1 /* $NetBSD: ip_mroute.h,v 1.28 2007/07/09 21:11:11 ad Exp $ */ 2 3 #ifndef _NETINET_IP_MROUTE_H_ 4 #define _NETINET_IP_MROUTE_H_ 5 6 /* 7 * Definitions for IP multicast forwarding. 8 * 9 * Written by David Waitzman, BBN Labs, August 1988. 10 * Modified by Steve Deering, Stanford, February 1989. 11 * Modified by Ajit Thyagarajan, PARC, August 1993. 12 * Modified by Ajit Thyagarajan, PARC, August 1994. 13 * Modified by Ahmed Helmy, SGI, June 1996. 14 * Modified by Pavlin Radoslavov, ICSI, October 2002. 15 * 16 * MROUTING Revision: 1.2 17 * and PIM-SMv2 and PIM-DM support, advanced API support, 18 * bandwidth metering and signaling. 19 */ 20 21 #include <sys/queue.h> 22 #include <sys/callout.h> 23 24 /* 25 * Multicast Routing set/getsockopt commands. 26 */ 27 #define MRT_INIT 100 /* initialize forwarder */ 28 #define MRT_DONE 101 /* shut down forwarder */ 29 #define MRT_ADD_VIF 102 /* create virtual interface */ 30 #define MRT_DEL_VIF 103 /* delete virtual interface */ 31 #define MRT_ADD_MFC 104 /* insert forwarding cache entry */ 32 #define MRT_DEL_MFC 105 /* delete forwarding cache entry */ 33 #define MRT_VERSION 106 /* get kernel version number */ 34 #define MRT_ASSERT 107 /* enable assert processing */ 35 #define MRT_PIM MRT_ASSERT /* enable PIM processing */ 36 #define MRT_API_SUPPORT 109 /* supported MRT API */ 37 #define MRT_API_CONFIG 110 /* config MRT API */ 38 #define MRT_ADD_BW_UPCALL 111 /* create bandwidth monitor */ 39 #define MRT_DEL_BW_UPCALL 112 /* delete bandwidth monitor */ 40 41 42 /* 43 * Types and macros for handling bitmaps with one bit per virtual interface. 44 */ 45 #define MAXVIFS 32 46 typedef u_int32_t vifbitmap_t; 47 typedef u_int16_t vifi_t; /* type of a vif index */ 48 49 #define VIFM_SET(n, m) ((m) |= (1 << (n))) 50 #define VIFM_CLR(n, m) ((m) &= ~(1 << (n))) 51 #define VIFM_ISSET(n, m) ((m) & (1 << (n))) 52 #define VIFM_SETALL(m) ((m) = 0xffffffff) 53 #define VIFM_CLRALL(m) ((m) = 0x00000000) 54 #define VIFM_COPY(mfrom, mto) ((mto) = (mfrom)) 55 #define VIFM_SAME(m1, m2) ((m1) == (m2)) 56 57 #define VIFF_TUNNEL 0x1 /* vif represents a tunnel end-point */ 58 #define VIFF_SRCRT 0x2 /* tunnel uses IP src routing */ 59 #define VIFF_REGISTER 0x4 /* used for PIM Register encap/decap */ 60 61 /* 62 * Argument structure for MRT_ADD_VIF. 63 * (MRT_DEL_VIF takes a single vifi_t argument.) 64 */ 65 struct vifctl { 66 vifi_t vifc_vifi; /* the index of the vif to be added */ 67 u_int8_t vifc_flags; /* VIFF_ flags defined below */ 68 u_int8_t vifc_threshold; /* min ttl required to forward on vif */ 69 u_int32_t vifc_rate_limit; /* max rate */ 70 struct in_addr vifc_lcl_addr;/* local interface address */ 71 struct in_addr vifc_rmt_addr;/* remote address (tunnels only) */ 72 }; 73 74 /* 75 * Argument structure for MRT_ADD_MFC and MRT_DEL_MFC. 76 * XXX if you change this, make sure to change struct mfcctl2 as well. 77 */ 78 struct mfcctl { 79 struct in_addr mfcc_origin; /* ip origin of mcasts */ 80 struct in_addr mfcc_mcastgrp; /* multicast group associated */ 81 vifi_t mfcc_parent; /* incoming vif */ 82 u_int8_t mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */ 83 }; 84 85 /* 86 * The new argument structure for MRT_ADD_MFC and MRT_DEL_MFC overlays 87 * and extends the old struct mfcctl. 88 */ 89 struct mfcctl2 { 90 /* the mfcctl fields */ 91 struct in_addr mfcc_origin; /* ip origin of mcasts */ 92 struct in_addr mfcc_mcastgrp; /* multicast group associated*/ 93 vifi_t mfcc_parent; /* incoming vif */ 94 u_int8_t mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */ 95 96 /* extension fields */ 97 u_int8_t mfcc_flags[MAXVIFS]; /* the MRT_MFC_FLAGS_* flags */ 98 struct in_addr mfcc_rp; /* the RP address */ 99 }; 100 /* 101 * The advanced-API flags. 102 * 103 * The MRT_MFC_FLAGS_XXX API flags are also used as flags 104 * for the mfcc_flags field. 105 */ 106 #define MRT_MFC_FLAGS_DISABLE_WRONGVIF (1 << 0) /* disable WRONGVIF signals */ 107 #define MRT_MFC_FLAGS_BORDER_VIF (1 << 1) /* border vif */ 108 #define MRT_MFC_RP (1 << 8) /* enable RP address */ 109 #define MRT_MFC_BW_UPCALL (1 << 9) /* enable bw upcalls */ 110 #define MRT_MFC_FLAGS_ALL (MRT_MFC_FLAGS_DISABLE_WRONGVIF | \ 111 MRT_MFC_FLAGS_BORDER_VIF) 112 #define MRT_API_FLAGS_ALL (MRT_MFC_FLAGS_ALL | \ 113 MRT_MFC_RP | \ 114 MRT_MFC_BW_UPCALL) 115 116 /* 117 * Structure for installing or delivering an upcall if the 118 * measured bandwidth is above or below a threshold. 119 * 120 * User programs (e.g. daemons) may have a need to know when the 121 * bandwidth used by some data flow is above or below some threshold. 122 * This interface allows the userland to specify the threshold (in 123 * bytes and/or packets) and the measurement interval. Flows are 124 * all packet with the same source and destination IP address. 125 * At the moment the code is only used for multicast destinations 126 * but there is nothing that prevents its use for unicast. 127 * 128 * The measurement interval cannot be shorter than some Tmin (currently, 3s). 129 * The threshold is set in packets and/or bytes per_interval. 130 * 131 * Measurement works as follows: 132 * 133 * For >= measurements: 134 * The first packet marks the start of a measurement interval. 135 * During an interval we count packets and bytes, and when we 136 * pass the threshold we deliver an upcall and we are done. 137 * The first packet after the end of the interval resets the 138 * count and restarts the measurement. 139 * 140 * For <= measurement: 141 * We start a timer to fire at the end of the interval, and 142 * then for each incoming packet we count packets and bytes. 143 * When the timer fires, we compare the value with the threshold, 144 * schedule an upcall if we are below, and restart the measurement 145 * (reschedule timer and zero counters). 146 */ 147 148 struct bw_data { 149 struct timeval b_time; 150 u_int64_t b_packets; 151 u_int64_t b_bytes; 152 }; 153 154 struct bw_upcall { 155 struct in_addr bu_src; /* source address */ 156 struct in_addr bu_dst; /* destination address */ 157 u_int32_t bu_flags; /* misc flags (see below) */ 158 #define BW_UPCALL_UNIT_PACKETS (1 << 0) /* threshold (in packets) */ 159 #define BW_UPCALL_UNIT_BYTES (1 << 1) /* threshold (in bytes) */ 160 #define BW_UPCALL_GEQ (1 << 2) /* upcall if bw >= threshold */ 161 #define BW_UPCALL_LEQ (1 << 3) /* upcall if bw <= threshold */ 162 #define BW_UPCALL_DELETE_ALL (1 << 4) /* delete all upcalls for s,d*/ 163 struct bw_data bu_threshold; /* the bw threshold */ 164 struct bw_data bu_measured; /* the measured bw */ 165 }; 166 167 /* max. number of upcalls to deliver together */ 168 #define BW_UPCALLS_MAX 128 169 /* min. threshold time interval for bandwidth measurement */ 170 #define BW_UPCALL_THRESHOLD_INTERVAL_MIN_SEC 3 171 #define BW_UPCALL_THRESHOLD_INTERVAL_MIN_USEC 0 172 173 /* 174 * Argument structure used by mrouted to get src-grp pkt counts. 175 */ 176 struct sioc_sg_req { 177 struct in_addr src; 178 struct in_addr grp; 179 u_long pktcnt; 180 u_long bytecnt; 181 u_long wrong_if; 182 }; 183 184 /* 185 * Argument structure used by mrouted to get vif pkt counts. 186 */ 187 struct sioc_vif_req { 188 vifi_t vifi; /* vif number */ 189 u_long icount; /* input packet count on vif */ 190 u_long ocount; /* output packet count on vif */ 191 u_long ibytes; /* input byte count on vif */ 192 u_long obytes; /* output byte count on vif */ 193 }; 194 195 196 /* 197 * The kernel's multicast routing statistics. 198 */ 199 struct mrtstat { 200 u_long mrts_mfc_lookups; /* # forw. cache hash table hits */ 201 u_long mrts_mfc_misses; /* # forw. cache hash table misses */ 202 u_long mrts_upcalls; /* # calls to mrouted */ 203 u_long mrts_no_route; /* no route for packet's origin */ 204 u_long mrts_bad_tunnel; /* malformed tunnel options */ 205 u_long mrts_cant_tunnel; /* no room for tunnel options */ 206 u_long mrts_wrong_if; /* arrived on wrong interface */ 207 u_long mrts_upq_ovflw; /* upcall Q overflow */ 208 u_long mrts_cache_cleanups; /* # entries with no upcalls */ 209 u_long mrts_drop_sel; /* pkts dropped selectively */ 210 u_long mrts_q_overflow; /* pkts dropped - Q overflow */ 211 u_long mrts_pkt2large; /* pkts dropped - size > BKT SIZE */ 212 u_long mrts_upq_sockfull; /* upcalls dropped - socket full */ 213 }; 214 215 216 #ifdef _KERNEL 217 218 /* 219 * The kernel's virtual-interface structure. 220 */ 221 struct encaptab; 222 struct vif { 223 struct mbuf *tbf_q, **tbf_t; /* packet queue */ 224 struct timeval tbf_last_pkt_t; /* arr. time of last pkt */ 225 u_int32_t tbf_n_tok; /* no of tokens in bucket */ 226 u_int32_t tbf_q_len; /* length of queue at this vif */ 227 u_int32_t tbf_max_q_len; /* max. queue length */ 228 229 u_int8_t v_flags; /* VIFF_ flags defined above */ 230 u_int8_t v_threshold; /* min ttl required to forward on vif */ 231 u_int32_t v_rate_limit; /* max rate */ 232 struct in_addr v_lcl_addr; /* local interface address */ 233 struct in_addr v_rmt_addr; /* remote address (tunnels only) */ 234 struct ifnet *v_ifp; /* pointer to interface */ 235 u_long v_pkt_in; /* # pkts in on interface */ 236 u_long v_pkt_out; /* # pkts out on interface */ 237 u_long v_bytes_in; /* # bytes in on interface */ 238 u_long v_bytes_out; /* # bytes out on interface */ 239 struct route v_route; /* cached route if this is a tunnel */ 240 callout_t v_repq_ch; /* for tbf_reprocess_q() */ 241 #ifdef RSVP_ISI 242 int v_rsvp_on; /* # RSVP listening on this vif */ 243 struct socket *v_rsvpd; /* # RSVPD daemon */ 244 #endif /* RSVP_ISI */ 245 const struct encaptab *v_encap_cookie; 246 }; 247 248 /* 249 * The kernel's multicast forwarding cache entry structure. 250 * (A field for the type of service (mfc_tos) is to be added 251 * at a future point.) 252 */ 253 struct mfc { 254 LIST_ENTRY(mfc) mfc_hash; 255 struct in_addr mfc_origin; /* ip origin of mcasts */ 256 struct in_addr mfc_mcastgrp; /* multicast group associated */ 257 vifi_t mfc_parent; /* incoming vif */ 258 u_int8_t mfc_ttls[MAXVIFS]; /* forwarding ttls on vifs */ 259 u_long mfc_pkt_cnt; /* pkt count for src-grp */ 260 u_long mfc_byte_cnt; /* byte count for src-grp */ 261 u_long mfc_wrong_if; /* wrong if for src-grp */ 262 int mfc_expire; /* time to clean entry up */ 263 struct timeval mfc_last_assert; /* last time I sent an assert */ 264 struct rtdetq *mfc_stall; /* pkts waiting for route */ 265 u_int8_t mfc_flags[MAXVIFS]; /* the MRT_MFC_FLAGS_* flags */ 266 struct in_addr mfc_rp; /* the RP address */ 267 struct bw_meter *mfc_bw_meter; /* list of bandwidth meters */ 268 }; 269 270 /* 271 * Structure used to communicate from kernel to multicast router. 272 * (Note the convenient similarity to an IP packet.) 273 */ 274 struct igmpmsg { 275 u_int32_t unused1; 276 u_int32_t unused2; 277 u_int8_t im_msgtype; /* what type of message */ 278 #define IGMPMSG_NOCACHE 1 /* no MFC in the kernel */ 279 #define IGMPMSG_WRONGVIF 2 /* packet came from wrong interface */ 280 #define IGMPMSG_WHOLEPKT 3 /* PIM pkt for user level encap. */ 281 #define IGMPMSG_BW_UPCALL 4 /* BW monitoring upcall */ 282 u_int8_t im_mbz; /* must be zero */ 283 u_int8_t im_vif; /* vif rec'd on */ 284 u_int8_t unused3; 285 struct in_addr im_src, im_dst; 286 } __attribute__((__packed__)); 287 288 /* 289 * Argument structure used for pkt info. while upcall is made. 290 */ 291 struct rtdetq { 292 struct mbuf *m; /* a copy of the packet */ 293 struct ifnet *ifp; /* interface pkt came in on */ 294 #ifdef UPCALL_TIMING 295 struct timeval t; /* timestamp */ 296 #endif /* UPCALL_TIMING */ 297 struct rtdetq *next; 298 }; 299 300 #define MFCTBLSIZ 256 301 #define MAX_UPQ 4 /* max. no of pkts in upcall Q */ 302 303 /* 304 * Token bucket filter code 305 */ 306 #define MAX_BKT_SIZE 10000 /* 10K bytes size */ 307 #define MAXQSIZE 10 /* max. no of pkts in token queue */ 308 309 /* 310 * Structure for measuring the bandwidth and sending an upcall if the 311 * measured bandwidth is above or below a threshold. 312 */ 313 struct bw_meter { 314 struct bw_meter *bm_mfc_next; /* next bw meter (same mfc) */ 315 struct bw_meter *bm_time_next; /* next bw meter (same time) */ 316 uint32_t bm_time_hash; /* the time hash value */ 317 struct mfc *bm_mfc; /* the corresponding mfc */ 318 uint32_t bm_flags; /* misc flags (see below) */ 319 #define BW_METER_UNIT_PACKETS (1 << 0) /* threshold (in packets) */ 320 #define BW_METER_UNIT_BYTES (1 << 1) /* threshold (in bytes) */ 321 #define BW_METER_GEQ (1 << 2) /* upcall if bw >= threshold */ 322 #define BW_METER_LEQ (1 << 3) /* upcall if bw <= threshold */ 323 #define BW_METER_USER_FLAGS (BW_METER_UNIT_PACKETS | \ 324 BW_METER_UNIT_BYTES | \ 325 BW_METER_GEQ | \ 326 BW_METER_LEQ) 327 328 #define BW_METER_UPCALL_DELIVERED (1 << 24) /* upcall was delivered */ 329 330 struct bw_data bm_threshold; /* the upcall threshold */ 331 struct bw_data bm_measured; /* the measured bw */ 332 struct timeval bm_start_time; /* abs. time */ 333 }; 334 335 int ip_mrouter_set(struct socket *, int, struct mbuf **); 336 int ip_mrouter_get(struct socket *, int, struct mbuf **); 337 int mrt_ioctl(struct socket *, u_long, void *); 338 int ip_mrouter_done(void); 339 void ip_mrouter_detach(struct ifnet *); 340 void reset_vif(struct vif *); 341 #ifdef RSVP_ISI 342 int ip_mforward(struct mbuf *, struct ifnet *, struct ip_moptions *); 343 int legal_vif_num(int); 344 int ip_rsvp_vif_init(struct socket *, struct mbuf *); 345 int ip_rsvp_vif_done(struct socket *, struct mbuf *); 346 void ip_rsvp_force_done(struct socket *); 347 void rsvp_input(struct mbuf *, int, int); 348 #else 349 int ip_mforward(struct mbuf *, struct ifnet *); 350 #endif 351 352 #endif /* _KERNEL */ 353 354 #endif /* !_NETINET_IP_MROUTE_H_ */ 355