in_proto.c revision 148015
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: head/sys/netinet/in_proto.c 148015 2005-07-14 22:22:51Z mlaier $ 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#ifdef IPSEC 73#include <netinet6/ipsec.h> 74#include <netinet6/ah.h> 75#ifdef IPSEC_ESP 76#include <netinet6/esp.h> 77#endif 78#include <netinet6/ipcomp.h> 79#endif /* IPSEC */ 80 81#ifdef FAST_IPSEC 82#include <netipsec/ipsec.h> 83#endif /* FAST_IPSEC */ 84 85#ifdef IPXIP 86#include <netipx/ipx_ip.h> 87#endif 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 98extern struct domain inetdomain; 99 100/* Spacer for loadable protocols. */ 101#define IPPROTOSPACER \ 102{ 0, &inetdomain, PROTO_SPACER, 0, \ 103 NULL, NULL, NULL, NULL, \ 104 NULL, \ 105 NULL, NULL, NULL, NULL, \ 106 &nousrreqs \ 107} 108 109struct protosw inetsw[] = { 110{ 0, &inetdomain, 0, 0, 111 0, 0, 0, 0, 112 0, 113 ip_init, 0, ip_slowtimo, ip_drain, 114 &nousrreqs 115}, 116{ SOCK_DGRAM, &inetdomain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 117 udp_input, 0, udp_ctlinput, ip_ctloutput, 118 0, 119 udp_init, 0, 0, 0, 120 &udp_usrreqs 121}, 122{ SOCK_STREAM, &inetdomain, IPPROTO_TCP, 123 PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 124 tcp_input, 0, tcp_ctlinput, tcp_ctloutput, 125 0, 126 tcp_init, 0, tcp_slowtimo, tcp_drain, 127 &tcp_usrreqs 128}, 129{ SOCK_RAW, &inetdomain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 130 rip_input, 0, rip_ctlinput, rip_ctloutput, 131 0, 132 0, 0, 0, 0, 133 &rip_usrreqs 134}, 135{ SOCK_RAW, &inetdomain, IPPROTO_ICMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 136 icmp_input, 0, 0, rip_ctloutput, 137 0, 138 0, 0, 0, 0, 139 &rip_usrreqs 140}, 141{ SOCK_RAW, &inetdomain, IPPROTO_IGMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 142 igmp_input, 0, 0, rip_ctloutput, 143 0, 144 igmp_init, igmp_fasttimo, igmp_slowtimo, 0, 145 &rip_usrreqs 146}, 147{ SOCK_RAW, &inetdomain, IPPROTO_RSVP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 148 rsvp_input, 0, 0, rip_ctloutput, 149 0, 150 0, 0, 0, 0, 151 &rip_usrreqs 152}, 153#ifdef IPSEC 154{ SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 155 ah4_input, 0, 0, 0, 156 0, 157 0, 0, 0, 0, 158 &nousrreqs 159}, 160#ifdef IPSEC_ESP 161{ SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 162 esp4_input, 0, 0, 0, 163 0, 164 0, 0, 0, 0, 165 &nousrreqs 166}, 167#endif 168{ SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 169 ipcomp4_input, 0, 0, 0, 170 0, 171 0, 0, 0, 0, 172 &nousrreqs 173}, 174#endif /* IPSEC */ 175#ifdef FAST_IPSEC 176{ SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 177 ah4_input, 0, ah4_ctlinput, 0, 178 0, 179 0, 0, 0, 0, 180 &nousrreqs 181}, 182{ SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 183 esp4_input, 0, esp4_ctlinput, 0, 184 0, 185 0, 0, 0, 0, 186 &nousrreqs 187}, 188{ SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 189 ipcomp4_input, 0, 0, 0, 190 0, 191 0, 0, 0, 0, 192 &nousrreqs 193}, 194#endif /* FAST_IPSEC */ 195{ SOCK_RAW, &inetdomain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 196 encap4_input, 0, 0, rip_ctloutput, 197 0, 198 encap_init, 0, 0, 0, 199 &rip_usrreqs 200}, 201{ SOCK_RAW, &inetdomain, IPPROTO_MOBILE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 202 encap4_input, 0, 0, rip_ctloutput, 203 0, 204 encap_init, 0, 0, 0, 205 &rip_usrreqs 206}, 207{ SOCK_RAW, &inetdomain, IPPROTO_GRE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 208 encap4_input, 0, 0, rip_ctloutput, 209 0, 210 encap_init, 0, 0, 0, 211 &rip_usrreqs 212}, 213# ifdef INET6 214{ SOCK_RAW, &inetdomain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 215 encap4_input, 0, 0, rip_ctloutput, 216 0, 217 encap_init, 0, 0, 0, 218 &rip_usrreqs 219}, 220#endif 221#ifdef IPXIP 222{ SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 223 ipxip_input, 0, ipxip_ctlinput, 0, 224 0, 225 0, 0, 0, 0, 226 &rip_usrreqs 227}, 228#endif 229#ifdef PIM 230{ SOCK_RAW, &inetdomain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 231 pim_input, 0, 0, rip_ctloutput, 232 0, 233 0, 0, 0, 0, 234 &rip_usrreqs 235}, 236#endif /* PIM */ 237#ifdef DEV_PFSYNC 238{ SOCK_RAW, &inetdomain, IPPROTO_PFSYNC, PR_ATOMIC|PR_ADDR, 239 pfsync_input, 0, 0, rip_ctloutput, 240 0, 241 0, 0, 0, 0, 242 &rip_usrreqs 243}, 244#endif /* DEV_PFSYNC */ 245#ifdef DEV_CARP 246{ SOCK_RAW, &inetdomain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR, 247 carp_input, (pr_output_t*)rip_output, 0, rip_ctloutput, 248 0, 249 0, 0, 0, 0, 250 &rip_usrreqs 251}, 252#endif /* DEV_CARP */ 253/* Spacer n-times for loadable protocols. */ 254IPPROTOSPACER, 255IPPROTOSPACER, 256IPPROTOSPACER, 257IPPROTOSPACER, 258IPPROTOSPACER, 259IPPROTOSPACER, 260IPPROTOSPACER, 261IPPROTOSPACER, 262/* raw wildcard */ 263{ SOCK_RAW, &inetdomain, 0, PR_ATOMIC|PR_ADDR, 264 rip_input, 0, 0, rip_ctloutput, 265 0, 266 rip_init, 0, 0, 0, 267 &rip_usrreqs 268}, 269}; 270 271extern int in_inithead(void **, int); 272 273struct domain inetdomain = 274 { AF_INET, "internet", 0, 0, 0, 275 inetsw, 276 &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 0, 277 in_inithead, 32, sizeof(struct sockaddr_in) 278 }; 279 280DOMAIN_SET(inet); 281 282SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 283 "Internet Family"); 284 285SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 286SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 287SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 288SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 289SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 290#ifdef FAST_IPSEC 291/* XXX no protocol # to use, pick something "reserved" */ 292SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 293SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 294SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 295SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 296SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 297#else 298#ifdef IPSEC 299SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 300#endif /* IPSEC */ 301#endif /* !FAST_IPSEC */ 302SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 303#ifdef PIM 304SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 305#endif 306#ifdef DEV_PFSYNC 307SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC"); 308#endif 309#ifdef DEV_CARP 310SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 311#endif 312