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 1.17 2008/10/27 02:56:30 sephe 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 #ifdef IPDIVERT 73 #include <netinet/ip_divert.h> 74 #endif 75 76 /* 77 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 78 */ 79 80 #ifdef IPSEC 81 #include <netinet6/ipsec.h> 82 #include <netinet6/ah.h> 83 #ifdef IPSEC_ESP 84 #include <netinet6/esp.h> 85 #endif 86 #include <netinet6/ipcomp.h> 87 #endif /* IPSEC */ 88 89 #ifdef FAST_IPSEC 90 #include <netproto/ipsec/ipsec.h> 91 #endif /* FAST_IPSEC */ 92 93 #ifdef IPXIP 94 #include <netproto/ipx/ipx_ip.h> 95 #endif 96 97 #ifdef NSIP 98 #include <netns/ns.h> 99 #include <netns/ns_if.h> 100 #endif 101 102 #ifdef SCTP 103 #include <netinet/in_pcb.h> 104 #include <netinet/sctp_pcb.h> 105 #include <netinet/sctp.h> 106 #include <netinet/sctp_var.h> 107 #endif /* SCTP */ 108 109 #include <net/netisr.h> /* for cpu0_soport */ 110 111 #ifdef CARP 112 #include <netinet/ip_carp.h> 113 #endif 114 115 extern struct domain inetdomain; 116 static struct pr_usrreqs nousrreqs; 117 118 struct protosw inetsw[] = { 119 { 0, &inetdomain, 0, 0, 120 0, 0, 0, 0, 121 cpu0_soport, NULL, 122 ip_init, 0, ip_slowtimo, ip_drain, 123 &nousrreqs 124 }, 125 { SOCK_DGRAM, &inetdomain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 126 udp_input, 0, udp_ctlinput, ip_ctloutput, 127 udp_soport, udp_ctlport, 128 udp_init, 0, 0, 0, 129 &udp_usrreqs 130 }, 131 { SOCK_STREAM, &inetdomain, IPPROTO_TCP, 132 PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 133 tcp_input, 0, tcp_ctlinput, tcp_ctloutput, 134 tcp_soport, tcp_ctlport, 135 tcp_init, 0, tcp_slowtimo, tcp_drain, 136 &tcp_usrreqs 137 }, 138 #ifdef SCTP 139 /* 140 * Order is very important here, we add the good one in 141 * in this postion so it maps to the right ip_protox[] 142 * postion for SCTP. Don't move the one above below 143 * this one or IPv6/4 compatability will break 144 */ 145 { SOCK_DGRAM, &inetdomain, IPPROTO_SCTP, PR_ADDR_OPT|PR_WANTRCVD, 146 sctp_input, 0, sctp_ctlinput, sctp_ctloutput, 147 cpu0_soport, cpu0_ctlport, 148 sctp_init, 0, 0, sctp_drain, 149 &sctp_usrreqs 150 }, 151 { SOCK_SEQPACKET,&inetdomain, IPPROTO_SCTP, PR_ADDR_OPT|PR_WANTRCVD, 152 sctp_input, 0, sctp_ctlinput, sctp_ctloutput, 153 cpu0_soport, cpu0_ctlport, 154 0, 0, 0, sctp_drain, 155 &sctp_usrreqs 156 }, 157 158 { SOCK_STREAM, &inetdomain, IPPROTO_SCTP, PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD, 159 sctp_input, 0, sctp_ctlinput, sctp_ctloutput, 160 cpu0_soport, cpu0_ctlport, 161 0, 0, 0, sctp_drain, 162 &sctp_usrreqs 163 }, 164 #endif /* SCTP */ 165 { SOCK_RAW, &inetdomain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 166 rip_input, 0, rip_ctlinput, rip_ctloutput, 167 cpu0_soport, cpu0_ctlport, 168 0, 0, 0, 0, 169 &rip_usrreqs 170 }, 171 { SOCK_RAW, &inetdomain, IPPROTO_ICMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 172 icmp_input, 0, 0, rip_ctloutput, 173 cpu0_soport, NULL, 174 0, 0, 0, 0, 175 &rip_usrreqs 176 }, 177 { SOCK_RAW, &inetdomain, IPPROTO_IGMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 178 igmp_input, 0, 0, rip_ctloutput, 179 cpu0_soport, NULL, 180 igmp_init, igmp_fasttimo, igmp_slowtimo, 0, 181 &rip_usrreqs 182 }, 183 { SOCK_RAW, &inetdomain, IPPROTO_RSVP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 184 rsvp_input, 0, 0, rip_ctloutput, 185 cpu0_soport, NULL, 186 0, 0, 0, 0, 187 &rip_usrreqs 188 }, 189 #ifdef IPSEC 190 { SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 191 ah4_input, 0, 0, 0, 192 cpu0_soport, NULL, 193 0, 0, 0, 0, 194 &nousrreqs 195 }, 196 #ifdef IPSEC_ESP 197 { SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 198 esp4_input, 0, 0, 0, 199 cpu0_soport, NULL, 200 0, 0, 0, 0, 201 &nousrreqs 202 }, 203 #endif 204 { SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 205 ipcomp4_input, 0, 0, 0, 206 cpu0_soport, NULL, 207 0, 0, 0, 0, 208 &nousrreqs 209 }, 210 #endif /* IPSEC */ 211 #ifdef FAST_IPSEC 212 { SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 213 ipsec4_common_input, 0, 0, 0, 214 cpu0_soport, NULL, 215 0, 0, 0, 0, 216 &nousrreqs 217 }, 218 { SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 219 ipsec4_common_input, 0, 0, 0, 220 cpu0_soport, NULL, 221 0, 0, 0, 0, 222 &nousrreqs 223 }, 224 { SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 225 ipsec4_common_input, 0, 0, 0, 226 cpu0_soport, NULL, 227 0, 0, 0, 0, 228 &nousrreqs 229 }, 230 #endif /* FAST_IPSEC */ 231 { SOCK_RAW, &inetdomain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 232 encap4_input, 0, 0, rip_ctloutput, 233 cpu0_soport, NULL, 234 encap_init, 0, 0, 0, 235 &rip_usrreqs 236 }, 237 { SOCK_RAW, &inetdomain, IPPROTO_MOBILE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 238 encap4_input, 0, 0, rip_ctloutput, 239 cpu0_soport, NULL, 240 encap_init, 0, 0, 0, 241 &rip_usrreqs 242 }, 243 { SOCK_RAW, &inetdomain, IPPROTO_GRE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 244 encap4_input, 0, 0, rip_ctloutput, 245 cpu0_soport, NULL, 246 encap_init, 0, 0, 0, 247 &rip_usrreqs 248 }, 249 # ifdef INET6 250 { SOCK_RAW, &inetdomain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 251 encap4_input, 0, 0, rip_ctloutput, 252 cpu0_soport, NULL, 253 encap_init, 0, 0, 0, 254 &rip_usrreqs 255 }, 256 #endif 257 #ifdef IPDIVERT 258 { SOCK_RAW, &inetdomain, IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR, 259 div_input, 0, 0, ip_ctloutput, 260 div_soport, NULL, 261 div_init, 0, 0, 0, 262 &div_usrreqs, 263 }, 264 #endif 265 #ifdef IPXIP 266 { SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 267 ipxip_input, 0, ipxip_ctlinput, 0, 268 cpu0_soport, cpu0_ctlport, 269 0, 0, 0, 0, 270 &rip_usrreqs 271 }, 272 #endif 273 #ifdef NSIP 274 { SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 275 idpip_input, 0, nsip_ctlinput, 0, 276 cpu0_soport, cpu0_ctlport, 277 0, 0, 0, 0, 278 &rip_usrreqs 279 }, 280 #endif 281 #ifdef PIM 282 { SOCK_RAW, &inetdomain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 283 pim_input, 0, 0, rip_ctloutput, 284 cpu0_soport, NULL, 285 0, 0, 0, 0, 286 &rip_usrreqs 287 }, 288 #endif 289 #ifdef NPFSYNC 290 { SOCK_RAW, &inetdomain, IPPROTO_PFSYNC, PR_ATOMIC|PR_ADDR, 291 pfsync_input, 0, 0, rip_ctloutput, 292 cpu0_soport, NULL, 293 0, 0, 0, 0, 294 &rip_usrreqs 295 }, 296 #endif /* NPFSYNC */ 297 /* raw wildcard */ 298 { SOCK_RAW, &inetdomain, 0, PR_ATOMIC|PR_ADDR, 299 rip_input, 0, 0, rip_ctloutput, 300 cpu0_soport, NULL, 301 rip_init, 0, 0, 0, 302 &rip_usrreqs 303 }, 304 305 #ifdef CARP 306 { SOCK_RAW, &inetdomain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR, 307 carp_input, rip_output, 0, rip_ctloutput, 308 cpu0_soport, NULL, 309 0, 0, 0, 0, 310 &rip_usrreqs 311 }, 312 313 #endif 314 }; 315 316 struct domain inetdomain = { 317 AF_INET, "internet", NULL, NULL, NULL, 318 inetsw, &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 319 SLIST_ENTRY_INITIALIZER, 320 in_inithead, 32, sizeof(struct sockaddr_in), 321 }; 322 323 DOMAIN_SET(inet); 324 325 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 326 "Internet Family"); 327 328 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 329 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 330 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 331 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 332 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 333 #ifdef FAST_IPSEC 334 /* XXX no protocol # to use, pick something "reserved" */ 335 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 336 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 337 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 338 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 339 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 340 #else 341 #ifdef IPSEC 342 SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 343 #endif /* IPSEC */ 344 #endif /* !FAST_IPSEC */ 345 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 346 #ifdef IPDIVERT 347 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT, divert, CTLFLAG_RW, 0, "DIVERT"); 348 #endif 349 #ifdef PIM 350 SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 351 #endif 352 #ifdef CARP 353 SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 354 #endif 355