2 /* $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $ */
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61 * @(#)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.
74 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */
76 struct ip6asfrag *ip6q_down;
77 struct ip6asfrag *ip6q_up;
81 struct in6_addr ip6q_src, ip6q_dst;
82 struct ip6q *ip6q_next;
83 struct ip6q *ip6q_prev;
84 int ip6q_unfrglen; /* len of unfragmentable part */
88 int ip6q_nfrag; /* # of fragments */
96 /* must not override the above members during reassembling */
97 struct ip6asfrag *ip6af_down;
98 struct ip6asfrag *ip6af_up;
100 int ip6af_offset; /* offset in ip6af_m to next header */
101 int ip6af_frglen; /* fragmentable part length */
102 int ip6af_off; /* fragment offset */
103 u_int16_t ip6af_mff; /* more fragment bit in frag off */
106 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
108 struct ip6_moptions {
109 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
110 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */
111 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */
112 LIST_HEAD(, in6_multi_mship) im6o_memberships;
116 * Control options for outgoing packets
119 /* Routing header related info */
120 struct ip6po_rhinfo {
121 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
122 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */
124 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr
125 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route
127 /* Nexthop related info */
128 struct ip6po_nhinfo {
129 struct sockaddr *ip6po_nhi_nexthop;
130 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */
132 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop
133 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route
136 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */
137 int ip6po_hlim; /* Hoplimit for outgoing packets */
139 /* Outgoing IF/address information */
140 struct in6_pktinfo *ip6po_pktinfo;
142 /* Next-hop address information */
143 struct ip6po_nhinfo ip6po_nhinfo;
145 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
147 /* Destination options header (before a routing header) */
148 struct ip6_dest *ip6po_dest1;
150 /* Routing header related info. */
151 struct ip6po_rhinfo ip6po_rhinfo;
153 /* Destination options header (after a routing header) */
154 struct ip6_dest *ip6po_dest2;
156 int ip6po_tclass; /* traffic class */
158 int ip6po_minmtu; /* fragment vs PMTU discovery policy */
159 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/
160 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */
161 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */
163 int ip6po_prefer_tempaddr; /* whether temporary addresses are
164 preferred as source address */
165 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */
166 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */
167 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */
170 #if 0 /* parameters in this block is obsolete. do not reuse the values. */
171 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */
172 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */
174 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */
175 #define IP6PO_USECOA 0x08 /* use care of address */
179 * Control options for incoming packets
183 u_quad_t ip6s_total; /* total packets received */
184 u_quad_t ip6s_tooshort; /* packet too short */
185 u_quad_t ip6s_toosmall; /* not enough data */
186 u_quad_t ip6s_fragments; /* fragments received */
187 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
188 u_quad_t ip6s_fragtimeout; /* fragments timed out */
189 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */
190 u_quad_t ip6s_forward; /* packets forwarded */
191 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */
192 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */
193 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/
194 u_quad_t ip6s_localout; /* total ip packets generated here */
195 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */
196 u_quad_t ip6s_reassembled; /* total packets reassembled ok */
197 u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */
198 u_quad_t ip6s_ofragments; /* output fragments created */
199 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
200 u_quad_t ip6s_badoptions; /* error in option processing */
201 u_quad_t ip6s_noroute; /* packets discarded due to no route */
202 u_quad_t ip6s_badvers; /* ip6 version != 6 */
203 u_quad_t ip6s_rawout; /* total raw ip packets generated */
204 u_quad_t ip6s_badscope; /* scope error */
205 u_quad_t ip6s_notmember; /* don't join this multicast group */
206 u_quad_t ip6s_nxthist[256]; /* next header history */
207 u_quad_t ip6s_m1; /* one mbuf */
208 u_quad_t ip6s_m2m[32]; /* two or more mbuf */
209 u_quad_t ip6s_mext1; /* one ext mbuf */
210 u_quad_t ip6s_mext2m; /* two or more ext mbuf */
211 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */
212 u_quad_t ip6s_nogif; /* no match gif found */
213 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */
216 * statistics for improvement of the source address selection
218 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
220 /* number of times that address selection fails */
221 u_quad_t ip6s_sources_none;
222 /* number of times that an address on the outgoing I/F is chosen */
223 u_quad_t ip6s_sources_sameif[16];
224 /* number of times that an address on a non-outgoing I/F is chosen */
225 u_quad_t ip6s_sources_otherif[16];
227 * number of times that an address that has the same scope
228 * from the destination is chosen.
230 u_quad_t ip6s_sources_samescope[16];
232 * number of times that an address that has a different scope
233 * from the destination is chosen.
235 u_quad_t ip6s_sources_otherscope[16];
236 /* number of times that a deprecated address is chosen */
237 u_quad_t ip6s_sources_deprecated[16];
239 u_quad_t ip6s_forward_cachehit;
240 u_quad_t ip6s_forward_cachemiss;
242 /* number of times that each rule of source selection is applied. */
243 u_quad_t ip6s_sources_rule[16];
248 * IPv6 onion peeling state.
249 * it will be initialized when we come into ip6_input().
250 * XXX do not make it a kitchen sink!
253 u_int32_t ip6a_flags;
254 #define IP6A_SWAP 0x01 /* swapped home/care-of on packet */
255 #define IP6A_HASEEN 0x02 /* HA was present */
256 #define IP6A_BRUID 0x04 /* BR Unique Identifier was present */
257 #define IP6A_RTALERTSEEN 0x08 /* rtalert present */
260 struct in6_addr ip6a_careof; /* care-of address of the peer */
261 struct in6_addr ip6a_home; /* home address of the peer */
262 u_int16_t ip6a_bruid; /* BR unique identifier */
265 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */
268 u_int16_t ip6a_rtalert; /* rtalert option value */
271 * decapsulation history will be here.
272 * with IPsec it may not be accurate.
278 /* flags passed to ip6_output as last parameter */
279 #define IPV6_DADOUTPUT 0x01 /* DAD */
280 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
281 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
283 #ifdef __NO_STRICT_ALIGNMENT
284 #define IP6_HDR_ALIGNED_P(ip) 1
286 #define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0)
289 extern struct ip6stat ip6stat; /* statistics */
290 extern int ip6_defhlim; /* default hop limit */
291 extern int ip6_defmcasthlim; /* default multicast hop limit */
292 extern int ip6_forwarding; /* act as router? */
293 extern int ip6_forward_srcrt; /* forward src-routed? */
294 extern int ip6_gif_hlim; /* Hop limit for gif encap packet */
295 extern int ip6_use_deprecated; /* allow deprecated addr as source */
296 extern int ip6_rr_prune; /* router renumbering prefix
297 * walk list every 5 sec. */
298 extern int ip6_v6only;
300 extern struct socket *ip6_mrouter; /* multicast routing daemon */
301 extern int ip6_sendredirects; /* send IP redirects when forwarding? */
302 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */
303 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */
304 extern int ip6_sourcecheck; /* Verify source interface */
305 extern int ip6_sourcecheck_interval; /* Interval between log messages */
306 extern int ip6_accept_rtadv; /* Acts as a host not a router */
307 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */
308 extern int ip6_log_interval;
309 extern time_t ip6_log_time;
310 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */
311 extern int ip6_dad_count; /* DupAddrDetectionTransmits */
313 extern int ip6_auto_flowlabel;
314 extern int ip6_auto_linklocal;
316 extern int ip6_anonportmin; /* minimum ephemeral port */
317 extern int ip6_anonportmax; /* maximum ephemeral port */
318 extern int ip6_lowportmin; /* minimum reserved port */
319 extern int ip6_lowportmax; /* maximum reserved port */
321 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */
322 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses
323 in the source address selection */
325 extern int ip6_use_defzone; /* whether to use the default scope zone
328 extern struct pfil_head inet6_pfil_hook; /* packet filter hooks */
330 extern int ip6stealth;
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 *));
345 void ip6_freemoptions __P((struct ip6_moptions *));
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 int ip6_mforward __P((struct ip6_hdr *, struct ifnet *, struct mbuf *));
356 int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *,
358 void ip6_savecontrol __P((struct inpcb *, struct mbuf *, struct mbuf **));
359 void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *,
361 int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
363 void ip6_forward __P((struct mbuf *, int));
365 void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *));
366 int ip6_output __P((struct mbuf *, struct ip6_pktopts *,
369 struct ip6_moptions *, struct ifnet **,
371 int ip6_ctloutput __P((struct socket *, struct sockopt *));
372 int ip6_raw_ctloutput __P((struct socket *, struct sockopt *));
373 void ip6_initpktopts __P((struct ip6_pktopts *));
374 int ip6_setpktopts __P((struct mbuf *, struct ip6_pktopts *,
375 struct ip6_pktopts *, int, int));
376 void ip6_clearpktopts __P((struct ip6_pktopts *, int));
377 struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int));
378 int ip6_optlen __P((struct inpcb *));
380 int route6_input __P((struct mbuf **, int *, int));
382 void frag6_init __P((void));
383 int frag6_input __P((struct mbuf **, int *, int));
384 void frag6_slowtimo __P((void));
385 void frag6_drain __P((void));
387 void rip6_init __P((void));
388 int rip6_input __P((struct mbuf **, int *, int));
389 void rip6_ctlinput __P((int, struct sockaddr *, void *));
390 int rip6_ctloutput __P((struct socket *, struct sockopt *));
391 int rip6_output __P((struct mbuf *, ...));
392 int rip6_usrreq __P((struct socket *,
393 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *));
395 int dest6_input __P((struct mbuf **, int *, int));
396 int none_input __P((struct mbuf **, int *, int));
398 struct in6_addr *in6_selectsrc __P((struct sockaddr_in6 *,
399 struct ip6_pktopts *, struct ip6_moptions *, struct route_in6 *,
400 struct in6_addr *, struct ifnet **, int *));
401 int in6_selectroute __P((struct sockaddr_in6 *, struct ip6_pktopts *,
402 struct ip6_moptions *, struct route_in6 *, struct ifnet **,
403 struct rtentry **, int));
404 u_int32_t ip6_randomid __P((void));
405 u_int32_t ip6_randomflowlabel __P((void));
408 #endif /* !_NETINET6_IP6_VAR_H_ */