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/* -*- mode: C; c-file-style: "gnu" -*- */
/* dispatch.c Message dispatcher
*
* Copyright (C) 2003 CodeFactory AB
*
* Licensed under the Academic Free License version 1.2
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "dispatch.h"
#include "connection.h"
#include "driver.h"
#include "utils.h"
#include <dbus/dbus-internals.h>
#include <string.h>
static int message_handler_slot;
static void
send_one_message (DBusConnection *connection, void *data)
{
/* Only send messages to registered connections */
if (bus_connection_get_name (connection) == NULL)
return;
BUS_HANDLE_OOM (dbus_connection_send_message (connection, data, NULL, NULL));
}
void
bus_dispatch_broadcast_message (DBusMessage *message)
{
_dbus_assert (dbus_message_get_sender (message) != NULL);
bus_connection_foreach (send_one_message, message);
}
static DBusHandlerResult
bus_dispatch_message_handler (DBusMessageHandler *handler,
DBusConnection *connection,
DBusMessage *message,
void *user_data)
{
const char *sender, *service_name, *message_name;
/* Assign a sender to the message */
sender = bus_connection_get_name (connection);
BUS_HANDLE_OOM (dbus_message_set_sender (message, sender));
service_name = dbus_message_get_service (message);
message_name = dbus_message_get_name (message);
/* TODO: Crashes if service_name == NULL */
/* See if the message is to the driver */
if (message_name && strcmp (message_name, DBUS_MESSAGE_LOCAL_DISCONNECT) == 0)
{
bus_connection_disconnect (connection);
}
else if (strcmp (service_name, DBUS_SERVICE_DBUS) == 0)
{
bus_driver_handle_message (connection, message);
}
else if (sender == NULL)
{
_dbus_verbose ("Received message from non-registered client. Disconnecting.\n");
dbus_connection_disconnect (connection);
}
else if (strcmp (service_name, DBUS_SERVICE_BROADCAST) == 0)
{
bus_dispatch_broadcast_message (message);
}
else
{
DBusString service_string;
BusService *service;
_dbus_string_init_const (&service_string, service_name);
service = bus_service_lookup (&service_string, FALSE);
if (!service)
{
DBusMessage *error_reply;
DBusString error_message;
const char *error_str;
/* Trying to send a message to a non-existant service,
bounce back an error message. */
BUS_HANDLE_OOM (_dbus_string_init (&error_message, _DBUS_INT_MAX));
BUS_HANDLE_OOM (_dbus_string_append (&error_message, "Service \""));
BUS_HANDLE_OOM (_dbus_string_append (&error_message, service_name));
BUS_HANDLE_OOM (_dbus_string_append (&error_message, "does not exist"));
_dbus_string_get_const_data (&error_message, &error_str);
BUS_HANDLE_OOM (error_reply = dbus_message_new_error_reply (message, DBUS_ERROR_SERVICE_DOES_NOT_EXIST,
error_str));
_dbus_string_free (&error_message);
/* Dispatch the message */
BUS_HANDLE_OOM (dbus_connection_send_message (connection, error_reply, NULL, NULL));
dbus_message_unref (error_reply);
}
else
{
_dbus_assert (bus_service_get_primary_owner (service) != NULL);
/* Dispatch the message */
BUS_HANDLE_OOM (dbus_connection_send_message (bus_service_get_primary_owner (service),
message, NULL, NULL));
}
}
return DBUS_HANDLER_RESULT_ALLOW_MORE_HANDLERS;
}
dbus_bool_t
bus_dispatch_add_connection (DBusConnection *connection)
{
DBusMessageHandler *handler;
message_handler_slot = dbus_connection_allocate_data_slot ();
if (message_handler_slot < 0)
return FALSE;
handler = dbus_message_handler_new (bus_dispatch_message_handler, NULL, NULL);
if (!dbus_connection_add_filter (connection, handler))
{
dbus_message_handler_unref (handler);
return FALSE;
}
if (!dbus_connection_set_data (connection,
message_handler_slot,
handler,
(DBusFreeFunction)dbus_message_handler_unref))
{
dbus_connection_remove_filter (connection, handler);
dbus_message_handler_unref (handler);
return FALSE;
}
return TRUE;
}
void
bus_dispatch_remove_connection (DBusConnection *connection)
{
/* Here we tell the bus driver that we want to get off. */
bus_driver_remove_connection (connection);
dbus_connection_set_data (connection,
message_handler_slot,
NULL, NULL);
}
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