Togglable VPN Payload (#26)

Based on the default VPN payload; this can now create a VPN-connection to an OpenVPN-server, or if the button is pressed, send traffic from the clients through said tunnel. This way no editing of the payload is required to switch modes. On boot the Squirrel will wait for a button press for 10 seconds, if it is pressed, the VPN will launch in client mode, if it is not pressed in the interval it will launch in remote-access mode instead.

payloads/library/remote-access/Togglable-VPN/payload.sh

@@ -0,0 +1,61 @@
+#!/bin/bash
+# 
+# Title:		Togglable-VPN
+# Description:	Based on the default VPN payload; this can now create a VPN-connection to an OpenVPN-server, 
+#				or if the button is pressed, send traffic from the clients through said tunnel.
+#				This way no editing of the payload is required to switch modes. 
+#				On boot the Squirrel will wait for a button press for 10 seconds, if it is pressed, the VPN will 
+#				launch in client mode, if it is not pressed in the interval it will launch in remote-access mode.
+# Author: 		DannyK999
+# Credit:		Credit to Hak5 for original VPN payload.
+# Version:		1.0
+# Category: 	remote-access
+# Target: 		Any
+# Net Mode:		BRIDGE, VPN
+
+DNS_SERVER="8.8.8.8"
+
+# Cheap hack to set the DNS server
+function setdns() {
+	while true
+	do
+		[[ ! $(grep -q "$DNS_SERVER" /tmp/resolv.conf) ]] && {
+			echo -e "search lan\nnameserver $DNS_SERVER" > /tmp/resolv.conf
+		}
+		sleep 5
+	done
+}
+
+function start() {
+	LED SETUP
+
+	DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+
+	# Check for button press to see whether to set NETMODE to BRIDGE or VPN 
+	# and wait 3 seconds to ensure that things can settle
+
+	BUTTON 10s && {
+		/usr/bin/NETMODE VPN
+	} || {
+		/usr/bin/NETMODE BRIDGE
+	}
+	sleep 3
+
+	# Make OpenVPN use the local configuration
+	uci set openvpn.vpn.config="${DIR}/config.ovpn"
+	uci commit
+
+	# Start the OpenVPN server in the background
+	/etc/init.d/openvpn start
+
+	# Start SSH Server
+	/etc/init.d/sshd start &
+
+	# Set DNS server
+	setdns &
+
+	LED ATTACK
+}
+
+# Start the payload
+start &