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Annotation of 43BSD/etc/XNSrouted/protocol.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1985 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  *
                      6:  *     @(#)protocol.h  5.4 (Berkeley) 2/14/86";
                      7:  *
                      8:  * Includes material written at Cornell University by Bill Nesheim,
                      9:  * by permission of the author.
                     10:  */
                     11: 
                     12: /*
                     13:  * Xerox Routing Information Protocol
                     14:  *
                     15:  */
                     16: 
                     17: struct netinfo {
                     18:        union ns_net    rip_dst;                /* destination net */
                     19:        u_short         rip_metric;             /* cost of route */
                     20: };
                     21: 
                     22: struct rip {
                     23:        u_short rip_cmd;                /* request/response */
                     24:        struct netinfo rip_nets[1];     /* variable length */
                     25: };
                     26:  
                     27: /*
                     28:  * Packet types.
                     29:  */
                     30: #define        RIPCMD_REQUEST          1       /* want info */
                     31: #define        RIPCMD_RESPONSE         2       /* responding to request */
                     32: 
                     33: #define        RIPCMD_MAX              3
                     34: #ifdef RIPCMDS
                     35: char *ripcmds[RIPCMD_MAX] =
                     36:   { "#0", "REQUEST", "RESPONSE" };
                     37: #endif
                     38: 
                     39: #define        HOPCNT_INFINITY         16              /* per Xerox NS */
                     40: #define        DSTNETS_ALL             0xffffffff      /* per Xerox NS */
                     41: #define        MAXPACKETSIZE           512             /* max broadcast size */
                     42: 
                     43: extern union ns_net ns_anynet;
                     44: extern union ns_net ns_zeronet;
                     45: 
                     46: /*
                     47:  * Timer values used in managing the routing table.
                     48:  * Every update forces an entry's timer to be reset.  After
                     49:  * EXPIRE_TIME without updates, the entry is marked invalid,
                     50:  * but held onto until GARBAGE_TIME so that others may
                     51:  * see it "be deleted".
                     52:  */
                     53: #define        TIMER_RATE              30      /* alarm clocks every 30 seconds */
                     54: 
                     55: #define        SUPPLY_INTERVAL         30      /* time to supply tables */
                     56: 
                     57: #define        EXPIRE_TIME             180     /* time to mark entry invalid */
                     58: #define        GARBAGE_TIME            240     /* time to garbage collect */

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