in6_pcb.c revision 1.123.2.3 1 /* $NetBSD: in6_pcb.c,v 1.123.2.3 2014/05/18 17:46:13 rmind 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 1.123.2.3 2014/05/18 17:46:13 rmind Exp $");
66
67 #include "opt_inet.h"
68 #include "opt_ipsec.h"
69
70 #include <sys/param.h>
71 #include <sys/systm.h>
72 #include <sys/malloc.h>
73 #include <sys/mbuf.h>
74 #include <sys/protosw.h>
75 #include <sys/socket.h>
76 #include <sys/socketvar.h>
77 #include <sys/ioctl.h>
78 #include <sys/errno.h>
79 #include <sys/time.h>
80 #include <sys/proc.h>
81 #include <sys/kauth.h>
82 #include <sys/domain.h>
83 #include <sys/once.h>
84
85 #include <net/if.h>
86 #include <net/route.h>
87
88 #include <netinet/in.h>
89 #include <netinet/in_var.h>
90 #include <netinet/in_systm.h>
91 #include <netinet/ip.h>
92 #include <netinet/ip6.h>
93 #include <netinet/portalgo.h>
94 #include <netinet6/ip6_var.h>
95 #define __INPCB_PRIVATE
96 #include <netinet6/in6_pcb.h>
97 #include <netinet6/scope6_var.h>
98 #include <netinet6/nd6.h>
99
100 #include "faith.h"
101
102 #ifdef IPSEC
103 #include <netipsec/ipsec.h>
104 #include <netipsec/ipsec6.h>
105 #include <netipsec/key.h>
106 #endif /* IPSEC */
107
108 #include <netinet/tcp_vtw.h>
109
110 const struct in6_addr zeroin6_addr;
111
112 #define IN6PCBHASH_PORT(table, lport) \
113 &(table)->inpt_porthashtbl[ntohs(lport) & (table)->inpt_porthash]
114 #define IN6PCBHASH_BIND(table, laddr, lport) \
115 &(table)->inpt_bindhashtbl[ \
116 (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \
117 (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + ntohs(lport)) & \
118 (table)->inpt_bindhash]
119 #define IN6PCBHASH_CONNECT(table, faddr, fport, laddr, lport) \
120 &(table)->inpt_bindhashtbl[ \
121 ((((faddr)->s6_addr32[0] ^ (faddr)->s6_addr32[1] ^ \
122 (faddr)->s6_addr32[2] ^ (faddr)->s6_addr32[3]) + ntohs(fport)) + \
123 (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \
124 (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + \
125 ntohs(lport))) & (table)->inpt_bindhash]
126
127 int ip6_anonportmin = IPV6PORT_ANONMIN;
128 int ip6_anonportmax = IPV6PORT_ANONMAX;
129 int ip6_lowportmin = IPV6PORT_RESERVEDMIN;
130 int ip6_lowportmax = IPV6PORT_RESERVEDMAX;
131
132 static struct pool in6pcb_pool;
133
134 static int
135 in6pcb_poolinit(void)
136 {
137
138 pool_init(&in6pcb_pool, sizeof(struct in6pcb), 0, 0, 0, "in6pcbpl",
139 NULL, IPL_SOFTNET);
140 return 0;
141 }
142
143 inpcbtable_t *
144 in6_pcbinit(size_t bindhashsize, size_t connecthashsize, int flags)
145 {
146 static ONCE_DECL(control);
147 inpcbtable_t *inpt;
148
149 RUN_ONCE(&control, in6pcb_poolinit);
150 inpt = inpcb_init(bindhashsize, connecthashsize, flags);
151 inpt->inpt_lastport = (u_int16_t)ip6_anonportmax;
152 return inpt;
153 }
154
155 int
156 in6_pcballoc(struct socket *so, void *v)
157 {
158 struct inpcbtable *table = v;
159 struct in6pcb *in6p;
160 int s;
161 #if defined(IPSEC)
162 int error;
163 #endif
164
165 s = splnet();
166 in6p = pool_get(&in6pcb_pool, PR_NOWAIT);
167 splx(s);
168 if (in6p == NULL)
169 return (ENOBUFS);
170 memset((void *)in6p, 0, sizeof(*in6p));
171 in6p->in6p_af = AF_INET6;
172 in6p->in6p_table = table;
173 in6p->in6p_socket = so;
174 in6p->in6p_hops = -1; /* use kernel default */
175 in6p->in6p_icmp6filt = NULL;
176 in6p->in6p_portalgo = PORTALGO_DEFAULT;
177 in6p->in6p_bindportonsend = false;
178 #if defined(IPSEC)
179 error = ipsec_init_pcbpolicy(so, &in6p->in6p_sp);
180 if (error != 0) {
181 s = splnet();
182 pool_put(&in6pcb_pool, in6p);
183 splx(s);
184 return error;
185 }
186 #endif /* IPSEC */
187 s = splnet();
188 TAILQ_INSERT_HEAD(&table->inpt_queue, (struct inpcb_hdr*)in6p,
189 inph_queue);
190 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport),
191 &in6p->in6p_head, inph_lhash);
192 in6_pcbstate(in6p, IN6P_ATTACHED);
193 splx(s);
194 if (ip6_v6only)
195 in6p->in6p_flags |= IN6P_IPV6_V6ONLY;
196 so->so_pcb = (void *)in6p;
197 return (0);
198 }
199
200 /*
201 * Bind address from sin6 to in6p.
202 */
203 static int
204 in6_pcbbind_addr(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l)
205 {
206 int error;
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 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
224 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
225 return (EINVAL);
226 if (sin6->sin6_addr.s6_addr32[3]) {
227 struct sockaddr_in sin;
228
229 memset(&sin, 0, sizeof(sin));
230 sin.sin_len = sizeof(sin);
231 sin.sin_family = AF_INET;
232 bcopy(&sin6->sin6_addr.s6_addr32[3],
233 &sin.sin_addr, sizeof(sin.sin_addr));
234 if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0)
235 return EADDRNOTAVAIL;
236 }
237 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
238 struct ifaddr *ia = NULL;
239
240 if ((in6p->in6p_flags & IN6P_FAITH) == 0 &&
241 (ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
242 return (EADDRNOTAVAIL);
243
244 /*
245 * bind to an anycast address might accidentally
246 * cause sending a packet with an anycast source
247 * address, so we forbid it.
248 *
249 * We should allow to bind to a deprecated address,
250 * since the application dare to use it.
251 * But, can we assume that they are careful enough
252 * to check if the address is deprecated or not?
253 * Maybe, as a safeguard, we should have a setsockopt
254 * flag to control the bind(2) behavior against
255 * deprecated addresses (default: forbid bind(2)).
256 */
257 if (ia &&
258 ((struct in6_ifaddr *)ia)->ia6_flags &
259 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED))
260 return (EADDRNOTAVAIL);
261 }
262
263
264 in6p->in6p_laddr = sin6->sin6_addr;
265
266
267 return (0);
268 }
269
270 /*
271 * Bind port from sin6 to in6p.
272 */
273 static int
274 in6_pcbbind_port(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l)
275 {
276 struct inpcbtable *table = in6p->in6p_table;
277 struct socket *so = in6p->in6p_socket;
278 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
279 int error;
280
281 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 &&
282 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 ||
283 (so->so_options & SO_ACCEPTCONN) == 0))
284 wild = 1;
285
286 if (sin6->sin6_port != 0) {
287 enum kauth_network_req req;
288
289 #ifndef IPNOPRIVPORTS
290 if (ntohs(sin6->sin6_port) < IPV6PORT_RESERVED)
291 req = KAUTH_REQ_NETWORK_BIND_PRIVPORT;
292 else
293 #endif /* IPNOPRIVPORTS */
294 req = KAUTH_REQ_NETWORK_BIND_PORT;
295
296 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_BIND,
297 req, so, sin6, NULL);
298 if (error)
299 return (EACCES);
300 }
301
302 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
303 /*
304 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
305 * allow compepte duplication of binding if
306 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
307 * and a multicast address is bound on both
308 * new and duplicated sockets.
309 */
310 if (so->so_options & SO_REUSEADDR)
311 reuseport = SO_REUSEADDR|SO_REUSEPORT;
312 }
313
314 if (sin6->sin6_port != 0) {
315 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
316 #ifdef INET
317 struct inpcb *t;
318 struct vestigial_inpcb vestige;
319
320 t = inpcb_lookup_local(table,
321 *(struct in_addr *)&sin6->sin6_addr.s6_addr32[3],
322 sin6->sin6_port, wild, &vestige);
323 if (t && (reuseport & t->inp_socket->so_options) == 0)
324 return (EADDRINUSE);
325 if (!t
326 && vestige.valid
327 && !(reuseport && vestige.reuse_port))
328 return EADDRINUSE;
329 #else
330 return (EADDRNOTAVAIL);
331 #endif
332 }
333
334 {
335 struct in6pcb *t;
336 struct vestigial_inpcb vestige;
337
338 t = in6_pcblookup_port(table, &sin6->sin6_addr,
339 sin6->sin6_port, wild, &vestige);
340 if (t && (reuseport & t->in6p_socket->so_options) == 0)
341 return (EADDRINUSE);
342 if (!t
343 && vestige.valid
344 && !(reuseport && vestige.reuse_port))
345 return EADDRINUSE;
346 }
347 }
348
349 if (sin6->sin6_port == 0) {
350 int e;
351 e = in6_pcbsetport(sin6, in6p, l);
352 if (e != 0)
353 return (e);
354 } else {
355 in6p->in6p_lport = sin6->sin6_port;
356 in6_pcbstate(in6p, IN6P_BOUND);
357 }
358
359 LIST_REMOVE(&in6p->in6p_head, inph_lhash);
360 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport),
361 &in6p->in6p_head, inph_lhash);
362
363 return (0);
364 }
365
366 int
367 in6_pcbbind(void *v, struct mbuf *nam, struct lwp *l)
368 {
369 struct in6pcb *in6p = v;
370 struct sockaddr_in6 lsin6;
371 struct sockaddr_in6 *sin6 = NULL;
372 int error;
373
374 if (in6p->in6p_af != AF_INET6)
375 return (EINVAL);
376
377 /*
378 * If we already have a local port or a local address it means we're
379 * bounded.
380 */
381 if (in6p->in6p_lport || !(IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ||
382 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) &&
383 in6p->in6p_laddr.s6_addr32[3] == 0)))
384 return (EINVAL);
385
386 if (nam != NULL) {
387 /* We were provided a sockaddr_in6 to use. */
388 sin6 = mtod(nam, struct sockaddr_in6 *);
389 if (nam->m_len != sizeof(*sin6))
390 return (EINVAL);
391 } else {
392 /* We always bind to *something*, even if it's "anything". */
393 lsin6 = *((const struct sockaddr_in6 *)
394 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any);
395 sin6 = &lsin6;
396 }
397
398 /* Bind address. */
399 error = in6_pcbbind_addr(in6p, sin6, l);
400 if (error)
401 return (error);
402
403 /* Bind port. */
404 error = in6_pcbbind_port(in6p, sin6, l);
405 if (error) {
406 /*
407 * Reset the address here to "any" so we don't "leak" the
408 * in6pcb.
409 */
410 in6p->in6p_laddr = in6addr_any;
411
412 return (error);
413 }
414
415
416 #if 0
417 in6p->in6p_flowinfo = 0; /* XXX */
418 #endif
419 return (0);
420 }
421
422 /*
423 * Connect from a socket to a specified address.
424 * Both address and port must be specified in argument sin6.
425 * If don't have a local address for this socket yet,
426 * then pick one.
427 */
428 int
429 in6_pcbconnect(void *v, struct mbuf *nam, struct lwp *l)
430 {
431 struct rtentry *rt;
432 struct in6pcb *in6p = v;
433 struct in6_addr *in6a = NULL;
434 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *);
435 struct ifnet *ifp = NULL; /* outgoing interface */
436 int error = 0;
437 int scope_ambiguous = 0;
438 #ifdef INET
439 struct in6_addr mapped;
440 #endif
441 struct sockaddr_in6 tmp;
442 struct vestigial_inpcb vestige;
443
444 (void)&in6a; /* XXX fool gcc */
445
446 if (in6p->in6p_af != AF_INET6)
447 return (EINVAL);
448
449 if (nam->m_len != sizeof(*sin6))
450 return (EINVAL);
451 if (sin6->sin6_family != AF_INET6)
452 return (EAFNOSUPPORT);
453 if (sin6->sin6_port == 0)
454 return (EADDRNOTAVAIL);
455
456 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
457 in6p->in6p_socket->so_type == SOCK_STREAM)
458 return EADDRNOTAVAIL;
459
460 if (sin6->sin6_scope_id == 0 && !ip6_use_defzone)
461 scope_ambiguous = 1;
462 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0)
463 return(error);
464
465 /* sanity check for mapped address case */
466 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
467 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
468 return EINVAL;
469 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
470 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff);
471 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr))
472 return EINVAL;
473 } else
474 {
475 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr))
476 return EINVAL;
477 }
478
479 /* protect *sin6 from overwrites */
480 tmp = *sin6;
481 sin6 = &tmp;
482
483 /* Source address selection. */
484 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) &&
485 in6p->in6p_laddr.s6_addr32[3] == 0) {
486 #ifdef INET
487 struct sockaddr_in sin, *sinp;
488
489 memset(&sin, 0, sizeof(sin));
490 sin.sin_len = sizeof(sin);
491 sin.sin_family = AF_INET;
492 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr32[3],
493 sizeof(sin.sin_addr));
494 sinp = in_selectsrc(&sin, &in6p->in6p_route,
495 in6p->in6p_socket->so_options, NULL, &error);
496 if (sinp == 0) {
497 if (error == 0)
498 error = EADDRNOTAVAIL;
499 return (error);
500 }
501 memset(&mapped, 0, sizeof(mapped));
502 mapped.s6_addr16[5] = htons(0xffff);
503 memcpy(&mapped.s6_addr32[3], &sinp->sin_addr, sizeof(sinp->sin_addr));
504 in6a = &mapped;
505 #else
506 return EADDRNOTAVAIL;
507 #endif
508 } else {
509 /*
510 * XXX: in6_selectsrc might replace the bound local address
511 * with the address specified by setsockopt(IPV6_PKTINFO).
512 * Is it the intended behavior?
513 */
514 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts,
515 in6p->in6p_moptions,
516 &in6p->in6p_route,
517 &in6p->in6p_laddr, &ifp, &error);
518 if (ifp && scope_ambiguous &&
519 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) {
520 return(error);
521 }
522
523 if (in6a == 0) {
524 if (error == 0)
525 error = EADDRNOTAVAIL;
526 return (error);
527 }
528 }
529 if (ifp == NULL && (rt = rtcache_validate(&in6p->in6p_route)) != NULL)
530 ifp = rt->rt_ifp;
531
532 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp);
533
534 if (in6_pcblookup_connect(in6p->in6p_table, &sin6->sin6_addr,
535 sin6->sin6_port,
536 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? in6a : &in6p->in6p_laddr,
537 in6p->in6p_lport, 0, &vestige)
538 || vestige.valid)
539 return (EADDRINUSE);
540 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ||
541 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) &&
542 in6p->in6p_laddr.s6_addr32[3] == 0))
543 {
544 if (in6p->in6p_lport == 0) {
545 error = in6_pcbbind(in6p, NULL, l);
546 if (error != 0)
547 return error;
548 }
549 in6p->in6p_laddr = *in6a;
550 }
551 in6p->in6p_faddr = sin6->sin6_addr;
552 in6p->in6p_fport = sin6->sin6_port;
553
554 /* Late bind, if needed */
555 if (in6p->in6p_bindportonsend) {
556 struct sockaddr_in6 lsin = *((const struct sockaddr_in6 *)
557 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any);
558 lsin.sin6_addr = in6p->in6p_laddr;
559 lsin.sin6_port = 0;
560
561 if ((error = in6_pcbbind_port(in6p, &lsin, l)) != 0)
562 return error;
563 }
564
565 in6_pcbstate(in6p, IN6P_CONNECTED);
566 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
567 if (ip6_auto_flowlabel)
568 in6p->in6p_flowinfo |=
569 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
570 #if defined(IPSEC)
571 if (in6p->in6p_socket->so_type == SOCK_STREAM)
572 ipsec_pcbconn(in6p->in6p_sp);
573 #endif
574 return (0);
575 }
576
577 void
578 in6_pcbdisconnect(struct in6pcb *in6p)
579 {
580 memset((void *)&in6p->in6p_faddr, 0, sizeof(in6p->in6p_faddr));
581 in6p->in6p_fport = 0;
582 in6_pcbstate(in6p, IN6P_BOUND);
583 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
584 #if defined(IPSEC)
585 ipsec_pcbdisconn(in6p->in6p_sp);
586 #endif
587 if (in6p->in6p_socket->so_state & SS_NOFDREF)
588 in6_pcbdetach(in6p);
589 }
590
591 void
592 in6_pcbdetach(struct in6pcb *in6p)
593 {
594 struct socket *so = in6p->in6p_socket;
595 int s;
596
597 if (in6p->in6p_af != AF_INET6)
598 return;
599
600 #if defined(IPSEC)
601 ipsec6_delete_pcbpolicy(in6p);
602 #endif /* IPSEC */
603 so->so_pcb = 0;
604 if (in6p->in6p_options)
605 m_freem(in6p->in6p_options);
606 if (in6p->in6p_outputopts != NULL) {
607 ip6_clearpktopts(in6p->in6p_outputopts, -1);
608 free(in6p->in6p_outputopts, M_IP6OPT);
609 }
610 rtcache_free(&in6p->in6p_route);
611 ip6_freemoptions(in6p->in6p_moptions);
612 s = splnet();
613 in6_pcbstate(in6p, IN6P_ATTACHED);
614 LIST_REMOVE(&in6p->in6p_head, inph_lhash);
615 TAILQ_REMOVE(&in6p->in6p_table->inpt_queue, &in6p->in6p_head,
616 inph_queue);
617 pool_put(&in6pcb_pool, in6p);
618 splx(s);
619 sofree(so); /* drops the socket's lock */
620 mutex_enter(softnet_lock); /* reacquire it */
621 }
622
623 void
624 in6_setsockaddr(struct in6pcb *in6p, struct mbuf *nam)
625 {
626 struct sockaddr_in6 *sin6;
627
628 if (in6p->in6p_af != AF_INET6)
629 return;
630
631 nam->m_len = sizeof(*sin6);
632 sin6 = mtod(nam, struct sockaddr_in6 *);
633 sockaddr_in6_init(sin6, &in6p->in6p_laddr, in6p->in6p_lport, 0, 0);
634 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
635 }
636
637 void
638 in6_setpeeraddr(struct in6pcb *in6p, struct mbuf *nam)
639 {
640 struct sockaddr_in6 *sin6;
641
642 if (in6p->in6p_af != AF_INET6)
643 return;
644
645 nam->m_len = sizeof(*sin6);
646 sin6 = mtod(nam, struct sockaddr_in6 *);
647 sockaddr_in6_init(sin6, &in6p->in6p_faddr, in6p->in6p_fport, 0, 0);
648 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
649 }
650
651 /*
652 * Pass some notification to all connections of a protocol
653 * associated with address dst. The local address and/or port numbers
654 * may be specified to limit the search. The "usual action" will be
655 * taken, depending on the ctlinput cmd. The caller must filter any
656 * cmds that are uninteresting (e.g., no error in the map).
657 * Call the protocol specific routine (if any) to report
658 * any errors for each matching socket.
659 *
660 * Must be called at splsoftnet.
661 *
662 * Note: src (4th arg) carries the flowlabel value on the original IPv6
663 * header, in sin6_flowinfo member.
664 */
665 int
666 in6_pcbnotify(struct inpcbtable *table, const struct sockaddr *dst,
667 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, int cmd,
668 void *cmdarg, void (*notify)(struct in6pcb *, int))
669 {
670 struct rtentry *rt;
671 struct inpcb_hdr *inph, *ninph;
672 struct sockaddr_in6 sa6_src;
673 const struct sockaddr_in6 *sa6_dst;
674 u_int16_t fport = fport_arg, lport = lport_arg;
675 int errno;
676 int nmatch = 0;
677 u_int32_t flowinfo;
678
679 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
680 return 0;
681
682 sa6_dst = (const struct sockaddr_in6 *)dst;
683 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
684 return 0;
685
686 /*
687 * note that src can be NULL when we get notify by local fragmentation.
688 */
689 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
690 flowinfo = sa6_src.sin6_flowinfo;
691
692 /*
693 * Redirects go to all references to the destination,
694 * and use in6_rtchange to invalidate the route cache.
695 * Dead host indications: also use in6_rtchange to invalidate
696 * the cache, and deliver the error to all the sockets.
697 * Otherwise, if we have knowledge of the local port and address,
698 * deliver only to that socket.
699 */
700 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
701 fport = 0;
702 lport = 0;
703 memset((void *)&sa6_src.sin6_addr, 0, sizeof(sa6_src.sin6_addr));
704
705 if (cmd != PRC_HOSTDEAD)
706 notify = in6_rtchange;
707 }
708
709 errno = inet6ctlerrmap[cmd];
710 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) {
711 struct in6pcb *in6p = (struct in6pcb *)inph;
712 if (in6p->in6p_af != AF_INET6)
713 continue;
714
715 /*
716 * Under the following condition, notify of redirects
717 * to the pcb, without making address matches against inpcb.
718 * - redirect notification is arrived.
719 * - the inpcb is unconnected.
720 * - the inpcb is caching !RTF_HOST routing entry.
721 * - the ICMPv6 notification is from the gateway cached in the
722 * inpcb. i.e. ICMPv6 notification is from nexthop gateway
723 * the inpcb used very recently.
724 *
725 * This is to improve interaction between netbsd/openbsd
726 * redirect handling code, and inpcb route cache code.
727 * without the clause, !RTF_HOST routing entry (which carries
728 * gateway used by inpcb right before the ICMPv6 redirect)
729 * will be cached forever in unconnected inpcb.
730 *
731 * There still is a question regarding to what is TRT:
732 * - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be
733 * generated on packet output. inpcb will always cache
734 * RTF_HOST routing entry so there's no need for the clause
735 * (ICMPv6 redirect will update RTF_HOST routing entry,
736 * and inpcb is caching it already).
737 * However, bsdi/freebsd are vulnerable to local DoS attacks
738 * due to the cloned routing entries.
739 * - Specwise, "destination cache" is mentioned in RFC2461.
740 * Jinmei says that it implies bsdi/freebsd behavior, itojun
741 * is not really convinced.
742 * - Having hiwat/lowat on # of cloned host route (redirect/
743 * pmtud) may be a good idea. netbsd/openbsd has it. see
744 * icmp6_mtudisc_update().
745 */
746 if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) &&
747 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
748 (rt = rtcache_validate(&in6p->in6p_route)) != NULL &&
749 !(rt->rt_flags & RTF_HOST)) {
750 const struct sockaddr_in6 *dst6;
751
752 dst6 = (const struct sockaddr_in6 *)
753 rtcache_getdst(&in6p->in6p_route);
754 if (dst6 == NULL)
755 ;
756 else if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr,
757 &sa6_dst->sin6_addr))
758 goto do_notify;
759 }
760
761 /*
762 * If the error designates a new path MTU for a destination
763 * and the application (associated with this socket) wanted to
764 * know the value, notify. Note that we notify for all
765 * disconnected sockets if the corresponding application
766 * wanted. This is because some UDP applications keep sending
767 * sockets disconnected.
768 * XXX: should we avoid to notify the value to TCP sockets?
769 */
770 if (cmd == PRC_MSGSIZE && (in6p->in6p_flags & IN6P_MTU) != 0 &&
771 (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) ||
772 IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &sa6_dst->sin6_addr))) {
773 ip6_notify_pmtu(in6p, (const struct sockaddr_in6 *)dst,
774 (u_int32_t *)cmdarg);
775 }
776
777 /*
778 * Detect if we should notify the error. If no source and
779 * destination ports are specified, but non-zero flowinfo and
780 * local address match, notify the error. This is the case
781 * when the error is delivered with an encrypted buffer
782 * by ESP. Otherwise, just compare addresses and ports
783 * as usual.
784 */
785 if (lport == 0 && fport == 0 && flowinfo &&
786 in6p->in6p_socket != NULL &&
787 flowinfo == (in6p->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
788 IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &sa6_src.sin6_addr))
789 goto do_notify;
790 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
791 &sa6_dst->sin6_addr) ||
792 in6p->in6p_socket == 0 ||
793 (lport && in6p->in6p_lport != lport) ||
794 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
795 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
796 &sa6_src.sin6_addr)) ||
797 (fport && in6p->in6p_fport != fport))
798 continue;
799
800 do_notify:
801 if (notify)
802 (*notify)(in6p, errno);
803 nmatch++;
804 }
805 return nmatch;
806 }
807
808 void
809 in6_pcbpurgeif0(struct inpcbtable *table, struct ifnet *ifp)
810 {
811 struct inpcb_hdr *inph, *ninph;
812 struct ip6_moptions *im6o;
813 struct in6_multi_mship *imm, *nimm;
814
815 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) {
816 struct in6pcb *in6p = (struct in6pcb *)inph;
817 if (in6p->in6p_af != AF_INET6)
818 continue;
819
820 im6o = in6p->in6p_moptions;
821 if (im6o) {
822 /*
823 * Unselect the outgoing interface if it is being
824 * detached.
825 */
826 if (im6o->im6o_multicast_ifp == ifp)
827 im6o->im6o_multicast_ifp = NULL;
828
829 /*
830 * Drop multicast group membership if we joined
831 * through the interface being detached.
832 * XXX controversial - is it really legal for kernel
833 * to force this?
834 */
835 for (imm = im6o->im6o_memberships.lh_first;
836 imm != NULL; imm = nimm) {
837 nimm = imm->i6mm_chain.le_next;
838 if (imm->i6mm_maddr->in6m_ifp == ifp) {
839 LIST_REMOVE(imm, i6mm_chain);
840 in6_leavegroup(imm);
841 }
842 }
843 }
844 }
845 }
846
847 void
848 in6_pcbpurgeif(struct inpcbtable *table, struct ifnet *ifp)
849 {
850 struct rtentry *rt;
851 struct inpcb_hdr *inph, *ninph;
852
853 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) {
854 struct in6pcb *in6p = (struct in6pcb *)inph;
855 if (in6p->in6p_af != AF_INET6)
856 continue;
857 if ((rt = rtcache_validate(&in6p->in6p_route)) != NULL &&
858 rt->rt_ifp == ifp)
859 in6_rtchange(in6p, 0);
860 }
861 }
862
863 /*
864 * Check for alternatives when higher level complains
865 * about service problems. For now, invalidate cached
866 * routing information. If the route was created dynamically
867 * (by a redirect), time to try a default gateway again.
868 */
869 void
870 in6_losing(struct in6pcb *in6p)
871 {
872 struct rtentry *rt;
873 struct rt_addrinfo info;
874
875 if (in6p->in6p_af != AF_INET6)
876 return;
877
878 if ((rt = rtcache_validate(&in6p->in6p_route)) == NULL)
879 return;
880
881 memset(&info, 0, sizeof(info));
882 info.rti_info[RTAX_DST] = rtcache_getdst(&in6p->in6p_route);
883 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
884 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
885 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
886 if (rt->rt_flags & RTF_DYNAMIC) {
887 (void)rtrequest(RTM_DELETE, rt_getkey(rt),
888 rt->rt_gateway, rt_mask(rt), rt->rt_flags, NULL);
889 }
890 /*
891 * A new route can be allocated
892 * the next time output is attempted.
893 */
894 rtcache_free(&in6p->in6p_route);
895 }
896
897 /*
898 * After a routing change, flush old routing. A new route can be
899 * allocated the next time output is attempted.
900 */
901 void
902 in6_rtchange(struct in6pcb *in6p, int errno)
903 {
904 if (in6p->in6p_af != AF_INET6)
905 return;
906
907 rtcache_free(&in6p->in6p_route);
908 /*
909 * A new route can be allocated the next time
910 * output is attempted.
911 */
912 }
913
914 struct in6pcb *
915 in6_pcblookup_port(struct inpcbtable *table, struct in6_addr *laddr6,
916 u_int lport_arg, int lookup_wildcard, struct vestigial_inpcb *vp)
917 {
918 struct inpcbhead *head;
919 struct inpcb_hdr *inph;
920 struct in6pcb *in6p, *match = 0;
921 struct vestigial_hooks *vestige;
922 int matchwild = 3, wildcard;
923 u_int16_t lport = lport_arg;
924
925 if (vp)
926 vp->valid = 0;
927
928 head = IN6PCBHASH_PORT(table, lport);
929 LIST_FOREACH(inph, head, inph_lhash) {
930 in6p = (struct in6pcb *)inph;
931 if (in6p->in6p_af != AF_INET6)
932 continue;
933
934 if (in6p->in6p_lport != lport)
935 continue;
936 wildcard = 0;
937 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) {
938 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
939 continue;
940 }
941 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr))
942 wildcard++;
943 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) {
944 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
945 continue;
946 if (!IN6_IS_ADDR_V4MAPPED(laddr6))
947 continue;
948
949 /* duplicate of IPv4 logic */
950 wildcard = 0;
951 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) &&
952 in6p->in6p_faddr.s6_addr32[3])
953 wildcard++;
954 if (!in6p->in6p_laddr.s6_addr32[3]) {
955 if (laddr6->s6_addr32[3])
956 wildcard++;
957 } else {
958 if (!laddr6->s6_addr32[3])
959 wildcard++;
960 else {
961 if (in6p->in6p_laddr.s6_addr32[3] !=
962 laddr6->s6_addr32[3])
963 continue;
964 }
965 }
966 } else if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
967 if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
968 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
969 continue;
970 }
971 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6))
972 wildcard++;
973 } else {
974 if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
975 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
976 continue;
977 }
978 if (IN6_IS_ADDR_UNSPECIFIED(laddr6))
979 wildcard++;
980 else {
981 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
982 laddr6))
983 continue;
984 }
985 }
986 if (wildcard && !lookup_wildcard)
987 continue;
988 if (wildcard < matchwild) {
989 match = in6p;
990 matchwild = wildcard;
991 if (matchwild == 0)
992 break;
993 }
994 }
995 if (match && matchwild == 0)
996 return match;
997
998 if (vp && (vestige = table->inpt_vestige) != NULL &&
999 vestige->init_ports6 != NULL) {
1000 struct vestigial_inpcb better;
1001 void *state;
1002
1003 state = (*vestige->init_ports6)(laddr6, lport_arg,
1004 lookup_wildcard);
1005 while ((*vestige->next_port6)(state, vp)) {
1006
1007 if (vp->lport != lport)
1008 continue;
1009 wildcard = 0;
1010 if (!IN6_IS_ADDR_UNSPECIFIED(&vp->faddr.v6))
1011 wildcard++;
1012 if (IN6_IS_ADDR_UNSPECIFIED(&vp->laddr.v6)) {
1013 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6))
1014 wildcard++;
1015 } else {
1016 if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
1017 if (vp->v6only)
1018 continue;
1019 }
1020 if (IN6_IS_ADDR_UNSPECIFIED(laddr6))
1021 wildcard++;
1022 else {
1023 if (!IN6_ARE_ADDR_EQUAL(&vp->laddr.v6, laddr6))
1024 continue;
1025 }
1026 }
1027 if (wildcard && !lookup_wildcard)
1028 continue;
1029 if (wildcard < matchwild) {
1030 better = *vp;
1031 match = (void*)&better;
1032
1033 matchwild = wildcard;
1034 if (matchwild == 0)
1035 break;
1036 }
1037 }
1038
1039 if (match) {
1040 if (match != (void*)&better)
1041 return match;
1042 else {
1043 *vp = better;
1044 return 0;
1045 }
1046 }
1047 }
1048 return (match);
1049 }
1050
1051 /*
1052 * WARNING: return value (rtentry) could be IPv4 one if in6pcb is connected to
1053 * IPv4 mapped address.
1054 */
1055 struct rtentry *
1056 in6_pcbrtentry(struct in6pcb *in6p)
1057 {
1058 struct rtentry *rt;
1059 struct route *ro;
1060 union {
1061 const struct sockaddr *sa;
1062 const struct sockaddr_in6 *sa6;
1063 #ifdef INET
1064 const struct sockaddr_in *sa4;
1065 #endif
1066 } cdst;
1067
1068 ro = &in6p->in6p_route;
1069
1070 if (in6p->in6p_af != AF_INET6)
1071 return (NULL);
1072
1073 cdst.sa = rtcache_getdst(ro);
1074 if (cdst.sa == NULL)
1075 ;
1076 #ifdef INET
1077 else if (cdst.sa->sa_family == AF_INET) {
1078 KASSERT(IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr));
1079 if (cdst.sa4->sin_addr.s_addr != in6p->in6p_faddr.s6_addr32[3])
1080 rtcache_free(ro);
1081 }
1082 #endif
1083 else {
1084 if (!IN6_ARE_ADDR_EQUAL(&cdst.sa6->sin6_addr,
1085 &in6p->in6p_faddr))
1086 rtcache_free(ro);
1087 }
1088 if ((rt = rtcache_validate(ro)) == NULL)
1089 rt = rtcache_update(ro, 1);
1090 #ifdef INET
1091 if (rt == NULL && IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) {
1092 union {
1093 struct sockaddr dst;
1094 struct sockaddr_in dst4;
1095 } u;
1096 struct in_addr addr;
1097
1098 addr.s_addr = in6p->in6p_faddr.s6_addr32[3];
1099
1100 sockaddr_in_init(&u.dst4, &addr, 0);
1101 rtcache_setdst(ro, &u.dst);
1102
1103 rt = rtcache_init(ro);
1104 } else
1105 #endif
1106 if (rt == NULL && !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
1107 union {
1108 struct sockaddr dst;
1109 struct sockaddr_in6 dst6;
1110 } u;
1111
1112 sockaddr_in6_init(&u.dst6, &in6p->in6p_faddr, 0, 0, 0);
1113 rtcache_setdst(ro, &u.dst);
1114
1115 rt = rtcache_init(ro);
1116 }
1117 return rt;
1118 }
1119
1120 struct in6pcb *
1121 in6_pcblookup_connect(struct inpcbtable *table, const struct in6_addr *faddr6,
1122 u_int fport_arg, const struct in6_addr *laddr6, u_int lport_arg,
1123 int faith,
1124 struct vestigial_inpcb *vp)
1125 {
1126 struct inpcbhead *head;
1127 struct inpcb_hdr *inph;
1128 struct in6pcb *in6p;
1129 struct vestigial_hooks *vestige;
1130 u_int16_t fport = fport_arg, lport = lport_arg;
1131
1132 if (vp)
1133 vp->valid = 0;
1134
1135 head = IN6PCBHASH_CONNECT(table, faddr6, fport, laddr6, lport);
1136 LIST_FOREACH(inph, head, inph_hash) {
1137 in6p = (struct in6pcb *)inph;
1138 if (in6p->in6p_af != AF_INET6)
1139 continue;
1140
1141 /* find exact match on both source and dest */
1142 if (in6p->in6p_fport != fport)
1143 continue;
1144 if (in6p->in6p_lport != lport)
1145 continue;
1146 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr))
1147 continue;
1148 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6))
1149 continue;
1150 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
1151 continue;
1152 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6))
1153 continue;
1154 if ((IN6_IS_ADDR_V4MAPPED(laddr6) ||
1155 IN6_IS_ADDR_V4MAPPED(faddr6)) &&
1156 (in6p->in6p_flags & IN6P_IPV6_V6ONLY))
1157 continue;
1158 return in6p;
1159 }
1160 if (vp && (vestige = table->inpt_vestige) != NULL) {
1161 if ((*vestige->lookup6)(faddr6, fport_arg, laddr6, lport_arg, vp))
1162 return 0;
1163 }
1164
1165 return NULL;
1166 }
1167
1168 struct in6pcb *
1169 in6_pcblookup_bind(struct inpcbtable *table, const struct in6_addr *laddr6,
1170 u_int lport_arg, int faith)
1171 {
1172 struct inpcbhead *head;
1173 struct inpcb_hdr *inph;
1174 struct in6pcb *in6p;
1175 u_int16_t lport = lport_arg;
1176 #ifdef INET
1177 struct in6_addr zero_mapped;
1178 #endif
1179
1180 head = IN6PCBHASH_BIND(table, laddr6, lport);
1181 LIST_FOREACH(inph, head, inph_hash) {
1182 in6p = (struct in6pcb *)inph;
1183 if (in6p->in6p_af != AF_INET6)
1184 continue;
1185
1186 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
1187 continue;
1188 if (in6p->in6p_fport != 0)
1189 continue;
1190 if (in6p->in6p_lport != lport)
1191 continue;
1192 if (IN6_IS_ADDR_V4MAPPED(laddr6) &&
1193 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
1194 continue;
1195 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6))
1196 goto out;
1197 }
1198 #ifdef INET
1199 if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
1200 memset(&zero_mapped, 0, sizeof(zero_mapped));
1201 zero_mapped.s6_addr16[5] = 0xffff;
1202 head = IN6PCBHASH_BIND(table, &zero_mapped, lport);
1203 LIST_FOREACH(inph, head, inph_hash) {
1204 in6p = (struct in6pcb *)inph;
1205 if (in6p->in6p_af != AF_INET6)
1206 continue;
1207
1208 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
1209 continue;
1210 if (in6p->in6p_fport != 0)
1211 continue;
1212 if (in6p->in6p_lport != lport)
1213 continue;
1214 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
1215 continue;
1216 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zero_mapped))
1217 goto out;
1218 }
1219 }
1220 #endif
1221 head = IN6PCBHASH_BIND(table, &zeroin6_addr, lport);
1222 LIST_FOREACH(inph, head, inph_hash) {
1223 in6p = (struct in6pcb *)inph;
1224 if (in6p->in6p_af != AF_INET6)
1225 continue;
1226
1227 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
1228 continue;
1229 if (in6p->in6p_fport != 0)
1230 continue;
1231 if (in6p->in6p_lport != lport)
1232 continue;
1233 if (IN6_IS_ADDR_V4MAPPED(laddr6) &&
1234 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
1235 continue;
1236 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zeroin6_addr))
1237 goto out;
1238 }
1239 return (NULL);
1240
1241 out:
1242 inph = &in6p->in6p_head;
1243 if (inph != LIST_FIRST(head)) {
1244 LIST_REMOVE(inph, inph_hash);
1245 LIST_INSERT_HEAD(head, inph, inph_hash);
1246 }
1247 return in6p;
1248 }
1249
1250 void
1251 in6_pcbstate(struct in6pcb *in6p, int state)
1252 {
1253
1254 if (in6p->in6p_af != AF_INET6)
1255 return;
1256
1257 if (in6p->in6p_state > IN6P_ATTACHED)
1258 LIST_REMOVE(&in6p->in6p_head, inph_hash);
1259
1260 switch (state) {
1261 case IN6P_BOUND:
1262 LIST_INSERT_HEAD(IN6PCBHASH_BIND(in6p->in6p_table,
1263 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head,
1264 inph_hash);
1265 break;
1266 case IN6P_CONNECTED:
1267 LIST_INSERT_HEAD(IN6PCBHASH_CONNECT(in6p->in6p_table,
1268 &in6p->in6p_faddr, in6p->in6p_fport,
1269 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head,
1270 inph_hash);
1271 break;
1272 }
1273
1274 in6p->in6p_state = state;
1275 }
1276