// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

//

/**

 @file

 @internalComponent

*/

#ifndef L2CAPFECNEGOTIATOR_INL

#define L2CAPFECNEGOTIATOR_INL

// Not needed, but keeps Carbide's semantic analyzer a bit happier.

#include "L2CapFecNegotiator.h"

//

// TFecOptionHandlerDelegator inlines

//

inline TBool TFecOptionHandlerDelegator::IsOptionValid(const TRetransmissionAndFlowControlOption& aFecOption) const

	{

	const TModeSpecificFecOptionHandlerBase* handler = ModeToHandler(aFecOption.LinkMode());

	// handler == NULL means invalid mode field

	return handler && handler->IsOptionValid(aFecOption);

	}

inline TBool TFecOptionHandlerDelegator::IsPeerResponseAcceptable(const TRetransmissionAndFlowControlOption& aPreferred,

																  const TRetransmissionAndFlowControlOption& aPeer) const

	{

#ifdef __FLOG_ACTIVE

	LogCurrentValues(aPreferred, aPeer);

#endif

	__ASSERT_DEBUG(aPeer.LinkMode() == aPreferred.LinkMode(), Panic(EL2CAPPeerAndPreferredChannelModesNotEqual));

	// Logically it's Preferred checking whether Peer is acceptable, so dispatch on preferred.

	// (If we're here then both modes are equal though, so it doesn't really matter, but just

	// sayin' in case it changes).

	return Handler(aPreferred).IsPeerResponseAcceptable(aPreferred, aPeer);

	}

inline TBool TFecOptionHandlerDelegator::BuildPositiveResponse(TRetransmissionAndFlowControlOption& aPreferred,

															   const TRetransmissionAndFlowControlOption& aPeer) const

	{

#ifdef __FLOG_ACTIVE

	LogCurrentValues(aPreferred, aPeer);

#endif

	// Response will have peer - proposed mode so dispatch on peer.

	return Handler(aPeer).BuildPositiveResponse(aPreferred, aPeer);

	}

inline void TFecOptionHandlerDelegator::BuildNegativeResponse(TRetransmissionAndFlowControlOption& aPreferred,

															  const TRetransmissionAndFlowControlOption& aPeer) const

	{

#ifdef __FLOG_ACTIVE

	LogCurrentValues(aPreferred, aPeer);

#endif

	// Response will have our preferred mode so dispatch on preferred.

	Handler(aPreferred).BuildNegativeResponse(aPreferred, aPeer);

	}

inline void TFecOptionHandlerDelegator::PrepareImplicitPeerResponse(TRetransmissionAndFlowControlOption& aImplicitResponse,

																	const TRetransmissionAndFlowControlOption& aPreferred) const

	{

	// Response will have our preferred mode so dispatch on preferred.

	Handler(aPreferred).PrepareImplicitPeerResponse(aImplicitResponse, aPreferred);

	}

inline void TFecOptionHandlerDelegator::SetMaxTransmit(TRetransmissionAndFlowControlOption& aFecOption, TUint8 aMaxTransmit) const

	{

	Handler(aFecOption).SetMaxTransmit(aFecOption, aMaxTransmit);

	}

inline void TFecOptionHandlerDelegator::ZeroUnspecifiedRequestFields(TRetransmissionAndFlowControlOption& aFecOption) const

	{

	Handler(aFecOption).ZeroUnspecifiedRequestFields(aFecOption);

	}

inline void TFecOptionHandlerDelegator::ZeroUnspecifiedResponseFields(TRetransmissionAndFlowControlOption& aFecOption) const

	{

	Handler(aFecOption).ZeroUnspecifiedResponseFields(aFecOption);

	}

//

// TL2CapSingleDirectionFecNegotiatorBase inlines

//

inline TL2CapSingleDirectionFecNegotiatorBase::TL2CapSingleDirectionFecNegotiatorBase(const TL2CapFecNegotiator& aFecNegotiator)

 :	iFecNegotiator(aFecNegotiator),

	iConfigStatus(EOptionConfigOutstanding)

	{}

inline TL2CapConfigurationOptionGroupBase::TOptionConfigStatus TL2CapSingleDirectionFecNegotiatorBase::ConfigOptionStatus() const

	{

	return iConfigStatus;

	}

inline void TL2CapSingleDirectionFecNegotiatorBase::SetPeer(const TRetransmissionAndFlowControlOption& aFec)

	{

	iPeer = aFec;

	}

inline void TL2CapSingleDirectionFecNegotiatorBase::SetPreferred(const TRetransmissionAndFlowControlOption& aFec)

	{

	iPreferred = aFec;

	}

inline const TRetransmissionAndFlowControlOption& TL2CapSingleDirectionFecNegotiatorBase::Peer() const

	{

	return iPeer;

	}

inline const TRetransmissionAndFlowControlOption& TL2CapSingleDirectionFecNegotiatorBase::Preferred() const

	{

	return iPreferred;

	}

inline TL2CapIncomingFecNegotiator::TL2CapIncomingFecNegotiator(const TL2CapFecNegotiator& aFecNegotiator)

 :	TL2CapSingleDirectionFecNegotiatorBase(aFecNegotiator)

	{}

inline TL2CapOutgoingFecNegotiator::TL2CapOutgoingFecNegotiator(const TL2CapFecNegotiator& aFecNegotiator)

 :	TL2CapSingleDirectionFecNegotiatorBase(aFecNegotiator),

	iIncludeValueInPositiveConfigResponse(EFalse)

	{}

inline TBool TL2CapOutgoingFecNegotiator::NeedToIncludeInPositiveConfigResponse()

	{

	return iIncludeValueInPositiveConfigResponse;

	}

inline void TL2CapOutgoingFecNegotiator::SetIncludeInPositiveConfigResponse(TBool aVal)

    {

    iIncludeValueInPositiveConfigResponse = aVal;

    }

//

// TL2CapFecNegotiator inlines

//

inline TL2CapFecNegotiator::TL2CapFecNegotiator()

 :	iIncomingNegotiator(*this),

 	iOutgoingNegotiator(*this),

 	iNegotiationBehavior(EState1),

 	iDesiredMode(EL2CAPBasicMode)

	{}

inline TInt TL2CapFecNegotiator::PeerRequestsOption(const TRetransmissionAndFlowControlOption& aFecOption)

	{

	if (iModeSpecificHandlers.IsOptionValid(aFecOption))

		{

		return iOutgoingNegotiator.ProcessPeerValue(aFecOption);

		}

	else

		{

		return KErrBadPacketReceived;

		}

	}

inline TInt TL2CapFecNegotiator::PeerRequestsLastAcceptedValue()

	{

	TInt err = iOutgoingNegotiator.ProcessPeerValue(iOutgoingNegotiator.Peer());

	iOutgoingNegotiator.SetIncludeInPositiveConfigResponse(EFalse);

	return err;

	}

inline TInt TL2CapFecNegotiator::PeerRejectsOption(const TRetransmissionAndFlowControlOption& aFecOption)

	{

	TInt err = KErrNone;

    // Peer has sent us an Unacceptable Parameters response with a Retransmission And Flow Control

    // option in it. The only useful information there is the Channel Mode field - this is the one

    // actually being rejected, all the rest of them are non-negotiable (informational).

    // Some implementations send their default values for those informational parameters, others

    // just set them to 0 (that's what we do). Whatever their values are, we don't use them - we

    // use our own based on the mode suggested by the remote.

    // This is why we don't (and can't - they may be 0) check all the parameters with IsOptionValid

    // - channel mode is all we're interested in.

    if (TRetransmissionAndFlowControlOption::IsModeValid(aFecOption.LinkMode()))

		{

		iIncomingNegotiator.ProcessPeerValue(aFecOption, ETrue);

		}

	else

		{

		err = KErrBadPacketReceived;

		}

	return err;

	}

inline TInt TL2CapFecNegotiator::PeerAcceptsOption(const TRetransmissionAndFlowControlOption& aFecOption)

	{

	TInt err = KErrNone;

	if (iModeSpecificHandlers.IsOptionValid(aFecOption))

		{

		iIncomingNegotiator.ProcessPeerValue(aFecOption, EFalse);

		}

	else

		{

		err = KErrBadPacketReceived;

		}

	return err;

	}

inline void TL2CapFecNegotiator::PeerAcceptsOption()

	{

	iIncomingNegotiator.ProcessImplicitPeerValue();

	}

inline TBool TL2CapFecNegotiator::NeedToIncludeInPositiveConfigResponse()

	{

	return iOutgoingNegotiator.NeedToIncludeInPositiveConfigResponse();

	}

inline const TL2CapEntityInfo& TL2CapFecNegotiator::PeerSupportedModes() const

	{

	return iPeerSupportedModes;

	}

inline TL2CapFecNegotiator::TNegotiationBehavior TL2CapFecNegotiator::NegotiationBehavior() const

	{

	return iNegotiationBehavior;

	}

inline TL2CapChannelMode TL2CapFecNegotiator::DesiredMode() const

	{

	return iDesiredMode;

	}

inline TUint8 TL2CapFecNegotiator::MaxTransmit() const

    {

    return iMaxTransmit;

    }

inline const TFecOptionHandlerDelegator& TL2CapFecNegotiator::ModeSpecificHandlers() const

	{

	return iModeSpecificHandlers;

	}

inline const TRetransmissionAndFlowControlOption& TL2CapFecNegotiator::IncomingPreferred() const

	{

	return iIncomingNegotiator.Preferred();

	}

inline const TRetransmissionAndFlowControlOption& TL2CapFecNegotiator::OutgoingPreferred() const

	{

	return iOutgoingNegotiator.Preferred();

	}

inline TL2CapConfigurationOptionGroupBase::TOptionConfigStatus TL2CapFecNegotiator::IncomingConfigOptionStatus() const

	{

	return iIncomingNegotiator.ConfigOptionStatus();

	}

inline TL2CapConfigurationOptionGroupBase::TOptionConfigStatus TL2CapFecNegotiator::OutgoingConfigOptionStatus() const

	{

	return iOutgoingNegotiator.ConfigOptionStatus();

	}

inline TL2CapDataControllerConfig TL2CapFecNegotiator::DataControllerConfig() const

	{

	return TL2CapDataControllerConfig(OutgoingLinkMode(),

									  OutgoingTxWindowSize(),

									  OutgoingMaxTransmit(),

									  OutgoingRetransmissionTimeout(),

									  IncomingMonitorTimeout(),

									  IncomingTxWindowSize(),

									  IncomingRetransmissionTimeout(),

									  IncomingMaximumPDUSize());

	}

// The general rule for methods below is that for the Outgoing direction we get the parameters

// from the Preferred fields since in case of wildcard params (TxWin, MPS), these fields contain

// the correct minimized values. For the same reason the Incoming direction parameters are fetched

// from the Peer values.

// Note that it's not always that simple in case of non-negotiated parameters like MaxTransmit,

// Retransmission & Monitor TO, which is the reason these methods exist.

inline TL2CapChannelMode TL2CapFecNegotiator::OutgoingLinkMode() const

	{

	return iOutgoingNegotiator.Preferred().LinkMode();

	}

inline TL2CapChannelMode TL2CapFecNegotiator::IncomingLinkMode() const

	{

	return iIncomingNegotiator.Peer().LinkMode();

	}

inline TUint8 TL2CapFecNegotiator::OutgoingLinkModeAsUnsignedByte() const

	{

	return iOutgoingNegotiator.Preferred().LinkModeAsUnsignedByte();

	}

inline TUint8 TL2CapFecNegotiator::IncomingLinkModeAsUnsignedByte() const

	{

	return iIncomingNegotiator.Peer().LinkModeAsUnsignedByte();

	}

inline TUint8 TL2CapFecNegotiator::OutgoingTxWindowSize() const

	{

	return iOutgoingNegotiator.Preferred().TxWindowSize();

	}

inline TUint8 TL2CapFecNegotiator::IncomingTxWindowSize() const

	{

	return iIncomingNegotiator.Peer().TxWindowSize();

	}

inline TUint8 TL2CapFecNegotiator::OutgoingMaxTransmit() const

	{

	// Peer sends us the value to use in its Config Request.

	return iOutgoingNegotiator.Peer().MaxTransmit();

	}

inline TUint8 TL2CapFecNegotiator::IncomingMaxTransmit() const

	{

	// We send the peer the value to use in our Config Request.

	return iIncomingNegotiator.Preferred().MaxTransmit();

	}

inline TUint16 TL2CapFecNegotiator::OutgoingRetransmissionTimeout() const

	{

	return iOutgoingNegotiator.Preferred().RetransmissionTimeout();

	}

inline TUint16 TL2CapFecNegotiator::IncomingRetransmissionTimeout() const

	{

	return iIncomingNegotiator.Peer().RetransmissionTimeout();

	}

// Outgoing traffic -> Incoming S-Frames -> Monitor TO that our peer will use.

inline TUint16 TL2CapFecNegotiator::OutgoingMonitorTimeout() const

	{

	if (iIncomingNegotiator.Preferred().LinkMode() == EL2CAPEnhancedRetransmissionMode ||

		iIncomingNegotiator.Preferred().LinkMode() == EL2CAPStreamingMode)

		{

		// Peer sends the time-outs it'll use in its Config Response.

		return iIncomingNegotiator.Peer().MonitorTimeout();

		}

	else

		{

		// Negotiated in the direction it relates to.

		return iOutgoingNegotiator.Preferred().MonitorTimeout();

		}

	}

// Incoming traffic -> Outgoing S-Frames -> Monitor TO that we will use.

inline TUint16 TL2CapFecNegotiator::IncomingMonitorTimeout() const

	{

	if (iIncomingNegotiator.Preferred().LinkMode() == EL2CAPEnhancedRetransmissionMode ||

		iIncomingNegotiator.Preferred().LinkMode() == EL2CAPStreamingMode)

		{

		// We send the time-outs we'll use in our Config Response.

		return iOutgoingNegotiator.Preferred().MonitorTimeout();

		}

	else

		{

		// Negotiated in the direction it relates to.

		return iIncomingNegotiator.Peer().MonitorTimeout();

		}

	}

inline TUint16 TL2CapFecNegotiator::OutgoingMaximumPDUSize() const

	{

	return iOutgoingNegotiator.Preferred().MaximumPDUSize();

	}

inline TUint16 TL2CapFecNegotiator::IncomingMaximumPDUSize() const

	{

	return iIncomingNegotiator.Peer().MaximumPDUSize();

	}

#endif /*L2CAPFECNEGOTIATOR_INL*/