H323Connection Class Reference

#include <h323con.h>

Inheritance diagram for H323Connection:

OpalConnection List of all members.

Control Channel

enum  ControlProtocolErrors {
  e_MasterSlaveDetermination, e_CapabilityExchange, e_LogicalChannel, e_ModeRequest,
  e_RoundTripDelay
}
virtual BOOL CreateOutgoingControlChannel (const H225_TransportAddress &h245Address)
virtual BOOL CreateIncomingControlChannel (H225_TransportAddress &h245Address)
virtual BOOL WriteControlPDU (const H323ControlPDU &pdu)
virtual BOOL StartControlNegotiations ()
virtual void HandleControlChannel ()
virtual BOOL HandleControlData (PPER_Stream &strm)
virtual BOOL HandleControlPDU (const H323ControlPDU &pdu)
virtual BOOL OnUnknownControlPDU (const H323ControlPDU &pdu)
virtual BOOL OnH245Request (const H323ControlPDU &pdu)
virtual BOOL OnH245Response (const H323ControlPDU &pdu)
virtual BOOL OnH245Command (const H323ControlPDU &pdu)
virtual BOOL OnH245Indication (const H323ControlPDU &pdu)
virtual BOOL OnH245_SendTerminalCapabilitySet (const H245_SendTerminalCapabilitySet &pdu)
virtual BOOL OnH245_FlowControlCommand (const H245_FlowControlCommand &pdu)
virtual BOOL OnH245_MiscellaneousCommand (const H245_MiscellaneousCommand &pdu)
virtual BOOL OnH245_MiscellaneousIndication (const H245_MiscellaneousIndication &pdu)
virtual BOOL OnH245_JitterIndication (const H245_JitterIndication &pdu)
virtual BOOL OnControlProtocolError (ControlProtocolErrors errorSource, const void *errorData=NULL)
virtual void OnSendCapabilitySet (H245_TerminalCapabilitySet &pdu)
virtual BOOL OnReceivedCapabilitySet (const H323Capabilities &remoteCaps, const H245_MultiplexCapability *muxCap, H245_TerminalCapabilitySetReject &reject)
virtual void SendCapabilitySet (BOOL empty)
virtual void OnSetLocalCapabilities ()
BOOL IsH245Master () const
void StartRoundTripDelay ()
PTimeInterval GetRoundTripDelay () const

Public Member Functions

virtual BOOL OnSendFeatureSet (unsigned, H225_FeatureSet &) const
virtual void OnReceiveFeatureSet (unsigned, const H225_FeatureSet &) const
virtual BOOL OnOpenIncomingMediaChannels ()
Overrides from OpalConnection
virtual BOOL SetUpConnection ()
virtual BOOL SetAlerting (const PString &calleeName, BOOL withMedia)
virtual BOOL SetConnected ()
virtual void OnSendARQ (H225_AdmissionRequest &arq)
virtual BOOL SetProgressed ()
virtual void OnEstablished ()
virtual void OnReleased ()
virtual PString GetDestinationAddress ()
virtual OpalMediaFormatList GetMediaFormats () const
virtual BOOL OpenSourceMediaStream (const OpalMediaFormatList &mediaFormats, unsigned sessionID)
virtual OpalMediaStreamCreateMediaStream (const OpalMediaFormat &mediaFormat, unsigned sessionID, BOOL isSource)
void OnPatchMediaStream (BOOL isSource, OpalMediaPatch &patch)
virtual BOOL IsMediaBypassPossible (unsigned sessionID) const
virtual BOOL GetMediaInformation (unsigned sessionID, MediaInformation &info) const
Backward compatibility functions
virtual void OnCleared ()
BOOL IsEstablished () const
virtual void CleanUpOnCallEnd ()
Signalling Channel
void AttachSignalChannel (const PString &token, H323Transport *channel, BOOL answeringCall)
BOOL WriteSignalPDU (H323SignalPDU &pdu)
virtual void HandleSignallingChannel ()
virtual BOOL HandleSignalPDU (H323SignalPDU &pdu)
virtual void HandleTunnelPDU (H323SignalPDU *txPDU)
virtual BOOL OnReceivedSignalSetup (const H323SignalPDU &pdu)
virtual BOOL OnReceivedSignalSetupAck (const H323SignalPDU &pdu)
virtual BOOL OnReceivedSignalInformation (const H323SignalPDU &pdu)
virtual BOOL OnReceivedCallProceeding (const H323SignalPDU &pdu)
virtual BOOL OnReceivedProgress (const H323SignalPDU &pdu)
virtual BOOL OnReceivedAlerting (const H323SignalPDU &pdu)
virtual BOOL OnReceivedSignalConnect (const H323SignalPDU &pdu)
virtual BOOL OnReceivedFacility (const H323SignalPDU &pdu)
virtual BOOL OnReceivedSignalNotify (const H323SignalPDU &pdu)
virtual BOOL OnReceivedSignalStatus (const H323SignalPDU &pdu)
virtual BOOL OnReceivedStatusEnquiry (const H323SignalPDU &pdu)
virtual void OnReceivedReleaseComplete (const H323SignalPDU &pdu)
virtual BOOL OnUnknownSignalPDU (const H323SignalPDU &pdu)
virtual BOOL OnIncomingCall (const H323SignalPDU &setupPDU, H323SignalPDU &alertingPDU)
virtual BOOL ForwardCall (const PString &forwardParty)
virtual AnswerCallResponse OnAnswerCall (const PString &callerName, const H323SignalPDU &setupPDU, H323SignalPDU &connectPDU, H323SignalPDU &progressPDU)
virtual AnswerCallResponse OnAnswerCall (const PString &callerName)
void AnsweringCall (AnswerCallResponse response)
virtual CallEndReason SendSignalSetup (const PString &alias, const H323TransportAddress &address)
virtual BOOL OnSendSignalSetup (H323SignalPDU &setupPDU)
virtual BOOL OnSendCallProceeding (H323SignalPDU &callProceedingPDU)
virtual BOOL OnSendReleaseComplete (H323SignalPDU &releaseCompletePDU)
virtual BOOL OnAlerting (const H323SignalPDU &alertingPDU, const PString &user)
virtual BOOL OnInsufficientDigits ()
virtual void SendMoreDigits (const PString &digits)
virtual BOOL OnOutgoingCall (const H323SignalPDU &connectPDU)
virtual BOOL SendFastStartAcknowledge (H225_ArrayOf_PASN_OctetString &array)
virtual BOOL HandleFastStartAcknowledge (const H225_ArrayOf_PASN_OctetString &array)
Logical Channel Management
virtual void OnSelectLogicalChannels ()
virtual void SelectDefaultLogicalChannel (unsigned sessionID)
virtual void SelectFastStartChannels (unsigned sessionID, BOOL transmitter, BOOL receiver)
virtual void StartFastStartChannel (unsigned sessionID, H323Channel::Directions direction)
virtual BOOL OpenLogicalChannel (const H323Capability &capability, unsigned sessionID, H323Channel::Directions dir)
virtual BOOL OnOpenLogicalChannel (const H245_OpenLogicalChannel &openPDU, H245_OpenLogicalChannelAck &ackPDU, unsigned &errorCode)
virtual BOOL OnConflictingLogicalChannel (H323Channel &channel)
virtual H323ChannelCreateLogicalChannel (const H245_OpenLogicalChannel &open, BOOL startingFast, unsigned &errorCode)
virtual H323ChannelCreateRealTimeLogicalChannel (const H323Capability &capability, H323Channel::Directions dir, unsigned sessionID, const H245_H2250LogicalChannelParameters *param, RTP_QOS *rtpqos=NULL)
virtual BOOL OnCreateLogicalChannel (const H323Capability &capability, H323Channel::Directions dir, unsigned &errorCode)
virtual BOOL OnStartLogicalChannel (H323Channel &channel)
virtual void CloseLogicalChannel (unsigned number, BOOL fromRemote)
virtual void CloseLogicalChannelNumber (const H323ChannelNumber &number)
virtual void CloseAllLogicalChannels (BOOL fromRemote)
virtual void OnClosedLogicalChannel (const H323Channel &channel)
virtual BOOL OnClosingLogicalChannel (H323Channel &channel)
virtual void OnLogicalChannelFlowControl (H323Channel *channel, long bitRateRestriction)
virtual void OnLogicalChannelJitter (H323Channel *channel, DWORD jitter, int skippedFrameCount, int additionalBuffer)
H323ChannelGetLogicalChannel (unsigned number, BOOL fromRemote) const
H323ChannelFindChannel (unsigned sessionId, BOOL fromRemote) const
Bandwidth Management
virtual BOOL SetBandwidthAvailable (unsigned newBandwidth, BOOL force=FALSE)
virtual unsigned GetBandwidthUsed () const
Indications
virtual SendUserInputModes GetRealSendUserInputMode () const
virtual BOOL SendUserInputString (const PString &value)
virtual BOOL SendUserInputTone (char tone, unsigned duration=0)
virtual BOOL SendUserInputIndicationQ931 (const PString &value)
virtual BOOL SendUserInputIndicationString (const PString &value)
virtual BOOL SendUserInputIndicationTone (char tone, unsigned duration=0, unsigned logicalChannel=0, unsigned rtpTimestamp=0)
virtual BOOL SendUserInputIndication (const H245_UserInputIndication &pdu)
virtual void OnUserInputIndication (const H245_UserInputIndication &pdu)
RTP Session Management
virtual H323_RTP_SessionGetSessionCallbacks (unsigned sessionID) const
virtual RTP_SessionUseSession (const OpalTransport &transport, unsigned sessionID, RTP_QOS *rtpqos=NULL)
virtual void ReleaseSession (unsigned sessionID)
virtual void OnRTPStatistics (const RTP_Session &session) const
virtual PString GetSessionCodecNames (unsigned sessionID) const
Request Mode Changes
virtual BOOL RequestModeChange (const PString &newModes)
virtual BOOL RequestModeChange (const H245_ArrayOf_ModeDescription &newModes)
virtual BOOL OnRequestModeChange (const H245_RequestMode &pdu, H245_RequestModeAck &ack, H245_RequestModeReject &reject, PINDEX &selectedMode)
virtual void OnModeChanged (const H245_ModeDescription &newMode)
virtual void OnAcceptModeChange (const H245_RequestModeAck &pdu)
virtual void OnRefusedModeChange (const H245_RequestModeReject *pdu)
Other services
virtual BOOL RequestModeChangeT38 (const char *capabilityNames="T.38\nT38FaxUDP")
virtual BOOL GetAdmissionRequestAuthentication (const H225_AdmissionRequest &arq, H235Authenticators &authenticators)
Member variable access
H323EndPointGetEndPoint () const
BOOL HadAnsweredCall () const
BOOL IsGatekeeperRouted () const
unsigned GetDistinctiveRing () const
void SetDistinctiveRing (unsigned pattern)
const PString & GetCallToken () const
unsigned GetCallReference () const
const OpalGloballyUniqueID & GetCallIdentifier () const
const OpalGloballyUniqueID & GetConferenceIdentifier () const
void SetLocalPartyName (const PString &name)
const PStringList & GetLocalAliasNames () const
virtual void SetRemotePartyInfo (const H323SignalPDU &pdu)
void SetRemoteApplication (const H225_EndpointType &pdu)
const PString GetRemotePartyCallbackURL () const
const H323CapabilitiesGetLocalCapabilities () const
const H323CapabilitiesGetRemoteCapabilities () const
unsigned GetRemoteMaxAudioDelayJitter () const
const H323TransportGetSignallingChannel () const
unsigned GetSignallingVersion () const
const H323TransportGetControlChannel () const
OpalTransportGetTransport () const
unsigned GetControlVersion () const
unsigned GetUUIEsRequested () const
void SetUUIEsRequested (unsigned mask)
const PString GetGkAccessTokenOID () const
void SetGkAccessTokenOID (const PString &oid)
const PBYTEArray & GetGkAccessTokenData () const
void SetDestExtraCallInfo (const PString &info)
void SetRemotCallWaiting (const unsigned value)
const int GetRemoteCallWaiting () const
void SetEnforcedDurationLimit (unsigned seconds)

Protected Types

enum  ConnectionStates {
  NoConnectionActive, AwaitingGatekeeperAdmission, AwaitingTransportConnect, AwaitingSignalConnect,
  AwaitingLocalAnswer, HasExecutedSignalConnect, EstablishedConnection, ShuttingDownConnection,
  NumConnectionStates
}
enum  FastStartStates {
  FastStartDisabled, FastStartInitiate, FastStartResponse, FastStartAcknowledged,
  NumFastStartStates
}

Protected Member Functions

virtual void InternalEstablishedConnectionCheck ()
BOOL InternalEndSessionCheck (PPER_Stream &strm)
void SetRemoteVersions (const H225_ProtocolIdentifier &id)
void MonitorCallStatus ()
 PDECLARE_NOTIFIER (PThread, H323Connection, StartOutgoing)
 PDECLARE_NOTIFIER (PThread, H323Connection, NewOutgoingControlChannel)
 PDECLARE_NOTIFIER (PThread, H323Connection, NewIncomingControlChannel)
virtual OpalMediaStreamInternalCreateMediaStream (const OpalMediaFormat &mediaFormat, unsigned sessionID, BOOL isSource)

Protected Attributes

H323EndPointendpoint
int remoteCallWaiting
BOOL gatekeeperRouted
unsigned distinctiveRing
unsigned callReference
OpalGloballyUniqueID conferenceIdentifier
PString localDestinationAddress
PStringList localAliasNames
H323Capabilities localCapabilities
PString destExtraCallInfo
H323Capabilities remoteCapabilities
unsigned remoteMaxAudioDelayJitter
PTimer roundTripDelayTimer
WORD maxAudioDelayJitter
unsigned uuiesRequested
PString gkAccessTokenOID
PBYTEArray gkAccessTokenData
BOOL addAccessTokenToSetup
BOOL alertDone
H323TransportsignallingChannel
H323TransportcontrolChannel
OpalListenercontrolListener
BOOL h245Tunneling
H323SignalPDUh245TunnelRxPDU
H323SignalPDUh245TunnelTxPDU
H323SignalPDUsetupPDU
H323SignalPDUalertingPDU
H323SignalPDUconnectPDU
H323SignalPDUprogressPDU
enum H323Connection::ConnectionStates connectionState
unsigned h225version
unsigned h245version
BOOL h245versionSet
BOOL doH245inSETUP
BOOL lastPDUWasH245inSETUP
BOOL mustSendDRQ
BOOL mediaWaitForConnect
BOOL transmitterSidePaused
BOOL earlyStart
PString t38ModeChangeCapabilities
PSyncPoint digitsWaitFlag
BOOL endSessionNeeded
PSyncPoint endSessionReceived
PTimer enforcedDurationLimit
PChannel * holdMediaChannel
BOOL isConsultationTransfer
BOOL isCallIntrusion
unsigned callIntrusionProtectionLevel
FastStartStates fastStartState
H323LogicalChannelList fastStartChannels
OpalMediaStreamtransmitterMediaStream
H245NegMasterSlaveDeterminationmasterSlaveDeterminationProcedure
H245NegTerminalCapabilitySetcapabilityExchangeProcedure
H245NegLogicalChannelslogicalChannels
H245NegRequestModerequestModeProcedure
H245NegRoundTripDelayroundTripDelayProcedure

Detailed Description

This class represents a particular H323 connection between two endpoints. There are at least two threads in use, this one to look after the signalling channel, an another to look after the control channel. There would then be additional threads created for each data channel created by the control channel protocol thread.


Member Enumeration Documentation

enum H323Connection::ControlProtocolErrors

Error discriminator for the OnControlProtocolError() function.

Enumerator:
e_MasterSlaveDetermination 
e_CapabilityExchange 
e_LogicalChannel 
e_ModeRequest 
e_RoundTripDelay 

enum H323Connection::ConnectionStates [protected]

Enumerator:
NoConnectionActive 
AwaitingGatekeeperAdmission 
AwaitingTransportConnect 
AwaitingSignalConnect 
AwaitingLocalAnswer 
HasExecutedSignalConnect 
EstablishedConnection 
ShuttingDownConnection 
NumConnectionStates 

enum H323Connection::FastStartStates [protected]

Enumerator:
FastStartDisabled 
FastStartInitiate 
FastStartResponse 
FastStartAcknowledged 
NumFastStartStates 


Constructor & Destructor Documentation

H323Connection::H323Connection ( OpalCall call,
H323EndPoint endpoint,
const PString &  token,
const PString &  alias,
const H323TransportAddress address,
unsigned  options = 0,
OpalConnection::StringOptions stringOptions = NULL 
)

Create a new connection.

Parameters:
call  Call object connection belongs to
endpoint  H323 End Point object
token  Token for new connection
alias  Alias for outgoing call
address  Address for outgoing call
options  Connection option bits
stringOptions  complex string options

H323Connection::~H323Connection (  ) 

Destroy the connection

H323Connection::H323Connection ( OpalCall call,
H323EndPoint endpoint,
const PString &  token,
const PString &  alias,
const H323TransportAddress address,
unsigned  options = 0,
OpalConnection::StringOptions stringOptions = NULL 
)

Create a new connection.

Parameters:
call  Call object connection belongs to
endpoint  H323 End Point object
token  Token for new connection
alias  Alias for outgoing call
address  Address for outgoing call
options  Connection option bits
stringOptions  complex string options

H323Connection::~H323Connection (  ) 

Destroy the connection


Member Function Documentation

virtual BOOL H323Connection::SetUpConnection (  )  [virtual]

Start an outgoing connection. This function will initiate the connection to the remote entity, for example in H.323 it sends a SETUP, in SIP it sends an INVITE etc.

The default behaviour is to send SETUP packet.

Implements OpalConnection.

virtual BOOL H323Connection::SetAlerting ( const PString &  calleeName,
BOOL  withMedia 
) [virtual]

Indicate to remote endpoint an alert is in progress. If this is an incoming connection and it is in the Alerting phase, then this function is used to indicate to that endpoint that an alert is in progress. This is usually due to another connection which is in the call (the B party) has received an OnAlerting() indicating that its remote endpoint is "ringing".

The default behaviour sends an ALERTING pdu.

Parameters:
calleeName  Name of endpoint being alerted.
withMedia  Open media with alerting

Implements OpalConnection.

virtual BOOL H323Connection::SetConnected (  )  [virtual]

Indicate to remote endpoint we are connected.

The default behaviour sends a CONNECT pdu.

Implements OpalConnection.

virtual void H323Connection::OnSendARQ ( H225_AdmissionRequest arq  )  [virtual]

called when an ARQ needs to be sent to a gatekeeper. This allows the connection to change or check fields in the ARQ before it is sent.

By default, this calls the matching function on the endpoint

virtual BOOL H323Connection::SetProgressed (  )  [virtual]

Indicate to remote endpoint we are sending a progress.

The default behaviour sends a PROGRESS pdu.

virtual void H323Connection::OnEstablished (  )  [virtual]

Called when a connection is established. Default behaviour is to call H323EndPoint::OnConnectionEstablished

Reimplemented from OpalConnection.

virtual void H323Connection::OnReleased (  )  [virtual]

Clean up the termination of the connection. This function can do any internal cleaning up and waiting on background threads that may be using the connection object.

Note that there is not a one to one relationship with the OnEstablishedConnection() function. This function may be called without that function being called. For example if SetUpConnection() was used but the call never completed.

Classes that override this function should make sure they call the ancestor version for correct operation.

An application will not typically call this function as it is used by the OpalManager during a release of the connection.

The default behaviour calls CleanUpOnCallEnd() then calls the ancestor.

Reimplemented from OpalConnection.

virtual PString H323Connection::GetDestinationAddress (  )  [virtual]

Get the destination address of an incoming connection. This will, for example, collect a phone number from a POTS line, or get the fields from the H.225 SETUP pdu in a H.323 connection.

Reimplemented from OpalConnection.

virtual OpalMediaFormatList H323Connection::GetMediaFormats (  )  const [virtual]

Get the data formats this connection is capable of operating. This provides a list of media data format names that an OpalMediaStream may be created in within this connection.

The default behaviour returns media data format names contained in the remote capability table.

Implements OpalConnection.

virtual BOOL H323Connection::OpenSourceMediaStream ( const OpalMediaFormatList mediaFormats,
unsigned  sessionID 
) [virtual]

Open source transmitter media stream for session.

Parameters:
mediaFormats  Optional media format to open
sessionID  Session to start stream on

Reimplemented from OpalConnection.

virtual OpalMediaStream* H323Connection::CreateMediaStream ( const OpalMediaFormat mediaFormat,
unsigned  sessionID,
BOOL  isSource 
) [virtual]

Open a new media stream. This will create a media stream of an appropriate subclass as required by the underlying connection protocol. For instance H.323 would create an OpalRTPStream.

The sessionID parameter may not be needed by a particular media stream and may be ignored. In the case of an OpalRTPStream it us used.

Note that media streams may be created internally to the underlying protocol. This function is not the only way a stream can come into existance.

The default behaviour is pure.

Parameters:
mediaFormat  Media format for stream
sessionID  Session number for stream
isSource  Is a source stream

Reimplemented from OpalConnection.

void H323Connection::OnPatchMediaStream ( BOOL  isSource,
OpalMediaPatch patch 
) [virtual]

Overrides from OpalConnection

Reimplemented from OpalConnection.

virtual BOOL H323Connection::IsMediaBypassPossible ( unsigned  sessionID  )  const [virtual]

See if the media can bypass the local host.

The default behaviour returns TRUE if the session is audio or video.

Parameters:
sessionID  Session ID for media channel

Reimplemented from OpalConnection.

virtual BOOL H323Connection::GetMediaInformation ( unsigned  sessionID,
MediaInformation &  info 
) const [virtual]

Get information on the media channel for the connection. The default behaviour returns TRUE and fills the info structure if there is a media channel active for the sessionID.

Parameters:
sessionID  Session ID for media channel
info  Information on media channel

virtual void H323Connection::OnCleared (  )  [virtual]

Called when a connection is cleared, just after CleanUpOnCallEnd() Default behaviour is to call H323Connection::OnConnectionCleared

BOOL H323Connection::IsEstablished (  )  const [inline]

Determine if the call has been established. This can be used in combination with the GetCallEndReason() function to determine the three main phases of a call, call setup, call established and call cleared.

virtual void H323Connection::CleanUpOnCallEnd (  )  [virtual]

Clean up the call clearance of the connection. This function will do any internal cleaning up and waiting on background threads that may be using the connection object. After this returns it is then safe to delete the object.

An application will not typically use this function as it is used by the H323EndPoint during a clear call.

void H323Connection::AttachSignalChannel ( const PString &  token,
H323Transport channel,
BOOL  answeringCall 
)

Attach a transport to this connection as the signalling channel.

Parameters:
token  New token to use to identify connection
channel  Transport for the PDU's
answeringCall  Flag for if incoming/outgoing call.

BOOL H323Connection::WriteSignalPDU ( H323SignalPDU pdu  ) 

Write a PDU to the signalling channel.

Parameters:
pdu  PDU to write.

virtual void H323Connection::HandleSignallingChannel (  )  [virtual]

Handle reading PDU's from the signalling channel. This is an internal function and is unlikely to be used by applications.

virtual BOOL H323Connection::HandleSignalPDU ( H323SignalPDU pdu  )  [virtual]

Handle PDU from the signalling channel. This is an internal function and is unlikely to be used by applications.

Parameters:
pdu  PDU to handle.

virtual void H323Connection::HandleTunnelPDU ( H323SignalPDU txPDU  )  [virtual]

Handle Control PDU tunnelled in the signalling channel. This is an internal function and is unlikely to be used by applications.

Parameters:
txPDU  PDU tunnel response into.

virtual BOOL H323Connection::OnReceivedSignalSetup ( const H323SignalPDU pdu  )  [virtual]

Handle an incoming Q931 setup PDU. The default behaviour is to do the handshaking operation calling a few virtuals at certain moments in the sequence.

If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

Parameters:
pdu  Received setup PDU

virtual BOOL H323Connection::OnReceivedSignalSetupAck ( const H323SignalPDU pdu  )  [virtual]

Handle an incoming Q931 setup acknowledge PDU. If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour does nothing.

Parameters:
pdu  Received setup PDU

virtual BOOL H323Connection::OnReceivedSignalInformation ( const H323SignalPDU pdu  )  [virtual]

Handle an incoming Q931 information PDU. If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour does nothing.

Parameters:
pdu  Received setup PDU

virtual BOOL H323Connection::OnReceivedCallProceeding ( const H323SignalPDU pdu  )  [virtual]

Handle an incoming Q931 call proceeding PDU. If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour checks for hH245Address field and if present starts the separate H245 channel, if successful or not present it returns TRUE.

Parameters:
pdu  Received call proceeding PDU

virtual BOOL H323Connection::OnReceivedProgress ( const H323SignalPDU pdu  )  [virtual]

Handle an incoming Q931 progress PDU. If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour checks for hH245Address field and if present starts the separate H245 channel, if successful or not present it returns TRUE.

Parameters:
pdu  Received call proceeding PDU

virtual BOOL H323Connection::OnReceivedAlerting ( const H323SignalPDU pdu  )  [virtual]

Handle an incoming Q931 alerting PDU. If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour obtains the display name and calls OnAlerting().

Parameters:
pdu  Received connect PDU

virtual BOOL H323Connection::OnReceivedSignalConnect ( const H323SignalPDU pdu  )  [virtual]

Handle an incoming Q931 connect PDU. If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour checks for hH245Address field and if present starts the separate H245 channel, if successful it returns TRUE. If not present and there is no H245Tunneling then it returns FALSE.

Parameters:
pdu  Received connect PDU

virtual BOOL H323Connection::OnReceivedFacility ( const H323SignalPDU pdu  )  [virtual]

Handle an incoming Q931 facility PDU. If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour checks for hH245Address field and if present starts the separate H245 channel, if successful or not present it returns TRUE.

Parameters:
pdu  Received connect PDU

virtual BOOL H323Connection::OnReceivedSignalNotify ( const H323SignalPDU pdu  )  [virtual]

Handle an incoming Q931 Notify PDU. If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour simply returns TRUE.

Parameters:
pdu  Received connect PDU

virtual BOOL H323Connection::OnReceivedSignalStatus ( const H323SignalPDU pdu  )  [virtual]

Handle an incoming Q931 Status PDU. If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour simply returns TRUE.

Parameters:
pdu  Received connect PDU

virtual BOOL H323Connection::OnReceivedStatusEnquiry ( const H323SignalPDU pdu  )  [virtual]

Handle an incoming Q931 Status Enquiry PDU. If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour sends a Q931 Status PDU back.

Parameters:
pdu  Received connect PDU

virtual void H323Connection::OnReceivedReleaseComplete ( const H323SignalPDU pdu  )  [virtual]

Handle an incoming Q931 Release Complete PDU. The default behaviour calls Clear() using reason code based on the Release Complete Cause field and the current connection state.

Parameters:
pdu  Received connect PDU

virtual BOOL H323Connection::OnUnknownSignalPDU ( const H323SignalPDU pdu  )  [virtual]

This function is called from the HandleSignallingChannel() function for unhandled PDU types.

If FALSE is returned the connection is aborted and a Release Complete PDU is sent. The default behaviour returns TRUE.

Parameters:
pdu  Received PDU

virtual BOOL H323Connection::OnIncomingCall ( const H323SignalPDU setupPDU,
H323SignalPDU alertingPDU 
) [virtual]

Call back for incoming call. This function is called from the OnReceivedSignalSetup() function before it sends the Alerting PDU. It gives an opportunity for an application to alter the reply before transmission to the other endpoint.

If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour calls the endpoint function of the same name.

Parameters:
setupPDU  Received setup PDU
alertingPDU  Alerting PDU to send

virtual BOOL H323Connection::ForwardCall ( const PString &  forwardParty  )  [virtual]

Forward incoming call to specified address. This would typically be called from within the OnIncomingCall() function when an application wishes to redirct an unwanted incoming call.

The return value is TRUE if the call is to be forwarded, FALSE otherwise. Note that if the call is forwarded the current connection is cleared with the ended call code of EndedByCallForwarded.

Parameters:
forwardParty  Party to forward call to.

Reimplemented from OpalConnection.

virtual AnswerCallResponse H323Connection::OnAnswerCall ( const PString &  callerName,
const H323SignalPDU setupPDU,
H323SignalPDU connectPDU,
H323SignalPDU progressPDU 
) [virtual]

Call back for answering an incoming call. This function is used for an application to control the answering of incoming calls. It is usually used to indicate the immediate action to be taken in answering the call.

It is called from the OnReceivedSignalSetup() function before it sends the Alerting or Connect PDUs. It also gives an opportunity for an application to alter the Connect PDU reply before transmission to the remote endpoint.

If AnswerCallNow is returned then the H.323 protocol proceeds with the connection. If AnswerCallDenied is returned the connection is aborted and a Release Complete PDU is sent. If AnswerCallPending is returned then the Alerting PDU is sent and the protocol negotiations are paused until the AnsweringCall() function is called. Finally, if AnswerCallDeferred is returned then no Alerting PDU is sent, but the system still waits as in the AnswerCallPending response.

Note this function should not block for any length of time. If the decision to answer the call may take some time eg waiting for a user to pick up the phone, then AnswerCallPending or AnswerCallDeferred should be returned.

The default behaviour calls the endpoint function of the same name which in turn will return AnswerCallNow.

Parameters:
callerName  Name of caller
setupPDU  Received setup PDU
connectPDU  Connect PDU to send.
progressPDU  Progress PDU to send.

virtual AnswerCallResponse H323Connection::OnAnswerCall ( const PString &  callerName  )  [virtual]

Call back for answering an incoming call. This function is called after the connection has been acknowledged but before the connection is established

This gives the application time to wait for some event before signalling to the endpoint that the connection is to proceed. For example the user pressing an "Answer call" button.

If AnswerCallDenied is returned the connection is aborted and the connetion specific end call PDU is sent. If AnswerCallNow is returned then the connection proceeding, Finally if AnswerCallPending is returned then the protocol negotiations are paused until the AnsweringCall() function is called.

The default behaviour calls the endpoint function of the same name.

Parameters:
callerName  Name of caller

Reimplemented from OpalConnection.

void H323Connection::AnsweringCall ( AnswerCallResponse  response  )  [virtual]

Indicate the result of answering an incoming call. This should only be called if the OnAnswerCall() callback function has returned a AnswerCallPending or AnswerCallDeferred response.

Note sending further AnswerCallPending responses via this function will have the result of an Alerting PDU being sent to the remote endpoint. In this way multiple Alerting PDUs may be sent.

Sending a AnswerCallDeferred response would have no effect.

Parameters:
response  Answer response to incoming call

Reimplemented from OpalConnection.

virtual CallEndReason H323Connection::SendSignalSetup ( const PString &  alias,
const H323TransportAddress address 
) [virtual]

Send first PDU in signalling channel. This function does the signalling handshaking for establishing a connection to a remote endpoint. The transport (TCP/IP) for the signalling channel is assumed to be already created. This function will then do the SetRemoteAddress() and Connect() calls o establish the transport.

Returns the error code for the call failure reason or NumCallEndReasons if the call was successful to that point in the protocol.

Parameters:
alias  Name of remote party
address  Address of destination

virtual BOOL H323Connection::OnSendSignalSetup ( H323SignalPDU setupPDU  )  [virtual]

Adjust setup PDU being sent on initialisation of signal channel. This function is called from the SendSignalSetup() function before it sends the Setup PDU. It gives an opportunity for an application to alter the request before transmission to the other endpoint.

The default behaviour simply returns TRUE. Note that this is usually overridden by the transport dependent descendent class, eg the H323ConnectionTCP descendent fills in the destCallSignalAddress field with the TCP/IP data. Therefore if you override this in your application make sure you call the ancestor function.

Parameters:
setupPDU  Setup PDU to send

virtual BOOL H323Connection::OnSendCallProceeding ( H323SignalPDU callProceedingPDU  )  [virtual]

Adjust call proceeding PDU being sent. This function is called from the OnReceivedSignalSetup() function before it sends the Call Proceeding PDU. It gives an opportunity for an application to alter the request before transmission to the other endpoint. If this function returns FALSE then the Call Proceeding PDU is not sent at all.

The default behaviour simply returns TRUE.

Parameters:
callProceedingPDU  Call Proceeding PDU to send

virtual BOOL H323Connection::OnSendReleaseComplete ( H323SignalPDU releaseCompletePDU  )  [virtual]

Call back for Release Complete being sent. This allows an application to add things to the release complete before it is sent to the remote endpoint.

Returning FALSE will prevent the release complete from being sent. Note that this would be very unusual as this is called when the connection is being cleaned up. There will be no second chance to send the PDU and it must be sent.

The default behaviour simply returns TRUE.

Parameters:
releaseCompletePDU  Release Complete PDU to send

virtual BOOL H323Connection::OnAlerting ( const H323SignalPDU alertingPDU,
const PString &  user 
) [virtual]

Call back for remote party being alerted. This function is called from the SendSignalSetup() function after it receives the optional Alerting PDU from the remote endpoint. That is when the remote "phone" is "ringing".

If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour calls the endpoint function of the same name.

Parameters:
alertingPDU  Received Alerting PDU
user  Username of remote endpoint

virtual BOOL H323Connection::OnInsufficientDigits (  )  [virtual]

This function is called when insufficient digits have been entered. This supports overlapped dialling so that a call can begin when it is not known how many more digits are to be entered in a phone number.

It is expected that the application will override this function. It should be noted that the application should not block in the function but only indicate to whatever other thread is gathering digits that more are required and that thread should call SendMoreDigits().

If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour simply returns FALSE.

virtual void H323Connection::SendMoreDigits ( const PString &  digits  )  [virtual]

This function is called when sufficient digits have been entered. This supports overlapped dialling so that a call can begin when it is not known how many more digits are to be entered in a phone number.

The digits parameter is appended to the existing remoteNumber member variable and the call is retried.

If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour simply returns TRUE.

Parameters:
digits  Extra digits

virtual BOOL H323Connection::OnOutgoingCall ( const H323SignalPDU connectPDU  )  [virtual]

This function is called from the SendSignalSetup() function after it receives the Connect PDU from the remote endpoint, but before it attempts to open the control channel.

If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour calls H323EndPoint::OnOutgoingCall

Parameters:
connectPDU  Received Connect PDU

virtual BOOL H323Connection::SendFastStartAcknowledge ( H225_ArrayOf_PASN_OctetString array  )  [virtual]

Send an the acknowldege of a fast start. This function is called when the fast start channels provided to this connection by the original SETUP PDU have been selected and opened and need to be sent back to the remote endpoint.

If FALSE is returned then no fast start has been acknowledged, possibly due to no common codec in fast start request.

The default behaviour uses OnSelectLogicalChannels() to find a pair of channels and adds then to the provided PDU.

Parameters:
array  Array of H245_OpenLogicalChannel

virtual BOOL H323Connection::HandleFastStartAcknowledge ( const H225_ArrayOf_PASN_OctetString array  )  [virtual]

Handle the acknowldege of a fast start. This function is called from one of a number of functions after it receives a PDU from the remote endpoint that has a fastStart field. It is in response to a request for a fast strart from the local endpoint.

If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour parses the provided array and starts the channels acknowledged in it.

Parameters:
array  Array of H245_OpenLogicalChannel

virtual BOOL H323Connection::CreateOutgoingControlChannel ( const H225_TransportAddress h245Address  )  [virtual]

Start a separate H245 channel. This function is called from one of a number of functions after it receives a PDU from the remote endpoint that has a h245Address field.

If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour checks to see if it is a known transport and creates a corresponding H323Transport decendent for the control channel.

Parameters:
h245Address  H245 address

virtual BOOL H323Connection::CreateIncomingControlChannel ( H225_TransportAddress h245Address  )  [virtual]

Start a separate control channel. This function is called from one of a number of functions when it needs to listen for an incoming H.245 connection.

If FALSE is returned the connection is aborted and a Release Complete PDU is sent.

The default behaviour checks to see if it is a known transport and creates a corresponding OpalTransport decendent for the control channel.

Parameters:
h245Address  PDU transport address to set

virtual BOOL H323Connection::WriteControlPDU ( const H323ControlPDU pdu  )  [virtual]

Write a PDU to the control channel. If there is no control channel open then this will tunnel the PDU into the signalling channel.

virtual BOOL H323Connection::StartControlNegotiations (  )  [virtual]

Start control channel negotiations.

virtual void H323Connection::HandleControlChannel (  )  [virtual]

Handle reading data on the control channel.

virtual BOOL H323Connection::HandleControlData ( PPER_Stream &  strm  )  [virtual]

Handle incoming data on the control channel. This decodes the data stream into a PDU and calls HandleControlPDU().

If FALSE is returned the connection is aborted. The default behaviour returns TRUE.

virtual BOOL H323Connection::HandleControlPDU ( const H323ControlPDU pdu  )  [virtual]

Handle incoming PDU's on the control channel. Dispatches them to the various virtuals off this class.

If FALSE is returned the connection is aborted. The default behaviour returns TRUE.

virtual BOOL H323Connection::OnUnknownControlPDU ( const H323ControlPDU pdu  )  [virtual]

This function is called from the HandleControlPDU() function for unhandled PDU types.

If FALSE is returned the connection is aborted and a Release Complete PDU is sent. The default behaviour returns TRUE.

The default behaviour send a FunctioNotUnderstood indication back to the sender, and returns TRUE to continue operation.

Parameters:
pdu  Received PDU

virtual BOOL H323Connection::OnH245Request ( const H323ControlPDU pdu  )  [virtual]

Handle incoming request PDU's on the control channel. Dispatches them to the various virtuals off this class.

Parameters:
pdu  Received PDU

virtual BOOL H323Connection::OnH245Response ( const H323ControlPDU pdu  )  [virtual]

Handle incoming response PDU's on the control channel. Dispatches them to the various virtuals off this class.

Parameters:
pdu  Received PDU

virtual BOOL H323Connection::OnH245Command ( const H323ControlPDU pdu  )  [virtual]

Handle incoming command PDU's on the control channel. Dispatches them to the various virtuals off this class.

Parameters:
pdu  Received PDU

virtual BOOL H323Connection::OnH245Indication ( const H323ControlPDU pdu  )  [virtual]

Handle incoming indication PDU's on the control channel. Dispatches them to the various virtuals off this class.

Parameters:
pdu  Received PDU

virtual BOOL H323Connection::OnH245_SendTerminalCapabilitySet ( const H245_SendTerminalCapabilitySet pdu  )  [virtual]

Handle H245 command to send terminal capability set.

Parameters:
pdu  Received PDU

virtual BOOL H323Connection::OnH245_FlowControlCommand ( const H245_FlowControlCommand pdu  )  [virtual]

Handle H245 command to control flow control. This function calls OnLogicalChannelFlowControl() with the channel and bit rate restriction.

Parameters:
pdu  Received PDU

virtual BOOL H323Connection::OnH245_MiscellaneousCommand ( const H245_MiscellaneousCommand pdu  )  [virtual]

Handle H245 miscellaneous command. This function passes the miscellaneous command on to the channel defined by the pdu.

Parameters:
pdu  Received PDU

virtual BOOL H323Connection::OnH245_MiscellaneousIndication ( const H245_MiscellaneousIndication pdu  )  [virtual]

Handle H245 miscellaneous indication. This function passes the miscellaneous indication on to the channel defined by the pdu.

Parameters:
pdu  Received PDU

virtual BOOL H323Connection::OnH245_JitterIndication ( const H245_JitterIndication pdu  )  [virtual]

Handle H245 indication of received jitter. This function calls OnLogicalChannelJitter() with the channel and estimated jitter.

Parameters:
pdu  Received PDU

virtual BOOL H323Connection::OnControlProtocolError ( ControlProtocolErrors  errorSource,
const void *  errorData = NULL 
) [virtual]

This function is called from the HandleControlPDU() function or any of its sub-functions for protocol errors, eg unhandled PDU types.

The errorData field may be a string or PDU or some other data depending on the value of the errorSource parameter. These are: e_UnhandledPDU &H323ControlPDU e_MasterSlaveDetermination const char *

If FALSE is returned the connection is aborted. The default behaviour returns TRUE.

Parameters:
errorSource  Source of the proptoerror
errorData  Data associated with error

virtual void H323Connection::OnSendCapabilitySet ( H245_TerminalCapabilitySet pdu  )  [virtual]

This function is called from the HandleControlPDU() function when it is about to send the Capabilities Set to the remote endpoint. This gives the application an oppurtunity to alter the PDU to be sent.

The default behaviour will make "adjustments" for compatibility with some broken remote endpoints.

Parameters:
pdu  PDU to send

virtual BOOL H323Connection::OnReceivedCapabilitySet ( const H323Capabilities remoteCaps,
const H245_MultiplexCapability muxCap,
H245_TerminalCapabilitySetReject reject 
) [virtual]

This function is called when the remote endpoint sends its capability set. This gives the application an opportunity to determine what codecs are available and if it supports any of the combinations of codecs.

Note any codec types that are the remote system supports that are not in the codecs list member variable for the endpoint are ignored and not included in the remoteCodecs list.

The default behaviour assigns the table and set to member variables and returns TRUE if the remoteCodecs list is not empty.

Parameters:
remoteCaps  Capability combinations remote supports
muxCap  Transport capability, if present
reject  Rejection PDU (if return FALSE)

virtual void H323Connection::SendCapabilitySet ( BOOL  empty  )  [virtual]

Send a new capability set.

Parameters:
empty  Send an empty set.

virtual void H323Connection::OnSetLocalCapabilities (  )  [virtual]

Call back to set the local capabilities. This is called just before the capabilties are required when a call is begun. It is called when a SETUP PDU is received or when one is about to be sent, so that the capabilities may be adjusted for correct fast start operation.

The default behaviour adds all media formats.

BOOL H323Connection::IsH245Master (  )  const

Return if this H245 connection is a master or slave

void H323Connection::StartRoundTripDelay (  ) 

Start the round trip delay calculation over the control channel.

PTimeInterval H323Connection::GetRoundTripDelay (  )  const

Get the round trip delay over the control channel.

virtual void H323Connection::OnSelectLogicalChannels (  )  [virtual]

Call back to select logical channels to start.

This function must be defined by the descendent class. It is used to select the logical channels to be opened between the two endpoints. There are three ways in which this may be called: when a "fast start" has been initiated by the local endpoint (via SendSignalSetup() function), when a "fast start" has been requested from the remote endpoint (via the OnReceivedSignalSetup() function) or when the H245 capability set (and master/slave) negotiations have completed (via the OnControlChannelOpen() function.

The function would typically examine several member variable to decide which mode it is being called in and what to do. If fastStartState is FastStartDisabled then non-fast start semantics should be used. The H245 capabilities in the remoteCapabilities members should be examined, and appropriate transmit channels started using OpenLogicalChannel().

If fastStartState is FastStartInitiate, then the local endpoint has initiated a call and is asking the application if fast start semantics are to be used. If so it is expected that the function call OpenLogicalChannel() for all the channels that it wishes to be able to be use. A subset (possibly none!) of these would actually be started when the remote endpoint replies.

If fastStartState is FastStartResponse, then this indicates the remote endpoint is attempting a fast start. The fastStartChannels member contains a list of possible channels from the remote that the local endpoint is to select which to accept. For each accepted channel it simply necessary to call the Start() function on that channel eg fastStartChannels[0].Start();

The default behaviour selects the first codec of each session number that is available. This is according to the order of the capabilities in the remoteCapabilities, the local capability table or of the fastStartChannels list respectively for each of the above scenarios.

virtual void H323Connection::SelectDefaultLogicalChannel ( unsigned  sessionID  )  [virtual]

Select default logical channel for normal start.

Parameters:
sessionID  Session ID to find default logical channel.

virtual void H323Connection::SelectFastStartChannels ( unsigned  sessionID,
BOOL  transmitter,
BOOL  receiver 
) [virtual]

Select default logical channel for fast start. Internal function, not for normal use.

Parameters:
sessionID  Session ID to find default logical channel.
transmitter  Whether to open transmitters
receiver  Whether to open receivers

virtual void H323Connection::StartFastStartChannel ( unsigned  sessionID,
H323Channel::Directions  direction 
) [virtual]

Start a logical channel for fast start. Internal function, not for normal use.

Parameters:
sessionID  Session ID to find logical channel.
direction  Direction of channel to start

virtual BOOL H323Connection::OpenLogicalChannel ( const H323Capability capability,
unsigned  sessionID,
H323Channel::Directions  dir 
) [virtual]

Open a new logical channel. This function will open a channel between the endpoints for the specified capability.

If this function is called while there is not yet a conenction established, eg from the OnFastStartLogicalChannels() function, then a "trial" receiver/transmitter channel is created. This channel is not started until the remote enpoint has confirmed that they are to start. Any channels not confirmed are deleted.

If this function is called later in the call sequence, eg from OnSelectLogicalChannels(), then it may only establish a transmit channel, ie fromRemote must be FALSE.

Parameters:
capability  Capability to open channel with
sessionID  Session for the channel
dir  Direction of channel

virtual BOOL H323Connection::OnOpenLogicalChannel ( const H245_OpenLogicalChannel openPDU,
H245_OpenLogicalChannelAck ackPDU,
unsigned &  errorCode 
) [virtual]

This function is called when the remote endpoint want's to open a new channel.

If the return value is FALSE then the open is rejected using the errorCode as the cause, this would be a value from the enum H245_OpenLogicalChannelReject_cause::Choices.

The default behaviour simply returns TRUE.

Parameters:
openPDU  Received PDU for the channel open
ackPDU  PDU to send for acknowledgement
errorCode  Error to return if refused

virtual BOOL H323Connection::OnConflictingLogicalChannel ( H323Channel channel  )  [virtual]

Callback for when a logical channel conflict has occurred. This is called when the remote endpoint, which is a master, rejects our transmitter channel due to a resource conflict. Typically an inability to do asymmetric codecs. The local (slave) endpoint must then try and open a new transmitter channel using the same codec as the receiver that is being opened.

Parameters:
channel  Channel that conflicted

virtual H323Channel* H323Connection::CreateLogicalChannel ( const H245_OpenLogicalChannel open,
BOOL  startingFast,
unsigned &  errorCode 
) [virtual]

Create a new logical channel object. This is in response to a request from the remote endpoint to open a logical channel.

Parameters:
open  Parameters for opening channel
startingFast  Flag for fast/slow starting.
errorCode  Reason for create failure

virtual H323Channel* H323Connection::CreateRealTimeLogicalChannel ( const H323Capability capability,
H323Channel::Directions  dir,
unsigned  sessionID,
const H245_H2250LogicalChannelParameters param,
RTP_QOS rtpqos = NULL 
) [virtual]

Create a new real time logical channel object. This creates a logical channel for handling RTP data. It is primarily used to allow an application to redirect the RTP media streams to other hosts to the local one. In that case it would create an instance of the H323_ExternalRTPChannel class with the appropriate address. eg:

H323Channel * MyConnection::CreateRealTimeLogicalChannel( const H323Capability & capability, H323Channel::Directions dir, unsigned sessionID, const H245_H2250LogicalChannelParameters * param) { return new H323_ExternalRTPChannel(*this, capability, dir, sessionID, externalIpAddress, externalPort); }

An application would typically also override the OnStartLogicalChannel() function to obtain from the H323_ExternalRTPChannel instance the address of the remote endpoints media server RTP addresses to complete the setting up of the external RTP stack. eg:

BOOL OnStartLogicalChannel(H323Channel & channel) { H323_ExternalRTPChannel & external = (H323_ExternalRTPChannel &)channel; external.GetRemoteAddress(remoteIpAddress, remotePort); }

Note that the port in the above example is always the data port, the control port is assumed to be data+1.

The default behaviour assures there is an RTP session for the session ID, and if not creates one, then creates a H323_RTPChannel which will do RTP media to the local host.

Parameters:
capability  Capability creating channel
dir  Direction of channel
sessionID  Session ID for RTP channel
param  Parameters for channel
rtpqos  QoS for RTP

virtual BOOL H323Connection::OnCreateLogicalChannel ( const H323Capability capability,
H323Channel::Directions  dir,
unsigned &  errorCode 
) [virtual]

This function is called when the remote endpoint want's to create a new channel.

If the return value is FALSE then the open is rejected using the errorCode as the cause, this would be a value from the enum H245_OpenLogicalChannelReject_cause::Choices.

The default behaviour checks the capability set for if this capability is allowed to be opened with other channels that may already be open.

Parameters:
capability  Capability for the channel open
dir  Direction of channel
errorCode  Error to return if refused

virtual BOOL H323Connection::OnStartLogicalChannel ( H323Channel channel  )  [virtual]

Call back function when a logical channel thread begins.

The default behaviour does nothing and returns TRUE.

Parameters:
channel  Channel that has been started.

virtual void H323Connection::CloseLogicalChannel ( unsigned  number,
BOOL  fromRemote 
) [virtual]

Close a logical channel.

Parameters:
number  Channel number to close.
fromRemote  Indicates close request of remote channel

virtual void H323Connection::CloseLogicalChannelNumber ( const H323ChannelNumber number  )  [virtual]

Close a logical channel by number.

Parameters:
number  Channel number to close.

virtual void H323Connection::CloseAllLogicalChannels ( BOOL  fromRemote  )  [virtual]

Close a logical channel.

Parameters:
fromRemote  Indicates close request of remote channel

virtual void H323Connection::OnClosedLogicalChannel ( const H323Channel channel  )  [virtual]

This function is called when the remote endpoint has closed down a logical channel.

The default behaviour does nothing.

Parameters:
channel  Channel that was closed

virtual BOOL H323Connection::OnClosingLogicalChannel ( H323Channel channel  )  [virtual]

This function is called when the remote endpoint request the close of a logical channel.

The application may get an opportunity to refuse to close the channel by returning FALSE from this function.

The default behaviour returns TRUE.

Parameters:
channel  Channel that is to be closed

virtual void H323Connection::OnLogicalChannelFlowControl ( H323Channel channel,
long  bitRateRestriction 
) [virtual]

This function is called when the remote endpoint wishes to limit the bit rate being sent on a channel.

If channel is NULL, then the bit rate limit applies to all channels.

The default behaviour does nothing if channel is NULL, otherwise calls H323Channel::OnFlowControl() on the specific channel.

Parameters:
channel  Channel that is to be limited
bitRateRestriction  Limit for channel

virtual void H323Connection::OnLogicalChannelJitter ( H323Channel channel,
DWORD  jitter,
int  skippedFrameCount,
int  additionalBuffer 
) [virtual]

This function is called when the remote endpoint indicates the level of jitter estimated by the receiver.

If channel is NULL, then the jitter applies to all channels.

The default behaviour does nothing if channel is NULL, otherwise calls H323Channel::OnJitter() on the specific channel.

Parameters:
channel  Channel that is to be limited
jitter  Estimated received jitter in microseconds
skippedFrameCount  Frames skipped by decodec
additionalBuffer  Additional size of video decoder buffer

H323Channel* H323Connection::GetLogicalChannel ( unsigned  number,
BOOL  fromRemote 
) const

Get a logical channel. Locates the specified channel number and returns a pointer to it.

Parameters:
number  Channel number to get.
fromRemote  Indicates get a remote channel

H323Channel* H323Connection::FindChannel ( unsigned  sessionId,
BOOL  fromRemote 
) const

Find a logical channel. Locates a channel give a RTP session ID. Each session would usually have two logical channels associated with it, so the fromRemote flag bay be used to distinguish which channel to return.

Parameters:
sessionId  Session ID to search for.
fromRemote  Indicates the direction of RTP data.

virtual BOOL H323Connection::SetBandwidthAvailable ( unsigned  newBandwidth,
BOOL  force = FALSE 
) [virtual]

Set the available bandwidth in 100's of bits/sec. Note if the force parameter is TRUE this function will close down active logical channels to meet the new bandwidth requirement.

Parameters:
newBandwidth  New bandwidth limit
force  Force bandwidth limit

Reimplemented from OpalConnection.

virtual unsigned H323Connection::GetBandwidthUsed (  )  const [virtual]

Get the bandwidth currently used. This totals the open channels and returns the total bandwidth used in 100's of bits/sec

Reimplemented from OpalConnection.

virtual SendUserInputModes H323Connection::GetRealSendUserInputMode (  )  const [virtual]

Get the real user input indication transmission mode. This will return the user input mode that will actually be used for transmissions. It will be the value of GetSendUserInputMode() provided the remote endpoint is capable of that mode.

Reimplemented from OpalConnection.

virtual BOOL H323Connection::SendUserInputString ( const PString &  value  )  [virtual]

Send a user input indication to the remote endpoint. This is for sending arbitrary strings as user indications.

The user indication is sent according to the sendUserInputMode member variable. If SendUserInputAsString then this uses an H.245 "string" UserInputIndication pdu sending the entire string in one go. If SendUserInputAsTone then a separate H.245 "signal" UserInputIndication pdu is sent for each character. If SendUserInputAsInlineRFC2833 then the indication is inserted into the outgoing audio stream as an RFC2833 RTP data pdu.

SendUserInputAsSeparateRFC2833 is not yet supported.

Parameters:
value  String value of indication

Reimplemented from OpalConnection.

virtual BOOL H323Connection::SendUserInputTone ( char  tone,
unsigned  duration = 0 
) [virtual]

Send a user input indication to the remote endpoint. This sends DTMF emulation user input. If something more sophisticated than the simple tones that can be sent using the SendUserInput() function.

A duration of zero indicates that no duration is to be indicated. A non-zero logical channel indicates that the tone is to be syncronised with the logical channel at the rtpTimestamp value specified.

The tone parameter must be one of "0123456789#*ABCD!" where '!' indicates a hook flash. If tone is a ' ' character then a signalUpdate PDU is sent that updates the last tone indication sent. See the H.245 specifcation for more details on this.

The user indication is sent according to the sendUserInputMode member variable. If SendUserInputAsString then this uses an H.245 "string" UserInputIndication pdu sending the entire string in one go. If SendUserInputAsTone then a separate H.245 "signal" UserInputIndication pdu is sent for each character. If SendUserInputAsInlineRFC2833 then the indication is inserted into the outgoing audio stream as an RFC2833 RTP data pdu.

SendUserInputAsSeparateRFC2833 is not yet supported.

Parameters:
tone  DTMF tone code
duration  Duration of tone in milliseconds

Reimplemented from OpalConnection.

virtual BOOL H323Connection::SendUserInputIndicationQ931 ( const PString &  value  )  [virtual]

Send a user input indication to the remote endpoint. This is for sending arbitrary strings as user indications.

This always uses a Q.931 Keypad Information Element in a Information pdu sending the entire string in one go.

Parameters:
value  String value of indication

virtual BOOL H323Connection::SendUserInputIndicationString ( const PString &  value  )  [virtual]

Send a user input indication to the remote endpoint. This is for sending arbitrary strings as user indications.

This always uses an H.245 "string" UserInputIndication pdu sending the entire string in one go.

Parameters:
value  String value of indication

virtual BOOL H323Connection::SendUserInputIndicationTone ( char  tone,
unsigned  duration = 0,
unsigned  logicalChannel = 0,
unsigned  rtpTimestamp = 0 
) [virtual]

Send a user input indication to the remote endpoint. This sends DTMF emulation user input.This uses an H.245 "signal" UserInputIndication pdu.

Parameters:
tone  DTMF tone code
duration  Duration of tone in milliseconds
logicalChannel  Logical channel number for RTP sync.
rtpTimestamp  RTP timestamp in logical channel sync.

virtual BOOL H323Connection::SendUserInputIndication ( const H245_UserInputIndication pdu  )  [virtual]

Send a user input indication to the remote endpoint. The two forms are for basic user input of a simple string using the SendUserInput() function or a full DTMF emulation user input using the SendUserInputTone() function.

An application could do more sophisticated usage by filling in the H245_UserInputIndication structure directly ans using this function.

Parameters:
pdu  Full user indication PDU

virtual void H323Connection::OnUserInputIndication ( const H245_UserInputIndication pdu  )  [virtual]

Call back for remote enpoint has sent user input. The default behaviour calls OnUserInputString() if the PDU is of the alphanumeric type, or OnUserInputTone() if of a tone type.

Parameters:
pdu  Full user indication PDU

virtual H323_RTP_Session* H323Connection::GetSessionCallbacks ( unsigned  sessionID  )  const [virtual]

Get an H323 RTP session for the specified ID. If there is no session of the specified ID, NULL is returned.

virtual RTP_Session* H323Connection::UseSession ( const OpalTransport transport,
unsigned  sessionID,
RTP_QOS rtpqos = NULL 
) [virtual]

Use an RTP session for the specified ID and for the given direction. If there is no session of the specified ID, a new one is created using the information provided in the tranport parameter. If the system does not support the specified transport, NULL is returned.

If this function is used, then the ReleaseSession() function MUST be called or the session is never deleted for the lifetime of the H323 connection.

Reimplemented from OpalConnection.

virtual void H323Connection::ReleaseSession ( unsigned  sessionID  )  [virtual]

Release the session. If the session ID is not being used any more any clients via the UseSession() function, then the session is deleted.

virtual void H323Connection::OnRTPStatistics ( const RTP_Session session  )  const [virtual]

Callback from the RTP session for statistics monitoring. This is called every so many packets on the transmitter and receiver threads of the RTP session indicating that the statistics have been updated.

The default behaviour calls H323EndPoint::OnRTPStatistics().

Parameters:
session  Session with statistics

virtual PString H323Connection::GetSessionCodecNames ( unsigned  sessionID  )  const [virtual]

Get the names of the codecs in use for the RTP session. If there is no session of the specified ID, an empty string is returned.

virtual BOOL H323Connection::RequestModeChange ( const PString &  newModes  )  [virtual]

Make a request to mode change to remote. This asks the remote system to stop it transmitters and start sending one of the combinations specifed.

The modes are separated in the string by
characters, and all of the channels (capabilities) are strings separated by characters. Thus a very simple mode change would be "T.38" which requests that the remote start sending T.38 data and nothing else. A more complicated example would be "G.723\tH.261\nG.729\tH.261\nG.728" which indicates that the remote should either start sending G.723 and H.261, G.729 and H.261 or just G.728 on its own.

Returns FALSE if a mode change is currently in progress, only one mode change may be done at a time.

Parameters:
newModes  New modes to select

virtual BOOL H323Connection::RequestModeChange ( const H245_ArrayOf_ModeDescription newModes  )  [virtual]

Make a request to mode change to remote. This asks the remote system to stop it transmitters and start sending one of the combinations specifed.

Returns FALSE if a mode change is currently in progress, only one mode change may be done at a time.

Parameters:
newModes  New modes to select

virtual BOOL H323Connection::OnRequestModeChange ( const H245_RequestMode pdu,
H245_RequestModeAck ack,
H245_RequestModeReject reject,
PINDEX &  selectedMode 
) [virtual]

Received request for mode change from remote.

Parameters:
pdu  Received PDU
ack  Ack PDU to send
reject  Reject PDU to send
selectedMode  Which mode was selected

virtual void H323Connection::OnModeChanged ( const H245_ModeDescription newMode  )  [virtual]

Completed request for mode change from remote. This is a call back that accurs after the ack has been sent to the remote as indicated by the OnRequestModeChange() return result. This function is intended to actually implement the mode change after it had been accepted.

virtual void H323Connection::OnAcceptModeChange ( const H245_RequestModeAck pdu  )  [virtual]

Received acceptance of last mode change request. This callback indicates that the RequestModeChange() was accepted by the remote endpoint.

Parameters:
pdu  Received PDU

virtual void H323Connection::OnRefusedModeChange ( const H245_RequestModeReject pdu  )  [virtual]

Received reject of last mode change request. This callback indicates that the RequestModeChange() was accepted by the remote endpoint.

Parameters:
pdu  Received PDU, if NULL is a timeout

virtual BOOL H323Connection::RequestModeChangeT38 ( const char *  capabilityNames = "T.38\nT38FaxUDP"  )  [virtual]

Request a mode change to T.38 data.

virtual BOOL H323Connection::GetAdmissionRequestAuthentication ( const H225_AdmissionRequest arq,
H235Authenticators &  authenticators 
) [virtual]

Get separate H.235 authentication for the connection. This allows an individual ARQ to override the authentical credentials used in H.235 based RAS for this particular connection.

A return value of FALSE indicates to use the default credentials of the endpoint, while TRUE indicates that new credentials are to be used.

The default behavour does nothing and returns FALSE.

Parameters:
arq  ARQ being constructed
authenticators  New authenticators for ARQ

H323EndPoint& H323Connection::GetEndPoint (  )  const [inline]

Get the owner endpoint for this connection.

Reimplemented from OpalConnection.

BOOL H323Connection::HadAnsweredCall (  )  const [inline]

Get the call direction for this connection.

BOOL H323Connection::IsGatekeeperRouted (  )  const [inline]

Determined if connection is gatekeeper routed.

unsigned H323Connection::GetDistinctiveRing (  )  const [inline]

Get the distinctive ring code for incoming call. This returns an integer from 0 to 7 that may indicate to an application that different ring cadences are to be used.

void H323Connection::SetDistinctiveRing ( unsigned  pattern  )  [inline]

Set the distinctive ring code for outgoing call. This sets the integer from 0 to 7 that will be used in the outgoing Setup PDU. Note this must be called either immediately after construction or during the OnSendSignalSetup() callback function so the member variable is set befor ethe PDU is sent.

const PString& H323Connection::GetCallToken (  )  const [inline]

Get the internal OpenH323 call token for this connection. Deprecated, only used for backward compatibility.

unsigned H323Connection::GetCallReference (  )  const [inline]

Get the call reference for this connection.

const OpalGloballyUniqueID& H323Connection::GetCallIdentifier (  )  const [inline]

Get the call identifier for this connection. preserved for backwards compatibility with OpenH323 only

const OpalGloballyUniqueID& H323Connection::GetConferenceIdentifier (  )  const [inline]

Get the conference identifier for this connection.

void H323Connection::SetLocalPartyName ( const PString &  name  )  [virtual]

Set the local name/alias from information in the PDU.

Reimplemented from OpalConnection.

const PStringList& H323Connection::GetLocalAliasNames (  )  const [inline]

Get the list of all alias names this connection is using.

virtual void H323Connection::SetRemotePartyInfo ( const H323SignalPDU pdu  )  [virtual]

Set the name/alias of remote end from information in the PDU.

Parameters:
pdu  PDU from which to extract party info.

void H323Connection::SetRemoteApplication ( const H225_EndpointType pdu  ) 

Set the name/alias of remote end from information in the PDU.

Parameters:
pdu  PDU from which to extract application info.

const PString H323Connection::GetRemotePartyCallbackURL (  )  const [virtual]

Get the remote party address. This will return the "best guess" at an address to use in a to call the user again later.

Reimplemented from OpalConnection.

const H323Capabilities& H323Connection::GetLocalCapabilities (  )  const [inline]

Get the remotes capability table for this connection.

const H323Capabilities& H323Connection::GetRemoteCapabilities (  )  const [inline]

Get the remotes capability table for this connection.

unsigned H323Connection::GetRemoteMaxAudioDelayJitter (  )  const [inline]

Get the maximum audio jitter delay.

const H323Transport* H323Connection::GetSignallingChannel (  )  const [inline]

Get the signalling channel being used.

unsigned H323Connection::GetSignallingVersion (  )  const [inline]

Get the signalling channel protocol version number.

const H323Transport& H323Connection::GetControlChannel (  )  const

Get the control channel being used (may return signalling channel).

OpalTransport& H323Connection::GetTransport (  )  const [virtual]

Get the control channel being used (may return signalling channel).

Reimplemented from OpalConnection.

unsigned H323Connection::GetControlVersion (  )  const [inline]

Get the control channel protocol version number.

unsigned H323Connection::GetUUIEsRequested (  )  const [inline]

Get the UUIE PDU monitor bit mask.

void H323Connection::SetUUIEsRequested ( unsigned  mask  )  [inline]

Set the UUIE PDU monitor bit mask.

const PString H323Connection::GetGkAccessTokenOID (  )  const [inline]

Get the iNow Gatekeeper Access Token OID.

void H323Connection::SetGkAccessTokenOID ( const PString &  oid  )  [inline]

Set the iNow Gatekeeper Access Token OID.

const PBYTEArray& H323Connection::GetGkAccessTokenData (  )  const [inline]

Get the iNow Gatekeeper Access Token data.

void H323Connection::SetDestExtraCallInfo ( const PString &  info  )  [inline]

Set the Destionation Extra Call Info memeber.

void H323Connection::SetRemotCallWaiting ( const unsigned  value  )  [inline]

Set the remote call waiting flag

const int H323Connection::GetRemoteCallWaiting (  )  const [inline]

How many caller's are waiting on the remote endpoint? -1 - None 0 - Just this connection n - n plus this connection

void H323Connection::SetEnforcedDurationLimit ( unsigned  seconds  ) 

Set the enforced duration limit for the call. This starts a timer that will automatically shut down the call when it expires.

Parameters:
seconds  max duration of call in seconds

virtual BOOL H323Connection::OnSendFeatureSet ( unsigned  ,
H225_FeatureSet  
) const [virtual]

virtual void H323Connection::OnReceiveFeatureSet ( unsigned  ,
const H225_FeatureSet  
) const [virtual]

virtual BOOL H323Connection::OnOpenIncomingMediaChannels (  )  [virtual]

get the H4507 handler

Returns:
a reference to the H4507 handler

Reimplemented from OpalConnection.

virtual void H323Connection::InternalEstablishedConnectionCheck (  )  [protected, virtual]

Internal function to check if call established. This checks all the criteria for establishing a call an initiating the starting of media channels, if they have not already been started via the fast start algorithm.

BOOL H323Connection::InternalEndSessionCheck ( PPER_Stream &  strm  )  [protected]

void H323Connection::SetRemoteVersions ( const H225_ProtocolIdentifier id  )  [protected]

void H323Connection::MonitorCallStatus (  )  [protected]

H323Connection::PDECLARE_NOTIFIER ( PThread  ,
H323Connection  ,
StartOutgoing   
) [protected]

H323Connection::PDECLARE_NOTIFIER ( PThread  ,
H323Connection  ,
NewOutgoingControlChannel   
) [protected]

H323Connection::PDECLARE_NOTIFIER ( PThread  ,
H323Connection  ,
NewIncomingControlChannel   
) [protected]

virtual OpalMediaStream* H323Connection::InternalCreateMediaStream ( const OpalMediaFormat mediaFormat,
unsigned  sessionID,
BOOL  isSource 
) [protected, virtual]

Reimplemented from OpalConnection.


Member Data Documentation

H323EndPoint& H323Connection::endpoint [protected]

Reimplemented from OpalConnection.

int H323Connection::remoteCallWaiting [protected]

BOOL H323Connection::gatekeeperRouted [protected]

unsigned H323Connection::distinctiveRing [protected]

unsigned H323Connection::callReference [protected]

OpalGloballyUniqueID H323Connection::conferenceIdentifier [protected]

PString H323Connection::localDestinationAddress [protected]

PStringList H323Connection::localAliasNames [protected]

H323Capabilities H323Connection::localCapabilities [protected]

PString H323Connection::destExtraCallInfo [protected]

H323Capabilities H323Connection::remoteCapabilities [protected]

unsigned H323Connection::remoteMaxAudioDelayJitter [protected]

PTimer H323Connection::roundTripDelayTimer [protected]

WORD H323Connection::maxAudioDelayJitter [protected]

unsigned H323Connection::uuiesRequested [protected]

PString H323Connection::gkAccessTokenOID [protected]

PBYTEArray H323Connection::gkAccessTokenData [protected]

BOOL H323Connection::addAccessTokenToSetup [protected]

BOOL H323Connection::alertDone [protected]

H323Transport* H323Connection::signallingChannel [protected]

H323Transport* H323Connection::controlChannel [protected]

OpalListener* H323Connection::controlListener [protected]

BOOL H323Connection::h245Tunneling [protected]

H323SignalPDU* H323Connection::h245TunnelRxPDU [protected]

H323SignalPDU* H323Connection::h245TunnelTxPDU [protected]

H323SignalPDU* H323Connection::setupPDU [protected]

H323SignalPDU* H323Connection::alertingPDU [protected]

H323SignalPDU* H323Connection::connectPDU [protected]

H323SignalPDU* H323Connection::progressPDU [protected]

enum H323Connection::ConnectionStates H323Connection::connectionState [protected]

unsigned H323Connection::h225version [protected]

unsigned H323Connection::h245version [protected]

BOOL H323Connection::h245versionSet [protected]

BOOL H323Connection::doH245inSETUP [protected]

BOOL H323Connection::lastPDUWasH245inSETUP [protected]

BOOL H323Connection::mustSendDRQ [protected]

BOOL H323Connection::mediaWaitForConnect [protected]

BOOL H323Connection::transmitterSidePaused [protected]

BOOL H323Connection::earlyStart [protected]

PString H323Connection::t38ModeChangeCapabilities [protected]

PSyncPoint H323Connection::digitsWaitFlag [protected]

BOOL H323Connection::endSessionNeeded [protected]

PSyncPoint H323Connection::endSessionReceived [protected]

PTimer H323Connection::enforcedDurationLimit [protected]

PChannel* H323Connection::holdMediaChannel [protected]

BOOL H323Connection::isConsultationTransfer [protected]

BOOL H323Connection::isCallIntrusion [protected]

Call Intrusion flag and parameters

unsigned H323Connection::callIntrusionProtectionLevel [protected]

FastStartStates H323Connection::fastStartState [protected]

H323LogicalChannelList H323Connection::fastStartChannels [protected]

OpalMediaStream* H323Connection::transmitterMediaStream [protected]

H245NegMasterSlaveDetermination* H323Connection::masterSlaveDeterminationProcedure [protected]

H245NegTerminalCapabilitySet* H323Connection::capabilityExchangeProcedure [protected]

H245NegLogicalChannels* H323Connection::logicalChannels [protected]

H245NegRequestMode* H323Connection::requestModeProcedure [protected]

H245NegRoundTripDelay* H323Connection::roundTripDelayProcedure [protected]


The documentation for this class was generated from the following file:
Generated on Fri Mar 7 06:33:58 2008 for OPAL by  doxygen 1.5.1