in_proto.c revision 148918
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 148918 2005-08-10 06:41:04Z obrien $ 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 72static 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 100extern struct domain inetdomain; 101 102/* Spacer for loadable protocols. */ 103#define IPPROTOSPACER \ 104{ 0, &inetdomain, PROTO_SPACER, 0, \ 105 NULL, NULL, NULL, NULL, \ 106 NULL, \ 107 NULL, NULL, NULL, NULL, \ 108 &nousrreqs \ 109} 110 111struct protosw inetsw[] = { 112{ 0, &inetdomain, 0, 0, 113 0, 0, 0, 0, 114 0, 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 0, 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 0, 128 tcp_init, 0, tcp_slowtimo, tcp_drain, 129 &tcp_usrreqs 130}, 131{ SOCK_RAW, &inetdomain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 132 rip_input, 0, rip_ctlinput, rip_ctloutput, 133 0, 134 0, 0, 0, 0, 135 &rip_usrreqs 136}, 137{ SOCK_RAW, &inetdomain, IPPROTO_ICMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 138 icmp_input, 0, 0, rip_ctloutput, 139 0, 140 0, 0, 0, 0, 141 &rip_usrreqs 142}, 143{ SOCK_RAW, &inetdomain, IPPROTO_IGMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 144 igmp_input, 0, 0, rip_ctloutput, 145 0, 146 igmp_init, igmp_fasttimo, igmp_slowtimo, 0, 147 &rip_usrreqs 148}, 149{ SOCK_RAW, &inetdomain, IPPROTO_RSVP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 150 rsvp_input, 0, 0, rip_ctloutput, 151 0, 152 0, 0, 0, 0, 153 &rip_usrreqs 154}, 155#ifdef IPSEC 156{ SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 157 ah4_input, 0, 0, 0, 158 0, 159 0, 0, 0, 0, 160 &nousrreqs 161}, 162#ifdef IPSEC_ESP 163{ SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 164 esp4_input, 0, 0, 0, 165 0, 166 0, 0, 0, 0, 167 &nousrreqs 168}, 169#endif 170{ SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 171 ipcomp4_input, 0, 0, 0, 172 0, 173 0, 0, 0, 0, 174 &nousrreqs 175}, 176#endif /* IPSEC */ 177#ifdef FAST_IPSEC 178{ SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 179 ah4_input, 0, ah4_ctlinput, 0, 180 0, 181 0, 0, 0, 0, 182 &nousrreqs 183}, 184{ SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 185 esp4_input, 0, esp4_ctlinput, 0, 186 0, 187 0, 0, 0, 0, 188 &nousrreqs 189}, 190{ SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 191 ipcomp4_input, 0, 0, 0, 192 0, 193 0, 0, 0, 0, 194 &nousrreqs 195}, 196#endif /* FAST_IPSEC */ 197{ SOCK_RAW, &inetdomain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 198 encap4_input, 0, 0, rip_ctloutput, 199 0, 200 encap_init, 0, 0, 0, 201 &rip_usrreqs 202}, 203{ SOCK_RAW, &inetdomain, IPPROTO_MOBILE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 204 encap4_input, 0, 0, rip_ctloutput, 205 0, 206 encap_init, 0, 0, 0, 207 &rip_usrreqs 208}, 209{ SOCK_RAW, &inetdomain, IPPROTO_GRE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 210 encap4_input, 0, 0, rip_ctloutput, 211 0, 212 encap_init, 0, 0, 0, 213 &rip_usrreqs 214}, 215# ifdef INET6 216{ SOCK_RAW, &inetdomain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 217 encap4_input, 0, 0, rip_ctloutput, 218 0, 219 encap_init, 0, 0, 0, 220 &rip_usrreqs 221}, 222#endif 223#ifdef IPXIP 224{ SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 225 ipxip_input, 0, ipxip_ctlinput, 0, 226 0, 227 0, 0, 0, 0, 228 &rip_usrreqs 229}, 230#endif 231#ifdef PIM 232{ SOCK_RAW, &inetdomain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 233 pim_input, 0, 0, rip_ctloutput, 234 0, 235 0, 0, 0, 0, 236 &rip_usrreqs 237}, 238#endif /* PIM */ 239#ifdef DEV_PFSYNC 240{ SOCK_RAW, &inetdomain, IPPROTO_PFSYNC, PR_ATOMIC|PR_ADDR, 241 pfsync_input, 0, 0, rip_ctloutput, 242 0, 243 0, 0, 0, 0, 244 &rip_usrreqs 245}, 246#endif /* DEV_PFSYNC */ 247#ifdef DEV_CARP 248{ SOCK_RAW, &inetdomain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR, 249 carp_input, (pr_output_t*)rip_output, 0, rip_ctloutput, 250 0, 251 0, 0, 0, 0, 252 &rip_usrreqs 253}, 254#endif /* DEV_CARP */ 255/* Spacer n-times for loadable protocols. */ 256IPPROTOSPACER, 257IPPROTOSPACER, 258IPPROTOSPACER, 259IPPROTOSPACER, 260IPPROTOSPACER, 261IPPROTOSPACER, 262IPPROTOSPACER, 263IPPROTOSPACER, 264/* raw wildcard */ 265{ SOCK_RAW, &inetdomain, 0, PR_ATOMIC|PR_ADDR, 266 rip_input, 0, 0, rip_ctloutput, 267 0, 268 rip_init, 0, 0, 0, 269 &rip_usrreqs 270}, 271}; 272 273extern int in_inithead(void **, int); 274 275struct domain inetdomain = 276 { AF_INET, "internet", 0, 0, 0, 277 inetsw, 278 &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 0, 279 in_inithead, 32, sizeof(struct sockaddr_in) 280 }; 281 282DOMAIN_SET(inet); 283 284SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 285 "Internet Family"); 286 287SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 288SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 289SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 290SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 291SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 292#ifdef FAST_IPSEC 293/* XXX no protocol # to use, pick something "reserved" */ 294SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 295SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 296SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 297SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 298SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 299#else 300#ifdef IPSEC 301SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 302#endif /* IPSEC */ 303#endif /* !FAST_IPSEC */ 304SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 305#ifdef PIM 306SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 307#endif 308#ifdef DEV_PFSYNC 309SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC"); 310#endif 311#ifdef DEV_CARP 312SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 313#endif 314