#!/bin/sh

# Post-Install script for openvpn

# Copyright (C)2020-2024, Philip Munts dba Munts Technologies.
#
# Redistribution and use in source and binary forms, with or without
# 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.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.

# Scan libraries

linklibs
ldconfig

if [ ! -f /usr/local/etc/openvpn.conf ]; then
cat <<EOD >/usr/local/etc/openvpn.conf
user nobody
group nogroup
daemon
dev tun0
remote fake.bogus.net
ifconfig 10.0.1.2 10.0.1.1
auth-nocache
secret /usr/local/etc/openvpn.key
inactive 0
ping 5
ping-restart 60
persist-tun
persist-key
EOD
chmod 444 /usr/local/etc/openvpn.conf
fi

if [ ! -f /usr/local/etc/openvpn.key ]; then
cat <<EOD >/usr/local/etc/openvpn.key
Replace this file with a key file.
EOD
chmod 400 /usr/local/etc/openvpn.key
fi

grep -q tun0 /etc/network.conf

if [ $? -ne 0 ]; then
echo "" >>/etc/network.conf
echo "# OpenVPN tunnel configuration" >>/etc/network.conf
echo "" >>/etc/network.conf
echo tun0_address=10.0.1.2 >>/etc/network.conf
echo tun0_netmask=255.255.255.255 >>/etc/network.conf
fi