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ip_encap.h revision 1.14 
      1 /*	$NetBSD: ip_encap.h,v 1.14 2016/01/22 05:15:10 riastradh 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 encapsw {
     43 	void (*en_input)(struct mbuf *, ...);
     44 	void *(*en_ctlinput)(int, const struct sockaddr *, void *);
     45 };
     46 
     47 struct encaptab {
     48 	struct radix_node nodes[2];
     49 	LIST_ENTRY(encaptab) chain;
     50 	int af;
     51 	int proto;			/* -1: don't care, I'll check myself */
     52 	struct sockaddr *addrpack;	/* malloc'ed, for radix lookup */
     53 	struct sockaddr *maskpack;	/* ditto */
     54 	struct sockaddr *src;		/* my addr */
     55 	struct sockaddr *srcmask;
     56 	struct sockaddr *dst;		/* remote addr */
     57 	struct sockaddr *dstmask;
     58 	int (*func) (struct mbuf *, int, int, void *);
     59 	const struct encapsw *esw;
     60 	void *arg;			/* passed via PACKET_TAG_ENCAP */
     61 };
     62 
     63 /* to lookup a pair of address using radix tree */
     64 struct sockaddr_pack {
     65 	u_int8_t sp_len;
     66 	u_int8_t sp_family;	/* not really used */
     67 	/* followed by variable-length data */
     68 };
     69 
     70 struct ip_pack4 {
     71 	struct sockaddr_pack p;
     72 	struct sockaddr_in mine;
     73 	struct sockaddr_in yours;
     74 };
     75 struct ip_pack6 {
     76 	struct sockaddr_pack p;
     77 	struct sockaddr_in6 mine;
     78 	struct sockaddr_in6 yours;
     79 };
     80 
     81 void	encap_init(void);
     82 void	encap4_input(struct mbuf *, ...);
     83 int	encap6_input(struct mbuf **, int *, int);
     84 const struct encaptab *encap_attach(int, int, const struct sockaddr *,
     85 	const struct sockaddr *, const struct sockaddr *,
     86 	const struct sockaddr *, const struct encapsw *, void *);
     87 const struct encaptab *encap_attach_func(int, int,
     88 	int (*)(struct mbuf *, int, int, void *),
     89 	const struct encapsw *, void *);
     90 void	*encap6_ctlinput(int, const struct sockaddr *, void *);
     91 int	encap_detach(const struct encaptab *);
     92 void	*encap_getarg(struct mbuf *);
     93 #endif
     94 
     95 #endif /* !_NETINET_IP_ENCAP_H_ */
     96