1 //==========================================================================
3 // include/netinet6/ip6_var.h
5 //==========================================================================
6 //####BSDCOPYRIGHTBEGIN####
8 // -------------------------------------------
10 // Portions of this software may have been derived from OpenBSD,
11 // FreeBSD or other sources, and are covered by the appropriate
12 // copyright disclaimers included herein.
14 // Portions created by Red Hat are
15 // Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
17 // -------------------------------------------
19 //####BSDCOPYRIGHTEND####
20 //==========================================================================
22 /* $KAME: ip6_var.h,v 1.79 2001/12/27 15:37:41 jinmei Exp $ */
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85 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93
88 #ifndef _NETINET6_IP6_VAR_H_
89 #define _NETINET6_IP6_VAR_H_
92 * IP6 reassembly queue structure. Each fragment
93 * being reassembled is attached to one of these structures.
98 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */
100 struct ip6asfrag *ip6q_down;
101 struct ip6asfrag *ip6q_up;
102 u_int32_t ip6q_ident;
103 u_int8_t ip6q_arrive;
105 struct in6_addr ip6q_src, ip6q_dst;
106 struct ip6q *ip6q_next;
107 struct ip6q *ip6q_prev;
108 int ip6q_unfrglen; /* len of unfragmentable part */
115 u_int32_t ip6af_head;
119 /* must not override the above members during reassembling */
120 struct ip6asfrag *ip6af_down;
121 struct ip6asfrag *ip6af_up;
122 struct mbuf *ip6af_m;
123 int ip6af_offset; /* offset in ip6af_m to next header */
124 int ip6af_frglen; /* fragmentable part length */
125 int ip6af_off; /* fragment offset */
126 u_int16_t ip6af_mff; /* more fragment bit in frag off */
129 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
131 struct ip6_moptions {
132 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
133 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */
134 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */
135 LIST_HEAD(, in6_multi_mship) im6o_memberships;
139 * Control options for outgoing packets
142 /* Routing header related info */
143 struct ip6po_rhinfo {
144 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
145 #if defined(NEW_STRUCT_ROUTE) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__FreeBSD__)
146 struct route ip6po_rhi_route; /* Route to the 1st hop */
148 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */
151 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr
152 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route
154 /* Nexthop related info */
155 struct ip6po_nhinfo {
156 struct sockaddr *ip6po_nhi_nexthop;
157 #if defined(NEW_STRUCT_ROUTE) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__FreeBSD__)
158 struct route ip6po_nhi_route; /* Route to the nexthop */
160 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */
163 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop
164 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route
167 int ip6po_hlim; /* Hoplimit for outgoing packets */
169 /* Outgoing IF/address information */
170 struct in6_pktinfo *ip6po_pktinfo;
172 /* Next-hop address information */
173 struct ip6po_nhinfo ip6po_nhinfo;
175 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
177 /* Destination options header (before a routing header) */
178 struct ip6_dest *ip6po_dest1;
180 /* Routing header related info. */
181 struct ip6po_rhinfo ip6po_rhinfo;
183 /* Destination options header (after a routing header) */
184 struct ip6_dest *ip6po_dest2;
190 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation */
191 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */
192 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */
194 int needfree; /* members dynamically allocated */
198 * Control options for incoming packets
201 struct ip6_recvpktopts {
202 struct mbuf *head; /* mbuf chain of data passed to a user */
205 struct mbuf *timestamp; /* timestamp */
207 struct mbuf *hlim; /* received hop limit */
208 struct mbuf *pktinfo; /* packet information of rcv packet */
209 struct mbuf *hbh; /* HbH options header of rcv packet */
210 struct mbuf *dest; /* Dest opt header of rcv packet */
211 struct mbuf *rthdr; /* Routing header of rcv packet */
215 u_quad_t ip6s_total; /* total packets received */
216 u_quad_t ip6s_tooshort; /* packet too short */
217 u_quad_t ip6s_toosmall; /* not enough data */
218 u_quad_t ip6s_fragments; /* fragments received */
219 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
220 u_quad_t ip6s_fragtimeout; /* fragments timed out */
221 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */
222 u_quad_t ip6s_forward; /* packets forwarded */
223 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */
224 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */
225 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/
226 u_quad_t ip6s_localout; /* total ip packets generated here */
227 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */
228 u_quad_t ip6s_reassembled; /* total packets reassembled ok */
229 u_quad_t ip6s_fragmented; /* datagrams sucessfully fragmented */
230 u_quad_t ip6s_ofragments; /* output fragments created */
231 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
232 u_quad_t ip6s_badoptions; /* error in option processing */
233 u_quad_t ip6s_noroute; /* packets discarded due to no route */
234 u_quad_t ip6s_badvers; /* ip6 version != 6 */
235 u_quad_t ip6s_rawout; /* total raw ip packets generated */
236 u_quad_t ip6s_badscope; /* scope error */
237 u_quad_t ip6s_notmember; /* don't join this multicast group */
238 u_quad_t ip6s_nxthist[256]; /* next header history */
239 u_quad_t ip6s_m1; /* one mbuf */
240 u_quad_t ip6s_m2m[32]; /* two or more mbuf */
241 u_quad_t ip6s_mext1; /* one ext mbuf */
242 u_quad_t ip6s_mext2m; /* two or more ext mbuf */
243 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */
244 u_quad_t ip6s_nogif; /* no match gif found */
245 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */
248 * statistics for improvement of the source address selection
250 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
252 /* number of times that address selection fails */
253 u_quad_t ip6s_sources_none;
254 /* number of times that an address on the outgoing I/F is chosen */
255 u_quad_t ip6s_sources_sameif[16];
256 /* number of times that an address on a non-outgoing I/F is chosen */
257 u_quad_t ip6s_sources_otherif[16];
259 * number of times that an address that has the same scope
260 * from the destination is chosen.
262 u_quad_t ip6s_sources_samescope[16];
264 * number of times that an address that has a different scope
265 * from the destination is chosen.
267 u_quad_t ip6s_sources_otherscope[16];
268 /* number of times that an deprecated address is chosen */
269 u_quad_t ip6s_sources_deprecated[16];
271 u_quad_t ip6s_forward_cachehit;
272 u_quad_t ip6s_forward_cachemiss;
274 /* number of times that each rule of source selection is applied. */
275 u_quad_t ip6s_sources_rule[16];
280 * IPv6 onion peeling state.
281 * it will be initialized when we come into ip6_input().
282 * XXX do not make it a kitchen sink!
285 u_int32_t ip6a_flags;
286 #define IP6A_SWAP 0x01 /* swapped home/care-of on packet */
287 #define IP6A_HASEEN 0x02 /* HA was present */
288 #define IP6A_BRUID 0x04 /* BR Unique Identifier was present */
289 #define IP6A_RTALERTSEEN 0x08 /* rtalert present */
290 #define IP6A_ROUTEOPTIMIZED 0x10 /* route optimized packet */
293 struct in6_addr ip6a_careof; /* care-of address of the peer */
294 struct in6_addr ip6a_home; /* home address of the peer */
297 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */
300 u_int16_t ip6a_rtalert; /* rtalert option value */
303 * decapsulation history will be here.
304 * with IPsec it may not be accurate.
310 /* flags passed to ip6_output as last parameter */
311 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */
312 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
313 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
315 extern struct ip6stat ip6stat; /* statistics */
316 extern u_int32_t ip6_id; /* fragment identifier */
317 extern int ip6_defhlim; /* default hop limit */
318 extern int ip6_defmcasthlim; /* default multicast hop limit */
319 extern int ip6_forwarding; /* act as router? */
320 extern int ip6_forward_srcrt; /* forward src-routed? */
321 extern int ip6_use_deprecated; /* allow deprecated addr as source */
322 extern int ip6_rr_prune; /* router renumbering prefix
323 * walk list every 5 sec. */
324 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
325 #define ip6_mapped_addr_on (!ip6_v6only)
327 #if defined(__OpenBSD__) || (defined(__FreeBSD__) && __FreeBSD__ == 2) || (defined(__bsdi__) && _BSDI_VERSION < 199802)
328 extern const int ip6_v6only;
330 extern int ip6_v6only;
333 extern struct socket *ip6_mrouter; /* multicast routing daemon */
334 extern int ip6_sendredirects; /* send IP redirects when forwarding? */
335 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */
336 extern int ip6_sourcecheck; /* Verify source interface */
337 extern int ip6_sourcecheck_interval; /* Interval between log messages */
338 extern int ip6_accept_rtadv; /* Acts as a host not a router */
339 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */
340 extern int ip6_log_interval;
341 extern time_t ip6_log_time;
342 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */
343 extern int ip6_dad_count; /* DupAddrDetectionTransmits */
345 extern u_int32_t ip6_flow_seq;
346 extern int ip6_auto_flowlabel;
347 extern int ip6_auto_linklocal;
349 extern int ip6_anonportmin; /* minimum ephemeral port */
350 extern int ip6_anonportmax; /* maximum ephemeral port */
351 extern int ip6_lowportmin; /* minimum reserved port */
352 extern int ip6_lowportmax; /* maximum reserved port */
354 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */
355 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses
356 in the source address selection */
358 extern int ip6_use_defzone; /* whether to use the default scope zone
361 #if !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
364 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
365 extern struct pr_usrreqs rip6_usrreqs;
369 #if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__OpenBSD__) || (defined(__bsdi__) && _BSDI_VERSION >= 199802) /* fbsd3 || HAVE_NRL_INPCB */
373 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
374 int icmp6_ctloutput __P((struct socket *, struct sockopt *sopt));
376 int icmp6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
380 void ip6_init __P((void));
381 void ip6intr __P((void));
382 void ip6_input __P((struct mbuf *));
383 struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *));
384 void ip6_freepcbopts __P((struct ip6_pktopts *));
385 void ip6_freemoptions __P((struct ip6_moptions *));
386 int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int));
387 char * ip6_get_prevhdr __P((struct mbuf *, int));
388 int ip6_nexthdr __P((struct mbuf *, int, int, int *));
389 int ip6_lasthdr __P((struct mbuf *, int, int, int *));
391 struct mbuf *ip6_addaux __P((struct mbuf *));
392 struct mbuf *ip6_findaux __P((struct mbuf *));
393 void ip6_delaux __P((struct mbuf *));
395 int ip6_mforward __P((struct ip6_hdr *, struct ifnet *, struct mbuf *));
396 int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *,
398 #if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__OpenBSD__) || (defined(__bsdi__) && _BSDI_VERSION >= 199802) /* fbsd3 || HAVE_NRL_INPCB */
399 void ip6_savecontrol __P((struct inpcb *, struct ip6_hdr *, struct mbuf *,
400 struct ip6_recvpktopts *,
401 struct ip6_recvpktopts **));
402 void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *,
405 void ip6_savecontrol __P((struct in6pcb *, struct ip6_hdr *, struct mbuf *,
406 struct ip6_recvpktopts *,
407 struct ip6_recvpktopts **));
408 void ip6_notify_pmtu __P((struct in6pcb *, struct sockaddr_in6 *,
411 void ip6_update_recvpcbopt __P((struct ip6_recvpktopts *,
412 struct ip6_recvpktopts *));
413 void ip6_reset_rcvopt __P((struct ip6_recvpktopts *, int));
414 int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
416 void ip6_forward __P((struct mbuf *, int));
418 void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *));
419 #if defined(NEW_STRUCT_ROUTE) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__FreeBSD__)
420 int ip6_output __P((struct mbuf *, struct ip6_pktopts *,
423 struct ip6_moptions *, struct ifnet **));
425 int ip6_output __P((struct mbuf *, struct ip6_pktopts *,
428 struct ip6_moptions *, struct ifnet **));
430 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
431 int ip6_ctloutput __P((struct socket *, struct sockopt *sopt));
433 int ip6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
435 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
436 int ip6_raw_ctloutput __P((struct socket *, struct sockopt *sopt));
438 int ip6_raw_ctloutput __P((int, struct socket *, int, int,
441 void init_ip6pktopts __P((struct ip6_pktopts *));
442 int ip6_setpktoptions __P((struct mbuf *, struct ip6_pktopts *, struct ip6_pktopts *, int, int));
443 void ip6_clearpktopts __P((struct ip6_pktopts *, int));
444 struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int));
445 #if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__OpenBSD__) || (defined(__bsdi__) && _BSDI_VERSION >= 199802) /* fbsd3 || HAVE_NRL_INPCB */
446 int ip6_optlen __P((struct inpcb *));
448 int ip6_optlen __P((struct in6pcb *));
451 int route6_input __P((struct mbuf **, int *, int));
453 void frag6_init __P((void));
454 int frag6_input __P((struct mbuf **, int *, int));
455 void frag6_slowtimo __P((void));
456 void frag6_drain __P((void));
458 void rip6_init __P((void));
459 int rip6_input __P((struct mbuf **mp, int *offp, int proto));
460 void rip6_ctlinput __P((int, struct sockaddr *, void *));
461 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
462 int rip6_ctloutput __P((struct socket *so, struct sockopt *sopt));
464 int rip6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
466 #if (defined(__FreeBSD__) && __FreeBSD__ >= 4)
467 int rip6_output __P((struct mbuf *, struct socket *,
468 struct sockaddr_in6 *, struct mbuf *));
470 int rip6_output __P((struct mbuf *, ...));
471 #endif /* (defined(__FreeBSD__) && __FreeBSD__ >= 4) */
472 int rip6_usrreq __P((struct socket *,
473 int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *));
475 int dest6_input __P((struct mbuf **, int *, int));
476 int none_input __P((struct mbuf **, int *, int));
479 #endif /* !_NETINET6_IP6_VAR_H_ */