ip6_var.h revision 1.74.6.3 1 /* $NetBSD: ip6_var.h,v 1.74.6.3 2018/09/27 15:57:07 martin 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 int ip6q_ipsec; /* IPsec flags */
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) ((ip6af)->ip6af_m)
111
112 struct ip6_moptions {
113 if_index_t im6o_multicast_if_index; /* I/F 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 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 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 int ip6po_hlim; /* Hoplimit for outgoing packets */
141 struct in6_pktinfo *ip6po_pktinfo; /* Outgoing IF/address information */
142 struct ip6po_nhinfo ip6po_nhinfo; /* Next-hop address information */
143 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
144 struct ip6_dest *ip6po_dest1; /* Destination options header(1st part) */
145 struct ip6po_rhinfo ip6po_rhinfo; /* Routing header related info. */
146 struct ip6_dest *ip6po_dest2; /* Destination options header(2nd part) */
147 int ip6po_tclass; /* traffic class */
148 int ip6po_minmtu; /* fragment vs PMTU discovery policy */
149 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/
150 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */
151 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */
152 int ip6po_prefer_tempaddr; /* whether temporary addresses are
153 * preferred as source address */
154 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */
155 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */
156 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */
157 int ip6po_flags;
158 #if 0 /* parameters in this block is obsolete. do not reuse the values. */
159 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */
160 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */
161 #endif
162 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */
163 };
164
165 /*
166 * IPv6 statistics.
167 * Each counter is an unsigned 64-bit value.
168 */
169 #define IP6_STAT_TOTAL 0 /* total packets received */
170 #define IP6_STAT_TOOSHORT 1 /* packet too short */
171 #define IP6_STAT_TOOSMALL 2 /* not enough data */
172 #define IP6_STAT_FRAGMENTS 3 /* fragments received */
173 #define IP6_STAT_FRAGDROPPED 4 /* frags dropped (dups, out of space) */
174 #define IP6_STAT_FRAGTIMEOUT 5 /* fragments timed out */
175 #define IP6_STAT_FRAGOVERFLOW 6 /* fragments that exceed limit */
176 #define IP6_STAT_FORWARD 7 /* packets forwarded */
177 #define IP6_STAT_CANTFORWARD 8 /* packets rcvd for uncreachable dst */
178 #define IP6_STAT_REDIRECTSENT 9 /* packets forwarded on same net */
179 #define IP6_STAT_DELIVERED 10 /* datagrams delivered to upper level */
180 #define IP6_STAT_LOCALOUT 11 /* total IP packets generated here */
181 #define IP6_STAT_ODROPPED 12 /* lost packets due to nobufs, etc. */
182 #define IP6_STAT_REASSEMBLED 13 /* total packets reassembled ok */
183 #define IP6_STAT_FRAGMENTED 14 /* datagrams successfully fragmented */
184 #define IP6_STAT_OFRAGMENTS 15 /* output fragments created */
185 #define IP6_STAT_CANTFRAG 16 /* don't fragment flag was set, etc. */
186 #define IP6_STAT_BADOPTIONS 17 /* error in option processing */
187 #define IP6_STAT_NOROUTE 18 /* packets discarded due to no route */
188 #define IP6_STAT_BADVERS 19 /* ip6 version != 6 */
189 #define IP6_STAT_RAWOUT 20 /* total raw ip packets generated */
190 #define IP6_STAT_BADSCOPE 21 /* scope error */
191 #define IP6_STAT_NOTMEMBER 22 /* don't join this multicast group */
192 #define IP6_STAT_NXTHIST 23 /* next header histogram */
193 /* space for 256 counters */
194 #define IP6_STAT_M1 279 /* one mbuf */
195 #define IP6_STAT_M2M 280 /* two or more mbuf */
196 /* space for 32 counters */
197 #define IP6_STAT_MEXT1 312 /* one ext mbuf */
198 #define IP6_STAT_MEXT2M 313 /* two or more ext mbuf */
199 #define IP6_STAT_EXTHDRTOOLONG 314 /* ext hdr are not contiguous */
200 #define IP6_STAT_NOGIF 315 /* no match gif found */
201 #define IP6_STAT_TOOMANYHDR 316 /* discarded due to too many headers */
202 /*
203 * statistics for improvement of the source address selection
204 * algorithm:
205 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
206 */
207 #define IP6_STAT_SOURCES_NONE 317 /* number of times that address
208 selection fails */
209 #define IP6_STAT_SOURCES_SAMEIF 318 /* number of times that an address
210 on the outgoing I/F is chosen */
211 /* space for 16 counters */
212 #define IP6_STAT_SOURCES_OTHERIF 334 /* number of times that an address on
213 a non-outgoing I/F is chosen */
214 /* space for 16 counters */
215 #define IP6_STAT_SOURCES_SAMESCOPE 350 /* number of times that an address that
216 has the same scope from the dest.
217 is chosen */
218 /* space for 16 counters */
219 #define IP6_STAT_SOURCES_OTHERSCOPE 366 /* number of times that an address that
220 has a different scope from the dest.
221 is chosen */
222 /* space for 16 counters */
223 #define IP6_STAT_SOURCES_DEPRECATED 382 /* number of times that a deprecated
224 address is chosen */
225 /* space for 16 counters */
226 #define IP6_STAT_FORWARD_CACHEHIT 398
227 #define IP6_STAT_FORWARD_CACHEMISS 399
228 #define IP6_STAT_FASTFORWARD 400 /* packets fast forwarded */
229 #define IP6_STAT_FASTFORWARDFLOWS 401 /* number of fast forward flows */
230 #define IP6_STAT_NOIPSEC 402 /* no match ipsec(4) found */
231
232 #define IP6_NSTATS 403
233
234 #define IP6FLOW_HASHBITS 6 /* should not be a multiple of 8 */
235
236 /*
237 * Structure for an IPv6 flow (ip6_fastforward).
238 */
239 struct ip6flow {
240 TAILQ_ENTRY(ip6flow) ip6f_list; /* next in active list */
241 TAILQ_ENTRY(ip6flow) ip6f_hash; /* next ip6flow in bucket */
242 size_t ip6f_hashidx; /* own hash index of ipflowtable[] */
243 struct in6_addr ip6f_dst; /* destination address */
244 struct in6_addr ip6f_src; /* source address */
245 struct route ip6f_ro; /* associated route entry */
246 u_int32_t ip6f_flow; /* flow (tos) */
247 u_quad_t ip6f_uses; /* number of uses in this period */
248 u_quad_t ip6f_last_uses; /* number of uses in last period */
249 u_quad_t ip6f_dropped; /* ENOBUFS returned by if_output */
250 u_quad_t ip6f_forwarded; /* packets forwarded */
251 u_int ip6f_timer; /* lifetime timer */
252 };
253
254 #ifdef _KERNEL
255 /*
256 * Auxiliary attributes of incoming IPv6 packets, which is initialized when we
257 * come into ip6_input().
258 * XXX do not make it a kitchen sink!
259 */
260 struct ip6aux {
261 /* ip6.ip6_dst */
262 struct in6_addr ip6a_src;
263 uint32_t ip6a_scope_id;
264 int ip6a_flags;
265 };
266
267 /* flags passed to ip6_output as last parameter */
268 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */
269 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
270 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
271
272 extern u_int32_t ip6_id; /* fragment identifier */
273 extern int ip6_defhlim; /* default hop limit */
274 extern int ip6_defmcasthlim; /* default multicast hop limit */
275 extern int ip6_forwarding; /* act as router? */
276 extern int ip6_sendredirect; /* send ICMPv6 redirect? */
277 extern int ip6_forward_srcrt; /* forward src-routed? */
278 extern int ip6_use_deprecated; /* allow deprecated addr as source */
279 extern int ip6_rr_prune; /* router renumbering prefix
280 * walk list every 5 sec. */
281 extern int ip6_mcast_pmtu; /* enable pMTU discovery for multicast? */
282 extern int ip6_v6only;
283 extern int ip6_neighborgcthresh; /* Threshold # of NDP entries for GC */
284 extern int ip6_maxifprefixes; /* Max acceptable prefixes via RA per IF */
285 extern int ip6_maxifdefrouters; /* Max acceptable def routers via RA */
286 extern int ip6_maxdynroutes; /* Max # of routes created via redirect */
287
288
289 extern struct socket *ip6_mrouter; /* multicast routing daemon */
290 extern int ip6_sendredirects; /* send IP redirects when forwarding? */
291 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */
292 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */
293 extern int ip6_sourcecheck; /* Verify source interface */
294 extern int ip6_sourcecheck_interval; /* Interval between log messages */
295 extern int ip6_accept_rtadv; /* Acts as a host not a router */
296 extern int ip6_rtadv_maxroutes; /* maximum number of routes via rtadv */
297 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */
298 extern int ip6_log_interval;
299 extern time_t ip6_log_time;
300 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */
301 extern int ip6_dad_count; /* DupAddrDetectionTransmits */
302
303 extern int ip6_auto_flowlabel;
304 extern int ip6_auto_linklocal;
305
306 extern int ip6_anonportmin; /* minimum ephemeral port */
307 extern int ip6_anonportmax; /* maximum ephemeral port */
308 extern int ip6_lowportmin; /* minimum reserved port */
309 extern int ip6_lowportmax; /* maximum reserved port */
310
311 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */
312 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses
313 in the source address selection */
314 extern int ip6_use_defzone; /* whether to use the default scope zone
315 when unspecified */
316
317 #ifdef GATEWAY
318 extern int ip6_maxflows; /* maximum amount of flows for ip6ff */
319 extern int ip6_hashsize; /* size of hash table */
320 #endif
321
322 struct in6pcb;
323 extern const struct pr_usrreqs rip6_usrreqs;
324
325 int icmp6_ctloutput(int, struct socket *, struct sockopt *);
326
327 struct mbuf;
328 void ip6_init(void);
329 void ip6_input(struct mbuf *, struct ifnet *);
330 const struct ip6aux *ip6_getdstifaddr(struct mbuf *);
331 void ip6_freepcbopts(struct ip6_pktopts *);
332 void ip6_freemoptions(struct ip6_moptions *);
333 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int);
334 int ip6_get_prevhdr(struct mbuf *, int);
335 int ip6_nexthdr(struct mbuf *, int, int, int *);
336 int ip6_lasthdr(struct mbuf *, int, int, int *);
337
338 struct m_tag *ip6_addaux(struct mbuf *);
339 struct m_tag *ip6_findaux(struct mbuf *);
340 void ip6_delaux(struct mbuf *);
341 struct ip6_hdr;
342 int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *);
343 int ip6_hopopts_input(u_int32_t *, u_int32_t *, struct mbuf **, int *);
344 void ip6_savecontrol(struct in6pcb *, struct mbuf **, struct ip6_hdr *,
345 struct mbuf *);
346 void ip6_notify_pmtu(struct in6pcb *, const struct sockaddr_in6 *,
347 u_int32_t *);
348 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
349
350 void ip6_forward(struct mbuf *, int);
351
352 void ip6_mloopback(struct ifnet *, struct mbuf *,
353 const struct sockaddr_in6 *);
354 int ip6_output(struct mbuf *, struct ip6_pktopts *, struct route *, int,
355 struct ip6_moptions *, struct in6pcb *, struct ifnet **);
356 int ip6_if_output(struct ifnet * const, struct ifnet * const,
357 struct mbuf * const,
358 const struct sockaddr_in6 * const, const struct rtentry *);
359 int ip6_ctloutput(int, struct socket *, struct sockopt *);
360 int ip6_raw_ctloutput(int, struct socket *, struct sockopt *);
361 void ip6_initpktopts(struct ip6_pktopts *);
362 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *,
363 struct ip6_pktopts *, kauth_cred_t, int);
364 void ip6_clearpktopts(struct ip6_pktopts *, int);
365 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int);
366 int ip6_optlen(struct in6pcb *);
367
368 void ip6_statinc(u_int);
369
370 int route6_input(struct mbuf **, int *, int);
371
372 void frag6_init(void);
373 int frag6_input(struct mbuf **, int *, int);
374 int ip6_reass_packet(struct mbuf **, int);
375 void frag6_slowtimo(void);
376 void frag6_fasttimo(void);
377 void frag6_drain(void);
378 void frag6_drainstub(void);
379
380 int ip6flow_init(int);
381 void ip6flow_poolinit(void);
382 struct ip6flow *ip6flow_reap(int);
383 void ip6flow_create(struct route *, struct mbuf *);
384 void ip6flow_slowtimo(void);
385 int ip6flow_invalidate_all(int);
386
387 void rip6_init(void);
388 int rip6_input(struct mbuf **, int *, int);
389 void *rip6_ctlinput(int, const struct sockaddr *, void *);
390 int rip6_ctloutput(int, struct socket *, struct sockopt *);
391 int rip6_output(struct mbuf *, struct socket *, struct sockaddr_in6 *,
392 struct mbuf *);
393 int rip6_attach(struct socket *, int);
394 int rip6_usrreq(struct socket *,
395 int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *);
396
397 int dest6_input(struct mbuf **, int *, int);
398 int none_input(struct mbuf **, int *, int);
399
400 struct route;
401
402 int in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *,
403 struct ip6_moptions *, struct route *, struct in6_addr *,
404 struct ifnet **, struct psref *, struct in6_addr *);
405 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *,
406 struct route **, struct rtentry **, bool);
407 int ip6_get_membership(const struct sockopt *, struct ifnet **,
408 struct psref *, void *, size_t);
409
410 u_int32_t ip6_randomid(void);
411 u_int32_t ip6_randomflowlabel(void);
412 #endif /* _KERNEL */
413
414 #endif /* !_NETINET6_IP6_VAR_H_ */
415