2 Unix SMB/CIFS implementation.
5 Copyright (C) Stefan Metzmacher 2009
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include "smbd/globals.h"
23 #include "../source4/libcli/smb2/smb2_constants.h"
24 #include "../lib/tsocket/tsocket.h"
26 bool smbd_is_smb2_header(const uint8_t *inbuf, size_t size)
28 if (size < (4 + SMB2_HDR_BODY)) {
32 if (IVAL(inbuf, 4) != SMB2_MAGIC) {
39 static NTSTATUS smbd_initialize_smb2(struct smbd_server_connection *conn)
44 TALLOC_FREE(conn->fde);
46 conn->smb2.event_ctx = smbd_event_context();
48 conn->smb2.recv_queue = tevent_queue_create(conn, "smb2 recv queue");
49 if (conn->smb2.recv_queue == NULL) {
50 return NT_STATUS_NO_MEMORY;
53 conn->smb2.send_queue = tevent_queue_create(conn, "smb2 send queue");
54 if (conn->smb2.send_queue == NULL) {
55 return NT_STATUS_NO_MEMORY;
58 conn->smb2.sessions.idtree = idr_init(conn);
59 if (conn->smb2.sessions.idtree == NULL) {
60 return NT_STATUS_NO_MEMORY;
62 conn->smb2.sessions.limit = 0x00FFFFFF;
63 conn->smb2.sessions.list = NULL;
65 ret = tstream_bsd_existing_socket(conn, smbd_server_fd(),
68 status = map_nt_error_from_unix(errno);
72 /* Ensure child is set to non-blocking mode */
73 set_blocking(smbd_server_fd(),false);
77 #define smb2_len(buf) (PVAL(buf,3)|(PVAL(buf,2)<<8)|(PVAL(buf,1)<<16))
78 #define _smb2_setlen(_buf,len) do { \
79 uint8_t *buf = (uint8_t *)_buf; \
81 buf[1] = ((len)&0xFF0000)>>16; \
82 buf[2] = ((len)&0xFF00)>>8; \
83 buf[3] = (len)&0xFF; \
86 static void smb2_setup_nbt_length(struct iovec *vector, int count)
91 for (i=1; i < count; i++) {
92 len += vector[i].iov_len;
95 _smb2_setlen(vector[0].iov_base, len);
98 static NTSTATUS smbd_smb2_request_create(struct smbd_server_connection *conn,
99 const uint8_t *inbuf, size_t size,
100 struct smbd_smb2_request **_req)
102 TALLOC_CTX *mem_pool;
103 struct smbd_smb2_request *req;
104 uint32_t protocol_version;
105 const uint8_t *inhdr = NULL;
108 uint32_t next_command_ofs;
110 if (size < (4 + SMB2_HDR_BODY + 2)) {
111 DEBUG(0,("Invalid SMB2 packet length count %ld\n", (long)size));
112 return NT_STATUS_INVALID_PARAMETER;
117 protocol_version = IVAL(inhdr, SMB2_HDR_PROTOCOL_ID);
118 if (protocol_version != SMB2_MAGIC) {
119 DEBUG(0,("Invalid SMB packet: protocol prefix: 0x%08X\n",
121 return NT_STATUS_INVALID_PARAMETER;
124 cmd = SVAL(inhdr, SMB2_HDR_OPCODE);
125 if (cmd != SMB2_OP_NEGPROT) {
126 DEBUG(0,("Invalid SMB packet: first request: 0x%04X\n",
128 return NT_STATUS_INVALID_PARAMETER;
131 next_command_ofs = IVAL(inhdr, SMB2_HDR_NEXT_COMMAND);
132 if (next_command_ofs != 0) {
133 DEBUG(0,("Invalid SMB packet: next_command: 0x%08X\n",
135 return NT_STATUS_INVALID_PARAMETER;
138 mem_pool = talloc_pool(conn, 8192);
139 if (mem_pool == NULL) {
140 return NT_STATUS_NO_MEMORY;
143 req = talloc_zero(mem_pool, struct smbd_smb2_request);
145 talloc_free(mem_pool);
146 return NT_STATUS_NO_MEMORY;
148 req->mem_pool = mem_pool;
151 talloc_steal(req, inbuf);
153 req->in.vector = talloc_array(req, struct iovec, 4);
154 if (req->in.vector == NULL) {
155 talloc_free(mem_pool);
156 return NT_STATUS_NO_MEMORY;
158 req->in.vector_count = 4;
160 memcpy(req->in.nbt_hdr, inbuf, 4);
163 req->in.vector[0].iov_base = (void *)req->in.nbt_hdr;
164 req->in.vector[0].iov_len = 4;
165 ofs += req->in.vector[0].iov_len;
167 req->in.vector[1].iov_base = (void *)(inbuf + ofs);
168 req->in.vector[1].iov_len = SMB2_HDR_BODY;
169 ofs += req->in.vector[1].iov_len;
171 req->in.vector[2].iov_base = (void *)(inbuf + ofs);
172 req->in.vector[2].iov_len = SVAL(inbuf, ofs) & 0xFFFE;
173 ofs += req->in.vector[2].iov_len;
176 return NT_STATUS_INVALID_PARAMETER;
179 req->in.vector[3].iov_base = (void *)(inbuf + ofs);
180 req->in.vector[3].iov_len = size - ofs;
181 ofs += req->in.vector[3].iov_len;
183 req->current_idx = 1;
189 static NTSTATUS smbd_smb2_request_setup_out(struct smbd_smb2_request *req)
191 struct iovec *vector;
195 count = req->in.vector_count;
196 vector = talloc_array(req, struct iovec, count);
197 if (vector == NULL) {
198 return NT_STATUS_NO_MEMORY;
201 vector[0].iov_base = req->out.nbt_hdr;
202 vector[0].iov_len = 4;
203 SIVAL(req->out.nbt_hdr, 0, 0);
205 for (idx=1; idx < count; idx += 3) {
206 const uint8_t *inhdr = NULL;
207 uint8_t *outhdr = NULL;
208 uint8_t *outbody = NULL;
209 uint8_t *outdyn = NULL;
210 size_t outdyn_size = 1;
211 uint32_t next_command_ofs = 0;
212 struct iovec *current = &vector[idx];
214 if ((idx + 3) < count) {
215 /* we have a next command */
216 next_command_ofs = SMB2_HDR_BODY + 8 + 8;
220 inhdr = (const uint8_t *)req->in.vector[idx].iov_base;
222 outhdr = talloc_array(vector, uint8_t,
223 SMB2_HDR_BODY + 8 + outdyn_size);
224 if (outhdr == NULL) {
225 return NT_STATUS_NO_MEMORY;
228 outbody = outhdr + SMB2_HDR_BODY;
229 outdyn = outbody + 8;
231 current[0].iov_base = (void *)outhdr;
232 current[0].iov_len = SMB2_HDR_BODY;
234 current[1].iov_base = (void *)outbody;
235 current[1].iov_len = 8;
237 current[2].iov_base = (void *)outdyn;
238 current[2].iov_len = outdyn_size;
240 /* setup the SMB2 header */
241 SIVAL(outhdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
242 SSVAL(outhdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
243 SSVAL(outhdr, SMB2_HDR_EPOCH, 0);
244 SIVAL(outhdr, SMB2_HDR_STATUS,
245 NT_STATUS_V(NT_STATUS_INTERNAL_ERROR));
246 SSVAL(outhdr, SMB2_HDR_OPCODE,
247 SVAL(inhdr, SMB2_HDR_OPCODE));
248 SSVAL(outhdr, SMB2_HDR_CREDIT, 0);
249 SIVAL(outhdr, SMB2_HDR_FLAGS, SMB2_HDR_FLAG_REDIRECT);
250 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
251 SBVAL(outhdr, SMB2_HDR_MESSAGE_ID,
252 BVAL(inhdr, SMB2_HDR_MESSAGE_ID));
253 SIVAL(outhdr, SMB2_HDR_PID,
254 IVAL(inhdr, SMB2_HDR_PID));
255 SIVAL(outhdr, SMB2_HDR_TID,
256 IVAL(inhdr, SMB2_HDR_TID));
257 SBVAL(outhdr, SMB2_HDR_SESSION_ID,
258 BVAL(inhdr, SMB2_HDR_SESSION_ID));
259 memset(outhdr + SMB2_HDR_SIGNATURE, 0, 16);
261 /* setup error body header */
262 SSVAL(outbody, 0x00, 9);
263 SSVAL(outbody, 0x02, 0);
264 SIVAL(outbody, 0x04, 0);
266 /* setup the dynamic part */
267 SCVAL(outdyn, 0x00, 0);
270 req->out.vector = vector;
271 req->out.vector_count = count;
273 /* setup the length of the NBT packet */
274 smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
279 static void smbd_server_connection_terminate(struct smbd_server_connection *conn,
282 DEBUG(10,("smbd_server_connection_terminate: reason[%s]\n", reason));
283 exit_server_cleanly(reason);
286 static NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req)
288 const uint8_t *inhdr;
289 int i = req->current_idx;
293 inhdr = (const uint8_t *)req->in.vector[i].iov_base;
295 /* TODO: verify more things */
297 opcode = IVAL(inhdr, SMB2_HDR_OPCODE);
298 DEBUG(10,("smbd_smb2_request_dispatch: opcode[%u]\n", opcode));
300 case SMB2_OP_NEGPROT:
301 return smbd_smb2_request_process_negprot(req);
303 case SMB2_OP_SESSSETUP:
304 return smbd_smb2_request_process_sesssetup(req);
307 status = smbd_smb2_request_check_session(req);
308 if (!NT_STATUS_IS_OK(status)) {
309 return smbd_smb2_request_error(req, status);
311 return smbd_smb2_request_process_logoff(req);
314 status = smbd_smb2_request_check_session(req);
315 if (!NT_STATUS_IS_OK(status)) {
316 return smbd_smb2_request_error(req, status);
318 return smbd_smb2_request_process_tcon(req);
321 status = smbd_smb2_request_check_session(req);
322 if (!NT_STATUS_IS_OK(status)) {
323 return smbd_smb2_request_error(req, status);
325 status = smbd_smb2_request_check_tcon(req);
326 if (!NT_STATUS_IS_OK(status)) {
327 return smbd_smb2_request_error(req, status);
329 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
332 status = smbd_smb2_request_check_session(req);
333 if (!NT_STATUS_IS_OK(status)) {
334 return smbd_smb2_request_error(req, status);
336 status = smbd_smb2_request_check_tcon(req);
337 if (!NT_STATUS_IS_OK(status)) {
338 return smbd_smb2_request_error(req, status);
340 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
343 status = smbd_smb2_request_check_session(req);
344 if (!NT_STATUS_IS_OK(status)) {
345 return smbd_smb2_request_error(req, status);
347 status = smbd_smb2_request_check_tcon(req);
348 if (!NT_STATUS_IS_OK(status)) {
349 return smbd_smb2_request_error(req, status);
351 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
354 status = smbd_smb2_request_check_session(req);
355 if (!NT_STATUS_IS_OK(status)) {
356 return smbd_smb2_request_error(req, status);
358 status = smbd_smb2_request_check_tcon(req);
359 if (!NT_STATUS_IS_OK(status)) {
360 return smbd_smb2_request_error(req, status);
362 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
365 status = smbd_smb2_request_check_session(req);
366 if (!NT_STATUS_IS_OK(status)) {
367 return smbd_smb2_request_error(req, status);
369 status = smbd_smb2_request_check_tcon(req);
370 if (!NT_STATUS_IS_OK(status)) {
371 return smbd_smb2_request_error(req, status);
373 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
376 status = smbd_smb2_request_check_session(req);
377 if (!NT_STATUS_IS_OK(status)) {
378 return smbd_smb2_request_error(req, status);
380 status = smbd_smb2_request_check_tcon(req);
381 if (!NT_STATUS_IS_OK(status)) {
382 return smbd_smb2_request_error(req, status);
384 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
387 status = smbd_smb2_request_check_session(req);
388 if (!NT_STATUS_IS_OK(status)) {
389 return smbd_smb2_request_error(req, status);
391 status = smbd_smb2_request_check_tcon(req);
392 if (!NT_STATUS_IS_OK(status)) {
393 return smbd_smb2_request_error(req, status);
395 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
398 status = smbd_smb2_request_check_session(req);
399 if (!NT_STATUS_IS_OK(status)) {
400 return smbd_smb2_request_error(req, status);
402 status = smbd_smb2_request_check_tcon(req);
403 if (!NT_STATUS_IS_OK(status)) {
404 return smbd_smb2_request_error(req, status);
406 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
409 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
411 case SMB2_OP_KEEPALIVE:
412 return smbd_smb2_request_process_keepalive(req);
415 status = smbd_smb2_request_check_session(req);
416 if (!NT_STATUS_IS_OK(status)) {
417 return smbd_smb2_request_error(req, status);
419 status = smbd_smb2_request_check_tcon(req);
420 if (!NT_STATUS_IS_OK(status)) {
421 return smbd_smb2_request_error(req, status);
423 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
426 status = smbd_smb2_request_check_session(req);
427 if (!NT_STATUS_IS_OK(status)) {
428 return smbd_smb2_request_error(req, status);
430 status = smbd_smb2_request_check_tcon(req);
431 if (!NT_STATUS_IS_OK(status)) {
432 return smbd_smb2_request_error(req, status);
434 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
436 case SMB2_OP_GETINFO:
437 status = smbd_smb2_request_check_session(req);
438 if (!NT_STATUS_IS_OK(status)) {
439 return smbd_smb2_request_error(req, status);
441 status = smbd_smb2_request_check_tcon(req);
442 if (!NT_STATUS_IS_OK(status)) {
443 return smbd_smb2_request_error(req, status);
445 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
447 case SMB2_OP_SETINFO:
448 status = smbd_smb2_request_check_session(req);
449 if (!NT_STATUS_IS_OK(status)) {
450 return smbd_smb2_request_error(req, status);
452 status = smbd_smb2_request_check_tcon(req);
453 if (!NT_STATUS_IS_OK(status)) {
454 return smbd_smb2_request_error(req, status);
456 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
459 status = smbd_smb2_request_check_session(req);
460 if (!NT_STATUS_IS_OK(status)) {
461 return smbd_smb2_request_error(req, status);
463 status = smbd_smb2_request_check_tcon(req);
464 if (!NT_STATUS_IS_OK(status)) {
465 return smbd_smb2_request_error(req, status);
467 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
470 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
473 static void smbd_smb2_request_dispatch_compound(struct tevent_req *subreq);
474 static void smbd_smb2_request_writev_done(struct tevent_req *subreq);
476 static NTSTATUS smbd_smb2_request_reply(struct smbd_smb2_request *req)
478 struct tevent_req *subreq;
480 /* TODO: sign the response here */
482 smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
484 req->current_idx += 3;
486 if (req->current_idx > req->in.vector_count) {
487 struct timeval zero = timeval_zero();
488 subreq = tevent_wakeup_send(req,
489 req->conn->smb2.event_ctx,
491 if (subreq == NULL) {
492 return NT_STATUS_NO_MEMORY;
494 tevent_req_set_callback(subreq,
495 smbd_smb2_request_dispatch_compound,
501 subreq = tstream_writev_queue_send(req,
502 req->conn->smb2.event_ctx,
503 req->conn->smb2.stream,
504 req->conn->smb2.send_queue,
506 req->out.vector_count);
507 if (subreq == NULL) {
508 return NT_STATUS_NO_MEMORY;
510 tevent_req_set_callback(subreq, smbd_smb2_request_writev_done, req);
515 static void smbd_smb2_request_dispatch_compound(struct tevent_req *subreq)
517 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
518 struct smbd_smb2_request);
519 struct smbd_server_connection *conn = req->conn;
522 tevent_wakeup_recv(subreq);
525 DEBUG(10,("smbd_smb2_request_dispatch_compound: idx[%d] of %d vectors\n",
526 req->current_idx, req->in.vector_count));
528 status = smbd_smb2_request_dispatch(req);
529 if (!NT_STATUS_IS_OK(status)) {
530 smbd_server_connection_terminate(conn, nt_errstr(status));
535 static void smbd_smb2_request_writev_done(struct tevent_req *subreq)
537 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
538 struct smbd_smb2_request);
539 struct smbd_server_connection *conn = req->conn;
542 TALLOC_CTX *mem_pool;
544 ret = tstream_writev_queue_recv(subreq, &sys_errno);
547 NTSTATUS status = map_nt_error_from_unix(sys_errno);
548 smbd_server_connection_terminate(conn, nt_errstr(status));
552 mem_pool = req->mem_pool;
554 talloc_free(mem_pool);
557 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
563 int i = req->current_idx;
565 DEBUG(10,("smbd_smb2_request_error_ex: idx[%d] status[%s]%s\n",
566 i, nt_errstr(status), info ? " +info" : ""));
568 outhdr = (uint8_t *)req->out.vector[i].iov_base;
570 SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
572 outbody = outhdr + SMB2_HDR_BODY;
574 req->out.vector[i+1].iov_base = (void *)outbody;
575 req->out.vector[i+1].iov_len = 8;
578 SIVAL(outbody, 0x04, info->length);
579 req->out.vector[i+2].iov_base = (void *)info->data;
580 req->out.vector[i+2].iov_len = info->length;
582 req->out.vector[i+2].iov_base = (void *)(outbody + 8);
583 req->out.vector[i+2].iov_len = 1;
586 /* the error packet is the last response in the chain */
587 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, 0);
588 req->out.vector_count = req->current_idx + 3;
590 return smbd_smb2_request_reply(req);
593 NTSTATUS smbd_smb2_request_error(struct smbd_smb2_request *req,
596 return smbd_smb2_request_error_ex(req, status, NULL);
599 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
601 DATA_BLOB body, DATA_BLOB *dyn)
605 int i = req->current_idx;
606 uint32_t next_command_ofs;
608 DEBUG(10,("smbd_smb2_request_done_ex: "
609 "idx[%d] status[%s] body[%u] dyn[%s:%u]\n",
610 i, nt_errstr(status), (unsigned int)body.length,
612 (unsigned int)(dyn ? dyn->length : 0)));
614 if (body.length < 2) {
615 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
618 if ((body.length % 2) != 0) {
619 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
622 outhdr = (uint8_t *)req->out.vector[i].iov_base;
623 /* the fallback dynamic buffer */
624 outdyn = outhdr + SMB2_HDR_BODY + 8;
626 next_command_ofs = IVAL(outhdr, SMB2_HDR_NEXT_COMMAND);
627 SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
629 req->out.vector[i+1].iov_base = (void *)body.data;
630 req->out.vector[i+1].iov_len = body.length;
633 if (dyn->length > 0) {
634 req->out.vector[i+2].iov_base = (void *)dyn->data;
635 req->out.vector[i+2].iov_len = dyn->length;
637 req->out.vector[i+2].iov_base = (void *)outdyn;
638 req->out.vector[i+2].iov_len = 1;
641 req->out.vector[i+2].iov_base = NULL;
642 req->out.vector[i+2].iov_len = 0;
645 /* see if we need to recalculate the offset to the next response */
646 if (next_command_ofs > 0) {
647 next_command_ofs = SMB2_HDR_BODY;
648 next_command_ofs += req->out.vector[i+1].iov_len;
649 next_command_ofs += req->out.vector[i+2].iov_len;
652 /* TODO: we need to add padding ... */
653 if ((next_command_ofs % 8) != 0) {
654 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
657 /* the error packet is the last response in the chain */
658 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
660 return smbd_smb2_request_reply(req);
663 NTSTATUS smbd_smb2_request_done(struct smbd_smb2_request *req,
664 DATA_BLOB body, DATA_BLOB *dyn)
666 return smbd_smb2_request_done_ex(req, NT_STATUS_OK, body, dyn);
669 struct smbd_smb2_request_read_state {
671 bool asked_for_header;
672 struct smbd_smb2_request *smb2_req;
675 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
678 struct iovec **_vector,
680 static void smbd_smb2_request_read_done(struct tevent_req *subreq);
682 static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx,
683 struct tevent_context *ev,
684 struct smbd_server_connection *conn)
686 struct tevent_req *req;
687 struct smbd_smb2_request_read_state *state;
688 struct tevent_req *subreq;
689 TALLOC_CTX *mem_pool;
691 req = tevent_req_create(mem_ctx, &state,
692 struct smbd_smb2_request_read_state);
697 state->asked_for_header = false;
699 mem_pool = talloc_pool(state, 8192);
700 if (tevent_req_nomem(mem_pool, req)) {
701 return tevent_req_post(req, ev);
704 state->smb2_req = talloc_zero(mem_pool, struct smbd_smb2_request);
705 if (tevent_req_nomem(state->smb2_req, req)) {
706 return tevent_req_post(req, ev);
709 state->smb2_req->mem_pool = mem_pool;
710 state->smb2_req->conn = conn;
712 subreq = tstream_readv_pdu_queue_send(state, ev, conn->smb2.stream,
713 conn->smb2.recv_queue,
714 smbd_smb2_request_next_vector,
716 if (tevent_req_nomem(subreq, req)) {
717 return tevent_req_post(req, ev);
719 tevent_req_set_callback(subreq, smbd_smb2_request_read_done, req);
724 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
727 struct iovec **_vector,
730 struct smbd_smb2_request_read_state *state =
731 talloc_get_type_abort(private_data,
732 struct smbd_smb2_request_read_state);
733 struct smbd_smb2_request *req = state->smb2_req;
734 struct iovec *vector;
735 int idx = req->in.vector_count;
739 if (req->in.vector_count == 0) {
741 * first we need to get the NBT header
743 req->in.vector = talloc_array(req, struct iovec,
744 req->in.vector_count + 1);
745 if (req->in.vector == NULL) {
748 req->in.vector_count += 1;
750 req->in.vector[idx].iov_base = (void *)req->in.nbt_hdr;
751 req->in.vector[idx].iov_len = 4;
753 vector = talloc_array(mem_ctx, struct iovec, 1);
754 if (vector == NULL) {
758 vector[0] = req->in.vector[idx];
765 if (req->in.vector_count == 1) {
767 * Now we analyze the NBT header
769 state->missing = smb2_len(req->in.vector[0].iov_base);
771 if (state->missing == 0) {
772 /* if there're no remaining bytes, we're done */
778 req->in.vector = talloc_realloc(req, req->in.vector,
780 req->in.vector_count + 1);
781 if (req->in.vector == NULL) {
784 req->in.vector_count += 1;
786 if (CVAL(req->in.vector[0].iov_base, 0) != 0) {
788 * it's a special NBT message,
789 * so get all remaining bytes
791 len = state->missing;
792 } else if (state->missing < (SMB2_HDR_BODY + 2)) {
794 * it's an invalid message, just read what we can get
795 * and let the caller handle the error
797 len = state->missing;
800 * We assume it's a SMB2 request,
801 * and we first get the header and the
802 * first 2 bytes (the struct size) of the body
804 len = SMB2_HDR_BODY + 2;
806 state->asked_for_header = true;
809 state->missing -= len;
811 buf = talloc_array(req->in.vector, uint8_t, len);
816 req->in.vector[idx].iov_base = (void *)buf;
817 req->in.vector[idx].iov_len = len;
819 vector = talloc_array(mem_ctx, struct iovec, 1);
820 if (vector == NULL) {
824 vector[0] = req->in.vector[idx];
831 if (state->missing == 0) {
832 /* if there're no remaining bytes, we're done */
838 if (state->asked_for_header) {
841 size_t next_command_ofs;
846 bool invalid = false;
848 state->asked_for_header = false;
851 * We got the SMB2 header and the first 2 bytes
852 * of the body. We fix the size to just the header
853 * and manually copy the 2 first bytes to the body section
855 req->in.vector[idx-1].iov_len = SMB2_HDR_BODY;
856 hdr = (const uint8_t *)req->in.vector[idx-1].iov_base;
858 /* allocate vectors for body and dynamic areas */
859 req->in.vector = talloc_realloc(req, req->in.vector,
861 req->in.vector_count + 2);
862 if (req->in.vector == NULL) {
865 req->in.vector_count += 2;
867 full_size = state->missing + SMB2_HDR_BODY + 2;
868 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
869 body_size = SVAL(hdr, SMB2_HDR_BODY);
871 if (next_command_ofs != 0) {
872 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
874 * this is invalid, just return a zero
875 * body and let the caller deal with the error
878 } else if (next_command_ofs > full_size) {
880 * this is invalid, just return a zero
881 * body and let the caller deal with the error
885 full_size = next_command_ofs;
892 * this is invalid, just return a zero
893 * body and let the caller deal with the error
896 } else if (body_size > (full_size - SMB2_HDR_BODY)) {
898 * this is invalid, just return a zero
899 * body and let the caller deal with the error
906 /* the caller should check this */
910 if ((body_size % 2) != 0) {
914 dyn_size = full_size - (SMB2_HDR_BODY + body_size);
916 state->missing -= (body_size - 2) + dyn_size;
918 body = talloc_array(req->in.vector, uint8_t, body_size);
923 dyn = talloc_array(req->in.vector, uint8_t, dyn_size);
928 req->in.vector[idx].iov_base = (void *)body;
929 req->in.vector[idx].iov_len = body_size;
930 req->in.vector[idx+1].iov_base = (void *)dyn;
931 req->in.vector[idx+1].iov_len = dyn_size;
933 vector = talloc_array(mem_ctx, struct iovec, 2);
934 if (vector == NULL) {
939 * the first 2 bytes of the body were already fetched
940 * together with the header
942 memcpy(body, hdr + SMB2_HDR_BODY, 2);
943 vector[0].iov_base = body + 2;
944 vector[0].iov_len = req->in.vector[idx].iov_len - 2;
946 vector[1] = req->in.vector[idx+1];
954 * when we endup here, we're looking for a new SMB2 request
955 * next. And we ask for its header and the first 2 bytes of
956 * the body (like we did for the first SMB2 request).
959 req->in.vector = talloc_realloc(req, req->in.vector,
961 req->in.vector_count + 1);
962 if (req->in.vector == NULL) {
965 req->in.vector_count += 1;
968 * We assume it's a SMB2 request,
969 * and we first get the header and the
970 * first 2 bytes (the struct size) of the body
972 len = SMB2_HDR_BODY + 2;
974 if (len > state->missing) {
975 /* let the caller handle the error */
976 len = state->missing;
979 state->missing -= len;
980 state->asked_for_header = true;
982 buf = talloc_array(req->in.vector, uint8_t, len);
987 req->in.vector[idx].iov_base = (void *)buf;
988 req->in.vector[idx].iov_len = len;
990 vector = talloc_array(mem_ctx, struct iovec, 1);
991 if (vector == NULL) {
995 vector[0] = req->in.vector[idx];
1002 static void smbd_smb2_request_read_done(struct tevent_req *subreq)
1004 struct tevent_req *req =
1005 tevent_req_callback_data(subreq,
1011 ret = tstream_readv_pdu_queue_recv(subreq, &sys_errno);
1013 status = map_nt_error_from_unix(sys_errno);
1014 tevent_req_nterror(req, status);
1018 tevent_req_done(req);
1021 static NTSTATUS smbd_smb2_request_read_recv(struct tevent_req *req,
1022 TALLOC_CTX *mem_ctx,
1023 struct smbd_smb2_request **_smb2_req)
1025 struct smbd_smb2_request_read_state *state =
1026 tevent_req_data(req,
1027 struct smbd_smb2_request_read_state);
1030 if (tevent_req_is_nterror(req, &status)) {
1031 tevent_req_received(req);
1035 talloc_steal(mem_ctx, state->smb2_req->mem_pool);
1036 *_smb2_req = state->smb2_req;
1037 tevent_req_received(req);
1038 return NT_STATUS_OK;
1041 static void smbd_smb2_request_incoming(struct tevent_req *subreq);
1043 void smbd_smb2_first_negprot(struct smbd_server_connection *conn,
1044 const uint8_t *inbuf, size_t size)
1047 struct smbd_smb2_request *req;
1048 struct tevent_req *subreq;
1050 DEBUG(10,("smbd_smb2_first_negprot: packet length %u\n",
1051 (unsigned int)size));
1053 status = smbd_initialize_smb2(conn);
1054 if (!NT_STATUS_IS_OK(status)) {
1055 smbd_server_connection_terminate(conn, nt_errstr(status));
1059 status = smbd_smb2_request_create(conn, inbuf, size, &req);
1060 if (!NT_STATUS_IS_OK(status)) {
1061 smbd_server_connection_terminate(conn, nt_errstr(status));
1065 status = smbd_smb2_request_setup_out(req);
1066 if (!NT_STATUS_IS_OK(status)) {
1067 smbd_server_connection_terminate(conn, nt_errstr(status));
1071 status = smbd_smb2_request_dispatch(req);
1072 if (!NT_STATUS_IS_OK(status)) {
1073 smbd_server_connection_terminate(conn, nt_errstr(status));
1077 /* ask for the next request */
1078 subreq = smbd_smb2_request_read_send(conn,conn->smb2.event_ctx, conn);
1079 if (subreq == NULL) {
1080 smbd_server_connection_terminate(conn, "no memory for reading");
1083 tevent_req_set_callback(subreq, smbd_smb2_request_incoming, conn);
1086 static void smbd_smb2_request_incoming(struct tevent_req *subreq)
1088 struct smbd_server_connection *conn = tevent_req_callback_data(subreq,
1089 struct smbd_server_connection);
1091 struct smbd_smb2_request *req;
1093 status = smbd_smb2_request_read_recv(subreq, conn, &req);
1094 TALLOC_FREE(subreq);
1095 if (!NT_STATUS_IS_OK(status)) {
1096 smbd_server_connection_terminate(conn, nt_errstr(status));
1100 /* TODO: validate the incoming request */
1101 req->current_idx = 1;
1103 DEBUG(10,("smbd_smb2_request_incoming: idx[%d] of %d vectors\n",
1104 req->current_idx, req->in.vector_count));
1106 status = smbd_smb2_request_setup_out(req);
1107 if (!NT_STATUS_IS_OK(status)) {
1108 smbd_server_connection_terminate(conn, nt_errstr(status));
1112 status = smbd_smb2_request_dispatch(req);
1113 if (!NT_STATUS_IS_OK(status)) {
1114 smbd_server_connection_terminate(conn, nt_errstr(status));
1118 /* ask for the next request (this constructs the main loop) */
1119 subreq = smbd_smb2_request_read_send(conn,conn->smb2.event_ctx, conn);
1120 if (subreq == NULL) {
1121 smbd_server_connection_terminate(conn, "no memory for reading");
1124 tevent_req_set_callback(subreq, smbd_smb2_request_incoming, conn);