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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)in_proto.c 8.2 (Berkeley) 2/9/95 34 * $FreeBSD: src/sys/netinet/in_proto.c,v 1.53.2.7 2003/08/24 08:24:38 hsu Exp $ 35 * $DragonFly: src/sys/netinet/in_proto.c,v 1.14 2007/08/16 20:03:57 dillon Exp $ 36 */ 37 38 #include "opt_ipdivert.h" 39 #include "opt_ipx.h" 40 #include "opt_mrouting.h" 41 #include "opt_ipsec.h" 42 #include "opt_inet6.h" 43 #include "opt_sctp.h" 44 #include "opt_carp.h" 45 46 #include <sys/param.h> 47 #include <sys/kernel.h> 48 #include <sys/socket.h> 49 #include <sys/domain.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 57 #include <netinet/in.h> 58 #include <netinet/in_systm.h> 59 #include <netinet/ip.h> 60 #include <netinet/ip_var.h> 61 #include <netinet/ip_icmp.h> 62 #include <netinet/igmp_var.h> 63 #ifdef PIM 64 #include <netinet/pim_var.h> 65 #endif 66 #include <netinet/tcp.h> 67 #include <netinet/tcp_timer.h> 68 #include <netinet/tcp_var.h> 69 #include <netinet/udp.h> 70 #include <netinet/udp_var.h> 71 #include <netinet/ip_encap.h> 72 73 74 /* 75 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 76 */ 77 78 #ifdef IPSEC 79 #include <netinet6/ipsec.h> 80 #include <netinet6/ah.h> 81 #ifdef IPSEC_ESP 82 #include <netinet6/esp.h> 83 #endif 84 #include <netinet6/ipcomp.h> 85 #endif /* IPSEC */ 86 87 #ifdef FAST_IPSEC 88 #include <netproto/ipsec/ipsec.h> 89 #endif /* FAST_IPSEC */ 90 91 #ifdef IPXIP 92 #include <netproto/ipx/ipx_ip.h> 93 #endif 94 95 #ifdef NSIP 96 #include <netns/ns.h> 97 #include <netns/ns_if.h> 98 #endif 99 100 #ifdef SCTP 101 #include <netinet/in_pcb.h> 102 #include <netinet/sctp_pcb.h> 103 #include <netinet/sctp.h> 104 #include <netinet/sctp_var.h> 105 #endif /* SCTP */ 106 107 #include <net/netisr.h> /* for cpu0_soport */ 108 109 #ifdef CARP 110 #include <netinet/ip_carp.h> 111 #endif 112 113 extern struct domain inetdomain; 114 static struct pr_usrreqs nousrreqs; 115 116 struct protosw inetsw[] = { 117 { 0, &inetdomain, 0, 0, 118 0, 0, 0, 0, 119 cpu0_soport, 120 ip_init, 0, ip_slowtimo, ip_drain, 121 &nousrreqs 122 }, 123 { SOCK_DGRAM, &inetdomain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 124 udp_input, 0, udp_ctlinput, ip_ctloutput, 125 udp_soport, 126 udp_init, 0, 0, 0, 127 &udp_usrreqs 128 }, 129 { SOCK_STREAM, &inetdomain, IPPROTO_TCP, 130 PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 131 tcp_input, 0, tcp_ctlinput, tcp_ctloutput, 132 tcp_soport, 133 tcp_init, 0, tcp_slowtimo, tcp_drain, 134 &tcp_usrreqs 135 }, 136 #ifdef SCTP 137 /* 138 * Order is very important here, we add the good one in 139 * in this postion so it maps to the right ip_protox[] 140 * postion for SCTP. Don't move the one above below 141 * this one or IPv6/4 compatability will break 142 */ 143 { SOCK_DGRAM, &inetdomain, IPPROTO_SCTP, PR_ADDR_OPT|PR_WANTRCVD, 144 sctp_input, 0, sctp_ctlinput, sctp_ctloutput, 145 cpu0_soport, 146 sctp_init, 0, 0, sctp_drain, 147 &sctp_usrreqs 148 }, 149 { SOCK_SEQPACKET,&inetdomain, IPPROTO_SCTP, PR_ADDR_OPT|PR_WANTRCVD, 150 sctp_input, 0, sctp_ctlinput, sctp_ctloutput, 151 cpu0_soport, 152 0, 0, 0, sctp_drain, 153 &sctp_usrreqs 154 }, 155 156 { SOCK_STREAM, &inetdomain, IPPROTO_SCTP, PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD, 157 sctp_input, 0, sctp_ctlinput, sctp_ctloutput, 158 cpu0_soport, 159 0, 0, 0, sctp_drain, 160 &sctp_usrreqs 161 }, 162 #endif /* SCTP */ 163 { SOCK_RAW, &inetdomain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 164 rip_input, 0, rip_ctlinput, rip_ctloutput, 165 cpu0_soport, 166 0, 0, 0, 0, 167 &rip_usrreqs 168 }, 169 { SOCK_RAW, &inetdomain, IPPROTO_ICMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 170 icmp_input, 0, 0, rip_ctloutput, 171 cpu0_soport, 172 0, 0, 0, 0, 173 &rip_usrreqs 174 }, 175 { SOCK_RAW, &inetdomain, IPPROTO_IGMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 176 igmp_input, 0, 0, rip_ctloutput, 177 cpu0_soport, 178 igmp_init, igmp_fasttimo, igmp_slowtimo, 0, 179 &rip_usrreqs 180 }, 181 { SOCK_RAW, &inetdomain, IPPROTO_RSVP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 182 rsvp_input, 0, 0, rip_ctloutput, 183 cpu0_soport, 184 0, 0, 0, 0, 185 &rip_usrreqs 186 }, 187 #ifdef IPSEC 188 { SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 189 ah4_input, 0, 0, 0, 190 cpu0_soport, 191 0, 0, 0, 0, 192 &nousrreqs 193 }, 194 #ifdef IPSEC_ESP 195 { SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 196 esp4_input, 0, 0, 0, 197 cpu0_soport, 198 0, 0, 0, 0, 199 &nousrreqs 200 }, 201 #endif 202 { SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 203 ipcomp4_input, 0, 0, 0, 204 cpu0_soport, 205 0, 0, 0, 0, 206 &nousrreqs 207 }, 208 #endif /* IPSEC */ 209 #ifdef FAST_IPSEC 210 { SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 211 ipsec4_common_input, 0, 0, 0, 212 cpu0_soport, 213 0, 0, 0, 0, 214 &nousrreqs 215 }, 216 { SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 217 ipsec4_common_input, 0, 0, 0, 218 cpu0_soport, 219 0, 0, 0, 0, 220 &nousrreqs 221 }, 222 { SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 223 ipsec4_common_input, 0, 0, 0, 224 cpu0_soport, 225 0, 0, 0, 0, 226 &nousrreqs 227 }, 228 #endif /* FAST_IPSEC */ 229 { SOCK_RAW, &inetdomain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 230 encap4_input, 0, 0, rip_ctloutput, 231 cpu0_soport, 232 encap_init, 0, 0, 0, 233 &rip_usrreqs 234 }, 235 { SOCK_RAW, &inetdomain, IPPROTO_MOBILE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 236 encap4_input, 0, 0, rip_ctloutput, 237 cpu0_soport, 238 encap_init, 0, 0, 0, 239 &rip_usrreqs 240 }, 241 { SOCK_RAW, &inetdomain, IPPROTO_GRE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 242 encap4_input, 0, 0, rip_ctloutput, 243 cpu0_soport, 244 encap_init, 0, 0, 0, 245 &rip_usrreqs 246 }, 247 # ifdef INET6 248 { SOCK_RAW, &inetdomain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 249 encap4_input, 0, 0, rip_ctloutput, 250 cpu0_soport, 251 encap_init, 0, 0, 0, 252 &rip_usrreqs 253 }, 254 #endif 255 #ifdef IPDIVERT 256 { SOCK_RAW, &inetdomain, IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR, 257 div_input, 0, 0, ip_ctloutput, 258 cpu0_soport, 259 div_init, 0, 0, 0, 260 &div_usrreqs, 261 }, 262 #endif 263 #ifdef IPXIP 264 { SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 265 ipxip_input, 0, ipxip_ctlinput, 0, 266 cpu0_soport, 267 0, 0, 0, 0, 268 &rip_usrreqs 269 }, 270 #endif 271 #ifdef NSIP 272 { SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 273 idpip_input, 0, nsip_ctlinput, 0, 274 cpu0_soport, 275 0, 0, 0, 0, 276 &rip_usrreqs 277 }, 278 #endif 279 #ifdef PIM 280 { SOCK_RAW, &inetdomain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 281 pim_input, 0, 0, rip_ctloutput, 282 cpu0_soport, 283 0, 0, 0, 0, 284 &rip_usrreqs 285 }, 286 #endif 287 #ifdef NPFSYNC 288 { SOCK_RAW, &inetdomain, IPPROTO_PFSYNC, PR_ATOMIC|PR_ADDR, 289 pfsync_input, 0, 0, rip_ctloutput, 290 0, 291 0, 0, 0, 0, 292 &rip_usrreqs 293 }, 294 #endif /* NPFSYNC */ 295 /* raw wildcard */ 296 { SOCK_RAW, &inetdomain, 0, PR_ATOMIC|PR_ADDR, 297 rip_input, 0, 0, rip_ctloutput, 298 cpu0_soport, 299 rip_init, 0, 0, 0, 300 &rip_usrreqs 301 }, 302 303 #ifdef CARP 304 { SOCK_RAW, &inetdomain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR, 305 carp_input, rip_output, 0, rip_ctloutput, 306 0, 307 0, 0, 0, 0, 308 &rip_usrreqs 309 }, 310 311 #endif 312 }; 313 314 struct domain inetdomain = { 315 AF_INET, "internet", NULL, NULL, NULL, 316 inetsw, &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 317 SLIST_ENTRY_INITIALIZER, 318 in_inithead, 32, sizeof(struct sockaddr_in), 319 }; 320 321 DOMAIN_SET(inet); 322 323 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 324 "Internet Family"); 325 326 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 327 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 328 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 329 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 330 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 331 #ifdef FAST_IPSEC 332 /* XXX no protocol # to use, pick something "reserved" */ 333 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 334 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 335 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 336 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 337 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 338 #else 339 #ifdef IPSEC 340 SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 341 #endif /* IPSEC */ 342 #endif /* !FAST_IPSEC */ 343 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 344 #ifdef IPDIVERT 345 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT, divert, CTLFLAG_RW, 0, "DIVERT"); 346 #endif 347 #ifdef PIM 348 SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 349 #endif 350 #ifdef CARP 351 SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 352 #endif 353