bluetoothcommsprofiles/btpan/bnep/CSocketReader.cpp
changeset 0 29b1cd4cb562
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/bluetoothcommsprofiles/btpan/bnep/CSocketReader.cpp	Fri Jan 15 08:13:17 2010 +0200
@@ -0,0 +1,153 @@
+// Copyright (c) 2004-2009 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:
+//
+
+/**
+ @file
+ @internalComponent
+*/
+
+#include <bluetooth/logger.h>
+#include <es_mbuf.h>
+#include "CBnepLink.h"
+#include "CSocketReader.h"
+
+#ifdef __FLOG_ACTIVE
+_LIT8(KLogComponent, LOG_COMPONENT_PAN_BNEP);
+#endif
+
+// Class CSocketReader 
+
+CSocketReader::CSocketReader (RInternalSocket& aSocket, CBnepLink& aOwner)
+    : CActive(KSocketReaderPriority), iSocket(aSocket), iBnepLink(aOwner)
+    {
+    LOG_FUNC
+    CActiveScheduler::Add(this); 
+    }
+
+
+/**
+Cancels any pending reads.
+@internalComponent
+*/
+CSocketReader::~CSocketReader()
+    {
+    LOG_FUNC
+    iRecvMsg.Free();
+    Cancel();
+    }
+
+
+/**
+Does not create the socket reader's buffer, as this initialised 
+as a side effect of the RInternalSocket::Read(), 
+which has a hardcoded buffer size for Bluetooth - Maintainer BEWARE!!!!!.
+@internalComponent
+*/
+void CSocketReader::ConstructL ()
+    {
+    LOG_FUNC
+    }
+
+
+/**
+Cancel a read.
+@internalComponent
+*/
+void CSocketReader::DoCancel ()
+    {
+    LOG_FUNC
+    iSocket.CancelRead(); 
+    }
+
+    
+/**
+Create a socket reader.
+@internalComponent
+*/
+CSocketReader* CSocketReader::NewL (RInternalSocket& aSocket, CBnepLink& aOwner)
+    {
+    LOG_STATIC_FUNC
+    CSocketReader* self = new(ELeave) CSocketReader(aSocket, aOwner);
+    CleanupStack::PushL(self);
+    self->ConstructL();
+    CleanupStack::Pop(self);
+    return self; 
+    }
+
+
+/**
+Queue a read.
+@internalComponent
+*/
+void CSocketReader::Read ()
+    {
+    LOG_FUNC
+    LOG1(_L8("Reader 0x%08x -- queueing read"), this);
+    if (!IsActive())
+        {
+        // Ensure that the MBufChain that we are receiving into is available
+        // by free-ing any data currently in it.
+        iRecvMsg.Free();
+        
+        // As RMBufChain is essentially a pointer, the data returned must be consumed
+        // later either by re-assigning or by free-ing it.  This is a bit unlike a
+        // real RSocket, where the descriptor is simply overwritten.
+        iSocket.Read(iRecvMsg, iStatus);
+        SetActive(); 
+        }
+    else
+        {
+        LOG(_L8("Read queued but reader already active.  Discarding"));
+        }
+    }
+
+
+/**
+Read complete.
+Pass the received data up to the BNEP link, and signal disconnections.
+
+This method effectively triggers a long sequence of synchronous calls 
+into BNEP that culminate either in the completion of packet processing 
+or an asynchronous hiatus while waiting for the agent to respond to a 
+request.
+@internalComponent
+*/
+void CSocketReader::RunL ()
+    {
+    LOG_FUNC
+    
+    // Save iStatus value to allow us to queue a new read prior to finishing processing
+    // this one
+    TInt err = iStatus.Int();
+    LOG2(_L8("Length %d error %d"),iRecvMsg.Length(), err);
+    
+    if (iRecvMsg.Length())	// send any data up
+        {
+        // This is what kicks off the long processing 
+        // sequence that may culminate in a write.
+        // Note that this call may cause calls back down to CSocketReader
+        iBnepLink.ReadComplete(iRecvMsg);
+        LOG1(_L8("After ReadComplete Length %d"),iRecvMsg.Length());
+        }
+    
+    if (err != KErrNone)	// if the connection has failed for some reason
+        {
+        LOG(_L8("Attempting a remote device disconnect"));
+        
+        // Cancel any new read queued
+        Cancel();
+        iBnepLink.RemoteDeviceDisconnect(err); // then notify the upper layer of the disconnect
+        }
+    }