1 /* $FreeBSD: src/sys/netinet6/ip6_var.h,v 1.2.2.4 2003/01/23 21:06:47 sam Exp $ */
2 /* $DragonFly: src/sys/netinet6/ip6_var.h,v 1.9 2004/08/25 01:53:36 dillon Exp $ */
3 /* $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $ */
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66 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93
69 #ifndef _NETINET6_IP6_VAR_H_
70 #define _NETINET6_IP6_VAR_H_
73 * IP6 reassembly queue structure. Each fragment
74 * being reassembled is attached to one of these structures.
79 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */
81 struct ip6asfrag *ip6q_down;
82 struct ip6asfrag *ip6q_up;
86 struct in6_addr ip6q_src, ip6q_dst;
87 struct ip6q *ip6q_next;
88 struct ip6q *ip6q_prev;
89 int ip6q_unfrglen; /* len of unfragmentable part */
100 /* must not override the above members during reassembling */
101 struct ip6asfrag *ip6af_down;
102 struct ip6asfrag *ip6af_up;
103 struct mbuf *ip6af_m;
104 int ip6af_offset; /* offset in ip6af_m to next header */
105 int ip6af_frglen; /* fragmentable part length */
106 int ip6af_off; /* fragment offset */
107 u_int16_t ip6af_mff; /* more fragment bit in frag off */
110 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
112 struct ip6_moptions {
113 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
114 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */
115 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */
116 LIST_HEAD(, in6_multi_mship) im6o_memberships;
120 * Control options for outgoing packets
123 /* Routing header related info */
124 struct ip6po_rhinfo {
125 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
126 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */
128 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr
129 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route
132 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */
133 int ip6po_hlim; /* Hoplimit for outgoing packets */
135 /* Outgoing IF/address information */
136 struct in6_pktinfo *ip6po_pktinfo;
138 struct sockaddr *ip6po_nexthop; /* Next-hop address */
140 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
142 /* Destination options header (before a routing header) */
143 struct ip6_dest *ip6po_dest1;
145 /* Routing header related info. */
146 struct ip6po_rhinfo ip6po_rhinfo;
148 /* Destination options header (after a routing header) */
149 struct ip6_dest *ip6po_dest2;
153 * Control options for incoming packets
157 u_quad_t ip6s_total; /* total packets received */
158 u_quad_t ip6s_tooshort; /* packet too short */
159 u_quad_t ip6s_toosmall; /* not enough data */
160 u_quad_t ip6s_fragments; /* fragments received */
161 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
162 u_quad_t ip6s_fragtimeout; /* fragments timed out */
163 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */
164 u_quad_t ip6s_forward; /* packets forwarded */
165 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */
166 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */
167 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/
168 u_quad_t ip6s_localout; /* total ip packets generated here */
169 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */
170 u_quad_t ip6s_reassembled; /* total packets reassembled ok */
171 u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */
172 u_quad_t ip6s_ofragments; /* output fragments created */
173 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
174 u_quad_t ip6s_badoptions; /* error in option processing */
175 u_quad_t ip6s_noroute; /* packets discarded due to no route */
176 u_quad_t ip6s_badvers; /* ip6 version != 6 */
177 u_quad_t ip6s_rawout; /* total raw ip packets generated */
178 u_quad_t ip6s_badscope; /* scope error */
179 u_quad_t ip6s_notmember; /* don't join this multicast group */
180 u_quad_t ip6s_nxthist[256]; /* next header history */
181 u_quad_t ip6s_m1; /* one mbuf */
182 u_quad_t ip6s_m2m[32]; /* two or more mbuf */
183 u_quad_t ip6s_mext1; /* one ext mbuf */
184 u_quad_t ip6s_mext2m; /* two or more ext mbuf */
185 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */
186 u_quad_t ip6s_nogif; /* no match gif found */
187 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */
190 * statistics for improvement of the source address selection
192 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
194 /* number of times that address selection fails */
195 u_quad_t ip6s_sources_none;
196 /* number of times that an address on the outgoing I/F is chosen */
197 u_quad_t ip6s_sources_sameif[16];
198 /* number of times that an address on a non-outgoing I/F is chosen */
199 u_quad_t ip6s_sources_otherif[16];
201 * number of times that an address that has the same scope
202 * from the destination is chosen.
204 u_quad_t ip6s_sources_samescope[16];
206 * number of times that an address that has a different scope
207 * from the destination is chosen.
209 u_quad_t ip6s_sources_otherscope[16];
210 /* number of times that an deprecated address is chosen */
211 u_quad_t ip6s_sources_deprecated[16];
213 u_quad_t ip6s_forward_cachehit;
214 u_quad_t ip6s_forward_cachemiss;
219 * IPv6 onion peeling state.
220 * it will be initialized when we come into ip6_input().
221 * XXX do not make it a kitchen sink!
224 u_int32_t ip6a_flags;
225 #define IP6A_SWAP 0x01 /* swapped home/care-of on packet */
226 #define IP6A_HASEEN 0x02 /* HA was present */
227 #define IP6A_BRUID 0x04 /* BR Unique Identifier was present */
228 #define IP6A_RTALERTSEEN 0x08 /* rtalert present */
231 struct in6_addr ip6a_careof; /* care-of address of the peer */
232 struct in6_addr ip6a_home; /* home address of the peer */
233 u_int16_t ip6a_bruid; /* BR unique identifier */
236 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */
239 u_int16_t ip6a_rtalert; /* rtalert option value */
242 * decapsulation history will be here.
243 * with IPsec it may not be accurate.
249 /* flags passed to ip6_output as last parameter */
250 #define IPV6_DADOUTPUT 0x01 /* DAD */
251 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
252 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
254 extern struct ip6stat ip6stat; /* statistics */
255 extern u_int32_t ip6_id; /* fragment identifier */
256 extern int ip6_defhlim; /* default hop limit */
257 extern int ip6_defmcasthlim; /* default multicast hop limit */
258 extern int ip6_forwarding; /* act as router? */
259 extern int ip6_forward_srcrt; /* forward src-routed? */
260 extern int ip6_gif_hlim; /* Hop limit for gif encap packet */
261 extern int ip6_use_deprecated; /* allow deprecated addr as source */
262 extern int ip6_rr_prune; /* router renumbering prefix
263 * walk list every 5 sec. */
264 extern int ip6_v6only;
266 extern struct socket *ip6_mrouter; /* multicast routing daemon */
267 extern int ip6_sendredirects; /* send IP redirects when forwarding? */
268 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */
269 extern int ip6_sourcecheck; /* Verify source interface */
270 extern int ip6_sourcecheck_interval; /* Interval between log messages */
271 extern int ip6_accept_rtadv; /* Acts as a host not a router */
272 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */
273 extern int ip6_log_interval;
274 extern time_t ip6_log_time;
275 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */
276 extern int ip6_dad_count; /* DupAddrDetectionTransmits */
278 extern u_int32_t ip6_flow_seq;
279 extern int ip6_auto_flowlabel;
280 extern int ip6_auto_linklocal;
282 extern int ip6_anonportmin; /* minimum ephemeral port */
283 extern int ip6_anonportmax; /* maximum ephemeral port */
284 extern int ip6_lowportmin; /* minimum reserved port */
285 extern int ip6_lowportmax; /* maximum reserved port */
287 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */
289 extern struct pfil_head inet6_pfil_hook;
291 extern struct pr_usrreqs rip6_usrreqs;
296 int icmp6_ctloutput (struct socket *, struct sockopt *sopt);
299 void ip6_init (void);
302 struct in6_ifaddr *ip6_getdstifaddr (struct mbuf *);
303 void ip6_freepcbopts (struct ip6_pktopts *);
304 void ip6_freemoptions (struct ip6_moptions *);
305 int ip6_unknown_opt (u_int8_t *, struct mbuf *, int);
306 char * ip6_get_prevhdr (struct mbuf *, int);
307 int ip6_nexthdr (struct mbuf *, int, int, int *);
308 int ip6_lasthdr (struct mbuf *, int, int, int *);
310 struct ip6aux *ip6_addaux (struct mbuf *);
311 struct ip6aux *ip6_findaux (struct mbuf *);
312 void ip6_delaux (struct mbuf *);
314 int ip6_mforward (struct ip6_hdr *, struct ifnet *, struct mbuf *);
315 int ip6_process_hopopts (struct mbuf *, u_int8_t *, int, u_int32_t *,
317 void ip6_savecontrol (struct inpcb *, struct mbuf **, struct ip6_hdr *,
319 void ip6_notify_pmtu (struct inpcb *, struct sockaddr_in6 *,
321 int ip6_sysctl (int *, u_int, void *, size_t *, void *, size_t);
323 void ip6_forward (struct mbuf *, int);
325 void ip6_mloopback (struct ifnet *, struct mbuf *, struct sockaddr_in6 *);
326 int ip6_output (struct mbuf *, struct ip6_pktopts *,
329 struct ip6_moptions *, struct ifnet **,
331 int ip6_ctloutput (struct socket *, struct sockopt *sopt);
332 void init_ip6pktopts (struct ip6_pktopts *);
333 int ip6_setpktoptions (struct mbuf *, struct ip6_pktopts *, int, int);
334 void ip6_clearpktopts (struct ip6_pktopts *, int, int);
335 struct ip6_pktopts *ip6_copypktopts (struct ip6_pktopts *, int);
336 int ip6_optlen (struct inpcb *);
338 int route6_input (struct mbuf **, int *, int);
340 void frag6_init (void);
341 int frag6_input (struct mbuf **, int *, int);
342 void frag6_slowtimo (void);
343 void frag6_drain (void);
345 void rip6_init (void);
346 int rip6_input (struct mbuf **mp, int *offp, int proto);
347 void rip6_ctlinput (int, struct sockaddr *, void *);
348 int rip6_ctloutput (struct socket *so, struct sockopt *sopt);
349 int rip6_output (struct mbuf *, struct socket *, ...);
350 int rip6_usrreq (struct socket *,
351 int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *);
353 int dest6_input (struct mbuf **, int *, int);
354 int none_input (struct mbuf **, int *, int);
357 #endif /* !_NETINET6_IP6_VAR_H_ */