2 Unix SMB/CIFS implementation.
3 process incoming packets - main loop
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Volker Lendecke 2005
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 2 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, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 extern struct auth_context
*negprot_global_auth_context
;
27 extern int smb_echo_count
;
29 static char *InBuffer
= NULL
;
30 static char *OutBuffer
= NULL
;
31 static char *current_inbuf
= NULL
;
34 * Size of data we can send to client. Set
35 * by the client for all protocols above CORE.
36 * Set by us for CORE protocol.
38 int max_send
= BUFFER_SIZE
;
40 * Size of the data we can receive. Set by us.
41 * Can be modified by the max xmit parameter.
43 int max_recv
= BUFFER_SIZE
;
45 extern int last_message
;
46 extern int smb_read_error
;
47 SIG_ATOMIC_T reload_after_sighup
= 0;
48 SIG_ATOMIC_T got_sig_term
= 0;
49 extern BOOL global_machine_password_needs_changing
;
52 /****************************************************************************
53 Function to return the current request mid from Inbuffer.
54 ****************************************************************************/
56 uint16
get_current_mid(void)
58 return SVAL(InBuffer
,smb_mid
);
61 /****************************************************************************
62 structure to hold a linked list of queued messages.
64 ****************************************************************************/
66 static struct pending_message_list
*deferred_open_queue
;
68 /****************************************************************************
69 Function to push a message onto the tail of a linked list of smb messages ready
71 ****************************************************************************/
73 static BOOL
push_queued_message(char *buf
, int msg_len
,
74 struct timeval request_time
,
75 struct timeval end_time
,
76 char *private_data
, size_t private_len
)
78 struct pending_message_list
*msg
;
80 msg
= TALLOC_ZERO_P(NULL
, struct pending_message_list
);
83 DEBUG(0,("push_message: malloc fail (1)\n"));
87 msg
->buf
= data_blob_talloc(msg
, buf
, msg_len
);
88 if(msg
->buf
.data
== NULL
) {
89 DEBUG(0,("push_message: malloc fail (2)\n"));
94 msg
->request_time
= request_time
;
95 msg
->end_time
= end_time
;
98 msg
->private_data
= data_blob_talloc(msg
, private_data
,
100 if (msg
->private_data
.data
== NULL
) {
101 DEBUG(0,("push_message: malloc fail (3)\n"));
107 DLIST_ADD_END(deferred_open_queue
, msg
, struct pending_message_list
*);
109 DEBUG(10,("push_message: pushed message length %u on "
110 "deferred_open_queue\n", (unsigned int)msg_len
));
115 /****************************************************************************
116 Function to delete a sharing violation open message by mid.
117 ****************************************************************************/
119 void remove_deferred_open_smb_message(uint16 mid
)
121 struct pending_message_list
*pml
;
123 for (pml
= deferred_open_queue
; pml
; pml
= pml
->next
) {
124 if (mid
== SVAL(pml
->buf
.data
,smb_mid
)) {
125 DEBUG(10,("remove_sharing_violation_open_smb_message: "
126 "deleting mid %u len %u\n",
128 (unsigned int)pml
->buf
.length
));
129 DLIST_REMOVE(deferred_open_queue
, pml
);
136 /****************************************************************************
137 Move a sharing violation open retry message to the front of the list and
138 schedule it for immediate processing.
139 ****************************************************************************/
141 void schedule_deferred_open_smb_message(uint16 mid
)
143 struct pending_message_list
*pml
;
146 for (pml
= deferred_open_queue
; pml
; pml
= pml
->next
) {
147 uint16 msg_mid
= SVAL(pml
->buf
.data
,smb_mid
);
148 DEBUG(10,("schedule_deferred_open_smb_message: [%d] msg_mid = %u\n", i
++,
149 (unsigned int)msg_mid
));
150 if (mid
== msg_mid
) {
151 DEBUG(10,("schedule_deferred_open_smb_message: scheduling mid %u\n",
153 pml
->end_time
.tv_sec
= 0;
154 pml
->end_time
.tv_usec
= 0;
155 DLIST_PROMOTE(deferred_open_queue
, pml
);
160 DEBUG(10,("schedule_deferred_open_smb_message: failed to find message mid %u\n",
164 /****************************************************************************
165 Return true if this mid is on the deferred queue.
166 ****************************************************************************/
168 BOOL
open_was_deferred(uint16 mid
)
170 struct pending_message_list
*pml
;
172 for (pml
= deferred_open_queue
; pml
; pml
= pml
->next
) {
173 if (SVAL(pml
->buf
.data
,smb_mid
) == mid
) {
180 /****************************************************************************
181 Return the message queued by this mid.
182 ****************************************************************************/
184 struct pending_message_list
*get_open_deferred_message(uint16 mid
)
186 struct pending_message_list
*pml
;
188 for (pml
= deferred_open_queue
; pml
; pml
= pml
->next
) {
189 if (SVAL(pml
->buf
.data
,smb_mid
) == mid
) {
196 /****************************************************************************
197 Function to push a deferred open smb message onto a linked list of local smb
198 messages ready for processing.
199 ****************************************************************************/
201 BOOL
push_deferred_smb_message(uint16 mid
,
202 struct timeval request_time
,
203 struct timeval timeout
,
204 char *private_data
, size_t priv_len
)
206 struct timeval end_time
;
208 end_time
= timeval_sum(&request_time
, &timeout
);
210 DEBUG(10,("push_deferred_open_smb_message: pushing message len %u mid %u "
211 "timeout time [%u.%06u]\n",
212 (unsigned int) smb_len(current_inbuf
)+4, (unsigned int)mid
,
213 (unsigned int)end_time
.tv_sec
,
214 (unsigned int)end_time
.tv_usec
));
216 return push_queued_message(current_inbuf
, smb_len(current_inbuf
)+4,
217 request_time
, end_time
,
218 private_data
, priv_len
);
222 struct timed_event
*te
;
223 struct timeval interval
;
224 BOOL (*handler
)(const struct timeval
*now
, void *private_data
);
228 static void idle_event_handler(struct timed_event
*te
,
229 const struct timeval
*now
,
232 struct idle_event
*event
=
233 talloc_get_type_abort(private_data
, struct idle_event
);
235 TALLOC_FREE(event
->te
);
237 if (!event
->handler(now
, event
->private_data
)) {
238 /* Don't repeat, delete ourselves */
243 event
->te
= add_timed_event(event
, timeval_sum(now
, &event
->interval
),
244 "idle_event_handler",
245 idle_event_handler
, event
);
247 /* We can't do much but fail here. */
248 SMB_ASSERT(event
->te
!= NULL
);
251 struct idle_event
*add_idle_event(TALLOC_CTX
*mem_ctx
,
252 struct timeval interval
,
253 BOOL (*handler
)(const struct timeval
*now
,
257 struct idle_event
*result
;
258 struct timeval now
= timeval_current();
260 result
= TALLOC_P(mem_ctx
, struct idle_event
);
261 if (result
== NULL
) {
262 DEBUG(0, ("talloc failed\n"));
266 result
->interval
= interval
;
267 result
->handler
= handler
;
268 result
->private_data
= private_data
;
270 result
->te
= add_timed_event(result
, timeval_sum(&now
, &interval
),
271 "idle_event_handler",
272 idle_event_handler
, result
);
273 if (result
->te
== NULL
) {
274 DEBUG(0, ("add_timed_event failed\n"));
282 /****************************************************************************
283 Do all async processing in here. This includes kernel oplock messages, change
285 ****************************************************************************/
287 static void async_processing(fd_set
*pfds
)
289 DEBUG(10,("async_processing: Doing async processing.\n"));
293 process_kernel_oplocks(pfds
);
295 /* Do the aio check again after receive_local_message as it does a
296 select and may have eaten our signal. */
297 /* Is this till true? -- vl */
301 exit_server_cleanly("termination signal");
304 /* check for async change notify events */
305 process_pending_change_notify_queue(0);
307 /* check for sighup processing */
308 if (reload_after_sighup
) {
309 change_to_root_user();
310 DEBUG(1,("Reloading services after SIGHUP\n"));
311 reload_services(False
);
312 reload_after_sighup
= 0;
316 /****************************************************************************
317 Add a fd to the set we will be select(2)ing on.
318 ****************************************************************************/
320 static int select_on_fd(int fd
, int maxfd
, fd_set
*fds
)
324 maxfd
= MAX(maxfd
, fd
);
330 /****************************************************************************
331 Do a select on an two fd's - with timeout.
333 If a local udp message has been pushed onto the
334 queue (this can only happen during oplock break
335 processing) call async_processing()
337 If a pending smb message has been pushed onto the
338 queue (this can only happen during oplock break
339 processing) return this next.
341 If the first smbfd is ready then read an smb from it.
342 if the second (loopback UDP) fd is ready then read a message
343 from it and setup the buffer header to identify the length
345 Returns False on timeout or error.
348 The timeout is in milliseconds
349 ****************************************************************************/
351 static BOOL
receive_message_or_smb(char *buffer
, int buffer_len
, int timeout
)
363 to
.tv_sec
= timeout
/ 1000;
364 to
.tv_usec
= (timeout
% 1000) * 1000;
366 to
.tv_sec
= SMBD_SELECT_TIMEOUT
;
371 * Note that this call must be before processing any SMB
372 * messages as we need to synchronously process any messages
373 * we may have sent to ourselves from the previous SMB.
378 * Check to see if we already have a message on the deferred open queue
379 * and it's time to schedule.
381 if(deferred_open_queue
!= NULL
) {
382 BOOL pop_message
= False
;
383 struct pending_message_list
*msg
= deferred_open_queue
;
385 if (timeval_is_zero(&msg
->end_time
)) {
392 tdif
= usec_time_diff(&msg
->end_time
, &tv
);
394 /* Timed out. Schedule...*/
396 DEBUG(10,("receive_message_or_smb: queued message timed out.\n"));
398 /* Make a more accurate select timeout. */
399 to
.tv_sec
= tdif
/ 1000000;
400 to
.tv_usec
= tdif
% 1000000;
401 DEBUG(10,("receive_message_or_smb: select with timeout of [%u.%06u]\n",
402 (unsigned int)to
.tv_sec
, (unsigned int)to
.tv_usec
));
407 memcpy(buffer
, msg
->buf
.data
, MIN(buffer_len
, msg
->buf
.length
));
409 /* We leave this message on the queue so the open code can
410 know this is a retry. */
411 DEBUG(5,("receive_message_or_smb: returning deferred open smb message.\n"));
417 * Setup the select read fd set.
423 * Ensure we process oplock break messages by preference.
424 * We have to do this before the select, after the select
425 * and if the select returns EINTR. This is due to the fact
426 * that the selects called from async_processing can eat an EINTR
427 * caused by a signal (we can't take the break message there).
428 * This is hideously complex - *MUST* be simplified for 3.0 ! JRA.
431 if (oplock_message_waiting(&fds
)) {
432 DEBUG(10,("receive_message_or_smb: oplock_message is waiting.\n"));
433 async_processing(&fds
);
435 * After async processing we must go and do the select again, as
436 * the state of the flag in fds for the server file descriptor is
437 * indeterminate - we may have done I/O on it in the oplock processing. JRA.
443 * Are there any timed events waiting ? If so, ensure we don't
444 * select for longer than it would take to wait for them.
449 struct timeval
*tp
= get_timed_events_timeout(&tmp
);
452 to
= timeval_min(&to
, tp
);
453 if (timeval_is_zero(&to
)) {
454 /* Process a timed event now... */
462 START_PROFILE(smbd_idle
);
464 maxfd
= select_on_fd(smbd_server_fd(), maxfd
, &fds
);
465 maxfd
= select_on_fd(change_notify_fd(), maxfd
, &fds
);
466 maxfd
= select_on_fd(oplock_notify_fd(), maxfd
, &fds
);
468 selrtn
= sys_select(maxfd
+1,&fds
,NULL
,NULL
,&to
);
471 END_PROFILE(smbd_idle
);
475 /* if we get EINTR then maybe we have received an oplock
476 signal - treat this as select returning 1. This is ugly, but
477 is the best we can do until the oplock code knows more about
479 if (selrtn
== -1 && errno
== EINTR
) {
480 async_processing(&fds
);
482 * After async processing we must go and do the select again, as
483 * the state of the flag in fds for the server file descriptor is
484 * indeterminate - we may have done I/O on it in the oplock processing. JRA.
491 /* something is wrong. Maybe the socket is dead? */
492 smb_read_error
= READ_ERROR
;
496 /* Did we timeout ? */
498 smb_read_error
= READ_TIMEOUT
;
503 * Ensure we process oplock break messages by preference.
504 * This is IMPORTANT ! Otherwise we can starve other processes
505 * sending us an oplock break message. JRA.
508 if (oplock_message_waiting(&fds
)) {
509 async_processing(&fds
);
511 * After async processing we must go and do the select again, as
512 * the state of the flag in fds for the server file descriptor is
513 * indeterminate - we may have done I/O on it in the oplock processing. JRA.
518 return receive_smb(smbd_server_fd(), buffer
, 0);
522 * Only allow 5 outstanding trans requests. We're allocating memory, so
526 NTSTATUS
allow_new_trans(struct trans_state
*list
, int mid
)
529 for (; list
!= NULL
; list
= list
->next
) {
531 if (list
->mid
== mid
) {
532 return NT_STATUS_INVALID_PARAMETER
;
538 return NT_STATUS_INSUFFICIENT_RESOURCES
;
544 /****************************************************************************
545 We're terminating and have closed all our files/connections etc.
546 If there are any pending local messages we need to respond to them
547 before termination so that other smbds don't think we just died whilst
549 ****************************************************************************/
551 void respond_to_all_remaining_local_messages(void)
554 * Assert we have no exclusive open oplocks.
557 if(get_number_of_exclusive_open_oplocks()) {
558 DEBUG(0,("respond_to_all_remaining_local_messages: PANIC : we have %d exclusive oplocks.\n",
559 get_number_of_exclusive_open_oplocks() ));
563 process_kernel_oplocks(NULL
);
570 These flags determine some of the permissions required to do an operation
572 Note that I don't set NEED_WRITE on some write operations because they
573 are used by some brain-dead clients when printing, and I don't want to
574 force write permissions on print services.
576 #define AS_USER (1<<0)
577 #define NEED_WRITE (1<<1) /* Must be paired with AS_USER */
578 #define TIME_INIT (1<<2)
579 #define CAN_IPC (1<<3) /* Must be paired with AS_USER */
580 #define AS_GUEST (1<<5) /* Must *NOT* be paired with AS_USER */
581 #define DO_CHDIR (1<<6)
584 define a list of possible SMB messages and their corresponding
585 functions. Any message that has a NULL function is unimplemented -
586 please feel free to contribute implementations!
588 static const struct smb_message_struct
{
590 int (*fn
)(connection_struct
*conn
, char *, char *, int, int);
592 } smb_messages
[256] = {
594 /* 0x00 */ { "SMBmkdir",reply_mkdir
,AS_USER
| NEED_WRITE
},
595 /* 0x01 */ { "SMBrmdir",reply_rmdir
,AS_USER
| NEED_WRITE
},
596 /* 0x02 */ { "SMBopen",reply_open
,AS_USER
},
597 /* 0x03 */ { "SMBcreate",reply_mknew
,AS_USER
},
598 /* 0x04 */ { "SMBclose",reply_close
,AS_USER
| CAN_IPC
},
599 /* 0x05 */ { "SMBflush",reply_flush
,AS_USER
},
600 /* 0x06 */ { "SMBunlink",reply_unlink
,AS_USER
| NEED_WRITE
},
601 /* 0x07 */ { "SMBmv",reply_mv
,AS_USER
| NEED_WRITE
},
602 /* 0x08 */ { "SMBgetatr",reply_getatr
,AS_USER
},
603 /* 0x09 */ { "SMBsetatr",reply_setatr
,AS_USER
| NEED_WRITE
},
604 /* 0x0a */ { "SMBread",reply_read
,AS_USER
},
605 /* 0x0b */ { "SMBwrite",reply_write
,AS_USER
| CAN_IPC
},
606 /* 0x0c */ { "SMBlock",reply_lock
,AS_USER
},
607 /* 0x0d */ { "SMBunlock",reply_unlock
,AS_USER
},
608 /* 0x0e */ { "SMBctemp",reply_ctemp
,AS_USER
},
609 /* 0x0f */ { "SMBmknew",reply_mknew
,AS_USER
},
610 /* 0x10 */ { "SMBchkpth",reply_chkpth
,AS_USER
},
611 /* 0x11 */ { "SMBexit",reply_exit
,DO_CHDIR
},
612 /* 0x12 */ { "SMBlseek",reply_lseek
,AS_USER
},
613 /* 0x13 */ { "SMBlockread",reply_lockread
,AS_USER
},
614 /* 0x14 */ { "SMBwriteunlock",reply_writeunlock
,AS_USER
},
615 /* 0x15 */ { NULL
, NULL
, 0 },
616 /* 0x16 */ { NULL
, NULL
, 0 },
617 /* 0x17 */ { NULL
, NULL
, 0 },
618 /* 0x18 */ { NULL
, NULL
, 0 },
619 /* 0x19 */ { NULL
, NULL
, 0 },
620 /* 0x1a */ { "SMBreadbraw",reply_readbraw
,AS_USER
},
621 /* 0x1b */ { "SMBreadBmpx",reply_readbmpx
,AS_USER
},
622 /* 0x1c */ { "SMBreadBs",NULL
,0 },
623 /* 0x1d */ { "SMBwritebraw",reply_writebraw
,AS_USER
},
624 /* 0x1e */ { "SMBwriteBmpx",reply_writebmpx
,AS_USER
},
625 /* 0x1f */ { "SMBwriteBs",reply_writebs
,AS_USER
},
626 /* 0x20 */ { "SMBwritec",NULL
,0},
627 /* 0x21 */ { NULL
, NULL
, 0 },
628 /* 0x22 */ { "SMBsetattrE",reply_setattrE
,AS_USER
| NEED_WRITE
},
629 /* 0x23 */ { "SMBgetattrE",reply_getattrE
,AS_USER
},
630 /* 0x24 */ { "SMBlockingX",reply_lockingX
,AS_USER
},
631 /* 0x25 */ { "SMBtrans",reply_trans
,AS_USER
| CAN_IPC
},
632 /* 0x26 */ { "SMBtranss",reply_transs
,AS_USER
| CAN_IPC
},
633 /* 0x27 */ { "SMBioctl",reply_ioctl
,0},
634 /* 0x28 */ { "SMBioctls",NULL
,AS_USER
},
635 /* 0x29 */ { "SMBcopy",reply_copy
,AS_USER
| NEED_WRITE
},
636 /* 0x2a */ { "SMBmove",NULL
,AS_USER
| NEED_WRITE
},
637 /* 0x2b */ { "SMBecho",reply_echo
,0},
638 /* 0x2c */ { "SMBwriteclose",reply_writeclose
,AS_USER
},
639 /* 0x2d */ { "SMBopenX",reply_open_and_X
,AS_USER
| CAN_IPC
},
640 /* 0x2e */ { "SMBreadX",reply_read_and_X
,AS_USER
| CAN_IPC
},
641 /* 0x2f */ { "SMBwriteX",reply_write_and_X
,AS_USER
| CAN_IPC
},
642 /* 0x30 */ { NULL
, NULL
, 0 },
643 /* 0x31 */ { NULL
, NULL
, 0 },
644 /* 0x32 */ { "SMBtrans2", reply_trans2
, AS_USER
| CAN_IPC
},
645 /* 0x33 */ { "SMBtranss2", reply_transs2
, AS_USER
},
646 /* 0x34 */ { "SMBfindclose", reply_findclose
,AS_USER
},
647 /* 0x35 */ { "SMBfindnclose", reply_findnclose
, AS_USER
},
648 /* 0x36 */ { NULL
, NULL
, 0 },
649 /* 0x37 */ { NULL
, NULL
, 0 },
650 /* 0x38 */ { NULL
, NULL
, 0 },
651 /* 0x39 */ { NULL
, NULL
, 0 },
652 /* 0x3a */ { NULL
, NULL
, 0 },
653 /* 0x3b */ { NULL
, NULL
, 0 },
654 /* 0x3c */ { NULL
, NULL
, 0 },
655 /* 0x3d */ { NULL
, NULL
, 0 },
656 /* 0x3e */ { NULL
, NULL
, 0 },
657 /* 0x3f */ { NULL
, NULL
, 0 },
658 /* 0x40 */ { NULL
, NULL
, 0 },
659 /* 0x41 */ { NULL
, NULL
, 0 },
660 /* 0x42 */ { NULL
, NULL
, 0 },
661 /* 0x43 */ { NULL
, NULL
, 0 },
662 /* 0x44 */ { NULL
, NULL
, 0 },
663 /* 0x45 */ { NULL
, NULL
, 0 },
664 /* 0x46 */ { NULL
, NULL
, 0 },
665 /* 0x47 */ { NULL
, NULL
, 0 },
666 /* 0x48 */ { NULL
, NULL
, 0 },
667 /* 0x49 */ { NULL
, NULL
, 0 },
668 /* 0x4a */ { NULL
, NULL
, 0 },
669 /* 0x4b */ { NULL
, NULL
, 0 },
670 /* 0x4c */ { NULL
, NULL
, 0 },
671 /* 0x4d */ { NULL
, NULL
, 0 },
672 /* 0x4e */ { NULL
, NULL
, 0 },
673 /* 0x4f */ { NULL
, NULL
, 0 },
674 /* 0x50 */ { NULL
, NULL
, 0 },
675 /* 0x51 */ { NULL
, NULL
, 0 },
676 /* 0x52 */ { NULL
, NULL
, 0 },
677 /* 0x53 */ { NULL
, NULL
, 0 },
678 /* 0x54 */ { NULL
, NULL
, 0 },
679 /* 0x55 */ { NULL
, NULL
, 0 },
680 /* 0x56 */ { NULL
, NULL
, 0 },
681 /* 0x57 */ { NULL
, NULL
, 0 },
682 /* 0x58 */ { NULL
, NULL
, 0 },
683 /* 0x59 */ { NULL
, NULL
, 0 },
684 /* 0x5a */ { NULL
, NULL
, 0 },
685 /* 0x5b */ { NULL
, NULL
, 0 },
686 /* 0x5c */ { NULL
, NULL
, 0 },
687 /* 0x5d */ { NULL
, NULL
, 0 },
688 /* 0x5e */ { NULL
, NULL
, 0 },
689 /* 0x5f */ { NULL
, NULL
, 0 },
690 /* 0x60 */ { NULL
, NULL
, 0 },
691 /* 0x61 */ { NULL
, NULL
, 0 },
692 /* 0x62 */ { NULL
, NULL
, 0 },
693 /* 0x63 */ { NULL
, NULL
, 0 },
694 /* 0x64 */ { NULL
, NULL
, 0 },
695 /* 0x65 */ { NULL
, NULL
, 0 },
696 /* 0x66 */ { NULL
, NULL
, 0 },
697 /* 0x67 */ { NULL
, NULL
, 0 },
698 /* 0x68 */ { NULL
, NULL
, 0 },
699 /* 0x69 */ { NULL
, NULL
, 0 },
700 /* 0x6a */ { NULL
, NULL
, 0 },
701 /* 0x6b */ { NULL
, NULL
, 0 },
702 /* 0x6c */ { NULL
, NULL
, 0 },
703 /* 0x6d */ { NULL
, NULL
, 0 },
704 /* 0x6e */ { NULL
, NULL
, 0 },
705 /* 0x6f */ { NULL
, NULL
, 0 },
706 /* 0x70 */ { "SMBtcon",reply_tcon
,0},
707 /* 0x71 */ { "SMBtdis",reply_tdis
,DO_CHDIR
},
708 /* 0x72 */ { "SMBnegprot",reply_negprot
,0},
709 /* 0x73 */ { "SMBsesssetupX",reply_sesssetup_and_X
,0},
710 /* 0x74 */ { "SMBulogoffX", reply_ulogoffX
, 0}, /* ulogoff doesn't give a valid TID */
711 /* 0x75 */ { "SMBtconX",reply_tcon_and_X
,0},
712 /* 0x76 */ { NULL
, NULL
, 0 },
713 /* 0x77 */ { NULL
, NULL
, 0 },
714 /* 0x78 */ { NULL
, NULL
, 0 },
715 /* 0x79 */ { NULL
, NULL
, 0 },
716 /* 0x7a */ { NULL
, NULL
, 0 },
717 /* 0x7b */ { NULL
, NULL
, 0 },
718 /* 0x7c */ { NULL
, NULL
, 0 },
719 /* 0x7d */ { NULL
, NULL
, 0 },
720 /* 0x7e */ { NULL
, NULL
, 0 },
721 /* 0x7f */ { NULL
, NULL
, 0 },
722 /* 0x80 */ { "SMBdskattr",reply_dskattr
,AS_USER
},
723 /* 0x81 */ { "SMBsearch",reply_search
,AS_USER
},
724 /* 0x82 */ { "SMBffirst",reply_search
,AS_USER
},
725 /* 0x83 */ { "SMBfunique",reply_search
,AS_USER
},
726 /* 0x84 */ { "SMBfclose",reply_fclose
,AS_USER
},
727 /* 0x85 */ { NULL
, NULL
, 0 },
728 /* 0x86 */ { NULL
, NULL
, 0 },
729 /* 0x87 */ { NULL
, NULL
, 0 },
730 /* 0x88 */ { NULL
, NULL
, 0 },
731 /* 0x89 */ { NULL
, NULL
, 0 },
732 /* 0x8a */ { NULL
, NULL
, 0 },
733 /* 0x8b */ { NULL
, NULL
, 0 },
734 /* 0x8c */ { NULL
, NULL
, 0 },
735 /* 0x8d */ { NULL
, NULL
, 0 },
736 /* 0x8e */ { NULL
, NULL
, 0 },
737 /* 0x8f */ { NULL
, NULL
, 0 },
738 /* 0x90 */ { NULL
, NULL
, 0 },
739 /* 0x91 */ { NULL
, NULL
, 0 },
740 /* 0x92 */ { NULL
, NULL
, 0 },
741 /* 0x93 */ { NULL
, NULL
, 0 },
742 /* 0x94 */ { NULL
, NULL
, 0 },
743 /* 0x95 */ { NULL
, NULL
, 0 },
744 /* 0x96 */ { NULL
, NULL
, 0 },
745 /* 0x97 */ { NULL
, NULL
, 0 },
746 /* 0x98 */ { NULL
, NULL
, 0 },
747 /* 0x99 */ { NULL
, NULL
, 0 },
748 /* 0x9a */ { NULL
, NULL
, 0 },
749 /* 0x9b */ { NULL
, NULL
, 0 },
750 /* 0x9c */ { NULL
, NULL
, 0 },
751 /* 0x9d */ { NULL
, NULL
, 0 },
752 /* 0x9e */ { NULL
, NULL
, 0 },
753 /* 0x9f */ { NULL
, NULL
, 0 },
754 /* 0xa0 */ { "SMBnttrans", reply_nttrans
, AS_USER
| CAN_IPC
},
755 /* 0xa1 */ { "SMBnttranss", reply_nttranss
, AS_USER
| CAN_IPC
},
756 /* 0xa2 */ { "SMBntcreateX", reply_ntcreate_and_X
, AS_USER
| CAN_IPC
},
757 /* 0xa3 */ { NULL
, NULL
, 0 },
758 /* 0xa4 */ { "SMBntcancel", reply_ntcancel
, 0 },
759 /* 0xa5 */ { "SMBntrename", reply_ntrename
, AS_USER
| NEED_WRITE
},
760 /* 0xa6 */ { NULL
, NULL
, 0 },
761 /* 0xa7 */ { NULL
, NULL
, 0 },
762 /* 0xa8 */ { NULL
, NULL
, 0 },
763 /* 0xa9 */ { NULL
, NULL
, 0 },
764 /* 0xaa */ { NULL
, NULL
, 0 },
765 /* 0xab */ { NULL
, NULL
, 0 },
766 /* 0xac */ { NULL
, NULL
, 0 },
767 /* 0xad */ { NULL
, NULL
, 0 },
768 /* 0xae */ { NULL
, NULL
, 0 },
769 /* 0xaf */ { NULL
, NULL
, 0 },
770 /* 0xb0 */ { NULL
, NULL
, 0 },
771 /* 0xb1 */ { NULL
, NULL
, 0 },
772 /* 0xb2 */ { NULL
, NULL
, 0 },
773 /* 0xb3 */ { NULL
, NULL
, 0 },
774 /* 0xb4 */ { NULL
, NULL
, 0 },
775 /* 0xb5 */ { NULL
, NULL
, 0 },
776 /* 0xb6 */ { NULL
, NULL
, 0 },
777 /* 0xb7 */ { NULL
, NULL
, 0 },
778 /* 0xb8 */ { NULL
, NULL
, 0 },
779 /* 0xb9 */ { NULL
, NULL
, 0 },
780 /* 0xba */ { NULL
, NULL
, 0 },
781 /* 0xbb */ { NULL
, NULL
, 0 },
782 /* 0xbc */ { NULL
, NULL
, 0 },
783 /* 0xbd */ { NULL
, NULL
, 0 },
784 /* 0xbe */ { NULL
, NULL
, 0 },
785 /* 0xbf */ { NULL
, NULL
, 0 },
786 /* 0xc0 */ { "SMBsplopen",reply_printopen
,AS_USER
},
787 /* 0xc1 */ { "SMBsplwr",reply_printwrite
,AS_USER
},
788 /* 0xc2 */ { "SMBsplclose",reply_printclose
,AS_USER
},
789 /* 0xc3 */ { "SMBsplretq",reply_printqueue
,AS_USER
},
790 /* 0xc4 */ { NULL
, NULL
, 0 },
791 /* 0xc5 */ { NULL
, NULL
, 0 },
792 /* 0xc6 */ { NULL
, NULL
, 0 },
793 /* 0xc7 */ { NULL
, NULL
, 0 },
794 /* 0xc8 */ { NULL
, NULL
, 0 },
795 /* 0xc9 */ { NULL
, NULL
, 0 },
796 /* 0xca */ { NULL
, NULL
, 0 },
797 /* 0xcb */ { NULL
, NULL
, 0 },
798 /* 0xcc */ { NULL
, NULL
, 0 },
799 /* 0xcd */ { NULL
, NULL
, 0 },
800 /* 0xce */ { NULL
, NULL
, 0 },
801 /* 0xcf */ { NULL
, NULL
, 0 },
802 /* 0xd0 */ { "SMBsends",reply_sends
,AS_GUEST
},
803 /* 0xd1 */ { "SMBsendb",NULL
,AS_GUEST
},
804 /* 0xd2 */ { "SMBfwdname",NULL
,AS_GUEST
},
805 /* 0xd3 */ { "SMBcancelf",NULL
,AS_GUEST
},
806 /* 0xd4 */ { "SMBgetmac",NULL
,AS_GUEST
},
807 /* 0xd5 */ { "SMBsendstrt",reply_sendstrt
,AS_GUEST
},
808 /* 0xd6 */ { "SMBsendend",reply_sendend
,AS_GUEST
},
809 /* 0xd7 */ { "SMBsendtxt",reply_sendtxt
,AS_GUEST
},
810 /* 0xd8 */ { NULL
, NULL
, 0 },
811 /* 0xd9 */ { NULL
, NULL
, 0 },
812 /* 0xda */ { NULL
, NULL
, 0 },
813 /* 0xdb */ { NULL
, NULL
, 0 },
814 /* 0xdc */ { NULL
, NULL
, 0 },
815 /* 0xdd */ { NULL
, NULL
, 0 },
816 /* 0xde */ { NULL
, NULL
, 0 },
817 /* 0xdf */ { NULL
, NULL
, 0 },
818 /* 0xe0 */ { NULL
, NULL
, 0 },
819 /* 0xe1 */ { NULL
, NULL
, 0 },
820 /* 0xe2 */ { NULL
, NULL
, 0 },
821 /* 0xe3 */ { NULL
, NULL
, 0 },
822 /* 0xe4 */ { NULL
, NULL
, 0 },
823 /* 0xe5 */ { NULL
, NULL
, 0 },
824 /* 0xe6 */ { NULL
, NULL
, 0 },
825 /* 0xe7 */ { NULL
, NULL
, 0 },
826 /* 0xe8 */ { NULL
, NULL
, 0 },
827 /* 0xe9 */ { NULL
, NULL
, 0 },
828 /* 0xea */ { NULL
, NULL
, 0 },
829 /* 0xeb */ { NULL
, NULL
, 0 },
830 /* 0xec */ { NULL
, NULL
, 0 },
831 /* 0xed */ { NULL
, NULL
, 0 },
832 /* 0xee */ { NULL
, NULL
, 0 },
833 /* 0xef */ { NULL
, NULL
, 0 },
834 /* 0xf0 */ { NULL
, NULL
, 0 },
835 /* 0xf1 */ { NULL
, NULL
, 0 },
836 /* 0xf2 */ { NULL
, NULL
, 0 },
837 /* 0xf3 */ { NULL
, NULL
, 0 },
838 /* 0xf4 */ { NULL
, NULL
, 0 },
839 /* 0xf5 */ { NULL
, NULL
, 0 },
840 /* 0xf6 */ { NULL
, NULL
, 0 },
841 /* 0xf7 */ { NULL
, NULL
, 0 },
842 /* 0xf8 */ { NULL
, NULL
, 0 },
843 /* 0xf9 */ { NULL
, NULL
, 0 },
844 /* 0xfa */ { NULL
, NULL
, 0 },
845 /* 0xfb */ { NULL
, NULL
, 0 },
846 /* 0xfc */ { NULL
, NULL
, 0 },
847 /* 0xfd */ { NULL
, NULL
, 0 },
848 /* 0xfe */ { NULL
, NULL
, 0 },
849 /* 0xff */ { NULL
, NULL
, 0 }
853 /*******************************************************************
854 Dump a packet to a file.
855 ********************************************************************/
857 static void smb_dump(const char *name
, int type
, char *data
, ssize_t len
)
861 if (DEBUGLEVEL
< 50) return;
863 if (len
< 4) len
= smb_len(data
)+4;
864 for (i
=1;i
<100;i
++) {
865 slprintf(fname
,sizeof(fname
)-1, "/tmp/%s.%d.%s", name
, i
,
866 type
? "req" : "resp");
867 fd
= open(fname
, O_WRONLY
|O_CREAT
|O_EXCL
, 0644);
868 if (fd
!= -1 || errno
!= EEXIST
) break;
871 ssize_t ret
= write(fd
, data
, len
);
873 DEBUG(0,("smb_dump: problem: write returned %d\n", (int)ret
));
875 DEBUG(0,("created %s len %lu\n", fname
, (unsigned long)len
));
880 /****************************************************************************
881 Do a switch on the message type, and return the response size
882 ****************************************************************************/
884 static int switch_message(int type
,char *inbuf
,char *outbuf
,int size
,int bufsize
)
886 static pid_t pid
= (pid_t
)-1;
891 if (pid
== (pid_t
)-1)
898 /* Make sure this is an SMB packet. smb_size contains NetBIOS header so subtract 4 from it. */
899 if ((strncmp(smb_base(inbuf
),"\377SMB",4) != 0) || (size
< (smb_size
- 4))) {
900 DEBUG(2,("Non-SMB packet of length %d. Terminating server\n",smb_len(inbuf
)));
901 exit_server_cleanly("Non-SMB packet");
905 /* yuck! this is an interim measure before we get rid of our
906 current inbuf/outbuf system */
907 global_smbpid
= SVAL(inbuf
,smb_pid
);
909 if (smb_messages
[type
].fn
== NULL
) {
910 DEBUG(0,("Unknown message type %d!\n",type
));
911 smb_dump("Unknown", 1, inbuf
, size
);
912 outsize
= reply_unknown(inbuf
,outbuf
);
914 int flags
= smb_messages
[type
].flags
;
915 static uint16 last_session_tag
= UID_FIELD_INVALID
;
916 /* In share mode security we must ignore the vuid. */
917 uint16 session_tag
= (lp_security() == SEC_SHARE
) ? UID_FIELD_INVALID
: SVAL(inbuf
,smb_uid
);
918 connection_struct
*conn
= conn_find(SVAL(inbuf
,smb_tid
));
920 DEBUG(3,("switch message %s (pid %d) conn 0x%lx\n",smb_fn_name(type
),(int)pid
,(unsigned long)conn
));
922 smb_dump(smb_fn_name(type
), 1, inbuf
, size
);
924 /* Ensure this value is replaced in the incoming packet. */
925 SSVAL(inbuf
,smb_uid
,session_tag
);
928 * Ensure the correct username is in current_user_info.
929 * This is a really ugly bugfix for problems with
930 * multiple session_setup_and_X's being done and
931 * allowing %U and %G substitutions to work correctly.
932 * There is a reason this code is done here, don't
933 * move it unless you know what you're doing... :-).
937 if (session_tag
!= last_session_tag
) {
938 user_struct
*vuser
= NULL
;
940 last_session_tag
= session_tag
;
941 if(session_tag
!= UID_FIELD_INVALID
) {
942 vuser
= get_valid_user_struct(session_tag
);
944 set_current_user_info(&vuser
->user
);
949 /* Does this call need to be run as the connected user? */
950 if (flags
& AS_USER
) {
952 /* Does this call need a valid tree connection? */
954 /* Amazingly, the error code depends on the command (from Samba4). */
955 if (type
== SMBntcreateX
) {
956 return ERROR_NT(NT_STATUS_INVALID_HANDLE
);
958 return ERROR_DOS(ERRSRV
, ERRinvnid
);
962 if (!change_to_user(conn
,session_tag
)) {
963 return(ERROR_NT(NT_STATUS_DOS(ERRSRV
,ERRbaduid
)));
966 /* All NEED_WRITE and CAN_IPC flags must also have AS_USER. */
968 /* Does it need write permission? */
969 if ((flags
& NEED_WRITE
) && !CAN_WRITE(conn
)) {
970 return(ERROR_DOS(ERRSRV
,ERRaccess
));
973 /* IPC services are limited */
974 if (IS_IPC(conn
) && !(flags
& CAN_IPC
)) {
975 return(ERROR_DOS(ERRSRV
,ERRaccess
));
978 /* This call needs to be run as root */
979 change_to_root_user();
982 /* load service specific parameters */
984 if (!set_current_service(conn
,SVAL(inbuf
,smb_flg
),(flags
& (AS_USER
|DO_CHDIR
)?True
:False
))) {
985 return(ERROR_DOS(ERRSRV
,ERRaccess
));
987 conn
->num_smb_operations
++;
990 /* does this protocol need to be run as guest? */
991 if ((flags
& AS_GUEST
) && (!change_to_guest() ||
992 !check_access(smbd_server_fd(), lp_hostsallow(-1), lp_hostsdeny(-1)))) {
993 return(ERROR_DOS(ERRSRV
,ERRaccess
));
996 current_inbuf
= inbuf
; /* In case we need to defer this message in open... */
997 outsize
= smb_messages
[type
].fn(conn
, inbuf
,outbuf
,size
,bufsize
);
1000 smb_dump(smb_fn_name(type
), 0, outbuf
, outsize
);
1005 /****************************************************************************
1006 Construct a reply to the incoming packet.
1007 ****************************************************************************/
1009 static int construct_reply(char *inbuf
,char *outbuf
,int size
,int bufsize
)
1011 int type
= CVAL(inbuf
,smb_com
);
1013 int msg_type
= CVAL(inbuf
,0);
1020 return(reply_special(inbuf
,outbuf
));
1022 construct_reply_common(inbuf
, outbuf
);
1024 outsize
= switch_message(type
,inbuf
,outbuf
,size
,bufsize
);
1026 outsize
+= chain_size
;
1029 smb_setlen(outbuf
,outsize
- 4);
1033 /****************************************************************************
1034 Process an smb from the client
1035 ****************************************************************************/
1037 static void process_smb(char *inbuf
, char *outbuf
)
1039 static int trans_num
;
1040 int msg_type
= CVAL(inbuf
,0);
1041 int32 len
= smb_len(inbuf
);
1042 int nread
= len
+ 4;
1044 DO_PROFILE_INC(smb_count
);
1046 if (trans_num
== 0) {
1047 /* on the first packet, check the global hosts allow/ hosts
1048 deny parameters before doing any parsing of the packet
1049 passed to us by the client. This prevents attacks on our
1050 parsing code from hosts not in the hosts allow list */
1051 if (!check_access(smbd_server_fd(), lp_hostsallow(-1),
1052 lp_hostsdeny(-1))) {
1053 /* send a negative session response "not listening on calling name" */
1054 static unsigned char buf
[5] = {0x83, 0, 0, 1, 0x81};
1055 DEBUG( 1, ( "Connection denied from %s\n", client_addr() ) );
1056 (void)send_smb(smbd_server_fd(),(char *)buf
);
1057 exit_server_cleanly("connection denied");
1061 DEBUG( 6, ( "got message type 0x%x of len 0x%x\n", msg_type
, len
) );
1062 DEBUG( 3, ( "Transaction %d of length %d\n", trans_num
, nread
) );
1066 else if(msg_type
== SMBkeepalive
)
1067 return; /* Keepalive packet. */
1069 nread
= construct_reply(inbuf
,outbuf
,nread
,max_send
);
1072 if (CVAL(outbuf
,0) == 0)
1075 if (nread
!= smb_len(outbuf
) + 4) {
1076 DEBUG(0,("ERROR: Invalid message response size! %d %d\n",
1077 nread
, smb_len(outbuf
)));
1078 } else if (!send_smb(smbd_server_fd(),outbuf
)) {
1079 exit_server_cleanly("process_smb: send_smb failed.");
1085 /****************************************************************************
1086 Return a string containing the function name of a SMB command.
1087 ****************************************************************************/
1089 const char *smb_fn_name(int type
)
1091 const char *unknown_name
= "SMBunknown";
1093 if (smb_messages
[type
].name
== NULL
)
1094 return(unknown_name
);
1096 return(smb_messages
[type
].name
);
1099 /****************************************************************************
1100 Helper functions for contruct_reply.
1101 ****************************************************************************/
1103 static uint32 common_flags2
= FLAGS2_LONG_PATH_COMPONENTS
|FLAGS2_32_BIT_ERROR_CODES
;
1105 void add_to_common_flags2(uint32 v
)
1110 void remove_from_common_flags2(uint32 v
)
1112 common_flags2
&= ~v
;
1115 void construct_reply_common(const char *inbuf
, char *outbuf
)
1117 set_message(outbuf
,0,0,False
);
1119 SCVAL(outbuf
,smb_com
,CVAL(inbuf
,smb_com
));
1120 SIVAL(outbuf
,smb_rcls
,0);
1121 SCVAL(outbuf
,smb_flg
, FLAG_REPLY
| (CVAL(inbuf
,smb_flg
) & FLAG_CASELESS_PATHNAMES
));
1122 SSVAL(outbuf
,smb_flg2
,
1123 (SVAL(inbuf
,smb_flg2
) & FLAGS2_UNICODE_STRINGS
) |
1125 memset(outbuf
+smb_pidhigh
,'\0',(smb_tid
-smb_pidhigh
));
1127 SSVAL(outbuf
,smb_tid
,SVAL(inbuf
,smb_tid
));
1128 SSVAL(outbuf
,smb_pid
,SVAL(inbuf
,smb_pid
));
1129 SSVAL(outbuf
,smb_uid
,SVAL(inbuf
,smb_uid
));
1130 SSVAL(outbuf
,smb_mid
,SVAL(inbuf
,smb_mid
));
1133 /****************************************************************************
1134 Construct a chained reply and add it to the already made reply
1135 ****************************************************************************/
1137 int chain_reply(char *inbuf
,char *outbuf
,int size
,int bufsize
)
1139 static char *orig_inbuf
;
1140 static char *orig_outbuf
;
1141 int smb_com1
, smb_com2
= CVAL(inbuf
,smb_vwv0
);
1142 unsigned smb_off2
= SVAL(inbuf
,smb_vwv1
);
1143 char *inbuf2
, *outbuf2
;
1145 char inbuf_saved
[smb_wct
];
1146 char outbuf_saved
[smb_wct
];
1147 int outsize
= smb_len(outbuf
) + 4;
1149 /* maybe its not chained */
1150 if (smb_com2
== 0xFF) {
1151 SCVAL(outbuf
,smb_vwv0
,0xFF);
1155 if (chain_size
== 0) {
1156 /* this is the first part of the chain */
1158 orig_outbuf
= outbuf
;
1162 * The original Win95 redirector dies on a reply to
1163 * a lockingX and read chain unless the chain reply is
1164 * 4 byte aligned. JRA.
1167 outsize
= (outsize
+ 3) & ~3;
1169 /* we need to tell the client where the next part of the reply will be */
1170 SSVAL(outbuf
,smb_vwv1
,smb_offset(outbuf
+outsize
,outbuf
));
1171 SCVAL(outbuf
,smb_vwv0
,smb_com2
);
1173 /* remember how much the caller added to the chain, only counting stuff
1174 after the parameter words */
1175 chain_size
+= outsize
- smb_wct
;
1177 /* work out pointers into the original packets. The
1178 headers on these need to be filled in */
1179 inbuf2
= orig_inbuf
+ smb_off2
+ 4 - smb_wct
;
1180 outbuf2
= orig_outbuf
+ SVAL(outbuf
,smb_vwv1
) + 4 - smb_wct
;
1182 /* remember the original command type */
1183 smb_com1
= CVAL(orig_inbuf
,smb_com
);
1185 /* save the data which will be overwritten by the new headers */
1186 memcpy(inbuf_saved
,inbuf2
,smb_wct
);
1187 memcpy(outbuf_saved
,outbuf2
,smb_wct
);
1189 /* give the new packet the same header as the last part of the SMB */
1190 memmove(inbuf2
,inbuf
,smb_wct
);
1192 /* create the in buffer */
1193 SCVAL(inbuf2
,smb_com
,smb_com2
);
1195 /* create the out buffer */
1196 construct_reply_common(inbuf2
, outbuf2
);
1198 DEBUG(3,("Chained message\n"));
1201 /* process the request */
1202 outsize2
= switch_message(smb_com2
,inbuf2
,outbuf2
,size
-chain_size
,
1203 bufsize
-chain_size
);
1205 /* copy the new reply and request headers over the old ones, but
1206 preserve the smb_com field */
1207 memmove(orig_outbuf
,outbuf2
,smb_wct
);
1208 SCVAL(orig_outbuf
,smb_com
,smb_com1
);
1210 /* restore the saved data, being careful not to overwrite any
1211 data from the reply header */
1212 memcpy(inbuf2
,inbuf_saved
,smb_wct
);
1215 int ofs
= smb_wct
- PTR_DIFF(outbuf2
,orig_outbuf
);
1216 if (ofs
< 0) ofs
= 0;
1217 memmove(outbuf2
+ofs
,outbuf_saved
+ofs
,smb_wct
-ofs
);
1223 /****************************************************************************
1224 Setup the needed select timeout in milliseconds.
1225 ****************************************************************************/
1227 static int setup_select_timeout(void)
1232 select_timeout
= blocking_locks_timeout_ms(SMBD_SELECT_TIMEOUT
*1000);
1234 t
= change_notify_timeout();
1235 DEBUG(10, ("change_notify_timeout: %d\n", t
));
1237 select_timeout
= MIN(select_timeout
, t
*1000);
1240 if (print_notify_messages_pending()) {
1241 select_timeout
= MIN(select_timeout
, 1000);
1244 return select_timeout
;
1247 /****************************************************************************
1248 Check if services need reloading.
1249 ****************************************************************************/
1251 void check_reload(time_t t
)
1253 static pid_t mypid
= 0;
1254 static time_t last_smb_conf_reload_time
= 0;
1255 static time_t last_printer_reload_time
= 0;
1256 time_t printcap_cache_time
= (time_t)lp_printcap_cache_time();
1258 if(last_smb_conf_reload_time
== 0) {
1259 last_smb_conf_reload_time
= t
;
1260 /* Our printing subsystem might not be ready at smbd start up.
1261 Then no printer is available till the first printers check
1262 is performed. A lower initial interval circumvents this. */
1263 if ( printcap_cache_time
> 60 )
1264 last_printer_reload_time
= t
- printcap_cache_time
+ 60;
1266 last_printer_reload_time
= t
;
1269 if (mypid
!= getpid()) { /* First time or fork happened meanwhile */
1270 /* randomize over 60 second the printcap reload to avoid all
1271 * process hitting cupsd at the same time */
1272 int time_range
= 60;
1274 last_printer_reload_time
+= random() % time_range
;
1278 if (reload_after_sighup
|| (t
>= last_smb_conf_reload_time
+SMBD_RELOAD_CHECK
)) {
1279 reload_services(True
);
1280 reload_after_sighup
= False
;
1281 last_smb_conf_reload_time
= t
;
1284 /* 'printcap cache time = 0' disable the feature */
1286 if ( printcap_cache_time
!= 0 )
1288 /* see if it's time to reload or if the clock has been set back */
1290 if ( (t
>= last_printer_reload_time
+printcap_cache_time
)
1291 || (t
-last_printer_reload_time
< 0) )
1293 DEBUG( 3,( "Printcap cache time expired.\n"));
1295 last_printer_reload_time
= t
;
1300 /****************************************************************************
1301 Process any timeout housekeeping. Return False if the caller should exit.
1302 ****************************************************************************/
1304 static BOOL
timeout_processing(int deadtime
, int *select_timeout
, time_t *last_timeout_processing_time
)
1306 static time_t last_keepalive_sent_time
= 0;
1307 static time_t last_idle_closed_check
= 0;
1309 BOOL allidle
= True
;
1311 if (smb_read_error
== READ_EOF
) {
1312 DEBUG(3,("timeout_processing: End of file from client (client has disconnected).\n"));
1316 if (smb_read_error
== READ_ERROR
) {
1317 DEBUG(3,("timeout_processing: receive_smb error (%s) Exiting\n",
1322 if (smb_read_error
== READ_BAD_SIG
) {
1323 DEBUG(3,("timeout_processing: receive_smb error bad smb signature. Exiting\n"));
1327 *last_timeout_processing_time
= t
= time(NULL
);
1329 if(last_keepalive_sent_time
== 0)
1330 last_keepalive_sent_time
= t
;
1332 if(last_idle_closed_check
== 0)
1333 last_idle_closed_check
= t
;
1335 /* become root again if waiting */
1336 change_to_root_user();
1338 /* run all registered idle events */
1339 smb_run_idle_events(t
);
1341 /* check if we need to reload services */
1344 /* automatic timeout if all connections are closed */
1345 if (conn_num_open()==0 && (t
- last_idle_closed_check
) >= IDLE_CLOSED_TIMEOUT
) {
1346 DEBUG( 2, ( "Closing idle connection\n" ) );
1349 last_idle_closed_check
= t
;
1352 if (keepalive
&& (t
- last_keepalive_sent_time
)>keepalive
) {
1353 if (!send_keepalive(smbd_server_fd())) {
1354 DEBUG( 2, ( "Keepalive failed - exiting.\n" ) );
1358 /* send a keepalive for a password server or the like.
1359 This is attached to the auth_info created in the
1361 if (negprot_global_auth_context
&& negprot_global_auth_context
->challenge_set_method
1362 && negprot_global_auth_context
->challenge_set_method
->send_keepalive
) {
1364 negprot_global_auth_context
->challenge_set_method
->send_keepalive
1365 (&negprot_global_auth_context
->challenge_set_method
->private_data
);
1368 last_keepalive_sent_time
= t
;
1371 /* check for connection timeouts */
1372 allidle
= conn_idle_all(t
, deadtime
);
1374 if (allidle
&& conn_num_open()>0) {
1375 DEBUG(2,("Closing idle connection 2.\n"));
1379 if(global_machine_password_needs_changing
&&
1380 /* for ADS we need to do a regular ADS password change, not a domain
1382 lp_security() == SEC_DOMAIN
) {
1384 unsigned char trust_passwd_hash
[16];
1388 * We're in domain level security, and the code that
1389 * read the machine password flagged that the machine
1390 * password needs changing.
1394 * First, open the machine password file with an exclusive lock.
1397 if (secrets_lock_trust_account_password(lp_workgroup(), True
) == False
) {
1398 DEBUG(0,("process: unable to lock the machine account password for \
1399 machine %s in domain %s.\n", global_myname(), lp_workgroup() ));
1403 if(!secrets_fetch_trust_account_password(lp_workgroup(), trust_passwd_hash
, &lct
, NULL
)) {
1404 DEBUG(0,("process: unable to read the machine account password for \
1405 machine %s in domain %s.\n", global_myname(), lp_workgroup()));
1406 secrets_lock_trust_account_password(lp_workgroup(), False
);
1411 * Make sure someone else hasn't already done this.
1414 if(t
< lct
+ lp_machine_password_timeout()) {
1415 global_machine_password_needs_changing
= False
;
1416 secrets_lock_trust_account_password(lp_workgroup(), False
);
1420 /* always just contact the PDC here */
1422 change_trust_account_password( lp_workgroup(), NULL
);
1423 global_machine_password_needs_changing
= False
;
1424 secrets_lock_trust_account_password(lp_workgroup(), False
);
1428 * Check to see if we have any blocking locks
1429 * outstanding on the queue.
1431 process_blocking_lock_queue();
1433 /* update printer queue caches if necessary */
1435 update_monitored_printq_cache();
1438 * Check to see if we have any change notifies
1439 * outstanding on the queue.
1441 process_pending_change_notify_queue(t
);
1444 * Now we are root, check if the log files need pruning.
1445 * Force a log file check.
1447 force_check_log_size();
1450 /* Send any queued printer notify message to interested smbd's. */
1452 print_notify_send_messages(0);
1455 * Modify the select timeout depending upon
1456 * what we have remaining in our queues.
1459 *select_timeout
= setup_select_timeout();
1464 /****************************************************************************
1465 Accessor functions for InBuffer, OutBuffer.
1466 ****************************************************************************/
1468 char *get_InBuffer(void)
1473 void set_InBuffer(char *new_inbuf
)
1475 InBuffer
= new_inbuf
;
1476 current_inbuf
= InBuffer
;
1479 char *get_OutBuffer(void)
1484 void set_OutBuffer(char *new_outbuf
)
1486 OutBuffer
= new_outbuf
;
1489 /****************************************************************************
1490 Free an InBuffer. Checks if not in use by aio system.
1491 Must have been allocated by NewInBuffer.
1492 ****************************************************************************/
1494 void free_InBuffer(char *inbuf
)
1496 if (!aio_inbuffer_in_use(inbuf
)) {
1497 if (current_inbuf
== inbuf
) {
1498 current_inbuf
= NULL
;
1504 /****************************************************************************
1505 Free an OutBuffer. No outbuffers currently stolen by aio system.
1506 Must have been allocated by NewInBuffer.
1507 ****************************************************************************/
1509 void free_OutBuffer(char *outbuf
)
1514 const int total_buffer_size
= (BUFFER_SIZE
+ LARGE_WRITEX_HDR_SIZE
+ SAFETY_MARGIN
);
1516 /****************************************************************************
1517 Allocate a new InBuffer. Returns the new and old ones.
1518 ****************************************************************************/
1520 char *NewInBuffer(char **old_inbuf
)
1522 char *new_inbuf
= (char *)SMB_MALLOC(total_buffer_size
);
1527 *old_inbuf
= InBuffer
;
1529 InBuffer
= new_inbuf
;
1530 #if defined(DEVELOPER)
1531 clobber_region(SAFE_STRING_FUNCTION_NAME
, SAFE_STRING_LINE
, InBuffer
, total_buffer_size
);
1536 /****************************************************************************
1537 Allocate a new OutBuffer. Returns the new and old ones.
1538 ****************************************************************************/
1540 char *NewOutBuffer(char **old_outbuf
)
1542 char *new_outbuf
= (char *)SMB_MALLOC(total_buffer_size
);
1547 *old_outbuf
= OutBuffer
;
1549 OutBuffer
= new_outbuf
;
1550 #if defined(DEVELOPER)
1551 clobber_region(SAFE_STRING_FUNCTION_NAME
, SAFE_STRING_LINE
, OutBuffer
, total_buffer_size
);
1556 /****************************************************************************
1557 Process commands from the client
1558 ****************************************************************************/
1560 void smbd_process(void)
1562 time_t last_timeout_processing_time
= time(NULL
);
1563 unsigned int num_smbs
= 0;
1565 /* Allocate the primary Inbut/Output buffers. */
1567 if ((NewInBuffer(NULL
) == NULL
) || (NewOutBuffer(NULL
) == NULL
))
1570 max_recv
= MIN(lp_maxxmit(),BUFFER_SIZE
);
1573 int deadtime
= lp_deadtime()*60;
1574 int select_timeout
= setup_select_timeout();
1578 deadtime
= DEFAULT_SMBD_TIMEOUT
;
1582 /* free up temporary memory */
1584 main_loop_TALLOC_FREE();
1586 /* Did someone ask for immediate checks on things like blocking locks ? */
1587 if (select_timeout
== 0) {
1588 if(!timeout_processing( deadtime
, &select_timeout
, &last_timeout_processing_time
))
1590 num_smbs
= 0; /* Reset smb counter. */
1595 #if defined(DEVELOPER)
1596 clobber_region(SAFE_STRING_FUNCTION_NAME
, SAFE_STRING_LINE
, InBuffer
, total_buffer_size
);
1599 while (!receive_message_or_smb(InBuffer
,BUFFER_SIZE
+LARGE_WRITEX_HDR_SIZE
,select_timeout
)) {
1600 if(!timeout_processing( deadtime
, &select_timeout
, &last_timeout_processing_time
))
1602 num_smbs
= 0; /* Reset smb counter. */
1606 * Ensure we do timeout processing if the SMB we just got was
1607 * only an echo request. This allows us to set the select
1608 * timeout in 'receive_message_or_smb()' to any value we like
1609 * without worrying that the client will send echo requests
1610 * faster than the select timeout, thus starving out the
1611 * essential processing (change notify, blocking locks) that
1612 * the timeout code does. JRA.
1614 num_echos
= smb_echo_count
;
1616 clobber_region(SAFE_STRING_FUNCTION_NAME
, SAFE_STRING_LINE
, OutBuffer
, total_buffer_size
);
1618 process_smb(InBuffer
, OutBuffer
);
1620 if (smb_echo_count
!= num_echos
) {
1621 if(!timeout_processing( deadtime
, &select_timeout
, &last_timeout_processing_time
))
1623 num_smbs
= 0; /* Reset smb counter. */
1629 * If we are getting smb requests in a constant stream
1630 * with no echos, make sure we attempt timeout processing
1631 * every select_timeout milliseconds - but only check for this
1632 * every 200 smb requests.
1635 if ((num_smbs
% 200) == 0) {
1636 time_t new_check_time
= time(NULL
);
1637 if(new_check_time
- last_timeout_processing_time
>= (select_timeout
/1000)) {
1638 if(!timeout_processing( deadtime
, &select_timeout
, &last_timeout_processing_time
))
1640 num_smbs
= 0; /* Reset smb counter. */
1641 last_timeout_processing_time
= new_check_time
; /* Reset time. */
1645 /* The timeout_processing function isn't run nearly
1646 often enough to implement 'max log size' without
1647 overrunning the size of the file by many megabytes.
1648 This is especially true if we are running at debug
1649 level 10. Checking every 50 SMBs is a nice
1650 tradeoff of performance vs log file size overrun. */
1652 if ((num_smbs
% 50) == 0 && need_to_check_log_size()) {
1653 change_to_root_user();