mcastmngr: fixed mcproxy crash

Fixed mcproxy crash during bootup for non broadcom platforms

mcastmngr/files/common/etc/hotplug.d/iface/mcast.hotplug

@@ -20,7 +20,12 @@ compare_mcast_proxy_upstream() {
 
 	for dev in $upstream; do
 		if [ "$l3device" == "$dev" ]; then
+			running=$(ubus call service list '{"name": "mcast"}' | jsonfilter -e '@.mcast.instances')
+			if [ -z "${running}" ];then
+				/etc/init.d/mcast start
+			else
 				ubus call uci commit '{"config":"mcast"}'
+			fi
 			exit
 		fi
 	done

mcastmngr/files/linux/lib/mcast/linux.sh

@@ -1,6 +1,7 @@
 #!/bin/sh
 
 . /lib/mcast/common.sh
+. /lib/functions/network.sh
 
 include /lib/network
 
@@ -95,6 +96,7 @@ config_mcproxy_instance() {
 	local exceptions=
 	local upstreams=
 	local downstreams=
+	local intf_has_ip=
 
 	CONFFILE=/var/etc/mcproxy_"$protocol".conf
 	rm -f $CONFFILE
@@ -157,7 +159,40 @@ config_mcproxy_instance() {
 	[ -n "$upstreams" ] && [ -n "$downstreams" ] &&
 		config_mcproxy_interfaces "$upstreams" "$downstreams" "$exceptions"
 
+	# In case on proxy, upstreams is a list. Iterating and running the mcproxy
+	# for each valid upstream interface
+	for upstream_device in $upstreams;
+	do
+		# Read the upstream interface for the upstream device
+		# upstream device can have multiple logical interfaces like wan and wan6
+		# but same l3 device
+		local upstream_ifaces=$(get_network_of $upstream_device)
+
+		for iface in $upstream_ifaces;
+		do
+			if [ "$protocol" == "igmp" ]; then
+				network_get_ipaddr upstream_ip $iface
+				if [ ! -z "${upstream_ip}" ]; then
+					intf_has_ip=1
+					break
+				fi
+			fi
+
+			if [ "$protocol" == "mld" ]; then
+				network_get_ipaddr6 upstream_ip $iface
+				if [ ! -z "${upstream_ip}" ]; then
+					intf_has_ip=1
+					break
+				fi
+			fi
+		done
+
+		if [ -z "${intf_has_ip}" ]; then
+			continue
+		fi
+
 		PROG_PARAMS="${PROG_PARAMS} -f ${CONFFILE}${PROG_PARAMS_SEPARATOR}"
+	done
 }
 
 config_mcproxy() {
@@ -203,4 +238,8 @@ configure_mcast() {
 	read_mcast_snooping_params
 	read_mcast_proxy_params
 	config_mcproxy
+
+	if [ -z "${PROG_PARAMS}" ]; then
+		exit 0
+	fi
 }