#!/usr/bin/env python
#
# vim: ft=python ts=4 sts=4 sw=4 et ai
# -*- 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) 2014 Red Hat, Inc.
#

import sys, socket, struct
from gi.repository import GLib, GObject, NetworkManager, NMClient

def update_addresses(cfg, device):
    addresses = cfg.get_addresses()
    if not len(addresses):
        return

    print "(%s) IPv4 addresses" % device.get_iface()
    for iaddr in addresses:
        addr = iaddr.get_address()
        prefix = iaddr.get_prefix()
        gateway = iaddr.get_gateway()

        addr_struct = struct.pack("=I", addr)
        gateway_struct = struct.pack("=I", gateway)
        print("    %s/%d  %s") % (socket.inet_ntop(socket.AF_INET, addr_struct),
                              prefix,
                              socket.inet_ntop(socket.AF_INET, gateway_struct))

def notify_addresses(cfg, property, device):
    update_addresses(cfg, device)

def notify_ip4_config(device, property):
    print "(%s) notify IP4Config (state %d)" % (device.get_iface(), device.get_state())
    old_cfg = device.current_ip4_config
    # disconnect old signal handler
    if old_cfg:
        old_cfg.disconnect_by_func(notify_addresses)

    new_cfg = device.get_ip4_config()
    device.current_ip4_config = new_cfg
    if new_cfg:
        new_cfg.connect('notify::addresses', notify_addresses, device)
        update_addresses(new_cfg, device)

if __name__ == "__main__":
    c = NMClient.Client.new()
    for device in c.get_devices():
        print "Connecting to %s" % device.get_iface()
        device.current_ip4_config = None
        device.connect('notify::ip4-config', notify_ip4_config)

    loop = GLib.MainLoop()
    loop.run()