1 /* $FreeBSD: src/sys/netinet6/in6_proto.c,v 1.6.2.9 2003/01/24 05:11:35 sam Exp $ */
2 /* $DragonFly: src/sys/netinet6/in6_proto.c,v 1.14 2008/10/27 02:56:30 sephe Exp $ */
3 /* $KAME: in6_proto.c,v 1.91 2001/05/27 13:28:35 itojun Exp $ */
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * Copyright (c) 1982, 1986, 1993
36 * The Regents of the University of California. All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. All advertising materials mentioning features or use of this software
47 * must display the following acknowledgement:
48 * This product includes software developed by the University of
49 * California, Berkeley and its contributors.
50 * 4. Neither the name of the University nor the names of its contributors
51 * may be used to endorse or promote products derived from this software
52 * without specific prior written permission.
54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
66 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93
70 #include "opt_inet6.h"
71 #include "opt_ipsec.h"
74 #include <sys/param.h>
75 #include <sys/socket.h>
76 #include <sys/socketvar.h>
77 #include <sys/protosw.h>
78 #include <sys/kernel.h>
79 #include <sys/domain.h>
81 #include <sys/systm.h>
82 #include <sys/sysctl.h>
85 #include <net/radix.h>
86 #include <net/route.h>
88 #include <netinet/in.h>
89 #include <netinet/in_systm.h>
90 #include <netinet/in_var.h>
91 #include <netinet/ip_encap.h>
92 #include <netinet/ip.h>
93 #include <netinet/ip_var.h>
94 #include <netinet/ip6.h>
95 #include <netinet6/ip6_var.h>
96 #include <netinet/icmp6.h>
98 #include <netinet/tcp.h>
99 #include <netinet/tcp_timer.h>
100 #include <netinet/tcp_var.h>
101 #include <netinet/udp.h>
102 #include <netinet/udp_var.h>
103 #include <netinet6/tcp6_var.h>
104 #include <netinet6/raw_ip6.h>
105 #include <netinet6/udp6_var.h>
106 #include <netinet6/pim6_var.h>
107 #include <netinet6/nd6.h>
108 #include <netinet6/in6_prefix.h>
111 #include <netinet6/ipsec.h>
113 #include <netinet6/ipsec6.h>
115 #include <netinet6/ah.h>
117 #include <netinet6/ah6.h>
120 #include <netinet6/esp.h>
122 #include <netinet6/esp6.h>
125 #include <netinet6/ipcomp.h>
127 #include <netinet6/ipcomp6.h>
132 #include <netproto/ipsec/ipsec6.h>
135 #define ah6_input ipsec6_common_input
136 #define esp6_input ipsec6_common_input
137 #define ipcomp6_input ipsec6_common_input
138 #endif /* FAST_IPSEC */
140 #include <netinet6/ip6protosw.h>
142 #include <net/net_osdep.h>
145 #include <netinet/ip_carp.h>
150 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
153 extern struct domain inet6domain;
154 static struct pr_usrreqs nousrreqs;
157 #define PR_ABRTACPTDIS 0
159 struct protosw inet6sw[] = {
162 .pr_domain = &inet6domain,
163 .pr_protocol = IPPROTO_IPV6,
168 .pr_slowtimo = frag6_slowtimo,
169 .pr_drain = frag6_drain,
170 .pr_usrreqs = &nousrreqs
173 .pr_type = SOCK_DGRAM,
174 .pr_domain = &inet6domain,
175 .pr_protocol = IPPROTO_UDP,
176 .pr_flags = PR_ATOMIC | PR_ADDR | PR_MPSAFE | PR_LASTHDR,
178 .pr_input = udp6_input,
180 .pr_ctlinput = udp6_ctlinput,
181 .pr_ctloutput = ip6_ctloutput_dispatch,
183 .pr_ctlport = cpu0_ctlport,
184 .pr_usrreqs = &udp6_usrreqs
187 .pr_type = SOCK_STREAM,
188 .pr_domain = &inet6domain,
189 .pr_protocol = IPPROTO_TCP,
190 .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD | PR_LISTEN |
191 PR_MPSAFE | PR_LASTHDR,
193 .pr_input = tcp6_input,
195 .pr_ctlinput = tcp6_ctlinput,
196 .pr_ctloutput = tcp_ctloutput,
198 .pr_ctlport = cpu0_ctlport,
200 /* don't call initialization and timeout routines twice */
202 .pr_fasttimo = tcp_fasttimo,
203 .pr_slowtimo = tcp_slowtimo,
205 .pr_drain = tcp_drain,
206 .pr_usrreqs = &tcp6_usrreqs
210 .pr_domain = &inet6domain,
211 .pr_protocol = IPPROTO_RAW,
212 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
214 .pr_input = rip6_input,
215 .pr_output = rip6_output,
216 .pr_ctlinput = rip6_ctlinput,
217 .pr_ctloutput = rip6_ctloutput,
219 .pr_ctlport = cpu0_ctlport,
220 .pr_usrreqs = &rip6_usrreqs
224 .pr_domain = &inet6domain,
225 .pr_protocol = IPPROTO_ICMPV6,
226 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
228 .pr_input = icmp6_input,
229 .pr_output = rip6_output,
230 .pr_ctlinput = rip6_ctlinput,
231 .pr_ctloutput = rip6_ctloutput,
233 .pr_ctlport = cpu0_ctlport,
234 .pr_init = icmp6_init,
235 .pr_fasttimo = icmp6_fasttimo,
239 .pr_usrreqs = &rip6_usrreqs
243 .pr_domain = &inet6domain,
244 .pr_protocol = IPPROTO_DSTOPTS, PR_ATOMIC|PR_ADDR,
246 .pr_input = dest6_input,
249 .pr_ctloutput = NULL,
251 .pr_usrreqs = &nousrreqs
255 .pr_domain = &inet6domain,
256 .pr_protocol = IPPROTO_ROUTING, PR_ATOMIC|PR_ADDR,
258 .pr_input = route6_input,
261 .pr_ctloutput = NULL,
263 .pr_usrreqs = &nousrreqs
267 .pr_domain = &inet6domain,
268 .pr_protocol = IPPROTO_FRAGMENT, PR_ATOMIC|PR_ADDR,
270 .pr_input = frag6_input,
273 .pr_ctloutput = NULL,
275 .pr_usrreqs = &nousrreqs
280 .pr_domain = &inet6domain,
281 .pr_protocol = IPPROTO_AH,
282 .pr_flags = PR_ATOMIC|PR_ADDR,
284 .pr_input = ah6_input,
287 .pr_ctloutput = NULL,
289 .pr_usrreqs = &nousrreqs
294 .pr_domain = &inet6domain,
295 .pr_protocol = IPPROTO_ESP,
296 .pr_flags = PR_ATOMIC|PR_ADDR,
298 .pr_input = esp6_input,
300 .pr_ctlinput = esp6_ctlinput,
301 .pr_ctloutput = NULL,
303 .pr_usrreqs = &nousrreqs
308 .pr_domain = &inet6domain,
309 .pr_protocol = IPPROTO_IPCOMP,
310 .pr_flags = PR_ATOMIC|PR_ADDR,
312 .pr_input = ipcomp6_input,
315 .pr_ctloutput = NULL,
317 .pr_usrreqs = &nousrreqs
323 .pr_domain = &inet6domain,
324 .pr_protocol = IPPROTO_IPV4,
325 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
327 .pr_input = encap6_input,
328 .pr_output = rip6_output,
330 .pr_ctloutput = rip6_ctloutput,
332 .pr_init = encap_init,
333 .pr_usrreqs = &rip6_usrreqs
338 .pr_domain = &inet6domain,
339 .pr_protocol = IPPROTO_IPV6,
340 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
342 .pr_input = encap6_input,
343 .pr_output = rip6_output,
345 .pr_ctloutput = rip6_ctloutput,
347 .pr_init = encap_init,
348 .pr_usrreqs = &rip6_usrreqs
352 .pr_domain = &inet6domain,
353 .pr_protocol = IPPROTO_PIM,
354 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
356 .pr_input = pim6_input,
357 .pr_output = rip6_output,
359 .pr_ctloutput = rip6_ctloutput,
361 .pr_usrreqs = &rip6_usrreqs
366 .pr_domain = &inet6domain,
367 .pr_protocol = IPPROTO_CARP,
368 .pr_flags = PR_ATOMIC|PR_ADDR,
370 .pr_input = carp6_input,
371 .pr_output = rip6_output,
373 .pr_ctloutput = rip6_ctloutput,
375 .pr_usrreqs = &rip6_usrreqs
382 .pr_domain = &inet6domain,
384 .pr_flags = PR_ATOMIC|PR_ADDR,
386 .pr_input = rip6_input,
387 .pr_output = rip6_output,
389 .pr_ctloutput = rip6_ctloutput,
391 .pr_usrreqs = &rip6_usrreqs
395 extern int in6_inithead (void **, int);
397 struct domain inet6domain = {
398 AF_INET6, "internet6", NULL, NULL, NULL,
399 (struct protosw *)inet6sw,
400 (struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])],
401 SLIST_ENTRY_INITIALIZER,
402 in6_inithead, offsetof(struct sockaddr_in6, sin6_addr) << 3,
403 sizeof(struct sockaddr_in6), in6_domifattach, in6_domifdetach
409 * Internet configuration info
411 #ifndef IPV6FORWARDING
413 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */
415 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
416 #endif /* GATEWAY6 */
417 #endif /* !IPV6FORWARDING */
419 #ifndef IPV6_SENDREDIRECTS
420 #define IPV6_SENDREDIRECTS 1
423 int ip6_forwarding = IPV6FORWARDING; /* act as router? */
424 int ip6_sendredirects = IPV6_SENDREDIRECTS;
425 int ip6_defhlim = IPV6_DEFHLIM;
426 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
427 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */
428 int ip6_maxfragpackets; /* initialized in frag6.c:frag6_init() */
429 int ip6_log_interval = 5;
430 int ip6_hdrnestlimit = 50; /* appropriate? */
431 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */
432 u_int32_t ip6_flow_seq;
433 int ip6_auto_flowlabel = 1;
434 int ip6_gif_hlim = 0;
435 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */
436 int ip6_rr_prune = 5; /* router renumbering prefix
437 * walk list every 5 sec. */
440 u_int32_t ip6_id = 0UL;
441 int ip6_keepfaith = 0;
442 time_t ip6_log_time = (time_t)0L;
446 * BSDI4 defines these variables in in_proto.c...
447 * XXX: what if we don't define INET? Should we define pmtu6_expire
448 * or so? (jinmei@kame.net 19990310)
450 int pmtu_expire = 60*10;
451 int pmtu_probe = 60*2;
453 /* raw IP6 parameters */
455 * Nominal space allocated to a raw ip socket.
457 #define RIPV6SNDQ 8192
458 #define RIPV6RCVQ 8192
460 u_long rip6_sendspace = RIPV6SNDQ;
461 u_long rip6_recvspace = RIPV6RCVQ;
463 /* ICMPV6 parameters */
464 int icmp6_rediraccept = 1; /* accept and process redirects */
465 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */
466 int icmp6errppslim = 100; /* 100pps */
467 int icmp6_nodeinfo = 3; /* enable/disable NI response */
469 /* UDP on IP6 parameters */
470 int udp6_sendspace = 9216; /* really max datagram size */
471 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
472 /* 40 1K datagrams */
475 * sysctl related items.
477 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW, 0,
481 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW, 0, "IP6");
482 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW, 0, "ICMP6");
483 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW, 0, "UDP6");
484 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW, 0, "TCP6");
486 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW, 0, "IPSEC6");
491 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
496 error = SYSCTL_OUT(req, arg1, sizeof(int));
497 if (error || !req->newptr)
499 old = ip6_temp_preferred_lifetime;
500 error = SYSCTL_IN(req, arg1, sizeof(int));
501 if (ip6_temp_preferred_lifetime <
502 ip6_desync_factor + ip6_temp_regen_advance) {
503 ip6_temp_preferred_lifetime = old;
510 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
515 error = SYSCTL_OUT(req, arg1, sizeof(int));
516 if (error || !req->newptr)
518 old = ip6_temp_valid_lifetime;
519 error = SYSCTL_IN(req, arg1, sizeof(int));
520 if (ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) {
521 ip6_temp_preferred_lifetime = old;
527 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING,
528 forwarding, CTLFLAG_RW, &ip6_forwarding, 0, "");
529 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS,
530 redirect, CTLFLAG_RW, &ip6_sendredirects, 0, "");
531 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
532 hlim, CTLFLAG_RW, &ip6_defhlim, 0, "");
533 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RD,
534 &ip6stat, ip6stat, "");
535 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS,
536 maxfragpackets, CTLFLAG_RW, &ip6_maxfragpackets, 0, "");
537 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
538 accept_rtadv, CTLFLAG_RW, &ip6_accept_rtadv, 0, "");
539 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
540 keepfaith, CTLFLAG_RW, &ip6_keepfaith, 0, "");
541 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
542 log_interval, CTLFLAG_RW, &ip6_log_interval, 0, "");
543 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT,
544 hdrnestlimit, CTLFLAG_RW, &ip6_hdrnestlimit, 0, "");
545 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT,
546 dad_count, CTLFLAG_RW, &ip6_dad_count, 0, "");
547 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL,
548 auto_flowlabel, CTLFLAG_RW, &ip6_auto_flowlabel, 0, "");
549 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM,
550 defmcasthlim, CTLFLAG_RW, &ip6_defmcasthlim, 0, "");
551 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM,
552 gifhlim, CTLFLAG_RW, &ip6_gif_hlim, 0, "");
553 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
554 kame_version, CTLFLAG_RD, __KAME_VERSION, 0, "");
555 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED,
556 use_deprecated, CTLFLAG_RW, &ip6_use_deprecated, 0, "");
557 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
558 rr_prune, CTLFLAG_RW, &ip6_rr_prune, 0, "");
559 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR,
560 use_tempaddr, CTLFLAG_RW, &ip6_use_tempaddr, 0, "");
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 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
565 CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_valid_lifetime, 0,
566 sysctl_ip6_tempvltime, "I", "");
567 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY,
568 v6only, CTLFLAG_RW, &ip6_v6only, 0, "");
569 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL,
570 auto_linklocal, CTLFLAG_RW, &ip6_auto_linklocal, 0, "");
571 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD,
572 &rip6stat, rip6stat, "");
574 /* net.inet6.icmp6 */
575 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT,
576 rediraccept, CTLFLAG_RW, &icmp6_rediraccept, 0, "");
577 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT,
578 redirtimeout, CTLFLAG_RW, &icmp6_redirtimeout, 0, "");
579 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD,
580 &icmp6stat, icmp6stat, "");
581 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE,
582 nd6_prune, CTLFLAG_RW, &nd6_prune, 0, "");
583 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY,
584 nd6_delay, CTLFLAG_RW, &nd6_delay, 0, "");
585 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES,
586 nd6_umaxtries, CTLFLAG_RW, &nd6_umaxtries, 0, "");
587 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES,
588 nd6_mmaxtries, CTLFLAG_RW, &nd6_mmaxtries, 0, "");
589 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK,
590 nd6_useloopback, CTLFLAG_RW, &nd6_useloopback, 0, "");
591 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO,
592 nodeinfo, CTLFLAG_RW, &icmp6_nodeinfo, 0, "");
593 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT,
594 errppslimit, CTLFLAG_RW, &icmp6errppslim, 0, "");
595 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT,
596 nd6_maxnudhint, CTLFLAG_RW, &nd6_maxnudhint, 0, "");
597 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG,
598 nd6_debug, CTLFLAG_RW, &nd6_debug, 0, "");