1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * Copyright (c) 2010-2011 Juniper Networks, Inc.
6 * All rights reserved.
7 *
8 * Portions of this software were developed by Robert N. M. Watson under
9 * contract to Juniper Networks, Inc.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the project nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $
36 */
37
38 /*-
39 * Copyright (c) 1982, 1986, 1991, 1993
40 * The Regents of the University of California. All rights reserved.
41 *
42 * Redistribution and use in source and binary forms, with or without
43 * modification, are permitted provided that the following conditions
44 * are met:
45 * 1. Redistributions of source code must retain the above copyright
46 * notice, this list of conditions and the following disclaimer.
47 * 2. Redistributions in binary form must reproduce the above copyright
48 * notice, this list of conditions and the following disclaimer in the
49 * documentation and/or other materials provided with the distribution.
50 * 3. Neither the name of the University nor the names of its contributors
51 * may be used to endorse or promote products derived from this software
52 * without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 * SUCH DAMAGE.
65 *
66 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94
67 */
68
69 #include <sys/cdefs.h>
70 __FBSDID("$FreeBSD$");
71
72 #include "opt_inet.h"
73 #include "opt_inet6.h"
74 #include "opt_ipsec.h"
75 #include "opt_pcbgroup.h"
76 #include "opt_route.h"
77 #include "opt_rss.h"
78
79 #include <sys/param.h>
80 #include <sys/systm.h>
81 #include <sys/malloc.h>
82 #include <sys/mbuf.h>
83 #include <sys/domain.h>
84 #include <sys/protosw.h>
85 #include <sys/socket.h>
86 #include <sys/socketvar.h>
87 #include <sys/sockio.h>
88 #include <sys/errno.h>
89 #include <sys/time.h>
90 #include <sys/priv.h>
91 #include <sys/proc.h>
92 #include <sys/jail.h>
93
94 #include <vm/uma.h>
95
96 #include <net/if.h>
97 #include <net/if_var.h>
98 #include <net/if_llatbl.h>
99 #include <net/if_types.h>
100 #include <net/route.h>
101 #include <net/route/nhop.h>
102
103 #include <netinet/in.h>
104 #include <netinet/in_var.h>
105 #include <netinet/in_systm.h>
106 #include <netinet/tcp_var.h>
107 #include <netinet/ip6.h>
108 #include <netinet/ip_var.h>
109
110 #include <netinet6/ip6_var.h>
111 #include <netinet6/nd6.h>
112 #include <netinet/in_pcb.h>
113 #include <netinet6/in6_pcb.h>
114 #include <netinet6/in6_fib.h>
115 #include <netinet6/scope6_var.h>
116
117 int
118 in6_pcbbind(struct inpcb *inp, struct sockaddr *nam,
119 struct ucred *cred)
120 {
121 struct socket *so = inp->inp_socket;
122 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
123 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
124 u_short lport = 0;
125 int error, lookupflags = 0;
126 int reuseport = (so->so_options & SO_REUSEPORT);
127
128 /*
129 * XXX: Maybe we could let SO_REUSEPORT_LB set SO_REUSEPORT bit here
130 * so that we don't have to add to the (already messy) code below.
131 */
132 int reuseport_lb = (so->so_options & SO_REUSEPORT_LB);
133
134 INP_WLOCK_ASSERT(inp);
135 INP_HASH_WLOCK_ASSERT(pcbinfo);
136
137 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
138 return (EINVAL);
139 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT|SO_REUSEPORT_LB)) == 0)
140 lookupflags = INPLOOKUP_WILDCARD;
141 if (nam == NULL) {
142 if ((error = prison_local_ip6(cred, &inp->in6p_laddr,
143 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
144 return (error);
145 } else {
146 sin6 = (struct sockaddr_in6 *)nam;
147 KASSERT(sin6->sin6_family == AF_INET6,
148 ("%s: invalid address family for %p", __func__, sin6));
149 KASSERT(sin6->sin6_len == sizeof(*sin6),
150 ("%s: invalid address length for %p", __func__, sin6));
151
152 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
153 return(error);
154
155 if ((error = prison_local_ip6(cred, &sin6->sin6_addr,
156 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
157 return (error);
158
159 lport = sin6->sin6_port;
160 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
161 /*
162 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
163 * allow compepte duplication of binding if
164 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
165 * and a multicast address is bound on both
166 * new and duplicated sockets.
167 */
168 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) != 0)
169 reuseport = SO_REUSEADDR|SO_REUSEPORT;
170 /*
171 * XXX: How to deal with SO_REUSEPORT_LB here?
172 * Treat same as SO_REUSEPORT for now.
173 */
174 if ((so->so_options &
175 (SO_REUSEADDR|SO_REUSEPORT_LB)) != 0)
176 reuseport_lb = SO_REUSEADDR|SO_REUSEPORT_LB;
177 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
178 struct epoch_tracker et;
179 struct ifaddr *ifa;
180
181 sin6->sin6_port = 0; /* yech... */
182 NET_EPOCH_ENTER(et);
183 if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) ==
184 NULL &&
185 (inp->inp_flags & INP_BINDANY) == 0) {
186 NET_EPOCH_EXIT(et);
187 return (EADDRNOTAVAIL);
188 }
189
190 /*
191 * XXX: bind to an anycast address might accidentally
192 * cause sending a packet with anycast source address.
193 * We should allow to bind to a deprecated address, since
194 * the application dares to use it.
195 */
196 if (ifa != NULL &&
197 ((struct in6_ifaddr *)ifa)->ia6_flags &
198 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
199 NET_EPOCH_EXIT(et);
200 return (EADDRNOTAVAIL);
201 }
202 NET_EPOCH_EXIT(et);
203 }
204 if (lport) {
205 struct inpcb *t;
206 struct tcptw *tw;
207
208 /* GROSS */
209 if (ntohs(lport) <= V_ipport_reservedhigh &&
210 ntohs(lport) >= V_ipport_reservedlow &&
211 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT))
212 return (EACCES);
213 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
214 priv_check_cred(inp->inp_cred, PRIV_NETINET_REUSEPORT) != 0) {
215 t = in6_pcblookup_local(pcbinfo,
216 &sin6->sin6_addr, lport,
217 INPLOOKUP_WILDCARD, cred);
218 if (t &&
219 ((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
220 ((t->inp_flags & INP_TIMEWAIT) == 0) &&
221 (so->so_type != SOCK_STREAM ||
222 IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) &&
223 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
224 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
225 (t->inp_flags2 & INP_REUSEPORT) ||
226 (t->inp_flags2 & INP_REUSEPORT_LB) == 0) &&
227 (inp->inp_cred->cr_uid !=
228 t->inp_cred->cr_uid))
229 return (EADDRINUSE);
230
231 /*
232 * If the socket is a BINDMULTI socket, then
233 * the credentials need to match and the
234 * original socket also has to have been bound
235 * with BINDMULTI.
236 */
237 if (t && (! in_pcbbind_check_bindmulti(inp, t)))
238 return (EADDRINUSE);
239
240 #ifdef INET
241 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
242 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
243 struct sockaddr_in sin;
244
245 in6_sin6_2_sin(&sin, sin6);
246 t = in_pcblookup_local(pcbinfo,
247 sin.sin_addr, lport,
248 INPLOOKUP_WILDCARD, cred);
249 if (t &&
250 ((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
251 ((t->inp_flags &
252 INP_TIMEWAIT) == 0) &&
253 (so->so_type != SOCK_STREAM ||
254 ntohl(t->inp_faddr.s_addr) ==
255 INADDR_ANY) &&
256 (inp->inp_cred->cr_uid !=
257 t->inp_cred->cr_uid))
258 return (EADDRINUSE);
259
260 if (t && (! in_pcbbind_check_bindmulti(inp, t)))
261 return (EADDRINUSE);
262 }
263 #endif
264 }
265 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
266 lport, lookupflags, cred);
267 if (t && (t->inp_flags & INP_TIMEWAIT)) {
268 /*
269 * XXXRW: If an incpb has had its timewait
270 * state recycled, we treat the address as
271 * being in use (for now). This is better
272 * than a panic, but not desirable.
273 */
274 tw = intotw(t);
275 if (tw == NULL ||
276 ((reuseport & tw->tw_so_options) == 0 &&
277 (reuseport_lb & tw->tw_so_options) == 0))
278 return (EADDRINUSE);
279 } else if (t && (reuseport & inp_so_options(t)) == 0 &&
280 (reuseport_lb & inp_so_options(t)) == 0) {
281 return (EADDRINUSE);
282 }
283 #ifdef INET
284 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
285 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
286 struct sockaddr_in sin;
287
288 in6_sin6_2_sin(&sin, sin6);
289 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
290 lport, lookupflags, cred);
291 if (t && t->inp_flags & INP_TIMEWAIT) {
292 tw = intotw(t);
293 if (tw == NULL)
294 return (EADDRINUSE);
295 if ((reuseport & tw->tw_so_options) == 0
296 && (reuseport_lb & tw->tw_so_options) == 0
297 && (ntohl(t->inp_laddr.s_addr) !=
298 INADDR_ANY || ((inp->inp_vflag &
299 INP_IPV6PROTO) ==
300 (t->inp_vflag & INP_IPV6PROTO))))
301 return (EADDRINUSE);
302 } else if (t &&
303 (reuseport & inp_so_options(t)) == 0 &&
304 (reuseport_lb & inp_so_options(t)) == 0 &&
305 (ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
306 (t->inp_vflag & INP_IPV6PROTO) != 0)) {
307 return (EADDRINUSE);
308 }
309 }
310 #endif
311 }
312 inp->in6p_laddr = sin6->sin6_addr;
313 }
314 if (lport == 0) {
315 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) {
316 /* Undo an address bind that may have occurred. */
317 inp->in6p_laddr = in6addr_any;
318 return (error);
319 }
320 } else {
321 inp->inp_lport = lport;
322 if (in_pcbinshash(inp) != 0) {
323 inp->in6p_laddr = in6addr_any;
324 inp->inp_lport = 0;
325 return (EAGAIN);
326 }
327 }
328 return (0);
329 }
330
331 /*
332 * Transform old in6_pcbconnect() into an inner subroutine for new
333 * in6_pcbconnect(): Do some validity-checking on the remote
334 * address (in mbuf 'nam') and then determine local host address
335 * (i.e., which interface) to use to access that remote host.
336 *
337 * This preserves definition of in6_pcbconnect(), while supporting a
338 * slightly different version for T/TCP. (This is more than
339 * a bit of a kludge, but cleaning up the internal interfaces would
340 * have forced minor changes in every protocol).
341 */
342 static int
343 in6_pcbladdr(struct inpcb *inp, struct sockaddr_in6 *sin6,
344 struct in6_addr *plocal_addr6)
345 {
346 int error = 0;
347 int scope_ambiguous = 0;
348 struct in6_addr in6a;
349 struct epoch_tracker et;
350
351 INP_WLOCK_ASSERT(inp);
352 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); /* XXXRW: why? */
353
354 if (sin6->sin6_port == 0)
355 return (EADDRNOTAVAIL);
356
357 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
358 scope_ambiguous = 1;
359 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
360 return(error);
361
362 if (!CK_STAILQ_EMPTY(&V_in6_ifaddrhead)) {
363 /*
364 * If the destination address is UNSPECIFIED addr,
365 * use the loopback addr, e.g ::1.
366 */
367 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
368 sin6->sin6_addr = in6addr_loopback;
369 }
370 if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0)
371 return (error);
372
373 NET_EPOCH_ENTER(et);
374 error = in6_selectsrc_socket(sin6, inp->in6p_outputopts,
375 inp, inp->inp_cred, scope_ambiguous, &in6a, NULL);
376 NET_EPOCH_EXIT(et);
377 if (error)
378 return (error);
379
380 /*
381 * Do not update this earlier, in case we return with an error.
382 *
383 * XXX: this in6_selectsrc_socket result might replace the bound local
384 * address with the address specified by setsockopt(IPV6_PKTINFO).
385 * Is it the intended behavior?
386 */
387 *plocal_addr6 = in6a;
388
389 /*
390 * Don't do pcblookup call here; return interface in
391 * plocal_addr6
392 * and exit to caller, that will do the lookup.
393 */
394
395 return (0);
396 }
397
398 /*
399 * Outer subroutine:
400 * Connect from a socket to a specified address.
401 * Both address and port must be specified in argument sin.
402 * If don't have a local address for this socket yet,
403 * then pick one.
404 */
405 int
406 in6_pcbconnect_mbuf(struct inpcb *inp, struct sockaddr *nam,
407 struct ucred *cred, struct mbuf *m, bool rehash)
408 {
409 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
410 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
411 struct sockaddr_in6 laddr6;
412 int error;
413
414 KASSERT(sin6->sin6_family == AF_INET6,
415 ("%s: invalid address family for %p", __func__, sin6));
416 KASSERT(sin6->sin6_len == sizeof(*sin6),
417 ("%s: invalid address length for %p", __func__, sin6));
418
419 bzero(&laddr6, sizeof(laddr6));
420 laddr6.sin6_family = AF_INET6;
421
422 INP_WLOCK_ASSERT(inp);
423 INP_HASH_WLOCK_ASSERT(pcbinfo);
424
425 #ifdef ROUTE_MPATH
426 if (CALC_FLOWID_OUTBOUND) {
427 uint32_t hash_type, hash_val;
428
429 hash_val = fib6_calc_software_hash(&inp->in6p_laddr,
430 &sin6->sin6_addr, 0, sin6->sin6_port,
431 inp->inp_socket->so_proto->pr_protocol, &hash_type);
432 inp->inp_flowid = hash_val;
433 inp->inp_flowtype = hash_type;
434 }
435 #endif
436 /*
437 * Call inner routine, to assign local interface address.
438 * in6_pcbladdr() may automatically fill in sin6_scope_id.
439 */
440 if ((error = in6_pcbladdr(inp, sin6, &laddr6.sin6_addr)) != 0)
441 return (error);
442
443 if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr,
444 sin6->sin6_port,
445 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
446 ? &laddr6.sin6_addr : &inp->in6p_laddr,
447 inp->inp_lport, 0, NULL, M_NODOM) != NULL) {
448 return (EADDRINUSE);
449 }
450 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
451 if (inp->inp_lport == 0) {
452 /*
453 * rehash was required to be true in the past for
454 * this case; retain that convention. However,
455 * we now call in_pcb_lport_dest rather than
456 * in6_pcbbind; the former does not insert into
457 * the hash table, the latter does. Change rehash
458 * to false to do the in_pcbinshash below.
459 */
460 KASSERT(rehash == true,
461 ("Rehashing required for unbound inps"));
462 rehash = false;
463 error = in_pcb_lport_dest(inp,
464 (struct sockaddr *) &laddr6, &inp->inp_lport,
465 (struct sockaddr *) sin6, sin6->sin6_port, cred,
466 INPLOOKUP_WILDCARD);
467 if (error)
468 return (error);
469 }
470 inp->in6p_laddr = laddr6.sin6_addr;
471 }
472 inp->in6p_faddr = sin6->sin6_addr;
473 inp->inp_fport = sin6->sin6_port;
474 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
475 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
476 if (inp->inp_flags & IN6P_AUTOFLOWLABEL)
477 inp->inp_flow |=
478 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
479
480 if (rehash) {
481 in_pcbrehash_mbuf(inp, m);
482 } else {
483 in_pcbinshash_mbuf(inp, m);
484 }
485
486 return (0);
487 }
488
489 int
490 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
491 {
492
493 return (in6_pcbconnect_mbuf(inp, nam, cred, NULL, true));
494 }
495
496 void
497 in6_pcbdisconnect(struct inpcb *inp)
498 {
499
500 INP_WLOCK_ASSERT(inp);
501 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
502
503 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
504 inp->inp_fport = 0;
505 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
506 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
507 in_pcbrehash(inp);
508 }
509
510 struct sockaddr *
511 in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
512 {
513 struct sockaddr_in6 *sin6;
514
515 sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK);
516 bzero(sin6, sizeof *sin6);
517 sin6->sin6_family = AF_INET6;
518 sin6->sin6_len = sizeof(*sin6);
519 sin6->sin6_port = port;
520 sin6->sin6_addr = *addr_p;
521 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
522
523 return (struct sockaddr *)sin6;
524 }
525
526 struct sockaddr *
527 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p)
528 {
529 struct sockaddr_in sin;
530 struct sockaddr_in6 *sin6_p;
531
532 bzero(&sin, sizeof sin);
533 sin.sin_family = AF_INET;
534 sin.sin_len = sizeof(sin);
535 sin.sin_port = port;
536 sin.sin_addr = *addr_p;
537
538 sin6_p = malloc(sizeof *sin6_p, M_SONAME,
539 M_WAITOK);
540 in6_sin_2_v4mapsin6(&sin, sin6_p);
541
542 return (struct sockaddr *)sin6_p;
543 }
544
545 int
546 in6_getsockaddr(struct socket *so, struct sockaddr **nam)
547 {
548 struct inpcb *inp;
549 struct in6_addr addr;
550 in_port_t port;
551
552 inp = sotoinpcb(so);
553 KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL"));
554
555 INP_RLOCK(inp);
556 port = inp->inp_lport;
557 addr = inp->in6p_laddr;
558 INP_RUNLOCK(inp);
559
560 *nam = in6_sockaddr(port, &addr);
561 return 0;
562 }
563
564 int
565 in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
566 {
567 struct inpcb *inp;
568 struct in6_addr addr;
569 in_port_t port;
570
571 inp = sotoinpcb(so);
572 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL"));
573
574 INP_RLOCK(inp);
575 port = inp->inp_fport;
576 addr = inp->in6p_faddr;
577 INP_RUNLOCK(inp);
578
579 *nam = in6_sockaddr(port, &addr);
580 return 0;
581 }
582
583 int
584 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
585 {
586 struct inpcb *inp;
587 int error;
588
589 inp = sotoinpcb(so);
590 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL"));
591
592 #ifdef INET
593 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
594 error = in_getsockaddr(so, nam);
595 if (error == 0)
596 in6_sin_2_v4mapsin6_in_sock(nam);
597 } else
598 #endif
599 {
600 /* scope issues will be handled in in6_getsockaddr(). */
601 error = in6_getsockaddr(so, nam);
602 }
603
604 return error;
605 }
606
607 int
608 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
609 {
610 struct inpcb *inp;
611 int error;
612
613 inp = sotoinpcb(so);
614 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL"));
615
616 #ifdef INET
617 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
618 error = in_getpeeraddr(so, nam);
619 if (error == 0)
620 in6_sin_2_v4mapsin6_in_sock(nam);
621 } else
622 #endif
623 /* scope issues will be handled in in6_getpeeraddr(). */
624 error = in6_getpeeraddr(so, nam);
625
626 return error;
627 }
628
629 /*
630 * Pass some notification to all connections of a protocol
631 * associated with address dst. The local address and/or port numbers
632 * may be specified to limit the search. The "usual action" will be
633 * taken, depending on the ctlinput cmd. The caller must filter any
634 * cmds that are uninteresting (e.g., no error in the map).
635 * Call the protocol specific routine (if any) to report
636 * any errors for each matching socket.
637 */
638 void
639 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst,
640 u_int fport_arg, const struct sockaddr *src, u_int lport_arg,
641 int cmd, void *cmdarg,
642 struct inpcb *(*notify)(struct inpcb *, int))
643 {
644 struct inpcb *inp, *inp_temp;
645 struct sockaddr_in6 sa6_src, *sa6_dst;
646 u_short fport = fport_arg, lport = lport_arg;
647 u_int32_t flowinfo;
648 int errno;
649
650 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
651 return;
652
653 sa6_dst = (struct sockaddr_in6 *)dst;
654 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
655 return;
656
657 /*
658 * note that src can be NULL when we get notify by local fragmentation.
659 */
660 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
661 flowinfo = sa6_src.sin6_flowinfo;
662
663 /*
664 * Redirects go to all references to the destination,
665 * and use in6_rtchange to invalidate the route cache.
666 * Dead host indications: also use in6_rtchange to invalidate
667 * the cache, and deliver the error to all the sockets.
668 * Otherwise, if we have knowledge of the local port and address,
669 * deliver only to that socket.
670 */
671 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
672 fport = 0;
673 lport = 0;
674 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
675
676 if (cmd != PRC_HOSTDEAD)
677 notify = in6_rtchange;
678 }
679 errno = inet6ctlerrmap[cmd];
680 INP_INFO_WLOCK(pcbinfo);
681 CK_LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
682 INP_WLOCK(inp);
683 if ((inp->inp_vflag & INP_IPV6) == 0) {
684 INP_WUNLOCK(inp);
685 continue;
686 }
687
688 /*
689 * If the error designates a new path MTU for a destination
690 * and the application (associated with this socket) wanted to
691 * know the value, notify.
692 * XXX: should we avoid to notify the value to TCP sockets?
693 */
694 if (cmd == PRC_MSGSIZE && cmdarg != NULL)
695 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst,
696 *(u_int32_t *)cmdarg);
697
698 /*
699 * Detect if we should notify the error. If no source and
700 * destination ports are specifed, but non-zero flowinfo and
701 * local address match, notify the error. This is the case
702 * when the error is delivered with an encrypted buffer
703 * by ESP. Otherwise, just compare addresses and ports
704 * as usual.
705 */
706 if (lport == 0 && fport == 0 && flowinfo &&
707 inp->inp_socket != NULL &&
708 flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) &&
709 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
710 goto do_notify;
711 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
712 &sa6_dst->sin6_addr) ||
713 inp->inp_socket == 0 ||
714 (lport && inp->inp_lport != lport) ||
715 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
716 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
717 &sa6_src.sin6_addr)) ||
718 (fport && inp->inp_fport != fport)) {
719 INP_WUNLOCK(inp);
720 continue;
721 }
722
723 do_notify:
724 if (notify) {
725 if ((*notify)(inp, errno))
726 INP_WUNLOCK(inp);
727 } else
728 INP_WUNLOCK(inp);
729 }
730 INP_INFO_WUNLOCK(pcbinfo);
731 }
732
733 /*
734 * Lookup a PCB based on the local address and port. Caller must hold the
735 * hash lock. No inpcb locks or references are acquired.
736 */
737 struct inpcb *
738 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
739 u_short lport, int lookupflags, struct ucred *cred)
740 {
741 struct inpcb *inp;
742 int matchwild = 3, wildcard;
743
744 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
745 ("%s: invalid lookup flags %d", __func__, lookupflags));
746
747 INP_HASH_LOCK_ASSERT(pcbinfo);
748
749 if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
750 struct inpcbhead *head;
751 /*
752 * Look for an unconnected (wildcard foreign addr) PCB that
753 * matches the local address and port we're looking for.
754 */
755 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(
756 INP6_PCBHASHKEY(&in6addr_any), lport, 0,
757 pcbinfo->ipi_hashmask)];
758 CK_LIST_FOREACH(inp, head, inp_hash) {
759 /* XXX inp locking */
760 if ((inp->inp_vflag & INP_IPV6) == 0)
761 continue;
762 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
763 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
764 inp->inp_lport == lport) {
765 /* Found. */
766 if (cred == NULL ||
767 prison_equal_ip6(cred->cr_prison,
768 inp->inp_cred->cr_prison))
769 return (inp);
770 }
771 }
772 /*
773 * Not found.
774 */
775 return (NULL);
776 } else {
777 struct inpcbporthead *porthash;
778 struct inpcbport *phd;
779 struct inpcb *match = NULL;
780 /*
781 * Best fit PCB lookup.
782 *
783 * First see if this local port is in use by looking on the
784 * port hash list.
785 */
786 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
787 pcbinfo->ipi_porthashmask)];
788 CK_LIST_FOREACH(phd, porthash, phd_hash) {
789 if (phd->phd_port == lport)
790 break;
791 }
792 if (phd != NULL) {
793 /*
794 * Port is in use by one or more PCBs. Look for best
795 * fit.
796 */
797 CK_LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
798 wildcard = 0;
799 if (cred != NULL &&
800 !prison_equal_ip6(cred->cr_prison,
801 inp->inp_cred->cr_prison))
802 continue;
803 /* XXX inp locking */
804 if ((inp->inp_vflag & INP_IPV6) == 0)
805 continue;
806 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
807 wildcard++;
808 if (!IN6_IS_ADDR_UNSPECIFIED(
809 &inp->in6p_laddr)) {
810 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
811 wildcard++;
812 else if (!IN6_ARE_ADDR_EQUAL(
813 &inp->in6p_laddr, laddr))
814 continue;
815 } else {
816 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
817 wildcard++;
818 }
819 if (wildcard < matchwild) {
820 match = inp;
821 matchwild = wildcard;
822 if (matchwild == 0)
823 break;
824 }
825 }
826 }
827 return (match);
828 }
829 }
830
831 void
832 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
833 {
834 struct inpcb *inp;
835 struct in6_multi *inm;
836 struct in6_mfilter *imf;
837 struct ip6_moptions *im6o;
838
839 INP_INFO_WLOCK(pcbinfo);
840 CK_LIST_FOREACH(inp, pcbinfo->ipi_listhead, inp_list) {
841 INP_WLOCK(inp);
842 if (__predict_false(inp->inp_flags2 & INP_FREED)) {
843 INP_WUNLOCK(inp);
844 continue;
845 }
846 im6o = inp->in6p_moptions;
847 if ((inp->inp_vflag & INP_IPV6) && im6o != NULL) {
848 /*
849 * Unselect the outgoing ifp for multicast if it
850 * is being detached.
851 */
852 if (im6o->im6o_multicast_ifp == ifp)
853 im6o->im6o_multicast_ifp = NULL;
854 /*
855 * Drop multicast group membership if we joined
856 * through the interface being detached.
857 */
858 restart:
859 IP6_MFILTER_FOREACH(imf, &im6o->im6o_head) {
860 if ((inm = imf->im6f_in6m) == NULL)
861 continue;
862 if (inm->in6m_ifp != ifp)
863 continue;
864 ip6_mfilter_remove(&im6o->im6o_head, imf);
865 IN6_MULTI_LOCK_ASSERT();
866 in6_leavegroup_locked(inm, NULL);
867 ip6_mfilter_free(imf);
868 goto restart;
869 }
870 }
871 INP_WUNLOCK(inp);
872 }
873 INP_INFO_WUNLOCK(pcbinfo);
874 }
875
876 /*
877 * Check for alternatives when higher level complains
878 * about service problems. For now, invalidate cached
879 * routing information. If the route was created dynamically
880 * (by a redirect), time to try a default gateway again.
881 */
882 void
883 in6_losing(struct inpcb *inp)
884 {
885
886 RO_INVALIDATE_CACHE(&inp->inp_route6);
887 }
888
889 /*
890 * After a routing change, flush old routing
891 * and allocate a (hopefully) better one.
892 */
893 struct inpcb *
894 in6_rtchange(struct inpcb *inp, int errno __unused)
895 {
896
897 RO_INVALIDATE_CACHE(&inp->inp_route6);
898 return inp;
899 }
900
901 static struct inpcb *
902 in6_pcblookup_lbgroup(const struct inpcbinfo *pcbinfo,
903 const struct in6_addr *laddr, uint16_t lport, const struct in6_addr *faddr,
904 uint16_t fport, int lookupflags, uint8_t numa_domain)
905 {
906 struct inpcb *local_wild, *numa_wild;
907 const struct inpcblbgrouphead *hdr;
908 struct inpcblbgroup *grp;
909 uint32_t idx;
910
911 INP_HASH_LOCK_ASSERT(pcbinfo);
912
913 hdr = &pcbinfo->ipi_lbgrouphashbase[
914 INP_PCBPORTHASH(lport, pcbinfo->ipi_lbgrouphashmask)];
915
916 /*
917 * Order of socket selection:
918 * 1. non-wild.
919 * 2. wild (if lookupflags contains INPLOOKUP_WILDCARD).
920 *
921 * NOTE:
922 * - Load balanced group does not contain jailed sockets.
923 * - Load balanced does not contain IPv4 mapped INET6 wild sockets.
924 */
925 local_wild = NULL;
926 numa_wild = NULL;
927 CK_LIST_FOREACH(grp, hdr, il_list) {
928 #ifdef INET
929 if (!(grp->il_vflag & INP_IPV6))
930 continue;
931 #endif
932 if (grp->il_lport != lport)
933 continue;
934
935 idx = INP_PCBLBGROUP_PKTHASH(INP6_PCBHASHKEY(faddr), lport,
936 fport) % grp->il_inpcnt;
937 if (IN6_ARE_ADDR_EQUAL(&grp->il6_laddr, laddr)) {
938 if (numa_domain == M_NODOM ||
939 grp->il_numa_domain == numa_domain) {
940 return (grp->il_inp[idx]);
941 }
942 else
943 numa_wild = grp->il_inp[idx];
944 }
945 if (IN6_IS_ADDR_UNSPECIFIED(&grp->il6_laddr) &&
946 (lookupflags & INPLOOKUP_WILDCARD) != 0 &&
947 (local_wild == NULL || numa_domain == M_NODOM ||
948 grp->il_numa_domain == numa_domain)) {
949 local_wild = grp->il_inp[idx];
950 }
951 }
952 if (numa_wild != NULL)
953 return (numa_wild);
954 return (local_wild);
955 }
956
957 #ifdef PCBGROUP
958 /*
959 * Lookup PCB in hash list, using pcbgroup tables.
960 */
961 static struct inpcb *
962 in6_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup,
963 struct in6_addr *faddr, u_int fport_arg, struct in6_addr *laddr,
964 u_int lport_arg, int lookupflags, struct ifnet *ifp)
965 {
966 struct inpcbhead *head;
967 struct inpcb *inp, *tmpinp;
968 u_short fport = fport_arg, lport = lport_arg;
969 bool locked;
970
971 /*
972 * First look for an exact match.
973 */
974 tmpinp = NULL;
975 INP_GROUP_LOCK(pcbgroup);
976 head = &pcbgroup->ipg_hashbase[INP_PCBHASH(
977 INP6_PCBHASHKEY(faddr), lport, fport, pcbgroup->ipg_hashmask)];
978 CK_LIST_FOREACH(inp, head, inp_pcbgrouphash) {
979 /* XXX inp locking */
980 if ((inp->inp_vflag & INP_IPV6) == 0)
981 continue;
982 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
983 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
984 inp->inp_fport == fport &&
985 inp->inp_lport == lport) {
986 /*
987 * XXX We should be able to directly return
988 * the inp here, without any checks.
989 * Well unless both bound with SO_REUSEPORT?
990 */
991 if (prison_flag(inp->inp_cred, PR_IP6))
992 goto found;
993 if (tmpinp == NULL)
994 tmpinp = inp;
995 }
996 }
997 if (tmpinp != NULL) {
998 inp = tmpinp;
999 goto found;
1000 }
1001
1002 /*
1003 * Then look for a wildcard match in the pcbgroup.
1004 */
1005 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1006 struct inpcb *local_wild = NULL, *local_exact = NULL;
1007 struct inpcb *jail_wild = NULL;
1008 int injail;
1009
1010 /*
1011 * Order of socket selection - we always prefer jails.
1012 * 1. jailed, non-wild.
1013 * 2. jailed, wild.
1014 * 3. non-jailed, non-wild.
1015 * 4. non-jailed, wild.
1016 */
1017 head = &pcbgroup->ipg_hashbase[
1018 INP_PCBHASH(INADDR_ANY, lport, 0, pcbgroup->ipg_hashmask)];
1019 CK_LIST_FOREACH(inp, head, inp_pcbgrouphash) {
1020 /* XXX inp locking */
1021 if ((inp->inp_vflag & INP_IPV6) == 0)
1022 continue;
1023
1024 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
1025 inp->inp_lport != lport) {
1026 continue;
1027 }
1028
1029 injail = prison_flag(inp->inp_cred, PR_IP6);
1030 if (injail) {
1031 if (prison_check_ip6(inp->inp_cred,
1032 laddr) != 0)
1033 continue;
1034 } else {
1035 if (local_exact != NULL)
1036 continue;
1037 }
1038
1039 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
1040 if (injail)
1041 goto found;
1042 else
1043 local_exact = inp;
1044 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1045 if (injail)
1046 jail_wild = inp;
1047 else
1048 local_wild = inp;
1049 }
1050 } /* LIST_FOREACH */
1051
1052 inp = jail_wild;
1053 if (inp == NULL)
1054 inp = jail_wild;
1055 if (inp == NULL)
1056 inp = local_exact;
1057 if (inp == NULL)
1058 inp = local_wild;
1059 if (inp != NULL)
1060 goto found;
1061 }
1062
1063 /*
1064 * Then look for a wildcard match, if requested.
1065 */
1066 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1067 struct inpcb *local_wild = NULL, *local_exact = NULL;
1068 struct inpcb *jail_wild = NULL;
1069 int injail;
1070
1071 /*
1072 * Order of socket selection - we always prefer jails.
1073 * 1. jailed, non-wild.
1074 * 2. jailed, wild.
1075 * 3. non-jailed, non-wild.
1076 * 4. non-jailed, wild.
1077 */
1078 head = &pcbinfo->ipi_wildbase[INP_PCBHASH(
1079 INP6_PCBHASHKEY(&in6addr_any), lport, 0,
1080 pcbinfo->ipi_wildmask)];
1081 CK_LIST_FOREACH(inp, head, inp_pcbgroup_wild) {
1082 /* XXX inp locking */
1083 if ((inp->inp_vflag & INP_IPV6) == 0)
1084 continue;
1085
1086 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
1087 inp->inp_lport != lport) {
1088 continue;
1089 }
1090
1091 injail = prison_flag(inp->inp_cred, PR_IP6);
1092 if (injail) {
1093 if (prison_check_ip6(inp->inp_cred,
1094 laddr) != 0)
1095 continue;
1096 } else {
1097 if (local_exact != NULL)
1098 continue;
1099 }
1100
1101 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
1102 if (injail)
1103 goto found;
1104 else
1105 local_exact = inp;
1106 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1107 if (injail)
1108 jail_wild = inp;
1109 else
1110 local_wild = inp;
1111 }
1112 } /* LIST_FOREACH */
1113
1114 inp = jail_wild;
1115 if (inp == NULL)
1116 inp = jail_wild;
1117 if (inp == NULL)
1118 inp = local_exact;
1119 if (inp == NULL)
1120 inp = local_wild;
1121 if (inp != NULL)
1122 goto found;
1123 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1124 INP_GROUP_UNLOCK(pcbgroup);
1125 return (NULL);
1126
1127 found:
1128 if (lookupflags & INPLOOKUP_WLOCKPCB)
1129 locked = INP_TRY_WLOCK(inp);
1130 else if (lookupflags & INPLOOKUP_RLOCKPCB)
1131 locked = INP_TRY_RLOCK(inp);
1132 else
1133 panic("%s: locking buf", __func__);
1134 if (!locked)
1135 in_pcbref(inp);
1136 INP_GROUP_UNLOCK(pcbgroup);
1137 if (!locked) {
1138 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1139 INP_WLOCK(inp);
1140 if (in_pcbrele_wlocked(inp))
1141 return (NULL);
1142 } else {
1143 INP_RLOCK(inp);
1144 if (in_pcbrele_rlocked(inp))
1145 return (NULL);
1146 }
1147 }
1148 #ifdef INVARIANTS
1149 if (lookupflags & INPLOOKUP_WLOCKPCB)
1150 INP_WLOCK_ASSERT(inp);
1151 else
1152 INP_RLOCK_ASSERT(inp);
1153 #endif
1154 return (inp);
1155 }
1156 #endif /* PCBGROUP */
1157
1158 /*
1159 * Lookup PCB in hash list. Used in in_pcb.c as well as here.
1160 */
1161 struct inpcb *
1162 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1163 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
1164 int lookupflags, struct ifnet *ifp, uint8_t numa_domain)
1165 {
1166 struct inpcbhead *head;
1167 struct inpcb *inp, *tmpinp;
1168 u_short fport = fport_arg, lport = lport_arg;
1169
1170 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
1171 ("%s: invalid lookup flags %d", __func__, lookupflags));
1172
1173 INP_HASH_LOCK_ASSERT(pcbinfo);
1174
1175 /*
1176 * First look for an exact match.
1177 */
1178 tmpinp = NULL;
1179 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(
1180 INP6_PCBHASHKEY(faddr), lport, fport, pcbinfo->ipi_hashmask)];
1181 CK_LIST_FOREACH(inp, head, inp_hash) {
1182 /* XXX inp locking */
1183 if ((inp->inp_vflag & INP_IPV6) == 0)
1184 continue;
1185 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1186 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1187 inp->inp_fport == fport &&
1188 inp->inp_lport == lport) {
1189 /*
1190 * XXX We should be able to directly return
1191 * the inp here, without any checks.
1192 * Well unless both bound with SO_REUSEPORT?
1193 */
1194 if (prison_flag(inp->inp_cred, PR_IP6))
1195 return (inp);
1196 if (tmpinp == NULL)
1197 tmpinp = inp;
1198 }
1199 }
1200 if (tmpinp != NULL)
1201 return (tmpinp);
1202
1203 /*
1204 * Then look in lb group (for wildcard match).
1205 */
1206 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1207 inp = in6_pcblookup_lbgroup(pcbinfo, laddr, lport, faddr,
1208 fport, lookupflags, numa_domain);
1209 if (inp != NULL)
1210 return (inp);
1211 }
1212
1213 /*
1214 * Then look for a wildcard match, if requested.
1215 */
1216 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1217 struct inpcb *local_wild = NULL, *local_exact = NULL;
1218 struct inpcb *jail_wild = NULL;
1219 int injail;
1220
1221 /*
1222 * Order of socket selection - we always prefer jails.
1223 * 1. jailed, non-wild.
1224 * 2. jailed, wild.
1225 * 3. non-jailed, non-wild.
1226 * 4. non-jailed, wild.
1227 */
1228 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(
1229 INP6_PCBHASHKEY(&in6addr_any), lport, 0,
1230 pcbinfo->ipi_hashmask)];
1231 CK_LIST_FOREACH(inp, head, inp_hash) {
1232 /* XXX inp locking */
1233 if ((inp->inp_vflag & INP_IPV6) == 0)
1234 continue;
1235
1236 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
1237 inp->inp_lport != lport) {
1238 continue;
1239 }
1240
1241 injail = prison_flag(inp->inp_cred, PR_IP6);
1242 if (injail) {
1243 if (prison_check_ip6(inp->inp_cred,
1244 laddr) != 0)
1245 continue;
1246 } else {
1247 if (local_exact != NULL)
1248 continue;
1249 }
1250
1251 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
1252 if (injail)
1253 return (inp);
1254 else
1255 local_exact = inp;
1256 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1257 if (injail)
1258 jail_wild = inp;
1259 else
1260 local_wild = inp;
1261 }
1262 } /* LIST_FOREACH */
1263
1264 if (jail_wild != NULL)
1265 return (jail_wild);
1266 if (local_exact != NULL)
1267 return (local_exact);
1268 if (local_wild != NULL)
1269 return (local_wild);
1270 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1271
1272 /*
1273 * Not found.
1274 */
1275 return (NULL);
1276 }
1277
1278 /*
1279 * Lookup PCB in hash list, using pcbinfo tables. This variation locks the
1280 * hash list lock, and will return the inpcb locked (i.e., requires
1281 * INPLOOKUP_LOCKPCB).
1282 */
1283 static struct inpcb *
1284 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1285 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1286 struct ifnet *ifp, uint8_t numa_domain)
1287 {
1288 struct inpcb *inp;
1289
1290 inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport,
1291 (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp,
1292 numa_domain);
1293 if (inp != NULL) {
1294 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1295 INP_WLOCK(inp);
1296 if (__predict_false(inp->inp_flags2 & INP_FREED)) {
1297 INP_WUNLOCK(inp);
1298 inp = NULL;
1299 }
1300 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1301 INP_RLOCK(inp);
1302 if (__predict_false(inp->inp_flags2 & INP_FREED)) {
1303 INP_RUNLOCK(inp);
1304 inp = NULL;
1305 }
1306 } else
1307 panic("%s: locking bug", __func__);
1308 #ifdef INVARIANTS
1309 if (inp != NULL) {
1310 if (lookupflags & INPLOOKUP_WLOCKPCB)
1311 INP_WLOCK_ASSERT(inp);
1312 else
1313 INP_RLOCK_ASSERT(inp);
1314 }
1315 #endif
1316 }
1317 return (inp);
1318 }
1319
1320 /*
1321 * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf
1322 * from which a pre-calculated hash value may be extracted.
1323 *
1324 * Possibly more of this logic should be in in6_pcbgroup.c.
1325 */
1326 struct inpcb *
1327 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport,
1328 struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp)
1329 {
1330 #if defined(PCBGROUP) && !defined(RSS)
1331 struct inpcbgroup *pcbgroup;
1332 #endif
1333
1334 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1335 ("%s: invalid lookup flags %d", __func__, lookupflags));
1336 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1337 ("%s: LOCKPCB not set", __func__));
1338
1339 /*
1340 * When not using RSS, use connection groups in preference to the
1341 * reservation table when looking up 4-tuples. When using RSS, just
1342 * use the reservation table, due to the cost of the Toeplitz hash
1343 * in software.
1344 *
1345 * XXXRW: This policy belongs in the pcbgroup code, as in principle
1346 * we could be doing RSS with a non-Toeplitz hash that is affordable
1347 * in software.
1348 */
1349 #if defined(PCBGROUP) && !defined(RSS)
1350 if (in_pcbgroup_enabled(pcbinfo)) {
1351 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1352 fport);
1353 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1354 laddr, lport, lookupflags, ifp));
1355 }
1356 #endif
1357 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1358 lookupflags, ifp, M_NODOM));
1359 }
1360
1361 struct inpcb *
1362 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1363 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1364 struct ifnet *ifp, struct mbuf *m)
1365 {
1366 #ifdef PCBGROUP
1367 struct inpcbgroup *pcbgroup;
1368 #endif
1369
1370 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1371 ("%s: invalid lookup flags %d", __func__, lookupflags));
1372 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1373 ("%s: LOCKPCB not set", __func__));
1374
1375 #ifdef PCBGROUP
1376 /*
1377 * If we can use a hardware-generated hash to look up the connection
1378 * group, use that connection group to find the inpcb. Otherwise
1379 * fall back on a software hash -- or the reservation table if we're
1380 * using RSS.
1381 *
1382 * XXXRW: As above, that policy belongs in the pcbgroup code.
1383 */
1384 if (in_pcbgroup_enabled(pcbinfo) &&
1385 M_HASHTYPE_TEST(m, M_HASHTYPE_NONE) == 0) {
1386 pcbgroup = in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m),
1387 m->m_pkthdr.flowid);
1388 if (pcbgroup != NULL)
1389 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr,
1390 fport, laddr, lport, lookupflags, ifp));
1391 #ifndef RSS
1392 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1393 fport);
1394 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1395 laddr, lport, lookupflags, ifp));
1396 #endif
1397 }
1398 #endif
1399 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1400 lookupflags, ifp, m->m_pkthdr.numa_domain));
1401 }
1402
1403 void
1404 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m, int srcordst)
1405 {
1406 struct ip6_hdr *ip;
1407
1408 ip = mtod(m, struct ip6_hdr *);
1409 bzero(sin6, sizeof(*sin6));
1410 sin6->sin6_len = sizeof(*sin6);
1411 sin6->sin6_family = AF_INET6;
1412 sin6->sin6_addr = srcordst ? ip->ip6_dst : ip->ip6_src;
1413
1414 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */
1415
1416 return;
1417 }
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