in6_proto.c revision 1.62
1 /* $NetBSD: in6_proto.c,v 1.62 2006/03/05 23:47:08 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 1.62 2006/03/05 23:47:08 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 #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 <netinet6/ip6protosw.h> 119 120 #include <net/net_osdep.h> 121 122 #ifndef offsetof /* XXX */ 123 #define offsetof(type, member) ((size_t)(&((type *)0)->member)) 124 #endif 125 126 /* 127 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 128 */ 129 130 DOMAIN_DEFINE(inet6domain); /* forward declare and add to link set */ 131 132 const struct ip6protosw inet6sw[] = { 133 { 0, &inet6domain, IPPROTO_IPV6, 0, 134 0, 0, 0, 0, 135 0, 136 ip6_init, 0, frag6_slowtimo, frag6_drain, 137 NULL, 138 }, 139 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR|PR_PURGEIF, 140 udp6_input, 0, udp6_ctlinput, ip6_ctloutput, 141 udp6_usrreq, udp6_init, 142 0, 0, 0, 143 NULL, 144 }, 145 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 146 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput, 147 tcp_usrreq, 148 #ifdef INET /* don't call initialization and timeout routines twice */ 149 0, 0, 0, 0, 150 #else 151 tcp_init, 0, tcp_slowtimo, tcp_drain, 152 #endif 153 NULL, 154 }, 155 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR|PR_PURGEIF, 156 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 157 rip6_usrreq, 158 0, 0, 0, 0, 159 }, 160 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 161 icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 162 rip6_usrreq, 163 icmp6_init, 0, 0, 0, 164 }, 165 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR, 166 dest6_input, 0, 0, 0, 167 0, 168 0, 0, 0, 0, 169 }, 170 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR, 171 route6_input, 0, 0, 0, 172 0, 173 0, 0, 0, 0, 174 }, 175 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR, 176 frag6_input, 0, 0, 0, 177 0, 178 0, 0, 0, 0, 179 }, 180 #ifdef IPSEC 181 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 182 ah6_input, 0, ah6_ctlinput, 0, 183 0, 184 0, 0, 0, 0, 185 NULL, 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 NULL, 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 NULL, 200 }, 201 #endif /* IPSEC */ 202 #ifdef INET 203 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 204 encap6_input, rip6_output, encap6_ctlinput, rip6_ctloutput, 205 rip6_usrreq, 206 encap_init, 0, 0, 0, 207 }, 208 #endif 209 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 210 encap6_input, rip6_output, encap6_ctlinput, rip6_ctloutput, 211 rip6_usrreq, 212 encap_init, 0, 0, 0, 213 }, 214 #ifdef ISO 215 { SOCK_RAW, &inet6domain, IPPROTO_EON, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 216 encap6_input, rip6_output, encap6_ctlinput, rip6_ctloutput, 217 rip6_usrreq, /*XXX*/ 218 encap_init, 0, 0, 0, 219 }, 220 #endif 221 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 222 pim6_input, rip6_output, 0, rip6_ctloutput, 223 rip6_usrreq, 224 0, 0, 0, 0, 225 }, 226 /* raw wildcard */ 227 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 228 rip6_input, rip6_output, 0, rip6_ctloutput, 229 rip6_usrreq, 230 rip6_init, 0, 0, 0, 231 }, 232 }; 233 234 struct domain inet6domain = 235 { AF_INET6, "internet6", 0, 0, 0, 236 (const struct protosw *)inet6sw, 237 (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 238 rn_inithead, 239 offsetof(struct sockaddr_in6, sin6_addr) << 3, 240 sizeof(struct sockaddr_in6), 241 in6_domifattach, in6_domifdetach, }; 242 243 /* 244 * Internet configuration info 245 */ 246 #ifndef IPV6FORWARDING 247 #ifdef GATEWAY6 248 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 249 #else 250 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 251 #endif /* GATEWAY6 */ 252 #endif /* !IPV6FORWARDING */ 253 254 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 255 int ip6_sendredirects = 1; 256 int ip6_defhlim = IPV6_DEFHLIM; 257 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 258 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 259 int ip6_maxfragpackets = 200; 260 int ip6_maxfrags = 200; 261 int ip6_log_interval = 5; 262 int ip6_hdrnestlimit = 50; /* appropriate? */ 263 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 264 int ip6_auto_flowlabel = 1; 265 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 266 int ip6_rr_prune = 5; /* router renumbering prefix 267 * walk list every 5 sec. */ 268 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 269 int ip6_v6only = 1; 270 271 int ip6_keepfaith = 0; 272 time_t ip6_log_time = (time_t)0L; 273 274 /* icmp6 */ 275 /* 276 * BSDI4 defines these variables in in_proto.c... 277 * XXX: what if we don't define INET? Should we define pmtu6_expire 278 * or so? (jinmei (at) kame.net 19990310) 279 */ 280 int pmtu_expire = 60*10; 281 282 /* raw IP6 parameters */ 283 /* 284 * Nominal space allocated to a raw ip socket. 285 */ 286 #define RIPV6SNDQ 8192 287 #define RIPV6RCVQ 8192 288 289 u_long rip6_sendspace = RIPV6SNDQ; 290 u_long rip6_recvspace = RIPV6RCVQ; 291 292 /* ICMPV6 parameters */ 293 int icmp6_rediraccept = 1; /* accept and process redirects */ 294 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 295 int icmp6errppslim = 100; /* 100pps */ 296 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 297 298 /* UDP on IP6 parameters */ 299 int udp6_sendspace = 9216; /* really max datagram size */ 300 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 301 /* 40 1K datagrams */ 302
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