1 /* $FreeBSD: releng/5.2/sys/netinet6/ip6_var.h 122077 2003-11-04 20:22:33Z ume $ */
2 /* $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 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 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93
66 */
67
68 #ifndef _NETINET6_IP6_VAR_H_
69 #define _NETINET6_IP6_VAR_H_
70
71 /*
72 * IP6 reassembly queue structure. Each fragment
73 * being reassembled is attached to one of these structures.
74 */
75 struct ip6q {
76 u_int32_t ip6q_head;
77 u_int16_t ip6q_len;
78 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */
79 u_int8_t ip6q_hlim;
80 struct ip6asfrag *ip6q_down;
81 struct ip6asfrag *ip6q_up;
82 u_int32_t ip6q_ident;
83 u_int8_t ip6q_arrive;
84 u_int8_t ip6q_ttl;
85 struct in6_addr ip6q_src, ip6q_dst;
86 struct ip6q *ip6q_next;
87 struct ip6q *ip6q_prev;
88 int ip6q_unfrglen; /* len of unfragmentable part */
89 #ifdef notyet
90 u_char *ip6q_nxtp;
91 #endif
92 int ip6q_nfrag; /* # of fragments */
93 };
94
95 struct ip6asfrag {
96 u_int32_t ip6af_head;
97 u_int16_t ip6af_len;
98 u_int8_t ip6af_nxt;
99 u_int8_t ip6af_hlim;
100 /* must not override the above members during reassembling */
101 struct ip6asfrag *ip6af_down;
102 struct ip6asfrag *ip6af_up;
103 struct mbuf *ip6af_m;
104 int ip6af_offset; /* offset in ip6af_m to next header */
105 int ip6af_frglen; /* fragmentable part length */
106 int ip6af_off; /* fragment offset */
107 u_int16_t ip6af_mff; /* more fragment bit in frag off */
108 };
109
110 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
111
112 struct ip6_moptions {
113 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
114 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */
115 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */
116 LIST_HEAD(, in6_multi_mship) im6o_memberships;
117 };
118
119 /*
120 * Control options for outgoing packets
121 */
122
123 /* Routing header related info */
124 struct ip6po_rhinfo {
125 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
126 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */
127 };
128 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr
129 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route
130
131 /* Nexthop related info */
132 struct ip6po_nhinfo {
133 struct sockaddr *ip6po_nhi_nexthop;
134 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */
135 };
136 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop
137 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route
138
139 struct ip6_pktopts {
140 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */
141 int ip6po_hlim; /* Hoplimit for outgoing packets */
142
143 /* Outgoing IF/address information */
144 struct in6_pktinfo *ip6po_pktinfo;
145
146 /* Next-hop address information */
147 struct ip6po_nhinfo ip6po_nhinfo;
148
149 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
150
151 /* Destination options header (before a routing header) */
152 struct ip6_dest *ip6po_dest1;
153
154 /* Routing header related info. */
155 struct ip6po_rhinfo ip6po_rhinfo;
156
157 /* Destination options header (after a routing header) */
158 struct ip6_dest *ip6po_dest2;
159
160 int ip6po_tclass; /* traffic class */
161
162 int ip6po_minmtu; /* fragment vs PMTU discovery policy */
163 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/
164 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */
165 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */
166
167 int ip6po_prefer_tempaddr; /* whether temporary addresses are
168 preferred as source address */
169 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */
170 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */
171 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */
172
173 int ip6po_flags;
174 #if 0 /* parameters in this block is obsolete. do not reuse the values. */
175 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */
176 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */
177 #endif
178 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */
179 #define IP6PO_USECOA 0x08 /* use care of address */
180
181 int needfree; /* members dynamically allocated */
182 };
183
184 /*
185 * Control options for incoming packets
186 */
187
188 struct ip6stat {
189 u_quad_t ip6s_total; /* total packets received */
190 u_quad_t ip6s_tooshort; /* packet too short */
191 u_quad_t ip6s_toosmall; /* not enough data */
192 u_quad_t ip6s_fragments; /* fragments received */
193 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
194 u_quad_t ip6s_fragtimeout; /* fragments timed out */
195 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */
196 u_quad_t ip6s_forward; /* packets forwarded */
197 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */
198 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */
199 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/
200 u_quad_t ip6s_localout; /* total ip packets generated here */
201 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */
202 u_quad_t ip6s_reassembled; /* total packets reassembled ok */
203 u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */
204 u_quad_t ip6s_ofragments; /* output fragments created */
205 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
206 u_quad_t ip6s_badoptions; /* error in option processing */
207 u_quad_t ip6s_noroute; /* packets discarded due to no route */
208 u_quad_t ip6s_badvers; /* ip6 version != 6 */
209 u_quad_t ip6s_rawout; /* total raw ip packets generated */
210 u_quad_t ip6s_badscope; /* scope error */
211 u_quad_t ip6s_notmember; /* don't join this multicast group */
212 u_quad_t ip6s_nxthist[256]; /* next header history */
213 u_quad_t ip6s_m1; /* one mbuf */
214 u_quad_t ip6s_m2m[32]; /* two or more mbuf */
215 u_quad_t ip6s_mext1; /* one ext mbuf */
216 u_quad_t ip6s_mext2m; /* two or more ext mbuf */
217 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */
218 u_quad_t ip6s_nogif; /* no match gif found */
219 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */
220
221 /*
222 * statistics for improvement of the source address selection
223 * algorithm:
224 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
225 */
226 /* number of times that address selection fails */
227 u_quad_t ip6s_sources_none;
228 /* number of times that an address on the outgoing I/F is chosen */
229 u_quad_t ip6s_sources_sameif[16];
230 /* number of times that an address on a non-outgoing I/F is chosen */
231 u_quad_t ip6s_sources_otherif[16];
232 /*
233 * number of times that an address that has the same scope
234 * from the destination is chosen.
235 */
236 u_quad_t ip6s_sources_samescope[16];
237 /*
238 * number of times that an address that has a different scope
239 * from the destination is chosen.
240 */
241 u_quad_t ip6s_sources_otherscope[16];
242 /* number of times that a deprecated address is chosen */
243 u_quad_t ip6s_sources_deprecated[16];
244
245 u_quad_t ip6s_forward_cachehit;
246 u_quad_t ip6s_forward_cachemiss;
247
248 /* number of times that each rule of source selection is applied. */
249 u_quad_t ip6s_sources_rule[16];
250 };
251
252 #ifdef _KERNEL
253 /*
254 * IPv6 onion peeling state.
255 * it will be initialized when we come into ip6_input().
256 * XXX do not make it a kitchen sink!
257 */
258 struct ip6aux {
259 u_int32_t ip6a_flags;
260 #define IP6A_SWAP 0x01 /* swapped home/care-of on packet */
261 #define IP6A_HASEEN 0x02 /* HA was present */
262 #define IP6A_BRUID 0x04 /* BR Unique Identifier was present */
263 #define IP6A_RTALERTSEEN 0x08 /* rtalert present */
264
265 /* ip6.ip6_src */
266 struct in6_addr ip6a_careof; /* care-of address of the peer */
267 struct in6_addr ip6a_home; /* home address of the peer */
268 u_int16_t ip6a_bruid; /* BR unique identifier */
269
270 /* ip6.ip6_dst */
271 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */
272
273 /* rtalert */
274 u_int16_t ip6a_rtalert; /* rtalert option value */
275
276 /*
277 * decapsulation history will be here.
278 * with IPsec it may not be accurate.
279 */
280 };
281 #endif
282
283 #ifdef _KERNEL
284 /* flags passed to ip6_output as last parameter */
285 #define IPV6_DADOUTPUT 0x01 /* DAD */
286 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
287 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
288
289 extern struct ip6stat ip6stat; /* statistics */
290 #ifndef RANDOM_IP_ID
291 extern u_int32_t ip6_id; /* fragment identifier */
292 #endif
293 extern int ip6_defhlim; /* default hop limit */
294 extern int ip6_defmcasthlim; /* default multicast hop limit */
295 extern int ip6_forwarding; /* act as router? */
296 extern int ip6_forward_srcrt; /* forward src-routed? */
297 extern int ip6_gif_hlim; /* Hop limit for gif encap packet */
298 extern int ip6_use_deprecated; /* allow deprecated addr as source */
299 extern int ip6_rr_prune; /* router renumbering prefix
300 * walk list every 5 sec. */
301 extern int ip6_v6only;
302
303 extern struct socket *ip6_mrouter; /* multicast routing daemon */
304 extern int ip6_sendredirects; /* send IP redirects when forwarding? */
305 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */
306 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */
307 extern int ip6_sourcecheck; /* Verify source interface */
308 extern int ip6_sourcecheck_interval; /* Interval between log messages */
309 extern int ip6_accept_rtadv; /* Acts as a host not a router */
310 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */
311 extern int ip6_log_interval;
312 extern time_t ip6_log_time;
313 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */
314 extern int ip6_dad_count; /* DupAddrDetectionTransmits */
315
316 #ifndef RANDOM_IP_ID
317 extern u_int32_t ip6_flow_seq;
318 #endif
319 extern int ip6_auto_flowlabel;
320 extern int ip6_auto_linklocal;
321
322 extern int ip6_anonportmin; /* minimum ephemeral port */
323 extern int ip6_anonportmax; /* maximum ephemeral port */
324 extern int ip6_lowportmin; /* minimum reserved port */
325 extern int ip6_lowportmax; /* maximum reserved port */
326
327 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */
328 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses
329 in the source address selection */
330
331 #ifdef PFIL_HOOKS
332 extern struct pfil_head inet6_pfil_hook;
333 #endif
334
335 extern struct pr_usrreqs rip6_usrreqs;
336 struct sockopt;
337
338 struct inpcb;
339
340 int icmp6_ctloutput __P((struct socket *, struct sockopt *sopt));
341
342 struct in6_ifaddr;
343 void ip6_init __P((void));
344 void ip6_input __P((struct mbuf *));
345 struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *));
346 void ip6_freepcbopts __P((struct ip6_pktopts *));
347 void ip6_freemoptions __P((struct ip6_moptions *));
348 int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int));
349 char * ip6_get_prevhdr __P((struct mbuf *, int));
350 int ip6_nexthdr __P((struct mbuf *, int, int, int *));
351 int ip6_lasthdr __P((struct mbuf *, int, int, int *));
352
353 struct ip6aux *ip6_addaux __P((struct mbuf *));
354 struct ip6aux *ip6_findaux __P((struct mbuf *));
355 void ip6_delaux __P((struct mbuf *));
356
357 int ip6_mforward __P((struct ip6_hdr *, struct ifnet *, struct mbuf *));
358 int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *,
359 u_int32_t *));
360 void ip6_savecontrol __P((struct inpcb *, struct mbuf *, struct mbuf **));
361 void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *,
362 u_int32_t *));
363 int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
364
365 void ip6_forward __P((struct mbuf *, int));
366
367 void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *));
368 int ip6_output __P((struct mbuf *, struct ip6_pktopts *,
369 struct route_in6 *,
370 int,
371 struct ip6_moptions *, struct ifnet **,
372 struct inpcb *));
373 int ip6_ctloutput __P((struct socket *, struct sockopt *));
374 int ip6_raw_ctloutput __P((struct socket *, struct sockopt *));
375 void init_ip6pktopts __P((struct ip6_pktopts *));
376 int ip6_setpktoptions __P((struct mbuf *, struct ip6_pktopts *,
377 struct ip6_pktopts *, int, int, int));
378 void ip6_clearpktopts __P((struct ip6_pktopts *, int));
379 struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int));
380 int ip6_optlen __P((struct inpcb *));
381
382 int route6_input __P((struct mbuf **, int *, int));
383
384 void frag6_init __P((void));
385 int frag6_input __P((struct mbuf **, int *, int));
386 void frag6_slowtimo __P((void));
387 void frag6_drain __P((void));
388
389 void rip6_init __P((void));
390 int rip6_input __P((struct mbuf **, int *, int));
391 void rip6_ctlinput __P((int, struct sockaddr *, void *));
392 int rip6_ctloutput __P((struct socket *, struct sockopt *));
393 int rip6_output __P((struct mbuf *, ...));
394 int rip6_usrreq __P((struct socket *,
395 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *));
396
397 int dest6_input __P((struct mbuf **, int *, int));
398 int none_input __P((struct mbuf **, int *, int));
399
400 struct in6_addr *in6_selectsrc __P((struct sockaddr_in6 *,
401 struct ip6_pktopts *, struct ip6_moptions *, struct route_in6 *,
402 struct in6_addr *, int *));
403 int in6_selectroute __P((struct sockaddr_in6 *, struct ip6_pktopts *,
404 struct ip6_moptions *, struct route_in6 *, struct ifnet **,
405 struct rtentry **, int));
406 #ifdef RANDOM_IP_ID
407 u_int32_t ip6_randomid __P((void));
408 u_int32_t ip6_randomflowlabel __P((void));
409 #endif
410 #endif /* _KERNEL */
411
412 #endif /* !_NETINET6_IP6_VAR_H_ */
Cache object: d68c3693ba30692d8885e6229b290fd7
|