7e6cabd06e
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
360 lines
14 KiB
C
360 lines
14 KiB
C
/*-
|
|
* 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 128
|
|
/* 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
|
|
/*
|
|
* 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; /* list of bandwidth meters */
|
|
u_long mfc_nstall; /* # of packets awaiting mfc */
|
|
TAILQ_HEAD(, rtdetq) mfc_stall; /* q of packets 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) */
|
|
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 */
|
|
};
|
|
|
|
#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);
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* _NETINET_IP_MROUTE_H_ */
|