/*

* Copyright (c) 2002-2010 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:  Connection Monitor server.

*

*/

#ifndef CONNMONSERV_H

#define CONNMONSERV_H

#include <e32base.h>

_LIT( KConnMonStartupSemaphore, "ConnMonStartupSemaphore" );

// Security policy

const TUint KConnMonPolicyRangeCount = 11;

const TInt KConnMonPolicyRanges[KConnMonPolicyRangeCount] =

    {

    0,   //range is 0-2 inclusive

    3,   //range is 3-7 inclusive

    8,   //range is 8-12 inclusive

    13,  //range is 13

    14,  //range is 14

    15,  //range is 15

    16,  //range is 16-499 inclusive

    500, //range is 500-507 inclusive

    508, //range is 508-599 inclusive

    600, //range is 600-601 inclusive

    602  //range is 602-KMaxTInt inclusive

    };

const TUint8 KConnMonPolicyElementsIndex[KConnMonPolicyRangeCount] =

    {

    CPolicyServer::EAlwaysPass,     // Applies to  0th range (request number: 0-2)

                                            //EReqGetConnectionCount

                                            //EReqGetConnectionInfo

                                            //EReqGetSubConnectionInfo

    CPolicyServer::ECustomCheck,    // Applies to  1st range (request number: 3-7)

                                            //EReqGetIntAttribute

                                            //EReqGetUintAttribute

                                            //EReqGetBoolAttribute

                                            //EReqGetStringAttribute

                                            //EReqGetPckgAttribute

    CPolicyServer::ECustomCheck,    // Applies to  2nd range (request number: 8-12)

                                            //EReqSetIntAttribute

                                            //EReqSetUintAttribute

                                            //EReqSetBoolAttribute

                                            //EReqSetStringAttribute

                                            //EReqSetPckgAttribute

    CPolicyServer::EAlwaysPass,     // Applies to  3rd range (request number: 13)

                                            //EReqCancelAsyncRequest

    CPolicyServer::EAlwaysPass,     // Applies to  4th range (request number: 14)

                                            //EReqReceiveEvent

    CPolicyServer::EAlwaysPass,     // Applies to  5th range (request number: 15)

                                            //EReqCancelReceiveEvent

    CPolicyServer::ENotSupported,   // Applies to  6th range (request number: 16-499)

    4,                              // Applies to  7th range (request number: 500-507)

                                            //EReqPluginCreateSubSession

                                            //EReqPluginCloseSubSession

                                            //EReqPluginRegisterAttribute

                                            //EReqPluginCancelRegisterAttribute

                                            //EReqPluginEvent

                                            //EReqPluginGetQuery

                                            //EReqPluginCancelGetQuery

                                            //EReqPluginAttribute

    CPolicyServer::ENotSupported,    // Applies to  8th range (request number: 508-599)

    CPolicyServer::ENotSupported,    // Applies to  9th range (request number: 600-601)

                                     // Used internally in communicating with plugin

                                            //EReqInternalSetThreshold

                                            //EReqInternalResetThreshold

    CPolicyServer::ENotSupported     // Applies to 10th range (request number: 602-KMaxTInt)

    };

const CPolicyServer::TPolicyElement KConnMonPolicyElements[] =

    {

    { _INIT_SECURITY_POLICY_C1( ECapabilityNetworkServices ), CPolicyServer::EFailClient },

    { _INIT_SECURITY_POLICY_C1( ECapabilityNetworkControl ), CPolicyServer::EFailClient },

    { _INIT_SECURITY_POLICY_C1( ECapabilityReadDeviceData ), CPolicyServer::EFailClient },

    { _INIT_SECURITY_POLICY_C1( ECapabilityReadUserData ), CPolicyServer::EFailClient },

    { _INIT_SECURITY_POLICY_C2( ECapabilityNetworkServices,

                                ECapabilityNetworkControl ), CPolicyServer::EFailClient }

    };

const CPolicyServer::TPolicy KConnMonPolicy =

    {

    CPolicyServer::EAlwaysPass, // Specifies all connect attempts should pass

    KConnMonPolicyRangeCount,

    KConnMonPolicyRanges,

    KConnMonPolicyElementsIndex,

    KConnMonPolicyElements,

    };

// Function prototypes

void PanicServer( TInt aPanic );

// Forward declarations

class CConnMonScheduler;

class CConnMonDelayedShutdown;

class CConnMonIAP;

class CEventQueue;

class TConnMonBearer;

class CConnMonCommsDatCache;

class CConnMonAvailabilityManager;

class CConnMonBearerGroupManager;

class CConnMonCommsDatNotifier;

class TEvent;

class TConnMonIapInfo;

class TConnMonSNAPInfo;

class TConnMonId;

class CCellularDataUsageKeyUpdater;

class CConnMonDialUpOverrideNotifier;

class CConnMonDialUpOverrideTimer;

/**

* CConnMonServer

*/

NONSHARABLE_CLASS( CConnMonServer ) : public CPolicyServer

    {

public:

    CConnMonServer();

    void ConstructL();

    ~CConnMonServer();

public:

    /**

     * Increments the session counter.

     */

    void IncrementSessions();

    /**

     * Decrements the session counter.

     * @param aEventInfo Event to be added.

     */

    void DecrementSessions();

    /**

     * Offers the event to all clients that are listening.

     * @param aEvent Event to be sent to the clients.

     * @param aNumOffered On return, the number of clients that actually

     *        have issued a receive reques.

     */

    void SendEventToSessions( const TEvent& aEvent, TInt& aNumOffered );

    /**

     * Offers the latest data volume information to all clients.

     * @param aConnectionId Connection Id.

     * @param aDlData Downlink data in bytes.

     * @param aUIData Uplink data in bytes.

     * @param aStatus Status received with data volumes from RConnection.

     */

    void SendDataVolumesToSessions(

            const TUint aConnectionId,

            const TUint aDlData,

            const TUint aUlData,

            const TInt aStatus );

    /**

     * Offers the latest activity information to all clients.

     * @param aConnectionId Connection Id.

     * @param aActivity Connection activity information.

     * @param aStatus Status received with activity from RConnection.

     */

    void SendActivityToSessions(

            const TUint aConnectionId,

            const TBool aActivity,

            const TInt aStatus );

    /**

     * Removes connection settings (thresholds) from sessions.

     * @param aConnectionId Connection Id.

     */

    void RemoveConnSettingsFromSessions( const TUint aConnectionId );

    /**

     * Gets the number of clients that are listening to the events.

     * @return Number of clients listening.

     */

    TInt NumberOfListeners();

    /**

     * Calculates the new (smallest) threshold

     * @param aConnectionId Connection Id.

     * @param aThresholdType Type of the threshold. See TConnMonThreshold.

     * @param aThreshold On return, the new threshold value.

     */

    void CalculateThreshold(

            const TUint aConnectionId,

            const TInt& aThresholdType,

            TUint& aThreshold );

    /**

     * Panics the client thread (because client gave a bad descriptor).

     * @param aPanic The panic code.

     */

    void PanicClient( TInt aPanic ) const;

    /**

     * Panics the client thread (because client gave a bad descriptor).

     * @param aMsg Reference to the client request message.

     * @param aPanic The panic code.

     */

    void PanicClient( const RMessage2& aMsg, const TInt aPanic ) const;

    /**

     * Scheduler calls Error() method when server's RunL() has a leave.

     * @param aError The error code.

     */

    void Error( TInt aError );

    /**

     * Custom security checking for IPCs marked with TSpecialCase::ECustomCheck.

     * @param aMsg The IPC message from the client.

     * @return The result of the security check (TCustomResult::EPass/TCustomResult::EFail).

     */

    TCustomResult CustomSecurityCheckL(

            const RMessage2& aMsg,

            TInt& aAction,

            TSecurityInfo& aMissing );

    /**

     * Gets a pointer to the iap module.

     * @return A pointer to the iap module.

     */

    inline CConnMonIAP* Iap() { return iIap; }

    /**

     * Get available IAP IDs for the IAPs with bearer aBearerId

     */

    TInt GetAvailableIaps( const TUint aBearerId, TConnMonIapInfo& aIapInfo );

    /**

     * Get available SANP IDs

     */

    void GetAvailableSnaps( TConnMonSNAPInfo& aSnapInfo );

    /**

     * Get available SANP IDs

     */

    TInt GetAvailableSnaps( RArray<TConnMonId>& aSnapIds );

    /**

     * Gets a pointer to event queue.

     * @return A pointer to the event queue.

     */

    inline CEventQueue* EventQueue() { return iEventQueue; }

    /**

     * Produces object containers (needed by subsessions) with unique ids within the server.

     * @return A object container.

     */

    CObjectCon* NewContainerL();

    /**

     * Removes from index and deletes the object container.

     * @param aContainer The container to be deleted.

     * @return A object container.

     */

    void RemoveContainer( CObjectCon* aContainer );

    /**

     * Tries to find plug-in supporting the attribute.

     * @param aType The type of the request.

     * @param aMessage The client message.

     * @return KErrRequestPending if plug-in was found, KErrNotSupported if not.

     */

    TInt SendRequestToPlugin(

            const TInt aType,

            const RMessage2& aMessage,

            const TBool aToAllPlugins = EFalse );

    /**

     * Cancels attribute requests issued by a client from plug-ins..

     * @param aType The type of the attribute (TInt, TUint, TBool...).

     * @return Void.

     */

    void CancelAttributeRequestsFromPlugins(

            const RThread& aClient,

            const TInt aType );

    /**

     * Gets Availability Manager.

     * @return Availability Manager.

     */

    inline CConnMonAvailabilityManager* AvailabilityManager()

        {

        return iAvailabilityManager;

        }

    /**

     * Gets bearers.

     * @return Bearers.

     */

    inline const RPointerArray<TConnMonBearer> Bearers()

        {

        return iBearers;

        }

    /**

     * Gets the bearer group manager.

     * @return Iaps availability manager.

     */

    inline CConnMonBearerGroupManager* BearerGroupManager()

        {

        return iBearerGroupManager;

        }

    /**

     * Gets a pointer to the iap module.

     * @return A pointer to the iap module.

     */

    inline CCellularDataUsageKeyUpdater* CellularDataUsageKeyUpdater() 

                     { return iCellularDataUsageKeyUpdater; }

    /**

     * Return the current dial-up PDP context override status.

     */

    inline TInt GetDialUpOverrideStatus() { return iDialUpOverrideStatus; }

    /**

     * Set the dial-up PDP context override feature status. Either activates or

     * deactivates it. Does nothing if the feature itself has not been enabled.

     */

    void SetDialUpOverrideStatus( TInt aStatus );

    /**

     * Signals that all internal PDP connections have closed through the

     * KDialUpConnection P&S-property.

     */

    void ConnectionsClosedForDialUpOverride();

public:

    /**

     * From CServer Creates a new session for a client.

     * @param aVersion Version information.

     * @return A pointer to the new session.

     */

    CSession2* NewSessionL(

            const TVersion& aVersion,

            const RMessage2& aMessage ) const;

private: // Data

    // Pointer to the Iap module

    CConnMonIAP* iIap;

    // Pointer to the event queue

    CEventQueue* iEventQueue;

    // The number of the sessions (=clients)

    TUint8 iSessionCount;

    // Pointer to the shutdown timer object

    CConnMonDelayedShutdown* iShutdown;

    // Object container index

    CObjectConIx* iContainerIndex;

    // Array of bearers

    RPointerArray<TConnMonBearer> iBearers;

    // CommsDat cache

    CConnMonCommsDatCache* iCommsDatCache;

    // Availability manager

    CConnMonAvailabilityManager* iAvailabilityManager;

    // Notifiers to listen for specific CommsDat tables

    CConnMonCommsDatNotifier* iIapTableNotifier;

    CConnMonCommsDatNotifier* iSnapTableNotifier;

    CConnMonCommsDatNotifier* iVirtualTableNotifier;

    CConnMonBearerGroupManager*   iBearerGroupManager;

    CCellularDataUsageKeyUpdater* iCellularDataUsageKeyUpdater;

    // Notifier to listen for changes in the the KDialUpConnection P&S-property.

    CConnMonDialUpOverrideNotifier* iDialUpOverrideNotifier;

    // Timeout timer for the dial-up PDP context override feature.

    CConnMonDialUpOverrideTimer* iDialUpOverrideTimer;

    // Current status of the dial-up PDP context override feature.

    TInt iDialUpOverrideStatus;

    };

/**

* CConnMonScheduler

* Active scheduler for the server thread.

*/

NONSHARABLE_CLASS( CConnMonScheduler ) : public CActiveScheduler

    {

public:

    static void ConstructL();

    ~CConnMonScheduler();

public:

    // TSignal is needed to allow a client thread to pass TRequestStatus

    // in a way that it survives the thread launch or process launch

    class TSignal

        {

    public:

        inline TSignal();

        inline TInt Set( const TDesC& aData );

        inline TSignal( TRequestStatus& aStatus );

        inline TPtrC Get() const;

    public:

        TRequestStatus* iStatus;

        TThreadId iId;

        };

    /**

     * Launches the server.

     * @return KErrNone if OK, otherwise a system wide error code.

     */

    static TInt LaunchFromClient();

    /**

     * Starts the active scheduler.

     * @return KErrNone if OK, otherwise a system wide error code.

     */

    IMPORT_C static TInt ThreadStart( TSignal& aSignal );

public:

    /**

     * From CActiveScheduler Handles leave situations.

     * @param aError System wide error code.

     */

    void Error( TInt aError ) const;

private: // Data

    CConnMonServer* iServer;

    };

/**

* CConnMonDelayedShutdown

* Shutdown timer that closes Connection Monitor server after a period.

*/

NONSHARABLE_CLASS( CConnMonDelayedShutdown ) : public CActive

    {

public:

    CConnMonDelayedShutdown( CConnMonServer* aServer );

    void ConstructL();

    ~CConnMonDelayedShutdown();

public:

    /**

     * Starts shutdown timer.

     * @return KErrNone if OK, otherwise a system wide error code.

     */

    void Start();

private:

    /**

     * From CActive Cancels the shutdown timer.

     */

    void DoCancel();

    /**

     * From CActive Shuts the server down.

     */

    void RunL();

private: // Data

    RTimer iTimer;

    CConnMonServer* iServer;

    };

/**

* CConnMonDialUpOverrideTimer

* A simple timer to ensure dial-up PDP context override feature can not stay

* active longer than the specied timeout value.

*/

NONSHARABLE_CLASS( CConnMonDialUpOverrideTimer ) : public CActive

    {

public:

    static CConnMonDialUpOverrideTimer* NewL( CConnMonServer* aServer );

    static CConnMonDialUpOverrideTimer* NewLC( CConnMonServer* aServer );

    virtual ~CConnMonDialUpOverrideTimer();

private:

    CConnMonDialUpOverrideTimer( CConnMonServer* aServer );

    void ConstructL();

public:

    void Start();

private:

    void DoCancel();

    void RunL();

private: // Data

    RTimer iTimer;

    CConnMonServer* iServer;

    };

// INLINES

inline CConnMonScheduler::TSignal::TSignal()

        :

        iStatus( KErrNone ),