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31 * $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $
35 * Copyright (c) 1982, 1986, 1993
36 * The Regents of the University of California. All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. Neither the name of the University nor the names of its contributors
47 * may be used to endorse or promote products derived from this software
48 * without specific prior written permission.
50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93
66 #ifndef _NETINET6_IP6_VAR_H_
67 #define _NETINET6_IP6_VAR_H_
69 #include <sys/epoch.h>
72 * IP6 reassembly queue structure. Each fragment
73 * being reassembled is attached to one of these structures.
76 struct ip6asfrag *ip6q_down;
77 struct ip6asfrag *ip6q_up;
82 struct in6_addr ip6q_src, ip6q_dst;
83 struct ip6q *ip6q_next;
84 struct ip6q *ip6q_prev;
85 int ip6q_unfrglen; /* len of unfragmentable part */
89 int ip6q_nfrag; /* # of fragments */
90 struct label *ip6q_label;
94 struct ip6asfrag *ip6af_down;
95 struct ip6asfrag *ip6af_up;
97 int ip6af_offset; /* offset in ip6af_m to next header */
98 int ip6af_frglen; /* fragmentable part length */
99 int ip6af_off; /* fragment offset */
100 u_int16_t ip6af_mff; /* more fragment bit in frag off */
103 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
106 * IP6 reinjecting structure.
108 struct ip6_direct_ctx {
109 uint32_t ip6dc_nxt; /* next header to process */
110 uint32_t ip6dc_off; /* offset to next header */
113 #if defined(_NETINET6_IN6_VAR_H_) && defined(_KERNEL)
115 * Structure attached to inpcb.in6p_moptions and
116 * passed to ip6_output when IPv6 multicast options are in use.
117 * This structure is lazy-allocated.
119 struct ip6_moptions {
120 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
121 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */
122 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */
123 struct ip6_mfilter_head im6o_head; /* group membership list */
129 * Control options for outgoing packets
132 /* Routing header related info */
133 struct ip6po_rhinfo {
134 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
135 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */
137 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr
138 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route
140 /* Nexthop related info */
141 struct ip6po_nhinfo {
142 struct sockaddr *ip6po_nhi_nexthop;
143 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */
145 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop
146 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route
149 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */
150 int ip6po_hlim; /* Hoplimit for outgoing packets */
152 /* Outgoing IF/address information */
153 struct in6_pktinfo *ip6po_pktinfo;
155 /* Next-hop address information */
156 struct ip6po_nhinfo ip6po_nhinfo;
158 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
160 /* Destination options header (before a routing header) */
161 struct ip6_dest *ip6po_dest1;
163 /* Routing header related info. */
164 struct ip6po_rhinfo ip6po_rhinfo;
166 /* Destination options header (after a routing header) */
167 struct ip6_dest *ip6po_dest2;
169 int ip6po_tclass; /* traffic class */
171 int ip6po_minmtu; /* fragment vs PMTU discovery policy */
172 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/
173 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */
174 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */
176 int ip6po_prefer_tempaddr; /* whether temporary addresses are
177 preferred as source address */
178 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */
179 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */
180 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */
183 #if 0 /* parameters in this block is obsolete. do not reuse the values. */
184 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */
185 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */
187 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */
188 #define IP6PO_USECOA 0x08 /* use care of address */
192 * Control options for incoming packets
196 uint64_t ip6s_total; /* total packets received */
197 uint64_t ip6s_tooshort; /* packet too short */
198 uint64_t ip6s_toosmall; /* not enough data */
199 uint64_t ip6s_fragments; /* fragments received */
200 uint64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
201 uint64_t ip6s_fragtimeout; /* fragments timed out */
202 uint64_t ip6s_fragoverflow; /* fragments that exceeded limit */
203 uint64_t ip6s_forward; /* packets forwarded */
204 uint64_t ip6s_cantforward; /* packets rcvd for unreachable dest */
205 uint64_t ip6s_redirectsent; /* packets forwarded on same net */
206 uint64_t ip6s_delivered; /* datagrams delivered to upper level*/
207 uint64_t ip6s_localout; /* total ip packets generated here */
208 uint64_t ip6s_odropped; /* lost packets due to nobufs, etc. */
209 uint64_t ip6s_reassembled; /* total packets reassembled ok */
210 uint64_t ip6s_fragmented; /* datagrams successfully fragmented */
211 uint64_t ip6s_ofragments; /* output fragments created */
212 uint64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
213 uint64_t ip6s_badoptions; /* error in option processing */
214 uint64_t ip6s_noroute; /* packets discarded due to no route */
215 uint64_t ip6s_badvers; /* ip6 version != 6 */
216 uint64_t ip6s_rawout; /* total raw ip packets generated */
217 uint64_t ip6s_badscope; /* scope error */
218 uint64_t ip6s_notmember; /* don't join this multicast group */
219 #define IP6S_HDRCNT 256 /* headers count */
220 uint64_t ip6s_nxthist[IP6S_HDRCNT]; /* next header history */
221 uint64_t ip6s_m1; /* one mbuf */
222 #define IP6S_M2MMAX 32
223 uint64_t ip6s_m2m[IP6S_M2MMAX]; /* two or more mbuf */
224 uint64_t ip6s_mext1; /* one ext mbuf */
225 uint64_t ip6s_mext2m; /* two or more ext mbuf */
226 uint64_t ip6s_exthdrtoolong; /* ext hdr are not contiguous */
227 uint64_t ip6s_nogif; /* no match gif found */
228 uint64_t ip6s_toomanyhdr; /* discarded due to too many headers */
231 * statistics for improvement of the source address selection
233 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
235 #define IP6S_RULESMAX 16
236 #define IP6S_SCOPECNT 16
237 /* number of times that address selection fails */
238 uint64_t ip6s_sources_none;
239 /* number of times that an address on the outgoing I/F is chosen */
240 uint64_t ip6s_sources_sameif[IP6S_SCOPECNT];
241 /* number of times that an address on a non-outgoing I/F is chosen */
242 uint64_t ip6s_sources_otherif[IP6S_SCOPECNT];
244 * number of times that an address that has the same scope
245 * from the destination is chosen.
247 uint64_t ip6s_sources_samescope[IP6S_SCOPECNT];
249 * number of times that an address that has a different scope
250 * from the destination is chosen.
252 uint64_t ip6s_sources_otherscope[IP6S_SCOPECNT];
253 /* number of times that a deprecated address is chosen */
254 uint64_t ip6s_sources_deprecated[IP6S_SCOPECNT];
256 /* number of times that each rule of source selection is applied. */
257 uint64_t ip6s_sources_rule[IP6S_RULESMAX];
261 #include <sys/counter.h>
263 VNET_PCPUSTAT_DECLARE(struct ip6stat, ip6stat);
264 #define IP6STAT_ADD(name, val) \
265 VNET_PCPUSTAT_ADD(struct ip6stat, ip6stat, name, (val))
266 #define IP6STAT_SUB(name, val) IP6STAT_ADD(name, -(val))
267 #define IP6STAT_INC(name) IP6STAT_ADD(name, 1)
268 #define IP6STAT_DEC(name) IP6STAT_SUB(name, 1)
272 /* flags passed to ip6_output as last parameter */
273 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */
274 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
275 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
277 #ifdef __NO_STRICT_ALIGNMENT
278 #define IP6_HDR_ALIGNED_P(ip) 1
280 #define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0)
283 VNET_DECLARE(int, ip6_defhlim); /* default hop limit */
284 VNET_DECLARE(int, ip6_defmcasthlim); /* default multicast hop limit */
285 VNET_DECLARE(int, ip6_forwarding); /* act as router? */
286 VNET_DECLARE(int, ip6_use_deprecated); /* allow deprecated addr as source */
287 VNET_DECLARE(int, ip6_rr_prune); /* router renumbering prefix
288 * walk list every 5 sec. */
289 VNET_DECLARE(int, ip6_mcast_pmtu); /* enable pMTU discovery for multicast? */
290 VNET_DECLARE(int, ip6_v6only);
291 #define V_ip6_defhlim VNET(ip6_defhlim)
292 #define V_ip6_defmcasthlim VNET(ip6_defmcasthlim)
293 #define V_ip6_forwarding VNET(ip6_forwarding)
294 #define V_ip6_use_deprecated VNET(ip6_use_deprecated)
295 #define V_ip6_rr_prune VNET(ip6_rr_prune)
296 #define V_ip6_mcast_pmtu VNET(ip6_mcast_pmtu)
297 #define V_ip6_v6only VNET(ip6_v6only)
299 VNET_DECLARE(struct socket *, ip6_mrouter); /* multicast routing daemon */
300 VNET_DECLARE(int, ip6_sendredirects); /* send IP redirects when forwarding? */
301 VNET_DECLARE(int, ip6_maxfragpackets); /* Maximum packets in reassembly
303 extern int ip6_maxfrags; /* Maximum fragments in reassembly
305 VNET_DECLARE(int, ip6_maxfragbucketsize); /* Maximum reassembly queues per bucket */
306 VNET_DECLARE(int, ip6_maxfragsperpacket); /* Maximum fragments per packet */
307 VNET_DECLARE(int, ip6_accept_rtadv); /* Acts as a host not a router */
308 VNET_DECLARE(int, ip6_no_radr); /* No defroute from RA */
309 VNET_DECLARE(int, ip6_norbit_raif); /* Disable R-bit in NA on RA
311 VNET_DECLARE(int, ip6_rfc6204w3); /* Accept defroute from RA even when
312 forwarding enabled */
313 VNET_DECLARE(int, ip6_log_interval);
314 VNET_DECLARE(time_t, ip6_log_time);
315 VNET_DECLARE(int, ip6_hdrnestlimit); /* upper limit of # of extension
317 VNET_DECLARE(int, ip6_dad_count); /* DupAddrDetectionTransmits */
318 #define V_ip6_mrouter VNET(ip6_mrouter)
319 #define V_ip6_sendredirects VNET(ip6_sendredirects)
320 #define V_ip6_maxfragpackets VNET(ip6_maxfragpackets)
321 #define V_ip6_maxfragbucketsize VNET(ip6_maxfragbucketsize)
322 #define V_ip6_maxfragsperpacket VNET(ip6_maxfragsperpacket)
323 #define V_ip6_accept_rtadv VNET(ip6_accept_rtadv)
324 #define V_ip6_no_radr VNET(ip6_no_radr)
325 #define V_ip6_norbit_raif VNET(ip6_norbit_raif)
326 #define V_ip6_rfc6204w3 VNET(ip6_rfc6204w3)
327 #define V_ip6_log_interval VNET(ip6_log_interval)
328 #define V_ip6_log_time VNET(ip6_log_time)
329 #define V_ip6_hdrnestlimit VNET(ip6_hdrnestlimit)
330 #define V_ip6_dad_count VNET(ip6_dad_count)
332 VNET_DECLARE(int, ip6_auto_flowlabel);
333 VNET_DECLARE(int, ip6_auto_linklocal);
334 #define V_ip6_auto_flowlabel VNET(ip6_auto_flowlabel)
335 #define V_ip6_auto_linklocal VNET(ip6_auto_linklocal)
337 VNET_DECLARE(int, ip6_use_tempaddr); /* Whether to use temporary addresses */
338 VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary
339 * addresses in the source address
341 #define V_ip6_use_tempaddr VNET(ip6_use_tempaddr)
342 #define V_ip6_prefer_tempaddr VNET(ip6_prefer_tempaddr)
344 VNET_DECLARE(int, ip6_use_defzone); /* Whether to use the default scope
345 * zone when unspecified */
346 #define V_ip6_use_defzone VNET(ip6_use_defzone)
348 VNET_DECLARE (struct pfil_head, inet6_pfil_hook); /* packet filter hooks */
349 #define V_inet6_pfil_hook VNET(inet6_pfil_hook)
351 VNET_DECLARE(int, ip6stealth);
352 #define V_ip6stealth VNET(ip6stealth)
355 extern struct pr_usrreqs rip6_usrreqs;
360 int icmp6_ctloutput(struct socket *, struct sockopt *sopt);
364 int ip6proto_register(short);
365 int ip6proto_unregister(short);
367 void ip6_input(struct mbuf *);
368 void ip6_direct_input(struct mbuf *);
369 void ip6_freepcbopts(struct ip6_pktopts *);
371 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int);
372 int ip6_get_prevhdr(const struct mbuf *, int);
373 int ip6_nexthdr(const struct mbuf *, int, int, int *);
374 int ip6_lasthdr(const struct mbuf *, int, int, int *);
376 extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *,
379 int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
381 struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *,
382 struct mbuf **, int *);
383 void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **);
384 void ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, u_int32_t);
385 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
387 void ip6_forward(struct mbuf *, int);
389 void ip6_mloopback(struct ifnet *, struct mbuf *);
390 int ip6_output(struct mbuf *, struct ip6_pktopts *,
393 struct ip6_moptions *, struct ifnet **,
395 int ip6_ctloutput(struct socket *, struct sockopt *);
396 int ip6_raw_ctloutput(struct socket *, struct sockopt *);
397 void ip6_initpktopts(struct ip6_pktopts *);
398 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *,
399 struct ip6_pktopts *, struct ucred *, int);
400 void ip6_clearpktopts(struct ip6_pktopts *, int);
401 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int);
402 int ip6_optlen(struct inpcb *);
403 int ip6_deletefraghdr(struct mbuf *, int, int);
404 int ip6_fragment(struct ifnet *, struct mbuf *, int, u_char, int,
407 int route6_input(struct mbuf **, int *, int);
409 void frag6_set_bucketsize(void);
410 void frag6_init(void);
411 int frag6_input(struct mbuf **, int *, int);
412 void frag6_slowtimo(void);
413 void frag6_drain(void);
415 void rip6_init(void);
416 int rip6_input(struct mbuf **, int *, int);
417 void rip6_ctlinput(int, struct sockaddr *, void *);
418 int rip6_ctloutput(struct socket *, struct sockopt *);
419 int rip6_output(struct mbuf *, struct socket *, ...);
420 int rip6_usrreq(struct socket *,
421 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *);
423 int dest6_input(struct mbuf **, int *, int);
424 int none_input(struct mbuf **, int *, int);
426 int in6_selectsrc_socket(struct sockaddr_in6 *, struct ip6_pktopts *,
427 struct inpcb *, struct ucred *, int, struct in6_addr *, int *);
428 int in6_selectsrc_addr(uint32_t, const struct in6_addr *,
429 uint32_t, struct ifnet *, struct in6_addr *, int *);
430 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *,
431 struct ip6_moptions *, struct route_in6 *, struct ifnet **,
433 int in6_selectroute_fib(struct sockaddr_in6 *, struct ip6_pktopts *,
434 struct ip6_moptions *, struct route_in6 *, struct ifnet **,
435 struct rtentry **, u_int);
436 u_int32_t ip6_randomid(void);
437 u_int32_t ip6_randomflowlabel(void);
438 void in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset);
441 #endif /* !_NETINET6_IP6_VAR_H_ */