1/* $NetBSD: ip_encap.h,v 1.22 2016/07/04 04:35:09 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#include <sys/pslist.h>
43#include <sys/psref.h>
44
45struct encapsw {
46 union {
47 struct encapsw4 {
48 void (*pr_input) /* input to protocol (from below) */
49 (struct mbuf *, int, int);
50 void *(*pr_ctlinput) /* control input (from below) */
51 (int, const struct sockaddr *, void *, void *);
52 } _encapsw4;
53 struct encapsw6 {
54 int (*pr_input) /* input to protocol (from below) */
55 (struct mbuf **, int *, int);
56 void *(*pr_ctlinput) /* control input (from below) */
57 (int, const struct sockaddr *, void *, void *);
58 } _encapsw6;
59 } encapsw46;
60};
61
62#define encapsw4 encapsw46._encapsw4
63#define encapsw6 encapsw46._encapsw6
64
65struct encaptab {
66 struct radix_node nodes[2];
67 struct pslist_entry chain;
68 int af;
69 int proto; /* -1: don't care, I'll check myself */
70 struct sockaddr *addrpack; /* malloc'ed, for radix lookup */
71 struct sockaddr *maskpack; /* ditto */
72 struct sockaddr *src; /* my addr */
73 struct sockaddr *srcmask;
74 struct sockaddr *dst; /* remote addr */
75 struct sockaddr *dstmask;
76 int (*func) (struct mbuf *, int, int, void *);
77 const struct encapsw *esw;
78 void *arg; /* passed via PACKET_TAG_ENCAP */
79 struct psref_target psref;
80};
81
82/* to lookup a pair of address using radix tree */
83struct sockaddr_pack {
84 u_int8_t sp_len;
85 u_int8_t sp_family; /* not really used */
86 /* followed by variable-length data */
87};
88
89struct ip_pack4 {
90 struct sockaddr_pack p;
91 struct sockaddr_in mine;
92 struct sockaddr_in yours;
93};
94struct ip_pack6 {
95 struct sockaddr_pack p;
96 struct sockaddr_in6 mine;
97 struct sockaddr_in6 yours;
98};
99
100void encapinit(void);
101
102void encap_init(void);
103void encap4_input(struct mbuf *, ...);
104int encap6_input(struct mbuf **, int *, int);
105const struct encaptab *encap_attach(int, int, const struct sockaddr *,
106 const struct sockaddr *, const struct sockaddr *,
107 const struct sockaddr *, const struct encapsw *, void *);
108const struct encaptab *encap_attach_func(int, int,
109 int (*)(struct mbuf *, int, int, void *),
110 const struct encapsw *, void *);
111void *encap6_ctlinput(int, const struct sockaddr *, void *);
112int encap_detach(const struct encaptab *);
113void *encap_getarg(struct mbuf *);
114
115int encap_lock_enter(void);
116void encap_lock_exit(void);
117bool encap_lock_held(void);
118
119#define ENCAP_PR_WRAP_CTLINPUT(name) \
120static void * \
121name##_wrapper(int a, const struct sockaddr *b, void *c, void *d) \
122{ \
123 void *rv; \
124 KERNEL_LOCK(1, NULL); \
125 rv = name(a, b, c, d); \
126 KERNEL_UNLOCK_ONE(NULL); \
127 return rv; \
128}
129#endif
130
131#endif /* !_NETINET_IP_ENCAP_H_ */
132