[unix-history] / usr / src / sbin / routed / table.h

/*      table.h 4.1     83/01/11        */

/*
* Routing table management daemon.
*/

/*
* Routing table structure; differs a bit from kernel tables.
*
* Note: the union below must agree in the first 4 members
* so the ioctl's will work.
*/
struct rthash {
       struct  rt_entry *rt_forw;
       struct  rt_entry *rt_back;
};

struct rt_entry {
       struct  rt_entry *rt_forw;
       struct  rt_entry *rt_back;
       union {
               struct  rtentry rtu_rt;
               struct {
                       u_long  rtu_hash;
                       struct  sockaddr rtu_dst;
                       struct  sockaddr rtu_router;
                       short   rtu_flags;
                       short   rtu_state;
                       int     rtu_timer;
                       int     rtu_metric;
                       struct  interface *rtu_ifp;
               } rtu_entry;
       } rt_rtu;
};

#define rt_rt           rt_rtu.rtu_rt                   /* pass to ioctl */
#define rt_hash         rt_rtu.rtu_entry.rtu_hash       /* for net or host */
#define rt_dst          rt_rtu.rtu_entry.rtu_dst        /* match value */
#define rt_router       rt_rtu.rtu_entry.rtu_router     /* who to forward to */
#define rt_flags        rt_rtu.rtu_entry.rtu_flags      /* kernel flags */
#define rt_timer        rt_rtu.rtu_entry.rtu_timer      /* for invalidation */
#define rt_state        rt_rtu.rtu_entry.rtu_state      /* see below */
#define rt_metric       rt_rtu.rtu_entry.rtu_metric     /* cost of route */
#define rt_ifp          rt_rtu.rtu_entry.rtu_ifp        /* interface to take */

#define ROUTEHASHSIZ    19

/*
* "State" of routing table entry.
*/
#define RTS_CHANGED     0x1             /* route has been altered recently */
#define RTS_PASSIVE     0x20            /* don't time out route */
#define RTS_INTERFACE   0x40            /* route is for network interface */
#define RTS_REMOTE      0x80            /* route is for ``remote'' entity */

struct  rthash nethash[ROUTEHASHSIZ];
struct  rthash hosthash[ROUTEHASHSIZ];
struct  rt_entry *rtlookup();
struct  rt_entry *rtfind();