1 /* $NetBSD: ip6_var.h,v 1.37.12.1 2007/04/28 18:30:13 bouyer 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; /* Route to the nexthop */
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 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */
137 int ip6po_hlim; /* Hoplimit for outgoing packets */
138 struct in6_pktinfo *ip6po_pktinfo; /* Outgoing IF/address information */
139 struct ip6po_nhinfo ip6po_nhinfo; /* Next-hop address information */
140 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
141 struct ip6_dest *ip6po_dest1; /* Destination options header(1st part) */
142 struct ip6po_rhinfo ip6po_rhinfo; /* Routing header related info. */
143 struct ip6_dest *ip6po_dest2; /* Destination options header(2nd part) */
144 int ip6po_tclass; /* traffic class */
145 int ip6po_minmtu; /* fragment vs PMTU discovery policy */
146 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/
147 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */
148 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */
149 int ip6po_flags;
150 #if 0 /* parameters in this block is obsolete. do not reuse the values. */
151 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */
152 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */
153 #endif
154 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */
155 };
156
157 struct ip6stat {
158 u_quad_t ip6s_total; /* total packets received */
159 u_quad_t ip6s_tooshort; /* packet too short */
160 u_quad_t ip6s_toosmall; /* not enough data */
161 u_quad_t ip6s_fragments; /* fragments received */
162 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
163 u_quad_t ip6s_fragtimeout; /* fragments timed out */
164 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */
165 u_quad_t ip6s_forward; /* packets forwarded */
166 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */
167 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */
168 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/
169 u_quad_t ip6s_localout; /* total ip packets generated here */
170 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */
171 u_quad_t ip6s_reassembled; /* total packets reassembled ok */
172 u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */
173 u_quad_t ip6s_ofragments; /* output fragments created */
174 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
175 u_quad_t ip6s_badoptions; /* error in option processing */
176 u_quad_t ip6s_noroute; /* packets discarded due to no route */
177 u_quad_t ip6s_badvers; /* ip6 version != 6 */
178 u_quad_t ip6s_rawout; /* total raw ip packets generated */
179 u_quad_t ip6s_badscope; /* scope error */
180 u_quad_t ip6s_notmember; /* don't join this multicast group */
181 u_quad_t ip6s_nxthist[256]; /* next header history */
182 u_quad_t ip6s_m1; /* one mbuf */
183 u_quad_t ip6s_m2m[32]; /* two or more mbuf */
184 u_quad_t ip6s_mext1; /* one ext mbuf */
185 u_quad_t ip6s_mext2m; /* two or more ext mbuf */
186 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */
187 u_quad_t ip6s_nogif; /* no match gif found */
188 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */
189
190 /*
191 * statistics for improvement of the source address selection
192 * algorithm:
193 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
194 */
195 /* number of times that address selection fails */
196 u_quad_t ip6s_sources_none;
197 /* number of times that an address on the outgoing I/F is chosen */
198 u_quad_t ip6s_sources_sameif[16];
199 /* number of times that an address on a non-outgoing I/F is chosen */
200 u_quad_t ip6s_sources_otherif[16];
201 /*
202 * number of times that an address that has the same scope
203 * from the destination is chosen.
204 */
205 u_quad_t ip6s_sources_samescope[16];
206 /*
207 * number of times that an address that has a different scope
208 * from the destination is chosen.
209 */
210 u_quad_t ip6s_sources_otherscope[16];
211 /* number of times that an deprecated address is chosen */
212 u_quad_t ip6s_sources_deprecated[16];
213
214 u_quad_t ip6s_forward_cachehit;
215 u_quad_t ip6s_forward_cachemiss;
216 };
217
218 #ifdef _KERNEL
219 /*
220 * Auxiliary attributes of incoming IPv6 packets, which is initialized when we
221 * come into ip6_input().
222 * XXX do not make it a kitchen sink!
223 */
224 struct ip6aux {
225 /* ip6.ip6_dst */
226 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */
227 };
228
229 /* flags passed to ip6_output as last parameter */
230 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */
231 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
232 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
233
234 #ifdef __NO_STRICT_ALIGNMENT
235 #define IP6_HDR_ALIGNED_P(ip) 1
236 #else
237 #define IP6_HDR_ALIGNED_P(ip) ((((vaddr_t) (ip)) & 3) == 0)
238 #endif
239
240 extern struct ip6stat ip6stat; /* statistics */
241 extern u_int32_t ip6_id; /* fragment identifier */
242 extern int ip6_defhlim; /* default hop limit */
243 extern int ip6_defmcasthlim; /* default multicast hop limit */
244 extern int ip6_forwarding; /* act as router? */
245 extern int ip6_sendredirect; /* send ICMPv6 redirect? */
246 extern int ip6_forward_srcrt; /* forward src-routed? */
247 extern int ip6_use_deprecated; /* allow deprecated addr as source */
248 extern int ip6_rr_prune; /* router renumbering prefix
249 * walk list every 5 sec. */
250 extern int ip6_mcast_pmtu; /* enable pMTU discovery for multicast? */
251 extern int ip6_v6only;
252
253 extern struct socket *ip6_mrouter; /* multicast routing daemon */
254 extern int ip6_sendredirects; /* send IP redirects when forwarding? */
255 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */
256 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */
257 extern int ip6_sourcecheck; /* Verify source interface */
258 extern int ip6_sourcecheck_interval; /* Interval between log messages */
259 extern int ip6_accept_rtadv; /* Acts as a host not a router */
260 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */
261 extern int ip6_log_interval;
262 extern time_t ip6_log_time;
263 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */
264 extern int ip6_dad_count; /* DupAddrDetectionTransmits */
265
266 extern int ip6_auto_flowlabel;
267 extern int ip6_auto_linklocal;
268
269 extern int ip6_anonportmin; /* minimum ephemeral port */
270 extern int ip6_anonportmax; /* maximum ephemeral port */
271 extern int ip6_lowportmin; /* minimum reserved port */
272 extern int ip6_lowportmax; /* maximum reserved port */
273
274 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */
275 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses
276 in the source address selection */
277 extern int ip6_use_defzone; /* whether to use the default scope zone
278 when unspecified */
279
280 struct in6pcb;
281
282 int icmp6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
283 extern int ip6_rht0; /* processing routing header type 0 */
284
285 void ip6_init __P((void));
286 void ip6intr __P((void));
287 void ip6_input __P((struct mbuf *));
288 struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *));
289 void ip6_freepcbopts __P((struct ip6_pktopts *));
290 void ip6_freemoptions __P((struct ip6_moptions *));
291 int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int));
292 u_int8_t *ip6_get_prevhdr __P((struct mbuf *, int));
293 int ip6_nexthdr __P((struct mbuf *, int, int, int *));
294 int ip6_lasthdr __P((struct mbuf *, int, int, int *));
295
296 struct m_tag *ip6_addaux __P((struct mbuf *));
297 struct m_tag *ip6_findaux __P((struct mbuf *));
298 void ip6_delaux __P((struct mbuf *));
299
300 int ip6_mforward __P((struct ip6_hdr *, struct ifnet *, struct mbuf *));
301 int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *,
302 u_int32_t *));
303 void ip6_savecontrol __P((struct in6pcb *, struct mbuf **, struct ip6_hdr *,
304 struct mbuf *));
305 void ip6_notify_pmtu __P((struct in6pcb *, struct sockaddr_in6 *,
306 u_int32_t *));
307 int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
308
309 void ip6_forward __P((struct mbuf *, int));
310
311 void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *));
312 int ip6_output __P((struct mbuf *, struct ip6_pktopts *,
313 struct route_in6 *, int,
314 struct ip6_moptions *, struct socket *,
315 struct ifnet **));
316 int ip6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
317 int ip6_raw_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
318 void ip6_initpktopts __P((struct ip6_pktopts *));
319 int ip6_setpktopts __P((struct mbuf *, struct ip6_pktopts *,
320 struct ip6_pktopts *, int, int));
321 void ip6_clearpktopts __P((struct ip6_pktopts *, int));
322 struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int));
323 int ip6_optlen __P((struct in6pcb *));
324
325 int route6_input __P((struct mbuf **, int *, int));
326
327 void frag6_init __P((void));
328 int frag6_input __P((struct mbuf **, int *, int));
329 void frag6_slowtimo __P((void));
330 void frag6_drain __P((void));
331
332 void rip6_init __P((void));
333 int rip6_input __P((struct mbuf **, int *, int));
334 void rip6_ctlinput __P((int, struct sockaddr *, void *));
335 int rip6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
336 int rip6_output __P((struct mbuf *, ...));
337 int rip6_usrreq __P((struct socket *,
338 int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *));
339
340 int dest6_input __P((struct mbuf **, int *, int));
341 int none_input __P((struct mbuf **, int *, int));
342
343 struct in6_addr *in6_selectsrc __P((struct sockaddr_in6 *,
344 struct ip6_pktopts *, struct ip6_moptions *, struct route_in6 *,
345 struct in6_addr *, struct ifnet **, int *));
346 int in6_selectroute __P((struct sockaddr_in6 *, struct ip6_pktopts *,
347 struct ip6_moptions *, struct route_in6 *, struct ifnet **,
348 struct rtentry **, int));
349
350 u_int32_t ip6_randomid __P((void));
351 u_int32_t ip6_randomflowlabel __P((void));
352 #endif /* _KERNEL */
353
354 #endif /* !_NETINET6_IP6_VAR_H_ */
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