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 * $FreeBSD$ 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 #include <netinet/ipprotosw.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 IPXIP 82 #include <netipx/ipx_ip.h> 83 #endif 84 85 #ifdef NSIP 86 #include <netns/ns.h> 87 #include <netns/ns_if.h> 88 #endif 89 90 extern struct domain inetdomain; 91 static struct pr_usrreqs nousrreqs; 92 93 struct ipprotosw inetsw[] = { 94 { 0, &inetdomain, 0, 0, 95 0, 0, 0, 0, 96 0, 97 ip_init, 0, ip_slowtimo, ip_drain, 98 &nousrreqs 99 }, 100 { SOCK_DGRAM, &inetdomain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 101 udp_input, 0, udp_ctlinput, ip_ctloutput, 102 0, 103 udp_init, 0, 0, 0, 104 &udp_usrreqs 105 }, 106 { SOCK_STREAM, &inetdomain, IPPROTO_TCP, 107 PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 108 tcp_input, 0, tcp_ctlinput, tcp_ctloutput, 109 0, 110 tcp_init, 0, tcp_slowtimo, tcp_drain, 111 &tcp_usrreqs 112 }, 113 { SOCK_RAW, &inetdomain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 114 rip_input, 0, rip_ctlinput, rip_ctloutput, 115 0, 116 0, 0, 0, 0, 117 &rip_usrreqs 118 }, 119 { SOCK_RAW, &inetdomain, IPPROTO_ICMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 120 icmp_input, 0, 0, rip_ctloutput, 121 0, 122 0, 0, 0, 0, 123 &rip_usrreqs 124 }, 125 { SOCK_RAW, &inetdomain, IPPROTO_IGMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 126 igmp_input, 0, 0, rip_ctloutput, 127 0, 128 igmp_init, igmp_fasttimo, igmp_slowtimo, 0, 129 &rip_usrreqs 130 }, 131 { SOCK_RAW, &inetdomain, IPPROTO_RSVP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 132 rsvp_input, 0, 0, rip_ctloutput, 133 0, 134 0, 0, 0, 0, 135 &rip_usrreqs 136 }, 137 #ifdef IPSEC 138 { SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 139 ah4_input, 0, 0, 0, 140 0, 141 0, 0, 0, 0, 142 &nousrreqs 143 }, 144 #ifdef IPSEC_ESP 145 { SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 146 esp4_input, 0, 0, 0, 147 0, 148 0, 0, 0, 0, 149 &nousrreqs 150 }, 151 #endif 152 { SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 153 ipcomp4_input, 0, 0, 0, 154 0, 155 0, 0, 0, 0, 156 &nousrreqs 157 }, 158 #endif /* IPSEC */ 159 { SOCK_RAW, &inetdomain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 160 encap4_input, 0, 0, rip_ctloutput, 161 0, 162 encap_init, 0, 0, 0, 163 &rip_usrreqs 164 }, 165 # ifdef INET6 166 { SOCK_RAW, &inetdomain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 167 encap4_input, 0, 0, rip_ctloutput, 168 0, 169 encap_init, 0, 0, 0, 170 &rip_usrreqs 171 }, 172 #endif 173 #ifdef IPDIVERT 174 { SOCK_RAW, &inetdomain, IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR, 175 div_input, 0, 0, ip_ctloutput, 176 0, 177 div_init, 0, 0, 0, 178 &div_usrreqs, 179 }, 180 #endif 181 #ifdef IPXIP 182 { SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 183 ipxip_input, 0, ipxip_ctlinput, 0, 184 0, 185 0, 0, 0, 0, 186 &rip_usrreqs 187 }, 188 #endif 189 #ifdef NSIP 190 { SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 191 idpip_input, 0, nsip_ctlinput, 0, 192 0, 193 0, 0, 0, 0, 194 &rip_usrreqs 195 }, 196 #endif 197 /* raw wildcard */ 198 { SOCK_RAW, &inetdomain, 0, PR_ATOMIC|PR_ADDR, 199 rip_input, 0, 0, rip_ctloutput, 200 0, 201 rip_init, 0, 0, 0, 202 &rip_usrreqs 203 }, 204 }; 205 206 extern int in_inithead __P((void **, int)); 207 208 struct domain inetdomain = 209 { AF_INET, "internet", 0, 0, 0, 210 (struct protosw *)inetsw, 211 (struct protosw *)&inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 0, 212 in_inithead, 32, sizeof(struct sockaddr_in) 213 }; 214 215 DOMAIN_SET(inet); 216 217 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 218 "Internet Family"); 219 220 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 221 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 222 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 223 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 224 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 225 #ifdef IPSEC 226 SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 227 #endif /* IPSEC */ 228 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 229 #ifdef IPDIVERT 230 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT, divert, CTLFLAG_RW, 0, "DIVERT"); 231 #endif 232 233