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/param.h>
32#include <sys/systm.h>
33#include <sys/kernel.h>
34#include <sys/lock.h>
35#include <sys/malloc.h>
36#include <sys/mbuf.h>
37#include <sys/module.h>
38#include <sys/priv.h>
39#include <sys/rmlock.h>
40#include <sys/socket.h>
41#include <sys/sockopt.h>
42#include <sys/syslog.h>
43#include <sys/proc.h>
44
45#include <netinet/in.h>
46#include <netinet/in_pcb.h>
47
48#include <netipsec/ipsec.h>
49#include <netipsec/ipsec6.h>
50#include <netipsec/key.h>
51#include <netipsec/key_debug.h>
52
53#include <netipsec/ipsec_support.h>
54
55#ifdef INET
56static const struct ipsec_methods ipv4_methods = {
57	.input = ipsec4_input,
58	.forward = ipsec4_forward,
59	.output = ipsec4_output,
60	.pcbctl = ipsec4_pcbctl,
61	.capability = ipsec4_capability,
62	.check_policy = ipsec4_in_reject,
63	.ctlinput = ipsec4_ctlinput,
64	.hdrsize = ipsec_hdrsiz_inpcb,
65	.udp_input = udp_ipsec_input,
66	.udp_pcbctl = udp_ipsec_pcbctl,
67};
68#ifndef KLD_MODULE
69static const struct ipsec_support ipv4_ipsec = {
70	.enabled = IPSEC_MODULE_ENABLED,
71	.methods = &ipv4_methods
72};
73const struct ipsec_support * const ipv4_ipsec_support = &ipv4_ipsec;
74#endif /* !KLD_MODULE */
75#endif /* INET */
76
77#ifdef INET6
78static const struct ipsec_methods ipv6_methods = {
79	.input = ipsec6_input,
80	.forward = ipsec6_forward,
81	.output = ipsec6_output,
82	.pcbctl = ipsec6_pcbctl,
83	.capability = ipsec6_capability,
84	.check_policy = ipsec6_in_reject,
85	.ctlinput = ipsec6_ctlinput,
86	.hdrsize = ipsec_hdrsiz_inpcb,
87	.udp_input = udp_ipsec_input,
88	.udp_pcbctl = udp_ipsec_pcbctl,
89};
90#ifndef KLD_MODULE
91static const struct ipsec_support ipv6_ipsec = {
92	.enabled = IPSEC_MODULE_ENABLED,
93	.methods = &ipv6_methods
94};
95const struct ipsec_support * const ipv6_ipsec_support = &ipv6_ipsec;
96#endif /* !KLD_MODULE */
97#endif /* INET6 */
98
99/*
100 * Always register ipsec module.
101 * Even when IPsec is build in the kernel, we need to have
102 * module registered. This will prevent to load ipsec.ko.
103 */
104static int
105ipsec_modevent(module_t mod, int type, void *data)
106{
107
108	switch (type) {
109	case MOD_LOAD:
110		/* All xforms are registered via SYSINIT */
111		if (!ipsec_initialized())
112			return (ENOMEM);
113#ifdef KLD_MODULE
114#ifdef INET
115		ipsec_support_enable(ipv4_ipsec_support, &ipv4_methods);
116#endif
117#ifdef INET6
118		ipsec_support_enable(ipv6_ipsec_support, &ipv6_methods);
119#endif
120#endif /* KLD_MODULE */
121		break;
122	case MOD_UNLOAD:
123		/* All xforms are unregistered via SYSUNINIT */
124#ifdef KLD_MODULE
125#ifdef INET
126		ipsec_support_disable(ipv4_ipsec_support);
127#endif
128#ifdef INET6
129		ipsec_support_disable(ipv6_ipsec_support);
130#endif
131#endif /* KLD_MODULE */
132		break;
133	default:
134		return (EOPNOTSUPP);
135	}
136	return (0);
137}
138
139static moduledata_t ipsec_mod = {
140	"ipsec",
141	ipsec_modevent,
142	0
143};
144
145DECLARE_MODULE(ipsec, ipsec_mod, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY);
146MODULE_VERSION(ipsec, 1);
147#ifdef KLD_MODULE
148MODULE_DEPEND(ipsec, ipsec_support, 1, 1, 1);
149#endif
150