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/*!\file netinet/ip_mrout.h
* IP multicast forwarding.
*/
/*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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
* $Id: ip_mroute.h,v 1.10.4.1 1997/02/22 19:47:28 joerg 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.
*
* MROUTING Revision: 3.3.1.3
*/
/*
* 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 PIM assert processing */
#define GET_TIME(t) microtime(&t)
/*
* 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 /* vif represents a tunnel end-point */
#define VIFF_SRCRT 0x2 /* tunnel uses IP source routing */
/*
* Argument structure for MRT_ADD_MFC and MRT_DEL_MFC
* (mfcc_tos to be added at a future point)
*/
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 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 */
};
/*
* 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*/
u_int v_rate_limit; /* max rate */
struct tbf *v_tbf; /* token bucket structure at intf. */
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 */
u_int v_rsvp_on; /* RSVP listening on this vif */
struct socket *v_rsvpd; /* RSVP daemon socket */
};
/*
* 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 {
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*/
};
/*
* Struct used to communicate from kernel to multicast router
* note the convenient similarity to an IP packet
*/
struct igmpmsg {
u_long unused1;
u_long unused2;
u_char im_msgtype; /* what type of message */
#define IGMPMSG_NOCACHE 1
#define IGMPMSG_WRONGVIF 2
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 {
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 */
#ifdef UPCALL_TIMING
struct timeval t; /* Timestamp */
#endif
};
#define MFCTBLSIZ 256
#if (MFCTBLSIZ & (MFCTBLSIZ - 1)) == 0 /* from sys:route.h */
#define MFCHASHMOD(h) ((h) & (MFCTBLSIZ - 1))
#else
#define MFCHASHMOD(h) ((h) % MFCTBLSIZ)
#endif
#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 # of pkts in queue */
/*
* the token bucket filter at each vif
*/
struct tbf
{
struct timeval tbf_last_pkt_t; /* arr. time of last pkt */
u_long tbf_n_tok; /* no of tokens in bucket */
u_long tbf_q_len; /* length of queue at this vif */
u_long tbf_max_q_len; /* max. queue length */
struct mbuf *tbf_q; /* Packet queue */
struct mbuf *tbf_t; /* tail-insertion pointer */
};
#endif