| 67,10 → 67,20 |
|---|
| #define IP_HEADER_CHECKSUM( header ) ( htons( ip_checksum(( uint8_t * )( header ), IP_HEADER_LENGTH( header )))) |
| |
| /** Returns the fragment offest. |
| * @param header The IP packet header. Input parameter. |
| */ |
| #define IP_FRAGMENT_OFFSET( header ) (((( header )->fragment_offset_high << 8 ) + ( header )->fragment_offset_low ) * 8u ) |
| |
| /** Returns the fragment offest high bits. |
| * @param length The prefixed data total length. Input parameter. |
| */ |
| #define IP_COMPUTE_FRAGMENT_OFFSET( length ) (( length ) / 8 ) |
| #define IP_COMPUTE_FRAGMENT_OFFSET_HIGH( length ) (((( length ) / 8u ) & 0x1F00 ) >> 8 ) |
| |
| /** Returns the fragment offest low bits. |
| * @param length The prefixed data total length. Input parameter. |
| */ |
| #define IP_COMPUTE_FRAGMENT_OFFSET_LOW( length ) ((( length ) / 8u ) & 0xFF ) |
| |
| /** Type definition of the internet header. |
| * @see ip_header |
| */ |
| 117,20 → 127,25 |
|---|
| uint16_t identification; |
| #ifdef ARCH_IS_BIG_ENDIAN |
| /** Various control flags. |
| * @see |
| */ |
| uint16_t flags:3; |
| uint8_t flags:3; |
| /** This field indicates where in the datagram this fragment belongs. |
| * High bits. |
| */ |
| uint16_t fragment_offset:3; |
| uint8_t fragment_offset_high:5; |
| #else |
| /** This field indicates where in the datagram this fragment belongs. |
| * High bits. |
| */ |
| uint16_t fragment_offset:13; |
| uint8_t fragment_offset_high:5; |
| /** Various control flags. |
| */ |
| uint16_t flags:3; |
| uint8_t flags:3; |
| #endif |
| /** This field indicates where in the datagram this fragment belongs. |
| * Low bits. |
| */ |
| uint8_t fragment_offset_low; |
| /** This field indicates the maximum time the datagram is allowed to remain in the internet system. |
| * If this field contains the value zero, then the datagram must be destroyed. |
| * This field is modified in internet header processing. |