ip_mroute.h revision 1.2
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 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)ip_mroute.h 7.2 (Berkeley) 7/8/92 38 */ 39 40/* 41 * Definitions for the kernel part of DVMRP, 42 * a Distance-Vector Multicast Routing Protocol. 43 * (See RFC-1075.) 44 * 45 * Written by David Waitzman, BBN Labs, August 1988. 46 * Modified by Steve Deering, Stanford, February 1989. 47 * 48 * MROUTING 1.0 49 */ 50 51 52/* 53 * DVMRP-specific setsockopt commands. 54 */ 55#define DVMRP_INIT 100 56#define DVMRP_DONE 101 57#define DVMRP_ADD_VIF 102 58#define DVMRP_DEL_VIF 103 59#define DVMRP_ADD_LGRP 104 60#define DVMRP_DEL_LGRP 105 61#define DVMRP_ADD_MRT 106 62#define DVMRP_DEL_MRT 107 63 64 65/* 66 * Types and macros for handling bitmaps with one bit per virtual interface. 67 */ 68#define MAXVIFS 32 69typedef u_long vifbitmap_t; 70typedef u_short vifi_t; /* type of a vif index */ 71 72#define VIFM_SET(n, m) ((m) |= (1 << (n))) 73#define VIFM_CLR(n, m) ((m) &= ~(1 << (n))) 74#define VIFM_ISSET(n, m) ((m) & (1 << (n))) 75#define VIFM_CLRALL(m) ((m) = 0x00000000) 76#define VIFM_COPY(mfrom, mto) ((mto) = (mfrom)) 77#define VIFM_SAME(m1, m2) ((m1) == (m2)) 78 79 80/* 81 * Agument structure for DVMRP_ADD_VIF. 82 * (DVMRP_DEL_VIF takes a single vifi_t argument.) 83 */ 84struct vifctl { 85 vifi_t vifc_vifi; /* the index of the vif to be added */ 86 u_char vifc_flags; /* VIFF_ flags defined below */ 87 u_char vifc_threshold; /* min ttl required to forward on vif */ 88 struct in_addr vifc_lcl_addr; /* local interface address */ 89 struct in_addr vifc_rmt_addr; /* remote address (tunnels only) */ 90}; 91 92#define VIFF_TUNNEL 0x1 /* vif represents a tunnel end-point */ 93#define VIFF_SRCRT 0x2 /* tunnel uses IP src routing */ 94 95 96/* 97 * Argument structure for DVMRP_ADD_LGRP and DVMRP_DEL_LGRP. 98 */ 99struct lgrplctl { 100 vifi_t lgc_vifi; 101 struct in_addr lgc_gaddr; 102}; 103 104 105/* 106 * Argument structure for DVMRP_ADD_MRT. 107 * (DVMRP_DEL_MRT takes a single struct in_addr argument, containing origin.) 108 */ 109struct mrtctl { 110 struct in_addr mrtc_origin; /* subnet origin of multicasts */ 111 struct in_addr mrtc_originmask; /* subnet mask for origin */ 112 vifi_t mrtc_parent; /* incoming vif */ 113 vifbitmap_t mrtc_children; /* outgoing children vifs */ 114 vifbitmap_t mrtc_leaves; /* subset of outgoing children vifs */ 115}; 116 117 118#ifdef KERNEL 119 120/* 121 * The kernel's virtual-interface structure. 122 */ 123struct vif { 124 u_char v_flags; /* VIFF_ flags defined above */ 125 u_char v_threshold; /* min ttl required to forward on vif */ 126 struct in_addr v_lcl_addr; /* local interface address */ 127 struct in_addr v_rmt_addr; /* remote address (tunnels only) */ 128 struct ifnet *v_ifp; /* pointer to interface */ 129 struct in_addr *v_lcl_grps; /* list of local grps (phyints only) */ 130 int v_lcl_grps_max; /* malloc'ed number of v_lcl_grps */ 131 int v_lcl_grps_n; /* used number of v_lcl_grps */ 132 u_long v_cached_group; /* last grp looked-up (phyints only) */ 133 int v_cached_result; /* last look-up result (phyints only) */ 134}; 135 136/* 137 * The kernel's multicast route structure. 138 */ 139struct mrt { 140 struct in_addr mrt_origin; /* subnet origin of multicasts */ 141 struct in_addr mrt_originmask; /* subnet mask for origin */ 142 vifi_t mrt_parent; /* incoming vif */ 143 vifbitmap_t mrt_children; /* outgoing children vifs */ 144 vifbitmap_t mrt_leaves; /* subset of outgoing children vifs */ 145 struct mrt *mrt_next; /* forward link */ 146}; 147 148 149#define MRTHASHSIZ 256 150#if (MRTHASHSIZ & (MRTHASHSIZ - 1)) == 0 /* from sys:route.h */ 151#define MRTHASHMOD(h) ((h) & (MRTHASHSIZ - 1)) 152#else 153#define MRTHASHMOD(h) ((h) % MRTHASHSIZ) 154#endif 155 156/* 157 * The kernel's multicast routing statistics. 158 */ 159struct mrtstat { 160 u_long mrts_mrt_lookups; /* # multicast route lookups */ 161 u_long mrts_mrt_misses; /* # multicast route cache misses */ 162 u_long mrts_grp_lookups; /* # group address lookups */ 163 u_long mrts_grp_misses; /* # group address cache misses */ 164 u_long mrts_no_route; /* no route for packet's origin */ 165 u_long mrts_bad_tunnel; /* malformed tunnel options */ 166 u_long mrts_cant_tunnel; /* no room for tunnel options */ 167 u_long mrts_wrong_if; /* arrived on wrong interface */ 168}; 169 170int ip_mrouter_cmd __P((int, struct socket *, struct mbuf *)); 171int ip_mrouter_done __P(()); 172 173#endif /* KERNEL */ 174 175