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 #ifdef VIMAGE 162 .pr_destroy = sctp_finish, 163 #endif 164 .pr_drain = sctp_drain, 165 .pr_usrreqs = &sctp_usrreqs 166 }, 167 { 168 .pr_type = SOCK_SEQPACKET, 169 .pr_domain = &inetdomain, 170 .pr_protocol = IPPROTO_SCTP, 171 .pr_flags = PR_WANTRCVD, 172 .pr_input = sctp_input, 173 .pr_ctlinput = sctp_ctlinput, 174 .pr_ctloutput = sctp_ctloutput, 175 .pr_drain = sctp_drain, 176 .pr_usrreqs = &sctp_usrreqs 177 }, 178 179 { 180 .pr_type = SOCK_STREAM, 181 .pr_domain = &inetdomain, 182 .pr_protocol = IPPROTO_SCTP, 183 .pr_flags = PR_WANTRCVD, 184 .pr_input = sctp_input, 185 .pr_ctlinput = sctp_ctlinput, 186 .pr_ctloutput = sctp_ctloutput, 187 .pr_drain = sctp_drain, 188 .pr_usrreqs = &sctp_usrreqs 189 }, 190 #endif /* SCTP */ 191 { 192 .pr_type = SOCK_RAW, 193 .pr_domain = &inetdomain, 194 .pr_protocol = IPPROTO_RAW, 195 .pr_flags = PR_ATOMIC|PR_ADDR, 196 .pr_input = rip_input, 197 .pr_ctlinput = rip_ctlinput, 198 .pr_ctloutput = rip_ctloutput, 199 .pr_usrreqs = &rip_usrreqs 200 }, 201 { 202 .pr_type = SOCK_RAW, 203 .pr_domain = &inetdomain, 204 .pr_protocol = IPPROTO_ICMP, 205 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 206 .pr_input = icmp_input, 207 .pr_ctloutput = rip_ctloutput, 208 .pr_init = icmp_init, 209 .pr_usrreqs = &rip_usrreqs 210 }, 211 { 212 .pr_type = SOCK_RAW, 213 .pr_domain = &inetdomain, 214 .pr_protocol = IPPROTO_IGMP, 215 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 216 .pr_input = igmp_input, 217 .pr_ctloutput = rip_ctloutput, 218 .pr_fasttimo = igmp_fasttimo, 219 .pr_slowtimo = igmp_slowtimo, 220 .pr_usrreqs = &rip_usrreqs 221 }, 222 { 223 .pr_type = SOCK_RAW, 224 .pr_domain = &inetdomain, 225 .pr_protocol = IPPROTO_RSVP, 226 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 227 .pr_input = rsvp_input, 228 .pr_ctloutput = rip_ctloutput, 229 .pr_usrreqs = &rip_usrreqs 230 }, 231 #ifdef IPSEC 232 { 233 .pr_type = SOCK_RAW, 234 .pr_domain = &inetdomain, 235 .pr_protocol = IPPROTO_AH, 236 .pr_flags = PR_ATOMIC|PR_ADDR, 237 .pr_input = ah4_input, 238 .pr_ctlinput = ah4_ctlinput, 239 .pr_usrreqs = &nousrreqs 240 }, 241 { 242 .pr_type = SOCK_RAW, 243 .pr_domain = &inetdomain, 244 .pr_protocol = IPPROTO_ESP, 245 .pr_flags = PR_ATOMIC|PR_ADDR, 246 .pr_input = esp4_input, 247 .pr_ctlinput = esp4_ctlinput, 248 .pr_usrreqs = &nousrreqs 249 }, 250 { 251 .pr_type = SOCK_RAW, 252 .pr_domain = &inetdomain, 253 .pr_protocol = IPPROTO_IPCOMP, 254 .pr_flags = PR_ATOMIC|PR_ADDR, 255 .pr_input = ipcomp4_input, 256 .pr_usrreqs = &nousrreqs 257 }, 258 #endif /* IPSEC */ 259 { 260 .pr_type = SOCK_RAW, 261 .pr_domain = &inetdomain, 262 .pr_protocol = IPPROTO_IPV4, 263 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 264 .pr_input = encap4_input, 265 .pr_ctloutput = rip_ctloutput, 266 .pr_init = encap_init, 267 .pr_usrreqs = &rip_usrreqs 268 }, 269 { 270 .pr_type = SOCK_RAW, 271 .pr_domain = &inetdomain, 272 .pr_protocol = IPPROTO_MOBILE, 273 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 274 .pr_input = encap4_input, 275 .pr_ctloutput = rip_ctloutput, 276 .pr_init = encap_init, 277 .pr_usrreqs = &rip_usrreqs 278 }, 279 { 280 .pr_type = SOCK_RAW, 281 .pr_domain = &inetdomain, 282 .pr_protocol = IPPROTO_ETHERIP, 283 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 284 .pr_input = encap4_input, 285 .pr_ctloutput = rip_ctloutput, 286 .pr_init = encap_init, 287 .pr_usrreqs = &rip_usrreqs 288 }, 289 { 290 .pr_type = SOCK_RAW, 291 .pr_domain = &inetdomain, 292 .pr_protocol = IPPROTO_GRE, 293 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 294 .pr_input = encap4_input, 295 .pr_ctloutput = rip_ctloutput, 296 .pr_init = encap_init, 297 .pr_usrreqs = &rip_usrreqs 298 }, 299 # ifdef INET6 300 { 301 .pr_type = SOCK_RAW, 302 .pr_domain = &inetdomain, 303 .pr_protocol = IPPROTO_IPV6, 304 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 305 .pr_input = encap4_input, 306 .pr_ctloutput = rip_ctloutput, 307 .pr_init = encap_init, 308 .pr_usrreqs = &rip_usrreqs 309 }, 310 #endif 311 { 312 .pr_type = SOCK_RAW, 313 .pr_domain = &inetdomain, 314 .pr_protocol = IPPROTO_PIM, 315 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 316 .pr_input = encap4_input, 317 .pr_ctloutput = rip_ctloutput, 318 .pr_usrreqs = &rip_usrreqs 319 }, 320 #ifdef DEV_PFSYNC 321 { 322 .pr_type = SOCK_RAW, 323 .pr_domain = &inetdomain, 324 .pr_protocol = IPPROTO_PFSYNC, 325 .pr_flags = PR_ATOMIC|PR_ADDR, 326 .pr_input = pfsync_input, 327 .pr_ctloutput = rip_ctloutput, 328 .pr_usrreqs = &rip_usrreqs 329 }, 330 #endif /* DEV_PFSYNC */ 331 #ifdef DEV_CARP 332 { 333 .pr_type = SOCK_RAW, 334 .pr_domain = &inetdomain, 335 .pr_protocol = IPPROTO_CARP, 336 .pr_flags = PR_ATOMIC|PR_ADDR, 337 .pr_input = carp_input, 338 .pr_output = (pr_output_t*)rip_output, 339 .pr_ctloutput = rip_ctloutput, 340 .pr_usrreqs = &rip_usrreqs 341 }, 342 #endif /* DEV_CARP */ 343 /* Spacer n-times for loadable protocols. */ 344 IPPROTOSPACER, 345 IPPROTOSPACER, 346 IPPROTOSPACER, 347 IPPROTOSPACER, 348 IPPROTOSPACER, 349 IPPROTOSPACER, 350 IPPROTOSPACER, 351 IPPROTOSPACER, 352 /* raw wildcard */ 353 { 354 .pr_type = SOCK_RAW, 355 .pr_domain = &inetdomain, 356 .pr_flags = PR_ATOMIC|PR_ADDR, 357 .pr_input = rip_input, 358 .pr_ctloutput = rip_ctloutput, 359 .pr_init = rip_init, 360 #ifdef VIMAGE 361 .pr_destroy = rip_destroy, 362 #endif 363 .pr_usrreqs = &rip_usrreqs 364 }, 365 }; 366 367 extern int in_inithead(void **, int); 368 extern int in_detachhead(void **, int); 369 370 struct domain inetdomain = { 371 .dom_family = AF_INET, 372 .dom_name = "internet", 373 .dom_protosw = inetsw, 374 .dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 375 #ifdef RADIX_MPATH 376 .dom_rtattach = rn4_mpath_inithead, 377 #else 378 .dom_rtattach = in_inithead, 379 #endif 380 #ifdef VIMAGE 381 .dom_rtdetach = in_detachhead, 382 #endif 383 .dom_rtoffset = 32, 384 .dom_maxrtkey = sizeof(struct sockaddr_in), 385 .dom_ifattach = in_domifattach, 386 .dom_ifdetach = in_domifdetach 387 }; 388 389 VNET_DOMAIN_SET(inet); 390 391 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 392 "Internet Family"); 393 394 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 395 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 396 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 397 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 398 #ifdef SCTP 399 SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP"); 400 #endif 401 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 402 #ifdef IPSEC 403 /* XXX no protocol # to use, pick something "reserved" */ 404 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 405 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 406 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 407 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 408 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 409 #endif /* IPSEC */ 410 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 411 #ifdef DEV_PFSYNC 412 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC"); 413 #endif 414 #ifdef DEV_CARP 415 SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 416 #endif 417