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/>.
23 extern int smb_echo_count
;
26 * Size of data we can send to client. Set
27 * by the client for all protocols above CORE.
28 * Set by us for CORE protocol.
30 int max_send
= BUFFER_SIZE
;
32 * Size of the data we can receive. Set by us.
33 * Can be modified by the max xmit parameter.
35 int max_recv
= BUFFER_SIZE
;
37 SIG_ATOMIC_T reload_after_sighup
= 0;
38 SIG_ATOMIC_T got_sig_term
= 0;
39 extern bool global_machine_password_needs_changing
;
42 /* Accessor function for smb_read_error for smbd functions. */
44 /****************************************************************************
46 ****************************************************************************/
48 bool srv_send_smb(int fd
, char *buffer
, bool do_encrypt
)
53 char *buf_out
= buffer
;
55 /* Sign the outgoing packet if required. */
56 srv_calculate_sign_mac(buf_out
);
59 NTSTATUS status
= srv_encrypt_buffer(buffer
, &buf_out
);
60 if (!NT_STATUS_IS_OK(status
)) {
61 DEBUG(0, ("send_smb: SMB encryption failed "
62 "on outgoing packet! Error %s\n",
68 len
= smb_len(buf_out
) + 4;
70 while (nwritten
< len
) {
71 ret
= write_data(fd
,buf_out
+nwritten
,len
- nwritten
);
73 DEBUG(0,("Error writing %d bytes to client. %d. (%s)\n",
74 (int)len
,(int)ret
, strerror(errno
) ));
75 srv_free_enc_buffer(buf_out
);
81 srv_free_enc_buffer(buf_out
);
85 /*******************************************************************
86 Setup the word count and byte count for a smb message.
87 ********************************************************************/
89 int srv_set_message(char *buf
,
94 if (zero
&& (num_words
|| num_bytes
)) {
95 memset(buf
+ smb_size
,'\0',num_words
*2 + num_bytes
);
97 SCVAL(buf
,smb_wct
,num_words
);
98 SSVAL(buf
,smb_vwv
+ num_words
*SIZEOFWORD
,num_bytes
);
99 smb_setlen(buf
,(smb_size
+ num_words
*2 + num_bytes
- 4));
100 return (smb_size
+ num_words
*2 + num_bytes
);
103 static bool valid_smb_header(const uint8_t *inbuf
)
105 if (is_encrypted_packet(inbuf
)) {
108 return (strncmp(smb_base(inbuf
),"\377SMB",4) == 0);
111 /* Socket functions for smbd packet processing. */
113 static bool valid_packet_size(size_t len
)
116 * A WRITEX with CAP_LARGE_WRITEX can be 64k worth of data plus 65 bytes
117 * of header. Don't print the error if this fits.... JRA.
120 if (len
> (BUFFER_SIZE
+ LARGE_WRITEX_HDR_SIZE
)) {
121 DEBUG(0,("Invalid packet length! (%lu bytes).\n",
122 (unsigned long)len
));
128 static NTSTATUS
read_packet_remainder(int fd
, char *buffer
,
129 unsigned int timeout
, ssize_t len
)
135 return read_socket_with_timeout(fd
, buffer
, len
, len
, timeout
, NULL
);
138 /****************************************************************************
139 Attempt a zerocopy writeX read. We know here that len > smb_size-4
140 ****************************************************************************/
143 * Unfortunately, earlier versions of smbclient/libsmbclient
144 * don't send this "standard" writeX header. I've fixed this
145 * for 3.2 but we'll use the old method with earlier versions.
146 * Windows and CIFSFS at least use this standard size. Not
150 #define STANDARD_WRITE_AND_X_HEADER_SIZE (smb_size - 4 + /* basic header */ \
151 (2*14) + /* word count (including bcc) */ \
154 static NTSTATUS
receive_smb_raw_talloc_partial_read(TALLOC_CTX
*mem_ctx
,
155 const char lenbuf
[4],
156 int fd
, char **buffer
,
157 unsigned int timeout
,
161 /* Size of a WRITEX call (+4 byte len). */
162 char writeX_header
[4 + STANDARD_WRITE_AND_X_HEADER_SIZE
];
163 ssize_t len
= smb_len_large(lenbuf
); /* Could be a UNIX large writeX. */
167 memcpy(writeX_header
, lenbuf
, 4);
169 status
= read_socket_with_timeout(
170 fd
, writeX_header
+ 4,
171 STANDARD_WRITE_AND_X_HEADER_SIZE
,
172 STANDARD_WRITE_AND_X_HEADER_SIZE
,
175 if (!NT_STATUS_IS_OK(status
)) {
180 * Ok - now try and see if this is a possible
184 if (is_valid_writeX_buffer((uint8_t *)writeX_header
)) {
186 * If the data offset is beyond what
187 * we've read, drain the extra bytes.
189 uint16_t doff
= SVAL(writeX_header
,smb_vwv11
);
192 if (doff
> STANDARD_WRITE_AND_X_HEADER_SIZE
) {
193 size_t drain
= doff
- STANDARD_WRITE_AND_X_HEADER_SIZE
;
194 if (drain_socket(smbd_server_fd(), drain
) != drain
) {
195 smb_panic("receive_smb_raw_talloc_partial_read:"
196 " failed to drain pending bytes");
199 doff
= STANDARD_WRITE_AND_X_HEADER_SIZE
;
202 /* Spoof down the length and null out the bcc. */
203 set_message_bcc(writeX_header
, 0);
204 newlen
= smb_len(writeX_header
);
206 /* Copy the header we've written. */
208 *buffer
= (char *)TALLOC_MEMDUP(mem_ctx
,
210 sizeof(writeX_header
));
212 if (*buffer
== NULL
) {
213 DEBUG(0, ("Could not allocate inbuf of length %d\n",
214 (int)sizeof(writeX_header
)));
215 return NT_STATUS_NO_MEMORY
;
218 /* Work out the remaining bytes. */
219 *p_unread
= len
- STANDARD_WRITE_AND_X_HEADER_SIZE
;
220 *len_ret
= newlen
+ 4;
224 if (!valid_packet_size(len
)) {
225 return NT_STATUS_INVALID_PARAMETER
;
229 * Not a valid writeX call. Just do the standard
233 *buffer
= TALLOC_ARRAY(mem_ctx
, char, len
+4);
235 if (*buffer
== NULL
) {
236 DEBUG(0, ("Could not allocate inbuf of length %d\n",
238 return NT_STATUS_NO_MEMORY
;
241 /* Copy in what we already read. */
244 4 + STANDARD_WRITE_AND_X_HEADER_SIZE
);
245 toread
= len
- STANDARD_WRITE_AND_X_HEADER_SIZE
;
248 status
= read_packet_remainder(
249 fd
, (*buffer
) + 4 + STANDARD_WRITE_AND_X_HEADER_SIZE
,
252 if (!NT_STATUS_IS_OK(status
)) {
253 DEBUG(10, ("receive_smb_raw_talloc_partial_read: %s\n",
263 static NTSTATUS
receive_smb_raw_talloc(TALLOC_CTX
*mem_ctx
, int fd
,
264 char **buffer
, unsigned int timeout
,
265 size_t *p_unread
, size_t *plen
)
269 int min_recv_size
= lp_min_receive_file_size();
274 status
= read_smb_length_return_keepalive(fd
, lenbuf
, timeout
, &len
);
275 if (!NT_STATUS_IS_OK(status
)) {
276 DEBUG(10, ("receive_smb_raw: %s\n", nt_errstr(status
)));
280 if (CVAL(lenbuf
,0) == 0 &&
282 smb_len_large(lenbuf
) > min_recv_size
&& /* Could be a UNIX large writeX. */
283 !srv_is_signing_active()) {
285 return receive_smb_raw_talloc_partial_read(
286 mem_ctx
, lenbuf
, fd
, buffer
, timeout
, p_unread
, plen
);
289 if (!valid_packet_size(len
)) {
290 return NT_STATUS_INVALID_PARAMETER
;
294 * The +4 here can't wrap, we've checked the length above already.
297 *buffer
= TALLOC_ARRAY(mem_ctx
, char, len
+4);
299 if (*buffer
== NULL
) {
300 DEBUG(0, ("Could not allocate inbuf of length %d\n",
302 return NT_STATUS_NO_MEMORY
;
305 memcpy(*buffer
, lenbuf
, sizeof(lenbuf
));
307 status
= read_packet_remainder(fd
, (*buffer
)+4, timeout
, len
);
308 if (!NT_STATUS_IS_OK(status
)) {
316 static NTSTATUS
receive_smb_talloc(TALLOC_CTX
*mem_ctx
, int fd
,
317 char **buffer
, unsigned int timeout
,
318 size_t *p_unread
, bool *p_encrypted
,
324 *p_encrypted
= false;
326 status
= receive_smb_raw_talloc(mem_ctx
, fd
, buffer
, timeout
,
328 if (!NT_STATUS_IS_OK(status
)) {
332 if (is_encrypted_packet((uint8_t *)*buffer
)) {
333 status
= srv_decrypt_buffer(*buffer
);
334 if (!NT_STATUS_IS_OK(status
)) {
335 DEBUG(0, ("receive_smb_talloc: SMB decryption failed on "
336 "incoming packet! Error %s\n",
337 nt_errstr(status
) ));
343 /* Check the incoming SMB signature. */
344 if (!srv_check_sign_mac(*buffer
, true)) {
345 DEBUG(0, ("receive_smb: SMB Signature verification failed on "
346 "incoming packet!\n"));
347 return NT_STATUS_INVALID_NETWORK_RESPONSE
;
355 * Initialize a struct smb_request from an inbuf
358 void init_smb_request(struct smb_request
*req
,
363 size_t req_size
= smb_len(inbuf
) + 4;
364 /* Ensure we have at least smb_size bytes. */
365 if (req_size
< smb_size
) {
366 DEBUG(0,("init_smb_request: invalid request size %u\n",
367 (unsigned int)req_size
));
368 exit_server_cleanly("Invalid SMB request");
370 req
->flags2
= SVAL(inbuf
, smb_flg2
);
371 req
->smbpid
= SVAL(inbuf
, smb_pid
);
372 req
->mid
= SVAL(inbuf
, smb_mid
);
373 req
->vuid
= SVAL(inbuf
, smb_uid
);
374 req
->tid
= SVAL(inbuf
, smb_tid
);
375 req
->wct
= CVAL(inbuf
, smb_wct
);
376 req
->unread_bytes
= unread_bytes
;
377 req
->encrypted
= encrypted
;
378 req
->conn
= conn_find(req
->tid
);
379 req
->chain_fsp
= NULL
;
381 /* Ensure we have at least wct words and 2 bytes of bcc. */
382 if (smb_size
+ req
->wct
*2 > req_size
) {
383 DEBUG(0,("init_smb_request: invalid wct number %u (size %u)\n",
384 (unsigned int)req
->wct
,
385 (unsigned int)req_size
));
386 exit_server_cleanly("Invalid SMB request");
388 /* Ensure bcc is correct. */
389 if (((uint8
*)smb_buf(inbuf
)) + smb_buflen(inbuf
) > inbuf
+ req_size
) {
390 DEBUG(0,("init_smb_request: invalid bcc number %u "
391 "(wct = %u, size %u)\n",
392 (unsigned int)smb_buflen(inbuf
),
393 (unsigned int)req
->wct
,
394 (unsigned int)req_size
));
395 exit_server_cleanly("Invalid SMB request");
401 /****************************************************************************
402 structure to hold a linked list of queued messages.
404 ****************************************************************************/
406 static struct pending_message_list
*deferred_open_queue
;
408 /****************************************************************************
409 Function to push a message onto the tail of a linked list of smb messages ready
411 ****************************************************************************/
413 static bool push_queued_message(struct smb_request
*req
,
414 struct timeval request_time
,
415 struct timeval end_time
,
416 char *private_data
, size_t private_len
)
418 int msg_len
= smb_len(req
->inbuf
) + 4;
419 struct pending_message_list
*msg
;
421 msg
= TALLOC_ZERO_P(NULL
, struct pending_message_list
);
424 DEBUG(0,("push_message: malloc fail (1)\n"));
428 msg
->buf
= data_blob_talloc(msg
, req
->inbuf
, msg_len
);
429 if(msg
->buf
.data
== NULL
) {
430 DEBUG(0,("push_message: malloc fail (2)\n"));
435 msg
->request_time
= request_time
;
436 msg
->end_time
= end_time
;
437 msg
->encrypted
= req
->encrypted
;
440 msg
->private_data
= data_blob_talloc(msg
, private_data
,
442 if (msg
->private_data
.data
== NULL
) {
443 DEBUG(0,("push_message: malloc fail (3)\n"));
449 DLIST_ADD_END(deferred_open_queue
, msg
, struct pending_message_list
*);
451 DEBUG(10,("push_message: pushed message length %u on "
452 "deferred_open_queue\n", (unsigned int)msg_len
));
457 /****************************************************************************
458 Function to delete a sharing violation open message by mid.
459 ****************************************************************************/
461 void remove_deferred_open_smb_message(uint16 mid
)
463 struct pending_message_list
*pml
;
465 for (pml
= deferred_open_queue
; pml
; pml
= pml
->next
) {
466 if (mid
== SVAL(pml
->buf
.data
,smb_mid
)) {
467 DEBUG(10,("remove_sharing_violation_open_smb_message: "
468 "deleting mid %u len %u\n",
470 (unsigned int)pml
->buf
.length
));
471 DLIST_REMOVE(deferred_open_queue
, pml
);
478 /****************************************************************************
479 Move a sharing violation open retry message to the front of the list and
480 schedule it for immediate processing.
481 ****************************************************************************/
483 void schedule_deferred_open_smb_message(uint16 mid
)
485 struct pending_message_list
*pml
;
488 for (pml
= deferred_open_queue
; pml
; pml
= pml
->next
) {
489 uint16 msg_mid
= SVAL(pml
->buf
.data
,smb_mid
);
490 DEBUG(10,("schedule_deferred_open_smb_message: [%d] msg_mid = %u\n", i
++,
491 (unsigned int)msg_mid
));
492 if (mid
== msg_mid
) {
493 DEBUG(10,("schedule_deferred_open_smb_message: scheduling mid %u\n",
495 pml
->end_time
.tv_sec
= 0;
496 pml
->end_time
.tv_usec
= 0;
497 DLIST_PROMOTE(deferred_open_queue
, pml
);
502 DEBUG(10,("schedule_deferred_open_smb_message: failed to find message mid %u\n",
506 /****************************************************************************
507 Return true if this mid is on the deferred queue.
508 ****************************************************************************/
510 bool open_was_deferred(uint16 mid
)
512 struct pending_message_list
*pml
;
514 for (pml
= deferred_open_queue
; pml
; pml
= pml
->next
) {
515 if (SVAL(pml
->buf
.data
,smb_mid
) == mid
) {
522 /****************************************************************************
523 Return the message queued by this mid.
524 ****************************************************************************/
526 struct pending_message_list
*get_open_deferred_message(uint16 mid
)
528 struct pending_message_list
*pml
;
530 for (pml
= deferred_open_queue
; pml
; pml
= pml
->next
) {
531 if (SVAL(pml
->buf
.data
,smb_mid
) == mid
) {
538 /****************************************************************************
539 Function to push a deferred open smb message onto a linked list of local smb
540 messages ready for processing.
541 ****************************************************************************/
543 bool push_deferred_smb_message(struct smb_request
*req
,
544 struct timeval request_time
,
545 struct timeval timeout
,
546 char *private_data
, size_t priv_len
)
548 struct timeval end_time
;
550 if (req
->unread_bytes
) {
551 DEBUG(0,("push_deferred_smb_message: logic error ! "
552 "unread_bytes = %u\n",
553 (unsigned int)req
->unread_bytes
));
554 smb_panic("push_deferred_smb_message: "
555 "logic error unread_bytes != 0" );
558 end_time
= timeval_sum(&request_time
, &timeout
);
560 DEBUG(10,("push_deferred_open_smb_message: pushing message len %u mid %u "
561 "timeout time [%u.%06u]\n",
562 (unsigned int) smb_len(req
->inbuf
)+4, (unsigned int)req
->mid
,
563 (unsigned int)end_time
.tv_sec
,
564 (unsigned int)end_time
.tv_usec
));
566 return push_queued_message(req
, request_time
, end_time
,
567 private_data
, priv_len
);
571 struct timed_event
*te
;
572 struct timeval interval
;
574 bool (*handler
)(const struct timeval
*now
, void *private_data
);
578 static void idle_event_handler(struct event_context
*ctx
,
579 struct timed_event
*te
,
580 const struct timeval
*now
,
583 struct idle_event
*event
=
584 talloc_get_type_abort(private_data
, struct idle_event
);
586 TALLOC_FREE(event
->te
);
588 if (!event
->handler(now
, event
->private_data
)) {
589 /* Don't repeat, delete ourselves */
594 event
->te
= event_add_timed(ctx
, event
,
595 timeval_sum(now
, &event
->interval
),
597 idle_event_handler
, event
);
599 /* We can't do much but fail here. */
600 SMB_ASSERT(event
->te
!= NULL
);
603 struct idle_event
*event_add_idle(struct event_context
*event_ctx
,
605 struct timeval interval
,
607 bool (*handler
)(const struct timeval
*now
,
611 struct idle_event
*result
;
612 struct timeval now
= timeval_current();
614 result
= TALLOC_P(mem_ctx
, struct idle_event
);
615 if (result
== NULL
) {
616 DEBUG(0, ("talloc failed\n"));
620 result
->interval
= interval
;
621 result
->handler
= handler
;
622 result
->private_data
= private_data
;
624 if (!(result
->name
= talloc_asprintf(result
, "idle_evt(%s)", name
))) {
625 DEBUG(0, ("talloc failed\n"));
630 result
->te
= event_add_timed(event_ctx
, result
,
631 timeval_sum(&now
, &interval
),
633 idle_event_handler
, result
);
634 if (result
->te
== NULL
) {
635 DEBUG(0, ("event_add_timed failed\n"));
643 /****************************************************************************
644 Do all async processing in here. This includes kernel oplock messages, change
646 ****************************************************************************/
648 static void async_processing(fd_set
*pfds
)
650 DEBUG(10,("async_processing: Doing async processing.\n"));
654 process_kernel_oplocks(smbd_messaging_context(), pfds
);
656 /* Do the aio check again after receive_local_message as it does a
657 select and may have eaten our signal. */
658 /* Is this till true? -- vl */
662 exit_server_cleanly("termination signal");
665 /* check for sighup processing */
666 if (reload_after_sighup
) {
667 change_to_root_user();
668 DEBUG(1,("Reloading services after SIGHUP\n"));
669 reload_services(False
);
670 reload_after_sighup
= 0;
674 /****************************************************************************
675 Add a fd to the set we will be select(2)ing on.
676 ****************************************************************************/
678 static int select_on_fd(int fd
, int maxfd
, fd_set
*fds
)
682 maxfd
= MAX(maxfd
, fd
);
688 /****************************************************************************
689 Do a select on an two fd's - with timeout.
691 If a local udp message has been pushed onto the
692 queue (this can only happen during oplock break
693 processing) call async_processing()
695 If a pending smb message has been pushed onto the
696 queue (this can only happen during oplock break
697 processing) return this next.
699 If the first smbfd is ready then read an smb from it.
700 if the second (loopback UDP) fd is ready then read a message
701 from it and setup the buffer header to identify the length
703 Returns False on timeout or error.
706 The timeout is in milliseconds
707 ****************************************************************************/
709 static NTSTATUS
receive_message_or_smb(TALLOC_CTX
*mem_ctx
, char **buffer
,
711 size_t *p_unread
, bool *p_encrypted
)
724 to
.tv_sec
= SMBD_SELECT_TIMEOUT
;
728 * Note that this call must be before processing any SMB
729 * messages as we need to synchronously process any messages
730 * we may have sent to ourselves from the previous SMB.
732 message_dispatch(smbd_messaging_context());
735 * Check to see if we already have a message on the deferred open queue
736 * and it's time to schedule.
738 if(deferred_open_queue
!= NULL
) {
739 bool pop_message
= False
;
740 struct pending_message_list
*msg
= deferred_open_queue
;
742 if (timeval_is_zero(&msg
->end_time
)) {
749 tdif
= usec_time_diff(&msg
->end_time
, &tv
);
751 /* Timed out. Schedule...*/
753 DEBUG(10,("receive_message_or_smb: queued message timed out.\n"));
755 /* Make a more accurate select timeout. */
756 to
.tv_sec
= tdif
/ 1000000;
757 to
.tv_usec
= tdif
% 1000000;
758 DEBUG(10,("receive_message_or_smb: select with timeout of [%u.%06u]\n",
759 (unsigned int)to
.tv_sec
, (unsigned int)to
.tv_usec
));
765 *buffer
= (char *)talloc_memdup(mem_ctx
, msg
->buf
.data
,
767 if (*buffer
== NULL
) {
768 DEBUG(0, ("talloc failed\n"));
769 return NT_STATUS_NO_MEMORY
;
771 *buffer_len
= msg
->buf
.length
;
772 *p_encrypted
= msg
->encrypted
;
774 /* We leave this message on the queue so the open code can
775 know this is a retry. */
776 DEBUG(5,("receive_message_or_smb: returning deferred open smb message.\n"));
782 * Setup the select fd sets.
789 * Ensure we process oplock break messages by preference.
790 * We have to do this before the select, after the select
791 * and if the select returns EINTR. This is due to the fact
792 * that the selects called from async_processing can eat an EINTR
793 * caused by a signal (we can't take the break message there).
794 * This is hideously complex - *MUST* be simplified for 3.0 ! JRA.
797 if (oplock_message_waiting(&r_fds
)) {
798 DEBUG(10,("receive_message_or_smb: oplock_message is waiting.\n"));
799 async_processing(&r_fds
);
801 * After async processing we must go and do the select again, as
802 * the state of the flag in fds for the server file descriptor is
803 * indeterminate - we may have done I/O on it in the oplock processing. JRA.
809 * Are there any timed events waiting ? If so, ensure we don't
810 * select for longer than it would take to wait for them.
817 event_add_to_select_args(smbd_event_context(), &now
,
818 &r_fds
, &w_fds
, &to
, &maxfd
);
821 if (timeval_is_zero(&to
)) {
822 /* Process a timed event now... */
823 if (run_events(smbd_event_context(), 0, NULL
, NULL
)) {
830 START_PROFILE(smbd_idle
);
832 maxfd
= select_on_fd(smbd_server_fd(), maxfd
, &r_fds
);
833 maxfd
= select_on_fd(oplock_notify_fd(), maxfd
, &r_fds
);
835 selrtn
= sys_select(maxfd
+1,&r_fds
,&w_fds
,NULL
,&to
);
838 END_PROFILE(smbd_idle
);
842 if (run_events(smbd_event_context(), selrtn
, &r_fds
, &w_fds
)) {
846 /* if we get EINTR then maybe we have received an oplock
847 signal - treat this as select returning 1. This is ugly, but
848 is the best we can do until the oplock code knows more about
850 if (selrtn
== -1 && errno
== EINTR
) {
851 async_processing(&r_fds
);
853 * After async processing we must go and do the select again, as
854 * the state of the flag in fds for the server file descriptor is
855 * indeterminate - we may have done I/O on it in the oplock processing. JRA.
862 /* something is wrong. Maybe the socket is dead? */
863 return map_nt_error_from_unix(errno
);
866 /* Did we timeout ? */
872 * Ensure we process oplock break messages by preference.
873 * This is IMPORTANT ! Otherwise we can starve other processes
874 * sending us an oplock break message. JRA.
877 if (oplock_message_waiting(&r_fds
)) {
878 async_processing(&r_fds
);
880 * After async processing we must go and do the select again, as
881 * the state of the flag in fds for the server file descriptor is
882 * indeterminate - we may have done I/O on it in the oplock processing. JRA.
888 * We've just woken up from a protentially long select sleep.
889 * Ensure we process local messages as we need to synchronously
890 * process any messages from other smbd's to avoid file rename race
891 * conditions. This call is cheap if there are no messages waiting.
894 message_dispatch(smbd_messaging_context());
896 status
= receive_smb_talloc(mem_ctx
, smbd_server_fd(), buffer
, 0,
897 p_unread
, p_encrypted
, &len
);
899 if (!NT_STATUS_IS_OK(status
)) {
909 * Only allow 5 outstanding trans requests. We're allocating memory, so
913 NTSTATUS
allow_new_trans(struct trans_state
*list
, int mid
)
916 for (; list
!= NULL
; list
= list
->next
) {
918 if (list
->mid
== mid
) {
919 return NT_STATUS_INVALID_PARAMETER
;
925 return NT_STATUS_INSUFFICIENT_RESOURCES
;
931 /****************************************************************************
932 We're terminating and have closed all our files/connections etc.
933 If there are any pending local messages we need to respond to them
934 before termination so that other smbds don't think we just died whilst
936 ****************************************************************************/
938 void respond_to_all_remaining_local_messages(void)
941 * Assert we have no exclusive open oplocks.
944 if(get_number_of_exclusive_open_oplocks()) {
945 DEBUG(0,("respond_to_all_remaining_local_messages: PANIC : we have %d exclusive oplocks.\n",
946 get_number_of_exclusive_open_oplocks() ));
950 process_kernel_oplocks(smbd_messaging_context(), NULL
);
957 These flags determine some of the permissions required to do an operation
959 Note that I don't set NEED_WRITE on some write operations because they
960 are used by some brain-dead clients when printing, and I don't want to
961 force write permissions on print services.
963 #define AS_USER (1<<0)
964 #define NEED_WRITE (1<<1) /* Must be paired with AS_USER */
965 #define TIME_INIT (1<<2)
966 #define CAN_IPC (1<<3) /* Must be paired with AS_USER */
967 #define AS_GUEST (1<<5) /* Must *NOT* be paired with AS_USER */
968 #define DO_CHDIR (1<<6)
971 define a list of possible SMB messages and their corresponding
972 functions. Any message that has a NULL function is unimplemented -
973 please feel free to contribute implementations!
975 static const struct smb_message_struct
{
977 void (*fn_new
)(struct smb_request
*req
);
979 } smb_messages
[256] = {
981 /* 0x00 */ { "SMBmkdir",reply_mkdir
,AS_USER
| NEED_WRITE
},
982 /* 0x01 */ { "SMBrmdir",reply_rmdir
,AS_USER
| NEED_WRITE
},
983 /* 0x02 */ { "SMBopen",reply_open
,AS_USER
},
984 /* 0x03 */ { "SMBcreate",reply_mknew
,AS_USER
},
985 /* 0x04 */ { "SMBclose",reply_close
,AS_USER
| CAN_IPC
},
986 /* 0x05 */ { "SMBflush",reply_flush
,AS_USER
},
987 /* 0x06 */ { "SMBunlink",reply_unlink
,AS_USER
| NEED_WRITE
},
988 /* 0x07 */ { "SMBmv",reply_mv
,AS_USER
| NEED_WRITE
},
989 /* 0x08 */ { "SMBgetatr",reply_getatr
,AS_USER
},
990 /* 0x09 */ { "SMBsetatr",reply_setatr
,AS_USER
| NEED_WRITE
},
991 /* 0x0a */ { "SMBread",reply_read
,AS_USER
},
992 /* 0x0b */ { "SMBwrite",reply_write
,AS_USER
| CAN_IPC
},
993 /* 0x0c */ { "SMBlock",reply_lock
,AS_USER
},
994 /* 0x0d */ { "SMBunlock",reply_unlock
,AS_USER
},
995 /* 0x0e */ { "SMBctemp",reply_ctemp
,AS_USER
},
996 /* 0x0f */ { "SMBmknew",reply_mknew
,AS_USER
},
997 /* 0x10 */ { "SMBcheckpath",reply_checkpath
,AS_USER
},
998 /* 0x11 */ { "SMBexit",reply_exit
,DO_CHDIR
},
999 /* 0x12 */ { "SMBlseek",reply_lseek
,AS_USER
},
1000 /* 0x13 */ { "SMBlockread",reply_lockread
,AS_USER
},
1001 /* 0x14 */ { "SMBwriteunlock",reply_writeunlock
,AS_USER
},
1002 /* 0x15 */ { NULL
, NULL
, 0 },
1003 /* 0x16 */ { NULL
, NULL
, 0 },
1004 /* 0x17 */ { NULL
, NULL
, 0 },
1005 /* 0x18 */ { NULL
, NULL
, 0 },
1006 /* 0x19 */ { NULL
, NULL
, 0 },
1007 /* 0x1a */ { "SMBreadbraw",reply_readbraw
,AS_USER
},
1008 /* 0x1b */ { "SMBreadBmpx",reply_readbmpx
,AS_USER
},
1009 /* 0x1c */ { "SMBreadBs",reply_readbs
,AS_USER
},
1010 /* 0x1d */ { "SMBwritebraw",reply_writebraw
,AS_USER
},
1011 /* 0x1e */ { "SMBwriteBmpx",reply_writebmpx
,AS_USER
},
1012 /* 0x1f */ { "SMBwriteBs",reply_writebs
,AS_USER
},
1013 /* 0x20 */ { "SMBwritec", NULL
,0},
1014 /* 0x21 */ { NULL
, NULL
, 0 },
1015 /* 0x22 */ { "SMBsetattrE",reply_setattrE
,AS_USER
| NEED_WRITE
},
1016 /* 0x23 */ { "SMBgetattrE",reply_getattrE
,AS_USER
},
1017 /* 0x24 */ { "SMBlockingX",reply_lockingX
,AS_USER
},
1018 /* 0x25 */ { "SMBtrans",reply_trans
,AS_USER
| CAN_IPC
},
1019 /* 0x26 */ { "SMBtranss",reply_transs
,AS_USER
| CAN_IPC
},
1020 /* 0x27 */ { "SMBioctl",reply_ioctl
,0},
1021 /* 0x28 */ { "SMBioctls", NULL
,AS_USER
},
1022 /* 0x29 */ { "SMBcopy",reply_copy
,AS_USER
| NEED_WRITE
},
1023 /* 0x2a */ { "SMBmove", NULL
,AS_USER
| NEED_WRITE
},
1024 /* 0x2b */ { "SMBecho",reply_echo
,0},
1025 /* 0x2c */ { "SMBwriteclose",reply_writeclose
,AS_USER
},
1026 /* 0x2d */ { "SMBopenX",reply_open_and_X
,AS_USER
| CAN_IPC
},
1027 /* 0x2e */ { "SMBreadX",reply_read_and_X
,AS_USER
| CAN_IPC
},
1028 /* 0x2f */ { "SMBwriteX",reply_write_and_X
,AS_USER
| CAN_IPC
},
1029 /* 0x30 */ { NULL
, NULL
, 0 },
1030 /* 0x31 */ { NULL
, NULL
, 0 },
1031 /* 0x32 */ { "SMBtrans2",reply_trans2
, AS_USER
| CAN_IPC
},
1032 /* 0x33 */ { "SMBtranss2",reply_transs2
, AS_USER
},
1033 /* 0x34 */ { "SMBfindclose",reply_findclose
,AS_USER
},
1034 /* 0x35 */ { "SMBfindnclose",reply_findnclose
,AS_USER
},
1035 /* 0x36 */ { NULL
, NULL
, 0 },
1036 /* 0x37 */ { NULL
, NULL
, 0 },
1037 /* 0x38 */ { NULL
, NULL
, 0 },
1038 /* 0x39 */ { NULL
, NULL
, 0 },
1039 /* 0x3a */ { NULL
, NULL
, 0 },
1040 /* 0x3b */ { NULL
, NULL
, 0 },
1041 /* 0x3c */ { NULL
, NULL
, 0 },
1042 /* 0x3d */ { NULL
, NULL
, 0 },
1043 /* 0x3e */ { NULL
, NULL
, 0 },
1044 /* 0x3f */ { NULL
, NULL
, 0 },
1045 /* 0x40 */ { NULL
, NULL
, 0 },
1046 /* 0x41 */ { NULL
, NULL
, 0 },
1047 /* 0x42 */ { NULL
, NULL
, 0 },
1048 /* 0x43 */ { NULL
, NULL
, 0 },
1049 /* 0x44 */ { NULL
, NULL
, 0 },
1050 /* 0x45 */ { NULL
, NULL
, 0 },
1051 /* 0x46 */ { NULL
, NULL
, 0 },
1052 /* 0x47 */ { NULL
, NULL
, 0 },
1053 /* 0x48 */ { NULL
, NULL
, 0 },
1054 /* 0x49 */ { NULL
, NULL
, 0 },
1055 /* 0x4a */ { NULL
, NULL
, 0 },
1056 /* 0x4b */ { NULL
, NULL
, 0 },
1057 /* 0x4c */ { NULL
, NULL
, 0 },
1058 /* 0x4d */ { NULL
, NULL
, 0 },
1059 /* 0x4e */ { NULL
, NULL
, 0 },
1060 /* 0x4f */ { NULL
, NULL
, 0 },
1061 /* 0x50 */ { NULL
, NULL
, 0 },
1062 /* 0x51 */ { NULL
, NULL
, 0 },
1063 /* 0x52 */ { NULL
, NULL
, 0 },
1064 /* 0x53 */ { NULL
, NULL
, 0 },
1065 /* 0x54 */ { NULL
, NULL
, 0 },
1066 /* 0x55 */ { NULL
, NULL
, 0 },
1067 /* 0x56 */ { NULL
, NULL
, 0 },
1068 /* 0x57 */ { NULL
, NULL
, 0 },
1069 /* 0x58 */ { NULL
, NULL
, 0 },
1070 /* 0x59 */ { NULL
, NULL
, 0 },
1071 /* 0x5a */ { NULL
, NULL
, 0 },
1072 /* 0x5b */ { NULL
, NULL
, 0 },
1073 /* 0x5c */ { NULL
, NULL
, 0 },
1074 /* 0x5d */ { NULL
, NULL
, 0 },
1075 /* 0x5e */ { NULL
, NULL
, 0 },
1076 /* 0x5f */ { NULL
, NULL
, 0 },
1077 /* 0x60 */ { NULL
, NULL
, 0 },
1078 /* 0x61 */ { NULL
, NULL
, 0 },
1079 /* 0x62 */ { NULL
, NULL
, 0 },
1080 /* 0x63 */ { NULL
, NULL
, 0 },
1081 /* 0x64 */ { NULL
, NULL
, 0 },
1082 /* 0x65 */ { NULL
, NULL
, 0 },
1083 /* 0x66 */ { NULL
, NULL
, 0 },
1084 /* 0x67 */ { NULL
, NULL
, 0 },
1085 /* 0x68 */ { NULL
, NULL
, 0 },
1086 /* 0x69 */ { NULL
, NULL
, 0 },
1087 /* 0x6a */ { NULL
, NULL
, 0 },
1088 /* 0x6b */ { NULL
, NULL
, 0 },
1089 /* 0x6c */ { NULL
, NULL
, 0 },
1090 /* 0x6d */ { NULL
, NULL
, 0 },
1091 /* 0x6e */ { NULL
, NULL
, 0 },
1092 /* 0x6f */ { NULL
, NULL
, 0 },
1093 /* 0x70 */ { "SMBtcon",reply_tcon
,0},
1094 /* 0x71 */ { "SMBtdis",reply_tdis
,DO_CHDIR
},
1095 /* 0x72 */ { "SMBnegprot",reply_negprot
,0},
1096 /* 0x73 */ { "SMBsesssetupX",reply_sesssetup_and_X
,0},
1097 /* 0x74 */ { "SMBulogoffX",reply_ulogoffX
, 0}, /* ulogoff doesn't give a valid TID */
1098 /* 0x75 */ { "SMBtconX",reply_tcon_and_X
,0},
1099 /* 0x76 */ { NULL
, NULL
, 0 },
1100 /* 0x77 */ { NULL
, NULL
, 0 },
1101 /* 0x78 */ { NULL
, NULL
, 0 },
1102 /* 0x79 */ { NULL
, NULL
, 0 },
1103 /* 0x7a */ { NULL
, NULL
, 0 },
1104 /* 0x7b */ { NULL
, NULL
, 0 },
1105 /* 0x7c */ { NULL
, NULL
, 0 },
1106 /* 0x7d */ { NULL
, NULL
, 0 },
1107 /* 0x7e */ { NULL
, NULL
, 0 },
1108 /* 0x7f */ { NULL
, NULL
, 0 },
1109 /* 0x80 */ { "SMBdskattr",reply_dskattr
,AS_USER
},
1110 /* 0x81 */ { "SMBsearch",reply_search
,AS_USER
},
1111 /* 0x82 */ { "SMBffirst",reply_search
,AS_USER
},
1112 /* 0x83 */ { "SMBfunique",reply_search
,AS_USER
},
1113 /* 0x84 */ { "SMBfclose",reply_fclose
,AS_USER
},
1114 /* 0x85 */ { NULL
, NULL
, 0 },
1115 /* 0x86 */ { NULL
, NULL
, 0 },
1116 /* 0x87 */ { NULL
, NULL
, 0 },
1117 /* 0x88 */ { NULL
, NULL
, 0 },
1118 /* 0x89 */ { NULL
, NULL
, 0 },
1119 /* 0x8a */ { NULL
, NULL
, 0 },
1120 /* 0x8b */ { NULL
, NULL
, 0 },
1121 /* 0x8c */ { NULL
, NULL
, 0 },
1122 /* 0x8d */ { NULL
, NULL
, 0 },
1123 /* 0x8e */ { NULL
, NULL
, 0 },
1124 /* 0x8f */ { NULL
, NULL
, 0 },
1125 /* 0x90 */ { NULL
, NULL
, 0 },
1126 /* 0x91 */ { NULL
, NULL
, 0 },
1127 /* 0x92 */ { NULL
, NULL
, 0 },
1128 /* 0x93 */ { NULL
, NULL
, 0 },
1129 /* 0x94 */ { NULL
, NULL
, 0 },
1130 /* 0x95 */ { NULL
, NULL
, 0 },
1131 /* 0x96 */ { NULL
, NULL
, 0 },
1132 /* 0x97 */ { NULL
, NULL
, 0 },
1133 /* 0x98 */ { NULL
, NULL
, 0 },
1134 /* 0x99 */ { NULL
, NULL
, 0 },
1135 /* 0x9a */ { NULL
, NULL
, 0 },
1136 /* 0x9b */ { NULL
, NULL
, 0 },
1137 /* 0x9c */ { NULL
, NULL
, 0 },
1138 /* 0x9d */ { NULL
, NULL
, 0 },
1139 /* 0x9e */ { NULL
, NULL
, 0 },
1140 /* 0x9f */ { NULL
, NULL
, 0 },
1141 /* 0xa0 */ { "SMBnttrans",reply_nttrans
, AS_USER
| CAN_IPC
},
1142 /* 0xa1 */ { "SMBnttranss",reply_nttranss
, AS_USER
| CAN_IPC
},
1143 /* 0xa2 */ { "SMBntcreateX",reply_ntcreate_and_X
, AS_USER
| CAN_IPC
},
1144 /* 0xa3 */ { NULL
, NULL
, 0 },
1145 /* 0xa4 */ { "SMBntcancel",reply_ntcancel
, 0 },
1146 /* 0xa5 */ { "SMBntrename",reply_ntrename
, AS_USER
| NEED_WRITE
},
1147 /* 0xa6 */ { NULL
, NULL
, 0 },
1148 /* 0xa7 */ { NULL
, NULL
, 0 },
1149 /* 0xa8 */ { NULL
, NULL
, 0 },
1150 /* 0xa9 */ { NULL
, NULL
, 0 },
1151 /* 0xaa */ { NULL
, NULL
, 0 },
1152 /* 0xab */ { NULL
, NULL
, 0 },
1153 /* 0xac */ { NULL
, NULL
, 0 },
1154 /* 0xad */ { NULL
, NULL
, 0 },
1155 /* 0xae */ { NULL
, NULL
, 0 },
1156 /* 0xaf */ { NULL
, NULL
, 0 },
1157 /* 0xb0 */ { NULL
, NULL
, 0 },
1158 /* 0xb1 */ { NULL
, NULL
, 0 },
1159 /* 0xb2 */ { NULL
, NULL
, 0 },
1160 /* 0xb3 */ { NULL
, NULL
, 0 },
1161 /* 0xb4 */ { NULL
, NULL
, 0 },
1162 /* 0xb5 */ { NULL
, NULL
, 0 },
1163 /* 0xb6 */ { NULL
, NULL
, 0 },
1164 /* 0xb7 */ { NULL
, NULL
, 0 },
1165 /* 0xb8 */ { NULL
, NULL
, 0 },
1166 /* 0xb9 */ { NULL
, NULL
, 0 },
1167 /* 0xba */ { NULL
, NULL
, 0 },
1168 /* 0xbb */ { NULL
, NULL
, 0 },
1169 /* 0xbc */ { NULL
, NULL
, 0 },
1170 /* 0xbd */ { NULL
, NULL
, 0 },
1171 /* 0xbe */ { NULL
, NULL
, 0 },
1172 /* 0xbf */ { NULL
, NULL
, 0 },
1173 /* 0xc0 */ { "SMBsplopen",reply_printopen
,AS_USER
},
1174 /* 0xc1 */ { "SMBsplwr",reply_printwrite
,AS_USER
},
1175 /* 0xc2 */ { "SMBsplclose",reply_printclose
,AS_USER
},
1176 /* 0xc3 */ { "SMBsplretq",reply_printqueue
,AS_USER
},
1177 /* 0xc4 */ { NULL
, NULL
, 0 },
1178 /* 0xc5 */ { NULL
, NULL
, 0 },
1179 /* 0xc6 */ { NULL
, NULL
, 0 },
1180 /* 0xc7 */ { NULL
, NULL
, 0 },
1181 /* 0xc8 */ { NULL
, NULL
, 0 },
1182 /* 0xc9 */ { NULL
, NULL
, 0 },
1183 /* 0xca */ { NULL
, NULL
, 0 },
1184 /* 0xcb */ { NULL
, NULL
, 0 },
1185 /* 0xcc */ { NULL
, NULL
, 0 },
1186 /* 0xcd */ { NULL
, NULL
, 0 },
1187 /* 0xce */ { NULL
, NULL
, 0 },
1188 /* 0xcf */ { NULL
, NULL
, 0 },
1189 /* 0xd0 */ { "SMBsends",reply_sends
,AS_GUEST
},
1190 /* 0xd1 */ { "SMBsendb", NULL
,AS_GUEST
},
1191 /* 0xd2 */ { "SMBfwdname", NULL
,AS_GUEST
},
1192 /* 0xd3 */ { "SMBcancelf", NULL
,AS_GUEST
},
1193 /* 0xd4 */ { "SMBgetmac", NULL
,AS_GUEST
},
1194 /* 0xd5 */ { "SMBsendstrt",reply_sendstrt
,AS_GUEST
},
1195 /* 0xd6 */ { "SMBsendend",reply_sendend
,AS_GUEST
},
1196 /* 0xd7 */ { "SMBsendtxt",reply_sendtxt
,AS_GUEST
},
1197 /* 0xd8 */ { NULL
, NULL
, 0 },
1198 /* 0xd9 */ { NULL
, NULL
, 0 },
1199 /* 0xda */ { NULL
, NULL
, 0 },
1200 /* 0xdb */ { NULL
, NULL
, 0 },
1201 /* 0xdc */ { NULL
, NULL
, 0 },
1202 /* 0xdd */ { NULL
, NULL
, 0 },
1203 /* 0xde */ { NULL
, NULL
, 0 },
1204 /* 0xdf */ { NULL
, NULL
, 0 },
1205 /* 0xe0 */ { NULL
, NULL
, 0 },
1206 /* 0xe1 */ { NULL
, NULL
, 0 },
1207 /* 0xe2 */ { NULL
, NULL
, 0 },
1208 /* 0xe3 */ { NULL
, NULL
, 0 },
1209 /* 0xe4 */ { NULL
, NULL
, 0 },
1210 /* 0xe5 */ { NULL
, NULL
, 0 },
1211 /* 0xe6 */ { NULL
, NULL
, 0 },
1212 /* 0xe7 */ { NULL
, NULL
, 0 },
1213 /* 0xe8 */ { NULL
, NULL
, 0 },
1214 /* 0xe9 */ { NULL
, NULL
, 0 },
1215 /* 0xea */ { NULL
, NULL
, 0 },
1216 /* 0xeb */ { NULL
, NULL
, 0 },
1217 /* 0xec */ { NULL
, NULL
, 0 },
1218 /* 0xed */ { NULL
, NULL
, 0 },
1219 /* 0xee */ { NULL
, NULL
, 0 },
1220 /* 0xef */ { NULL
, NULL
, 0 },
1221 /* 0xf0 */ { NULL
, NULL
, 0 },
1222 /* 0xf1 */ { NULL
, NULL
, 0 },
1223 /* 0xf2 */ { NULL
, NULL
, 0 },
1224 /* 0xf3 */ { NULL
, NULL
, 0 },
1225 /* 0xf4 */ { NULL
, NULL
, 0 },
1226 /* 0xf5 */ { NULL
, NULL
, 0 },
1227 /* 0xf6 */ { NULL
, NULL
, 0 },
1228 /* 0xf7 */ { NULL
, NULL
, 0 },
1229 /* 0xf8 */ { NULL
, NULL
, 0 },
1230 /* 0xf9 */ { NULL
, NULL
, 0 },
1231 /* 0xfa */ { NULL
, NULL
, 0 },
1232 /* 0xfb */ { NULL
, NULL
, 0 },
1233 /* 0xfc */ { NULL
, NULL
, 0 },
1234 /* 0xfd */ { NULL
, NULL
, 0 },
1235 /* 0xfe */ { NULL
, NULL
, 0 },
1236 /* 0xff */ { NULL
, NULL
, 0 }
1240 /*******************************************************************
1241 allocate and initialize a reply packet
1242 ********************************************************************/
1244 bool create_outbuf(TALLOC_CTX
*mem_ctx
, const char *inbuf
, char **outbuf
,
1245 uint8_t num_words
, uint32_t num_bytes
)
1248 * Protect against integer wrap
1250 if ((num_bytes
> 0xffffff)
1251 || ((num_bytes
+ smb_size
+ num_words
*2) > 0xffffff)) {
1253 if (asprintf(&msg
, "num_bytes too large: %u",
1254 (unsigned)num_bytes
) == -1) {
1255 msg
= CONST_DISCARD(char *, "num_bytes too large");
1260 *outbuf
= TALLOC_ARRAY(mem_ctx
, char,
1261 smb_size
+ num_words
*2 + num_bytes
);
1262 if (*outbuf
== NULL
) {
1266 construct_reply_common(inbuf
, *outbuf
);
1267 srv_set_message(*outbuf
, num_words
, num_bytes
, false);
1269 * Zero out the word area, the caller has to take care of the bcc area
1272 if (num_words
!= 0) {
1273 memset(*outbuf
+ smb_vwv0
, 0, num_words
*2);
1279 void reply_outbuf(struct smb_request
*req
, uint8 num_words
, uint32 num_bytes
)
1282 if (!create_outbuf(req
, (char *)req
->inbuf
, &outbuf
, num_words
,
1284 smb_panic("could not allocate output buffer\n");
1286 req
->outbuf
= (uint8_t *)outbuf
;
1290 /*******************************************************************
1291 Dump a packet to a file.
1292 ********************************************************************/
1294 static void smb_dump(const char *name
, int type
, const char *data
, ssize_t len
)
1298 if (DEBUGLEVEL
< 50) {
1302 if (len
< 4) len
= smb_len(data
)+4;
1303 for (i
=1;i
<100;i
++) {
1304 if (asprintf(&fname
, "/tmp/%s.%d.%s", name
, i
,
1305 type
? "req" : "resp") == -1) {
1308 fd
= open(fname
, O_WRONLY
|O_CREAT
|O_EXCL
, 0644);
1309 if (fd
!= -1 || errno
!= EEXIST
) break;
1312 ssize_t ret
= write(fd
, data
, len
);
1314 DEBUG(0,("smb_dump: problem: write returned %d\n", (int)ret
));
1316 DEBUG(0,("created %s len %lu\n", fname
, (unsigned long)len
));
1321 /****************************************************************************
1322 Prepare everything for calling the actual request function, and potentially
1323 call the request function via the "new" interface.
1325 Return False if the "legacy" function needs to be called, everything is
1328 Return True if we're done.
1330 I know this API sucks, but it is the one with the least code change I could
1332 ****************************************************************************/
1334 static connection_struct
*switch_message(uint8 type
, struct smb_request
*req
, int size
)
1338 connection_struct
*conn
= NULL
;
1340 static uint16 last_session_tag
= UID_FIELD_INVALID
;
1344 /* Make sure this is an SMB packet. smb_size contains NetBIOS header
1345 * so subtract 4 from it. */
1346 if (!valid_smb_header(req
->inbuf
)
1347 || (size
< (smb_size
- 4))) {
1348 DEBUG(2,("Non-SMB packet of length %d. Terminating server\n",
1349 smb_len(req
->inbuf
)));
1350 exit_server_cleanly("Non-SMB packet");
1353 if (smb_messages
[type
].fn_new
== NULL
) {
1354 DEBUG(0,("Unknown message type %d!\n",type
));
1355 smb_dump("Unknown", 1, (char *)req
->inbuf
, size
);
1356 reply_unknown_new(req
, type
);
1360 flags
= smb_messages
[type
].flags
;
1362 /* In share mode security we must ignore the vuid. */
1363 session_tag
= (lp_security() == SEC_SHARE
)
1364 ? UID_FIELD_INVALID
: req
->vuid
;
1367 DEBUG(3,("switch message %s (pid %d) conn 0x%lx\n", smb_fn_name(type
),
1368 (int)sys_getpid(), (unsigned long)conn
));
1370 smb_dump(smb_fn_name(type
), 1, (char *)req
->inbuf
, size
);
1372 /* Ensure this value is replaced in the incoming packet. */
1373 SSVAL(req
->inbuf
,smb_uid
,session_tag
);
1376 * Ensure the correct username is in current_user_info. This is a
1377 * really ugly bugfix for problems with multiple session_setup_and_X's
1378 * being done and allowing %U and %G substitutions to work correctly.
1379 * There is a reason this code is done here, don't move it unless you
1380 * know what you're doing... :-).
1384 if (session_tag
!= last_session_tag
) {
1385 user_struct
*vuser
= NULL
;
1387 last_session_tag
= session_tag
;
1388 if(session_tag
!= UID_FIELD_INVALID
) {
1389 vuser
= get_valid_user_struct(session_tag
);
1391 set_current_user_info(
1392 vuser
->server_info
->sanitized_username
,
1393 vuser
->server_info
->unix_name
,
1394 pdb_get_fullname(vuser
->server_info
1396 pdb_get_domain(vuser
->server_info
1402 /* Does this call need to be run as the connected user? */
1403 if (flags
& AS_USER
) {
1405 /* Does this call need a valid tree connection? */
1408 * Amazingly, the error code depends on the command
1411 if (type
== SMBntcreateX
) {
1412 reply_nterror(req
, NT_STATUS_INVALID_HANDLE
);
1414 reply_doserror(req
, ERRSRV
, ERRinvnid
);
1419 if (!change_to_user(conn
,session_tag
)) {
1420 reply_nterror(req
, NT_STATUS_DOS(ERRSRV
, ERRbaduid
));
1424 /* All NEED_WRITE and CAN_IPC flags must also have AS_USER. */
1426 /* Does it need write permission? */
1427 if ((flags
& NEED_WRITE
) && !CAN_WRITE(conn
)) {
1428 reply_nterror(req
, NT_STATUS_MEDIA_WRITE_PROTECTED
);
1432 /* IPC services are limited */
1433 if (IS_IPC(conn
) && !(flags
& CAN_IPC
)) {
1434 reply_doserror(req
, ERRSRV
,ERRaccess
);
1438 /* This call needs to be run as root */
1439 change_to_root_user();
1442 /* load service specific parameters */
1444 if (req
->encrypted
) {
1445 conn
->encrypted_tid
= true;
1446 /* encrypted required from now on. */
1447 conn
->encrypt_level
= Required
;
1448 } else if (ENCRYPTION_REQUIRED(conn
)) {
1449 uint8 com
= CVAL(req
->inbuf
,smb_com
);
1450 if (com
!= SMBtrans2
&& com
!= SMBtranss2
) {
1451 exit_server_cleanly("encryption required "
1457 if (!set_current_service(conn
,SVAL(req
->inbuf
,smb_flg
),
1458 (flags
& (AS_USER
|DO_CHDIR
)
1460 reply_doserror(req
, ERRSRV
, ERRaccess
);
1463 conn
->num_smb_operations
++;
1466 /* does this protocol need to be run as guest? */
1467 if ((flags
& AS_GUEST
)
1468 && (!change_to_guest() ||
1469 !check_access(smbd_server_fd(), lp_hostsallow(-1),
1470 lp_hostsdeny(-1)))) {
1471 reply_doserror(req
, ERRSRV
, ERRaccess
);
1475 smb_messages
[type
].fn_new(req
);
1479 /****************************************************************************
1480 Construct a reply to the incoming packet.
1481 ****************************************************************************/
1483 static void construct_reply(char *inbuf
, int size
, size_t unread_bytes
, bool encrypted
)
1485 uint8 type
= CVAL(inbuf
,smb_com
);
1486 connection_struct
*conn
;
1487 struct smb_request
*req
;
1491 if (!(req
= talloc(talloc_tos(), struct smb_request
))) {
1492 smb_panic("could not allocate smb_request");
1494 init_smb_request(req
, (uint8
*)inbuf
, unread_bytes
, encrypted
);
1496 conn
= switch_message(type
, req
, size
);
1498 if (req
->unread_bytes
) {
1499 /* writeX failed. drain socket. */
1500 if (drain_socket(smbd_server_fd(), req
->unread_bytes
) !=
1501 req
->unread_bytes
) {
1502 smb_panic("failed to drain pending bytes");
1504 req
->unread_bytes
= 0;
1507 if (req
->outbuf
== NULL
) {
1511 if (CVAL(req
->outbuf
,0) == 0) {
1512 show_msg((char *)req
->outbuf
);
1515 if (!srv_send_smb(smbd_server_fd(),
1516 (char *)req
->outbuf
,
1517 IS_CONN_ENCRYPTED(conn
)||req
->encrypted
)) {
1518 exit_server_cleanly("construct_reply: srv_send_smb failed.");
1526 /****************************************************************************
1527 Process an smb from the client
1528 ****************************************************************************/
1530 static void process_smb(char *inbuf
, size_t nread
, size_t unread_bytes
, bool encrypted
)
1532 static int trans_num
;
1533 int msg_type
= CVAL(inbuf
,0);
1535 DO_PROFILE_INC(smb_count
);
1537 if (trans_num
== 0) {
1538 char addr
[INET6_ADDRSTRLEN
];
1540 /* on the first packet, check the global hosts allow/ hosts
1541 deny parameters before doing any parsing of the packet
1542 passed to us by the client. This prevents attacks on our
1543 parsing code from hosts not in the hosts allow list */
1545 if (!check_access(smbd_server_fd(), lp_hostsallow(-1),
1546 lp_hostsdeny(-1))) {
1547 /* send a negative session response "not listening on calling name" */
1548 static unsigned char buf
[5] = {0x83, 0, 0, 1, 0x81};
1549 DEBUG( 1, ( "Connection denied from %s\n",
1550 client_addr(get_client_fd(),addr
,sizeof(addr
)) ) );
1551 (void)srv_send_smb(smbd_server_fd(),(char *)buf
,false);
1552 exit_server_cleanly("connection denied");
1556 DEBUG( 6, ( "got message type 0x%x of len 0x%x\n", msg_type
,
1558 DEBUG( 3, ( "Transaction %d of length %d (%u toread)\n", trans_num
,
1560 (unsigned int)unread_bytes
));
1562 if (msg_type
!= 0) {
1564 * NetBIOS session request, keepalive, etc.
1566 reply_special(inbuf
);
1572 construct_reply(inbuf
,nread
,unread_bytes
,encrypted
);
1577 /****************************************************************************
1578 Return a string containing the function name of a SMB command.
1579 ****************************************************************************/
1581 const char *smb_fn_name(int type
)
1583 const char *unknown_name
= "SMBunknown";
1585 if (smb_messages
[type
].name
== NULL
)
1586 return(unknown_name
);
1588 return(smb_messages
[type
].name
);
1591 /****************************************************************************
1592 Helper functions for contruct_reply.
1593 ****************************************************************************/
1595 static uint32 common_flags2
= FLAGS2_LONG_PATH_COMPONENTS
|FLAGS2_32_BIT_ERROR_CODES
;
1597 void add_to_common_flags2(uint32 v
)
1602 void remove_from_common_flags2(uint32 v
)
1604 common_flags2
&= ~v
;
1607 void construct_reply_common(const char *inbuf
, char *outbuf
)
1609 srv_set_message(outbuf
,0,0,false);
1611 SCVAL(outbuf
,smb_com
,CVAL(inbuf
,smb_com
));
1612 SIVAL(outbuf
,smb_rcls
,0);
1613 SCVAL(outbuf
,smb_flg
, FLAG_REPLY
| (CVAL(inbuf
,smb_flg
) & FLAG_CASELESS_PATHNAMES
));
1614 SSVAL(outbuf
,smb_flg2
,
1615 (SVAL(inbuf
,smb_flg2
) & FLAGS2_UNICODE_STRINGS
) |
1617 memset(outbuf
+smb_pidhigh
,'\0',(smb_tid
-smb_pidhigh
));
1619 SSVAL(outbuf
,smb_tid
,SVAL(inbuf
,smb_tid
));
1620 SSVAL(outbuf
,smb_pid
,SVAL(inbuf
,smb_pid
));
1621 SSVAL(outbuf
,smb_uid
,SVAL(inbuf
,smb_uid
));
1622 SSVAL(outbuf
,smb_mid
,SVAL(inbuf
,smb_mid
));
1625 /****************************************************************************
1626 Construct a chained reply and add it to the already made reply
1627 ****************************************************************************/
1629 void chain_reply(struct smb_request
*req
)
1631 static char *orig_inbuf
;
1634 * Dirty little const_discard: We mess with req->inbuf, which is
1635 * declared as const. If maybe at some point this routine gets
1636 * rewritten, this const_discard could go away.
1638 char *inbuf
= CONST_DISCARD(char *, req
->inbuf
);
1639 int size
= smb_len(req
->inbuf
)+4;
1641 int smb_com1
, smb_com2
= CVAL(inbuf
,smb_vwv0
);
1642 unsigned smb_off2
= SVAL(inbuf
,smb_vwv1
);
1646 char inbuf_saved
[smb_wct
];
1647 char *outbuf
= (char *)req
->outbuf
;
1648 size_t outsize
= smb_len(outbuf
) + 4;
1649 size_t outsize_padded
;
1651 size_t ofs
, to_move
;
1653 struct smb_request
*req2
;
1654 size_t caller_outputlen
;
1655 char *caller_output
;
1657 /* Maybe its not chained, or it's an error packet. */
1658 if (smb_com2
== 0xFF || SVAL(outbuf
,smb_rcls
) != 0) {
1659 SCVAL(outbuf
,smb_vwv0
,0xFF);
1663 if (chain_size
== 0) {
1664 /* this is the first part of the chain */
1669 * We need to save the output the caller added to the chain so that we
1670 * can splice it into the final output buffer later.
1673 caller_outputlen
= outsize
- smb_wct
;
1675 caller_output
= (char *)memdup(outbuf
+ smb_wct
, caller_outputlen
);
1677 if (caller_output
== NULL
) {
1678 /* TODO: NT_STATUS_NO_MEMORY */
1679 smb_panic("could not dup outbuf");
1683 * The original Win95 redirector dies on a reply to
1684 * a lockingX and read chain unless the chain reply is
1685 * 4 byte aligned. JRA.
1688 outsize_padded
= (outsize
+ 3) & ~3;
1689 padding
= outsize_padded
- outsize
;
1692 * remember how much the caller added to the chain, only counting
1693 * stuff after the parameter words
1695 chain_size
+= (outsize_padded
- smb_wct
);
1698 * work out pointers into the original packets. The
1699 * headers on these need to be filled in
1701 inbuf2
= orig_inbuf
+ smb_off2
+ 4 - smb_wct
;
1703 /* remember the original command type */
1704 smb_com1
= CVAL(orig_inbuf
,smb_com
);
1706 /* save the data which will be overwritten by the new headers */
1707 memcpy(inbuf_saved
,inbuf2
,smb_wct
);
1709 /* give the new packet the same header as the last part of the SMB */
1710 memmove(inbuf2
,inbuf
,smb_wct
);
1712 /* create the in buffer */
1713 SCVAL(inbuf2
,smb_com
,smb_com2
);
1715 /* work out the new size for the in buffer. */
1716 new_size
= size
- (inbuf2
- inbuf
);
1718 DEBUG(0,("chain_reply: chain packet size incorrect "
1719 "(orig size = %d, offset = %d)\n",
1720 size
, (int)(inbuf2
- inbuf
) ));
1721 exit_server_cleanly("Bad chained packet");
1725 /* And set it in the header. */
1726 smb_setlen(inbuf2
, new_size
- 4);
1728 DEBUG(3,("Chained message\n"));
1731 if (!(req2
= talloc(talloc_tos(), struct smb_request
))) {
1732 smb_panic("could not allocate smb_request");
1734 init_smb_request(req2
, (uint8
*)inbuf2
,0, req
->encrypted
);
1735 req2
->chain_fsp
= req
->chain_fsp
;
1737 /* process the request */
1738 switch_message(smb_com2
, req2
, new_size
);
1741 * We don't accept deferred operations in chained requests.
1743 SMB_ASSERT(req2
->outbuf
!= NULL
);
1744 outsize2
= smb_len(req2
->outbuf
)+4;
1747 * Move away the new command output so that caller_output fits in,
1748 * copy in the caller_output saved above.
1751 SMB_ASSERT(outsize_padded
>= smb_wct
);
1754 * "ofs" is the space we need for caller_output. Equal to
1755 * caller_outputlen plus the padding.
1758 ofs
= outsize_padded
- smb_wct
;
1761 * "to_move" is the amount of bytes the secondary routine gave us
1764 to_move
= outsize2
- smb_wct
;
1766 if (to_move
+ ofs
+ smb_wct
+ chain_size
> max_send
) {
1767 smb_panic("replies too large -- would have to cut");
1771 * In the "new" API "outbuf" is allocated via reply_outbuf, just for
1772 * the first request in the chain. So we have to re-allocate it. In
1773 * the "old" API the only outbuf ever used is the global OutBuffer
1774 * which is always large enough.
1777 outbuf
= TALLOC_REALLOC_ARRAY(NULL
, outbuf
, char,
1778 to_move
+ ofs
+ smb_wct
);
1779 if (outbuf
== NULL
) {
1780 smb_panic("could not realloc outbuf");
1783 req
->outbuf
= (uint8
*)outbuf
;
1785 memmove(outbuf
+ smb_wct
+ ofs
, req2
->outbuf
+ smb_wct
, to_move
);
1786 memcpy(outbuf
+ smb_wct
, caller_output
, caller_outputlen
);
1789 * copy the new reply header over the old one but preserve the smb_com
1792 memmove(outbuf
, req2
->outbuf
, smb_wct
);
1793 SCVAL(outbuf
, smb_com
, smb_com1
);
1796 * We've just copied in the whole "wct" area from the secondary
1797 * function. Fix up the chaining: com2 and the offset need to be
1801 SCVAL(outbuf
, smb_vwv0
, smb_com2
);
1802 SSVAL(outbuf
, smb_vwv1
, chain_size
+ smb_wct
- 4);
1807 * Due to padding we have some uninitialized bytes after the
1811 memset(outbuf
+ outsize
, 0, padding
);
1814 smb_setlen(outbuf
, outsize2
+ caller_outputlen
+ padding
- 4);
1817 * restore the saved data, being careful not to overwrite any data
1818 * from the reply header
1820 memcpy(inbuf2
,inbuf_saved
,smb_wct
);
1822 SAFE_FREE(caller_output
);
1826 * Reset the chain_size for our caller's offset calculations
1829 chain_size
-= (outsize_padded
- smb_wct
);
1834 /****************************************************************************
1835 Check if services need reloading.
1836 ****************************************************************************/
1838 void check_reload(time_t t
)
1840 static pid_t mypid
= 0;
1841 static time_t last_smb_conf_reload_time
= 0;
1842 static time_t last_printer_reload_time
= 0;
1843 time_t printcap_cache_time
= (time_t)lp_printcap_cache_time();
1845 if(last_smb_conf_reload_time
== 0) {
1846 last_smb_conf_reload_time
= t
;
1847 /* Our printing subsystem might not be ready at smbd start up.
1848 Then no printer is available till the first printers check
1849 is performed. A lower initial interval circumvents this. */
1850 if ( printcap_cache_time
> 60 )
1851 last_printer_reload_time
= t
- printcap_cache_time
+ 60;
1853 last_printer_reload_time
= t
;
1856 if (mypid
!= getpid()) { /* First time or fork happened meanwhile */
1857 /* randomize over 60 second the printcap reload to avoid all
1858 * process hitting cupsd at the same time */
1859 int time_range
= 60;
1861 last_printer_reload_time
+= random() % time_range
;
1865 if (reload_after_sighup
|| (t
>= last_smb_conf_reload_time
+SMBD_RELOAD_CHECK
)) {
1866 reload_services(True
);
1867 reload_after_sighup
= False
;
1868 last_smb_conf_reload_time
= t
;
1871 /* 'printcap cache time = 0' disable the feature */
1873 if ( printcap_cache_time
!= 0 )
1875 /* see if it's time to reload or if the clock has been set back */
1877 if ( (t
>= last_printer_reload_time
+printcap_cache_time
)
1878 || (t
-last_printer_reload_time
< 0) )
1880 DEBUG( 3,( "Printcap cache time expired.\n"));
1882 last_printer_reload_time
= t
;
1887 /****************************************************************************
1888 Process commands from the client
1889 ****************************************************************************/
1891 void smbd_process(void)
1893 unsigned int num_smbs
= 0;
1894 size_t unread_bytes
= 0;
1896 max_recv
= MIN(lp_maxxmit(),BUFFER_SIZE
);
1901 size_t inbuf_len
= 0;
1902 bool encrypted
= false;
1903 TALLOC_CTX
*frame
= talloc_stackframe_pool(8192);
1907 run_events(smbd_event_context(), 0, NULL
, NULL
);
1909 status
= receive_message_or_smb(
1910 talloc_tos(), &inbuf
, &inbuf_len
,
1911 &unread_bytes
, &encrypted
);
1913 if (!NT_STATUS_IS_OK(status
)) {
1914 DEBUG(3, ("receive_message_or_smb failed: %s, "
1915 "exiting\n", nt_errstr(status
)));
1919 process_smb(inbuf
, inbuf_len
, unread_bytes
, encrypted
);
1925 /* The timeout_processing function isn't run nearly
1926 often enough to implement 'max log size' without
1927 overrunning the size of the file by many megabytes.
1928 This is especially true if we are running at debug
1929 level 10. Checking every 50 SMBs is a nice
1930 tradeoff of performance vs log file size overrun. */
1932 if ((num_smbs
% 50) == 0 && need_to_check_log_size()) {
1933 change_to_root_user();