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s3-winbindd: pass logon parmeters down to check_sam_security()
[Samba/id10ts.git] / source3 / smbd / smb2_server.c
blob899de07c2350673b4663a5aeeb11fc30f022f1b2
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 #include "../lib/util/bitmap.h"
30 #include "../librpc/gen_ndr/krb5pac.h"
31 #include "auth.h"
32
33 #define OUTVEC_ALLOC_SIZE (SMB2_HDR_BODY + 9)
34
35 static const char *smb2_names[] = {
36 "SMB2_NEGPROT",
37 "SMB2_SESSSETUP",
38 "SMB2_LOGOFF",
39 "SMB2_TCON",
40 "SMB2_TDIS",
41 "SMB2_CREATE",
42 "SMB2_CLOSE",
43 "SMB2_FLUSH",
44 "SMB2_READ",
45 "SMB2_WRITE",
46 "SMB2_LOCK",
47 "SMB2_IOCTL",
48 "SMB2_CANCEL",
49 "SMB2_KEEPALIVE",
50 "SMB2_FIND",
51 "SMB2_NOTIFY",
52 "SMB2_GETINFO",
53 "SMB2_SETINFO",
54 "SMB2_BREAK"
55 };
56
57 const char *smb2_opcode_name(uint16_t opcode)
58 {
59 if (opcode > 0x12) {
60 return "Bad SMB2 opcode";
61 }
62 return smb2_names[opcode];
63 }
64
65 static void print_req_vectors(struct smbd_smb2_request *req)
66 {
67 int i;
68
69 for (i = 0; i < req->in.vector_count; i++) {
70 dbgtext("\treq->in.vector[%u].iov_len = %u\n",
71 (unsigned int)i,
72 (unsigned int)req->in.vector[i].iov_len);
73 }
74 for (i = 0; i < req->out.vector_count; i++) {
75 dbgtext("\treq->out.vector[%u].iov_len = %u\n",
76 (unsigned int)i,
77 (unsigned int)req->out.vector[i].iov_len);
78 }
79 }
80
81 bool smbd_is_smb2_header(const uint8_t *inbuf, size_t size)
82 {
83 if (size < (4 + SMB2_HDR_BODY)) {
84 return false;
85 }
86
87 if (IVAL(inbuf, 4) != SMB2_MAGIC) {
88 return false;
89 }
90
91 return true;
92 }
93
94 static NTSTATUS smbd_initialize_smb2(struct smbd_server_connection *sconn)
95 {
96 NTSTATUS status;
97 int ret;
98
99 TALLOC_FREE(sconn->smb1.fde);
100
101 sconn->smb2.recv_queue = tevent_queue_create(sconn, "smb2 recv queue");
102 if (sconn->smb2.recv_queue == NULL) {
103 return NT_STATUS_NO_MEMORY;
104 }
105
106 sconn->smb2.send_queue = tevent_queue_create(sconn, "smb2 send queue");
107 if (sconn->smb2.send_queue == NULL) {
108 return NT_STATUS_NO_MEMORY;
109 }
110
111 sconn->smb2.sessions.idtree = idr_init(sconn);
112 if (sconn->smb2.sessions.idtree == NULL) {
113 return NT_STATUS_NO_MEMORY;
114 }
115 sconn->smb2.sessions.limit = 0x0000FFFE;
116 sconn->smb2.sessions.list = NULL;
117 sconn->smb2.seqnum_low = 0;
118 sconn->smb2.credits_granted = 0;
119 sconn->smb2.max_credits = lp_smb2_max_credits();
120 sconn->smb2.credits_bitmap = bitmap_talloc(sconn,
121 DEFAULT_SMB2_MAX_CREDIT_BITMAP_FACTOR*sconn->smb2.max_credits);
122 if (sconn->smb2.credits_bitmap == NULL) {
123 return NT_STATUS_NO_MEMORY;
124 }
125
126 ret = tstream_bsd_existing_socket(sconn, sconn->sock,
127 &sconn->smb2.stream);
128 if (ret == -1) {
129 status = map_nt_error_from_unix(errno);
130 return status;
131 }
132
133 /* Ensure child is set to non-blocking mode */
134 set_blocking(sconn->sock, false);
135 return NT_STATUS_OK;
136 }
137
138 #define smb2_len(buf) (PVAL(buf,3)|(PVAL(buf,2)<<8)|(PVAL(buf,1)<<16))
139 #define _smb2_setlen(_buf,len) do { \
140 uint8_t *buf = (uint8_t *)_buf; \
141 buf[0] = 0; \
142 buf[1] = ((len)&0xFF0000)>>16; \
143 buf[2] = ((len)&0xFF00)>>8; \
144 buf[3] = (len)&0xFF; \
145 } while (0)
146
147 static void smb2_setup_nbt_length(struct iovec *vector, int count)
148 {
149 size_t len = 0;
150 int i;
151
152 for (i=1; i < count; i++) {
153 len += vector[i].iov_len;
154 }
155
156 _smb2_setlen(vector[0].iov_base, len);
157 }
158
159 static int smbd_smb2_request_parent_destructor(struct smbd_smb2_request **req)
160 {
161 if (*req) {
162 (*req)->parent = NULL;
163 (*req)->mem_pool = NULL;
164 }
165
166 return 0;
167 }
168
169 static int smbd_smb2_request_destructor(struct smbd_smb2_request *req)
170 {
171 if (req->parent) {
172 *req->parent = NULL;
173 talloc_free(req->mem_pool);
174 }
175
176 return 0;
177 }
178
179 static struct smbd_smb2_request *smbd_smb2_request_allocate(TALLOC_CTX *mem_ctx)
180 {
181 TALLOC_CTX *mem_pool;
182 struct smbd_smb2_request **parent;
183 struct smbd_smb2_request *req;
184
185 #if 0
186 /* Enable this to find subtle valgrind errors. */
187 mem_pool = talloc_init("smbd_smb2_request_allocate");
188 #else
189 mem_pool = talloc_pool(mem_ctx, 8192);
190 #endif
191 if (mem_pool == NULL) {
192 return NULL;
193 }
194
195 parent = talloc(mem_pool, struct smbd_smb2_request *);
196 if (parent == NULL) {
197 talloc_free(mem_pool);
198 return NULL;
199 }
200
201 req = talloc_zero(parent, struct smbd_smb2_request);
202 if (req == NULL) {
203 talloc_free(mem_pool);
204 return NULL;
205 }
206 *parent = req;
207 req->mem_pool = mem_pool;
208 req->parent = parent;
209
210 req->last_session_id = UINT64_MAX;
211 req->last_tid = UINT32_MAX;
212
213 talloc_set_destructor(parent, smbd_smb2_request_parent_destructor);
214 talloc_set_destructor(req, smbd_smb2_request_destructor);
215
216 return req;
217 }
218
219 static NTSTATUS smbd_smb2_request_create(struct smbd_server_connection *sconn,
220 const uint8_t *inbuf, size_t size,
221 struct smbd_smb2_request **_req)
222 {
223 struct smbd_smb2_request *req;
224 uint32_t protocol_version;
225 const uint8_t *inhdr = NULL;
226 off_t ofs = 0;
227 uint16_t cmd;
228 uint32_t next_command_ofs;
229
230 if (size < (4 + SMB2_HDR_BODY + 2)) {
231 DEBUG(0,("Invalid SMB2 packet length count %ld\n", (long)size));
232 return NT_STATUS_INVALID_PARAMETER;
233 }
234
235 inhdr = inbuf + 4;
236
237 protocol_version = IVAL(inhdr, SMB2_HDR_PROTOCOL_ID);
238 if (protocol_version != SMB2_MAGIC) {
239 DEBUG(0,("Invalid SMB packet: protocol prefix: 0x%08X\n",
240 protocol_version));
241 return NT_STATUS_INVALID_PARAMETER;
242 }
243
244 cmd = SVAL(inhdr, SMB2_HDR_OPCODE);
245 if (cmd != SMB2_OP_NEGPROT) {
246 DEBUG(0,("Invalid SMB packet: first request: 0x%04X\n",
247 cmd));
248 return NT_STATUS_INVALID_PARAMETER;
249 }
250
251 next_command_ofs = IVAL(inhdr, SMB2_HDR_NEXT_COMMAND);
252 if (next_command_ofs != 0) {
253 DEBUG(0,("Invalid SMB packet: next_command: 0x%08X\n",
254 next_command_ofs));
255 return NT_STATUS_INVALID_PARAMETER;
256 }
257
258 req = smbd_smb2_request_allocate(sconn);
259 if (req == NULL) {
260 return NT_STATUS_NO_MEMORY;
261 }
262 req->sconn = sconn;
263
264 talloc_steal(req, inbuf);
265
266 req->in.vector = talloc_array(req, struct iovec, 4);
267 if (req->in.vector == NULL) {
268 TALLOC_FREE(req);
269 return NT_STATUS_NO_MEMORY;
270 }
271 req->in.vector_count = 4;
272
273 memcpy(req->in.nbt_hdr, inbuf, 4);
274
275 ofs = 0;
276 req->in.vector[0].iov_base = discard_const_p(void, req->in.nbt_hdr);
277 req->in.vector[0].iov_len = 4;
278 ofs += req->in.vector[0].iov_len;
279
280 req->in.vector[1].iov_base = discard_const_p(void, (inbuf + ofs));
281 req->in.vector[1].iov_len = SMB2_HDR_BODY;
282 ofs += req->in.vector[1].iov_len;
283
284 req->in.vector[2].iov_base = discard_const_p(void, (inbuf + ofs));
285 req->in.vector[2].iov_len = SVAL(inbuf, ofs) & 0xFFFE;
286 ofs += req->in.vector[2].iov_len;
287
288 if (ofs > size) {
289 return NT_STATUS_INVALID_PARAMETER;
290 }
291
292 req->in.vector[3].iov_base = discard_const_p(void, (inbuf + ofs));
293 req->in.vector[3].iov_len = size - ofs;
294 ofs += req->in.vector[3].iov_len;
295
296 req->current_idx = 1;
297
298 *_req = req;
299 return NT_STATUS_OK;
300 }
301
302 static bool smb2_validate_message_id(struct smbd_server_connection *sconn,
303 const uint8_t *inhdr)
304 {
305 uint64_t message_id = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
306 struct bitmap *credits_bm = sconn->smb2.credits_bitmap;
307 uint16_t opcode = IVAL(inhdr, SMB2_HDR_OPCODE);
308 unsigned int bitmap_offset;
309
310 if (opcode == SMB2_OP_CANCEL) {
311 /* SMB2_CANCEL requests by definition resend messageids. */
312 return true;
313 }
314
315 if (message_id < sconn->smb2.seqnum_low ||
316 message_id > (sconn->smb2.seqnum_low +
317 (sconn->smb2.max_credits * DEFAULT_SMB2_MAX_CREDIT_BITMAP_FACTOR))) {
318 DEBUG(0,("smb2_validate_message_id: bad message_id "
319 "%llu (low = %llu, max = %lu)\n",
320 (unsigned long long)message_id,
321 (unsigned long long)sconn->smb2.seqnum_low,
322 (unsigned long)sconn->smb2.max_credits ));
323 return false;
324 }
325
326 if (sconn->smb2.credits_granted == 0) {
327 DEBUG(0,("smb2_validate_message_id: client used more "
328 "credits than granted message_id (%llu)\n",
329 (unsigned long long)message_id));
330 return false;
331 }
332
333 /* client just used a credit. */
334 sconn->smb2.credits_granted -= 1;
335
336 /* Mark the message_id as seen in the bitmap. */
337 bitmap_offset = (unsigned int)(message_id %
338 (uint64_t)(sconn->smb2.max_credits * DEFAULT_SMB2_MAX_CREDIT_BITMAP_FACTOR));
339 if (bitmap_query(credits_bm, bitmap_offset)) {
340 DEBUG(0,("smb2_validate_message_id: duplicate message_id "
341 "%llu (bm offset %u)\n",
342 (unsigned long long)message_id,
343 bitmap_offset));
344 return false;
345 }
346 bitmap_set(credits_bm, bitmap_offset);
347
348 if (message_id == sconn->smb2.seqnum_low + 1) {
349 /* Move the window forward by all the message_id's
350 already seen. */
351 while (bitmap_query(credits_bm, bitmap_offset)) {
352 DEBUG(10,("smb2_validate_message_id: clearing "
353 "id %llu (position %u) from bitmap\n",
354 (unsigned long long)(sconn->smb2.seqnum_low + 1),
355 bitmap_offset ));
356 bitmap_clear(credits_bm, bitmap_offset);
357 sconn->smb2.seqnum_low += 1;
358 bitmap_offset = (bitmap_offset + 1) %
359 (sconn->smb2.max_credits * DEFAULT_SMB2_MAX_CREDIT_BITMAP_FACTOR);
360 }
361 }
362
363 return true;
364 }
365
366 static NTSTATUS smbd_smb2_request_validate(struct smbd_smb2_request *req)
367 {
368 int count;
369 int idx;
370
371 count = req->in.vector_count;
372
373 if (count < 4) {
374 /* It's not a SMB2 request */
375 return NT_STATUS_INVALID_PARAMETER;
376 }
377
378 for (idx=1; idx < count; idx += 3) {
379 const uint8_t *inhdr = NULL;
380 uint32_t flags;
381
382 if (req->in.vector[idx].iov_len != SMB2_HDR_BODY) {
383 return NT_STATUS_INVALID_PARAMETER;
384 }
385
386 if (req->in.vector[idx+1].iov_len < 2) {
387 return NT_STATUS_INVALID_PARAMETER;
388 }
389
390 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
391
392 /* Check the SMB2 header */
393 if (IVAL(inhdr, SMB2_HDR_PROTOCOL_ID) != SMB2_MAGIC) {
394 return NT_STATUS_INVALID_PARAMETER;
395 }
396
397 if (!smb2_validate_message_id(req->sconn, inhdr)) {
398 return NT_STATUS_INVALID_PARAMETER;
399 }
400
401 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
402 if (idx == 1) {
403 /*
404 * the 1st request should never have the
405 * SMB2_HDR_FLAG_CHAINED flag set
406 */
407 if (flags & SMB2_HDR_FLAG_CHAINED) {
408 req->next_status = NT_STATUS_INVALID_PARAMETER;
409 return NT_STATUS_OK;
410 }
411 } else if (idx == 4) {
412 /*
413 * the 2nd request triggers related vs. unrelated
414 * compounded requests
415 */
416 if (flags & SMB2_HDR_FLAG_CHAINED) {
417 req->compound_related = true;
418 }
419 } else if (idx > 4) {
420 #if 0
421 /*
422 * It seems the this tests are wrong
423 * see the SMB2-COMPOUND test
424 */
425
426 /*
427 * all other requests should match the 2nd one
428 */
429 if (flags & SMB2_HDR_FLAG_CHAINED) {
430 if (!req->compound_related) {
431 req->next_status =
432 NT_STATUS_INVALID_PARAMETER;
433 return NT_STATUS_OK;
434 }
435 } else {
436 if (req->compound_related) {
437 req->next_status =
438 NT_STATUS_INVALID_PARAMETER;
439 return NT_STATUS_OK;
440 }
441 }
442 #endif
443 }
444 }
445
446 return NT_STATUS_OK;
447 }
448
449 static void smb2_set_operation_credit(struct smbd_server_connection *sconn,
450 const struct iovec *in_vector,
451 struct iovec *out_vector)
452 {
453 const uint8_t *inhdr = (const uint8_t *)in_vector->iov_base;
454 uint8_t *outhdr = (uint8_t *)out_vector->iov_base;
455 uint16_t credits_requested;
456 uint32_t out_flags;
457 uint16_t credits_granted = 0;
458
459 credits_requested = SVAL(inhdr, SMB2_HDR_CREDIT);
460 out_flags = IVAL(outhdr, SMB2_HDR_FLAGS);
461
462 SMB_ASSERT(sconn->smb2.max_credits >= sconn->smb2.credits_granted);
463
464 if (out_flags & SMB2_HDR_FLAG_ASYNC) {
465 /*
466 * In case we already send an async interim
467 * response, we should not grant
468 * credits on the final response.
469 */
470 credits_requested = 0;
471 }
472
473 if (credits_requested) {
474 uint16_t modified_credits_requested;
475 uint32_t multiplier;
476
477 /*
478 * Split up max_credits into 1/16ths, and then scale
479 * the requested credits by how many 16ths have been
480 * currently granted. Less than 1/16th == grant all
481 * requested (100%), scale down as more have been
482 * granted. Never ask for less than 1 as the client
483 * asked for at least 1. JRA.
484 */
485
486 multiplier = 16 - (((sconn->smb2.credits_granted * 16) / sconn->smb2.max_credits) % 16);
487
488 modified_credits_requested = (multiplier * credits_requested) / 16;
489 if (modified_credits_requested == 0) {
490 modified_credits_requested = 1;
491 }
492
493 /* Remember what we gave out. */
494 credits_granted = MIN(modified_credits_requested,
495 (sconn->smb2.max_credits - sconn->smb2.credits_granted));
496 }
497
498 if (credits_granted == 0 && sconn->smb2.credits_granted == 0) {
499 /* First negprot packet, or ensure the client credits can
500 never drop to zero. */
501 credits_granted = 1;
502 }
503
504 SSVAL(outhdr, SMB2_HDR_CREDIT, credits_granted);
505 sconn->smb2.credits_granted += credits_granted;
506
507 DEBUG(10,("smb2_set_operation_credit: requested %u, "
508 "granted %u, total granted %u\n",
509 (unsigned int)credits_requested,
510 (unsigned int)credits_granted,
511 (unsigned int)sconn->smb2.credits_granted ));
512 }
513
514 static void smb2_calculate_credits(const struct smbd_smb2_request *inreq,
515 struct smbd_smb2_request *outreq)
516 {
517 int count, idx;
518 uint16_t total_credits = 0;
519
520 count = outreq->out.vector_count;
521
522 for (idx=1; idx < count; idx += 3) {
523 uint8_t *outhdr = (uint8_t *)outreq->out.vector[idx].iov_base;
524 smb2_set_operation_credit(outreq->sconn,
525 &inreq->in.vector[idx],
526 &outreq->out.vector[idx]);
527 /* To match Windows, count up what we
528 just granted. */
529 total_credits += SVAL(outhdr, SMB2_HDR_CREDIT);
530 /* Set to zero in all but the last reply. */
531 if (idx + 3 < count) {
532 SSVAL(outhdr, SMB2_HDR_CREDIT, 0);
533 } else {
534 SSVAL(outhdr, SMB2_HDR_CREDIT, total_credits);
535 }
536 }
537 }
538
539 static NTSTATUS smbd_smb2_request_setup_out(struct smbd_smb2_request *req)
540 {
541 struct iovec *vector;
542 int count;
543 int idx;
544
545 count = req->in.vector_count;
546 vector = talloc_zero_array(req, struct iovec, count);
547 if (vector == NULL) {
548 return NT_STATUS_NO_MEMORY;
549 }
550
551 vector[0].iov_base = req->out.nbt_hdr;
552 vector[0].iov_len = 4;
553 SIVAL(req->out.nbt_hdr, 0, 0);
554
555 for (idx=1; idx < count; idx += 3) {
556 const uint8_t *inhdr = NULL;
557 uint8_t *outhdr = NULL;
558 uint8_t *outbody = NULL;
559 uint32_t next_command_ofs = 0;
560 struct iovec *current = &vector[idx];
561
562 if ((idx + 3) < count) {
563 /* we have a next command -
564 * setup for the error case. */
565 next_command_ofs = SMB2_HDR_BODY + 9;
566 }
567
568 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
569
570 outhdr = talloc_zero_array(vector, uint8_t,
571 OUTVEC_ALLOC_SIZE);
572 if (outhdr == NULL) {
573 return NT_STATUS_NO_MEMORY;
574 }
575
576 outbody = outhdr + SMB2_HDR_BODY;
577
578 current[0].iov_base = (void *)outhdr;
579 current[0].iov_len = SMB2_HDR_BODY;
580
581 current[1].iov_base = (void *)outbody;
582 current[1].iov_len = 8;
583
584 current[2].iov_base = NULL;
585 current[2].iov_len = 0;
586
587 /* setup the SMB2 header */
588 SIVAL(outhdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
589 SSVAL(outhdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
590 SSVAL(outhdr, SMB2_HDR_CREDIT_CHARGE,
591 SVAL(inhdr, SMB2_HDR_CREDIT_CHARGE));
592 SIVAL(outhdr, SMB2_HDR_STATUS,
593 NT_STATUS_V(NT_STATUS_INTERNAL_ERROR));
594 SSVAL(outhdr, SMB2_HDR_OPCODE,
595 SVAL(inhdr, SMB2_HDR_OPCODE));
596 SIVAL(outhdr, SMB2_HDR_FLAGS,
597 IVAL(inhdr, SMB2_HDR_FLAGS) | SMB2_HDR_FLAG_REDIRECT);
598 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
599 SBVAL(outhdr, SMB2_HDR_MESSAGE_ID,
600 BVAL(inhdr, SMB2_HDR_MESSAGE_ID));
601 SIVAL(outhdr, SMB2_HDR_PID,
602 IVAL(inhdr, SMB2_HDR_PID));
603 SIVAL(outhdr, SMB2_HDR_TID,
604 IVAL(inhdr, SMB2_HDR_TID));
605 SBVAL(outhdr, SMB2_HDR_SESSION_ID,
606 BVAL(inhdr, SMB2_HDR_SESSION_ID));
607 memcpy(outhdr + SMB2_HDR_SIGNATURE,
608 inhdr + SMB2_HDR_SIGNATURE, 16);
609
610 /* setup error body header */
611 SSVAL(outbody, 0x00, 0x08 + 1);
612 SSVAL(outbody, 0x02, 0);
613 SIVAL(outbody, 0x04, 0);
614 }
615
616 req->out.vector = vector;
617 req->out.vector_count = count;
618
619 /* setup the length of the NBT packet */
620 smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
621
622 DLIST_ADD_END(req->sconn->smb2.requests, req, struct smbd_smb2_request *);
623
624 return NT_STATUS_OK;
625 }
626
627 void smbd_server_connection_terminate_ex(struct smbd_server_connection *sconn,
628 const char *reason,
629 const char *location)
630 {
631 DEBUG(10,("smbd_server_connection_terminate_ex: reason[%s] at %s\n",
632 reason, location));
633 exit_server_cleanly(reason);
634 }
635
636 static bool dup_smb2_vec3(TALLOC_CTX *ctx,
637 struct iovec *outvec,
638 const struct iovec *srcvec)
639 {
640 /* vec[0] is always boilerplate and must
641 * be allocated with size OUTVEC_ALLOC_SIZE. */
642
643 outvec[0].iov_base = talloc_memdup(ctx,
644 srcvec[0].iov_base,
645 OUTVEC_ALLOC_SIZE);
646 if (!outvec[0].iov_base) {
647 return false;
648 }
649 outvec[0].iov_len = SMB2_HDR_BODY;
650
651 /*
652 * If this is a "standard" vec[1] of length 8,
653 * pointing to srcvec[0].iov_base + SMB2_HDR_BODY,
654 * then duplicate this. Else use talloc_memdup().
655 */
656
657 if (srcvec[1].iov_len == 8 &&
658 srcvec[1].iov_base ==
659 ((uint8_t *)srcvec[0].iov_base) +
660 SMB2_HDR_BODY) {
661 outvec[1].iov_base = ((uint8_t *)outvec[0].iov_base) +
662 SMB2_HDR_BODY;
663 outvec[1].iov_len = 8;
664 } else {
665 outvec[1].iov_base = talloc_memdup(ctx,
666 srcvec[1].iov_base,
667 srcvec[1].iov_len);
668 if (!outvec[1].iov_base) {
669 return false;
670 }
671 outvec[1].iov_len = srcvec[1].iov_len;
672 }
673
674 /*
675 * If this is a "standard" vec[2] of length 1,
676 * pointing to srcvec[0].iov_base + (OUTVEC_ALLOC_SIZE - 1)
677 * then duplicate this. Else use talloc_memdup().
678 */
679
680 if (srcvec[2].iov_base &&
681 srcvec[2].iov_len) {
682 if (srcvec[2].iov_base ==
683 ((uint8_t *)srcvec[0].iov_base) +
684 (OUTVEC_ALLOC_SIZE - 1) &&
685 srcvec[2].iov_len == 1) {
686 /* Common SMB2 error packet case. */
687 outvec[2].iov_base = ((uint8_t *)outvec[0].iov_base) +
688 (OUTVEC_ALLOC_SIZE - 1);
689 } else {
690 outvec[2].iov_base = talloc_memdup(ctx,
691 srcvec[2].iov_base,
692 srcvec[2].iov_len);
693 if (!outvec[2].iov_base) {
694 return false;
695 }
696 }
697 outvec[2].iov_len = srcvec[2].iov_len;
698 } else {
699 outvec[2].iov_base = NULL;
700 outvec[2].iov_len = 0;
701 }
702 return true;
703 }
704
705 static struct smbd_smb2_request *dup_smb2_req(const struct smbd_smb2_request *req)
706 {
707 struct smbd_smb2_request *newreq = NULL;
708 struct iovec *outvec = NULL;
709 int count = req->out.vector_count;
710 int i;
711
712 newreq = smbd_smb2_request_allocate(req->sconn);
713 if (!newreq) {
714 return NULL;
715 }
716
717 newreq->sconn = req->sconn;
718 newreq->session = req->session;
719 newreq->do_signing = req->do_signing;
720 newreq->current_idx = req->current_idx;
721
722 outvec = talloc_zero_array(newreq, struct iovec, count);
723 if (!outvec) {
724 TALLOC_FREE(newreq);
725 return NULL;
726 }
727 newreq->out.vector = outvec;
728 newreq->out.vector_count = count;
729
730 /* Setup the outvec's identically to req. */
731 outvec[0].iov_base = newreq->out.nbt_hdr;
732 outvec[0].iov_len = 4;
733 memcpy(newreq->out.nbt_hdr, req->out.nbt_hdr, 4);
734
735 /* Setup the vectors identically to the ones in req. */
736 for (i = 1; i < count; i += 3) {
737 if (!dup_smb2_vec3(outvec, &outvec[i], &req->out.vector[i])) {
738 break;
739 }
740 }
741
742 if (i < count) {
743 /* Alloc failed. */
744 TALLOC_FREE(newreq);
745 return NULL;
746 }
747
748 smb2_setup_nbt_length(newreq->out.vector,
749 newreq->out.vector_count);
750
751 return newreq;
752 }
753
754 static void smbd_smb2_request_writev_done(struct tevent_req *subreq);
755
756 static NTSTATUS smb2_send_async_interim_response(const struct smbd_smb2_request *req)
757 {
758 int i = 0;
759 uint8_t *outhdr = NULL;
760 struct smbd_smb2_request *nreq = NULL;
761
762 /* Create a new smb2 request we'll use
763 for the interim return. */
764 nreq = dup_smb2_req(req);
765 if (!nreq) {
766 return NT_STATUS_NO_MEMORY;
767 }
768
769 /* Lose the last 3 out vectors. They're the
770 ones we'll be using for the async reply. */
771 nreq->out.vector_count -= 3;
772
773 smb2_setup_nbt_length(nreq->out.vector,
774 nreq->out.vector_count);
775
776 /* Step back to the previous reply. */
777 i = nreq->current_idx - 3;
778 outhdr = (uint8_t *)nreq->out.vector[i].iov_base;
779 /* And end the chain. */
780 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, 0);
781
782 /* Calculate outgoing credits */
783 smb2_calculate_credits(req, nreq);
784
785 /* Re-sign if needed. */
786 if (nreq->do_signing) {
787 NTSTATUS status;
788 status = smb2_signing_sign_pdu(nreq->session->session_key,
789 &nreq->out.vector[i], 3);
790 if (!NT_STATUS_IS_OK(status)) {
791 return status;
792 }
793 }
794 if (DEBUGLEVEL >= 10) {
795 dbgtext("smb2_send_async_interim_response: nreq->current_idx = %u\n",
796 (unsigned int)nreq->current_idx );
797 dbgtext("smb2_send_async_interim_response: returning %u vectors\n",
798 (unsigned int)nreq->out.vector_count );
799 print_req_vectors(nreq);
800 }
801 nreq->subreq = tstream_writev_queue_send(nreq,
802 nreq->sconn->ev_ctx,
803 nreq->sconn->smb2.stream,
804 nreq->sconn->smb2.send_queue,
805 nreq->out.vector,
806 nreq->out.vector_count);
807
808 if (nreq->subreq == NULL) {
809 return NT_STATUS_NO_MEMORY;
810 }
811
812 tevent_req_set_callback(nreq->subreq,
813 smbd_smb2_request_writev_done,
814 nreq);
815
816 return NT_STATUS_OK;
817 }
818
819 struct smbd_smb2_request_pending_state {
820 struct smbd_server_connection *sconn;
821 uint8_t buf[4 + SMB2_HDR_BODY + 0x08 + 1];
822 struct iovec vector[3];
823 };
824
825 static void smbd_smb2_request_pending_writev_done(struct tevent_req *subreq)
826 {
827 struct smbd_smb2_request_pending_state *state =
828 tevent_req_callback_data(subreq,
829 struct smbd_smb2_request_pending_state);
830 struct smbd_server_connection *sconn = state->sconn;
831 int ret;
832 int sys_errno;
833
834 ret = tstream_writev_queue_recv(subreq, &sys_errno);
835 TALLOC_FREE(subreq);
836 if (ret == -1) {
837 NTSTATUS status = map_nt_error_from_unix(sys_errno);
838 smbd_server_connection_terminate(sconn, nt_errstr(status));
839 return;
840 }
841
842 TALLOC_FREE(state);
843 }
844
845 static void smbd_smb2_request_pending_timer(struct tevent_context *ev,
846 struct tevent_timer *te,
847 struct timeval current_time,
848 void *private_data);
849
850 NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req,
851 struct tevent_req *subreq,
852 uint32_t defer_time)
853 {
854 NTSTATUS status;
855 int i = req->current_idx;
856 struct timeval defer_endtime;
857 uint8_t *outhdr = NULL;
858 uint32_t flags;
859
860 if (!tevent_req_is_in_progress(subreq)) {
861 return NT_STATUS_OK;
862 }
863
864 req->subreq = subreq;
865 subreq = NULL;
866
867 if (req->async_te) {
868 /* We're already async. */
869 return NT_STATUS_OK;
870 }
871
872 outhdr = (uint8_t *)req->out.vector[i].iov_base;
873 flags = IVAL(outhdr, SMB2_HDR_FLAGS);
874 if (flags & SMB2_HDR_FLAG_ASYNC) {
875 /* We're already async. */
876 return NT_STATUS_OK;
877 }
878
879 if (req->in.vector_count > i + 3) {
880 /*
881 * We're trying to go async in a compound
882 * request chain. This is not allowed.
883 * Cancel the outstanding request.
884 */
885 tevent_req_cancel(req->subreq);
886 return smbd_smb2_request_error(req,
887 NT_STATUS_INSUFFICIENT_RESOURCES);
888 }
889
890 if (DEBUGLEVEL >= 10) {
891 dbgtext("smbd_smb2_request_pending_queue: req->current_idx = %u\n",
892 (unsigned int)req->current_idx );
893 print_req_vectors(req);
894 }
895
896 if (req->out.vector_count > 4) {
897 struct iovec *outvec = NULL;
898
899 /* This is a compound reply. We
900 * must do an interim response
901 * followed by the async response
902 * to match W2K8R2.
903 */
904 status = smb2_send_async_interim_response(req);
905 if (!NT_STATUS_IS_OK(status)) {
906 return status;
907 }
908
909 /*
910 * We're splitting off the last SMB2
911 * request in a compound set, and the
912 * smb2_send_async_interim_response()
913 * call above just sent all the replies
914 * for the previous SMB2 requests in
915 * this compound set. So we're no longer
916 * in the "compound_related_in_progress"
917 * state, and this is no longer a compound
918 * request.
919 */
920 req->compound_related = false;
921 req->sconn->smb2.compound_related_in_progress = false;
922
923 /* Re-arrange the in.vectors. */
924 req->in.vector[1] = req->in.vector[i];
925 req->in.vector[2] = req->in.vector[i+1];
926 req->in.vector[3] = req->in.vector[i+2];
927 req->in.vector_count = 4;
928
929 /* Reset the new in size. */
930 smb2_setup_nbt_length(req->in.vector, 4);
931
932 /* Now recreate the out.vectors. */
933 outvec = talloc_zero_array(req, struct iovec, 4);
934 if (!outvec) {
935 return NT_STATUS_NO_MEMORY;
936 }
937
938 /* 0 is always boilerplate and must
939 * be of size 4 for the length field. */
940
941 outvec[0].iov_base = req->out.nbt_hdr;
942 outvec[0].iov_len = 4;
943 SIVAL(req->out.nbt_hdr, 0, 0);
944
945 if (!dup_smb2_vec3(outvec, &outvec[1], &req->out.vector[i])) {
946 return NT_STATUS_NO_MEMORY;
947 }
948
949 TALLOC_FREE(req->out.vector);
950
951 req->out.vector = outvec;
952
953 req->current_idx = 1;
954 req->out.vector_count = 4;
955
956 outhdr = (uint8_t *)req->out.vector[1].iov_base;
957 flags = (IVAL(outhdr, SMB2_HDR_FLAGS) & ~SMB2_HDR_FLAG_CHAINED);
958 SIVAL(outhdr, SMB2_HDR_FLAGS, flags);
959 }
960
961 defer_endtime = timeval_current_ofs_usec(defer_time);
962 req->async_te = tevent_add_timer(req->sconn->ev_ctx,
963 req, defer_endtime,
964 smbd_smb2_request_pending_timer,
965 req);
966 if (req->async_te == NULL) {
967 return NT_STATUS_NO_MEMORY;
968 }
969
970 return NT_STATUS_OK;
971 }
972
973 static void smbd_smb2_request_pending_timer(struct tevent_context *ev,
974 struct tevent_timer *te,
975 struct timeval current_time,
976 void *private_data)
977 {
978 struct smbd_smb2_request *req =
979 talloc_get_type_abort(private_data,
980 struct smbd_smb2_request);
981 struct smbd_smb2_request_pending_state *state = NULL;
982 int i = req->current_idx;
983 uint8_t *outhdr = NULL;
984 const uint8_t *inhdr = NULL;
985 uint8_t *hdr = NULL;
986 uint8_t *body = NULL;
987 uint32_t flags = 0;
988 uint64_t message_id = 0;
989 uint64_t async_id = 0;
990 struct tevent_req *subreq = NULL;
991
992 TALLOC_FREE(req->async_te);
993
994 /* Ensure our final reply matches the interim one. */
995 inhdr = (const uint8_t *)req->in.vector[1].iov_base;
996 outhdr = (uint8_t *)req->out.vector[1].iov_base;
997 flags = IVAL(outhdr, SMB2_HDR_FLAGS);
998 message_id = BVAL(outhdr, SMB2_HDR_MESSAGE_ID);
999
1000 async_id = message_id; /* keep it simple for now... */
1001
1002 SIVAL(outhdr, SMB2_HDR_FLAGS, flags | SMB2_HDR_FLAG_ASYNC);
1003 SBVAL(outhdr, SMB2_HDR_ASYNC_ID, async_id);
1004
1005 DEBUG(10,("smbd_smb2_request_pending_queue: opcode[%s] mid %llu "
1006 "going async\n",
1007 smb2_opcode_name((uint16_t)IVAL(inhdr, SMB2_HDR_OPCODE)),
1008 (unsigned long long)async_id ));
1009
1010 /*
1011 * What we send is identical to a smbd_smb2_request_error
1012 * packet with an error status of STATUS_PENDING. Make use
1013 * of this fact sometime when refactoring. JRA.
1014 */
1015
1016 state = talloc_zero(req->sconn, struct smbd_smb2_request_pending_state);
1017 if (state == NULL) {
1018 smbd_server_connection_terminate(req->sconn,
1019 nt_errstr(NT_STATUS_NO_MEMORY));
1020 return;
1021 }
1022 state->sconn = req->sconn;
1023
1024 state->vector[0].iov_base = (void *)state->buf;
1025 state->vector[0].iov_len = 4;
1026
1027 state->vector[1].iov_base = state->buf + 4;
1028 state->vector[1].iov_len = SMB2_HDR_BODY;
1029
1030 state->vector[2].iov_base = state->buf + 4 + SMB2_HDR_BODY;
1031 state->vector[2].iov_len = 9;
1032
1033 smb2_setup_nbt_length(state->vector, 3);
1034
1035 hdr = (uint8_t *)state->vector[1].iov_base;
1036 body = (uint8_t *)state->vector[2].iov_base;
1037
1038 SIVAL(hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
1039 SSVAL(hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
1040 SSVAL(hdr, SMB2_HDR_EPOCH, 0);
1041 SIVAL(hdr, SMB2_HDR_STATUS, NT_STATUS_V(STATUS_PENDING));
1042 SSVAL(hdr, SMB2_HDR_OPCODE, SVAL(outhdr, SMB2_HDR_OPCODE));
1043
1044 SIVAL(hdr, SMB2_HDR_FLAGS, flags);
1045 SIVAL(hdr, SMB2_HDR_NEXT_COMMAND, 0);
1046 SBVAL(hdr, SMB2_HDR_MESSAGE_ID, message_id);
1047 SBVAL(hdr, SMB2_HDR_PID, async_id);
1048 SBVAL(hdr, SMB2_HDR_SESSION_ID,
1049 BVAL(outhdr, SMB2_HDR_SESSION_ID));
1050 memcpy(hdr+SMB2_HDR_SIGNATURE,
1051 outhdr+SMB2_HDR_SIGNATURE, 16);
1052
1053 SSVAL(body, 0x00, 0x08 + 1);
1054
1055 SCVAL(body, 0x02, 0);
1056 SCVAL(body, 0x03, 0);
1057 SIVAL(body, 0x04, 0);
1058 /* Match W2K8R2... */
1059 SCVAL(body, 0x08, 0x21);
1060
1061 /* Ensure we correctly go through crediting. Grant
1062 the credits now, and zero credits on the final
1063 response. */
1064 smb2_set_operation_credit(req->sconn,
1065 &req->in.vector[i],
1066 &state->vector[1]);
1067
1068 SIVAL(hdr, SMB2_HDR_FLAGS, flags | SMB2_HDR_FLAG_ASYNC);
1069
1070 if (req->do_signing) {
1071 NTSTATUS status;
1072
1073 status = smb2_signing_sign_pdu(req->session->session_key,
1074 &state->vector[1], 2);
1075 if (!NT_STATUS_IS_OK(status)) {
1076 smbd_server_connection_terminate(req->sconn,
1077 nt_errstr(status));
1078 return;
1079 }
1080 }
1081
1082 subreq = tstream_writev_queue_send(state,
1083 state->sconn->ev_ctx,
1084 state->sconn->smb2.stream,
1085 state->sconn->smb2.send_queue,
1086 state->vector,
1087 3);
1088 if (subreq == NULL) {
1089 smbd_server_connection_terminate(state->sconn,
1090 nt_errstr(NT_STATUS_NO_MEMORY));
1091 return;
1092 }
1093 tevent_req_set_callback(subreq,
1094 smbd_smb2_request_pending_writev_done,
1095 state);
1096 }
1097
1098 static NTSTATUS smbd_smb2_request_process_cancel(struct smbd_smb2_request *req)
1099 {
1100 struct smbd_server_connection *sconn = req->sconn;
1101 struct smbd_smb2_request *cur;
1102 const uint8_t *inhdr;
1103 int i = req->current_idx;
1104 uint32_t flags;
1105 uint64_t search_message_id;
1106 uint64_t search_async_id;
1107 uint64_t found_id;
1108
1109 inhdr = (const uint8_t *)req->in.vector[i].iov_base;
1110
1111 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
1112 search_message_id = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
1113 search_async_id = BVAL(inhdr, SMB2_HDR_PID);
1114
1115 /*
1116 * we don't need the request anymore
1117 * cancel requests never have a response
1118 */
1119 DLIST_REMOVE(req->sconn->smb2.requests, req);
1120 TALLOC_FREE(req);
1121
1122 for (cur = sconn->smb2.requests; cur; cur = cur->next) {
1123 const uint8_t *outhdr;
1124 uint64_t message_id;
1125 uint64_t async_id;
1126
1127 i = cur->current_idx;
1128
1129 outhdr = (const uint8_t *)cur->out.vector[i].iov_base;
1130
1131 message_id = BVAL(outhdr, SMB2_HDR_MESSAGE_ID);
1132 async_id = BVAL(outhdr, SMB2_HDR_PID);
1133
1134 if (flags & SMB2_HDR_FLAG_ASYNC) {
1135 if (search_async_id == async_id) {
1136 found_id = async_id;
1137 break;
1138 }
1139 } else {
1140 if (search_message_id == message_id) {
1141 found_id = message_id;
1142 break;
1143 }
1144 }
1145 }
1146
1147 if (cur && cur->subreq) {
1148 inhdr = (const uint8_t *)cur->in.vector[i].iov_base;
1149 DEBUG(10,("smbd_smb2_request_process_cancel: attempting to "
1150 "cancel opcode[%s] mid %llu\n",
1151 smb2_opcode_name((uint16_t)IVAL(inhdr, SMB2_HDR_OPCODE)),
1152 (unsigned long long)found_id ));
1153 tevent_req_cancel(cur->subreq);
1154 }
1155
1156 return NT_STATUS_OK;
1157 }
1158
1159 /*************************************************************
1160 Ensure an incoming tid is a valid one for us to access.
1161 Change to the associated uid credentials and chdir to the
1162 valid tid directory.
1163 *************************************************************/
1164
1165 static NTSTATUS smbd_smb2_request_check_tcon(struct smbd_smb2_request *req)
1166 {
1167 const uint8_t *inhdr;
1168 int i = req->current_idx;
1169 uint32_t in_flags;
1170 uint32_t in_tid;
1171 void *p;
1172 struct smbd_smb2_tcon *tcon;
1173
1174 req->tcon = NULL;
1175
1176 inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
1177
1178 in_flags = IVAL(inhdr, SMB2_HDR_FLAGS);
1179 in_tid = IVAL(inhdr, SMB2_HDR_TID);
1180
1181 if (in_flags & SMB2_HDR_FLAG_CHAINED) {
1182 in_tid = req->last_tid;
1183 }
1184
1185 /* lookup an existing session */
1186 p = idr_find(req->session->tcons.idtree, in_tid);
1187 if (p == NULL) {
1188 return NT_STATUS_NETWORK_NAME_DELETED;
1189 }
1190 tcon = talloc_get_type_abort(p, struct smbd_smb2_tcon);
1191
1192 if (!change_to_user(tcon->compat_conn,req->session->vuid)) {
1193 return NT_STATUS_ACCESS_DENIED;
1194 }
1195
1196 /* should we pass FLAG_CASELESS_PATHNAMES here? */
1197 if (!set_current_service(tcon->compat_conn, 0, true)) {
1198 return NT_STATUS_ACCESS_DENIED;
1199 }
1200
1201 req->tcon = tcon;
1202 req->last_tid = in_tid;
1203
1204 return NT_STATUS_OK;
1205 }
1206
1207 /*************************************************************
1208 Ensure an incoming session_id is a valid one for us to access.
1209 *************************************************************/
1210
1211 static NTSTATUS smbd_smb2_request_check_session(struct smbd_smb2_request *req)
1212 {
1213 const uint8_t *inhdr;
1214 int i = req->current_idx;
1215 uint32_t in_flags;
1216 uint64_t in_session_id;
1217 void *p;
1218 struct smbd_smb2_session *session;
1219
1220 req->session = NULL;
1221 req->tcon = NULL;
1222
1223 inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
1224
1225 in_flags = IVAL(inhdr, SMB2_HDR_FLAGS);
1226 in_session_id = BVAL(inhdr, SMB2_HDR_SESSION_ID);
1227
1228 if (in_flags & SMB2_HDR_FLAG_CHAINED) {
1229 in_session_id = req->last_session_id;
1230 }
1231
1232 /* lookup an existing session */
1233 p = idr_find(req->sconn->smb2.sessions.idtree, in_session_id);
1234 if (p == NULL) {
1235 return NT_STATUS_USER_SESSION_DELETED;
1236 }
1237 session = talloc_get_type_abort(p, struct smbd_smb2_session);
1238
1239 if (!NT_STATUS_IS_OK(session->status)) {
1240 return NT_STATUS_ACCESS_DENIED;
1241 }
1242
1243 set_current_user_info(session->session_info->unix_info->sanitized_username,
1244 session->session_info->unix_info->unix_name,
1245 session->session_info->info->domain_name);
1246
1247 req->session = session;
1248 req->last_session_id = in_session_id;
1249
1250 return NT_STATUS_OK;
1251 }
1252
1253 NTSTATUS smbd_smb2_request_verify_sizes(struct smbd_smb2_request *req,
1254 size_t expected_body_size)
1255 {
1256 const uint8_t *inhdr;
1257 uint16_t opcode;
1258 const uint8_t *inbody;
1259 int i = req->current_idx;
1260 size_t body_size;
1261 size_t min_dyn_size = expected_body_size & 0x00000001;
1262
1263 /*
1264 * The following should be checked already.
1265 */
1266 if ((i+2) > req->in.vector_count) {
1267 return NT_STATUS_INTERNAL_ERROR;
1268 }
1269 if (req->in.vector[i+0].iov_len != SMB2_HDR_BODY) {
1270 return NT_STATUS_INTERNAL_ERROR;
1271 }
1272 if (req->in.vector[i+1].iov_len < 2) {
1273 return NT_STATUS_INTERNAL_ERROR;
1274 }
1275
1276 inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
1277 opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
1278
1279 switch (opcode) {
1280 case SMB2_OP_IOCTL:
1281 case SMB2_OP_GETINFO:
1282 min_dyn_size = 0;
1283 break;
1284 }
1285
1286 /*
1287 * Now check the expected body size,
1288 * where the last byte might be in the
1289 * dynnamic section..
1290 */
1291 if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
1292 return NT_STATUS_INVALID_PARAMETER;
1293 }
1294 if (req->in.vector[i+2].iov_len < min_dyn_size) {
1295 return NT_STATUS_INVALID_PARAMETER;
1296 }
1297
1298 inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
1299
1300 body_size = SVAL(inbody, 0x00);
1301 if (body_size != expected_body_size) {
1302 return NT_STATUS_INVALID_PARAMETER;
1303 }
1304
1305 return NT_STATUS_OK;
1306 }
1307
1308 NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req)
1309 {
1310 const uint8_t *inhdr;
1311 int i = req->current_idx;
1312 uint16_t opcode;
1313 uint32_t flags;
1314 uint64_t mid;
1315 NTSTATUS status;
1316 NTSTATUS session_status;
1317 uint32_t allowed_flags;
1318 NTSTATUS return_value;
1319
1320 inhdr = (const uint8_t *)req->in.vector[i].iov_base;
1321
1322 /* TODO: verify more things */
1323
1324 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
1325 opcode = IVAL(inhdr, SMB2_HDR_OPCODE);
1326 mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
1327 DEBUG(10,("smbd_smb2_request_dispatch: opcode[%s] mid = %llu\n",
1328 smb2_opcode_name(opcode),
1329 (unsigned long long)mid));
1330
1331 if (get_Protocol() >= PROTOCOL_SMB2_02) {
1332 /*
1333 * once the protocol is negotiated
1334 * SMB2_OP_NEGPROT is not allowed anymore
1335 */
1336 if (opcode == SMB2_OP_NEGPROT) {
1337 /* drop the connection */
1338 return NT_STATUS_INVALID_PARAMETER;
1339 }
1340 } else {
1341 /*
1342 * if the protocol is not negotiated yet
1343 * only SMB2_OP_NEGPROT is allowed.
1344 */
1345 if (opcode != SMB2_OP_NEGPROT) {
1346 /* drop the connection */
1347 return NT_STATUS_INVALID_PARAMETER;
1348 }
1349 }
1350
1351 allowed_flags = SMB2_HDR_FLAG_CHAINED |
1352 SMB2_HDR_FLAG_SIGNED |
1353 SMB2_HDR_FLAG_DFS;
1354 if (opcode == SMB2_OP_CANCEL) {
1355 allowed_flags |= SMB2_HDR_FLAG_ASYNC;
1356 }
1357 if ((flags & ~allowed_flags) != 0) {
1358 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
1359 }
1360
1361 /*
1362 * Check if the client provided a valid session id,
1363 * if so smbd_smb2_request_check_session() calls
1364 * set_current_user_info().
1365 *
1366 * As some command don't require a valid session id
1367 * we defer the check of the session_status
1368 */
1369 session_status = smbd_smb2_request_check_session(req);
1370
1371 req->do_signing = false;
1372 if (flags & SMB2_HDR_FLAG_SIGNED) {
1373 if (!NT_STATUS_IS_OK(session_status)) {
1374 return smbd_smb2_request_error(req, session_status);
1375 }
1376
1377 req->do_signing = true;
1378 status = smb2_signing_check_pdu(req->session->session_key,
1379 &req->in.vector[i], 3);
1380 if (!NT_STATUS_IS_OK(status)) {
1381 return smbd_smb2_request_error(req, status);
1382 }
1383 } else if (opcode == SMB2_OP_CANCEL) {
1384 /* Cancel requests are allowed to skip the signing */
1385 } else if (req->session && req->session->do_signing) {
1386 return smbd_smb2_request_error(req, NT_STATUS_ACCESS_DENIED);
1387 }
1388
1389 if (flags & SMB2_HDR_FLAG_CHAINED) {
1390 /*
1391 * This check is mostly for giving the correct error code
1392 * for compounded requests.
1393 *
1394 * TODO: we may need to move this after the session
1395 * and tcon checks.
1396 */
1397 if (!NT_STATUS_IS_OK(req->next_status)) {
1398 return smbd_smb2_request_error(req, req->next_status);
1399 }
1400 } else {
1401 req->compat_chain_fsp = NULL;
1402 }
1403
1404 if (req->compound_related) {
1405 req->sconn->smb2.compound_related_in_progress = true;
1406 }
1407
1408 switch (opcode) {
1409 case SMB2_OP_NEGPROT:
1410 /* This call needs to be run as root */
1411 change_to_root_user();
1412
1413 {
1414 START_PROFILE(smb2_negprot);
1415 return_value = smbd_smb2_request_process_negprot(req);
1416 END_PROFILE(smb2_negprot);
1417 }
1418 break;
1419
1420 case SMB2_OP_SESSSETUP:
1421 /* This call needs to be run as root */
1422 change_to_root_user();
1423
1424 {
1425 START_PROFILE(smb2_sesssetup);
1426 return_value = smbd_smb2_request_process_sesssetup(req);
1427 END_PROFILE(smb2_sesssetup);
1428 }
1429 break;
1430
1431 case SMB2_OP_LOGOFF:
1432 if (!NT_STATUS_IS_OK(session_status)) {
1433 return_value = smbd_smb2_request_error(req, session_status);
1434 break;
1435 }
1436
1437 /* This call needs to be run as root */
1438 change_to_root_user();
1439
1440 {
1441 START_PROFILE(smb2_logoff);
1442 return_value = smbd_smb2_request_process_logoff(req);
1443 END_PROFILE(smb2_logoff);
1444 }
1445 break;
1446
1447 case SMB2_OP_TCON:
1448 if (!NT_STATUS_IS_OK(session_status)) {
1449 return_value = smbd_smb2_request_error(req, session_status);
1450 break;
1451 }
1452
1453 /*
1454 * This call needs to be run as root.
1455 *
1456 * smbd_smb2_request_process_tcon()
1457 * calls make_connection_snum(), which will call
1458 * change_to_user(), when needed.
1459 */
1460 change_to_root_user();
1461
1462 {
1463 START_PROFILE(smb2_tcon);
1464 return_value = smbd_smb2_request_process_tcon(req);
1465 END_PROFILE(smb2_tcon);
1466 }
1467 break;
1468
1469 case SMB2_OP_TDIS:
1470 if (!NT_STATUS_IS_OK(session_status)) {
1471 return_value = smbd_smb2_request_error(req, session_status);
1472 break;
1473 }
1474 /*
1475 * This call needs to be run as user.
1476 *
1477 * smbd_smb2_request_check_tcon()
1478 * calls change_to_user() on success.
1479 */
1480 status = smbd_smb2_request_check_tcon(req);
1481 if (!NT_STATUS_IS_OK(status)) {
1482 return_value = smbd_smb2_request_error(req, status);
1483 break;
1484 }
1485 /* This call needs to be run as root */
1486 change_to_root_user();
1487
1488
1489 {
1490 START_PROFILE(smb2_tdis);
1491 return_value = smbd_smb2_request_process_tdis(req);
1492 END_PROFILE(smb2_tdis);
1493 }
1494 break;
1495
1496 case SMB2_OP_CREATE:
1497 if (!NT_STATUS_IS_OK(session_status)) {
1498 return_value = smbd_smb2_request_error(req, session_status);
1499 break;
1500 }
1501 /*
1502 * This call needs to be run as user.
1503 *
1504 * smbd_smb2_request_check_tcon()
1505 * calls change_to_user() on success.
1506 */
1507 status = smbd_smb2_request_check_tcon(req);
1508 if (!NT_STATUS_IS_OK(status)) {
1509 return_value = smbd_smb2_request_error(req, status);
1510 break;
1511 }
1512
1513 {
1514 START_PROFILE(smb2_create);
1515 return_value = smbd_smb2_request_process_create(req);
1516 END_PROFILE(smb2_create);
1517 }
1518 break;
1519
1520 case SMB2_OP_CLOSE:
1521 if (!NT_STATUS_IS_OK(session_status)) {
1522 return_value = smbd_smb2_request_error(req, session_status);
1523 break;
1524 }
1525 /*
1526 * This call needs to be run as user.
1527 *
1528 * smbd_smb2_request_check_tcon()
1529 * calls change_to_user() on success.
1530 */
1531 status = smbd_smb2_request_check_tcon(req);
1532 if (!NT_STATUS_IS_OK(status)) {
1533 return_value = smbd_smb2_request_error(req, status);
1534 break;
1535 }
1536
1537 {
1538 START_PROFILE(smb2_close);
1539 return_value = smbd_smb2_request_process_close(req);
1540 END_PROFILE(smb2_close);
1541 }
1542 break;
1543
1544 case SMB2_OP_FLUSH:
1545 if (!NT_STATUS_IS_OK(session_status)) {
1546 return_value = smbd_smb2_request_error(req, session_status);
1547 break;
1548 }
1549 /*
1550 * This call needs to be run as user.
1551 *
1552 * smbd_smb2_request_check_tcon()
1553 * calls change_to_user() on success.
1554 */
1555 status = smbd_smb2_request_check_tcon(req);
1556 if (!NT_STATUS_IS_OK(status)) {
1557 return_value = smbd_smb2_request_error(req, status);
1558 break;
1559 }
1560
1561 {
1562 START_PROFILE(smb2_flush);
1563 return_value = smbd_smb2_request_process_flush(req);
1564 END_PROFILE(smb2_flush);
1565 }
1566 break;
1567
1568 case SMB2_OP_READ:
1569 if (!NT_STATUS_IS_OK(session_status)) {
1570 return_value = smbd_smb2_request_error(req, session_status);
1571 break;
1572 }
1573 /*
1574 * This call needs to be run as user.
1575 *
1576 * smbd_smb2_request_check_tcon()
1577 * calls change_to_user() on success.
1578 */
1579 status = smbd_smb2_request_check_tcon(req);
1580 if (!NT_STATUS_IS_OK(status)) {
1581 return_value = smbd_smb2_request_error(req, status);
1582 break;
1583 }
1584
1585 {
1586 START_PROFILE(smb2_read);
1587 return_value = smbd_smb2_request_process_read(req);
1588 END_PROFILE(smb2_read);
1589 }
1590 break;
1591
1592 case SMB2_OP_WRITE:
1593 if (!NT_STATUS_IS_OK(session_status)) {
1594 return_value = smbd_smb2_request_error(req, session_status);
1595 break;
1596 }
1597 /*
1598 * This call needs to be run as user.
1599 *
1600 * smbd_smb2_request_check_tcon()
1601 * calls change_to_user() on success.
1602 */
1603 status = smbd_smb2_request_check_tcon(req);
1604 if (!NT_STATUS_IS_OK(status)) {
1605 return_value = smbd_smb2_request_error(req, status);
1606 break;
1607 }
1608
1609 {
1610 START_PROFILE(smb2_write);
1611 return_value = smbd_smb2_request_process_write(req);
1612 END_PROFILE(smb2_write);
1613 }
1614 break;
1615
1616 case SMB2_OP_LOCK:
1617 if (!NT_STATUS_IS_OK(session_status)) {
1618 /* Too ugly to live ? JRA. */
1619 if (NT_STATUS_EQUAL(session_status,NT_STATUS_USER_SESSION_DELETED)) {
1620 session_status = NT_STATUS_FILE_CLOSED;
1621 }
1622 return_value = smbd_smb2_request_error(req, session_status);
1623 break;
1624 }
1625 /*
1626 * This call needs to be run as user.
1627 *
1628 * smbd_smb2_request_check_tcon()
1629 * calls change_to_user() on success.
1630 */
1631 status = smbd_smb2_request_check_tcon(req);
1632 if (!NT_STATUS_IS_OK(status)) {
1633 /* Too ugly to live ? JRA. */
1634 if (NT_STATUS_EQUAL(status,NT_STATUS_NETWORK_NAME_DELETED)) {
1635 status = NT_STATUS_FILE_CLOSED;
1636 }
1637 return_value = smbd_smb2_request_error(req, status);
1638 break;
1639 }
1640
1641 {
1642 START_PROFILE(smb2_lock);
1643 return_value = smbd_smb2_request_process_lock(req);
1644 END_PROFILE(smb2_lock);
1645 }
1646 break;
1647
1648 case SMB2_OP_IOCTL:
1649 if (!NT_STATUS_IS_OK(session_status)) {
1650 return_value = smbd_smb2_request_error(req, session_status);
1651 break;
1652 }
1653 /*
1654 * This call needs to be run as user.
1655 *
1656 * smbd_smb2_request_check_tcon()
1657 * calls change_to_user() on success.
1658 */
1659 status = smbd_smb2_request_check_tcon(req);
1660 if (!NT_STATUS_IS_OK(status)) {
1661 return_value = smbd_smb2_request_error(req, status);
1662 break;
1663 }
1664
1665 {
1666 START_PROFILE(smb2_ioctl);
1667 return_value = smbd_smb2_request_process_ioctl(req);
1668 END_PROFILE(smb2_ioctl);
1669 }
1670 break;
1671
1672 case SMB2_OP_CANCEL:
1673 /*
1674 * This call needs to be run as root
1675 *
1676 * That is what we also do in the SMB1 case.
1677 */
1678 change_to_root_user();
1679
1680 {
1681 START_PROFILE(smb2_cancel);
1682 return_value = smbd_smb2_request_process_cancel(req);
1683 END_PROFILE(smb2_cancel);
1684 }
1685 break;
1686
1687 case SMB2_OP_KEEPALIVE:
1688 /* This call needs to be run as root */
1689 change_to_root_user();
1690
1691 {
1692 START_PROFILE(smb2_keepalive);
1693 return_value = smbd_smb2_request_process_keepalive(req);
1694 END_PROFILE(smb2_keepalive);
1695 }
1696 break;
1697
1698 case SMB2_OP_FIND:
1699 if (!NT_STATUS_IS_OK(session_status)) {
1700 return_value = smbd_smb2_request_error(req, session_status);
1701 break;
1702 }
1703 /*
1704 * This call needs to be run as user.
1705 *
1706 * smbd_smb2_request_check_tcon()
1707 * calls change_to_user() on success.
1708 */
1709 status = smbd_smb2_request_check_tcon(req);
1710 if (!NT_STATUS_IS_OK(status)) {
1711 return_value = smbd_smb2_request_error(req, status);
1712 break;
1713 }
1714
1715 {
1716 START_PROFILE(smb2_find);
1717 return_value = smbd_smb2_request_process_find(req);
1718 END_PROFILE(smb2_find);
1719 }
1720 break;
1721
1722 case SMB2_OP_NOTIFY:
1723 if (!NT_STATUS_IS_OK(session_status)) {
1724 return_value = smbd_smb2_request_error(req, session_status);
1725 break;
1726 }
1727 /*
1728 * This call needs to be run as user.
1729 *
1730 * smbd_smb2_request_check_tcon()
1731 * calls change_to_user() on success.
1732 */
1733 status = smbd_smb2_request_check_tcon(req);
1734 if (!NT_STATUS_IS_OK(status)) {
1735 return_value = smbd_smb2_request_error(req, status);
1736 break;
1737 }
1738
1739 {
1740 START_PROFILE(smb2_notify);
1741 return_value = smbd_smb2_request_process_notify(req);
1742 END_PROFILE(smb2_notify);
1743 }
1744 break;
1745
1746 case SMB2_OP_GETINFO:
1747 if (!NT_STATUS_IS_OK(session_status)) {
1748 return_value = smbd_smb2_request_error(req, session_status);
1749 break;
1750 }
1751 /*
1752 * This call needs to be run as user.
1753 *
1754 * smbd_smb2_request_check_tcon()
1755 * calls change_to_user() on success.
1756 */
1757 status = smbd_smb2_request_check_tcon(req);
1758 if (!NT_STATUS_IS_OK(status)) {
1759 return_value = smbd_smb2_request_error(req, status);
1760 break;
1761 }
1762
1763 {
1764 START_PROFILE(smb2_getinfo);
1765 return_value = smbd_smb2_request_process_getinfo(req);
1766 END_PROFILE(smb2_getinfo);
1767 }
1768 break;
1769
1770 case SMB2_OP_SETINFO:
1771 if (!NT_STATUS_IS_OK(session_status)) {
1772 return_value = smbd_smb2_request_error(req, session_status);
1773 break;
1774 }
1775 /*
1776 * This call needs to be run as user.
1777 *
1778 * smbd_smb2_request_check_tcon()
1779 * calls change_to_user() on success.
1780 */
1781 status = smbd_smb2_request_check_tcon(req);
1782 if (!NT_STATUS_IS_OK(status)) {
1783 return_value = smbd_smb2_request_error(req, status);
1784 break;
1785 }
1786
1787 {
1788 START_PROFILE(smb2_setinfo);
1789 return_value = smbd_smb2_request_process_setinfo(req);
1790 END_PROFILE(smb2_setinfo);
1791 }
1792 break;
1793
1794 case SMB2_OP_BREAK:
1795 if (!NT_STATUS_IS_OK(session_status)) {
1796 return_value = smbd_smb2_request_error(req, session_status);
1797 break;
1798 }
1799 /*
1800 * This call needs to be run as user.
1801 *
1802 * smbd_smb2_request_check_tcon()
1803 * calls change_to_user() on success.
1804 */
1805 status = smbd_smb2_request_check_tcon(req);
1806 if (!NT_STATUS_IS_OK(status)) {
1807 return_value = smbd_smb2_request_error(req, status);
1808 break;
1809 }
1810
1811 {
1812 START_PROFILE(smb2_break);
1813 return_value = smbd_smb2_request_process_break(req);
1814 END_PROFILE(smb2_break);
1815 }
1816 break;
1817
1818 default:
1819 return_value = smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
1820 break;
1821 }
1822 return return_value;
1823 }
1824
1825 static NTSTATUS smbd_smb2_request_reply(struct smbd_smb2_request *req)
1826 {
1827 struct tevent_req *subreq;
1828 int i = req->current_idx;
1829
1830 req->subreq = NULL;
1831 TALLOC_FREE(req->async_te);
1832
1833 req->current_idx += 3;
1834
1835 if (req->current_idx < req->out.vector_count) {
1836 /*
1837 * We must process the remaining compound
1838 * SMB2 requests before any new incoming SMB2
1839 * requests. This is because incoming SMB2
1840 * requests may include a cancel for a
1841 * compound request we haven't processed
1842 * yet.
1843 */
1844 struct tevent_immediate *im = tevent_create_immediate(req);
1845 if (!im) {
1846 return NT_STATUS_NO_MEMORY;
1847 }
1848 tevent_schedule_immediate(im,
1849 req->sconn->ev_ctx,
1850 smbd_smb2_request_dispatch_immediate,
1851 req);
1852 return NT_STATUS_OK;
1853 }
1854
1855 if (req->compound_related) {
1856 req->sconn->smb2.compound_related_in_progress = false;
1857 }
1858
1859 smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
1860
1861 /* Set credit for these operations (zero credits if this
1862 is a final reply for an async operation). */
1863 smb2_calculate_credits(req, req);
1864
1865 if (req->do_signing) {
1866 NTSTATUS status;
1867 status = smb2_signing_sign_pdu(req->session->session_key,
1868 &req->out.vector[i], 3);
1869 if (!NT_STATUS_IS_OK(status)) {
1870 return status;
1871 }
1872 }
1873
1874 if (DEBUGLEVEL >= 10) {
1875 dbgtext("smbd_smb2_request_reply: sending...\n");
1876 print_req_vectors(req);
1877 }
1878
1879 /* I am a sick, sick man... :-). Sendfile hack ... JRA. */
1880 if (req->out.vector_count == 4 &&
1881 req->out.vector[3].iov_base == NULL &&
1882 req->out.vector[3].iov_len != 0) {
1883 /* Dynamic part is NULL. Chop it off,
1884 We're going to send it via sendfile. */
1885 req->out.vector_count -= 1;
1886 }
1887
1888 subreq = tstream_writev_queue_send(req,
1889 req->sconn->ev_ctx,
1890 req->sconn->smb2.stream,
1891 req->sconn->smb2.send_queue,
1892 req->out.vector,
1893 req->out.vector_count);
1894 if (subreq == NULL) {
1895 return NT_STATUS_NO_MEMORY;
1896 }
1897 tevent_req_set_callback(subreq, smbd_smb2_request_writev_done, req);
1898 /*
1899 * We're done with this request -
1900 * move it off the "being processed" queue.
1901 */
1902 DLIST_REMOVE(req->sconn->smb2.requests, req);
1903
1904 return NT_STATUS_OK;
1905 }
1906
1907 static NTSTATUS smbd_smb2_request_next_incoming(struct smbd_server_connection *sconn);
1908
1909 void smbd_smb2_request_dispatch_immediate(struct tevent_context *ctx,
1910 struct tevent_immediate *im,
1911 void *private_data)
1912 {
1913 struct smbd_smb2_request *req = talloc_get_type_abort(private_data,
1914 struct smbd_smb2_request);
1915 struct smbd_server_connection *sconn = req->sconn;
1916 NTSTATUS status;
1917
1918 TALLOC_FREE(im);
1919
1920 if (DEBUGLEVEL >= 10) {
1921 DEBUG(10,("smbd_smb2_request_dispatch_immediate: idx[%d] of %d vectors\n",
1922 req->current_idx, req->in.vector_count));
1923 print_req_vectors(req);
1924 }
1925
1926 status = smbd_smb2_request_dispatch(req);
1927 if (!NT_STATUS_IS_OK(status)) {
1928 smbd_server_connection_terminate(sconn, nt_errstr(status));
1929 return;
1930 }
1931
1932 status = smbd_smb2_request_next_incoming(sconn);
1933 if (!NT_STATUS_IS_OK(status)) {
1934 smbd_server_connection_terminate(sconn, nt_errstr(status));
1935 return;
1936 }
1937 }
1938
1939 static void smbd_smb2_request_writev_done(struct tevent_req *subreq)
1940 {
1941 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
1942 struct smbd_smb2_request);
1943 struct smbd_server_connection *sconn = req->sconn;
1944 int ret;
1945 int sys_errno;
1946 NTSTATUS status;
1947
1948 ret = tstream_writev_queue_recv(subreq, &sys_errno);
1949 TALLOC_FREE(subreq);
1950 TALLOC_FREE(req);
1951 if (ret == -1) {
1952 status = map_nt_error_from_unix(sys_errno);
1953 DEBUG(2,("smbd_smb2_request_writev_done: client write error %s\n",
1954 nt_errstr(status)));
1955 smbd_server_connection_terminate(sconn, nt_errstr(status));
1956 return;
1957 }
1958
1959 status = smbd_smb2_request_next_incoming(sconn);
1960 if (!NT_STATUS_IS_OK(status)) {
1961 smbd_server_connection_terminate(sconn, nt_errstr(status));
1962 return;
1963 }
1964 }
1965
1966 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
1967 NTSTATUS status,
1968 DATA_BLOB body, DATA_BLOB *dyn,
1969 const char *location)
1970 {
1971 uint8_t *outhdr;
1972 int i = req->current_idx;
1973 uint32_t next_command_ofs;
1974
1975 DEBUG(10,("smbd_smb2_request_done_ex: "
1976 "idx[%d] status[%s] body[%u] dyn[%s:%u] at %s\n",
1977 i, nt_errstr(status), (unsigned int)body.length,
1978 dyn ? "yes": "no",
1979 (unsigned int)(dyn ? dyn->length : 0),
1980 location));
1981
1982 if (body.length < 2) {
1983 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
1984 }
1985
1986 if ((body.length % 2) != 0) {
1987 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
1988 }
1989
1990 outhdr = (uint8_t *)req->out.vector[i].iov_base;
1991
1992 next_command_ofs = IVAL(outhdr, SMB2_HDR_NEXT_COMMAND);
1993 SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
1994
1995 req->out.vector[i+1].iov_base = (void *)body.data;
1996 req->out.vector[i+1].iov_len = body.length;
1997
1998 if (dyn) {
1999 req->out.vector[i+2].iov_base = (void *)dyn->data;
2000 req->out.vector[i+2].iov_len = dyn->length;
2001 } else {
2002 req->out.vector[i+2].iov_base = NULL;
2003 req->out.vector[i+2].iov_len = 0;
2004 }
2005
2006 /* see if we need to recalculate the offset to the next response */
2007 if (next_command_ofs > 0) {
2008 next_command_ofs = SMB2_HDR_BODY;
2009 next_command_ofs += req->out.vector[i+1].iov_len;
2010 next_command_ofs += req->out.vector[i+2].iov_len;
2011 }
2012
2013 if ((next_command_ofs % 8) != 0) {
2014 size_t pad_size = 8 - (next_command_ofs % 8);
2015 if (req->out.vector[i+2].iov_len == 0) {
2016 /*
2017 * if the dyn buffer is empty
2018 * we can use it to add padding
2019 */
2020 uint8_t *pad;
2021
2022 pad = talloc_zero_array(req->out.vector,
2023 uint8_t, pad_size);
2024 if (pad == NULL) {
2025 return smbd_smb2_request_error(req,
2026 NT_STATUS_NO_MEMORY);
2027 }
2028
2029 req->out.vector[i+2].iov_base = (void *)pad;
2030 req->out.vector[i+2].iov_len = pad_size;
2031 } else {
2032 /*
2033 * For now we copy the dynamic buffer
2034 * and add the padding to the new buffer
2035 */
2036 size_t old_size;
2037 uint8_t *old_dyn;
2038 size_t new_size;
2039 uint8_t *new_dyn;
2040
2041 old_size = req->out.vector[i+2].iov_len;
2042 old_dyn = (uint8_t *)req->out.vector[i+2].iov_base;
2043
2044 new_size = old_size + pad_size;
2045 new_dyn = talloc_zero_array(req->out.vector,
2046 uint8_t, new_size);
2047 if (new_dyn == NULL) {
2048 return smbd_smb2_request_error(req,
2049 NT_STATUS_NO_MEMORY);
2050 }
2051
2052 memcpy(new_dyn, old_dyn, old_size);
2053 memset(new_dyn + old_size, 0, pad_size);
2054
2055 req->out.vector[i+2].iov_base = (void *)new_dyn;
2056 req->out.vector[i+2].iov_len = new_size;
2057 }
2058 next_command_ofs += pad_size;
2059 }
2060
2061 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
2062
2063 return smbd_smb2_request_reply(req);
2064 }
2065
2066 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
2067 NTSTATUS status,
2068 DATA_BLOB *info,
2069 const char *location)
2070 {
2071 DATA_BLOB body;
2072 int i = req->current_idx;
2073 uint8_t *outhdr = (uint8_t *)req->out.vector[i].iov_base;
2074
2075 DEBUG(10,("smbd_smb2_request_error_ex: idx[%d] status[%s] |%s| at %s\n",
2076 i, nt_errstr(status), info ? " +info" : "",
2077 location));
2078
2079 body.data = outhdr + SMB2_HDR_BODY;
2080 body.length = 8;
2081 SSVAL(body.data, 0, 9);
2082
2083 if (info) {
2084 SIVAL(body.data, 0x04, info->length);
2085 } else {
2086 /* Allocated size of req->out.vector[i].iov_base
2087 * *MUST BE* OUTVEC_ALLOC_SIZE. So we have room for
2088 * 1 byte without having to do an alloc.
2089 */
2090 info = talloc_zero_array(req->out.vector,
2091 DATA_BLOB,
2092 1);
2093 if (!info) {
2094 return NT_STATUS_NO_MEMORY;
2095 }
2096 info->data = ((uint8_t *)outhdr) +
2097 OUTVEC_ALLOC_SIZE - 1;
2098 info->length = 1;
2099 SCVAL(info->data, 0, 0);
2100 }
2101
2102 /*
2103 * if a request fails, all other remaining
2104 * compounded requests should fail too
2105 */
2106 req->next_status = NT_STATUS_INVALID_PARAMETER;
2107
2108 return smbd_smb2_request_done_ex(req, status, body, info, __location__);
2109 }
2110
2111
2112 struct smbd_smb2_send_oplock_break_state {
2113 struct smbd_server_connection *sconn;
2114 uint8_t buf[4 + SMB2_HDR_BODY + 0x18];
2115 struct iovec vector;
2116 };
2117
2118 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq);
2119
2120 NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
2121 uint64_t file_id_persistent,
2122 uint64_t file_id_volatile,
2123 uint8_t oplock_level)
2124 {
2125 struct smbd_smb2_send_oplock_break_state *state;
2126 struct tevent_req *subreq;
2127 uint8_t *hdr;
2128 uint8_t *body;
2129
2130 state = talloc(sconn, struct smbd_smb2_send_oplock_break_state);
2131 if (state == NULL) {
2132 return NT_STATUS_NO_MEMORY;
2133 }
2134 state->sconn = sconn;
2135
2136 state->vector.iov_base = (void *)state->buf;
2137 state->vector.iov_len = sizeof(state->buf);
2138
2139 _smb2_setlen(state->buf, sizeof(state->buf) - 4);
2140 hdr = state->buf + 4;
2141 body = hdr + SMB2_HDR_BODY;
2142
2143 SIVAL(hdr, 0, SMB2_MAGIC);
2144 SSVAL(hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
2145 SSVAL(hdr, SMB2_HDR_EPOCH, 0);
2146 SIVAL(hdr, SMB2_HDR_STATUS, 0);
2147 SSVAL(hdr, SMB2_HDR_OPCODE, SMB2_OP_BREAK);
2148 SSVAL(hdr, SMB2_HDR_CREDIT, 0);
2149 SIVAL(hdr, SMB2_HDR_FLAGS, SMB2_HDR_FLAG_REDIRECT);
2150 SIVAL(hdr, SMB2_HDR_NEXT_COMMAND, 0);
2151 SBVAL(hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
2152 SIVAL(hdr, SMB2_HDR_PID, 0);
2153 SIVAL(hdr, SMB2_HDR_TID, 0);
2154 SBVAL(hdr, SMB2_HDR_SESSION_ID, 0);
2155 memset(hdr+SMB2_HDR_SIGNATURE, 0, 16);
2156
2157 SSVAL(body, 0x00, 0x18);
2158
2159 SCVAL(body, 0x02, oplock_level);
2160 SCVAL(body, 0x03, 0); /* reserved */
2161 SIVAL(body, 0x04, 0); /* reserved */
2162 SBVAL(body, 0x08, file_id_persistent);
2163 SBVAL(body, 0x10, file_id_volatile);
2164
2165 subreq = tstream_writev_queue_send(state,
2166 sconn->ev_ctx,
2167 sconn->smb2.stream,
2168 sconn->smb2.send_queue,
2169 &state->vector, 1);
2170 if (subreq == NULL) {
2171 return NT_STATUS_NO_MEMORY;
2172 }
2173 tevent_req_set_callback(subreq,
2174 smbd_smb2_oplock_break_writev_done,
2175 state);
2176
2177 return NT_STATUS_OK;
2178 }
2179
2180 static void smbd_smb2_oplock_break_writev_done(struct tevent_req *subreq)
2181 {
2182 struct smbd_smb2_send_oplock_break_state *state =
2183 tevent_req_callback_data(subreq,
2184 struct smbd_smb2_send_oplock_break_state);
2185 struct smbd_server_connection *sconn = state->sconn;
2186 int ret;
2187 int sys_errno;
2188
2189 ret = tstream_writev_queue_recv(subreq, &sys_errno);
2190 TALLOC_FREE(subreq);
2191 if (ret == -1) {
2192 NTSTATUS status = map_nt_error_from_unix(sys_errno);
2193 smbd_server_connection_terminate(sconn, nt_errstr(status));
2194 return;
2195 }
2196
2197 TALLOC_FREE(state);
2198 }
2199
2200 struct smbd_smb2_request_read_state {
2201 size_t missing;
2202 bool asked_for_header;
2203 struct smbd_smb2_request *smb2_req;
2204 };
2205
2206 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
2207 void *private_data,
2208 TALLOC_CTX *mem_ctx,
2209 struct iovec **_vector,
2210 size_t *_count);
2211 static void smbd_smb2_request_read_done(struct tevent_req *subreq);
2212
2213 static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx,
2214 struct tevent_context *ev,
2215 struct smbd_server_connection *sconn)
2216 {
2217 struct tevent_req *req;
2218 struct smbd_smb2_request_read_state *state;
2219 struct tevent_req *subreq;
2220
2221 req = tevent_req_create(mem_ctx, &state,
2222 struct smbd_smb2_request_read_state);
2223 if (req == NULL) {
2224 return NULL;
2225 }
2226 state->missing = 0;
2227 state->asked_for_header = false;
2228
2229 state->smb2_req = smbd_smb2_request_allocate(state);
2230 if (tevent_req_nomem(state->smb2_req, req)) {
2231 return tevent_req_post(req, ev);
2232 }
2233 state->smb2_req->sconn = sconn;
2234
2235 subreq = tstream_readv_pdu_queue_send(state, ev, sconn->smb2.stream,
2236 sconn->smb2.recv_queue,
2237 smbd_smb2_request_next_vector,
2238 state);
2239 if (tevent_req_nomem(subreq, req)) {
2240 return tevent_req_post(req, ev);
2241 }
2242 tevent_req_set_callback(subreq, smbd_smb2_request_read_done, req);
2243
2244 return req;
2245 }
2246
2247 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
2248 void *private_data,
2249 TALLOC_CTX *mem_ctx,
2250 struct iovec **_vector,
2251 size_t *_count)
2252 {
2253 struct smbd_smb2_request_read_state *state =
2254 talloc_get_type_abort(private_data,
2255 struct smbd_smb2_request_read_state);
2256 struct smbd_smb2_request *req = state->smb2_req;
2257 struct iovec *vector;
2258 int idx = req->in.vector_count;
2259 size_t len = 0;
2260 uint8_t *buf = NULL;
2261
2262 if (req->in.vector_count == 0) {
2263 /*
2264 * first we need to get the NBT header
2265 */
2266 req->in.vector = talloc_array(req, struct iovec,
2267 req->in.vector_count + 1);
2268 if (req->in.vector == NULL) {
2269 return -1;
2270 }
2271 req->in.vector_count += 1;
2272
2273 req->in.vector[idx].iov_base = (void *)req->in.nbt_hdr;
2274 req->in.vector[idx].iov_len = 4;
2275
2276 vector = talloc_array(mem_ctx, struct iovec, 1);
2277 if (vector == NULL) {
2278 return -1;
2279 }
2280
2281 vector[0] = req->in.vector[idx];
2282
2283 *_vector = vector;
2284 *_count = 1;
2285 return 0;
2286 }
2287
2288 if (req->in.vector_count == 1) {
2289 /*
2290 * Now we analyze the NBT header
2291 */
2292 state->missing = smb2_len(req->in.vector[0].iov_base);
2293
2294 if (state->missing == 0) {
2295 /* if there're no remaining bytes, we're done */
2296 *_vector = NULL;
2297 *_count = 0;
2298 return 0;
2299 }
2300
2301 req->in.vector = talloc_realloc(req, req->in.vector,
2302 struct iovec,
2303 req->in.vector_count + 1);
2304 if (req->in.vector == NULL) {
2305 return -1;
2306 }
2307 req->in.vector_count += 1;
2308
2309 if (CVAL(req->in.vector[0].iov_base, 0) != 0) {
2310 /*
2311 * it's a special NBT message,
2312 * so get all remaining bytes
2313 */
2314 len = state->missing;
2315 } else if (state->missing < (SMB2_HDR_BODY + 2)) {
2316 /*
2317 * it's an invalid message, just read what we can get
2318 * and let the caller handle the error
2319 */
2320 len = state->missing;
2321 } else {
2322 /*
2323 * We assume it's a SMB2 request,
2324 * and we first get the header and the
2325 * first 2 bytes (the struct size) of the body
2326 */
2327 len = SMB2_HDR_BODY + 2;
2328
2329 state->asked_for_header = true;
2330 }
2331
2332 state->missing -= len;
2333
2334 buf = talloc_array(req->in.vector, uint8_t, len);
2335 if (buf == NULL) {
2336 return -1;
2337 }
2338
2339 req->in.vector[idx].iov_base = (void *)buf;
2340 req->in.vector[idx].iov_len = len;
2341
2342 vector = talloc_array(mem_ctx, struct iovec, 1);
2343 if (vector == NULL) {
2344 return -1;
2345 }
2346
2347 vector[0] = req->in.vector[idx];
2348
2349 *_vector = vector;
2350 *_count = 1;
2351 return 0;
2352 }
2353
2354 if (state->missing == 0) {
2355 /* if there're no remaining bytes, we're done */
2356 *_vector = NULL;
2357 *_count = 0;
2358 return 0;
2359 }
2360
2361 if (state->asked_for_header) {
2362 const uint8_t *hdr;
2363 size_t full_size;
2364 size_t next_command_ofs;
2365 size_t body_size;
2366 uint8_t *body;
2367 size_t dyn_size;
2368 uint8_t *dyn;
2369 bool invalid = false;
2370
2371 state->asked_for_header = false;
2372
2373 /*
2374 * We got the SMB2 header and the first 2 bytes
2375 * of the body. We fix the size to just the header
2376 * and manually copy the 2 first bytes to the body section
2377 */
2378 req->in.vector[idx-1].iov_len = SMB2_HDR_BODY;
2379 hdr = (const uint8_t *)req->in.vector[idx-1].iov_base;
2380
2381 /* allocate vectors for body and dynamic areas */
2382 req->in.vector = talloc_realloc(req, req->in.vector,
2383 struct iovec,
2384 req->in.vector_count + 2);
2385 if (req->in.vector == NULL) {
2386 return -1;
2387 }
2388 req->in.vector_count += 2;
2389
2390 full_size = state->missing + SMB2_HDR_BODY + 2;
2391 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
2392 body_size = SVAL(hdr, SMB2_HDR_BODY);
2393
2394 if (next_command_ofs != 0) {
2395 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
2396 /*
2397 * this is invalid, just return a zero
2398 * body and let the caller deal with the error
2399 */
2400 invalid = true;
2401 } else if (next_command_ofs > full_size) {
2402 /*
2403 * this is invalid, just return a zero
2404 * body and let the caller deal with the error
2405 */
2406 invalid = true;
2407 } else {
2408 full_size = next_command_ofs;
2409 }
2410 }
2411
2412 if (!invalid) {
2413 if (body_size < 2) {
2414 /*
2415 * this is invalid, just return a zero
2416 * body and let the caller deal with the error
2417 */
2418 invalid = true;
2419 }
2420
2421 /*
2422 * Mask out the lowest bit, the "dynamic" part
2423 * of body_size.
2424 */
2425 body_size &= ~1;
2426
2427 if (body_size > (full_size - SMB2_HDR_BODY)) {
2428 /*
2429 * this is invalid, just return a zero
2430 * body and let the caller deal with the error
2431 */
2432 invalid = true;
2433 }
2434 }
2435
2436 if (invalid) {
2437 /* the caller should check this */
2438 body_size = 2;
2439 }
2440
2441 dyn_size = full_size - (SMB2_HDR_BODY + body_size);
2442
2443 state->missing -= (body_size - 2) + dyn_size;
2444
2445 body = talloc_array(req->in.vector, uint8_t, body_size);
2446 if (body == NULL) {
2447 return -1;
2448 }
2449
2450 dyn = talloc_array(req->in.vector, uint8_t, dyn_size);
2451 if (dyn == NULL) {
2452 return -1;
2453 }
2454
2455 req->in.vector[idx].iov_base = (void *)body;
2456 req->in.vector[idx].iov_len = body_size;
2457 req->in.vector[idx+1].iov_base = (void *)dyn;
2458 req->in.vector[idx+1].iov_len = dyn_size;
2459
2460 vector = talloc_array(mem_ctx, struct iovec, 2);
2461 if (vector == NULL) {
2462 return -1;
2463 }
2464
2465 /*
2466 * the first 2 bytes of the body were already fetched
2467 * together with the header
2468 */
2469 memcpy(body, hdr + SMB2_HDR_BODY, 2);
2470 vector[0].iov_base = body + 2;
2471 vector[0].iov_len = body_size - 2;
2472
2473 vector[1] = req->in.vector[idx+1];
2474
2475 *_vector = vector;
2476 *_count = 2;
2477 return 0;
2478 }
2479
2480 /*
2481 * when we endup here, we're looking for a new SMB2 request
2482 * next. And we ask for its header and the first 2 bytes of
2483 * the body (like we did for the first SMB2 request).
2484 */
2485
2486 req->in.vector = talloc_realloc(req, req->in.vector,
2487 struct iovec,
2488 req->in.vector_count + 1);
2489 if (req->in.vector == NULL) {
2490 return -1;
2491 }
2492 req->in.vector_count += 1;
2493
2494 /*
2495 * We assume it's a SMB2 request,
2496 * and we first get the header and the
2497 * first 2 bytes (the struct size) of the body
2498 */
2499 len = SMB2_HDR_BODY + 2;
2500
2501 if (len > state->missing) {
2502 /* let the caller handle the error */
2503 len = state->missing;
2504 }
2505
2506 state->missing -= len;
2507 state->asked_for_header = true;
2508
2509 buf = talloc_array(req->in.vector, uint8_t, len);
2510 if (buf == NULL) {
2511 return -1;
2512 }
2513
2514 req->in.vector[idx].iov_base = (void *)buf;
2515 req->in.vector[idx].iov_len = len;
2516
2517 vector = talloc_array(mem_ctx, struct iovec, 1);
2518 if (vector == NULL) {
2519 return -1;
2520 }
2521
2522 vector[0] = req->in.vector[idx];
2523
2524 *_vector = vector;
2525 *_count = 1;
2526 return 0;
2527 }
2528
2529 static void smbd_smb2_request_read_done(struct tevent_req *subreq)
2530 {
2531 struct tevent_req *req =
2532 tevent_req_callback_data(subreq,
2533 struct tevent_req);
2534 int ret;
2535 int sys_errno;
2536 NTSTATUS status;
2537
2538 ret = tstream_readv_pdu_queue_recv(subreq, &sys_errno);
2539 if (ret == -1) {
2540 status = map_nt_error_from_unix(sys_errno);
2541 tevent_req_nterror(req, status);
2542 return;
2543 }
2544
2545 tevent_req_done(req);
2546 }
2547
2548 static NTSTATUS smbd_smb2_request_read_recv(struct tevent_req *req,
2549 TALLOC_CTX *mem_ctx,
2550 struct smbd_smb2_request **_smb2_req)
2551 {
2552 struct smbd_smb2_request_read_state *state =
2553 tevent_req_data(req,
2554 struct smbd_smb2_request_read_state);
2555 NTSTATUS status;
2556
2557 if (tevent_req_is_nterror(req, &status)) {
2558 tevent_req_received(req);
2559 return status;
2560 }
2561
2562 talloc_steal(mem_ctx, state->smb2_req->mem_pool);
2563 *_smb2_req = state->smb2_req;
2564 tevent_req_received(req);
2565 return NT_STATUS_OK;
2566 }
2567
2568 static void smbd_smb2_request_incoming(struct tevent_req *subreq);
2569
2570 static NTSTATUS smbd_smb2_request_next_incoming(struct smbd_server_connection *sconn)
2571 {
2572 size_t max_send_queue_len;
2573 size_t cur_send_queue_len;
2574 struct tevent_req *subreq;
2575
2576 if (sconn->smb2.compound_related_in_progress) {
2577 /*
2578 * Can't read another until the related
2579 * compound is done.
2580 */
2581 return NT_STATUS_OK;
2582 }
2583
2584 if (tevent_queue_length(sconn->smb2.recv_queue) > 0) {
2585 /*
2586 * if there is already a smbd_smb2_request_read
2587 * pending, we are done.
2588 */
2589 return NT_STATUS_OK;
2590 }
2591
2592 max_send_queue_len = MAX(1, sconn->smb2.max_credits/16);
2593 cur_send_queue_len = tevent_queue_length(sconn->smb2.send_queue);
2594
2595 if (cur_send_queue_len > max_send_queue_len) {
2596 /*
2597 * if we have a lot of requests to send,
2598 * we wait until they are on the wire until we
2599 * ask for the next request.
2600 */
2601 return NT_STATUS_OK;
2602 }
2603
2604 /* ask for the next request */
2605 subreq = smbd_smb2_request_read_send(sconn, sconn->ev_ctx, sconn);
2606 if (subreq == NULL) {
2607 return NT_STATUS_NO_MEMORY;
2608 }
2609 tevent_req_set_callback(subreq, smbd_smb2_request_incoming, sconn);
2610
2611 return NT_STATUS_OK;
2612 }
2613
2614 void smbd_smb2_first_negprot(struct smbd_server_connection *sconn,
2615 const uint8_t *inbuf, size_t size)
2616 {
2617 NTSTATUS status;
2618 struct smbd_smb2_request *req = NULL;
2619
2620 DEBUG(10,("smbd_smb2_first_negprot: packet length %u\n",
2621 (unsigned int)size));
2622
2623 status = smbd_initialize_smb2(sconn);
2624 if (!NT_STATUS_IS_OK(status)) {
2625 smbd_server_connection_terminate(sconn, nt_errstr(status));
2626 return;
2627 }
2628
2629 status = smbd_smb2_request_create(sconn, inbuf, size, &req);
2630 if (!NT_STATUS_IS_OK(status)) {
2631 smbd_server_connection_terminate(sconn, nt_errstr(status));
2632 return;
2633 }
2634
2635 status = smbd_smb2_request_setup_out(req);
2636 if (!NT_STATUS_IS_OK(status)) {
2637 smbd_server_connection_terminate(sconn, nt_errstr(status));
2638 return;
2639 }
2640
2641 status = smbd_smb2_request_dispatch(req);
2642 if (!NT_STATUS_IS_OK(status)) {
2643 smbd_server_connection_terminate(sconn, nt_errstr(status));
2644 return;
2645 }
2646
2647 status = smbd_smb2_request_next_incoming(sconn);
2648 if (!NT_STATUS_IS_OK(status)) {
2649 smbd_server_connection_terminate(sconn, nt_errstr(status));
2650 return;
2651 }
2652
2653 sconn->num_requests++;
2654 }
2655
2656 static void smbd_smb2_request_incoming(struct tevent_req *subreq)
2657 {
2658 struct smbd_server_connection *sconn = tevent_req_callback_data(subreq,
2659 struct smbd_server_connection);
2660 NTSTATUS status;
2661 struct smbd_smb2_request *req = NULL;
2662
2663 status = smbd_smb2_request_read_recv(subreq, sconn, &req);
2664 TALLOC_FREE(subreq);
2665 if (!NT_STATUS_IS_OK(status)) {
2666 DEBUG(2,("smbd_smb2_request_incoming: client read error %s\n",
2667 nt_errstr(status)));
2668 smbd_server_connection_terminate(sconn, nt_errstr(status));
2669 return;
2670 }
2671
2672 if (req->in.nbt_hdr[0] != 0x00) {
2673 DEBUG(1,("smbd_smb2_request_incoming: ignore NBT[0x%02X] msg\n",
2674 req->in.nbt_hdr[0]));
2675 TALLOC_FREE(req);
2676 goto next;
2677 }
2678
2679 req->current_idx = 1;
2680
2681 DEBUG(10,("smbd_smb2_request_incoming: idx[%d] of %d vectors\n",
2682 req->current_idx, req->in.vector_count));
2683
2684 status = smbd_smb2_request_validate(req);
2685 if (!NT_STATUS_IS_OK(status)) {
2686 smbd_server_connection_terminate(sconn, nt_errstr(status));
2687 return;
2688 }
2689
2690 status = smbd_smb2_request_setup_out(req);
2691 if (!NT_STATUS_IS_OK(status)) {
2692 smbd_server_connection_terminate(sconn, nt_errstr(status));
2693 return;
2694 }
2695
2696 status = smbd_smb2_request_dispatch(req);
2697 if (!NT_STATUS_IS_OK(status)) {
2698 smbd_server_connection_terminate(sconn, nt_errstr(status));
2699 return;
2700 }
2701
2702 next:
2703 status = smbd_smb2_request_next_incoming(sconn);
2704 if (!NT_STATUS_IS_OK(status)) {
2705 smbd_server_connection_terminate(sconn, nt_errstr(status));
2706 return;
2707 }
2708
2709 sconn->num_requests++;
2710
2711 /* The timeout_processing function isn't run nearly
2712 often enough to implement 'max log size' without
2713 overrunning the size of the file by many megabytes.
2714 This is especially true if we are running at debug
2715 level 10. Checking every 50 SMB2s is a nice
2716 tradeoff of performance vs log file size overrun. */
2717
2718 if ((sconn->num_requests % 50) == 0 &&
2719 need_to_check_log_size()) {
2720 change_to_root_user();
2721 check_log_size();
2722 }
2723 }
Working branch of Samba for id10ts