aziflaj

#define MAX_PKT 1024                    /* packet size in bytes */

typedef enum { false, true } boolean;   /* boolean type */
typedef unsigned int seq_nr;            /* sequence or ACK numbers */

typedef struct {
    unsigned char data[MAX_PKT];
} packet;                               /* packet definition */
typedef enum { data, ack, nak } frame_kind; /* frame kind definition */