/*
* 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 "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: Main handler for incoming requests
*
*/
#ifndef C_MODEMATPLUGIN_H
#define C_MODEMATPLUGIN_H
#include <atextpluginbase.h>
#include "cmdpluginobserver.h"
/**
* Class for common AT command handler interface
*
* @since S60 TB9.2
*/
NONSHARABLE_CLASS( CATCommandHandlerBase )
{
public:
virtual ~CATCommandHandlerBase() {};
/**
* Reports the support status of an AT command. This is a synchronous API.
*
* @param aCmd The AT command. Its format may vary depending on the
* specification. E.g. in BT HFP case, the command may contain
* a character carriage return (<cr>) in the end.
* @return ETrue if the command is supported; EFalse otherwise.
*/
virtual TBool IsCommandSupported( const TDesC8& aCmd ) = 0;
/**
* Handles an AT command. Cancelling of the pending request is done by
* HandleCommandCancel(). The implementation in the extension plugin should
* be asynchronous.
*
* The extension plugin which accepts this command is responsible to supply
* the result codes and response and to format result codes properly, e.g.
* in BT HFP case, the format should be <cr><lf><result code><cr><lf>
*
* After an extension plugin has handled or decided to reject the given AT
* command, it must inform ATEXT by HandleCommandCompleted() with a proper
* error code.
*
* @since S60 TB9.2
* @param aCmd The AT command to be handled. Its format may vary depending
* on the specification. E.g. in BT HFP case, the command may
* contain a character carriage return (<cr>) in the end.
* @param aReply When passed in, contains the built in answer filled by
* ATEXT if it is not empty; when command handling completes
* successfully, contains the result codes and responses to
* this command; Its ownership always belongs to ATEXT, plugin
* may reallocate its space when needed.
* @param aReplyNeeded Reply needed if ETrue, no reply otherwise. If EFalse,
* the aReply must not contain the reply, otherwise it
* must contain verbose or numeric reply (ATV0/1) or an
* empty string reply (with ATQ).
* @return None
*/
virtual void HandleCommand( const TDesC8& aCmd,
RBuf8& aReply,
TBool aReplyNeeded ) = 0;
/**
* Cancels a pending HandleCommand request.
*
* @since S60 TB9.2
* @return None
*/
virtual void HandleCommandCancel() = 0;
};
/**
* Class for selecting handlers for different AT commands
*
* @since TB9.2
*/
NONSHARABLE_CLASS( CModemAtPlugin ) : public CATExtPluginBase, public MCmdPluginObserver
{
public:
/**
* Two-phased constructor.
* @return Instance of self
*/
static CModemAtPlugin* NewL();
/**
* Destructor.
*/
virtual ~CModemAtPlugin();
private:
CModemAtPlugin();
void ConstructL();
/**
* Reports connection identifier name to the extension plugin.
*
* @since TB9.2
* @param aName Connection identifier name
* @return None
*/
void ReportConnectionName( const TDesC8& aName );
/**
* Reports the support status of an AT command. This is a synchronous API.
*
* @param aCmd The AT command. Its format may vary depending on the
* specification. E.g. in BT HFP case, the command may contain
* a character carriage return (<cr>) in the end.
* @return ETrue if the command is supported; EFalse otherwise.
*/
TBool IsCommandSupported( const TDesC8& aCmd );
/**
* Handles an AT command. Cancelling of the pending request is done by
* HandleCommandCancel(). The implementation in the extension plugin should
* be asynchronous.
*
* The extension plugin which accepts this command is responsible to supply
* the result codes and response and to format result codes properly, e.g.
* in BT HFP case, the format should be <cr><lf><result code><cr><lf>
*
* After an extension plugin has handled or decided to reject the given AT
* command, it must inform ATEXT by HandleCommandCompleted() with a proper
* error code.
*
* @since TB9.2
* @param aCmd The AT command to be handled. Its format may vary depending
* on the specification. E.g. in BT HFP case, the command may
* contain a character carriage return (<cr>) in the end.
* @param aReply When passed in, contains the built in answer filled by
* ATEXT if it is not empty; when command handling completes
* successfully, contains the result codes and responses to
* this command; Its ownership always belongs to ATEXT, plugin
* may reallocate its space when needed.
* @param aReplyNeeded Reply needed if ETrue, no reply otherwise. If EFalse,
* the aReply must not contain the reply, otherwise it
* must contain verbose or numeric reply (ATV0/1) or an
* empty string reply (with ATQ).
* @return None
*/
void HandleCommand( const TDesC8& aCmd, RBuf8& aReply, TBool aReplyNeeded );
/**
* Cancels a pending HandleCommand request.
*
* @since TB9.2
* @return None
*/
void HandleCommandCancel();
/**
* Next reply part's length.
* The value must be equal or less than KDefaultCmdBufLength.
* When the reply from this method is zero, ATEXT stops calling
* GetNextPartOfReply().
*
* @since TB9.2
* @return Next reply part's length if zero or positive
*/
TInt NextReplyPartLength();
/**
* Gets the next part of reply initially set by HandleCommandComplete().
* Length of aNextReply must be equal or less than KDefaultCmdBufLength.
*
* @since TB9.2
* @param aNextReply Next reply
* @return Symbian error code on error, KErrNone otherwise
*/
TInt GetNextPartOfReply( RBuf8& aNextReply );
/**
* Receives unsolicited results. Cancelling of the pending request is done
* by ReceiveUnsolicitedResultCancel(). The implementation in the extension
* plugin should be asynchronous.
*
* @since TB9.2
* @return None
*/
void ReceiveUnsolicitedResult();
/**
* Cancels a pending ReceiveUnsolicitedResult request.
*
* @since TB9.2
* @return None
*/
void ReceiveUnsolicitedResultCancel();
/**
* Reports NVRAM status change to the plugins.
*
* @since TB9.2
* @param aNvram New NVRAM status. Each call of this function is a result
* of DUN extracting the form notified by
* CATExtCommonBase::SendNvramStatusChange(). Each of the
* settings from SendNvramStatusChange() is separated to
* one call of ReportNvramStatusChange().
* @return None
*/
void ReportNvramStatusChange( const TDesC8& aNvram );
/**
* Reports about external handle command error condition.
* This is for cases when for example DUN decided the reply contained an
* error condition but the plugin is still handling the command internally.
* Example: in command line "AT+TEST;ATDT1234" was given. "AT+TEST" returns
* "OK" and "ATDT" returns "CONNECT". Because "OK" and "CONNECT" are
* different reply types the condition is "ERROR" and DUN ends processing.
* This solution keeps the pointer to the last AT command handling plugin
* inside ATEXT and calls this function there to report the error.
* It is to be noted that HandleCommandCancel() is not sufficient to stop
* the processing as the command handling has already finished.
*
* @since TB9.2
* @return None
*/
void ReportExternalHandleCommandError();
/**
* Creates part of reply from the global reply buffer to the destination
* buffer. Used with APIs which need the next part of reply in multipart
* reply requests.
*
* @since TB9.2
* @param aDstBuffer Destination buffer; the next part of reply is stored to
* this buffer.
* @return None
*/
TInt CreatePartOfReply( RBuf8& aDstBuffer );
// from base class MCmdPluginObserver
/**
* From MCmdPluginObserver.
* Creates an AT command reply based on the reply type and completes the
* request to ATEXT. Uses iReplyBuffer for reply storage.
*
* @since TB9.2
* @param aReplyType Type of reply
* @param aDstBuffer Destination buffer; used for the API requiring the
* AT command reply
* @param aSrcBuffer Source buffer; used only if aReplyType is EReplyTypeOther
* @param aError Completion code. If not KErrNone then other arguments are
* ignored and the request is completed to ATEXT with
* EReplyTypeUndefined.
* @return None
*/
TInt CreateReplyAndComplete( TATExtensionReplyType aReplyType,
const TDesC8& aSrcBuffer=KNullDesC8,
TInt aError=KErrNone );
/**
* From MCmdPluginObserver.
* Creates a buffer for "OK" or "ERROR" reply based on the line settings
*
* @since TB9.2
* @param aReplyBuffer Destination buffer for the created reply
* @param aOkReply ETrue if "OK" reply needed,
* EFalse if "ERROR" reply needed
* @return Symbian error code on error, KErrNone otherwise
*/
TInt CreateOkOrErrorReply( RBuf8& aReplyBuffer,
TBool aOkReply );
/**
* From MCmdPluginObserver.
* Returns the array of supported commands
*
* @since TB9.2
* @param aCmd Array of supported commands
* @return Symbian error code on error, KErrNone otherwise
*/
TInt GetSupportedCommands( RPointerArray<HBufC8>& aCmds );
/**
* From MCmdPluginObserver.
* Returns plugin's character value settings (from CATExtPluginBase)
*
* @since TB9.2
* @param aCharType Character's type
* @param aChar Character's value matching aCharType
* @return Symbian error code on error, KErrNone otherwise
*/
TInt GetCharacterValue( TCharacterTypes aCharType, TChar& aChar );
/**
* From MCmdPluginObserver.
* Returns plugin's mode value settings (from CATExtPluginBase)
*
* @since TB9.2
* @param aModeType Mode type
* @param aMode Mode value matching aModeType
* @return Symbian error code on error, KErrNone otherwise
*/
TInt GetModeValue( TModeTypes aModeType, TBool& aMode );
private: // data
/**
* AT commands handler array. Used for mapping HandleCommand() to
* IsCommandSupported() and to limit the number of string comparisons.
*/
RPointerArray<CATCommandHandlerBase> iHandlers;
/**
* Current AT command handler in iHandlers.
* Used when IsCommandSupported() detects a matching handler class.
*/
CATCommandHandlerBase* iHandler;
/**
* Buffer for handle command's command
* Not own.
*/
const TDesC8* iHcCmd;
/**
* Buffer for handle command reply
* Not own.
*/
RBuf8* iHcReply;
/**
* Global reply buffer for the AT command replies
*/
RBuf8 iReplyBuffer;
};
#endif // C_MODEMPLUGIN_H