/*

* Copyright (c) 2007-2008 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:  implementation of sipmxresolver

*

*/

// INCLUDE FILES

#include "sipmxresolver.h"

#include "csipclientresolverutils.h"

#include <e32base.h>

#include <e32std.h>

#include <e32property.h>

//for checking CS call status

#include <ctsydomainpskeys.h>

//SIP message content parsing APIs

#include <sipheaderbase.h>

#include <sipacceptcontactheader.h>

#include <sipaddress.h>

#include <sdpdocument.h>

#include <sdpmediafield.h>

#include <sdpcodecstringpool.h>

#include <sdpcodecstringconstants.h>

#include <sdpattributefield.h>

#include <sipstrings.h>

#include <sipallowheader.h>

#include <sipsupportedheader.h>

//For checking dynamic voip status and MuS availability

#include <featmgr.h>

#include <centralrepository.h>

#include <settingsinternalcrkeys.h>

//Multimedia Sharing client API

#include <musmanager.h>

//Incoming Call Monitor API

#include <icmapi.h>

// CONSTANTS

_LIT8( KFTagChar, "+" ); 						// All feature tags start with +

_LIT8( KVSFeatureTag, "+g.3gpp.cs-voice" );		// For checking VS specific tag

_LIT8( KPoCFeatureTag, "+g.poc.talkburst" ); 	// PoC specific tag (for ruling out)

_LIT8( KContentType, "application/sdp" );		// For content-type header

_LIT8( KMediaTypeApp, "application" );        	// For content-type header checks

_LIT8( KMediaSubtypeSdp, "sdp" );            	// For content-type header checks

_LIT8( KSendOnly, "sendonly" );            		// For attribute checks

_LIT8( KApplicationAttr, "application" );   	// For attribute checks

_LIT8( KXApplicationAttr, "X-application" );	// For attribute checks

_LIT8( KNokiaRtvs, "com.nokia.rtvs" );       	// For attribute checks

_LIT8( KSIPMethodsInAllowHeader, "INVITE,ACK,CANCEL,OPTIONS,BYE,PRACK,SUBSCRIBE,REFER,NOTIFY,UPDATE");	// SIP Methods allowed by various plugins

_LIT8( KSIPExtensionsSupported, "100rel,timer,sec-agree"); //Extensions supported by various plugins

/**

 * Cleanup function for RPointerArray

 * Called in case of a leave in SupportedSdpMediasL

 */

void CleanupSdpMediasArray( TAny* aObj )

    {

    if ( aObj )

        {

        static_cast<RPointerArray<CSdpMediaField>*>( aObj )->ResetAndDestroy();

        }

    }

// ============================ MEMBER FUNCTIONS =============================

// ---------------------------------------------------------------------------

// CSipMXResolver::CSipMXResolver

// C++ default constructor can NOT contain any code, that

// might leave.

// ---------------------------------------------------------------------------

//

CSipMXResolver::CSipMXResolver() 

    {

    }

// ---------------------------------------------------------------------------

// CSipMXResolver::ConstructL

// Symbian 2nd phase constructor can leave.

// ---------------------------------------------------------------------------

// 

void CSipMXResolver::ConstructL()

    {

    SIPMXRLOG( "[SIPMXRESOLVER] -> CSipMXResolver::ConstructL()" )

    // Open sdp string pool (needed in media field checks)

    TRAPD( err, SdpCodecStringPool::OpenL() );

    switch ( err )

	    {

    	case KErrNone:

	    	{

	    	//close pool at destructor, not opened by others

			iCloseStringPool = ETrue;

			break;

	    	}

	    case KErrAlreadyExists:

	    	{

	    	//already opened, do not try to close at destructor

	    	iCloseStringPool = EFalse;

	    	break;

	    	}

	    default:

	    	{

	    	User::Leave( err );

	    	}

	    }

    // Check VoIP and Multimedia Sharing availability

    FeatureManager::InitializeLibL();

    TInt dynvoip = 0;

    CRepository* repository = CRepository::NewL( KCRUidTelephonySettings );

    repository->Get( KDynamicVoIP, dynvoip );

    delete repository;

    iVoIPEnabled = ( dynvoip && FeatureManager::FeatureSupported( KFeatureIdCommonVoip ) );

    if ( FeatureManager::FeatureSupported( KFeatureIdMultimediaSharing ) )

        {

        iMuSManager = CMusManager::NewL();

        }

    FeatureManager::UnInitializeLib();

    // initialize media type strings

    iAudioType = SdpCodecStringPool::StringPoolL().StringF(

                    SdpCodecStringConstants::EMediaAudio,

                        SdpCodecStringPool::StringTableL() );

    iVideoType = SdpCodecStringPool::StringPoolL().StringF(

                    SdpCodecStringConstants::EMediaVideo,

                        SdpCodecStringPool::StringTableL() );

    SIPMXRLOG( "[SIPMXRESOLVER] <- CSipMXResolver::ConstructL()" )

    }

// ---------------------------------------------------------------------------

// CSipMXResolver::NewL

// Two-phased constructor.

// ---------------------------------------------------------------------------

// 

CSipMXResolver* CSipMXResolver::NewL()

    {

    CSipMXResolver* self = new( ELeave ) CSipMXResolver;

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self);

    return self;

    }

// Destructor

CSipMXResolver::~CSipMXResolver()

    {

    SIPMXRLOG( "[SIPMXRESOLVER] -> CSipMXResolver::~CSipMXResolver()" )

    delete iMuSManager;

    iAudioType.Close();

    iVideoType.Close();

    if ( iCloseStringPool )

	    {

	    SdpCodecStringPool::Close();

	    }

    SIPMXRLOG( "[SIPMXRESOLVER] <- CSipMXResolver::~CSipMXResolver()" )

    }

// ---------------------------------------------------------------------------

// CSipMXResolver::MatchAcceptContactsL

// ---------------------------------------------------------------------------

// 

TBool CSipMXResolver::MatchAcceptContactsL(

            RStringF aMethod,

            const CUri8& /*aRequestUri*/,

            const RPointerArray<CSIPHeaderBase>& aHeaders,

            const TDesC8& /*aContent*/,

            const CSIPContentTypeHeader* /*aContentType*/,

            TUid& aClientUid )

    {

    SIPMXRLOG( "[SIPMXRESOLVER] -> CSipMXResolver::MatchAcceptContactsL()" )

    TBool match = EFalse;

    // check if we have active CS call

    // and MM Sharing is enabled (otherwise this can't be MuS)

    if ( iMuSManager && IsCSCallActive() )

        {

        if ( CheckForACHeaderTagL( aHeaders, KVSFeatureTag ) )

            {

            match = ETrue;

            aClientUid = ResolveVSUidL( aMethod );

            }

        }

    SIPMXRLOGP( \

    "[SIPMXRESOLVER] <- CSipMXResolver::MatchAcceptContactsL(), ret:%d", match )

    return match;

    }

// ---------------------------------------------------------------------------

// CSipMXResolver::MatchEventL

// ---------------------------------------------------------------------------

// 

TBool CSipMXResolver::MatchEventL(

            RStringF /*aMethod*/,

            const CUri8& /*aRequestUri*/,

            const RPointerArray<CSIPHeaderBase>& /*aHeaders*/,

            const TDesC8& /*aContent*/,

            const CSIPContentTypeHeader* /*aContentType*/,

            TUid& /*aClientUid*/)

    {

    //SipMXResolver returns always EFalse for MatchEventL calls

    SIPMXRLOG( "[SIPMXRESOLVER] <-> CSipMXResolver::MatchEventL()" )

    return EFalse;

    }

// ---------------------------------------------------------------------------

// CSipMXResolver::MatchRequestL

// ---------------------------------------------------------------------------

// 

TBool CSipMXResolver::MatchRequestL(

            RStringF aMethod,

            const CUri8& aRequestUri,

            const RPointerArray<CSIPHeaderBase>& aHeaders,

            const TDesC8& aContent,

            const CSIPContentTypeHeader* aContentType,

            TUid& aClientUid )

    {

    SIPMXRLOG( "[SIPMXRESOLVER] -> CSipMXResolver::MatchRequestL()" )

    TBool match = EFalse;

    //poc specific requests will not be processed

    TBool poc = CheckForACHeaderTagL( aHeaders, KPoCFeatureTag );

    //OPTIONS and INVITE requests are processed

    TBool requestok = ( aMethod == SIPStrings::StringF( SipStrConsts::EOptions ) ||

         aMethod == SIPStrings::StringF( SipStrConsts::EInvite ) );

    //application/sdp content type is required

    TBool contentok = ( aContent.Length() > 0 && aContentType &&

         aContentType->MediaType().CompareF( KMediaTypeApp ) == 0 &&

         aContentType->MediaSubtype().CompareF( KMediaSubtypeSdp ) == 0 );

    // do further checks only if we have either VoIP and/or MuS active,

    // content type must be valid and accept-contact is not poc specific

    if ( ( iVoIPEnabled || iMuSManager ) && requestok && contentok && !poc )

        {

        CSdpDocument* sdpDocument = CSdpDocument::DecodeLC( aContent );

        // determine the parameters

        TBool hasAudio = CheckForMedia( sdpDocument, iAudioType );

        TBool hasVideo = CheckForMedia( sdpDocument, iVideoType );

        TBool cscall = IsCSCallActive();

        if ( iMuSManager && hasVideo && hasAudio && cscall )

            {

            // both audio and video medias present and cs call on

            // and multimedia sharing enabled =>

            // we need to do some further resolving for client

            if ( CheckForVSAttributes( sdpDocument->MediaFields() ) )

                {

                // this is VS

                match = ETrue;

                aClientUid = ResolveVSUidL( aMethod );

                }

            else if ( iVoIPEnabled )

                {

                // no vs attributes and voip status is enabled

                match = ETrue;

                ResolveCPPluginUidL( aClientUid, aRequestUri );

                }

            else

                {

                // possible voip match, but voip not activated

                match = EFalse;

                }

            }

        else if ( iMuSManager && hasVideo && cscall )

            {

            //video media only && cs call ongoing && multimedia sharing enabled

            // => Multimedia Sharing

            match = ETrue;

            aClientUid = ResolveVSUidL( aMethod );

            }

        else if ( hasAudio && iVoIPEnabled )

            {

            // audio only or audio and video and no cs call + voip supported

            // => this is VoIP

            match = ETrue;

            ResolveCPPluginUidL( aClientUid, aRequestUri );

            }

        else

            {

            // no medias or has video but no CS call or has audio

            // but voip status is disabled 

            // => no match

            match = EFalse;

            }

        CleanupStack::PopAndDestroy( sdpDocument );

        }

    else if ( aMethod == SIPStrings::StringF( SipStrConsts::EInvite ) &&

    		  iVoIPEnabled && !poc && aContent.Length() == 0 )

    	{

    	// Pull model: this is a re-Invite without content

    	ResolveCPPluginUidL( aClientUid, aRequestUri );

    	match = ETrue;

    	}

    else

    	{

    	//no match

    	match = EFalse;

        }

    SIPMXRLOGP( \

    "[SIPMXRESOLVER] <- CSipMXResolver::MatchRequestL(), ret:%d", match )

    return match;

    }

// ---------------------------------------------------------------------------

// CSipMXResolver::ConnectSupported

// ---------------------------------------------------------------------------

// 

TBool CSipMXResolver::ConnectSupported()

    {

    return ETrue;

    }

// ---------------------------------------------------------------------------

// CSipMXResolver::ConnectL

// ---------------------------------------------------------------------------

//

void CSipMXResolver::ConnectL( const TUid& aClientUid )

    {

    SIPMXRLOGP(\

    "[SIPMXRESOLVER] -> CSipMXResolver::ConnectL(), uid:%d", aClientUid.iUid )

    // If Uid matches with MuS, forward to MusManager

    if ( iMuSManager &&

         ( aClientUid.iUid == CMusManager::ESipOptions ||

           aClientUid.iUid == CMusManager::ESipInviteDesired ||

           aClientUid.iUid == CMusManager::ESipInviteNotDesired ) )

        {

        iMuSManager->HandleSipRequestL(

                  ( CMusManager::TRequestType ) aClientUid.iUid );

        }

    else

        {

        // start through ICM

        TInt result = RProperty::Set( KPSUidICMIncomingCall,

        		KPropertyKeyICMPluginUID, aClientUid.iUid );

        User::LeaveIfError( result );

        }

    SIPMXRLOG( "[SIPMXRESOLVER] <- CSipMXResolver::ConnectL()" )

    }

// ---------------------------------------------------------------------------

// CSipMXResolver::CancelConnect

// ---------------------------------------------------------------------------

// 

void CSipMXResolver::CancelConnect( const TUid& /*aClientUid*/ )

    {

    SIPMXRLOG( "[SIPMXRESOLVER] <-> CSipMXResolver::CancelConnect()" )

    // No implementation for VoIP / MuS.

    }

// ---------------------------------------------------------------------------

// CSipMXResolver::SupportedContentTypesL

// ---------------------------------------------------------------------------

// 

RPointerArray<CSIPContentTypeHeader> CSipMXResolver::SupportedContentTypesL()

    {

    RPointerArray<CSIPContentTypeHeader> ret;

    CSIPContentTypeHeader* ctype = CSIPContentTypeHeader::DecodeL( KContentType );

    CleanupStack::PushL( ctype );

    ret.AppendL( ctype );

    CleanupStack::Pop( ctype );

    return ret;

    }

// ---------------------------------------------------------------------------

// CSipMXResolver::SupportedSdpMediasL

// ---------------------------------------------------------------------------

// 

RPointerArray<CSdpMediaField> CSipMXResolver::SupportedSdpMediasL()

    {

    // Initialise return array

    RPointerArray<CSdpMediaField> ret;

    TCleanupItem tci( CleanupSdpMediasArray, &ret );

    CleanupStack::PushL( tci );

    // media field descriptors

    _LIT8( KMuSField1, "m=video 0 RTP/AVP 96\r\na=application:com.nokia.rtvs\r\na=X-application:com.nokia.rtvs\r\n" );

    _LIT8( KMuSField2, "m=audio 0 RTP/AVP 97\r\n" );

    _LIT8( KVoIPField1, "m=video 0 RTP/AVP 0\r\n" );

    _LIT8( KVoIPField2, "m=application 0 tcp wb\r\n" );

    _LIT8( KVoIPField3, "m=audio 0 RTP/AVP 0\r\n" );

    _LIT8( KVoIPField4, "m=audio 0 RTP/SAVP 0\r\n" );

    CSdpMediaField* field = NULL;

    // add media fields to array

    if ( iMuSManager )

        {

        field = CSdpMediaField::DecodeLC( KMuSField1 );

        ret.AppendL( field ); // ownership to array

        CleanupStack::Pop( field );

        field = CSdpMediaField::DecodeLC( KMuSField2 );

        ret.AppendL( field );

        CleanupStack::Pop( field );

        }

    if ( iVoIPEnabled )

        {

        field = CSdpMediaField::DecodeLC( KVoIPField1 );

        ret.AppendL( field );

        CleanupStack::Pop( field );

        field = CSdpMediaField::DecodeLC( KVoIPField2 );

        ret.AppendL( field );

        CleanupStack::Pop( field );

        field = CSdpMediaField::DecodeLC( KVoIPField3 );

        ret.AppendL( field );

        CleanupStack::Pop( field );

        field = CSdpMediaField::DecodeLC( KVoIPField4 );

        ret.AppendL( field );

        CleanupStack::Pop( field );

        }

    CleanupStack::Pop(); // tcleanupitem

    return ret;

    }

// ---------------------------------------------------------------------------

// CSipMXResolver::AddClientSpecificHeadersForOptionsResponseL

// ---------------------------------------------------------------------------

// 

void CSipMXResolver::AddClientSpecificHeadersForOptionsResponseL(

    RPointerArray<CSIPHeaderBase>& aHeaders )

    {

    SIPMXRLOG( "[SIPMXRESOLVER] -> \

    CSipMXResolver::AddClientSpecificHeadersForOptionsResponseL()" )

	//Add Allow Header		

	RPointerArray<CSIPAllowHeader> allowheaders = 

	    CSIPAllowHeader::DecodeL(KSIPMethodsInAllowHeader);

	TInt count = allowheaders.Count();

	for(TInt i = 0; i<count; i++)

		{

		User::LeaveIfError(aHeaders.Append(allowheaders[i]));

		}

	allowheaders.Reset();

	//Add Supported Header

	RPointerArray<CSIPSupportedHeader> supportedheaders = 

	    CSIPSupportedHeader::DecodeL(KSIPExtensionsSupported);

	count = supportedheaders.Count();

	for(TInt j = 0; j<count; j++)

		{

		User::LeaveIfError(aHeaders.Append(supportedheaders[j]));

		}

	supportedheaders.Reset();

    }

// ---------------------------------------------------------------------------

// CSipMXResolver::IsCsCallActive

// ---------------------------------------------------------------------------

// 

TBool CSipMXResolver::IsCSCallActive() const

    {

    SIPMXRLOG( "[SIPMXRESOLVER] -> CSipMXResolver::IsCSCallActive()" )

    TBool retval = EFalse;

    TInt callType = KErrNone;

    RProperty::Get( KPSUidCtsyCallInformation,

    		KCTsyCallType, callType );

    if ( EPSCTsyCallTypeCSVoice == callType )

        {

        TInt callState = KErrNone;

        RProperty::Get( KPSUidCtsyCallInformation,

        		KCTsyCallState, callState );

        if ( EPSCTsyCallStateConnected == callState ||

             EPSCTsyCallStateHold == callState )

            {

            retval = ETrue;

            }

        }

    SIPMXRLOGP( \