T959: XML/Python rewrite of "protocol igmp-proxy" and op-mode commands

Examples:
=========

CFG commands:

  vyos@vyos# set protocols igmp-proxy disable-quickleave
  vyos@vyos# set protocols igmp-proxy interface eth0 alt-subnet '172.16.35.0/24'
  vyos@vyos# set protocols igmp-proxy interface eth0 alt-subnet '172.31.0.0/24'
  vyos@vyos# set protocols igmp-proxy interface eth0 role 'upstream'
  vyos@vyos# set protocols igmp-proxy interface eth1 role 'downstream'

  vyos@vyos# show protocols
   igmp-proxy {
       disable-quickleave
       interface eth0 {
           alt-subnet 172.16.35.0/24
           alt-subnet 172.31.0.0/24
           role upstream
       }
       interface eth1 {
           role downstream
       }
   }

OP mode commands:
-----------------

  vyos@vyos:~$ show ip multicast interface
   Interface  BytesIn      PktsIn       BytesOut     PktsOut      Local
   eth0       0.0b         0            0.0b         0            xxx.xxx.xxx.65
   eth1       0.0b         0            0.0b         0            xxx.xxx.xx.201

  vyos@vyos:~$ show ip multicast mfc
  Group           Origin          Pkts         Bytes        Wrong   In      Out
  xxx.x.xx.1      xxx.xx.0.1      10           9.81KB       0       eth0    eth1
  xxx.x.xx.2      xxx.xx.0.1                                        --

1 files changed, 166 insertions, 0 deletions

diff --git a/src/etc/init.d/igmpproxy b/src/etc/init.d/igmpproxy
new file mode 100755
index 000000000..4a2c94a4d
--- /dev/null
+++ b/src/etc/init.d/igmpproxy
@@ -0,0 +1,166 @@
+#!/bin/sh
+### BEGIN INIT INFO
+# Provides:          igmpproxy
+# Required-Start:    $local_fs $network $remote_fs $syslog
+# Required-Stop:     $local_fs $network $remote_fs $syslog
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Short-Description: IGMP multicast routing daemon
+# Description:       IGMPproxy is a simple dynamic Multicast Routing Daemon
+#                    using only IGMP signalling. It's intended for simple
+#                    forwarding of Multicast traffic between networks.
+### END INIT INFO
+
+# Author: Pali Rohár <pali.rohar@gmail.com>
+
+# Do NOT "set -e"
+
+# PATH should only include /usr/* if it runs after the mountnfs.sh script
+PATH=/sbin:/usr/sbin:/bin:/usr/bin
+DESC="igmpproxy"
+NAME=igmpproxy
+DAEMON=/sbin/igmpproxy
+DAEMON_ARGS="/etc/igmpproxy.conf"
+PIDFILE=/var/run/$NAME.pid
+SCRIPTNAME=/etc/init.d/$NAME
+
+# Exit if the package is not installed
+[ -x "$DAEMON" ] || exit 0
+
+# Read configuration variable file if it is present
+[ -r /etc/default/$NAME ] && . /etc/default/$NAME
+
+# Load the VERBOSE setting and other rcS variables
+. /lib/init/vars.sh
+
+# Define LSB log_* functions.
+# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
+# and status_of_proc is working.
+. /lib/lsb/init-functions
+
+#
+# Function that starts the daemon/service
+#
+do_start()
+{
+	# Return
+	#   0 if daemon has been started
+	#   1 if daemon was already running
+	#   2 if daemon could not be started
+	start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
+		|| return 1
+	start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -b -m -- \
+		$DAEMON_OPTS $DAEMON_ARGS \
+		|| return 2
+	# The above code will not work for interpreted scripts, use the next
+	# six lines below instead (Ref: #643337, start-stop-daemon(8) )
+	#start-stop-daemon --start --quiet --pidfile $PIDFILE --startas $DAEMON \
+	#	--name $NAME --test > /dev/null \
+	#	|| return 1
+	#start-stop-daemon --start --quiet --pidfile $PIDFILE --startas $DAEMON \
+	#	--name $NAME -- $DAEMON_ARGS \
+	#	|| return 2
+
+	# Add code here, if necessary, that waits for the process to be ready
+	# to handle requests from services started subsequently which depend
+	# on this one.  As a last resort, sleep for some time.
+}
+
+#
+# Function that stops the daemon/service
+#
+do_stop()
+{
+	# Return
+	#   0 if daemon has been stopped
+	#   1 if daemon was already stopped
+	#   2 if daemon could not be stopped
+	#   other if a failure occurred
+	start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name $NAME
+	RETVAL="$?"
+	[ "$RETVAL" = 2 ] && return 2
+	# Wait for children to finish too if this is a daemon that forks
+	# and if the daemon is only ever run from this initscript.
+	# If the above conditions are not satisfied then add some other code
+	# that waits for the process to drop all resources that could be
+	# needed by services started subsequently.  A last resort is to
+	# sleep for some time.
+	start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON
+	[ "$?" = 2 ] && return 2
+	# Many daemons don't delete their pidfiles when they exit.
+	rm -f $PIDFILE
+	return "$RETVAL"
+}
+
+#
+# Function that sends a SIGHUP to the daemon/service
+#
+do_reload() {
+	#
+	# If the daemon can reload its configuration without
+	# restarting (for example, when it is sent a SIGHUP),
+	# then implement that here.
+	#
+	start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME
+	return 0
+}
+
+case "$1" in
+  start)
+	[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC " "$NAME"
+	do_start
+	case "$?" in
+		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
+		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
+	esac
+	;;
+  stop)
+	[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
+	do_stop
+	case "$?" in
+		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
+		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
+	esac
+	;;
+  status)
+	status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
+	;;
+  #reload|force-reload)
+	#
+	# If do_reload() is not implemented then leave this commented out
+	# and leave 'force-reload' as an alias for 'restart'.
+	#
+	#log_daemon_msg "Reloading $DESC" "$NAME"
+	#do_reload
+	#log_end_msg $?
+	#;;
+  restart|force-reload)
+	#
+	# If the "reload" option is implemented then remove the
+	# 'force-reload' alias
+	#
+	log_daemon_msg "Restarting $DESC" "$NAME"
+	do_stop
+	case "$?" in
+	  0|1)
+		do_start
+		case "$?" in
+			0) log_end_msg 0 ;;
+			1) log_end_msg 1 ;; # Old process is still running
+			*) log_end_msg 1 ;; # Failed to start
+		esac
+		;;
+	  *)
+		# Failed to stop
+		log_end_msg 1
+		;;
+	esac
+	;;
+  *)
+	#echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
+	echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
+	exit 3
+	;;
+esac
+
+: