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 * $FreeBSD$ 31 */ 32 33 #include "opt_ipx.h" 34 #include "opt_mrouting.h" 35 #include "opt_ipsec.h" 36 #include "opt_inet6.h" 37 #include "opt_pf.h" 38 #include "opt_carp.h" 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/socket.h> 44 #include <sys/domain.h> 45 #include <sys/protosw.h> 46 #include <sys/queue.h> 47 #include <sys/sysctl.h> 48 49 #include <net/if.h> 50 #include <net/route.h> 51 52 #include <netinet/in.h> 53 #include <netinet/in_systm.h> 54 #include <netinet/ip.h> 55 #include <netinet/ip_var.h> 56 #include <netinet/ip_icmp.h> 57 #include <netinet/igmp_var.h> 58 #ifdef PIM 59 #include <netinet/pim_var.h> 60 #endif 61 #include <netinet/tcp.h> 62 #include <netinet/tcp_timer.h> 63 #include <netinet/tcp_var.h> 64 #include <netinet/udp.h> 65 #include <netinet/udp_var.h> 66 #include <netinet/ip_encap.h> 67 68 /* 69 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 70 */ 71 72 static struct pr_usrreqs nousrreqs; 73 74 #ifdef IPSEC 75 #include <netinet6/ipsec.h> 76 #include <netinet6/ah.h> 77 #ifdef IPSEC_ESP 78 #include <netinet6/esp.h> 79 #endif 80 #include <netinet6/ipcomp.h> 81 #endif /* IPSEC */ 82 83 #ifdef FAST_IPSEC 84 #include <netipsec/ipsec.h> 85 #endif /* FAST_IPSEC */ 86 87 #ifdef IPXIP 88 #include <netipx/ipx_ip.h> 89 #endif 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 { 145 .pr_type = SOCK_RAW, 146 .pr_domain = &inetdomain, 147 .pr_protocol = IPPROTO_RAW, 148 .pr_flags = PR_ATOMIC|PR_ADDR, 149 .pr_input = rip_input, 150 .pr_ctlinput = rip_ctlinput, 151 .pr_ctloutput = rip_ctloutput, 152 .pr_usrreqs = &rip_usrreqs 153 }, 154 { 155 .pr_type = SOCK_RAW, 156 .pr_domain = &inetdomain, 157 .pr_protocol = IPPROTO_ICMP, 158 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 159 .pr_input = icmp_input, 160 .pr_ctloutput = rip_ctloutput, 161 .pr_usrreqs = &rip_usrreqs 162 }, 163 { 164 .pr_type = SOCK_RAW, 165 .pr_domain = &inetdomain, 166 .pr_protocol = IPPROTO_IGMP, 167 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 168 .pr_input = igmp_input, 169 .pr_ctloutput = rip_ctloutput, 170 .pr_init = igmp_init, 171 .pr_fasttimo = igmp_fasttimo, 172 .pr_slowtimo = igmp_slowtimo, 173 .pr_usrreqs = &rip_usrreqs 174 }, 175 { 176 .pr_type = SOCK_RAW, 177 .pr_domain = &inetdomain, 178 .pr_protocol = IPPROTO_RSVP, 179 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 180 .pr_input = rsvp_input, 181 .pr_ctloutput = rip_ctloutput, 182 .pr_usrreqs = &rip_usrreqs 183 }, 184 #ifdef IPSEC 185 { 186 .pr_type = SOCK_RAW, 187 .pr_domain = &inetdomain, 188 .pr_protocol = IPPROTO_AH, 189 .pr_flags = PR_ATOMIC|PR_ADDR, 190 .pr_input = ah4_input, 191 .pr_usrreqs = &nousrreqs 192 }, 193 #ifdef IPSEC_ESP 194 { 195 .pr_type = SOCK_RAW, 196 .pr_domain = &inetdomain, 197 .pr_protocol = IPPROTO_ESP, 198 .pr_flags = PR_ATOMIC|PR_ADDR, 199 .pr_input = esp4_input, 200 .pr_usrreqs = &nousrreqs 201 }, 202 #endif 203 { 204 .pr_type = SOCK_RAW, 205 .pr_domain = &inetdomain, 206 .pr_protocol = IPPROTO_IPCOMP, 207 .pr_flags = PR_ATOMIC|PR_ADDR, 208 .pr_input = ipcomp4_input, 209 .pr_usrreqs = &nousrreqs 210 }, 211 #endif /* IPSEC */ 212 #ifdef FAST_IPSEC 213 { 214 .pr_type = SOCK_RAW, 215 .pr_domain = &inetdomain, 216 .pr_protocol = IPPROTO_AH, 217 .pr_flags = PR_ATOMIC|PR_ADDR, 218 .pr_input = ah4_input, 219 .pr_ctlinput = ah4_ctlinput, 220 .pr_usrreqs = &nousrreqs 221 }, 222 { 223 .pr_type = SOCK_RAW, 224 .pr_domain = &inetdomain, 225 .pr_protocol = IPPROTO_ESP, 226 .pr_flags = PR_ATOMIC|PR_ADDR, 227 .pr_input = esp4_input, 228 .pr_ctlinput = esp4_ctlinput, 229 .pr_usrreqs = &nousrreqs 230 }, 231 { 232 .pr_type = SOCK_RAW, 233 .pr_domain = &inetdomain, 234 .pr_protocol = IPPROTO_IPCOMP, 235 .pr_flags = PR_ATOMIC|PR_ADDR, 236 .pr_input = ipcomp4_input, 237 .pr_usrreqs = &nousrreqs 238 }, 239 #endif /* FAST_IPSEC */ 240 { 241 .pr_type = SOCK_RAW, 242 .pr_domain = &inetdomain, 243 .pr_protocol = IPPROTO_IPV4, 244 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 245 .pr_input = encap4_input, 246 .pr_ctloutput = rip_ctloutput, 247 .pr_init = encap_init, 248 .pr_usrreqs = &rip_usrreqs 249 }, 250 { 251 .pr_type = SOCK_RAW, 252 .pr_domain = &inetdomain, 253 .pr_protocol = IPPROTO_MOBILE, 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_GRE, 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 # ifdef INET6 271 { 272 .pr_type = SOCK_RAW, 273 .pr_domain = &inetdomain, 274 .pr_protocol = IPPROTO_IPV6, 275 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 276 .pr_input = encap4_input, 277 .pr_ctloutput = rip_ctloutput, 278 .pr_init = encap_init, 279 .pr_usrreqs = &rip_usrreqs 280 }, 281 #endif 282 #ifdef IPXIP 283 { 284 .pr_type = SOCK_RAW, 285 .pr_domain = &inetdomain, 286 .pr_protocol = IPPROTO_IDP, 287 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 288 .pr_input = ipxip_input, 289 .pr_ctlinput = ipxip_ctlinput, 290 .pr_usrreqs = &rip_usrreqs 291 }, 292 #endif 293 #ifdef PIM 294 { 295 .pr_type = SOCK_RAW, 296 .pr_domain = &inetdomain, 297 .pr_protocol = IPPROTO_PIM, 298 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 299 .pr_input = pim_input, 300 .pr_ctloutput = rip_ctloutput, 301 .pr_usrreqs = &rip_usrreqs 302 }, 303 #endif /* PIM */ 304 #ifdef DEV_PFSYNC 305 { 306 .pr_type = SOCK_RAW, 307 .pr_domain = &inetdomain, 308 .pr_protocol = IPPROTO_PFSYNC, 309 .pr_flags = PR_ATOMIC|PR_ADDR, 310 .pr_input = pfsync_input, 311 .pr_ctloutput = rip_ctloutput, 312 .pr_usrreqs = &rip_usrreqs 313 }, 314 #endif /* DEV_PFSYNC */ 315 #ifdef DEV_CARP 316 { 317 .pr_type = SOCK_RAW, 318 .pr_domain = &inetdomain, 319 .pr_protocol = IPPROTO_CARP, 320 .pr_flags = PR_ATOMIC|PR_ADDR, 321 .pr_input = carp_input, 322 .pr_output = (pr_output_t*)rip_output, 323 .pr_ctloutput = rip_ctloutput, 324 .pr_usrreqs = &rip_usrreqs 325 }, 326 #endif /* DEV_CARP */ 327 /* Spacer n-times for loadable protocols. */ 328 IPPROTOSPACER, 329 IPPROTOSPACER, 330 IPPROTOSPACER, 331 IPPROTOSPACER, 332 IPPROTOSPACER, 333 IPPROTOSPACER, 334 IPPROTOSPACER, 335 IPPROTOSPACER, 336 /* raw wildcard */ 337 { 338 .pr_type = SOCK_RAW, 339 .pr_domain = &inetdomain, 340 .pr_flags = PR_ATOMIC|PR_ADDR, 341 .pr_input = rip_input, 342 .pr_ctloutput = rip_ctloutput, 343 .pr_init = rip_init, 344 .pr_usrreqs = &rip_usrreqs 345 }, 346 }; 347 348 extern int in_inithead(void **, int); 349 350 struct domain inetdomain = { 351 .dom_family = AF_INET, 352 .dom_name = "internet", 353 .dom_protosw = inetsw, 354 .dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 355 .dom_rtattach = in_inithead, 356 .dom_rtoffset = 32, 357 .dom_maxrtkey = sizeof(struct sockaddr_in) 358 }; 359 360 DOMAIN_SET(inet); 361 362 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 363 "Internet Family"); 364 365 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 366 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 367 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 368 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 369 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 370 #ifdef FAST_IPSEC 371 /* XXX no protocol # to use, pick something "reserved" */ 372 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 373 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 374 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 375 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 376 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 377 #else 378 #ifdef IPSEC 379 SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 380 #endif /* IPSEC */ 381 #endif /* !FAST_IPSEC */ 382 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 383 #ifdef PIM 384 SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 385 #endif 386 #ifdef DEV_PFSYNC 387 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC"); 388 #endif 389 #ifdef DEV_CARP 390 SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 391 #endif 392