1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (C) 1998 WIDE Project.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * $KAME: ip6_mroute.h,v 1.19 2001/06/14 06:12:55 suz Exp $
32 * $FreeBSD$
33 */
34
35 /* BSDI ip_mroute.h,v 2.5 1996/10/11 16:01:48 pjd Exp */
36
37 /*
38 * Definitions for IP multicast forwarding.
39 *
40 * Written by David Waitzman, BBN Labs, August 1988.
41 * Modified by Steve Deering, Stanford, February 1989.
42 * Modified by Ajit Thyagarajan, PARC, August 1993.
43 * Modified by Ajit Thyagarajan, PARC, August 1994.
44 * Modified by Ahmed Helmy, USC, September 1996.
45 *
46 * MROUTING Revision: 1.2
47 */
48
49 #ifndef _NETINET6_IP6_MROUTE_H_
50 #define _NETINET6_IP6_MROUTE_H_
51
52 /*
53 * Multicast Routing set/getsockopt commands.
54 */
55 #ifdef _KERNEL
56 #define MRT6_OINIT 100 /* initialize forwarder (omrt6msg) */
57 #endif
58 #define MRT6_DONE 101 /* shut down forwarder */
59 #define MRT6_ADD_MIF 102 /* add multicast interface */
60 #define MRT6_DEL_MIF 103 /* delete multicast interface */
61 #define MRT6_ADD_MFC 104 /* insert forwarding cache entry */
62 #define MRT6_DEL_MFC 105 /* delete forwarding cache entry */
63 #define MRT6_PIM 107 /* enable pim code */
64 #define MRT6_INIT 108 /* initialize forwarder (mrt6msg) */
65
66 #if BSD >= 199103
67 #define GET_TIME(t) microtime(&t)
68 #elif defined(sun)
69 #define GET_TIME(t) uniqtime(&t)
70 #else
71 #define GET_TIME(t) ((t) = time)
72 #endif
73
74 /*
75 * Types and macros for handling bitmaps with one bit per multicast interface.
76 */
77 typedef u_short mifi_t; /* type of a mif index */
78 #define MAXMIFS 64
79
80 #ifndef IF_SETSIZE
81 #define IF_SETSIZE 256
82 #endif
83
84 typedef u_int32_t if_mask;
85 #define NIFBITS (sizeof(if_mask) * NBBY) /* bits per mask */
86
87 #ifndef howmany
88 #define howmany(x, y) (((x) + ((y) - 1)) / (y))
89 #endif
90
91 typedef struct if_set {
92 if_mask ifs_bits[howmany(IF_SETSIZE, NIFBITS)];
93 } if_set;
94
95 #define IF_SET(n, p) ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
96 #define IF_CLR(n, p) ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
97 #define IF_ISSET(n, p) ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
98 #define IF_COPY(f, t) bcopy(f, t, sizeof(*(f)))
99 #define IF_ZERO(p) bzero(p, sizeof(*(p)))
100
101 /*
102 * Argument structure for MRT6_ADD_IF.
103 */
104 struct mif6ctl {
105 mifi_t mif6c_mifi; /* the index of the mif to be added */
106 u_char mif6c_flags; /* MIFF_ flags defined below */
107 u_short mif6c_pifi; /* the index of the physical IF */
108 };
109
110 #define MIFF_REGISTER 0x1 /* mif represents a register end-point */
111
112 /*
113 * Argument structure for MRT6_ADD_MFC and MRT6_DEL_MFC
114 */
115 struct mf6cctl {
116 struct sockaddr_in6 mf6cc_origin; /* IPv6 origin of mcasts */
117 struct sockaddr_in6 mf6cc_mcastgrp; /* multicast group associated */
118 mifi_t mf6cc_parent; /* incoming ifindex */
119 struct if_set mf6cc_ifset; /* set of forwarding ifs */
120 };
121
122 /*
123 * The kernel's multicast routing statistics.
124 */
125 struct mrt6stat {
126 uint64_t mrt6s_mfc_lookups; /* # forw. cache hash table hits */
127 uint64_t mrt6s_mfc_misses; /* # forw. cache hash table misses */
128 uint64_t mrt6s_upcalls; /* # calls to multicast routing daemon */
129 uint64_t mrt6s_no_route; /* no route for packet's origin */
130 uint64_t mrt6s_bad_tunnel; /* malformed tunnel options */
131 uint64_t mrt6s_cant_tunnel; /* no room for tunnel options */
132 uint64_t mrt6s_wrong_if; /* arrived on wrong interface */
133 uint64_t mrt6s_upq_ovflw; /* upcall Q overflow */
134 uint64_t mrt6s_cache_cleanups; /* # entries with no upcalls */
135 uint64_t mrt6s_drop_sel; /* pkts dropped selectively */
136 uint64_t mrt6s_q_overflow; /* pkts dropped - Q overflow */
137 uint64_t mrt6s_pkt2large; /* pkts dropped - size > BKT SIZE */
138 uint64_t mrt6s_upq_sockfull; /* upcalls dropped - socket full */
139 };
140
141 #ifdef MRT6_OINIT
142 /*
143 * Struct used to communicate from kernel to multicast router
144 * note the convenient similarity to an IPv6 header.
145 * XXX old version, superseded by mrt6msg.
146 */
147 struct omrt6msg {
148 u_long unused1;
149 u_char im6_msgtype; /* what type of message */
150 u_char im6_mbz; /* must be zero */
151 u_char im6_mif; /* mif rec'd on */
152 u_char unused2;
153 struct in6_addr im6_src, im6_dst;
154 };
155 #endif
156
157 /*
158 * Structure used to communicate from kernel to multicast router.
159 * We'll overlay the structure onto an MLD header (not an IPv6 header
160 * like igmpmsg{} used for IPv4 implementation). This is because this
161 * structure will be passed via an IPv6 raw socket, on which an application
162 * will only receive the payload i.e. the data after the IPv6 header and all
163 * the extension headers. (see Section 3 of RFC3542)
164 */
165 struct mrt6msg {
166 #define MRT6MSG_NOCACHE 1
167 #define MRT6MSG_WRONGMIF 2
168 #define MRT6MSG_WHOLEPKT 3 /* used for user level encap*/
169 u_char im6_mbz; /* must be zero */
170 u_char im6_msgtype; /* what type of message */
171 u_int16_t im6_mif; /* mif rec'd on */
172 u_int32_t im6_pad; /* padding for 64bit arch */
173 struct in6_addr im6_src, im6_dst;
174 };
175
176 /*
177 * Argument structure used by multicast routing daemon to get src-grp
178 * packet counts
179 */
180 struct sioc_sg_req6 {
181 struct sockaddr_in6 src;
182 struct sockaddr_in6 grp;
183 u_quad_t pktcnt;
184 u_quad_t bytecnt;
185 u_quad_t wrong_if;
186 };
187
188 /*
189 * Argument structure used by mrouted to get mif pkt counts
190 */
191 struct sioc_mif_req6 {
192 mifi_t mifi; /* mif number */
193 u_quad_t icount; /* Input packet count on mif */
194 u_quad_t ocount; /* Output packet count on mif */
195 u_quad_t ibytes; /* Input byte count on mif */
196 u_quad_t obytes; /* Output byte count on mif */
197 };
198
199 /*
200 * Structure to export 'struct mif6' to userland via sysctl.
201 */
202 struct mif6_sctl {
203 u_char m6_flags; /* MIFF_ flags defined above */
204 u_int m6_rate_limit; /* max rate */
205 struct in6_addr m6_lcl_addr; /* local interface address */
206 uint32_t m6_ifp; /* interface index */
207 u_quad_t m6_pkt_in; /* # pkts in on interface */
208 u_quad_t m6_pkt_out; /* # pkts out on interface */
209 u_quad_t m6_bytes_in; /* # bytes in on interface */
210 u_quad_t m6_bytes_out; /* # bytes out on interface */
211 };
212
213 #if defined(_KERNEL) || defined(KERNEL)
214 /*
215 * The kernel's multicast-interface structure.
216 */
217 struct mif6 {
218 u_char m6_flags; /* MIFF_ flags defined above */
219 u_int m6_rate_limit; /* max rate */
220 struct in6_addr m6_lcl_addr; /* local interface address */
221 struct ifnet *m6_ifp; /* pointer to interface */
222 u_quad_t m6_pkt_in; /* # pkts in on interface */
223 u_quad_t m6_pkt_out; /* # pkts out on interface */
224 u_quad_t m6_bytes_in; /* # bytes in on interface */
225 u_quad_t m6_bytes_out; /* # bytes out on interface */
226 #ifdef notyet
227 u_int m6_rsvp_on; /* RSVP listening on this vif */
228 struct socket *m6_rsvpd; /* RSVP daemon socket */
229 #endif
230 };
231
232 /*
233 * The kernel's multicast forwarding cache entry structure
234 */
235 struct mf6c {
236 struct sockaddr_in6 mf6c_origin; /* IPv6 origin of mcasts */
237 struct sockaddr_in6 mf6c_mcastgrp; /* multicast group associated*/
238 mifi_t mf6c_parent; /* incoming IF */
239 struct if_set mf6c_ifset; /* set of outgoing IFs */
240
241 u_quad_t mf6c_pkt_cnt; /* pkt count for src-grp */
242 u_quad_t mf6c_byte_cnt; /* byte count for src-grp */
243 u_quad_t mf6c_wrong_if; /* wrong if for src-grp */
244 int mf6c_expire; /* time to clean entry up */
245 struct timeval mf6c_last_assert; /* last time I sent an assert*/
246 struct rtdetq *mf6c_stall; /* pkts waiting for route */
247 struct mf6c *mf6c_next; /* hash table linkage */
248 };
249
250 #define MF6C_INCOMPLETE_PARENT ((mifi_t)-1)
251
252 /*
253 * Argument structure used for pkt info. while upcall is made
254 */
255 #ifndef _NETINET_IP_MROUTE_H_
256 struct rtdetq { /* XXX: rtdetq is also defined in ip_mroute.h */
257 struct mbuf *m; /* A copy of the packet */
258 struct ifnet *ifp; /* Interface pkt came in on */
259 #ifdef UPCALL_TIMING
260 struct timeval t; /* Timestamp */
261 #endif /* UPCALL_TIMING */
262 struct rtdetq *next;
263 };
264 #endif /* _NETINET_IP_MROUTE_H_ */
265
266 #define MF6CTBLSIZ 256
267 #if (MF6CTBLSIZ & (MF6CTBLSIZ - 1)) == 0 /* from sys:route.h */
268 #define MF6CHASHMOD(h) ((h) & (MF6CTBLSIZ - 1))
269 #else
270 #define MF6CHASHMOD(h) ((h) % MF6CTBLSIZ)
271 #endif
272
273 #define MAX_UPQ6 4 /* max. no of pkts in upcall Q */
274
275 extern int (*ip6_mrouter_set)(struct socket *so, struct sockopt *sopt);
276 extern int (*ip6_mrouter_get)(struct socket *so, struct sockopt *sopt);
277 extern int (*ip6_mrouter_done)(void);
278 extern int (*mrt6_ioctl)(u_long, caddr_t);
279 #endif /* _KERNEL */
280
281 #endif /* !_NETINET6_IP6_MROUTE_H_ */
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