sys/netinet/ip_encap.h

   1 /*      $NetBSD: ip_encap.h,v 1.12 2008/04/24 11:38:37 ad Exp $ */
   2 /*      $KAME: ip_encap.h,v 1.7 2000/03/25 07:23:37 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 #ifndef _NETINET_IP_ENCAP_H_
  34 #define _NETINET_IP_ENCAP_H_
  35
  36 #ifdef _KERNEL
  37
  38 #ifndef RNF_NORMAL
  39 #include <net/radix.h>
  40 #endif
  41
  42 struct encaptab {
  43         struct radix_node nodes[2];
  44         LIST_ENTRY(encaptab) chain;
  45         int af;
  46         int proto;                      /* -1: don't care, I'll check myself */
  47         struct sockaddr *addrpack;      /* malloc'ed, for radix lookup */
  48         struct sockaddr *maskpack;      /* ditto */
  49         struct sockaddr *src;           /* my addr */
  50         struct sockaddr *srcmask;
  51         struct sockaddr *dst;           /* remote addr */
  52         struct sockaddr *dstmask;
  53         int (*func) (struct mbuf *, int, int, void *);
  54         const struct protosw *psw;      /* only pr_input will be used */
  55         void *arg;                      /* passed via PACKET_TAG_ENCAP */
  56 };
  57
  58 /* to lookup a pair of address using radix tree */
  59 struct sockaddr_pack {
  60         u_int8_t sp_len;
  61         u_int8_t sp_family;     /* not really used */
  62         /* followed by variable-length data */
  63 };
  64
  65 struct ip_pack4 {
  66         struct sockaddr_pack p;
  67         struct sockaddr_in mine;
  68         struct sockaddr_in yours;
  69 };
  70 struct ip_pack6 {
  71         struct sockaddr_pack p;
  72         struct sockaddr_in6 mine;
  73         struct sockaddr_in6 yours;
  74 };
  75
  76 void    encap_init(void);
  77 void    encap4_input(struct mbuf *, ...);
  78 int     encap6_input(struct mbuf **, int *, int);
  79 const struct encaptab *encap_attach(int, int, const struct sockaddr *,
  80         const struct sockaddr *, const struct sockaddr *,
  81         const struct sockaddr *, const struct protosw *, void *);
  82 const struct encaptab *encap_attach_func(int, int,
  83         int (*)(struct mbuf *, int, int, void *),
  84         const struct protosw *, void *);
  85 void    *encap6_ctlinput(int, const struct sockaddr *, void *);
  86 int     encap_detach(const struct encaptab *);
  87 void    *encap_getarg(struct mbuf *);
  88 #endif
  89
  90 #endif /* !_NETINET_IP_ENCAP_H_ */