ProxyArp.java
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/*
* Copyright 2014 Open Networking Laboratory
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onosproject.proxyarp;
import static org.slf4j.LoggerFactory.getLogger;
import org.apache.felix.scr.annotations.Activate;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Deactivate;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.ReferenceCardinality;
import org.onlab.packet.Ethernet;
import org.onosproject.core.ApplicationId;
import org.onosproject.core.CoreService;
import org.onosproject.net.flow.DefaultTrafficSelector;
import org.onosproject.net.flow.TrafficSelector;
import org.onosproject.net.packet.PacketContext;
import org.onosproject.net.packet.PacketPriority;
import org.onosproject.net.packet.PacketProcessor;
import org.onosproject.net.packet.PacketService;
import org.onosproject.net.proxyarp.ProxyArpService;
import org.slf4j.Logger;
/**
* Sample reactive proxy arp application.
*/
@Component(immediate = true)
public class ProxyArp {
private final Logger log = getLogger(getClass());
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected PacketService packetService;
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected ProxyArpService proxyArpService;
private ProxyArpProcessor processor = new ProxyArpProcessor();
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected CoreService coreService;
private ApplicationId appId;
@Activate
public void activate() {
appId = coreService.registerApplication("org.onosproject.proxyarp");
packetService.addProcessor(processor, PacketProcessor.ADVISOR_MAX + 1);
TrafficSelector.Builder selectorBuilder =
DefaultTrafficSelector.builder();
selectorBuilder.matchEthType(Ethernet.TYPE_ARP);
packetService.requestPackets(selectorBuilder.build(),
PacketPriority.CONTROL, appId);
log.info("Started with Application ID {}", appId.id());
}
@Deactivate
public void deactivate() {
packetService.removeProcessor(processor);
processor = null;
log.info("Stopped");
}
/**
* Packet processor responsible for forwarding packets along their paths.
*/
private class ProxyArpProcessor implements PacketProcessor {
@Override
public void process(PacketContext context) {
// Stop processing if the packet has been handled, since we
// can't do any more to it.
if (context.isHandled()) {
return;
}
//handle the arp packet.
proxyArpService.handleArp(context);
}
}
}