in6_proto.c revision 1.61.4.2
1 /* $NetBSD: in6_proto.c,v 1.61.4.2 2006/09/09 02:58:55 rpaulo 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 1.61.4.2 2006/09/09 02:58:55 rpaulo 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 93 #include <netinet/tcp.h> 94 #include <netinet/tcp_fsm.h> 95 #include <netinet/tcp_seq.h> 96 #include <netinet/tcp_timer.h> 97 #include <netinet/tcp_var.h> 98 #include <netinet/tcpip.h> 99 #include <netinet/tcp_debug.h> 100 101 #include <netinet6/udp6.h> 102 #include <netinet6/udp6_var.h> 103 104 #include <netinet6/pim6_var.h> 105 106 #include <netinet6/nd6.h> 107 108 #ifdef IPSEC 109 #include <netinet6/ipsec.h> 110 #include <netinet6/ah.h> 111 #ifdef IPSEC_ESP 112 #include <netinet6/esp.h> 113 #endif 114 #include <netinet6/ipcomp.h> 115 #endif /* IPSEC */ 116 117 #include "carp.h" 118 #if NCARP > 0 119 #include <netinet/ip_carp.h> 120 #endif 121 122 #include <netinet6/ip6protosw.h> 123 124 #include <net/net_osdep.h> 125 126 #ifndef offsetof /* XXX */ 127 #define offsetof(type, member) ((size_t)(&((type *)0)->member)) 128 #endif 129 130 /* 131 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 132 */ 133 134 DOMAIN_DEFINE(inet6domain); /* forward declare and add to link set */ 135 136 const struct ip6protosw inet6sw[] = { 137 { 0, &inet6domain, IPPROTO_IPV6, 0, 138 0, 0, 0, 0, 139 0, 140 ip6_init, 0, frag6_slowtimo, frag6_drain, 141 }, 142 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR|PR_PURGEIF, 143 udp6_input, 0, udp6_ctlinput, ip6_ctloutput, 144 udp6_usrreq, udp6_init, 145 0, 0, 0, 146 }, 147 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 148 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput, 149 tcp_usrreq, 150 #ifdef INET /* don't call initialization and timeout routines twice */ 151 0, 0, 0, 0, 152 #else 153 tcp_init, 0, tcp_slowtimo, tcp_drain, 154 #endif 155 }, 156 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR|PR_PURGEIF, 157 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 158 rip6_usrreq, 159 0, 0, 0, 0, 160 }, 161 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 162 icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 163 rip6_usrreq, 164 icmp6_init, 0, 0, 0, 165 }, 166 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR, 167 dest6_input, 0, 0, 0, 168 0, 169 0, 0, 0, 0, 170 }, 171 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR, 172 route6_input, 0, 0, 0, 173 0, 174 0, 0, 0, 0, 175 }, 176 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR, 177 frag6_input, 0, 0, 0, 178 0, 179 0, 0, 0, 0, 180 }, 181 #ifdef IPSEC 182 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 183 ah6_input, 0, ah6_ctlinput, 0, 184 0, 185 0, 0, 0, 0, 186 }, 187 #ifdef IPSEC_ESP 188 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 189 esp6_input, 0, esp6_ctlinput, 0, 190 0, 191 0, 0, 0, 0, 192 }, 193 #endif 194 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 195 ipcomp6_input, 0, 0, 0, 196 0, 197 0, 0, 0, 0, 198 }, 199 #endif /* IPSEC */ 200 #ifdef INET 201 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 202 encap6_input, rip6_output, encap6_ctlinput, rip6_ctloutput, 203 rip6_usrreq, 204 encap_init, 0, 0, 0, 205 }, 206 #endif 207 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 208 encap6_input, rip6_output, encap6_ctlinput, rip6_ctloutput, 209 rip6_usrreq, 210 encap_init, 0, 0, 0, 211 }, 212 #if NCARP > 0 213 { SOCK_RAW, &inet6domain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR, 214 carp6_proto_input, rip6_output, 0, rip6_ctloutput, 215 rip6_usrreq, 216 0, 0, 0, 0, 217 }, 218 #endif /* NCARP */ 219 #ifdef ISO 220 { SOCK_RAW, &inet6domain, IPPROTO_EON, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 221 encap6_input, rip6_output, encap6_ctlinput, rip6_ctloutput, 222 rip6_usrreq, /*XXX*/ 223 encap_init, 0, 0, 0, 224 }, 225 #endif 226 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 227 pim6_input, rip6_output, 0, rip6_ctloutput, 228 rip6_usrreq, 229 0, 0, 0, 0, 230 }, 231 /* raw wildcard */ 232 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 233 rip6_input, rip6_output, 0, rip6_ctloutput, 234 rip6_usrreq, 235 rip6_init, 0, 0, 0, 236 }, 237 }; 238 239 struct domain inet6domain = { 240 AF_INET6, "internet6", NULL, NULL, NULL, 241 (const struct protosw *)inet6sw, 242 (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 243 rn_inithead, 244 offsetof(struct sockaddr_in6, sin6_addr) << 3, 245 sizeof(struct sockaddr_in6), 246 in6_domifattach, in6_domifdetach, 247 { &ip6intrq, NULL }, 248 { NULL }, 249 MOWNER_INIT 250 }; 251 252 /* 253 * Internet configuration info 254 */ 255 #ifndef IPV6FORWARDING 256 #ifdef GATEWAY6 257 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 258 #else 259 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 260 #endif /* GATEWAY6 */ 261 #endif /* !IPV6FORWARDING */ 262 263 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 264 int ip6_sendredirects = 1; 265 int ip6_defhlim = IPV6_DEFHLIM; 266 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 267 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 268 int ip6_maxfragpackets = 200; 269 int ip6_maxfrags = 200; 270 int ip6_log_interval = 5; 271 int ip6_hdrnestlimit = 50; /* appropriate? */ 272 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 273 int ip6_auto_flowlabel = 1; 274 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 275 int ip6_rr_prune = 5; /* router renumbering prefix 276 * walk list every 5 sec. */ 277 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 278 int ip6_v6only = 1; 279 280 int ip6_keepfaith = 0; 281 time_t ip6_log_time = (time_t)0L; 282 283 /* icmp6 */ 284 /* 285 * BSDI4 defines these variables in in_proto.c... 286 * XXX: what if we don't define INET? Should we define pmtu6_expire 287 * or so? (jinmei (at) kame.net 19990310) 288 */ 289 int pmtu_expire = 60*10; 290 291 /* raw IP6 parameters */ 292 /* 293 * Nominal space allocated to a raw ip socket. 294 */ 295 #define RIPV6SNDQ 8192 296 #define RIPV6RCVQ 8192 297 298 u_long rip6_sendspace = RIPV6SNDQ; 299 u_long rip6_recvspace = RIPV6RCVQ; 300 301 /* ICMPV6 parameters */ 302 int icmp6_rediraccept = 1; /* accept and process redirects */ 303 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 304 int icmp6errppslim = 100; /* 100pps */ 305 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 306 307 /* UDP on IP6 parameters */ 308 int udp6_sendspace = 9216; /* really max datagram size */ 309 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 310 /* 40 1K datagrams */ 311
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