Add GRE tracker

omr-tracker/files/bin/omr-tracker-gre

@@ -0,0 +1,46 @@
+#!/bin/sh
+# vim: set noexpandtab tabstop=4 shiftwidth=4 softtabstop=4 :
+
+name=$0
+basename="$(basename $0)"
+
+_log() {
+	logger -p daemon.info -t "${basename}" "$@"
+}
+
+_ping_server() {
+	local host=$1
+	ret=$(ping \
+	    -w "$OMR_TRACKER_TIMEOUT" \
+	    -c 1 \
+	    -q \
+	    "${host}"
+	) && echo "$ret" | grep -sq " 0% packet loss" && {
+		server_ping=true
+	}
+}
+
+_ping_tunnel() {
+	local name=$1
+	config_get gateway $1 gateway
+	config_get ifname $1 ifname
+	config_get disabled $1 disabled
+	[ "$(echo $ifname | grep omrip)" != "" ] && [ -n "$gateway" ] && [ "$disabled" != "1" ] && {
+		_ping_server $gateway
+	}
+}
+
+. /lib/functions.sh
+
+timeout=${OMR_TRACKER_TIMEOUT:-5}
+interval=${OMR_TRACKER_INTERVAL:-10}
+intervaltries=${OMR_TRACKER_INTERVAL_TRIES:-2}
+retry=${OMR_TRACKER_TRIES:-4}
+waittest=${OMR_TRACKER_WAIT_TEST:-0}
+
+while true; do
+	server_ping=false
+	config_load network
+	config_foreach _ping_tunnel interface
+	sleep "${interval}"
+done