The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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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 1.2.2.3 2002/04/28 05:40:27 suz Exp $ */
    2 /*      $DragonFly: src/sys/netinet6/ip6_mroute.h,v 1.4 2006/05/20 02:42:12 dillon Exp $        */
    3 /*      $KAME: ip6_mroute.h,v 1.19 2001/06/14 06:12:55 suz Exp $        */
    4 
    5 /*
    6  * Copyright (C) 1998 WIDE Project.
    7  * All rights reserved.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. Neither the name of the project nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  */
   33 
   34 /*      BSDI ip_mroute.h,v 2.5 1996/10/11 16:01:48 pjd Exp      */
   35 
   36 /*
   37  * Definitions for IP multicast forwarding.
   38  *
   39  * Written by David Waitzman, BBN Labs, August 1988.
   40  * Modified by Steve Deering, Stanford, February 1989.
   41  * Modified by Ajit Thyagarajan, PARC, August 1993.
   42  * Modified by Ajit Thyagarajan, PARC, August 1994.
   43  * Modified by Ahmed Helmy, USC, September 1996.
   44  *
   45  * MROUTING Revision: 1.2
   46  */
   47 
   48 #ifndef _NETINET6_IP6_MROUTE_H_
   49 #define _NETINET6_IP6_MROUTE_H_
   50 
   51 #ifndef _SYS_TYPES_H_
   52 #include <sys/types.h>
   53 #endif
   54 #ifndef _SYS_TIME_H_
   55 #include <sys/time.h>
   56 #endif
   57 #ifndef _SYS_SOCKET_H_
   58 #include <sys/socket.h>
   59 #endif
   60 #ifndef _NETINET_IN_H_
   61 #include <netinet/in.h>
   62 #endif
   63 
   64 /*
   65  * Multicast Routing set/getsockopt commands.
   66  */
   67 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
   68 #define MRT6_OINIT              100     /* initialize forwarder (omrt6msg) */
   69 #endif
   70 #define MRT6_DONE               101     /* shut down forwarder */
   71 #define MRT6_ADD_MIF            102     /* add multicast interface */
   72 #define MRT6_DEL_MIF            103     /* delete multicast interface */
   73 #define MRT6_ADD_MFC            104     /* insert forwarding cache entry */
   74 #define MRT6_DEL_MFC            105     /* delete forwarding cache entry */
   75 #define MRT6_PIM                107     /* enable pim code */
   76 #define MRT6_INIT               108     /* initialize forwarder (mrt6msg) */
   77 
   78 #if BSD >= 199103
   79 #define GET_TIME(t)     microtime(&t)
   80 #elif defined(sun)
   81 #define GET_TIME(t)     uniqtime(&t)
   82 #else
   83 #define GET_TIME(t)     ((t) = time)
   84 #endif
   85 
   86 /*
   87  * Types and macros for handling bitmaps with one bit per multicast interface.
   88  */
   89 typedef u_short mifi_t;         /* type of a mif index */
   90 #define MAXMIFS         64
   91 
   92 #ifndef IF_SETSIZE
   93 #define IF_SETSIZE      256
   94 #endif
   95 
   96 typedef u_int32_t       if_mask;
   97 #define NIFBITS (sizeof(if_mask) * NBBY)        /* bits per mask */
   98 
   99 #ifndef howmany
  100 #define howmany(x, y)   (((x) + ((y) - 1)) / (y))
  101 #endif
  102 
  103 typedef struct if_set {
  104         if_mask ifs_bits[howmany(IF_SETSIZE, NIFBITS)];
  105 } if_set;
  106 
  107 #define IF_SET(n, p)    ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
  108 #define IF_CLR(n, p)    ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
  109 #define IF_ISSET(n, p)  ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
  110 #define IF_COPY(f, t)   bcopy(f, t, sizeof(*(f)))
  111 #define IF_ZERO(p)      bzero(p, sizeof(*(p)))
  112 
  113 /*
  114  * Argument structure for MRT6_ADD_IF.
  115  */
  116 struct mif6ctl {
  117         mifi_t      mif6c_mifi;         /* the index of the mif to be added  */
  118         u_char      mif6c_flags;        /* MIFF_ flags defined below         */
  119         u_short     mif6c_pifi;         /* the index of the physical IF */
  120 #ifdef notyet
  121         u_int       mif6c_rate_limit;    /* max rate                         */
  122 #endif
  123 };
  124 
  125 #define MIFF_REGISTER   0x1     /* mif represents a register end-point */
  126 
  127 /*
  128  * Argument structure for MRT6_ADD_MFC and MRT6_DEL_MFC
  129  */
  130 struct mf6cctl {
  131         struct sockaddr_in6 mf6cc_origin;       /* IPv6 origin of mcasts */
  132         struct sockaddr_in6 mf6cc_mcastgrp; /* multicast group associated */
  133         mifi_t          mf6cc_parent;   /* incoming ifindex */
  134         struct if_set   mf6cc_ifset;    /* set of forwarding ifs */
  135 };
  136 
  137 /*
  138  * The kernel's multicast routing statistics.
  139  */
  140 struct mrt6stat {
  141         u_quad_t mrt6s_mfc_lookups;     /* # forw. cache hash table hits   */
  142         u_quad_t mrt6s_mfc_misses;      /* # forw. cache hash table misses */
  143         u_quad_t mrt6s_upcalls;         /* # calls to mrouted              */
  144         u_quad_t mrt6s_no_route;        /* no route for packet's origin    */
  145         u_quad_t mrt6s_bad_tunnel;      /* malformed tunnel options        */
  146         u_quad_t mrt6s_cant_tunnel;     /* no room for tunnel options      */
  147         u_quad_t mrt6s_wrong_if;        /* arrived on wrong interface      */
  148         u_quad_t mrt6s_upq_ovflw;       /* upcall Q overflow               */
  149         u_quad_t mrt6s_cache_cleanups;  /* # entries with no upcalls       */
  150         u_quad_t mrt6s_drop_sel;        /* pkts dropped selectively        */
  151         u_quad_t mrt6s_q_overflow;      /* pkts dropped - Q overflow       */
  152         u_quad_t mrt6s_pkt2large;       /* pkts dropped - size > BKT SIZE  */
  153         u_quad_t mrt6s_upq_sockfull;    /* upcalls dropped - socket full   */
  154 };
  155 
  156 #ifdef MRT6_OINIT
  157 /*
  158  * Struct used to communicate from kernel to multicast router
  159  * note the convenient similarity to an IPv6 header.
  160  * XXX old version, superseded by mrt6msg.
  161  */
  162 struct omrt6msg {
  163         u_long      unused1;
  164         u_char      im6_msgtype;                /* what type of message     */
  165 #if 0
  166 #define MRT6MSG_NOCACHE 1
  167 #define MRT6MSG_WRONGMIF        2
  168 #define MRT6MSG_WHOLEPKT        3               /* used for user level encap*/
  169 #endif
  170         u_char      im6_mbz;                    /* must be zero             */
  171         u_char      im6_mif;                    /* mif rec'd on             */
  172         u_char      unused2;
  173         struct in6_addr  im6_src, im6_dst;
  174 };
  175 #endif
  176 
  177 /*
  178  * Structure used to communicate from kernel to multicast router.
  179  * We'll overlay the structure onto an MLD header (not an IPv6 header
  180  * like igmpmsg{} used for IPv4 implementation). This is because this
  181  * structure will be passed via an IPv6 raw socket, on which an application
  182  * will only receive the payload i.e. the data after the IPv6 header and all
  183  * the extension headers. (see Section 3 of draft-ietf-ipngwg-2292bis-01)
  184  */
  185 struct mrt6msg {
  186 #define MRT6MSG_NOCACHE         1
  187 #define MRT6MSG_WRONGMIF        2
  188 #define MRT6MSG_WHOLEPKT        3               /* used for user level encap*/
  189         u_char      im6_mbz;                    /* must be zero             */
  190         u_char      im6_msgtype;                /* what type of message     */
  191         u_int16_t   im6_mif;                    /* mif rec'd on             */
  192         u_int32_t   im6_pad;                    /* padding for 64bit arch   */
  193         struct in6_addr  im6_src, im6_dst;
  194 };
  195 
  196 /*
  197  * Argument structure used by multicast routing daemon to get src-grp
  198  * packet counts
  199  */
  200 struct sioc_sg_req6 {
  201         struct sockaddr_in6 src;
  202         struct sockaddr_in6 grp;
  203         u_quad_t pktcnt;
  204         u_quad_t bytecnt;
  205         u_quad_t wrong_if;
  206 };
  207 
  208 /*
  209  * Argument structure used by mrouted to get mif pkt counts
  210  */
  211 struct sioc_mif_req6 {
  212         mifi_t mifi;            /* mif number                           */
  213         u_quad_t icount;        /* Input packet count on mif            */
  214         u_quad_t ocount;        /* Output packet count on mif           */
  215         u_quad_t ibytes;        /* Input byte count on mif              */
  216         u_quad_t obytes;        /* Output byte count on mif             */
  217 };
  218 
  219 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) || defined(KERNEL)
  220 /*
  221  * The kernel's multicast-interface structure.
  222  */
  223 struct mif6 {
  224         u_char          m6_flags;       /* MIFF_ flags defined above         */
  225         u_int           m6_rate_limit;  /* max rate                          */
  226 #ifdef notyet
  227         struct tbf      *m6_tbf;        /* token bucket structure at intf.   */
  228 #endif
  229         struct in6_addr m6_lcl_addr;    /* local interface address           */
  230         struct ifnet    *m6_ifp;        /* pointer to interface              */
  231         u_quad_t        m6_pkt_in;      /* # pkts in on interface            */
  232         u_quad_t        m6_pkt_out;     /* # pkts out on interface           */
  233         u_quad_t        m6_bytes_in;    /* # bytes in on interface           */
  234         u_quad_t        m6_bytes_out;   /* # bytes out on interface          */
  235         struct route_in6 m6_route;/* cached route if this is a tunnel */
  236 #ifdef notyet
  237         u_int           m6_rsvp_on;     /* RSVP listening on this vif */
  238         struct socket   *m6_rsvpd;      /* RSVP daemon socket */
  239 #endif
  240 };
  241 
  242 /*
  243  * The kernel's multicast forwarding cache entry structure
  244  */
  245 struct mf6c {
  246         struct sockaddr_in6  mf6c_origin;       /* IPv6 origin of mcasts     */
  247         struct sockaddr_in6  mf6c_mcastgrp;     /* multicast group associated*/
  248         mifi_t           mf6c_parent;           /* incoming IF               */
  249         struct if_set    mf6c_ifset;            /* set of outgoing IFs */
  250 
  251         u_quad_t        mf6c_pkt_cnt;           /* pkt count for src-grp     */
  252         u_quad_t        mf6c_byte_cnt;          /* byte count for src-grp    */
  253         u_quad_t        mf6c_wrong_if;          /* wrong if for src-grp      */
  254         int             mf6c_expire;            /* time to clean entry up    */
  255         struct timeval  mf6c_last_assert;       /* last time I sent an assert*/
  256         struct rtdetq  *mf6c_stall;             /* pkts waiting for route */
  257         struct mf6c    *mf6c_next;              /* hash table linkage */
  258 };
  259 
  260 #define MF6C_INCOMPLETE_PARENT ((mifi_t)-1)
  261 
  262 /*
  263  * Argument structure used for pkt info. while upcall is made
  264  */
  265 #ifndef _NETINET_IP_MROUTE_H_
  266 struct rtdetq {         /* XXX: rtdetq is also defined in ip_mroute.h */
  267     struct mbuf         *m;             /* A copy of the packet             */
  268     struct ifnet        *ifp;           /* Interface pkt came in on         */
  269 #ifdef UPCALL_TIMING
  270     struct timeval      t;              /* Timestamp */
  271 #endif /* UPCALL_TIMING */
  272     struct rtdetq       *next;
  273 };
  274 #endif /* _NETINET_IP_MROUTE_H_ */
  275 
  276 #define MF6CTBLSIZ      256
  277 #if (MF6CTBLSIZ & (MF6CTBLSIZ - 1)) == 0          /* from sys:route.h */
  278 #define MF6CHASHMOD(h)  ((h) & (MF6CTBLSIZ - 1))
  279 #else
  280 #define MF6CHASHMOD(h)  ((h) % MF6CTBLSIZ)
  281 #endif
  282 
  283 #define MAX_UPQ6        4               /* max. no of pkts in upcall Q */
  284 
  285 struct sockopt;
  286 struct socket;
  287 
  288 int     ip6_mrouter_set (struct socket *so, struct sockopt *sopt);
  289 int     ip6_mrouter_get (struct socket *so, struct sockopt *sopt);
  290 int     ip6_mrouter_done (void);
  291 int     mrt6_ioctl (int, caddr_t);
  292 #endif /* _KERNEL */
  293 
  294 #endif /* !_NETINET6_IP6_MROUTE_H_ */

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