1 /*!\file netinet/ip_mrout.h
2 * IP multicast forwarding.
6 * Copyright (c) 1989 Stephen Deering.
7 * Copyright (c) 1992, 1993
8 * The Regents of the University of California. All rights reserved.
10 * This code is derived from software contributed to Berkeley by
11 * Stephen Deering of Stanford University.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. All advertising materials mentioning features or use of this software
22 * must display the following acknowledgement:
23 * This product includes software developed by the University of
24 * California, Berkeley and its contributors.
25 * 4. Neither the name of the University nor the names of its contributors
26 * may be used to endorse or promote products derived from this software
27 * without specific prior written permission.
29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 * @(#)ip_mroute.h 8.1 (Berkeley) 6/10/93
42 * $Id: ip_mroute.h,v 1.10.4.1 1997/02/22 19:47:28 joerg Exp $
45 #ifndef __NETINET_IP_MROUTE_H
46 #define __NETINET_IP_MROUTE_H
49 * Definitions for IP multicast forwarding.
51 * Written by David Waitzman, BBN Labs, August 1988.
52 * Modified by Steve Deering, Stanford, February 1989.
53 * Modified by Ajit Thyagarajan, PARC, August 1993.
54 * Modified by Ajit Thyagarajan, PARC, August 1994.
56 * MROUTING Revision: 3.3.1.3
61 * Multicast Routing set/getsockopt commands.
63 #define MRT_INIT 100 /* initialize forwarder */
64 #define MRT_DONE 101 /* shut down forwarder */
65 #define MRT_ADD_VIF 102 /* create virtual interface */
66 #define MRT_DEL_VIF 103 /* delete virtual interface */
67 #define MRT_ADD_MFC 104 /* insert forwarding cache entry */
68 #define MRT_DEL_MFC 105 /* delete forwarding cache entry */
69 #define MRT_VERSION 106 /* get kernel version number */
70 #define MRT_ASSERT 107 /* enable PIM assert processing */
73 #define GET_TIME(t) microtime(&t)
76 * Types and macros for handling bitmaps with one bit per virtual interface.
79 typedef u_long vifbitmap_t;
80 typedef u_short vifi_t; /* type of a vif index */
81 #define ALL_VIFS (vifi_t)-1
83 #define VIFM_SET(n, m) ((m) |= (1 << (n)))
84 #define VIFM_CLR(n, m) ((m) &= ~(1 << (n)))
85 #define VIFM_ISSET(n, m) ((m) & (1 << (n)))
86 #define VIFM_CLRALL(m) ((m) = 0x00000000)
87 #define VIFM_COPY(mfrom, mto) ((mto) = (mfrom))
88 #define VIFM_SAME(m1, m2) ((m1) == (m2))
92 * Argument structure for MRT_ADD_VIF.
93 * (MRT_DEL_VIF takes a single vifi_t argument.)
96 vifi_t vifc_vifi; /* the index of the vif to be added */
97 u_char vifc_flags; /* VIFF_ flags defined below */
98 u_char vifc_threshold; /* min ttl required to forward on vif */
99 u_int vifc_rate_limit; /* max rate */
100 struct in_addr vifc_lcl_addr; /* local interface address */
101 struct in_addr vifc_rmt_addr; /* remote address (tunnels only) */
104 #define VIFF_TUNNEL 0x1 /* vif represents a tunnel end-point */
105 #define VIFF_SRCRT 0x2 /* tunnel uses IP source routing */
108 * Argument structure for MRT_ADD_MFC and MRT_DEL_MFC
109 * (mfcc_tos to be added at a future point)
112 struct in_addr mfcc_origin; /* ip origin of mcasts */
113 struct in_addr mfcc_mcastgrp; /* multicast group associated*/
114 vifi_t mfcc_parent; /* incoming vif */
115 u_char mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
119 * The kernel's multicast routing statistics.
122 u_long mrts_mfc_lookups; /* # forw. cache hash table hits */
123 u_long mrts_mfc_misses; /* # forw. cache hash table misses */
124 u_long mrts_upcalls; /* # calls to mrouted */
125 u_long mrts_no_route; /* no route for packet's origin */
126 u_long mrts_bad_tunnel; /* malformed tunnel options */
127 u_long mrts_cant_tunnel; /* no room for tunnel options */
128 u_long mrts_wrong_if; /* arrived on wrong interface */
129 u_long mrts_upq_ovflw; /* upcall Q overflow */
130 u_long mrts_cache_cleanups; /* # entries with no upcalls */
131 u_long mrts_drop_sel; /* pkts dropped selectively */
132 u_long mrts_q_overflow; /* pkts dropped - Q overflow */
133 u_long mrts_pkt2large; /* pkts dropped - size > BKT SIZE */
134 u_long mrts_upq_sockfull; /* upcalls dropped - socket full */
138 * Argument structure used by mrouted to get src-grp pkt counts
149 * Argument structure used by mrouted to get vif pkt counts
151 struct sioc_vif_req {
152 vifi_t vifi; /* vif number */
153 u_long icount; /* Input packet count on vif */
154 u_long ocount; /* Output packet count on vif */
155 u_long ibytes; /* Input byte count on vif */
156 u_long obytes; /* Output byte count on vif */
161 * The kernel's virtual-interface structure.
164 u_char v_flags; /* VIFF_ flags defined above */
165 u_char v_threshold; /* min ttl required to forward on vif*/
166 u_int v_rate_limit; /* max rate */
167 struct tbf *v_tbf; /* token bucket structure at intf. */
168 struct in_addr v_lcl_addr; /* local interface address */
169 struct in_addr v_rmt_addr; /* remote address (tunnels only) */
170 struct ifnet *v_ifp; /* pointer to interface */
171 u_long v_pkt_in; /* # pkts in on interface */
172 u_long v_pkt_out; /* # pkts out on interface */
173 u_long v_bytes_in; /* # bytes in on interface */
174 u_long v_bytes_out; /* # bytes out on interface */
175 struct route v_route; /* cached route if this is a tunnel */
176 u_int v_rsvp_on; /* RSVP listening on this vif */
177 struct socket *v_rsvpd; /* RSVP daemon socket */
181 * The kernel's multicast forwarding cache entry structure
182 * (A field for the type of service (mfc_tos) is to be added
186 struct in_addr mfc_origin; /* IP origin of mcasts */
187 struct in_addr mfc_mcastgrp; /* multicast group associated*/
188 vifi_t mfc_parent; /* incoming vif */
189 u_char mfc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
190 u_long mfc_pkt_cnt; /* pkt count for src-grp */
191 u_long mfc_byte_cnt; /* byte count for src-grp */
192 u_long mfc_wrong_if; /* wrong if for src-grp */
193 int mfc_expire; /* time to clean entry up */
194 struct timeval mfc_last_assert; /* last time I sent an assert*/
198 * Struct used to communicate from kernel to multicast router
199 * note the convenient similarity to an IP packet
204 u_char im_msgtype; /* what type of message */
205 #define IGMPMSG_NOCACHE 1
206 #define IGMPMSG_WRONGVIF 2
207 u_char im_mbz; /* must be zero */
208 u_char im_vif; /* vif rec'd on */
210 struct in_addr im_src, im_dst;
214 * Argument structure used for pkt info. while upcall is made
217 struct mbuf *m; /* A copy of the packet */
218 struct ifnet *ifp; /* Interface pkt came in on */
219 vifi_t xmt_vif; /* Saved copy of imo_multicast_vif */
221 struct timeval t; /* Timestamp */
225 #define MFCTBLSIZ 256
226 #if (MFCTBLSIZ & (MFCTBLSIZ - 1)) == 0 /* from sys:route.h */
227 #define MFCHASHMOD(h) ((h) & (MFCTBLSIZ - 1))
229 #define MFCHASHMOD(h) ((h) % MFCTBLSIZ)
232 #define MAX_UPQ 4 /* max. no of pkts in upcall Q */
235 * Token Bucket filter code
237 #define MAX_BKT_SIZE 10000 /* 10K bytes size */
238 #define MAXQSIZE 10 /* max # of pkts in queue */
241 * the token bucket filter at each vif
245 struct timeval tbf_last_pkt_t; /* arr. time of last pkt */
246 u_long tbf_n_tok; /* no of tokens in bucket */
247 u_long tbf_q_len; /* length of queue at this vif */
248 u_long tbf_max_q_len; /* max. queue length */
249 struct mbuf *tbf_q; /* Packet queue */
250 struct mbuf *tbf_t; /* tail-insertion pointer */