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/malloc.h> 46 #include <sys/socket.h> 47 #include <sys/domain.h> 48 #include <sys/proc.h> 49 #include <sys/protosw.h> 50 #include <sys/queue.h> 51 #include <sys/sysctl.h> 52 53 /* 54 * While this file provides the domain and protocol switch tables for IPv4, it 55 * also provides the sysctl node declarations for net.inet.* often shared with 56 * IPv6 for common features or by upper layer protocols. In case of no IPv4 57 * support compile out everything but these sysctl nodes. 58 */ 59 #ifdef INET 60 #include <net/if.h> 61 #include <net/if_var.h> 62 #include <net/route.h> 63 #ifdef RADIX_MPATH 64 #include <net/radix_mpath.h> 65 #endif 66 #include <net/vnet.h> 67 #endif /* INET */ 68 69 #if defined(INET) || defined(INET6) 70 #include <netinet/in.h> 71 #endif 72 73 #ifdef INET 74 #include <netinet/in_systm.h> 75 #include <netinet/in_var.h> 76 #include <netinet/ip.h> 77 #include <netinet/ip_var.h> 78 #include <netinet/ip_icmp.h> 79 #include <netinet/igmp_var.h> 80 #include <netinet/tcp.h> 81 #include <netinet/tcp_timer.h> 82 #include <netinet/tcp_var.h> 83 #include <netinet/udp.h> 84 #include <netinet/udp_var.h> 85 #include <netinet/ip_encap.h> 86 87 /* 88 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 89 */ 90 91 static struct pr_usrreqs nousrreqs; 92 93 #ifdef IPSEC 94 #include <netipsec/ipsec.h> 95 #endif /* IPSEC */ 96 97 #ifdef SCTP 98 #include <netinet/in_pcb.h> 99 #include <netinet/sctp_pcb.h> 100 #include <netinet/sctp.h> 101 #include <netinet/sctp_var.h> 102 #endif /* SCTP */ 103 104 FEATURE(inet, "Internet Protocol version 4"); 105 106 extern struct domain inetdomain; 107 108 /* Spacer for loadable protocols. */ 109 #define IPPROTOSPACER \ 110 { \ 111 .pr_domain = &inetdomain, \ 112 .pr_protocol = PROTO_SPACER, \ 113 .pr_usrreqs = &nousrreqs \ 114 } 115 116 struct protosw inetsw[] = { 117 { 118 .pr_type = 0, 119 .pr_domain = &inetdomain, 120 .pr_protocol = IPPROTO_IP, 121 .pr_init = ip_init, 122 #ifdef VIMAGE 123 .pr_destroy = ip_destroy, 124 #endif 125 .pr_slowtimo = ip_slowtimo, 126 .pr_drain = ip_drain, 127 .pr_usrreqs = &nousrreqs 128 }, 129 { 130 .pr_type = SOCK_DGRAM, 131 .pr_domain = &inetdomain, 132 .pr_protocol = IPPROTO_UDP, 133 .pr_flags = PR_ATOMIC|PR_ADDR, 134 .pr_input = udp_input, 135 .pr_ctlinput = udp_ctlinput, 136 .pr_ctloutput = udp_ctloutput, 137 .pr_init = udp_init, 138 #ifdef VIMAGE 139 .pr_destroy = udp_destroy, 140 #endif 141 .pr_usrreqs = &udp_usrreqs 142 }, 143 { 144 .pr_type = SOCK_STREAM, 145 .pr_domain = &inetdomain, 146 .pr_protocol = IPPROTO_TCP, 147 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 148 .pr_input = tcp_input, 149 .pr_ctlinput = tcp_ctlinput, 150 .pr_ctloutput = tcp_ctloutput, 151 .pr_init = tcp_init, 152 #ifdef VIMAGE 153 .pr_destroy = tcp_destroy, 154 #endif 155 .pr_slowtimo = tcp_slowtimo, 156 .pr_drain = tcp_drain, 157 .pr_usrreqs = &tcp_usrreqs 158 }, 159 #ifdef SCTP 160 { 161 .pr_type = SOCK_SEQPACKET, 162 .pr_domain = &inetdomain, 163 .pr_protocol = IPPROTO_SCTP, 164 .pr_flags = PR_WANTRCVD, 165 .pr_input = sctp_input, 166 .pr_ctlinput = sctp_ctlinput, 167 .pr_ctloutput = sctp_ctloutput, 168 .pr_init = sctp_init, 169 #ifdef VIMAGE 170 .pr_destroy = sctp_finish, 171 #endif 172 .pr_drain = sctp_drain, 173 .pr_usrreqs = &sctp_usrreqs 174 }, 175 { 176 .pr_type = SOCK_STREAM, 177 .pr_domain = &inetdomain, 178 .pr_protocol = IPPROTO_SCTP, 179 .pr_flags = PR_WANTRCVD, 180 .pr_input = sctp_input, 181 .pr_ctlinput = sctp_ctlinput, 182 .pr_ctloutput = sctp_ctloutput, 183 .pr_drain = sctp_drain, 184 .pr_usrreqs = &sctp_usrreqs 185 }, 186 #endif /* SCTP */ 187 { 188 .pr_type = SOCK_DGRAM, 189 .pr_domain = &inetdomain, 190 .pr_protocol = IPPROTO_UDPLITE, 191 .pr_flags = PR_ATOMIC|PR_ADDR, 192 .pr_input = udp_input, 193 .pr_ctlinput = udplite_ctlinput, 194 .pr_ctloutput = udp_ctloutput, 195 .pr_init = udplite_init, 196 #ifdef VIMAGE 197 .pr_destroy = udplite_destroy, 198 #endif 199 .pr_usrreqs = &udp_usrreqs 200 }, 201 { 202 .pr_type = SOCK_RAW, 203 .pr_domain = &inetdomain, 204 .pr_protocol = IPPROTO_RAW, 205 .pr_flags = PR_ATOMIC|PR_ADDR, 206 .pr_input = rip_input, 207 .pr_ctlinput = rip_ctlinput, 208 .pr_ctloutput = rip_ctloutput, 209 .pr_usrreqs = &rip_usrreqs 210 }, 211 { 212 .pr_type = SOCK_RAW, 213 .pr_domain = &inetdomain, 214 .pr_protocol = IPPROTO_ICMP, 215 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 216 .pr_input = icmp_input, 217 .pr_ctloutput = rip_ctloutput, 218 .pr_usrreqs = &rip_usrreqs 219 }, 220 { 221 .pr_type = SOCK_RAW, 222 .pr_domain = &inetdomain, 223 .pr_protocol = IPPROTO_IGMP, 224 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 225 .pr_input = igmp_input, 226 .pr_ctloutput = rip_ctloutput, 227 .pr_fasttimo = igmp_fasttimo, 228 .pr_slowtimo = igmp_slowtimo, 229 .pr_usrreqs = &rip_usrreqs 230 }, 231 { 232 .pr_type = SOCK_RAW, 233 .pr_domain = &inetdomain, 234 .pr_protocol = IPPROTO_RSVP, 235 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 236 .pr_input = rsvp_input, 237 .pr_ctloutput = rip_ctloutput, 238 .pr_usrreqs = &rip_usrreqs 239 }, 240 #ifdef IPSEC 241 { 242 .pr_type = SOCK_RAW, 243 .pr_domain = &inetdomain, 244 .pr_protocol = IPPROTO_AH, 245 .pr_flags = PR_ATOMIC|PR_ADDR, 246 .pr_input = ah4_input, 247 .pr_ctlinput = ah4_ctlinput, 248 .pr_usrreqs = &nousrreqs 249 }, 250 { 251 .pr_type = SOCK_RAW, 252 .pr_domain = &inetdomain, 253 .pr_protocol = IPPROTO_ESP, 254 .pr_flags = PR_ATOMIC|PR_ADDR, 255 .pr_input = esp4_input, 256 .pr_ctlinput = esp4_ctlinput, 257 .pr_usrreqs = &nousrreqs 258 }, 259 { 260 .pr_type = SOCK_RAW, 261 .pr_domain = &inetdomain, 262 .pr_protocol = IPPROTO_IPCOMP, 263 .pr_flags = PR_ATOMIC|PR_ADDR, 264 .pr_input = ipcomp4_input, 265 .pr_usrreqs = &nousrreqs 266 }, 267 #endif /* IPSEC */ 268 { 269 .pr_type = SOCK_RAW, 270 .pr_domain = &inetdomain, 271 .pr_protocol = IPPROTO_IPV4, 272 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 273 .pr_input = encap4_input, 274 .pr_ctloutput = rip_ctloutput, 275 .pr_init = encap_init, 276 .pr_usrreqs = &rip_usrreqs 277 }, 278 { 279 .pr_type = SOCK_RAW, 280 .pr_domain = &inetdomain, 281 .pr_protocol = IPPROTO_MOBILE, 282 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 283 .pr_input = encap4_input, 284 .pr_ctloutput = rip_ctloutput, 285 .pr_init = encap_init, 286 .pr_usrreqs = &rip_usrreqs 287 }, 288 { 289 .pr_type = SOCK_RAW, 290 .pr_domain = &inetdomain, 291 .pr_protocol = IPPROTO_ETHERIP, 292 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 293 .pr_input = encap4_input, 294 .pr_ctloutput = rip_ctloutput, 295 .pr_init = encap_init, 296 .pr_usrreqs = &rip_usrreqs 297 }, 298 { 299 .pr_type = SOCK_RAW, 300 .pr_domain = &inetdomain, 301 .pr_protocol = IPPROTO_GRE, 302 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 303 .pr_input = encap4_input, 304 .pr_ctloutput = rip_ctloutput, 305 .pr_init = encap_init, 306 .pr_usrreqs = &rip_usrreqs 307 }, 308 # ifdef INET6 309 { 310 .pr_type = SOCK_RAW, 311 .pr_domain = &inetdomain, 312 .pr_protocol = IPPROTO_IPV6, 313 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 314 .pr_input = encap4_input, 315 .pr_ctloutput = rip_ctloutput, 316 .pr_init = encap_init, 317 .pr_usrreqs = &rip_usrreqs 318 }, 319 #endif 320 { 321 .pr_type = SOCK_RAW, 322 .pr_domain = &inetdomain, 323 .pr_protocol = IPPROTO_PIM, 324 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 325 .pr_input = encap4_input, 326 .pr_ctloutput = rip_ctloutput, 327 .pr_usrreqs = &rip_usrreqs 328 }, 329 /* Spacer n-times for loadable protocols. */ 330 IPPROTOSPACER, 331 IPPROTOSPACER, 332 IPPROTOSPACER, 333 IPPROTOSPACER, 334 IPPROTOSPACER, 335 IPPROTOSPACER, 336 IPPROTOSPACER, 337 IPPROTOSPACER, 338 /* raw wildcard */ 339 { 340 .pr_type = SOCK_RAW, 341 .pr_domain = &inetdomain, 342 .pr_flags = PR_ATOMIC|PR_ADDR, 343 .pr_input = rip_input, 344 .pr_ctloutput = rip_ctloutput, 345 .pr_init = rip_init, 346 #ifdef VIMAGE 347 .pr_destroy = rip_destroy, 348 #endif 349 .pr_usrreqs = &rip_usrreqs 350 }, 351 }; 352 353 extern int in_inithead(void **, int); 354 extern int in_detachhead(void **, int); 355 356 struct domain inetdomain = { 357 .dom_family = AF_INET, 358 .dom_name = "internet", 359 .dom_protosw = inetsw, 360 .dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 361 #ifdef RADIX_MPATH 362 .dom_rtattach = rn4_mpath_inithead, 363 #else 364 .dom_rtattach = in_inithead, 365 #endif 366 #ifdef VIMAGE 367 .dom_rtdetach = in_detachhead, 368 #endif 369 .dom_ifattach = in_domifattach, 370 .dom_ifdetach = in_domifdetach 371 }; 372 373 VNET_DOMAIN_SET(inet); 374 #endif /* INET */ 375 376 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 377 "Internet Family"); 378 379 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 380 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 381 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 382 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 383 #ifdef SCTP 384 SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP"); 385 #endif 386 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 387 #ifdef IPSEC 388 /* XXX no protocol # to use, pick something "reserved" */ 389 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 390 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 391 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 392 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 393 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 394 #endif /* IPSEC */ 395 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 396 SYSCTL_NODE(_net_inet, OID_AUTO, accf, CTLFLAG_RW, 0, 397 "Accept filters"); 398