openmptcprouter-feeds/mptcp/files/usr/share/omr/post-tracking.d/post-tracking

# vim: set ft=sh noexpandtab tabstop=4 shiftwidth=4 softtabstop=4 :

SETROUTE=false
set_route() {
	local multipath_config interface_gw interface_if
	INTERFACE=$1
	multipath_config=$(uci -q get "network.$INTERFACE.multipath" || echo "off")
	multipath_current_config=$(multipath $INTERFACE | grep deactivated)
	if [ "$multipath_config" != "off" ] && [ "$SETROUTE" != true ] && [ "$multipath_current_config" = "" ]; then
	#if [ "$multipath_config" != "off" ] && [ "$SETROUTE" != true ]; then
		interface_gw=$(uci -q get "network.$INTERFACE.gateway")
		interface_if=$(uci -q get "network.$INTERFACE.ifname")
		_log "Replace default route by $interface_gw dev $interface_if"
		ip route replace default scope global nexthop via $interface_gw dev $interface_if && SETROUTE=true
	fi
}


# Get the current multipath status
multipath_status="off"
case "$(multipath "$OMR_TRACKER_DEVICE")" in
	*default*)      multipath_status="on"       ;;
	*backup*)       multipath_status="backup"   ;;
	*handover*)     multipath_status="handover" ;;
esac

default_gw=$(ip route show default | grep -v metric | awk '/default/ {print $3}')
current_interface_gw=$(uci -q get "network.$OMR_TRACKER_INTERFACE.gateway")

# An interface in error will never be used in MPTCP
if [ "$OMR_TRACKER_STATUS" = "ERROR" ]; then
	#[ "$multipath_status" = "off" ] && exit 0
	#_log "$OMR_TRACKER_DEVICE switched off"
	multipath "$OMR_TRACKER_DEVICE" off
	if [ "$default_gw" = "$current_interface_gw" ] || [ "$default_gw" = "" ]; then
		config_load network
		config_foreach set_route interface
	fi
	exit 0
fi

multipath_config=$(uci -q get "network.$OMR_TRACKER_INTERFACE.multipath" || echo "off")
[ "$multipath_config" = "master" ] && [ "$multipath_status" = "on" ] && exit 0
[ "$multipath_status" = "$multipath_config" ] && exit 0
_log "$OMR_TRACKER_DEVICE switched to $multipath_config"
if [ "$multipath_config" = "master" ]; then
	if [ "$default_gw" != "$current_interface_gw" ] || [ "$default_gw" = "" ]; then
		_log "Master up : Replace default route by $current_interface_gw dev $OMR_TRACKER_INTERFACE"
		ip route replace default scope global nexthop via $current_interface_gw dev $OMR_TRACKER_INTERFACE
	fi
	multipath_config="on"
fi
multipath "$OMR_TRACKER_DEVICE" "$multipath_config"