Class SrtpTransformer

SRTPTransformer implements IPacketTransformer 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.

Inheritance

object

SrtpTransformer

Implements

IPacketTransformer

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: SipLib.Dtls

Assembly: SipLib.dll

Syntax

public class SrtpTransformer : IPacketTransformer

Constructors

SrtpTransformer(SrtpTransformEngine)

Constructor

Declaration

public SrtpTransformer(SrtpTransformEngine engine)

Parameters

Type	Name	Description
SrtpTransformEngine	engine

SrtpTransformer(SrtpTransformEngine, SrtpTransformEngine)

Constructor

Declaration

public SrtpTransformer(SrtpTransformEngine forwardEngine, SrtpTransformEngine reverseEngine)

Parameters

Type	Name	Description
SrtpTransformEngine	forwardEngine
SrtpTransformEngine	reverseEngine

Methods

Close()

Close the transformer and underlying transform engine.

Declaration

public void Close()

ReverseTransform(byte[])

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

Declaration

public byte[] ReverseTransform(byte[] pkt)

Parameters

Type	Name	Description
byte[]	pkt	The transformed packet to be restored

Returns

Type	Description
byte[]	The restored packet

ReverseTransform(byte[], int, int)

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

Declaration

public byte[] ReverseTransform(byte[] pkt, int offset, int length)

Parameters

Type	Name	Description
byte[]	pkt	The packet to be restored
int	offset	The offset to the packet data
int	length	The length of data in the packet

Returns

Type	Description
byte[]	The restored packet

Transform(byte[])

Transforms a non-secure packet.

Declaration

public byte[] Transform(byte[] pkt)

Parameters

Type	Name	Description
byte[]	pkt	The packet to be transformed

Returns

Type	Description
byte[]	Returns the transformed packet. Returns null if the packet cannot be transformed.

Transform(byte[], int, int)

Transforms a specific non-secure packet.

Declaration

public byte[] Transform(byte[] pkt, int offset, int length)

Parameters

Type	Name	Description
byte[]	pkt	The packet to be secured
int	offset	The offset of the packet data
int	length	The length of the packet data

Returns

Type	Description
byte[]	Returns the transformed packet. Returns null if the packet cannot be transformed.

Implements

IPacketTransformer