wlan_bearer/wlanengine/wlan_common/wlanengine_common_3.1/src/core_frame_dot11_ie.cpp
changeset 0 c40eb8fe8501
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wlan_bearer/wlanengine/wlan_common/wlanengine_common_3.1/src/core_frame_dot11_ie.cpp	Tue Feb 02 02:03:13 2010 +0200
@@ -0,0 +1,191 @@
+/*
+* Copyright (c) 2005-2006 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "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:  Class parsing 802.11 IEs.
+*
+*/
+
+
+#include "genscaninfo.h"
+#include "core_frame_dot11_ie.h"
+#include "core_tools.h"
+#include "core_tools_parser.h"
+#include "am_debug.h"
+
+// ======== MEMBER FUNCTIONS ========
+
+const u8_t CORE_FRAME_DOT11_IE_LENGTH = 2;
+const u8_t CORE_FRAME_DOT11_IE_MIN_LENGTH_FIELD = 0;
+
+const u8_t CORE_FRAME_DOT11_IE_ELEMENT_INDEX = 0;
+const u8_t CORE_FRAME_DOT11_IE_LENGTH_INDEX = 1;
+
+// ---------------------------------------------------------------------------
+// ---------------------------------------------------------------------------
+//
+core_frame_dot11_ie_c* core_frame_dot11_ie_c::instance(
+    u16_t data_length,
+    const u8_t* data,
+    bool_t is_copied )
+    {
+    if ( data_length < CORE_FRAME_DOT11_IE_LENGTH )
+        {
+        DEBUG2( "core_frame_dot11_ie_c::instance() - IE data length is too short, actual length %u, minimum length %u",
+            data_length, CORE_FRAME_DOT11_IE_LENGTH );
+
+        return NULL;
+        }
+
+    u8_t* buffer = const_cast<u8_t*>( data );
+    u16_t buffer_length( 0 );
+
+    if ( is_copied )
+        {
+        DEBUG( "core_frame_dot11_ie_c::instance() - copying IE data" );
+        
+        buffer_length = data_length;
+        buffer = new u8_t[buffer_length];
+        
+        if ( !buffer )
+            {
+            DEBUG( "core_frame_dot11_ie_c::instance() - not able to allocate buffer for copying" );
+        
+            return NULL;            
+            }
+
+        core_tools_c::copy(
+            buffer,
+            data,
+            buffer_length );            
+        }
+
+    core_frame_dot11_ie_c* instance = new core_frame_dot11_ie_c(
+        data_length,
+        buffer,
+        buffer_length );
+    if ( !instance )
+        {
+        DEBUG( "core_frame_dot11_ie_c::instance() - unable to create an instance" );
+        
+        if ( is_copied )
+            {
+            delete[] buffer;
+            }
+
+        return NULL;
+        }
+    
+    if ( instance->length() + CORE_FRAME_DOT11_IE_HEADER_LENGTH > data_length )
+        {
+        DEBUG( "core_frame_dot11_ie_c::instance() - length field is too big" );
+        DEBUG2( "core_frame_dot11_ie_c::instance() - IE size is %u, IE length field is %u",
+            data_length, instance->length() );
+        delete instance;
+
+        return NULL;
+        }
+    
+    return instance;
+    }
+
+// ---------------------------------------------------------------------------
+// ---------------------------------------------------------------------------
+//       
+core_frame_dot11_ie_c::~core_frame_dot11_ie_c()
+    {
+    /** 
+     * If maximum IE length has been defined, we have allocated
+     * the frame buffer ourselves.
+     */    
+    if ( max_data_length_m )
+        {
+        delete[] data_m;
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// ---------------------------------------------------------------------------
+//
+u8_t core_frame_dot11_ie_c::element_id() const
+    {
+    return data_m[CORE_FRAME_DOT11_IE_ELEMENT_INDEX];
+    }
+
+// ---------------------------------------------------------------------------
+// ---------------------------------------------------------------------------
+//    
+u8_t core_frame_dot11_ie_c::length() const
+    {
+    return data_m[CORE_FRAME_DOT11_IE_LENGTH_INDEX];
+    }
+
+// ---------------------------------------------------------------------------
+// ---------------------------------------------------------------------------
+//
+u16_t core_frame_dot11_ie_c::data_length() const
+    {
+    return length() + CORE_FRAME_DOT11_IE_HEADER_LENGTH;
+    }
+
+// ---------------------------------------------------------------------------
+// ---------------------------------------------------------------------------
+//
+const u8_t* core_frame_dot11_ie_c::data() const
+    {
+    return data_m;
+    }
+
+// ---------------------------------------------------------------------------
+// ---------------------------------------------------------------------------
+//
+void core_frame_dot11_ie_c::generate(
+    u8_t element_id )
+    {
+    ASSERT( !data_length_m );
+    ASSERT( max_data_length_m );   
+
+    data_length_m = 0;
+
+    // Element ID
+    data_m[data_length_m++] = element_id;
+
+    // Length
+    data_m[data_length_m++] = CORE_FRAME_DOT11_IE_MIN_LENGTH_FIELD;    
+    }
+
+// ---------------------------------------------------------------------------
+// ---------------------------------------------------------------------------
+//
+void core_frame_dot11_ie_c::set_length(
+    u8_t length )
+    {
+    data_m[CORE_FRAME_DOT11_IE_LENGTH_INDEX] = length - CORE_FRAME_DOT11_IE_HEADER_LENGTH;
+    }
+
+// ---------------------------------------------------------------------------
+// ---------------------------------------------------------------------------
+//
+core_frame_dot11_ie_c::core_frame_dot11_ie_c(
+    u16_t data_length,
+    const u8_t* data,
+    u16_t max_data_length ) :
+    data_length_m( data_length ),
+    data_m( NULL ),
+    max_data_length_m( max_data_length )
+    {
+    /**
+     * The reason the const is discarded is that the same pointer
+     * is used when we have allocated the frame buffer ourselves.
+     */    
+    data_m = const_cast<u8_t*>( data );
+    }