2 /* $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $ */
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65 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93
68 #ifndef _NETINET6_IP6_VAR_H_
69 #define _NETINET6_IP6_VAR_H_
72 * IP6 reassembly queue structure. Each fragment
73 * being reassembled is attached to one of these structures.
78 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */
80 struct ip6asfrag *ip6q_down;
81 struct ip6asfrag *ip6q_up;
85 struct in6_addr ip6q_src, ip6q_dst;
86 struct ip6q *ip6q_next;
87 struct ip6q *ip6q_prev;
88 int ip6q_unfrglen; /* len of unfragmentable part */
99 /* must not override the above members during reassembling */
100 struct ip6asfrag *ip6af_down;
101 struct ip6asfrag *ip6af_up;
102 struct mbuf *ip6af_m;
103 int ip6af_offset; /* offset in ip6af_m to next header */
104 int ip6af_frglen; /* fragmentable part length */
105 int ip6af_off; /* fragment offset */
106 u_int16_t ip6af_mff; /* more fragment bit in frag off */
109 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
111 struct ip6_moptions {
112 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
113 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */
114 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */
115 LIST_HEAD(, in6_multi_mship) im6o_memberships;
119 * Control options for outgoing packets
122 /* Routing header related info */
123 struct ip6po_rhinfo {
124 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
125 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */
127 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr
128 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route
131 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */
132 int ip6po_hlim; /* Hoplimit for outgoing packets */
134 /* Outgoing IF/address information */
135 struct in6_pktinfo *ip6po_pktinfo;
137 struct sockaddr *ip6po_nexthop; /* Next-hop address */
139 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
141 /* Destination options header (before a routing header) */
142 struct ip6_dest *ip6po_dest1;
144 /* Routing header related info. */
145 struct ip6po_rhinfo ip6po_rhinfo;
147 /* Destination options header (after a routing header) */
148 struct ip6_dest *ip6po_dest2;
152 * Control options for incoming packets
156 u_quad_t ip6s_total; /* total packets received */
157 u_quad_t ip6s_tooshort; /* packet too short */
158 u_quad_t ip6s_toosmall; /* not enough data */
159 u_quad_t ip6s_fragments; /* fragments received */
160 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
161 u_quad_t ip6s_fragtimeout; /* fragments timed out */
162 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */
163 u_quad_t ip6s_forward; /* packets forwarded */
164 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */
165 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */
166 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/
167 u_quad_t ip6s_localout; /* total ip packets generated here */
168 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */
169 u_quad_t ip6s_reassembled; /* total packets reassembled ok */
170 u_quad_t ip6s_fragmented; /* datagrams sucessfully fragmented */
171 u_quad_t ip6s_ofragments; /* output fragments created */
172 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
173 u_quad_t ip6s_badoptions; /* error in option processing */
174 u_quad_t ip6s_noroute; /* packets discarded due to no route */
175 u_quad_t ip6s_badvers; /* ip6 version != 6 */
176 u_quad_t ip6s_rawout; /* total raw ip packets generated */
177 u_quad_t ip6s_badscope; /* scope error */
178 u_quad_t ip6s_notmember; /* don't join this multicast group */
179 u_quad_t ip6s_nxthist[256]; /* next header history */
180 u_quad_t ip6s_m1; /* one mbuf */
181 u_quad_t ip6s_m2m[32]; /* two or more mbuf */
182 u_quad_t ip6s_mext1; /* one ext mbuf */
183 u_quad_t ip6s_mext2m; /* two or more ext mbuf */
184 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */
185 u_quad_t ip6s_nogif; /* no match gif found */
186 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */
189 * statistics for improvement of the source address selection
191 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
193 /* number of times that address selection fails */
194 u_quad_t ip6s_sources_none;
195 /* number of times that an address on the outgoing I/F is chosen */
196 u_quad_t ip6s_sources_sameif[16];
197 /* number of times that an address on a non-outgoing I/F is chosen */
198 u_quad_t ip6s_sources_otherif[16];
200 * number of times that an address that has the same scope
201 * from the destination is chosen.
203 u_quad_t ip6s_sources_samescope[16];
205 * number of times that an address that has a different scope
206 * from the destination is chosen.
208 u_quad_t ip6s_sources_otherscope[16];
209 /* number of times that an deprecated address is chosen */
210 u_quad_t ip6s_sources_deprecated[16];
212 u_quad_t ip6s_forward_cachehit;
213 u_quad_t ip6s_forward_cachemiss;
218 * IPv6 onion peeling state.
219 * it will be initialized when we come into ip6_input().
220 * XXX do not make it a kitchen sink!
223 u_int32_t ip6a_flags;
224 #define IP6A_SWAP 0x01 /* swapped home/care-of on packet */
225 #define IP6A_HASEEN 0x02 /* HA was present */
226 #define IP6A_BRUID 0x04 /* BR Unique Identifier was present */
227 #define IP6A_RTALERTSEEN 0x08 /* rtalert present */
230 struct in6_addr ip6a_careof; /* care-of address of the peer */
231 struct in6_addr ip6a_home; /* home address of the peer */
232 u_int16_t ip6a_bruid; /* BR unique identifier */
235 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */
238 u_int16_t ip6a_rtalert; /* rtalert option value */
241 * decapsulation history will be here.
242 * with IPsec it may not be accurate.
248 /* flags passed to ip6_output as last parameter */
249 #define IPV6_DADOUTPUT 0x01 /* DAD */
250 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
251 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
253 extern struct ip6stat ip6stat; /* statistics */
254 extern u_int32_t ip6_id; /* fragment identifier */
255 extern int ip6_defhlim; /* default hop limit */
256 extern int ip6_defmcasthlim; /* default multicast hop limit */
257 extern int ip6_forwarding; /* act as router? */
258 extern int ip6_forward_srcrt; /* forward src-routed? */
259 extern int ip6_gif_hlim; /* Hop limit for gif encap packet */
260 extern int ip6_use_deprecated; /* allow deprecated addr as source */
261 extern int ip6_rr_prune; /* router renumbering prefix
262 * walk list every 5 sec. */
263 extern int ip6_v6only;
265 extern struct socket *ip6_mrouter; /* multicast routing daemon */
266 extern int ip6_sendredirects; /* send IP redirects when forwarding? */
267 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */
268 extern int ip6_sourcecheck; /* Verify source interface */
269 extern int ip6_sourcecheck_interval; /* Interval between log messages */
270 extern int ip6_accept_rtadv; /* Acts as a host not a router */
271 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */
272 extern int ip6_log_interval;
273 extern time_t ip6_log_time;
274 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */
275 extern int ip6_dad_count; /* DupAddrDetectionTransmits */
277 extern u_int32_t ip6_flow_seq;
278 extern int ip6_auto_flowlabel;
279 extern int ip6_auto_linklocal;
281 extern int ip6_anonportmin; /* minimum ephemeral port */
282 extern int ip6_anonportmax; /* maximum ephemeral port */
283 extern int ip6_lowportmin; /* minimum reserved port */
284 extern int ip6_lowportmax; /* maximum reserved port */
286 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */
288 extern struct pr_usrreqs rip6_usrreqs;
293 int icmp6_ctloutput __P((struct socket *, struct sockopt *sopt));
296 void ip6_init __P((void));
297 void ip6intr __P((void));
298 void ip6_input __P((struct mbuf *));
299 struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *));
300 void ip6_freepcbopts __P((struct ip6_pktopts *));
301 void ip6_freemoptions __P((struct ip6_moptions *));
302 int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int));
303 char * ip6_get_prevhdr __P((struct mbuf *, int));
304 int ip6_nexthdr __P((struct mbuf *, int, int, int *));
305 int ip6_lasthdr __P((struct mbuf *, int, int, int *));
307 struct mbuf *ip6_addaux __P((struct mbuf *));
308 struct mbuf *ip6_findaux __P((struct mbuf *));
309 void ip6_delaux __P((struct mbuf *));
311 int ip6_mforward __P((struct ip6_hdr *, struct ifnet *, struct mbuf *));
312 int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *,
314 void ip6_savecontrol __P((struct inpcb *, struct mbuf **, struct ip6_hdr *,
316 void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *,
318 int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
320 void ip6_forward __P((struct mbuf *, int));
322 void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *));
323 int ip6_output __P((struct mbuf *, struct ip6_pktopts *,
326 struct ip6_moptions *, struct ifnet **));
327 int ip6_ctloutput __P((struct socket *, struct sockopt *sopt));
328 void init_ip6pktopts __P((struct ip6_pktopts *));
329 int ip6_setpktoptions __P((struct mbuf *, struct ip6_pktopts *, int, int));
330 void ip6_clearpktopts __P((struct ip6_pktopts *, int, int));
331 struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int));
332 int ip6_optlen __P((struct inpcb *));
334 int route6_input __P((struct mbuf **, int *, int));
336 void frag6_init __P((void));
337 int frag6_input __P((struct mbuf **, int *, int));
338 void frag6_slowtimo __P((void));
339 void frag6_drain __P((void));
341 void rip6_init __P((void));
342 int rip6_input __P((struct mbuf **mp, int *offp, int proto));
343 void rip6_ctlinput __P((int, struct sockaddr *, void *));
344 int rip6_ctloutput __P((struct socket *so, struct sockopt *sopt));
345 int rip6_output __P((struct mbuf *, ...));
346 int rip6_usrreq __P((struct socket *,
347 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *));
349 int dest6_input __P((struct mbuf **, int *, int));
350 int none_input __P((struct mbuf **, int *, int));
353 #endif /* !_NETINET6_IP6_VAR_H_ */