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 Keep track of the number of running smbd's. This functionality is used to
1036 'hard' limit Samba overhead on resource constrained systems.
1037 ****************************************************************************/
1039 static BOOL process_count_update_successful = False;
1041 static int32 increment_smbd_process_count(void)
1045 if (lp_max_smbd_processes()) {
1047 if (tdb_change_int32_atomic(conn_tdb_ctx(), "INFO/total_smbds", &total_smbds, 1) == -1)
1049 process_count_update_successful = True;
1050 return total_smbds + 1;
1055 void decrement_smbd_process_count(void)
1059 if (lp_max_smbd_processes() && process_count_update_successful) {
1061 tdb_change_int32_atomic(conn_tdb_ctx(), "INFO/total_smbds", &total_smbds, -1);
1065 static BOOL smbd_process_limit(void)
1069 if (lp_max_smbd_processes()) {
1071 /* Always add one to the smbd process count, as exit_server() always
1075 if (!conn_tdb_ctx()) {
1076 DEBUG(0,("smbd_process_limit: max smbd processes parameter set with status parameter not \
1077 set. Ignoring max smbd restriction.\n"));
1081 total_smbds = increment_smbd_process_count();
1082 return total_smbds > lp_max_smbd_processes();
1088 /****************************************************************************
1089 Process an smb from the client
1090 ****************************************************************************/
1092 static void process_smb(char *inbuf, char *outbuf)
1094 static int trans_num;
1095 int msg_type = CVAL(inbuf,0);
1096 int32 len = smb_len(inbuf);
1097 int nread = len + 4;
1099 DO_PROFILE_INC(smb_count);
1101 if (trans_num == 0) {
1102 /* on the first packet, check the global hosts allow/ hosts
1103 deny parameters before doing any parsing of the packet
1104 passed to us by the client. This prevents attacks on our
1105 parsing code from hosts not in the hosts allow list */
1106 if (smbd_process_limit() ||
1107 !check_access(smbd_server_fd(), lp_hostsallow(-1), lp_hostsdeny(-1))) {
1108 /* send a negative session response "not listening on calling name" */
1109 static unsigned char buf[5] = {0x83, 0, 0, 1, 0x81};
1110 DEBUG( 1, ( "Connection denied from %s\n", client_addr() ) );
1111 (void)send_smb(smbd_server_fd(),(char *)buf);
1112 exit_server_cleanly("connection denied");
1116 DEBUG( 6, ( "got message type 0x%x of len 0x%x\n", msg_type, len ) );
1117 DEBUG( 3, ( "Transaction %d of length %d\n", trans_num, nread ) );
1121 else if(msg_type == SMBkeepalive)
1122 return; /* Keepalive packet. */
1124 nread = construct_reply(inbuf,outbuf,nread,max_send);
1127 if (CVAL(outbuf,0) == 0)
1130 if (nread != smb_len(outbuf) + 4) {
1131 DEBUG(0,("ERROR: Invalid message response size! %d %d\n",
1132 nread, smb_len(outbuf)));
1133 } else if (!send_smb(smbd_server_fd(),outbuf)) {
1134 exit_server_cleanly("process_smb: send_smb failed.");
1140 /****************************************************************************
1141 Return a string containing the function name of a SMB command.
1142 ****************************************************************************/
1144 const char *smb_fn_name(int type)
1146 const char *unknown_name = "SMBunknown";
1148 if (smb_messages[type].name == NULL)
1149 return(unknown_name);
1151 return(smb_messages[type].name);
1154 /****************************************************************************
1155 Helper functions for contruct_reply.
1156 ****************************************************************************/
1158 static uint32 common_flags2 = FLAGS2_LONG_PATH_COMPONENTS|FLAGS2_32_BIT_ERROR_CODES;
1160 void add_to_common_flags2(uint32 v)
1165 void remove_from_common_flags2(uint32 v)
1167 common_flags2 &= ~v;
1170 void construct_reply_common(char *inbuf,char *outbuf)
1172 set_message(outbuf,0,0,False);
1174 SCVAL(outbuf,smb_com,CVAL(inbuf,smb_com));
1175 SIVAL(outbuf,smb_rcls,0);
1176 SCVAL(outbuf,smb_flg, FLAG_REPLY | (CVAL(inbuf,smb_flg) & FLAG_CASELESS_PATHNAMES));
1177 SSVAL(outbuf,smb_flg2,
1178 (SVAL(inbuf,smb_flg2) & FLAGS2_UNICODE_STRINGS) |
1180 memset(outbuf+smb_pidhigh,'\0',(smb_tid-smb_pidhigh));
1182 SSVAL(outbuf,smb_tid,SVAL(inbuf,smb_tid));
1183 SSVAL(outbuf,smb_pid,SVAL(inbuf,smb_pid));
1184 SSVAL(outbuf,smb_uid,SVAL(inbuf,smb_uid));
1185 SSVAL(outbuf,smb_mid,SVAL(inbuf,smb_mid));
1188 /****************************************************************************
1189 Construct a chained reply and add it to the already made reply
1190 ****************************************************************************/
1192 int chain_reply(char *inbuf,char *outbuf,int size,int bufsize)
1194 static char *orig_inbuf;
1195 static char *orig_outbuf;
1196 int smb_com1, smb_com2 = CVAL(inbuf,smb_vwv0);
1197 unsigned smb_off2 = SVAL(inbuf,smb_vwv1);
1198 char *inbuf2, *outbuf2;
1200 char inbuf_saved[smb_wct];
1201 char outbuf_saved[smb_wct];
1202 int outsize = smb_len(outbuf) + 4;
1204 /* maybe its not chained */
1205 if (smb_com2 == 0xFF) {
1206 SCVAL(outbuf,smb_vwv0,0xFF);
1210 if (chain_size == 0) {
1211 /* this is the first part of the chain */
1213 orig_outbuf = outbuf;
1217 * The original Win95 redirector dies on a reply to
1218 * a lockingX and read chain unless the chain reply is
1219 * 4 byte aligned. JRA.
1222 outsize = (outsize + 3) & ~3;
1224 /* we need to tell the client where the next part of the reply will be */
1225 SSVAL(outbuf,smb_vwv1,smb_offset(outbuf+outsize,outbuf));
1226 SCVAL(outbuf,smb_vwv0,smb_com2);
1228 /* remember how much the caller added to the chain, only counting stuff
1229 after the parameter words */
1230 chain_size += outsize - smb_wct;
1232 /* work out pointers into the original packets. The
1233 headers on these need to be filled in */
1234 inbuf2 = orig_inbuf + smb_off2 + 4 - smb_wct;
1235 outbuf2 = orig_outbuf + SVAL(outbuf,smb_vwv1) + 4 - smb_wct;
1237 /* remember the original command type */
1238 smb_com1 = CVAL(orig_inbuf,smb_com);
1240 /* save the data which will be overwritten by the new headers */
1241 memcpy(inbuf_saved,inbuf2,smb_wct);
1242 memcpy(outbuf_saved,outbuf2,smb_wct);
1244 /* give the new packet the same header as the last part of the SMB */
1245 memmove(inbuf2,inbuf,smb_wct);
1247 /* create the in buffer */
1248 SCVAL(inbuf2,smb_com,smb_com2);
1250 /* create the out buffer */
1251 construct_reply_common(inbuf2, outbuf2);
1253 DEBUG(3,("Chained message\n"));
1256 /* process the request */
1257 outsize2 = switch_message(smb_com2,inbuf2,outbuf2,size-chain_size,
1258 bufsize-chain_size);
1260 /* copy the new reply and request headers over the old ones, but
1261 preserve the smb_com field */
1262 memmove(orig_outbuf,outbuf2,smb_wct);
1263 SCVAL(orig_outbuf,smb_com,smb_com1);
1265 /* restore the saved data, being careful not to overwrite any
1266 data from the reply header */
1267 memcpy(inbuf2,inbuf_saved,smb_wct);
1270 int ofs = smb_wct - PTR_DIFF(outbuf2,orig_outbuf);
1271 if (ofs < 0) ofs = 0;
1272 memmove(outbuf2+ofs,outbuf_saved+ofs,smb_wct-ofs);
1278 /****************************************************************************
1279 Setup the needed select timeout.
1280 ****************************************************************************/
1282 static int setup_select_timeout(void)
1287 select_timeout = blocking_locks_timeout(SMBD_SELECT_TIMEOUT);
1288 select_timeout *= 1000;
1290 t = change_notify_timeout();
1291 DEBUG(10, ("change_notify_timeout: %d\n", t));
1293 select_timeout = MIN(select_timeout, t*1000);
1295 if (print_notify_messages_pending())
1296 select_timeout = MIN(select_timeout, 1000);
1298 return select_timeout;
1301 /****************************************************************************
1302 Check if services need reloading.
1303 ****************************************************************************/
1305 void check_reload(time_t t)
1307 static pid_t mypid = 0;
1308 static time_t last_smb_conf_reload_time = 0;
1309 static time_t last_printer_reload_time = 0;
1310 time_t printcap_cache_time = (time_t)lp_printcap_cache_time();
1312 if(last_smb_conf_reload_time == 0) {
1313 last_smb_conf_reload_time = t;
1314 /* Our printing subsystem might not be ready at smbd start up.
1315 Then no printer is available till the first printers check
1316 is performed. A lower initial interval circumvents this. */
1317 if ( printcap_cache_time > 60 )
1318 last_printer_reload_time = t - printcap_cache_time + 60;
1320 last_printer_reload_time = t;
1323 if (mypid != getpid()) { /* First time or fork happened meanwhile */
1324 /* randomize over 60 second the printcap reload to avoid all
1325 * process hitting cupsd at the same time */
1326 int time_range = 60;
1328 last_printer_reload_time += random() % time_range;
1332 if (reload_after_sighup || (t >= last_smb_conf_reload_time+SMBD_RELOAD_CHECK)) {
1333 reload_services(True);
1334 reload_after_sighup = False;
1335 last_smb_conf_reload_time = t;
1338 /* 'printcap cache time = 0' disable the feature */
1340 if ( printcap_cache_time != 0 )
1342 /* see if it's time to reload or if the clock has been set back */
1344 if ( (t >= last_printer_reload_time+printcap_cache_time)
1345 || (t-last_printer_reload_time < 0) )
1347 DEBUG( 3,( "Printcap cache time expired.\n"));
1349 last_printer_reload_time = t;
1354 /****************************************************************************
1355 Process any timeout housekeeping. Return False if the caller should exit.
1356 ****************************************************************************/
1358 static BOOL timeout_processing(int deadtime, int *select_timeout, time_t *last_timeout_processing_time)
1360 static time_t last_keepalive_sent_time = 0;
1361 static time_t last_idle_closed_check = 0;
1363 BOOL allidle = True;
1365 if (smb_read_error == READ_EOF) {
1366 DEBUG(3,("timeout_processing: End of file from client (client has disconnected).\n"));
1370 if (smb_read_error == READ_ERROR) {
1371 DEBUG(3,("timeout_processing: receive_smb error (%s) Exiting\n",
1376 if (smb_read_error == READ_BAD_SIG) {
1377 DEBUG(3,("timeout_processing: receive_smb error bad smb signature. Exiting\n"));
1381 *last_timeout_processing_time = t = time(NULL);
1383 if(last_keepalive_sent_time == 0)
1384 last_keepalive_sent_time = t;
1386 if(last_idle_closed_check == 0)
1387 last_idle_closed_check = t;
1389 /* become root again if waiting */
1390 change_to_root_user();
1392 /* run all registered idle events */
1393 smb_run_idle_events(t);
1395 /* check if we need to reload services */
1398 /* automatic timeout if all connections are closed */
1399 if (conn_num_open()==0 && (t - last_idle_closed_check) >= IDLE_CLOSED_TIMEOUT) {
1400 DEBUG( 2, ( "Closing idle connection\n" ) );
1403 last_idle_closed_check = t;
1406 if (keepalive && (t - last_keepalive_sent_time)>keepalive) {
1407 if (!send_keepalive(smbd_server_fd())) {
1408 DEBUG( 2, ( "Keepalive failed - exiting.\n" ) );
1412 /* send a keepalive for a password server or the like.
1413 This is attached to the auth_info created in the
1415 if (negprot_global_auth_context && negprot_global_auth_context->challenge_set_method
1416 && negprot_global_auth_context->challenge_set_method->send_keepalive) {
1418 negprot_global_auth_context->challenge_set_method->send_keepalive
1419 (&negprot_global_auth_context->challenge_set_method->private_data);
1422 last_keepalive_sent_time = t;
1425 /* check for connection timeouts */
1426 allidle = conn_idle_all(t, deadtime);
1428 if (allidle && conn_num_open()>0) {
1429 DEBUG(2,("Closing idle connection 2.\n"));
1433 if(global_machine_password_needs_changing &&
1434 /* for ADS we need to do a regular ADS password change, not a domain
1436 lp_security() == SEC_DOMAIN) {
1438 unsigned char trust_passwd_hash[16];
1442 * We're in domain level security, and the code that
1443 * read the machine password flagged that the machine
1444 * password needs changing.
1448 * First, open the machine password file with an exclusive lock.
1451 if (secrets_lock_trust_account_password(lp_workgroup(), True) == False) {
1452 DEBUG(0,("process: unable to lock the machine account password for \
1453 machine %s in domain %s.\n", global_myname(), lp_workgroup() ));
1457 if(!secrets_fetch_trust_account_password(lp_workgroup(), trust_passwd_hash, &lct, NULL)) {
1458 DEBUG(0,("process: unable to read the machine account password for \
1459 machine %s in domain %s.\n", global_myname(), lp_workgroup()));
1460 secrets_lock_trust_account_password(lp_workgroup(), False);
1465 * Make sure someone else hasn't already done this.
1468 if(t < lct + lp_machine_password_timeout()) {
1469 global_machine_password_needs_changing = False;
1470 secrets_lock_trust_account_password(lp_workgroup(), False);
1474 /* always just contact the PDC here */
1476 change_trust_account_password( lp_workgroup(), NULL);
1477 global_machine_password_needs_changing = False;
1478 secrets_lock_trust_account_password(lp_workgroup(), False);
1482 * Check to see if we have any blocking locks
1483 * outstanding on the queue.
1485 process_blocking_lock_queue(t);
1487 /* update printer queue caches if necessary */
1489 update_monitored_printq_cache();
1492 * Check to see if we have any change notifies
1493 * outstanding on the queue.
1495 process_pending_change_notify_queue(t);
1498 * Now we are root, check if the log files need pruning.
1499 * Force a log file check.
1501 force_check_log_size();
1504 /* Send any queued printer notify message to interested smbd's. */
1506 print_notify_send_messages(0);
1509 * Modify the select timeout depending upon
1510 * what we have remaining in our queues.
1513 *select_timeout = setup_select_timeout();
1518 /****************************************************************************
1519 Accessor functions for InBuffer, OutBuffer.
1520 ****************************************************************************/
1522 char *get_InBuffer(void)
1527 void set_InBuffer(char *new_inbuf)
1529 InBuffer = new_inbuf;
1530 current_inbuf = InBuffer;
1533 char *get_OutBuffer(void)
1538 void set_OutBuffer(char *new_outbuf)
1540 OutBuffer = new_outbuf;
1543 /****************************************************************************
1544 Free an InBuffer. Checks if not in use by aio system.
1545 Must have been allocated by NewInBuffer.
1546 ****************************************************************************/
1548 void free_InBuffer(char *inbuf)
1550 if (!aio_inbuffer_in_use(inbuf)) {
1551 if (current_inbuf == inbuf) {
1552 current_inbuf = NULL;
1558 /****************************************************************************
1559 Free an OutBuffer. No outbuffers currently stolen by aio system.
1560 Must have been allocated by NewInBuffer.
1561 ****************************************************************************/
1563 void free_OutBuffer(char *outbuf)
1568 const int total_buffer_size = (BUFFER_SIZE + LARGE_WRITEX_HDR_SIZE + SAFETY_MARGIN);
1570 /****************************************************************************
1571 Allocate a new InBuffer. Returns the new and old ones.
1572 ****************************************************************************/
1574 char *NewInBuffer(char **old_inbuf)
1576 char *new_inbuf = (char *)SMB_MALLOC(total_buffer_size);
1581 *old_inbuf = InBuffer;
1583 InBuffer = new_inbuf;
1584 #if defined(DEVELOPER)
1585 clobber_region(SAFE_STRING_FUNCTION_NAME, SAFE_STRING_LINE, InBuffer, total_buffer_size);
1590 /****************************************************************************
1591 Allocate a new OutBuffer. Returns the new and old ones.
1592 ****************************************************************************/
1594 char *NewOutBuffer(char **old_outbuf)
1596 char *new_outbuf = (char *)SMB_MALLOC(total_buffer_size);
1601 *old_outbuf = OutBuffer;
1603 OutBuffer = new_outbuf;
1604 #if defined(DEVELOPER)
1605 clobber_region(SAFE_STRING_FUNCTION_NAME, SAFE_STRING_LINE, OutBuffer, total_buffer_size);
1610 /****************************************************************************
1611 Process commands from the client
1612 ****************************************************************************/
1614 void smbd_process(void)
1616 time_t last_timeout_processing_time = time(NULL);
1617 unsigned int num_smbs = 0;
1619 /* Allocate the primary Inbut/Output buffers. */
1621 if ((NewInBuffer(NULL) == NULL) || (NewOutBuffer(NULL) == NULL))
1624 max_recv = MIN(lp_maxxmit(),BUFFER_SIZE);
1627 int deadtime = lp_deadtime()*60;
1628 int select_timeout = setup_select_timeout();
1632 deadtime = DEFAULT_SMBD_TIMEOUT;
1636 /* free up temporary memory */
1638 main_loop_TALLOC_FREE();
1640 /* Did someone ask for immediate checks on things like blocking locks ? */
1641 if (select_timeout == 0) {
1642 if(!timeout_processing( deadtime, &select_timeout, &last_timeout_processing_time))
1644 num_smbs = 0; /* Reset smb counter. */
1649 #if defined(DEVELOPER)
1650 clobber_region(SAFE_STRING_FUNCTION_NAME, SAFE_STRING_LINE, InBuffer, total_buffer_size);
1653 while (!receive_message_or_smb(InBuffer,BUFFER_SIZE+LARGE_WRITEX_HDR_SIZE,select_timeout)) {
1654 if(!timeout_processing( deadtime, &select_timeout, &last_timeout_processing_time))
1656 num_smbs = 0; /* Reset smb counter. */
1660 * Ensure we do timeout processing if the SMB we just got was
1661 * only an echo request. This allows us to set the select
1662 * timeout in 'receive_message_or_smb()' to any value we like
1663 * without worrying that the client will send echo requests
1664 * faster than the select timeout, thus starving out the
1665 * essential processing (change notify, blocking locks) that
1666 * the timeout code does. JRA.
1668 num_echos = smb_echo_count;
1670 clobber_region(SAFE_STRING_FUNCTION_NAME, SAFE_STRING_LINE, OutBuffer, total_buffer_size);
1672 process_smb(InBuffer, OutBuffer);
1674 if (smb_echo_count != num_echos) {
1675 if(!timeout_processing( deadtime, &select_timeout, &last_timeout_processing_time))
1677 num_smbs = 0; /* Reset smb counter. */
1683 * If we are getting smb requests in a constant stream
1684 * with no echos, make sure we attempt timeout processing
1685 * every select_timeout milliseconds - but only check for this
1686 * every 200 smb requests.
1689 if ((num_smbs % 200) == 0) {
1690 time_t new_check_time = time(NULL);
1691 if(new_check_time - last_timeout_processing_time >= (select_timeout/1000)) {
1692 if(!timeout_processing( deadtime, &select_timeout, &last_timeout_processing_time))
1694 num_smbs = 0; /* Reset smb counter. */
1695 last_timeout_processing_time = new_check_time; /* Reset time. */
1699 /* The timeout_processing function isn't run nearly
1700 often enough to implement 'max log size' without
1701 overrunning the size of the file by many megabytes.
1702 This is especially true if we are running at debug
1703 level 10. Checking every 50 SMBs is a nice
1704 tradeoff of performance vs log file size overrun. */
1706 if ((num_smbs % 50) == 0 && need_to_check_log_size()) {
1707 change_to_root_user();