Ad Hoc Mode Access Point connection

[primal]

Hi All,

I am trying to connect two mobile phones through an ad hoc mode access point.

Is it possible to connect two mobile phones directly through an ad hoc mode access point ?

How can I assign an IP address to the phones ?
So that I can directly open a socket connection to that IP ...

Can anyone help me in this matter ...

Regards,
Primal

[wizard_hu_]

Check the very first reply in your original post http://discussion.forum.nokia.com/fo...d.php?t=125171 : I have answered your question in less than 3 hours. It happened exactly 3 weeks ago, but you have not tried it, instead failed with some other API. Your choice.

[primal]

Sorry for that Wizard_hu, I failed in creating an access point in ad hoc mode through the code and then had to ask for help.

Now I was able to create two ad hoc mode access points in the two phones with the same Network name and access point name using the code. In the one phone I created socket listener with the IP address "KInetAddrAny" and the port "1500".

In the other phone I tried to connect to an IP address "192.248.16.30" and the port "1500" through a socket connection connected to the created access point. But it was not successful. I could not pass any message.

When I created the access point and connect to it with in the same phone, I could see that access point in the other phone as well. But still I could not open a socket connection to the other phone. What could be the reason ?

Regards,
Primal

[wizard_hu_]

On the server device you should RConnection::Start the Ad-hoc access point from code (and use the same RConnection object with RSocket::Open for Accept-or socket).

[primal]

Yes, I specifically created a connection to the newly created access point (using the access point ID ) through the code and I used that connection in starting the socket server and in turn to accept the socket. But it didn't work. Do I have to bind a specific IP for that ? What could be the reason for not accepting the client connection from the server side?

Regards,
Primal

[primal]

Hi All,

Is there any possibility to assign an IP address to an ad hoc mode access point through the code ?

Regards,
Primal

[primal]

Hi,

I created two ad hoc mode access points in two phones having the same SSID, Channel N0 and same Gateway and Subnet mask. Then I created a connection to those created APs in respective phones.

Finally using that connection, in one phone I tried to listen to a port through a socket (socket.accept), having its IP address bind to it. In the other phone, I tried to connect to the other phone using its IP address through the socket.connect.

But still the connection is not establishing between two phones. What could be the reason ?

Please please help me !!!

Regards,
Primal

[wizard_hu_]

I am not sure, you may try a simple SetLocalPort on the server side instead of Bind.

[primal]

Hi,

I tried that one too but failed. Here I am sending my server and client code. What I am trying is to create two ad hoc mode access points in two phones and then try to connect that two phones using a socket connection.

Following the server code:

   
	
	CCommsDatabase* db = CCommsDatabase::NewL();
	CleanupStack::PushL(db);
	TInt err = db->BeginTransaction();
	
	// Create a wlan AP and fill its mandatory fields.
	CApAccessPointItem* wlanAp = CApAccessPointItem::NewLC();
	CApAccessPointItem* wlanNewItem = CApAccessPointItem::NewLC();
	
	wlanAp->SetNamesL(_L("MySSid"));
	wlanAp->SetBearerTypeL(EApBearerTypeWLAN);
	wlanAp->WriteTextL(EApWlanNetworkName, _L("MySSid"));  // Give corrct Data as per the router configuration  //L!nkSys@MdpNok!a
	
	//Lan network mode should be 1 for infrastructure, 0 for adhoc
	wlanAp->WriteUint(EApWlanNetworkMode,0);
	
	wlanAp->WriteUint(EApWlanChannelId ,3);	
	
	// Setting up advanced settings for IP addressing
	wlanAp->WriteTextL(EApWlanIpAddr ,_L("192.248.16.30"));	
	wlanAp->WriteTextL(EApWlanIpNetMask ,_L("255.255.255.00"));
	wlanAp->WriteTextL(EApWlanIpGateway ,_L("192.248.16.30"));
	
	TBool val =ETrue;
	TUint32 newalanid;
	
	CApDataHandler* handler = CApDataHandler::NewLC(*db);
	TUint32 apid;
	apid = handler->CreateFromDataL(*wlanAp);
	handler->UpdateAccessPointDataL(*wlanAp,val);
	handler->AccessPointDataL(apid,*wlanNewItem); 
	
	CApUtils *aputil = CApUtils::NewLC(*db);
	TUint32 wapuid = wlanAp->WapUid();
	TInt Iap = aputil->IapIdFromWapIdL(wapuid);
	
	wlanNewItem->ReadUint( EApIapServiceId, newalanid );
	TBuf<50>	ibuff;
	wlanNewItem->ReadTextL( EApWlanNetworkName, ibuff ); 
	TUint32 newAPId = wlanNewItem->WapUid();
	
	CCommsDbTableView* wLanServiceTable = db->OpenViewMatchingUintLC( TPtrC( WLAN_SERVICE ), TPtrC( WLAN_SERVICE_ID ), newalanid );
	errorCode = wLanServiceTable->GotoFirstRecord();
	
	if ( errorCode == KErrNone )
	{
		wLanServiceTable->UpdateRecord();
	}
	else
	{
		TUint32 dummyUid( 10 );	//KUidNone
		User::LeaveIfError( wLanServiceTable->InsertRecord( dummyUid ) );
		wLanServiceTable->WriteUintL( TPtrC( WLAN_SERVICE_ID ), apid );
	}
	
	wLanServiceTable->PutRecordChanges();
	err = db->CommitTransaction();
	CleanupStack::PopAndDestroy(5);
	
	
	 // Create an RConnection using a defined IAP
	TInt error;
	error = server.Connect(KESockDefaultMessageSlots);
	error = connection.Open(server, KConnectionTypeDefault);
	TCommDbConnPref prefs;
	prefs.SetDialogPreference(ECommDbDialogPrefDoNotPrompt);
	prefs.SetDirection(ECommDbConnectionDirectionUnknown);
	prefs.SetIapId(newAPId);
	error = connection.Start(prefs);
				
	// Creating the listenning socket
	err = iListen.Open(server, KAfInet, KSockStream, KProtocolInetTcp, connection);
	User::LeaveIfError(err);
	
	// The second (blank) socket is required to build the connection & transfer data.
	err = iSocket.Open(server);
	User::LeaveIfError(err);
	
	//Setting up the remote IP address
	_LIT( KIPAddress, "192.248.16.30");
	TInetAddr addr;
	addr.Input( KIPAddress );
	TUint32 aAddr;
	aAddr =  addr.Address();
	
	// Binding the local infror to the listenner
	TInt port  = 1500;
	/*TInetAddr anyAddrOnPort(aAddr, port);
	iListen.Bind(anyAddrOnPort);	*/
		
	iListen.SetLocalPort(port);
	
    // Listen for incoming connections and accept an incoming connection.
    iListen.Listen(5);
    
    // On connection, subsequent data transfer will occur using the socket iSocket
    iListen.Accept(iSocket, iStatus);
    SetActive();

following is the client code

    
	
	CCommsDatabase* db = CCommsDatabase::NewL();
	CleanupStack::PushL(db);
	TInt err = db->BeginTransaction();
	
	// Create a wlan AP and fill its mandatory fields.
	CApAccessPointItem* wlanAp = CApAccessPointItem::NewLC();
	CApAccessPointItem* wlanNewItem=CApAccessPointItem::NewLC();
	
	wlanAp->SetNamesL(_L("MySSid"));
	wlanAp->SetBearerTypeL(EApBearerTypeWLAN);
	wlanAp->WriteTextL(EApWlanNetworkName, _L("MySSid"));  // Give corrct Data as per the router configuration  //L!nkSys@MdpNok!a
	
	//Lan network mode should be 1 for infrastructure, 0 for adhoc
	wlanAp->WriteUint(EApWlanNetworkMode,0);
	
	wlanAp->WriteUint(EApWlanChannelId ,3);	
	
	// Setting up advanced settings for IP addressing
	wlanAp->WriteTextL(EApWlanIpAddr ,_L("192.248.16.31"));	
	wlanAp->WriteTextL(EApWlanIpNetMask ,_L("255.255.255.00"));
	wlanAp->WriteTextL(EApWlanIpGateway ,_L("192.248.16.30"));
	//wlanAp->WriteBool(EApIpv4Settings, ETrue);
	
	
	TBool val =ETrue;
	TUint32 newalanid;
	
	CApDataHandler* handler = CApDataHandler::NewLC(*db);
	TUint32 apid;
	apid = handler->CreateFromDataL(*wlanAp);
	handler->UpdateAccessPointDataL(*wlanAp,val);
	handler->AccessPointDataL(apid,*wlanNewItem); 
	
	CApUtils *aputil = CApUtils::NewLC(*db);
	TUint32 wapuid = wlanAp->WapUid();
	TInt Iap = aputil->IapIdFromWapIdL(wapuid);
	TUint32 newAPId = wlanNewItem->WapUid();
	
	wlanNewItem->ReadUint( EApIapServiceId, newalanid );
	TBuf<50>	ibuff;
	wlanNewItem->ReadTextL( EApWlanNetworkName, ibuff ); 
	
	CCommsDbTableView* wLanServiceTable = db->OpenViewMatchingUintLC( TPtrC( WLAN_SERVICE ), TPtrC( WLAN_SERVICE_ID ), newalanid );
	errorCode = wLanServiceTable->GotoFirstRecord();
	
	if ( errorCode == KErrNone )
	{
		wLanServiceTable->UpdateRecord();
	}
	else
	{
		TUint32 dummyUid( 10 );	//KUidNone
		User::LeaveIfError( wLanServiceTable->InsertRecord( dummyUid ) );
		wLanServiceTable->WriteUintL( TPtrC( WLAN_SERVICE_ID ), apid );
	}
	
	wLanServiceTable->PutRecordChanges();
	err = db->CommitTransaction();
	CleanupStack::PopAndDestroy(5);
	
	 // Create an RConnection using a defined IAP
	TInt error;
	error = server.Connect(KESockDefaultMessageSlots);
	error = connection.Open(server, KConnectionTypeDefault);
	TCommDbConnPref prefs;
	prefs.SetDialogPreference(ECommDbDialogPrefDoNotPrompt);
	prefs.SetDirection(ECommDbConnectionDirectionUnknown);
	prefs.SetIapId(newAPId);
	error = connection.Start(prefs);
				
	// Creating the listenning socket
	err = iListen.Open(server, KAfInet, KSockStream, KProtocolInetTcp, connection);
	User::LeaveIfError(err);	
	
	//Setting up the remote IP address
	_LIT( KIPAddress, "192.248.16.30");
	TInetAddr addr;
	addr.Input( KIPAddress );
	TUint32 aAddr;
	aAddr =  addr.Address();
	
	// Binding the local infror to the listenner
	TInetAddr anyAddrOnPort(aAddr, 1500);
	iListen.Connect(anyAddrOnPort, iStatus);
	
    SetActive();

I have been trying this code for weeks. Can you all please sort it out for me ??

Regards,
Primal

[primal]

Hi All,

Do i need to have capability "NetworkServices" to send and receive data using a socket connection ??

Plz help me, I am stuck here for weeks.

Regards,
Primal

[wizard_hu_]

Do i need to have capability "NetworkServices" to send and receive data using a socket connection ??

Of course you need.

Plz help me, I am stuck here for weeks.

If you remove/comment/#ifdef the WLAN-related parts of your code, pure networking does work in the emulator and such requirements are quickly appear in epocwind.out.
By the way, I am almost sure that you need capabilities to use CApUtils (or what the name of that API is), make sure that you have added them.
Handling error-codes also reveals such problems: you get KErrPermissionDenied (-46 as I remember) when you are trying to do things without the necessary capabilities.

[primal]

Thanx Wizard_hu,

Yes, I had to add the "WriteDeviceData" capability inorder to add a new ad hoc access point through the code. What I am asking is, do I need aditional capabilities as well for a socket connection over ad hoc wireless connection ?

Anyway I will try your suggestion to know whether I need any additional capabilities ...

Regards,
pirmal

[wizard_hu_]

You can and should experiment of course, however I am sure that NetworkServices is mandatory for anything that uses an IAP (even implicitly with RSocket::Connect to a non-local address).

[primal]

Hey Thanx a lot wizard_hu,

Its finally working. i think the main reason for not working earlier, is that I have not added the "NetworkService" capability. Thanx again for your help ....

Regards,
primal