in6_proto.c revision 1.29
1 /* $NetBSD: in6_proto.c,v 1.29 2001/03/21 19:22:28 thorpej 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 "opt_inet.h" 69 #include "opt_ipsec.h" 70 #include "opt_iso.h" 71 72 #include <sys/param.h> 73 #include <sys/socket.h> 74 #include <sys/protosw.h> 75 #include <sys/kernel.h> 76 #include <sys/domain.h> 77 #include <sys/mbuf.h> 78 79 #include <net/if.h> 80 #include <net/radix.h> 81 #include <net/route.h> 82 83 #include <netinet/in.h> 84 #include <netinet/in_systm.h> 85 #include <netinet/in_var.h> 86 #include <netinet/ip_encap.h> 87 #include <netinet/ip.h> 88 #include <netinet/ip_var.h> 89 #include <netinet/in_pcb.h> 90 #include <netinet/ip6.h> 91 #include <netinet6/ip6_var.h> 92 #include <netinet/icmp6.h> 93 #include <netinet6/in6_pcb.h> 94 95 #include <netinet/tcp.h> 96 #include <netinet/tcp_fsm.h> 97 #include <netinet/tcp_seq.h> 98 #include <netinet/tcp_timer.h> 99 #include <netinet/tcp_var.h> 100 #include <netinet/tcpip.h> 101 #include <netinet/tcp_debug.h> 102 103 #include <netinet6/udp6.h> 104 #include <netinet6/udp6_var.h> 105 106 #include <netinet6/pim6_var.h> 107 108 #include <netinet6/nd6.h> 109 110 111 #ifdef IPSEC 112 #include <netinet6/ipsec.h> 113 #include <netinet6/ah.h> 114 #ifdef IPSEC_ESP 115 #include <netinet6/esp.h> 116 #endif 117 #include <netinet6/ipcomp.h> 118 #endif /*IPSEC*/ 119 120 #include <netinet6/ip6protosw.h> 121 122 #include "gif.h" 123 #if NGIF > 0 124 #include <netinet6/in6_gif.h> 125 #endif 126 127 #include <net/net_osdep.h> 128 129 #define offsetof(type, member) ((size_t)(&((type *)0)->member)) 130 131 /* 132 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 133 */ 134 135 extern struct domain inet6domain; 136 137 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 ip6_sysctl, 143 }, 144 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 145 udp6_input, 0, udp6_ctlinput, ip6_ctloutput, 146 udp6_usrreq, udp6_init, 147 0, 0, 0, 148 udp6_sysctl, 149 }, 150 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS, 151 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput, 152 tcp_usrreq, 153 #ifdef INET /* don't call initialization and timeout routines twice */ 154 0, 0, 0, tcp_drain, 155 #else 156 tcp_init, tcp_fasttimo, tcp_slowtimo, tcp_drain, 157 #endif 158 tcp_sysctl, 159 }, 160 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 161 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 162 rip6_usrreq, 163 0, 0, 0, 0, 164 }, 165 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 166 icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 167 rip6_usrreq, 168 icmp6_init, icmp6_fasttimo, 0, 0, 169 icmp6_sysctl, 170 }, 171 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR, 172 dest6_input, 0, 0, 0, 173 0, 174 0, 0, 0, 0, 175 }, 176 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR, 177 route6_input, 0, 0, 0, 178 0, 179 0, 0, 0, 0, 180 }, 181 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR, 182 frag6_input, 0, 0, 0, 183 0, 184 0, 0, 0, 0, 185 }, 186 #ifdef IPSEC 187 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 188 ah6_input, 0, ah6_ctlinput, 0, 189 0, 190 0, 0, 0, 0, 191 ipsec6_sysctl, 192 }, 193 #ifdef IPSEC_ESP 194 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 195 esp6_input, 0, esp6_ctlinput, 0, 196 0, 197 0, 0, 0, 0, 198 ipsec6_sysctl, 199 }, 200 #endif 201 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 202 ipcomp6_input, 0, 0, 0, 203 0, 204 0, 0, 0, 0, 205 ipsec6_sysctl, 206 }, 207 #endif /* IPSEC */ 208 #ifdef INET 209 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 210 encap6_input, rip6_output, 0, rip6_ctloutput, 211 rip6_usrreq, 212 0, 0, 0, 0, 213 }, 214 #endif 215 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 216 encap6_input, rip6_output, 0, rip6_ctloutput, 217 rip6_usrreq, 218 #ifndef INET6 219 0, 0, 0, 0, 220 #else 221 encap_init, 0, 0, 0, 222 #endif 223 }, 224 #ifdef ISO 225 { SOCK_RAW, &inet6domain, IPPROTO_EON, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 226 encap6_input, rip6_output, 0, rip6_ctloutput, 227 rip6_usrreq, /*XXX*/ 228 0, 0, 0, 0, 229 }, 230 #endif 231 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 232 pim6_input, rip6_output, 0, rip6_ctloutput, 233 rip6_usrreq, 234 0, 0, 0, 0, 235 }, 236 /* raw wildcard */ 237 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR, 238 rip6_input, rip6_output, 0, rip6_ctloutput, 239 rip6_usrreq, 240 rip6_init, 0, 0, 0, 241 }, 242 }; 243 244 #if NGIF > 0 245 struct ip6protosw in6_gif_protosw = 246 { SOCK_RAW, &inet6domain, 0/*IPPROTO_IPV[46]*/, PR_ATOMIC|PR_ADDR, 247 in6_gif_input, rip6_output, 0, rip6_ctloutput, 248 rip6_usrreq, 249 0, 0, 0, 0, 250 }; 251 #endif /*NGIF*/ 252 253 struct domain inet6domain = 254 { AF_INET6, "internet6", 0, 0, 0, 255 (struct protosw *)inet6sw, 256 (struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 0, 257 rn_inithead, 258 offsetof(struct sockaddr_in6, sin6_addr) << 3, 259 sizeof(struct sockaddr_in6) }; 260 261 /* 262 * Internet configuration info 263 */ 264 #ifndef IPV6FORWARDING 265 #ifdef GATEWAY6 266 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 267 #else 268 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 269 #endif /* GATEWAY6 */ 270 #endif /* !IPV6FORWARDING */ 271 272 #ifndef IPV6_SENDREDIRECTS 273 #define IPV6_SENDREDIRECTS 1 274 #endif 275 276 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 277 int ip6_sendredirects = IPV6_SENDREDIRECTS; 278 int ip6_defhlim = IPV6_DEFHLIM; 279 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 280 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 281 int ip6_maxfragpackets = 200; 282 int ip6_log_interval = 5; 283 int ip6_hdrnestlimit = 50; /* appropriate? */ 284 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 285 u_int32_t ip6_flow_seq; 286 int ip6_auto_flowlabel = 1; 287 #if NGIF > 0 288 int ip6_gif_hlim = GIF_HLIM; 289 #else 290 int ip6_gif_hlim = 0; 291 #endif 292 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 293 int ip6_rr_prune = 5; /* router renumbering prefix 294 * walk list every 5 sec. */ 295 #ifndef INET6_BINDV6ONLY 296 int ip6_bindv6only = 1; 297 #endif 298 299 u_int32_t ip6_id = 0UL; 300 int ip6_keepfaith = 0; 301 time_t ip6_log_time = (time_t)0L; 302 303 /* icmp6 */ 304 /* 305 * BSDI4 defines these variables in in_proto.c... 306 * XXX: what if we don't define INET? Should we define pmtu6_expire 307 * or so? (jinmei (at) kame.net 19990310) 308 */ 309 int pmtu_expire = 60*10; 310 int pmtu_probe = 60*2; 311 312 /* raw IP6 parameters */ 313 /* 314 * Nominal space allocated to a raw ip socket. 315 */ 316 #define RIPV6SNDQ 8192 317 #define RIPV6RCVQ 8192 318 319 u_long rip6_sendspace = RIPV6SNDQ; 320 u_long rip6_recvspace = RIPV6RCVQ; 321 322 /* ICMPV6 parameters */ 323 int icmp6_rediraccept = 1; /* accept and process redirects */ 324 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 325 int icmp6errppslim = 100; /* 100pps */ 326 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 327 328 /* UDP on IP6 parameters */ 329 int udp6_sendspace = 9216; /* really max datagram size */ 330 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 331 /* 40 1K datagrams */ 332
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