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 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (C) 1998 WIDE Project.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the project nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      $KAME: ip6_mroute.h,v 1.19 2001/06/14 06:12:55 suz Exp $
   32  * $FreeBSD$
   33  */
   34 
   35 /*      BSDI ip_mroute.h,v 2.5 1996/10/11 16:01:48 pjd Exp      */
   36 
   37 /*
   38  * Definitions for IP multicast forwarding.
   39  *
   40  * Written by David Waitzman, BBN Labs, August 1988.
   41  * Modified by Steve Deering, Stanford, February 1989.
   42  * Modified by Ajit Thyagarajan, PARC, August 1993.
   43  * Modified by Ajit Thyagarajan, PARC, August 1994.
   44  * Modified by Ahmed Helmy, USC, September 1996.
   45  *
   46  * MROUTING Revision: 1.2
   47  */
   48 
   49 #ifndef _NETINET6_IP6_MROUTE_H_
   50 #define _NETINET6_IP6_MROUTE_H_
   51 
   52 /*
   53  * Multicast Routing set/getsockopt commands.
   54  */
   55 #ifdef _KERNEL
   56 #define MRT6_OINIT              100     /* initialize forwarder (omrt6msg) */
   57 #endif
   58 #define MRT6_DONE               101     /* shut down forwarder */
   59 #define MRT6_ADD_MIF            102     /* add multicast interface */
   60 #define MRT6_DEL_MIF            103     /* delete multicast interface */
   61 #define MRT6_ADD_MFC            104     /* insert forwarding cache entry */
   62 #define MRT6_DEL_MFC            105     /* delete forwarding cache entry */
   63 #define MRT6_PIM                107     /* enable pim code */
   64 #define MRT6_INIT               108     /* initialize forwarder (mrt6msg) */
   65 
   66 #if BSD >= 199103
   67 #define GET_TIME(t)     microtime(&t)
   68 #elif defined(sun)
   69 #define GET_TIME(t)     uniqtime(&t)
   70 #else
   71 #define GET_TIME(t)     ((t) = time)
   72 #endif
   73 
   74 /*
   75  * Types and macros for handling bitmaps with one bit per multicast interface.
   76  */
   77 typedef u_short mifi_t;         /* type of a mif index */
   78 #define MAXMIFS         64
   79 
   80 #ifndef IF_SETSIZE
   81 #define IF_SETSIZE      256
   82 #endif
   83 
   84 typedef u_int32_t       if_mask;
   85 #define NIFBITS (sizeof(if_mask) * NBBY)        /* bits per mask */
   86 
   87 #ifndef howmany
   88 #define howmany(x, y)   (((x) + ((y) - 1)) / (y))
   89 #endif
   90 
   91 typedef struct if_set {
   92         if_mask ifs_bits[howmany(IF_SETSIZE, NIFBITS)];
   93 } if_set;
   94 
   95 #define IF_SET(n, p)    ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
   96 #define IF_CLR(n, p)    ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
   97 #define IF_ISSET(n, p)  ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
   98 #define IF_COPY(f, t)   bcopy(f, t, sizeof(*(f)))
   99 #define IF_ZERO(p)      bzero(p, sizeof(*(p)))
  100 
  101 /*
  102  * Argument structure for MRT6_ADD_IF.
  103  */
  104 struct mif6ctl {
  105         mifi_t      mif6c_mifi;         /* the index of the mif to be added  */
  106         u_char      mif6c_flags;        /* MIFF_ flags defined below         */
  107         u_short     mif6c_pifi;         /* the index of the physical IF */
  108 };
  109 
  110 #define MIFF_REGISTER   0x1     /* mif represents a register end-point */
  111 
  112 /*
  113  * Argument structure for MRT6_ADD_MFC and MRT6_DEL_MFC
  114  */
  115 struct mf6cctl {
  116         struct sockaddr_in6 mf6cc_origin;       /* IPv6 origin of mcasts */
  117         struct sockaddr_in6 mf6cc_mcastgrp; /* multicast group associated */
  118         mifi_t          mf6cc_parent;   /* incoming ifindex */
  119         struct if_set   mf6cc_ifset;    /* set of forwarding ifs */
  120 };
  121 
  122 /*
  123  * The kernel's multicast routing statistics.
  124  */
  125 struct mrt6stat {
  126         uint64_t mrt6s_mfc_lookups;     /* # forw. cache hash table hits   */
  127         uint64_t mrt6s_mfc_misses;      /* # forw. cache hash table misses */
  128         uint64_t mrt6s_upcalls;         /* # calls to multicast routing daemon */
  129         uint64_t mrt6s_no_route;        /* no route for packet's origin    */
  130         uint64_t mrt6s_bad_tunnel;      /* malformed tunnel options        */
  131         uint64_t mrt6s_cant_tunnel;     /* no room for tunnel options      */
  132         uint64_t mrt6s_wrong_if;        /* arrived on wrong interface      */
  133         uint64_t mrt6s_upq_ovflw;       /* upcall Q overflow               */
  134         uint64_t mrt6s_cache_cleanups;  /* # entries with no upcalls       */
  135         uint64_t mrt6s_drop_sel;        /* pkts dropped selectively        */
  136         uint64_t mrt6s_q_overflow;      /* pkts dropped - Q overflow       */
  137         uint64_t mrt6s_pkt2large;       /* pkts dropped - size > BKT SIZE  */
  138         uint64_t mrt6s_upq_sockfull;    /* upcalls dropped - socket full   */
  139 };
  140 
  141 #ifdef MRT6_OINIT
  142 /*
  143  * Struct used to communicate from kernel to multicast router
  144  * note the convenient similarity to an IPv6 header.
  145  * XXX old version, superseded by mrt6msg.
  146  */
  147 struct omrt6msg {
  148         u_long      unused1;
  149         u_char      im6_msgtype;                /* what type of message     */
  150         u_char      im6_mbz;                    /* must be zero             */
  151         u_char      im6_mif;                    /* mif rec'd on             */
  152         u_char      unused2;
  153         struct in6_addr  im6_src, im6_dst;
  154 };
  155 #endif
  156 
  157 /*
  158  * Structure used to communicate from kernel to multicast router.
  159  * We'll overlay the structure onto an MLD header (not an IPv6 header
  160  * like igmpmsg{} used for IPv4 implementation). This is because this
  161  * structure will be passed via an IPv6 raw socket, on which an application
  162  * will only receive the payload i.e. the data after the IPv6 header and all
  163  * the extension headers. (see Section 3 of RFC3542)
  164  */
  165 struct mrt6msg {
  166 #define MRT6MSG_NOCACHE         1
  167 #define MRT6MSG_WRONGMIF        2
  168 #define MRT6MSG_WHOLEPKT        3               /* used for user level encap*/
  169         u_char      im6_mbz;                    /* must be zero             */
  170         u_char      im6_msgtype;                /* what type of message     */
  171         u_int16_t   im6_mif;                    /* mif rec'd on             */
  172         u_int32_t   im6_pad;                    /* padding for 64bit arch   */
  173         struct in6_addr  im6_src, im6_dst;
  174 };
  175 
  176 /*
  177  * Argument structure used by multicast routing daemon to get src-grp
  178  * packet counts
  179  */
  180 struct sioc_sg_req6 {
  181         struct sockaddr_in6 src;
  182         struct sockaddr_in6 grp;
  183         u_quad_t pktcnt;
  184         u_quad_t bytecnt;
  185         u_quad_t wrong_if;
  186 };
  187 
  188 /*
  189  * Argument structure used by mrouted to get mif pkt counts
  190  */
  191 struct sioc_mif_req6 {
  192         mifi_t mifi;            /* mif number                           */
  193         u_quad_t icount;        /* Input packet count on mif            */
  194         u_quad_t ocount;        /* Output packet count on mif           */
  195         u_quad_t ibytes;        /* Input byte count on mif              */
  196         u_quad_t obytes;        /* Output byte count on mif             */
  197 };
  198 
  199 /*
  200  * Structure to export 'struct mif6' to userland via sysctl.
  201  */
  202 struct mif6_sctl {
  203         u_char          m6_flags;       /* MIFF_ flags defined above         */
  204         u_int           m6_rate_limit;  /* max rate                          */
  205         struct in6_addr m6_lcl_addr;    /* local interface address           */
  206         uint32_t        m6_ifp;         /* interface index                   */
  207         u_quad_t        m6_pkt_in;      /* # pkts in on interface            */
  208         u_quad_t        m6_pkt_out;     /* # pkts out on interface           */
  209         u_quad_t        m6_bytes_in;    /* # bytes in on interface           */
  210         u_quad_t        m6_bytes_out;   /* # bytes out on interface          */
  211 };
  212 
  213 #if defined(_KERNEL) || defined(KERNEL)
  214 /*
  215  * The kernel's multicast-interface structure.
  216  */
  217 struct mif6 {
  218         u_char          m6_flags;       /* MIFF_ flags defined above         */
  219         u_int           m6_rate_limit;  /* max rate                          */
  220         struct in6_addr m6_lcl_addr;    /* local interface address           */
  221         struct ifnet    *m6_ifp;        /* pointer to interface              */
  222         u_quad_t        m6_pkt_in;      /* # pkts in on interface            */
  223         u_quad_t        m6_pkt_out;     /* # pkts out on interface           */
  224         u_quad_t        m6_bytes_in;    /* # bytes in on interface           */
  225         u_quad_t        m6_bytes_out;   /* # bytes out on interface          */
  226 #ifdef notyet
  227         u_int           m6_rsvp_on;     /* RSVP listening on this vif */
  228         struct socket   *m6_rsvpd;      /* RSVP daemon socket */
  229 #endif
  230 };
  231 
  232 /*
  233  * The kernel's multicast forwarding cache entry structure
  234  */
  235 struct mf6c {
  236         struct sockaddr_in6  mf6c_origin;       /* IPv6 origin of mcasts     */
  237         struct sockaddr_in6  mf6c_mcastgrp;     /* multicast group associated*/
  238         mifi_t           mf6c_parent;           /* incoming IF               */
  239         struct if_set    mf6c_ifset;            /* set of outgoing IFs */
  240 
  241         u_quad_t        mf6c_pkt_cnt;           /* pkt count for src-grp     */
  242         u_quad_t        mf6c_byte_cnt;          /* byte count for src-grp    */
  243         u_quad_t        mf6c_wrong_if;          /* wrong if for src-grp      */
  244         int             mf6c_expire;            /* time to clean entry up    */
  245         struct timeval  mf6c_last_assert;       /* last time I sent an assert*/
  246         struct rtdetq  *mf6c_stall;             /* pkts waiting for route */
  247         struct mf6c    *mf6c_next;              /* hash table linkage */
  248 };
  249 
  250 #define MF6C_INCOMPLETE_PARENT ((mifi_t)-1)
  251 
  252 /*
  253  * Argument structure used for pkt info. while upcall is made
  254  */
  255 #ifndef _NETINET_IP_MROUTE_H_
  256 struct rtdetq {         /* XXX: rtdetq is also defined in ip_mroute.h */
  257     struct mbuf         *m;             /* A copy of the packet             */
  258     struct ifnet        *ifp;           /* Interface pkt came in on         */
  259 #ifdef UPCALL_TIMING
  260     struct timeval      t;              /* Timestamp */
  261 #endif /* UPCALL_TIMING */
  262     struct rtdetq       *next;
  263 };
  264 #endif /* _NETINET_IP_MROUTE_H_ */
  265 
  266 #define MF6CTBLSIZ      256
  267 #if (MF6CTBLSIZ & (MF6CTBLSIZ - 1)) == 0          /* from sys:route.h */
  268 #define MF6CHASHMOD(h)  ((h) & (MF6CTBLSIZ - 1))
  269 #else
  270 #define MF6CHASHMOD(h)  ((h) % MF6CTBLSIZ)
  271 #endif
  272 
  273 #define MAX_UPQ6        4               /* max. no of pkts in upcall Q */
  274 
  275 extern int      (*ip6_mrouter_set)(struct socket *so, struct sockopt *sopt);
  276 extern int      (*ip6_mrouter_get)(struct socket *so, struct sockopt *sopt);
  277 extern int      (*ip6_mrouter_done)(void);
  278 extern int      (*mrt6_ioctl)(u_long, caddr_t);
  279 #endif /* _KERNEL */
  280 
  281 #endif /* !_NETINET6_IP6_MROUTE_H_ */

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