1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)in_proto.c 8.2 (Berkeley) 2/9/95 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include "opt_mrouting.h" 38 #include "opt_ipsec.h" 39 #include "opt_inet.h" 40 #include "opt_inet6.h" 41 #include "opt_sctp.h" 42 #include "opt_mpath.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/malloc.h> 48 #include <sys/socket.h> 49 #include <sys/domain.h> 50 #include <sys/proc.h> 51 #include <sys/protosw.h> 52 #include <sys/queue.h> 53 #include <sys/sysctl.h> 54 55 /* 56 * While this file provides the domain and protocol switch tables for IPv4, it 57 * also provides the sysctl node declarations for net.inet.* often shared with 58 * IPv6 for common features or by upper layer protocols. In case of no IPv4 59 * support compile out everything but these sysctl nodes. 60 */ 61 #ifdef INET 62 #include <net/if.h> 63 #include <net/if_var.h> 64 #include <net/route.h> 65 #ifdef RADIX_MPATH 66 #include <net/radix_mpath.h> 67 #endif 68 #include <net/vnet.h> 69 #endif /* INET */ 70 71 #if defined(INET) || defined(INET6) 72 #include <netinet/in.h> 73 #endif 74 75 #ifdef INET 76 #include <netinet/in_systm.h> 77 #include <netinet/in_var.h> 78 #include <netinet/ip.h> 79 #include <netinet/ip_var.h> 80 #include <netinet/ip_icmp.h> 81 #include <netinet/igmp_var.h> 82 #include <netinet/tcp.h> 83 #include <netinet/tcp_timer.h> 84 #include <netinet/tcp_var.h> 85 #include <netinet/udp.h> 86 #include <netinet/udp_var.h> 87 #include <netinet/ip_encap.h> 88 89 /* 90 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 91 */ 92 93 static struct pr_usrreqs nousrreqs; 94 95 #ifdef SCTP 96 #include <netinet/in_pcb.h> 97 #include <netinet/sctp_pcb.h> 98 #include <netinet/sctp.h> 99 #include <netinet/sctp_var.h> 100 #endif /* SCTP */ 101 102 FEATURE(inet, "Internet Protocol version 4"); 103 104 extern struct domain inetdomain; 105 106 /* Spacer for loadable protocols. */ 107 #define IPPROTOSPACER \ 108 { \ 109 .pr_domain = &inetdomain, \ 110 .pr_protocol = PROTO_SPACER, \ 111 .pr_usrreqs = &nousrreqs \ 112 } 113 114 struct protosw inetsw[] = { 115 { 116 .pr_type = 0, 117 .pr_domain = &inetdomain, 118 .pr_protocol = IPPROTO_IP, 119 .pr_init = ip_init, 120 .pr_slowtimo = ip_slowtimo, 121 .pr_drain = ip_drain, 122 .pr_usrreqs = &nousrreqs 123 }, 124 { 125 .pr_type = SOCK_DGRAM, 126 .pr_domain = &inetdomain, 127 .pr_protocol = IPPROTO_UDP, 128 .pr_flags = PR_ATOMIC|PR_ADDR, 129 .pr_input = udp_input, 130 .pr_ctlinput = udp_ctlinput, 131 .pr_ctloutput = udp_ctloutput, 132 .pr_init = udp_init, 133 .pr_usrreqs = &udp_usrreqs 134 }, 135 { 136 .pr_type = SOCK_STREAM, 137 .pr_domain = &inetdomain, 138 .pr_protocol = IPPROTO_TCP, 139 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 140 .pr_input = tcp_input, 141 .pr_ctlinput = tcp_ctlinput, 142 .pr_ctloutput = tcp_ctloutput, 143 .pr_init = tcp_init, 144 .pr_slowtimo = tcp_slowtimo, 145 .pr_drain = tcp_drain, 146 .pr_usrreqs = &tcp_usrreqs 147 }, 148 #ifdef SCTP 149 { 150 .pr_type = SOCK_SEQPACKET, 151 .pr_domain = &inetdomain, 152 .pr_protocol = IPPROTO_SCTP, 153 .pr_flags = PR_WANTRCVD|PR_LASTHDR, 154 .pr_input = sctp_input, 155 .pr_ctlinput = sctp_ctlinput, 156 .pr_ctloutput = sctp_ctloutput, 157 .pr_init = sctp_init, 158 .pr_drain = sctp_drain, 159 .pr_usrreqs = &sctp_usrreqs 160 }, 161 { 162 .pr_type = SOCK_STREAM, 163 .pr_domain = &inetdomain, 164 .pr_protocol = IPPROTO_SCTP, 165 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR, 166 .pr_input = sctp_input, 167 .pr_ctlinput = sctp_ctlinput, 168 .pr_ctloutput = sctp_ctloutput, 169 .pr_drain = sctp_drain, 170 .pr_usrreqs = &sctp_usrreqs 171 }, 172 #endif /* SCTP */ 173 { 174 .pr_type = SOCK_DGRAM, 175 .pr_domain = &inetdomain, 176 .pr_protocol = IPPROTO_UDPLITE, 177 .pr_flags = PR_ATOMIC|PR_ADDR, 178 .pr_input = udp_input, 179 .pr_ctlinput = udplite_ctlinput, 180 .pr_ctloutput = udp_ctloutput, 181 .pr_init = udplite_init, 182 .pr_usrreqs = &udp_usrreqs 183 }, 184 { 185 .pr_type = SOCK_RAW, 186 .pr_domain = &inetdomain, 187 .pr_protocol = IPPROTO_RAW, 188 .pr_flags = PR_ATOMIC|PR_ADDR, 189 .pr_input = rip_input, 190 .pr_ctlinput = rip_ctlinput, 191 .pr_ctloutput = rip_ctloutput, 192 .pr_usrreqs = &rip_usrreqs 193 }, 194 { 195 .pr_type = SOCK_RAW, 196 .pr_domain = &inetdomain, 197 .pr_protocol = IPPROTO_ICMP, 198 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 199 .pr_input = icmp_input, 200 .pr_ctloutput = rip_ctloutput, 201 .pr_usrreqs = &rip_usrreqs 202 }, 203 { 204 .pr_type = SOCK_RAW, 205 .pr_domain = &inetdomain, 206 .pr_protocol = IPPROTO_IGMP, 207 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 208 .pr_input = igmp_input, 209 .pr_ctloutput = rip_ctloutput, 210 .pr_fasttimo = igmp_fasttimo, 211 .pr_slowtimo = igmp_slowtimo, 212 .pr_usrreqs = &rip_usrreqs 213 }, 214 { 215 .pr_type = SOCK_RAW, 216 .pr_domain = &inetdomain, 217 .pr_protocol = IPPROTO_RSVP, 218 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 219 .pr_input = rsvp_input, 220 .pr_ctloutput = rip_ctloutput, 221 .pr_usrreqs = &rip_usrreqs 222 }, 223 { 224 .pr_type = SOCK_RAW, 225 .pr_domain = &inetdomain, 226 .pr_protocol = IPPROTO_IPV4, 227 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 228 .pr_input = encap4_input, 229 .pr_ctloutput = rip_ctloutput, 230 .pr_init = encap_init, 231 .pr_usrreqs = &rip_usrreqs 232 }, 233 { 234 .pr_type = SOCK_RAW, 235 .pr_domain = &inetdomain, 236 .pr_protocol = IPPROTO_MOBILE, 237 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 238 .pr_input = encap4_input, 239 .pr_ctloutput = rip_ctloutput, 240 .pr_init = encap_init, 241 .pr_usrreqs = &rip_usrreqs 242 }, 243 { 244 .pr_type = SOCK_RAW, 245 .pr_domain = &inetdomain, 246 .pr_protocol = IPPROTO_ETHERIP, 247 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 248 .pr_input = encap4_input, 249 .pr_ctloutput = rip_ctloutput, 250 .pr_init = encap_init, 251 .pr_usrreqs = &rip_usrreqs 252 }, 253 { 254 .pr_type = SOCK_RAW, 255 .pr_domain = &inetdomain, 256 .pr_protocol = IPPROTO_GRE, 257 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 258 .pr_input = encap4_input, 259 .pr_ctloutput = rip_ctloutput, 260 .pr_init = encap_init, 261 .pr_usrreqs = &rip_usrreqs 262 }, 263 # ifdef INET6 264 { 265 .pr_type = SOCK_RAW, 266 .pr_domain = &inetdomain, 267 .pr_protocol = IPPROTO_IPV6, 268 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 269 .pr_input = encap4_input, 270 .pr_ctloutput = rip_ctloutput, 271 .pr_init = encap_init, 272 .pr_usrreqs = &rip_usrreqs 273 }, 274 #endif 275 { 276 .pr_type = SOCK_RAW, 277 .pr_domain = &inetdomain, 278 .pr_protocol = IPPROTO_PIM, 279 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 280 .pr_input = encap4_input, 281 .pr_ctloutput = rip_ctloutput, 282 .pr_usrreqs = &rip_usrreqs 283 }, 284 /* Spacer n-times for loadable protocols. */ 285 IPPROTOSPACER, 286 IPPROTOSPACER, 287 IPPROTOSPACER, 288 IPPROTOSPACER, 289 IPPROTOSPACER, 290 IPPROTOSPACER, 291 IPPROTOSPACER, 292 IPPROTOSPACER, 293 /* raw wildcard */ 294 { 295 .pr_type = SOCK_RAW, 296 .pr_domain = &inetdomain, 297 .pr_flags = PR_ATOMIC|PR_ADDR, 298 .pr_input = rip_input, 299 .pr_ctloutput = rip_ctloutput, 300 .pr_init = rip_init, 301 .pr_usrreqs = &rip_usrreqs 302 }, 303 }; 304 305 extern int in_inithead(void **, int); 306 extern int in_detachhead(void **, int); 307 308 struct domain inetdomain = { 309 .dom_family = AF_INET, 310 .dom_name = "internet", 311 .dom_protosw = inetsw, 312 .dom_protoswNPROTOSW = &inetsw[nitems(inetsw)], 313 #ifdef RADIX_MPATH 314 .dom_rtattach = rn4_mpath_inithead, 315 #else 316 .dom_rtattach = in_inithead, 317 #endif 318 #ifdef VIMAGE 319 .dom_rtdetach = in_detachhead, 320 #endif 321 .dom_ifattach = in_domifattach, 322 .dom_ifdetach = in_domifdetach 323 }; 324 325 VNET_DOMAIN_SET(inet); 326 #endif /* INET */ 327 328 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 329 "Internet Family"); 330 331 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 332 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 333 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 334 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 335 #ifdef SCTP 336 SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP"); 337 #endif 338 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 339 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 340 /* XXX no protocol # to use, pick something "reserved" */ 341 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 342 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 343 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 344 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 345 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 346 #endif /* IPSEC */ 347 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 348 SYSCTL_NODE(_net_inet, OID_AUTO, accf, CTLFLAG_RW, 0, 349 "Accept filters"); 350