2 Unix SMB/CIFS implementation.
3 process incoming packets - main loop
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Volker Lendecke 2005-2007
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 "../lib/tsocket/tsocket.h"
23 #include "system/filesys.h"
24 #include "smbd/smbd.h"
25 #include "smbd/globals.h"
26 #include "librpc/gen_ndr/netlogon.h"
27 #include "../lib/async_req/async_sock.h"
28 #include "ctdbd_conn.h"
29 #include "../lib/util/select.h"
30 #include "printing/queue_process.h"
31 #include "system/select.h"
35 #include "smbprofile.h"
36 #include "rpc_server/spoolss/srv_spoolss_nt.h"
37 #include "libsmb/libsmb.h"
38 #include "../lib/util/tevent_ntstatus.h"
39 #include "../libcli/security/dom_sid.h"
40 #include "../libcli/security/security_token.h"
41 #include "lib/id_cache.h"
44 /* Internal message queue for deferred opens. */
45 struct pending_message_list
{
46 struct pending_message_list
*next
, *prev
;
47 struct timeval request_time
; /* When was this first issued? */
48 struct smbd_server_connection
*sconn
;
49 struct tevent_timer
*te
;
50 struct smb_perfcount_data pcd
;
55 DATA_BLOB private_data
;
58 static void construct_reply_common(struct smb_request
*req
, const char *inbuf
,
60 static struct pending_message_list
*get_deferred_open_message_smb(
61 struct smbd_server_connection
*sconn
, uint64_t mid
);
62 static bool smb_splice_chain(uint8_t **poutbuf
, const uint8_t *andx_buf
);
64 static bool smbd_lock_socket_internal(struct smbd_server_connection
*sconn
)
68 if (sconn
->smb1
.echo_handler
.socket_lock_fd
== -1) {
72 sconn
->smb1
.echo_handler
.ref_count
++;
74 if (sconn
->smb1
.echo_handler
.ref_count
> 1) {
78 DEBUG(10,("pid[%d] wait for socket lock\n", (int)getpid()));
82 sconn
->smb1
.echo_handler
.socket_lock_fd
,
83 F_SETLKW
, 0, 0, F_WRLCK
);
84 } while (!ok
&& (errno
== EINTR
));
87 DEBUG(1, ("fcntl_lock failed: %s\n", strerror(errno
)));
91 DEBUG(10,("pid[%d] got socket lock\n", (int)getpid()));
96 void smbd_lock_socket(struct smbd_server_connection
*sconn
)
98 if (!smbd_lock_socket_internal(sconn
)) {
99 exit_server_cleanly("failed to lock socket");
103 static bool smbd_unlock_socket_internal(struct smbd_server_connection
*sconn
)
107 if (sconn
->smb1
.echo_handler
.socket_lock_fd
== -1) {
111 sconn
->smb1
.echo_handler
.ref_count
--;
113 if (sconn
->smb1
.echo_handler
.ref_count
> 0) {
119 sconn
->smb1
.echo_handler
.socket_lock_fd
,
120 F_SETLKW
, 0, 0, F_UNLCK
);
121 } while (!ok
&& (errno
== EINTR
));
124 DEBUG(1, ("fcntl_lock failed: %s\n", strerror(errno
)));
128 DEBUG(10,("pid[%d] unlocked socket\n", (int)getpid()));
133 void smbd_unlock_socket(struct smbd_server_connection
*sconn
)
135 if (!smbd_unlock_socket_internal(sconn
)) {
136 exit_server_cleanly("failed to unlock socket");
140 /* Accessor function for smb_read_error for smbd functions. */
142 /****************************************************************************
144 ****************************************************************************/
146 bool srv_send_smb(struct smbd_server_connection
*sconn
, char *buffer
,
147 bool do_signing
, uint32_t seqnum
,
149 struct smb_perfcount_data
*pcd
)
153 char *buf_out
= buffer
;
155 smbd_lock_socket(sconn
);
158 /* Sign the outgoing packet if required. */
159 srv_calculate_sign_mac(sconn
, buf_out
, seqnum
);
163 NTSTATUS status
= srv_encrypt_buffer(sconn
, buffer
, &buf_out
);
164 if (!NT_STATUS_IS_OK(status
)) {
165 DEBUG(0, ("send_smb: SMB encryption failed "
166 "on outgoing packet! Error %s\n",
167 nt_errstr(status
) ));
173 len
= smb_len_large(buf_out
) + 4;
175 ret
= write_data(sconn
->sock
, buf_out
, len
);
178 char addr
[INET6_ADDRSTRLEN
];
180 * Try and give an error message saying what
183 DEBUG(1,("pid[%d] Error writing %d bytes to client %s. %d. (%s)\n",
184 (int)getpid(), (int)len
,
185 get_peer_addr(sconn
->sock
, addr
, sizeof(addr
)),
186 (int)ret
, strerror(errno
) ));
188 srv_free_enc_buffer(sconn
, buf_out
);
192 SMB_PERFCOUNT_SET_MSGLEN_OUT(pcd
, len
);
193 srv_free_enc_buffer(sconn
, buf_out
);
195 SMB_PERFCOUNT_END(pcd
);
197 smbd_unlock_socket(sconn
);
201 /*******************************************************************
202 Setup the word count and byte count for a smb message.
203 ********************************************************************/
205 int srv_set_message(char *buf
,
210 if (zero
&& (num_words
|| num_bytes
)) {
211 memset(buf
+ smb_size
,'\0',num_words
*2 + num_bytes
);
213 SCVAL(buf
,smb_wct
,num_words
);
214 SSVAL(buf
,smb_vwv
+ num_words
*SIZEOFWORD
,num_bytes
);
215 smb_setlen(buf
,(smb_size
+ num_words
*2 + num_bytes
- 4));
216 return (smb_size
+ num_words
*2 + num_bytes
);
219 static bool valid_smb_header(struct smbd_server_connection
*sconn
,
220 const uint8_t *inbuf
)
222 if (is_encrypted_packet(sconn
, inbuf
)) {
226 * This used to be (strncmp(smb_base(inbuf),"\377SMB",4) == 0)
227 * but it just looks weird to call strncmp for this one.
229 return (IVAL(smb_base(inbuf
), 0) == 0x424D53FF);
232 /* Socket functions for smbd packet processing. */
234 static bool valid_packet_size(size_t len
)
237 * A WRITEX with CAP_LARGE_WRITEX can be 64k worth of data plus 65 bytes
238 * of header. Don't print the error if this fits.... JRA.
241 if (len
> (BUFFER_SIZE
+ LARGE_WRITEX_HDR_SIZE
)) {
242 DEBUG(0,("Invalid packet length! (%lu bytes).\n",
243 (unsigned long)len
));
249 static NTSTATUS
read_packet_remainder(int fd
, char *buffer
,
250 unsigned int timeout
, ssize_t len
)
258 status
= read_fd_with_timeout(fd
, buffer
, len
, len
, timeout
, NULL
);
259 if (!NT_STATUS_IS_OK(status
)) {
260 char addr
[INET6_ADDRSTRLEN
];
261 DEBUG(0, ("read_fd_with_timeout failed for client %s read "
263 get_peer_addr(fd
, addr
, sizeof(addr
)),
269 /****************************************************************************
270 Attempt a zerocopy writeX read. We know here that len > smb_size-4
271 ****************************************************************************/
274 * Unfortunately, earlier versions of smbclient/libsmbclient
275 * don't send this "standard" writeX header. I've fixed this
276 * for 3.2 but we'll use the old method with earlier versions.
277 * Windows and CIFSFS at least use this standard size. Not
281 #define STANDARD_WRITE_AND_X_HEADER_SIZE (smb_size - 4 + /* basic header */ \
282 (2*14) + /* word count (including bcc) */ \
285 static NTSTATUS
receive_smb_raw_talloc_partial_read(TALLOC_CTX
*mem_ctx
,
286 const char lenbuf
[4],
287 struct smbd_server_connection
*sconn
,
290 unsigned int timeout
,
294 /* Size of a WRITEX call (+4 byte len). */
295 char writeX_header
[4 + STANDARD_WRITE_AND_X_HEADER_SIZE
];
296 ssize_t len
= smb_len_large(lenbuf
); /* Could be a UNIX large writeX. */
300 memcpy(writeX_header
, lenbuf
, 4);
302 status
= read_fd_with_timeout(
303 sock
, writeX_header
+ 4,
304 STANDARD_WRITE_AND_X_HEADER_SIZE
,
305 STANDARD_WRITE_AND_X_HEADER_SIZE
,
308 if (!NT_STATUS_IS_OK(status
)) {
309 DEBUG(0, ("read_fd_with_timeout failed for client %s read "
311 tsocket_address_string(sconn
->remote_address
,
318 * Ok - now try and see if this is a possible
322 if (is_valid_writeX_buffer(sconn
, (uint8_t *)writeX_header
)) {
324 * If the data offset is beyond what
325 * we've read, drain the extra bytes.
327 uint16_t doff
= SVAL(writeX_header
,smb_vwv11
);
330 if (doff
> STANDARD_WRITE_AND_X_HEADER_SIZE
) {
331 size_t drain
= doff
- STANDARD_WRITE_AND_X_HEADER_SIZE
;
332 if (drain_socket(sock
, drain
) != drain
) {
333 smb_panic("receive_smb_raw_talloc_partial_read:"
334 " failed to drain pending bytes");
337 doff
= STANDARD_WRITE_AND_X_HEADER_SIZE
;
340 /* Spoof down the length and null out the bcc. */
341 set_message_bcc(writeX_header
, 0);
342 newlen
= smb_len(writeX_header
);
344 /* Copy the header we've written. */
346 *buffer
= (char *)talloc_memdup(mem_ctx
,
348 sizeof(writeX_header
));
350 if (*buffer
== NULL
) {
351 DEBUG(0, ("Could not allocate inbuf of length %d\n",
352 (int)sizeof(writeX_header
)));
353 return NT_STATUS_NO_MEMORY
;
356 /* Work out the remaining bytes. */
357 *p_unread
= len
- STANDARD_WRITE_AND_X_HEADER_SIZE
;
358 *len_ret
= newlen
+ 4;
362 if (!valid_packet_size(len
)) {
363 return NT_STATUS_INVALID_PARAMETER
;
367 * Not a valid writeX call. Just do the standard
371 *buffer
= talloc_array(mem_ctx
, char, len
+4);
373 if (*buffer
== NULL
) {
374 DEBUG(0, ("Could not allocate inbuf of length %d\n",
376 return NT_STATUS_NO_MEMORY
;
379 /* Copy in what we already read. */
382 4 + STANDARD_WRITE_AND_X_HEADER_SIZE
);
383 toread
= len
- STANDARD_WRITE_AND_X_HEADER_SIZE
;
386 status
= read_packet_remainder(
388 (*buffer
) + 4 + STANDARD_WRITE_AND_X_HEADER_SIZE
,
391 if (!NT_STATUS_IS_OK(status
)) {
392 DEBUG(10, ("receive_smb_raw_talloc_partial_read: %s\n",
402 static NTSTATUS
receive_smb_raw_talloc(TALLOC_CTX
*mem_ctx
,
403 struct smbd_server_connection
*sconn
,
405 char **buffer
, unsigned int timeout
,
406 size_t *p_unread
, size_t *plen
)
410 int min_recv_size
= lp_min_receive_file_size();
415 status
= read_smb_length_return_keepalive(sock
, lenbuf
, timeout
,
417 if (!NT_STATUS_IS_OK(status
)) {
421 if (CVAL(lenbuf
,0) == 0 && min_recv_size
&&
422 (smb_len_large(lenbuf
) > /* Could be a UNIX large writeX. */
423 (min_recv_size
+ STANDARD_WRITE_AND_X_HEADER_SIZE
)) &&
424 !srv_is_signing_active(sconn
) &&
425 sconn
->smb1
.echo_handler
.trusted_fde
== NULL
) {
427 return receive_smb_raw_talloc_partial_read(
428 mem_ctx
, lenbuf
, sconn
, sock
, buffer
, timeout
,
432 if (!valid_packet_size(len
)) {
433 return NT_STATUS_INVALID_PARAMETER
;
437 * The +4 here can't wrap, we've checked the length above already.
440 *buffer
= talloc_array(mem_ctx
, char, len
+4);
442 if (*buffer
== NULL
) {
443 DEBUG(0, ("Could not allocate inbuf of length %d\n",
445 return NT_STATUS_NO_MEMORY
;
448 memcpy(*buffer
, lenbuf
, sizeof(lenbuf
));
450 status
= read_packet_remainder(sock
, (*buffer
)+4, timeout
, len
);
451 if (!NT_STATUS_IS_OK(status
)) {
459 static NTSTATUS
receive_smb_talloc(TALLOC_CTX
*mem_ctx
,
460 struct smbd_server_connection
*sconn
,
462 char **buffer
, unsigned int timeout
,
463 size_t *p_unread
, bool *p_encrypted
,
466 bool trusted_channel
)
471 *p_encrypted
= false;
473 status
= receive_smb_raw_talloc(mem_ctx
, sconn
, sock
, buffer
, timeout
,
475 if (!NT_STATUS_IS_OK(status
)) {
476 DEBUG(NT_STATUS_EQUAL(status
, NT_STATUS_END_OF_FILE
)?5:1,
477 ("receive_smb_raw_talloc failed for client %s "
478 "read error = %s.\n",
479 tsocket_address_string(sconn
->remote_address
,
481 nt_errstr(status
)) );
485 if (is_encrypted_packet(sconn
, (uint8_t *)*buffer
)) {
486 status
= srv_decrypt_buffer(sconn
, *buffer
);
487 if (!NT_STATUS_IS_OK(status
)) {
488 DEBUG(0, ("receive_smb_talloc: SMB decryption failed on "
489 "incoming packet! Error %s\n",
490 nt_errstr(status
) ));
496 /* Check the incoming SMB signature. */
497 if (!srv_check_sign_mac(sconn
, *buffer
, seqnum
, trusted_channel
)) {
498 DEBUG(0, ("receive_smb: SMB Signature verification failed on "
499 "incoming packet!\n"));
500 return NT_STATUS_INVALID_NETWORK_RESPONSE
;
508 * Initialize a struct smb_request from an inbuf
511 static bool init_smb_request(struct smb_request
*req
,
512 struct smbd_server_connection
*sconn
,
514 size_t unread_bytes
, bool encrypted
,
517 struct smbXsrv_tcon
*tcon
;
520 size_t req_size
= smb_len(inbuf
) + 4;
522 /* Ensure we have at least smb_size bytes. */
523 if (req_size
< smb_size
) {
524 DEBUG(0,("init_smb_request: invalid request size %u\n",
525 (unsigned int)req_size
));
529 req
->request_time
= timeval_current();
530 now
= timeval_to_nttime(&req
->request_time
);
532 req
->cmd
= CVAL(inbuf
, smb_com
);
533 req
->flags2
= SVAL(inbuf
, smb_flg2
);
534 req
->smbpid
= SVAL(inbuf
, smb_pid
);
535 req
->mid
= (uint64_t)SVAL(inbuf
, smb_mid
);
536 req
->seqnum
= seqnum
;
537 req
->vuid
= SVAL(inbuf
, smb_uid
);
538 req
->tid
= SVAL(inbuf
, smb_tid
);
539 req
->wct
= CVAL(inbuf
, smb_wct
);
540 req
->vwv
= (const uint16_t *)(inbuf
+smb_vwv
);
541 req
->buflen
= smb_buflen(inbuf
);
542 req
->buf
= (const uint8_t *)smb_buf_const(inbuf
);
543 req
->unread_bytes
= unread_bytes
;
544 req
->encrypted
= encrypted
;
546 status
= smb1srv_tcon_lookup(sconn
->conn
, req
->tid
, now
, &tcon
);
547 if (NT_STATUS_IS_OK(status
)) {
548 req
->conn
= tcon
->compat
;
552 req
->chain_fsp
= NULL
;
554 req
->priv_paths
= NULL
;
556 smb_init_perfcount_data(&req
->pcd
);
558 /* Ensure we have at least wct words and 2 bytes of bcc. */
559 if (smb_size
+ req
->wct
*2 > req_size
) {
560 DEBUG(0,("init_smb_request: invalid wct number %u (size %u)\n",
561 (unsigned int)req
->wct
,
562 (unsigned int)req_size
));
565 /* Ensure bcc is correct. */
566 if (((const uint8_t *)smb_buf_const(inbuf
)) + req
->buflen
> inbuf
+ req_size
) {
567 DEBUG(0,("init_smb_request: invalid bcc number %u "
568 "(wct = %u, size %u)\n",
569 (unsigned int)req
->buflen
,
570 (unsigned int)req
->wct
,
571 (unsigned int)req_size
));
579 static void process_smb(struct smbd_server_connection
*conn
,
580 uint8_t *inbuf
, size_t nread
, size_t unread_bytes
,
581 uint32_t seqnum
, bool encrypted
,
582 struct smb_perfcount_data
*deferred_pcd
);
584 static void smbd_deferred_open_timer(struct tevent_context
*ev
,
585 struct tevent_timer
*te
,
586 struct timeval _tval
,
589 struct pending_message_list
*msg
= talloc_get_type(private_data
,
590 struct pending_message_list
);
591 struct smbd_server_connection
*sconn
= msg
->sconn
;
592 TALLOC_CTX
*mem_ctx
= talloc_tos();
593 uint64_t mid
= (uint64_t)SVAL(msg
->buf
.data
,smb_mid
);
596 inbuf
= (uint8_t *)talloc_memdup(mem_ctx
, msg
->buf
.data
,
599 exit_server("smbd_deferred_open_timer: talloc failed\n");
603 /* We leave this message on the queue so the open code can
604 know this is a retry. */
605 DEBUG(5,("smbd_deferred_open_timer: trigger mid %llu.\n",
606 (unsigned long long)mid
));
608 /* Mark the message as processed so this is not
609 * re-processed in error. */
610 msg
->processed
= true;
612 process_smb(sconn
, inbuf
,
614 msg
->seqnum
, msg
->encrypted
, &msg
->pcd
);
616 /* If it's still there and was processed, remove it. */
617 msg
= get_deferred_open_message_smb(sconn
, mid
);
618 if (msg
&& msg
->processed
) {
619 remove_deferred_open_message_smb(sconn
, mid
);
623 /****************************************************************************
624 Function to push a message onto the tail of a linked list of smb messages ready
626 ****************************************************************************/
628 static bool push_queued_message(struct smb_request
*req
,
629 struct timeval request_time
,
630 struct timeval end_time
,
631 char *private_data
, size_t private_len
)
633 int msg_len
= smb_len(req
->inbuf
) + 4;
634 struct pending_message_list
*msg
;
636 msg
= talloc_zero(NULL
, struct pending_message_list
);
639 DEBUG(0,("push_message: malloc fail (1)\n"));
642 msg
->sconn
= req
->sconn
;
644 msg
->buf
= data_blob_talloc(msg
, req
->inbuf
, msg_len
);
645 if(msg
->buf
.data
== NULL
) {
646 DEBUG(0,("push_message: malloc fail (2)\n"));
651 msg
->request_time
= request_time
;
652 msg
->seqnum
= req
->seqnum
;
653 msg
->encrypted
= req
->encrypted
;
654 msg
->processed
= false;
655 SMB_PERFCOUNT_DEFER_OP(&req
->pcd
, &msg
->pcd
);
658 msg
->private_data
= data_blob_talloc(msg
, private_data
,
660 if (msg
->private_data
.data
== NULL
) {
661 DEBUG(0,("push_message: malloc fail (3)\n"));
668 msg
->te
= tevent_add_timer(msg
->sconn
->ev_ctx
,
671 smbd_deferred_open_timer
,
674 DEBUG(0,("push_message: event_add_timed failed\n"));
680 DLIST_ADD_END(req
->sconn
->deferred_open_queue
, msg
,
681 struct pending_message_list
*);
683 DEBUG(10,("push_message: pushed message length %u on "
684 "deferred_open_queue\n", (unsigned int)msg_len
));
689 /****************************************************************************
690 Function to delete a sharing violation open message by mid.
691 ****************************************************************************/
693 void remove_deferred_open_message_smb(struct smbd_server_connection
*sconn
,
696 struct pending_message_list
*pml
;
698 if (sconn
->using_smb2
) {
699 remove_deferred_open_message_smb2(sconn
, mid
);
703 for (pml
= sconn
->deferred_open_queue
; pml
; pml
= pml
->next
) {
704 if (mid
== (uint64_t)SVAL(pml
->buf
.data
,smb_mid
)) {
705 DEBUG(10,("remove_deferred_open_message_smb: "
706 "deleting mid %llu len %u\n",
707 (unsigned long long)mid
,
708 (unsigned int)pml
->buf
.length
));
709 DLIST_REMOVE(sconn
->deferred_open_queue
, pml
);
716 /****************************************************************************
717 Move a sharing violation open retry message to the front of the list and
718 schedule it for immediate processing.
719 ****************************************************************************/
721 bool schedule_deferred_open_message_smb(struct smbd_server_connection
*sconn
,
724 struct pending_message_list
*pml
;
727 if (sconn
->using_smb2
) {
728 return schedule_deferred_open_message_smb2(sconn
, mid
);
731 for (pml
= sconn
->deferred_open_queue
; pml
; pml
= pml
->next
) {
732 uint64_t msg_mid
= (uint64_t)SVAL(pml
->buf
.data
,smb_mid
);
734 DEBUG(10,("schedule_deferred_open_message_smb: [%d] "
737 (unsigned long long)msg_mid
));
739 if (mid
== msg_mid
) {
740 struct tevent_timer
*te
;
742 if (pml
->processed
) {
743 /* A processed message should not be
745 DEBUG(0,("schedule_deferred_open_message_smb: LOGIC ERROR "
746 "message mid %llu was already processed\n",
747 (unsigned long long)msg_mid
));
751 DEBUG(10,("schedule_deferred_open_message_smb: "
752 "scheduling mid %llu\n",
753 (unsigned long long)mid
));
755 te
= tevent_add_timer(pml
->sconn
->ev_ctx
,
758 smbd_deferred_open_timer
,
761 DEBUG(10,("schedule_deferred_open_message_smb: "
762 "event_add_timed() failed, "
763 "skipping mid %llu\n",
764 (unsigned long long)msg_mid
));
767 TALLOC_FREE(pml
->te
);
769 DLIST_PROMOTE(sconn
->deferred_open_queue
, pml
);
774 DEBUG(10,("schedule_deferred_open_message_smb: failed to "
775 "find message mid %llu\n",
776 (unsigned long long)mid
));
781 /****************************************************************************
782 Return true if this mid is on the deferred queue and was not yet processed.
783 ****************************************************************************/
785 bool open_was_deferred(struct smbd_server_connection
*sconn
, uint64_t mid
)
787 struct pending_message_list
*pml
;
789 if (sconn
->using_smb2
) {
790 return open_was_deferred_smb2(sconn
, mid
);
793 for (pml
= sconn
->deferred_open_queue
; pml
; pml
= pml
->next
) {
794 if (((uint64_t)SVAL(pml
->buf
.data
,smb_mid
)) == mid
&& !pml
->processed
) {
801 /****************************************************************************
802 Return the message queued by this mid.
803 ****************************************************************************/
805 static struct pending_message_list
*get_deferred_open_message_smb(
806 struct smbd_server_connection
*sconn
, uint64_t mid
)
808 struct pending_message_list
*pml
;
810 for (pml
= sconn
->deferred_open_queue
; pml
; pml
= pml
->next
) {
811 if (((uint64_t)SVAL(pml
->buf
.data
,smb_mid
)) == mid
) {
818 /****************************************************************************
819 Get the state data queued by this mid.
820 ****************************************************************************/
822 bool get_deferred_open_message_state(struct smb_request
*smbreq
,
823 struct timeval
*p_request_time
,
826 struct pending_message_list
*pml
;
828 if (smbreq
->sconn
->using_smb2
) {
829 return get_deferred_open_message_state_smb2(smbreq
->smb2req
,
834 pml
= get_deferred_open_message_smb(smbreq
->sconn
, smbreq
->mid
);
838 if (p_request_time
) {
839 *p_request_time
= pml
->request_time
;
842 *pp_state
= (void *)pml
->private_data
.data
;
847 /****************************************************************************
848 Function to push a deferred open smb message onto a linked list of local smb
849 messages ready for processing.
850 ****************************************************************************/
852 bool push_deferred_open_message_smb(struct smb_request
*req
,
853 struct timeval request_time
,
854 struct timeval timeout
,
856 char *private_data
, size_t priv_len
)
858 struct timeval end_time
;
861 return push_deferred_open_message_smb2(req
->smb2req
,
869 if (req
->unread_bytes
) {
870 DEBUG(0,("push_deferred_open_message_smb: logic error ! "
871 "unread_bytes = %u\n",
872 (unsigned int)req
->unread_bytes
));
873 smb_panic("push_deferred_open_message_smb: "
874 "logic error unread_bytes != 0" );
877 end_time
= timeval_sum(&request_time
, &timeout
);
879 DEBUG(10,("push_deferred_open_message_smb: pushing message "
880 "len %u mid %llu timeout time [%u.%06u]\n",
881 (unsigned int) smb_len(req
->inbuf
)+4,
882 (unsigned long long)req
->mid
,
883 (unsigned int)end_time
.tv_sec
,
884 (unsigned int)end_time
.tv_usec
));
886 return push_queued_message(req
, request_time
, end_time
,
887 private_data
, priv_len
);
890 static void smbd_sig_term_handler(struct tevent_context
*ev
,
891 struct tevent_signal
*se
,
897 exit_server_cleanly("termination signal");
900 void smbd_setup_sig_term_handler(struct smbd_server_connection
*sconn
)
902 struct tevent_signal
*se
;
904 se
= tevent_add_signal(sconn
->ev_ctx
,
907 smbd_sig_term_handler
,
910 exit_server("failed to setup SIGTERM handler");
914 static void smbd_sig_hup_handler(struct tevent_context
*ev
,
915 struct tevent_signal
*se
,
921 struct smbd_server_connection
*sconn
=
922 talloc_get_type_abort(private_data
,
923 struct smbd_server_connection
);
925 change_to_root_user();
926 DEBUG(1,("Reloading services after SIGHUP\n"));
927 reload_services(sconn
, conn_snum_used
, false);
930 void smbd_setup_sig_hup_handler(struct smbd_server_connection
*sconn
)
932 struct tevent_signal
*se
;
934 se
= tevent_add_signal(sconn
->ev_ctx
,
937 smbd_sig_hup_handler
,
940 exit_server("failed to setup SIGHUP handler");
944 static void smbd_conf_updated(struct messaging_context
*msg
,
947 struct server_id server_id
,
950 struct smbd_server_connection
*sconn
=
951 talloc_get_type_abort(private_data
,
952 struct smbd_server_connection
);
954 DEBUG(10,("smbd_conf_updated: Got message saying smb.conf was "
955 "updated. Reloading.\n"));
956 change_to_root_user();
957 reload_services(sconn
, conn_snum_used
, false);
961 * Only allow 5 outstanding trans requests. We're allocating memory, so
965 NTSTATUS
allow_new_trans(struct trans_state
*list
, uint64_t mid
)
968 for (; list
!= NULL
; list
= list
->next
) {
970 if (list
->mid
== mid
) {
971 return NT_STATUS_INVALID_PARAMETER
;
977 return NT_STATUS_INSUFFICIENT_RESOURCES
;
984 These flags determine some of the permissions required to do an operation
986 Note that I don't set NEED_WRITE on some write operations because they
987 are used by some brain-dead clients when printing, and I don't want to
988 force write permissions on print services.
990 #define AS_USER (1<<0)
991 #define NEED_WRITE (1<<1) /* Must be paired with AS_USER */
992 #define TIME_INIT (1<<2)
993 #define CAN_IPC (1<<3) /* Must be paired with AS_USER */
994 #define AS_GUEST (1<<5) /* Must *NOT* be paired with AS_USER */
995 #define DO_CHDIR (1<<6)
998 define a list of possible SMB messages and their corresponding
999 functions. Any message that has a NULL function is unimplemented -
1000 please feel free to contribute implementations!
1002 static const struct smb_message_struct
{
1004 void (*fn
)(struct smb_request
*req
);
1006 } smb_messages
[256] = {
1008 /* 0x00 */ { "SMBmkdir",reply_mkdir
,AS_USER
| NEED_WRITE
},
1009 /* 0x01 */ { "SMBrmdir",reply_rmdir
,AS_USER
| NEED_WRITE
},
1010 /* 0x02 */ { "SMBopen",reply_open
,AS_USER
},
1011 /* 0x03 */ { "SMBcreate",reply_mknew
,AS_USER
},
1012 /* 0x04 */ { "SMBclose",reply_close
,AS_USER
| CAN_IPC
},
1013 /* 0x05 */ { "SMBflush",reply_flush
,AS_USER
},
1014 /* 0x06 */ { "SMBunlink",reply_unlink
,AS_USER
| NEED_WRITE
},
1015 /* 0x07 */ { "SMBmv",reply_mv
,AS_USER
| NEED_WRITE
},
1016 /* 0x08 */ { "SMBgetatr",reply_getatr
,AS_USER
},
1017 /* 0x09 */ { "SMBsetatr",reply_setatr
,AS_USER
| NEED_WRITE
},
1018 /* 0x0a */ { "SMBread",reply_read
,AS_USER
},
1019 /* 0x0b */ { "SMBwrite",reply_write
,AS_USER
| CAN_IPC
},
1020 /* 0x0c */ { "SMBlock",reply_lock
,AS_USER
},
1021 /* 0x0d */ { "SMBunlock",reply_unlock
,AS_USER
},
1022 /* 0x0e */ { "SMBctemp",reply_ctemp
,AS_USER
},
1023 /* 0x0f */ { "SMBmknew",reply_mknew
,AS_USER
},
1024 /* 0x10 */ { "SMBcheckpath",reply_checkpath
,AS_USER
},
1025 /* 0x11 */ { "SMBexit",reply_exit
,DO_CHDIR
},
1026 /* 0x12 */ { "SMBlseek",reply_lseek
,AS_USER
},
1027 /* 0x13 */ { "SMBlockread",reply_lockread
,AS_USER
},
1028 /* 0x14 */ { "SMBwriteunlock",reply_writeunlock
,AS_USER
},
1029 /* 0x15 */ { NULL
, NULL
, 0 },
1030 /* 0x16 */ { NULL
, NULL
, 0 },
1031 /* 0x17 */ { NULL
, NULL
, 0 },
1032 /* 0x18 */ { NULL
, NULL
, 0 },
1033 /* 0x19 */ { NULL
, NULL
, 0 },
1034 /* 0x1a */ { "SMBreadbraw",reply_readbraw
,AS_USER
},
1035 /* 0x1b */ { "SMBreadBmpx",reply_readbmpx
,AS_USER
},
1036 /* 0x1c */ { "SMBreadBs",reply_readbs
,AS_USER
},
1037 /* 0x1d */ { "SMBwritebraw",reply_writebraw
,AS_USER
},
1038 /* 0x1e */ { "SMBwriteBmpx",reply_writebmpx
,AS_USER
},
1039 /* 0x1f */ { "SMBwriteBs",reply_writebs
,AS_USER
},
1040 /* 0x20 */ { "SMBwritec", NULL
,0},
1041 /* 0x21 */ { NULL
, NULL
, 0 },
1042 /* 0x22 */ { "SMBsetattrE",reply_setattrE
,AS_USER
| NEED_WRITE
},
1043 /* 0x23 */ { "SMBgetattrE",reply_getattrE
,AS_USER
},
1044 /* 0x24 */ { "SMBlockingX",reply_lockingX
,AS_USER
},
1045 /* 0x25 */ { "SMBtrans",reply_trans
,AS_USER
| CAN_IPC
},
1046 /* 0x26 */ { "SMBtranss",reply_transs
,AS_USER
| CAN_IPC
},
1047 /* 0x27 */ { "SMBioctl",reply_ioctl
,0},
1048 /* 0x28 */ { "SMBioctls", NULL
,AS_USER
},
1049 /* 0x29 */ { "SMBcopy",reply_copy
,AS_USER
| NEED_WRITE
},
1050 /* 0x2a */ { "SMBmove", NULL
,AS_USER
| NEED_WRITE
},
1051 /* 0x2b */ { "SMBecho",reply_echo
,0},
1052 /* 0x2c */ { "SMBwriteclose",reply_writeclose
,AS_USER
},
1053 /* 0x2d */ { "SMBopenX",reply_open_and_X
,AS_USER
| CAN_IPC
},
1054 /* 0x2e */ { "SMBreadX",reply_read_and_X
,AS_USER
| CAN_IPC
},
1055 /* 0x2f */ { "SMBwriteX",reply_write_and_X
,AS_USER
| CAN_IPC
},
1056 /* 0x30 */ { NULL
, NULL
, 0 },
1057 /* 0x31 */ { NULL
, NULL
, 0 },
1058 /* 0x32 */ { "SMBtrans2",reply_trans2
, AS_USER
| CAN_IPC
},
1059 /* 0x33 */ { "SMBtranss2",reply_transs2
, AS_USER
| CAN_IPC
},
1060 /* 0x34 */ { "SMBfindclose",reply_findclose
,AS_USER
},
1061 /* 0x35 */ { "SMBfindnclose",reply_findnclose
,AS_USER
},
1062 /* 0x36 */ { NULL
, NULL
, 0 },
1063 /* 0x37 */ { NULL
, NULL
, 0 },
1064 /* 0x38 */ { NULL
, NULL
, 0 },
1065 /* 0x39 */ { NULL
, NULL
, 0 },
1066 /* 0x3a */ { NULL
, NULL
, 0 },
1067 /* 0x3b */ { NULL
, NULL
, 0 },
1068 /* 0x3c */ { NULL
, NULL
, 0 },
1069 /* 0x3d */ { NULL
, NULL
, 0 },
1070 /* 0x3e */ { NULL
, NULL
, 0 },
1071 /* 0x3f */ { NULL
, NULL
, 0 },
1072 /* 0x40 */ { NULL
, NULL
, 0 },
1073 /* 0x41 */ { NULL
, NULL
, 0 },
1074 /* 0x42 */ { NULL
, NULL
, 0 },
1075 /* 0x43 */ { NULL
, NULL
, 0 },
1076 /* 0x44 */ { NULL
, NULL
, 0 },
1077 /* 0x45 */ { NULL
, NULL
, 0 },
1078 /* 0x46 */ { NULL
, NULL
, 0 },
1079 /* 0x47 */ { NULL
, NULL
, 0 },
1080 /* 0x48 */ { NULL
, NULL
, 0 },
1081 /* 0x49 */ { NULL
, NULL
, 0 },
1082 /* 0x4a */ { NULL
, NULL
, 0 },
1083 /* 0x4b */ { NULL
, NULL
, 0 },
1084 /* 0x4c */ { NULL
, NULL
, 0 },
1085 /* 0x4d */ { NULL
, NULL
, 0 },
1086 /* 0x4e */ { NULL
, NULL
, 0 },
1087 /* 0x4f */ { NULL
, NULL
, 0 },
1088 /* 0x50 */ { NULL
, NULL
, 0 },
1089 /* 0x51 */ { NULL
, NULL
, 0 },
1090 /* 0x52 */ { NULL
, NULL
, 0 },
1091 /* 0x53 */ { NULL
, NULL
, 0 },
1092 /* 0x54 */ { NULL
, NULL
, 0 },
1093 /* 0x55 */ { NULL
, NULL
, 0 },
1094 /* 0x56 */ { NULL
, NULL
, 0 },
1095 /* 0x57 */ { NULL
, NULL
, 0 },
1096 /* 0x58 */ { NULL
, NULL
, 0 },
1097 /* 0x59 */ { NULL
, NULL
, 0 },
1098 /* 0x5a */ { NULL
, NULL
, 0 },
1099 /* 0x5b */ { NULL
, NULL
, 0 },
1100 /* 0x5c */ { NULL
, NULL
, 0 },
1101 /* 0x5d */ { NULL
, NULL
, 0 },
1102 /* 0x5e */ { NULL
, NULL
, 0 },
1103 /* 0x5f */ { NULL
, NULL
, 0 },
1104 /* 0x60 */ { NULL
, NULL
, 0 },
1105 /* 0x61 */ { NULL
, NULL
, 0 },
1106 /* 0x62 */ { NULL
, NULL
, 0 },
1107 /* 0x63 */ { NULL
, NULL
, 0 },
1108 /* 0x64 */ { NULL
, NULL
, 0 },
1109 /* 0x65 */ { NULL
, NULL
, 0 },
1110 /* 0x66 */ { NULL
, NULL
, 0 },
1111 /* 0x67 */ { NULL
, NULL
, 0 },
1112 /* 0x68 */ { NULL
, NULL
, 0 },
1113 /* 0x69 */ { NULL
, NULL
, 0 },
1114 /* 0x6a */ { NULL
, NULL
, 0 },
1115 /* 0x6b */ { NULL
, NULL
, 0 },
1116 /* 0x6c */ { NULL
, NULL
, 0 },
1117 /* 0x6d */ { NULL
, NULL
, 0 },
1118 /* 0x6e */ { NULL
, NULL
, 0 },
1119 /* 0x6f */ { NULL
, NULL
, 0 },
1120 /* 0x70 */ { "SMBtcon",reply_tcon
,0},
1121 /* 0x71 */ { "SMBtdis",reply_tdis
,DO_CHDIR
},
1122 /* 0x72 */ { "SMBnegprot",reply_negprot
,0},
1123 /* 0x73 */ { "SMBsesssetupX",reply_sesssetup_and_X
,0},
1124 /* 0x74 */ { "SMBulogoffX",reply_ulogoffX
, 0}, /* ulogoff doesn't give a valid TID */
1125 /* 0x75 */ { "SMBtconX",reply_tcon_and_X
,0},
1126 /* 0x76 */ { NULL
, NULL
, 0 },
1127 /* 0x77 */ { NULL
, NULL
, 0 },
1128 /* 0x78 */ { NULL
, NULL
, 0 },
1129 /* 0x79 */ { NULL
, NULL
, 0 },
1130 /* 0x7a */ { NULL
, NULL
, 0 },
1131 /* 0x7b */ { NULL
, NULL
, 0 },
1132 /* 0x7c */ { NULL
, NULL
, 0 },
1133 /* 0x7d */ { NULL
, NULL
, 0 },
1134 /* 0x7e */ { NULL
, NULL
, 0 },
1135 /* 0x7f */ { NULL
, NULL
, 0 },
1136 /* 0x80 */ { "SMBdskattr",reply_dskattr
,AS_USER
},
1137 /* 0x81 */ { "SMBsearch",reply_search
,AS_USER
},
1138 /* 0x82 */ { "SMBffirst",reply_search
,AS_USER
},
1139 /* 0x83 */ { "SMBfunique",reply_search
,AS_USER
},
1140 /* 0x84 */ { "SMBfclose",reply_fclose
,AS_USER
},
1141 /* 0x85 */ { NULL
, NULL
, 0 },
1142 /* 0x86 */ { NULL
, NULL
, 0 },
1143 /* 0x87 */ { NULL
, NULL
, 0 },
1144 /* 0x88 */ { NULL
, NULL
, 0 },
1145 /* 0x89 */ { NULL
, NULL
, 0 },
1146 /* 0x8a */ { NULL
, NULL
, 0 },
1147 /* 0x8b */ { NULL
, NULL
, 0 },
1148 /* 0x8c */ { NULL
, NULL
, 0 },
1149 /* 0x8d */ { NULL
, NULL
, 0 },
1150 /* 0x8e */ { NULL
, NULL
, 0 },
1151 /* 0x8f */ { NULL
, NULL
, 0 },
1152 /* 0x90 */ { NULL
, NULL
, 0 },
1153 /* 0x91 */ { NULL
, NULL
, 0 },
1154 /* 0x92 */ { NULL
, NULL
, 0 },
1155 /* 0x93 */ { NULL
, NULL
, 0 },
1156 /* 0x94 */ { NULL
, NULL
, 0 },
1157 /* 0x95 */ { NULL
, NULL
, 0 },
1158 /* 0x96 */ { NULL
, NULL
, 0 },
1159 /* 0x97 */ { NULL
, NULL
, 0 },
1160 /* 0x98 */ { NULL
, NULL
, 0 },
1161 /* 0x99 */ { NULL
, NULL
, 0 },
1162 /* 0x9a */ { NULL
, NULL
, 0 },
1163 /* 0x9b */ { NULL
, NULL
, 0 },
1164 /* 0x9c */ { NULL
, NULL
, 0 },
1165 /* 0x9d */ { NULL
, NULL
, 0 },
1166 /* 0x9e */ { NULL
, NULL
, 0 },
1167 /* 0x9f */ { NULL
, NULL
, 0 },
1168 /* 0xa0 */ { "SMBnttrans",reply_nttrans
, AS_USER
| CAN_IPC
},
1169 /* 0xa1 */ { "SMBnttranss",reply_nttranss
, AS_USER
| CAN_IPC
},
1170 /* 0xa2 */ { "SMBntcreateX",reply_ntcreate_and_X
, AS_USER
| CAN_IPC
},
1171 /* 0xa3 */ { NULL
, NULL
, 0 },
1172 /* 0xa4 */ { "SMBntcancel",reply_ntcancel
, 0 },
1173 /* 0xa5 */ { "SMBntrename",reply_ntrename
, AS_USER
| NEED_WRITE
},
1174 /* 0xa6 */ { NULL
, NULL
, 0 },
1175 /* 0xa7 */ { NULL
, NULL
, 0 },
1176 /* 0xa8 */ { NULL
, NULL
, 0 },
1177 /* 0xa9 */ { NULL
, NULL
, 0 },
1178 /* 0xaa */ { NULL
, NULL
, 0 },
1179 /* 0xab */ { NULL
, NULL
, 0 },
1180 /* 0xac */ { NULL
, NULL
, 0 },
1181 /* 0xad */ { NULL
, NULL
, 0 },
1182 /* 0xae */ { NULL
, NULL
, 0 },
1183 /* 0xaf */ { NULL
, NULL
, 0 },
1184 /* 0xb0 */ { NULL
, NULL
, 0 },
1185 /* 0xb1 */ { NULL
, NULL
, 0 },
1186 /* 0xb2 */ { NULL
, NULL
, 0 },
1187 /* 0xb3 */ { NULL
, NULL
, 0 },
1188 /* 0xb4 */ { NULL
, NULL
, 0 },
1189 /* 0xb5 */ { NULL
, NULL
, 0 },
1190 /* 0xb6 */ { NULL
, NULL
, 0 },
1191 /* 0xb7 */ { NULL
, NULL
, 0 },
1192 /* 0xb8 */ { NULL
, NULL
, 0 },
1193 /* 0xb9 */ { NULL
, NULL
, 0 },
1194 /* 0xba */ { NULL
, NULL
, 0 },
1195 /* 0xbb */ { NULL
, NULL
, 0 },
1196 /* 0xbc */ { NULL
, NULL
, 0 },
1197 /* 0xbd */ { NULL
, NULL
, 0 },
1198 /* 0xbe */ { NULL
, NULL
, 0 },
1199 /* 0xbf */ { NULL
, NULL
, 0 },
1200 /* 0xc0 */ { "SMBsplopen",reply_printopen
,AS_USER
},
1201 /* 0xc1 */ { "SMBsplwr",reply_printwrite
,AS_USER
},
1202 /* 0xc2 */ { "SMBsplclose",reply_printclose
,AS_USER
},
1203 /* 0xc3 */ { "SMBsplretq",reply_printqueue
,AS_USER
},
1204 /* 0xc4 */ { NULL
, NULL
, 0 },
1205 /* 0xc5 */ { NULL
, NULL
, 0 },
1206 /* 0xc6 */ { NULL
, NULL
, 0 },
1207 /* 0xc7 */ { NULL
, NULL
, 0 },
1208 /* 0xc8 */ { NULL
, NULL
, 0 },
1209 /* 0xc9 */ { NULL
, NULL
, 0 },
1210 /* 0xca */ { NULL
, NULL
, 0 },
1211 /* 0xcb */ { NULL
, NULL
, 0 },
1212 /* 0xcc */ { NULL
, NULL
, 0 },
1213 /* 0xcd */ { NULL
, NULL
, 0 },
1214 /* 0xce */ { NULL
, NULL
, 0 },
1215 /* 0xcf */ { NULL
, NULL
, 0 },
1216 /* 0xd0 */ { "SMBsends",reply_sends
,AS_GUEST
},
1217 /* 0xd1 */ { "SMBsendb", NULL
,AS_GUEST
},
1218 /* 0xd2 */ { "SMBfwdname", NULL
,AS_GUEST
},
1219 /* 0xd3 */ { "SMBcancelf", NULL
,AS_GUEST
},
1220 /* 0xd4 */ { "SMBgetmac", NULL
,AS_GUEST
},
1221 /* 0xd5 */ { "SMBsendstrt",reply_sendstrt
,AS_GUEST
},
1222 /* 0xd6 */ { "SMBsendend",reply_sendend
,AS_GUEST
},
1223 /* 0xd7 */ { "SMBsendtxt",reply_sendtxt
,AS_GUEST
},
1224 /* 0xd8 */ { NULL
, NULL
, 0 },
1225 /* 0xd9 */ { NULL
, NULL
, 0 },
1226 /* 0xda */ { NULL
, NULL
, 0 },
1227 /* 0xdb */ { NULL
, NULL
, 0 },
1228 /* 0xdc */ { NULL
, NULL
, 0 },
1229 /* 0xdd */ { NULL
, NULL
, 0 },
1230 /* 0xde */ { NULL
, NULL
, 0 },
1231 /* 0xdf */ { NULL
, NULL
, 0 },
1232 /* 0xe0 */ { NULL
, NULL
, 0 },
1233 /* 0xe1 */ { NULL
, NULL
, 0 },
1234 /* 0xe2 */ { NULL
, NULL
, 0 },
1235 /* 0xe3 */ { NULL
, NULL
, 0 },
1236 /* 0xe4 */ { NULL
, NULL
, 0 },
1237 /* 0xe5 */ { NULL
, NULL
, 0 },
1238 /* 0xe6 */ { NULL
, NULL
, 0 },
1239 /* 0xe7 */ { NULL
, NULL
, 0 },
1240 /* 0xe8 */ { NULL
, NULL
, 0 },
1241 /* 0xe9 */ { NULL
, NULL
, 0 },
1242 /* 0xea */ { NULL
, NULL
, 0 },
1243 /* 0xeb */ { NULL
, NULL
, 0 },
1244 /* 0xec */ { NULL
, NULL
, 0 },
1245 /* 0xed */ { NULL
, NULL
, 0 },
1246 /* 0xee */ { NULL
, NULL
, 0 },
1247 /* 0xef */ { NULL
, NULL
, 0 },
1248 /* 0xf0 */ { NULL
, NULL
, 0 },
1249 /* 0xf1 */ { NULL
, NULL
, 0 },
1250 /* 0xf2 */ { NULL
, NULL
, 0 },
1251 /* 0xf3 */ { NULL
, NULL
, 0 },
1252 /* 0xf4 */ { NULL
, NULL
, 0 },
1253 /* 0xf5 */ { NULL
, NULL
, 0 },
1254 /* 0xf6 */ { NULL
, NULL
, 0 },
1255 /* 0xf7 */ { NULL
, NULL
, 0 },
1256 /* 0xf8 */ { NULL
, NULL
, 0 },
1257 /* 0xf9 */ { NULL
, NULL
, 0 },
1258 /* 0xfa */ { NULL
, NULL
, 0 },
1259 /* 0xfb */ { NULL
, NULL
, 0 },
1260 /* 0xfc */ { NULL
, NULL
, 0 },
1261 /* 0xfd */ { NULL
, NULL
, 0 },
1262 /* 0xfe */ { NULL
, NULL
, 0 },
1263 /* 0xff */ { NULL
, NULL
, 0 }
1267 /*******************************************************************
1268 allocate and initialize a reply packet
1269 ********************************************************************/
1271 static bool create_outbuf(TALLOC_CTX
*mem_ctx
, struct smb_request
*req
,
1272 const char *inbuf
, char **outbuf
, uint8_t num_words
,
1275 size_t smb_len
= MIN_SMB_SIZE
+ VWV(num_words
) + num_bytes
;
1278 * Protect against integer wrap.
1279 * The SMB layer reply can be up to 0xFFFFFF bytes.
1281 if ((num_bytes
> 0xffffff) || (smb_len
> 0xffffff)) {
1283 if (asprintf(&msg
, "num_bytes too large: %u",
1284 (unsigned)num_bytes
) == -1) {
1285 msg
= discard_const_p(char, "num_bytes too large");
1291 * Here we include the NBT header for now.
1293 *outbuf
= talloc_array(mem_ctx
, char,
1294 NBT_HDR_SIZE
+ smb_len
);
1295 if (*outbuf
== NULL
) {
1299 construct_reply_common(req
, inbuf
, *outbuf
);
1300 srv_set_message(*outbuf
, num_words
, num_bytes
, false);
1302 * Zero out the word area, the caller has to take care of the bcc area
1305 if (num_words
!= 0) {
1306 memset(*outbuf
+ (NBT_HDR_SIZE
+ HDR_VWV
), 0, VWV(num_words
));
1312 void reply_outbuf(struct smb_request
*req
, uint8 num_words
, uint32 num_bytes
)
1315 if (!create_outbuf(req
, req
, (const char *)req
->inbuf
, &outbuf
, num_words
,
1317 smb_panic("could not allocate output buffer\n");
1319 req
->outbuf
= (uint8_t *)outbuf
;
1323 /*******************************************************************
1324 Dump a packet to a file.
1325 ********************************************************************/
1327 static void smb_dump(const char *name
, int type
, const char *data
)
1332 if (DEBUGLEVEL
< 50) {
1336 len
= smb_len_tcp(data
)+4;
1337 for (i
=1;i
<100;i
++) {
1338 fname
= talloc_asprintf(talloc_tos(),
1342 type
? "req" : "resp");
1343 if (fname
== NULL
) {
1346 fd
= open(fname
, O_WRONLY
|O_CREAT
|O_EXCL
, 0644);
1347 if (fd
!= -1 || errno
!= EEXIST
) break;
1351 ssize_t ret
= write(fd
, data
, len
);
1353 DEBUG(0,("smb_dump: problem: write returned %d\n", (int)ret
));
1355 DEBUG(0,("created %s len %lu\n", fname
, (unsigned long)len
));
1360 /****************************************************************************
1361 Prepare everything for calling the actual request function, and potentially
1362 call the request function via the "new" interface.
1364 Return False if the "legacy" function needs to be called, everything is
1367 Return True if we're done.
1369 I know this API sucks, but it is the one with the least code change I could
1371 ****************************************************************************/
1373 static connection_struct
*switch_message(uint8 type
, struct smb_request
*req
)
1376 uint64_t session_tag
;
1377 connection_struct
*conn
= NULL
;
1378 struct smbd_server_connection
*sconn
= req
->sconn
;
1379 NTTIME now
= timeval_to_nttime(&req
->request_time
);
1380 struct smbXsrv_session
*session
= NULL
;
1385 if (smb_messages
[type
].fn
== NULL
) {
1386 DEBUG(0,("Unknown message type %d!\n",type
));
1387 smb_dump("Unknown", 1, (const char *)req
->inbuf
);
1388 reply_unknown_new(req
, type
);
1392 flags
= smb_messages
[type
].flags
;
1394 /* In share mode security we must ignore the vuid. */
1395 session_tag
= req
->vuid
;
1398 DEBUG(3,("switch message %s (pid %d) conn 0x%lx\n", smb_fn_name(type
),
1399 (int)getpid(), (unsigned long)conn
));
1401 smb_dump(smb_fn_name(type
), 1, (const char *)req
->inbuf
);
1403 /* Ensure this value is replaced in the incoming packet. */
1404 SSVAL(discard_const_p(uint8_t, req
->inbuf
),smb_uid
,session_tag
);
1407 * Ensure the correct username is in current_user_info. This is a
1408 * really ugly bugfix for problems with multiple session_setup_and_X's
1409 * being done and allowing %U and %G substitutions to work correctly.
1410 * There is a reason this code is done here, don't move it unless you
1411 * know what you're doing... :-).
1416 * lookup an existing session
1418 * Note: for now we only check for NT_STATUS_NETWORK_SESSION_EXPIRED
1419 * here, the main check is still in change_to_user()
1421 status
= smb1srv_session_lookup(sconn
->conn
,
1425 if (NT_STATUS_EQUAL(status
, NT_STATUS_NETWORK_SESSION_EXPIRED
)) {
1428 status
= NT_STATUS_OK
;
1431 DEBUG(1,("Error: session %llu is expired, mid=%llu.\n",
1432 (unsigned long long)session_tag
,
1433 (unsigned long long)req
->mid
));
1434 reply_nterror(req
, NT_STATUS_NETWORK_SESSION_EXPIRED
);
1439 if (session_tag
!= sconn
->conn
->last_session_id
) {
1440 struct user_struct
*vuser
= NULL
;
1442 sconn
->conn
->last_session_id
= session_tag
;
1444 vuser
= session
->compat
;
1447 set_current_user_info(
1448 vuser
->session_info
->unix_info
->sanitized_username
,
1449 vuser
->session_info
->unix_info
->unix_name
,
1450 vuser
->session_info
->info
->domain_name
);
1454 /* Does this call need to be run as the connected user? */
1455 if (flags
& AS_USER
) {
1457 /* Does this call need a valid tree connection? */
1460 * Amazingly, the error code depends on the command
1463 if (type
== SMBntcreateX
) {
1464 reply_nterror(req
, NT_STATUS_INVALID_HANDLE
);
1466 reply_nterror(req
, NT_STATUS_NETWORK_NAME_DELETED
);
1471 if (!change_to_user(conn
,session_tag
)) {
1472 DEBUG(0, ("Error: Could not change to user. Removing "
1473 "deferred open, mid=%llu.\n",
1474 (unsigned long long)req
->mid
));
1475 reply_force_doserror(req
, ERRSRV
, ERRbaduid
);
1479 /* All NEED_WRITE and CAN_IPC flags must also have AS_USER. */
1481 /* Does it need write permission? */
1482 if ((flags
& NEED_WRITE
) && !CAN_WRITE(conn
)) {
1483 reply_nterror(req
, NT_STATUS_MEDIA_WRITE_PROTECTED
);
1487 /* IPC services are limited */
1488 if (IS_IPC(conn
) && !(flags
& CAN_IPC
)) {
1489 reply_nterror(req
, NT_STATUS_ACCESS_DENIED
);
1493 /* This call needs to be run as root */
1494 change_to_root_user();
1497 /* load service specific parameters */
1499 if (req
->encrypted
) {
1500 conn
->encrypted_tid
= true;
1501 /* encrypted required from now on. */
1502 conn
->encrypt_level
= SMB_SIGNING_REQUIRED
;
1503 } else if (ENCRYPTION_REQUIRED(conn
)) {
1504 if (req
->cmd
!= SMBtrans2
&& req
->cmd
!= SMBtranss2
) {
1505 DEBUG(1,("service[%s] requires encryption"
1506 "%s ACCESS_DENIED. mid=%llu\n",
1507 lp_servicename(talloc_tos(), SNUM(conn
)),
1509 (unsigned long long)req
->mid
));
1510 reply_nterror(req
, NT_STATUS_ACCESS_DENIED
);
1515 if (!set_current_service(conn
,SVAL(req
->inbuf
,smb_flg
),
1516 (flags
& (AS_USER
|DO_CHDIR
)
1518 reply_nterror(req
, NT_STATUS_ACCESS_DENIED
);
1521 conn
->num_smb_operations
++;
1525 * Does this protocol need to be run as guest? (Only archane
1526 * messenger service requests have this...)
1528 if (flags
& AS_GUEST
) {
1532 if (!change_to_guest()) {
1533 reply_nterror(req
, NT_STATUS_ACCESS_DENIED
);
1537 raddr
= tsocket_address_inet_addr_string(sconn
->remote_address
,
1539 if (raddr
== NULL
) {
1540 reply_nterror(req
, NT_STATUS_NO_MEMORY
);
1545 * Haven't we checked this in smbd_process already???
1548 ok
= allow_access(lp_hostsdeny(-1), lp_hostsallow(-1),
1549 sconn
->remote_hostname
, raddr
);
1553 reply_nterror(req
, NT_STATUS_ACCESS_DENIED
);
1558 smb_messages
[type
].fn(req
);
1562 /****************************************************************************
1563 Construct a reply to the incoming packet.
1564 ****************************************************************************/
1566 static void construct_reply(struct smbd_server_connection
*sconn
,
1567 char *inbuf
, int size
, size_t unread_bytes
,
1568 uint32_t seqnum
, bool encrypted
,
1569 struct smb_perfcount_data
*deferred_pcd
)
1571 connection_struct
*conn
;
1572 struct smb_request
*req
;
1574 if (!(req
= talloc(talloc_tos(), struct smb_request
))) {
1575 smb_panic("could not allocate smb_request");
1578 if (!init_smb_request(req
, sconn
, (uint8
*)inbuf
, unread_bytes
,
1579 encrypted
, seqnum
)) {
1580 exit_server_cleanly("Invalid SMB request");
1583 req
->inbuf
= (uint8_t *)talloc_move(req
, &inbuf
);
1585 /* we popped this message off the queue - keep original perf data */
1587 req
->pcd
= *deferred_pcd
;
1589 SMB_PERFCOUNT_START(&req
->pcd
);
1590 SMB_PERFCOUNT_SET_OP(&req
->pcd
, req
->cmd
);
1591 SMB_PERFCOUNT_SET_MSGLEN_IN(&req
->pcd
, size
);
1594 conn
= switch_message(req
->cmd
, req
);
1596 if (req
->outbuf
== NULL
) {
1600 if (CVAL(req
->outbuf
,0) == 0) {
1601 show_msg((char *)req
->outbuf
);
1604 if (!srv_send_smb(req
->sconn
,
1605 (char *)req
->outbuf
,
1606 true, req
->seqnum
+1,
1607 IS_CONN_ENCRYPTED(conn
)||req
->encrypted
,
1609 exit_server_cleanly("construct_reply: srv_send_smb failed.");
1617 static void construct_reply_chain(struct smbd_server_connection
*sconn
,
1618 char *inbuf
, int size
, uint32_t seqnum
,
1620 struct smb_perfcount_data
*deferred_pcd
)
1622 struct smb_request
**reqs
= NULL
;
1623 struct smb_request
*req
;
1627 ok
= smb1_parse_chain(talloc_tos(), (uint8_t *)inbuf
, sconn
, encrypted
,
1628 seqnum
, &reqs
, &num_reqs
);
1630 char errbuf
[smb_size
];
1631 error_packet(errbuf
, 0, 0, NT_STATUS_INVALID_PARAMETER
,
1632 __LINE__
, __FILE__
);
1633 if (!srv_send_smb(sconn
, errbuf
, true, seqnum
, encrypted
,
1635 exit_server_cleanly("construct_reply_chain: "
1636 "srv_send_smb failed.");
1642 req
->inbuf
= (uint8_t *)talloc_move(reqs
, &inbuf
);
1644 req
->conn
= switch_message(req
->cmd
, req
);
1646 if (req
->outbuf
== NULL
) {
1648 * Request has suspended itself, will come
1653 smb_request_done(req
);
1657 * To be called from an async SMB handler that is potentially chained
1658 * when it is finished for shipping.
1661 void smb_request_done(struct smb_request
*req
)
1663 struct smb_request
**reqs
= NULL
;
1664 struct smb_request
*first_req
;
1665 size_t i
, num_reqs
, next_index
;
1668 if (req
->chain
== NULL
) {
1674 num_reqs
= talloc_array_length(reqs
);
1676 for (i
=0; i
<num_reqs
; i
++) {
1677 if (reqs
[i
] == req
) {
1681 if (i
== num_reqs
) {
1683 * Invalid chain, should not happen
1685 status
= NT_STATUS_INTERNAL_ERROR
;
1690 while ((next_index
< num_reqs
) && (IVAL(req
->outbuf
, smb_rcls
) == 0)) {
1691 struct smb_request
*next
= reqs
[next_index
];
1692 struct smbXsrv_tcon
*tcon
;
1693 NTTIME now
= timeval_to_nttime(&req
->request_time
);
1695 next
->vuid
= SVAL(req
->outbuf
, smb_uid
);
1696 next
->tid
= SVAL(req
->outbuf
, smb_tid
);
1697 status
= smb1srv_tcon_lookup(req
->sconn
->conn
, req
->tid
,
1699 if (NT_STATUS_IS_OK(status
)) {
1700 req
->conn
= tcon
->compat
;
1704 next
->chain_fsp
= req
->chain_fsp
;
1705 next
->inbuf
= req
->inbuf
;
1708 req
->conn
= switch_message(req
->cmd
, req
);
1710 if (req
->outbuf
== NULL
) {
1712 * Request has suspended itself, will come
1720 first_req
= reqs
[0];
1722 for (i
=1; i
<next_index
; i
++) {
1725 ok
= smb_splice_chain(&first_req
->outbuf
, reqs
[i
]->outbuf
);
1727 status
= NT_STATUS_INTERNAL_ERROR
;
1732 SSVAL(first_req
->outbuf
, smb_uid
, SVAL(req
->outbuf
, smb_uid
));
1733 SSVAL(first_req
->outbuf
, smb_tid
, SVAL(req
->outbuf
, smb_tid
));
1736 * This scary statement intends to set the
1737 * FLAGS2_32_BIT_ERROR_CODES flg2 field in first_req->outbuf
1738 * to the value last_req->outbuf carries
1740 SSVAL(first_req
->outbuf
, smb_flg2
,
1741 (SVAL(first_req
->outbuf
, smb_flg2
) & ~FLAGS2_32_BIT_ERROR_CODES
)
1742 |(SVAL(req
->outbuf
, smb_flg2
) & FLAGS2_32_BIT_ERROR_CODES
));
1745 * Transfer the error codes from the subrequest to the main one
1747 SSVAL(first_req
->outbuf
, smb_rcls
, SVAL(req
->outbuf
, smb_rcls
));
1748 SSVAL(first_req
->outbuf
, smb_err
, SVAL(req
->outbuf
, smb_err
));
1751 first_req
->outbuf
, talloc_get_size(first_req
->outbuf
) - 4);
1754 if (!srv_send_smb(first_req
->sconn
,
1755 (char *)first_req
->outbuf
,
1756 true, first_req
->seqnum
+1,
1757 IS_CONN_ENCRYPTED(req
->conn
)||first_req
->encrypted
,
1759 exit_server_cleanly("construct_reply_chain: srv_send_smb "
1762 TALLOC_FREE(req
); /* non-chained case */
1763 TALLOC_FREE(reqs
); /* chained case */
1768 char errbuf
[smb_size
];
1769 error_packet(errbuf
, 0, 0, status
, __LINE__
, __FILE__
);
1770 if (!srv_send_smb(req
->sconn
, errbuf
, true,
1771 req
->seqnum
+1, req
->encrypted
,
1773 exit_server_cleanly("construct_reply_chain: "
1774 "srv_send_smb failed.");
1777 TALLOC_FREE(req
); /* non-chained case */
1778 TALLOC_FREE(reqs
); /* chained case */
1781 /****************************************************************************
1782 Process an smb from the client
1783 ****************************************************************************/
1784 static void process_smb(struct smbd_server_connection
*sconn
,
1785 uint8_t *inbuf
, size_t nread
, size_t unread_bytes
,
1786 uint32_t seqnum
, bool encrypted
,
1787 struct smb_perfcount_data
*deferred_pcd
)
1789 int msg_type
= CVAL(inbuf
,0);
1791 DO_PROFILE_INC(smb_count
);
1793 DEBUG( 6, ( "got message type 0x%x of len 0x%x\n", msg_type
,
1795 DEBUG(3, ("Transaction %d of length %d (%u toread)\n",
1796 sconn
->trans_num
, (int)nread
, (unsigned int)unread_bytes
));
1798 if (msg_type
!= NBSSmessage
) {
1800 * NetBIOS session request, keepalive, etc.
1802 reply_special(sconn
, (char *)inbuf
, nread
);
1806 if (sconn
->using_smb2
) {
1807 /* At this point we're not really using smb2,
1808 * we make the decision here.. */
1809 if (smbd_is_smb2_header(inbuf
, nread
)) {
1810 smbd_smb2_first_negprot(sconn
, inbuf
, nread
);
1812 } else if (nread
>= smb_size
&& valid_smb_header(sconn
, inbuf
)
1813 && CVAL(inbuf
, smb_com
) != 0x72) {
1814 /* This is a non-negprot SMB1 packet.
1815 Disable SMB2 from now on. */
1816 sconn
->using_smb2
= false;
1820 /* Make sure this is an SMB packet. smb_size contains NetBIOS header
1821 * so subtract 4 from it. */
1822 if ((nread
< (smb_size
- 4)) || !valid_smb_header(sconn
, inbuf
)) {
1823 DEBUG(2,("Non-SMB packet of length %d. Terminating server\n",
1826 /* special magic for immediate exit */
1828 (IVAL(inbuf
, 4) == 0x74697865) &&
1829 lp_parm_bool(-1, "smbd", "suicide mode", false)) {
1830 uint8_t exitcode
= CVAL(inbuf
, 8);
1831 DEBUG(1, ("Exiting immediately with code %d\n",
1836 exit_server_cleanly("Non-SMB packet");
1839 show_msg((char *)inbuf
);
1841 if ((unread_bytes
== 0) && smb1_is_chain(inbuf
)) {
1842 construct_reply_chain(sconn
, (char *)inbuf
, nread
,
1843 seqnum
, encrypted
, deferred_pcd
);
1845 construct_reply(sconn
, (char *)inbuf
, nread
, unread_bytes
,
1846 seqnum
, encrypted
, deferred_pcd
);
1852 sconn
->num_requests
++;
1854 /* The timeout_processing function isn't run nearly
1855 often enough to implement 'max log size' without
1856 overrunning the size of the file by many megabytes.
1857 This is especially true if we are running at debug
1858 level 10. Checking every 50 SMBs is a nice
1859 tradeoff of performance vs log file size overrun. */
1861 if ((sconn
->num_requests
% 50) == 0 &&
1862 need_to_check_log_size()) {
1863 change_to_root_user();
1868 /****************************************************************************
1869 Return a string containing the function name of a SMB command.
1870 ****************************************************************************/
1872 const char *smb_fn_name(int type
)
1874 const char *unknown_name
= "SMBunknown";
1876 if (smb_messages
[type
].name
== NULL
)
1877 return(unknown_name
);
1879 return(smb_messages
[type
].name
);
1882 /****************************************************************************
1883 Helper functions for contruct_reply.
1884 ****************************************************************************/
1886 void add_to_common_flags2(uint32 v
)
1891 void remove_from_common_flags2(uint32 v
)
1893 common_flags2
&= ~v
;
1896 static void construct_reply_common(struct smb_request
*req
, const char *inbuf
,
1899 uint16_t in_flags2
= SVAL(inbuf
,smb_flg2
);
1900 uint16_t out_flags2
= common_flags2
;
1902 out_flags2
|= in_flags2
& FLAGS2_UNICODE_STRINGS
;
1903 out_flags2
|= in_flags2
& FLAGS2_SMB_SECURITY_SIGNATURES
;
1904 out_flags2
|= in_flags2
& FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED
;
1906 srv_set_message(outbuf
,0,0,false);
1908 SCVAL(outbuf
, smb_com
, req
->cmd
);
1909 SIVAL(outbuf
,smb_rcls
,0);
1910 SCVAL(outbuf
,smb_flg
, FLAG_REPLY
| (CVAL(inbuf
,smb_flg
) & FLAG_CASELESS_PATHNAMES
));
1911 SSVAL(outbuf
,smb_flg2
, out_flags2
);
1912 memset(outbuf
+smb_pidhigh
,'\0',(smb_tid
-smb_pidhigh
));
1913 memcpy(outbuf
+smb_ss_field
, inbuf
+smb_ss_field
, 8);
1915 SSVAL(outbuf
,smb_tid
,SVAL(inbuf
,smb_tid
));
1916 SSVAL(outbuf
,smb_pid
,SVAL(inbuf
,smb_pid
));
1917 SSVAL(outbuf
,smb_uid
,SVAL(inbuf
,smb_uid
));
1918 SSVAL(outbuf
,smb_mid
,SVAL(inbuf
,smb_mid
));
1921 void construct_reply_common_req(struct smb_request
*req
, char *outbuf
)
1923 construct_reply_common(req
, (const char *)req
->inbuf
, outbuf
);
1927 * @brief Find the smb_cmd offset of the last command pushed
1928 * @param[in] buf The buffer we're building up
1929 * @retval Where can we put our next andx cmd?
1931 * While chaining requests, the "next" request we're looking at needs to put
1932 * its SMB_Command before the data the previous request already built up added
1933 * to the chain. Find the offset to the place where we have to put our cmd.
1936 static bool find_andx_cmd_ofs(uint8_t *buf
, size_t *pofs
)
1941 cmd
= CVAL(buf
, smb_com
);
1943 if (!is_andx_req(cmd
)) {
1949 while (CVAL(buf
, ofs
) != 0xff) {
1951 if (!is_andx_req(CVAL(buf
, ofs
))) {
1956 * ofs is from start of smb header, so add the 4 length
1957 * bytes. The next cmd is right after the wct field.
1959 ofs
= SVAL(buf
, ofs
+2) + 4 + 1;
1961 if (ofs
+4 >= talloc_get_size(buf
)) {
1971 * @brief Do the smb chaining at a buffer level
1972 * @param[in] poutbuf Pointer to the talloc'ed buffer to be modified
1973 * @param[in] andx_buf Buffer to be appended
1976 static bool smb_splice_chain(uint8_t **poutbuf
, const uint8_t *andx_buf
)
1978 uint8_t smb_command
= CVAL(andx_buf
, smb_com
);
1979 uint8_t wct
= CVAL(andx_buf
, smb_wct
);
1980 const uint16_t *vwv
= (const uint16_t *)(andx_buf
+ smb_vwv
);
1981 uint32_t num_bytes
= smb_buflen(andx_buf
);
1982 const uint8_t *bytes
= (const uint8_t *)smb_buf_const(andx_buf
);
1985 size_t old_size
, new_size
;
1987 size_t chain_padding
= 0;
1988 size_t andx_cmd_ofs
;
1991 old_size
= talloc_get_size(*poutbuf
);
1993 if ((old_size
% 4) != 0) {
1995 * Align the wct field of subsequent requests to a 4-byte
1998 chain_padding
= 4 - (old_size
% 4);
2002 * After the old request comes the new wct field (1 byte), the vwv's
2003 * and the num_bytes field.
2006 new_size
= old_size
+ chain_padding
+ 1 + wct
* sizeof(uint16_t) + 2;
2007 new_size
+= num_bytes
;
2009 if ((smb_command
!= SMBwriteX
) && (new_size
> 0xffff)) {
2010 DEBUG(1, ("smb_splice_chain: %u bytes won't fit\n",
2011 (unsigned)new_size
));
2015 outbuf
= talloc_realloc(NULL
, *poutbuf
, uint8_t, new_size
);
2016 if (outbuf
== NULL
) {
2017 DEBUG(0, ("talloc failed\n"));
2022 if (!find_andx_cmd_ofs(outbuf
, &andx_cmd_ofs
)) {
2023 DEBUG(1, ("invalid command chain\n"));
2024 *poutbuf
= talloc_realloc(NULL
, *poutbuf
, uint8_t, old_size
);
2028 if (chain_padding
!= 0) {
2029 memset(outbuf
+ old_size
, 0, chain_padding
);
2030 old_size
+= chain_padding
;
2033 SCVAL(outbuf
, andx_cmd_ofs
, smb_command
);
2034 SSVAL(outbuf
, andx_cmd_ofs
+ 2, old_size
- 4);
2039 * Push the chained request:
2044 SCVAL(outbuf
, ofs
, wct
);
2051 memcpy(outbuf
+ ofs
, vwv
, sizeof(uint16_t) * wct
);
2056 * Read&X has an offset into its data buffer at
2057 * vwv[6]. reply_read_andx has no idea anymore that it's
2058 * running from within a chain, so we have to fix up the
2061 * Although it looks disgusting at this place, I want to keep
2062 * it here. The alternative would be to push knowledge about
2063 * the andx chain down into read&x again.
2066 if (smb_command
== SMBreadX
) {
2067 uint8_t *bytes_addr
;
2071 * Invalid read&x response
2076 bytes_addr
= outbuf
+ ofs
/* vwv start */
2077 + sizeof(uint16_t) * wct
/* vwv array */
2078 + sizeof(uint16_t); /* bcc */
2080 SSVAL(outbuf
+ ofs
, 6 * sizeof(uint16_t),
2081 bytes_addr
- outbuf
- 4);
2084 ofs
+= sizeof(uint16_t) * wct
;
2090 SSVAL(outbuf
, ofs
, num_bytes
);
2091 ofs
+= sizeof(uint16_t);
2097 memcpy(outbuf
+ ofs
, bytes
, num_bytes
);
2102 bool smb1_is_chain(const uint8_t *buf
)
2104 uint8_t cmd
, wct
, andx_cmd
;
2106 cmd
= CVAL(buf
, smb_com
);
2107 if (!is_andx_req(cmd
)) {
2110 wct
= CVAL(buf
, smb_wct
);
2114 andx_cmd
= CVAL(buf
, smb_vwv
);
2115 return (andx_cmd
!= 0xFF);
2118 bool smb1_walk_chain(const uint8_t *buf
,
2119 bool (*fn
)(uint8_t cmd
,
2120 uint8_t wct
, const uint16_t *vwv
,
2121 uint16_t num_bytes
, const uint8_t *bytes
,
2122 void *private_data
),
2125 size_t smblen
= smb_len(buf
);
2126 const char *smb_buf
= smb_base(buf
);
2127 uint8_t cmd
, chain_cmd
;
2129 const uint16_t *vwv
;
2131 const uint8_t *bytes
;
2133 cmd
= CVAL(buf
, smb_com
);
2134 wct
= CVAL(buf
, smb_wct
);
2135 vwv
= (const uint16_t *)(buf
+ smb_vwv
);
2136 num_bytes
= smb_buflen(buf
);
2137 bytes
= (const uint8_t *)smb_buf_const(buf
);
2139 if (!fn(cmd
, wct
, vwv
, num_bytes
, bytes
, private_data
)) {
2143 if (!is_andx_req(cmd
)) {
2150 chain_cmd
= CVAL(vwv
, 0);
2152 while (chain_cmd
!= 0xff) {
2153 uint32_t chain_offset
; /* uint32_t to avoid overflow */
2154 size_t length_needed
;
2155 ptrdiff_t vwv_offset
;
2157 chain_offset
= SVAL(vwv
+1, 0);
2160 * Check if the client tries to fool us. The chain
2161 * offset needs to point beyond the current request in
2162 * the chain, it needs to strictly grow. Otherwise we
2163 * might be tricked into an endless loop always
2164 * processing the same request over and over again. We
2165 * used to assume that vwv and the byte buffer array
2166 * in a chain are always attached, but OS/2 the
2167 * Write&X/Read&X chain puts the Read&X vwv array
2168 * right behind the Write&X vwv chain. The Write&X bcc
2169 * array is put behind the Read&X vwv array. So now we
2170 * check whether the chain offset points strictly
2171 * behind the previous vwv array. req->buf points
2172 * right after the vwv array of the previous
2174 * https://bugzilla.samba.org/show_bug.cgi?id=8360 for
2178 vwv_offset
= ((const char *)vwv
- smb_buf
);
2179 if (chain_offset
<= vwv_offset
) {
2184 * Next check: Make sure the chain offset does not
2185 * point beyond the overall smb request length.
2188 length_needed
= chain_offset
+1; /* wct */
2189 if (length_needed
> smblen
) {
2194 * Now comes the pointer magic. Goal here is to set up
2195 * vwv and buf correctly again. The chain offset (the
2196 * former vwv[1]) points at the new wct field.
2199 wct
= CVAL(smb_buf
, chain_offset
);
2201 if (is_andx_req(chain_cmd
) && (wct
< 2)) {
2206 * Next consistency check: Make the new vwv array fits
2207 * in the overall smb request.
2210 length_needed
+= (wct
+1)*sizeof(uint16_t); /* vwv+buflen */
2211 if (length_needed
> smblen
) {
2214 vwv
= (const uint16_t *)(smb_buf
+ chain_offset
+ 1);
2217 * Now grab the new byte buffer....
2220 num_bytes
= SVAL(vwv
+wct
, 0);
2223 * .. and check that it fits.
2226 length_needed
+= num_bytes
;
2227 if (length_needed
> smblen
) {
2230 bytes
= (const uint8_t *)(vwv
+wct
+1);
2232 if (!fn(chain_cmd
, wct
, vwv
, num_bytes
, bytes
, private_data
)) {
2236 if (!is_andx_req(chain_cmd
)) {
2239 chain_cmd
= CVAL(vwv
, 0);
2244 static bool smb1_chain_length_cb(uint8_t cmd
,
2245 uint8_t wct
, const uint16_t *vwv
,
2246 uint16_t num_bytes
, const uint8_t *bytes
,
2249 unsigned *count
= (unsigned *)private_data
;
2254 unsigned smb1_chain_length(const uint8_t *buf
)
2258 if (!smb1_walk_chain(buf
, smb1_chain_length_cb
, &count
)) {
2264 struct smb1_parse_chain_state
{
2265 TALLOC_CTX
*mem_ctx
;
2267 struct smbd_server_connection
*sconn
;
2271 struct smb_request
**reqs
;
2275 static bool smb1_parse_chain_cb(uint8_t cmd
,
2276 uint8_t wct
, const uint16_t *vwv
,
2277 uint16_t num_bytes
, const uint8_t *bytes
,
2280 struct smb1_parse_chain_state
*state
=
2281 (struct smb1_parse_chain_state
*)private_data
;
2282 struct smb_request
**reqs
;
2283 struct smb_request
*req
;
2286 reqs
= talloc_realloc(state
->mem_ctx
, state
->reqs
,
2287 struct smb_request
*, state
->num_reqs
+1);
2293 req
= talloc(reqs
, struct smb_request
);
2298 ok
= init_smb_request(req
, state
->sconn
, state
->buf
, 0,
2299 state
->encrypted
, state
->seqnum
);
2306 req
->buflen
= num_bytes
;
2309 reqs
[state
->num_reqs
] = req
;
2310 state
->num_reqs
+= 1;
2314 bool smb1_parse_chain(TALLOC_CTX
*mem_ctx
, const uint8_t *buf
,
2315 struct smbd_server_connection
*sconn
,
2316 bool encrypted
, uint32_t seqnum
,
2317 struct smb_request
***reqs
, unsigned *num_reqs
)
2319 struct smb1_parse_chain_state state
;
2322 state
.mem_ctx
= mem_ctx
;
2324 state
.sconn
= sconn
;
2325 state
.encrypted
= encrypted
;
2326 state
.seqnum
= seqnum
;
2330 if (!smb1_walk_chain(buf
, smb1_parse_chain_cb
, &state
)) {
2331 TALLOC_FREE(state
.reqs
);
2334 for (i
=0; i
<state
.num_reqs
; i
++) {
2335 state
.reqs
[i
]->chain
= state
.reqs
;
2338 *num_reqs
= state
.num_reqs
;
2342 /****************************************************************************
2343 Check if services need reloading.
2344 ****************************************************************************/
2346 static void check_reload(struct smbd_server_connection
*sconn
, time_t t
)
2349 if (last_smb_conf_reload_time
== 0) {
2350 last_smb_conf_reload_time
= t
;
2353 if (t
>= last_smb_conf_reload_time
+SMBD_RELOAD_CHECK
) {
2354 reload_services(sconn
, conn_snum_used
, true);
2355 last_smb_conf_reload_time
= t
;
2359 static bool fd_is_readable(int fd
)
2363 ret
= poll_one_fd(fd
, POLLIN
|POLLHUP
, 0, &revents
);
2365 return ((ret
> 0) && ((revents
& (POLLIN
|POLLHUP
|POLLERR
)) != 0));
2369 static void smbd_server_connection_write_handler(
2370 struct smbd_server_connection
*sconn
)
2372 /* TODO: make write nonblocking */
2375 static void smbd_server_connection_read_handler(
2376 struct smbd_server_connection
*sconn
, int fd
)
2378 uint8_t *inbuf
= NULL
;
2379 size_t inbuf_len
= 0;
2380 size_t unread_bytes
= 0;
2381 bool encrypted
= false;
2382 TALLOC_CTX
*mem_ctx
= talloc_tos();
2388 if (lp_async_smb_echo_handler()
2389 && fd_is_readable(sconn
->smb1
.echo_handler
.trusted_fd
)) {
2391 * This is the super-ugly hack to prefer the packets
2392 * forwarded by the echo handler over the ones by the
2395 fd
= sconn
->smb1
.echo_handler
.trusted_fd
;
2398 from_client
= (sconn
->sock
== fd
);
2401 smbd_lock_socket(sconn
);
2403 if (!fd_is_readable(fd
)) {
2404 DEBUG(10,("the echo listener was faster\n"));
2405 smbd_unlock_socket(sconn
);
2410 /* TODO: make this completely nonblocking */
2411 status
= receive_smb_talloc(mem_ctx
, sconn
, fd
,
2412 (char **)(void *)&inbuf
,
2416 &inbuf_len
, &seqnum
,
2417 !from_client
/* trusted channel */);
2420 smbd_unlock_socket(sconn
);
2423 if (NT_STATUS_EQUAL(status
, NT_STATUS_RETRY
)) {
2426 if (NT_STATUS_IS_ERR(status
)) {
2427 exit_server_cleanly("failed to receive smb request");
2429 if (!NT_STATUS_IS_OK(status
)) {
2434 process_smb(sconn
, inbuf
, inbuf_len
, unread_bytes
,
2435 seqnum
, encrypted
, NULL
);
2438 static void smbd_server_connection_handler(struct tevent_context
*ev
,
2439 struct tevent_fd
*fde
,
2443 struct smbd_server_connection
*conn
= talloc_get_type(private_data
,
2444 struct smbd_server_connection
);
2446 if (flags
& TEVENT_FD_WRITE
) {
2447 smbd_server_connection_write_handler(conn
);
2450 if (flags
& TEVENT_FD_READ
) {
2451 smbd_server_connection_read_handler(conn
, conn
->sock
);
2456 static void smbd_server_echo_handler(struct tevent_context
*ev
,
2457 struct tevent_fd
*fde
,
2461 struct smbd_server_connection
*conn
= talloc_get_type(private_data
,
2462 struct smbd_server_connection
);
2464 if (flags
& TEVENT_FD_WRITE
) {
2465 smbd_server_connection_write_handler(conn
);
2468 if (flags
& TEVENT_FD_READ
) {
2469 smbd_server_connection_read_handler(
2470 conn
, conn
->smb1
.echo_handler
.trusted_fd
);
2475 #ifdef CLUSTER_SUPPORT
2477 struct smbd_release_ip_state
{
2478 struct smbd_server_connection
*sconn
;
2479 char addr
[INET6_ADDRSTRLEN
];
2482 /****************************************************************************
2483 received when we should release a specific IP
2484 ****************************************************************************/
2485 static void release_ip(const char *ip
, void *priv
)
2487 struct smbd_release_ip_state
*state
=
2488 talloc_get_type_abort(priv
,
2489 struct smbd_release_ip_state
);
2490 const char *addr
= state
->addr
;
2491 const char *p
= addr
;
2493 if (strncmp("::ffff:", addr
, 7) == 0) {
2497 DEBUG(10, ("Got release IP message for %s, "
2498 "our address is %s\n", ip
, p
));
2500 if ((strcmp(p
, ip
) == 0) || ((p
!= addr
) && strcmp(addr
, ip
) == 0)) {
2501 DEBUG(0,("Got release IP message for our IP %s - exiting immediately\n",
2504 * With SMB2 we should do a clean disconnect,
2505 * the previous_session_id in the session setup
2506 * will cleanup the old session, tcons and opens.
2508 * A clean disconnect is needed in order to support
2511 * Note: typically this is never triggered
2512 * as we got a TCP RST (triggered by ctdb event scripts)
2513 * before we get CTDB_SRVID_RELEASE_IP.
2515 * We used to call _exit(1) here, but as this was mostly never
2516 * triggered and has implication on our process model,
2517 * we can just use smbd_server_connection_terminate()
2520 smbd_server_connection_terminate(state
->sconn
,
2521 "CTDB_SRVID_RELEASE_IP");
2526 static NTSTATUS
smbd_register_ips(struct smbd_server_connection
*sconn
,
2527 struct sockaddr_storage
*srv
,
2528 struct sockaddr_storage
*clnt
)
2530 struct smbd_release_ip_state
*state
;
2531 struct ctdbd_connection
*cconn
;
2533 cconn
= messaging_ctdbd_connection();
2534 if (cconn
== NULL
) {
2535 return NT_STATUS_NO_MEMORY
;
2538 state
= talloc_zero(sconn
, struct smbd_release_ip_state
);
2539 if (state
== NULL
) {
2540 return NT_STATUS_NO_MEMORY
;
2542 state
->sconn
= sconn
;
2543 if (print_sockaddr(state
->addr
, sizeof(state
->addr
), srv
) == NULL
) {
2544 return NT_STATUS_NO_MEMORY
;
2547 return ctdbd_register_ips(cconn
, srv
, clnt
, release_ip
, state
);
2550 static int client_get_tcp_info(int sock
, struct sockaddr_storage
*server
,
2551 struct sockaddr_storage
*client
)
2554 length
= sizeof(*server
);
2555 if (getsockname(sock
, (struct sockaddr
*)server
, &length
) != 0) {
2558 length
= sizeof(*client
);
2559 if (getpeername(sock
, (struct sockaddr
*)client
, &length
) != 0) {
2567 * Send keepalive packets to our client
2569 static bool keepalive_fn(const struct timeval
*now
, void *private_data
)
2571 struct smbd_server_connection
*sconn
= talloc_get_type_abort(
2572 private_data
, struct smbd_server_connection
);
2575 if (sconn
->using_smb2
) {
2576 /* Don't do keepalives on an SMB2 connection. */
2580 smbd_lock_socket(sconn
);
2581 ret
= send_keepalive(sconn
->sock
);
2582 smbd_unlock_socket(sconn
);
2585 char addr
[INET6_ADDRSTRLEN
];
2587 * Try and give an error message saying what
2590 DEBUG(0, ("send_keepalive failed for client %s. "
2591 "Error %s - exiting\n",
2592 get_peer_addr(sconn
->sock
, addr
, sizeof(addr
)),
2600 * Do the recurring check if we're idle
2602 static bool deadtime_fn(const struct timeval
*now
, void *private_data
)
2604 struct smbd_server_connection
*sconn
=
2605 (struct smbd_server_connection
*)private_data
;
2607 if ((conn_num_open(sconn
) == 0)
2608 || (conn_idle_all(sconn
, now
->tv_sec
))) {
2609 DEBUG( 2, ( "Closing idle connection\n" ) );
2610 messaging_send(sconn
->msg_ctx
,
2611 messaging_server_id(sconn
->msg_ctx
),
2612 MSG_SHUTDOWN
, &data_blob_null
);
2620 * Do the recurring log file and smb.conf reload checks.
2623 static bool housekeeping_fn(const struct timeval
*now
, void *private_data
)
2625 struct smbd_server_connection
*sconn
= talloc_get_type_abort(
2626 private_data
, struct smbd_server_connection
);
2628 DEBUG(5, ("housekeeping\n"));
2630 change_to_root_user();
2632 /* update printer queue caches if necessary */
2633 update_monitored_printq_cache(sconn
->msg_ctx
);
2635 /* check if we need to reload services */
2636 check_reload(sconn
, time_mono(NULL
));
2639 * Force a log file check.
2641 force_check_log_size();
2647 * Read an smb packet in the echo handler child, giving the parent
2648 * smbd one second to react once the socket becomes readable.
2651 struct smbd_echo_read_state
{
2652 struct tevent_context
*ev
;
2653 struct smbd_server_connection
*sconn
;
2660 static void smbd_echo_read_readable(struct tevent_req
*subreq
);
2661 static void smbd_echo_read_waited(struct tevent_req
*subreq
);
2663 static struct tevent_req
*smbd_echo_read_send(
2664 TALLOC_CTX
*mem_ctx
, struct tevent_context
*ev
,
2665 struct smbd_server_connection
*sconn
)
2667 struct tevent_req
*req
, *subreq
;
2668 struct smbd_echo_read_state
*state
;
2670 req
= tevent_req_create(mem_ctx
, &state
,
2671 struct smbd_echo_read_state
);
2676 state
->sconn
= sconn
;
2678 subreq
= wait_for_read_send(state
, ev
, sconn
->sock
);
2679 if (tevent_req_nomem(subreq
, req
)) {
2680 return tevent_req_post(req
, ev
);
2682 tevent_req_set_callback(subreq
, smbd_echo_read_readable
, req
);
2686 static void smbd_echo_read_readable(struct tevent_req
*subreq
)
2688 struct tevent_req
*req
= tevent_req_callback_data(
2689 subreq
, struct tevent_req
);
2690 struct smbd_echo_read_state
*state
= tevent_req_data(
2691 req
, struct smbd_echo_read_state
);
2695 ok
= wait_for_read_recv(subreq
, &err
);
2696 TALLOC_FREE(subreq
);
2698 tevent_req_nterror(req
, map_nt_error_from_unix(err
));
2703 * Give the parent smbd one second to step in
2706 subreq
= tevent_wakeup_send(
2707 state
, state
->ev
, timeval_current_ofs(1, 0));
2708 if (tevent_req_nomem(subreq
, req
)) {
2711 tevent_req_set_callback(subreq
, smbd_echo_read_waited
, req
);
2714 static void smbd_echo_read_waited(struct tevent_req
*subreq
)
2716 struct tevent_req
*req
= tevent_req_callback_data(
2717 subreq
, struct tevent_req
);
2718 struct smbd_echo_read_state
*state
= tevent_req_data(
2719 req
, struct smbd_echo_read_state
);
2720 struct smbd_server_connection
*sconn
= state
->sconn
;
2726 ok
= tevent_wakeup_recv(subreq
);
2727 TALLOC_FREE(subreq
);
2729 tevent_req_nterror(req
, NT_STATUS_INTERNAL_ERROR
);
2733 ok
= smbd_lock_socket_internal(sconn
);
2735 tevent_req_nterror(req
, map_nt_error_from_unix(errno
));
2736 DEBUG(0, ("%s: failed to lock socket\n", __location__
));
2740 if (!fd_is_readable(sconn
->sock
)) {
2741 DEBUG(10,("echo_handler[%d] the parent smbd was faster\n",
2744 ok
= smbd_unlock_socket_internal(sconn
);
2746 tevent_req_nterror(req
, map_nt_error_from_unix(errno
));
2747 DEBUG(1, ("%s: failed to unlock socket\n",
2752 subreq
= wait_for_read_send(state
, state
->ev
, sconn
->sock
);
2753 if (tevent_req_nomem(subreq
, req
)) {
2756 tevent_req_set_callback(subreq
, smbd_echo_read_readable
, req
);
2760 status
= receive_smb_talloc(state
, sconn
, sconn
->sock
, &state
->buf
,
2766 false /* trusted_channel*/);
2768 if (tevent_req_nterror(req
, status
)) {
2769 tevent_req_nterror(req
, status
);
2770 DEBUG(1, ("echo_handler[%d]: receive_smb_raw_talloc failed: %s\n",
2771 (int)getpid(), nt_errstr(status
)));
2775 ok
= smbd_unlock_socket_internal(sconn
);
2777 tevent_req_nterror(req
, map_nt_error_from_unix(errno
));
2778 DEBUG(1, ("%s: failed to unlock socket\n", __location__
));
2781 tevent_req_done(req
);
2784 static NTSTATUS
smbd_echo_read_recv(struct tevent_req
*req
, TALLOC_CTX
*mem_ctx
,
2785 char **pbuf
, size_t *pbuflen
, uint32_t *pseqnum
)
2787 struct smbd_echo_read_state
*state
= tevent_req_data(
2788 req
, struct smbd_echo_read_state
);
2791 if (tevent_req_is_nterror(req
, &status
)) {
2794 *pbuf
= talloc_move(mem_ctx
, &state
->buf
);
2795 *pbuflen
= state
->buflen
;
2796 *pseqnum
= state
->seqnum
;
2797 return NT_STATUS_OK
;
2800 struct smbd_echo_state
{
2801 struct tevent_context
*ev
;
2802 struct iovec
*pending
;
2803 struct smbd_server_connection
*sconn
;
2806 struct tevent_fd
*parent_fde
;
2808 struct tevent_req
*write_req
;
2811 static void smbd_echo_writer_done(struct tevent_req
*req
);
2813 static void smbd_echo_activate_writer(struct smbd_echo_state
*state
)
2817 if (state
->write_req
!= NULL
) {
2821 num_pending
= talloc_array_length(state
->pending
);
2822 if (num_pending
== 0) {
2826 state
->write_req
= writev_send(state
, state
->ev
, NULL
,
2827 state
->parent_pipe
, false,
2828 state
->pending
, num_pending
);
2829 if (state
->write_req
== NULL
) {
2830 DEBUG(1, ("writev_send failed\n"));
2834 talloc_steal(state
->write_req
, state
->pending
);
2835 state
->pending
= NULL
;
2837 tevent_req_set_callback(state
->write_req
, smbd_echo_writer_done
,
2841 static void smbd_echo_writer_done(struct tevent_req
*req
)
2843 struct smbd_echo_state
*state
= tevent_req_callback_data(
2844 req
, struct smbd_echo_state
);
2848 written
= writev_recv(req
, &err
);
2850 state
->write_req
= NULL
;
2851 if (written
== -1) {
2852 DEBUG(1, ("writev to parent failed: %s\n", strerror(err
)));
2855 DEBUG(10,("echo_handler[%d]: forwarded pdu to main\n", (int)getpid()));
2856 smbd_echo_activate_writer(state
);
2859 static bool smbd_echo_reply(struct smbd_echo_state
*state
,
2860 uint8_t *inbuf
, size_t inbuf_len
,
2863 struct smb_request req
;
2864 uint16_t num_replies
;
2868 if ((inbuf_len
== 4) && (CVAL(inbuf
, 0) == NBSSkeepalive
)) {
2869 DEBUG(10, ("Got netbios keepalive\n"));
2876 if (inbuf_len
< smb_size
) {
2877 DEBUG(10, ("Got short packet: %d bytes\n", (int)inbuf_len
));
2880 if (!valid_smb_header(state
->sconn
, inbuf
)) {
2881 DEBUG(10, ("Got invalid SMB header\n"));
2885 if (!init_smb_request(&req
, state
->sconn
, inbuf
, 0, false,
2891 DEBUG(10, ("smbecho handler got cmd %d (%s)\n", (int)req
.cmd
,
2892 smb_messages
[req
.cmd
].name
2893 ? smb_messages
[req
.cmd
].name
: "unknown"));
2895 if (req
.cmd
!= SMBecho
) {
2902 num_replies
= SVAL(req
.vwv
+0, 0);
2903 if (num_replies
!= 1) {
2904 /* Not a Windows "Hey, you're still there?" request */
2908 if (!create_outbuf(talloc_tos(), &req
, (const char *)req
.inbuf
, &outbuf
,
2910 DEBUG(10, ("create_outbuf failed\n"));
2913 req
.outbuf
= (uint8_t *)outbuf
;
2915 SSVAL(req
.outbuf
, smb_vwv0
, num_replies
);
2917 if (req
.buflen
> 0) {
2918 memcpy(smb_buf(req
.outbuf
), req
.buf
, req
.buflen
);
2921 ok
= srv_send_smb(req
.sconn
,
2925 TALLOC_FREE(outbuf
);
2933 static void smbd_echo_exit(struct tevent_context
*ev
,
2934 struct tevent_fd
*fde
, uint16_t flags
,
2937 DEBUG(2, ("smbd_echo_exit: lost connection to parent\n"));
2941 static void smbd_echo_got_packet(struct tevent_req
*req
);
2943 static void smbd_echo_loop(struct smbd_server_connection
*sconn
,
2946 struct smbd_echo_state
*state
;
2947 struct tevent_req
*read_req
;
2949 state
= talloc_zero(sconn
, struct smbd_echo_state
);
2950 if (state
== NULL
) {
2951 DEBUG(1, ("talloc failed\n"));
2954 state
->sconn
= sconn
;
2955 state
->parent_pipe
= parent_pipe
;
2956 state
->ev
= s3_tevent_context_init(state
);
2957 if (state
->ev
== NULL
) {
2958 DEBUG(1, ("tevent_context_init failed\n"));
2962 state
->parent_fde
= tevent_add_fd(state
->ev
, state
, parent_pipe
,
2963 TEVENT_FD_READ
, smbd_echo_exit
,
2965 if (state
->parent_fde
== NULL
) {
2966 DEBUG(1, ("tevent_add_fd failed\n"));
2971 read_req
= smbd_echo_read_send(state
, state
->ev
, sconn
);
2972 if (read_req
== NULL
) {
2973 DEBUG(1, ("smbd_echo_read_send failed\n"));
2977 tevent_req_set_callback(read_req
, smbd_echo_got_packet
, state
);
2980 if (tevent_loop_once(state
->ev
) == -1) {
2981 DEBUG(1, ("tevent_loop_once failed: %s\n",
2989 static void smbd_echo_got_packet(struct tevent_req
*req
)
2991 struct smbd_echo_state
*state
= tevent_req_callback_data(
2992 req
, struct smbd_echo_state
);
2996 uint32_t seqnum
= 0;
2999 status
= smbd_echo_read_recv(req
, state
, &buf
, &buflen
, &seqnum
);
3001 if (!NT_STATUS_IS_OK(status
)) {
3002 DEBUG(1, ("smbd_echo_read_recv returned %s\n",
3003 nt_errstr(status
)));
3007 reply
= smbd_echo_reply(state
, (uint8_t *)buf
, buflen
, seqnum
);
3013 num_pending
= talloc_array_length(state
->pending
);
3014 tmp
= talloc_realloc(state
, state
->pending
, struct iovec
,
3017 DEBUG(1, ("talloc_realloc failed\n"));
3020 state
->pending
= tmp
;
3022 if (buflen
>= smb_size
) {
3024 * place the seqnum in the packet so that the main process
3025 * can reply with signing
3027 SIVAL(buf
, smb_ss_field
, seqnum
);
3028 SIVAL(buf
, smb_ss_field
+4, NT_STATUS_V(NT_STATUS_OK
));
3031 iov
= &state
->pending
[num_pending
];
3032 iov
->iov_base
= talloc_move(state
->pending
, &buf
);
3033 iov
->iov_len
= buflen
;
3035 DEBUG(10,("echo_handler[%d]: forward to main\n",
3037 smbd_echo_activate_writer(state
);
3040 req
= smbd_echo_read_send(state
, state
->ev
, state
->sconn
);
3042 DEBUG(1, ("smbd_echo_read_send failed\n"));
3045 tevent_req_set_callback(req
, smbd_echo_got_packet
, state
);
3050 * Handle SMBecho requests in a forked child process
3052 bool fork_echo_handler(struct smbd_server_connection
*sconn
)
3054 int listener_pipe
[2];
3058 res
= pipe(listener_pipe
);
3060 DEBUG(1, ("pipe() failed: %s\n", strerror(errno
)));
3063 sconn
->smb1
.echo_handler
.socket_lock_fd
= create_unlink_tmp(lp_lockdir());
3064 if (sconn
->smb1
.echo_handler
.socket_lock_fd
== -1) {
3065 DEBUG(1, ("Could not create lock fd: %s\n", strerror(errno
)));
3073 close(listener_pipe
[0]);
3074 set_blocking(listener_pipe
[1], false);
3076 status
= reinit_after_fork(sconn
->msg_ctx
,
3079 if (!NT_STATUS_IS_OK(status
)) {
3080 DEBUG(1, ("reinit_after_fork failed: %s\n",
3081 nt_errstr(status
)));
3084 smbd_echo_loop(sconn
, listener_pipe
[1]);
3087 close(listener_pipe
[1]);
3088 listener_pipe
[1] = -1;
3089 sconn
->smb1
.echo_handler
.trusted_fd
= listener_pipe
[0];
3091 DEBUG(10,("fork_echo_handler: main[%d] echo_child[%d]\n", (int)getpid(), (int)child
));
3094 * Without smb signing this is the same as the normal smbd
3095 * listener. This needs to change once signing comes in.
3097 sconn
->smb1
.echo_handler
.trusted_fde
= tevent_add_fd(sconn
->ev_ctx
,
3099 sconn
->smb1
.echo_handler
.trusted_fd
,
3101 smbd_server_echo_handler
,
3103 if (sconn
->smb1
.echo_handler
.trusted_fde
== NULL
) {
3104 DEBUG(1, ("event_add_fd failed\n"));
3111 if (listener_pipe
[0] != -1) {
3112 close(listener_pipe
[0]);
3114 if (listener_pipe
[1] != -1) {
3115 close(listener_pipe
[1]);
3117 sconn
->smb1
.echo_handler
.trusted_fd
= -1;
3118 if (sconn
->smb1
.echo_handler
.socket_lock_fd
!= -1) {
3119 close(sconn
->smb1
.echo_handler
.socket_lock_fd
);
3121 sconn
->smb1
.echo_handler
.trusted_fd
= -1;
3122 sconn
->smb1
.echo_handler
.socket_lock_fd
= -1;
3126 static bool uid_in_use(const struct user_struct
*user
, uid_t uid
)
3129 if (user
->session_info
&&
3130 (user
->session_info
->unix_token
->uid
== uid
)) {
3138 static bool gid_in_use(const struct user_struct
*user
, gid_t gid
)
3141 if (user
->session_info
!= NULL
) {
3143 struct security_unix_token
*utok
;
3145 utok
= user
->session_info
->unix_token
;
3146 if (utok
->gid
== gid
) {
3149 for(i
=0; i
<utok
->ngroups
; i
++) {
3150 if (utok
->groups
[i
] == gid
) {
3160 static bool sid_in_use(const struct user_struct
*user
,
3161 const struct dom_sid
*psid
)
3164 struct security_token
*tok
;
3166 if (user
->session_info
== NULL
) {
3169 tok
= user
->session_info
->security_token
;
3172 * Not sure session_info->security_token can
3173 * ever be NULL. This check might be not
3178 if (security_token_has_sid(tok
, psid
)) {
3186 static bool id_in_use(const struct user_struct
*user
,
3187 const struct id_cache_ref
*id
)
3191 return uid_in_use(user
, id
->id
.uid
);
3193 return gid_in_use(user
, id
->id
.gid
);
3195 return sid_in_use(user
, &id
->id
.sid
);
3202 static void smbd_id_cache_kill(struct messaging_context
*msg_ctx
,
3205 struct server_id server_id
,
3208 const char *msg
= (data
&& data
->data
)
3209 ? (const char *)data
->data
: "<NULL>";
3210 struct id_cache_ref id
;
3211 struct smbd_server_connection
*sconn
=
3212 talloc_get_type_abort(private_data
,
3213 struct smbd_server_connection
);
3215 if (!id_cache_ref_parse(msg
, &id
)) {
3216 DEBUG(0, ("Invalid ?ID: %s\n", msg
));
3220 if (id_in_use(sconn
->users
, &id
)) {
3221 exit_server_cleanly(msg
);
3223 id_cache_delete_from_cache(&id
);
3226 NTSTATUS
smbXsrv_connection_init_tables(struct smbXsrv_connection
*conn
,
3227 enum protocol_types protocol
)
3231 set_Protocol(protocol
);
3232 conn
->protocol
= protocol
;
3234 if (protocol
>= PROTOCOL_SMB2_02
) {
3235 status
= smb2srv_session_table_init(conn
);
3236 if (!NT_STATUS_IS_OK(status
)) {
3240 status
= smb2srv_open_table_init(conn
);
3241 if (!NT_STATUS_IS_OK(status
)) {
3245 status
= smb1srv_session_table_init(conn
);
3246 if (!NT_STATUS_IS_OK(status
)) {
3250 status
= smb1srv_tcon_table_init(conn
);
3251 if (!NT_STATUS_IS_OK(status
)) {
3255 status
= smb1srv_open_table_init(conn
);
3256 if (!NT_STATUS_IS_OK(status
)) {
3261 return NT_STATUS_OK
;
3264 static void smbd_tevent_trace_callback(enum tevent_trace_point point
,
3267 struct smbXsrv_connection
*conn
=
3268 talloc_get_type_abort(private_data
,
3269 struct smbXsrv_connection
);
3272 case TEVENT_TRACE_BEFORE_WAIT
:
3274 * This just removes compiler warning
3275 * without profile support
3277 conn
->smbd_idle_profstamp
= 0;
3278 START_PROFILE_STAMP(smbd_idle
, conn
->smbd_idle_profstamp
);
3280 case TEVENT_TRACE_AFTER_WAIT
:
3281 END_PROFILE_STAMP(smbd_idle
, conn
->smbd_idle_profstamp
);
3286 /****************************************************************************
3287 Process commands from the client
3288 ****************************************************************************/
3290 void smbd_process(struct tevent_context
*ev_ctx
,
3291 struct messaging_context
*msg_ctx
,
3295 TALLOC_CTX
*frame
= talloc_stackframe();
3296 struct smbXsrv_connection
*conn
;
3297 struct smbd_server_connection
*sconn
;
3298 struct sockaddr_storage ss
;
3299 struct sockaddr
*sa
= NULL
;
3300 socklen_t sa_socklen
;
3301 struct tsocket_address
*local_address
= NULL
;
3302 struct tsocket_address
*remote_address
= NULL
;
3303 const char *locaddr
= NULL
;
3304 const char *remaddr
= NULL
;
3308 conn
= talloc_zero(ev_ctx
, struct smbXsrv_connection
);
3310 DEBUG(0,("talloc_zero(struct smbXsrv_connection)\n"));
3311 exit_server_cleanly("talloc_zero(struct smbXsrv_connection).\n");
3314 conn
->ev_ctx
= ev_ctx
;
3315 conn
->msg_ctx
= msg_ctx
;
3317 sconn
= talloc_zero(conn
, struct smbd_server_connection
);
3319 exit_server("failed to create smbd_server_connection");
3322 conn
->sconn
= sconn
;
3326 * TODO: remove this...:-)
3328 global_smbXsrv_connection
= conn
;
3330 sconn
->ev_ctx
= ev_ctx
;
3331 sconn
->msg_ctx
= msg_ctx
;
3332 sconn
->sock
= sock_fd
;
3333 sconn
->smb1
.echo_handler
.trusted_fd
= -1;
3334 sconn
->smb1
.echo_handler
.socket_lock_fd
= -1;
3337 smbd_setup_sig_term_handler(sconn
);
3338 smbd_setup_sig_hup_handler(sconn
);
3340 if (!serverid_register(messaging_server_id(msg_ctx
),
3341 FLAG_MSG_GENERAL
|FLAG_MSG_SMBD
3343 |FLAG_MSG_PRINT_GENERAL
)) {
3344 exit_server_cleanly("Could not register myself in "
3349 if (lp_srv_maxprotocol() >= PROTOCOL_SMB2_02
) {
3351 * We're not making the decision here,
3352 * we're just allowing the client
3353 * to decide between SMB1 and SMB2
3354 * with the first negprot
3357 sconn
->using_smb2
= true;
3360 /* Ensure child is set to blocking mode */
3361 set_blocking(sconn
->sock
,True
);
3363 set_socket_options(sconn
->sock
, "SO_KEEPALIVE");
3364 set_socket_options(sconn
->sock
, lp_socket_options());
3366 sa
= (struct sockaddr
*)(void *)&ss
;
3367 sa_socklen
= sizeof(ss
);
3368 ret
= getpeername(sconn
->sock
, sa
, &sa_socklen
);
3370 int level
= (errno
== ENOTCONN
)?2:0;
3371 DEBUG(level
,("getpeername() failed - %s\n", strerror(errno
)));
3372 exit_server_cleanly("getpeername() failed.\n");
3374 ret
= tsocket_address_bsd_from_sockaddr(sconn
,
3378 DEBUG(0,("%s: tsocket_address_bsd_from_sockaddr remote failed - %s\n",
3379 __location__
, strerror(errno
)));
3380 exit_server_cleanly("tsocket_address_bsd_from_sockaddr remote failed.\n");
3383 sa
= (struct sockaddr
*)(void *)&ss
;
3384 sa_socklen
= sizeof(ss
);
3385 ret
= getsockname(sconn
->sock
, sa
, &sa_socklen
);
3387 int level
= (errno
== ENOTCONN
)?2:0;
3388 DEBUG(level
,("getsockname() failed - %s\n", strerror(errno
)));
3389 exit_server_cleanly("getsockname() failed.\n");
3391 ret
= tsocket_address_bsd_from_sockaddr(sconn
,
3395 DEBUG(0,("%s: tsocket_address_bsd_from_sockaddr remote failed - %s\n",
3396 __location__
, strerror(errno
)));
3397 exit_server_cleanly("tsocket_address_bsd_from_sockaddr remote failed.\n");
3400 sconn
->local_address
= local_address
;
3401 sconn
->remote_address
= remote_address
;
3403 if (tsocket_address_is_inet(local_address
, "ip")) {
3404 locaddr
= tsocket_address_inet_addr_string(
3405 sconn
->local_address
,
3407 if (locaddr
== NULL
) {
3408 DEBUG(0,("%s: tsocket_address_inet_addr_string local failed - %s\n",
3409 __location__
, strerror(errno
)));
3410 exit_server_cleanly("tsocket_address_inet_addr_string local failed.\n");
3413 locaddr
= "0.0.0.0";
3416 if (tsocket_address_is_inet(remote_address
, "ip")) {
3417 remaddr
= tsocket_address_inet_addr_string(
3418 sconn
->remote_address
,
3420 if (remaddr
== NULL
) {
3421 DEBUG(0,("%s: tsocket_address_inet_addr_string remote failed - %s\n",
3422 __location__
, strerror(errno
)));
3423 exit_server_cleanly("tsocket_address_inet_addr_string remote failed.\n");
3426 remaddr
= "0.0.0.0";
3429 /* this is needed so that we get decent entries
3430 in smbstatus for port 445 connects */
3431 set_remote_machine_name(remaddr
, false);
3432 reload_services(sconn
, conn_snum_used
, true);
3435 * Before the first packet, check the global hosts allow/ hosts deny
3436 * parameters before doing any parsing of packets passed to us by the
3437 * client. This prevents attacks on our parsing code from hosts not in
3438 * the hosts allow list.
3441 ret
= get_remote_hostname(remote_address
,
3445 DEBUG(0,("%s: get_remote_hostname failed - %s\n",
3446 __location__
, strerror(errno
)));
3447 exit_server_cleanly("get_remote_hostname failed.\n");
3449 if (strequal(rhost
, "UNKNOWN")) {
3450 rhost
= talloc_strdup(talloc_tos(), remaddr
);
3452 sconn
->remote_hostname
= talloc_move(sconn
, &rhost
);
3454 sub_set_socket_ids(remaddr
,
3455 sconn
->remote_hostname
,
3458 if (!allow_access(lp_hostsdeny(-1), lp_hostsallow(-1),
3459 sconn
->remote_hostname
,
3462 * send a negative session response "not listening on calling
3465 unsigned char buf
[5] = {0x83, 0, 0, 1, 0x81};
3466 DEBUG( 1, ("Connection denied from %s to %s\n",
3467 tsocket_address_string(remote_address
, talloc_tos()),
3468 tsocket_address_string(local_address
, talloc_tos())));
3469 (void)srv_send_smb(sconn
,(char *)buf
, false,
3471 exit_server_cleanly("connection denied");
3474 DEBUG(10, ("Connection allowed from %s to %s\n",
3475 tsocket_address_string(remote_address
, talloc_tos()),
3476 tsocket_address_string(local_address
, talloc_tos())));
3478 if (lp_preload_modules()) {
3479 smb_load_modules(lp_preload_modules());
3482 smb_perfcount_init();
3484 if (!init_account_policy()) {
3485 exit_server("Could not open account policy tdb.\n");
3488 if (*lp_rootdir(talloc_tos())) {
3489 if (chroot(lp_rootdir(talloc_tos())) != 0) {
3490 DEBUG(0,("Failed to change root to %s\n",
3491 lp_rootdir(talloc_tos())));
3492 exit_server("Failed to chroot()");
3494 if (chdir("/") == -1) {
3495 DEBUG(0,("Failed to chdir to / on chroot to %s\n", lp_rootdir(talloc_tos())));
3496 exit_server("Failed to chroot()");
3498 DEBUG(0,("Changed root to %s\n", lp_rootdir(talloc_tos())));
3501 if (!srv_init_signing(sconn
)) {
3502 exit_server("Failed to init smb_signing");
3505 if (!file_init(sconn
)) {
3506 exit_server("file_init() failed");
3510 if (!init_oplocks(sconn
))
3511 exit_server("Failed to init oplocks");
3513 /* register our message handlers */
3514 messaging_register(sconn
->msg_ctx
, sconn
,
3515 MSG_SMB_FORCE_TDIS
, msg_force_tdis
);
3516 messaging_register(sconn
->msg_ctx
, sconn
,
3517 MSG_SMB_CLOSE_FILE
, msg_close_file
);
3518 messaging_register(sconn
->msg_ctx
, sconn
,
3519 MSG_SMB_FILE_RENAME
, msg_file_was_renamed
);
3521 id_cache_register_msgs(sconn
->msg_ctx
);
3522 messaging_deregister(sconn
->msg_ctx
, ID_CACHE_KILL
, NULL
);
3523 messaging_register(sconn
->msg_ctx
, sconn
,
3524 ID_CACHE_KILL
, smbd_id_cache_kill
);
3526 messaging_deregister(sconn
->msg_ctx
,
3527 MSG_SMB_CONF_UPDATED
, sconn
->ev_ctx
);
3528 messaging_register(sconn
->msg_ctx
, sconn
,
3529 MSG_SMB_CONF_UPDATED
, smbd_conf_updated
);
3532 * Use the default MSG_DEBUG handler to avoid rebroadcasting
3533 * MSGs to all child processes
3535 messaging_deregister(sconn
->msg_ctx
,
3537 messaging_register(sconn
->msg_ctx
, NULL
,
3538 MSG_DEBUG
, debug_message
);
3540 if ((lp_keepalive() != 0)
3541 && !(event_add_idle(ev_ctx
, NULL
,
3542 timeval_set(lp_keepalive(), 0),
3543 "keepalive", keepalive_fn
,
3545 DEBUG(0, ("Could not add keepalive event\n"));
3549 if (!(event_add_idle(ev_ctx
, NULL
,
3550 timeval_set(IDLE_CLOSED_TIMEOUT
, 0),
3551 "deadtime", deadtime_fn
, sconn
))) {
3552 DEBUG(0, ("Could not add deadtime event\n"));
3556 if (!(event_add_idle(ev_ctx
, NULL
,
3557 timeval_set(SMBD_HOUSEKEEPING_INTERVAL
, 0),
3558 "housekeeping", housekeeping_fn
, sconn
))) {
3559 DEBUG(0, ("Could not add housekeeping event\n"));
3563 #ifdef CLUSTER_SUPPORT
3565 if (lp_clustering()) {
3567 * We need to tell ctdb about our client's TCP
3568 * connection, so that for failover ctdbd can send
3569 * tickle acks, triggering a reconnection by the
3573 struct sockaddr_storage srv
, clnt
;
3575 if (client_get_tcp_info(sconn
->sock
, &srv
, &clnt
) == 0) {
3577 status
= smbd_register_ips(sconn
, &srv
, &clnt
);
3578 if (!NT_STATUS_IS_OK(status
)) {
3579 DEBUG(0, ("ctdbd_register_ips failed: %s\n",
3580 nt_errstr(status
)));
3583 int level
= (errno
== ENOTCONN
)?2:0;
3584 DEBUG(level
,("Unable to get tcp info for "
3585 "smbd_register_ips: %s\n",
3587 exit_server_cleanly("client_get_tcp_info() failed.\n");
3593 sconn
->nbt
.got_session
= false;
3595 sconn
->smb1
.negprot
.max_recv
= MIN(lp_max_xmit(),BUFFER_SIZE
);
3597 sconn
->smb1
.sessions
.done_sesssetup
= false;
3598 sconn
->smb1
.sessions
.max_send
= BUFFER_SIZE
;
3600 if (!init_dptrs(sconn
)) {
3601 exit_server("init_dptrs() failed");
3604 sconn
->smb1
.fde
= tevent_add_fd(ev_ctx
,
3608 smbd_server_connection_handler
,
3610 if (!sconn
->smb1
.fde
) {
3611 exit_server("failed to create smbd_server_connection fde");
3614 sconn
->conn
->local_address
= sconn
->local_address
;
3615 sconn
->conn
->remote_address
= sconn
->remote_address
;
3616 sconn
->conn
->remote_hostname
= sconn
->remote_hostname
;
3617 sconn
->conn
->protocol
= PROTOCOL_NONE
;
3621 tevent_set_trace_callback(ev_ctx
, smbd_tevent_trace_callback
, conn
);
3624 frame
= talloc_stackframe_pool(8192);
3627 if (tevent_loop_once(ev_ctx
) == -1) {
3628 if (errno
!= EINTR
) {
3629 DEBUG(3, ("tevent_loop_once failed: %s,"
3630 " exiting\n", strerror(errno
) ));
3638 exit_server_cleanly(NULL
);
3641 bool req_is_in_chain(const struct smb_request
*req
)
3643 if (req
->vwv
!= (const uint16_t *)(req
->inbuf
+smb_vwv
)) {
3645 * We're right now handling a subsequent request, so we must
3651 if (!is_andx_req(req
->cmd
)) {
3657 * Okay, an illegal request, but definitely not chained :-)
3662 return (CVAL(req
->vwv
+0, 0) != 0xFF);