H323_T120Channel Class Reference

#include <h323t120.h>

Inheritance diagram for H323_T120Channel:


Public Member Functions
virtual void	HandleChannel ()
Overrides from class H323Channel
virtual void	Receive ()
virtual void	Transmit ()
virtual PBoolean	OnSendingPDU (H245_OpenLogicalChannel &openPDU) const
virtual void	OnSendOpenAck (const H245_OpenLogicalChannel &open, H245_OpenLogicalChannelAck &ack) const
virtual PBoolean	OnReceivedPDU (const H245_OpenLogicalChannel &pdu, unsigned &errorCode)
virtual PBoolean	OnReceivedAckPDU (const H245_OpenLogicalChannelAck &pdu)
Protected Attributes
OpalT120Protocol *	t120handler

Detailed Description

This class describes the T.120 logical channel.

Constructor & Destructor Documentation

H323_T120Channel::H323_T120Channel	(	H323Connection &	connection,
		const H323Capability &	capability,
		Directions	direction,
		unsigned	sessionID
	)

Create a new channel.

Parameters:

connection	Connection to endpoint for channel
capability	Capability channel is using
direction	Direction of channel
sessionID	Session ID for channel

H323_T120Channel::H323_T120Channel	(	H323Connection &	connection,
		const H323Capability &	capability,
		Directions	direction,
		unsigned	sessionID
	)

Create a new channel.

Parameters:

connection	Connection to endpoint for channel
capability	Capability channel is using
direction	Direction of channel
sessionID	Session ID for channel

Member Function Documentation

virtual void H323_T120Channel::Receive ( ) [virtual]

Handle channel data reception.

This is called by the thread started by the Start() function and is typically a loop reading from the transport and handling PDU's.

The default behaviour here is to call HandleChannel()

virtual void H323_T120Channel::Transmit ( ) [virtual]

Handle channel data transmission.

This is called by the thread started by the Start() function and is typically a loop reading from the codec and writing to the transport (eg an RTP_session).

The default behaviour here is to call HandleChannel()

virtual PBoolean H323_T120Channel::OnSendingPDU ( H245_OpenLogicalChannel & openPDU ) const [virtual]

Fill out the OpenLogicalChannel PDU for the particular channel type.

Parameters:

openPDU

Open PDU to send.

Reimplemented from H323DataChannel.

virtual void H323_T120Channel::OnSendOpenAck	(	const H245_OpenLogicalChannel &	open,
		H245_OpenLogicalChannelAck &	ack
	)			const `[virtual]`

This is called when request to create a channel is received from a remote machine and is about to be acknowledged.

Parameters:

open	Open PDU
ack	Acknowledgement PDU

Reimplemented from H323DataChannel.

virtual PBoolean H323_T120Channel::OnReceivedPDU	(	const H245_OpenLogicalChannel &	pdu,
		unsigned &	errorCode
	)			`[virtual]`

This is called after a request to create a channel occurs from the local machine via the H245LogicalChannelDict::Open() function, and the request has been acknowledged by the remote endpoint.

The default makes sure the parameters are compatible and passes on the PDU to the rtp session.

Parameters:

pdu	Open PDU
errorCode	Error code on failure

Reimplemented from H323DataChannel.

virtual PBoolean H323_T120Channel::OnReceivedAckPDU ( const H245_OpenLogicalChannelAck & pdu ) [virtual]

This is called after a request to create a channel occurs from the local machine via the H245LogicalChannelDict::Open() function, and the request has been acknowledged by the remote endpoint.

The default makes sure the parameters are compatible and passes on the PDU to the rtp session.

Parameters:

pdu

Acknowledgement PDU

Reimplemented from H323DataChannel.

virtual void H323_T120Channel::HandleChannel ( ) [virtual]