1 /* $NetBSD: in6_proto.c,v 1.68.2.1 2007/05/24 19:13:16 pavel Exp $ */
2 /* $KAME: in6_proto.c,v 1.66 2000/10/10 15:35:47 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. Neither the name of the University nor the names of its contributors
46 * may be used to endorse or promote products derived from this software
47 * without specific prior written permission.
48 *
49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59 * SUCH DAMAGE.
60 *
61 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93
62 */
63
64 #include <sys/cdefs.h>
65 __KERNEL_RCSID(0, "$NetBSD: in6_proto.c,v 1.68.2.1 2007/05/24 19:13:16 pavel Exp $");
66
67 #include "opt_inet.h"
68 #include "opt_ipsec.h"
69 #include "opt_iso.h"
70
71 #include <sys/param.h>
72 #include <sys/socket.h>
73 #include <sys/protosw.h>
74 #include <sys/kernel.h>
75 #include <sys/domain.h>
76 #include <sys/mbuf.h>
77
78 #include <net/if.h>
79 #include <net/radix.h>
80 #include <net/route.h>
81
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/in_pcb.h>
89 #include <netinet/ip6.h>
90 #include <netinet6/ip6_var.h>
91 #include <netinet/icmp6.h>
92 #include <netinet6/in6_pcb.h>
93
94 #include <netinet/tcp.h>
95 #include <netinet/tcp_fsm.h>
96 #include <netinet/tcp_seq.h>
97 #include <netinet/tcp_timer.h>
98 #include <netinet/tcp_var.h>
99 #include <netinet/tcpip.h>
100 #include <netinet/tcp_debug.h>
101
102 #include <netinet6/udp6.h>
103 #include <netinet6/udp6_var.h>
104
105 #include <netinet6/pim6_var.h>
106
107 #include <netinet6/nd6.h>
108
109 #ifdef IPSEC
110 #include <netinet6/ipsec.h>
111 #include <netinet6/ah.h>
112 #ifdef IPSEC_ESP
113 #include <netinet6/esp.h>
114 #endif
115 #include <netinet6/ipcomp.h>
116 #endif /* IPSEC */
117
118 #ifdef FAST_IPSEC
119 #include <netipsec/ipsec.h>
120 #include <netipsec/ipsec6.h>
121 #include <netipsec/key.h>
122 #endif /* FAST_IPSEC */
123
124
125 #include "carp.h"
126 #if NCARP > 0
127 #include <netinet/ip_carp.h>
128 #endif
129
130 #include "etherip.h"
131 #if NETHERIP > 1
132 #include <netinet6/ip6_etherip.h>
133 #endif
134
135 #include <netinet6/ip6protosw.h>
136
137 #include <net/net_osdep.h>
138
139 #ifndef offsetof /* XXX */
140 #define offsetof(type, member) ((size_t)(&((type *)0)->member))
141 #endif
142
143 /*
144 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
145 */
146
147 DOMAIN_DEFINE(inet6domain); /* forward declare and add to link set */
148
149 const struct ip6protosw inet6sw[] = {
150 { 0, &inet6domain, IPPROTO_IPV6, 0,
151 0, 0, 0, 0,
152 0,
153 ip6_init, 0, frag6_slowtimo, frag6_drain,
154 },
155 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR|PR_PURGEIF,
156 udp6_input, 0, udp6_ctlinput, ip6_ctloutput,
157 udp6_usrreq, udp6_init,
158 0, 0, 0,
159 },
160 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF,
161 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput,
162 tcp_usrreq,
163 #ifdef INET /* don't call initialization and timeout routines twice */
164 0, 0, 0, 0,
165 #else
166 tcp_init, 0, tcp_slowtimo, tcp_drain,
167 #endif
168 },
169 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR|PR_PURGEIF,
170 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput,
171 rip6_usrreq,
172 0, 0, 0, 0,
173 },
174 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
175 icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput,
176 rip6_usrreq,
177 icmp6_init, 0, 0, 0,
178 },
179 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR,
180 dest6_input, 0, 0, 0,
181 0,
182 0, 0, 0, 0,
183 },
184 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR,
185 route6_input, 0, 0, 0,
186 0,
187 0, 0, 0, 0,
188 },
189 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR,
190 frag6_input, 0, 0, 0,
191 0,
192 0, 0, 0, 0,
193 },
194 #ifdef IPSEC
195 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR,
196 ah6_input, 0, ah6_ctlinput, 0,
197 0,
198 0, 0, 0, 0,
199 },
200 #ifdef IPSEC_ESP
201 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR,
202 esp6_input, 0, esp6_ctlinput, 0,
203 0,
204 0, 0, 0, 0,
205 },
206 #endif
207 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
208 ipcomp6_input, 0, 0, 0,
209 0,
210 0, 0, 0, 0,
211 },
212 #endif /* IPSEC */
213 #ifdef FAST_IPSEC
214 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR,
215 ipsec6_common_input, 0, ah6_ctlinput, 0,
216 0,
217 0, 0, 0, 0,
218 },
219 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR,
220 ipsec6_common_input, 0, esp6_ctlinput, 0,
221 0,
222 0, 0, 0, 0,
223 },
224 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
225 ipsec6_common_input, 0, 0, 0,
226 0,
227 0, 0, 0, 0,
228 },
229 #endif /* FAST_IPSEC */
230 #ifdef INET
231 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
232 encap6_input, rip6_output, encap6_ctlinput, rip6_ctloutput,
233 rip6_usrreq,
234 encap_init, 0, 0, 0,
235 },
236 #endif
237 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
238 encap6_input, rip6_output, encap6_ctlinput, rip6_ctloutput,
239 rip6_usrreq,
240 encap_init, 0, 0, 0,
241 },
242 #if NETHERIP > 1
243 { SOCK_RAW, &inet6domain, IPPROTO_ETHERIP, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
244 ip6_etherip_input, rip6_output, rip6_ctlinput, rip6_ctloutput,
245 rip6_usrreq,
246 0, 0, 0, 0,
247 },
248 #endif
249 #if NCARP > 0
250 { SOCK_RAW, &inet6domain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR,
251 carp6_proto_input, rip6_output, 0, rip6_ctloutput,
252 rip6_usrreq,
253 0, 0, 0, 0,
254 },
255 #endif /* NCARP */
256 #ifdef ISO
257 { SOCK_RAW, &inet6domain, IPPROTO_EON, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
258 encap6_input, rip6_output, encap6_ctlinput, rip6_ctloutput,
259 rip6_usrreq, /*XXX*/
260 encap_init, 0, 0, 0,
261 },
262 #endif
263 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
264 pim6_input, rip6_output, 0, rip6_ctloutput,
265 rip6_usrreq,
266 0, 0, 0, 0,
267 },
268 /* raw wildcard */
269 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
270 rip6_input, rip6_output, 0, rip6_ctloutput,
271 rip6_usrreq,
272 rip6_init, 0, 0, 0,
273 },
274 };
275
276 struct domain inet6domain = {
277 AF_INET6, "internet6", NULL, NULL, NULL,
278 (const struct protosw *)inet6sw,
279 (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])],
280 rn_inithead,
281 offsetof(struct sockaddr_in6, sin6_addr) << 3,
282 sizeof(struct sockaddr_in6),
283 in6_domifattach, in6_domifdetach,
284 { &ip6intrq, NULL },
285 { NULL },
286 MOWNER_INIT("","")
287 };
288
289 /*
290 * Internet configuration info
291 */
292 #ifndef IPV6FORWARDING
293 #ifdef GATEWAY6
294 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */
295 #else
296 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
297 #endif /* GATEWAY6 */
298 #endif /* !IPV6FORWARDING */
299
300 int ip6_forwarding = IPV6FORWARDING; /* act as router? */
301 int ip6_sendredirects = 1;
302 int ip6_defhlim = IPV6_DEFHLIM;
303 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
304 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */
305 int ip6_maxfragpackets = 200;
306 int ip6_maxfrags = 200;
307 int ip6_log_interval = 5;
308 int ip6_hdrnestlimit = 50; /* appropriate? */
309 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */
310 int ip6_auto_flowlabel = 1;
311 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */
312 int ip6_rr_prune = 5; /* router renumbering prefix
313 * walk list every 5 sec. */
314 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */
315 int ip6_v6only = 1;
316
317 int ip6_keepfaith = 0;
318 time_t ip6_log_time = (time_t)0L;
319
320 /* icmp6 */
321 /*
322 * BSDI4 defines these variables in in_proto.c...
323 * XXX: what if we don't define INET? Should we define pmtu6_expire
324 * or so? (jinmei@kame.net 19990310)
325 */
326 int pmtu_expire = 60*10;
327
328 /* raw IP6 parameters */
329 /*
330 * Nominal space allocated to a raw ip socket.
331 */
332 #define RIPV6SNDQ 8192
333 #define RIPV6RCVQ 8192
334
335 u_long rip6_sendspace = RIPV6SNDQ;
336 u_long rip6_recvspace = RIPV6RCVQ;
337
338 /* ICMPV6 parameters */
339 int icmp6_rediraccept = 1; /* accept and process redirects */
340 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */
341 int icmp6errppslim = 100; /* 100pps */
342 int icmp6_nodeinfo = 1; /* enable/disable NI response */
343
344 /* UDP on IP6 parameters */
345 int udp6_sendspace = 9216; /* really max datagram size */
346 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
347 /* 40 1K datagrams */
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