D-Bus 1.12.20
dbus-connection.c
1/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2/* dbus-connection.c DBusConnection object
3 *
4 * Copyright (C) 2002-2006 Red Hat Inc.
5 *
6 * Licensed under the Academic Free License version 2.1
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 *
22 */
23
24#include <config.h>
25#include "dbus-shared.h"
26#include "dbus-connection.h"
27#include "dbus-list.h"
28#include "dbus-timeout.h"
29#include "dbus-transport.h"
30#include "dbus-watch.h"
31#include "dbus-connection-internal.h"
32#include "dbus-pending-call-internal.h"
33#include "dbus-list.h"
34#include "dbus-hash.h"
35#include "dbus-message-internal.h"
36#include "dbus-message-private.h"
37#include "dbus-threads.h"
38#include "dbus-protocol.h"
39#include "dbus-dataslot.h"
40#include "dbus-string.h"
41#include "dbus-signature.h"
42#include "dbus-pending-call.h"
43#include "dbus-object-tree.h"
44#include "dbus-threads-internal.h"
45#include "dbus-bus.h"
46#include "dbus-marshal-basic.h"
47
48#ifdef DBUS_DISABLE_CHECKS
49#define TOOK_LOCK_CHECK(connection)
50#define RELEASING_LOCK_CHECK(connection)
51#define HAVE_LOCK_CHECK(connection)
52#else
53#define TOOK_LOCK_CHECK(connection) do { \
54 _dbus_assert (!(connection)->have_connection_lock); \
55 (connection)->have_connection_lock = TRUE; \
56 } while (0)
57#define RELEASING_LOCK_CHECK(connection) do { \
58 _dbus_assert ((connection)->have_connection_lock); \
59 (connection)->have_connection_lock = FALSE; \
60 } while (0)
61#define HAVE_LOCK_CHECK(connection) _dbus_assert ((connection)->have_connection_lock)
62/* A "DO_NOT_HAVE_LOCK_CHECK" is impossible since we need the lock to check the flag */
63#endif
64
65#define TRACE_LOCKS 1
66
67#define CONNECTION_LOCK(connection) do { \
68 if (TRACE_LOCKS) { _dbus_verbose ("LOCK\n"); } \
69 _dbus_rmutex_lock ((connection)->mutex); \
70 TOOK_LOCK_CHECK (connection); \
71 } while (0)
72
73#define CONNECTION_UNLOCK(connection) _dbus_connection_unlock (connection)
74
75#define SLOTS_LOCK(connection) do { \
76 _dbus_rmutex_lock ((connection)->slot_mutex); \
77 } while (0)
78
79#define SLOTS_UNLOCK(connection) do { \
80 _dbus_rmutex_unlock ((connection)->slot_mutex); \
81 } while (0)
82
83#define DISPATCH_STATUS_NAME(s) \
84 ((s) == DBUS_DISPATCH_COMPLETE ? "complete" : \
85 (s) == DBUS_DISPATCH_DATA_REMAINS ? "data remains" : \
86 (s) == DBUS_DISPATCH_NEED_MEMORY ? "need memory" : \
87 "???")
88
206static void
207_dbus_connection_trace_ref (DBusConnection *connection,
208 int old_refcount,
209 int new_refcount,
210 const char *why)
211{
212#ifdef DBUS_ENABLE_VERBOSE_MODE
213 static int enabled = -1;
214
215 _dbus_trace_ref ("DBusConnection", connection, old_refcount, new_refcount,
216 why, "DBUS_CONNECTION_TRACE", &enabled);
217#endif
218}
219
224
229{
232 void *user_data;
234};
235
236
241{
245};
246
247#if HAVE_DECL_MSG_NOSIGNAL
248static dbus_bool_t _dbus_modify_sigpipe = FALSE;
249#else
250static dbus_bool_t _dbus_modify_sigpipe = TRUE;
251#endif
252
257{
308 /* These two MUST be bools and not bitfields, because they are protected by a separate lock
309 * from connection->mutex and all bitfields in a word have to be read/written together.
310 * So you can't have a different lock for different bitfields in the same word.
311 */
315 unsigned int shareable : 1;
317 unsigned int exit_on_disconnect : 1;
319 unsigned int route_peer_messages : 1;
329#ifndef DBUS_DISABLE_CHECKS
330 unsigned int have_connection_lock : 1;
331#endif
332
333#if defined(DBUS_ENABLE_CHECKS) || defined(DBUS_ENABLE_ASSERT)
334 int generation;
335#endif
336};
337
338static DBusDispatchStatus _dbus_connection_get_dispatch_status_unlocked (DBusConnection *connection);
339static void _dbus_connection_update_dispatch_status_and_unlock (DBusConnection *connection,
340 DBusDispatchStatus new_status);
341static void _dbus_connection_last_unref (DBusConnection *connection);
342static void _dbus_connection_acquire_dispatch (DBusConnection *connection);
343static void _dbus_connection_release_dispatch (DBusConnection *connection);
344static DBusDispatchStatus _dbus_connection_flush_unlocked (DBusConnection *connection);
345static void _dbus_connection_close_possibly_shared_and_unlock (DBusConnection *connection);
346static dbus_bool_t _dbus_connection_get_is_connected_unlocked (DBusConnection *connection);
347static dbus_bool_t _dbus_connection_peek_for_reply_unlocked (DBusConnection *connection,
348 dbus_uint32_t client_serial);
349
350static DBusMessageFilter *
351_dbus_message_filter_ref (DBusMessageFilter *filter)
352{
353#ifdef DBUS_DISABLE_ASSERT
354 _dbus_atomic_inc (&filter->refcount);
355#else
356 dbus_int32_t old_value;
357
358 old_value = _dbus_atomic_inc (&filter->refcount);
359 _dbus_assert (old_value > 0);
360#endif
361
362 return filter;
363}
364
365static void
366_dbus_message_filter_unref (DBusMessageFilter *filter)
367{
368 dbus_int32_t old_value;
369
370 old_value = _dbus_atomic_dec (&filter->refcount);
371 _dbus_assert (old_value > 0);
372
373 if (old_value == 1)
374 {
375 if (filter->free_user_data_function)
376 (* filter->free_user_data_function) (filter->user_data);
377
378 dbus_free (filter);
379 }
380}
381
387void
389{
390 CONNECTION_LOCK (connection);
391}
392
398void
400{
401 DBusList *expired_messages;
402 DBusList *iter;
403
404 if (TRACE_LOCKS)
405 {
406 _dbus_verbose ("UNLOCK\n");
407 }
408
409 /* If we had messages that expired (fell off the incoming or outgoing
410 * queues) while we were locked, actually release them now */
411 expired_messages = connection->expired_messages;
412 connection->expired_messages = NULL;
413
414 RELEASING_LOCK_CHECK (connection);
415 _dbus_rmutex_unlock (connection->mutex);
416
417 for (iter = _dbus_list_pop_first_link (&expired_messages);
418 iter != NULL;
419 iter = _dbus_list_pop_first_link (&expired_messages))
420 {
421 DBusMessage *message = iter->data;
422
423 dbus_message_unref (message);
425 }
426}
427
435static void
436_dbus_connection_wakeup_mainloop (DBusConnection *connection)
437{
438 if (connection->wakeup_main_function)
439 (*connection->wakeup_main_function) (connection->wakeup_main_data);
440}
441
442#ifdef DBUS_ENABLE_EMBEDDED_TESTS
455void
456_dbus_connection_test_get_locks (DBusConnection *connection,
457 DBusMutex **mutex_loc,
458 DBusMutex **dispatch_mutex_loc,
459 DBusMutex **io_path_mutex_loc,
460 DBusCondVar **dispatch_cond_loc,
461 DBusCondVar **io_path_cond_loc)
462{
463 *mutex_loc = (DBusMutex *) connection->mutex;
464 *dispatch_mutex_loc = (DBusMutex *) connection->dispatch_mutex;
465 *io_path_mutex_loc = (DBusMutex *) connection->io_path_mutex;
466 *dispatch_cond_loc = connection->dispatch_cond;
467 *io_path_cond_loc = connection->io_path_cond;
468}
469#endif
470
479void
481 DBusList *link)
482{
483 DBusPendingCall *pending;
484 dbus_uint32_t reply_serial;
485 DBusMessage *message;
486
488
490 link);
491 message = link->data;
492
493 /* If this is a reply we're waiting on, remove timeout for it */
494 reply_serial = dbus_message_get_reply_serial (message);
495 if (reply_serial != 0)
496 {
497 pending = _dbus_hash_table_lookup_int (connection->pending_replies,
498 reply_serial);
499 if (pending != NULL)
500 {
504
506 }
507 }
508
509
510
511 connection->n_incoming += 1;
512
513 _dbus_connection_wakeup_mainloop (connection);
514
515 _dbus_verbose ("Message %p (%s %s %s %s '%s' reply to %u) added to incoming queue %p, %d incoming\n",
516 message,
518 dbus_message_get_path (message) ?
519 dbus_message_get_path (message) :
520 "no path",
523 "no interface",
524 dbus_message_get_member (message) ?
525 dbus_message_get_member (message) :
526 "no member",
529 connection,
530 connection->n_incoming);
531
532 _dbus_message_trace_ref (message, -1, -1,
533 "_dbus_conection_queue_received_message_link");
534}
535
544void
546 DBusList *link)
547{
548 HAVE_LOCK_CHECK (connection);
549
550 _dbus_list_append_link (&connection->incoming_messages, link);
551
552 connection->n_incoming += 1;
553
554 _dbus_connection_wakeup_mainloop (connection);
555
556 _dbus_message_trace_ref (link->data, -1, -1,
557 "_dbus_connection_queue_synthesized_message_link");
558
559 _dbus_verbose ("Synthesized message %p added to incoming queue %p, %d incoming\n",
560 link->data, connection, connection->n_incoming);
561}
562
563
573{
574 HAVE_LOCK_CHECK (connection);
575 return connection->outgoing_messages != NULL;
576}
577
589{
590 dbus_bool_t v;
591
592 _dbus_return_val_if_fail (connection != NULL, FALSE);
593
594 CONNECTION_LOCK (connection);
596 CONNECTION_UNLOCK (connection);
597
598 return v;
599}
600
610{
611 HAVE_LOCK_CHECK (connection);
612
613 return _dbus_list_get_last (&connection->outgoing_messages);
614}
615
624void
626 DBusMessage *message)
627{
628 DBusList *link;
629
630 HAVE_LOCK_CHECK (connection);
631
632 /* This can be called before we even complete authentication, since
633 * it's called on disconnect to clean up the outgoing queue.
634 * It's also called as we successfully send each message.
635 */
636
637 link = _dbus_list_get_last_link (&connection->outgoing_messages);
638 _dbus_assert (link != NULL);
639 _dbus_assert (link->data == message);
640
642 link);
643 _dbus_list_prepend_link (&connection->expired_messages, link);
644
645 connection->n_outgoing -= 1;
646
647 _dbus_verbose ("Message %p (%s %s %s %s '%s') removed from outgoing queue %p, %d left to send\n",
648 message,
650 dbus_message_get_path (message) ?
651 dbus_message_get_path (message) :
652 "no path",
655 "no interface",
656 dbus_message_get_member (message) ?
657 dbus_message_get_member (message) :
658 "no member",
660 connection, connection->n_outgoing);
661
662 /* It's OK that in principle we call the notify function, because for the
663 * outgoing limit, there isn't one */
664 _dbus_message_remove_counter (message, connection->outgoing_counter);
665
666 /* The message will actually be unreffed when we unlock */
667}
668
671 DBusWatch *watch);
674 DBusWatch *watch);
677 DBusWatch *watch,
678 dbus_bool_t enabled);
679
680static dbus_bool_t
681protected_change_watch (DBusConnection *connection,
682 DBusWatch *watch,
683 DBusWatchAddFunction add_function,
684 DBusWatchRemoveFunction remove_function,
685 DBusWatchToggleFunction toggle_function,
686 dbus_bool_t enabled)
687{
688 dbus_bool_t retval;
689
690 HAVE_LOCK_CHECK (connection);
691
692 /* The original purpose of protected_change_watch() was to hold a
693 * ref on the connection while dropping the connection lock, then
694 * calling out to the app. This was a broken hack that did not
695 * work, since the connection was in a hosed state (no WatchList
696 * field) while calling out.
697 *
698 * So for now we'll just keep the lock while calling out. This means
699 * apps are not allowed to call DBusConnection methods inside a
700 * watch function or they will deadlock.
701 *
702 * The "real fix" is to use the _and_unlock() pattern found
703 * elsewhere in the code, to defer calling out to the app until
704 * we're about to drop locks and return flow of control to the app
705 * anyway.
706 *
707 * See http://lists.freedesktop.org/archives/dbus/2007-July/thread.html#8144
708 */
709
710 if (connection->watches)
711 {
712 if (add_function)
713 retval = (* add_function) (connection->watches, watch);
714 else if (remove_function)
715 {
716 retval = TRUE;
717 (* remove_function) (connection->watches, watch);
718 }
719 else
720 {
721 retval = TRUE;
722 (* toggle_function) (connection->watches, watch, enabled);
723 }
724 return retval;
725 }
726 else
727 return FALSE;
728}
729
730
744 DBusWatch *watch)
745{
746 return protected_change_watch (connection, watch,
748 NULL, NULL, FALSE);
749}
750
760void
762 DBusWatch *watch)
763{
764 protected_change_watch (connection, watch,
765 NULL,
767 NULL, FALSE);
768}
769
780void
782 DBusWatch *watch,
783 dbus_bool_t enabled)
784{
785 _dbus_assert (watch != NULL);
786
787 protected_change_watch (connection, watch,
788 NULL, NULL,
790 enabled);
791}
792
795 DBusTimeout *timeout);
798 DBusTimeout *timeout);
801 DBusTimeout *timeout,
802 dbus_bool_t enabled);
803
804static dbus_bool_t
805protected_change_timeout (DBusConnection *connection,
806 DBusTimeout *timeout,
807 DBusTimeoutAddFunction add_function,
808 DBusTimeoutRemoveFunction remove_function,
809 DBusTimeoutToggleFunction toggle_function,
810 dbus_bool_t enabled)
811{
812 dbus_bool_t retval;
813
814 HAVE_LOCK_CHECK (connection);
815
816 /* The original purpose of protected_change_timeout() was to hold a
817 * ref on the connection while dropping the connection lock, then
818 * calling out to the app. This was a broken hack that did not
819 * work, since the connection was in a hosed state (no TimeoutList
820 * field) while calling out.
821 *
822 * So for now we'll just keep the lock while calling out. This means
823 * apps are not allowed to call DBusConnection methods inside a
824 * timeout function or they will deadlock.
825 *
826 * The "real fix" is to use the _and_unlock() pattern found
827 * elsewhere in the code, to defer calling out to the app until
828 * we're about to drop locks and return flow of control to the app
829 * anyway.
830 *
831 * See http://lists.freedesktop.org/archives/dbus/2007-July/thread.html#8144
832 */
833
834 if (connection->timeouts)
835 {
836 if (add_function)
837 retval = (* add_function) (connection->timeouts, timeout);
838 else if (remove_function)
839 {
840 retval = TRUE;
841 (* remove_function) (connection->timeouts, timeout);
842 }
843 else
844 {
845 retval = TRUE;
846 (* toggle_function) (connection->timeouts, timeout, enabled);
847 }
848 return retval;
849 }
850 else
851 return FALSE;
852}
853
868 DBusTimeout *timeout)
869{
870 return protected_change_timeout (connection, timeout,
872 NULL, NULL, FALSE);
873}
874
884void
886 DBusTimeout *timeout)
887{
888 protected_change_timeout (connection, timeout,
889 NULL,
891 NULL, FALSE);
892}
893
904void
906 DBusTimeout *timeout,
907 dbus_bool_t enabled)
908{
909 protected_change_timeout (connection, timeout,
910 NULL, NULL,
912 enabled);
913}
914
915static dbus_bool_t
916_dbus_connection_attach_pending_call_unlocked (DBusConnection *connection,
917 DBusPendingCall *pending)
918{
919 dbus_uint32_t reply_serial;
920 DBusTimeout *timeout;
921
922 HAVE_LOCK_CHECK (connection);
923
924 reply_serial = _dbus_pending_call_get_reply_serial_unlocked (pending);
925
926 _dbus_assert (reply_serial != 0);
927
928 timeout = _dbus_pending_call_get_timeout_unlocked (pending);
929
930 if (timeout)
931 {
932 if (!_dbus_connection_add_timeout_unlocked (connection, timeout))
933 return FALSE;
934
936 reply_serial,
937 pending))
938 {
939 _dbus_connection_remove_timeout_unlocked (connection, timeout);
940
942 HAVE_LOCK_CHECK (connection);
943 return FALSE;
944 }
945
947 }
948 else
949 {
951 reply_serial,
952 pending))
953 {
954 HAVE_LOCK_CHECK (connection);
955 return FALSE;
956 }
957 }
958
960
961 HAVE_LOCK_CHECK (connection);
962
963 return TRUE;
964}
965
966static void
967free_pending_call_on_hash_removal (void *data)
968{
969 DBusPendingCall *pending;
970 DBusConnection *connection;
971
972 if (data == NULL)
973 return;
974
975 pending = data;
976
977 connection = _dbus_pending_call_get_connection_unlocked (pending);
978
979 HAVE_LOCK_CHECK (connection);
980
982 {
985
987 }
988
989 /* FIXME 1.0? this is sort of dangerous and undesirable to drop the lock
990 * here, but the pending call finalizer could in principle call out to
991 * application code so we pretty much have to... some larger code reorg
992 * might be needed.
993 */
996 CONNECTION_LOCK (connection);
998}
999
1000static void
1001_dbus_connection_detach_pending_call_unlocked (DBusConnection *connection,
1002 DBusPendingCall *pending)
1003{
1004 /* This ends up unlocking to call the pending call finalizer, which is unexpected to
1005 * say the least.
1006 */
1009}
1010
1011static void
1012_dbus_connection_detach_pending_call_and_unlock (DBusConnection *connection,
1013 DBusPendingCall *pending)
1014{
1015 /* The idea here is to avoid finalizing the pending call
1016 * with the lock held, since there's a destroy notifier
1017 * in pending call that goes out to application code.
1018 *
1019 * There's an extra unlock inside the hash table
1020 * "free pending call" function FIXME...
1021 */
1025
1029
1031
1033}
1034
1043void
1045 DBusPendingCall *pending)
1046{
1047 CONNECTION_LOCK (connection);
1048 _dbus_connection_detach_pending_call_and_unlock (connection, pending);
1049}
1050
1060static dbus_bool_t
1061_dbus_connection_acquire_io_path (DBusConnection *connection,
1062 int timeout_milliseconds)
1063{
1064 dbus_bool_t we_acquired;
1065
1066 HAVE_LOCK_CHECK (connection);
1067
1068 /* We don't want the connection to vanish */
1069 _dbus_connection_ref_unlocked (connection);
1070
1071 /* We will only touch io_path_acquired which is protected by our mutex */
1072 CONNECTION_UNLOCK (connection);
1073
1074 _dbus_verbose ("locking io_path_mutex\n");
1075 _dbus_cmutex_lock (connection->io_path_mutex);
1076
1077 _dbus_verbose ("start connection->io_path_acquired = %d timeout = %d\n",
1078 connection->io_path_acquired, timeout_milliseconds);
1079
1080 we_acquired = FALSE;
1081
1082 if (connection->io_path_acquired)
1083 {
1084 if (timeout_milliseconds != -1)
1085 {
1086 _dbus_verbose ("waiting %d for IO path to be acquirable\n",
1087 timeout_milliseconds);
1088
1089 if (!_dbus_condvar_wait_timeout (connection->io_path_cond,
1090 connection->io_path_mutex,
1091 timeout_milliseconds))
1092 {
1093 /* We timed out before anyone signaled. */
1094 /* (writing the loop to handle the !timedout case by
1095 * waiting longer if needed is a pain since dbus
1096 * wraps pthread_cond_timedwait to take a relative
1097 * time instead of absolute, something kind of stupid
1098 * on our part. for now it doesn't matter, we will just
1099 * end up back here eventually.)
1100 */
1101 }
1102 }
1103 else
1104 {
1105 while (connection->io_path_acquired)
1106 {
1107 _dbus_verbose ("waiting for IO path to be acquirable\n");
1108 _dbus_condvar_wait (connection->io_path_cond,
1109 connection->io_path_mutex);
1110 }
1111 }
1112 }
1113
1114 if (!connection->io_path_acquired)
1115 {
1116 we_acquired = TRUE;
1117 connection->io_path_acquired = TRUE;
1118 }
1119
1120 _dbus_verbose ("end connection->io_path_acquired = %d we_acquired = %d\n",
1121 connection->io_path_acquired, we_acquired);
1122
1123 _dbus_verbose ("unlocking io_path_mutex\n");
1124 _dbus_cmutex_unlock (connection->io_path_mutex);
1125
1126 CONNECTION_LOCK (connection);
1127
1128 HAVE_LOCK_CHECK (connection);
1129
1131
1132 return we_acquired;
1133}
1134
1142static void
1143_dbus_connection_release_io_path (DBusConnection *connection)
1144{
1145 HAVE_LOCK_CHECK (connection);
1146
1147 _dbus_verbose ("locking io_path_mutex\n");
1148 _dbus_cmutex_lock (connection->io_path_mutex);
1149
1150 _dbus_assert (connection->io_path_acquired);
1151
1152 _dbus_verbose ("start connection->io_path_acquired = %d\n",
1153 connection->io_path_acquired);
1154
1155 connection->io_path_acquired = FALSE;
1157
1158 _dbus_verbose ("unlocking io_path_mutex\n");
1159 _dbus_cmutex_unlock (connection->io_path_mutex);
1160}
1161
1197void
1199 DBusPendingCall *pending,
1200 unsigned int flags,
1201 int timeout_milliseconds)
1202{
1203 _dbus_verbose ("start\n");
1204
1205 HAVE_LOCK_CHECK (connection);
1206
1207 if (connection->n_outgoing == 0)
1208 flags &= ~DBUS_ITERATION_DO_WRITING;
1209
1210 if (_dbus_connection_acquire_io_path (connection,
1211 (flags & DBUS_ITERATION_BLOCK) ? timeout_milliseconds : 0))
1212 {
1213 HAVE_LOCK_CHECK (connection);
1214
1215 if ( (pending != NULL) && _dbus_pending_call_get_completed_unlocked(pending))
1216 {
1217 _dbus_verbose ("pending call completed while acquiring I/O path");
1218 }
1219 else if ( (pending != NULL) &&
1220 _dbus_connection_peek_for_reply_unlocked (connection,
1222 {
1223 _dbus_verbose ("pending call completed while acquiring I/O path (reply found in queue)");
1224 }
1225 else
1226 {
1228 flags, timeout_milliseconds);
1229 }
1230
1231 _dbus_connection_release_io_path (connection);
1232 }
1233
1234 HAVE_LOCK_CHECK (connection);
1235
1236 _dbus_verbose ("end\n");
1237}
1238
1250{
1251 DBusConnection *connection;
1252 DBusWatchList *watch_list;
1253 DBusTimeoutList *timeout_list;
1254 DBusHashTable *pending_replies;
1255 DBusList *disconnect_link;
1256 DBusMessage *disconnect_message;
1257 DBusCounter *outgoing_counter;
1258 DBusObjectTree *objects;
1259
1260 watch_list = NULL;
1261 connection = NULL;
1262 pending_replies = NULL;
1263 timeout_list = NULL;
1264 disconnect_link = NULL;
1265 disconnect_message = NULL;
1266 outgoing_counter = NULL;
1267 objects = NULL;
1268
1269 watch_list = _dbus_watch_list_new ();
1270 if (watch_list == NULL)
1271 goto error;
1272
1273 timeout_list = _dbus_timeout_list_new ();
1274 if (timeout_list == NULL)
1275 goto error;
1276
1277 pending_replies =
1279 NULL,
1280 (DBusFreeFunction)free_pending_call_on_hash_removal);
1281 if (pending_replies == NULL)
1282 goto error;
1283
1284 connection = dbus_new0 (DBusConnection, 1);
1285 if (connection == NULL)
1286 goto error;
1287
1288 _dbus_rmutex_new_at_location (&connection->mutex);
1289 if (connection->mutex == NULL)
1290 goto error;
1291
1293 if (connection->io_path_mutex == NULL)
1294 goto error;
1295
1297 if (connection->dispatch_mutex == NULL)
1298 goto error;
1299
1301 if (connection->dispatch_cond == NULL)
1302 goto error;
1303
1305 if (connection->io_path_cond == NULL)
1306 goto error;
1307
1309 if (connection->slot_mutex == NULL)
1310 goto error;
1311
1312 disconnect_message = dbus_message_new_signal (DBUS_PATH_LOCAL,
1314 "Disconnected");
1315
1316 if (disconnect_message == NULL)
1317 goto error;
1318
1319 disconnect_link = _dbus_list_alloc_link (disconnect_message);
1320 if (disconnect_link == NULL)
1321 goto error;
1322
1323 outgoing_counter = _dbus_counter_new ();
1324 if (outgoing_counter == NULL)
1325 goto error;
1326
1327 objects = _dbus_object_tree_new (connection);
1328 if (objects == NULL)
1329 goto error;
1330
1331 if (_dbus_modify_sigpipe)
1333
1334 /* initialized to 0: use atomic op to avoid mixing atomic and non-atomic */
1335 _dbus_atomic_inc (&connection->refcount);
1336 connection->transport = transport;
1337 connection->watches = watch_list;
1338 connection->timeouts = timeout_list;
1339 connection->pending_replies = pending_replies;
1340 connection->outgoing_counter = outgoing_counter;
1341 connection->filter_list = NULL;
1342 connection->last_dispatch_status = DBUS_DISPATCH_COMPLETE; /* so we're notified first time there's data */
1343 connection->objects = objects;
1344 connection->exit_on_disconnect = FALSE;
1345 connection->shareable = FALSE;
1346 connection->route_peer_messages = FALSE;
1347 connection->disconnected_message_arrived = FALSE;
1349
1350#if defined(DBUS_ENABLE_CHECKS) || defined(DBUS_ENABLE_ASSERT)
1351 connection->generation = _dbus_current_generation;
1352#endif
1353
1354 _dbus_data_slot_list_init (&connection->slot_list);
1355
1356 connection->client_serial = 1;
1357
1358 connection->disconnect_message_link = disconnect_link;
1359
1360 CONNECTION_LOCK (connection);
1361
1362 if (!_dbus_transport_set_connection (transport, connection))
1363 {
1364 CONNECTION_UNLOCK (connection);
1365
1366 goto error;
1367 }
1368
1369 _dbus_transport_ref (transport);
1370
1371 CONNECTION_UNLOCK (connection);
1372
1373 _dbus_connection_trace_ref (connection, 0, 1, "new_for_transport");
1374 return connection;
1375
1376 error:
1377 if (disconnect_message != NULL)
1378 dbus_message_unref (disconnect_message);
1379
1380 if (disconnect_link != NULL)
1381 _dbus_list_free_link (disconnect_link);
1382
1383 if (connection != NULL)
1384 {
1387 _dbus_rmutex_free_at_location (&connection->mutex);
1391 dbus_free (connection);
1392 }
1393 if (pending_replies)
1394 _dbus_hash_table_unref (pending_replies);
1395
1396 if (watch_list)
1397 _dbus_watch_list_free (watch_list);
1398
1399 if (timeout_list)
1400 _dbus_timeout_list_free (timeout_list);
1401
1402 if (outgoing_counter)
1403 _dbus_counter_unref (outgoing_counter);
1404
1405 if (objects)
1406 _dbus_object_tree_unref (objects);
1407
1408 return NULL;
1409}
1410
1420{
1421 dbus_int32_t old_refcount;
1422
1423 _dbus_assert (connection != NULL);
1424 _dbus_assert (connection->generation == _dbus_current_generation);
1425
1426 HAVE_LOCK_CHECK (connection);
1427
1428 old_refcount = _dbus_atomic_inc (&connection->refcount);
1429 _dbus_connection_trace_ref (connection, old_refcount, old_refcount + 1,
1430 "ref_unlocked");
1431
1432 return connection;
1433}
1434
1441void
1443{
1444 dbus_int32_t old_refcount;
1445
1446 HAVE_LOCK_CHECK (connection);
1447
1448 _dbus_assert (connection != NULL);
1449
1450 old_refcount = _dbus_atomic_dec (&connection->refcount);
1451
1452 _dbus_connection_trace_ref (connection, old_refcount, old_refcount - 1,
1453 "unref_unlocked");
1454
1455 if (old_refcount == 1)
1456 _dbus_connection_last_unref (connection);
1457}
1458
1459static dbus_uint32_t
1460_dbus_connection_get_next_client_serial (DBusConnection *connection)
1461{
1462 dbus_uint32_t serial;
1463
1464 serial = connection->client_serial++;
1465
1466 if (connection->client_serial == 0)
1467 connection->client_serial = 1;
1468
1469 return serial;
1470}
1471
1487 unsigned int condition,
1488 void *data)
1489{
1490 DBusConnection *connection;
1491 dbus_bool_t retval;
1492 DBusDispatchStatus status;
1493
1494 connection = data;
1495
1496 _dbus_verbose ("start\n");
1497
1498 CONNECTION_LOCK (connection);
1499
1500 if (!_dbus_connection_acquire_io_path (connection, 1))
1501 {
1502 /* another thread is handling the message */
1503 CONNECTION_UNLOCK (connection);
1504 return TRUE;
1505 }
1506
1507 HAVE_LOCK_CHECK (connection);
1508 retval = _dbus_transport_handle_watch (connection->transport,
1509 watch, condition);
1510
1511 _dbus_connection_release_io_path (connection);
1512
1513 HAVE_LOCK_CHECK (connection);
1514
1515 _dbus_verbose ("middle\n");
1516
1517 status = _dbus_connection_get_dispatch_status_unlocked (connection);
1518
1519 /* this calls out to user code */
1520 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
1521
1522 _dbus_verbose ("end\n");
1523
1524 return retval;
1525}
1526
1527/* Protected by _DBUS_LOCK (shared_connections) */
1528static DBusHashTable *shared_connections = NULL;
1529static DBusList *shared_connections_no_guid = NULL;
1530
1531static void
1532close_connection_on_shutdown (DBusConnection *connection)
1533{
1534 DBusMessage *message;
1535
1536 dbus_connection_ref (connection);
1538
1539 /* Churn through to the Disconnected message */
1540 while ((message = dbus_connection_pop_message (connection)))
1541 {
1542 dbus_message_unref (message);
1543 }
1544 dbus_connection_unref (connection);
1545}
1546
1547static void
1548shared_connections_shutdown (void *data)
1549{
1550 int n_entries;
1551
1552 if (!_DBUS_LOCK (shared_connections))
1553 {
1554 /* We'd have initialized locks before adding anything, so there
1555 * can't be anything there. */
1556 return;
1557 }
1558
1559 /* This is a little bit unpleasant... better ideas? */
1560 while ((n_entries = _dbus_hash_table_get_n_entries (shared_connections)) > 0)
1561 {
1562 DBusConnection *connection;
1563 DBusHashIter iter;
1564
1565 _dbus_hash_iter_init (shared_connections, &iter);
1566 _dbus_hash_iter_next (&iter);
1567
1568 connection = _dbus_hash_iter_get_value (&iter);
1569
1570 _DBUS_UNLOCK (shared_connections);
1571 close_connection_on_shutdown (connection);
1572 if (!_DBUS_LOCK (shared_connections))
1573 _dbus_assert_not_reached ("global locks were already initialized");
1574
1575 /* The connection should now be dead and not in our hash ... */
1576 _dbus_assert (_dbus_hash_table_get_n_entries (shared_connections) < n_entries);
1577 }
1578
1579 _dbus_assert (_dbus_hash_table_get_n_entries (shared_connections) == 0);
1580
1581 _dbus_hash_table_unref (shared_connections);
1582 shared_connections = NULL;
1583
1584 if (shared_connections_no_guid != NULL)
1585 {
1586 DBusConnection *connection;
1587 connection = _dbus_list_pop_first (&shared_connections_no_guid);
1588 while (connection != NULL)
1589 {
1590 _DBUS_UNLOCK (shared_connections);
1591 close_connection_on_shutdown (connection);
1592 if (!_DBUS_LOCK (shared_connections))
1593 _dbus_assert_not_reached ("global locks were already initialized");
1594 connection = _dbus_list_pop_first (&shared_connections_no_guid);
1595 }
1596 }
1597
1598 shared_connections_no_guid = NULL;
1599
1600 _DBUS_UNLOCK (shared_connections);
1601}
1602
1603static dbus_bool_t
1604connection_lookup_shared (DBusAddressEntry *entry,
1605 DBusConnection **result)
1606{
1607 _dbus_verbose ("checking for existing connection\n");
1608
1609 *result = NULL;
1610
1611 if (!_DBUS_LOCK (shared_connections))
1612 {
1613 /* If it was shared, we'd have initialized global locks when we put
1614 * it in shared_connections. */
1615 return FALSE;
1616 }
1617
1618 if (shared_connections == NULL)
1619 {
1620 _dbus_verbose ("creating shared_connections hash table\n");
1621
1622 shared_connections = _dbus_hash_table_new (DBUS_HASH_STRING,
1623 dbus_free,
1624 NULL);
1625 if (shared_connections == NULL)
1626 {
1627 _DBUS_UNLOCK (shared_connections);
1628 return FALSE;
1629 }
1630
1631 if (!_dbus_register_shutdown_func (shared_connections_shutdown, NULL))
1632 {
1633 _dbus_hash_table_unref (shared_connections);
1634 shared_connections = NULL;
1635 _DBUS_UNLOCK (shared_connections);
1636 return FALSE;
1637 }
1638
1639 _dbus_verbose (" successfully created shared_connections\n");
1640
1641 _DBUS_UNLOCK (shared_connections);
1642 return TRUE; /* no point looking up in the hash we just made */
1643 }
1644 else
1645 {
1646 const char *guid;
1647
1648 guid = dbus_address_entry_get_value (entry, "guid");
1649
1650 if (guid != NULL)
1651 {
1652 DBusConnection *connection;
1653
1654 connection = _dbus_hash_table_lookup_string (shared_connections,
1655 guid);
1656
1657 if (connection)
1658 {
1659 /* The DBusConnection can't be finalized without taking
1660 * the shared_connections lock to remove it from the
1661 * hash. So it's safe to ref the connection here.
1662 * However, it may be disconnected if the Disconnected
1663 * message hasn't been processed yet, in which case we
1664 * want to pretend it isn't in the hash and avoid
1665 * returning it.
1666 *
1667 * The idea is to avoid ever returning a disconnected connection
1668 * from dbus_connection_open(). We could just synchronously
1669 * drop our shared ref to the connection on connection disconnect,
1670 * and then assert here that the connection is connected, but
1671 * that causes reentrancy headaches.
1672 */
1673 CONNECTION_LOCK (connection);
1674 if (_dbus_connection_get_is_connected_unlocked (connection))
1675 {
1676 _dbus_connection_ref_unlocked (connection);
1677 *result = connection;
1678 _dbus_verbose ("looked up existing connection to server guid %s\n",
1679 guid);
1680 }
1681 else
1682 {
1683 _dbus_verbose ("looked up existing connection to server guid %s but it was disconnected so ignoring it\n",
1684 guid);
1685 }
1686 CONNECTION_UNLOCK (connection);
1687 }
1688 }
1689
1690 _DBUS_UNLOCK (shared_connections);
1691 return TRUE;
1692 }
1693}
1694
1695static dbus_bool_t
1696connection_record_shared_unlocked (DBusConnection *connection,
1697 const char *guid)
1698{
1699 char *guid_key;
1700 char *guid_in_connection;
1701
1702 HAVE_LOCK_CHECK (connection);
1703 _dbus_assert (connection->server_guid == NULL);
1704 _dbus_assert (connection->shareable);
1705
1706 /* get a hard ref on this connection, even if
1707 * we won't in fact store it in the hash, we still
1708 * need to hold a ref on it until it's disconnected.
1709 */
1710 _dbus_connection_ref_unlocked (connection);
1711
1712 if (guid == NULL)
1713 {
1714 if (!_DBUS_LOCK (shared_connections))
1715 return FALSE;
1716
1717 if (!_dbus_list_prepend (&shared_connections_no_guid, connection))
1718 {
1719 _DBUS_UNLOCK (shared_connections);
1720 return FALSE;
1721 }
1722
1723 _DBUS_UNLOCK (shared_connections);
1724 return TRUE; /* don't store in the hash */
1725 }
1726
1727 /* A separate copy of the key is required in the hash table, because
1728 * we don't have a lock on the connection when we are doing a hash
1729 * lookup.
1730 */
1731
1732 guid_key = _dbus_strdup (guid);
1733 if (guid_key == NULL)
1734 return FALSE;
1735
1736 guid_in_connection = _dbus_strdup (guid);
1737 if (guid_in_connection == NULL)
1738 {
1739 dbus_free (guid_key);
1740 return FALSE;
1741 }
1742
1743 if (!_DBUS_LOCK (shared_connections))
1744 {
1745 dbus_free (guid_in_connection);
1746 dbus_free (guid_key);
1747 return FALSE;
1748 }
1749
1750 _dbus_assert (shared_connections != NULL);
1751
1752 if (!_dbus_hash_table_insert_string (shared_connections,
1753 guid_key, connection))
1754 {
1755 dbus_free (guid_key);
1756 dbus_free (guid_in_connection);
1757 _DBUS_UNLOCK (shared_connections);
1758 return FALSE;
1759 }
1760
1761 connection->server_guid = guid_in_connection;
1762
1763 _dbus_verbose ("stored connection to %s to be shared\n",
1764 connection->server_guid);
1765
1766 _DBUS_UNLOCK (shared_connections);
1767
1768 _dbus_assert (connection->server_guid != NULL);
1769
1770 return TRUE;
1771}
1772
1773static void
1774connection_forget_shared_unlocked (DBusConnection *connection)
1775{
1776 HAVE_LOCK_CHECK (connection);
1777
1778 if (!connection->shareable)
1779 return;
1780
1781 if (!_DBUS_LOCK (shared_connections))
1782 {
1783 /* If it was shared, we'd have initialized global locks when we put
1784 * it in the table; so it can't be there. */
1785 return;
1786 }
1787
1788 if (connection->server_guid != NULL)
1789 {
1790 _dbus_verbose ("dropping connection to %s out of the shared table\n",
1791 connection->server_guid);
1792
1793 if (!_dbus_hash_table_remove_string (shared_connections,
1794 connection->server_guid))
1795 _dbus_assert_not_reached ("connection was not in the shared table");
1796
1797 dbus_free (connection->server_guid);
1798 connection->server_guid = NULL;
1799 }
1800 else
1801 {
1802 _dbus_list_remove (&shared_connections_no_guid, connection);
1803 }
1804
1805 _DBUS_UNLOCK (shared_connections);
1806
1807 /* remove our reference held on all shareable connections */
1809}
1810
1811static DBusConnection*
1812connection_try_from_address_entry (DBusAddressEntry *entry,
1813 DBusError *error)
1814{
1815 DBusTransport *transport;
1816 DBusConnection *connection;
1817
1818 transport = _dbus_transport_open (entry, error);
1819
1820 if (transport == NULL)
1821 {
1822 _DBUS_ASSERT_ERROR_IS_SET (error);
1823 return NULL;
1824 }
1825
1826 connection = _dbus_connection_new_for_transport (transport);
1827
1828 _dbus_transport_unref (transport);
1829
1830 if (connection == NULL)
1831 {
1832 _DBUS_SET_OOM (error);
1833 return NULL;
1834 }
1835
1836#ifndef DBUS_DISABLE_CHECKS
1837 _dbus_assert (!connection->have_connection_lock);
1838#endif
1839 return connection;
1840}
1841
1842/*
1843 * If the shared parameter is true, then any existing connection will
1844 * be used (and if a new connection is created, it will be available
1845 * for use by others). If the shared parameter is false, a new
1846 * connection will always be created, and the new connection will
1847 * never be returned to other callers.
1848 *
1849 * @param address the address
1850 * @param shared whether the connection is shared or private
1851 * @param error error return
1852 * @returns the connection or #NULL on error
1853 */
1854static DBusConnection*
1855_dbus_connection_open_internal (const char *address,
1856 dbus_bool_t shared,
1857 DBusError *error)
1858{
1859 DBusConnection *connection;
1860 DBusAddressEntry **entries;
1861 DBusError tmp_error = DBUS_ERROR_INIT;
1862 DBusError first_error = DBUS_ERROR_INIT;
1863 int len, i;
1864
1865 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1866
1867 _dbus_verbose ("opening %s connection to: %s\n",
1868 shared ? "shared" : "private", address);
1869
1870 if (!dbus_parse_address (address, &entries, &len, error))
1871 return NULL;
1872
1873 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1874
1875 connection = NULL;
1876
1877 for (i = 0; i < len; i++)
1878 {
1879 if (shared)
1880 {
1881 if (!connection_lookup_shared (entries[i], &connection))
1882 _DBUS_SET_OOM (&tmp_error);
1883 }
1884
1885 if (connection == NULL)
1886 {
1887 connection = connection_try_from_address_entry (entries[i],
1888 &tmp_error);
1889
1890 if (connection != NULL && shared)
1891 {
1892 const char *guid;
1893
1894 connection->shareable = TRUE;
1895
1896 /* guid may be NULL */
1897 guid = dbus_address_entry_get_value (entries[i], "guid");
1898
1899 CONNECTION_LOCK (connection);
1900
1901 if (!connection_record_shared_unlocked (connection, guid))
1902 {
1903 _DBUS_SET_OOM (&tmp_error);
1904 _dbus_connection_close_possibly_shared_and_unlock (connection);
1905 dbus_connection_unref (connection);
1906 connection = NULL;
1907 }
1908 else
1909 CONNECTION_UNLOCK (connection);
1910 }
1911 }
1912
1913 if (connection)
1914 break;
1915
1916 _DBUS_ASSERT_ERROR_IS_SET (&tmp_error);
1917
1918 if (i == 0)
1919 dbus_move_error (&tmp_error, &first_error);
1920 else
1921 dbus_error_free (&tmp_error);
1922 }
1923
1924 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1925 _DBUS_ASSERT_ERROR_IS_CLEAR (&tmp_error);
1926
1927 if (connection == NULL)
1928 {
1929 _DBUS_ASSERT_ERROR_IS_SET (&first_error);
1930 dbus_move_error (&first_error, error);
1931 }
1932 else
1933 dbus_error_free (&first_error);
1934
1935 dbus_address_entries_free (entries);
1936 return connection;
1937}
1938
1947void
1949{
1950 _dbus_assert (connection != NULL);
1951 _dbus_assert (connection->generation == _dbus_current_generation);
1952
1953 CONNECTION_LOCK (connection);
1954 _dbus_connection_close_possibly_shared_and_unlock (connection);
1955}
1956
1958_dbus_connection_preallocate_send_unlocked (DBusConnection *connection)
1959{
1960 DBusPreallocatedSend *preallocated;
1961
1962 HAVE_LOCK_CHECK (connection);
1963
1964 _dbus_assert (connection != NULL);
1965
1966 preallocated = dbus_new (DBusPreallocatedSend, 1);
1967 if (preallocated == NULL)
1968 return NULL;
1969
1970 preallocated->queue_link = _dbus_list_alloc_link (NULL);
1971 if (preallocated->queue_link == NULL)
1972 goto failed_0;
1973
1974 preallocated->counter_link = _dbus_list_alloc_link (connection->outgoing_counter);
1975 if (preallocated->counter_link == NULL)
1976 goto failed_1;
1977
1978 _dbus_counter_ref (preallocated->counter_link->data);
1979
1980 preallocated->connection = connection;
1981
1982 return preallocated;
1983
1984 failed_1:
1985 _dbus_list_free_link (preallocated->queue_link);
1986 failed_0:
1987 dbus_free (preallocated);
1988
1989 return NULL;
1990}
1991
1992/* Called with lock held, does not update dispatch status */
1993static void
1994_dbus_connection_send_preallocated_unlocked_no_update (DBusConnection *connection,
1995 DBusPreallocatedSend *preallocated,
1996 DBusMessage *message,
1997 dbus_uint32_t *client_serial)
1998{
1999 dbus_uint32_t serial;
2000
2001 preallocated->queue_link->data = message;
2003 preallocated->queue_link);
2004
2005 /* It's OK that we'll never call the notify function, because for the
2006 * outgoing limit, there isn't one */
2008 preallocated->counter_link);
2009
2010 dbus_free (preallocated);
2011 preallocated = NULL;
2012
2013 dbus_message_ref (message);
2014
2015 connection->n_outgoing += 1;
2016
2017 _dbus_verbose ("Message %p (%s %s %s %s '%s') for %s added to outgoing queue %p, %d pending to send\n",
2018 message,
2020 dbus_message_get_path (message) ?
2021 dbus_message_get_path (message) :
2022 "no path",
2023 dbus_message_get_interface (message) ?
2024 dbus_message_get_interface (message) :
2025 "no interface",
2026 dbus_message_get_member (message) ?
2027 dbus_message_get_member (message) :
2028 "no member",
2032 "null",
2033 connection,
2034 connection->n_outgoing);
2035
2036 if (dbus_message_get_serial (message) == 0)
2037 {
2038 serial = _dbus_connection_get_next_client_serial (connection);
2039 dbus_message_set_serial (message, serial);
2040 if (client_serial)
2041 *client_serial = serial;
2042 }
2043 else
2044 {
2045 if (client_serial)
2046 *client_serial = dbus_message_get_serial (message);
2047 }
2048
2049 _dbus_verbose ("Message %p serial is %u\n",
2050 message, dbus_message_get_serial (message));
2051
2052 dbus_message_lock (message);
2053
2054 /* Now we need to run an iteration to hopefully just write the messages
2055 * out immediately, and otherwise get them queued up
2056 */
2058 NULL,
2059 DBUS_ITERATION_DO_WRITING,
2060 -1);
2061
2062 /* If stuff is still queued up, be sure we wake up the main loop */
2063 if (connection->n_outgoing > 0)
2064 _dbus_connection_wakeup_mainloop (connection);
2065}
2066
2067static void
2068_dbus_connection_send_preallocated_and_unlock (DBusConnection *connection,
2069 DBusPreallocatedSend *preallocated,
2070 DBusMessage *message,
2071 dbus_uint32_t *client_serial)
2072{
2073 DBusDispatchStatus status;
2074
2075 HAVE_LOCK_CHECK (connection);
2076
2077 _dbus_connection_send_preallocated_unlocked_no_update (connection,
2078 preallocated,
2079 message, client_serial);
2080
2081 _dbus_verbose ("middle\n");
2082 status = _dbus_connection_get_dispatch_status_unlocked (connection);
2083
2084 /* this calls out to user code */
2085 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
2086}
2087
2099 DBusMessage *message,
2100 dbus_uint32_t *client_serial)
2101{
2102 DBusPreallocatedSend *preallocated;
2103
2104 _dbus_assert (connection != NULL);
2105 _dbus_assert (message != NULL);
2106
2107 preallocated = _dbus_connection_preallocate_send_unlocked (connection);
2108 if (preallocated == NULL)
2109 {
2110 CONNECTION_UNLOCK (connection);
2111 return FALSE;
2112 }
2113
2114 _dbus_connection_send_preallocated_and_unlock (connection,
2115 preallocated,
2116 message,
2117 client_serial);
2118 return TRUE;
2119}
2120
2145void
2147{
2148 dbus_int32_t refcount;
2149
2150 CONNECTION_LOCK (connection);
2151
2152 refcount = _dbus_atomic_get (&connection->refcount);
2153 /* The caller should have at least one ref */
2154 _dbus_assert (refcount >= 1);
2155
2156 if (refcount == 1)
2157 _dbus_connection_close_possibly_shared_and_unlock (connection);
2158 else
2159 CONNECTION_UNLOCK (connection);
2160}
2161
2162
2172static void
2173_dbus_memory_pause_based_on_timeout (int timeout_milliseconds)
2174{
2175 if (timeout_milliseconds == -1)
2177 else if (timeout_milliseconds < 100)
2178 ; /* just busy loop */
2179 else if (timeout_milliseconds <= 1000)
2180 _dbus_sleep_milliseconds (timeout_milliseconds / 3);
2181 else
2183}
2184
2185static DBusMessage *
2186generate_local_error_message (dbus_uint32_t serial,
2187 const char *error_name,
2188 const char *error_msg)
2189{
2190 DBusMessage *message;
2192 if (!message)
2193 goto out;
2194
2195 if (!dbus_message_set_error_name (message, error_name))
2196 {
2197 dbus_message_unref (message);
2198 message = NULL;
2199 goto out;
2200 }
2201
2202 dbus_message_set_no_reply (message, TRUE);
2203
2204 if (!dbus_message_set_reply_serial (message,
2205 serial))
2206 {
2207 dbus_message_unref (message);
2208 message = NULL;
2209 goto out;
2210 }
2211
2212 if (error_msg != NULL)
2213 {
2214 DBusMessageIter iter;
2215
2216 dbus_message_iter_init_append (message, &iter);
2219 &error_msg))
2220 {
2221 dbus_message_unref (message);
2222 message = NULL;
2223 goto out;
2224 }
2225 }
2226
2227 out:
2228 return message;
2229}
2230
2231/*
2232 * Peek the incoming queue to see if we got reply for a specific serial
2233 */
2234static dbus_bool_t
2235_dbus_connection_peek_for_reply_unlocked (DBusConnection *connection,
2236 dbus_uint32_t client_serial)
2237{
2238 DBusList *link;
2239 HAVE_LOCK_CHECK (connection);
2240
2241 link = _dbus_list_get_first_link (&connection->incoming_messages);
2242
2243 while (link != NULL)
2244 {
2245 DBusMessage *reply = link->data;
2246
2247 if (dbus_message_get_reply_serial (reply) == client_serial)
2248 {
2249 _dbus_verbose ("%s reply to %d found in queue\n", _DBUS_FUNCTION_NAME, client_serial);
2250 return TRUE;
2251 }
2252 link = _dbus_list_get_next_link (&connection->incoming_messages, link);
2253 }
2254
2255 return FALSE;
2256}
2257
2258/* This is slightly strange since we can pop a message here without
2259 * the dispatch lock.
2260 */
2261static DBusMessage*
2262check_for_reply_unlocked (DBusConnection *connection,
2263 dbus_uint32_t client_serial)
2264{
2265 DBusList *link;
2266
2267 HAVE_LOCK_CHECK (connection);
2268
2269 link = _dbus_list_get_first_link (&connection->incoming_messages);
2270
2271 while (link != NULL)
2272 {
2273 DBusMessage *reply = link->data;
2274
2275 if (dbus_message_get_reply_serial (reply) == client_serial)
2276 {
2277 _dbus_list_remove_link (&connection->incoming_messages, link);
2278 connection->n_incoming -= 1;
2279 return reply;
2280 }
2281 link = _dbus_list_get_next_link (&connection->incoming_messages, link);
2282 }
2283
2284 return NULL;
2285}
2286
2287static void
2288connection_timeout_and_complete_all_pending_calls_unlocked (DBusConnection *connection)
2289{
2290 /* We can't iterate over the hash in the normal way since we'll be
2291 * dropping the lock for each item. So we restart the
2292 * iter each time as we drain the hash table.
2293 */
2294
2295 while (_dbus_hash_table_get_n_entries (connection->pending_replies) > 0)
2296 {
2297 DBusPendingCall *pending;
2298 DBusHashIter iter;
2299
2300 _dbus_hash_iter_init (connection->pending_replies, &iter);
2301 _dbus_hash_iter_next (&iter);
2302
2303 pending = _dbus_hash_iter_get_value (&iter);
2305
2307 connection);
2308
2314
2316 CONNECTION_LOCK (connection);
2317 }
2318 HAVE_LOCK_CHECK (connection);
2319}
2320
2321static void
2322complete_pending_call_and_unlock (DBusConnection *connection,
2323 DBusPendingCall *pending,
2324 DBusMessage *message)
2325{
2326 _dbus_pending_call_set_reply_unlocked (pending, message);
2327 _dbus_pending_call_ref_unlocked (pending); /* in case there's no app with a ref held */
2329 _dbus_connection_detach_pending_call_and_unlock (connection, pending);
2330
2331 /* Must be called unlocked since it invokes app callback */
2333 dbus_pending_call_unref (pending);
2334}
2335
2336static dbus_bool_t
2337check_for_reply_and_update_dispatch_unlocked (DBusConnection *connection,
2338 DBusPendingCall *pending)
2339{
2340 DBusMessage *reply;
2341 DBusDispatchStatus status;
2342
2343 reply = check_for_reply_unlocked (connection,
2345 if (reply != NULL)
2346 {
2347 _dbus_verbose ("checked for reply\n");
2348
2349 _dbus_verbose ("dbus_connection_send_with_reply_and_block(): got reply\n");
2350
2351 complete_pending_call_and_unlock (connection, pending, reply);
2352 dbus_message_unref (reply);
2353
2354 CONNECTION_LOCK (connection);
2355 status = _dbus_connection_get_dispatch_status_unlocked (connection);
2356 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
2357 dbus_pending_call_unref (pending);
2358
2359 return TRUE;
2360 }
2361
2362 return FALSE;
2363}
2364
2379void
2381{
2382 long start_tv_sec, start_tv_usec;
2383 long tv_sec, tv_usec;
2384 DBusDispatchStatus status;
2385 DBusConnection *connection;
2386 dbus_uint32_t client_serial;
2387 DBusTimeout *timeout;
2388 int timeout_milliseconds, elapsed_milliseconds;
2389
2390 _dbus_assert (pending != NULL);
2391
2392 if (dbus_pending_call_get_completed (pending))
2393 return;
2394
2395 dbus_pending_call_ref (pending); /* necessary because the call could be canceled */
2396
2397 connection = _dbus_pending_call_get_connection_and_lock (pending);
2398
2399 /* Flush message queue - note, can affect dispatch status */
2400 _dbus_connection_flush_unlocked (connection);
2401
2402 client_serial = _dbus_pending_call_get_reply_serial_unlocked (pending);
2403
2404 /* note that timeout_milliseconds is limited to a smallish value
2405 * in _dbus_pending_call_new() so overflows aren't possible
2406 * below
2407 */
2408 timeout = _dbus_pending_call_get_timeout_unlocked (pending);
2409 _dbus_get_monotonic_time (&start_tv_sec, &start_tv_usec);
2410 if (timeout)
2411 {
2412 timeout_milliseconds = dbus_timeout_get_interval (timeout);
2413
2414 _dbus_verbose ("dbus_connection_send_with_reply_and_block(): will block %d milliseconds for reply serial %u from %ld sec %ld usec\n",
2415 timeout_milliseconds,
2416 client_serial,
2417 start_tv_sec, start_tv_usec);
2418 }
2419 else
2420 {
2421 timeout_milliseconds = -1;
2422
2423 _dbus_verbose ("dbus_connection_send_with_reply_and_block(): will block for reply serial %u\n", client_serial);
2424 }
2425
2426 /* check to see if we already got the data off the socket */
2427 /* from another blocked pending call */
2428 if (check_for_reply_and_update_dispatch_unlocked (connection, pending))
2429 return;
2430
2431 /* Now we wait... */
2432 /* always block at least once as we know we don't have the reply yet */
2434 pending,
2435 DBUS_ITERATION_DO_READING |
2436 DBUS_ITERATION_BLOCK,
2437 timeout_milliseconds);
2438
2439 recheck_status:
2440
2441 _dbus_verbose ("top of recheck\n");
2442
2443 HAVE_LOCK_CHECK (connection);
2444
2445 /* queue messages and get status */
2446
2447 status = _dbus_connection_get_dispatch_status_unlocked (connection);
2448
2449 /* the get_completed() is in case a dispatch() while we were blocking
2450 * got the reply instead of us.
2451 */
2453 {
2454 _dbus_verbose ("Pending call completed by dispatch\n");
2455 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
2456 dbus_pending_call_unref (pending);
2457 return;
2458 }
2459
2460 if (status == DBUS_DISPATCH_DATA_REMAINS)
2461 {
2462 if (check_for_reply_and_update_dispatch_unlocked (connection, pending))
2463 return;
2464 }
2465
2466 _dbus_get_monotonic_time (&tv_sec, &tv_usec);
2467 elapsed_milliseconds = (tv_sec - start_tv_sec) * 1000 +
2468 (tv_usec - start_tv_usec) / 1000;
2469
2470 if (!_dbus_connection_get_is_connected_unlocked (connection))
2471 {
2472 DBusMessage *error_msg;
2473
2474 error_msg = generate_local_error_message (client_serial,
2476 "Connection was disconnected before a reply was received");
2477
2478 /* on OOM error_msg is set to NULL */
2479 complete_pending_call_and_unlock (connection, pending, error_msg);
2480 if (error_msg != NULL)
2481 dbus_message_unref (error_msg);
2482 dbus_pending_call_unref (pending);
2483 return;
2484 }
2485 else if (connection->disconnect_message_link == NULL)
2486 _dbus_verbose ("dbus_connection_send_with_reply_and_block(): disconnected\n");
2487 else if (timeout == NULL)
2488 {
2489 if (status == DBUS_DISPATCH_NEED_MEMORY)
2490 {
2491 /* Try sleeping a bit, as we aren't sure we need to block for reading,
2492 * we may already have a reply in the buffer and just can't process
2493 * it.
2494 */
2495 _dbus_verbose ("dbus_connection_send_with_reply_and_block() waiting for more memory\n");
2496
2497 _dbus_memory_pause_based_on_timeout (timeout_milliseconds - elapsed_milliseconds);
2498 }
2499 else
2500 {
2501 /* block again, we don't have the reply buffered yet. */
2503 pending,
2504 DBUS_ITERATION_DO_READING |
2505 DBUS_ITERATION_BLOCK,
2506 timeout_milliseconds - elapsed_milliseconds);
2507 }
2508
2509 goto recheck_status;
2510 }
2511 else if (tv_sec < start_tv_sec)
2512 _dbus_verbose ("dbus_connection_send_with_reply_and_block(): clock set backward\n");
2513 else if (elapsed_milliseconds < timeout_milliseconds)
2514 {
2515 _dbus_verbose ("dbus_connection_send_with_reply_and_block(): %d milliseconds remain\n", timeout_milliseconds - elapsed_milliseconds);
2516
2517 if (status == DBUS_DISPATCH_NEED_MEMORY)
2518 {
2519 /* Try sleeping a bit, as we aren't sure we need to block for reading,
2520 * we may already have a reply in the buffer and just can't process
2521 * it.
2522 */
2523 _dbus_verbose ("dbus_connection_send_with_reply_and_block() waiting for more memory\n");
2524
2525 _dbus_memory_pause_based_on_timeout (timeout_milliseconds - elapsed_milliseconds);
2526 }
2527 else
2528 {
2529 /* block again, we don't have the reply buffered yet. */
2531 pending,
2532 DBUS_ITERATION_DO_READING |
2533 DBUS_ITERATION_BLOCK,
2534 timeout_milliseconds - elapsed_milliseconds);
2535 }
2536
2537 goto recheck_status;
2538 }
2539
2540 _dbus_verbose ("dbus_connection_send_with_reply_and_block(): Waited %d milliseconds and got no reply\n",
2541 elapsed_milliseconds);
2542
2544
2545 /* unlock and call user code */
2546 complete_pending_call_and_unlock (connection, pending, NULL);
2547
2548 /* update user code on dispatch status */
2549 CONNECTION_LOCK (connection);
2550 status = _dbus_connection_get_dispatch_status_unlocked (connection);
2551 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
2552 dbus_pending_call_unref (pending);
2553}
2554
2560int
2562{
2564}
2565
2573void
2575 DBusPendingFdsChangeFunction callback,
2576 void *data)
2577{
2579 callback, data);
2580}
2581
2619dbus_connection_open (const char *address,
2620 DBusError *error)
2621{
2622 DBusConnection *connection;
2623
2624 _dbus_return_val_if_fail (address != NULL, NULL);
2625 _dbus_return_val_if_error_is_set (error, NULL);
2626
2627 connection = _dbus_connection_open_internal (address,
2628 TRUE,
2629 error);
2630
2631 return connection;
2632}
2633
2662dbus_connection_open_private (const char *address,
2663 DBusError *error)
2664{
2665 DBusConnection *connection;
2666
2667 _dbus_return_val_if_fail (address != NULL, NULL);
2668 _dbus_return_val_if_error_is_set (error, NULL);
2669
2670 connection = _dbus_connection_open_internal (address,
2671 FALSE,
2672 error);
2673
2674 return connection;
2675}
2676
2685{
2686 dbus_int32_t old_refcount;
2687
2688 _dbus_return_val_if_fail (connection != NULL, NULL);
2689 _dbus_return_val_if_fail (connection->generation == _dbus_current_generation, NULL);
2690 old_refcount = _dbus_atomic_inc (&connection->refcount);
2691 _dbus_connection_trace_ref (connection, old_refcount, old_refcount + 1,
2692 "ref");
2693
2694 return connection;
2695}
2696
2697static void
2698free_outgoing_message (void *element,
2699 void *data)
2700{
2701 DBusMessage *message = element;
2702 DBusConnection *connection = data;
2703
2704 _dbus_message_remove_counter (message, connection->outgoing_counter);
2705 dbus_message_unref (message);
2706}
2707
2708/* This is run without the mutex held, but after the last reference
2709 * to the connection has been dropped we should have no thread-related
2710 * problems
2711 */
2712static void
2713_dbus_connection_last_unref (DBusConnection *connection)
2714{
2715 DBusList *link;
2716
2717 _dbus_verbose ("Finalizing connection %p\n", connection);
2718
2719 _dbus_assert (_dbus_atomic_get (&connection->refcount) == 0);
2720
2721 /* You have to disconnect the connection before unref:ing it. Otherwise
2722 * you won't get the disconnected message.
2723 */
2725 _dbus_assert (connection->server_guid == NULL);
2726
2727 /* ---- We're going to call various application callbacks here, hope it doesn't break anything... */
2729
2734
2735 _dbus_watch_list_free (connection->watches);
2736 connection->watches = NULL;
2737
2738 _dbus_timeout_list_free (connection->timeouts);
2739 connection->timeouts = NULL;
2740
2741 _dbus_data_slot_list_free (&connection->slot_list);
2742
2743 link = _dbus_list_get_first_link (&connection->filter_list);
2744 while (link != NULL)
2745 {
2746 DBusMessageFilter *filter = link->data;
2747 DBusList *next = _dbus_list_get_next_link (&connection->filter_list, link);
2748
2749 filter->function = NULL;
2750 _dbus_message_filter_unref (filter); /* calls app callback */
2751 link->data = NULL;
2752
2753 link = next;
2754 }
2755 _dbus_list_clear (&connection->filter_list);
2756
2757 /* ---- Done with stuff that invokes application callbacks */
2758
2759 _dbus_object_tree_unref (connection->objects);
2760
2762 connection->pending_replies = NULL;
2763
2765 free_outgoing_message,
2766 connection);
2767 _dbus_list_clear (&connection->outgoing_messages);
2768
2771 NULL);
2772 _dbus_list_clear (&connection->incoming_messages);
2773
2775
2776 _dbus_transport_unref (connection->transport);
2777
2778 if (connection->disconnect_message_link)
2779 {
2780 DBusMessage *message = connection->disconnect_message_link->data;
2781 dbus_message_unref (message);
2783 }
2784
2787
2790
2792
2793 _dbus_rmutex_free_at_location (&connection->mutex);
2794
2795 dbus_free (connection);
2796}
2797
2817void
2819{
2820 dbus_int32_t old_refcount;
2821
2822 _dbus_return_if_fail (connection != NULL);
2823 _dbus_return_if_fail (connection->generation == _dbus_current_generation);
2824
2825 old_refcount = _dbus_atomic_dec (&connection->refcount);
2826
2827 _dbus_connection_trace_ref (connection, old_refcount, old_refcount - 1,
2828 "unref");
2829
2830 if (old_refcount == 1)
2831 {
2832#ifndef DBUS_DISABLE_CHECKS
2834 {
2835 _dbus_warn_check_failed ("The last reference on a connection was dropped without closing the connection. This is a bug in an application. See dbus_connection_unref() documentation for details.\n%s",
2836 connection->shareable ?
2837 "Most likely, the application called unref() too many times and removed a reference belonging to libdbus, since this is a shared connection." :
2838 "Most likely, the application was supposed to call dbus_connection_close(), since this is a private connection.");
2839 return;
2840 }
2841#endif
2842 _dbus_connection_last_unref (connection);
2843 }
2844}
2845
2846/*
2847 * Note that the transport can disconnect itself (other end drops us)
2848 * and in that case this function never runs. So this function must
2849 * not do anything more than disconnect the transport and update the
2850 * dispatch status.
2851 *
2852 * If the transport self-disconnects, then we assume someone will
2853 * dispatch the connection to cause the dispatch status update.
2854 */
2855static void
2856_dbus_connection_close_possibly_shared_and_unlock (DBusConnection *connection)
2857{
2858 DBusDispatchStatus status;
2859
2860 HAVE_LOCK_CHECK (connection);
2861
2862 _dbus_verbose ("Disconnecting %p\n", connection);
2863
2864 /* We need to ref because update_dispatch_status_and_unlock will unref
2865 * the connection if it was shared and libdbus was the only remaining
2866 * refcount holder.
2867 */
2868 _dbus_connection_ref_unlocked (connection);
2869
2871
2872 /* This has the side effect of queuing the disconnect message link
2873 * (unless we don't have enough memory, possibly, so don't assert it).
2874 * After the disconnect message link is queued, dbus_bus_get/dbus_connection_open
2875 * should never again return the newly-disconnected connection.
2876 *
2877 * However, we only unref the shared connection and exit_on_disconnect when
2878 * the disconnect message reaches the head of the message queue,
2879 * NOT when it's first queued.
2880 */
2881 status = _dbus_connection_get_dispatch_status_unlocked (connection);
2882
2883 /* This calls out to user code */
2884 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
2885
2886 /* Could also call out to user code */
2887 dbus_connection_unref (connection);
2888}
2889
2932void
2934{
2935 _dbus_return_if_fail (connection != NULL);
2936 _dbus_return_if_fail (connection->generation == _dbus_current_generation);
2937
2938 CONNECTION_LOCK (connection);
2939
2940#ifndef DBUS_DISABLE_CHECKS
2941 if (connection->shareable)
2942 {
2943 CONNECTION_UNLOCK (connection);
2944
2945 _dbus_warn_check_failed ("Applications must not close shared connections - see dbus_connection_close() docs. This is a bug in the application.");
2946 return;
2947 }
2948#endif
2949
2950 _dbus_connection_close_possibly_shared_and_unlock (connection);
2951}
2952
2953static dbus_bool_t
2954_dbus_connection_get_is_connected_unlocked (DBusConnection *connection)
2955{
2956 HAVE_LOCK_CHECK (connection);
2957 return _dbus_transport_get_is_connected (connection->transport);
2958}
2959
2975{
2976 dbus_bool_t res;
2977
2978 _dbus_return_val_if_fail (connection != NULL, FALSE);
2979
2980 CONNECTION_LOCK (connection);
2981 res = _dbus_connection_get_is_connected_unlocked (connection);
2982 CONNECTION_UNLOCK (connection);
2983
2984 return res;
2985}
2986
2997{
2998 dbus_bool_t res;
2999
3000 _dbus_return_val_if_fail (connection != NULL, FALSE);
3001
3002 CONNECTION_LOCK (connection);
3004 CONNECTION_UNLOCK (connection);
3005
3006 return res;
3007}
3008
3031{
3032 dbus_bool_t res;
3033
3034 _dbus_return_val_if_fail (connection != NULL, FALSE);
3035
3036 CONNECTION_LOCK (connection);
3037 res = _dbus_transport_get_is_anonymous (connection->transport);
3038 CONNECTION_UNLOCK (connection);
3039
3040 return res;
3041}
3042
3074char*
3076{
3077 char *id;
3078
3079 _dbus_return_val_if_fail (connection != NULL, NULL);
3080
3081 CONNECTION_LOCK (connection);
3083 CONNECTION_UNLOCK (connection);
3084
3085 return id;
3086}
3087
3107 int type)
3108{
3109 _dbus_return_val_if_fail (connection != NULL, FALSE);
3110
3111 if (!dbus_type_is_valid (type))
3112 return FALSE;
3113
3114 if (type != DBUS_TYPE_UNIX_FD)
3115 return TRUE;
3116
3117#ifdef HAVE_UNIX_FD_PASSING
3118 {
3119 dbus_bool_t b;
3120
3121 CONNECTION_LOCK(connection);
3123 CONNECTION_UNLOCK(connection);
3124
3125 return b;
3126 }
3127#endif
3128
3129 return FALSE;
3130}
3131
3145void
3147 dbus_bool_t exit_on_disconnect)
3148{
3149 _dbus_return_if_fail (connection != NULL);
3150
3151 CONNECTION_LOCK (connection);
3152 connection->exit_on_disconnect = exit_on_disconnect != FALSE;
3153 CONNECTION_UNLOCK (connection);
3154}
3155
3167{
3168 DBusPreallocatedSend *preallocated;
3169
3170 _dbus_return_val_if_fail (connection != NULL, NULL);
3171
3172 CONNECTION_LOCK (connection);
3173
3174 preallocated =
3175 _dbus_connection_preallocate_send_unlocked (connection);
3176
3177 CONNECTION_UNLOCK (connection);
3178
3179 return preallocated;
3180}
3181
3191void
3193 DBusPreallocatedSend *preallocated)
3194{
3195 _dbus_return_if_fail (connection != NULL);
3196 _dbus_return_if_fail (preallocated != NULL);
3197 _dbus_return_if_fail (connection == preallocated->connection);
3198
3199 _dbus_list_free_link (preallocated->queue_link);
3200 _dbus_counter_unref (preallocated->counter_link->data);
3201 _dbus_list_free_link (preallocated->counter_link);
3202 dbus_free (preallocated);
3203}
3204
3217void
3219 DBusPreallocatedSend *preallocated,
3220 DBusMessage *message,
3221 dbus_uint32_t *client_serial)
3222{
3223 _dbus_return_if_fail (connection != NULL);
3224 _dbus_return_if_fail (preallocated != NULL);
3225 _dbus_return_if_fail (message != NULL);
3226 _dbus_return_if_fail (preallocated->connection == connection);
3227 _dbus_return_if_fail (dbus_message_get_type (message) != DBUS_MESSAGE_TYPE_METHOD_CALL ||
3228 dbus_message_get_member (message) != NULL);
3229 _dbus_return_if_fail (dbus_message_get_type (message) != DBUS_MESSAGE_TYPE_SIGNAL ||
3230 (dbus_message_get_interface (message) != NULL &&
3231 dbus_message_get_member (message) != NULL));
3232
3233 CONNECTION_LOCK (connection);
3234
3235#ifdef HAVE_UNIX_FD_PASSING
3236
3237 if (!_dbus_transport_can_pass_unix_fd(connection->transport) &&
3238 message->n_unix_fds > 0)
3239 {
3240 /* Refuse to send fds on a connection that cannot handle
3241 them. Unfortunately we cannot return a proper error here, so
3242 the best we can is just return. */
3243 CONNECTION_UNLOCK (connection);
3244 return;
3245 }
3246
3247#endif
3248
3249 _dbus_connection_send_preallocated_and_unlock (connection,
3250 preallocated,
3251 message, client_serial);
3252}
3253
3254static dbus_bool_t
3255_dbus_connection_send_unlocked_no_update (DBusConnection *connection,
3256 DBusMessage *message,
3257 dbus_uint32_t *client_serial)
3258{
3259 DBusPreallocatedSend *preallocated;
3260
3261 _dbus_assert (connection != NULL);
3262 _dbus_assert (message != NULL);
3263
3264 preallocated = _dbus_connection_preallocate_send_unlocked (connection);
3265 if (preallocated == NULL)
3266 return FALSE;
3267
3268 _dbus_connection_send_preallocated_unlocked_no_update (connection,
3269 preallocated,
3270 message,
3271 client_serial);
3272 return TRUE;
3273}
3274
3304 DBusMessage *message,
3305 dbus_uint32_t *serial)
3306{
3307 _dbus_return_val_if_fail (connection != NULL, FALSE);
3308 _dbus_return_val_if_fail (message != NULL, FALSE);
3309
3310 CONNECTION_LOCK (connection);
3311
3312#ifdef HAVE_UNIX_FD_PASSING
3313
3314 if (!_dbus_transport_can_pass_unix_fd(connection->transport) &&
3315 message->n_unix_fds > 0)
3316 {
3317 /* Refuse to send fds on a connection that cannot handle
3318 them. Unfortunately we cannot return a proper error here, so
3319 the best we can is just return. */
3320 CONNECTION_UNLOCK (connection);
3321 return FALSE;
3322 }
3323
3324#endif
3325
3326 return _dbus_connection_send_and_unlock (connection,
3327 message,
3328 serial);
3329}
3330
3331static dbus_bool_t
3332reply_handler_timeout (void *data)
3333{
3334 DBusConnection *connection;
3335 DBusDispatchStatus status;
3336 DBusPendingCall *pending = data;
3337
3338 connection = _dbus_pending_call_get_connection_and_lock (pending);
3339 _dbus_connection_ref_unlocked (connection);
3340
3342 connection);
3346
3347 _dbus_verbose ("middle\n");
3348 status = _dbus_connection_get_dispatch_status_unlocked (connection);
3349
3350 /* Unlocks, and calls out to user code */
3351 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
3352 dbus_connection_unref (connection);
3353
3354 return TRUE;
3355}
3356
3401 DBusMessage *message,
3402 DBusPendingCall **pending_return,
3403 int timeout_milliseconds)
3404{
3405 DBusPendingCall *pending;
3406 dbus_int32_t serial = -1;
3407 DBusDispatchStatus status;
3408
3409 _dbus_return_val_if_fail (connection != NULL, FALSE);
3410 _dbus_return_val_if_fail (message != NULL, FALSE);
3411 _dbus_return_val_if_fail (timeout_milliseconds >= 0 || timeout_milliseconds == -1, FALSE);
3412
3413 if (pending_return)
3414 *pending_return = NULL;
3415
3416 CONNECTION_LOCK (connection);
3417
3418#ifdef HAVE_UNIX_FD_PASSING
3419
3420 if (!_dbus_transport_can_pass_unix_fd(connection->transport) &&
3421 message->n_unix_fds > 0)
3422 {
3423 /* Refuse to send fds on a connection that cannot handle
3424 them. Unfortunately we cannot return a proper error here, so
3425 the best we can do is return TRUE but leave *pending_return
3426 as NULL. */
3427 CONNECTION_UNLOCK (connection);
3428 return TRUE;
3429 }
3430
3431#endif
3432
3433 if (!_dbus_connection_get_is_connected_unlocked (connection))
3434 {
3435 CONNECTION_UNLOCK (connection);
3436
3437 return TRUE;
3438 }
3439
3440 pending = _dbus_pending_call_new_unlocked (connection,
3441 timeout_milliseconds,
3442 reply_handler_timeout);
3443
3444 if (pending == NULL)
3445 {
3446 CONNECTION_UNLOCK (connection);
3447 return FALSE;
3448 }
3449
3450 /* Assign a serial to the message */
3451 serial = dbus_message_get_serial (message);
3452 if (serial == 0)
3453 {
3454 serial = _dbus_connection_get_next_client_serial (connection);
3455 dbus_message_set_serial (message, serial);
3456 }
3457
3458 if (!_dbus_pending_call_set_timeout_error_unlocked (pending, message, serial))
3459 goto error;
3460
3461 /* Insert the serial in the pending replies hash;
3462 * hash takes a refcount on DBusPendingCall.
3463 * Also, add the timeout.
3464 */
3465 if (!_dbus_connection_attach_pending_call_unlocked (connection,
3466 pending))
3467 goto error;
3468
3469 if (!_dbus_connection_send_unlocked_no_update (connection, message, NULL))
3470 {
3471 _dbus_connection_detach_pending_call_and_unlock (connection,
3472 pending);
3473 goto error_unlocked;
3474 }
3475
3476 if (pending_return)
3477 *pending_return = pending; /* hand off refcount */
3478 else
3479 {
3480 _dbus_connection_detach_pending_call_unlocked (connection, pending);
3481 /* we still have a ref to the pending call in this case, we unref
3482 * after unlocking, below
3483 */
3484 }
3485
3486 status = _dbus_connection_get_dispatch_status_unlocked (connection);
3487
3488 /* this calls out to user code */
3489 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
3490
3491 if (pending_return == NULL)
3492 dbus_pending_call_unref (pending);
3493
3494 return TRUE;
3495
3496 error:
3497 CONNECTION_UNLOCK (connection);
3498 error_unlocked:
3499 dbus_pending_call_unref (pending);
3500 return FALSE;
3501}
3502
3537 DBusMessage *message,
3538 int timeout_milliseconds,
3539 DBusError *error)
3540{
3541 DBusMessage *reply;
3542 DBusPendingCall *pending;
3543
3544 _dbus_return_val_if_fail (connection != NULL, NULL);
3545 _dbus_return_val_if_fail (message != NULL, NULL);
3546 _dbus_return_val_if_fail (timeout_milliseconds >= 0 || timeout_milliseconds == -1, NULL);
3547 _dbus_return_val_if_error_is_set (error, NULL);
3548
3549#ifdef HAVE_UNIX_FD_PASSING
3550
3551 CONNECTION_LOCK (connection);
3552 if (!_dbus_transport_can_pass_unix_fd(connection->transport) &&
3553 message->n_unix_fds > 0)
3554 {
3555 CONNECTION_UNLOCK (connection);
3556 dbus_set_error(error, DBUS_ERROR_FAILED, "Cannot send file descriptors on this connection.");
3557 return NULL;
3558 }
3559 CONNECTION_UNLOCK (connection);
3560
3561#endif
3562
3563 if (!dbus_connection_send_with_reply (connection, message,
3564 &pending, timeout_milliseconds))
3565 {
3566 _DBUS_SET_OOM (error);
3567 return NULL;
3568 }
3569
3570 if (pending == NULL)
3571 {
3572 dbus_set_error (error, DBUS_ERROR_DISCONNECTED, "Connection is closed");
3573 return NULL;
3574 }
3575
3576 dbus_pending_call_block (pending);
3577
3578 reply = dbus_pending_call_steal_reply (pending);
3579 dbus_pending_call_unref (pending);
3580
3581 /* call_complete_and_unlock() called from pending_call_block() should
3582 * always fill this in.
3583 */
3584 _dbus_assert (reply != NULL);
3585
3586 if (dbus_set_error_from_message (error, reply))
3587 {
3588 dbus_message_unref (reply);
3589 return NULL;
3590 }
3591 else
3592 return reply;
3593}
3594
3603static DBusDispatchStatus
3604_dbus_connection_flush_unlocked (DBusConnection *connection)
3605{
3606 /* We have to specify DBUS_ITERATION_DO_READING here because
3607 * otherwise we could have two apps deadlock if they are both doing
3608 * a flush(), and the kernel buffers fill up. This could change the
3609 * dispatch status.
3610 */
3611 DBusDispatchStatus status;
3612
3613 HAVE_LOCK_CHECK (connection);
3614
3615 while (connection->n_outgoing > 0 &&
3616 _dbus_connection_get_is_connected_unlocked (connection))
3617 {
3618 _dbus_verbose ("doing iteration in\n");
3619 HAVE_LOCK_CHECK (connection);
3621 NULL,
3622 DBUS_ITERATION_DO_READING |
3623 DBUS_ITERATION_DO_WRITING |
3624 DBUS_ITERATION_BLOCK,
3625 -1);
3626 }
3627
3628 HAVE_LOCK_CHECK (connection);
3629 _dbus_verbose ("middle\n");
3630 status = _dbus_connection_get_dispatch_status_unlocked (connection);
3631
3632 HAVE_LOCK_CHECK (connection);
3633 return status;
3634}
3635
3641void
3643{
3644 /* We have to specify DBUS_ITERATION_DO_READING here because
3645 * otherwise we could have two apps deadlock if they are both doing
3646 * a flush(), and the kernel buffers fill up. This could change the
3647 * dispatch status.
3648 */
3649 DBusDispatchStatus status;
3650
3651 _dbus_return_if_fail (connection != NULL);
3652
3653 CONNECTION_LOCK (connection);
3654
3655 status = _dbus_connection_flush_unlocked (connection);
3656
3657 HAVE_LOCK_CHECK (connection);
3658 /* Unlocks and calls out to user code */
3659 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
3660
3661 _dbus_verbose ("end\n");
3662}
3663
3674static dbus_bool_t
3675_dbus_connection_read_write_dispatch (DBusConnection *connection,
3676 int timeout_milliseconds,
3677 dbus_bool_t dispatch)
3678{
3679 DBusDispatchStatus dstatus;
3680 dbus_bool_t progress_possible;
3681
3682 /* Need to grab a ref here in case we're a private connection and
3683 * the user drops the last ref in a handler we call; see bug
3684 * https://bugs.freedesktop.org/show_bug.cgi?id=15635
3685 */
3686 dbus_connection_ref (connection);
3687 dstatus = dbus_connection_get_dispatch_status (connection);
3688
3689 if (dispatch && dstatus == DBUS_DISPATCH_DATA_REMAINS)
3690 {
3691 _dbus_verbose ("doing dispatch\n");
3692 dbus_connection_dispatch (connection);
3693 CONNECTION_LOCK (connection);
3694 }
3695 else if (dstatus == DBUS_DISPATCH_NEED_MEMORY)
3696 {
3697 _dbus_verbose ("pausing for memory\n");
3698 _dbus_memory_pause_based_on_timeout (timeout_milliseconds);
3699 CONNECTION_LOCK (connection);
3700 }
3701 else
3702 {
3703 CONNECTION_LOCK (connection);
3704 if (_dbus_connection_get_is_connected_unlocked (connection))
3705 {
3706 _dbus_verbose ("doing iteration\n");
3708 NULL,
3709 DBUS_ITERATION_DO_READING |
3710 DBUS_ITERATION_DO_WRITING |
3711 DBUS_ITERATION_BLOCK,
3712 timeout_milliseconds);
3713 }
3714 }
3715
3716 HAVE_LOCK_CHECK (connection);
3717 /* If we can dispatch, we can make progress until the Disconnected message
3718 * has been processed; if we can only read/write, we can make progress
3719 * as long as the transport is open.
3720 */
3721 if (dispatch)
3722 progress_possible = connection->n_incoming != 0 ||
3723 connection->disconnect_message_link != NULL;
3724 else
3725 progress_possible = _dbus_connection_get_is_connected_unlocked (connection);
3726
3727 CONNECTION_UNLOCK (connection);
3728
3729 dbus_connection_unref (connection);
3730
3731 return progress_possible; /* TRUE if we can make more progress */
3732}
3733
3734
3771 int timeout_milliseconds)
3772{
3773 _dbus_return_val_if_fail (connection != NULL, FALSE);
3774 _dbus_return_val_if_fail (timeout_milliseconds >= 0 || timeout_milliseconds == -1, FALSE);
3775 return _dbus_connection_read_write_dispatch(connection, timeout_milliseconds, TRUE);
3776}
3777
3803 int timeout_milliseconds)
3804{
3805 _dbus_return_val_if_fail (connection != NULL, FALSE);
3806 _dbus_return_val_if_fail (timeout_milliseconds >= 0 || timeout_milliseconds == -1, FALSE);
3807 return _dbus_connection_read_write_dispatch(connection, timeout_milliseconds, FALSE);
3808}
3809
3810/* We need to call this anytime we pop the head of the queue, and then
3811 * update_dispatch_status_and_unlock needs to be called afterward
3812 * which will "process" the disconnected message and set
3813 * disconnected_message_processed.
3814 */
3815static void
3816check_disconnected_message_arrived_unlocked (DBusConnection *connection,
3817 DBusMessage *head_of_queue)
3818{
3819 HAVE_LOCK_CHECK (connection);
3820
3821 /* checking that the link is NULL is an optimization to avoid the is_signal call */
3822 if (connection->disconnect_message_link == NULL &&
3823 dbus_message_is_signal (head_of_queue,
3825 "Disconnected"))
3826 {
3827 connection->disconnected_message_arrived = TRUE;
3828 }
3829}
3830
3852{
3853 DBusDispatchStatus status;
3854 DBusMessage *message;
3855
3856 _dbus_return_val_if_fail (connection != NULL, NULL);
3857
3858 _dbus_verbose ("start\n");
3859
3860 /* this is called for the side effect that it queues
3861 * up any messages from the transport
3862 */
3863 status = dbus_connection_get_dispatch_status (connection);
3864 if (status != DBUS_DISPATCH_DATA_REMAINS)
3865 return NULL;
3866
3867 CONNECTION_LOCK (connection);
3868
3869 _dbus_connection_acquire_dispatch (connection);
3870
3871 /* While a message is outstanding, the dispatch lock is held */
3872 _dbus_assert (connection->message_borrowed == NULL);
3873
3874 connection->message_borrowed = _dbus_list_get_first (&connection->incoming_messages);
3875
3876 message = connection->message_borrowed;
3877
3878 check_disconnected_message_arrived_unlocked (connection, message);
3879
3880 /* Note that we KEEP the dispatch lock until the message is returned */
3881 if (message == NULL)
3882 _dbus_connection_release_dispatch (connection);
3883
3884 CONNECTION_UNLOCK (connection);
3885
3886 _dbus_message_trace_ref (message, -1, -1, "dbus_connection_borrow_message");
3887
3888 /* We don't update dispatch status until it's returned or stolen */
3889
3890 return message;
3891}
3892
3901void
3903 DBusMessage *message)
3904{
3905 DBusDispatchStatus status;
3906
3907 _dbus_return_if_fail (connection != NULL);
3908 _dbus_return_if_fail (message != NULL);
3909 _dbus_return_if_fail (message == connection->message_borrowed);
3910 _dbus_return_if_fail (connection->dispatch_acquired);
3911
3912 CONNECTION_LOCK (connection);
3913
3914 _dbus_assert (message == connection->message_borrowed);
3915
3916 connection->message_borrowed = NULL;
3917
3918 _dbus_connection_release_dispatch (connection);
3919
3920 status = _dbus_connection_get_dispatch_status_unlocked (connection);
3921 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
3922
3923 _dbus_message_trace_ref (message, -1, -1, "dbus_connection_return_message");
3924}
3925
3935void
3937 DBusMessage *message)
3938{
3939 DBusMessage *pop_message;
3940 DBusDispatchStatus status;
3941
3942 _dbus_return_if_fail (connection != NULL);
3943 _dbus_return_if_fail (message != NULL);
3944 _dbus_return_if_fail (message == connection->message_borrowed);
3945 _dbus_return_if_fail (connection->dispatch_acquired);
3946
3947 CONNECTION_LOCK (connection);
3948
3949 _dbus_assert (message == connection->message_borrowed);
3950
3951 pop_message = _dbus_list_pop_first (&connection->incoming_messages);
3952 _dbus_assert (message == pop_message);
3953 (void) pop_message; /* unused unless asserting */
3954
3955 connection->n_incoming -= 1;
3956
3957 _dbus_verbose ("Incoming message %p stolen from queue, %d incoming\n",
3958 message, connection->n_incoming);
3959
3960 connection->message_borrowed = NULL;
3961
3962 _dbus_connection_release_dispatch (connection);
3963
3964 status = _dbus_connection_get_dispatch_status_unlocked (connection);
3965 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
3966 _dbus_message_trace_ref (message, -1, -1,
3967 "dbus_connection_steal_borrowed_message");
3968}
3969
3970/* See dbus_connection_pop_message, but requires the caller to own
3971 * the lock before calling. May drop the lock while running.
3972 */
3973static DBusList*
3974_dbus_connection_pop_message_link_unlocked (DBusConnection *connection)
3975{
3976 HAVE_LOCK_CHECK (connection);
3977
3978 _dbus_assert (connection->message_borrowed == NULL);
3979
3980 if (connection->n_incoming > 0)
3981 {
3982 DBusList *link;
3983
3984 link = _dbus_list_pop_first_link (&connection->incoming_messages);
3985 connection->n_incoming -= 1;
3986
3987 _dbus_verbose ("Message %p (%s %s %s %s sig:'%s' serial:%u) removed from incoming queue %p, %d incoming\n",
3988 link->data,
3990 dbus_message_get_path (link->data) ?
3991 dbus_message_get_path (link->data) :
3992 "no path",
3995 "no interface",
3998 "no member",
4001 connection, connection->n_incoming);
4002
4003 _dbus_message_trace_ref (link->data, -1, -1,
4004 "_dbus_connection_pop_message_link_unlocked");
4005
4006 check_disconnected_message_arrived_unlocked (connection, link->data);
4007
4008 return link;
4009 }
4010 else
4011 return NULL;
4012}
4013
4014/* See dbus_connection_pop_message, but requires the caller to own
4015 * the lock before calling. May drop the lock while running.
4016 */
4017static DBusMessage*
4018_dbus_connection_pop_message_unlocked (DBusConnection *connection)
4019{
4020 DBusList *link;
4021
4022 HAVE_LOCK_CHECK (connection);
4023
4024 link = _dbus_connection_pop_message_link_unlocked (connection);
4025
4026 if (link != NULL)
4027 {
4028 DBusMessage *message;
4029
4030 message = link->data;
4031
4032 _dbus_list_free_link (link);
4033
4034 return message;
4035 }
4036 else
4037 return NULL;
4038}
4039
4040static void
4041_dbus_connection_putback_message_link_unlocked (DBusConnection *connection,
4042 DBusList *message_link)
4043{
4044 HAVE_LOCK_CHECK (connection);
4045
4046 _dbus_assert (message_link != NULL);
4047 /* You can't borrow a message while a link is outstanding */
4048 _dbus_assert (connection->message_borrowed == NULL);
4049 /* We had to have the dispatch lock across the pop/putback */
4050 _dbus_assert (connection->dispatch_acquired);
4051
4053 message_link);
4054 connection->n_incoming += 1;
4055
4056 _dbus_verbose ("Message %p (%s %s %s '%s') put back into queue %p, %d incoming\n",
4057 message_link->data,
4059 dbus_message_get_interface (message_link->data) ?
4060 dbus_message_get_interface (message_link->data) :
4061 "no interface",
4062 dbus_message_get_member (message_link->data) ?
4063 dbus_message_get_member (message_link->data) :
4064 "no member",
4065 dbus_message_get_signature (message_link->data),
4066 connection, connection->n_incoming);
4067
4068 _dbus_message_trace_ref (message_link->data, -1, -1,
4069 "_dbus_connection_putback_message_link_unlocked");
4070}
4071
4093{
4094 DBusMessage *message;
4095 DBusDispatchStatus status;
4096
4097 _dbus_verbose ("start\n");
4098
4099 /* this is called for the side effect that it queues
4100 * up any messages from the transport
4101 */
4102 status = dbus_connection_get_dispatch_status (connection);
4103 if (status != DBUS_DISPATCH_DATA_REMAINS)
4104 return NULL;
4105
4106 CONNECTION_LOCK (connection);
4107 _dbus_connection_acquire_dispatch (connection);
4108 HAVE_LOCK_CHECK (connection);
4109
4110 message = _dbus_connection_pop_message_unlocked (connection);
4111
4112 _dbus_verbose ("Returning popped message %p\n", message);
4113
4114 _dbus_connection_release_dispatch (connection);
4115
4116 status = _dbus_connection_get_dispatch_status_unlocked (connection);
4117 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
4118
4119 return message;
4120}
4121
4129static void
4130_dbus_connection_acquire_dispatch (DBusConnection *connection)
4131{
4132 HAVE_LOCK_CHECK (connection);
4133
4134 _dbus_connection_ref_unlocked (connection);
4135 CONNECTION_UNLOCK (connection);
4136
4137 _dbus_verbose ("locking dispatch_mutex\n");
4138 _dbus_cmutex_lock (connection->dispatch_mutex);
4139
4140 while (connection->dispatch_acquired)
4141 {
4142 _dbus_verbose ("waiting for dispatch to be acquirable\n");
4143 _dbus_condvar_wait (connection->dispatch_cond,
4144 connection->dispatch_mutex);
4145 }
4146
4147 _dbus_assert (!connection->dispatch_acquired);
4148
4149 connection->dispatch_acquired = TRUE;
4150
4151 _dbus_verbose ("unlocking dispatch_mutex\n");
4152 _dbus_cmutex_unlock (connection->dispatch_mutex);
4153
4154 CONNECTION_LOCK (connection);
4156}
4157
4165static void
4166_dbus_connection_release_dispatch (DBusConnection *connection)
4167{
4168 HAVE_LOCK_CHECK (connection);
4169
4170 _dbus_verbose ("locking dispatch_mutex\n");
4171 _dbus_cmutex_lock (connection->dispatch_mutex);
4172
4173 _dbus_assert (connection->dispatch_acquired);
4174
4175 connection->dispatch_acquired = FALSE;
4177
4178 _dbus_verbose ("unlocking dispatch_mutex\n");
4179 _dbus_cmutex_unlock (connection->dispatch_mutex);
4180}
4181
4182static void
4183_dbus_connection_failed_pop (DBusConnection *connection,
4184 DBusList *message_link)
4185{
4187 message_link);
4188 connection->n_incoming += 1;
4189}
4190
4191/* Note this may be called multiple times since we don't track whether we already did it */
4192static void
4193notify_disconnected_unlocked (DBusConnection *connection)
4194{
4195 HAVE_LOCK_CHECK (connection);
4196
4197 /* Set the weakref in dbus-bus.c to NULL, so nobody will get a disconnected
4198 * connection from dbus_bus_get(). We make the same guarantee for
4199 * dbus_connection_open() but in a different way since we don't want to
4200 * unref right here; we instead check for connectedness before returning
4201 * the connection from the hash.
4202 */
4204
4205 /* Dump the outgoing queue, we aren't going to be able to
4206 * send it now, and we'd like accessors like
4207 * dbus_connection_get_outgoing_size() to be accurate.
4208 */
4209 if (connection->n_outgoing > 0)
4210 {
4211 DBusList *link;
4212
4213 _dbus_verbose ("Dropping %d outgoing messages since we're disconnected\n",
4214 connection->n_outgoing);
4215
4216 while ((link = _dbus_list_get_last_link (&connection->outgoing_messages)))
4217 {
4218 _dbus_connection_message_sent_unlocked (connection, link->data);
4219 }
4220 }
4221}
4222
4223/* Note this may be called multiple times since we don't track whether we already did it */
4224static DBusDispatchStatus
4225notify_disconnected_and_dispatch_complete_unlocked (DBusConnection *connection)
4226{
4227 HAVE_LOCK_CHECK (connection);
4228
4229 if (connection->disconnect_message_link != NULL)
4230 {
4231 _dbus_verbose ("Sending disconnect message\n");
4232
4233 /* If we have pending calls, queue their timeouts - we want the Disconnected
4234 * to be the last message, after these timeouts.
4235 */
4236 connection_timeout_and_complete_all_pending_calls_unlocked (connection);
4237
4238 /* We haven't sent the disconnect message already,
4239 * and all real messages have been queued up.
4240 */
4242 connection->disconnect_message_link);
4243 connection->disconnect_message_link = NULL;
4244
4246 }
4247
4249}
4250
4251static DBusDispatchStatus
4252_dbus_connection_get_dispatch_status_unlocked (DBusConnection *connection)
4253{
4254 HAVE_LOCK_CHECK (connection);
4255
4256 if (connection->n_incoming > 0)
4258 else if (!_dbus_transport_queue_messages (connection->transport))
4260 else
4261 {
4262 DBusDispatchStatus status;
4263 dbus_bool_t is_connected;
4264
4265 status = _dbus_transport_get_dispatch_status (connection->transport);
4266 is_connected = _dbus_transport_get_is_connected (connection->transport);
4267
4268 _dbus_verbose ("dispatch status = %s is_connected = %d\n",
4269 DISPATCH_STATUS_NAME (status), is_connected);
4270
4271 if (!is_connected)
4272 {
4273 /* It's possible this would be better done by having an explicit
4274 * notification from _dbus_transport_disconnect() that would
4275 * synchronously do this, instead of waiting for the next dispatch
4276 * status check. However, probably not good to change until it causes
4277 * a problem.
4278 */
4279 notify_disconnected_unlocked (connection);
4280
4281 /* I'm not sure this is needed; the idea is that we want to
4282 * queue the Disconnected only after we've read all the
4283 * messages, but if we're disconnected maybe we are guaranteed
4284 * to have read them all ?
4285 */
4286 if (status == DBUS_DISPATCH_COMPLETE)
4287 status = notify_disconnected_and_dispatch_complete_unlocked (connection);
4288 }
4289
4290 if (status != DBUS_DISPATCH_COMPLETE)
4291 return status;
4292 else if (connection->n_incoming > 0)
4294 else
4296 }
4297}
4298
4299static void
4300_dbus_connection_update_dispatch_status_and_unlock (DBusConnection *connection,
4301 DBusDispatchStatus new_status)
4302{
4303 dbus_bool_t changed;
4305 void *data;
4306
4307 HAVE_LOCK_CHECK (connection);
4308
4309 _dbus_connection_ref_unlocked (connection);
4310
4311 changed = new_status != connection->last_dispatch_status;
4312
4313 connection->last_dispatch_status = new_status;
4314
4315 function = connection->dispatch_status_function;
4316 data = connection->dispatch_status_data;
4317
4318 if (connection->disconnected_message_arrived &&
4319 !connection->disconnected_message_processed)
4320 {
4322
4323 /* this does an unref, but we have a ref
4324 * so we should not run the finalizer here
4325 * inside the lock.
4326 */
4327 connection_forget_shared_unlocked (connection);
4328
4329 if (connection->exit_on_disconnect)
4330 {
4331 CONNECTION_UNLOCK (connection);
4332
4333 _dbus_verbose ("Exiting on Disconnected signal\n");
4334 _dbus_exit (1);
4335 _dbus_assert_not_reached ("Call to exit() returned");
4336 }
4337 }
4338
4339 /* We drop the lock */
4340 CONNECTION_UNLOCK (connection);
4341
4342 if (changed && function)
4343 {
4344 _dbus_verbose ("Notifying of change to dispatch status of %p now %d (%s)\n",
4345 connection, new_status,
4346 DISPATCH_STATUS_NAME (new_status));
4347 (* function) (connection, new_status, data);
4348 }
4349
4350 dbus_connection_unref (connection);
4351}
4352
4380{
4381 DBusDispatchStatus status;
4382
4383 _dbus_return_val_if_fail (connection != NULL, DBUS_DISPATCH_COMPLETE);
4384
4385 _dbus_verbose ("start\n");
4386
4387 CONNECTION_LOCK (connection);
4388
4389 status = _dbus_connection_get_dispatch_status_unlocked (connection);
4390
4391 CONNECTION_UNLOCK (connection);
4392
4393 return status;
4394}
4395
4399static DBusHandlerResult
4400_dbus_connection_peer_filter_unlocked_no_update (DBusConnection *connection,
4401 DBusMessage *message)
4402{
4403 dbus_bool_t sent = FALSE;
4404 DBusMessage *ret = NULL;
4405 DBusList *expire_link;
4406
4407 if (connection->route_peer_messages && dbus_message_get_destination (message) != NULL)
4408 {
4409 /* This means we're letting the bus route this message */
4411 }
4412
4414 {
4416 }
4417
4418 /* Preallocate a linked-list link, so that if we need to dispose of a
4419 * message, we can attach it to the expired list */
4420 expire_link = _dbus_list_alloc_link (NULL);
4421
4422 if (!expire_link)
4424
4425 if (dbus_message_is_method_call (message,
4427 "Ping"))
4428 {
4429 ret = dbus_message_new_method_return (message);
4430 if (ret == NULL)
4431 goto out;
4432
4433 sent = _dbus_connection_send_unlocked_no_update (connection, ret, NULL);
4434 }
4435 else if (dbus_message_is_method_call (message,
4437 "GetMachineId"))
4438 {
4439 DBusString uuid;
4440 DBusError error = DBUS_ERROR_INIT;
4441
4442 if (!_dbus_string_init (&uuid))
4443 goto out;
4444
4445 if (_dbus_get_local_machine_uuid_encoded (&uuid, &error))
4446 {
4447 const char *v_STRING;
4448
4449 ret = dbus_message_new_method_return (message);
4450
4451 if (ret == NULL)
4452 {
4453 _dbus_string_free (&uuid);
4454 goto out;
4455 }
4456
4457 v_STRING = _dbus_string_get_const_data (&uuid);
4458 if (dbus_message_append_args (ret,
4459 DBUS_TYPE_STRING, &v_STRING,
4461 {
4462 sent = _dbus_connection_send_unlocked_no_update (connection, ret, NULL);
4463 }
4464 }
4465 else if (dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY))
4466 {
4467 dbus_error_free (&error);
4468 goto out;
4469 }
4470 else
4471 {
4472 ret = dbus_message_new_error (message, error.name, error.message);
4473 dbus_error_free (&error);
4474
4475 if (ret == NULL)
4476 goto out;
4477
4478 sent = _dbus_connection_send_unlocked_no_update (connection, ret,
4479 NULL);
4480 }
4481
4482 _dbus_string_free (&uuid);
4483 }
4484 else
4485 {
4486 /* We need to bounce anything else with this interface, otherwise apps
4487 * could start extending the interface and when we added extensions
4488 * here to DBusConnection we'd break those apps.
4489 */
4490 ret = dbus_message_new_error (message,
4492 "Unknown method invoked on org.freedesktop.DBus.Peer interface");
4493 if (ret == NULL)
4494 goto out;
4495
4496 sent = _dbus_connection_send_unlocked_no_update (connection, ret, NULL);
4497 }
4498
4499out:
4500 if (ret == NULL)
4501 {
4502 _dbus_list_free_link (expire_link);
4503 }
4504 else
4505 {
4506 /* It'll be safe to unref the reply when we unlock */
4507 expire_link->data = ret;
4508 _dbus_list_prepend_link (&connection->expired_messages, expire_link);
4509 }
4510
4511 if (!sent)
4513
4515}
4516
4523static DBusHandlerResult
4524_dbus_connection_run_builtin_filters_unlocked_no_update (DBusConnection *connection,
4525 DBusMessage *message)
4526{
4527 /* We just run one filter for now but have the option to run more
4528 if the spec calls for it in the future */
4529
4530 return _dbus_connection_peer_filter_unlocked_no_update (connection, message);
4531}
4532
4577{
4578 DBusMessage *message;
4579 DBusList *link, *filter_list_copy, *message_link;
4580 DBusHandlerResult result;
4581 DBusPendingCall *pending;
4582 dbus_int32_t reply_serial;
4583 DBusDispatchStatus status;
4584 dbus_bool_t found_object;
4585
4586 _dbus_return_val_if_fail (connection != NULL, DBUS_DISPATCH_COMPLETE);
4587
4588 _dbus_verbose ("\n");
4589
4590 CONNECTION_LOCK (connection);
4591 status = _dbus_connection_get_dispatch_status_unlocked (connection);
4592 if (status != DBUS_DISPATCH_DATA_REMAINS)
4593 {
4594 /* unlocks and calls out to user code */
4595 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
4596 return status;
4597 }
4598
4599 /* We need to ref the connection since the callback could potentially
4600 * drop the last ref to it
4601 */
4602 _dbus_connection_ref_unlocked (connection);
4603
4604 _dbus_connection_acquire_dispatch (connection);
4605 HAVE_LOCK_CHECK (connection);
4606
4607 message_link = _dbus_connection_pop_message_link_unlocked (connection);
4608 if (message_link == NULL)
4609 {
4610 /* another thread dispatched our stuff */
4611
4612 _dbus_verbose ("another thread dispatched message (during acquire_dispatch above)\n");
4613
4614 _dbus_connection_release_dispatch (connection);
4615
4616 status = _dbus_connection_get_dispatch_status_unlocked (connection);
4617
4618 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
4619
4620 dbus_connection_unref (connection);
4621
4622 return status;
4623 }
4624
4625 message = message_link->data;
4626
4627 _dbus_verbose (" dispatching message %p (%s %s %s '%s')\n",
4628 message,
4630 dbus_message_get_interface (message) ?
4631 dbus_message_get_interface (message) :
4632 "no interface",
4633 dbus_message_get_member (message) ?
4634 dbus_message_get_member (message) :
4635 "no member",
4636 dbus_message_get_signature (message));
4637
4639
4640 /* Pending call handling must be first, because if you do
4641 * dbus_connection_send_with_reply_and_block() or
4642 * dbus_pending_call_block() then no handlers/filters will be run on
4643 * the reply. We want consistent semantics in the case where we
4644 * dbus_connection_dispatch() the reply.
4645 */
4646
4647 reply_serial = dbus_message_get_reply_serial (message);
4648 pending = _dbus_hash_table_lookup_int (connection->pending_replies,
4649 reply_serial);
4650 if (pending)
4651 {
4652 _dbus_verbose ("Dispatching a pending reply\n");
4653 complete_pending_call_and_unlock (connection, pending, message);
4654 pending = NULL; /* it's probably unref'd */
4655
4656 CONNECTION_LOCK (connection);
4657 _dbus_verbose ("pending call completed in dispatch\n");
4659 goto out;
4660 }
4661
4662 result = _dbus_connection_run_builtin_filters_unlocked_no_update (connection, message);
4664 goto out;
4665
4666 if (!_dbus_list_copy (&connection->filter_list, &filter_list_copy))
4667 {
4668 _dbus_connection_release_dispatch (connection);
4669 HAVE_LOCK_CHECK (connection);
4670
4671 _dbus_connection_failed_pop (connection, message_link);
4672
4673 /* unlocks and calls user code */
4674 _dbus_connection_update_dispatch_status_and_unlock (connection,
4676 dbus_connection_unref (connection);
4677
4679 }
4680
4681 _dbus_list_foreach (&filter_list_copy,
4682 (DBusForeachFunction)_dbus_message_filter_ref,
4683 NULL);
4684
4685 /* We're still protected from dispatch() reentrancy here
4686 * since we acquired the dispatcher
4687 */
4688 CONNECTION_UNLOCK (connection);
4689
4690 link = _dbus_list_get_first_link (&filter_list_copy);
4691 while (link != NULL)
4692 {
4693 DBusMessageFilter *filter = link->data;
4694 DBusList *next = _dbus_list_get_next_link (&filter_list_copy, link);
4695
4696 if (filter->function == NULL)
4697 {
4698 _dbus_verbose (" filter was removed in a callback function\n");
4699 link = next;
4700 continue;
4701 }
4702
4703 _dbus_verbose (" running filter on message %p\n", message);
4704 result = (* filter->function) (connection, message, filter->user_data);
4705
4707 break;
4708
4709 link = next;
4710 }
4711
4712 _dbus_list_foreach (&filter_list_copy,
4713 (DBusForeachFunction)_dbus_message_filter_unref,
4714 NULL);
4715 _dbus_list_clear (&filter_list_copy);
4716
4717 CONNECTION_LOCK (connection);
4718
4719 if (result == DBUS_HANDLER_RESULT_NEED_MEMORY)
4720 {
4721 _dbus_verbose ("No memory\n");
4722 goto out;
4723 }
4724 else if (result == DBUS_HANDLER_RESULT_HANDLED)
4725 {
4726 _dbus_verbose ("filter handled message in dispatch\n");
4727 goto out;
4728 }
4729
4730 /* We're still protected from dispatch() reentrancy here
4731 * since we acquired the dispatcher
4732 */
4733 _dbus_verbose (" running object path dispatch on message %p (%s %s %s '%s')\n",
4734 message,
4736 dbus_message_get_interface (message) ?
4737 dbus_message_get_interface (message) :
4738 "no interface",
4739 dbus_message_get_member (message) ?
4740 dbus_message_get_member (message) :
4741 "no member",
4742 dbus_message_get_signature (message));
4743
4744 HAVE_LOCK_CHECK (connection);
4745 result = _dbus_object_tree_dispatch_and_unlock (connection->objects,
4746 message,
4747 &found_object);
4748
4749 CONNECTION_LOCK (connection);
4750
4752 {
4753 _dbus_verbose ("object tree handled message in dispatch\n");
4754 goto out;
4755 }
4756
4758 {
4759 DBusMessage *reply;
4760 DBusString str;
4761 DBusPreallocatedSend *preallocated;
4762 DBusList *expire_link;
4763
4764 _dbus_verbose (" sending error %s\n",
4766
4767 if (!_dbus_string_init (&str))
4768 {
4770 _dbus_verbose ("no memory for error string in dispatch\n");
4771 goto out;
4772 }
4773
4774 if (!_dbus_string_append_printf (&str,
4775 "Method \"%s\" with signature \"%s\" on interface \"%s\" doesn't exist\n",
4776 dbus_message_get_member (message),
4778 dbus_message_get_interface (message)))
4779 {
4780 _dbus_string_free (&str);
4782 _dbus_verbose ("no memory for error string in dispatch\n");
4783 goto out;
4784 }
4785
4786 reply = dbus_message_new_error (message,
4788 _dbus_string_get_const_data (&str));
4789 _dbus_string_free (&str);
4790
4791 if (reply == NULL)
4792 {
4794 _dbus_verbose ("no memory for error reply in dispatch\n");
4795 goto out;
4796 }
4797
4798 expire_link = _dbus_list_alloc_link (reply);
4799
4800 if (expire_link == NULL)
4801 {
4802 dbus_message_unref (reply);
4804 _dbus_verbose ("no memory for error send in dispatch\n");
4805 goto out;
4806 }
4807
4808 preallocated = _dbus_connection_preallocate_send_unlocked (connection);
4809
4810 if (preallocated == NULL)
4811 {
4812 _dbus_list_free_link (expire_link);
4813 /* It's OK that this is finalized, because it hasn't been seen by
4814 * anything that could attach user callbacks */
4815 dbus_message_unref (reply);
4817 _dbus_verbose ("no memory for error send in dispatch\n");
4818 goto out;
4819 }
4820
4821 _dbus_connection_send_preallocated_unlocked_no_update (connection, preallocated,
4822 reply, NULL);
4823 /* reply will be freed when we release the lock */
4824 _dbus_list_prepend_link (&connection->expired_messages, expire_link);
4825
4827 }
4828
4829 _dbus_verbose (" done dispatching %p (%s %s %s '%s') on connection %p\n", message,
4831 dbus_message_get_interface (message) ?
4832 dbus_message_get_interface (message) :
4833 "no interface",
4834 dbus_message_get_member (message) ?
4835 dbus_message_get_member (message) :
4836 "no member",
4838 connection);
4839
4840 out:
4841 if (result == DBUS_HANDLER_RESULT_NEED_MEMORY)
4842 {
4843 _dbus_verbose ("out of memory\n");
4844
4845 /* Put message back, and we'll start over.
4846 * Yes this means handlers must be idempotent if they
4847 * don't return HANDLED; c'est la vie.
4848 */
4849 _dbus_connection_putback_message_link_unlocked (connection,
4850 message_link);
4851 /* now we don't want to free them */
4852 message_link = NULL;
4853 message = NULL;
4854 }
4855 else
4856 {
4857 _dbus_verbose (" ... done dispatching\n");
4858 }
4859
4860 _dbus_connection_release_dispatch (connection);
4861 HAVE_LOCK_CHECK (connection);
4862
4863 if (message != NULL)
4864 {
4865 /* We don't want this message to count in maximum message limits when
4866 * computing the dispatch status, below. We have to drop the lock
4867 * temporarily, because finalizing a message can trigger callbacks.
4868 *
4869 * We have a reference to the connection, and we don't use any cached
4870 * pointers to the connection's internals below this point, so it should
4871 * be safe to drop the lock and take it back. */
4872 CONNECTION_UNLOCK (connection);
4873 dbus_message_unref (message);
4874 CONNECTION_LOCK (connection);
4875 }
4876
4877 if (message_link != NULL)
4878 _dbus_list_free_link (message_link);
4879
4880 _dbus_verbose ("before final status update\n");
4881 status = _dbus_connection_get_dispatch_status_unlocked (connection);
4882
4883 /* unlocks and calls user code */
4884 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
4885
4886 dbus_connection_unref (connection);
4887
4888 return status;
4889}
4890
4954 DBusAddWatchFunction add_function,
4955 DBusRemoveWatchFunction remove_function,
4956 DBusWatchToggledFunction toggled_function,
4957 void *data,
4958 DBusFreeFunction free_data_function)
4959{
4960 dbus_bool_t retval;
4961
4962 _dbus_return_val_if_fail (connection != NULL, FALSE);
4963
4964 CONNECTION_LOCK (connection);
4965
4966 retval = _dbus_watch_list_set_functions (connection->watches,
4967 add_function, remove_function,
4968 toggled_function,
4969 data, free_data_function);
4970
4971 CONNECTION_UNLOCK (connection);
4972
4973 return retval;
4974}
4975
5017 DBusAddTimeoutFunction add_function,
5018 DBusRemoveTimeoutFunction remove_function,
5019 DBusTimeoutToggledFunction toggled_function,
5020 void *data,
5021 DBusFreeFunction free_data_function)
5022{
5023 dbus_bool_t retval;
5024
5025 _dbus_return_val_if_fail (connection != NULL, FALSE);
5026
5027 CONNECTION_LOCK (connection);
5028
5029 retval = _dbus_timeout_list_set_functions (connection->timeouts,
5030 add_function, remove_function,
5031 toggled_function,
5032 data, free_data_function);
5033
5034 CONNECTION_UNLOCK (connection);
5035
5036 return retval;
5037}
5038
5053void
5055 DBusWakeupMainFunction wakeup_main_function,
5056 void *data,
5057 DBusFreeFunction free_data_function)
5058{
5059 void *old_data;
5060 DBusFreeFunction old_free_data;
5061
5062 _dbus_return_if_fail (connection != NULL);
5063
5064 CONNECTION_LOCK (connection);
5065 old_data = connection->wakeup_main_data;
5066 old_free_data = connection->free_wakeup_main_data;
5067
5068 connection->wakeup_main_function = wakeup_main_function;
5069 connection->wakeup_main_data = data;
5070 connection->free_wakeup_main_data = free_data_function;
5071
5072 CONNECTION_UNLOCK (connection);
5073
5074 /* Callback outside the lock */
5075 if (old_free_data)
5076 (*old_free_data) (old_data);
5077}
5078
5099void
5102 void *data,
5103 DBusFreeFunction free_data_function)
5104{
5105 void *old_data;
5106 DBusFreeFunction old_free_data;
5107
5108 _dbus_return_if_fail (connection != NULL);
5109
5110 CONNECTION_LOCK (connection);
5111 old_data = connection->dispatch_status_data;
5112 old_free_data = connection->free_dispatch_status_data;
5113
5114 connection->dispatch_status_function = function;
5115 connection->dispatch_status_data = data;
5116 connection->free_dispatch_status_data = free_data_function;
5117
5118 CONNECTION_UNLOCK (connection);
5119
5120 /* Callback outside the lock */
5121 if (old_free_data)
5122 (*old_free_data) (old_data);
5123}
5124
5146 int *fd)
5147{
5148 _dbus_return_val_if_fail (connection != NULL, FALSE);
5149 _dbus_return_val_if_fail (connection->transport != NULL, FALSE);
5150
5151#ifdef DBUS_WIN
5152 /* FIXME do this on a lower level */
5153 return FALSE;
5154#endif
5155
5156 return dbus_connection_get_socket(connection, fd);
5157}
5158
5176 int *fd)
5177{
5178 dbus_bool_t retval;
5179 DBusSocket s = DBUS_SOCKET_INIT;
5180
5181 _dbus_return_val_if_fail (connection != NULL, FALSE);
5182 _dbus_return_val_if_fail (connection->transport != NULL, FALSE);
5183
5184 CONNECTION_LOCK (connection);
5185
5186 retval = _dbus_transport_get_socket_fd (connection->transport, &s);
5187
5188 if (retval)
5189 {
5190 *fd = _dbus_socket_get_int (s);
5191 }
5192
5193 CONNECTION_UNLOCK (connection);
5194
5195 return retval;
5196}
5197
5198
5223 unsigned long *uid)
5224{
5225 dbus_bool_t result;
5226
5227 _dbus_return_val_if_fail (connection != NULL, FALSE);
5228 _dbus_return_val_if_fail (uid != NULL, FALSE);
5229
5230 CONNECTION_LOCK (connection);
5231
5233 result = FALSE;
5234 else
5235 result = _dbus_transport_get_unix_user (connection->transport,
5236 uid);
5237
5238#ifdef DBUS_WIN
5239 _dbus_assert (!result);
5240#endif
5241
5242 CONNECTION_UNLOCK (connection);
5243
5244 return result;
5245}
5246
5259 unsigned long *pid)
5260{
5261 dbus_bool_t result;
5262
5263 _dbus_return_val_if_fail (connection != NULL, FALSE);
5264 _dbus_return_val_if_fail (pid != NULL, FALSE);
5265
5266 CONNECTION_LOCK (connection);
5267
5269 result = FALSE;
5270 else
5271 result = _dbus_transport_get_unix_process_id (connection->transport,
5272 pid);
5273
5274 CONNECTION_UNLOCK (connection);
5275
5276 return result;
5277}
5278
5292 void **data,
5293 dbus_int32_t *data_size)
5294{
5295 dbus_bool_t result;
5296
5297 _dbus_return_val_if_fail (connection != NULL, FALSE);
5298 _dbus_return_val_if_fail (data != NULL, FALSE);
5299 _dbus_return_val_if_fail (data_size != NULL, FALSE);
5300
5301 CONNECTION_LOCK (connection);
5302
5304 result = FALSE;
5305 else
5307 data,
5308 data_size);
5309 CONNECTION_UNLOCK (connection);
5310
5311 return result;
5312}
5313
5336void
5339 void *data,
5340 DBusFreeFunction free_data_function)
5341{
5342 void *old_data = NULL;
5343 DBusFreeFunction old_free_function = NULL;
5344
5345 _dbus_return_if_fail (connection != NULL);
5346
5347 CONNECTION_LOCK (connection);
5349 function, data, free_data_function,
5350 &old_data, &old_free_function);
5351 CONNECTION_UNLOCK (connection);
5352
5353 if (old_free_function != NULL)
5354 (* old_free_function) (old_data);
5355}
5356
5357/* Same calling convention as dbus_connection_get_windows_user */
5359_dbus_connection_get_linux_security_label (DBusConnection *connection,
5360 char **label_p)
5361{
5362 dbus_bool_t result;
5363
5364 _dbus_assert (connection != NULL);
5365 _dbus_assert (label_p != NULL);
5366
5367 CONNECTION_LOCK (connection);
5368
5370 result = FALSE;
5371 else
5372 result = _dbus_transport_get_linux_security_label (connection->transport,
5373 label_p);
5374#ifndef __linux__
5375 _dbus_assert (!result);
5376#endif
5377
5378 CONNECTION_UNLOCK (connection);
5379
5380 return result;
5381}
5382
5416 char **windows_sid_p)
5417{
5418 dbus_bool_t result;
5419
5420 _dbus_return_val_if_fail (connection != NULL, FALSE);
5421 _dbus_return_val_if_fail (windows_sid_p != NULL, FALSE);
5422
5423 CONNECTION_LOCK (connection);
5424
5426 result = FALSE;
5427 else
5428 result = _dbus_transport_get_windows_user (connection->transport,
5429 windows_sid_p);
5430
5431#ifdef DBUS_UNIX
5432 _dbus_assert (!result);
5433#endif
5434
5435 CONNECTION_UNLOCK (connection);
5436
5437 return result;
5438}
5439
5461void
5464 void *data,
5465 DBusFreeFunction free_data_function)
5466{
5467 void *old_data = NULL;
5468 DBusFreeFunction old_free_function = NULL;
5469
5470 _dbus_return_if_fail (connection != NULL);
5471
5472 CONNECTION_LOCK (connection);
5474 function, data, free_data_function,
5475 &old_data, &old_free_function);
5476 CONNECTION_UNLOCK (connection);
5477
5478 if (old_free_function != NULL)
5479 (* old_free_function) (old_data);
5480}
5481
5508void
5510 dbus_bool_t value)
5511{
5512 _dbus_return_if_fail (connection != NULL);
5513
5514 CONNECTION_LOCK (connection);
5516 CONNECTION_UNLOCK (connection);
5517}
5518
5536void
5538 dbus_bool_t value)
5539{
5540 _dbus_return_if_fail (connection != NULL);
5541
5542 CONNECTION_LOCK (connection);
5543 connection->route_peer_messages = value;
5544 CONNECTION_UNLOCK (connection);
5545}
5546
5571 void *user_data,
5572 DBusFreeFunction free_data_function)
5573{
5574 DBusMessageFilter *filter;
5575
5576 _dbus_return_val_if_fail (connection != NULL, FALSE);
5577 _dbus_return_val_if_fail (function != NULL, FALSE);
5578
5579 filter = dbus_new0 (DBusMessageFilter, 1);
5580 if (filter == NULL)
5581 return FALSE;
5582
5583 _dbus_atomic_inc (&filter->refcount);
5584
5585 CONNECTION_LOCK (connection);
5586
5587 if (!_dbus_list_append (&connection->filter_list,
5588 filter))
5589 {
5590 _dbus_message_filter_unref (filter);
5591 CONNECTION_UNLOCK (connection);
5592 return FALSE;
5593 }
5594
5595 /* Fill in filter after all memory allocated,
5596 * so we don't run the free_user_data_function
5597 * if the add_filter() fails
5598 */
5599
5600 filter->function = function;
5601 filter->user_data = user_data;
5602 filter->free_user_data_function = free_data_function;
5603
5604 CONNECTION_UNLOCK (connection);
5605 return TRUE;
5606}
5607
5620void
5623 void *user_data)
5624{
5625 DBusList *link;
5626 DBusMessageFilter *filter;
5627
5628 _dbus_return_if_fail (connection != NULL);
5629 _dbus_return_if_fail (function != NULL);
5630
5631 CONNECTION_LOCK (connection);
5632
5633 filter = NULL;
5634
5635 link = _dbus_list_get_last_link (&connection->filter_list);
5636 while (link != NULL)
5637 {
5638 filter = link->data;
5639
5640 if (filter->function == function &&
5641 filter->user_data == user_data)
5642 {
5643 _dbus_list_remove_link (&connection->filter_list, link);
5644 filter->function = NULL;
5645
5646 break;
5647 }
5648
5649 link = _dbus_list_get_prev_link (&connection->filter_list, link);
5650 filter = NULL;
5651 }
5652
5653 CONNECTION_UNLOCK (connection);
5654
5655#ifndef DBUS_DISABLE_CHECKS
5656 if (filter == NULL)
5657 {
5658 _dbus_warn_check_failed ("Attempt to remove filter function %p user data %p, but no such filter has been added",
5659 function, user_data);
5660 return;
5661 }
5662#endif
5663
5664 /* Call application code */
5665 if (filter->free_user_data_function)
5666 (* filter->free_user_data_function) (filter->user_data);
5667
5668 filter->free_user_data_function = NULL;
5669 filter->user_data = NULL;
5670
5671 _dbus_message_filter_unref (filter);
5672}
5673
5689static dbus_bool_t
5690_dbus_connection_register_object_path (DBusConnection *connection,
5691 dbus_bool_t fallback,
5692 const char *path,
5693 const DBusObjectPathVTable *vtable,
5694 void *user_data,
5695 DBusError *error)
5696{
5697 char **decomposed_path;
5698 dbus_bool_t retval;
5699
5700 if (!_dbus_decompose_path (path, strlen (path), &decomposed_path, NULL))
5701 return FALSE;
5702
5703 CONNECTION_LOCK (connection);
5704
5705 retval = _dbus_object_tree_register (connection->objects,
5706 fallback,
5707 (const char **) decomposed_path, vtable,
5708 user_data, error);
5709
5710 CONNECTION_UNLOCK (connection);
5711
5712 dbus_free_string_array (decomposed_path);
5713
5714 return retval;
5715}
5716
5731 const char *path,
5732 const DBusObjectPathVTable *vtable,
5733 void *user_data,
5734 DBusError *error)
5735{
5736 _dbus_return_val_if_fail (connection != NULL, FALSE);
5737 _dbus_return_val_if_fail (path != NULL, FALSE);
5738 _dbus_return_val_if_fail (path[0] == '/', FALSE);
5739 _dbus_return_val_if_fail (vtable != NULL, FALSE);
5740
5741 return _dbus_connection_register_object_path (connection, FALSE, path, vtable, user_data, error);
5742}
5743
5761 const char *path,
5762 const DBusObjectPathVTable *vtable,
5763 void *user_data)
5764{
5765 dbus_bool_t retval;
5766 DBusError error = DBUS_ERROR_INIT;
5767
5768 _dbus_return_val_if_fail (connection != NULL, FALSE);
5769 _dbus_return_val_if_fail (path != NULL, FALSE);
5770 _dbus_return_val_if_fail (path[0] == '/', FALSE);
5771 _dbus_return_val_if_fail (vtable != NULL, FALSE);
5772
5773 retval = _dbus_connection_register_object_path (connection, FALSE, path, vtable, user_data, &error);
5774
5776 {
5777 _dbus_warn ("%s", error.message);
5778 dbus_error_free (&error);
5779 return FALSE;
5780 }
5781
5782 return retval;
5783}
5784
5801 const char *path,
5802 const DBusObjectPathVTable *vtable,
5803 void *user_data,
5804 DBusError *error)
5805{
5806 _dbus_return_val_if_fail (connection != NULL, FALSE);
5807 _dbus_return_val_if_fail (path != NULL, FALSE);
5808 _dbus_return_val_if_fail (path[0] == '/', FALSE);
5809 _dbus_return_val_if_fail (vtable != NULL, FALSE);
5810
5811 return _dbus_connection_register_object_path (connection, TRUE, path, vtable, user_data, error);
5812}
5813
5833 const char *path,
5834 const DBusObjectPathVTable *vtable,
5835 void *user_data)
5836{
5837 dbus_bool_t retval;
5838 DBusError error = DBUS_ERROR_INIT;
5839
5840 _dbus_return_val_if_fail (connection != NULL, FALSE);
5841 _dbus_return_val_if_fail (path != NULL, FALSE);
5842 _dbus_return_val_if_fail (path[0] == '/', FALSE);
5843 _dbus_return_val_if_fail (vtable != NULL, FALSE);
5844
5845 retval = _dbus_connection_register_object_path (connection, TRUE, path, vtable, user_data, &error);
5846
5848 {
5849 _dbus_warn ("%s", error.message);
5850 dbus_error_free (&error);
5851 return FALSE;
5852 }
5853
5854 return retval;
5855}
5856
5868 const char *path)
5869{
5870 char **decomposed_path;
5871
5872 _dbus_return_val_if_fail (connection != NULL, FALSE);
5873 _dbus_return_val_if_fail (path != NULL, FALSE);
5874 _dbus_return_val_if_fail (path[0] == '/', FALSE);
5875
5876 if (!_dbus_decompose_path (path, strlen (path), &decomposed_path, NULL))
5877 return FALSE;
5878
5879 CONNECTION_LOCK (connection);
5880
5881 _dbus_object_tree_unregister_and_unlock (connection->objects, (const char **) decomposed_path);
5882
5883 dbus_free_string_array (decomposed_path);
5884
5885 return TRUE;
5886}
5887
5900 const char *path,
5901 void **data_p)
5902{
5903 char **decomposed_path;
5904
5905 _dbus_return_val_if_fail (connection != NULL, FALSE);
5906 _dbus_return_val_if_fail (path != NULL, FALSE);
5907 _dbus_return_val_if_fail (data_p != NULL, FALSE);
5908
5909 *data_p = NULL;
5910
5911 if (!_dbus_decompose_path (path, strlen (path), &decomposed_path, NULL))
5912 return FALSE;
5913
5914 CONNECTION_LOCK (connection);
5915
5916 *data_p = _dbus_object_tree_get_user_data_unlocked (connection->objects, (const char**) decomposed_path);
5917
5918 CONNECTION_UNLOCK (connection);
5919
5920 dbus_free_string_array (decomposed_path);
5921
5922 return TRUE;
5923}
5924
5937 const char *parent_path,
5938 char ***child_entries)
5939{
5940 char **decomposed_path;
5941 dbus_bool_t retval;
5942 _dbus_return_val_if_fail (connection != NULL, FALSE);
5943 _dbus_return_val_if_fail (parent_path != NULL, FALSE);
5944 _dbus_return_val_if_fail (parent_path[0] == '/', FALSE);
5945 _dbus_return_val_if_fail (child_entries != NULL, FALSE);
5946
5947 if (!_dbus_decompose_path (parent_path, strlen (parent_path), &decomposed_path, NULL))
5948 return FALSE;
5949
5950 CONNECTION_LOCK (connection);
5951
5953 (const char **) decomposed_path,
5954 child_entries);
5955 dbus_free_string_array (decomposed_path);
5956
5957 return retval;
5958}
5959
5960static DBusDataSlotAllocator slot_allocator =
5961 _DBUS_DATA_SLOT_ALLOCATOR_INIT (_DBUS_LOCK_NAME (connection_slots));
5962
5979{
5980 return _dbus_data_slot_allocator_alloc (&slot_allocator,
5981 slot_p);
5982}
5983
5995void
5997{
5998 _dbus_return_if_fail (*slot_p >= 0);
5999
6000 _dbus_data_slot_allocator_free (&slot_allocator, slot_p);
6001}
6002
6027 dbus_int32_t slot,
6028 void *data,
6029 DBusFreeFunction free_data_func)
6030{
6031 DBusFreeFunction old_free_func;
6032 void *old_data;
6033 dbus_bool_t retval;
6034
6035 _dbus_return_val_if_fail (connection != NULL, FALSE);
6036 _dbus_return_val_if_fail (slot >= 0, FALSE);
6037
6038 SLOTS_LOCK (connection);
6039
6040 retval = _dbus_data_slot_list_set (&slot_allocator,
6041 &connection->slot_list,
6042 slot, data, free_data_func,
6043 &old_free_func, &old_data);
6044
6045 SLOTS_UNLOCK (connection);
6046
6047 if (retval)
6048 {
6049 /* Do the actual free outside the connection lock */
6050 if (old_free_func)
6051 (* old_free_func) (old_data);
6052 }
6053
6054 return retval;
6055}
6056
6074void*
6076 dbus_int32_t slot)
6077{
6078 void *res;
6079
6080 _dbus_return_val_if_fail (connection != NULL, NULL);
6081 _dbus_return_val_if_fail (slot >= 0, NULL);
6082
6083 SLOTS_LOCK (connection);
6084
6085 res = _dbus_data_slot_list_get (&slot_allocator,
6086 &connection->slot_list,
6087 slot);
6088
6089 SLOTS_UNLOCK (connection);
6090
6091 return res;
6092}
6093
6100void
6102{
6103 _dbus_modify_sigpipe = will_modify_sigpipe != FALSE;
6104}
6105
6114void
6116 long size)
6117{
6118 _dbus_return_if_fail (connection != NULL);
6119
6120 CONNECTION_LOCK (connection);
6122 size);
6123 CONNECTION_UNLOCK (connection);
6124}
6125
6132long
6134{
6135 long res;
6136
6137 _dbus_return_val_if_fail (connection != NULL, 0);
6138
6139 CONNECTION_LOCK (connection);
6141 CONNECTION_UNLOCK (connection);
6142 return res;
6143}
6144
6153void
6155 long n)
6156{
6157 _dbus_return_if_fail (connection != NULL);
6158
6159 CONNECTION_LOCK (connection);
6161 n);
6162 CONNECTION_UNLOCK (connection);
6163}
6164
6171long
6173{
6174 long res;
6175
6176 _dbus_return_val_if_fail (connection != NULL, 0);
6177
6178 CONNECTION_LOCK (connection);
6180 CONNECTION_UNLOCK (connection);
6181 return res;
6182}
6183
6209void
6211 long size)
6212{
6213 _dbus_return_if_fail (connection != NULL);
6214
6215 CONNECTION_LOCK (connection);
6217 size);
6218 CONNECTION_UNLOCK (connection);
6219}
6220
6227long
6229{
6230 long res;
6231
6232 _dbus_return_val_if_fail (connection != NULL, 0);
6233
6234 CONNECTION_LOCK (connection);
6236 CONNECTION_UNLOCK (connection);
6237 return res;
6238}
6239
6251void
6253 long n)
6254{
6255 _dbus_return_if_fail (connection != NULL);
6256
6257 CONNECTION_LOCK (connection);
6259 n);
6260 CONNECTION_UNLOCK (connection);
6261}
6262
6269long
6271{
6272 long res;
6273
6274 _dbus_return_val_if_fail (connection != NULL, 0);
6275
6276 CONNECTION_LOCK (connection);
6278 CONNECTION_UNLOCK (connection);
6279 return res;
6280}
6281
6292long
6294{
6295 long res;
6296
6297 _dbus_return_val_if_fail (connection != NULL, 0);
6298
6299 CONNECTION_LOCK (connection);
6301 CONNECTION_UNLOCK (connection);
6302 return res;
6303}
6304
6305#ifdef DBUS_ENABLE_STATS
6306void
6307_dbus_connection_get_stats (DBusConnection *connection,
6308 dbus_uint32_t *in_messages,
6309 dbus_uint32_t *in_bytes,
6310 dbus_uint32_t *in_fds,
6311 dbus_uint32_t *in_peak_bytes,
6312 dbus_uint32_t *in_peak_fds,
6313 dbus_uint32_t *out_messages,
6314 dbus_uint32_t *out_bytes,
6315 dbus_uint32_t *out_fds,
6316 dbus_uint32_t *out_peak_bytes,
6317 dbus_uint32_t *out_peak_fds)
6318{
6319 CONNECTION_LOCK (connection);
6320
6321 if (in_messages != NULL)
6322 *in_messages = connection->n_incoming;
6323
6324 _dbus_transport_get_stats (connection->transport,
6325 in_bytes, in_fds, in_peak_bytes, in_peak_fds);
6326
6327 if (out_messages != NULL)
6328 *out_messages = connection->n_outgoing;
6329
6330 if (out_bytes != NULL)
6331 *out_bytes = _dbus_counter_get_size_value (connection->outgoing_counter);
6332
6333 if (out_fds != NULL)
6334 *out_fds = _dbus_counter_get_unix_fd_value (connection->outgoing_counter);
6335
6336 if (out_peak_bytes != NULL)
6337 *out_peak_bytes = _dbus_counter_get_peak_size_value (connection->outgoing_counter);
6338
6339 if (out_peak_fds != NULL)
6340 *out_peak_fds = _dbus_counter_get_peak_unix_fd_value (connection->outgoing_counter);
6341
6342 CONNECTION_UNLOCK (connection);
6343}
6344#endif /* DBUS_ENABLE_STATS */
6345
6353long
6355{
6356 long res;
6357
6358 _dbus_return_val_if_fail (connection != NULL, 0);
6359
6360 CONNECTION_LOCK (connection);
6362 CONNECTION_UNLOCK (connection);
6363 return res;
6364}
6365
6366#ifdef DBUS_ENABLE_EMBEDDED_TESTS
6373const char*
6374_dbus_connection_get_address (DBusConnection *connection)
6375{
6376 return _dbus_transport_get_address (connection->transport);
6377}
6378#endif
6379
void dbus_address_entries_free(DBusAddressEntry **entries)
Frees a NULL-terminated array of address entries.
Definition: dbus-address.c:189
dbus_bool_t dbus_parse_address(const char *address, DBusAddressEntry ***entry_result, int *array_len, DBusError *error)
Parses an address string of the form:
Definition: dbus-address.c:363
const char * dbus_address_entry_get_value(DBusAddressEntry *entry, const char *key)
Returns a value from a key of an entry.
Definition: dbus-address.c:244
void _dbus_bus_notify_shared_connection_disconnected_unlocked(DBusConnection *connection)
Internal function that checks to see if this is a shared connection owned by the bus and if it is unr...
Definition: dbus-bus.c:387
dbus_bool_t _dbus_connection_handle_watch(DBusWatch *watch, unsigned int condition, void *data)
A callback for use with dbus_watch_new() to create a DBusWatch.
void _dbus_connection_toggle_timeout_unlocked(DBusConnection *connection, DBusTimeout *timeout, dbus_bool_t enabled)
Toggles a timeout and notifies app via connection's DBusTimeoutToggledFunction if available.
dbus_bool_t dbus_connection_has_messages_to_send(DBusConnection *connection)
Checks whether there are messages in the outgoing message queue.
void _dbus_connection_do_iteration_unlocked(DBusConnection *connection, DBusPendingCall *pending, unsigned int flags, int timeout_milliseconds)
Queues incoming messages and sends outgoing messages for this connection, optionally blocking in the ...
dbus_bool_t _dbus_connection_send_and_unlock(DBusConnection *connection, DBusMessage *message, dbus_uint32_t *client_serial)
Like dbus_connection_send(), but assumes the connection is already locked on function entry,...
DBusConnection * _dbus_connection_new_for_transport(DBusTransport *transport)
Creates a new connection for the given transport.
dbus_bool_t _dbus_connection_has_messages_to_send_unlocked(DBusConnection *connection)
Checks whether there are messages in the outgoing message queue.
void(* DBusWatchRemoveFunction)(DBusWatchList *list, DBusWatch *watch)
Function to be called in protected_change_watch() with refcount held.
void _dbus_connection_unlock(DBusConnection *connection)
Releases the connection lock.
void _dbus_connection_lock(DBusConnection *connection)
Acquires the connection lock.
void _dbus_connection_remove_watch_unlocked(DBusConnection *connection, DBusWatch *watch)
Removes a watch using the connection's DBusRemoveWatchFunction if available.
dbus_bool_t _dbus_connection_add_timeout_unlocked(DBusConnection *connection, DBusTimeout *timeout)
Adds a timeout using the connection's DBusAddTimeoutFunction if available.
void _dbus_connection_toggle_watch_unlocked(DBusConnection *connection, DBusWatch *watch, dbus_bool_t enabled)
Toggles a watch and notifies app via connection's DBusWatchToggledFunction if available.
void(* DBusTimeoutToggleFunction)(DBusTimeoutList *list, DBusTimeout *timeout, dbus_bool_t enabled)
Function to be called in protected_change_timeout() with refcount held.
void(* DBusTimeoutRemoveFunction)(DBusTimeoutList *list, DBusTimeout *timeout)
Function to be called in protected_change_timeout() with refcount held.
dbus_bool_t _dbus_connection_add_watch_unlocked(DBusConnection *connection, DBusWatch *watch)
Adds a watch using the connection's DBusAddWatchFunction if available.
void _dbus_connection_remove_pending_call(DBusConnection *connection, DBusPendingCall *pending)
Removes a pending call from the connection, such that the pending reply will be ignored.
void _dbus_connection_close_if_only_one_ref(DBusConnection *connection)
Used internally to handle the semantics of dbus_server_set_new_connection_function().
void _dbus_connection_unref_unlocked(DBusConnection *connection)
Decrements the reference count of a DBusConnection.
DBusMessage * _dbus_connection_get_message_to_send(DBusConnection *connection)
Gets the next outgoing message.
dbus_bool_t(* DBusTimeoutAddFunction)(DBusTimeoutList *list, DBusTimeout *timeout)
Function to be called in protected_change_timeout() with refcount held.
void _dbus_connection_message_sent_unlocked(DBusConnection *connection, DBusMessage *message)
Notifies the connection that a message has been sent, so the message can be removed from the outgoing...
void _dbus_connection_remove_timeout_unlocked(DBusConnection *connection, DBusTimeout *timeout)
Removes a timeout using the connection's DBusRemoveTimeoutFunction if available.
void(* DBusWatchToggleFunction)(DBusWatchList *list, DBusWatch *watch, dbus_bool_t enabled)
Function to be called in protected_change_watch() with refcount held.
void _dbus_connection_queue_received_message_link(DBusConnection *connection, DBusList *link)
Adds a message-containing list link to the incoming message queue, taking ownership of the link and t...
int _dbus_connection_get_pending_fds_count(DBusConnection *connection)
Return how many file descriptors are pending in the loader.
void _dbus_connection_set_pending_fds_function(DBusConnection *connection, DBusPendingFdsChangeFunction callback, void *data)
Register a function to be called whenever the number of pending file descriptors in the loader change...
dbus_bool_t(* DBusWatchAddFunction)(DBusWatchList *list, DBusWatch *watch)
Function to be called in protected_change_watch() with refcount held.
void _dbus_connection_block_pending_call(DBusPendingCall *pending)
Blocks until a pending call times out or gets a reply.
void _dbus_connection_queue_synthesized_message_link(DBusConnection *connection, DBusList *link)
Adds a link + message to the incoming message queue.
void _dbus_connection_close_possibly_shared(DBusConnection *connection)
Closes a shared OR private connection, while dbus_connection_close() can only be used on private conn...
DBusConnection * _dbus_connection_ref_unlocked(DBusConnection *connection)
Increments the reference count of a DBusConnection.
void dbus_connection_return_message(DBusConnection *connection, DBusMessage *message)
Used to return a message after peeking at it using dbus_connection_borrow_message().
void(* DBusWatchToggledFunction)(DBusWatch *watch, void *data)
Called when dbus_watch_get_enabled() may return a different value than it did before.
dbus_bool_t dbus_connection_get_object_path_data(DBusConnection *connection, const char *path, void **data_p)
Gets the user data passed to dbus_connection_register_object_path() or dbus_connection_register_fallb...
void dbus_connection_set_max_message_size(DBusConnection *connection, long size)
Specifies the maximum size message this connection is allowed to receive.
void dbus_connection_flush(DBusConnection *connection)
Blocks until the outgoing message queue is empty.
long dbus_connection_get_max_message_unix_fds(DBusConnection *connection)
Gets the value set by dbus_connection_set_max_message_unix_fds().
void dbus_connection_set_exit_on_disconnect(DBusConnection *connection, dbus_bool_t exit_on_disconnect)
Set whether _exit() should be called when the connection receives a disconnect signal.
dbus_bool_t dbus_connection_get_socket(DBusConnection *connection, int *fd)
Gets the underlying Windows or UNIX socket file descriptor of the connection, if any.
DBusMessage * dbus_connection_pop_message(DBusConnection *connection)
Returns the first-received message from the incoming message queue, removing it from the queue.
long dbus_connection_get_max_received_unix_fds(DBusConnection *connection)
Gets the value set by dbus_connection_set_max_received_unix_fds().
dbus_bool_t dbus_connection_register_object_path(DBusConnection *connection, const char *path, const DBusObjectPathVTable *vtable, void *user_data)
Registers a handler for a given path in the object hierarchy.
void dbus_connection_close(DBusConnection *connection)
Closes a private connection, so no further data can be sent or received.
void dbus_connection_set_max_message_unix_fds(DBusConnection *connection, long n)
Specifies the maximum number of unix fds a message on this connection is allowed to receive.
void dbus_connection_set_wakeup_main_function(DBusConnection *connection, DBusWakeupMainFunction wakeup_main_function, void *data, DBusFreeFunction free_data_function)
Sets the mainloop wakeup function for the connection.
dbus_bool_t dbus_connection_get_windows_user(DBusConnection *connection, char **windows_sid_p)
Gets the Windows user SID of the connection if known.
dbus_bool_t dbus_connection_get_is_authenticated(DBusConnection *connection)
Gets whether the connection was authenticated.
void dbus_connection_send_preallocated(DBusConnection *connection, DBusPreallocatedSend *preallocated, DBusMessage *message, dbus_uint32_t *client_serial)
Sends a message using preallocated resources.
dbus_bool_t dbus_connection_read_write(DBusConnection *connection, int timeout_milliseconds)
This function is intended for use with applications that don't want to write a main loop and deal wit...
long dbus_connection_get_max_received_size(DBusConnection *connection)
Gets the value set by dbus_connection_set_max_received_size().
dbus_bool_t dbus_connection_get_unix_fd(DBusConnection *connection, int *fd)
Get the UNIX file descriptor of the connection, if any.
void(* DBusDispatchStatusFunction)(DBusConnection *connection, DBusDispatchStatus new_status, void *data)
Called when the return value of dbus_connection_get_dispatch_status() may have changed.
dbus_bool_t dbus_connection_can_send_type(DBusConnection *connection, int type)
Tests whether a certain type can be send via the connection.
dbus_bool_t dbus_connection_list_registered(DBusConnection *connection, const char *parent_path, char ***child_entries)
Lists the registered fallback handlers and object path handlers at the given parent_path.
void * dbus_connection_get_data(DBusConnection *connection, dbus_int32_t slot)
Retrieves data previously set with dbus_connection_set_data().
DBusConnection * dbus_connection_open_private(const char *address, DBusError *error)
Opens a new, dedicated connection to a remote address.
long dbus_connection_get_outgoing_size(DBusConnection *connection)
Gets the approximate size in bytes of all messages in the outgoing message queue.
void dbus_connection_set_dispatch_status_function(DBusConnection *connection, DBusDispatchStatusFunction function, void *data, DBusFreeFunction free_data_function)
Set a function to be invoked when the dispatch status changes.
dbus_bool_t dbus_connection_read_write_dispatch(DBusConnection *connection, int timeout_milliseconds)
This function is intended for use with applications that don't want to write a main loop and deal wit...
DBusHandlerResult(* DBusHandleMessageFunction)(DBusConnection *connection, DBusMessage *message, void *user_data)
Called when a message needs to be handled.
void dbus_connection_remove_filter(DBusConnection *connection, DBusHandleMessageFunction function, void *user_data)
Removes a previously-added message filter.
dbus_bool_t dbus_connection_get_is_connected(DBusConnection *connection)
Gets whether the connection is currently open.
DBusPreallocatedSend * dbus_connection_preallocate_send(DBusConnection *connection)
Preallocates resources needed to send a message, allowing the message to be sent without the possibil...
dbus_bool_t(* DBusAddWatchFunction)(DBusWatch *watch, void *data)
Called when libdbus needs a new watch to be monitored by the main loop.
void dbus_connection_unref(DBusConnection *connection)
Decrements the reference count of a DBusConnection, and finalizes it if the count reaches zero.
void dbus_connection_set_max_received_size(DBusConnection *connection, long size)
Sets the maximum total number of bytes that can be used for all messages received on this connection.
void(* DBusTimeoutToggledFunction)(DBusTimeout *timeout, void *data)
Called when dbus_timeout_get_enabled() may return a different value than it did before.
DBusDispatchStatus dbus_connection_dispatch(DBusConnection *connection)
Processes any incoming data.
dbus_bool_t dbus_connection_unregister_object_path(DBusConnection *connection, const char *path)
Unregisters the handler registered with exactly the given path.
void dbus_connection_set_unix_user_function(DBusConnection *connection, DBusAllowUnixUserFunction function, void *data, DBusFreeFunction free_data_function)
Sets a predicate function used to determine whether a given user ID is allowed to connect.
dbus_bool_t dbus_connection_try_register_object_path(DBusConnection *connection, const char *path, const DBusObjectPathVTable *vtable, void *user_data, DBusError *error)
Registers a handler for a given path in the object hierarchy.
void dbus_connection_steal_borrowed_message(DBusConnection *connection, DBusMessage *message)
Used to keep a message after peeking at it using dbus_connection_borrow_message().
dbus_bool_t dbus_connection_allocate_data_slot(dbus_int32_t *slot_p)
Allocates an integer ID to be used for storing application-specific data on any DBusConnection.
void dbus_connection_set_change_sigpipe(dbus_bool_t will_modify_sigpipe)
This function sets a global flag for whether dbus_connection_new() will set SIGPIPE behavior to SIG_I...
long dbus_connection_get_max_message_size(DBusConnection *connection)
Gets the value set by dbus_connection_set_max_message_size().
void dbus_connection_free_data_slot(dbus_int32_t *slot_p)
Deallocates a global ID for connection data slots.
dbus_bool_t(* DBusAddTimeoutFunction)(DBusTimeout *timeout, void *data)
Called when libdbus needs a new timeout to be monitored by the main loop.
void dbus_connection_set_max_received_unix_fds(DBusConnection *connection, long n)
Sets the maximum total number of unix fds that can be used for all messages received on this connecti...
dbus_bool_t dbus_connection_set_data(DBusConnection *connection, dbus_int32_t slot, void *data, DBusFreeFunction free_data_func)
Stores a pointer on a DBusConnection, along with an optional function to be used for freeing the data...
DBusDispatchStatus dbus_connection_get_dispatch_status(DBusConnection *connection)
Gets the current state of the incoming message queue.
DBusMessage * dbus_connection_send_with_reply_and_block(DBusConnection *connection, DBusMessage *message, int timeout_milliseconds, DBusError *error)
Sends a message and blocks a certain time period while waiting for a reply.
dbus_bool_t dbus_connection_try_register_fallback(DBusConnection *connection, const char *path, const DBusObjectPathVTable *vtable, void *user_data, DBusError *error)
Registers a fallback handler for a given subsection of the object hierarchy.
dbus_bool_t dbus_connection_get_adt_audit_session_data(DBusConnection *connection, void **data, dbus_int32_t *data_size)
Gets the ADT audit data of the connection if any.
DBusMessage * dbus_connection_borrow_message(DBusConnection *connection)
Returns the first-received message from the incoming message queue, leaving it in the queue.
dbus_bool_t dbus_connection_send_with_reply(DBusConnection *connection, DBusMessage *message, DBusPendingCall **pending_return, int timeout_milliseconds)
Queues a message to send, as with dbus_connection_send(), but also returns a DBusPendingCall used to ...
void dbus_connection_set_windows_user_function(DBusConnection *connection, DBusAllowWindowsUserFunction function, void *data, DBusFreeFunction free_data_function)
Sets a predicate function used to determine whether a given user ID is allowed to connect.
dbus_bool_t dbus_connection_get_is_anonymous(DBusConnection *connection)
Gets whether the connection is not authenticated as a specific user.
dbus_bool_t dbus_connection_set_timeout_functions(DBusConnection *connection, DBusAddTimeoutFunction add_function, DBusRemoveTimeoutFunction remove_function, DBusTimeoutToggledFunction toggled_function, void *data, DBusFreeFunction free_data_function)
Sets the timeout functions for the connection.
void(* DBusRemoveWatchFunction)(DBusWatch *watch, void *data)
Called when libdbus no longer needs a watch to be monitored by the main loop.
dbus_bool_t(* DBusAllowUnixUserFunction)(DBusConnection *connection, unsigned long uid, void *data)
Called during authentication to check whether the given UNIX user ID is allowed to connect,...
DBusDispatchStatus
Indicates the status of incoming data on a DBusConnection.
dbus_bool_t dbus_connection_register_fallback(DBusConnection *connection, const char *path, const DBusObjectPathVTable *vtable, void *user_data)
Registers a fallback handler for a given subsection of the object hierarchy.
DBusConnection * dbus_connection_open(const char *address, DBusError *error)
Gets a connection to a remote address.
void dbus_connection_free_preallocated_send(DBusConnection *connection, DBusPreallocatedSend *preallocated)
Frees preallocated message-sending resources from dbus_connection_preallocate_send().
long dbus_connection_get_outgoing_unix_fds(DBusConnection *connection)
Gets the approximate number of uni fds of all messages in the outgoing message queue.
void(* DBusWakeupMainFunction)(void *data)
Called when the main loop's thread should be notified that there's now work to do.
void dbus_connection_set_allow_anonymous(DBusConnection *connection, dbus_bool_t value)
This function must be called on the server side of a connection when the connection is first seen in ...
dbus_bool_t dbus_connection_add_filter(DBusConnection *connection, DBusHandleMessageFunction function, void *user_data, DBusFreeFunction free_data_function)
Adds a message filter.
dbus_bool_t dbus_connection_send(DBusConnection *connection, DBusMessage *message, dbus_uint32_t *serial)
Adds a message to the outgoing message queue.
DBusConnection * dbus_connection_ref(DBusConnection *connection)
Increments the reference count of a DBusConnection.
char * dbus_connection_get_server_id(DBusConnection *connection)
Gets the ID of the server address we are authenticated to, if this connection is on the client side.
dbus_bool_t(* DBusAllowWindowsUserFunction)(DBusConnection *connection, const char *user_sid, void *data)
Called during authentication to check whether the given Windows user ID is allowed to connect,...
dbus_bool_t dbus_connection_set_watch_functions(DBusConnection *connection, DBusAddWatchFunction add_function, DBusRemoveWatchFunction remove_function, DBusWatchToggledFunction toggled_function, void *data, DBusFreeFunction free_data_function)
Sets the watch functions for the connection.
void(* DBusRemoveTimeoutFunction)(DBusTimeout *timeout, void *data)
Called when libdbus no longer needs a timeout to be monitored by the main loop.
dbus_bool_t dbus_connection_get_unix_process_id(DBusConnection *connection, unsigned long *pid)
Gets the process ID of the connection if any.
dbus_bool_t dbus_connection_get_unix_user(DBusConnection *connection, unsigned long *uid)
Gets the UNIX user ID of the connection if known.
void dbus_connection_set_route_peer_messages(DBusConnection *connection, dbus_bool_t value)
Normally DBusConnection automatically handles all messages to the org.freedesktop....
@ DBUS_DISPATCH_NEED_MEMORY
More memory is needed to continue.
@ DBUS_DISPATCH_COMPLETE
All currently available data has been processed.
@ DBUS_DISPATCH_DATA_REMAINS
There is more data to potentially convert to messages.
void _dbus_data_slot_allocator_free(DBusDataSlotAllocator *allocator, dbus_int32_t *slot_id_p)
Deallocates an ID previously allocated with _dbus_data_slot_allocator_alloc().
void _dbus_data_slot_list_init(DBusDataSlotList *list)
Initializes a slot list.
void _dbus_data_slot_list_free(DBusDataSlotList *list)
Frees the data slot list and all data slots contained in it, calling application-provided free functi...
void * _dbus_data_slot_list_get(DBusDataSlotAllocator *allocator, DBusDataSlotList *list, int slot)
Retrieves data previously set with _dbus_data_slot_list_set_data().
dbus_bool_t _dbus_data_slot_list_set(DBusDataSlotAllocator *allocator, DBusDataSlotList *list, int slot, void *data, DBusFreeFunction free_data_func, DBusFreeFunction *old_free_func, void **old_data)
Stores a pointer in the data slot list, along with an optional function to be used for freeing the da...
dbus_bool_t _dbus_data_slot_allocator_alloc(DBusDataSlotAllocator *allocator, dbus_int32_t *slot_id_p)
Allocates an integer ID to be used for storing data in a DBusDataSlotList.
Definition: dbus-dataslot.c:69
#define DBUS_ERROR_INIT
Expands to a suitable initializer for a DBusError on the stack.
Definition: dbus-errors.h:62
void dbus_move_error(DBusError *src, DBusError *dest)
Moves an error src into dest, freeing src and overwriting dest.
Definition: dbus-errors.c:279
dbus_bool_t dbus_error_has_name(const DBusError *error, const char *name)
Checks whether the error is set and has the given name.
Definition: dbus-errors.c:302
void dbus_set_error(DBusError *error, const char *name, const char *format,...)
Assigns an error name and message to a DBusError.
Definition: dbus-errors.c:354
void dbus_error_free(DBusError *error)
Frees an error that's been set (or just initialized), then reinitializes the error as in dbus_error_i...
Definition: dbus-errors.c:211
int _dbus_hash_table_get_n_entries(DBusHashTable *table)
Gets the number of hash entries in a hash table.
Definition: dbus-hash.c:1407
void * _dbus_hash_iter_get_value(DBusHashIter *iter)
Gets the value of the current entry.
Definition: dbus-hash.c:613
dbus_bool_t _dbus_hash_table_insert_int(DBusHashTable *table, int key, void *value)
Creates a hash entry with the given key and value.
Definition: dbus-hash.c:1258
dbus_bool_t _dbus_hash_table_insert_string(DBusHashTable *table, char *key, void *value)
Creates a hash entry with the given key and value.
Definition: dbus-hash.c:1224
void _dbus_hash_table_unref(DBusHashTable *table)
Decrements the reference count for a hash table, freeing the hash table if the count reaches zero.
Definition: dbus-hash.c:361
dbus_bool_t _dbus_hash_iter_next(DBusHashIter *iter)
Move the hash iterator forward one step, to the next hash entry.
Definition: dbus-hash.c:543
void _dbus_hash_iter_init(DBusHashTable *table, DBusHashIter *iter)
Initializes a hash table iterator.
Definition: dbus-hash.c:517
DBusHashTable * _dbus_hash_table_new(DBusHashType type, DBusFreeFunction key_free_function, DBusFreeFunction value_free_function)
Constructs a new hash table.
Definition: dbus-hash.c:285
dbus_bool_t _dbus_hash_table_remove_int(DBusHashTable *table, int key)
Removes the hash entry for the given key.
Definition: dbus-hash.c:1161
dbus_bool_t _dbus_hash_table_remove_string(DBusHashTable *table, const char *key)
Removes the hash entry for the given key.
Definition: dbus-hash.c:1133
void * _dbus_hash_table_lookup_string(DBusHashTable *table, const char *key)
Looks up the value for a given string in a hash table of type DBUS_HASH_STRING.
Definition: dbus-hash.c:1059
void _dbus_hash_iter_remove_entry(DBusHashIter *iter)
Removes the current entry from the hash table.
Definition: dbus-hash.c:592
void * _dbus_hash_table_lookup_int(DBusHashTable *table, int key)
Looks up the value for a given integer in a hash table of type DBUS_HASH_INT.
Definition: dbus-hash.c:1084
@ DBUS_HASH_INT
Hash keys are integers.
Definition: dbus-hash.h:70
@ DBUS_HASH_STRING
Hash keys are strings.
Definition: dbus-hash.h:69
#define _dbus_assert_not_reached(explanation)
Aborts with an error message if called.
#define _dbus_assert(condition)
Aborts with an error message if the condition is false.
#define _DBUS_UNLOCK(name)
Unlocks a global lock.
#define _DBUS_LOCK(name)
Locks a global lock, initializing it first if necessary.
void _dbus_warn_check_failed(const char *format,...)
Prints a "critical" warning to stderr when an assertion fails; differs from _dbus_warn primarily in t...
void(* DBusForeachFunction)(void *element, void *data)
Used to iterate over each item in a collection, such as a DBusList.
char * _dbus_strdup(const char *str)
Duplicates a string.
dbus_bool_t _dbus_get_local_machine_uuid_encoded(DBusString *uuid_str, DBusError *error)
Gets the hex-encoded UUID of the machine this function is executed on.
void _dbus_warn(const char *format,...)
Prints a warning message to stderr.
#define _DBUS_LOCK_NAME(name)
Expands to name of a global lock variable.
DBusList * _dbus_list_get_first_link(DBusList **list)
Gets the first link in the list.
Definition: dbus-list.c:567
dbus_bool_t _dbus_list_copy(DBusList **list, DBusList **dest)
Copies a list.
Definition: dbus-list.c:697
DBusList * _dbus_list_pop_first_link(DBusList **list)
Removes the first link in the list and returns it.
Definition: dbus-list.c:628
void * _dbus_list_get_last(DBusList **list)
Gets the last data in the list.
Definition: dbus-list.c:596
dbus_bool_t _dbus_list_remove(DBusList **list, void *data)
Removes a value from the list.
Definition: dbus-list.c:415
void _dbus_list_append_link(DBusList **list, DBusList *link)
Appends a link to the list.
Definition: dbus-list.c:315
void _dbus_list_remove_link(DBusList **list, DBusList *link)
Removes a link from the list.
Definition: dbus-list.c:527
void * _dbus_list_get_first(DBusList **list)
Gets the first data in the list.
Definition: dbus-list.c:612
DBusList * _dbus_list_get_last_link(DBusList **list)
Gets the last link in the list.
Definition: dbus-list.c:580
void _dbus_list_unlink(DBusList **list, DBusList *link)
Removes the given link from the list, but doesn't free it.
Definition: dbus-list.c:499
#define _dbus_list_get_prev_link(list, link)
Gets the previous link in the list, or NULL if there are no more links.
Definition: dbus-list.h:117
void _dbus_list_free_link(DBusList *link)
Frees a linked list node allocated with _dbus_list_alloc_link.
Definition: dbus-list.c:254
void * _dbus_list_pop_first(DBusList **list)
Removes the first value in the list and returns it.
Definition: dbus-list.c:649
void _dbus_list_foreach(DBusList **list, DBusForeachFunction function, void *data)
Calls the given function for each element in the list.
Definition: dbus-list.c:759
void _dbus_list_clear(DBusList **list)
Frees all links in the list and sets the list head to NULL.
Definition: dbus-list.c:542
void _dbus_list_prepend_link(DBusList **list, DBusList *link)
Prepends a link to the list.
Definition: dbus-list.c:333
dbus_bool_t _dbus_list_prepend(DBusList **list, void *data)
Prepends a value to the list.
Definition: dbus-list.c:292
DBusList * _dbus_list_alloc_link(void *data)
Allocates a linked list node.
Definition: dbus-list.c:242
dbus_bool_t _dbus_list_append(DBusList **list, void *data)
Appends a value to the list.
Definition: dbus-list.c:270
#define _dbus_list_get_next_link(list, link)
Gets the next link in the list, or NULL if there are no more links.
Definition: dbus-list.h:116
#define NULL
A null pointer, defined appropriately for C or C++.
#define TRUE
Expands to "1".
#define FALSE
Expands to "0".
int _dbus_current_generation
_dbus_current_generation is used to track each time that dbus_shutdown() is called,...
Definition: dbus-memory.c:782
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_register_shutdown_func(DBusShutdownFunction function, void *data)
Register a cleanup function to be called exactly once the next time dbus_shutdown() is called.
Definition: dbus-memory.c:811
void(* DBusFreeFunction)(void *memory)
The type of a function which frees a block of memory.
Definition: dbus-memory.h:63
void dbus_free(void *memory)
Frees a block of memory previously allocated by dbus_malloc() or dbus_malloc0().
Definition: dbus-memory.c:702
#define dbus_new(type, count)
Safe macro for using dbus_malloc().
Definition: dbus-memory.h:57
#define dbus_new0(type, count)
Safe macro for using dbus_malloc0().
Definition: dbus-memory.h:58
void dbus_free_string_array(char **str_array)
Frees a NULL-terminated array of strings.
Definition: dbus-memory.c:750
void dbus_message_set_serial(DBusMessage *message, dbus_uint32_t serial)
Sets the serial number of a message.
Definition: dbus-message.c:277
void dbus_message_lock(DBusMessage *message)
Locks a message.
Definition: dbus-message.c:407
const char * dbus_message_type_to_string(int type)
Utility function to convert a D-Bus message type into a machine-readable string (not translated).
void _dbus_message_remove_counter(DBusMessage *message, DBusCounter *counter)
Removes a counter tracking the size/unix fds of this message, and decrements the counter by the size/...
Definition: dbus-message.c:375
void _dbus_message_add_counter_link(DBusMessage *message, DBusList *link)
Adds a counter to be incremented immediately with the size/unix fds of this message,...
Definition: dbus-message.c:303
dbus_bool_t dbus_message_has_interface(DBusMessage *message, const char *iface)
Checks if the message has an interface.
void dbus_message_set_no_reply(DBusMessage *message, dbus_bool_t no_reply)
Sets a flag indicating that the message does not want a reply; if this flag is set,...
dbus_bool_t dbus_message_iter_append_basic(DBusMessageIter *iter, int type, const void *value)
Appends a basic-typed value to the message.
const char * dbus_message_get_path(DBusMessage *message)
Gets the object path this message is being sent to (for DBUS_MESSAGE_TYPE_METHOD_CALL) or being emitt...
const char * dbus_message_get_interface(DBusMessage *message)
Gets the interface this message is being sent to (for DBUS_MESSAGE_TYPE_METHOD_CALL) or being emitted...
DBusMessage * dbus_message_new_error(DBusMessage *reply_to, const char *error_name, const char *error_message)
Creates a new message that is an error reply to another message.
dbus_uint32_t dbus_message_get_serial(DBusMessage *message)
Returns the serial of a message or 0 if none has been specified.
int dbus_message_get_type(DBusMessage *message)
Gets the type of a message.
dbus_bool_t dbus_message_append_args(DBusMessage *message, int first_arg_type,...)
Appends fields to a message given a variable argument list.
DBusMessage * dbus_message_new_signal(const char *path, const char *iface, const char *name)
Constructs a new message representing a signal emission.
DBusMessage * dbus_message_ref(DBusMessage *message)
Increments the reference count of a DBusMessage.
dbus_bool_t dbus_message_set_error_name(DBusMessage *message, const char *error_name)
Sets the name of the error (DBUS_MESSAGE_TYPE_ERROR).
dbus_uint32_t dbus_message_get_reply_serial(DBusMessage *message)
Returns the serial that the message is a reply to or 0 if none.
DBusMessage * dbus_message_new_method_return(DBusMessage *method_call)
Constructs a message that is a reply to a method call.
const char * dbus_message_get_destination(DBusMessage *message)
Gets the destination of a message or NULL if there is none set.
void dbus_message_unref(DBusMessage *message)
Decrements the reference count of a DBusMessage, freeing the message if the count reaches 0.
DBusMessage * dbus_message_new(int message_type)
Constructs a new message of the given message type.
dbus_bool_t dbus_set_error_from_message(DBusError *error, DBusMessage *message)
Sets a DBusError based on the contents of the given message.
dbus_bool_t dbus_message_is_method_call(DBusMessage *message, const char *iface, const char *method)
Checks whether the message is a method call with the given interface and member fields.
dbus_bool_t dbus_message_set_reply_serial(DBusMessage *message, dbus_uint32_t reply_serial)
Sets the reply serial of a message (the serial of the message this is a reply to).
dbus_bool_t dbus_message_is_signal(DBusMessage *message, const char *iface, const char *signal_name)
Checks whether the message is a signal with the given interface and member fields.
const char * dbus_message_get_signature(DBusMessage *message)
Gets the type signature of the message, i.e.
const char * dbus_message_get_member(DBusMessage *message)
Gets the interface member being invoked (DBUS_MESSAGE_TYPE_METHOD_CALL) or emitted (DBUS_MESSAGE_TYPE...
void dbus_message_iter_init_append(DBusMessage *message, DBusMessageIter *iter)
Initializes a DBusMessageIter for appending arguments to the end of a message.
void _dbus_object_tree_free_all_unlocked(DBusObjectTree *tree)
Free all the handlers in the tree.
void _dbus_object_tree_unregister_and_unlock(DBusObjectTree *tree, const char **path)
Unregisters an object subtree that was registered with the same path.
void _dbus_object_tree_unref(DBusObjectTree *tree)
Decrement the reference count.
dbus_bool_t _dbus_object_tree_list_registered_and_unlock(DBusObjectTree *tree, const char **parent_path, char ***child_entries)
Lists the registered fallback handlers and object path handlers at the given parent_path.
dbus_bool_t _dbus_decompose_path(const char *data, int len, char ***path, int *path_len)
Decompose an object path.
dbus_bool_t _dbus_object_tree_register(DBusObjectTree *tree, dbus_bool_t fallback, const char **path, const DBusObjectPathVTable *vtable, void *user_data, DBusError *error)
Registers a new subtree in the global object tree.
void * _dbus_object_tree_get_user_data_unlocked(DBusObjectTree *tree, const char **path)
Looks up the data passed to _dbus_object_tree_register() for a handler at the given path.
DBusHandlerResult _dbus_object_tree_dispatch_and_unlock(DBusObjectTree *tree, DBusMessage *message, dbus_bool_t *found_object)
Tries to dispatch a message by directing it to handler for the object path listed in the message head...
DBusObjectTree * _dbus_object_tree_new(DBusConnection *connection)
Creates a new object tree, representing a mapping from paths to handler vtables.
void _dbus_pending_call_finish_completion(DBusPendingCall *pending)
Call the notifier function for the pending call.
DBusConnection * _dbus_pending_call_get_connection_and_lock(DBusPendingCall *pending)
Gets the connection associated with this pending call.
DBUS_PRIVATE_EXPORT DBusPendingCall * _dbus_pending_call_ref_unlocked(DBusPendingCall *pending)
Increments the reference count on a pending call, while the lock on its connection is already held.
void _dbus_pending_call_queue_timeout_error_unlocked(DBusPendingCall *pending, DBusConnection *connection)
If the pending call hasn't been timed out, add its timeout error reply to the connection's incoming m...
DBUS_PRIVATE_EXPORT void _dbus_pending_call_unref_and_unlock(DBusPendingCall *pending)
Decrements the reference count on a pending call, freeing it if the count reaches 0.
dbus_bool_t _dbus_pending_call_get_completed_unlocked(DBusPendingCall *pending)
Checks whether the pending call has received a reply yet, or not.
void _dbus_pending_call_set_reply_unlocked(DBusPendingCall *pending, DBusMessage *message)
Sets the reply of a pending call with the given message, or if the message is NULL,...
DBUS_PRIVATE_EXPORT DBusPendingCall * _dbus_pending_call_new_unlocked(DBusConnection *connection, int timeout_milliseconds, DBusTimeoutHandler timeout_handler)
Creates a new pending reply object.
dbus_bool_t _dbus_pending_call_set_timeout_error_unlocked(DBusPendingCall *pending, DBusMessage *message, dbus_uint32_t serial)
Sets the reply message associated with the pending call to a timeout error.
#define CONNECTION_LOCK(connection)
Internals of DBusPendingCall.
#define CONNECTION_UNLOCK(connection)
shorter and more visible way to write _dbus_connection_unlock()
void _dbus_pending_call_start_completion_unlocked(DBusPendingCall *pending)
Sets the pending call to completed.
dbus_bool_t _dbus_pending_call_is_timeout_added_unlocked(DBusPendingCall *pending)
Checks to see if a timeout has been added.
dbus_uint32_t _dbus_pending_call_get_reply_serial_unlocked(DBusPendingCall *pending)
Gets the reply's serial number.
DBusConnection * _dbus_pending_call_get_connection_unlocked(DBusPendingCall *pending)
Gets the connection associated with this pending call.
DBusTimeout * _dbus_pending_call_get_timeout_unlocked(DBusPendingCall *pending)
Retrives the timeout.
void _dbus_pending_call_set_timeout_added_unlocked(DBusPendingCall *pending, dbus_bool_t is_added)
Sets wether the timeout has been added.
DBusPendingCall * dbus_pending_call_ref(DBusPendingCall *pending)
Increments the reference count on a pending call.
DBusMessage * dbus_pending_call_steal_reply(DBusPendingCall *pending)
Gets the reply, or returns NULL if none has been received yet.
void dbus_pending_call_block(DBusPendingCall *pending)
Block until the pending call is completed.
dbus_bool_t dbus_pending_call_get_completed(DBusPendingCall *pending)
Checks whether the pending call has received a reply yet, or not.
void dbus_pending_call_unref(DBusPendingCall *pending)
Decrements the reference count on a pending call, freeing it if the count reaches 0.
#define DBUS_MESSAGE_TYPE_METHOD_CALL
Message type of a method call message, see dbus_message_get_type()
#define DBUS_MESSAGE_TYPE_ERROR
Message type of an error reply message, see dbus_message_get_type()
#define DBUS_ERROR_UNKNOWN_METHOD
Method name you invoked isn't known by the object you invoked it on.
#define DBUS_TYPE_UNIX_FD
Type code marking a unix file descriptor.
#define DBUS_ERROR_OBJECT_PATH_IN_USE
There's already an object with the requested object path.
#define DBUS_MESSAGE_TYPE_SIGNAL
Message type of a signal message, see dbus_message_get_type()
#define DBUS_TYPE_STRING
Type code marking a UTF-8 encoded, nul-terminated Unicode string.
#define DBUS_ERROR_UNKNOWN_OBJECT
Object you invoked a method on isn't known.
#define DBUS_TYPE_INVALID
Type code that is never equal to a legitimate type code.
Definition: dbus-protocol.h:60
#define DBUS_ERROR_FAILED
A generic error; "something went wrong" - see the error message for more.
#define DBUS_ERROR_NO_MEMORY
There was not enough memory to complete an operation.
#define DBUS_ERROR_DISCONNECTED
The connection is disconnected and you're trying to use it.
DBusCounter * _dbus_counter_new(void)
Creates a new DBusCounter.
long _dbus_counter_get_unix_fd_value(DBusCounter *counter)
Gets the current value of the unix fd counter.
void _dbus_counter_unref(DBusCounter *counter)
Decrements refcount of the counter and possibly finalizes the counter.
long _dbus_counter_get_size_value(DBusCounter *counter)
Gets the current value of the size counter.
DBusCounter * _dbus_counter_ref(DBusCounter *counter)
Increments refcount of the counter.
DBusHandlerResult
Results that a message handler can return.
Definition: dbus-shared.h:67
#define DBUS_PATH_LOCAL
The object path used in local/in-process-generated messages.
Definition: dbus-shared.h:82
#define DBUS_INTERFACE_LOCAL
This is a special interface whose methods can only be invoked by the local implementation (messages f...
Definition: dbus-shared.h:105
#define DBUS_INTERFACE_PEER
The interface supported by most dbus peers.
Definition: dbus-shared.h:99
@ DBUS_HANDLER_RESULT_NEED_MEMORY
Need more memory in order to return DBUS_HANDLER_RESULT_HANDLED or DBUS_HANDLER_RESULT_NOT_YET_HANDLE...
Definition: dbus-shared.h:70
@ DBUS_HANDLER_RESULT_HANDLED
Message has had its effect - no need to run more handlers.
Definition: dbus-shared.h:68
@ DBUS_HANDLER_RESULT_NOT_YET_HANDLED
Message has not had any effect - see if other handlers want it.
Definition: dbus-shared.h:69
dbus_bool_t dbus_type_is_valid(int typecode)
Return TRUE if the argument is a valid typecode.
dbus_bool_t _dbus_string_init(DBusString *str)
Initializes a string.
Definition: dbus-string.c:175
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init().
Definition: dbus-string.c:259
dbus_bool_t _dbus_string_append_printf(DBusString *str, const char *format,...)
Appends a printf-style formatted string to the DBusString.
Definition: dbus-string.c:1114
void _dbus_exit(int code)
Exit the process, returning the given value.
dbus_int32_t _dbus_atomic_dec(DBusAtomic *atomic)
Atomically decrement an integer.
dbus_int32_t _dbus_atomic_get(DBusAtomic *atomic)
Atomically get the value of an integer.
void _dbus_disable_sigpipe(void)
signal (SIGPIPE, SIG_IGN);
void _dbus_sleep_milliseconds(int milliseconds)
Sleeps the given number of milliseconds.
dbus_int32_t _dbus_atomic_inc(DBusAtomic *atomic)
Atomically increments an integer.
void _dbus_get_monotonic_time(long *tv_sec, long *tv_usec)
Get current time, as in gettimeofday().
void _dbus_rmutex_new_at_location(DBusRMutex **location_p)
Creates a new mutex or creates a no-op mutex if threads are not initialized.
Definition: dbus-threads.c:53
void _dbus_cmutex_free_at_location(DBusCMutex **location_p)
Frees a DBusCMutex; does nothing if passed a NULL pointer.
Definition: dbus-threads.c:107
void _dbus_condvar_free_at_location(DBusCondVar **location_p)
Frees a condition variable; does nothing if passed a NULL pointer.
Definition: dbus-threads.c:224
DBUS_PRIVATE_EXPORT void _dbus_rmutex_unlock(DBusRMutex *mutex)
Unlocks a mutex.
Definition: dbus-threads.c:150
void _dbus_condvar_wait(DBusCondVar *cond, DBusCMutex *mutex)
Atomically unlocks the mutex and waits for the conditions variable to be signalled.
Definition: dbus-threads.c:240
void _dbus_condvar_new_at_location(DBusCondVar **location_p)
This does the same thing as _dbus_condvar_new.
Definition: dbus-threads.c:199
void _dbus_cmutex_new_at_location(DBusCMutex **location_p)
Creates a new mutex or creates a no-op mutex if threads are not initialized.
Definition: dbus-threads.c:77
void _dbus_condvar_wake_one(DBusCondVar *cond)
If there are threads waiting on the condition variable, wake up exactly one.
Definition: dbus-threads.c:278
dbus_bool_t _dbus_condvar_wait_timeout(DBusCondVar *cond, DBusCMutex *mutex, int timeout_milliseconds)
Atomically unlocks the mutex and waits for the conditions variable to be signalled,...
Definition: dbus-threads.c:261
void _dbus_cmutex_lock(DBusCMutex *mutex)
Locks a mutex.
Definition: dbus-threads.c:136
void _dbus_cmutex_unlock(DBusCMutex *mutex)
Unlocks a mutex.
Definition: dbus-threads.c:164
void _dbus_rmutex_free_at_location(DBusRMutex **location_p)
Frees a DBusRMutex; does nothing if passed a NULL pointer.
Definition: dbus-threads.c:94
struct DBusMutex DBusMutex
An opaque mutex type provided by the DBusThreadFunctions implementation installed by dbus_threads_ini...
Definition: dbus-threads.h:41
dbus_bool_t _dbus_timeout_list_add_timeout(DBusTimeoutList *timeout_list, DBusTimeout *timeout)
Adds a new timeout to the timeout list, invoking the application DBusAddTimeoutFunction if appropriat...
Definition: dbus-timeout.c:314
void _dbus_timeout_list_free(DBusTimeoutList *timeout_list)
Frees a DBusTimeoutList.
Definition: dbus-timeout.c:215
void _dbus_timeout_list_toggle_timeout(DBusTimeoutList *timeout_list, DBusTimeout *timeout, dbus_bool_t enabled)
Sets a timeout to the given enabled state, invoking the application's DBusTimeoutToggledFunction if a...
Definition: dbus-timeout.c:366
DBusTimeoutList * _dbus_timeout_list_new(void)
Creates a new timeout list.
Definition: dbus-timeout.c:198
dbus_bool_t _dbus_timeout_list_set_functions(DBusTimeoutList *timeout_list, DBusAddTimeoutFunction add_function, DBusRemoveTimeoutFunction remove_function, DBusTimeoutToggledFunction toggled_function, void *data, DBusFreeFunction free_data_function)
Sets the timeout functions.
Definition: dbus-timeout.c:243
void _dbus_timeout_list_remove_timeout(DBusTimeoutList *timeout_list, DBusTimeout *timeout)
Removes a timeout from the timeout list, invoking the application's DBusRemoveTimeoutFunction if appr...
Definition: dbus-timeout.c:344
DBUS_EXPORT int dbus_timeout_get_interval(DBusTimeout *timeout)
Gets the timeout interval.
Definition: dbus-timeout.c:444
void _dbus_transport_set_max_message_size(DBusTransport *transport, long size)
See dbus_connection_set_max_message_size().
void _dbus_transport_set_max_received_size(DBusTransport *transport, long size)
See dbus_connection_set_max_received_size().
DBusDispatchStatus _dbus_transport_get_dispatch_status(DBusTransport *transport)
Reports our current dispatch status (whether there's buffered data to be queued as messages,...
int _dbus_transport_get_pending_fds_count(DBusTransport *transport)
Return how many file descriptors are pending in the loader.
dbus_bool_t _dbus_transport_get_adt_audit_session_data(DBusTransport *transport, void **data, int *data_size)
See dbus_connection_get_adt_audit_session_data().
dbus_bool_t _dbus_transport_get_windows_user(DBusTransport *transport, char **windows_sid_p)
See dbus_connection_get_windows_user().
dbus_bool_t _dbus_transport_queue_messages(DBusTransport *transport)
Processes data we've read while handling a watch, potentially converting some of it to messages and q...
dbus_bool_t _dbus_transport_get_socket_fd(DBusTransport *transport, DBusSocket *fd_p)
Get the socket file descriptor, if any.
const char * _dbus_transport_get_address(DBusTransport *transport)
Gets the address of a transport.
dbus_bool_t _dbus_transport_handle_watch(DBusTransport *transport, DBusWatch *watch, unsigned int condition)
Handles a watch by reading data, writing data, or disconnecting the transport, as appropriate for the...
DBusTransport * _dbus_transport_ref(DBusTransport *transport)
Increments the reference count for the transport.
dbus_bool_t _dbus_transport_peek_is_authenticated(DBusTransport *transport)
Returns TRUE if we have been authenticated.
void _dbus_transport_set_allow_anonymous(DBusTransport *transport, dbus_bool_t value)
See dbus_connection_set_allow_anonymous()
void _dbus_transport_disconnect(DBusTransport *transport)
Closes our end of the connection to a remote application.
long _dbus_transport_get_max_received_size(DBusTransport *transport)
See dbus_connection_get_max_received_size().
dbus_bool_t _dbus_transport_set_connection(DBusTransport *transport, DBusConnection *connection)
Sets the connection using this transport.
void _dbus_transport_set_unix_user_function(DBusTransport *transport, DBusAllowUnixUserFunction function, void *data, DBusFreeFunction free_data_function, void **old_data, DBusFreeFunction *old_free_data_function)
See dbus_connection_set_unix_user_function().
long _dbus_transport_get_max_message_unix_fds(DBusTransport *transport)
See dbus_connection_get_max_message_unix_fds().
void _dbus_transport_set_max_received_unix_fds(DBusTransport *transport, long n)
See dbus_connection_set_max_received_unix_fds().
void _dbus_transport_unref(DBusTransport *transport)
Decrements the reference count for the transport.
dbus_bool_t _dbus_transport_can_pass_unix_fd(DBusTransport *transport)
Returns TRUE if the transport supports sending unix fds.
dbus_bool_t _dbus_transport_try_to_authenticate(DBusTransport *transport)
Returns TRUE if we have been authenticated.
void _dbus_transport_do_iteration(DBusTransport *transport, unsigned int flags, int timeout_milliseconds)
Performs a single poll()/select() on the transport's file descriptors and then reads/writes data as a...
long _dbus_transport_get_max_received_unix_fds(DBusTransport *transport)
See dbus_connection_set_max_received_unix_fds().
dbus_bool_t _dbus_transport_get_is_connected(DBusTransport *transport)
Returns TRUE if the transport has not been disconnected.
void _dbus_transport_set_max_message_unix_fds(DBusTransport *transport, long n)
See dbus_connection_set_max_message_unix_fds().
void _dbus_transport_set_pending_fds_function(DBusTransport *transport, void(*callback)(void *), void *data)
Register a function to be called whenever the number of pending file descriptors in the loader change...
void _dbus_transport_set_windows_user_function(DBusTransport *transport, DBusAllowWindowsUserFunction function, void *data, DBusFreeFunction free_data_function, void **old_data, DBusFreeFunction *old_free_data_function)
See dbus_connection_set_windows_user_function().
long _dbus_transport_get_max_message_size(DBusTransport *transport)
See dbus_connection_get_max_message_size().
dbus_bool_t _dbus_transport_get_unix_process_id(DBusTransport *transport, unsigned long *pid)
See dbus_connection_get_unix_process_id().
DBusTransport * _dbus_transport_open(DBusAddressEntry *entry, DBusError *error)
Try to open a new transport for the given address entry.
const char * _dbus_transport_get_server_id(DBusTransport *transport)
Gets the id of the server we are connected to (see dbus_server_get_id()).
dbus_bool_t _dbus_transport_get_is_anonymous(DBusTransport *transport)
See dbus_connection_get_is_anonymous().
dbus_bool_t _dbus_transport_get_unix_user(DBusTransport *transport, unsigned long *uid)
See dbus_connection_get_unix_user().
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE.
Definition: dbus-types.h:35
int dbus_int32_t
A 32-bit signed integer on all platforms.
unsigned int dbus_uint32_t
A 32-bit unsigned integer on all platforms.
dbus_bool_t _dbus_watch_list_add_watch(DBusWatchList *watch_list, DBusWatch *watch)
Adds a new watch to the watch list, invoking the application DBusAddWatchFunction if appropriate.
Definition: dbus-watch.c:382
void _dbus_watch_list_toggle_watch(DBusWatchList *watch_list, DBusWatch *watch, dbus_bool_t enabled)
Sets a watch to the given enabled state, invoking the application's DBusWatchToggledFunction if appro...
Definition: dbus-watch.c:442
DBusWatchList * _dbus_watch_list_new(void)
Creates a new watch list.
Definition: dbus-watch.c:232
void _dbus_watch_list_free(DBusWatchList *watch_list)
Frees a DBusWatchList.
Definition: dbus-watch.c:249
dbus_bool_t _dbus_watch_list_set_functions(DBusWatchList *watch_list, DBusAddWatchFunction add_function, DBusRemoveWatchFunction remove_function, DBusWatchToggledFunction toggled_function, void *data, DBusFreeFunction free_data_function)
Sets the watch functions.
Definition: dbus-watch.c:296
void _dbus_watch_list_remove_watch(DBusWatchList *watch_list, DBusWatch *watch)
Removes a watch from the watch list, invoking the application's DBusRemoveWatchFunction if appropriat...
Definition: dbus-watch.c:415
Internals of DBusAddressEntry.
Definition: dbus-address.c:44
An atomic integer safe to increment or decrement from multiple threads.
Definition: dbus-sysdeps.h:307
Implementation details of DBusConnection.
void * dispatch_status_data
Application data for dispatch_status_function.
int n_outgoing
Length of outgoing queue.
DBusDataSlotList slot_list
Data stored by allocated integer ID.
dbus_bool_t dispatch_acquired
Someone has dispatch path (can drain incoming queue)
DBusCondVar * dispatch_cond
Notify when dispatch_acquired is available.
DBusWakeupMainFunction wakeup_main_function
Function to wake up the mainloop
unsigned int exit_on_disconnect
If TRUE, exit after handling disconnect signal.
DBusList * filter_list
List of filters.
unsigned int have_connection_lock
Used to check locking.
unsigned int disconnected_message_processed
We did our default handling of the disconnected message, such as closing the connection.
dbus_uint32_t client_serial
Client serial.
unsigned int disconnected_message_arrived
We popped or are dispatching the disconnected message.
DBusCounter * outgoing_counter
Counts size of outgoing messages.
DBusCondVar * io_path_cond
Notify when io_path_acquired is available.
DBusAtomic refcount
Reference count.
DBusList * outgoing_messages
Queue of messages we need to send, send the end of the list first.
DBusFreeFunction free_dispatch_status_data
free dispatch_status_data
DBusRMutex * slot_mutex
Lock on slot_list so overall connection lock need not be taken.
DBusFreeFunction free_wakeup_main_data
free wakeup_main_data
DBusTransport * transport
Object that sends/receives messages over network.
DBusRMutex * mutex
Lock on the entire DBusConnection.
int n_incoming
Length of incoming queue.
dbus_bool_t io_path_acquired
Someone has transport io path (can use the transport to read/write messages)
DBusList * disconnect_message_link
Preallocated list node for queueing the disconnection message.
DBusCMutex * io_path_mutex
Protects io_path_acquired.
DBusList * incoming_messages
Queue of messages we have received, end of the list received most recently.
unsigned int shareable
TRUE if libdbus owns a reference to the connection and can return it from dbus_connection_open() more...
unsigned int route_peer_messages
If TRUE, if org.freedesktop.DBus.Peer messages have a bus name, don't handle them automatically.
DBusWatchList * watches
Stores active watches.
void * wakeup_main_data
Application data for wakeup_main_function.
DBusObjectTree * objects
Object path handlers registered with this connection.
char * server_guid
GUID of server if we are in shared_connections, NULL if server GUID is unknown or connection is priva...
DBusHashTable * pending_replies
Hash of message serials to DBusPendingCall.
DBusCMutex * dispatch_mutex
Protects dispatch_acquired.
DBusMessage * message_borrowed
Filled in if the first incoming message has been borrowed; dispatch_acquired will be set by the borro...
DBusTimeoutList * timeouts
Stores active timeouts.
DBusDispatchStatus last_dispatch_status
The last dispatch status we reported to the application.
DBusDispatchStatusFunction dispatch_status_function
Function on dispatch status changes
DBusList * expired_messages
Messages that will be released when we next unlock.
Internals of DBusCounter.
An allocator that tracks a set of slot IDs.
Definition: dbus-dataslot.h:56
Data structure that stores the actual user data set at a given slot.
Definition: dbus-dataslot.h:70
Object representing an exception.
Definition: dbus-errors.h:49
const char * name
public error name field
Definition: dbus-errors.h:50
const char * message
public error message field
Definition: dbus-errors.h:51
Hash iterator object.
Definition: dbus-hash.h:50
Internals of DBusHashTable.
Definition: dbus-hash.c:168
A node in a linked list.
Definition: dbus-list.h:35
void * data
Data stored at this element.
Definition: dbus-list.h:38
Internal struct representing a message filter function.
DBusAtomic refcount
Reference count.
DBusHandleMessageFunction function
Function to call to filter.
void * user_data
User data for the function.
DBusFreeFunction free_user_data_function
Function to free the user data.
DBusMessageIter struct; contains no public fields.
Definition: dbus-message.h:62
Internals of DBusMessage.
Virtual table that must be implemented to handle a portion of the object path hierarchy.
Internals of DBusObjectTree.
Implementation details of DBusPendingCall - all fields are private.
Internals of DBusPreallocatedSend.
DBusConnection * connection
Connection we'd send the message to.
DBusList * counter_link
Preallocated link in the resource counter.
DBusList * queue_link
Preallocated link in the queue.
Socket interface.
Definition: dbus-sysdeps.h:175
DBusTimeoutList implementation details.
Definition: dbus-timeout.c:181
Internals of DBusTimeout.
Definition: dbus-timeout.c:41
Object representing a transport such as a socket.
DBusWatchList implementation details.
Definition: dbus-watch.c:215
Implementation of DBusWatch.
Definition: dbus-watch.c:41