ipsec_mod.c revision 315514 
1/*-
2 * Copyright (c) 2016 Andrey V. Elsukov <ae@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "opt_inet.h"
28#include "opt_inet6.h"
29#include "opt_ipsec.h"
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: stable/11/sys/netipsec/ipsec_mod.c 315514 2017-03-18 22:04:20Z ae $");
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/kernel.h>
37#include <sys/lock.h>
38#include <sys/malloc.h>
39#include <sys/mbuf.h>
40#include <sys/module.h>
41#include <sys/priv.h>
42#include <sys/rmlock.h>
43#include <sys/socket.h>
44#include <sys/sockopt.h>
45#include <sys/syslog.h>
46#include <sys/proc.h>
47
48#include <netinet/in.h>
49#include <netinet/in_pcb.h>
50
51#include <netipsec/ipsec.h>
52#include <netipsec/ipsec6.h>
53#include <netipsec/key.h>
54#include <netipsec/key_debug.h>
55
56#include <netipsec/ipsec_support.h>
57
58#ifdef INET
59static const struct ipsec_methods ipv4_methods = {
60	.input = ipsec4_input,
61	.forward = ipsec4_forward,
62	.output = ipsec4_output,
63	.pcbctl = ipsec4_pcbctl,
64	.capability = ipsec4_capability,
65	.check_policy = ipsec4_in_reject,
66	.hdrsize = ipsec_hdrsiz_inpcb,
67	.udp_input = udp_ipsec_input,
68	.udp_pcbctl = udp_ipsec_pcbctl,
69};
70#ifndef KLD_MODULE
71static const struct ipsec_support ipv4_ipsec = {
72	.enabled = IPSEC_MODULE_ENABLED,
73	.methods = &ipv4_methods
74};
75const struct ipsec_support * const ipv4_ipsec_support = &ipv4_ipsec;
76#endif /* !KLD_MODULE */
77#endif /* INET */
78
79#ifdef INET6
80static const struct ipsec_methods ipv6_methods = {
81	.input = ipsec6_input,
82	.forward = ipsec6_forward,
83	.output = ipsec6_output,
84	.pcbctl = ipsec6_pcbctl,
85	.capability = ipsec6_capability,
86	.check_policy = ipsec6_in_reject,
87	.hdrsize = ipsec_hdrsiz_inpcb,
88};
89#ifndef KLD_MODULE
90static const struct ipsec_support ipv6_ipsec = {
91	.enabled = IPSEC_MODULE_ENABLED,
92	.methods = &ipv6_methods
93};
94const struct ipsec_support * const ipv6_ipsec_support = &ipv6_ipsec;
95#endif /* !KLD_MODULE */
96#endif /* INET6 */
97
98/*
99 * Always register ipsec module.
100 * Even when IPsec is build in the kernel, we need to have
101 * module registered. This will prevent to load ipsec.ko.
102 */
103static int
104ipsec_modevent(module_t mod, int type, void *data)
105{
106
107	switch (type) {
108	case MOD_LOAD:
109		/* All xforms are registered via SYSINIT */
110		if (!ipsec_initialized())
111			return (ENOMEM);
112#ifdef KLD_MODULE
113#ifdef INET
114		ipsec_support_enable(ipv4_ipsec_support, &ipv4_methods);
115#endif
116#ifdef INET6
117		ipsec_support_enable(ipv6_ipsec_support, &ipv6_methods);
118#endif
119#endif /* KLD_MODULE */
120		break;
121	case MOD_UNLOAD:
122		/* All xforms are unregistered via SYSUNINIT */
123#ifdef KLD_MODULE
124#ifdef INET
125		ipsec_support_disable(ipv4_ipsec_support);
126#endif
127#ifdef INET6
128		ipsec_support_disable(ipv6_ipsec_support);
129#endif
130#endif /* KLD_MODULE */
131		break;
132	default:
133		return (EOPNOTSUPP);
134	}
135	return (0);
136}
137
138static moduledata_t ipsec_mod = {
139	"ipsec",
140	ipsec_modevent,
141	0
142};
143
144DECLARE_MODULE(ipsec, ipsec_mod, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY);
145MODULE_VERSION(ipsec, 1);
146#ifdef KLD_MODULE
147MODULE_DEPEND(ipsec, ipsec_support, 1, 1, 1);
148#endif
149