kernel - network protocol thread routing
[dragonfly.git] / sys / netinet6 / ip6_var.h
CommitLineData
984263bc 1/* $FreeBSD: src/sys/netinet6/ip6_var.h,v 1.2.2.4 2003/01/23 21:06:47 sam Exp $ */
5aa41e7c 2/* $DragonFly: src/sys/netinet6/ip6_var.h,v 1.13 2008/09/04 09:08:22 hasso Exp $ */
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3/* $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $ */
4
5/*
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34/*
35 * Copyright (c) 1982, 1986, 1993
36 * The Regents of the University of California. All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. All advertising materials mentioning features or use of this software
47 * must display the following acknowledgement:
48 * This product includes software developed by the University of
49 * California, Berkeley and its contributors.
50 * 4. Neither the name of the University nor the names of its contributors
51 * may be used to endorse or promote products derived from this software
52 * without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 * SUCH DAMAGE.
65 *
66 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93
67 */
68
69#ifndef _NETINET6_IP6_VAR_H_
70#define _NETINET6_IP6_VAR_H_
71
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72#ifndef _SYS_TYPES_H_
73#include <sys/types.h>
74#endif
75#ifndef _SYS_QUEUE_H_
76#include <sys/queue.h>
77#endif
78#ifndef _NETINET_IN_H_
79#include <netinet/in.h>
80#endif
81
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82/*
83 * IP6 reassembly queue structure. Each fragment
84 * being reassembled is attached to one of these structures.
85 */
86struct ip6q {
87 u_int32_t ip6q_head;
88 u_int16_t ip6q_len;
89 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */
90 u_int8_t ip6q_hlim;
91 struct ip6asfrag *ip6q_down;
92 struct ip6asfrag *ip6q_up;
93 u_int32_t ip6q_ident;
94 u_int8_t ip6q_arrive;
95 u_int8_t ip6q_ttl;
96 struct in6_addr ip6q_src, ip6q_dst;
97 struct ip6q *ip6q_next;
98 struct ip6q *ip6q_prev;
99 int ip6q_unfrglen; /* len of unfragmentable part */
100#ifdef notyet
101 u_char *ip6q_nxtp;
102#endif
103};
104
105struct ip6asfrag {
106 u_int32_t ip6af_head;
107 u_int16_t ip6af_len;
108 u_int8_t ip6af_nxt;
109 u_int8_t ip6af_hlim;
110 /* must not override the above members during reassembling */
111 struct ip6asfrag *ip6af_down;
112 struct ip6asfrag *ip6af_up;
113 struct mbuf *ip6af_m;
114 int ip6af_offset; /* offset in ip6af_m to next header */
115 int ip6af_frglen; /* fragmentable part length */
116 int ip6af_off; /* fragment offset */
117 u_int16_t ip6af_mff; /* more fragment bit in frag off */
118};
119
120#define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
121
122struct ip6_moptions {
123 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
124 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */
125 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */
126 LIST_HEAD(, in6_multi_mship) im6o_memberships;
127};
128
129/*
130 * Control options for outgoing packets
131 */
132
133/* Routing header related info */
134struct ip6po_rhinfo {
135 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
136 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */
137};
138#define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr
139#define ip6po_route ip6po_rhinfo.ip6po_rhi_route
140
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141/* Nexthop related info */
142struct ip6po_nhinfo {
143 struct sockaddr *ip6po_nhi_nexthop;
144 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */
145};
146#define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop
147#define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route
148
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149struct ip6_pktopts {
150 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */
151 int ip6po_hlim; /* Hoplimit for outgoing packets */
152
153 /* Outgoing IF/address information */
154 struct in6_pktinfo *ip6po_pktinfo;
155
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156 /* Next-hop address information */
157 struct ip6po_nhinfo ip6po_nhinfo;
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158
159 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
160
161 /* Destination options header (before a routing header) */
162 struct ip6_dest *ip6po_dest1;
163
164 /* Routing header related info. */
165 struct ip6po_rhinfo ip6po_rhinfo;
166
167 /* Destination options header (after a routing header) */
168 struct ip6_dest *ip6po_dest2;
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169 /*
170 * below fields are introduced in RFC3542
171 */
172 int ip6po_tclass; /* traffic class */
173 int ip6po_minmtu; /* fragment vs PMTU discovery policy */
174#define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/
175#define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */
176#define IP6PO_MINMTU_ALL 1 /* always send at min MTU */
177 int ip6po_prefer_tempaddr; /* whether temporary addresses are
178 preferred as source address */
179#define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */
180#define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */
181#define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */
182
183 int ip6po_flags;
184#if 0 /* Parameters in this block are obsolete. Do not reuse the values. */
185#define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */
186#define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */
187#endif
188#define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */
189#define IP6PO_USECOA 0x08 /* use care of address */
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190};
191
192/*
193 * Control options for incoming packets
194 */
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195struct ip6stat {
196 u_quad_t ip6s_total; /* total packets received */
197 u_quad_t ip6s_tooshort; /* packet too short */
198 u_quad_t ip6s_toosmall; /* not enough data */
199 u_quad_t ip6s_fragments; /* fragments received */
200 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
201 u_quad_t ip6s_fragtimeout; /* fragments timed out */
202 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */
203 u_quad_t ip6s_forward; /* packets forwarded */
204 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */
205 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */
206 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/
207 u_quad_t ip6s_localout; /* total ip packets generated here */
208 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */
209 u_quad_t ip6s_reassembled; /* total packets reassembled ok */
d0d91865 210 u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */
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211 u_quad_t ip6s_ofragments; /* output fragments created */
212 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
213 u_quad_t ip6s_badoptions; /* error in option processing */
214 u_quad_t ip6s_noroute; /* packets discarded due to no route */
215 u_quad_t ip6s_badvers; /* ip6 version != 6 */
216 u_quad_t ip6s_rawout; /* total raw ip packets generated */
217 u_quad_t ip6s_badscope; /* scope error */
218 u_quad_t ip6s_notmember; /* don't join this multicast group */
219 u_quad_t ip6s_nxthist[256]; /* next header history */
220 u_quad_t ip6s_m1; /* one mbuf */
221 u_quad_t ip6s_m2m[32]; /* two or more mbuf */
222 u_quad_t ip6s_mext1; /* one ext mbuf */
223 u_quad_t ip6s_mext2m; /* two or more ext mbuf */
224 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */
225 u_quad_t ip6s_nogif; /* no match gif found */
226 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */
227
228 /*
229 * statistics for improvement of the source address selection
230 * algorithm:
231 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
232 */
233 /* number of times that address selection fails */
234 u_quad_t ip6s_sources_none;
235 /* number of times that an address on the outgoing I/F is chosen */
236 u_quad_t ip6s_sources_sameif[16];
237 /* number of times that an address on a non-outgoing I/F is chosen */
238 u_quad_t ip6s_sources_otherif[16];
239 /*
240 * number of times that an address that has the same scope
241 * from the destination is chosen.
242 */
243 u_quad_t ip6s_sources_samescope[16];
244 /*
245 * number of times that an address that has a different scope
246 * from the destination is chosen.
247 */
248 u_quad_t ip6s_sources_otherscope[16];
249 /* number of times that an deprecated address is chosen */
250 u_quad_t ip6s_sources_deprecated[16];
251
252 u_quad_t ip6s_forward_cachehit;
253 u_quad_t ip6s_forward_cachemiss;
254};
255
256#ifdef _KERNEL
257/*
258 * IPv6 onion peeling state.
259 * it will be initialized when we come into ip6_input().
260 * XXX do not make it a kitchen sink!
261 */
262struct ip6aux {
263 u_int32_t ip6a_flags;
264#define IP6A_SWAP 0x01 /* swapped home/care-of on packet */
265#define IP6A_HASEEN 0x02 /* HA was present */
266#define IP6A_BRUID 0x04 /* BR Unique Identifier was present */
267#define IP6A_RTALERTSEEN 0x08 /* rtalert present */
268
269 /* ip6.ip6_src */
270 struct in6_addr ip6a_careof; /* care-of address of the peer */
271 struct in6_addr ip6a_home; /* home address of the peer */
272 u_int16_t ip6a_bruid; /* BR unique identifier */
273
274 /* ip6.ip6_dst */
275 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */
276
277 /* rtalert */
278 u_int16_t ip6a_rtalert; /* rtalert option value */
279
280 /*
281 * decapsulation history will be here.
282 * with IPsec it may not be accurate.
283 */
284};
285#endif
286
287#ifdef _KERNEL
288/* flags passed to ip6_output as last parameter */
289#define IPV6_DADOUTPUT 0x01 /* DAD */
290#define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
291#define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
292
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293/* direction passed to ip_mport as last parameter */
294#define IP6_MPORT_IN 0 /* Find lwkt port for incoming packets */
295#define IP6_MPORT_OUT 1 /* Find lwkt port for outgoing packets */
296
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297extern struct ip6stat ip6stat; /* statistics */
298extern u_int32_t ip6_id; /* fragment identifier */
299extern int ip6_defhlim; /* default hop limit */
300extern int ip6_defmcasthlim; /* default multicast hop limit */
301extern int ip6_forwarding; /* act as router? */
302extern int ip6_forward_srcrt; /* forward src-routed? */
303extern int ip6_gif_hlim; /* Hop limit for gif encap packet */
304extern int ip6_use_deprecated; /* allow deprecated addr as source */
305extern int ip6_rr_prune; /* router renumbering prefix
306 * walk list every 5 sec. */
307extern int ip6_v6only;
308
309extern struct socket *ip6_mrouter; /* multicast routing daemon */
310extern int ip6_sendredirects; /* send IP redirects when forwarding? */
311extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */
312extern int ip6_sourcecheck; /* Verify source interface */
313extern int ip6_sourcecheck_interval; /* Interval between log messages */
314extern int ip6_accept_rtadv; /* Acts as a host not a router */
315extern int ip6_keepfaith; /* Firewall Aided Internet Translator */
316extern int ip6_log_interval;
317extern time_t ip6_log_time;
318extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */
319extern int ip6_dad_count; /* DupAddrDetectionTransmits */
320
321extern u_int32_t ip6_flow_seq;
322extern int ip6_auto_flowlabel;
323extern int ip6_auto_linklocal;
324
325extern int ip6_anonportmin; /* minimum ephemeral port */
326extern int ip6_anonportmax; /* maximum ephemeral port */
327extern int ip6_lowportmin; /* minimum reserved port */
328extern int ip6_lowportmax; /* maximum reserved port */
329
330extern int ip6_use_tempaddr; /* whether to use temporary addresses. */
331
e7e55f42 332extern struct pfil_head inet6_pfil_hook;
e7e55f42 333
984263bc 334extern struct pr_usrreqs rip6_usrreqs;
984263bc 335
1bd40720 336struct proc;
984263bc 337struct inpcb;
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338struct sockopt;
339struct in6_ifaddr;
340struct ip6_hdr;
341struct netmsg;
984263bc 342
56d702cc 343int icmp6_ctloutput (struct socket *, struct sockopt *sopt);
984263bc 344
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345void ip6_init (void);
346void ip6intr (void);
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347struct in6_ifaddr *ip6_getdstifaddr (struct mbuf *);
348void ip6_freepcbopts (struct ip6_pktopts *);
349void ip6_freemoptions (struct ip6_moptions *);
350int ip6_unknown_opt (u_int8_t *, struct mbuf *, int);
351char * ip6_get_prevhdr (struct mbuf *, int);
352int ip6_nexthdr (struct mbuf *, int, int, int *);
353int ip6_lasthdr (struct mbuf *, int, int, int *);
354
355struct ip6aux *ip6_addaux (struct mbuf *);
356struct ip6aux *ip6_findaux (struct mbuf *);
357void ip6_delaux (struct mbuf *);
358
359int ip6_mforward (struct ip6_hdr *, struct ifnet *, struct mbuf *);
360int ip6_process_hopopts (struct mbuf *, u_int8_t *, int, u_int32_t *,
361 u_int32_t *);
362void ip6_savecontrol (struct inpcb *, struct mbuf **, struct ip6_hdr *,
363 struct mbuf *);
364void ip6_notify_pmtu (struct inpcb *, struct sockaddr_in6 *,
365 u_int32_t *);
366int ip6_sysctl (int *, u_int, void *, size_t *, void *, size_t);
367
368void ip6_forward (struct mbuf *, int);
369
370void ip6_mloopback (struct ifnet *, struct mbuf *, struct sockaddr_in6 *);
371int ip6_output (struct mbuf *, struct ip6_pktopts *,
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372 struct route_in6 *,
373 int,
374 struct ip6_moptions *, struct ifnet **,
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375 struct inpcb *);
376int ip6_ctloutput (struct socket *, struct sockopt *sopt);
5aa41e7c 377int ip6_raw_ctloutput (struct socket *, struct sockopt *);
56d702cc 378void init_ip6pktopts (struct ip6_pktopts *);
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379int
380ip6_setpktoptions(struct mbuf *, struct ip6_pktopts *,
381 struct ip6_pktopts *, int , int);
382void ip6_clearpktopts (struct ip6_pktopts *, int);
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383struct ip6_pktopts *ip6_copypktopts (struct ip6_pktopts *, int);
384int ip6_optlen (struct inpcb *);
385
386int route6_input (struct mbuf **, int *, int);
387
388void frag6_init (void);
389int frag6_input (struct mbuf **, int *, int);
390void frag6_slowtimo (void);
391void frag6_drain (void);
392
393void rip6_init (void);
394int rip6_input (struct mbuf **mp, int *offp, int proto);
395void rip6_ctlinput (int, struct sockaddr *, void *);
396int rip6_ctloutput (struct socket *so, struct sockopt *sopt);
deffea2e 397int rip6_output (struct mbuf *, struct socket *, ...);
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398int rip6_usrreq (struct socket *,
399 int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *);
400
401int dest6_input (struct mbuf **, int *, int);
402int none_input (struct mbuf **, int *, int);
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403#endif /* _KERNEL */
404
405#endif /* !_NETINET6_IP6_VAR_H_ */