1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 __FBSDID("$FreeBSD$"); 33 34 #include "opt_inet.h" 35 #include "opt_inet6.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/module.h> 41 #include <sys/protosw.h> 42 #include <sys/socket.h> 43 44 #include <netinet/in.h> 45 #include <netinet/ip.h> 46 #include <netinet/ip_var.h> 47 #include <netinet/sctp.h> 48 #include <netinet/sctp_pcb.h> 49 #include <netinet/sctp_var.h> 50 #include <netinet/sctp_os_bsd.h> 51 52 #include <netinet6/ip6_var.h> 53 #include <netinet6/sctp6_var.h> 54 55 #ifdef INET 56 extern struct domain inetdomain; 57 58 struct protosw sctp_stream_protosw = { 59 .pr_type = SOCK_STREAM, 60 .pr_domain = &inetdomain, 61 .pr_protocol = IPPROTO_SCTP, 62 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR, 63 .pr_input = sctp_input, 64 .pr_ctlinput = sctp_ctlinput, 65 .pr_ctloutput = sctp_ctloutput, 66 .pr_drain = sctp_drain, 67 .pr_usrreqs = &sctp_usrreqs, 68 }; 69 70 struct protosw sctp_seqpacket_protosw = { 71 .pr_type = SOCK_SEQPACKET, 72 .pr_domain = &inetdomain, 73 .pr_protocol = IPPROTO_SCTP, 74 .pr_flags = PR_WANTRCVD|PR_LASTHDR, 75 .pr_input = sctp_input, 76 .pr_ctlinput = sctp_ctlinput, 77 .pr_ctloutput = sctp_ctloutput, 78 .pr_drain = sctp_drain, 79 .pr_usrreqs = &sctp_usrreqs, 80 }; 81 #endif 82 83 #ifdef INET6 84 extern struct domain inet6domain; 85 86 struct protosw sctp6_stream_protosw = { 87 .pr_type = SOCK_STREAM, 88 .pr_domain = &inet6domain, 89 .pr_protocol = IPPROTO_SCTP, 90 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR, 91 .pr_input = sctp6_input, 92 .pr_ctlinput = sctp6_ctlinput, 93 .pr_ctloutput = sctp_ctloutput, 94 .pr_drain = sctp_drain, 95 .pr_usrreqs = &sctp6_usrreqs, 96 }; 97 98 struct protosw sctp6_seqpacket_protosw = { 99 .pr_type = SOCK_SEQPACKET, 100 .pr_domain = &inet6domain, 101 .pr_protocol = IPPROTO_SCTP, 102 .pr_flags = PR_WANTRCVD|PR_LASTHDR, 103 .pr_input = sctp6_input, 104 .pr_ctlinput = sctp6_ctlinput, 105 .pr_ctloutput = sctp_ctloutput, 106 #ifndef INET /* Do not call initialization and drain routines twice. */ 107 .pr_drain = sctp_drain, 108 #endif 109 .pr_usrreqs = &sctp6_usrreqs, 110 }; 111 #endif 112 113 static int 114 sctp_module_load(void) 115 { 116 int error; 117 118 #ifdef INET 119 error = pf_proto_register(PF_INET, &sctp_stream_protosw); 120 if (error != 0) 121 return (error); 122 error = pf_proto_register(PF_INET, &sctp_seqpacket_protosw); 123 if (error != 0) 124 return (error); 125 error = ipproto_register(IPPROTO_SCTP); 126 if (error != 0) 127 return (error); 128 #endif 129 #ifdef INET6 130 error = pf_proto_register(PF_INET6, &sctp6_stream_protosw); 131 if (error != 0) 132 return (error); 133 error = pf_proto_register(PF_INET6, &sctp6_seqpacket_protosw); 134 if (error != 0) 135 return (error); 136 error = ip6proto_register(IPPROTO_SCTP); 137 if (error != 0) 138 return (error); 139 #endif 140 error = sctp_syscalls_init(); 141 if (error != 0) 142 return (error); 143 return (0); 144 } 145 146 static int __unused 147 sctp_module_unload(void) 148 { 149 150 (void)sctp_syscalls_uninit(); 151 152 #ifdef INET 153 (void)ipproto_unregister(IPPROTO_SCTP); 154 (void)pf_proto_unregister(PF_INET, IPPROTO_SCTP, SOCK_STREAM); 155 (void)pf_proto_unregister(PF_INET, IPPROTO_SCTP, SOCK_SEQPACKET); 156 #endif 157 #ifdef INET6 158 (void)ip6proto_unregister(IPPROTO_SCTP); 159 (void)pf_proto_unregister(PF_INET6, IPPROTO_SCTP, SOCK_STREAM); 160 (void)pf_proto_unregister(PF_INET6, IPPROTO_SCTP, SOCK_SEQPACKET); 161 #endif 162 return (0); 163 } 164 165 static int 166 sctp_modload(struct module *module, int cmd, void *arg) 167 { 168 int error; 169 170 switch (cmd) { 171 case MOD_LOAD: 172 error = sctp_module_load(); 173 break; 174 case MOD_UNLOAD: 175 /* 176 * Unloading SCTP is currently unsupported. Currently, SCTP 177 * iterator threads are not stopped during unload. 178 */ 179 error = EOPNOTSUPP; 180 break; 181 default: 182 error = 0; 183 break; 184 } 185 return (error); 186 } 187 188 static moduledata_t sctp_mod = { 189 "sctp", 190 &sctp_modload, 191 NULL, 192 }; 193 194 DECLARE_MODULE(sctp, sctp_mod, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY); 195 MODULE_VERSION(sctp, 1); 196