/**
 * This file is part of Rubanetra.
 * Copyright (C) 2013,2014 Stefan Swerk (stefan_rubanetra@swerk.priv.at)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
import at.jku.fim.rubanetra.protocol.activity.*;
import at.jku.fim.rubanetra.protocol.activity.tls.*;
import at.jku.fim.rubanetra.protocol.activity.http.*;
import at.jku.fim.rubanetra.protocol.activity.ip.*;
import at.jku.fim.rubanetra.protocol.activity.icmp.*;
import org.xbill.DNS.*;
import org.jnetpcap.protocol.network.Icmp.IcmpCode;
import org.jnetpcap.protocol.network.Icmp.IcmpType;

// using the MVEL expression language, see http://mvel.codehaus.org/
dialect  "mvel"

/**
 * A logger that may be used for logging custom messages
 */
global org.slf4j.Logger log;

/**
 * Groups ICMP echo requests and echo replies to a PingActivity
 */
rule "Ping (Icmpv4)"
when
	$req : Icmpv4Activity( $id : identifier,  $seq : sequence,  icmpType == IcmpType.ECHO_REQUEST)
	$rep : Icmpv4Activity( identifier == $id, sequence == $seq, icmpType == IcmpType.ECHO_REPLY)
	
	not (exists PingActivity(request == $req || reply == $rep))
then
	insert(new PingActivity($req, $rep));
end