net.java.sip.communicator.impl.neomedia.transform.srtp
Class SRTPTransformer

java.lang.Object
  net.java.sip.communicator.impl.neomedia.transform.srtp.SRTPTransformer

All Implemented Interfaces:

PacketTransformer

public class SRTPTransformer
extends Object
implements PacketTransformer

SRTPTransformer implements PacketTransformer and provides implementations for RTP packet to SRTP packet transformation and SRTP packet to RTP packet transformation logic. It will first find the corresponding SRTPCryptoContext for each packet based on their SSRC and then invoke the context object to perform the transformation and reverse transformation operation.

Author:

Bing SU (nova.su@gmail.com)

Constructor Summary

SRTPTransformer(SRTPTransformEngine engine)
Initializes a new SRTPTransformer instance.

SRTPTransformer(SRTPTransformEngine forwardEngine, SRTPTransformEngine reverseEngine)
Constructs a SRTPTransformer object.

Method Summary

void	close() Closes this SRTPTransformer and the underlying transform engines.It closes all stored crypto contexts.
RawPacket	reverseTransform(RawPacket pkt) Reverse-transforms a specific packet (i.e.
RawPacket	transform(RawPacket pkt) Transforms a specific packet.

Methods inherited from class java.lang.Object

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

Constructor Detail

SRTPTransformer

public SRTPTransformer(SRTPTransformEngine engine)

Initializes a new SRTPTransformer instance.

Parameters:

engine - the SRTPTransformEngine to be used by the new instance for both directions

SRTPTransformer

public SRTPTransformer(SRTPTransformEngine forwardEngine,
                       SRTPTransformEngine reverseEngine)

Constructs a SRTPTransformer object.

Parameters:

forwardEngine - The associated SRTPTransformEngine object for forward transformations.

reverseEngine - The associated SRTPTransformEngine object for reverse transformations.

Method Detail

close

public void close()

Closes this SRTPTransformer and the underlying transform engines.It closes all stored crypto contexts. It deletes key data and forces a cleanup of the crypto contexts.

Specified by:

close in interface PacketTransformer

reverseTransform

public RawPacket reverseTransform(RawPacket pkt)

Reverse-transforms a specific packet (i.e. transforms a transformed packet back).

Specified by:

reverseTransform in interface PacketTransformer

Parameters:

pkt - the transformed packet to be restored

Returns:

the restored packet

transform

public RawPacket transform(RawPacket pkt)

Transforms a specific packet.

Specified by:

transform in interface PacketTransformer

Parameters:

pkt - the packet to be transformed

Returns:

the transformed packet