usr/src/sys/vax/if/if_hy.h

/*      if_hy.h 4.2     83/02/21        */

/*
 * Network Systems Corporation Hyperchannel
 *      routing database
 */

#define HYRSIZE  37     /* max number of adapters in routing tables */

struct hyroute {
        struct  timeval hyr_lasttime;           /* last update time */
        struct hy_hash {
                u_short hyr_flags;      /* status flags - see below */
                u_short hyr_key;                /* desired address */
                union {
                        /*
                         * direct entry (can get there directly)
                         */
                        struct {
                                u_short hyru_dst;               /* adapter number & port */
                                u_short hyru_ctl;               /* trunks to try */
                                u_short hyru_access;    /* access code (mostly unused) */
                        } hyr_d;
#define hyr_dst         hyr_u.hyr_d.hyru_dst
#define hyr_ctl         hyr_u.hyr_d.hyru_ctl
#define hyr_access      hyr_u.hyr_d.hyru_access
                        /*
                         * indirect entry (one or more hops required)
                         */
                        struct {
                                u_char hyru_pgate;      /* 1st gateway slot */
                                u_char hyru_egate;      /* # gateways */
                                u_char hyru_nextgate;   /* gateway to use next */
                        } hyr_i;
#define hyr_pgate       hyr_u.hyr_i.hyru_pgate
#define hyr_egate       hyr_u.hyr_i.hyru_egate
#define hyr_nextgate    hyr_u.hyr_i.hyru_nextgate
                } hyr_u;
        } hyr_hash[HYRSIZE];
        u_char hyr_gateway[256];
};

#ifdef KERNEL
struct hyroute hy_route[NHY];
#endif

#define HYR_INUSE       0x01    /* entry in use */
#define HYR_DIR         0x02    /* direct entry */
#define HYR_GATE        0x04    /* gateway entry */

#define HYRHASH(x) (((x) ^ ((x) >> 16)) % HYRSIZE)

#define HYSETROUTE      _IOW(H, 0x80, sizeof (struct hyroute))
#define HYGETROUTE      _IOR(H, 0x81, sizeof (struct hyroute))