2 Unix SMB/CIFS implementation.
3 process incoming packets - main loop
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Volker Lendecke 2005
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 extern struct auth_context *negprot_global_auth_context;
27 extern int smb_echo_count;
29 static char *InBuffer = NULL;
30 static char *OutBuffer = NULL;
31 static char *current_inbuf = NULL;
34 * Size of data we can send to client. Set
35 * by the client for all protocols above CORE.
36 * Set by us for CORE protocol.
38 int max_send = BUFFER_SIZE;
40 * Size of the data we can receive. Set by us.
41 * Can be modified by the max xmit parameter.
43 int max_recv = BUFFER_SIZE;
45 extern int last_message;
46 extern int smb_read_error;
47 SIG_ATOMIC_T reload_after_sighup = 0;
48 SIG_ATOMIC_T got_sig_term = 0;
49 extern BOOL global_machine_password_needs_changing;
52 /****************************************************************************
53 Function to return the current request mid from Inbuffer.
54 ****************************************************************************/
56 uint16 get_current_mid(void)
58 return SVAL(InBuffer,smb_mid);
61 /****************************************************************************
62 structure to hold a linked list of queued messages.
64 ****************************************************************************/
66 static struct pending_message_list *deferred_open_queue;
68 /****************************************************************************
69 Function to push a message onto the tail of a linked list of smb messages ready
71 ****************************************************************************/
73 static BOOL push_queued_message(char *buf, int msg_len,
74 struct timeval request_time,
75 struct timeval end_time,
76 char *private_data, size_t private_len)
78 struct pending_message_list *tmp_msg;
79 struct pending_message_list *msg;
81 msg = TALLOC_ZERO_P(NULL, struct pending_message_list);
84 DEBUG(0,("push_message: malloc fail (1)\n"));
88 msg->buf = data_blob_talloc(msg, buf, msg_len);
89 if(msg->buf.data == NULL) {
90 DEBUG(0,("push_message: malloc fail (2)\n"));
95 msg->request_time = request_time;
96 msg->end_time = end_time;
99 msg->private_data = data_blob_talloc(msg, private_data,
101 if (msg->private_data.data == NULL) {
102 DEBUG(0,("push_message: malloc fail (3)\n"));
108 DLIST_ADD_END(deferred_open_queue, msg, tmp_msg);
110 DEBUG(10,("push_message: pushed message length %u on "
111 "deferred_open_queue\n", (unsigned int)msg_len));
116 /****************************************************************************
117 Function to delete a sharing violation open message by mid.
118 ****************************************************************************/
120 void remove_deferred_open_smb_message(uint16 mid)
122 struct pending_message_list *pml;
124 for (pml = deferred_open_queue; pml; pml = pml->next) {
125 if (mid == SVAL(pml->buf.data,smb_mid)) {
126 DEBUG(10,("remove_sharing_violation_open_smb_message: "
127 "deleting mid %u len %u\n",
129 (unsigned int)pml->buf.length ));
130 DLIST_REMOVE(deferred_open_queue, pml);
137 /****************************************************************************
138 Move a sharing violation open retry message to the front of the list and
139 schedule it for immediate processing.
140 ****************************************************************************/
142 void schedule_deferred_open_smb_message(uint16 mid)
144 struct pending_message_list *pml;
147 for (pml = deferred_open_queue; pml; pml = pml->next) {
148 uint16 msg_mid = SVAL(pml->buf.data,smb_mid);
149 DEBUG(10,("schedule_deferred_open_smb_message: [%d] msg_mid = %u\n", i++,
150 (unsigned int)msg_mid ));
151 if (mid == msg_mid) {
152 DEBUG(10,("schedule_deferred_open_smb_message: scheduling mid %u\n",
154 pml->end_time.tv_sec = 0;
155 pml->end_time.tv_usec = 0;
156 DLIST_PROMOTE(deferred_open_queue, pml);
161 DEBUG(10,("schedule_deferred_open_smb_message: failed to find message mid %u\n",
165 /****************************************************************************
166 Return true if this mid is on the deferred queue.
167 ****************************************************************************/
169 BOOL open_was_deferred(uint16 mid)
171 struct pending_message_list *pml;
173 for (pml = deferred_open_queue; pml; pml = pml->next) {
174 if (SVAL(pml->buf.data,smb_mid) == mid) {
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)
899 /* Make sure this is an SMB packet. smb_size contains NetBIOS header so subtract 4 from it. */
900 if ((strncmp(smb_base(inbuf),"\377SMB",4) != 0) || (size < (smb_size - 4))) {
901 DEBUG(2,("Non-SMB packet of length %d. Terminating server\n",smb_len(inbuf)));
902 exit_server_cleanly("Non-SMB packet");
906 /* yuck! this is an interim measure before we get rid of our
907 current inbuf/outbuf system */
908 global_smbpid = SVAL(inbuf,smb_pid);
910 if (smb_messages[type].fn == NULL) {
911 DEBUG(0,("Unknown message type %d!\n",type));
912 smb_dump("Unknown", 1, inbuf, size);
913 outsize = reply_unknown(inbuf,outbuf);
915 int flags = smb_messages[type].flags;
916 static uint16 last_session_tag = UID_FIELD_INVALID;
917 /* In share mode security we must ignore the vuid. */
918 uint16 session_tag = (lp_security() == SEC_SHARE) ? UID_FIELD_INVALID : SVAL(inbuf,smb_uid);
919 connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
921 DEBUG(3,("switch message %s (pid %d) conn 0x%lx\n",smb_fn_name(type),(int)pid,(unsigned long)conn));
923 smb_dump(smb_fn_name(type), 1, inbuf, size);
925 /* Ensure this value is replaced in the incoming packet. */
926 SSVAL(inbuf,smb_uid,session_tag);
929 * Ensure the correct username is in current_user_info.
930 * This is a really ugly bugfix for problems with
931 * multiple session_setup_and_X's being done and
932 * allowing %U and %G substitutions to work correctly.
933 * There is a reason this code is done here, don't
934 * move it unless you know what you're doing... :-).
938 if (session_tag != last_session_tag) {
939 user_struct *vuser = NULL;
941 last_session_tag = session_tag;
942 if(session_tag != UID_FIELD_INVALID) {
943 vuser = get_valid_user_struct(session_tag);
945 set_current_user_info(&vuser->user);
950 /* Does this call need to be run as the connected user? */
951 if (flags & AS_USER) {
953 /* Does this call need a valid tree connection? */
955 /* Amazingly, the error code depends on the command (from Samba4). */
956 if (type == SMBntcreateX) {
957 return ERROR_NT(NT_STATUS_INVALID_HANDLE);
959 return ERROR_DOS(ERRSRV, ERRinvnid);
963 if (!change_to_user(conn,session_tag)) {
964 return(ERROR_NT(NT_STATUS_DOS(ERRSRV,ERRbaduid)));
967 /* All NEED_WRITE and CAN_IPC flags must also have AS_USER. */
969 /* Does it need write permission? */
970 if ((flags & NEED_WRITE) && !CAN_WRITE(conn)) {
971 return(ERROR_DOS(ERRSRV,ERRaccess));
974 /* IPC services are limited */
975 if (IS_IPC(conn) && !(flags & CAN_IPC)) {
976 return(ERROR_DOS(ERRSRV,ERRaccess));
979 /* This call needs to be run as root */
980 change_to_root_user();
983 /* load service specific parameters */
985 if (!set_current_service(conn,SVAL(inbuf,smb_flg),(flags & (AS_USER|DO_CHDIR)?True:False))) {
986 return(ERROR_DOS(ERRSRV,ERRaccess));
988 conn->num_smb_operations++;
991 /* does this protocol need to be run as guest? */
992 if ((flags & AS_GUEST) && (!change_to_guest() ||
993 !check_access(smbd_server_fd(), lp_hostsallow(-1), lp_hostsdeny(-1)))) {
994 return(ERROR_DOS(ERRSRV,ERRaccess));
997 current_inbuf = inbuf; /* In case we need to defer this message in open... */
998 outsize = smb_messages[type].fn(conn, inbuf,outbuf,size,bufsize);
1001 smb_dump(smb_fn_name(type), 0, outbuf, outsize);
1006 /****************************************************************************
1007 Construct a reply to the incoming packet.
1008 ****************************************************************************/
1010 static int construct_reply(char *inbuf,char *outbuf,int size,int bufsize)
1012 int type = CVAL(inbuf,smb_com);
1014 int msg_type = CVAL(inbuf,0);
1021 return(reply_special(inbuf,outbuf));
1023 construct_reply_common(inbuf, outbuf);
1025 outsize = switch_message(type,inbuf,outbuf,size,bufsize);
1027 outsize += chain_size;
1030 smb_setlen(outbuf,outsize - 4);
1034 /****************************************************************************
1035 Process an smb from the client
1036 ****************************************************************************/
1038 static void process_smb(char *inbuf, char *outbuf)
1040 static int trans_num;
1041 int msg_type = CVAL(inbuf,0);
1042 int32 len = smb_len(inbuf);
1043 int nread = len + 4;
1045 DO_PROFILE_INC(smb_count);
1047 if (trans_num == 0) {
1048 /* on the first packet, check the global hosts allow/ hosts
1049 deny parameters before doing any parsing of the packet
1050 passed to us by the client. This prevents attacks on our
1051 parsing code from hosts not in the hosts allow list */
1052 if (!check_access(smbd_server_fd(), lp_hostsallow(-1),
1053 lp_hostsdeny(-1))) {
1054 /* send a negative session response "not listening on calling name" */
1055 static unsigned char buf[5] = {0x83, 0, 0, 1, 0x81};
1056 DEBUG( 1, ( "Connection denied from %s\n", client_addr() ) );
1057 (void)send_smb(smbd_server_fd(),(char *)buf);
1058 exit_server_cleanly("connection denied");
1062 DEBUG( 6, ( "got message type 0x%x of len 0x%x\n", msg_type, len ) );
1063 DEBUG( 3, ( "Transaction %d of length %d\n", trans_num, nread ) );
1067 else if(msg_type == SMBkeepalive)
1068 return; /* Keepalive packet. */
1070 nread = construct_reply(inbuf,outbuf,nread,max_send);
1073 if (CVAL(outbuf,0) == 0)
1076 if (nread != smb_len(outbuf) + 4) {
1077 DEBUG(0,("ERROR: Invalid message response size! %d %d\n",
1078 nread, smb_len(outbuf)));
1079 } else if (!send_smb(smbd_server_fd(),outbuf)) {
1080 exit_server_cleanly("process_smb: send_smb failed.");
1086 /****************************************************************************
1087 Return a string containing the function name of a SMB command.
1088 ****************************************************************************/
1090 const char *smb_fn_name(int type)
1092 const char *unknown_name = "SMBunknown";
1094 if (smb_messages[type].name == NULL)
1095 return(unknown_name);
1097 return(smb_messages[type].name);
1100 /****************************************************************************
1101 Helper functions for contruct_reply.
1102 ****************************************************************************/
1104 static uint32 common_flags2 = FLAGS2_LONG_PATH_COMPONENTS|FLAGS2_32_BIT_ERROR_CODES;
1106 void add_to_common_flags2(uint32 v)
1111 void remove_from_common_flags2(uint32 v)
1113 common_flags2 &= ~v;
1116 void construct_reply_common(char *inbuf,char *outbuf)
1118 set_message(outbuf,0,0,False);
1120 SCVAL(outbuf,smb_com,CVAL(inbuf,smb_com));
1121 SIVAL(outbuf,smb_rcls,0);
1122 SCVAL(outbuf,smb_flg, FLAG_REPLY | (CVAL(inbuf,smb_flg) & FLAG_CASELESS_PATHNAMES));
1123 SSVAL(outbuf,smb_flg2,
1124 (SVAL(inbuf,smb_flg2) & FLAGS2_UNICODE_STRINGS) |
1126 memset(outbuf+smb_pidhigh,'\0',(smb_tid-smb_pidhigh));
1128 SSVAL(outbuf,smb_tid,SVAL(inbuf,smb_tid));
1129 SSVAL(outbuf,smb_pid,SVAL(inbuf,smb_pid));
1130 SSVAL(outbuf,smb_uid,SVAL(inbuf,smb_uid));
1131 SSVAL(outbuf,smb_mid,SVAL(inbuf,smb_mid));
1134 /****************************************************************************
1135 Construct a chained reply and add it to the already made reply
1136 ****************************************************************************/
1138 int chain_reply(char *inbuf,char *outbuf,int size,int bufsize)
1140 static char *orig_inbuf;
1141 static char *orig_outbuf;
1142 int smb_com1, smb_com2 = CVAL(inbuf,smb_vwv0);
1143 unsigned smb_off2 = SVAL(inbuf,smb_vwv1);
1144 char *inbuf2, *outbuf2;
1146 char inbuf_saved[smb_wct];
1147 char outbuf_saved[smb_wct];
1148 int outsize = smb_len(outbuf) + 4;
1150 /* maybe its not chained */
1151 if (smb_com2 == 0xFF) {
1152 SCVAL(outbuf,smb_vwv0,0xFF);
1156 if (chain_size == 0) {
1157 /* this is the first part of the chain */
1159 orig_outbuf = outbuf;
1163 * The original Win95 redirector dies on a reply to
1164 * a lockingX and read chain unless the chain reply is
1165 * 4 byte aligned. JRA.
1168 outsize = (outsize + 3) & ~3;
1170 /* we need to tell the client where the next part of the reply will be */
1171 SSVAL(outbuf,smb_vwv1,smb_offset(outbuf+outsize,outbuf));
1172 SCVAL(outbuf,smb_vwv0,smb_com2);
1174 /* remember how much the caller added to the chain, only counting stuff
1175 after the parameter words */
1176 chain_size += outsize - smb_wct;
1178 /* work out pointers into the original packets. The
1179 headers on these need to be filled in */
1180 inbuf2 = orig_inbuf + smb_off2 + 4 - smb_wct;
1181 outbuf2 = orig_outbuf + SVAL(outbuf,smb_vwv1) + 4 - smb_wct;
1183 /* remember the original command type */
1184 smb_com1 = CVAL(orig_inbuf,smb_com);
1186 /* save the data which will be overwritten by the new headers */
1187 memcpy(inbuf_saved,inbuf2,smb_wct);
1188 memcpy(outbuf_saved,outbuf2,smb_wct);
1190 /* give the new packet the same header as the last part of the SMB */
1191 memmove(inbuf2,inbuf,smb_wct);
1193 /* create the in buffer */
1194 SCVAL(inbuf2,smb_com,smb_com2);
1196 /* create the out buffer */
1197 construct_reply_common(inbuf2, outbuf2);
1199 DEBUG(3,("Chained message\n"));
1202 /* process the request */
1203 outsize2 = switch_message(smb_com2,inbuf2,outbuf2,size-chain_size,
1204 bufsize-chain_size);
1206 /* copy the new reply and request headers over the old ones, but
1207 preserve the smb_com field */
1208 memmove(orig_outbuf,outbuf2,smb_wct);
1209 SCVAL(orig_outbuf,smb_com,smb_com1);
1211 /* restore the saved data, being careful not to overwrite any
1212 data from the reply header */
1213 memcpy(inbuf2,inbuf_saved,smb_wct);
1216 int ofs = smb_wct - PTR_DIFF(outbuf2,orig_outbuf);
1217 if (ofs < 0) ofs = 0;
1218 memmove(outbuf2+ofs,outbuf_saved+ofs,smb_wct-ofs);
1224 /****************************************************************************
1225 Setup the needed select timeout in milliseconds.
1226 ****************************************************************************/
1228 static int setup_select_timeout(void)
1233 select_timeout = blocking_locks_timeout_ms(SMBD_SELECT_TIMEOUT*1000);
1235 t = change_notify_timeout();
1236 DEBUG(10, ("change_notify_timeout: %d\n", t));
1238 select_timeout = MIN(select_timeout, t*1000);
1241 if (print_notify_messages_pending()) {
1242 select_timeout = MIN(select_timeout, 1000);
1245 return select_timeout;
1248 /****************************************************************************
1249 Check if services need reloading.
1250 ****************************************************************************/
1252 void check_reload(time_t t)
1254 static pid_t mypid = 0;
1255 static time_t last_smb_conf_reload_time = 0;
1256 static time_t last_printer_reload_time = 0;
1257 time_t printcap_cache_time = (time_t)lp_printcap_cache_time();
1259 if(last_smb_conf_reload_time == 0) {
1260 last_smb_conf_reload_time = t;
1261 /* Our printing subsystem might not be ready at smbd start up.
1262 Then no printer is available till the first printers check
1263 is performed. A lower initial interval circumvents this. */
1264 if ( printcap_cache_time > 60 )
1265 last_printer_reload_time = t - printcap_cache_time + 60;
1267 last_printer_reload_time = t;
1270 if (mypid != getpid()) { /* First time or fork happened meanwhile */
1271 /* randomize over 60 second the printcap reload to avoid all
1272 * process hitting cupsd at the same time */
1273 int time_range = 60;
1275 last_printer_reload_time += random() % time_range;
1279 if (reload_after_sighup || (t >= last_smb_conf_reload_time+SMBD_RELOAD_CHECK)) {
1280 reload_services(True);
1281 reload_after_sighup = False;
1282 last_smb_conf_reload_time = t;
1285 /* 'printcap cache time = 0' disable the feature */
1287 if ( printcap_cache_time != 0 )
1289 /* see if it's time to reload or if the clock has been set back */
1291 if ( (t >= last_printer_reload_time+printcap_cache_time)
1292 || (t-last_printer_reload_time < 0) )
1294 DEBUG( 3,( "Printcap cache time expired.\n"));
1296 last_printer_reload_time = t;
1301 /****************************************************************************
1302 Process any timeout housekeeping. Return False if the caller should exit.
1303 ****************************************************************************/
1305 static BOOL timeout_processing(int deadtime, int *select_timeout, time_t *last_timeout_processing_time)
1307 static time_t last_keepalive_sent_time = 0;
1308 static time_t last_idle_closed_check = 0;
1310 BOOL allidle = True;
1312 if (smb_read_error == READ_EOF) {
1313 DEBUG(3,("timeout_processing: End of file from client (client has disconnected).\n"));
1317 if (smb_read_error == READ_ERROR) {
1318 DEBUG(3,("timeout_processing: receive_smb error (%s) Exiting\n",
1323 if (smb_read_error == READ_BAD_SIG) {
1324 DEBUG(3,("timeout_processing: receive_smb error bad smb signature. Exiting\n"));
1328 *last_timeout_processing_time = t = time(NULL);
1330 if(last_keepalive_sent_time == 0)
1331 last_keepalive_sent_time = t;
1333 if(last_idle_closed_check == 0)
1334 last_idle_closed_check = t;
1336 /* become root again if waiting */
1337 change_to_root_user();
1339 /* run all registered idle events */
1340 smb_run_idle_events(t);
1342 /* check if we need to reload services */
1345 /* automatic timeout if all connections are closed */
1346 if (conn_num_open()==0 && (t - last_idle_closed_check) >= IDLE_CLOSED_TIMEOUT) {
1347 DEBUG( 2, ( "Closing idle connection\n" ) );
1350 last_idle_closed_check = t;
1353 if (keepalive && (t - last_keepalive_sent_time)>keepalive) {
1354 if (!send_keepalive(smbd_server_fd())) {
1355 DEBUG( 2, ( "Keepalive failed - exiting.\n" ) );
1359 /* send a keepalive for a password server or the like.
1360 This is attached to the auth_info created in the
1362 if (negprot_global_auth_context && negprot_global_auth_context->challenge_set_method
1363 && negprot_global_auth_context->challenge_set_method->send_keepalive) {
1365 negprot_global_auth_context->challenge_set_method->send_keepalive
1366 (&negprot_global_auth_context->challenge_set_method->private_data);
1369 last_keepalive_sent_time = t;
1372 /* check for connection timeouts */
1373 allidle = conn_idle_all(t, deadtime);
1375 if (allidle && conn_num_open()>0) {
1376 DEBUG(2,("Closing idle connection 2.\n"));
1380 if(global_machine_password_needs_changing &&
1381 /* for ADS we need to do a regular ADS password change, not a domain
1383 lp_security() == SEC_DOMAIN) {
1385 unsigned char trust_passwd_hash[16];
1389 * We're in domain level security, and the code that
1390 * read the machine password flagged that the machine
1391 * password needs changing.
1395 * First, open the machine password file with an exclusive lock.
1398 if (secrets_lock_trust_account_password(lp_workgroup(), True) == False) {
1399 DEBUG(0,("process: unable to lock the machine account password for \
1400 machine %s in domain %s.\n", global_myname(), lp_workgroup() ));
1404 if(!secrets_fetch_trust_account_password(lp_workgroup(), trust_passwd_hash, &lct, NULL)) {
1405 DEBUG(0,("process: unable to read the machine account password for \
1406 machine %s in domain %s.\n", global_myname(), lp_workgroup()));
1407 secrets_lock_trust_account_password(lp_workgroup(), False);
1412 * Make sure someone else hasn't already done this.
1415 if(t < lct + lp_machine_password_timeout()) {
1416 global_machine_password_needs_changing = False;
1417 secrets_lock_trust_account_password(lp_workgroup(), False);
1421 /* always just contact the PDC here */
1423 change_trust_account_password( lp_workgroup(), NULL);
1424 global_machine_password_needs_changing = False;
1425 secrets_lock_trust_account_password(lp_workgroup(), False);
1429 * Check to see if we have any blocking locks
1430 * outstanding on the queue.
1432 process_blocking_lock_queue();
1434 /* update printer queue caches if necessary */
1436 update_monitored_printq_cache();
1439 * Check to see if we have any change notifies
1440 * outstanding on the queue.
1442 process_pending_change_notify_queue(t);
1445 * Now we are root, check if the log files need pruning.
1446 * Force a log file check.
1448 force_check_log_size();
1451 /* Send any queued printer notify message to interested smbd's. */
1453 print_notify_send_messages(0);
1456 * Modify the select timeout depending upon
1457 * what we have remaining in our queues.
1460 *select_timeout = setup_select_timeout();
1465 /****************************************************************************
1466 Accessor functions for InBuffer, OutBuffer.
1467 ****************************************************************************/
1469 char *get_InBuffer(void)
1474 void set_InBuffer(char *new_inbuf)
1476 InBuffer = new_inbuf;
1477 current_inbuf = InBuffer;
1480 char *get_OutBuffer(void)
1485 void set_OutBuffer(char *new_outbuf)
1487 OutBuffer = new_outbuf;
1490 /****************************************************************************
1491 Free an InBuffer. Checks if not in use by aio system.
1492 Must have been allocated by NewInBuffer.
1493 ****************************************************************************/
1495 void free_InBuffer(char *inbuf)
1497 if (!aio_inbuffer_in_use(inbuf)) {
1498 if (current_inbuf == inbuf) {
1499 current_inbuf = NULL;
1505 /****************************************************************************
1506 Free an OutBuffer. No outbuffers currently stolen by aio system.
1507 Must have been allocated by NewInBuffer.
1508 ****************************************************************************/
1510 void free_OutBuffer(char *outbuf)
1515 const int total_buffer_size = (BUFFER_SIZE + LARGE_WRITEX_HDR_SIZE + SAFETY_MARGIN);
1517 /****************************************************************************
1518 Allocate a new InBuffer. Returns the new and old ones.
1519 ****************************************************************************/
1521 char *NewInBuffer(char **old_inbuf)
1523 char *new_inbuf = (char *)SMB_MALLOC(total_buffer_size);
1528 *old_inbuf = InBuffer;
1530 InBuffer = new_inbuf;
1531 #if defined(DEVELOPER)
1532 clobber_region(SAFE_STRING_FUNCTION_NAME, SAFE_STRING_LINE, InBuffer, total_buffer_size);
1537 /****************************************************************************
1538 Allocate a new OutBuffer. Returns the new and old ones.
1539 ****************************************************************************/
1541 char *NewOutBuffer(char **old_outbuf)
1543 char *new_outbuf = (char *)SMB_MALLOC(total_buffer_size);
1548 *old_outbuf = OutBuffer;
1550 OutBuffer = new_outbuf;
1551 #if defined(DEVELOPER)
1552 clobber_region(SAFE_STRING_FUNCTION_NAME, SAFE_STRING_LINE, OutBuffer, total_buffer_size);
1557 /****************************************************************************
1558 Process commands from the client
1559 ****************************************************************************/
1561 void smbd_process(void)
1563 time_t last_timeout_processing_time = time(NULL);
1564 unsigned int num_smbs = 0;
1566 /* Allocate the primary Inbut/Output buffers. */
1568 if ((NewInBuffer(NULL) == NULL) || (NewOutBuffer(NULL) == NULL))
1571 max_recv = MIN(lp_maxxmit(),BUFFER_SIZE);
1574 int deadtime = lp_deadtime()*60;
1575 int select_timeout = setup_select_timeout();
1579 deadtime = DEFAULT_SMBD_TIMEOUT;
1583 /* free up temporary memory */
1585 main_loop_TALLOC_FREE();
1587 /* Did someone ask for immediate checks on things like blocking locks ? */
1588 if (select_timeout == 0) {
1589 if(!timeout_processing( deadtime, &select_timeout, &last_timeout_processing_time))
1591 num_smbs = 0; /* Reset smb counter. */
1596 #if defined(DEVELOPER)
1597 clobber_region(SAFE_STRING_FUNCTION_NAME, SAFE_STRING_LINE, InBuffer, total_buffer_size);
1600 while (!receive_message_or_smb(InBuffer,BUFFER_SIZE+LARGE_WRITEX_HDR_SIZE,select_timeout)) {
1601 if(!timeout_processing( deadtime, &select_timeout, &last_timeout_processing_time))
1603 num_smbs = 0; /* Reset smb counter. */
1607 * Ensure we do timeout processing if the SMB we just got was
1608 * only an echo request. This allows us to set the select
1609 * timeout in 'receive_message_or_smb()' to any value we like
1610 * without worrying that the client will send echo requests
1611 * faster than the select timeout, thus starving out the
1612 * essential processing (change notify, blocking locks) that
1613 * the timeout code does. JRA.
1615 num_echos = smb_echo_count;
1617 clobber_region(SAFE_STRING_FUNCTION_NAME, SAFE_STRING_LINE, OutBuffer, total_buffer_size);
1619 process_smb(InBuffer, OutBuffer);
1621 if (smb_echo_count != num_echos) {
1622 if(!timeout_processing( deadtime, &select_timeout, &last_timeout_processing_time))
1624 num_smbs = 0; /* Reset smb counter. */
1630 * If we are getting smb requests in a constant stream
1631 * with no echos, make sure we attempt timeout processing
1632 * every select_timeout milliseconds - but only check for this
1633 * every 200 smb requests.
1636 if ((num_smbs % 200) == 0) {
1637 time_t new_check_time = time(NULL);
1638 if(new_check_time - last_timeout_processing_time >= (select_timeout/1000)) {
1639 if(!timeout_processing( deadtime, &select_timeout, &last_timeout_processing_time))
1641 num_smbs = 0; /* Reset smb counter. */
1642 last_timeout_processing_time = new_check_time; /* Reset time. */
1646 /* The timeout_processing function isn't run nearly
1647 often enough to implement 'max log size' without
1648 overrunning the size of the file by many megabytes.
1649 This is especially true if we are running at debug
1650 level 10. Checking every 50 SMBs is a nice
1651 tradeoff of performance vs log file size overrun. */
1653 if ((num_smbs % 50) == 0 && need_to_check_log_size()) {
1654 change_to_root_user();