1 /* $OpenBSD: ip6_var.h,v 1.31 2007/06/01 00:52:38 henning Exp $ */
2 /* $KAME: ip6_var.h,v 1.33 2000/06/11 14:59:20 jinmei Exp $ */
3
4 /*
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 /*
34 * Copyright (c) 1982, 1986, 1993
35 * The Regents of the University of California. All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 * 3. Neither the name of the University nor the names of its contributors
46 * may be used to endorse or promote products derived from this software
47 * without specific prior written permission.
48 *
49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59 * SUCH DAMAGE.
60 *
61 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93
62 */
63
64 #ifndef _NETINET6_IP6_VAR_H_
65 #define _NETINET6_IP6_VAR_H_
66
67 /*
68 * IP6 reassembly queue structure. Each fragment
69 * being reassembled is attached to one of these structures.
70 */
71 struct ip6q {
72 u_int32_t ip6q_head;
73 u_int16_t ip6q_len;
74 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */
75 u_int8_t ip6q_hlim;
76 struct ip6asfrag *ip6q_down;
77 struct ip6asfrag *ip6q_up;
78 u_int32_t ip6q_ident;
79 u_int8_t ip6q_arrive;
80 u_int8_t ip6q_ttl;
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 */
85 #ifdef notyet
86 u_char *ip6q_nxtp;
87 #endif
88 int ip6q_nfrag; /* # of fragments */
89 };
90
91 struct ip6asfrag {
92 u_int32_t ip6af_head;
93 u_int16_t ip6af_len;
94 u_int8_t ip6af_nxt;
95 u_int8_t ip6af_hlim;
96 /* must not override the above members during reassembling */
97 struct ip6asfrag *ip6af_down;
98 struct ip6asfrag *ip6af_up;
99 struct mbuf *ip6af_m;
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 */
104 };
105
106 #define IP6_REASS_MBUF(ip6af) ((ip6af)->ip6af_m)
107
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;
113 };
114
115 /*
116 * Control options for outgoing packets
117 */
118
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 */
123 };
124 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr
125 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route
126
127 /* Nexthop related info */
128 struct ip6po_nhinfo {
129 struct sockaddr *ip6po_nhi_nexthop;
130 struct route_in6 ip6po_nhi_route;
131 };
132 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop
133 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route
134
135 struct ip6_pktopts {
136 /* Hoplimit for outgoing packets */
137 int ip6po_hlim;
138
139 /* Outgoing IF/address information */
140 struct in6_pktinfo *ip6po_pktinfo;
141
142 /* Next-hop address information */
143 struct ip6po_nhinfo ip6po_nhinfo;
144
145 /* Hop-by-Hop options header */
146 struct ip6_hbh *ip6po_hbh;
147
148 /* Destination options header (before a routing header) */
149 struct ip6_dest *ip6po_dest1;
150
151 /* Routing header related info. */
152 struct ip6po_rhinfo ip6po_rhinfo;
153
154 /* Destination options header (after a routing header) */
155 struct ip6_dest *ip6po_dest2;
156
157 /* traffic class */
158 int ip6po_tclass;
159
160 /* fragment vs PMTU discovery policy */
161 int ip6po_minmtu;
162 #define IP6PO_MINMTU_MCASTONLY -1 /* default: send at min MTU for multicast */
163 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */
164 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */
165
166 int ip6po_flags;
167 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */
168 };
169
170 struct ip6stat {
171 u_int64_t ip6s_total; /* total packets received */
172 u_int64_t ip6s_tooshort; /* packet too short */
173 u_int64_t ip6s_toosmall; /* not enough data */
174 u_int64_t ip6s_fragments; /* fragments received */
175 u_int64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
176 u_int64_t ip6s_fragtimeout; /* fragments timed out */
177 u_int64_t ip6s_fragoverflow; /* fragments that exceeded limit */
178 u_int64_t ip6s_forward; /* packets forwarded */
179 u_int64_t ip6s_cantforward; /* packets rcvd for unreachable dest */
180 u_int64_t ip6s_redirectsent; /* packets forwarded on same net */
181 u_int64_t ip6s_delivered; /* datagrams delivered to upper level*/
182 u_int64_t ip6s_localout; /* total ip packets generated here */
183 u_int64_t ip6s_odropped; /* lost packets due to nobufs, etc. */
184 u_int64_t ip6s_reassembled; /* total packets reassembled ok */
185 u_int64_t ip6s_fragmented; /* datagrams successfully fragmented */
186 u_int64_t ip6s_ofragments; /* output fragments created */
187 u_int64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
188 u_int64_t ip6s_badoptions; /* error in option processing */
189 u_int64_t ip6s_noroute; /* packets discarded due to no route */
190 u_int64_t ip6s_badvers; /* ip6 version != 6 */
191 u_int64_t ip6s_rawout; /* total raw ip packets generated */
192 u_int64_t ip6s_badscope; /* scope error */
193 u_int64_t ip6s_notmember; /* don't join this multicast group */
194 u_int64_t ip6s_nxthist[256]; /* next header history */
195 u_int64_t ip6s_m1; /* one mbuf */
196 u_int64_t ip6s_m2m[32]; /* two or more mbuf */
197 u_int64_t ip6s_mext1; /* one ext mbuf */
198 u_int64_t ip6s_mext2m; /* two or more ext mbuf */
199 u_int64_t ip6s_exthdrtoolong; /* ext hdr are not continuous */
200 u_int64_t ip6s_nogif; /* no match gif found */
201 u_int64_t ip6s_toomanyhdr; /* discarded due to too many headers */
202
203 /*
204 * statistics for improvement of the source address selection
205 * algorithm:
206 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
207 */
208 /* number of times that address selection fails */
209 u_int64_t ip6s_sources_none;
210 /* number of times that an address on the outgoing I/F is chosen */
211 u_int64_t ip6s_sources_sameif[16];
212 /* number of times that an address on a non-outgoing I/F is chosen */
213 u_int64_t ip6s_sources_otherif[16];
214 /*
215 * number of times that an address that has the same scope
216 * from the destination is chosen.
217 */
218 u_int64_t ip6s_sources_samescope[16];
219 /*
220 * number of times that an address that has a different scope
221 * from the destination is chosen.
222 */
223 u_int64_t ip6s_sources_otherscope[16];
224 /* number of times that an deprecated address is chosen */
225 u_int64_t ip6s_sources_deprecated[16];
226
227 u_int64_t ip6s_forward_cachehit;
228 u_int64_t ip6s_forward_cachemiss;
229 };
230
231 #ifdef _KERNEL
232 /* flags passed to ip6_output as last parameter */
233 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */
234 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
235 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
236
237 extern struct ip6stat ip6stat; /* statistics */
238 extern int ip6_defhlim; /* default hop limit */
239 extern int ip6_defmcasthlim; /* default multicast hop limit */
240 extern int ip6_forwarding; /* act as router? */
241 extern int ip6_mforwarding; /* act as multicast router? */
242 extern int ip6_multipath; /* use multipath routes */
243 extern int ip6_sendredirect; /* send ICMPv6 redirect? */
244 extern int ip6_forward_srcrt; /* forward src-routed? */
245 extern int ip6_use_deprecated; /* allow deprecated addr as source */
246 extern int ip6_rr_prune; /* router renumbering prefix
247 * walk list every 5 sec. */
248 extern int ip6_mcast_pmtu; /* path MTU discovery for multicast */
249 extern const int ip6_v6only;
250
251 extern struct socket *ip6_mrouter; /* multicast routing daemon */
252 extern int ip6_sendredirects; /* send IP redirects when forwarding? */
253 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */
254 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */
255 extern int ip6_sourcecheck; /* Verify source interface */
256 extern int ip6_sourcecheck_interval; /* Interval between log messages */
257 extern int ip6_accept_rtadv; /* Acts as a host not a router */
258 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */
259 extern int ip6_log_interval;
260 extern time_t ip6_log_time;
261 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */
262 extern int ip6_dad_count; /* DupAddrDetectionTransmits */
263
264 extern int ip6_auto_flowlabel;
265 extern int ip6_auto_linklocal;
266
267 struct in6pcb;
268 struct inpcb;
269
270 int icmp6_ctloutput(int, struct socket *, int, int, struct mbuf **);
271
272 void ip6_init(void);
273 void ip6intr(void);
274 void ip6_input(struct mbuf *);
275 void ip6_freepcbopts(struct ip6_pktopts *);
276 void ip6_freemoptions(struct ip6_moptions *);
277 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int);
278 u_int8_t *ip6_get_prevhdr(struct mbuf *, int);
279 int ip6_nexthdr(struct mbuf *, int, int, int *);
280 int ip6_lasthdr(struct mbuf *, int, int, int *);
281 int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *);
282 int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
283 u_int32_t *);
284 void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **);
285 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
286
287 void ip6_forward(struct mbuf *, int);
288
289 void ip6_mloopback(struct ifnet *, struct mbuf *, struct sockaddr_in6 *);
290 int ip6_output(struct mbuf *, struct ip6_pktopts *, struct route_in6 *, int,
291 struct ip6_moptions *, struct ifnet **, struct inpcb *);
292 int ip6_ctloutput(int, struct socket *, int, int, struct mbuf **);
293 int ip6_raw_ctloutput(int, struct socket *, int, int, struct mbuf **);
294 void ip6_initpktopts(struct ip6_pktopts *);
295 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *,
296 struct ip6_pktopts *, int, int);
297 void ip6_clearpktopts(struct ip6_pktopts *, int);
298 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int);
299 int ip6_optlen(struct inpcb *);
300
301 int route6_input(struct mbuf **, int *, int);
302
303 void frag6_init(void);
304 int frag6_input(struct mbuf **, int *, int);
305 void frag6_slowtimo(void);
306 void frag6_drain(void);
307
308 void rip6_init(void);
309 int rip6_input(struct mbuf **mp, int *offp, int proto);
310 void rip6_ctlinput(int, struct sockaddr *, void *);
311 int rip6_ctloutput(int, struct socket *, int, int, struct mbuf **);
312 int rip6_output(struct mbuf *, ...);
313 int rip6_usrreq(struct socket *,
314 int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *);
315
316 int dest6_input(struct mbuf **, int *, int);
317 int none_input(struct mbuf **, int *, int);
318
319 struct in6_addr *in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *,
320 struct ip6_moptions *, struct route_in6 *, struct in6_addr *,
321 int *);
322 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *,
323 struct ip6_moptions *, struct route_in6 *, struct ifnet **,
324 struct rtentry **);
325
326 u_int32_t ip6_randomid(void);
327 u_int32_t ip6_randomflowlabel(void);
328 #endif /* _KERNEL */
329
330 #endif /* !_NETINET6_IP6_VAR_H_ */