#!/bin/sh

export PATH="/sbin:/usr/sbin:/bin:/usr/bin:/usr/builtin/sbin:/usr/builtin/bin:/usr/local/sbin:/usr/local/bin:/opt/sbin:/opt/bin"

TAILSCALED="/usr/local/sbin/tailscaled"
PIDFILE="/var/run/tailscaled.pid"

# Extra flags you might want to pass to tailscaled.
FLAGS="--tun=userspace-networking"

mkdir -p /var/run/tailscale/ /usr/local/lib/tailscale
mkdir -p /dev/net
mknod /dev/net/tun c 10 200
chmod 777 /dev/net/tun

start-stop-daemon \
    --start --background \
    --exec $TAILSCALED \
    --make-pidfile \
    --pidfile "$PIDFILE" \
    -- \
    --statedir=/usr/local/lib/tailscale/ \
    --state=/usr/local/lib/tailscale/tailscaled.state \
    --socket=/var/run/tailscale/tailscaled.sock $FLAGS

# sleep 5
if ! grep -q 'net.ipv4.ip_forward' /etc/sysctl.conf ; then
    echo 'net.ipv4.ip_forward = 1' >> /etc/sysctl.conf
fi
if ! grep -q 'net.ipv6.conf.all.forwarding' /etc/sysctl.conf ; then
    echo 'net.ipv6.conf.all.forwarding = 1' >> /etc/sysctl.conf
fi

sysctl -p /etc/sysctl.conf