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
272 lines
9.4 KiB
C
272 lines
9.4 KiB
C
/*-
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* Copyright (C) 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $KAME: ip6_mroute.h,v 1.19 2001/06/14 06:12:55 suz Exp $
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* $FreeBSD$
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*/
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/* BSDI ip_mroute.h,v 2.5 1996/10/11 16:01:48 pjd Exp */
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/*
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* Definitions for IP multicast forwarding.
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*
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* Written by David Waitzman, BBN Labs, August 1988.
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* Modified by Steve Deering, Stanford, February 1989.
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* Modified by Ajit Thyagarajan, PARC, August 1993.
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* Modified by Ajit Thyagarajan, PARC, August 1994.
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* Modified by Ahmed Helmy, USC, September 1996.
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*
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* MROUTING Revision: 1.2
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*/
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#ifndef _NETINET6_IP6_MROUTE_H_
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#define _NETINET6_IP6_MROUTE_H_
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/*
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* Multicast Routing set/getsockopt commands.
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*/
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#ifdef _KERNEL
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#define MRT6_OINIT 100 /* initialize forwarder (omrt6msg) */
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#endif
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#define MRT6_DONE 101 /* shut down forwarder */
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#define MRT6_ADD_MIF 102 /* add multicast interface */
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#define MRT6_DEL_MIF 103 /* delete multicast interface */
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#define MRT6_ADD_MFC 104 /* insert forwarding cache entry */
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#define MRT6_DEL_MFC 105 /* delete forwarding cache entry */
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#define MRT6_PIM 107 /* enable pim code */
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#define MRT6_INIT 108 /* initialize forwarder (mrt6msg) */
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#if BSD >= 199103
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#define GET_TIME(t) microtime(&t)
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#elif defined(sun)
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#define GET_TIME(t) uniqtime(&t)
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#else
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#define GET_TIME(t) ((t) = time)
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#endif
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/*
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* Types and macros for handling bitmaps with one bit per multicast interface.
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*/
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typedef u_short mifi_t; /* type of a mif index */
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#define MAXMIFS 64
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#ifndef IF_SETSIZE
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#define IF_SETSIZE 256
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#endif
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typedef u_int32_t if_mask;
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#define NIFBITS (sizeof(if_mask) * NBBY) /* bits per mask */
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#ifndef howmany
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#define howmany(x, y) (((x) + ((y) - 1)) / (y))
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#endif
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typedef struct if_set {
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if_mask ifs_bits[howmany(IF_SETSIZE, NIFBITS)];
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} if_set;
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#define IF_SET(n, p) ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
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#define IF_CLR(n, p) ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
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#define IF_ISSET(n, p) ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
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#define IF_COPY(f, t) bcopy(f, t, sizeof(*(f)))
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#define IF_ZERO(p) bzero(p, sizeof(*(p)))
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/*
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* Argument structure for MRT6_ADD_IF.
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*/
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struct mif6ctl {
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mifi_t mif6c_mifi; /* the index of the mif to be added */
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u_char mif6c_flags; /* MIFF_ flags defined below */
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u_short mif6c_pifi; /* the index of the physical IF */
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};
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#define MIFF_REGISTER 0x1 /* mif represents a register end-point */
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/*
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* Argument structure for MRT6_ADD_MFC and MRT6_DEL_MFC
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*/
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struct mf6cctl {
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struct sockaddr_in6 mf6cc_origin; /* IPv6 origin of mcasts */
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struct sockaddr_in6 mf6cc_mcastgrp; /* multicast group associated */
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mifi_t mf6cc_parent; /* incoming ifindex */
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struct if_set mf6cc_ifset; /* set of forwarding ifs */
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};
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/*
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* The kernel's multicast routing statistics.
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*/
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struct mrt6stat {
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u_quad_t mrt6s_mfc_lookups; /* # forw. cache hash table hits */
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u_quad_t mrt6s_mfc_misses; /* # forw. cache hash table misses */
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u_quad_t mrt6s_upcalls; /* # calls to multicast routing daemon */
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u_quad_t mrt6s_no_route; /* no route for packet's origin */
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u_quad_t mrt6s_bad_tunnel; /* malformed tunnel options */
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u_quad_t mrt6s_cant_tunnel; /* no room for tunnel options */
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u_quad_t mrt6s_wrong_if; /* arrived on wrong interface */
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u_quad_t mrt6s_upq_ovflw; /* upcall Q overflow */
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u_quad_t mrt6s_cache_cleanups; /* # entries with no upcalls */
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u_quad_t mrt6s_drop_sel; /* pkts dropped selectively */
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u_quad_t mrt6s_q_overflow; /* pkts dropped - Q overflow */
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u_quad_t mrt6s_pkt2large; /* pkts dropped - size > BKT SIZE */
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u_quad_t mrt6s_upq_sockfull; /* upcalls dropped - socket full */
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};
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#ifdef MRT6_OINIT
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/*
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* Struct used to communicate from kernel to multicast router
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* note the convenient similarity to an IPv6 header.
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* XXX old version, superseded by mrt6msg.
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*/
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struct omrt6msg {
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u_long unused1;
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u_char im6_msgtype; /* what type of message */
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#if 0
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#define MRT6MSG_NOCACHE 1
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#define MRT6MSG_WRONGMIF 2
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#define MRT6MSG_WHOLEPKT 3 /* used for user level encap*/
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#endif
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u_char im6_mbz; /* must be zero */
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u_char im6_mif; /* mif rec'd on */
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u_char unused2;
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struct in6_addr im6_src, im6_dst;
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};
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#endif
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/*
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* Structure used to communicate from kernel to multicast router.
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* We'll overlay the structure onto an MLD header (not an IPv6 header
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* like igmpmsg{} used for IPv4 implementation). This is because this
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* structure will be passed via an IPv6 raw socket, on which an application
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* will only receive the payload i.e. the data after the IPv6 header and all
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* the extension headers. (see Section 3 of RFC3542)
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*/
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struct mrt6msg {
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#define MRT6MSG_NOCACHE 1
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#define MRT6MSG_WRONGMIF 2
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#define MRT6MSG_WHOLEPKT 3 /* used for user level encap*/
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u_char im6_mbz; /* must be zero */
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u_char im6_msgtype; /* what type of message */
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u_int16_t im6_mif; /* mif rec'd on */
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u_int32_t im6_pad; /* padding for 64bit arch */
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struct in6_addr im6_src, im6_dst;
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};
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/*
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* Argument structure used by multicast routing daemon to get src-grp
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* packet counts
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*/
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struct sioc_sg_req6 {
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struct sockaddr_in6 src;
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struct sockaddr_in6 grp;
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u_quad_t pktcnt;
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u_quad_t bytecnt;
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u_quad_t wrong_if;
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};
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/*
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* Argument structure used by mrouted to get mif pkt counts
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*/
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struct sioc_mif_req6 {
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mifi_t mifi; /* mif number */
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u_quad_t icount; /* Input packet count on mif */
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u_quad_t ocount; /* Output packet count on mif */
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u_quad_t ibytes; /* Input byte count on mif */
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u_quad_t obytes; /* Output byte count on mif */
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};
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#if defined(_KERNEL) || defined(KERNEL)
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/*
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* The kernel's multicast-interface structure.
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*/
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struct mif6 {
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u_char m6_flags; /* MIFF_ flags defined above */
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u_int m6_rate_limit; /* max rate */
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struct in6_addr m6_lcl_addr; /* local interface address */
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struct ifnet *m6_ifp; /* pointer to interface */
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u_quad_t m6_pkt_in; /* # pkts in on interface */
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u_quad_t m6_pkt_out; /* # pkts out on interface */
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u_quad_t m6_bytes_in; /* # bytes in on interface */
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u_quad_t m6_bytes_out; /* # bytes out on interface */
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struct route_in6 m6_route; /* cached route */
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#ifdef notyet
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u_int m6_rsvp_on; /* RSVP listening on this vif */
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struct socket *m6_rsvpd; /* RSVP daemon socket */
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#endif
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};
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/*
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* The kernel's multicast forwarding cache entry structure
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*/
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struct mf6c {
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struct sockaddr_in6 mf6c_origin; /* IPv6 origin of mcasts */
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struct sockaddr_in6 mf6c_mcastgrp; /* multicast group associated*/
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mifi_t mf6c_parent; /* incoming IF */
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struct if_set mf6c_ifset; /* set of outgoing IFs */
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u_quad_t mf6c_pkt_cnt; /* pkt count for src-grp */
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u_quad_t mf6c_byte_cnt; /* byte count for src-grp */
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u_quad_t mf6c_wrong_if; /* wrong if for src-grp */
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int mf6c_expire; /* time to clean entry up */
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struct timeval mf6c_last_assert; /* last time I sent an assert*/
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struct rtdetq *mf6c_stall; /* pkts waiting for route */
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struct mf6c *mf6c_next; /* hash table linkage */
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};
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#define MF6C_INCOMPLETE_PARENT ((mifi_t)-1)
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/*
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* Argument structure used for pkt info. while upcall is made
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*/
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#ifndef _NETINET_IP_MROUTE_H_
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struct rtdetq { /* XXX: rtdetq is also defined in ip_mroute.h */
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struct mbuf *m; /* A copy of the packet */
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struct ifnet *ifp; /* Interface pkt came in on */
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#ifdef UPCALL_TIMING
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struct timeval t; /* Timestamp */
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#endif /* UPCALL_TIMING */
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struct rtdetq *next;
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};
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#endif /* _NETINET_IP_MROUTE_H_ */
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#define MF6CTBLSIZ 256
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#if (MF6CTBLSIZ & (MF6CTBLSIZ - 1)) == 0 /* from sys:route.h */
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#define MF6CHASHMOD(h) ((h) & (MF6CTBLSIZ - 1))
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#else
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#define MF6CHASHMOD(h) ((h) % MF6CTBLSIZ)
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#endif
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#define MAX_UPQ6 4 /* max. no of pkts in upcall Q */
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extern int (*ip6_mrouter_set)(struct socket *so, struct sockopt *sopt);
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extern int (*ip6_mrouter_get)(struct socket *so, struct sockopt *sopt);
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extern int (*ip6_mrouter_done)(void);
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extern int (*mrt6_ioctl)(int, caddr_t);
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#endif /* _KERNEL */
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#endif /* !_NETINET6_IP6_MROUTE_H_ */
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