in_proto.c revision 136714
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 136714 2004-10-19 21:14:57Z andre $ 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 39#include <sys/param.h> 40#include <sys/systm.h> 41#include <sys/kernel.h> 42#include <sys/socket.h> 43#include <sys/domain.h> 44#include <sys/protosw.h> 45#include <sys/queue.h> 46#include <sys/sysctl.h> 47 48#include <net/if.h> 49#include <net/route.h> 50 51#include <netinet/in.h> 52#include <netinet/in_systm.h> 53#include <netinet/ip.h> 54#include <netinet/ip_var.h> 55#include <netinet/ip_icmp.h> 56#include <netinet/igmp_var.h> 57#ifdef PIM 58#include <netinet/pim_var.h> 59#endif 60#include <netinet/tcp.h> 61#include <netinet/tcp_timer.h> 62#include <netinet/tcp_var.h> 63#include <netinet/udp.h> 64#include <netinet/udp_var.h> 65#include <netinet/ip_encap.h> 66 67/* 68 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 69 */ 70 71#ifdef IPSEC 72#include <netinet6/ipsec.h> 73#include <netinet6/ah.h> 74#ifdef IPSEC_ESP 75#include <netinet6/esp.h> 76#endif 77#include <netinet6/ipcomp.h> 78#endif /* IPSEC */ 79 80#ifdef FAST_IPSEC 81#include <netipsec/ipsec.h> 82#endif /* FAST_IPSEC */ 83 84#ifdef IPXIP 85#include <netipx/ipx_ip.h> 86#endif 87 88#ifdef DEV_PFSYNC 89#include <net/pfvar.h> 90#include <net/if_pfsync.h> 91#endif 92 93extern struct domain inetdomain; 94 95/* Spacer for loadable protocols. */ 96#define IPPROTOSPACER \ 97{ 0, &inetdomain, PROTO_SPACER, 0, \ 98 NULL, NULL, NULL, NULL, \ 99 NULL, \ 100 NULL, NULL, NULL, NULL, \ 101 &nousrreqs \ 102} 103 104struct protosw inetsw[] = { 105{ 0, &inetdomain, 0, 0, 106 0, 0, 0, 0, 107 0, 108 ip_init, 0, ip_slowtimo, ip_drain, 109 &nousrreqs 110}, 111{ SOCK_DGRAM, &inetdomain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 112 udp_input, 0, udp_ctlinput, ip_ctloutput, 113 0, 114 udp_init, 0, 0, 0, 115 &udp_usrreqs 116}, 117{ SOCK_STREAM, &inetdomain, IPPROTO_TCP, 118 PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 119 tcp_input, 0, tcp_ctlinput, tcp_ctloutput, 120 0, 121 tcp_init, 0, tcp_slowtimo, tcp_drain, 122 &tcp_usrreqs 123}, 124{ SOCK_RAW, &inetdomain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 125 rip_input, 0, rip_ctlinput, rip_ctloutput, 126 0, 127 0, 0, 0, 0, 128 &rip_usrreqs 129}, 130{ SOCK_RAW, &inetdomain, IPPROTO_ICMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 131 icmp_input, 0, 0, rip_ctloutput, 132 0, 133 0, 0, 0, 0, 134 &rip_usrreqs 135}, 136{ SOCK_RAW, &inetdomain, IPPROTO_IGMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 137 igmp_input, 0, 0, rip_ctloutput, 138 0, 139 igmp_init, igmp_fasttimo, igmp_slowtimo, 0, 140 &rip_usrreqs 141}, 142{ SOCK_RAW, &inetdomain, IPPROTO_RSVP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 143 rsvp_input, 0, 0, rip_ctloutput, 144 0, 145 0, 0, 0, 0, 146 &rip_usrreqs 147}, 148#ifdef IPSEC 149{ SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 150 ah4_input, 0, 0, 0, 151 0, 152 0, 0, 0, 0, 153 &nousrreqs 154}, 155#ifdef IPSEC_ESP 156{ SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 157 esp4_input, 0, 0, 0, 158 0, 159 0, 0, 0, 0, 160 &nousrreqs 161}, 162#endif 163{ SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 164 ipcomp4_input, 0, 0, 0, 165 0, 166 0, 0, 0, 0, 167 &nousrreqs 168}, 169#endif /* IPSEC */ 170#ifdef FAST_IPSEC 171{ SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 172 ah4_input, 0, ah4_ctlinput, 0, 173 0, 174 0, 0, 0, 0, 175 &nousrreqs 176}, 177{ SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 178 esp4_input, 0, esp4_ctlinput, 0, 179 0, 180 0, 0, 0, 0, 181 &nousrreqs 182}, 183{ SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 184 ipcomp4_input, 0, 0, 0, 185 0, 186 0, 0, 0, 0, 187 &nousrreqs 188}, 189#endif /* FAST_IPSEC */ 190{ SOCK_RAW, &inetdomain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 191 encap4_input, 0, 0, rip_ctloutput, 192 0, 193 encap_init, 0, 0, 0, 194 &rip_usrreqs 195}, 196{ SOCK_RAW, &inetdomain, IPPROTO_MOBILE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 197 encap4_input, 0, 0, rip_ctloutput, 198 0, 199 encap_init, 0, 0, 0, 200 &rip_usrreqs 201}, 202{ SOCK_RAW, &inetdomain, IPPROTO_GRE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 203 encap4_input, 0, 0, rip_ctloutput, 204 0, 205 encap_init, 0, 0, 0, 206 &rip_usrreqs 207}, 208# ifdef INET6 209{ SOCK_RAW, &inetdomain, IPPROTO_IPV6, 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#endif 216#ifdef IPXIP 217{ SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 218 ipxip_input, 0, ipxip_ctlinput, 0, 219 0, 220 0, 0, 0, 0, 221 &rip_usrreqs 222}, 223#endif 224#ifdef PIM 225{ SOCK_RAW, &inetdomain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 226 pim_input, 0, 0, rip_ctloutput, 227 0, 228 0, 0, 0, 0, 229 &rip_usrreqs 230}, 231#endif /* PIM */ 232#ifdef DEV_PFSYNC 233{ SOCK_RAW, &inetdomain, IPPROTO_PFSYNC, PR_ATOMIC|PR_ADDR, 234 pfsync_input, 0, 0, rip_ctloutput, 235 0, 236 0, 0, 0, 0, 237 &rip_usrreqs 238}, 239#endif /* DEV_PFSYNC */ 240/* Spacer n-times for loadable protocols. */ 241IPPROTOSPACER, 242IPPROTOSPACER, 243IPPROTOSPACER, 244IPPROTOSPACER, 245IPPROTOSPACER, 246IPPROTOSPACER, 247IPPROTOSPACER, 248IPPROTOSPACER, 249/* raw wildcard */ 250{ SOCK_RAW, &inetdomain, 0, PR_ATOMIC|PR_ADDR, 251 rip_input, 0, 0, rip_ctloutput, 252 0, 253 rip_init, 0, 0, 0, 254 &rip_usrreqs 255}, 256}; 257 258extern int in_inithead(void **, int); 259 260struct domain inetdomain = 261 { AF_INET, "internet", 0, 0, 0, 262 inetsw, 263 &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 0, 264 in_inithead, 32, sizeof(struct sockaddr_in) 265 }; 266 267DOMAIN_SET(inet); 268 269SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 270 "Internet Family"); 271 272SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 273SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 274SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 275SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 276SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 277#ifdef FAST_IPSEC 278/* XXX no protocol # to use, pick something "reserved" */ 279SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 280SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 281SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 282SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 283SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 284#else 285#ifdef IPSEC 286SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 287#endif /* IPSEC */ 288#endif /* !FAST_IPSEC */ 289SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 290#ifdef PIM 291SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 292#endif 293