D-Bus  1.6.12
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 
206 #ifdef DBUS_ENABLE_VERBOSE_MODE
207 static void
208 _dbus_connection_trace_ref (DBusConnection *connection,
209  int old_refcount,
210  int new_refcount,
211  const char *why)
212 {
213  static int enabled = -1;
214 
215  _dbus_trace_ref ("DBusConnection", connection, old_refcount, new_refcount,
216  why, "DBUS_CONNECTION_TRACE", &enabled);
217 }
218 #else
219 #define _dbus_connection_trace_ref(c,o,n,w) \
220  do \
221  {\
222  (void) (o); \
223  (void) (n); \
224  } while (0)
225 #endif
226 
231 
236 {
239  void *user_data;
241 };
242 
243 
248 {
252 };
253 
254 #if HAVE_DECL_MSG_NOSIGNAL
255 static dbus_bool_t _dbus_modify_sigpipe = FALSE;
256 #else
257 static dbus_bool_t _dbus_modify_sigpipe = TRUE;
258 #endif
259 
264 {
313  char *server_guid;
315  /* These two MUST be bools and not bitfields, because they are protected by a separate lock
316  * from connection->mutex and all bitfields in a word have to be read/written together.
317  * So you can't have a different lock for different bitfields in the same word.
318  */
322  unsigned int shareable : 1;
324  unsigned int exit_on_disconnect : 1;
326  unsigned int route_peer_messages : 1;
328  unsigned int disconnected_message_arrived : 1;
336 #ifndef DBUS_DISABLE_CHECKS
337  unsigned int have_connection_lock : 1;
338 #endif
339 
340 #ifndef DBUS_DISABLE_CHECKS
342 #endif
343 };
344 
345 static DBusDispatchStatus _dbus_connection_get_dispatch_status_unlocked (DBusConnection *connection);
346 static void _dbus_connection_update_dispatch_status_and_unlock (DBusConnection *connection,
347  DBusDispatchStatus new_status);
348 static void _dbus_connection_last_unref (DBusConnection *connection);
349 static void _dbus_connection_acquire_dispatch (DBusConnection *connection);
350 static void _dbus_connection_release_dispatch (DBusConnection *connection);
351 static DBusDispatchStatus _dbus_connection_flush_unlocked (DBusConnection *connection);
352 static void _dbus_connection_close_possibly_shared_and_unlock (DBusConnection *connection);
353 static dbus_bool_t _dbus_connection_get_is_connected_unlocked (DBusConnection *connection);
354 static dbus_bool_t _dbus_connection_peek_for_reply_unlocked (DBusConnection *connection,
355  dbus_uint32_t client_serial);
356 
357 static DBusMessageFilter *
358 _dbus_message_filter_ref (DBusMessageFilter *filter)
359 {
360 #ifdef DBUS_DISABLE_ASSERT
361  _dbus_atomic_inc (&filter->refcount);
362 #else
363  dbus_int32_t old_value;
364 
365  old_value = _dbus_atomic_inc (&filter->refcount);
366  _dbus_assert (old_value > 0);
367 #endif
368 
369  return filter;
370 }
371 
372 static void
373 _dbus_message_filter_unref (DBusMessageFilter *filter)
374 {
375  dbus_int32_t old_value;
376 
377  old_value = _dbus_atomic_dec (&filter->refcount);
378  _dbus_assert (old_value > 0);
379 
380  if (old_value == 1)
381  {
382  if (filter->free_user_data_function)
383  (* filter->free_user_data_function) (filter->user_data);
384 
385  dbus_free (filter);
386  }
387 }
388 
394 void
396 {
397  CONNECTION_LOCK (connection);
398 }
399 
405 void
407 {
408  DBusList *expired_messages;
409  DBusList *iter;
410 
411  if (TRACE_LOCKS)
412  {
413  _dbus_verbose ("UNLOCK\n");
414  }
415 
416  /* If we had messages that expired (fell off the incoming or outgoing
417  * queues) while we were locked, actually release them now */
418  expired_messages = connection->expired_messages;
419  connection->expired_messages = NULL;
420 
421  RELEASING_LOCK_CHECK (connection);
422  _dbus_rmutex_unlock (connection->mutex);
423 
424  for (iter = _dbus_list_pop_first_link (&expired_messages);
425  iter != NULL;
426  iter = _dbus_list_pop_first_link (&expired_messages))
427  {
428  DBusMessage *message = iter->data;
429 
430  dbus_message_unref (message);
431  _dbus_list_free_link (iter);
432  }
433 }
434 
442 static void
443 _dbus_connection_wakeup_mainloop (DBusConnection *connection)
444 {
445  if (connection->wakeup_main_function)
446  (*connection->wakeup_main_function) (connection->wakeup_main_data);
447 }
448 
449 #ifdef DBUS_BUILD_TESTS
450 
462 void
463 _dbus_connection_test_get_locks (DBusConnection *connection,
464  DBusMutex **mutex_loc,
465  DBusMutex **dispatch_mutex_loc,
466  DBusMutex **io_path_mutex_loc,
467  DBusCondVar **dispatch_cond_loc,
468  DBusCondVar **io_path_cond_loc)
469 {
470  *mutex_loc = (DBusMutex *) connection->mutex;
471  *dispatch_mutex_loc = (DBusMutex *) connection->dispatch_mutex;
472  *io_path_mutex_loc = (DBusMutex *) connection->io_path_mutex;
473  *dispatch_cond_loc = connection->dispatch_cond;
474  *io_path_cond_loc = connection->io_path_cond;
475 }
476 #endif
477 
486 void
488  DBusList *link)
489 {
490  DBusPendingCall *pending;
491  dbus_uint32_t reply_serial;
492  DBusMessage *message;
493 
495 
497  link);
498  message = link->data;
499 
500  /* If this is a reply we're waiting on, remove timeout for it */
501  reply_serial = dbus_message_get_reply_serial (message);
502  if (reply_serial != 0)
503  {
504  pending = _dbus_hash_table_lookup_int (connection->pending_replies,
505  reply_serial);
506  if (pending != NULL)
507  {
511 
513  }
514  }
515 
516 
517 
518  connection->n_incoming += 1;
519 
520  _dbus_connection_wakeup_mainloop (connection);
521 
522  _dbus_verbose ("Message %p (%s %s %s %s '%s' reply to %u) added to incoming queue %p, %d incoming\n",
523  message,
525  dbus_message_get_path (message) ?
526  dbus_message_get_path (message) :
527  "no path",
528  dbus_message_get_interface (message) ?
529  dbus_message_get_interface (message) :
530  "no interface",
531  dbus_message_get_member (message) ?
532  dbus_message_get_member (message) :
533  "no member",
534  dbus_message_get_signature (message),
536  connection,
537  connection->n_incoming);
538 
539  _dbus_message_trace_ref (message, -1, -1,
540  "_dbus_conection_queue_received_message_link");
541 }
542 
551 void
553  DBusList *link)
554 {
555  HAVE_LOCK_CHECK (connection);
556 
557  _dbus_list_append_link (&connection->incoming_messages, link);
558 
559  connection->n_incoming += 1;
560 
561  _dbus_connection_wakeup_mainloop (connection);
562 
563  _dbus_message_trace_ref (link->data, -1, -1,
564  "_dbus_connection_queue_synthesized_message_link");
565 
566  _dbus_verbose ("Synthesized message %p added to incoming queue %p, %d incoming\n",
567  link->data, connection, connection->n_incoming);
568 }
569 
570 
580 {
581  HAVE_LOCK_CHECK (connection);
582  return connection->outgoing_messages != NULL;
583 }
584 
596 {
597  dbus_bool_t v;
598 
599  _dbus_return_val_if_fail (connection != NULL, FALSE);
600 
601  CONNECTION_LOCK (connection);
603  CONNECTION_UNLOCK (connection);
604 
605  return v;
606 }
607 
617 {
618  HAVE_LOCK_CHECK (connection);
619 
620  return _dbus_list_get_last (&connection->outgoing_messages);
621 }
622 
631 void
633  DBusMessage *message)
634 {
635  DBusList *link;
636 
637  HAVE_LOCK_CHECK (connection);
638 
639  /* This can be called before we even complete authentication, since
640  * it's called on disconnect to clean up the outgoing queue.
641  * It's also called as we successfully send each message.
642  */
643 
644  link = _dbus_list_get_last_link (&connection->outgoing_messages);
645  _dbus_assert (link != NULL);
646  _dbus_assert (link->data == message);
647 
648  _dbus_list_unlink (&connection->outgoing_messages,
649  link);
650  _dbus_list_prepend_link (&connection->expired_messages, link);
651 
652  connection->n_outgoing -= 1;
653 
654  _dbus_verbose ("Message %p (%s %s %s %s '%s') removed from outgoing queue %p, %d left to send\n",
655  message,
657  dbus_message_get_path (message) ?
658  dbus_message_get_path (message) :
659  "no path",
660  dbus_message_get_interface (message) ?
661  dbus_message_get_interface (message) :
662  "no interface",
663  dbus_message_get_member (message) ?
664  dbus_message_get_member (message) :
665  "no member",
666  dbus_message_get_signature (message),
667  connection, connection->n_outgoing);
668 
669  /* It's OK that in principle we call the notify function, because for the
670  * outgoing limit, there isn't one */
671  _dbus_message_remove_counter (message, connection->outgoing_counter);
672 
673  /* The message will actually be unreffed when we unlock */
674 }
675 
678  DBusWatch *watch);
680 typedef void (* DBusWatchRemoveFunction) (DBusWatchList *list,
681  DBusWatch *watch);
683 typedef void (* DBusWatchToggleFunction) (DBusWatchList *list,
684  DBusWatch *watch,
685  dbus_bool_t enabled);
686 
687 static dbus_bool_t
688 protected_change_watch (DBusConnection *connection,
689  DBusWatch *watch,
690  DBusWatchAddFunction add_function,
691  DBusWatchRemoveFunction remove_function,
692  DBusWatchToggleFunction toggle_function,
693  dbus_bool_t enabled)
694 {
695  dbus_bool_t retval;
696 
697  HAVE_LOCK_CHECK (connection);
698 
699  /* The original purpose of protected_change_watch() was to hold a
700  * ref on the connection while dropping the connection lock, then
701  * calling out to the app. This was a broken hack that did not
702  * work, since the connection was in a hosed state (no WatchList
703  * field) while calling out.
704  *
705  * So for now we'll just keep the lock while calling out. This means
706  * apps are not allowed to call DBusConnection methods inside a
707  * watch function or they will deadlock.
708  *
709  * The "real fix" is to use the _and_unlock() pattern found
710  * elsewhere in the code, to defer calling out to the app until
711  * we're about to drop locks and return flow of control to the app
712  * anyway.
713  *
714  * See http://lists.freedesktop.org/archives/dbus/2007-July/thread.html#8144
715  */
716 
717  if (connection->watches)
718  {
719  if (add_function)
720  retval = (* add_function) (connection->watches, watch);
721  else if (remove_function)
722  {
723  retval = TRUE;
724  (* remove_function) (connection->watches, watch);
725  }
726  else
727  {
728  retval = TRUE;
729  (* toggle_function) (connection->watches, watch, enabled);
730  }
731  return retval;
732  }
733  else
734  return FALSE;
735 }
736 
737 
751  DBusWatch *watch)
752 {
753  return protected_change_watch (connection, watch,
755  NULL, NULL, FALSE);
756 }
757 
767 void
769  DBusWatch *watch)
770 {
771  protected_change_watch (connection, watch,
772  NULL,
774  NULL, FALSE);
775 }
776 
787 void
789  DBusWatch *watch,
790  dbus_bool_t enabled)
791 {
792  _dbus_assert (watch != NULL);
793 
794  protected_change_watch (connection, watch,
795  NULL, NULL,
797  enabled);
798 }
799 
802  DBusTimeout *timeout);
805  DBusTimeout *timeout);
808  DBusTimeout *timeout,
809  dbus_bool_t enabled);
810 
811 static dbus_bool_t
812 protected_change_timeout (DBusConnection *connection,
813  DBusTimeout *timeout,
814  DBusTimeoutAddFunction add_function,
815  DBusTimeoutRemoveFunction remove_function,
816  DBusTimeoutToggleFunction toggle_function,
817  dbus_bool_t enabled)
818 {
819  dbus_bool_t retval;
820 
821  HAVE_LOCK_CHECK (connection);
822 
823  /* The original purpose of protected_change_timeout() was to hold a
824  * ref on the connection while dropping the connection lock, then
825  * calling out to the app. This was a broken hack that did not
826  * work, since the connection was in a hosed state (no TimeoutList
827  * field) while calling out.
828  *
829  * So for now we'll just keep the lock while calling out. This means
830  * apps are not allowed to call DBusConnection methods inside a
831  * timeout function or they will deadlock.
832  *
833  * The "real fix" is to use the _and_unlock() pattern found
834  * elsewhere in the code, to defer calling out to the app until
835  * we're about to drop locks and return flow of control to the app
836  * anyway.
837  *
838  * See http://lists.freedesktop.org/archives/dbus/2007-July/thread.html#8144
839  */
840 
841  if (connection->timeouts)
842  {
843  if (add_function)
844  retval = (* add_function) (connection->timeouts, timeout);
845  else if (remove_function)
846  {
847  retval = TRUE;
848  (* remove_function) (connection->timeouts, timeout);
849  }
850  else
851  {
852  retval = TRUE;
853  (* toggle_function) (connection->timeouts, timeout, enabled);
854  }
855  return retval;
856  }
857  else
858  return FALSE;
859 }
860 
875  DBusTimeout *timeout)
876 {
877  return protected_change_timeout (connection, timeout,
879  NULL, NULL, FALSE);
880 }
881 
891 void
893  DBusTimeout *timeout)
894 {
895  protected_change_timeout (connection, timeout,
896  NULL,
898  NULL, FALSE);
899 }
900 
911 void
913  DBusTimeout *timeout,
914  dbus_bool_t enabled)
915 {
916  protected_change_timeout (connection, timeout,
917  NULL, NULL,
919  enabled);
920 }
921 
922 static dbus_bool_t
923 _dbus_connection_attach_pending_call_unlocked (DBusConnection *connection,
924  DBusPendingCall *pending)
925 {
926  dbus_uint32_t reply_serial;
927  DBusTimeout *timeout;
928 
929  HAVE_LOCK_CHECK (connection);
930 
931  reply_serial = _dbus_pending_call_get_reply_serial_unlocked (pending);
932 
933  _dbus_assert (reply_serial != 0);
934 
935  timeout = _dbus_pending_call_get_timeout_unlocked (pending);
936 
937  if (timeout)
938  {
939  if (!_dbus_connection_add_timeout_unlocked (connection, timeout))
940  return FALSE;
941 
943  reply_serial,
944  pending))
945  {
946  _dbus_connection_remove_timeout_unlocked (connection, timeout);
947 
949  HAVE_LOCK_CHECK (connection);
950  return FALSE;
951  }
952 
954  }
955  else
956  {
958  reply_serial,
959  pending))
960  {
961  HAVE_LOCK_CHECK (connection);
962  return FALSE;
963  }
964  }
965 
967 
968  HAVE_LOCK_CHECK (connection);
969 
970  return TRUE;
971 }
972 
973 static void
974 free_pending_call_on_hash_removal (void *data)
975 {
976  DBusPendingCall *pending;
977  DBusConnection *connection;
978 
979  if (data == NULL)
980  return;
981 
982  pending = data;
983 
984  connection = _dbus_pending_call_get_connection_unlocked (pending);
985 
986  HAVE_LOCK_CHECK (connection);
987 
989  {
992 
994  }
995 
996  /* FIXME 1.0? this is sort of dangerous and undesirable to drop the lock
997  * here, but the pending call finalizer could in principle call out to
998  * application code so we pretty much have to... some larger code reorg
999  * might be needed.
1000  */
1001  _dbus_connection_ref_unlocked (connection);
1003  CONNECTION_LOCK (connection);
1004  _dbus_connection_unref_unlocked (connection);
1005 }
1006 
1007 static void
1008 _dbus_connection_detach_pending_call_unlocked (DBusConnection *connection,
1009  DBusPendingCall *pending)
1010 {
1011  /* This ends up unlocking to call the pending call finalizer, which is unexpected to
1012  * say the least.
1013  */
1016 }
1017 
1018 static void
1019 _dbus_connection_detach_pending_call_and_unlock (DBusConnection *connection,
1020  DBusPendingCall *pending)
1021 {
1022  /* The idea here is to avoid finalizing the pending call
1023  * with the lock held, since there's a destroy notifier
1024  * in pending call that goes out to application code.
1025  *
1026  * There's an extra unlock inside the hash table
1027  * "free pending call" function FIXME...
1028  */
1032 
1036 
1038 
1040 }
1041 
1050 void
1052  DBusPendingCall *pending)
1053 {
1054  CONNECTION_LOCK (connection);
1055  _dbus_connection_detach_pending_call_and_unlock (connection, pending);
1056 }
1057 
1067 static dbus_bool_t
1068 _dbus_connection_acquire_io_path (DBusConnection *connection,
1069  int timeout_milliseconds)
1070 {
1071  dbus_bool_t we_acquired;
1072 
1073  HAVE_LOCK_CHECK (connection);
1074 
1075  /* We don't want the connection to vanish */
1076  _dbus_connection_ref_unlocked (connection);
1077 
1078  /* We will only touch io_path_acquired which is protected by our mutex */
1079  CONNECTION_UNLOCK (connection);
1080 
1081  _dbus_verbose ("locking io_path_mutex\n");
1082  _dbus_cmutex_lock (connection->io_path_mutex);
1083 
1084  _dbus_verbose ("start connection->io_path_acquired = %d timeout = %d\n",
1085  connection->io_path_acquired, timeout_milliseconds);
1086 
1087  we_acquired = FALSE;
1088 
1089  if (connection->io_path_acquired)
1090  {
1091  if (timeout_milliseconds != -1)
1092  {
1093  _dbus_verbose ("waiting %d for IO path to be acquirable\n",
1094  timeout_milliseconds);
1095 
1096  if (!_dbus_condvar_wait_timeout (connection->io_path_cond,
1097  connection->io_path_mutex,
1098  timeout_milliseconds))
1099  {
1100  /* We timed out before anyone signaled. */
1101  /* (writing the loop to handle the !timedout case by
1102  * waiting longer if needed is a pain since dbus
1103  * wraps pthread_cond_timedwait to take a relative
1104  * time instead of absolute, something kind of stupid
1105  * on our part. for now it doesn't matter, we will just
1106  * end up back here eventually.)
1107  */
1108  }
1109  }
1110  else
1111  {
1112  while (connection->io_path_acquired)
1113  {
1114  _dbus_verbose ("waiting for IO path to be acquirable\n");
1115  _dbus_condvar_wait (connection->io_path_cond,
1116  connection->io_path_mutex);
1117  }
1118  }
1119  }
1120 
1121  if (!connection->io_path_acquired)
1122  {
1123  we_acquired = TRUE;
1124  connection->io_path_acquired = TRUE;
1125  }
1126 
1127  _dbus_verbose ("end connection->io_path_acquired = %d we_acquired = %d\n",
1128  connection->io_path_acquired, we_acquired);
1129 
1130  _dbus_verbose ("unlocking io_path_mutex\n");
1131  _dbus_cmutex_unlock (connection->io_path_mutex);
1132 
1133  CONNECTION_LOCK (connection);
1134 
1135  HAVE_LOCK_CHECK (connection);
1136 
1137  _dbus_connection_unref_unlocked (connection);
1138 
1139  return we_acquired;
1140 }
1141 
1149 static void
1150 _dbus_connection_release_io_path (DBusConnection *connection)
1151 {
1152  HAVE_LOCK_CHECK (connection);
1153 
1154  _dbus_verbose ("locking io_path_mutex\n");
1155  _dbus_cmutex_lock (connection->io_path_mutex);
1156 
1157  _dbus_assert (connection->io_path_acquired);
1158 
1159  _dbus_verbose ("start connection->io_path_acquired = %d\n",
1160  connection->io_path_acquired);
1161 
1162  connection->io_path_acquired = FALSE;
1163  _dbus_condvar_wake_one (connection->io_path_cond);
1164 
1165  _dbus_verbose ("unlocking io_path_mutex\n");
1166  _dbus_cmutex_unlock (connection->io_path_mutex);
1167 }
1168 
1204 void
1206  DBusPendingCall *pending,
1207  unsigned int flags,
1208  int timeout_milliseconds)
1209 {
1210  _dbus_verbose ("start\n");
1211 
1212  HAVE_LOCK_CHECK (connection);
1213 
1214  if (connection->n_outgoing == 0)
1215  flags &= ~DBUS_ITERATION_DO_WRITING;
1216 
1217  if (_dbus_connection_acquire_io_path (connection,
1218  (flags & DBUS_ITERATION_BLOCK) ? timeout_milliseconds : 0))
1219  {
1220  HAVE_LOCK_CHECK (connection);
1221 
1222  if ( (pending != NULL) && _dbus_pending_call_get_completed_unlocked(pending))
1223  {
1224  _dbus_verbose ("pending call completed while acquiring I/O path");
1225  }
1226  else if ( (pending != NULL) &&
1227  _dbus_connection_peek_for_reply_unlocked (connection,
1229  {
1230  _dbus_verbose ("pending call completed while acquiring I/O path (reply found in queue)");
1231  }
1232  else
1233  {
1235  flags, timeout_milliseconds);
1236  }
1237 
1238  _dbus_connection_release_io_path (connection);
1239  }
1240 
1241  HAVE_LOCK_CHECK (connection);
1242 
1243  _dbus_verbose ("end\n");
1244 }
1245 
1257 {
1258  DBusConnection *connection;
1259  DBusWatchList *watch_list;
1260  DBusTimeoutList *timeout_list;
1261  DBusHashTable *pending_replies;
1262  DBusList *disconnect_link;
1263  DBusMessage *disconnect_message;
1264  DBusCounter *outgoing_counter;
1265  DBusObjectTree *objects;
1266 
1267  watch_list = NULL;
1268  connection = NULL;
1269  pending_replies = NULL;
1270  timeout_list = NULL;
1271  disconnect_link = NULL;
1272  disconnect_message = NULL;
1273  outgoing_counter = NULL;
1274  objects = NULL;
1275 
1276  watch_list = _dbus_watch_list_new ();
1277  if (watch_list == NULL)
1278  goto error;
1279 
1280  timeout_list = _dbus_timeout_list_new ();
1281  if (timeout_list == NULL)
1282  goto error;
1283 
1284  pending_replies =
1286  NULL,
1287  (DBusFreeFunction)free_pending_call_on_hash_removal);
1288  if (pending_replies == NULL)
1289  goto error;
1290 
1291  connection = dbus_new0 (DBusConnection, 1);
1292  if (connection == NULL)
1293  goto error;
1294 
1295  _dbus_rmutex_new_at_location (&connection->mutex);
1296  if (connection->mutex == NULL)
1297  goto error;
1298 
1300  if (connection->io_path_mutex == NULL)
1301  goto error;
1302 
1304  if (connection->dispatch_mutex == NULL)
1305  goto error;
1306 
1308  if (connection->dispatch_cond == NULL)
1309  goto error;
1310 
1312  if (connection->io_path_cond == NULL)
1313  goto error;
1314 
1316  if (connection->slot_mutex == NULL)
1317  goto error;
1318 
1319  disconnect_message = dbus_message_new_signal (DBUS_PATH_LOCAL,
1321  "Disconnected");
1322 
1323  if (disconnect_message == NULL)
1324  goto error;
1325 
1326  disconnect_link = _dbus_list_alloc_link (disconnect_message);
1327  if (disconnect_link == NULL)
1328  goto error;
1329 
1330  outgoing_counter = _dbus_counter_new ();
1331  if (outgoing_counter == NULL)
1332  goto error;
1333 
1334  objects = _dbus_object_tree_new (connection);
1335  if (objects == NULL)
1336  goto error;
1337 
1338  if (_dbus_modify_sigpipe)
1340 
1341  /* initialized to 0: use atomic op to avoid mixing atomic and non-atomic */
1342  _dbus_atomic_inc (&connection->refcount);
1343  connection->transport = transport;
1344  connection->watches = watch_list;
1345  connection->timeouts = timeout_list;
1346  connection->pending_replies = pending_replies;
1347  connection->outgoing_counter = outgoing_counter;
1348  connection->filter_list = NULL;
1349  connection->last_dispatch_status = DBUS_DISPATCH_COMPLETE; /* so we're notified first time there's data */
1350  connection->objects = objects;
1351  connection->exit_on_disconnect = FALSE;
1352  connection->shareable = FALSE;
1353  connection->route_peer_messages = FALSE;
1354  connection->disconnected_message_arrived = FALSE;
1355  connection->disconnected_message_processed = FALSE;
1356 
1357 #ifndef DBUS_DISABLE_CHECKS
1358  connection->generation = _dbus_current_generation;
1359 #endif
1360 
1361  _dbus_data_slot_list_init (&connection->slot_list);
1362 
1363  connection->client_serial = 1;
1364 
1365  connection->disconnect_message_link = disconnect_link;
1366 
1367  CONNECTION_LOCK (connection);
1368 
1369  if (!_dbus_transport_set_connection (transport, connection))
1370  {
1371  CONNECTION_UNLOCK (connection);
1372 
1373  goto error;
1374  }
1375 
1376  _dbus_transport_ref (transport);
1377 
1378  CONNECTION_UNLOCK (connection);
1379 
1380  _dbus_connection_trace_ref (connection, 0, 1, "new_for_transport");
1381  return connection;
1382 
1383  error:
1384  if (disconnect_message != NULL)
1385  dbus_message_unref (disconnect_message);
1386 
1387  if (disconnect_link != NULL)
1388  _dbus_list_free_link (disconnect_link);
1389 
1390  if (connection != NULL)
1391  {
1394  _dbus_rmutex_free_at_location (&connection->mutex);
1398  dbus_free (connection);
1399  }
1400  if (pending_replies)
1401  _dbus_hash_table_unref (pending_replies);
1402 
1403  if (watch_list)
1404  _dbus_watch_list_free (watch_list);
1405 
1406  if (timeout_list)
1407  _dbus_timeout_list_free (timeout_list);
1408 
1409  if (outgoing_counter)
1410  _dbus_counter_unref (outgoing_counter);
1411 
1412  if (objects)
1413  _dbus_object_tree_unref (objects);
1414 
1415  return NULL;
1416 }
1417 
1427 {
1428  dbus_int32_t old_refcount;
1429 
1430  _dbus_assert (connection != NULL);
1432 
1433  HAVE_LOCK_CHECK (connection);
1434 
1435  old_refcount = _dbus_atomic_inc (&connection->refcount);
1436  _dbus_connection_trace_ref (connection, old_refcount, old_refcount + 1,
1437  "ref_unlocked");
1438 
1439  return connection;
1440 }
1441 
1448 void
1450 {
1451  dbus_int32_t old_refcount;
1452 
1453  HAVE_LOCK_CHECK (connection);
1454 
1455  _dbus_assert (connection != NULL);
1456 
1457  old_refcount = _dbus_atomic_dec (&connection->refcount);
1458 
1459  _dbus_connection_trace_ref (connection, old_refcount, old_refcount - 1,
1460  "unref_unlocked");
1461 
1462  if (old_refcount == 1)
1463  _dbus_connection_last_unref (connection);
1464 }
1465 
1466 static dbus_uint32_t
1467 _dbus_connection_get_next_client_serial (DBusConnection *connection)
1468 {
1469  dbus_uint32_t serial;
1470 
1471  serial = connection->client_serial++;
1472 
1473  if (connection->client_serial == 0)
1474  connection->client_serial = 1;
1475 
1476  return serial;
1477 }
1478 
1494  unsigned int condition,
1495  void *data)
1496 {
1497  DBusConnection *connection;
1498  dbus_bool_t retval;
1499  DBusDispatchStatus status;
1500 
1501  connection = data;
1502 
1503  _dbus_verbose ("start\n");
1504 
1505  CONNECTION_LOCK (connection);
1506 
1507  if (!_dbus_connection_acquire_io_path (connection, 1))
1508  {
1509  /* another thread is handling the message */
1510  CONNECTION_UNLOCK (connection);
1511  return TRUE;
1512  }
1513 
1514  HAVE_LOCK_CHECK (connection);
1515  retval = _dbus_transport_handle_watch (connection->transport,
1516  watch, condition);
1517 
1518  _dbus_connection_release_io_path (connection);
1519 
1520  HAVE_LOCK_CHECK (connection);
1521 
1522  _dbus_verbose ("middle\n");
1523 
1524  status = _dbus_connection_get_dispatch_status_unlocked (connection);
1525 
1526  /* this calls out to user code */
1527  _dbus_connection_update_dispatch_status_and_unlock (connection, status);
1528 
1529  _dbus_verbose ("end\n");
1530 
1531  return retval;
1532 }
1533 
1534 _DBUS_DEFINE_GLOBAL_LOCK (shared_connections);
1535 static DBusHashTable *shared_connections = NULL;
1536 static DBusList *shared_connections_no_guid = NULL;
1537 
1538 static void
1539 close_connection_on_shutdown (DBusConnection *connection)
1540 {
1541  DBusMessage *message;
1542 
1543  dbus_connection_ref (connection);
1545 
1546  /* Churn through to the Disconnected message */
1547  while ((message = dbus_connection_pop_message (connection)))
1548  {
1549  dbus_message_unref (message);
1550  }
1551  dbus_connection_unref (connection);
1552 }
1553 
1554 static void
1555 shared_connections_shutdown (void *data)
1556 {
1557  int n_entries;
1558 
1559  _DBUS_LOCK (shared_connections);
1560 
1561  /* This is a little bit unpleasant... better ideas? */
1562  while ((n_entries = _dbus_hash_table_get_n_entries (shared_connections)) > 0)
1563  {
1564  DBusConnection *connection;
1565  DBusHashIter iter;
1566 
1567  _dbus_hash_iter_init (shared_connections, &iter);
1568  _dbus_hash_iter_next (&iter);
1569 
1570  connection = _dbus_hash_iter_get_value (&iter);
1571 
1572  _DBUS_UNLOCK (shared_connections);
1573  close_connection_on_shutdown (connection);
1574  _DBUS_LOCK (shared_connections);
1575 
1576  /* The connection should now be dead and not in our hash ... */
1577  _dbus_assert (_dbus_hash_table_get_n_entries (shared_connections) < n_entries);
1578  }
1579 
1580  _dbus_assert (_dbus_hash_table_get_n_entries (shared_connections) == 0);
1581 
1582  _dbus_hash_table_unref (shared_connections);
1583  shared_connections = NULL;
1584 
1585  if (shared_connections_no_guid != NULL)
1586  {
1587  DBusConnection *connection;
1588  connection = _dbus_list_pop_first (&shared_connections_no_guid);
1589  while (connection != NULL)
1590  {
1591  _DBUS_UNLOCK (shared_connections);
1592  close_connection_on_shutdown (connection);
1593  _DBUS_LOCK (shared_connections);
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 
1603 static dbus_bool_t
1604 connection_lookup_shared (DBusAddressEntry *entry,
1605  DBusConnection **result)
1606 {
1607  _dbus_verbose ("checking for existing connection\n");
1608 
1609  *result = NULL;
1610 
1611  _DBUS_LOCK (shared_connections);
1612 
1613  if (shared_connections == NULL)
1614  {
1615  _dbus_verbose ("creating shared_connections hash table\n");
1616 
1617  shared_connections = _dbus_hash_table_new (DBUS_HASH_STRING,
1618  dbus_free,
1619  NULL);
1620  if (shared_connections == NULL)
1621  {
1622  _DBUS_UNLOCK (shared_connections);
1623  return FALSE;
1624  }
1625 
1626  if (!_dbus_register_shutdown_func (shared_connections_shutdown, NULL))
1627  {
1628  _dbus_hash_table_unref (shared_connections);
1629  shared_connections = NULL;
1630  _DBUS_UNLOCK (shared_connections);
1631  return FALSE;
1632  }
1633 
1634  _dbus_verbose (" successfully created shared_connections\n");
1635 
1636  _DBUS_UNLOCK (shared_connections);
1637  return TRUE; /* no point looking up in the hash we just made */
1638  }
1639  else
1640  {
1641  const char *guid;
1642 
1643  guid = dbus_address_entry_get_value (entry, "guid");
1644 
1645  if (guid != NULL)
1646  {
1647  DBusConnection *connection;
1648 
1649  connection = _dbus_hash_table_lookup_string (shared_connections,
1650  guid);
1651 
1652  if (connection)
1653  {
1654  /* The DBusConnection can't be finalized without taking
1655  * the shared_connections lock to remove it from the
1656  * hash. So it's safe to ref the connection here.
1657  * However, it may be disconnected if the Disconnected
1658  * message hasn't been processed yet, in which case we
1659  * want to pretend it isn't in the hash and avoid
1660  * returning it.
1661  *
1662  * The idea is to avoid ever returning a disconnected connection
1663  * from dbus_connection_open(). We could just synchronously
1664  * drop our shared ref to the connection on connection disconnect,
1665  * and then assert here that the connection is connected, but
1666  * that causes reentrancy headaches.
1667  */
1668  CONNECTION_LOCK (connection);
1669  if (_dbus_connection_get_is_connected_unlocked (connection))
1670  {
1671  _dbus_connection_ref_unlocked (connection);
1672  *result = connection;
1673  _dbus_verbose ("looked up existing connection to server guid %s\n",
1674  guid);
1675  }
1676  else
1677  {
1678  _dbus_verbose ("looked up existing connection to server guid %s but it was disconnected so ignoring it\n",
1679  guid);
1680  }
1681  CONNECTION_UNLOCK (connection);
1682  }
1683  }
1684 
1685  _DBUS_UNLOCK (shared_connections);
1686  return TRUE;
1687  }
1688 }
1689 
1690 static dbus_bool_t
1691 connection_record_shared_unlocked (DBusConnection *connection,
1692  const char *guid)
1693 {
1694  char *guid_key;
1695  char *guid_in_connection;
1696 
1697  HAVE_LOCK_CHECK (connection);
1698  _dbus_assert (connection->server_guid == NULL);
1699  _dbus_assert (connection->shareable);
1700 
1701  /* get a hard ref on this connection, even if
1702  * we won't in fact store it in the hash, we still
1703  * need to hold a ref on it until it's disconnected.
1704  */
1705  _dbus_connection_ref_unlocked (connection);
1706 
1707  if (guid == NULL)
1708  {
1709  _DBUS_LOCK (shared_connections);
1710 
1711  if (!_dbus_list_prepend (&shared_connections_no_guid, connection))
1712  {
1713  _DBUS_UNLOCK (shared_connections);
1714  return FALSE;
1715  }
1716 
1717  _DBUS_UNLOCK (shared_connections);
1718  return TRUE; /* don't store in the hash */
1719  }
1720 
1721  /* A separate copy of the key is required in the hash table, because
1722  * we don't have a lock on the connection when we are doing a hash
1723  * lookup.
1724  */
1725 
1726  guid_key = _dbus_strdup (guid);
1727  if (guid_key == NULL)
1728  return FALSE;
1729 
1730  guid_in_connection = _dbus_strdup (guid);
1731  if (guid_in_connection == NULL)
1732  {
1733  dbus_free (guid_key);
1734  return FALSE;
1735  }
1736 
1737  _DBUS_LOCK (shared_connections);
1738  _dbus_assert (shared_connections != NULL);
1739 
1740  if (!_dbus_hash_table_insert_string (shared_connections,
1741  guid_key, connection))
1742  {
1743  dbus_free (guid_key);
1744  dbus_free (guid_in_connection);
1745  _DBUS_UNLOCK (shared_connections);
1746  return FALSE;
1747  }
1748 
1749  connection->server_guid = guid_in_connection;
1750 
1751  _dbus_verbose ("stored connection to %s to be shared\n",
1752  connection->server_guid);
1753 
1754  _DBUS_UNLOCK (shared_connections);
1755 
1756  _dbus_assert (connection->server_guid != NULL);
1757 
1758  return TRUE;
1759 }
1760 
1761 static void
1762 connection_forget_shared_unlocked (DBusConnection *connection)
1763 {
1764  HAVE_LOCK_CHECK (connection);
1765 
1766  if (!connection->shareable)
1767  return;
1768 
1769  _DBUS_LOCK (shared_connections);
1770 
1771  if (connection->server_guid != NULL)
1772  {
1773  _dbus_verbose ("dropping connection to %s out of the shared table\n",
1774  connection->server_guid);
1775 
1776  if (!_dbus_hash_table_remove_string (shared_connections,
1777  connection->server_guid))
1778  _dbus_assert_not_reached ("connection was not in the shared table");
1779 
1780  dbus_free (connection->server_guid);
1781  connection->server_guid = NULL;
1782  }
1783  else
1784  {
1785  _dbus_list_remove (&shared_connections_no_guid, connection);
1786  }
1787 
1788  _DBUS_UNLOCK (shared_connections);
1789 
1790  /* remove our reference held on all shareable connections */
1791  _dbus_connection_unref_unlocked (connection);
1792 }
1793 
1794 static DBusConnection*
1795 connection_try_from_address_entry (DBusAddressEntry *entry,
1796  DBusError *error)
1797 {
1798  DBusTransport *transport;
1799  DBusConnection *connection;
1800 
1801  transport = _dbus_transport_open (entry, error);
1802 
1803  if (transport == NULL)
1804  {
1805  _DBUS_ASSERT_ERROR_IS_SET (error);
1806  return NULL;
1807  }
1808 
1809  connection = _dbus_connection_new_for_transport (transport);
1810 
1811  _dbus_transport_unref (transport);
1812 
1813  if (connection == NULL)
1814  {
1815  _DBUS_SET_OOM (error);
1816  return NULL;
1817  }
1818 
1819 #ifndef DBUS_DISABLE_CHECKS
1820  _dbus_assert (!connection->have_connection_lock);
1821 #endif
1822  return connection;
1823 }
1824 
1825 /*
1826  * If the shared parameter is true, then any existing connection will
1827  * be used (and if a new connection is created, it will be available
1828  * for use by others). If the shared parameter is false, a new
1829  * connection will always be created, and the new connection will
1830  * never be returned to other callers.
1831  *
1832  * @param address the address
1833  * @param shared whether the connection is shared or private
1834  * @param error error return
1835  * @returns the connection or #NULL on error
1836  */
1837 static DBusConnection*
1838 _dbus_connection_open_internal (const char *address,
1839  dbus_bool_t shared,
1840  DBusError *error)
1841 {
1842  DBusConnection *connection;
1843  DBusAddressEntry **entries;
1844  DBusError tmp_error = DBUS_ERROR_INIT;
1845  DBusError first_error = DBUS_ERROR_INIT;
1846  int len, i;
1847 
1848  _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1849 
1850  _dbus_verbose ("opening %s connection to: %s\n",
1851  shared ? "shared" : "private", address);
1852 
1853  if (!dbus_parse_address (address, &entries, &len, error))
1854  return NULL;
1855 
1856  _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1857 
1858  connection = NULL;
1859 
1860  for (i = 0; i < len; i++)
1861  {
1862  if (shared)
1863  {
1864  if (!connection_lookup_shared (entries[i], &connection))
1865  _DBUS_SET_OOM (&tmp_error);
1866  }
1867 
1868  if (connection == NULL)
1869  {
1870  connection = connection_try_from_address_entry (entries[i],
1871  &tmp_error);
1872 
1873  if (connection != NULL && shared)
1874  {
1875  const char *guid;
1876 
1877  connection->shareable = TRUE;
1878 
1879  /* guid may be NULL */
1880  guid = dbus_address_entry_get_value (entries[i], "guid");
1881 
1882  CONNECTION_LOCK (connection);
1883 
1884  if (!connection_record_shared_unlocked (connection, guid))
1885  {
1886  _DBUS_SET_OOM (&tmp_error);
1887  _dbus_connection_close_possibly_shared_and_unlock (connection);
1888  dbus_connection_unref (connection);
1889  connection = NULL;
1890  }
1891  else
1892  CONNECTION_UNLOCK (connection);
1893  }
1894  }
1895 
1896  if (connection)
1897  break;
1898 
1899  _DBUS_ASSERT_ERROR_IS_SET (&tmp_error);
1900 
1901  if (i == 0)
1902  dbus_move_error (&tmp_error, &first_error);
1903  else
1904  dbus_error_free (&tmp_error);
1905  }
1906 
1907  _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1908  _DBUS_ASSERT_ERROR_IS_CLEAR (&tmp_error);
1909 
1910  if (connection == NULL)
1911  {
1912  _DBUS_ASSERT_ERROR_IS_SET (&first_error);
1913  dbus_move_error (&first_error, error);
1914  }
1915  else
1916  dbus_error_free (&first_error);
1917 
1918  dbus_address_entries_free (entries);
1919  return connection;
1920 }
1921 
1930 void
1932 {
1933  _dbus_assert (connection != NULL);
1935 
1936  CONNECTION_LOCK (connection);
1937  _dbus_connection_close_possibly_shared_and_unlock (connection);
1938 }
1939 
1940 static DBusPreallocatedSend*
1941 _dbus_connection_preallocate_send_unlocked (DBusConnection *connection)
1942 {
1943  DBusPreallocatedSend *preallocated;
1944 
1945  HAVE_LOCK_CHECK (connection);
1946 
1947  _dbus_assert (connection != NULL);
1948 
1949  preallocated = dbus_new (DBusPreallocatedSend, 1);
1950  if (preallocated == NULL)
1951  return NULL;
1952 
1953  preallocated->queue_link = _dbus_list_alloc_link (NULL);
1954  if (preallocated->queue_link == NULL)
1955  goto failed_0;
1956 
1957  preallocated->counter_link = _dbus_list_alloc_link (connection->outgoing_counter);
1958  if (preallocated->counter_link == NULL)
1959  goto failed_1;
1960 
1961  _dbus_counter_ref (preallocated->counter_link->data);
1962 
1963  preallocated->connection = connection;
1964 
1965  return preallocated;
1966 
1967  failed_1:
1968  _dbus_list_free_link (preallocated->queue_link);
1969  failed_0:
1970  dbus_free (preallocated);
1971 
1972  return NULL;
1973 }
1974 
1975 /* Called with lock held, does not update dispatch status */
1976 static void
1977 _dbus_connection_send_preallocated_unlocked_no_update (DBusConnection *connection,
1978  DBusPreallocatedSend *preallocated,
1979  DBusMessage *message,
1980  dbus_uint32_t *client_serial)
1981 {
1982  dbus_uint32_t serial;
1983 
1984  preallocated->queue_link->data = message;
1986  preallocated->queue_link);
1987 
1988  /* It's OK that we'll never call the notify function, because for the
1989  * outgoing limit, there isn't one */
1991  preallocated->counter_link);
1992 
1993  dbus_free (preallocated);
1994  preallocated = NULL;
1995 
1996  dbus_message_ref (message);
1997 
1998  connection->n_outgoing += 1;
1999 
2000  _dbus_verbose ("Message %p (%s %s %s %s '%s') for %s added to outgoing queue %p, %d pending to send\n",
2001  message,
2003  dbus_message_get_path (message) ?
2004  dbus_message_get_path (message) :
2005  "no path",
2006  dbus_message_get_interface (message) ?
2007  dbus_message_get_interface (message) :
2008  "no interface",
2009  dbus_message_get_member (message) ?
2010  dbus_message_get_member (message) :
2011  "no member",
2012  dbus_message_get_signature (message),
2013  dbus_message_get_destination (message) ?
2014  dbus_message_get_destination (message) :
2015  "null",
2016  connection,
2017  connection->n_outgoing);
2018 
2019  if (dbus_message_get_serial (message) == 0)
2020  {
2021  serial = _dbus_connection_get_next_client_serial (connection);
2022  dbus_message_set_serial (message, serial);
2023  if (client_serial)
2024  *client_serial = serial;
2025  }
2026  else
2027  {
2028  if (client_serial)
2029  *client_serial = dbus_message_get_serial (message);
2030  }
2031 
2032  _dbus_verbose ("Message %p serial is %u\n",
2033  message, dbus_message_get_serial (message));
2034 
2035  dbus_message_lock (message);
2036 
2037  /* Now we need to run an iteration to hopefully just write the messages
2038  * out immediately, and otherwise get them queued up
2039  */
2041  NULL,
2042  DBUS_ITERATION_DO_WRITING,
2043  -1);
2044 
2045  /* If stuff is still queued up, be sure we wake up the main loop */
2046  if (connection->n_outgoing > 0)
2047  _dbus_connection_wakeup_mainloop (connection);
2048 }
2049 
2050 static void
2051 _dbus_connection_send_preallocated_and_unlock (DBusConnection *connection,
2052  DBusPreallocatedSend *preallocated,
2053  DBusMessage *message,
2054  dbus_uint32_t *client_serial)
2055 {
2056  DBusDispatchStatus status;
2057 
2058  HAVE_LOCK_CHECK (connection);
2059 
2060  _dbus_connection_send_preallocated_unlocked_no_update (connection,
2061  preallocated,
2062  message, client_serial);
2063 
2064  _dbus_verbose ("middle\n");
2065  status = _dbus_connection_get_dispatch_status_unlocked (connection);
2066 
2067  /* this calls out to user code */
2068  _dbus_connection_update_dispatch_status_and_unlock (connection, status);
2069 }
2070 
2082  DBusMessage *message,
2083  dbus_uint32_t *client_serial)
2084 {
2085  DBusPreallocatedSend *preallocated;
2086 
2087  _dbus_assert (connection != NULL);
2088  _dbus_assert (message != NULL);
2089 
2090  preallocated = _dbus_connection_preallocate_send_unlocked (connection);
2091  if (preallocated == NULL)
2092  {
2093  CONNECTION_UNLOCK (connection);
2094  return FALSE;
2095  }
2096 
2097  _dbus_connection_send_preallocated_and_unlock (connection,
2098  preallocated,
2099  message,
2100  client_serial);
2101  return TRUE;
2102 }
2103 
2128 void
2130 {
2131  dbus_int32_t refcount;
2132 
2133  CONNECTION_LOCK (connection);
2134 
2135  refcount = _dbus_atomic_get (&connection->refcount);
2136  /* The caller should have at least one ref */
2137  _dbus_assert (refcount >= 1);
2138 
2139  if (refcount == 1)
2140  _dbus_connection_close_possibly_shared_and_unlock (connection);
2141  else
2142  CONNECTION_UNLOCK (connection);
2143 }
2144 
2145 
2155 static void
2156 _dbus_memory_pause_based_on_timeout (int timeout_milliseconds)
2157 {
2158  if (timeout_milliseconds == -1)
2159  _dbus_sleep_milliseconds (1000);
2160  else if (timeout_milliseconds < 100)
2161  ; /* just busy loop */
2162  else if (timeout_milliseconds <= 1000)
2163  _dbus_sleep_milliseconds (timeout_milliseconds / 3);
2164  else
2165  _dbus_sleep_milliseconds (1000);
2166 }
2167 
2168 static DBusMessage *
2169 generate_local_error_message (dbus_uint32_t serial,
2170  char *error_name,
2171  char *error_msg)
2172 {
2173  DBusMessage *message;
2175  if (!message)
2176  goto out;
2177 
2178  if (!dbus_message_set_error_name (message, error_name))
2179  {
2180  dbus_message_unref (message);
2181  message = NULL;
2182  goto out;
2183  }
2184 
2185  dbus_message_set_no_reply (message, TRUE);
2186 
2187  if (!dbus_message_set_reply_serial (message,
2188  serial))
2189  {
2190  dbus_message_unref (message);
2191  message = NULL;
2192  goto out;
2193  }
2194 
2195  if (error_msg != NULL)
2196  {
2197  DBusMessageIter iter;
2198 
2199  dbus_message_iter_init_append (message, &iter);
2200  if (!dbus_message_iter_append_basic (&iter,
2202  &error_msg))
2203  {
2204  dbus_message_unref (message);
2205  message = NULL;
2206  goto out;
2207  }
2208  }
2209 
2210  out:
2211  return message;
2212 }
2213 
2214 /*
2215  * Peek the incoming queue to see if we got reply for a specific serial
2216  */
2217 static dbus_bool_t
2218 _dbus_connection_peek_for_reply_unlocked (DBusConnection *connection,
2219  dbus_uint32_t client_serial)
2220 {
2221  DBusList *link;
2222  HAVE_LOCK_CHECK (connection);
2223 
2224  link = _dbus_list_get_first_link (&connection->incoming_messages);
2225 
2226  while (link != NULL)
2227  {
2228  DBusMessage *reply = link->data;
2229 
2230  if (dbus_message_get_reply_serial (reply) == client_serial)
2231  {
2232  _dbus_verbose ("%s reply to %d found in queue\n", _DBUS_FUNCTION_NAME, client_serial);
2233  return TRUE;
2234  }
2235  link = _dbus_list_get_next_link (&connection->incoming_messages, link);
2236  }
2237 
2238  return FALSE;
2239 }
2240 
2241 /* This is slightly strange since we can pop a message here without
2242  * the dispatch lock.
2243  */
2244 static DBusMessage*
2245 check_for_reply_unlocked (DBusConnection *connection,
2246  dbus_uint32_t client_serial)
2247 {
2248  DBusList *link;
2249 
2250  HAVE_LOCK_CHECK (connection);
2251 
2252  link = _dbus_list_get_first_link (&connection->incoming_messages);
2253 
2254  while (link != NULL)
2255  {
2256  DBusMessage *reply = link->data;
2257 
2258  if (dbus_message_get_reply_serial (reply) == client_serial)
2259  {
2260  _dbus_list_remove_link (&connection->incoming_messages, link);
2261  connection->n_incoming -= 1;
2262  return reply;
2263  }
2264  link = _dbus_list_get_next_link (&connection->incoming_messages, link);
2265  }
2266 
2267  return NULL;
2268 }
2269 
2270 static void
2271 connection_timeout_and_complete_all_pending_calls_unlocked (DBusConnection *connection)
2272 {
2273  /* We can't iterate over the hash in the normal way since we'll be
2274  * dropping the lock for each item. So we restart the
2275  * iter each time as we drain the hash table.
2276  */
2277 
2278  while (_dbus_hash_table_get_n_entries (connection->pending_replies) > 0)
2279  {
2280  DBusPendingCall *pending;
2281  DBusHashIter iter;
2282 
2283  _dbus_hash_iter_init (connection->pending_replies, &iter);
2284  _dbus_hash_iter_next (&iter);
2285 
2286  pending = _dbus_hash_iter_get_value (&iter);
2288 
2290  connection);
2291 
2297 
2299  CONNECTION_LOCK (connection);
2300  }
2301  HAVE_LOCK_CHECK (connection);
2302 }
2303 
2304 static void
2305 complete_pending_call_and_unlock (DBusConnection *connection,
2306  DBusPendingCall *pending,
2307  DBusMessage *message)
2308 {
2309  _dbus_pending_call_set_reply_unlocked (pending, message);
2310  _dbus_pending_call_ref_unlocked (pending); /* in case there's no app with a ref held */
2311  _dbus_connection_detach_pending_call_and_unlock (connection, pending);
2312 
2313  /* Must be called unlocked since it invokes app callback */
2314  _dbus_pending_call_complete (pending);
2315  dbus_pending_call_unref (pending);
2316 }
2317 
2318 static dbus_bool_t
2319 check_for_reply_and_update_dispatch_unlocked (DBusConnection *connection,
2320  DBusPendingCall *pending)
2321 {
2322  DBusMessage *reply;
2323  DBusDispatchStatus status;
2324 
2325  reply = check_for_reply_unlocked (connection,
2327  if (reply != NULL)
2328  {
2329  _dbus_verbose ("checked for reply\n");
2330 
2331  _dbus_verbose ("dbus_connection_send_with_reply_and_block(): got reply\n");
2332 
2333  complete_pending_call_and_unlock (connection, pending, reply);
2334  dbus_message_unref (reply);
2335 
2336  CONNECTION_LOCK (connection);
2337  status = _dbus_connection_get_dispatch_status_unlocked (connection);
2338  _dbus_connection_update_dispatch_status_and_unlock (connection, status);
2339  dbus_pending_call_unref (pending);
2340 
2341  return TRUE;
2342  }
2343 
2344  return FALSE;
2345 }
2346 
2361 void
2363 {
2364  long start_tv_sec, start_tv_usec;
2365  long tv_sec, tv_usec;
2366  DBusDispatchStatus status;
2367  DBusConnection *connection;
2368  dbus_uint32_t client_serial;
2369  DBusTimeout *timeout;
2370  int timeout_milliseconds, elapsed_milliseconds;
2371 
2372  _dbus_assert (pending != NULL);
2373 
2374  if (dbus_pending_call_get_completed (pending))
2375  return;
2376 
2377  dbus_pending_call_ref (pending); /* necessary because the call could be canceled */
2378 
2379  connection = _dbus_pending_call_get_connection_and_lock (pending);
2380 
2381  /* Flush message queue - note, can affect dispatch status */
2382  _dbus_connection_flush_unlocked (connection);
2383 
2384  client_serial = _dbus_pending_call_get_reply_serial_unlocked (pending);
2385 
2386  /* note that timeout_milliseconds is limited to a smallish value
2387  * in _dbus_pending_call_new() so overflows aren't possible
2388  * below
2389  */
2390  timeout = _dbus_pending_call_get_timeout_unlocked (pending);
2391  _dbus_get_monotonic_time (&start_tv_sec, &start_tv_usec);
2392  if (timeout)
2393  {
2394  timeout_milliseconds = dbus_timeout_get_interval (timeout);
2395 
2396  _dbus_verbose ("dbus_connection_send_with_reply_and_block(): will block %d milliseconds for reply serial %u from %ld sec %ld usec\n",
2397  timeout_milliseconds,
2398  client_serial,
2399  start_tv_sec, start_tv_usec);
2400  }
2401  else
2402  {
2403  timeout_milliseconds = -1;
2404 
2405  _dbus_verbose ("dbus_connection_send_with_reply_and_block(): will block for reply serial %u\n", client_serial);
2406  }
2407 
2408  /* check to see if we already got the data off the socket */
2409  /* from another blocked pending call */
2410  if (check_for_reply_and_update_dispatch_unlocked (connection, pending))
2411  return;
2412 
2413  /* Now we wait... */
2414  /* always block at least once as we know we don't have the reply yet */
2416  pending,
2417  DBUS_ITERATION_DO_READING |
2418  DBUS_ITERATION_BLOCK,
2419  timeout_milliseconds);
2420 
2421  recheck_status:
2422 
2423  _dbus_verbose ("top of recheck\n");
2424 
2425  HAVE_LOCK_CHECK (connection);
2426 
2427  /* queue messages and get status */
2428 
2429  status = _dbus_connection_get_dispatch_status_unlocked (connection);
2430 
2431  /* the get_completed() is in case a dispatch() while we were blocking
2432  * got the reply instead of us.
2433  */
2435  {
2436  _dbus_verbose ("Pending call completed by dispatch\n");
2437  _dbus_connection_update_dispatch_status_and_unlock (connection, status);
2438  dbus_pending_call_unref (pending);
2439  return;
2440  }
2441 
2442  if (status == DBUS_DISPATCH_DATA_REMAINS)
2443  {
2444  if (check_for_reply_and_update_dispatch_unlocked (connection, pending))
2445  return;
2446  }
2447 
2448  _dbus_get_monotonic_time (&tv_sec, &tv_usec);
2449  elapsed_milliseconds = (tv_sec - start_tv_sec) * 1000 +
2450  (tv_usec - start_tv_usec) / 1000;
2451 
2452  if (!_dbus_connection_get_is_connected_unlocked (connection))
2453  {
2454  DBusMessage *error_msg;
2455 
2456  error_msg = generate_local_error_message (client_serial,
2458  "Connection was disconnected before a reply was received");
2459 
2460  /* on OOM error_msg is set to NULL */
2461  complete_pending_call_and_unlock (connection, pending, error_msg);
2462  dbus_pending_call_unref (pending);
2463  return;
2464  }
2465  else if (connection->disconnect_message_link == NULL)
2466  _dbus_verbose ("dbus_connection_send_with_reply_and_block(): disconnected\n");
2467  else if (timeout == NULL)
2468  {
2469  if (status == DBUS_DISPATCH_NEED_MEMORY)
2470  {
2471  /* Try sleeping a bit, as we aren't sure we need to block for reading,
2472  * we may already have a reply in the buffer and just can't process
2473  * it.
2474  */
2475  _dbus_verbose ("dbus_connection_send_with_reply_and_block() waiting for more memory\n");
2476 
2477  _dbus_memory_pause_based_on_timeout (timeout_milliseconds - elapsed_milliseconds);
2478  }
2479  else
2480  {
2481  /* block again, we don't have the reply buffered yet. */
2483  pending,
2484  DBUS_ITERATION_DO_READING |
2485  DBUS_ITERATION_BLOCK,
2486  timeout_milliseconds - elapsed_milliseconds);
2487  }
2488 
2489  goto recheck_status;
2490  }
2491  else if (tv_sec < start_tv_sec)
2492  _dbus_verbose ("dbus_connection_send_with_reply_and_block(): clock set backward\n");
2493  else if (elapsed_milliseconds < timeout_milliseconds)
2494  {
2495  _dbus_verbose ("dbus_connection_send_with_reply_and_block(): %d milliseconds remain\n", timeout_milliseconds - elapsed_milliseconds);
2496 
2497  if (status == DBUS_DISPATCH_NEED_MEMORY)
2498  {
2499  /* Try sleeping a bit, as we aren't sure we need to block for reading,
2500  * we may already have a reply in the buffer and just can't process
2501  * it.
2502  */
2503  _dbus_verbose ("dbus_connection_send_with_reply_and_block() waiting for more memory\n");
2504 
2505  _dbus_memory_pause_based_on_timeout (timeout_milliseconds - elapsed_milliseconds);
2506  }
2507  else
2508  {
2509  /* block again, we don't have the reply buffered yet. */
2511  NULL,
2512  DBUS_ITERATION_DO_READING |
2513  DBUS_ITERATION_BLOCK,
2514  timeout_milliseconds - elapsed_milliseconds);
2515  }
2516 
2517  goto recheck_status;
2518  }
2519 
2520  _dbus_verbose ("dbus_connection_send_with_reply_and_block(): Waited %d milliseconds and got no reply\n",
2521  elapsed_milliseconds);
2522 
2524 
2525  /* unlock and call user code */
2526  complete_pending_call_and_unlock (connection, pending, NULL);
2527 
2528  /* update user code on dispatch status */
2529  CONNECTION_LOCK (connection);
2530  status = _dbus_connection_get_dispatch_status_unlocked (connection);
2531  _dbus_connection_update_dispatch_status_and_unlock (connection, status);
2532  dbus_pending_call_unref (pending);
2533 }
2534 
2572 dbus_connection_open (const char *address,
2573  DBusError *error)
2574 {
2575  DBusConnection *connection;
2576 
2577  _dbus_return_val_if_fail (address != NULL, NULL);
2578  _dbus_return_val_if_error_is_set (error, NULL);
2579 
2580  connection = _dbus_connection_open_internal (address,
2581  TRUE,
2582  error);
2583 
2584  return connection;
2585 }
2586 
2615 dbus_connection_open_private (const char *address,
2616  DBusError *error)
2617 {
2618  DBusConnection *connection;
2619 
2620  _dbus_return_val_if_fail (address != NULL, NULL);
2621  _dbus_return_val_if_error_is_set (error, NULL);
2622 
2623  connection = _dbus_connection_open_internal (address,
2624  FALSE,
2625  error);
2626 
2627  return connection;
2628 }
2629 
2638 {
2639  dbus_int32_t old_refcount;
2640 
2641  _dbus_return_val_if_fail (connection != NULL, NULL);
2642  _dbus_return_val_if_fail (connection->generation == _dbus_current_generation, NULL);
2643  old_refcount = _dbus_atomic_inc (&connection->refcount);
2644  _dbus_connection_trace_ref (connection, old_refcount, old_refcount + 1,
2645  "ref");
2646 
2647  return connection;
2648 }
2649 
2650 static void
2651 free_outgoing_message (void *element,
2652  void *data)
2653 {
2654  DBusMessage *message = element;
2655  DBusConnection *connection = data;
2656 
2657  _dbus_message_remove_counter (message, connection->outgoing_counter);
2658  dbus_message_unref (message);
2659 }
2660 
2661 /* This is run without the mutex held, but after the last reference
2662  * to the connection has been dropped we should have no thread-related
2663  * problems
2664  */
2665 static void
2666 _dbus_connection_last_unref (DBusConnection *connection)
2667 {
2668  DBusList *link;
2669 
2670  _dbus_verbose ("Finalizing connection %p\n", connection);
2671 
2672  _dbus_assert (_dbus_atomic_get (&connection->refcount) == 0);
2673 
2674  /* You have to disconnect the connection before unref:ing it. Otherwise
2675  * you won't get the disconnected message.
2676  */
2678  _dbus_assert (connection->server_guid == NULL);
2679 
2680  /* ---- We're going to call various application callbacks here, hope it doesn't break anything... */
2682 
2686 
2687  _dbus_watch_list_free (connection->watches);
2688  connection->watches = NULL;
2689 
2690  _dbus_timeout_list_free (connection->timeouts);
2691  connection->timeouts = NULL;
2692 
2693  _dbus_data_slot_list_free (&connection->slot_list);
2694 
2695  link = _dbus_list_get_first_link (&connection->filter_list);
2696  while (link != NULL)
2697  {
2698  DBusMessageFilter *filter = link->data;
2699  DBusList *next = _dbus_list_get_next_link (&connection->filter_list, link);
2700 
2701  filter->function = NULL;
2702  _dbus_message_filter_unref (filter); /* calls app callback */
2703  link->data = NULL;
2704 
2705  link = next;
2706  }
2707  _dbus_list_clear (&connection->filter_list);
2708 
2709  /* ---- Done with stuff that invokes application callbacks */
2710 
2711  _dbus_object_tree_unref (connection->objects);
2712 
2714  connection->pending_replies = NULL;
2715 
2716  _dbus_list_clear (&connection->filter_list);
2717 
2718  _dbus_list_foreach (&connection->outgoing_messages,
2719  free_outgoing_message,
2720  connection);
2721  _dbus_list_clear (&connection->outgoing_messages);
2722 
2723  _dbus_list_foreach (&connection->incoming_messages,
2725  NULL);
2726  _dbus_list_clear (&connection->incoming_messages);
2727 
2728  _dbus_counter_unref (connection->outgoing_counter);
2729 
2730  _dbus_transport_unref (connection->transport);
2731 
2732  if (connection->disconnect_message_link)
2733  {
2734  DBusMessage *message = connection->disconnect_message_link->data;
2735  dbus_message_unref (message);
2737  }
2738 
2741 
2744 
2746 
2747  _dbus_rmutex_free_at_location (&connection->mutex);
2748 
2749  dbus_free (connection);
2750 }
2751 
2771 void
2773 {
2774  dbus_int32_t old_refcount;
2775 
2776  _dbus_return_if_fail (connection != NULL);
2777  _dbus_return_if_fail (connection->generation == _dbus_current_generation);
2778 
2779  old_refcount = _dbus_atomic_dec (&connection->refcount);
2780 
2781  _dbus_connection_trace_ref (connection, old_refcount, old_refcount - 1,
2782  "unref");
2783 
2784  if (old_refcount == 1)
2785  {
2786 #ifndef DBUS_DISABLE_CHECKS
2787  if (_dbus_transport_get_is_connected (connection->transport))
2788  {
2789  _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",
2790  connection->shareable ?
2791  "Most likely, the application called unref() too many times and removed a reference belonging to libdbus, since this is a shared connection.\n" :
2792  "Most likely, the application was supposed to call dbus_connection_close(), since this is a private connection.\n");
2793  return;
2794  }
2795 #endif
2796  _dbus_connection_last_unref (connection);
2797  }
2798 }
2799 
2800 /*
2801  * Note that the transport can disconnect itself (other end drops us)
2802  * and in that case this function never runs. So this function must
2803  * not do anything more than disconnect the transport and update the
2804  * dispatch status.
2805  *
2806  * If the transport self-disconnects, then we assume someone will
2807  * dispatch the connection to cause the dispatch status update.
2808  */
2809 static void
2810 _dbus_connection_close_possibly_shared_and_unlock (DBusConnection *connection)
2811 {
2812  DBusDispatchStatus status;
2813 
2814  HAVE_LOCK_CHECK (connection);
2815 
2816  _dbus_verbose ("Disconnecting %p\n", connection);
2817 
2818  /* We need to ref because update_dispatch_status_and_unlock will unref
2819  * the connection if it was shared and libdbus was the only remaining
2820  * refcount holder.
2821  */
2822  _dbus_connection_ref_unlocked (connection);
2823 
2824  _dbus_transport_disconnect (connection->transport);
2825 
2826  /* This has the side effect of queuing the disconnect message link
2827  * (unless we don't have enough memory, possibly, so don't assert it).
2828  * After the disconnect message link is queued, dbus_bus_get/dbus_connection_open
2829  * should never again return the newly-disconnected connection.
2830  *
2831  * However, we only unref the shared connection and exit_on_disconnect when
2832  * the disconnect message reaches the head of the message queue,
2833  * NOT when it's first queued.
2834  */
2835  status = _dbus_connection_get_dispatch_status_unlocked (connection);
2836 
2837  /* This calls out to user code */
2838  _dbus_connection_update_dispatch_status_and_unlock (connection, status);
2839 
2840  /* Could also call out to user code */
2841  dbus_connection_unref (connection);
2842 }
2843 
2886 void
2888 {
2889  _dbus_return_if_fail (connection != NULL);
2890  _dbus_return_if_fail (connection->generation == _dbus_current_generation);
2891 
2892  CONNECTION_LOCK (connection);
2893 
2894 #ifndef DBUS_DISABLE_CHECKS
2895  if (connection->shareable)
2896  {
2897  CONNECTION_UNLOCK (connection);
2898 
2899  _dbus_warn_check_failed ("Applications must not close shared connections - see dbus_connection_close() docs. This is a bug in the application.\n");
2900  return;
2901  }
2902 #endif
2903 
2904  _dbus_connection_close_possibly_shared_and_unlock (connection);
2905 }
2906 
2907 static dbus_bool_t
2908 _dbus_connection_get_is_connected_unlocked (DBusConnection *connection)
2909 {
2910  HAVE_LOCK_CHECK (connection);
2911  return _dbus_transport_get_is_connected (connection->transport);
2912 }
2913 
2929 {
2930  dbus_bool_t res;
2931 
2932  _dbus_return_val_if_fail (connection != NULL, FALSE);
2933 
2934  CONNECTION_LOCK (connection);
2935  res = _dbus_connection_get_is_connected_unlocked (connection);
2936  CONNECTION_UNLOCK (connection);
2937 
2938  return res;
2939 }
2940 
2951 {
2952  dbus_bool_t res;
2953 
2954  _dbus_return_val_if_fail (connection != NULL, FALSE);
2955 
2956  CONNECTION_LOCK (connection);
2957  res = _dbus_transport_get_is_authenticated (connection->transport);
2958  CONNECTION_UNLOCK (connection);
2959 
2960  return res;
2961 }
2962 
2985 {
2986  dbus_bool_t res;
2987 
2988  _dbus_return_val_if_fail (connection != NULL, FALSE);
2989 
2990  CONNECTION_LOCK (connection);
2991  res = _dbus_transport_get_is_anonymous (connection->transport);
2992  CONNECTION_UNLOCK (connection);
2993 
2994  return res;
2995 }
2996 
3028 char*
3030 {
3031  char *id;
3032 
3033  _dbus_return_val_if_fail (connection != NULL, NULL);
3034 
3035  CONNECTION_LOCK (connection);
3037  CONNECTION_UNLOCK (connection);
3038 
3039  return id;
3040 }
3041 
3061  int type)
3062 {
3063  _dbus_return_val_if_fail (connection != NULL, FALSE);
3064 
3065  if (!dbus_type_is_valid (type))
3066  return FALSE;
3067 
3068  if (type != DBUS_TYPE_UNIX_FD)
3069  return TRUE;
3070 
3071 #ifdef HAVE_UNIX_FD_PASSING
3072  {
3073  dbus_bool_t b;
3074 
3075  CONNECTION_LOCK(connection);
3077  CONNECTION_UNLOCK(connection);
3078 
3079  return b;
3080  }
3081 #endif
3082 
3083  return FALSE;
3084 }
3085 
3099 void
3101  dbus_bool_t exit_on_disconnect)
3102 {
3103  _dbus_return_if_fail (connection != NULL);
3104 
3105  CONNECTION_LOCK (connection);
3106  connection->exit_on_disconnect = exit_on_disconnect != FALSE;
3107  CONNECTION_UNLOCK (connection);
3108 }
3109 
3121 {
3122  DBusPreallocatedSend *preallocated;
3123 
3124  _dbus_return_val_if_fail (connection != NULL, NULL);
3125 
3126  CONNECTION_LOCK (connection);
3127 
3128  preallocated =
3129  _dbus_connection_preallocate_send_unlocked (connection);
3130 
3131  CONNECTION_UNLOCK (connection);
3132 
3133  return preallocated;
3134 }
3135 
3145 void
3147  DBusPreallocatedSend *preallocated)
3148 {
3149  _dbus_return_if_fail (connection != NULL);
3150  _dbus_return_if_fail (preallocated != NULL);
3151  _dbus_return_if_fail (connection == preallocated->connection);
3152 
3153  _dbus_list_free_link (preallocated->queue_link);
3154  _dbus_counter_unref (preallocated->counter_link->data);
3155  _dbus_list_free_link (preallocated->counter_link);
3156  dbus_free (preallocated);
3157 }
3158 
3171 void
3173  DBusPreallocatedSend *preallocated,
3174  DBusMessage *message,
3175  dbus_uint32_t *client_serial)
3176 {
3177  _dbus_return_if_fail (connection != NULL);
3178  _dbus_return_if_fail (preallocated != NULL);
3179  _dbus_return_if_fail (message != NULL);
3180  _dbus_return_if_fail (preallocated->connection == connection);
3181  _dbus_return_if_fail (dbus_message_get_type (message) != DBUS_MESSAGE_TYPE_METHOD_CALL ||
3182  dbus_message_get_member (message) != NULL);
3183  _dbus_return_if_fail (dbus_message_get_type (message) != DBUS_MESSAGE_TYPE_SIGNAL ||
3184  (dbus_message_get_interface (message) != NULL &&
3185  dbus_message_get_member (message) != NULL));
3186 
3187  CONNECTION_LOCK (connection);
3188 
3189 #ifdef HAVE_UNIX_FD_PASSING
3190 
3191  if (!_dbus_transport_can_pass_unix_fd(connection->transport) &&
3192  message->n_unix_fds > 0)
3193  {
3194  /* Refuse to send fds on a connection that cannot handle
3195  them. Unfortunately we cannot return a proper error here, so
3196  the best we can is just return. */
3197  CONNECTION_UNLOCK (connection);
3198  return;
3199  }
3200 
3201 #endif
3202 
3203  _dbus_connection_send_preallocated_and_unlock (connection,
3204  preallocated,
3205  message, client_serial);
3206 }
3207 
3208 static dbus_bool_t
3209 _dbus_connection_send_unlocked_no_update (DBusConnection *connection,
3210  DBusMessage *message,
3211  dbus_uint32_t *client_serial)
3212 {
3213  DBusPreallocatedSend *preallocated;
3214 
3215  _dbus_assert (connection != NULL);
3216  _dbus_assert (message != NULL);
3217 
3218  preallocated = _dbus_connection_preallocate_send_unlocked (connection);
3219  if (preallocated == NULL)
3220  return FALSE;
3221 
3222  _dbus_connection_send_preallocated_unlocked_no_update (connection,
3223  preallocated,
3224  message,
3225  client_serial);
3226  return TRUE;
3227 }
3228 
3258  DBusMessage *message,
3259  dbus_uint32_t *serial)
3260 {
3261  _dbus_return_val_if_fail (connection != NULL, FALSE);
3262  _dbus_return_val_if_fail (message != NULL, FALSE);
3263 
3264  CONNECTION_LOCK (connection);
3265 
3266 #ifdef HAVE_UNIX_FD_PASSING
3267 
3268  if (!_dbus_transport_can_pass_unix_fd(connection->transport) &&
3269  message->n_unix_fds > 0)
3270  {
3271  /* Refuse to send fds on a connection that cannot handle
3272  them. Unfortunately we cannot return a proper error here, so
3273  the best we can is just return. */
3274  CONNECTION_UNLOCK (connection);
3275  return FALSE;
3276  }
3277 
3278 #endif
3279 
3280  return _dbus_connection_send_and_unlock (connection,
3281  message,
3282  serial);
3283 }
3284 
3285 static dbus_bool_t
3286 reply_handler_timeout (void *data)
3287 {
3288  DBusConnection *connection;
3289  DBusDispatchStatus status;
3290  DBusPendingCall *pending = data;
3291 
3292  connection = _dbus_pending_call_get_connection_and_lock (pending);
3293  _dbus_connection_ref_unlocked (connection);
3294 
3296  connection);
3300 
3301  _dbus_verbose ("middle\n");
3302  status = _dbus_connection_get_dispatch_status_unlocked (connection);
3303 
3304  /* Unlocks, and calls out to user code */
3305  _dbus_connection_update_dispatch_status_and_unlock (connection, status);
3306  dbus_connection_unref (connection);
3307 
3308  return TRUE;
3309 }
3310 
3355  DBusMessage *message,
3356  DBusPendingCall **pending_return,
3357  int timeout_milliseconds)
3358 {
3359  DBusPendingCall *pending;
3360  dbus_int32_t serial = -1;
3361  DBusDispatchStatus status;
3362 
3363  _dbus_return_val_if_fail (connection != NULL, FALSE);
3364  _dbus_return_val_if_fail (message != NULL, FALSE);
3365  _dbus_return_val_if_fail (timeout_milliseconds >= 0 || timeout_milliseconds == -1, FALSE);
3366 
3367  if (pending_return)
3368  *pending_return = NULL;
3369 
3370  CONNECTION_LOCK (connection);
3371 
3372 #ifdef HAVE_UNIX_FD_PASSING
3373 
3374  if (!_dbus_transport_can_pass_unix_fd(connection->transport) &&
3375  message->n_unix_fds > 0)
3376  {
3377  /* Refuse to send fds on a connection that cannot handle
3378  them. Unfortunately we cannot return a proper error here, so
3379  the best we can do is return TRUE but leave *pending_return
3380  as NULL. */
3381  CONNECTION_UNLOCK (connection);
3382  return TRUE;
3383  }
3384 
3385 #endif
3386 
3387  if (!_dbus_connection_get_is_connected_unlocked (connection))
3388  {
3389  CONNECTION_UNLOCK (connection);
3390 
3391  return TRUE;
3392  }
3393 
3394  pending = _dbus_pending_call_new_unlocked (connection,
3395  timeout_milliseconds,
3396  reply_handler_timeout);
3397 
3398  if (pending == NULL)
3399  {
3400  CONNECTION_UNLOCK (connection);
3401  return FALSE;
3402  }
3403 
3404  /* Assign a serial to the message */
3405  serial = dbus_message_get_serial (message);
3406  if (serial == 0)
3407  {
3408  serial = _dbus_connection_get_next_client_serial (connection);
3409  dbus_message_set_serial (message, serial);
3410  }
3411 
3412  if (!_dbus_pending_call_set_timeout_error_unlocked (pending, message, serial))
3413  goto error;
3414 
3415  /* Insert the serial in the pending replies hash;
3416  * hash takes a refcount on DBusPendingCall.
3417  * Also, add the timeout.
3418  */
3419  if (!_dbus_connection_attach_pending_call_unlocked (connection,
3420  pending))
3421  goto error;
3422 
3423  if (!_dbus_connection_send_unlocked_no_update (connection, message, NULL))
3424  {
3425  _dbus_connection_detach_pending_call_and_unlock (connection,
3426  pending);
3427  goto error_unlocked;
3428  }
3429 
3430  if (pending_return)
3431  *pending_return = pending; /* hand off refcount */
3432  else
3433  {
3434  _dbus_connection_detach_pending_call_unlocked (connection, pending);
3435  /* we still have a ref to the pending call in this case, we unref
3436  * after unlocking, below
3437  */
3438  }
3439 
3440  status = _dbus_connection_get_dispatch_status_unlocked (connection);
3441 
3442  /* this calls out to user code */
3443  _dbus_connection_update_dispatch_status_and_unlock (connection, status);
3444 
3445  if (pending_return == NULL)
3446  dbus_pending_call_unref (pending);
3447 
3448  return TRUE;
3449 
3450  error:
3451  CONNECTION_UNLOCK (connection);
3452  error_unlocked:
3453  dbus_pending_call_unref (pending);
3454  return FALSE;
3455 }
3456 
3489 DBusMessage*
3491  DBusMessage *message,
3492  int timeout_milliseconds,
3493  DBusError *error)
3494 {
3495  DBusMessage *reply;
3496  DBusPendingCall *pending;
3497 
3498  _dbus_return_val_if_fail (connection != NULL, NULL);
3499  _dbus_return_val_if_fail (message != NULL, NULL);
3500  _dbus_return_val_if_fail (timeout_milliseconds >= 0 || timeout_milliseconds == -1, NULL);
3501  _dbus_return_val_if_error_is_set (error, NULL);
3502 
3503 #ifdef HAVE_UNIX_FD_PASSING
3504 
3505  CONNECTION_LOCK (connection);
3506  if (!_dbus_transport_can_pass_unix_fd(connection->transport) &&
3507  message->n_unix_fds > 0)
3508  {
3509  CONNECTION_UNLOCK (connection);
3510  dbus_set_error(error, DBUS_ERROR_FAILED, "Cannot send file descriptors on this connection.");
3511  return NULL;
3512  }
3513  CONNECTION_UNLOCK (connection);
3514 
3515 #endif
3516 
3517  if (!dbus_connection_send_with_reply (connection, message,
3518  &pending, timeout_milliseconds))
3519  {
3520  _DBUS_SET_OOM (error);
3521  return NULL;
3522  }
3523 
3524  if (pending == NULL)
3525  {
3526  dbus_set_error (error, DBUS_ERROR_DISCONNECTED, "Connection is closed");
3527  return NULL;
3528  }
3529 
3530  dbus_pending_call_block (pending);
3531 
3532  reply = dbus_pending_call_steal_reply (pending);
3533  dbus_pending_call_unref (pending);
3534 
3535  /* call_complete_and_unlock() called from pending_call_block() should
3536  * always fill this in.
3537  */
3538  _dbus_assert (reply != NULL);
3539 
3540  if (dbus_set_error_from_message (error, reply))
3541  {
3542  dbus_message_unref (reply);
3543  return NULL;
3544  }
3545  else
3546  return reply;
3547 }
3548 
3557 static DBusDispatchStatus
3558 _dbus_connection_flush_unlocked (DBusConnection *connection)
3559 {
3560  /* We have to specify DBUS_ITERATION_DO_READING here because
3561  * otherwise we could have two apps deadlock if they are both doing
3562  * a flush(), and the kernel buffers fill up. This could change the
3563  * dispatch status.
3564  */
3565  DBusDispatchStatus status;
3566 
3567  HAVE_LOCK_CHECK (connection);
3568 
3569  while (connection->n_outgoing > 0 &&
3570  _dbus_connection_get_is_connected_unlocked (connection))
3571  {
3572  _dbus_verbose ("doing iteration in\n");
3573  HAVE_LOCK_CHECK (connection);
3575  NULL,
3576  DBUS_ITERATION_DO_READING |
3577  DBUS_ITERATION_DO_WRITING |
3578  DBUS_ITERATION_BLOCK,
3579  -1);
3580  }
3581 
3582  HAVE_LOCK_CHECK (connection);
3583  _dbus_verbose ("middle\n");
3584  status = _dbus_connection_get_dispatch_status_unlocked (connection);
3585 
3586  HAVE_LOCK_CHECK (connection);
3587  return status;
3588 }
3589 
3595 void
3597 {
3598  /* We have to specify DBUS_ITERATION_DO_READING here because
3599  * otherwise we could have two apps deadlock if they are both doing
3600  * a flush(), and the kernel buffers fill up. This could change the
3601  * dispatch status.
3602  */
3603  DBusDispatchStatus status;
3604 
3605  _dbus_return_if_fail (connection != NULL);
3606 
3607  CONNECTION_LOCK (connection);
3608 
3609  status = _dbus_connection_flush_unlocked (connection);
3610 
3611  HAVE_LOCK_CHECK (connection);
3612  /* Unlocks and calls out to user code */
3613  _dbus_connection_update_dispatch_status_and_unlock (connection, status);
3614 
3615  _dbus_verbose ("end\n");
3616 }
3617 
3628 static dbus_bool_t
3629 _dbus_connection_read_write_dispatch (DBusConnection *connection,
3630  int timeout_milliseconds,
3631  dbus_bool_t dispatch)
3632 {
3633  DBusDispatchStatus dstatus;
3634  dbus_bool_t progress_possible;
3635 
3636  /* Need to grab a ref here in case we're a private connection and
3637  * the user drops the last ref in a handler we call; see bug
3638  * https://bugs.freedesktop.org/show_bug.cgi?id=15635
3639  */
3640  dbus_connection_ref (connection);
3641  dstatus = dbus_connection_get_dispatch_status (connection);
3642 
3643  if (dispatch && dstatus == DBUS_DISPATCH_DATA_REMAINS)
3644  {
3645  _dbus_verbose ("doing dispatch\n");
3646  dbus_connection_dispatch (connection);
3647  CONNECTION_LOCK (connection);
3648  }
3649  else if (dstatus == DBUS_DISPATCH_NEED_MEMORY)
3650  {
3651  _dbus_verbose ("pausing for memory\n");
3652  _dbus_memory_pause_based_on_timeout (timeout_milliseconds);
3653  CONNECTION_LOCK (connection);
3654  }
3655  else
3656  {
3657  CONNECTION_LOCK (connection);
3658  if (_dbus_connection_get_is_connected_unlocked (connection))
3659  {
3660  _dbus_verbose ("doing iteration\n");
3662  NULL,
3663  DBUS_ITERATION_DO_READING |
3664  DBUS_ITERATION_DO_WRITING |
3665  DBUS_ITERATION_BLOCK,
3666  timeout_milliseconds);
3667  }
3668  }
3669 
3670  HAVE_LOCK_CHECK (connection);
3671  /* If we can dispatch, we can make progress until the Disconnected message
3672  * has been processed; if we can only read/write, we can make progress
3673  * as long as the transport is open.
3674  */
3675  if (dispatch)
3676  progress_possible = connection->n_incoming != 0 ||
3677  connection->disconnect_message_link != NULL;
3678  else
3679  progress_possible = _dbus_connection_get_is_connected_unlocked (connection);
3680 
3681  CONNECTION_UNLOCK (connection);
3682 
3683  dbus_connection_unref (connection);
3684 
3685  return progress_possible; /* TRUE if we can make more progress */
3686 }
3687 
3688 
3725  int timeout_milliseconds)
3726 {
3727  _dbus_return_val_if_fail (connection != NULL, FALSE);
3728  _dbus_return_val_if_fail (timeout_milliseconds >= 0 || timeout_milliseconds == -1, FALSE);
3729  return _dbus_connection_read_write_dispatch(connection, timeout_milliseconds, TRUE);
3730 }
3731 
3755 dbus_bool_t
3757  int timeout_milliseconds)
3758 {
3759  _dbus_return_val_if_fail (connection != NULL, FALSE);
3760  _dbus_return_val_if_fail (timeout_milliseconds >= 0 || timeout_milliseconds == -1, FALSE);
3761  return _dbus_connection_read_write_dispatch(connection, timeout_milliseconds, FALSE);
3762 }
3763 
3764 /* We need to call this anytime we pop the head of the queue, and then
3765  * update_dispatch_status_and_unlock needs to be called afterward
3766  * which will "process" the disconnected message and set
3767  * disconnected_message_processed.
3768  */
3769 static void
3770 check_disconnected_message_arrived_unlocked (DBusConnection *connection,
3771  DBusMessage *head_of_queue)
3772 {
3773  HAVE_LOCK_CHECK (connection);
3774 
3775  /* checking that the link is NULL is an optimization to avoid the is_signal call */
3776  if (connection->disconnect_message_link == NULL &&
3777  dbus_message_is_signal (head_of_queue,
3779  "Disconnected"))
3780  {
3781  connection->disconnected_message_arrived = TRUE;
3782  }
3783 }
3784 
3804 DBusMessage*
3806 {
3807  DBusDispatchStatus status;
3808  DBusMessage *message;
3809 
3810  _dbus_return_val_if_fail (connection != NULL, NULL);
3811 
3812  _dbus_verbose ("start\n");
3813 
3814  /* this is called for the side effect that it queues
3815  * up any messages from the transport
3816  */
3817  status = dbus_connection_get_dispatch_status (connection);
3818  if (status != DBUS_DISPATCH_DATA_REMAINS)
3819  return NULL;
3820 
3821  CONNECTION_LOCK (connection);
3822 
3823  _dbus_connection_acquire_dispatch (connection);
3824 
3825  /* While a message is outstanding, the dispatch lock is held */
3826  _dbus_assert (connection->message_borrowed == NULL);
3827 
3828  connection->message_borrowed = _dbus_list_get_first (&connection->incoming_messages);
3829 
3830  message = connection->message_borrowed;
3831 
3832  check_disconnected_message_arrived_unlocked (connection, message);
3833 
3834  /* Note that we KEEP the dispatch lock until the message is returned */
3835  if (message == NULL)
3836  _dbus_connection_release_dispatch (connection);
3837 
3838  CONNECTION_UNLOCK (connection);
3839 
3840  _dbus_message_trace_ref (message, -1, -1, "dbus_connection_borrow_message");
3841 
3842  /* We don't update dispatch status until it's returned or stolen */
3843 
3844  return message;
3845 }
3846 
3855 void
3857  DBusMessage *message)
3858 {
3859  DBusDispatchStatus status;
3860 
3861  _dbus_return_if_fail (connection != NULL);
3862  _dbus_return_if_fail (message != NULL);
3863  _dbus_return_if_fail (message == connection->message_borrowed);
3864  _dbus_return_if_fail (connection->dispatch_acquired);
3865 
3866  CONNECTION_LOCK (connection);
3867 
3868  _dbus_assert (message == connection->message_borrowed);
3869 
3870  connection->message_borrowed = NULL;
3871 
3872  _dbus_connection_release_dispatch (connection);
3873 
3874  status = _dbus_connection_get_dispatch_status_unlocked (connection);
3875  _dbus_connection_update_dispatch_status_and_unlock (connection, status);
3876 
3877  _dbus_message_trace_ref (message, -1, -1, "dbus_connection_return_message");
3878 }
3879 
3889 void
3891  DBusMessage *message)
3892 {
3893  DBusMessage *pop_message;
3894  DBusDispatchStatus status;
3895 
3896  _dbus_return_if_fail (connection != NULL);
3897  _dbus_return_if_fail (message != NULL);
3898  _dbus_return_if_fail (message == connection->message_borrowed);
3899  _dbus_return_if_fail (connection->dispatch_acquired);
3900 
3901  CONNECTION_LOCK (connection);
3902 
3903  _dbus_assert (message == connection->message_borrowed);
3904 
3905  pop_message = _dbus_list_pop_first (&connection->incoming_messages);
3906  _dbus_assert (message == pop_message);
3907  (void) pop_message; /* unused unless asserting */
3908 
3909  connection->n_incoming -= 1;
3910 
3911  _dbus_verbose ("Incoming message %p stolen from queue, %d incoming\n",
3912  message, connection->n_incoming);
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  _dbus_message_trace_ref (message, -1, -1,
3921  "dbus_connection_steal_borrowed_message");
3922 }
3923 
3924 /* See dbus_connection_pop_message, but requires the caller to own
3925  * the lock before calling. May drop the lock while running.
3926  */
3927 static DBusList*
3928 _dbus_connection_pop_message_link_unlocked (DBusConnection *connection)
3929 {
3930  HAVE_LOCK_CHECK (connection);
3931 
3932  _dbus_assert (connection->message_borrowed == NULL);
3933 
3934  if (connection->n_incoming > 0)
3935  {
3936  DBusList *link;
3937 
3938  link = _dbus_list_pop_first_link (&connection->incoming_messages);
3939  connection->n_incoming -= 1;
3940 
3941  _dbus_verbose ("Message %p (%s %s %s %s '%s') removed from incoming queue %p, %d incoming\n",
3942  link->data,
3944  dbus_message_get_path (link->data) ?
3945  dbus_message_get_path (link->data) :
3946  "no path",
3949  "no interface",
3950  dbus_message_get_member (link->data) ?
3951  dbus_message_get_member (link->data) :
3952  "no member",
3954  connection, connection->n_incoming);
3955 
3956  _dbus_message_trace_ref (link->data, -1, -1,
3957  "_dbus_connection_pop_message_link_unlocked");
3958 
3959  check_disconnected_message_arrived_unlocked (connection, link->data);
3960 
3961  return link;
3962  }
3963  else
3964  return NULL;
3965 }
3966 
3967 /* See dbus_connection_pop_message, but requires the caller to own
3968  * the lock before calling. May drop the lock while running.
3969  */
3970 static DBusMessage*
3971 _dbus_connection_pop_message_unlocked (DBusConnection *connection)
3972 {
3973  DBusList *link;
3974 
3975  HAVE_LOCK_CHECK (connection);
3976 
3977  link = _dbus_connection_pop_message_link_unlocked (connection);
3978 
3979  if (link != NULL)
3980  {
3981  DBusMessage *message;
3982 
3983  message = link->data;
3984 
3985  _dbus_list_free_link (link);
3986 
3987  return message;
3988  }
3989  else
3990  return NULL;
3991 }
3992 
3993 static void
3994 _dbus_connection_putback_message_link_unlocked (DBusConnection *connection,
3995  DBusList *message_link)
3996 {
3997  HAVE_LOCK_CHECK (connection);
3998 
3999  _dbus_assert (message_link != NULL);
4000  /* You can't borrow a message while a link is outstanding */
4001  _dbus_assert (connection->message_borrowed == NULL);
4002  /* We had to have the dispatch lock across the pop/putback */
4003  _dbus_assert (connection->dispatch_acquired);
4004 
4006  message_link);
4007  connection->n_incoming += 1;
4008 
4009  _dbus_verbose ("Message %p (%s %s %s '%s') put back into queue %p, %d incoming\n",
4010  message_link->data,
4012  dbus_message_get_interface (message_link->data) ?
4013  dbus_message_get_interface (message_link->data) :
4014  "no interface",
4015  dbus_message_get_member (message_link->data) ?
4016  dbus_message_get_member (message_link->data) :
4017  "no member",
4018  dbus_message_get_signature (message_link->data),
4019  connection, connection->n_incoming);
4020 
4021  _dbus_message_trace_ref (message_link->data, -1, -1,
4022  "_dbus_connection_putback_message_link_unlocked");
4023 }
4024 
4044 DBusMessage*
4046 {
4047  DBusMessage *message;
4048  DBusDispatchStatus status;
4049 
4050  _dbus_verbose ("start\n");
4051 
4052  /* this is called for the side effect that it queues
4053  * up any messages from the transport
4054  */
4055  status = dbus_connection_get_dispatch_status (connection);
4056  if (status != DBUS_DISPATCH_DATA_REMAINS)
4057  return NULL;
4058 
4059  CONNECTION_LOCK (connection);
4060  _dbus_connection_acquire_dispatch (connection);
4061  HAVE_LOCK_CHECK (connection);
4062 
4063  message = _dbus_connection_pop_message_unlocked (connection);
4064 
4065  _dbus_verbose ("Returning popped message %p\n", message);
4066 
4067  _dbus_connection_release_dispatch (connection);
4068 
4069  status = _dbus_connection_get_dispatch_status_unlocked (connection);
4070  _dbus_connection_update_dispatch_status_and_unlock (connection, status);
4071 
4072  return message;
4073 }
4074 
4082 static void
4083 _dbus_connection_acquire_dispatch (DBusConnection *connection)
4084 {
4085  HAVE_LOCK_CHECK (connection);
4086 
4087  _dbus_connection_ref_unlocked (connection);
4088  CONNECTION_UNLOCK (connection);
4089 
4090  _dbus_verbose ("locking dispatch_mutex\n");
4091  _dbus_cmutex_lock (connection->dispatch_mutex);
4092 
4093  while (connection->dispatch_acquired)
4094  {
4095  _dbus_verbose ("waiting for dispatch to be acquirable\n");
4096  _dbus_condvar_wait (connection->dispatch_cond,
4097  connection->dispatch_mutex);
4098  }
4099 
4100  _dbus_assert (!connection->dispatch_acquired);
4101 
4102  connection->dispatch_acquired = TRUE;
4103 
4104  _dbus_verbose ("unlocking dispatch_mutex\n");
4105  _dbus_cmutex_unlock (connection->dispatch_mutex);
4106 
4107  CONNECTION_LOCK (connection);
4108  _dbus_connection_unref_unlocked (connection);
4109 }
4110 
4118 static void
4119 _dbus_connection_release_dispatch (DBusConnection *connection)
4120 {
4121  HAVE_LOCK_CHECK (connection);
4122 
4123  _dbus_verbose ("locking dispatch_mutex\n");
4124  _dbus_cmutex_lock (connection->dispatch_mutex);
4125 
4126  _dbus_assert (connection->dispatch_acquired);
4127 
4128  connection->dispatch_acquired = FALSE;
4129  _dbus_condvar_wake_one (connection->dispatch_cond);
4130 
4131  _dbus_verbose ("unlocking dispatch_mutex\n");
4132  _dbus_cmutex_unlock (connection->dispatch_mutex);
4133 }
4134 
4135 static void
4136 _dbus_connection_failed_pop (DBusConnection *connection,
4137  DBusList *message_link)
4138 {
4140  message_link);
4141  connection->n_incoming += 1;
4142 }
4143 
4144 /* Note this may be called multiple times since we don't track whether we already did it */
4145 static void
4146 notify_disconnected_unlocked (DBusConnection *connection)
4147 {
4148  HAVE_LOCK_CHECK (connection);
4149 
4150  /* Set the weakref in dbus-bus.c to NULL, so nobody will get a disconnected
4151  * connection from dbus_bus_get(). We make the same guarantee for
4152  * dbus_connection_open() but in a different way since we don't want to
4153  * unref right here; we instead check for connectedness before returning
4154  * the connection from the hash.
4155  */
4157 
4158  /* Dump the outgoing queue, we aren't going to be able to
4159  * send it now, and we'd like accessors like
4160  * dbus_connection_get_outgoing_size() to be accurate.
4161  */
4162  if (connection->n_outgoing > 0)
4163  {
4164  DBusList *link;
4165 
4166  _dbus_verbose ("Dropping %d outgoing messages since we're disconnected\n",
4167  connection->n_outgoing);
4168 
4169  while ((link = _dbus_list_get_last_link (&connection->outgoing_messages)))
4170  {
4171  _dbus_connection_message_sent_unlocked (connection, link->data);
4172  }
4173  }
4174 }
4175 
4176 /* Note this may be called multiple times since we don't track whether we already did it */
4177 static DBusDispatchStatus
4178 notify_disconnected_and_dispatch_complete_unlocked (DBusConnection *connection)
4179 {
4180  HAVE_LOCK_CHECK (connection);
4181 
4182  if (connection->disconnect_message_link != NULL)
4183  {
4184  _dbus_verbose ("Sending disconnect message\n");
4185 
4186  /* If we have pending calls, queue their timeouts - we want the Disconnected
4187  * to be the last message, after these timeouts.
4188  */
4189  connection_timeout_and_complete_all_pending_calls_unlocked (connection);
4190 
4191  /* We haven't sent the disconnect message already,
4192  * and all real messages have been queued up.
4193  */
4195  connection->disconnect_message_link);
4196  connection->disconnect_message_link = NULL;
4197 
4199  }
4200 
4201  return DBUS_DISPATCH_COMPLETE;
4202 }
4203 
4204 static DBusDispatchStatus
4205 _dbus_connection_get_dispatch_status_unlocked (DBusConnection *connection)
4206 {
4207  HAVE_LOCK_CHECK (connection);
4208 
4209  if (connection->n_incoming > 0)
4211  else if (!_dbus_transport_queue_messages (connection->transport))
4213  else
4214  {
4215  DBusDispatchStatus status;
4216  dbus_bool_t is_connected;
4217 
4218  status = _dbus_transport_get_dispatch_status (connection->transport);
4219  is_connected = _dbus_transport_get_is_connected (connection->transport);
4220 
4221  _dbus_verbose ("dispatch status = %s is_connected = %d\n",
4222  DISPATCH_STATUS_NAME (status), is_connected);
4223 
4224  if (!is_connected)
4225  {
4226  /* It's possible this would be better done by having an explicit
4227  * notification from _dbus_transport_disconnect() that would
4228  * synchronously do this, instead of waiting for the next dispatch
4229  * status check. However, probably not good to change until it causes
4230  * a problem.
4231  */
4232  notify_disconnected_unlocked (connection);
4233 
4234  /* I'm not sure this is needed; the idea is that we want to
4235  * queue the Disconnected only after we've read all the
4236  * messages, but if we're disconnected maybe we are guaranteed
4237  * to have read them all ?
4238  */
4239  if (status == DBUS_DISPATCH_COMPLETE)
4240  status = notify_disconnected_and_dispatch_complete_unlocked (connection);
4241  }
4242 
4243  if (status != DBUS_DISPATCH_COMPLETE)
4244  return status;
4245  else if (connection->n_incoming > 0)
4247  else
4248  return DBUS_DISPATCH_COMPLETE;
4249  }
4250 }
4251 
4252 static void
4253 _dbus_connection_update_dispatch_status_and_unlock (DBusConnection *connection,
4254  DBusDispatchStatus new_status)
4255 {
4256  dbus_bool_t changed;
4257  DBusDispatchStatusFunction function;
4258  void *data;
4259 
4260  HAVE_LOCK_CHECK (connection);
4261 
4262  _dbus_connection_ref_unlocked (connection);
4263 
4264  changed = new_status != connection->last_dispatch_status;
4265 
4266  connection->last_dispatch_status = new_status;
4267 
4268  function = connection->dispatch_status_function;
4269  data = connection->dispatch_status_data;
4270 
4271  if (connection->disconnected_message_arrived &&
4272  !connection->disconnected_message_processed)
4273  {
4274  connection->disconnected_message_processed = TRUE;
4275 
4276  /* this does an unref, but we have a ref
4277  * so we should not run the finalizer here
4278  * inside the lock.
4279  */
4280  connection_forget_shared_unlocked (connection);
4281 
4282  if (connection->exit_on_disconnect)
4283  {
4284  CONNECTION_UNLOCK (connection);
4285 
4286  _dbus_verbose ("Exiting on Disconnected signal\n");
4287  _dbus_exit (1);
4288  _dbus_assert_not_reached ("Call to exit() returned");
4289  }
4290  }
4291 
4292  /* We drop the lock */
4293  CONNECTION_UNLOCK (connection);
4294 
4295  if (changed && function)
4296  {
4297  _dbus_verbose ("Notifying of change to dispatch status of %p now %d (%s)\n",
4298  connection, new_status,
4299  DISPATCH_STATUS_NAME (new_status));
4300  (* function) (connection, new_status, data);
4301  }
4302 
4303  dbus_connection_unref (connection);
4304 }
4305 
4333 {
4334  DBusDispatchStatus status;
4335 
4336  _dbus_return_val_if_fail (connection != NULL, DBUS_DISPATCH_COMPLETE);
4337 
4338  _dbus_verbose ("start\n");
4339 
4340  CONNECTION_LOCK (connection);
4341 
4342  status = _dbus_connection_get_dispatch_status_unlocked (connection);
4343 
4344  CONNECTION_UNLOCK (connection);
4345 
4346  return status;
4347 }
4348 
4352 static DBusHandlerResult
4353 _dbus_connection_peer_filter_unlocked_no_update (DBusConnection *connection,
4354  DBusMessage *message)
4355 {
4356  dbus_bool_t sent = FALSE;
4357  DBusMessage *ret = NULL;
4358  DBusList *expire_link;
4359 
4360  if (connection->route_peer_messages && dbus_message_get_destination (message) != NULL)
4361  {
4362  /* This means we're letting the bus route this message */
4364  }
4365 
4367  {
4369  }
4370 
4371  /* Preallocate a linked-list link, so that if we need to dispose of a
4372  * message, we can attach it to the expired list */
4373  expire_link = _dbus_list_alloc_link (NULL);
4374 
4375  if (!expire_link)
4377 
4378  if (dbus_message_is_method_call (message,
4380  "Ping"))
4381  {
4382  ret = dbus_message_new_method_return (message);
4383  if (ret == NULL)
4384  goto out;
4385 
4386  sent = _dbus_connection_send_unlocked_no_update (connection, ret, NULL);
4387  }
4388  else if (dbus_message_is_method_call (message,
4390  "GetMachineId"))
4391  {
4392  DBusString uuid;
4393 
4394  ret = dbus_message_new_method_return (message);
4395  if (ret == NULL)
4396  goto out;
4397 
4398  _dbus_string_init (&uuid);
4400  {
4401  const char *v_STRING = _dbus_string_get_const_data (&uuid);
4402  if (dbus_message_append_args (ret,
4403  DBUS_TYPE_STRING, &v_STRING,
4405  {
4406  sent = _dbus_connection_send_unlocked_no_update (connection, ret, NULL);
4407  }
4408  }
4409  _dbus_string_free (&uuid);
4410  }
4411  else
4412  {
4413  /* We need to bounce anything else with this interface, otherwise apps
4414  * could start extending the interface and when we added extensions
4415  * here to DBusConnection we'd break those apps.
4416  */
4417  ret = dbus_message_new_error (message,
4419  "Unknown method invoked on org.freedesktop.DBus.Peer interface");
4420  if (ret == NULL)
4421  goto out;
4422 
4423  sent = _dbus_connection_send_unlocked_no_update (connection, ret, NULL);
4424  }
4425 
4426 out:
4427  if (ret == NULL)
4428  {
4429  _dbus_list_free_link (expire_link);
4430  }
4431  else
4432  {
4433  /* It'll be safe to unref the reply when we unlock */
4434  expire_link->data = ret;
4435  _dbus_list_prepend_link (&connection->expired_messages, expire_link);
4436  }
4437 
4438  if (!sent)
4440 
4442 }
4443 
4450 static DBusHandlerResult
4451 _dbus_connection_run_builtin_filters_unlocked_no_update (DBusConnection *connection,
4452  DBusMessage *message)
4453 {
4454  /* We just run one filter for now but have the option to run more
4455  if the spec calls for it in the future */
4456 
4457  return _dbus_connection_peer_filter_unlocked_no_update (connection, message);
4458 }
4459 
4504 {
4505  DBusMessage *message;
4506  DBusList *link, *filter_list_copy, *message_link;
4507  DBusHandlerResult result;
4508  DBusPendingCall *pending;
4509  dbus_int32_t reply_serial;
4510  DBusDispatchStatus status;
4511  dbus_bool_t found_object;
4512 
4513  _dbus_return_val_if_fail (connection != NULL, DBUS_DISPATCH_COMPLETE);
4514 
4515  _dbus_verbose ("\n");
4516 
4517  CONNECTION_LOCK (connection);
4518  status = _dbus_connection_get_dispatch_status_unlocked (connection);
4519  if (status != DBUS_DISPATCH_DATA_REMAINS)
4520  {
4521  /* unlocks and calls out to user code */
4522  _dbus_connection_update_dispatch_status_and_unlock (connection, status);
4523  return status;
4524  }
4525 
4526  /* We need to ref the connection since the callback could potentially
4527  * drop the last ref to it
4528  */
4529  _dbus_connection_ref_unlocked (connection);
4530 
4531  _dbus_connection_acquire_dispatch (connection);
4532  HAVE_LOCK_CHECK (connection);
4533 
4534  message_link = _dbus_connection_pop_message_link_unlocked (connection);
4535  if (message_link == NULL)
4536  {
4537  /* another thread dispatched our stuff */
4538 
4539  _dbus_verbose ("another thread dispatched message (during acquire_dispatch above)\n");
4540 
4541  _dbus_connection_release_dispatch (connection);
4542 
4543  status = _dbus_connection_get_dispatch_status_unlocked (connection);
4544 
4545  _dbus_connection_update_dispatch_status_and_unlock (connection, status);
4546 
4547  dbus_connection_unref (connection);
4548 
4549  return status;
4550  }
4551 
4552  message = message_link->data;
4553 
4554  _dbus_verbose (" dispatching message %p (%s %s %s '%s')\n",
4555  message,
4557  dbus_message_get_interface (message) ?
4558  dbus_message_get_interface (message) :
4559  "no interface",
4560  dbus_message_get_member (message) ?
4561  dbus_message_get_member (message) :
4562  "no member",
4563  dbus_message_get_signature (message));
4564 
4566 
4567  /* Pending call handling must be first, because if you do
4568  * dbus_connection_send_with_reply_and_block() or
4569  * dbus_pending_call_block() then no handlers/filters will be run on
4570  * the reply. We want consistent semantics in the case where we
4571  * dbus_connection_dispatch() the reply.
4572  */
4573 
4574  reply_serial = dbus_message_get_reply_serial (message);
4575  pending = _dbus_hash_table_lookup_int (connection->pending_replies,
4576  reply_serial);
4577  if (pending)
4578  {
4579  _dbus_verbose ("Dispatching a pending reply\n");
4580  complete_pending_call_and_unlock (connection, pending, message);
4581  pending = NULL; /* it's probably unref'd */
4582 
4583  CONNECTION_LOCK (connection);
4584  _dbus_verbose ("pending call completed in dispatch\n");
4585  result = DBUS_HANDLER_RESULT_HANDLED;
4586  goto out;
4587  }
4588 
4589  result = _dbus_connection_run_builtin_filters_unlocked_no_update (connection, message);
4591  goto out;
4592 
4593  if (!_dbus_list_copy (&connection->filter_list, &filter_list_copy))
4594  {
4595  _dbus_connection_release_dispatch (connection);
4596  HAVE_LOCK_CHECK (connection);
4597 
4598  _dbus_connection_failed_pop (connection, message_link);
4599 
4600  /* unlocks and calls user code */
4601  _dbus_connection_update_dispatch_status_and_unlock (connection,
4603  dbus_connection_unref (connection);
4604 
4606  }
4607 
4608  _dbus_list_foreach (&filter_list_copy,
4609  (DBusForeachFunction)_dbus_message_filter_ref,
4610  NULL);
4611 
4612  /* We're still protected from dispatch() reentrancy here
4613  * since we acquired the dispatcher
4614  */
4615  CONNECTION_UNLOCK (connection);
4616 
4617  link = _dbus_list_get_first_link (&filter_list_copy);
4618  while (link != NULL)
4619  {
4620  DBusMessageFilter *filter = link->data;
4621  DBusList *next = _dbus_list_get_next_link (&filter_list_copy, link);
4622 
4623  if (filter->function == NULL)
4624  {
4625  _dbus_verbose (" filter was removed in a callback function\n");
4626  link = next;
4627  continue;
4628  }
4629 
4630  _dbus_verbose (" running filter on message %p\n", message);
4631  result = (* filter->function) (connection, message, filter->user_data);
4632 
4634  break;
4635 
4636  link = next;
4637  }
4638 
4639  _dbus_list_foreach (&filter_list_copy,
4640  (DBusForeachFunction)_dbus_message_filter_unref,
4641  NULL);
4642  _dbus_list_clear (&filter_list_copy);
4643 
4644  CONNECTION_LOCK (connection);
4645 
4646  if (result == DBUS_HANDLER_RESULT_NEED_MEMORY)
4647  {
4648  _dbus_verbose ("No memory\n");
4649  goto out;
4650  }
4651  else if (result == DBUS_HANDLER_RESULT_HANDLED)
4652  {
4653  _dbus_verbose ("filter handled message in dispatch\n");
4654  goto out;
4655  }
4656 
4657  /* We're still protected from dispatch() reentrancy here
4658  * since we acquired the dispatcher
4659  */
4660  _dbus_verbose (" running object path dispatch on message %p (%s %s %s '%s')\n",
4661  message,
4663  dbus_message_get_interface (message) ?
4664  dbus_message_get_interface (message) :
4665  "no interface",
4666  dbus_message_get_member (message) ?
4667  dbus_message_get_member (message) :
4668  "no member",
4669  dbus_message_get_signature (message));
4670 
4671  HAVE_LOCK_CHECK (connection);
4672  result = _dbus_object_tree_dispatch_and_unlock (connection->objects,
4673  message,
4674  &found_object);
4675 
4676  CONNECTION_LOCK (connection);
4677 
4679  {
4680  _dbus_verbose ("object tree handled message in dispatch\n");
4681  goto out;
4682  }
4683 
4685  {
4686  DBusMessage *reply;
4687  DBusString str;
4688  DBusPreallocatedSend *preallocated;
4689  DBusList *expire_link;
4690 
4691  _dbus_verbose (" sending error %s\n",
4693 
4694  if (!_dbus_string_init (&str))
4695  {
4697  _dbus_verbose ("no memory for error string in dispatch\n");
4698  goto out;
4699  }
4700 
4701  if (!_dbus_string_append_printf (&str,
4702  "Method \"%s\" with signature \"%s\" on interface \"%s\" doesn't exist\n",
4703  dbus_message_get_member (message),
4704  dbus_message_get_signature (message),
4705  dbus_message_get_interface (message)))
4706  {
4707  _dbus_string_free (&str);
4709  _dbus_verbose ("no memory for error string in dispatch\n");
4710  goto out;
4711  }
4712 
4713  reply = dbus_message_new_error (message,
4716  _dbus_string_free (&str);
4717 
4718  if (reply == NULL)
4719  {
4721  _dbus_verbose ("no memory for error reply in dispatch\n");
4722  goto out;
4723  }
4724 
4725  expire_link = _dbus_list_alloc_link (reply);
4726 
4727  if (expire_link == NULL)
4728  {
4729  dbus_message_unref (reply);
4731  _dbus_verbose ("no memory for error send in dispatch\n");
4732  goto out;
4733  }
4734 
4735  preallocated = _dbus_connection_preallocate_send_unlocked (connection);
4736 
4737  if (preallocated == NULL)
4738  {
4739  _dbus_list_free_link (expire_link);
4740  /* It's OK that this is finalized, because it hasn't been seen by
4741  * anything that could attach user callbacks */
4742  dbus_message_unref (reply);
4744  _dbus_verbose ("no memory for error send in dispatch\n");
4745  goto out;
4746  }
4747 
4748  _dbus_connection_send_preallocated_unlocked_no_update (connection, preallocated,
4749  reply, NULL);
4750  /* reply will be freed when we release the lock */
4751  _dbus_list_prepend_link (&connection->expired_messages, expire_link);
4752 
4753  result = DBUS_HANDLER_RESULT_HANDLED;
4754  }
4755 
4756  _dbus_verbose (" done dispatching %p (%s %s %s '%s') on connection %p\n", message,
4758  dbus_message_get_interface (message) ?
4759  dbus_message_get_interface (message) :
4760  "no interface",
4761  dbus_message_get_member (message) ?
4762  dbus_message_get_member (message) :
4763  "no member",
4764  dbus_message_get_signature (message),
4765  connection);
4766 
4767  out:
4768  if (result == DBUS_HANDLER_RESULT_NEED_MEMORY)
4769  {
4770  _dbus_verbose ("out of memory\n");
4771 
4772  /* Put message back, and we'll start over.
4773  * Yes this means handlers must be idempotent if they
4774  * don't return HANDLED; c'est la vie.
4775  */
4776  _dbus_connection_putback_message_link_unlocked (connection,
4777  message_link);
4778  /* now we don't want to free them */
4779  message_link = NULL;
4780  message = NULL;
4781  }
4782  else
4783  {
4784  _dbus_verbose (" ... done dispatching\n");
4785  }
4786 
4787  _dbus_connection_release_dispatch (connection);
4788  HAVE_LOCK_CHECK (connection);
4789 
4790  if (message != NULL)
4791  {
4792  /* We don't want this message to count in maximum message limits when
4793  * computing the dispatch status, below. We have to drop the lock
4794  * temporarily, because finalizing a message can trigger callbacks.
4795  *
4796  * We have a reference to the connection, and we don't use any cached
4797  * pointers to the connection's internals below this point, so it should
4798  * be safe to drop the lock and take it back. */
4799  CONNECTION_UNLOCK (connection);
4800  dbus_message_unref (message);
4801  CONNECTION_LOCK (connection);
4802  }
4803 
4804  if (message_link != NULL)
4805  _dbus_list_free_link (message_link);
4806 
4807  _dbus_verbose ("before final status update\n");
4808  status = _dbus_connection_get_dispatch_status_unlocked (connection);
4809 
4810  /* unlocks and calls user code */
4811  _dbus_connection_update_dispatch_status_and_unlock (connection, status);
4812 
4813  dbus_connection_unref (connection);
4814 
4815  return status;
4816 }
4817 
4881  DBusAddWatchFunction add_function,
4882  DBusRemoveWatchFunction remove_function,
4883  DBusWatchToggledFunction toggled_function,
4884  void *data,
4885  DBusFreeFunction free_data_function)
4886 {
4887  dbus_bool_t retval;
4888 
4889  _dbus_return_val_if_fail (connection != NULL, FALSE);
4890 
4891  CONNECTION_LOCK (connection);
4892 
4893  retval = _dbus_watch_list_set_functions (connection->watches,
4894  add_function, remove_function,
4895  toggled_function,
4896  data, free_data_function);
4897 
4898  CONNECTION_UNLOCK (connection);
4899 
4900  return retval;
4901 }
4902 
4944  DBusAddTimeoutFunction add_function,
4945  DBusRemoveTimeoutFunction remove_function,
4946  DBusTimeoutToggledFunction toggled_function,
4947  void *data,
4948  DBusFreeFunction free_data_function)
4949 {
4950  dbus_bool_t retval;
4951 
4952  _dbus_return_val_if_fail (connection != NULL, FALSE);
4953 
4954  CONNECTION_LOCK (connection);
4955 
4956  retval = _dbus_timeout_list_set_functions (connection->timeouts,
4957  add_function, remove_function,
4958  toggled_function,
4959  data, free_data_function);
4960 
4961  CONNECTION_UNLOCK (connection);
4962 
4963  return retval;
4964 }
4965 
4980 void
4982  DBusWakeupMainFunction wakeup_main_function,
4983  void *data,
4984  DBusFreeFunction free_data_function)
4985 {
4986  void *old_data;
4987  DBusFreeFunction old_free_data;
4988 
4989  _dbus_return_if_fail (connection != NULL);
4990 
4991  CONNECTION_LOCK (connection);
4992  old_data = connection->wakeup_main_data;
4993  old_free_data = connection->free_wakeup_main_data;
4994 
4995  connection->wakeup_main_function = wakeup_main_function;
4996  connection->wakeup_main_data = data;
4997  connection->free_wakeup_main_data = free_data_function;
4998 
4999  CONNECTION_UNLOCK (connection);
5000 
5001  /* Callback outside the lock */
5002  if (old_free_data)
5003  (*old_free_data) (old_data);
5004 }
5005 
5026 void
5028  DBusDispatchStatusFunction function,
5029  void *data,
5030  DBusFreeFunction free_data_function)
5031 {
5032  void *old_data;
5033  DBusFreeFunction old_free_data;
5034 
5035  _dbus_return_if_fail (connection != NULL);
5036 
5037  CONNECTION_LOCK (connection);
5038  old_data = connection->dispatch_status_data;
5039  old_free_data = connection->free_dispatch_status_data;
5040 
5041  connection->dispatch_status_function = function;
5042  connection->dispatch_status_data = data;
5043  connection->free_dispatch_status_data = free_data_function;
5044 
5045  CONNECTION_UNLOCK (connection);
5046 
5047  /* Callback outside the lock */
5048  if (old_free_data)
5049  (*old_free_data) (old_data);
5050 }
5051 
5073  int *fd)
5074 {
5075  _dbus_return_val_if_fail (connection != NULL, FALSE);
5076  _dbus_return_val_if_fail (connection->transport != NULL, FALSE);
5077 
5078 #ifdef DBUS_WIN
5079  /* FIXME do this on a lower level */
5080  return FALSE;
5081 #endif
5082 
5083  return dbus_connection_get_socket(connection, fd);
5084 }
5085 
5103  int *fd)
5104 {
5105  dbus_bool_t retval;
5106 
5107  _dbus_return_val_if_fail (connection != NULL, FALSE);
5108  _dbus_return_val_if_fail (connection->transport != NULL, FALSE);
5109 
5110  CONNECTION_LOCK (connection);
5111 
5112  retval = _dbus_transport_get_socket_fd (connection->transport,
5113  fd);
5114 
5115  CONNECTION_UNLOCK (connection);
5116 
5117  return retval;
5118 }
5119 
5120 
5145  unsigned long *uid)
5146 {
5147  dbus_bool_t result;
5148 
5149  _dbus_return_val_if_fail (connection != NULL, FALSE);
5150  _dbus_return_val_if_fail (uid != NULL, FALSE);
5151 
5152  CONNECTION_LOCK (connection);
5153 
5155  result = FALSE;
5156  else
5157  result = _dbus_transport_get_unix_user (connection->transport,
5158  uid);
5159 
5160 #ifdef DBUS_WIN
5161  _dbus_assert (!result);
5162 #endif
5163 
5164  CONNECTION_UNLOCK (connection);
5165 
5166  return result;
5167 }
5168 
5181  unsigned long *pid)
5182 {
5183  dbus_bool_t result;
5184 
5185  _dbus_return_val_if_fail (connection != NULL, FALSE);
5186  _dbus_return_val_if_fail (pid != NULL, FALSE);
5187 
5188  CONNECTION_LOCK (connection);
5189 
5191  result = FALSE;
5192  else
5193  result = _dbus_transport_get_unix_process_id (connection->transport,
5194  pid);
5195 
5196  CONNECTION_UNLOCK (connection);
5197 
5198  return result;
5199 }
5200 
5213  void **data,
5214  dbus_int32_t *data_size)
5215 {
5216  dbus_bool_t result;
5217 
5218  _dbus_return_val_if_fail (connection != NULL, FALSE);
5219  _dbus_return_val_if_fail (data != NULL, FALSE);
5220  _dbus_return_val_if_fail (data_size != NULL, FALSE);
5221 
5222  CONNECTION_LOCK (connection);
5223 
5225  result = FALSE;
5226  else
5228  data,
5229  data_size);
5230  CONNECTION_UNLOCK (connection);
5231 
5232  return result;
5233 }
5234 
5257 void
5259  DBusAllowUnixUserFunction function,
5260  void *data,
5261  DBusFreeFunction free_data_function)
5262 {
5263  void *old_data = NULL;
5264  DBusFreeFunction old_free_function = NULL;
5265 
5266  _dbus_return_if_fail (connection != NULL);
5267 
5268  CONNECTION_LOCK (connection);
5270  function, data, free_data_function,
5271  &old_data, &old_free_function);
5272  CONNECTION_UNLOCK (connection);
5273 
5274  if (old_free_function != NULL)
5275  (* old_free_function) (old_data);
5276 }
5277 
5311  char **windows_sid_p)
5312 {
5313  dbus_bool_t result;
5314 
5315  _dbus_return_val_if_fail (connection != NULL, FALSE);
5316  _dbus_return_val_if_fail (windows_sid_p != NULL, FALSE);
5317 
5318  CONNECTION_LOCK (connection);
5319 
5321  result = FALSE;
5322  else
5323  result = _dbus_transport_get_windows_user (connection->transport,
5324  windows_sid_p);
5325 
5326 #ifdef DBUS_UNIX
5327  _dbus_assert (!result);
5328 #endif
5329 
5330  CONNECTION_UNLOCK (connection);
5331 
5332  return result;
5333 }
5334 
5356 void
5359  void *data,
5360  DBusFreeFunction free_data_function)
5361 {
5362  void *old_data = NULL;
5363  DBusFreeFunction old_free_function = NULL;
5364 
5365  _dbus_return_if_fail (connection != NULL);
5366 
5367  CONNECTION_LOCK (connection);
5369  function, data, free_data_function,
5370  &old_data, &old_free_function);
5371  CONNECTION_UNLOCK (connection);
5372 
5373  if (old_free_function != NULL)
5374  (* old_free_function) (old_data);
5375 }
5376 
5403 void
5405  dbus_bool_t value)
5406 {
5407  _dbus_return_if_fail (connection != NULL);
5408 
5409  CONNECTION_LOCK (connection);
5410  _dbus_transport_set_allow_anonymous (connection->transport, value);
5411  CONNECTION_UNLOCK (connection);
5412 }
5413 
5431 void
5433  dbus_bool_t value)
5434 {
5435  _dbus_return_if_fail (connection != NULL);
5436 
5437  CONNECTION_LOCK (connection);
5438  connection->route_peer_messages = TRUE;
5439  CONNECTION_UNLOCK (connection);
5440 }
5441 
5465  DBusHandleMessageFunction function,
5466  void *user_data,
5467  DBusFreeFunction free_data_function)
5468 {
5469  DBusMessageFilter *filter;
5470 
5471  _dbus_return_val_if_fail (connection != NULL, FALSE);
5472  _dbus_return_val_if_fail (function != NULL, FALSE);
5473 
5474  filter = dbus_new0 (DBusMessageFilter, 1);
5475  if (filter == NULL)
5476  return FALSE;
5477 
5478  _dbus_atomic_inc (&filter->refcount);
5479 
5480  CONNECTION_LOCK (connection);
5481 
5482  if (!_dbus_list_append (&connection->filter_list,
5483  filter))
5484  {
5485  _dbus_message_filter_unref (filter);
5486  CONNECTION_UNLOCK (connection);
5487  return FALSE;
5488  }
5489 
5490  /* Fill in filter after all memory allocated,
5491  * so we don't run the free_user_data_function
5492  * if the add_filter() fails
5493  */
5494 
5495  filter->function = function;
5496  filter->user_data = user_data;
5497  filter->free_user_data_function = free_data_function;
5498 
5499  CONNECTION_UNLOCK (connection);
5500  return TRUE;
5501 }
5502 
5515 void
5517  DBusHandleMessageFunction function,
5518  void *user_data)
5519 {
5520  DBusList *link;
5521  DBusMessageFilter *filter;
5522 
5523  _dbus_return_if_fail (connection != NULL);
5524  _dbus_return_if_fail (function != NULL);
5525 
5526  CONNECTION_LOCK (connection);
5527 
5528  filter = NULL;
5529 
5530  link = _dbus_list_get_last_link (&connection->filter_list);
5531  while (link != NULL)
5532  {
5533  filter = link->data;
5534 
5535  if (filter->function == function &&
5536  filter->user_data == user_data)
5537  {
5538  _dbus_list_remove_link (&connection->filter_list, link);
5539  filter->function = NULL;
5540 
5541  break;
5542  }
5543 
5544  link = _dbus_list_get_prev_link (&connection->filter_list, link);
5545  filter = NULL;
5546  }
5547 
5548  CONNECTION_UNLOCK (connection);
5549 
5550 #ifndef DBUS_DISABLE_CHECKS
5551  if (filter == NULL)
5552  {
5553  _dbus_warn_check_failed ("Attempt to remove filter function %p user data %p, but no such filter has been added\n",
5554  function, user_data);
5555  return;
5556  }
5557 #endif
5558 
5559  /* Call application code */
5560  if (filter->free_user_data_function)
5561  (* filter->free_user_data_function) (filter->user_data);
5562 
5563  filter->free_user_data_function = NULL;
5564  filter->user_data = NULL;
5565 
5566  _dbus_message_filter_unref (filter);
5567 }
5568 
5584 static dbus_bool_t
5585 _dbus_connection_register_object_path (DBusConnection *connection,
5586  dbus_bool_t fallback,
5587  const char *path,
5588  const DBusObjectPathVTable *vtable,
5589  void *user_data,
5590  DBusError *error)
5591 {
5592  char **decomposed_path;
5593  dbus_bool_t retval;
5594 
5595  if (!_dbus_decompose_path (path, strlen (path), &decomposed_path, NULL))
5596  return FALSE;
5597 
5598  CONNECTION_LOCK (connection);
5599 
5600  retval = _dbus_object_tree_register (connection->objects,
5601  fallback,
5602  (const char **) decomposed_path, vtable,
5603  user_data, error);
5604 
5605  CONNECTION_UNLOCK (connection);
5606 
5607  dbus_free_string_array (decomposed_path);
5608 
5609  return retval;
5610 }
5611 
5626  const char *path,
5627  const DBusObjectPathVTable *vtable,
5628  void *user_data,
5629  DBusError *error)
5630 {
5631  _dbus_return_val_if_fail (connection != NULL, FALSE);
5632  _dbus_return_val_if_fail (path != NULL, FALSE);
5633  _dbus_return_val_if_fail (path[0] == '/', FALSE);
5634  _dbus_return_val_if_fail (vtable != NULL, FALSE);
5635 
5636  return _dbus_connection_register_object_path (connection, FALSE, path, vtable, user_data, error);
5637 }
5638 
5656  const char *path,
5657  const DBusObjectPathVTable *vtable,
5658  void *user_data)
5659 {
5660  dbus_bool_t retval;
5661  DBusError error = DBUS_ERROR_INIT;
5662 
5663  _dbus_return_val_if_fail (connection != NULL, FALSE);
5664  _dbus_return_val_if_fail (path != NULL, FALSE);
5665  _dbus_return_val_if_fail (path[0] == '/', FALSE);
5666  _dbus_return_val_if_fail (vtable != NULL, FALSE);
5667 
5668  retval = _dbus_connection_register_object_path (connection, FALSE, path, vtable, user_data, &error);
5669 
5671  {
5672  _dbus_warn ("%s\n", error.message);
5673  dbus_error_free (&error);
5674  return FALSE;
5675  }
5676 
5677  return retval;
5678 }
5679 
5696  const char *path,
5697  const DBusObjectPathVTable *vtable,
5698  void *user_data,
5699  DBusError *error)
5700 {
5701  _dbus_return_val_if_fail (connection != NULL, FALSE);
5702  _dbus_return_val_if_fail (path != NULL, FALSE);
5703  _dbus_return_val_if_fail (path[0] == '/', FALSE);
5704  _dbus_return_val_if_fail (vtable != NULL, FALSE);
5705 
5706  return _dbus_connection_register_object_path (connection, TRUE, path, vtable, user_data, error);
5707 }
5708 
5728  const char *path,
5729  const DBusObjectPathVTable *vtable,
5730  void *user_data)
5731 {
5732  dbus_bool_t retval;
5733  DBusError error = DBUS_ERROR_INIT;
5734 
5735  _dbus_return_val_if_fail (connection != NULL, FALSE);
5736  _dbus_return_val_if_fail (path != NULL, FALSE);
5737  _dbus_return_val_if_fail (path[0] == '/', FALSE);
5738  _dbus_return_val_if_fail (vtable != NULL, FALSE);
5739 
5740  retval = _dbus_connection_register_object_path (connection, TRUE, path, vtable, user_data, &error);
5741 
5743  {
5744  _dbus_warn ("%s\n", error.message);
5745  dbus_error_free (&error);
5746  return FALSE;
5747  }
5748 
5749  return retval;
5750 }
5751 
5763  const char *path)
5764 {
5765  char **decomposed_path;
5766 
5767  _dbus_return_val_if_fail (connection != NULL, FALSE);
5768  _dbus_return_val_if_fail (path != NULL, FALSE);
5769  _dbus_return_val_if_fail (path[0] == '/', FALSE);
5770 
5771  if (!_dbus_decompose_path (path, strlen (path), &decomposed_path, NULL))
5772  return FALSE;
5773 
5774  CONNECTION_LOCK (connection);
5775 
5776  _dbus_object_tree_unregister_and_unlock (connection->objects, (const char **) decomposed_path);
5777 
5778  dbus_free_string_array (decomposed_path);
5779 
5780  return TRUE;
5781 }
5782 
5795  const char *path,
5796  void **data_p)
5797 {
5798  char **decomposed_path;
5799 
5800  _dbus_return_val_if_fail (connection != NULL, FALSE);
5801  _dbus_return_val_if_fail (path != NULL, FALSE);
5802  _dbus_return_val_if_fail (data_p != NULL, FALSE);
5803 
5804  *data_p = NULL;
5805 
5806  if (!_dbus_decompose_path (path, strlen (path), &decomposed_path, NULL))
5807  return FALSE;
5808 
5809  CONNECTION_LOCK (connection);
5810 
5811  *data_p = _dbus_object_tree_get_user_data_unlocked (connection->objects, (const char**) decomposed_path);
5812 
5813  CONNECTION_UNLOCK (connection);
5814 
5815  dbus_free_string_array (decomposed_path);
5816 
5817  return TRUE;
5818 }
5819 
5832  const char *parent_path,
5833  char ***child_entries)
5834 {
5835  char **decomposed_path;
5836  dbus_bool_t retval;
5837  _dbus_return_val_if_fail (connection != NULL, FALSE);
5838  _dbus_return_val_if_fail (parent_path != NULL, FALSE);
5839  _dbus_return_val_if_fail (parent_path[0] == '/', FALSE);
5840  _dbus_return_val_if_fail (child_entries != NULL, FALSE);
5841 
5842  if (!_dbus_decompose_path (parent_path, strlen (parent_path), &decomposed_path, NULL))
5843  return FALSE;
5844 
5845  CONNECTION_LOCK (connection);
5846 
5848  (const char **) decomposed_path,
5849  child_entries);
5850  dbus_free_string_array (decomposed_path);
5851 
5852  return retval;
5853 }
5854 
5855 static DBusDataSlotAllocator slot_allocator;
5856 _DBUS_DEFINE_GLOBAL_LOCK (connection_slots);
5857 
5874 {
5875  return _dbus_data_slot_allocator_alloc (&slot_allocator,
5876  &_DBUS_LOCK_NAME (connection_slots),
5877  slot_p);
5878 }
5879 
5891 void
5893 {
5894  _dbus_return_if_fail (*slot_p >= 0);
5895 
5896  _dbus_data_slot_allocator_free (&slot_allocator, slot_p);
5897 }
5898 
5923  dbus_int32_t slot,
5924  void *data,
5925  DBusFreeFunction free_data_func)
5926 {
5927  DBusFreeFunction old_free_func;
5928  void *old_data;
5929  dbus_bool_t retval;
5930 
5931  _dbus_return_val_if_fail (connection != NULL, FALSE);
5932  _dbus_return_val_if_fail (slot >= 0, FALSE);
5933 
5934  SLOTS_LOCK (connection);
5935 
5936  retval = _dbus_data_slot_list_set (&slot_allocator,
5937  &connection->slot_list,
5938  slot, data, free_data_func,
5939  &old_free_func, &old_data);
5940 
5941  SLOTS_UNLOCK (connection);
5942 
5943  if (retval)
5944  {
5945  /* Do the actual free outside the connection lock */
5946  if (old_free_func)
5947  (* old_free_func) (old_data);
5948  }
5949 
5950  return retval;
5951 }
5952 
5970 void*
5972  dbus_int32_t slot)
5973 {
5974  void *res;
5975 
5976  _dbus_return_val_if_fail (connection != NULL, NULL);
5977  _dbus_return_val_if_fail (slot >= 0, NULL);
5978 
5979  SLOTS_LOCK (connection);
5980 
5981  res = _dbus_data_slot_list_get (&slot_allocator,
5982  &connection->slot_list,
5983  slot);
5984 
5985  SLOTS_UNLOCK (connection);
5986 
5987  return res;
5988 }
5989 
5996 void
5998 {
5999  _dbus_modify_sigpipe = will_modify_sigpipe != FALSE;
6000 }
6001 
6010 void
6012  long size)
6013 {
6014  _dbus_return_if_fail (connection != NULL);
6015 
6016  CONNECTION_LOCK (connection);
6018  size);
6019  CONNECTION_UNLOCK (connection);
6020 }
6021 
6028 long
6030 {
6031  long res;
6032 
6033  _dbus_return_val_if_fail (connection != NULL, 0);
6034 
6035  CONNECTION_LOCK (connection);
6036  res = _dbus_transport_get_max_message_size (connection->transport);
6037  CONNECTION_UNLOCK (connection);
6038  return res;
6039 }
6040 
6049 void
6051  long n)
6052 {
6053  _dbus_return_if_fail (connection != NULL);
6054 
6055  CONNECTION_LOCK (connection);
6057  n);
6058  CONNECTION_UNLOCK (connection);
6059 }
6060 
6067 long
6069 {
6070  long res;
6071 
6072  _dbus_return_val_if_fail (connection != NULL, 0);
6073 
6074  CONNECTION_LOCK (connection);
6076  CONNECTION_UNLOCK (connection);
6077  return res;
6078 }
6079 
6105 void
6107  long size)
6108 {
6109  _dbus_return_if_fail (connection != NULL);
6110 
6111  CONNECTION_LOCK (connection);
6113  size);
6114  CONNECTION_UNLOCK (connection);
6115 }
6116 
6123 long
6125 {
6126  long res;
6127 
6128  _dbus_return_val_if_fail (connection != NULL, 0);
6129 
6130  CONNECTION_LOCK (connection);
6132  CONNECTION_UNLOCK (connection);
6133  return res;
6134 }
6135 
6147 void
6149  long n)
6150 {
6151  _dbus_return_if_fail (connection != NULL);
6152 
6153  CONNECTION_LOCK (connection);
6155  n);
6156  CONNECTION_UNLOCK (connection);
6157 }
6158 
6165 long
6167 {
6168  long res;
6169 
6170  _dbus_return_val_if_fail (connection != NULL, 0);
6171 
6172  CONNECTION_LOCK (connection);
6174  CONNECTION_UNLOCK (connection);
6175  return res;
6176 }
6177 
6188 long
6190 {
6191  long res;
6192 
6193  _dbus_return_val_if_fail (connection != NULL, 0);
6194 
6195  CONNECTION_LOCK (connection);
6196  res = _dbus_counter_get_size_value (connection->outgoing_counter);
6197  CONNECTION_UNLOCK (connection);
6198  return res;
6199 }
6200 
6201 #ifdef DBUS_ENABLE_STATS
6202 void
6203 _dbus_connection_get_stats (DBusConnection *connection,
6204  dbus_uint32_t *in_messages,
6205  dbus_uint32_t *in_bytes,
6206  dbus_uint32_t *in_fds,
6207  dbus_uint32_t *in_peak_bytes,
6208  dbus_uint32_t *in_peak_fds,
6209  dbus_uint32_t *out_messages,
6210  dbus_uint32_t *out_bytes,
6211  dbus_uint32_t *out_fds,
6212  dbus_uint32_t *out_peak_bytes,
6213  dbus_uint32_t *out_peak_fds)
6214 {
6215  CONNECTION_LOCK (connection);
6216 
6217  if (in_messages != NULL)
6218  *in_messages = connection->n_incoming;
6219 
6220  _dbus_transport_get_stats (connection->transport,
6221  in_bytes, in_fds, in_peak_bytes, in_peak_fds);
6222 
6223  if (out_messages != NULL)
6224  *out_messages = connection->n_outgoing;
6225 
6226  if (out_bytes != NULL)
6227  *out_bytes = _dbus_counter_get_size_value (connection->outgoing_counter);
6228 
6229  if (out_fds != NULL)
6230  *out_fds = _dbus_counter_get_unix_fd_value (connection->outgoing_counter);
6231 
6232  if (out_peak_bytes != NULL)
6233  *out_peak_bytes = _dbus_counter_get_peak_size_value (connection->outgoing_counter);
6234 
6235  if (out_peak_fds != NULL)
6236  *out_peak_fds = _dbus_counter_get_peak_unix_fd_value (connection->outgoing_counter);
6237 
6238  CONNECTION_UNLOCK (connection);
6239 }
6240 #endif /* DBUS_ENABLE_STATS */
6241 
6249 long
6251 {
6252  long res;
6253 
6254  _dbus_return_val_if_fail (connection != NULL, 0);
6255 
6256  CONNECTION_LOCK (connection);
6258  CONNECTION_UNLOCK (connection);
6259  return res;
6260 }
6261 
6262 #ifdef DBUS_BUILD_TESTS
6263 
6269 const char*
6270 _dbus_connection_get_address (DBusConnection *connection)
6271 {
6272  return _dbus_transport_get_address (connection->transport);
6273 }
6274 #endif
6275 
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
unsigned int dbus_uint32_t
A 32-bit unsigned integer on all platforms.
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...
An atomic integer safe to increment or decrement from multiple threads.
Definition: dbus-sysdeps.h:229
void _dbus_pending_call_complete(DBusPendingCall *pending)
Calls notifier function for the pending call and sets the call to completed.
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...
DBusMessage * dbus_message_ref(DBusMessage *message)
Increments the reference count of a DBusMessage.
DBusList * filter_list
List of filters.
void _dbus_transport_set_max_received_unix_fds(DBusTransport *transport, long n)
See dbus_connection_set_max_received_unix_fds().
Internals of DBusTimeout.
Definition: dbus-timeout.c:40
void * user_data
User data for the function.
void dbus_message_lock(DBusMessage *message)
Locks a message.
Definition: dbus-message.c:383
void * _dbus_list_get_last(DBusList **list)
Gets the last data in the list.
Definition: dbus-list.c:585
void _dbus_connection_toggle_watch_unlocked(DBusConnection *connection, DBusWatch *watch, dbus_bool_t enabled)
Toggles a watch and notifies app via connection&#39;s DBusWatchToggledFunction if available.
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_list_prepend(DBusList **list, void *data)
Prepends a value to the list.
Definition: dbus-list.c:281
void(* DBusTimeoutToggledFunction)(DBusTimeout *timeout, void *data)
Called when dbus_timeout_get_enabled() may return a different value than it did before.
int _dbus_hash_table_get_n_entries(DBusHashTable *table)
Gets the number of hash entries in a hash table.
Definition: dbus-hash.c:1397
DBusDispatchStatus
Indicates the status of incoming data on a DBusConnection.
const char * message
public error message field
Definition: dbus-errors.h:51
const char * _dbus_transport_get_address(DBusTransport *transport)
Gets the address of a transport.
dbus_int32_t _dbus_atomic_get(DBusAtomic *atomic)
Atomically get the value of an integer.
DBusFreeFunction free_wakeup_main_data
free wakeup_main_data
Implementation of DBusWatch.
Definition: dbus-watch.c:40
#define NULL
A null pointer, defined appropriately for C or C++.
void(* DBusFreeFunction)(void *memory)
The type of a function which frees a block of memory.
Definition: dbus-memory.h:64
dbus_bool_t _dbus_connection_add_timeout_unlocked(DBusConnection *connection, DBusTimeout *timeout)
Adds a timeout using the connection&#39;s DBusAddTimeoutFunction if available.
DBusList * queue_link
Preallocated link in the queue.
unsigned int have_connection_lock
Used to check locking.
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, the other end of the connection may (but is not required to) optimize by not sending method return or error replies.
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:239
void(* DBusRemoveWatchFunction)(DBusWatch *watch, void *data)
Called when libdbus no longer needs a watch to be monitored by the main loop.
void _dbus_connection_queue_synthesized_message_link(DBusConnection *connection, DBusList *link)
Adds a link + message to the incoming message queue.
DBusConnection * _dbus_pending_call_get_connection_unlocked(DBusPendingCall *pending)
Gets the connection associated with this pending call.
void _dbus_object_tree_free_all_unlocked(DBusObjectTree *tree)
Free all the handlers in the tree.
More memory is needed to continue.
void dbus_free(void *memory)
Frees a block of memory previously allocated by dbus_malloc() or dbus_malloc0().
Definition: dbus-memory.c:700
dbus_uint32_t dbus_message_get_serial(DBusMessage *message)
Returns the serial of a message or 0 if none has been specified.
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:304
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...
DBusWatchList * _dbus_watch_list_new(void)
Creates a new watch list.
Definition: dbus-watch.c:232
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, or for a timeout.
Definition: dbus-threads.c:323
DBusList * _dbus_list_get_last_link(DBusList **list)
Gets the last link in the list.
Definition: dbus-list.c:569
dbus_bool_t dbus_connection_get_windows_user(DBusConnection *connection, char **windows_sid_p)
Gets the Windows user SID of the connection if known.
void _dbus_connection_lock(DBusConnection *connection)
Acquires the connection lock.
DBusMessage * dbus_pending_call_steal_reply(DBusPendingCall *pending)
Gets the reply, or returns NULL if none has been received yet.
#define dbus_new(type, count)
Safe macro for using dbus_malloc().
Definition: dbus-memory.h:58
DBusList * disconnect_message_link
Preallocated list node for queueing the disconnection message.
dbus_bool_t(* DBusWatchAddFunction)(DBusWatchList *list, DBusWatch *watch)
Function to be called in protected_change_watch() with refcount held.
void(* DBusDispatchStatusFunction)(DBusConnection *connection, DBusDispatchStatus new_status, void *data)
Called when the return value of dbus_connection_get_dispatch_status() may have changed.
void dbus_connection_set_max_message_size(DBusConnection *connection, long size)
Specifies the maximum size message this connection is allowed to receive.
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.
void _dbus_list_remove_link(DBusList **list, DBusList *link)
Removes a link from the list.
Definition: dbus-list.c:516
void _dbus_timeout_list_free(DBusTimeoutList *timeout_list)
Frees a DBusTimeoutList.
Definition: dbus-timeout.c:211
long dbus_connection_get_outgoing_size(DBusConnection *connection)
Gets the approximate size in bytes of all messages in the outgoing message queue. ...
DBusConnection * dbus_connection_ref(DBusConnection *connection)
Increments the reference count of a DBusConnection.
dbus_bool_t dbus_connection_can_send_type(DBusConnection *connection, int type)
Tests whether a certain type can be send via the connection.
DBusMessage * message_borrowed
Filled in if the first incoming message has been borrowed; dispatch_acquired will be set by the borro...
#define DBUS_TYPE_STRING
Type code marking a UTF-8 encoded, nul-terminated Unicode string.
DBusTimeoutList * _dbus_timeout_list_new(void)
Creates a new timeout list.
Definition: dbus-timeout.c:194
#define _dbus_assert(condition)
Aborts with an error message if the condition is false.
dbus_bool_t dbus_connection_read_write(DBusConnection *connection, int timeout_milliseconds)
This function is intended for use with applications that don&#39;t want to write a main loop and deal wit...
unsigned int shareable
TRUE if libdbus owns a reference to the connection and can return it from dbus_connection_open() more...
dbus_bool_t dbus_message_has_interface(DBusMessage *message, const char *interface)
Checks if the message has an interface.
void _dbus_list_append_link(DBusList **list, DBusList *link)
Appends a link to the list.
Definition: dbus-list.c:304
Internals of DBusCounter.
#define DBUS_ERROR_INIT
Expands to a suitable initializer for a DBusError on the stack.
Definition: dbus-errors.h:62
void * data
Data stored at this element.
Definition: dbus-list.h:38
DBusFreeFunction free_dispatch_status_data
free dispatch_status_data
DBusMessage * dbus_message_new(int message_type)
Constructs a new message of the given message type.
DBusFreeFunction free_user_data_function
Function to free the user data.
DBusList * incoming_messages
Queue of messages we have received, end of the list received most recently.
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:375
void _dbus_warn_check_failed(const char *format,...)
Prints a &quot;critical&quot; warning to stderr when an assertion fails; differs from _dbus_warn primarily in t...
dbus_bool_t _dbus_transport_get_unix_process_id(DBusTransport *transport, unsigned long *pid)
See dbus_connection_get_unix_process_id().
const char * dbus_message_get_signature(DBusMessage *message)
Gets the type signature of the message, i.e.
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&#39;s DBusWatchToggledFunction if appro...
Definition: dbus-watch.c:435
dbus_bool_t _dbus_transport_queue_messages(DBusTransport *transport)
Processes data we&#39;ve read while handling a watch, potentially converting some of it to messages and q...
Message has not had any effect - see if other handlers want it.
Definition: dbus-shared.h:69
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().
void dbus_message_iter_init_append(DBusMessage *message, DBusMessageIter *iter)
Initializes a DBusMessageIter for appending arguments to the end of a message.
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_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...
void dbus_error_free(DBusError *error)
Frees an error that&#39;s been set (or just initialized), then reinitializes the error as in dbus_error_i...
Definition: dbus-errors.c:211
void dbus_connection_set_route_peer_messages(DBusConnection *connection, dbus_bool_t value)
Normally DBusConnection automatically handles all messages to the org.freedesktop.DBus.Peer interface.
void _dbus_object_tree_unregister_and_unlock(DBusObjectTree *tree, const char **path)
Unregisters an object subtree that was registered with the same path.
#define DBUS_INTERFACE_PEER
The interface supported by most dbus peers.
Definition: dbus-shared.h:94
void _dbus_connection_close_if_only_one_ref(DBusConnection *connection)
Used internally to handle the semantics of dbus_server_set_new_connection_function().
#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:100
void dbus_connection_return_message(DBusConnection *connection, DBusMessage *message)
Used to return a message after peeking at it using dbus_connection_borrow_message().
DBusAtomic refcount
Reference count.
DBusCounter * _dbus_counter_ref(DBusCounter *counter)
Increments refcount of the counter.
void dbus_address_entries_free(DBusAddressEntry **entries)
Frees a NULL-terminated array of address entries.
Definition: dbus-address.c:189
dbus_bool_t _dbus_transport_get_windows_user(DBusTransport *transport, char **windows_sid_p)
See dbus_connection_get_windows_user().
Implementation details of DBusPendingCall - all fields are private.
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:70
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.
Implementation details of DBusConnection.
void(* DBusWakeupMainFunction)(void *data)
Called when the main loop&#39;s thread should be notified that there&#39;s now work to do.
void dbus_connection_remove_filter(DBusConnection *connection, DBusHandleMessageFunction function, void *user_data)
Removes a previously-added message filter.
struct DBusMutex DBusMutex
An opaque mutex type provided by the DBusThreadFunctions implementation installed by dbus_threads_ini...
Definition: dbus-threads.h:41
#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:91
DBusCounter * outgoing_counter
Counts size of outgoing messages.
#define DBUS_MESSAGE_TYPE_ERROR
Message type of an error reply message, see dbus_message_get_type()
DBusList * _dbus_list_alloc_link(void *data)
Allocates a linked list node.
Definition: dbus-list.c:231
dbus_bool_t dbus_connection_get_unix_user(DBusConnection *connection, unsigned long *uid)
Gets the UNIX user ID of the connection if known.
void(* DBusTimeoutToggleFunction)(DBusTimeoutList *list, DBusTimeout *timeout, dbus_bool_t enabled)
Function to be called in protected_change_timeout() with refcount held.
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.
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...
dbus_bool_t _dbus_string_init(DBusString *str)
Initializes a string.
Definition: dbus-string.c:175
dbus_bool_t _dbus_hash_table_remove_int(DBusHashTable *table, int key)
Removes the hash entry for the given key.
Definition: dbus-hash.c:1151
long _dbus_transport_get_max_message_size(DBusTransport *transport)
See dbus_connection_get_max_message_size().
dbus_bool_t _dbus_list_remove(DBusList **list, void *data)
Removes a value from the list.
Definition: dbus-list.c:404
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...
DBusDispatchStatusFunction dispatch_status_function
Function on dispatch status changes.
void(* DBusWatchRemoveFunction)(DBusWatchList *list, DBusWatch *watch)
Function to be called in protected_change_watch() with refcount held.
DBusHandlerResult
Results that a message handler can return.
Definition: dbus-shared.h:66
Hash keys are strings.
Definition: dbus-hash.h:69
dbus_bool_t _dbus_data_slot_allocator_alloc(DBusDataSlotAllocator *allocator, DBusRMutex **mutex_loc, dbus_int32_t *slot_id_p)
Allocates an integer ID to be used for storing data in a DBusDataSlotList.
Definition: dbus-dataslot.c:69
DBusMessage * _dbus_connection_get_message_to_send(DBusConnection *connection)
Gets the next outgoing message.
void _dbus_hash_table_unref(DBusHashTable *table)
Decrements the reference count for a hash table, freeing the hash table if the count reaches zero...
Definition: dbus-hash.c:361
DBusList * _dbus_list_pop_first_link(DBusList **list)
Removes the first link in the list and returns it.
Definition: dbus-list.c:617
Hash iterator object.
Definition: dbus-hash.h:49
DBusMessageIter struct; contains no public fields.
Definition: dbus-message.h:51
void dbus_connection_steal_borrowed_message(DBusConnection *connection, DBusMessage *message)
Used to keep a message after peeking at it using dbus_connection_borrow_message().
void * _dbus_list_get_first(DBusList **list)
Gets the first data in the list.
Definition: dbus-list.c:601
dbus_bool_t _dbus_pending_call_get_completed_unlocked(DBusPendingCall *pending)
Checks whether the pending call has received a reply yet, or not.
#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:90
void dbus_connection_free_data_slot(dbus_int32_t *slot_p)
Deallocates a global ID for connection data slots.
#define DBUS_ERROR_UNKNOWN_METHOD
Method name you invoked isn&#39;t known by the object you invoked it on.
const char * dbus_message_get_destination(DBusMessage *message)
Gets the destination of a message or NULL if there is none set.
Internal struct representing a message filter function.
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, and decremented by the size/unix fds of this message when this message if finalized.
Definition: dbus-message.c:279
#define DBUS_PATH_LOCAL
The object path used in local/in-process-generated messages.
Definition: dbus-shared.h:82
dbus_bool_t _dbus_list_copy(DBusList **list, DBusList **dest)
Copies a list.
Definition: dbus-list.c:686
void _dbus_connection_block_pending_call(DBusPendingCall *pending)
Blocks until a pending call times out or gets a reply.
dbus_bool_t _dbus_get_local_machine_uuid_encoded(DBusString *uuid_str)
Gets the hex-encoded UUID of the machine this function is executed on.
DBusWatchList * watches
Stores active watches.
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:1074
DBusRMutex * mutex
Lock on the entire DBusConnection.
dbus_bool_t _dbus_transport_get_is_connected(DBusTransport *transport)
Returns TRUE if the transport has not been disconnected.
dbus_bool_t dbus_message_set_error_name(DBusMessage *message, const char *error_name)
Sets the name of the error (DBUS_MESSAGE_TYPE_ERROR).
There is more data to potentially convert to messages.
void _dbus_get_monotonic_time(long *tv_sec, long *tv_usec)
Get current time, as in gettimeofday().
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.
DBusConnection * dbus_connection_open_private(const char *address, DBusError *error)
Opens a new, dedicated connection to a remote address.
dbus_int32_t _dbus_atomic_dec(DBusAtomic *atomic)
Atomically decrement an integer.
DBusAtomic refcount
Reference count.
const char * dbus_message_get_member(DBusMessage *message)
Gets the interface member being invoked (DBUS_MESSAGE_TYPE_METHOD_CALL) or emitted (DBUS_MESSAGE_TYPE...
DBusPreallocatedSend * dbus_connection_preallocate_send(DBusConnection *connection)
Preallocates resources needed to send a message, allowing the message to be sent without the possibil...
Virtual table that must be implemented to handle a portion of the object path hierarchy.
dbus_bool_t(* DBusAddWatchFunction)(DBusWatch *watch, void *data)
Called when libdbus needs a new watch to be monitored by the main loop.
Internals of DBusMessage.
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.
dbus_bool_t dbus_pending_call_get_completed(DBusPendingCall *pending)
Checks whether the pending call has received a reply yet, or not.
const char * dbus_address_entry_get_value(DBusAddressEntry *entry, const char *key)
Returns a value from a key of an entry.
Definition: dbus-address.c:244
long _dbus_transport_get_max_received_unix_fds(DBusTransport *transport)
See dbus_connection_set_max_received_unix_fds().
DBusHandlerResult(* DBusHandleMessageFunction)(DBusConnection *connection, DBusMessage *message, void *user_data)
Called when a message needs to be handled.
Hash keys are integers.
Definition: dbus-hash.h:70
void _dbus_rmutex_unlock(DBusRMutex *mutex)
Unlocks a mutex.
Definition: dbus-threads.c:197
#define DBUS_ERROR_OBJECT_PATH_IN_USE
There&#39;s already an object with the requested object path.
#define dbus_new0(type, count)
Safe macro for using dbus_malloc0().
Definition: dbus-memory.h:59
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:310
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().
void _dbus_connection_remove_watch_unlocked(DBusConnection *connection, DBusWatch *watch)
Removes a watch using the connection&#39;s DBusRemoveWatchFunction if available.
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_pending_call_is_timeout_added_unlocked(DBusPendingCall *pending)
Checks to see if a timeout has been added.
DBusHashTable * _dbus_hash_table_new(DBusHashType type, DBusFreeFunction key_free_function, DBusFreeFunction value_free_function)
Constructs a new hash table.
Definition: dbus-hash.c:285
void * dispatch_status_data
Application data for dispatch_status_function.
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE.
Definition: dbus-types.h:35
dbus_bool_t _dbus_connection_has_messages_to_send_unlocked(DBusConnection *connection)
Checks whether there are messages in the outgoing message queue.
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.
DBusTransport * transport
Object that sends/receives messages over network.
DBusDispatchStatus dbus_connection_dispatch(DBusConnection *connection)
Processes any incoming data.
dbus_bool_t dbus_connection_send(DBusConnection *connection, DBusMessage *message, dbus_uint32_t *serial)
Adds a message to the outgoing message queue.
DBusDispatchStatus dbus_connection_get_dispatch_status(DBusConnection *connection)
Gets the current state of the incoming message queue.
All currently available data has been processed.
void * dbus_connection_get_data(DBusConnection *connection, dbus_int32_t slot)
Retrieves data previously set with dbus_connection_set_data().
DBusTimeoutList * timeouts
Stores active timeouts.
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.
long dbus_connection_get_max_message_size(DBusConnection *connection)
Gets the value set by dbus_connection_set_max_message_size().
DBusHashTable * pending_replies
Hash of message serials to DBusPendingCall.
Internals of DBusObjectTree.
void _dbus_warn(const char *format,...)
Prints a warning message to stderr.
void _dbus_counter_unref(DBusCounter *counter)
Decrements refcount of the counter and possibly finalizes the counter.
dbus_bool_t(* DBusAddTimeoutFunction)(DBusTimeout *timeout, void *data)
Called when libdbus needs a new timeout to be monitored by the main loop.
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:351
dbus_bool_t _dbus_list_append(DBusList **list, void *data)
Appends a value to the list.
Definition: dbus-list.c:259
dbus_bool_t _dbus_decompose_path(const char *data, int len, char ***path, int *path_len)
Decompose an object path.
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_is_authenticated(DBusConnection *connection)
Gets whether the connection was authenticated.
void dbus_connection_close(DBusConnection *connection)
Closes a private connection, so no further data can be sent or received.
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.
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_transport_get_is_authenticated(DBusTransport *transport)
Returns TRUE if we have been authenticated.
dbus_bool_t io_path_acquired
Someone has transport io path (can use the transport to read/write messages)
void _dbus_list_foreach(DBusList **list, DBusForeachFunction function, void *data)
Calls the given function for each element in the list.
Definition: dbus-list.c:748
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:1111
Internals of DBusAddressEntry.
Definition: dbus-address.c:43
DBusList * outgoing_messages
Queue of messages we need to send, send the end of the list first.
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_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...
DBusObjectTree * objects
Object path handlers registered with this connection.
long dbus_connection_get_outgoing_unix_fds(DBusConnection *connection)
Gets the approximate number of uni fds of all messages in the outgoing message queue.
dbus_uint32_t client_serial
Client serial.
long dbus_connection_get_max_received_size(DBusConnection *connection)
Gets the value set by dbus_connection_set_max_received_size().
DBusCMutex * io_path_mutex
Protects io_path_acquired.
#define DBUS_MESSAGE_TYPE_METHOD_CALL
Message type of a method call message, see dbus_message_get_type()
DBusConnection * dbus_connection_open(const char *address, DBusError *error)
Gets a connection to a remote address.
void _dbus_connection_unref_unlocked(DBusConnection *connection)
Decrements the reference count of a DBusConnection.
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.
int _dbus_current_generation
_dbus_current_generation is used to track each time that dbus_shutdown() is called, so we can reinit things after it&#39;s been called.
Definition: dbus-memory.c:780
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 ...
Object representing an exception.
Definition: dbus-errors.h:48
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...
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:401
dbus_bool_t _dbus_hash_iter_next(DBusHashIter *iter)
Move the hash iterator forward one step, to the next hash entry.
Definition: dbus-hash.c:543
void _dbus_disable_sigpipe(void)
signal (SIGPIPE, SIG_IGN);
dbus_bool_t _dbus_transport_get_is_anonymous(DBusTransport *transport)
See dbus_connection_get_is_anonymous().
void * _dbus_list_pop_first(DBusList **list)
Removes the first value in the list and returns it.
Definition: dbus-list.c:638
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...
dbus_bool_t dbus_message_append_args(DBusMessage *message, int first_arg_type,...)
Appends fields to a message given a variable argument list.
#define DBUS_ERROR_UNKNOWN_OBJECT
Object you invoked a method on isn&#39;t known.
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:1214
dbus_bool_t dbus_connection_get_is_anonymous(DBusConnection *connection)
Gets whether the connection is not authenticated as a specific user.
#define DBUS_MESSAGE_TYPE_SIGNAL
Message type of a signal message, see dbus_message_get_type()
dbus_bool_t _dbus_connection_add_watch_unlocked(DBusConnection *connection, DBusWatch *watch)
Adds a watch using the connection&#39;s DBusAddWatchFunction if available.
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
dbus_uint32_t dbus_message_get_reply_serial(DBusMessage *message)
Returns the serial that the message is a reply to or 0 if none.
long dbus_connection_get_max_message_unix_fds(DBusConnection *connection)
Gets the value set by dbus_connection_set_max_message_unix_fds().
DBusWakeupMainFunction wakeup_main_function
Function to wake up the mainloop.
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...
dbus_int32_t _dbus_atomic_inc(DBusAtomic *atomic)
Atomically increments an integer.
void _dbus_cmutex_unlock(DBusCMutex *mutex)
Unlocks a mutex.
Definition: dbus-threads.c:209
DBusDataSlotList slot_list
Data stored by allocated integer ID.
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:1248
DBusPendingCall * dbus_pending_call_ref(DBusPendingCall *pending)
Increments the reference count on a pending call.
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_timeout_list_toggle_timeout(DBusTimeoutList *timeout_list, DBusTimeout *timeout, dbus_bool_t enabled)
Sets a timeout to the given enabled state, invoking the application&#39;s DBusTimeoutToggledFunction if a...
Definition: dbus-timeout.c:362
dbus_uint32_t _dbus_pending_call_get_reply_serial_unlocked(DBusPendingCall *pending)
Gets the reply&#39;s serial number.
void(* DBusWatchToggleFunction)(DBusWatchList *list, DBusWatch *watch, dbus_bool_t enabled)
Function to be called in protected_change_watch() with refcount held.
DBusTransport * _dbus_transport_open(DBusAddressEntry *entry, DBusError *error)
Try to open a new transport for the given address entry.
DBusConnection * _dbus_connection_new_for_transport(DBusTransport *transport)
Creates a new connection for the given transport.
#define _DBUS_UNLOCK(name)
Unlocks a global lock.
unsigned int disconnected_message_arrived
We popped or are dispatching the disconnected message.
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init().
Definition: dbus-string.c:242
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 ...
unsigned int disconnected_message_processed
We did our default handling of the disconnected message, such as closing the connection.
dbus_bool_t _dbus_transport_get_unix_user(DBusTransport *transport, unsigned long *uid)
See dbus_connection_get_unix_user().
void * _dbus_data_slot_list_get(DBusDataSlotAllocator *allocator, DBusDataSlotList *list, int slot)
Retrieves data previously set with _dbus_data_slot_list_set_data().
#define CONNECTION_UNLOCK(connection)
shorter and more visible way to write _dbus_connection_unlock()
unsigned int route_peer_messages
If TRUE, if org.freedesktop.DBus.Peer messages have a bus name, don&#39;t handle them automatically...
#define TRUE
Expands to &quot;1&quot;.
void _dbus_data_slot_list_init(DBusDataSlotList *list)
Initializes a slot list.
#define _dbus_assert_not_reached(explanation)
Aborts with an error message if called.
Data structure that stores the actual user data set at a given slot.
Definition: dbus-dataslot.h:67
DBusCondVar * io_path_cond
Notify when io_path_acquired is available.
dbus_bool_t dbus_message_is_method_call(DBusMessage *message, const char *interface, const char *method)
Checks whether the message is a method call with the given interface and member fields.
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:1123
void _dbus_condvar_new_at_location(DBusCondVar **location_p)
This does the same thing as _dbus_condvar_new.
Definition: dbus-threads.c:244
DBusDispatchStatus last_dispatch_status
The last dispatch status we reported to the application.
unsigned int exit_on_disconnect
If TRUE, exit after handling disconnect signal.
dbus_bool_t _dbus_transport_set_connection(DBusTransport *transport, DBusConnection *connection)
Sets the connection using this transport.
#define DBUS_ERROR_FAILED
A generic error; &quot;something went wrong&quot; - see the error message for more.
void _dbus_list_free_link(DBusList *link)
Frees a linked list node allocated with _dbus_list_alloc_link.
Definition: dbus-list.c:243
void dbus_move_error(DBusError *src, DBusError *dest)
Moves an error src into dest, freeing src and overwriting dest.
Definition: dbus-errors.c:279
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...
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.
dbus_bool_t dbus_set_error_from_message(DBusError *error, DBusMessage *message)
Sets a DBusError based on the contents of the given message.
void(* DBusTimeoutRemoveFunction)(DBusTimeoutList *list, DBusTimeout *timeout)
Function to be called in protected_change_timeout() with refcount held.
void _dbus_condvar_wake_one(DBusCondVar *cond)
If there are threads waiting on the condition variable, wake up exactly one.
Definition: dbus-threads.c:340
#define DBUS_TYPE_UNIX_FD
Type code marking a unix file descriptor.
void dbus_pending_call_unref(DBusPendingCall *pending)
Decrements the reference count on a pending call, freeing it if the count reaches 0...
Object representing a transport such as a socket.
DBusMessage * dbus_message_new_signal(const char *path, const char *interface, const char *name)
Constructs a new message representing a signal emission.
DBusWatchList implementation details.
Definition: dbus-watch.c:214
#define _DBUS_DEFINE_GLOBAL_LOCK(name)
Defines a global lock variable with the given name.
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...
int n_incoming
Length of incoming queue.
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.
void _dbus_hash_iter_remove_entry(DBusHashIter *iter)
Removes the current entry from the hash table.
Definition: dbus-hash.c:592
DBusMessage * dbus_connection_pop_message(DBusConnection *connection)
Returns the first-received message from the incoming message queue, removing it from the queue...
An allocator that tracks a set of slot IDs.
Definition: dbus-dataslot.h:55
#define DBUS_TYPE_INVALID
Type code that is never equal to a legitimate type code.
Definition: dbus-protocol.h:60
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).
void _dbus_pending_call_queue_timeout_error_unlocked(DBusPendingCall *pending, DBusConnection *connection)
If the pending call hasn&#39;t been timed out, add its timeout error reply to the connection&#39;s incoming m...
Internals of DBusPreallocatedSend.
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_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...
DBusList * counter_link
Preallocated link in the resource counter.
DBusObjectTree * _dbus_object_tree_new(DBusConnection *connection)
Creates a new object tree, representing a mapping from paths to handler vtables.
void dbus_pending_call_block(DBusPendingCall *pending)
Block until the pending call is completed.
void _dbus_timeout_list_remove_timeout(DBusTimeoutList *timeout_list, DBusTimeout *timeout)
Removes a timeout from the timeout list, invoking the application&#39;s DBusRemoveTimeoutFunction if appr...
Definition: dbus-timeout.c:340
int n_outgoing
Length of outgoing queue.
DBusCMutex * dispatch_mutex
Protects dispatch_acquired.
DBusPendingCall * _dbus_pending_call_new_unlocked(DBusConnection *connection, int timeout_milliseconds, DBusTimeoutHandler timeout_handler)
Creates a new pending reply object.
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:277
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, by timing out the pending call.
void _dbus_exit(int code)
Exit the process, returning the given value.
A node in a linked list.
Definition: dbus-list.h:34
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 _dbus_list_unlink(DBusList **list, DBusList *link)
Removes the given link from the list, but doesn&#39;t free it.
Definition: dbus-list.c:488
void dbus_free_string_array(char **str_array)
Frees a NULL-terminated array of strings.
Definition: dbus-memory.c:748
DBusTransport * _dbus_transport_ref(DBusTransport *transport)
Increments the reference count for the transport.
DBusCondVar * dispatch_cond
Notify when dispatch_acquired is available.
void _dbus_connection_remove_timeout_unlocked(DBusConnection *connection, DBusTimeout *timeout)
Removes a timeout using the connection&#39;s DBusRemoveTimeoutFunction if available.
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.
void _dbus_rmutex_free_at_location(DBusRMutex **location_p)
Frees a DBusRMutex or removes it from the uninitialized mutex list; does nothing if passed a NULL poi...
Definition: dbus-threads.c:125
void _dbus_transport_do_iteration(DBusTransport *transport, unsigned int flags, int timeout_milliseconds)
Performs a single poll()/select() on the transport&#39;s file descriptors and then reads/writes data as a...
long _dbus_transport_get_max_received_size(DBusTransport *transport)
See dbus_connection_get_max_received_size().
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.
long _dbus_transport_get_max_message_unix_fds(DBusTransport *transport)
See dbus_connection_get_max_message_unix_fds().
dbus_bool_t dbus_message_is_signal(DBusMessage *message, const char *interface, const char *signal_name)
Checks whether the message is a signal with the given interface and member fields.
#define DBUS_ERROR_DISCONNECTED
The connection is disconnected and you&#39;re trying to use it.
DBusCounter * _dbus_counter_new(void)
Creates a new DBusCounter.
void _dbus_cmutex_lock(DBusCMutex *mutex)
Locks a mutex.
Definition: dbus-threads.c:185
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...
void _dbus_transport_set_allow_anonymous(DBusTransport *transport, dbus_bool_t value)
See dbus_connection_set_allow_anonymous()
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...
DBusHandleMessageFunction function
Function to call to filter.
void _dbus_hash_iter_init(DBusHashTable *table, DBusHashIter *iter)
Initializes a hash table iterator.
Definition: dbus-hash.c:517
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...
void * _dbus_hash_iter_get_value(DBusHashIter *iter)
Gets the value of the current entry.
Definition: dbus-hash.c:613
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.
dbus_bool_t dbus_message_iter_append_basic(DBusMessageIter *iter, int type, const void *value)
Appends a basic-typed value to the message.
void _dbus_transport_set_max_received_size(DBusTransport *transport, long size)
See dbus_connection_set_max_received_size().
void(* DBusForeachFunction)(void *element, void *data)
Used to iterate over each item in a collection, such as a DBusList.
DBusList * expired_messages
Messages that will be released when we next unlock.
DBusList * _dbus_list_get_first_link(DBusList **list)
Gets the first link in the list.
Definition: dbus-list.c:556
#define FALSE
Expands to &quot;0&quot;.
int dbus_message_get_type(DBusMessage *message)
Gets the type of a message.
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 dbus_connection_get_unix_fd(DBusConnection *connection, int *fd)
Get the UNIX file descriptor of the connection, if any.
void _dbus_list_prepend_link(DBusList **list, DBusList *link)
Prepends a link to the list.
Definition: dbus-list.c:322
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:809
#define _DBUS_LOCK(name)
Locks a global lock.
dbus_bool_t dbus_parse_address(const char *address, DBusAddressEntry ***entry, int *array_len, DBusError *error)
Parses an address string of the form:
Definition: dbus-address.c:363
#define _DBUS_LOCK_NAME(name)
Expands to name of a global lock variable.
dbus_bool_t _dbus_transport_can_pass_unix_fd(DBusTransport *transport)
Returns TRUE if the transport supports sending unix fds.
void _dbus_cmutex_free_at_location(DBusCMutex **location_p)
Frees a DBusCMutex and removes it from the uninitialized mutex list; does nothing if passed a NULL po...
Definition: dbus-threads.c:149
void(* DBusWatchToggledFunction)(DBusWatch *watch, void *data)
Called when dbus_watch_get_enabled() may return a different value than it did before.
char * server_guid
GUID of server if we are in shared_connections, NULL if server GUID is unknown or connection is priva...
dbus_bool_t dbus_connection_get_is_connected(DBusConnection *connection)
Gets whether the connection is currently open.
void dbus_connection_send_preallocated(DBusConnection *connection, DBusPreallocatedSend *preallocated, DBusMessage *message, dbus_uint32_t *client_serial)
Sends a message using preallocated resources.
void dbus_connection_unref(DBusConnection *connection)
Decrements the reference count of a DBusConnection, and finalizes it if the count reaches zero...
Internals of DBusHashTable.
Definition: dbus-hash.c:168
void _dbus_object_tree_unref(DBusObjectTree *tree)
Decrement the reference count.
void _dbus_watch_list_free(DBusWatchList *watch_list)
Frees a DBusWatchList.
Definition: dbus-watch.c:249
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...
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_transport_get_socket_fd(DBusTransport *transport, int *fd_p)
Get the socket file descriptor, if any.
DBusConnection * _dbus_connection_ref_unlocked(DBusConnection *connection)
Increments the reference count of a DBusConnection.
Message has had its effect - no need to run more handlers.
Definition: dbus-shared.h:68
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 ...
int dbus_int32_t
A 32-bit signed integer on all platforms.
char * _dbus_strdup(const char *str)
Duplicates a string.
#define CONNECTION_LOCK(connection)
Internals of DBusPendingCall.
dbus_bool_t dispatch_acquired
Someone has dispatch path (can drain incoming queue)
void _dbus_transport_disconnect(DBusTransport *transport)
Closes our end of the connection to a remote application.
DBusTimeout * _dbus_pending_call_get_timeout_unlocked(DBusPendingCall *pending)
Retrives the timeout.
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().
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_unregister_object_path(DBusConnection *connection, const char *path)
Unregisters the handler registered with exactly the given path.
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:1049
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_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(* DBusRemoveTimeoutFunction)(DBusTimeout *timeout, void *data)
Called when libdbus no longer needs a timeout to be monitored by the main loop.
void _dbus_connection_unlock(DBusConnection *connection)
Releases the connection lock.
const char * _dbus_string_get_const_data(const DBusString *str)
Gets the raw character buffer from a const string.
Definition: dbus-string.c:446
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_transport_set_max_message_size(DBusTransport *transport, long size)
See dbus_connection_set_max_message_size().
void dbus_message_unref(DBusMessage *message)
Decrements the reference count of a DBusMessage, freeing the message if the count reaches 0...
void * wakeup_main_data
Application data for wakeup_main_function.
Need more memory in order to return DBUS_HANDLER_RESULT_HANDLED or DBUS_HANDLER_RESULT_NOT_YET_HANDLE...
Definition: dbus-shared.h:70
void dbus_connection_flush(DBusConnection *connection)
Blocks until the outgoing message queue is empty.
void _dbus_condvar_free_at_location(DBusCondVar **location_p)
Frees a conditional variable and removes it from the uninitialized_condvar_list; does nothing if pass...
Definition: dbus-threads.c:279
dbus_bool_t dbus_connection_has_messages_to_send(DBusConnection *connection)
Checks whether there are messages in the outgoing message queue.
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:103
void _dbus_sleep_milliseconds(int milliseconds)
Sleeps the given number of milliseconds.
void _dbus_pending_call_unref_and_unlock(DBusPendingCall *pending)
Decrements the reference count on a pending call, freeing it if the count reaches 0...
DBusDispatchStatus _dbus_transport_get_dispatch_status(DBusTransport *transport)
Reports our current dispatch status (whether there&#39;s buffered data to be queued as messages...
void _dbus_pending_call_set_timeout_added_unlocked(DBusPendingCall *pending, dbus_bool_t is_added)
Sets wether the timeout has been added.
DBusConnection * connection
Connection we&#39;d send the message to.
DBusConnection * _dbus_pending_call_get_connection_and_lock(DBusPendingCall *pending)
Gets the connection associated with this pending call.
void _dbus_connection_toggle_timeout_unlocked(DBusConnection *connection, DBusTimeout *timeout, dbus_bool_t enabled)
Toggles a timeout and notifies app via connection&#39;s DBusTimeoutToggledFunction if available...
dbus_bool_t dbus_type_is_valid(int typecode)
Return TRUE if the argument is a valid typecode.
void _dbus_transport_set_max_message_unix_fds(DBusTransport *transport, long n)
See dbus_connection_set_max_message_unix_fds().
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_get_socket(DBusConnection *connection, int *fd)
Gets the underlying Windows or UNIX socket file descriptor of the connection, if any.
void dbus_connection_free_preallocated_send(DBusConnection *connection, DBusPreallocatedSend *preallocated)
Frees preallocated message-sending resources from dbus_connection_preallocate_send().
void dbus_message_set_serial(DBusMessage *message, dbus_uint32_t serial)
Sets the serial number of a message.
Definition: dbus-message.c:253
DBusTimeoutList implementation details.
Definition: dbus-timeout.c:176
DBusMessage * dbus_message_new_method_return(DBusMessage *method_call)
Constructs a message that is a reply to a method call.
DBusRMutex * slot_mutex
Lock on slot_list so overall connection lock need not be taken.
void _dbus_transport_unref(DBusTransport *transport)
Decrements the reference count for the transport.
int generation
_dbus_current_generation that should correspond to this connection
void _dbus_watch_list_remove_watch(DBusWatchList *watch_list, DBusWatch *watch)
Removes a watch from the watch list, invoking the application&#39;s DBusRemoveWatchFunction if appropriat...
Definition: dbus-watch.c:408
long _dbus_counter_get_unix_fd_value(DBusCounter *counter)
Gets the current value of the unix fd counter.
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_list_clear(DBusList **list)
Frees all links in the list and sets the list head to NULL.
Definition: dbus-list.c:531
dbus_bool_t(* DBusTimeoutAddFunction)(DBusTimeoutList *list, DBusTimeout *timeout)
Function to be called in protected_change_timeout() with refcount held.
DBUS_EXPORT int dbus_timeout_get_interval(DBusTimeout *timeout)
Gets the timeout interval.
Definition: dbus-timeout.c:416
dbus_bool_t dbus_connection_read_write_dispatch(DBusConnection *connection, int timeout_milliseconds)
This function is intended for use with applications that don&#39;t want to write a main loop and deal wit...
long _dbus_counter_get_size_value(DBusCounter *counter)
Gets the current value of the size counter.
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.