IGMPGroup.java
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/*
* Copyright 2015 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.onlab.packet;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
/**
* A class to represent Groups for membership query and reports.
*/
public abstract class IGMPGroup {
protected int auxInfo;
protected IpAddress gaddr;
protected List<IpAddress> sources = new ArrayList<>();
public IGMPGroup() {
}
/**
* Initialize this object with a multicast group address and additional info.
*
* @param gaddr: the multicast group address for this message type.
* @param auxInfo: additional info potentially used by IGMPQuery
*/
public IGMPGroup(IpAddress gaddr, int auxInfo) {
this.gaddr = gaddr;
this.auxInfo = auxInfo;
}
/**
* Get the multicast group address.
*
* @return the group address
*/
public IpAddress getGaddr() {
return this.gaddr;
}
/**
* Get the auxillary info.
*
* @return the auxillary info
*/
public int getAuxInfo() {
return this.auxInfo;
}
/**
* Add a unicast source address to this message.
*
* @param saddr IPv4 unicast source address
*/
public void addSource(IpAddress saddr) {
sources.add(saddr);
}
/**
* Return the list of source addresses.
*
* @return list of source addresses
*/
public List<IpAddress> getSources() {
return sources;
}
/**
* Deserialize an IGMPQuery or IGMPMembership message.
*
* @param bb the ByteBuffer wrapping the serialized message. The position of the
* ByteBuffer should be pointing at the head of either message type.
* @return An object populated with the respective IGMPGroup subclass
* @throws DeserializationException in case deserialization goes wrong
*/
public abstract IGMPGroup deserialize(ByteBuffer bb) throws DeserializationException;
/**
* Serialize the IGMPGroup subclass.
*
* @param bb the ByteBuffer to write into, positioned at the next spot to be written to.
* @return The serialized message
*/
public abstract byte[] serialize(ByteBuffer bb);
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("[");
sb.append("auxInfo= ");
sb.append(auxInfo);
sb.append("gaddr= ");
sb.append(gaddr);
sb.append("sources= ");
sb.append(sources.toString());
sb.append("]");
return sb.toString();
}
}