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
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.
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
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34 * Copyright (c) 1982, 1986, 1993
35 * The Regents of the University of California. All rights reserved.
37 * Redistribution and use in source and binary forms, with or without
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"
68 #include <sys/param.h>
69 #include <sys/socket.h>
70 #include <sys/socketvar.h>
71 #include <sys/protosw.h>
72 #include <sys/kernel.h>
73 #include <sys/domain.h>
75 #include <sys/systm.h>
76 #include <sys/sysctl.h>
79 #include <net/radix.h>
80 #include <net/route.h>
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/ip6.h>
89 #include <netinet6/ip6_var.h>
90 #include <netinet/icmp6.h>
92 #include <netinet/tcp.h>
93 #include <netinet/tcp_timer.h>
94 #include <netinet/tcp_var.h>
95 #include <netinet/udp.h>
96 #include <netinet/udp_var.h>
97 #include <netinet6/tcp6_var.h>
98 #include <netinet6/raw_ip6.h>
99 #include <netinet6/udp6_var.h>
100 #include <netinet6/pim6_var.h>
101 #include <netinet6/nd6.h>
103 #include <netinet6/ip6protosw.h>
105 #include <net/net_osdep.h>
108 #include <netinet/ip_carp.h>
113 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
116 extern struct domain inet6domain
;
117 static struct pr_usrreqs nousrreqs
;
120 #define PR_ABRTACPTDIS 0
122 struct protosw inet6sw
[] = {
125 .pr_domain
= &inet6domain
,
126 .pr_protocol
= IPPROTO_IPV6
,
130 .pr_drain
= frag6_drain
,
131 .pr_usrreqs
= &nousrreqs
134 .pr_type
= SOCK_DGRAM
,
135 .pr_domain
= &inet6domain
,
136 .pr_protocol
= IPPROTO_UDP
,
137 .pr_flags
= PR_ATOMIC
| PR_ADDR
| PR_MPSAFE
| PR_LASTHDR
,
139 .pr_input
= udp6_input
,
141 .pr_ctlinput
= udp6_ctlinput
,
142 .pr_ctloutput
= ip6_ctloutput_dispatch
,
144 .pr_ctlport
= cpu0_ctlport
,
145 .pr_usrreqs
= &udp6_usrreqs
148 .pr_type
= SOCK_STREAM
,
149 .pr_domain
= &inet6domain
,
150 .pr_protocol
= IPPROTO_TCP
,
151 .pr_flags
= PR_CONNREQUIRED
| PR_WANTRCVD
| PR_LISTEN
|
152 PR_MPSAFE
| PR_LASTHDR
| PR_ASYNC_SEND
| PR_ASYNC_RCVD
,
154 .pr_input
= tcp6_input
,
156 .pr_ctlinput
= tcp6_ctlinput
,
157 .pr_ctloutput
= tcp_ctloutput
,
159 .pr_ctlport
= cpu0_ctlport
,
161 /* don't call initialization and timeout routines twice */
164 .pr_drain
= tcp_drain
,
165 .pr_usrreqs
= &tcp6_usrreqs
169 .pr_domain
= &inet6domain
,
170 .pr_protocol
= IPPROTO_RAW
,
171 .pr_flags
= PR_ATOMIC
|PR_ADDR
|PR_LASTHDR
,
173 .pr_input
= rip6_input
,
174 .pr_output
= rip6_output
,
175 .pr_ctlinput
= rip6_ctlinput
,
176 .pr_ctloutput
= rip6_ctloutput
,
178 .pr_ctlport
= cpu0_ctlport
,
179 .pr_usrreqs
= &rip6_usrreqs
183 .pr_domain
= &inet6domain
,
184 .pr_protocol
= IPPROTO_ICMPV6
,
185 .pr_flags
= PR_ATOMIC
|PR_ADDR
|PR_LASTHDR
,
187 .pr_input
= icmp6_input
,
188 .pr_output
= rip6_output
,
189 .pr_ctlinput
= rip6_ctlinput
,
190 .pr_ctloutput
= rip6_ctloutput
,
192 .pr_ctlport
= cpu0_ctlport
,
193 .pr_init
= icmp6_init
,
196 .pr_usrreqs
= &rip6_usrreqs
200 .pr_domain
= &inet6domain
,
201 .pr_protocol
= IPPROTO_DSTOPTS
, PR_ATOMIC
|PR_ADDR
,
203 .pr_input
= dest6_input
,
206 .pr_ctloutput
= NULL
,
208 .pr_usrreqs
= &nousrreqs
212 .pr_domain
= &inet6domain
,
213 .pr_protocol
= IPPROTO_ROUTING
, PR_ATOMIC
|PR_ADDR
,
215 .pr_input
= route6_input
,
218 .pr_ctloutput
= NULL
,
220 .pr_usrreqs
= &nousrreqs
224 .pr_domain
= &inet6domain
,
225 .pr_protocol
= IPPROTO_FRAGMENT
, PR_ATOMIC
|PR_ADDR
,
227 .pr_input
= frag6_input
,
230 .pr_ctloutput
= NULL
,
232 .pr_usrreqs
= &nousrreqs
237 .pr_domain
= &inet6domain
,
238 .pr_protocol
= IPPROTO_IPV4
,
239 .pr_flags
= PR_ATOMIC
|PR_ADDR
|PR_LASTHDR
,
241 .pr_input
= encap6_input
,
242 .pr_output
= rip6_output
,
244 .pr_ctloutput
= rip6_ctloutput
,
246 .pr_init
= encap_init
,
247 .pr_usrreqs
= &rip6_usrreqs
252 .pr_domain
= &inet6domain
,
253 .pr_protocol
= IPPROTO_IPV6
,
254 .pr_flags
= PR_ATOMIC
|PR_ADDR
|PR_LASTHDR
,
256 .pr_input
= encap6_input
,
257 .pr_output
= rip6_output
,
259 .pr_ctloutput
= rip6_ctloutput
,
261 .pr_init
= encap_init
,
262 .pr_usrreqs
= &rip6_usrreqs
266 .pr_domain
= &inet6domain
,
267 .pr_protocol
= IPPROTO_PIM
,
268 .pr_flags
= PR_ATOMIC
|PR_ADDR
|PR_LASTHDR
,
270 .pr_input
= pim6_input
,
271 .pr_output
= rip6_output
,
273 .pr_ctloutput
= rip6_ctloutput
,
275 .pr_usrreqs
= &rip6_usrreqs
280 .pr_domain
= &inet6domain
,
281 .pr_protocol
= IPPROTO_CARP
,
282 .pr_flags
= PR_ATOMIC
|PR_ADDR
,
284 .pr_input
= carp6_proto_input
,
285 .pr_output
= rip6_output
,
287 .pr_ctloutput
= rip6_ctloutput
,
289 .pr_usrreqs
= &rip6_usrreqs
296 .pr_domain
= &inet6domain
,
298 .pr_flags
= PR_ATOMIC
|PR_ADDR
,
300 .pr_input
= rip6_input
,
301 .pr_output
= rip6_output
,
303 .pr_ctloutput
= rip6_ctloutput
,
305 .pr_usrreqs
= &rip6_usrreqs
309 extern int in6_inithead (void **, int);
311 struct domain inet6domain
= {
312 .dom_family
= AF_INET6
,
313 .dom_name
= "internet6",
315 .dom_externalize
= NULL
,
317 .dom_protosw
= inet6sw
,
318 .dom_protoswNPROTOSW
= &inet6sw
[NELEM(inet6sw
)],
319 .dom_next
= SLIST_ENTRY_INITIALIZER
,
320 .dom_rtattach
= in6_inithead
,
321 .dom_rtoffset
= offsetof(struct sockaddr_in6
, sin6_addr
),
322 .dom_maxrtkey
= sizeof(struct sockaddr_in6
),
323 .dom_ifattach
= in6_domifattach
,
324 .dom_ifdetach
= in6_domifdetach
,
325 .dom_if_up
= in6_if_up
,
326 .dom_if_down
= in6_if_down
332 * Internet configuration info
334 #ifndef IPV6FORWARDING
336 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */
338 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
339 #endif /* GATEWAY6 */
340 #endif /* !IPV6FORWARDING */
342 #ifndef IPV6_SENDREDIRECTS
343 #define IPV6_SENDREDIRECTS 1
346 int nd6_onlink_ns_rfc4861
= 0; /* allow 'on-link' NS/NA (as in RFC 4861) */
348 int ip6_forwarding
= IPV6FORWARDING
; /* act as router? */
349 int ip6_sendredirects
= IPV6_SENDREDIRECTS
;
350 int ip6_defhlim
= IPV6_DEFHLIM
;
351 int ip6_minhlim
= IPV6_MINHLIM
;
352 int ip6_defmcasthlim
= IPV6_DEFAULT_MULTICAST_HOPS
;
353 int ip6_accept_rtadv
= 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */
354 int ip6_maxfragpackets
; /* initialized in frag6.c:frag6_init() */
355 int ip6_maxfrags
; /* initialized in frag6.c:frag6_init() */
356 int ip6_log_interval
= 5;
357 int ip6_hdrnestlimit
= 50; /* appropriate? */
358 int ip6_dad_count
= 1; /* DupAddrDetectionTransmits */
359 u_int32_t ip6_flow_seq
;
360 int ip6_auto_flowlabel
= 1;
361 int ip6_gif_hlim
= 0;
362 int ip6_use_deprecated
= 1; /* allow deprecated addr (RFC2462 5.5.4) */
363 int ip6_rr_prune
= 5; /* router renumbering prefix
364 * walk list every 5 sec. */
366 #ifdef IP6_AUTO_LINKLOCAL
367 int ip6_auto_linklocal
= IP6_AUTO_LINKLOCAL
;
369 int ip6_auto_linklocal
= 1; /* enable by default */
372 u_int32_t ip6_id
= 0UL;
373 time_t ip6_log_time
= (time_t)0L;
377 * BSDI4 defines these variables in in_proto.c...
378 * XXX: what if we don't define INET? Should we define pmtu6_expire
379 * or so? (jinmei@kame.net 19990310)
381 int pmtu_expire
= 60*10;
382 int pmtu_probe
= 60*2;
384 /* raw IP6 parameters */
386 * Nominal space allocated to a raw ip socket.
388 #define RIPV6SNDQ 8192
389 #define RIPV6RCVQ 8192
391 u_long rip6_sendspace
= RIPV6SNDQ
;
392 u_long rip6_recvspace
= RIPV6RCVQ
;
394 /* ICMPV6 parameters */
395 int icmp6_rediraccept
= 1; /* accept and process redirects */
396 int icmp6_redirtimeout
= 10 * 60; /* 10 minutes */
397 int icmp6errppslim
= 100; /* 100pps */
398 int icmp6_nodeinfo
= 3; /* enable/disable NI response */
400 /* UDP on IP6 parameters */
401 int udp6_sendspace
= 9216; /* really max datagram size */
402 int udp6_recvspace
= 40 * (1024 + sizeof(struct sockaddr_in6
));
403 /* 40 1K datagrams */
406 * sysctl related items.
408 SYSCTL_NODE(_net
, PF_INET6
, inet6
, CTLFLAG_RW
, 0,
412 SYSCTL_NODE(_net_inet6
, IPPROTO_IPV6
, ip6
, CTLFLAG_RW
, 0, "IP6");
413 SYSCTL_NODE(_net_inet6
, IPPROTO_ICMPV6
, icmp6
, CTLFLAG_RW
, 0, "ICMP6");
414 SYSCTL_NODE(_net_inet6
, IPPROTO_UDP
, udp6
, CTLFLAG_RW
, 0, "UDP6");
415 SYSCTL_NODE(_net_inet6
, IPPROTO_TCP
, tcp6
, CTLFLAG_RW
, 0, "TCP6");
419 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS
)
424 error
= SYSCTL_OUT(req
, arg1
, sizeof(int));
425 if (error
|| !req
->newptr
)
427 old
= ip6_temp_preferred_lifetime
;
428 error
= SYSCTL_IN(req
, arg1
, sizeof(int));
429 if (ip6_temp_preferred_lifetime
<
430 ip6_desync_factor
+ ip6_temp_regen_advance
) {
431 ip6_temp_preferred_lifetime
= old
;
438 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS
)
443 error
= SYSCTL_OUT(req
, arg1
, sizeof(int));
444 if (error
|| !req
->newptr
)
446 old
= ip6_temp_valid_lifetime
;
447 error
= SYSCTL_IN(req
, arg1
, sizeof(int));
448 if (ip6_temp_valid_lifetime
< ip6_temp_preferred_lifetime
) {
449 ip6_temp_preferred_lifetime
= old
;
455 SYSCTL_INT(_net_inet6_ip6
, IPV6CTL_FORWARDING
, forwarding
, CTLFLAG_RW
,
456 &ip6_forwarding
, 0, "Enable IP forwarding between interfaces");
457 SYSCTL_INT(_net_inet6_ip6
, IPV6CTL_SENDREDIRECTS
, redirect
, CTLFLAG_RW
,
458 &ip6_sendredirects
, 0, "Enable sending IP redirects");
459 SYSCTL_INT(_net_inet6_ip6
, IPV6CTL_DEFHLIM
,
460 hlim
, CTLFLAG_RW
, &ip6_defhlim
, 0, "Default hop limit");
461 SYSCTL_INT(_net_inet6_ip6
, IPV6CTL_MINHLIM
,
462 minhlim
, CTLFLAG_RW
, &ip6_minhlim
, 0, "Default hop limit");
463 SYSCTL_STRUCT(_net_inet6_ip6
, IPV6CTL_STATS
, stats
, CTLFLAG_RD
,
464 &ip6stat
, ip6stat
, "IP stats");
465 SYSCTL_INT(_net_inet6_ip6
, IPV6CTL_MAXFRAGPACKETS
, maxfragpackets
,
466 CTLFLAG_RW
, &ip6_maxfragpackets
, 0, "Maximum packets in reassembly queue");
467 SYSCTL_INT(_net_inet6_ip6
, IPV6CTL_ACCEPT_RTADV
, accept_rtadv
,
468 CTLFLAG_RW
, &ip6_accept_rtadv
, 0,
469 "Default value of per-interface flag for accepting "
470 "ICMPv6 Router Advertisement messages");
471 SYSCTL_INT(_net_inet6_ip6
, IPV6CTL_LOG_INTERVAL
, log_interval
,
472 CTLFLAG_RW
, &ip6_log_interval
, 0, "");
473 SYSCTL_INT(_net_inet6_ip6
, IPV6CTL_HDRNESTLIMIT
, hdrnestlimit
, CTLFLAG_RW
,
474 &ip6_hdrnestlimit
, 0, "Upper limit of # of extension headers");
475 SYSCTL_INT(_net_inet6_ip6
, IPV6CTL_DAD_COUNT
, dad_count
, CTLFLAG_RW
,
476 &ip6_dad_count
, 0, "Number of times to perform duplicate address detectione");
477 SYSCTL_INT(_net_inet6_ip6
, IPV6CTL_AUTO_FLOWLABEL
, auto_flowlabel
, CTLFLAG_RW
,
478 &ip6_auto_flowlabel
, 0, "Enable attaching flowlabel automatically");
479 SYSCTL_INT(_net_inet6_ip6
, IPV6CTL_DEFMCASTHLIM
, defmcasthlim
, CTLFLAG_RW
,
480 &ip6_defmcasthlim
, 0, "Default multicast hop limit");
481 SYSCTL_INT(_net_inet6_ip6
, IPV6CTL_GIF_HLIM
, gifhlim
, CTLFLAG_RW
,
482 &ip6_gif_hlim
, 0, "Hop limit for gif encap packet");
483 SYSCTL_STRING(_net_inet6_ip6
, IPV6CTL_KAME_VERSION
, kame_version
,
484 CTLFLAG_RD
, __KAME_VERSION
, 0, "KAME version");
485 SYSCTL_INT(_net_inet6_ip6
, IPV6CTL_USE_DEPRECATED
, use_deprecated
, CTLFLAG_RW
,
486 &ip6_use_deprecated
, 0, "Allow deprecated addr as source");
487 SYSCTL_INT(_net_inet6_ip6
, IPV6CTL_RR_PRUNE
, rr_prune
, CTLFLAG_RW
,
488 &ip6_rr_prune
, 0, "Walk timer for router renumbering");
489 SYSCTL_INT(_net_inet6_ip6
, IPV6CTL_USETEMPADDR
, use_tempaddr
, CTLFLAG_RW
,
490 &ip6_use_tempaddr
, 0, "Whether to use temporary addresses");
491 SYSCTL_OID(_net_inet6_ip6
, IPV6CTL_TEMPPLTIME
, temppltime
,
492 CTLTYPE_INT
|CTLFLAG_RW
, &ip6_temp_preferred_lifetime
, 0,
493 sysctl_ip6_temppltime
, "I",
494 "Preferred lifetime for tmpaddrs");
495 SYSCTL_OID(_net_inet6_ip6
, IPV6CTL_TEMPVLTIME
, tempvltime
,
496 CTLTYPE_INT
|CTLFLAG_RW
, &ip6_temp_valid_lifetime
, 0,
497 sysctl_ip6_tempvltime
, "I",
498 "Valid lifetime for tmpaddrs");
499 SYSCTL_INT(_net_inet6_ip6
, IPV6CTL_AUTO_LINKLOCAL
, auto_linklocal
,
500 CTLFLAG_RW
, &ip6_auto_linklocal
, 0,
501 "Default value of per-interface flag for auto-assigning "
502 "a link-local address");
503 SYSCTL_STRUCT(_net_inet6_ip6
, IPV6CTL_RIP6STATS
, rip6stats
, CTLFLAG_RD
,
504 &rip6stat
, rip6stat
, "Raw stats");
505 SYSCTL_INT(_net_inet6_ip6
, IPV6CTL_MAXFRAGS
, maxfrags
, CTLFLAG_RW
,
506 &ip6_maxfrags
, 0, "Maximum fragments in reassembly queues");
508 /* net.inet6.icmp6 */
509 SYSCTL_INT(_net_inet6_icmp6
, ICMPV6CTL_REDIRACCEPT
, rediraccept
, CTLFLAG_RW
,
510 &icmp6_rediraccept
, 0, "If enabled, accept and process redirects");
511 SYSCTL_INT(_net_inet6_icmp6
, ICMPV6CTL_REDIRTIMEOUT
, redirtimeout
, CTLFLAG_RW
,
512 &icmp6_redirtimeout
, 0, "Cache time for redirect routes");
513 SYSCTL_STRUCT(_net_inet6_icmp6
, ICMPV6CTL_STATS
, stats
, CTLFLAG_RD
,
514 &icmp6stat
, icmp6stat
, "Stats");
515 SYSCTL_INT(_net_inet6_icmp6
, ICMPV6CTL_ND6_PRUNE
, nd6_prune
, CTLFLAG_RW
,
516 &nd6_prune
, 0, "Prune interval");
517 SYSCTL_INT(_net_inet6_icmp6
, ICMPV6CTL_ND6_DELAY
, nd6_delay
, CTLFLAG_RW
,
518 &nd6_delay
, 0, "Reachability timeout for stale neighbors");
519 SYSCTL_INT(_net_inet6_icmp6
, ICMPV6CTL_ND6_UMAXTRIES
, nd6_umaxtries
, CTLFLAG_RW
,
520 &nd6_umaxtries
, 0, "Maximum unicast query");
521 SYSCTL_INT(_net_inet6_icmp6
, ICMPV6CTL_ND6_MMAXTRIES
, nd6_mmaxtries
, CTLFLAG_RW
,
522 &nd6_mmaxtries
, 0, "Maximum multicast query");
523 SYSCTL_INT(_net_inet6_icmp6
, ICMPV6CTL_ND6_USELOOPBACK
, nd6_useloopback
, CTLFLAG_RW
,
524 &nd6_useloopback
, 0, "Use loopback interface for local traffic");
525 SYSCTL_INT(_net_inet6_icmp6
, ICMPV6CTL_NODEINFO
,
526 nodeinfo
, CTLFLAG_RW
, &icmp6_nodeinfo
, 0, "Enable/disable NI response");
527 SYSCTL_INT(_net_inet6_icmp6
, ICMPV6CTL_ERRPPSLIMIT
,
528 errppslimit
, CTLFLAG_RW
, &icmp6errppslim
, 0,
529 "ICMPv6 error maximum packet-per-second value (default: 100pps)");
530 SYSCTL_INT(_net_inet6_icmp6
, ICMPV6CTL_ND6_MAXNUDHINT
, nd6_maxnudhint
, CTLFLAG_RW
,
531 &nd6_maxnudhint
, 0, "Max # of subsequent upper layer hints");
532 SYSCTL_INT(_net_inet6_icmp6
, ICMPV6CTL_ND6_DEBUG
, nd6_debug
, CTLFLAG_RW
,
533 &nd6_debug
, 0, "Enable debug output");
534 SYSCTL_INT(_net_inet6_icmp6
, ICMPV6CTL_ND6_ONLINKNSRFC4861
, nd6_onlink_ns_rfc4861
, CTLFLAG_RW
,
535 &nd6_onlink_ns_rfc4861
, 0, "Accept 'on-link' NS/NA in compliance with RFC 4861.");