drcl.inet.contract
Class RTLookup

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

public class RTLookup

extends Contract

The RouteLookup contract. This contract defines the following service at the reactor:

RouteLookup

The initiator sends a key (RTKey), an InetPacket, or a message that consists of an InetPacket and the incoming interface (int), and the reactor returns the outgoing interfaces (int[]) of the correspoding routing entry, the key of which has the longest match to the given key/packet.

This class also provides the static methods (lookup(RTKey, Port)), (lookup(InetPacket, Port)), and (lookup(InetPacket, incomingIf, Port)) to facilitate conducting the above service from the specified port. The method is particularly useful in implementing a protocol that needs to look up the outgoing ports of a routing entry.

Version:

1.0, 10/17/2000, 2.0, 11/2002

Author:

Hung-ying Tyan

See Also:

for the description of the longest match., RTKey, RTEntry, InetPacket

Nested Class Summary

static class

RTLookup.Message

Field Summary

static RTLookup

INSTANCE

Fields inherited from class drcl.comp.Contract

Role_INITIATOR, Role_PEER, Role_REACTOR

Constructor Summary

RTLookup()

RTLookup(int role_)

Method Summary

java.lang.Object	getContractContent() Returns the content of this contract (format?).
java.lang.String	getName()
static int[]	lookup(InetPacket ipkt_, int incomingIf_, Port out_)
static int[]	lookup(InetPacket ipkt_, Port out_)
static int[]	lookup(RTKey key_, Port out_)

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 RTLookup INSTANCE

Constructor Detail

RTLookup

public RTLookup()

RTLookup

public RTLookup(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

lookup

public static int[] lookup(RTKey key_,
                           Port out_)

lookup

public static int[] lookup(InetPacket ipkt_,
                           Port out_)

lookup

public static int[] lookup(InetPacket ipkt_,
                           int incomingIf_,
                           Port out_)