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ip_encap.h revision 1.16 
      1 /*	$NetBSD: ip_encap.h,v 1.16 2016/01/26 05:58:05 knakahara 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 	union {
     44 		struct encapsw4 {
     45 			void	(*pr_input)	/* input to protocol (from below) */
     46 				(struct mbuf *, ...);
     47 			void    *(*pr_ctlinput)	/* control input (from below) */
     48 				(int, const struct sockaddr *, void *);
     49 		} _encapsw4;
     50 		struct encapsw6 {
     51 			int	(*pr_input)	/* input to protocol (from below) */
     52 				(struct mbuf **, int *, int);
     53 			void	*(*pr_ctlinput)	/* control input (from below) */
     54 				(int, const struct sockaddr *, void *);
     55 		} _encapsw6;
     56 	} encapsw46;
     57 };
     58 
     59 #define encapsw4 encapsw46._encapsw4
     60 #define encapsw6 encapsw46._encapsw6
     61 
     62 struct encaptab {
     63 	struct radix_node nodes[2];
     64 	LIST_ENTRY(encaptab) chain;
     65 	int af;
     66 	int proto;			/* -1: don't care, I'll check myself */
     67 	struct sockaddr *addrpack;	/* malloc'ed, for radix lookup */
     68 	struct sockaddr *maskpack;	/* ditto */
     69 	struct sockaddr *src;		/* my addr */
     70 	struct sockaddr *srcmask;
     71 	struct sockaddr *dst;		/* remote addr */
     72 	struct sockaddr *dstmask;
     73 	int (*func) (struct mbuf *, int, int, void *);
     74 	const struct encapsw *esw;
     75 	void *arg;			/* passed via PACKET_TAG_ENCAP */
     76 };
     77 
     78 /* to lookup a pair of address using radix tree */
     79 struct sockaddr_pack {
     80 	u_int8_t sp_len;
     81 	u_int8_t sp_family;	/* not really used */
     82 	/* followed by variable-length data */
     83 };
     84 
     85 struct ip_pack4 {
     86 	struct sockaddr_pack p;
     87 	struct sockaddr_in mine;
     88 	struct sockaddr_in yours;
     89 };
     90 struct ip_pack6 {
     91 	struct sockaddr_pack p;
     92 	struct sockaddr_in6 mine;
     93 	struct sockaddr_in6 yours;
     94 };
     95 
     96 void	encap_init(void);
     97 void	encap4_input(struct mbuf *, ...);
     98 int	encap6_input(struct mbuf **, int *, int);
     99 const struct encaptab *encap_attach(int, int, const struct sockaddr *,
    100 	const struct sockaddr *, const struct sockaddr *,
    101 	const struct sockaddr *, const struct encapsw *, void *);
    102 const struct encaptab *encap_attach_func(int, int,
    103 	int (*)(struct mbuf *, int, int, void *),
    104 	const struct encapsw *, void *);
    105 void	*encap6_ctlinput(int, const struct sockaddr *, void *);
    106 int	encap_detach(const struct encaptab *);
    107 void	*encap_getarg(struct mbuf *);
    108 #endif
    109 
    110 #endif /* !_NETINET_IP_ENCAP_H_ */
    111