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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 */
114 * Structure attached to inpcb.in6p_moptions and
115 * passed to ip6_output when IPv6 multicast options are in use.
116 * This structure is lazy-allocated.
118 struct ip6_moptions {
119 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
120 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */
121 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */
122 u_short im6o_num_memberships; /* no. memberships this socket */
123 u_short im6o_max_memberships; /* max memberships this socket */
124 struct in6_multi **im6o_membership; /* group memberships */
125 struct in6_mfilter *im6o_mfilters; /* source filters */
126 struct epoch_context imo6_epoch_ctx;
130 * Control options for outgoing packets
133 /* Routing header related info */
134 struct ip6po_rhinfo {
135 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
136 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */
138 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr
139 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route
141 /* Nexthop related info */
142 struct ip6po_nhinfo {
143 struct sockaddr *ip6po_nhi_nexthop;
144 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */
146 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop
147 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route
150 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */
151 int ip6po_hlim; /* Hoplimit for outgoing packets */
153 /* Outgoing IF/address information */
154 struct in6_pktinfo *ip6po_pktinfo;
156 /* Next-hop address information */
157 struct ip6po_nhinfo ip6po_nhinfo;
159 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
161 /* Destination options header (before a routing header) */
162 struct ip6_dest *ip6po_dest1;
164 /* Routing header related info. */
165 struct ip6po_rhinfo ip6po_rhinfo;
167 /* Destination options header (after a routing header) */
168 struct ip6_dest *ip6po_dest2;
170 int ip6po_tclass; /* traffic class */
172 int ip6po_minmtu; /* fragment vs PMTU discovery policy */
173 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/
174 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */
175 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */
177 int ip6po_prefer_tempaddr; /* whether temporary addresses are
178 preferred as source address */
179 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */
180 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */
181 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */
184 #if 0 /* parameters in this block is obsolete. do not reuse the values. */
185 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */
186 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */
188 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */
189 #define IP6PO_USECOA 0x08 /* use care of address */
193 * Control options for incoming packets
197 uint64_t ip6s_total; /* total packets received */
198 uint64_t ip6s_tooshort; /* packet too short */
199 uint64_t ip6s_toosmall; /* not enough data */
200 uint64_t ip6s_fragments; /* fragments received */
201 uint64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
202 uint64_t ip6s_fragtimeout; /* fragments timed out */
203 uint64_t ip6s_fragoverflow; /* fragments that exceeded limit */
204 uint64_t ip6s_forward; /* packets forwarded */
205 uint64_t ip6s_cantforward; /* packets rcvd for unreachable dest */
206 uint64_t ip6s_redirectsent; /* packets forwarded on same net */
207 uint64_t ip6s_delivered; /* datagrams delivered to upper level*/
208 uint64_t ip6s_localout; /* total ip packets generated here */
209 uint64_t ip6s_odropped; /* lost packets due to nobufs, etc. */
210 uint64_t ip6s_reassembled; /* total packets reassembled ok */
211 uint64_t ip6s_fragmented; /* datagrams successfully fragmented */
212 uint64_t ip6s_ofragments; /* output fragments created */
213 uint64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
214 uint64_t ip6s_badoptions; /* error in option processing */
215 uint64_t ip6s_noroute; /* packets discarded due to no route */
216 uint64_t ip6s_badvers; /* ip6 version != 6 */
217 uint64_t ip6s_rawout; /* total raw ip packets generated */
218 uint64_t ip6s_badscope; /* scope error */
219 uint64_t ip6s_notmember; /* don't join this multicast group */
220 #define IP6S_HDRCNT 256 /* headers count */
221 uint64_t ip6s_nxthist[IP6S_HDRCNT]; /* next header history */
222 uint64_t ip6s_m1; /* one mbuf */
223 #define IP6S_M2MMAX 32
224 uint64_t ip6s_m2m[IP6S_M2MMAX]; /* two or more mbuf */
225 uint64_t ip6s_mext1; /* one ext mbuf */
226 uint64_t ip6s_mext2m; /* two or more ext mbuf */
227 uint64_t ip6s_exthdrtoolong; /* ext hdr are not contiguous */
228 uint64_t ip6s_nogif; /* no match gif found */
229 uint64_t ip6s_toomanyhdr; /* discarded due to too many headers */
232 * statistics for improvement of the source address selection
234 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
236 #define IP6S_RULESMAX 16
237 #define IP6S_SCOPECNT 16
238 /* number of times that address selection fails */
239 uint64_t ip6s_sources_none;
240 /* number of times that an address on the outgoing I/F is chosen */
241 uint64_t ip6s_sources_sameif[IP6S_SCOPECNT];
242 /* number of times that an address on a non-outgoing I/F is chosen */
243 uint64_t ip6s_sources_otherif[IP6S_SCOPECNT];
245 * number of times that an address that has the same scope
246 * from the destination is chosen.
248 uint64_t ip6s_sources_samescope[IP6S_SCOPECNT];
250 * number of times that an address that has a different scope
251 * from the destination is chosen.
253 uint64_t ip6s_sources_otherscope[IP6S_SCOPECNT];
254 /* number of times that a deprecated address is chosen */
255 uint64_t ip6s_sources_deprecated[IP6S_SCOPECNT];
257 /* number of times that each rule of source selection is applied. */
258 uint64_t ip6s_sources_rule[IP6S_RULESMAX];
262 #include <sys/counter.h>
264 VNET_PCPUSTAT_DECLARE(struct ip6stat, ip6stat);
265 #define IP6STAT_ADD(name, val) \
266 VNET_PCPUSTAT_ADD(struct ip6stat, ip6stat, name, (val))
267 #define IP6STAT_SUB(name, val) IP6STAT_ADD(name, -(val))
268 #define IP6STAT_INC(name) IP6STAT_ADD(name, 1)
269 #define IP6STAT_DEC(name) IP6STAT_SUB(name, 1)
273 /* flags passed to ip6_output as last parameter */
274 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */
275 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
276 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
278 #ifdef __NO_STRICT_ALIGNMENT
279 #define IP6_HDR_ALIGNED_P(ip) 1
281 #define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0)
284 VNET_DECLARE(int, ip6_defhlim); /* default hop limit */
285 VNET_DECLARE(int, ip6_defmcasthlim); /* default multicast hop limit */
286 VNET_DECLARE(int, ip6_forwarding); /* act as router? */
287 VNET_DECLARE(int, ip6_use_deprecated); /* allow deprecated addr as source */
288 VNET_DECLARE(int, ip6_rr_prune); /* router renumbering prefix
289 * walk list every 5 sec. */
290 VNET_DECLARE(int, ip6_mcast_pmtu); /* enable pMTU discovery for multicast? */
291 VNET_DECLARE(int, ip6_v6only);
292 #define V_ip6_defhlim VNET(ip6_defhlim)
293 #define V_ip6_defmcasthlim VNET(ip6_defmcasthlim)
294 #define V_ip6_forwarding VNET(ip6_forwarding)
295 #define V_ip6_use_deprecated VNET(ip6_use_deprecated)
296 #define V_ip6_rr_prune VNET(ip6_rr_prune)
297 #define V_ip6_mcast_pmtu VNET(ip6_mcast_pmtu)
298 #define V_ip6_v6only VNET(ip6_v6only)
300 VNET_DECLARE(struct socket *, ip6_mrouter); /* multicast routing daemon */
301 VNET_DECLARE(int, ip6_sendredirects); /* send IP redirects when forwarding? */
302 VNET_DECLARE(int, ip6_maxfragpackets); /* Maximum packets in reassembly
304 VNET_DECLARE(int, ip6_maxfrags); /* Maximum fragments in reassembly
306 VNET_DECLARE(int, ip6_accept_rtadv); /* Acts as a host not a router */
307 VNET_DECLARE(int, ip6_no_radr); /* No defroute from RA */
308 VNET_DECLARE(int, ip6_norbit_raif); /* Disable R-bit in NA on RA
310 VNET_DECLARE(int, ip6_rfc6204w3); /* Accept defroute from RA even when
311 forwarding enabled */
312 VNET_DECLARE(int, ip6_log_interval);
313 VNET_DECLARE(time_t, ip6_log_time);
314 VNET_DECLARE(int, ip6_hdrnestlimit); /* upper limit of # of extension
316 VNET_DECLARE(int, ip6_dad_count); /* DupAddrDetectionTransmits */
317 #define V_ip6_mrouter VNET(ip6_mrouter)
318 #define V_ip6_sendredirects VNET(ip6_sendredirects)
319 #define V_ip6_maxfragpackets VNET(ip6_maxfragpackets)
320 #define V_ip6_maxfrags VNET(ip6_maxfrags)
321 #define V_ip6_accept_rtadv VNET(ip6_accept_rtadv)
322 #define V_ip6_no_radr VNET(ip6_no_radr)
323 #define V_ip6_norbit_raif VNET(ip6_norbit_raif)
324 #define V_ip6_rfc6204w3 VNET(ip6_rfc6204w3)
325 #define V_ip6_log_interval VNET(ip6_log_interval)
326 #define V_ip6_log_time VNET(ip6_log_time)
327 #define V_ip6_hdrnestlimit VNET(ip6_hdrnestlimit)
328 #define V_ip6_dad_count VNET(ip6_dad_count)
330 VNET_DECLARE(int, ip6_auto_flowlabel);
331 VNET_DECLARE(int, ip6_auto_linklocal);
332 #define V_ip6_auto_flowlabel VNET(ip6_auto_flowlabel)
333 #define V_ip6_auto_linklocal VNET(ip6_auto_linklocal)
335 VNET_DECLARE(int, ip6_use_tempaddr); /* Whether to use temporary addresses */
336 VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary
337 * addresses in the source address
339 #define V_ip6_use_tempaddr VNET(ip6_use_tempaddr)
340 #define V_ip6_prefer_tempaddr VNET(ip6_prefer_tempaddr)
342 VNET_DECLARE(int, ip6_use_defzone); /* Whether to use the default scope
343 * zone when unspecified */
344 #define V_ip6_use_defzone VNET(ip6_use_defzone)
346 VNET_DECLARE (struct pfil_head, inet6_pfil_hook); /* packet filter hooks */
347 #define V_inet6_pfil_hook VNET(inet6_pfil_hook)
349 VNET_DECLARE(int, ip6stealth);
350 #define V_ip6stealth VNET(ip6stealth)
353 extern struct pr_usrreqs rip6_usrreqs;
358 int icmp6_ctloutput(struct socket *, struct sockopt *sopt);
362 int ip6proto_register(short);
363 int ip6proto_unregister(short);
365 void ip6_input(struct mbuf *);
366 void ip6_direct_input(struct mbuf *);
367 void ip6_freepcbopts(struct ip6_pktopts *);
369 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int);
370 int ip6_get_prevhdr(const struct mbuf *, int);
371 int ip6_nexthdr(const struct mbuf *, int, int, int *);
372 int ip6_lasthdr(const struct mbuf *, int, int, int *);
374 extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *,
377 int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
379 struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *,
380 struct mbuf **, int *);
381 void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **);
382 void ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, u_int32_t);
383 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
385 void ip6_forward(struct mbuf *, int);
387 void ip6_mloopback(struct ifnet *, struct mbuf *);
388 int ip6_output(struct mbuf *, struct ip6_pktopts *,
391 struct ip6_moptions *, struct ifnet **,
393 int ip6_ctloutput(struct socket *, struct sockopt *);
394 int ip6_raw_ctloutput(struct socket *, struct sockopt *);
395 void ip6_initpktopts(struct ip6_pktopts *);
396 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *,
397 struct ip6_pktopts *, struct ucred *, int);
398 void ip6_clearpktopts(struct ip6_pktopts *, int);
399 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int);
400 int ip6_optlen(struct inpcb *);
401 int ip6_deletefraghdr(struct mbuf *, int, int);
402 int ip6_fragment(struct ifnet *, struct mbuf *, int, u_char, int,
405 int route6_input(struct mbuf **, int *, int);
407 void frag6_init(void);
408 int frag6_input(struct mbuf **, int *, int);
409 void frag6_slowtimo(void);
410 void frag6_drain(void);
412 void rip6_init(void);
413 int rip6_input(struct mbuf **, int *, int);
414 void rip6_ctlinput(int, struct sockaddr *, void *);
415 int rip6_ctloutput(struct socket *, struct sockopt *);
416 int rip6_output(struct mbuf *, struct socket *, ...);
417 int rip6_usrreq(struct socket *,
418 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *);
420 int dest6_input(struct mbuf **, int *, int);
421 int none_input(struct mbuf **, int *, int);
423 int in6_selectsrc_socket(struct sockaddr_in6 *, struct ip6_pktopts *,
424 struct inpcb *, struct ucred *, int, struct in6_addr *, int *);
425 int in6_selectsrc_addr(uint32_t, const struct in6_addr *,
426 uint32_t, struct ifnet *, struct in6_addr *, int *);
427 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *,
428 struct ip6_moptions *, struct route_in6 *, struct ifnet **,
430 int in6_selectroute_fib(struct sockaddr_in6 *, struct ip6_pktopts *,
431 struct ip6_moptions *, struct route_in6 *, struct ifnet **,
432 struct rtentry **, u_int);
433 u_int32_t ip6_randomid(void);
434 u_int32_t ip6_randomflowlabel(void);
435 void in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset);
438 #endif /* !_NETINET6_IP6_VAR_H_ */