in6_proto.c revision 1.21
1 /* $NetBSD: in6_proto.c,v 1.21 2000/10/10 16:26:44 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 #ifndef TCP6 87 #include <netinet/ip.h> 88 #include <netinet/ip_var.h> 89 #endif 90 #ifndef TCP6 91 #include <netinet/in_pcb.h> 92 #endif 93 #include <netinet/ip6.h> 94 #include <netinet6/ip6_var.h> 95 #include <netinet/icmp6.h> 96 #include <netinet6/in6_pcb.h> 97 98 #ifndef TCP6 99 #include <netinet/tcp.h> 100 #include <netinet/tcp_fsm.h> 101 #include <netinet/tcp_seq.h> 102 #include <netinet/tcp_timer.h> 103 #include <netinet/tcp_var.h> 104 #include <netinet/tcpip.h> 105 #include <netinet/tcp_debug.h> 106 #else 107 #include <netinet6/tcp6.h> 108 #include <netinet6/tcp6_fsm.h> 109 #include <netinet6/tcp6_seq.h> 110 #include <netinet6/tcp6_timer.h> 111 #include <netinet6/tcp6_var.h> 112 #endif 113 114 #include <netinet6/udp6.h> 115 #include <netinet6/udp6_var.h> 116 117 #include <netinet6/pim6_var.h> 118 119 #include <netinet6/nd6.h> 120 121 122 #ifdef IPSEC 123 #include <netinet6/ipsec.h> 124 #include <netinet6/ah.h> 125 #ifdef IPSEC_ESP 126 #include <netinet6/esp.h> 127 #endif 128 #include <netinet6/ipcomp.h> 129 #endif /*IPSEC*/ 130 131 #include <netinet6/ip6protosw.h> 132 133 #include "gif.h" 134 #if NGIF > 0 135 #include <netinet6/in6_gif.h> 136 #endif 137 138 #include <net/net_osdep.h> 139 140 #define offsetof(type, member) ((size_t)(&((type *)0)->member)) 141 142 /* 143 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 144 */ 145 146 extern struct domain inet6domain; 147 148 struct ip6protosw inet6sw[] = { 149 { 0, &inet6domain, IPPROTO_IPV6, 0, 150 0, 0, 0, 0, 151 0, 152 ip6_init, 0, frag6_slowtimo, frag6_drain, 153 ip6_sysctl, 154 }, 155 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC | PR_ADDR, 156 udp6_input, 0, udp6_ctlinput, ip6_ctloutput, 157 udp6_usrreq, udp6_init, 158 0, 0, 0, 159 udp6_sysctl, 160 }, 161 #ifdef TCP6 162 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN, 163 tcp6_input, 0, tcp6_ctlinput, tcp6_ctloutput, 164 tcp6_usrreq, 165 tcp6_init, tcp6_fasttimo, tcp6_slowtimo, tcp6_drain, 166 tcp6_sysctl, 167 }, 168 #else 169 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN, 170 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput, 171 tcp_usrreq, 172 #ifdef INET /* don't call initialization and timeout routines twice */ 173 0, 0, 0, tcp_drain, 174 #else 175 tcp_init, tcp_fasttimo, tcp_slowtimo, tcp_drain, 176 #endif 177 tcp_sysctl, 178 }, 179 #endif /*TCP6*/ 180 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC | PR_ADDR, 181 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 182 rip6_usrreq, 183 0, 0, 0, 0, 184 }, 185 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC | PR_ADDR, 186 icmp6_input, rip6_output, 0, rip6_ctloutput, 187 rip6_usrreq, 188 icmp6_init, icmp6_fasttimo, 0, 0, 189 icmp6_sysctl, 190 }, 191 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR, 192 dest6_input, 0, 0, 0, 193 0, 194 0, 0, 0, 0, 195 }, 196 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR, 197 route6_input, 0, 0, 0, 198 0, 199 0, 0, 0, 0, 200 }, 201 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR, 202 frag6_input, 0, 0, 0, 203 0, 204 0, 0, 0, 0, 205 }, 206 #ifdef IPSEC 207 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 208 ah6_input, 0, 0, 0, 209 0, 210 0, 0, 0, 0, 211 ipsec6_sysctl, 212 }, 213 #ifdef IPSEC_ESP 214 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 215 esp6_input, 0, 0, 0, 216 0, 217 0, 0, 0, 0, 218 ipsec6_sysctl, 219 }, 220 #endif 221 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 222 ipcomp6_input, 0, 0, 0, 223 0, 224 0, 0, 0, 0, 225 ipsec6_sysctl, 226 }, 227 #endif /* IPSEC */ 228 #ifdef INET 229 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR, 230 encap6_input, rip6_output, 0, rip6_ctloutput, 231 rip6_usrreq, 232 0, 0, 0, 0, 233 }, 234 #endif 235 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR, 236 encap6_input, rip6_output, 0, rip6_ctloutput, 237 rip6_usrreq, 238 #ifndef INET6 239 0, 0, 0, 0, 240 #else 241 encap_init, 0, 0, 0, 242 #endif 243 }, 244 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR, 245 pim6_input, rip6_output, 0, rip6_ctloutput, 246 rip6_usrreq, 247 0, 0, 0, 0, 248 }, 249 /* raw wildcard */ 250 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC | PR_ADDR, 251 rip6_input, rip6_output, 0, rip6_ctloutput, 252 rip6_usrreq, 253 rip6_init, 0, 0, 0, 254 }, 255 }; 256 257 #if NGIF > 0 258 struct ip6protosw in6_gif_protosw = 259 { SOCK_RAW, &inet6domain, 0/*IPPROTO_IPV[46]*/, PR_ATOMIC|PR_ADDR, 260 in6_gif_input, rip6_output, 0, rip6_ctloutput, 261 rip6_usrreq, 262 0, 0, 0, 0, 263 }; 264 #endif /*NGIF*/ 265 266 struct domain inet6domain = 267 { AF_INET6, "internet6", 0, 0, 0, 268 (struct protosw *)inet6sw, 269 (struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 0, 270 rn_inithead, 271 offsetof(struct sockaddr_in6, sin6_addr) << 3, 272 sizeof(struct sockaddr_in6) }; 273 274 /* 275 * Internet configuration info 276 */ 277 #ifndef IPV6FORWARDING 278 #ifdef GATEWAY6 279 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 280 #else 281 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 282 #endif /* GATEWAY6 */ 283 #endif /* !IPV6FORWARDING */ 284 285 #ifndef IPV6_SENDREDIRECTS 286 #define IPV6_SENDREDIRECTS 1 287 #endif 288 289 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 290 int ip6_sendredirects = IPV6_SENDREDIRECTS; 291 int ip6_defhlim = IPV6_DEFHLIM; 292 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 293 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 294 int ip6_maxfragpackets = 200; 295 int ip6_log_interval = 5; 296 int ip6_hdrnestlimit = 50; /* appropriate? */ 297 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 298 u_int32_t ip6_flow_seq; 299 int ip6_auto_flowlabel = 1; 300 #if NGIF > 0 301 int ip6_gif_hlim = GIF_HLIM; 302 #else 303 int ip6_gif_hlim = 0; 304 #endif 305 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 306 int ip6_rr_prune = 5; /* router renumbering prefix 307 * walk list every 5 sec. */ 308 #ifndef INET6_BINDV6ONLY 309 int ip6_bindv6only = 1; 310 #endif 311 312 u_int32_t ip6_id = 0UL; 313 int ip6_keepfaith = 0; 314 time_t ip6_log_time = (time_t)0L; 315 316 /* icmp6 */ 317 /* 318 * BSDI4 defines these variables in in_proto.c... 319 * XXX: what if we don't define INET? Should we define pmtu6_expire 320 * or so? (jinmei (at) kame.net 19990310) 321 */ 322 int pmtu_expire = 60*10; 323 int pmtu_probe = 60*2; 324 325 /* raw IP6 parameters */ 326 /* 327 * Nominal space allocated to a raw ip socket. 328 */ 329 #define RIPV6SNDQ 8192 330 #define RIPV6RCVQ 8192 331 332 u_long rip6_sendspace = RIPV6SNDQ; 333 u_long rip6_recvspace = RIPV6RCVQ; 334 335 /* ICMPV6 parameters */ 336 int icmp6_rediraccept = 1; /* accept and process redirects */ 337 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 338 int icmp6errppslim = 100; /* 100pps */ 339 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 340 341 #ifdef TCP6 342 /* TCP on IP6 parameters */ 343 int tcp6_sendspace = 1024 * 8; 344 int tcp6_recvspace = 1024 * 8; 345 int tcp6_mssdflt = TCP6_MSS; 346 int tcp6_rttdflt = TCP6TV_SRTTDFLT / PR_SLOWHZ; 347 int tcp6_do_rfc1323 = 1; 348 int tcp6_conntimeo = TCP6TV_KEEP_INIT; /* initial connection timeout */ 349 int tcp6_43maxseg = 0; 350 int tcp6_pmtu = 0; 351 352 /* 353 * Parameters for keepalive option. 354 * Connections for which SO_KEEPALIVE is set will be probed 355 * after being idle for a time of tcp6_keepidle (in units of PR_SLOWHZ). 356 * Starting at that time, the connection is probed at intervals 357 * of tcp6_keepintvl (same units) until a response is received 358 * or until tcp6_keepcnt probes have been made, at which time 359 * the connection is dropped. Note that a tcp6_keepidle value 360 * under 2 hours is nonconformant with RFC-1122, Internet Host Requirements. 361 */ 362 int tcp6_keepidle = TCP6TV_KEEP_IDLE; /* time before probing idle */ 363 int tcp6_keepintvl = TCP6TV_KEEPINTVL; /* interval betwn idle probes */ 364 int tcp6_keepcnt = TCP6TV_KEEPCNT; /* max idle probes */ 365 int tcp6_maxpersistidle = TCP6TV_KEEP_IDLE; /* max idle time in persist */ 366 367 #ifndef INET_SERVER 368 #define TCP6_LISTEN_HASH_SIZE 17 369 #define TCP6_CONN_HASH_SIZE 97 370 #define TCP6_SYN_HASH_SIZE 293 371 #define TCP6_SYN_BUCKET_SIZE 35 372 #else 373 #define TCP6_LISTEN_HASH_SIZE 97 374 #define TCP6_CONN_HASH_SIZE 9973 375 #define TCP6_SYN_HASH_SIZE 997 376 #define TCP6_SYN_BUCKET_SIZE 35 377 #endif 378 int tcp6_listen_hash_size = TCP6_LISTEN_HASH_SIZE; 379 int tcp6_conn_hash_size = TCP6_CONN_HASH_SIZE; 380 struct tcp6_hash_list tcp6_listen_hash[TCP6_LISTEN_HASH_SIZE], 381 tcp6_conn_hash[TCP6_CONN_HASH_SIZE]; 382 383 int tcp6_syn_cache_size = TCP6_SYN_HASH_SIZE; 384 int tcp6_syn_cache_limit = TCP6_SYN_HASH_SIZE*TCP6_SYN_BUCKET_SIZE; 385 int tcp6_syn_bucket_limit = 3*TCP6_SYN_BUCKET_SIZE; 386 struct syn_cache_head6 tcp6_syn_cache[TCP6_SYN_HASH_SIZE]; 387 struct syn_cache_head6 *tcp6_syn_cache_first; 388 int tcp6_syn_cache_interval = 8; /* runs timer every 4 seconds */ 389 int tcp6_syn_cache_timeo = TCP6TV_KEEP_INIT; 390 391 /* 392 * Parameters for computing a desirable data segment size 393 * given an upper bound (either interface MTU, or peer's MSS option)_. 394 * As applications tend to use a buffer size that is a multiple 395 * of kilobytes, try for something that divides evenly. However, 396 * do not round down too much. 397 * 398 * Round segment size down to a multiple of TCP6_ROUNDSIZE if this 399 * does not result in lowering by more than (size/TCP6_ROUNDFRAC). 400 * For example, round 536 to 512. Older versions of the system 401 * effectively used MCLBYTES (1K or 2K) as TCP6_ROUNDSIZE, with 402 * a value of 1 for TCP6_ROUNDFRAC (eliminating its effect). 403 * We round to a multiple of 256 for SLIP. 404 */ 405 #ifndef TCP6_ROUNDSIZE 406 #define TCP6_ROUNDSIZE 256 /* round to multiple of 256 */ 407 #endif 408 #ifndef TCP6_ROUNDFRAC 409 #define TCP6_ROUNDFRAC 10 /* round down at most N/10, or 10% */ 410 #endif 411 412 int tcp6_roundsize = TCP6_ROUNDSIZE; 413 int tcp6_roundfrac = TCP6_ROUNDFRAC; 414 #endif /*TCP6*/ 415 416 /* UDP on IP6 parameters */ 417 int udp6_sendspace = 9216; /* really max datagram size */ 418 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 419 /* 40 1K datagrams */ 420
Indexes created Tue Sep 23 02:09:52 GMT 2025