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
53static int
54sctp_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
86static int __unused
87sctp_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
105static int
106sctp_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
128static moduledata_t sctp_mod = {
129	"sctp",
130	&sctp_modload,
131	NULL,
132};
133
134DECLARE_MODULE(sctp, sctp_mod, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY);
135MODULE_VERSION(sctp, 1);
136