174 lines
5.8 KiB
C
174 lines
5.8 KiB
C
/*
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* Copyright (c) 1989 Stephen Deering.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Stephen Deering of Stanford University.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ip_mroute.h 8.1 (Berkeley) 6/10/93
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*/
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/*
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* Definitions for the kernel part of DVMRP,
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* a Distance-Vector Multicast Routing Protocol.
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* (See RFC-1075.)
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*
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* Written by David Waitzman, BBN Labs, August 1988.
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* Modified by Steve Deering, Stanford, February 1989.
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*
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* MROUTING 1.0
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*/
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/*
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* DVMRP-specific setsockopt commands.
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*/
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#define DVMRP_INIT 100
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#define DVMRP_DONE 101
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#define DVMRP_ADD_VIF 102
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#define DVMRP_DEL_VIF 103
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#define DVMRP_ADD_LGRP 104
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#define DVMRP_DEL_LGRP 105
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#define DVMRP_ADD_MRT 106
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#define DVMRP_DEL_MRT 107
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/*
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* Types and macros for handling bitmaps with one bit per virtual interface.
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*/
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#define MAXVIFS 32
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typedef u_long vifbitmap_t;
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typedef u_short vifi_t; /* type of a vif index */
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#define VIFM_SET(n, m) ((m) |= (1 << (n)))
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#define VIFM_CLR(n, m) ((m) &= ~(1 << (n)))
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#define VIFM_ISSET(n, m) ((m) & (1 << (n)))
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#define VIFM_CLRALL(m) ((m) = 0x00000000)
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#define VIFM_COPY(mfrom, mto) ((mto) = (mfrom))
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#define VIFM_SAME(m1, m2) ((m1) == (m2))
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/*
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* Agument structure for DVMRP_ADD_VIF.
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* (DVMRP_DEL_VIF takes a single vifi_t argument.)
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*/
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struct vifctl {
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vifi_t vifc_vifi; /* the index of the vif to be added */
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u_char vifc_flags; /* VIFF_ flags defined below */
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u_char vifc_threshold; /* min ttl required to forward on vif */
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struct in_addr vifc_lcl_addr; /* local interface address */
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struct in_addr vifc_rmt_addr; /* remote address (tunnels only) */
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};
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#define VIFF_TUNNEL 0x1 /* vif represents a tunnel end-point */
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/*
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* Argument structure for DVMRP_ADD_LGRP and DVMRP_DEL_LGRP.
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*/
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struct lgrplctl {
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vifi_t lgc_vifi;
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struct in_addr lgc_gaddr;
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};
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/*
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* Argument structure for DVMRP_ADD_MRT.
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* (DVMRP_DEL_MRT takes a single struct in_addr argument, containing origin.)
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*/
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struct mrtctl {
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struct in_addr mrtc_origin; /* subnet origin of multicasts */
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struct in_addr mrtc_originmask; /* subnet mask for origin */
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vifi_t mrtc_parent; /* incoming vif */
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vifbitmap_t mrtc_children; /* outgoing children vifs */
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vifbitmap_t mrtc_leaves; /* subset of outgoing children vifs */
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};
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#ifdef KERNEL
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/*
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* The kernel's virtual-interface structure.
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*/
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struct vif {
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u_char v_flags; /* VIFF_ flags defined above */
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u_char v_threshold; /* min ttl required to forward on vif */
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struct in_addr v_lcl_addr; /* local interface address */
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struct in_addr v_rmt_addr; /* remote address (tunnels only) */
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struct ifnet *v_ifp; /* pointer to interface */
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struct in_addr *v_lcl_grps; /* list of local grps (phyints only) */
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int v_lcl_grps_max; /* malloc'ed number of v_lcl_grps */
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int v_lcl_grps_n; /* used number of v_lcl_grps */
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u_long v_cached_group; /* last grp looked-up (phyints only) */
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int v_cached_result; /* last look-up result (phyints only) */
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};
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/*
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* The kernel's multicast route structure.
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*/
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struct mrt {
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struct in_addr mrt_origin; /* subnet origin of multicasts */
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struct in_addr mrt_originmask; /* subnet mask for origin */
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vifi_t mrt_parent; /* incoming vif */
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vifbitmap_t mrt_children; /* outgoing children vifs */
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vifbitmap_t mrt_leaves; /* subset of outgoing children vifs */
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struct mrt *mrt_next; /* forward link */
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};
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#define MRTHASHSIZ 64
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#if (MRTHASHSIZ & (MRTHASHSIZ - 1)) == 0 /* from sys:route.h */
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#define MRTHASHMOD(h) ((h) & (MRTHASHSIZ - 1))
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#else
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#define MRTHASHMOD(h) ((h) % MRTHASHSIZ)
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#endif
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/*
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* The kernel's multicast routing statistics.
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*/
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struct mrtstat {
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u_long mrts_mrt_lookups; /* # multicast route lookups */
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u_long mrts_mrt_misses; /* # multicast route cache misses */
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u_long mrts_grp_lookups; /* # group address lookups */
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u_long mrts_grp_misses; /* # group address cache misses */
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u_long mrts_no_route; /* no route for packet's origin */
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u_long mrts_bad_tunnel; /* malformed tunnel options */
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u_long mrts_cant_tunnel; /* no room for tunnel options */
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};
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int ip_mrouter_cmd __P((int, struct socket *, struct mbuf *));
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int ip_mrouter_done __P((void));
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#endif /* KERNEL */
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