1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2019-2020 The FreeBSD Foundation
5 *
6 * This software was developed by Mark Johnston under sponsorship from
7 * the FreeBSD Foundation.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are
11 * met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include <sys/cdefs.h>
32 #include "opt_inet.h"
33 #include "opt_inet6.h"
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/module.h>
39 #include <sys/protosw.h>
40 #include <sys/socket.h>
41
42 #include <netinet/in.h>
43 #include <netinet/ip.h>
44 #include <netinet/ip_var.h>
45 #include <netinet/sctp.h>
46 #include <netinet/sctp_pcb.h>
47 #include <netinet/sctp_var.h>
48 #include <netinet/sctp_os_bsd.h>
49
50 #include <netinet6/ip6_var.h>
51 #include <netinet6/sctp6_var.h>
52
53 static int
sctp_module_load(void)54 sctp_module_load(void)
55 {
56 int error;
57
58 #ifdef INET
59 error = protosw_register(&inetdomain, &sctp_stream_protosw);
60 if (error != 0)
61 return (error);
62 error = protosw_register(&inetdomain, &sctp_seqpacket_protosw);
63 if (error != 0)
64 return (error);
65 error = ipproto_register(IPPROTO_SCTP, sctp_input, sctp_ctlinput);
66 if (error != 0)
67 return (error);
68 #endif
69 #ifdef INET6
70 error = protosw_register(&inet6domain, &sctp6_stream_protosw);
71 if (error != 0)
72 return (error);
73 error = protosw_register(&inet6domain, &sctp6_seqpacket_protosw);
74 if (error != 0)
75 return (error);
76 error = ip6proto_register(IPPROTO_SCTP, sctp6_input, sctp6_ctlinput);
77 if (error != 0)
78 return (error);
79 #endif
80 error = sctp_syscalls_init();
81 if (error != 0)
82 return (error);
83 return (0);
84 }
85
86 static int __unused
sctp_module_unload(void)87 sctp_module_unload(void)
88 {
89
90 (void)sctp_syscalls_uninit();
91
92 #ifdef INET
93 (void)ipproto_unregister(IPPROTO_SCTP);
94 (void)protosw_unregister(&sctp_seqpacket_protosw);
95 (void)protosw_unregister(&sctp_stream_protosw);
96 #endif
97 #ifdef INET6
98 (void)ip6proto_unregister(IPPROTO_SCTP);
99 (void)protosw_unregister(&sctp6_seqpacket_protosw);
100 (void)protosw_unregister(&sctp6_stream_protosw);
101 #endif
102 return (0);
103 }
104
105 static int
sctp_modload(struct module * module,int cmd,void * arg)106 sctp_modload(struct module *module, int cmd, void *arg)
107 {
108 int error;
109
110 switch (cmd) {
111 case MOD_LOAD:
112 error = sctp_module_load();
113 break;
114 case MOD_UNLOAD:
115 /*
116 * Unloading SCTP is currently unsupported. Currently, SCTP
117 * iterator threads are not stopped during unload.
118 */
119 error = EOPNOTSUPP;
120 break;
121 default:
122 error = 0;
123 break;
124 }
125 return (error);
126 }
127
128 static moduledata_t sctp_mod = {
129 "sctp",
130 &sctp_modload,
131 NULL,
132 };
133
134 DECLARE_MODULE(sctp, sctp_mod, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY);
135 MODULE_VERSION(sctp, 1);
136