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libsmbconf: Document smbconf_transaction_cancel().
[Samba.git] / source3 / smbd / smb2_server.c
blob7cbe90a77396792aa2925e940c67902bdff52087
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->do_signing = req->do_signing;
669 newreq->current_idx = req->current_idx;
670 newreq->async = false;
671 newreq->cancelled = false;
672
673 outvec = talloc_zero_array(newreq, struct iovec, count);
674 if (!outvec) {
675 TALLOC_FREE(newreq);
676 return NULL;
677 }
678 newreq->out.vector = outvec;
679 newreq->out.vector_count = count;
680
681 /* Setup the outvec's identically to req. */
682 outvec[0].iov_base = newreq->out.nbt_hdr;
683 outvec[0].iov_len = 4;
684 memcpy(newreq->out.nbt_hdr, req->out.nbt_hdr, 4);
685
686 /* Setup the vectors identically to the ones in req. */
687 for (i = 1; i < count; i += 3) {
688 if (!dup_smb2_vec3(outvec, &outvec[i], &req->out.vector[i])) {
689 break;
690 }
691 }
692
693 if (i < count) {
694 /* Alloc failed. */
695 TALLOC_FREE(newreq);
696 return NULL;
697 }
698
699 smb2_setup_nbt_length(newreq->out.vector,
700 newreq->out.vector_count);
701
702 return newreq;
703 }
704
705 static void smbd_smb2_request_writev_done(struct tevent_req *subreq);
706
707 static NTSTATUS smb2_send_async_interim_response(const struct smbd_smb2_request *req)
708 {
709 int i = 0;
710 uint8_t *outhdr = NULL;
711 struct smbd_smb2_request *nreq = NULL;
712
713 /* Create a new smb2 request we'll use
714 for the interim return. */
715 nreq = dup_smb2_req(req);
716 if (!nreq) {
717 return NT_STATUS_NO_MEMORY;
718 }
719
720 /* Lose the last 3 out vectors. They're the
721 ones we'll be using for the async reply. */
722 nreq->out.vector_count -= 3;
723
724 smb2_setup_nbt_length(nreq->out.vector,
725 nreq->out.vector_count);
726
727 /* Step back to the previous reply. */
728 i = nreq->current_idx - 3;
729 outhdr = (uint8_t *)nreq->out.vector[i].iov_base;
730 /* And end the chain. */
731 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, 0);
732
733 /* Calculate outgoing credits */
734 smb2_calculate_credits(req, nreq);
735
736 /* Re-sign if needed. */
737 if (nreq->do_signing) {
738 NTSTATUS status;
739 status = smb2_signing_sign_pdu(nreq->session->session_key,
740 &nreq->out.vector[i], 3);
741 if (!NT_STATUS_IS_OK(status)) {
742 return status;
743 }
744 }
745 if (DEBUGLEVEL >= 10) {
746 dbgtext("smb2_send_async_interim_response: nreq->current_idx = %u\n",
747 (unsigned int)nreq->current_idx );
748 dbgtext("smb2_send_async_interim_response: returning %u vectors\n",
749 (unsigned int)nreq->out.vector_count );
750 print_req_vectors(nreq);
751 }
752 nreq->subreq = tstream_writev_queue_send(nreq,
753 nreq->sconn->smb2.event_ctx,
754 nreq->sconn->smb2.stream,
755 nreq->sconn->smb2.send_queue,
756 nreq->out.vector,
757 nreq->out.vector_count);
758
759 if (nreq->subreq == NULL) {
760 return NT_STATUS_NO_MEMORY;
761 }
762
763 tevent_req_set_callback(nreq->subreq,
764 smbd_smb2_request_writev_done,
765 nreq);
766
767 return NT_STATUS_OK;
768 }
769
770 struct smbd_smb2_request_pending_state {
771 struct smbd_server_connection *sconn;
772 uint8_t buf[4 + SMB2_HDR_BODY + 0x08 + 1];
773 struct iovec vector[3];
774 };
775
776 static void smbd_smb2_request_pending_writev_done(struct tevent_req *subreq)
777 {
778 struct smbd_smb2_request_pending_state *state =
779 tevent_req_callback_data(subreq,
780 struct smbd_smb2_request_pending_state);
781 struct smbd_server_connection *sconn = state->sconn;
782 int ret;
783 int sys_errno;
784
785 ret = tstream_writev_queue_recv(subreq, &sys_errno);
786 TALLOC_FREE(subreq);
787 if (ret == -1) {
788 NTSTATUS status = map_nt_error_from_unix(sys_errno);
789 smbd_server_connection_terminate(sconn, nt_errstr(status));
790 return;
791 }
792
793 TALLOC_FREE(state);
794 }
795
796 NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req,
797 struct tevent_req *subreq)
798 {
799 NTSTATUS status;
800 struct smbd_smb2_request_pending_state *state = NULL;
801 int i = req->current_idx;
802 uint8_t *reqhdr = NULL;
803 uint8_t *hdr = NULL;
804 uint8_t *body = NULL;
805 uint32_t flags = 0;
806 uint64_t message_id = 0;
807 uint64_t async_id = 0;
808 struct iovec *outvec = NULL;
809
810 if (!tevent_req_is_in_progress(subreq)) {
811 return NT_STATUS_OK;
812 }
813
814 req->subreq = subreq;
815 subreq = NULL;
816
817 if (req->async) {
818 /* We're already async. */
819 return NT_STATUS_OK;
820 }
821
822 if (req->in.vector_count > i + 3) {
823 /*
824 * We're trying to go async in a compound
825 * request chain. This is not allowed.
826 * Cancel the outstanding request.
827 */
828 tevent_req_cancel(req->subreq);
829 return smbd_smb2_request_error(req,
830 NT_STATUS_INSUFFICIENT_RESOURCES);
831 }
832
833 if (DEBUGLEVEL >= 10) {
834 dbgtext("smbd_smb2_request_pending_queue: req->current_idx = %u\n",
835 (unsigned int)req->current_idx );
836 print_req_vectors(req);
837 }
838
839 if (req->out.vector_count > 4) {
840 /* This is a compound reply. We
841 * must do an interim response
842 * followed by the async response
843 * to match W2K8R2.
844 */
845 status = smb2_send_async_interim_response(req);
846 if (!NT_STATUS_IS_OK(status)) {
847 return status;
848 }
849 }
850
851 /* Don't return an intermediate packet on a pipe read/write. */
852 if (req->tcon && req->tcon->compat_conn && IS_IPC(req->tcon->compat_conn)) {
853 return NT_STATUS_OK;
854 }
855
856 reqhdr = (uint8_t *)req->out.vector[i].iov_base;
857 flags = (IVAL(reqhdr, SMB2_HDR_FLAGS) & ~SMB2_HDR_FLAG_CHAINED);
858 message_id = BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
859 async_id = message_id; /* keep it simple for now... */
860
861 /*
862 * What we send is identical to a smbd_smb2_request_error
863 * packet with an error status of STATUS_PENDING. Make use
864 * of this fact sometime when refactoring. JRA.
865 */
866
867 state = talloc_zero(req->sconn, struct smbd_smb2_request_pending_state);
868 if (state == NULL) {
869 return NT_STATUS_NO_MEMORY;
870 }
871 state->sconn = req->sconn;
872
873 state->vector[0].iov_base = (void *)state->buf;
874 state->vector[0].iov_len = 4;
875
876 state->vector[1].iov_base = state->buf + 4;
877 state->vector[1].iov_len = SMB2_HDR_BODY;
878
879 state->vector[2].iov_base = state->buf + 4 + SMB2_HDR_BODY;
880 state->vector[2].iov_len = 9;
881
882 smb2_setup_nbt_length(state->vector, 3);
883
884 hdr = (uint8_t *)state->vector[1].iov_base;
885 body = (uint8_t *)state->vector[2].iov_base;
886
887 SIVAL(hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
888 SSVAL(hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
889 SSVAL(hdr, SMB2_HDR_EPOCH, 0);
890 SIVAL(hdr, SMB2_HDR_STATUS, NT_STATUS_V(STATUS_PENDING));
891 SSVAL(hdr, SMB2_HDR_OPCODE, SVAL(reqhdr, SMB2_HDR_OPCODE));
892
893 SIVAL(hdr, SMB2_HDR_FLAGS, flags | SMB2_HDR_FLAG_ASYNC);
894 SIVAL(hdr, SMB2_HDR_NEXT_COMMAND, 0);
895 SBVAL(hdr, SMB2_HDR_MESSAGE_ID, message_id);
896 SBVAL(hdr, SMB2_HDR_PID, async_id);
897 SBVAL(hdr, SMB2_HDR_SESSION_ID,
898 BVAL(reqhdr, SMB2_HDR_SESSION_ID));
899 memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
900
901 SSVAL(body, 0x00, 0x08 + 1);
902
903 SCVAL(body, 0x02, 0);
904 SCVAL(body, 0x03, 0);
905 SIVAL(body, 0x04, 0);
906 /* Match W2K8R2... */
907 SCVAL(body, 0x08, 0x21);
908
909 /* Ensure we correctly go through crediting. Grant
910 the credits now, and zero credits on the final
911 response. */
912 smb2_set_operation_credit(req->sconn,
913 &req->in.vector[i],
914 &state->vector[1]);
915
916 if (req->do_signing) {
917 status = smb2_signing_sign_pdu(req->session->session_key,
918 state->vector, 3);
919 if (!NT_STATUS_IS_OK(status)) {
920 return status;
921 }
922 }
923
924 subreq = tstream_writev_queue_send(state,
925 req->sconn->smb2.event_ctx,
926 req->sconn->smb2.stream,
927 req->sconn->smb2.send_queue,
928 state->vector,
929 3);
930
931 if (subreq == NULL) {
932 return NT_STATUS_NO_MEMORY;
933 }
934
935 tevent_req_set_callback(subreq,
936 smbd_smb2_request_pending_writev_done,
937 state);
938
939 /* Note we're going async with this request. */
940 req->async = true;
941
942 /*
943 * Now manipulate req so that the outstanding async request
944 * is the only one left in the struct smbd_smb2_request.
945 */
946
947 if (req->current_idx == 1) {
948 /* There was only one. */
949 goto out;
950 }
951
952 /* Re-arrange the in.vectors. */
953 req->in.vector[1] = req->in.vector[i];
954 req->in.vector[2] = req->in.vector[i+1];
955 req->in.vector[3] = req->in.vector[i+2];
956 req->in.vector_count = 4;
957 /* Reset the new in size. */
958 smb2_setup_nbt_length(req->in.vector, 4);
959
960 /* Now recreate the out.vectors. */
961 outvec = talloc_zero_array(req, struct iovec, 4);
962 if (!outvec) {
963 return NT_STATUS_NO_MEMORY;
964 }
965
966 /* 0 is always boilerplate and must
967 * be of size 4 for the length field. */
968
969 outvec[0].iov_base = req->out.nbt_hdr;
970 outvec[0].iov_len = 4;
971 SIVAL(req->out.nbt_hdr, 0, 0);
972
973 if (!dup_smb2_vec3(outvec, &outvec[1], &req->out.vector[i])) {
974 return NT_STATUS_NO_MEMORY;
975 }
976
977 TALLOC_FREE(req->out.vector);
978
979 req->out.vector = outvec;
980
981 req->current_idx = 1;
982 req->out.vector_count = 4;
983
984 out:
985
986 smb2_setup_nbt_length(req->out.vector,
987 req->out.vector_count);
988
989 /* Ensure our final reply matches the interim one. */
990 reqhdr = (uint8_t *)req->out.vector[1].iov_base;
991 SIVAL(reqhdr, SMB2_HDR_FLAGS, flags | SMB2_HDR_FLAG_ASYNC);
992 SBVAL(reqhdr, SMB2_HDR_PID, async_id);
993
994 {
995 const uint8_t *inhdr =
996 (const uint8_t *)req->in.vector[1].iov_base;
997 DEBUG(10,("smbd_smb2_request_pending_queue: opcode[%s] mid %llu "
998 "going async\n",
999 smb2_opcode_name((uint16_t)IVAL(inhdr, SMB2_HDR_OPCODE)),
1000 (unsigned long long)async_id ));
1001 }
1002 return NT_STATUS_OK;
1003 }
1004
1005 static NTSTATUS smbd_smb2_request_process_cancel(struct smbd_smb2_request *req)
1006 {
1007 struct smbd_server_connection *sconn = req->sconn;
1008 struct smbd_smb2_request *cur;
1009 const uint8_t *inhdr;
1010 int i = req->current_idx;
1011 uint32_t flags;
1012 uint64_t search_message_id;
1013 uint64_t search_async_id;
1014 uint64_t found_id;
1015
1016 inhdr = (const uint8_t *)req->in.vector[i].iov_base;
1017
1018 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
1019 search_message_id = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
1020 search_async_id = BVAL(inhdr, SMB2_HDR_PID);
1021
1022 /*
1023 * we don't need the request anymore
1024 * cancel requests never have a response
1025 */
1026 DLIST_REMOVE(req->sconn->smb2.requests, req);
1027 TALLOC_FREE(req);
1028
1029 for (cur = sconn->smb2.requests; cur; cur = cur->next) {
1030 const uint8_t *outhdr;
1031 uint64_t message_id;
1032 uint64_t async_id;
1033
1034 i = cur->current_idx;
1035
1036 outhdr = (const uint8_t *)cur->out.vector[i].iov_base;
1037
1038 message_id = BVAL(outhdr, SMB2_HDR_MESSAGE_ID);
1039 async_id = BVAL(outhdr, SMB2_HDR_PID);
1040
1041 if (flags & SMB2_HDR_FLAG_ASYNC) {
1042 if (search_async_id == async_id) {
1043 found_id = async_id;
1044 break;
1045 }
1046 } else {
1047 if (search_message_id == message_id) {
1048 found_id = message_id;
1049 break;
1050 }
1051 }
1052 }
1053
1054 if (cur && cur->subreq) {
1055 inhdr = (const uint8_t *)cur->in.vector[i].iov_base;
1056 DEBUG(10,("smbd_smb2_request_process_cancel: attempting to "
1057 "cancel opcode[%s] mid %llu\n",
1058 smb2_opcode_name((uint16_t)IVAL(inhdr, SMB2_HDR_OPCODE)),
1059 (unsigned long long)found_id ));
1060 tevent_req_cancel(cur->subreq);
1061 }
1062
1063 return NT_STATUS_OK;
1064 }
1065
1066 NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req)
1067 {
1068 const uint8_t *inhdr;
1069 int i = req->current_idx;
1070 uint16_t opcode;
1071 uint32_t flags;
1072 uint64_t mid;
1073 NTSTATUS status;
1074 NTSTATUS session_status;
1075 uint32_t allowed_flags;
1076 NTSTATUS return_value;
1077
1078 inhdr = (const uint8_t *)req->in.vector[i].iov_base;
1079
1080 /* TODO: verify more things */
1081
1082 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
1083 opcode = IVAL(inhdr, SMB2_HDR_OPCODE);
1084 mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
1085 DEBUG(10,("smbd_smb2_request_dispatch: opcode[%s] mid = %llu\n",
1086 smb2_opcode_name(opcode),
1087 (unsigned long long)mid));
1088
1089 allowed_flags = SMB2_HDR_FLAG_CHAINED |
1090 SMB2_HDR_FLAG_SIGNED |
1091 SMB2_HDR_FLAG_DFS;
1092 if (opcode == SMB2_OP_CANCEL) {
1093 allowed_flags |= SMB2_HDR_FLAG_ASYNC;
1094 }
1095 if ((flags & ~allowed_flags) != 0) {
1096 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
1097 }
1098
1099 session_status = smbd_smb2_request_check_session(req);
1100
1101 req->do_signing = false;
1102 if (flags & SMB2_HDR_FLAG_SIGNED) {
1103 if (!NT_STATUS_IS_OK(session_status)) {
1104 return smbd_smb2_request_error(req, session_status);
1105 }
1106
1107 req->do_signing = true;
1108 status = smb2_signing_check_pdu(req->session->session_key,
1109 &req->in.vector[i], 3);
1110 if (!NT_STATUS_IS_OK(status)) {
1111 return smbd_smb2_request_error(req, status);
1112 }
1113 } else if (req->session && req->session->do_signing) {
1114 return smbd_smb2_request_error(req, NT_STATUS_ACCESS_DENIED);
1115 }
1116
1117 if (flags & SMB2_HDR_FLAG_CHAINED) {
1118 /*
1119 * This check is mostly for giving the correct error code
1120 * for compounded requests.
1121 *
1122 * TODO: we may need to move this after the session
1123 * and tcon checks.
1124 */
1125 if (!NT_STATUS_IS_OK(req->next_status)) {
1126 return smbd_smb2_request_error(req, req->next_status);
1127 }
1128 } else {
1129 req->compat_chain_fsp = NULL;
1130 }
1131
1132 switch (opcode) {
1133 case SMB2_OP_NEGPROT:
1134 {
1135 START_PROFILE(smb2_negprot);
1136 return_value = smbd_smb2_request_process_negprot(req);
1137 END_PROFILE(smb2_negprot);
1138 }
1139 break;
1140
1141 case SMB2_OP_SESSSETUP:
1142 {
1143 START_PROFILE(smb2_sesssetup);
1144 return_value = smbd_smb2_request_process_sesssetup(req);
1145 END_PROFILE(smb2_sesssetup);
1146 }
1147 break;
1148
1149 case SMB2_OP_LOGOFF:
1150 if (!NT_STATUS_IS_OK(session_status)) {
1151 return_value = smbd_smb2_request_error(req, session_status);
1152 break;
1153 }
1154
1155 {
1156 START_PROFILE(smb2_logoff);
1157 return_value = smbd_smb2_request_process_logoff(req);
1158 END_PROFILE(smb2_logoff);
1159 }
1160 break;
1161
1162 case SMB2_OP_TCON:
1163 if (!NT_STATUS_IS_OK(session_status)) {
1164 return_value = smbd_smb2_request_error(req, session_status);
1165 break;
1166 }
1167 status = smbd_smb2_request_check_session(req);
1168 if (!NT_STATUS_IS_OK(status)) {
1169 return_value = smbd_smb2_request_error(req, status);
1170 break;
1171 }
1172
1173 {
1174 START_PROFILE(smb2_tcon);
1175 return_value = smbd_smb2_request_process_tcon(req);
1176 END_PROFILE(smb2_tcon);
1177 }
1178 break;
1179
1180 case SMB2_OP_TDIS:
1181 if (!NT_STATUS_IS_OK(session_status)) {
1182 return_value = smbd_smb2_request_error(req, session_status);
1183 break;
1184 }
1185 status = smbd_smb2_request_check_tcon(req);
1186 if (!NT_STATUS_IS_OK(status)) {
1187 return_value = smbd_smb2_request_error(req, status);
1188 break;
1189 }
1190
1191 {
1192 START_PROFILE(smb2_tdis);
1193 return_value = smbd_smb2_request_process_tdis(req);
1194 END_PROFILE(smb2_tdis);
1195 }
1196 break;
1197
1198 case SMB2_OP_CREATE:
1199 if (!NT_STATUS_IS_OK(session_status)) {
1200 return_value = smbd_smb2_request_error(req, session_status);
1201 break;
1202 }
1203 status = smbd_smb2_request_check_tcon(req);
1204 if (!NT_STATUS_IS_OK(status)) {
1205 return_value = smbd_smb2_request_error(req, status);
1206 break;
1207 }
1208
1209 {
1210 START_PROFILE(smb2_create);
1211 return_value = smbd_smb2_request_process_create(req);
1212 END_PROFILE(smb2_create);
1213 }
1214 break;
1215
1216 case SMB2_OP_CLOSE:
1217 if (!NT_STATUS_IS_OK(session_status)) {
1218 return_value = smbd_smb2_request_error(req, session_status);
1219 break;
1220 }
1221 status = smbd_smb2_request_check_tcon(req);
1222 if (!NT_STATUS_IS_OK(status)) {
1223 return_value = smbd_smb2_request_error(req, status);
1224 break;
1225 }
1226
1227 {
1228 START_PROFILE(smb2_close);
1229 return_value = smbd_smb2_request_process_close(req);
1230 END_PROFILE(smb2_close);
1231 }
1232 break;
1233
1234 case SMB2_OP_FLUSH:
1235 if (!NT_STATUS_IS_OK(session_status)) {
1236 return_value = smbd_smb2_request_error(req, session_status);
1237 break;
1238 }
1239 status = smbd_smb2_request_check_tcon(req);
1240 if (!NT_STATUS_IS_OK(status)) {
1241 return_value = smbd_smb2_request_error(req, status);
1242 break;
1243 }
1244
1245 {
1246 START_PROFILE(smb2_flush);
1247 return_value = smbd_smb2_request_process_flush(req);
1248 END_PROFILE(smb2_flush);
1249 }
1250 break;
1251
1252 case SMB2_OP_READ:
1253 if (!NT_STATUS_IS_OK(session_status)) {
1254 return_value = smbd_smb2_request_error(req, session_status);
1255 break;
1256 }
1257 status = smbd_smb2_request_check_tcon(req);
1258 if (!NT_STATUS_IS_OK(status)) {
1259 return_value = smbd_smb2_request_error(req, status);
1260 break;
1261 }
1262
1263 {
1264 START_PROFILE(smb2_read);
1265 return_value = smbd_smb2_request_process_read(req);
1266 END_PROFILE(smb2_read);
1267 }
1268 break;
1269
1270 case SMB2_OP_WRITE:
1271 if (!NT_STATUS_IS_OK(session_status)) {
1272 return_value = smbd_smb2_request_error(req, session_status);
1273 break;
1274 }
1275 status = smbd_smb2_request_check_tcon(req);
1276 if (!NT_STATUS_IS_OK(status)) {
1277 return_value = smbd_smb2_request_error(req, status);
1278 break;
1279 }
1280
1281 {
1282 START_PROFILE(smb2_write);
1283 return_value = smbd_smb2_request_process_write(req);
1284 END_PROFILE(smb2_write);
1285 }
1286 break;
1287
1288 case SMB2_OP_LOCK:
1289 if (!NT_STATUS_IS_OK(session_status)) {
1290 /* Too ugly to live ? JRA. */
1291 if (NT_STATUS_EQUAL(session_status,NT_STATUS_USER_SESSION_DELETED)) {
1292 session_status = NT_STATUS_FILE_CLOSED;
1293 }
1294 return_value = smbd_smb2_request_error(req, session_status);
1295 break;
1296 }
1297 status = smbd_smb2_request_check_tcon(req);
1298 if (!NT_STATUS_IS_OK(status)) {
1299 /* Too ugly to live ? JRA. */
1300 if (NT_STATUS_EQUAL(status,NT_STATUS_NETWORK_NAME_DELETED)) {
1301 status = NT_STATUS_FILE_CLOSED;
1302 }
1303 return_value = smbd_smb2_request_error(req, status);
1304 break;
1305 }
1306
1307 {
1308 START_PROFILE(smb2_lock);
1309 return_value = smbd_smb2_request_process_lock(req);
1310 END_PROFILE(smb2_lock);
1311 }
1312 break;
1313
1314 case SMB2_OP_IOCTL:
1315 if (!NT_STATUS_IS_OK(session_status)) {
1316 return_value = smbd_smb2_request_error(req, session_status);
1317 break;
1318 }
1319 status = smbd_smb2_request_check_tcon(req);
1320 if (!NT_STATUS_IS_OK(status)) {
1321 return_value = smbd_smb2_request_error(req, status);
1322 break;
1323 }
1324
1325 {
1326 START_PROFILE(smb2_ioctl);
1327 return_value = smbd_smb2_request_process_ioctl(req);
1328 END_PROFILE(smb2_ioctl);
1329 }
1330 break;
1331
1332 case SMB2_OP_CANCEL:
1333 {
1334 START_PROFILE(smb2_cancel);
1335 return_value = smbd_smb2_request_process_cancel(req);
1336 END_PROFILE(smb2_cancel);
1337 }
1338 break;
1339
1340 case SMB2_OP_KEEPALIVE:
1341 {START_PROFILE(smb2_keepalive);
1342 return_value = smbd_smb2_request_process_keepalive(req);
1343 END_PROFILE(smb2_keepalive);}
1344 break;
1345
1346 case SMB2_OP_FIND:
1347 if (!NT_STATUS_IS_OK(session_status)) {
1348 return_value = smbd_smb2_request_error(req, session_status);
1349 break;
1350 }
1351 status = smbd_smb2_request_check_tcon(req);
1352 if (!NT_STATUS_IS_OK(status)) {
1353 return_value = smbd_smb2_request_error(req, status);
1354 break;
1355 }
1356
1357 {
1358 START_PROFILE(smb2_find);
1359 return_value = smbd_smb2_request_process_find(req);
1360 END_PROFILE(smb2_find);
1361 }
1362 break;
1363
1364 case SMB2_OP_NOTIFY:
1365 if (!NT_STATUS_IS_OK(session_status)) {
1366 return_value = smbd_smb2_request_error(req, session_status);
1367 break;
1368 }
1369 status = smbd_smb2_request_check_tcon(req);
1370 if (!NT_STATUS_IS_OK(status)) {
1371 return_value = smbd_smb2_request_error(req, status);
1372 break;
1373 }
1374
1375 {
1376 START_PROFILE(smb2_notify);
1377 return_value = smbd_smb2_request_process_notify(req);
1378 END_PROFILE(smb2_notify);
1379 }
1380 break;
1381
1382 case SMB2_OP_GETINFO:
1383 if (!NT_STATUS_IS_OK(session_status)) {
1384 return_value = smbd_smb2_request_error(req, session_status);
1385 break;
1386 }
1387 status = smbd_smb2_request_check_tcon(req);
1388 if (!NT_STATUS_IS_OK(status)) {
1389 return_value = smbd_smb2_request_error(req, status);
1390 break;
1391 }
1392
1393 {
1394 START_PROFILE(smb2_getinfo);
1395 return_value = smbd_smb2_request_process_getinfo(req);
1396 END_PROFILE(smb2_getinfo);
1397 }
1398 break;
1399
1400 case SMB2_OP_SETINFO:
1401 if (!NT_STATUS_IS_OK(session_status)) {
1402 return_value = smbd_smb2_request_error(req, session_status);
1403 break;
1404 }
1405 status = smbd_smb2_request_check_tcon(req);
1406 if (!NT_STATUS_IS_OK(status)) {
1407 return_value = smbd_smb2_request_error(req, status);
1408 break;
1409 }
1410
1411 {
1412 START_PROFILE(smb2_setinfo);
1413 return_value = smbd_smb2_request_process_setinfo(req);
1414 END_PROFILE(smb2_setinfo);
1415 }
1416 break;
1417
1418 case SMB2_OP_BREAK:
1419 if (!NT_STATUS_IS_OK(session_status)) {
1420 return_value = smbd_smb2_request_error(req, session_status);
1421 break;
1422 }
1423 status = smbd_smb2_request_check_tcon(req);
1424 if (!NT_STATUS_IS_OK(status)) {
1425 return_value = smbd_smb2_request_error(req, status);
1426 break;
1427 }
1428
1429 {
1430 START_PROFILE(smb2_break);
1431 return_value = smbd_smb2_request_process_break(req);
1432 END_PROFILE(smb2_break);
1433 }
1434 break;
1435
1436 default:
1437 return_value = smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
1438 break;
1439 }
1440 return return_value;
1441 }
1442
1443 static NTSTATUS smbd_smb2_request_reply(struct smbd_smb2_request *req)
1444 {
1445 struct tevent_req *subreq;
1446 int i = req->current_idx;
1447
1448 req->subreq = NULL;
1449
1450 req->current_idx += 3;
1451
1452 if (req->current_idx < req->out.vector_count) {
1453 /*
1454 * We must process the remaining compound
1455 * SMB2 requests before any new incoming SMB2
1456 * requests. This is because incoming SMB2
1457 * requests may include a cancel for a
1458 * compound request we haven't processed
1459 * yet.
1460 */
1461 struct tevent_immediate *im = tevent_create_immediate(req);
1462 if (!im) {
1463 return NT_STATUS_NO_MEMORY;
1464 }
1465 tevent_schedule_immediate(im,
1466 req->sconn->smb2.event_ctx,
1467 smbd_smb2_request_dispatch_immediate,
1468 req);
1469 return NT_STATUS_OK;
1470 }
1471
1472 smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
1473
1474 /* Set credit for this operation (zero credits if this
1475 is a final reply for an async operation). */
1476 smb2_set_operation_credit(req->sconn,
1477 req->async ? NULL : &req->in.vector[i],
1478 &req->out.vector[i]);
1479
1480 if (req->do_signing) {
1481 NTSTATUS status;
1482 status = smb2_signing_sign_pdu(req->session->session_key,
1483 &req->out.vector[i], 3);
1484 if (!NT_STATUS_IS_OK(status)) {
1485 return status;
1486 }
1487 }
1488
1489 if (DEBUGLEVEL >= 10) {
1490 dbgtext("smbd_smb2_request_reply: sending...\n");
1491 print_req_vectors(req);
1492 }
1493
1494 /* I am a sick, sick man... :-). Sendfile hack ... JRA. */
1495 if (req->out.vector_count == 4 &&
1496 req->out.vector[3].iov_base == NULL &&
1497 req->out.vector[3].iov_len != 0) {
1498 /* Dynamic part is NULL. Chop it off,
1499 We're going to send it via sendfile. */
1500 req->out.vector_count -= 1;
1501 }
1502
1503 subreq = tstream_writev_queue_send(req,
1504 req->sconn->smb2.event_ctx,
1505 req->sconn->smb2.stream,
1506 req->sconn->smb2.send_queue,
1507 req->out.vector,
1508 req->out.vector_count);
1509 if (subreq == NULL) {
1510 return NT_STATUS_NO_MEMORY;
1511 }
1512 tevent_req_set_callback(subreq, smbd_smb2_request_writev_done, req);
1513 /*
1514 * We're done with this request -
1515 * move it off the "being processed" queue.
1516 */
1517 DLIST_REMOVE(req->sconn->smb2.requests, req);
1518
1519 return NT_STATUS_OK;
1520 }
1521
1522 void smbd_smb2_request_dispatch_immediate(struct tevent_context *ctx,
1523 struct tevent_immediate *im,
1524 void *private_data)
1525 {
1526 struct smbd_smb2_request *req = talloc_get_type_abort(private_data,
1527 struct smbd_smb2_request);
1528 struct smbd_server_connection *sconn = req->sconn;
1529 NTSTATUS status;
1530
1531 TALLOC_FREE(im);
1532
1533 if (DEBUGLEVEL >= 10) {
1534 DEBUG(10,("smbd_smb2_request_dispatch_immediate: idx[%d] of %d vectors\n",
1535 req->current_idx, req->in.vector_count));
1536 print_req_vectors(req);
1537 }
1538
1539 status = smbd_smb2_request_dispatch(req);
1540 if (!NT_STATUS_IS_OK(status)) {
1541 smbd_server_connection_terminate(sconn, nt_errstr(status));
1542 return;
1543 }
1544 }
1545
1546 static void smbd_smb2_request_writev_done(struct tevent_req *subreq)
1547 {
1548 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
1549 struct smbd_smb2_request);
1550 struct smbd_server_connection *sconn = req->sconn;
1551 int ret;
1552 int sys_errno;
1553
1554 ret = tstream_writev_queue_recv(subreq, &sys_errno);
1555 TALLOC_FREE(subreq);
1556 TALLOC_FREE(req);
1557 if (ret == -1) {
1558 NTSTATUS status = map_nt_error_from_unix(sys_errno);
1559 DEBUG(2,("smbd_smb2_request_writev_done: client write error %s\n",
1560 nt_errstr(status)));
1561 smbd_server_connection_terminate(sconn, nt_errstr(status));
1562 return;
1563 }
1564 }
1565
1566 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
1567 NTSTATUS status,
1568 DATA_BLOB body, DATA_BLOB *dyn,
1569 const char *location)
1570 {
1571 uint8_t *outhdr;
1572 int i = req->current_idx;
1573 uint32_t next_command_ofs;
1574
1575 DEBUG(10,("smbd_smb2_request_done_ex: "
1576 "idx[%d] status[%s] body[%u] dyn[%s:%u] at %s\n",
1577 i, nt_errstr(status), (unsigned int)body.length,
1578 dyn ? "yes": "no",
1579 (unsigned int)(dyn ? dyn->length : 0),
1580 location));
1581
1582 if (body.length < 2) {
1583 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
1584 }
1585
1586 if ((body.length % 2) != 0) {
1587 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
1588 }
1589
1590 outhdr = (uint8_t *)req->out.vector[i].iov_base;
1591
1592 next_command_ofs = IVAL(outhdr, SMB2_HDR_NEXT_COMMAND);
1593 SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
1594
1595 req->out.vector[i+1].iov_base = (void *)body.data;
1596 req->out.vector[i+1].iov_len = body.length;
1597
1598 if (dyn) {
1599 req->out.vector[i+2].iov_base = (void *)dyn->data;
1600 req->out.vector[i+2].iov_len = dyn->length;
1601 } else {
1602 req->out.vector[i+2].iov_base = NULL;
1603 req->out.vector[i+2].iov_len = 0;
1604 }
1605
1606 /* see if we need to recalculate the offset to the next response */
1607 if (next_command_ofs > 0) {
1608 next_command_ofs = SMB2_HDR_BODY;
1609 next_command_ofs += req->out.vector[i+1].iov_len;
1610 next_command_ofs += req->out.vector[i+2].iov_len;
1611 }
1612
1613 if ((next_command_ofs % 8) != 0) {
1614 size_t pad_size = 8 - (next_command_ofs % 8);
1615 if (req->out.vector[i+2].iov_len == 0) {
1616 /*
1617 * if the dyn buffer is empty
1618 * we can use it to add padding
1619 */
1620 uint8_t *pad;
1621
1622 pad = talloc_zero_array(req->out.vector,
1623 uint8_t, pad_size);
1624 if (pad == NULL) {
1625 return smbd_smb2_request_error(req,
1626 NT_STATUS_NO_MEMORY);
1627 }
1628
1629 req->out.vector[i+2].iov_base = (void *)pad;
1630 req->out.vector[i+2].iov_len = pad_size;
1631 } else {
1632 /*
1633 * For now we copy the dynamic buffer
1634 * and add the padding to the new buffer
1635 */
1636 size_t old_size;
1637 uint8_t *old_dyn;
1638 size_t new_size;
1639 uint8_t *new_dyn;
1640
1641 old_size = req->out.vector[i+2].iov_len;
1642 old_dyn = (uint8_t *)req->out.vector[i+2].iov_base;
1643
1644 new_size = old_size + pad_size;
1645 new_dyn = talloc_zero_array(req->out.vector,
1646 uint8_t, new_size);
1647 if (new_dyn == NULL) {
1648 return smbd_smb2_request_error(req,
1649 NT_STATUS_NO_MEMORY);
1650 }
1651
1652 memcpy(new_dyn, old_dyn, old_size);
1653 memset(new_dyn + old_size, 0, pad_size);
1654
1655 req->out.vector[i+2].iov_base = (void *)new_dyn;
1656 req->out.vector[i+2].iov_len = new_size;
1657 }
1658 next_command_ofs += pad_size;
1659 }
1660
1661 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
1662
1663 return smbd_smb2_request_reply(req);
1664 }
1665
1666 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
1667 NTSTATUS status,
1668 DATA_BLOB *info,
1669 const char *location)
1670 {
1671 DATA_BLOB body;
1672 int i = req->current_idx;
1673 uint8_t *outhdr = (uint8_t *)req->out.vector[i].iov_base;
1674
1675 DEBUG(10,("smbd_smb2_request_error_ex: idx[%d] status[%s] |%s| at %s\n",
1676 i, nt_errstr(status), info ? " +info" : "",
1677 location));
1678
1679 body.data = outhdr + SMB2_HDR_BODY;
1680 body.length = 8;
1681 SSVAL(body.data, 0, 9);
1682
1683 if (info) {
1684 SIVAL(body.data, 0x04, info->length);
1685 } else {
1686 /* Allocated size of req->out.vector[i].iov_base
1687 * *MUST BE* OUTVEC_ALLOC_SIZE. So we have room for
1688 * 1 byte without having to do an alloc.
1689 */
1690 info = talloc_zero_array(req->out.vector,
1691 DATA_BLOB,
1692 1);
1693 if (!info) {
1694 return NT_STATUS_NO_MEMORY;
1695 }
1696 info->data = ((uint8_t *)outhdr) +
1697 OUTVEC_ALLOC_SIZE - 1;
1698 info->length = 1;
1699 SCVAL(info->data, 0, 0);
1700 }
1701
1702 /*
1703 * if a request fails, all other remaining
1704 * compounded requests should fail too
1705 */
1706 req->next_status = NT_STATUS_INVALID_PARAMETER;
1707
1708 return smbd_smb2_request_done_ex(req, status, body, info, __location__);
1709 }
1710
1711
1712 struct smbd_smb2_send_oplock_break_state {
1713 struct smbd_server_connection *sconn;
1714 uint8_t buf[4 + SMB2_HDR_BODY + 0x18];
1715 struct iovec vector;
1716 };
1717
1718 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq);
1719
1720 NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
1721 uint64_t file_id_persistent,
1722 uint64_t file_id_volatile,
1723 uint8_t oplock_level)
1724 {
1725 struct smbd_smb2_send_oplock_break_state *state;
1726 struct tevent_req *subreq;
1727 uint8_t *hdr;
1728 uint8_t *body;
1729
1730 state = talloc(sconn, struct smbd_smb2_send_oplock_break_state);
1731 if (state == NULL) {
1732 return NT_STATUS_NO_MEMORY;
1733 }
1734 state->sconn = sconn;
1735
1736 state->vector.iov_base = (void *)state->buf;
1737 state->vector.iov_len = sizeof(state->buf);
1738
1739 _smb2_setlen(state->buf, sizeof(state->buf) - 4);
1740 hdr = state->buf + 4;
1741 body = hdr + SMB2_HDR_BODY;
1742
1743 SIVAL(hdr, 0, SMB2_MAGIC);
1744 SSVAL(hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
1745 SSVAL(hdr, SMB2_HDR_EPOCH, 0);
1746 SIVAL(hdr, SMB2_HDR_STATUS, 0);
1747 SSVAL(hdr, SMB2_HDR_OPCODE, SMB2_OP_BREAK);
1748 SSVAL(hdr, SMB2_HDR_CREDIT, 0);
1749 SIVAL(hdr, SMB2_HDR_FLAGS, SMB2_HDR_FLAG_REDIRECT);
1750 SIVAL(hdr, SMB2_HDR_NEXT_COMMAND, 0);
1751 SBVAL(hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
1752 SIVAL(hdr, SMB2_HDR_PID, 0);
1753 SIVAL(hdr, SMB2_HDR_TID, 0);
1754 SBVAL(hdr, SMB2_HDR_SESSION_ID, 0);
1755 memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
1756
1757 SSVAL(body, 0x00, 0x18);
1758
1759 SCVAL(body, 0x02, oplock_level);
1760 SCVAL(body, 0x03, 0); /* reserved */
1761 SIVAL(body, 0x04, 0); /* reserved */
1762 SBVAL(body, 0x08, file_id_persistent);
1763 SBVAL(body, 0x10, file_id_volatile);
1764
1765 subreq = tstream_writev_queue_send(state,
1766 sconn->smb2.event_ctx,
1767 sconn->smb2.stream,
1768 sconn->smb2.send_queue,
1769 &state->vector, 1);
1770 if (subreq == NULL) {
1771 return NT_STATUS_NO_MEMORY;
1772 }
1773 tevent_req_set_callback(subreq,
1774 smbd_smb2_oplock_break_writev_done,
1775 state);
1776
1777 return NT_STATUS_OK;
1778 }
1779
1780 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq)
1781 {
1782 struct smbd_smb2_send_oplock_break_state *state =
1783 tevent_req_callback_data(subreq,
1784 struct smbd_smb2_send_oplock_break_state);
1785 struct smbd_server_connection *sconn = state->sconn;
1786 int ret;
1787 int sys_errno;
1788
1789 ret = tstream_writev_queue_recv(subreq, &sys_errno);
1790 TALLOC_FREE(subreq);
1791 if (ret == -1) {
1792 NTSTATUS status = map_nt_error_from_unix(sys_errno);
1793 smbd_server_connection_terminate(sconn, nt_errstr(status));
1794 return;
1795 }
1796
1797 TALLOC_FREE(state);
1798 }
1799
1800 struct smbd_smb2_request_read_state {
1801 size_t missing;
1802 bool asked_for_header;
1803 struct smbd_smb2_request *smb2_req;
1804 };
1805
1806 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1807 void *private_data,
1808 TALLOC_CTX *mem_ctx,
1809 struct iovec **_vector,
1810 size_t *_count);
1811 static void smbd_smb2_request_read_done(struct tevent_req *subreq);
1812
1813 static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx,
1814 struct tevent_context *ev,
1815 struct smbd_server_connection *sconn)
1816 {
1817 struct tevent_req *req;
1818 struct smbd_smb2_request_read_state *state;
1819 struct tevent_req *subreq;
1820
1821 req = tevent_req_create(mem_ctx, &state,
1822 struct smbd_smb2_request_read_state);
1823 if (req == NULL) {
1824 return NULL;
1825 }
1826 state->missing = 0;
1827 state->asked_for_header = false;
1828
1829 state->smb2_req = smbd_smb2_request_allocate(state);
1830 if (tevent_req_nomem(state->smb2_req, req)) {
1831 return tevent_req_post(req, ev);
1832 }
1833 state->smb2_req->sconn = sconn;
1834
1835 subreq = tstream_readv_pdu_queue_send(state, ev, sconn->smb2.stream,
1836 sconn->smb2.recv_queue,
1837 smbd_smb2_request_next_vector,
1838 state);
1839 if (tevent_req_nomem(subreq, req)) {
1840 return tevent_req_post(req, ev);
1841 }
1842 tevent_req_set_callback(subreq, smbd_smb2_request_read_done, req);
1843
1844 return req;
1845 }
1846
1847 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1848 void *private_data,
1849 TALLOC_CTX *mem_ctx,
1850 struct iovec **_vector,
1851 size_t *_count)
1852 {
1853 struct smbd_smb2_request_read_state *state =
1854 talloc_get_type_abort(private_data,
1855 struct smbd_smb2_request_read_state);
1856 struct smbd_smb2_request *req = state->smb2_req;
1857 struct iovec *vector;
1858 int idx = req->in.vector_count;
1859 size_t len = 0;
1860 uint8_t *buf = NULL;
1861
1862 if (req->in.vector_count == 0) {
1863 /*
1864 * first we need to get the NBT header
1865 */
1866 req->in.vector = talloc_array(req, struct iovec,
1867 req->in.vector_count + 1);
1868 if (req->in.vector == NULL) {
1869 return -1;
1870 }
1871 req->in.vector_count += 1;
1872
1873 req->in.vector[idx].iov_base = (void *)req->in.nbt_hdr;
1874 req->in.vector[idx].iov_len = 4;
1875
1876 vector = talloc_array(mem_ctx, struct iovec, 1);
1877 if (vector == NULL) {
1878 return -1;
1879 }
1880
1881 vector[0] = req->in.vector[idx];
1882
1883 *_vector = vector;
1884 *_count = 1;
1885 return 0;
1886 }
1887
1888 if (req->in.vector_count == 1) {
1889 /*
1890 * Now we analyze the NBT header
1891 */
1892 state->missing = smb2_len(req->in.vector[0].iov_base);
1893
1894 if (state->missing == 0) {
1895 /* if there're no remaining bytes, we're done */
1896 *_vector = NULL;
1897 *_count = 0;
1898 return 0;
1899 }
1900
1901 req->in.vector = talloc_realloc(req, req->in.vector,
1902 struct iovec,
1903 req->in.vector_count + 1);
1904 if (req->in.vector == NULL) {
1905 return -1;
1906 }
1907 req->in.vector_count += 1;
1908
1909 if (CVAL(req->in.vector[0].iov_base, 0) != 0) {
1910 /*
1911 * it's a special NBT message,
1912 * so get all remaining bytes
1913 */
1914 len = state->missing;
1915 } else if (state->missing < (SMB2_HDR_BODY + 2)) {
1916 /*
1917 * it's an invalid message, just read what we can get
1918 * and let the caller handle the error
1919 */
1920 len = state->missing;
1921 } else {
1922 /*
1923 * We assume it's a SMB2 request,
1924 * and we first get the header and the
1925 * first 2 bytes (the struct size) of the body
1926 */
1927 len = SMB2_HDR_BODY + 2;
1928
1929 state->asked_for_header = true;
1930 }
1931
1932 state->missing -= len;
1933
1934 buf = talloc_array(req->in.vector, uint8_t, len);
1935 if (buf == NULL) {
1936 return -1;
1937 }
1938
1939 req->in.vector[idx].iov_base = (void *)buf;
1940 req->in.vector[idx].iov_len = len;
1941
1942 vector = talloc_array(mem_ctx, struct iovec, 1);
1943 if (vector == NULL) {
1944 return -1;
1945 }
1946
1947 vector[0] = req->in.vector[idx];
1948
1949 *_vector = vector;
1950 *_count = 1;
1951 return 0;
1952 }
1953
1954 if (state->missing == 0) {
1955 /* if there're no remaining bytes, we're done */
1956 *_vector = NULL;
1957 *_count = 0;
1958 return 0;
1959 }
1960
1961 if (state->asked_for_header) {
1962 const uint8_t *hdr;
1963 size_t full_size;
1964 size_t next_command_ofs;
1965 size_t body_size;
1966 uint8_t *body;
1967 size_t dyn_size;
1968 uint8_t *dyn;
1969 bool invalid = false;
1970
1971 state->asked_for_header = false;
1972
1973 /*
1974 * We got the SMB2 header and the first 2 bytes
1975 * of the body. We fix the size to just the header
1976 * and manually copy the 2 first bytes to the body section
1977 */
1978 req->in.vector[idx-1].iov_len = SMB2_HDR_BODY;
1979 hdr = (const uint8_t *)req->in.vector[idx-1].iov_base;
1980
1981 /* allocate vectors for body and dynamic areas */
1982 req->in.vector = talloc_realloc(req, req->in.vector,
1983 struct iovec,
1984 req->in.vector_count + 2);
1985 if (req->in.vector == NULL) {
1986 return -1;
1987 }
1988 req->in.vector_count += 2;
1989
1990 full_size = state->missing + SMB2_HDR_BODY + 2;
1991 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
1992 body_size = SVAL(hdr, SMB2_HDR_BODY);
1993
1994 if (next_command_ofs != 0) {
1995 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
1996 /*
1997 * this is invalid, just return a zero
1998 * body and let the caller deal with the error
1999 */
2000 invalid = true;
2001 } else if (next_command_ofs > full_size) {
2002 /*
2003 * this is invalid, just return a zero
2004 * body and let the caller deal with the error
2005 */
2006 invalid = true;
2007 } else {
2008 full_size = next_command_ofs;
2009 }
2010 }
2011
2012 if (!invalid) {
2013 if (body_size < 2) {
2014 /*
2015 * this is invalid, just return a zero
2016 * body and let the caller deal with the error
2017 */
2018 invalid = true;
2019 }
2020
2021 if ((body_size % 2) != 0) {
2022 body_size -= 1;
2023 }
2024
2025 if (body_size > (full_size - SMB2_HDR_BODY)) {
2026 /*
2027 * this is invalid, just return a zero
2028 * body and let the caller deal with the error
2029 */
2030 invalid = true;
2031 }
2032 }
2033
2034 if (invalid) {
2035 /* the caller should check this */
2036 body_size = 2;
2037 }
2038
2039 dyn_size = full_size - (SMB2_HDR_BODY + body_size);
2040
2041 state->missing -= (body_size - 2) + dyn_size;
2042
2043 body = talloc_array(req->in.vector, uint8_t, body_size);
2044 if (body == NULL) {
2045 return -1;
2046 }
2047
2048 dyn = talloc_array(req->in.vector, uint8_t, dyn_size);
2049 if (dyn == NULL) {
2050 return -1;
2051 }
2052
2053 req->in.vector[idx].iov_base = (void *)body;
2054 req->in.vector[idx].iov_len = body_size;
2055 req->in.vector[idx+1].iov_base = (void *)dyn;
2056 req->in.vector[idx+1].iov_len = dyn_size;
2057
2058 vector = talloc_array(mem_ctx, struct iovec, 2);
2059 if (vector == NULL) {
2060 return -1;
2061 }
2062
2063 /*
2064 * the first 2 bytes of the body were already fetched
2065 * together with the header
2066 */
2067 memcpy(body, hdr + SMB2_HDR_BODY, 2);
2068 vector[0].iov_base = body + 2;
2069 vector[0].iov_len = body_size - 2;
2070
2071 vector[1] = req->in.vector[idx+1];
2072
2073 *_vector = vector;
2074 *_count = 2;
2075 return 0;
2076 }
2077
2078 /*
2079 * when we endup here, we're looking for a new SMB2 request
2080 * next. And we ask for its header and the first 2 bytes of
2081 * the body (like we did for the first SMB2 request).
2082 */
2083
2084 req->in.vector = talloc_realloc(req, req->in.vector,
2085 struct iovec,
2086 req->in.vector_count + 1);
2087 if (req->in.vector == NULL) {
2088 return -1;
2089 }
2090 req->in.vector_count += 1;
2091
2092 /*
2093 * We assume it's a SMB2 request,
2094 * and we first get the header and the
2095 * first 2 bytes (the struct size) of the body
2096 */
2097 len = SMB2_HDR_BODY + 2;
2098
2099 if (len > state->missing) {
2100 /* let the caller handle the error */
2101 len = state->missing;
2102 }
2103
2104 state->missing -= len;
2105 state->asked_for_header = true;
2106
2107 buf = talloc_array(req->in.vector, uint8_t, len);
2108 if (buf == NULL) {
2109 return -1;
2110 }
2111
2112 req->in.vector[idx].iov_base = (void *)buf;
2113 req->in.vector[idx].iov_len = len;
2114
2115 vector = talloc_array(mem_ctx, struct iovec, 1);
2116 if (vector == NULL) {
2117 return -1;
2118 }
2119
2120 vector[0] = req->in.vector[idx];
2121
2122 *_vector = vector;
2123 *_count = 1;
2124 return 0;
2125 }
2126
2127 static void smbd_smb2_request_read_done(struct tevent_req *subreq)
2128 {
2129 struct tevent_req *req =
2130 tevent_req_callback_data(subreq,
2131 struct tevent_req);
2132 int ret;
2133 int sys_errno;
2134 NTSTATUS status;
2135
2136 ret = tstream_readv_pdu_queue_recv(subreq, &sys_errno);
2137 if (ret == -1) {
2138 status = map_nt_error_from_unix(sys_errno);
2139 tevent_req_nterror(req, status);
2140 return;
2141 }
2142
2143 tevent_req_done(req);
2144 }
2145
2146 static NTSTATUS smbd_smb2_request_read_recv(struct tevent_req *req,
2147 TALLOC_CTX *mem_ctx,
2148 struct smbd_smb2_request **_smb2_req)
2149 {
2150 struct smbd_smb2_request_read_state *state =
2151 tevent_req_data(req,
2152 struct smbd_smb2_request_read_state);
2153 NTSTATUS status;
2154
2155 if (tevent_req_is_nterror(req, &status)) {
2156 tevent_req_received(req);
2157 return status;
2158 }
2159
2160 talloc_steal(mem_ctx, state->smb2_req->mem_pool);
2161 *_smb2_req = state->smb2_req;
2162 tevent_req_received(req);
2163 return NT_STATUS_OK;
2164 }
2165
2166 static void smbd_smb2_request_incoming(struct tevent_req *subreq);
2167
2168 void smbd_smb2_first_negprot(struct smbd_server_connection *sconn,
2169 const uint8_t *inbuf, size_t size)
2170 {
2171 NTSTATUS status;
2172 struct smbd_smb2_request *req = NULL;
2173 struct tevent_req *subreq;
2174
2175 DEBUG(10,("smbd_smb2_first_negprot: packet length %u\n",
2176 (unsigned int)size));
2177
2178 status = smbd_initialize_smb2(sconn);
2179 if (!NT_STATUS_IS_OK(status)) {
2180 smbd_server_connection_terminate(sconn, nt_errstr(status));
2181 return;
2182 }
2183
2184 status = smbd_smb2_request_create(sconn, inbuf, size, &req);
2185 if (!NT_STATUS_IS_OK(status)) {
2186 smbd_server_connection_terminate(sconn, nt_errstr(status));
2187 return;
2188 }
2189
2190 status = smbd_smb2_request_setup_out(req);
2191 if (!NT_STATUS_IS_OK(status)) {
2192 smbd_server_connection_terminate(sconn, nt_errstr(status));
2193 return;
2194 }
2195
2196 status = smbd_smb2_request_dispatch(req);
2197 if (!NT_STATUS_IS_OK(status)) {
2198 smbd_server_connection_terminate(sconn, nt_errstr(status));
2199 return;
2200 }
2201
2202 /* ask for the next request */
2203 subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
2204 if (subreq == NULL) {
2205 smbd_server_connection_terminate(sconn, "no memory for reading");
2206 return;
2207 }
2208 tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
2209 }
2210
2211 static void smbd_smb2_request_incoming(struct tevent_req *subreq)
2212 {
2213 struct smbd_server_connection *sconn = tevent_req_callback_data(subreq,
2214 struct smbd_server_connection);
2215 NTSTATUS status;
2216 struct smbd_smb2_request *req = NULL;
2217
2218 status = smbd_smb2_request_read_recv(subreq, sconn, &req);
2219 TALLOC_FREE(subreq);
2220 if (!NT_STATUS_IS_OK(status)) {
2221 DEBUG(2,("smbd_smb2_request_incoming: client read error %s\n",
2222 nt_errstr(status)));
2223 smbd_server_connection_terminate(sconn, nt_errstr(status));
2224 return;
2225 }
2226
2227 if (req->in.nbt_hdr[0] != 0x00) {
2228 DEBUG(1,("smbd_smb2_request_incoming: ignore NBT[0x%02X] msg\n",
2229 req->in.nbt_hdr[0]));
2230 TALLOC_FREE(req);
2231 goto next;
2232 }
2233
2234 req->current_idx = 1;
2235
2236 DEBUG(10,("smbd_smb2_request_incoming: idx[%d] of %d vectors\n",
2237 req->current_idx, req->in.vector_count));
2238
2239 status = smbd_smb2_request_validate(req);
2240 if (!NT_STATUS_IS_OK(status)) {
2241 smbd_server_connection_terminate(sconn, nt_errstr(status));
2242 return;
2243 }
2244
2245 status = smbd_smb2_request_setup_out(req);
2246 if (!NT_STATUS_IS_OK(status)) {
2247 smbd_server_connection_terminate(sconn, nt_errstr(status));
2248 return;
2249 }
2250
2251 status = smbd_smb2_request_dispatch(req);
2252 if (!NT_STATUS_IS_OK(status)) {
2253 smbd_server_connection_terminate(sconn, nt_errstr(status));
2254 return;
2255 }
2256
2257 next:
2258 /* ask for the next request (this constructs the main loop) */
2259 subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
2260 if (subreq == NULL) {
2261 smbd_server_connection_terminate(sconn, "no memory for reading");
2262 return;
2263 }
2264 tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
2265 }
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