1 /*- 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)in_proto.c 8.2 (Berkeley) 2/9/95 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "opt_mrouting.h" 36 #include "opt_ipsec.h" 37 #include "opt_inet.h" 38 #include "opt_inet6.h" 39 #include "opt_sctp.h" 40 #include "opt_mpath.h" 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/socket.h> 46 #include <sys/domain.h> 47 #include <sys/proc.h> 48 #include <sys/protosw.h> 49 #include <sys/queue.h> 50 #include <sys/sysctl.h> 51 52 /* 53 * While this file provides the domain and protocol switch tables for IPv4, it 54 * also provides the sysctl node declarations for net.inet.* often shared with 55 * IPv6 for common features or by upper layer protocols. In case of no IPv4 56 * support compile out everything but these sysctl nodes. 57 */ 58 #ifdef INET 59 #include <net/if.h> 60 #include <net/if_var.h> 61 #include <net/route.h> 62 #ifdef RADIX_MPATH 63 #include <net/radix_mpath.h> 64 #endif 65 #include <net/vnet.h> 66 #endif /* INET */ 67 68 #if defined(INET) || defined(INET6) 69 #include <netinet/in.h> 70 #endif 71 72 #ifdef INET 73 #include <netinet/in_systm.h> 74 #include <netinet/in_var.h> 75 #include <netinet/ip.h> 76 #include <netinet/ip_var.h> 77 #include <netinet/ip_icmp.h> 78 #include <netinet/igmp_var.h> 79 #include <netinet/tcp.h> 80 #include <netinet/tcp_timer.h> 81 #include <netinet/tcp_var.h> 82 #include <netinet/udp.h> 83 #include <netinet/udp_var.h> 84 #include <netinet/ip_encap.h> 85 86 /* 87 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 88 */ 89 90 static struct pr_usrreqs nousrreqs; 91 92 #ifdef IPSEC 93 #include <netipsec/ipsec.h> 94 #endif /* IPSEC */ 95 96 #ifdef SCTP 97 #include <netinet/in_pcb.h> 98 #include <netinet/sctp_pcb.h> 99 #include <netinet/sctp.h> 100 #include <netinet/sctp_var.h> 101 #endif /* SCTP */ 102 103 FEATURE(inet, "Internet Protocol version 4"); 104 105 extern struct domain inetdomain; 106 107 /* Spacer for loadable protocols. */ 108 #define IPPROTOSPACER \ 109 { \ 110 .pr_domain = &inetdomain, \ 111 .pr_protocol = PROTO_SPACER, \ 112 .pr_usrreqs = &nousrreqs \ 113 } 114 115 struct protosw inetsw[] = { 116 { 117 .pr_type = 0, 118 .pr_domain = &inetdomain, 119 .pr_protocol = IPPROTO_IP, 120 .pr_init = ip_init, 121 #ifdef VIMAGE 122 .pr_destroy = ip_destroy, 123 #endif 124 .pr_slowtimo = ip_slowtimo, 125 .pr_drain = ip_drain, 126 .pr_usrreqs = &nousrreqs 127 }, 128 { 129 .pr_type = SOCK_DGRAM, 130 .pr_domain = &inetdomain, 131 .pr_protocol = IPPROTO_UDP, 132 .pr_flags = PR_ATOMIC|PR_ADDR, 133 .pr_input = udp_input, 134 .pr_ctlinput = udp_ctlinput, 135 .pr_ctloutput = udp_ctloutput, 136 .pr_init = udp_init, 137 #ifdef VIMAGE 138 .pr_destroy = udp_destroy, 139 #endif 140 .pr_usrreqs = &udp_usrreqs 141 }, 142 { 143 .pr_type = SOCK_STREAM, 144 .pr_domain = &inetdomain, 145 .pr_protocol = IPPROTO_TCP, 146 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 147 .pr_input = tcp_input, 148 .pr_ctlinput = tcp_ctlinput, 149 .pr_ctloutput = tcp_ctloutput, 150 .pr_init = tcp_init, 151 #ifdef VIMAGE 152 .pr_destroy = tcp_destroy, 153 #endif 154 .pr_slowtimo = tcp_slowtimo, 155 .pr_drain = tcp_drain, 156 .pr_usrreqs = &tcp_usrreqs 157 }, 158 #ifdef SCTP 159 { 160 .pr_type = SOCK_SEQPACKET, 161 .pr_domain = &inetdomain, 162 .pr_protocol = IPPROTO_SCTP, 163 .pr_flags = PR_WANTRCVD, 164 .pr_input = sctp_input, 165 .pr_ctlinput = sctp_ctlinput, 166 .pr_ctloutput = sctp_ctloutput, 167 .pr_init = sctp_init, 168 #ifdef VIMAGE 169 .pr_destroy = sctp_finish, 170 #endif 171 .pr_drain = sctp_drain, 172 .pr_usrreqs = &sctp_usrreqs 173 }, 174 { 175 .pr_type = SOCK_STREAM, 176 .pr_domain = &inetdomain, 177 .pr_protocol = IPPROTO_SCTP, 178 .pr_flags = PR_WANTRCVD, 179 .pr_input = sctp_input, 180 .pr_ctlinput = sctp_ctlinput, 181 .pr_ctloutput = sctp_ctloutput, 182 .pr_drain = sctp_drain, 183 .pr_usrreqs = &sctp_usrreqs 184 }, 185 #endif /* SCTP */ 186 { 187 .pr_type = SOCK_DGRAM, 188 .pr_domain = &inetdomain, 189 .pr_protocol = IPPROTO_UDPLITE, 190 .pr_flags = PR_ATOMIC|PR_ADDR, 191 .pr_input = udp_input, 192 .pr_ctlinput = udplite_ctlinput, 193 .pr_ctloutput = udp_ctloutput, 194 .pr_init = udplite_init, 195 #ifdef VIMAGE 196 .pr_destroy = udplite_destroy, 197 #endif 198 .pr_usrreqs = &udp_usrreqs 199 }, 200 { 201 .pr_type = SOCK_RAW, 202 .pr_domain = &inetdomain, 203 .pr_protocol = IPPROTO_RAW, 204 .pr_flags = PR_ATOMIC|PR_ADDR, 205 .pr_input = rip_input, 206 .pr_ctlinput = rip_ctlinput, 207 .pr_ctloutput = rip_ctloutput, 208 .pr_usrreqs = &rip_usrreqs 209 }, 210 { 211 .pr_type = SOCK_RAW, 212 .pr_domain = &inetdomain, 213 .pr_protocol = IPPROTO_ICMP, 214 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 215 .pr_input = icmp_input, 216 .pr_ctloutput = rip_ctloutput, 217 .pr_usrreqs = &rip_usrreqs 218 }, 219 { 220 .pr_type = SOCK_RAW, 221 .pr_domain = &inetdomain, 222 .pr_protocol = IPPROTO_IGMP, 223 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 224 .pr_input = igmp_input, 225 .pr_ctloutput = rip_ctloutput, 226 .pr_fasttimo = igmp_fasttimo, 227 .pr_slowtimo = igmp_slowtimo, 228 .pr_usrreqs = &rip_usrreqs 229 }, 230 { 231 .pr_type = SOCK_RAW, 232 .pr_domain = &inetdomain, 233 .pr_protocol = IPPROTO_RSVP, 234 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 235 .pr_input = rsvp_input, 236 .pr_ctloutput = rip_ctloutput, 237 .pr_usrreqs = &rip_usrreqs 238 }, 239 #ifdef IPSEC 240 { 241 .pr_type = SOCK_RAW, 242 .pr_domain = &inetdomain, 243 .pr_protocol = IPPROTO_AH, 244 .pr_flags = PR_ATOMIC|PR_ADDR, 245 .pr_input = ah4_input, 246 .pr_ctlinput = ah4_ctlinput, 247 .pr_usrreqs = &nousrreqs 248 }, 249 { 250 .pr_type = SOCK_RAW, 251 .pr_domain = &inetdomain, 252 .pr_protocol = IPPROTO_ESP, 253 .pr_flags = PR_ATOMIC|PR_ADDR, 254 .pr_input = esp4_input, 255 .pr_ctlinput = esp4_ctlinput, 256 .pr_usrreqs = &nousrreqs 257 }, 258 { 259 .pr_type = SOCK_RAW, 260 .pr_domain = &inetdomain, 261 .pr_protocol = IPPROTO_IPCOMP, 262 .pr_flags = PR_ATOMIC|PR_ADDR, 263 .pr_input = ipcomp4_input, 264 .pr_usrreqs = &nousrreqs 265 }, 266 #endif /* IPSEC */ 267 { 268 .pr_type = SOCK_RAW, 269 .pr_domain = &inetdomain, 270 .pr_protocol = IPPROTO_IPV4, 271 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 272 .pr_input = encap4_input, 273 .pr_ctloutput = rip_ctloutput, 274 .pr_init = encap_init, 275 .pr_usrreqs = &rip_usrreqs 276 }, 277 { 278 .pr_type = SOCK_RAW, 279 .pr_domain = &inetdomain, 280 .pr_protocol = IPPROTO_MOBILE, 281 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 282 .pr_input = encap4_input, 283 .pr_ctloutput = rip_ctloutput, 284 .pr_init = encap_init, 285 .pr_usrreqs = &rip_usrreqs 286 }, 287 { 288 .pr_type = SOCK_RAW, 289 .pr_domain = &inetdomain, 290 .pr_protocol = IPPROTO_ETHERIP, 291 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 292 .pr_input = encap4_input, 293 .pr_ctloutput = rip_ctloutput, 294 .pr_init = encap_init, 295 .pr_usrreqs = &rip_usrreqs 296 }, 297 { 298 .pr_type = SOCK_RAW, 299 .pr_domain = &inetdomain, 300 .pr_protocol = IPPROTO_GRE, 301 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 302 .pr_input = encap4_input, 303 .pr_ctloutput = rip_ctloutput, 304 .pr_init = encap_init, 305 .pr_usrreqs = &rip_usrreqs 306 }, 307 # ifdef INET6 308 { 309 .pr_type = SOCK_RAW, 310 .pr_domain = &inetdomain, 311 .pr_protocol = IPPROTO_IPV6, 312 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 313 .pr_input = encap4_input, 314 .pr_ctloutput = rip_ctloutput, 315 .pr_init = encap_init, 316 .pr_usrreqs = &rip_usrreqs 317 }, 318 #endif 319 { 320 .pr_type = SOCK_RAW, 321 .pr_domain = &inetdomain, 322 .pr_protocol = IPPROTO_PIM, 323 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 324 .pr_input = encap4_input, 325 .pr_ctloutput = rip_ctloutput, 326 .pr_usrreqs = &rip_usrreqs 327 }, 328 /* Spacer n-times for loadable protocols. */ 329 IPPROTOSPACER, 330 IPPROTOSPACER, 331 IPPROTOSPACER, 332 IPPROTOSPACER, 333 IPPROTOSPACER, 334 IPPROTOSPACER, 335 IPPROTOSPACER, 336 IPPROTOSPACER, 337 /* raw wildcard */ 338 { 339 .pr_type = SOCK_RAW, 340 .pr_domain = &inetdomain, 341 .pr_flags = PR_ATOMIC|PR_ADDR, 342 .pr_input = rip_input, 343 .pr_ctloutput = rip_ctloutput, 344 .pr_init = rip_init, 345 #ifdef VIMAGE 346 .pr_destroy = rip_destroy, 347 #endif 348 .pr_usrreqs = &rip_usrreqs 349 }, 350 }; 351 352 extern int in_inithead(void **, int); 353 extern int in_detachhead(void **, int); 354 355 struct domain inetdomain = { 356 .dom_family = AF_INET, 357 .dom_name = "internet", 358 .dom_protosw = inetsw, 359 .dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 360 #ifdef RADIX_MPATH 361 .dom_rtattach = rn4_mpath_inithead, 362 #else 363 .dom_rtattach = in_inithead, 364 #endif 365 #ifdef VIMAGE 366 .dom_rtdetach = in_detachhead, 367 #endif 368 .dom_ifattach = in_domifattach, 369 .dom_ifdetach = in_domifdetach 370 }; 371 372 VNET_DOMAIN_SET(inet); 373 #endif /* INET */ 374 375 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 376 "Internet Family"); 377 378 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 379 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 380 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 381 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 382 #ifdef SCTP 383 SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP"); 384 #endif 385 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 386 #ifdef IPSEC 387 /* XXX no protocol # to use, pick something "reserved" */ 388 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 389 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 390 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 391 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 392 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 393 #endif /* IPSEC */ 394 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 395 SYSCTL_NODE(_net_inet, OID_AUTO, accf, CTLFLAG_RW, 0, 396 "Accept filters"); 397