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typedef enum device_state   device_state_t;

typedef struct device_stats device_stats_t;

typedef device_stats_t *    device_stats_ref;

enum    device_state{

    NETIF_NULL = 0,

    NETIF_STOPPED,

    NETIF_ACTIVE,

    NETIF_CARRIER_LOST

};

// based on linux_kernel/include/linux/netdevice.h

struct  device_stats{

    unsigned long   rx_packets;     /* total packets received   */

    unsigned long   tx_packets;     /* total packets transmitted    */

    unsigned long   rx_bytes;       /* total bytes received     */

    unsigned long   tx_bytes;       /* total bytes transmitted  */

    unsigned long   rx_errors;      /* bad packets received     */

    unsigned long   tx_errors;      /* packet transmit problems */

    unsigned long   rx_dropped;     /* no space in linux buffers    */

    unsigned long   tx_dropped;     /* no space available in linux  */

    unsigned long   multicast;      /* multicast packets received   */

    unsigned long   collisions;

    /* detailed rx_errors: */

    unsigned long   rx_length_errors;

    unsigned long   rx_over_errors;     /* receiver ring buff overflow  */

    unsigned long   rx_crc_errors;      /* recved pkt with crc error    */

    unsigned long   rx_frame_errors;    /* recv'd frame alignment error */

    unsigned long   rx_fifo_errors;     /* recv'r fifo overrun      */

    unsigned long   rx_missed_errors;   /* receiver missed packet   */

    /* detailed tx_errors */

    unsigned long   tx_aborted_errors;

    unsigned long   tx_carrier_errors;

    unsigned long   tx_fifo_errors;

    unsigned long   tx_heartbeat_errors;

    unsigned long   tx_window_errors;

    /* for cslip etc */

    unsigned long   rx_compressed;

    unsigned long   tx_compressed;

};