D-Bus 1.15.2
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 DBusAtomic _dbus_modify_sigpipe = { FALSE };
249#else
250static DBusAtomic _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_atomic_get (&_dbus_modify_sigpipe) != 0)
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
2773
2774 _dbus_transport_unref (connection->transport);
2775
2776 if (connection->disconnect_message_link)
2777 {
2778 DBusMessage *message = connection->disconnect_message_link->data;
2779 dbus_message_unref (message);
2781 }
2782
2785
2788
2790
2791 _dbus_rmutex_free_at_location (&connection->mutex);
2792
2793 dbus_free (connection);
2794}
2795
2815void
2817{
2818 dbus_int32_t old_refcount;
2819
2820 _dbus_return_if_fail (connection != NULL);
2821 _dbus_return_if_fail (connection->generation == _dbus_current_generation);
2822
2823 old_refcount = _dbus_atomic_dec (&connection->refcount);
2824
2825 _dbus_connection_trace_ref (connection, old_refcount, old_refcount - 1,
2826 "unref");
2827
2828 if (old_refcount == 1)
2829 {
2830#ifndef DBUS_DISABLE_CHECKS
2832 {
2833 _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",
2834 connection->shareable ?
2835 "Most likely, the application called unref() too many times and removed a reference belonging to libdbus, since this is a shared connection." :
2836 "Most likely, the application was supposed to call dbus_connection_close(), since this is a private connection.");
2837 return;
2838 }
2839#endif
2840 _dbus_connection_last_unref (connection);
2841 }
2842}
2843
2844/*
2845 * Note that the transport can disconnect itself (other end drops us)
2846 * and in that case this function never runs. So this function must
2847 * not do anything more than disconnect the transport and update the
2848 * dispatch status.
2849 *
2850 * If the transport self-disconnects, then we assume someone will
2851 * dispatch the connection to cause the dispatch status update.
2852 */
2853static void
2854_dbus_connection_close_possibly_shared_and_unlock (DBusConnection *connection)
2855{
2856 DBusDispatchStatus status;
2857
2858 HAVE_LOCK_CHECK (connection);
2859
2860 _dbus_verbose ("Disconnecting %p\n", connection);
2861
2862 /* We need to ref because update_dispatch_status_and_unlock will unref
2863 * the connection if it was shared and libdbus was the only remaining
2864 * refcount holder.
2865 */
2866 _dbus_connection_ref_unlocked (connection);
2867
2869
2870 /* This has the side effect of queuing the disconnect message link
2871 * (unless we don't have enough memory, possibly, so don't assert it).
2872 * After the disconnect message link is queued, dbus_bus_get/dbus_connection_open
2873 * should never again return the newly-disconnected connection.
2874 *
2875 * However, we only unref the shared connection and exit_on_disconnect when
2876 * the disconnect message reaches the head of the message queue,
2877 * NOT when it's first queued.
2878 */
2879 status = _dbus_connection_get_dispatch_status_unlocked (connection);
2880
2881 /* This calls out to user code */
2882 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
2883
2884 /* Could also call out to user code */
2885 dbus_connection_unref (connection);
2886}
2887
2930void
2932{
2933 _dbus_return_if_fail (connection != NULL);
2934 _dbus_return_if_fail (connection->generation == _dbus_current_generation);
2935
2936 CONNECTION_LOCK (connection);
2937
2938#ifndef DBUS_DISABLE_CHECKS
2939 if (connection->shareable)
2940 {
2941 CONNECTION_UNLOCK (connection);
2942
2943 _dbus_warn_check_failed ("Applications must not close shared connections - see dbus_connection_close() docs. This is a bug in the application.");
2944 return;
2945 }
2946#endif
2947
2948 _dbus_connection_close_possibly_shared_and_unlock (connection);
2949}
2950
2951static dbus_bool_t
2952_dbus_connection_get_is_connected_unlocked (DBusConnection *connection)
2953{
2954 HAVE_LOCK_CHECK (connection);
2955 return _dbus_transport_get_is_connected (connection->transport);
2956}
2957
2973{
2974 dbus_bool_t res;
2975
2976 _dbus_return_val_if_fail (connection != NULL, FALSE);
2977
2978 CONNECTION_LOCK (connection);
2979 res = _dbus_connection_get_is_connected_unlocked (connection);
2980 CONNECTION_UNLOCK (connection);
2981
2982 return res;
2983}
2984
2995{
2996 dbus_bool_t res;
2997
2998 _dbus_return_val_if_fail (connection != NULL, FALSE);
2999
3000 CONNECTION_LOCK (connection);
3002 CONNECTION_UNLOCK (connection);
3003
3004 return res;
3005}
3006
3029{
3030 dbus_bool_t res;
3031
3032 _dbus_return_val_if_fail (connection != NULL, FALSE);
3033
3034 CONNECTION_LOCK (connection);
3035 res = _dbus_transport_get_is_anonymous (connection->transport);
3036 CONNECTION_UNLOCK (connection);
3037
3038 return res;
3039}
3040
3072char*
3074{
3075 char *id;
3076
3077 _dbus_return_val_if_fail (connection != NULL, NULL);
3078
3079 CONNECTION_LOCK (connection);
3081 CONNECTION_UNLOCK (connection);
3082
3083 return id;
3084}
3085
3105 int type)
3106{
3107 _dbus_return_val_if_fail (connection != NULL, FALSE);
3108
3109 if (!dbus_type_is_valid (type))
3110 return FALSE;
3111
3112 if (type != DBUS_TYPE_UNIX_FD)
3113 return TRUE;
3114
3115#ifdef HAVE_UNIX_FD_PASSING
3116 {
3117 dbus_bool_t b;
3118
3119 CONNECTION_LOCK(connection);
3121 CONNECTION_UNLOCK(connection);
3122
3123 return b;
3124 }
3125#endif
3126
3127 return FALSE;
3128}
3129
3143void
3145 dbus_bool_t exit_on_disconnect)
3146{
3147 _dbus_return_if_fail (connection != NULL);
3148
3149 CONNECTION_LOCK (connection);
3150 connection->exit_on_disconnect = exit_on_disconnect != FALSE;
3151 CONNECTION_UNLOCK (connection);
3152}
3153
3165{
3166 DBusPreallocatedSend *preallocated;
3167
3168 _dbus_return_val_if_fail (connection != NULL, NULL);
3169
3170 CONNECTION_LOCK (connection);
3171
3172 preallocated =
3173 _dbus_connection_preallocate_send_unlocked (connection);
3174
3175 CONNECTION_UNLOCK (connection);
3176
3177 return preallocated;
3178}
3179
3189void
3191 DBusPreallocatedSend *preallocated)
3192{
3193 _dbus_return_if_fail (connection != NULL);
3194 _dbus_return_if_fail (preallocated != NULL);
3195 _dbus_return_if_fail (connection == preallocated->connection);
3196
3197 _dbus_list_free_link (preallocated->queue_link);
3198 _dbus_counter_unref (preallocated->counter_link->data);
3199 _dbus_list_free_link (preallocated->counter_link);
3200 dbus_free (preallocated);
3201}
3202
3215void
3217 DBusPreallocatedSend *preallocated,
3218 DBusMessage *message,
3219 dbus_uint32_t *client_serial)
3220{
3221 _dbus_return_if_fail (connection != NULL);
3222 _dbus_return_if_fail (preallocated != NULL);
3223 _dbus_return_if_fail (message != NULL);
3224 _dbus_return_if_fail (preallocated->connection == connection);
3225 _dbus_return_if_fail (dbus_message_get_type (message) != DBUS_MESSAGE_TYPE_METHOD_CALL ||
3226 dbus_message_get_member (message) != NULL);
3227 _dbus_return_if_fail (dbus_message_get_type (message) != DBUS_MESSAGE_TYPE_SIGNAL ||
3228 (dbus_message_get_interface (message) != NULL &&
3229 dbus_message_get_member (message) != NULL));
3230
3231 CONNECTION_LOCK (connection);
3232
3233#ifdef HAVE_UNIX_FD_PASSING
3234
3235 if (!_dbus_transport_can_pass_unix_fd(connection->transport) &&
3236 message->n_unix_fds > 0)
3237 {
3238 /* Refuse to send fds on a connection that cannot handle
3239 them. Unfortunately we cannot return a proper error here, so
3240 the best we can is just return. */
3241 CONNECTION_UNLOCK (connection);
3242 return;
3243 }
3244
3245#endif
3246
3247 _dbus_connection_send_preallocated_and_unlock (connection,
3248 preallocated,
3249 message, client_serial);
3250}
3251
3252static dbus_bool_t
3253_dbus_connection_send_unlocked_no_update (DBusConnection *connection,
3254 DBusMessage *message,
3255 dbus_uint32_t *client_serial)
3256{
3257 DBusPreallocatedSend *preallocated;
3258
3259 _dbus_assert (connection != NULL);
3260 _dbus_assert (message != NULL);
3261
3262 preallocated = _dbus_connection_preallocate_send_unlocked (connection);
3263 if (preallocated == NULL)
3264 return FALSE;
3265
3266 _dbus_connection_send_preallocated_unlocked_no_update (connection,
3267 preallocated,
3268 message,
3269 client_serial);
3270 return TRUE;
3271}
3272
3302 DBusMessage *message,
3303 dbus_uint32_t *serial)
3304{
3305 _dbus_return_val_if_fail (connection != NULL, FALSE);
3306 _dbus_return_val_if_fail (message != NULL, FALSE);
3307
3308 CONNECTION_LOCK (connection);
3309
3310#ifdef HAVE_UNIX_FD_PASSING
3311
3312 if (!_dbus_transport_can_pass_unix_fd(connection->transport) &&
3313 message->n_unix_fds > 0)
3314 {
3315 /* Refuse to send fds on a connection that cannot handle
3316 them. Unfortunately we cannot return a proper error here, so
3317 the best we can is just return. */
3318 CONNECTION_UNLOCK (connection);
3319 return FALSE;
3320 }
3321
3322#endif
3323
3324 return _dbus_connection_send_and_unlock (connection,
3325 message,
3326 serial);
3327}
3328
3329static dbus_bool_t
3330reply_handler_timeout (void *data)
3331{
3332 DBusConnection *connection;
3333 DBusDispatchStatus status;
3334 DBusPendingCall *pending = data;
3335
3336 connection = _dbus_pending_call_get_connection_and_lock (pending);
3337 _dbus_connection_ref_unlocked (connection);
3338
3340 connection);
3344
3345 _dbus_verbose ("middle\n");
3346 status = _dbus_connection_get_dispatch_status_unlocked (connection);
3347
3348 /* Unlocks, and calls out to user code */
3349 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
3350 dbus_connection_unref (connection);
3351
3352 return TRUE;
3353}
3354
3399 DBusMessage *message,
3400 DBusPendingCall **pending_return,
3401 int timeout_milliseconds)
3402{
3403 DBusPendingCall *pending;
3404 dbus_int32_t serial = -1;
3405 DBusDispatchStatus status;
3406
3407 _dbus_return_val_if_fail (connection != NULL, FALSE);
3408 _dbus_return_val_if_fail (message != NULL, FALSE);
3409 _dbus_return_val_if_fail (timeout_milliseconds >= 0 || timeout_milliseconds == -1, FALSE);
3410
3411 if (pending_return)
3412 *pending_return = NULL;
3413
3414 CONNECTION_LOCK (connection);
3415
3416#ifdef HAVE_UNIX_FD_PASSING
3417
3418 if (!_dbus_transport_can_pass_unix_fd(connection->transport) &&
3419 message->n_unix_fds > 0)
3420 {
3421 /* Refuse to send fds on a connection that cannot handle
3422 them. Unfortunately we cannot return a proper error here, so
3423 the best we can do is return TRUE but leave *pending_return
3424 as NULL. */
3425 CONNECTION_UNLOCK (connection);
3426 return TRUE;
3427 }
3428
3429#endif
3430
3431 if (!_dbus_connection_get_is_connected_unlocked (connection))
3432 {
3433 CONNECTION_UNLOCK (connection);
3434
3435 return TRUE;
3436 }
3437
3438 pending = _dbus_pending_call_new_unlocked (connection,
3439 timeout_milliseconds,
3440 reply_handler_timeout);
3441
3442 if (pending == NULL)
3443 {
3444 CONNECTION_UNLOCK (connection);
3445 return FALSE;
3446 }
3447
3448 /* Assign a serial to the message */
3449 serial = dbus_message_get_serial (message);
3450 if (serial == 0)
3451 {
3452 serial = _dbus_connection_get_next_client_serial (connection);
3453 dbus_message_set_serial (message, serial);
3454 }
3455
3456 if (!_dbus_pending_call_set_timeout_error_unlocked (pending, message, serial))
3457 goto error;
3458
3459 /* Insert the serial in the pending replies hash;
3460 * hash takes a refcount on DBusPendingCall.
3461 * Also, add the timeout.
3462 */
3463 if (!_dbus_connection_attach_pending_call_unlocked (connection,
3464 pending))
3465 goto error;
3466
3467 if (!_dbus_connection_send_unlocked_no_update (connection, message, NULL))
3468 {
3469 _dbus_connection_detach_pending_call_and_unlock (connection,
3470 pending);
3471 goto error_unlocked;
3472 }
3473
3474 if (pending_return)
3475 *pending_return = pending; /* hand off refcount */
3476 else
3477 {
3478 _dbus_connection_detach_pending_call_unlocked (connection, pending);
3479 /* we still have a ref to the pending call in this case, we unref
3480 * after unlocking, below
3481 */
3482 }
3483
3484 status = _dbus_connection_get_dispatch_status_unlocked (connection);
3485
3486 /* this calls out to user code */
3487 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
3488
3489 if (pending_return == NULL)
3490 dbus_pending_call_unref (pending);
3491
3492 return TRUE;
3493
3494 error:
3495 CONNECTION_UNLOCK (connection);
3496 error_unlocked:
3497 dbus_pending_call_unref (pending);
3498 return FALSE;
3499}
3500
3535 DBusMessage *message,
3536 int timeout_milliseconds,
3537 DBusError *error)
3538{
3539 DBusMessage *reply;
3540 DBusPendingCall *pending;
3541
3542 _dbus_return_val_if_fail (connection != NULL, NULL);
3543 _dbus_return_val_if_fail (message != NULL, NULL);
3544 _dbus_return_val_if_fail (timeout_milliseconds >= 0 || timeout_milliseconds == -1, NULL);
3545 _dbus_return_val_if_error_is_set (error, NULL);
3546
3547#ifdef HAVE_UNIX_FD_PASSING
3548
3549 CONNECTION_LOCK (connection);
3550 if (!_dbus_transport_can_pass_unix_fd(connection->transport) &&
3551 message->n_unix_fds > 0)
3552 {
3553 CONNECTION_UNLOCK (connection);
3554 dbus_set_error(error, DBUS_ERROR_FAILED, "Cannot send file descriptors on this connection.");
3555 return NULL;
3556 }
3557 CONNECTION_UNLOCK (connection);
3558
3559#endif
3560
3561 if (!dbus_connection_send_with_reply (connection, message,
3562 &pending, timeout_milliseconds))
3563 {
3564 _DBUS_SET_OOM (error);
3565 return NULL;
3566 }
3567
3568 if (pending == NULL)
3569 {
3570 dbus_set_error (error, DBUS_ERROR_DISCONNECTED, "Connection is closed");
3571 return NULL;
3572 }
3573
3574 dbus_pending_call_block (pending);
3575
3576 reply = dbus_pending_call_steal_reply (pending);
3577 dbus_pending_call_unref (pending);
3578
3579 /* call_complete_and_unlock() called from pending_call_block() should
3580 * always fill this in.
3581 */
3582 _dbus_assert (reply != NULL);
3583
3584 if (dbus_set_error_from_message (error, reply))
3585 {
3586 dbus_message_unref (reply);
3587 return NULL;
3588 }
3589 else
3590 return reply;
3591}
3592
3601static DBusDispatchStatus
3602_dbus_connection_flush_unlocked (DBusConnection *connection)
3603{
3604 /* We have to specify DBUS_ITERATION_DO_READING here because
3605 * otherwise we could have two apps deadlock if they are both doing
3606 * a flush(), and the kernel buffers fill up. This could change the
3607 * dispatch status.
3608 */
3609 DBusDispatchStatus status;
3610
3611 HAVE_LOCK_CHECK (connection);
3612
3613 while (connection->n_outgoing > 0 &&
3614 _dbus_connection_get_is_connected_unlocked (connection))
3615 {
3616 _dbus_verbose ("doing iteration in\n");
3617 HAVE_LOCK_CHECK (connection);
3619 NULL,
3620 DBUS_ITERATION_DO_READING |
3621 DBUS_ITERATION_DO_WRITING |
3622 DBUS_ITERATION_BLOCK,
3623 -1);
3624 }
3625
3626 HAVE_LOCK_CHECK (connection);
3627 _dbus_verbose ("middle\n");
3628 status = _dbus_connection_get_dispatch_status_unlocked (connection);
3629
3630 HAVE_LOCK_CHECK (connection);
3631 return status;
3632}
3633
3639void
3641{
3642 /* We have to specify DBUS_ITERATION_DO_READING here because
3643 * otherwise we could have two apps deadlock if they are both doing
3644 * a flush(), and the kernel buffers fill up. This could change the
3645 * dispatch status.
3646 */
3647 DBusDispatchStatus status;
3648
3649 _dbus_return_if_fail (connection != NULL);
3650
3651 CONNECTION_LOCK (connection);
3652
3653 status = _dbus_connection_flush_unlocked (connection);
3654
3655 HAVE_LOCK_CHECK (connection);
3656 /* Unlocks and calls out to user code */
3657 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
3658
3659 _dbus_verbose ("end\n");
3660}
3661
3672static dbus_bool_t
3673_dbus_connection_read_write_dispatch (DBusConnection *connection,
3674 int timeout_milliseconds,
3675 dbus_bool_t dispatch)
3676{
3677 DBusDispatchStatus dstatus;
3678 dbus_bool_t progress_possible;
3679
3680 /* Need to grab a ref here in case we're a private connection and
3681 * the user drops the last ref in a handler we call; see bug
3682 * https://bugs.freedesktop.org/show_bug.cgi?id=15635
3683 */
3684 dbus_connection_ref (connection);
3685 dstatus = dbus_connection_get_dispatch_status (connection);
3686
3687 if (dispatch && dstatus == DBUS_DISPATCH_DATA_REMAINS)
3688 {
3689 _dbus_verbose ("doing dispatch\n");
3690 dbus_connection_dispatch (connection);
3691 CONNECTION_LOCK (connection);
3692 }
3693 else if (dstatus == DBUS_DISPATCH_NEED_MEMORY)
3694 {
3695 _dbus_verbose ("pausing for memory\n");
3696 _dbus_memory_pause_based_on_timeout (timeout_milliseconds);
3697 CONNECTION_LOCK (connection);
3698 }
3699 else
3700 {
3701 CONNECTION_LOCK (connection);
3702 if (_dbus_connection_get_is_connected_unlocked (connection))
3703 {
3704 _dbus_verbose ("doing iteration\n");
3706 NULL,
3707 DBUS_ITERATION_DO_READING |
3708 DBUS_ITERATION_DO_WRITING |
3709 DBUS_ITERATION_BLOCK,
3710 timeout_milliseconds);
3711 }
3712 }
3713
3714 HAVE_LOCK_CHECK (connection);
3715 /* If we can dispatch, we can make progress until the Disconnected message
3716 * has been processed; if we can only read/write, we can make progress
3717 * as long as the transport is open.
3718 */
3719 if (dispatch)
3720 progress_possible = connection->n_incoming != 0 ||
3721 connection->disconnect_message_link != NULL;
3722 else
3723 progress_possible = _dbus_connection_get_is_connected_unlocked (connection);
3724
3725 CONNECTION_UNLOCK (connection);
3726
3727 dbus_connection_unref (connection);
3728
3729 return progress_possible; /* TRUE if we can make more progress */
3730}
3731
3732
3769 int timeout_milliseconds)
3770{
3771 _dbus_return_val_if_fail (connection != NULL, FALSE);
3772 _dbus_return_val_if_fail (timeout_milliseconds >= 0 || timeout_milliseconds == -1, FALSE);
3773 return _dbus_connection_read_write_dispatch(connection, timeout_milliseconds, TRUE);
3774}
3775
3801 int timeout_milliseconds)
3802{
3803 _dbus_return_val_if_fail (connection != NULL, FALSE);
3804 _dbus_return_val_if_fail (timeout_milliseconds >= 0 || timeout_milliseconds == -1, FALSE);
3805 return _dbus_connection_read_write_dispatch(connection, timeout_milliseconds, FALSE);
3806}
3807
3808/* We need to call this anytime we pop the head of the queue, and then
3809 * update_dispatch_status_and_unlock needs to be called afterward
3810 * which will "process" the disconnected message and set
3811 * disconnected_message_processed.
3812 */
3813static void
3814check_disconnected_message_arrived_unlocked (DBusConnection *connection,
3815 DBusMessage *head_of_queue)
3816{
3817 HAVE_LOCK_CHECK (connection);
3818
3819 /* checking that the link is NULL is an optimization to avoid the is_signal call */
3820 if (connection->disconnect_message_link == NULL &&
3821 dbus_message_is_signal (head_of_queue,
3823 "Disconnected"))
3824 {
3825 connection->disconnected_message_arrived = TRUE;
3826 }
3827}
3828
3850{
3851 DBusDispatchStatus status;
3852 DBusMessage *message;
3853
3854 _dbus_return_val_if_fail (connection != NULL, NULL);
3855
3856 _dbus_verbose ("start\n");
3857
3858 /* this is called for the side effect that it queues
3859 * up any messages from the transport
3860 */
3861 status = dbus_connection_get_dispatch_status (connection);
3862 if (status != DBUS_DISPATCH_DATA_REMAINS)
3863 return NULL;
3864
3865 CONNECTION_LOCK (connection);
3866
3867 _dbus_connection_acquire_dispatch (connection);
3868
3869 /* While a message is outstanding, the dispatch lock is held */
3870 _dbus_assert (connection->message_borrowed == NULL);
3871
3872 connection->message_borrowed = _dbus_list_get_first (&connection->incoming_messages);
3873
3874 message = connection->message_borrowed;
3875
3876 check_disconnected_message_arrived_unlocked (connection, message);
3877
3878 /* Note that we KEEP the dispatch lock until the message is returned */
3879 if (message == NULL)
3880 _dbus_connection_release_dispatch (connection);
3881
3882 CONNECTION_UNLOCK (connection);
3883
3884 _dbus_message_trace_ref (message, -1, -1, "dbus_connection_borrow_message");
3885
3886 /* We don't update dispatch status until it's returned or stolen */
3887
3888 return message;
3889}
3890
3899void
3901 DBusMessage *message)
3902{
3903 DBusDispatchStatus status;
3904
3905 _dbus_return_if_fail (connection != NULL);
3906 _dbus_return_if_fail (message != NULL);
3907 _dbus_return_if_fail (message == connection->message_borrowed);
3908 _dbus_return_if_fail (connection->dispatch_acquired);
3909
3910 CONNECTION_LOCK (connection);
3911
3912 _dbus_assert (message == connection->message_borrowed);
3913
3914 connection->message_borrowed = NULL;
3915
3916 _dbus_connection_release_dispatch (connection);
3917
3918 status = _dbus_connection_get_dispatch_status_unlocked (connection);
3919 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
3920
3921 _dbus_message_trace_ref (message, -1, -1, "dbus_connection_return_message");
3922}
3923
3933void
3935 DBusMessage *message)
3936{
3937 DBusMessage *pop_message;
3938 DBusDispatchStatus status;
3939
3940 _dbus_return_if_fail (connection != NULL);
3941 _dbus_return_if_fail (message != NULL);
3942 _dbus_return_if_fail (message == connection->message_borrowed);
3943 _dbus_return_if_fail (connection->dispatch_acquired);
3944
3945 CONNECTION_LOCK (connection);
3946
3947 _dbus_assert (message == connection->message_borrowed);
3948
3949 pop_message = _dbus_list_pop_first (&connection->incoming_messages);
3950 _dbus_assert (message == pop_message);
3951 (void) pop_message; /* unused unless asserting */
3952
3953 connection->n_incoming -= 1;
3954
3955 _dbus_verbose ("Incoming message %p stolen from queue, %d incoming\n",
3956 message, connection->n_incoming);
3957
3958 connection->message_borrowed = NULL;
3959
3960 _dbus_connection_release_dispatch (connection);
3961
3962 status = _dbus_connection_get_dispatch_status_unlocked (connection);
3963 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
3964 _dbus_message_trace_ref (message, -1, -1,
3965 "dbus_connection_steal_borrowed_message");
3966}
3967
3968/* See dbus_connection_pop_message, but requires the caller to own
3969 * the lock before calling. May drop the lock while running.
3970 */
3971static DBusList*
3972_dbus_connection_pop_message_link_unlocked (DBusConnection *connection)
3973{
3974 HAVE_LOCK_CHECK (connection);
3975
3976 _dbus_assert (connection->message_borrowed == NULL);
3977
3978 if (connection->n_incoming > 0)
3979 {
3980 DBusList *link;
3981
3982 link = _dbus_list_pop_first_link (&connection->incoming_messages);
3983 connection->n_incoming -= 1;
3984
3985 _dbus_verbose ("Message %p (%s %s %s %s sig:'%s' serial:%u) removed from incoming queue %p, %d incoming\n",
3986 link->data,
3988 dbus_message_get_path (link->data) ?
3989 dbus_message_get_path (link->data) :
3990 "no path",
3993 "no interface",
3996 "no member",
3999 connection, connection->n_incoming);
4000
4001 _dbus_message_trace_ref (link->data, -1, -1,
4002 "_dbus_connection_pop_message_link_unlocked");
4003
4004 check_disconnected_message_arrived_unlocked (connection, link->data);
4005
4006 return link;
4007 }
4008 else
4009 return NULL;
4010}
4011
4012/* See dbus_connection_pop_message, but requires the caller to own
4013 * the lock before calling. May drop the lock while running.
4014 */
4015static DBusMessage*
4016_dbus_connection_pop_message_unlocked (DBusConnection *connection)
4017{
4018 DBusList *link;
4019
4020 HAVE_LOCK_CHECK (connection);
4021
4022 link = _dbus_connection_pop_message_link_unlocked (connection);
4023
4024 if (link != NULL)
4025 {
4026 DBusMessage *message;
4027
4028 message = link->data;
4029
4030 _dbus_list_free_link (link);
4031
4032 return message;
4033 }
4034 else
4035 return NULL;
4036}
4037
4038static void
4039_dbus_connection_putback_message_link_unlocked (DBusConnection *connection,
4040 DBusList *message_link)
4041{
4042 HAVE_LOCK_CHECK (connection);
4043
4044 _dbus_assert (message_link != NULL);
4045 /* You can't borrow a message while a link is outstanding */
4046 _dbus_assert (connection->message_borrowed == NULL);
4047 /* We had to have the dispatch lock across the pop/putback */
4048 _dbus_assert (connection->dispatch_acquired);
4049
4051 message_link);
4052 connection->n_incoming += 1;
4053
4054 _dbus_verbose ("Message %p (%s %s %s '%s') put back into queue %p, %d incoming\n",
4055 message_link->data,
4057 dbus_message_get_interface (message_link->data) ?
4058 dbus_message_get_interface (message_link->data) :
4059 "no interface",
4060 dbus_message_get_member (message_link->data) ?
4061 dbus_message_get_member (message_link->data) :
4062 "no member",
4063 dbus_message_get_signature (message_link->data),
4064 connection, connection->n_incoming);
4065
4066 _dbus_message_trace_ref (message_link->data, -1, -1,
4067 "_dbus_connection_putback_message_link_unlocked");
4068}
4069
4091{
4092 DBusMessage *message;
4093 DBusDispatchStatus status;
4094
4095 _dbus_verbose ("start\n");
4096
4097 /* this is called for the side effect that it queues
4098 * up any messages from the transport
4099 */
4100 status = dbus_connection_get_dispatch_status (connection);
4101 if (status != DBUS_DISPATCH_DATA_REMAINS)
4102 return NULL;
4103
4104 CONNECTION_LOCK (connection);
4105 _dbus_connection_acquire_dispatch (connection);
4106 HAVE_LOCK_CHECK (connection);
4107
4108 message = _dbus_connection_pop_message_unlocked (connection);
4109
4110 _dbus_verbose ("Returning popped message %p\n", message);
4111
4112 _dbus_connection_release_dispatch (connection);
4113
4114 status = _dbus_connection_get_dispatch_status_unlocked (connection);
4115 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
4116
4117 return message;
4118}
4119
4127static void
4128_dbus_connection_acquire_dispatch (DBusConnection *connection)
4129{
4130 HAVE_LOCK_CHECK (connection);
4131
4132 _dbus_connection_ref_unlocked (connection);
4133 CONNECTION_UNLOCK (connection);
4134
4135 _dbus_verbose ("locking dispatch_mutex\n");
4136 _dbus_cmutex_lock (connection->dispatch_mutex);
4137
4138 while (connection->dispatch_acquired)
4139 {
4140 _dbus_verbose ("waiting for dispatch to be acquirable\n");
4141 _dbus_condvar_wait (connection->dispatch_cond,
4142 connection->dispatch_mutex);
4143 }
4144
4145 _dbus_assert (!connection->dispatch_acquired);
4146
4147 connection->dispatch_acquired = TRUE;
4148
4149 _dbus_verbose ("unlocking dispatch_mutex\n");
4150 _dbus_cmutex_unlock (connection->dispatch_mutex);
4151
4152 CONNECTION_LOCK (connection);
4154}
4155
4163static void
4164_dbus_connection_release_dispatch (DBusConnection *connection)
4165{
4166 HAVE_LOCK_CHECK (connection);
4167
4168 _dbus_verbose ("locking dispatch_mutex\n");
4169 _dbus_cmutex_lock (connection->dispatch_mutex);
4170
4171 _dbus_assert (connection->dispatch_acquired);
4172
4173 connection->dispatch_acquired = FALSE;
4175
4176 _dbus_verbose ("unlocking dispatch_mutex\n");
4177 _dbus_cmutex_unlock (connection->dispatch_mutex);
4178}
4179
4180static void
4181_dbus_connection_failed_pop (DBusConnection *connection,
4182 DBusList *message_link)
4183{
4185 message_link);
4186 connection->n_incoming += 1;
4187}
4188
4189/* Note this may be called multiple times since we don't track whether we already did it */
4190static void
4191notify_disconnected_unlocked (DBusConnection *connection)
4192{
4193 HAVE_LOCK_CHECK (connection);
4194
4195 /* Set the weakref in dbus-bus.c to NULL, so nobody will get a disconnected
4196 * connection from dbus_bus_get(). We make the same guarantee for
4197 * dbus_connection_open() but in a different way since we don't want to
4198 * unref right here; we instead check for connectedness before returning
4199 * the connection from the hash.
4200 */
4202
4203 /* Dump the outgoing queue, we aren't going to be able to
4204 * send it now, and we'd like accessors like
4205 * dbus_connection_get_outgoing_size() to be accurate.
4206 */
4207 if (connection->n_outgoing > 0)
4208 {
4209 DBusList *link;
4210
4211 _dbus_verbose ("Dropping %d outgoing messages since we're disconnected\n",
4212 connection->n_outgoing);
4213
4214 while ((link = _dbus_list_get_last_link (&connection->outgoing_messages)))
4215 {
4216 _dbus_connection_message_sent_unlocked (connection, link->data);
4217 }
4218 }
4219}
4220
4221/* Note this may be called multiple times since we don't track whether we already did it */
4222static DBusDispatchStatus
4223notify_disconnected_and_dispatch_complete_unlocked (DBusConnection *connection)
4224{
4225 HAVE_LOCK_CHECK (connection);
4226
4227 if (connection->disconnect_message_link != NULL)
4228 {
4229 _dbus_verbose ("Sending disconnect message\n");
4230
4231 /* If we have pending calls, queue their timeouts - we want the Disconnected
4232 * to be the last message, after these timeouts.
4233 */
4234 connection_timeout_and_complete_all_pending_calls_unlocked (connection);
4235
4236 /* We haven't sent the disconnect message already,
4237 * and all real messages have been queued up.
4238 */
4240 connection->disconnect_message_link);
4241 connection->disconnect_message_link = NULL;
4242
4244 }
4245
4247}
4248
4249static DBusDispatchStatus
4250_dbus_connection_get_dispatch_status_unlocked (DBusConnection *connection)
4251{
4252 HAVE_LOCK_CHECK (connection);
4253
4254 if (connection->n_incoming > 0)
4256 else if (!_dbus_transport_queue_messages (connection->transport))
4258 else
4259 {
4260 DBusDispatchStatus status;
4261 dbus_bool_t is_connected;
4262
4263 status = _dbus_transport_get_dispatch_status (connection->transport);
4264 is_connected = _dbus_transport_get_is_connected (connection->transport);
4265
4266 _dbus_verbose ("dispatch status = %s is_connected = %d\n",
4267 DISPATCH_STATUS_NAME (status), is_connected);
4268
4269 if (!is_connected)
4270 {
4271 /* It's possible this would be better done by having an explicit
4272 * notification from _dbus_transport_disconnect() that would
4273 * synchronously do this, instead of waiting for the next dispatch
4274 * status check. However, probably not good to change until it causes
4275 * a problem.
4276 */
4277 notify_disconnected_unlocked (connection);
4278
4279 /* I'm not sure this is needed; the idea is that we want to
4280 * queue the Disconnected only after we've read all the
4281 * messages, but if we're disconnected maybe we are guaranteed
4282 * to have read them all ?
4283 */
4284 if (status == DBUS_DISPATCH_COMPLETE)
4285 status = notify_disconnected_and_dispatch_complete_unlocked (connection);
4286 }
4287
4288 if (status != DBUS_DISPATCH_COMPLETE)
4289 return status;
4290 else if (connection->n_incoming > 0)
4292 else
4294 }
4295}
4296
4297static void
4298_dbus_connection_update_dispatch_status_and_unlock (DBusConnection *connection,
4299 DBusDispatchStatus new_status)
4300{
4301 dbus_bool_t changed;
4303 void *data;
4304
4305 HAVE_LOCK_CHECK (connection);
4306
4307 _dbus_connection_ref_unlocked (connection);
4308
4309 changed = new_status != connection->last_dispatch_status;
4310
4311 connection->last_dispatch_status = new_status;
4312
4313 function = connection->dispatch_status_function;
4314 data = connection->dispatch_status_data;
4315
4316 if (connection->disconnected_message_arrived &&
4317 !connection->disconnected_message_processed)
4318 {
4320
4321 /* this does an unref, but we have a ref
4322 * so we should not run the finalizer here
4323 * inside the lock.
4324 */
4325 connection_forget_shared_unlocked (connection);
4326
4327 if (connection->exit_on_disconnect)
4328 {
4329 CONNECTION_UNLOCK (connection);
4330
4331 _dbus_verbose ("Exiting on Disconnected signal\n");
4332 _dbus_exit (1);
4333 _dbus_assert_not_reached ("Call to exit() returned");
4334 }
4335 }
4336
4337 /* We drop the lock */
4338 CONNECTION_UNLOCK (connection);
4339
4340 if (changed && function)
4341 {
4342 _dbus_verbose ("Notifying of change to dispatch status of %p now %d (%s)\n",
4343 connection, new_status,
4344 DISPATCH_STATUS_NAME (new_status));
4345 (* function) (connection, new_status, data);
4346 }
4347
4348 dbus_connection_unref (connection);
4349}
4350
4378{
4379 DBusDispatchStatus status;
4380
4381 _dbus_return_val_if_fail (connection != NULL, DBUS_DISPATCH_COMPLETE);
4382
4383 _dbus_verbose ("start\n");
4384
4385 CONNECTION_LOCK (connection);
4386
4387 status = _dbus_connection_get_dispatch_status_unlocked (connection);
4388
4389 CONNECTION_UNLOCK (connection);
4390
4391 return status;
4392}
4393
4397static DBusHandlerResult
4398_dbus_connection_peer_filter_unlocked_no_update (DBusConnection *connection,
4399 DBusMessage *message)
4400{
4401 dbus_bool_t sent = FALSE;
4402 DBusMessage *ret = NULL;
4403 DBusList *expire_link;
4404
4405 if (connection->route_peer_messages && dbus_message_get_destination (message) != NULL)
4406 {
4407 /* This means we're letting the bus route this message */
4409 }
4410
4412 {
4414 }
4415
4416 /* Preallocate a linked-list link, so that if we need to dispose of a
4417 * message, we can attach it to the expired list */
4418 expire_link = _dbus_list_alloc_link (NULL);
4419
4420 if (!expire_link)
4422
4423 if (dbus_message_is_method_call (message,
4425 "Ping"))
4426 {
4427 ret = dbus_message_new_method_return (message);
4428 if (ret == NULL)
4429 goto out;
4430
4431 sent = _dbus_connection_send_unlocked_no_update (connection, ret, NULL);
4432 }
4433 else if (dbus_message_is_method_call (message,
4435 "GetMachineId"))
4436 {
4437 DBusString uuid;
4438 DBusError error = DBUS_ERROR_INIT;
4439
4440 if (!_dbus_string_init (&uuid))
4441 goto out;
4442
4443 if (_dbus_get_local_machine_uuid_encoded (&uuid, &error))
4444 {
4445 const char *v_STRING;
4446
4447 ret = dbus_message_new_method_return (message);
4448
4449 if (ret == NULL)
4450 {
4451 _dbus_string_free (&uuid);
4452 goto out;
4453 }
4454
4455 v_STRING = _dbus_string_get_const_data (&uuid);
4456 if (dbus_message_append_args (ret,
4457 DBUS_TYPE_STRING, &v_STRING,
4459 {
4460 sent = _dbus_connection_send_unlocked_no_update (connection, ret, NULL);
4461 }
4462 }
4463 else if (dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY))
4464 {
4465 dbus_error_free (&error);
4466 goto out;
4467 }
4468 else
4469 {
4470 ret = dbus_message_new_error (message, error.name, error.message);
4471 dbus_error_free (&error);
4472
4473 if (ret == NULL)
4474 goto out;
4475
4476 sent = _dbus_connection_send_unlocked_no_update (connection, ret,
4477 NULL);
4478 }
4479
4480 _dbus_string_free (&uuid);
4481 }
4482 else
4483 {
4484 /* We need to bounce anything else with this interface, otherwise apps
4485 * could start extending the interface and when we added extensions
4486 * here to DBusConnection we'd break those apps.
4487 */
4488 ret = dbus_message_new_error (message,
4490 "Unknown method invoked on org.freedesktop.DBus.Peer interface");
4491 if (ret == NULL)
4492 goto out;
4493
4494 sent = _dbus_connection_send_unlocked_no_update (connection, ret, NULL);
4495 }
4496
4497out:
4498 if (ret == NULL)
4499 {
4500 _dbus_list_free_link (expire_link);
4501 }
4502 else
4503 {
4504 /* It'll be safe to unref the reply when we unlock */
4505 expire_link->data = ret;
4506 _dbus_list_prepend_link (&connection->expired_messages, expire_link);
4507 }
4508
4509 if (!sent)
4511
4513}
4514
4521static DBusHandlerResult
4522_dbus_connection_run_builtin_filters_unlocked_no_update (DBusConnection *connection,
4523 DBusMessage *message)
4524{
4525 /* We just run one filter for now but have the option to run more
4526 if the spec calls for it in the future */
4527
4528 return _dbus_connection_peer_filter_unlocked_no_update (connection, message);
4529}
4530
4575{
4576 DBusMessage *message;
4577 DBusList *link, *filter_list_copy, *message_link;
4578 DBusHandlerResult result;
4579 DBusPendingCall *pending;
4580 dbus_int32_t reply_serial;
4581 DBusDispatchStatus status;
4582 dbus_bool_t found_object;
4583
4584 _dbus_return_val_if_fail (connection != NULL, DBUS_DISPATCH_COMPLETE);
4585
4586 _dbus_verbose ("\n");
4587
4588 CONNECTION_LOCK (connection);
4589 status = _dbus_connection_get_dispatch_status_unlocked (connection);
4590 if (status != DBUS_DISPATCH_DATA_REMAINS)
4591 {
4592 /* unlocks and calls out to user code */
4593 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
4594 return status;
4595 }
4596
4597 /* We need to ref the connection since the callback could potentially
4598 * drop the last ref to it
4599 */
4600 _dbus_connection_ref_unlocked (connection);
4601
4602 _dbus_connection_acquire_dispatch (connection);
4603 HAVE_LOCK_CHECK (connection);
4604
4605 message_link = _dbus_connection_pop_message_link_unlocked (connection);
4606 if (message_link == NULL)
4607 {
4608 /* another thread dispatched our stuff */
4609
4610 _dbus_verbose ("another thread dispatched message (during acquire_dispatch above)\n");
4611
4612 _dbus_connection_release_dispatch (connection);
4613
4614 status = _dbus_connection_get_dispatch_status_unlocked (connection);
4615
4616 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
4617
4618 dbus_connection_unref (connection);
4619
4620 return status;
4621 }
4622
4623 message = message_link->data;
4624
4625 _dbus_verbose (" dispatching message %p (%s %s %s '%s')\n",
4626 message,
4628 dbus_message_get_interface (message) ?
4629 dbus_message_get_interface (message) :
4630 "no interface",
4631 dbus_message_get_member (message) ?
4632 dbus_message_get_member (message) :
4633 "no member",
4634 dbus_message_get_signature (message));
4635
4637
4638 /* Pending call handling must be first, because if you do
4639 * dbus_connection_send_with_reply_and_block() or
4640 * dbus_pending_call_block() then no handlers/filters will be run on
4641 * the reply. We want consistent semantics in the case where we
4642 * dbus_connection_dispatch() the reply.
4643 */
4644
4645 reply_serial = dbus_message_get_reply_serial (message);
4646 pending = _dbus_hash_table_lookup_int (connection->pending_replies,
4647 reply_serial);
4648 if (pending)
4649 {
4650 _dbus_verbose ("Dispatching a pending reply\n");
4651 complete_pending_call_and_unlock (connection, pending, message);
4652 pending = NULL; /* it's probably unref'd */
4653
4654 CONNECTION_LOCK (connection);
4655 _dbus_verbose ("pending call completed in dispatch\n");
4657 goto out;
4658 }
4659
4660 result = _dbus_connection_run_builtin_filters_unlocked_no_update (connection, message);
4662 goto out;
4663
4664 if (!_dbus_list_copy (&connection->filter_list, &filter_list_copy))
4665 {
4666 _dbus_connection_release_dispatch (connection);
4667 HAVE_LOCK_CHECK (connection);
4668
4669 _dbus_connection_failed_pop (connection, message_link);
4670
4671 /* unlocks and calls user code */
4672 _dbus_connection_update_dispatch_status_and_unlock (connection,
4674 dbus_connection_unref (connection);
4675
4677 }
4678
4679 for (link = _dbus_list_get_first_link (&filter_list_copy);
4680 link != NULL;
4681 link = _dbus_list_get_next_link (&filter_list_copy, link))
4682 _dbus_message_filter_ref (link->data);
4683
4684 /* We're still protected from dispatch() reentrancy here
4685 * since we acquired the dispatcher
4686 */
4687 CONNECTION_UNLOCK (connection);
4688
4689 link = _dbus_list_get_first_link (&filter_list_copy);
4690 while (link != NULL)
4691 {
4692 DBusMessageFilter *filter = link->data;
4693 DBusList *next = _dbus_list_get_next_link (&filter_list_copy, link);
4694
4695 if (filter->function == NULL)
4696 {
4697 _dbus_verbose (" filter was removed in a callback function\n");
4698 link = next;
4699 continue;
4700 }
4701
4702 _dbus_verbose (" running filter on message %p\n", message);
4703 result = (* filter->function) (connection, message, filter->user_data);
4704
4706 break;
4707
4708 link = next;
4709 }
4710
4711 _dbus_list_clear_full (&filter_list_copy,
4712 (DBusFreeFunction) _dbus_message_filter_unref);
4713
4714 CONNECTION_LOCK (connection);
4715
4716 if (result == DBUS_HANDLER_RESULT_NEED_MEMORY)
4717 {
4718 _dbus_verbose ("No memory\n");
4719 goto out;
4720 }
4721 else if (result == DBUS_HANDLER_RESULT_HANDLED)
4722 {
4723 _dbus_verbose ("filter handled message in dispatch\n");
4724 goto out;
4725 }
4726
4727 /* We're still protected from dispatch() reentrancy here
4728 * since we acquired the dispatcher
4729 */
4730 _dbus_verbose (" running object path dispatch on message %p (%s %s %s '%s')\n",
4731 message,
4733 dbus_message_get_interface (message) ?
4734 dbus_message_get_interface (message) :
4735 "no interface",
4736 dbus_message_get_member (message) ?
4737 dbus_message_get_member (message) :
4738 "no member",
4739 dbus_message_get_signature (message));
4740
4741 HAVE_LOCK_CHECK (connection);
4742 result = _dbus_object_tree_dispatch_and_unlock (connection->objects,
4743 message,
4744 &found_object);
4745
4746 CONNECTION_LOCK (connection);
4747
4749 {
4750 _dbus_verbose ("object tree handled message in dispatch\n");
4751 goto out;
4752 }
4753
4755 {
4756 DBusMessage *reply;
4757 DBusString str;
4758 DBusPreallocatedSend *preallocated;
4759 DBusList *expire_link;
4760
4761 _dbus_verbose (" sending error %s\n",
4763
4764 if (!_dbus_string_init (&str))
4765 {
4767 _dbus_verbose ("no memory for error string in dispatch\n");
4768 goto out;
4769 }
4770
4771 if (!_dbus_string_append_printf (&str,
4772 "Method \"%s\" with signature \"%s\" on interface \"%s\" doesn't exist\n",
4773 dbus_message_get_member (message),
4775 dbus_message_get_interface (message)))
4776 {
4777 _dbus_string_free (&str);
4779 _dbus_verbose ("no memory for error string in dispatch\n");
4780 goto out;
4781 }
4782
4783 reply = dbus_message_new_error (message,
4786 _dbus_string_free (&str);
4787
4788 if (reply == NULL)
4789 {
4791 _dbus_verbose ("no memory for error reply in dispatch\n");
4792 goto out;
4793 }
4794
4795 expire_link = _dbus_list_alloc_link (reply);
4796
4797 if (expire_link == NULL)
4798 {
4799 dbus_message_unref (reply);
4801 _dbus_verbose ("no memory for error send in dispatch\n");
4802 goto out;
4803 }
4804
4805 preallocated = _dbus_connection_preallocate_send_unlocked (connection);
4806
4807 if (preallocated == NULL)
4808 {
4809 _dbus_list_free_link (expire_link);
4810 /* It's OK that this is finalized, because it hasn't been seen by
4811 * anything that could attach user callbacks */
4812 dbus_message_unref (reply);
4814 _dbus_verbose ("no memory for error send in dispatch\n");
4815 goto out;
4816 }
4817
4818 _dbus_connection_send_preallocated_unlocked_no_update (connection, preallocated,
4819 reply, NULL);
4820 /* reply will be freed when we release the lock */
4821 _dbus_list_prepend_link (&connection->expired_messages, expire_link);
4822
4824 }
4825
4826 _dbus_verbose (" done dispatching %p (%s %s %s '%s') on connection %p\n", message,
4828 dbus_message_get_interface (message) ?
4829 dbus_message_get_interface (message) :
4830 "no interface",
4831 dbus_message_get_member (message) ?
4832 dbus_message_get_member (message) :
4833 "no member",
4835 connection);
4836
4837 out:
4838 if (result == DBUS_HANDLER_RESULT_NEED_MEMORY)
4839 {
4840 _dbus_verbose ("out of memory\n");
4841
4842 /* Put message back, and we'll start over.
4843 * Yes this means handlers must be idempotent if they
4844 * don't return HANDLED; c'est la vie.
4845 */
4846 _dbus_connection_putback_message_link_unlocked (connection,
4847 message_link);
4848 /* now we don't want to free them */
4849 message_link = NULL;
4850 message = NULL;
4851 }
4852 else
4853 {
4854 _dbus_verbose (" ... done dispatching\n");
4855 }
4856
4857 _dbus_connection_release_dispatch (connection);
4858 HAVE_LOCK_CHECK (connection);
4859
4860 if (message != NULL)
4861 {
4862 /* We don't want this message to count in maximum message limits when
4863 * computing the dispatch status, below. We have to drop the lock
4864 * temporarily, because finalizing a message can trigger callbacks.
4865 *
4866 * We have a reference to the connection, and we don't use any cached
4867 * pointers to the connection's internals below this point, so it should
4868 * be safe to drop the lock and take it back. */
4869 CONNECTION_UNLOCK (connection);
4870 dbus_message_unref (message);
4871 CONNECTION_LOCK (connection);
4872 }
4873
4874 if (message_link != NULL)
4875 _dbus_list_free_link (message_link);
4876
4877 _dbus_verbose ("before final status update\n");
4878 status = _dbus_connection_get_dispatch_status_unlocked (connection);
4879
4880 /* unlocks and calls user code */
4881 _dbus_connection_update_dispatch_status_and_unlock (connection, status);
4882
4883 dbus_connection_unref (connection);
4884
4885 return status;
4886}
4887
4951 DBusAddWatchFunction add_function,
4952 DBusRemoveWatchFunction remove_function,
4953 DBusWatchToggledFunction toggled_function,
4954 void *data,
4955 DBusFreeFunction free_data_function)
4956{
4957 dbus_bool_t retval;
4958
4959 _dbus_return_val_if_fail (connection != NULL, FALSE);
4960
4961 CONNECTION_LOCK (connection);
4962
4963 retval = _dbus_watch_list_set_functions (connection->watches,
4964 add_function, remove_function,
4965 toggled_function,
4966 data, free_data_function);
4967
4968 CONNECTION_UNLOCK (connection);
4969
4970 return retval;
4971}
4972
5014 DBusAddTimeoutFunction add_function,
5015 DBusRemoveTimeoutFunction remove_function,
5016 DBusTimeoutToggledFunction toggled_function,
5017 void *data,
5018 DBusFreeFunction free_data_function)
5019{
5020 dbus_bool_t retval;
5021
5022 _dbus_return_val_if_fail (connection != NULL, FALSE);
5023
5024 CONNECTION_LOCK (connection);
5025
5026 retval = _dbus_timeout_list_set_functions (connection->timeouts,
5027 add_function, remove_function,
5028 toggled_function,
5029 data, free_data_function);
5030
5031 CONNECTION_UNLOCK (connection);
5032
5033 return retval;
5034}
5035
5050void
5052 DBusWakeupMainFunction wakeup_main_function,
5053 void *data,
5054 DBusFreeFunction free_data_function)
5055{
5056 void *old_data;
5057 DBusFreeFunction old_free_data;
5058
5059 _dbus_return_if_fail (connection != NULL);
5060
5061 CONNECTION_LOCK (connection);
5062 old_data = connection->wakeup_main_data;
5063 old_free_data = connection->free_wakeup_main_data;
5064
5065 connection->wakeup_main_function = wakeup_main_function;
5066 connection->wakeup_main_data = data;
5067 connection->free_wakeup_main_data = free_data_function;
5068
5069 CONNECTION_UNLOCK (connection);
5070
5071 /* Callback outside the lock */
5072 if (old_free_data)
5073 (*old_free_data) (old_data);
5074}
5075
5096void
5099 void *data,
5100 DBusFreeFunction free_data_function)
5101{
5102 void *old_data;
5103 DBusFreeFunction old_free_data;
5104
5105 _dbus_return_if_fail (connection != NULL);
5106
5107 CONNECTION_LOCK (connection);
5108 old_data = connection->dispatch_status_data;
5109 old_free_data = connection->free_dispatch_status_data;
5110
5111 connection->dispatch_status_function = function;
5112 connection->dispatch_status_data = data;
5113 connection->free_dispatch_status_data = free_data_function;
5114
5115 CONNECTION_UNLOCK (connection);
5116
5117 /* Callback outside the lock */
5118 if (old_free_data)
5119 (*old_free_data) (old_data);
5120}
5121
5143 int *fd)
5144{
5145 _dbus_return_val_if_fail (connection != NULL, FALSE);
5146 _dbus_return_val_if_fail (connection->transport != NULL, FALSE);
5147
5148#ifdef DBUS_WIN
5149 /* FIXME do this on a lower level */
5150 return FALSE;
5151#endif
5152
5153 return dbus_connection_get_socket(connection, fd);
5154}
5155
5173 int *fd)
5174{
5175 dbus_bool_t retval;
5176 DBusSocket s = DBUS_SOCKET_INIT;
5177
5178 _dbus_return_val_if_fail (connection != NULL, FALSE);
5179 _dbus_return_val_if_fail (connection->transport != NULL, FALSE);
5180
5181 CONNECTION_LOCK (connection);
5182
5183 retval = _dbus_transport_get_socket_fd (connection->transport, &s);
5184
5185 if (retval)
5186 {
5187 *fd = _dbus_socket_get_int (s);
5188 }
5189
5190 CONNECTION_UNLOCK (connection);
5191
5192 return retval;
5193}
5194
5195
5220 unsigned long *uid)
5221{
5222 dbus_bool_t result;
5223
5224 _dbus_return_val_if_fail (connection != NULL, FALSE);
5225 _dbus_return_val_if_fail (uid != NULL, FALSE);
5226
5227 CONNECTION_LOCK (connection);
5228
5230 result = FALSE;
5231 else
5232 result = _dbus_transport_get_unix_user (connection->transport,
5233 uid);
5234
5235#ifdef DBUS_WIN
5236 _dbus_assert (!result);
5237#endif
5238
5239 CONNECTION_UNLOCK (connection);
5240
5241 return result;
5242}
5243
5256 unsigned long *pid)
5257{
5258 dbus_bool_t result;
5259
5260 _dbus_return_val_if_fail (connection != NULL, FALSE);
5261 _dbus_return_val_if_fail (pid != NULL, FALSE);
5262
5263 CONNECTION_LOCK (connection);
5264
5266 result = FALSE;
5267 else
5268 result = _dbus_transport_get_unix_process_id (connection->transport,
5269 pid);
5270
5271 CONNECTION_UNLOCK (connection);
5272
5273 return result;
5274}
5275
5289 void **data,
5290 dbus_int32_t *data_size)
5291{
5292 dbus_bool_t result;
5293
5294 _dbus_return_val_if_fail (connection != NULL, FALSE);
5295 _dbus_return_val_if_fail (data != NULL, FALSE);
5296 _dbus_return_val_if_fail (data_size != NULL, FALSE);
5297
5298 CONNECTION_LOCK (connection);
5299
5301 result = FALSE;
5302 else
5304 data,
5305 data_size);
5306 CONNECTION_UNLOCK (connection);
5307
5308 return result;
5309}
5310
5333void
5336 void *data,
5337 DBusFreeFunction free_data_function)
5338{
5339 void *old_data = NULL;
5340 DBusFreeFunction old_free_function = NULL;
5341
5342 _dbus_return_if_fail (connection != NULL);
5343
5344 CONNECTION_LOCK (connection);
5346 function, data, free_data_function,
5347 &old_data, &old_free_function);
5348 CONNECTION_UNLOCK (connection);
5349
5350 if (old_free_function != NULL)
5351 (* old_free_function) (old_data);
5352}
5353
5354/* Same calling convention as dbus_connection_get_windows_user */
5356_dbus_connection_get_linux_security_label (DBusConnection *connection,
5357 char **label_p)
5358{
5359 dbus_bool_t result;
5360
5361 _dbus_assert (connection != NULL);
5362 _dbus_assert (label_p != NULL);
5363
5364 CONNECTION_LOCK (connection);
5365
5367 result = FALSE;
5368 else
5369 result = _dbus_transport_get_linux_security_label (connection->transport,
5370 label_p);
5371#ifndef __linux__
5372 _dbus_assert (!result);
5373#endif
5374
5375 CONNECTION_UNLOCK (connection);
5376
5377 return result;
5378}
5379
5381_dbus_connection_get_credentials (DBusConnection *connection)
5382{
5383 DBusCredentials *result;
5384
5385 _dbus_assert (connection != NULL);
5386
5387 CONNECTION_LOCK (connection);
5388
5390 result = NULL;
5391 else
5392 result = _dbus_transport_get_credentials (connection->transport);
5393
5394 CONNECTION_UNLOCK (connection);
5395
5396 return result;
5397}
5398
5432 char **windows_sid_p)
5433{
5434 dbus_bool_t result;
5435
5436 _dbus_return_val_if_fail (connection != NULL, FALSE);
5437 _dbus_return_val_if_fail (windows_sid_p != NULL, FALSE);
5438
5439 CONNECTION_LOCK (connection);
5440
5442 result = FALSE;
5443 else
5444 result = _dbus_transport_get_windows_user (connection->transport,
5445 windows_sid_p);
5446
5447#ifdef DBUS_UNIX
5448 _dbus_assert (!result);
5449#endif
5450
5451 CONNECTION_UNLOCK (connection);
5452
5453 return result;
5454}
5455
5477void
5480 void *data,
5481 DBusFreeFunction free_data_function)
5482{
5483 void *old_data = NULL;
5484 DBusFreeFunction old_free_function = NULL;
5485
5486 _dbus_return_if_fail (connection != NULL);
5487
5488 CONNECTION_LOCK (connection);
5490 function, data, free_data_function,
5491 &old_data, &old_free_function);
5492 CONNECTION_UNLOCK (connection);
5493
5494 if (old_free_function != NULL)
5495 (* old_free_function) (old_data);
5496}
5497
5524void
5526 dbus_bool_t value)
5527{
5528 _dbus_return_if_fail (connection != NULL);
5529
5530 CONNECTION_LOCK (connection);
5532 CONNECTION_UNLOCK (connection);
5533}
5534
5552void
5554 dbus_bool_t value)
5555{
5556 _dbus_return_if_fail (connection != NULL);
5557
5558 CONNECTION_LOCK (connection);
5559 connection->route_peer_messages = value;
5560 CONNECTION_UNLOCK (connection);
5561}
5562
5587 void *user_data,
5588 DBusFreeFunction free_data_function)
5589{
5590 DBusMessageFilter *filter;
5591
5592 _dbus_return_val_if_fail (connection != NULL, FALSE);
5593 _dbus_return_val_if_fail (function != NULL, FALSE);
5594
5595 filter = dbus_new0 (DBusMessageFilter, 1);
5596 if (filter == NULL)
5597 return FALSE;
5598
5599 _dbus_atomic_inc (&filter->refcount);
5600
5601 CONNECTION_LOCK (connection);
5602
5603 if (!_dbus_list_append (&connection->filter_list,
5604 filter))
5605 {
5606 _dbus_message_filter_unref (filter);
5607 CONNECTION_UNLOCK (connection);
5608 return FALSE;
5609 }
5610
5611 /* Fill in filter after all memory allocated,
5612 * so we don't run the free_user_data_function
5613 * if the add_filter() fails
5614 */
5615
5616 filter->function = function;
5617 filter->user_data = user_data;
5618 filter->free_user_data_function = free_data_function;
5619
5620 CONNECTION_UNLOCK (connection);
5621 return TRUE;
5622}
5623
5636void
5639 void *user_data)
5640{
5641 DBusList *link;
5642 DBusMessageFilter *filter;
5643
5644 _dbus_return_if_fail (connection != NULL);
5645 _dbus_return_if_fail (function != NULL);
5646
5647 CONNECTION_LOCK (connection);
5648
5649 filter = NULL;
5650
5651 link = _dbus_list_get_last_link (&connection->filter_list);
5652 while (link != NULL)
5653 {
5654 filter = link->data;
5655
5656 if (filter->function == function &&
5657 filter->user_data == user_data)
5658 {
5659 _dbus_list_remove_link (&connection->filter_list, link);
5660 filter->function = NULL;
5661
5662 break;
5663 }
5664
5665 link = _dbus_list_get_prev_link (&connection->filter_list, link);
5666 filter = NULL;
5667 }
5668
5669 CONNECTION_UNLOCK (connection);
5670
5671#ifndef DBUS_DISABLE_CHECKS
5672 if (filter == NULL)
5673 {
5674 _dbus_warn_check_failed ("Attempt to remove filter function %p user data %p, but no such filter has been added",
5675 function, user_data);
5676 return;
5677 }
5678#endif
5679
5680 /* Call application code */
5681 if (filter->free_user_data_function)
5682 (* filter->free_user_data_function) (filter->user_data);
5683
5684 filter->free_user_data_function = NULL;
5685 filter->user_data = NULL;
5686
5687 _dbus_message_filter_unref (filter);
5688}
5689
5705static dbus_bool_t
5706_dbus_connection_register_object_path (DBusConnection *connection,
5707 dbus_bool_t fallback,
5708 const char *path,
5709 const DBusObjectPathVTable *vtable,
5710 void *user_data,
5711 DBusError *error)
5712{
5713 char **decomposed_path;
5714 dbus_bool_t retval;
5715
5716 if (!_dbus_decompose_path (path, strlen (path), &decomposed_path, NULL))
5717 return FALSE;
5718
5719 CONNECTION_LOCK (connection);
5720
5721 retval = _dbus_object_tree_register (connection->objects,
5722 fallback,
5723 (const char **) decomposed_path, vtable,
5724 user_data, error);
5725
5726 CONNECTION_UNLOCK (connection);
5727
5728 dbus_free_string_array (decomposed_path);
5729
5730 return retval;
5731}
5732
5747 const char *path,
5748 const DBusObjectPathVTable *vtable,
5749 void *user_data,
5750 DBusError *error)
5751{
5752 _dbus_return_val_if_fail (connection != NULL, FALSE);
5753 _dbus_return_val_if_fail (path != NULL, FALSE);
5754 _dbus_return_val_if_fail (path[0] == '/', FALSE);
5755 _dbus_return_val_if_fail (vtable != NULL, FALSE);
5756
5757 return _dbus_connection_register_object_path (connection, FALSE, path, vtable, user_data, error);
5758}
5759
5777 const char *path,
5778 const DBusObjectPathVTable *vtable,
5779 void *user_data)
5780{
5781 dbus_bool_t retval;
5782 DBusError error = DBUS_ERROR_INIT;
5783
5784 _dbus_return_val_if_fail (connection != NULL, FALSE);
5785 _dbus_return_val_if_fail (path != NULL, FALSE);
5786 _dbus_return_val_if_fail (path[0] == '/', FALSE);
5787 _dbus_return_val_if_fail (vtable != NULL, FALSE);
5788
5789 retval = _dbus_connection_register_object_path (connection, FALSE, path, vtable, user_data, &error);
5790
5792 {
5793 _dbus_warn ("%s", error.message);
5794 dbus_error_free (&error);
5795 return FALSE;
5796 }
5797
5798 return retval;
5799}
5800
5817 const char *path,
5818 const DBusObjectPathVTable *vtable,
5819 void *user_data,
5820 DBusError *error)
5821{
5822 _dbus_return_val_if_fail (connection != NULL, FALSE);
5823 _dbus_return_val_if_fail (path != NULL, FALSE);
5824 _dbus_return_val_if_fail (path[0] == '/', FALSE);
5825 _dbus_return_val_if_fail (vtable != NULL, FALSE);
5826
5827 return _dbus_connection_register_object_path (connection, TRUE, path, vtable, user_data, error);
5828}
5829
5849 const char *path,
5850 const DBusObjectPathVTable *vtable,
5851 void *user_data)
5852{
5853 dbus_bool_t retval;
5854 DBusError error = DBUS_ERROR_INIT;
5855
5856 _dbus_return_val_if_fail (connection != NULL, FALSE);
5857 _dbus_return_val_if_fail (path != NULL, FALSE);
5858 _dbus_return_val_if_fail (path[0] == '/', FALSE);
5859 _dbus_return_val_if_fail (vtable != NULL, FALSE);
5860
5861 retval = _dbus_connection_register_object_path (connection, TRUE, path, vtable, user_data, &error);
5862
5864 {
5865 _dbus_warn ("%s", error.message);
5866 dbus_error_free (&error);
5867 return FALSE;
5868 }
5869
5870 return retval;
5871}
5872
5884 const char *path)
5885{
5886 char **decomposed_path;
5887
5888 _dbus_return_val_if_fail (connection != NULL, FALSE);
5889 _dbus_return_val_if_fail (path != NULL, FALSE);
5890 _dbus_return_val_if_fail (path[0] == '/', FALSE);
5891
5892 if (!_dbus_decompose_path (path, strlen (path), &decomposed_path, NULL))
5893 return FALSE;
5894
5895 CONNECTION_LOCK (connection);
5896
5897 _dbus_object_tree_unregister_and_unlock (connection->objects, (const char **) decomposed_path);
5898
5899 dbus_free_string_array (decomposed_path);
5900
5901 return TRUE;
5902}
5903
5916 const char *path,
5917 void **data_p)
5918{
5919 char **decomposed_path;
5920
5921 _dbus_return_val_if_fail (connection != NULL, FALSE);
5922 _dbus_return_val_if_fail (path != NULL, FALSE);
5923 _dbus_return_val_if_fail (data_p != NULL, FALSE);
5924
5925 *data_p = NULL;
5926
5927 if (!_dbus_decompose_path (path, strlen (path), &decomposed_path, NULL))
5928 return FALSE;
5929
5930 CONNECTION_LOCK (connection);
5931
5932 *data_p = _dbus_object_tree_get_user_data_unlocked (connection->objects, (const char**) decomposed_path);
5933
5934 CONNECTION_UNLOCK (connection);
5935
5936 dbus_free_string_array (decomposed_path);
5937
5938 return TRUE;
5939}
5940
5953 const char *parent_path,
5954 char ***child_entries)
5955{
5956 char **decomposed_path;
5957 dbus_bool_t retval;
5958 _dbus_return_val_if_fail (connection != NULL, FALSE);
5959 _dbus_return_val_if_fail (parent_path != NULL, FALSE);
5960 _dbus_return_val_if_fail (parent_path[0] == '/', FALSE);
5961 _dbus_return_val_if_fail (child_entries != NULL, FALSE);
5962
5963 if (!_dbus_decompose_path (parent_path, strlen (parent_path), &decomposed_path, NULL))
5964 return FALSE;
5965
5966 CONNECTION_LOCK (connection);
5967
5969 (const char **) decomposed_path,
5970 child_entries);
5971 dbus_free_string_array (decomposed_path);
5972
5973 return retval;
5974}
5975
5976static DBusDataSlotAllocator slot_allocator =
5977 _DBUS_DATA_SLOT_ALLOCATOR_INIT (_DBUS_LOCK_NAME (connection_slots));
5978
5995{
5996 return _dbus_data_slot_allocator_alloc (&slot_allocator,
5997 slot_p);
5998}
5999
6011void
6013{
6014 _dbus_return_if_fail (*slot_p >= 0);
6015
6016 _dbus_data_slot_allocator_free (&slot_allocator, slot_p);
6017}
6018
6043 dbus_int32_t slot,
6044 void *data,
6045 DBusFreeFunction free_data_func)
6046{
6047 DBusFreeFunction old_free_func;
6048 void *old_data;
6049 dbus_bool_t retval;
6050
6051 _dbus_return_val_if_fail (connection != NULL, FALSE);
6052 _dbus_return_val_if_fail (slot >= 0, FALSE);
6053
6054 SLOTS_LOCK (connection);
6055
6056 retval = _dbus_data_slot_list_set (&slot_allocator,
6057 &connection->slot_list,
6058 slot, data, free_data_func,
6059 &old_free_func, &old_data);
6060
6061 SLOTS_UNLOCK (connection);
6062
6063 if (retval)
6064 {
6065 /* Do the actual free outside the connection lock */
6066 if (old_free_func)
6067 (* old_free_func) (old_data);
6068 }
6069
6070 return retval;
6071}
6072
6090void*
6092 dbus_int32_t slot)
6093{
6094 void *res;
6095
6096 _dbus_return_val_if_fail (connection != NULL, NULL);
6097 _dbus_return_val_if_fail (slot >= 0, NULL);
6098
6099 SLOTS_LOCK (connection);
6100
6101 res = _dbus_data_slot_list_get (&slot_allocator,
6102 &connection->slot_list,
6103 slot);
6104
6105 SLOTS_UNLOCK (connection);
6106
6107 return res;
6108}
6109
6116void
6118{
6119 if (will_modify_sigpipe)
6120 _dbus_atomic_set_nonzero (&_dbus_modify_sigpipe);
6121 else
6122 _dbus_atomic_set_zero (&_dbus_modify_sigpipe);
6123}
6124
6133void
6135 long size)
6136{
6137 _dbus_return_if_fail (connection != NULL);
6138
6139 CONNECTION_LOCK (connection);
6141 size);
6142 CONNECTION_UNLOCK (connection);
6143}
6144
6151long
6153{
6154 long res;
6155
6156 _dbus_return_val_if_fail (connection != NULL, 0);
6157
6158 CONNECTION_LOCK (connection);
6160 CONNECTION_UNLOCK (connection);
6161 return res;
6162}
6163
6172void
6174 long n)
6175{
6176 _dbus_return_if_fail (connection != NULL);
6177
6178 CONNECTION_LOCK (connection);
6180 n);
6181 CONNECTION_UNLOCK (connection);
6182}
6183
6190long
6192{
6193 long res;
6194
6195 _dbus_return_val_if_fail (connection != NULL, 0);
6196
6197 CONNECTION_LOCK (connection);
6199 CONNECTION_UNLOCK (connection);
6200 return res;
6201}
6202
6228void
6230 long size)
6231{
6232 _dbus_return_if_fail (connection != NULL);
6233
6234 CONNECTION_LOCK (connection);
6236 size);
6237 CONNECTION_UNLOCK (connection);
6238}
6239
6246long
6248{
6249 long res;
6250
6251 _dbus_return_val_if_fail (connection != NULL, 0);
6252
6253 CONNECTION_LOCK (connection);
6255 CONNECTION_UNLOCK (connection);
6256 return res;
6257}
6258
6270void
6272 long n)
6273{
6274 _dbus_return_if_fail (connection != NULL);
6275
6276 CONNECTION_LOCK (connection);
6278 n);
6279 CONNECTION_UNLOCK (connection);
6280}
6281
6288long
6290{
6291 long res;
6292
6293 _dbus_return_val_if_fail (connection != NULL, 0);
6294
6295 CONNECTION_LOCK (connection);
6297 CONNECTION_UNLOCK (connection);
6298 return res;
6299}
6300
6311long
6313{
6314 long res;
6315
6316 _dbus_return_val_if_fail (connection != NULL, 0);
6317
6318 CONNECTION_LOCK (connection);
6320 CONNECTION_UNLOCK (connection);
6321 return res;
6322}
6323
6324#ifdef DBUS_ENABLE_STATS
6325void
6326_dbus_connection_get_stats (DBusConnection *connection,
6327 dbus_uint32_t *in_messages,
6328 dbus_uint32_t *in_bytes,
6329 dbus_uint32_t *in_fds,
6330 dbus_uint32_t *in_peak_bytes,
6331 dbus_uint32_t *in_peak_fds,
6332 dbus_uint32_t *out_messages,
6333 dbus_uint32_t *out_bytes,
6334 dbus_uint32_t *out_fds,
6335 dbus_uint32_t *out_peak_bytes,
6336 dbus_uint32_t *out_peak_fds)
6337{
6338 CONNECTION_LOCK (connection);
6339
6340 if (in_messages != NULL)
6341 *in_messages = connection->n_incoming;
6342
6343 _dbus_transport_get_stats (connection->transport,
6344 in_bytes, in_fds, in_peak_bytes, in_peak_fds);
6345
6346 if (out_messages != NULL)
6347 *out_messages = connection->n_outgoing;
6348
6349 if (out_bytes != NULL)
6350 *out_bytes = _dbus_counter_get_size_value (connection->outgoing_counter);
6351
6352 if (out_fds != NULL)
6353 *out_fds = _dbus_counter_get_unix_fd_value (connection->outgoing_counter);
6354
6355 if (out_peak_bytes != NULL)
6356 *out_peak_bytes = _dbus_counter_get_peak_size_value (connection->outgoing_counter);
6357
6358 if (out_peak_fds != NULL)
6359 *out_peak_fds = _dbus_counter_get_peak_unix_fd_value (connection->outgoing_counter);
6360
6361 CONNECTION_UNLOCK (connection);
6362}
6363#endif /* DBUS_ENABLE_STATS */
6364
6372long
6374{
6375 long res;
6376
6377 _dbus_return_val_if_fail (connection != NULL, 0);
6378
6379 CONNECTION_LOCK (connection);
6381 CONNECTION_UNLOCK (connection);
6382 return res;
6383}
6384
6385#ifdef DBUS_ENABLE_EMBEDDED_TESTS
6392const char*
6393_dbus_connection_get_address (DBusConnection *connection)
6394{
6395 return _dbus_transport_get_address (connection->transport);
6396}
6397#endif
6398
void dbus_address_entries_free(DBusAddressEntry **entries)
Frees a NULL-terminated array of address entries.
Definition: dbus-address.c:192
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:366
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:247
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:388
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:70
#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:1460
void * _dbus_hash_iter_get_value(DBusHashIter *iter)
Gets the value of the current entry.
Definition: dbus-hash.c:619
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:1311
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:1277
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:367
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:549
void _dbus_hash_iter_init(DBusHashTable *table, DBusHashIter *iter)
Initializes a hash table iterator.
Definition: dbus-hash.c:523
DBusHashTable * _dbus_hash_table_new(DBusHashType type, DBusFreeFunction key_free_function, DBusFreeFunction value_free_function)
Constructs a new hash table.
Definition: dbus-hash.c:291
dbus_bool_t _dbus_hash_table_remove_int(DBusHashTable *table, int key)
Removes the hash entry for the given key.
Definition: dbus-hash.c:1214
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:1186
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:1112
void _dbus_hash_iter_remove_entry(DBusHashIter *iter)
Removes the current entry from the hash table.
Definition: dbus-hash.c:598
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:1137
@ DBUS_HASH_INT
Hash keys are integers.
Definition: dbus-hash.h:68
@ DBUS_HASH_STRING
Hash keys are strings.
Definition: dbus-hash.h:67
#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...
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:595
dbus_bool_t _dbus_list_copy(DBusList **list, DBusList **dest)
Copies a list.
Definition: dbus-list.c:725
DBusList * _dbus_list_pop_first_link(DBusList **list)
Removes the first link in the list and returns it.
Definition: dbus-list.c:656
void * _dbus_list_get_last(DBusList **list)
Gets the last data in the list.
Definition: dbus-list.c:624
dbus_bool_t _dbus_list_remove(DBusList **list, void *data)
Removes a value from the list.
Definition: dbus-list.c:416
void _dbus_list_append_link(DBusList **list, DBusList *link)
Appends a link to the list.
Definition: dbus-list.c:316
void _dbus_list_clear_full(DBusList **list, DBusFreeFunction function)
Free every link and every element in the list.
Definition: dbus-list.c:568
void _dbus_list_remove_link(DBusList **list, DBusList *link)
Removes a link from the list.
Definition: dbus-list.c:528
void * _dbus_list_get_first(DBusList **list)
Gets the first data in the list.
Definition: dbus-list.c:640
DBusList * _dbus_list_get_last_link(DBusList **list)
Gets the last link in the list.
Definition: dbus-list.c:608
void _dbus_list_unlink(DBusList **list, DBusList *link)
Removes the given link from the list, but doesn't free it.
Definition: dbus-list.c:500
#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:120
void _dbus_list_free_link(DBusList *link)
Frees a linked list node allocated with _dbus_list_alloc_link.
Definition: dbus-list.c:255
void * _dbus_list_pop_first(DBusList **list)
Removes the first value in the list and returns it.
Definition: dbus-list.c:677
void _dbus_list_foreach(DBusList **list, DBusForeachFunction function, void *data)
Calls the given function for each element in the list.
Definition: dbus-list.c:787
void _dbus_list_clear(DBusList **list)
Frees all links in the list and sets the list head to NULL.
Definition: dbus-list.c:543
void _dbus_list_prepend_link(DBusList **list, DBusList *link)
Prepends a link to the list.
Definition: dbus-list.c:334
dbus_bool_t _dbus_list_prepend(DBusList **list, void *data)
Prepends a value to the list.
Definition: dbus-list.c:293
DBusList * _dbus_list_alloc_link(void *data)
Allocates a linked list node.
Definition: dbus-list.c:243
dbus_bool_t _dbus_list_append(DBusList **list, void *data)
Appends a value to the list.
Definition: dbus-list.c:271
#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:119
#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:772
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:801
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:692
#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:740
void dbus_message_set_serial(DBusMessage *message, dbus_uint32_t serial)
Sets the serial number of a message.
Definition: dbus-message.c:299
void dbus_message_lock(DBusMessage *message)
Locks a message.
Definition: dbus-message.c:429
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:397
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:325
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:180
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init(), and fills it with the same contents as #_DBUS_STRING_I...
Definition: dbus-string.c:276
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:1145
const char * _dbus_string_get_const_data(const DBusString *str)
Gets the raw character buffer from a const string.
Definition: dbus-string.c:511
void _dbus_exit(int code)
Exit the process, returning the given value.
void _dbus_atomic_set_nonzero(DBusAtomic *atomic)
Atomically set the value of an integer to something nonzero.
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.
void _dbus_atomic_set_zero(DBusAtomic *atomic)
Atomically set the value of an integer to 0.
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:54
void _dbus_cmutex_free_at_location(DBusCMutex **location_p)
Frees a DBusCMutex; does nothing if passed a NULL pointer.
Definition: dbus-threads.c:108
void _dbus_condvar_free_at_location(DBusCondVar **location_p)
Frees a condition variable; does nothing if passed a NULL pointer.
Definition: dbus-threads.c:225
DBUS_PRIVATE_EXPORT void _dbus_rmutex_unlock(DBusRMutex *mutex)
Unlocks a mutex.
Definition: dbus-threads.c:151
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:241
void _dbus_condvar_new_at_location(DBusCondVar **location_p)
This does the same thing as _dbus_condvar_new.
Definition: dbus-threads.c:200
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:78
void _dbus_condvar_wake_one(DBusCondVar *cond)
If there are threads waiting on the condition variable, wake up exactly one.
Definition: dbus-threads.c:279
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:262
void _dbus_cmutex_lock(DBusCMutex *mutex)
Locks a mutex.
Definition: dbus-threads.c:137
void _dbus_cmutex_unlock(DBusCMutex *mutex)
Unlocks a mutex.
Definition: dbus-threads.c:165
void _dbus_rmutex_free_at_location(DBusRMutex **location_p)
Frees a DBusRMutex; does nothing if passed a NULL pointer.
Definition: dbus-threads.c:95
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:312
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:364
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:241
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:342
DBUS_EXPORT int dbus_timeout_get_interval(DBusTimeout *timeout)
Gets the timeout interval.
Definition: dbus-timeout.c:442
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().
DBusCredentials * _dbus_transport_get_credentials(DBusTransport *transport)
If the transport has already been authenticated, return its credentials.
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:381
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:441
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:295
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:414
Internals of DBusAddressEntry.
Definition: dbus-address.c:47
An atomic integer safe to increment or decrement from multiple threads.
Definition: dbus-sysdeps.h:321
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.