1 /*-
2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $
30 */
31
32 /*-
33 * Copyright (c) 1982, 1986, 1993
34 * The Regents of the University of California. All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 4. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
47 *
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 *
60 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93
61 * $FreeBSD$
62 */
63
64 #ifndef _NETINET6_IP6_VAR_H_
65 #define _NETINET6_IP6_VAR_H_
66
67 /*
68 * IP6 reassembly queue structure. Each fragment
69 * being reassembled is attached to one of these structures.
70 */
71 struct ip6q {
72 struct ip6asfrag *ip6q_down;
73 struct ip6asfrag *ip6q_up;
74 u_int32_t ip6q_ident;
75 u_int8_t ip6q_nxt;
76 u_int8_t ip6q_ecn;
77 u_int8_t ip6q_ttl;
78 struct in6_addr ip6q_src, ip6q_dst;
79 struct ip6q *ip6q_next;
80 struct ip6q *ip6q_prev;
81 int ip6q_unfrglen; /* len of unfragmentable part */
82 #ifdef notyet
83 u_char *ip6q_nxtp;
84 #endif
85 int ip6q_nfrag; /* # of fragments */
86 };
87
88 struct ip6asfrag {
89 struct ip6asfrag *ip6af_down;
90 struct ip6asfrag *ip6af_up;
91 struct mbuf *ip6af_m;
92 int ip6af_offset; /* offset in ip6af_m to next header */
93 int ip6af_frglen; /* fragmentable part length */
94 int ip6af_off; /* fragment offset */
95 u_int16_t ip6af_mff; /* more fragment bit in frag off */
96 };
97
98 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
99
100 struct ip6_moptions {
101 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
102 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */
103 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */
104 LIST_HEAD(, in6_multi_mship) im6o_memberships;
105 };
106
107 /*
108 * Control options for outgoing packets
109 */
110
111 /* Routing header related info */
112 struct ip6po_rhinfo {
113 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
114 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */
115 };
116 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr
117 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route
118
119 /* Nexthop related info */
120 struct ip6po_nhinfo {
121 struct sockaddr *ip6po_nhi_nexthop;
122 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */
123 };
124 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop
125 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route
126
127 struct ip6_pktopts {
128 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */
129 int ip6po_hlim; /* Hoplimit for outgoing packets */
130
131 /* Outgoing IF/address information */
132 struct in6_pktinfo *ip6po_pktinfo;
133
134 /* Next-hop address information */
135 struct ip6po_nhinfo ip6po_nhinfo;
136
137 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
138
139 /* Destination options header (before a routing header) */
140 struct ip6_dest *ip6po_dest1;
141
142 /* Routing header related info. */
143 struct ip6po_rhinfo ip6po_rhinfo;
144
145 /* Destination options header (after a routing header) */
146 struct ip6_dest *ip6po_dest2;
147
148 int ip6po_tclass; /* traffic class */
149
150 int ip6po_minmtu; /* fragment vs PMTU discovery policy */
151 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/
152 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */
153 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */
154
155 int ip6po_prefer_tempaddr; /* whether temporary addresses are
156 preferred as source address */
157 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */
158 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */
159 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */
160
161 int ip6po_flags;
162 #if 0 /* parameters in this block is obsolete. do not reuse the values. */
163 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */
164 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */
165 #endif
166 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */
167 #define IP6PO_USECOA 0x08 /* use care of address */
168 };
169
170 /*
171 * Control options for incoming packets
172 */
173
174 struct ip6stat {
175 u_quad_t ip6s_total; /* total packets received */
176 u_quad_t ip6s_tooshort; /* packet too short */
177 u_quad_t ip6s_toosmall; /* not enough data */
178 u_quad_t ip6s_fragments; /* fragments received */
179 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
180 u_quad_t ip6s_fragtimeout; /* fragments timed out */
181 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */
182 u_quad_t ip6s_forward; /* packets forwarded */
183 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */
184 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */
185 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/
186 u_quad_t ip6s_localout; /* total ip packets generated here */
187 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */
188 u_quad_t ip6s_reassembled; /* total packets reassembled ok */
189 u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */
190 u_quad_t ip6s_ofragments; /* output fragments created */
191 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
192 u_quad_t ip6s_badoptions; /* error in option processing */
193 u_quad_t ip6s_noroute; /* packets discarded due to no route */
194 u_quad_t ip6s_badvers; /* ip6 version != 6 */
195 u_quad_t ip6s_rawout; /* total raw ip packets generated */
196 u_quad_t ip6s_badscope; /* scope error */
197 u_quad_t ip6s_notmember; /* don't join this multicast group */
198 u_quad_t ip6s_nxthist[256]; /* next header history */
199 u_quad_t ip6s_m1; /* one mbuf */
200 u_quad_t ip6s_m2m[32]; /* two or more mbuf */
201 u_quad_t ip6s_mext1; /* one ext mbuf */
202 u_quad_t ip6s_mext2m; /* two or more ext mbuf */
203 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */
204 u_quad_t ip6s_nogif; /* no match gif found */
205 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */
206
207 /*
208 * statistics for improvement of the source address selection
209 * algorithm:
210 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
211 */
212 /* number of times that address selection fails */
213 u_quad_t ip6s_sources_none;
214 /* number of times that an address on the outgoing I/F is chosen */
215 u_quad_t ip6s_sources_sameif[16];
216 /* number of times that an address on a non-outgoing I/F is chosen */
217 u_quad_t ip6s_sources_otherif[16];
218 /*
219 * number of times that an address that has the same scope
220 * from the destination is chosen.
221 */
222 u_quad_t ip6s_sources_samescope[16];
223 /*
224 * number of times that an address that has a different scope
225 * from the destination is chosen.
226 */
227 u_quad_t ip6s_sources_otherscope[16];
228 /* number of times that a deprecated address is chosen */
229 u_quad_t ip6s_sources_deprecated[16];
230
231 u_quad_t ip6s_forward_cachehit;
232 u_quad_t ip6s_forward_cachemiss;
233
234 /* number of times that each rule of source selection is applied. */
235 u_quad_t ip6s_sources_rule[16];
236 };
237
238 #ifdef _KERNEL
239 /*
240 * IPv6 onion peeling state.
241 * it will be initialized when we come into ip6_input().
242 * XXX do not make it a kitchen sink!
243 */
244 struct ip6aux {
245 u_int32_t ip6a_flags;
246 #define IP6A_SWAP 0x01 /* swapped home/care-of on packet */
247 #define IP6A_HASEEN 0x02 /* HA was present */
248 #define IP6A_BRUID 0x04 /* BR Unique Identifier was present */
249 #define IP6A_RTALERTSEEN 0x08 /* rtalert present */
250
251 /* ip6.ip6_src */
252 struct in6_addr ip6a_careof; /* care-of address of the peer */
253 struct in6_addr ip6a_home; /* home address of the peer */
254 u_int16_t ip6a_bruid; /* BR unique identifier */
255
256 /* ip6.ip6_dst */
257 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */
258
259 /* rtalert */
260 u_int16_t ip6a_rtalert; /* rtalert option value */
261
262 /*
263 * decapsulation history will be here.
264 * with IPsec it may not be accurate.
265 */
266 };
267 #endif
268
269 #ifdef _KERNEL
270 /* flags passed to ip6_output as last parameter */
271 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */
272 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
273 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
274
275 #ifdef __NO_STRICT_ALIGNMENT
276 #define IP6_HDR_ALIGNED_P(ip) 1
277 #else
278 #define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0)
279 #endif
280
281 extern struct ip6stat ip6stat; /* statistics */
282 extern int ip6_defhlim; /* default hop limit */
283 extern int ip6_defmcasthlim; /* default multicast hop limit */
284 extern int ip6_forwarding; /* act as router? */
285 extern int ip6_forward_srcrt; /* forward src-routed? */
286 extern int ip6_gif_hlim; /* Hop limit for gif encap packet */
287 extern int ip6_use_deprecated; /* allow deprecated addr as source */
288 extern int ip6_rr_prune; /* router renumbering prefix
289 * walk list every 5 sec. */
290 extern int ip6_mcast_pmtu; /* enable pMTU discovery for multicast? */
291 extern int ip6_v6only;
292
293 extern struct socket *ip6_mrouter; /* multicast routing daemon */
294 extern int ip6_sendredirects; /* send IP redirects when forwarding? */
295 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */
296 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */
297 extern int ip6_sourcecheck; /* Verify source interface */
298 extern int ip6_sourcecheck_interval; /* Interval between log messages */
299 extern int ip6_accept_rtadv; /* Acts as a host not a router */
300 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */
301 extern int ip6_log_interval;
302 extern time_t ip6_log_time;
303 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */
304 extern int ip6_dad_count; /* DupAddrDetectionTransmits */
305
306 extern int ip6_auto_flowlabel;
307 extern int ip6_auto_linklocal;
308
309 extern int ip6_anonportmin; /* minimum ephemeral port */
310 extern int ip6_anonportmax; /* maximum ephemeral port */
311 extern int ip6_lowportmin; /* minimum reserved port */
312 extern int ip6_lowportmax; /* maximum reserved port */
313
314 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */
315 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses
316 in the source address selection */
317
318 extern int ip6_use_defzone; /* whether to use the default scope zone
319 when unspecified */
320
321 extern struct pfil_head inet6_pfil_hook; /* packet filter hooks */
322 #ifdef IPSTEALTH
323 extern int ip6stealth;
324 #endif
325
326 extern struct pr_usrreqs rip6_usrreqs;
327 struct sockopt;
328
329 struct inpcb;
330
331 int icmp6_ctloutput __P((struct socket *, struct sockopt *sopt));
332
333 struct in6_ifaddr;
334 void ip6_init __P((void));
335 void ip6_input __P((struct mbuf *));
336 struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *));
337 void ip6_freepcbopts __P((struct ip6_pktopts *));
338 void ip6_freemoptions __P((struct ip6_moptions *));
339 int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int));
340 char * ip6_get_prevhdr __P((struct mbuf *, int));
341 int ip6_nexthdr __P((struct mbuf *, int, int, int *));
342 int ip6_lasthdr __P((struct mbuf *, int, int, int *));
343
344 struct ip6aux *ip6_addaux __P((struct mbuf *));
345 struct ip6aux *ip6_findaux __P((struct mbuf *));
346 void ip6_delaux __P((struct mbuf *));
347
348 extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *,
349 struct mbuf *);
350
351 int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *,
352 u_int32_t *));
353 struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *,
354 struct mbuf **, int *);
355 void ip6_savecontrol __P((struct inpcb *, struct mbuf *, struct mbuf **));
356 void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *,
357 u_int32_t *));
358 int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
359
360 void ip6_forward __P((struct mbuf *, int));
361
362 void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *));
363 int ip6_output __P((struct mbuf *, struct ip6_pktopts *,
364 struct route_in6 *,
365 int,
366 struct ip6_moptions *, struct ifnet **,
367 struct inpcb *));
368 int ip6_ctloutput __P((struct socket *, struct sockopt *));
369 int ip6_raw_ctloutput __P((struct socket *, struct sockopt *));
370 void ip6_initpktopts __P((struct ip6_pktopts *));
371 int ip6_setpktopts __P((struct mbuf *, struct ip6_pktopts *,
372 struct ip6_pktopts *, struct ucred *, int));
373 void ip6_clearpktopts __P((struct ip6_pktopts *, int));
374 struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int));
375 int ip6_optlen __P((struct inpcb *));
376
377 int route6_input __P((struct mbuf **, int *, int));
378
379 void frag6_init __P((void));
380 int frag6_input __P((struct mbuf **, int *, int));
381 void frag6_slowtimo __P((void));
382 void frag6_drain __P((void));
383
384 void rip6_init __P((void));
385 int rip6_input __P((struct mbuf **, int *, int));
386 void rip6_ctlinput __P((int, struct sockaddr *, void *));
387 int rip6_ctloutput __P((struct socket *, struct sockopt *));
388 int rip6_output __P((struct mbuf *, ...));
389 int rip6_usrreq __P((struct socket *,
390 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *));
391
392 int dest6_input __P((struct mbuf **, int *, int));
393 int none_input __P((struct mbuf **, int *, int));
394
395 struct in6_addr *in6_selectsrc __P((struct sockaddr_in6 *, struct ip6_pktopts *,
396 struct inpcb *inp, struct route_in6 *, struct ucred *cred,
397 struct ifnet **, int *));
398 int in6_selectroute __P((struct sockaddr_in6 *, struct ip6_pktopts *,
399 struct ip6_moptions *, struct route_in6 *, struct ifnet **,
400 struct rtentry **, int));
401 u_int32_t ip6_randomid __P((void));
402 u_int32_t ip6_randomflowlabel __P((void));
403 #endif /* _KERNEL */
404
405 #endif /* !_NETINET6_IP6_VAR_H_ */
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