--- /dev/null
+/*!\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
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