usr/src/sys/deprecated/netpup/pup.h

/*      pup.h   6.1     83/07/29        */

struct  pupport {
        u_char  pup_net;
        u_char  pup_host;
        u_char  pup_socket[4];
};

/*
 * PUP header.
 */
struct pup_header {
        u_short pup_length;
        u_char  pup_tcontrol;           /* transport control */
        u_char  pup_type;               /* protocol type */
        u_long  pup_id;                 /* used by protocols */
        u_char  pup_dnet;               /* destination */
        u_char  pup_dhost;
        u_char  pup_dsock[4];
        u_char  pup_snet;               /* source */
        u_char  pup_shost;
        u_char  pup_ssock[4];
};

#define PUP_TRACE       01              /* trace pup in network */

#define MINPUPSIZ       (sizeof (struct pup_header) + sizeof (short))
#define MAXPUPDATA      532
#define MAXPUPSIZ       (MINPUPSIZ + MAXPUPDATA)

#define PUP_NOCKSUM     0xffff          /* no checksum supplied */

/*
 * A sockaddr, as seen through the eyes of PUP.
 */
struct sockaddr_pup {
        short   spup_family;
        short   spup_zero1;
        u_char  spup_net;
        u_char  spup_host;
        u_char  spup_sock[4];
        char    spup_zero2[4];
};