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 struct label *ip6q_label;
87 };
88
89 struct ip6asfrag {
90 struct ip6asfrag *ip6af_down;
91 struct ip6asfrag *ip6af_up;
92 struct mbuf *ip6af_m;
93 int ip6af_offset; /* offset in ip6af_m to next header */
94 int ip6af_frglen; /* fragmentable part length */
95 int ip6af_off; /* fragment offset */
96 u_int16_t ip6af_mff; /* more fragment bit in frag off */
97 };
98
99 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
100
101 /*
102 * IP6 reinjecting structure.
103 */
104 struct ip6_direct_ctx {
105 uint32_t ip6dc_nxt; /* next header to process */
106 uint32_t ip6dc_off; /* offset to next header */
107 };
108
109 /*
110 * Structure attached to inpcb.in6p_moptions and
111 * passed to ip6_output when IPv6 multicast options are in use.
112 * This structure is lazy-allocated.
113 */
114 struct ip6_moptions {
115 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
116 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */
117 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */
118 u_short im6o_num_memberships; /* no. memberships this socket */
119 u_short im6o_max_memberships; /* max memberships this socket */
120 struct in6_multi **im6o_membership; /* group memberships */
121 struct in6_mfilter *im6o_mfilters; /* source filters */
122 };
123
124 /*
125 * Control options for outgoing packets
126 */
127
128 /* Routing header related info */
129 struct ip6po_rhinfo {
130 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
131 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */
132 };
133 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr
134 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route
135
136 /* Nexthop related info */
137 struct ip6po_nhinfo {
138 struct sockaddr *ip6po_nhi_nexthop;
139 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */
140 };
141 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop
142 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route
143
144 struct ip6_pktopts {
145 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */
146 int ip6po_hlim; /* Hoplimit for outgoing packets */
147
148 /* Outgoing IF/address information */
149 struct in6_pktinfo *ip6po_pktinfo;
150
151 /* Next-hop address information */
152 struct ip6po_nhinfo ip6po_nhinfo;
153
154 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
155
156 /* Destination options header (before a routing header) */
157 struct ip6_dest *ip6po_dest1;
158
159 /* Routing header related info. */
160 struct ip6po_rhinfo ip6po_rhinfo;
161
162 /* Destination options header (after a routing header) */
163 struct ip6_dest *ip6po_dest2;
164
165 int ip6po_tclass; /* traffic class */
166
167 int ip6po_minmtu; /* fragment vs PMTU discovery policy */
168 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/
169 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */
170 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */
171
172 int ip6po_prefer_tempaddr; /* whether temporary addresses are
173 preferred as source address */
174 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */
175 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */
176 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */
177
178 int ip6po_flags;
179 #if 0 /* parameters in this block is obsolete. do not reuse the values. */
180 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */
181 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */
182 #endif
183 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */
184 #define IP6PO_USECOA 0x08 /* use care of address */
185 };
186
187 /*
188 * Control options for incoming packets
189 */
190
191 struct ip6stat {
192 uint64_t ip6s_total; /* total packets received */
193 uint64_t ip6s_tooshort; /* packet too short */
194 uint64_t ip6s_toosmall; /* not enough data */
195 uint64_t ip6s_fragments; /* fragments received */
196 uint64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
197 uint64_t ip6s_fragtimeout; /* fragments timed out */
198 uint64_t ip6s_fragoverflow; /* fragments that exceeded limit */
199 uint64_t ip6s_forward; /* packets forwarded */
200 uint64_t ip6s_cantforward; /* packets rcvd for unreachable dest */
201 uint64_t ip6s_redirectsent; /* packets forwarded on same net */
202 uint64_t ip6s_delivered; /* datagrams delivered to upper level*/
203 uint64_t ip6s_localout; /* total ip packets generated here */
204 uint64_t ip6s_odropped; /* lost packets due to nobufs, etc. */
205 uint64_t ip6s_reassembled; /* total packets reassembled ok */
206 uint64_t ip6s_fragmented; /* datagrams successfully fragmented */
207 uint64_t ip6s_ofragments; /* output fragments created */
208 uint64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
209 uint64_t ip6s_badoptions; /* error in option processing */
210 uint64_t ip6s_noroute; /* packets discarded due to no route */
211 uint64_t ip6s_badvers; /* ip6 version != 6 */
212 uint64_t ip6s_rawout; /* total raw ip packets generated */
213 uint64_t ip6s_badscope; /* scope error */
214 uint64_t ip6s_notmember; /* don't join this multicast group */
215 #define IP6S_HDRCNT 256 /* headers count */
216 uint64_t ip6s_nxthist[IP6S_HDRCNT]; /* next header history */
217 uint64_t ip6s_m1; /* one mbuf */
218 #define IP6S_M2MMAX 32
219 uint64_t ip6s_m2m[IP6S_M2MMAX]; /* two or more mbuf */
220 uint64_t ip6s_mext1; /* one ext mbuf */
221 uint64_t ip6s_mext2m; /* two or more ext mbuf */
222 uint64_t ip6s_exthdrtoolong; /* ext hdr are not contiguous */
223 uint64_t ip6s_nogif; /* no match gif found */
224 uint64_t ip6s_toomanyhdr; /* discarded due to too many headers */
225
226 /*
227 * statistics for improvement of the source address selection
228 * algorithm:
229 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
230 */
231 #define IP6S_RULESMAX 16
232 #define IP6S_SCOPECNT 16
233 /* number of times that address selection fails */
234 uint64_t ip6s_sources_none;
235 /* number of times that an address on the outgoing I/F is chosen */
236 uint64_t ip6s_sources_sameif[IP6S_SCOPECNT];
237 /* number of times that an address on a non-outgoing I/F is chosen */
238 uint64_t ip6s_sources_otherif[IP6S_SCOPECNT];
239 /*
240 * number of times that an address that has the same scope
241 * from the destination is chosen.
242 */
243 uint64_t ip6s_sources_samescope[IP6S_SCOPECNT];
244 /*
245 * number of times that an address that has a different scope
246 * from the destination is chosen.
247 */
248 uint64_t ip6s_sources_otherscope[IP6S_SCOPECNT];
249 /* number of times that a deprecated address is chosen */
250 uint64_t ip6s_sources_deprecated[IP6S_SCOPECNT];
251
252 /* number of times that each rule of source selection is applied. */
253 uint64_t ip6s_sources_rule[IP6S_RULESMAX];
254 };
255
256 #ifdef _KERNEL
257 #include <sys/counter.h>
258
259 VNET_PCPUSTAT_DECLARE(struct ip6stat, ip6stat);
260 #define IP6STAT_ADD(name, val) \
261 VNET_PCPUSTAT_ADD(struct ip6stat, ip6stat, name, (val))
262 #define IP6STAT_SUB(name, val) IP6STAT_ADD(name, -(val))
263 #define IP6STAT_INC(name) IP6STAT_ADD(name, 1)
264 #define IP6STAT_DEC(name) IP6STAT_SUB(name, 1)
265 #endif
266
267 #ifdef _KERNEL
268 /* flags passed to ip6_output as last parameter */
269 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */
270 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
271 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
272
273 #ifdef __NO_STRICT_ALIGNMENT
274 #define IP6_HDR_ALIGNED_P(ip) 1
275 #else
276 #define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0)
277 #endif
278
279 VNET_DECLARE(int, ip6_defhlim); /* default hop limit */
280 VNET_DECLARE(int, ip6_defmcasthlim); /* default multicast hop limit */
281 VNET_DECLARE(int, ip6_forwarding); /* act as router? */
282 VNET_DECLARE(int, ip6_use_deprecated); /* allow deprecated addr as source */
283 VNET_DECLARE(int, ip6_rr_prune); /* router renumbering prefix
284 * walk list every 5 sec. */
285 VNET_DECLARE(int, ip6_mcast_pmtu); /* enable pMTU discovery for multicast? */
286 VNET_DECLARE(int, ip6_v6only);
287 #define V_ip6_defhlim VNET(ip6_defhlim)
288 #define V_ip6_defmcasthlim VNET(ip6_defmcasthlim)
289 #define V_ip6_forwarding VNET(ip6_forwarding)
290 #define V_ip6_use_deprecated VNET(ip6_use_deprecated)
291 #define V_ip6_rr_prune VNET(ip6_rr_prune)
292 #define V_ip6_mcast_pmtu VNET(ip6_mcast_pmtu)
293 #define V_ip6_v6only VNET(ip6_v6only)
294
295 VNET_DECLARE(struct socket *, ip6_mrouter); /* multicast routing daemon */
296 VNET_DECLARE(int, ip6_sendredirects); /* send IP redirects when forwarding? */
297 VNET_DECLARE(int, ip6_maxfragpackets); /* Maximum packets in reassembly
298 * queue */
299 extern int ip6_maxfrags; /* Maximum fragments in reassembly
300 * queue */
301 VNET_DECLARE(int, ip6_maxfragbucketsize); /* Maximum reassembly queues per bucket */
302 VNET_DECLARE(int, ip6_maxfragsperpacket); /* Maximum fragments per packet */
303 VNET_DECLARE(int, ip6_accept_rtadv); /* Acts as a host not a router */
304 VNET_DECLARE(int, ip6_no_radr); /* No defroute from RA */
305 VNET_DECLARE(int, ip6_norbit_raif); /* Disable R-bit in NA on RA
306 * receiving IF. */
307 VNET_DECLARE(int, ip6_rfc6204w3); /* Accept defroute from RA even when
308 forwarding enabled */
309 VNET_DECLARE(int, ip6_log_interval);
310 VNET_DECLARE(time_t, ip6_log_time);
311 VNET_DECLARE(int, ip6_hdrnestlimit); /* upper limit of # of extension
312 * headers */
313 VNET_DECLARE(int, ip6_dad_count); /* DupAddrDetectionTransmits */
314 #define V_ip6_mrouter VNET(ip6_mrouter)
315 #define V_ip6_sendredirects VNET(ip6_sendredirects)
316 #define V_ip6_maxfragpackets VNET(ip6_maxfragpackets)
317 #define V_ip6_maxfragbucketsize VNET(ip6_maxfragbucketsize)
318 #define V_ip6_maxfragsperpacket VNET(ip6_maxfragsperpacket)
319 #define V_ip6_accept_rtadv VNET(ip6_accept_rtadv)
320 #define V_ip6_no_radr VNET(ip6_no_radr)
321 #define V_ip6_norbit_raif VNET(ip6_norbit_raif)
322 #define V_ip6_rfc6204w3 VNET(ip6_rfc6204w3)
323 #define V_ip6_log_interval VNET(ip6_log_interval)
324 #define V_ip6_log_time VNET(ip6_log_time)
325 #define V_ip6_hdrnestlimit VNET(ip6_hdrnestlimit)
326 #define V_ip6_dad_count VNET(ip6_dad_count)
327
328 VNET_DECLARE(int, ip6_auto_flowlabel);
329 VNET_DECLARE(int, ip6_auto_linklocal);
330 #define V_ip6_auto_flowlabel VNET(ip6_auto_flowlabel)
331 #define V_ip6_auto_linklocal VNET(ip6_auto_linklocal)
332
333 VNET_DECLARE(int, ip6_use_tempaddr); /* Whether to use temporary addresses */
334 VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary
335 * addresses in the source address
336 * selection */
337 #define V_ip6_use_tempaddr VNET(ip6_use_tempaddr)
338 #define V_ip6_prefer_tempaddr VNET(ip6_prefer_tempaddr)
339
340 VNET_DECLARE(int, ip6_use_defzone); /* Whether to use the default scope
341 * zone when unspecified */
342 #define V_ip6_use_defzone VNET(ip6_use_defzone)
343
344 VNET_DECLARE (struct pfil_head, inet6_pfil_hook); /* packet filter hooks */
345 #define V_inet6_pfil_hook VNET(inet6_pfil_hook)
346 #ifdef IPSTEALTH
347 VNET_DECLARE(int, ip6stealth);
348 #define V_ip6stealth VNET(ip6stealth)
349 #endif
350
351 extern struct pr_usrreqs rip6_usrreqs;
352 struct sockopt;
353
354 struct inpcb;
355
356 int icmp6_ctloutput(struct socket *, struct sockopt *sopt);
357
358 struct in6_ifaddr;
359 void ip6_init(void);
360 int ip6proto_register(short);
361 int ip6proto_unregister(short);
362
363 void ip6_input(struct mbuf *);
364 void ip6_direct_input(struct mbuf *);
365 void ip6_freepcbopts(struct ip6_pktopts *);
366
367 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int);
368 int ip6_get_prevhdr(const struct mbuf *, int);
369 int ip6_nexthdr(const struct mbuf *, int, int, int *);
370 int ip6_lasthdr(const struct mbuf *, int, int, int *);
371
372 extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *,
373 struct mbuf *);
374
375 int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
376 u_int32_t *);
377 struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *,
378 struct mbuf **, int *);
379 void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **);
380 void ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, u_int32_t);
381 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
382
383 void ip6_forward(struct mbuf *, int);
384
385 void ip6_mloopback(struct ifnet *, struct mbuf *);
386 int ip6_output(struct mbuf *, struct ip6_pktopts *,
387 struct route_in6 *,
388 int,
389 struct ip6_moptions *, struct ifnet **,
390 struct inpcb *);
391 int ip6_ctloutput(struct socket *, struct sockopt *);
392 int ip6_raw_ctloutput(struct socket *, struct sockopt *);
393 void ip6_initpktopts(struct ip6_pktopts *);
394 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *,
395 struct ip6_pktopts *, struct ucred *, int);
396 void ip6_clearpktopts(struct ip6_pktopts *, int);
397 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int);
398 int ip6_optlen(struct inpcb *);
399 int ip6_deletefraghdr(struct mbuf *, int, int);
400 int ip6_fragment(struct ifnet *, struct mbuf *, int, u_char, int,
401 uint32_t);
402
403 int route6_input(struct mbuf **, int *, int);
404
405 void frag6_set_bucketsize(void);
406 void frag6_init(void);
407 int frag6_input(struct mbuf **, int *, int);
408 void frag6_slowtimo(void);
409 void frag6_drain(void);
410
411 void rip6_init(void);
412 int rip6_input(struct mbuf **, int *, int);
413 void rip6_ctlinput(int, struct sockaddr *, void *);
414 int rip6_ctloutput(struct socket *, struct sockopt *);
415 int rip6_output(struct mbuf *, struct socket *, ...);
416 int rip6_usrreq(struct socket *,
417 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *);
418
419 int dest6_input(struct mbuf **, int *, int);
420 int none_input(struct mbuf **, int *, int);
421
422 int in6_selectsrc_socket(struct sockaddr_in6 *, struct ip6_pktopts *,
423 struct inpcb *, struct ucred *, int, struct in6_addr *, int *);
424 int in6_selectsrc_addr(uint32_t, const struct in6_addr *,
425 uint32_t, struct ifnet *, struct in6_addr *, int *);
426 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *,
427 struct ip6_moptions *, struct route_in6 *, struct ifnet **,
428 struct rtentry **);
429 int in6_selectroute_fib(struct sockaddr_in6 *, struct ip6_pktopts *,
430 struct ip6_moptions *, struct route_in6 *, struct ifnet **,
431 struct rtentry **, u_int);
432 u_int32_t ip6_randomid(void);
433 u_int32_t ip6_randomflowlabel(void);
434 void in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset);
435 #endif /* _KERNEL */
436
437 #endif /* !_NETINET6_IP6_VAR_H_ */
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