1 /* $FreeBSD: src/sys/netinet6/in6_proto.c,v 1.6.2.9 2003/01/24 05:11:35 sam Exp $ */
2 /* $KAME: in6_proto.c,v 1.91 2001/05/27 13:28:35 itojun Exp $ */
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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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.
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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
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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
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34 * Copyright (c) 1982, 1986, 1993
35 * The Regents of the University of California. All rights reserved.
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38 * modification, are permitted provided that the following conditions
40 * 1. Redistributions of source code must retain the above copyright
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47 * This product includes software developed by the University of
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50 * may be used to endorse or promote products derived from this software
51 * without specific prior written permission.
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
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58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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65 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93
69 #include "opt_inet6.h"
70 #include "opt_ipsec.h"
73 #include <sys/param.h>
74 #include <sys/socket.h>
75 #include <sys/socketvar.h>
76 #include <sys/protosw.h>
77 #include <sys/kernel.h>
78 #include <sys/domain.h>
80 #include <sys/systm.h>
81 #include <sys/sysctl.h>
84 #include <net/radix.h>
85 #include <net/route.h>
87 #include <netinet/in.h>
88 #include <netinet/in_systm.h>
89 #include <netinet/in_var.h>
90 #include <netinet/ip_encap.h>
91 #include <netinet/ip.h>
92 #include <netinet/ip_var.h>
93 #include <netinet/ip6.h>
94 #include <netinet6/ip6_var.h>
95 #include <netinet/icmp6.h>
97 #include <netinet/tcp.h>
98 #include <netinet/tcp_timer.h>
99 #include <netinet/tcp_var.h>
100 #include <netinet/udp.h>
101 #include <netinet/udp_var.h>
102 #include <netinet6/tcp6_var.h>
103 #include <netinet6/raw_ip6.h>
104 #include <netinet6/udp6_var.h>
105 #include <netinet6/pim6_var.h>
106 #include <netinet6/nd6.h>
107 #include <netinet6/in6_prefix.h>
110 #include <netinet6/ipsec.h>
112 #include <netinet6/ipsec6.h>
114 #include <netinet6/ah.h>
116 #include <netinet6/ah6.h>
119 #include <netinet6/esp.h>
121 #include <netinet6/esp6.h>
124 #include <netinet6/ipcomp.h>
126 #include <netinet6/ipcomp6.h>
131 #include <netproto/ipsec/ipsec6.h>
134 #define ah6_input ipsec6_common_input
135 #define esp6_input ipsec6_common_input
136 #define ipcomp6_input ipsec6_common_input
137 #endif /* FAST_IPSEC */
139 #include <netinet6/ip6protosw.h>
141 #include <net/net_osdep.h>
144 #include <netinet/ip_carp.h>
149 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
152 extern struct domain inet6domain;
153 static struct pr_usrreqs nousrreqs;
156 #define PR_ABRTACPTDIS 0
158 struct protosw inet6sw[] = {
161 .pr_domain = &inet6domain,
162 .pr_protocol = IPPROTO_IPV6,
167 .pr_slowtimo = frag6_slowtimo,
168 .pr_drain = frag6_drain,
169 .pr_usrreqs = &nousrreqs
172 .pr_type = SOCK_DGRAM,
173 .pr_domain = &inet6domain,
174 .pr_protocol = IPPROTO_UDP,
175 .pr_flags = PR_ATOMIC | PR_ADDR | PR_MPSAFE | PR_LASTHDR,
177 .pr_input = udp6_input,
179 .pr_ctlinput = udp6_ctlinput,
180 .pr_ctloutput = ip6_ctloutput_dispatch,
182 .pr_ctlport = cpu0_ctlport,
183 .pr_usrreqs = &udp6_usrreqs
186 .pr_type = SOCK_STREAM,
187 .pr_domain = &inet6domain,
188 .pr_protocol = IPPROTO_TCP,
189 .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD | PR_LISTEN |
190 PR_MPSAFE | PR_LASTHDR | PR_ASYNC_SEND | PR_ASYNC_RCVD,
192 .pr_input = tcp6_input,
194 .pr_ctlinput = tcp6_ctlinput,
195 .pr_ctloutput = tcp_ctloutput,
197 .pr_ctlport = cpu0_ctlport,
199 /* don't call initialization and timeout routines twice */
203 .pr_drain = tcp_drain,
204 .pr_usrreqs = &tcp6_usrreqs
208 .pr_domain = &inet6domain,
209 .pr_protocol = IPPROTO_RAW,
210 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
212 .pr_input = rip6_input,
213 .pr_output = rip6_output,
214 .pr_ctlinput = rip6_ctlinput,
215 .pr_ctloutput = rip6_ctloutput,
217 .pr_ctlport = cpu0_ctlport,
218 .pr_usrreqs = &rip6_usrreqs
222 .pr_domain = &inet6domain,
223 .pr_protocol = IPPROTO_ICMPV6,
224 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
226 .pr_input = icmp6_input,
227 .pr_output = rip6_output,
228 .pr_ctlinput = rip6_ctlinput,
229 .pr_ctloutput = rip6_ctloutput,
231 .pr_ctlport = cpu0_ctlport,
232 .pr_init = icmp6_init,
233 .pr_fasttimo = icmp6_fasttimo,
237 .pr_usrreqs = &rip6_usrreqs
241 .pr_domain = &inet6domain,
242 .pr_protocol = IPPROTO_DSTOPTS, PR_ATOMIC|PR_ADDR,
244 .pr_input = dest6_input,
247 .pr_ctloutput = NULL,
249 .pr_usrreqs = &nousrreqs
253 .pr_domain = &inet6domain,
254 .pr_protocol = IPPROTO_ROUTING, PR_ATOMIC|PR_ADDR,
256 .pr_input = route6_input,
259 .pr_ctloutput = NULL,
261 .pr_usrreqs = &nousrreqs
265 .pr_domain = &inet6domain,
266 .pr_protocol = IPPROTO_FRAGMENT, PR_ATOMIC|PR_ADDR,
268 .pr_input = frag6_input,
271 .pr_ctloutput = NULL,
273 .pr_usrreqs = &nousrreqs
278 .pr_domain = &inet6domain,
279 .pr_protocol = IPPROTO_AH,
280 .pr_flags = PR_ATOMIC|PR_ADDR,
282 .pr_input = ah6_input,
285 .pr_ctloutput = NULL,
287 .pr_usrreqs = &nousrreqs
292 .pr_domain = &inet6domain,
293 .pr_protocol = IPPROTO_ESP,
294 .pr_flags = PR_ATOMIC|PR_ADDR,
296 .pr_input = esp6_input,
298 .pr_ctlinput = esp6_ctlinput,
299 .pr_ctloutput = NULL,
301 .pr_usrreqs = &nousrreqs
306 .pr_domain = &inet6domain,
307 .pr_protocol = IPPROTO_IPCOMP,
308 .pr_flags = PR_ATOMIC|PR_ADDR,
310 .pr_input = ipcomp6_input,
313 .pr_ctloutput = NULL,
315 .pr_usrreqs = &nousrreqs
321 .pr_domain = &inet6domain,
322 .pr_protocol = IPPROTO_IPV4,
323 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
325 .pr_input = encap6_input,
326 .pr_output = rip6_output,
328 .pr_ctloutput = rip6_ctloutput,
330 .pr_init = encap_init,
331 .pr_usrreqs = &rip6_usrreqs
336 .pr_domain = &inet6domain,
337 .pr_protocol = IPPROTO_IPV6,
338 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
340 .pr_input = encap6_input,
341 .pr_output = rip6_output,
343 .pr_ctloutput = rip6_ctloutput,
345 .pr_init = encap_init,
346 .pr_usrreqs = &rip6_usrreqs
350 .pr_domain = &inet6domain,
351 .pr_protocol = IPPROTO_PIM,
352 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
354 .pr_input = pim6_input,
355 .pr_output = rip6_output,
357 .pr_ctloutput = rip6_ctloutput,
359 .pr_usrreqs = &rip6_usrreqs
364 .pr_domain = &inet6domain,
365 .pr_protocol = IPPROTO_CARP,
366 .pr_flags = PR_ATOMIC|PR_ADDR,
368 .pr_input = carp6_proto_input,
369 .pr_output = rip6_output,
371 .pr_ctloutput = rip6_ctloutput,
373 .pr_usrreqs = &rip6_usrreqs
380 .pr_domain = &inet6domain,
382 .pr_flags = PR_ATOMIC|PR_ADDR,
384 .pr_input = rip6_input,
385 .pr_output = rip6_output,
387 .pr_ctloutput = rip6_ctloutput,
389 .pr_usrreqs = &rip6_usrreqs
393 extern int in6_inithead (void **, int);
395 struct domain inet6domain = {
396 AF_INET6, "internet6", NULL, NULL, NULL,
397 (struct protosw *)inet6sw,
398 &inet6sw[NELEM(inet6sw)],
399 SLIST_ENTRY_INITIALIZER,
400 in6_inithead, offsetof(struct sockaddr_in6, sin6_addr) << 3,
401 sizeof(struct sockaddr_in6), in6_domifattach, in6_domifdetach
407 * Internet configuration info
409 #ifndef IPV6FORWARDING
411 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */
413 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
414 #endif /* GATEWAY6 */
415 #endif /* !IPV6FORWARDING */
417 #ifndef IPV6_SENDREDIRECTS
418 #define IPV6_SENDREDIRECTS 1
421 int ip6_forwarding = IPV6FORWARDING; /* act as router? */
422 int ip6_sendredirects = IPV6_SENDREDIRECTS;
423 int ip6_defhlim = IPV6_DEFHLIM;
424 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
425 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */
426 int ip6_maxfragpackets; /* initialized in frag6.c:frag6_init() */
427 int ip6_log_interval = 5;
428 int ip6_hdrnestlimit = 50; /* appropriate? */
429 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */
430 u_int32_t ip6_flow_seq;
431 int ip6_auto_flowlabel = 1;
432 int ip6_gif_hlim = 0;
433 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */
434 int ip6_rr_prune = 5; /* router renumbering prefix
435 * walk list every 5 sec. */
438 u_int32_t ip6_id = 0UL;
439 int ip6_keepfaith = 0;
440 time_t ip6_log_time = (time_t)0L;
444 * BSDI4 defines these variables in in_proto.c...
445 * XXX: what if we don't define INET? Should we define pmtu6_expire
446 * or so? (jinmei@kame.net 19990310)
448 int pmtu_expire = 60*10;
449 int pmtu_probe = 60*2;
451 /* raw IP6 parameters */
453 * Nominal space allocated to a raw ip socket.
455 #define RIPV6SNDQ 8192
456 #define RIPV6RCVQ 8192
458 u_long rip6_sendspace = RIPV6SNDQ;
459 u_long rip6_recvspace = RIPV6RCVQ;
461 /* ICMPV6 parameters */
462 int icmp6_rediraccept = 1; /* accept and process redirects */
463 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */
464 int icmp6errppslim = 100; /* 100pps */
465 int icmp6_nodeinfo = 3; /* enable/disable NI response */
467 /* UDP on IP6 parameters */
468 int udp6_sendspace = 9216; /* really max datagram size */
469 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
470 /* 40 1K datagrams */
473 * sysctl related items.
475 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW, 0,
479 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW, 0, "IP6");
480 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW, 0, "ICMP6");
481 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW, 0, "UDP6");
482 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW, 0, "TCP6");
484 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW, 0, "IPSEC6");
489 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
494 error = SYSCTL_OUT(req, arg1, sizeof(int));
495 if (error || !req->newptr)
497 old = ip6_temp_preferred_lifetime;
498 error = SYSCTL_IN(req, arg1, sizeof(int));
499 if (ip6_temp_preferred_lifetime <
500 ip6_desync_factor + ip6_temp_regen_advance) {
501 ip6_temp_preferred_lifetime = old;
508 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
513 error = SYSCTL_OUT(req, arg1, sizeof(int));
514 if (error || !req->newptr)
516 old = ip6_temp_valid_lifetime;
517 error = SYSCTL_IN(req, arg1, sizeof(int));
518 if (ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) {
519 ip6_temp_preferred_lifetime = old;
525 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, CTLFLAG_RW,
526 &ip6_forwarding, 0, "Enable IP forwarding between interfaces");
527 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, CTLFLAG_RW,
528 &ip6_sendredirects, 0, "Enable sending IP redirects");
529 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
530 hlim, CTLFLAG_RW, &ip6_defhlim, 0, "Default hop limit");
531 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RD,
532 &ip6stat, ip6stat, "IP stats");
533 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS, maxfragpackets,
534 CTLFLAG_RW, &ip6_maxfragpackets, 0, "Maximum packets in reassembly queue");
535 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv,
536 CTLFLAG_RW, &ip6_accept_rtadv, 0, "Acts as a host not a router");
537 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
538 keepfaith, CTLFLAG_RW, &ip6_keepfaith, 0,
539 "Enable packet capture for FAITH IPv4->IPv6 translator daemon");
540 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
541 log_interval, CTLFLAG_RW, &ip6_log_interval, 0, "");
542 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit, CTLFLAG_RW,
543 &ip6_hdrnestlimit, 0, "Upper limit of # of extension headers");
544 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, CTLFLAG_RW,
545 &ip6_dad_count, 0, "Number of times to perform duplicate address detectione");
546 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel, CTLFLAG_RW,
547 &ip6_auto_flowlabel, 0, "Enable attaching flowlabel automatically");
548 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim, CTLFLAG_RW,
549 &ip6_defmcasthlim, 0, "Default multicast hop limit");
550 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM, gifhlim, CTLFLAG_RW,
551 &ip6_gif_hlim, 0, "Hop limit for gif encap packet");
552 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
553 kame_version, CTLFLAG_RD, __KAME_VERSION, 0, "Kame version");
554 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated, CTLFLAG_RW,
555 &ip6_use_deprecated, 0, "Allow deprecated addr as source");
556 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
557 rr_prune, CTLFLAG_RW, &ip6_rr_prune, 0,
558 "Walk timer for router renumbering");
559 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr, CTLFLAG_RW,
560 &ip6_use_tempaddr, 0, "Whether to use temporary addresses");
561 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
562 CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_preferred_lifetime, 0,
563 sysctl_ip6_temppltime, "I",
564 "Preferred lifetime for tmpaddrs");
565 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
566 CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_valid_lifetime, 0,
567 sysctl_ip6_tempvltime, "I",
568 "Valid lifetime for tmpaddrs");
569 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only, CTLFLAG_RW,
570 &ip6_v6only, 0,"Forbid v4, restrict AF_INET6 socket for v6");
571 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal, CTLFLAG_RW,
572 &ip6_auto_linklocal, 0, "Enable auto-assigning a link-local address");
573 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD,
574 &rip6stat, rip6stat, "Raw stats");
576 /* net.inet6.icmp6 */
577 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept, CTLFLAG_RW,
578 &icmp6_rediraccept, 0, "If enabled, accept and process redirects");
579 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout, CTLFLAG_RW,
580 &icmp6_redirtimeout, 0, "Cache time for redirect routes");
581 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD,
582 &icmp6stat, icmp6stat, "Stats");
583 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, CTLFLAG_RW,
584 &nd6_prune, 0, "Prune interval");
585 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, CTLFLAG_RW,
586 &nd6_delay, 0, "Reachability timeout for stale neighbors");
587 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries, CTLFLAG_RW,
588 &nd6_umaxtries, 0, "Maximum unicast query");
589 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries, CTLFLAG_RW,
590 &nd6_mmaxtries, 0, "Maximum multicast query");
591 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback, CTLFLAG_RW,
592 &nd6_useloopback, 0, "Use loopback interface for local traffic");
593 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO,
594 nodeinfo, CTLFLAG_RW, &icmp6_nodeinfo, 0, "Enable/disable NI response");
595 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT,
596 errppslimit, CTLFLAG_RW, &icmp6errppslim, 0,
597 "ICMPv6 error maximum packet-per-second value (default: 100pps)");
598 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint, CTLFLAG_RW,
599 &nd6_maxnudhint, 0, "Max # of subsequent upper layer hints");
600 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, CTLFLAG_RW,
601 &nd6_debug, 0, "Enable debug output");