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 extern bool global_machine_password_needs_changing
;
46 /* Internal message queue for deferred opens. */
47 struct pending_message_list
{
48 struct pending_message_list
*next
, *prev
;
49 struct timeval request_time
; /* When was this first issued? */
50 struct smbd_server_connection
*sconn
;
51 struct timed_event
*te
;
52 struct smb_perfcount_data pcd
;
57 DATA_BLOB private_data
;
60 static void construct_reply_common(struct smb_request
*req
, const char *inbuf
,
62 static struct pending_message_list
*get_deferred_open_message_smb(
63 struct smbd_server_connection
*sconn
, uint64_t mid
);
64 static bool smb_splice_chain(uint8_t **poutbuf
, const uint8_t *andx_buf
);
66 static bool smbd_lock_socket_internal(struct smbd_server_connection
*sconn
)
70 if (sconn
->smb1
.echo_handler
.socket_lock_fd
== -1) {
74 sconn
->smb1
.echo_handler
.ref_count
++;
76 if (sconn
->smb1
.echo_handler
.ref_count
> 1) {
80 DEBUG(10,("pid[%d] wait for socket lock\n", (int)getpid()));
84 sconn
->smb1
.echo_handler
.socket_lock_fd
,
85 F_SETLKW
, 0, 0, F_WRLCK
);
86 } while (!ok
&& (errno
== EINTR
));
89 DEBUG(1, ("fcntl_lock failed: %s\n", strerror(errno
)));
93 DEBUG(10,("pid[%d] got for socket lock\n", (int)getpid()));
98 void smbd_lock_socket(struct smbd_server_connection
*sconn
)
100 if (!smbd_lock_socket_internal(sconn
)) {
101 exit_server_cleanly("failed to lock socket");
105 static bool smbd_unlock_socket_internal(struct smbd_server_connection
*sconn
)
109 if (sconn
->smb1
.echo_handler
.socket_lock_fd
== -1) {
113 sconn
->smb1
.echo_handler
.ref_count
--;
115 if (sconn
->smb1
.echo_handler
.ref_count
> 0) {
121 sconn
->smb1
.echo_handler
.socket_lock_fd
,
122 F_SETLKW
, 0, 0, F_UNLCK
);
123 } while (!ok
&& (errno
== EINTR
));
126 DEBUG(1, ("fcntl_lock failed: %s\n", strerror(errno
)));
130 DEBUG(10,("pid[%d] unlocked socket\n", (int)getpid()));
135 void smbd_unlock_socket(struct smbd_server_connection
*sconn
)
137 if (!smbd_unlock_socket_internal(sconn
)) {
138 exit_server_cleanly("failed to unlock socket");
142 /* Accessor function for smb_read_error for smbd functions. */
144 /****************************************************************************
146 ****************************************************************************/
148 bool srv_send_smb(struct smbd_server_connection
*sconn
, char *buffer
,
149 bool do_signing
, uint32_t seqnum
,
151 struct smb_perfcount_data
*pcd
)
156 char *buf_out
= buffer
;
158 smbd_lock_socket(sconn
);
161 /* Sign the outgoing packet if required. */
162 srv_calculate_sign_mac(sconn
, buf_out
, seqnum
);
166 NTSTATUS status
= srv_encrypt_buffer(sconn
, buffer
, &buf_out
);
167 if (!NT_STATUS_IS_OK(status
)) {
168 DEBUG(0, ("send_smb: SMB encryption failed "
169 "on outgoing packet! Error %s\n",
170 nt_errstr(status
) ));
175 len
= smb_len(buf_out
) + 4;
177 ret
= write_data(sconn
->sock
, buf_out
+nwritten
, len
- nwritten
);
180 char addr
[INET6_ADDRSTRLEN
];
182 * Try and give an error message saying what
185 DEBUG(1,("pid[%d] Error writing %d bytes to client %s. %d. (%s)\n",
186 (int)getpid(), (int)len
,
187 get_peer_addr(sconn
->sock
, addr
, sizeof(addr
)),
188 (int)ret
, strerror(errno
) ));
190 srv_free_enc_buffer(sconn
, buf_out
);
194 SMB_PERFCOUNT_SET_MSGLEN_OUT(pcd
, len
);
195 srv_free_enc_buffer(sconn
, buf_out
);
197 SMB_PERFCOUNT_END(pcd
);
199 smbd_unlock_socket(sconn
);
203 /*******************************************************************
204 Setup the word count and byte count for a smb message.
205 ********************************************************************/
207 int srv_set_message(char *buf
,
212 if (zero
&& (num_words
|| num_bytes
)) {
213 memset(buf
+ smb_size
,'\0',num_words
*2 + num_bytes
);
215 SCVAL(buf
,smb_wct
,num_words
);
216 SSVAL(buf
,smb_vwv
+ num_words
*SIZEOFWORD
,num_bytes
);
217 smb_setlen(buf
,(smb_size
+ num_words
*2 + num_bytes
- 4));
218 return (smb_size
+ num_words
*2 + num_bytes
);
221 static bool valid_smb_header(struct smbd_server_connection
*sconn
,
222 const uint8_t *inbuf
)
224 if (is_encrypted_packet(sconn
, inbuf
)) {
228 * This used to be (strncmp(smb_base(inbuf),"\377SMB",4) == 0)
229 * but it just looks weird to call strncmp for this one.
231 return (IVAL(smb_base(inbuf
), 0) == 0x424D53FF);
234 /* Socket functions for smbd packet processing. */
236 static bool valid_packet_size(size_t len
)
239 * A WRITEX with CAP_LARGE_WRITEX can be 64k worth of data plus 65 bytes
240 * of header. Don't print the error if this fits.... JRA.
243 if (len
> (BUFFER_SIZE
+ LARGE_WRITEX_HDR_SIZE
)) {
244 DEBUG(0,("Invalid packet length! (%lu bytes).\n",
245 (unsigned long)len
));
251 static NTSTATUS
read_packet_remainder(int fd
, char *buffer
,
252 unsigned int timeout
, ssize_t len
)
260 status
= read_fd_with_timeout(fd
, buffer
, len
, len
, timeout
, NULL
);
261 if (!NT_STATUS_IS_OK(status
)) {
262 char addr
[INET6_ADDRSTRLEN
];
263 DEBUG(0, ("read_fd_with_timeout failed for client %s read "
265 get_peer_addr(fd
, addr
, sizeof(addr
)),
271 /****************************************************************************
272 Attempt a zerocopy writeX read. We know here that len > smb_size-4
273 ****************************************************************************/
276 * Unfortunately, earlier versions of smbclient/libsmbclient
277 * don't send this "standard" writeX header. I've fixed this
278 * for 3.2 but we'll use the old method with earlier versions.
279 * Windows and CIFSFS at least use this standard size. Not
283 #define STANDARD_WRITE_AND_X_HEADER_SIZE (smb_size - 4 + /* basic header */ \
284 (2*14) + /* word count (including bcc) */ \
287 static NTSTATUS
receive_smb_raw_talloc_partial_read(TALLOC_CTX
*mem_ctx
,
288 const char lenbuf
[4],
289 struct smbd_server_connection
*sconn
,
292 unsigned int timeout
,
296 /* Size of a WRITEX call (+4 byte len). */
297 char writeX_header
[4 + STANDARD_WRITE_AND_X_HEADER_SIZE
];
298 ssize_t len
= smb_len_large(lenbuf
); /* Could be a UNIX large writeX. */
302 memcpy(writeX_header
, lenbuf
, 4);
304 status
= read_fd_with_timeout(
305 sock
, writeX_header
+ 4,
306 STANDARD_WRITE_AND_X_HEADER_SIZE
,
307 STANDARD_WRITE_AND_X_HEADER_SIZE
,
310 if (!NT_STATUS_IS_OK(status
)) {
311 DEBUG(0, ("read_fd_with_timeout failed for client %s read "
313 tsocket_address_string(sconn
->remote_address
,
320 * Ok - now try and see if this is a possible
324 if (is_valid_writeX_buffer(sconn
, (uint8_t *)writeX_header
)) {
326 * If the data offset is beyond what
327 * we've read, drain the extra bytes.
329 uint16_t doff
= SVAL(writeX_header
,smb_vwv11
);
332 if (doff
> STANDARD_WRITE_AND_X_HEADER_SIZE
) {
333 size_t drain
= doff
- STANDARD_WRITE_AND_X_HEADER_SIZE
;
334 if (drain_socket(sock
, drain
) != drain
) {
335 smb_panic("receive_smb_raw_talloc_partial_read:"
336 " failed to drain pending bytes");
339 doff
= STANDARD_WRITE_AND_X_HEADER_SIZE
;
342 /* Spoof down the length and null out the bcc. */
343 set_message_bcc(writeX_header
, 0);
344 newlen
= smb_len(writeX_header
);
346 /* Copy the header we've written. */
348 *buffer
= (char *)talloc_memdup(mem_ctx
,
350 sizeof(writeX_header
));
352 if (*buffer
== NULL
) {
353 DEBUG(0, ("Could not allocate inbuf of length %d\n",
354 (int)sizeof(writeX_header
)));
355 return NT_STATUS_NO_MEMORY
;
358 /* Work out the remaining bytes. */
359 *p_unread
= len
- STANDARD_WRITE_AND_X_HEADER_SIZE
;
360 *len_ret
= newlen
+ 4;
364 if (!valid_packet_size(len
)) {
365 return NT_STATUS_INVALID_PARAMETER
;
369 * Not a valid writeX call. Just do the standard
373 *buffer
= talloc_array(mem_ctx
, char, len
+4);
375 if (*buffer
== NULL
) {
376 DEBUG(0, ("Could not allocate inbuf of length %d\n",
378 return NT_STATUS_NO_MEMORY
;
381 /* Copy in what we already read. */
384 4 + STANDARD_WRITE_AND_X_HEADER_SIZE
);
385 toread
= len
- STANDARD_WRITE_AND_X_HEADER_SIZE
;
388 status
= read_packet_remainder(
390 (*buffer
) + 4 + STANDARD_WRITE_AND_X_HEADER_SIZE
,
393 if (!NT_STATUS_IS_OK(status
)) {
394 DEBUG(10, ("receive_smb_raw_talloc_partial_read: %s\n",
404 static NTSTATUS
receive_smb_raw_talloc(TALLOC_CTX
*mem_ctx
,
405 struct smbd_server_connection
*sconn
,
407 char **buffer
, unsigned int timeout
,
408 size_t *p_unread
, size_t *plen
)
412 int min_recv_size
= lp_min_receive_file_size();
417 status
= read_smb_length_return_keepalive(sock
, lenbuf
, timeout
,
419 if (!NT_STATUS_IS_OK(status
)) {
423 if (CVAL(lenbuf
,0) == 0 && min_recv_size
&&
424 (smb_len_large(lenbuf
) > /* Could be a UNIX large writeX. */
425 (min_recv_size
+ STANDARD_WRITE_AND_X_HEADER_SIZE
)) &&
426 !srv_is_signing_active(sconn
) &&
427 sconn
->smb1
.echo_handler
.trusted_fde
== NULL
) {
429 return receive_smb_raw_talloc_partial_read(
430 mem_ctx
, lenbuf
, sconn
, sock
, buffer
, timeout
,
434 if (!valid_packet_size(len
)) {
435 return NT_STATUS_INVALID_PARAMETER
;
439 * The +4 here can't wrap, we've checked the length above already.
442 *buffer
= talloc_array(mem_ctx
, char, len
+4);
444 if (*buffer
== NULL
) {
445 DEBUG(0, ("Could not allocate inbuf of length %d\n",
447 return NT_STATUS_NO_MEMORY
;
450 memcpy(*buffer
, lenbuf
, sizeof(lenbuf
));
452 status
= read_packet_remainder(sock
, (*buffer
)+4, timeout
, len
);
453 if (!NT_STATUS_IS_OK(status
)) {
461 static NTSTATUS
receive_smb_talloc(TALLOC_CTX
*mem_ctx
,
462 struct smbd_server_connection
*sconn
,
464 char **buffer
, unsigned int timeout
,
465 size_t *p_unread
, bool *p_encrypted
,
468 bool trusted_channel
)
473 *p_encrypted
= false;
475 status
= receive_smb_raw_talloc(mem_ctx
, sconn
, sock
, buffer
, timeout
,
477 if (!NT_STATUS_IS_OK(status
)) {
478 DEBUG(NT_STATUS_EQUAL(status
, NT_STATUS_END_OF_FILE
)?5:1,
479 ("receive_smb_raw_talloc failed for client %s "
480 "read error = %s.\n",
481 tsocket_address_string(sconn
->remote_address
,
483 nt_errstr(status
)) );
487 if (is_encrypted_packet(sconn
, (uint8_t *)*buffer
)) {
488 status
= srv_decrypt_buffer(sconn
, *buffer
);
489 if (!NT_STATUS_IS_OK(status
)) {
490 DEBUG(0, ("receive_smb_talloc: SMB decryption failed on "
491 "incoming packet! Error %s\n",
492 nt_errstr(status
) ));
498 /* Check the incoming SMB signature. */
499 if (!srv_check_sign_mac(sconn
, *buffer
, seqnum
, trusted_channel
)) {
500 DEBUG(0, ("receive_smb: SMB Signature verification failed on "
501 "incoming packet!\n"));
502 return NT_STATUS_INVALID_NETWORK_RESPONSE
;
510 * Initialize a struct smb_request from an inbuf
513 static bool init_smb_request(struct smb_request
*req
,
514 struct smbd_server_connection
*sconn
,
516 size_t unread_bytes
, bool encrypted
,
519 size_t req_size
= smb_len(inbuf
) + 4;
521 /* Ensure we have at least smb_size bytes. */
522 if (req_size
< smb_size
) {
523 DEBUG(0,("init_smb_request: invalid request size %u\n",
524 (unsigned int)req_size
));
528 req
->request_time
= timeval_current();
530 req
->cmd
= CVAL(inbuf
, smb_com
);
531 req
->flags2
= SVAL(inbuf
, smb_flg2
);
532 req
->smbpid
= SVAL(inbuf
, smb_pid
);
533 req
->mid
= (uint64_t)SVAL(inbuf
, smb_mid
);
534 req
->seqnum
= seqnum
;
535 req
->vuid
= SVAL(inbuf
, smb_uid
);
536 req
->tid
= SVAL(inbuf
, smb_tid
);
537 req
->wct
= CVAL(inbuf
, smb_wct
);
538 req
->vwv
= (const uint16_t *)(inbuf
+smb_vwv
);
539 req
->buflen
= smb_buflen(inbuf
);
540 req
->buf
= (const uint8_t *)smb_buf_const(inbuf
);
541 req
->unread_bytes
= unread_bytes
;
542 req
->encrypted
= encrypted
;
544 req
->conn
= conn_find(sconn
,req
->tid
);
545 req
->chain_fsp
= NULL
;
547 req
->priv_paths
= NULL
;
549 smb_init_perfcount_data(&req
->pcd
);
551 /* Ensure we have at least wct words and 2 bytes of bcc. */
552 if (smb_size
+ req
->wct
*2 > req_size
) {
553 DEBUG(0,("init_smb_request: invalid wct number %u (size %u)\n",
554 (unsigned int)req
->wct
,
555 (unsigned int)req_size
));
558 /* Ensure bcc is correct. */
559 if (((const uint8_t *)smb_buf_const(inbuf
)) + req
->buflen
> inbuf
+ req_size
) {
560 DEBUG(0,("init_smb_request: invalid bcc number %u "
561 "(wct = %u, size %u)\n",
562 (unsigned int)req
->buflen
,
563 (unsigned int)req
->wct
,
564 (unsigned int)req_size
));
572 static void process_smb(struct smbd_server_connection
*conn
,
573 uint8_t *inbuf
, size_t nread
, size_t unread_bytes
,
574 uint32_t seqnum
, bool encrypted
,
575 struct smb_perfcount_data
*deferred_pcd
);
577 static void smbd_deferred_open_timer(struct event_context
*ev
,
578 struct timed_event
*te
,
579 struct timeval _tval
,
582 struct pending_message_list
*msg
= talloc_get_type(private_data
,
583 struct pending_message_list
);
584 struct smbd_server_connection
*sconn
= msg
->sconn
;
585 TALLOC_CTX
*mem_ctx
= talloc_tos();
586 uint64_t mid
= (uint64_t)SVAL(msg
->buf
.data
,smb_mid
);
589 inbuf
= (uint8_t *)talloc_memdup(mem_ctx
, msg
->buf
.data
,
592 exit_server("smbd_deferred_open_timer: talloc failed\n");
596 /* We leave this message on the queue so the open code can
597 know this is a retry. */
598 DEBUG(5,("smbd_deferred_open_timer: trigger mid %llu.\n",
599 (unsigned long long)mid
));
601 /* Mark the message as processed so this is not
602 * re-processed in error. */
603 msg
->processed
= true;
605 process_smb(sconn
, inbuf
,
607 msg
->seqnum
, msg
->encrypted
, &msg
->pcd
);
609 /* If it's still there and was processed, remove it. */
610 msg
= get_deferred_open_message_smb(sconn
, mid
);
611 if (msg
&& msg
->processed
) {
612 remove_deferred_open_message_smb(sconn
, mid
);
616 /****************************************************************************
617 Function to push a message onto the tail of a linked list of smb messages ready
619 ****************************************************************************/
621 static bool push_queued_message(struct smb_request
*req
,
622 struct timeval request_time
,
623 struct timeval end_time
,
624 char *private_data
, size_t private_len
)
626 int msg_len
= smb_len(req
->inbuf
) + 4;
627 struct pending_message_list
*msg
;
629 msg
= talloc_zero(NULL
, struct pending_message_list
);
632 DEBUG(0,("push_message: malloc fail (1)\n"));
635 msg
->sconn
= req
->sconn
;
637 msg
->buf
= data_blob_talloc(msg
, req
->inbuf
, msg_len
);
638 if(msg
->buf
.data
== NULL
) {
639 DEBUG(0,("push_message: malloc fail (2)\n"));
644 msg
->request_time
= request_time
;
645 msg
->seqnum
= req
->seqnum
;
646 msg
->encrypted
= req
->encrypted
;
647 msg
->processed
= false;
648 SMB_PERFCOUNT_DEFER_OP(&req
->pcd
, &msg
->pcd
);
651 msg
->private_data
= data_blob_talloc(msg
, private_data
,
653 if (msg
->private_data
.data
== NULL
) {
654 DEBUG(0,("push_message: malloc fail (3)\n"));
660 msg
->te
= tevent_add_timer(msg
->sconn
->ev_ctx
,
663 smbd_deferred_open_timer
,
666 DEBUG(0,("push_message: event_add_timed failed\n"));
671 DLIST_ADD_END(req
->sconn
->deferred_open_queue
, msg
,
672 struct pending_message_list
*);
674 DEBUG(10,("push_message: pushed message length %u on "
675 "deferred_open_queue\n", (unsigned int)msg_len
));
680 /****************************************************************************
681 Function to delete a sharing violation open message by mid.
682 ****************************************************************************/
684 void remove_deferred_open_message_smb(struct smbd_server_connection
*sconn
,
687 struct pending_message_list
*pml
;
689 if (sconn
->using_smb2
) {
690 remove_deferred_open_message_smb2(sconn
, mid
);
694 for (pml
= sconn
->deferred_open_queue
; pml
; pml
= pml
->next
) {
695 if (mid
== (uint64_t)SVAL(pml
->buf
.data
,smb_mid
)) {
696 DEBUG(10,("remove_deferred_open_message_smb: "
697 "deleting mid %llu len %u\n",
698 (unsigned long long)mid
,
699 (unsigned int)pml
->buf
.length
));
700 DLIST_REMOVE(sconn
->deferred_open_queue
, pml
);
707 /****************************************************************************
708 Move a sharing violation open retry message to the front of the list and
709 schedule it for immediate processing.
710 ****************************************************************************/
712 void schedule_deferred_open_message_smb(struct smbd_server_connection
*sconn
,
715 struct pending_message_list
*pml
;
718 if (sconn
->using_smb2
) {
719 schedule_deferred_open_message_smb2(sconn
, mid
);
723 for (pml
= sconn
->deferred_open_queue
; pml
; pml
= pml
->next
) {
724 uint64_t msg_mid
= (uint64_t)SVAL(pml
->buf
.data
,smb_mid
);
726 DEBUG(10,("schedule_deferred_open_message_smb: [%d] "
729 (unsigned long long)msg_mid
));
731 if (mid
== msg_mid
) {
732 struct timed_event
*te
;
734 if (pml
->processed
) {
735 /* A processed message should not be
737 DEBUG(0,("schedule_deferred_open_message_smb: LOGIC ERROR "
738 "message mid %llu was already processed\n",
739 (unsigned long long)msg_mid
));
743 DEBUG(10,("schedule_deferred_open_message_smb: "
744 "scheduling mid %llu\n",
745 (unsigned long long)mid
));
747 te
= tevent_add_timer(pml
->sconn
->ev_ctx
,
750 smbd_deferred_open_timer
,
753 DEBUG(10,("schedule_deferred_open_message_smb: "
754 "event_add_timed() failed, "
755 "skipping mid %llu\n",
756 (unsigned long long)msg_mid
));
759 TALLOC_FREE(pml
->te
);
761 DLIST_PROMOTE(sconn
->deferred_open_queue
, pml
);
766 DEBUG(10,("schedule_deferred_open_message_smb: failed to "
767 "find message mid %llu\n",
768 (unsigned long long)mid
));
771 /****************************************************************************
772 Return true if this mid is on the deferred queue and was not yet processed.
773 ****************************************************************************/
775 bool open_was_deferred(struct smbd_server_connection
*sconn
, uint64_t mid
)
777 struct pending_message_list
*pml
;
779 if (sconn
->using_smb2
) {
780 return open_was_deferred_smb2(sconn
, mid
);
783 for (pml
= sconn
->deferred_open_queue
; pml
; pml
= pml
->next
) {
784 if (((uint64_t)SVAL(pml
->buf
.data
,smb_mid
)) == mid
&& !pml
->processed
) {
791 /****************************************************************************
792 Return the message queued by this mid.
793 ****************************************************************************/
795 static struct pending_message_list
*get_deferred_open_message_smb(
796 struct smbd_server_connection
*sconn
, uint64_t mid
)
798 struct pending_message_list
*pml
;
800 for (pml
= sconn
->deferred_open_queue
; pml
; pml
= pml
->next
) {
801 if (((uint64_t)SVAL(pml
->buf
.data
,smb_mid
)) == mid
) {
808 /****************************************************************************
809 Get the state data queued by this mid.
810 ****************************************************************************/
812 bool get_deferred_open_message_state(struct smb_request
*smbreq
,
813 struct timeval
*p_request_time
,
816 struct pending_message_list
*pml
;
818 if (smbreq
->sconn
->using_smb2
) {
819 return get_deferred_open_message_state_smb2(smbreq
->smb2req
,
824 pml
= get_deferred_open_message_smb(smbreq
->sconn
, smbreq
->mid
);
828 if (p_request_time
) {
829 *p_request_time
= pml
->request_time
;
832 *pp_state
= (void *)pml
->private_data
.data
;
837 /****************************************************************************
838 Function to push a deferred open smb message onto a linked list of local smb
839 messages ready for processing.
840 ****************************************************************************/
842 bool push_deferred_open_message_smb(struct smb_request
*req
,
843 struct timeval request_time
,
844 struct timeval timeout
,
846 char *private_data
, size_t priv_len
)
848 struct timeval end_time
;
851 return push_deferred_open_message_smb2(req
->smb2req
,
859 if (req
->unread_bytes
) {
860 DEBUG(0,("push_deferred_open_message_smb: logic error ! "
861 "unread_bytes = %u\n",
862 (unsigned int)req
->unread_bytes
));
863 smb_panic("push_deferred_open_message_smb: "
864 "logic error unread_bytes != 0" );
867 end_time
= timeval_sum(&request_time
, &timeout
);
869 DEBUG(10,("push_deferred_open_message_smb: pushing message "
870 "len %u mid %llu timeout time [%u.%06u]\n",
871 (unsigned int) smb_len(req
->inbuf
)+4,
872 (unsigned long long)req
->mid
,
873 (unsigned int)end_time
.tv_sec
,
874 (unsigned int)end_time
.tv_usec
));
876 return push_queued_message(req
, request_time
, end_time
,
877 private_data
, priv_len
);
880 static void smbd_sig_term_handler(struct tevent_context
*ev
,
881 struct tevent_signal
*se
,
887 exit_server_cleanly("termination signal");
890 void smbd_setup_sig_term_handler(struct smbd_server_connection
*sconn
)
892 struct tevent_signal
*se
;
894 se
= tevent_add_signal(sconn
->ev_ctx
,
897 smbd_sig_term_handler
,
900 exit_server("failed to setup SIGTERM handler");
904 static void smbd_sig_hup_handler(struct tevent_context
*ev
,
905 struct tevent_signal
*se
,
911 struct smbd_server_connection
*sconn
=
912 talloc_get_type_abort(private_data
,
913 struct smbd_server_connection
);
915 change_to_root_user();
916 DEBUG(1,("Reloading services after SIGHUP\n"));
917 reload_services(sconn
, conn_snum_used
, false);
920 void smbd_setup_sig_hup_handler(struct smbd_server_connection
*sconn
)
922 struct tevent_signal
*se
;
924 se
= tevent_add_signal(sconn
->ev_ctx
,
927 smbd_sig_hup_handler
,
930 exit_server("failed to setup SIGHUP handler");
934 static void smbd_conf_updated(struct messaging_context
*msg
,
937 struct server_id server_id
,
940 struct smbd_server_connection
*sconn
=
941 talloc_get_type_abort(private_data
,
942 struct smbd_server_connection
);
944 DEBUG(10,("smbd_conf_updated: Got message saying smb.conf was "
945 "updated. Reloading.\n"));
946 change_to_root_user();
947 reload_services(sconn
, conn_snum_used
, false);
951 * Only allow 5 outstanding trans requests. We're allocating memory, so
955 NTSTATUS
allow_new_trans(struct trans_state
*list
, uint64_t mid
)
958 for (; list
!= NULL
; list
= list
->next
) {
960 if (list
->mid
== mid
) {
961 return NT_STATUS_INVALID_PARAMETER
;
967 return NT_STATUS_INSUFFICIENT_RESOURCES
;
974 These flags determine some of the permissions required to do an operation
976 Note that I don't set NEED_WRITE on some write operations because they
977 are used by some brain-dead clients when printing, and I don't want to
978 force write permissions on print services.
980 #define AS_USER (1<<0)
981 #define NEED_WRITE (1<<1) /* Must be paired with AS_USER */
982 #define TIME_INIT (1<<2)
983 #define CAN_IPC (1<<3) /* Must be paired with AS_USER */
984 #define AS_GUEST (1<<5) /* Must *NOT* be paired with AS_USER */
985 #define DO_CHDIR (1<<6)
988 define a list of possible SMB messages and their corresponding
989 functions. Any message that has a NULL function is unimplemented -
990 please feel free to contribute implementations!
992 static const struct smb_message_struct
{
994 void (*fn
)(struct smb_request
*req
);
996 } smb_messages
[256] = {
998 /* 0x00 */ { "SMBmkdir",reply_mkdir
,AS_USER
| NEED_WRITE
},
999 /* 0x01 */ { "SMBrmdir",reply_rmdir
,AS_USER
| NEED_WRITE
},
1000 /* 0x02 */ { "SMBopen",reply_open
,AS_USER
},
1001 /* 0x03 */ { "SMBcreate",reply_mknew
,AS_USER
},
1002 /* 0x04 */ { "SMBclose",reply_close
,AS_USER
| CAN_IPC
},
1003 /* 0x05 */ { "SMBflush",reply_flush
,AS_USER
},
1004 /* 0x06 */ { "SMBunlink",reply_unlink
,AS_USER
| NEED_WRITE
},
1005 /* 0x07 */ { "SMBmv",reply_mv
,AS_USER
| NEED_WRITE
},
1006 /* 0x08 */ { "SMBgetatr",reply_getatr
,AS_USER
},
1007 /* 0x09 */ { "SMBsetatr",reply_setatr
,AS_USER
| NEED_WRITE
},
1008 /* 0x0a */ { "SMBread",reply_read
,AS_USER
},
1009 /* 0x0b */ { "SMBwrite",reply_write
,AS_USER
| CAN_IPC
},
1010 /* 0x0c */ { "SMBlock",reply_lock
,AS_USER
},
1011 /* 0x0d */ { "SMBunlock",reply_unlock
,AS_USER
},
1012 /* 0x0e */ { "SMBctemp",reply_ctemp
,AS_USER
},
1013 /* 0x0f */ { "SMBmknew",reply_mknew
,AS_USER
},
1014 /* 0x10 */ { "SMBcheckpath",reply_checkpath
,AS_USER
},
1015 /* 0x11 */ { "SMBexit",reply_exit
,DO_CHDIR
},
1016 /* 0x12 */ { "SMBlseek",reply_lseek
,AS_USER
},
1017 /* 0x13 */ { "SMBlockread",reply_lockread
,AS_USER
},
1018 /* 0x14 */ { "SMBwriteunlock",reply_writeunlock
,AS_USER
},
1019 /* 0x15 */ { NULL
, NULL
, 0 },
1020 /* 0x16 */ { NULL
, NULL
, 0 },
1021 /* 0x17 */ { NULL
, NULL
, 0 },
1022 /* 0x18 */ { NULL
, NULL
, 0 },
1023 /* 0x19 */ { NULL
, NULL
, 0 },
1024 /* 0x1a */ { "SMBreadbraw",reply_readbraw
,AS_USER
},
1025 /* 0x1b */ { "SMBreadBmpx",reply_readbmpx
,AS_USER
},
1026 /* 0x1c */ { "SMBreadBs",reply_readbs
,AS_USER
},
1027 /* 0x1d */ { "SMBwritebraw",reply_writebraw
,AS_USER
},
1028 /* 0x1e */ { "SMBwriteBmpx",reply_writebmpx
,AS_USER
},
1029 /* 0x1f */ { "SMBwriteBs",reply_writebs
,AS_USER
},
1030 /* 0x20 */ { "SMBwritec", NULL
,0},
1031 /* 0x21 */ { NULL
, NULL
, 0 },
1032 /* 0x22 */ { "SMBsetattrE",reply_setattrE
,AS_USER
| NEED_WRITE
},
1033 /* 0x23 */ { "SMBgetattrE",reply_getattrE
,AS_USER
},
1034 /* 0x24 */ { "SMBlockingX",reply_lockingX
,AS_USER
},
1035 /* 0x25 */ { "SMBtrans",reply_trans
,AS_USER
| CAN_IPC
},
1036 /* 0x26 */ { "SMBtranss",reply_transs
,AS_USER
| CAN_IPC
},
1037 /* 0x27 */ { "SMBioctl",reply_ioctl
,0},
1038 /* 0x28 */ { "SMBioctls", NULL
,AS_USER
},
1039 /* 0x29 */ { "SMBcopy",reply_copy
,AS_USER
| NEED_WRITE
},
1040 /* 0x2a */ { "SMBmove", NULL
,AS_USER
| NEED_WRITE
},
1041 /* 0x2b */ { "SMBecho",reply_echo
,0},
1042 /* 0x2c */ { "SMBwriteclose",reply_writeclose
,AS_USER
},
1043 /* 0x2d */ { "SMBopenX",reply_open_and_X
,AS_USER
| CAN_IPC
},
1044 /* 0x2e */ { "SMBreadX",reply_read_and_X
,AS_USER
| CAN_IPC
},
1045 /* 0x2f */ { "SMBwriteX",reply_write_and_X
,AS_USER
| CAN_IPC
},
1046 /* 0x30 */ { NULL
, NULL
, 0 },
1047 /* 0x31 */ { NULL
, NULL
, 0 },
1048 /* 0x32 */ { "SMBtrans2",reply_trans2
, AS_USER
| CAN_IPC
},
1049 /* 0x33 */ { "SMBtranss2",reply_transs2
, AS_USER
| CAN_IPC
},
1050 /* 0x34 */ { "SMBfindclose",reply_findclose
,AS_USER
},
1051 /* 0x35 */ { "SMBfindnclose",reply_findnclose
,AS_USER
},
1052 /* 0x36 */ { NULL
, NULL
, 0 },
1053 /* 0x37 */ { NULL
, NULL
, 0 },
1054 /* 0x38 */ { NULL
, NULL
, 0 },
1055 /* 0x39 */ { NULL
, NULL
, 0 },
1056 /* 0x3a */ { NULL
, NULL
, 0 },
1057 /* 0x3b */ { NULL
, NULL
, 0 },
1058 /* 0x3c */ { NULL
, NULL
, 0 },
1059 /* 0x3d */ { NULL
, NULL
, 0 },
1060 /* 0x3e */ { NULL
, NULL
, 0 },
1061 /* 0x3f */ { NULL
, NULL
, 0 },
1062 /* 0x40 */ { NULL
, NULL
, 0 },
1063 /* 0x41 */ { NULL
, NULL
, 0 },
1064 /* 0x42 */ { NULL
, NULL
, 0 },
1065 /* 0x43 */ { NULL
, NULL
, 0 },
1066 /* 0x44 */ { NULL
, NULL
, 0 },
1067 /* 0x45 */ { NULL
, NULL
, 0 },
1068 /* 0x46 */ { NULL
, NULL
, 0 },
1069 /* 0x47 */ { NULL
, NULL
, 0 },
1070 /* 0x48 */ { NULL
, NULL
, 0 },
1071 /* 0x49 */ { NULL
, NULL
, 0 },
1072 /* 0x4a */ { NULL
, NULL
, 0 },
1073 /* 0x4b */ { NULL
, NULL
, 0 },
1074 /* 0x4c */ { NULL
, NULL
, 0 },
1075 /* 0x4d */ { NULL
, NULL
, 0 },
1076 /* 0x4e */ { NULL
, NULL
, 0 },
1077 /* 0x4f */ { NULL
, NULL
, 0 },
1078 /* 0x50 */ { NULL
, NULL
, 0 },
1079 /* 0x51 */ { NULL
, NULL
, 0 },
1080 /* 0x52 */ { NULL
, NULL
, 0 },
1081 /* 0x53 */ { NULL
, NULL
, 0 },
1082 /* 0x54 */ { NULL
, NULL
, 0 },
1083 /* 0x55 */ { NULL
, NULL
, 0 },
1084 /* 0x56 */ { NULL
, NULL
, 0 },
1085 /* 0x57 */ { NULL
, NULL
, 0 },
1086 /* 0x58 */ { NULL
, NULL
, 0 },
1087 /* 0x59 */ { NULL
, NULL
, 0 },
1088 /* 0x5a */ { NULL
, NULL
, 0 },
1089 /* 0x5b */ { NULL
, NULL
, 0 },
1090 /* 0x5c */ { NULL
, NULL
, 0 },
1091 /* 0x5d */ { NULL
, NULL
, 0 },
1092 /* 0x5e */ { NULL
, NULL
, 0 },
1093 /* 0x5f */ { NULL
, NULL
, 0 },
1094 /* 0x60 */ { NULL
, NULL
, 0 },
1095 /* 0x61 */ { NULL
, NULL
, 0 },
1096 /* 0x62 */ { NULL
, NULL
, 0 },
1097 /* 0x63 */ { NULL
, NULL
, 0 },
1098 /* 0x64 */ { NULL
, NULL
, 0 },
1099 /* 0x65 */ { NULL
, NULL
, 0 },
1100 /* 0x66 */ { NULL
, NULL
, 0 },
1101 /* 0x67 */ { NULL
, NULL
, 0 },
1102 /* 0x68 */ { NULL
, NULL
, 0 },
1103 /* 0x69 */ { NULL
, NULL
, 0 },
1104 /* 0x6a */ { NULL
, NULL
, 0 },
1105 /* 0x6b */ { NULL
, NULL
, 0 },
1106 /* 0x6c */ { NULL
, NULL
, 0 },
1107 /* 0x6d */ { NULL
, NULL
, 0 },
1108 /* 0x6e */ { NULL
, NULL
, 0 },
1109 /* 0x6f */ { NULL
, NULL
, 0 },
1110 /* 0x70 */ { "SMBtcon",reply_tcon
,0},
1111 /* 0x71 */ { "SMBtdis",reply_tdis
,DO_CHDIR
},
1112 /* 0x72 */ { "SMBnegprot",reply_negprot
,0},
1113 /* 0x73 */ { "SMBsesssetupX",reply_sesssetup_and_X
,0},
1114 /* 0x74 */ { "SMBulogoffX",reply_ulogoffX
, 0}, /* ulogoff doesn't give a valid TID */
1115 /* 0x75 */ { "SMBtconX",reply_tcon_and_X
,0},
1116 /* 0x76 */ { NULL
, NULL
, 0 },
1117 /* 0x77 */ { NULL
, NULL
, 0 },
1118 /* 0x78 */ { NULL
, NULL
, 0 },
1119 /* 0x79 */ { NULL
, NULL
, 0 },
1120 /* 0x7a */ { NULL
, NULL
, 0 },
1121 /* 0x7b */ { NULL
, NULL
, 0 },
1122 /* 0x7c */ { NULL
, NULL
, 0 },
1123 /* 0x7d */ { NULL
, NULL
, 0 },
1124 /* 0x7e */ { NULL
, NULL
, 0 },
1125 /* 0x7f */ { NULL
, NULL
, 0 },
1126 /* 0x80 */ { "SMBdskattr",reply_dskattr
,AS_USER
},
1127 /* 0x81 */ { "SMBsearch",reply_search
,AS_USER
},
1128 /* 0x82 */ { "SMBffirst",reply_search
,AS_USER
},
1129 /* 0x83 */ { "SMBfunique",reply_search
,AS_USER
},
1130 /* 0x84 */ { "SMBfclose",reply_fclose
,AS_USER
},
1131 /* 0x85 */ { NULL
, NULL
, 0 },
1132 /* 0x86 */ { NULL
, NULL
, 0 },
1133 /* 0x87 */ { NULL
, NULL
, 0 },
1134 /* 0x88 */ { NULL
, NULL
, 0 },
1135 /* 0x89 */ { NULL
, NULL
, 0 },
1136 /* 0x8a */ { NULL
, NULL
, 0 },
1137 /* 0x8b */ { NULL
, NULL
, 0 },
1138 /* 0x8c */ { NULL
, NULL
, 0 },
1139 /* 0x8d */ { NULL
, NULL
, 0 },
1140 /* 0x8e */ { NULL
, NULL
, 0 },
1141 /* 0x8f */ { NULL
, NULL
, 0 },
1142 /* 0x90 */ { NULL
, NULL
, 0 },
1143 /* 0x91 */ { NULL
, NULL
, 0 },
1144 /* 0x92 */ { NULL
, NULL
, 0 },
1145 /* 0x93 */ { NULL
, NULL
, 0 },
1146 /* 0x94 */ { NULL
, NULL
, 0 },
1147 /* 0x95 */ { NULL
, NULL
, 0 },
1148 /* 0x96 */ { NULL
, NULL
, 0 },
1149 /* 0x97 */ { NULL
, NULL
, 0 },
1150 /* 0x98 */ { NULL
, NULL
, 0 },
1151 /* 0x99 */ { NULL
, NULL
, 0 },
1152 /* 0x9a */ { NULL
, NULL
, 0 },
1153 /* 0x9b */ { NULL
, NULL
, 0 },
1154 /* 0x9c */ { NULL
, NULL
, 0 },
1155 /* 0x9d */ { NULL
, NULL
, 0 },
1156 /* 0x9e */ { NULL
, NULL
, 0 },
1157 /* 0x9f */ { NULL
, NULL
, 0 },
1158 /* 0xa0 */ { "SMBnttrans",reply_nttrans
, AS_USER
| CAN_IPC
},
1159 /* 0xa1 */ { "SMBnttranss",reply_nttranss
, AS_USER
| CAN_IPC
},
1160 /* 0xa2 */ { "SMBntcreateX",reply_ntcreate_and_X
, AS_USER
| CAN_IPC
},
1161 /* 0xa3 */ { NULL
, NULL
, 0 },
1162 /* 0xa4 */ { "SMBntcancel",reply_ntcancel
, 0 },
1163 /* 0xa5 */ { "SMBntrename",reply_ntrename
, AS_USER
| NEED_WRITE
},
1164 /* 0xa6 */ { NULL
, NULL
, 0 },
1165 /* 0xa7 */ { NULL
, NULL
, 0 },
1166 /* 0xa8 */ { NULL
, NULL
, 0 },
1167 /* 0xa9 */ { NULL
, NULL
, 0 },
1168 /* 0xaa */ { NULL
, NULL
, 0 },
1169 /* 0xab */ { NULL
, NULL
, 0 },
1170 /* 0xac */ { NULL
, NULL
, 0 },
1171 /* 0xad */ { NULL
, NULL
, 0 },
1172 /* 0xae */ { NULL
, NULL
, 0 },
1173 /* 0xaf */ { NULL
, NULL
, 0 },
1174 /* 0xb0 */ { NULL
, NULL
, 0 },
1175 /* 0xb1 */ { NULL
, NULL
, 0 },
1176 /* 0xb2 */ { NULL
, NULL
, 0 },
1177 /* 0xb3 */ { NULL
, NULL
, 0 },
1178 /* 0xb4 */ { NULL
, NULL
, 0 },
1179 /* 0xb5 */ { NULL
, NULL
, 0 },
1180 /* 0xb6 */ { NULL
, NULL
, 0 },
1181 /* 0xb7 */ { NULL
, NULL
, 0 },
1182 /* 0xb8 */ { NULL
, NULL
, 0 },
1183 /* 0xb9 */ { NULL
, NULL
, 0 },
1184 /* 0xba */ { NULL
, NULL
, 0 },
1185 /* 0xbb */ { NULL
, NULL
, 0 },
1186 /* 0xbc */ { NULL
, NULL
, 0 },
1187 /* 0xbd */ { NULL
, NULL
, 0 },
1188 /* 0xbe */ { NULL
, NULL
, 0 },
1189 /* 0xbf */ { NULL
, NULL
, 0 },
1190 /* 0xc0 */ { "SMBsplopen",reply_printopen
,AS_USER
},
1191 /* 0xc1 */ { "SMBsplwr",reply_printwrite
,AS_USER
},
1192 /* 0xc2 */ { "SMBsplclose",reply_printclose
,AS_USER
},
1193 /* 0xc3 */ { "SMBsplretq",reply_printqueue
,AS_USER
},
1194 /* 0xc4 */ { NULL
, NULL
, 0 },
1195 /* 0xc5 */ { NULL
, NULL
, 0 },
1196 /* 0xc6 */ { NULL
, NULL
, 0 },
1197 /* 0xc7 */ { NULL
, NULL
, 0 },
1198 /* 0xc8 */ { NULL
, NULL
, 0 },
1199 /* 0xc9 */ { NULL
, NULL
, 0 },
1200 /* 0xca */ { NULL
, NULL
, 0 },
1201 /* 0xcb */ { NULL
, NULL
, 0 },
1202 /* 0xcc */ { NULL
, NULL
, 0 },
1203 /* 0xcd */ { NULL
, NULL
, 0 },
1204 /* 0xce */ { NULL
, NULL
, 0 },
1205 /* 0xcf */ { NULL
, NULL
, 0 },
1206 /* 0xd0 */ { "SMBsends",reply_sends
,AS_GUEST
},
1207 /* 0xd1 */ { "SMBsendb", NULL
,AS_GUEST
},
1208 /* 0xd2 */ { "SMBfwdname", NULL
,AS_GUEST
},
1209 /* 0xd3 */ { "SMBcancelf", NULL
,AS_GUEST
},
1210 /* 0xd4 */ { "SMBgetmac", NULL
,AS_GUEST
},
1211 /* 0xd5 */ { "SMBsendstrt",reply_sendstrt
,AS_GUEST
},
1212 /* 0xd6 */ { "SMBsendend",reply_sendend
,AS_GUEST
},
1213 /* 0xd7 */ { "SMBsendtxt",reply_sendtxt
,AS_GUEST
},
1214 /* 0xd8 */ { NULL
, NULL
, 0 },
1215 /* 0xd9 */ { NULL
, NULL
, 0 },
1216 /* 0xda */ { NULL
, NULL
, 0 },
1217 /* 0xdb */ { NULL
, NULL
, 0 },
1218 /* 0xdc */ { NULL
, NULL
, 0 },
1219 /* 0xdd */ { NULL
, NULL
, 0 },
1220 /* 0xde */ { NULL
, NULL
, 0 },
1221 /* 0xdf */ { NULL
, NULL
, 0 },
1222 /* 0xe0 */ { NULL
, NULL
, 0 },
1223 /* 0xe1 */ { NULL
, NULL
, 0 },
1224 /* 0xe2 */ { NULL
, NULL
, 0 },
1225 /* 0xe3 */ { NULL
, NULL
, 0 },
1226 /* 0xe4 */ { NULL
, NULL
, 0 },
1227 /* 0xe5 */ { NULL
, NULL
, 0 },
1228 /* 0xe6 */ { NULL
, NULL
, 0 },
1229 /* 0xe7 */ { NULL
, NULL
, 0 },
1230 /* 0xe8 */ { NULL
, NULL
, 0 },
1231 /* 0xe9 */ { NULL
, NULL
, 0 },
1232 /* 0xea */ { NULL
, NULL
, 0 },
1233 /* 0xeb */ { NULL
, NULL
, 0 },
1234 /* 0xec */ { NULL
, NULL
, 0 },
1235 /* 0xed */ { NULL
, NULL
, 0 },
1236 /* 0xee */ { NULL
, NULL
, 0 },
1237 /* 0xef */ { NULL
, NULL
, 0 },
1238 /* 0xf0 */ { NULL
, NULL
, 0 },
1239 /* 0xf1 */ { NULL
, NULL
, 0 },
1240 /* 0xf2 */ { NULL
, NULL
, 0 },
1241 /* 0xf3 */ { NULL
, NULL
, 0 },
1242 /* 0xf4 */ { NULL
, NULL
, 0 },
1243 /* 0xf5 */ { NULL
, NULL
, 0 },
1244 /* 0xf6 */ { NULL
, NULL
, 0 },
1245 /* 0xf7 */ { NULL
, NULL
, 0 },
1246 /* 0xf8 */ { NULL
, NULL
, 0 },
1247 /* 0xf9 */ { NULL
, NULL
, 0 },
1248 /* 0xfa */ { NULL
, NULL
, 0 },
1249 /* 0xfb */ { NULL
, NULL
, 0 },
1250 /* 0xfc */ { NULL
, NULL
, 0 },
1251 /* 0xfd */ { NULL
, NULL
, 0 },
1252 /* 0xfe */ { NULL
, NULL
, 0 },
1253 /* 0xff */ { NULL
, NULL
, 0 }
1257 /*******************************************************************
1258 allocate and initialize a reply packet
1259 ********************************************************************/
1261 static bool create_outbuf(TALLOC_CTX
*mem_ctx
, struct smb_request
*req
,
1262 const char *inbuf
, char **outbuf
, uint8_t num_words
,
1266 * Protect against integer wrap
1268 if ((num_bytes
> 0xffffff)
1269 || ((num_bytes
+ smb_size
+ num_words
*2) > 0xffffff)) {
1271 if (asprintf(&msg
, "num_bytes too large: %u",
1272 (unsigned)num_bytes
) == -1) {
1273 msg
= discard_const_p(char, "num_bytes too large");
1278 *outbuf
= talloc_array(mem_ctx
, char,
1279 smb_size
+ num_words
*2 + num_bytes
);
1280 if (*outbuf
== NULL
) {
1284 construct_reply_common(req
, inbuf
, *outbuf
);
1285 srv_set_message(*outbuf
, num_words
, num_bytes
, false);
1287 * Zero out the word area, the caller has to take care of the bcc area
1290 if (num_words
!= 0) {
1291 memset(*outbuf
+ smb_vwv0
, 0, num_words
*2);
1297 void reply_outbuf(struct smb_request
*req
, uint8 num_words
, uint32 num_bytes
)
1300 if (!create_outbuf(req
, req
, (const char *)req
->inbuf
, &outbuf
, num_words
,
1302 smb_panic("could not allocate output buffer\n");
1304 req
->outbuf
= (uint8_t *)outbuf
;
1308 /*******************************************************************
1309 Dump a packet to a file.
1310 ********************************************************************/
1312 static void smb_dump(const char *name
, int type
, const char *data
)
1317 if (DEBUGLEVEL
< 50) {
1321 len
= smb_len_tcp(data
)+4;
1322 for (i
=1;i
<100;i
++) {
1323 fname
= talloc_asprintf(talloc_tos(),
1327 type
? "req" : "resp");
1328 if (fname
== NULL
) {
1331 fd
= open(fname
, O_WRONLY
|O_CREAT
|O_EXCL
, 0644);
1332 if (fd
!= -1 || errno
!= EEXIST
) break;
1336 ssize_t ret
= write(fd
, data
, len
);
1338 DEBUG(0,("smb_dump: problem: write returned %d\n", (int)ret
));
1340 DEBUG(0,("created %s len %lu\n", fname
, (unsigned long)len
));
1345 /****************************************************************************
1346 Prepare everything for calling the actual request function, and potentially
1347 call the request function via the "new" interface.
1349 Return False if the "legacy" function needs to be called, everything is
1352 Return True if we're done.
1354 I know this API sucks, but it is the one with the least code change I could
1356 ****************************************************************************/
1358 static connection_struct
*switch_message(uint8 type
, struct smb_request
*req
)
1361 uint64_t session_tag
;
1362 connection_struct
*conn
= NULL
;
1363 struct smbd_server_connection
*sconn
= req
->sconn
;
1367 if (smb_messages
[type
].fn
== NULL
) {
1368 DEBUG(0,("Unknown message type %d!\n",type
));
1369 smb_dump("Unknown", 1, (const char *)req
->inbuf
);
1370 reply_unknown_new(req
, type
);
1374 flags
= smb_messages
[type
].flags
;
1376 /* In share mode security we must ignore the vuid. */
1377 session_tag
= req
->vuid
;
1380 DEBUG(3,("switch message %s (pid %d) conn 0x%lx\n", smb_fn_name(type
),
1381 (int)getpid(), (unsigned long)conn
));
1383 smb_dump(smb_fn_name(type
), 1, (const char *)req
->inbuf
);
1385 /* Ensure this value is replaced in the incoming packet. */
1386 SSVAL(discard_const_p(uint8_t, req
->inbuf
),smb_uid
,session_tag
);
1389 * Ensure the correct username is in current_user_info. This is a
1390 * really ugly bugfix for problems with multiple session_setup_and_X's
1391 * being done and allowing %U and %G substitutions to work correctly.
1392 * There is a reason this code is done here, don't move it unless you
1393 * know what you're doing... :-).
1397 if (session_tag
!= sconn
->smb1
.sessions
.last_session_tag
) {
1398 struct user_struct
*vuser
= NULL
;
1400 sconn
->smb1
.sessions
.last_session_tag
= session_tag
;
1401 if(session_tag
!= UID_FIELD_INVALID
) {
1402 vuser
= get_valid_user_struct(sconn
, session_tag
);
1404 set_current_user_info(
1405 vuser
->session_info
->unix_info
->sanitized_username
,
1406 vuser
->session_info
->unix_info
->unix_name
,
1407 vuser
->session_info
->info
->domain_name
);
1412 /* Does this call need to be run as the connected user? */
1413 if (flags
& AS_USER
) {
1415 /* Does this call need a valid tree connection? */
1418 * Amazingly, the error code depends on the command
1421 if (type
== SMBntcreateX
) {
1422 reply_nterror(req
, NT_STATUS_INVALID_HANDLE
);
1424 reply_nterror(req
, NT_STATUS_NETWORK_NAME_DELETED
);
1429 if (!change_to_user(conn
,session_tag
)) {
1430 DEBUG(0, ("Error: Could not change to user. Removing "
1431 "deferred open, mid=%llu.\n",
1432 (unsigned long long)req
->mid
));
1433 reply_force_doserror(req
, ERRSRV
, ERRbaduid
);
1437 /* All NEED_WRITE and CAN_IPC flags must also have AS_USER. */
1439 /* Does it need write permission? */
1440 if ((flags
& NEED_WRITE
) && !CAN_WRITE(conn
)) {
1441 reply_nterror(req
, NT_STATUS_MEDIA_WRITE_PROTECTED
);
1445 /* IPC services are limited */
1446 if (IS_IPC(conn
) && !(flags
& CAN_IPC
)) {
1447 reply_nterror(req
, NT_STATUS_ACCESS_DENIED
);
1451 /* This call needs to be run as root */
1452 change_to_root_user();
1455 /* load service specific parameters */
1457 if (req
->encrypted
) {
1458 conn
->encrypted_tid
= true;
1459 /* encrypted required from now on. */
1460 conn
->encrypt_level
= Required
;
1461 } else if (ENCRYPTION_REQUIRED(conn
)) {
1462 if (req
->cmd
!= SMBtrans2
&& req
->cmd
!= SMBtranss2
) {
1463 exit_server_cleanly("encryption required "
1469 if (!set_current_service(conn
,SVAL(req
->inbuf
,smb_flg
),
1470 (flags
& (AS_USER
|DO_CHDIR
)
1472 reply_nterror(req
, NT_STATUS_ACCESS_DENIED
);
1475 conn
->num_smb_operations
++;
1479 * Does this protocol need to be run as guest? (Only archane
1480 * messenger service requests have this...)
1482 if (flags
& AS_GUEST
) {
1486 if (!change_to_guest()) {
1487 reply_nterror(req
, NT_STATUS_ACCESS_DENIED
);
1491 raddr
= tsocket_address_inet_addr_string(sconn
->remote_address
,
1493 if (raddr
== NULL
) {
1494 reply_nterror(req
, NT_STATUS_NO_MEMORY
);
1499 * Haven't we checked this in smbd_process already???
1502 ok
= allow_access(lp_hostsdeny(-1), lp_hostsallow(-1),
1503 sconn
->remote_hostname
, raddr
);
1507 reply_nterror(req
, NT_STATUS_ACCESS_DENIED
);
1512 smb_messages
[type
].fn(req
);
1516 /****************************************************************************
1517 Construct a reply to the incoming packet.
1518 ****************************************************************************/
1520 static void construct_reply(struct smbd_server_connection
*sconn
,
1521 char *inbuf
, int size
, size_t unread_bytes
,
1522 uint32_t seqnum
, bool encrypted
,
1523 struct smb_perfcount_data
*deferred_pcd
)
1525 connection_struct
*conn
;
1526 struct smb_request
*req
;
1528 if (!(req
= talloc(talloc_tos(), struct smb_request
))) {
1529 smb_panic("could not allocate smb_request");
1532 if (!init_smb_request(req
, sconn
, (uint8
*)inbuf
, unread_bytes
,
1533 encrypted
, seqnum
)) {
1534 exit_server_cleanly("Invalid SMB request");
1537 req
->inbuf
= (uint8_t *)talloc_move(req
, &inbuf
);
1539 /* we popped this message off the queue - keep original perf data */
1541 req
->pcd
= *deferred_pcd
;
1543 SMB_PERFCOUNT_START(&req
->pcd
);
1544 SMB_PERFCOUNT_SET_OP(&req
->pcd
, req
->cmd
);
1545 SMB_PERFCOUNT_SET_MSGLEN_IN(&req
->pcd
, size
);
1548 conn
= switch_message(req
->cmd
, req
);
1550 if (req
->outbuf
== NULL
) {
1554 if (CVAL(req
->outbuf
,0) == 0) {
1555 show_msg((char *)req
->outbuf
);
1558 if (!srv_send_smb(req
->sconn
,
1559 (char *)req
->outbuf
,
1560 true, req
->seqnum
+1,
1561 IS_CONN_ENCRYPTED(conn
)||req
->encrypted
,
1563 exit_server_cleanly("construct_reply: srv_send_smb failed.");
1571 static void construct_reply_chain(struct smbd_server_connection
*sconn
,
1572 char *inbuf
, int size
, uint32_t seqnum
,
1574 struct smb_perfcount_data
*deferred_pcd
)
1576 struct smb_request
**reqs
= NULL
;
1577 struct smb_request
*req
;
1581 ok
= smb1_parse_chain(talloc_tos(), (uint8_t *)inbuf
, sconn
, encrypted
,
1582 seqnum
, &reqs
, &num_reqs
);
1584 char errbuf
[smb_size
];
1585 error_packet(errbuf
, 0, 0, NT_STATUS_INVALID_PARAMETER
,
1586 __LINE__
, __FILE__
);
1587 if (!srv_send_smb(sconn
, errbuf
, true, seqnum
, encrypted
,
1589 exit_server_cleanly("construct_reply_chain: "
1590 "srv_send_smb failed.");
1596 req
->inbuf
= (uint8_t *)talloc_move(reqs
, &inbuf
);
1598 req
->conn
= switch_message(req
->cmd
, req
);
1600 if (req
->outbuf
== NULL
) {
1602 * Request has suspended itself, will come
1607 smb_request_done(req
);
1611 * To be called from an async SMB handler that is potentially chained
1612 * when it is finished for shipping.
1615 void smb_request_done(struct smb_request
*req
)
1617 struct smb_request
**reqs
= NULL
;
1618 struct smb_request
*first_req
;
1619 size_t i
, num_reqs
, next_index
;
1622 if (req
->chain
== NULL
) {
1628 num_reqs
= talloc_array_length(reqs
);
1630 for (i
=0; i
<num_reqs
; i
++) {
1631 if (reqs
[i
] == req
) {
1635 if (i
== num_reqs
) {
1637 * Invalid chain, should not happen
1639 status
= NT_STATUS_INTERNAL_ERROR
;
1644 while ((next_index
< num_reqs
) && (IVAL(req
->outbuf
, smb_rcls
) == 0)) {
1645 struct smb_request
*next
= reqs
[next_index
];
1647 next
->vuid
= SVAL(req
->outbuf
, smb_uid
);
1648 next
->tid
= SVAL(req
->outbuf
, smb_tid
);
1649 next
->conn
= conn_find(req
->sconn
, req
->tid
);
1650 next
->chain_fsp
= req
->chain_fsp
;
1651 next
->inbuf
= (uint8_t *)req
->inbuf
;
1654 req
->conn
= switch_message(req
->cmd
, req
);
1656 if (req
->outbuf
== NULL
) {
1658 * Request has suspended itself, will come
1666 first_req
= reqs
[0];
1668 for (i
=1; i
<next_index
; i
++) {
1671 ok
= smb_splice_chain(&first_req
->outbuf
, reqs
[i
]->outbuf
);
1673 status
= NT_STATUS_INTERNAL_ERROR
;
1678 SSVAL(first_req
->outbuf
, smb_uid
, SVAL(req
->outbuf
, smb_uid
));
1679 SSVAL(first_req
->outbuf
, smb_tid
, SVAL(req
->outbuf
, smb_tid
));
1682 * This scary statement intends to set the
1683 * FLAGS2_32_BIT_ERROR_CODES flg2 field in first_req->outbuf
1684 * to the value last_req->outbuf carries
1686 SSVAL(first_req
->outbuf
, smb_flg2
,
1687 (SVAL(first_req
->outbuf
, smb_flg2
) & ~FLAGS2_32_BIT_ERROR_CODES
)
1688 |(SVAL(req
->outbuf
, smb_flg2
) & FLAGS2_32_BIT_ERROR_CODES
));
1691 * Transfer the error codes from the subrequest to the main one
1693 SSVAL(first_req
->outbuf
, smb_rcls
, SVAL(req
->outbuf
, smb_rcls
));
1694 SSVAL(first_req
->outbuf
, smb_err
, SVAL(req
->outbuf
, smb_err
));
1697 first_req
->outbuf
, talloc_get_size(first_req
->outbuf
) - 4);
1700 if (!srv_send_smb(first_req
->sconn
,
1701 (char *)first_req
->outbuf
,
1702 true, first_req
->seqnum
+1,
1703 IS_CONN_ENCRYPTED(req
->conn
)||first_req
->encrypted
,
1705 exit_server_cleanly("construct_reply_chain: srv_send_smb "
1708 TALLOC_FREE(req
); /* non-chained case */
1709 TALLOC_FREE(reqs
); /* chained case */
1714 char errbuf
[smb_size
];
1715 error_packet(errbuf
, 0, 0, status
, __LINE__
, __FILE__
);
1716 if (!srv_send_smb(req
->sconn
, errbuf
, true,
1717 req
->seqnum
+1, req
->encrypted
,
1719 exit_server_cleanly("construct_reply_chain: "
1720 "srv_send_smb failed.");
1723 TALLOC_FREE(req
); /* non-chained case */
1724 TALLOC_FREE(reqs
); /* chained case */
1727 /****************************************************************************
1728 Process an smb from the client
1729 ****************************************************************************/
1730 static void process_smb(struct smbd_server_connection
*sconn
,
1731 uint8_t *inbuf
, size_t nread
, size_t unread_bytes
,
1732 uint32_t seqnum
, bool encrypted
,
1733 struct smb_perfcount_data
*deferred_pcd
)
1735 int msg_type
= CVAL(inbuf
,0);
1737 DO_PROFILE_INC(smb_count
);
1739 DEBUG( 6, ( "got message type 0x%x of len 0x%x\n", msg_type
,
1741 DEBUG(3, ("Transaction %d of length %d (%u toread)\n",
1742 sconn
->trans_num
, (int)nread
, (unsigned int)unread_bytes
));
1744 if (msg_type
!= NBSSmessage
) {
1746 * NetBIOS session request, keepalive, etc.
1748 reply_special(sconn
, (char *)inbuf
, nread
);
1752 if (sconn
->using_smb2
) {
1753 /* At this point we're not really using smb2,
1754 * we make the decision here.. */
1755 if (smbd_is_smb2_header(inbuf
, nread
)) {
1756 smbd_smb2_first_negprot(sconn
, inbuf
, nread
);
1758 } else if (nread
>= smb_size
&& valid_smb_header(sconn
, inbuf
)
1759 && CVAL(inbuf
, smb_com
) != 0x72) {
1760 /* This is a non-negprot SMB1 packet.
1761 Disable SMB2 from now on. */
1762 sconn
->using_smb2
= false;
1766 /* Make sure this is an SMB packet. smb_size contains NetBIOS header
1767 * so subtract 4 from it. */
1768 if ((nread
< (smb_size
- 4)) || !valid_smb_header(sconn
, inbuf
)) {
1769 DEBUG(2,("Non-SMB packet of length %d. Terminating server\n",
1772 /* special magic for immediate exit */
1774 (IVAL(inbuf
, 4) == 0x74697865) &&
1775 lp_parm_bool(-1, "smbd", "suicide mode", false)) {
1776 uint8_t exitcode
= CVAL(inbuf
, 8);
1777 DEBUG(1, ("Exiting immediately with code %d\n",
1782 exit_server_cleanly("Non-SMB packet");
1785 show_msg((char *)inbuf
);
1787 if ((unread_bytes
== 0) && smb1_is_chain(inbuf
)) {
1788 construct_reply_chain(sconn
, (char *)inbuf
, nread
,
1789 seqnum
, encrypted
, deferred_pcd
);
1791 construct_reply(sconn
, (char *)inbuf
, nread
, unread_bytes
,
1792 seqnum
, encrypted
, deferred_pcd
);
1798 sconn
->num_requests
++;
1800 /* The timeout_processing function isn't run nearly
1801 often enough to implement 'max log size' without
1802 overrunning the size of the file by many megabytes.
1803 This is especially true if we are running at debug
1804 level 10. Checking every 50 SMBs is a nice
1805 tradeoff of performance vs log file size overrun. */
1807 if ((sconn
->num_requests
% 50) == 0 &&
1808 need_to_check_log_size()) {
1809 change_to_root_user();
1814 /****************************************************************************
1815 Return a string containing the function name of a SMB command.
1816 ****************************************************************************/
1818 const char *smb_fn_name(int type
)
1820 const char *unknown_name
= "SMBunknown";
1822 if (smb_messages
[type
].name
== NULL
)
1823 return(unknown_name
);
1825 return(smb_messages
[type
].name
);
1828 /****************************************************************************
1829 Helper functions for contruct_reply.
1830 ****************************************************************************/
1832 void add_to_common_flags2(uint32 v
)
1837 void remove_from_common_flags2(uint32 v
)
1839 common_flags2
&= ~v
;
1842 static void construct_reply_common(struct smb_request
*req
, const char *inbuf
,
1845 uint16_t in_flags2
= SVAL(inbuf
,smb_flg2
);
1846 uint16_t out_flags2
= common_flags2
;
1848 out_flags2
|= in_flags2
& FLAGS2_UNICODE_STRINGS
;
1849 out_flags2
|= in_flags2
& FLAGS2_SMB_SECURITY_SIGNATURES
;
1850 out_flags2
|= in_flags2
& FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED
;
1852 srv_set_message(outbuf
,0,0,false);
1854 SCVAL(outbuf
, smb_com
, req
->cmd
);
1855 SIVAL(outbuf
,smb_rcls
,0);
1856 SCVAL(outbuf
,smb_flg
, FLAG_REPLY
| (CVAL(inbuf
,smb_flg
) & FLAG_CASELESS_PATHNAMES
));
1857 SSVAL(outbuf
,smb_flg2
, out_flags2
);
1858 memset(outbuf
+smb_pidhigh
,'\0',(smb_tid
-smb_pidhigh
));
1859 memcpy(outbuf
+smb_ss_field
, inbuf
+smb_ss_field
, 8);
1861 SSVAL(outbuf
,smb_tid
,SVAL(inbuf
,smb_tid
));
1862 SSVAL(outbuf
,smb_pid
,SVAL(inbuf
,smb_pid
));
1863 SSVAL(outbuf
,smb_uid
,SVAL(inbuf
,smb_uid
));
1864 SSVAL(outbuf
,smb_mid
,SVAL(inbuf
,smb_mid
));
1867 void construct_reply_common_req(struct smb_request
*req
, char *outbuf
)
1869 construct_reply_common(req
, (const char *)req
->inbuf
, outbuf
);
1873 * @brief Find the smb_cmd offset of the last command pushed
1874 * @param[in] buf The buffer we're building up
1875 * @retval Where can we put our next andx cmd?
1877 * While chaining requests, the "next" request we're looking at needs to put
1878 * its SMB_Command before the data the previous request already built up added
1879 * to the chain. Find the offset to the place where we have to put our cmd.
1882 static bool find_andx_cmd_ofs(uint8_t *buf
, size_t *pofs
)
1887 cmd
= CVAL(buf
, smb_com
);
1889 if (!is_andx_req(cmd
)) {
1895 while (CVAL(buf
, ofs
) != 0xff) {
1897 if (!is_andx_req(CVAL(buf
, ofs
))) {
1902 * ofs is from start of smb header, so add the 4 length
1903 * bytes. The next cmd is right after the wct field.
1905 ofs
= SVAL(buf
, ofs
+2) + 4 + 1;
1907 if (ofs
+4 >= talloc_get_size(buf
)) {
1917 * @brief Do the smb chaining at a buffer level
1918 * @param[in] poutbuf Pointer to the talloc'ed buffer to be modified
1919 * @param[in] andx_buf Buffer to be appended
1922 static bool smb_splice_chain(uint8_t **poutbuf
, const uint8_t *andx_buf
)
1924 uint8_t smb_command
= CVAL(andx_buf
, smb_com
);
1925 uint8_t wct
= CVAL(andx_buf
, smb_wct
);
1926 const uint16_t *vwv
= (const uint16_t *)(andx_buf
+ smb_vwv
);
1927 uint32_t num_bytes
= smb_buflen(andx_buf
);
1928 const uint8_t *bytes
= (const uint8_t *)smb_buf_const(andx_buf
);
1931 size_t old_size
, new_size
;
1933 size_t chain_padding
= 0;
1934 size_t andx_cmd_ofs
;
1937 old_size
= talloc_get_size(*poutbuf
);
1939 if ((old_size
% 4) != 0) {
1941 * Align the wct field of subsequent requests to a 4-byte
1944 chain_padding
= 4 - (old_size
% 4);
1948 * After the old request comes the new wct field (1 byte), the vwv's
1949 * and the num_bytes field.
1952 new_size
= old_size
+ chain_padding
+ 1 + wct
* sizeof(uint16_t) + 2;
1953 new_size
+= num_bytes
;
1955 if ((smb_command
!= SMBwriteX
) && (new_size
> 0xffff)) {
1956 DEBUG(1, ("smb_splice_chain: %u bytes won't fit\n",
1957 (unsigned)new_size
));
1961 outbuf
= talloc_realloc(NULL
, *poutbuf
, uint8_t, new_size
);
1962 if (outbuf
== NULL
) {
1963 DEBUG(0, ("talloc failed\n"));
1968 if (!find_andx_cmd_ofs(outbuf
, &andx_cmd_ofs
)) {
1969 DEBUG(1, ("invalid command chain\n"));
1970 *poutbuf
= talloc_realloc(NULL
, *poutbuf
, uint8_t, old_size
);
1974 if (chain_padding
!= 0) {
1975 memset(outbuf
+ old_size
, 0, chain_padding
);
1976 old_size
+= chain_padding
;
1979 SCVAL(outbuf
, andx_cmd_ofs
, smb_command
);
1980 SSVAL(outbuf
, andx_cmd_ofs
+ 2, old_size
- 4);
1985 * Push the chained request:
1990 SCVAL(outbuf
, ofs
, wct
);
1997 memcpy(outbuf
+ ofs
, vwv
, sizeof(uint16_t) * wct
);
2002 * Read&X has an offset into its data buffer at
2003 * vwv[6]. reply_read_andx has no idea anymore that it's
2004 * running from within a chain, so we have to fix up the
2007 * Although it looks disgusting at this place, I want to keep
2008 * it here. The alternative would be to push knowledge about
2009 * the andx chain down into read&x again.
2012 if (smb_command
== SMBreadX
) {
2013 uint8_t *bytes_addr
;
2017 * Invalid read&x response
2022 bytes_addr
= outbuf
+ ofs
/* vwv start */
2023 + sizeof(uint16_t) * wct
/* vwv array */
2024 + sizeof(uint16_t); /* bcc */
2026 SSVAL(outbuf
+ ofs
, 6 * sizeof(uint16_t),
2027 bytes_addr
- outbuf
- 4);
2030 ofs
+= sizeof(uint16_t) * wct
;
2036 SSVAL(outbuf
, ofs
, num_bytes
);
2037 ofs
+= sizeof(uint16_t);
2043 memcpy(outbuf
+ ofs
, bytes
, num_bytes
);
2048 bool smb1_is_chain(const uint8_t *buf
)
2050 uint8_t cmd
, wct
, andx_cmd
;
2052 cmd
= CVAL(buf
, smb_com
);
2053 if (!is_andx_req(cmd
)) {
2056 wct
= CVAL(buf
, smb_wct
);
2060 andx_cmd
= CVAL(buf
, smb_vwv
);
2061 return (andx_cmd
!= 0xFF);
2064 bool smb1_walk_chain(const uint8_t *buf
,
2065 bool (*fn
)(uint8_t cmd
,
2066 uint8_t wct
, const uint16_t *vwv
,
2067 uint16_t num_bytes
, const uint8_t *bytes
,
2068 void *private_data
),
2071 size_t smblen
= smb_len(buf
);
2072 const char *smb_buf
= smb_base(buf
);
2073 uint8_t cmd
, chain_cmd
;
2075 const uint16_t *vwv
;
2077 const uint8_t *bytes
;
2079 cmd
= CVAL(buf
, smb_com
);
2080 wct
= CVAL(buf
, smb_wct
);
2081 vwv
= (const uint16_t *)(buf
+ smb_vwv
);
2082 num_bytes
= smb_buflen(buf
);
2083 bytes
= (uint8_t *)smb_buf_const(buf
);
2085 if (!fn(cmd
, wct
, vwv
, num_bytes
, bytes
, private_data
)) {
2089 if (!is_andx_req(cmd
)) {
2096 chain_cmd
= CVAL(vwv
, 0);
2098 while (chain_cmd
!= 0xff) {
2099 uint32_t chain_offset
; /* uint32_t to avoid overflow */
2100 size_t length_needed
;
2101 ptrdiff_t vwv_offset
;
2103 chain_offset
= SVAL(vwv
+1, 0);
2106 * Check if the client tries to fool us. The chain
2107 * offset needs to point beyond the current request in
2108 * the chain, it needs to strictly grow. Otherwise we
2109 * might be tricked into an endless loop always
2110 * processing the same request over and over again. We
2111 * used to assume that vwv and the byte buffer array
2112 * in a chain are always attached, but OS/2 the
2113 * Write&X/Read&X chain puts the Read&X vwv array
2114 * right behind the Write&X vwv chain. The Write&X bcc
2115 * array is put behind the Read&X vwv array. So now we
2116 * check whether the chain offset points strictly
2117 * behind the previous vwv array. req->buf points
2118 * right after the vwv array of the previous
2120 * https://bugzilla.samba.org/show_bug.cgi?id=8360 for
2124 vwv_offset
= ((const char *)vwv
- smb_buf
);
2125 if (chain_offset
<= vwv_offset
) {
2130 * Next check: Make sure the chain offset does not
2131 * point beyond the overall smb request length.
2134 length_needed
= chain_offset
+1; /* wct */
2135 if (length_needed
> smblen
) {
2140 * Now comes the pointer magic. Goal here is to set up
2141 * vwv and buf correctly again. The chain offset (the
2142 * former vwv[1]) points at the new wct field.
2145 wct
= CVAL(smb_buf
, chain_offset
);
2147 if (is_andx_req(chain_cmd
) && (wct
< 2)) {
2152 * Next consistency check: Make the new vwv array fits
2153 * in the overall smb request.
2156 length_needed
+= (wct
+1)*sizeof(uint16_t); /* vwv+buflen */
2157 if (length_needed
> smblen
) {
2160 vwv
= (const uint16_t *)(smb_buf
+ chain_offset
+ 1);
2163 * Now grab the new byte buffer....
2166 num_bytes
= SVAL(vwv
+wct
, 0);
2169 * .. and check that it fits.
2172 length_needed
+= num_bytes
;
2173 if (length_needed
> smblen
) {
2176 bytes
= (const uint8_t *)(vwv
+wct
+1);
2178 if (!fn(chain_cmd
, wct
, vwv
, num_bytes
, bytes
, private_data
)) {
2182 if (!is_andx_req(chain_cmd
)) {
2185 chain_cmd
= CVAL(vwv
, 0);
2190 static bool smb1_chain_length_cb(uint8_t cmd
,
2191 uint8_t wct
, const uint16_t *vwv
,
2192 uint16_t num_bytes
, const uint8_t *bytes
,
2195 unsigned *count
= (unsigned *)private_data
;
2200 unsigned smb1_chain_length(const uint8_t *buf
)
2204 if (!smb1_walk_chain(buf
, smb1_chain_length_cb
, &count
)) {
2210 struct smb1_parse_chain_state
{
2211 TALLOC_CTX
*mem_ctx
;
2213 struct smbd_server_connection
*sconn
;
2217 struct smb_request
**reqs
;
2221 static bool smb1_parse_chain_cb(uint8_t cmd
,
2222 uint8_t wct
, const uint16_t *vwv
,
2223 uint16_t num_bytes
, const uint8_t *bytes
,
2226 struct smb1_parse_chain_state
*state
=
2227 (struct smb1_parse_chain_state
*)private_data
;
2228 struct smb_request
**reqs
;
2229 struct smb_request
*req
;
2232 reqs
= talloc_realloc(state
->mem_ctx
, state
->reqs
,
2233 struct smb_request
*, state
->num_reqs
+1);
2239 req
= talloc(reqs
, struct smb_request
);
2244 ok
= init_smb_request(req
, state
->sconn
, state
->buf
, 0,
2245 state
->encrypted
, state
->seqnum
);
2252 req
->buflen
= num_bytes
;
2255 reqs
[state
->num_reqs
] = req
;
2256 state
->num_reqs
+= 1;
2260 bool smb1_parse_chain(TALLOC_CTX
*mem_ctx
, const uint8_t *buf
,
2261 struct smbd_server_connection
*sconn
,
2262 bool encrypted
, uint32_t seqnum
,
2263 struct smb_request
***reqs
, unsigned *num_reqs
)
2265 struct smb1_parse_chain_state state
;
2268 state
.mem_ctx
= mem_ctx
;
2270 state
.sconn
= sconn
;
2271 state
.encrypted
= encrypted
;
2272 state
.seqnum
= seqnum
;
2276 if (!smb1_walk_chain(buf
, smb1_parse_chain_cb
, &state
)) {
2277 TALLOC_FREE(state
.reqs
);
2280 for (i
=0; i
<state
.num_reqs
; i
++) {
2281 state
.reqs
[i
]->chain
= state
.reqs
;
2284 *num_reqs
= state
.num_reqs
;
2288 /****************************************************************************
2289 Check if services need reloading.
2290 ****************************************************************************/
2292 static void check_reload(struct smbd_server_connection
*sconn
, time_t t
)
2295 if (last_smb_conf_reload_time
== 0) {
2296 last_smb_conf_reload_time
= t
;
2299 if (t
>= last_smb_conf_reload_time
+SMBD_RELOAD_CHECK
) {
2300 reload_services(sconn
, conn_snum_used
, true);
2301 last_smb_conf_reload_time
= t
;
2305 static bool fd_is_readable(int fd
)
2309 ret
= poll_one_fd(fd
, POLLIN
|POLLHUP
, 0, &revents
);
2311 return ((ret
> 0) && ((revents
& (POLLIN
|POLLHUP
|POLLERR
)) != 0));
2315 static void smbd_server_connection_write_handler(
2316 struct smbd_server_connection
*sconn
)
2318 /* TODO: make write nonblocking */
2321 static void smbd_server_connection_read_handler(
2322 struct smbd_server_connection
*sconn
, int fd
)
2324 uint8_t *inbuf
= NULL
;
2325 size_t inbuf_len
= 0;
2326 size_t unread_bytes
= 0;
2327 bool encrypted
= false;
2328 TALLOC_CTX
*mem_ctx
= talloc_tos();
2334 if (lp_async_smb_echo_handler()
2335 && fd_is_readable(sconn
->smb1
.echo_handler
.trusted_fd
)) {
2337 * This is the super-ugly hack to prefer the packets
2338 * forwarded by the echo handler over the ones by the
2341 fd
= sconn
->smb1
.echo_handler
.trusted_fd
;
2344 from_client
= (sconn
->sock
== fd
);
2347 smbd_lock_socket(sconn
);
2349 if (!fd_is_readable(fd
)) {
2350 DEBUG(10,("the echo listener was faster\n"));
2351 smbd_unlock_socket(sconn
);
2356 /* TODO: make this completely nonblocking */
2357 status
= receive_smb_talloc(mem_ctx
, sconn
, fd
,
2358 (char **)(void *)&inbuf
,
2362 &inbuf_len
, &seqnum
,
2363 false /* trusted channel */);
2366 smbd_unlock_socket(sconn
);
2369 if (NT_STATUS_EQUAL(status
, NT_STATUS_RETRY
)) {
2372 if (NT_STATUS_IS_ERR(status
)) {
2373 exit_server_cleanly("failed to receive smb request");
2375 if (!NT_STATUS_IS_OK(status
)) {
2380 process_smb(sconn
, inbuf
, inbuf_len
, unread_bytes
,
2381 seqnum
, encrypted
, NULL
);
2384 static void smbd_server_connection_handler(struct event_context
*ev
,
2385 struct fd_event
*fde
,
2389 struct smbd_server_connection
*conn
= talloc_get_type(private_data
,
2390 struct smbd_server_connection
);
2392 if (flags
& EVENT_FD_WRITE
) {
2393 smbd_server_connection_write_handler(conn
);
2396 if (flags
& EVENT_FD_READ
) {
2397 smbd_server_connection_read_handler(conn
, conn
->sock
);
2402 static void smbd_server_echo_handler(struct event_context
*ev
,
2403 struct fd_event
*fde
,
2407 struct smbd_server_connection
*conn
= talloc_get_type(private_data
,
2408 struct smbd_server_connection
);
2410 if (flags
& EVENT_FD_WRITE
) {
2411 smbd_server_connection_write_handler(conn
);
2414 if (flags
& EVENT_FD_READ
) {
2415 smbd_server_connection_read_handler(
2416 conn
, conn
->smb1
.echo_handler
.trusted_fd
);
2421 #ifdef CLUSTER_SUPPORT
2422 /****************************************************************************
2423 received when we should release a specific IP
2424 ****************************************************************************/
2425 static void release_ip(const char *ip
, void *priv
)
2427 const char *addr
= (const char *)priv
;
2428 const char *p
= addr
;
2430 if (strncmp("::ffff:", addr
, 7) == 0) {
2434 DEBUG(10, ("Got release IP message for %s, "
2435 "our address is %s\n", ip
, p
));
2437 if ((strcmp(p
, ip
) == 0) || ((p
!= addr
) && strcmp(addr
, ip
) == 0)) {
2438 /* we can't afford to do a clean exit - that involves
2439 database writes, which would potentially mean we
2440 are still running after the failover has finished -
2441 we have to get rid of this process ID straight
2443 DEBUG(0,("Got release IP message for our IP %s - exiting immediately\n",
2445 /* note we must exit with non-zero status so the unclean handler gets
2446 called in the parent, so that the brl database is tickled */
2451 static int client_get_tcp_info(int sock
, struct sockaddr_storage
*server
,
2452 struct sockaddr_storage
*client
)
2455 length
= sizeof(*server
);
2456 if (getsockname(sock
, (struct sockaddr
*)server
, &length
) != 0) {
2459 length
= sizeof(*client
);
2460 if (getpeername(sock
, (struct sockaddr
*)client
, &length
) != 0) {
2468 * Send keepalive packets to our client
2470 static bool keepalive_fn(const struct timeval
*now
, void *private_data
)
2472 struct smbd_server_connection
*sconn
= talloc_get_type_abort(
2473 private_data
, struct smbd_server_connection
);
2476 if (sconn
->using_smb2
) {
2477 /* Don't do keepalives on an SMB2 connection. */
2481 smbd_lock_socket(sconn
);
2482 ret
= send_keepalive(sconn
->sock
);
2483 smbd_unlock_socket(sconn
);
2486 char addr
[INET6_ADDRSTRLEN
];
2488 * Try and give an error message saying what
2491 DEBUG(0, ("send_keepalive failed for client %s. "
2492 "Error %s - exiting\n",
2493 get_peer_addr(sconn
->sock
, addr
, sizeof(addr
)),
2501 * Do the recurring check if we're idle
2503 static bool deadtime_fn(const struct timeval
*now
, void *private_data
)
2505 struct smbd_server_connection
*sconn
=
2506 (struct smbd_server_connection
*)private_data
;
2508 if ((conn_num_open(sconn
) == 0)
2509 || (conn_idle_all(sconn
, now
->tv_sec
))) {
2510 DEBUG( 2, ( "Closing idle connection\n" ) );
2511 messaging_send(sconn
->msg_ctx
,
2512 messaging_server_id(sconn
->msg_ctx
),
2513 MSG_SHUTDOWN
, &data_blob_null
);
2521 * Do the recurring log file and smb.conf reload checks.
2524 static bool housekeeping_fn(const struct timeval
*now
, void *private_data
)
2526 struct smbd_server_connection
*sconn
= talloc_get_type_abort(
2527 private_data
, struct smbd_server_connection
);
2529 DEBUG(5, ("housekeeping\n"));
2531 change_to_root_user();
2533 /* update printer queue caches if necessary */
2534 update_monitored_printq_cache(sconn
->msg_ctx
);
2536 /* check if we need to reload services */
2537 check_reload(sconn
, time_mono(NULL
));
2539 /* Change machine password if neccessary. */
2540 attempt_machine_password_change();
2543 * Force a log file check.
2545 force_check_log_size();
2551 * Read an smb packet in the echo handler child, giving the parent
2552 * smbd one second to react once the socket becomes readable.
2555 struct smbd_echo_read_state
{
2556 struct tevent_context
*ev
;
2557 struct smbd_server_connection
*sconn
;
2564 static void smbd_echo_read_readable(struct tevent_req
*subreq
);
2565 static void smbd_echo_read_waited(struct tevent_req
*subreq
);
2567 static struct tevent_req
*smbd_echo_read_send(
2568 TALLOC_CTX
*mem_ctx
, struct tevent_context
*ev
,
2569 struct smbd_server_connection
*sconn
)
2571 struct tevent_req
*req
, *subreq
;
2572 struct smbd_echo_read_state
*state
;
2574 req
= tevent_req_create(mem_ctx
, &state
,
2575 struct smbd_echo_read_state
);
2580 state
->sconn
= sconn
;
2582 subreq
= wait_for_read_send(state
, ev
, sconn
->sock
);
2583 if (tevent_req_nomem(subreq
, req
)) {
2584 return tevent_req_post(req
, ev
);
2586 tevent_req_set_callback(subreq
, smbd_echo_read_readable
, req
);
2590 static void smbd_echo_read_readable(struct tevent_req
*subreq
)
2592 struct tevent_req
*req
= tevent_req_callback_data(
2593 subreq
, struct tevent_req
);
2594 struct smbd_echo_read_state
*state
= tevent_req_data(
2595 req
, struct smbd_echo_read_state
);
2599 ok
= wait_for_read_recv(subreq
, &err
);
2600 TALLOC_FREE(subreq
);
2602 tevent_req_nterror(req
, map_nt_error_from_unix(err
));
2607 * Give the parent smbd one second to step in
2610 subreq
= tevent_wakeup_send(
2611 state
, state
->ev
, timeval_current_ofs(1, 0));
2612 if (tevent_req_nomem(subreq
, req
)) {
2615 tevent_req_set_callback(subreq
, smbd_echo_read_waited
, req
);
2618 static void smbd_echo_read_waited(struct tevent_req
*subreq
)
2620 struct tevent_req
*req
= tevent_req_callback_data(
2621 subreq
, struct tevent_req
);
2622 struct smbd_echo_read_state
*state
= tevent_req_data(
2623 req
, struct smbd_echo_read_state
);
2624 struct smbd_server_connection
*sconn
= state
->sconn
;
2630 ok
= tevent_wakeup_recv(subreq
);
2631 TALLOC_FREE(subreq
);
2633 tevent_req_nterror(req
, NT_STATUS_INTERNAL_ERROR
);
2637 ok
= smbd_lock_socket_internal(sconn
);
2639 tevent_req_nterror(req
, map_nt_error_from_unix(errno
));
2640 DEBUG(0, ("%s: failed to lock socket\n", __location__
));
2644 if (!fd_is_readable(sconn
->sock
)) {
2645 DEBUG(10,("echo_handler[%d] the parent smbd was faster\n",
2648 ok
= smbd_unlock_socket_internal(sconn
);
2650 tevent_req_nterror(req
, map_nt_error_from_unix(errno
));
2651 DEBUG(1, ("%s: failed to unlock socket\n",
2656 subreq
= wait_for_read_send(state
, state
->ev
, sconn
->sock
);
2657 if (tevent_req_nomem(subreq
, req
)) {
2660 tevent_req_set_callback(subreq
, smbd_echo_read_readable
, req
);
2664 status
= receive_smb_talloc(state
, sconn
, sconn
->sock
, &state
->buf
,
2670 false /* trusted_channel*/);
2672 if (tevent_req_nterror(req
, status
)) {
2673 tevent_req_nterror(req
, status
);
2674 DEBUG(1, ("echo_handler[%d]: receive_smb_raw_talloc failed: %s\n",
2675 (int)getpid(), nt_errstr(status
)));
2679 ok
= smbd_unlock_socket_internal(sconn
);
2681 tevent_req_nterror(req
, map_nt_error_from_unix(errno
));
2682 DEBUG(1, ("%s: failed to unlock socket\n", __location__
));
2685 tevent_req_done(req
);
2688 static NTSTATUS
smbd_echo_read_recv(struct tevent_req
*req
, TALLOC_CTX
*mem_ctx
,
2689 char **pbuf
, size_t *pbuflen
, uint32_t *pseqnum
)
2691 struct smbd_echo_read_state
*state
= tevent_req_data(
2692 req
, struct smbd_echo_read_state
);
2695 if (tevent_req_is_nterror(req
, &status
)) {
2698 *pbuf
= talloc_move(mem_ctx
, &state
->buf
);
2699 *pbuflen
= state
->buflen
;
2700 *pseqnum
= state
->seqnum
;
2701 return NT_STATUS_OK
;
2704 struct smbd_echo_state
{
2705 struct tevent_context
*ev
;
2706 struct iovec
*pending
;
2707 struct smbd_server_connection
*sconn
;
2710 struct tevent_fd
*parent_fde
;
2712 struct tevent_req
*write_req
;
2715 static void smbd_echo_writer_done(struct tevent_req
*req
);
2717 static void smbd_echo_activate_writer(struct smbd_echo_state
*state
)
2721 if (state
->write_req
!= NULL
) {
2725 num_pending
= talloc_array_length(state
->pending
);
2726 if (num_pending
== 0) {
2730 state
->write_req
= writev_send(state
, state
->ev
, NULL
,
2731 state
->parent_pipe
, false,
2732 state
->pending
, num_pending
);
2733 if (state
->write_req
== NULL
) {
2734 DEBUG(1, ("writev_send failed\n"));
2738 talloc_steal(state
->write_req
, state
->pending
);
2739 state
->pending
= NULL
;
2741 tevent_req_set_callback(state
->write_req
, smbd_echo_writer_done
,
2745 static void smbd_echo_writer_done(struct tevent_req
*req
)
2747 struct smbd_echo_state
*state
= tevent_req_callback_data(
2748 req
, struct smbd_echo_state
);
2752 written
= writev_recv(req
, &err
);
2754 state
->write_req
= NULL
;
2755 if (written
== -1) {
2756 DEBUG(1, ("writev to parent failed: %s\n", strerror(err
)));
2759 DEBUG(10,("echo_handler[%d]: forwarded pdu to main\n", (int)getpid()));
2760 smbd_echo_activate_writer(state
);
2763 static bool smbd_echo_reply(struct smbd_echo_state
*state
,
2764 uint8_t *inbuf
, size_t inbuf_len
,
2767 struct smb_request req
;
2768 uint16_t num_replies
;
2772 if ((inbuf_len
== 4) && (CVAL(inbuf
, 0) == NBSSkeepalive
)) {
2773 DEBUG(10, ("Got netbios keepalive\n"));
2780 if (inbuf_len
< smb_size
) {
2781 DEBUG(10, ("Got short packet: %d bytes\n", (int)inbuf_len
));
2784 if (!valid_smb_header(state
->sconn
, inbuf
)) {
2785 DEBUG(10, ("Got invalid SMB header\n"));
2789 if (!init_smb_request(&req
, state
->sconn
, inbuf
, 0, false,
2795 DEBUG(10, ("smbecho handler got cmd %d (%s)\n", (int)req
.cmd
,
2796 smb_messages
[req
.cmd
].name
2797 ? smb_messages
[req
.cmd
].name
: "unknown"));
2799 if (req
.cmd
!= SMBecho
) {
2806 num_replies
= SVAL(req
.vwv
+0, 0);
2807 if (num_replies
!= 1) {
2808 /* Not a Windows "Hey, you're still there?" request */
2812 if (!create_outbuf(talloc_tos(), &req
, (const char *)req
.inbuf
, &outbuf
,
2814 DEBUG(10, ("create_outbuf failed\n"));
2817 req
.outbuf
= (uint8_t *)outbuf
;
2819 SSVAL(req
.outbuf
, smb_vwv0
, num_replies
);
2821 if (req
.buflen
> 0) {
2822 memcpy(smb_buf(req
.outbuf
), req
.buf
, req
.buflen
);
2825 ok
= srv_send_smb(req
.sconn
,
2829 TALLOC_FREE(outbuf
);
2837 static void smbd_echo_exit(struct tevent_context
*ev
,
2838 struct tevent_fd
*fde
, uint16_t flags
,
2841 DEBUG(2, ("smbd_echo_exit: lost connection to parent\n"));
2845 static void smbd_echo_got_packet(struct tevent_req
*req
);
2847 static void smbd_echo_loop(struct smbd_server_connection
*sconn
,
2850 struct smbd_echo_state
*state
;
2851 struct tevent_req
*read_req
;
2853 state
= talloc_zero(sconn
, struct smbd_echo_state
);
2854 if (state
== NULL
) {
2855 DEBUG(1, ("talloc failed\n"));
2858 state
->sconn
= sconn
;
2859 state
->parent_pipe
= parent_pipe
;
2860 state
->ev
= s3_tevent_context_init(state
);
2861 if (state
->ev
== NULL
) {
2862 DEBUG(1, ("tevent_context_init failed\n"));
2866 state
->parent_fde
= tevent_add_fd(state
->ev
, state
, parent_pipe
,
2867 TEVENT_FD_READ
, smbd_echo_exit
,
2869 if (state
->parent_fde
== NULL
) {
2870 DEBUG(1, ("tevent_add_fd failed\n"));
2875 read_req
= smbd_echo_read_send(state
, state
->ev
, sconn
);
2876 if (read_req
== NULL
) {
2877 DEBUG(1, ("smbd_echo_read_send failed\n"));
2881 tevent_req_set_callback(read_req
, smbd_echo_got_packet
, state
);
2884 if (tevent_loop_once(state
->ev
) == -1) {
2885 DEBUG(1, ("tevent_loop_once failed: %s\n",
2893 static void smbd_echo_got_packet(struct tevent_req
*req
)
2895 struct smbd_echo_state
*state
= tevent_req_callback_data(
2896 req
, struct smbd_echo_state
);
2900 uint32_t seqnum
= 0;
2903 status
= smbd_echo_read_recv(req
, state
, &buf
, &buflen
, &seqnum
);
2905 if (!NT_STATUS_IS_OK(status
)) {
2906 DEBUG(1, ("smbd_echo_read_recv returned %s\n",
2907 nt_errstr(status
)));
2911 reply
= smbd_echo_reply(state
, (uint8_t *)buf
, buflen
, seqnum
);
2917 num_pending
= talloc_array_length(state
->pending
);
2918 tmp
= talloc_realloc(state
, state
->pending
, struct iovec
,
2921 DEBUG(1, ("talloc_realloc failed\n"));
2924 state
->pending
= tmp
;
2926 if (buflen
>= smb_size
) {
2928 * place the seqnum in the packet so that the main process
2929 * can reply with signing
2931 SIVAL(buf
, smb_ss_field
, seqnum
);
2932 SIVAL(buf
, smb_ss_field
+4, NT_STATUS_V(NT_STATUS_OK
));
2935 iov
= &state
->pending
[num_pending
];
2936 iov
->iov_base
= buf
;
2937 iov
->iov_len
= buflen
;
2939 DEBUG(10,("echo_handler[%d]: forward to main\n",
2941 smbd_echo_activate_writer(state
);
2944 req
= smbd_echo_read_send(state
, state
->ev
, state
->sconn
);
2946 DEBUG(1, ("smbd_echo_read_send failed\n"));
2949 tevent_req_set_callback(req
, smbd_echo_got_packet
, state
);
2954 * Handle SMBecho requests in a forked child process
2956 bool fork_echo_handler(struct smbd_server_connection
*sconn
)
2958 int listener_pipe
[2];
2962 res
= pipe(listener_pipe
);
2964 DEBUG(1, ("pipe() failed: %s\n", strerror(errno
)));
2967 sconn
->smb1
.echo_handler
.socket_lock_fd
= create_unlink_tmp(lp_lockdir());
2968 if (sconn
->smb1
.echo_handler
.socket_lock_fd
== -1) {
2969 DEBUG(1, ("Could not create lock fd: %s\n", strerror(errno
)));
2977 close(listener_pipe
[0]);
2978 set_blocking(listener_pipe
[1], false);
2980 status
= reinit_after_fork(sconn
->msg_ctx
,
2983 if (!NT_STATUS_IS_OK(status
)) {
2984 DEBUG(1, ("reinit_after_fork failed: %s\n",
2985 nt_errstr(status
)));
2988 smbd_echo_loop(sconn
, listener_pipe
[1]);
2991 close(listener_pipe
[1]);
2992 listener_pipe
[1] = -1;
2993 sconn
->smb1
.echo_handler
.trusted_fd
= listener_pipe
[0];
2995 DEBUG(10,("fork_echo_handler: main[%d] echo_child[%d]\n", (int)getpid(), child
));
2998 * Without smb signing this is the same as the normal smbd
2999 * listener. This needs to change once signing comes in.
3001 sconn
->smb1
.echo_handler
.trusted_fde
= tevent_add_fd(sconn
->ev_ctx
,
3003 sconn
->smb1
.echo_handler
.trusted_fd
,
3005 smbd_server_echo_handler
,
3007 if (sconn
->smb1
.echo_handler
.trusted_fde
== NULL
) {
3008 DEBUG(1, ("event_add_fd failed\n"));
3015 if (listener_pipe
[0] != -1) {
3016 close(listener_pipe
[0]);
3018 if (listener_pipe
[1] != -1) {
3019 close(listener_pipe
[1]);
3021 sconn
->smb1
.echo_handler
.trusted_fd
= -1;
3022 if (sconn
->smb1
.echo_handler
.socket_lock_fd
!= -1) {
3023 close(sconn
->smb1
.echo_handler
.socket_lock_fd
);
3025 sconn
->smb1
.echo_handler
.trusted_fd
= -1;
3026 sconn
->smb1
.echo_handler
.socket_lock_fd
= -1;
3032 static NTSTATUS
smbd_register_ips(struct smbd_server_connection
*sconn
,
3033 struct sockaddr_storage
*srv
,
3034 struct sockaddr_storage
*clnt
)
3036 struct ctdbd_connection
*cconn
;
3037 char tmp_addr
[INET6_ADDRSTRLEN
];
3040 cconn
= messaging_ctdbd_connection();
3041 if (cconn
== NULL
) {
3042 return NT_STATUS_NO_MEMORY
;
3045 if (client_socket_addr(sconn
->sock
, tmp_addr
, sizeof(tmp_addr
)) == NULL
) {
3046 return NT_STATUS_NO_MEMORY
;
3048 addr
= talloc_strdup(cconn
, tmp_addr
);
3050 return NT_STATUS_NO_MEMORY
;
3052 return ctdbd_register_ips(cconn
, srv
, clnt
, release_ip
, addr
);
3057 static bool uid_in_use(const struct user_struct
*user
, uid_t uid
)
3060 if (user
->session_info
&&
3061 (user
->session_info
->unix_token
->uid
== uid
)) {
3069 static bool gid_in_use(const struct user_struct
*user
, gid_t gid
)
3072 if (user
->session_info
!= NULL
) {
3074 struct security_unix_token
*utok
;
3076 utok
= user
->session_info
->unix_token
;
3077 if (utok
->gid
== gid
) {
3080 for(i
=0; i
<utok
->ngroups
; i
++) {
3081 if (utok
->groups
[i
] == gid
) {
3091 static bool sid_in_use(const struct user_struct
*user
,
3092 const struct dom_sid
*psid
)
3095 struct security_token
*tok
;
3097 if (user
->session_info
== NULL
) {
3100 tok
= user
->session_info
->security_token
;
3103 * Not sure session_info->security_token can
3104 * ever be NULL. This check might be not
3109 if (security_token_has_sid(tok
, psid
)) {
3117 static bool id_in_use(const struct user_struct
*user
,
3118 const struct id_cache_ref
*id
)
3122 return uid_in_use(user
, id
->id
.uid
);
3124 return gid_in_use(user
, id
->id
.gid
);
3126 return sid_in_use(user
, &id
->id
.sid
);
3133 static void smbd_id_cache_kill(struct messaging_context
*msg_ctx
,
3136 struct server_id server_id
,
3139 const char *msg
= (data
&& data
->data
)
3140 ? (const char *)data
->data
: "<NULL>";
3141 struct id_cache_ref id
;
3142 struct smbd_server_connection
*sconn
=
3143 talloc_get_type_abort(private_data
,
3144 struct smbd_server_connection
);
3146 if (!id_cache_ref_parse(msg
, &id
)) {
3147 DEBUG(0, ("Invalid ?ID: %s\n", msg
));
3151 if (id_in_use(sconn
->users
, &id
)) {
3152 exit_server_cleanly(msg
);
3154 id_cache_delete_from_cache(&id
);
3157 NTSTATUS
smbXsrv_connection_init_tables(struct smbXsrv_connection
*conn
,
3158 enum protocol_types protocol
)
3160 set_Protocol(protocol
);
3161 conn
->protocol
= protocol
;
3163 return NT_STATUS_OK
;
3166 static void smbd_tevent_trace_callback(enum tevent_trace_point point
,
3169 struct smbXsrv_connection
*conn
=
3170 talloc_get_type_abort(private_data
,
3171 struct smbXsrv_connection
);
3174 case TEVENT_TRACE_BEFORE_WAIT
:
3175 START_PROFILE_STAMP(smbd_idle
, conn
->smbd_idle_profstamp
);
3177 case TEVENT_TRACE_AFTER_WAIT
:
3178 END_PROFILE_STAMP(smbd_idle
, conn
->smbd_idle_profstamp
);
3183 /****************************************************************************
3184 Process commands from the client
3185 ****************************************************************************/
3187 void smbd_process(struct tevent_context
*ev_ctx
,
3188 struct messaging_context
*msg_ctx
,
3192 TALLOC_CTX
*frame
= talloc_stackframe();
3193 struct smbXsrv_connection
*conn
;
3194 struct smbd_server_connection
*sconn
;
3195 struct sockaddr_storage ss
;
3196 struct sockaddr
*sa
= NULL
;
3197 socklen_t sa_socklen
;
3198 struct tsocket_address
*local_address
= NULL
;
3199 struct tsocket_address
*remote_address
= NULL
;
3200 const char *locaddr
= NULL
;
3201 const char *remaddr
= NULL
;
3205 conn
= talloc_zero(ev_ctx
, struct smbXsrv_connection
);
3207 DEBUG(0,("talloc_zero(struct smbXsrv_connection)\n"));
3208 exit_server_cleanly("talloc_zero(struct smbXsrv_connection).\n");
3211 conn
->ev_ctx
= ev_ctx
;
3212 conn
->msg_ctx
= msg_ctx
;
3214 sconn
= talloc_zero(conn
, struct smbd_server_connection
);
3216 exit_server("failed to create smbd_server_connection");
3219 conn
->sconn
= sconn
;
3223 * TODO: remove this...:-)
3225 global_smbXsrv_connection
= conn
;
3227 sconn
->ev_ctx
= ev_ctx
;
3228 sconn
->msg_ctx
= msg_ctx
;
3229 sconn
->sock
= sock_fd
;
3230 sconn
->smb1
.echo_handler
.trusted_fd
= -1;
3231 sconn
->smb1
.echo_handler
.socket_lock_fd
= -1;
3234 smbd_setup_sig_term_handler(sconn
);
3235 smbd_setup_sig_hup_handler(sconn
);
3237 if (!serverid_register(messaging_server_id(msg_ctx
),
3238 FLAG_MSG_GENERAL
|FLAG_MSG_SMBD
3240 |FLAG_MSG_PRINT_GENERAL
)) {
3241 exit_server_cleanly("Could not register myself in "
3246 if (lp_srv_maxprotocol() >= PROTOCOL_SMB2_02
) {
3248 * We're not making the decision here,
3249 * we're just allowing the client
3250 * to decide between SMB1 and SMB2
3251 * with the first negprot
3254 sconn
->using_smb2
= true;
3257 /* Ensure child is set to blocking mode */
3258 set_blocking(sconn
->sock
,True
);
3260 set_socket_options(sconn
->sock
, "SO_KEEPALIVE");
3261 set_socket_options(sconn
->sock
, lp_socket_options());
3263 sa
= (struct sockaddr
*)(void *)&ss
;
3264 sa_socklen
= sizeof(ss
);
3265 ret
= getpeername(sconn
->sock
, sa
, &sa_socklen
);
3267 int level
= (errno
== ENOTCONN
)?2:0;
3268 DEBUG(level
,("getpeername() failed - %s\n", strerror(errno
)));
3269 exit_server_cleanly("getpeername() failed.\n");
3271 ret
= tsocket_address_bsd_from_sockaddr(sconn
,
3275 DEBUG(0,("%s: tsocket_address_bsd_from_sockaddr remote failed - %s\n",
3276 __location__
, strerror(errno
)));
3277 exit_server_cleanly("tsocket_address_bsd_from_sockaddr remote failed.\n");
3280 sa
= (struct sockaddr
*)(void *)&ss
;
3281 sa_socklen
= sizeof(ss
);
3282 ret
= getsockname(sconn
->sock
, sa
, &sa_socklen
);
3284 int level
= (errno
== ENOTCONN
)?2:0;
3285 DEBUG(level
,("getsockname() failed - %s\n", strerror(errno
)));
3286 exit_server_cleanly("getsockname() failed.\n");
3288 ret
= tsocket_address_bsd_from_sockaddr(sconn
,
3292 DEBUG(0,("%s: tsocket_address_bsd_from_sockaddr remote failed - %s\n",
3293 __location__
, strerror(errno
)));
3294 exit_server_cleanly("tsocket_address_bsd_from_sockaddr remote failed.\n");
3297 sconn
->local_address
= local_address
;
3298 sconn
->remote_address
= remote_address
;
3300 if (tsocket_address_is_inet(local_address
, "ip")) {
3301 locaddr
= tsocket_address_inet_addr_string(
3302 sconn
->local_address
,
3304 if (locaddr
== NULL
) {
3305 DEBUG(0,("%s: tsocket_address_inet_addr_string local failed - %s\n",
3306 __location__
, strerror(errno
)));
3307 exit_server_cleanly("tsocket_address_inet_addr_string local failed.\n");
3310 locaddr
= "0.0.0.0";
3313 if (tsocket_address_is_inet(remote_address
, "ip")) {
3314 remaddr
= tsocket_address_inet_addr_string(
3315 sconn
->remote_address
,
3317 if (remaddr
== NULL
) {
3318 DEBUG(0,("%s: tsocket_address_inet_addr_string remote failed - %s\n",
3319 __location__
, strerror(errno
)));
3320 exit_server_cleanly("tsocket_address_inet_addr_string remote failed.\n");
3323 remaddr
= "0.0.0.0";
3326 /* this is needed so that we get decent entries
3327 in smbstatus for port 445 connects */
3328 set_remote_machine_name(remaddr
, false);
3329 reload_services(sconn
, conn_snum_used
, true);
3332 * Before the first packet, check the global hosts allow/ hosts deny
3333 * parameters before doing any parsing of packets passed to us by the
3334 * client. This prevents attacks on our parsing code from hosts not in
3335 * the hosts allow list.
3338 ret
= get_remote_hostname(remote_address
,
3342 DEBUG(0,("%s: get_remote_hostname failed - %s\n",
3343 __location__
, strerror(errno
)));
3344 exit_server_cleanly("get_remote_hostname failed.\n");
3346 if (strequal(rhost
, "UNKNOWN")) {
3347 rhost
= talloc_strdup(talloc_tos(), remaddr
);
3349 sconn
->remote_hostname
= talloc_move(sconn
, &rhost
);
3351 sub_set_socket_ids(remaddr
,
3352 sconn
->remote_hostname
,
3355 if (!allow_access(lp_hostsdeny(-1), lp_hostsallow(-1),
3356 sconn
->remote_hostname
,
3359 * send a negative session response "not listening on calling
3362 unsigned char buf
[5] = {0x83, 0, 0, 1, 0x81};
3363 DEBUG( 1, ("Connection denied from %s to %s\n",
3364 tsocket_address_string(remote_address
, talloc_tos()),
3365 tsocket_address_string(local_address
, talloc_tos())));
3366 (void)srv_send_smb(sconn
,(char *)buf
, false,
3368 exit_server_cleanly("connection denied");
3371 DEBUG(10, ("Connection allowed from %s to %s\n",
3372 tsocket_address_string(remote_address
, talloc_tos()),
3373 tsocket_address_string(local_address
, talloc_tos())));
3375 if (lp_preload_modules()) {
3376 smb_load_modules(lp_preload_modules());
3379 smb_perfcount_init();
3381 if (!init_account_policy()) {
3382 exit_server("Could not open account policy tdb.\n");
3385 if (*lp_rootdir()) {
3386 if (chroot(lp_rootdir()) != 0) {
3387 DEBUG(0,("Failed to change root to %s\n", lp_rootdir()));
3388 exit_server("Failed to chroot()");
3390 if (chdir("/") == -1) {
3391 DEBUG(0,("Failed to chdir to / on chroot to %s\n", lp_rootdir()));
3392 exit_server("Failed to chroot()");
3394 DEBUG(0,("Changed root to %s\n", lp_rootdir()));
3397 if (!srv_init_signing(sconn
)) {
3398 exit_server("Failed to init smb_signing");
3401 if (!file_init(sconn
)) {
3402 exit_server("file_init() failed");
3406 if (!init_oplocks(sconn
))
3407 exit_server("Failed to init oplocks");
3409 /* register our message handlers */
3410 messaging_register(sconn
->msg_ctx
, sconn
,
3411 MSG_SMB_FORCE_TDIS
, msg_force_tdis
);
3412 messaging_register(sconn
->msg_ctx
, sconn
,
3413 MSG_SMB_CLOSE_FILE
, msg_close_file
);
3414 messaging_register(sconn
->msg_ctx
, sconn
,
3415 MSG_SMB_FILE_RENAME
, msg_file_was_renamed
);
3417 id_cache_register_msgs(sconn
->msg_ctx
);
3418 messaging_deregister(sconn
->msg_ctx
, ID_CACHE_KILL
, NULL
);
3419 messaging_register(sconn
->msg_ctx
, sconn
,
3420 ID_CACHE_KILL
, smbd_id_cache_kill
);
3422 messaging_deregister(sconn
->msg_ctx
,
3423 MSG_SMB_CONF_UPDATED
, sconn
->ev_ctx
);
3424 messaging_register(sconn
->msg_ctx
, sconn
,
3425 MSG_SMB_CONF_UPDATED
, smbd_conf_updated
);
3428 * Use the default MSG_DEBUG handler to avoid rebroadcasting
3429 * MSGs to all child processes
3431 messaging_deregister(sconn
->msg_ctx
,
3433 messaging_register(sconn
->msg_ctx
, NULL
,
3434 MSG_DEBUG
, debug_message
);
3436 if ((lp_keepalive() != 0)
3437 && !(event_add_idle(ev_ctx
, NULL
,
3438 timeval_set(lp_keepalive(), 0),
3439 "keepalive", keepalive_fn
,
3441 DEBUG(0, ("Could not add keepalive event\n"));
3445 if (!(event_add_idle(ev_ctx
, NULL
,
3446 timeval_set(IDLE_CLOSED_TIMEOUT
, 0),
3447 "deadtime", deadtime_fn
, sconn
))) {
3448 DEBUG(0, ("Could not add deadtime event\n"));
3452 if (!(event_add_idle(ev_ctx
, NULL
,
3453 timeval_set(SMBD_HOUSEKEEPING_INTERVAL
, 0),
3454 "housekeeping", housekeeping_fn
, sconn
))) {
3455 DEBUG(0, ("Could not add housekeeping event\n"));
3459 #ifdef CLUSTER_SUPPORT
3461 if (lp_clustering()) {
3463 * We need to tell ctdb about our client's TCP
3464 * connection, so that for failover ctdbd can send
3465 * tickle acks, triggering a reconnection by the
3469 struct sockaddr_storage srv
, clnt
;
3471 if (client_get_tcp_info(sconn
->sock
, &srv
, &clnt
) == 0) {
3473 status
= smbd_register_ips(sconn
, &srv
, &clnt
);
3474 if (!NT_STATUS_IS_OK(status
)) {
3475 DEBUG(0, ("ctdbd_register_ips failed: %s\n",
3476 nt_errstr(status
)));
3480 DEBUG(0,("Unable to get tcp info for "
3481 "CTDB_CONTROL_TCP_CLIENT: %s\n",
3488 sconn
->nbt
.got_session
= false;
3490 sconn
->smb1
.negprot
.max_recv
= MIN(lp_max_xmit(),BUFFER_SIZE
);
3492 sconn
->smb1
.sessions
.done_sesssetup
= false;
3493 sconn
->smb1
.sessions
.max_send
= BUFFER_SIZE
;
3494 sconn
->smb1
.sessions
.last_session_tag
= UID_FIELD_INVALID
;
3495 /* this holds info on user ids that are already validated for this VC */
3496 sconn
->smb1
.sessions
.next_vuid
= VUID_OFFSET
;
3499 if (!init_dptrs(sconn
)) {
3500 exit_server("init_dptrs() failed");
3503 sconn
->smb1
.fde
= event_add_fd(ev_ctx
,
3507 smbd_server_connection_handler
,
3509 if (!sconn
->smb1
.fde
) {
3510 exit_server("failed to create smbd_server_connection fde");
3513 sconn
->conn
->local_address
= sconn
->local_address
;
3514 sconn
->conn
->remote_address
= sconn
->remote_address
;
3515 sconn
->conn
->remote_hostname
= sconn
->remote_hostname
;
3516 sconn
->conn
->protocol
= PROTOCOL_NONE
;
3520 tevent_set_trace_callback(ev_ctx
, smbd_tevent_trace_callback
, conn
);
3523 frame
= talloc_stackframe_pool(8192);
3526 if (tevent_loop_once(ev_ctx
) == -1) {
3527 if (errno
!= EINTR
) {
3528 DEBUG(3, ("tevent_loop_once failed: %s,"
3529 " exiting\n", strerror(errno
) ));
3537 exit_server_cleanly(NULL
);
3540 bool req_is_in_chain(struct smb_request
*req
)
3542 if (req
->vwv
!= (const uint16_t *)(req
->inbuf
+smb_vwv
)) {
3544 * We're right now handling a subsequent request, so we must
3550 if (!is_andx_req(req
->cmd
)) {
3556 * Okay, an illegal request, but definitely not chained :-)
3561 return (CVAL(req
->vwv
+0, 0) != 0xFF);