2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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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 u_quad_t ip6s_total; /* total packets received */
185 u_quad_t ip6s_tooshort; /* packet too short */
186 u_quad_t ip6s_toosmall; /* not enough data */
187 u_quad_t ip6s_fragments; /* fragments received */
188 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
189 u_quad_t ip6s_fragtimeout; /* fragments timed out */
190 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */
191 u_quad_t ip6s_forward; /* packets forwarded */
192 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */
193 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */
194 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/
195 u_quad_t ip6s_localout; /* total ip packets generated here */
196 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */
197 u_quad_t ip6s_reassembled; /* total packets reassembled ok */
198 u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */
199 u_quad_t ip6s_ofragments; /* output fragments created */
200 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
201 u_quad_t ip6s_badoptions; /* error in option processing */
202 u_quad_t ip6s_noroute; /* packets discarded due to no route */
203 u_quad_t ip6s_badvers; /* ip6 version != 6 */
204 u_quad_t ip6s_rawout; /* total raw ip packets generated */
205 u_quad_t ip6s_badscope; /* scope error */
206 u_quad_t ip6s_notmember; /* don't join this multicast group */
207 u_quad_t ip6s_nxthist[256]; /* next header history */
208 u_quad_t ip6s_m1; /* one mbuf */
209 u_quad_t ip6s_m2m[32]; /* two or more mbuf */
210 u_quad_t ip6s_mext1; /* one ext mbuf */
211 u_quad_t ip6s_mext2m; /* two or more ext mbuf */
212 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */
213 u_quad_t ip6s_nogif; /* no match gif found */
214 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */
217 * statistics for improvement of the source address selection
219 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
221 /* number of times that address selection fails */
222 u_quad_t ip6s_sources_none;
223 /* number of times that an address on the outgoing I/F is chosen */
224 u_quad_t ip6s_sources_sameif[16];
225 /* number of times that an address on a non-outgoing I/F is chosen */
226 u_quad_t ip6s_sources_otherif[16];
228 * number of times that an address that has the same scope
229 * from the destination is chosen.
231 u_quad_t ip6s_sources_samescope[16];
233 * number of times that an address that has a different scope
234 * from the destination is chosen.
236 u_quad_t ip6s_sources_otherscope[16];
237 /* number of times that a deprecated address is chosen */
238 u_quad_t ip6s_sources_deprecated[16];
240 /* number of times that each rule of source selection is applied. */
241 u_quad_t ip6s_sources_rule[16];
245 #define IP6STAT_ADD(name, val) V_ip6stat.name += (val)
246 #define IP6STAT_SUB(name, val) V_ip6stat.name -= (val)
247 #define IP6STAT_INC(name) IP6STAT_ADD(name, 1)
248 #define IP6STAT_DEC(name) IP6STAT_SUB(name, 1)
253 * IPv6 onion peeling state.
254 * it will be initialized when we come into ip6_input().
255 * XXX do not make it a kitchen sink!
258 u_int32_t ip6a_flags;
259 #define IP6A_SWAP 0x01 /* swapped home/care-of on packet */
260 #define IP6A_HASEEN 0x02 /* HA was present */
261 #define IP6A_BRUID 0x04 /* BR Unique Identifier was present */
262 #define IP6A_RTALERTSEEN 0x08 /* rtalert present */
265 struct in6_addr ip6a_careof; /* care-of address of the peer */
266 struct in6_addr ip6a_home; /* home address of the peer */
267 u_int16_t ip6a_bruid; /* BR unique identifier */
270 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */
273 u_int16_t ip6a_rtalert; /* rtalert option value */
276 * decapsulation history will be here.
277 * with IPsec it may not be accurate.
283 /* flags passed to ip6_output as last parameter */
284 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */
285 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
286 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
288 #ifdef __NO_STRICT_ALIGNMENT
289 #define IP6_HDR_ALIGNED_P(ip) 1
291 #define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0)
294 #ifdef VIMAGE_GLOBALS
295 extern struct ip6stat ip6stat; /* statistics */
296 extern int ip6_defhlim; /* default hop limit */
297 extern int ip6_defmcasthlim; /* default multicast hop limit */
298 extern int ip6_forwarding; /* act as router? */
299 extern int ip6_gif_hlim; /* Hop limit for gif encap packet */
300 extern int ip6_use_deprecated; /* allow deprecated addr as source */
301 extern int ip6_rr_prune; /* router renumbering prefix
302 * walk list every 5 sec. */
303 extern int ip6_mcast_pmtu; /* enable pMTU discovery for multicast? */
304 extern int ip6_v6only;
305 extern struct socket *ip6_mrouter; /* multicast routing daemon */
306 extern int ip6_sendredirects; /* send IP redirects when forwarding? */
307 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */
308 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */
309 extern int ip6_accept_rtadv; /* Acts as a host not a router */
310 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */
311 extern int ip6_log_interval;
312 extern time_t ip6_log_time;
313 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */
314 extern int ip6_dad_count; /* DupAddrDetectionTransmits */
316 extern int ip6_auto_flowlabel;
317 extern int ip6_auto_linklocal;
319 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */
320 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses
321 in the source address selection */
324 extern int ip6stealth;
327 extern int ip6_use_defzone; /* whether to use the default scope zone
329 #endif /* VIMAGE_GLOBALS */
331 extern struct pfil_head inet6_pfil_hook; /* packet filter hooks */
333 extern struct pr_usrreqs rip6_usrreqs;
338 int icmp6_ctloutput __P((struct socket *, struct sockopt *sopt));
341 void ip6_init __P((void));
342 void ip6_input __P((struct mbuf *));
343 struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *));
344 void ip6_freepcbopts __P((struct ip6_pktopts *));
346 int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int));
347 char * ip6_get_prevhdr __P((struct mbuf *, int));
348 int ip6_nexthdr __P((struct mbuf *, int, int, int *));
349 int ip6_lasthdr __P((struct mbuf *, int, int, int *));
351 struct ip6aux *ip6_addaux __P((struct mbuf *));
352 struct ip6aux *ip6_findaux __P((struct mbuf *));
353 void ip6_delaux __P((struct mbuf *));
355 extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *,
358 int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *,
360 struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *,
361 struct mbuf **, int *);
362 void ip6_savecontrol __P((struct inpcb *, struct mbuf *, struct mbuf **));
363 void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *,
365 int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
367 void ip6_forward __P((struct mbuf *, int));
369 void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *));
370 int ip6_output __P((struct mbuf *, struct ip6_pktopts *,
373 struct ip6_moptions *, struct ifnet **,
375 int ip6_ctloutput __P((struct socket *, struct sockopt *));
376 int ip6_raw_ctloutput __P((struct socket *, struct sockopt *));
377 void ip6_initpktopts __P((struct ip6_pktopts *));
378 int ip6_setpktopts __P((struct mbuf *, struct ip6_pktopts *,
379 struct ip6_pktopts *, struct ucred *, int));
380 void ip6_clearpktopts __P((struct ip6_pktopts *, int));
381 struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int));
382 int ip6_optlen __P((struct inpcb *));
384 int route6_input __P((struct mbuf **, int *, int));
386 void frag6_init __P((void));
387 int frag6_input __P((struct mbuf **, int *, int));
388 void frag6_slowtimo __P((void));
389 void frag6_drain __P((void));
391 void rip6_init __P((void));
392 int rip6_input __P((struct mbuf **, int *, int));
393 void rip6_ctlinput __P((int, struct sockaddr *, void *));
394 int rip6_ctloutput __P((struct socket *, struct sockopt *));
395 int rip6_output __P((struct mbuf *, ...));
396 int rip6_usrreq __P((struct socket *,
397 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *));
399 int dest6_input __P((struct mbuf **, int *, int));
400 int none_input __P((struct mbuf **, int *, int));
402 struct in6_addr *in6_selectsrc __P((struct sockaddr_in6 *, struct ip6_pktopts *,
403 struct inpcb *inp, struct route_in6 *, struct ucred *cred,
404 struct ifnet **, int *));
405 int in6_selectroute __P((struct sockaddr_in6 *, struct ip6_pktopts *,
406 struct ip6_moptions *, struct route_in6 *, struct ifnet **,
408 u_int32_t ip6_randomid __P((void));
409 u_int32_t ip6_randomflowlabel __P((void));
412 #endif /* !_NETINET6_IP6_VAR_H_ */