drcl.inet.contract
Class McastHostEvent

java.lang.Object
  drcl.comp.Contract
      drcl.inet.contract.McastHostEvent

public class McastHostEvent

extends Contract

The McastHostEvent contract. This contract defines the message format in a multicast host event (a join or leave event). The event is delivered to a multicast routing protocol component to handle the event when a host joins or leaves a multicast group.

The event object is a message consisting of:

1. Event type: (JOIN or LEAVE),
2. Multicast group: the host network joins/leaves,
3. Index of the interface: at which that host network is connected to this router. The index may be less than zero if the router is multihomed and it joins/leaves itself.

This class provides a set of static methods to faciliate constructing the event object (createJoinEvent()s and createLeaveEvent()s).

Version:

1.0, 12/03/2000

Author:

Hung-ying Tyan

Nested Class Summary

static class

McastHostEvent.Message

Field Summary

static McastHostEvent	INSTANCE
static int	JOIN
static int	LEAVE

Fields inherited from class drcl.comp.Contract

Role_INITIATOR, Role_PEER, Role_REACTOR

Constructor Summary

McastHostEvent()

McastHostEvent(int role_)

Method Summary

static McastHostEvent.Message	createJoinEvent(long group_, int ifindex_) Returns the JOIN event message.
static McastHostEvent.Message	createJoinEvent(long src_, long group_, int ifindex_) Returns the JOIN event message.
static McastHostEvent.Message	createJoinEvent(long src_, long srcmask_, long group_, int ifindex_) Returns the JOIN event message.
static McastHostEvent.Message	createLeaveEvent(long group_, int ifindex_) Returns the LEAVE event message.
static McastHostEvent.Message	createLeaveEvent(long src_, long group_, int ifindex_) Returns the LEAVE event message.
static McastHostEvent.Message	createLeaveEvent(long src_, long srcmask_, long group_, int ifindex_) Returns the LEAVE event message.
java.lang.Object	getContractContent() Returns the content of this contract (format?).
java.lang.String	getName()

Methods inherited from class drcl.comp.Contract

getRole, match, setRole

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final McastHostEvent INSTANCE

JOIN

public static final int JOIN

See Also:

Constant Field Values

LEAVE

public static final int LEAVE

See Also:

Constant Field Values

Constructor Detail

McastHostEvent

public McastHostEvent()

McastHostEvent

public McastHostEvent(int role_)

Method Detail

getName

public java.lang.String getName()

Specified by:

getName in class Contract

getContractContent

public java.lang.Object getContractContent()

Description copied from class: Contract

Returns the content of this contract (format?).

Specified by:

getContractContent in class Contract

createJoinEvent

public static McastHostEvent.Message createJoinEvent(long group_,
                                                     int ifindex_)

Returns the JOIN event message.

createJoinEvent

public static McastHostEvent.Message createJoinEvent(long src_,
                                                     long group_,
                                                     int ifindex_)

Returns the JOIN event message.

createJoinEvent

public static McastHostEvent.Message createJoinEvent(long src_,
                                                     long srcmask_,
                                                     long group_,
                                                     int ifindex_)

Returns the JOIN event message.

createLeaveEvent

public static McastHostEvent.Message createLeaveEvent(long group_,
                                                      int ifindex_)

Returns the LEAVE event message.

createLeaveEvent

public static McastHostEvent.Message createLeaveEvent(long src_,
                                                      long group_,
                                                      int ifindex_)

Returns the LEAVE event message.

createLeaveEvent

public static McastHostEvent.Message createLeaveEvent(long src_,
                                                      long srcmask_,
                                                      long group_,
                                                      int ifindex_)

Returns the LEAVE event message.