Class FingerprintAttribute

The FINGERPRINT attribute MAY be present in all STUN messages. The value of the attribute is computed as the CRC-32 of the STUN message up to (but excluding) the FINGERPRINT attribute itself, XOR'ed with the 32-bit value 0x5354554e (the XOR helps in cases where an application packet is also using CRC-32 in it). The 32-bit CRC is the one defined in ITU V.42 [ITU.V42.2002], which has a generator polynomial of x32+x26+x23+x22+x16+x12+x11+x10+x8+x7+x5+x4+x2+x+1. When present, the FINGERPRINT attribute MUST be the last attribute in the message, and thus will appear after MESSAGE-INTEGRITY.

Inheritance
System.Object
Attribute
FingerprintAttribute
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
Namespace: FM.LiveSwitch.Stun
Assembly: FM.LiveSwitch.dll
Syntax
public class FingerprintAttribute : Attribute

Constructors

FingerprintAttribute()

Initializes a new instance of the FingerprintAttribute class.

Declaration
public FingerprintAttribute()

Properties

MessageBuffer

Gets or sets the message buffer.

Declaration
public DataBuffer MessageBuffer { get; set; }
Property Value
Type Description
DataBuffer

TypeValue

Gets the type value.

Declaration
public override int TypeValue { get; }
Property Value
Type Description
System.Int32
Overrides

Methods

GetValueLength()

Gets the length of the attribute value.

Declaration
protected override int GetValueLength()
Returns
Type Description
System.Int32
Overrides

ReadValueFrom(DataBuffer, Int32, DataBuffer)

Initializes a new instance of the FingerprintAttribute class.

Declaration
public static FingerprintAttribute ReadValueFrom(DataBuffer buffer, int offset, DataBuffer messageBuffer)
Parameters
Type Name Description
DataBuffer buffer

The buffer.
System.Int32 offset

The offset.
DataBuffer messageBuffer

The message buffer thus far.
Returns
Type Description
FingerprintAttribute

ToString()

Returns a string that represents this instance.

Declaration
public override string ToString()
Returns
Type Description
System.String

A string that represents this instance.
Overrides
System.Object.ToString()

WriteValueTo(DataBuffer, Int32)

Writes the attribute value to a data buffer.

Declaration
protected override void WriteValueTo(DataBuffer buffer, int offset)
Parameters
Type Name Description
DataBuffer buffer

The buffer.
System.Int32 offset

The offset.
Overrides