1 /* $FreeBSD: releng/5.1/sys/netinet6/in6_proto.c 105199 2002-10-16 02:25:05Z sam $ */
2 /* $KAME: in6_proto.c,v 1.91 2001/05/27 13:28:35 itojun Exp $ */
3
4 /*
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
19 *
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
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 /*
34 * Copyright (c) 1982, 1986, 1993
35 * The Regents of the University of California. All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 * 3. All advertising materials mentioning features or use of this software
46 * must display the following acknowledgement:
47 * This product includes software developed by the University of
48 * California, Berkeley and its contributors.
49 * 4. Neither the name of the University nor the names of its contributors
50 * may be used to endorse or promote products derived from this software
51 * without specific prior written permission.
52 *
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
56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
63 * SUCH DAMAGE.
64 *
65 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93
66 */
67
68 #include "opt_inet.h"
69 #include "opt_inet6.h"
70 #include "opt_ipsec.h"
71
72 #include <sys/param.h>
73 #include <sys/socket.h>
74 #include <sys/socketvar.h>
75 #include <sys/protosw.h>
76 #include <sys/kernel.h>
77 #include <sys/domain.h>
78 #include <sys/mbuf.h>
79 #include <sys/systm.h>
80 #include <sys/sysctl.h>
81
82 #include <net/if.h>
83 #include <net/radix.h>
84 #include <net/route.h>
85
86 #include <netinet/in.h>
87 #include <netinet/in_systm.h>
88 #include <netinet/in_var.h>
89 #include <netinet/ip_encap.h>
90 #include <netinet/ip.h>
91 #include <netinet/ip_var.h>
92 #include <netinet/ip6.h>
93 #include <netinet6/ip6_var.h>
94 #include <netinet/icmp6.h>
95
96 #include <netinet/tcp.h>
97 #include <netinet/tcp_timer.h>
98 #include <netinet/tcp_var.h>
99 #include <netinet/udp.h>
100 #include <netinet/udp_var.h>
101 #include <netinet6/tcp6_var.h>
102 #include <netinet6/raw_ip6.h>
103 #include <netinet6/udp6_var.h>
104 #include <netinet6/pim6_var.h>
105 #include <netinet6/nd6.h>
106 #include <netinet6/in6_prefix.h>
107
108 #ifdef IPSEC
109 #include <netinet6/ipsec.h>
110 #ifdef INET6
111 #include <netinet6/ipsec6.h>
112 #endif
113 #include <netinet6/ah.h>
114 #ifdef INET6
115 #include <netinet6/ah6.h>
116 #endif
117 #ifdef IPSEC_ESP
118 #include <netinet6/esp.h>
119 #ifdef INET6
120 #include <netinet6/esp6.h>
121 #endif
122 #endif
123 #include <netinet6/ipcomp.h>
124 #ifdef INET6
125 #include <netinet6/ipcomp6.h>
126 #endif
127 #endif /* IPSEC */
128
129 #ifdef FAST_IPSEC
130 #include <netipsec/ipsec6.h>
131 #define IPSEC
132 #define IPSEC_ESP
133 #define ah6_input ipsec6_common_input
134 #define esp6_input ipsec6_common_input
135 #define ipcomp6_input ipsec6_common_input
136 #endif /* FAST_IPSEC */
137
138 #include <netinet6/ip6protosw.h>
139
140 #include <net/net_osdep.h>
141
142 /*
143 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
144 */
145
146 extern struct domain inet6domain;
147 static struct pr_usrreqs nousrreqs;
148
149 #define PR_LISTEN 0
150 #define PR_ABRTACPTDIS 0
151
152 struct ip6protosw inet6sw[] = {
153 { 0, &inet6domain, IPPROTO_IPV6, 0,
154 0, 0, 0, 0,
155 0,
156 ip6_init, 0, frag6_slowtimo, frag6_drain,
157 &nousrreqs,
158 },
159 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR,
160 udp6_input, 0, udp6_ctlinput, ip6_ctloutput,
161 0,
162 0, 0, 0, 0,
163 &udp6_usrreqs,
164 },
165 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN,
166 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput,
167 0,
168 #ifdef INET /* don't call initialization and timeout routines twice */
169 0, 0, 0, tcp_drain,
170 #else
171 tcp_init, tcp_fasttimo, tcp_slowtimo, tcp_drain,
172 #endif
173 &tcp6_usrreqs,
174 },
175 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR,
176 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput,
177 0,
178 0, 0, 0, 0,
179 &rip6_usrreqs
180 },
181 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
182 icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput,
183 0,
184 icmp6_init, icmp6_fasttimo, 0, 0,
185 &rip6_usrreqs
186 },
187 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR,
188 dest6_input, 0, 0, 0,
189 0,
190 0, 0, 0, 0,
191 &nousrreqs
192 },
193 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR,
194 route6_input, 0, 0, 0,
195 0,
196 0, 0, 0, 0,
197 &nousrreqs
198 },
199 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR,
200 frag6_input, 0, 0, 0,
201 0,
202 0, 0, 0, 0,
203 &nousrreqs
204 },
205 #ifdef IPSEC
206 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR,
207 ah6_input, 0, 0, 0,
208 0,
209 0, 0, 0, 0,
210 &nousrreqs,
211 },
212 #ifdef IPSEC_ESP
213 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR,
214 esp6_input, 0,
215 esp6_ctlinput,
216 0,
217 0,
218 0, 0, 0, 0,
219 &nousrreqs,
220 },
221 #endif
222 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
223 ipcomp6_input, 0, 0, 0,
224 0,
225 0, 0, 0, 0,
226 &nousrreqs,
227 },
228 #endif /* IPSEC */
229 #ifdef INET
230 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
231 encap6_input, rip6_output, 0, rip6_ctloutput,
232 0,
233 encap_init, 0, 0, 0,
234 &rip6_usrreqs
235 },
236 #endif /* INET */
237 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
238 encap6_input, rip6_output, 0, rip6_ctloutput,
239 0,
240 encap_init, 0, 0, 0,
241 &rip6_usrreqs
242 },
243 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
244 pim6_input, rip6_output, 0, rip6_ctloutput,
245 0,
246 0, 0, 0, 0,
247 &rip6_usrreqs
248 },
249 /* raw wildcard */
250 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR,
251 rip6_input, rip6_output, 0, rip6_ctloutput,
252 0,
253 0, 0, 0, 0,
254 &rip6_usrreqs
255 },
256 };
257
258 extern int in6_inithead __P((void **, int));
259
260 struct domain inet6domain =
261 { AF_INET6, "internet6", 0, 0, 0,
262 (struct protosw *)inet6sw,
263 (struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 0,
264 in6_inithead,
265 offsetof(struct sockaddr_in6, sin6_addr) << 3,
266 sizeof(struct sockaddr_in6) };
267
268 DOMAIN_SET(inet6);
269
270 /*
271 * Internet configuration info
272 */
273 #ifndef IPV6FORWARDING
274 #ifdef GATEWAY6
275 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */
276 #else
277 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
278 #endif /* GATEWAY6 */
279 #endif /* !IPV6FORWARDING */
280
281 #ifndef IPV6_SENDREDIRECTS
282 #define IPV6_SENDREDIRECTS 1
283 #endif
284
285 int ip6_forwarding = IPV6FORWARDING; /* act as router? */
286 int ip6_sendredirects = IPV6_SENDREDIRECTS;
287 int ip6_defhlim = IPV6_DEFHLIM;
288 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
289 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */
290 int ip6_maxfragpackets; /* initialized in frag6.c:frag6_init() */
291 int ip6_log_interval = 5;
292 int ip6_hdrnestlimit = 50; /* appropriate? */
293 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */
294 u_int32_t ip6_flow_seq;
295 int ip6_auto_flowlabel = 1;
296 int ip6_gif_hlim = 0;
297 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */
298 int ip6_rr_prune = 5; /* router renumbering prefix
299 * walk list every 5 sec. */
300 int ip6_v6only = 1;
301
302 u_int32_t ip6_id = 0UL;
303 int ip6_keepfaith = 0;
304 time_t ip6_log_time = (time_t)0L;
305
306 /* icmp6 */
307 /*
308 * BSDI4 defines these variables in in_proto.c...
309 * XXX: what if we don't define INET? Should we define pmtu6_expire
310 * or so? (jinmei@kame.net 19990310)
311 */
312 int pmtu_expire = 60*10;
313 int pmtu_probe = 60*2;
314
315 /* raw IP6 parameters */
316 /*
317 * Nominal space allocated to a raw ip socket.
318 */
319 #define RIPV6SNDQ 8192
320 #define RIPV6RCVQ 8192
321
322 u_long rip6_sendspace = RIPV6SNDQ;
323 u_long rip6_recvspace = RIPV6RCVQ;
324
325 /* ICMPV6 parameters */
326 int icmp6_rediraccept = 1; /* accept and process redirects */
327 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */
328 int icmp6errppslim = 100; /* 100pps */
329 int icmp6_nodeinfo = 3; /* enable/disable NI response */
330
331 /* UDP on IP6 parameters */
332 int udp6_sendspace = 9216; /* really max datagram size */
333 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
334 /* 40 1K datagrams */
335
336 /*
337 * sysctl related items.
338 */
339 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW, 0,
340 "Internet6 Family");
341
342 /* net.inet6 */
343 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW, 0, "IP6");
344 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW, 0, "ICMP6");
345 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW, 0, "UDP6");
346 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW, 0, "TCP6");
347 #ifdef IPSEC
348 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW, 0, "IPSEC6");
349 #endif /* IPSEC */
350
351 /* net.inet6.ip6 */
352 static int
353 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
354 {
355 int error = 0;
356 int old;
357
358 error = SYSCTL_OUT(req, arg1, sizeof(int));
359 if (error || !req->newptr)
360 return (error);
361 old = ip6_temp_preferred_lifetime;
362 error = SYSCTL_IN(req, arg1, sizeof(int));
363 if (ip6_temp_preferred_lifetime <
364 ip6_desync_factor + ip6_temp_regen_advance) {
365 ip6_temp_preferred_lifetime = old;
366 return(EINVAL);
367 }
368 return(error);
369 }
370
371 static int
372 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
373 {
374 int error = 0;
375 int old;
376
377 error = SYSCTL_OUT(req, arg1, sizeof(int));
378 if (error || !req->newptr)
379 return (error);
380 old = ip6_temp_valid_lifetime;
381 error = SYSCTL_IN(req, arg1, sizeof(int));
382 if (ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) {
383 ip6_temp_preferred_lifetime = old;
384 return(EINVAL);
385 }
386 return(error);
387 }
388
389 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING,
390 forwarding, CTLFLAG_RW, &ip6_forwarding, 0, "");
391 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS,
392 redirect, CTLFLAG_RW, &ip6_sendredirects, 0, "");
393 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
394 hlim, CTLFLAG_RW, &ip6_defhlim, 0, "");
395 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RD,
396 &ip6stat, ip6stat, "");
397 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS,
398 maxfragpackets, CTLFLAG_RW, &ip6_maxfragpackets, 0, "");
399 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
400 accept_rtadv, CTLFLAG_RW, &ip6_accept_rtadv, 0, "");
401 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
402 keepfaith, CTLFLAG_RW, &ip6_keepfaith, 0, "");
403 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
404 log_interval, CTLFLAG_RW, &ip6_log_interval, 0, "");
405 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT,
406 hdrnestlimit, CTLFLAG_RW, &ip6_hdrnestlimit, 0, "");
407 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT,
408 dad_count, CTLFLAG_RW, &ip6_dad_count, 0, "");
409 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL,
410 auto_flowlabel, CTLFLAG_RW, &ip6_auto_flowlabel, 0, "");
411 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM,
412 defmcasthlim, CTLFLAG_RW, &ip6_defmcasthlim, 0, "");
413 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM,
414 gifhlim, CTLFLAG_RW, &ip6_gif_hlim, 0, "");
415 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
416 kame_version, CTLFLAG_RD, __KAME_VERSION, 0, "");
417 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED,
418 use_deprecated, CTLFLAG_RW, &ip6_use_deprecated, 0, "");
419 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
420 rr_prune, CTLFLAG_RW, &ip6_rr_prune, 0, "");
421 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR,
422 use_tempaddr, CTLFLAG_RW, &ip6_use_tempaddr, 0, "");
423 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
424 CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_preferred_lifetime, 0,
425 sysctl_ip6_temppltime, "I", "");
426 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
427 CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_valid_lifetime, 0,
428 sysctl_ip6_tempvltime, "I", "");
429 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY,
430 v6only, CTLFLAG_RW, &ip6_v6only, 0, "");
431 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL,
432 auto_linklocal, CTLFLAG_RW, &ip6_auto_linklocal, 0, "");
433 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD,
434 &rip6stat, rip6stat, "");
435
436 /* net.inet6.icmp6 */
437 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT,
438 rediraccept, CTLFLAG_RW, &icmp6_rediraccept, 0, "");
439 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT,
440 redirtimeout, CTLFLAG_RW, &icmp6_redirtimeout, 0, "");
441 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD,
442 &icmp6stat, icmp6stat, "");
443 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE,
444 nd6_prune, CTLFLAG_RW, &nd6_prune, 0, "");
445 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY,
446 nd6_delay, CTLFLAG_RW, &nd6_delay, 0, "");
447 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES,
448 nd6_umaxtries, CTLFLAG_RW, &nd6_umaxtries, 0, "");
449 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES,
450 nd6_mmaxtries, CTLFLAG_RW, &nd6_mmaxtries, 0, "");
451 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK,
452 nd6_useloopback, CTLFLAG_RW, &nd6_useloopback, 0, "");
453 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO,
454 nodeinfo, CTLFLAG_RW, &icmp6_nodeinfo, 0, "");
455 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT,
456 errppslimit, CTLFLAG_RW, &icmp6errppslim, 0, "");
457 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT,
458 nd6_maxnudhint, CTLFLAG_RW, &nd6_maxnudhint, 0, "");
459 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG,
460 nd6_debug, CTLFLAG_RW, &nd6_debug, 0, "");
Cache object: b1e232dc8fc6d4a5824559190b79f566
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