org.onlab.packet

Class IGMPGroup

java.lang.Object

org.onlab.packet.IGMPGroup

Direct Known Subclasses:

IGMPMembership, IGMPQuery

public abstract class IGMPGroup
extends Object

A class to represent Groups for membership query and reports.

Field Summary

Fields

Modifier and Type	Field and Description
protected int	auxInfo
protected IpAddress	gaddr
protected List<IpAddress>	sources

Constructor Summary

Constructors

Constructor and Description
IGMPGroup()
IGMPGroup(IpAddress gaddr, int auxInfo) Initialize this object with a multicast group address and additional info.

Method Summary

Modifier and Type	Method and Description
void	addSource(IpAddress saddr) Add a unicast source address to this message.
abstract IGMPGroup	deserialize(ByteBuffer bb) Deserialize an IGMPQuery or IGMPMembership message.
int	getAuxInfo() Get the auxillary info.
IpAddress	getGaddr() Get the multicast group address.
List<IpAddress>	getSources() Return the list of source addresses.
abstract byte[]	serialize(ByteBuffer bb) Serialize the IGMPGroup subclass.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

auxInfo

protected int auxInfo

gaddr

protected IpAddress gaddr

sources

protected List<IpAddress> sources

Constructor Detail

IGMPGroup

public IGMPGroup()

IGMPGroup

public IGMPGroup(IpAddress gaddr,
                 int auxInfo)

Initialize this object with a multicast group address and additional info.

Parameters:

gaddr: - the multicast group address for this message type.

auxInfo: - additional info potentially used by IGMPQuery

Method Detail

getGaddr

public IpAddress getGaddr()

Get the multicast group address.

Returns:

the group address

getAuxInfo

public int getAuxInfo()

Get the auxillary info.

Returns:

the auxillary info

addSource

public void addSource(IpAddress saddr)

Add a unicast source address to this message.

Parameters:

saddr - IPv4 unicast source address

getSources

public List<IpAddress> getSources()

Return the list of source addresses.

Returns:

list of source addresses

deserialize

public abstract IGMPGroup deserialize(ByteBuffer bb)
                               throws DeserializationException

Deserialize an IGMPQuery or IGMPMembership message.

Parameters:

bb - the ByteBuffer wrapping the serialized message. The position of the ByteBuffer should be pointing at the head of either message type.

Returns:

An object populated with the respective IGMPGroup subclass

Throws:

DeserializationException - in case deserialization goes wrong

serialize

public abstract byte[] serialize(ByteBuffer bb)

Serialize the IGMPGroup subclass.

Parameters:

bb - the ByteBuffer to write into, positioned at the next spot to be written to.

Returns:

The serialized message