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 60 #include <netinet/in.h> 61 #include <netinet/in_systm.h> 62 #include <netinet/in_var.h> 63 #include <netinet/ip.h> 64 #include <netinet/ip_var.h> 65 #include <netinet/ip_icmp.h> 66 #include <netinet/igmp_var.h> 67 #include <netinet/tcp.h> 68 #include <netinet/tcp_timer.h> 69 #include <netinet/tcp_var.h> 70 #include <netinet/udp.h> 71 #include <netinet/udp_var.h> 72 #include <netinet/ip_encap.h> 73 74 /* 75 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 76 */ 77 78 static struct pr_usrreqs nousrreqs; 79 80 #ifdef IPSEC 81 #include <netipsec/ipsec.h> 82 #endif /* IPSEC */ 83 84 #ifdef SCTP 85 #include <netinet/in_pcb.h> 86 #include <netinet/sctp_pcb.h> 87 #include <netinet/sctp.h> 88 #include <netinet/sctp_var.h> 89 #endif /* SCTP */ 90 91 #ifdef DEV_PFSYNC 92 #include <net/pfvar.h> 93 #include <net/if_pfsync.h> 94 #endif 95 96 #ifdef DEV_CARP 97 #include <netinet/ip_carp.h> 98 #endif 99 100 extern struct domain inetdomain; 101 102 /* Spacer for loadable protocols. */ 103 #define IPPROTOSPACER \ 104 { \ 105 .pr_domain = &inetdomain, \ 106 .pr_protocol = PROTO_SPACER, \ 107 .pr_usrreqs = &nousrreqs \ 108 } 109 110 struct protosw inetsw[] = { 111 { 112 .pr_type = 0, 113 .pr_domain = &inetdomain, 114 .pr_protocol = IPPROTO_IP, 115 .pr_init = ip_init, 116 .pr_slowtimo = ip_slowtimo, 117 .pr_drain = ip_drain, 118 .pr_usrreqs = &nousrreqs 119 }, 120 { 121 .pr_type = SOCK_DGRAM, 122 .pr_domain = &inetdomain, 123 .pr_protocol = IPPROTO_UDP, 124 .pr_flags = PR_ATOMIC|PR_ADDR, 125 .pr_input = udp_input, 126 .pr_ctlinput = udp_ctlinput, 127 .pr_ctloutput = ip_ctloutput, 128 .pr_init = udp_init, 129 .pr_usrreqs = &udp_usrreqs 130 }, 131 { 132 .pr_type = SOCK_STREAM, 133 .pr_domain = &inetdomain, 134 .pr_protocol = IPPROTO_TCP, 135 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 136 .pr_input = tcp_input, 137 .pr_ctlinput = tcp_ctlinput, 138 .pr_ctloutput = tcp_ctloutput, 139 .pr_init = tcp_init, 140 .pr_slowtimo = tcp_slowtimo, 141 .pr_drain = tcp_drain, 142 .pr_usrreqs = &tcp_usrreqs 143 }, 144 #ifdef SCTP 145 { 146 .pr_type = SOCK_DGRAM, 147 .pr_domain = &inetdomain, 148 .pr_protocol = IPPROTO_SCTP, 149 .pr_flags = PR_WANTRCVD, 150 .pr_input = sctp_input, 151 .pr_ctlinput = sctp_ctlinput, 152 .pr_ctloutput = sctp_ctloutput, 153 .pr_init = sctp_init, 154 .pr_drain = sctp_drain, 155 .pr_usrreqs = &sctp_usrreqs 156 }, 157 { 158 .pr_type = SOCK_SEQPACKET, 159 .pr_domain = &inetdomain, 160 .pr_protocol = IPPROTO_SCTP, 161 .pr_flags = PR_WANTRCVD, 162 .pr_input = sctp_input, 163 .pr_ctlinput = sctp_ctlinput, 164 .pr_ctloutput = sctp_ctloutput, 165 .pr_drain = sctp_drain, 166 .pr_usrreqs = &sctp_usrreqs 167 }, 168 169 { 170 .pr_type = SOCK_STREAM, 171 .pr_domain = &inetdomain, 172 .pr_protocol = IPPROTO_SCTP, 173 .pr_flags = PR_WANTRCVD, 174 .pr_input = sctp_input, 175 .pr_ctlinput = sctp_ctlinput, 176 .pr_ctloutput = sctp_ctloutput, 177 .pr_drain = sctp_drain, 178 .pr_usrreqs = &sctp_usrreqs 179 }, 180 #endif /* SCTP */ 181 { 182 .pr_type = SOCK_RAW, 183 .pr_domain = &inetdomain, 184 .pr_protocol = IPPROTO_RAW, 185 .pr_flags = PR_ATOMIC|PR_ADDR, 186 .pr_input = rip_input, 187 .pr_ctlinput = rip_ctlinput, 188 .pr_ctloutput = rip_ctloutput, 189 .pr_usrreqs = &rip_usrreqs 190 }, 191 { 192 .pr_type = SOCK_RAW, 193 .pr_domain = &inetdomain, 194 .pr_protocol = IPPROTO_ICMP, 195 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 196 .pr_input = icmp_input, 197 .pr_ctloutput = rip_ctloutput, 198 .pr_init = icmp_init, 199 .pr_usrreqs = &rip_usrreqs 200 }, 201 { 202 .pr_type = SOCK_RAW, 203 .pr_domain = &inetdomain, 204 .pr_protocol = IPPROTO_IGMP, 205 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 206 .pr_input = igmp_input, 207 .pr_ctloutput = rip_ctloutput, 208 .pr_init = igmp_init, 209 .pr_fasttimo = igmp_fasttimo, 210 .pr_slowtimo = igmp_slowtimo, 211 .pr_usrreqs = &rip_usrreqs 212 }, 213 { 214 .pr_type = SOCK_RAW, 215 .pr_domain = &inetdomain, 216 .pr_protocol = IPPROTO_RSVP, 217 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 218 .pr_input = rsvp_input, 219 .pr_ctloutput = rip_ctloutput, 220 .pr_usrreqs = &rip_usrreqs 221 }, 222 #ifdef IPSEC 223 { 224 .pr_type = SOCK_RAW, 225 .pr_domain = &inetdomain, 226 .pr_protocol = IPPROTO_AH, 227 .pr_flags = PR_ATOMIC|PR_ADDR, 228 .pr_input = ah4_input, 229 .pr_ctlinput = ah4_ctlinput, 230 .pr_usrreqs = &nousrreqs 231 }, 232 { 233 .pr_type = SOCK_RAW, 234 .pr_domain = &inetdomain, 235 .pr_protocol = IPPROTO_ESP, 236 .pr_flags = PR_ATOMIC|PR_ADDR, 237 .pr_input = esp4_input, 238 .pr_ctlinput = esp4_ctlinput, 239 .pr_usrreqs = &nousrreqs 240 }, 241 { 242 .pr_type = SOCK_RAW, 243 .pr_domain = &inetdomain, 244 .pr_protocol = IPPROTO_IPCOMP, 245 .pr_flags = PR_ATOMIC|PR_ADDR, 246 .pr_input = ipcomp4_input, 247 .pr_usrreqs = &nousrreqs 248 }, 249 #endif /* IPSEC */ 250 { 251 .pr_type = SOCK_RAW, 252 .pr_domain = &inetdomain, 253 .pr_protocol = IPPROTO_IPV4, 254 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 255 .pr_input = encap4_input, 256 .pr_ctloutput = rip_ctloutput, 257 .pr_init = encap_init, 258 .pr_usrreqs = &rip_usrreqs 259 }, 260 { 261 .pr_type = SOCK_RAW, 262 .pr_domain = &inetdomain, 263 .pr_protocol = IPPROTO_MOBILE, 264 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 265 .pr_input = encap4_input, 266 .pr_ctloutput = rip_ctloutput, 267 .pr_init = encap_init, 268 .pr_usrreqs = &rip_usrreqs 269 }, 270 { 271 .pr_type = SOCK_RAW, 272 .pr_domain = &inetdomain, 273 .pr_protocol = IPPROTO_ETHERIP, 274 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 275 .pr_input = encap4_input, 276 .pr_ctloutput = rip_ctloutput, 277 .pr_init = encap_init, 278 .pr_usrreqs = &rip_usrreqs 279 }, 280 { 281 .pr_type = SOCK_RAW, 282 .pr_domain = &inetdomain, 283 .pr_protocol = IPPROTO_GRE, 284 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 285 .pr_input = encap4_input, 286 .pr_ctloutput = rip_ctloutput, 287 .pr_init = encap_init, 288 .pr_usrreqs = &rip_usrreqs 289 }, 290 # ifdef INET6 291 { 292 .pr_type = SOCK_RAW, 293 .pr_domain = &inetdomain, 294 .pr_protocol = IPPROTO_IPV6, 295 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 296 .pr_input = encap4_input, 297 .pr_ctloutput = rip_ctloutput, 298 .pr_init = encap_init, 299 .pr_usrreqs = &rip_usrreqs 300 }, 301 #endif 302 { 303 .pr_type = SOCK_RAW, 304 .pr_domain = &inetdomain, 305 .pr_protocol = IPPROTO_PIM, 306 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 307 .pr_input = encap4_input, 308 .pr_ctloutput = rip_ctloutput, 309 .pr_usrreqs = &rip_usrreqs 310 }, 311 #ifdef DEV_PFSYNC 312 { 313 .pr_type = SOCK_RAW, 314 .pr_domain = &inetdomain, 315 .pr_protocol = IPPROTO_PFSYNC, 316 .pr_flags = PR_ATOMIC|PR_ADDR, 317 .pr_input = pfsync_input, 318 .pr_ctloutput = rip_ctloutput, 319 .pr_usrreqs = &rip_usrreqs 320 }, 321 #endif /* DEV_PFSYNC */ 322 #ifdef DEV_CARP 323 { 324 .pr_type = SOCK_RAW, 325 .pr_domain = &inetdomain, 326 .pr_protocol = IPPROTO_CARP, 327 .pr_flags = PR_ATOMIC|PR_ADDR, 328 .pr_input = carp_input, 329 .pr_output = (pr_output_t*)rip_output, 330 .pr_ctloutput = rip_ctloutput, 331 .pr_usrreqs = &rip_usrreqs 332 }, 333 #endif /* DEV_CARP */ 334 /* Spacer n-times for loadable protocols. */ 335 IPPROTOSPACER, 336 IPPROTOSPACER, 337 IPPROTOSPACER, 338 IPPROTOSPACER, 339 IPPROTOSPACER, 340 IPPROTOSPACER, 341 IPPROTOSPACER, 342 IPPROTOSPACER, 343 /* raw wildcard */ 344 { 345 .pr_type = SOCK_RAW, 346 .pr_domain = &inetdomain, 347 .pr_flags = PR_ATOMIC|PR_ADDR, 348 .pr_input = rip_input, 349 .pr_ctloutput = rip_ctloutput, 350 .pr_init = rip_init, 351 .pr_usrreqs = &rip_usrreqs 352 }, 353 }; 354 355 extern int in_inithead(void **, int); 356 357 struct domain inetdomain = { 358 .dom_family = AF_INET, 359 .dom_name = "internet", 360 .dom_protosw = inetsw, 361 .dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 362 #ifdef RADIX_MPATH 363 .dom_rtattach = rn4_mpath_inithead, 364 #else 365 .dom_rtattach = in_inithead, 366 #endif 367 .dom_rtoffset = 32, 368 .dom_maxrtkey = sizeof(struct sockaddr_in), 369 .dom_ifattach = in_domifattach, 370 .dom_ifdetach = in_domifdetach 371 }; 372 373 DOMAIN_SET(inet); 374 375 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 376 "Internet Family"); 377 378 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 379 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 380 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 381 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 382 #ifdef SCTP 383 SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP"); 384 #endif 385 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 386 #ifdef IPSEC 387 /* XXX no protocol # to use, pick something "reserved" */ 388 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 389 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 390 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 391 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 392 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 393 #endif /* IPSEC */ 394 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 395 #ifdef DEV_PFSYNC 396 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC"); 397 #endif 398 #ifdef DEV_CARP 399 SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 400 #endif 401