/**
* Copyright 2011, Big Switch Networks, Inc.
* Originally created by David Erickson, Stanford University
*
* 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 net.floodlightcontroller.hub;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import net.floodlightcontroller.core.FloodlightContext;
import net.floodlightcontroller.core.IFloodlightProviderService;
import net.floodlightcontroller.core.IOFMessageListener;
import net.floodlightcontroller.core.IOFSwitch;
import net.floodlightcontroller.core.module.FloodlightModuleContext;
import net.floodlightcontroller.core.module.FloodlightModuleException;
import net.floodlightcontroller.core.module.IFloodlightModule;
import net.floodlightcontroller.core.module.IFloodlightService;
import org.openflow.protocol.OFMessage;
import org.openflow.protocol.OFPacketIn;
import org.openflow.protocol.OFPacketOut;
import org.openflow.protocol.OFPort;
import org.openflow.protocol.OFType;
import org.openflow.protocol.action.OFAction;
import org.openflow.protocol.action.OFActionOutput;
import org.openflow.util.U16;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* @author David Erickson (daviderickson@cs.stanford.edu) - 04/04/10
*/
public class Hub implements IFloodlightModule, IOFMessageListener {
protected static Logger log = LoggerFactory.getLogger(Hub.class);
protected IFloodlightProviderService floodlightProvider;
/**
* @param floodlightProvider the floodlightProvider to set
*/
public void setFloodlightProvider(IFloodlightProviderService floodlightProvider) {
this.floodlightProvider = floodlightProvider;
}
@Override
public String getName() {
return Hub.class.getPackage().getName();
}
public Command receive(IOFSwitch sw, OFMessage msg, FloodlightContext cntx) {
OFPacketIn pi = (OFPacketIn) msg;
OFPacketOut po = (OFPacketOut) floodlightProvider.getOFMessageFactory()
.getMessage(OFType.PACKET_OUT);
po.setBufferId(pi.getBufferId())
.setInPort(pi.getInPort());
// set actions
OFActionOutput action = new OFActionOutput()
.setPort(OFPort.OFPP_FLOOD.getValue());
po.setActions(Collections.singletonList((OFAction)action));
po.setActionsLength((short) OFActionOutput.MINIMUM_LENGTH);
// set data if is is included in the packetin
if (pi.getBufferId() == OFPacketOut.BUFFER_ID_NONE) {
byte[] packetData = pi.getPacketData();
po.setLength(U16.t(OFPacketOut.MINIMUM_LENGTH
+ po.getActionsLength() + packetData.length));
po.setPacketData(packetData);
} else {
po.setLength(U16.t(OFPacketOut.MINIMUM_LENGTH
+ po.getActionsLength()));
}
try {
sw.write(po, cntx);
} catch (IOException e) {
log.error("Failure writing PacketOut", e);
}
return Command.CONTINUE;
}
@Override
public boolean isCallbackOrderingPrereq(OFType type, String name) {
return false;
}
@Override
public boolean isCallbackOrderingPostreq(OFType type, String name) {
return false;
}
// IFloodlightModule
@Override
public Collection<Class<? extends IFloodlightService>> getModuleServices() {
// We don't provide any services, return null
return null;
}
@Override
public Map<Class<? extends IFloodlightService>, IFloodlightService>
getServiceImpls() {
// We don't provide any services, return null
return null;
}
@Override
public Collection<Class<? extends IFloodlightService>>
getModuleDependencies() {
Collection<Class<? extends IFloodlightService>> l =
new ArrayList<Class<? extends IFloodlightService>>();
l.add(IFloodlightProviderService.class);
return l;
}
@Override
public void init(FloodlightModuleContext context)
throws FloodlightModuleException {
floodlightProvider =
context.getServiceImpl(IFloodlightProviderService.class);
}
@Override
public void startUp(FloodlightModuleContext context) {
floodlightProvider.addOFMessageListener(OFType.PACKET_IN, this);
}
}