in6_proto.c revision 1.35
1 /* $NetBSD: in6_proto.c,v 1.35 2001/12/21 03:21:51 itojun 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. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93 66 */ 67 68 #include <sys/cdefs.h> 69 __KERNEL_RCSID(0, "$NetBSD: in6_proto.c,v 1.35 2001/12/21 03:21:51 itojun Exp $"); 70 71 #include "opt_inet.h" 72 #include "opt_ipsec.h" 73 #include "opt_iso.h" 74 75 #include <sys/param.h> 76 #include <sys/socket.h> 77 #include <sys/protosw.h> 78 #include <sys/kernel.h> 79 #include <sys/domain.h> 80 #include <sys/mbuf.h> 81 82 #include <net/if.h> 83 #include <net/radix.h> 84 #include <net/route.h> 85 86 #include <netinet/in.h> 87 #include <netinet/in_systm.h> 88 #include <netinet/in_var.h> 89 #include <netinet/ip_encap.h> 90 #include <netinet/ip.h> 91 #include <netinet/ip_var.h> 92 #include <netinet/in_pcb.h> 93 #include <netinet/ip6.h> 94 #include <netinet6/ip6_var.h> 95 #include <netinet/icmp6.h> 96 #include <netinet6/in6_pcb.h> 97 98 #include <netinet/tcp.h> 99 #include <netinet/tcp_fsm.h> 100 #include <netinet/tcp_seq.h> 101 #include <netinet/tcp_timer.h> 102 #include <netinet/tcp_var.h> 103 #include <netinet/tcpip.h> 104 #include <netinet/tcp_debug.h> 105 106 #include <netinet6/udp6.h> 107 #include <netinet6/udp6_var.h> 108 109 #include <netinet6/pim6_var.h> 110 111 #include <netinet6/nd6.h> 112 113 #ifdef IPSEC 114 #include <netinet6/ipsec.h> 115 #include <netinet6/ah.h> 116 #ifdef IPSEC_ESP 117 #include <netinet6/esp.h> 118 #endif 119 #include <netinet6/ipcomp.h> 120 #endif /* IPSEC */ 121 122 #include <netinet6/ip6protosw.h> 123 124 #include <net/net_osdep.h> 125 126 #include "gif.h" 127 #if NGIF > 0 128 #include <netinet6/in6_gif.h> 129 #endif 130 131 #define offsetof(type, member) ((size_t)(&((type *)0)->member)) 132 133 /* 134 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 135 */ 136 137 extern struct domain inet6domain; 138 139 struct ip6protosw inet6sw[] = { 140 { 0, &inet6domain, IPPROTO_IPV6, 0, 141 0, 0, 0, 0, 142 0, 143 ip6_init, 0, frag6_slowtimo, frag6_drain, 144 ip6_sysctl, 145 }, 146 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 147 udp6_input, 0, udp6_ctlinput, ip6_ctloutput, 148 udp6_usrreq, udp6_init, 149 0, 0, 0, 150 udp6_sysctl, 151 }, 152 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS, 153 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput, 154 tcp_usrreq, 155 #ifdef INET /* don't call initialization and timeout routines twice */ 156 0, 0, 0, tcp_drain, 157 #else 158 tcp_init, 0, tcp_slowtimo, tcp_drain, 159 #endif 160 tcp_sysctl, 161 }, 162 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 163 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 164 rip6_usrreq, 165 0, 0, 0, 0, 166 }, 167 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 168 icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 169 rip6_usrreq, 170 icmp6_init, icmp6_fasttimo, 0, 0, 171 icmp6_sysctl, 172 }, 173 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR, 174 dest6_input, 0, 0, 0, 175 0, 176 0, 0, 0, 0, 177 }, 178 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR, 179 route6_input, 0, 0, 0, 180 0, 181 0, 0, 0, 0, 182 }, 183 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR, 184 frag6_input, 0, 0, 0, 185 0, 186 0, 0, 0, 0, 187 }, 188 #ifdef IPSEC 189 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 190 ah6_input, 0, ah6_ctlinput, 0, 191 0, 192 0, 0, 0, 0, 193 ipsec6_sysctl, 194 }, 195 #ifdef IPSEC_ESP 196 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 197 esp6_input, 0, esp6_ctlinput, 0, 198 0, 199 0, 0, 0, 0, 200 ipsec6_sysctl, 201 }, 202 #endif 203 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 204 ipcomp6_input, 0, 0, 0, 205 0, 206 0, 0, 0, 0, 207 ipsec6_sysctl, 208 }, 209 #endif /* IPSEC */ 210 #ifdef INET 211 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 212 encap6_input, rip6_output, 0, rip6_ctloutput, 213 rip6_usrreq, 214 0, 0, 0, 0, 215 }, 216 #endif 217 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 218 encap6_input, rip6_output, 0, rip6_ctloutput, 219 rip6_usrreq, 220 #ifndef INET6 221 0, 0, 0, 0, 222 #else 223 encap_init, 0, 0, 0, 224 #endif 225 }, 226 #ifdef ISO 227 { SOCK_RAW, &inet6domain, IPPROTO_EON, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 228 encap6_input, rip6_output, 0, rip6_ctloutput, 229 rip6_usrreq, /*XXX*/ 230 0, 0, 0, 0, 231 }, 232 #endif 233 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 234 pim6_input, rip6_output, 0, rip6_ctloutput, 235 rip6_usrreq, 236 0, 0, 0, 0, 237 }, 238 /* raw wildcard */ 239 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR, 240 rip6_input, rip6_output, 0, rip6_ctloutput, 241 rip6_usrreq, 242 rip6_init, 0, 0, 0, 243 }, 244 }; 245 246 struct domain inet6domain = 247 { AF_INET6, "internet6", 0, 0, 0, 248 (struct protosw *)inet6sw, 249 (struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 0, 250 rn_inithead, 251 offsetof(struct sockaddr_in6, sin6_addr) << 3, 252 sizeof(struct sockaddr_in6) }; 253 254 /* 255 * Internet configuration info 256 */ 257 #ifndef IPV6FORWARDING 258 #ifdef GATEWAY6 259 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 260 #else 261 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 262 #endif /* GATEWAY6 */ 263 #endif /* !IPV6FORWARDING */ 264 265 #ifndef IPV6_SENDREDIRECTS 266 #define IPV6_SENDREDIRECTS 1 267 #endif 268 269 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 270 int ip6_sendredirects = IPV6_SENDREDIRECTS; 271 int ip6_defhlim = IPV6_DEFHLIM; 272 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 273 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 274 int ip6_maxfragpackets = 200; 275 int ip6_log_interval = 5; 276 int ip6_hdrnestlimit = 50; /* appropriate? */ 277 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 278 u_int32_t ip6_flow_seq; 279 int ip6_auto_flowlabel = 1; 280 int ip6_gif_hlim = GIF_HLIM; 281 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 282 int ip6_rr_prune = 5; /* router renumbering prefix 283 * walk list every 5 sec. */ 284 int ip6_v6only = 1; 285 286 u_int32_t ip6_id = 0UL; 287 int ip6_keepfaith = 0; 288 time_t ip6_log_time = (time_t)0L; 289 290 /* icmp6 */ 291 /* 292 * BSDI4 defines these variables in in_proto.c... 293 * XXX: what if we don't define INET? Should we define pmtu6_expire 294 * or so? (jinmei (at) kame.net 19990310) 295 */ 296 int pmtu_expire = 60*10; 297 int pmtu_probe = 60*2; 298 299 /* raw IP6 parameters */ 300 /* 301 * Nominal space allocated to a raw ip socket. 302 */ 303 #define RIPV6SNDQ 8192 304 #define RIPV6RCVQ 8192 305 306 u_long rip6_sendspace = RIPV6SNDQ; 307 u_long rip6_recvspace = RIPV6RCVQ; 308 309 /* ICMPV6 parameters */ 310 int icmp6_rediraccept = 1; /* accept and process redirects */ 311 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 312 int icmp6errppslim = 100; /* 100pps */ 313 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 314 315 /* UDP on IP6 parameters */ 316 int udp6_sendspace = 9216; /* really max datagram size */ 317 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 318 /* 40 1K datagrams */ 319
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