in_proto.c revision 82884
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: head/sys/netinet/in_proto.c 82884 2001-09-03 20:03:55Z julian $ 35 */ 36 37#include "opt_ipdivert.h" 38#include "opt_ipx.h" 39#include "opt_ipsec.h" 40#include "opt_inet6.h" 41 42#include <sys/param.h> 43#include <sys/kernel.h> 44#include <sys/socket.h> 45#include <sys/domain.h> 46#include <sys/protosw.h> 47#include <sys/queue.h> 48#include <sys/sysctl.h> 49 50#include <net/if.h> 51#include <net/route.h> 52 53#include <netinet/in.h> 54#include <netinet/in_systm.h> 55#include <netinet/ip.h> 56#include <netinet/ip_var.h> 57#include <netinet/ip_icmp.h> 58#include <netinet/igmp_var.h> 59#include <netinet/tcp.h> 60#include <netinet/tcp_timer.h> 61#include <netinet/tcp_var.h> 62#include <netinet/udp.h> 63#include <netinet/udp_var.h> 64#include <netinet/ip_encap.h> 65 66/* 67 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 68 */ 69 70#ifdef IPSEC 71#include <netinet6/ipsec.h> 72#include <netinet6/ah.h> 73#ifdef IPSEC_ESP 74#include <netinet6/esp.h> 75#endif 76#include <netinet6/ipcomp.h> 77#endif /* IPSEC */ 78 79#ifdef IPXIP 80#include <netipx/ipx_ip.h> 81#endif 82 83#ifdef NSIP 84#include <netns/ns.h> 85#include <netns/ns_if.h> 86#endif 87 88extern struct domain inetdomain; 89static struct pr_usrreqs nousrreqs; 90 91struct protosw inetsw[] = { 92{ 0, &inetdomain, 0, 0, 93 0, 0, 0, 0, 94 0, 95 ip_init, 0, ip_slowtimo, ip_drain, 96 &nousrreqs 97}, 98{ SOCK_DGRAM, &inetdomain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 99 udp_input, 0, udp_ctlinput, ip_ctloutput, 100 0, 101 udp_init, 0, 0, 0, 102 &udp_usrreqs 103}, 104{ SOCK_STREAM, &inetdomain, IPPROTO_TCP, 105 PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 106 tcp_input, 0, tcp_ctlinput, tcp_ctloutput, 107 0, 108 tcp_init, 0, tcp_slowtimo, tcp_drain, 109 &tcp_usrreqs 110}, 111{ SOCK_RAW, &inetdomain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 112 rip_input, 0, rip_ctlinput, rip_ctloutput, 113 0, 114 0, 0, 0, 0, 115 &rip_usrreqs 116}, 117{ SOCK_RAW, &inetdomain, IPPROTO_ICMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 118 icmp_input, 0, 0, rip_ctloutput, 119 0, 120 0, 0, 0, 0, 121 &rip_usrreqs 122}, 123{ SOCK_RAW, &inetdomain, IPPROTO_IGMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 124 igmp_input, 0, 0, rip_ctloutput, 125 0, 126 igmp_init, igmp_fasttimo, igmp_slowtimo, 0, 127 &rip_usrreqs 128}, 129{ SOCK_RAW, &inetdomain, IPPROTO_RSVP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 130 rsvp_input, 0, 0, rip_ctloutput, 131 0, 132 0, 0, 0, 0, 133 &rip_usrreqs 134}, 135#ifdef IPSEC 136{ SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 137 ah4_input, 0, 0, 0, 138 0, 139 0, 0, 0, 0, 140 &nousrreqs 141}, 142#ifdef IPSEC_ESP 143{ SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 144 esp4_input, 0, 0, 0, 145 0, 146 0, 0, 0, 0, 147 &nousrreqs 148}, 149#endif 150{ SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 151 ipcomp4_input, 0, 0, 0, 152 0, 153 0, 0, 0, 0, 154 &nousrreqs 155}, 156#endif /* IPSEC */ 157{ SOCK_RAW, &inetdomain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 158 encap4_input, 0, 0, rip_ctloutput, 159 0, 160 encap_init, 0, 0, 0, 161 &rip_usrreqs 162}, 163# ifdef INET6 164{ SOCK_RAW, &inetdomain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 165 encap4_input, 0, 0, rip_ctloutput, 166 0, 167 encap_init, 0, 0, 0, 168 &rip_usrreqs 169}, 170#endif 171#ifdef IPDIVERT 172{ SOCK_RAW, &inetdomain, IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR, 173 div_input, 0, 0, ip_ctloutput, 174 0, 175 div_init, 0, 0, 0, 176 &div_usrreqs, 177}, 178#endif 179#ifdef IPXIP 180{ SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 181 ipxip_input, 0, ipxip_ctlinput, 0, 182 0, 183 0, 0, 0, 0, 184 &rip_usrreqs 185}, 186#endif 187#ifdef NSIP 188{ SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 189 idpip_input, 0, nsip_ctlinput, 0, 190 0, 191 0, 0, 0, 0, 192 &rip_usrreqs 193}, 194#endif 195 /* raw wildcard */ 196{ SOCK_RAW, &inetdomain, 0, PR_ATOMIC|PR_ADDR, 197 rip_input, 0, 0, rip_ctloutput, 198 0, 199 rip_init, 0, 0, 0, 200 &rip_usrreqs 201}, 202}; 203 204extern int in_inithead __P((void **, int)); 205 206struct domain inetdomain = 207 { AF_INET, "internet", 0, 0, 0, 208 inetsw, 209 &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 0, 210 in_inithead, 32, sizeof(struct sockaddr_in) 211 }; 212 213DOMAIN_SET(inet); 214 215SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 216 "Internet Family"); 217 218SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 219SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 220SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 221SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 222SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 223#ifdef IPSEC 224SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 225#endif /* IPSEC */ 226SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 227#ifdef IPDIVERT 228SYSCTL_NODE(_net_inet, IPPROTO_DIVERT, divert, CTLFLAG_RW, 0, "DIVERT"); 229#endif 230 231