ip_mroute.h revision 1.19
1/* $NetBSD: ip_mroute.h,v 1.19 2001/05/08 10:07:15 itojun 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#ifndef _NETINET_IP_MROUTE_H_ 15#define _NETINET_IP_MROUTE_H_ 16 17#include <sys/queue.h> 18#include <sys/callout.h> 19 20/* 21 * Multicast Routing set/getsockopt commands. 22 */ 23#define MRT_INIT 100 /* initialize forwarder */ 24#define MRT_DONE 101 /* shut down forwarder */ 25#define MRT_ADD_VIF 102 /* create virtual interface */ 26#define MRT_DEL_VIF 103 /* delete virtual interface */ 27#define MRT_ADD_MFC 104 /* insert forwarding cache entry */ 28#define MRT_DEL_MFC 105 /* delete forwarding cache entry */ 29#define MRT_VERSION 106 /* get kernel version number */ 30#define MRT_ASSERT 107 /* enable PIM assert processing */ 31 32 33/* 34 * Types and macros for handling bitmaps with one bit per virtual interface. 35 */ 36#define MAXVIFS 32 37typedef u_int32_t vifbitmap_t; 38typedef u_int16_t vifi_t; /* type of a vif index */ 39 40#define VIFM_SET(n, m) ((m) |= (1 << (n))) 41#define VIFM_CLR(n, m) ((m) &= ~(1 << (n))) 42#define VIFM_ISSET(n, m) ((m) & (1 << (n))) 43#define VIFM_SETALL(m) ((m) = 0xffffffff) 44#define VIFM_CLRALL(m) ((m) = 0x00000000) 45#define VIFM_COPY(mfrom, mto) ((mto) = (mfrom)) 46#define VIFM_SAME(m1, m2) ((m1) == (m2)) 47 48#define VIFF_TUNNEL 0x1 /* vif represents a tunnel end-point */ 49#define VIFF_SRCRT 0x2 /* tunnel uses IP src routing */ 50 51/* 52 * Argument structure for MRT_ADD_VIF. 53 * (MRT_DEL_VIF takes a single vifi_t argument.) 54 */ 55struct vifctl { 56 vifi_t vifc_vifi; /* the index of the vif to be added */ 57 u_int8_t vifc_flags; /* VIFF_ flags defined below */ 58 u_int8_t vifc_threshold; /* min ttl required to forward on vif */ 59 u_int32_t vifc_rate_limit; /* max rate */ 60 struct in_addr vifc_lcl_addr;/* local interface address */ 61 struct in_addr vifc_rmt_addr;/* remote address (tunnels only) */ 62}; 63 64/* 65 * Argument structure for MRT_ADD_MFC and MRT_DEL_MFC. 66 * (mfcc_tos to be added at a future point) 67 */ 68struct mfcctl { 69 struct in_addr mfcc_origin; /* ip origin of mcasts */ 70 struct in_addr mfcc_mcastgrp; /* multicast group associated */ 71 vifi_t mfcc_parent; /* incoming vif */ 72 u_int8_t mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */ 73}; 74 75/* 76 * Argument structure used by mrouted to get src-grp pkt counts. 77 */ 78struct sioc_sg_req { 79 struct in_addr src; 80 struct in_addr grp; 81 u_long pktcnt; 82 u_long bytecnt; 83 u_long wrong_if; 84}; 85 86/* 87 * Argument structure used by mrouted to get vif pkt counts. 88 */ 89struct sioc_vif_req { 90 vifi_t vifi; /* vif number */ 91 u_long icount; /* input packet count on vif */ 92 u_long ocount; /* output packet count on vif */ 93 u_long ibytes; /* input byte count on vif */ 94 u_long obytes; /* output byte count on vif */ 95}; 96 97 98/* 99 * The kernel's multicast routing statistics. 100 */ 101struct mrtstat { 102 u_long mrts_mfc_lookups; /* # forw. cache hash table hits */ 103 u_long mrts_mfc_misses; /* # forw. cache hash table misses */ 104 u_long mrts_upcalls; /* # calls to mrouted */ 105 u_long mrts_no_route; /* no route for packet's origin */ 106 u_long mrts_bad_tunnel; /* malformed tunnel options */ 107 u_long mrts_cant_tunnel; /* no room for tunnel options */ 108 u_long mrts_wrong_if; /* arrived on wrong interface */ 109 u_long mrts_upq_ovflw; /* upcall Q overflow */ 110 u_long mrts_cache_cleanups; /* # entries with no upcalls */ 111 u_long mrts_drop_sel; /* pkts dropped selectively */ 112 u_long mrts_q_overflow; /* pkts dropped - Q overflow */ 113 u_long mrts_pkt2large; /* pkts dropped - size > BKT SIZE */ 114 u_long mrts_upq_sockfull; /* upcalls dropped - socket full */ 115}; 116 117 118#ifdef _KERNEL 119 120/* 121 * The kernel's virtual-interface structure. 122 */ 123struct encaptab; 124struct vif { 125 struct mbuf *tbf_q, **tbf_t; /* packet queue */ 126 struct timeval tbf_last_pkt_t; /* arr. time of last pkt */ 127 u_int32_t tbf_n_tok; /* no of tokens in bucket */ 128 u_int32_t tbf_q_len; /* length of queue at this vif */ 129 u_int32_t tbf_max_q_len; /* max. queue length */ 130 131 u_int8_t v_flags; /* VIFF_ flags defined above */ 132 u_int8_t v_threshold; /* min ttl required to forward on vif */ 133 u_int32_t v_rate_limit; /* max rate */ 134 struct in_addr v_lcl_addr; /* local interface address */ 135 struct in_addr v_rmt_addr; /* remote address (tunnels only) */ 136 struct ifnet *v_ifp; /* pointer to interface */ 137 u_long v_pkt_in; /* # pkts in on interface */ 138 u_long v_pkt_out; /* # pkts out on interface */ 139 u_long v_bytes_in; /* # bytes in on interface */ 140 u_long v_bytes_out; /* # bytes out on interface */ 141 struct route v_route; /* cached route if this is a tunnel */ 142 struct callout v_repq_ch; /* for tbf_reprocess_q() */ 143#ifdef RSVP_ISI 144 int v_rsvp_on; /* # RSVP listening on this vif */ 145 struct socket *v_rsvpd; /* # RSVPD daemon */ 146#endif /* RSVP_ISI */ 147 const struct encaptab *v_encap_cookie; 148}; 149 150/* 151 * The kernel's multicast forwarding cache entry structure. 152 * (A field for the type of service (mfc_tos) is to be added 153 * at a future point.) 154 */ 155struct mfc { 156 LIST_ENTRY(mfc) mfc_hash; 157 struct in_addr mfc_origin; /* ip origin of mcasts */ 158 struct in_addr mfc_mcastgrp; /* multicast group associated */ 159 vifi_t mfc_parent; /* incoming vif */ 160 u_int8_t mfc_ttls[MAXVIFS]; /* forwarding ttls on vifs */ 161 u_long mfc_pkt_cnt; /* pkt count for src-grp */ 162 u_long mfc_byte_cnt; /* byte count for src-grp */ 163 u_long mfc_wrong_if; /* wrong if for src-grp */ 164 int mfc_expire; /* time to clean entry up */ 165 struct timeval mfc_last_assert; /* last time I sent an assert */ 166 struct rtdetq *mfc_stall; /* pkts waiting for route */ 167}; 168 169/* 170 * Structure used to communicate from kernel to multicast router. 171 * (Note the convenient similarity to an IP packet.) 172 */ 173struct igmpmsg { 174 u_int32_t unused1; 175 u_int32_t unused2; 176 u_int8_t im_msgtype; /* what type of message */ 177#define IGMPMSG_NOCACHE 1 178#define IGMPMSG_WRONGVIF 2 179 u_int8_t im_mbz; /* must be zero */ 180 u_int8_t im_vif; /* vif rec'd on */ 181 u_int8_t unused3; 182 struct in_addr im_src, im_dst; 183} __attribute__((__packed__)); 184 185/* 186 * Argument structure used for pkt info. while upcall is made. 187 */ 188struct rtdetq { 189 struct mbuf *m; /* a copy of the packet */ 190 struct ifnet *ifp; /* interface pkt came in on */ 191#ifdef UPCALL_TIMING 192 struct timeval t; /* timestamp */ 193#endif /* UPCALL_TIMING */ 194 struct rtdetq *next; 195}; 196 197#define MFCTBLSIZ 256 198#define MAX_UPQ 4 /* max. no of pkts in upcall Q */ 199 200/* 201 * Token bucket filter code 202 */ 203#define MAX_BKT_SIZE 10000 /* 10K bytes size */ 204#define MAXQSIZE 10 /* max. no of pkts in token queue */ 205 206 207int ip_mrouter_set __P((struct socket *, int, struct mbuf **)); 208int ip_mrouter_get __P((struct socket *, int, struct mbuf **)); 209int mrt_ioctl __P((struct socket *, u_long, caddr_t)); 210int ip_mrouter_done __P((void)); 211void reset_vif __P((struct vif *)); 212#ifdef RSVP_ISI 213int ip_mforward __P((struct mbuf *, struct ifnet *, struct ip_moptions *)); 214int legal_vif_num __P((int)); 215int ip_rsvp_vif_init __P((struct socket *, struct mbuf *)); 216int ip_rsvp_vif_done __P((struct socket *, struct mbuf *)); 217void ip_rsvp_force_done __P((struct socket *)); 218/*int rsvp_input __P((struct mbuf *, struct ifnet *));*/ 219void rsvp_input __P((struct mbuf *, int, int)); 220#else 221int ip_mforward __P((struct mbuf *, struct ifnet *)); 222#endif 223 224#endif /* _KERNEL */ 225 226#endif /* _NETINET_IP_MROUTE_H_ */ 227