Annotation of sys/netinet6/in6_proto.c, Revision 1.1.1.1
1.1 nbrk 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 */
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