in6_proto.c revision 1.71
1 /* $NetBSD: in6_proto.c,v 1.71 2007/02/17 20:38:05 dyoung Exp $ */ 2 /* $KAME: in6_proto.c,v 1.66 2000/10/10 15:35:47 itojun Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1982, 1986, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93 62 */ 63 64 #include <sys/cdefs.h> 65 __KERNEL_RCSID(0, "$NetBSD: in6_proto.c,v 1.71 2007/02/17 20:38:05 dyoung Exp $"); 66 67 #include "opt_inet.h" 68 #include "opt_ipsec.h" 69 #include "opt_iso.h" 70 71 #include <sys/param.h> 72 #include <sys/socket.h> 73 #include <sys/protosw.h> 74 #include <sys/kernel.h> 75 #include <sys/domain.h> 76 #include <sys/mbuf.h> 77 78 #include <net/if.h> 79 #include <net/radix.h> 80 #include <net/route.h> 81 82 #include <netinet/in.h> 83 #include <netinet/in_systm.h> 84 #include <netinet/in_var.h> 85 #include <netinet/ip_encap.h> 86 #include <netinet/ip.h> 87 #include <netinet/ip_var.h> 88 #include <netinet/in_pcb.h> 89 #include <netinet/ip6.h> 90 #include <netinet6/ip6_var.h> 91 #include <netinet/icmp6.h> 92 #include <netinet6/in6_pcb.h> 93 94 #include <netinet/tcp.h> 95 #include <netinet/tcp_fsm.h> 96 #include <netinet/tcp_seq.h> 97 #include <netinet/tcp_timer.h> 98 #include <netinet/tcp_var.h> 99 #include <netinet/tcpip.h> 100 #include <netinet/tcp_debug.h> 101 102 #include <netinet6/udp6.h> 103 #include <netinet6/udp6_var.h> 104 105 #include <netinet6/pim6_var.h> 106 107 #include <netinet6/nd6.h> 108 109 #ifdef IPSEC 110 #include <netinet6/ipsec.h> 111 #include <netinet6/ah.h> 112 #ifdef IPSEC_ESP 113 #include <netinet6/esp.h> 114 #endif 115 #include <netinet6/ipcomp.h> 116 #endif /* IPSEC */ 117 118 #ifdef FAST_IPSEC 119 #include <netipsec/ipsec.h> 120 #include <netipsec/ipsec6.h> 121 #include <netipsec/key.h> 122 #endif /* FAST_IPSEC */ 123 124 125 #include "carp.h" 126 #if NCARP > 0 127 #include <netinet/ip_carp.h> 128 #endif 129 130 #include "etherip.h" 131 #if NETHERIP > 1 132 #include <netinet6/ip6_etherip.h> 133 #endif 134 135 #include <netinet6/ip6protosw.h> 136 137 #include <net/net_osdep.h> 138 139 #ifndef offsetof /* XXX */ 140 #define offsetof(type, member) ((size_t)(&((type *)0)->member)) 141 #endif 142 143 /* 144 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 145 */ 146 147 DOMAIN_DEFINE(inet6domain); /* forward declare and add to link set */ 148 149 const struct ip6protosw inet6sw[] = { 150 { 0, &inet6domain, IPPROTO_IPV6, 0, 151 0, 0, 0, 0, 152 0, 153 ip6_init, 0, frag6_slowtimo, frag6_drain, 154 }, 155 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR|PR_PURGEIF, 156 udp6_input, 0, udp6_ctlinput, ip6_ctloutput, 157 udp6_usrreq, udp6_init, 158 0, 0, 0, 159 }, 160 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 161 tcp6_input, NULL, tcp6_ctlinput, tcp_ctloutput, 162 tcp_usrreq, 163 #ifdef INET /* don't call initialization and timeout routines twice */ 164 0, 0, 0, 0, 165 #else 166 tcp_init, 0, tcp_slowtimo, tcp_drain, 167 #endif 168 }, 169 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR|PR_PURGEIF, 170 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 171 rip6_usrreq, 172 0, 0, 0, 0, 173 }, 174 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 175 icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 176 rip6_usrreq, 177 icmp6_init, 0, 0, 0, 178 }, 179 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR, 180 dest6_input, 0, 0, 0, 181 0, 182 0, 0, 0, 0, 183 }, 184 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR, 185 route6_input, 0, 0, 0, 186 0, 187 0, 0, 0, 0, 188 }, 189 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR, 190 frag6_input, 0, 0, 0, 191 0, 192 0, 0, 0, 0, 193 }, 194 #ifdef IPSEC 195 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 196 ah6_input, 0, ah6_ctlinput, 0, 197 0, 198 0, 0, 0, 0, 199 }, 200 #ifdef IPSEC_ESP 201 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 202 esp6_input, 0, esp6_ctlinput, 0, 203 0, 204 0, 0, 0, 0, 205 }, 206 #endif 207 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 208 ipcomp6_input, 0, 0, 0, 209 0, 210 0, 0, 0, 0, 211 }, 212 #endif /* IPSEC */ 213 #ifdef FAST_IPSEC 214 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 215 ipsec6_common_input, 0, ah6_ctlinput, 0, 216 0, 217 0, 0, 0, 0, 218 }, 219 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 220 ipsec6_common_input, 0, esp6_ctlinput, 0, 221 0, 222 0, 0, 0, 0, 223 }, 224 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 225 ipsec6_common_input, 0, 0, 0, 226 0, 227 0, 0, 0, 0, 228 }, 229 #endif /* FAST_IPSEC */ 230 #ifdef INET 231 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 232 encap6_input, rip6_output, encap6_ctlinput, rip6_ctloutput, 233 rip6_usrreq, 234 encap_init, 0, 0, 0, 235 }, 236 #endif 237 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 238 encap6_input, rip6_output, encap6_ctlinput, rip6_ctloutput, 239 rip6_usrreq, 240 encap_init, 0, 0, 0, 241 }, 242 #if NETHERIP > 1 243 { SOCK_RAW, &inet6domain, IPPROTO_ETHERIP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 244 ip6_etherip_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 245 rip6_usrreq, 246 0, 0, 0, 0, 247 }, 248 #endif 249 #if NCARP > 0 250 { SOCK_RAW, &inet6domain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR, 251 carp6_proto_input, rip6_output, 0, rip6_ctloutput, 252 rip6_usrreq, 253 0, 0, 0, 0, 254 }, 255 #endif /* NCARP */ 256 #ifdef ISO 257 { SOCK_RAW, &inet6domain, IPPROTO_EON, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 258 encap6_input, rip6_output, encap6_ctlinput, rip6_ctloutput, 259 rip6_usrreq, /*XXX*/ 260 encap_init, 0, 0, 0, 261 }, 262 #endif 263 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 264 pim6_input, rip6_output, 0, rip6_ctloutput, 265 rip6_usrreq, 266 0, 0, 0, 0, 267 }, 268 /* raw wildcard */ 269 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 270 rip6_input, rip6_output, 0, rip6_ctloutput, 271 rip6_usrreq, 272 rip6_init, 0, 0, 0, 273 }, 274 }; 275 276 struct domain inet6domain = { 277 .dom_family = AF_INET6, .dom_name = "internet6", 278 .dom_init = NULL, .dom_externalize = NULL, .dom_dispose = NULL, 279 .dom_protosw = (const struct protosw *)inet6sw, 280 .dom_protoswNPROTOSW = (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 281 .dom_rtattach = rn_inithead, 282 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3, 283 .dom_maxrtkey = sizeof(struct sockaddr_in6), 284 .dom_ifattach = in6_domifattach, .dom_ifdetach = in6_domifdetach, 285 .dom_ifqueues = { &ip6intrq, NULL }, 286 .dom_link = { NULL }, 287 .dom_mowner = MOWNER_INIT("","") 288 }; 289 290 /* 291 * Internet configuration info 292 */ 293 #ifndef IPV6FORWARDING 294 #ifdef GATEWAY6 295 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 296 #else 297 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 298 #endif /* GATEWAY6 */ 299 #endif /* !IPV6FORWARDING */ 300 301 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 302 int ip6_sendredirects = 1; 303 int ip6_defhlim = IPV6_DEFHLIM; 304 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 305 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 306 int ip6_maxfragpackets = 200; 307 int ip6_maxfrags = 200; 308 int ip6_log_interval = 5; 309 int ip6_hdrnestlimit = 50; /* appropriate? */ 310 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 311 int ip6_auto_flowlabel = 1; 312 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 313 int ip6_rr_prune = 5; /* router renumbering prefix 314 * walk list every 5 sec. */ 315 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 316 int ip6_v6only = 1; 317 318 int ip6_keepfaith = 0; 319 time_t ip6_log_time = (time_t)0L; 320 321 /* icmp6 */ 322 /* 323 * BSDI4 defines these variables in in_proto.c... 324 * XXX: what if we don't define INET? Should we define pmtu6_expire 325 * or so? (jinmei (at) kame.net 19990310) 326 */ 327 int pmtu_expire = 60*10; 328 329 /* raw IP6 parameters */ 330 /* 331 * Nominal space allocated to a raw ip socket. 332 */ 333 #define RIPV6SNDQ 8192 334 #define RIPV6RCVQ 8192 335 336 u_long rip6_sendspace = RIPV6SNDQ; 337 u_long rip6_recvspace = RIPV6RCVQ; 338 339 /* ICMPV6 parameters */ 340 int icmp6_rediraccept = 1; /* accept and process redirects */ 341 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 342 int icmp6errppslim = 100; /* 100pps */ 343 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 344 345 /* UDP on IP6 parameters */ 346 int udp6_sendspace = 9216; /* really max datagram size */ 347 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 348 /* 40 1K datagrams */ 349
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