/*

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

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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: 

*

*/

#include <e32std.h>

#include <iscapi.h>

#include <iscnokiadefinitions.h>

#include <pn_const.h>

#ifndef NCP_COMMON_BRIDGE_FAMILY       

#include <nsisi.h>

#endif

#include <pipeisi.h>

#include <pipe_sharedisi.h>

#include <tisi.h>

#include <at_modemisi.h>

#include "cmodemathandler.h"

#include "cmodematpipecontroller.h"

#include "modemattrace.h"

#include "cmodematsrv.h"

#define KCommandBits 0x0f

#define KMaxBufferLength 1024

#define KTransactionIdBitsShift 4

#define KFiller 0

#define KIndicationOrderMsgLength 14

#define KObjectIdLength 2

#define KEightBits 8

#define KDefaultTId 0

const TInt KUnsubscribeFourEvents(4);

const TInt KAlignToFourBytes(4);

#ifdef __WINSCW__

#define KEmulatedReplyMsgLength 50

#endif

CModemAtHandler* CModemAtHandler::NewL( CModemAtSrv& aServer )

    {

    CModemAtHandler* self = new (ELeave) CModemAtHandler( aServer );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

CModemAtHandler::~CModemAtHandler()

    {

    C_TRACE(( _T("CModemAtHandler::~CModemAtHandler()") ));

    TBuf8<KUnsubscribeFourEvents> events;

    events.Append( KFiller );

    events.Append( KFiller );  

    events.Append( KFiller );

    events.Append( KFiller );

    if( iIscApi )

        {

        iIscApi->CustomFunction( EIscNokiaEventSubscribe, &events );

        }

    if(iPipeController)

        {

        delete iPipeController;

        iPipeController = NULL;

        } 

    Cancel();

    if( iIscApi )

        {

        iIscApi->Close();

        delete iIscApi;

        }

   }

CModemAtHandler::CModemAtHandler( CModemAtSrv& aServer )

    : CActive( EPriorityHigh ),

    iServer( aServer ),

    iIscApi( NULL ),

    iReceivedMessageBuffer( NULL ),

    iMessageBufferSize( KMaxBufferLength ),

    iReceivePtr( 0, 0 ),

    iReceiveMessageLength( 0 ),

    iReceivedMessage( NULL ),

    iPepObjId(0),

    iPipeController(NULL),

    {

    C_TRACE (( _T("CModemAtHandler::CModemAtHandler") ));

    }

void CModemAtHandler::DoCancel()

    {

    C_TRACE (( _T("CModemAtHandler::DoCancel()") ));

    iIscApi->ReceiveCancel();

    }

void CModemAtHandler::RunL()

    {

    C_TRACE (( _T("CModemAtHandler::RunL()") ));

    if( iStatus == KErrNone ) 

        {

        TIsiReceiveC receiveMessage = TIsiReceiveC( *iReceivedMessageBuffer );

        DUMP_MESSAGE( iReceivePtr );

        if( iReceivedMessageBuffer->Length() > ISI_HEADER_OFFSET_MESSAGEID )

            {

            switch(receiveMessage.Get8bit(ISI_HEADER_OFFSET_RESOURCEID))

                {

                case PN_AT_MODEM: //AT MODEM COMMANDS

                    C_TRACE(_L("PN_AT_MODEM"));

                    switch( receiveMessage.Get8bit( ISI_HEADER_OFFSET_MESSAGEID ) )

                        {

                        case AT_MODEM_CONNECT_RESP: 

                            HandleModemConnectResp( receiveMessage );

                            break;

                        case AT_MODEM_DISCONNECT_RESP:

                            C_TRACE(_L("AT_MODEM_DISCONNECT_RESP"));

                            break;

                        case AT_MODEM_CMD_RESP:

                            HandleATResponse( receiveMessage );

                            break;

                        case AT_MODEM_SIGNAL_IND:

                            HandleSignalInd( receiveMessage );

                            break;

                        case AT_MODEM_UNSOLICITED_DATA_IND:

                            HandleUnsolicitedData( receiveMessage );

                            break;

                        case AT_MODEM_INTERMEDIATE_DATA_IND:

                            HandleIntermediateDataInd( receiveMessage );

                            break;

                        case AT_MODEM_DATA_REDIRECT_IND:

                            HandleRedirectInd( receiveMessage );

                            break;

                        case AT_MODEM_DATA_REDIRECT_RESULT_RESP:

                            C_TRACE((_L("AT_MODEM_DATA_REDIRECT_RESULT_RESP")));

                            HandleRedirectResultResp( receiveMessage );

                            break;

                        case AT_MODEM_SIGNAL_DETECTED_RESP:

                            C_TRACE((_L("AT_MODEM_SIGNAL_DETECTED_RESP")));

                            HandleSignalDetectedResp(  receiveMessage  );

                            break;

                        default: 

                            C_TRACE(_L("CModemAtHandler::RunL: Not a valid message"))  ;

                            TRACE_ASSERT_ALWAYS;

                            break;

                         } //switch( receiveMessage.Get8bit( ISI_HEADER_OFFSET_MESSAGEID ) )

                    break;  //case PN_AT_MODEM: //AT MODEM COMMANDS

#ifndef NCP_COMMON_BRIDGE_FAMILY

                case PN_NAME_SERVICE: 

                    C_TRACE(_L("PN_NAME_SERVICE"));

                    iPipeController->HandleNameServiceMessage(receiveMessage);

                    break;

                case PN_PIPE:

                    C_TRACE(_L("Pipe message"));

                    iPipeController->HandlePipeServiceMessage(receiveMessage);

                    break;

#endif

                default:  

                    C_TRACE((_L("Unknown resource id")));

                    TRACE_ASSERT_ALWAYS;

                    break; 

                }

            } //if( receiveMessageBuffer->Length() > ISI_HEADER_OFFSET_MESSAGEID )

        else 

            {

            C_TRACE(_L("ISI essage is too short"));

            TRACE_ASSERT_ALWAYS;

            }

        //Start receiving ISI messages again

        iReceivePtr.Set( iReceivedMessageBuffer->Des() );

        iIscApi->Receive( iStatus, iReceivePtr, iReceiveMessageLength );

        SetActive();

        } // if( iStatus == KErrNone )

    else 

        {

        TRACE_ASSERT_ALWAYS;

        } 

    }

void CModemAtHandler::ConstructL()

    {

   C_TRACE (( _T("CModemAtHandler::ConstructL()") ));

    CActiveScheduler::Add( this );

    iIscApi = new ( ELeave ) RIscApi;

    C_TRACE(_L("RIscApi created"));

    //used with intermediate data ind

    //can be removed, when AT_MODEM_INTERMEDIATE_DATA_IND supports transactionid 

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

        {

        iLastTransactionId[i]=0;

        }

#ifndef __WINSCW__

      OpenChannelL();

#ifndef NCP_COMMON_BRIDGE_FAMILY

#endif

#else

      iEmulatedValue = 0;

#endif

    }

TInt CModemAtHandler::SendATCommand(const TUint8 aDteId,

    const TATPluginInterface aPluginType,

    const TUint8 aMessageType,

    const TDesC8& aCmd)

    {

    C_TRACE (( _T(">>CModemAtHandler::SendATCommand()") ));

    TInt err = KErrNone;

    // aMessageType contains normal AT-cmd (0) or Nvram-query (1)

    TUint transactionId= (aPluginType << KTransactionIdBitsShift) | aMessageType;

    //used with intermediate data ind

    //can be removed, when AT_MODEM_INTERMEDIATE_DATA_IND supports transactionid        

    iLastTransactionId[aDteId] = transactionId;  //messages are routed to correct plugin by transaction id

    C_TRACE((_L("transaction id %d, plugintype %d, aMessageType %d"), transactionId, aPluginType, aMessageType));

    C_TRACE((_L("iLastTransctionId[%d] = %d "),aDteId,iLastTransactionId[aDteId]));

    #ifdef __WINSCW__

    iDteId = aDteId;

    iChannel = aMessageType;

    iPluginType = aPluginType;

    HandleATResponse();

    return KErrNone;

    #endif

    TInt size = ISI_HEADER_SIZE + AT_MODEM_CMD_REQ_OFFSET_CMDLINEBUFFER + aCmd.Length();

    C_TRACE((_L("Message length %d"), sizeWithFillers));

    HBufC8* message = HBufC8::New( sizeWithFillers );

    if( message )

      {

      TPtr8 messageptr = message->Des();

      TIsiSend isimessage( messageptr, sizeWithFillers );

      isimessage.Set8bit( ISI_HEADER_OFFSET_RESOURCEID, PN_AT_MODEM );       

      isimessage.Set8bit( ISI_HEADER_SIZE + AT_MODEM_CMD_REQ_OFFSET_TID, transactionId );

      isimessage.Set8bit( ISI_HEADER_SIZE + AT_MODEM_CMD_REQ_OFFSET_MESSAGEID, AT_MODEM_CMD_REQ );

      isimessage.Set8bit( ISI_HEADER_SIZE + AT_MODEM_CMD_REQ_OFFSET_DTEID, aDteId );

      isimessage.Set8bit( ISI_HEADER_SIZE + AT_MODEM_CMD_REQ_OFFSET_FILLERBYTE1, 0 );

      C_TRACE((_L("AT command length: %d"), aCmd.Length()));

      isimessage.Set16bit( ISI_HEADER_SIZE + AT_MODEM_CMD_REQ_OFFSET_LENGTH, (TUint16) aCmd.Length() );

      const TUint8* ptr = aCmd.Ptr();

      for ( TInt i = 0; i < aCmd.Length(); i++ )

          {

          C_TRACE((_L("message %d, 0x%x '%c'"), i, ptr[i], ptr[i]));

          isimessage.Set8bit(ISI_HEADER_SIZE + AT_MODEM_CMD_REQ_OFFSET_CMDLINEBUFFER + i, ptr[i]);

          }

      for( TInt j = sizeWithFillers; j < size; j++ )

          {

          C_TRACE((_L("Add filler [%d]"), j));

          isimessage.Set8bit( j , KFiller );

          }

      isimessage.Complete();

      C_TRACE(_L("Created ISI-message"));

      DUMP_MESSAGE( messageptr );

      err = iIscApi->Send( messageptr );

      TRACE_ASSERT( err == KErrNone );

      delete message;

      message = NULL;

      }

    else

      {

      C_TRACE(_L("No memory - error in sending ISI message from heap"));

      TRACE_ASSERT_ALWAYS;

      }

    C_TRACE (( _T("<<CModemAtHandler::SendATCommand() err: %d"), err ));

    return err;

    }

void CModemAtHandler::OpenChannelL()

    {

    C_TRACE (( _T("CModemAtHandler::OpenChannelL()") ));

    TRequestStatus openStatus;

    iIscApi->Open( EIscNokiaAtController, openStatus, EOwnerThread );

    User::WaitForRequest( openStatus );

    TRACE_ASSERT( !openStatus.Int());

    if( iReceivedMessageBuffer )

        {

        delete iReceivedMessageBuffer;

        iReceivedMessageBuffer = NULL;

        }

    iReceivedMessageBuffer = HBufC8::NewL(iMessageBufferSize);

    TRACE_ASSERT(iReceivedMessageBuffer);

    iReceivePtr.Set( iReceivedMessageBuffer->Des() );

    C_TRACE(_L("Start receive ISI messages"));

    iIscApi->Receive( iStatus, iReceivePtr, iReceiveMessageLength );

    SetActive();

    C_TRACE(_L("Start receive indications"));

    TBuf8<KIndicationOrderMsgLength> events;

    events.Append( PN_AT_MODEM );

    events.Append( AT_MODEM_INTERMEDIATE_DATA_IND );  

    events.Append( PN_AT_MODEM );

    events.Append( AT_MODEM_SIGNAL_IND );  

    events.Append( PN_AT_MODEM );

    events.Append( AT_MODEM_UNSOLICITED_DATA_IND );  

    events.Append( PN_AT_MODEM );

    events.Append( AT_MODEM_DATA_REDIRECT_IND );  

    events.Append( PN_PIPE );

    events.Append( PNS_PEP_STATUS_IND );

#ifndef NCP_COMMON_BRIDGE_FAMILY       

    //name add ind

    events.Append( PN_NAMESERVICE );

    events.Append( PNS_NAME_ADD_IND );  

    events.Append( PN_NAMESERVICE );

    events.Append( PNS_NAME_REMOVE_IND );

#else

    events.Append( 0 );

    events.Append( 0 );  

    events.Append( 0 );

    events.Append( 0 );

#endif

    iIscApi->CustomFunction(EIscNokiaEventSubscribe,&events);

    TBuf8<KObjectIdLength> objId;

    iIscApi->GetChannelInfo(EIscNokiaAtController, objId);

    iPepObjId = (((TUint16)(objId[0]))<<KEightBits) + objId[1];

    C_TRACE((_L("PepObjId 0x%x"),iPepObjId));

    iPipeController = CModemAtPipeController::NewL(*iIscApi, iPepObjId, *this); 

    C_TRACE((_L("iPipeController 0x%x"),iPipeController ));

    ASSERT_PANIC_ALWAYS( iPipeController );

    }

void CModemAtHandler::HandleATResponse( const TIsiReceiveC& aMessage )

    {

    C_TRACE (( _T("CModemAtHandler::HandleATResponse()") ));

    TInt dteId = aMessage.Get8bit( ISI_HEADER_SIZE+ AT_MODEM_CMD_RESP_OFFSET_DTEID ) ;

    TUint transactionId = aMessage.Get8bit( ISI_HEADER_SIZE + AT_MODEM_CMD_RESP_OFFSET_TID );

    TUint8 command = transactionId & KCommandBits; //normal AT-cmd or Nvram-query

    TInt length = aMessage.Get16bit( ISI_HEADER_SIZE+AT_MODEM_CMD_RESP_OFFSET_LENGTH );

    C_TRACE(( _L("DteId: %d AT (0) or nvram command (1): %d Response length %d"), dteId, command, length ));

    /**

     * Plugintype can be read from transaction id:

     * TUint8 pluginType = transactionId >> KTransactionIdBitsShift;

     * (TATPluginInterface) pluginType

     *

     * Current implementation uses first in first out response completion

     * so plugintype is not needed.

     */

    C_TRACE(( _L("Plugintype: %d"), transactionId >> KTransactionIdBitsShift ));

    iServer.HandleATResponse( dteId,  

      aMessage.GetData( ISI_HEADER_SIZE + AT_MODEM_CMD_RESP_OFFSET_CMDLINEBUFFER, length),

      command );

    }

#ifdef __WINSCW__

void CModemAtHandler::HandleATResponse( )

    {

    C_TRACE (( _T("CModemAtHandler::HandleATResponse()") ));

    //reply back immediately

    const TInt KReplyLength(50);

    TBuf8<KReplyLength> replyEmulated = _L8("\r\nAT TEST REPLY");

    replyEmulated.AppendNum(iEmulatedValue++);

    replyEmulated.Append(_L8("\r\n"));

    iServer.HandleATResponse( iDteId, replyEmulated, 0 /* 0 = AT-cmd, 1 = nvram */);

    }

#endif

TInt CModemAtHandler::Connect(const TUint8 aDteId)

    {

    C_TRACE((_L("Connecting with dteid:%d "), aDteId));

    SetDisconnected( EFalse );

    #ifdef __WINSCW__ //emulate, modem is connected

    iServer.BroadcastModemConnected( aDteId, KErrNone );

    iDteId = aDteId;

    return KErrNone;

    #endif

#ifndef NCP_COMMON_BRIDGE_FAMILY

    iPipeController->LinkDteIdToPipe( aDteId );

#endif

    TInt size = ISI_HEADER_SIZE + SIZE_AT_MODEM_CONNECT_REQ;

    HBufC8* message = HBufC8::New( size );

    TRACE_ASSERT( message );

    TPtr8 messageptr = message->Des();

    TIsiSend isimessage( messageptr, size );

    isimessage.Set8bit(ISI_HEADER_OFFSET_RESOURCEID, PN_AT_MODEM); 

    isimessage.Set8bit(ISI_HEADER_SIZE + AT_MODEM_CONNECT_REQ_OFFSET_TID, KDefaultTId);

    isimessage.Set8bit(ISI_HEADER_SIZE + AT_MODEM_CONNECT_REQ_OFFSET_MESSAGEID, AT_MODEM_CONNECT_REQ);

    isimessage.Set8bit(ISI_HEADER_SIZE + AT_MODEM_CONNECT_REQ_OFFSET_DTEID, aDteId);

    isimessage.Set8bit(ISI_HEADER_SIZE + AT_MODEM_CONNECT_REQ_OFFSET_FILLERBYTE1, KFiller);

    isimessage.Complete();

    DUMP_MESSAGE( messageptr );

    TInt err = iIscApi->Send( messageptr );

    TRACE_ASSERT( err == KErrNone );

    delete message;

    message = NULL;

    return err;

    }

void CModemAtHandler::SetDisconnected( TBool aIsDisconnected )

    {

    C_TRACE (( _T("CModemAtHandler::SetDisconnected(%d)"),aIsDisconnected ));

    iDisconnected = aIsDisconnected;

    }

TBool CModemAtHandler::IsDisconnected()

    {

    C_TRACE (( _T("CModemAtHandler::IsDisconnected(%d)"),iDisconnected ));

    return iDisconnected;

    }

TBool CModemAtHandler::IsPluginConnected()

    {

    C_TRACE (( _T("CModemAtHandler::IsPluginConnected() sessions: %d"), iServer.SessionCount() ));

    return iServer.SessionCount() > 0;

    }

void CModemAtHandler::RemovePipe( const TUint8 aDteId )

    {

    C_TRACE(( _T("CModemAtHandler::RemovePipe()")));

    iDisconnected = ETrue;

#ifndef NCP_COMMON_BRIDGE_FAMILY

    iPipeController->RemovePipe( aDteId );

#endif

    }

TInt CModemAtHandler::Disconnect( const TUint8 aDteId )

    {

    C_TRACE (( _T("CModemAtHandler::Disconnect(%d)"),aDteId ));

    #ifdef __WINSCW__

    iDteId = aDteId;

    return KErrNone;

    #endif

    TInt size = ISI_HEADER_SIZE + SIZE_AT_MODEM_DISCONNECT_REQ;

    HBufC8* message = HBufC8::New( size );

    TRACE_ASSERT( message );

    TPtr8 messageptr = message->Des();

    TIsiSend isimessage( messageptr, size );

    isimessage.Set8bit(ISI_HEADER_OFFSET_RESOURCEID,PN_AT_MODEM);

    isimessage.Set8bit(ISI_HEADER_SIZE + AT_MODEM_DISCONNECT_REQ_OFFSET_TID, 0);

    isimessage.Set8bit(ISI_HEADER_SIZE + AT_MODEM_DISCONNECT_REQ_OFFSET_MESSAGEID,

      AT_MODEM_DISCONNECT_REQ);

    isimessage.Set8bit(ISI_HEADER_SIZE + AT_MODEM_DISCONNECT_REQ_OFFSET_DTEID, aDteId);

    isimessage.Set8bit(ISI_HEADER_SIZE + AT_MODEM_DISCONNECT_REQ_OFFSET_FILLERBYTE1, KFiller);

    isimessage.Complete();

    C_TRACE (( _T("CModemAtHandler::Disconnect Sending AT_MODEM_DISCONNECT_REQ")));

    TInt err = iIscApi->Send(messageptr);

    TRACE_ASSERT( err == KErrNone );

    delete message;

    return err;

    }

void CModemAtHandler::HandleModemConnectResp( const TIsiReceiveC& aMessage )

    {

    C_TRACE (( _T("CModemAtHandler::HandleModemConnectResp()") ));

    TInt dteId= aMessage.Get8bit(ISI_HEADER_SIZE+ AT_MODEM_CONNECT_RESP_OFFSET_DTEID);

    TInt status = aMessage.Get8bit(ISI_HEADER_SIZE+ AT_MODEM_CONNECT_RESP_OFFSET_RESULT);

    TInt err = KErrGeneral;

    if( status == AT_MODEM_RESULT_OK )

        {

        C_TRACE(_L("Connected ok, AT_MODEM_RESULT_OK received"));

        err = KErrNone;