in_proto.c revision 136695
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 136695 2004-10-19 15:58:22Z andre $ 31 */ 32 33#include "opt_ipdivert.h" 34#include "opt_ipx.h" 35#include "opt_mrouting.h" 36#include "opt_ipsec.h" 37#include "opt_inet6.h" 38#include "opt_pf.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/ip_divert.h> 58#include <netinet/igmp_var.h> 59#ifdef PIM 60#include <netinet/pim_var.h> 61#endif 62#include <netinet/tcp.h> 63#include <netinet/tcp_timer.h> 64#include <netinet/tcp_var.h> 65#include <netinet/udp.h> 66#include <netinet/udp_var.h> 67#include <netinet/ip_encap.h> 68 69/* 70 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 71 */ 72 73#ifdef IPSEC 74#include <netinet6/ipsec.h> 75#include <netinet6/ah.h> 76#ifdef IPSEC_ESP 77#include <netinet6/esp.h> 78#endif 79#include <netinet6/ipcomp.h> 80#endif /* IPSEC */ 81 82#ifdef FAST_IPSEC 83#include <netipsec/ipsec.h> 84#endif /* FAST_IPSEC */ 85 86#ifdef IPXIP 87#include <netipx/ipx_ip.h> 88#endif 89 90#ifdef DEV_PFSYNC 91#include <net/pfvar.h> 92#include <net/if_pfsync.h> 93#endif 94 95extern struct domain inetdomain; 96 97/* Spacer for loadable protocols. */ 98#define IPPROTOSPACER \ 99{ 0, &inetdomain, PROTO_SPACER, 0, \ 100 NULL, NULL, NULL, NULL, \ 101 NULL, \ 102 NULL, NULL, NULL, NULL, \ 103 &nousrreqs \ 104} 105 106struct protosw inetsw[] = { 107{ 0, &inetdomain, 0, 0, 108 0, 0, 0, 0, 109 0, 110 ip_init, 0, ip_slowtimo, ip_drain, 111 &nousrreqs 112}, 113{ SOCK_DGRAM, &inetdomain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 114 udp_input, 0, udp_ctlinput, ip_ctloutput, 115 0, 116 udp_init, 0, 0, 0, 117 &udp_usrreqs 118}, 119{ SOCK_STREAM, &inetdomain, IPPROTO_TCP, 120 PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 121 tcp_input, 0, tcp_ctlinput, tcp_ctloutput, 122 0, 123 tcp_init, 0, tcp_slowtimo, tcp_drain, 124 &tcp_usrreqs 125}, 126{ SOCK_RAW, &inetdomain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 127 rip_input, 0, rip_ctlinput, rip_ctloutput, 128 0, 129 0, 0, 0, 0, 130 &rip_usrreqs 131}, 132{ SOCK_RAW, &inetdomain, IPPROTO_ICMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 133 icmp_input, 0, 0, rip_ctloutput, 134 0, 135 0, 0, 0, 0, 136 &rip_usrreqs 137}, 138{ SOCK_RAW, &inetdomain, IPPROTO_IGMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 139 igmp_input, 0, 0, rip_ctloutput, 140 0, 141 igmp_init, igmp_fasttimo, igmp_slowtimo, 0, 142 &rip_usrreqs 143}, 144{ SOCK_RAW, &inetdomain, IPPROTO_RSVP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 145 rsvp_input, 0, 0, rip_ctloutput, 146 0, 147 0, 0, 0, 0, 148 &rip_usrreqs 149}, 150#ifdef IPSEC 151{ SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 152 ah4_input, 0, 0, 0, 153 0, 154 0, 0, 0, 0, 155 &nousrreqs 156}, 157#ifdef IPSEC_ESP 158{ SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 159 esp4_input, 0, 0, 0, 160 0, 161 0, 0, 0, 0, 162 &nousrreqs 163}, 164#endif 165{ SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 166 ipcomp4_input, 0, 0, 0, 167 0, 168 0, 0, 0, 0, 169 &nousrreqs 170}, 171#endif /* IPSEC */ 172#ifdef FAST_IPSEC 173{ SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 174 ah4_input, 0, ah4_ctlinput, 0, 175 0, 176 0, 0, 0, 0, 177 &nousrreqs 178}, 179{ SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 180 esp4_input, 0, esp4_ctlinput, 0, 181 0, 182 0, 0, 0, 0, 183 &nousrreqs 184}, 185{ SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 186 ipcomp4_input, 0, 0, 0, 187 0, 188 0, 0, 0, 0, 189 &nousrreqs 190}, 191#endif /* FAST_IPSEC */ 192{ SOCK_RAW, &inetdomain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 193 encap4_input, 0, 0, rip_ctloutput, 194 0, 195 encap_init, 0, 0, 0, 196 &rip_usrreqs 197}, 198{ SOCK_RAW, &inetdomain, IPPROTO_MOBILE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 199 encap4_input, 0, 0, rip_ctloutput, 200 0, 201 encap_init, 0, 0, 0, 202 &rip_usrreqs 203}, 204{ SOCK_RAW, &inetdomain, IPPROTO_GRE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 205 encap4_input, 0, 0, rip_ctloutput, 206 0, 207 encap_init, 0, 0, 0, 208 &rip_usrreqs 209}, 210# ifdef INET6 211{ SOCK_RAW, &inetdomain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 212 encap4_input, 0, 0, rip_ctloutput, 213 0, 214 encap_init, 0, 0, 0, 215 &rip_usrreqs 216}, 217#endif 218#ifdef IPDIVERT 219{ SOCK_RAW, &inetdomain, IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR, 220 div_input, 0, div_ctlinput, ip_ctloutput, 221 0, 222 div_init, 0, 0, 0, 223 &div_usrreqs, 224}, 225#endif 226#ifdef IPXIP 227{ SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 228 ipxip_input, 0, ipxip_ctlinput, 0, 229 0, 230 0, 0, 0, 0, 231 &rip_usrreqs 232}, 233#endif 234#ifdef PIM 235{ SOCK_RAW, &inetdomain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 236 pim_input, 0, 0, rip_ctloutput, 237 0, 238 0, 0, 0, 0, 239 &rip_usrreqs 240}, 241#endif /* PIM */ 242#ifdef DEV_PFSYNC 243{ SOCK_RAW, &inetdomain, IPPROTO_PFSYNC, PR_ATOMIC|PR_ADDR, 244 pfsync_input, 0, 0, rip_ctloutput, 245 0, 246 0, 0, 0, 0, 247 &rip_usrreqs 248}, 249#endif /* DEV_PFSYNC */ 250/* Spacer n-times for loadable protocols. */ 251IPPROTOSPACER, 252IPPROTOSPACER, 253IPPROTOSPACER, 254IPPROTOSPACER, 255IPPROTOSPACER, 256IPPROTOSPACER, 257IPPROTOSPACER, 258IPPROTOSPACER, 259/* raw wildcard */ 260{ SOCK_RAW, &inetdomain, 0, PR_ATOMIC|PR_ADDR, 261 rip_input, 0, 0, rip_ctloutput, 262 0, 263 rip_init, 0, 0, 0, 264 &rip_usrreqs 265}, 266}; 267 268extern int in_inithead(void **, int); 269 270struct domain inetdomain = 271 { AF_INET, "internet", 0, 0, 0, 272 inetsw, 273 &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 0, 274 in_inithead, 32, sizeof(struct sockaddr_in) 275 }; 276 277DOMAIN_SET(inet); 278 279SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 280 "Internet Family"); 281 282SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 283SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 284SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 285SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 286SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 287#ifdef FAST_IPSEC 288/* XXX no protocol # to use, pick something "reserved" */ 289SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 290SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 291SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 292SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 293SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 294#else 295#ifdef IPSEC 296SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 297#endif /* IPSEC */ 298#endif /* !FAST_IPSEC */ 299SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 300#ifdef IPDIVERT 301SYSCTL_NODE(_net_inet, IPPROTO_DIVERT, divert, CTLFLAG_RW, 0, "DIVERT"); 302#endif 303#ifdef PIM 304SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 305#endif 306