Support direct socks proxy without ssh

tunsocks.sh

@@ -7,13 +7,19 @@ pidfile=${RUNTIME_DIRECTORY:-/tmp}/tunsocks.pid
 nsname="$1"
 device="tun${nsname}"
 ns="${nsname}ns"
-socketpath="/run/nnss-${nsname}/sock"
+
+if [ "$2" = use_env ];then
+		proxy="$SOCKS_PROXY"
+		shift
+else
+		proxy="socks5:///run/nnss-${nsname}/sock"
+fi
 
 setup()
 {
 		ip tuntap add mode tun dev "$device"
 
-		/usr/bin/tun2socks -device "$device" -proxy "socks5://$socketpath" &
+		/usr/bin/tun2socks -device "$device" -proxy "$proxy" &
 		echo "$!" > "$pidfile"
 		sleep 5