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->smb1.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 = 0x0000FFFE;
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 /* Make up a number for now... JRA. FIXME ! FIXME !*/
249 SSVAL(outhdr, SMB2_HDR_CREDIT, 20);
250 SIVAL(outhdr, SMB2_HDR_FLAGS, SMB2_HDR_FLAG_REDIRECT);
251 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
252 SBVAL(outhdr, SMB2_HDR_MESSAGE_ID,
253 BVAL(inhdr, SMB2_HDR_MESSAGE_ID));
254 SIVAL(outhdr, SMB2_HDR_PID,
255 IVAL(inhdr, SMB2_HDR_PID));
256 SIVAL(outhdr, SMB2_HDR_TID,
257 IVAL(inhdr, SMB2_HDR_TID));
258 SBVAL(outhdr, SMB2_HDR_SESSION_ID,
259 BVAL(inhdr, SMB2_HDR_SESSION_ID));
260 memset(outhdr + SMB2_HDR_SIGNATURE, 0, 16);
262 /* setup error body header */
263 SSVAL(outbody, 0x00, 9);
264 SSVAL(outbody, 0x02, 0);
265 SIVAL(outbody, 0x04, 0);
267 /* setup the dynamic part */
268 SCVAL(outdyn, 0x00, 0);
271 req->out.vector = vector;
272 req->out.vector_count = count;
274 /* setup the length of the NBT packet */
275 smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
280 static void smbd_server_connection_terminate(struct smbd_server_connection *conn,
283 DEBUG(10,("smbd_server_connection_terminate: reason[%s]\n", reason));
284 exit_server_cleanly(reason);
287 static NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req)
289 const uint8_t *inhdr;
290 int i = req->current_idx;
294 NTSTATUS session_status;
296 inhdr = (const uint8_t *)req->in.vector[i].iov_base;
298 /* TODO: verify more things */
300 flags = IVAL(inhdr, SMB2_HDR_FLAGS);
301 opcode = IVAL(inhdr, SMB2_HDR_OPCODE);
302 DEBUG(10,("smbd_smb2_request_dispatch: opcode[%u]\n", opcode));
304 #define TMP_SMB2_ALLOWED_FLAGS ( \
305 SMB2_HDR_FLAG_CHAINED | \
306 SMB2_HDR_FLAG_SIGNED | \
308 if ((flags & ~TMP_SMB2_ALLOWED_FLAGS) != 0) {
309 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
311 #undef TMP_SMB2_ALLOWED_FLAGS
313 session_status = smbd_smb2_request_check_session(req);
315 req->do_signing = false;
316 if (flags & SMB2_HDR_FLAG_SIGNED) {
317 if (!NT_STATUS_IS_OK(session_status)) {
318 return smbd_smb2_request_error(req, session_status);
321 req->do_signing = true;
322 status = smb2_signing_check_pdu(req->session->session_key,
323 &req->in.vector[i], 3);
324 if (!NT_STATUS_IS_OK(status)) {
325 return smbd_smb2_request_error(req, status);
327 } else if (req->session && req->session->do_signing) {
328 return smbd_smb2_request_error(req, NT_STATUS_ACCESS_DENIED);
332 case SMB2_OP_NEGPROT:
333 return smbd_smb2_request_process_negprot(req);
335 case SMB2_OP_SESSSETUP:
336 return smbd_smb2_request_process_sesssetup(req);
339 if (!NT_STATUS_IS_OK(session_status)) {
340 return smbd_smb2_request_error(req, session_status);
342 return smbd_smb2_request_process_logoff(req);
345 if (!NT_STATUS_IS_OK(session_status)) {
346 return smbd_smb2_request_error(req, session_status);
348 status = smbd_smb2_request_check_session(req);
349 if (!NT_STATUS_IS_OK(status)) {
350 return smbd_smb2_request_error(req, status);
352 return smbd_smb2_request_process_tcon(req);
355 if (!NT_STATUS_IS_OK(session_status)) {
356 return smbd_smb2_request_error(req, session_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_process_tdis(req);
365 if (!NT_STATUS_IS_OK(session_status)) {
366 return smbd_smb2_request_error(req, session_status);
368 status = smbd_smb2_request_check_tcon(req);
369 if (!NT_STATUS_IS_OK(status)) {
370 return smbd_smb2_request_error(req, status);
372 return smbd_smb2_request_process_create(req);
375 if (!NT_STATUS_IS_OK(session_status)) {
376 return smbd_smb2_request_error(req, session_status);
378 status = smbd_smb2_request_check_tcon(req);
379 if (!NT_STATUS_IS_OK(status)) {
380 return smbd_smb2_request_error(req, status);
382 return smbd_smb2_request_process_close(req);
385 if (!NT_STATUS_IS_OK(session_status)) {
386 return smbd_smb2_request_error(req, session_status);
388 status = smbd_smb2_request_check_tcon(req);
389 if (!NT_STATUS_IS_OK(status)) {
390 return smbd_smb2_request_error(req, status);
392 return smbd_smb2_request_process_flush(req);
395 if (!NT_STATUS_IS_OK(session_status)) {
396 return smbd_smb2_request_error(req, session_status);
398 status = smbd_smb2_request_check_tcon(req);
399 if (!NT_STATUS_IS_OK(status)) {
400 return smbd_smb2_request_error(req, status);
402 return smbd_smb2_request_process_read(req);
405 if (!NT_STATUS_IS_OK(session_status)) {
406 return smbd_smb2_request_error(req, session_status);
408 status = smbd_smb2_request_check_tcon(req);
409 if (!NT_STATUS_IS_OK(status)) {
410 return smbd_smb2_request_error(req, status);
412 return smbd_smb2_request_process_write(req);
415 if (!NT_STATUS_IS_OK(session_status)) {
416 return smbd_smb2_request_error(req, session_status);
418 status = smbd_smb2_request_check_tcon(req);
419 if (!NT_STATUS_IS_OK(status)) {
420 return smbd_smb2_request_error(req, status);
422 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
425 if (!NT_STATUS_IS_OK(session_status)) {
426 return smbd_smb2_request_error(req, session_status);
428 status = smbd_smb2_request_check_tcon(req);
429 if (!NT_STATUS_IS_OK(status)) {
430 return smbd_smb2_request_error(req, status);
432 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
435 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
437 case SMB2_OP_KEEPALIVE:
438 return smbd_smb2_request_process_keepalive(req);
441 if (!NT_STATUS_IS_OK(session_status)) {
442 return smbd_smb2_request_error(req, session_status);
444 status = smbd_smb2_request_check_tcon(req);
445 if (!NT_STATUS_IS_OK(status)) {
446 return smbd_smb2_request_error(req, status);
448 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
451 if (!NT_STATUS_IS_OK(session_status)) {
452 return smbd_smb2_request_error(req, session_status);
454 status = smbd_smb2_request_check_tcon(req);
455 if (!NT_STATUS_IS_OK(status)) {
456 return smbd_smb2_request_error(req, status);
458 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
460 case SMB2_OP_GETINFO:
461 if (!NT_STATUS_IS_OK(session_status)) {
462 return smbd_smb2_request_error(req, session_status);
464 status = smbd_smb2_request_check_tcon(req);
465 if (!NT_STATUS_IS_OK(status)) {
466 return smbd_smb2_request_error(req, status);
468 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
470 case SMB2_OP_SETINFO:
471 if (!NT_STATUS_IS_OK(session_status)) {
472 return smbd_smb2_request_error(req, session_status);
474 status = smbd_smb2_request_check_tcon(req);
475 if (!NT_STATUS_IS_OK(status)) {
476 return smbd_smb2_request_error(req, status);
478 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
481 if (!NT_STATUS_IS_OK(session_status)) {
482 return smbd_smb2_request_error(req, session_status);
484 status = smbd_smb2_request_check_tcon(req);
485 if (!NT_STATUS_IS_OK(status)) {
486 return smbd_smb2_request_error(req, status);
488 return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
491 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
494 static void smbd_smb2_request_dispatch_compound(struct tevent_req *subreq);
495 static void smbd_smb2_request_writev_done(struct tevent_req *subreq);
497 static NTSTATUS smbd_smb2_request_reply(struct smbd_smb2_request *req)
499 struct tevent_req *subreq;
501 smb2_setup_nbt_length(req->out.vector, req->out.vector_count);
503 if (req->do_signing) {
504 int i = req->current_idx;
506 status = smb2_signing_sign_pdu(req->session->session_key,
507 &req->out.vector[i], 3);
508 if (!NT_STATUS_IS_OK(status)) {
513 req->current_idx += 3;
515 if (req->current_idx > req->in.vector_count) {
516 struct timeval zero = timeval_zero();
517 subreq = tevent_wakeup_send(req,
518 req->conn->smb2.event_ctx,
520 if (subreq == NULL) {
521 return NT_STATUS_NO_MEMORY;
523 tevent_req_set_callback(subreq,
524 smbd_smb2_request_dispatch_compound,
530 subreq = tstream_writev_queue_send(req,
531 req->conn->smb2.event_ctx,
532 req->conn->smb2.stream,
533 req->conn->smb2.send_queue,
535 req->out.vector_count);
536 if (subreq == NULL) {
537 return NT_STATUS_NO_MEMORY;
539 tevent_req_set_callback(subreq, smbd_smb2_request_writev_done, req);
544 static void smbd_smb2_request_dispatch_compound(struct tevent_req *subreq)
546 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
547 struct smbd_smb2_request);
548 struct smbd_server_connection *conn = req->conn;
551 tevent_wakeup_recv(subreq);
554 DEBUG(10,("smbd_smb2_request_dispatch_compound: idx[%d] of %d vectors\n",
555 req->current_idx, req->in.vector_count));
557 status = smbd_smb2_request_dispatch(req);
558 if (!NT_STATUS_IS_OK(status)) {
559 smbd_server_connection_terminate(conn, nt_errstr(status));
564 static void smbd_smb2_request_writev_done(struct tevent_req *subreq)
566 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
567 struct smbd_smb2_request);
568 struct smbd_server_connection *conn = req->conn;
571 TALLOC_CTX *mem_pool;
573 ret = tstream_writev_queue_recv(subreq, &sys_errno);
576 NTSTATUS status = map_nt_error_from_unix(sys_errno);
577 smbd_server_connection_terminate(conn, nt_errstr(status));
581 mem_pool = req->mem_pool;
583 talloc_free(mem_pool);
586 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
589 const char *location)
593 int i = req->current_idx;
595 DEBUG(10,("smbd_smb2_request_error_ex: idx[%d] status[%s] |%s| at %s\n",
596 i, nt_errstr(status), info ? " +info" : "",
599 outhdr = (uint8_t *)req->out.vector[i].iov_base;
601 SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
603 outbody = outhdr + SMB2_HDR_BODY;
605 req->out.vector[i+1].iov_base = (void *)outbody;
606 req->out.vector[i+1].iov_len = 8;
609 SIVAL(outbody, 0x04, info->length);
610 req->out.vector[i+2].iov_base = (void *)info->data;
611 req->out.vector[i+2].iov_len = info->length;
613 req->out.vector[i+2].iov_base = (void *)(outbody + 8);
614 req->out.vector[i+2].iov_len = 1;
617 /* the error packet is the last response in the chain */
618 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, 0);
619 req->out.vector_count = req->current_idx + 3;
621 return smbd_smb2_request_reply(req);
624 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
626 DATA_BLOB body, DATA_BLOB *dyn,
627 const char *location)
631 int i = req->current_idx;
632 uint32_t next_command_ofs;
634 DEBUG(10,("smbd_smb2_request_done_ex: "
635 "idx[%d] status[%s] body[%u] dyn[%s:%u] at %s\n",
636 i, nt_errstr(status), (unsigned int)body.length,
638 (unsigned int)(dyn ? dyn->length : 0),
641 if (body.length < 2) {
642 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
645 if ((body.length % 2) != 0) {
646 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
649 outhdr = (uint8_t *)req->out.vector[i].iov_base;
650 /* the fallback dynamic buffer */
651 outdyn = outhdr + SMB2_HDR_BODY + 8;
653 next_command_ofs = IVAL(outhdr, SMB2_HDR_NEXT_COMMAND);
654 SIVAL(outhdr, SMB2_HDR_STATUS, NT_STATUS_V(status));
656 req->out.vector[i+1].iov_base = (void *)body.data;
657 req->out.vector[i+1].iov_len = body.length;
660 if (dyn->length > 0) {
661 req->out.vector[i+2].iov_base = (void *)dyn->data;
662 req->out.vector[i+2].iov_len = dyn->length;
664 req->out.vector[i+2].iov_base = (void *)outdyn;
665 req->out.vector[i+2].iov_len = 1;
668 req->out.vector[i+2].iov_base = NULL;
669 req->out.vector[i+2].iov_len = 0;
672 /* see if we need to recalculate the offset to the next response */
673 if (next_command_ofs > 0) {
674 next_command_ofs = SMB2_HDR_BODY;
675 next_command_ofs += req->out.vector[i+1].iov_len;
676 next_command_ofs += req->out.vector[i+2].iov_len;
679 /* TODO: we need to add padding ... */
680 if ((next_command_ofs % 8) != 0) {
681 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
684 /* the error packet is the last response in the chain */
685 SIVAL(outhdr, SMB2_HDR_NEXT_COMMAND, next_command_ofs);
687 return smbd_smb2_request_reply(req);
690 struct smbd_smb2_request_read_state {
692 bool asked_for_header;
693 struct smbd_smb2_request *smb2_req;
696 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
699 struct iovec **_vector,
701 static void smbd_smb2_request_read_done(struct tevent_req *subreq);
703 static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx,
704 struct tevent_context *ev,
705 struct smbd_server_connection *conn)
707 struct tevent_req *req;
708 struct smbd_smb2_request_read_state *state;
709 struct tevent_req *subreq;
710 TALLOC_CTX *mem_pool;
712 req = tevent_req_create(mem_ctx, &state,
713 struct smbd_smb2_request_read_state);
718 state->asked_for_header = false;
720 mem_pool = talloc_pool(state, 8192);
721 if (tevent_req_nomem(mem_pool, req)) {
722 return tevent_req_post(req, ev);
725 state->smb2_req = talloc_zero(mem_pool, struct smbd_smb2_request);
726 if (tevent_req_nomem(state->smb2_req, req)) {
727 return tevent_req_post(req, ev);
730 state->smb2_req->mem_pool = mem_pool;
731 state->smb2_req->conn = conn;
733 subreq = tstream_readv_pdu_queue_send(state, ev, conn->smb2.stream,
734 conn->smb2.recv_queue,
735 smbd_smb2_request_next_vector,
737 if (tevent_req_nomem(subreq, req)) {
738 return tevent_req_post(req, ev);
740 tevent_req_set_callback(subreq, smbd_smb2_request_read_done, req);
745 static int smbd_smb2_request_next_vector(struct tstream_context *stream,
748 struct iovec **_vector,
751 struct smbd_smb2_request_read_state *state =
752 talloc_get_type_abort(private_data,
753 struct smbd_smb2_request_read_state);
754 struct smbd_smb2_request *req = state->smb2_req;
755 struct iovec *vector;
756 int idx = req->in.vector_count;
760 if (req->in.vector_count == 0) {
762 * first we need to get the NBT header
764 req->in.vector = talloc_array(req, struct iovec,
765 req->in.vector_count + 1);
766 if (req->in.vector == NULL) {
769 req->in.vector_count += 1;
771 req->in.vector[idx].iov_base = (void *)req->in.nbt_hdr;
772 req->in.vector[idx].iov_len = 4;
774 vector = talloc_array(mem_ctx, struct iovec, 1);
775 if (vector == NULL) {
779 vector[0] = req->in.vector[idx];
786 if (req->in.vector_count == 1) {
788 * Now we analyze the NBT header
790 state->missing = smb2_len(req->in.vector[0].iov_base);
792 if (state->missing == 0) {
793 /* if there're no remaining bytes, we're done */
799 req->in.vector = talloc_realloc(req, req->in.vector,
801 req->in.vector_count + 1);
802 if (req->in.vector == NULL) {
805 req->in.vector_count += 1;
807 if (CVAL(req->in.vector[0].iov_base, 0) != 0) {
809 * it's a special NBT message,
810 * so get all remaining bytes
812 len = state->missing;
813 } else if (state->missing < (SMB2_HDR_BODY + 2)) {
815 * it's an invalid message, just read what we can get
816 * and let the caller handle the error
818 len = state->missing;
821 * We assume it's a SMB2 request,
822 * and we first get the header and the
823 * first 2 bytes (the struct size) of the body
825 len = SMB2_HDR_BODY + 2;
827 state->asked_for_header = true;
830 state->missing -= len;
832 buf = talloc_array(req->in.vector, uint8_t, len);
837 req->in.vector[idx].iov_base = (void *)buf;
838 req->in.vector[idx].iov_len = len;
840 vector = talloc_array(mem_ctx, struct iovec, 1);
841 if (vector == NULL) {
845 vector[0] = req->in.vector[idx];
852 if (state->missing == 0) {
853 /* if there're no remaining bytes, we're done */
859 if (state->asked_for_header) {
862 size_t next_command_ofs;
867 bool invalid = false;
869 state->asked_for_header = false;
872 * We got the SMB2 header and the first 2 bytes
873 * of the body. We fix the size to just the header
874 * and manually copy the 2 first bytes to the body section
876 req->in.vector[idx-1].iov_len = SMB2_HDR_BODY;
877 hdr = (const uint8_t *)req->in.vector[idx-1].iov_base;
879 /* allocate vectors for body and dynamic areas */
880 req->in.vector = talloc_realloc(req, req->in.vector,
882 req->in.vector_count + 2);
883 if (req->in.vector == NULL) {
886 req->in.vector_count += 2;
888 full_size = state->missing + SMB2_HDR_BODY + 2;
889 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
890 body_size = SVAL(hdr, SMB2_HDR_BODY);
892 if (next_command_ofs != 0) {
893 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
895 * this is invalid, just return a zero
896 * body and let the caller deal with the error
899 } else if (next_command_ofs > full_size) {
901 * this is invalid, just return a zero
902 * body and let the caller deal with the error
906 full_size = next_command_ofs;
913 * this is invalid, just return a zero
914 * body and let the caller deal with the error
917 } else if (body_size > (full_size - SMB2_HDR_BODY)) {
919 * this is invalid, just return a zero
920 * body and let the caller deal with the error
927 /* the caller should check this */
931 if ((body_size % 2) != 0) {
935 dyn_size = full_size - (SMB2_HDR_BODY + body_size);
937 state->missing -= (body_size - 2) + dyn_size;
939 body = talloc_array(req->in.vector, uint8_t, body_size);
944 dyn = talloc_array(req->in.vector, uint8_t, dyn_size);
949 req->in.vector[idx].iov_base = (void *)body;
950 req->in.vector[idx].iov_len = body_size;
951 req->in.vector[idx+1].iov_base = (void *)dyn;
952 req->in.vector[idx+1].iov_len = dyn_size;
954 vector = talloc_array(mem_ctx, struct iovec, 2);
955 if (vector == NULL) {
960 * the first 2 bytes of the body were already fetched
961 * together with the header
963 memcpy(body, hdr + SMB2_HDR_BODY, 2);
964 vector[0].iov_base = body + 2;
965 vector[0].iov_len = req->in.vector[idx].iov_len - 2;
967 vector[1] = req->in.vector[idx+1];
975 * when we endup here, we're looking for a new SMB2 request
976 * next. And we ask for its header and the first 2 bytes of
977 * the body (like we did for the first SMB2 request).
980 req->in.vector = talloc_realloc(req, req->in.vector,
982 req->in.vector_count + 1);
983 if (req->in.vector == NULL) {
986 req->in.vector_count += 1;
989 * We assume it's a SMB2 request,
990 * and we first get the header and the
991 * first 2 bytes (the struct size) of the body
993 len = SMB2_HDR_BODY + 2;
995 if (len > state->missing) {
996 /* let the caller handle the error */
997 len = state->missing;
1000 state->missing -= len;
1001 state->asked_for_header = true;
1003 buf = talloc_array(req->in.vector, uint8_t, len);
1008 req->in.vector[idx].iov_base = (void *)buf;
1009 req->in.vector[idx].iov_len = len;
1011 vector = talloc_array(mem_ctx, struct iovec, 1);
1012 if (vector == NULL) {
1016 vector[0] = req->in.vector[idx];
1023 static void smbd_smb2_request_read_done(struct tevent_req *subreq)
1025 struct tevent_req *req =
1026 tevent_req_callback_data(subreq,
1032 ret = tstream_readv_pdu_queue_recv(subreq, &sys_errno);
1034 status = map_nt_error_from_unix(sys_errno);
1035 tevent_req_nterror(req, status);
1039 tevent_req_done(req);
1042 static NTSTATUS smbd_smb2_request_read_recv(struct tevent_req *req,
1043 TALLOC_CTX *mem_ctx,
1044 struct smbd_smb2_request **_smb2_req)
1046 struct smbd_smb2_request_read_state *state =
1047 tevent_req_data(req,
1048 struct smbd_smb2_request_read_state);
1051 if (tevent_req_is_nterror(req, &status)) {
1052 tevent_req_received(req);
1056 talloc_steal(mem_ctx, state->smb2_req->mem_pool);
1057 *_smb2_req = state->smb2_req;
1058 tevent_req_received(req);
1059 return NT_STATUS_OK;
1062 static void smbd_smb2_request_incoming(struct tevent_req *subreq);
1064 void smbd_smb2_first_negprot(struct smbd_server_connection *conn,
1065 const uint8_t *inbuf, size_t size)
1068 struct smbd_smb2_request *req;
1069 struct tevent_req *subreq;
1071 DEBUG(10,("smbd_smb2_first_negprot: packet length %u\n",
1072 (unsigned int)size));
1074 status = smbd_initialize_smb2(conn);
1075 if (!NT_STATUS_IS_OK(status)) {
1076 smbd_server_connection_terminate(conn, nt_errstr(status));
1080 status = smbd_smb2_request_create(conn, inbuf, size, &req);
1081 if (!NT_STATUS_IS_OK(status)) {
1082 smbd_server_connection_terminate(conn, nt_errstr(status));
1086 status = smbd_smb2_request_setup_out(req);
1087 if (!NT_STATUS_IS_OK(status)) {
1088 smbd_server_connection_terminate(conn, nt_errstr(status));
1092 status = smbd_smb2_request_dispatch(req);
1093 if (!NT_STATUS_IS_OK(status)) {
1094 smbd_server_connection_terminate(conn, nt_errstr(status));
1098 /* ask for the next request */
1099 subreq = smbd_smb2_request_read_send(conn,conn->smb2.event_ctx, conn);
1100 if (subreq == NULL) {
1101 smbd_server_connection_terminate(conn, "no memory for reading");
1104 tevent_req_set_callback(subreq, smbd_smb2_request_incoming, conn);
1107 static void smbd_smb2_request_incoming(struct tevent_req *subreq)
1109 struct smbd_server_connection *conn = tevent_req_callback_data(subreq,
1110 struct smbd_server_connection);
1112 struct smbd_smb2_request *req;
1114 status = smbd_smb2_request_read_recv(subreq, conn, &req);
1115 TALLOC_FREE(subreq);
1116 if (!NT_STATUS_IS_OK(status)) {
1117 smbd_server_connection_terminate(conn, nt_errstr(status));
1121 /* TODO: validate the incoming request */
1122 req->current_idx = 1;
1124 DEBUG(10,("smbd_smb2_request_incoming: idx[%d] of %d vectors\n",
1125 req->current_idx, req->in.vector_count));
1127 status = smbd_smb2_request_setup_out(req);
1128 if (!NT_STATUS_IS_OK(status)) {
1129 smbd_server_connection_terminate(conn, nt_errstr(status));
1133 status = smbd_smb2_request_dispatch(req);
1134 if (!NT_STATUS_IS_OK(status)) {
1135 smbd_server_connection_terminate(conn, nt_errstr(status));
1139 /* ask for the next request (this constructs the main loop) */
1140 subreq = smbd_smb2_request_read_send(conn,conn->smb2.event_ctx, conn);
1141 if (subreq == NULL) {
1142 smbd_server_connection_terminate(conn, "no memory for reading");
1145 tevent_req_set_callback(subreq, smbd_smb2_request_incoming, conn);