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 /*      $FreeBSD$       */
    2 /*      $KAME: if_gif.h,v 1.17 2000/09/11 11:36:41 sumikawa Exp $       */
    3 
    4 /*-
    5  * SPDX-License-Identifier: BSD-3-Clause
    6  *
    7  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    8  * Copyright (c) 2018 Andrey V. Elsukov <ae@FreeBSD.org>
    9  * All rights reserved.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. Neither the name of the project nor the names of its contributors
   20  *    may be used to endorse or promote products derived from this software
   21  *    without specific prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   33  * SUCH DAMAGE.
   34  */
   35 
   36 #ifndef _NET_IF_GIF_H_
   37 #define _NET_IF_GIF_H_
   38 
   39 #ifdef _KERNEL
   40 
   41 struct ip;
   42 struct ip6_hdr;
   43 
   44 extern  void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp,
   45                 int af);
   46 extern  void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m,
   47                 int af);
   48 extern  int  (*ng_gif_output_p)(struct ifnet *ifp, struct mbuf **mp);
   49 extern  void (*ng_gif_attach_p)(struct ifnet *ifp);
   50 extern  void (*ng_gif_detach_p)(struct ifnet *ifp);
   51 
   52 struct gif_softc {
   53         struct ifnet            *gif_ifp;
   54         int                     gif_family;
   55         int                     gif_flags;
   56         u_int                   gif_fibnum;
   57         u_int                   gif_options;
   58         void                    *gif_netgraph;  /* netgraph node info */
   59         union {
   60                 void            *hdr;
   61                 struct ip       *iphdr;
   62                 struct ip6_hdr  *ip6hdr;
   63         } gif_uhdr;
   64 
   65         CK_LIST_ENTRY(gif_softc) chain;
   66         CK_LIST_ENTRY(gif_softc) srchash;
   67 };
   68 CK_LIST_HEAD(gif_list, gif_softc);
   69 MALLOC_DECLARE(M_GIF);
   70 
   71 #ifndef GIF_HASH_SIZE
   72 #define GIF_HASH_SIZE   (1 << 4)
   73 #endif
   74 
   75 #define GIF2IFP(sc)     ((sc)->gif_ifp)
   76 #define gif_iphdr       gif_uhdr.iphdr
   77 #define gif_hdr         gif_uhdr.hdr
   78 #define gif_ip6hdr      gif_uhdr.ip6hdr
   79 
   80 #define GIF_MTU         (1280)  /* Default MTU */
   81 #define GIF_MTU_MIN     (1280)  /* Minimum MTU */
   82 #define GIF_MTU_MAX     (8192)  /* Maximum MTU */
   83 
   84 struct etherip_header {
   85 #if BYTE_ORDER == LITTLE_ENDIAN
   86         u_int   eip_resvl:4,    /* reserved */
   87                 eip_ver:4;      /* version */
   88 #endif
   89 #if BYTE_ORDER == BIG_ENDIAN
   90         u_int   eip_ver:4,      /* version */
   91                 eip_resvl:4;    /* reserved */
   92 #endif
   93         u_int8_t eip_resvh;     /* reserved */
   94 } __packed;
   95 
   96 #define ETHERIP_VERSION                 0x3
   97 /* mbuf adjust factor to force 32-bit alignment of IP header */
   98 #define ETHERIP_ALIGN           2
   99 
  100 #define GIF_RLOCK()     struct epoch_tracker gif_et; epoch_enter_preempt(net_epoch_preempt, &gif_et)
  101 #define GIF_RUNLOCK()   epoch_exit_preempt(net_epoch_preempt, &gif_et)
  102 #define GIF_WAIT()      epoch_wait_preempt(net_epoch_preempt)
  103 
  104 /* Prototypes */
  105 struct gif_list *gif_hashinit(void);
  106 void gif_hashdestroy(struct gif_list *);
  107 
  108 void gif_input(struct mbuf *, struct ifnet *, int, uint8_t);
  109 int gif_output(struct ifnet *, struct mbuf *, const struct sockaddr *,
  110                struct route *);
  111 
  112 void in_gif_init(void);
  113 void in_gif_uninit(void);
  114 int in_gif_output(struct ifnet *, struct mbuf *, int, uint8_t);
  115 int in_gif_ioctl(struct gif_softc *, u_long, caddr_t);
  116 int in_gif_setopts(struct gif_softc *, u_int);
  117 
  118 void in6_gif_init(void);
  119 void in6_gif_uninit(void);
  120 int in6_gif_output(struct ifnet *, struct mbuf *, int, uint8_t);
  121 int in6_gif_ioctl(struct gif_softc *, u_long, caddr_t);
  122 int in6_gif_setopts(struct gif_softc *, u_int);
  123 #endif /* _KERNEL */
  124 
  125 #define GIFGOPTS        _IOWR('i', 150, struct ifreq)
  126 #define GIFSOPTS        _IOW('i', 151, struct ifreq)
  127 
  128 #define GIF_IGNORE_SOURCE       0x0002
  129 #define GIF_OPTMASK             (GIF_IGNORE_SOURCE)
  130 
  131 #endif /* _NET_IF_GIF_H_ */

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