ip_mroute.h revision 1.9
1 /* $NetBSD: ip_mroute.h,v 1.9 1995/05/31 21:50:43 mycroft Exp $ */ 2 3 /* 4 * Definitions for IP multicast forwarding. 5 * 6 * Written by David Waitzman, BBN Labs, August 1988. 7 * Modified by Steve Deering, Stanford, February 1989. 8 * Modified by Ajit Thyagarajan, PARC, August 1993. 9 * Modified by Ajit Thyagarajan, PARC, August 1994. 10 * 11 * MROUTING Revision: 1.2 12 */ 13 14 #include <sys/queue.h> 15 16 /* 17 * Multicast Routing set/getsockopt commands. 18 */ 19 #define MRT_INIT 100 /* initialize forwarder */ 20 #define MRT_DONE 101 /* shut down forwarder */ 21 #define MRT_ADD_VIF 102 /* create virtual interface */ 22 #define MRT_DEL_VIF 103 /* delete virtual interface */ 23 #define MRT_ADD_MFC 104 /* insert forwarding cache entry */ 24 #define MRT_DEL_MFC 105 /* delete forwarding cache entry */ 25 #define MRT_VERSION 106 /* get kernel version number */ 26 #define MRT_ASSERT 107 /* enable PIM assert processing */ 27 28 29 /* 30 * Types and macros for handling bitmaps with one bit per virtual interface. 31 */ 32 #define MAXVIFS 32 33 typedef u_int32_t vifbitmap_t; 34 typedef u_int16_t vifi_t; /* type of a vif index */ 35 36 #define VIFM_SET(n, m) ((m) |= (1 << (n))) 37 #define VIFM_CLR(n, m) ((m) &= ~(1 << (n))) 38 #define VIFM_ISSET(n, m) ((m) & (1 << (n))) 39 #define VIFM_SETALL(m) ((m) = 0xffffffff) 40 #define VIFM_CLRALL(m) ((m) = 0x00000000) 41 #define VIFM_COPY(mfrom, mto) ((mto) = (mfrom)) 42 #define VIFM_SAME(m1, m2) ((m1) == (m2)) 43 44 #define VIFF_TUNNEL 0x1 /* vif represents a tunnel end-point */ 45 #define VIFF_SRCRT 0x2 /* tunnel uses IP src routing */ 46 47 /* 48 * Argument structure for MRT_ADD_VIF. 49 * (MRT_DEL_VIF takes a single vifi_t argument.) 50 */ 51 struct vifctl { 52 vifi_t vifc_vifi; /* the index of the vif to be added */ 53 u_int8_t vifc_flags; /* VIFF_ flags defined below */ 54 u_int8_t vifc_threshold; /* min ttl required to forward on vif */ 55 u_int32_t vifc_rate_limit; /* max rate */ 56 struct in_addr vifc_lcl_addr;/* local interface address */ 57 struct in_addr vifc_rmt_addr;/* remote address (tunnels only) */ 58 }; 59 60 /* 61 * Argument structure for MRT_ADD_MFC and MRT_DEL_MFC. 62 * (mfcc_tos to be added at a future point) 63 */ 64 struct mfcctl { 65 struct in_addr mfcc_origin; /* ip origin of mcasts */ 66 struct in_addr mfcc_mcastgrp; /* multicast group associated */ 67 vifi_t mfcc_parent; /* incoming vif */ 68 u_int8_t mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */ 69 }; 70 71 /* 72 * Argument structure used by mrouted to get src-grp pkt counts. 73 */ 74 struct sioc_sg_req { 75 struct in_addr src; 76 struct in_addr grp; 77 u_long pktcnt; 78 u_long bytecnt; 79 u_long wrong_if; 80 }; 81 82 /* 83 * Argument structure used by mrouted to get vif pkt counts. 84 */ 85 struct sioc_vif_req { 86 vifi_t vifi; /* vif number */ 87 u_long icount; /* input packet count on vif */ 88 u_long ocount; /* output packet count on vif */ 89 u_long ibytes; /* input byte count on vif */ 90 u_long obytes; /* output byte count on vif */ 91 }; 92 93 94 /* 95 * The kernel's multicast routing statistics. 96 */ 97 struct mrtstat { 98 u_long mrts_mfc_lookups; /* # forw. cache hash table hits */ 99 u_long mrts_mfc_misses; /* # forw. cache hash table misses */ 100 u_long mrts_upcalls; /* # calls to mrouted */ 101 u_long mrts_no_route; /* no route for packet's origin */ 102 u_long mrts_bad_tunnel; /* malformed tunnel options */ 103 u_long mrts_cant_tunnel; /* no room for tunnel options */ 104 u_long mrts_wrong_if; /* arrived on wrong interface */ 105 u_long mrts_upq_ovflw; /* upcall Q overflow */ 106 u_long mrts_cache_cleanups; /* # entries with no upcalls */ 107 u_long mrts_drop_sel; /* pkts dropped selectively */ 108 u_long mrts_q_overflow; /* pkts dropped - Q overflow */ 109 u_long mrts_pkt2large; /* pkts dropped - size > BKT SIZE */ 110 u_long mrts_upq_sockfull; /* upcalls dropped - socket full */ 111 }; 112 113 114 #ifdef _KERNEL 115 116 /* 117 * Token bucket filter at each vif 118 */ 119 struct tbf { 120 u_int32_t last_pkt_t; /* arr. time of last pkt */ 121 u_int32_t n_tok; /* no of tokens in bucket */ 122 u_int32_t q_len; /* length of queue at this vif */ 123 }; 124 125 /* 126 * The kernel's virtual-interface structure. 127 */ 128 struct vif { 129 u_int8_t v_flags; /* VIFF_ flags defined above */ 130 u_int8_t v_threshold; /* min ttl required to forward on vif */ 131 u_int32_t v_rate_limit; /* max rate */ 132 struct tbf v_tbf; /* token bucket structure at intf. */ 133 struct in_addr v_lcl_addr; /* local interface address */ 134 struct in_addr v_rmt_addr; /* remote address (tunnels only) */ 135 struct ifnet *v_ifp; /* pointer to interface */ 136 u_long v_pkt_in; /* # pkts in on interface */ 137 u_long v_pkt_out; /* # pkts out on interface */ 138 u_long v_bytes_in; /* # bytes in on interface */ 139 u_long v_bytes_out; /* # bytes out on interface */ 140 struct route v_route; /* cached route if this is a tunnel */ 141 #ifdef RSVP_ISI 142 int v_rsvp_on; /* # RSVP listening on this vif */ 143 struct socket *v_rsvpd; /* # RSVPD daemon */ 144 #endif /* RSVP_ISI */ 145 }; 146 147 /* 148 * The kernel's multicast forwarding cache entry structure. 149 * (A field for the type of service (mfc_tos) is to be added 150 * at a future point.) 151 */ 152 struct mfc { 153 LIST_ENTRY(mfc) mfc_hash; 154 struct in_addr mfc_origin; /* ip origin of mcasts */ 155 struct in_addr mfc_mcastgrp; /* multicast group associated */ 156 vifi_t mfc_parent; /* incoming vif */ 157 u_int8_t mfc_ttls[MAXVIFS]; /* forwarding ttls on vifs */ 158 u_long mfc_pkt_cnt; /* pkt count for src-grp */ 159 u_long mfc_byte_cnt; /* byte count for src-grp */ 160 u_long mfc_wrong_if; /* wrong if for src-grp */ 161 int mfc_expire; /* time to clean entry up */ 162 struct timeval mfc_last_assert; /* last time I sent an assert */ 163 struct rtdetq *mfc_stall; /* pkts waiting for route */ 164 }; 165 166 /* 167 * Structure used to communicate from kernel to multicast router. 168 * (Note the convenient similarity to an IP packet.) 169 */ 170 struct igmpmsg { 171 u_int32_t unused1; 172 u_int32_t unused2; 173 u_int8_t im_msgtype; /* what type of message */ 174 #define IGMPMSG_NOCACHE 1 175 #define IGMPMSG_WRONGVIF 2 176 u_int8_t im_mbz; /* must be zero */ 177 u_int8_t im_vif; /* vif rec'd on */ 178 u_int8_t unused3; 179 struct in_addr im_src, im_dst; 180 }; 181 182 /* 183 * Argument structure used for pkt info. while upcall is made. 184 */ 185 struct rtdetq { 186 struct mbuf *m; /* a copy of the packet */ 187 struct ifnet *ifp; /* interface pkt came in on */ 188 #ifdef UPCALL_TIMING 189 struct timeval t; /* timestamp */ 190 #endif /* UPCALL_TIMING */ 191 struct rtdetq *next; 192 }; 193 194 #define MFCTBLSIZ 256 195 #define MAX_UPQ 4 /* max. no of pkts in upcall Q */ 196 197 /* 198 * Token bucket filter code 199 */ 200 #define MAX_BKT_SIZE 10000 /* 10K bytes size */ 201 #define MAXQSIZE 10 /* max. no of pkts in token queue */ 202 203 /* 204 * Queue structure at each vif 205 */ 206 struct pkt_queue { 207 u_int32_t pkt_len; /* length of packet in queue */ 208 struct mbuf *pkt_m; /* pointer to packet mbuf */ 209 struct ip *pkt_ip; /* pointer to ip header */ 210 }; 211 212 213 int ip_mforward __P((struct mbuf *, struct ifnet *)); 214 int ip_mrouter_get __P((int, struct socket *, struct mbuf **)); 215 int ip_mrouter_set __P((int, struct socket *, struct mbuf **)); 216 int ip_mrouter_done __P((void)); 217 218 #endif /* _KERNEL */ 219
Indexes created Fri Sep 26 08:10:20 GMT 2025