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/* $OpenBSD: ip_mroute.h,v 1.32 2024/10/13 02:27:44 jsg Exp $ */
/* $NetBSD: ip_mroute.h,v 1.23 2004/04/21 17:49:46 itojun Exp $ */
#ifndef _NETINET_IP_MROUTE_H_
#define _NETINET_IP_MROUTE_H_
/*
* Definitions for IP multicast forwarding.
*
* Written by David Waitzman, BBN Labs, August 1988.
* Modified by Steve Deering, Stanford, February 1989.
* Modified by Ajit Thyagarajan, PARC, August 1993.
* Modified by Ajit Thyagarajan, PARC, August 1994.
* Modified by Ahmed Helmy, SGI, June 1996.
* Modified by Pavlin Radoslavov, ICSI, October 2002.
*
* MROUTING Revision: 1.2
* advanced API support, bandwidth metering and signaling.
*/
/*
* Multicast Routing set/getsockopt commands.
*/
#define MRT_INIT 100 /* initialize forwarder */
#define MRT_DONE 101 /* shut down forwarder */
#define MRT_ADD_VIF 102 /* create virtual interface */
#define MRT_DEL_VIF 103 /* delete virtual interface */
#define MRT_ADD_MFC 104 /* insert forwarding cache entry */
#define MRT_DEL_MFC 105 /* delete forwarding cache entry */
#define MRT_VERSION 106 /* get kernel version number */
#define MRT_ASSERT 107 /* enable assert processing */
#define MRT_API_SUPPORT 109 /* supported MRT API */
#define MRT_API_CONFIG 110 /* config MRT API */
/*
* Types and macros for handling bitmaps with one bit per virtual interface.
*/
#define MAXVIFS 32
typedef u_int32_t vifbitmap_t;
typedef u_int16_t vifi_t; /* type of a vif index */
#define VIFM_SET(n, m) ((m) |= (1 << (n)))
#define VIFM_CLR(n, m) ((m) &= ~(1 << (n)))
#define VIFM_ISSET(n, m) ((m) & (1 << (n)))
#define VIFM_CLRALL(m) ((m) = 0x00000000)
#define VIFM_COPY(mfrom, mto) ((mto) = (mfrom))
#define VIFM_SAME(m1, m2) ((m1) == (m2))
#define VIFF_TUNNEL 0x1 /* vif represents a tunnel end-point */
#define VIFF_SRCRT 0x2 /* tunnel uses IP src routing */
/*
* Argument structure for MRT_ADD_VIF.
* (MRT_DEL_VIF takes a single vifi_t argument.)
*/
struct vifctl {
vifi_t vifc_vifi; /* the index of the vif to be added */
u_int8_t vifc_flags; /* VIFF_ flags defined above */
u_int8_t vifc_threshold; /* min ttl required to forward on vif */
u_int32_t vifc_rate_limit; /* ignored */
struct in_addr vifc_lcl_addr;/* local interface address */
struct in_addr vifc_rmt_addr;/* remote address (tunnels only) */
};
/*
* Argument structure for MRT_ADD_MFC and MRT_DEL_MFC.
* XXX if you change this, make sure to change struct mfcctl2 as well.
*/
struct mfcctl {
struct in_addr mfcc_origin; /* ip origin of mcasts */
struct in_addr mfcc_mcastgrp; /* multicast group associated */
vifi_t mfcc_parent; /* incoming vif */
u_int8_t mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
};
/*
* The new argument structure for MRT_ADD_MFC and MRT_DEL_MFC overlays
* and extends the old struct mfcctl.
*/
struct mfcctl2 {
/* the mfcctl fields */
struct in_addr mfcc_origin; /* ip origin of mcasts */
struct in_addr mfcc_mcastgrp; /* multicast group associated*/
vifi_t mfcc_parent; /* incoming vif */
u_int8_t mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
/* extension fields */
u_int8_t mfcc_flags[MAXVIFS]; /* the MRT_MFC_FLAGS_* flags */
struct in_addr mfcc_rp; /* the RP address */
};
/*
* The advanced-API flags.
*
* The MRT_MFC_FLAGS_XXX API flags are also used as flags
* for the mfcc_flags field.
*/
#define MRT_MFC_FLAGS_DISABLE_WRONGVIF (1 << 0) /* disable WRONGVIF signals */
#define MRT_MFC_RP (1 << 8) /* enable RP address */
#define MRT_MFC_BW_UPCALL (1 << 9) /* enable bw upcalls */
#define MRT_MFC_FLAGS_ALL (MRT_MFC_FLAGS_DISABLE_WRONGVIF)
#define MRT_API_FLAGS_ALL (MRT_MFC_FLAGS_ALL | \
MRT_MFC_RP | \
MRT_MFC_BW_UPCALL)
/* structure used to get all the mfc entries */
struct mfcinfo {
struct in_addr mfc_origin; /* ip origin of mcasts */
struct in_addr mfc_mcastgrp; /* multicast group associated */
vifi_t mfc_parent; /* incoming vif */
u_long mfc_pkt_cnt; /* pkt count for src-grp */
u_long mfc_byte_cnt; /* byte count for src-grp */
u_int8_t mfc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
};
/* structure used to get all the vif entries */
struct vifinfo {
vifi_t v_vifi; /* the index of the vif to be added */
u_int8_t v_flags; /* VIFF_ flags defined above */
u_int8_t v_threshold; /* min ttl required to forward on vif */
struct in_addr v_lcl_addr; /* local interface address */
struct in_addr v_rmt_addr; /* remote address (tunnels only) */
u_long v_pkt_in; /* # pkts in on interface */
u_long v_pkt_out; /* # pkts out on interface */
u_long v_bytes_in; /* # bytes in on interface */
u_long v_bytes_out; /* # bytes out on interface */
};
/*
* Argument structure used by mrouted to get src-grp pkt counts.
*/
struct sioc_sg_req {
struct in_addr src;
struct in_addr grp;
u_long pktcnt;
u_long bytecnt;
u_long wrong_if;
};
/*
* Argument structure used by mrouted to get vif pkt counts.
*/
struct sioc_vif_req {
vifi_t vifi; /* vif number */
u_long icount; /* input packet count on vif */
u_long ocount; /* output packet count on vif */
u_long ibytes; /* input byte count on vif */
u_long obytes; /* output byte count on vif */
};
/*
* The kernel's multicast routing statistics.
*/
struct mrtstat {
u_long mrts_mfc_lookups; /* # forw. cache hash table hits */
u_long mrts_mfc_misses; /* # forw. cache hash table misses */
u_long mrts_upcalls; /* # calls to mrouted */
u_long mrts_no_route; /* no route for packet's origin */
u_long mrts_bad_tunnel; /* malformed tunnel options */
u_long mrts_cant_tunnel; /* no room for tunnel options */
u_long mrts_wrong_if; /* arrived on wrong interface */
u_long mrts_upq_ovflw; /* upcall Q overflow */
u_long mrts_cache_cleanups; /* # entries with no upcalls */
u_long mrts_drop_sel; /* pkts dropped selectively */
u_long mrts_q_overflow; /* pkts dropped - Q overflow */
u_long mrts_pkt2large; /* pkts dropped - size > BKT SIZE */
u_long mrts_upq_sockfull; /* upcalls dropped - socket full */
};
#ifdef _KERNEL
/* How frequent should we look for expired entries (in seconds). */
#define MCAST_EXPIRE_FREQUENCY 30
extern struct rttimer_queue ip_mrouterq;
void mfc_expire_route(struct rtentry *, u_int);
extern int ip_mrtproto;
/*
* The kernel's virtual-interface structure.
*/
struct vif {
vifi_t v_id; /* Virtual interface index */
u_int8_t v_flags; /* VIFF_ flags defined above */
u_int8_t v_threshold; /* min ttl required to forward on vif */
struct in_addr v_lcl_addr; /* local interface address */
struct in_addr v_rmt_addr; /* remote address (tunnels only) */
u_long v_pkt_in; /* # pkts in on interface */
u_long v_pkt_out; /* # pkts out on interface */
u_long v_bytes_in; /* # bytes in on interface */
u_long v_bytes_out; /* # bytes out on interface */
};
/*
* The kernel's multicast forwarding cache entry structure.
* (A field for the type of service (mfc_tos) is to be added
* at a future point.)
*/
struct mfc {
vifi_t mfc_parent; /* incoming vif */
u_long mfc_pkt_cnt; /* pkt count for src-grp */
u_long mfc_byte_cnt; /* byte count for src-grp */
u_long mfc_wrong_if; /* wrong if for src-grp */
uint8_t mfc_ttl; /* route interface ttl */
uint8_t mfc_flags; /* MRT_MFC_FLAGS_* flags */
struct in_addr mfc_rp; /* the RP address */
u_long mfc_expire; /* expire timer */
};
/*
* Structure used to communicate from kernel to multicast router.
* (Note the convenient similarity to an IP packet.)
*/
struct igmpmsg {
u_int32_t unused1;
u_int32_t unused2;
u_int8_t im_msgtype; /* what type of message */
#define IGMPMSG_NOCACHE 1 /* no MFC in the kernel */
#define IGMPMSG_WRONGVIF 2 /* packet came from wrong interface */
#define IGMPMSG_BW_UPCALL 4 /* BW monitoring upcall */
u_int8_t im_mbz; /* must be zero */
u_int8_t im_vif; /* vif rec'd on */
u_int8_t unused3;
struct in_addr im_src, im_dst;
};
int ip_mrouter_set(struct socket *, int, struct mbuf *);
int ip_mrouter_get(struct socket *, int, struct mbuf *);
int mrt_ioctl(struct socket *, u_long, caddr_t);
int mrt_sysctl_vif(void *, size_t *);
int mrt_sysctl_mfc(void *, size_t *);
int ip_mrouter_done(struct socket *);
void vif_delete(struct ifnet *);
#endif /* _KERNEL */
#endif /* _NETINET_IP_MROUTE_H_ */
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