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 */
67 static dbus_int32_t connection_data_slot = -1;
71 BusConnections *connections;
72 DBusList *link_in_connection_list;
73 DBusConnection *connection;
74 DBusList *services_owned;
76 DBusList *match_rules;
79 DBusList *transaction_messages; /**< Stuff we need to send as part of a transaction */
80 DBusMessage *oom_message;
81 DBusPreallocatedSend *oom_preallocated;
82 BusClientPolicy *policy;
84 char *cached_loginfo_string;
85 BusSELinuxID *selinux_id;
87 long connection_tv_sec; /**< Time when we connected (seconds component) */
88 long connection_tv_usec; /**< Time when we connected (microsec component) */
89 int stamp; /**< connections->stamp last time we were traversed */
92 static dbus_bool_t bus_pending_reply_expired (BusExpireList *list,
96 static void bus_connection_drop_pending_replies (BusConnections *connections,
97 DBusConnection *connection);
99 static dbus_bool_t expire_incomplete_timeout (void *data);
101 #define BUS_CONNECTION_DATA(connection) (dbus_connection_get_data ((connection), connection_data_slot))
104 connection_get_loop (DBusConnection *connection)
106 BusConnectionData *d;
108 d = BUS_CONNECTION_DATA (connection);
110 return bus_context_get_loop (d->connections->context);
115 get_connections_for_uid (BusConnections *connections,
121 /* val is NULL is 0 when it isn't in the hash yet */
123 val = _dbus_hash_table_lookup_uintptr (connections->completed_by_user,
126 current_count = _DBUS_POINTER_TO_INT (val);
128 return current_count;
132 adjust_connections_for_uid (BusConnections *connections,
138 current_count = get_connections_for_uid (connections, uid);
140 _dbus_verbose ("Adjusting connection count for UID " DBUS_UID_FORMAT
141 ": was %d adjustment %d making %d\n",
142 uid, current_count, adjustment, current_count + adjustment);
144 _dbus_assert (current_count >= 0);
146 current_count += adjustment;
148 _dbus_assert (current_count >= 0);
150 if (current_count == 0)
152 _dbus_hash_table_remove_uintptr (connections->completed_by_user, uid);
159 retval = _dbus_hash_table_insert_uintptr (connections->completed_by_user,
160 uid, _DBUS_INT_TO_POINTER (current_count));
162 /* only positive adjustment can fail as otherwise
163 * a hash entry should already exist
165 _dbus_assert (adjustment > 0 ||
166 (adjustment <= 0 && retval));
173 bus_connection_disconnected (DBusConnection *connection)
175 BusConnectionData *d;
177 BusMatchmaker *matchmaker;
179 d = BUS_CONNECTION_DATA (connection);
180 _dbus_assert (d != NULL);
182 _dbus_verbose ("%s disconnected, dropping all service ownership and releasing\n",
183 d->name ? d->name : "(inactive)");
185 /* Delete our match rules */
186 if (d->n_match_rules > 0)
188 matchmaker = bus_context_get_matchmaker (d->connections->context);
189 bus_matchmaker_disconnected (matchmaker, connection);
192 /* Drop any service ownership. Unfortunately, this requires
193 * memory allocation and there doesn't seem to be a good way to
194 * handle it other than sleeping; we can't "fail" the operation of
195 * disconnecting a client, and preallocating a broadcast "service is
196 * now gone" message for every client-service pair seems kind of
199 while ((service = _dbus_list_get_last (&d->services_owned)))
201 BusTransaction *transaction;
206 dbus_error_init (&error);
208 while ((transaction = bus_transaction_new (d->connections->context)) == NULL)
209 _dbus_wait_for_memory ();
211 if (!bus_service_remove_owner (service, connection,
212 transaction, &error))
214 _DBUS_ASSERT_ERROR_IS_SET (&error);
216 if (dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY))
218 dbus_error_free (&error);
219 bus_transaction_cancel_and_free (transaction);
220 _dbus_wait_for_memory ();
225 _dbus_verbose ("Failed to remove service owner: %s %s\n",
226 error.name, error.message);
227 _dbus_assert_not_reached ("Removing service owner failed for non-memory-related reason");
231 bus_transaction_execute_and_free (transaction);
234 bus_dispatch_remove_connection (connection);
236 /* no more watching */
237 if (!dbus_connection_set_watch_functions (connection,
241 _dbus_assert_not_reached ("setting watch functions to NULL failed");
243 if (!dbus_connection_set_timeout_functions (connection,
247 _dbus_assert_not_reached ("setting timeout functions to NULL failed");
249 dbus_connection_set_unix_user_function (connection,
251 dbus_connection_set_windows_user_function (connection,
254 dbus_connection_set_dispatch_status_function (connection,
257 bus_connection_remove_transactions (connection);
259 if (d->link_in_connection_list != NULL)
265 _dbus_list_remove_link (&d->connections->completed, d->link_in_connection_list);
266 d->link_in_connection_list = NULL;
267 d->connections->n_completed -= 1;
269 if (dbus_connection_get_unix_user (connection, &uid))
271 if (!adjust_connections_for_uid (d->connections,
273 _dbus_assert_not_reached ("adjusting downward should never fail");
278 _dbus_list_remove_link (&d->connections->incomplete, d->link_in_connection_list);
279 d->link_in_connection_list = NULL;
280 d->connections->n_incomplete -= 1;
283 _dbus_assert (d->connections->n_incomplete >= 0);
284 _dbus_assert (d->connections->n_completed >= 0);
287 bus_connection_drop_pending_replies (d->connections, connection);
289 /* frees "d" as side effect */
290 dbus_connection_set_data (connection,
291 connection_data_slot,
294 dbus_connection_unref (connection);
298 connection_watch_callback (DBusWatch *watch,
299 unsigned int condition,
302 /* FIXME this can be done in dbus-mainloop.c
303 * if the code in activation.c for the babysitter
304 * watch handler is fixed.
308 _dbus_verbose ("Calling handle_watch\n");
310 return dbus_watch_handle (watch, condition);
314 add_connection_watch (DBusWatch *watch,
317 DBusConnection *connection = data;
319 return _dbus_loop_add_watch (connection_get_loop (connection),
320 watch, connection_watch_callback, connection,
325 remove_connection_watch (DBusWatch *watch,
328 DBusConnection *connection = data;
330 _dbus_loop_remove_watch (connection_get_loop (connection),
331 watch, connection_watch_callback, connection);
335 connection_timeout_callback (DBusTimeout *timeout,
338 /* DBusConnection *connection = data; */
340 /* can return FALSE on OOM but we just let it fire again later */
341 dbus_timeout_handle (timeout);
345 add_connection_timeout (DBusTimeout *timeout,
348 DBusConnection *connection = data;
350 return _dbus_loop_add_timeout (connection_get_loop (connection),
351 timeout, connection_timeout_callback, connection, NULL);
355 remove_connection_timeout (DBusTimeout *timeout,
358 DBusConnection *connection = data;
360 _dbus_loop_remove_timeout (connection_get_loop (connection),
361 timeout, connection_timeout_callback, connection);
365 dispatch_status_function (DBusConnection *connection,
366 DBusDispatchStatus new_status,
369 DBusLoop *loop = data;
371 if (new_status != DBUS_DISPATCH_COMPLETE)
373 while (!_dbus_loop_queue_dispatch (loop, connection))
374 _dbus_wait_for_memory ();
379 allow_unix_user_function (DBusConnection *connection,
383 BusConnectionData *d;
385 d = BUS_CONNECTION_DATA (connection);
387 _dbus_assert (d != NULL);
389 return bus_context_allow_unix_user (d->connections->context, uid);
393 free_connection_data (void *data)
395 BusConnectionData *d = data;
397 /* services_owned should be NULL since we should be disconnected */
398 _dbus_assert (d->services_owned == NULL);
399 _dbus_assert (d->n_services_owned == 0);
401 _dbus_assert (d->transaction_messages == NULL);
403 if (d->oom_preallocated)
404 dbus_connection_free_preallocated_send (d->connection, d->oom_preallocated);
407 dbus_message_unref (d->oom_message);
410 bus_client_policy_unref (d->policy);
413 bus_selinux_id_unref (d->selinux_id);
415 dbus_free (d->cached_loginfo_string);
423 call_timeout_callback (DBusTimeout *timeout,
426 /* can return FALSE on OOM but we just let it fire again later */
427 dbus_timeout_handle (timeout);
431 bus_connections_new (BusContext *context)
433 BusConnections *connections;
435 if (!dbus_connection_allocate_data_slot (&connection_data_slot))
438 connections = dbus_new0 (BusConnections, 1);
439 if (connections == NULL)
442 connections->completed_by_user = _dbus_hash_table_new (DBUS_HASH_UINTPTR,
444 if (connections->completed_by_user == NULL)
447 connections->expire_timeout = _dbus_timeout_new (100, /* irrelevant */
448 expire_incomplete_timeout,
450 if (connections->expire_timeout == NULL)
453 _dbus_timeout_set_enabled (connections->expire_timeout, FALSE);
455 connections->pending_replies = bus_expire_list_new (bus_context_get_loop (context),
456 bus_context_get_reply_timeout (context),
457 bus_pending_reply_expired,
459 if (connections->pending_replies == NULL)
462 if (!_dbus_loop_add_timeout (bus_context_get_loop (context),
463 connections->expire_timeout,
464 call_timeout_callback, NULL, NULL))
467 connections->refcount = 1;
468 connections->context = context;
473 bus_expire_list_free (connections->pending_replies);
475 _dbus_timeout_unref (connections->expire_timeout);
477 _dbus_hash_table_unref (connections->completed_by_user);
479 dbus_free (connections);
481 dbus_connection_free_data_slot (&connection_data_slot);
487 bus_connections_ref (BusConnections *connections)
489 _dbus_assert (connections->refcount > 0);
490 connections->refcount += 1;
496 bus_connections_unref (BusConnections *connections)
498 _dbus_assert (connections->refcount > 0);
499 connections->refcount -= 1;
500 if (connections->refcount == 0)
502 /* drop all incomplete */
503 while (connections->incomplete != NULL)
505 DBusConnection *connection;
507 connection = connections->incomplete->data;
509 dbus_connection_ref (connection);
510 dbus_connection_close (connection);
511 bus_connection_disconnected (connection);
512 dbus_connection_unref (connection);
515 _dbus_assert (connections->n_incomplete == 0);
517 /* drop all real connections */
518 while (connections->completed != NULL)
520 DBusConnection *connection;
522 connection = connections->completed->data;
524 dbus_connection_ref (connection);
525 dbus_connection_close (connection);
526 bus_connection_disconnected (connection);
527 dbus_connection_unref (connection);
530 _dbus_assert (connections->n_completed == 0);
532 bus_expire_list_free (connections->pending_replies);
534 _dbus_loop_remove_timeout (bus_context_get_loop (connections->context),
535 connections->expire_timeout,
536 call_timeout_callback, NULL);
538 _dbus_timeout_unref (connections->expire_timeout);
540 _dbus_hash_table_unref (connections->completed_by_user);
542 dbus_free (connections);
544 dbus_connection_free_data_slot (&connection_data_slot);
548 /* Used for logging */
550 cache_peer_loginfo_string (BusConnectionData *d,
551 DBusConnection *connection)
553 DBusString loginfo_buf;
557 dbus_bool_t prev_added;
559 if (!_dbus_string_init (&loginfo_buf))
563 if (dbus_connection_get_unix_user (connection, &uid))
565 if (!_dbus_string_append_printf (&loginfo_buf, "uid=%ld", uid))
571 if (dbus_connection_get_unix_process_id (connection, &pid))
575 if (!_dbus_string_append_byte (&loginfo_buf, ' '))
578 if (!_dbus_string_append_printf (&loginfo_buf, "pid=%ld comm=\"", pid))
580 /* Ignore errors here; we may not have permissions to read the
582 _dbus_command_for_pid (pid, &loginfo_buf, MAX_LOG_COMMAND_LEN, NULL);
583 if (!_dbus_string_append_byte (&loginfo_buf, '"'))
587 if (dbus_connection_get_windows_user (connection, &windows_sid))
589 dbus_bool_t did_append;
590 did_append = _dbus_string_append_printf (&loginfo_buf,
591 "sid=\"%s\" ", windows_sid);
592 dbus_free (windows_sid);
597 if (!_dbus_string_steal_data (&loginfo_buf, &(d->cached_loginfo_string)))
600 _dbus_string_free (&loginfo_buf);
604 _dbus_string_free (&loginfo_buf);
609 bus_connections_setup_connection (BusConnections *connections,
610 DBusConnection *connection)
613 BusConnectionData *d;
618 d = dbus_new0 (BusConnectionData, 1);
623 d->connections = connections;
624 d->connection = connection;
626 _dbus_get_current_time (&d->connection_tv_sec,
627 &d->connection_tv_usec);
629 _dbus_assert (connection_data_slot >= 0);
631 if (!dbus_connection_set_data (connection,
632 connection_data_slot,
633 d, free_connection_data))
639 dbus_connection_set_route_peer_messages (connection, TRUE);
643 dbus_error_init (&error);
644 d->selinux_id = bus_selinux_init_connection_id (connection,
646 if (dbus_error_is_set (&error))
648 /* This is a bit bogus because we pretend all errors
649 * are OOM; this is done because we know that in bus.c
650 * an OOM error disconnects the connection, which is
651 * the same thing we want on any other error.
653 dbus_error_free (&error);
657 if (!dbus_connection_set_watch_functions (connection,
658 add_connection_watch,
659 remove_connection_watch,
665 if (!dbus_connection_set_timeout_functions (connection,
666 add_connection_timeout,
667 remove_connection_timeout,
672 /* For now we don't need to set a Windows user function because
673 * there are no policies in the config file controlling what
674 * Windows users can connect. The default 'same user that owns the
675 * bus can connect' behavior of DBusConnection is fine on Windows.
677 dbus_connection_set_unix_user_function (connection,
678 allow_unix_user_function,
681 dbus_connection_set_dispatch_status_function (connection,
682 dispatch_status_function,
683 bus_context_get_loop (connections->context),
686 d->link_in_connection_list = _dbus_list_alloc_link (connection);
687 if (d->link_in_connection_list == NULL)
690 /* Setup the connection with the dispatcher */
691 if (!bus_dispatch_add_connection (connection))
694 if (dbus_connection_get_dispatch_status (connection) != DBUS_DISPATCH_COMPLETE)
696 if (!_dbus_loop_queue_dispatch (bus_context_get_loop (connections->context), connection))
698 bus_dispatch_remove_connection (connection);
703 _dbus_list_append_link (&connections->incomplete, d->link_in_connection_list);
704 connections->n_incomplete += 1;
706 dbus_connection_ref (connection);
708 /* Note that we might disconnect ourselves here, but it only takes
709 * effect on return to the main loop. We call this to free up
710 * expired connections if possible, and to queue the timeout for our
713 bus_connections_expire_incomplete (connections);
715 /* And we might also disconnect ourselves here, but again it
716 * only takes effect on return to main loop.
718 if (connections->n_incomplete >
719 bus_context_get_max_incomplete_connections (connections->context))
721 _dbus_verbose ("Number of incomplete connections exceeds max, dropping oldest one\n");
723 _dbus_assert (connections->incomplete != NULL);
724 /* Disconnect the oldest unauthenticated connection. FIXME
725 * would it be more secure to drop a *random* connection? This
726 * algorithm seems to mean that if someone can create new
727 * connections quickly enough, they can keep anyone else from
728 * completing authentication. But random may or may not really
729 * help with that, a more elaborate solution might be required.
731 dbus_connection_close (connections->incomplete->data);
740 bus_selinux_id_unref (d->selinux_id);
741 d->selinux_id = NULL;
743 if (!dbus_connection_set_watch_functions (connection,
747 _dbus_assert_not_reached ("setting watch functions to NULL failed");
749 if (!dbus_connection_set_timeout_functions (connection,
753 _dbus_assert_not_reached ("setting timeout functions to NULL failed");
755 dbus_connection_set_unix_user_function (connection,
758 dbus_connection_set_windows_user_function (connection,
761 dbus_connection_set_dispatch_status_function (connection,
764 if (d->link_in_connection_list != NULL)
766 _dbus_assert (d->link_in_connection_list->next == NULL);
767 _dbus_assert (d->link_in_connection_list->prev == NULL);
768 _dbus_list_free_link (d->link_in_connection_list);
769 d->link_in_connection_list = NULL;
772 if (!dbus_connection_set_data (connection,
773 connection_data_slot,
775 _dbus_assert_not_reached ("failed to set connection data to null");
777 /* "d" has now been freed */
784 bus_connections_expire_incomplete (BusConnections *connections)
790 if (connections->incomplete != NULL)
792 long tv_sec, tv_usec;
796 _dbus_get_current_time (&tv_sec, &tv_usec);
797 auth_timeout = bus_context_get_auth_timeout (connections->context);
799 link = _dbus_list_get_first_link (&connections->incomplete);
802 DBusList *next = _dbus_list_get_next_link (&connections->incomplete, link);
803 DBusConnection *connection;
804 BusConnectionData *d;
807 connection = link->data;
809 d = BUS_CONNECTION_DATA (connection);
811 _dbus_assert (d != NULL);
813 elapsed = ELAPSED_MILLISECONDS_SINCE (d->connection_tv_sec,
814 d->connection_tv_usec,
817 if (elapsed >= (double) auth_timeout)
819 _dbus_verbose ("Timing out authentication for connection %p\n", connection);
820 dbus_connection_close (connection);
824 /* We can end the loop, since the connections are in oldest-first order */
825 next_interval = ((double)auth_timeout) - elapsed;
826 _dbus_verbose ("Connection %p authentication expires in %d milliseconds\n",
827 connection, next_interval);
836 bus_expire_timeout_set_interval (connections->expire_timeout,
841 expire_incomplete_timeout (void *data)
843 BusConnections *connections = data;
845 _dbus_verbose ("Running\n");
847 /* note that this may remove the timeout */
848 bus_connections_expire_incomplete (connections);
854 bus_connection_get_unix_groups (DBusConnection *connection,
855 unsigned long **groups,
859 BusConnectionData *d;
862 d = BUS_CONNECTION_DATA (connection);
864 _dbus_assert (d != NULL);
869 if (dbus_connection_get_unix_user (connection, &uid))
871 if (!_dbus_unix_groups_from_uid (uid, groups, n_groups))
873 _dbus_verbose ("Did not get any groups for UID %lu\n",
879 _dbus_verbose ("Got %d groups for UID %lu\n",
885 return TRUE; /* successfully got 0 groups */
889 bus_connection_is_in_unix_group (DBusConnection *connection,
893 unsigned long *group_ids;
896 if (!bus_connection_get_unix_groups (connection, &group_ids, &n_group_ids,
901 while (i < n_group_ids)
903 if (group_ids[i] == gid)
905 dbus_free (group_ids);
911 dbus_free (group_ids);
916 bus_connection_get_loginfo (DBusConnection *connection)
918 BusConnectionData *d;
920 d = BUS_CONNECTION_DATA (connection);
922 if (!bus_connection_is_active (connection))
924 return d->cached_loginfo_string;
928 bus_connection_get_policy (DBusConnection *connection)
930 BusConnectionData *d;
932 d = BUS_CONNECTION_DATA (connection);
934 _dbus_assert (d != NULL);
935 _dbus_assert (d->policy != NULL);
941 foreach_active (BusConnections *connections,
942 BusConnectionForeachFunction function,
947 link = _dbus_list_get_first_link (&connections->completed);
950 DBusConnection *connection = link->data;
951 DBusList *next = _dbus_list_get_next_link (&connections->completed, link);
953 if (!(* function) (connection, data))
963 foreach_inactive (BusConnections *connections,
964 BusConnectionForeachFunction function,
969 link = _dbus_list_get_first_link (&connections->incomplete);
972 DBusConnection *connection = link->data;
973 DBusList *next = _dbus_list_get_next_link (&connections->incomplete, link);
975 if (!(* function) (connection, data))
985 * Calls function on each active connection; if the function returns
986 * #FALSE, stops iterating. Active connections are authenticated
987 * and have sent a Hello message.
989 * @param connections the connections object
990 * @param function the function
991 * @param data data to pass to it as a second arg
994 bus_connections_foreach_active (BusConnections *connections,
995 BusConnectionForeachFunction function,
998 foreach_active (connections, function, data);
1002 * Calls function on each connection; if the function returns
1003 * #FALSE, stops iterating.
1005 * @param connections the connections object
1006 * @param function the function
1007 * @param data data to pass to it as a second arg
1010 bus_connections_foreach (BusConnections *connections,
1011 BusConnectionForeachFunction function,
1014 if (!foreach_active (connections, function, data))
1017 foreach_inactive (connections, function, data);
1021 bus_connections_get_context (BusConnections *connections)
1023 return connections->context;
1027 * This is used to avoid covering the same connection twice when
1028 * traversing connections. Note that it assumes we will
1029 * bus_connection_mark_stamp() each connection at least once per
1030 * INT_MAX increments of the global stamp, or wraparound would break
1034 bus_connections_increment_stamp (BusConnections *connections)
1036 connections->stamp += 1;
1039 /* Mark connection with current stamp, return TRUE if it
1040 * didn't already have that stamp
1043 bus_connection_mark_stamp (DBusConnection *connection)
1045 BusConnectionData *d;
1047 d = BUS_CONNECTION_DATA (connection);
1049 _dbus_assert (d != NULL);
1051 if (d->stamp == d->connections->stamp)
1055 d->stamp = d->connections->stamp;
1061 bus_connection_get_context (DBusConnection *connection)
1063 BusConnectionData *d;
1065 d = BUS_CONNECTION_DATA (connection);
1067 _dbus_assert (d != NULL);
1069 return d->connections->context;
1073 bus_connection_get_connections (DBusConnection *connection)
1075 BusConnectionData *d;
1077 d = BUS_CONNECTION_DATA (connection);
1079 _dbus_assert (d != NULL);
1081 return d->connections;
1085 bus_connection_get_registry (DBusConnection *connection)
1087 BusConnectionData *d;
1089 d = BUS_CONNECTION_DATA (connection);
1091 _dbus_assert (d != NULL);
1093 return bus_context_get_registry (d->connections->context);
1097 bus_connection_get_activation (DBusConnection *connection)
1099 BusConnectionData *d;
1101 d = BUS_CONNECTION_DATA (connection);
1103 _dbus_assert (d != NULL);
1105 return bus_context_get_activation (d->connections->context);
1109 bus_connection_get_matchmaker (DBusConnection *connection)
1111 BusConnectionData *d;
1113 d = BUS_CONNECTION_DATA (connection);
1115 _dbus_assert (d != NULL);
1117 return bus_context_get_matchmaker (d->connections->context);
1121 bus_connection_get_selinux_id (DBusConnection *connection)
1123 BusConnectionData *d;
1125 d = BUS_CONNECTION_DATA (connection);
1127 _dbus_assert (d != NULL);
1129 return d->selinux_id;
1133 * Checks whether the connection is registered with the message bus.
1135 * @param connection the connection
1136 * @returns #TRUE if we're an active message bus participant
1139 bus_connection_is_active (DBusConnection *connection)
1141 BusConnectionData *d;
1143 d = BUS_CONNECTION_DATA (connection);
1145 return d != NULL && d->name != NULL;
1149 bus_connection_preallocate_oom_error (DBusConnection *connection)
1151 DBusMessage *message;
1152 DBusPreallocatedSend *preallocated;
1153 BusConnectionData *d;
1155 d = BUS_CONNECTION_DATA (connection);
1157 _dbus_assert (d != NULL);
1159 if (d->oom_preallocated != NULL)
1162 preallocated = dbus_connection_preallocate_send (connection);
1163 if (preallocated == NULL)
1166 message = dbus_message_new (DBUS_MESSAGE_TYPE_ERROR);
1168 if (message == NULL)
1170 dbus_connection_free_preallocated_send (connection, preallocated);
1174 /* d->name may be NULL, but that is OK */
1175 if (!dbus_message_set_error_name (message, DBUS_ERROR_NO_MEMORY) ||
1176 !dbus_message_set_destination (message, d->name) ||
1177 !dbus_message_set_sender (message,
1180 dbus_connection_free_preallocated_send (connection, preallocated);
1181 dbus_message_unref (message);
1185 /* set reply serial to placeholder value just so space is already allocated
1188 if (!dbus_message_set_reply_serial (message, 14))
1190 dbus_connection_free_preallocated_send (connection, preallocated);
1191 dbus_message_unref (message);
1195 d->oom_message = message;
1196 d->oom_preallocated = preallocated;
1202 bus_connection_send_oom_error (DBusConnection *connection,
1203 DBusMessage *in_reply_to)
1205 BusConnectionData *d;
1207 d = BUS_CONNECTION_DATA (connection);
1209 _dbus_assert (d != NULL);
1210 _dbus_assert (d->oom_message != NULL);
1212 /* should always succeed since we set it to a placeholder earlier */
1213 if (!dbus_message_set_reply_serial (d->oom_message,
1214 dbus_message_get_serial (in_reply_to)))
1215 _dbus_assert_not_reached ("Failed to set reply serial for preallocated oom message");
1217 _dbus_assert (dbus_message_get_sender (d->oom_message) != NULL);
1219 dbus_connection_send_preallocated (connection, d->oom_preallocated,
1220 d->oom_message, NULL);
1222 dbus_message_unref (d->oom_message);
1223 d->oom_message = NULL;
1224 d->oom_preallocated = NULL;
1228 bus_connection_add_match_rule_link (DBusConnection *connection,
1231 BusConnectionData *d;
1233 d = BUS_CONNECTION_DATA (connection);
1234 _dbus_assert (d != NULL);
1236 _dbus_list_append_link (&d->match_rules, link);
1238 d->n_match_rules += 1;
1242 bus_connection_add_match_rule (DBusConnection *connection,
1247 link = _dbus_list_alloc_link (rule);
1252 bus_connection_add_match_rule_link (connection, link);
1258 bus_connection_remove_match_rule (DBusConnection *connection,
1261 BusConnectionData *d;
1263 d = BUS_CONNECTION_DATA (connection);
1264 _dbus_assert (d != NULL);
1266 _dbus_list_remove_last (&d->match_rules, rule);
1268 d->n_match_rules -= 1;
1269 _dbus_assert (d->n_match_rules >= 0);
1273 bus_connection_get_n_match_rules (DBusConnection *connection)
1275 BusConnectionData *d;
1277 d = BUS_CONNECTION_DATA (connection);
1278 _dbus_assert (d != NULL);
1280 return d->n_match_rules;
1284 bus_connection_add_owned_service_link (DBusConnection *connection,
1287 BusConnectionData *d;
1289 d = BUS_CONNECTION_DATA (connection);
1290 _dbus_assert (d != NULL);
1292 _dbus_list_append_link (&d->services_owned, link);
1294 d->n_services_owned += 1;
1298 bus_connection_add_owned_service (DBusConnection *connection,
1299 BusService *service)
1303 link = _dbus_list_alloc_link (service);
1308 bus_connection_add_owned_service_link (connection, link);
1314 bus_connection_remove_owned_service (DBusConnection *connection,
1315 BusService *service)
1317 BusConnectionData *d;
1319 d = BUS_CONNECTION_DATA (connection);
1320 _dbus_assert (d != NULL);
1322 _dbus_list_remove_last (&d->services_owned, service);
1324 d->n_services_owned -= 1;
1325 _dbus_assert (d->n_services_owned >= 0);
1329 bus_connection_get_n_services_owned (DBusConnection *connection)
1331 BusConnectionData *d;
1333 d = BUS_CONNECTION_DATA (connection);
1334 _dbus_assert (d != NULL);
1336 return d->n_services_owned;
1340 bus_connection_complete (DBusConnection *connection,
1341 const DBusString *name,
1344 BusConnectionData *d;
1347 d = BUS_CONNECTION_DATA (connection);
1348 _dbus_assert (d != NULL);
1349 _dbus_assert (d->name == NULL);
1350 _dbus_assert (d->policy == NULL);
1352 _dbus_assert (!bus_connection_is_active (connection));
1354 if (!_dbus_string_copy_data (name, &d->name))
1356 BUS_SET_OOM (error);
1360 _dbus_assert (d->name != NULL);
1362 _dbus_verbose ("Name %s assigned to %p\n", d->name, connection);
1364 d->policy = bus_context_create_client_policy (d->connections->context,
1368 /* we may have a NULL policy on OOM or error getting list of
1369 * groups for a user. In the latter case we don't handle it so
1370 * well currently, as it will just keep failing over and over.
1373 if (d->policy == NULL)
1375 _dbus_verbose ("Failed to create security policy for connection %p\n",
1377 _DBUS_ASSERT_ERROR_IS_SET (error);
1378 dbus_free (d->name);
1383 if (dbus_connection_get_unix_user (connection, &uid))
1385 if (!adjust_connections_for_uid (d->connections,
1390 /* Create and cache a string which holds information about the
1391 * peer process; used for logging purposes.
1393 if (!cache_peer_loginfo_string (d, connection))
1396 /* Now the connection is active, move it between lists */
1397 _dbus_list_unlink (&d->connections->incomplete,
1398 d->link_in_connection_list);
1399 d->connections->n_incomplete -= 1;
1400 _dbus_list_append_link (&d->connections->completed,
1401 d->link_in_connection_list);
1402 d->connections->n_completed += 1;
1404 _dbus_assert (d->connections->n_incomplete >= 0);
1405 _dbus_assert (d->connections->n_completed > 0);
1407 /* See if we can remove the timeout */
1408 bus_connections_expire_incomplete (d->connections);
1410 _dbus_assert (bus_connection_is_active (connection));
1414 BUS_SET_OOM (error);
1415 dbus_free (d->name);
1418 bus_client_policy_unref (d->policy);
1424 bus_connection_get_name (DBusConnection *connection)
1426 BusConnectionData *d;
1428 d = BUS_CONNECTION_DATA (connection);
1429 _dbus_assert (d != NULL);
1435 * Check whether completing the passed-in connection would
1436 * exceed limits, and if so set error and return #FALSE
1439 bus_connections_check_limits (BusConnections *connections,
1440 DBusConnection *requesting_completion,
1443 BusConnectionData *d;
1446 d = BUS_CONNECTION_DATA (requesting_completion);
1447 _dbus_assert (d != NULL);
1449 _dbus_assert (d->name == NULL);
1451 if (connections->n_completed >=
1452 bus_context_get_max_completed_connections (connections->context))
1454 dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
1455 "The maximum number of active connections has been reached");
1459 if (dbus_connection_get_unix_user (requesting_completion, &uid))
1461 if (get_connections_for_uid (connections, uid) >=
1462 bus_context_get_max_connections_per_user (connections->context))
1464 dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
1465 "The maximum number of active connections for UID %lu has been reached",
1475 bus_pending_reply_free (BusPendingReply *pending)
1477 _dbus_verbose ("Freeing pending reply %p, replier %p receiver %p serial %u\n",
1479 pending->will_send_reply,
1480 pending->will_get_reply,
1481 pending->reply_serial);
1483 dbus_free (pending);
1487 bus_pending_reply_send_no_reply (BusConnections *connections,
1488 BusTransaction *transaction,
1489 BusPendingReply *pending)
1491 DBusMessage *message;
1492 DBusMessageIter iter;
1498 message = dbus_message_new (DBUS_MESSAGE_TYPE_ERROR);
1499 if (message == NULL)
1502 dbus_message_set_no_reply (message, TRUE);
1504 if (!dbus_message_set_reply_serial (message,
1505 pending->reply_serial))
1508 if (!dbus_message_set_error_name (message,
1509 DBUS_ERROR_NO_REPLY))
1512 errmsg = "Message did not receive a reply (timeout by message bus)";
1513 dbus_message_iter_init_append (message, &iter);
1514 if (!dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &errmsg))
1517 if (!bus_transaction_send_from_driver (transaction, pending->will_get_reply,
1524 dbus_message_unref (message);
1529 bus_pending_reply_expired (BusExpireList *list,
1533 BusPendingReply *pending = link->data;
1534 BusConnections *connections = data;
1535 BusTransaction *transaction;
1537 /* No reply is forthcoming. So nuke it if we can. If not,
1538 * leave it in the list to try expiring again later when we
1542 _dbus_verbose ("Expiring pending reply %p, replier %p receiver %p serial %u\n",
1544 pending->will_send_reply,
1545 pending->will_get_reply,
1546 pending->reply_serial);
1548 transaction = bus_transaction_new (connections->context);
1549 if (transaction == NULL)
1552 if (!bus_pending_reply_send_no_reply (connections,
1556 bus_transaction_cancel_and_free (transaction);
1560 bus_expire_list_remove_link (connections->pending_replies, link);
1562 bus_pending_reply_free (pending);
1563 bus_transaction_execute_and_free (transaction);
1569 bus_connection_drop_pending_replies (BusConnections *connections,
1570 DBusConnection *connection)
1572 /* The DBusConnection is almost 100% finalized here, so you can't
1573 * do anything with it except check for pointer equality
1577 _dbus_verbose ("Dropping pending replies that involve connection %p\n",
1580 link = bus_expire_list_get_first_link (connections->pending_replies);
1581 while (link != NULL)
1584 BusPendingReply *pending;
1586 next = bus_expire_list_get_next_link (connections->pending_replies,
1588 pending = link->data;
1590 if (pending->will_get_reply == connection)
1592 /* We don't need to track this pending reply anymore */
1594 _dbus_verbose ("Dropping pending reply %p, replier %p receiver %p serial %u\n",
1596 pending->will_send_reply,
1597 pending->will_get_reply,
1598 pending->reply_serial);
1600 bus_expire_list_remove_link (connections->pending_replies,
1602 bus_pending_reply_free (pending);
1604 else if (pending->will_send_reply == connection)
1606 /* The reply isn't going to be sent, so set things
1607 * up so it will be expired right away
1609 _dbus_verbose ("Will expire pending reply %p, replier %p receiver %p serial %u\n",
1611 pending->will_send_reply,
1612 pending->will_get_reply,
1613 pending->reply_serial);
1615 pending->will_send_reply = NULL;
1616 pending->expire_item.added_tv_sec = 0;
1617 pending->expire_item.added_tv_usec = 0;
1619 bus_expire_list_recheck_immediately (connections->pending_replies);
1629 BusPendingReply *pending;
1630 BusConnections *connections;
1631 } CancelPendingReplyData;
1634 cancel_pending_reply (void *data)
1636 CancelPendingReplyData *d = data;
1638 _dbus_verbose ("d = %p\n", d);
1640 if (!bus_expire_list_remove (d->connections->pending_replies,
1641 &d->pending->expire_item))
1642 _dbus_assert_not_reached ("pending reply did not exist to be cancelled");
1644 bus_pending_reply_free (d->pending); /* since it's been cancelled */
1648 cancel_pending_reply_data_free (void *data)
1650 CancelPendingReplyData *d = data;
1652 _dbus_verbose ("d = %p\n", d);
1654 /* d->pending should be either freed or still
1655 * in the list of pending replies (owned by someone
1663 * Record that a reply is allowed; return TRUE on success.
1666 bus_connections_expect_reply (BusConnections *connections,
1667 BusTransaction *transaction,
1668 DBusConnection *will_get_reply,
1669 DBusConnection *will_send_reply,
1670 DBusMessage *reply_to_this,
1673 BusPendingReply *pending;
1674 dbus_uint32_t reply_serial;
1676 CancelPendingReplyData *cprd;
1679 _dbus_assert (will_get_reply != NULL);
1680 _dbus_assert (will_send_reply != NULL);
1681 _dbus_assert (reply_to_this != NULL);
1683 if (dbus_message_get_no_reply (reply_to_this))
1684 return TRUE; /* we won't allow a reply, since client doesn't care for one. */
1686 reply_serial = dbus_message_get_serial (reply_to_this);
1688 link = bus_expire_list_get_first_link (connections->pending_replies);
1690 while (link != NULL)
1692 pending = link->data;
1694 if (pending->reply_serial == reply_serial &&
1695 pending->will_get_reply == will_get_reply &&
1696 pending->will_send_reply == will_send_reply)
1698 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1699 "Message has the same reply serial as a currently-outstanding existing method call");
1703 link = bus_expire_list_get_next_link (connections->pending_replies,
1705 if (pending->will_get_reply == will_get_reply)
1710 bus_context_get_max_replies_per_connection (connections->context))
1712 dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
1713 "The maximum number of pending replies per connection has been reached");
1717 pending = dbus_new0 (BusPendingReply, 1);
1718 if (pending == NULL)
1720 BUS_SET_OOM (error);
1724 #ifdef DBUS_ENABLE_VERBOSE_MODE
1725 /* so we can see a not-yet-added pending reply */
1726 pending->expire_item.added_tv_sec = 1;
1727 pending->expire_item.added_tv_usec = 1;
1730 pending->will_get_reply = will_get_reply;
1731 pending->will_send_reply = will_send_reply;
1732 pending->reply_serial = reply_serial;
1734 cprd = dbus_new0 (CancelPendingReplyData, 1);
1737 BUS_SET_OOM (error);
1738 bus_pending_reply_free (pending);
1742 if (!bus_expire_list_add (connections->pending_replies,
1743 &pending->expire_item))
1745 BUS_SET_OOM (error);
1747 bus_pending_reply_free (pending);
1751 if (!bus_transaction_add_cancel_hook (transaction,
1752 cancel_pending_reply,
1754 cancel_pending_reply_data_free))
1756 BUS_SET_OOM (error);
1757 bus_expire_list_remove (connections->pending_replies, &pending->expire_item);
1759 bus_pending_reply_free (pending);
1763 cprd->pending = pending;
1764 cprd->connections = connections;
1766 _dbus_get_current_time (&pending->expire_item.added_tv_sec,
1767 &pending->expire_item.added_tv_usec);
1769 _dbus_verbose ("Added pending reply %p, replier %p receiver %p serial %u\n",
1771 pending->will_send_reply,
1772 pending->will_get_reply,
1773 pending->reply_serial);
1781 BusConnections *connections;
1782 } CheckPendingReplyData;
1785 cancel_check_pending_reply (void *data)
1787 CheckPendingReplyData *d = data;
1789 _dbus_verbose ("d = %p\n",d);
1791 bus_expire_list_add_link (d->connections->pending_replies,
1797 check_pending_reply_data_free (void *data)
1799 CheckPendingReplyData *d = data;
1801 _dbus_verbose ("d = %p\n",d);
1803 if (d->link != NULL)
1805 BusPendingReply *pending = d->link->data;
1807 _dbus_assert (!bus_expire_list_contains_item (d->connections->pending_replies,
1808 &pending->expire_item));
1810 bus_pending_reply_free (pending);
1811 _dbus_list_free_link (d->link);
1818 * Check whether a reply is allowed, remove BusPendingReply
1819 * if so, return TRUE if so.
1822 bus_connections_check_reply (BusConnections *connections,
1823 BusTransaction *transaction,
1824 DBusConnection *sending_reply,
1825 DBusConnection *receiving_reply,
1829 CheckPendingReplyData *cprd;
1831 dbus_uint32_t reply_serial;
1833 _dbus_assert (sending_reply != NULL);
1834 _dbus_assert (receiving_reply != NULL);
1836 reply_serial = dbus_message_get_reply_serial (reply);
1838 link = bus_expire_list_get_first_link (connections->pending_replies);
1839 while (link != NULL)
1841 BusPendingReply *pending = link->data;
1843 if (pending->reply_serial == reply_serial &&
1844 pending->will_get_reply == receiving_reply &&
1845 pending->will_send_reply == sending_reply)
1847 _dbus_verbose ("Found pending reply with serial %u\n", reply_serial);
1851 link = bus_expire_list_get_next_link (connections->pending_replies,
1857 _dbus_verbose ("No pending reply expected\n");
1862 cprd = dbus_new0 (CheckPendingReplyData, 1);
1865 BUS_SET_OOM (error);
1869 if (!bus_transaction_add_cancel_hook (transaction,
1870 cancel_check_pending_reply,
1872 check_pending_reply_data_free))
1874 BUS_SET_OOM (error);
1880 cprd->connections = connections;
1882 bus_expire_list_unlink (connections->pending_replies,
1885 _dbus_assert (!bus_expire_list_contains_item (connections->pending_replies, link->data));
1893 * Note that this is fairly fragile; in particular, don't try to use
1894 * one transaction across any main loop iterations.
1899 BusTransaction *transaction;
1900 DBusMessage *message;
1901 DBusPreallocatedSend *preallocated;
1906 BusTransactionCancelFunction cancel_function;
1907 DBusFreeFunction free_data_function;
1911 struct BusTransaction
1913 DBusList *connections;
1914 BusContext *context;
1915 DBusList *cancel_hooks;
1919 message_to_send_free (DBusConnection *connection,
1920 MessageToSend *to_send)
1922 if (to_send->message)
1923 dbus_message_unref (to_send->message);
1925 if (to_send->preallocated)
1926 dbus_connection_free_preallocated_send (connection, to_send->preallocated);
1928 dbus_free (to_send);
1932 cancel_hook_cancel (void *element,
1935 CancelHook *ch = element;
1937 _dbus_verbose ("Running transaction cancel hook\n");
1939 if (ch->cancel_function)
1940 (* ch->cancel_function) (ch->data);
1944 cancel_hook_free (void *element,
1947 CancelHook *ch = element;
1949 if (ch->free_data_function)
1950 (* ch->free_data_function) (ch->data);
1956 free_cancel_hooks (BusTransaction *transaction)
1958 _dbus_list_foreach (&transaction->cancel_hooks,
1959 cancel_hook_free, NULL);
1961 _dbus_list_clear (&transaction->cancel_hooks);
1965 bus_transaction_new (BusContext *context)
1967 BusTransaction *transaction;
1969 transaction = dbus_new0 (BusTransaction, 1);
1970 if (transaction == NULL)
1973 transaction->context = context;
1979 bus_transaction_get_context (BusTransaction *transaction)
1981 return transaction->context;
1985 bus_transaction_get_connections (BusTransaction *transaction)
1987 return bus_context_get_connections (transaction->context);
1991 bus_transaction_send_from_driver (BusTransaction *transaction,
1992 DBusConnection *connection,
1993 DBusMessage *message)
1995 /* We have to set the sender to the driver, and have
1996 * to check security policy since it was not done in
1999 _dbus_verbose ("Sending %s %s %s from driver\n",
2000 dbus_message_get_interface (message) ?
2001 dbus_message_get_interface (message) : "(no interface)",
2002 dbus_message_get_member (message) ?
2003 dbus_message_get_member (message) : "(no member)",
2004 dbus_message_get_error_name (message) ?
2005 dbus_message_get_error_name (message) : "(no error name)");
2007 if (!dbus_message_set_sender (message, DBUS_SERVICE_DBUS))
2010 if (bus_connection_is_active (connection))
2012 if (!dbus_message_set_destination (message,
2013 bus_connection_get_name (connection)))
2017 /* bus driver never wants a reply */
2018 dbus_message_set_no_reply (message, TRUE);
2020 /* If security policy doesn't allow the message, we silently
2021 * eat it; the driver doesn't care about getting a reply.
2023 if (!bus_context_check_security_policy (bus_transaction_get_context (transaction),
2025 NULL, connection, connection, message, NULL))
2028 return bus_transaction_send (transaction, connection, message);
2032 bus_transaction_send (BusTransaction *transaction,
2033 DBusConnection *connection,
2034 DBusMessage *message)
2036 MessageToSend *to_send;
2037 BusConnectionData *d;
2040 _dbus_verbose (" trying to add %s interface=%s member=%s error=%s to transaction%s\n",
2041 dbus_message_get_type (message) == DBUS_MESSAGE_TYPE_ERROR ? "error" :
2042 dbus_message_get_reply_serial (message) != 0 ? "reply" :
2044 dbus_message_get_interface (message) ?
2045 dbus_message_get_interface (message) : "(unset)",
2046 dbus_message_get_member (message) ?
2047 dbus_message_get_member (message) : "(unset)",
2048 dbus_message_get_error_name (message) ?
2049 dbus_message_get_error_name (message) : "(unset)",
2050 dbus_connection_get_is_connected (connection) ?
2051 "" : " (disconnected)");
2053 _dbus_assert (dbus_message_get_sender (message) != NULL);
2055 if (!dbus_connection_get_is_connected (connection))
2056 return TRUE; /* silently ignore disconnected connections */
2058 d = BUS_CONNECTION_DATA (connection);
2059 _dbus_assert (d != NULL);
2061 to_send = dbus_new (MessageToSend, 1);
2062 if (to_send == NULL)
2067 to_send->preallocated = dbus_connection_preallocate_send (connection);
2068 if (to_send->preallocated == NULL)
2070 dbus_free (to_send);
2074 dbus_message_ref (message);
2075 to_send->message = message;
2076 to_send->transaction = transaction;
2078 _dbus_verbose ("about to prepend message\n");
2080 if (!_dbus_list_prepend (&d->transaction_messages, to_send))
2082 message_to_send_free (connection, to_send);
2086 _dbus_verbose ("prepended message\n");
2088 /* See if we already had this connection in the list
2089 * for this transaction. If we have a pending message,
2090 * then we should already be in transaction->connections
2092 link = _dbus_list_get_first_link (&d->transaction_messages);
2093 _dbus_assert (link->data == to_send);
2094 link = _dbus_list_get_next_link (&d->transaction_messages, link);
2095 while (link != NULL)
2097 MessageToSend *m = link->data;
2098 DBusList *next = _dbus_list_get_next_link (&d->transaction_messages, link);
2100 if (m->transaction == transaction)
2108 if (!_dbus_list_prepend (&transaction->connections, connection))
2110 _dbus_list_remove (&d->transaction_messages, to_send);
2111 message_to_send_free (connection, to_send);
2120 connection_cancel_transaction (DBusConnection *connection,
2121 BusTransaction *transaction)
2124 BusConnectionData *d;
2126 d = BUS_CONNECTION_DATA (connection);
2127 _dbus_assert (d != NULL);
2129 link = _dbus_list_get_first_link (&d->transaction_messages);
2130 while (link != NULL)
2132 MessageToSend *m = link->data;
2133 DBusList *next = _dbus_list_get_next_link (&d->transaction_messages, link);
2135 if (m->transaction == transaction)
2137 _dbus_list_remove_link (&d->transaction_messages,
2140 message_to_send_free (connection, m);
2148 bus_transaction_cancel_and_free (BusTransaction *transaction)
2150 DBusConnection *connection;
2152 _dbus_verbose ("TRANSACTION: cancelled\n");
2154 while ((connection = _dbus_list_pop_first (&transaction->connections)))
2155 connection_cancel_transaction (connection, transaction);
2157 _dbus_assert (transaction->connections == NULL);
2159 _dbus_list_foreach (&transaction->cancel_hooks,
2160 cancel_hook_cancel, NULL);
2162 free_cancel_hooks (transaction);
2164 dbus_free (transaction);
2168 connection_execute_transaction (DBusConnection *connection,
2169 BusTransaction *transaction)
2172 BusConnectionData *d;
2174 d = BUS_CONNECTION_DATA (connection);
2175 _dbus_assert (d != NULL);
2177 /* Send the queue in order (FIFO) */
2178 link = _dbus_list_get_last_link (&d->transaction_messages);
2179 while (link != NULL)
2181 MessageToSend *m = link->data;
2182 DBusList *prev = _dbus_list_get_prev_link (&d->transaction_messages, link);
2184 if (m->transaction == transaction)
2186 _dbus_list_remove_link (&d->transaction_messages,
2189 _dbus_assert (dbus_message_get_sender (m->message) != NULL);
2191 dbus_connection_send_preallocated (connection,
2196 m->preallocated = NULL; /* so we don't double-free it */
2198 message_to_send_free (connection, m);
2206 bus_transaction_execute_and_free (BusTransaction *transaction)
2208 /* For each connection in transaction->connections
2211 DBusConnection *connection;
2213 _dbus_verbose ("TRANSACTION: executing\n");
2215 while ((connection = _dbus_list_pop_first (&transaction->connections)))
2216 connection_execute_transaction (connection, transaction);
2218 _dbus_assert (transaction->connections == NULL);
2220 free_cancel_hooks (transaction);
2222 dbus_free (transaction);
2226 bus_connection_remove_transactions (DBusConnection *connection)
2228 MessageToSend *to_send;
2229 BusConnectionData *d;
2231 d = BUS_CONNECTION_DATA (connection);
2232 _dbus_assert (d != NULL);
2234 while ((to_send = _dbus_list_get_first (&d->transaction_messages)))
2236 /* only has an effect for the first MessageToSend listing this transaction */
2237 _dbus_list_remove (&to_send->transaction->connections,
2240 _dbus_list_remove (&d->transaction_messages, to_send);
2241 message_to_send_free (connection, to_send);
2246 * Converts the DBusError to a message reply
2249 bus_transaction_send_error_reply (BusTransaction *transaction,
2250 DBusConnection *connection,
2251 const DBusError *error,
2252 DBusMessage *in_reply_to)
2256 _dbus_assert (error != NULL);
2257 _DBUS_ASSERT_ERROR_IS_SET (error);
2259 _dbus_verbose ("Sending error reply %s \"%s\"\n",
2260 error->name, error->message);
2262 reply = dbus_message_new_error (in_reply_to,
2268 if (!bus_transaction_send_from_driver (transaction, connection, reply))
2270 dbus_message_unref (reply);
2274 dbus_message_unref (reply);
2280 bus_transaction_add_cancel_hook (BusTransaction *transaction,
2281 BusTransactionCancelFunction cancel_function,
2283 DBusFreeFunction free_data_function)
2287 ch = dbus_new (CancelHook, 1);
2291 _dbus_verbose (" adding cancel hook function = %p data = %p\n",
2292 cancel_function, data);
2294 ch->cancel_function = cancel_function;
2296 ch->free_data_function = free_data_function;
2298 /* It's important that the hooks get run in reverse order that they
2301 if (!_dbus_list_prepend (&transaction->cancel_hooks, ch))