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[netbsd-mini2440.git] / sys / netinet6 / ip6_var.h
blobdd46c7da69808f7746e32e41fdc66d7b1d65d33e
1 /* $NetBSD: ip6_var.h,v 1.52 2009/03/23 18:43:20 liamjfoy Exp $ */
2 /* $KAME: ip6_var.h,v 1.33 2000/06/11 14:59:20 jinmei 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 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93
62 */
63
64 #ifndef _NETINET6_IP6_VAR_H_
65 #define _NETINET6_IP6_VAR_H_
66
67 #include <sys/socketvar.h>
68 #include <net/route.h>
69
70 /*
71 * IP6 reassembly queue structure. Each fragment
72 * being reassembled is attached to one of these structures.
73 */
74 struct ip6q {
75 u_int32_t ip6q_head;
76 u_int16_t ip6q_len;
77 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */
78 u_int8_t ip6q_hlim;
79 struct ip6asfrag *ip6q_down;
80 struct ip6asfrag *ip6q_up;
81 u_int32_t ip6q_ident;
82 u_int8_t ip6q_arrive;
83 u_int8_t ip6q_ttl;
84 struct in6_addr ip6q_src, ip6q_dst;
85 struct ip6q *ip6q_next;
86 struct ip6q *ip6q_prev;
87 int ip6q_unfrglen; /* len of unfragmentable part */
88 #ifdef notyet
89 u_char *ip6q_nxtp;
90 #endif
91 int ip6q_nfrag; /* # of fragments */
92 };
93
94 struct ip6asfrag {
95 u_int32_t ip6af_head;
96 u_int16_t ip6af_len;
97 u_int8_t ip6af_nxt;
98 u_int8_t ip6af_hlim;
99 /* must not override the above members during reassembling */
100 struct ip6asfrag *ip6af_down;
101 struct ip6asfrag *ip6af_up;
102 struct mbuf *ip6af_m;
103 int ip6af_offset; /* offset in ip6af_m to next header */
104 int ip6af_frglen; /* fragmentable part length */
105 int ip6af_off; /* fragment offset */
106 u_int16_t ip6af_mff; /* more fragment bit in frag off */
107 };
108
109 #define IP6_REASS_MBUF(ip6af) ((ip6af)->ip6af_m)
110
111 struct ip6_moptions {
112 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
113 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */
114 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */
115 LIST_HEAD(, in6_multi_mship) im6o_memberships;
116 };
117
118 /*
119 * Control options for outgoing packets
120 */
121
122 /* Routing header related info */
123 struct ip6po_rhinfo {
124 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
125 struct route ip6po_rhi_route; /* Route to the 1st hop */
126 };
127 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr
128 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route
129
130 /* Nexthop related info */
131 struct ip6po_nhinfo {
132 struct sockaddr *ip6po_nhi_nexthop;
133 struct route ip6po_nhi_route; /* Route to the nexthop */
134 };
135 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop
136 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route
137
138 struct ip6_pktopts {
139 int ip6po_hlim; /* Hoplimit for outgoing packets */
140 struct in6_pktinfo *ip6po_pktinfo; /* Outgoing IF/address information */
141 struct ip6po_nhinfo ip6po_nhinfo; /* Next-hop address information */
142 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
143 struct ip6_dest *ip6po_dest1; /* Destination options header(1st part) */
144 struct ip6po_rhinfo ip6po_rhinfo; /* Routing header related info. */
145 struct ip6_dest *ip6po_dest2; /* Destination options header(2nd part) */
146 int ip6po_tclass; /* traffic class */
147 int ip6po_minmtu; /* fragment vs PMTU discovery policy */
148 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/
149 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */
150 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */
151 int ip6po_flags;
152 #if 0 /* parameters in this block is obsolete. do not reuse the values. */
153 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */
154 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */
155 #endif
156 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */
157 };
158
159 /*
160 * IPv6 statistics.
161 * Each counter is an unsigned 64-bit value.
162 */
163 #define IP6_STAT_TOTAL 0 /* total packets received */
164 #define IP6_STAT_TOOSHORT 1 /* packet too short */
165 #define IP6_STAT_TOOSMALL 2 /* not enough data */
166 #define IP6_STAT_FRAGMENTS 3 /* fragments received */
167 #define IP6_STAT_FRAGDROPPED 4 /* frags dropped (dups, out of space) */
168 #define IP6_STAT_FRAGTIMEOUT 5 /* fragments timed out */
169 #define IP6_STAT_FRAGOVERFLOW 6 /* fragments that exceed limit */
170 #define IP6_STAT_FORWARD 7 /* packets forwarded */
171 #define IP6_STAT_CANTFORWARD 8 /* packets rcvd for uncreachable dst */
172 #define IP6_STAT_REDIRECTSENT 9 /* packets forwarded on same net */
173 #define IP6_STAT_DELIVERED 10 /* datagrams delivered to upper level */
174 #define IP6_STAT_LOCALOUT 11 /* total IP packets generated here */
175 #define IP6_STAT_ODROPPED 12 /* lost packets due to nobufs, etc. */
176 #define IP6_STAT_REASSEMBLED 13 /* total packets reassembled ok */
177 #define IP6_STAT_FRAGMENTED 14 /* datagrams successfully fragmented */
178 #define IP6_STAT_OFRAGMENTS 15 /* output fragments created */
179 #define IP6_STAT_CANTFRAG 16 /* don't fragment flag was set, etc. */
180 #define IP6_STAT_BADOPTIONS 17 /* error in option processing */
181 #define IP6_STAT_NOROUTE 18 /* packets discarded due to no route */
182 #define IP6_STAT_BADVERS 19 /* ip6 version != 6 */
183 #define IP6_STAT_RAWOUT 20 /* total raw ip packets generated */
184 #define IP6_STAT_BADSCOPE 21 /* scope error */
185 #define IP6_STAT_NOTMEMBER 22 /* don't join this multicast group */
186 #define IP6_STAT_NXTHIST 23 /* next header histogram */
187 /* space for 256 counters */
188 #define IP6_STAT_M1 279 /* one mbuf */
189 #define IP6_STAT_M2M 280 /* two or more mbuf */
190 /* space for 32 counters */
191 #define IP6_STAT_MEXT1 312 /* one ext mbuf */
192 #define IP6_STAT_MEXT2M 313 /* two or more ext mbuf */
193 #define IP6_STAT_EXTHDRTOOLONG 314 /* ext hdr are not contiguous */
194 #define IP6_STAT_NOGIF 315 /* no match gif found */
195 #define IP6_STAT_TOOMANYHDR 316 /* discarded due to too many headers */
196 /*
197 * statistics for improvement of the source address selection
198 * algorithm:
199 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
200 */
201 #define IP6_STAT_SOURCES_NONE 317 /* number of times that address
202 selection fails */
203 #define IP6_STAT_SOURCES_SAMEIF 318 /* number of times that an address
204 on the outgoing I/F is chosen */
205 /* space for 16 counters */
206 #define IP6_STAT_SOURCES_OTHERIF 334 /* number of times that an address on
207 a non-outgoing I/F is chosen */
208 /* space for 16 counters */
209 #define IP6_STAT_SOURCES_SAMESCOPE 350 /* number of times that an address that
210 has the same scope from the dest.
211 is chosen */
212 /* space for 16 counters */
213 #define IP6_STAT_SOURCES_OTHERSCOPE 366 /* number of times that an address that
214 has a different scope from the dest.
215 is chosen */
216 /* space for 16 counters */
217 #define IP6_STAT_SOURCES_DEPRECATED 382 /* number of times that a deprecated
218 address is chosen */
219 /* space for 16 counters */
220 #define IP6_STAT_FORWARD_CACHEHIT 398
221 #define IP6_STAT_FORWARD_CACHEMISS 399
222 #define IP6_STAT_FASTFORWARD 400 /* packets fast forwarded */
223 #define IP6_STAT_FASTFORWARDFLOWS 401 /* number of fast forward flows */
224
225 #define IP6_NSTATS 402
226
227 #define IP6FLOW_HASHBITS 6 /* should not be a multiple of 8 */
228
229 /*
230 * Structure for an IPv6 flow (ip6_fastforward).
231 */
232 struct ip6flow {
233 LIST_ENTRY(ip6flow) ip6f_list; /* next in active list */
234 LIST_ENTRY(ip6flow) ip6f_hash; /* next ip6flow in bucket */
235 struct in6_addr ip6f_dst; /* destination address */
236 struct in6_addr ip6f_src; /* source address */
237 struct route ip6f_ro; /* associated route entry */
238 u_int32_t ip6f_flow; /* flow (tos) */
239 u_quad_t ip6f_uses; /* number of uses in this period */
240 u_quad_t ip6f_last_uses; /* number of uses in last period */
241 u_quad_t ip6f_dropped; /* ENOBUFS returned by if_output */
242 u_quad_t ip6f_forwarded; /* packets forwarded */
243 u_int ip6f_timer; /* lifetime timer */
244 time_t ip6f_start; /* creation time */
245 };
246
247 #ifdef _KERNEL
248 /*
249 * Auxiliary attributes of incoming IPv6 packets, which is initialized when we
250 * come into ip6_input().
251 * XXX do not make it a kitchen sink!
252 */
253 struct ip6aux {
254 /* ip6.ip6_dst */
255 struct in6_addr ip6a_src;
256 uint32_t ip6a_scope_id;
257 int ip6a_flags;
258 };
259
260 /* flags passed to ip6_output as last parameter */
261 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */
262 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
263 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
264
265 extern u_int32_t ip6_id; /* fragment identifier */
266 extern int ip6_defhlim; /* default hop limit */
267 extern int ip6_defmcasthlim; /* default multicast hop limit */
268 extern int ip6_forwarding; /* act as router? */
269 extern int ip6_sendredirect; /* send ICMPv6 redirect? */
270 extern int ip6_forward_srcrt; /* forward src-routed? */
271 extern int ip6_use_deprecated; /* allow deprecated addr as source */
272 extern int ip6_rr_prune; /* router renumbering prefix
273 * walk list every 5 sec. */
274 extern int ip6_mcast_pmtu; /* enable pMTU discovery for multicast? */
275 extern int ip6_v6only;
276
277 extern struct socket *ip6_mrouter; /* multicast routing daemon */
278 extern int ip6_sendredirects; /* send IP redirects when forwarding? */
279 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */
280 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */
281 extern int ip6_sourcecheck; /* Verify source interface */
282 extern int ip6_sourcecheck_interval; /* Interval between log messages */
283 extern int ip6_accept_rtadv; /* Acts as a host not a router */
284 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */
285 extern int ip6_log_interval;
286 extern time_t ip6_log_time;
287 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */
288 extern int ip6_dad_count; /* DupAddrDetectionTransmits */
289
290 extern int ip6_auto_flowlabel;
291 extern int ip6_auto_linklocal;
292
293 extern int ip6_anonportmin; /* minimum ephemeral port */
294 extern int ip6_anonportmax; /* maximum ephemeral port */
295 extern int ip6_lowportmin; /* minimum reserved port */
296 extern int ip6_lowportmax; /* maximum reserved port */
297
298 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */
299 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses
300 in the source address selection */
301 extern int ip6_use_defzone; /* whether to use the default scope zone
302 when unspecified */
303
304 #ifdef GATEWAY
305 extern int ip6_maxflows; /* maximum amount of flows for ip6ff */
306 extern int ip6_hashsize; /* size of hash table */
307 #endif
308
309 struct in6pcb;
310
311 int icmp6_ctloutput(int, struct socket *, struct sockopt *);
312
313 void ip6_init(void);
314 void ip6intr(void);
315 void ip6_input(struct mbuf *);
316 const struct ip6aux *ip6_getdstifaddr(struct mbuf *);
317 void ip6_freepcbopts(struct ip6_pktopts *);
318 void ip6_freemoptions(struct ip6_moptions *);
319 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int);
320 u_int8_t *ip6_get_prevhdr(struct mbuf *, int);
321 int ip6_nexthdr(struct mbuf *, int, int, int *);
322 int ip6_lasthdr(struct mbuf *, int, int, int *);
323
324 struct m_tag *ip6_addaux(struct mbuf *);
325 struct m_tag *ip6_findaux(struct mbuf *);
326 void ip6_delaux(struct mbuf *);
327
328 int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *);
329 int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
330 u_int32_t *);
331 void ip6_savecontrol(struct in6pcb *, struct mbuf **, struct ip6_hdr *,
332 struct mbuf *);
333 void ip6_notify_pmtu(struct in6pcb *, const struct sockaddr_in6 *,
334 u_int32_t *);
335 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
336
337 void ip6_forward(struct mbuf *, int);
338
339 void ip6_mloopback(struct ifnet *, struct mbuf *,
340 const struct sockaddr_in6 *);
341 int ip6_output(struct mbuf *, struct ip6_pktopts *,
342 struct route *, int,
343 struct ip6_moptions *, struct socket *,
344 struct ifnet **);
345 int ip6_ctloutput(int, struct socket *, struct sockopt *);
346 int ip6_raw_ctloutput(int, struct socket *, struct sockopt *);
347 void ip6_initpktopts(struct ip6_pktopts *);
348 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *,
349 struct ip6_pktopts *, kauth_cred_t, int);
350 void ip6_clearpktopts(struct ip6_pktopts *, int);
351 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int);
352 int ip6_optlen(struct in6pcb *);
353
354 void ip6_statinc(u_int);
355
356 int route6_input(struct mbuf **, int *, int);
357
358 void frag6_init(void);
359 int frag6_input(struct mbuf **, int *, int);
360 void frag6_slowtimo(void);
361 void frag6_drain(void);
362
363 int ip6flow_init(int);
364 void ip6flow_poolinit(void);
365 struct ip6flow *ip6flow_reap(int);
366 void ip6flow_create(const struct route *, struct mbuf *);
367 void ip6flow_slowtimo(void);
368 int ip6flow_invalidate_all(int);
369
370 void rip6_init(void);
371 int rip6_input(struct mbuf **, int *, int);
372 void *rip6_ctlinput(int, const struct sockaddr *, void *);
373 int rip6_ctloutput(int, struct socket *, struct sockopt *);
374 int rip6_output(struct mbuf *, struct socket *, struct sockaddr_in6 *,
375 struct mbuf *);
376 int rip6_usrreq(struct socket *,
377 int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *);
378
379 int dest6_input(struct mbuf **, int *, int);
380 int none_input(struct mbuf **, int *, int);
381
382 struct route;
383
384 struct in6_addr *in6_selectsrc(struct sockaddr_in6 *,
385 struct ip6_pktopts *, struct ip6_moptions *, struct route *,
386 struct in6_addr *, struct ifnet **, int *);
387 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *,
388 struct ip6_moptions *, struct route *, struct ifnet **,
389 struct rtentry **, int);
390
391 u_int32_t ip6_randomid(void);
392 u_int32_t ip6_randomflowlabel(void);
393 #endif /* _KERNEL */
394
395 #endif /* !_NETINET6_IP6_VAR_H_ */
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