tinc-up.sh

#!/bin/sh
# Author: p4u
# Licence: GPLv3

DIRECT="78.47.184.98 109.69.8.124 176.9.216.199 176.9.216.193 84.88.85.62
202.83.95.227 85.126.4.170 141.1.1.1 95.210.254.9 95.210.254.8"

DEFAULT="172.30.33.20"
MYIP="172.30.33.12"
IFNAME="dabax"
RESOLV=""

net() {
    ip addr add $MYIP/24 dev $INTERFACE
    ip link set $INTERFACE up
    #ip route add 10.0.0.0/8 via $DEFAULT
    iptables -t nat -I POSTROUTING -o $IFNAME -j SNAT --to $MYIP
}

setgw() {
    echo "Changing gateway..."
    default="$(ip r | grep ^default | cut -d" " -f3)"
    echo $default > /tmp/tinc.default.gw

    [ -n "$RESOLV" ] && {
        dns="$(cat /etc/resolv.conf | grep ^nameserver | cut -d" " -f2)"
        for d in $dns; do ip r add $d via $default; done
    }

    for D in $DIRECT; do
        ip r add $D via $default
    done

    ip r del default via $DEFAULT
    ip r del default via $default
    ip r add default via $default metric 500
    ip r add default via $DEFAULT metric 100
}

net
[ -f "/vpn" ] && setgw

exit 0