76f193cd69
This is purely a forwarding plane cleanup; no control plane code is involved. Summary: * Split IPv4 and IPv6 MROUTING support. The static compile-time kernel option remains the same, however, the modules may now be built for IPv4 and IPv6 separately as ip_mroute_mod and ip6_mroute_mod. * Clean up the IPv4 multicast forwarding code to use BSD queue and hash table constructs. Don't build our own timer abstractions when ratecheck() and timevalclear() etc will do. * Expose the multicast forwarding cache (MFC) and virtual interface table (VIF) as sysctls, to reduce netstat's dependence on libkvm for this information for running kernels. * bandwidth meters however still require libkvm. * Make the MFC hash table size a boot/load-time tunable ULONG, net.inet.ip.mfchashsize (defaults to 256). * Remove unused members from struct vif and struct mfc. * Kill RSVP support, as no current RSVP implementation uses it. These stubs could be moved to raw_ip.c. * Don't share locks or initialization between IPv4 and IPv6. * Don't use a static struct route_in6 in ip6_mroute.c. The v6 code is still using a cached struct route_in6, this is moved to mif6 for the time being. * More cleanup remains to be merged from ip_mroute.c to ip6_mroute.c. v4 path tested using ports/net/mcast-tools. v6 changes are mostly mechanical locking and *have not* been tested. As these changes partially break some kernel ABIs, they will not be MFCed. There is a lot more work to be done here. Reviewed by: Pavlin Radoslavov
351 lines
13 KiB
C
351 lines
13 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.
|
|
* 4. 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))
|
|
|
|
|
|
/*
|
|
* 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 {
|
|
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 multicast routing daemon */
|
|
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 */
|
|
};
|
|
|
|
/*
|
|
* 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 */
|
|
struct route v_route; /* cached route */
|
|
};
|
|
|
|
/*
|
|
* 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 */
|
|
};
|
|
|
|
/*
|
|
* 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;
|
|
};
|
|
|
|
/*
|
|
* 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 */
|
|
|
|
/*
|
|
* 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)(int, caddr_t, int);
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* _NETINET_IP_MROUTE_H_ */
|