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 #ifdef VIMAGE 118 .pr_destroy = ip_destroy, 119 #endif 120 .pr_slowtimo = ip_slowtimo, 121 .pr_drain = ip_drain, 122 .pr_usrreqs = &nousrreqs 123 }, 124 { 125 .pr_type = SOCK_DGRAM, 126 .pr_domain = &inetdomain, 127 .pr_protocol = IPPROTO_UDP, 128 .pr_flags = PR_ATOMIC|PR_ADDR, 129 .pr_input = udp_input, 130 .pr_ctlinput = udp_ctlinput, 131 .pr_ctloutput = udp_ctloutput, 132 .pr_init = udp_init, 133 #ifdef VIMAGE 134 .pr_destroy = udp_destroy, 135 #endif 136 .pr_usrreqs = &udp_usrreqs 137 }, 138 { 139 .pr_type = SOCK_STREAM, 140 .pr_domain = &inetdomain, 141 .pr_protocol = IPPROTO_TCP, 142 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 143 .pr_input = tcp_input, 144 .pr_ctlinput = tcp_ctlinput, 145 .pr_ctloutput = tcp_ctloutput, 146 .pr_init = tcp_init, 147 #ifdef VIMAGE 148 .pr_destroy = tcp_destroy, 149 #endif 150 .pr_slowtimo = tcp_slowtimo, 151 .pr_drain = tcp_drain, 152 .pr_usrreqs = &tcp_usrreqs 153 }, 154 #ifdef SCTP 155 { 156 .pr_type = SOCK_DGRAM, 157 .pr_domain = &inetdomain, 158 .pr_protocol = IPPROTO_SCTP, 159 .pr_flags = PR_WANTRCVD, 160 .pr_input = sctp_input, 161 .pr_ctlinput = sctp_ctlinput, 162 .pr_ctloutput = sctp_ctloutput, 163 .pr_init = sctp_init, 164 #ifdef VIMAGE 165 .pr_destroy = sctp_finish, 166 #endif 167 .pr_drain = sctp_drain, 168 .pr_usrreqs = &sctp_usrreqs 169 }, 170 { 171 .pr_type = SOCK_SEQPACKET, 172 .pr_domain = &inetdomain, 173 .pr_protocol = IPPROTO_SCTP, 174 .pr_flags = PR_WANTRCVD, 175 .pr_input = sctp_input, 176 .pr_ctlinput = sctp_ctlinput, 177 .pr_ctloutput = sctp_ctloutput, 178 .pr_drain = sctp_drain, 179 .pr_usrreqs = &sctp_usrreqs 180 }, 181 182 { 183 .pr_type = SOCK_STREAM, 184 .pr_domain = &inetdomain, 185 .pr_protocol = IPPROTO_SCTP, 186 .pr_flags = PR_WANTRCVD, 187 .pr_input = sctp_input, 188 .pr_ctlinput = sctp_ctlinput, 189 .pr_ctloutput = sctp_ctloutput, 190 .pr_drain = sctp_drain, 191 .pr_usrreqs = &sctp_usrreqs 192 }, 193 #endif /* SCTP */ 194 { 195 .pr_type = SOCK_RAW, 196 .pr_domain = &inetdomain, 197 .pr_protocol = IPPROTO_RAW, 198 .pr_flags = PR_ATOMIC|PR_ADDR, 199 .pr_input = rip_input, 200 .pr_ctlinput = rip_ctlinput, 201 .pr_ctloutput = rip_ctloutput, 202 .pr_usrreqs = &rip_usrreqs 203 }, 204 { 205 .pr_type = SOCK_RAW, 206 .pr_domain = &inetdomain, 207 .pr_protocol = IPPROTO_ICMP, 208 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 209 .pr_input = icmp_input, 210 .pr_ctloutput = rip_ctloutput, 211 .pr_init = icmp_init, 212 .pr_usrreqs = &rip_usrreqs 213 }, 214 { 215 .pr_type = SOCK_RAW, 216 .pr_domain = &inetdomain, 217 .pr_protocol = IPPROTO_IGMP, 218 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 219 .pr_input = igmp_input, 220 .pr_ctloutput = rip_ctloutput, 221 .pr_fasttimo = igmp_fasttimo, 222 .pr_slowtimo = igmp_slowtimo, 223 .pr_usrreqs = &rip_usrreqs 224 }, 225 { 226 .pr_type = SOCK_RAW, 227 .pr_domain = &inetdomain, 228 .pr_protocol = IPPROTO_RSVP, 229 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 230 .pr_input = rsvp_input, 231 .pr_ctloutput = rip_ctloutput, 232 .pr_usrreqs = &rip_usrreqs 233 }, 234 #ifdef IPSEC 235 { 236 .pr_type = SOCK_RAW, 237 .pr_domain = &inetdomain, 238 .pr_protocol = IPPROTO_AH, 239 .pr_flags = PR_ATOMIC|PR_ADDR, 240 .pr_input = ah4_input, 241 .pr_ctlinput = ah4_ctlinput, 242 .pr_usrreqs = &nousrreqs 243 }, 244 { 245 .pr_type = SOCK_RAW, 246 .pr_domain = &inetdomain, 247 .pr_protocol = IPPROTO_ESP, 248 .pr_flags = PR_ATOMIC|PR_ADDR, 249 .pr_input = esp4_input, 250 .pr_ctlinput = esp4_ctlinput, 251 .pr_usrreqs = &nousrreqs 252 }, 253 { 254 .pr_type = SOCK_RAW, 255 .pr_domain = &inetdomain, 256 .pr_protocol = IPPROTO_IPCOMP, 257 .pr_flags = PR_ATOMIC|PR_ADDR, 258 .pr_input = ipcomp4_input, 259 .pr_usrreqs = &nousrreqs 260 }, 261 #endif /* IPSEC */ 262 { 263 .pr_type = SOCK_RAW, 264 .pr_domain = &inetdomain, 265 .pr_protocol = IPPROTO_IPV4, 266 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 267 .pr_input = encap4_input, 268 .pr_ctloutput = rip_ctloutput, 269 .pr_init = encap_init, 270 .pr_usrreqs = &rip_usrreqs 271 }, 272 { 273 .pr_type = SOCK_RAW, 274 .pr_domain = &inetdomain, 275 .pr_protocol = IPPROTO_MOBILE, 276 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 277 .pr_input = encap4_input, 278 .pr_ctloutput = rip_ctloutput, 279 .pr_init = encap_init, 280 .pr_usrreqs = &rip_usrreqs 281 }, 282 { 283 .pr_type = SOCK_RAW, 284 .pr_domain = &inetdomain, 285 .pr_protocol = IPPROTO_ETHERIP, 286 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 287 .pr_input = encap4_input, 288 .pr_ctloutput = rip_ctloutput, 289 .pr_init = encap_init, 290 .pr_usrreqs = &rip_usrreqs 291 }, 292 { 293 .pr_type = SOCK_RAW, 294 .pr_domain = &inetdomain, 295 .pr_protocol = IPPROTO_GRE, 296 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 297 .pr_input = encap4_input, 298 .pr_ctloutput = rip_ctloutput, 299 .pr_init = encap_init, 300 .pr_usrreqs = &rip_usrreqs 301 }, 302 # ifdef INET6 303 { 304 .pr_type = SOCK_RAW, 305 .pr_domain = &inetdomain, 306 .pr_protocol = IPPROTO_IPV6, 307 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 308 .pr_input = encap4_input, 309 .pr_ctloutput = rip_ctloutput, 310 .pr_init = encap_init, 311 .pr_usrreqs = &rip_usrreqs 312 }, 313 #endif 314 { 315 .pr_type = SOCK_RAW, 316 .pr_domain = &inetdomain, 317 .pr_protocol = IPPROTO_PIM, 318 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 319 .pr_input = encap4_input, 320 .pr_ctloutput = rip_ctloutput, 321 .pr_usrreqs = &rip_usrreqs 322 }, 323 #ifdef DEV_PFSYNC 324 { 325 .pr_type = SOCK_RAW, 326 .pr_domain = &inetdomain, 327 .pr_protocol = IPPROTO_PFSYNC, 328 .pr_flags = PR_ATOMIC|PR_ADDR, 329 .pr_input = pfsync_input, 330 .pr_ctloutput = rip_ctloutput, 331 .pr_usrreqs = &rip_usrreqs 332 }, 333 #endif /* DEV_PFSYNC */ 334 #ifdef DEV_CARP 335 { 336 .pr_type = SOCK_RAW, 337 .pr_domain = &inetdomain, 338 .pr_protocol = IPPROTO_CARP, 339 .pr_flags = PR_ATOMIC|PR_ADDR, 340 .pr_input = carp_input, 341 .pr_output = (pr_output_t*)rip_output, 342 .pr_ctloutput = rip_ctloutput, 343 .pr_usrreqs = &rip_usrreqs 344 }, 345 #endif /* DEV_CARP */ 346 /* Spacer n-times for loadable protocols. */ 347 IPPROTOSPACER, 348 IPPROTOSPACER, 349 IPPROTOSPACER, 350 IPPROTOSPACER, 351 IPPROTOSPACER, 352 IPPROTOSPACER, 353 IPPROTOSPACER, 354 IPPROTOSPACER, 355 /* raw wildcard */ 356 { 357 .pr_type = SOCK_RAW, 358 .pr_domain = &inetdomain, 359 .pr_flags = PR_ATOMIC|PR_ADDR, 360 .pr_input = rip_input, 361 .pr_ctloutput = rip_ctloutput, 362 .pr_init = rip_init, 363 #ifdef VIMAGE 364 .pr_destroy = rip_destroy, 365 #endif 366 .pr_usrreqs = &rip_usrreqs 367 }, 368 }; 369 370 extern int in_inithead(void **, int); 371 extern int in_detachhead(void **, int); 372 373 struct domain inetdomain = { 374 .dom_family = AF_INET, 375 .dom_name = "internet", 376 .dom_protosw = inetsw, 377 .dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 378 #ifdef RADIX_MPATH 379 .dom_rtattach = rn4_mpath_inithead, 380 #else 381 .dom_rtattach = in_inithead, 382 #endif 383 #ifdef VIMAGE 384 .dom_rtdetach = in_detachhead, 385 #endif 386 .dom_rtoffset = 32, 387 .dom_maxrtkey = sizeof(struct sockaddr_in), 388 .dom_ifattach = in_domifattach, 389 .dom_ifdetach = in_domifdetach 390 }; 391 392 VNET_DOMAIN_SET(inet); 393 394 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 395 "Internet Family"); 396 397 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 398 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 399 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 400 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 401 #ifdef SCTP 402 SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP"); 403 #endif 404 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 405 #ifdef IPSEC 406 /* XXX no protocol # to use, pick something "reserved" */ 407 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 408 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 409 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 410 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 411 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 412 #endif /* IPSEC */ 413 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 414 #ifdef DEV_PFSYNC 415 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC"); 416 #endif 417 #ifdef DEV_CARP 418 SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 419 #endif 420