sl@0: /* -*- mode: C; c-file-style: "gnu" -*- */
sl@0: /* bus.c  message bus context object
sl@0:  *
sl@0:  * Copyright (C) 2003, 2004 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: 
sl@0: #include "bus.h"
sl@0: #include "activation.h"
sl@0: #include "connection.h"
sl@0: #include "services.h"
sl@0: #include "utils.h"
sl@0: #include "policy.h"
sl@0: #include "config-parser.h"
sl@0: #include "signals.h"
sl@0: #include "selinux.h"
sl@0: #include "dir-watch.h"
sl@0: #ifndef __SYMBIAN32__
sl@0: #include <dbus/dbus-list.h>
sl@0: #include <dbus/dbus-hash.h>
sl@0: #include <dbus/dbus-internals.h>
sl@0: #else
sl@0: #include "dbus-list.h"
sl@0: #include "dbus-hash.h"
sl@0: #include "dbus-internals.h"
sl@0: #endif
sl@0: 
sl@0: struct BusContext
sl@0: {
sl@0:   int refcount;
sl@0:   char *config_file;
sl@0:   char *type;
sl@0:   char *address;
sl@0:   char *pidfile;
sl@0:   char *user;
sl@0:   DBusLoop *loop;
sl@0:   DBusList *servers;
sl@0:   BusConnections *connections;
sl@0:   BusActivation *activation;
sl@0:   BusRegistry *registry;
sl@0:   BusPolicy *policy;
sl@0:   BusMatchmaker *matchmaker;
sl@0:   DBusUserDatabase *user_database;
sl@0:   BusLimits limits;
sl@0:   unsigned int fork : 1;
sl@0: };
sl@0: 
sl@0: static dbus_int32_t server_data_slot = -1;
sl@0: 
sl@0: typedef struct
sl@0: {
sl@0:   BusContext *context;
sl@0: } BusServerData;
sl@0: 
sl@0: #define BUS_SERVER_DATA(server) (dbus_server_get_data ((server), server_data_slot))
sl@0: 
sl@0: static BusContext*
sl@0: server_get_context (DBusServer *server)
sl@0: {
sl@0:   BusContext *context;
sl@0:   BusServerData *bd;
sl@0:   
sl@0:   if (!dbus_server_allocate_data_slot (&server_data_slot))
sl@0:     return NULL;
sl@0: 
sl@0:   bd = BUS_SERVER_DATA (server);
sl@0:   if (bd == NULL)
sl@0:     {
sl@0:       dbus_server_free_data_slot (&server_data_slot);
sl@0:       return NULL;
sl@0:     }
sl@0: 
sl@0:   context = bd->context;
sl@0: 
sl@0:   dbus_server_free_data_slot (&server_data_slot);
sl@0: 
sl@0:   return context;
sl@0: }
sl@0: 
sl@0: static dbus_bool_t
sl@0: server_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:   return dbus_watch_handle (watch, condition);
sl@0: }
sl@0: 
sl@0: static dbus_bool_t
sl@0: add_server_watch (DBusWatch  *watch,
sl@0:                   void       *data)
sl@0: {
sl@0:   DBusServer *server = data;
sl@0:   BusContext *context;
sl@0:   
sl@0:   context = server_get_context (server);
sl@0:   
sl@0:   return _dbus_loop_add_watch (context->loop,
sl@0:                                watch, server_watch_callback, server,
sl@0:                                NULL);
sl@0: }
sl@0: 
sl@0: static void
sl@0: remove_server_watch (DBusWatch  *watch,
sl@0:                      void       *data)
sl@0: {
sl@0:   DBusServer *server = data;
sl@0:   BusContext *context;
sl@0:   
sl@0:   context = server_get_context (server);
sl@0:   
sl@0:   _dbus_loop_remove_watch (context->loop,
sl@0:                            watch, server_watch_callback, server);
sl@0: }
sl@0: 
sl@0: 
sl@0: static void
sl@0: server_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: static dbus_bool_t
sl@0: add_server_timeout (DBusTimeout *timeout,
sl@0:                     void        *data)
sl@0: {
sl@0:   DBusServer *server = data;
sl@0:   BusContext *context;
sl@0:   
sl@0:   context = server_get_context (server);
sl@0: 
sl@0:   return _dbus_loop_add_timeout (context->loop,
sl@0:                                  timeout, server_timeout_callback, server, NULL);
sl@0: }
sl@0: 
sl@0: static void
sl@0: remove_server_timeout (DBusTimeout *timeout,
sl@0:                        void        *data)
sl@0: {
sl@0:   DBusServer *server = data;
sl@0:   BusContext *context;
sl@0:   
sl@0:   context = server_get_context (server);
sl@0:   
sl@0:   _dbus_loop_remove_timeout (context->loop,
sl@0:                              timeout, server_timeout_callback, server);
sl@0: }
sl@0: 
sl@0: static void
sl@0: new_connection_callback (DBusServer     *server,
sl@0:                          DBusConnection *new_connection,
sl@0:                          void           *data)
sl@0: {
sl@0:   BusContext *context = data;
sl@0:   
sl@0:   if (!bus_connections_setup_connection (context->connections, new_connection))
sl@0:     {
sl@0:       _dbus_verbose ("No memory to setup new connection\n");
sl@0: 
sl@0:       /* if we don't do this, it will get unref'd without
sl@0:        * being disconnected... kind of strange really
sl@0:        * that we have to do this, people won't get it right
sl@0:        * in general.
sl@0:        */
sl@0:       dbus_connection_close (new_connection);
sl@0:     }
sl@0: 
sl@0:   dbus_connection_set_max_received_size (new_connection,
sl@0:                                          context->limits.max_incoming_bytes);
sl@0: 
sl@0:   dbus_connection_set_max_message_size (new_connection,
sl@0:                                         context->limits.max_message_size);
sl@0:   
sl@0:   /* on OOM, we won't have ref'd the connection so it will die. */
sl@0: }
sl@0: 
sl@0: static void
sl@0: free_server_data (void *data)
sl@0: {
sl@0:   BusServerData *bd = data;  
sl@0:   
sl@0:   dbus_free (bd);
sl@0: }
sl@0: 
sl@0: static dbus_bool_t
sl@0: setup_server (BusContext *context,
sl@0:               DBusServer *server,
sl@0:               char      **auth_mechanisms,
sl@0:               DBusError  *error)
sl@0: {
sl@0:   BusServerData *bd;
sl@0: 
sl@0:   bd = dbus_new0 (BusServerData, 1);
sl@0:   if (!dbus_server_set_data (server,
sl@0:                              server_data_slot,
sl@0:                              bd, free_server_data))
sl@0:     {
sl@0:       dbus_free (bd);
sl@0:       BUS_SET_OOM (error);
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   bd->context = context;
sl@0:   
sl@0:   if (!dbus_server_set_auth_mechanisms (server, (const char**) auth_mechanisms))
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       return FALSE;
sl@0:     }
sl@0:   
sl@0:   dbus_server_set_new_connection_function (server,
sl@0:                                            new_connection_callback,
sl@0:                                            context, NULL);
sl@0:   
sl@0:   if (!dbus_server_set_watch_functions (server,
sl@0:                                         add_server_watch,
sl@0:                                         remove_server_watch,
sl@0:                                         NULL,
sl@0:                                         server,
sl@0:                                         NULL))
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   if (!dbus_server_set_timeout_functions (server,
sl@0:                                           add_server_timeout,
sl@0:                                           remove_server_timeout,
sl@0:                                           NULL,
sl@0:                                           server, NULL))
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       return FALSE;
sl@0:     }
sl@0:   
sl@0:   return TRUE;
sl@0: }
sl@0: 
sl@0: /* This code only gets executed the first time the
sl@0:    config files are parsed.  It is not executed
sl@0:    when config files are reloaded.*/
sl@0: static dbus_bool_t
sl@0: process_config_first_time_only (BusContext      *context,
sl@0: 				BusConfigParser *parser,
sl@0: 				DBusError       *error)
sl@0: {
sl@0:   DBusList *link;
sl@0:   DBusList **addresses;
sl@0:   const char *user, *pidfile;
sl@0:   char **auth_mechanisms;
sl@0:   DBusList **auth_mechanisms_list;
sl@0:   int len;
sl@0:   dbus_bool_t retval;
sl@0: 
sl@0:   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
sl@0: 
sl@0:   retval = FALSE;
sl@0:   auth_mechanisms = NULL;
sl@0: 
sl@0:   /* Check for an existing pid file. Of course this is a race;
sl@0:    * we'd have to use fcntl() locks on the pid file to
sl@0:    * avoid that. But we want to check for the pid file
sl@0:    * before overwriting any existing sockets, etc.
sl@0:    */
sl@0:   pidfile = bus_config_parser_get_pidfile (parser);
sl@0:   if (pidfile != NULL)
sl@0:     {
sl@0:       DBusString u;
sl@0:       DBusStat stbuf;
sl@0:       
sl@0:       _dbus_string_init_const (&u, pidfile);
sl@0:       
sl@0:       if (_dbus_stat (&u, &stbuf, NULL))
sl@0: 	{
sl@0: 	  dbus_set_error (error, DBUS_ERROR_FAILED,
sl@0: 			  "The pid file \"%s\" exists, if the message bus is not running, remove this file",
sl@0: 			  pidfile);
sl@0: 	  goto failed;
sl@0: 	}
sl@0:     }
sl@0:   
sl@0:   /* keep around the pid filename so we can delete it later */
sl@0:   context->pidfile = _dbus_strdup (pidfile);
sl@0: 
sl@0:   /* Build an array of auth mechanisms */
sl@0:   
sl@0:   auth_mechanisms_list = bus_config_parser_get_mechanisms (parser);
sl@0:   len = _dbus_list_get_length (auth_mechanisms_list);
sl@0: 
sl@0:   if (len > 0)
sl@0:     {
sl@0:       int i;
sl@0: 
sl@0:       auth_mechanisms = dbus_new0 (char*, len + 1);
sl@0:       if (auth_mechanisms == NULL)
sl@0: 	{
sl@0: 	  BUS_SET_OOM (error);
sl@0: 	  goto failed;
sl@0: 	}
sl@0:       
sl@0:       i = 0;
sl@0:       link = _dbus_list_get_first_link (auth_mechanisms_list);
sl@0:       while (link != NULL)
sl@0:         {
sl@0:           auth_mechanisms[i] = _dbus_strdup (link->data);
sl@0:           if (auth_mechanisms[i] == NULL)
sl@0: 	    {
sl@0: 	      BUS_SET_OOM (error);
sl@0: 	      goto failed;
sl@0: 	    }
sl@0:           link = _dbus_list_get_next_link (auth_mechanisms_list, link);
sl@0:         }
sl@0:     }
sl@0:   else
sl@0:     {
sl@0:       auth_mechanisms = NULL;
sl@0:     }
sl@0: 
sl@0:   /* Listen on our addresses */
sl@0:   
sl@0:   addresses = bus_config_parser_get_addresses (parser);  
sl@0:   
sl@0:   link = _dbus_list_get_first_link (addresses);
sl@0:   while (link != NULL)
sl@0:     {
sl@0:       DBusServer *server;
sl@0:       
sl@0:       server = dbus_server_listen (link->data, error);
sl@0:       if (server == NULL)
sl@0: 	{
sl@0: 	  _DBUS_ASSERT_ERROR_IS_SET (error);
sl@0: 	  goto failed;
sl@0: 	}
sl@0:       else if (!setup_server (context, server, auth_mechanisms, error))
sl@0: 	{
sl@0: 	  _DBUS_ASSERT_ERROR_IS_SET (error);
sl@0: 	  goto failed;
sl@0: 	}
sl@0: 
sl@0:       if (!_dbus_list_append (&context->servers, server))
sl@0:         {
sl@0:           BUS_SET_OOM (error);
sl@0:           goto failed;
sl@0:         }          
sl@0:       
sl@0:       link = _dbus_list_get_next_link (addresses, link);
sl@0:     }
sl@0: 
sl@0:   /* note that type may be NULL */
sl@0:   context->type = _dbus_strdup (bus_config_parser_get_type (parser));
sl@0:   if (bus_config_parser_get_type (parser) != NULL && context->type == NULL)
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       goto failed;
sl@0:     }
sl@0: 
sl@0:   user = bus_config_parser_get_user (parser);
sl@0:   if (user != NULL)
sl@0:     {
sl@0:       context->user = _dbus_strdup (user);
sl@0:       if (context->user == NULL)
sl@0: 	{
sl@0: 	  BUS_SET_OOM (error);
sl@0: 	  goto failed;
sl@0: 	}
sl@0:     }
sl@0: 
sl@0:   context->fork = bus_config_parser_get_fork (parser);
sl@0:   
sl@0:   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
sl@0:   retval = TRUE;
sl@0: 
sl@0:  failed:
sl@0:   dbus_free_string_array (auth_mechanisms);
sl@0:   return retval;
sl@0: }
sl@0: 
sl@0: /* This code gets executed every time the config files
sl@0:    are parsed: both during BusContext construction
sl@0:    and on reloads. */
sl@0: static dbus_bool_t
sl@0: process_config_every_time (BusContext      *context,
sl@0: 			   BusConfigParser *parser,
sl@0: 			   dbus_bool_t      is_reload,
sl@0: 			   DBusError       *error)
sl@0: {
sl@0:   DBusString full_address;
sl@0:   DBusList *link;
sl@0:   char *addr;
sl@0: 
sl@0:   dbus_bool_t retval;
sl@0: 
sl@0:   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
sl@0: 
sl@0:   addr = NULL;
sl@0:   retval = FALSE;
sl@0: 
sl@0:   if (!_dbus_string_init (&full_address))
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   /* get our limits and timeout lengths */
sl@0:   bus_config_parser_get_limits (parser, &context->limits);
sl@0: 
sl@0:   context->policy = bus_config_parser_steal_policy (parser);
sl@0:   _dbus_assert (context->policy != NULL);
sl@0: 
sl@0:   /* We have to build the address backward, so that
sl@0:    * <listen> later in the config file have priority
sl@0:    */
sl@0:   link = _dbus_list_get_last_link (&context->servers);
sl@0:   while (link != NULL)
sl@0:     {
sl@0:       addr = dbus_server_get_address (link->data);
sl@0:       if (addr == NULL)
sl@0:         {
sl@0:           BUS_SET_OOM (error);
sl@0:           goto failed;
sl@0:         }
sl@0: 
sl@0:       if (_dbus_string_get_length (&full_address) > 0)
sl@0:         {
sl@0:           if (!_dbus_string_append (&full_address, ";"))
sl@0:             {
sl@0:               BUS_SET_OOM (error);
sl@0:               goto failed;
sl@0:             }
sl@0:         }
sl@0: 
sl@0:       if (!_dbus_string_append (&full_address, addr))
sl@0:         {
sl@0:           BUS_SET_OOM (error);
sl@0:           goto failed;
sl@0:         }
sl@0: 
sl@0:       dbus_free (addr);
sl@0:       addr = NULL;
sl@0: 
sl@0:       link = _dbus_list_get_prev_link (&context->servers, link);
sl@0:     }
sl@0: 
sl@0:   if (is_reload)
sl@0:     dbus_free (context->address);
sl@0: 
sl@0:   if (!_dbus_string_copy_data (&full_address, &context->address))
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       goto failed;
sl@0:     }
sl@0: 
sl@0:   /* Create activation subsystem */
sl@0:   
sl@0:   if (is_reload)
sl@0:     bus_activation_unref (context->activation);
sl@0:   
sl@0:   context->activation = bus_activation_new (context, &full_address,
sl@0:                                             bus_config_parser_get_service_dirs (parser),
sl@0:                                             error);
sl@0:   if (context->activation == NULL)
sl@0:     {
sl@0:       _DBUS_ASSERT_ERROR_IS_SET (error);
sl@0:       goto failed;
sl@0:     }
sl@0: 
sl@0:   /* Drop existing conf-dir watches (if applicable) */
sl@0: 
sl@0:   if (is_reload)
sl@0:     bus_drop_all_directory_watches ();
sl@0: 
sl@0:   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
sl@0:   retval = TRUE;
sl@0: 
sl@0:  failed:
sl@0:   _dbus_string_free (&full_address);
sl@0:   
sl@0:   if (addr)
sl@0:     dbus_free (addr);
sl@0: 
sl@0:   return retval;
sl@0: }
sl@0: 
sl@0: static dbus_bool_t
sl@0: process_config_postinit (BusContext      *context,
sl@0: 			 BusConfigParser *parser,
sl@0: 			 DBusError       *error)
sl@0: {
sl@0:   DBusHashTable *service_context_table;
sl@0: 
sl@0:   service_context_table = bus_config_parser_steal_service_context_table (parser);
sl@0:   if (!bus_registry_set_service_context_table (context->registry,
sl@0: 					       service_context_table))
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   _dbus_hash_table_unref (service_context_table);
sl@0: 
sl@0:   /* Watch all conf directories */
sl@0:   _dbus_list_foreach (bus_config_parser_get_conf_dirs (parser),
sl@0: 		      (DBusForeachFunction) bus_watch_directory,
sl@0: 		      context);
sl@0: 
sl@0:   return TRUE;
sl@0: }
sl@0: 
sl@0: BusContext*
sl@0: bus_context_new (const DBusString *config_file,
sl@0:                  ForceForkSetting  force_fork,
sl@0:                  int               print_addr_fd,
sl@0:                  int               print_pid_fd,
sl@0:                  DBusError        *error)
sl@0: {
sl@0:   BusContext *context;
sl@0:   BusConfigParser *parser;
sl@0:   DBusCredentials creds;
sl@0: 
sl@0:   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
sl@0: 
sl@0:   context = NULL;
sl@0:   parser = NULL;
sl@0: 
sl@0:   if (!dbus_server_allocate_data_slot (&server_data_slot))
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       return NULL;
sl@0:     }
sl@0: 
sl@0:   context = dbus_new0 (BusContext, 1);
sl@0:   if (context == NULL)
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       goto failed;
sl@0:     }
sl@0:   context->refcount = 1;
sl@0: 
sl@0:   if (!_dbus_string_copy_data (config_file, &context->config_file))
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       goto failed;
sl@0:     }
sl@0: 
sl@0:   context->loop = _dbus_loop_new ();
sl@0:   if (context->loop == NULL)
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       goto failed;
sl@0:     }
sl@0: 
sl@0:   context->registry = bus_registry_new (context);
sl@0:   if (context->registry == NULL)
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       goto failed;
sl@0:     }
sl@0: 
sl@0:   parser = bus_config_load (config_file, TRUE, NULL, error);
sl@0:   if (parser == NULL)
sl@0:     {
sl@0:       _DBUS_ASSERT_ERROR_IS_SET (error);
sl@0:       goto failed;
sl@0:     }
sl@0:   
sl@0:   if (!process_config_first_time_only (context, parser, error))
sl@0:     {
sl@0:       _DBUS_ASSERT_ERROR_IS_SET (error);
sl@0:       goto failed;
sl@0:     }
sl@0:   if (!process_config_every_time (context, parser, FALSE, error))
sl@0:     {
sl@0:       _DBUS_ASSERT_ERROR_IS_SET (error);
sl@0:       goto failed;
sl@0:     }
sl@0:   
sl@0:   /* we need another ref of the server data slot for the context
sl@0:    * to own
sl@0:    */
sl@0:   if (!dbus_server_allocate_data_slot (&server_data_slot))
sl@0:     _dbus_assert_not_reached ("second ref of server data slot failed");
sl@0: 
sl@0:   context->user_database = _dbus_user_database_new ();
sl@0:   if (context->user_database == NULL)
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       goto failed;
sl@0:     }
sl@0:   
sl@0:   /* Note that we don't know whether the print_addr_fd is
sl@0:    * one of the sockets we're using to listen on, or some
sl@0:    * other random thing. But I think the answer is "don't do
sl@0:    * that then"
sl@0:    */
sl@0:   if (print_addr_fd >= 0)
sl@0:     {
sl@0:       DBusString addr;
sl@0:       const char *a = bus_context_get_address (context);
sl@0:       int bytes;
sl@0:       
sl@0:       _dbus_assert (a != NULL);
sl@0:       if (!_dbus_string_init (&addr))
sl@0:         {
sl@0:           BUS_SET_OOM (error);
sl@0:           goto failed;
sl@0:         }
sl@0:         
sl@0:                 
sl@0:         
sl@0:         #ifndef __SYMBIAN32__
sl@0:          if (!_dbus_string_append (&addr, a) ||
sl@0:           !_dbus_string_append (&addr, "\n")) 
sl@0:       #else
sl@0:       if (!_dbus_string_append (&addr, a) )
sl@0:     
sl@0:        #endif 
sl@0:         {
sl@0:           _dbus_string_free (&addr);
sl@0:           BUS_SET_OOM (error);
sl@0:           goto failed;
sl@0:         }
sl@0: 		
sl@0: 		
sl@0:       bytes = _dbus_string_get_length (&addr);
sl@0:       if (_dbus_write_socket (print_addr_fd, &addr, 0, bytes) != bytes)
sl@0:         {
sl@0:           dbus_set_error (error, DBUS_ERROR_FAILED,
sl@0:                           "Printing message bus address: %s\n",
sl@0:                           _dbus_strerror (errno));
sl@0:           _dbus_string_free (&addr);
sl@0:           goto failed;
sl@0:         }
sl@0: 
sl@0:       if (print_addr_fd > 2)
sl@0:         _dbus_close_socket (print_addr_fd, NULL);
sl@0: 
sl@0:       _dbus_string_free (&addr);
sl@0:     }
sl@0:   
sl@0:   context->connections = bus_connections_new (context);
sl@0:   if (context->connections == NULL)
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       goto failed;
sl@0:     }
sl@0: 
sl@0:   context->matchmaker = bus_matchmaker_new ();
sl@0:   if (context->matchmaker == NULL)
sl@0:     {
sl@0:       BUS_SET_OOM (error);
sl@0:       goto failed;
sl@0:     }
sl@0: 
sl@0:   /* check user before we fork */
sl@0:   if (context->user != NULL)
sl@0:     {
sl@0:       DBusString u;
sl@0: 
sl@0:       _dbus_string_init_const (&u, context->user);
sl@0: 
sl@0:       if (!_dbus_credentials_from_username (&u, &creds) ||
sl@0:           creds.uid < 0 ||
sl@0:           creds.gid < 0)
sl@0:         {
sl@0:           dbus_set_error (error, DBUS_ERROR_FAILED,
sl@0:                           "Could not get UID and GID for username \"%s\"",
sl@0:                           context->user);
sl@0:           goto failed;
sl@0:         }
sl@0:     }
sl@0: 
sl@0:   /* Now become a daemon if appropriate */
sl@0:   if ((force_fork != FORK_NEVER && context->fork) || force_fork == FORK_ALWAYS)
sl@0:     {
sl@0:       DBusString u;
sl@0: 
sl@0:       if (context->pidfile)
sl@0:         _dbus_string_init_const (&u, context->pidfile);
sl@0:       
sl@0:       if (!_dbus_become_daemon (context->pidfile ? &u : NULL, 
sl@0: 				print_pid_fd,
sl@0: 				error))
sl@0: 	{
sl@0: 	  _DBUS_ASSERT_ERROR_IS_SET (error);
sl@0: 	  goto failed;
sl@0: 	}
sl@0:     }
sl@0:   else
sl@0:     {
sl@0:       /* Need to write PID file for ourselves, not for the child process */
sl@0:       if (context->pidfile != NULL)
sl@0:         {
sl@0:           DBusString u;
sl@0: 
sl@0:           _dbus_string_init_const (&u, context->pidfile);
sl@0:           
sl@0:           if (!_dbus_write_pid_file (&u, _dbus_getpid (), error))
sl@0: 	    {
sl@0: 	      _DBUS_ASSERT_ERROR_IS_SET (error);
sl@0: 	      goto failed;
sl@0: 	    }
sl@0:         }
sl@0:     }
sl@0: 
sl@0:   /* Write PID if requested */
sl@0:   if (print_pid_fd >= 0)
sl@0:     {
sl@0:       DBusString pid;
sl@0:       int bytes;
sl@0: 
sl@0:       if (!_dbus_string_init (&pid))
sl@0:         {
sl@0:           BUS_SET_OOM (error);
sl@0:           goto failed;
sl@0:         }
sl@0:       
sl@0:       if (!_dbus_string_append_int (&pid, _dbus_getpid ()) ||
sl@0:           !_dbus_string_append (&pid, "\n"))
sl@0:         {
sl@0:           _dbus_string_free (&pid);
sl@0:           BUS_SET_OOM (error);
sl@0:           goto failed;
sl@0:         }
sl@0: 
sl@0:       bytes = _dbus_string_get_length (&pid);
sl@0:       if (_dbus_write_socket (print_pid_fd, &pid, 0, bytes) != bytes)
sl@0:         {
sl@0:           dbus_set_error (error, DBUS_ERROR_FAILED,
sl@0:                           "Printing message bus PID: %s\n",
sl@0:                           _dbus_strerror (errno));
sl@0:           _dbus_string_free (&pid);
sl@0:           goto failed;
sl@0:         }
sl@0: 
sl@0:       if (print_pid_fd > 2)
sl@0:         _dbus_close_socket (print_pid_fd, NULL);
sl@0:       
sl@0:       _dbus_string_free (&pid);
sl@0:     }
sl@0: 
sl@0:   if (!bus_selinux_full_init ())
sl@0:     {
sl@0:       _dbus_warn ("SELinux initialization failed\n");
sl@0:     }
sl@0: 
sl@0:   if (!process_config_postinit (context, parser, error))
sl@0:     {
sl@0:       _DBUS_ASSERT_ERROR_IS_SET (error);
sl@0:       goto failed;
sl@0:     }
sl@0: 
sl@0:   if (parser != NULL)
sl@0:     {
sl@0:       bus_config_parser_unref (parser);
sl@0:       parser = NULL;
sl@0:     }
sl@0:   
sl@0:   /* Here we change our credentials if required,
sl@0:    * as soon as we've set up our sockets and pidfile
sl@0:    */
sl@0:   if (context->user != NULL)
sl@0:     {
sl@0:       if (!_dbus_change_identity (creds.uid, creds.gid, error))
sl@0: 	{
sl@0: 	  _DBUS_ASSERT_ERROR_IS_SET (error);
sl@0: 	  goto failed;
sl@0: 	}
sl@0:     }
sl@0:   
sl@0:   dbus_server_free_data_slot (&server_data_slot);
sl@0:   
sl@0:   return context;
sl@0:   
sl@0:  failed:  
sl@0:   if (parser != NULL)
sl@0:     bus_config_parser_unref (parser);
sl@0:   if (context != NULL)
sl@0:     bus_context_unref (context);
sl@0: 
sl@0:   if (server_data_slot >= 0)
sl@0:     dbus_server_free_data_slot (&server_data_slot);
sl@0:   
sl@0:   return NULL;
sl@0: }
sl@0: 
sl@0: dbus_bool_t
sl@0: bus_context_reload_config (BusContext *context,
sl@0: 			   DBusError  *error)
sl@0: {
sl@0:   BusConfigParser *parser;
sl@0:   DBusString config_file;
sl@0:   dbus_bool_t ret;
sl@0: 
sl@0:   /* Flush the user database cache */
sl@0:   _dbus_user_database_flush(context->user_database);
sl@0: 
sl@0:   ret = FALSE;
sl@0:   _dbus_string_init_const (&config_file, context->config_file);
sl@0:   parser = bus_config_load (&config_file, TRUE, NULL, error);
sl@0:   if (parser == NULL)
sl@0:     {
sl@0:       _DBUS_ASSERT_ERROR_IS_SET (error);
sl@0:       goto failed;
sl@0:     }
sl@0:   
sl@0:   if (!process_config_every_time (context, parser, TRUE, error))
sl@0:     {
sl@0:       _DBUS_ASSERT_ERROR_IS_SET (error);
sl@0:       goto failed;
sl@0:     }
sl@0:   if (!process_config_postinit (context, parser, error))
sl@0:     {
sl@0:       _DBUS_ASSERT_ERROR_IS_SET (error);
sl@0:       goto failed;
sl@0:     }
sl@0:   ret = TRUE;
sl@0: 
sl@0:  failed:  
sl@0:   if (parser != NULL)
sl@0:     bus_config_parser_unref (parser);
sl@0:   return ret;
sl@0: }
sl@0: 
sl@0: static void
sl@0: shutdown_server (BusContext *context,
sl@0:                  DBusServer *server)
sl@0: {
sl@0:   if (server == NULL ||
sl@0:       !dbus_server_get_is_connected (server))
sl@0:     return;
sl@0:   
sl@0:   if (!dbus_server_set_watch_functions (server,
sl@0:                                         NULL, NULL, NULL,
sl@0:                                         context,
sl@0:                                         NULL))
sl@0:     _dbus_assert_not_reached ("setting watch functions to NULL failed");
sl@0:   
sl@0:   if (!dbus_server_set_timeout_functions (server,
sl@0:                                           NULL, NULL, NULL,
sl@0:                                           context,
sl@0:                                           NULL))
sl@0:     _dbus_assert_not_reached ("setting timeout functions to NULL failed");
sl@0:   
sl@0:   dbus_server_disconnect (server);
sl@0: }
sl@0: 
sl@0: void
sl@0: bus_context_shutdown (BusContext  *context)
sl@0: {
sl@0:   DBusList *link;
sl@0: 
sl@0:   link = _dbus_list_get_first_link (&context->servers);
sl@0:   while (link != NULL)
sl@0:     {
sl@0:       shutdown_server (context, link->data);
sl@0: 
sl@0:       link = _dbus_list_get_next_link (&context->servers, link);
sl@0:     }
sl@0: }
sl@0: 
sl@0: BusContext *
sl@0: bus_context_ref (BusContext *context)
sl@0: {
sl@0:   _dbus_assert (context->refcount > 0);
sl@0:   context->refcount += 1;
sl@0: 
sl@0:   return context;
sl@0: }
sl@0: 
sl@0: void
sl@0: bus_context_unref (BusContext *context)
sl@0: {
sl@0:   _dbus_assert (context->refcount > 0);
sl@0:   context->refcount -= 1;
sl@0: 
sl@0:   if (context->refcount == 0)
sl@0:     {
sl@0:       DBusList *link;
sl@0:       
sl@0:       _dbus_verbose ("Finalizing bus context %p\n", context);
sl@0:       
sl@0:       bus_context_shutdown (context);
sl@0: 
sl@0:       if (context->connections)
sl@0:         {
sl@0:           bus_connections_unref (context->connections);
sl@0:           context->connections = NULL;
sl@0:         }
sl@0:       
sl@0:       if (context->registry)
sl@0:         {
sl@0:           bus_registry_unref (context->registry);
sl@0:           context->registry = NULL;
sl@0:         }
sl@0:       
sl@0:       if (context->activation)
sl@0:         {
sl@0:           bus_activation_unref (context->activation);
sl@0:           context->activation = NULL;
sl@0:         }
sl@0: 
sl@0:       link = _dbus_list_get_first_link (&context->servers);
sl@0:       while (link != NULL)
sl@0:         {
sl@0:           dbus_server_unref (link->data);
sl@0:           
sl@0:           link = _dbus_list_get_next_link (&context->servers, link);
sl@0:         }
sl@0:       _dbus_list_clear (&context->servers);
sl@0: 
sl@0:       if (context->policy)
sl@0:         {
sl@0:           bus_policy_unref (context->policy);
sl@0:           context->policy = NULL;
sl@0:         }
sl@0:       
sl@0:       if (context->loop)
sl@0:         {
sl@0:           _dbus_loop_unref (context->loop);
sl@0:           context->loop = NULL;
sl@0:         }
sl@0: 
sl@0:       if (context->matchmaker)
sl@0:         {
sl@0:           bus_matchmaker_unref (context->matchmaker);
sl@0:           context->matchmaker = NULL;
sl@0:         }
sl@0:       
sl@0:       dbus_free (context->config_file);
sl@0:       dbus_free (context->type);
sl@0:       dbus_free (context->address);
sl@0:       dbus_free (context->user);
sl@0: 
sl@0:       if (context->pidfile)
sl@0: 	{
sl@0:           DBusString u;
sl@0:           _dbus_string_init_const (&u, context->pidfile);
sl@0: 
sl@0:           /* Deliberately ignore errors here, since there's not much
sl@0: 	   * we can do about it, and we're exiting anyways.
sl@0: 	   */
sl@0: 	  _dbus_delete_file (&u, NULL);
sl@0: 
sl@0:           dbus_free (context->pidfile); 
sl@0: 	}
sl@0: 
sl@0:       if (context->user_database != NULL)
sl@0: 	_dbus_user_database_unref (context->user_database);
sl@0:       
sl@0:       dbus_free (context);
sl@0: 
sl@0:       dbus_server_free_data_slot (&server_data_slot);
sl@0:     }
sl@0: }
sl@0: 
sl@0: /* type may be NULL */
sl@0: const char*
sl@0: bus_context_get_type (BusContext *context)
sl@0: {
sl@0:   return context->type;
sl@0: }
sl@0: 
sl@0: const char*
sl@0: bus_context_get_address (BusContext *context)
sl@0: {
sl@0:   return context->address;
sl@0: }
sl@0: 
sl@0: BusRegistry*
sl@0: bus_context_get_registry (BusContext  *context)
sl@0: {
sl@0:   return context->registry;
sl@0: }
sl@0: 
sl@0: BusConnections*
sl@0: bus_context_get_connections (BusContext  *context)
sl@0: {
sl@0:   return context->connections;
sl@0: }
sl@0: 
sl@0: BusActivation*
sl@0: bus_context_get_activation (BusContext  *context)
sl@0: {
sl@0:   return context->activation;
sl@0: }
sl@0: 
sl@0: BusMatchmaker*
sl@0: bus_context_get_matchmaker (BusContext  *context)
sl@0: {
sl@0:   return context->matchmaker;
sl@0: }
sl@0: 
sl@0: DBusLoop*
sl@0: bus_context_get_loop (BusContext *context)
sl@0: {
sl@0:   return context->loop;
sl@0: }
sl@0: 
sl@0: DBusUserDatabase*
sl@0: bus_context_get_user_database (BusContext *context)
sl@0: {
sl@0:   return context->user_database;
sl@0: }
sl@0: 
sl@0: dbus_bool_t
sl@0: bus_context_allow_user (BusContext   *context,
sl@0:                         unsigned long uid)
sl@0: {
sl@0:   return bus_policy_allow_user (context->policy,
sl@0:                                 context->user_database,
sl@0:                                 uid);
sl@0: }
sl@0: 
sl@0: BusPolicy *
sl@0: bus_context_get_policy (BusContext *context)
sl@0: {
sl@0:   return context->policy;
sl@0: }
sl@0: 
sl@0: BusClientPolicy*
sl@0: bus_context_create_client_policy (BusContext      *context,
sl@0:                                   DBusConnection  *connection,
sl@0:                                   DBusError       *error)
sl@0: {
sl@0:   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
sl@0:   return bus_policy_create_client_policy (context->policy, connection,
sl@0:                                           error);
sl@0: }
sl@0: 
sl@0: int
sl@0: bus_context_get_activation_timeout (BusContext *context)
sl@0: {
sl@0:   
sl@0:   return context->limits.activation_timeout;
sl@0: }
sl@0: 
sl@0: int
sl@0: bus_context_get_auth_timeout (BusContext *context)
sl@0: {
sl@0:   return context->limits.auth_timeout;
sl@0: }
sl@0: 
sl@0: int
sl@0: bus_context_get_max_completed_connections (BusContext *context)
sl@0: {
sl@0:   return context->limits.max_completed_connections;
sl@0: }
sl@0: 
sl@0: int
sl@0: bus_context_get_max_incomplete_connections (BusContext *context)
sl@0: {
sl@0:   return context->limits.max_incomplete_connections;
sl@0: }
sl@0: 
sl@0: int
sl@0: bus_context_get_max_connections_per_user (BusContext *context)
sl@0: {
sl@0:   return context->limits.max_connections_per_user;
sl@0: }
sl@0: 
sl@0: int
sl@0: bus_context_get_max_pending_activations (BusContext *context)
sl@0: {
sl@0:   return context->limits.max_pending_activations;
sl@0: }
sl@0: 
sl@0: int
sl@0: bus_context_get_max_services_per_connection (BusContext *context)
sl@0: {
sl@0:   return context->limits.max_services_per_connection;
sl@0: }
sl@0: 
sl@0: int
sl@0: bus_context_get_max_match_rules_per_connection (BusContext *context)
sl@0: {
sl@0:   return context->limits.max_match_rules_per_connection;
sl@0: }
sl@0: 
sl@0: int
sl@0: bus_context_get_max_replies_per_connection (BusContext *context)
sl@0: {
sl@0:   return context->limits.max_replies_per_connection;
sl@0: }
sl@0: 
sl@0: int
sl@0: bus_context_get_reply_timeout (BusContext *context)
sl@0: {
sl@0:   return context->limits.reply_timeout;
sl@0: }
sl@0: 
sl@0: /*
sl@0:  * addressed_recipient is the recipient specified in the message.
sl@0:  *
sl@0:  * proposed_recipient is the recipient we're considering sending
sl@0:  * to right this second, and may be an eavesdropper.
sl@0:  *
sl@0:  * sender is the sender of the message.
sl@0:  *
sl@0:  * NULL for proposed_recipient or sender definitely means the bus driver.
sl@0:  *
sl@0:  * NULL for addressed_recipient may mean the bus driver, or may mean
sl@0:  * no destination was specified in the message (e.g. a signal).
sl@0:  */
sl@0: dbus_bool_t
sl@0: bus_context_check_security_policy (BusContext     *context,
sl@0:                                    BusTransaction *transaction,
sl@0:                                    DBusConnection *sender,
sl@0:                                    DBusConnection *addressed_recipient,
sl@0:                                    DBusConnection *proposed_recipient,
sl@0:                                    DBusMessage    *message,
sl@0:                                    DBusError      *error)
sl@0: {
sl@0:   BusClientPolicy *sender_policy;
sl@0:   BusClientPolicy *recipient_policy;
sl@0:   int type;
sl@0:   dbus_bool_t requested_reply;
sl@0:   
sl@0:   type = dbus_message_get_type (message);
sl@0:   
sl@0:   /* dispatch.c was supposed to ensure these invariants */
sl@0:   _dbus_assert (dbus_message_get_destination (message) != NULL ||
sl@0:                 type == DBUS_MESSAGE_TYPE_SIGNAL ||
sl@0:                 (sender == NULL && !bus_connection_is_active (proposed_recipient)));
sl@0:   _dbus_assert (type == DBUS_MESSAGE_TYPE_SIGNAL ||
sl@0:                 addressed_recipient != NULL ||
sl@0:                 strcmp (dbus_message_get_destination (message), DBUS_SERVICE_DBUS) == 0);
sl@0:   
sl@0:   switch (type)
sl@0:     {
sl@0:     case DBUS_MESSAGE_TYPE_METHOD_CALL:
sl@0:     case DBUS_MESSAGE_TYPE_SIGNAL:
sl@0:     case DBUS_MESSAGE_TYPE_METHOD_RETURN:
sl@0:     case DBUS_MESSAGE_TYPE_ERROR:
sl@0:       break;
sl@0:       
sl@0:     default:
sl@0:       _dbus_verbose ("security check disallowing message of unknown type %d\n",
sl@0:                      type);
sl@0: 
sl@0:       dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
sl@0:                       "Message bus will not accept messages of unknown type\n");
sl@0:               
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   requested_reply = FALSE;
sl@0:   
sl@0:   if (sender != NULL)
sl@0:     {
sl@0:       const char *dest;
sl@0: 
sl@0:       dest = dbus_message_get_destination (message);
sl@0: 	
sl@0:       /* First verify the SELinux access controls.  If allowed then
sl@0:        * go on with the standard checks.
sl@0:        */
sl@0:       if (!bus_selinux_allows_send (sender, proposed_recipient,
sl@0: 				    dbus_message_type_to_string (dbus_message_get_type (message)),
sl@0: 				    dbus_message_get_interface (message),
sl@0: 				    dbus_message_get_member (message),
sl@0: 				    dbus_message_get_error_name (message),
sl@0: 				    dest ? dest : DBUS_SERVICE_DBUS, error))
sl@0:         {
sl@0: 
sl@0: 	  if (dbus_error_is_set (error) &&
sl@0: 	      dbus_error_has_name (error, DBUS_ERROR_NO_MEMORY))
sl@0: 	    {
sl@0: 	      return FALSE;
sl@0: 	    }
sl@0: 	  
sl@0: 
sl@0:           dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
sl@0:                           "An SELinux policy prevents this sender "
sl@0:                           "from sending this message to this recipient "
sl@0:                           "(rejected message had interface \"%s\" "
sl@0:                           "member \"%s\" error name \"%s\" destination \"%s\")",
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:                           dest ? dest : DBUS_SERVICE_DBUS);
sl@0:           _dbus_verbose ("SELinux security check denying send to service\n");
sl@0:           return FALSE;
sl@0:         }
sl@0:        
sl@0:       if (bus_connection_is_active (sender))
sl@0:         {
sl@0:           sender_policy = bus_connection_get_policy (sender);
sl@0:           _dbus_assert (sender_policy != NULL);
sl@0:           
sl@0:           /* Fill in requested_reply variable with TRUE if this is a
sl@0:            * reply and the reply was pending.
sl@0:            */
sl@0:           if (dbus_message_get_reply_serial (message) != 0)
sl@0:             {
sl@0:               if (proposed_recipient != NULL /* not to the bus driver */ &&
sl@0:                   addressed_recipient == proposed_recipient /* not eavesdropping */)
sl@0:                 {
sl@0:                   DBusError error2;                  
sl@0:                   
sl@0:                   dbus_error_init (&error2);
sl@0:                   requested_reply = bus_connections_check_reply (bus_connection_get_connections (sender),
sl@0:                                                                  transaction,
sl@0:                                                                  sender, addressed_recipient, message,
sl@0:                                                                  &error2);
sl@0:                   if (dbus_error_is_set (&error2))
sl@0:                     {
sl@0:                       dbus_move_error (&error2, error);
sl@0:                       return FALSE;
sl@0:                     }
sl@0:                 }
sl@0:             }
sl@0:         }
sl@0:       else
sl@0:         {
sl@0:           /* Policy for inactive connections is that they can only send
sl@0:            * the hello message to the bus driver
sl@0:            */
sl@0:           if (proposed_recipient == NULL &&
sl@0:               dbus_message_is_method_call (message,
sl@0:                                            DBUS_INTERFACE_DBUS,
sl@0:                                            "Hello"))
sl@0:             {
sl@0:               _dbus_verbose ("security check allowing %s message\n",
sl@0:                              "Hello");
sl@0:               return TRUE;
sl@0:             }
sl@0:           else
sl@0:             {
sl@0:               _dbus_verbose ("security check disallowing non-%s message\n",
sl@0:                              "Hello");
sl@0: 
sl@0:               dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
sl@0:                               "Client tried to send a message other than %s without being registered",
sl@0:                               "Hello");
sl@0:               
sl@0:               return FALSE;
sl@0:             }
sl@0:         }
sl@0:     }
sl@0:   else
sl@0:     {
sl@0:       sender_policy = NULL;
sl@0: 
sl@0:       /* If the sender is the bus driver, we assume any reply was a
sl@0:        * requested reply as bus driver won't send bogus ones
sl@0:        */
sl@0:       if (addressed_recipient == proposed_recipient /* not eavesdropping */ &&
sl@0:           dbus_message_get_reply_serial (message) != 0)
sl@0:         requested_reply = TRUE;
sl@0:     }
sl@0: 
sl@0:   _dbus_assert ((sender != NULL && sender_policy != NULL) ||
sl@0:                 (sender == NULL && sender_policy == NULL));
sl@0:   
sl@0:   if (proposed_recipient != NULL)
sl@0:     {
sl@0:       /* only the bus driver can send to an inactive recipient (as it
sl@0:        * owns no services, so other apps can't address it). Inactive
sl@0:        * recipients can receive any message.
sl@0:        */
sl@0:       if (bus_connection_is_active (proposed_recipient))
sl@0:         {
sl@0:           recipient_policy = bus_connection_get_policy (proposed_recipient);
sl@0:           _dbus_assert (recipient_policy != NULL);
sl@0:         }
sl@0:       else if (sender == NULL)
sl@0:         {
sl@0:           _dbus_verbose ("security check using NULL recipient policy for message from bus\n");
sl@0:           recipient_policy = NULL;
sl@0:         }
sl@0:       else
sl@0:         {
sl@0:           _dbus_assert_not_reached ("a message was somehow sent to an inactive recipient from a source other than the message bus\n");
sl@0:           recipient_policy = NULL;
sl@0:         }
sl@0:     }
sl@0:   else
sl@0:     recipient_policy = NULL;
sl@0:   
sl@0:   _dbus_assert ((proposed_recipient != NULL && recipient_policy != NULL) ||
sl@0:                 (proposed_recipient != NULL && sender == NULL && recipient_policy == NULL) ||
sl@0:                 (proposed_recipient == NULL && recipient_policy == NULL));
sl@0:   
sl@0:   if (sender_policy &&
sl@0:       !bus_client_policy_check_can_send (sender_policy,
sl@0:                                          context->registry,
sl@0:                                          requested_reply,
sl@0:                                          proposed_recipient,
sl@0:                                          message))
sl@0:     {
sl@0:       const char *dest;
sl@0: 
sl@0:       dest = dbus_message_get_destination (message);
sl@0:       dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
sl@0:                       "A security policy in place prevents this sender "
sl@0:                       "from sending this message to this recipient, "
sl@0:                       "see message bus configuration file (rejected message "
sl@0:                       "had interface \"%s\" member \"%s\" error name \"%s\" destination \"%s\")",
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:                       dest ? dest : DBUS_SERVICE_DBUS);
sl@0:       _dbus_verbose ("security policy disallowing message due to sender policy\n");
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   if (recipient_policy &&
sl@0:       !bus_client_policy_check_can_receive (recipient_policy,
sl@0:                                             context->registry,
sl@0:                                             requested_reply,
sl@0:                                             sender,
sl@0:                                             addressed_recipient, proposed_recipient,
sl@0:                                             message))
sl@0:     {
sl@0:       const char *dest;
sl@0: 
sl@0:       dest = dbus_message_get_destination (message);
sl@0:       dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
sl@0:                       "A security policy in place prevents this recipient "
sl@0:                       "from receiving this message from this sender, "
sl@0:                       "see message bus configuration file (rejected message "
sl@0:                       "had interface \"%s\" member \"%s\" error name \"%s\" destination \"%s\" reply serial %u requested_reply=%d)",
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:                       dest ? dest : DBUS_SERVICE_DBUS,
sl@0:                       dbus_message_get_reply_serial (message),
sl@0:                       requested_reply);
sl@0:       _dbus_verbose ("security policy disallowing message due to recipient policy\n");
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   /* See if limits on size have been exceeded */
sl@0:   if (proposed_recipient &&
sl@0:       dbus_connection_get_outgoing_size (proposed_recipient) >
sl@0:       context->limits.max_outgoing_bytes)
sl@0:     {
sl@0:       const char *dest;
sl@0: 
sl@0:       dest = dbus_message_get_destination (message);
sl@0:       dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
sl@0:                       "The destination service \"%s\" has a full message queue",
sl@0:                       dest ? dest : (proposed_recipient ?
sl@0:                                      bus_connection_get_name (proposed_recipient) : 
sl@0:                                      DBUS_SERVICE_DBUS));
sl@0:       _dbus_verbose ("security policy disallowing message due to full message queue\n");
sl@0:       return FALSE;
sl@0:     }
sl@0: 
sl@0:   /* Record that we will allow a reply here in the future (don't
sl@0:    * bother if the recipient is the bus or this is an eavesdropping
sl@0:    * connection). Only the addressed recipient may reply.
sl@0:    */
sl@0:   if (type == DBUS_MESSAGE_TYPE_METHOD_CALL &&
sl@0:       sender && 
sl@0:       addressed_recipient &&
sl@0:       addressed_recipient == proposed_recipient && /* not eavesdropping */
sl@0:       !bus_connections_expect_reply (bus_connection_get_connections (sender),
sl@0:                                      transaction,
sl@0:                                      sender, addressed_recipient,
sl@0:                                      message, error))
sl@0:     {
sl@0:       _dbus_verbose ("Failed to record reply expectation or problem with the message expecting a reply\n");
sl@0:       return FALSE;
sl@0:     }
sl@0:   
sl@0:   _dbus_verbose ("security policy allowing message\n");
sl@0:   return TRUE;
sl@0: }