Iodine Scripts

run_iodine_client.sh

#!/bin/bash
# Author: https://gist.github.com/mrjk/
# License: MIT

IODINE_PASS=mypass
IODINE_DOMAIN=t.mydomain.org
IODINE_GW=10.18.0.1
IODINE_FORWARD=true

IODINE_SERVER=w.x.y.z

get_default_gw ()
{
	ip route | grep ^default | awk '{ print $3 }' | head -n 1
}

apply_routes ()
{
	# WAit for tunnel to be ready
	echo "INFO: Waiting for $IODINE_GW ..."
	while ! timeout 0.2 ping -c 1 -n $IODINE_GW &> /dev/null
	do
	    echo "INFO: Waiting for $IODINE_GW ..."
	done

	# Apply default route
	echo "INFO: Creating default routes via $IODINE_GW -> $IODINE_SERVER"
	ip route add $IODINE_SERVER via $GW
	ip route del default via $GW
	ip route add default via $IODINE_GW
	echo "INFO: Default route has been changed!"
}

restore_routes ()
{
	echo -e "\nINFO: Restoring default routes from $IODINE_GW to $GW"
	ip route del $IODINE_SERVER via $GW
	ip route del default 2>/dev/null
	ip route add default via $GW
	echo "INFO: Default route has been restored to $GW!"
}

main ()
{

	if $IODINE_FORWARD; then
		# Get current default gateway
		GW=$(get_default_gw)
		if [[ -z "$GW" ]]; then
			echo "ERROR: Can't find default gateway :/"
			return 1
		fi

		# Wrap tunnel functions
		apply_routes &
		trap restore_routes EXIT
	fi

	# Start tunnel
	echo "INFO: Starting iodine client on $IODINE_DOMAIN"
	iodine -f -P $IODINE_PASS $IODINE_DOMAIN
}

main $@

run_iodine_server.sh

#!/bin/bash
# Author: https://gist.github.com/mrjk/
# License: MIT

IODINE_PASS=mypass
IODINE_DOMAIN=t.mydomain.org
IODINE_GW=10.18.0.1
IODINE_FORWARD=true

IODINE_MASK=28
IODINE_INTERFACE=eno1

enable_forwarding ()
{
	echo "INFO: Enabling forwarding"
	echo 1 > /proc/sys/net/ipv4/ip_forward
	iptables -t nat -A POSTROUTING -o $IODINE_INTERFACE -s $IODINE_GW/$IODINE_MASK -j MASQUERADE

}

disable_forwarding ()
{
	echo "INFO: Disabling forwarding"
	iptables -t nat -D POSTROUTING -o $IODINE_INTERFACE -s $IODINE_GW/$IODINE_MASK -j MASQUERADE
}

main ()
{
	if $IODINE_FORWARD; then
		enable_forwarding &
		trap disable_forwarding EXIT
	fi
	
	# Start server
	echo "INFO: Starting iodine"
	iodined -f -c -P $IODINE_PASS $IODINE_GW $IODINE_DOMAIN
}

main $@