#!/usr/bin/env python
# -*- Mode: python; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
#
# 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.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Copyright (C) 2011 - 2012 Red Hat, Inc.
#

import dbus, sys

# This example indicates whether the default network connection is known to be WWAN

NM_DEVICE_TYPE_MODEM = 8
NM_DEVICE_TYPE_BLUETOOTH = 5
NM_SERVICE_NAME = "org.freedesktop.NetworkManager"
NM_MANAGER_IFACE = "org.freedesktop.NetworkManager"
DBUS_PROPS_IFACE = "org.freedesktop.DBus.Properties"

bus = dbus.SystemBus()

# Exit early if NetworkManager is not running
proxy = bus.get_object("org.freedesktop.DBus", "/org/freedesktop/DBus")
busdaemon = dbus.Interface(proxy, "org.freedesktop.DBus")
if not busdaemon.NameHasOwner(NM_SERVICE_NAME):
    print "NetworkManager not running"
    sys.exit(1)

# Get a proxy for the NetworkManager object
proxy = bus.get_object(NM_SERVICE_NAME, "/org/freedesktop/NetworkManager")
manager = dbus.Interface(proxy, NM_MANAGER_IFACE)
props = dbus.Interface(proxy, DBUS_PROPS_IFACE)

default_is_wwan = False

# Look through all active network connections for the default one
active = props.Get(NM_MANAGER_IFACE, "ActiveConnections")
for a in active:
    a_proxy = bus.get_object(NM_SERVICE_NAME, a)
    a_props = dbus.Interface(a_proxy, DBUS_PROPS_IFACE)
    all_props = a_props.GetAll("org.freedesktop.NetworkManager.Connection.Active")

    # Ignore this network connection if it's not default for IPv4 or IPv6
    if all_props["Default"] == False and all_props["Default6"] == False:
        continue

    # Shortcut: check for Type property (only present in NM 0.9.9+)
    try:
        ctype = all_props["Type"]
        if ctype in ["gsm", "cdma", "bluetooth"]:
            default_is_wwan = True
            break
    except KeyError:
        # Fall back to checking the type of the network connection's device
        dev_path = all_props["Devices"][0]
        dev_proxy = bus.get_object(NM_SERVICE_NAME, dev_path)
        dev_props = dbus.Interface(dev_proxy, DBUS_PROPS_IFACE)
        devtype = dev_props.Get("org.freedesktop.NetworkManager.Device", "DeviceType")
        if devtype == NM_DEVICE_TYPE_MODEM or devtype == NM_DEVICE_TYPE_BLUETOOTH:
            default_is_wwan = True
            break

if default_is_wwan:
    print "WWAN is default"
else:
    print "WWAN is not default"