#!/bin/bash
#
# This file is part of Sailfish SDK
#
# Copyright (C) 2020 Open Mobile Platform LLC.
# Contact: Ville Nummela <ville.nummela@jolla.com>
# All rights reserved.
#
# You may use this file under the terms of BSD license as follows:
#
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# modification, are permitted provided that the following conditions are met:
#   * Redistributions of source code must retain the above copyright
#     notice, this list of conditions and the following disclaimer.
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#     documentation and/or other materials provided with the distribution.
#   * Neither the name of the Jolla Ltd nor the
#     names of its contributors may be used to endorse or promote products
#     derived from this software without specific prior written permission.
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DEF_EMULATOR_IP=172.17.0.1

EMULATOR_IP=$(getent hosts host.docker.internal |awk '{ print $1 }')

if [[ ! $EMULATOR_IP ]]; then
    EMULATOR_IP=$DEF_EMULATOR_IP
fi

CHAIN=dnat-emulators

iptables -t nat --new-chain "$CHAIN"

# FIXME breaks when the port is later changed by user
for ((i=0; i<20; i++)); do
    iptables -t nat -A "$CHAIN" -p tcp -d 10.220.220.$((1+i)) --dport 22 -j DNAT \
        --to-destination $EMULATOR_IP:$((2223+i))
done

iptables -t nat -I OUTPUT -j "$CHAIN"
