hotspotfw/hsserver/src/hssscanlist.cpp
changeset 0 56b72877c1cb
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspotfw/hsserver/src/hssscanlist.cpp	Thu Dec 17 09:20:28 2009 +0200
@@ -0,0 +1,131 @@
+/*
+* Copyright (c) 2002-2006 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:   Implementation of the ScanList class.
+*
+*/
+
+
+
+#include "hssscanlist.h"
+#include "hssscanoffsets.h"
+
+// ================= MEMBER FUNCTIONS =======================
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+HssScanList::HssScanList():count_m( 0 ), size_m( 0 )
+{
+}
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TUint32 HssScanList::Append( TUint32 size, const HssScanFrame* data_pointer )
+{
+
+    if( AddPadding( size  ) >= ( HSS_SCAN_LIST_DATA_SIZE - size_m ) )
+    {
+    
+        return HSS_APPEND_FAILED_NO_MEMORY;
+    }
+
+    TUint8* dst = data_m + size_m;
+    const TUint8* src = data_pointer;
+    const TUint8* end = data_pointer + size;
+
+    for ( ; src < end; ++dst, ++src )
+    {
+        *dst = *src;
+    }
+
+    // The checking has to been done after copying it to the buffer
+    // due it relies the buffers limits.
+    if ( CheckData( data_m + size_m ) )
+    { // Add data only if it is valid.
+        size_m += AddPadding( size );
+        ++count_m;
+    }
+    
+    return size_m;
+}
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TUint32 HssScanList::Append( TUint32 size )
+{
+
+    if ( CheckData( data_m + size_m ) )
+    { // Add data only if it is valid.
+        size_m += AddPadding( size );
+        ++count_m;
+    }
+
+    return size_m;
+}
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+
+TBool HssScanList::CheckData( HssScanFrame* data ) const
+{
+    // Check that the data is at the range.
+    if ( data < data_m || 
+         data > data_m + size_m || 
+         size_m + sizeof( TUint16 ) > HSS_SCAN_LIST_DATA_SIZE )
+    {
+        return false;
+    }
+
+    // Calculate the length of the data.
+    TUint16 size = static_cast<TUint16>( *( reinterpret_cast<const TUint32*>( data + LENGTH_OFFSET ) ) + CNTRL_HEADER_LEN);
+
+    // Check that the whole data fits to the buffer.
+    if ( data + size > data_m + HSS_SCAN_LIST_DATA_SIZE )
+    {
+        return false;
+    }
+    
+    const TUint8* currentIE;
+
+    // Search mandatory IEs.
+    for ( TUint i = 0; i < HSS_MANDATORY_IE_LIST_SIZE; ++i )
+    {
+        // Go through all IEs.
+        for ( currentIE = data + BODY_OFFSET;
+              ; // No condition here -- it is in the loop.
+              currentIE += *( currentIE + 1 ) + 2 )
+        {
+            if ( currentIE < data + size )
+            { // Still searching...
+                if ( *currentIE == HSS_MANDATORY_IE_LIST[i] )
+                { // We have a match! Lets find out the next one.
+                    break;
+                }
+            }
+            else
+            { // The IE was not found.
+                return false;
+            }
+        }
+    }
+    // Data is ok.
+    return true;
+}