drcl.inet.contract
Class DatagramContract

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

public class DatagramContract

extends Contract

The datagram sending/delivery contract. This contract defines the data exchange formats between two protocol layers that use datagrams. Specifically, the contract defines the following message format:

1. the packet to be sent (Object),
2. the source address (long),
3. the destination address (long),
4. the port (int), and
5. the type of service (long).

When sending a datagram, one may specify the source address as Address.NULL_ADDR to have the lower layer to put in an appropriate address for the upper layer.

Version:

1.0, 10/17/2000

Author:

Hung-ying Tyan

Nested Class Summary

static class

DatagramContract.Message

Field Summary

static DatagramContract

INSTANCE

Fields inherited from class drcl.comp.Contract

Role_INITIATOR, Role_PEER, Role_REACTOR

Constructor Summary

DatagramContract()

DatagramContract(int role_)

Method Summary

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 DatagramContract INSTANCE

Constructor Detail

DatagramContract

public DatagramContract()

DatagramContract

public DatagramContract(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