path: root/shell/e-shell-nm.c

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Shreyas Srinivasan <sshreyas@novell.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#define DBUS_API_SUBJECT_TO_CHANGE 1

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <string.h>
#include <glib.h>
#include <e-shell.h>
#include <dbus/dbus.h>
#include <dbus/dbus-glib-lowlevel.h>
#include <dbus/dbus-glib.h>
#include <NetworkManager/NetworkManager.h>

static DBusConnection *dbus_connection;

/* Forward Declaration */
gboolean e_shell_dbus_initialize (EShell *shell);

static gboolean
reinit_dbus (EShell *shell)
{
    return !e_shell_dbus_initialize (shell);
}

static DBusHandlerResult
e_shell_network_monitor (DBusConnection *connection G_GNUC_UNUSED,
                         DBusMessage *message,
                         gpointer user_data)
{
    DBusError error = DBUS_ERROR_INIT;
    EShell *shell = user_data;
    const gchar *path;
    guint32 state;

    path = dbus_message_get_path (message);

    if (dbus_message_is_signal (message, DBUS_INTERFACE_LOCAL, "Disconnected") &&
        path != NULL && strcmp (path, DBUS_PATH_LOCAL) == 0) {
        dbus_connection_unref (dbus_connection);
        dbus_connection = NULL;

        g_timeout_add_seconds (3, (GSourceFunc) reinit_dbus, shell);

        return DBUS_HANDLER_RESULT_HANDLED;
    }

    if (!dbus_message_is_signal (message, NM_DBUS_INTERFACE, "StateChanged"))
        return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;

    dbus_message_get_args (
        message, &error,
        DBUS_TYPE_UINT32, &state,
        DBUS_TYPE_INVALID);

    if (dbus_error_is_set (&error)) {
        g_warning ("%s", error.message);
        return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
    }

    switch (state) {
        case NM_STATE_CONNECTED:
            e_shell_set_network_available (shell, TRUE);
            break;
        case NM_STATE_ASLEEP:
        case NM_STATE_DISCONNECTED:
            e_shell_set_network_available (shell, FALSE);
            break;
        default:
            break;
    }

    return DBUS_HANDLER_RESULT_HANDLED;
}

static void
check_initial_state (EShell *shell)
{
    DBusMessage *message = NULL, *response = NULL;
    guint32 state = -1;
    DBusError error = DBUS_ERROR_INIT;

    message = dbus_message_new_method_call (
        NM_DBUS_SERVICE, NM_DBUS_PATH, NM_DBUS_INTERFACE, "state");

    /* assuming this should be safe to call syncronously */
    response = dbus_connection_send_with_reply_and_block (
        dbus_connection, message, 100, &error);

    if (response)
        dbus_message_get_args (
            response, &error, DBUS_TYPE_UINT32,
            &state, DBUS_TYPE_INVALID);
    else {
        g_warning ("%s", error.message);
        dbus_error_free (&error);
        return;
    }

    /* Update the state only in the absence of a network connection,
     * otherwise let the old state prevail. */
    if (state == NM_STATE_DISCONNECTED)
        e_shell_set_network_available (shell, FALSE);

    dbus_message_unref (message);
    dbus_message_unref (response);
}

gboolean
e_shell_dbus_initialize (EShell *shell)
{
    DBusError error = DBUS_ERROR_INIT;

    g_return_val_if_fail (E_IS_SHELL (shell), FALSE);

    if (dbus_connection != NULL)
        return TRUE;

    dbus_connection = dbus_bus_get (DBUS_BUS_SYSTEM, &error);
    if (dbus_connection == NULL) {
        g_warning ("%s", error.message);
        dbus_error_free (&error);
        return FALSE;
    }

    dbus_connection_setup_with_g_main (dbus_connection, NULL);
    dbus_connection_set_exit_on_disconnect (dbus_connection, FALSE);

    if (!dbus_connection_add_filter (dbus_connection, e_shell_network_monitor, shell, NULL))
        goto exception;

    check_initial_state (shell);

    dbus_bus_add_match (dbus_connection,
                "type='signal',"
                "interface='" NM_DBUS_INTERFACE "',"
                "sender='" NM_DBUS_SERVICE "',"
                "path='" NM_DBUS_PATH "'", &error);
    if (dbus_error_is_set (&error)) {
        g_warning ("%s", error.message);
        dbus_error_free (&error);
        goto exception;
    }

    return TRUE;

exception:

    dbus_connection_unref (dbus_connection);
    dbus_connection = NULL;

    return FALSE;
}