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s3: Add winbindd_lookupsids
[Samba.git] / source3 / smbd / smb2_server.c
blob50505e773028e3592e31267a6796111facb9dd77
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
28 #define OUTVEC_ALLOC_SIZE (SMB2_HDR_BODY + 9)
29
30 static const char *smb2_names[] = {
31 "SMB2_NEGPROT",
32 "SMB2_SESSSETUP",
33 "SMB2_LOGOFF",
34 "SMB2_TCON",
35 "SMB2_TDIS",
36 "SMB2_CREATE",
37 "SMB2_CLOSE",
38 "SMB2_FLUSH",
39 "SMB2_READ",
40 "SMB2_WRITE",
41 "SMB2_LOCK",
42 "SMB2_IOCTL",
43 "SMB2_CANCEL",
44 "SMB2_KEEPALIVE",
45 "SMB2_FIND",
46 "SMB2_NOTIFY",
47 "SMB2_GETINFO",
48 "SMB2_SETINFO",
49 "SMB2_BREAK"
50 };
51
52 const char *smb2_opcode_name(uint16_t opcode)
53 {
54 if (opcode > 0x12) {
55 return "Bad SMB2 opcode";
56 }
57 return smb2_names[opcode];
58 }
59
60 static void print_req_vectors(struct smbd_smb2_request *req)
61 {
62 int i;
63
64 for (i = 0; i < req->in.vector_count; i++) {
65 dbgtext("\treq->in.vector[%u].iov_len = %u\n",
66 (unsigned int)i,
67 (unsigned int)req->in.vector[i].iov_len);
68 }
69 for (i = 0; i < req->out.vector_count; i++) {
70 dbgtext("\treq->out.vector[%u].iov_len = %u\n",
71 (unsigned int)i,
72 (unsigned int)req->out.vector[i].iov_len);
73 }
74 }
75
76 bool smbd_is_smb2_header(const uint8_t *inbuf, size_t size)
77 {
78 if (size < (4 + SMB2_HDR_BODY)) {
79 return false;
80 }
81
82 if (IVAL(inbuf, 4) != SMB2_MAGIC) {
83 return false;
84 }
85
86 return true;
87 }
88
89 static NTSTATUS smbd_initialize_smb2(struct smbd_server_connection *sconn)
90 {
91 NTSTATUS status;
92 int ret;
93
94 TALLOC_FREE(sconn->smb1.fde);
95
96 sconn->smb2.event_ctx = smbd_event_context();
97
98 sconn->smb2.recv_queue = tevent_queue_create(sconn, "smb2 recv queue");
99 if (sconn->smb2.recv_queue == NULL) {
100 return NT_STATUS_NO_MEMORY;
101 }
102
103 sconn->smb2.send_queue = tevent_queue_create(sconn, "smb2 send queue");
104 if (sconn->smb2.send_queue == NULL) {
105 return NT_STATUS_NO_MEMORY;
106 }
107
108 sconn->smb2.sessions.idtree = idr_init(sconn);
109 if (sconn->smb2.sessions.idtree == NULL) {
110 return NT_STATUS_NO_MEMORY;
111 }
112 sconn->smb2.sessions.limit = 0x0000FFFE;
113 sconn->smb2.sessions.list = NULL;
114 sconn->smb2.seqnum_low = 0;
115 sconn->smb2.credits_granted = 0;
116 sconn->smb2.max_credits = lp_smb2_max_credits();
117 sconn->smb2.credits_bitmap = bitmap_talloc(sconn,
118 DEFAULT_SMB2_MAX_CREDIT_BITMAP_FACTOR*sconn->smb2.max_credits);
119 if (sconn->smb2.credits_bitmap == NULL) {
120 return NT_STATUS_NO_MEMORY;
121 }
122
123 ret = tstream_bsd_existing_socket(sconn, sconn->sock,
124 &sconn->smb2.stream);
125 if (ret == -1) {
126 status = map_nt_error_from_unix(errno);
127 return status;
128 }
129
130 /* Ensure child is set to non-blocking mode */
131 set_blocking(sconn->sock, false);
132 return NT_STATUS_OK;
133 }
134
135 #define smb2_len(buf) (PVAL(buf,3)|(PVAL(buf,2)<<8)|(PVAL(buf,1)<<16))
136 #define _smb2_setlen(_buf,len) do { \
137 uint8_t *buf = (uint8_t *)_buf; \
138 buf[0] = 0; \
139 buf[1] = ((len)&0xFF0000)>>16; \
140 buf[2] = ((len)&0xFF00)>>8; \
141 buf[3] = (len)&0xFF; \
142 } while (0)
143
144 static void smb2_setup_nbt_length(struct iovec *vector, int count)
145 {
146 size_t len = 0;
147 int i;
148
149 for (i=1; i < count; i++) {
150 len += vector[i].iov_len;
151 }
152
153 _smb2_setlen(vector[0].iov_base, len);
154 }
155
156 static int smbd_smb2_request_parent_destructor(struct smbd_smb2_request **req)
157 {
158 if (*req) {
159 (*req)->parent = NULL;
160 (*req)->mem_pool = NULL;
161 }
162
163 return 0;
164 }
165
166 static int smbd_smb2_request_destructor(struct smbd_smb2_request *req)
167 {
168 if (req->parent) {
169 *req->parent = NULL;
170 talloc_free(req->mem_pool);
171 }
172
173 return 0;
174 }
175
176 static struct smbd_smb2_request *smbd_smb2_request_allocate(TALLOC_CTX *mem_ctx)
177 {
178 TALLOC_CTX *mem_pool;
179 struct smbd_smb2_request **parent;
180 struct smbd_smb2_request *req;
181
182 #if 0
183 /* Enable this to find subtle valgrind errors. */
184 mem_pool = talloc_init("smbd_smb2_request_allocate");
185 #else
186 mem_pool = talloc_pool(mem_ctx, 8192);
187 #endif
188 if (mem_pool == NULL) {
189 return NULL;
190 }
191
192 parent = talloc(mem_pool, struct smbd_smb2_request *);
193 if (parent == NULL) {
194 talloc_free(mem_pool);
195 return NULL;
196 }
197
198 req = talloc_zero(parent, struct smbd_smb2_request);
199 if (req == NULL) {
200 talloc_free(mem_pool);
201 return NULL;
202 }
203 *parent = req;
204 req->mem_pool = mem_pool;
205 req->parent = parent;
206
207 talloc_set_destructor(parent, smbd_smb2_request_parent_destructor);
208 talloc_set_destructor(req, smbd_smb2_request_destructor);
209
210 return req;
211 }
212
213 static NTSTATUS smbd_smb2_request_create(struct smbd_server_connection *sconn,
214 const uint8_t *inbuf, size_t size,
215 struct smbd_smb2_request **_req)
216 {
217 struct smbd_smb2_request *req;
218 uint32_t protocol_version;
219 const uint8_t *inhdr = NULL;
220 off_t ofs = 0;
221 uint16_t cmd;
222 uint32_t next_command_ofs;
223
224 if (size < (4 + SMB2_HDR_BODY + 2)) {
225 DEBUG(0,("Invalid SMB2 packet length count %ld\n", (long)size));
226 return NT_STATUS_INVALID_PARAMETER;
227 }
228
229 inhdr = inbuf + 4;
230
231 protocol_version = IVAL(inhdr, SMB2_HDR_PROTOCOL_ID);
232 if (protocol_version != SMB2_MAGIC) {
233 DEBUG(0,("Invalid SMB packet: protocol prefix: 0x%08X\n",
234 protocol_version));
235 return NT_STATUS_INVALID_PARAMETER;
236 }
237
238 cmd = SVAL(inhdr, SMB2_HDR_OPCODE);
239 if (cmd != SMB2_OP_NEGPROT) {
240 DEBUG(0,("Invalid SMB packet: first request: 0x%04X\n",
241 cmd));
242 return NT_STATUS_INVALID_PARAMETER;
243 }
244
245 next_command_ofs = IVAL(inhdr, SMB2_HDR_NEXT_COMMAND);
246 if (next_command_ofs != 0) {
247 DEBUG(0,("Invalid SMB packet: next_command: 0x%08X\n",
248 next_command_ofs));
249 return NT_STATUS_INVALID_PARAMETER;
250 }
251
252 req = smbd_smb2_request_allocate(sconn);
253 if (req == NULL) {
254 return NT_STATUS_NO_MEMORY;
255 }
256 req->sconn = sconn;
257
258 talloc_steal(req, inbuf);
259
260 req->in.vector = talloc_array(req, struct iovec, 4);
261 if (req->in.vector == NULL) {
262 TALLOC_FREE(req);
263 return NT_STATUS_NO_MEMORY;
264 }
265 req->in.vector_count = 4;
266
267 memcpy(req->in.nbt_hdr, inbuf, 4);
268
269 ofs = 0;
270 req->in.vector[0].iov_base = (void *)req->in.nbt_hdr;
271 req->in.vector[0].iov_len = 4;
272 ofs += req->in.vector[0].iov_len;
273
274 req->in.vector[1].iov_base = (void *)(inbuf + ofs);
275 req->in.vector[1].iov_len = SMB2_HDR_BODY;
276 ofs += req->in.vector[1].iov_len;
277
278 req->in.vector[2].iov_base = (void *)(inbuf + ofs);
279 req->in.vector[2].iov_len = SVAL(inbuf, ofs) & 0xFFFE;
280 ofs += req->in.vector[2].iov_len;
281
282 if (ofs > size) {
283 return NT_STATUS_INVALID_PARAMETER;
284 }
285
286 req->in.vector[3].iov_base = (void *)(inbuf + ofs);
287 req->in.vector[3].iov_len = size - ofs;
288 ofs += req->in.vector[3].iov_len;
289
290 req->current_idx = 1;
291
292 *_req = req;
293 return NT_STATUS_OK;
294 }
295
296 static bool smb2_validate_message_id(struct smbd_server_connection *sconn,
297 const uint8_t *inhdr)
298 {
299 uint64_t message_id = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
300 struct bitmap *credits_bm = sconn->smb2.credits_bitmap;
301 uint16_t opcode = IVAL(inhdr, SMB2_HDR_OPCODE);
302 unsigned int bitmap_offset;
303
304 if (opcode == SMB2_OP_CANCEL) {
305 /* SMB2_CANCEL requests by definition resend messageids. */
306 return true;
307 }
308
309 if (message_id < sconn->smb2.seqnum_low ||
310 message_id > (sconn->smb2.seqnum_low +
311 (sconn->smb2.max_credits * DEFAULT_SMB2_MAX_CREDIT_BITMAP_FACTOR))) {
312 DEBUG(0,("smb2_validate_message_id: bad message_id "
313 "%llu (low = %llu, max = %lu)\n",
314 (unsigned long long)message_id,
315 (unsigned long long)sconn->smb2.seqnum_low,
316 (unsigned long)sconn->smb2.max_credits ));
317 return false;
318 }
319
320 /* client just used a credit. */
321 SMB_ASSERT(sconn->smb2.credits_granted > 0);
322 sconn->smb2.credits_granted -= 1;
323
324 /* Mark the message_id as seen in the bitmap. */
325 bitmap_offset = (unsigned int)(message_id %
326 (uint64_t)(sconn->smb2.max_credits * DEFAULT_SMB2_MAX_CREDIT_BITMAP_FACTOR));
327 if (bitmap_query(credits_bm, bitmap_offset)) {
328 DEBUG(0,("smb2_validate_message_id: duplicate message_id "
329 "%llu (bm offset %u)\n",
330 (unsigned long long)message_id,
331 bitmap_offset));
332 return false;
333 }
334 bitmap_set(credits_bm, bitmap_offset);
335
336 if (message_id == sconn->smb2.seqnum_low + 1) {
337 /* Move the window forward by all the message_id's
338 already seen. */
339 while (bitmap_query(credits_bm, bitmap_offset)) {
340 DEBUG(10,("smb2_validate_message_id: clearing "
341 "id %llu (position %u) from bitmap\n",
342 (unsigned long long)(sconn->smb2.seqnum_low + 1),
343 bitmap_offset ));
344 bitmap_clear(credits_bm, bitmap_offset);
345 sconn->smb2.seqnum_low += 1;
346 bitmap_offset = (bitmap_offset + 1) %
347 (sconn->smb2.max_credits * DEFAULT_SMB2_MAX_CREDIT_BITMAP_FACTOR);
348 }
349 }
350
351 return true;
352 }
353
354 static NTSTATUS smbd_smb2_request_validate(struct smbd_smb2_request *req)
355 {
356 int count;
357 int idx;
358 bool compound_related = false;
359
360 count = req->in.vector_count;
361
362 if (count < 4) {
363 /* It's not a SMB2 request */
364 return NT_STATUS_INVALID_PARAMETER;
365 }
366
367 for (idx=1; idx < count; idx += 3) {
368 const uint8_t *inhdr = NULL;
369 uint32_t flags;
370
371 if (req->in.vector[idx].iov_len != SMB2_HDR_BODY) {
372 return NT_STATUS_INVALID_PARAMETER;
373 }
374
375 if (req->in.vector[idx+1].iov_len < 2) {
376 return NT_STATUS_INVALID_PARAMETER;
377 }
378
379 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
380
381 /* Check the SMB2 header */
382 if (IVAL(inhdr, SMB2_HDR_PROTOCOL_ID) != SMB2_MAGIC) {
383 return NT_STATUS_INVALID_PARAMETER;
384 }
385
386 if (!smb2_validate_message_id(req->sconn, inhdr)) {
387 return NT_STATUS_INVALID_PARAMETER;
388 }
389
390 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
391 if (idx == 1) {
392 /*
393 * the 1st request should never have the
394 * SMB2_HDR_FLAG_CHAINED flag set
395 */
396 if (flags & SMB2_HDR_FLAG_CHAINED) {
397 req->next_status = NT_STATUS_INVALID_PARAMETER;
398 return NT_STATUS_OK;
399 }
400 } else if (idx == 4) {
401 /*
402 * the 2nd request triggers related vs. unrelated
403 * compounded requests
404 */
405 if (flags & SMB2_HDR_FLAG_CHAINED) {
406 compound_related = true;
407 }
408 } else if (idx > 4) {
409 #if 0
410 /*
411 * It seems the this tests are wrong
412 * see the SMB2-COMPOUND test
413 */
414
415 /*
416 * all other requests should match the 2nd one
417 */
418 if (flags & SMB2_HDR_FLAG_CHAINED) {
419 if (!compound_related) {
420 req->next_status =
421 NT_STATUS_INVALID_PARAMETER;
422 return NT_STATUS_OK;
423 }
424 } else {
425 if (compound_related) {
426 req->next_status =
427 NT_STATUS_INVALID_PARAMETER;
428 return NT_STATUS_OK;
429 }
430 }
431 #endif
432 }
433 }
434
435 return NT_STATUS_OK;
436 }
437
438 static void smb2_set_operation_credit(struct smbd_server_connection *sconn,
439 const struct iovec *in_vector,
440 struct iovec *out_vector)
441 {
442 uint8_t *outhdr = (uint8_t *)out_vector->iov_base;
443 uint16_t credits_requested = 0;
444 uint16_t credits_granted = 0;
445
446 if (in_vector != NULL) {
447 const uint8_t *inhdr = (const uint8_t *)in_vector->iov_base;
448 credits_requested = SVAL(inhdr, SMB2_HDR_CREDIT);
449 }
450
451 SMB_ASSERT(sconn->smb2.max_credits >= sconn->smb2.credits_granted);
452
453 /* Remember what we gave out. */
454 credits_granted = MIN(credits_requested, (sconn->smb2.max_credits -
455 sconn->smb2.credits_granted));
456
457 if (credits_granted == 0 && sconn->smb2.credits_granted == 0) {
458 /* First negprot packet, or ensure the client credits can
459 never drop to zero. */
460 credits_granted = 1;
461 }
462
463 SSVAL(outhdr, SMB2_HDR_CREDIT, credits_granted);
464 sconn->smb2.credits_granted += credits_granted;
465
466 DEBUG(10,("smb2_set_operation_credit: requested %u, "
467 "granted %u, total granted %u\n",
468 (unsigned int)credits_requested,
469 (unsigned int)credits_granted,
470 (unsigned int)sconn->smb2.credits_granted ));
471 }
472
473 static void smb2_calculate_credits(const struct smbd_smb2_request *inreq,
474 struct smbd_smb2_request *outreq)
475 {
476 int count, idx;
477
478 count = outreq->out.vector_count;
479
480 for (idx=1; idx < count; idx += 3) {
481 smb2_set_operation_credit(outreq->sconn,
482 &inreq->in.vector[idx],
483 &outreq->out.vector[idx]);
484 }
485 }
486
487 static NTSTATUS smbd_smb2_request_setup_out(struct smbd_smb2_request *req)
488 {
489 struct iovec *vector;
490 int count;
491 int idx;
492
493 count = req->in.vector_count;
494 vector = talloc_zero_array(req, struct iovec, count);
495 if (vector == NULL) {
496 return NT_STATUS_NO_MEMORY;
497 }
498
499 vector[0].iov_base = req->out.nbt_hdr;
500 vector[0].iov_len = 4;
501 SIVAL(req->out.nbt_hdr, 0, 0);
502
503 for (idx=1; idx < count; idx += 3) {
504 const uint8_t *inhdr = NULL;
505 uint32_t in_flags;
506 uint8_t *outhdr = NULL;
507 uint8_t *outbody = NULL;
508 uint32_t next_command_ofs = 0;
509 struct iovec *current = &vector[idx];
510
511 if ((idx + 3) < count) {
512 /* we have a next command -
513 * setup for the error case. */
514 next_command_ofs = SMB2_HDR_BODY + 9;
515 }
516
517 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
518 in_flags = IVAL(inhdr, SMB2_HDR_FLAGS);
519
520 outhdr = talloc_zero_array(vector, uint8_t,
521 OUTVEC_ALLOC_SIZE);
522 if (outhdr == NULL) {
523 return NT_STATUS_NO_MEMORY;
524 }
525
526 outbody = outhdr + SMB2_HDR_BODY;
527
528 current[0].iov_base = (void *)outhdr;
529 current[0].iov_len = SMB2_HDR_BODY;
530
531 current[1].iov_base = (void *)outbody;
532 current[1].iov_len = 8;
533
534 current[2].iov_base = NULL;
535 current[2].iov_len = 0;
536
537 /* setup the SMB2 header */
538 SIVAL(outhdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
539 SSVAL(outhdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
540 SSVAL(outhdr, SMB2_HDR_EPOCH, 0);
541 SIVAL(outhdr, SMB2_HDR_STATUS,
542 NT_STATUS_V(NT_STATUS_INTERNAL_ERROR));
543 SSVAL(outhdr, SMB2_HDR_OPCODE,
544 SVAL(inhdr, SMB2_HDR_OPCODE));
545 SIVAL(outhdr, SMB2_HDR_FLAGS,
546 IVAL(inhdr, SMB2_HDR_FLAGS) | SMB2_HDR_FLAG_REDIRECT);
547 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
548 SBVAL(outhdr, SMB2_HDR_MESSAGE_ID,
549 BVAL(inhdr, SMB2_HDR_MESSAGE_ID));
550 SIVAL(outhdr, SMB2_HDR_PID,
551 IVAL(inhdr, SMB2_HDR_PID));
552 SIVAL(outhdr, SMB2_HDR_TID,
553 IVAL(inhdr, SMB2_HDR_TID));
554 SBVAL(outhdr, SMB2_HDR_SESSION_ID,
555 BVAL(inhdr, SMB2_HDR_SESSION_ID));
556 memset(outhdr + SMB2_HDR_SIGNATURE, 0, 16);
557
558 /* setup error body header */
559 SSVAL(outbody, 0x00, 0x08 + 1);
560 SSVAL(outbody, 0x02, 0);
561 SIVAL(outbody, 0x04, 0);
562 }
563
564 req->out.vector = vector;
565 req->out.vector_count = count;
566
567 /* setup the length of the NBT packet */
568 smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
569
570 DLIST_ADD_END(req->sconn->smb2.requests, req, struct smbd_smb2_request *);
571
572 return NT_STATUS_OK;
573 }
574
575 void smbd_server_connection_terminate_ex(struct smbd_server_connection *sconn,
576 const char *reason,
577 const char *location)
578 {
579 DEBUG(10,("smbd_server_connection_terminate_ex: reason[%s] at %s\n",
580 reason, location));
581 exit_server_cleanly(reason);
582 }
583
584 static bool dup_smb2_vec3(TALLOC_CTX *ctx,
585 struct iovec *outvec,
586 const struct iovec *srcvec)
587 {
588 /* vec[0] is always boilerplate and must
589 * be allocated with size OUTVEC_ALLOC_SIZE. */
590
591 outvec[0].iov_base = talloc_memdup(ctx,
592 srcvec[0].iov_base,
593 OUTVEC_ALLOC_SIZE);
594 if (!outvec[0].iov_base) {
595 return false;
596 }
597 outvec[0].iov_len = SMB2_HDR_BODY;
598
599 /*
600 * If this is a "standard" vec[1] of length 8,
601 * pointing to srcvec[0].iov_base + SMB2_HDR_BODY,
602 * then duplicate this. Else use talloc_memdup().
603 */
604
605 if (srcvec[1].iov_len == 8 &&
606 srcvec[1].iov_base ==
607 ((uint8_t *)srcvec[0].iov_base) +
608 SMB2_HDR_BODY) {
609 outvec[1].iov_base = ((uint8_t *)outvec[1].iov_base) +
610 SMB2_HDR_BODY;
611 outvec[1].iov_len = 8;
612 } else {
613 outvec[1].iov_base = talloc_memdup(ctx,
614 srcvec[1].iov_base,
615 srcvec[1].iov_len);
616 if (!outvec[1].iov_base) {
617 return false;
618 }
619 outvec[1].iov_len = srcvec[1].iov_len;
620 }
621
622 /*
623 * If this is a "standard" vec[2] of length 1,
624 * pointing to srcvec[0].iov_base + (OUTVEC_ALLOC_SIZE - 1)
625 * then duplicate this. Else use talloc_memdup().
626 */
627
628 if (srcvec[2].iov_base &&
629 srcvec[2].iov_len) {
630 if (srcvec[2].iov_base ==
631 ((uint8_t *)srcvec[0].iov_base) +
632 (OUTVEC_ALLOC_SIZE - 1) &&
633 srcvec[2].iov_len == 1) {
634 /* Common SMB2 error packet case. */
635 outvec[2].iov_base = ((uint8_t *)outvec[0].iov_base) +
636 (OUTVEC_ALLOC_SIZE - 1);
637 } else {
638 outvec[2].iov_base = talloc_memdup(ctx,
639 srcvec[2].iov_base,
640 srcvec[2].iov_len);
641 if (!outvec[2].iov_base) {
642 return false;
643 }
644 }
645 outvec[2].iov_len = srcvec[2].iov_len;
646 } else {
647 outvec[2].iov_base = NULL;
648 outvec[2].iov_len = 0;
649 }
650 return true;
651 }
652
653 static struct smbd_smb2_request *dup_smb2_req(const struct smbd_smb2_request *req)
654 {
655 struct smbd_smb2_request *newreq = NULL;
656 struct iovec *outvec = NULL;
657 int count = req->out.vector_count;
658 int i;
659
660 newreq = smbd_smb2_request_allocate(req->sconn);
661 if (!newreq) {
662 return NULL;
663 }
664
665 newreq->sconn = req->sconn;
666 newreq->do_signing = req->do_signing;
667 newreq->current_idx = req->current_idx;
668 newreq->async = false;
669 newreq->cancelled = false;
670
671 outvec = talloc_zero_array(newreq, struct iovec, count);
672 if (!outvec) {
673 TALLOC_FREE(newreq);
674 return NULL;
675 }
676 newreq->out.vector = outvec;
677 newreq->out.vector_count = count;
678
679 /* Setup the outvec's identically to req. */
680 outvec[0].iov_base = newreq->out.nbt_hdr;
681 outvec[0].iov_len = 4;
682 memcpy(newreq->out.nbt_hdr, req->out.nbt_hdr, 4);
683
684 /* Setup the vectors identically to the ones in req. */
685 for (i = 1; i < count; i += 3) {
686 if (!dup_smb2_vec3(outvec, &outvec[i], &req->out.vector[i])) {
687 break;
688 }
689 }
690
691 if (i < count) {
692 /* Alloc failed. */
693 TALLOC_FREE(newreq);
694 return NULL;
695 }
696
697 smb2_setup_nbt_length(newreq->out.vector,
698 newreq->out.vector_count);
699
700 return newreq;
701 }
702
703 static void smbd_smb2_request_writev_done(struct tevent_req *subreq);
704
705 static NTSTATUS smb2_send_async_interim_response(const struct smbd_smb2_request *req)
706 {
707 int i = 0;
708 uint8_t *outhdr = NULL;
709 struct smbd_smb2_request *nreq = NULL;
710
711 /* Create a new smb2 request we'll use
712 for the interim return. */
713 nreq = dup_smb2_req(req);
714 if (!nreq) {
715 return NT_STATUS_NO_MEMORY;
716 }
717
718 /* Lose the last 3 out vectors. They're the
719 ones we'll be using for the async reply. */
720 nreq->out.vector_count -= 3;
721
722 smb2_setup_nbt_length(nreq->out.vector,
723 nreq->out.vector_count);
724
725 /* Step back to the previous reply. */
726 i = nreq->current_idx - 3;
727 outhdr = (uint8_t *)nreq->out.vector[i].iov_base;
728 /* And end the chain. */
729 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, 0);
730
731 /* Calculate outgoing credits */
732 smb2_calculate_credits(req, nreq);
733
734 /* Re-sign if needed. */
735 if (nreq->do_signing) {
736 NTSTATUS status;
737 status = smb2_signing_sign_pdu(nreq->session->session_key,
738 &nreq->out.vector[i], 3);
739 if (!NT_STATUS_IS_OK(status)) {
740 return status;
741 }
742 }
743 if (DEBUGLEVEL >= 10) {
744 dbgtext("smb2_send_async_interim_response: nreq->current_idx = %u\n",
745 (unsigned int)nreq->current_idx );
746 dbgtext("smb2_send_async_interim_response: returning %u vectors\n",
747 (unsigned int)nreq->out.vector_count );
748 print_req_vectors(nreq);
749 }
750 nreq->subreq = tstream_writev_queue_send(nreq,
751 nreq->sconn->smb2.event_ctx,
752 nreq->sconn->smb2.stream,
753 nreq->sconn->smb2.send_queue,
754 nreq->out.vector,
755 nreq->out.vector_count);
756
757 if (nreq->subreq == NULL) {
758 return NT_STATUS_NO_MEMORY;
759 }
760
761 tevent_req_set_callback(nreq->subreq,
762 smbd_smb2_request_writev_done,
763 nreq);
764
765 return NT_STATUS_OK;
766 }
767
768 struct smbd_smb2_request_pending_state {
769 struct smbd_server_connection *sconn;
770 uint8_t buf[4 + SMB2_HDR_BODY + 0x08 + 1];
771 struct iovec vector[3];
772 };
773
774 static void smbd_smb2_request_pending_writev_done(struct tevent_req *subreq)
775 {
776 struct smbd_smb2_request_pending_state *state =
777 tevent_req_callback_data(subreq,
778 struct smbd_smb2_request_pending_state);
779 struct smbd_server_connection *sconn = state->sconn;
780 int ret;
781 int sys_errno;
782
783 ret = tstream_writev_queue_recv(subreq, &sys_errno);
784 TALLOC_FREE(subreq);
785 if (ret == -1) {
786 NTSTATUS status = map_nt_error_from_unix(sys_errno);
787 smbd_server_connection_terminate(sconn, nt_errstr(status));
788 return;
789 }
790
791 TALLOC_FREE(state);
792 }
793
794 NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req,
795 struct tevent_req *subreq)
796 {
797 NTSTATUS status;
798 struct smbd_smb2_request_pending_state *state = NULL;
799 int i = req->current_idx;
800 uint8_t *reqhdr = NULL;
801 uint8_t *hdr = NULL;
802 uint8_t *body = NULL;
803 uint32_t flags = 0;
804 uint64_t message_id = 0;
805 uint64_t async_id = 0;
806 struct iovec *outvec = NULL;
807
808 if (!tevent_req_is_in_progress(subreq)) {
809 return NT_STATUS_OK;
810 }
811
812 req->subreq = subreq;
813 subreq = NULL;
814
815 if (req->async) {
816 /* We're already async. */
817 return NT_STATUS_OK;
818 }
819
820 if (req->in.vector_count > i + 3) {
821 /*
822 * We're trying to go async in a compound
823 * request chain. This is not allowed.
824 * Cancel the outstanding request.
825 */
826 tevent_req_cancel(req->subreq);
827 return smbd_smb2_request_error(req,
828 NT_STATUS_INSUFFICIENT_RESOURCES);
829 }
830
831 if (DEBUGLEVEL >= 10) {
832 dbgtext("smbd_smb2_request_pending_queue: req->current_idx = %u\n",
833 (unsigned int)req->current_idx );
834 print_req_vectors(req);
835 }
836
837 if (req->out.vector_count > 4) {
838 /* This is a compound reply. We
839 * must do an interim response
840 * followed by the async response
841 * to match W2K8R2.
842 */
843 status = smb2_send_async_interim_response(req);
844 if (!NT_STATUS_IS_OK(status)) {
845 return status;
846 }
847 }
848
849 /* Don't return an intermediate packet on a pipe read/write. */
850 if (req->tcon && req->tcon->compat_conn && IS_IPC(req->tcon->compat_conn)) {
851 return NT_STATUS_OK;
852 }
853
854 reqhdr = (uint8_t *)req->out.vector[i].iov_base;
855 flags = (IVAL(reqhdr, SMB2_HDR_FLAGS) & ~SMB2_HDR_FLAG_CHAINED);
856 message_id = BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
857 async_id = message_id; /* keep it simple for now... */
858
859 /*
860 * What we send is identical to a smbd_smb2_request_error
861 * packet with an error status of STATUS_PENDING. Make use
862 * of this fact sometime when refactoring. JRA.
863 */
864
865 state = talloc_zero(req->sconn, struct smbd_smb2_request_pending_state);
866 if (state == NULL) {
867 return NT_STATUS_NO_MEMORY;
868 }
869 state->sconn = req->sconn;
870
871 state->vector[0].iov_base = (void *)state->buf;
872 state->vector[0].iov_len = 4;
873
874 state->vector[1].iov_base = state->buf + 4;
875 state->vector[1].iov_len = SMB2_HDR_BODY;
876
877 state->vector[2].iov_base = state->buf + 4 + SMB2_HDR_BODY;
878 state->vector[2].iov_len = 9;
879
880 smb2_setup_nbt_length(state->vector, 3);
881
882 hdr = (uint8_t *)state->vector[1].iov_base;
883 body = (uint8_t *)state->vector[2].iov_base;
884
885 SIVAL(hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
886 SSVAL(hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
887 SSVAL(hdr, SMB2_HDR_EPOCH, 0);
888 SIVAL(hdr, SMB2_HDR_STATUS, NT_STATUS_V(STATUS_PENDING));
889 SSVAL(hdr, SMB2_HDR_OPCODE, SVAL(reqhdr, SMB2_HDR_OPCODE));
890
891 SIVAL(hdr, SMB2_HDR_FLAGS, flags | SMB2_HDR_FLAG_ASYNC);
892 SIVAL(hdr, SMB2_HDR_NEXT_COMMAND, 0);
893 SBVAL(hdr, SMB2_HDR_MESSAGE_ID, message_id);
894 SBVAL(hdr, SMB2_HDR_PID, async_id);
895 SBVAL(hdr, SMB2_HDR_SESSION_ID,
896 BVAL(reqhdr, SMB2_HDR_SESSION_ID));
897 memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
898
899 SSVAL(body, 0x00, 0x08 + 1);
900
901 SCVAL(body, 0x02, 0);
902 SCVAL(body, 0x03, 0);
903 SIVAL(body, 0x04, 0);
904 /* Match W2K8R2... */
905 SCVAL(body, 0x08, 0x21);
906
907 /* Ensure we correctly go through crediting. Grant
908 the credits now, and zero credits on the final
909 response. */
910 smb2_set_operation_credit(req->sconn,
911 &req->in.vector[i],
912 &state->vector[1]);
913
914 if (req->do_signing) {
915 status = smb2_signing_sign_pdu(req->session->session_key,
916 state->vector, 3);
917 if (!NT_STATUS_IS_OK(status)) {
918 return status;
919 }
920 }
921
922 subreq = tstream_writev_queue_send(state,
923 req->sconn->smb2.event_ctx,
924 req->sconn->smb2.stream,
925 req->sconn->smb2.send_queue,
926 state->vector,
927 3);
928
929 if (subreq == NULL) {
930 return NT_STATUS_NO_MEMORY;
931 }
932
933 tevent_req_set_callback(subreq,
934 smbd_smb2_request_pending_writev_done,
935 state);
936
937 /* Note we're going async with this request. */
938 req->async = true;
939
940 /*
941 * Now manipulate req so that the outstanding async request
942 * is the only one left in the struct smbd_smb2_request.
943 */
944
945 if (req->current_idx == 1) {
946 /* There was only one. */
947 goto out;
948 }
949
950 /* Re-arrange the in.vectors. */
951 req->in.vector[1] = req->in.vector[i];
952 req->in.vector[2] = req->in.vector[i+1];
953 req->in.vector[3] = req->in.vector[i+2];
954 req->in.vector_count = 4;
955 /* Reset the new in size. */
956 smb2_setup_nbt_length(req->in.vector, 4);
957
958 /* Now recreate the out.vectors. */
959 outvec = talloc_zero_array(req, struct iovec, 4);
960 if (!outvec) {
961 return NT_STATUS_NO_MEMORY;
962 }
963
964 /* 0 is always boilerplate and must
965 * be of size 4 for the length field. */
966
967 outvec[0].iov_base = req->out.nbt_hdr;
968 outvec[0].iov_len = 4;
969 SIVAL(req->out.nbt_hdr, 0, 0);
970
971 if (!dup_smb2_vec3(outvec, &outvec[1], &req->out.vector[i])) {
972 return NT_STATUS_NO_MEMORY;
973 }
974
975 TALLOC_FREE(req->out.vector);
976
977 req->out.vector = outvec;
978
979 req->current_idx = 1;
980 req->out.vector_count = 4;
981
982 out:
983
984 smb2_setup_nbt_length(req->out.vector,
985 req->out.vector_count);
986
987 /* Ensure our final reply matches the interim one. */
988 reqhdr = (uint8_t *)req->out.vector[1].iov_base;
989 SIVAL(reqhdr, SMB2_HDR_FLAGS, flags | SMB2_HDR_FLAG_ASYNC);
990 SBVAL(reqhdr, SMB2_HDR_PID, async_id);
991
992 {
993 const uint8_t *inhdr =
994 (const uint8_t *)req->in.vector[1].iov_base;
995 DEBUG(10,("smbd_smb2_request_pending_queue: opcode[%s] mid %llu "
996 "going async\n",
997 smb2_opcode_name((uint16_t)IVAL(inhdr, SMB2_HDR_OPCODE)),
998 (unsigned long long)async_id ));
999 }
1000 return NT_STATUS_OK;
1001 }
1002
1003 static NTSTATUS smbd_smb2_request_process_cancel(struct smbd_smb2_request *req)
1004 {
1005 struct smbd_server_connection *sconn = req->sconn;
1006 struct smbd_smb2_request *cur;
1007 const uint8_t *inhdr;
1008 int i = req->current_idx;
1009 uint32_t flags;
1010 uint64_t search_message_id;
1011 uint64_t search_async_id;
1012 uint64_t found_id;
1013
1014 inhdr = (const uint8_t *)req->in.vector[i].iov_base;
1015
1016 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
1017 search_message_id = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
1018 search_async_id = BVAL(inhdr, SMB2_HDR_PID);
1019
1020 /*
1021 * we don't need the request anymore
1022 * cancel requests never have a response
1023 */
1024 DLIST_REMOVE(req->sconn->smb2.requests, req);
1025 TALLOC_FREE(req);
1026
1027 for (cur = sconn->smb2.requests; cur; cur = cur->next) {
1028 const uint8_t *outhdr;
1029 uint64_t message_id;
1030 uint64_t async_id;
1031
1032 i = cur->current_idx;
1033
1034 outhdr = (const uint8_t *)cur->out.vector[i].iov_base;
1035
1036 message_id = BVAL(outhdr, SMB2_HDR_MESSAGE_ID);
1037 async_id = BVAL(outhdr, SMB2_HDR_PID);
1038
1039 if (flags & SMB2_HDR_FLAG_ASYNC) {
1040 if (search_async_id == async_id) {
1041 found_id = async_id;
1042 break;
1043 }
1044 } else {
1045 if (search_message_id == message_id) {
1046 found_id = message_id;
1047 break;
1048 }
1049 }
1050 }
1051
1052 if (cur && cur->subreq) {
1053 inhdr = (const uint8_t *)cur->in.vector[i].iov_base;
1054 DEBUG(10,("smbd_smb2_request_process_cancel: attempting to "
1055 "cancel opcode[%s] mid %llu\n",
1056 smb2_opcode_name((uint16_t)IVAL(inhdr, SMB2_HDR_OPCODE)),
1057 (unsigned long long)found_id ));
1058 tevent_req_cancel(cur->subreq);
1059 }
1060
1061 return NT_STATUS_OK;
1062 }
1063
1064 NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req)
1065 {
1066 const uint8_t *inhdr;
1067 int i = req->current_idx;
1068 uint16_t opcode;
1069 uint32_t flags;
1070 uint64_t mid;
1071 NTSTATUS status;
1072 NTSTATUS session_status;
1073 uint32_t allowed_flags;
1074 NTSTATUS return_value;
1075
1076 inhdr = (const uint8_t *)req->in.vector[i].iov_base;
1077
1078 /* TODO: verify more things */
1079
1080 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
1081 opcode = IVAL(inhdr, SMB2_HDR_OPCODE);
1082 mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
1083 DEBUG(10,("smbd_smb2_request_dispatch: opcode[%s] mid = %llu\n",
1084 smb2_opcode_name(opcode),
1085 (unsigned long long)mid));
1086
1087 allowed_flags = SMB2_HDR_FLAG_CHAINED |
1088 SMB2_HDR_FLAG_SIGNED |
1089 SMB2_HDR_FLAG_DFS;
1090 if (opcode == SMB2_OP_CANCEL) {
1091 allowed_flags |= SMB2_HDR_FLAG_ASYNC;
1092 }
1093 if ((flags & ~allowed_flags) != 0) {
1094 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
1095 }
1096
1097 session_status = smbd_smb2_request_check_session(req);
1098
1099 req->do_signing = false;
1100 if (flags & SMB2_HDR_FLAG_SIGNED) {
1101 if (!NT_STATUS_IS_OK(session_status)) {
1102 return smbd_smb2_request_error(req, session_status);
1103 }
1104
1105 req->do_signing = true;
1106 status = smb2_signing_check_pdu(req->session->session_key,
1107 &req->in.vector[i], 3);
1108 if (!NT_STATUS_IS_OK(status)) {
1109 return smbd_smb2_request_error(req, status);
1110 }
1111 } else if (req->session && req->session->do_signing) {
1112 return smbd_smb2_request_error(req, NT_STATUS_ACCESS_DENIED);
1113 }
1114
1115 if (flags & SMB2_HDR_FLAG_CHAINED) {
1116 /*
1117 * This check is mostly for giving the correct error code
1118 * for compounded requests.
1119 *
1120 * TODO: we may need to move this after the session
1121 * and tcon checks.
1122 */
1123 if (!NT_STATUS_IS_OK(req->next_status)) {
1124 return smbd_smb2_request_error(req, req->next_status);
1125 }
1126 } else {
1127 req->compat_chain_fsp = NULL;
1128 }
1129
1130 switch (opcode) {
1131 case SMB2_OP_NEGPROT:
1132 {
1133 START_PROFILE(smb2_negprot);
1134 return_value = smbd_smb2_request_process_negprot(req);
1135 END_PROFILE(smb2_negprot);
1136 }
1137 break;
1138
1139 case SMB2_OP_SESSSETUP:
1140 {
1141 START_PROFILE(smb2_sesssetup);
1142 return_value = smbd_smb2_request_process_sesssetup(req);
1143 END_PROFILE(smb2_sesssetup);
1144 }
1145 break;
1146
1147 case SMB2_OP_LOGOFF:
1148 if (!NT_STATUS_IS_OK(session_status)) {
1149 return_value = smbd_smb2_request_error(req, session_status);
1150 break;
1151 }
1152
1153 {
1154 START_PROFILE(smb2_logoff);
1155 return_value = smbd_smb2_request_process_logoff(req);
1156 END_PROFILE(smb2_logoff);
1157 }
1158 break;
1159
1160 case SMB2_OP_TCON:
1161 if (!NT_STATUS_IS_OK(session_status)) {
1162 return_value = smbd_smb2_request_error(req, session_status);
1163 break;
1164 }
1165 status = smbd_smb2_request_check_session(req);
1166 if (!NT_STATUS_IS_OK(status)) {
1167 return_value = smbd_smb2_request_error(req, status);
1168 break;
1169 }
1170
1171 {
1172 START_PROFILE(smb2_tcon);
1173 return_value = smbd_smb2_request_process_tcon(req);
1174 END_PROFILE(smb2_tcon);
1175 }
1176 break;
1177
1178 case SMB2_OP_TDIS:
1179 if (!NT_STATUS_IS_OK(session_status)) {
1180 return_value = smbd_smb2_request_error(req, session_status);
1181 break;
1182 }
1183 status = smbd_smb2_request_check_tcon(req);
1184 if (!NT_STATUS_IS_OK(status)) {
1185 return_value = smbd_smb2_request_error(req, status);
1186 break;
1187 }
1188
1189 {
1190 START_PROFILE(smb2_tdis);
1191 return_value = smbd_smb2_request_process_tdis(req);
1192 END_PROFILE(smb2_tdis);
1193 }
1194 break;
1195
1196 case SMB2_OP_CREATE:
1197 if (!NT_STATUS_IS_OK(session_status)) {
1198 return_value = smbd_smb2_request_error(req, session_status);
1199 break;
1200 }
1201 status = smbd_smb2_request_check_tcon(req);
1202 if (!NT_STATUS_IS_OK(status)) {
1203 return_value = smbd_smb2_request_error(req, status);
1204 break;
1205 }
1206
1207 {
1208 START_PROFILE(smb2_create);
1209 return_value = smbd_smb2_request_process_create(req);
1210 END_PROFILE(smb2_create);
1211 }
1212 break;
1213
1214 case SMB2_OP_CLOSE:
1215 if (!NT_STATUS_IS_OK(session_status)) {
1216 return_value = smbd_smb2_request_error(req, session_status);
1217 break;
1218 }
1219 status = smbd_smb2_request_check_tcon(req);
1220 if (!NT_STATUS_IS_OK(status)) {
1221 return_value = smbd_smb2_request_error(req, status);
1222 break;
1223 }
1224
1225 {
1226 START_PROFILE(smb2_close);
1227 return_value = smbd_smb2_request_process_close(req);
1228 END_PROFILE(smb2_close);
1229 }
1230 break;
1231
1232 case SMB2_OP_FLUSH:
1233 if (!NT_STATUS_IS_OK(session_status)) {
1234 return_value = smbd_smb2_request_error(req, session_status);
1235 break;
1236 }
1237 status = smbd_smb2_request_check_tcon(req);
1238 if (!NT_STATUS_IS_OK(status)) {
1239 return_value = smbd_smb2_request_error(req, status);
1240 break;
1241 }
1242
1243 {
1244 START_PROFILE(smb2_flush);
1245 return_value = smbd_smb2_request_process_flush(req);
1246 END_PROFILE(smb2_flush);
1247 }
1248 break;
1249
1250 case SMB2_OP_READ:
1251 if (!NT_STATUS_IS_OK(session_status)) {
1252 return_value = smbd_smb2_request_error(req, session_status);
1253 break;
1254 }
1255 status = smbd_smb2_request_check_tcon(req);
1256 if (!NT_STATUS_IS_OK(status)) {
1257 return_value = smbd_smb2_request_error(req, status);
1258 break;
1259 }
1260
1261 {
1262 START_PROFILE(smb2_read);
1263 return_value = smbd_smb2_request_process_read(req);
1264 END_PROFILE(smb2_read);
1265 }
1266 break;
1267
1268 case SMB2_OP_WRITE:
1269 if (!NT_STATUS_IS_OK(session_status)) {
1270 return_value = smbd_smb2_request_error(req, session_status);
1271 break;
1272 }
1273 status = smbd_smb2_request_check_tcon(req);
1274 if (!NT_STATUS_IS_OK(status)) {
1275 return_value = smbd_smb2_request_error(req, status);
1276 break;
1277 }
1278
1279 {
1280 START_PROFILE(smb2_write);
1281 return_value = smbd_smb2_request_process_write(req);
1282 END_PROFILE(smb2_write);
1283 }
1284 break;
1285
1286 case SMB2_OP_LOCK:
1287 if (!NT_STATUS_IS_OK(session_status)) {
1288 /* Too ugly to live ? JRA. */
1289 if (NT_STATUS_EQUAL(session_status,NT_STATUS_USER_SESSION_DELETED)) {
1290 session_status = NT_STATUS_FILE_CLOSED;
1291 }
1292 return_value = smbd_smb2_request_error(req, session_status);
1293 break;
1294 }
1295 status = smbd_smb2_request_check_tcon(req);
1296 if (!NT_STATUS_IS_OK(status)) {
1297 /* Too ugly to live ? JRA. */
1298 if (NT_STATUS_EQUAL(status,NT_STATUS_NETWORK_NAME_DELETED)) {
1299 status = NT_STATUS_FILE_CLOSED;
1300 }
1301 return_value = smbd_smb2_request_error(req, status);
1302 break;
1303 }
1304
1305 {
1306 START_PROFILE(smb2_lock);
1307 return_value = smbd_smb2_request_process_lock(req);
1308 END_PROFILE(smb2_lock);
1309 }
1310 break;
1311
1312 case SMB2_OP_IOCTL:
1313 if (!NT_STATUS_IS_OK(session_status)) {
1314 return_value = smbd_smb2_request_error(req, session_status);
1315 break;
1316 }
1317 status = smbd_smb2_request_check_tcon(req);
1318 if (!NT_STATUS_IS_OK(status)) {
1319 return_value = smbd_smb2_request_error(req, status);
1320 break;
1321 }
1322
1323 {
1324 START_PROFILE(smb2_ioctl);
1325 return_value = smbd_smb2_request_process_ioctl(req);
1326 END_PROFILE(smb2_ioctl);
1327 }
1328 break;
1329
1330 case SMB2_OP_CANCEL:
1331 {
1332 START_PROFILE(smb2_cancel);
1333 return_value = smbd_smb2_request_process_cancel(req);
1334 END_PROFILE(smb2_cancel);
1335 }
1336 break;
1337
1338 case SMB2_OP_KEEPALIVE:
1339 {START_PROFILE(smb2_keepalive);
1340 return_value = smbd_smb2_request_process_keepalive(req);
1341 END_PROFILE(smb2_keepalive);}
1342 break;
1343
1344 case SMB2_OP_FIND:
1345 if (!NT_STATUS_IS_OK(session_status)) {
1346 return_value = smbd_smb2_request_error(req, session_status);
1347 break;
1348 }
1349 status = smbd_smb2_request_check_tcon(req);
1350 if (!NT_STATUS_IS_OK(status)) {
1351 return_value = smbd_smb2_request_error(req, status);
1352 break;
1353 }
1354
1355 {
1356 START_PROFILE(smb2_find);
1357 return_value = smbd_smb2_request_process_find(req);
1358 END_PROFILE(smb2_find);
1359 }
1360 break;
1361
1362 case SMB2_OP_NOTIFY:
1363 if (!NT_STATUS_IS_OK(session_status)) {
1364 return_value = smbd_smb2_request_error(req, session_status);
1365 break;
1366 }
1367 status = smbd_smb2_request_check_tcon(req);
1368 if (!NT_STATUS_IS_OK(status)) {
1369 return_value = smbd_smb2_request_error(req, status);
1370 break;
1371 }
1372
1373 {
1374 START_PROFILE(smb2_notify);
1375 return_value = smbd_smb2_request_process_notify(req);
1376 END_PROFILE(smb2_notify);
1377 }
1378 break;
1379
1380 case SMB2_OP_GETINFO:
1381 if (!NT_STATUS_IS_OK(session_status)) {
1382 return_value = smbd_smb2_request_error(req, session_status);
1383 break;
1384 }
1385 status = smbd_smb2_request_check_tcon(req);
1386 if (!NT_STATUS_IS_OK(status)) {
1387 return_value = smbd_smb2_request_error(req, status);
1388 break;
1389 }
1390
1391 {
1392 START_PROFILE(smb2_getinfo);
1393 return_value = smbd_smb2_request_process_getinfo(req);
1394 END_PROFILE(smb2_getinfo);
1395 }
1396 break;
1397
1398 case SMB2_OP_SETINFO:
1399 if (!NT_STATUS_IS_OK(session_status)) {
1400 return_value = smbd_smb2_request_error(req, session_status);
1401 break;
1402 }
1403 status = smbd_smb2_request_check_tcon(req);
1404 if (!NT_STATUS_IS_OK(status)) {
1405 return_value = smbd_smb2_request_error(req, status);
1406 break;
1407 }
1408
1409 {
1410 START_PROFILE(smb2_setinfo);
1411 return_value = smbd_smb2_request_process_setinfo(req);
1412 END_PROFILE(smb2_setinfo);
1413 }
1414 break;
1415
1416 case SMB2_OP_BREAK:
1417 if (!NT_STATUS_IS_OK(session_status)) {
1418 return_value = smbd_smb2_request_error(req, session_status);
1419 break;
1420 }
1421 status = smbd_smb2_request_check_tcon(req);
1422 if (!NT_STATUS_IS_OK(status)) {
1423 return_value = smbd_smb2_request_error(req, status);
1424 break;
1425 }
1426
1427 {
1428 START_PROFILE(smb2_break);
1429 return_value = smbd_smb2_request_process_break(req);
1430 END_PROFILE(smb2_break);
1431 }
1432 break;
1433
1434 default:
1435 return_value = smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
1436 break;
1437 }
1438 return return_value;
1439 }
1440
1441 static NTSTATUS smbd_smb2_request_reply(struct smbd_smb2_request *req)
1442 {
1443 struct tevent_req *subreq;
1444 int i = req->current_idx;
1445
1446 req->subreq = NULL;
1447
1448 req->current_idx += 3;
1449
1450 if (req->current_idx < req->out.vector_count) {
1451 /*
1452 * We must process the remaining compound
1453 * SMB2 requests before any new incoming SMB2
1454 * requests. This is because incoming SMB2
1455 * requests may include a cancel for a
1456 * compound request we haven't processed
1457 * yet.
1458 */
1459 struct tevent_immediate *im = tevent_create_immediate(req);
1460 if (!im) {
1461 return NT_STATUS_NO_MEMORY;
1462 }
1463 tevent_schedule_immediate(im,
1464 req->sconn->smb2.event_ctx,
1465 smbd_smb2_request_dispatch_immediate,
1466 req);
1467 return NT_STATUS_OK;
1468 }
1469
1470 smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
1471
1472 /* Set credit for this operation (zero credits if this
1473 is a final reply for an async operation). */
1474 smb2_set_operation_credit(req->sconn,
1475 req->async ? NULL : &req->in.vector[i],
1476 &req->out.vector[i]);
1477
1478 if (req->do_signing) {
1479 NTSTATUS status;
1480 status = smb2_signing_sign_pdu(req->session->session_key,
1481 &req->out.vector[i], 3);
1482 if (!NT_STATUS_IS_OK(status)) {
1483 return status;
1484 }
1485 }
1486
1487 if (DEBUGLEVEL >= 10) {
1488 dbgtext("smbd_smb2_request_reply: sending...\n");
1489 print_req_vectors(req);
1490 }
1491
1492 /* I am a sick, sick man... :-). Sendfile hack ... JRA. */
1493 if (req->out.vector_count == 4 &&
1494 req->out.vector[3].iov_base == NULL &&
1495 req->out.vector[3].iov_len != 0) {
1496 /* Dynamic part is NULL. Chop it off,
1497 We're going to send it via sendfile. */
1498 req->out.vector_count -= 1;
1499 }
1500
1501 subreq = tstream_writev_queue_send(req,
1502 req->sconn->smb2.event_ctx,
1503 req->sconn->smb2.stream,
1504 req->sconn->smb2.send_queue,
1505 req->out.vector,
1506 req->out.vector_count);
1507 if (subreq == NULL) {
1508 return NT_STATUS_NO_MEMORY;
1509 }
1510 tevent_req_set_callback(subreq, smbd_smb2_request_writev_done, req);
1511 /*
1512 * We're done with this request -
1513 * move it off the "being processed" queue.
1514 */
1515 DLIST_REMOVE(req->sconn->smb2.requests, req);
1516
1517 return NT_STATUS_OK;
1518 }
1519
1520 void smbd_smb2_request_dispatch_immediate(struct tevent_context *ctx,
1521 struct tevent_immediate *im,
1522 void *private_data)
1523 {
1524 struct smbd_smb2_request *req = talloc_get_type_abort(private_data,
1525 struct smbd_smb2_request);
1526 struct smbd_server_connection *sconn = req->sconn;
1527 NTSTATUS status;
1528
1529 TALLOC_FREE(im);
1530
1531 if (DEBUGLEVEL >= 10) {
1532 DEBUG(10,("smbd_smb2_request_dispatch_immediate: idx[%d] of %d vectors\n",
1533 req->current_idx, req->in.vector_count));
1534 print_req_vectors(req);
1535 }
1536
1537 status = smbd_smb2_request_dispatch(req);
1538 if (!NT_STATUS_IS_OK(status)) {
1539 smbd_server_connection_terminate(sconn, nt_errstr(status));
1540 return;
1541 }
1542 }
1543
1544 static void smbd_smb2_request_writev_done(struct tevent_req *subreq)
1545 {
1546 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
1547 struct smbd_smb2_request);
1548 struct smbd_server_connection *sconn = req->sconn;
1549 int ret;
1550 int sys_errno;
1551
1552 ret = tstream_writev_queue_recv(subreq, &sys_errno);
1553 TALLOC_FREE(subreq);
1554 TALLOC_FREE(req);
1555 if (ret == -1) {
1556 NTSTATUS status = map_nt_error_from_unix(sys_errno);
1557 DEBUG(2,("smbd_smb2_request_writev_done: client write error %s\n",
1558 nt_errstr(status)));
1559 smbd_server_connection_terminate(sconn, nt_errstr(status));
1560 return;
1561 }
1562 }
1563
1564 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
1565 NTSTATUS status,
1566 DATA_BLOB body, DATA_BLOB *dyn,
1567 const char *location)
1568 {
1569 uint8_t *outhdr;
1570 int i = req->current_idx;
1571 uint32_t next_command_ofs;
1572
1573 DEBUG(10,("smbd_smb2_request_done_ex: "
1574 "idx[%d] status[%s] body[%u] dyn[%s:%u] at %s\n",
1575 i, nt_errstr(status), (unsigned int)body.length,
1576 dyn ? "yes": "no",
1577 (unsigned int)(dyn ? dyn->length : 0),
1578 location));
1579
1580 if (body.length < 2) {
1581 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
1582 }
1583
1584 if ((body.length % 2) != 0) {
1585 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
1586 }
1587
1588 outhdr = (uint8_t *)req->out.vector[i].iov_base;
1589
1590 next_command_ofs = IVAL(outhdr, SMB2_HDR_NEXT_COMMAND);
1591 SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
1592
1593 req->out.vector[i+1].iov_base = (void *)body.data;
1594 req->out.vector[i+1].iov_len = body.length;
1595
1596 if (dyn) {
1597 req->out.vector[i+2].iov_base = (void *)dyn->data;
1598 req->out.vector[i+2].iov_len = dyn->length;
1599 } else {
1600 req->out.vector[i+2].iov_base = NULL;
1601 req->out.vector[i+2].iov_len = 0;
1602 }
1603
1604 /* see if we need to recalculate the offset to the next response */
1605 if (next_command_ofs > 0) {
1606 next_command_ofs = SMB2_HDR_BODY;
1607 next_command_ofs += req->out.vector[i+1].iov_len;
1608 next_command_ofs += req->out.vector[i+2].iov_len;
1609 }
1610
1611 if ((next_command_ofs % 8) != 0) {
1612 size_t pad_size = 8 - (next_command_ofs % 8);
1613 if (req->out.vector[i+2].iov_len == 0) {
1614 /*
1615 * if the dyn buffer is empty
1616 * we can use it to add padding
1617 */
1618 uint8_t *pad;
1619
1620 pad = talloc_zero_array(req->out.vector,
1621 uint8_t, pad_size);
1622 if (pad == NULL) {
1623 return smbd_smb2_request_error(req,
1624 NT_STATUS_NO_MEMORY);
1625 }
1626
1627 req->out.vector[i+2].iov_base = (void *)pad;
1628 req->out.vector[i+2].iov_len = pad_size;
1629 } else {
1630 /*
1631 * For now we copy the dynamic buffer
1632 * and add the padding to the new buffer
1633 */
1634 size_t old_size;
1635 uint8_t *old_dyn;
1636 size_t new_size;
1637 uint8_t *new_dyn;
1638
1639 old_size = req->out.vector[i+2].iov_len;
1640 old_dyn = (uint8_t *)req->out.vector[i+2].iov_base;
1641
1642 new_size = old_size + pad_size;
1643 new_dyn = talloc_zero_array(req->out.vector,
1644 uint8_t, new_size);
1645 if (new_dyn == NULL) {
1646 return smbd_smb2_request_error(req,
1647 NT_STATUS_NO_MEMORY);
1648 }
1649
1650 memcpy(new_dyn, old_dyn, old_size);
1651 memset(new_dyn + old_size, 0, pad_size);
1652
1653 req->out.vector[i+2].iov_base = (void *)new_dyn;
1654 req->out.vector[i+2].iov_len = new_size;
1655 }
1656 next_command_ofs += pad_size;
1657 }
1658
1659 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
1660
1661 return smbd_smb2_request_reply(req);
1662 }
1663
1664 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
1665 NTSTATUS status,
1666 DATA_BLOB *info,
1667 const char *location)
1668 {
1669 DATA_BLOB body;
1670 int i = req->current_idx;
1671 uint8_t *outhdr = (uint8_t *)req->out.vector[i].iov_base;
1672
1673 DEBUG(10,("smbd_smb2_request_error_ex: idx[%d] status[%s] |%s| at %s\n",
1674 i, nt_errstr(status), info ? " +info" : "",
1675 location));
1676
1677 body.data = outhdr + SMB2_HDR_BODY;
1678 body.length = 8;
1679 SSVAL(body.data, 0, 9);
1680
1681 if (info) {
1682 SIVAL(body.data, 0x04, info->length);
1683 } else {
1684 /* Allocated size of req->out.vector[i].iov_base
1685 * *MUST BE* OUTVEC_ALLOC_SIZE. So we have room for
1686 * 1 byte without having to do an alloc.
1687 */
1688 info = talloc_zero_array(req->out.vector,
1689 DATA_BLOB,
1690 1);
1691 if (!info) {
1692 return NT_STATUS_NO_MEMORY;
1693 }
1694 info->data = ((uint8_t *)outhdr) +
1695 OUTVEC_ALLOC_SIZE - 1;
1696 info->length = 1;
1697 SCVAL(info->data, 0, 0);
1698 }
1699
1700 /*
1701 * if a request fails, all other remaining
1702 * compounded requests should fail too
1703 */
1704 req->next_status = NT_STATUS_INVALID_PARAMETER;
1705
1706 return smbd_smb2_request_done_ex(req, status, body, info, __location__);
1707 }
1708
1709
1710 struct smbd_smb2_send_oplock_break_state {
1711 struct smbd_server_connection *sconn;
1712 uint8_t buf[4 + SMB2_HDR_BODY + 0x18];
1713 struct iovec vector;
1714 };
1715
1716 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq);
1717
1718 NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
1719 uint64_t file_id_persistent,
1720 uint64_t file_id_volatile,
1721 uint8_t oplock_level)
1722 {
1723 struct smbd_smb2_send_oplock_break_state *state;
1724 struct tevent_req *subreq;
1725 uint8_t *hdr;
1726 uint8_t *body;
1727
1728 state = talloc(sconn, struct smbd_smb2_send_oplock_break_state);
1729 if (state == NULL) {
1730 return NT_STATUS_NO_MEMORY;
1731 }
1732 state->sconn = sconn;
1733
1734 state->vector.iov_base = (void *)state->buf;
1735 state->vector.iov_len = sizeof(state->buf);
1736
1737 _smb2_setlen(state->buf, sizeof(state->buf) - 4);
1738 hdr = state->buf + 4;
1739 body = hdr + SMB2_HDR_BODY;
1740
1741 SIVAL(hdr, 0, SMB2_MAGIC);
1742 SSVAL(hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
1743 SSVAL(hdr, SMB2_HDR_EPOCH, 0);
1744 SIVAL(hdr, SMB2_HDR_STATUS, 0);
1745 SSVAL(hdr, SMB2_HDR_OPCODE, SMB2_OP_BREAK);
1746 SSVAL(hdr, SMB2_HDR_CREDIT, 0);
1747 SIVAL(hdr, SMB2_HDR_FLAGS, SMB2_HDR_FLAG_REDIRECT);
1748 SIVAL(hdr, SMB2_HDR_NEXT_COMMAND, 0);
1749 SBVAL(hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
1750 SIVAL(hdr, SMB2_HDR_PID, 0);
1751 SIVAL(hdr, SMB2_HDR_TID, 0);
1752 SBVAL(hdr, SMB2_HDR_SESSION_ID, 0);
1753 memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
1754
1755 SSVAL(body, 0x00, 0x18);
1756
1757 SCVAL(body, 0x02, oplock_level);
1758 SCVAL(body, 0x03, 0); /* reserved */
1759 SIVAL(body, 0x04, 0); /* reserved */
1760 SBVAL(body, 0x08, file_id_persistent);
1761 SBVAL(body, 0x10, file_id_volatile);
1762
1763 subreq = tstream_writev_queue_send(state,
1764 sconn->smb2.event_ctx,
1765 sconn->smb2.stream,
1766 sconn->smb2.send_queue,
1767 &state->vector, 1);
1768 if (subreq == NULL) {
1769 return NT_STATUS_NO_MEMORY;
1770 }
1771 tevent_req_set_callback(subreq,
1772 smbd_smb2_oplock_break_writev_done,
1773 state);
1774
1775 return NT_STATUS_OK;
1776 }
1777
1778 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq)
1779 {
1780 struct smbd_smb2_send_oplock_break_state *state =
1781 tevent_req_callback_data(subreq,
1782 struct smbd_smb2_send_oplock_break_state);
1783 struct smbd_server_connection *sconn = state->sconn;
1784 int ret;
1785 int sys_errno;
1786
1787 ret = tstream_writev_queue_recv(subreq, &sys_errno);
1788 TALLOC_FREE(subreq);
1789 if (ret == -1) {
1790 NTSTATUS status = map_nt_error_from_unix(sys_errno);
1791 smbd_server_connection_terminate(sconn, nt_errstr(status));
1792 return;
1793 }
1794
1795 TALLOC_FREE(state);
1796 }
1797
1798 struct smbd_smb2_request_read_state {
1799 size_t missing;
1800 bool asked_for_header;
1801 struct smbd_smb2_request *smb2_req;
1802 };
1803
1804 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1805 void *private_data,
1806 TALLOC_CTX *mem_ctx,
1807 struct iovec **_vector,
1808 size_t *_count);
1809 static void smbd_smb2_request_read_done(struct tevent_req *subreq);
1810
1811 static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx,
1812 struct tevent_context *ev,
1813 struct smbd_server_connection *sconn)
1814 {
1815 struct tevent_req *req;
1816 struct smbd_smb2_request_read_state *state;
1817 struct tevent_req *subreq;
1818
1819 req = tevent_req_create(mem_ctx, &state,
1820 struct smbd_smb2_request_read_state);
1821 if (req == NULL) {
1822 return NULL;
1823 }
1824 state->missing = 0;
1825 state->asked_for_header = false;
1826
1827 state->smb2_req = smbd_smb2_request_allocate(state);
1828 if (tevent_req_nomem(state->smb2_req, req)) {
1829 return tevent_req_post(req, ev);
1830 }
1831 state->smb2_req->sconn = sconn;
1832
1833 subreq = tstream_readv_pdu_queue_send(state, ev, sconn->smb2.stream,
1834 sconn->smb2.recv_queue,
1835 smbd_smb2_request_next_vector,
1836 state);
1837 if (tevent_req_nomem(subreq, req)) {
1838 return tevent_req_post(req, ev);
1839 }
1840 tevent_req_set_callback(subreq, smbd_smb2_request_read_done, req);
1841
1842 return req;
1843 }
1844
1845 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
1846 void *private_data,
1847 TALLOC_CTX *mem_ctx,
1848 struct iovec **_vector,
1849 size_t *_count)
1850 {
1851 struct smbd_smb2_request_read_state *state =
1852 talloc_get_type_abort(private_data,
1853 struct smbd_smb2_request_read_state);
1854 struct smbd_smb2_request *req = state->smb2_req;
1855 struct iovec *vector;
1856 int idx = req->in.vector_count;
1857 size_t len = 0;
1858 uint8_t *buf = NULL;
1859
1860 if (req->in.vector_count == 0) {
1861 /*
1862 * first we need to get the NBT header
1863 */
1864 req->in.vector = talloc_array(req, struct iovec,
1865 req->in.vector_count + 1);
1866 if (req->in.vector == NULL) {
1867 return -1;
1868 }
1869 req->in.vector_count += 1;
1870
1871 req->in.vector[idx].iov_base = (void *)req->in.nbt_hdr;
1872 req->in.vector[idx].iov_len = 4;
1873
1874 vector = talloc_array(mem_ctx, struct iovec, 1);
1875 if (vector == NULL) {
1876 return -1;
1877 }
1878
1879 vector[0] = req->in.vector[idx];
1880
1881 *_vector = vector;
1882 *_count = 1;
1883 return 0;
1884 }
1885
1886 if (req->in.vector_count == 1) {
1887 /*
1888 * Now we analyze the NBT header
1889 */
1890 state->missing = smb2_len(req->in.vector[0].iov_base);
1891
1892 if (state->missing == 0) {
1893 /* if there're no remaining bytes, we're done */
1894 *_vector = NULL;
1895 *_count = 0;
1896 return 0;
1897 }
1898
1899 req->in.vector = talloc_realloc(req, req->in.vector,
1900 struct iovec,
1901 req->in.vector_count + 1);
1902 if (req->in.vector == NULL) {
1903 return -1;
1904 }
1905 req->in.vector_count += 1;
1906
1907 if (CVAL(req->in.vector[0].iov_base, 0) != 0) {
1908 /*
1909 * it's a special NBT message,
1910 * so get all remaining bytes
1911 */
1912 len = state->missing;
1913 } else if (state->missing < (SMB2_HDR_BODY + 2)) {
1914 /*
1915 * it's an invalid message, just read what we can get
1916 * and let the caller handle the error
1917 */
1918 len = state->missing;
1919 } else {
1920 /*
1921 * We assume it's a SMB2 request,
1922 * and we first get the header and the
1923 * first 2 bytes (the struct size) of the body
1924 */
1925 len = SMB2_HDR_BODY + 2;
1926
1927 state->asked_for_header = true;
1928 }
1929
1930 state->missing -= len;
1931
1932 buf = talloc_array(req->in.vector, uint8_t, len);
1933 if (buf == NULL) {
1934 return -1;
1935 }
1936
1937 req->in.vector[idx].iov_base = (void *)buf;
1938 req->in.vector[idx].iov_len = len;
1939
1940 vector = talloc_array(mem_ctx, struct iovec, 1);
1941 if (vector == NULL) {
1942 return -1;
1943 }
1944
1945 vector[0] = req->in.vector[idx];
1946
1947 *_vector = vector;
1948 *_count = 1;
1949 return 0;
1950 }
1951
1952 if (state->missing == 0) {
1953 /* if there're no remaining bytes, we're done */
1954 *_vector = NULL;
1955 *_count = 0;
1956 return 0;
1957 }
1958
1959 if (state->asked_for_header) {
1960 const uint8_t *hdr;
1961 size_t full_size;
1962 size_t next_command_ofs;
1963 size_t body_size;
1964 uint8_t *body;
1965 size_t dyn_size;
1966 uint8_t *dyn;
1967 bool invalid = false;
1968
1969 state->asked_for_header = false;
1970
1971 /*
1972 * We got the SMB2 header and the first 2 bytes
1973 * of the body. We fix the size to just the header
1974 * and manually copy the 2 first bytes to the body section
1975 */
1976 req->in.vector[idx-1].iov_len = SMB2_HDR_BODY;
1977 hdr = (const uint8_t *)req->in.vector[idx-1].iov_base;
1978
1979 /* allocate vectors for body and dynamic areas */
1980 req->in.vector = talloc_realloc(req, req->in.vector,
1981 struct iovec,
1982 req->in.vector_count + 2);
1983 if (req->in.vector == NULL) {
1984 return -1;
1985 }
1986 req->in.vector_count += 2;
1987
1988 full_size = state->missing + SMB2_HDR_BODY + 2;
1989 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
1990 body_size = SVAL(hdr, SMB2_HDR_BODY);
1991
1992 if (next_command_ofs != 0) {
1993 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
1994 /*
1995 * this is invalid, just return a zero
1996 * body and let the caller deal with the error
1997 */
1998 invalid = true;
1999 } else if (next_command_ofs > full_size) {
2000 /*
2001 * this is invalid, just return a zero
2002 * body and let the caller deal with the error
2003 */
2004 invalid = true;
2005 } else {
2006 full_size = next_command_ofs;
2007 }
2008 }
2009
2010 if (!invalid) {
2011 if (body_size < 2) {
2012 /*
2013 * this is invalid, just return a zero
2014 * body and let the caller deal with the error
2015 */
2016 invalid = true;
2017 }
2018
2019 if ((body_size % 2) != 0) {
2020 body_size -= 1;
2021 }
2022
2023 if (body_size > (full_size - SMB2_HDR_BODY)) {
2024 /*
2025 * this is invalid, just return a zero
2026 * body and let the caller deal with the error
2027 */
2028 invalid = true;
2029 }
2030 }
2031
2032 if (invalid) {
2033 /* the caller should check this */
2034 body_size = 2;
2035 }
2036
2037 dyn_size = full_size - (SMB2_HDR_BODY + body_size);
2038
2039 state->missing -= (body_size - 2) + dyn_size;
2040
2041 body = talloc_array(req->in.vector, uint8_t, body_size);
2042 if (body == NULL) {
2043 return -1;
2044 }
2045
2046 dyn = talloc_array(req->in.vector, uint8_t, dyn_size);
2047 if (dyn == NULL) {
2048 return -1;
2049 }
2050
2051 req->in.vector[idx].iov_base = (void *)body;
2052 req->in.vector[idx].iov_len = body_size;
2053 req->in.vector[idx+1].iov_base = (void *)dyn;
2054 req->in.vector[idx+1].iov_len = dyn_size;
2055
2056 vector = talloc_array(mem_ctx, struct iovec, 2);
2057 if (vector == NULL) {
2058 return -1;
2059 }
2060
2061 /*
2062 * the first 2 bytes of the body were already fetched
2063 * together with the header
2064 */
2065 memcpy(body, hdr + SMB2_HDR_BODY, 2);
2066 vector[0].iov_base = body + 2;
2067 vector[0].iov_len = body_size - 2;
2068
2069 vector[1] = req->in.vector[idx+1];
2070
2071 *_vector = vector;
2072 *_count = 2;
2073 return 0;
2074 }
2075
2076 /*
2077 * when we endup here, we're looking for a new SMB2 request
2078 * next. And we ask for its header and the first 2 bytes of
2079 * the body (like we did for the first SMB2 request).
2080 */
2081
2082 req->in.vector = talloc_realloc(req, req->in.vector,
2083 struct iovec,
2084 req->in.vector_count + 1);
2085 if (req->in.vector == NULL) {
2086 return -1;
2087 }
2088 req->in.vector_count += 1;
2089
2090 /*
2091 * We assume it's a SMB2 request,
2092 * and we first get the header and the
2093 * first 2 bytes (the struct size) of the body
2094 */
2095 len = SMB2_HDR_BODY + 2;
2096
2097 if (len > state->missing) {
2098 /* let the caller handle the error */
2099 len = state->missing;
2100 }
2101
2102 state->missing -= len;
2103 state->asked_for_header = true;
2104
2105 buf = talloc_array(req->in.vector, uint8_t, len);
2106 if (buf == NULL) {
2107 return -1;
2108 }
2109
2110 req->in.vector[idx].iov_base = (void *)buf;
2111 req->in.vector[idx].iov_len = len;
2112
2113 vector = talloc_array(mem_ctx, struct iovec, 1);
2114 if (vector == NULL) {
2115 return -1;
2116 }
2117
2118 vector[0] = req->in.vector[idx];
2119
2120 *_vector = vector;
2121 *_count = 1;
2122 return 0;
2123 }
2124
2125 static void smbd_smb2_request_read_done(struct tevent_req *subreq)
2126 {
2127 struct tevent_req *req =
2128 tevent_req_callback_data(subreq,
2129 struct tevent_req);
2130 int ret;
2131 int sys_errno;
2132 NTSTATUS status;
2133
2134 ret = tstream_readv_pdu_queue_recv(subreq, &sys_errno);
2135 if (ret == -1) {
2136 status = map_nt_error_from_unix(sys_errno);
2137 tevent_req_nterror(req, status);
2138 return;
2139 }
2140
2141 tevent_req_done(req);
2142 }
2143
2144 static NTSTATUS smbd_smb2_request_read_recv(struct tevent_req *req,
2145 TALLOC_CTX *mem_ctx,
2146 struct smbd_smb2_request **_smb2_req)
2147 {
2148 struct smbd_smb2_request_read_state *state =
2149 tevent_req_data(req,
2150 struct smbd_smb2_request_read_state);
2151 NTSTATUS status;
2152
2153 if (tevent_req_is_nterror(req, &status)) {
2154 tevent_req_received(req);
2155 return status;
2156 }
2157
2158 talloc_steal(mem_ctx, state->smb2_req->mem_pool);
2159 *_smb2_req = state->smb2_req;
2160 tevent_req_received(req);
2161 return NT_STATUS_OK;
2162 }
2163
2164 static void smbd_smb2_request_incoming(struct tevent_req *subreq);
2165
2166 void smbd_smb2_first_negprot(struct smbd_server_connection *sconn,
2167 const uint8_t *inbuf, size_t size)
2168 {
2169 NTSTATUS status;
2170 struct smbd_smb2_request *req = NULL;
2171 struct tevent_req *subreq;
2172
2173 DEBUG(10,("smbd_smb2_first_negprot: packet length %u\n",
2174 (unsigned int)size));
2175
2176 status = smbd_initialize_smb2(sconn);
2177 if (!NT_STATUS_IS_OK(status)) {
2178 smbd_server_connection_terminate(sconn, nt_errstr(status));
2179 return;
2180 }
2181
2182 status = smbd_smb2_request_create(sconn, inbuf, size, &req);
2183 if (!NT_STATUS_IS_OK(status)) {
2184 smbd_server_connection_terminate(sconn, nt_errstr(status));
2185 return;
2186 }
2187
2188 status = smbd_smb2_request_setup_out(req);
2189 if (!NT_STATUS_IS_OK(status)) {
2190 smbd_server_connection_terminate(sconn, nt_errstr(status));
2191 return;
2192 }
2193
2194 status = smbd_smb2_request_dispatch(req);
2195 if (!NT_STATUS_IS_OK(status)) {
2196 smbd_server_connection_terminate(sconn, nt_errstr(status));
2197 return;
2198 }
2199
2200 /* ask for the next request */
2201 subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
2202 if (subreq == NULL) {
2203 smbd_server_connection_terminate(sconn, "no memory for reading");
2204 return;
2205 }
2206 tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
2207 }
2208
2209 static void smbd_smb2_request_incoming(struct tevent_req *subreq)
2210 {
2211 struct smbd_server_connection *sconn = tevent_req_callback_data(subreq,
2212 struct smbd_server_connection);
2213 NTSTATUS status;
2214 struct smbd_smb2_request *req = NULL;
2215
2216 status = smbd_smb2_request_read_recv(subreq, sconn, &req);
2217 TALLOC_FREE(subreq);
2218 if (!NT_STATUS_IS_OK(status)) {
2219 DEBUG(2,("smbd_smb2_request_incoming: client read error %s\n",
2220 nt_errstr(status)));
2221 smbd_server_connection_terminate(sconn, nt_errstr(status));
2222 return;
2223 }
2224
2225 if (req->in.nbt_hdr[0] != 0x00) {
2226 DEBUG(1,("smbd_smb2_request_incoming: ignore NBT[0x%02X] msg\n",
2227 req->in.nbt_hdr[0]));
2228 TALLOC_FREE(req);
2229 goto next;
2230 }
2231
2232 req->current_idx = 1;
2233
2234 DEBUG(10,("smbd_smb2_request_incoming: idx[%d] of %d vectors\n",
2235 req->current_idx, req->in.vector_count));
2236
2237 status = smbd_smb2_request_validate(req);
2238 if (!NT_STATUS_IS_OK(status)) {
2239 smbd_server_connection_terminate(sconn, nt_errstr(status));
2240 return;
2241 }
2242
2243 status = smbd_smb2_request_setup_out(req);
2244 if (!NT_STATUS_IS_OK(status)) {
2245 smbd_server_connection_terminate(sconn, nt_errstr(status));
2246 return;
2247 }
2248
2249 status = smbd_smb2_request_dispatch(req);
2250 if (!NT_STATUS_IS_OK(status)) {
2251 smbd_server_connection_terminate(sconn, nt_errstr(status));
2252 return;
2253 }
2254
2255 next:
2256 /* ask for the next request (this constructs the main loop) */
2257 subreq = smbd_smb2_request_read_send(sconn, sconn->smb2.event_ctx, sconn);
2258 if (subreq == NULL) {
2259 smbd_server_connection_terminate(sconn, "no memory for reading");
2260 return;
2261 }
2262 tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
2263 }
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