NetBSD/sys/netinet/ip_mroute.h

359 lines
13 KiB
C

/* $NetBSD: ip_mroute.h,v 1.31 2008/08/07 06:20:14 cegger 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
* and PIM-SMv2 and PIM-DM support, advanced API support,
* bandwidth metering and signaling.
*/
#include <sys/queue.h>
#include <sys/callout.h>
#ifdef _KERNEL
struct sockopt; /* from <sys/socketvar.h> */
#endif
/*
* 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_PIM MRT_ASSERT /* enable PIM processing */
#define MRT_API_SUPPORT 109 /* supported MRT API */
#define MRT_API_CONFIG 110 /* config MRT API */
#define MRT_ADD_BW_UPCALL 111 /* create bandwidth monitor */
#define MRT_DEL_BW_UPCALL 112 /* delete bandwidth monitor */
/*
* 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 */
#define VIFF_REGISTER 0x4 /* used for PIM Register encap/decap */
/*
* 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.
* 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_FLAGS_BORDER_VIF (1 << 1) /* border vif */
#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 | \
MRT_MFC_FLAGS_BORDER_VIF)
#define MRT_API_FLAGS_ALL (MRT_MFC_FLAGS_ALL | \
MRT_MFC_RP | \
MRT_MFC_BW_UPCALL)
/*
* Structure for installing or delivering an upcall if the
* measured bandwidth is above or below a threshold.
*
* User programs (e.g. daemons) may have a need to know when the
* bandwidth used by some data flow is above or below some threshold.
* This interface allows the userland to specify the threshold (in
* bytes and/or packets) and the measurement interval. Flows are
* all packet with the same source and destination IP address.
* At the moment the code is only used for multicast destinations
* but there is nothing that prevents its use for unicast.
*
* The measurement interval cannot be shorter than some Tmin (currently, 3s).
* The threshold is set in packets and/or bytes per_interval.
*
* Measurement works as follows:
*
* For >= measurements:
* The first packet marks the start of a measurement interval.
* During an interval we count packets and bytes, and when we
* pass the threshold we deliver an upcall and we are done.
* The first packet after the end of the interval resets the
* count and restarts the measurement.
*
* For <= measurement:
* We start a timer to fire at the end of the interval, and
* then for each incoming packet we count packets and bytes.
* When the timer fires, we compare the value with the threshold,
* schedule an upcall if we are below, and restart the measurement
* (reschedule timer and zero counters).
*/
struct bw_data {
struct timeval b_time;
u_int64_t b_packets;
u_int64_t b_bytes;
};
struct bw_upcall {
struct in_addr bu_src; /* source address */
struct in_addr bu_dst; /* destination address */
u_int32_t bu_flags; /* misc flags (see below) */
#define BW_UPCALL_UNIT_PACKETS (1 << 0) /* threshold (in packets) */
#define BW_UPCALL_UNIT_BYTES (1 << 1) /* threshold (in bytes) */
#define BW_UPCALL_GEQ (1 << 2) /* upcall if bw >= threshold */
#define BW_UPCALL_LEQ (1 << 3) /* upcall if bw <= threshold */
#define BW_UPCALL_DELETE_ALL (1 << 4) /* delete all upcalls for s,d*/
struct bw_data bu_threshold; /* the bw threshold */
struct bw_data bu_measured; /* the measured bw */
};
/* max. number of upcalls to deliver together */
#define BW_UPCALLS_MAX 128
/* min. threshold time interval for bandwidth measurement */
#define BW_UPCALL_THRESHOLD_INTERVAL_MIN_SEC 3
#define BW_UPCALL_THRESHOLD_INTERVAL_MIN_USEC 0
/*
* 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 encaptab;
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 */
callout_t 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 */
const struct encaptab *v_encap_cookie;
};
/*
* 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 */
u_int8_t mfc_flags[MAXVIFS]; /* the MRT_MFC_FLAGS_* flags */
struct in_addr mfc_rp; /* the RP address */
struct bw_meter *mfc_bw_meter; /* list of bandwidth meters */
};
/*
* 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_WHOLEPKT 3 /* PIM pkt for user level encap. */
#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;
} __packed;
/*
* 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 */
/*
* Structure for measuring the bandwidth and sending an upcall if the
* measured bandwidth is above or below a threshold.
*/
struct bw_meter {
struct bw_meter *bm_mfc_next; /* next bw meter (same mfc) */
struct bw_meter *bm_time_next; /* next bw meter (same time) */
uint32_t bm_time_hash; /* the time hash value */
struct mfc *bm_mfc; /* the corresponding mfc */
uint32_t bm_flags; /* misc flags (see below) */
#define BW_METER_UNIT_PACKETS (1 << 0) /* threshold (in packets) */
#define BW_METER_UNIT_BYTES (1 << 1) /* threshold (in bytes) */
#define BW_METER_GEQ (1 << 2) /* upcall if bw >= threshold */
#define BW_METER_LEQ (1 << 3) /* upcall if bw <= threshold */
#define BW_METER_USER_FLAGS (BW_METER_UNIT_PACKETS | \
BW_METER_UNIT_BYTES | \
BW_METER_GEQ | \
BW_METER_LEQ)
#define BW_METER_UPCALL_DELIVERED (1 << 24) /* upcall was delivered */
struct bw_data bm_threshold; /* the upcall threshold */
struct bw_data bm_measured; /* the measured bw */
struct timeval bm_start_time; /* abs. time */
};
int ip_mrouter_set(struct socket *, struct sockopt *);
int ip_mrouter_get(struct socket *, struct sockopt *);
int mrt_ioctl(struct socket *, u_long, void *);
int ip_mrouter_done(void);
void ip_mrouter_detach(struct ifnet *);
void reset_vif(struct vif *);
#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
#endif /* _KERNEL */
#endif /* !_NETINET_IP_MROUTE_H_ */