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 1.5 2004/03/06 01:58:56 hsu 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"
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>
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 * 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 ip6protosw inet6sw[] = {
154 { 0, &inet6domain, IPPROTO_IPV6, 0,
157 ip6_init, 0, frag6_slowtimo, frag6_drain,
160 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR,
161 udp6_input, 0, udp6_ctlinput, ip6_ctloutput,
166 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN,
167 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput,
169 #ifdef INET /* don't call initialization and timeout routines twice */
172 tcp_init, tcp_fasttimo, tcp_slowtimo, tcp_drain,
176 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR,
177 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput,
182 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
183 icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput,
185 icmp6_init, icmp6_fasttimo, 0, 0,
188 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS, PR_ATOMIC|PR_ADDR,
189 dest6_input, 0, 0, 0,
194 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING, PR_ATOMIC|PR_ADDR,
195 route6_input, 0, 0, 0,
200 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT, PR_ATOMIC|PR_ADDR,
201 frag6_input, 0, 0, 0,
207 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR,
214 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR,
223 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
224 ipcomp6_input, 0, 0, 0,
231 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
232 encap6_input, rip6_output, 0, rip6_ctloutput,
238 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
239 encap6_input, rip6_output, 0, rip6_ctloutput,
244 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
245 pim6_input, rip6_output, 0, rip6_ctloutput,
251 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR,
252 rip6_input, rip6_output, 0, rip6_ctloutput,
259 extern int in6_inithead (void **, int);
261 struct domain inet6domain =
262 { AF_INET6, "internet6", 0, 0, 0,
263 (struct protosw *)inet6sw,
264 (struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 0,
266 offsetof(struct sockaddr_in6, sin6_addr) << 3,
267 sizeof(struct sockaddr_in6) };
272 * Internet configuration info
274 #ifndef IPV6FORWARDING
276 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */
278 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
279 #endif /* GATEWAY6 */
280 #endif /* !IPV6FORWARDING */
282 #ifndef IPV6_SENDREDIRECTS
283 #define IPV6_SENDREDIRECTS 1
286 int ip6_forwarding = IPV6FORWARDING; /* act as router? */
287 int ip6_sendredirects = IPV6_SENDREDIRECTS;
288 int ip6_defhlim = IPV6_DEFHLIM;
289 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
290 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */
291 int ip6_maxfragpackets; /* initialized in frag6.c:frag6_init() */
292 int ip6_log_interval = 5;
293 int ip6_hdrnestlimit = 50; /* appropriate? */
294 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */
295 u_int32_t ip6_flow_seq;
296 int ip6_auto_flowlabel = 1;
297 int ip6_gif_hlim = 0;
298 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */
299 int ip6_rr_prune = 5; /* router renumbering prefix
300 * walk list every 5 sec. */
303 u_int32_t ip6_id = 0UL;
304 int ip6_keepfaith = 0;
305 time_t ip6_log_time = (time_t)0L;
309 * BSDI4 defines these variables in in_proto.c...
310 * XXX: what if we don't define INET? Should we define pmtu6_expire
311 * or so? (jinmei@kame.net 19990310)
313 int pmtu_expire = 60*10;
314 int pmtu_probe = 60*2;
316 /* raw IP6 parameters */
318 * Nominal space allocated to a raw ip socket.
320 #define RIPV6SNDQ 8192
321 #define RIPV6RCVQ 8192
323 u_long rip6_sendspace = RIPV6SNDQ;
324 u_long rip6_recvspace = RIPV6RCVQ;
326 /* ICMPV6 parameters */
327 int icmp6_rediraccept = 1; /* accept and process redirects */
328 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */
329 int icmp6errppslim = 100; /* 100pps */
330 int icmp6_nodeinfo = 3; /* enable/disable NI response */
332 /* UDP on IP6 parameters */
333 int udp6_sendspace = 9216; /* really max datagram size */
334 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
335 /* 40 1K datagrams */
338 * sysctl related items.
340 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW, 0,
344 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW, 0, "IP6");
345 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW, 0, "ICMP6");
346 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW, 0, "UDP6");
347 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW, 0, "TCP6");
349 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW, 0, "IPSEC6");
354 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
359 error = SYSCTL_OUT(req, arg1, sizeof(int));
360 if (error || !req->newptr)
362 old = ip6_temp_preferred_lifetime;
363 error = SYSCTL_IN(req, arg1, sizeof(int));
364 if (ip6_temp_preferred_lifetime <
365 ip6_desync_factor + ip6_temp_regen_advance) {
366 ip6_temp_preferred_lifetime = old;
373 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
378 error = SYSCTL_OUT(req, arg1, sizeof(int));
379 if (error || !req->newptr)
381 old = ip6_temp_valid_lifetime;
382 error = SYSCTL_IN(req, arg1, sizeof(int));
383 if (ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) {
384 ip6_temp_preferred_lifetime = old;
390 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING,
391 forwarding, CTLFLAG_RW, &ip6_forwarding, 0, "");
392 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS,
393 redirect, CTLFLAG_RW, &ip6_sendredirects, 0, "");
394 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
395 hlim, CTLFLAG_RW, &ip6_defhlim, 0, "");
396 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RD,
397 &ip6stat, ip6stat, "");
398 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS,
399 maxfragpackets, CTLFLAG_RW, &ip6_maxfragpackets, 0, "");
400 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
401 accept_rtadv, CTLFLAG_RW, &ip6_accept_rtadv, 0, "");
402 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
403 keepfaith, CTLFLAG_RW, &ip6_keepfaith, 0, "");
404 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
405 log_interval, CTLFLAG_RW, &ip6_log_interval, 0, "");
406 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT,
407 hdrnestlimit, CTLFLAG_RW, &ip6_hdrnestlimit, 0, "");
408 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT,
409 dad_count, CTLFLAG_RW, &ip6_dad_count, 0, "");
410 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL,
411 auto_flowlabel, CTLFLAG_RW, &ip6_auto_flowlabel, 0, "");
412 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM,
413 defmcasthlim, CTLFLAG_RW, &ip6_defmcasthlim, 0, "");
414 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM,
415 gifhlim, CTLFLAG_RW, &ip6_gif_hlim, 0, "");
416 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
417 kame_version, CTLFLAG_RD, __KAME_VERSION, 0, "");
418 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED,
419 use_deprecated, CTLFLAG_RW, &ip6_use_deprecated, 0, "");
420 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
421 rr_prune, CTLFLAG_RW, &ip6_rr_prune, 0, "");
422 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR,
423 use_tempaddr, CTLFLAG_RW, &ip6_use_tempaddr, 0, "");
424 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
425 CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_preferred_lifetime, 0,
426 sysctl_ip6_temppltime, "I", "");
427 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
428 CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_valid_lifetime, 0,
429 sysctl_ip6_tempvltime, "I", "");
430 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY,
431 v6only, CTLFLAG_RW, &ip6_v6only, 0, "");
432 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL,
433 auto_linklocal, CTLFLAG_RW, &ip6_auto_linklocal, 0, "");
434 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD,
435 &rip6stat, rip6stat, "");
437 /* net.inet6.icmp6 */
438 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT,
439 rediraccept, CTLFLAG_RW, &icmp6_rediraccept, 0, "");
440 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT,
441 redirtimeout, CTLFLAG_RW, &icmp6_redirtimeout, 0, "");
442 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD,
443 &icmp6stat, icmp6stat, "");
444 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE,
445 nd6_prune, CTLFLAG_RW, &nd6_prune, 0, "");
446 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY,
447 nd6_delay, CTLFLAG_RW, &nd6_delay, 0, "");
448 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES,
449 nd6_umaxtries, CTLFLAG_RW, &nd6_umaxtries, 0, "");
450 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES,
451 nd6_mmaxtries, CTLFLAG_RW, &nd6_mmaxtries, 0, "");
452 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK,
453 nd6_useloopback, CTLFLAG_RW, &nd6_useloopback, 0, "");
454 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO,
455 nodeinfo, CTLFLAG_RW, &icmp6_nodeinfo, 0, "");
456 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT,
457 errppslimit, CTLFLAG_RW, &icmp6errppslim, 0, "");
458 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT,
459 nd6_maxnudhint, CTLFLAG_RW, &nd6_maxnudhint, 0, "");
460 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG,
461 nd6_debug, CTLFLAG_RW, &nd6_debug, 0, "");