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

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    1 /*      $FreeBSD: src/sys/netinet6/ip6_mroute.h,v 1.5 2002/04/19 04:46:23 suz Exp $     */
    2 /*      $KAME: ip6_mroute.h,v 1.19 2001/06/14 06:12:55 suz Exp $        */
    3 
    4 /*
    5  * Copyright (C) 1998 WIDE Project.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. Neither the name of the project nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  */
   32 
   33 /*      BSDI ip_mroute.h,v 2.5 1996/10/11 16:01:48 pjd Exp      */
   34 
   35 /*
   36  * Definitions for IP multicast forwarding.
   37  *
   38  * Written by David Waitzman, BBN Labs, August 1988.
   39  * Modified by Steve Deering, Stanford, February 1989.
   40  * Modified by Ajit Thyagarajan, PARC, August 1993.
   41  * Modified by Ajit Thyagarajan, PARC, August 1994.
   42  * Modified by Ahmed Helmy, USC, September 1996.
   43  *
   44  * MROUTING Revision: 1.2
   45  */
   46 
   47 #ifndef _NETINET6_IP6_MROUTE_H_
   48 #define _NETINET6_IP6_MROUTE_H_
   49 
   50 /*
   51  * Multicast Routing set/getsockopt commands.
   52  */
   53 #ifdef _KERNEL
   54 #define MRT6_OINIT              100     /* initialize forwarder (omrt6msg) */
   55 #endif
   56 #define MRT6_DONE               101     /* shut down forwarder */
   57 #define MRT6_ADD_MIF            102     /* add multicast interface */
   58 #define MRT6_DEL_MIF            103     /* delete multicast interface */
   59 #define MRT6_ADD_MFC            104     /* insert forwarding cache entry */
   60 #define MRT6_DEL_MFC            105     /* delete forwarding cache entry */
   61 #define MRT6_PIM                107     /* enable pim code */
   62 #define MRT6_INIT               108     /* initialize forwarder (mrt6msg) */
   63 
   64 #if BSD >= 199103
   65 #define GET_TIME(t)     microtime(&t)
   66 #elif defined(sun)
   67 #define GET_TIME(t)     uniqtime(&t)
   68 #else
   69 #define GET_TIME(t)     ((t) = time)
   70 #endif
   71 
   72 /*
   73  * Types and macros for handling bitmaps with one bit per multicast interface.
   74  */
   75 typedef u_short mifi_t;         /* type of a mif index */
   76 #define MAXMIFS         64
   77 
   78 #ifndef IF_SETSIZE
   79 #define IF_SETSIZE      256
   80 #endif
   81 
   82 typedef u_int32_t       if_mask;
   83 #define NIFBITS (sizeof(if_mask) * NBBY)        /* bits per mask */
   84 
   85 #ifndef howmany
   86 #define howmany(x, y)   (((x) + ((y) - 1)) / (y))
   87 #endif
   88 
   89 typedef struct if_set {
   90         if_mask ifs_bits[howmany(IF_SETSIZE, NIFBITS)];
   91 } if_set;
   92 
   93 #define IF_SET(n, p)    ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
   94 #define IF_CLR(n, p)    ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
   95 #define IF_ISSET(n, p)  ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
   96 #define IF_COPY(f, t)   bcopy(f, t, sizeof(*(f)))
   97 #define IF_ZERO(p)      bzero(p, sizeof(*(p)))
   98 
   99 /*
  100  * Argument structure for MRT6_ADD_IF.
  101  */
  102 struct mif6ctl {
  103         mifi_t      mif6c_mifi;         /* the index of the mif to be added  */
  104         u_char      mif6c_flags;        /* MIFF_ flags defined below         */
  105         u_short     mif6c_pifi;         /* the index of the physical IF */
  106 #ifdef notyet
  107         u_int       mif6c_rate_limit;    /* max rate                         */
  108 #endif
  109 };
  110 
  111 #define MIFF_REGISTER   0x1     /* mif represents a register end-point */
  112 
  113 /*
  114  * Argument structure for MRT6_ADD_MFC and MRT6_DEL_MFC
  115  */
  116 struct mf6cctl {
  117         struct sockaddr_in6 mf6cc_origin;       /* IPv6 origin of mcasts */
  118         struct sockaddr_in6 mf6cc_mcastgrp; /* multicast group associated */
  119         mifi_t          mf6cc_parent;   /* incoming ifindex */
  120         struct if_set   mf6cc_ifset;    /* set of forwarding ifs */
  121 };
  122 
  123 /*
  124  * The kernel's multicast routing statistics.
  125  */
  126 struct mrt6stat {
  127         u_quad_t mrt6s_mfc_lookups;     /* # forw. cache hash table hits   */
  128         u_quad_t mrt6s_mfc_misses;      /* # forw. cache hash table misses */
  129         u_quad_t mrt6s_upcalls;         /* # calls to mrouted              */
  130         u_quad_t mrt6s_no_route;        /* no route for packet's origin    */
  131         u_quad_t mrt6s_bad_tunnel;      /* malformed tunnel options        */
  132         u_quad_t mrt6s_cant_tunnel;     /* no room for tunnel options      */
  133         u_quad_t mrt6s_wrong_if;        /* arrived on wrong interface      */
  134         u_quad_t mrt6s_upq_ovflw;       /* upcall Q overflow               */
  135         u_quad_t mrt6s_cache_cleanups;  /* # entries with no upcalls       */
  136         u_quad_t mrt6s_drop_sel;        /* pkts dropped selectively        */
  137         u_quad_t mrt6s_q_overflow;      /* pkts dropped - Q overflow       */
  138         u_quad_t mrt6s_pkt2large;       /* pkts dropped - size > BKT SIZE  */
  139         u_quad_t mrt6s_upq_sockfull;    /* upcalls dropped - socket full   */
  140 };
  141 
  142 #ifdef MRT6_OINIT
  143 /*
  144  * Struct used to communicate from kernel to multicast router
  145  * note the convenient similarity to an IPv6 header.
  146  * XXX old version, superseded by mrt6msg.
  147  */
  148 struct omrt6msg {
  149         u_long      unused1;
  150         u_char      im6_msgtype;                /* what type of message     */
  151 #if 0
  152 #define MRT6MSG_NOCACHE 1
  153 #define MRT6MSG_WRONGMIF        2
  154 #define MRT6MSG_WHOLEPKT        3               /* used for user level encap*/
  155 #endif
  156         u_char      im6_mbz;                    /* must be zero             */
  157         u_char      im6_mif;                    /* mif rec'd on             */
  158         u_char      unused2;
  159         struct in6_addr  im6_src, im6_dst;
  160 };
  161 #endif
  162 
  163 /*
  164  * Structure used to communicate from kernel to multicast router.
  165  * We'll overlay the structure onto an MLD header (not an IPv6 header
  166  * like igmpmsg{} used for IPv4 implementation). This is because this
  167  * structure will be passed via an IPv6 raw socket, on which an application
  168  * will only receive the payload i.e. the data after the IPv6 header and all
  169  * the extension headers. (see Section 3 of draft-ietf-ipngwg-2292bis-01)
  170  */
  171 struct mrt6msg {
  172 #define MRT6MSG_NOCACHE         1
  173 #define MRT6MSG_WRONGMIF        2
  174 #define MRT6MSG_WHOLEPKT        3               /* used for user level encap*/
  175         u_char      im6_mbz;                    /* must be zero             */
  176         u_char      im6_msgtype;                /* what type of message     */
  177         u_int16_t   im6_mif;                    /* mif rec'd on             */
  178         u_int32_t   im6_pad;                    /* padding for 64bit arch   */
  179         struct in6_addr  im6_src, im6_dst;
  180 };
  181 
  182 /*
  183  * Argument structure used by multicast routing daemon to get src-grp
  184  * packet counts
  185  */
  186 struct sioc_sg_req6 {
  187         struct sockaddr_in6 src;
  188         struct sockaddr_in6 grp;
  189         u_quad_t pktcnt;
  190         u_quad_t bytecnt;
  191         u_quad_t wrong_if;
  192 };
  193 
  194 /*
  195  * Argument structure used by mrouted to get mif pkt counts
  196  */
  197 struct sioc_mif_req6 {
  198         mifi_t mifi;            /* mif number                           */
  199         u_quad_t icount;        /* Input packet count on mif            */
  200         u_quad_t ocount;        /* Output packet count on mif           */
  201         u_quad_t ibytes;        /* Input byte count on mif              */
  202         u_quad_t obytes;        /* Output byte count on mif             */
  203 };
  204 
  205 #if defined(_KERNEL) || defined(KERNEL)
  206 /*
  207  * The kernel's multicast-interface structure.
  208  */
  209 struct mif6 {
  210         u_char          m6_flags;       /* MIFF_ flags defined above         */
  211         u_int           m6_rate_limit;  /* max rate                          */
  212 #ifdef notyet
  213         struct tbf      *m6_tbf;        /* token bucket structure at intf.   */
  214 #endif
  215         struct in6_addr m6_lcl_addr;    /* local interface address           */
  216         struct ifnet    *m6_ifp;        /* pointer to interface              */
  217         u_quad_t        m6_pkt_in;      /* # pkts in on interface            */
  218         u_quad_t        m6_pkt_out;     /* # pkts out on interface           */
  219         u_quad_t        m6_bytes_in;    /* # bytes in on interface           */
  220         u_quad_t        m6_bytes_out;   /* # bytes out on interface          */
  221         struct route_in6 m6_route;/* cached route if this is a tunnel */
  222 #ifdef notyet
  223         u_int           m6_rsvp_on;     /* RSVP listening on this vif */
  224         struct socket   *m6_rsvpd;      /* RSVP daemon socket */
  225 #endif
  226 };
  227 
  228 /*
  229  * The kernel's multicast forwarding cache entry structure
  230  */
  231 struct mf6c {
  232         struct sockaddr_in6  mf6c_origin;       /* IPv6 origin of mcasts     */
  233         struct sockaddr_in6  mf6c_mcastgrp;     /* multicast group associated*/
  234         mifi_t           mf6c_parent;           /* incoming IF               */
  235         struct if_set    mf6c_ifset;            /* set of outgoing IFs */
  236 
  237         u_quad_t        mf6c_pkt_cnt;           /* pkt count for src-grp     */
  238         u_quad_t        mf6c_byte_cnt;          /* byte count for src-grp    */
  239         u_quad_t        mf6c_wrong_if;          /* wrong if for src-grp      */
  240         int             mf6c_expire;            /* time to clean entry up    */
  241         struct timeval  mf6c_last_assert;       /* last time I sent an assert*/
  242         struct rtdetq  *mf6c_stall;             /* pkts waiting for route */
  243         struct mf6c    *mf6c_next;              /* hash table linkage */
  244 };
  245 
  246 #define MF6C_INCOMPLETE_PARENT ((mifi_t)-1)
  247 
  248 /*
  249  * Argument structure used for pkt info. while upcall is made
  250  */
  251 #ifndef _NETINET_IP_MROUTE_H_
  252 struct rtdetq {         /* XXX: rtdetq is also defined in ip_mroute.h */
  253     struct mbuf         *m;             /* A copy of the packet             */
  254     struct ifnet        *ifp;           /* Interface pkt came in on         */
  255 #ifdef UPCALL_TIMING
  256     struct timeval      t;              /* Timestamp */
  257 #endif /* UPCALL_TIMING */
  258     struct rtdetq       *next;
  259 };
  260 #endif /* _NETINET_IP_MROUTE_H_ */
  261 
  262 #define MF6CTBLSIZ      256
  263 #if (MF6CTBLSIZ & (MF6CTBLSIZ - 1)) == 0          /* from sys:route.h */
  264 #define MF6CHASHMOD(h)  ((h) & (MF6CTBLSIZ - 1))
  265 #else
  266 #define MF6CHASHMOD(h)  ((h) % MF6CTBLSIZ)
  267 #endif
  268 
  269 #define MAX_UPQ6        4               /* max. no of pkts in upcall Q */
  270 
  271 int     ip6_mrouter_set __P((struct socket *so, struct sockopt *sopt));
  272 int     ip6_mrouter_get __P((struct socket *so, struct sockopt *sopt));
  273 int     ip6_mrouter_done __P((void));
  274 int     mrt6_ioctl __P((int, caddr_t));
  275 #endif /* _KERNEL */
  276 
  277 #endif /* !_NETINET6_IP6_MROUTE_H_ */

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