2 * Copyright (c) 1989 Stephen Deering.
3 * Copyright (c) 1992, 1993
4 * The Regents of the University of California. All rights reserved.
6 * This code is derived from software contributed to Berkeley by
7 * Stephen Deering of Stanford University.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)ip_mroute.h 8.1 (Berkeley) 6/10/93
37 #ifndef _NETINET_IP_MROUTE_H_
38 #define _NETINET_IP_MROUTE_H_
41 * Definitions for IP multicast forwarding.
43 * Written by David Waitzman, BBN Labs, August 1988.
44 * Modified by Steve Deering, Stanford, February 1989.
45 * Modified by Ajit Thyagarajan, PARC, August 1993.
46 * Modified by Ajit Thyagarajan, PARC, August 1994.
47 * Modified by Ahmed Helmy, SGI, June 1996.
48 * Modified by Pavlin Radoslavov, ICSI, October 2002.
50 * MROUTING Revision: 3.3.1.3
51 * and PIM-SMv2 and PIM-DM support, advanced API support,
52 * bandwidth metering and signaling.
56 * Multicast Routing set/getsockopt commands.
58 #define MRT_INIT 100 /* initialize forwarder */
59 #define MRT_DONE 101 /* shut down forwarder */
60 #define MRT_ADD_VIF 102 /* create virtual interface */
61 #define MRT_DEL_VIF 103 /* delete virtual interface */
62 #define MRT_ADD_MFC 104 /* insert forwarding cache entry */
63 #define MRT_DEL_MFC 105 /* delete forwarding cache entry */
64 #define MRT_VERSION 106 /* get kernel version number */
65 #define MRT_ASSERT 107 /* enable assert processing */
66 #define MRT_PIM MRT_ASSERT /* enable PIM processing */
67 #define MRT_API_SUPPORT 109 /* supported MRT API */
68 #define MRT_API_CONFIG 110 /* config MRT API */
69 #define MRT_ADD_BW_UPCALL 111 /* create bandwidth monitor */
70 #define MRT_DEL_BW_UPCALL 112 /* delete bandwidth monitor */
73 * Types and macros for handling bitmaps with one bit per virtual interface.
76 typedef u_long vifbitmap_t;
77 typedef u_short vifi_t; /* type of a vif index */
78 #define ALL_VIFS (vifi_t)-1
80 #define VIFM_SET(n, m) ((m) |= (1 << (n)))
81 #define VIFM_CLR(n, m) ((m) &= ~(1 << (n)))
82 #define VIFM_ISSET(n, m) ((m) & (1 << (n)))
83 #define VIFM_CLRALL(m) ((m) = 0x00000000)
84 #define VIFM_COPY(mfrom, mto) ((mto) = (mfrom))
85 #define VIFM_SAME(m1, m2) ((m1) == (m2))
90 * Argument structure for MRT_ADD_VIF.
91 * (MRT_DEL_VIF takes a single vifi_t argument.)
94 vifi_t vifc_vifi; /* the index of the vif to be added */
95 u_char vifc_flags; /* VIFF_ flags defined below */
96 u_char vifc_threshold; /* min ttl required to forward on vif */
97 u_int vifc_rate_limit; /* max rate */
98 struct in_addr vifc_lcl_addr; /* local interface address */
99 struct in_addr vifc_rmt_addr; /* remote address (tunnels only) */
102 #define VIFF_TUNNEL 0x1 /* no-op; retained for old source */
103 #define VIFF_SRCRT 0x2 /* no-op; retained for old source */
104 #define VIFF_REGISTER 0x4 /* used for PIM Register encap/decap */
107 * Argument structure for MRT_ADD_MFC and MRT_DEL_MFC
108 * XXX if you change this, make sure to change struct mfcctl2 as well.
111 struct in_addr mfcc_origin; /* ip origin of mcasts */
112 struct in_addr mfcc_mcastgrp; /* multicast group associated*/
113 vifi_t mfcc_parent; /* incoming vif */
114 u_char mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
118 * The new argument structure for MRT_ADD_MFC and MRT_DEL_MFC overlays
119 * and extends the old struct mfcctl.
122 /* the mfcctl fields */
123 struct in_addr mfcc_origin; /* ip origin of mcasts */
124 struct in_addr mfcc_mcastgrp; /* multicast group associated*/
125 vifi_t mfcc_parent; /* incoming vif */
126 u_char mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
128 /* extension fields */
129 uint8_t mfcc_flags[MAXVIFS]; /* the MRT_MFC_FLAGS_* flags */
130 struct in_addr mfcc_rp; /* the RP address */
133 * The advanced-API flags.
135 * The MRT_MFC_FLAGS_XXX API flags are also used as flags
136 * for the mfcc_flags field.
138 #define MRT_MFC_FLAGS_DISABLE_WRONGVIF (1 << 0) /* disable WRONGVIF signals */
139 #define MRT_MFC_FLAGS_BORDER_VIF (1 << 1) /* border vif */
140 #define MRT_MFC_RP (1 << 8) /* enable RP address */
141 #define MRT_MFC_BW_UPCALL (1 << 9) /* enable bw upcalls */
142 #define MRT_MFC_FLAGS_ALL (MRT_MFC_FLAGS_DISABLE_WRONGVIF | \
143 MRT_MFC_FLAGS_BORDER_VIF)
144 #define MRT_API_FLAGS_ALL (MRT_MFC_FLAGS_ALL | \
149 * Structure for installing or delivering an upcall if the
150 * measured bandwidth is above or below a threshold.
152 * User programs (e.g. daemons) may have a need to know when the
153 * bandwidth used by some data flow is above or below some threshold.
154 * This interface allows the userland to specify the threshold (in
155 * bytes and/or packets) and the measurement interval. Flows are
156 * all packet with the same source and destination IP address.
157 * At the moment the code is only used for multicast destinations
158 * but there is nothing that prevents its use for unicast.
160 * The measurement interval cannot be shorter than some Tmin (currently, 3s).
161 * The threshold is set in packets and/or bytes per_interval.
163 * Measurement works as follows:
165 * For >= measurements:
166 * The first packet marks the start of a measurement interval.
167 * During an interval we count packets and bytes, and when we
168 * pass the threshold we deliver an upcall and we are done.
169 * The first packet after the end of the interval resets the
170 * count and restarts the measurement.
172 * For <= measurement:
173 * We start a timer to fire at the end of the interval, and
174 * then for each incoming packet we count packets and bytes.
175 * When the timer fires, we compare the value with the threshold,
176 * schedule an upcall if we are below, and restart the measurement
177 * (reschedule timer and zero counters).
181 struct timeval b_time;
187 struct in_addr bu_src; /* source address */
188 struct in_addr bu_dst; /* destination address */
189 uint32_t bu_flags; /* misc flags (see below) */
190 #define BW_UPCALL_UNIT_PACKETS (1 << 0) /* threshold (in packets) */
191 #define BW_UPCALL_UNIT_BYTES (1 << 1) /* threshold (in bytes) */
192 #define BW_UPCALL_GEQ (1 << 2) /* upcall if bw >= threshold */
193 #define BW_UPCALL_LEQ (1 << 3) /* upcall if bw <= threshold */
194 #define BW_UPCALL_DELETE_ALL (1 << 4) /* delete all upcalls for s,d*/
195 struct bw_data bu_threshold; /* the bw threshold */
196 struct bw_data bu_measured; /* the measured bw */
199 /* max. number of upcalls to deliver together */
200 #define BW_UPCALLS_MAX 128
201 /* min. threshold time interval for bandwidth measurement */
202 #define BW_UPCALL_THRESHOLD_INTERVAL_MIN_SEC 3
203 #define BW_UPCALL_THRESHOLD_INTERVAL_MIN_USEC 0
206 * The kernel's multicast routing statistics.
209 u_long mrts_mfc_lookups; /* # forw. cache hash table hits */
210 u_long mrts_mfc_misses; /* # forw. cache hash table misses */
211 u_long mrts_upcalls; /* # calls to multicast routing daemon */
212 u_long mrts_no_route; /* no route for packet's origin */
213 u_long mrts_bad_tunnel; /* malformed tunnel options */
214 u_long mrts_cant_tunnel; /* no room for tunnel options */
215 u_long mrts_wrong_if; /* arrived on wrong interface */
216 u_long mrts_upq_ovflw; /* upcall Q overflow */
217 u_long mrts_cache_cleanups; /* # entries with no upcalls */
218 u_long mrts_drop_sel; /* pkts dropped selectively */
219 u_long mrts_q_overflow; /* pkts dropped - Q overflow */
220 u_long mrts_pkt2large; /* pkts dropped - size > BKT SIZE */
221 u_long mrts_upq_sockfull; /* upcalls dropped - socket full */
225 #define MRTSTAT_ADD(name, val) V_mrtstat.name += (val)
226 #define MRTSTAT_INC(name) MRTSTAT_ADD(name, 1)
230 * Argument structure used by mrouted to get src-grp pkt counts
241 * Argument structure used by mrouted to get vif pkt counts
243 struct sioc_vif_req {
244 vifi_t vifi; /* vif number */
245 u_long icount; /* Input packet count on vif */
246 u_long ocount; /* Output packet count on vif */
247 u_long ibytes; /* Input byte count on vif */
248 u_long obytes; /* Output byte count on vif */
253 * The kernel's virtual-interface structure.
256 u_char v_flags; /* VIFF_ flags defined above */
257 u_char v_threshold; /* min ttl required to forward on vif*/
258 struct in_addr v_lcl_addr; /* local interface address */
259 struct in_addr v_rmt_addr; /* remote address (tunnels only) */
260 struct ifnet *v_ifp; /* pointer to interface */
261 u_long v_pkt_in; /* # pkts in on interface */
262 u_long v_pkt_out; /* # pkts out on interface */
263 u_long v_bytes_in; /* # bytes in on interface */
264 u_long v_bytes_out; /* # bytes out on interface */
265 struct route v_route; /* cached route */
270 * The kernel's multicast forwarding cache entry structure
273 LIST_ENTRY(mfc) mfc_hash;
274 struct in_addr mfc_origin; /* IP origin of mcasts */
275 struct in_addr mfc_mcastgrp; /* multicast group associated*/
276 vifi_t mfc_parent; /* incoming vif */
277 u_char mfc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
278 u_long mfc_pkt_cnt; /* pkt count for src-grp */
279 u_long mfc_byte_cnt; /* byte count for src-grp */
280 u_long mfc_wrong_if; /* wrong if for src-grp */
281 int mfc_expire; /* time to clean entry up */
282 struct timeval mfc_last_assert; /* last time I sent an assert*/
283 uint8_t mfc_flags[MAXVIFS]; /* the MRT_MFC_FLAGS_* flags */
284 struct in_addr mfc_rp; /* the RP address */
285 struct bw_meter *mfc_bw_meter; /* list of bandwidth meters */
286 u_long mfc_nstall; /* # of packets awaiting mfc */
287 TAILQ_HEAD(, rtdetq) mfc_stall; /* q of packets awaiting mfc */
292 * Struct used to communicate from kernel to multicast router
293 * note the convenient similarity to an IP packet
298 u_char im_msgtype; /* what type of message */
299 #define IGMPMSG_NOCACHE 1 /* no MFC in the kernel */
300 #define IGMPMSG_WRONGVIF 2 /* packet came from wrong interface */
301 #define IGMPMSG_WHOLEPKT 3 /* PIM pkt for user level encap. */
302 #define IGMPMSG_BW_UPCALL 4 /* BW monitoring upcall */
303 u_char im_mbz; /* must be zero */
304 u_char im_vif; /* vif rec'd on */
306 struct in_addr im_src, im_dst;
311 * Argument structure used for pkt info. while upcall is made
314 TAILQ_ENTRY(rtdetq) rte_link;
315 struct mbuf *m; /* A copy of the packet */
316 struct ifnet *ifp; /* Interface pkt came in on */
317 vifi_t xmt_vif; /* Saved copy of imo_multicast_vif */
319 #define MAX_UPQ 4 /* max. no of pkts in upcall Q */
323 * Structure for measuring the bandwidth and sending an upcall if the
324 * measured bandwidth is above or below a threshold.
327 struct bw_meter *bm_mfc_next; /* next bw meter (same mfc) */
328 struct bw_meter *bm_time_next; /* next bw meter (same time) */
329 uint32_t bm_time_hash; /* the time hash value */
330 struct mfc *bm_mfc; /* the corresponding mfc */
331 uint32_t bm_flags; /* misc flags (see below) */
332 #define BW_METER_UNIT_PACKETS (1 << 0) /* threshold (in packets) */
333 #define BW_METER_UNIT_BYTES (1 << 1) /* threshold (in bytes) */
334 #define BW_METER_GEQ (1 << 2) /* upcall if bw >= threshold */
335 #define BW_METER_LEQ (1 << 3) /* upcall if bw <= threshold */
336 #define BW_METER_USER_FLAGS (BW_METER_UNIT_PACKETS | \
337 BW_METER_UNIT_BYTES | \
341 #define BW_METER_UPCALL_DELIVERED (1 << 24) /* upcall was delivered */
343 struct bw_data bm_threshold; /* the upcall threshold */
344 struct bw_data bm_measured; /* the measured bw */
345 struct timeval bm_start_time; /* abs. time */
352 extern int (*ip_mrouter_set)(struct socket *, struct sockopt *);
353 extern int (*ip_mrouter_get)(struct socket *, struct sockopt *);
354 extern int (*ip_mrouter_done)(void);
355 extern int (*mrt_ioctl)(u_long, caddr_t, int);
359 #endif /* _NETINET_IP_MROUTE_H_ */