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
11 * 1. Redistributions of source code must retain the above copyright
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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
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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
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25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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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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46 * may be used to endorse or promote products derived from this software
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51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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61 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93
65 #include "opt_inet6.h"
66 #include "opt_ipsec.h"
69 #include <sys/param.h>
70 #include <sys/socket.h>
71 #include <sys/socketvar.h>
72 #include <sys/protosw.h>
73 #include <sys/kernel.h>
74 #include <sys/domain.h>
76 #include <sys/systm.h>
77 #include <sys/sysctl.h>
80 #include <net/radix.h>
81 #include <net/route.h>
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/ip6.h>
90 #include <netinet6/ip6_var.h>
91 #include <netinet/icmp6.h>
93 #include <netinet/tcp.h>
94 #include <netinet/tcp_timer.h>
95 #include <netinet/tcp_var.h>
96 #include <netinet/udp.h>
97 #include <netinet/udp_var.h>
98 #include <netinet6/tcp6_var.h>
99 #include <netinet6/raw_ip6.h>
100 #include <netinet6/udp6_var.h>
101 #include <netinet6/pim6_var.h>
102 #include <netinet6/nd6.h>
105 #include <netinet6/ipsec.h>
107 #include <netinet6/ipsec6.h>
109 #include <netinet6/ah.h>
111 #include <netinet6/ah6.h>
114 #include <netinet6/esp.h>
116 #include <netinet6/esp6.h>
119 #include <netinet6/ipcomp.h>
121 #include <netinet6/ipcomp6.h>
126 #include <netproto/ipsec/ipsec6.h>
129 #define ah6_input ipsec6_common_input
130 #define esp6_input ipsec6_common_input
131 #define ipcomp6_input ipsec6_common_input
132 #endif /* FAST_IPSEC */
134 #include <netinet6/ip6protosw.h>
136 #include <net/net_osdep.h>
139 #include <netinet/ip_carp.h>
144 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
147 extern struct domain inet6domain;
148 static struct pr_usrreqs nousrreqs;
151 #define PR_ABRTACPTDIS 0
153 struct protosw inet6sw[] = {
156 .pr_domain = &inet6domain,
157 .pr_protocol = IPPROTO_IPV6,
162 .pr_slowtimo = frag6_slowtimo,
163 .pr_drain = frag6_drain,
164 .pr_usrreqs = &nousrreqs
167 .pr_type = SOCK_DGRAM,
168 .pr_domain = &inet6domain,
169 .pr_protocol = IPPROTO_UDP,
170 .pr_flags = PR_ATOMIC | PR_ADDR | PR_MPSAFE | PR_LASTHDR,
172 .pr_input = udp6_input,
174 .pr_ctlinput = udp6_ctlinput,
175 .pr_ctloutput = ip6_ctloutput_dispatch,
177 .pr_ctlport = cpu0_ctlport,
178 .pr_usrreqs = &udp6_usrreqs
181 .pr_type = SOCK_STREAM,
182 .pr_domain = &inet6domain,
183 .pr_protocol = IPPROTO_TCP,
184 .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD | PR_LISTEN |
185 PR_MPSAFE | PR_LASTHDR | PR_ASYNC_SEND | PR_ASYNC_RCVD,
187 .pr_input = tcp6_input,
189 .pr_ctlinput = tcp6_ctlinput,
190 .pr_ctloutput = tcp_ctloutput,
192 .pr_ctlport = cpu0_ctlport,
194 /* don't call initialization and timeout routines twice */
198 .pr_drain = tcp_drain,
199 .pr_usrreqs = &tcp6_usrreqs
203 .pr_domain = &inet6domain,
204 .pr_protocol = IPPROTO_RAW,
205 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
207 .pr_input = rip6_input,
208 .pr_output = rip6_output,
209 .pr_ctlinput = rip6_ctlinput,
210 .pr_ctloutput = rip6_ctloutput,
212 .pr_ctlport = cpu0_ctlport,
213 .pr_usrreqs = &rip6_usrreqs
217 .pr_domain = &inet6domain,
218 .pr_protocol = IPPROTO_ICMPV6,
219 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
221 .pr_input = icmp6_input,
222 .pr_output = rip6_output,
223 .pr_ctlinput = rip6_ctlinput,
224 .pr_ctloutput = rip6_ctloutput,
226 .pr_ctlport = cpu0_ctlport,
227 .pr_init = icmp6_init,
228 .pr_fasttimo = icmp6_fasttimo,
232 .pr_usrreqs = &rip6_usrreqs
236 .pr_domain = &inet6domain,
237 .pr_protocol = IPPROTO_DSTOPTS, PR_ATOMIC|PR_ADDR,
239 .pr_input = dest6_input,
242 .pr_ctloutput = NULL,
244 .pr_usrreqs = &nousrreqs
248 .pr_domain = &inet6domain,
249 .pr_protocol = IPPROTO_ROUTING, PR_ATOMIC|PR_ADDR,
251 .pr_input = route6_input,
254 .pr_ctloutput = NULL,
256 .pr_usrreqs = &nousrreqs
260 .pr_domain = &inet6domain,
261 .pr_protocol = IPPROTO_FRAGMENT, PR_ATOMIC|PR_ADDR,
263 .pr_input = frag6_input,
266 .pr_ctloutput = NULL,
268 .pr_usrreqs = &nousrreqs
273 .pr_domain = &inet6domain,
274 .pr_protocol = IPPROTO_AH,
275 .pr_flags = PR_ATOMIC|PR_ADDR,
277 .pr_input = ah6_input,
280 .pr_ctloutput = NULL,
282 .pr_usrreqs = &nousrreqs
287 .pr_domain = &inet6domain,
288 .pr_protocol = IPPROTO_ESP,
289 .pr_flags = PR_ATOMIC|PR_ADDR,
291 .pr_input = esp6_input,
293 .pr_ctlinput = esp6_ctlinput,
294 .pr_ctloutput = NULL,
296 .pr_usrreqs = &nousrreqs
301 .pr_domain = &inet6domain,
302 .pr_protocol = IPPROTO_IPCOMP,
303 .pr_flags = PR_ATOMIC|PR_ADDR,
305 .pr_input = ipcomp6_input,
308 .pr_ctloutput = NULL,
310 .pr_usrreqs = &nousrreqs
316 .pr_domain = &inet6domain,
317 .pr_protocol = IPPROTO_IPV4,
318 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
320 .pr_input = encap6_input,
321 .pr_output = rip6_output,
323 .pr_ctloutput = rip6_ctloutput,
325 .pr_init = encap_init,
326 .pr_usrreqs = &rip6_usrreqs
331 .pr_domain = &inet6domain,
332 .pr_protocol = IPPROTO_IPV6,
333 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
335 .pr_input = encap6_input,
336 .pr_output = rip6_output,
338 .pr_ctloutput = rip6_ctloutput,
340 .pr_init = encap_init,
341 .pr_usrreqs = &rip6_usrreqs
345 .pr_domain = &inet6domain,
346 .pr_protocol = IPPROTO_PIM,
347 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
349 .pr_input = pim6_input,
350 .pr_output = rip6_output,
352 .pr_ctloutput = rip6_ctloutput,
354 .pr_usrreqs = &rip6_usrreqs
359 .pr_domain = &inet6domain,
360 .pr_protocol = IPPROTO_CARP,
361 .pr_flags = PR_ATOMIC|PR_ADDR,
363 .pr_input = carp6_proto_input,
364 .pr_output = rip6_output,
366 .pr_ctloutput = rip6_ctloutput,
368 .pr_usrreqs = &rip6_usrreqs
375 .pr_domain = &inet6domain,
377 .pr_flags = PR_ATOMIC|PR_ADDR,
379 .pr_input = rip6_input,
380 .pr_output = rip6_output,
382 .pr_ctloutput = rip6_ctloutput,
384 .pr_usrreqs = &rip6_usrreqs
388 extern int in6_inithead (void **, int);
390 struct domain inet6domain = {
391 AF_INET6, "internet6", NULL, NULL, NULL,
392 (struct protosw *)inet6sw,
393 &inet6sw[NELEM(inet6sw)],
394 SLIST_ENTRY_INITIALIZER,
395 in6_inithead, offsetof(struct sockaddr_in6, sin6_addr) << 3,
396 sizeof(struct sockaddr_in6), in6_domifattach, in6_domifdetach
402 * Internet configuration info
404 #ifndef IPV6FORWARDING
406 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */
408 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
409 #endif /* GATEWAY6 */
410 #endif /* !IPV6FORWARDING */
412 #ifndef IPV6_SENDREDIRECTS
413 #define IPV6_SENDREDIRECTS 1
415 int nd6_onlink_ns_rfc4861 = 0; /* allow 'on-link' nd6 NS (as in RFC 4861) */
417 int ip6_forwarding = IPV6FORWARDING; /* act as router? */
418 int ip6_sendredirects = IPV6_SENDREDIRECTS;
419 int ip6_defhlim = IPV6_DEFHLIM;
420 int ip6_minhlim = IPV6_MINHLIM;
421 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
422 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */
423 int ip6_maxfragpackets; /* initialized in frag6.c:frag6_init() */
424 int ip6_log_interval = 5;
425 int ip6_hdrnestlimit = 50; /* appropriate? */
426 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */
427 u_int32_t ip6_flow_seq;
428 int ip6_auto_flowlabel = 1;
429 int ip6_gif_hlim = 0;
430 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */
431 int ip6_rr_prune = 5; /* router renumbering prefix
432 * walk list every 5 sec. */
434 u_int32_t ip6_id = 0UL;
435 int ip6_keepfaith = 0;
436 time_t ip6_log_time = (time_t)0L;
440 * BSDI4 defines these variables in in_proto.c...
441 * XXX: what if we don't define INET? Should we define pmtu6_expire
442 * or so? (jinmei@kame.net 19990310)
444 int pmtu_expire = 60*10;
445 int pmtu_probe = 60*2;
447 /* raw IP6 parameters */
449 * Nominal space allocated to a raw ip socket.
451 #define RIPV6SNDQ 8192
452 #define RIPV6RCVQ 8192
454 u_long rip6_sendspace = RIPV6SNDQ;
455 u_long rip6_recvspace = RIPV6RCVQ;
457 /* ICMPV6 parameters */
458 int icmp6_rediraccept = 1; /* accept and process redirects */
459 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */
460 int icmp6errppslim = 100; /* 100pps */
461 int icmp6_nodeinfo = 3; /* enable/disable NI response */
463 /* UDP on IP6 parameters */
464 int udp6_sendspace = 9216; /* really max datagram size */
465 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
466 /* 40 1K datagrams */
469 * sysctl related items.
471 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW, 0,
475 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW, 0, "IP6");
476 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW, 0, "ICMP6");
477 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW, 0, "UDP6");
478 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW, 0, "TCP6");
480 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW, 0, "IPSEC6");
485 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
490 error = SYSCTL_OUT(req, arg1, sizeof(int));
491 if (error || !req->newptr)
493 old = ip6_temp_preferred_lifetime;
494 error = SYSCTL_IN(req, arg1, sizeof(int));
495 if (ip6_temp_preferred_lifetime <
496 ip6_desync_factor + ip6_temp_regen_advance) {
497 ip6_temp_preferred_lifetime = old;
504 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
509 error = SYSCTL_OUT(req, arg1, sizeof(int));
510 if (error || !req->newptr)
512 old = ip6_temp_valid_lifetime;
513 error = SYSCTL_IN(req, arg1, sizeof(int));
514 if (ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) {
515 ip6_temp_preferred_lifetime = old;
521 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, CTLFLAG_RW,
522 &ip6_forwarding, 0, "Enable IP forwarding between interfaces");
523 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, CTLFLAG_RW,
524 &ip6_sendredirects, 0, "Enable sending IP redirects");
525 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
526 hlim, CTLFLAG_RW, &ip6_defhlim, 0, "Default hop limit");
527 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MINHLIM,
528 minhlim, CTLFLAG_RW, &ip6_minhlim, 0, "Default hop limit");
529 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RD,
530 &ip6stat, ip6stat, "IP stats");
531 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS, maxfragpackets,
532 CTLFLAG_RW, &ip6_maxfragpackets, 0, "Maximum packets in reassembly queue");
533 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv,
534 CTLFLAG_RW, &ip6_accept_rtadv, 0, "Acts as a host not a router");
535 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
536 keepfaith, CTLFLAG_RW, &ip6_keepfaith, 0,
537 "Enable packet capture for FAITH IPv4->IPv6 translator daemon");
538 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
539 log_interval, CTLFLAG_RW, &ip6_log_interval, 0, "");
540 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit, CTLFLAG_RW,
541 &ip6_hdrnestlimit, 0, "Upper limit of # of extension headers");
542 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, CTLFLAG_RW,
543 &ip6_dad_count, 0, "Number of times to perform duplicate address detectione");
544 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel, CTLFLAG_RW,
545 &ip6_auto_flowlabel, 0, "Enable attaching flowlabel automatically");
546 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim, CTLFLAG_RW,
547 &ip6_defmcasthlim, 0, "Default multicast hop limit");
548 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM, gifhlim, CTLFLAG_RW,
549 &ip6_gif_hlim, 0, "Hop limit for gif encap packet");
550 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
551 kame_version, CTLFLAG_RD, __KAME_VERSION, 0, "Kame version");
552 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated, CTLFLAG_RW,
553 &ip6_use_deprecated, 0, "Allow deprecated addr as source");
554 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
555 rr_prune, CTLFLAG_RW, &ip6_rr_prune, 0,
556 "Walk timer for router renumbering");
557 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr, CTLFLAG_RW,
558 &ip6_use_tempaddr, 0, "Whether to use temporary addresses");
559 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
560 CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_preferred_lifetime, 0,
561 sysctl_ip6_temppltime, "I",
562 "Preferred lifetime for tmpaddrs");
563 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
564 CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_valid_lifetime, 0,
565 sysctl_ip6_tempvltime, "I",
566 "Valid lifetime for tmpaddrs");
567 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal, CTLFLAG_RW,
568 &ip6_auto_linklocal, 0, "Enable auto-assigning a link-local address");
569 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD,
570 &rip6stat, rip6stat, "Raw stats");
572 /* net.inet6.icmp6 */
573 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept, CTLFLAG_RW,
574 &icmp6_rediraccept, 0, "If enabled, accept and process redirects");
575 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout, CTLFLAG_RW,
576 &icmp6_redirtimeout, 0, "Cache time for redirect routes");
577 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD,
578 &icmp6stat, icmp6stat, "Stats");
579 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, CTLFLAG_RW,
580 &nd6_prune, 0, "Prune interval");
581 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, CTLFLAG_RW,
582 &nd6_delay, 0, "Reachability timeout for stale neighbors");
583 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries, CTLFLAG_RW,
584 &nd6_umaxtries, 0, "Maximum unicast query");
585 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries, CTLFLAG_RW,
586 &nd6_mmaxtries, 0, "Maximum multicast query");
587 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback, CTLFLAG_RW,
588 &nd6_useloopback, 0, "Use loopback interface for local traffic");
589 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO,
590 nodeinfo, CTLFLAG_RW, &icmp6_nodeinfo, 0, "Enable/disable NI response");
591 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT,
592 errppslimit, CTLFLAG_RW, &icmp6errppslim, 0,
593 "ICMPv6 error maximum packet-per-second value (default: 100pps)");
594 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint, CTLFLAG_RW,
595 &nd6_maxnudhint, 0, "Max # of subsequent upper layer hints");
596 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, CTLFLAG_RW,
597 &nd6_debug, 0, "Enable debug output");
598 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861, nd6_onlink_ns_rfc4861, CTLFLAG_RW,
599 &nd6_onlink_ns_rfc4861, 0, "Accept 'on-link' nd6 NS in compliance with RFC 4861.");