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Annotation of 43BSDTahoe/etc/routed/table.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that this notice is preserved and that due credit is given
        !             7:  * to the University of California at Berkeley. The name of the University
        !             8:  * may not be used to endorse or promote products derived from this
        !             9:  * software without specific prior written permission. This software
        !            10:  * is provided ``as is'' without express or implied warranty.
        !            11:  *
        !            12:  *     @(#)table.h     5.5 (Berkeley) 2/16/88
        !            13:  */
        !            14: 
        !            15: /*
        !            16:  * Routing table management daemon.
        !            17:  */
        !            18: 
        !            19: /*
        !            20:  * Routing table structure; differs a bit from kernel tables.
        !            21:  *
        !            22:  * Note: the union below must agree in the first 4 members
        !            23:  * so the ioctl's will work.
        !            24:  */
        !            25: struct rthash {
        !            26:        struct  rt_entry *rt_forw;
        !            27:        struct  rt_entry *rt_back;
        !            28: };
        !            29: 
        !            30: struct rt_entry {
        !            31:        struct  rt_entry *rt_forw;
        !            32:        struct  rt_entry *rt_back;
        !            33:        union {
        !            34:                struct  rtentry rtu_rt;
        !            35:                struct {
        !            36:                        u_long  rtu_hash;
        !            37:                        struct  sockaddr rtu_dst;
        !            38:                        struct  sockaddr rtu_router;
        !            39:                        short   rtu_flags;
        !            40:                        short   rtu_state;
        !            41:                        int     rtu_timer;
        !            42:                        int     rtu_metric;
        !            43:                        int     rtu_ifmetric;
        !            44:                        struct  interface *rtu_ifp;
        !            45:                } rtu_entry;
        !            46:        } rt_rtu;
        !            47: };
        !            48: 
        !            49: #define        rt_rt           rt_rtu.rtu_rt                   /* pass to ioctl */
        !            50: #define        rt_hash         rt_rtu.rtu_entry.rtu_hash       /* for net or host */
        !            51: #define        rt_dst          rt_rtu.rtu_entry.rtu_dst        /* match value */
        !            52: #define        rt_router       rt_rtu.rtu_entry.rtu_router     /* who to forward to */
        !            53: #define        rt_flags        rt_rtu.rtu_entry.rtu_flags      /* kernel flags */
        !            54: #define        rt_timer        rt_rtu.rtu_entry.rtu_timer      /* for invalidation */
        !            55: #define        rt_state        rt_rtu.rtu_entry.rtu_state      /* see below */
        !            56: #define        rt_metric       rt_rtu.rtu_entry.rtu_metric     /* cost of route */
        !            57: #define        rt_ifmetric     rt_rtu.rtu_entry.rtu_ifmetric   /* cost of route if */
        !            58: #define        rt_ifp          rt_rtu.rtu_entry.rtu_ifp        /* interface to take */
        !            59: 
        !            60: #define        ROUTEHASHSIZ    32              /* must be a power of 2 */
        !            61: #define        ROUTEHASHMASK   (ROUTEHASHSIZ - 1)
        !            62: 
        !            63: /*
        !            64:  * "State" of routing table entry.
        !            65:  */
        !            66: #define        RTS_CHANGED     0x1             /* route has been altered recently */
        !            67: #define        RTS_EXTERNAL    0x2             /* extern info, not installed or sent */
        !            68: #define        RTS_INTERNAL    0x4             /* internal route, not installed */
        !            69: #define        RTS_PASSIVE     IFF_PASSIVE     /* don't time out route */
        !            70: #define        RTS_INTERFACE   IFF_INTERFACE   /* route is for network interface */
        !            71: #define        RTS_REMOTE      IFF_REMOTE      /* route is for ``remote'' entity */
        !            72: #define        RTS_SUBNET      IFF_SUBNET      /* route is for network subnet */
        !            73: 
        !            74: /*
        !            75:  * Flags are same as kernel, with this addition for af_rtflags:
        !            76:  */
        !            77: #define        RTF_SUBNET      0x8000          /* pseudo: route to subnet */
        !            78: 
        !            79: struct rthash nethash[ROUTEHASHSIZ];
        !            80: struct rthash hosthash[ROUTEHASHSIZ];
        !            81: struct rt_entry *rtlookup();
        !            82: struct rt_entry *rtfind();

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