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 1.13 2005/07/15 17:54:47 eirikn 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 45 #include <sys/param.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 56 #include <netinet/in.h> 57 #include <netinet/in_systm.h> 58 #include <netinet/ip.h> 59 #include <netinet/ip_var.h> 60 #include <netinet/ip_icmp.h> 61 #include <netinet/igmp_var.h> 62 #ifdef PIM 63 #include <netinet/pim_var.h> 64 #endif 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 /* 74 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 75 */ 76 77 #ifdef IPSEC 78 #include <netinet6/ipsec.h> 79 #include <netinet6/ah.h> 80 #ifdef IPSEC_ESP 81 #include <netinet6/esp.h> 82 #endif 83 #include <netinet6/ipcomp.h> 84 #endif /* IPSEC */ 85 86 #ifdef FAST_IPSEC 87 #include <netproto/ipsec/ipsec.h> 88 #endif /* FAST_IPSEC */ 89 90 #ifdef IPXIP 91 #include <netproto/ipx/ipx_ip.h> 92 #endif 93 94 #ifdef NSIP 95 #include <netns/ns.h> 96 #include <netns/ns_if.h> 97 #endif 98 99 #ifdef SCTP 100 #include <netinet/in_pcb.h> 101 #include <netinet/sctp_pcb.h> 102 #include <netinet/sctp.h> 103 #include <netinet/sctp_var.h> 104 #endif /* SCTP */ 105 106 #include <net/netisr.h> /* for cpu0_soport */ 107 108 extern struct domain inetdomain; 109 static struct pr_usrreqs nousrreqs; 110 111 struct protosw inetsw[] = { 112 { 0, &inetdomain, 0, 0, 113 0, 0, 0, 0, 114 cpu0_soport, 115 ip_init, 0, ip_slowtimo, ip_drain, 116 &nousrreqs 117 }, 118 { SOCK_DGRAM, &inetdomain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 119 udp_input, 0, udp_ctlinput, ip_ctloutput, 120 udp_soport, 121 udp_init, 0, 0, 0, 122 &udp_usrreqs 123 }, 124 { SOCK_STREAM, &inetdomain, IPPROTO_TCP, 125 PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 126 tcp_input, 0, tcp_ctlinput, tcp_ctloutput, 127 tcp_soport, 128 tcp_init, 0, tcp_slowtimo, tcp_drain, 129 &tcp_usrreqs 130 }, 131 #ifdef SCTP 132 /* 133 * Order is very important here, we add the good one in 134 * in this postion so it maps to the right ip_protox[] 135 * postion for SCTP. Don't move the one above below 136 * this one or IPv6/4 compatability will break 137 */ 138 { SOCK_DGRAM, &inetdomain, IPPROTO_SCTP, PR_ADDR_OPT|PR_WANTRCVD, 139 sctp_input, 0, sctp_ctlinput, sctp_ctloutput, 140 cpu0_soport, 141 sctp_init, 0, 0, sctp_drain, 142 &sctp_usrreqs 143 }, 144 { SOCK_SEQPACKET,&inetdomain, IPPROTO_SCTP, PR_ADDR_OPT|PR_WANTRCVD, 145 sctp_input, 0, sctp_ctlinput, sctp_ctloutput, 146 cpu0_soport, 147 0, 0, 0, sctp_drain, 148 &sctp_usrreqs 149 }, 150 151 { SOCK_STREAM, &inetdomain, IPPROTO_SCTP, PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD, 152 sctp_input, 0, sctp_ctlinput, sctp_ctloutput, 153 cpu0_soport, 154 0, 0, 0, sctp_drain, 155 &sctp_usrreqs 156 }, 157 #endif /* SCTP */ 158 { SOCK_RAW, &inetdomain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 159 rip_input, 0, rip_ctlinput, rip_ctloutput, 160 cpu0_soport, 161 0, 0, 0, 0, 162 &rip_usrreqs 163 }, 164 { SOCK_RAW, &inetdomain, IPPROTO_ICMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 165 icmp_input, 0, 0, rip_ctloutput, 166 cpu0_soport, 167 0, 0, 0, 0, 168 &rip_usrreqs 169 }, 170 { SOCK_RAW, &inetdomain, IPPROTO_IGMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 171 igmp_input, 0, 0, rip_ctloutput, 172 cpu0_soport, 173 igmp_init, igmp_fasttimo, igmp_slowtimo, 0, 174 &rip_usrreqs 175 }, 176 { SOCK_RAW, &inetdomain, IPPROTO_RSVP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 177 rsvp_input, 0, 0, rip_ctloutput, 178 cpu0_soport, 179 0, 0, 0, 0, 180 &rip_usrreqs 181 }, 182 #ifdef IPSEC 183 { SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 184 ah4_input, 0, 0, 0, 185 cpu0_soport, 186 0, 0, 0, 0, 187 &nousrreqs 188 }, 189 #ifdef IPSEC_ESP 190 { SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 191 esp4_input, 0, 0, 0, 192 cpu0_soport, 193 0, 0, 0, 0, 194 &nousrreqs 195 }, 196 #endif 197 { SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 198 ipcomp4_input, 0, 0, 0, 199 cpu0_soport, 200 0, 0, 0, 0, 201 &nousrreqs 202 }, 203 #endif /* IPSEC */ 204 #ifdef FAST_IPSEC 205 { SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 206 ipsec4_common_input, 0, 0, 0, 207 cpu0_soport, 208 0, 0, 0, 0, 209 &nousrreqs 210 }, 211 { SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 212 ipsec4_common_input, 0, 0, 0, 213 cpu0_soport, 214 0, 0, 0, 0, 215 &nousrreqs 216 }, 217 { SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 218 ipsec4_common_input, 0, 0, 0, 219 cpu0_soport, 220 0, 0, 0, 0, 221 &nousrreqs 222 }, 223 #endif /* FAST_IPSEC */ 224 { SOCK_RAW, &inetdomain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 225 encap4_input, 0, 0, rip_ctloutput, 226 cpu0_soport, 227 encap_init, 0, 0, 0, 228 &rip_usrreqs 229 }, 230 { SOCK_RAW, &inetdomain, IPPROTO_MOBILE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 231 encap4_input, 0, 0, rip_ctloutput, 232 cpu0_soport, 233 encap_init, 0, 0, 0, 234 &rip_usrreqs 235 }, 236 { SOCK_RAW, &inetdomain, IPPROTO_GRE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 237 encap4_input, 0, 0, rip_ctloutput, 238 cpu0_soport, 239 encap_init, 0, 0, 0, 240 &rip_usrreqs 241 }, 242 # ifdef INET6 243 { SOCK_RAW, &inetdomain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 244 encap4_input, 0, 0, rip_ctloutput, 245 cpu0_soport, 246 encap_init, 0, 0, 0, 247 &rip_usrreqs 248 }, 249 #endif 250 #ifdef IPDIVERT 251 { SOCK_RAW, &inetdomain, IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR, 252 div_input, 0, 0, ip_ctloutput, 253 cpu0_soport, 254 div_init, 0, 0, 0, 255 &div_usrreqs, 256 }, 257 #endif 258 #ifdef IPXIP 259 { SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 260 ipxip_input, 0, ipxip_ctlinput, 0, 261 cpu0_soport, 262 0, 0, 0, 0, 263 &rip_usrreqs 264 }, 265 #endif 266 #ifdef NSIP 267 { SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 268 idpip_input, 0, nsip_ctlinput, 0, 269 cpu0_soport, 270 0, 0, 0, 0, 271 &rip_usrreqs 272 }, 273 #endif 274 #ifdef PIM 275 { SOCK_RAW, &inetdomain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 276 pim_input, 0, 0, rip_ctloutput, 277 cpu0_soport, 278 0, 0, 0, 0, 279 &rip_usrreqs 280 }, 281 #endif 282 #ifdef NPFSYNC 283 { SOCK_RAW, &inetdomain, IPPROTO_PFSYNC, PR_ATOMIC|PR_ADDR, 284 pfsync_input, 0, 0, rip_ctloutput, 285 0, 286 0, 0, 0, 0, 287 &rip_usrreqs 288 }, 289 #endif /* NPFSYNC */ 290 /* raw wildcard */ 291 { SOCK_RAW, &inetdomain, 0, PR_ATOMIC|PR_ADDR, 292 rip_input, 0, 0, rip_ctloutput, 293 cpu0_soport, 294 rip_init, 0, 0, 0, 295 &rip_usrreqs 296 }, 297 }; 298 299 struct domain inetdomain = { 300 AF_INET, "internet", NULL, NULL, NULL, 301 inetsw, &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 302 SLIST_ENTRY_INITIALIZER, 303 in_inithead, 32, sizeof(struct sockaddr_in), 304 }; 305 306 DOMAIN_SET(inet); 307 308 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 309 "Internet Family"); 310 311 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 312 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 313 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 314 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 315 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 316 #ifdef FAST_IPSEC 317 /* XXX no protocol # to use, pick something "reserved" */ 318 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 319 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 320 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 321 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 322 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 323 #else 324 #ifdef IPSEC 325 SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 326 #endif /* IPSEC */ 327 #endif /* !FAST_IPSEC */ 328 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 329 #ifdef IPDIVERT 330 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT, divert, CTLFLAG_RW, 0, "DIVERT"); 331 #endif 332 #ifdef PIM 333 SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 334 #endif 335