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#define __NET_IP_HEADER_H__
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#define __NET_IP_HEADER_H__
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#include <byteorder.h>
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#include <byteorder.h>
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#include <sys/types.h>
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#include <sys/types.h>
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/** Returns the actual IP header length.
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/** Returns the actual IP header length in bytes.
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 *  @param header The IP packet header. Input parameter.
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 *  @param[in] header The IP packet header.
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 */
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 */
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#define IP_HEADER_LENGTH( header )      (( header )->header_length * 4u )
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#define IP_HEADER_LENGTH( header )      (( header )->header_length * 4u )
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/** Returns the actual IP header length.
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/** Returns the IP header length.
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 *  @param header The IP packet header. Input parameter.
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 *  @param[in] length The IP header length in bytes.
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 */
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 */
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#define IP_COMPUTE_HEADER_LENGTH( length )      (( uint8_t ) (( length ) / 4u ))
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#define IP_COMPUTE_HEADER_LENGTH( length )      (( uint8_t ) (( length ) / 4u ))
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/** Returns the actual IP packet total length.
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/** Returns the actual IP packet total length.
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 *  @param header The IP packet header. Input parameter.
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 *  @param[in] header The IP packet header.
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 */
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 */
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#define IP_TOTAL_LENGTH( header )       ntohs(( header )->total_length )
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#define IP_TOTAL_LENGTH( header )       ntohs(( header )->total_length )
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/** Returns the actual IP packet data length.
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/** Returns the actual IP packet data length.
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 *  @param header The IP packet header. Input parameter.
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 *  @param[in] header The IP packet header.
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 */
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 */
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#define IP_HEADER_DATA_LENGTH( header ) ( IP_TOTAL_LENGTH( header ) - IP_HEADER_LENGTH( header ))
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#define IP_HEADER_DATA_LENGTH( header ) ( IP_TOTAL_LENGTH( header ) - IP_HEADER_LENGTH( header ))
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/** Returns the IP packet header checksum.
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/** Returns the IP packet header checksum.
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 *  @param header The IP packet header. Input parameter.
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 *  @param[in] header The IP packet header.
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 */
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 */
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#define IP_HEADER_CHECKSUM( header )    ( htons( ip_checksum(( uint8_t * )( header ), IP_HEADER_LENGTH( header ))))
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#define IP_HEADER_CHECKSUM( header )    ( htons( ip_checksum(( uint8_t * )( header ), IP_HEADER_LENGTH( header ))))
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/** Returns the fragment offest.
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/** Returns the fragment offest.
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 *  @param header The IP packet header. Input parameter.
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 *  @param[in] header The IP packet header.
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 */
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 */
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#define IP_FRAGMENT_OFFSET( header ) (((( header )->fragment_offset_high << 8 ) + ( header )->fragment_offset_low ) * 8u )
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#define IP_FRAGMENT_OFFSET( header ) (((( header )->fragment_offset_high << 8 ) + ( header )->fragment_offset_low ) * 8u )
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/** Returns the fragment offest high bits.
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/** Returns the fragment offest high bits.
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 *  @param length The prefixed data total length. Input parameter.
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 *  @param[in] length The prefixed data total length.
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 */
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 */
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#define IP_COMPUTE_FRAGMENT_OFFSET_HIGH( length ) (((( length ) / 8u ) & 0x1F00 ) >> 8 )
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#define IP_COMPUTE_FRAGMENT_OFFSET_HIGH( length ) (((( length ) / 8u ) & 0x1F00 ) >> 8 )
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/** Returns the fragment offest low bits.
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/** Returns the fragment offest low bits.
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 *  @param length The prefixed data total length. Input parameter.
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 *  @param[in] length The prefixed data total length.
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 */
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 */
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#define IP_COMPUTE_FRAGMENT_OFFSET_LOW( length ) ((( length ) / 8u ) & 0xFF )
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#define IP_COMPUTE_FRAGMENT_OFFSET_LOW( length ) ((( length ) / 8u ) & 0xFF )
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/** Type definition of the internet header.
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/** Type definition of the internet header.
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 *  @see ip_header
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 *  @see ip_header