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/net/if_gif.h

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    1 /*      $FreeBSD: releng/6.2/sys/net/if_gif.h 155104 2006-01-31 15:56:47Z glebius $     */
    2 /*      $KAME: if_gif.h,v 1.17 2000/09/11 11:36:41 sumikawa Exp $       */
    3 
    4 /*-
    5  * Copyright (C) 1995, 1996, 1997, and 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 /*
   34  * if_gif.h
   35  */
   36 
   37 #ifndef _NET_IF_GIF_H_
   38 #define _NET_IF_GIF_H_
   39 
   40 
   41 #ifdef _KERNEL
   42 #include "opt_inet.h"
   43 #include "opt_inet6.h"
   44 
   45 #include <netinet/in.h>
   46 /* xxx sigh, why route have struct route instead of pointer? */
   47 
   48 struct encaptab;
   49 
   50 extern  void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp,
   51                 int af);
   52 extern  void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m,
   53                 int af);
   54 extern  int  (*ng_gif_output_p)(struct ifnet *ifp, struct mbuf **mp);
   55 extern  void (*ng_gif_attach_p)(struct ifnet *ifp);
   56 extern  void (*ng_gif_detach_p)(struct ifnet *ifp);
   57 
   58 struct gif_softc {
   59         struct ifnet    *gif_ifp;
   60         struct mtx      gif_mtx;
   61         struct sockaddr *gif_psrc; /* Physical src addr */
   62         struct sockaddr *gif_pdst; /* Physical dst addr */
   63         union {
   64                 struct route  gifscr_ro;    /* xxx */
   65 #ifdef INET6
   66                 struct route_in6 gifscr_ro6; /* xxx */
   67 #endif
   68         } gifsc_gifscr;
   69         int             gif_flags;
   70         const struct encaptab *encap_cookie4;
   71         const struct encaptab *encap_cookie6;
   72         void            *gif_netgraph;  /* ng_gif(4) netgraph node info */
   73         LIST_ENTRY(gif_softc) gif_list; /* all gif's are linked */
   74 };
   75 #define GIF2IFP(sc)     ((sc)->gif_ifp)
   76 #define GIF_LOCK_INIT(sc)       mtx_init(&(sc)->gif_mtx, "gif softc",   \
   77                                      NULL, MTX_DEF)
   78 #define GIF_LOCK_DESTROY(sc)    mtx_destroy(&(sc)->gif_mtx)
   79 #define GIF_LOCK(sc)            mtx_lock(&(sc)->gif_mtx)
   80 #define GIF_UNLOCK(sc)          mtx_unlock(&(sc)->gif_mtx)
   81 #define GIF_LOCK_ASSERT(sc)     mtx_assert(&(sc)->gif_mtx, MA_OWNED)
   82 
   83 #define gif_ro gifsc_gifscr.gifscr_ro
   84 #ifdef INET6
   85 #define gif_ro6 gifsc_gifscr.gifscr_ro6
   86 #endif
   87 
   88 #define GIF_MTU         (1280)  /* Default MTU */
   89 #define GIF_MTU_MIN     (1280)  /* Minimum MTU */
   90 #define GIF_MTU_MAX     (8192)  /* Maximum MTU */
   91 
   92 #define MTAG_GIF        1080679712
   93 #define MTAG_GIF_CALLED 0
   94 
   95 struct etherip_header {
   96         u_int8_t eip_ver;       /* version/reserved */
   97         u_int8_t eip_pad;       /* required padding byte */
   98 };
   99 #define ETHERIP_VER_VERS_MASK   0x0f
  100 #define ETHERIP_VER_RSVD_MASK   0xf0
  101 #define ETHERIP_VERSION         0x03
  102 
  103 /* Prototypes */
  104 void gif_input(struct mbuf *, int, struct ifnet *);
  105 int gif_output(struct ifnet *, struct mbuf *, struct sockaddr *,
  106                struct rtentry *);
  107 int gif_ioctl(struct ifnet *, u_long, caddr_t);
  108 int gif_set_tunnel(struct ifnet *, struct sockaddr *, struct sockaddr *);
  109 void gif_delete_tunnel(struct ifnet *);
  110 int gif_encapcheck(const struct mbuf *, int, int, void *);
  111 
  112 #endif /* _KERNEL */
  113 
  114 #endif /* _NET_IF_GIF_H_ */

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