mwan3: fix bugs introduced in 815e83d4

Fixes the following bugs introduced in commit 815e83d4:
 - hotplug: invalid parameter order when initial interface state is "online",
   mwan3track expects initial state to be the third argument
 - hotplug: missing source ip address when initial interface state is "offline"
 - mwan3track: source ip address should be the fourth argument

Signed-off-by: Marcin Jurkowski <marcin1j@gmail.com>

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

@@ -68,13 +68,13 @@ case "$ACTION" in
 		if [ ${running} -eq 1 -a "${status}" = "online" ]; then
 			mwan3_create_iface_rules $INTERFACE $DEVICE
 			mwan3_create_iface_route $INTERFACE $DEVICE
-			mwan3_track $INTERFACE $DEVICE ${src_ip} "online"
+			mwan3_track $INTERFACE $DEVICE "online" "$src_ip"
 			mwan3_set_policies_iptables
 			mwan3_set_user_rules
 			mwan3_flush_conntrack $INTERFACE $DEVICE "ifup"
 		else
 			$LOG notice "Starting tracker on interface $INTERFACE (${DEVICE:-unknown})"
-			mwan3_track $INTERFACE $DEVICE "offline"
+			mwan3_track $INTERFACE $DEVICE "offline" "$src_ip"
 		fi
 	;;
 	ifdown)

net/mwan3/files/usr/sbin/mwan3track

@@ -52,6 +52,7 @@ main() {
 	INTERFACE=$1
 	DEVICE=$2
 	STATUS=$3
+	SRC_IP=$4
 	mkdir -p /var/run/mwan3track/$1
 	trap clean_up SIGINT SIGTERM
 	trap if_down SIGUSR1
@@ -93,11 +94,11 @@ main() {
 		for track_ip in $track_ips; do
 			case "$track_method" in
 				ping)
-					ping -I $2 -c $count -W $timeout -s $size -q $track_ip &> /dev/null ;;
+					ping -I $DEVICE -c $count -W $timeout -s $size -q $track_ip &> /dev/null ;;
 				arping)
-					arping -I $2 -c $count -w $timeout -q $track_ip &> /dev/null ;;
+					arping -I $DEVICE -c $count -w $timeout -q $track_ip &> /dev/null ;;
 				httping)
-					httping -y $3 -c $count -t $timeout -q $track_ip &> /dev/null ;;
+					httping -y $SRC_IP -c $count -t $timeout -q $track_ip &> /dev/null ;;
 			esac
 			if [ $? -eq 0 ]; then
 				let host_up_count++