#!/bin/bash

set -e
set -x

base="$( cd "$(dirname "$0")" ; pwd -P )"

id="$1"
public_ip="$2"
public_iface="$3"

if [ -z "$public_iface" ]; then
    echo >&2 "usage: $0 ctid public_ip public_iface"
    exit 1
fi

$base/remove_public_route "$id" "$public_ip" "$public_iface" || true

docker_ip=$(docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $id)

if [ -n "$docker_ip" ]; then
    iptables -t nat -A PREROUTING -d $public_ip/32 -i $public_iface -j DNAT --to-destination $docker_ip
fi

exit 0