adding first version of the plugin for Mac OS Server VPN Daemon

plugins/network/dar_vpnd

@@ -0,0 +1,44 @@
+#!/usr/bin/env perl
+# -*- perl -*-
+
+=head1 NAME
+
+dar_vpnd a Plugin for displaying VPN Stats for the Darwin (MacOS) vpnd Service.
+
+=head1 INTERPRETATION
+
+The Plugin displays the number of active VPN connections.
+
+=head1 CONFIGURATION
+
+No Configuration necessary!
+
+=head1 AUTHOR
+
+Philipp Haussleiter <philipp@haussleiter.de> (email)
+
+=head1 LICENSE
+
+GPLv2
+
+=cut
+
+# MAIN
+use warnings;
+use strict;
+
+
+my $cmd = "ps -ef | awk '/[p]ppd/ {print substr(\$NF,2);}' | wc -l";
+
+if ( exists $ARGV[0] and $ARGV[0] eq "config" ) {
+	print "graph_category VPN\n";
+	print "graph_args --base 1024 -r --lower-limit 0\n";	
+	print "graph_title Number of VPN Connections\n";
+	print "graph_vlabel VPN Connections\n";
+	print "graph_info The Graph shows the Number of VPN Connections\n";	
+	print "connections.label Number of VPN Connections\n";
+	print "connections.type GAUGE\n";			
+} else {
+	my $output = `$cmd`;
+	print "connections.value $output";
+}