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cb1c44c2 | 1 | /* |
1810611d | 2 | * Copyright (c) 1980, 1986 Regents of the University of California. |
5b519e94 | 3 | * All rights reserved. |
cb1c44c2 | 4 | * |
5b519e94 | 5 | * Redistribution and use in source and binary forms are permitted |
50c7758a KB |
6 | * provided that the above copyright notice and this paragraph are |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
5b519e94 | 16 | * |
50c7758a | 17 | * @(#)route.h 7.4 (Berkeley) %G% |
cb1c44c2 | 18 | */ |
6c0a063b SL |
19 | |
20 | /* | |
a9f3e174 SL |
21 | * Kernel resident routing tables. |
22 | * | |
a839f328 MK |
23 | * The routing tables are initialized when interface addresses |
24 | * are set by making entries for all directly connected interfaces. | |
6c0a063b | 25 | */ |
6c0a063b | 26 | |
a13c006d BJ |
27 | /* |
28 | * A route consists of a destination address and a reference | |
29 | * to a routing entry. These are often held by protocols | |
30 | * in their control blocks, e.g. inpcb. | |
31 | */ | |
6c0a063b SL |
32 | struct route { |
33 | struct rtentry *ro_rt; | |
34 | struct sockaddr ro_dst; | |
6c0a063b SL |
35 | }; |
36 | ||
37 | /* | |
a13c006d BJ |
38 | * We distinguish between routes to hosts and routes to networks, |
39 | * preferring the former if available. For each route we infer | |
40 | * the interface to use from the gateway address supplied when | |
41 | * the route was entered. Routes that forward packets through | |
42 | * gateways are marked so that the output routines know to address the | |
43 | * gateway rather than the ultimate destination. | |
6c0a063b | 44 | */ |
a13c006d BJ |
45 | struct rtentry { |
46 | u_long rt_hash; /* to speed lookups */ | |
47 | struct sockaddr rt_dst; /* key */ | |
48 | struct sockaddr rt_gateway; /* value */ | |
49 | short rt_flags; /* up/down?, host/net */ | |
50 | short rt_refcnt; /* # held references */ | |
51 | u_long rt_use; /* raw # packets forwarded */ | |
52 | struct ifnet *rt_ifp; /* the answer: interface to use */ | |
53 | }; | |
a13c006d | 54 | |
ee787340 | 55 | #define RTF_UP 0x1 /* route useable */ |
a13c006d | 56 | #define RTF_GATEWAY 0x2 /* destination is a gateway */ |
fc74f0c9 | 57 | #define RTF_HOST 0x4 /* host entry (net otherwise) */ |
a839f328 | 58 | #define RTF_DYNAMIC 0x10 /* created dynamically (by redirect) */ |
31150b52 | 59 | #define RTF_MODIFIED 0x20 /* modified dynamically (by redirect) */ |
6c0a063b | 60 | |
a9ea8834 SL |
61 | /* |
62 | * Routing statistics. | |
63 | */ | |
64 | struct rtstat { | |
65 | short rts_badredirect; /* bogus redirect calls */ | |
66 | short rts_dynamic; /* routes created by redirects */ | |
67 | short rts_newgateway; /* routes modified by redirects */ | |
68 | short rts_unreach; /* lookups which failed */ | |
69 | short rts_wildcard; /* lookups satisfied by a wildcard */ | |
70 | }; | |
71 | ||
72 | #ifdef KERNEL | |
a9f3e174 SL |
73 | #define RTFREE(rt) \ |
74 | if ((rt)->rt_refcnt == 1) \ | |
75 | rtfree(rt); \ | |
76 | else \ | |
77 | (rt)->rt_refcnt--; | |
a9ea8834 | 78 | |
b4ad5b30 MK |
79 | #ifdef GATEWAY |
80 | #define RTHASHSIZ 64 | |
81 | #else | |
0ab3c88a | 82 | #define RTHASHSIZ 8 |
b4ad5b30 | 83 | #endif |
0ab3c88a MK |
84 | #if (RTHASHSIZ & (RTHASHSIZ - 1)) == 0 |
85 | #define RTHASHMOD(h) ((h) & (RTHASHSIZ - 1)) | |
86 | #else | |
87 | #define RTHASHMOD(h) ((h) % RTHASHSIZ) | |
88 | #endif | |
a9ea8834 SL |
89 | struct mbuf *rthost[RTHASHSIZ]; |
90 | struct mbuf *rtnet[RTHASHSIZ]; | |
91 | struct rtstat rtstat; | |
92 | #endif |