in6_proto.c revision 1.65
1 /* $NetBSD: in6_proto.c,v 1.65 2006/08/28 02:51:12 christos 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 1.65 2006/08/28 02:51:12 christos 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 #include "carp.h" 119 #if NCARP > 0 120 #include <netinet/ip_carp.h> 121 #endif 122 123 #include <netinet6/ip6protosw.h> 124 125 #include <net/net_osdep.h> 126 127 #ifndef offsetof /* XXX */ 128 #define offsetof(type, member) ((size_t)(&((type *)0)->member)) 129 #endif 130 131 /* 132 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 133 */ 134 135 DOMAIN_DEFINE(inet6domain); /* forward declare and add to link set */ 136 137 const struct ip6protosw inet6sw[] = { 138 { 0, &inet6domain, IPPROTO_IPV6, 0, 139 0, 0, 0, 0, 140 0, 141 ip6_init, 0, frag6_slowtimo, frag6_drain, 142 }, 143 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR|PR_PURGEIF, 144 udp6_input, 0, udp6_ctlinput, ip6_ctloutput, 145 udp6_usrreq, udp6_init, 146 0, 0, 0, 147 }, 148 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 149 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput, 150 tcp_usrreq, 151 #ifdef INET /* don't call initialization and timeout routines twice */ 152 0, 0, 0, 0, 153 #else 154 tcp_init, 0, tcp_slowtimo, tcp_drain, 155 #endif 156 }, 157 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR|PR_PURGEIF, 158 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 159 rip6_usrreq, 160 0, 0, 0, 0, 161 }, 162 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 163 icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 164 rip6_usrreq, 165 icmp6_init, 0, 0, 0, 166 }, 167 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR, 168 dest6_input, 0, 0, 0, 169 0, 170 0, 0, 0, 0, 171 }, 172 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR, 173 route6_input, 0, 0, 0, 174 0, 175 0, 0, 0, 0, 176 }, 177 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR, 178 frag6_input, 0, 0, 0, 179 0, 180 0, 0, 0, 0, 181 }, 182 #ifdef IPSEC 183 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 184 ah6_input, 0, ah6_ctlinput, 0, 185 0, 186 0, 0, 0, 0, 187 }, 188 #ifdef IPSEC_ESP 189 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 190 esp6_input, 0, esp6_ctlinput, 0, 191 0, 192 0, 0, 0, 0, 193 }, 194 #endif 195 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 196 ipcomp6_input, 0, 0, 0, 197 0, 198 0, 0, 0, 0, 199 }, 200 #endif /* IPSEC */ 201 #ifdef INET 202 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 203 encap6_input, rip6_output, encap6_ctlinput, rip6_ctloutput, 204 rip6_usrreq, 205 encap_init, 0, 0, 0, 206 }, 207 #endif 208 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 209 encap6_input, rip6_output, encap6_ctlinput, rip6_ctloutput, 210 rip6_usrreq, 211 encap_init, 0, 0, 0, 212 }, 213 #if NCARP > 0 214 { SOCK_RAW, &inet6domain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR, 215 carp6_proto_input, rip6_output, 0, rip6_ctloutput, 216 rip6_usrreq, 217 0, 0, 0, 0, 218 }, 219 #endif /* NCARP */ 220 #ifdef ISO 221 { SOCK_RAW, &inet6domain, IPPROTO_EON, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 222 encap6_input, rip6_output, encap6_ctlinput, rip6_ctloutput, 223 rip6_usrreq, /*XXX*/ 224 encap_init, 0, 0, 0, 225 }, 226 #endif 227 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 228 pim6_input, rip6_output, 0, rip6_ctloutput, 229 rip6_usrreq, 230 0, 0, 0, 0, 231 }, 232 /* raw wildcard */ 233 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 234 rip6_input, rip6_output, 0, rip6_ctloutput, 235 rip6_usrreq, 236 rip6_init, 0, 0, 0, 237 }, 238 }; 239 240 struct domain inet6domain = 241 { AF_INET6, "internet6", 0, 0, 0, 242 (const struct protosw *)inet6sw, 243 (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 244 rn_inithead, 245 offsetof(struct sockaddr_in6, sin6_addr) << 3, 246 sizeof(struct sockaddr_in6), 247 in6_domifattach, in6_domifdetach, { &ip6intrq } }; 248 249 /* 250 * Internet configuration info 251 */ 252 #ifndef IPV6FORWARDING 253 #ifdef GATEWAY6 254 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 255 #else 256 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 257 #endif /* GATEWAY6 */ 258 #endif /* !IPV6FORWARDING */ 259 260 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 261 int ip6_sendredirects = 1; 262 int ip6_defhlim = IPV6_DEFHLIM; 263 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 264 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 265 int ip6_maxfragpackets = 200; 266 int ip6_maxfrags = 200; 267 int ip6_log_interval = 5; 268 int ip6_hdrnestlimit = 50; /* appropriate? */ 269 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 270 int ip6_auto_flowlabel = 1; 271 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 272 int ip6_rr_prune = 5; /* router renumbering prefix 273 * walk list every 5 sec. */ 274 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 275 int ip6_v6only = 1; 276 277 int ip6_keepfaith = 0; 278 time_t ip6_log_time = (time_t)0L; 279 280 /* icmp6 */ 281 /* 282 * BSDI4 defines these variables in in_proto.c... 283 * XXX: what if we don't define INET? Should we define pmtu6_expire 284 * or so? (jinmei (at) kame.net 19990310) 285 */ 286 int pmtu_expire = 60*10; 287 288 /* raw IP6 parameters */ 289 /* 290 * Nominal space allocated to a raw ip socket. 291 */ 292 #define RIPV6SNDQ 8192 293 #define RIPV6RCVQ 8192 294 295 u_long rip6_sendspace = RIPV6SNDQ; 296 u_long rip6_recvspace = RIPV6RCVQ; 297 298 /* ICMPV6 parameters */ 299 int icmp6_rediraccept = 1; /* accept and process redirects */ 300 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 301 int icmp6errppslim = 100; /* 100pps */ 302 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 303 304 /* UDP on IP6 parameters */ 305 int udp6_sendspace = 9216; /* really max datagram size */ 306 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 307 /* 40 1K datagrams */ 308
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