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/* $NetBSD: ip_encap.h,v 1.28 2022/12/07 08:33:02 knakahara Exp $ */
/* $KAME: ip_encap.h,v 1.7 2000/03/25 07:23:37 sumikawa Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _NETINET_IP_ENCAP_H_
#define _NETINET_IP_ENCAP_H_
#ifdef _KERNEL
#include <sys/pslist.h>
#include <sys/psref.h>
struct encapsw {
union {
struct encapsw4 {
void (*pr_input) /* input to protocol (from below) */
(struct mbuf *, int, int, void *);
void *(*pr_ctlinput) /* control input (from below) */
(int, const struct sockaddr *, void *, void *);
} _encapsw4;
struct encapsw6 {
int (*pr_input) /* input to protocol (from below) */
(struct mbuf **, int *, int, void *);
void *(*pr_ctlinput) /* control input (from below) */
(int, const struct sockaddr *, void *, void *);
} _encapsw6;
} encapsw46;
};
#define encapsw4 encapsw46._encapsw4
#define encapsw6 encapsw46._encapsw6
typedef int encap_priofunc_t(struct mbuf *, int, int, void *);
struct encap_key {
union {
struct sockaddr local_u_sa;
struct sockaddr_in local_u_sin;
struct sockaddr_in6 local_u_sin6;
} local_u;
#define local_sa local_u.local_u_sa
#define local_sin local_u.local_u_sin
#define local_sin6 local_u.local_u_sin6
union {
struct sockaddr remote_u_sa;
struct sockaddr_in remote_u_sin;
struct sockaddr_in6 remote_u_sin6;
} remote_u;
#define remote_sa remote_u.remote_u_sa
#define remote_sin remote_u.remote_u_sin
#define remote_sin6 remote_u.remote_u_sin6
u_int seq;
};
struct encaptab {
struct pslist_entry chain;
int af;
int proto; /* -1: don't care, I'll check myself */
struct sockaddr *addrpack; /* malloc'ed, for lookup */
struct sockaddr *src; /* my addr */
struct sockaddr *dst; /* remote addr */
encap_priofunc_t *func;
const struct encapsw *esw;
void *arg;
struct encap_key key;
u_int flag;
struct psref_target psref;
};
#define IP_ENCAP_ADDR_ENABLE __BIT(0)
/* to lookup a pair of address using map */
struct sockaddr_pack {
u_int8_t sp_len;
u_int8_t sp_family; /* not really used */
/* followed by variable-length data */
};
struct ip_pack4 {
struct sockaddr_pack p;
struct sockaddr_in mine;
struct sockaddr_in yours;
};
struct ip_pack6 {
struct sockaddr_pack p;
struct sockaddr_in6 mine;
struct sockaddr_in6 yours;
};
void encapinit(void);
void encap_init(void);
void encap4_input(struct mbuf *, int, int);
int encap6_input(struct mbuf **, int *, int);
const struct encaptab *encap_attach_func(int, int,
encap_priofunc_t *,
const struct encapsw *, void *);
const struct encaptab *encap_attach_addr(int, int,
const struct sockaddr *, const struct sockaddr *,
encap_priofunc_t *, const struct encapsw *, void *);
void *encap6_ctlinput(int, const struct sockaddr *, void *);
int encap_detach(const struct encaptab *);
int encap_lock_enter(void);
void encap_lock_exit(void);
bool encap_lock_held(void);
#define ENCAP_PR_WRAP_CTLINPUT(name) \
static void * \
name##_wrapper(int a, const struct sockaddr *b, void *c, void *d) \
{ \
void *rv; \
KERNEL_LOCK(1, NULL); \
rv = name(a, b, c, d); \
KERNEL_UNLOCK_ONE(NULL); \
return rv; \
}
#endif
#endif /* !_NETINET_IP_ENCAP_H_ */
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