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_ipx.h" 36 #include "opt_mrouting.h" 37 #include "opt_ipsec.h" 38 #include "opt_inet.h" 39 #include "opt_inet6.h" 40 #include "opt_sctp.h" 41 #include "opt_mpath.h" 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.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_RAW, 189 .pr_domain = &inetdomain, 190 .pr_protocol = IPPROTO_RAW, 191 .pr_flags = PR_ATOMIC|PR_ADDR, 192 .pr_input = rip_input, 193 .pr_ctlinput = rip_ctlinput, 194 .pr_ctloutput = rip_ctloutput, 195 .pr_usrreqs = &rip_usrreqs 196 }, 197 { 198 .pr_type = SOCK_RAW, 199 .pr_domain = &inetdomain, 200 .pr_protocol = IPPROTO_ICMP, 201 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 202 .pr_input = icmp_input, 203 .pr_ctloutput = rip_ctloutput, 204 .pr_usrreqs = &rip_usrreqs 205 }, 206 { 207 .pr_type = SOCK_RAW, 208 .pr_domain = &inetdomain, 209 .pr_protocol = IPPROTO_IGMP, 210 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 211 .pr_input = igmp_input, 212 .pr_ctloutput = rip_ctloutput, 213 .pr_fasttimo = igmp_fasttimo, 214 .pr_slowtimo = igmp_slowtimo, 215 .pr_usrreqs = &rip_usrreqs 216 }, 217 { 218 .pr_type = SOCK_RAW, 219 .pr_domain = &inetdomain, 220 .pr_protocol = IPPROTO_RSVP, 221 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 222 .pr_input = rsvp_input, 223 .pr_ctloutput = rip_ctloutput, 224 .pr_usrreqs = &rip_usrreqs 225 }, 226 #ifdef IPSEC 227 { 228 .pr_type = SOCK_RAW, 229 .pr_domain = &inetdomain, 230 .pr_protocol = IPPROTO_AH, 231 .pr_flags = PR_ATOMIC|PR_ADDR, 232 .pr_input = ah4_input, 233 .pr_ctlinput = ah4_ctlinput, 234 .pr_usrreqs = &nousrreqs 235 }, 236 { 237 .pr_type = SOCK_RAW, 238 .pr_domain = &inetdomain, 239 .pr_protocol = IPPROTO_ESP, 240 .pr_flags = PR_ATOMIC|PR_ADDR, 241 .pr_input = esp4_input, 242 .pr_ctlinput = esp4_ctlinput, 243 .pr_usrreqs = &nousrreqs 244 }, 245 { 246 .pr_type = SOCK_RAW, 247 .pr_domain = &inetdomain, 248 .pr_protocol = IPPROTO_IPCOMP, 249 .pr_flags = PR_ATOMIC|PR_ADDR, 250 .pr_input = ipcomp4_input, 251 .pr_usrreqs = &nousrreqs 252 }, 253 #endif /* IPSEC */ 254 { 255 .pr_type = SOCK_RAW, 256 .pr_domain = &inetdomain, 257 .pr_protocol = IPPROTO_IPV4, 258 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 259 .pr_input = encap4_input, 260 .pr_ctloutput = rip_ctloutput, 261 .pr_init = encap_init, 262 .pr_usrreqs = &rip_usrreqs 263 }, 264 { 265 .pr_type = SOCK_RAW, 266 .pr_domain = &inetdomain, 267 .pr_protocol = IPPROTO_MOBILE, 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 { 275 .pr_type = SOCK_RAW, 276 .pr_domain = &inetdomain, 277 .pr_protocol = IPPROTO_ETHERIP, 278 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 279 .pr_input = encap4_input, 280 .pr_ctloutput = rip_ctloutput, 281 .pr_init = encap_init, 282 .pr_usrreqs = &rip_usrreqs 283 }, 284 { 285 .pr_type = SOCK_RAW, 286 .pr_domain = &inetdomain, 287 .pr_protocol = IPPROTO_GRE, 288 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 289 .pr_input = encap4_input, 290 .pr_ctloutput = rip_ctloutput, 291 .pr_init = encap_init, 292 .pr_usrreqs = &rip_usrreqs 293 }, 294 # ifdef INET6 295 { 296 .pr_type = SOCK_RAW, 297 .pr_domain = &inetdomain, 298 .pr_protocol = IPPROTO_IPV6, 299 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 300 .pr_input = encap4_input, 301 .pr_ctloutput = rip_ctloutput, 302 .pr_init = encap_init, 303 .pr_usrreqs = &rip_usrreqs 304 }, 305 #endif 306 { 307 .pr_type = SOCK_RAW, 308 .pr_domain = &inetdomain, 309 .pr_protocol = IPPROTO_PIM, 310 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 311 .pr_input = encap4_input, 312 .pr_ctloutput = rip_ctloutput, 313 .pr_usrreqs = &rip_usrreqs 314 }, 315 /* Spacer n-times for loadable protocols. */ 316 IPPROTOSPACER, 317 IPPROTOSPACER, 318 IPPROTOSPACER, 319 IPPROTOSPACER, 320 IPPROTOSPACER, 321 IPPROTOSPACER, 322 IPPROTOSPACER, 323 IPPROTOSPACER, 324 /* raw wildcard */ 325 { 326 .pr_type = SOCK_RAW, 327 .pr_domain = &inetdomain, 328 .pr_flags = PR_ATOMIC|PR_ADDR, 329 .pr_input = rip_input, 330 .pr_ctloutput = rip_ctloutput, 331 .pr_init = rip_init, 332 #ifdef VIMAGE 333 .pr_destroy = rip_destroy, 334 #endif 335 .pr_usrreqs = &rip_usrreqs 336 }, 337 }; 338 339 extern int in_inithead(void **, int); 340 extern int in_detachhead(void **, int); 341 342 struct domain inetdomain = { 343 .dom_family = AF_INET, 344 .dom_name = "internet", 345 .dom_protosw = inetsw, 346 .dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 347 #ifdef RADIX_MPATH 348 .dom_rtattach = rn4_mpath_inithead, 349 #else 350 .dom_rtattach = in_inithead, 351 #endif 352 #ifdef VIMAGE 353 .dom_rtdetach = in_detachhead, 354 #endif 355 .dom_rtoffset = 32, 356 .dom_maxrtkey = sizeof(struct sockaddr_in), 357 .dom_ifattach = in_domifattach, 358 .dom_ifdetach = in_domifdetach 359 }; 360 361 VNET_DOMAIN_SET(inet); 362 #endif /* INET */ 363 364 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 365 "Internet Family"); 366 367 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 368 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 369 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 370 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 371 #ifdef SCTP 372 SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP"); 373 #endif 374 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 375 #ifdef IPSEC 376 /* XXX no protocol # to use, pick something "reserved" */ 377 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 378 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 379 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 380 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 381 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 382 #endif /* IPSEC */ 383 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 384