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_init = sctp_init, 95 .pr_drain = sctp_drain, 96 .pr_usrreqs = &sctp6_usrreqs, 97 }; 98 99 struct protosw sctp6_seqpacket_protosw = { 100 .pr_type = SOCK_SEQPACKET, 101 .pr_domain = &inet6domain, 102 .pr_protocol = IPPROTO_SCTP, 103 .pr_flags = PR_WANTRCVD|PR_LASTHDR, 104 .pr_input = sctp6_input, 105 .pr_ctlinput = sctp6_ctlinput, 106 .pr_ctloutput = sctp_ctloutput, 107 #ifndef INET /* Do not call initialization and drain routines twice. */ 108 .pr_init = sctp_init, 109 .pr_drain = sctp_drain, 110 #endif 111 .pr_usrreqs = &sctp6_usrreqs, 112 }; 113 #endif 114 115 static int 116 sctp_module_load(void) 117 { 118 int error; 119 120 #ifdef INET 121 error = pf_proto_register(PF_INET, &sctp_stream_protosw); 122 if (error != 0) 123 return (error); 124 error = pf_proto_register(PF_INET, &sctp_seqpacket_protosw); 125 if (error != 0) 126 return (error); 127 error = ipproto_register(IPPROTO_SCTP); 128 if (error != 0) 129 return (error); 130 #endif 131 #ifdef INET6 132 error = pf_proto_register(PF_INET6, &sctp6_stream_protosw); 133 if (error != 0) 134 return (error); 135 error = pf_proto_register(PF_INET6, &sctp6_seqpacket_protosw); 136 if (error != 0) 137 return (error); 138 error = ip6proto_register(IPPROTO_SCTP); 139 if (error != 0) 140 return (error); 141 #endif 142 error = sctp_syscalls_init(); 143 if (error != 0) 144 return (error); 145 return (0); 146 } 147 148 static int __unused 149 sctp_module_unload(void) 150 { 151 152 (void)sctp_syscalls_uninit(); 153 154 #ifdef INET 155 (void)ipproto_unregister(IPPROTO_SCTP); 156 (void)pf_proto_unregister(PF_INET, IPPROTO_SCTP, SOCK_STREAM); 157 (void)pf_proto_unregister(PF_INET, IPPROTO_SCTP, SOCK_SEQPACKET); 158 #endif 159 #ifdef INET6 160 (void)ip6proto_unregister(IPPROTO_SCTP); 161 (void)pf_proto_unregister(PF_INET6, IPPROTO_SCTP, SOCK_STREAM); 162 (void)pf_proto_unregister(PF_INET6, IPPROTO_SCTP, SOCK_SEQPACKET); 163 #endif 164 return (0); 165 } 166 167 static int 168 sctp_modload(struct module *module, int cmd, void *arg) 169 { 170 int error; 171 172 switch (cmd) { 173 case MOD_LOAD: 174 error = sctp_module_load(); 175 break; 176 case MOD_UNLOAD: 177 /* 178 * Unloading SCTP is currently unsupported. Currently, SCTP 179 * iterator threads are not stopped during unload. 180 */ 181 error = EOPNOTSUPP; 182 break; 183 default: 184 error = 0; 185 break; 186 } 187 return (error); 188 } 189 190 static moduledata_t sctp_mod = { 191 "sctp", 192 &sctp_modload, 193 NULL, 194 }; 195 196 DECLARE_MODULE(sctp, sctp_mod, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY); 197 MODULE_VERSION(sctp, 1); 198