IPv4.h

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// Product  OpenNet


// TEST COVERAGE  2019-05-10  KMS - Martin Dubois, ing.

#pragma once

// Includes

// ===== Includes ===========================================================
#include <OpenNetK/ByteOrder.h>

// Constants

#define IPv4_ETHERNET_TYPE_nh (0x0008)

#ifndef _OPEN_NET_NO_FUNCTION_

// Functions

OPEN_NET_GLOBAL unsigned short * IPv4_Destination(OPEN_NET_GLOBAL unsigned char * aData)
{
    return ((OPEN_NET_GLOBAL unsigned short *)(aData + 16));
}

unsigned int IPv4_HeaderSize(OPEN_NET_GLOBAL unsigned char * aData)
{
    return ( (aData[0] & 0x0f) * 4 );
}

unsigned char IPv4_Protocol(OPEN_NET_GLOBAL unsigned char * aData)
{
    return aData[9];
}

OPEN_NET_GLOBAL unsigned short * IPv4_Source(OPEN_NET_GLOBAL unsigned char * aData)
{
    return ((OPEN_NET_GLOBAL unsigned short *)(aData + 12));
}

// --------------------------------------------------------------------------

OPEN_NET_GLOBAL unsigned char * IPv4_Data(OPEN_NET_GLOBAL unsigned char * aData)
{
    return (aData + IPv4_HeaderSize(aData));
}

unsigned int IPv4_DataSize(OPEN_NET_GLOBAL unsigned char * aData)
{
    return (ByteOrder_Swap16(*((OPEN_NET_GLOBAL unsigned short *)(aData + 2))) - IPv4_HeaderSize(aData));
}

#endif // ! _OPEN_NET_NO_FUNCTION_