appdemo.c

linux系统下3G模块守护进程测试源代码

/**************************************************************


Description: A simulated application that communicate with 3G

$Log: 
**************************************************************/
#include <glib.h>
#include <dbus/dbus.h>
#include <dbus/dbus-glib.h>

static gboolean SendThenGet (DBusConnection *bus);


static DBusHandlerResult
signal_filter (DBusConnection *connection, DBusMessage *message, void *user_data)
{
    // User data is the event loop we are running in
    GMainLoop *loop = user_data;

    // A Ping signal on the com.burtonini.dbus.Signal interface
    if (dbus_message_is_signal (message, "com.compal.ThreeGtoApp.Signal", "Response")) 
    {
        DBusError error;
        char *s;
        dbus_error_init (&error);
        if (dbus_message_get_args 
        (message, &error, DBUS_TYPE_STRING, &s, DBUS_TYPE_INVALID)) 
        {
            g_print("received: %s\n", s);
        }
        else 
        {
            g_print("received, but error getting message: %s\n", error.message);
            dbus_error_free (&error);
        }
        return DBUS_HANDLER_RESULT_HANDLED;
    }
}

static gboolean SendThenGet (DBusConnection *bus)
{
    DBusMessage *message;
    const char *command = "AT+CGMI\r";

    /* Create a new signal "Command" on the "AppTo3G.dbus.Signal" interface,
     * from the object "/AppTo3G/dbus/command". */
    message = dbus_message_new_signal ("/com/compal/3G/Send",
                                       "com.compal.AppTo3G.Signal",
                                       "Command");

    // Append the arguments to the signal
    dbus_message_append_args (message,
                            DBUS_TYPE_STRING, &command,
                            DBUS_TYPE_INVALID);
    // Send the signal
    dbus_connection_send(bus, message, NULL);

    // Free the signal now we have finished with it
    dbus_message_unref(message);

    // Tell the user we send a signal
    g_print("%s command send!\n",command);

    // Return TRUE to tell the event loop we want to be called again

    g_timeout_add (2000, (GSourceFunc)SendThenGet, bus);

    return FALSE;
}

int main (int argc, char **argv)
{
    GMainLoop *loop;
    DBusConnection *bus;
    DBusError error;

    /* Create a new event loop to run in */
    loop = g_main_loop_new (NULL, FALSE);

    /* Get a connection to the session bus */
    dbus_error_init(&error);
    bus = dbus_bus_get(DBUS_BUS_SESSION, &error);
    if (!bus) 
    {
        g_warning("Failed to connect to the D-BUS daemon: %s", error.message);
        dbus_error_free(&error);
        return 1;
    }

    /* Set up this connection to work in a GLib event loop */
    dbus_connection_setup_with_g_main (bus, NULL);

    /* listening to messages from all objects as no path is specified */
    dbus_bus_add_match(bus, "type='signal',interface='com.compal.ThreeGtoApp.Signal'", NULL);//
    dbus_connection_add_filter(bus, signal_filter, loop, NULL);

    g_timeout_add(2000, (GSourceFunc)SendThenGet, bus);

    /* Start the event loop */
    g_main_loop_run (loop);
    return 0;
}