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 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 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 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