1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* connection.c Client connections
4 * Copyright (C) 2003 Red Hat, Inc.
6 * Licensed under the Academic Free License version 2.1
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.
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.
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
25 #include "connection.h"
31 #include "expirelist.h"
33 #include <dbus/dbus-list.h>
34 #include <dbus/dbus-hash.h>
35 #include <dbus/dbus-timeout.h>
37 /* Trim executed commands to this length; we want to keep logs readable */
38 #define MAX_LOG_COMMAND_LEN 50
40 static void bus_connection_remove_transactions (DBusConnection *connection);
44 BusExpireItem expire_item;
46 DBusConnection *will_get_reply;
47 DBusConnection *will_send_reply;
49 dbus_uint32_t reply_serial;
56 DBusList *completed; /**< List of all completed connections */
57 int n_completed; /**< Length of completed list */
58 DBusList *incomplete; /**< List of all not-yet-active connections */
59 int n_incomplete; /**< Length of incomplete list */
61 DBusHashTable *completed_by_user; /**< Number of completed connections for each UID */
62 DBusTimeout *expire_timeout; /**< Timeout for expiring incomplete connections. */
63 int stamp; /**< Incrementing number */
64 BusExpireList *pending_replies; /**< List of pending replies */
66 #ifdef DBUS_ENABLE_STATS
67 int total_match_rules;
69 int peak_match_rules_per_conn;
73 int peak_bus_names_per_conn;
77 static dbus_int32_t connection_data_slot = -1;
81 BusConnections *connections;
82 DBusList *link_in_connection_list;
83 DBusConnection *connection;
84 DBusList *services_owned;
86 DBusList *match_rules;
89 DBusList *transaction_messages; /**< Stuff we need to send as part of a transaction */
90 DBusMessage *oom_message;
91 DBusPreallocatedSend *oom_preallocated;
92 BusClientPolicy *policy;
94 char *cached_loginfo_string;
95 BusSELinuxID *selinux_id;
97 long connection_tv_sec; /**< Time when we connected (seconds component) */
98 long connection_tv_usec; /**< Time when we connected (microsec component) */
99 int stamp; /**< connections->stamp last time we were traversed */
101 #ifdef DBUS_ENABLE_STATS
102 int peak_match_rules;
107 static dbus_bool_t bus_pending_reply_expired (BusExpireList *list,
111 static void bus_connection_drop_pending_replies (BusConnections *connections,
112 DBusConnection *connection);
114 static dbus_bool_t expire_incomplete_timeout (void *data);
116 #define BUS_CONNECTION_DATA(connection) (dbus_connection_get_data ((connection), connection_data_slot))
119 connection_get_loop (DBusConnection *connection)
121 BusConnectionData *d;
123 d = BUS_CONNECTION_DATA (connection);
125 return bus_context_get_loop (d->connections->context);
130 get_connections_for_uid (BusConnections *connections,
136 /* val is NULL is 0 when it isn't in the hash yet */
138 val = _dbus_hash_table_lookup_uintptr (connections->completed_by_user,
141 current_count = _DBUS_POINTER_TO_INT (val);
143 return current_count;
147 adjust_connections_for_uid (BusConnections *connections,
153 current_count = get_connections_for_uid (connections, uid);
155 _dbus_verbose ("Adjusting connection count for UID " DBUS_UID_FORMAT
156 ": was %d adjustment %d making %d\n",
157 uid, current_count, adjustment, current_count + adjustment);
159 _dbus_assert (current_count >= 0);
161 current_count += adjustment;
163 _dbus_assert (current_count >= 0);
165 if (current_count == 0)
167 _dbus_hash_table_remove_uintptr (connections->completed_by_user, uid);
174 retval = _dbus_hash_table_insert_uintptr (connections->completed_by_user,
175 uid, _DBUS_INT_TO_POINTER (current_count));
177 /* only positive adjustment can fail as otherwise
178 * a hash entry should already exist
180 _dbus_assert (adjustment > 0 ||
181 (adjustment <= 0 && retval));
188 bus_connection_disconnected (DBusConnection *connection)
190 BusConnectionData *d;
192 BusMatchmaker *matchmaker;
194 d = BUS_CONNECTION_DATA (connection);
195 _dbus_assert (d != NULL);
197 _dbus_verbose ("%s disconnected, dropping all service ownership and releasing\n",
198 d->name ? d->name : "(inactive)");
200 /* Delete our match rules */
201 if (d->n_match_rules > 0)
203 matchmaker = bus_context_get_matchmaker (d->connections->context);
204 bus_matchmaker_disconnected (matchmaker, connection);
207 /* Drop any service ownership. Unfortunately, this requires
208 * memory allocation and there doesn't seem to be a good way to
209 * handle it other than sleeping; we can't "fail" the operation of
210 * disconnecting a client, and preallocating a broadcast "service is
211 * now gone" message for every client-service pair seems kind of
214 while ((service = _dbus_list_get_last (&d->services_owned)))
216 BusTransaction *transaction;
221 dbus_error_init (&error);
223 while ((transaction = bus_transaction_new (d->connections->context)) == NULL)
224 _dbus_wait_for_memory ();
226 if (!bus_service_remove_owner (service, connection,
227 transaction, &error))
229 _DBUS_ASSERT_ERROR_IS_SET (&error);
231 if (dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY))
233 dbus_error_free (&error);
234 bus_transaction_cancel_and_free (transaction);
235 _dbus_wait_for_memory ();
240 _dbus_verbose ("Failed to remove service owner: %s %s\n",
241 error.name, error.message);
242 _dbus_assert_not_reached ("Removing service owner failed for non-memory-related reason");
246 bus_transaction_execute_and_free (transaction);
249 bus_dispatch_remove_connection (connection);
251 /* no more watching */
252 if (!dbus_connection_set_watch_functions (connection,
256 _dbus_assert_not_reached ("setting watch functions to NULL failed");
258 if (!dbus_connection_set_timeout_functions (connection,
262 _dbus_assert_not_reached ("setting timeout functions to NULL failed");
264 dbus_connection_set_unix_user_function (connection,
266 dbus_connection_set_windows_user_function (connection,
269 dbus_connection_set_dispatch_status_function (connection,
272 bus_connection_remove_transactions (connection);
274 if (d->link_in_connection_list != NULL)
280 _dbus_list_remove_link (&d->connections->completed, d->link_in_connection_list);
281 d->link_in_connection_list = NULL;
282 d->connections->n_completed -= 1;
284 if (dbus_connection_get_unix_user (connection, &uid))
286 if (!adjust_connections_for_uid (d->connections,
288 _dbus_assert_not_reached ("adjusting downward should never fail");
293 _dbus_list_remove_link (&d->connections->incomplete, d->link_in_connection_list);
294 d->link_in_connection_list = NULL;
295 d->connections->n_incomplete -= 1;
298 _dbus_assert (d->connections->n_incomplete >= 0);
299 _dbus_assert (d->connections->n_completed >= 0);
302 bus_connection_drop_pending_replies (d->connections, connection);
304 /* frees "d" as side effect */
305 dbus_connection_set_data (connection,
306 connection_data_slot,
309 dbus_connection_unref (connection);
313 add_connection_watch (DBusWatch *watch,
316 DBusConnection *connection = data;
318 return _dbus_loop_add_watch (connection_get_loop (connection), watch);
322 remove_connection_watch (DBusWatch *watch,
325 DBusConnection *connection = data;
327 _dbus_loop_remove_watch (connection_get_loop (connection), watch);
331 add_connection_timeout (DBusTimeout *timeout,
334 DBusConnection *connection = data;
336 return _dbus_loop_add_timeout (connection_get_loop (connection), timeout);
340 remove_connection_timeout (DBusTimeout *timeout,
343 DBusConnection *connection = data;
345 _dbus_loop_remove_timeout (connection_get_loop (connection), timeout);
349 dispatch_status_function (DBusConnection *connection,
350 DBusDispatchStatus new_status,
353 DBusLoop *loop = data;
355 if (new_status != DBUS_DISPATCH_COMPLETE)
357 while (!_dbus_loop_queue_dispatch (loop, connection))
358 _dbus_wait_for_memory ();
363 allow_unix_user_function (DBusConnection *connection,
367 BusConnectionData *d;
369 d = BUS_CONNECTION_DATA (connection);
371 _dbus_assert (d != NULL);
373 return bus_context_allow_unix_user (d->connections->context, uid);
377 free_connection_data (void *data)
379 BusConnectionData *d = data;
381 /* services_owned should be NULL since we should be disconnected */
382 _dbus_assert (d->services_owned == NULL);
383 _dbus_assert (d->n_services_owned == 0);
385 _dbus_assert (d->transaction_messages == NULL);
387 if (d->oom_preallocated)
388 dbus_connection_free_preallocated_send (d->connection, d->oom_preallocated);
391 dbus_message_unref (d->oom_message);
394 bus_client_policy_unref (d->policy);
397 bus_selinux_id_unref (d->selinux_id);
399 dbus_free (d->cached_loginfo_string);
407 call_timeout_callback (DBusTimeout *timeout,
410 /* can return FALSE on OOM but we just let it fire again later */
411 dbus_timeout_handle (timeout);
415 bus_connections_new (BusContext *context)
417 BusConnections *connections;
419 if (!dbus_connection_allocate_data_slot (&connection_data_slot))
422 connections = dbus_new0 (BusConnections, 1);
423 if (connections == NULL)
426 connections->completed_by_user = _dbus_hash_table_new (DBUS_HASH_UINTPTR,
428 if (connections->completed_by_user == NULL)
431 connections->expire_timeout = _dbus_timeout_new (100, /* irrelevant */
432 expire_incomplete_timeout,
434 if (connections->expire_timeout == NULL)
437 _dbus_timeout_set_enabled (connections->expire_timeout, FALSE);
439 connections->pending_replies = bus_expire_list_new (bus_context_get_loop (context),
440 bus_context_get_reply_timeout (context),
441 bus_pending_reply_expired,
443 if (connections->pending_replies == NULL)
446 if (!_dbus_loop_add_timeout (bus_context_get_loop (context),
447 connections->expire_timeout))
450 connections->refcount = 1;
451 connections->context = context;
456 bus_expire_list_free (connections->pending_replies);
458 _dbus_timeout_unref (connections->expire_timeout);
460 _dbus_hash_table_unref (connections->completed_by_user);
462 dbus_free (connections);
464 dbus_connection_free_data_slot (&connection_data_slot);
470 bus_connections_ref (BusConnections *connections)
472 _dbus_assert (connections->refcount > 0);
473 connections->refcount += 1;
479 bus_connections_unref (BusConnections *connections)
481 _dbus_assert (connections->refcount > 0);
482 connections->refcount -= 1;
483 if (connections->refcount == 0)
485 /* drop all incomplete */
486 while (connections->incomplete != NULL)
488 DBusConnection *connection;
490 connection = connections->incomplete->data;
492 dbus_connection_ref (connection);
493 dbus_connection_close (connection);
494 bus_connection_disconnected (connection);
495 dbus_connection_unref (connection);
498 _dbus_assert (connections->n_incomplete == 0);
500 /* drop all real connections */
501 while (connections->completed != NULL)
503 DBusConnection *connection;
505 connection = connections->completed->data;
507 dbus_connection_ref (connection);
508 dbus_connection_close (connection);
509 bus_connection_disconnected (connection);
510 dbus_connection_unref (connection);
513 _dbus_assert (connections->n_completed == 0);
515 bus_expire_list_free (connections->pending_replies);
517 _dbus_loop_remove_timeout (bus_context_get_loop (connections->context),
518 connections->expire_timeout);
520 _dbus_timeout_unref (connections->expire_timeout);
522 _dbus_hash_table_unref (connections->completed_by_user);
524 dbus_free (connections);
526 dbus_connection_free_data_slot (&connection_data_slot);
530 /* Used for logging */
532 cache_peer_loginfo_string (BusConnectionData *d,
533 DBusConnection *connection)
535 DBusString loginfo_buf;
539 dbus_bool_t prev_added;
541 if (!_dbus_string_init (&loginfo_buf))
545 if (dbus_connection_get_unix_user (connection, &uid))
547 if (!_dbus_string_append_printf (&loginfo_buf, "uid=%ld", uid))
553 if (dbus_connection_get_unix_process_id (connection, &pid))
557 if (!_dbus_string_append_byte (&loginfo_buf, ' '))
560 if (!_dbus_string_append_printf (&loginfo_buf, "pid=%ld comm=\"", pid))
562 /* Ignore errors here; we may not have permissions to read the
564 _dbus_command_for_pid (pid, &loginfo_buf, MAX_LOG_COMMAND_LEN, NULL);
565 if (!_dbus_string_append_byte (&loginfo_buf, '"'))
569 if (dbus_connection_get_windows_user (connection, &windows_sid))
571 dbus_bool_t did_append;
572 did_append = _dbus_string_append_printf (&loginfo_buf,
573 "sid=\"%s\" ", windows_sid);
574 dbus_free (windows_sid);
579 if (!_dbus_string_steal_data (&loginfo_buf, &(d->cached_loginfo_string)))
582 _dbus_string_free (&loginfo_buf);
586 _dbus_string_free (&loginfo_buf);
591 bus_connections_setup_connection (BusConnections *connections,
592 DBusConnection *connection)
595 BusConnectionData *d;
600 d = dbus_new0 (BusConnectionData, 1);
605 d->connections = connections;
606 d->connection = connection;
608 _dbus_get_current_time (&d->connection_tv_sec,
609 &d->connection_tv_usec);
611 _dbus_assert (connection_data_slot >= 0);
613 if (!dbus_connection_set_data (connection,
614 connection_data_slot,
615 d, free_connection_data))
621 dbus_connection_set_route_peer_messages (connection, TRUE);
625 dbus_error_init (&error);
626 d->selinux_id = bus_selinux_init_connection_id (connection,
628 if (dbus_error_is_set (&error))
630 /* This is a bit bogus because we pretend all errors
631 * are OOM; this is done because we know that in bus.c
632 * an OOM error disconnects the connection, which is
633 * the same thing we want on any other error.
635 dbus_error_free (&error);
639 if (!dbus_connection_set_watch_functions (connection,
640 add_connection_watch,
641 remove_connection_watch,
647 if (!dbus_connection_set_timeout_functions (connection,
648 add_connection_timeout,
649 remove_connection_timeout,
654 /* For now we don't need to set a Windows user function because
655 * there are no policies in the config file controlling what
656 * Windows users can connect. The default 'same user that owns the
657 * bus can connect' behavior of DBusConnection is fine on Windows.
659 dbus_connection_set_unix_user_function (connection,
660 allow_unix_user_function,
663 dbus_connection_set_dispatch_status_function (connection,
664 dispatch_status_function,
665 bus_context_get_loop (connections->context),
668 d->link_in_connection_list = _dbus_list_alloc_link (connection);
669 if (d->link_in_connection_list == NULL)
672 /* Setup the connection with the dispatcher */
673 if (!bus_dispatch_add_connection (connection))
676 if (dbus_connection_get_dispatch_status (connection) != DBUS_DISPATCH_COMPLETE)
678 if (!_dbus_loop_queue_dispatch (bus_context_get_loop (connections->context), connection))
680 bus_dispatch_remove_connection (connection);
685 _dbus_list_append_link (&connections->incomplete, d->link_in_connection_list);
686 connections->n_incomplete += 1;
688 dbus_connection_ref (connection);
690 /* Note that we might disconnect ourselves here, but it only takes
691 * effect on return to the main loop. We call this to free up
692 * expired connections if possible, and to queue the timeout for our
695 bus_connections_expire_incomplete (connections);
697 /* And we might also disconnect ourselves here, but again it
698 * only takes effect on return to main loop.
700 if (connections->n_incomplete >
701 bus_context_get_max_incomplete_connections (connections->context))
703 _dbus_verbose ("Number of incomplete connections exceeds max, dropping oldest one\n");
705 _dbus_assert (connections->incomplete != NULL);
706 /* Disconnect the oldest unauthenticated connection. FIXME
707 * would it be more secure to drop a *random* connection? This
708 * algorithm seems to mean that if someone can create new
709 * connections quickly enough, they can keep anyone else from
710 * completing authentication. But random may or may not really
711 * help with that, a more elaborate solution might be required.
713 dbus_connection_close (connections->incomplete->data);
722 bus_selinux_id_unref (d->selinux_id);
723 d->selinux_id = NULL;
725 if (!dbus_connection_set_watch_functions (connection,
729 _dbus_assert_not_reached ("setting watch functions to NULL failed");
731 if (!dbus_connection_set_timeout_functions (connection,
735 _dbus_assert_not_reached ("setting timeout functions to NULL failed");
737 dbus_connection_set_unix_user_function (connection,
740 dbus_connection_set_windows_user_function (connection,
743 dbus_connection_set_dispatch_status_function (connection,
746 if (d->link_in_connection_list != NULL)
748 _dbus_assert (d->link_in_connection_list->next == NULL);
749 _dbus_assert (d->link_in_connection_list->prev == NULL);
750 _dbus_list_free_link (d->link_in_connection_list);
751 d->link_in_connection_list = NULL;
754 if (!dbus_connection_set_data (connection,
755 connection_data_slot,
757 _dbus_assert_not_reached ("failed to set connection data to null");
759 /* "d" has now been freed */
766 bus_connections_expire_incomplete (BusConnections *connections)
772 if (connections->incomplete != NULL)
774 long tv_sec, tv_usec;
778 _dbus_get_current_time (&tv_sec, &tv_usec);
779 auth_timeout = bus_context_get_auth_timeout (connections->context);
781 link = _dbus_list_get_first_link (&connections->incomplete);
784 DBusList *next = _dbus_list_get_next_link (&connections->incomplete, link);
785 DBusConnection *connection;
786 BusConnectionData *d;
789 connection = link->data;
791 d = BUS_CONNECTION_DATA (connection);
793 _dbus_assert (d != NULL);
795 elapsed = ELAPSED_MILLISECONDS_SINCE (d->connection_tv_sec,
796 d->connection_tv_usec,
799 if (elapsed >= (double) auth_timeout)
801 _dbus_verbose ("Timing out authentication for connection %p\n", connection);
802 dbus_connection_close (connection);
806 /* We can end the loop, since the connections are in oldest-first order */
807 next_interval = ((double)auth_timeout) - elapsed;
808 _dbus_verbose ("Connection %p authentication expires in %d milliseconds\n",
809 connection, next_interval);
818 bus_expire_timeout_set_interval (connections->expire_timeout,
823 expire_incomplete_timeout (void *data)
825 BusConnections *connections = data;
827 _dbus_verbose ("Running\n");
829 /* note that this may remove the timeout */
830 bus_connections_expire_incomplete (connections);
836 bus_connection_get_unix_groups (DBusConnection *connection,
837 unsigned long **groups,
841 BusConnectionData *d;
844 d = BUS_CONNECTION_DATA (connection);
846 _dbus_assert (d != NULL);
851 if (dbus_connection_get_unix_user (connection, &uid))
853 if (!_dbus_unix_groups_from_uid (uid, groups, n_groups))
855 _dbus_verbose ("Did not get any groups for UID %lu\n",
861 _dbus_verbose ("Got %d groups for UID %lu\n",
867 return TRUE; /* successfully got 0 groups */
871 bus_connection_is_in_unix_group (DBusConnection *connection,
875 unsigned long *group_ids;
878 if (!bus_connection_get_unix_groups (connection, &group_ids, &n_group_ids,
883 while (i < n_group_ids)
885 if (group_ids[i] == gid)
887 dbus_free (group_ids);
893 dbus_free (group_ids);
898 bus_connection_get_loginfo (DBusConnection *connection)
900 BusConnectionData *d;
902 d = BUS_CONNECTION_DATA (connection);
904 if (!bus_connection_is_active (connection))
906 return d->cached_loginfo_string;
910 bus_connection_get_policy (DBusConnection *connection)
912 BusConnectionData *d;
914 d = BUS_CONNECTION_DATA (connection);
916 _dbus_assert (d != NULL);
917 _dbus_assert (d->policy != NULL);
923 foreach_active (BusConnections *connections,
924 BusConnectionForeachFunction function,
929 link = _dbus_list_get_first_link (&connections->completed);
932 DBusConnection *connection = link->data;
933 DBusList *next = _dbus_list_get_next_link (&connections->completed, link);
935 if (!(* function) (connection, data))
945 foreach_inactive (BusConnections *connections,
946 BusConnectionForeachFunction function,
951 link = _dbus_list_get_first_link (&connections->incomplete);
954 DBusConnection *connection = link->data;
955 DBusList *next = _dbus_list_get_next_link (&connections->incomplete, link);
957 if (!(* function) (connection, data))
967 * Calls function on each active connection; if the function returns
968 * #FALSE, stops iterating. Active connections are authenticated
969 * and have sent a Hello message.
971 * @param connections the connections object
972 * @param function the function
973 * @param data data to pass to it as a second arg
976 bus_connections_foreach_active (BusConnections *connections,
977 BusConnectionForeachFunction function,
980 foreach_active (connections, function, data);
984 * Calls function on each connection; if the function returns
985 * #FALSE, stops iterating.
987 * @param connections the connections object
988 * @param function the function
989 * @param data data to pass to it as a second arg
992 bus_connections_foreach (BusConnections *connections,
993 BusConnectionForeachFunction function,
996 if (!foreach_active (connections, function, data))
999 foreach_inactive (connections, function, data);
1003 bus_connections_get_context (BusConnections *connections)
1005 return connections->context;
1009 * This is used to avoid covering the same connection twice when
1010 * traversing connections. Note that it assumes we will
1011 * bus_connection_mark_stamp() each connection at least once per
1012 * INT_MAX increments of the global stamp, or wraparound would break
1016 bus_connections_increment_stamp (BusConnections *connections)
1018 connections->stamp += 1;
1021 /* Mark connection with current stamp, return TRUE if it
1022 * didn't already have that stamp
1025 bus_connection_mark_stamp (DBusConnection *connection)
1027 BusConnectionData *d;
1029 d = BUS_CONNECTION_DATA (connection);
1031 _dbus_assert (d != NULL);
1033 if (d->stamp == d->connections->stamp)
1037 d->stamp = d->connections->stamp;
1043 bus_connection_get_context (DBusConnection *connection)
1045 BusConnectionData *d;
1047 d = BUS_CONNECTION_DATA (connection);
1049 _dbus_assert (d != NULL);
1051 return d->connections->context;
1055 bus_connection_get_connections (DBusConnection *connection)
1057 BusConnectionData *d;
1059 d = BUS_CONNECTION_DATA (connection);
1061 _dbus_assert (d != NULL);
1063 return d->connections;
1067 bus_connection_get_registry (DBusConnection *connection)
1069 BusConnectionData *d;
1071 d = BUS_CONNECTION_DATA (connection);
1073 _dbus_assert (d != NULL);
1075 return bus_context_get_registry (d->connections->context);
1079 bus_connection_get_activation (DBusConnection *connection)
1081 BusConnectionData *d;
1083 d = BUS_CONNECTION_DATA (connection);
1085 _dbus_assert (d != NULL);
1087 return bus_context_get_activation (d->connections->context);
1091 bus_connection_get_matchmaker (DBusConnection *connection)
1093 BusConnectionData *d;
1095 d = BUS_CONNECTION_DATA (connection);
1097 _dbus_assert (d != NULL);
1099 return bus_context_get_matchmaker (d->connections->context);
1103 bus_connection_get_selinux_id (DBusConnection *connection)
1105 BusConnectionData *d;
1107 d = BUS_CONNECTION_DATA (connection);
1109 _dbus_assert (d != NULL);
1111 return d->selinux_id;
1115 * Checks whether the connection is registered with the message bus.
1117 * @param connection the connection
1118 * @returns #TRUE if we're an active message bus participant
1121 bus_connection_is_active (DBusConnection *connection)
1123 BusConnectionData *d;
1125 d = BUS_CONNECTION_DATA (connection);
1127 return d != NULL && d->name != NULL;
1131 bus_connection_preallocate_oom_error (DBusConnection *connection)
1133 DBusMessage *message;
1134 DBusPreallocatedSend *preallocated;
1135 BusConnectionData *d;
1137 d = BUS_CONNECTION_DATA (connection);
1139 _dbus_assert (d != NULL);
1141 if (d->oom_preallocated != NULL)
1144 preallocated = dbus_connection_preallocate_send (connection);
1145 if (preallocated == NULL)
1148 message = dbus_message_new (DBUS_MESSAGE_TYPE_ERROR);
1150 if (message == NULL)
1152 dbus_connection_free_preallocated_send (connection, preallocated);
1156 /* d->name may be NULL, but that is OK */
1157 if (!dbus_message_set_error_name (message, DBUS_ERROR_NO_MEMORY) ||
1158 !dbus_message_set_destination (message, d->name) ||
1159 !dbus_message_set_sender (message,
1162 dbus_connection_free_preallocated_send (connection, preallocated);
1163 dbus_message_unref (message);
1167 /* set reply serial to placeholder value just so space is already allocated
1170 if (!dbus_message_set_reply_serial (message, 14))
1172 dbus_connection_free_preallocated_send (connection, preallocated);
1173 dbus_message_unref (message);
1177 d->oom_message = message;
1178 d->oom_preallocated = preallocated;
1184 bus_connection_send_oom_error (DBusConnection *connection,
1185 DBusMessage *in_reply_to)
1187 BusConnectionData *d;
1189 d = BUS_CONNECTION_DATA (connection);
1191 _dbus_assert (d != NULL);
1192 _dbus_assert (d->oom_message != NULL);
1194 /* should always succeed since we set it to a placeholder earlier */
1195 if (!dbus_message_set_reply_serial (d->oom_message,
1196 dbus_message_get_serial (in_reply_to)))
1197 _dbus_assert_not_reached ("Failed to set reply serial for preallocated oom message");
1199 _dbus_assert (dbus_message_get_sender (d->oom_message) != NULL);
1201 dbus_connection_send_preallocated (connection, d->oom_preallocated,
1202 d->oom_message, NULL);
1204 dbus_message_unref (d->oom_message);
1205 d->oom_message = NULL;
1206 d->oom_preallocated = NULL;
1209 #ifdef DBUS_ENABLE_STATS
1211 update_peak (int *peak,
1220 bus_connection_add_match_rule_link (DBusConnection *connection,
1223 BusConnectionData *d;
1225 d = BUS_CONNECTION_DATA (connection);
1226 _dbus_assert (d != NULL);
1228 _dbus_list_append_link (&d->match_rules, link);
1230 d->n_match_rules += 1;
1232 #ifdef DBUS_ENABLE_STATS
1233 update_peak (&d->peak_match_rules, d->n_match_rules);
1234 update_peak (&d->connections->peak_match_rules_per_conn, d->n_match_rules);
1236 d->connections->total_match_rules += 1;
1237 update_peak (&d->connections->peak_match_rules,
1238 d->connections->total_match_rules);
1243 bus_connection_add_match_rule (DBusConnection *connection,
1248 link = _dbus_list_alloc_link (rule);
1253 bus_connection_add_match_rule_link (connection, link);
1259 bus_connection_remove_match_rule (DBusConnection *connection,
1262 BusConnectionData *d;
1264 d = BUS_CONNECTION_DATA (connection);
1265 _dbus_assert (d != NULL);
1267 _dbus_list_remove_last (&d->match_rules, rule);
1269 d->n_match_rules -= 1;
1270 _dbus_assert (d->n_match_rules >= 0);
1272 #ifdef DBUS_ENABLE_STATS
1273 d->connections->total_match_rules -= 1;
1278 bus_connection_get_n_match_rules (DBusConnection *connection)
1280 BusConnectionData *d;
1282 d = BUS_CONNECTION_DATA (connection);
1283 _dbus_assert (d != NULL);
1285 return d->n_match_rules;
1289 bus_connection_add_owned_service_link (DBusConnection *connection,
1292 BusConnectionData *d;
1294 d = BUS_CONNECTION_DATA (connection);
1295 _dbus_assert (d != NULL);
1297 _dbus_list_append_link (&d->services_owned, link);
1299 d->n_services_owned += 1;
1301 #ifdef DBUS_ENABLE_STATS
1302 update_peak (&d->peak_bus_names, d->n_services_owned);
1303 update_peak (&d->connections->peak_bus_names_per_conn,
1304 d->n_services_owned);
1306 d->connections->total_bus_names += 1;
1307 update_peak (&d->connections->peak_bus_names,
1308 d->connections->total_bus_names);
1313 bus_connection_add_owned_service (DBusConnection *connection,
1314 BusService *service)
1318 link = _dbus_list_alloc_link (service);
1323 bus_connection_add_owned_service_link (connection, link);
1329 bus_connection_remove_owned_service (DBusConnection *connection,
1330 BusService *service)
1332 BusConnectionData *d;
1334 d = BUS_CONNECTION_DATA (connection);
1335 _dbus_assert (d != NULL);
1337 _dbus_list_remove_last (&d->services_owned, service);
1339 d->n_services_owned -= 1;
1340 _dbus_assert (d->n_services_owned >= 0);
1342 #ifdef DBUS_ENABLE_STATS
1343 d->connections->total_bus_names -= 1;
1348 bus_connection_get_n_services_owned (DBusConnection *connection)
1350 BusConnectionData *d;
1352 d = BUS_CONNECTION_DATA (connection);
1353 _dbus_assert (d != NULL);
1355 return d->n_services_owned;
1359 bus_connection_complete (DBusConnection *connection,
1360 const DBusString *name,
1363 BusConnectionData *d;
1366 d = BUS_CONNECTION_DATA (connection);
1367 _dbus_assert (d != NULL);
1368 _dbus_assert (d->name == NULL);
1369 _dbus_assert (d->policy == NULL);
1371 _dbus_assert (!bus_connection_is_active (connection));
1373 if (!_dbus_string_copy_data (name, &d->name))
1375 BUS_SET_OOM (error);
1379 _dbus_assert (d->name != NULL);
1381 _dbus_verbose ("Name %s assigned to %p\n", d->name, connection);
1383 d->policy = bus_context_create_client_policy (d->connections->context,
1387 /* we may have a NULL policy on OOM or error getting list of
1388 * groups for a user. In the latter case we don't handle it so
1389 * well currently, as it will just keep failing over and over.
1392 if (d->policy == NULL)
1394 _dbus_verbose ("Failed to create security policy for connection %p\n",
1396 _DBUS_ASSERT_ERROR_IS_SET (error);
1397 dbus_free (d->name);
1402 if (dbus_connection_get_unix_user (connection, &uid))
1404 if (!adjust_connections_for_uid (d->connections,
1409 /* Create and cache a string which holds information about the
1410 * peer process; used for logging purposes.
1412 if (!cache_peer_loginfo_string (d, connection))
1415 /* Now the connection is active, move it between lists */
1416 _dbus_list_unlink (&d->connections->incomplete,
1417 d->link_in_connection_list);
1418 d->connections->n_incomplete -= 1;
1419 _dbus_list_append_link (&d->connections->completed,
1420 d->link_in_connection_list);
1421 d->connections->n_completed += 1;
1423 _dbus_assert (d->connections->n_incomplete >= 0);
1424 _dbus_assert (d->connections->n_completed > 0);
1426 /* See if we can remove the timeout */
1427 bus_connections_expire_incomplete (d->connections);
1429 _dbus_assert (bus_connection_is_active (connection));
1433 BUS_SET_OOM (error);
1434 dbus_free (d->name);
1437 bus_client_policy_unref (d->policy);
1443 bus_connection_get_name (DBusConnection *connection)
1445 BusConnectionData *d;
1447 d = BUS_CONNECTION_DATA (connection);
1448 _dbus_assert (d != NULL);
1454 * Check whether completing the passed-in connection would
1455 * exceed limits, and if so set error and return #FALSE
1458 bus_connections_check_limits (BusConnections *connections,
1459 DBusConnection *requesting_completion,
1462 BusConnectionData *d;
1465 d = BUS_CONNECTION_DATA (requesting_completion);
1466 _dbus_assert (d != NULL);
1468 _dbus_assert (d->name == NULL);
1470 if (connections->n_completed >=
1471 bus_context_get_max_completed_connections (connections->context))
1473 dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
1474 "The maximum number of active connections has been reached");
1478 if (dbus_connection_get_unix_user (requesting_completion, &uid))
1480 if (get_connections_for_uid (connections, uid) >=
1481 bus_context_get_max_connections_per_user (connections->context))
1483 dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
1484 "The maximum number of active connections for UID %lu has been reached",
1494 bus_pending_reply_free (BusPendingReply *pending)
1496 _dbus_verbose ("Freeing pending reply %p, replier %p receiver %p serial %u\n",
1498 pending->will_send_reply,
1499 pending->will_get_reply,
1500 pending->reply_serial);
1502 dbus_free (pending);
1506 bus_pending_reply_send_no_reply (BusConnections *connections,
1507 BusTransaction *transaction,
1508 BusPendingReply *pending)
1510 DBusMessage *message;
1511 DBusMessageIter iter;
1517 message = dbus_message_new (DBUS_MESSAGE_TYPE_ERROR);
1518 if (message == NULL)
1521 dbus_message_set_no_reply (message, TRUE);
1523 if (!dbus_message_set_reply_serial (message,
1524 pending->reply_serial))
1527 if (!dbus_message_set_error_name (message,
1528 DBUS_ERROR_NO_REPLY))
1531 errmsg = "Message did not receive a reply (timeout by message bus)";
1532 dbus_message_iter_init_append (message, &iter);
1533 if (!dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &errmsg))
1536 if (!bus_transaction_send_from_driver (transaction, pending->will_get_reply,
1543 dbus_message_unref (message);
1548 bus_pending_reply_expired (BusExpireList *list,
1552 BusPendingReply *pending = link->data;
1553 BusConnections *connections = data;
1554 BusTransaction *transaction;
1556 /* No reply is forthcoming. So nuke it if we can. If not,
1557 * leave it in the list to try expiring again later when we
1561 _dbus_verbose ("Expiring pending reply %p, replier %p receiver %p serial %u\n",
1563 pending->will_send_reply,
1564 pending->will_get_reply,
1565 pending->reply_serial);
1567 transaction = bus_transaction_new (connections->context);
1568 if (transaction == NULL)
1571 if (!bus_pending_reply_send_no_reply (connections,
1575 bus_transaction_cancel_and_free (transaction);
1579 bus_expire_list_remove_link (connections->pending_replies, link);
1581 bus_pending_reply_free (pending);
1582 bus_transaction_execute_and_free (transaction);
1588 bus_connection_drop_pending_replies (BusConnections *connections,
1589 DBusConnection *connection)
1591 /* The DBusConnection is almost 100% finalized here, so you can't
1592 * do anything with it except check for pointer equality
1596 _dbus_verbose ("Dropping pending replies that involve connection %p\n",
1599 link = bus_expire_list_get_first_link (connections->pending_replies);
1600 while (link != NULL)
1603 BusPendingReply *pending;
1605 next = bus_expire_list_get_next_link (connections->pending_replies,
1607 pending = link->data;
1609 if (pending->will_get_reply == connection)
1611 /* We don't need to track this pending reply anymore */
1613 _dbus_verbose ("Dropping pending reply %p, replier %p receiver %p serial %u\n",
1615 pending->will_send_reply,
1616 pending->will_get_reply,
1617 pending->reply_serial);
1619 bus_expire_list_remove_link (connections->pending_replies,
1621 bus_pending_reply_free (pending);
1623 else if (pending->will_send_reply == connection)
1625 /* The reply isn't going to be sent, so set things
1626 * up so it will be expired right away
1628 _dbus_verbose ("Will expire pending reply %p, replier %p receiver %p serial %u\n",
1630 pending->will_send_reply,
1631 pending->will_get_reply,
1632 pending->reply_serial);
1634 pending->will_send_reply = NULL;
1635 pending->expire_item.added_tv_sec = 0;
1636 pending->expire_item.added_tv_usec = 0;
1638 bus_expire_list_recheck_immediately (connections->pending_replies);
1648 BusPendingReply *pending;
1649 BusConnections *connections;
1650 } CancelPendingReplyData;
1653 cancel_pending_reply (void *data)
1655 CancelPendingReplyData *d = data;
1657 _dbus_verbose ("d = %p\n", d);
1659 if (!bus_expire_list_remove (d->connections->pending_replies,
1660 &d->pending->expire_item))
1661 _dbus_assert_not_reached ("pending reply did not exist to be cancelled");
1663 bus_pending_reply_free (d->pending); /* since it's been cancelled */
1667 cancel_pending_reply_data_free (void *data)
1669 CancelPendingReplyData *d = data;
1671 _dbus_verbose ("d = %p\n", d);
1673 /* d->pending should be either freed or still
1674 * in the list of pending replies (owned by someone
1682 * Record that a reply is allowed; return TRUE on success.
1685 bus_connections_expect_reply (BusConnections *connections,
1686 BusTransaction *transaction,
1687 DBusConnection *will_get_reply,
1688 DBusConnection *will_send_reply,
1689 DBusMessage *reply_to_this,
1692 BusPendingReply *pending;
1693 dbus_uint32_t reply_serial;
1695 CancelPendingReplyData *cprd;
1698 _dbus_assert (will_get_reply != NULL);
1699 _dbus_assert (will_send_reply != NULL);
1700 _dbus_assert (reply_to_this != NULL);
1702 if (dbus_message_get_no_reply (reply_to_this))
1703 return TRUE; /* we won't allow a reply, since client doesn't care for one. */
1705 reply_serial = dbus_message_get_serial (reply_to_this);
1707 link = bus_expire_list_get_first_link (connections->pending_replies);
1709 while (link != NULL)
1711 pending = link->data;
1713 if (pending->reply_serial == reply_serial &&
1714 pending->will_get_reply == will_get_reply &&
1715 pending->will_send_reply == will_send_reply)
1717 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1718 "Message has the same reply serial as a currently-outstanding existing method call");
1722 link = bus_expire_list_get_next_link (connections->pending_replies,
1724 if (pending->will_get_reply == will_get_reply)
1729 bus_context_get_max_replies_per_connection (connections->context))
1731 dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
1732 "The maximum number of pending replies per connection has been reached");
1736 pending = dbus_new0 (BusPendingReply, 1);
1737 if (pending == NULL)
1739 BUS_SET_OOM (error);
1743 #ifdef DBUS_ENABLE_VERBOSE_MODE
1744 /* so we can see a not-yet-added pending reply */
1745 pending->expire_item.added_tv_sec = 1;
1746 pending->expire_item.added_tv_usec = 1;
1749 pending->will_get_reply = will_get_reply;
1750 pending->will_send_reply = will_send_reply;
1751 pending->reply_serial = reply_serial;
1753 cprd = dbus_new0 (CancelPendingReplyData, 1);
1756 BUS_SET_OOM (error);
1757 bus_pending_reply_free (pending);
1761 if (!bus_expire_list_add (connections->pending_replies,
1762 &pending->expire_item))
1764 BUS_SET_OOM (error);
1766 bus_pending_reply_free (pending);
1770 if (!bus_transaction_add_cancel_hook (transaction,
1771 cancel_pending_reply,
1773 cancel_pending_reply_data_free))
1775 BUS_SET_OOM (error);
1776 bus_expire_list_remove (connections->pending_replies, &pending->expire_item);
1778 bus_pending_reply_free (pending);
1782 cprd->pending = pending;
1783 cprd->connections = connections;
1785 _dbus_get_current_time (&pending->expire_item.added_tv_sec,
1786 &pending->expire_item.added_tv_usec);
1788 _dbus_verbose ("Added pending reply %p, replier %p receiver %p serial %u\n",
1790 pending->will_send_reply,
1791 pending->will_get_reply,
1792 pending->reply_serial);
1800 BusConnections *connections;
1801 } CheckPendingReplyData;
1804 cancel_check_pending_reply (void *data)
1806 CheckPendingReplyData *d = data;
1808 _dbus_verbose ("d = %p\n",d);
1810 bus_expire_list_add_link (d->connections->pending_replies,
1816 check_pending_reply_data_free (void *data)
1818 CheckPendingReplyData *d = data;
1820 _dbus_verbose ("d = %p\n",d);
1822 if (d->link != NULL)
1824 BusPendingReply *pending = d->link->data;
1826 _dbus_assert (!bus_expire_list_contains_item (d->connections->pending_replies,
1827 &pending->expire_item));
1829 bus_pending_reply_free (pending);
1830 _dbus_list_free_link (d->link);
1837 * Check whether a reply is allowed, remove BusPendingReply
1838 * if so, return TRUE if so.
1841 bus_connections_check_reply (BusConnections *connections,
1842 BusTransaction *transaction,
1843 DBusConnection *sending_reply,
1844 DBusConnection *receiving_reply,
1848 CheckPendingReplyData *cprd;
1850 dbus_uint32_t reply_serial;
1852 _dbus_assert (sending_reply != NULL);
1853 _dbus_assert (receiving_reply != NULL);
1855 reply_serial = dbus_message_get_reply_serial (reply);
1857 link = bus_expire_list_get_first_link (connections->pending_replies);
1858 while (link != NULL)
1860 BusPendingReply *pending = link->data;
1862 if (pending->reply_serial == reply_serial &&
1863 pending->will_get_reply == receiving_reply &&
1864 pending->will_send_reply == sending_reply)
1866 _dbus_verbose ("Found pending reply with serial %u\n", reply_serial);
1870 link = bus_expire_list_get_next_link (connections->pending_replies,
1876 _dbus_verbose ("No pending reply expected\n");
1881 cprd = dbus_new0 (CheckPendingReplyData, 1);
1884 BUS_SET_OOM (error);
1888 if (!bus_transaction_add_cancel_hook (transaction,
1889 cancel_check_pending_reply,
1891 check_pending_reply_data_free))
1893 BUS_SET_OOM (error);
1899 cprd->connections = connections;
1901 bus_expire_list_unlink (connections->pending_replies,
1904 _dbus_assert (!bus_expire_list_contains_item (connections->pending_replies, link->data));
1912 * Note that this is fairly fragile; in particular, don't try to use
1913 * one transaction across any main loop iterations.
1918 BusTransaction *transaction;
1919 DBusMessage *message;
1920 DBusPreallocatedSend *preallocated;
1925 BusTransactionCancelFunction cancel_function;
1926 DBusFreeFunction free_data_function;
1930 struct BusTransaction
1932 DBusList *connections;
1933 BusContext *context;
1934 DBusList *cancel_hooks;
1938 message_to_send_free (DBusConnection *connection,
1939 MessageToSend *to_send)
1941 if (to_send->message)
1942 dbus_message_unref (to_send->message);
1944 if (to_send->preallocated)
1945 dbus_connection_free_preallocated_send (connection, to_send->preallocated);
1947 dbus_free (to_send);
1951 cancel_hook_cancel (void *element,
1954 CancelHook *ch = element;
1956 _dbus_verbose ("Running transaction cancel hook\n");
1958 if (ch->cancel_function)
1959 (* ch->cancel_function) (ch->data);
1963 cancel_hook_free (void *element,
1966 CancelHook *ch = element;
1968 if (ch->free_data_function)
1969 (* ch->free_data_function) (ch->data);
1975 free_cancel_hooks (BusTransaction *transaction)
1977 _dbus_list_foreach (&transaction->cancel_hooks,
1978 cancel_hook_free, NULL);
1980 _dbus_list_clear (&transaction->cancel_hooks);
1984 bus_transaction_new (BusContext *context)
1986 BusTransaction *transaction;
1988 transaction = dbus_new0 (BusTransaction, 1);
1989 if (transaction == NULL)
1992 transaction->context = context;
1998 bus_transaction_get_context (BusTransaction *transaction)
2000 return transaction->context;
2004 bus_transaction_get_connections (BusTransaction *transaction)
2006 return bus_context_get_connections (transaction->context);
2010 bus_transaction_send_from_driver (BusTransaction *transaction,
2011 DBusConnection *connection,
2012 DBusMessage *message)
2014 /* We have to set the sender to the driver, and have
2015 * to check security policy since it was not done in
2018 _dbus_verbose ("Sending %s %s %s from driver\n",
2019 dbus_message_get_interface (message) ?
2020 dbus_message_get_interface (message) : "(no interface)",
2021 dbus_message_get_member (message) ?
2022 dbus_message_get_member (message) : "(no member)",
2023 dbus_message_get_error_name (message) ?
2024 dbus_message_get_error_name (message) : "(no error name)");
2026 if (!dbus_message_set_sender (message, DBUS_SERVICE_DBUS))
2029 if (bus_connection_is_active (connection))
2031 if (!dbus_message_set_destination (message,
2032 bus_connection_get_name (connection)))
2036 /* bus driver never wants a reply */
2037 dbus_message_set_no_reply (message, TRUE);
2039 /* If security policy doesn't allow the message, we silently
2040 * eat it; the driver doesn't care about getting a reply.
2042 if (!bus_context_check_security_policy (bus_transaction_get_context (transaction),
2044 NULL, connection, connection, message, NULL))
2047 return bus_transaction_send (transaction, connection, message);
2051 bus_transaction_send (BusTransaction *transaction,
2052 DBusConnection *connection,
2053 DBusMessage *message)
2055 MessageToSend *to_send;
2056 BusConnectionData *d;
2059 _dbus_verbose (" trying to add %s interface=%s member=%s error=%s to transaction%s\n",
2060 dbus_message_get_type (message) == DBUS_MESSAGE_TYPE_ERROR ? "error" :
2061 dbus_message_get_reply_serial (message) != 0 ? "reply" :
2063 dbus_message_get_interface (message) ?
2064 dbus_message_get_interface (message) : "(unset)",
2065 dbus_message_get_member (message) ?
2066 dbus_message_get_member (message) : "(unset)",
2067 dbus_message_get_error_name (message) ?
2068 dbus_message_get_error_name (message) : "(unset)",
2069 dbus_connection_get_is_connected (connection) ?
2070 "" : " (disconnected)");
2072 _dbus_assert (dbus_message_get_sender (message) != NULL);
2074 if (!dbus_connection_get_is_connected (connection))
2075 return TRUE; /* silently ignore disconnected connections */
2077 d = BUS_CONNECTION_DATA (connection);
2078 _dbus_assert (d != NULL);
2080 to_send = dbus_new (MessageToSend, 1);
2081 if (to_send == NULL)
2086 to_send->preallocated = dbus_connection_preallocate_send (connection);
2087 if (to_send->preallocated == NULL)
2089 dbus_free (to_send);
2093 dbus_message_ref (message);
2094 to_send->message = message;
2095 to_send->transaction = transaction;
2097 _dbus_verbose ("about to prepend message\n");
2099 if (!_dbus_list_prepend (&d->transaction_messages, to_send))
2101 message_to_send_free (connection, to_send);
2105 _dbus_verbose ("prepended message\n");
2107 /* See if we already had this connection in the list
2108 * for this transaction. If we have a pending message,
2109 * then we should already be in transaction->connections
2111 link = _dbus_list_get_first_link (&d->transaction_messages);
2112 _dbus_assert (link->data == to_send);
2113 link = _dbus_list_get_next_link (&d->transaction_messages, link);
2114 while (link != NULL)
2116 MessageToSend *m = link->data;
2117 DBusList *next = _dbus_list_get_next_link (&d->transaction_messages, link);
2119 if (m->transaction == transaction)
2127 if (!_dbus_list_prepend (&transaction->connections, connection))
2129 _dbus_list_remove (&d->transaction_messages, to_send);
2130 message_to_send_free (connection, to_send);
2139 connection_cancel_transaction (DBusConnection *connection,
2140 BusTransaction *transaction)
2143 BusConnectionData *d;
2145 d = BUS_CONNECTION_DATA (connection);
2146 _dbus_assert (d != NULL);
2148 link = _dbus_list_get_first_link (&d->transaction_messages);
2149 while (link != NULL)
2151 MessageToSend *m = link->data;
2152 DBusList *next = _dbus_list_get_next_link (&d->transaction_messages, link);
2154 if (m->transaction == transaction)
2156 _dbus_list_remove_link (&d->transaction_messages,
2159 message_to_send_free (connection, m);
2167 bus_transaction_cancel_and_free (BusTransaction *transaction)
2169 DBusConnection *connection;
2171 _dbus_verbose ("TRANSACTION: cancelled\n");
2173 while ((connection = _dbus_list_pop_first (&transaction->connections)))
2174 connection_cancel_transaction (connection, transaction);
2176 _dbus_assert (transaction->connections == NULL);
2178 _dbus_list_foreach (&transaction->cancel_hooks,
2179 cancel_hook_cancel, NULL);
2181 free_cancel_hooks (transaction);
2183 dbus_free (transaction);
2187 connection_execute_transaction (DBusConnection *connection,
2188 BusTransaction *transaction)
2191 BusConnectionData *d;
2193 d = BUS_CONNECTION_DATA (connection);
2194 _dbus_assert (d != NULL);
2196 /* Send the queue in order (FIFO) */
2197 link = _dbus_list_get_last_link (&d->transaction_messages);
2198 while (link != NULL)
2200 MessageToSend *m = link->data;
2201 DBusList *prev = _dbus_list_get_prev_link (&d->transaction_messages, link);
2203 if (m->transaction == transaction)
2205 _dbus_list_remove_link (&d->transaction_messages,
2208 _dbus_assert (dbus_message_get_sender (m->message) != NULL);
2210 dbus_connection_send_preallocated (connection,
2215 m->preallocated = NULL; /* so we don't double-free it */
2217 message_to_send_free (connection, m);
2225 bus_transaction_execute_and_free (BusTransaction *transaction)
2227 /* For each connection in transaction->connections
2230 DBusConnection *connection;
2232 _dbus_verbose ("TRANSACTION: executing\n");
2234 while ((connection = _dbus_list_pop_first (&transaction->connections)))
2235 connection_execute_transaction (connection, transaction);
2237 _dbus_assert (transaction->connections == NULL);
2239 free_cancel_hooks (transaction);
2241 dbus_free (transaction);
2245 bus_connection_remove_transactions (DBusConnection *connection)
2247 MessageToSend *to_send;
2248 BusConnectionData *d;
2250 d = BUS_CONNECTION_DATA (connection);
2251 _dbus_assert (d != NULL);
2253 while ((to_send = _dbus_list_get_first (&d->transaction_messages)))
2255 /* only has an effect for the first MessageToSend listing this transaction */
2256 _dbus_list_remove (&to_send->transaction->connections,
2259 _dbus_list_remove (&d->transaction_messages, to_send);
2260 message_to_send_free (connection, to_send);
2265 * Converts the DBusError to a message reply
2268 bus_transaction_send_error_reply (BusTransaction *transaction,
2269 DBusConnection *connection,
2270 const DBusError *error,
2271 DBusMessage *in_reply_to)
2275 _dbus_assert (error != NULL);
2276 _DBUS_ASSERT_ERROR_IS_SET (error);
2278 _dbus_verbose ("Sending error reply %s \"%s\"\n",
2279 error->name, error->message);
2281 reply = dbus_message_new_error (in_reply_to,
2287 if (!bus_transaction_send_from_driver (transaction, connection, reply))
2289 dbus_message_unref (reply);
2293 dbus_message_unref (reply);
2299 bus_transaction_add_cancel_hook (BusTransaction *transaction,
2300 BusTransactionCancelFunction cancel_function,
2302 DBusFreeFunction free_data_function)
2306 ch = dbus_new (CancelHook, 1);
2310 _dbus_verbose (" adding cancel hook function = %p data = %p\n",
2311 cancel_function, data);
2313 ch->cancel_function = cancel_function;
2315 ch->free_data_function = free_data_function;
2317 /* It's important that the hooks get run in reverse order that they
2320 if (!_dbus_list_prepend (&transaction->cancel_hooks, ch))
2329 #ifdef DBUS_ENABLE_STATS
2331 bus_connections_get_n_active (BusConnections *connections)
2333 return connections->n_completed;
2337 bus_connections_get_n_incomplete (BusConnections *connections)
2339 return connections->n_incomplete;
2343 bus_connections_get_total_match_rules (BusConnections *connections)
2345 return connections->total_match_rules;
2349 bus_connections_get_peak_match_rules (BusConnections *connections)
2351 return connections->peak_match_rules;
2355 bus_connections_get_peak_match_rules_per_conn (BusConnections *connections)
2357 return connections->peak_match_rules_per_conn;
2361 bus_connections_get_total_bus_names (BusConnections *connections)
2363 return connections->total_bus_names;
2367 bus_connections_get_peak_bus_names (BusConnections *connections)
2369 return connections->peak_bus_names;
2373 bus_connections_get_peak_bus_names_per_conn (BusConnections *connections)
2375 return connections->peak_bus_names_per_conn;
2379 bus_connection_get_peak_match_rules (DBusConnection *connection)
2381 BusConnectionData *d;
2383 d = BUS_CONNECTION_DATA (connection);
2384 return d->peak_match_rules;
2388 bus_connection_get_peak_bus_names (DBusConnection *connection)
2390 BusConnectionData *d;
2392 d = BUS_CONNECTION_DATA (connection);
2393 return d->peak_bus_names;
2395 #endif /* DBUS_ENABLE_STATS */