1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)table.h 8.1 (Berkeley) 06/05/93 8 */ 9 10 /* 11 * Routing table management daemon. 12 */ 13 14 /* 15 * Routing table structure; differs a bit from kernel tables. 16 * 17 * Note: the union below must agree in the first 4 members 18 * so the ioctl's will work. 19 */ 20 struct rthash { 21 struct rt_entry *rt_forw; 22 struct rt_entry *rt_back; 23 }; 24 #ifdef RTM_ADD 25 #define rtentry ortentry 26 #endif 27 28 struct rt_entry { 29 struct rt_entry *rt_forw; 30 struct rt_entry *rt_back; 31 union { 32 struct rtentry rtu_rt; 33 struct rtuentry { 34 u_long rtu_hash; 35 struct sockaddr rtu_dst; 36 struct sockaddr rtu_router; 37 short rtu_rtflags; /* used by rtioctl */ 38 short rtu_wasted[5]; 39 int rtu_flags; 40 int 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_entry /* 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 0x80000 /* 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(); 83