Shell script for setting up PIA openvpn profiles on OpenWrt

openvpn.sh

#!/bin/sh

OVPN_DIR="/etc/openvpn"

install() {
	BASE_PATH=https://www.privateinternetaccess.com/openvpn/
	FILE_NAME=openvpn

	if [ "$1" ]; then
		FILE_NAME=$FILE_NAME-"$1"
	fi

	cd $OVPN_DIR

	wget "$BASE_PATH$FILE_NAME.zip"
	
	if [ -e "$FILE_NAME.zip" ]; then
		echo "Clearing existing files"
		rm *.ovpn
		rm *.auth

		clear

		opkg install unzip
	
		unzip "$FILE_NAME.zip"
	
		opkg remove unzip
	else
		echo "Download failed"
		exit 1
	fi

	cd -

	exit 0
}

setup() {
	OVPN_DEV="tun0"
	OVPN_USER=$1
	OVPN_PASSWD=$2

	if [ ! "$1" ]; then
		echo "vpn user:"
		read OVPN_USER
	fi

	if [ ! "$2" ]; then
		echo "vpn password:"
		read OVPN_PASSWD
	fi

	cd $OVPN_DIR

	for fname in *.ovpn; do
		echo "Configuring ${fname}"

		newfname=$(echo $fname|sed -r 's|\s+||g')
		authfname=$(echo $newfname| sed 's|ovpn|auth|')

		sed -i -e "
/^dev .*/s/^dev .*$/dev ${OVPN_DEV}/
/^auth-user-pass/s/^auth-user-pass.*$/auth-user-pass $authfname/
/^script-security/d
\$a script-security 2
/^up/d
\$a up /etc/openvpn/updown.sh
/^down/d
\$a down /etc/openvpn/updown.sh
" "${fname}"


		echo $OVPN_USER > "$authfname"
		echo $OVPN_PASSWD >> "$authfname"
		mv "$fname" "$newfname"
	done


	cd -

	exit 0
}

enable() {
	configpath=$OVPN_DIR/"$1.ovpn"
	if [ -e $configpath ]; then
		echo "Disabling existing VPNs"
		uci show openvpn | grep enabled | awk -F= '{print "uci delete "$1}' | sh

		echo "Enabling $1"
		uci set openvpn."$1"=openvpn
		uci set openvpn."$1".config="$configpath"
		uci set openvpn."$1".enabled=1
		
		echo "Saving changes:"
		uci changes

		echo ""

		uci commit


		/etc/init.d/openvpn restart
		exit 0
	else
		echo "Config file for $1 not found"
		echo ""
		echo "Options are:"
		echo $(ls $OVPN_DIR/*.ovpn| sed -r 's|.*vpn/(.*)\..*|\1|')
		echo ""
		echo "Currently active:"
		echo $(uci show openvpn | grep enabled | awk -F. '/\w+/{print $2}')
		exit 1
	fi
}

clear() {
	echo "Clearing all existing profiles"
	echo ""
	echo '' > /etc/config/openvpn

	/etc/init.d/openvpn restart
}

case $1 in
	install)
		shift
		install $@
		;;
	setup)
		shift
 		setup $@
		;;
	enable)
		shift
		enable $@
		;;
	clear)
		clear
		;;
	*)
		echo "Options are:"
		echo ""
		echo "    install: downloads new profiles from vpn provider and unpacks them"
		echo "    setup: configures files from default provided by vpn provider"
		echo "    enable: enables given file"
		echo "    clear: removes all VPN entries"
		;;
esac

updown.sh

#!/bin/sh

dns() {
	DNS1="$1"
	DNS2="$2"

	uci -q delete dhcp.@dnsmasq[0].server
	uci add_list dhcp.@dnsmasq[0].server="${DNS1}"
	uci add_list dhcp.@dnsmasq[0].server="${DNS2}"
	uci commit dhcp
	/etc/init.d/dnsmasq restart
}


case ${script_type} in
(up) dns "209.222.18.222" "209.222.18.218" ;;
(down) dns "8.8.8.8" "4.4.4.4" ;;
esac