1/* $NetBSD: in6_pcb.c,v 1.152 2016/10/31 14:34:32 christos Exp $ */
2/* $KAME: in6_pcb.c,v 1.84 2001/02/08 18:02:08 itojun 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, 1991, 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 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94
62 */
63
64#include <sys/cdefs.h>
65__KERNEL_RCSID(0, "$NetBSD: in6_pcb.c,v 1.152 2016/10/31 14:34:32 christos Exp $");
66
67#ifdef _KERNEL_OPT
68#include "opt_inet.h"
69#include "opt_ipsec.h"
70#endif
71
72#include <sys/param.h>
73#include <sys/systm.h>
74#include <sys/mbuf.h>
75#include <sys/protosw.h>
76#include <sys/socket.h>
77#include <sys/socketvar.h>
78#include <sys/ioctl.h>
79#include <sys/errno.h>
80#include <sys/time.h>
81#include <sys/proc.h>
82#include <sys/kauth.h>
83#include <sys/domain.h>
84#include <sys/once.h>
85
86#include <net/if.h>
87#include <net/route.h>
88
89#include <netinet/in.h>
90#include <netinet/in_var.h>
91#include <netinet/in_systm.h>
92#include <netinet/ip.h>
93#include <netinet/in_pcb.h>
94#include <netinet/ip6.h>
95#include <netinet/portalgo.h>
96#include <netinet6/ip6_var.h>
97#include <netinet6/in6_pcb.h>
98#include <netinet6/scope6_var.h>
99#include <netinet6/nd6.h>
100
101#include "faith.h"
102
103#ifdef IPSEC
104#include <netipsec/ipsec.h>
105#include <netipsec/ipsec6.h>
106#include <netipsec/key.h>
107#endif /* IPSEC */
108
109#include <netinet/tcp_vtw.h>
110
111const struct in6_addr zeroin6_addr;
112
113#define IN6PCBHASH_PORT(table, lport) \
114 &(table)->inpt_porthashtbl[ntohs(lport) & (table)->inpt_porthash]
115#define IN6PCBHASH_BIND(table, laddr, lport) \
116 &(table)->inpt_bindhashtbl[ \
117 (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \
118 (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + ntohs(lport)) & \
119 (table)->inpt_bindhash]
120#define IN6PCBHASH_CONNECT(table, faddr, fport, laddr, lport) \
121 &(table)->inpt_bindhashtbl[ \
122 ((((faddr)->s6_addr32[0] ^ (faddr)->s6_addr32[1] ^ \
123 (faddr)->s6_addr32[2] ^ (faddr)->s6_addr32[3]) + ntohs(fport)) + \
124 (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \
125 (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + \
126 ntohs(lport))) & (table)->inpt_bindhash]
127
128int ip6_anonportmin = IPV6PORT_ANONMIN;
129int ip6_anonportmax = IPV6PORT_ANONMAX;
130int ip6_lowportmin = IPV6PORT_RESERVEDMIN;
131int ip6_lowportmax = IPV6PORT_RESERVEDMAX;
132
133static struct pool in6pcb_pool;
134
135static int
136in6pcb_poolinit(void)
137{
138
139 pool_init(&in6pcb_pool, sizeof(struct in6pcb), 0, 0, 0, "in6pcbpl",
140 NULL, IPL_SOFTNET);
141 return 0;
142}
143
144void
145in6_pcbinit(struct inpcbtable *table, int bindhashsize, int connecthashsize)
146{
147 static ONCE_DECL(control);
148
149 in_pcbinit(table, bindhashsize, connecthashsize);
150 table->inpt_lastport = (u_int16_t)ip6_anonportmax;
151
152 RUN_ONCE(&control, in6pcb_poolinit);
153}
154
155int
156in6_pcballoc(struct socket *so, void *v)
157{
158 struct inpcbtable *table = v;
159 struct in6pcb *in6p;
160 int s;
161
162 s = splnet();
163 in6p = pool_get(&in6pcb_pool, PR_NOWAIT);
164 splx(s);
165 if (in6p == NULL)
166 return (ENOBUFS);
167 memset((void *)in6p, 0, sizeof(*in6p));
168 in6p->in6p_af = AF_INET6;
169 in6p->in6p_table = table;
170 in6p->in6p_socket = so;
171 in6p->in6p_hops = -1; /* use kernel default */
172 in6p->in6p_icmp6filt = NULL;
173 in6p->in6p_portalgo = PORTALGO_DEFAULT;
174 in6p->in6p_bindportonsend = false;
175#if defined(IPSEC)
176 if (ipsec_enabled) {
177 int error = ipsec_init_pcbpolicy(so, &in6p->in6p_sp);
178 if (error != 0) {
179 s = splnet();
180 pool_put(&in6pcb_pool, in6p);
181 splx(s);
182 return error;
183 }
184 }
185#endif /* IPSEC */
186 s = splnet();
187 TAILQ_INSERT_HEAD(&table->inpt_queue, (struct inpcb_hdr*)in6p,
188 inph_queue);
189 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport),
190 &in6p->in6p_head, inph_lhash);
191 in6_pcbstate(in6p, IN6P_ATTACHED);
192 splx(s);
193 if (ip6_v6only)
194 in6p->in6p_flags |= IN6P_IPV6_V6ONLY;
195 so->so_pcb = (void *)in6p;
196 return (0);
197}
198
199/*
200 * Bind address from sin6 to in6p.
201 */
202static int
203in6_pcbbind_addr(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l)
204{
205 int error;
206 int s;
207
208 /*
209 * We should check the family, but old programs
210 * incorrectly fail to intialize it.
211 */
212 if (sin6->sin6_family != AF_INET6)
213 return (EAFNOSUPPORT);
214
215#ifndef INET
216 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
217 return (EADDRNOTAVAIL);
218#endif
219
220 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0)
221 return (error);
222
223 s = pserialize_read_enter();
224 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
225 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) {
226 error = EINVAL;
227 goto out;
228 }
229 if (sin6->sin6_addr.s6_addr32[3]) {
230 struct sockaddr_in sin;
231
232 memset(&sin, 0, sizeof(sin));
233 sin.sin_len = sizeof(sin);
234 sin.sin_family = AF_INET;
235 bcopy(&sin6->sin6_addr.s6_addr32[3],
236 &sin.sin_addr, sizeof(sin.sin_addr));
237 if (!IN_MULTICAST(sin.sin_addr.s_addr)) {
238 struct ifaddr *ifa;
239 ifa = ifa_ifwithaddr((struct sockaddr *)&sin);
240 if (ifa == NULL) {
241 error = EADDRNOTAVAIL;
242 goto out;
243 }
244 }
245 }
246 } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
247 // succeed
248 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
249 struct ifaddr *ifa = NULL;
250
251 if ((in6p->in6p_flags & IN6P_FAITH) == 0) {
252 ifa = ifa_ifwithaddr(sin6tosa(sin6));
253 if (ifa == NULL) {
254 error = EADDRNOTAVAIL;
255 goto out;
256 }
257 }
258
259 /*
260 * bind to an anycast address might accidentally
261 * cause sending a packet with an anycast source
262 * address, so we forbid it.
263 *
264 * We should allow to bind to a deprecated address,
265 * since the application dare to use it.
266 * But, can we assume that they are careful enough
267 * to check if the address is deprecated or not?
268 * Maybe, as a safeguard, we should have a setsockopt
269 * flag to control the bind(2) behavior against
270 * deprecated addresses (default: forbid bind(2)).
271 */
272 if (ifa &&
273 ifatoia6(ifa)->ia6_flags &
274 (IN6_IFF_ANYCAST | IN6_IFF_DUPLICATED)) {
275 error = EADDRNOTAVAIL;
276 goto out;
277 }
278 }
279 in6p->in6p_laddr = sin6->sin6_addr;
280 error = 0;
281out:
282 pserialize_read_exit(s);
283 return error;
284}
285
286/*
287 * Bind port from sin6 to in6p.
288 */
289static int
290in6_pcbbind_port(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l)
291{
292 struct inpcbtable *table = in6p->in6p_table;
293 struct socket *so = in6p->in6p_socket;
294 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
295 int error;
296
297 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 &&
298 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 ||
299 (so->so_options & SO_ACCEPTCONN) == 0))
300 wild = 1;
301
302 if (sin6->sin6_port != 0) {
303 enum kauth_network_req req;
304
305#ifndef IPNOPRIVPORTS
306 if (ntohs(sin6->sin6_port) < IPV6PORT_RESERVED)
307 req = KAUTH_REQ_NETWORK_BIND_PRIVPORT;
308 else
309#endif /* IPNOPRIVPORTS */
310 req = KAUTH_REQ_NETWORK_BIND_PORT;
311
312 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_BIND,
313 req, so, sin6, NULL);
314 if (error)
315 return (EACCES);
316 }
317
318 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
319 /*
320 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
321 * allow compepte duplication of binding if
322 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
323 * and a multicast address is bound on both
324 * new and duplicated sockets.
325 */
326 if (so->so_options & (SO_REUSEADDR | SO_REUSEPORT))
327 reuseport = SO_REUSEADDR|SO_REUSEPORT;
328 }
329
330 if (sin6->sin6_port != 0) {
331 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
332#ifdef INET
333 struct inpcb *t;
334 struct vestigial_inpcb vestige;
335
336 t = in_pcblookup_port(table,
337 *(struct in_addr *)&sin6->sin6_addr.s6_addr32[3],
338 sin6->sin6_port, wild, &vestige);
339 if (t && (reuseport & t->inp_socket->so_options) == 0)
340 return (EADDRINUSE);
341 if (!t
342 && vestige.valid
343 && !(reuseport && vestige.reuse_port))
344 return EADDRINUSE;
345#else
346 return (EADDRNOTAVAIL);
347#endif
348 }
349
350 {
351 struct in6pcb *t;
352 struct vestigial_inpcb vestige;
353
354 t = in6_pcblookup_port(table, &sin6->sin6_addr,
355 sin6->sin6_port, wild, &vestige);
356 if (t && (reuseport & t->in6p_socket->so_options) == 0)
357 return (EADDRINUSE);
358 if (!t
359 && vestige.valid
360 && !(reuseport && vestige.reuse_port))
361 return EADDRINUSE;
362 }
363 }
364
365 if (sin6->sin6_port == 0) {
366 int e;
367 e = in6_pcbsetport(sin6, in6p, l);
368 if (e != 0)
369 return (e);
370 } else {
371 in6p->in6p_lport = sin6->sin6_port;
372 in6_pcbstate(in6p, IN6P_BOUND);
373 }
374
375 LIST_REMOVE(&in6p->in6p_head, inph_lhash);
376 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport),
377 &in6p->in6p_head, inph_lhash);
378
379 return (0);
380}
381
382int
383in6_pcbbind(void *v, struct sockaddr_in6 *sin6, struct lwp *l)
384{
385 struct in6pcb *in6p = v;
386 struct sockaddr_in6 lsin6;
387 int error;
388
389 if (in6p->in6p_af != AF_INET6)
390 return (EINVAL);
391
392 /*
393 * If we already have a local port or a local address it means we're
394 * bounded.
395 */
396 if (in6p->in6p_lport || !(IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ||
397 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) &&
398 in6p->in6p_laddr.s6_addr32[3] == 0)))
399 return (EINVAL);
400
401 if (NULL != sin6) {
402 /* We were provided a sockaddr_in6 to use. */
403 if (sin6->sin6_len != sizeof(*sin6))
404 return (EINVAL);
405 } else {
406 /* We always bind to *something*, even if it's "anything". */
407 lsin6 = *((const struct sockaddr_in6 *)
408 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any);
409 sin6 = &lsin6;
410 }
411
412 /* Bind address. */
413 error = in6_pcbbind_addr(in6p, sin6, l);
414 if (error)
415 return (error);
416
417 /* Bind port. */
418 error = in6_pcbbind_port(in6p, sin6, l);
419 if (error) {
420 /*
421 * Reset the address here to "any" so we don't "leak" the
422 * in6pcb.
423 */
424 in6p->in6p_laddr = in6addr_any;
425
426 return (error);
427 }
428
429
430#if 0
431 in6p->in6p_flowinfo = 0; /* XXX */
432#endif
433 return (0);
434}
435
436/*
437 * Connect from a socket to a specified address.
438 * Both address and port must be specified in argument sin6.
439 * If don't have a local address for this socket yet,
440 * then pick one.
441 */
442int
443in6_pcbconnect(void *v, struct sockaddr_in6 *sin6, struct lwp *l)
444{
445 struct in6pcb *in6p = v;
446 struct in6_addr *in6a = NULL;
447 struct in6_addr ia6;
448 struct ifnet *ifp = NULL; /* outgoing interface */
449 int error = 0;
450 int scope_ambiguous = 0;
451#ifdef INET
452 struct in6_addr mapped;
453#endif
454 struct sockaddr_in6 tmp;
455 struct vestigial_inpcb vestige;
456 struct psref psref;
457 int bound;
458
459 (void)&in6a; /* XXX fool gcc */
460
461 if (in6p->in6p_af != AF_INET6)
462 return (EINVAL);
463
464 if (sin6->sin6_len != sizeof(*sin6))
465 return (EINVAL);
466 if (sin6->sin6_family != AF_INET6)
467 return (EAFNOSUPPORT);
468 if (sin6->sin6_port == 0)
469 return (EADDRNOTAVAIL);
470
471 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
472 in6p->in6p_socket->so_type == SOCK_STREAM)
473 return EADDRNOTAVAIL;
474
475 if (sin6->sin6_scope_id == 0 && !ip6_use_defzone)
476 scope_ambiguous = 1;
477 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0)
478 return(error);
479
480 /* sanity check for mapped address case */
481 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
482 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
483 return EINVAL;
484 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
485 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff);
486 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr))
487 return EINVAL;
488 } else
489 {
490 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr))
491 return EINVAL;
492 }
493
494 /* protect *sin6 from overwrites */
495 tmp = *sin6;
496 sin6 = &tmp;
497
498 bound = curlwp_bind();
499 /* Source address selection. */
500 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) &&
501 in6p->in6p_laddr.s6_addr32[3] == 0) {
502#ifdef INET
503 struct sockaddr_in sin;
504 struct in_ifaddr *ia4;
505 struct psref _psref;
506
507 memset(&sin, 0, sizeof(sin));
508 sin.sin_len = sizeof(sin);
509 sin.sin_family = AF_INET;
510 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr32[3],
511 sizeof(sin.sin_addr));
512 ia4 = in_selectsrc(&sin, &in6p->in6p_route,
513 in6p->in6p_socket->so_options, NULL, &error, &_psref);
514 if (ia4 == NULL) {
515 if (error == 0)
516 error = EADDRNOTAVAIL;
517 return (error);
518 }
519 memset(&mapped, 0, sizeof(mapped));
520 mapped.s6_addr16[5] = htons(0xffff);
521 memcpy(&mapped.s6_addr32[3], &IA_SIN(ia4)->sin_addr,
522 sizeof(IA_SIN(ia4)->sin_addr));
523 ia4_release(ia4, &_psref);
524 in6a = &mapped;
525#else
526 return EADDRNOTAVAIL;
527#endif
528 } else {
529 /*
530 * XXX: in6_selectsrc might replace the bound local address
531 * with the address specified by setsockopt(IPV6_PKTINFO).
532 * Is it the intended behavior?
533 */
534 error = in6_selectsrc(sin6, in6p->in6p_outputopts,
535 in6p->in6p_moptions, &in6p->in6p_route, &in6p->in6p_laddr,
536 &ifp, &psref, &ia6);
537 if (error == 0)
538 in6a = &ia6;
539 if (ifp && scope_ambiguous &&
540 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) {
541 if_put(ifp, &psref);
542 curlwp_bindx(bound);
543 return error;
544 }
545
546 if (in6a == NULL) {
547 if_put(ifp, &psref);
548 curlwp_bindx(bound);
549 if (error == 0)
550 error = EADDRNOTAVAIL;
551 return error;
552 }
553 }
554
555 if (ifp != NULL) {
556 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp);
557 if_put(ifp, &psref);
558 } else
559 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim_rt(in6p);
560 curlwp_bindx(bound);
561
562 if (in6_pcblookup_connect(in6p->in6p_table, &sin6->sin6_addr,
563 sin6->sin6_port,
564 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? in6a : &in6p->in6p_laddr,
565 in6p->in6p_lport, 0, &vestige)
566 || vestige.valid)
567 return (EADDRINUSE);
568 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ||
569 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) &&
570 in6p->in6p_laddr.s6_addr32[3] == 0))
571 {
572 if (in6p->in6p_lport == 0) {
573 error = in6_pcbbind(in6p, NULL, l);
574 if (error != 0)
575 return error;
576 }
577 in6p->in6p_laddr = *in6a;
578 }
579 in6p->in6p_faddr = sin6->sin6_addr;
580 in6p->in6p_fport = sin6->sin6_port;
581
582 /* Late bind, if needed */
583 if (in6p->in6p_bindportonsend) {
584 struct sockaddr_in6 lsin = *((const struct sockaddr_in6 *)
585 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any);
586 lsin.sin6_addr = in6p->in6p_laddr;
587 lsin.sin6_port = 0;
588
589 if ((error = in6_pcbbind_port(in6p, &lsin, l)) != 0)
590 return error;
591 }
592
593 in6_pcbstate(in6p, IN6P_CONNECTED);
594 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
595 if (ip6_auto_flowlabel)
596 in6p->in6p_flowinfo |=
597 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
598#if defined(IPSEC)
599 if (ipsec_enabled && in6p->in6p_socket->so_type == SOCK_STREAM)
600 ipsec_pcbconn(in6p->in6p_sp);
601#endif
602 return (0);
603}
604
605void
606in6_pcbdisconnect(struct in6pcb *in6p)
607{
608 memset((void *)&in6p->in6p_faddr, 0, sizeof(in6p->in6p_faddr));
609 in6p->in6p_fport = 0;
610 in6_pcbstate(in6p, IN6P_BOUND);
611 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
612#if defined(IPSEC)
613 if (ipsec_enabled)
614 ipsec_pcbdisconn(in6p->in6p_sp);
615#endif
616 if (in6p->in6p_socket->so_state & SS_NOFDREF)
617 in6_pcbdetach(in6p);
618}
619
620void
621in6_pcbdetach(struct in6pcb *in6p)
622{
623 struct socket *so = in6p->in6p_socket;
624 int s;
625
626 if (in6p->in6p_af != AF_INET6)
627 return;
628
629#if defined(IPSEC)
630 if (ipsec_enabled)
631 ipsec6_delete_pcbpolicy(in6p);
632#endif
633 so->so_pcb = NULL;
634
635 s = splnet();
636 in6_pcbstate(in6p, IN6P_ATTACHED);
637 LIST_REMOVE(&in6p->in6p_head, inph_lhash);
638 TAILQ_REMOVE(&in6p->in6p_table->inpt_queue, &in6p->in6p_head,
639 inph_queue);
640 splx(s);
641
642 if (in6p->in6p_options) {
643 m_freem(in6p->in6p_options);
644 }
645 if (in6p->in6p_outputopts != NULL) {
646 ip6_clearpktopts(in6p->in6p_outputopts, -1);
647 free(in6p->in6p_outputopts, M_IP6OPT);
648 }
649 rtcache_free(&in6p->in6p_route);
650 ip6_freemoptions(in6p->in6p_moptions);
651 ip_freemoptions(in6p->in6p_v4moptions);
652 sofree(so); /* drops the socket's lock */
653
654 pool_put(&in6pcb_pool, in6p);
655 mutex_enter(softnet_lock); /* reacquire it */
656}
657
658void
659in6_setsockaddr(struct in6pcb *in6p, struct sockaddr_in6 *sin6)
660{
661
662 if (in6p->in6p_af != AF_INET6)
663 return;
664
665 sockaddr_in6_init(sin6, &in6p->in6p_laddr, in6p->in6p_lport, 0, 0);
666 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
667}
668
669void
670in6_setpeeraddr(struct in6pcb *in6p, struct sockaddr_in6 *sin6)
671{
672
673 if (in6p->in6p_af != AF_INET6)
674 return;
675
676 sockaddr_in6_init(sin6, &in6p->in6p_faddr, in6p->in6p_fport, 0, 0);
677 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
678}
679
680/*
681 * Pass some notification to all connections of a protocol
682 * associated with address dst. The local address and/or port numbers
683 * may be specified to limit the search. The "usual action" will be
684 * taken, depending on the ctlinput cmd. The caller must filter any
685 * cmds that are uninteresting (e.g., no error in the map).
686 * Call the protocol specific routine (if any) to report
687 * any errors for each matching socket.
688 *
689 * Must be called at splsoftnet.
690 *
691 * Note: src (4th arg) carries the flowlabel value on the original IPv6
692 * header, in sin6_flowinfo member.
693 */
694int
695in6_pcbnotify(struct inpcbtable *table, const struct sockaddr *dst,
696 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, int cmd,
697 void *cmdarg, void (*notify)(struct in6pcb *, int))
698{
699 struct rtentry *rt;
700 struct inpcb_hdr *inph, *ninph;
701 struct sockaddr_in6 sa6_src;
702 const struct sockaddr_in6 *sa6_dst;
703 u_int16_t fport = fport_arg, lport = lport_arg;
704 int errno;
705 int nmatch = 0;
706 u_int32_t flowinfo;
707
708 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
709 return 0;
710
711 sa6_dst = (const struct sockaddr_in6 *)dst;
712 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
713 return 0;
714
715 /*
716 * note that src can be NULL when we get notify by local fragmentation.
717 */
718 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
719 flowinfo = sa6_src.sin6_flowinfo;
720
721 /*
722 * Redirects go to all references to the destination,
723 * and use in6_rtchange to invalidate the route cache.
724 * Dead host indications: also use in6_rtchange to invalidate
725 * the cache, and deliver the error to all the sockets.
726 * Otherwise, if we have knowledge of the local port and address,
727 * deliver only to that socket.
728 */
729 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
730 fport = 0;
731 lport = 0;
732 memset((void *)&sa6_src.sin6_addr, 0, sizeof(sa6_src.sin6_addr));
733
734 if (cmd != PRC_HOSTDEAD)
735 notify = in6_rtchange;
736 }
737
738 errno = inet6ctlerrmap[cmd];
739 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) {
740 struct in6pcb *in6p = (struct in6pcb *)inph;
741 if (in6p->in6p_af != AF_INET6)
742 continue;
743
744 /*
745 * Under the following condition, notify of redirects
746 * to the pcb, without making address matches against inpcb.
747 * - redirect notification is arrived.
748 * - the inpcb is unconnected.
749 * - the inpcb is caching !RTF_HOST routing entry.
750 * - the ICMPv6 notification is from the gateway cached in the
751 * inpcb. i.e. ICMPv6 notification is from nexthop gateway
752 * the inpcb used very recently.
753 *
754 * This is to improve interaction between netbsd/openbsd
755 * redirect handling code, and inpcb route cache code.
756 * without the clause, !RTF_HOST routing entry (which carries
757 * gateway used by inpcb right before the ICMPv6 redirect)
758 * will be cached forever in unconnected inpcb.
759 *
760 * There still is a question regarding to what is TRT:
761 * - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be
762 * generated on packet output. inpcb will always cache
763 * RTF_HOST routing entry so there's no need for the clause
764 * (ICMPv6 redirect will update RTF_HOST routing entry,
765 * and inpcb is caching it already).
766 * However, bsdi/freebsd are vulnerable to local DoS attacks
767 * due to the cloned routing entries.
768 * - Specwise, "destination cache" is mentioned in RFC2461.
769 * Jinmei says that it implies bsdi/freebsd behavior, itojun
770 * is not really convinced.
771 * - Having hiwat/lowat on # of cloned host route (redirect/
772 * pmtud) may be a good idea. netbsd/openbsd has it. see
773 * icmp6_mtudisc_update().
774 */
775 if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) &&
776 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
777 (rt = rtcache_validate(&in6p->in6p_route)) != NULL &&
778 !(rt->rt_flags & RTF_HOST)) {
779 const struct sockaddr_in6 *dst6;
780
781 dst6 = (const struct sockaddr_in6 *)
782 rtcache_getdst(&in6p->in6p_route);
783 if (dst6 == NULL)
784 ;
785 else if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr,
786 &sa6_dst->sin6_addr))
787 goto do_notify;
788 }
789
790 /*
791 * If the error designates a new path MTU for a destination
792 * and the application (associated with this socket) wanted to
793 * know the value, notify. Note that we notify for all
794 * disconnected sockets if the corresponding application
795 * wanted. This is because some UDP applications keep sending
796 * sockets disconnected.
797 * XXX: should we avoid to notify the value to TCP sockets?
798 */
799 if (cmd == PRC_MSGSIZE && (in6p->in6p_flags & IN6P_MTU) != 0 &&
800 (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) ||
801 IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &sa6_dst->sin6_addr))) {
802 ip6_notify_pmtu(in6p, (const struct sockaddr_in6 *)dst,
803 (u_int32_t *)cmdarg);
804 }
805
806 /*
807 * Detect if we should notify the error. If no source and
808 * destination ports are specified, but non-zero flowinfo and
809 * local address match, notify the error. This is the case
810 * when the error is delivered with an encrypted buffer
811 * by ESP. Otherwise, just compare addresses and ports
812 * as usual.
813 */
814 if (lport == 0 && fport == 0 && flowinfo &&
815 in6p->in6p_socket != NULL &&
816 flowinfo == (in6p->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
817 IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &sa6_src.sin6_addr))
818 goto do_notify;
819 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
820 &sa6_dst->sin6_addr) ||
821 in6p->in6p_socket == NULL ||
822 (lport && in6p->in6p_lport != lport) ||
823 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
824 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
825 &sa6_src.sin6_addr)) ||
826 (fport && in6p->in6p_fport != fport))
827 continue;
828
829 do_notify:
830 if (notify)
831 (*notify)(in6p, errno);
832 nmatch++;
833 }
834 return nmatch;
835}
836
837void
838in6_pcbpurgeif0(struct inpcbtable *table, struct ifnet *ifp)
839{
840 struct inpcb_hdr *inph, *ninph;
841 struct ip6_moptions *im6o;
842 struct in6_multi_mship *imm, *nimm;
843
844 KASSERT(ifp != NULL);
845
846 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) {
847 struct in6pcb *in6p = (struct in6pcb *)inph;
848 if (in6p->in6p_af != AF_INET6)
849 continue;
850
851 im6o = in6p->in6p_moptions;
852 if (im6o) {
853 /*
854 * Unselect the outgoing interface if it is being
855 * detached.
856 */
857 if (im6o->im6o_multicast_if_index == ifp->if_index)
858 im6o->im6o_multicast_if_index = 0;
859
860 /*
861 * Drop multicast group membership if we joined
862 * through the interface being detached.
863 * XXX controversial - is it really legal for kernel
864 * to force this?
865 */
866 for (imm = im6o->im6o_memberships.lh_first;
867 imm != NULL; imm = nimm) {
868 nimm = imm->i6mm_chain.le_next;
869 if (imm->i6mm_maddr->in6m_ifp == ifp) {
870 LIST_REMOVE(imm, i6mm_chain);
871 in6_leavegroup(imm);
872 }
873 }
874 }
875 in_purgeifmcast(in6p->in6p_v4moptions, ifp);
876 }
877}
878
879void
880in6_pcbpurgeif(struct inpcbtable *table, struct ifnet *ifp)
881{
882 struct rtentry *rt;
883 struct inpcb_hdr *inph, *ninph;
884
885 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) {
886 struct in6pcb *in6p = (struct in6pcb *)inph;
887 if (in6p->in6p_af != AF_INET6)
888 continue;
889 if ((rt = rtcache_validate(&in6p->in6p_route)) != NULL &&
890 rt->rt_ifp == ifp)
891 in6_rtchange(in6p, 0);
892 }
893}
894
895/*
896 * Check for alternatives when higher level complains
897 * about service problems. For now, invalidate cached
898 * routing information. If the route was created dynamically
899 * (by a redirect), time to try a default gateway again.
900 */
901void
902in6_losing(struct in6pcb *in6p)
903{
904 struct rtentry *rt;
905 struct rt_addrinfo info;
906
907 if (in6p->in6p_af != AF_INET6)
908 return;
909
910 if ((rt = rtcache_validate(&in6p->in6p_route)) == NULL)
911 return;
912
913 memset(&info, 0, sizeof(info));
914 info.rti_info[RTAX_DST] = rtcache_getdst(&in6p->in6p_route);
915 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
916 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
917 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
918 if (rt->rt_flags & RTF_DYNAMIC) {
919 (void)rtrequest(RTM_DELETE, rt_getkey(rt),
920 rt->rt_gateway, rt_mask(rt), rt->rt_flags, NULL);
921 }
922 /*
923 * A new route can be allocated
924 * the next time output is attempted.
925 */
926 rtcache_free(&in6p->in6p_route);
927}
928
929/*
930 * After a routing change, flush old routing. A new route can be
931 * allocated the next time output is attempted.
932 */
933void
934in6_rtchange(struct in6pcb *in6p, int errno)
935{
936 if (in6p->in6p_af != AF_INET6)
937 return;
938
939 rtcache_free(&in6p->in6p_route);
940 /*
941 * A new route can be allocated the next time
942 * output is attempted.
943 */
944}
945
946struct in6pcb *
947in6_pcblookup_port(struct inpcbtable *table, struct in6_addr *laddr6,
948 u_int lport_arg, int lookup_wildcard, struct vestigial_inpcb *vp)
949{
950 struct inpcbhead *head;
951 struct inpcb_hdr *inph;
952 struct in6pcb *in6p, *match = NULL;
953 int matchwild = 3, wildcard;
954 u_int16_t lport = lport_arg;
955
956 if (vp)
957 vp->valid = 0;
958
959 head = IN6PCBHASH_PORT(table, lport);
960 LIST_FOREACH(inph, head, inph_lhash) {
961 in6p = (struct in6pcb *)inph;
962 if (in6p->in6p_af != AF_INET6)
963 continue;
964
965 if (in6p->in6p_lport != lport)
966 continue;
967 wildcard = 0;
968 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) {
969 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
970 continue;
971 }
972 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr))
973 wildcard++;
974 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) {
975 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
976 continue;
977 if (!IN6_IS_ADDR_V4MAPPED(laddr6))
978 continue;
979
980 /* duplicate of IPv4 logic */
981 wildcard = 0;
982 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) &&
983 in6p->in6p_faddr.s6_addr32[3])
984 wildcard++;
985 if (!in6p->in6p_laddr.s6_addr32[3]) {
986 if (laddr6->s6_addr32[3])
987 wildcard++;
988 } else {
989 if (!laddr6->s6_addr32[3])
990 wildcard++;
991 else {
992 if (in6p->in6p_laddr.s6_addr32[3] !=
993 laddr6->s6_addr32[3])
994 continue;
995 }
996 }
997 } else if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
998 if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
999 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
1000 continue;
1001 }
1002 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6))
1003 wildcard++;
1004 } else {
1005 if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
1006 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
1007 continue;
1008 }
1009 if (IN6_IS_ADDR_UNSPECIFIED(laddr6))
1010 wildcard++;
1011 else {
1012 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
1013 laddr6))
1014 continue;
1015 }
1016 }
1017 if (wildcard && !lookup_wildcard)
1018 continue;
1019 if (wildcard < matchwild) {
1020 match = in6p;
1021 matchwild = wildcard;
1022 if (matchwild == 0)
1023 break;
1024 }
1025 }
1026 if (match && matchwild == 0)
1027 return match;
1028
1029 if (vp && table->vestige && table->vestige->init_ports6) {
1030 struct vestigial_inpcb better;
1031 void *state;
1032
1033 state = (*table->vestige->init_ports6)(laddr6,
1034 lport_arg,
1035 lookup_wildcard);
1036 while (table->vestige
1037 && (*table->vestige->next_port6)(state, vp)) {
1038
1039 if (vp->lport != lport)
1040 continue;
1041 wildcard = 0;
1042 if (!IN6_IS_ADDR_UNSPECIFIED(&vp->faddr.v6))
1043 wildcard++;
1044 if (IN6_IS_ADDR_UNSPECIFIED(&vp->laddr.v6)) {
1045 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6))
1046 wildcard++;
1047 } else {
1048 if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
1049 if (vp->v6only)
1050 continue;
1051 }
1052 if (IN6_IS_ADDR_UNSPECIFIED(laddr6))
1053 wildcard++;
1054 else {
1055 if (!IN6_ARE_ADDR_EQUAL(&vp->laddr.v6, laddr6))
1056 continue;
1057 }
1058 }
1059 if (wildcard && !lookup_wildcard)
1060 continue;
1061 if (wildcard < matchwild) {
1062 better = *vp;
1063 match = (void*)&better;
1064
1065 matchwild = wildcard;
1066 if (matchwild == 0)
1067 break;
1068 }
1069 }
1070
1071 if (match) {
1072 if (match != (void*)&better)
1073 return match;
1074 else {
1075 *vp = better;
1076 return 0;
1077 }
1078 }
1079 }
1080 return (match);
1081}
1082
1083/*
1084 * WARNING: return value (rtentry) could be IPv4 one if in6pcb is connected to
1085 * IPv4 mapped address.
1086 */
1087struct rtentry *
1088in6_pcbrtentry(struct in6pcb *in6p)
1089{
1090 struct rtentry *rt;
1091 struct route *ro;
1092 union {
1093 const struct sockaddr *sa;
1094 const struct sockaddr_in6 *sa6;
1095#ifdef INET
1096 const struct sockaddr_in *sa4;
1097#endif
1098 } cdst;
1099
1100 ro = &in6p->in6p_route;
1101
1102 if (in6p->in6p_af != AF_INET6)
1103 return (NULL);
1104
1105 cdst.sa = rtcache_getdst(ro);
1106 if (cdst.sa == NULL)
1107 ;
1108#ifdef INET
1109 else if (cdst.sa->sa_family == AF_INET) {
1110 KASSERT(IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr));
1111 if (cdst.sa4->sin_addr.s_addr != in6p->in6p_faddr.s6_addr32[3])
1112 rtcache_free(ro);
1113 }
1114#endif
1115 else {
1116 if (!IN6_ARE_ADDR_EQUAL(&cdst.sa6->sin6_addr,
1117 &in6p->in6p_faddr))
1118 rtcache_free(ro);
1119 }
1120 if ((rt = rtcache_validate(ro)) == NULL)
1121 rt = rtcache_update(ro, 1);
1122#ifdef INET
1123 if (rt == NULL && IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) {
1124 union {
1125 struct sockaddr dst;
1126 struct sockaddr_in dst4;
1127 } u;
1128 struct in_addr addr;
1129
1130 addr.s_addr = in6p->in6p_faddr.s6_addr32[3];
1131
1132 sockaddr_in_init(&u.dst4, &addr, 0);
1133 if (rtcache_setdst(ro, &u.dst) != 0)
1134 return NULL;
1135
1136 rt = rtcache_init(ro);
1137 } else
1138#endif
1139 if (rt == NULL && !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1140 union {
1141 struct sockaddr dst;
1142 struct sockaddr_in6 dst6;
1143 } u;
1144
1145 sockaddr_in6_init(&u.dst6, &in6p->in6p_faddr, 0, 0, 0);
1146 if (rtcache_setdst(ro, &u.dst) != 0)
1147 return NULL;
1148
1149 rt = rtcache_init(ro);
1150 }
1151 return rt;
1152}
1153
1154struct in6pcb *
1155in6_pcblookup_connect(struct inpcbtable *table, const struct in6_addr *faddr6,
1156 u_int fport_arg, const struct in6_addr *laddr6, u_int lport_arg,
1157 int faith,
1158 struct vestigial_inpcb *vp)
1159{
1160 struct inpcbhead *head;
1161 struct inpcb_hdr *inph;
1162 struct in6pcb *in6p;
1163 u_int16_t fport = fport_arg, lport = lport_arg;
1164
1165 if (vp)
1166 vp->valid = 0;
1167
1168 head = IN6PCBHASH_CONNECT(table, faddr6, fport, laddr6, lport);
1169 LIST_FOREACH(inph, head, inph_hash) {
1170 in6p = (struct in6pcb *)inph;
1171 if (in6p->in6p_af != AF_INET6)
1172 continue;
1173
1174 /* find exact match on both source and dest */
1175 if (in6p->in6p_fport != fport)
1176 continue;
1177 if (in6p->in6p_lport != lport)
1178 continue;
1179 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr))
1180 continue;
1181 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6))
1182 continue;
1183 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
1184 continue;
1185 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6))
1186 continue;
1187 if ((IN6_IS_ADDR_V4MAPPED(laddr6) ||
1188 IN6_IS_ADDR_V4MAPPED(faddr6)) &&
1189 (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1190 continue;
1191 return in6p;
1192 }
1193 if (vp && table->vestige) {
1194 if ((*table->vestige->lookup6)(faddr6, fport_arg,
1195 laddr6, lport_arg, vp))
1196 return NULL;
1197 }
1198
1199 return NULL;
1200}
1201
1202struct in6pcb *
1203in6_pcblookup_bind(struct inpcbtable *table, const struct in6_addr *laddr6,
1204 u_int lport_arg, int faith)
1205{
1206 struct inpcbhead *head;
1207 struct inpcb_hdr *inph;
1208 struct in6pcb *in6p;
1209 u_int16_t lport = lport_arg;
1210#ifdef INET
1211 struct in6_addr zero_mapped;
1212#endif
1213
1214 head = IN6PCBHASH_BIND(table, laddr6, lport);
1215 LIST_FOREACH(inph, head, inph_hash) {
1216 in6p = (struct in6pcb *)inph;
1217 if (in6p->in6p_af != AF_INET6)
1218 continue;
1219
1220 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
1221 continue;
1222 if (in6p->in6p_fport != 0)
1223 continue;
1224 if (in6p->in6p_lport != lport)
1225 continue;
1226 if (IN6_IS_ADDR_V4MAPPED(laddr6) &&
1227 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
1228 continue;
1229 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6))
1230 goto out;
1231 }
1232#ifdef INET
1233 if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
1234 memset(&zero_mapped, 0, sizeof(zero_mapped));
1235 zero_mapped.s6_addr16[5] = 0xffff;
1236 head = IN6PCBHASH_BIND(table, &zero_mapped, lport);
1237 LIST_FOREACH(inph, head, inph_hash) {
1238 in6p = (struct in6pcb *)inph;
1239 if (in6p->in6p_af != AF_INET6)
1240 continue;
1241
1242 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
1243 continue;
1244 if (in6p->in6p_fport != 0)
1245 continue;
1246 if (in6p->in6p_lport != lport)
1247 continue;
1248 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
1249 continue;
1250 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zero_mapped))
1251 goto out;
1252 }
1253 }
1254#endif
1255 head = IN6PCBHASH_BIND(table, &zeroin6_addr, lport);
1256 LIST_FOREACH(inph, head, inph_hash) {
1257 in6p = (struct in6pcb *)inph;
1258 if (in6p->in6p_af != AF_INET6)
1259 continue;
1260
1261 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
1262 continue;
1263 if (in6p->in6p_fport != 0)
1264 continue;
1265 if (in6p->in6p_lport != lport)
1266 continue;
1267 if (IN6_IS_ADDR_V4MAPPED(laddr6) &&
1268 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
1269 continue;
1270 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zeroin6_addr))
1271 goto out;
1272 }
1273 return (NULL);
1274
1275out:
1276 inph = &in6p->in6p_head;
1277 if (inph != LIST_FIRST(head)) {
1278 LIST_REMOVE(inph, inph_hash);
1279 LIST_INSERT_HEAD(head, inph, inph_hash);
1280 }
1281 return in6p;
1282}
1283
1284void
1285in6_pcbstate(struct in6pcb *in6p, int state)
1286{
1287
1288 if (in6p->in6p_af != AF_INET6)
1289 return;
1290
1291 if (in6p->in6p_state > IN6P_ATTACHED)
1292 LIST_REMOVE(&in6p->in6p_head, inph_hash);
1293
1294 switch (state) {
1295 case IN6P_BOUND:
1296 LIST_INSERT_HEAD(IN6PCBHASH_BIND(in6p->in6p_table,
1297 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head,
1298 inph_hash);
1299 break;
1300 case IN6P_CONNECTED:
1301 LIST_INSERT_HEAD(IN6PCBHASH_CONNECT(in6p->in6p_table,
1302 &in6p->in6p_faddr, in6p->in6p_fport,
1303 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head,
1304 inph_hash);
1305 break;
1306 }
1307
1308 in6p->in6p_state = state;
1309}
1310