1 /* 2 * Copyright (c) 1989 Stephen Deering. 3 * Copyright (c) 1992 Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Stephen Deering of Stanford University. 8 * 9 * %sccs.include.redist.c% 10 * 11 * @(#)ip_mroute.h 7.3 (Berkeley) 06/04/93 12 */ 13 14 /* 15 * Definitions for the kernel part of DVMRP, 16 * a Distance-Vector Multicast Routing Protocol. 17 * (See RFC-1075.) 18 * 19 * Written by David Waitzman, BBN Labs, August 1988. 20 * Modified by Steve Deering, Stanford, February 1989. 21 * 22 * MROUTING 1.0 23 */ 24 25 26 /* 27 * DVMRP-specific setsockopt commands. 28 */ 29 #define DVMRP_INIT 100 30 #define DVMRP_DONE 101 31 #define DVMRP_ADD_VIF 102 32 #define DVMRP_DEL_VIF 103 33 #define DVMRP_ADD_LGRP 104 34 #define DVMRP_DEL_LGRP 105 35 #define DVMRP_ADD_MRT 106 36 #define DVMRP_DEL_MRT 107 37 38 39 /* 40 * Types and macros for handling bitmaps with one bit per virtual interface. 41 */ 42 #define MAXVIFS 32 43 typedef u_long vifbitmap_t; 44 typedef u_short vifi_t; /* type of a vif index */ 45 46 #define VIFM_SET(n, m) ((m) |= (1 << (n))) 47 #define VIFM_CLR(n, m) ((m) &= ~(1 << (n))) 48 #define VIFM_ISSET(n, m) ((m) & (1 << (n))) 49 #define VIFM_CLRALL(m) ((m) = 0x00000000) 50 #define VIFM_COPY(mfrom, mto) ((mto) = (mfrom)) 51 #define VIFM_SAME(m1, m2) ((m1) == (m2)) 52 53 54 /* 55 * Agument structure for DVMRP_ADD_VIF. 56 * (DVMRP_DEL_VIF takes a single vifi_t argument.) 57 */ 58 struct vifctl { 59 vifi_t vifc_vifi; /* the index of the vif to be added */ 60 u_char vifc_flags; /* VIFF_ flags defined below */ 61 u_char vifc_threshold; /* min ttl required to forward on vif */ 62 struct in_addr vifc_lcl_addr; /* local interface address */ 63 struct in_addr vifc_rmt_addr; /* remote address (tunnels only) */ 64 }; 65 66 #define VIFF_TUNNEL 0x1 /* vif represents a tunnel end-point */ 67 68 69 /* 70 * Argument structure for DVMRP_ADD_LGRP and DVMRP_DEL_LGRP. 71 */ 72 struct lgrplctl { 73 vifi_t lgc_vifi; 74 struct in_addr lgc_gaddr; 75 }; 76 77 78 /* 79 * Argument structure for DVMRP_ADD_MRT. 80 * (DVMRP_DEL_MRT takes a single struct in_addr argument, containing origin.) 81 */ 82 struct mrtctl { 83 struct in_addr mrtc_origin; /* subnet origin of multicasts */ 84 struct in_addr mrtc_originmask; /* subnet mask for origin */ 85 vifi_t mrtc_parent; /* incoming vif */ 86 vifbitmap_t mrtc_children; /* outgoing children vifs */ 87 vifbitmap_t mrtc_leaves; /* subset of outgoing children vifs */ 88 }; 89 90 91 #ifdef KERNEL 92 93 /* 94 * The kernel's virtual-interface structure. 95 */ 96 struct vif { 97 u_char v_flags; /* VIFF_ flags defined above */ 98 u_char v_threshold; /* min ttl required to forward on vif */ 99 struct in_addr v_lcl_addr; /* local interface address */ 100 struct in_addr v_rmt_addr; /* remote address (tunnels only) */ 101 struct ifnet *v_ifp; /* pointer to interface */ 102 struct in_addr *v_lcl_grps; /* list of local grps (phyints only) */ 103 int v_lcl_grps_max; /* malloc'ed number of v_lcl_grps */ 104 int v_lcl_grps_n; /* used number of v_lcl_grps */ 105 u_long v_cached_group; /* last grp looked-up (phyints only) */ 106 int v_cached_result; /* last look-up result (phyints only) */ 107 }; 108 109 /* 110 * The kernel's multicast route structure. 111 */ 112 struct mrt { 113 struct in_addr mrt_origin; /* subnet origin of multicasts */ 114 struct in_addr mrt_originmask; /* subnet mask for origin */ 115 vifi_t mrt_parent; /* incoming vif */ 116 vifbitmap_t mrt_children; /* outgoing children vifs */ 117 vifbitmap_t mrt_leaves; /* subset of outgoing children vifs */ 118 struct mrt *mrt_next; /* forward link */ 119 }; 120 121 122 #define MRTHASHSIZ 64 123 #if (MRTHASHSIZ & (MRTHASHSIZ - 1)) == 0 /* from sys:route.h */ 124 #define MRTHASHMOD(h) ((h) & (MRTHASHSIZ - 1)) 125 #else 126 #define MRTHASHMOD(h) ((h) % MRTHASHSIZ) 127 #endif 128 129 /* 130 * The kernel's multicast routing statistics. 131 */ 132 struct mrtstat { 133 u_long mrts_mrt_lookups; /* # multicast route lookups */ 134 u_long mrts_mrt_misses; /* # multicast route cache misses */ 135 u_long mrts_grp_lookups; /* # group address lookups */ 136 u_long mrts_grp_misses; /* # group address cache misses */ 137 u_long mrts_no_route; /* no route for packet's origin */ 138 u_long mrts_bad_tunnel; /* malformed tunnel options */ 139 u_long mrts_cant_tunnel; /* no room for tunnel options */ 140 }; 141 142 143 int ip_mrouter_cmd __P((int, struct socket *, struct mbuf *)); 144 int ip_mrouter_done __P((void)); 145 146 #endif /* KERNEL */ 147 148