# TODO
# 1. Ask for listen port
# 2. Ask for name of eth interface

apt-get update
apt-get upgrade -y
apt-get install -y raspberrypi-kernel-headers
echo "deb http://deb.debian.org/debian/ unstable main" | sudo tee /etc/apt/sources.list.d/unstable.list
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 8B48AD6246925553
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 7638D0442B90D010
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 04EE7237B7D453EC
printf 'Package: *\nPin: release a=unstable\nPin-Priority: 150\n' | sudo tee /etc/apt/preferences.d/limit-unstable
apt update
apt install -y wireguard qrencode

cat > /etc/sysctl.conf <<EOF
net.ipv4.ip_forward=1
net.ipv6.conf.all.forwarding=1
EOF

cd /etc/wireguard
umask 077
export PRIVKEY=$(wg genkey)
echo $PRIVKEY | tee privatekey | wg pubkey | tee publickey
echo $PRIVKEY | tee --append /etc/wireguard/wg0.conf
cat > /etc/wireguard/wg0.conf <<EOF
[Interface]
Address = 10.10.0.1/24
Address = fd86:ea04:1111::1/64
SaveConfig = true
PostUp = iptables -A FORWARD -i wg0 -j ACCEPT; iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE; ip6tables -A FORWARD -i wg0 -j ACCEPT; ip6tables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
PostDown = iptables -D FORWARD -i wg0 -j ACCEPT; iptables -t nat -D POSTROUTING -o eth0 -j MASQUERADE; ip6tables -D FORWARD -i wg0 -j ACCEPT; ip6tables -t nat -D POSTROUTING -o eth0 -j MASQUERADE
ListenPort = 51820
PrivateKey = $PRIVKEY
EOF

sysctl -p
wg-quick up wg0
wg