241 lines
8.2 KiB
C
241 lines
8.2 KiB
C
/* $OpenBSD: ip_mroute.h,v 1.31 2022/05/05 13:57:40 claudio Exp $ */
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/* $NetBSD: ip_mroute.h,v 1.23 2004/04/21 17:49:46 itojun Exp $ */
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#ifndef _NETINET_IP_MROUTE_H_
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#define _NETINET_IP_MROUTE_H_
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/*
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* Definitions for IP multicast forwarding.
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*
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* Written by David Waitzman, BBN Labs, August 1988.
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* Modified by Steve Deering, Stanford, February 1989.
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* Modified by Ajit Thyagarajan, PARC, August 1993.
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* Modified by Ajit Thyagarajan, PARC, August 1994.
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* Modified by Ahmed Helmy, SGI, June 1996.
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* Modified by Pavlin Radoslavov, ICSI, October 2002.
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*
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* MROUTING Revision: 1.2
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* advanced API support, bandwidth metering and signaling.
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*/
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#include <sys/timeout.h>
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/*
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* Multicast Routing set/getsockopt commands.
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*/
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#define MRT_INIT 100 /* initialize forwarder */
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#define MRT_DONE 101 /* shut down forwarder */
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#define MRT_ADD_VIF 102 /* create virtual interface */
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#define MRT_DEL_VIF 103 /* delete virtual interface */
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#define MRT_ADD_MFC 104 /* insert forwarding cache entry */
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#define MRT_DEL_MFC 105 /* delete forwarding cache entry */
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#define MRT_VERSION 106 /* get kernel version number */
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#define MRT_ASSERT 107 /* enable assert processing */
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#define MRT_API_SUPPORT 109 /* supported MRT API */
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#define MRT_API_CONFIG 110 /* config MRT API */
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/*
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* Types and macros for handling bitmaps with one bit per virtual interface.
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*/
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#define MAXVIFS 32
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typedef u_int32_t vifbitmap_t;
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typedef u_int16_t vifi_t; /* type of a vif index */
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#define VIFM_SET(n, m) ((m) |= (1 << (n)))
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#define VIFM_CLR(n, m) ((m) &= ~(1 << (n)))
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#define VIFM_ISSET(n, m) ((m) & (1 << (n)))
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#define VIFM_CLRALL(m) ((m) = 0x00000000)
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#define VIFM_COPY(mfrom, mto) ((mto) = (mfrom))
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#define VIFM_SAME(m1, m2) ((m1) == (m2))
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#define VIFF_TUNNEL 0x1 /* vif represents a tunnel end-point */
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#define VIFF_SRCRT 0x2 /* tunnel uses IP src routing */
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/*
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* Argument structure for MRT_ADD_VIF.
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* (MRT_DEL_VIF takes a single vifi_t argument.)
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*/
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struct vifctl {
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vifi_t vifc_vifi; /* the index of the vif to be added */
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u_int8_t vifc_flags; /* VIFF_ flags defined above */
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u_int8_t vifc_threshold; /* min ttl required to forward on vif */
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u_int32_t vifc_rate_limit; /* ignored */
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struct in_addr vifc_lcl_addr;/* local interface address */
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struct in_addr vifc_rmt_addr;/* remote address (tunnels only) */
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};
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/*
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* Argument structure for MRT_ADD_MFC and MRT_DEL_MFC.
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* XXX if you change this, make sure to change struct mfcctl2 as well.
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*/
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struct mfcctl {
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struct in_addr mfcc_origin; /* ip origin of mcasts */
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struct in_addr mfcc_mcastgrp; /* multicast group associated */
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vifi_t mfcc_parent; /* incoming vif */
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u_int8_t mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
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};
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/*
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* The new argument structure for MRT_ADD_MFC and MRT_DEL_MFC overlays
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* and extends the old struct mfcctl.
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*/
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struct mfcctl2 {
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/* the mfcctl fields */
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struct in_addr mfcc_origin; /* ip origin of mcasts */
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struct in_addr mfcc_mcastgrp; /* multicast group associated*/
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vifi_t mfcc_parent; /* incoming vif */
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u_int8_t mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
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/* extension fields */
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u_int8_t mfcc_flags[MAXVIFS]; /* the MRT_MFC_FLAGS_* flags */
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struct in_addr mfcc_rp; /* the RP address */
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};
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/*
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* The advanced-API flags.
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*
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* The MRT_MFC_FLAGS_XXX API flags are also used as flags
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* for the mfcc_flags field.
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*/
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#define MRT_MFC_FLAGS_DISABLE_WRONGVIF (1 << 0) /* disable WRONGVIF signals */
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#define MRT_MFC_RP (1 << 8) /* enable RP address */
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#define MRT_MFC_BW_UPCALL (1 << 9) /* enable bw upcalls */
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#define MRT_MFC_FLAGS_ALL (MRT_MFC_FLAGS_DISABLE_WRONGVIF)
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#define MRT_API_FLAGS_ALL (MRT_MFC_FLAGS_ALL | \
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MRT_MFC_RP | \
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MRT_MFC_BW_UPCALL)
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/* structure used to get all the mfc entries */
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struct mfcinfo {
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struct in_addr mfc_origin; /* ip origin of mcasts */
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struct in_addr mfc_mcastgrp; /* multicast group associated */
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vifi_t mfc_parent; /* incoming vif */
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u_long mfc_pkt_cnt; /* pkt count for src-grp */
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u_long mfc_byte_cnt; /* byte count for src-grp */
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u_int8_t mfc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
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};
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/* structure used to get all the vif entries */
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struct vifinfo {
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vifi_t v_vifi; /* the index of the vif to be added */
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u_int8_t v_flags; /* VIFF_ flags defined above */
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u_int8_t v_threshold; /* min ttl required to forward on vif */
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struct in_addr v_lcl_addr; /* local interface address */
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struct in_addr v_rmt_addr; /* remote address (tunnels only) */
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u_long v_pkt_in; /* # pkts in on interface */
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u_long v_pkt_out; /* # pkts out on interface */
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u_long v_bytes_in; /* # bytes in on interface */
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u_long v_bytes_out; /* # bytes out on interface */
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};
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/*
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* Argument structure used by mrouted to get src-grp pkt counts.
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*/
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struct sioc_sg_req {
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struct in_addr src;
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struct in_addr grp;
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u_long pktcnt;
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u_long bytecnt;
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u_long wrong_if;
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};
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/*
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* Argument structure used by mrouted to get vif pkt counts.
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*/
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struct sioc_vif_req {
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vifi_t vifi; /* vif number */
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u_long icount; /* input packet count on vif */
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u_long ocount; /* output packet count on vif */
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u_long ibytes; /* input byte count on vif */
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u_long obytes; /* output byte count on vif */
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};
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/*
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* The kernel's multicast routing statistics.
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*/
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struct mrtstat {
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u_long mrts_mfc_lookups; /* # forw. cache hash table hits */
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u_long mrts_mfc_misses; /* # forw. cache hash table misses */
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u_long mrts_upcalls; /* # calls to mrouted */
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u_long mrts_no_route; /* no route for packet's origin */
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u_long mrts_bad_tunnel; /* malformed tunnel options */
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u_long mrts_cant_tunnel; /* no room for tunnel options */
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u_long mrts_wrong_if; /* arrived on wrong interface */
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u_long mrts_upq_ovflw; /* upcall Q overflow */
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u_long mrts_cache_cleanups; /* # entries with no upcalls */
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u_long mrts_drop_sel; /* pkts dropped selectively */
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u_long mrts_q_overflow; /* pkts dropped - Q overflow */
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u_long mrts_pkt2large; /* pkts dropped - size > BKT SIZE */
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u_long mrts_upq_sockfull; /* upcalls dropped - socket full */
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};
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#ifdef _KERNEL
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/* How frequent should we look for expired entries (in seconds). */
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#define MCAST_EXPIRE_FREQUENCY 30
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extern struct rttimer_queue ip_mrouterq;
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void mfc_expire_route(struct rtentry *, u_int);
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extern int ip_mrtproto;
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/*
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* The kernel's virtual-interface structure.
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*/
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struct vif {
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vifi_t v_id; /* Virtual interface index */
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u_int8_t v_flags; /* VIFF_ flags defined above */
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u_int8_t v_threshold; /* min ttl required to forward on vif */
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struct in_addr v_lcl_addr; /* local interface address */
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struct in_addr v_rmt_addr; /* remote address (tunnels only) */
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u_long v_pkt_in; /* # pkts in on interface */
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u_long v_pkt_out; /* # pkts out on interface */
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u_long v_bytes_in; /* # bytes in on interface */
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u_long v_bytes_out; /* # bytes out on interface */
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};
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/*
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* The kernel's multicast forwarding cache entry structure.
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* (A field for the type of service (mfc_tos) is to be added
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* at a future point.)
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*/
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struct mfc {
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vifi_t mfc_parent; /* incoming vif */
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u_long mfc_pkt_cnt; /* pkt count for src-grp */
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u_long mfc_byte_cnt; /* byte count for src-grp */
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u_long mfc_wrong_if; /* wrong if for src-grp */
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uint8_t mfc_ttl; /* route interface ttl */
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uint8_t mfc_flags; /* MRT_MFC_FLAGS_* flags */
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struct in_addr mfc_rp; /* the RP address */
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u_long mfc_expire; /* expire timer */
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};
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/*
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* Structure used to communicate from kernel to multicast router.
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* (Note the convenient similarity to an IP packet.)
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*/
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struct igmpmsg {
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u_int32_t unused1;
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u_int32_t unused2;
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u_int8_t im_msgtype; /* what type of message */
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#define IGMPMSG_NOCACHE 1 /* no MFC in the kernel */
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#define IGMPMSG_WRONGVIF 2 /* packet came from wrong interface */
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#define IGMPMSG_BW_UPCALL 4 /* BW monitoring upcall */
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u_int8_t im_mbz; /* must be zero */
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u_int8_t im_vif; /* vif rec'd on */
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u_int8_t unused3;
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struct in_addr im_src, im_dst;
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};
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int ip_mrouter_set(struct socket *, int, struct mbuf *);
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int ip_mrouter_get(struct socket *, int, struct mbuf *);
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int mrt_ioctl(struct socket *, u_long, caddr_t);
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int mrt_sysctl_vif(void *, size_t *);
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int mrt_sysctl_mfc(void *, size_t *);
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int ip_mrouter_done(struct socket *);
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void vif_delete(struct ifnet *);
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#endif /* _KERNEL */
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#endif /* _NETINET_IP_MROUTE_H_ */
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