/usr/include/opal/h323/h323neg.h is in libopal-dev 3.10.2~dfsg-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* h323neg.h
*
* H.323 protocol handler
*
* Open H323 Library
*
* Copyright (c) 1998-2001 Equivalence Pty. Ltd.
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is Open H323 Library.
*
* The Initial Developer of the Original Code is Equivalence Pty. Ltd.
*
* Portions of this code were written with the assisance of funding from
* Vovida Networks, Inc. http://www.vovida.com.
*
* Contributor(s): ______________________________________.
*
* $Revision: 25091 $
* $Author: rjongbloed $
* $Date: 2011-01-22 12:19:24 -0600 (Sat, 22 Jan 2011) $
*/
#ifndef OPAL_H323_H323NEG_H
#define OPAL_H323_H323NEG_H
#ifdef P_USE_PRAGMA
#pragma interface
#endif
#include <opal/buildopts.h>
#if OPAL_H323
#include <h323/h323pdu.h>
#include <h323/channels.h>
class H323EndPoint;
class H323Connection;
///////////////////////////////////////////////////////////////////////////////
/**Base class for doing H245 negotiations
*/
class H245Negotiator : public PObject
{
PCLASSINFO(H245Negotiator, PObject);
public:
H245Negotiator(H323EndPoint & endpoint, H323Connection & connection);
protected:
PDECLARE_NOTIFIER(PTimer, H245Negotiator, HandleTimeout);
H323EndPoint & endpoint;
H323Connection & connection;
PTimer replyTimer;
};
/**Determine the master and slave on a H245 connection as per H245 section 8.2
*/
class H245NegMasterSlaveDetermination : public H245Negotiator
{
PCLASSINFO(H245NegMasterSlaveDetermination, H245Negotiator);
public:
H245NegMasterSlaveDetermination(H323EndPoint & endpoint, H323Connection & connection);
PBoolean Start(PBoolean renegotiate);
void Stop();
PBoolean HandleIncoming(const H245_MasterSlaveDetermination & pdu);
PBoolean HandleAck(const H245_MasterSlaveDeterminationAck & pdu);
PBoolean HandleReject(const H245_MasterSlaveDeterminationReject & pdu);
PBoolean HandleRelease(const H245_MasterSlaveDeterminationRelease & pdu);
void HandleTimeout(PTimer &, INT);
PBoolean IsMaster() const { return status == e_DeterminedMaster; }
PBoolean IsDetermined() const { return state == e_Idle && status != e_Indeterminate; }
protected:
PBoolean Restart();
enum States {
e_Idle, e_Outgoing, e_Incoming,
e_NumStates
} state;
#if PTRACING
static const char * GetStateName(States s);
friend ostream & operator<<(ostream & o, States s) { return o << GetStateName(s); }
#endif
DWORD determinationNumber;
unsigned retryCount;
enum MasterSlaveStatus {
e_Indeterminate, e_DeterminedMaster, e_DeterminedSlave,
e_NumStatuses
} status;
#if PTRACING
static const char * GetStatusName(MasterSlaveStatus s);
friend ostream & operator<<(ostream & o , MasterSlaveStatus s) { return o << GetStatusName(s); }
#endif
};
/**Exchange capabilities on a H245 connection as per H245 section 8.3
*/
class H245NegTerminalCapabilitySet : public H245Negotiator
{
PCLASSINFO(H245NegTerminalCapabilitySet, H245Negotiator);
public:
H245NegTerminalCapabilitySet(H323EndPoint & endpoint, H323Connection & connection);
PBoolean Start(PBoolean renegotiate, PBoolean empty = false);
void Stop(PBoolean dec = false);
PBoolean HandleIncoming(const H245_TerminalCapabilitySet & pdu);
PBoolean HandleAck(const H245_TerminalCapabilitySetAck & pdu);
PBoolean HandleReject(const H245_TerminalCapabilitySetReject & pdu);
PBoolean HandleRelease(const H245_TerminalCapabilitySetRelease & pdu);
void HandleTimeout(PTimer &, INT);
bool HasSentCapabilities() const { return state >= e_InProgress; }
bool IsSendingCapabilities() const { return state == e_InProgress; }
bool ConfrimedCapabilitiesSent() const { return state == e_Confirmed; }
bool HasReceivedCapabilities() const { return receivedCapabilites; }
protected:
enum States {
e_Idle, e_InProgress, e_Confirmed,
e_NumStates
} state;
#if PTRACING
static const char * GetStateName(States s);
friend ostream & operator<<(ostream & o, States s) { return o << GetStateName(s); }
#endif
unsigned inSequenceNumber;
unsigned outSequenceNumber;
PBoolean receivedCapabilites;
};
/**Logical Channel signalling on a H245 connection as per H245 section 8.4
*/
class H245NegLogicalChannel : public H245Negotiator
{
PCLASSINFO(H245NegLogicalChannel, H245Negotiator);
public:
H245NegLogicalChannel(H323EndPoint & endpoint,
H323Connection & connection,
const H323ChannelNumber & channelNumber);
H245NegLogicalChannel(H323EndPoint & endpoint,
H323Connection & connection,
H323Channel & channel);
~H245NegLogicalChannel();
virtual PBoolean Open(
const H323Capability & capability,
unsigned sessionID,
unsigned replacementFor = 0
);
virtual PBoolean Close();
virtual PBoolean HandleOpen(const H245_OpenLogicalChannel & pdu);
virtual PBoolean HandleOpenAck(const H245_OpenLogicalChannelAck & pdu);
virtual PBoolean HandleOpenConfirm(const H245_OpenLogicalChannelConfirm & pdu);
virtual PBoolean HandleReject(const H245_OpenLogicalChannelReject & pdu);
virtual PBoolean HandleClose(const H245_CloseLogicalChannel & pdu);
virtual PBoolean HandleCloseAck(const H245_CloseLogicalChannelAck & pdu);
virtual PBoolean HandleRequestClose(const H245_RequestChannelClose & pdu);
virtual PBoolean HandleRequestCloseAck(const H245_RequestChannelCloseAck & pdu);
virtual PBoolean HandleRequestCloseReject(const H245_RequestChannelCloseReject & pdu);
virtual PBoolean HandleRequestCloseRelease(const H245_RequestChannelCloseRelease & pdu);
virtual void HandleTimeout(PTimer &, INT);
H323Channel * GetChannel();
bool IsAwaitingEstablishment() const { return state == e_AwaitingEstablishment; }
bool IsEstablished() const { return state == e_Established; }
protected:
virtual void Release();
H323Channel * channel;
H323ChannelNumber channelNumber;
enum States {
e_Released,
e_AwaitingEstablishment,
e_Established,
e_AwaitingRelease,
e_AwaitingConfirmation,
e_AwaitingResponse,
e_NumStates
} state;
#if PTRACING
static const char * GetStateName(States s);
friend ostream & operator<<(ostream & o, States s) { return o << GetStateName(s); }
#endif
friend class H245NegLogicalChannels;
};
PDICTIONARY(H245LogicalChannelDict, H323ChannelNumber, H245NegLogicalChannel);
/**Dictionary of all Logical Channels
*/
class H245NegLogicalChannels : public H245Negotiator
{
PCLASSINFO(H245NegLogicalChannels, H245Negotiator);
public:
H245NegLogicalChannels(H323EndPoint & endpoint, H323Connection & connection);
virtual void Add(H323Channel & channel);
virtual PBoolean Open(
const H323Capability & capability,
unsigned sessionID,
unsigned replacementFor = 0
);
virtual PBoolean Close(unsigned channelNumber, PBoolean fromRemote);
virtual PBoolean HandleOpen(const H245_OpenLogicalChannel & pdu);
virtual PBoolean HandleOpenAck(const H245_OpenLogicalChannelAck & pdu);
virtual PBoolean HandleOpenConfirm(const H245_OpenLogicalChannelConfirm & pdu);
virtual PBoolean HandleReject(const H245_OpenLogicalChannelReject & pdu);
virtual PBoolean HandleClose(const H245_CloseLogicalChannel & pdu);
virtual PBoolean HandleCloseAck(const H245_CloseLogicalChannelAck & pdu);
virtual PBoolean HandleRequestClose(const H245_RequestChannelClose & pdu);
virtual PBoolean HandleRequestCloseAck(const H245_RequestChannelCloseAck & pdu);
virtual PBoolean HandleRequestCloseReject(const H245_RequestChannelCloseReject & pdu);
virtual PBoolean HandleRequestCloseRelease(const H245_RequestChannelCloseRelease & pdu);
H323ChannelNumber GetNextChannelNumber();
PINDEX GetSize() const { return channels.GetSize(); }
H323Channel * GetChannelAt(PINDEX i);
H323Channel * FindChannel(unsigned channelNumber, PBoolean fromRemote);
H245NegLogicalChannel & GetNegLogicalChannelAt(PINDEX i);
H245NegLogicalChannel * FindNegLogicalChannel(unsigned channelNumber, PBoolean fromRemote);
H323Channel * FindChannelBySession(unsigned rtpSessionId, PBoolean fromRemote);
void RemoveAll();
protected:
H323ChannelNumber lastChannelNumber;
H245LogicalChannelDict channels;
};
/**Request mode change as per H245 section 8.9
*/
class H245NegRequestMode : public H245Negotiator
{
PCLASSINFO(H245NegRequestMode, H245Negotiator);
public:
H245NegRequestMode(H323EndPoint & endpoint, H323Connection & connection);
virtual PBoolean StartRequest(const PString & newModes);
virtual PBoolean StartRequest(const H245_ArrayOf_ModeDescription & newModes);
virtual PBoolean HandleRequest(const H245_RequestMode & pdu);
virtual PBoolean HandleAck(const H245_RequestModeAck & pdu);
virtual PBoolean HandleReject(const H245_RequestModeReject & pdu);
virtual PBoolean HandleRelease(const H245_RequestModeRelease & pdu);
virtual void HandleTimeout(PTimer &, INT);
protected:
PBoolean awaitingResponse;
unsigned inSequenceNumber;
unsigned outSequenceNumber;
};
/**Request mode change as per H245 section 8.9
*/
class H245NegRoundTripDelay : public H245Negotiator
{
PCLASSINFO(H245NegRoundTripDelay, H245Negotiator);
public:
H245NegRoundTripDelay(H323EndPoint & endpoint, H323Connection & connection);
PBoolean StartRequest();
PBoolean HandleRequest(const H245_RoundTripDelayRequest & pdu);
PBoolean HandleResponse(const H245_RoundTripDelayResponse & pdu);
void HandleTimeout(PTimer &, INT);
PTimeInterval GetRoundTripDelay() const { return roundTripTime; }
PBoolean IsRemoteOffline() const { return retryCount == 0; }
protected:
PBoolean awaitingResponse;
unsigned sequenceNumber;
PTimeInterval tripStartTime;
PTimeInterval roundTripTime;
unsigned retryCount;
};
#endif // OPAL_H323
#endif // OPAL_H323_H323NEG_H
/////////////////////////////////////////////////////////////////////////////
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