sl@0: /* -*- mode: C; c-file-style: "gnu" -*- */
sl@0: /* connection.c  Client connections
sl@0:  *
sl@0:  * Copyright (C) 2003  Red Hat, Inc.
sl@0:  * Portion Copyright © 2008 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
sl@0:  * Licensed under the Academic Free License version 2.1
sl@0:  * 
sl@0:  * This program is free software; you can redistribute it and/or modify
sl@0:  * it under the terms of the GNU General Public License as published by
sl@0:  * the Free Software Foundation; either version 2 of the License, or
sl@0:  * (at your option) any later version.
sl@0:  *
sl@0:  * This program is distributed in the hope that it will be useful,
sl@0:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
sl@0:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
sl@0:  * GNU General Public License for more details.
sl@0:  * 
sl@0:  * You should have received a copy of the GNU General Public License
sl@0:  * along with this program; if not, write to the Free Software
sl@0:  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
sl@0:  *
sl@0:  */
sl@0: #include "connection.h"
sl@0: #include "dispatch.h"
sl@0: #include "policy.h"
sl@0: #include "services.h"
sl@0: #include "utils.h"
sl@0: #include "signals.h"
sl@0: #include "expirelist.h"
sl@0: #include "selinux.h"
sl@0: #ifndef __SYMBIAN32__
sl@0: #include <dbus/dbus-list.h>
sl@0: #include <dbus/dbus-hash.h>
sl@0: #include <dbus/dbus-timeout.h>
sl@0: #else
sl@0: #include "dbus-list.h"
sl@0: #include "dbus-hash.h"
sl@0: #include "dbus-timeout.h"
sl@0: #endif //__SYMBIAN32__
sl@0: 
sl@0: #ifdef __SYMBIAN32__
sl@0: #include "config.h"
sl@0: #endif //__SYMBIAN32__
sl@0: 
sl@0: static void bus_connection_remove_transactions (DBusConnection *connection);
sl@0: 
sl@0: typedef struct
sl@0: {
sl@0:   BusExpireItem expire_item;
sl@0: 
sl@0:   DBusConnection *will_get_reply;
sl@0:   DBusConnection *will_send_reply;
sl@0: 
sl@0:   dbus_uint32_t reply_serial;
sl@0:   
sl@0: } BusPendingReply;
sl@0: 
sl@0: struct BusConnections
sl@0: {
sl@0:   int refcount;
sl@0:   DBusList *completed;  /**< List of all completed connections */
sl@0:   int n_completed;      /**< Length of completed list */
sl@0:   DBusList *incomplete; /**< List of all not-yet-active connections */
sl@0:   int n_incomplete;     /**< Length of incomplete list */
sl@0:   BusContext *context;
sl@0:   DBusHashTable *completed_by_user; /**< Number of completed connections for each UID */
sl@0:   DBusTimeout *expire_timeout; /**< Timeout for expiring incomplete connections. */
sl@0:   int stamp;                   /**< Incrementing number */
sl@0:   BusExpireList *pending_replies; /**< List of pending replies */
sl@0: };
sl@0: 
sl@0: static dbus_int32_t connection_data_slot = -1;
sl@0: 
sl@0: typedef struct
sl@0: {
sl@0:   BusConnections *connections;
sl@0:   DBusList *link_in_connection_list;
sl@0:   DBusConnection *connection;
sl@0:   DBusList *services_owned;
sl@0:   int n_services_owned;
sl@0:   DBusList *match_rules;
sl@0:   int n_match_rules;
sl@0:   char *name;
sl@0:   DBusList *transaction_messages; /**< Stuff we need to send as part of a transaction */
sl@0:   DBusMessage *oom_message;
sl@0:   DBusPreallocatedSend *oom_preallocated;
sl@0:   BusClientPolicy *policy;
sl@0: 
sl@0:   BusSELinuxID *selinux_id;
sl@0: 
sl@0:   long connection_tv_sec;  /**< Time when we connected (seconds component) */
sl@0:   long connection_tv_usec; /**< Time when we connected (microsec component) */
sl@0:   int stamp;               /**< connections->stamp last time we were traversed */
sl@0: } BusConnectionData;
sl@0: 
sl@0: static dbus_bool_t bus_pending_reply_expired (BusExpireList *list,
sl@0:                                               DBusList      *link,
sl@0:                                               void          *data);
sl@0: 
sl@0: static void bus_connection_drop_pending_replies (BusConnections  *connections,
sl@0:                                                  DBusConnection  *connection);
sl@0: 
sl@0: static dbus_bool_t expire_incomplete_timeout (void *data);
sl@0: 
sl@0: #define BUS_CONNECTION_DATA(connection) (dbus_connection_get_data ((connection), connection_data_slot))
sl@0: 
sl@0: static DBusLoop*
sl@0: connection_get_loop (DBusConnection *connection)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0: 
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0: 
sl@0:   return bus_context_get_loop (d->connections->context);
sl@0: }
sl@0: 
sl@0: 
sl@0: static int
sl@0: get_connections_for_uid (BusConnections *connections,
sl@0:                          dbus_uid_t      uid)
sl@0: {
sl@0:   void *val;
sl@0:   int current_count;
sl@0: 
sl@0:   /* val is NULL is 0 when it isn't in the hash yet */
sl@0:   
sl@0:   val = _dbus_hash_table_lookup_ulong (connections->completed_by_user,
sl@0:                                        uid);
sl@0: 
sl@0:   current_count = _DBUS_POINTER_TO_INT (val);
sl@0: 
sl@0:   return current_count;
sl@0: }
sl@0: 
sl@0: static dbus_bool_t
sl@0: adjust_connections_for_uid (BusConnections *connections,
sl@0:                             dbus_uid_t      uid,
sl@0:                             int             adjustment)
sl@0: {
sl@0:   int current_count;
sl@0: 
sl@0:   current_count = get_connections_for_uid (connections, uid);
sl@0: 
sl@0:   _dbus_verbose ("Adjusting connection count for UID " DBUS_UID_FORMAT
sl@0:                  ": was %d adjustment %d making %d\n",
sl@0:                  uid, current_count, adjustment, current_count + adjustment);
sl@0:   
sl@0:   _dbus_assert (current_count >= 0);
sl@0:   
sl@0:   current_count += adjustment;
sl@0: 
sl@0:   _dbus_assert (current_count >= 0);
sl@0: 
sl@0:   if (current_count == 0)
sl@0:     {
sl@0:       _dbus_hash_table_remove_ulong (connections->completed_by_user, uid);
sl@0:       return TRUE;
sl@0:     }
sl@0:   else
sl@0:     {
sl@0:       dbus_bool_t retval;
sl@0:       
sl@0:       retval = _dbus_hash_table_insert_ulong (connections->completed_by_user,
sl@0:                                               uid, _DBUS_INT_TO_POINTER (current_count));
sl@0: 
sl@0:       /* only positive adjustment can fail as otherwise
sl@0:        * a hash entry should already exist
sl@0:        */
sl@0:       _dbus_assert (adjustment > 0 ||
sl@0:                     (adjustment <= 0 && retval));
sl@0: 
sl@0:       return retval;
sl@0:     }
sl@0: }
sl@0: 
sl@0: void
sl@0: bus_connection_disconnected (DBusConnection *connection)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0:   BusService *service;
sl@0:   BusMatchmaker *matchmaker;
sl@0:   
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0:   _dbus_assert (d != NULL);
sl@0: 
sl@0:   _dbus_verbose ("%s disconnected, dropping all service ownership and releasing\n",
sl@0:                  d->name ? d->name : "(inactive)");
sl@0: 
sl@0:   /* Delete our match rules */
sl@0:   if (d->n_match_rules > 0)
sl@0:     {
sl@0:       matchmaker = bus_context_get_matchmaker (d->connections->context);
sl@0:       bus_matchmaker_disconnected (matchmaker, connection);
sl@0:     }
sl@0:   
sl@0:   /* Drop any service ownership. Unfortunately, this requires
sl@0:    * memory allocation and there doesn't seem to be a good way to
sl@0:    * handle it other than sleeping; we can't "fail" the operation of
sl@0:    * disconnecting a client, and preallocating a broadcast "service is
sl@0:    * now gone" message for every client-service pair seems kind of
sl@0:    * involved.
sl@0:    */
sl@0:   while ((service = _dbus_list_get_last (&d->services_owned)))
sl@0:     {
sl@0:       BusTransaction *transaction;
sl@0:       DBusError error;
sl@0: 
sl@0:     retry:
sl@0:       
sl@0:       dbus_error_init (&error);
sl@0:         
sl@0:       while ((transaction = bus_transaction_new (d->connections->context)) == NULL)
sl@0:         _dbus_wait_for_memory ();
sl@0:         
sl@0:       if (!bus_service_remove_owner (service, connection,
sl@0:                                      transaction, &error))
sl@0:         {
sl@0:           _DBUS_ASSERT_ERROR_IS_SET (&error);
sl@0:           
sl@0:           if (dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY))
sl@0:             {
sl@0:               dbus_error_free (&error);
sl@0:               bus_transaction_cancel_and_free (transaction);
sl@0:               _dbus_wait_for_memory ();
sl@0:               goto retry;
sl@0:             }
sl@0:           else
sl@0:             {
sl@0:               _dbus_verbose ("Failed to remove service owner: %s %s\n",
sl@0:                              error.name, error.message);
sl@0:               _dbus_assert_not_reached ("Removing service owner failed for non-memory-related reason");
sl@0:             }
sl@0:         }
sl@0:         
sl@0:       bus_transaction_execute_and_free (transaction);
sl@0:     }
sl@0: 
sl@0:   bus_dispatch_remove_connection (connection);
sl@0:   
sl@0:   /* no more watching */
sl@0:   if (!dbus_connection_set_watch_functions (connection,
sl@0:                                             NULL, NULL, NULL,
sl@0:                                             connection,
sl@0:                                             NULL))
sl@0:     _dbus_assert_not_reached ("setting watch functions to NULL failed");
sl@0: 
sl@0:   if (!dbus_connection_set_timeout_functions (connection,
sl@0:                                               NULL, NULL, NULL,
sl@0:                                               connection,
sl@0:                                               NULL))
sl@0:     _dbus_assert_not_reached ("setting timeout functions to NULL failed");
sl@0:   
sl@0:   dbus_connection_set_unix_user_function (connection,
sl@0:                                           NULL, NULL, NULL);
sl@0: 
sl@0:   dbus_connection_set_dispatch_status_function (connection,
sl@0:                                                 NULL, NULL, NULL);
sl@0:   
sl@0:   bus_connection_remove_transactions (connection);
sl@0: 
sl@0:   if (d->link_in_connection_list != NULL)
sl@0:     {
sl@0:       if (d->name != NULL)
sl@0:         {
sl@0:           unsigned long uid;
sl@0:           
sl@0:           _dbus_list_remove_link (&d->connections->completed, d->link_in_connection_list);
sl@0:           d->link_in_connection_list = NULL;
sl@0:           d->connections->n_completed -= 1;
sl@0: 
sl@0:           if (dbus_connection_get_unix_user (connection, &uid))
sl@0:             {
sl@0:               if (!adjust_connections_for_uid (d->connections,
sl@0:                                                uid, -1))
sl@0:                 _dbus_assert_not_reached ("adjusting downward should never fail");
sl@0:             }
sl@0:         }
sl@0:       else
sl@0:         {
sl@0:           _dbus_list_remove_link (&d->connections->incomplete, d->link_in_connection_list);
sl@0:           d->link_in_connection_list = NULL;
sl@0:           d->connections->n_incomplete -= 1;
sl@0:         }
sl@0:       
sl@0:       _dbus_assert (d->connections->n_incomplete >= 0);
sl@0:       _dbus_assert (d->connections->n_completed >= 0);
sl@0:     }
sl@0: 
sl@0:   bus_connection_drop_pending_replies (d->connections, connection);
sl@0:   
sl@0:   /* frees "d" as side effect */
sl@0:   dbus_connection_set_data (connection,
sl@0:                             connection_data_slot,
sl@0:                             NULL, NULL);
sl@0:   
sl@0:   dbus_connection_unref (connection);
sl@0: }
sl@0: 
sl@0: static dbus_bool_t
sl@0: connection_watch_callback (DBusWatch     *watch,
sl@0:                            unsigned int   condition,
sl@0:                            void          *data)
sl@0: {
sl@0:  /* FIXME this can be done in dbus-mainloop.c
sl@0:   * if the code in activation.c for the babysitter
sl@0:   * watch handler is fixed.
sl@0:   */
sl@0:   
sl@0: #if 0
sl@0:   _dbus_verbose ("Calling handle_watch\n");
sl@0: #endif
sl@0:   return dbus_watch_handle (watch, condition);
sl@0: }
sl@0: 
sl@0: static dbus_bool_t
sl@0: add_connection_watch (DBusWatch      *watch,
sl@0:                       void           *data)
sl@0: {
sl@0:   DBusConnection *connection = data;
sl@0: 
sl@0:   return _dbus_loop_add_watch (connection_get_loop (connection),
sl@0:                                watch, connection_watch_callback, connection,
sl@0:                                NULL);
sl@0: }
sl@0: 
sl@0: static void
sl@0: remove_connection_watch (DBusWatch      *watch,
sl@0:                          void           *data)
sl@0: {
sl@0:   DBusConnection *connection = data;
sl@0:   
sl@0:   _dbus_loop_remove_watch (connection_get_loop (connection),
sl@0:                            watch, connection_watch_callback, connection);
sl@0: }
sl@0: 
sl@0: static void
sl@0: connection_timeout_callback (DBusTimeout   *timeout,
sl@0:                              void          *data)
sl@0: {
sl@0:   /* DBusConnection *connection = data; */
sl@0: 
sl@0:   /* can return FALSE on OOM but we just let it fire again later */
sl@0:   dbus_timeout_handle (timeout);
sl@0: }
sl@0: 
sl@0: static dbus_bool_t
sl@0: add_connection_timeout (DBusTimeout    *timeout,
sl@0:                         void           *data)
sl@0: {
sl@0:   DBusConnection *connection = data;
sl@0:   
sl@0:   return _dbus_loop_add_timeout (connection_get_loop (connection),
sl@0:                                  timeout, connection_timeout_callback, connection, NULL);
sl@0: }
sl@0: 
sl@0: static void
sl@0: remove_connection_timeout (DBusTimeout    *timeout,
sl@0:                            void           *data)
sl@0: {
sl@0:   DBusConnection *connection = data;
sl@0:   
sl@0:   _dbus_loop_remove_timeout (connection_get_loop (connection),
sl@0:                              timeout, connection_timeout_callback, connection);
sl@0: }
sl@0: 
sl@0: static void
sl@0: dispatch_status_function (DBusConnection    *connection,
sl@0:                           DBusDispatchStatus new_status,
sl@0:                           void              *data)
sl@0: {
sl@0:   DBusLoop *loop = data;
sl@0:   
sl@0:   if (new_status != DBUS_DISPATCH_COMPLETE)
sl@0:     {
sl@0:       while (!_dbus_loop_queue_dispatch (loop, connection))
sl@0:         _dbus_wait_for_memory ();
sl@0:     }
sl@0: }
sl@0: 
sl@0: static dbus_bool_t
sl@0: allow_user_function (DBusConnection *connection,
sl@0:                      unsigned long   uid,
sl@0:                      void           *data)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0:     
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0: 
sl@0:   _dbus_assert (d != NULL);
sl@0:   
sl@0:   return bus_context_allow_user (d->connections->context, uid);
sl@0: }
sl@0: 
sl@0: static void
sl@0: free_connection_data (void *data)
sl@0: {
sl@0:   BusConnectionData *d = data;
sl@0: 
sl@0:   /* services_owned should be NULL since we should be disconnected */
sl@0:   _dbus_assert (d->services_owned == NULL);
sl@0:   _dbus_assert (d->n_services_owned == 0);
sl@0:   /* similarly */
sl@0:   _dbus_assert (d->transaction_messages == NULL);
sl@0: 
sl@0:   if (d->oom_preallocated)
sl@0:     dbus_connection_free_preallocated_send (d->connection, d->oom_preallocated);
sl@0: 
sl@0:   if (d->oom_message)
sl@0:     dbus_message_unref (d->oom_message);
sl@0: 
sl@0:   if (d->policy)
sl@0:     bus_client_policy_unref (d->policy);
sl@0: 
sl@0:   if (d->selinux_id)
sl@0:     bus_selinux_id_unref (d->selinux_id);
sl@0:   
sl@0:   dbus_free (d->name);
sl@0:   
sl@0:   dbus_free (d);
sl@0: }
sl@0: 
sl@0: static void
sl@0: call_timeout_callback (DBusTimeout   *timeout,
sl@0:                        void          *data)
sl@0: {
sl@0:   /* can return FALSE on OOM but we just let it fire again later */
sl@0:   dbus_timeout_handle (timeout);
sl@0: }
sl@0: 
sl@0: BusConnections*
sl@0: bus_connections_new (BusContext *context)
sl@0: {
sl@0:   BusConnections *connections;
sl@0: 
sl@0:   if (!dbus_connection_allocate_data_slot (&connection_data_slot))
sl@0:     goto failed_0;
sl@0: 
sl@0:   connections = dbus_new0 (BusConnections, 1);
sl@0:   if (connections == NULL)
sl@0:     goto failed_1;
sl@0: 
sl@0:   connections->completed_by_user = _dbus_hash_table_new (DBUS_HASH_ULONG,
sl@0:                                                          NULL, NULL);
sl@0:   if (connections->completed_by_user == NULL)
sl@0:     goto failed_2;
sl@0: 
sl@0:   connections->expire_timeout = _dbus_timeout_new (100, /* irrelevant */
sl@0:                                                    expire_incomplete_timeout,
sl@0:                                                    connections, NULL);
sl@0:   if (connections->expire_timeout == NULL)
sl@0:     goto failed_3;
sl@0: 
sl@0:   _dbus_timeout_set_enabled (connections->expire_timeout, FALSE);
sl@0: 
sl@0:   connections->pending_replies = bus_expire_list_new (bus_context_get_loop (context),
sl@0:                                                       bus_context_get_reply_timeout (context),
sl@0:                                                       bus_pending_reply_expired,
sl@0:                                                       connections);
sl@0:   if (connections->pending_replies == NULL)
sl@0:     goto failed_4;
sl@0:   
sl@0:   if (!_dbus_loop_add_timeout (bus_context_get_loop (context),
sl@0:                                connections->expire_timeout,
sl@0:                                call_timeout_callback, NULL, NULL))
sl@0:     goto failed_5;
sl@0:   
sl@0:   connections->refcount = 1;
sl@0:   connections->context = context;
sl@0:   
sl@0:   return connections;
sl@0: 
sl@0:  failed_5:
sl@0:   bus_expire_list_free (connections->pending_replies);
sl@0:  failed_4:
sl@0:   _dbus_timeout_unref (connections->expire_timeout);
sl@0:  failed_3:
sl@0:   _dbus_hash_table_unref (connections->completed_by_user);
sl@0:  failed_2:
sl@0:   dbus_free (connections);
sl@0:  failed_1:
sl@0:   dbus_connection_free_data_slot (&connection_data_slot);
sl@0:  failed_0:
sl@0:   return NULL;
sl@0: }
sl@0: 
sl@0: BusConnections *
sl@0: bus_connections_ref (BusConnections *connections)
sl@0: {
sl@0:   _dbus_assert (connections->refcount > 0);
sl@0:   connections->refcount += 1;
sl@0: 
sl@0:   return connections;
sl@0: }
sl@0: 
sl@0: void
sl@0: bus_connections_unref (BusConnections *connections)
sl@0: {
sl@0:   _dbus_assert (connections->refcount > 0);
sl@0:   connections->refcount -= 1;
sl@0:   if (connections->refcount == 0)
sl@0:     {
sl@0:       /* drop all incomplete */
sl@0:       while (connections->incomplete != NULL)
sl@0:         {
sl@0:           DBusConnection *connection;
sl@0: 
sl@0:           connection = connections->incomplete->data;
sl@0: 
sl@0:           dbus_connection_ref (connection);
sl@0:           dbus_connection_close (connection);
sl@0:           bus_connection_disconnected (connection);
sl@0:           dbus_connection_unref (connection);
sl@0:         }
sl@0: 
sl@0:       _dbus_assert (connections->n_incomplete == 0);
sl@0:       
sl@0:       /* drop all real connections */
sl@0:       while (connections->completed != NULL)
sl@0:         {
sl@0:           DBusConnection *connection;
sl@0: 
sl@0:           connection = connections->completed->data;
sl@0: 
sl@0:           dbus_connection_ref (connection);
sl@0:           dbus_connection_close (connection);
sl@0:           bus_connection_disconnected (connection);
sl@0:           dbus_connection_unref (connection);
sl@0:         }
sl@0: 
sl@0:       _dbus_assert (connections->n_completed == 0);
sl@0: 
sl@0:       bus_expire_list_free (connections->pending_replies);
sl@0:       
sl@0:       _dbus_loop_remove_timeout (bus_context_get_loop (connections->context),
sl@0:                                  connections->expire_timeout,
sl@0:                                  call_timeout_callback, NULL);
sl@0:       
sl@0:       _dbus_timeout_unref (connections->expire_timeout);
sl@0:       
sl@0:       _dbus_hash_table_unref (connections->completed_by_user);
sl@0:       
sl@0:       dbus_free (connections);
sl@0: 
sl@0:       dbus_connection_free_data_slot (&connection_data_slot);
sl@0:     }
sl@0: }
sl@0: 
sl@0: dbus_bool_t
sl@0: bus_connections_setup_connection (BusConnections *connections,
sl@0:                                   DBusConnection *connection)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0:   dbus_bool_t retval;
sl@0:   DBusError error;
sl@0:   
sl@0:   d = dbus_new0 (BusConnectionData, 1);
sl@0:   
sl@0:   if (d == NULL)
sl@0:     return FALSE;
sl@0: 
sl@0:   d->connections = connections;
sl@0:   d->connection = connection;
sl@0:   
sl@0:   _dbus_get_current_time (&d->connection_tv_sec,
sl@0:                           &d->connection_tv_usec);
sl@0:   
sl@0:   _dbus_assert (connection_data_slot >= 0);
sl@0:   
sl@0:   if (!dbus_connection_set_data (connection,
sl@0:                                  connection_data_slot,
sl@0:                                  d, free_connection_data))
sl@0:     {
sl@0:       dbus_free (d);
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   dbus_connection_set_route_peer_messages (connection, TRUE);
sl@0:   
sl@0:   retval = FALSE;
sl@0: 
sl@0:   dbus_error_init (&error);
sl@0:   d->selinux_id = bus_selinux_init_connection_id (connection,
sl@0:                                                   &error);
sl@0:   if (dbus_error_is_set (&error))
sl@0:     {
sl@0:       /* This is a bit bogus because we pretend all errors
sl@0:        * are OOM; this is done because we know that in bus.c
sl@0:        * an OOM error disconnects the connection, which is
sl@0:        * the same thing we want on any other error.
sl@0:        */
sl@0:       dbus_error_free (&error);
sl@0:       goto out;
sl@0:     }
sl@0:   
sl@0:   if (!dbus_connection_set_watch_functions (connection,
sl@0:                                             add_connection_watch,
sl@0:                                             remove_connection_watch,
sl@0:                                             NULL,
sl@0:                                             connection,
sl@0:                                             NULL))
sl@0:     goto out;
sl@0:   
sl@0:   if (!dbus_connection_set_timeout_functions (connection,
sl@0:                                               add_connection_timeout,
sl@0:                                               remove_connection_timeout,
sl@0:                                               NULL,
sl@0:                                               connection, NULL))
sl@0:     goto out;
sl@0:   
sl@0:   dbus_connection_set_unix_user_function (connection,
sl@0:                                           allow_user_function,
sl@0:                                           NULL, NULL);
sl@0: 
sl@0:   dbus_connection_set_dispatch_status_function (connection,
sl@0:                                                 dispatch_status_function,
sl@0:                                                 bus_context_get_loop (connections->context),
sl@0:                                                 NULL);
sl@0: 
sl@0:   d->link_in_connection_list = _dbus_list_alloc_link (connection);
sl@0:   if (d->link_in_connection_list == NULL)
sl@0:     goto out;
sl@0:   
sl@0:   /* Setup the connection with the dispatcher */
sl@0:   if (!bus_dispatch_add_connection (connection))
sl@0:     goto out;
sl@0: 
sl@0:   if (dbus_connection_get_dispatch_status (connection) != DBUS_DISPATCH_COMPLETE)
sl@0:     {
sl@0:       if (!_dbus_loop_queue_dispatch (bus_context_get_loop (connections->context), connection))
sl@0:         {
sl@0:           bus_dispatch_remove_connection (connection);
sl@0:           goto out;
sl@0:         }
sl@0:     }
sl@0: 
sl@0:   _dbus_list_append_link (&connections->incomplete, d->link_in_connection_list);
sl@0:   connections->n_incomplete += 1;
sl@0:   
sl@0:   dbus_connection_ref (connection);
sl@0: 
sl@0:   /* Note that we might disconnect ourselves here, but it only takes
sl@0:    * effect on return to the main loop. We call this to free up
sl@0:    * expired connections if possible, and to queue the timeout for our
sl@0:    * own expiration.
sl@0:    */
sl@0:   bus_connections_expire_incomplete (connections);
sl@0:   
sl@0:   /* And we might also disconnect ourselves here, but again it
sl@0:    * only takes effect on return to main loop.
sl@0:    */
sl@0:   if (connections->n_incomplete >
sl@0:       bus_context_get_max_incomplete_connections (connections->context))
sl@0:     {
sl@0:       _dbus_verbose ("Number of incomplete connections exceeds max, dropping oldest one\n");
sl@0:       
sl@0:       _dbus_assert (connections->incomplete != NULL);
sl@0:       /* Disconnect the oldest unauthenticated connection.  FIXME
sl@0:        * would it be more secure to drop a *random* connection?  This
sl@0:        * algorithm seems to mean that if someone can create new
sl@0:        * connections quickly enough, they can keep anyone else from
sl@0:        * completing authentication. But random may or may not really
sl@0:        * help with that, a more elaborate solution might be required.
sl@0:        */
sl@0:       dbus_connection_close (connections->incomplete->data);
sl@0:     }
sl@0:   
sl@0:   retval = TRUE;
sl@0: 
sl@0:  out:
sl@0:   if (!retval)
sl@0:     {
sl@0:       if (d->selinux_id)
sl@0:         bus_selinux_id_unref (d->selinux_id);
sl@0:       d->selinux_id = NULL;
sl@0:       
sl@0:       if (!dbus_connection_set_watch_functions (connection,
sl@0:                                                 NULL, NULL, NULL,
sl@0:                                                 connection,
sl@0:                                                 NULL))
sl@0:         _dbus_assert_not_reached ("setting watch functions to NULL failed");
sl@0:       
sl@0:       if (!dbus_connection_set_timeout_functions (connection,
sl@0:                                                   NULL, NULL, NULL,
sl@0:                                                   connection,
sl@0:                                                   NULL))
sl@0:         _dbus_assert_not_reached ("setting timeout functions to NULL failed");
sl@0: 
sl@0:       dbus_connection_set_unix_user_function (connection,
sl@0:                                               NULL, NULL, NULL);
sl@0: 
sl@0:       dbus_connection_set_dispatch_status_function (connection,
sl@0:                                                     NULL, NULL, NULL);
sl@0: 
sl@0:       if (d->link_in_connection_list != NULL)
sl@0:         {
sl@0:           _dbus_assert (d->link_in_connection_list->next == NULL);
sl@0:           _dbus_assert (d->link_in_connection_list->prev == NULL);
sl@0:           _dbus_list_free_link (d->link_in_connection_list);
sl@0:           d->link_in_connection_list = NULL;
sl@0:         }
sl@0:       
sl@0:       if (!dbus_connection_set_data (connection,
sl@0:                                      connection_data_slot,
sl@0:                                      NULL, NULL))
sl@0:         _dbus_assert_not_reached ("failed to set connection data to null");
sl@0: 
sl@0:       /* "d" has now been freed */
sl@0:     }
sl@0:   
sl@0:   return retval;
sl@0: }
sl@0: 
sl@0: void
sl@0: bus_connections_expire_incomplete (BusConnections *connections)
sl@0: {    
sl@0:   int next_interval;
sl@0: 
sl@0:   next_interval = -1;
sl@0:   
sl@0:   if (connections->incomplete != NULL)
sl@0:     {
sl@0:       long tv_sec, tv_usec;
sl@0:       DBusList *link;
sl@0:       int auth_timeout;
sl@0:       
sl@0:       _dbus_get_current_time (&tv_sec, &tv_usec);
sl@0:       auth_timeout = bus_context_get_auth_timeout (connections->context);
sl@0:   
sl@0:       link = _dbus_list_get_first_link (&connections->incomplete);
sl@0:       while (link != NULL)
sl@0:         {
sl@0:           DBusList *next = _dbus_list_get_next_link (&connections->incomplete, link);
sl@0:           DBusConnection *connection;
sl@0:           BusConnectionData *d;
sl@0:           double elapsed;
sl@0:       
sl@0:           connection = link->data;
sl@0:       
sl@0:           d = BUS_CONNECTION_DATA (connection);
sl@0:       
sl@0:           _dbus_assert (d != NULL);
sl@0:       
sl@0:           elapsed = ELAPSED_MILLISECONDS_SINCE (d->connection_tv_sec,
sl@0:                                                 d->connection_tv_usec,
sl@0:                                                 tv_sec, tv_usec);
sl@0: 
sl@0:           if (elapsed >= (double) auth_timeout)
sl@0:             {
sl@0:               _dbus_verbose ("Timing out authentication for connection %p\n", connection);
sl@0:               dbus_connection_close (connection);
sl@0:             }
sl@0:           else
sl@0:             {
sl@0:               /* We can end the loop, since the connections are in oldest-first order */
sl@0:               next_interval = ((double)auth_timeout) - elapsed;
sl@0:               _dbus_verbose ("Connection %p authentication expires in %d milliseconds\n",
sl@0:                              connection, next_interval);
sl@0:           
sl@0:               break;
sl@0:             }
sl@0:       
sl@0:           link = next;
sl@0:         }
sl@0:     }
sl@0: 
sl@0:   bus_expire_timeout_set_interval (connections->expire_timeout,
sl@0:                                    next_interval);
sl@0: }
sl@0: 
sl@0: static dbus_bool_t
sl@0: expire_incomplete_timeout (void *data)
sl@0: {
sl@0:   BusConnections *connections = data;
sl@0: 
sl@0:   _dbus_verbose ("Running %s\n", _DBUS_FUNCTION_NAME);
sl@0:   
sl@0:   /* note that this may remove the timeout */
sl@0:   bus_connections_expire_incomplete (connections);
sl@0: 
sl@0:   return TRUE;
sl@0: }
sl@0: 
sl@0: dbus_bool_t
sl@0: bus_connection_get_groups  (DBusConnection   *connection,
sl@0:                             unsigned long   **groups,
sl@0:                             int              *n_groups,
sl@0:                             DBusError        *error)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0:   unsigned long uid;
sl@0:   DBusUserDatabase *user_database;
sl@0:   
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0: 
sl@0:   _dbus_assert (d != NULL);
sl@0: 
sl@0:   user_database = bus_context_get_user_database (d->connections->context);
sl@0:   
sl@0:   *groups = NULL;
sl@0:   *n_groups = 0;
sl@0: 
sl@0:   if (dbus_connection_get_unix_user (connection, &uid))
sl@0:     {
sl@0:       if (!_dbus_user_database_get_groups (user_database,
sl@0:                                            uid, groups, n_groups,
sl@0:                                            error))
sl@0:         {
sl@0:           _DBUS_ASSERT_ERROR_IS_SET (error);
sl@0:           _dbus_verbose ("Did not get any groups for UID %lu\n",
sl@0:                          uid);
sl@0:           return FALSE;
sl@0:         }
sl@0:       else
sl@0:         {
sl@0:           _dbus_verbose ("Got %d groups for UID %lu\n",
sl@0:                          *n_groups, uid);
sl@0:           return TRUE;
sl@0:         }
sl@0:     }
sl@0:   else
sl@0:     return TRUE; /* successfully got 0 groups */
sl@0: }
sl@0: 
sl@0: dbus_bool_t
sl@0: bus_connection_is_in_group (DBusConnection *connection,
sl@0:                             unsigned long   gid)
sl@0: {
sl@0:   int i;
sl@0:   unsigned long *group_ids;
sl@0:   int n_group_ids;
sl@0: 
sl@0:   if (!bus_connection_get_groups (connection, &group_ids, &n_group_ids,
sl@0:                                   NULL))
sl@0:     return FALSE;
sl@0: 
sl@0:   i = 0;
sl@0:   while (i < n_group_ids)
sl@0:     {
sl@0:       if (group_ids[i] == gid)
sl@0:         {
sl@0:           dbus_free (group_ids);
sl@0:           return TRUE;
sl@0:         }
sl@0:       ++i;
sl@0:     }
sl@0: 
sl@0:   dbus_free (group_ids);
sl@0:   return FALSE;
sl@0: }
sl@0: 
sl@0: BusClientPolicy*
sl@0: bus_connection_get_policy (DBusConnection *connection)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0:     
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0: 
sl@0:   _dbus_assert (d != NULL);
sl@0:   _dbus_assert (d->policy != NULL);
sl@0:   
sl@0:   return d->policy;
sl@0: }
sl@0: 
sl@0: static dbus_bool_t
sl@0: foreach_active (BusConnections               *connections,
sl@0:                 BusConnectionForeachFunction  function,
sl@0:                 void                         *data)
sl@0: {
sl@0:   DBusList *link;
sl@0:   
sl@0:   link = _dbus_list_get_first_link (&connections->completed);
sl@0:   while (link != NULL)
sl@0:     {
sl@0:       DBusConnection *connection = link->data;
sl@0:       DBusList *next = _dbus_list_get_next_link (&connections->completed, link);
sl@0: 
sl@0:       if (!(* function) (connection, data))
sl@0:         return FALSE;
sl@0:       
sl@0:       link = next;
sl@0:     }
sl@0: 
sl@0:   return TRUE;
sl@0: }
sl@0: 
sl@0: static dbus_bool_t
sl@0: foreach_inactive (BusConnections               *connections,
sl@0:                   BusConnectionForeachFunction  function,
sl@0:                   void                         *data)
sl@0: {
sl@0:   DBusList *link;
sl@0:   
sl@0:   link = _dbus_list_get_first_link (&connections->incomplete);
sl@0:   while (link != NULL)
sl@0:     {
sl@0:       DBusConnection *connection = link->data;
sl@0:       DBusList *next = _dbus_list_get_next_link (&connections->incomplete, link);
sl@0: 
sl@0:       if (!(* function) (connection, data))
sl@0:         return FALSE;
sl@0:       
sl@0:       link = next;
sl@0:     }
sl@0: 
sl@0:   return TRUE;
sl@0: }
sl@0: 
sl@0: /**
sl@0:  * Calls function on each active connection; if the function returns
sl@0:  * #FALSE, stops iterating. Active connections are authenticated
sl@0:  * and have sent a Hello message.
sl@0:  *
sl@0:  * @param connections the connections object
sl@0:  * @param function the function
sl@0:  * @param data data to pass to it as a second arg
sl@0:  */
sl@0: void
sl@0: bus_connections_foreach_active (BusConnections               *connections,
sl@0:                                 BusConnectionForeachFunction  function,
sl@0:                                 void                         *data)
sl@0: {
sl@0:   foreach_active (connections, function, data);
sl@0: }
sl@0: 
sl@0: /**
sl@0:  * Calls function on each connection; if the function returns
sl@0:  * #FALSE, stops iterating.
sl@0:  *
sl@0:  * @param connections the connections object
sl@0:  * @param function the function
sl@0:  * @param data data to pass to it as a second arg
sl@0:  */
sl@0: void
sl@0: bus_connections_foreach (BusConnections               *connections,
sl@0:                          BusConnectionForeachFunction  function,
sl@0:                          void                         *data)
sl@0: {
sl@0:   if (!foreach_active (connections, function, data))
sl@0:     return;
sl@0: 
sl@0:   foreach_inactive (connections, function, data);
sl@0: }
sl@0: 
sl@0: BusContext*
sl@0: bus_connections_get_context (BusConnections *connections)
sl@0: {
sl@0:   return connections->context;
sl@0: }
sl@0: 
sl@0: /*
sl@0:  * This is used to avoid covering the same connection twice when
sl@0:  * traversing connections. Note that it assumes we will
sl@0:  * bus_connection_mark_stamp() each connection at least once per
sl@0:  * INT_MAX increments of the global stamp, or wraparound would break
sl@0:  * things.
sl@0:  */
sl@0: void
sl@0: bus_connections_increment_stamp (BusConnections *connections)
sl@0: {
sl@0:   connections->stamp += 1;
sl@0: }
sl@0: 
sl@0: /* Mark connection with current stamp, return TRUE if it
sl@0:  * didn't already have that stamp
sl@0:  */
sl@0: dbus_bool_t
sl@0: bus_connection_mark_stamp (DBusConnection *connection)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0:   
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0:   
sl@0:   _dbus_assert (d != NULL);
sl@0: 
sl@0:   if (d->stamp == d->connections->stamp)
sl@0:     return FALSE;
sl@0:   else
sl@0:     {
sl@0:       d->stamp = d->connections->stamp;
sl@0:       return TRUE;
sl@0:     }
sl@0: }
sl@0: 
sl@0: BusContext*
sl@0: bus_connection_get_context (DBusConnection *connection)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0: 
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0: 
sl@0:   _dbus_assert (d != NULL);
sl@0: 
sl@0:   return d->connections->context;
sl@0: }
sl@0: 
sl@0: BusConnections*
sl@0: bus_connection_get_connections (DBusConnection *connection)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0:     
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0: 
sl@0:   _dbus_assert (d != NULL);
sl@0: 
sl@0:   return d->connections;
sl@0: }
sl@0: 
sl@0: BusRegistry*
sl@0: bus_connection_get_registry (DBusConnection *connection)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0: 
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0: 
sl@0:   _dbus_assert (d != NULL);
sl@0: 
sl@0:   return bus_context_get_registry (d->connections->context);
sl@0: }
sl@0: 
sl@0: BusActivation*
sl@0: bus_connection_get_activation (DBusConnection *connection)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0: 
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0: 
sl@0:   _dbus_assert (d != NULL);
sl@0: 
sl@0:   return bus_context_get_activation (d->connections->context);
sl@0: }
sl@0: 
sl@0: BusMatchmaker*
sl@0: bus_connection_get_matchmaker (DBusConnection *connection)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0: 
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0: 
sl@0:   _dbus_assert (d != NULL);
sl@0: 
sl@0:   return bus_context_get_matchmaker (d->connections->context);
sl@0: }
sl@0: 
sl@0: BusSELinuxID*
sl@0: bus_connection_get_selinux_id (DBusConnection *connection)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0: 
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0: 
sl@0:   _dbus_assert (d != NULL);
sl@0: 
sl@0:   return d->selinux_id;
sl@0: }
sl@0: 
sl@0: /**
sl@0:  * Checks whether the connection is registered with the message bus.
sl@0:  *
sl@0:  * @param connection the connection
sl@0:  * @returns #TRUE if we're an active message bus participant
sl@0:  */
sl@0: dbus_bool_t
sl@0: bus_connection_is_active (DBusConnection *connection)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0: 
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0:   
sl@0:   return d != NULL && d->name != NULL;
sl@0: }
sl@0: 
sl@0: dbus_bool_t
sl@0: bus_connection_preallocate_oom_error (DBusConnection *connection)
sl@0: {
sl@0:   DBusMessage *message;
sl@0:   DBusPreallocatedSend *preallocated;
sl@0:   BusConnectionData *d;
sl@0: 
sl@0:   d = BUS_CONNECTION_DATA (connection);  
sl@0: 
sl@0:   _dbus_assert (d != NULL);
sl@0: 
sl@0:   if (d->oom_preallocated != NULL)
sl@0:     return TRUE;
sl@0:   
sl@0:   preallocated = dbus_connection_preallocate_send (connection);
sl@0:   if (preallocated == NULL)
sl@0:     return FALSE;
sl@0: 
sl@0:   message = dbus_message_new (DBUS_MESSAGE_TYPE_ERROR);
sl@0: 
sl@0:   if (message == NULL)
sl@0:     {
sl@0:       dbus_connection_free_preallocated_send (connection, preallocated);
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   /* d->name may be NULL, but that is OK */
sl@0:   if (!dbus_message_set_error_name (message, DBUS_ERROR_NO_MEMORY) ||
sl@0:       !dbus_message_set_destination (message, d->name) ||
sl@0:       !dbus_message_set_sender (message,
sl@0:                                 DBUS_SERVICE_DBUS))
sl@0:     {
sl@0:       dbus_connection_free_preallocated_send (connection, preallocated);
sl@0:       dbus_message_unref (message);
sl@0:       return FALSE;
sl@0:     }
sl@0:   
sl@0:   /* set reply serial to placeholder value just so space is already allocated
sl@0:    * for it.
sl@0:    */
sl@0:   if (!dbus_message_set_reply_serial (message, 14))
sl@0:     {
sl@0:       dbus_connection_free_preallocated_send (connection, preallocated);
sl@0:       dbus_message_unref (message);
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   d->oom_message = message;
sl@0:   d->oom_preallocated = preallocated;
sl@0:   
sl@0:   return TRUE;
sl@0: }
sl@0: 
sl@0: void
sl@0: bus_connection_send_oom_error (DBusConnection *connection,
sl@0:                                DBusMessage    *in_reply_to)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0: 
sl@0:   d = BUS_CONNECTION_DATA (connection);  
sl@0: 
sl@0:   _dbus_assert (d != NULL);  
sl@0:   _dbus_assert (d->oom_message != NULL);
sl@0: 
sl@0:   /* should always succeed since we set it to a placeholder earlier */
sl@0:   if (!dbus_message_set_reply_serial (d->oom_message,
sl@0:                                       dbus_message_get_serial (in_reply_to)))
sl@0:     _dbus_assert_not_reached ("Failed to set reply serial for preallocated oom message");
sl@0: 
sl@0:   _dbus_assert (dbus_message_get_sender (d->oom_message) != NULL);
sl@0:   
sl@0:   dbus_connection_send_preallocated (connection, d->oom_preallocated,
sl@0:                                      d->oom_message, NULL);
sl@0: 
sl@0:   dbus_message_unref (d->oom_message);
sl@0:   d->oom_message = NULL;
sl@0:   d->oom_preallocated = NULL;
sl@0: }
sl@0: 
sl@0: void
sl@0: bus_connection_add_match_rule_link (DBusConnection *connection,
sl@0:                                     DBusList       *link)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0: 
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0:   _dbus_assert (d != NULL);
sl@0: 
sl@0:   _dbus_list_append_link (&d->match_rules, link);
sl@0: 
sl@0:   d->n_match_rules += 1;
sl@0: }
sl@0: 
sl@0: dbus_bool_t
sl@0: bus_connection_add_match_rule (DBusConnection *connection,
sl@0:                                BusMatchRule   *rule)
sl@0: {
sl@0:     DBusList *link;
sl@0: 
sl@0:   link = _dbus_list_alloc_link (rule);
sl@0: 
sl@0:   if (link == NULL)
sl@0:     return FALSE;
sl@0: 
sl@0:   bus_connection_add_match_rule_link (connection, link);
sl@0: 
sl@0:   return TRUE;
sl@0: }
sl@0: 
sl@0: void
sl@0: bus_connection_remove_match_rule (DBusConnection *connection,
sl@0:                                   BusMatchRule   *rule)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0: 
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0:   _dbus_assert (d != NULL);
sl@0: 
sl@0:   _dbus_list_remove_last (&d->match_rules, rule);
sl@0: 
sl@0:   d->n_match_rules -= 1;
sl@0:   _dbus_assert (d->n_match_rules >= 0);
sl@0: }
sl@0: 
sl@0: int
sl@0: bus_connection_get_n_match_rules (DBusConnection *connection)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0: 
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0:   _dbus_assert (d != NULL);
sl@0:   
sl@0:   return d->n_match_rules;
sl@0: }
sl@0: 
sl@0: void
sl@0: bus_connection_add_owned_service_link (DBusConnection *connection,
sl@0:                                        DBusList       *link)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0: 
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0:   _dbus_assert (d != NULL);
sl@0: 
sl@0:   _dbus_list_append_link (&d->services_owned, link);
sl@0: 
sl@0:   d->n_services_owned += 1;
sl@0: }
sl@0: 
sl@0: dbus_bool_t
sl@0: bus_connection_add_owned_service (DBusConnection *connection,
sl@0:                                   BusService     *service)
sl@0: {
sl@0:   DBusList *link;
sl@0: 
sl@0:   link = _dbus_list_alloc_link (service);
sl@0: 
sl@0:   if (link == NULL)
sl@0:     return FALSE;
sl@0: 
sl@0:   bus_connection_add_owned_service_link (connection, link);
sl@0: 
sl@0:   return TRUE;
sl@0: }
sl@0: 
sl@0: void
sl@0: bus_connection_remove_owned_service (DBusConnection *connection,
sl@0:                                      BusService     *service)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0: 
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0:   _dbus_assert (d != NULL);
sl@0: 
sl@0:   _dbus_list_remove_last (&d->services_owned, service);
sl@0: 
sl@0:   d->n_services_owned -= 1;
sl@0:   _dbus_assert (d->n_services_owned >= 0);
sl@0: }
sl@0: 
sl@0: int
sl@0: bus_connection_get_n_services_owned (DBusConnection *connection)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0: 
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0:   _dbus_assert (d != NULL);
sl@0:   
sl@0:   return d->n_services_owned;
sl@0: }
sl@0: 
sl@0: dbus_bool_t
sl@0: bus_connection_complete (DBusConnection   *connection,
sl@0: 			 const DBusString *name,
sl@0:                          DBusError        *error)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0:   unsigned long uid;
sl@0:   
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0:   _dbus_assert (d != NULL);
sl@0:   _dbus_assert (d->name == NULL);
sl@0:   _dbus_assert (d->policy == NULL);
sl@0: 
sl@0:   _dbus_assert (!bus_connection_is_active (connection));
sl@0:   
sl@0:   if (!_dbus_string_copy_data (name, &d->name))
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   _dbus_assert (d->name != NULL);
sl@0:   
sl@0:   _dbus_verbose ("Name %s assigned to %p\n", d->name, connection);
sl@0: 
sl@0:   d->policy = bus_context_create_client_policy (d->connections->context,
sl@0:                                                 connection,
sl@0:                                                 error);
sl@0: 
sl@0:   /* we may have a NULL policy on OOM or error getting list of
sl@0:    * groups for a user. In the latter case we don't handle it so
sl@0:    * well currently, as it will just keep failing over and over.
sl@0:    */
sl@0: 
sl@0:   if (d->policy == NULL)
sl@0:     {
sl@0:       _dbus_verbose ("Failed to create security policy for connection %p\n",
sl@0:                      connection);
sl@0:       _DBUS_ASSERT_ERROR_IS_SET (error);
sl@0:       dbus_free (d->name);
sl@0:       d->name = NULL;
sl@0:       return FALSE;
sl@0:     }
sl@0:   
sl@0:   if (dbus_connection_get_unix_user (connection, &uid))
sl@0:     {
sl@0:       if (!adjust_connections_for_uid (d->connections,
sl@0:                                        uid, 1))
sl@0:         {
sl@0:           BUS_SET_OOM (error);
sl@0:           dbus_free (d->name);
sl@0:           d->name = NULL;
sl@0:           return FALSE;
sl@0:         }
sl@0:     }
sl@0:   
sl@0:   /* Now the connection is active, move it between lists */
sl@0:   _dbus_list_unlink (&d->connections->incomplete,
sl@0:                      d->link_in_connection_list);
sl@0:   d->connections->n_incomplete -= 1;
sl@0:   _dbus_list_append_link (&d->connections->completed,
sl@0:                           d->link_in_connection_list);
sl@0:   d->connections->n_completed += 1;
sl@0: 
sl@0:   _dbus_assert (d->connections->n_incomplete >= 0);
sl@0:   _dbus_assert (d->connections->n_completed > 0);
sl@0: 
sl@0:   /* See if we can remove the timeout */
sl@0:   bus_connections_expire_incomplete (d->connections);
sl@0: 
sl@0:   _dbus_assert (bus_connection_is_active (connection));
sl@0:   
sl@0:   return TRUE;
sl@0: }
sl@0: 
sl@0: const char *
sl@0: bus_connection_get_name (DBusConnection *connection)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0:   
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0:   _dbus_assert (d != NULL);
sl@0:   
sl@0:   return d->name;
sl@0: }
sl@0: 
sl@0: /**
sl@0:  * Check whether completing the passed-in connection would
sl@0:  * exceed limits, and if so set error and return #FALSE
sl@0:  */
sl@0: dbus_bool_t
sl@0: bus_connections_check_limits (BusConnections  *connections,
sl@0:                               DBusConnection  *requesting_completion,
sl@0:                               DBusError       *error)
sl@0: {
sl@0:   BusConnectionData *d;
sl@0:   unsigned long uid;
sl@0:   
sl@0:   d = BUS_CONNECTION_DATA (requesting_completion);
sl@0:   _dbus_assert (d != NULL);
sl@0: 
sl@0:   _dbus_assert (d->name == NULL);
sl@0: 
sl@0:   if (connections->n_completed >=
sl@0:       bus_context_get_max_completed_connections (connections->context))
sl@0:     {
sl@0:       dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
sl@0:                       "The maximum number of active connections has been reached");
sl@0:       return FALSE;
sl@0:     }
sl@0:   
sl@0:   if (dbus_connection_get_unix_user (requesting_completion, &uid))
sl@0:     {
sl@0:       if (get_connections_for_uid (connections, uid) >=
sl@0:           bus_context_get_max_connections_per_user (connections->context))
sl@0:         {
sl@0:           dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
sl@0:                           "The maximum number of active connections for UID %lu has been reached",
sl@0:                           uid);
sl@0:           return FALSE;
sl@0:         }
sl@0:     }
sl@0:   
sl@0:   return TRUE;
sl@0: }
sl@0: 
sl@0: static void
sl@0: bus_pending_reply_free (BusPendingReply *pending)
sl@0: {
sl@0:   _dbus_verbose ("Freeing pending reply %p, replier %p receiver %p serial %u\n",
sl@0:                  pending,
sl@0:                  pending->will_send_reply,
sl@0:                  pending->will_get_reply,
sl@0:                  pending->reply_serial);
sl@0: 
sl@0:   dbus_free (pending);
sl@0: }
sl@0: 
sl@0: static dbus_bool_t
sl@0: bus_pending_reply_send_no_reply (BusConnections  *connections,
sl@0:                                  BusTransaction  *transaction,
sl@0:                                  BusPendingReply *pending)
sl@0: {
sl@0:   DBusMessage *message;
sl@0:   DBusMessageIter iter;
sl@0:   dbus_bool_t retval;
sl@0:   const char *errmsg;
sl@0: 
sl@0:   retval = FALSE;
sl@0:   
sl@0:   message = dbus_message_new (DBUS_MESSAGE_TYPE_ERROR);
sl@0:   if (message == NULL)
sl@0:     return FALSE;
sl@0:   
sl@0:   dbus_message_set_no_reply (message, TRUE);
sl@0:   
sl@0:   if (!dbus_message_set_reply_serial (message,
sl@0:                                       pending->reply_serial))
sl@0:     goto out;
sl@0: 
sl@0:   if (!dbus_message_set_error_name (message,
sl@0:                                     DBUS_ERROR_NO_REPLY))
sl@0:     goto out;
sl@0: 
sl@0:   errmsg = "Message did not receive a reply (timeout by message bus)";
sl@0:   dbus_message_iter_init_append (message, &iter);
sl@0:   if (!dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &errmsg))
sl@0:     goto out;
sl@0:     
sl@0:   if (!bus_transaction_send_from_driver (transaction, pending->will_get_reply,
sl@0:                                          message))
sl@0:     goto out;
sl@0: 
sl@0:   retval = TRUE;
sl@0: 
sl@0:  out:
sl@0:   dbus_message_unref (message);
sl@0:   return retval;
sl@0: }
sl@0: 
sl@0: static dbus_bool_t
sl@0: bus_pending_reply_expired (BusExpireList *list,
sl@0:                            DBusList      *link,
sl@0:                            void          *data)
sl@0: {
sl@0:   BusPendingReply *pending = link->data;
sl@0:   BusConnections *connections = data;
sl@0:   BusTransaction *transaction;
sl@0:   
sl@0:   /* No reply is forthcoming. So nuke it if we can. If not,
sl@0:    * leave it in the list to try expiring again later when we
sl@0:    * get more memory.
sl@0:    */
sl@0: 
sl@0:   _dbus_verbose ("Expiring pending reply %p, replier %p receiver %p serial %u\n",
sl@0:                  pending,
sl@0:                  pending->will_send_reply,
sl@0:                  pending->will_get_reply,
sl@0:                  pending->reply_serial);
sl@0:   
sl@0:   transaction = bus_transaction_new (connections->context);
sl@0:   if (transaction == NULL)
sl@0:     return FALSE;
sl@0:   
sl@0:   if (!bus_pending_reply_send_no_reply (connections,
sl@0:                                         transaction,
sl@0:                                         pending))
sl@0:     {
sl@0:       bus_transaction_cancel_and_free (transaction);
sl@0:       return FALSE;
sl@0:     }
sl@0:   
sl@0:   _dbus_list_remove_link (&connections->pending_replies->items,
sl@0:                           link);
sl@0:   bus_pending_reply_free (pending);
sl@0:   bus_transaction_execute_and_free (transaction);
sl@0: 
sl@0:   return TRUE;
sl@0: }
sl@0: 
sl@0: static void
sl@0: bus_connection_drop_pending_replies (BusConnections  *connections,
sl@0:                                      DBusConnection  *connection)
sl@0: {
sl@0:   /* The DBusConnection is almost 100% finalized here, so you can't
sl@0:    * do anything with it except check for pointer equality
sl@0:    */
sl@0:   DBusList *link;
sl@0: 
sl@0:   _dbus_verbose ("Dropping pending replies that involve connection %p\n",
sl@0:                  connection);
sl@0:   
sl@0:   link = _dbus_list_get_first_link (&connections->pending_replies->items);
sl@0:   while (link != NULL)
sl@0:     {
sl@0:       DBusList *next;
sl@0:       BusPendingReply *pending;
sl@0: 
sl@0:       next = _dbus_list_get_next_link (&connections->pending_replies->items,
sl@0:                                        link);
sl@0:       pending = link->data;
sl@0: 
sl@0:       if (pending->will_get_reply == connection)
sl@0:         {
sl@0:           /* We don't need to track this pending reply anymore */
sl@0: 
sl@0:           _dbus_verbose ("Dropping pending reply %p, replier %p receiver %p serial %u\n",
sl@0:                          pending,
sl@0:                          pending->will_send_reply,
sl@0:                          pending->will_get_reply,
sl@0:                          pending->reply_serial);
sl@0:           
sl@0:           _dbus_list_remove_link (&connections->pending_replies->items,
sl@0:                                   link);
sl@0:           bus_pending_reply_free (pending);
sl@0:         }
sl@0:       else if (pending->will_send_reply == connection)
sl@0:         {
sl@0:           /* The reply isn't going to be sent, so set things
sl@0:            * up so it will be expired right away
sl@0:            */
sl@0:           _dbus_verbose ("Will expire pending reply %p, replier %p receiver %p serial %u\n",
sl@0:                          pending,
sl@0:                          pending->will_send_reply,
sl@0:                          pending->will_get_reply,
sl@0:                          pending->reply_serial);
sl@0:           
sl@0:           pending->will_send_reply = NULL;
sl@0:           pending->expire_item.added_tv_sec = 0;
sl@0:           pending->expire_item.added_tv_usec = 0;
sl@0: 
sl@0:           bus_expire_timeout_set_interval (connections->pending_replies->timeout,
sl@0:                                            0);
sl@0:         }
sl@0:       
sl@0:       link = next;
sl@0:     }
sl@0: }
sl@0: 
sl@0: 
sl@0: typedef struct
sl@0: {
sl@0:   BusPendingReply *pending;
sl@0:   BusConnections  *connections;
sl@0: } CancelPendingReplyData;
sl@0: 
sl@0: static void
sl@0: cancel_pending_reply (void *data)
sl@0: {
sl@0:   CancelPendingReplyData *d = data;
sl@0: 
sl@0:   _dbus_verbose ("%s: d = %p\n", _DBUS_FUNCTION_NAME, d);
sl@0:   
sl@0:   if (!_dbus_list_remove (&d->connections->pending_replies->items,
sl@0:                           d->pending))
sl@0:     _dbus_assert_not_reached ("pending reply did not exist to be cancelled");
sl@0: 
sl@0:   bus_pending_reply_free (d->pending); /* since it's been cancelled */
sl@0: }
sl@0: 
sl@0: static void
sl@0: cancel_pending_reply_data_free (void *data)
sl@0: {
sl@0:   CancelPendingReplyData *d = data;
sl@0: 
sl@0:   _dbus_verbose ("%s: d = %p\n", _DBUS_FUNCTION_NAME, d);
sl@0:   
sl@0:   /* d->pending should be either freed or still
sl@0:    * in the list of pending replies (owned by someone
sl@0:    * else)
sl@0:    */
sl@0:   
sl@0:   dbus_free (d);
sl@0: }
sl@0: 
sl@0: /*
sl@0:  * Record that a reply is allowed; return TRUE on success.
sl@0:  */
sl@0: dbus_bool_t
sl@0: bus_connections_expect_reply (BusConnections  *connections,
sl@0:                               BusTransaction  *transaction,
sl@0:                               DBusConnection  *will_get_reply,
sl@0:                               DBusConnection  *will_send_reply,
sl@0:                               DBusMessage     *reply_to_this,
sl@0:                               DBusError       *error)
sl@0: {
sl@0:   BusPendingReply *pending;
sl@0:   dbus_uint32_t reply_serial;
sl@0:   DBusList *link;
sl@0:   CancelPendingReplyData *cprd;
sl@0:   int count;
sl@0: 
sl@0:   _dbus_assert (will_get_reply != NULL);
sl@0:   _dbus_assert (will_send_reply != NULL);
sl@0:   _dbus_assert (reply_to_this != NULL);
sl@0:   
sl@0:   if (dbus_message_get_no_reply (reply_to_this))
sl@0:     return TRUE; /* we won't allow a reply, since client doesn't care for one. */
sl@0:   
sl@0:   reply_serial = dbus_message_get_serial (reply_to_this);
sl@0: 
sl@0:   link = _dbus_list_get_first_link (&connections->pending_replies->items);
sl@0:   count = 0;
sl@0:   while (link != NULL)
sl@0:     {
sl@0:       pending = link->data;
sl@0: 
sl@0:       if (pending->reply_serial == reply_serial &&
sl@0:           pending->will_get_reply == will_get_reply &&
sl@0:           pending->will_send_reply == will_send_reply)
sl@0:         {
sl@0:           dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
sl@0:                           "Message has the same reply serial as a currently-outstanding existing method call");
sl@0:           return FALSE;
sl@0:         }
sl@0:       
sl@0:       link = _dbus_list_get_next_link (&connections->pending_replies->items,
sl@0:                                        link);
sl@0:       if (pending->will_get_reply == will_get_reply)
sl@0:         ++count;
sl@0:     }
sl@0:   
sl@0:   if (count >=
sl@0:       bus_context_get_max_replies_per_connection (connections->context))
sl@0:     {
sl@0:       dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
sl@0: 		      "The maximum number of pending replies per connection has been reached");
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   pending = dbus_new0 (BusPendingReply, 1);
sl@0:   if (pending == NULL)
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0: #ifdef DBUS_ENABLE_VERBOSE_MODE
sl@0:   /* so we can see a not-yet-added pending reply */
sl@0:   pending->expire_item.added_tv_sec = 1;
sl@0:   pending->expire_item.added_tv_usec = 1;
sl@0: #endif
sl@0: 
sl@0:   pending->will_get_reply = will_get_reply;
sl@0:   pending->will_send_reply = will_send_reply;
sl@0:   pending->reply_serial = reply_serial;
sl@0:   
sl@0:   cprd = dbus_new0 (CancelPendingReplyData, 1);
sl@0:   if (cprd == NULL)
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       bus_pending_reply_free (pending);
sl@0:       return FALSE;
sl@0:     }
sl@0:   
sl@0:   if (!_dbus_list_prepend (&connections->pending_replies->items,
sl@0:                            pending))
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       dbus_free (cprd);
sl@0:       bus_pending_reply_free (pending);
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   if (!bus_transaction_add_cancel_hook (transaction,
sl@0:                                         cancel_pending_reply,
sl@0:                                         cprd,
sl@0:                                         cancel_pending_reply_data_free))
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       _dbus_list_remove (&connections->pending_replies->items, pending);
sl@0:       dbus_free (cprd);
sl@0:       bus_pending_reply_free (pending);
sl@0:       return FALSE;
sl@0:     }
sl@0:                                         
sl@0:   cprd->pending = pending;
sl@0:   cprd->connections = connections;
sl@0:   
sl@0:   _dbus_get_current_time (&pending->expire_item.added_tv_sec,
sl@0:                           &pending->expire_item.added_tv_usec);
sl@0: 
sl@0:   _dbus_verbose ("Added pending reply %p, replier %p receiver %p serial %u\n",
sl@0:                  pending,
sl@0:                  pending->will_send_reply,
sl@0:                  pending->will_get_reply,
sl@0:                  pending->reply_serial);
sl@0:   
sl@0:   return TRUE;
sl@0: }
sl@0: 
sl@0: typedef struct
sl@0: {
sl@0:   DBusList        *link;
sl@0:   BusConnections  *connections;
sl@0: } CheckPendingReplyData;
sl@0: 
sl@0: static void
sl@0: cancel_check_pending_reply (void *data)
sl@0: {
sl@0:   CheckPendingReplyData *d = data;
sl@0: 
sl@0:   _dbus_verbose ("%s: d = %p\n", _DBUS_FUNCTION_NAME, d);
sl@0:   
sl@0:   _dbus_list_prepend_link (&d->connections->pending_replies->items,
sl@0:                            d->link);
sl@0:   d->link = NULL;
sl@0: }
sl@0: 
sl@0: static void
sl@0: check_pending_reply_data_free (void *data)
sl@0: {
sl@0:   CheckPendingReplyData *d = data;
sl@0: 
sl@0:   _dbus_verbose ("%s: d = %p\n", _DBUS_FUNCTION_NAME, d);
sl@0:   
sl@0:   if (d->link != NULL)
sl@0:     {
sl@0:       BusPendingReply *pending = d->link->data;
sl@0:       
sl@0:       _dbus_assert (_dbus_list_find_last (&d->connections->pending_replies->items,
sl@0:                                           pending) == NULL);
sl@0:       
sl@0:       bus_pending_reply_free (pending);
sl@0:       _dbus_list_free_link (d->link);
sl@0:     }
sl@0:   
sl@0:   dbus_free (d);
sl@0: }
sl@0: 
sl@0: /*
sl@0:  * Check whether a reply is allowed, remove BusPendingReply
sl@0:  * if so, return TRUE if so.
sl@0:  */
sl@0: dbus_bool_t
sl@0: bus_connections_check_reply (BusConnections *connections,
sl@0:                              BusTransaction *transaction,
sl@0:                              DBusConnection *sending_reply,
sl@0:                              DBusConnection *receiving_reply,
sl@0:                              DBusMessage    *reply,
sl@0:                              DBusError      *error)
sl@0: {
sl@0:   CheckPendingReplyData *cprd;
sl@0:   DBusList *link;
sl@0:   dbus_uint32_t reply_serial;
sl@0:   
sl@0:   _dbus_assert (sending_reply != NULL);
sl@0:   _dbus_assert (receiving_reply != NULL);
sl@0: 
sl@0:   reply_serial = dbus_message_get_reply_serial (reply);
sl@0: 
sl@0:   link = _dbus_list_get_first_link (&connections->pending_replies->items);
sl@0:   while (link != NULL)
sl@0:     {
sl@0:       BusPendingReply *pending = link->data;
sl@0: 
sl@0:       if (pending->reply_serial == reply_serial &&
sl@0:           pending->will_get_reply == receiving_reply &&
sl@0:           pending->will_send_reply == sending_reply)
sl@0:         {
sl@0:           _dbus_verbose ("Found pending reply with serial %u\n", reply_serial);
sl@0:           break;
sl@0:         }
sl@0:       
sl@0:       link = _dbus_list_get_next_link (&connections->pending_replies->items,
sl@0:                                        link);
sl@0:     }
sl@0: 
sl@0:   if (link == NULL)
sl@0:     {
sl@0:       _dbus_verbose ("No pending reply expected\n");
sl@0: 
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   cprd = dbus_new0 (CheckPendingReplyData, 1);
sl@0:   if (cprd == NULL)
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       return FALSE;
sl@0:     }
sl@0:   
sl@0:   if (!bus_transaction_add_cancel_hook (transaction,
sl@0:                                         cancel_check_pending_reply,
sl@0:                                         cprd,
sl@0:                                         check_pending_reply_data_free))
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       dbus_free (cprd);
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   cprd->link = link;
sl@0:   cprd->connections = connections;
sl@0:   
sl@0:   _dbus_list_unlink (&connections->pending_replies->items,
sl@0:                      link);
sl@0:   
sl@0:   _dbus_assert (_dbus_list_find_last (&connections->pending_replies->items,
sl@0:                                       link->data) == NULL);
sl@0: 
sl@0:   return TRUE;
sl@0: }
sl@0: 
sl@0: /*
sl@0:  * Transactions
sl@0:  *
sl@0:  * Note that this is fairly fragile; in particular, don't try to use
sl@0:  * one transaction across any main loop iterations.
sl@0:  */
sl@0: 
sl@0: typedef struct
sl@0: {
sl@0:   BusTransaction *transaction;
sl@0:   DBusMessage    *message;
sl@0:   DBusPreallocatedSend *preallocated;
sl@0: } MessageToSend;
sl@0: 
sl@0: typedef struct
sl@0: {
sl@0:   BusTransactionCancelFunction cancel_function;
sl@0:   DBusFreeFunction free_data_function;
sl@0:   void *data;
sl@0: } CancelHook;
sl@0: 
sl@0: struct BusTransaction
sl@0: {
sl@0:   DBusList *connections;
sl@0:   BusContext *context;
sl@0:   DBusList *cancel_hooks;
sl@0: };
sl@0: 
sl@0: static void
sl@0: message_to_send_free (DBusConnection *connection,
sl@0:                       MessageToSend  *to_send)
sl@0: {
sl@0:   if (to_send->message)
sl@0:     dbus_message_unref (to_send->message);
sl@0: 
sl@0:   if (to_send->preallocated)
sl@0:     dbus_connection_free_preallocated_send (connection, to_send->preallocated);
sl@0: 
sl@0:   dbus_free (to_send);
sl@0: }
sl@0: 
sl@0: static void
sl@0: cancel_hook_cancel (void *element,
sl@0:                     void *data)
sl@0: {
sl@0:   CancelHook *ch = element;
sl@0: 
sl@0:   _dbus_verbose ("Running transaction cancel hook\n");
sl@0:   
sl@0:   if (ch->cancel_function)
sl@0:     (* ch->cancel_function) (ch->data);  
sl@0: }
sl@0: 
sl@0: static void
sl@0: cancel_hook_free (void *element,
sl@0:                   void *data)
sl@0: {
sl@0:   CancelHook *ch = element;
sl@0: 
sl@0:   if (ch->free_data_function)
sl@0:     (* ch->free_data_function) (ch->data);
sl@0: 
sl@0:   dbus_free (ch);
sl@0: }
sl@0: 
sl@0: static void
sl@0: free_cancel_hooks (BusTransaction *transaction)
sl@0: {
sl@0:   _dbus_list_foreach (&transaction->cancel_hooks,
sl@0:                       cancel_hook_free, NULL);
sl@0:   
sl@0:   _dbus_list_clear (&transaction->cancel_hooks);
sl@0: }
sl@0: 
sl@0: BusTransaction*
sl@0: bus_transaction_new (BusContext *context)
sl@0: {
sl@0:   BusTransaction *transaction;
sl@0: 
sl@0:   transaction = dbus_new0 (BusTransaction, 1);
sl@0:   if (transaction == NULL)
sl@0:     return NULL;
sl@0: 
sl@0:   transaction->context = context;
sl@0:   
sl@0:   return transaction;
sl@0: }
sl@0: 
sl@0: BusContext*
sl@0: bus_transaction_get_context (BusTransaction  *transaction)
sl@0: {
sl@0:   return transaction->context;
sl@0: }
sl@0: 
sl@0: BusConnections*
sl@0: bus_transaction_get_connections (BusTransaction  *transaction)
sl@0: {
sl@0:   return bus_context_get_connections (transaction->context);
sl@0: }
sl@0: 
sl@0: dbus_bool_t
sl@0: bus_transaction_send_from_driver (BusTransaction *transaction,
sl@0:                                   DBusConnection *connection,
sl@0:                                   DBusMessage    *message)
sl@0: {
sl@0:   /* We have to set the sender to the driver, and have
sl@0:    * to check security policy since it was not done in
sl@0:    * dispatch.c
sl@0:    */
sl@0:   _dbus_verbose ("Sending %s %s %s from driver\n",
sl@0:                  dbus_message_get_interface (message) ?
sl@0:                  dbus_message_get_interface (message) : "(no interface)",
sl@0:                  dbus_message_get_member (message) ?
sl@0:                  dbus_message_get_member (message) : "(no member)",
sl@0:                  dbus_message_get_error_name (message) ?
sl@0:                  dbus_message_get_error_name (message) : "(no error name)");
sl@0:                  
sl@0:   if (!dbus_message_set_sender (message, DBUS_SERVICE_DBUS))
sl@0:     return FALSE;
sl@0: 
sl@0:   if (bus_connection_is_active (connection))
sl@0:     {
sl@0:       if (!dbus_message_set_destination (message,
sl@0:                                          bus_connection_get_name (connection)))
sl@0:         return FALSE;
sl@0:     }
sl@0:   
sl@0:   /* bus driver never wants a reply */
sl@0:   dbus_message_set_no_reply (message, TRUE);
sl@0:   
sl@0:   /* If security policy doesn't allow the message, we silently
sl@0:    * eat it; the driver doesn't care about getting a reply.
sl@0:    */
sl@0:   if (!bus_context_check_security_policy (bus_transaction_get_context (transaction),
sl@0:                                           transaction,
sl@0:                                           NULL, connection, connection, message, NULL))
sl@0:     return TRUE;
sl@0: 
sl@0:   return bus_transaction_send (transaction, connection, message);
sl@0: }
sl@0: 
sl@0: dbus_bool_t
sl@0: bus_transaction_send (BusTransaction *transaction,
sl@0:                       DBusConnection *connection,
sl@0:                       DBusMessage    *message)
sl@0: {
sl@0:   MessageToSend *to_send;
sl@0:   BusConnectionData *d;
sl@0:   DBusList *link;
sl@0: 
sl@0:   _dbus_verbose ("  trying to add %s interface=%s member=%s error=%s to transaction%s\n",
sl@0:                  dbus_message_get_type (message) == DBUS_MESSAGE_TYPE_ERROR ? "error" :
sl@0:                  dbus_message_get_reply_serial (message) != 0 ? "reply" :
sl@0:                  "message",
sl@0:                  dbus_message_get_interface (message) ?
sl@0:                  dbus_message_get_interface (message) : "(unset)",
sl@0:                  dbus_message_get_member (message) ?
sl@0:                  dbus_message_get_member (message) : "(unset)",
sl@0:                  dbus_message_get_error_name (message) ?
sl@0:                  dbus_message_get_error_name (message) : "(unset)",
sl@0:                  dbus_connection_get_is_connected (connection) ?
sl@0:                  "" : " (disconnected)");
sl@0: 
sl@0:   _dbus_assert (dbus_message_get_sender (message) != NULL);
sl@0:   
sl@0:   if (!dbus_connection_get_is_connected (connection))
sl@0:     return TRUE; /* silently ignore disconnected connections */
sl@0:   
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0:   _dbus_assert (d != NULL);
sl@0:   
sl@0:   to_send = dbus_new (MessageToSend, 1);
sl@0:   if (to_send == NULL)
sl@0:     {
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   to_send->preallocated = dbus_connection_preallocate_send (connection);
sl@0:   if (to_send->preallocated == NULL)
sl@0:     {
sl@0:       dbus_free (to_send);
sl@0:       return FALSE;
sl@0:     }  
sl@0:   
sl@0:   dbus_message_ref (message);
sl@0:   to_send->message = message;
sl@0:   to_send->transaction = transaction;
sl@0: 
sl@0:   _dbus_verbose ("about to prepend message\n");
sl@0:   
sl@0:   if (!_dbus_list_prepend (&d->transaction_messages, to_send))
sl@0:     {
sl@0:       message_to_send_free (connection, to_send);
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   _dbus_verbose ("prepended message\n");
sl@0:   
sl@0:   /* See if we already had this connection in the list
sl@0:    * for this transaction. If we have a pending message,
sl@0:    * then we should already be in transaction->connections
sl@0:    */
sl@0:   link = _dbus_list_get_first_link (&d->transaction_messages);
sl@0:   _dbus_assert (link->data == to_send);
sl@0:   link = _dbus_list_get_next_link (&d->transaction_messages, link);
sl@0:   while (link != NULL)
sl@0:     {
sl@0:       MessageToSend *m = link->data;
sl@0:       DBusList *next = _dbus_list_get_next_link (&d->transaction_messages, link);
sl@0:       
sl@0:       if (m->transaction == transaction)
sl@0:         break;
sl@0:         
sl@0:       link = next;
sl@0:     }
sl@0: 
sl@0:   if (link == NULL)
sl@0:     {
sl@0:       if (!_dbus_list_prepend (&transaction->connections, connection))
sl@0:         {
sl@0:           _dbus_list_remove (&d->transaction_messages, to_send);
sl@0:           message_to_send_free (connection, to_send);
sl@0:           return FALSE;
sl@0:         }
sl@0:     }
sl@0: 
sl@0:   return TRUE;
sl@0: }
sl@0: 
sl@0: static void
sl@0: connection_cancel_transaction (DBusConnection *connection,
sl@0:                                BusTransaction *transaction)
sl@0: {
sl@0:   DBusList *link;
sl@0:   BusConnectionData *d;
sl@0:   
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0:   _dbus_assert (d != NULL);
sl@0:   
sl@0:   link = _dbus_list_get_first_link (&d->transaction_messages);
sl@0:   while (link != NULL)
sl@0:     {
sl@0:       MessageToSend *m = link->data;
sl@0:       DBusList *next = _dbus_list_get_next_link (&d->transaction_messages, link);
sl@0:       
sl@0:       if (m->transaction == transaction)
sl@0:         {
sl@0:           _dbus_list_remove_link (&d->transaction_messages,
sl@0:                                   link);
sl@0:           
sl@0:           message_to_send_free (connection, m);
sl@0:         }
sl@0:         
sl@0:       link = next;
sl@0:     }
sl@0: }
sl@0: 
sl@0: void
sl@0: bus_transaction_cancel_and_free (BusTransaction *transaction)
sl@0: {
sl@0:   DBusConnection *connection;
sl@0: 
sl@0:   _dbus_verbose ("TRANSACTION: cancelled\n");
sl@0:   
sl@0:   while ((connection = _dbus_list_pop_first (&transaction->connections)))
sl@0:     connection_cancel_transaction (connection, transaction);
sl@0: 
sl@0:   _dbus_assert (transaction->connections == NULL);
sl@0: 
sl@0:   _dbus_list_foreach (&transaction->cancel_hooks,
sl@0:                       cancel_hook_cancel, NULL);
sl@0: 
sl@0:   free_cancel_hooks (transaction);
sl@0:   
sl@0:   dbus_free (transaction);
sl@0: }
sl@0: 
sl@0: static void
sl@0: connection_execute_transaction (DBusConnection *connection,
sl@0:                                 BusTransaction *transaction)
sl@0: {
sl@0:   DBusList *link;
sl@0:   BusConnectionData *d;
sl@0:   
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0:   _dbus_assert (d != NULL);
sl@0: 
sl@0:   /* Send the queue in order (FIFO) */
sl@0:   link = _dbus_list_get_last_link (&d->transaction_messages);
sl@0:   while (link != NULL)
sl@0:     {
sl@0:       MessageToSend *m = link->data;
sl@0:       DBusList *prev = _dbus_list_get_prev_link (&d->transaction_messages, link);
sl@0:       
sl@0:       if (m->transaction == transaction)
sl@0:         {
sl@0:           _dbus_list_remove_link (&d->transaction_messages,
sl@0:                                   link);
sl@0: 
sl@0:           _dbus_assert (dbus_message_get_sender (m->message) != NULL);
sl@0:           
sl@0:           dbus_connection_send_preallocated (connection,
sl@0:                                              m->preallocated,
sl@0:                                              m->message,
sl@0:                                              NULL);
sl@0: 
sl@0:           m->preallocated = NULL; /* so we don't double-free it */
sl@0:           
sl@0:           message_to_send_free (connection, m);
sl@0:         }
sl@0:         
sl@0:       link = prev;
sl@0:     }
sl@0: }
sl@0: 
sl@0: void
sl@0: bus_transaction_execute_and_free (BusTransaction *transaction)
sl@0: {
sl@0:   /* For each connection in transaction->connections
sl@0:    * send the messages
sl@0:    */
sl@0:   DBusConnection *connection;
sl@0: 
sl@0:   _dbus_verbose ("TRANSACTION: executing\n");
sl@0:   
sl@0:   while ((connection = _dbus_list_pop_first (&transaction->connections)))
sl@0:     connection_execute_transaction (connection, transaction);
sl@0: 
sl@0:   _dbus_assert (transaction->connections == NULL);
sl@0: 
sl@0:   free_cancel_hooks (transaction);
sl@0:   
sl@0:   dbus_free (transaction);
sl@0: }
sl@0: 
sl@0: static void
sl@0: bus_connection_remove_transactions (DBusConnection *connection)
sl@0: {
sl@0:   MessageToSend *to_send;
sl@0:   BusConnectionData *d;
sl@0:   
sl@0:   d = BUS_CONNECTION_DATA (connection);
sl@0:   _dbus_assert (d != NULL);
sl@0:   
sl@0:   while ((to_send = _dbus_list_get_first (&d->transaction_messages)))
sl@0:     {
sl@0:       /* only has an effect for the first MessageToSend listing this transaction */
sl@0:       _dbus_list_remove (&to_send->transaction->connections,
sl@0:                          connection);
sl@0: 
sl@0:       _dbus_list_remove (&d->transaction_messages, to_send);
sl@0:       message_to_send_free (connection, to_send);
sl@0:     }
sl@0: }
sl@0: 
sl@0: /**
sl@0:  * Converts the DBusError to a message reply
sl@0:  */
sl@0: dbus_bool_t
sl@0: bus_transaction_send_error_reply (BusTransaction  *transaction,
sl@0:                                   DBusConnection  *connection,
sl@0:                                   const DBusError *error,
sl@0:                                   DBusMessage     *in_reply_to)
sl@0: {
sl@0:   DBusMessage *reply;
sl@0:   
sl@0:   _dbus_assert (error != NULL);
sl@0:   _DBUS_ASSERT_ERROR_IS_SET (error);
sl@0:   
sl@0:   _dbus_verbose ("Sending error reply %s \"%s\"\n",
sl@0:                  error->name, error->message);
sl@0: 
sl@0:   reply = dbus_message_new_error (in_reply_to,
sl@0:                                   error->name,
sl@0:                                   error->message);
sl@0:   if (reply == NULL)
sl@0:     return FALSE;
sl@0: 
sl@0:   if (!bus_transaction_send_from_driver (transaction, connection, reply))
sl@0:     {
sl@0:       dbus_message_unref (reply);
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   dbus_message_unref (reply);
sl@0:   
sl@0:   return TRUE;
sl@0: }
sl@0: 
sl@0: dbus_bool_t
sl@0: bus_transaction_add_cancel_hook (BusTransaction               *transaction,
sl@0:                                  BusTransactionCancelFunction  cancel_function,
sl@0:                                  void                         *data,
sl@0:                                  DBusFreeFunction              free_data_function)
sl@0: {
sl@0:   CancelHook *ch;
sl@0: 
sl@0:   ch = dbus_new (CancelHook, 1);
sl@0:   if (ch == NULL)
sl@0:     return FALSE;
sl@0: 
sl@0:   _dbus_verbose ("     adding cancel hook function = %p data = %p\n",
sl@0:                  cancel_function, data);
sl@0:   
sl@0:   ch->cancel_function = cancel_function;
sl@0:   ch->data = data;
sl@0:   ch->free_data_function = free_data_function;
sl@0: 
sl@0:   /* It's important that the hooks get run in reverse order that they
sl@0:    * were added
sl@0:    */
sl@0:   if (!_dbus_list_prepend (&transaction->cancel_hooks, ch))
sl@0:     {
sl@0:       dbus_free (ch);
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   return TRUE;
sl@0: }