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.
24 extern uint16 global_smbpid
;
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
) {
174 set_saved_ntstatus(NT_STATUS_OK
);
181 /****************************************************************************
182 Return the message queued by this mid.
183 ****************************************************************************/
185 struct pending_message_list
*get_open_deferred_message(uint16 mid
)
187 struct pending_message_list
*pml
;
189 for (pml
= deferred_open_queue
; pml
; pml
= pml
->next
) {
190 if (SVAL(pml
->buf
.data
,smb_mid
) == mid
) {
197 /****************************************************************************
198 Function to push a deferred open smb message onto a linked list of local smb
199 messages ready for processing.
200 ****************************************************************************/
202 BOOL
push_deferred_smb_message(uint16 mid
,
203 struct timeval request_time
,
204 struct timeval timeout
,
205 char *private_data
, size_t priv_len
)
207 struct timeval end_time
;
209 end_time
= timeval_sum(&request_time
, &timeout
);
211 DEBUG(10,("push_deferred_open_smb_message: pushing message len %u mid %u "
212 "timeout time [%u.%06u]\n",
213 (unsigned int) smb_len(current_inbuf
)+4, (unsigned int)mid
,
214 (unsigned int)end_time
.tv_sec
,
215 (unsigned int)end_time
.tv_usec
));
217 return push_queued_message(current_inbuf
, smb_len(current_inbuf
)+4,
218 request_time
, end_time
,
219 private_data
, priv_len
);
223 struct timed_event
*te
;
224 struct timeval interval
;
225 BOOL (*handler
)(const struct timeval
*now
, void *private_data
);
229 static void idle_event_handler(struct timed_event
*te
,
230 const struct timeval
*now
,
233 struct idle_event
*event
=
234 talloc_get_type_abort(private_data
, struct idle_event
);
236 TALLOC_FREE(event
->te
);
238 if (!event
->handler(now
, event
->private_data
)) {
239 /* Don't repeat, delete ourselves */
244 event
->te
= add_timed_event(event
, timeval_sum(now
, &event
->interval
),
245 "idle_event_handler",
246 idle_event_handler
, event
);
248 /* We can't do much but fail here. */
249 SMB_ASSERT(event
->te
!= NULL
);
252 struct idle_event
*add_idle_event(TALLOC_CTX
*mem_ctx
,
253 struct timeval interval
,
254 BOOL (*handler
)(const struct timeval
*now
,
258 struct idle_event
*result
;
259 struct timeval now
= timeval_current();
261 result
= TALLOC_P(mem_ctx
, struct idle_event
);
262 if (result
== NULL
) {
263 DEBUG(0, ("talloc failed\n"));
267 result
->interval
= interval
;
268 result
->handler
= handler
;
269 result
->private_data
= private_data
;
271 result
->te
= add_timed_event(result
, timeval_sum(&now
, &interval
),
272 "idle_event_handler",
273 idle_event_handler
, result
);
274 if (result
->te
== NULL
) {
275 DEBUG(0, ("add_timed_event failed\n"));
283 /****************************************************************************
284 Do all async processing in here. This includes kernel oplock messages, change
286 ****************************************************************************/
288 static void async_processing(fd_set
*pfds
)
290 DEBUG(10,("async_processing: Doing async processing.\n"));
294 process_kernel_oplocks(pfds
);
296 /* Do the aio check again after receive_local_message as it does a
297 select and may have eaten our signal. */
298 /* Is this till true? -- vl */
302 exit_server_cleanly("termination signal");
305 /* check for async change notify events */
306 process_pending_change_notify_queue(0);
308 /* check for sighup processing */
309 if (reload_after_sighup
) {
310 change_to_root_user();
311 DEBUG(1,("Reloading services after SIGHUP\n"));
312 reload_services(False
);
313 reload_after_sighup
= 0;
317 /****************************************************************************
318 Add a fd to the set we will be select(2)ing on.
319 ****************************************************************************/
321 static int select_on_fd(int fd
, int maxfd
, fd_set
*fds
)
325 maxfd
= MAX(maxfd
, fd
);
331 /****************************************************************************
332 Do a select on an two fd's - with timeout.
334 If a local udp message has been pushed onto the
335 queue (this can only happen during oplock break
336 processing) call async_processing()
338 If a pending smb message has been pushed onto the
339 queue (this can only happen during oplock break
340 processing) return this next.
342 If the first smbfd is ready then read an smb from it.
343 if the second (loopback UDP) fd is ready then read a message
344 from it and setup the buffer header to identify the length
346 Returns False on timeout or error.
349 The timeout is in milliseconds
350 ****************************************************************************/
352 static BOOL
receive_message_or_smb(char *buffer
, int buffer_len
, int timeout
)
364 to
.tv_sec
= timeout
/ 1000;
365 to
.tv_usec
= (timeout
% 1000) * 1000;
367 to
.tv_sec
= SMBD_SELECT_TIMEOUT
;
372 * Note that this call must be before processing any SMB
373 * messages as we need to synchronously process any messages
374 * we may have sent to ourselves from the previous SMB.
379 * Check to see if we already have a message on the deferred open queue
380 * and it's time to schedule.
382 if(deferred_open_queue
!= NULL
) {
383 BOOL pop_message
= False
;
384 struct pending_message_list
*msg
= deferred_open_queue
;
386 if (timeval_is_zero(&msg
->end_time
)) {
393 tdif
= usec_time_diff(&msg
->end_time
, &tv
);
395 /* Timed out. Schedule...*/
397 DEBUG(10,("receive_message_or_smb: queued message timed out.\n"));
399 /* Make a more accurate select timeout. */
400 to
.tv_sec
= tdif
/ 1000000;
401 to
.tv_usec
= tdif
% 1000000;
402 DEBUG(10,("receive_message_or_smb: select with timeout of [%u.%06u]\n",
403 (unsigned int)to
.tv_sec
, (unsigned int)to
.tv_usec
));
408 memcpy(buffer
, msg
->buf
.data
, MIN(buffer_len
, msg
->buf
.length
));
410 /* We leave this message on the queue so the open code can
411 know this is a retry. */
412 DEBUG(5,("receive_message_or_smb: returning deferred open smb message.\n"));
418 * Setup the select read fd set.
424 * Ensure we process oplock break messages by preference.
425 * We have to do this before the select, after the select
426 * and if the select returns EINTR. This is due to the fact
427 * that the selects called from async_processing can eat an EINTR
428 * caused by a signal (we can't take the break message there).
429 * This is hideously complex - *MUST* be simplified for 3.0 ! JRA.
432 if (oplock_message_waiting(&fds
)) {
433 DEBUG(10,("receive_message_or_smb: oplock_message is waiting.\n"));
434 async_processing(&fds
);
436 * After async processing we must go and do the select again, as
437 * the state of the flag in fds for the server file descriptor is
438 * indeterminate - we may have done I/O on it in the oplock processing. JRA.
444 * Are there any timed events waiting ? If so, ensure we don't
445 * select for longer than it would take to wait for them.
450 struct timeval
*tp
= get_timed_events_timeout(&tmp
);
453 to
= timeval_min(&to
, tp
);
454 if (timeval_is_zero(&to
)) {
455 /* Process a timed event now... */
463 START_PROFILE(smbd_idle
);
465 maxfd
= select_on_fd(smbd_server_fd(), maxfd
, &fds
);
466 maxfd
= select_on_fd(change_notify_fd(), maxfd
, &fds
);
467 maxfd
= select_on_fd(oplock_notify_fd(), maxfd
, &fds
);
469 selrtn
= sys_select(maxfd
+1,&fds
,NULL
,NULL
,&to
);
472 END_PROFILE(smbd_idle
);
476 /* if we get EINTR then maybe we have received an oplock
477 signal - treat this as select returning 1. This is ugly, but
478 is the best we can do until the oplock code knows more about
480 if (selrtn
== -1 && errno
== EINTR
) {
481 async_processing(&fds
);
483 * After async processing we must go and do the select again, as
484 * the state of the flag in fds for the server file descriptor is
485 * indeterminate - we may have done I/O on it in the oplock processing. JRA.
492 /* something is wrong. Maybe the socket is dead? */
493 smb_read_error
= READ_ERROR
;
497 /* Did we timeout ? */
499 smb_read_error
= READ_TIMEOUT
;
504 * Ensure we process oplock break messages by preference.
505 * This is IMPORTANT ! Otherwise we can starve other processes
506 * sending us an oplock break message. JRA.
509 if (oplock_message_waiting(&fds
)) {
510 async_processing(&fds
);
512 * After async processing we must go and do the select again, as
513 * the state of the flag in fds for the server file descriptor is
514 * indeterminate - we may have done I/O on it in the oplock processing. JRA.
519 return receive_smb(smbd_server_fd(), buffer
, 0);
523 * Only allow 5 outstanding trans requests. We're allocating memory, so
527 NTSTATUS
allow_new_trans(struct trans_state
*list
, int mid
)
530 for (; list
!= NULL
; list
= list
->next
) {
532 if (list
->mid
== mid
) {
533 return NT_STATUS_INVALID_PARAMETER
;
539 return NT_STATUS_INSUFFICIENT_RESOURCES
;
545 /****************************************************************************
546 We're terminating and have closed all our files/connections etc.
547 If there are any pending local messages we need to respond to them
548 before termination so that other smbds don't think we just died whilst
550 ****************************************************************************/
552 void respond_to_all_remaining_local_messages(void)
555 * Assert we have no exclusive open oplocks.
558 if(get_number_of_exclusive_open_oplocks()) {
559 DEBUG(0,("respond_to_all_remaining_local_messages: PANIC : we have %d exclusive oplocks.\n",
560 get_number_of_exclusive_open_oplocks() ));
564 process_kernel_oplocks(NULL
);
571 These flags determine some of the permissions required to do an operation
573 Note that I don't set NEED_WRITE on some write operations because they
574 are used by some brain-dead clients when printing, and I don't want to
575 force write permissions on print services.
577 #define AS_USER (1<<0)
578 #define NEED_WRITE (1<<1) /* Must be paired with AS_USER */
579 #define TIME_INIT (1<<2)
580 #define CAN_IPC (1<<3) /* Must be paired with AS_USER */
581 #define AS_GUEST (1<<5) /* Must *NOT* be paired with AS_USER */
582 #define DO_CHDIR (1<<6)
585 define a list of possible SMB messages and their corresponding
586 functions. Any message that has a NULL function is unimplemented -
587 please feel free to contribute implementations!
589 static const struct smb_message_struct
{
591 int (*fn
)(connection_struct
*conn
, char *, char *, int, int);
593 } smb_messages
[256] = {
595 /* 0x00 */ { "SMBmkdir",reply_mkdir
,AS_USER
| NEED_WRITE
},
596 /* 0x01 */ { "SMBrmdir",reply_rmdir
,AS_USER
| NEED_WRITE
},
597 /* 0x02 */ { "SMBopen",reply_open
,AS_USER
},
598 /* 0x03 */ { "SMBcreate",reply_mknew
,AS_USER
},
599 /* 0x04 */ { "SMBclose",reply_close
,AS_USER
| CAN_IPC
},
600 /* 0x05 */ { "SMBflush",reply_flush
,AS_USER
},
601 /* 0x06 */ { "SMBunlink",reply_unlink
,AS_USER
| NEED_WRITE
},
602 /* 0x07 */ { "SMBmv",reply_mv
,AS_USER
| NEED_WRITE
},
603 /* 0x08 */ { "SMBgetatr",reply_getatr
,AS_USER
},
604 /* 0x09 */ { "SMBsetatr",reply_setatr
,AS_USER
| NEED_WRITE
},
605 /* 0x0a */ { "SMBread",reply_read
,AS_USER
},
606 /* 0x0b */ { "SMBwrite",reply_write
,AS_USER
| CAN_IPC
},
607 /* 0x0c */ { "SMBlock",reply_lock
,AS_USER
},
608 /* 0x0d */ { "SMBunlock",reply_unlock
,AS_USER
},
609 /* 0x0e */ { "SMBctemp",reply_ctemp
,AS_USER
},
610 /* 0x0f */ { "SMBmknew",reply_mknew
,AS_USER
},
611 /* 0x10 */ { "SMBchkpth",reply_chkpth
,AS_USER
},
612 /* 0x11 */ { "SMBexit",reply_exit
,DO_CHDIR
},
613 /* 0x12 */ { "SMBlseek",reply_lseek
,AS_USER
},
614 /* 0x13 */ { "SMBlockread",reply_lockread
,AS_USER
},
615 /* 0x14 */ { "SMBwriteunlock",reply_writeunlock
,AS_USER
},
616 /* 0x15 */ { NULL
, NULL
, 0 },
617 /* 0x16 */ { NULL
, NULL
, 0 },
618 /* 0x17 */ { NULL
, NULL
, 0 },
619 /* 0x18 */ { NULL
, NULL
, 0 },
620 /* 0x19 */ { NULL
, NULL
, 0 },
621 /* 0x1a */ { "SMBreadbraw",reply_readbraw
,AS_USER
},
622 /* 0x1b */ { "SMBreadBmpx",reply_readbmpx
,AS_USER
},
623 /* 0x1c */ { "SMBreadBs",NULL
,0 },
624 /* 0x1d */ { "SMBwritebraw",reply_writebraw
,AS_USER
},
625 /* 0x1e */ { "SMBwriteBmpx",reply_writebmpx
,AS_USER
},
626 /* 0x1f */ { "SMBwriteBs",reply_writebs
,AS_USER
},
627 /* 0x20 */ { "SMBwritec",NULL
,0},
628 /* 0x21 */ { NULL
, NULL
, 0 },
629 /* 0x22 */ { "SMBsetattrE",reply_setattrE
,AS_USER
| NEED_WRITE
},
630 /* 0x23 */ { "SMBgetattrE",reply_getattrE
,AS_USER
},
631 /* 0x24 */ { "SMBlockingX",reply_lockingX
,AS_USER
},
632 /* 0x25 */ { "SMBtrans",reply_trans
,AS_USER
| CAN_IPC
},
633 /* 0x26 */ { "SMBtranss",reply_transs
,AS_USER
| CAN_IPC
},
634 /* 0x27 */ { "SMBioctl",reply_ioctl
,0},
635 /* 0x28 */ { "SMBioctls",NULL
,AS_USER
},
636 /* 0x29 */ { "SMBcopy",reply_copy
,AS_USER
| NEED_WRITE
},
637 /* 0x2a */ { "SMBmove",NULL
,AS_USER
| NEED_WRITE
},
638 /* 0x2b */ { "SMBecho",reply_echo
,0},
639 /* 0x2c */ { "SMBwriteclose",reply_writeclose
,AS_USER
},
640 /* 0x2d */ { "SMBopenX",reply_open_and_X
,AS_USER
| CAN_IPC
},
641 /* 0x2e */ { "SMBreadX",reply_read_and_X
,AS_USER
| CAN_IPC
},
642 /* 0x2f */ { "SMBwriteX",reply_write_and_X
,AS_USER
| CAN_IPC
},
643 /* 0x30 */ { NULL
, NULL
, 0 },
644 /* 0x31 */ { NULL
, NULL
, 0 },
645 /* 0x32 */ { "SMBtrans2", reply_trans2
, AS_USER
| CAN_IPC
},
646 /* 0x33 */ { "SMBtranss2", reply_transs2
, AS_USER
},
647 /* 0x34 */ { "SMBfindclose", reply_findclose
,AS_USER
},
648 /* 0x35 */ { "SMBfindnclose", reply_findnclose
, AS_USER
},
649 /* 0x36 */ { NULL
, NULL
, 0 },
650 /* 0x37 */ { NULL
, NULL
, 0 },
651 /* 0x38 */ { NULL
, NULL
, 0 },
652 /* 0x39 */ { NULL
, NULL
, 0 },
653 /* 0x3a */ { NULL
, NULL
, 0 },
654 /* 0x3b */ { NULL
, NULL
, 0 },
655 /* 0x3c */ { NULL
, NULL
, 0 },
656 /* 0x3d */ { NULL
, NULL
, 0 },
657 /* 0x3e */ { NULL
, NULL
, 0 },
658 /* 0x3f */ { NULL
, NULL
, 0 },
659 /* 0x40 */ { NULL
, NULL
, 0 },
660 /* 0x41 */ { NULL
, NULL
, 0 },
661 /* 0x42 */ { NULL
, NULL
, 0 },
662 /* 0x43 */ { NULL
, NULL
, 0 },
663 /* 0x44 */ { NULL
, NULL
, 0 },
664 /* 0x45 */ { NULL
, NULL
, 0 },
665 /* 0x46 */ { NULL
, NULL
, 0 },
666 /* 0x47 */ { NULL
, NULL
, 0 },
667 /* 0x48 */ { NULL
, NULL
, 0 },
668 /* 0x49 */ { NULL
, NULL
, 0 },
669 /* 0x4a */ { NULL
, NULL
, 0 },
670 /* 0x4b */ { NULL
, NULL
, 0 },
671 /* 0x4c */ { NULL
, NULL
, 0 },
672 /* 0x4d */ { NULL
, NULL
, 0 },
673 /* 0x4e */ { NULL
, NULL
, 0 },
674 /* 0x4f */ { NULL
, NULL
, 0 },
675 /* 0x50 */ { NULL
, NULL
, 0 },
676 /* 0x51 */ { NULL
, NULL
, 0 },
677 /* 0x52 */ { NULL
, NULL
, 0 },
678 /* 0x53 */ { NULL
, NULL
, 0 },
679 /* 0x54 */ { NULL
, NULL
, 0 },
680 /* 0x55 */ { NULL
, NULL
, 0 },
681 /* 0x56 */ { NULL
, NULL
, 0 },
682 /* 0x57 */ { NULL
, NULL
, 0 },
683 /* 0x58 */ { NULL
, NULL
, 0 },
684 /* 0x59 */ { NULL
, NULL
, 0 },
685 /* 0x5a */ { NULL
, NULL
, 0 },
686 /* 0x5b */ { NULL
, NULL
, 0 },
687 /* 0x5c */ { NULL
, NULL
, 0 },
688 /* 0x5d */ { NULL
, NULL
, 0 },
689 /* 0x5e */ { NULL
, NULL
, 0 },
690 /* 0x5f */ { NULL
, NULL
, 0 },
691 /* 0x60 */ { NULL
, NULL
, 0 },
692 /* 0x61 */ { NULL
, NULL
, 0 },
693 /* 0x62 */ { NULL
, NULL
, 0 },
694 /* 0x63 */ { NULL
, NULL
, 0 },
695 /* 0x64 */ { NULL
, NULL
, 0 },
696 /* 0x65 */ { NULL
, NULL
, 0 },
697 /* 0x66 */ { NULL
, NULL
, 0 },
698 /* 0x67 */ { NULL
, NULL
, 0 },
699 /* 0x68 */ { NULL
, NULL
, 0 },
700 /* 0x69 */ { NULL
, NULL
, 0 },
701 /* 0x6a */ { NULL
, NULL
, 0 },
702 /* 0x6b */ { NULL
, NULL
, 0 },
703 /* 0x6c */ { NULL
, NULL
, 0 },
704 /* 0x6d */ { NULL
, NULL
, 0 },
705 /* 0x6e */ { NULL
, NULL
, 0 },
706 /* 0x6f */ { NULL
, NULL
, 0 },
707 /* 0x70 */ { "SMBtcon",reply_tcon
,0},
708 /* 0x71 */ { "SMBtdis",reply_tdis
,DO_CHDIR
},
709 /* 0x72 */ { "SMBnegprot",reply_negprot
,0},
710 /* 0x73 */ { "SMBsesssetupX",reply_sesssetup_and_X
,0},
711 /* 0x74 */ { "SMBulogoffX", reply_ulogoffX
, 0}, /* ulogoff doesn't give a valid TID */
712 /* 0x75 */ { "SMBtconX",reply_tcon_and_X
,0},
713 /* 0x76 */ { NULL
, NULL
, 0 },
714 /* 0x77 */ { NULL
, NULL
, 0 },
715 /* 0x78 */ { NULL
, NULL
, 0 },
716 /* 0x79 */ { NULL
, NULL
, 0 },
717 /* 0x7a */ { NULL
, NULL
, 0 },
718 /* 0x7b */ { NULL
, NULL
, 0 },
719 /* 0x7c */ { NULL
, NULL
, 0 },
720 /* 0x7d */ { NULL
, NULL
, 0 },
721 /* 0x7e */ { NULL
, NULL
, 0 },
722 /* 0x7f */ { NULL
, NULL
, 0 },
723 /* 0x80 */ { "SMBdskattr",reply_dskattr
,AS_USER
},
724 /* 0x81 */ { "SMBsearch",reply_search
,AS_USER
},
725 /* 0x82 */ { "SMBffirst",reply_search
,AS_USER
},
726 /* 0x83 */ { "SMBfunique",reply_search
,AS_USER
},
727 /* 0x84 */ { "SMBfclose",reply_fclose
,AS_USER
},
728 /* 0x85 */ { NULL
, NULL
, 0 },
729 /* 0x86 */ { NULL
, NULL
, 0 },
730 /* 0x87 */ { NULL
, NULL
, 0 },
731 /* 0x88 */ { NULL
, NULL
, 0 },
732 /* 0x89 */ { NULL
, NULL
, 0 },
733 /* 0x8a */ { NULL
, NULL
, 0 },
734 /* 0x8b */ { NULL
, NULL
, 0 },
735 /* 0x8c */ { NULL
, NULL
, 0 },
736 /* 0x8d */ { NULL
, NULL
, 0 },
737 /* 0x8e */ { NULL
, NULL
, 0 },
738 /* 0x8f */ { NULL
, NULL
, 0 },
739 /* 0x90 */ { NULL
, NULL
, 0 },
740 /* 0x91 */ { NULL
, NULL
, 0 },
741 /* 0x92 */ { NULL
, NULL
, 0 },
742 /* 0x93 */ { NULL
, NULL
, 0 },
743 /* 0x94 */ { NULL
, NULL
, 0 },
744 /* 0x95 */ { NULL
, NULL
, 0 },
745 /* 0x96 */ { NULL
, NULL
, 0 },
746 /* 0x97 */ { NULL
, NULL
, 0 },
747 /* 0x98 */ { NULL
, NULL
, 0 },
748 /* 0x99 */ { NULL
, NULL
, 0 },
749 /* 0x9a */ { NULL
, NULL
, 0 },
750 /* 0x9b */ { NULL
, NULL
, 0 },
751 /* 0x9c */ { NULL
, NULL
, 0 },
752 /* 0x9d */ { NULL
, NULL
, 0 },
753 /* 0x9e */ { NULL
, NULL
, 0 },
754 /* 0x9f */ { NULL
, NULL
, 0 },
755 /* 0xa0 */ { "SMBnttrans", reply_nttrans
, AS_USER
| CAN_IPC
},
756 /* 0xa1 */ { "SMBnttranss", reply_nttranss
, AS_USER
| CAN_IPC
},
757 /* 0xa2 */ { "SMBntcreateX", reply_ntcreate_and_X
, AS_USER
| CAN_IPC
},
758 /* 0xa3 */ { NULL
, NULL
, 0 },
759 /* 0xa4 */ { "SMBntcancel", reply_ntcancel
, 0 },
760 /* 0xa5 */ { "SMBntrename", reply_ntrename
, AS_USER
| NEED_WRITE
},
761 /* 0xa6 */ { NULL
, NULL
, 0 },
762 /* 0xa7 */ { NULL
, NULL
, 0 },
763 /* 0xa8 */ { NULL
, NULL
, 0 },
764 /* 0xa9 */ { NULL
, NULL
, 0 },
765 /* 0xaa */ { NULL
, NULL
, 0 },
766 /* 0xab */ { NULL
, NULL
, 0 },
767 /* 0xac */ { NULL
, NULL
, 0 },
768 /* 0xad */ { NULL
, NULL
, 0 },
769 /* 0xae */ { NULL
, NULL
, 0 },
770 /* 0xaf */ { NULL
, NULL
, 0 },
771 /* 0xb0 */ { NULL
, NULL
, 0 },
772 /* 0xb1 */ { NULL
, NULL
, 0 },
773 /* 0xb2 */ { NULL
, NULL
, 0 },
774 /* 0xb3 */ { NULL
, NULL
, 0 },
775 /* 0xb4 */ { NULL
, NULL
, 0 },
776 /* 0xb5 */ { NULL
, NULL
, 0 },
777 /* 0xb6 */ { NULL
, NULL
, 0 },
778 /* 0xb7 */ { NULL
, NULL
, 0 },
779 /* 0xb8 */ { NULL
, NULL
, 0 },
780 /* 0xb9 */ { NULL
, NULL
, 0 },
781 /* 0xba */ { NULL
, NULL
, 0 },
782 /* 0xbb */ { NULL
, NULL
, 0 },
783 /* 0xbc */ { NULL
, NULL
, 0 },
784 /* 0xbd */ { NULL
, NULL
, 0 },
785 /* 0xbe */ { NULL
, NULL
, 0 },
786 /* 0xbf */ { NULL
, NULL
, 0 },
787 /* 0xc0 */ { "SMBsplopen",reply_printopen
,AS_USER
},
788 /* 0xc1 */ { "SMBsplwr",reply_printwrite
,AS_USER
},
789 /* 0xc2 */ { "SMBsplclose",reply_printclose
,AS_USER
},
790 /* 0xc3 */ { "SMBsplretq",reply_printqueue
,AS_USER
},
791 /* 0xc4 */ { NULL
, NULL
, 0 },
792 /* 0xc5 */ { NULL
, NULL
, 0 },
793 /* 0xc6 */ { NULL
, NULL
, 0 },
794 /* 0xc7 */ { NULL
, NULL
, 0 },
795 /* 0xc8 */ { NULL
, NULL
, 0 },
796 /* 0xc9 */ { NULL
, NULL
, 0 },
797 /* 0xca */ { NULL
, NULL
, 0 },
798 /* 0xcb */ { NULL
, NULL
, 0 },
799 /* 0xcc */ { NULL
, NULL
, 0 },
800 /* 0xcd */ { NULL
, NULL
, 0 },
801 /* 0xce */ { NULL
, NULL
, 0 },
802 /* 0xcf */ { NULL
, NULL
, 0 },
803 /* 0xd0 */ { "SMBsends",reply_sends
,AS_GUEST
},
804 /* 0xd1 */ { "SMBsendb",NULL
,AS_GUEST
},
805 /* 0xd2 */ { "SMBfwdname",NULL
,AS_GUEST
},
806 /* 0xd3 */ { "SMBcancelf",NULL
,AS_GUEST
},
807 /* 0xd4 */ { "SMBgetmac",NULL
,AS_GUEST
},
808 /* 0xd5 */ { "SMBsendstrt",reply_sendstrt
,AS_GUEST
},
809 /* 0xd6 */ { "SMBsendend",reply_sendend
,AS_GUEST
},
810 /* 0xd7 */ { "SMBsendtxt",reply_sendtxt
,AS_GUEST
},
811 /* 0xd8 */ { NULL
, NULL
, 0 },
812 /* 0xd9 */ { NULL
, NULL
, 0 },
813 /* 0xda */ { NULL
, NULL
, 0 },
814 /* 0xdb */ { NULL
, NULL
, 0 },
815 /* 0xdc */ { NULL
, NULL
, 0 },
816 /* 0xdd */ { NULL
, NULL
, 0 },
817 /* 0xde */ { NULL
, NULL
, 0 },
818 /* 0xdf */ { NULL
, NULL
, 0 },
819 /* 0xe0 */ { NULL
, NULL
, 0 },
820 /* 0xe1 */ { NULL
, NULL
, 0 },
821 /* 0xe2 */ { NULL
, NULL
, 0 },
822 /* 0xe3 */ { NULL
, NULL
, 0 },
823 /* 0xe4 */ { NULL
, NULL
, 0 },
824 /* 0xe5 */ { NULL
, NULL
, 0 },
825 /* 0xe6 */ { NULL
, NULL
, 0 },
826 /* 0xe7 */ { NULL
, NULL
, 0 },
827 /* 0xe8 */ { NULL
, NULL
, 0 },
828 /* 0xe9 */ { NULL
, NULL
, 0 },
829 /* 0xea */ { NULL
, NULL
, 0 },
830 /* 0xeb */ { NULL
, NULL
, 0 },
831 /* 0xec */ { NULL
, NULL
, 0 },
832 /* 0xed */ { NULL
, NULL
, 0 },
833 /* 0xee */ { NULL
, NULL
, 0 },
834 /* 0xef */ { NULL
, NULL
, 0 },
835 /* 0xf0 */ { NULL
, NULL
, 0 },
836 /* 0xf1 */ { NULL
, NULL
, 0 },
837 /* 0xf2 */ { NULL
, NULL
, 0 },
838 /* 0xf3 */ { NULL
, NULL
, 0 },
839 /* 0xf4 */ { NULL
, NULL
, 0 },
840 /* 0xf5 */ { NULL
, NULL
, 0 },
841 /* 0xf6 */ { NULL
, NULL
, 0 },
842 /* 0xf7 */ { NULL
, NULL
, 0 },
843 /* 0xf8 */ { NULL
, NULL
, 0 },
844 /* 0xf9 */ { NULL
, NULL
, 0 },
845 /* 0xfa */ { NULL
, NULL
, 0 },
846 /* 0xfb */ { NULL
, NULL
, 0 },
847 /* 0xfc */ { NULL
, NULL
, 0 },
848 /* 0xfd */ { NULL
, NULL
, 0 },
849 /* 0xfe */ { NULL
, NULL
, 0 },
850 /* 0xff */ { NULL
, NULL
, 0 }
854 /*******************************************************************
855 Dump a packet to a file.
856 ********************************************************************/
858 static void smb_dump(const char *name
, int type
, char *data
, ssize_t len
)
862 if (DEBUGLEVEL
< 50) return;
864 if (len
< 4) len
= smb_len(data
)+4;
865 for (i
=1;i
<100;i
++) {
866 slprintf(fname
,sizeof(fname
)-1, "/tmp/%s.%d.%s", name
, i
,
867 type
? "req" : "resp");
868 fd
= open(fname
, O_WRONLY
|O_CREAT
|O_EXCL
, 0644);
869 if (fd
!= -1 || errno
!= EEXIST
) break;
872 ssize_t ret
= write(fd
, data
, len
);
874 DEBUG(0,("smb_dump: problem: write returned %d\n", (int)ret
));
876 DEBUG(0,("created %s len %lu\n", fname
, (unsigned long)len
));
881 /****************************************************************************
882 Do a switch on the message type, and return the response size
883 ****************************************************************************/
885 static int switch_message(int type
,char *inbuf
,char *outbuf
,int size
,int bufsize
)
887 static pid_t pid
= (pid_t
)-1;
892 if (pid
== (pid_t
)-1)
896 set_saved_ntstatus(NT_STATUS_OK
);
900 /* Make sure this is an SMB packet. smb_size contains NetBIOS header so subtract 4 from it. */
901 if ((strncmp(smb_base(inbuf
),"\377SMB",4) != 0) || (size
< (smb_size
- 4))) {
902 DEBUG(2,("Non-SMB packet of length %d. Terminating server\n",smb_len(inbuf
)));
903 exit_server_cleanly("Non-SMB packet");
907 /* yuck! this is an interim measure before we get rid of our
908 current inbuf/outbuf system */
909 global_smbpid
= SVAL(inbuf
,smb_pid
);
911 if (smb_messages
[type
].fn
== NULL
) {
912 DEBUG(0,("Unknown message type %d!\n",type
));
913 smb_dump("Unknown", 1, inbuf
, size
);
914 outsize
= reply_unknown(inbuf
,outbuf
);
916 int flags
= smb_messages
[type
].flags
;
917 static uint16 last_session_tag
= UID_FIELD_INVALID
;
918 /* In share mode security we must ignore the vuid. */
919 uint16 session_tag
= (lp_security() == SEC_SHARE
) ? UID_FIELD_INVALID
: SVAL(inbuf
,smb_uid
);
920 connection_struct
*conn
= conn_find(SVAL(inbuf
,smb_tid
));
922 DEBUG(3,("switch message %s (pid %d) conn 0x%lx\n",smb_fn_name(type
),(int)pid
,(unsigned long)conn
));
924 smb_dump(smb_fn_name(type
), 1, inbuf
, size
);
926 /* Ensure this value is replaced in the incoming packet. */
927 SSVAL(inbuf
,smb_uid
,session_tag
);
930 * Ensure the correct username is in current_user_info.
931 * This is a really ugly bugfix for problems with
932 * multiple session_setup_and_X's being done and
933 * allowing %U and %G substitutions to work correctly.
934 * There is a reason this code is done here, don't
935 * move it unless you know what you're doing... :-).
939 if (session_tag
!= last_session_tag
) {
940 user_struct
*vuser
= NULL
;
942 last_session_tag
= session_tag
;
943 if(session_tag
!= UID_FIELD_INVALID
) {
944 vuser
= get_valid_user_struct(session_tag
);
946 set_current_user_info(&vuser
->user
);
951 /* Does this call need to be run as the connected user? */
952 if (flags
& AS_USER
) {
954 /* Does this call need a valid tree connection? */
956 /* Amazingly, the error code depends on the command (from Samba4). */
957 if (type
== SMBntcreateX
) {
958 return ERROR_NT(NT_STATUS_INVALID_HANDLE
);
960 return ERROR_DOS(ERRSRV
, ERRinvnid
);
964 if (!change_to_user(conn
,session_tag
)) {
965 return(ERROR_FORCE_DOS(ERRSRV
,ERRbaduid
));
968 /* All NEED_WRITE and CAN_IPC flags must also have AS_USER. */
970 /* Does it need write permission? */
971 if ((flags
& NEED_WRITE
) && !CAN_WRITE(conn
)) {
972 return(ERROR_DOS(ERRSRV
,ERRaccess
));
975 /* IPC services are limited */
976 if (IS_IPC(conn
) && !(flags
& CAN_IPC
)) {
977 return(ERROR_DOS(ERRSRV
,ERRaccess
));
980 /* This call needs to be run as root */
981 change_to_root_user();
984 /* load service specific parameters */
986 if (!set_current_service(conn
,SVAL(inbuf
,smb_flg
),(flags
& (AS_USER
|DO_CHDIR
)?True
:False
))) {
987 return(ERROR_DOS(ERRSRV
,ERRaccess
));
989 conn
->num_smb_operations
++;
992 /* does this protocol need to be run as guest? */
993 if ((flags
& AS_GUEST
) && (!change_to_guest() ||
994 !check_access(smbd_server_fd(), lp_hostsallow(-1), lp_hostsdeny(-1)))) {
995 return(ERROR_DOS(ERRSRV
,ERRaccess
));
998 current_inbuf
= inbuf
; /* In case we need to defer this message in open... */
999 outsize
= smb_messages
[type
].fn(conn
, inbuf
,outbuf
,size
,bufsize
);
1002 smb_dump(smb_fn_name(type
), 0, outbuf
, outsize
);
1007 /****************************************************************************
1008 Construct a reply to the incoming packet.
1009 ****************************************************************************/
1011 static int construct_reply(char *inbuf
,char *outbuf
,int size
,int bufsize
)
1013 int type
= CVAL(inbuf
,smb_com
);
1015 int msg_type
= CVAL(inbuf
,0);
1022 return(reply_special(inbuf
,outbuf
));
1024 construct_reply_common(inbuf
, outbuf
);
1026 outsize
= switch_message(type
,inbuf
,outbuf
,size
,bufsize
);
1028 outsize
+= chain_size
;
1031 smb_setlen(outbuf
,outsize
- 4);
1035 /****************************************************************************
1036 Keep track of the number of running smbd's. This functionality is used to
1037 'hard' limit Samba overhead on resource constrained systems.
1038 ****************************************************************************/
1040 static BOOL process_count_update_successful
= False
;
1042 static int32
increment_smbd_process_count(void)
1046 if (lp_max_smbd_processes()) {
1048 if (tdb_change_int32_atomic(conn_tdb_ctx(), "INFO/total_smbds", &total_smbds
, 1) == -1)
1050 process_count_update_successful
= True
;
1051 return total_smbds
+ 1;
1056 void decrement_smbd_process_count(void)
1060 if (lp_max_smbd_processes() && process_count_update_successful
) {
1062 tdb_change_int32_atomic(conn_tdb_ctx(), "INFO/total_smbds", &total_smbds
, -1);
1066 static BOOL
smbd_process_limit(void)
1070 if (lp_max_smbd_processes()) {
1072 /* Always add one to the smbd process count, as exit_server() always
1076 if (!conn_tdb_ctx()) {
1077 DEBUG(0,("smbd_process_limit: max smbd processes parameter set with status parameter not \
1078 set. Ignoring max smbd restriction.\n"));
1082 total_smbds
= increment_smbd_process_count();
1083 return total_smbds
> lp_max_smbd_processes();
1089 /****************************************************************************
1090 Process an smb from the client
1091 ****************************************************************************/
1093 static void process_smb(char *inbuf
, char *outbuf
)
1095 static int trans_num
;
1096 int msg_type
= CVAL(inbuf
,0);
1097 int32 len
= smb_len(inbuf
);
1098 int nread
= len
+ 4;
1100 DO_PROFILE_INC(smb_count
);
1102 if (trans_num
== 0) {
1103 /* on the first packet, check the global hosts allow/ hosts
1104 deny parameters before doing any parsing of the packet
1105 passed to us by the client. This prevents attacks on our
1106 parsing code from hosts not in the hosts allow list */
1107 if (smbd_process_limit() ||
1108 !check_access(smbd_server_fd(), lp_hostsallow(-1), lp_hostsdeny(-1))) {
1109 /* send a negative session response "not listening on calling name" */
1110 static unsigned char buf
[5] = {0x83, 0, 0, 1, 0x81};
1111 DEBUG( 1, ( "Connection denied from %s\n", client_addr() ) );
1112 (void)send_smb(smbd_server_fd(),(char *)buf
);
1113 exit_server_cleanly("connection denied");
1117 DEBUG( 6, ( "got message type 0x%x of len 0x%x\n", msg_type
, len
) );
1118 DEBUG( 3, ( "Transaction %d of length %d\n", trans_num
, nread
) );
1122 else if(msg_type
== SMBkeepalive
)
1123 return; /* Keepalive packet. */
1125 nread
= construct_reply(inbuf
,outbuf
,nread
,max_send
);
1128 if (CVAL(outbuf
,0) == 0)
1131 if (nread
!= smb_len(outbuf
) + 4) {
1132 DEBUG(0,("ERROR: Invalid message response size! %d %d\n",
1133 nread
, smb_len(outbuf
)));
1134 } else if (!send_smb(smbd_server_fd(),outbuf
)) {
1135 exit_server_cleanly("process_smb: send_smb failed.");
1141 /****************************************************************************
1142 Return a string containing the function name of a SMB command.
1143 ****************************************************************************/
1145 const char *smb_fn_name(int type
)
1147 const char *unknown_name
= "SMBunknown";
1149 if (smb_messages
[type
].name
== NULL
)
1150 return(unknown_name
);
1152 return(smb_messages
[type
].name
);
1155 /****************************************************************************
1156 Helper functions for contruct_reply.
1157 ****************************************************************************/
1159 static uint32 common_flags2
= FLAGS2_LONG_PATH_COMPONENTS
|FLAGS2_32_BIT_ERROR_CODES
;
1161 void add_to_common_flags2(uint32 v
)
1166 void remove_from_common_flags2(uint32 v
)
1168 common_flags2
&= ~v
;
1171 void construct_reply_common(char *inbuf
,char *outbuf
)
1173 set_message(outbuf
,0,0,False
);
1175 SCVAL(outbuf
,smb_com
,CVAL(inbuf
,smb_com
));
1176 SIVAL(outbuf
,smb_rcls
,0);
1177 SCVAL(outbuf
,smb_flg
, FLAG_REPLY
| (CVAL(inbuf
,smb_flg
) & FLAG_CASELESS_PATHNAMES
));
1178 SSVAL(outbuf
,smb_flg2
,
1179 (SVAL(inbuf
,smb_flg2
) & FLAGS2_UNICODE_STRINGS
) |
1181 memset(outbuf
+smb_pidhigh
,'\0',(smb_tid
-smb_pidhigh
));
1183 SSVAL(outbuf
,smb_tid
,SVAL(inbuf
,smb_tid
));
1184 SSVAL(outbuf
,smb_pid
,SVAL(inbuf
,smb_pid
));
1185 SSVAL(outbuf
,smb_uid
,SVAL(inbuf
,smb_uid
));
1186 SSVAL(outbuf
,smb_mid
,SVAL(inbuf
,smb_mid
));
1189 /****************************************************************************
1190 Construct a chained reply and add it to the already made reply
1191 ****************************************************************************/
1193 int chain_reply(char *inbuf
,char *outbuf
,int size
,int bufsize
)
1195 static char *orig_inbuf
;
1196 static char *orig_outbuf
;
1197 int smb_com1
, smb_com2
= CVAL(inbuf
,smb_vwv0
);
1198 unsigned smb_off2
= SVAL(inbuf
,smb_vwv1
);
1199 char *inbuf2
, *outbuf2
;
1201 char inbuf_saved
[smb_wct
];
1202 char outbuf_saved
[smb_wct
];
1203 int outsize
= smb_len(outbuf
) + 4;
1205 /* maybe its not chained */
1206 if (smb_com2
== 0xFF) {
1207 SCVAL(outbuf
,smb_vwv0
,0xFF);
1211 if (chain_size
== 0) {
1212 /* this is the first part of the chain */
1214 orig_outbuf
= outbuf
;
1218 * The original Win95 redirector dies on a reply to
1219 * a lockingX and read chain unless the chain reply is
1220 * 4 byte aligned. JRA.
1223 outsize
= (outsize
+ 3) & ~3;
1225 /* we need to tell the client where the next part of the reply will be */
1226 SSVAL(outbuf
,smb_vwv1
,smb_offset(outbuf
+outsize
,outbuf
));
1227 SCVAL(outbuf
,smb_vwv0
,smb_com2
);
1229 /* remember how much the caller added to the chain, only counting stuff
1230 after the parameter words */
1231 chain_size
+= outsize
- smb_wct
;
1233 /* work out pointers into the original packets. The
1234 headers on these need to be filled in */
1235 inbuf2
= orig_inbuf
+ smb_off2
+ 4 - smb_wct
;
1236 outbuf2
= orig_outbuf
+ SVAL(outbuf
,smb_vwv1
) + 4 - smb_wct
;
1238 /* remember the original command type */
1239 smb_com1
= CVAL(orig_inbuf
,smb_com
);
1241 /* save the data which will be overwritten by the new headers */
1242 memcpy(inbuf_saved
,inbuf2
,smb_wct
);
1243 memcpy(outbuf_saved
,outbuf2
,smb_wct
);
1245 /* give the new packet the same header as the last part of the SMB */
1246 memmove(inbuf2
,inbuf
,smb_wct
);
1248 /* create the in buffer */
1249 SCVAL(inbuf2
,smb_com
,smb_com2
);
1251 /* create the out buffer */
1252 construct_reply_common(inbuf2
, outbuf2
);
1254 DEBUG(3,("Chained message\n"));
1257 /* process the request */
1258 outsize2
= switch_message(smb_com2
,inbuf2
,outbuf2
,size
-chain_size
,
1259 bufsize
-chain_size
);
1261 /* copy the new reply and request headers over the old ones, but
1262 preserve the smb_com field */
1263 memmove(orig_outbuf
,outbuf2
,smb_wct
);
1264 SCVAL(orig_outbuf
,smb_com
,smb_com1
);
1266 /* restore the saved data, being careful not to overwrite any
1267 data from the reply header */
1268 memcpy(inbuf2
,inbuf_saved
,smb_wct
);
1271 int ofs
= smb_wct
- PTR_DIFF(outbuf2
,orig_outbuf
);
1272 if (ofs
< 0) ofs
= 0;
1273 memmove(outbuf2
+ofs
,outbuf_saved
+ofs
,smb_wct
-ofs
);
1279 /****************************************************************************
1280 Setup the needed select timeout.
1281 ****************************************************************************/
1283 static int setup_select_timeout(void)
1288 select_timeout
= blocking_locks_timeout(SMBD_SELECT_TIMEOUT
);
1289 select_timeout
*= 1000;
1291 t
= change_notify_timeout();
1292 DEBUG(10, ("change_notify_timeout: %d\n", t
));
1294 select_timeout
= MIN(select_timeout
, t
*1000);
1296 if (print_notify_messages_pending())
1297 select_timeout
= MIN(select_timeout
, 1000);
1299 return select_timeout
;
1302 /****************************************************************************
1303 Check if services need reloading.
1304 ****************************************************************************/
1306 void check_reload(time_t t
)
1308 static pid_t mypid
= 0;
1309 static time_t last_smb_conf_reload_time
= 0;
1310 static time_t last_printer_reload_time
= 0;
1311 time_t printcap_cache_time
= (time_t)lp_printcap_cache_time();
1313 if(last_smb_conf_reload_time
== 0) {
1314 last_smb_conf_reload_time
= t
;
1315 /* Our printing subsystem might not be ready at smbd start up.
1316 Then no printer is available till the first printers check
1317 is performed. A lower initial interval circumvents this. */
1318 if ( printcap_cache_time
> 60 )
1319 last_printer_reload_time
= t
- printcap_cache_time
+ 60;
1321 last_printer_reload_time
= t
;
1324 if (mypid
!= getpid()) { /* First time or fork happened meanwhile */
1325 /* randomize over 60 second the printcap reload to avoid all
1326 * process hitting cupsd at the same time */
1327 int time_range
= 60;
1329 last_printer_reload_time
+= random() % time_range
;
1333 if (reload_after_sighup
|| (t
>= last_smb_conf_reload_time
+SMBD_RELOAD_CHECK
)) {
1334 reload_services(True
);
1335 reload_after_sighup
= False
;
1336 last_smb_conf_reload_time
= t
;
1339 /* 'printcap cache time = 0' disable the feature */
1341 if ( printcap_cache_time
!= 0 )
1343 /* see if it's time to reload or if the clock has been set back */
1345 if ( (t
>= last_printer_reload_time
+printcap_cache_time
)
1346 || (t
-last_printer_reload_time
< 0) )
1348 DEBUG( 3,( "Printcap cache time expired.\n"));
1350 last_printer_reload_time
= t
;
1355 /****************************************************************************
1356 Process any timeout housekeeping. Return False if the caller should exit.
1357 ****************************************************************************/
1359 static BOOL
timeout_processing(int deadtime
, int *select_timeout
, time_t *last_timeout_processing_time
)
1361 static time_t last_keepalive_sent_time
= 0;
1362 static time_t last_idle_closed_check
= 0;
1364 BOOL allidle
= True
;
1366 if (smb_read_error
== READ_EOF
) {
1367 DEBUG(3,("timeout_processing: End of file from client (client has disconnected).\n"));
1371 if (smb_read_error
== READ_ERROR
) {
1372 DEBUG(3,("timeout_processing: receive_smb error (%s) Exiting\n",
1377 if (smb_read_error
== READ_BAD_SIG
) {
1378 DEBUG(3,("timeout_processing: receive_smb error bad smb signature. Exiting\n"));
1382 *last_timeout_processing_time
= t
= time(NULL
);
1384 if(last_keepalive_sent_time
== 0)
1385 last_keepalive_sent_time
= t
;
1387 if(last_idle_closed_check
== 0)
1388 last_idle_closed_check
= t
;
1390 /* become root again if waiting */
1391 change_to_root_user();
1393 /* run all registered idle events */
1394 smb_run_idle_events(t
);
1396 /* check if we need to reload services */
1399 /* automatic timeout if all connections are closed */
1400 if (conn_num_open()==0 && (t
- last_idle_closed_check
) >= IDLE_CLOSED_TIMEOUT
) {
1401 DEBUG( 2, ( "Closing idle connection\n" ) );
1404 last_idle_closed_check
= t
;
1407 if (keepalive
&& (t
- last_keepalive_sent_time
)>keepalive
) {
1408 if (!send_keepalive(smbd_server_fd())) {
1409 DEBUG( 2, ( "Keepalive failed - exiting.\n" ) );
1413 /* send a keepalive for a password server or the like.
1414 This is attached to the auth_info created in the
1416 if (negprot_global_auth_context
&& negprot_global_auth_context
->challenge_set_method
1417 && negprot_global_auth_context
->challenge_set_method
->send_keepalive
) {
1419 negprot_global_auth_context
->challenge_set_method
->send_keepalive
1420 (&negprot_global_auth_context
->challenge_set_method
->private_data
);
1423 last_keepalive_sent_time
= t
;
1426 /* check for connection timeouts */
1427 allidle
= conn_idle_all(t
, deadtime
);
1429 if (allidle
&& conn_num_open()>0) {
1430 DEBUG(2,("Closing idle connection 2.\n"));
1434 if(global_machine_password_needs_changing
&&
1435 /* for ADS we need to do a regular ADS password change, not a domain
1437 lp_security() == SEC_DOMAIN
) {
1439 unsigned char trust_passwd_hash
[16];
1443 * We're in domain level security, and the code that
1444 * read the machine password flagged that the machine
1445 * password needs changing.
1449 * First, open the machine password file with an exclusive lock.
1452 if (secrets_lock_trust_account_password(lp_workgroup(), True
) == False
) {
1453 DEBUG(0,("process: unable to lock the machine account password for \
1454 machine %s in domain %s.\n", global_myname(), lp_workgroup() ));
1458 if(!secrets_fetch_trust_account_password(lp_workgroup(), trust_passwd_hash
, &lct
, NULL
)) {
1459 DEBUG(0,("process: unable to read the machine account password for \
1460 machine %s in domain %s.\n", global_myname(), lp_workgroup()));
1461 secrets_lock_trust_account_password(lp_workgroup(), False
);
1466 * Make sure someone else hasn't already done this.
1469 if(t
< lct
+ lp_machine_password_timeout()) {
1470 global_machine_password_needs_changing
= False
;
1471 secrets_lock_trust_account_password(lp_workgroup(), False
);
1475 /* always just contact the PDC here */
1477 change_trust_account_password( lp_workgroup(), NULL
);
1478 global_machine_password_needs_changing
= False
;
1479 secrets_lock_trust_account_password(lp_workgroup(), False
);
1483 * Check to see if we have any blocking locks
1484 * outstanding on the queue.
1486 process_blocking_lock_queue(t
);
1488 /* update printer queue caches if necessary */
1490 update_monitored_printq_cache();
1493 * Check to see if we have any change notifies
1494 * outstanding on the queue.
1496 process_pending_change_notify_queue(t
);
1499 * Now we are root, check if the log files need pruning.
1500 * Force a log file check.
1502 force_check_log_size();
1505 /* Send any queued printer notify message to interested smbd's. */
1507 print_notify_send_messages(0);
1510 * Modify the select timeout depending upon
1511 * what we have remaining in our queues.
1514 *select_timeout
= setup_select_timeout();
1519 /****************************************************************************
1520 Accessor functions for InBuffer, OutBuffer.
1521 ****************************************************************************/
1523 char *get_InBuffer(void)
1528 void set_InBuffer(char *new_inbuf
)
1530 InBuffer
= new_inbuf
;
1531 current_inbuf
= InBuffer
;
1534 char *get_OutBuffer(void)
1539 void set_OutBuffer(char *new_outbuf
)
1541 OutBuffer
= new_outbuf
;
1544 /****************************************************************************
1545 Free an InBuffer. Checks if not in use by aio system.
1546 Must have been allocated by NewInBuffer.
1547 ****************************************************************************/
1549 void free_InBuffer(char *inbuf
)
1551 if (!aio_inbuffer_in_use(inbuf
)) {
1552 if (current_inbuf
== inbuf
) {
1553 current_inbuf
= NULL
;
1559 /****************************************************************************
1560 Free an OutBuffer. No outbuffers currently stolen by aio system.
1561 Must have been allocated by NewInBuffer.
1562 ****************************************************************************/
1564 void free_OutBuffer(char *outbuf
)
1569 const int total_buffer_size
= (BUFFER_SIZE
+ LARGE_WRITEX_HDR_SIZE
+ SAFETY_MARGIN
);
1571 /****************************************************************************
1572 Allocate a new InBuffer. Returns the new and old ones.
1573 ****************************************************************************/
1575 char *NewInBuffer(char **old_inbuf
)
1577 char *new_inbuf
= (char *)SMB_MALLOC(total_buffer_size
);
1582 *old_inbuf
= InBuffer
;
1584 InBuffer
= new_inbuf
;
1585 #if defined(DEVELOPER)
1586 clobber_region(SAFE_STRING_FUNCTION_NAME
, SAFE_STRING_LINE
, InBuffer
, total_buffer_size
);
1591 /****************************************************************************
1592 Allocate a new OutBuffer. Returns the new and old ones.
1593 ****************************************************************************/
1595 char *NewOutBuffer(char **old_outbuf
)
1597 char *new_outbuf
= (char *)SMB_MALLOC(total_buffer_size
);
1602 *old_outbuf
= OutBuffer
;
1604 OutBuffer
= new_outbuf
;
1605 #if defined(DEVELOPER)
1606 clobber_region(SAFE_STRING_FUNCTION_NAME
, SAFE_STRING_LINE
, OutBuffer
, total_buffer_size
);
1611 /****************************************************************************
1612 Process commands from the client
1613 ****************************************************************************/
1615 void smbd_process(void)
1617 time_t last_timeout_processing_time
= time(NULL
);
1618 unsigned int num_smbs
= 0;
1620 /* Allocate the primary Inbut/Output buffers. */
1622 if ((NewInBuffer(NULL
) == NULL
) || (NewOutBuffer(NULL
) == NULL
))
1625 max_recv
= MIN(lp_maxxmit(),BUFFER_SIZE
);
1628 int deadtime
= lp_deadtime()*60;
1629 int select_timeout
= setup_select_timeout();
1633 deadtime
= DEFAULT_SMBD_TIMEOUT
;
1637 /* free up temporary memory */
1639 main_loop_TALLOC_FREE();
1641 /* Did someone ask for immediate checks on things like blocking locks ? */
1642 if (select_timeout
== 0) {
1643 if(!timeout_processing( deadtime
, &select_timeout
, &last_timeout_processing_time
))
1645 num_smbs
= 0; /* Reset smb counter. */
1650 #if defined(DEVELOPER)
1651 clobber_region(SAFE_STRING_FUNCTION_NAME
, SAFE_STRING_LINE
, InBuffer
, total_buffer_size
);
1654 while (!receive_message_or_smb(InBuffer
,BUFFER_SIZE
+LARGE_WRITEX_HDR_SIZE
,select_timeout
)) {
1655 if(!timeout_processing( deadtime
, &select_timeout
, &last_timeout_processing_time
))
1657 num_smbs
= 0; /* Reset smb counter. */
1661 * Ensure we do timeout processing if the SMB we just got was
1662 * only an echo request. This allows us to set the select
1663 * timeout in 'receive_message_or_smb()' to any value we like
1664 * without worrying that the client will send echo requests
1665 * faster than the select timeout, thus starving out the
1666 * essential processing (change notify, blocking locks) that
1667 * the timeout code does. JRA.
1669 num_echos
= smb_echo_count
;
1671 clobber_region(SAFE_STRING_FUNCTION_NAME
, SAFE_STRING_LINE
, OutBuffer
, total_buffer_size
);
1673 process_smb(InBuffer
, OutBuffer
);
1675 if (smb_echo_count
!= num_echos
) {
1676 if(!timeout_processing( deadtime
, &select_timeout
, &last_timeout_processing_time
))
1678 num_smbs
= 0; /* Reset smb counter. */
1684 * If we are getting smb requests in a constant stream
1685 * with no echos, make sure we attempt timeout processing
1686 * every select_timeout milliseconds - but only check for this
1687 * every 200 smb requests.
1690 if ((num_smbs
% 200) == 0) {
1691 time_t new_check_time
= time(NULL
);
1692 if(new_check_time
- last_timeout_processing_time
>= (select_timeout
/1000)) {
1693 if(!timeout_processing( deadtime
, &select_timeout
, &last_timeout_processing_time
))
1695 num_smbs
= 0; /* Reset smb counter. */
1696 last_timeout_processing_time
= new_check_time
; /* Reset time. */
1700 /* The timeout_processing function isn't run nearly
1701 often enough to implement 'max log size' without
1702 overrunning the size of the file by many megabytes.
1703 This is especially true if we are running at debug
1704 level 10. Checking every 50 SMBs is a nice
1705 tradeoff of performance vs log file size overrun. */
1707 if ((num_smbs
% 50) == 0 && need_to_check_log_size()) {
1708 change_to_root_user();