usr/src/sbin/routed/defs.h

/*      defs.h  4.6     82/06/05        */

/*
 * Internal data structure definitions for
 * user routing process.  Based on Xerox NS
 * protocol specs with mods relevant to more
 * general addressing scheme.
 */
#include <net/route.h>

/*
 * 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_gateway;
                        short   rtu_flags;
                        short   rtu_retry;
                        short   rtu_timer;
                        short   rtu_state;
                        int     rtu_metric;
                        struct  ifnet *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_gateway      rt_rtu.rtu_entry.rtu_gateway    /* who to forward to */
#define rt_flags        rt_rtu.rtu_entry.rtu_flags      /* kernel flags */
#define rt_retry        rt_rtu.rtu_entry.rtu_retry      /* retries of ioctl */
#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_DELRT       0x1             /* delete pending */
#define RTS_CHGRT       0x2             /* change command pending */
#define RTS_ADDRT       0x4             /* add command pending */
#define RTS_HIDDEN      0x8             /* don't send to router */

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

/*
 * Per address family routines.
 */
struct afswitch {
        int     (*af_hash)();           /* returns keys based on address */
        int     (*af_netmatch)();       /* verifies net # matching */
        int     (*af_output)();         /* interprets address for sending */
        int     (*af_portmatch)();      /* packet from some other router? */
        int     (*af_portcheck)();      /* packet from priviledged peer? */
        int     (*af_checkhost)();      /* tells if address for host or net */
        int     (*af_canon)();          /* canonicalize address for compares */
};

/*
 * Structure returned by af_hash routines.
 */
struct afhash {
        u_int   afh_hosthash;           /* host based hash */
        u_int   afh_nethash;            /* network based hash */
};

struct  afswitch afswitch[AF_MAX];      /* table proper */