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_inet6.h" 39 #include "opt_pf.h" 40 #include "opt_carp.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/socket.h> 48 #include <sys/domain.h> 49 #include <sys/proc.h> 50 #include <sys/protosw.h> 51 #include <sys/queue.h> 52 #include <sys/sysctl.h> 53 54 #include <net/if.h> 55 #include <net/route.h> 56 #ifdef RADIX_MPATH 57 #include <net/radix_mpath.h> 58 #endif 59 #include <net/vnet.h> 60 61 #include <netinet/in.h> 62 #include <netinet/in_systm.h> 63 #include <netinet/in_var.h> 64 #include <netinet/ip.h> 65 #include <netinet/ip_var.h> 66 #include <netinet/ip_icmp.h> 67 #include <netinet/igmp_var.h> 68 #include <netinet/tcp.h> 69 #include <netinet/tcp_timer.h> 70 #include <netinet/tcp_var.h> 71 #include <netinet/udp.h> 72 #include <netinet/udp_var.h> 73 #include <netinet/ip_encap.h> 74 75 /* 76 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 77 */ 78 79 static struct pr_usrreqs nousrreqs; 80 81 #ifdef IPSEC 82 #include <netipsec/ipsec.h> 83 #endif /* IPSEC */ 84 85 #ifdef SCTP 86 #include <netinet/in_pcb.h> 87 #include <netinet/sctp_pcb.h> 88 #include <netinet/sctp.h> 89 #include <netinet/sctp_var.h> 90 #endif /* SCTP */ 91 92 #ifdef DEV_PFSYNC 93 #include <net/pfvar.h> 94 #include <net/if_pfsync.h> 95 #endif 96 97 #ifdef DEV_CARP 98 #include <netinet/ip_carp.h> 99 #endif 100 101 extern struct domain inetdomain; 102 103 /* Spacer for loadable protocols. */ 104 #define IPPROTOSPACER \ 105 { \ 106 .pr_domain = &inetdomain, \ 107 .pr_protocol = PROTO_SPACER, \ 108 .pr_usrreqs = &nousrreqs \ 109 } 110 111 struct protosw inetsw[] = { 112 { 113 .pr_type = 0, 114 .pr_domain = &inetdomain, 115 .pr_protocol = IPPROTO_IP, 116 .pr_init = ip_init, 117 .pr_slowtimo = ip_slowtimo, 118 .pr_drain = ip_drain, 119 .pr_usrreqs = &nousrreqs 120 }, 121 { 122 .pr_type = SOCK_DGRAM, 123 .pr_domain = &inetdomain, 124 .pr_protocol = IPPROTO_UDP, 125 .pr_flags = PR_ATOMIC|PR_ADDR, 126 .pr_input = udp_input, 127 .pr_ctlinput = udp_ctlinput, 128 .pr_ctloutput = udp_ctloutput, 129 .pr_init = udp_init, 130 #ifdef VIMAGE 131 .pr_destroy = udp_destroy, 132 #endif 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 #ifdef VIMAGE 145 .pr_destroy = tcp_destroy, 146 #endif 147 .pr_slowtimo = tcp_slowtimo, 148 .pr_drain = tcp_drain, 149 .pr_usrreqs = &tcp_usrreqs 150 }, 151 #ifdef SCTP 152 { 153 .pr_type = SOCK_DGRAM, 154 .pr_domain = &inetdomain, 155 .pr_protocol = IPPROTO_SCTP, 156 .pr_flags = PR_WANTRCVD, 157 .pr_input = sctp_input, 158 .pr_ctlinput = sctp_ctlinput, 159 .pr_ctloutput = sctp_ctloutput, 160 .pr_init = sctp_init, 161 .pr_drain = sctp_drain, 162 .pr_usrreqs = &sctp_usrreqs 163 }, 164 { 165 .pr_type = SOCK_SEQPACKET, 166 .pr_domain = &inetdomain, 167 .pr_protocol = IPPROTO_SCTP, 168 .pr_flags = PR_WANTRCVD, 169 .pr_input = sctp_input, 170 .pr_ctlinput = sctp_ctlinput, 171 .pr_ctloutput = sctp_ctloutput, 172 .pr_drain = sctp_drain, 173 .pr_usrreqs = &sctp_usrreqs 174 }, 175 176 { 177 .pr_type = SOCK_STREAM, 178 .pr_domain = &inetdomain, 179 .pr_protocol = IPPROTO_SCTP, 180 .pr_flags = PR_WANTRCVD, 181 .pr_input = sctp_input, 182 .pr_ctlinput = sctp_ctlinput, 183 .pr_ctloutput = sctp_ctloutput, 184 .pr_drain = sctp_drain, 185 .pr_usrreqs = &sctp_usrreqs 186 }, 187 #endif /* SCTP */ 188 { 189 .pr_type = SOCK_RAW, 190 .pr_domain = &inetdomain, 191 .pr_protocol = IPPROTO_RAW, 192 .pr_flags = PR_ATOMIC|PR_ADDR, 193 .pr_input = rip_input, 194 .pr_ctlinput = rip_ctlinput, 195 .pr_ctloutput = rip_ctloutput, 196 .pr_usrreqs = &rip_usrreqs 197 }, 198 { 199 .pr_type = SOCK_RAW, 200 .pr_domain = &inetdomain, 201 .pr_protocol = IPPROTO_ICMP, 202 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 203 .pr_input = icmp_input, 204 .pr_ctloutput = rip_ctloutput, 205 .pr_init = icmp_init, 206 .pr_usrreqs = &rip_usrreqs 207 }, 208 { 209 .pr_type = SOCK_RAW, 210 .pr_domain = &inetdomain, 211 .pr_protocol = IPPROTO_IGMP, 212 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 213 .pr_input = igmp_input, 214 .pr_ctloutput = rip_ctloutput, 215 .pr_fasttimo = igmp_fasttimo, 216 .pr_slowtimo = igmp_slowtimo, 217 .pr_usrreqs = &rip_usrreqs 218 }, 219 { 220 .pr_type = SOCK_RAW, 221 .pr_domain = &inetdomain, 222 .pr_protocol = IPPROTO_RSVP, 223 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 224 .pr_input = rsvp_input, 225 .pr_ctloutput = rip_ctloutput, 226 .pr_usrreqs = &rip_usrreqs 227 }, 228 #ifdef IPSEC 229 { 230 .pr_type = SOCK_RAW, 231 .pr_domain = &inetdomain, 232 .pr_protocol = IPPROTO_AH, 233 .pr_flags = PR_ATOMIC|PR_ADDR, 234 .pr_input = ah4_input, 235 .pr_ctlinput = ah4_ctlinput, 236 .pr_usrreqs = &nousrreqs 237 }, 238 { 239 .pr_type = SOCK_RAW, 240 .pr_domain = &inetdomain, 241 .pr_protocol = IPPROTO_ESP, 242 .pr_flags = PR_ATOMIC|PR_ADDR, 243 .pr_input = esp4_input, 244 .pr_ctlinput = esp4_ctlinput, 245 .pr_usrreqs = &nousrreqs 246 }, 247 { 248 .pr_type = SOCK_RAW, 249 .pr_domain = &inetdomain, 250 .pr_protocol = IPPROTO_IPCOMP, 251 .pr_flags = PR_ATOMIC|PR_ADDR, 252 .pr_input = ipcomp4_input, 253 .pr_usrreqs = &nousrreqs 254 }, 255 #endif /* IPSEC */ 256 { 257 .pr_type = SOCK_RAW, 258 .pr_domain = &inetdomain, 259 .pr_protocol = IPPROTO_IPV4, 260 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 261 .pr_input = encap4_input, 262 .pr_ctloutput = rip_ctloutput, 263 .pr_init = encap_init, 264 .pr_usrreqs = &rip_usrreqs 265 }, 266 { 267 .pr_type = SOCK_RAW, 268 .pr_domain = &inetdomain, 269 .pr_protocol = IPPROTO_MOBILE, 270 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 271 .pr_input = encap4_input, 272 .pr_ctloutput = rip_ctloutput, 273 .pr_init = encap_init, 274 .pr_usrreqs = &rip_usrreqs 275 }, 276 { 277 .pr_type = SOCK_RAW, 278 .pr_domain = &inetdomain, 279 .pr_protocol = IPPROTO_ETHERIP, 280 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 281 .pr_input = encap4_input, 282 .pr_ctloutput = rip_ctloutput, 283 .pr_init = encap_init, 284 .pr_usrreqs = &rip_usrreqs 285 }, 286 { 287 .pr_type = SOCK_RAW, 288 .pr_domain = &inetdomain, 289 .pr_protocol = IPPROTO_GRE, 290 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 291 .pr_input = encap4_input, 292 .pr_ctloutput = rip_ctloutput, 293 .pr_init = encap_init, 294 .pr_usrreqs = &rip_usrreqs 295 }, 296 # ifdef INET6 297 { 298 .pr_type = SOCK_RAW, 299 .pr_domain = &inetdomain, 300 .pr_protocol = IPPROTO_IPV6, 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 #endif 308 { 309 .pr_type = SOCK_RAW, 310 .pr_domain = &inetdomain, 311 .pr_protocol = IPPROTO_PIM, 312 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 313 .pr_input = encap4_input, 314 .pr_ctloutput = rip_ctloutput, 315 .pr_usrreqs = &rip_usrreqs 316 }, 317 #ifdef DEV_PFSYNC 318 { 319 .pr_type = SOCK_RAW, 320 .pr_domain = &inetdomain, 321 .pr_protocol = IPPROTO_PFSYNC, 322 .pr_flags = PR_ATOMIC|PR_ADDR, 323 .pr_input = pfsync_input, 324 .pr_ctloutput = rip_ctloutput, 325 .pr_usrreqs = &rip_usrreqs 326 }, 327 #endif /* DEV_PFSYNC */ 328 #ifdef DEV_CARP 329 { 330 .pr_type = SOCK_RAW, 331 .pr_domain = &inetdomain, 332 .pr_protocol = IPPROTO_CARP, 333 .pr_flags = PR_ATOMIC|PR_ADDR, 334 .pr_input = carp_input, 335 .pr_output = (pr_output_t*)rip_output, 336 .pr_ctloutput = rip_ctloutput, 337 .pr_usrreqs = &rip_usrreqs 338 }, 339 #endif /* DEV_CARP */ 340 /* Spacer n-times for loadable protocols. */ 341 IPPROTOSPACER, 342 IPPROTOSPACER, 343 IPPROTOSPACER, 344 IPPROTOSPACER, 345 IPPROTOSPACER, 346 IPPROTOSPACER, 347 IPPROTOSPACER, 348 IPPROTOSPACER, 349 /* raw wildcard */ 350 { 351 .pr_type = SOCK_RAW, 352 .pr_domain = &inetdomain, 353 .pr_flags = PR_ATOMIC|PR_ADDR, 354 .pr_input = rip_input, 355 .pr_ctloutput = rip_ctloutput, 356 .pr_init = rip_init, 357 #ifdef VIMAGE 358 .pr_destroy = rip_destroy, 359 #endif 360 .pr_usrreqs = &rip_usrreqs 361 }, 362 }; 363 364 extern int in_inithead(void **, int); 365 extern int in_detachhead(void **, int); 366 367 struct domain inetdomain = { 368 .dom_family = AF_INET, 369 .dom_name = "internet", 370 .dom_protosw = inetsw, 371 .dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 372 #ifdef RADIX_MPATH 373 .dom_rtattach = rn4_mpath_inithead, 374 #else 375 .dom_rtattach = in_inithead, 376 #endif 377 #ifdef VIMAGE 378 .dom_rtdetach = in_detachhead, 379 #endif 380 .dom_rtoffset = 32, 381 .dom_maxrtkey = sizeof(struct sockaddr_in), 382 .dom_ifattach = in_domifattach, 383 .dom_ifdetach = in_domifdetach 384 }; 385 386 VNET_DOMAIN_SET(inet); 387 388 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 389 "Internet Family"); 390 391 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 392 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 393 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 394 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 395 #ifdef SCTP 396 SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP"); 397 #endif 398 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 399 #ifdef IPSEC 400 /* XXX no protocol # to use, pick something "reserved" */ 401 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 402 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 403 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 404 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 405 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 406 #endif /* IPSEC */ 407 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 408 #ifdef DEV_PFSYNC 409 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC"); 410 #endif 411 #ifdef DEV_CARP 412 SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 413 #endif 414