projects / unix-history / blame
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| e69f81e0 | 1 | /* |
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2 | * Copyright (c) 1985 The Regents of the University of California. |
| 3 | * All rights reserved. | |
| e69f81e0 | 4 | * |
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5 | * This file includes significant work done at Cornell University by |
| 6 | * Bill Nesheim. That work included by permission. | |
| e69f81e0 | 7 | * |
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8 | * Redistribution and use in source and binary forms are permitted |
| 9 | * provided that the above copyright notice and this paragraph are | |
| 10 | * duplicated in all such forms and that any documentation, | |
| 11 | * advertising materials, and other materials related to such | |
| 12 | * distribution and use acknowledge that the software was developed | |
| 13 | * by the University of California, Berkeley. The name of the | |
| 14 | * University may not be used to endorse or promote products derived | |
| 15 | * from this software without specific prior written permission. | |
| 16 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
| 17 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
| 18 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
| 19 | * | |
| 20 | * @(#)protocol.h 5.5 (Berkeley) %G% | |
| e69f81e0 KS |
21 | */ |
| 22 | ||
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23 | /* |
| 24 | * Xerox Routing Information Protocol | |
| 25 | * | |
| 26 | */ | |
| 27 | ||
| 28 | struct netinfo { | |
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29 | union ns_net rip_dst; /* destination net */ |
| 30 | u_short rip_metric; /* cost of route */ | |
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31 | }; |
| 32 | ||
| 33 | struct rip { | |
| 34 | u_short rip_cmd; /* request/response */ | |
| 35 | struct netinfo rip_nets[1]; /* variable length */ | |
| 36 | }; | |
| 37 | ||
| 38 | /* | |
| 39 | * Packet types. | |
| 40 | */ | |
| 41 | #define RIPCMD_REQUEST 1 /* want info */ | |
| 42 | #define RIPCMD_RESPONSE 2 /* responding to request */ | |
| 43 | ||
| 44 | #define RIPCMD_MAX 3 | |
| 45 | #ifdef RIPCMDS | |
| 46 | char *ripcmds[RIPCMD_MAX] = | |
| 47 | { "#0", "REQUEST", "RESPONSE" }; | |
| 48 | #endif | |
| 49 | ||
| 50 | #define HOPCNT_INFINITY 16 /* per Xerox NS */ | |
| 84f93e8f | 51 | #define DSTNETS_ALL 0xffffffff /* per Xerox NS */ |
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52 | #define MAXPACKETSIZE 512 /* max broadcast size */ |
| 53 | ||
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54 | extern union ns_net ns_anynet; |
| 55 | extern union ns_net ns_zeronet; | |
| 56 | ||
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57 | /* |
| 58 | * Timer values used in managing the routing table. | |
| 59 | * Every update forces an entry's timer to be reset. After | |
| 60 | * EXPIRE_TIME without updates, the entry is marked invalid, | |
| 61 | * but held onto until GARBAGE_TIME so that others may | |
| 62 | * see it "be deleted". | |
| 63 | */ | |
| 64 | #define TIMER_RATE 30 /* alarm clocks every 30 seconds */ | |
| 65 | ||
| 66 | #define SUPPLY_INTERVAL 30 /* time to supply tables */ | |
| 67 | ||
| 68 | #define EXPIRE_TIME 180 /* time to mark entry invalid */ | |
| 69 | #define GARBAGE_TIME 240 /* time to garbage collect */ |