Merge pull request #4629 from marcin1j/pr/20170725-mwan3-tracking-methods

mwan3: support various interface tracking methods

net/mwan3/Makefile

@@ -8,8 +8,8 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mwan3
-PKG_VERSION:=2.5.3
+PKG_VERSION:=2.6
-PKG_RELEASE:=5
+PKG_RELEASE:=1
 PKG_MAINTAINER:=Florian Eckert <fe@dev.tdt.de>
 PKG_LICENSE:=GPLv2
 

net/mwan3/files/etc/hotplug.d/iface/15-mwan3

@@ -23,15 +23,19 @@ if [ "$ACTION" == "ifup" ]; then
 		ubus call network.interface.${INTERFACE}_4 status &>/dev/null
 		if [ "$?" -eq "0" ]; then
 			network_get_gateway gateway ${INTERFACE}_4
+			network_get_ipaddr src_ip ${INTERFACE}_4
 		else
 			network_get_gateway gateway $INTERFACE
+			network_get_ipaddr src_ip ${INTERFACE}
 		fi
 	elif [ "$family" = "ipv6" ]; then
 		ubus call network.interface.${INTERFACE}_6 status &>/dev/null
 		if [ "$?" -eq "0" ]; then
 			network_get_gateway6 gateway ${INTERFACE}_6
+			network_get_ipaddr6 src_ip ${INTERFACE}_6
 		else
 			network_get_gateway6 gateway ${INTERFACE}
+			network_get_ipaddr6 src_ip ${INTERFACE}
 		fi
 	fi
 
@@ -48,7 +52,7 @@ case "$ACTION" in
 		mwan3_create_iface_rules $INTERFACE $DEVICE
 		mwan3_create_iface_iptables $INTERFACE $DEVICE
 		mwan3_create_iface_route $INTERFACE $DEVICE
-		mwan3_track $INTERFACE $DEVICE
+		mwan3_track $INTERFACE $DEVICE ${src_ip}
 		mwan3_set_policies_iptables
 		mwan3_set_user_rules
 		mwan3_flush_conntrack $INTERFACE $DEVICE "ifup"

net/mwan3/files/lib/mwan3/mwan3.sh

@@ -400,7 +400,7 @@ mwan3_track()
 
 	kill $(pgrep -f "mwan3track $1") &> /dev/null
 	if [ -n "$track_ips" ]; then
-		[ -x /usr/sbin/mwan3track ] && /usr/sbin/mwan3track $1 $2 $track_ips &
+		[ -x /usr/sbin/mwan3track ] && /usr/sbin/mwan3track "$1" "$2" "$3" $track_ips &
 	fi
 }
 

net/mwan3/files/usr/sbin/mwan3track

@@ -24,6 +24,30 @@ if_down() {
 	IFDOWN_EVENT=1
 }
 
+validate_track_method() {
+	case "$1" in
+		ping)
+			# Assume that ping is installed
+			;;
+		arping)
+			which arping 1>/dev/null 2>&1 || {
+				$LOG warn "Missing arping. Please install iputils-arping package."
+				return 1
+			}
+			;;
+		httping)
+			which httping 1>/dev/null 2>&1 || {
+				$LOG warn "Missing httping. Please install httping package."
+				return 1
+			}
+			;;
+		*)
+			$LOG warn "Unsupported tracking method: $track_method"
+			return 2
+			;;
+	esac
+}
+
 main() {
 	local reliability count timeout interval failure_interval
 	local recovery_interval down up size
@@ -37,6 +61,11 @@ main() {
 	trap if_down SIGUSR1
 
 	config_load mwan3
+	config_get track_method $1 track_method ping
+	validate_track_method $track_method || {
+		$LOG warn "Using ping to track interface $INTERFACE avaliability"
+		track_method=ping
+	}
 	config_get reliability $1 reliability 1
 	config_get count $1 count 1
 	config_get timeout $1 timeout 4
@@ -48,7 +77,7 @@ main() {
 	config_get recovery_interval $1 recovery_interval $interval
 
 	local score=$(($down+$up))
-	local track_ips=$(echo $* | cut -d ' ' -f 3-99)
+	local track_ips=$(echo $* | cut -d ' ' -f 4-99)
 	local host_up_count=0
 	local lost=0
 	local sleep_time=0
@@ -60,7 +89,14 @@ main() {
 		sleep_time=$interval
 
 		for track_ip in $track_ips; do
-			ping -I $2 -c $count -W $timeout -s $size -q $track_ip &> /dev/null
+			case "$track_method" in
+				ping)
+					ping -I $2 -c $count -W $timeout -s $size -q $track_ip &> /dev/null ;;
+				arping)
+					arping -I $2 -c $count -w $timeout -q $track_ip &> /dev/null ;;
+				httping)
+					httping -y $3 -c $count -t $timeout -q $track_ip &> /dev/null ;;
+			esac
 			if [ $? -eq 0 ]; then
 				let host_up_count++
 				echo "up" > /var/run/mwan3track/$1/TRACK_${track_ip}