1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989 Stephen Deering. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Stephen Deering of Stanford University. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef _NETINET_IP_MROUTE_H_ 37 #define _NETINET_IP_MROUTE_H_ 38 39 /* 40 * Definitions for IP multicast forwarding. 41 * 42 * Written by David Waitzman, BBN Labs, August 1988. 43 * Modified by Steve Deering, Stanford, February 1989. 44 * Modified by Ajit Thyagarajan, PARC, August 1993. 45 * Modified by Ajit Thyagarajan, PARC, August 1994. 46 * Modified by Ahmed Helmy, SGI, June 1996. 47 * Modified by Pavlin Radoslavov, ICSI, October 2002. 48 * 49 * MROUTING Revision: 3.3.1.3 50 * and PIM-SMv2 and PIM-DM support, advanced API support, 51 * bandwidth metering and signaling. 52 */ 53 54 /* 55 * Multicast Routing set/getsockopt commands. 56 */ 57 #define MRT_INIT 100 /* initialize forwarder */ 58 #define MRT_DONE 101 /* shut down forwarder */ 59 #define MRT_ADD_VIF 102 /* create virtual interface */ 60 #define MRT_DEL_VIF 103 /* delete virtual interface */ 61 #define MRT_ADD_MFC 104 /* insert forwarding cache entry */ 62 #define MRT_DEL_MFC 105 /* delete forwarding cache entry */ 63 #define MRT_VERSION 106 /* get kernel version number */ 64 #define MRT_ASSERT 107 /* enable assert processing */ 65 #define MRT_PIM MRT_ASSERT /* enable PIM processing */ 66 #define MRT_API_SUPPORT 109 /* supported MRT API */ 67 #define MRT_API_CONFIG 110 /* config MRT API */ 68 #define MRT_ADD_BW_UPCALL 111 /* create bandwidth monitor */ 69 #define MRT_DEL_BW_UPCALL 112 /* delete bandwidth monitor */ 70 71 /* 72 * Types and macros for handling bitmaps with one bit per virtual interface. 73 */ 74 #define MAXVIFS 32 75 typedef u_long vifbitmap_t; 76 typedef u_short vifi_t; /* type of a vif index */ 77 #define ALL_VIFS (vifi_t)-1 78 79 #define VIFM_SET(n, m) ((m) |= (1 << (n))) 80 #define VIFM_CLR(n, m) ((m) &= ~(1 << (n))) 81 #define VIFM_ISSET(n, m) ((m) & (1 << (n))) 82 #define VIFM_CLRALL(m) ((m) = 0x00000000) 83 #define VIFM_COPY(mfrom, mto) ((mto) = (mfrom)) 84 #define VIFM_SAME(m1, m2) ((m1) == (m2)) 85 86 struct mfc; 87 88 /* 89 * Argument structure for MRT_ADD_VIF. 90 * (MRT_DEL_VIF takes a single vifi_t argument.) 91 */ 92 struct vifctl { 93 vifi_t vifc_vifi; /* the index of the vif to be added */ 94 u_char vifc_flags; /* VIFF_ flags defined below */ 95 u_char vifc_threshold; /* min ttl required to forward on vif */ 96 u_int vifc_rate_limit; /* max rate */ 97 struct in_addr vifc_lcl_addr; /* local interface address */ 98 struct in_addr vifc_rmt_addr; /* remote address (tunnels only) */ 99 }; 100 101 #define VIFF_TUNNEL 0x1 /* no-op; retained for old source */ 102 #define VIFF_SRCRT 0x2 /* no-op; retained for old source */ 103 #define VIFF_REGISTER 0x4 /* used for PIM Register encap/decap */ 104 105 /* 106 * Argument structure for MRT_ADD_MFC and MRT_DEL_MFC 107 * XXX if you change this, make sure to change struct mfcctl2 as well. 108 */ 109 struct mfcctl { 110 struct in_addr mfcc_origin; /* ip origin of mcasts */ 111 struct in_addr mfcc_mcastgrp; /* multicast group associated*/ 112 vifi_t mfcc_parent; /* incoming vif */ 113 u_char mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */ 114 }; 115 116 /* 117 * The new argument structure for MRT_ADD_MFC and MRT_DEL_MFC overlays 118 * and extends the old struct mfcctl. 119 */ 120 struct mfcctl2 { 121 /* the mfcctl fields */ 122 struct in_addr mfcc_origin; /* ip origin of mcasts */ 123 struct in_addr mfcc_mcastgrp; /* multicast group associated*/ 124 vifi_t mfcc_parent; /* incoming vif */ 125 u_char mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */ 126 127 /* extension fields */ 128 uint8_t mfcc_flags[MAXVIFS]; /* the MRT_MFC_FLAGS_* flags */ 129 struct in_addr mfcc_rp; /* the RP address */ 130 }; 131 /* 132 * The advanced-API flags. 133 * 134 * The MRT_MFC_FLAGS_XXX API flags are also used as flags 135 * for the mfcc_flags field. 136 */ 137 #define MRT_MFC_FLAGS_DISABLE_WRONGVIF (1 << 0) /* disable WRONGVIF signals */ 138 #define MRT_MFC_FLAGS_BORDER_VIF (1 << 1) /* border vif */ 139 #define MRT_MFC_RP (1 << 8) /* enable RP address */ 140 #define MRT_MFC_BW_UPCALL (1 << 9) /* enable bw upcalls */ 141 #define MRT_MFC_FLAGS_ALL (MRT_MFC_FLAGS_DISABLE_WRONGVIF | \ 142 MRT_MFC_FLAGS_BORDER_VIF) 143 #define MRT_API_FLAGS_ALL (MRT_MFC_FLAGS_ALL | \ 144 MRT_MFC_RP | \ 145 MRT_MFC_BW_UPCALL) 146 147 /* 148 * Structure for installing or delivering an upcall if the 149 * measured bandwidth is above or below a threshold. 150 * 151 * User programs (e.g. daemons) may have a need to know when the 152 * bandwidth used by some data flow is above or below some threshold. 153 * This interface allows the userland to specify the threshold (in 154 * bytes and/or packets) and the measurement interval. Flows are 155 * all packet with the same source and destination IP address. 156 * At the moment the code is only used for multicast destinations 157 * but there is nothing that prevents its use for unicast. 158 * 159 * The measurement interval cannot be shorter than some Tmin (currently, 3s). 160 * The threshold is set in packets and/or bytes per_interval. 161 * 162 * Measurement works as follows: 163 * 164 * For >= measurements: 165 * The first packet marks the start of a measurement interval. 166 * During an interval we count packets and bytes, and when we 167 * pass the threshold we deliver an upcall and we are done. 168 * The first packet after the end of the interval resets the 169 * count and restarts the measurement. 170 * 171 * For <= measurement: 172 * We start a timer to fire at the end of the interval, and 173 * then for each incoming packet we count packets and bytes. 174 * When the timer fires, we compare the value with the threshold, 175 * schedule an upcall if we are below, and restart the measurement 176 * (reschedule timer and zero counters). 177 */ 178 179 struct bw_data { 180 struct timeval b_time; 181 uint64_t b_packets; 182 uint64_t b_bytes; 183 }; 184 185 struct bw_upcall { 186 struct in_addr bu_src; /* source address */ 187 struct in_addr bu_dst; /* destination address */ 188 uint32_t bu_flags; /* misc flags (see below) */ 189 #define BW_UPCALL_UNIT_PACKETS (1 << 0) /* threshold (in packets) */ 190 #define BW_UPCALL_UNIT_BYTES (1 << 1) /* threshold (in bytes) */ 191 #define BW_UPCALL_GEQ (1 << 2) /* upcall if bw >= threshold */ 192 #define BW_UPCALL_LEQ (1 << 3) /* upcall if bw <= threshold */ 193 #define BW_UPCALL_DELETE_ALL (1 << 4) /* delete all upcalls for s,d*/ 194 struct bw_data bu_threshold; /* the bw threshold */ 195 struct bw_data bu_measured; /* the measured bw */ 196 }; 197 198 /* max. number of upcalls to deliver together */ 199 #define BW_UPCALLS_MAX 1024 200 /* min. threshold time interval for bandwidth measurement */ 201 #define BW_UPCALL_THRESHOLD_INTERVAL_MIN_SEC 3 202 #define BW_UPCALL_THRESHOLD_INTERVAL_MIN_USEC 0 203 204 /* 205 * The kernel's multicast routing statistics. 206 */ 207 struct mrtstat { 208 uint64_t mrts_mfc_lookups; /* # forw. cache hash table hits */ 209 uint64_t mrts_mfc_misses; /* # forw. cache hash table misses */ 210 uint64_t mrts_upcalls; /* # calls to multicast routing daemon */ 211 uint64_t mrts_no_route; /* no route for packet's origin */ 212 uint64_t mrts_bad_tunnel; /* malformed tunnel options */ 213 uint64_t mrts_cant_tunnel; /* no room for tunnel options */ 214 uint64_t mrts_wrong_if; /* arrived on wrong interface */ 215 uint64_t mrts_upq_ovflw; /* upcall Q overflow */ 216 uint64_t mrts_cache_cleanups; /* # entries with no upcalls */ 217 uint64_t mrts_drop_sel; /* pkts dropped selectively */ 218 uint64_t mrts_q_overflow; /* pkts dropped - Q overflow */ 219 uint64_t mrts_pkt2large; /* pkts dropped - size > BKT SIZE */ 220 uint64_t mrts_upq_sockfull; /* upcalls dropped - socket full */ 221 }; 222 223 #ifdef _KERNEL 224 #define MRTSTAT_ADD(name, val) \ 225 VNET_PCPUSTAT_ADD(struct mrtstat, mrtstat, name, (val)) 226 #define MRTSTAT_INC(name) MRTSTAT_ADD(name, 1) 227 #endif 228 229 /* 230 * Argument structure used by mrouted to get src-grp pkt counts 231 */ 232 struct sioc_sg_req { 233 struct in_addr src; 234 struct in_addr grp; 235 u_long pktcnt; 236 u_long bytecnt; 237 u_long wrong_if; 238 }; 239 240 /* 241 * Argument structure used by mrouted to get vif pkt counts 242 */ 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 */ 249 }; 250 251 /* 252 * The kernel's virtual-interface structure. 253 */ 254 struct vif { 255 u_char v_flags; /* VIFF_ flags defined above */ 256 u_char v_threshold; /* min ttl required to forward on vif*/ 257 struct in_addr v_lcl_addr; /* local interface address */ 258 struct in_addr v_rmt_addr; /* remote address (tunnels only) */ 259 struct ifnet *v_ifp; /* pointer to interface */ 260 u_long v_pkt_in; /* # pkts in on interface */ 261 u_long v_pkt_out; /* # pkts out on interface */ 262 u_long v_bytes_in; /* # bytes in on interface */ 263 u_long v_bytes_out; /* # bytes out on interface */ 264 #ifdef _KERNEL 265 #define MROUTE_VIF_SYSCTL_LEN __offsetof(struct vif, v_spin) 266 struct mtx v_spin; /* Spin mutex for pkt stats */ 267 char v_spin_name[32]; 268 #endif 269 }; 270 271 #if defined(_KERNEL) || defined (_NETSTAT) 272 /* 273 * The kernel's multicast forwarding cache entry structure 274 */ 275 struct mfc { 276 LIST_ENTRY(mfc) mfc_hash; 277 struct in_addr mfc_origin; /* IP origin of mcasts */ 278 struct in_addr mfc_mcastgrp; /* multicast group associated*/ 279 vifi_t mfc_parent; /* incoming vif */ 280 u_char mfc_ttls[MAXVIFS]; /* forwarding ttls on vifs */ 281 u_long mfc_pkt_cnt; /* pkt count for src-grp */ 282 u_long mfc_byte_cnt; /* byte count for src-grp */ 283 u_long mfc_wrong_if; /* wrong if for src-grp */ 284 int mfc_expire; /* time to clean entry up */ 285 struct timeval mfc_last_assert; /* last time I sent an assert*/ 286 uint8_t mfc_flags[MAXVIFS]; /* the MRT_MFC_FLAGS_* flags */ 287 struct in_addr mfc_rp; /* the RP address */ 288 struct bw_meter *mfc_bw_meter_leq; /* list of bandwidth meters 289 for Lower-or-EQual case */ 290 struct bw_meter *mfc_bw_meter_geq; /* list of bandwidth meters 291 for Greater-or-EQual case */ 292 struct buf_ring *mfc_stall_ring; /* ring of awaiting mfc */ 293 }; 294 #endif /* _KERNEL */ 295 296 /* 297 * Struct used to communicate from kernel to multicast router 298 * note the convenient similarity to an IP packet 299 */ 300 struct igmpmsg { 301 uint32_t unused1; 302 uint32_t unused2; 303 u_char im_msgtype; /* what type of message */ 304 #define IGMPMSG_NOCACHE 1 /* no MFC in the kernel */ 305 #define IGMPMSG_WRONGVIF 2 /* packet came from wrong interface */ 306 #define IGMPMSG_WHOLEPKT 3 /* PIM pkt for user level encap. */ 307 #define IGMPMSG_BW_UPCALL 4 /* BW monitoring upcall */ 308 u_char im_mbz; /* must be zero */ 309 u_char im_vif; /* vif rec'd on */ 310 u_char unused3; 311 struct in_addr im_src, im_dst; 312 }; 313 314 #ifdef _KERNEL 315 /* 316 * Argument structure used for pkt info. while upcall is made 317 */ 318 struct rtdetq { 319 TAILQ_ENTRY(rtdetq) rte_link; 320 struct mbuf *m; /* A copy of the packet */ 321 struct ifnet *ifp; /* Interface pkt came in on */ 322 vifi_t xmt_vif; /* Saved copy of imo_multicast_vif */ 323 }; 324 #define MAX_UPQ 4 /* max. no of pkts in upcall Q */ 325 #endif /* _KERNEL */ 326 327 /* 328 * Structure for measuring the bandwidth and sending an upcall if the 329 * measured bandwidth is above or below a threshold. 330 */ 331 struct bw_meter { 332 struct bw_meter *bm_mfc_next; /* next bw meter (same mfc) */ 333 struct bw_meter *bm_time_next; /* next bw meter (same time) */ 334 struct mfc *bm_mfc; /* the corresponding mfc */ 335 uint32_t bm_flags; /* misc flags (see below) */ 336 #define BW_METER_UNIT_PACKETS (1 << 0) /* threshold (in packets) */ 337 #define BW_METER_UNIT_BYTES (1 << 1) /* threshold (in bytes) */ 338 #define BW_METER_GEQ (1 << 2) /* upcall if bw >= threshold */ 339 #define BW_METER_LEQ (1 << 3) /* upcall if bw <= threshold */ 340 #define BW_METER_USER_FLAGS (BW_METER_UNIT_PACKETS | \ 341 BW_METER_UNIT_BYTES | \ 342 BW_METER_GEQ | \ 343 BW_METER_LEQ) 344 345 #define BW_METER_UPCALL_DELIVERED (1 << 24) /* upcall was delivered */ 346 347 struct bw_data bm_threshold; /* the upcall threshold */ 348 struct bw_data bm_measured; /* the measured bw */ 349 struct timeval bm_start_time; /* abs. time */ 350 #ifdef _KERNEL 351 struct callout bm_meter_callout; /* Periodic callout */ 352 void* arg; /* custom argument */ 353 struct mtx bm_spin; /* meter spin lock */ 354 char bm_spin_name[32]; 355 #endif 356 }; 357 358 #ifdef _KERNEL 359 360 struct sockopt; 361 362 extern int (*ip_mrouter_set)(struct socket *, struct sockopt *); 363 extern int (*ip_mrouter_get)(struct socket *, struct sockopt *); 364 extern int (*ip_mrouter_done)(void); 365 extern int (*mrt_ioctl)(u_long, caddr_t, int); 366 367 #endif /* _KERNEL */ 368 369 #endif /* _NETINET_IP_MROUTE_H_ */ 370