Implements encapsulated tunnel message construction for transmission.

TSender = class(TObject)

TSender is a class that implements support for construction of encapsulated tunnel messages for Indy Tunnel components. TIdTunnelMaster uses TSender to build message types, headers, and data for tunnel client connections.

Constructor for the object instance.

constructor Create;

Owner of the object instance.

Create is the constructor for the object instance, and relies on the inherited Create method. Create also initializes object properties for the CRC calculator and HeaderLen. Create allocates the buffer used for pMsg.

Free the object instance.

destructor Destroy; override;

Destroy is the destructor for the object instance. Destroy frees pMsg and the CRC calculator for the object instance prior to calling the inherited Destroy method.

Constructs an encapsulated tunnel message.

procedure PrepareMsg(var Header: TIdHeader; buffer: PChar; buflen: Integer);

Container for encapsulation headers.

Data for the message.

Number of bytes to be included in the message.

PrepareMsg is a procedure used to implement construction of the encapsulated tunnel message including headers with a CRC checksum value, and the message content.

Header is a container for the encapsulation headers for the message.

Buffer represents the message content used in the message construction.

BufLen is the number of bytes in Buffer to be included in the message.