add openwrt-wireguard example

hypd/examples/openwrt-wireguard/openwireguard.sh

@@ -0,0 +1,24 @@
+#!/bin/sh
+
+if [ $# -lt 1 ]; then
+    echo "Usage: $0 <srcip>"
+    exit 1
+fi
+
+# Can't use dots in rule name, so swap for underscores
+# example: 10.69.69.100 changes to hypd_10_69_69_100_wireguard
+rulename="hypd_${1//./_}_wireguard"
+
+# Configure the rule in OpenWRT's uci interface
+uci set firewall.$rulename=redirect
+uci set firewall.$rulename.dest=lan
+uci set firewall.$rulename.target=DNAT
+uci set firewall.$rulename.name=$rulename
+uci set firewall.$rulename.src=wan
+uci set firewall.$rulename.src_dport=51820
+uci set firewall.$rulename.dest_ip=10.0.100.1
+uci set firewall.$rulename.dest_port=51820
+uci set firewall.$rulename.src_ip=$1
+uci add_list firewall.$rulename.proto=udp
+uci commit firewall
+service firewall restart