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//==========================================================================

//

//      include/netinet6/ip6_mroute.h

//

//==========================================================================

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//

// Portions of this software may have been derived from OpenBSD, 

// FreeBSD or other sources, and are covered by the appropriate

// copyright disclaimers included herein.

//

// Portions created by Red Hat are

// Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.

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//####BSDCOPYRIGHTEND####

//==========================================================================

/*      $KAME: ip6_mroute.h,v 1.19 2001/06/14 06:12:55 suz Exp $        */

/*

 * Copyright (C) 1998 WIDE Project.

 * All rights reserved.

 *

 * 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 project 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 PROJECT 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 PROJECT 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.

 */

/*      BSDI ip_mroute.h,v 2.5 1996/10/11 16:01:48 pjd Exp      */

/*

 * 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, USC, September 1996.

 *

 * MROUTING Revision: 1.2

 */

#ifndef _NETINET6_IP6_MROUTE_H_

#define _NETINET6_IP6_MROUTE_H_

/*

 * Multicast Routing set/getsockopt commands.

 */

#ifdef _KERNEL

#define MRT6_OINIT              100     /* initialize forwarder (omrt6msg) */

#endif

#define MRT6_DONE               101     /* shut down forwarder */

#define MRT6_ADD_MIF            102     /* add multicast interface */

#define MRT6_DEL_MIF            103     /* delete multicast interface */

#define MRT6_ADD_MFC            104     /* insert forwarding cache entry */

#define MRT6_DEL_MFC            105     /* delete forwarding cache entry */

#define MRT6_PIM                107     /* enable pim code */

#define MRT6_INIT               108     /* initialize forwarder (mrt6msg) */

#define GET_TIME(t)     microtime(&t)

/*

 * Types and macros for handling bitmaps with one bit per multicast interface.

 */

typedef u_short mifi_t;         /* type of a mif index */

#define MAXMIFS         64

#ifndef IF_SETSIZE

#define IF_SETSIZE      256

#endif

typedef u_int32_t       if_mask;

#define NIFBITS (sizeof(if_mask) * NBBY)        /* bits per mask */

#ifndef howmany

#define howmany(x, y)   (((x) + ((y) - 1)) / (y))

#endif

typedef struct if_set {

        if_mask ifs_bits[howmany(IF_SETSIZE, NIFBITS)];

} if_set;

#define IF_SET(n, p)    ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))

#define IF_CLR(n, p)    ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))

#define IF_ISSET(n, p)  ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))

#define IF_COPY(f, t)   bcopy(f, t, sizeof(*(f)))

#define IF_ZERO(p)      bzero(p, sizeof(*(p)))

/*

 * Argument structure for MRT6_ADD_IF.

 */

struct mif6ctl {

        mifi_t      mif6c_mifi;         /* the index of the mif to be added  */

        u_char      mif6c_flags;        /* MIFF_ flags defined below         */

        u_short     mif6c_pifi;         /* the index of the physical IF */

#ifdef notyet

        u_int       mif6c_rate_limit;    /* max rate                         */

#endif

};

#define MIFF_REGISTER   0x1     /* mif represents a register end-point */

/*

 * Argument structure for MRT6_ADD_MFC and MRT6_DEL_MFC

 */

struct mf6cctl {

        struct sockaddr_in6 mf6cc_origin;       /* IPv6 origin of mcasts */

        struct sockaddr_in6 mf6cc_mcastgrp; /* multicast group associated */

        mifi_t          mf6cc_parent;   /* incoming ifindex */

        struct if_set   mf6cc_ifset;    /* set of forwarding ifs */

};

/*

 * The kernel's multicast routing statistics.

 */

struct mrt6stat {

        u_quad_t mrt6s_mfc_lookups;     /* # forw. cache hash table hits   */

        u_quad_t mrt6s_mfc_misses;      /* # forw. cache hash table misses */

        u_quad_t mrt6s_upcalls;         /* # calls to mrouted              */

        u_quad_t mrt6s_no_route;        /* no route for packet's origin    */

        u_quad_t mrt6s_bad_tunnel;      /* malformed tunnel options        */

        u_quad_t mrt6s_cant_tunnel;     /* no room for tunnel options      */

        u_quad_t mrt6s_wrong_if;        /* arrived on wrong interface      */

        u_quad_t mrt6s_upq_ovflw;       /* upcall Q overflow               */

        u_quad_t mrt6s_cache_cleanups;  /* # entries with no upcalls       */

        u_quad_t mrt6s_drop_sel;        /* pkts dropped selectively        */

        u_quad_t mrt6s_q_overflow;      /* pkts dropped - Q overflow       */

        u_quad_t mrt6s_pkt2large;       /* pkts dropped - size > BKT SIZE  */

        u_quad_t mrt6s_upq_sockfull;    /* upcalls dropped - socket full   */

};

#ifdef MRT6_OINIT

/*

 * Struct used to communicate from kernel to multicast router

 * note the convenient similarity to an IPv6 header.

 * XXX old version, superseded by mrt6msg.

 */

struct omrt6msg {

        u_long      unused1;

        u_char      im6_msgtype;                /* what type of message     */

#if 0

#define MRT6MSG_NOCACHE 1

#define MRT6MSG_WRONGMIF        2

#define MRT6MSG_WHOLEPKT        3               /* used for user level encap*/

#endif

        u_char      im6_mbz;                    /* must be zero             */

        u_char      im6_mif;                    /* mif rec'd on             */

        u_char      unused2;

        struct in6_addr  im6_src, im6_dst;

};

#endif

/*

 * Structure used to communicate from kernel to multicast router.

 * We'll overlay the structure onto an MLD header (not an IPv6 header

 * like igmpmsg{} used for IPv4 implementation). This is because this

 * structure will be passed via an IPv6 raw socket, on which an application

 * will only receive the payload i.e. the data after the IPv6 header and all

 * the extension headers. (see Section 3 of draft-ietf-ipngwg-2292bis-01)

 */

struct mrt6msg {

#define MRT6MSG_NOCACHE         1

#define MRT6MSG_WRONGMIF        2

#define MRT6MSG_WHOLEPKT        3               /* used for user level encap*/

        u_char      im6_mbz;                    /* must be zero             */

        u_char      im6_msgtype;                /* what type of message     */

        u_int16_t   im6_mif;                    /* mif rec'd on             */

        u_int32_t   im6_pad;                    /* padding for 64bit arch   */

        struct in6_addr  im6_src, im6_dst;

};

/*

 * Argument structure used by multicast routing daemon to get src-grp

 * packet counts

 */

struct sioc_sg_req6 {

        struct sockaddr_in6 src;

        struct sockaddr_in6 grp;

        u_quad_t pktcnt;

        u_quad_t bytecnt;

        u_quad_t wrong_if;

};

/*

 * Argument structure used by mrouted to get mif pkt counts

 */

struct sioc_mif_req6 {

        mifi_t mifi;            /* mif number                           */

        u_quad_t icount;        /* Input packet count on mif            */

        u_quad_t ocount;        /* Output packet count on mif           */

        u_quad_t ibytes;        /* Input byte count on mif              */

        u_quad_t obytes;        /* Output byte count on mif             */

};

#if defined(_KERNEL) || defined(KERNEL)

/*

 * The kernel's multicast-interface structure.

 */

struct mif6 {

        u_char          m6_flags;       /* MIFF_ flags defined above         */

        u_int           m6_rate_limit;  /* max rate                          */

#ifdef notyet

        struct tbf      *m6_tbf;        /* token bucket structure at intf.   */

#endif

        struct in6_addr m6_lcl_addr;    /* local interface address           */

        struct ifnet    *m6_ifp;        /* pointer to interface              */

        u_quad_t        m6_pkt_in;      /* # pkts in on interface            */

        u_quad_t        m6_pkt_out;     /* # pkts out on interface           */

        u_quad_t        m6_bytes_in;    /* # bytes in on interface           */

        u_quad_t        m6_bytes_out;   /* # bytes out on interface          */

        struct route m6_route;/* cached route if this is a tunnel */

#ifdef notyet

        u_int           m6_rsvp_on;     /* RSVP listening on this vif */

        struct socket   *m6_rsvpd;      /* RSVP daemon socket */

#endif

};

/*

 * The kernel's multicast forwarding cache entry structure

 */

struct mf6c {

        struct sockaddr_in6  mf6c_origin;       /* IPv6 origin of mcasts     */

        struct sockaddr_in6  mf6c_mcastgrp;     /* multicast group associated*/

        mifi_t           mf6c_parent;           /* incoming IF               */

        struct if_set    mf6c_ifset;            /* set of outgoing IFs */

        u_quad_t        mf6c_pkt_cnt;           /* pkt count for src-grp     */

        u_quad_t        mf6c_byte_cnt;          /* byte count for src-grp    */

        u_quad_t        mf6c_wrong_if;          /* wrong if for src-grp      */

        int             mf6c_expire;            /* time to clean entry up    */

        struct timeval  mf6c_last_assert;       /* last time I sent an assert*/

        struct rtdetq  *mf6c_stall;             /* pkts waiting for route */

        struct mf6c    *mf6c_next;              /* hash table linkage */

};

#define MF6C_INCOMPLETE_PARENT ((mifi_t)-1)

/*

 * Argument structure used for pkt info. while upcall is made

 */

#ifndef _NETINET_IP_MROUTE_H_

struct rtdetq {         /* XXX: rtdetq is also defined in ip_mroute.h */

    struct mbuf         *m;             /* A copy of the packet             */

    struct ifnet        *ifp;           /* Interface pkt came in on         */

#ifdef UPCALL_TIMING

    struct timeval      t;              /* Timestamp */

#endif /* UPCALL_TIMING */

    struct rtdetq       *next;

};

#endif /* _NETINET_IP_MROUTE_H_ */

#define MF6CTBLSIZ      256

#if (MF6CTBLSIZ & (MF6CTBLSIZ - 1)) == 0          /* from sys:route.h */

#define MF6CHASHMOD(h)  ((h) & (MF6CTBLSIZ - 1))

#else

#define MF6CHASHMOD(h)  ((h) % MF6CTBLSIZ)

#endif

#define MAX_UPQ6        4               /* max. no of pkts in upcall Q */

int     ip6_mrouter_set __P((struct socket *so, struct sockopt *sopt));

int     ip6_mrouter_get __P((struct socket *so, struct sockopt *sopt));

int     ip6_mrouter_done __P((void));

int     mrt6_ioctl __P((int, caddr_t));

#endif /* _KERNEL */

#endif /* !_NETINET6_IP6_MROUTE_H_ */