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/protosw.h> 50 #include <sys/queue.h> 51 #include <sys/sysctl.h> 52 53 #include <net/if.h> 54 #include <net/route.h> 55 #ifdef RADIX_MPATH 56 #include <net/radix_mpath.h> 57 #endif 58 59 #include <netinet/in.h> 60 #include <netinet/in_systm.h> 61 #include <netinet/ip.h> 62 #include <netinet/ip_var.h> 63 #include <netinet/ip_icmp.h> 64 #include <netinet/igmp_var.h> 65 #include <netinet/tcp.h> 66 #include <netinet/tcp_timer.h> 67 #include <netinet/tcp_var.h> 68 #include <netinet/udp.h> 69 #include <netinet/udp_var.h> 70 #include <netinet/ip_encap.h> 71 72 /* 73 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 74 */ 75 76 static struct pr_usrreqs nousrreqs; 77 78 #ifdef IPSEC 79 #include <netipsec/ipsec.h> 80 #endif /* IPSEC */ 81 82 #ifdef SCTP 83 #include <netinet/in_pcb.h> 84 #include <netinet/sctp_pcb.h> 85 #include <netinet/sctp.h> 86 #include <netinet/sctp_var.h> 87 #endif /* SCTP */ 88 89 #ifdef DEV_PFSYNC 90 #include <net/pfvar.h> 91 #include <net/if_pfsync.h> 92 #endif 93 94 #ifdef DEV_CARP 95 #include <netinet/ip_carp.h> 96 #endif 97 98 extern struct domain inetdomain; 99 100 /* Spacer for loadable protocols. */ 101 #define IPPROTOSPACER \ 102 { \ 103 .pr_domain = &inetdomain, \ 104 .pr_protocol = PROTO_SPACER, \ 105 .pr_usrreqs = &nousrreqs \ 106 } 107 108 struct protosw inetsw[] = { 109 { 110 .pr_type = 0, 111 .pr_domain = &inetdomain, 112 .pr_protocol = IPPROTO_IP, 113 .pr_init = ip_init, 114 .pr_slowtimo = ip_slowtimo, 115 .pr_drain = ip_drain, 116 .pr_usrreqs = &nousrreqs 117 }, 118 { 119 .pr_type = SOCK_DGRAM, 120 .pr_domain = &inetdomain, 121 .pr_protocol = IPPROTO_UDP, 122 .pr_flags = PR_ATOMIC|PR_ADDR, 123 .pr_input = udp_input, 124 .pr_ctlinput = udp_ctlinput, 125 .pr_ctloutput = ip_ctloutput, 126 .pr_init = udp_init, 127 .pr_usrreqs = &udp_usrreqs 128 }, 129 { 130 .pr_type = SOCK_STREAM, 131 .pr_domain = &inetdomain, 132 .pr_protocol = IPPROTO_TCP, 133 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 134 .pr_input = tcp_input, 135 .pr_ctlinput = tcp_ctlinput, 136 .pr_ctloutput = tcp_ctloutput, 137 .pr_init = tcp_init, 138 .pr_slowtimo = tcp_slowtimo, 139 .pr_drain = tcp_drain, 140 .pr_usrreqs = &tcp_usrreqs 141 }, 142 #ifdef SCTP 143 { 144 .pr_type = SOCK_DGRAM, 145 .pr_domain = &inetdomain, 146 .pr_protocol = IPPROTO_SCTP, 147 .pr_flags = PR_WANTRCVD, 148 .pr_input = sctp_input, 149 .pr_ctlinput = sctp_ctlinput, 150 .pr_ctloutput = sctp_ctloutput, 151 .pr_init = sctp_init, 152 .pr_drain = sctp_drain, 153 .pr_usrreqs = &sctp_usrreqs 154 }, 155 { 156 .pr_type = SOCK_SEQPACKET, 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_drain = sctp_drain, 164 .pr_usrreqs = &sctp_usrreqs 165 }, 166 167 { 168 .pr_type = SOCK_STREAM, 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 #endif /* SCTP */ 179 { 180 .pr_type = SOCK_RAW, 181 .pr_domain = &inetdomain, 182 .pr_protocol = IPPROTO_RAW, 183 .pr_flags = PR_ATOMIC|PR_ADDR, 184 .pr_input = rip_input, 185 .pr_ctlinput = rip_ctlinput, 186 .pr_ctloutput = rip_ctloutput, 187 .pr_usrreqs = &rip_usrreqs 188 }, 189 { 190 .pr_type = SOCK_RAW, 191 .pr_domain = &inetdomain, 192 .pr_protocol = IPPROTO_ICMP, 193 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 194 .pr_input = icmp_input, 195 .pr_ctloutput = rip_ctloutput, 196 .pr_init = icmp_init, 197 .pr_usrreqs = &rip_usrreqs 198 }, 199 { 200 .pr_type = SOCK_RAW, 201 .pr_domain = &inetdomain, 202 .pr_protocol = IPPROTO_IGMP, 203 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 204 .pr_input = igmp_input, 205 .pr_ctloutput = rip_ctloutput, 206 .pr_init = igmp_init, 207 .pr_fasttimo = igmp_fasttimo, 208 .pr_slowtimo = igmp_slowtimo, 209 .pr_usrreqs = &rip_usrreqs 210 }, 211 { 212 .pr_type = SOCK_RAW, 213 .pr_domain = &inetdomain, 214 .pr_protocol = IPPROTO_RSVP, 215 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 216 .pr_input = rsvp_input, 217 .pr_ctloutput = rip_ctloutput, 218 .pr_usrreqs = &rip_usrreqs 219 }, 220 #ifdef IPSEC 221 { 222 .pr_type = SOCK_RAW, 223 .pr_domain = &inetdomain, 224 .pr_protocol = IPPROTO_AH, 225 .pr_flags = PR_ATOMIC|PR_ADDR, 226 .pr_input = ah4_input, 227 .pr_ctlinput = ah4_ctlinput, 228 .pr_usrreqs = &nousrreqs 229 }, 230 { 231 .pr_type = SOCK_RAW, 232 .pr_domain = &inetdomain, 233 .pr_protocol = IPPROTO_ESP, 234 .pr_flags = PR_ATOMIC|PR_ADDR, 235 .pr_input = esp4_input, 236 .pr_ctlinput = esp4_ctlinput, 237 .pr_usrreqs = &nousrreqs 238 }, 239 { 240 .pr_type = SOCK_RAW, 241 .pr_domain = &inetdomain, 242 .pr_protocol = IPPROTO_IPCOMP, 243 .pr_flags = PR_ATOMIC|PR_ADDR, 244 .pr_input = ipcomp4_input, 245 .pr_usrreqs = &nousrreqs 246 }, 247 #endif /* IPSEC */ 248 { 249 .pr_type = SOCK_RAW, 250 .pr_domain = &inetdomain, 251 .pr_protocol = IPPROTO_IPV4, 252 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 253 .pr_input = encap4_input, 254 .pr_ctloutput = rip_ctloutput, 255 .pr_init = encap_init, 256 .pr_usrreqs = &rip_usrreqs 257 }, 258 { 259 .pr_type = SOCK_RAW, 260 .pr_domain = &inetdomain, 261 .pr_protocol = IPPROTO_MOBILE, 262 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 263 .pr_input = encap4_input, 264 .pr_ctloutput = rip_ctloutput, 265 .pr_init = encap_init, 266 .pr_usrreqs = &rip_usrreqs 267 }, 268 { 269 .pr_type = SOCK_RAW, 270 .pr_domain = &inetdomain, 271 .pr_protocol = IPPROTO_ETHERIP, 272 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 273 .pr_input = encap4_input, 274 .pr_ctloutput = rip_ctloutput, 275 .pr_init = encap_init, 276 .pr_usrreqs = &rip_usrreqs 277 }, 278 { 279 .pr_type = SOCK_RAW, 280 .pr_domain = &inetdomain, 281 .pr_protocol = IPPROTO_GRE, 282 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 283 .pr_input = encap4_input, 284 .pr_ctloutput = rip_ctloutput, 285 .pr_init = encap_init, 286 .pr_usrreqs = &rip_usrreqs 287 }, 288 # ifdef INET6 289 { 290 .pr_type = SOCK_RAW, 291 .pr_domain = &inetdomain, 292 .pr_protocol = IPPROTO_IPV6, 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 #endif 300 { 301 .pr_type = SOCK_RAW, 302 .pr_domain = &inetdomain, 303 .pr_protocol = IPPROTO_PIM, 304 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 305 .pr_input = encap4_input, 306 .pr_ctloutput = rip_ctloutput, 307 .pr_usrreqs = &rip_usrreqs 308 }, 309 #ifdef DEV_PFSYNC 310 { 311 .pr_type = SOCK_RAW, 312 .pr_domain = &inetdomain, 313 .pr_protocol = IPPROTO_PFSYNC, 314 .pr_flags = PR_ATOMIC|PR_ADDR, 315 .pr_input = pfsync_input, 316 .pr_ctloutput = rip_ctloutput, 317 .pr_usrreqs = &rip_usrreqs 318 }, 319 #endif /* DEV_PFSYNC */ 320 #ifdef DEV_CARP 321 { 322 .pr_type = SOCK_RAW, 323 .pr_domain = &inetdomain, 324 .pr_protocol = IPPROTO_CARP, 325 .pr_flags = PR_ATOMIC|PR_ADDR, 326 .pr_input = carp_input, 327 .pr_output = (pr_output_t*)rip_output, 328 .pr_ctloutput = rip_ctloutput, 329 .pr_usrreqs = &rip_usrreqs 330 }, 331 #endif /* DEV_CARP */ 332 /* Spacer n-times for loadable protocols. */ 333 IPPROTOSPACER, 334 IPPROTOSPACER, 335 IPPROTOSPACER, 336 IPPROTOSPACER, 337 IPPROTOSPACER, 338 IPPROTOSPACER, 339 IPPROTOSPACER, 340 IPPROTOSPACER, 341 /* raw wildcard */ 342 { 343 .pr_type = SOCK_RAW, 344 .pr_domain = &inetdomain, 345 .pr_flags = PR_ATOMIC|PR_ADDR, 346 .pr_input = rip_input, 347 .pr_ctloutput = rip_ctloutput, 348 .pr_init = rip_init, 349 .pr_usrreqs = &rip_usrreqs 350 }, 351 }; 352 353 extern int in_inithead(void **, int); 354 355 struct domain inetdomain = { 356 .dom_family = AF_INET, 357 .dom_name = "internet", 358 .dom_protosw = inetsw, 359 .dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 360 #ifdef RADIX_MPATH 361 .dom_rtattach = rn4_mpath_inithead, 362 #else 363 .dom_rtattach = in_inithead, 364 #endif 365 .dom_rtoffset = 32, 366 .dom_maxrtkey = sizeof(struct sockaddr_in) 367 }; 368 369 DOMAIN_SET(inet); 370 371 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 372 "Internet Family"); 373 374 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 375 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 376 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 377 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 378 #ifdef SCTP 379 SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP"); 380 #endif 381 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 382 #ifdef IPSEC 383 /* XXX no protocol # to use, pick something "reserved" */ 384 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 385 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 386 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 387 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 388 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 389 #endif /* IPSEC */ 390 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 391 #ifdef DEV_PFSYNC 392 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC"); 393 #endif 394 #ifdef DEV_CARP 395 SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 396 #endif 397