concast.base
Class SpecBase

java.lang.Object
  |
  +--concast.base.SpecBase

public abstract class SpecBase

extends java.lang.Object

The main class that has to be extended to create the merge spec. 4 methods are described in the concast internet draft

Field Summary

UserAPI

userAPI This object can be used to call methods from the user API

Constructor Summary

SpecBase()

Method Summary

abstract PacketAndState	buildMsg(MergeState state) This function takes a MergeState and returns a datagram containing a transport header, and payload.
abstract boolean	checkAndDecrypt(ConcastPacket msg) This function takes a ConcastPacket, decrypts it and returns true if it was decrypted properly.
abstract boolean	done(MergeState state) The predicate done() on MergeState, which returns "true" when a datagram needs to be constructed and forwarded.
abstract long	getTag(ConcastPacket msg) This function determines the Datagram Equivalence Class to which a given packet belongs.
abstract void	merge(MergeState state, ConcastPacket msg) This function takes a MergeState, a concast datagram, and per-flow information and returns an updated MergeState.

Methods inherited from class java.lang.Object

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

Field Detail

userAPI

public UserAPI userAPI

This object can be used to call methods from the user API

Constructor Detail

SpecBase

public SpecBase()

Method Detail

getTag

public abstract long getTag(ConcastPacket msg)

This function determines the Datagram Equivalence Class to which a given packet belongs. Typically this function will extract a value from a particular location or locations in the datagram (header and/or payload). It might also compute a digest of the datagram's payload.

merge

public abstract void merge(MergeState state,
                           ConcastPacket msg)

This function takes a MergeState, a concast datagram, and per-flow information and returns an updated MergeState. This function does the real work of merging, combining information from an incoming datagram with information derived from previously processed datagrams.

done

public abstract boolean done(MergeState state)

The predicate done() on MergeState, which returns "true" when a datagram needs to be constructed and forwarded.

buildMsg

public abstract PacketAndState buildMsg(MergeState state)

This function takes a MergeState and returns a datagram containing a transport header, and payload.

checkAndDecrypt

public abstract boolean checkAndDecrypt(ConcastPacket msg)

This function takes a ConcastPacket, decrypts it and returns true if it was decrypted properly.