How to Disconnect RConnection

[ashfaq.ghori]

Hi,

I am using a RConnection to open a WLan connection. Below is the code


Header file

class CConnectionMaker : public CActive
	{
public:
	static CConnectionMaker* NewL();
	static CConnectionMaker* NewLC();
	~CConnectionMaker();

public:
	void ConnectL(TUint32 aIapId);
	void Disconnect();

protected:
	void DoCancel();
	void RunL();
	TInt RunError(TInt aError);
	static TInt TimeoutCallback(TAny* aAny);

private:
	CConnectionMaker();
	void ConstructL();

private:
	RSocketServ iSocketServer;
	RConnection iConnection;
	CPeriodic* iPeriodic;

public:
	};

Source file

CConnectionMaker * CConnectionMaker::NewL()
	{
	CConnectionMaker* self = NewLC ();
	CleanupStack::Pop (self);
	return self;
	}

CConnectionMaker* CConnectionMaker::NewLC()
	{
	CConnectionMaker* self = new (ELeave) CConnectionMaker();
	CleanupStack::PushL (self);
	self->ConstructL ();
	return self;
	}

CConnectionMaker::~CConnectionMaker()
	{
	Deque();
	delete iPeriodic;
	iConnection.Close ();
	iSocketServer.Close ();
	}

CConnectionMaker::CConnectionMaker() :
	CActive(CActive::EPriorityStandard)
	{
	}

void CConnectionMaker::ConstructL()
	{
	User :: LeaveIfError (iSocketServer.Connect (KESockDefaultMessageSlots));

	/** create the timeout timer */
	iPeriodic = CPeriodic::NewL (EPriorityStandard);

	/** Add to active scheduler */
	CActiveScheduler::Add (this);
	}

void CConnectionMaker::DoCancel()
	{
	iPeriodic->Cancel ();
	iConnection.Close();
	}

void CConnectionMaker::RunL()
	{
	User::LeaveIfError(iStatus.Int());

	iPeriodic->Cancel ();
	// some notification code
	........
	}

TInt CConnectionMaker::RunError(TInt aError)
	{
	iPeriodic->Cancel ();
	// some notification code
	........
	return KErrNone;	
	}

void CConnectionMaker::ConnectL(TUint32 aIapId)
	{
	Cancel ();
	iConnection.Close ();

	User :: LeaveIfError (iConnection.Open (iSocketServer));

	TCommDbConnPref prefs;
	prefs.SetDialogPreference (ECommDbDialogPrefDoNotPrompt);
	prefs.SetDirection (ECommDbConnectionDirectionOutgoing);
	prefs.SetIapId (aIapId);

	iConnection.Start (prefs, iStatus);
	SetActive ();
	iPeriodic->Start (250000000, 250000000, TCallBack (CConnectionMaker::TimeoutCallback, this));
	}

void CConnectionMaker::Disconnect()
	{
	iConnection.Close();
	}

TInt CConnectionMaker::TimeoutCallback(TAny* aAny)
	{
	CConnectionMaker* parent = static_cast<CConnectionMaker*>(aAny);
	parent->iConnection.Stop();
	return KErrNone;
	}

Now when I am trying to connect to a access point for the first time I am able to connect to it.
When I forcefully disconnect it with "Conn. Mgr." it get disconnected (the icon vanish). When I try to connect it second time it cannot start connection and my Timer expires. This connection is in midway as my RunL is not called for very long time. So I call iConnection->Stop(); My RunL is called after but this Connection is not closed (even if i closed my application). I still see icon and connecting status in "Conn. mgr.".

I have to explectly delete it with "Conn. mgr."

Can some one help me in figuring out the problem

Also how "conn. mgr." achive this functionality of disconnection. I could even use that to release the connection.

Regards
Ashfaq Ghori

[wizard_hu_]

Note that RConnection::Stop needs NetworkControl (NetworkServices is not enough) capability. Have you tried Close-ing and re-Open-ing the RConnection before a new Start?

[paipeng]

with RConnection::Stop(), I can only disconnect this connection created by this RConnection.

If there are any other applications running with the connection(WLan), then the RConnection::Stop() doesn't work any more.


Is that mean, I nead the NetworkControl to do this?



Thanks

Pai

[wizard_hu_]

with RConnection::Stop(), I can only disconnect this connection created by this RConnection.

No. Feel free to check it in the SDK Help.

If there are any other applications running with the connection(WLan), then the RConnection::Stop() doesn't work any more.

Is that mean, I nead the NetworkControl to do this?

RConnection::Stop simply returns KErrPermissionDenied if you use it without having NetworkControl. However if you invoke RConnection::Close - indicating that your application will not like to use the connection any more -, and no other applications use the same (for example WLAN) interface, the connection will usually shut down.
Generally you do not need RConnection::Stop, since the connection will behave as specified by the user (in the Settings application), thus usually close when unused.

[paipeng]

Yes wizard_hu, I get 'KErrPermissionDenied -46' by RConnection::Stop.
(Can I do this disconnection when I have the 'NetworkControl' capability, when other applications use this interface, like WLan?)

I use this 'Stop' function, only want to switch the wlan-connections between access points automatically/programmatically.

is this kind of switching(like roaming/handover) possible with S60 3rd SDK?


Thanks again.

Pai

[wizard_hu_]

(Can I do this disconnection when I have the 'NetworkControl' capability, when other applications use this interface, like WLan?)

Feel free to check it in the SDK Help.

And here come at least 10 characters, of course.

[paipeng]

And here come at least 10 characters, of course.

Thanks wizard hu for your attention and answer.

Yes, there are many questions on the forum which can be answered by self checking the docs.

Only if the docs is written well.

After checking the SDK of 9.1, 9.2 and 9.3(beta). and found another topic about this poblem, I must say, i can't find the answer in docs of SDKs.

http://discussion.forum.nokia.com/fo...ad.php?t=85091

I'd better check/search in the forum first, before I ask again...


finally, I found it in sdk, with help of

https://developer.symbian.com/forum/...7105&tstart=45

[wizard_hu_]

I do not have every possible SDK-s installed, but in 3rd MR:

Stop()
IMPORT_C TInt Stop();
Description
Stops the entire connection by disconnecting the underlying network interface immediately, regardless of whether other clients are using it or not.

Applications using the connection will be sent the socket error code KErrCancel. The application generally responds with clean up operations and pop-up boxes alerting the user to the termination of the application.

Return value
TInt KErrNone if successful, otherwise another of the system wide error codes.

Note that the first relevant hit for RConnection from Google also says

Disconnect the underlying interface immediately (regardless of whether other clients are using it or not).

[paipeng]

Of course right, I read it too, only one thing, when it works (without -46 or anything else).

Now the problem is, it doesn't work. And I have found the needed capabilitiy name not directly on that SDK page, but from you and the links.