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.
25 extern struct auth_context *negprot_global_auth_context;
26 extern int smb_echo_count;
28 static char *InBuffer = NULL;
29 static char *OutBuffer = NULL;
30 static char *current_inbuf = NULL;
33 * Size of data we can send to client. Set
34 * by the client for all protocols above CORE.
35 * Set by us for CORE protocol.
37 int max_send = BUFFER_SIZE;
39 * Size of the data we can receive. Set by us.
40 * Can be modified by the max xmit parameter.
42 int max_recv = BUFFER_SIZE;
44 extern int last_message;
45 extern int smb_read_error;
46 SIG_ATOMIC_T reload_after_sighup = 0;
47 SIG_ATOMIC_T got_sig_term = 0;
48 extern BOOL global_machine_password_needs_changing;
51 /****************************************************************************
52 Function to return the current request mid from Inbuffer.
53 ****************************************************************************/
55 uint16 get_current_mid(void)
57 return SVAL(InBuffer,smb_mid);
60 /****************************************************************************
61 structure to hold a linked list of queued messages.
63 ****************************************************************************/
65 static struct pending_message_list *deferred_open_queue;
67 /****************************************************************************
68 Function to push a message onto the tail of a linked list of smb messages
70 ****************************************************************************/
72 static BOOL push_queued_message(char *buf, int msg_len,
73 struct timeval request_time,
74 struct timeval end_time,
75 char *private_data, size_t private_len)
77 struct pending_message_list *msg;
79 msg = TALLOC_ZERO_P(NULL, struct pending_message_list);
82 DEBUG(0,("push_message: malloc fail (1)\n"));
86 msg->buf = data_blob_talloc(msg, buf, msg_len);
87 if(msg->buf.data == NULL) {
88 DEBUG(0,("push_message: malloc fail (2)\n"));
93 msg->request_time = request_time;
94 msg->end_time = end_time;
97 msg->private_data = data_blob_talloc(msg, private_data,
99 if (msg->private_data.data == NULL) {
100 DEBUG(0,("push_message: malloc fail (3)\n"));
106 DLIST_ADD_END(deferred_open_queue, msg, struct pending_message_list *);
108 DEBUG(10,("push_message: pushed message length %u on "
109 "deferred_open_queue\n", (unsigned int)msg_len));
114 /****************************************************************************
115 Function to delete a sharing violation open message by mid.
116 ****************************************************************************/
118 void remove_deferred_open_smb_message(uint16 mid)
120 struct pending_message_list *pml;
122 for (pml = deferred_open_queue; pml; pml = pml->next) {
123 if (mid == SVAL(pml->buf.data,smb_mid)) {
124 DEBUG(10,("remove_deferred_open_smb_message: "
125 "deleting mid %u len %u\n",
127 (unsigned int)pml->buf.length ));
128 DLIST_REMOVE(deferred_open_queue, pml);
135 /****************************************************************************
136 Move a sharing violation open retry message to the front of the list and
137 schedule it for immediate processing.
138 ****************************************************************************/
140 void schedule_deferred_open_smb_message(uint16 mid)
142 struct pending_message_list *pml;
145 for (pml = deferred_open_queue; pml; pml = pml->next) {
146 uint16 msg_mid = SVAL(pml->buf.data,smb_mid);
147 DEBUG(10, ("schedule_deferred_open_smb_message: [%d] "
148 "msg_mid = %u\n", i++, (unsigned int)msg_mid ));
149 if (mid == msg_mid) {
150 DEBUG(10, ("schedule_deferred_open_smb_message: "
151 "scheduling mid %u\n", mid));
152 pml->end_time.tv_sec = 0;
153 pml->end_time.tv_usec = 0;
154 DLIST_PROMOTE(deferred_open_queue, pml);
159 DEBUG(10, ("schedule_deferred_open_smb_message: failed to find "
160 "message mid %u\n", mid ));
163 /****************************************************************************
164 Return true if this mid is on the deferred queue.
165 ****************************************************************************/
167 BOOL open_was_deferred(uint16 mid)
169 struct pending_message_list *pml;
171 for (pml = deferred_open_queue; pml; pml = pml->next) {
172 if (SVAL(pml->buf.data,smb_mid) == mid) {
179 /****************************************************************************
180 Return the message queued by this mid.
181 ****************************************************************************/
183 struct pending_message_list *get_open_deferred_message(uint16 mid)
185 struct pending_message_list *pml;
187 for (pml = deferred_open_queue; pml; pml = pml->next) {
188 if (SVAL(pml->buf.data,smb_mid) == mid) {
195 /****************************************************************************
196 Function to push a deferred open smb message onto a linked list of local smb
197 messages ready for processing.
198 ****************************************************************************/
200 BOOL push_deferred_smb_message(uint16 mid,
201 struct timeval request_time,
202 struct timeval timeout,
203 char *private_data, size_t priv_len)
205 struct timeval end_time;
207 end_time = timeval_sum(&request_time, &timeout);
209 DEBUG(10,("push_deferred_open_smb_message: pushing message len %u mid %u "
210 "timeout time [%u.%06u]\n",
211 (unsigned int) smb_len(current_inbuf)+4, (unsigned int)mid,
212 (unsigned int)end_time.tv_sec,
213 (unsigned int)end_time.tv_usec));
215 return push_queued_message(current_inbuf, smb_len(current_inbuf)+4,
216 request_time, end_time,
217 private_data, priv_len);
221 struct timed_event *te;
222 struct timeval interval;
224 BOOL (*handler)(const struct timeval *now, void *private_data);
228 static void idle_event_handler(struct event_context *ctx,
229 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 = event_add_timed(ctx, event,
245 timeval_sum(now, &event->interval),
247 idle_event_handler, event);
249 /* We can't do much but fail here. */
250 SMB_ASSERT(event->te != NULL);
253 struct idle_event *event_add_idle(struct event_context *event_ctx,
255 struct timeval interval,
257 BOOL (*handler)(const struct timeval *now,
261 struct idle_event *result;
262 struct timeval now = timeval_current();
264 result = TALLOC_P(mem_ctx, struct idle_event);
265 if (result == NULL) {
266 DEBUG(0, ("talloc failed\n"));
270 result->interval = interval;
271 result->handler = handler;
272 result->private_data = private_data;
274 if (!(result->name = talloc_asprintf(result, "idle_evt(%s)", name))) {
275 DEBUG(0, ("talloc failed\n"));
280 result->te = event_add_timed(event_ctx, result,
281 timeval_sum(&now, &interval),
283 idle_event_handler, result);
284 if (result->te == NULL) {
285 DEBUG(0, ("event_add_timed failed\n"));
293 /****************************************************************************
294 Do all async processing in here. This includes kernel oplock messages, change
296 ****************************************************************************/
298 static void async_processing(fd_set *pfds)
300 DEBUG(10,("async_processing: Doing async processing.\n"));
304 process_kernel_oplocks(smbd_messaging_context(), pfds);
306 /* Do the aio check again after receive_local_message as it does a
307 select and may have eaten our signal. */
308 /* Is this till true? -- vl */
312 exit_server_cleanly("termination signal");
315 /* check for sighup processing */
316 if (reload_after_sighup) {
317 change_to_root_user();
318 DEBUG(1,("Reloading services after SIGHUP\n"));
319 reload_services(False);
320 reload_after_sighup = 0;
324 /****************************************************************************
325 Add a fd to the set we will be select(2)ing on.
326 ****************************************************************************/
328 static int select_on_fd(int fd, int maxfd, fd_set *fds)
332 maxfd = MAX(maxfd, fd);
338 /****************************************************************************
339 Do a select on an two fd's - with timeout.
341 If a local udp message has been pushed onto the
342 queue (this can only happen during oplock break
343 processing) call async_processing()
345 If a pending smb message has been pushed onto the
346 queue (this can only happen during oplock break
347 processing) return this next.
349 If the first smbfd is ready then read an smb from it.
350 if the second (loopback UDP) fd is ready then read a message
351 from it and setup the buffer header to identify the length
353 Returns False on timeout or error.
356 The timeout is in milliseconds
357 ****************************************************************************/
359 static BOOL receive_message_or_smb(char *buffer, int buffer_len, int timeout)
371 to.tv_sec = timeout / 1000;
372 to.tv_usec = (timeout % 1000) * 1000;
374 to.tv_sec = SMBD_SELECT_TIMEOUT;
379 * Note that this call must be before processing any SMB
380 * messages as we need to synchronously process any messages
381 * we may have sent to ourselves from the previous SMB.
383 message_dispatch(smbd_messaging_context());
386 * Check to see if we already have a message on the deferred open queue
387 * and it's time to schedule.
389 if(deferred_open_queue != NULL) {
390 BOOL pop_message = False;
391 struct pending_message_list *msg = deferred_open_queue;
393 if (timeval_is_zero(&msg->end_time)) {
400 tdif = usec_time_diff(&msg->end_time, &tv);
402 /* Timed out. Schedule...*/
404 DEBUG(10,("receive_message_or_smb: queued message timed out.\n"));
406 /* Make a more accurate select timeout. */
407 to.tv_sec = tdif / 1000000;
408 to.tv_usec = tdif % 1000000;
409 DEBUG(10,("receive_message_or_smb: select with timeout of [%u.%06u]\n",
410 (unsigned int)to.tv_sec, (unsigned int)to.tv_usec ));
415 memcpy(buffer, msg->buf.data, MIN(buffer_len, msg->buf.length));
417 /* We leave this message on the queue so the open code can
418 know this is a retry. */
419 DEBUG(5,("receive_message_or_smb: returning deferred open smb message.\n"));
425 * Setup the select fd sets.
432 * Ensure we process oplock break messages by preference.
433 * We have to do this before the select, after the select
434 * and if the select returns EINTR. This is due to the fact
435 * that the selects called from async_processing can eat an EINTR
436 * caused by a signal (we can't take the break message there).
437 * This is hideously complex - *MUST* be simplified for 3.0 ! JRA.
440 if (oplock_message_waiting(&r_fds)) {
441 DEBUG(10,("receive_message_or_smb: oplock_message is waiting.\n"));
442 async_processing(&r_fds);
444 * After async processing we must go and do the select again, as
445 * the state of the flag in fds for the server file descriptor is
446 * indeterminate - we may have done I/O on it in the oplock processing. JRA.
452 * Are there any timed events waiting ? If so, ensure we don't
453 * select for longer than it would take to wait for them.
460 event_add_to_select_args(smbd_event_context(), &now,
461 &r_fds, &w_fds, &to, &maxfd);
464 if (timeval_is_zero(&to)) {
465 /* Process a timed event now... */
466 if (run_events(smbd_event_context(), 0, NULL, NULL)) {
473 START_PROFILE(smbd_idle);
475 maxfd = select_on_fd(smbd_server_fd(), maxfd, &r_fds);
476 maxfd = select_on_fd(oplock_notify_fd(), maxfd, &r_fds);
478 selrtn = sys_select(maxfd+1,&r_fds,&w_fds,NULL,&to);
481 END_PROFILE(smbd_idle);
485 if (run_events(smbd_event_context(), selrtn, &r_fds, &w_fds)) {
489 /* if we get EINTR then maybe we have received an oplock
490 signal - treat this as select returning 1. This is ugly, but
491 is the best we can do until the oplock code knows more about
493 if (selrtn == -1 && errno == EINTR) {
494 async_processing(&r_fds);
496 * After async processing we must go and do the select again, as
497 * the state of the flag in fds for the server file descriptor is
498 * indeterminate - we may have done I/O on it in the oplock processing. JRA.
505 /* something is wrong. Maybe the socket is dead? */
506 smb_read_error = READ_ERROR;
510 /* Did we timeout ? */
512 smb_read_error = READ_TIMEOUT;
517 * Ensure we process oplock break messages by preference.
518 * This is IMPORTANT ! Otherwise we can starve other processes
519 * sending us an oplock break message. JRA.
522 if (oplock_message_waiting(&r_fds)) {
523 async_processing(&r_fds);
525 * After async processing we must go and do the select again, as
526 * the state of the flag in fds for the server file descriptor is
527 * indeterminate - we may have done I/O on it in the oplock processing. JRA.
532 return receive_smb(smbd_server_fd(), buffer, 0);
536 * Only allow 5 outstanding trans requests. We're allocating memory, so
540 NTSTATUS allow_new_trans(struct trans_state *list, int mid)
543 for (; list != NULL; list = list->next) {
545 if (list->mid == mid) {
546 return NT_STATUS_INVALID_PARAMETER;
552 return NT_STATUS_INSUFFICIENT_RESOURCES;
558 /****************************************************************************
559 We're terminating and have closed all our files/connections etc.
560 If there are any pending local messages we need to respond to them
561 before termination so that other smbds don't think we just died whilst
563 ****************************************************************************/
565 void respond_to_all_remaining_local_messages(void)
568 * Assert we have no exclusive open oplocks.
571 if(get_number_of_exclusive_open_oplocks()) {
572 DEBUG(0,("respond_to_all_remaining_local_messages: PANIC : we have %d exclusive oplocks.\n",
573 get_number_of_exclusive_open_oplocks() ));
577 process_kernel_oplocks(smbd_messaging_context(), NULL);
584 These flags determine some of the permissions required to do an operation
586 Note that I don't set NEED_WRITE on some write operations because they
587 are used by some brain-dead clients when printing, and I don't want to
588 force write permissions on print services.
590 #define AS_USER (1<<0)
591 #define NEED_WRITE (1<<1) /* Must be paired with AS_USER */
592 #define TIME_INIT (1<<2)
593 #define CAN_IPC (1<<3) /* Must be paired with AS_USER */
594 #define AS_GUEST (1<<5) /* Must *NOT* be paired with AS_USER */
595 #define DO_CHDIR (1<<6)
598 define a list of possible SMB messages and their corresponding
599 functions. Any message that has a NULL function is unimplemented -
600 please feel free to contribute implementations!
602 static const struct smb_message_struct {
604 int (*fn)(connection_struct *conn, char *, char *, int, int);
606 } smb_messages[256] = {
608 /* 0x00 */ { "SMBmkdir",reply_mkdir,AS_USER | NEED_WRITE},
609 /* 0x01 */ { "SMBrmdir",reply_rmdir,AS_USER | NEED_WRITE},
610 /* 0x02 */ { "SMBopen",reply_open,AS_USER },
611 /* 0x03 */ { "SMBcreate",reply_mknew,AS_USER},
612 /* 0x04 */ { "SMBclose",reply_close,AS_USER | CAN_IPC },
613 /* 0x05 */ { "SMBflush",reply_flush,AS_USER},
614 /* 0x06 */ { "SMBunlink",reply_unlink,AS_USER | NEED_WRITE },
615 /* 0x07 */ { "SMBmv",reply_mv,AS_USER | NEED_WRITE },
616 /* 0x08 */ { "SMBgetatr",reply_getatr,AS_USER},
617 /* 0x09 */ { "SMBsetatr",reply_setatr,AS_USER | NEED_WRITE},
618 /* 0x0a */ { "SMBread",reply_read,AS_USER},
619 /* 0x0b */ { "SMBwrite",reply_write,AS_USER | CAN_IPC },
620 /* 0x0c */ { "SMBlock",reply_lock,AS_USER},
621 /* 0x0d */ { "SMBunlock",reply_unlock,AS_USER},
622 /* 0x0e */ { "SMBctemp",reply_ctemp,AS_USER },
623 /* 0x0f */ { "SMBmknew",reply_mknew,AS_USER},
624 /* 0x10 */ { "SMBcheckpath",reply_checkpath,AS_USER},
625 /* 0x11 */ { "SMBexit",reply_exit,DO_CHDIR},
626 /* 0x12 */ { "SMBlseek",reply_lseek,AS_USER},
627 /* 0x13 */ { "SMBlockread",reply_lockread,AS_USER},
628 /* 0x14 */ { "SMBwriteunlock",reply_writeunlock,AS_USER},
629 /* 0x15 */ { NULL, NULL, 0 },
630 /* 0x16 */ { NULL, NULL, 0 },
631 /* 0x17 */ { NULL, NULL, 0 },
632 /* 0x18 */ { NULL, NULL, 0 },
633 /* 0x19 */ { NULL, NULL, 0 },
634 /* 0x1a */ { "SMBreadbraw",reply_readbraw,AS_USER},
635 /* 0x1b */ { "SMBreadBmpx",reply_readbmpx,AS_USER},
636 /* 0x1c */ { "SMBreadBs",NULL,0 },
637 /* 0x1d */ { "SMBwritebraw",reply_writebraw,AS_USER},
638 /* 0x1e */ { "SMBwriteBmpx",reply_writebmpx,AS_USER},
639 /* 0x1f */ { "SMBwriteBs",reply_writebs,AS_USER},
640 /* 0x20 */ { "SMBwritec",NULL,0},
641 /* 0x21 */ { NULL, NULL, 0 },
642 /* 0x22 */ { "SMBsetattrE",reply_setattrE,AS_USER | NEED_WRITE },
643 /* 0x23 */ { "SMBgetattrE",reply_getattrE,AS_USER },
644 /* 0x24 */ { "SMBlockingX",reply_lockingX,AS_USER },
645 /* 0x25 */ { "SMBtrans",reply_trans,AS_USER | CAN_IPC },
646 /* 0x26 */ { "SMBtranss",reply_transs,AS_USER | CAN_IPC},
647 /* 0x27 */ { "SMBioctl",reply_ioctl,0},
648 /* 0x28 */ { "SMBioctls",NULL,AS_USER},
649 /* 0x29 */ { "SMBcopy",reply_copy,AS_USER | NEED_WRITE },
650 /* 0x2a */ { "SMBmove",NULL,AS_USER | NEED_WRITE },
651 /* 0x2b */ { "SMBecho",reply_echo,0},
652 /* 0x2c */ { "SMBwriteclose",reply_writeclose,AS_USER},
653 /* 0x2d */ { "SMBopenX",reply_open_and_X,AS_USER | CAN_IPC },
654 /* 0x2e */ { "SMBreadX",reply_read_and_X,AS_USER | CAN_IPC },
655 /* 0x2f */ { "SMBwriteX",reply_write_and_X,AS_USER | CAN_IPC },
656 /* 0x30 */ { NULL, NULL, 0 },
657 /* 0x31 */ { NULL, NULL, 0 },
658 /* 0x32 */ { "SMBtrans2", reply_trans2, AS_USER | CAN_IPC },
659 /* 0x33 */ { "SMBtranss2", reply_transs2, AS_USER},
660 /* 0x34 */ { "SMBfindclose", reply_findclose,AS_USER},
661 /* 0x35 */ { "SMBfindnclose", reply_findnclose, AS_USER},
662 /* 0x36 */ { NULL, NULL, 0 },
663 /* 0x37 */ { NULL, NULL, 0 },
664 /* 0x38 */ { NULL, NULL, 0 },
665 /* 0x39 */ { NULL, NULL, 0 },
666 /* 0x3a */ { NULL, NULL, 0 },
667 /* 0x3b */ { NULL, NULL, 0 },
668 /* 0x3c */ { NULL, NULL, 0 },
669 /* 0x3d */ { NULL, NULL, 0 },
670 /* 0x3e */ { NULL, NULL, 0 },
671 /* 0x3f */ { NULL, NULL, 0 },
672 /* 0x40 */ { NULL, NULL, 0 },
673 /* 0x41 */ { NULL, NULL, 0 },
674 /* 0x42 */ { NULL, NULL, 0 },
675 /* 0x43 */ { NULL, NULL, 0 },
676 /* 0x44 */ { NULL, NULL, 0 },
677 /* 0x45 */ { NULL, NULL, 0 },
678 /* 0x46 */ { NULL, NULL, 0 },
679 /* 0x47 */ { NULL, NULL, 0 },
680 /* 0x48 */ { NULL, NULL, 0 },
681 /* 0x49 */ { NULL, NULL, 0 },
682 /* 0x4a */ { NULL, NULL, 0 },
683 /* 0x4b */ { NULL, NULL, 0 },
684 /* 0x4c */ { NULL, NULL, 0 },
685 /* 0x4d */ { NULL, NULL, 0 },
686 /* 0x4e */ { NULL, NULL, 0 },
687 /* 0x4f */ { NULL, NULL, 0 },
688 /* 0x50 */ { NULL, NULL, 0 },
689 /* 0x51 */ { NULL, NULL, 0 },
690 /* 0x52 */ { NULL, NULL, 0 },
691 /* 0x53 */ { NULL, NULL, 0 },
692 /* 0x54 */ { NULL, NULL, 0 },
693 /* 0x55 */ { NULL, NULL, 0 },
694 /* 0x56 */ { NULL, NULL, 0 },
695 /* 0x57 */ { NULL, NULL, 0 },
696 /* 0x58 */ { NULL, NULL, 0 },
697 /* 0x59 */ { NULL, NULL, 0 },
698 /* 0x5a */ { NULL, NULL, 0 },
699 /* 0x5b */ { NULL, NULL, 0 },
700 /* 0x5c */ { NULL, NULL, 0 },
701 /* 0x5d */ { NULL, NULL, 0 },
702 /* 0x5e */ { NULL, NULL, 0 },
703 /* 0x5f */ { NULL, NULL, 0 },
704 /* 0x60 */ { NULL, NULL, 0 },
705 /* 0x61 */ { NULL, NULL, 0 },
706 /* 0x62 */ { NULL, NULL, 0 },
707 /* 0x63 */ { NULL, NULL, 0 },
708 /* 0x64 */ { NULL, NULL, 0 },
709 /* 0x65 */ { NULL, NULL, 0 },
710 /* 0x66 */ { NULL, NULL, 0 },
711 /* 0x67 */ { NULL, NULL, 0 },
712 /* 0x68 */ { NULL, NULL, 0 },
713 /* 0x69 */ { NULL, NULL, 0 },
714 /* 0x6a */ { NULL, NULL, 0 },
715 /* 0x6b */ { NULL, NULL, 0 },
716 /* 0x6c */ { NULL, NULL, 0 },
717 /* 0x6d */ { NULL, NULL, 0 },
718 /* 0x6e */ { NULL, NULL, 0 },
719 /* 0x6f */ { NULL, NULL, 0 },
720 /* 0x70 */ { "SMBtcon",reply_tcon,0},
721 /* 0x71 */ { "SMBtdis",reply_tdis,DO_CHDIR},
722 /* 0x72 */ { "SMBnegprot",reply_negprot,0},
723 /* 0x73 */ { "SMBsesssetupX",reply_sesssetup_and_X,0},
724 /* 0x74 */ { "SMBulogoffX", reply_ulogoffX, 0}, /* ulogoff doesn't give a valid TID */
725 /* 0x75 */ { "SMBtconX",reply_tcon_and_X,0},
726 /* 0x76 */ { NULL, NULL, 0 },
727 /* 0x77 */ { NULL, NULL, 0 },
728 /* 0x78 */ { NULL, NULL, 0 },
729 /* 0x79 */ { NULL, NULL, 0 },
730 /* 0x7a */ { NULL, NULL, 0 },
731 /* 0x7b */ { NULL, NULL, 0 },
732 /* 0x7c */ { NULL, NULL, 0 },
733 /* 0x7d */ { NULL, NULL, 0 },
734 /* 0x7e */ { NULL, NULL, 0 },
735 /* 0x7f */ { NULL, NULL, 0 },
736 /* 0x80 */ { "SMBdskattr",reply_dskattr,AS_USER},
737 /* 0x81 */ { "SMBsearch",reply_search,AS_USER},
738 /* 0x82 */ { "SMBffirst",reply_search,AS_USER},
739 /* 0x83 */ { "SMBfunique",reply_search,AS_USER},
740 /* 0x84 */ { "SMBfclose",reply_fclose,AS_USER},
741 /* 0x85 */ { NULL, NULL, 0 },
742 /* 0x86 */ { NULL, NULL, 0 },
743 /* 0x87 */ { NULL, NULL, 0 },
744 /* 0x88 */ { NULL, NULL, 0 },
745 /* 0x89 */ { NULL, NULL, 0 },
746 /* 0x8a */ { NULL, NULL, 0 },
747 /* 0x8b */ { NULL, NULL, 0 },
748 /* 0x8c */ { NULL, NULL, 0 },
749 /* 0x8d */ { NULL, NULL, 0 },
750 /* 0x8e */ { NULL, NULL, 0 },
751 /* 0x8f */ { NULL, NULL, 0 },
752 /* 0x90 */ { NULL, NULL, 0 },
753 /* 0x91 */ { NULL, NULL, 0 },
754 /* 0x92 */ { NULL, NULL, 0 },
755 /* 0x93 */ { NULL, NULL, 0 },
756 /* 0x94 */ { NULL, NULL, 0 },
757 /* 0x95 */ { NULL, NULL, 0 },
758 /* 0x96 */ { NULL, NULL, 0 },
759 /* 0x97 */ { NULL, NULL, 0 },
760 /* 0x98 */ { NULL, NULL, 0 },
761 /* 0x99 */ { NULL, NULL, 0 },
762 /* 0x9a */ { NULL, NULL, 0 },
763 /* 0x9b */ { NULL, NULL, 0 },
764 /* 0x9c */ { NULL, NULL, 0 },
765 /* 0x9d */ { NULL, NULL, 0 },
766 /* 0x9e */ { NULL, NULL, 0 },
767 /* 0x9f */ { NULL, NULL, 0 },
768 /* 0xa0 */ { "SMBnttrans", reply_nttrans, AS_USER | CAN_IPC },
769 /* 0xa1 */ { "SMBnttranss", reply_nttranss, AS_USER | CAN_IPC },
770 /* 0xa2 */ { "SMBntcreateX", reply_ntcreate_and_X, AS_USER | CAN_IPC },
771 /* 0xa3 */ { NULL, NULL, 0 },
772 /* 0xa4 */ { "SMBntcancel", reply_ntcancel, 0 },
773 /* 0xa5 */ { "SMBntrename", reply_ntrename, AS_USER | NEED_WRITE },
774 /* 0xa6 */ { NULL, NULL, 0 },
775 /* 0xa7 */ { NULL, NULL, 0 },
776 /* 0xa8 */ { NULL, NULL, 0 },
777 /* 0xa9 */ { NULL, NULL, 0 },
778 /* 0xaa */ { NULL, NULL, 0 },
779 /* 0xab */ { NULL, NULL, 0 },
780 /* 0xac */ { NULL, NULL, 0 },
781 /* 0xad */ { NULL, NULL, 0 },
782 /* 0xae */ { NULL, NULL, 0 },
783 /* 0xaf */ { NULL, NULL, 0 },
784 /* 0xb0 */ { NULL, NULL, 0 },
785 /* 0xb1 */ { NULL, NULL, 0 },
786 /* 0xb2 */ { NULL, NULL, 0 },
787 /* 0xb3 */ { NULL, NULL, 0 },
788 /* 0xb4 */ { NULL, NULL, 0 },
789 /* 0xb5 */ { NULL, NULL, 0 },
790 /* 0xb6 */ { NULL, NULL, 0 },
791 /* 0xb7 */ { NULL, NULL, 0 },
792 /* 0xb8 */ { NULL, NULL, 0 },
793 /* 0xb9 */ { NULL, NULL, 0 },
794 /* 0xba */ { NULL, NULL, 0 },
795 /* 0xbb */ { NULL, NULL, 0 },
796 /* 0xbc */ { NULL, NULL, 0 },
797 /* 0xbd */ { NULL, NULL, 0 },
798 /* 0xbe */ { NULL, NULL, 0 },
799 /* 0xbf */ { NULL, NULL, 0 },
800 /* 0xc0 */ { "SMBsplopen",reply_printopen,AS_USER},
801 /* 0xc1 */ { "SMBsplwr",reply_printwrite,AS_USER},
802 /* 0xc2 */ { "SMBsplclose",reply_printclose,AS_USER},
803 /* 0xc3 */ { "SMBsplretq",reply_printqueue,AS_USER},
804 /* 0xc4 */ { NULL, NULL, 0 },
805 /* 0xc5 */ { NULL, NULL, 0 },
806 /* 0xc6 */ { NULL, NULL, 0 },
807 /* 0xc7 */ { NULL, NULL, 0 },
808 /* 0xc8 */ { NULL, NULL, 0 },
809 /* 0xc9 */ { NULL, NULL, 0 },
810 /* 0xca */ { NULL, NULL, 0 },
811 /* 0xcb */ { NULL, NULL, 0 },
812 /* 0xcc */ { NULL, NULL, 0 },
813 /* 0xcd */ { NULL, NULL, 0 },
814 /* 0xce */ { NULL, NULL, 0 },
815 /* 0xcf */ { NULL, NULL, 0 },
816 /* 0xd0 */ { "SMBsends",reply_sends,AS_GUEST},
817 /* 0xd1 */ { "SMBsendb",NULL,AS_GUEST},
818 /* 0xd2 */ { "SMBfwdname",NULL,AS_GUEST},
819 /* 0xd3 */ { "SMBcancelf",NULL,AS_GUEST},
820 /* 0xd4 */ { "SMBgetmac",NULL,AS_GUEST},
821 /* 0xd5 */ { "SMBsendstrt",reply_sendstrt,AS_GUEST},
822 /* 0xd6 */ { "SMBsendend",reply_sendend,AS_GUEST},
823 /* 0xd7 */ { "SMBsendtxt",reply_sendtxt,AS_GUEST},
824 /* 0xd8 */ { NULL, NULL, 0 },
825 /* 0xd9 */ { NULL, NULL, 0 },
826 /* 0xda */ { NULL, NULL, 0 },
827 /* 0xdb */ { NULL, NULL, 0 },
828 /* 0xdc */ { NULL, NULL, 0 },
829 /* 0xdd */ { NULL, NULL, 0 },
830 /* 0xde */ { NULL, NULL, 0 },
831 /* 0xdf */ { NULL, NULL, 0 },
832 /* 0xe0 */ { NULL, NULL, 0 },
833 /* 0xe1 */ { NULL, NULL, 0 },
834 /* 0xe2 */ { NULL, NULL, 0 },
835 /* 0xe3 */ { NULL, NULL, 0 },
836 /* 0xe4 */ { NULL, NULL, 0 },
837 /* 0xe5 */ { NULL, NULL, 0 },
838 /* 0xe6 */ { NULL, NULL, 0 },
839 /* 0xe7 */ { NULL, NULL, 0 },
840 /* 0xe8 */ { NULL, NULL, 0 },
841 /* 0xe9 */ { NULL, NULL, 0 },
842 /* 0xea */ { NULL, NULL, 0 },
843 /* 0xeb */ { NULL, NULL, 0 },
844 /* 0xec */ { NULL, NULL, 0 },
845 /* 0xed */ { NULL, NULL, 0 },
846 /* 0xee */ { NULL, NULL, 0 },
847 /* 0xef */ { NULL, NULL, 0 },
848 /* 0xf0 */ { NULL, NULL, 0 },
849 /* 0xf1 */ { NULL, NULL, 0 },
850 /* 0xf2 */ { NULL, NULL, 0 },
851 /* 0xf3 */ { NULL, NULL, 0 },
852 /* 0xf4 */ { NULL, NULL, 0 },
853 /* 0xf5 */ { NULL, NULL, 0 },
854 /* 0xf6 */ { NULL, NULL, 0 },
855 /* 0xf7 */ { NULL, NULL, 0 },
856 /* 0xf8 */ { NULL, NULL, 0 },
857 /* 0xf9 */ { NULL, NULL, 0 },
858 /* 0xfa */ { NULL, NULL, 0 },
859 /* 0xfb */ { NULL, NULL, 0 },
860 /* 0xfc */ { NULL, NULL, 0 },
861 /* 0xfd */ { NULL, NULL, 0 },
862 /* 0xfe */ { NULL, NULL, 0 },
863 /* 0xff */ { NULL, NULL, 0 }
867 /*******************************************************************
868 Dump a packet to a file.
869 ********************************************************************/
871 static void smb_dump(const char *name, int type, char *data, ssize_t len)
875 if (DEBUGLEVEL < 50) return;
877 if (len < 4) len = smb_len(data)+4;
878 for (i=1;i<100;i++) {
879 slprintf(fname,sizeof(fname)-1, "/tmp/%s.%d.%s", name, i,
880 type ? "req" : "resp");
881 fd = open(fname, O_WRONLY|O_CREAT|O_EXCL, 0644);
882 if (fd != -1 || errno != EEXIST) break;
885 ssize_t ret = write(fd, data, len);
887 DEBUG(0,("smb_dump: problem: write returned %d\n", (int)ret ));
889 DEBUG(0,("created %s len %lu\n", fname, (unsigned long)len));
894 /****************************************************************************
895 Do a switch on the message type, and return the response size
896 ****************************************************************************/
898 static int switch_message(int type,char *inbuf,char *outbuf,int size,int bufsize)
900 static pid_t pid= (pid_t)-1;
905 if (pid == (pid_t)-1)
912 /* Make sure this is an SMB packet. smb_size contains NetBIOS header so subtract 4 from it. */
913 if ((strncmp(smb_base(inbuf),"\377SMB",4) != 0) || (size < (smb_size - 4))) {
914 DEBUG(2,("Non-SMB packet of length %d. Terminating server\n",smb_len(inbuf)));
915 exit_server_cleanly("Non-SMB packet");
919 /* yuck! this is an interim measure before we get rid of our
920 current inbuf/outbuf system */
921 global_smbpid = SVAL(inbuf,smb_pid);
923 if (smb_messages[type].fn == NULL) {
924 DEBUG(0,("Unknown message type %d!\n",type));
925 smb_dump("Unknown", 1, inbuf, size);
926 outsize = reply_unknown(inbuf,outbuf);
928 int flags = smb_messages[type].flags;
929 static uint16 last_session_tag = UID_FIELD_INVALID;
930 /* In share mode security we must ignore the vuid. */
931 uint16 session_tag = (lp_security() == SEC_SHARE) ? UID_FIELD_INVALID : SVAL(inbuf,smb_uid);
932 connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
934 DEBUG(3,("switch message %s (pid %d) conn 0x%lx\n",smb_fn_name(type),(int)pid,(unsigned long)conn));
936 smb_dump(smb_fn_name(type), 1, inbuf, size);
938 /* Ensure this value is replaced in the incoming packet. */
939 SSVAL(inbuf,smb_uid,session_tag);
942 * Ensure the correct username is in current_user_info.
943 * This is a really ugly bugfix for problems with
944 * multiple session_setup_and_X's being done and
945 * allowing %U and %G substitutions to work correctly.
946 * There is a reason this code is done here, don't
947 * move it unless you know what you're doing... :-).
951 if (session_tag != last_session_tag) {
952 user_struct *vuser = NULL;
954 last_session_tag = session_tag;
955 if(session_tag != UID_FIELD_INVALID) {
956 vuser = get_valid_user_struct(session_tag);
958 set_current_user_info(&vuser->user);
963 /* Does this call need to be run as the connected user? */
964 if (flags & AS_USER) {
966 /* Does this call need a valid tree connection? */
968 /* Amazingly, the error code depends on the command (from Samba4). */
969 if (type == SMBntcreateX) {
970 return ERROR_NT(NT_STATUS_INVALID_HANDLE);
972 return ERROR_DOS(ERRSRV, ERRinvnid);
976 if (!change_to_user(conn,session_tag)) {
977 return(ERROR_NT(NT_STATUS_DOS(ERRSRV,ERRbaduid)));
980 /* All NEED_WRITE and CAN_IPC flags must also have AS_USER. */
982 /* Does it need write permission? */
983 if ((flags & NEED_WRITE) && !CAN_WRITE(conn)) {
984 return ERROR_NT(NT_STATUS_MEDIA_WRITE_PROTECTED);
987 /* IPC services are limited */
988 if (IS_IPC(conn) && !(flags & CAN_IPC)) {
989 return(ERROR_DOS(ERRSRV,ERRaccess));
992 /* This call needs to be run as root */
993 change_to_root_user();
996 /* load service specific parameters */
998 if (!set_current_service(conn,SVAL(inbuf,smb_flg),(flags & (AS_USER|DO_CHDIR)?True:False))) {
999 return(ERROR_DOS(ERRSRV,ERRaccess));
1001 conn->num_smb_operations++;
1004 /* does this protocol need to be run as guest? */
1005 if ((flags & AS_GUEST) && (!change_to_guest() ||
1006 !check_access(smbd_server_fd(), lp_hostsallow(-1), lp_hostsdeny(-1)))) {
1007 return(ERROR_DOS(ERRSRV,ERRaccess));
1010 current_inbuf = inbuf; /* In case we need to defer this message in open... */
1011 outsize = smb_messages[type].fn(conn, inbuf,outbuf,size,bufsize);
1014 smb_dump(smb_fn_name(type), 0, outbuf, outsize);
1019 /****************************************************************************
1020 Construct a reply to the incoming packet.
1021 ****************************************************************************/
1023 static int construct_reply(char *inbuf,char *outbuf,int size,int bufsize)
1025 int type = CVAL(inbuf,smb_com);
1027 int msg_type = CVAL(inbuf,0);
1034 return(reply_special(inbuf,outbuf));
1036 construct_reply_common(inbuf, outbuf);
1038 outsize = switch_message(type,inbuf,outbuf,size,bufsize);
1040 outsize += chain_size;
1043 smb_setlen(inbuf,outbuf,outsize - 4);
1048 /****************************************************************************
1049 Process an smb from the client
1050 ****************************************************************************/
1052 static void process_smb(char *inbuf, char *outbuf)
1054 static int trans_num;
1055 int msg_type = CVAL(inbuf,0);
1056 int32 len = smb_len(inbuf);
1057 int nread = len + 4;
1059 DO_PROFILE_INC(smb_count);
1061 if (trans_num == 0) {
1062 /* on the first packet, check the global hosts allow/ hosts
1063 deny parameters before doing any parsing of the packet
1064 passed to us by the client. This prevents attacks on our
1065 parsing code from hosts not in the hosts allow list */
1066 if (!check_access(smbd_server_fd(), lp_hostsallow(-1),
1067 lp_hostsdeny(-1))) {
1068 /* send a negative session response "not listening on calling name" */
1069 static unsigned char buf[5] = {0x83, 0, 0, 1, 0x81};
1070 DEBUG( 1, ( "Connection denied from %s\n", client_addr() ) );
1071 (void)send_smb(smbd_server_fd(),(char *)buf);
1072 exit_server_cleanly("connection denied");
1076 DEBUG( 6, ( "got message type 0x%x of len 0x%x\n", msg_type, len ) );
1077 DEBUG( 3, ( "Transaction %d of length %d\n", trans_num, nread ) );
1081 else if(msg_type == SMBkeepalive)
1082 return; /* Keepalive packet. */
1084 nread = construct_reply(inbuf,outbuf,nread,max_send);
1087 if (CVAL(outbuf,0) == 0)
1090 if (nread != smb_len(outbuf) + 4) {
1091 DEBUG(0,("ERROR: Invalid message response size! %d %d\n",
1092 nread, smb_len(outbuf)));
1093 } else if (!send_smb(smbd_server_fd(),outbuf)) {
1094 exit_server_cleanly("process_smb: send_smb failed.");
1100 /****************************************************************************
1101 Return a string containing the function name of a SMB command.
1102 ****************************************************************************/
1104 const char *smb_fn_name(int type)
1106 const char *unknown_name = "SMBunknown";
1108 if (smb_messages[type].name == NULL)
1109 return(unknown_name);
1111 return(smb_messages[type].name);
1114 /****************************************************************************
1115 Helper functions for contruct_reply.
1116 ****************************************************************************/
1118 static uint32 common_flags2 = FLAGS2_LONG_PATH_COMPONENTS|FLAGS2_32_BIT_ERROR_CODES;
1120 void add_to_common_flags2(uint32 v)
1125 void remove_from_common_flags2(uint32 v)
1127 common_flags2 &= ~v;
1130 void construct_reply_common(const char *inbuf, char *outbuf)
1132 set_message(inbuf,outbuf,0,0,False);
1134 SCVAL(outbuf,smb_com,CVAL(inbuf,smb_com));
1135 SIVAL(outbuf,smb_rcls,0);
1136 SCVAL(outbuf,smb_flg, FLAG_REPLY | (CVAL(inbuf,smb_flg) & FLAG_CASELESS_PATHNAMES));
1137 SSVAL(outbuf,smb_flg2,
1138 (SVAL(inbuf,smb_flg2) & FLAGS2_UNICODE_STRINGS) |
1140 memset(outbuf+smb_pidhigh,'\0',(smb_tid-smb_pidhigh));
1142 SSVAL(outbuf,smb_tid,SVAL(inbuf,smb_tid));
1143 SSVAL(outbuf,smb_pid,SVAL(inbuf,smb_pid));
1144 SSVAL(outbuf,smb_uid,SVAL(inbuf,smb_uid));
1145 SSVAL(outbuf,smb_mid,SVAL(inbuf,smb_mid));
1148 /****************************************************************************
1149 Construct a chained reply and add it to the already made reply
1150 ****************************************************************************/
1152 int chain_reply(char *inbuf,char *outbuf,int size,int bufsize)
1154 static char *orig_inbuf;
1155 static char *orig_outbuf;
1156 int smb_com1, smb_com2 = CVAL(inbuf,smb_vwv0);
1157 unsigned smb_off2 = SVAL(inbuf,smb_vwv1);
1158 char *inbuf2, *outbuf2;
1161 char inbuf_saved[smb_wct];
1162 char outbuf_saved[smb_wct];
1163 int outsize = smb_len(outbuf) + 4;
1165 /* Maybe its not chained, or it's an error packet. */
1166 if (smb_com2 == 0xFF || SVAL(outbuf,smb_rcls) != 0) {
1167 SCVAL(outbuf,smb_vwv0,0xFF);
1171 if (chain_size == 0) {
1172 /* this is the first part of the chain */
1174 orig_outbuf = outbuf;
1178 * The original Win95 redirector dies on a reply to
1179 * a lockingX and read chain unless the chain reply is
1180 * 4 byte aligned. JRA.
1183 outsize = (outsize + 3) & ~3;
1185 /* we need to tell the client where the next part of the reply will be */
1186 SSVAL(outbuf,smb_vwv1,smb_offset(outbuf+outsize,outbuf));
1187 SCVAL(outbuf,smb_vwv0,smb_com2);
1189 /* remember how much the caller added to the chain, only counting stuff
1190 after the parameter words */
1191 chain_size += outsize - smb_wct;
1193 /* work out pointers into the original packets. The
1194 headers on these need to be filled in */
1195 inbuf2 = orig_inbuf + smb_off2 + 4 - smb_wct;
1196 outbuf2 = orig_outbuf + SVAL(outbuf,smb_vwv1) + 4 - smb_wct;
1198 /* remember the original command type */
1199 smb_com1 = CVAL(orig_inbuf,smb_com);
1201 /* save the data which will be overwritten by the new headers */
1202 memcpy(inbuf_saved,inbuf2,smb_wct);
1203 memcpy(outbuf_saved,outbuf2,smb_wct);
1205 /* give the new packet the same header as the last part of the SMB */
1206 memmove(inbuf2,inbuf,smb_wct);
1208 /* create the in buffer */
1209 SCVAL(inbuf2,smb_com,smb_com2);
1211 /* work out the new size for the in buffer. */
1212 new_size = size - (inbuf2 - inbuf);
1214 DEBUG(0,("chain_reply: chain packet size incorrect "
1215 "(orig size = %d, offset = %d)\n",
1216 size, (int)(inbuf2 - inbuf) ));
1217 exit_server_cleanly("Bad chained packet");
1221 /* And set it in the header. */
1222 smb_setlen(inbuf, inbuf2, new_size);
1224 /* create the out buffer */
1225 construct_reply_common(inbuf2, outbuf2);
1227 DEBUG(3,("Chained message\n"));
1230 /* process the request */
1231 outsize2 = switch_message(smb_com2,inbuf2,outbuf2,new_size,
1232 bufsize-chain_size);
1234 /* copy the new reply and request headers over the old ones, but
1235 preserve the smb_com field */
1236 memmove(orig_outbuf,outbuf2,smb_wct);
1237 SCVAL(orig_outbuf,smb_com,smb_com1);
1239 /* restore the saved data, being careful not to overwrite any
1240 data from the reply header */
1241 memcpy(inbuf2,inbuf_saved,smb_wct);
1244 int ofs = smb_wct - PTR_DIFF(outbuf2,orig_outbuf);
1248 memmove(outbuf2+ofs,outbuf_saved+ofs,smb_wct-ofs);
1254 /****************************************************************************
1255 Setup the needed select timeout in milliseconds.
1256 ****************************************************************************/
1258 static int setup_select_timeout(void)
1262 select_timeout = SMBD_SELECT_TIMEOUT*1000;
1264 if (print_notify_messages_pending()) {
1265 select_timeout = MIN(select_timeout, 1000);
1268 return select_timeout;
1271 /****************************************************************************
1272 Check if services need reloading.
1273 ****************************************************************************/
1275 void check_reload(time_t t)
1277 static pid_t mypid = 0;
1278 static time_t last_smb_conf_reload_time = 0;
1279 static time_t last_printer_reload_time = 0;
1280 time_t printcap_cache_time = (time_t)lp_printcap_cache_time();
1282 if(last_smb_conf_reload_time == 0) {
1283 last_smb_conf_reload_time = t;
1284 /* Our printing subsystem might not be ready at smbd start up.
1285 Then no printer is available till the first printers check
1286 is performed. A lower initial interval circumvents this. */
1287 if ( printcap_cache_time > 60 )
1288 last_printer_reload_time = t - printcap_cache_time + 60;
1290 last_printer_reload_time = t;
1293 if (mypid != getpid()) { /* First time or fork happened meanwhile */
1294 /* randomize over 60 second the printcap reload to avoid all
1295 * process hitting cupsd at the same time */
1296 int time_range = 60;
1298 last_printer_reload_time += random() % time_range;
1302 if (reload_after_sighup || (t >= last_smb_conf_reload_time+SMBD_RELOAD_CHECK)) {
1303 reload_services(True);
1304 reload_after_sighup = False;
1305 last_smb_conf_reload_time = t;
1308 /* 'printcap cache time = 0' disable the feature */
1310 if ( printcap_cache_time != 0 )
1312 /* see if it's time to reload or if the clock has been set back */
1314 if ( (t >= last_printer_reload_time+printcap_cache_time)
1315 || (t-last_printer_reload_time < 0) )
1317 DEBUG( 3,( "Printcap cache time expired.\n"));
1319 last_printer_reload_time = t;
1324 /****************************************************************************
1325 Process any timeout housekeeping. Return False if the caller should exit.
1326 ****************************************************************************/
1328 static BOOL timeout_processing(int *select_timeout,
1329 time_t *last_timeout_processing_time)
1333 if (smb_read_error == READ_EOF) {
1334 DEBUG(3,("timeout_processing: End of file from client (client has disconnected).\n"));
1338 if (smb_read_error == READ_ERROR) {
1339 DEBUG(3,("timeout_processing: receive_smb error (%s) Exiting\n",
1344 if (smb_read_error == READ_BAD_SIG) {
1345 DEBUG(3,("timeout_processing: receive_smb error bad smb signature. Exiting\n"));
1349 *last_timeout_processing_time = t = time(NULL);
1351 /* become root again if waiting */
1352 change_to_root_user();
1354 /* check if we need to reload services */
1357 if(global_machine_password_needs_changing &&
1358 /* for ADS we need to do a regular ADS password change, not a domain
1360 lp_security() == SEC_DOMAIN) {
1362 unsigned char trust_passwd_hash[16];
1366 * We're in domain level security, and the code that
1367 * read the machine password flagged that the machine
1368 * password needs changing.
1372 * First, open the machine password file with an exclusive lock.
1375 if (secrets_lock_trust_account_password(lp_workgroup(), True) == False) {
1376 DEBUG(0,("process: unable to lock the machine account password for \
1377 machine %s in domain %s.\n", global_myname(), lp_workgroup() ));
1381 if(!secrets_fetch_trust_account_password(lp_workgroup(), trust_passwd_hash, &lct, NULL)) {
1382 DEBUG(0,("process: unable to read the machine account password for \
1383 machine %s in domain %s.\n", global_myname(), lp_workgroup()));
1384 secrets_lock_trust_account_password(lp_workgroup(), False);
1389 * Make sure someone else hasn't already done this.
1392 if(t < lct + lp_machine_password_timeout()) {
1393 global_machine_password_needs_changing = False;
1394 secrets_lock_trust_account_password(lp_workgroup(), False);
1398 /* always just contact the PDC here */
1400 change_trust_account_password( lp_workgroup(), NULL);
1401 global_machine_password_needs_changing = False;
1402 secrets_lock_trust_account_password(lp_workgroup(), False);
1405 /* update printer queue caches if necessary */
1407 update_monitored_printq_cache();
1410 * Now we are root, check if the log files need pruning.
1411 * Force a log file check.
1413 force_check_log_size();
1416 /* Send any queued printer notify message to interested smbd's. */
1418 print_notify_send_messages(smbd_messaging_context(), 0);
1421 * Modify the select timeout depending upon
1422 * what we have remaining in our queues.
1425 *select_timeout = setup_select_timeout();
1430 /****************************************************************************
1431 Accessor functions for InBuffer, OutBuffer.
1432 ****************************************************************************/
1434 char *get_InBuffer(void)
1439 char *get_OutBuffer(void)
1444 const int total_buffer_size = (BUFFER_SIZE + LARGE_WRITEX_HDR_SIZE + SAFETY_MARGIN);
1446 /****************************************************************************
1447 Allocate a new InBuffer. Returns the new and old ones.
1448 ****************************************************************************/
1450 static char *NewInBuffer(char **old_inbuf)
1452 char *new_inbuf = (char *)SMB_MALLOC(total_buffer_size);
1457 *old_inbuf = InBuffer;
1459 InBuffer = new_inbuf;
1460 #if defined(DEVELOPER)
1461 clobber_region(SAFE_STRING_FUNCTION_NAME, SAFE_STRING_LINE, InBuffer, total_buffer_size);
1466 /****************************************************************************
1467 Allocate a new OutBuffer. Returns the new and old ones.
1468 ****************************************************************************/
1470 static char *NewOutBuffer(char **old_outbuf)
1472 char *new_outbuf = (char *)SMB_MALLOC(total_buffer_size);
1477 *old_outbuf = OutBuffer;
1479 OutBuffer = new_outbuf;
1480 #if defined(DEVELOPER)
1481 clobber_region(SAFE_STRING_FUNCTION_NAME, SAFE_STRING_LINE, OutBuffer, total_buffer_size);
1486 /****************************************************************************
1487 Process commands from the client
1488 ****************************************************************************/
1490 void smbd_process(void)
1492 time_t last_timeout_processing_time = time(NULL);
1493 unsigned int num_smbs = 0;
1495 /* Allocate the primary Inbut/Output buffers. */
1497 if ((NewInBuffer(NULL) == NULL) || (NewOutBuffer(NULL) == NULL))
1500 max_recv = MIN(lp_maxxmit(),BUFFER_SIZE);
1503 int select_timeout = setup_select_timeout();
1508 /* free up temporary memory */
1510 main_loop_TALLOC_FREE();
1512 /* Did someone ask for immediate checks on things like blocking locks ? */
1513 if (select_timeout == 0) {
1514 if(!timeout_processing(&select_timeout,
1515 &last_timeout_processing_time))
1517 num_smbs = 0; /* Reset smb counter. */
1520 run_events(smbd_event_context(), 0, NULL, NULL);
1522 #if defined(DEVELOPER)
1523 clobber_region(SAFE_STRING_FUNCTION_NAME, SAFE_STRING_LINE, InBuffer, total_buffer_size);
1526 while (!receive_message_or_smb(InBuffer,BUFFER_SIZE+LARGE_WRITEX_HDR_SIZE,select_timeout)) {
1527 if(!timeout_processing(&select_timeout,
1528 &last_timeout_processing_time))
1530 num_smbs = 0; /* Reset smb counter. */
1534 * Ensure we do timeout processing if the SMB we just got was
1535 * only an echo request. This allows us to set the select
1536 * timeout in 'receive_message_or_smb()' to any value we like
1537 * without worrying that the client will send echo requests
1538 * faster than the select timeout, thus starving out the
1539 * essential processing (change notify, blocking locks) that
1540 * the timeout code does. JRA.
1542 num_echos = smb_echo_count;
1544 clobber_region(SAFE_STRING_FUNCTION_NAME, SAFE_STRING_LINE, OutBuffer, total_buffer_size);
1546 process_smb(InBuffer, OutBuffer);
1548 if (smb_echo_count != num_echos) {
1549 if(!timeout_processing( &select_timeout, &last_timeout_processing_time))
1551 num_smbs = 0; /* Reset smb counter. */
1557 * If we are getting smb requests in a constant stream
1558 * with no echos, make sure we attempt timeout processing
1559 * every select_timeout milliseconds - but only check for this
1560 * every 200 smb requests.
1563 if ((num_smbs % 200) == 0) {
1564 time_t new_check_time = time(NULL);
1565 if(new_check_time - last_timeout_processing_time >= (select_timeout/1000)) {
1566 if(!timeout_processing(
1568 &last_timeout_processing_time))
1570 num_smbs = 0; /* Reset smb counter. */
1571 last_timeout_processing_time = new_check_time; /* Reset time. */
1575 /* The timeout_processing function isn't run nearly
1576 often enough to implement 'max log size' without
1577 overrunning the size of the file by many megabytes.
1578 This is especially true if we are running at debug
1579 level 10. Checking every 50 SMBs is a nice
1580 tradeoff of performance vs log file size overrun. */
1582 if ((num_smbs % 50) == 0 && need_to_check_log_size()) {
1583 change_to_root_user();