terminate(sconn, nt_errstr(status));
1793 return;
1794 }
1795
1796 TALLOC_FREE(state);
1797 }
1798
1799 struct smbd_smb2_request_read_state {
1800 size_t missing;
1801 bool asked_for_header;
1802 struct smbd_smb2_request *smb2_req;
1803 };
1804
1805 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1806 void *private_data,
1807 TALLOC_CTX *mem_ctx,
1808 struct iovec **_vector,
1809 size_t *_count);
1810 static void smbd_smb2_request_read_done(struct tevent_req *subreq);
1811
1812 static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx,
1813 struct tevent_context *ev,
1814 struct smbd_server_connection *sconn)
1815 {
1816 struct tevent_req *req;
1817 struct smbd_smb2_request_read_state *state;
1818 struct tevent_req *subreq;
1819
1820 req = tevent_req_create(mem_ctx, &state,
1821 struct smbd_smb2_request_read_state);
1822 if (req == NULL) {
1823 return NULL;
1824 }
1825 state->missing = 0;
1826 state->asked_for_header = false;
1827
1828 state->smb2_req = smbd_smb2_request_allocate(state);
1829 if (tevent_req_nomem(state->smb2_req, req)) {
1830 return tevent_req_post(req, ev);
1831 }
1832 state->smb2_req->sconn = sconn;
1833
1834 subreq = tstream_readv_pdu_queue_send(state, ev, sconn->smb2.stream,
1835 sconn->smb2.recv_queue,
1836 smbd_smb2_request_next_vector,
1837 state);
1838 if (tevent_req_nomem(subreq, req)) {
1839 return tevent_req_post(req, ev);
1840 }
1841 tevent_req_set_callback(subreq, smbd_smb2_request_read_done, req);
1842
1843 return req;
1844 }
1845
1846 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1847 void *private_data,
1848 TALLOC_CTX *mem_ctx,
1849 struct iovec **_vector,
1850 size_t *_count)
1851 {
1852 struct smbd_smb2_request_read_state *state =
1853 talloc_get_type_abort(private_data,
1854 struct smbd_smb2_request_read_state);
1855 struct smbd_smb2_request *req = state->smb2_req;
1856 struct iovec *vector;
1857 int idx = req->in.vector_count;
1858 size_t len = 0;
1859 uint8_t *buf = NULL;
1860
1861 if (req->in.vector_count == 0) {
1862 /*
1863 * first we need to get the NBT header
1864 */
1865 req->in.vector = talloc_array(req, struct iovec,
1866 req->in.vector_count + 1);
1867 if (req->in.vector == NULL) {
1868 return -1;
1869 }
1870 req->in.vector_count += 1;
1871
1872 req->in.vector[idx].iov_base = (void *)req->in.nbt_hdr;
1873 req->in.vector[idx].iov_len = 4;
1874
1875 vector = talloc_array(mem_ctx, struct iovec, 1);
1876 if (vector == NULL) {
1877 return -1;
1878 }
1879
1880 vector[0] = req->in.vector[idx];
1881
1882 *_vector = vector;
1883 *_count = 1;
1884 return 0;
1885 }
1886
1887 if (req->in.vector_count == 1) {
1888 /*
1889 * Now we analyze the NBT header
1890 */
1891 state->missing = smb2_len(req->in.vector[0].iov_base);
1892
1893 if (state->missing == 0) {
1894 /* if there're no remaining bytes, we're done */
1895 *_vector = NULL;
1896 *_count = 0;
1897 return 0;
1898 }
1899
1900 req->in.vector = talloc_realloc(req, req->in.vector,
1901 struct iovec,
1902 req->in.vector_count + 1);
1903 if (req->in.vector == NULL) {
1904 return -1;
1905 }
1906 req->in.vector_count += 1;
1907
1908 if (CVAL(req->in.vector[0].iov_base, 0) != 0) {
1909 /*
1910 * it's a special NBT message,
1911 * so get all remaining bytes
1912 */
1913 len = state->missing;
1914 } else if (state->missing < (SMB2_HDR_BODY + 2)) {
1915 /*
1916 * it's an invalid message, just read what we can get
1917 * and let the caller handle the error
1918 */
1919 len = state->missing;
1920 } else {
1921 /*
1922 * We assume it's a SMB2 request,
1923 * and we first get the header and the
1924 * first 2 bytes (the struct size) of the body
1925 */
1926 len = SMB2_HDR_BODY + 2;
1927
1928 state->asked_for_header = true;
1929 }
1930
1931 state->missing -= len;
1932
1933 buf = talloc_array(req->in.vector, uint8_t, len);
1934 if (buf == NULL) {
1935 return -1;
1936 }
1937
1938 req->in.vector[idx].iov_base = (void *)buf;
1939 req->in.vector[idx].iov_len = len;
1940
1941 vector = talloc_array(mem_ctx, struct iovec, 1);
1942 if (vector == NULL) {
1943 return -1;
1944 }
1945
1946 vector[0] = req->in.vector[idx];
1947
1948 *_vector = vector;
1949 *_count = 1;
1950 return 0;
1951 }
1952
1953 if (state->missing == 0) {
1954 /* if there're no remaining bytes, we're done */
1955 *_vector = NULL;
1956 *_count = 0;
1957 return 0;
1958 }
1959
1960 if (state->asked_for_header) {
1961 const uint8_t *hdr;
1962 size_t full_size;
1963 size_t next_command_ofs;
1964 size_t body_size;
1965 uint8_t *body;
1966 size_t dyn_size;
1967 uint8_t *dyn;
1968 bool invalid = false;
1969
1970 state->asked_for_header = false;
1971
1972 /*
1973 * We got the SMB2 header and the first 2 bytes
1974 * of the body. We fix the size to just the header
1975 * and manually copy the 2 first bytes to the body section
1976 */
1977 req->in.vector[idx-1].iov_len = SMB2_HDR_BODY;
1978 hdr = (const uint8_t *)req->in.vector[idx-1].iov_base;
1979
1980 /* allocate vectors for body and dynamic areas */
1981 req->in.vector = talloc_realloc(req, req->in.vector,
1982 struct iovec,
1983 req->in.vector_count + 2);
1984 if (req->in.vector == NULL) {
1985 return -1;
1986 }
1987 req->in.vector_count += 2;
1988
1989 full_size = state->missing + SMB2_HDR_BODY + 2;
1990 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
1991 body_size = SVAL(hdr, SMB2_HDR_BODY);
1992
1993 if (next_command_ofs != 0) {
1994 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
1995 /*
1996 * this is invalid, just return a zero
1997 * body and let the caller deal with the error
1998 */
1999 invalid = true;
2000 } else if (next_command_ofs > full_size) {
2001 /*
2002 * this is invalid, just return a zero
2003 * body and let the caller deal with the error
2004 */
2005 invalid = true;
2006 } else {
2007 full_size = next_command_ofs;
2008 }
2009 }
2010
2011 if (!invalid) {
2012 if (body_size < 2) {
2013 /*
2014 * this is invalid, just return a zero
2015 * body and let the caller deal with the error
2016 */
2017 invalid = true;
2018 }
2019
2020 if ((body_size % 2) != 0) {
2021 body_size -= 1;
2022 }
2023
2024 if (body_size > (full_size - SMB2_HDR_BODY)) {
2025 /*
2026 * this is invalid, just return a zero
2027 * body and let the caller deal with the error
2028 */
2029 invalid = true;
2030 }
2031 }
2032
2033 if (invalid) {
2034 /* the caller should check this */
2035 body_size = 2;
2036 }
2037
2038 dyn_size = full_size - (SMB2_HDR_BODY + body_size);
2039
2040 state->missing -= (body_size - 2) + dyn_size;
2041
2042 body = talloc_array(req->in.vector, uint8_t, body_size);
2043 if (body == NULL) {
2044 return -1;
2045 }
2046
2047 dyn = talloc_array(req->in.vector, uint8_t, dyn_size);
2048 if (dyn == NULL) {
2049 return -1;
2050 }
2051
2052 req->in.vector[idx].iov_base = (void *)body;
2053 req->in.vector[idx].iov_len = body_size;
2054 req->in.vector[idx+1].iov_base = (void *)dyn;
2055 req->in.vector[idx+1].iov_len = dyn_size;
2056
2057 vector = talloc_array(mem_ctx, struct iovec, 2);
2058 if (vector == NULL) {
2059 return -1;
2060 }
2061
2062 /*
2063 * the first 2 bytes of the body were already fetched
2064 * together with the header
2065 */
2066 memcpy(body, hdr + SMB2_HDR_BODY, 2);
2067 vector[0].iov_base = body + 2;
2068 vector[0].iov_len = body_size - 2;
2069
2070 vector[1] = req->in.vector[idx+1];
2071
2072 *_vector = vector;
2073 *_count = 2;
2074 return 0;
2075 }
2076
2077 /*
2078 * when we endup here, we're looking for a new SMB2 request
2079 * next. And we ask for its header and the first 2 bytes of
2080 * the body (like we did for the first SMB2 request).
2081 */
2082
2083 req->in.vector = talloc_realloc(req, req->in.vector,
2084 struct iovec,
2085 req->in.vector_count + 1);
2086 if (req->in.vector == NULL) {
2087 return -1;
2088 }
2089 req->in.vector_count += 1;
2090
2091 /*
2092 * We assume it's a SMB2 request,
2093 * and we first get the header and the
2094 * first 2 bytes (the struct size) of the body
2095 */
2096 len = SMB2_HDR_BODY + 2;
2097
2098 if (len > state->missing) {
2099 /* let the caller handle the error */
2100 len = state->missing;
2101 }
2102
2103 state->missing -= len;
2104 state->asked_for_header = true;
2105
2106 buf = talloc_array(req->in.vector, uint8_t, len);
2107 if (buf == NULL) {
2108 return -1;
2109 }
2110
2111 req->in.vector[idx].iov_base = (void *)buf;
2112 req->in.vector[idx].iov_len = len;
2113
2114 vector = talloc_array(mem_ctx, struct iovec, 1);
2115 if (vector == NULL) {
2116 return -1;
2117 }
2118
2119 vector[0] = req->in.vector[idx];
2120
2121 *_vector = vector;
2122 *_count = 1;
2123 return 0;
2124 }
2125
2126 static void smbd_smb2_request_read_done(struct tevent_req *subreq)
2127 {
2128 struct tevent_req *req =
2129 tevent_req_callback_data(subreq,
2130 struct tevent_req);
2131 int ret;
2132 int sys_errno;
2133 NTSTATUS status;
2134
2135 ret = tstream_readv_pdu_queue_recv(subreq, &sys_errno);
2136 if (ret == -1) {
2137 status = map_nt_error_from_unix(sys_errno);
2138 tevent_req_nterror(req, status);
2139 return;
2140 }
2141
2142 tevent_req_done(req);
2143 }
2144
2145 static NTSTATUS smbd_smb2_request_read_recv(struct tevent_req *req,
2146 TALLOC_CTX *mem_ctx,
2147 struct smbd_smb2_request **_smb2_req)
2148 {
2149 struct smbd_smb2_request_read_state *state =
2150 tevent_req_data(req,
2151 struct smbd_smb2_request_read_state);
2152 NTSTATUS status;
2153
2154 if (tevent_req_is_nterror(req, &status)) {
2155 tevent_req_received(req);
2156 return status;
2157 }
2158
2159 talloc_steal(mem_ctx, state->smb2_req->mem_pool);
2160 *_smb2_req = state->smb2_req;
2161 tevent_req_received(req);
2162 return NT_STATUS_OK;
2163 }
2164
2165 static void smbd_smb2_request_incoming(struct tevent_req *subreq);
2166
2167 void smbd_smb2_first_negprot(struct smbd_server_connection *sconn,
2168 const uint8_t *inbuf, size_t size)
2169 {
2170 NTSTATUS status;
2171 struct smbd_smb2_request *req = NULL;
2172 struct tevent_req *subreq;
2173
2174 DEBUG(10,("smbd_smb2_first_negprot: packet length %u\n",
2175 (unsigned int)size));
2176
2177 status = smbd_initialize_smb2(sconn);
2178 if (!NT_STATUS_IS_OK(status)) {
2179 smbd_server_connection_terminate(sconn, nt_errstr(status));
2180 return;
2181 }
2182
2183 status = smbd_smb2_request_create(sconn, inbuf, size, &req);
2184 if (!NT_STATUS_IS_OK(status)) {
2185 smbd_server_connection_terminate(sconn, nt_errstr(status));
2186 return;
2187 }
2188
2189 status = smbd_smb2_request_setup_out(req);
2190 if (!NT_STATUS_IS_OK(status)) {
2191 smbd_server_connection_terminate(sconn, nt_errstr(status));
2192 return;
2193 }
2194
2195 status = smbd_smb2_request_dispatch(req);
2196 if (!NT_STATUS_IS_OK(status)) {
2197 smbd_server_connection_terminate(sconn, nt_errstr(status));
2198 return;
2199 }
2200
2201 /* ask for the next request */
2202 subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
2203 if (subreq == NULL) {
2204 smbd_server_connection_terminate(sconn, "no memory for reading");
2205 return;
2206 }
2207 tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
2208 }
2209
2210 static void smbd_smb2_request_incoming(struct tevent_req *subreq)
2211 {
2212 struct smbd_server_connection *sconn = tevent_req_callback_data(subreq,
2213 struct smbd_server_connection);
2214 NTSTATUS status;
2215 struct smbd_smb2_request *req = NULL;
2216
2217 status = smbd_smb2_request_read_recv(subreq, sconn, &req);
2218 TALLOC_FREE(subreq);
2219 if (!NT_STATUS_IS_OK(status)) {
2220 DEBUG(2,("smbd_smb2_request_incoming: client read error %s\n",
2221 nt_errstr(status)));
2222 smbd_server_connection_terminate(sconn, nt_errstr(status));
2223 return;
2224 }
2225
2226 if (req->in.nbt_hdr[0] != 0x00) {
2227 DEBUG(1,("smbd_smb2_request_incoming: ignore NBT[0x%02X] msg\n",
2228 req->in.nbt_hdr[0]));
2229 TALLOC_FREE(req);
2230 goto next;
2231 }
2232
2233 req->current_idx = 1;
2234
2235 DEBUG(10,("smbd_smb2_request_incoming: idx[%d] of %d vectors\n",
2236 req->current_idx, req->in.vector_count));
2237
2238 status = smbd_smb2_request_validate(req);
2239 if (!NT_STATUS_IS_OK(status)) {
2240 smbd_server_connection_terminate(sconn, nt_errstr(status));
2241 return;
2242 }
2243
2244 status = smbd_smb2_request_setup_out(req);
2245 if (!NT_STATUS_IS_OK(status)) {
2246 smbd_server_connection_terminate(sconn, nt_errstr(status));
2247 return;
2248 }
2249
2250 status = smbd_smb2_request_dispatch(req);
2251 if (!NT_STATUS_IS_OK(status)) {
2252 smbd_server_connection_terminate(sconn, nt_errstr(status));
2253 return;
2254 }
2255
2256 next:
2257 /* ask for the next request (this constructs the main loop) */
2258 subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
2259 if (subreq == NULL) {
2260 smbd_server_connection_terminate(sconn, "no memory for reading");
2261 return;
2262 }
2263 tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
2264 }
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