#!/usr/bin/python

# This file is part of pulseaudio-dlna.

# pulseaudio-dlna 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 3 of the License, or
# (at your option) any later version.

# pulseaudio-dlna 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 pulseaudio-dlna.  If not, see <http://www.gnu.org/licenses/>.

from __future__ import unicode_literals

import commands
import re


def default_ipv4():
    status_code, result = commands.getstatusoutput('ip route get 255.255.255.255')
    if status_code == 0:
        match = re.findall(r"(?<=src )(\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3})", result)
        if match:
            return match[0]
    return None
