in6_proto.c revision 1.24
1 /* $NetBSD: in6_proto.c,v 1.24 2001/02/11 05:25:04 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 "opt_inet.h" 69 #include "opt_ipsec.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> 108 109 110 #ifdef IPSEC 111 #include <netinet6/ipsec.h> 112 #include <netinet6/ah.h> 113 #ifdef IPSEC_ESP 114 #include <netinet6/esp.h> 115 #endif 116 #include <netinet6/ipcomp.h> 117 #endif /*IPSEC*/ 118 119 #include <netinet6/ip6protosw.h> 120 121 #include "gif.h" 122 #if NGIF > 0 123 #include <netinet6/in6_gif.h> 124 #endif 125 126 #include <net/net_osdep.h> 127 128 #define offsetof(type, member) ((size_t)(&((type *)0)->member)) 129 130 /* 131 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 132 */ 133 134 extern struct domain inet6domain; 135 136 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 ip6_sysctl, 142 }, 143 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC | PR_ADDR, 144 udp6_input, 0, udp6_ctlinput, ip6_ctloutput, 145 udp6_usrreq, udp6_init, 146 0, 0, 0, 147 udp6_sysctl, 148 }, 149 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN, 150 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput, 151 tcp_usrreq, 152 #ifdef INET /* don't call initialization and timeout routines twice */ 153 0, 0, 0, tcp_drain, 154 #else 155 tcp_init, tcp_fasttimo, tcp_slowtimo, tcp_drain, 156 #endif 157 tcp_sysctl, 158 }, 159 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC | PR_ADDR, 160 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 161 rip6_usrreq, 162 0, 0, 0, 0, 163 }, 164 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC | PR_ADDR, 165 icmp6_input, rip6_output, 0, rip6_ctloutput, 166 rip6_usrreq, 167 icmp6_init, icmp6_fasttimo, 0, 0, 168 icmp6_sysctl, 169 }, 170 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR, 171 dest6_input, 0, 0, 0, 172 0, 173 0, 0, 0, 0, 174 }, 175 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR, 176 route6_input, 0, 0, 0, 177 0, 178 0, 0, 0, 0, 179 }, 180 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR, 181 frag6_input, 0, 0, 0, 182 0, 183 0, 0, 0, 0, 184 }, 185 #ifdef IPSEC 186 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 187 ah6_input, 0, ah6_ctlinput, 0, 188 0, 189 0, 0, 0, 0, 190 ipsec6_sysctl, 191 }, 192 #ifdef IPSEC_ESP 193 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 194 esp6_input, 0, esp6_ctlinput, 0, 195 0, 196 0, 0, 0, 0, 197 ipsec6_sysctl, 198 }, 199 #endif 200 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 201 ipcomp6_input, 0, 0, 0, 202 0, 203 0, 0, 0, 0, 204 ipsec6_sysctl, 205 }, 206 #endif /* IPSEC */ 207 #ifdef INET 208 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR, 209 encap6_input, rip6_output, 0, rip6_ctloutput, 210 rip6_usrreq, 211 0, 0, 0, 0, 212 }, 213 #endif 214 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR, 215 encap6_input, rip6_output, 0, rip6_ctloutput, 216 rip6_usrreq, 217 #ifndef INET6 218 0, 0, 0, 0, 219 #else 220 encap_init, 0, 0, 0, 221 #endif 222 }, 223 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR, 224 pim6_input, rip6_output, 0, rip6_ctloutput, 225 rip6_usrreq, 226 0, 0, 0, 0, 227 }, 228 /* raw wildcard */ 229 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC | PR_ADDR, 230 rip6_input, rip6_output, 0, rip6_ctloutput, 231 rip6_usrreq, 232 rip6_init, 0, 0, 0, 233 }, 234 }; 235 236 #if NGIF > 0 237 struct ip6protosw in6_gif_protosw = 238 { SOCK_RAW, &inet6domain, 0/*IPPROTO_IPV[46]*/, PR_ATOMIC|PR_ADDR, 239 in6_gif_input, rip6_output, 0, rip6_ctloutput, 240 rip6_usrreq, 241 0, 0, 0, 0, 242 }; 243 #endif /*NGIF*/ 244 245 struct domain inet6domain = 246 { AF_INET6, "internet6", 0, 0, 0, 247 (struct protosw *)inet6sw, 248 (struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 0, 249 rn_inithead, 250 offsetof(struct sockaddr_in6, sin6_addr) << 3, 251 sizeof(struct sockaddr_in6) }; 252 253 /* 254 * Internet configuration info 255 */ 256 #ifndef IPV6FORWARDING 257 #ifdef GATEWAY6 258 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 259 #else 260 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 261 #endif /* GATEWAY6 */ 262 #endif /* !IPV6FORWARDING */ 263 264 #ifndef IPV6_SENDREDIRECTS 265 #define IPV6_SENDREDIRECTS 1 266 #endif 267 268 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 269 int ip6_sendredirects = IPV6_SENDREDIRECTS; 270 int ip6_defhlim = IPV6_DEFHLIM; 271 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 272 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 273 int ip6_maxfragpackets = 200; 274 int ip6_log_interval = 5; 275 int ip6_hdrnestlimit = 50; /* appropriate? */ 276 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 277 u_int32_t ip6_flow_seq; 278 int ip6_auto_flowlabel = 1; 279 #if NGIF > 0 280 int ip6_gif_hlim = GIF_HLIM; 281 #else 282 int ip6_gif_hlim = 0; 283 #endif 284 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 285 int ip6_rr_prune = 5; /* router renumbering prefix 286 * walk list every 5 sec. */ 287 #ifndef INET6_BINDV6ONLY 288 int ip6_bindv6only = 1; 289 #endif 290 291 u_int32_t ip6_id = 0UL; 292 int ip6_keepfaith = 0; 293 time_t ip6_log_time = (time_t)0L; 294 295 /* icmp6 */ 296 /* 297 * BSDI4 defines these variables in in_proto.c... 298 * XXX: what if we don't define INET? Should we define pmtu6_expire 299 * or so? (jinmei (at) kame.net 19990310) 300 */ 301 int pmtu_expire = 60*10; 302 int pmtu_probe = 60*2; 303 304 /* raw IP6 parameters */ 305 /* 306 * Nominal space allocated to a raw ip socket. 307 */ 308 #define RIPV6SNDQ 8192 309 #define RIPV6RCVQ 8192 310 311 u_long rip6_sendspace = RIPV6SNDQ; 312 u_long rip6_recvspace = RIPV6RCVQ; 313 314 /* ICMPV6 parameters */ 315 int icmp6_rediraccept = 1; /* accept and process redirects */ 316 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 317 int icmp6errppslim = 100; /* 100pps */ 318 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 319 320 /* UDP on IP6 parameters */ 321 int udp6_sendspace = 9216; /* really max datagram size */ 322 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 323 /* 40 1K datagrams */ 324
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