2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
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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
29 * $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $
33 * Copyright (c) 1982, 1986, 1993
34 * The Regents of the University of California. All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
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.
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
60 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93
64 #ifndef _NETINET6_IP6_VAR_H_
65 #define _NETINET6_IP6_VAR_H_
68 * IP6 reassembly queue structure. Each fragment
69 * being reassembled is attached to one of these structures.
72 struct ip6asfrag *ip6q_down;
73 struct ip6asfrag *ip6q_up;
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 */
85 int ip6q_nfrag; /* # of fragments */
86 struct label *ip6q_label;
90 struct ip6asfrag *ip6af_down;
91 struct ip6asfrag *ip6af_up;
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 */
99 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
102 * Structure attached to inpcb.in6p_moptions and
103 * passed to ip6_output when IPv6 multicast options are in use.
104 * This structure is lazy-allocated.
106 struct ip6_moptions {
107 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
108 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */
109 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */
110 u_short im6o_num_memberships; /* no. memberships this socket */
111 u_short im6o_max_memberships; /* max memberships this socket */
112 struct in6_multi **im6o_membership; /* group memberships */
113 struct in6_mfilter *im6o_mfilters; /* source filters */
117 * Control options for outgoing packets
120 /* Routing header related info */
121 struct ip6po_rhinfo {
122 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
123 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */
125 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr
126 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route
128 /* Nexthop related info */
129 struct ip6po_nhinfo {
130 struct sockaddr *ip6po_nhi_nexthop;
131 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */
133 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop
134 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route
137 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */
138 int ip6po_hlim; /* Hoplimit for outgoing packets */
140 /* Outgoing IF/address information */
141 struct in6_pktinfo *ip6po_pktinfo;
143 /* Next-hop address information */
144 struct ip6po_nhinfo ip6po_nhinfo;
146 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
148 /* Destination options header (before a routing header) */
149 struct ip6_dest *ip6po_dest1;
151 /* Routing header related info. */
152 struct ip6po_rhinfo ip6po_rhinfo;
154 /* Destination options header (after a routing header) */
155 struct ip6_dest *ip6po_dest2;
157 int ip6po_tclass; /* traffic class */
159 int ip6po_minmtu; /* fragment vs PMTU discovery policy */
160 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/
161 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */
162 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */
164 int ip6po_prefer_tempaddr; /* whether temporary addresses are
165 preferred as source address */
166 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */
167 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */
168 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */
171 #if 0 /* parameters in this block is obsolete. do not reuse the values. */
172 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */
173 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */
175 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */
176 #define IP6PO_USECOA 0x08 /* use care of address */
180 * Control options for incoming packets
184 uint64_t ip6s_total; /* total packets received */
185 uint64_t ip6s_tooshort; /* packet too short */
186 uint64_t ip6s_toosmall; /* not enough data */
187 uint64_t ip6s_fragments; /* fragments received */
188 uint64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
189 uint64_t ip6s_fragtimeout; /* fragments timed out */
190 uint64_t ip6s_fragoverflow; /* fragments that exceeded limit */
191 uint64_t ip6s_forward; /* packets forwarded */
192 uint64_t ip6s_cantforward; /* packets rcvd for unreachable dest */
193 uint64_t ip6s_redirectsent; /* packets forwarded on same net */
194 uint64_t ip6s_delivered; /* datagrams delivered to upper level*/
195 uint64_t ip6s_localout; /* total ip packets generated here */
196 uint64_t ip6s_odropped; /* lost packets due to nobufs, etc. */
197 uint64_t ip6s_reassembled; /* total packets reassembled ok */
198 uint64_t ip6s_fragmented; /* datagrams successfully fragmented */
199 uint64_t ip6s_ofragments; /* output fragments created */
200 uint64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
201 uint64_t ip6s_badoptions; /* error in option processing */
202 uint64_t ip6s_noroute; /* packets discarded due to no route */
203 uint64_t ip6s_badvers; /* ip6 version != 6 */
204 uint64_t ip6s_rawout; /* total raw ip packets generated */
205 uint64_t ip6s_badscope; /* scope error */
206 uint64_t ip6s_notmember; /* don't join this multicast group */
207 #define IP6S_HDRCNT 256 /* headers count */
208 uint64_t ip6s_nxthist[IP6S_HDRCNT]; /* next header history */
209 uint64_t ip6s_m1; /* one mbuf */
210 #define IP6S_M2MMAX 32
211 uint64_t ip6s_m2m[IP6S_M2MMAX]; /* two or more mbuf */
212 uint64_t ip6s_mext1; /* one ext mbuf */
213 uint64_t ip6s_mext2m; /* two or more ext mbuf */
214 uint64_t ip6s_exthdrtoolong; /* ext hdr are not contiguous */
215 uint64_t ip6s_nogif; /* no match gif found */
216 uint64_t ip6s_toomanyhdr; /* discarded due to too many headers */
219 * statistics for improvement of the source address selection
221 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
223 #define IP6S_RULESMAX 16
224 #define IP6S_SCOPECNT 16
225 /* number of times that address selection fails */
226 uint64_t ip6s_sources_none;
227 /* number of times that an address on the outgoing I/F is chosen */
228 uint64_t ip6s_sources_sameif[IP6S_SCOPECNT];
229 /* number of times that an address on a non-outgoing I/F is chosen */
230 uint64_t ip6s_sources_otherif[IP6S_SCOPECNT];
232 * number of times that an address that has the same scope
233 * from the destination is chosen.
235 uint64_t ip6s_sources_samescope[IP6S_SCOPECNT];
237 * number of times that an address that has a different scope
238 * from the destination is chosen.
240 uint64_t ip6s_sources_otherscope[IP6S_SCOPECNT];
241 /* number of times that a deprecated address is chosen */
242 uint64_t ip6s_sources_deprecated[IP6S_SCOPECNT];
244 /* number of times that each rule of source selection is applied. */
245 uint64_t ip6s_sources_rule[IP6S_RULESMAX];
249 #include <sys/counter.h>
251 VNET_PCPUSTAT_DECLARE(struct ip6stat, ip6stat);
252 #define IP6STAT_ADD(name, val) \
253 VNET_PCPUSTAT_ADD(struct ip6stat, ip6stat, name, (val))
254 #define IP6STAT_SUB(name, val) IP6STAT_ADD(name, -(val))
255 #define IP6STAT_INC(name) IP6STAT_ADD(name, 1)
256 #define IP6STAT_DEC(name) IP6STAT_SUB(name, 1)
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) */
265 #ifdef __NO_STRICT_ALIGNMENT
266 #define IP6_HDR_ALIGNED_P(ip) 1
268 #define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0)
271 VNET_DECLARE(int, ip6_defhlim); /* default hop limit */
272 VNET_DECLARE(int, ip6_defmcasthlim); /* default multicast hop limit */
273 VNET_DECLARE(int, ip6_forwarding); /* act as router? */
274 VNET_DECLARE(int, ip6_use_deprecated); /* allow deprecated addr as source */
275 VNET_DECLARE(int, ip6_rr_prune); /* router renumbering prefix
276 * walk list every 5 sec. */
277 VNET_DECLARE(int, ip6_mcast_pmtu); /* enable pMTU discovery for multicast? */
278 VNET_DECLARE(int, ip6_v6only);
279 #define V_ip6_defhlim VNET(ip6_defhlim)
280 #define V_ip6_defmcasthlim VNET(ip6_defmcasthlim)
281 #define V_ip6_forwarding VNET(ip6_forwarding)
282 #define V_ip6_use_deprecated VNET(ip6_use_deprecated)
283 #define V_ip6_rr_prune VNET(ip6_rr_prune)
284 #define V_ip6_mcast_pmtu VNET(ip6_mcast_pmtu)
285 #define V_ip6_v6only VNET(ip6_v6only)
287 VNET_DECLARE(struct socket *, ip6_mrouter); /* multicast routing daemon */
288 VNET_DECLARE(int, ip6_sendredirects); /* send IP redirects when forwarding? */
289 VNET_DECLARE(int, ip6_maxfragpackets); /* Maximum packets in reassembly
291 VNET_DECLARE(int, ip6_maxfrags); /* Maximum fragments in reassembly
293 VNET_DECLARE(int, ip6_accept_rtadv); /* Acts as a host not a router */
294 VNET_DECLARE(int, ip6_no_radr); /* No defroute from RA */
295 VNET_DECLARE(int, ip6_norbit_raif); /* Disable R-bit in NA on RA
297 VNET_DECLARE(int, ip6_rfc6204w3); /* Accept defroute from RA even when
298 forwarding enabled */
299 VNET_DECLARE(int, ip6_log_interval);
300 VNET_DECLARE(time_t, ip6_log_time);
301 VNET_DECLARE(int, ip6_hdrnestlimit); /* upper limit of # of extension
303 VNET_DECLARE(int, ip6_dad_count); /* DupAddrDetectionTransmits */
304 #define V_ip6_mrouter VNET(ip6_mrouter)
305 #define V_ip6_sendredirects VNET(ip6_sendredirects)
306 #define V_ip6_maxfragpackets VNET(ip6_maxfragpackets)
307 #define V_ip6_maxfrags VNET(ip6_maxfrags)
308 #define V_ip6_accept_rtadv VNET(ip6_accept_rtadv)
309 #define V_ip6_no_radr VNET(ip6_no_radr)
310 #define V_ip6_norbit_raif VNET(ip6_norbit_raif)
311 #define V_ip6_rfc6204w3 VNET(ip6_rfc6204w3)
312 #define V_ip6_log_interval VNET(ip6_log_interval)
313 #define V_ip6_log_time VNET(ip6_log_time)
314 #define V_ip6_hdrnestlimit VNET(ip6_hdrnestlimit)
315 #define V_ip6_dad_count VNET(ip6_dad_count)
317 VNET_DECLARE(int, ip6_auto_flowlabel);
318 VNET_DECLARE(int, ip6_auto_linklocal);
319 #define V_ip6_auto_flowlabel VNET(ip6_auto_flowlabel)
320 #define V_ip6_auto_linklocal VNET(ip6_auto_linklocal)
322 VNET_DECLARE(int, ip6_use_tempaddr); /* Whether to use temporary addresses */
323 VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary
324 * addresses in the source address
326 #define V_ip6_use_tempaddr VNET(ip6_use_tempaddr)
327 #define V_ip6_prefer_tempaddr VNET(ip6_prefer_tempaddr)
329 VNET_DECLARE(int, ip6_use_defzone); /* Whether to use the default scope
330 * zone when unspecified */
331 #define V_ip6_use_defzone VNET(ip6_use_defzone)
333 VNET_DECLARE (struct pfil_head, inet6_pfil_hook); /* packet filter hooks */
334 #define V_inet6_pfil_hook VNET(inet6_pfil_hook)
336 VNET_DECLARE(int, ip6stealth);
337 #define V_ip6stealth VNET(ip6stealth)
340 extern struct pr_usrreqs rip6_usrreqs;
345 int icmp6_ctloutput(struct socket *, struct sockopt *sopt);
350 void ip6_destroy(void);
352 int ip6proto_register(short);
353 int ip6proto_unregister(short);
355 void ip6_input(struct mbuf *);
356 void ip6_freepcbopts(struct ip6_pktopts *);
358 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int);
359 char * ip6_get_prevhdr(const struct mbuf *, int);
360 int ip6_nexthdr(const struct mbuf *, int, int, int *);
361 int ip6_lasthdr(const struct mbuf *, int, int, int *);
363 extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *,
366 int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
368 struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *,
369 struct mbuf **, int *);
370 void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **);
371 void ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, u_int32_t);
372 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
374 void ip6_forward(struct mbuf *, int);
376 void ip6_mloopback(struct ifnet *, const struct mbuf *);
377 int ip6_output(struct mbuf *, struct ip6_pktopts *,
380 struct ip6_moptions *, struct ifnet **,
382 int ip6_ctloutput(struct socket *, struct sockopt *);
383 int ip6_raw_ctloutput(struct socket *, struct sockopt *);
384 void ip6_initpktopts(struct ip6_pktopts *);
385 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *,
386 struct ip6_pktopts *, struct ucred *, int);
387 void ip6_clearpktopts(struct ip6_pktopts *, int);
388 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int);
389 int ip6_optlen(struct inpcb *);
390 int ip6_deletefraghdr(struct mbuf *, int, int);
391 int ip6_fragment(struct ifnet *, struct mbuf *, int, u_char, int,
394 int route6_input(struct mbuf **, int *, int);
396 void frag6_init(void);
397 int frag6_input(struct mbuf **, int *, int);
398 void frag6_slowtimo(void);
399 void frag6_drain(void);
401 void rip6_init(void);
402 int rip6_input(struct mbuf **, int *, int);
403 void rip6_ctlinput(int, struct sockaddr *, void *);
404 int rip6_ctloutput(struct socket *, struct sockopt *);
405 int rip6_output(struct mbuf *, struct socket *, ...);
406 int rip6_usrreq(struct socket *,
407 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *);
409 int dest6_input(struct mbuf **, int *, int);
410 int none_input(struct mbuf **, int *, int);
412 int in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *,
413 struct inpcb *inp, struct route_in6 *, struct ucred *cred,
414 struct ifnet **, struct in6_addr *);
415 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *,
416 struct ip6_moptions *, struct route_in6 *, struct ifnet **,
418 int in6_selectroute_fib(struct sockaddr_in6 *, struct ip6_pktopts *,
419 struct ip6_moptions *, struct route_in6 *, struct ifnet **,
420 struct rtentry **, u_int);
421 u_int32_t ip6_randomid(void);
422 u_int32_t ip6_randomflowlabel(void);
423 void in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset);
426 #endif /* !_NETINET6_IP6_VAR_H_ */