FreeBSD/Linux Kernel Cross Reference
sys/netinet6/ip6_mroute.h

     /*-
      * 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.
     *
     *      $KAME: ip6_mroute.h,v 1.19 2001/06/14 06:12:55 suz Exp $
     * $FreeBSD: releng/8.4/sys/netinet6/ip6_mroute.h 194581 2009-06-21 10:29:31Z rdivacky $
     */
    
    /*      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) */
    
    #if BSD >= 199103
    #define GET_TIME(t)     microtime(&t)
    #elif defined(sun)
    #define GET_TIME(t)     uniqtime(&t)
    #else
    #define GET_TIME(t)     ((t) = time)
    #endif
    
    /*
     * 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 */
   };
   
   #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 multicast routing daemon */
           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 RFC3542)
    */
   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                          */
           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_in6 m6_route;      /* cached route */
   #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 */
   
   extern int      (*ip6_mrouter_set)(struct socket *so, struct sockopt *sopt);
   extern int      (*ip6_mrouter_get)(struct socket *so, struct sockopt *sopt);
   extern int      (*ip6_mrouter_done)(void);
   extern int      (*mrt6_ioctl)(u_long, caddr_t);
   #endif /* _KERNEL */
   
   #endif /* !_NETINET6_IP6_MROUTE_H_ */

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