mcastmngr: fix mcast stats for non broadcom platforms

Script for generating mcast stats is moved from common to platform
specific files. The logic for generating mcast stats on non broadcom
platforms is different and the stats format is also different.

For generating stats we are are sending SIGUSR1 signal to mcproxy
process which then writes multicast stats to /tmp/igmp_snooping_stats.

mcastmngr/files/linux/usr/libexec/rpcd/mcast

@@ -0,0 +1,151 @@
+#!/bin/sh
+
+. /usr/share/libubox/jshn.sh
+. /lib/functions.sh
+
+read_mcast_stats() {
+
+	temp_igmp_file='/tmp/igmp_stats_'$$
+	# Sending signal to mcproxy to dump multicast data in /tmp/igmp_snooping_stats
+	mcast_pids=$(pidof mcproxy)
+	for pid in $mcast_pids
+	do
+		$(kill -10 $pid)
+	done
+	cat /tmp/igmp_snooping_stats > temp_igmp_file
+
+	local mcast_addrs=""
+	local ifaces=""
+
+	while read line; do
+	# reading each line
+		case $line in
+		br-*)
+			found_iface=0
+			snoop_iface="$(echo $line | awk -F ' ' '{ print $1 }')"
+			if [ -z "$ifaces" ]; then
+				ifaces="$snoop_iface"
+				continue
+			fi
+
+			IFS=" "
+			for ifx in $ifaces; do
+				if [ $ifx == $snoop_iface ]; then
+					found_iface=1
+					break
+				fi
+			done
+
+			if [ $found_iface -eq 0 ]; then
+				ifaces="$ifaces $snoop_iface"
+				continue
+			fi
+			;;
+		esac
+	done < temp_igmp_file
+
+	while read line; do
+	# reading each line
+		case $line in
+		br-*)
+			found_ip=0
+			grp_ip="$(echo $line | awk -F ' ' '{ print $2 }')"
+			if [ -z "$mcast_addrs" ]; then
+				mcast_addrs="$grp_ip"
+				continue
+			fi
+
+			IFS=" "
+			for ip_addr in $mcast_addrs; do
+				if [ $ip_addr == $grp_ip ]; then
+					found_ip=1
+					break
+				fi
+			done
+
+			if [ $found_ip -eq 0 ]; then
+				mcast_addrs="$mcast_addrs $grp_ip"
+				continue
+			fi
+			;;
+		esac
+	done < temp_igmp_file
+
+	json_init
+	json_add_array "snooping"
+	json_add_object ""
+	IFS=" "
+	for intf in $ifaces; do
+		while read line; do
+		# reading each line
+			case $line in
+			br-*)
+				snoop_iface="$(echo $line | awk -F ' ' '{ print $1 }')"
+				if [ "$snoop_iface" != "$intf" ]; then
+					continue
+				fi
+				json_add_string "interface" "$intf"
+				json_add_array "groups"
+				break
+				;;
+			esac
+		done < temp_igmp_file
+		IFS=" "
+		for gip_addr in $mcast_addrs; do
+			grp_obj_added=0
+			while read line; do
+			# reading each line
+				case $line in
+				br-*)
+					snoop_iface="$(echo $line | awk -F ' ' '{ print $1 }')"
+					if [ "$snoop_iface" != "$intf" ]; then
+						continue
+					fi
+					grp_ip="$(echo $line | awk -F ' ' '{ print $2 }')"
+					if [ "$grp_ip" != "$gip_addr" ]; then
+						continue
+					fi
+					if [ $grp_obj_added -eq 0 ]; then
+						json_add_object ""
+						gip="$(ipcalc.sh $gip_addr | grep IP | awk '{print substr($0,4)}')"
+						json_add_string "groupaddr" "$gip"
+						json_add_array "clients"
+						grp_obj_added=1
+					fi
+
+					json_add_object ""
+					host_ip="$(echo $line | awk -F ' ' '{ print $3 }')"
+					h_ip="$(ipcalc.sh $host_ip | grep IP | awk '{print substr($0,4)}')"
+					json_add_string "ipaddr" "$h_ip"
+					src_port="$(echo $line | awk -F ' ' '{ print $4 }')"
+					json_add_string "device" "$src_port"
+					timeout="$(echo $line | awk -F ' ' '{ print $5 }')"
+					json_add_int "timeout" "$timeout"
+					json_close_object #close the associated device object
+					;;
+				esac
+			done < temp_igmp_file
+			json_close_array #close the associated devices array
+			json_close_object # close the groups object
+		done # close the loop for group addresses
+		json_close_array #close the groups array
+	done # close the loop for interfaces
+	json_close_object # close the snooping object
+	json_close_array # close the snooping array
+	json_dump
+
+	rm -f temp_igmp_file
+}
+
+case "$1" in
+	list)
+		echo '{ "stats":{} }'
+		;;
+	call)
+		case "$2" in
+			stats)
+				read_mcast_stats
+				;;
+		esac
+		;;
+esac