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/** Ethernet header start of frame value.
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/** Ethernet header start of frame value.
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 */
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 */
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#define ETH_SFD         0xD5
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#define ETH_SFD         0xD5
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/** Type definition of the Ethernet header with all the extensions.
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/** IEEE 802.2 unordered information control field.
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 *  @see eth_header_ex
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 */
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 */
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typedef struct eth_header_ex    eth_header_ex_t;
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#define IEEE_8023_2_UI  0x03
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/** Type definition of the Ethernet header with all the extensions pointer.
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/** Type definition of the Ethernet header IEEE 802.3 + 802.2 + SNAP extensions.
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 *  @see eth_header
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 *  @see eth_header_snap
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 */
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 */
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typedef eth_header_ex_t *       eth_header_ex_ref;
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typedef struct eth_header_snap  eth_header_snap_t;
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/** Type definition of the Ethernet header IEEE 802.3 + 802.2 + SNAP extensions pointer.
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 *  @see eth_header_snap
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 */
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typedef eth_header_snap_t *     eth_header_snap_ref;
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/** Type definition of the Ethernet header LSAP extension.
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/** Type definition of the Ethernet header IEEE 802.3 + 802.2 + SNAP extensions.
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 *  @see eth_header_lsap
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 *  @see eth_header_lsap
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 */
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 */
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typedef struct eth_header_lsap  eth_header_lsap_t;
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typedef struct eth_header_lsap  eth_header_lsap_t;
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/** Type definition of the Ethernet header LSAP extension pointer.
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/** Type definition of the Ethernet header IEEE 802.3 + 802.2 extension pointer.
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 *  @see eth_header_lsap
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 *  @see eth_header_lsap
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 */
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 */
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typedef eth_header_lsap_t *     eth_header_lsap_ref;
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typedef eth_header_lsap_t *     eth_header_lsap_ref;
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/** Type definition of the Ethernet header LSAP extension.
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 *  @see eth_ieee_lsap
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 */
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typedef struct eth_ieee_lsap    eth_ieee_lsap_t;
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/** Type definition of the Ethernet header LSAP extension pointer.
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 *  @see eth_ieee_lsap
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 */
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typedef eth_ieee_lsap_t *       eth_ieee_lsap_ref;
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/** Type definition of the Ethernet header SNAP extension.
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/** Type definition of the Ethernet header SNAP extension.
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 *  @see eth_header_snap
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 *  @see eth_snap
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 */
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 */
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typedef struct eth_header_snap  eth_header_snap_t;
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typedef struct eth_snap     eth_snap_t;
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/** Type definition of the Ethernet header SNAP extension pointer.
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/** Type definition of the Ethernet header SNAP extension pointer.
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 *  @see eth_header_snap
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 *  @see eth_snap
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 */
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 */
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typedef eth_header_snap_t *     eth_header_snap_ref;
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typedef eth_snap_t *        eth_snap_ref;
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/** Type definition of the Ethernet header preamble.
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/** Type definition of the Ethernet header preamble.
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 *  @see preamble
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 *  @see preamble
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 */
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 */
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typedef struct eth_preamble eth_preamble_t;
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typedef struct eth_preamble eth_preamble_t;
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/** Type definition of the Ethernet header preamble pointer.
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/** Type definition of the Ethernet header preamble pointer.
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 *  @see eth_preamble
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 *  @see eth_preamble
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 */
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 */
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typedef eth_preamble_t *        eth_preamble_ref;
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typedef eth_preamble_t *    eth_preamble_ref;
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/** Type definition of the Ethernet header.
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/** Type definition of the Ethernet header.
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 *  @see eth_header
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 *  @see eth_header
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 */
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 */
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typedef struct eth_header   eth_header_t;
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typedef struct eth_header   eth_header_t;
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 */
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 */
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typedef eth_header_t *      eth_header_ref;
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typedef eth_header_t *      eth_header_ref;
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/** Ethernet header Link Service Access Point extension.
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/** Ethernet header Link Service Access Point extension.
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 */
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 */
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struct eth_header_lsap{
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struct eth_ieee_lsap{
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    /** Destination Service Access Point identifier.
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    /** Destination Service Access Point identifier.
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     *  The possible values are assigned by an IEEE committee.
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     *  The possible values are assigned by an IEEE committee.
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     */
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     */
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    uint8_t     dsap;
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    uint8_t     dsap;
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    /** Source Service Access Point identifier.
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    /** Source Service Access Point identifier.
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    uint8_t     ctrl;
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    uint8_t     ctrl;
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} __attribute__ ((packed));
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} __attribute__ ((packed));
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/** Ethernet header SNAP extension.
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/** Ethernet header SNAP extension.
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 */
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 */
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struct eth_header_snap{
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struct eth_snap{
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    /** Protocol identifier or organization code.
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    /** Protocol identifier or organization code.
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     */
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     */
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    uint8_t     protocol[ 3 ];
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    uint8_t     protocol[ 3 ];
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    /** Ethernet protocol identifier in the network byte order (big endian).
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    /** Ethernet protocol identifier in the network byte order (big endian).
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     *  @see ethernet_protocols.h
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     *  @see ethernet_protocols.h
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     *  @see ethernet_protocols.h
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     *  @see ethernet_protocols.h
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     */
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     */
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    uint16_t    ethertype;
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    uint16_t    ethertype;
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} __attribute__ ((packed));
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} __attribute__ ((packed));
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/** Ethernet header with all the extensions.
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/** Ethernet header IEEE 802.3 + 802.2 extension.
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 */
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struct eth_header_lsap{
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    /** Ethernet header.
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     */
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    eth_header_t        header;
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    /** LSAP extension.
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     *  If DSAP and SSAP are set to ETH_LSAP_SNAP the SNAP extension is being used.
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     *  If DSAP and SSAP fields are equal to ETH_RAW the raw Ethernet packet without any extensions is being used and the frame content starts rigth after the two fields.
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     */
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    eth_ieee_lsap_t     lsap;
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} __attribute__ ((packed));
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/** Ethernet header IEEE 802.3 + 802.2 + SNAP extensions.
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 */
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 */
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struct eth_header_ex{
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struct eth_header_snap{
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    /** Ethernet header.
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    /** Ethernet header.
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     */
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     */
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    eth_header_t        header;
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    eth_header_t        header;
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    /** LSAP extension.
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    /** LSAP extension.
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     *  If DSAP and SSAP are set to ETH_LSAP_SNAP the SNAP extension is being used.
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     *  If DSAP and SSAP are set to ETH_LSAP_SNAP the SNAP extension is being used.
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     *  If DSAP and SSAP fields are equal to ETH_RAW the raw Ethernet packet without any extensions is being used and the frame content starts rigth after the two fields.
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     *  If DSAP and SSAP fields are equal to ETH_RAW the raw Ethernet packet without any extensions is being used and the frame content starts rigth after the two fields.
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     */
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     */
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    eth_header_lsap_t   lsap;
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    eth_ieee_lsap_t     lsap;
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    /** SNAP extension.
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    /** SNAP extension.
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     */
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     */
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    eth_header_snap_t   snap;
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    eth_snap_t          snap;
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} __attribute__ ((packed));
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} __attribute__ ((packed));
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/** Ethernet Frame Check Sequence.
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/** Ethernet Frame Check Sequence.
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 */
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 */
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typedef uint32_t        eth_fcs_t;
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typedef uint32_t        eth_fcs_t;