1/*
2 * Copyright (c) 2000-2018 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29/*
30 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
31 * All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 * 1. Redistributions of source code must retain the above copyright
37 * notice, this list of conditions and the following disclaimer.
38 * 2. Redistributions in binary form must reproduce the above copyright
39 * notice, this list of conditions and the following disclaimer in the
40 * documentation and/or other materials provided with the distribution.
41 * 3. Neither the name of the project nor the names of its contributors
42 * may be used to endorse or promote products derived from this software
43 * without specific prior written permission.
44 *
45 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
48 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
55 * SUCH DAMAGE.
56 */
57
58/*
59 * Copyright (c) 1982, 1986, 1993
60 * The Regents of the University of California. All rights reserved.
61 *
62 * Redistribution and use in source and binary forms, with or without
63 * modification, are permitted provided that the following conditions
64 * are met:
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 * 2. Redistributions in binary form must reproduce the above copyright
68 * notice, this list of conditions and the following disclaimer in the
69 * documentation and/or other materials provided with the distribution.
70 * 3. All advertising materials mentioning features or use of this software
71 * must display the following acknowledgement:
72 * This product includes software developed by the University of
73 * California, Berkeley and its contributors.
74 * 4. Neither the name of the University nor the names of its contributors
75 * may be used to endorse or promote products derived from this software
76 * without specific prior written permission.
77 *
78 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
79 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
80 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
81 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
82 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
83 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
84 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
85 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
86 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
87 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
88 * SUCH DAMAGE.
89 *
90 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93
91 */
92
93#ifndef _NETINET6_IP6_VAR_H_
94#define _NETINET6_IP6_VAR_H_
95#include <sys/appleapiopts.h>
96
97#ifdef BSD_KERNEL_PRIVATE
98#include <net/ethernet.h>
99
100/*
101 * IP6 reassembly queue structure. Each fragment
102 * being reassembled is attached to one of these structures.
103 */
104struct ip6q {
105 struct ip6asfrag *ip6q_down;
106 struct ip6asfrag *ip6q_up;
107 u_int32_t ip6q_ident;
108 u_int8_t ip6q_nxt;
109 u_int8_t ip6q_ecn;
110 u_int8_t ip6q_ttl;
111 struct in6_addr ip6q_src, ip6q_dst;
112 struct ip6q *ip6q_next;
113 struct ip6q *ip6q_prev;
114 int ip6q_unfrglen; /* len of unfragmentable part */
115#ifdef notyet
116 u_char *ip6q_nxtp;
117#endif
118 int ip6q_nfrag; /* # of fragments */
119 uint32_t ip6q_csum_flags; /* checksum flags */
120 uint32_t ip6q_csum; /* partial checksum value */
121};
122
123struct ip6asfrag {
124 struct ip6asfrag *ip6af_down;
125 struct ip6asfrag *ip6af_up;
126 struct mbuf *ip6af_m;
127 int ip6af_offset; /* offset in ip6af_m to next header */
128 int ip6af_frglen; /* fragmentable part length */
129 int ip6af_off; /* fragment offset */
130 u_int16_t ip6af_mff; /* more fragment bit in frag off */
131};
132
133#define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
134
135struct ip6_moptions {
136 decl_lck_mtx_data(, im6o_lock);
137 uint32_t im6o_refcnt; /* ref count */
138 uint32_t im6o_debug; /* see ifa_debug flags */
139 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
140 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */
141 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */
142 u_short im6o_num_memberships; /* no. memberships this socket */
143 u_short im6o_max_memberships; /* max memberships this socket */
144 struct in6_multi **im6o_membership; /* group memberships */
145 struct in6_mfilter *im6o_mfilters; /* source filters */
146 void (*im6o_trace) /* callback fn for tracing refs */
147 (struct ip6_moptions *, int);
148};
149
150#define IM6O_LOCK_ASSERT_HELD(_im6o) \
151 LCK_MTX_ASSERT(&(_im6o)->im6o_lock, LCK_MTX_ASSERT_OWNED)
152
153#define IM6O_LOCK_ASSERT_NOTHELD(_im6o) \
154 LCK_MTX_ASSERT(&(_im6o)->im6o_lock, LCK_MTX_ASSERT_NOTOWNED)
155
156#define IM6O_LOCK(_im6o) \
157 lck_mtx_lock(&(_im6o)->im6o_lock)
158
159#define IM6O_LOCK_SPIN(_im6o) \
160 lck_mtx_lock_spin(&(_im6o)->im6o_lock)
161
162#define IM6O_CONVERT_LOCK(_im6o) do { \
163 IM6O_LOCK_ASSERT_HELD(_im6o); \
164 lck_mtx_convert_spin(&(_im6o)->im6o_lock); \
165} while (0)
166
167#define IM6O_UNLOCK(_im6o) \
168 lck_mtx_unlock(&(_im6o)->im6o_lock)
169
170#define IM6O_ADDREF(_im6o) \
171 im6o_addref(_im6o, 0)
172
173#define IM6O_ADDREF_LOCKED(_im6o) \
174 im6o_addref(_im6o, 1)
175
176#define IM6O_REMREF(_im6o) \
177 im6o_remref(_im6o)
178
179struct ip6_exthdrs {
180 struct mbuf *ip6e_ip6;
181 struct mbuf *ip6e_hbh;
182 struct mbuf *ip6e_dest1;
183 struct mbuf *ip6e_rthdr;
184 struct mbuf *ip6e_dest2;
185 boolean_t merged;
186};
187
188/*
189 * Control options for outgoing packets
190 */
191
192/* Routing header related info */
193struct ip6po_rhinfo {
194 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
195 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */
196};
197#define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr
198#define ip6po_route ip6po_rhinfo.ip6po_rhi_route
199
200/* Nexthop related info */
201struct ip6po_nhinfo {
202 struct sockaddr *ip6po_nhi_nexthop;
203 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */
204};
205#define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop
206#define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route
207
208struct ip6_pktopts {
209 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */
210 int ip6po_hlim; /* Hoplimit for outgoing packets */
211
212 /* Outgoing IF/address information */
213 struct in6_pktinfo *ip6po_pktinfo;
214
215 /* Next-hop address information */
216 struct ip6po_nhinfo ip6po_nhinfo;
217
218 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
219
220 /* Destination options header (before a routing header) */
221 struct ip6_dest *ip6po_dest1;
222
223 /* Routing header related info. */
224 struct ip6po_rhinfo ip6po_rhinfo;
225
226 /* Destination options header (after a routing header) */
227 struct ip6_dest *ip6po_dest2;
228
229 int ip6po_tclass; /* traffic class */
230
231 int ip6po_minmtu; /* fragment vs PMTU discovery policy */
232#define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast */
233#define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */
234#define IP6PO_MINMTU_ALL 1 /* always send at min MTU */
235
236 /* whether temporary addresses are preferred as source address */
237 int ip6po_prefer_tempaddr;
238
239#define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */
240#define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */
241#define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */
242
243 int ip6po_flags;
244#if 0 /* parameters in this block is obsolete. do not reuse the values. */
245#define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */
246#define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */
247#endif
248#define IP6PO_DONTFRAG 0x04 /* no fragmentation (IPV6_DONTFRAG) */
249#define IP6PO_USECOA 0x08 /* use care of address */
250};
251
252/*
253 * Control options for incoming packets
254 */
255#endif /* BSD_KERNEL_PRIVATE */
256
257#define IP6S_SRCRULE_COUNT 16
258#include <netinet6/scope6_var.h>
259
260struct ip6stat {
261 u_quad_t ip6s_total; /* total packets received */
262 u_quad_t ip6s_tooshort; /* packet too short */
263 u_quad_t ip6s_toosmall; /* not enough data */
264 u_quad_t ip6s_fragments; /* fragments received */
265 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
266 u_quad_t ip6s_fragtimeout; /* fragments timed out */
267 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */
268 u_quad_t ip6s_forward; /* packets forwarded */
269 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */
270 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */
271 u_quad_t ip6s_delivered; /* datagrams delivered to upper level */
272 u_quad_t ip6s_localout; /* total ip packets generated here */
273 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */
274 u_quad_t ip6s_reassembled; /* total packets reassembled ok */
275 u_quad_t ip6s_atmfrag_rcvd; /* atomic fragments received */
276 u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */
277 u_quad_t ip6s_ofragments; /* output fragments created */
278 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
279 u_quad_t ip6s_badoptions; /* error in option processing */
280 u_quad_t ip6s_noroute; /* packets discarded due to no route */
281 u_quad_t ip6s_badvers; /* ip6 version != 6 */
282 u_quad_t ip6s_rawout; /* total raw ip packets generated */
283 u_quad_t ip6s_badscope; /* scope error */
284 u_quad_t ip6s_notmember; /* don't join this multicast group */
285 u_quad_t ip6s_nxthist[256]; /* next header history */
286 u_quad_t ip6s_m1; /* one mbuf */
287 u_quad_t ip6s_m2m[32]; /* two or more mbuf */
288 u_quad_t ip6s_mext1; /* one ext mbuf */
289 u_quad_t ip6s_mext2m; /* two or more ext mbuf */
290 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */
291 u_quad_t ip6s_nogif; /* no match gif found */
292 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */
293
294 /*
295 * statistics for improvement of the source address selection
296 * algorithm:
297 */
298 /* number of times that address selection fails */
299 u_quad_t ip6s_sources_none;
300 /* number of times that an address on the outgoing I/F is chosen */
301 u_quad_t ip6s_sources_sameif[SCOPE6_ID_MAX];
302 /* number of times that an address on a non-outgoing I/F is chosen */
303 u_quad_t ip6s_sources_otherif[SCOPE6_ID_MAX];
304 /*
305 * number of times that an address that has the same scope
306 * from the destination is chosen.
307 */
308 u_quad_t ip6s_sources_samescope[SCOPE6_ID_MAX];
309 /*
310 * number of times that an address that has a different scope
311 * from the destination is chosen.
312 */
313 u_quad_t ip6s_sources_otherscope[SCOPE6_ID_MAX];
314 /* number of times that a deprecated address is chosen */
315 u_quad_t ip6s_sources_deprecated[SCOPE6_ID_MAX];
316
317 u_quad_t ip6s_forward_cachehit;
318 u_quad_t ip6s_forward_cachemiss;
319
320 /* number of times that each rule of source selection is applied. */
321 u_quad_t ip6s_sources_rule[IP6S_SRCRULE_COUNT];
322
323 /* number of times we ignored address on expensive secondary interfaces */
324 u_quad_t ip6s_sources_skip_expensive_secondary_if;
325
326 /* pkt dropped, no mbufs for control data */
327 u_quad_t ip6s_pktdropcntrl;
328
329 /* total packets trimmed/adjusted */
330 u_quad_t ip6s_adj;
331 /* hwcksum info discarded during adjustment */
332 u_quad_t ip6s_adj_hwcsum_clr;
333
334 /* duplicate address detection collisions */
335 u_quad_t ip6s_dad_collide;
336
337 /* DAD NS looped back */
338 u_quad_t ip6s_dad_loopcount;
339
340 /* NECP policy related drop */
341 u_quad_t ip6s_necp_policy_drop;
342
343 /* CLAT46 stats */
344 u_quad_t ip6s_clat464_in_tooshort_drop;
345 u_quad_t ip6s_clat464_in_nov6addr_drop;
346 u_quad_t ip6s_clat464_in_nov4addr_drop;
347 u_quad_t ip6s_clat464_in_v4synthfail_drop;
348 u_quad_t ip6s_clat464_in_64transfail_drop;
349 u_quad_t ip6s_clat464_in_64proto_transfail_drop;
350 u_quad_t ip6s_clat464_in_64frag_transfail_drop;
351 u_quad_t ip6s_clat464_in_invalpbuf_drop;
352 u_quad_t ip6s_clat464_in_success;
353 u_quad_t ip6s_clat464_in_drop;
354 u_quad_t ip6s_clat464_in_v4_drop;
355
356 u_quad_t ip6s_clat464_out_nov6addr_drop;
357 u_quad_t ip6s_clat464_out_v6synthfail_drop;
358 u_quad_t ip6s_clat464_out_46transfail_drop;
359 u_quad_t ip6s_clat464_out_46proto_transfail_drop;
360 u_quad_t ip6s_clat464_out_46frag_transfail_drop;
361 u_quad_t ip6s_clat464_out_invalpbuf_drop;
362 u_quad_t ip6s_clat464_out_success;
363 u_quad_t ip6s_clat464_out_drop;
364
365 u_quad_t ip6s_clat464_v6addr_conffail;
366 u_quad_t ip6s_clat464_plat64_pfx_setfail;
367 u_quad_t ip6s_clat464_plat64_pfx_getfail;
368};
369
370enum ip6s_sources_rule_index {
371 IP6S_SRCRULE_0, IP6S_SRCRULE_1, IP6S_SRCRULE_2, IP6S_SRCRULE_3, IP6S_SRCRULE_4,
372 IP6S_SRCRULE_5, IP6S_SRCRULE_6, IP6S_SRCRULE_7,
373 IP6S_SRCRULE_7x, IP6S_SRCRULE_8
374};
375
376#ifdef BSD_KERNEL_PRIVATE
377/*
378 * IPv6 onion peeling state.
379 *
380 * This is currently allocated for packets destined to the all-nodes
381 * multicast address over Ethernet. IPv6 destination address information
382 * is now stored in the mbuf itself.
383 */
384struct ip6aux {
385 u_int32_t ip6a_flags;
386#define IP6A_HASEEN 0x01 /* HA was present */
387
388#ifdef notyet
389#define IP6A_SWAP 0x02 /* swapped home/care-of on packet */
390#define IP6A_BRUID 0x04 /* BR Unique Identifier was present */
391#define IP6A_RTALERTSEEN 0x08 /* rtalert present */
392
393 /* ip6.ip6_src */
394 struct in6_addr ip6a_careof; /* care-of address of the peer */
395 struct in6_addr ip6a_home; /* home address of the peer */
396 u_int16_t ip6a_bruid; /* BR unique identifier */
397
398 /* rtalert */
399 u_int16_t ip6a_rtalert; /* rtalert option value */
400#endif /* notyet */
401
402 /* ether source address if all-nodes multicast destination */
403 u_char ip6a_ehsrc[ETHER_ADDR_LEN];
404};
405
406/* flags passed to ip6_output as last parameter */
407#define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */
408#define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
409#define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
410#define IPV6_FLAG_NOSRCIFSEL 0x80 /* bypas source address selection */
411#define IPV6_OUTARGS 0x100 /* has ancillary output info */
412
413#ifdef BSD_KERNEL_PRIVATE
414#define IP6_HDR_ALIGNED_P(_ip6) ((((uintptr_t)(_ip6)) & ((uintptr_t)3)) == 0)
415
416/*
417 * On platforms which require strict alignment (currently for anything but
418 * i386 or x86_64), this macro checks whether the pointer to the IP header
419 * is 32-bit aligned, and assert otherwise.
420 */
421#if defined(__i386__) || defined(__x86_64__)
422#define IP6_HDR_STRICT_ALIGNMENT_CHECK(_ip6) do { } while (0)
423#else /* !__i386__ && !__x86_64__ */
424#define IP6_HDR_STRICT_ALIGNMENT_CHECK(_ip6) do { \
425 if (!IP_HDR_ALIGNED_P(_ip6)) { \
426 panic_plain("\n%s: Unaligned IPv6 header %p\n", \
427 __func__, _ip6); \
428 } \
429} while (0)
430#endif /* !__i386__ && !__x86_64__ */
431#endif /* BSD_KERNEL_PRIVATE */
432
433#include <net/flowadv.h>
434
435/*
436 * Extra information passed to ip6_output when IPV6_OUTARGS is set.
437 */
438struct ip6_out_args {
439 unsigned int ip6oa_boundif; /* bound outgoing interface */
440 struct flowadv ip6oa_flowadv; /* flow advisory code */
441 u_int32_t ip6oa_flags; /* IP6OAF flags (see below) */
442#define IP6OAF_SELECT_SRCIF 0x00000001 /* src interface selection */
443#define IP6OAF_BOUND_IF 0x00000002 /* boundif value is valid */
444#define IP6OAF_BOUND_SRCADDR 0x00000004 /* bound to src address */
445#define IP6OAF_NO_CELLULAR 0x00000010 /* skip IFT_CELLULAR */
446#define IP6OAF_NO_EXPENSIVE 0x00000020 /* skip IFEF_EXPENSIVE */
447#define IP6OAF_AWDL_UNRESTRICTED 0x00000040 /* privileged AWDL */
448#define IP6OAF_QOSMARKING_ALLOWED 0x00000080 /* policy allows Fastlane DSCP marking */
449#define IP6OAF_INTCOPROC_ALLOWED 0x00000100 /* access to internal coproc interfaces */
450#define IP6OAF_NO_LOW_POWER 0x00000200 /* skip low power */
451 u_int32_t ip6oa_retflags; /* IP6OARF return flags (see below) */
452#define IP6OARF_IFDENIED 0x00000001 /* denied access to interface */
453 int ip6oa_sotc; /* traffic class for Fastlane DSCP mapping */
454 int ip6oa_netsvctype;
455};
456
457extern struct ip6stat ip6stat; /* statistics */
458extern int ip6_defhlim; /* default hop limit */
459extern int ip6_defmcasthlim; /* default multicast hop limit */
460extern int ip6_forwarding; /* act as router? */
461extern int ip6_gif_hlim; /* Hop limit for gif encap packet */
462extern int ip6_use_deprecated; /* allow deprecated addr as source */
463extern int ip6_rr_prune; /* router renumbering prefix */
464 /* walk list every 5 sec. */
465extern int ip6_mcast_pmtu; /* enable pMTU discovery for multicast? */
466#define ip6_mapped_addr_on (!ip6_v6only)
467extern int ip6_v6only;
468
469extern int ip6_neighborgcthresh; /* Threshold # of NDP entries for GC */
470extern int ip6_maxifprefixes; /* Max acceptable prefixes via RA per IF */
471extern int ip6_maxifdefrouters; /* Max acceptable def routers via RA */
472extern int ip6_maxdynroutes; /* Max # of routes created via redirect */
473extern int ip6_sendredirects; /* send IP redirects when forwarding? */
474extern int ip6_accept_rtadv; /* deprecated */
475extern int ip6_log_interval;
476extern uint64_t ip6_log_time;
477extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */
478extern int ip6_dad_count; /* DupAddrDetectionTransmits */
479
480/* RFC4193 Unique Local Unicast Prefixes only */
481extern int ip6_only_allow_rfc4193_prefix;
482
483extern int ip6_auto_flowlabel;
484extern int ip6_auto_linklocal;
485
486extern int ip6_anonportmin; /* minimum ephemeral port */
487extern int ip6_anonportmax; /* maximum ephemeral port */
488extern int ip6_lowportmin; /* minimum reserved port */
489extern int ip6_lowportmax; /* maximum reserved port */
490
491extern int ip6_use_tempaddr; /* whether to use temporary addresses. */
492
493/* whether to prefer temporary addresses in the source address selection */
494extern int ip6_prefer_tempaddr;
495
496/* whether to use the default scope zone when unspecified */
497extern int ip6_use_defzone;
498
499extern struct pr_usrreqs rip6_usrreqs;
500extern struct pr_usrreqs icmp6_dgram_usrreqs;
501
502struct sockopt;
503struct inpcb;
504struct ip6_hdr;
505struct in6_ifaddr;
506struct ip6protosw;
507struct domain;
508
509extern int icmp6_ctloutput(struct socket *, struct sockopt *);
510extern int icmp6_dgram_ctloutput(struct socket *, struct sockopt *);
511extern int icmp6_dgram_send(struct socket *, int, struct mbuf *,
512 struct sockaddr *, struct mbuf *, struct proc *);
513extern int icmp6_dgram_attach(struct socket *, int, struct proc *);
514
515extern void ip6_init(struct ip6protosw *, struct domain *);
516extern void ip6_input(struct mbuf *);
517extern void ip6_setsrcifaddr_info(struct mbuf *, uint32_t, struct in6_ifaddr *);
518extern void ip6_setdstifaddr_info(struct mbuf *, uint32_t, struct in6_ifaddr *);
519extern int ip6_getsrcifaddr_info(struct mbuf *, uint32_t *, uint32_t *);
520extern int ip6_getdstifaddr_info(struct mbuf *, uint32_t *, uint32_t *);
521extern void ip6_freepcbopts(struct ip6_pktopts *);
522extern int ip6_unknown_opt(u_int8_t *, struct mbuf *, int);
523extern char *ip6_get_prevhdr(struct mbuf *, int);
524extern int ip6_nexthdr(struct mbuf *, int, int, int *);
525extern int ip6_lasthdr(struct mbuf *, int, int, int *);
526
527extern void ip6_moptions_init(void);
528extern struct ip6_moptions *ip6_allocmoptions(int);
529extern void im6o_addref(struct ip6_moptions *, int);
530extern void im6o_remref(struct ip6_moptions *);
531
532extern struct ip6aux *ip6_addaux(struct mbuf *);
533extern struct ip6aux *ip6_findaux(struct mbuf *);
534extern void ip6_delaux(struct mbuf *);
535
536extern int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
537 u_int32_t *);
538extern struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *,
539 struct mbuf **, int *);
540extern int ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **);
541extern struct mbuf *ip6_forward(struct mbuf *, struct route_in6 *, int);
542extern void ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, u_int32_t *);
543extern void ip6_mloopback(struct ifnet *, struct ifnet *, struct mbuf *,
544 struct sockaddr_in6 *, uint32_t, int32_t);
545extern int ip6_output(struct mbuf *, struct ip6_pktopts *, struct route_in6 *,
546 int, struct ip6_moptions *, struct ifnet **, struct ip6_out_args *);
547extern int ip6_output_list(struct mbuf *, int, struct ip6_pktopts *,
548 struct route_in6 *, int, struct ip6_moptions *, struct ifnet **,
549 struct ip6_out_args *);
550extern int ip6_ctloutput(struct socket *, struct sockopt *);
551extern int ip6_raw_ctloutput(struct socket *, struct sockopt *);
552extern void ip6_initpktopts(struct ip6_pktopts *);
553extern int ip6_setpktoptions(struct mbuf *, struct ip6_pktopts *, int, int);
554extern void ip6_clearpktopts(struct ip6_pktopts *, int);
555extern struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int);
556extern int ip6_optlen(struct inpcb *);
557extern void ip6_drain(void);
558extern int ip6_do_fragmentation(struct mbuf **, uint32_t, struct ifnet *, uint32_t,
559 struct ip6_hdr *, struct ip6_exthdrs *, uint32_t, int);
560
561extern int route6_input(struct mbuf **, int *, int);
562
563extern void frag6_init(void);
564extern int frag6_input(struct mbuf **, int *, int);
565extern void frag6_drain(void);
566
567extern int rip6_input(struct mbuf **, int *, int);
568extern void rip6_ctlinput(int, struct sockaddr *, void *, struct ifnet *);
569extern int rip6_ctloutput(struct socket *so, struct sockopt *sopt);
570extern int rip6_output(struct mbuf *, struct socket *, struct sockaddr_in6 *,
571 struct mbuf *, int);
572
573extern int dest6_input(struct mbuf **, int *, int);
574/*
575 * IPv6 source address selection hints
576 */
577#define IPV6_SRCSEL_HINT_PREFER_TMPADDR 0x00000001
578
579extern struct ifaddr * in6_selectsrc_core_ifa(struct sockaddr_in6 *, struct ifnet *, int);
580extern struct in6_addr * in6_selectsrc_core(struct sockaddr_in6 *,
581 uint32_t, struct ifnet *, int,
582 struct in6_addr *, struct ifnet **, int *, struct ifaddr **);
583extern struct in6_addr *in6_selectsrc(struct sockaddr_in6 *,
584 struct ip6_pktopts *, struct inpcb *, struct route_in6 *,
585 struct ifnet **, struct in6_addr *, unsigned int, int *);
586extern struct in6_addrpolicy *in6_addrsel_lookup_policy(struct sockaddr_in6 *);
587extern int in6_selectroute(struct sockaddr_in6 *, struct sockaddr_in6 *,
588 struct ip6_pktopts *, struct ip6_moptions *, struct in6_ifaddr **,
589 struct route_in6 *, struct ifnet **, struct rtentry **, int,
590 struct ip6_out_args *);
591extern int ip6_setpktopts(struct mbuf *control, struct ip6_pktopts *opt,
592 struct ip6_pktopts *stickyopt, int uproto);
593extern u_int32_t ip6_randomid(void);
594extern u_int32_t ip6_randomflowlabel(void);
595#endif /* BSD_KERNEL_PRIVATE */
596#endif /* !_NETINET6_IP6_VAR_H_ */
597