1 /* $NetBSD: in_proto.c,v 1.54 2001/12/21 06:30:43 itojun Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)in_proto.c 8.2 (Berkeley) 2/9/95 65 */ 66 67 #include <sys/cdefs.h> 68 __KERNEL_RCSID(0, "$NetBSD: in_proto.c,v 1.54 2001/12/21 06:30:43 itojun Exp $"); 69 70 #include "opt_mrouting.h" 71 #include "opt_eon.h" /* ISO CLNL over IP */ 72 #include "opt_iso.h" /* ISO TP tunneled over IP */ 73 #include "opt_ns.h" /* NSIP: XNS tunneled over IP */ 74 #include "opt_inet.h" 75 #include "opt_ipsec.h" 76 77 #include <sys/param.h> 78 #include <sys/socket.h> 79 #include <sys/protosw.h> 80 #include <sys/domain.h> 81 #include <sys/mbuf.h> 82 83 #include <net/if.h> 84 #include <net/radix.h> 85 #include <net/route.h> 86 87 #include <netinet/in.h> 88 #include <netinet/in_systm.h> 89 #include <netinet/ip.h> 90 #include <netinet/ip_var.h> 91 #include <netinet/ip_icmp.h> 92 #include <netinet/in_pcb.h> 93 94 #ifdef INET6 95 #ifndef INET 96 #include <netinet/in.h> 97 #endif 98 #include <netinet/ip6.h> 99 #endif 100 101 #include <netinet/igmp_var.h> 102 #include <netinet/tcp.h> 103 #include <netinet/tcp_fsm.h> 104 #include <netinet/tcp_seq.h> 105 #include <netinet/tcp_timer.h> 106 #include <netinet/tcp_var.h> 107 #include <netinet/tcpip.h> 108 #include <netinet/tcp_debug.h> 109 #include <netinet/udp.h> 110 #include <netinet/udp_var.h> 111 #include <netinet/ip_encap.h> 112 /* 113 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 114 */ 115 116 #ifdef IPSEC 117 #include <netinet6/ah.h> 118 #ifdef IPSEC_ESP 119 #include <netinet6/esp.h> 120 #endif 121 #include <netinet6/ipcomp.h> 122 #endif /* IPSEC */ 123 124 #ifdef NSIP 125 #include <netns/ns_var.h> 126 #include <netns/idp_var.h> 127 #endif /* NSIP */ 128 129 #ifdef TPIP 130 #include <netiso/tp_param.h> 131 #include <netiso/tp_var.h> 132 #endif /* TPIP */ 133 134 #ifdef EON 135 #include <netiso/eonvar.h> 136 #endif /* EON */ 137 138 #include "ipip.h" 139 #if NIPIP > 0 || defined(MROUTING) 140 #include <netinet/ip_ipip.h> 141 #endif /* NIPIP > 0 || MROUTING */ 142 143 #include "gre.h" 144 #if NGRE > 0 145 #include <netinet/ip_gre.h> 146 #endif 147 148 extern struct domain inetdomain; 149 150 struct protosw inetsw[] = { 151 { 0, &inetdomain, 0, 0, 152 0, ip_output, 0, 0, 153 0, 154 ip_init, 0, ip_slowtimo, ip_drain, ip_sysctl 155 }, 156 { SOCK_DGRAM, &inetdomain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 157 udp_input, 0, udp_ctlinput, ip_ctloutput, 158 udp_usrreq, 159 udp_init, 0, 0, 0, udp_sysctl 160 }, 161 { SOCK_STREAM, &inetdomain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS, 162 tcp_input, 0, tcp_ctlinput, tcp_ctloutput, 163 tcp_usrreq, 164 tcp_init, 0, tcp_slowtimo, tcp_drain, tcp_sysctl 165 }, 166 { SOCK_RAW, &inetdomain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 167 rip_input, rip_output, rip_ctlinput, rip_ctloutput, 168 rip_usrreq, 169 0, 0, 0, 0, 170 }, 171 { SOCK_RAW, &inetdomain, IPPROTO_ICMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 172 icmp_input, rip_output, rip_ctlinput, rip_ctloutput, 173 rip_usrreq, 174 icmp_init, 0, 0, 0, icmp_sysctl 175 }, 176 #ifdef IPSEC 177 { SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 178 ah4_input, 0, ah4_ctlinput, 0, 179 0, 180 0, 0, 0, 0, ipsec_sysctl 181 }, 182 #ifdef IPSEC_ESP 183 { SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 184 esp4_input, 0, esp4_ctlinput, 0, 185 0, 186 0, 0, 0, 0, ipsec_sysctl 187 }, 188 #endif 189 { SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 190 ipcomp4_input, 0, 0, 0, 191 0, 192 0, 0, 0, 0, ipsec_sysctl 193 }, 194 #endif /* IPSEC */ 195 { SOCK_RAW, &inetdomain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 196 encap4_input, rip_output, rip_ctlinput, rip_ctloutput, 197 rip_usrreq, /*XXX*/ 198 encap_init, 0, 0, 0, 199 }, 200 #ifdef INET6 201 { SOCK_RAW, &inetdomain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 202 encap4_input, rip_output, rip_ctlinput, rip_ctloutput, 203 rip_usrreq, /*XXX*/ 204 encap_init, 0, 0, 0, 205 }, 206 #endif /* INET6 */ 207 #if NGRE > 0 208 { SOCK_RAW, &inetdomain, IPPROTO_GRE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 209 gre_input, rip_output, rip_ctlinput, rip_ctloutput, 210 rip_usrreq, 211 0, 0, 0, 0, 212 }, 213 { SOCK_RAW, &inetdomain, IPPROTO_MOBILE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 214 gre_mobile_input, rip_output, rip_ctlinput, rip_ctloutput, 215 rip_usrreq, 216 0, 0, 0, 0, 217 }, 218 #endif /* NGRE > 0 */ 219 { SOCK_RAW, &inetdomain, IPPROTO_IGMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 220 igmp_input, rip_output, rip_ctlinput, rip_ctloutput, 221 rip_usrreq, 222 igmp_init, igmp_fasttimo, igmp_slowtimo, 0, 223 }, 224 #ifdef TPIP 225 { SOCK_SEQPACKET,&inetdomain, IPPROTO_TP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_LASTHDR|PR_ABRTACPTDIS, 226 tpip_input, 0, tpip_ctlinput, tp_ctloutput, 227 tp_usrreq, 228 tp_init, 0, tp_slowtimo, tp_drain, 229 }, 230 #endif /* TPIP */ 231 #ifdef ISO 232 /* EON (ISO CLNL over IP) */ 233 #ifdef EON 234 { SOCK_RAW, &inetdomain, IPPROTO_EON, PR_LASTHDR, 235 eoninput, 0, eonctlinput, 0, 236 0, 237 eonprotoinit, 0, 0, 0, 238 }, 239 #else 240 { SOCK_RAW, &inetdomain, IPPROTO_EON, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 241 encap4_input, rip_output, rip_ctlinput, rip_ctloutput, 242 rip_usrreq, /*XXX*/ 243 encap_init, 0, 0, 0, 244 }, 245 #endif /* EON */ 246 #endif /* ISO */ 247 #ifdef NSIP 248 { SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 249 idpip_input, NULL, nsip_ctlinput, 0, 250 rip_usrreq, 251 0, 0, 0, 0, 252 }, 253 #endif /* NSIP */ 254 /* raw wildcard */ 255 { SOCK_RAW, &inetdomain, 0, PR_ATOMIC|PR_ADDR, 256 rip_input, rip_output, rip_ctlinput, rip_ctloutput, 257 rip_usrreq, 258 rip_init, 0, 0, 0, 259 }, 260 }; 261 262 #if NIPIP > 0 263 struct protosw ipip_protosw = 264 { SOCK_RAW, &inetdomain, IPPROTO_IPIP, PR_ATOMIC|PR_ADDR, 265 ipip_input, rip_output, 0, rip_ctloutput, 266 rip_usrreq, /* XXX */ 267 0, 0, 0, 0, 268 }; 269 #endif /* NIPIP */ 270 271 struct domain inetdomain = 272 { PF_INET, "internet", 0, 0, 0, 273 inetsw, &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 0, 274 rn_inithead, 32, sizeof(struct sockaddr_in) }; 275 276 u_char ip_protox[IPPROTO_MAX]; 277 278 int icmperrppslim = 100; /* 100pps */ 279