#!/bin/bash
# git clone https://github.com/mt08xx/vgc.git
# http://qiita.com/mt08/private/01f57f8a6658922755b3

IF_to=$1
IF_from=wlan0

if [ -z $IF_to ];then
    if ! pidof openvpn; then
        IF_to=eth0
    else
        IF_to=tun0
    fi
fi




echo $IF_from to $IF_to

sudo iptables -F
sudo iptables -t nat -F
sudo iptables -t nat -A POSTROUTING -o $IF_to -j MASQUERADE
sudo iptables -A FORWARD -i $IF_to -o $IF_from -m state --state RELATED,ESTABLISHED -j ACCEPT
sudo iptables -A FORWARD -i $IF_from -o $IF_to -j ACCEPT