Package org.jitsi.impl.neomedia.transform.dtls

Class DtlsPacketTransformer

java.lang.Object

org.jitsi.impl.neomedia.transform.dtls.DtlsPacketTransformer

All Implemented Interfaces:

PropertyChangeListener, EventListener, PacketTransformer

public class DtlsPacketTransformer
extends Object
implements PacketTransformer, PropertyChangeListener

Implements PacketTransformer for DTLS-SRTP. It's capable of working in pure DTLS mode if appropriate flag was set in DtlsControlImpl.

Author:

Lyubomir Marinov

Constructor Summary

Constructors

Constructor	Description
DtlsPacketTransformer(DtlsTransformEngine transformEngine, int componentID)	Initializes a new DtlsPacketTransformer instance.

Method Summary

Modifier and Type	Method	Description
void	close()	Closes this PacketTransformer i.e.
static boolean	isDtlsRecord(byte[] buf, int off, int len)	Determines whether a specific array of bytes appears to contain a DTLS record.
void	propertyChange(PropertyChangeEvent ev)
RawPacket[]	reverseTransform(RawPacket[] pkts)	Reverse-transforms each packet in an array of packets.
void	sendApplicationData(byte[] buf, int off, int len)	Sends the data contained in a specific byte array as application data through the DTLS connection of this DtlsPacketTransformer.
RawPacket[]	transform(RawPacket[] pkts)	Transforms each packet in an array of packets.

Methods inherited from class java.lang.Object

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

Constructor Detail

DtlsPacketTransformer

public DtlsPacketTransformer(DtlsTransformEngine transformEngine,
                             int componentID)

Initializes a new DtlsPacketTransformer instance.

Parameters:

transformEngine - the TransformEngine which is initializing the new instance

componentID - the ID of the component for which the new instance is to work

Method Detail

isDtlsRecord

public static boolean isDtlsRecord(byte[] buf,
                                   int off,
                                   int len)

Determines whether a specific array of bytes appears to contain a DTLS record.

Parameters:

buf - the array of bytes to be analyzed

off - the offset within buf at which the analysis is to start

len - the number of bytes within buf starting at off to be analyzed

Returns:

true if the specified buf appears to contain a DTLS record

close

public void close()

Closes this PacketTransformer i.e. releases the resources allocated by it and prepares it for garbage collection.

Specified by:

close in interface PacketTransformer

propertyChange

public void propertyChange(PropertyChangeEvent ev)

Specified by:

propertyChange in interface PropertyChangeListener

reverseTransform

public RawPacket[] reverseTransform(RawPacket[] pkts)

Reverse-transforms each packet in an array of packets. Null values must be ignored.

Specified by:

reverseTransform in interface PacketTransformer

Parameters:

pkts - the transformed packets to be restored.

Returns:

the restored packets.

sendApplicationData

public void sendApplicationData(byte[] buf,
                                int off,
                                int len)

Sends the data contained in a specific byte array as application data through the DTLS connection of this DtlsPacketTransformer.

Parameters:

buf - the byte array containing data to send.

off - the offset in buf where the data begins.

len - the length of data to send.

transform

public RawPacket[] transform(RawPacket[] pkts)

Transforms each packet in an array of packets. Null values must be ignored.

Specified by:

transform in interface PacketTransformer

Parameters:

pkts - the packets to be transformed

Returns:

the transformed packets