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
56 static 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
69 static const struct ipsec_support ipv4_ipsec = {
70 .enabled = IPSEC_MODULE_ENABLED,
71 .methods = &ipv4_methods
72 };
73 const struct ipsec_support * const ipv4_ipsec_support = &ipv4_ipsec;
74 #endif /* !KLD_MODULE */
75 #endif /* INET */
76
77 #ifdef INET6
78 static 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
91 static const struct ipsec_support ipv6_ipsec = {
92 .enabled = IPSEC_MODULE_ENABLED,
93 .methods = &ipv6_methods
94 };
95 const 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 */
104 static int
ipsec_modevent(module_t mod,int type,void * data)105 ipsec_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
139 static moduledata_t ipsec_mod = {
140 "ipsec",
141 ipsec_modevent,
142 0
143 };
144
145 DECLARE_MODULE(ipsec, ipsec_mod, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY);
146 MODULE_VERSION(ipsec, 1);
147 #ifdef KLD_MODULE
148 MODULE_DEPEND(ipsec, ipsec_support, 1, 1, 1);
149 #endif
150