/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1989 Stephen Deering.
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Stephen Deering of Stanford University.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)ip_mroute.h 8.1 (Berkeley) 6/10/93
* $FreeBSD$
*/
#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: 3.3.1.3
* and PIM-SMv2 and PIM-DM support, 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_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_long vifbitmap_t;
typedef u_short vifi_t; /* type of a vif index */
#define ALL_VIFS (vifi_t)-1
#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))
struct mfc;
/*
* 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_char vifc_flags; /* VIFF_ flags defined below */
u_char vifc_threshold; /* min ttl required to forward on vif */
u_int vifc_rate_limit; /* max rate */
struct in_addr vifc_lcl_addr; /* local interface address */
struct in_addr vifc_rmt_addr; /* remote address (tunnels only) */
};
#define VIFF_TUNNEL 0x1 /* no-op; retained for old source */
#define VIFF_SRCRT 0x2 /* no-op; retained for old source */
#define VIFF_REGISTER 0x4 /* used for PIM Register encap/decap */
/*
* 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_char 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_char mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
/* extension fields */
uint8_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;
uint64_t b_packets;
uint64_t b_bytes;
};
struct bw_upcall {
struct in_addr bu_src; /* source address */
struct in_addr bu_dst; /* destination address */
uint32_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 1024
/* min. threshold time interval for bandwidth measurement */
#define BW_UPCALL_THRESHOLD_INTERVAL_MIN_SEC 3
#define BW_UPCALL_THRESHOLD_INTERVAL_MIN_USEC 0
/*
* The kernel's multicast routing statistics.
*/
struct mrtstat {
uint64_t mrts_mfc_lookups; /* # forw. cache hash table hits */
uint64_t mrts_mfc_misses; /* # forw. cache hash table misses */
uint64_t mrts_upcalls; /* # calls to multicast routing daemon */
uint64_t mrts_no_route; /* no route for packet's origin */
uint64_t mrts_bad_tunnel; /* malformed tunnel options */
uint64_t mrts_cant_tunnel; /* no room for tunnel options */
uint64_t mrts_wrong_if; /* arrived on wrong interface */
uint64_t mrts_upq_ovflw; /* upcall Q overflow */
uint64_t mrts_cache_cleanups; /* # entries with no upcalls */
uint64_t mrts_drop_sel; /* pkts dropped selectively */
uint64_t mrts_q_overflow; /* pkts dropped - Q overflow */
uint64_t mrts_pkt2large; /* pkts dropped - size > BKT SIZE */
uint64_t mrts_upq_sockfull; /* upcalls dropped - socket full */
};
#ifdef _KERNEL
#define MRTSTAT_ADD(name, val) \
VNET_PCPUSTAT_ADD(struct mrtstat, mrtstat, name, (val))
#define MRTSTAT_INC(name) MRTSTAT_ADD(name, 1)
#endif
/*
* 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 virtual-interface structure.
*/
struct vif {
u_char v_flags; /* VIFF_ flags defined above */
u_char 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) */
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 */
#ifdef _KERNEL
struct mtx v_spin; /* Spin mutex for pkt stats */
char v_spin_name[32];
#endif
};
#if defined(_KERNEL) || defined (_NETSTAT)
/*
* The kernel's multicast forwarding cache entry structure
*/
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_char 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*/
uint8_t mfc_flags[MAXVIFS]; /* the MRT_MFC_FLAGS_* flags */
struct in_addr mfc_rp; /* the RP address */
struct bw_meter *mfc_bw_meter_leq; /* list of bandwidth meters
for Lower-or-EQual case */
struct bw_meter *mfc_bw_meter_geq; /* list of bandwidth meters
for Greater-or-EQual case */
struct buf_ring *mfc_stall_ring; /* ring of awaiting mfc */
};
#endif /* _KERNEL */
/*
* Struct used to communicate from kernel to multicast router
* note the convenient similarity to an IP packet
*/
struct igmpmsg {
uint32_t unused1;
uint32_t unused2;
u_char 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_char im_mbz; /* must be zero */
u_char im_vif; /* vif rec'd on */
u_char unused3;
struct in_addr im_src, im_dst;
};
#ifdef _KERNEL
/*
* Argument structure used for pkt info. while upcall is made
*/
struct rtdetq {
TAILQ_ENTRY(rtdetq) rte_link;
struct mbuf *m; /* A copy of the packet */
struct ifnet *ifp; /* Interface pkt came in on */
vifi_t xmt_vif; /* Saved copy of imo_multicast_vif */
};
#define MAX_UPQ 4 /* max. no of pkts in upcall Q */
#endif /* _KERNEL */
/*
* 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) */
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 */
#ifdef _KERNEL
struct callout bm_meter_callout; /* Periodic callout */
void* arg; /* custom argument */
struct mtx bm_spin; /* meter spin lock */
char bm_spin_name[32];
#endif
};
#ifdef _KERNEL
struct sockopt;
extern int (*ip_mrouter_set)(struct socket *, struct sockopt *);
extern int (*ip_mrouter_get)(struct socket *, struct sockopt *);
extern int (*ip_mrouter_done)(void);
extern int (*mrt_ioctl)(u_long, caddr_t, int);
#define MROUTER_RLOCK_TRACKER struct epoch_tracker mrouter_et
#define MROUTER_RLOCK() epoch_enter_preempt(net_epoch_preempt, &mrouter_et)
#define MROUTER_RUNLOCK() epoch_exit_preempt(net_epoch_preempt, &mrouter_et)
#define MROUTER_WAIT() epoch_wait_preempt(net_epoch_preempt)
#endif /* _KERNEL */
#endif /* _NETINET_IP_MROUTE_H_ */
