wlan_bearer/wlanengine/wlan_common/wlanengine_common_3.1/src/core_frame_beacon.cpp
/*
* 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: Parser utility for beacon and probe response frames
*
*/
#include "core_frame_beacon.h"
#include "core_frame_dot11_ie.h"
#include "core_tools.h"
#include "am_debug.h"
const u16_t CORE_BEACON_LENGTH = 36;
const u16_t CORE_BEACON_TIMESTAMP_INDEX = 0;
const u16_t CORE_BEACON_BEACON_INTERVAL_INDEX = 8;
const u16_t CORE_BEACON_CAPABILITY_INDEX = 10;
const u16_t CORE_BEACON_IE_INDEX = 12;
// ======== MEMBER FUNCTIONS ========
// ---------------------------------------------------------------------------
// ---------------------------------------------------------------------------
//
core_frame_beacon_c* core_frame_beacon_c::instance(
const core_frame_dot11_c& frame,
bool_t is_copied )
{
DEBUG( "core_frame_beacon_c::instance()" );
if ( frame.data_length() < CORE_BEACON_LENGTH )
{
DEBUG( "core_frame_beacon_c::instance() - not a valid 802.11 frame, frame is too short" );
return NULL;
}
u8_t* buffer = const_cast<u8_t*>( frame.data() );
u16_t buffer_length( 0 );
if ( is_copied )
{
buffer_length = frame.data_length();
buffer = new u8_t[buffer_length];
if ( !buffer )
{
DEBUG( "core_frame_beacon_c::instance() - not able to allocate buffer for copying" );
return NULL;
}
core_tools_c::copy(
buffer,
frame.data(),
buffer_length );
}
core_frame_beacon_c* instance = new core_frame_beacon_c(
frame.data_length(),
buffer,
buffer_length );
if ( !instance )
{
DEBUG( "core_frame_beacon_c::instance() - unable to create an instance" );
if ( is_copied )
{
delete[] buffer;
}
return NULL;
}
if ( instance->type() != core_frame_dot11_c::core_dot11_type_beacon &&
instance->type() != core_frame_dot11_c::core_dot11_type_probe_resp )
{
DEBUG( "core_frame_beacon_c::instance() - not a valid beacon or probe response frame" );
delete instance;
return NULL;
}
return instance;
}
// ---------------------------------------------------------------------------
// ---------------------------------------------------------------------------
//
core_frame_beacon_c::~core_frame_beacon_c()
{
DEBUG( "core_frame_beacon_c::~core_frame_beacon_c()" );
}
// ---------------------------------------------------------------------------
// ---------------------------------------------------------------------------
//
u16_t core_frame_beacon_c::first_ie_offset() const
{
return CORE_BEACON_IE_INDEX;
}
// ---------------------------------------------------------------------------
// ---------------------------------------------------------------------------
//
core_tsf_value_s core_frame_beacon_c::timestamp() const
{
core_tsf_value_s timestamp;
core_tools_c::copy(
×tamp.tsf[0],
payload_data() + CORE_BEACON_TIMESTAMP_INDEX,
TSF_VALUE_LEN );
return timestamp;
}
// ---------------------------------------------------------------------------
// ---------------------------------------------------------------------------
//
u16_t core_frame_beacon_c::beacon_interval() const
{
return core_tools_c::get_u16( payload_data(),
CORE_BEACON_BEACON_INTERVAL_INDEX );
}
// ---------------------------------------------------------------------------
// ---------------------------------------------------------------------------
//
u16_t core_frame_beacon_c::capability() const
{
return core_tools_c::get_u16( payload_data(),
CORE_BEACON_CAPABILITY_INDEX );
}
// ---------------------------------------------------------------------------
// ---------------------------------------------------------------------------
//
core_frame_beacon_c::core_frame_beacon_c(
u16_t data_length,
const u8_t* data,
u16_t max_data_length ) :
core_frame_dot11_c( data_length, data, max_data_length )
{
DEBUG( "core_frame_beacon_c::core_frame_beacon_c()" );
}