Line data Source code
1 : /* $OpenBSD: ip6_var.h,v 1.83 2018/02/10 05:52:08 florian 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 : TAILQ_ENTRY(ip6q) ip6q_queue;
73 : LIST_HEAD(ip6asfrag_list, ip6asfrag) ip6q_asfrag;
74 : struct in6_addr ip6q_src, ip6q_dst;
75 : int ip6q_unfrglen; /* len of unfragmentable part */
76 : int ip6q_nfrag; /* # of fragments */
77 : u_int32_t ip6q_ident; /* fragment identification */
78 : u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */
79 : u_int8_t ip6q_ttl; /* time to live in slowtimo units */
80 : };
81 :
82 : struct ip6asfrag {
83 : LIST_ENTRY(ip6asfrag) ip6af_list;
84 : struct mbuf *ip6af_m;
85 : int ip6af_offset; /* offset in ip6af_m to next header */
86 : int ip6af_frglen; /* fragmentable part length */
87 : int ip6af_off; /* fragment offset */
88 : u_int32_t ip6af_flow; /* ip header flow id */
89 : u_int16_t ip6af_mff; /* more fragment bit in frag off */
90 : };
91 :
92 : struct ip6_moptions {
93 : LIST_HEAD(, in6_multi_mship) im6o_memberships;
94 : unsigned short im6o_ifidx; /* ifp index for outgoing multicasts */
95 : u_char im6o_hlim; /* hoplimit for outgoing multicasts */
96 : u_char im6o_loop; /* 1 >= hear sends if a member */
97 : };
98 :
99 : /*
100 : * Control options for outgoing packets
101 : */
102 :
103 : /* Routing header related info */
104 : struct ip6po_rhinfo {
105 : struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
106 : struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */
107 : };
108 : #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr
109 : #define ip6po_route ip6po_rhinfo.ip6po_rhi_route
110 :
111 : struct ip6_pktopts {
112 : /* Hoplimit for outgoing packets */
113 : int ip6po_hlim;
114 :
115 : /* Outgoing IF/address information */
116 : struct in6_pktinfo *ip6po_pktinfo;
117 :
118 : /* Hop-by-Hop options header */
119 : struct ip6_hbh *ip6po_hbh;
120 :
121 : /* Destination options header (before a routing header) */
122 : struct ip6_dest *ip6po_dest1;
123 :
124 : /* Routing header related info. */
125 : struct ip6po_rhinfo ip6po_rhinfo;
126 :
127 : /* Destination options header (after a routing header) */
128 : struct ip6_dest *ip6po_dest2;
129 :
130 : /* traffic class */
131 : int ip6po_tclass;
132 :
133 : /* fragment vs PMTU discovery policy */
134 : int ip6po_minmtu;
135 : #define IP6PO_MINMTU_MCASTONLY -1 /* default: send at min MTU for multicast */
136 : #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */
137 : #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */
138 :
139 : int ip6po_flags;
140 : #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */
141 : };
142 :
143 : struct ip6stat {
144 : u_int64_t ip6s_total; /* total packets received */
145 : u_int64_t ip6s_tooshort; /* packet too short */
146 : u_int64_t ip6s_toosmall; /* not enough data */
147 : u_int64_t ip6s_fragments; /* fragments received */
148 : u_int64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
149 : u_int64_t ip6s_fragtimeout; /* fragments timed out */
150 : u_int64_t ip6s_fragoverflow; /* fragments that exceeded limit */
151 : u_int64_t ip6s_forward; /* packets forwarded */
152 : u_int64_t ip6s_cantforward; /* packets rcvd for unreachable dest */
153 : u_int64_t ip6s_redirectsent; /* packets forwarded on same net */
154 : u_int64_t ip6s_delivered; /* datagrams delivered to upper level*/
155 : u_int64_t ip6s_localout; /* total ip packets generated here */
156 : u_int64_t ip6s_odropped; /* lost packets due to nobufs, etc. */
157 : u_int64_t ip6s_reassembled; /* total packets reassembled ok */
158 : u_int64_t ip6s_fragmented; /* datagrams successfully fragmented */
159 : u_int64_t ip6s_ofragments; /* output fragments created */
160 : u_int64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
161 : u_int64_t ip6s_badoptions; /* error in option processing */
162 : u_int64_t ip6s_noroute; /* packets discarded due to no route */
163 : u_int64_t ip6s_badvers; /* ip6 version != 6 */
164 : u_int64_t ip6s_rawout; /* total raw ip packets generated */
165 : u_int64_t ip6s_badscope; /* scope error */
166 : u_int64_t ip6s_notmember; /* don't join this multicast group */
167 : u_int64_t ip6s_nxthist[256]; /* next header history */
168 : u_int64_t ip6s_m1; /* one mbuf */
169 : u_int64_t ip6s_m2m[32]; /* two or more mbuf */
170 : u_int64_t ip6s_mext1; /* one ext mbuf */
171 : u_int64_t ip6s_mext2m; /* two or more ext mbuf */
172 : u_int64_t ip6s_nogif; /* no match gif found */
173 : u_int64_t ip6s_toomanyhdr; /* discarded due to too many headers */
174 :
175 : /*
176 : * statistics for improvement of the source address selection
177 : * algorithm:
178 : * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
179 : */
180 : /* number of times that address selection fails */
181 : u_int64_t ip6s_sources_none;
182 : /* number of times that an address on the outgoing I/F is chosen */
183 : u_int64_t ip6s_sources_sameif[16];
184 : /* number of times that an address on a non-outgoing I/F is chosen */
185 : u_int64_t ip6s_sources_otherif[16];
186 : /*
187 : * number of times that an address that has the same scope
188 : * from the destination is chosen.
189 : */
190 : u_int64_t ip6s_sources_samescope[16];
191 : /*
192 : * number of times that an address that has a different scope
193 : * from the destination is chosen.
194 : */
195 : u_int64_t ip6s_sources_otherscope[16];
196 : /* number of times that an deprecated address is chosen */
197 : u_int64_t ip6s_sources_deprecated[16];
198 :
199 : u_int64_t ip6s_forward_cachehit;
200 : u_int64_t ip6s_forward_cachemiss;
201 : };
202 :
203 : #ifdef _KERNEL
204 :
205 : #include <sys/percpu.h>
206 :
207 : enum ip6stat_counters {
208 : ip6s_total,
209 : ip6s_tooshort,
210 : ip6s_toosmall,
211 : ip6s_fragments,
212 : ip6s_fragdropped,
213 : ip6s_fragtimeout,
214 : ip6s_fragoverflow,
215 : ip6s_forward,
216 : ip6s_cantforward,
217 : ip6s_redirectsent,
218 : ip6s_delivered,
219 : ip6s_localout,
220 : ip6s_odropped,
221 : ip6s_reassembled,
222 : ip6s_fragmented,
223 : ip6s_ofragments,
224 : ip6s_cantfrag,
225 : ip6s_badoptions,
226 : ip6s_noroute,
227 : ip6s_badvers,
228 : ip6s_rawout,
229 : ip6s_badscope,
230 : ip6s_notmember,
231 : ip6s_nxthist,
232 : ip6s_m1 = ip6s_nxthist + 256,
233 : ip6s_m2m,
234 : ip6s_mext1 = ip6s_m2m + 32,
235 : ip6s_mext2m,
236 : ip6s_nogif,
237 : ip6s_toomanyhdr,
238 : ip6s_sources_none,
239 : ip6s_sources_sameif,
240 : ip6s_sources_otherif = ip6s_sources_sameif + 16,
241 : ip6s_sources_samescope = ip6s_sources_otherif + 16,
242 : ip6s_sources_otherscope = ip6s_sources_samescope + 16,
243 : ip6s_sources_deprecated = ip6s_sources_otherscope + 16,
244 : ip6s_forward_cachehit = ip6s_sources_deprecated + 16,
245 : ip6s_forward_cachemiss,
246 : ip6s_ncounters,
247 : };
248 :
249 : extern struct cpumem *ip6counters;
250 :
251 : static inline void
252 0 : ip6stat_inc(enum ip6stat_counters c)
253 : {
254 0 : counters_inc(ip6counters, c);
255 0 : }
256 :
257 : static inline void
258 0 : ip6stat_add(enum ip6stat_counters c, uint64_t v)
259 : {
260 0 : counters_add(ip6counters, c, v);
261 0 : }
262 :
263 : /* flags passed to ip6_output as last parameter */
264 : #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */
265 : #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
266 : #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
267 :
268 : extern int ip6_mtudisc_timeout; /* mtu discovery */
269 : extern struct rttimer_queue *icmp6_mtudisc_timeout_q;
270 :
271 : extern int ip6_defhlim; /* default hop limit */
272 : extern int ip6_defmcasthlim; /* default multicast hop limit */
273 : extern int ip6_forwarding; /* act as router? */
274 : extern int ip6_mforwarding; /* act as multicast router? */
275 : extern int ip6_multipath; /* use multipath routes */
276 : extern int ip6_sendredirect; /* send ICMPv6 redirect? */
277 : extern int ip6_use_deprecated; /* allow deprecated addr as source */
278 : extern int ip6_mcast_pmtu; /* path MTU discovery for multicast */
279 : extern int ip6_neighborgcthresh; /* Threshold # of NDP entries for GC */
280 : extern int ip6_maxdynroutes; /* Max # of routes created via redirect */
281 :
282 : extern struct socket *ip6_mrouter[RT_TABLEID_MAX]; /* multicast routing daemon */
283 : extern int ip6_sendredirects; /* send IP redirects when forwarding? */
284 : extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */
285 : extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */
286 : extern int ip6_log_interval;
287 : extern time_t ip6_log_time;
288 : extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */
289 : extern int ip6_dad_count; /* DupAddrDetectionTransmits */
290 : extern int ip6_dad_pending; /* number of currently running DADs */
291 :
292 : extern int ip6_auto_flowlabel;
293 : extern int ip6_auto_linklocal;
294 :
295 : #define IP6_SOIIKEY_LEN 16
296 : extern uint8_t ip6_soiikey[IP6_SOIIKEY_LEN];
297 :
298 : struct in6pcb;
299 : struct inpcb;
300 :
301 : int icmp6_ctloutput(int, struct socket *, int, int, struct mbuf *);
302 :
303 : void ip6_init(void);
304 : void ip6intr(void);
305 : int ip6_input_if(struct mbuf **, int *, int, int, struct ifnet *);
306 : void ip6_freepcbopts(struct ip6_pktopts *);
307 : void ip6_freemoptions(struct ip6_moptions *);
308 : int ip6_unknown_opt(u_int8_t *, struct mbuf *, int);
309 : int ip6_get_prevhdr(struct mbuf *, int);
310 : int ip6_nexthdr(struct mbuf *, int, int, int *);
311 : int ip6_lasthdr(struct mbuf *, int, int, int *);
312 : int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *);
313 : int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
314 : u_int32_t *);
315 : void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **);
316 : int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
317 :
318 : void ip6_forward(struct mbuf *, struct rtentry *, int);
319 :
320 : void ip6_mloopback(struct ifnet *, struct mbuf *, struct sockaddr_in6 *);
321 : int ip6_output(struct mbuf *, struct ip6_pktopts *, struct route_in6 *, int,
322 : struct ip6_moptions *, struct inpcb *);
323 : int ip6_fragment(struct mbuf *, int, u_char, u_long);
324 : int ip6_ctloutput(int, struct socket *, int, int, struct mbuf *);
325 : int ip6_raw_ctloutput(int, struct socket *, int, int, struct mbuf *);
326 : void ip6_initpktopts(struct ip6_pktopts *);
327 : int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *,
328 : struct ip6_pktopts *, int, int);
329 : void ip6_clearpktopts(struct ip6_pktopts *, int);
330 : void ip6_randomid_init(void);
331 : u_int32_t ip6_randomid(void);
332 : void ip6_send(struct mbuf *);
333 :
334 : int route6_input(struct mbuf **, int *, int, int);
335 :
336 : void frag6_init(void);
337 : int frag6_input(struct mbuf **, int *, int, int);
338 : int frag6_deletefraghdr(struct mbuf *, int);
339 : void frag6_slowtimo(void);
340 :
341 : void rip6_init(void);
342 : int rip6_input(struct mbuf **, int *, int, int);
343 : void rip6_ctlinput(int, struct sockaddr *, u_int, void *);
344 : int rip6_ctloutput(int, struct socket *, int, int, struct mbuf *);
345 : int rip6_output(struct mbuf *, struct socket *, struct sockaddr *,
346 : struct mbuf *);
347 : int rip6_usrreq(struct socket *,
348 : int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *);
349 : int rip6_attach(struct socket *, int);
350 : int rip6_detach(struct socket *);
351 : int rip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
352 :
353 : int dest6_input(struct mbuf **, int *, int, int);
354 : int none_input(struct mbuf **, int *, int);
355 :
356 : int in6_pcbselsrc(struct in6_addr **, struct sockaddr_in6 *,
357 : struct inpcb *, struct ip6_pktopts *);
358 : int in6_selectsrc(struct in6_addr **, struct sockaddr_in6 *,
359 : struct ip6_moptions *, unsigned int);
360 : struct rtentry *in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *,
361 : struct route_in6 *, unsigned int rtableid);
362 :
363 : u_int32_t ip6_randomflowlabel(void);
364 :
365 : #ifdef IPSEC
366 : struct tdb;
367 : struct tdb *
368 : ip6_output_ipsec_lookup(struct mbuf *, int *, struct inpcb *);
369 : int ip6_output_ipsec_send(struct tdb *, struct mbuf *, int, int);
370 : #endif /* IPSEC */
371 :
372 : #endif /* _KERNEL */
373 :
374 : #endif /* !_NETINET6_IP6_VAR_H_ */
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