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/* $OpenBSD: ip_mroute.h,v 1.11 2004/11/24 01:25:42 mcbride 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.
*
* MROUTING Revision: 1.2
*/
#include <sys/queue.h>
#include <sys/timeout.h>
/*
* 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 */
/*
* 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_SETALL(m) ((m) = 0xffffffff)
#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 below */
u_int8_t vifc_threshold; /* min ttl required to forward on vif */
u_int32_t vifc_rate_limit; /* max rate */
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.
*/
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 */
};
/*
* 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
/*
* The kernel's virtual-interface structure.
*/
struct vif {
struct mbuf *tbf_q, **tbf_t; /* packet queue */
struct timeval tbf_last_pkt_t; /* arr. time of last pkt */
u_int32_t tbf_n_tok; /* no of tokens in bucket */
u_int32_t tbf_q_len; /* length of queue at this vif */
u_int32_t tbf_max_q_len; /* max. queue length */
u_int8_t v_flags; /* VIFF_ flags defined above */
u_int8_t v_threshold; /* min ttl required to forward on vif */
u_int32_t v_rate_limit; /* max rate */
struct in_addr v_lcl_addr; /* local interface address */
struct in_addr v_rmt_addr; /* remote address (tunnels only) */
struct ifnet *v_ifp; /* pointer to interface */
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 */
struct route v_route; /* cached route if this is a tunnel */
struct timeout v_repq_ch; /* for tbf_reprocess_q() */
#ifdef RSVP_ISI
int v_rsvp_on; /* # RSVP listening on this vif */
struct socket *v_rsvpd; /* # RSVPD daemon */
#endif /* RSVP_ISI */
};
/*
* 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 {
LIST_ENTRY(mfc) mfc_hash;
struct in_addr mfc_origin; /* ip origin of mcasts */
struct in_addr mfc_mcastgrp; /* multicast group associated */
vifi_t mfc_parent; /* incoming vif */
u_int8_t mfc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
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 */
int mfc_expire; /* time to clean entry up */
struct timeval mfc_last_assert; /* last time I sent an assert */
struct rtdetq *mfc_stall; /* pkts waiting for route */
};
/*
* 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 */
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;
};
/*
* Argument structure used for pkt info. while upcall is made.
*/
struct rtdetq {
struct mbuf *m; /* a copy of the packet */
struct ifnet *ifp; /* interface pkt came in on */
#ifdef UPCALL_TIMING
struct timeval t; /* timestamp */
#endif /* UPCALL_TIMING */
struct rtdetq *next;
};
#define MFCTBLSIZ 256
#define MAX_UPQ 4 /* max. no of pkts in upcall Q */
/*
* Token bucket filter code
*/
#define MAX_BKT_SIZE 10000 /* 10K bytes size */
#define MAXQSIZE 10 /* max. no of pkts in token queue */
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 ip_mrouter_done(void);
void ip_mrouter_detach(struct ifnet *);
void reset_vif(struct vif *);
void vif_delete(struct ifnet *);
#ifdef RSVP_ISI
int ip_mforward(struct mbuf *, struct ifnet *, struct ip_moptions *);
int legal_vif_num(int);
int ip_rsvp_vif_init(struct socket *, struct mbuf *);
int ip_rsvp_vif_done(struct socket *, struct mbuf *);
void ip_rsvp_force_done(struct socket *);
void rsvp_input(struct mbuf *, int, int);
#else
int ip_mforward(struct mbuf *, struct ifnet *);
#endif /* RSVP_ISI */
void ipip_mroute_input(struct mbuf *, ...);
#endif /* _KERNEL */
#endif /* _NETINET_IP_MROUTE_H_ */
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