1 /* $OpenBSD: in6_proto.c,v 1.52 2007/05/03 15:47:47 claudio 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/param.h>
65 #include <sys/socket.h>
66 #include <sys/protosw.h>
67 #include <sys/kernel.h>
68 #include <sys/domain.h>
69 #include <sys/mbuf.h>
70
71 #include <net/if.h>
72 #include <net/radix.h>
73 #ifndef SMALL_KERNEL
74 #include <net/radix_mpath.h>
75 #endif
76 #include <net/route.h>
77
78 #include <netinet/in.h>
79 #include <netinet/in_systm.h>
80 #include <netinet/in_var.h>
81 #include <netinet/ip.h>
82 #include <netinet/ip_var.h>
83 #include <netinet/in_pcb.h>
84 #include <netinet/ip6.h>
85 #include <netinet6/ip6_var.h>
86 #include <netinet/icmp6.h>
87
88 #include <netinet/tcp.h>
89 #include <netinet/tcp_timer.h>
90 #include <netinet/tcp_var.h>
91 #include <netinet/udp.h>
92 #include <netinet/udp_var.h>
93 #include <netinet/ip_ipsp.h>
94 #include <netinet/ip_ah.h>
95 #include <netinet/ip_esp.h>
96 #include <netinet/ip_ipip.h>
97
98 #ifdef MROUTING
99 #include <netinet6/pim6_var.h>
100 #endif
101
102 #include <netinet6/nd6.h>
103
104 #include <netinet6/ip6protosw.h>
105
106 #include "gif.h"
107 #if NGIF > 0
108 #include <netinet6/in6_gif.h>
109 #endif
110
111 #include "carp.h"
112 #if NCARP > 0
113 #include <netinet/ip_carp.h>
114 #endif
115
116 /*
117 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
118 */
119
120 extern struct domain inet6domain;
121
122 struct ip6protosw inet6sw[] = {
123 { 0, &inet6domain, IPPROTO_IPV6, 0,
124 0, 0, 0, 0,
125 0,
126 ip6_init, 0, frag6_slowtimo, frag6_drain,
127 ip6_sysctl,
128 },
129 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR,
130 udp6_input, 0, udp6_ctlinput, ip6_ctloutput,
131 udp6_usrreq, 0,
132 0, 0, 0,
133 udp_sysctl,
134 },
135 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_ABRTACPTDIS,
136 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput,
137 tcp6_usrreq,
138 #ifdef INET /* don't call initialization and timeout routines twice */
139 0, 0, 0, tcp_drain,
140 #else
141 tcp_init, tcp_fasttimo, tcp_slowtimo, tcp_drain,
142 #endif
143 tcp_sysctl,
144 },
145 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR,
146 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput,
147 rip6_usrreq,
148 0, 0, 0, 0,
149 },
150 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR,
151 icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput,
152 rip6_usrreq,
153 icmp6_init, icmp6_fasttimo, 0, 0,
154 icmp6_sysctl,
155 },
156 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR,
157 dest6_input, 0, 0, 0,
158 0,
159 0, 0, 0, 0,
160 },
161 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR,
162 route6_input, 0, 0, 0,
163 0,
164 0, 0, 0, 0,
165 },
166 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR,
167 frag6_input, 0, 0, 0,
168 0,
169 0, 0, 0, 0,
170 },
171 #ifdef IPSEC
172 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR,
173 ah6_input, 0, 0, 0,
174 0,
175 0, 0, 0, 0,
176 ah_sysctl,
177 },
178 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR,
179 esp6_input, 0, 0, 0,
180 0,
181 0, 0, 0, 0,
182 esp_sysctl,
183 },
184 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
185 ipcomp6_input, 0, 0, 0,
186 0,
187 0, 0, 0, 0,
188 ipcomp_sysctl,
189 },
190 #endif /* IPSEC */
191 #if NGIF > 0
192 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR,
193 in6_gif_input, rip6_output, 0, rip6_ctloutput,
194 rip6_usrreq, /* XXX */
195 0, 0, 0, 0,
196 },
197 #ifdef INET
198 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR,
199 in6_gif_input, rip6_output, 0, rip6_ctloutput,
200 rip6_usrreq, /* XXX */
201 0, 0, 0, 0,
202 },
203 #endif /* INET */
204 #else /* NGIF */
205 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR,
206 ip4_input6, rip6_output, 0, rip6_ctloutput,
207 rip6_usrreq, /* XXX */
208 0, 0, 0, 0, ipip_sysctl
209 },
210 #ifdef INET
211 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR,
212 ip4_input6, rip6_output, 0, rip6_ctloutput,
213 rip6_usrreq, /* XXX */
214 0, 0, 0, 0,
215 },
216 #endif /* INET */
217 #endif /* GIF */
218 #ifdef MROUTING
219 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR,
220 pim6_input, rip6_output, 0, rip6_ctloutput,
221 rip6_usrreq,
222 0, 0, 0, 0,
223 },
224 #endif
225 #if NCARP > 0
226 { SOCK_RAW, &inet6domain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR,
227 carp6_proto_input, rip6_output, 0, rip6_ctloutput,
228 rip6_usrreq,
229 0, 0, 0, 0, carp_sysctl
230 },
231 #endif /* NCARP */
232 /* raw wildcard */
233 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR,
234 rip6_input, rip6_output, 0, rip6_ctloutput,
235 rip6_usrreq, rip6_init,
236 0, 0, 0,
237 },
238 };
239
240 struct domain inet6domain =
241 { AF_INET6, "internet6", 0, 0, 0,
242 (struct protosw *)inet6sw,
243 (struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 0,
244 #ifndef SMALL_KERNEL
245 rn_mpath_inithead,
246 #else
247 rn_inithead,
248 #endif
249 offsetof(struct sockaddr_in6, sin6_addr) << 3,
250 sizeof(struct sockaddr_in6),
251 in6_domifattach, in6_domifdetach, };
252
253 /*
254 * Internet configuration info
255 */
256 int ip6_forwarding = 0; /* no forwarding unless sysctl'd to enable */
257 int ip6_mforwarding = 0; /* no multicast forwarding unless ... */
258 int ip6_multipath = 0; /* no using multipath routes unless ... */
259 int ip6_sendredirects = 1;
260 int ip6_defhlim = IPV6_DEFHLIM;
261 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
262 int ip6_accept_rtadv = 0; /* enabling forwarding and rtadv concurrently is dangerous */
263 int ip6_maxfragpackets = 200;
264 int ip6_maxfrags = 200;
265 int ip6_log_interval = 5;
266 int ip6_hdrnestlimit = 10; /* appropriate? */
267 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */
268 int ip6_auto_flowlabel = 1;
269 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */
270 int ip6_rr_prune = 5; /* router renumbering prefix
271 * walk list every 5 sec. */
272 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */
273 const int ip6_v6only = 1;
274 u_int32_t ip6_id = 0UL;
275 int ip6_keepfaith = 0;
276 time_t ip6_log_time = (time_t)0L;
277
278 /* icmp6 */
279 /*
280 * BSDI4 defines these variables in in_proto.c...
281 * XXX: what if we don't define INET? Should we define pmtu6_expire
282 * or so? (jinmei@kame.net 19990310)
283 */
284 int pmtu_expire = 60*10;
285
286 /* raw IP6 parameters */
287 /*
288 * Nominal space allocated to a raw ip socket.
289 */
290 #define RIPV6SNDQ 8192
291 #define RIPV6RCVQ 8192
292
293 u_long rip6_sendspace = RIPV6SNDQ;
294 u_long rip6_recvspace = RIPV6RCVQ;
295
296 /* ICMPV6 parameters */
297 int icmp6_rediraccept = 1; /* accept and process redirects */
298 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */
299 struct timeval icmp6errratelim = { 0, 0 }; /* no ratelimit */
300 int icmp6errppslim = 100; /* 100pps */
301 int icmp6_nodeinfo = 1; /* enable/disable NI response */
302
303 /* UDP on IP6 parameters */
304 int udp6_sendspace = 9216; /* really max datagram size */
305 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
306 /* 40 1K datagrams */