1 /*-
2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
3 * Copyright (c) 2010-2011 Juniper Networks, Inc.
4 * All rights reserved.
5 *
6 * Portions of this software were developed by Robert N. M. Watson under
7 * contract to Juniper Networks, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $
34 */
35
36 /*-
37 * Copyright (c) 1982, 1986, 1991, 1993
38 * The Regents of the University of California. All rights reserved.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 * 1. Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * 2. Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in the
47 * documentation and/or other materials provided with the distribution.
48 * 4. Neither the name of the University nor the names of its contributors
49 * may be used to endorse or promote products derived from this software
50 * without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * SUCH DAMAGE.
63 *
64 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94
65 */
66
67 #include <sys/cdefs.h>
68 __FBSDID("$FreeBSD$");
69
70 #include "opt_inet.h"
71 #include "opt_inet6.h"
72 #include "opt_ipsec.h"
73 #include "opt_pcbgroup.h"
74 #include "opt_rss.h"
75
76 #include <sys/param.h>
77 #include <sys/systm.h>
78 #include <sys/malloc.h>
79 #include <sys/mbuf.h>
80 #include <sys/domain.h>
81 #include <sys/protosw.h>
82 #include <sys/socket.h>
83 #include <sys/socketvar.h>
84 #include <sys/sockio.h>
85 #include <sys/errno.h>
86 #include <sys/time.h>
87 #include <sys/priv.h>
88 #include <sys/proc.h>
89 #include <sys/jail.h>
90
91 #include <vm/uma.h>
92
93 #include <net/if.h>
94 #include <net/if_var.h>
95 #include <net/if_types.h>
96 #include <net/route.h>
97
98 #include <netinet/in.h>
99 #include <netinet/in_var.h>
100 #include <netinet/in_systm.h>
101 #include <netinet/tcp_var.h>
102 #include <netinet/ip6.h>
103 #include <netinet/ip_var.h>
104
105 #include <netinet6/ip6_var.h>
106 #include <netinet6/nd6.h>
107 #include <netinet/in_pcb.h>
108 #include <netinet6/in6_pcb.h>
109 #include <netinet6/scope6_var.h>
110
111 static struct inpcb *in6_pcblookup_hash_locked(struct inpcbinfo *,
112 struct in6_addr *, u_int, struct in6_addr *, u_int, int, struct ifnet *);
113
114 int
in6_pcbbind(register struct inpcb * inp,struct sockaddr * nam,struct ucred * cred)115 in6_pcbbind(register struct inpcb *inp, struct sockaddr *nam,
116 struct ucred *cred)
117 {
118 struct socket *so = inp->inp_socket;
119 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
120 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
121 u_short lport = 0;
122 int error, lookupflags = 0;
123 int reuseport = (so->so_options & SO_REUSEPORT);
124
125 INP_WLOCK_ASSERT(inp);
126 INP_HASH_WLOCK_ASSERT(pcbinfo);
127
128 if (TAILQ_EMPTY(&V_in6_ifaddrhead)) /* XXX broken! */
129 return (EADDRNOTAVAIL);
130 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
131 return (EINVAL);
132 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
133 lookupflags = INPLOOKUP_WILDCARD;
134 if (nam == NULL) {
135 if ((error = prison_local_ip6(cred, &inp->in6p_laddr,
136 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
137 return (error);
138 } else {
139 sin6 = (struct sockaddr_in6 *)nam;
140 if (nam->sa_len != sizeof(*sin6))
141 return (EINVAL);
142 /*
143 * family check.
144 */
145 if (nam->sa_family != AF_INET6)
146 return (EAFNOSUPPORT);
147
148 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
149 return(error);
150
151 if ((error = prison_local_ip6(cred, &sin6->sin6_addr,
152 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
153 return (error);
154
155 lport = sin6->sin6_port;
156 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
157 /*
158 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
159 * allow compepte duplication of binding if
160 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
161 * and a multicast address is bound on both
162 * new and duplicated sockets.
163 */
164 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) != 0)
165 reuseport = SO_REUSEADDR|SO_REUSEPORT;
166 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
167 struct ifaddr *ifa;
168
169 sin6->sin6_port = 0; /* yech... */
170 if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) ==
171 NULL &&
172 (inp->inp_flags & INP_BINDANY) == 0) {
173 return (EADDRNOTAVAIL);
174 }
175
176 /*
177 * XXX: bind to an anycast address might accidentally
178 * cause sending a packet with anycast source address.
179 * We should allow to bind to a deprecated address, since
180 * the application dares to use it.
181 */
182 if (ifa != NULL &&
183 ((struct in6_ifaddr *)ifa)->ia6_flags &
184 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
185 ifa_free(ifa);
186 return (EADDRNOTAVAIL);
187 }
188 if (ifa != NULL)
189 ifa_free(ifa);
190 }
191 if (lport) {
192 struct inpcb *t;
193 struct tcptw *tw;
194
195 /* GROSS */
196 if (ntohs(lport) <= V_ipport_reservedhigh &&
197 ntohs(lport) >= V_ipport_reservedlow &&
198 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
199 0))
200 return (EACCES);
201 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
202 priv_check_cred(inp->inp_cred,
203 PRIV_NETINET_REUSEPORT, 0) != 0) {
204 t = in6_pcblookup_local(pcbinfo,
205 &sin6->sin6_addr, lport,
206 INPLOOKUP_WILDCARD, cred);
207 if (t &&
208 ((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
209 ((t->inp_flags & INP_TIMEWAIT) == 0) &&
210 (so->so_type != SOCK_STREAM ||
211 IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) &&
212 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
213 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
214 (t->inp_flags2 & INP_REUSEPORT) == 0) &&
215 (inp->inp_cred->cr_uid !=
216 t->inp_cred->cr_uid))
217 return (EADDRINUSE);
218
219 /*
220 * If the socket is a BINDMULTI socket, then
221 * the credentials need to match and the
222 * original socket also has to have been bound
223 * with BINDMULTI.
224 */
225 if (t && (! in_pcbbind_check_bindmulti(inp, t)))
226 return (EADDRINUSE);
227
228 #ifdef INET
229 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
230 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
231 struct sockaddr_in sin;
232
233 in6_sin6_2_sin(&sin, sin6);
234 t = in_pcblookup_local(pcbinfo,
235 sin.sin_addr, lport,
236 INPLOOKUP_WILDCARD, cred);
237 if (t &&
238 ((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
239 ((t->inp_flags &
240 INP_TIMEWAIT) == 0) &&
241 (so->so_type != SOCK_STREAM ||
242 ntohl(t->inp_faddr.s_addr) ==
243 INADDR_ANY) &&
244 (inp->inp_cred->cr_uid !=
245 t->inp_cred->cr_uid))
246 return (EADDRINUSE);
247
248 if (t && (! in_pcbbind_check_bindmulti(inp, t)))
249 return (EADDRINUSE);
250 }
251 #endif
252 }
253 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
254 lport, lookupflags, cred);
255 if (t && (t->inp_flags & INP_TIMEWAIT)) {
256 /*
257 * XXXRW: If an incpb has had its timewait
258 * state recycled, we treat the address as
259 * being in use (for now). This is better
260 * than a panic, but not desirable.
261 */
262 tw = intotw(t);
263 if (tw == NULL ||
264 (reuseport & tw->tw_so_options) == 0)
265 return (EADDRINUSE);
266 } else if (t && (reuseport & inp_so_options(t)) == 0) {
267 return (EADDRINUSE);
268 }
269 #ifdef INET
270 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
271 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
272 struct sockaddr_in sin;
273
274 in6_sin6_2_sin(&sin, sin6);
275 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
276 lport, lookupflags, cred);
277 if (t && t->inp_flags & INP_TIMEWAIT) {
278 tw = intotw(t);
279 if (tw == NULL)
280 return (EADDRINUSE);
281 if ((reuseport & tw->tw_so_options) == 0
282 && (ntohl(t->inp_laddr.s_addr) !=
283 INADDR_ANY || ((inp->inp_vflag &
284 INP_IPV6PROTO) ==
285 (t->inp_vflag & INP_IPV6PROTO))))
286 return (EADDRINUSE);
287 } else if (t &&
288 (reuseport & inp_so_options(t)) == 0 &&
289 (ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
290 (t->inp_vflag & INP_IPV6PROTO) != 0))
291 return (EADDRINUSE);
292 }
293 #endif
294 }
295 inp->in6p_laddr = sin6->sin6_addr;
296 }
297 if (lport == 0) {
298 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) {
299 /* Undo an address bind that may have occurred. */
300 inp->in6p_laddr = in6addr_any;
301 return (error);
302 }
303 } else {
304 inp->inp_lport = lport;
305 if (in_pcbinshash(inp) != 0) {
306 inp->in6p_laddr = in6addr_any;
307 inp->inp_lport = 0;
308 return (EAGAIN);
309 }
310 }
311 return (0);
312 }
313
314 /*
315 * Transform old in6_pcbconnect() into an inner subroutine for new
316 * in6_pcbconnect(): Do some validity-checking on the remote
317 * address (in mbuf 'nam') and then determine local host address
318 * (i.e., which interface) to use to access that remote host.
319 *
320 * This preserves definition of in6_pcbconnect(), while supporting a
321 * slightly different version for T/TCP. (This is more than
322 * a bit of a kludge, but cleaning up the internal interfaces would
323 * have forced minor changes in every protocol).
324 */
325 static int
in6_pcbladdr(register struct inpcb * inp,struct sockaddr * nam,struct in6_addr * plocal_addr6)326 in6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam,
327 struct in6_addr *plocal_addr6)
328 {
329 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
330 int error = 0;
331 int scope_ambiguous = 0;
332 struct in6_addr in6a;
333
334 INP_WLOCK_ASSERT(inp);
335 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); /* XXXRW: why? */
336
337 if (nam->sa_len != sizeof (*sin6))
338 return (EINVAL);
339 if (sin6->sin6_family != AF_INET6)
340 return (EAFNOSUPPORT);
341 if (sin6->sin6_port == 0)
342 return (EADDRNOTAVAIL);
343
344 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
345 scope_ambiguous = 1;
346 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
347 return(error);
348
349 if (!TAILQ_EMPTY(&V_in6_ifaddrhead)) {
350 /*
351 * If the destination address is UNSPECIFIED addr,
352 * use the loopback addr, e.g ::1.
353 */
354 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
355 sin6->sin6_addr = in6addr_loopback;
356 }
357 if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0)
358 return (error);
359
360 error = in6_selectsrc_socket(sin6, inp->in6p_outputopts,
361 inp, inp->inp_cred, scope_ambiguous, &in6a, NULL);
362 if (error)
363 return (error);
364
365 /*
366 * Do not update this earlier, in case we return with an error.
367 *
368 * XXX: this in6_selectsrc_socket result might replace the bound local
369 * address with the address specified by setsockopt(IPV6_PKTINFO).
370 * Is it the intended behavior?
371 */
372 *plocal_addr6 = in6a;
373
374 /*
375 * Don't do pcblookup call here; return interface in
376 * plocal_addr6
377 * and exit to caller, that will do the lookup.
378 */
379
380 return (0);
381 }
382
383 /*
384 * Outer subroutine:
385 * Connect from a socket to a specified address.
386 * Both address and port must be specified in argument sin.
387 * If don't have a local address for this socket yet,
388 * then pick one.
389 */
390 int
in6_pcbconnect_mbuf(register struct inpcb * inp,struct sockaddr * nam,struct ucred * cred,struct mbuf * m)391 in6_pcbconnect_mbuf(register struct inpcb *inp, struct sockaddr *nam,
392 struct ucred *cred, struct mbuf *m)
393 {
394 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
395 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
396 struct in6_addr addr6;
397 int error;
398
399 INP_WLOCK_ASSERT(inp);
400 INP_HASH_WLOCK_ASSERT(pcbinfo);
401
402 /*
403 * Call inner routine, to assign local interface address.
404 * in6_pcbladdr() may automatically fill in sin6_scope_id.
405 */
406 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
407 return (error);
408
409 if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr,
410 sin6->sin6_port,
411 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
412 ? &addr6 : &inp->in6p_laddr,
413 inp->inp_lport, 0, NULL) != NULL) {
414 return (EADDRINUSE);
415 }
416 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
417 if (inp->inp_lport == 0) {
418 error = in6_pcbbind(inp, (struct sockaddr *)0, cred);
419 if (error)
420 return (error);
421 }
422 inp->in6p_laddr = addr6;
423 }
424 inp->in6p_faddr = sin6->sin6_addr;
425 inp->inp_fport = sin6->sin6_port;
426 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
427 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
428 if (inp->inp_flags & IN6P_AUTOFLOWLABEL)
429 inp->inp_flow |=
430 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
431
432 in_pcbrehash_mbuf(inp, m);
433
434 return (0);
435 }
436
437 int
in6_pcbconnect(struct inpcb * inp,struct sockaddr * nam,struct ucred * cred)438 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
439 {
440
441 return (in6_pcbconnect_mbuf(inp, nam, cred, NULL));
442 }
443
444 void
in6_pcbdisconnect(struct inpcb * inp)445 in6_pcbdisconnect(struct inpcb *inp)
446 {
447
448 INP_WLOCK_ASSERT(inp);
449 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
450
451 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
452 inp->inp_fport = 0;
453 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
454 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
455 in_pcbrehash(inp);
456 }
457
458 struct sockaddr *
in6_sockaddr(in_port_t port,struct in6_addr * addr_p)459 in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
460 {
461 struct sockaddr_in6 *sin6;
462
463 sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK);
464 bzero(sin6, sizeof *sin6);
465 sin6->sin6_family = AF_INET6;
466 sin6->sin6_len = sizeof(*sin6);
467 sin6->sin6_port = port;
468 sin6->sin6_addr = *addr_p;
469 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
470
471 return (struct sockaddr *)sin6;
472 }
473
474 struct sockaddr *
in6_v4mapsin6_sockaddr(in_port_t port,struct in_addr * addr_p)475 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p)
476 {
477 struct sockaddr_in sin;
478 struct sockaddr_in6 *sin6_p;
479
480 bzero(&sin, sizeof sin);
481 sin.sin_family = AF_INET;
482 sin.sin_len = sizeof(sin);
483 sin.sin_port = port;
484 sin.sin_addr = *addr_p;
485
486 sin6_p = malloc(sizeof *sin6_p, M_SONAME,
487 M_WAITOK);
488 in6_sin_2_v4mapsin6(&sin, sin6_p);
489
490 return (struct sockaddr *)sin6_p;
491 }
492
493 int
in6_getsockaddr(struct socket * so,struct sockaddr ** nam)494 in6_getsockaddr(struct socket *so, struct sockaddr **nam)
495 {
496 register struct inpcb *inp;
497 struct in6_addr addr;
498 in_port_t port;
499
500 inp = sotoinpcb(so);
501 KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL"));
502
503 INP_RLOCK(inp);
504 port = inp->inp_lport;
505 addr = inp->in6p_laddr;
506 INP_RUNLOCK(inp);
507
508 *nam = in6_sockaddr(port, &addr);
509 return 0;
510 }
511
512 int
in6_getpeeraddr(struct socket * so,struct sockaddr ** nam)513 in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
514 {
515 struct inpcb *inp;
516 struct in6_addr addr;
517 in_port_t port;
518
519 inp = sotoinpcb(so);
520 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL"));
521
522 INP_RLOCK(inp);
523 port = inp->inp_fport;
524 addr = inp->in6p_faddr;
525 INP_RUNLOCK(inp);
526
527 *nam = in6_sockaddr(port, &addr);
528 return 0;
529 }
530
531 int
in6_mapped_sockaddr(struct socket * so,struct sockaddr ** nam)532 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
533 {
534 struct inpcb *inp;
535 int error;
536
537 inp = sotoinpcb(so);
538 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL"));
539
540 #ifdef INET
541 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
542 error = in_getsockaddr(so, nam);
543 if (error == 0)
544 in6_sin_2_v4mapsin6_in_sock(nam);
545 } else
546 #endif
547 {
548 /* scope issues will be handled in in6_getsockaddr(). */
549 error = in6_getsockaddr(so, nam);
550 }
551
552 return error;
553 }
554
555 int
in6_mapped_peeraddr(struct socket * so,struct sockaddr ** nam)556 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
557 {
558 struct inpcb *inp;
559 int error;
560
561 inp = sotoinpcb(so);
562 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL"));
563
564 #ifdef INET
565 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
566 error = in_getpeeraddr(so, nam);
567 if (error == 0)
568 in6_sin_2_v4mapsin6_in_sock(nam);
569 } else
570 #endif
571 /* scope issues will be handled in in6_getpeeraddr(). */
572 error = in6_getpeeraddr(so, nam);
573
574 return error;
575 }
576
577 /*
578 * Pass some notification to all connections of a protocol
579 * associated with address dst. The local address and/or port numbers
580 * may be specified to limit the search. The "usual action" will be
581 * taken, depending on the ctlinput cmd. The caller must filter any
582 * cmds that are uninteresting (e.g., no error in the map).
583 * Call the protocol specific routine (if any) to report
584 * any errors for each matching socket.
585 */
586 void
in6_pcbnotify(struct inpcbinfo * pcbinfo,struct sockaddr * dst,u_int fport_arg,const struct sockaddr * src,u_int lport_arg,int cmd,void * cmdarg,struct inpcb * (* notify)(struct inpcb *,int))587 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst,
588 u_int fport_arg, const struct sockaddr *src, u_int lport_arg,
589 int cmd, void *cmdarg,
590 struct inpcb *(*notify)(struct inpcb *, int))
591 {
592 struct inpcb *inp, *inp_temp;
593 struct sockaddr_in6 sa6_src, *sa6_dst;
594 u_short fport = fport_arg, lport = lport_arg;
595 u_int32_t flowinfo;
596 int errno;
597
598 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
599 return;
600
601 sa6_dst = (struct sockaddr_in6 *)dst;
602 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
603 return;
604
605 /*
606 * note that src can be NULL when we get notify by local fragmentation.
607 */
608 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
609 flowinfo = sa6_src.sin6_flowinfo;
610
611 /*
612 * Redirects go to all references to the destination,
613 * and use in6_rtchange to invalidate the route cache.
614 * Dead host indications: also use in6_rtchange to invalidate
615 * the cache, and deliver the error to all the sockets.
616 * Otherwise, if we have knowledge of the local port and address,
617 * deliver only to that socket.
618 */
619 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
620 fport = 0;
621 lport = 0;
622 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
623
624 if (cmd != PRC_HOSTDEAD)
625 notify = in6_rtchange;
626 }
627 errno = inet6ctlerrmap[cmd];
628 INP_INFO_WLOCK(pcbinfo);
629 LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
630 INP_WLOCK(inp);
631 if ((inp->inp_vflag & INP_IPV6) == 0) {
632 INP_WUNLOCK(inp);
633 continue;
634 }
635
636 /*
637 * If the error designates a new path MTU for a destination
638 * and the application (associated with this socket) wanted to
639 * know the value, notify.
640 * XXX: should we avoid to notify the value to TCP sockets?
641 */
642 if (cmd == PRC_MSGSIZE && cmdarg != NULL)
643 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst,
644 *(u_int32_t *)cmdarg);
645
646 /*
647 * Detect if we should notify the error. If no source and
648 * destination ports are specifed, but non-zero flowinfo and
649 * local address match, notify the error. This is the case
650 * when the error is delivered with an encrypted buffer
651 * by ESP. Otherwise, just compare addresses and ports
652 * as usual.
653 */
654 if (lport == 0 && fport == 0 && flowinfo &&
655 inp->inp_socket != NULL &&
656 flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) &&
657 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
658 goto do_notify;
659 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
660 &sa6_dst->sin6_addr) ||
661 inp->inp_socket == 0 ||
662 (lport && inp->inp_lport != lport) ||
663 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
664 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
665 &sa6_src.sin6_addr)) ||
666 (fport && inp->inp_fport != fport)) {
667 INP_WUNLOCK(inp);
668 continue;
669 }
670
671 do_notify:
672 if (notify) {
673 if ((*notify)(inp, errno))
674 INP_WUNLOCK(inp);
675 } else
676 INP_WUNLOCK(inp);
677 }
678 INP_INFO_WUNLOCK(pcbinfo);
679 }
680
681 /*
682 * Lookup a PCB based on the local address and port. Caller must hold the
683 * hash lock. No inpcb locks or references are acquired.
684 */
685 struct inpcb *
in6_pcblookup_local(struct inpcbinfo * pcbinfo,struct in6_addr * laddr,u_short lport,int lookupflags,struct ucred * cred)686 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
687 u_short lport, int lookupflags, struct ucred *cred)
688 {
689 register struct inpcb *inp;
690 int matchwild = 3, wildcard;
691
692 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
693 ("%s: invalid lookup flags %d", __func__, lookupflags));
694
695 INP_HASH_WLOCK_ASSERT(pcbinfo);
696
697 if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
698 struct inpcbhead *head;
699 /*
700 * Look for an unconnected (wildcard foreign addr) PCB that
701 * matches the local address and port we're looking for.
702 */
703 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(
704 INP6_PCBHASHKEY(&in6addr_any), lport, 0,
705 pcbinfo->ipi_hashmask)];
706 LIST_FOREACH(inp, head, inp_hash) {
707 /* XXX inp locking */
708 if ((inp->inp_vflag & INP_IPV6) == 0)
709 continue;
710 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
711 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
712 inp->inp_lport == lport) {
713 /* Found. */
714 if (cred == NULL ||
715 prison_equal_ip6(cred->cr_prison,
716 inp->inp_cred->cr_prison))
717 return (inp);
718 }
719 }
720 /*
721 * Not found.
722 */
723 return (NULL);
724 } else {
725 struct inpcbporthead *porthash;
726 struct inpcbport *phd;
727 struct inpcb *match = NULL;
728 /*
729 * Best fit PCB lookup.
730 *
731 * First see if this local port is in use by looking on the
732 * port hash list.
733 */
734 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
735 pcbinfo->ipi_porthashmask)];
736 LIST_FOREACH(phd, porthash, phd_hash) {
737 if (phd->phd_port == lport)
738 break;
739 }
740 if (phd != NULL) {
741 /*
742 * Port is in use by one or more PCBs. Look for best
743 * fit.
744 */
745 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
746 wildcard = 0;
747 if (cred != NULL &&
748 !prison_equal_ip6(cred->cr_prison,
749 inp->inp_cred->cr_prison))
750 continue;
751 /* XXX inp locking */
752 if ((inp->inp_vflag & INP_IPV6) == 0)
753 continue;
754 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
755 wildcard++;
756 if (!IN6_IS_ADDR_UNSPECIFIED(
757 &inp->in6p_laddr)) {
758 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
759 wildcard++;
760 else if (!IN6_ARE_ADDR_EQUAL(
761 &inp->in6p_laddr, laddr))
762 continue;
763 } else {
764 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
765 wildcard++;
766 }
767 if (wildcard < matchwild) {
768 match = inp;
769 matchwild = wildcard;
770 if (matchwild == 0)
771 break;
772 }
773 }
774 }
775 return (match);
776 }
777 }
778
779 void
in6_pcbpurgeif0(struct inpcbinfo * pcbinfo,struct ifnet * ifp)780 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
781 {
782 struct inpcb *in6p;
783 struct ip6_moptions *im6o;
784 int i, gap;
785
786 INP_INFO_WLOCK(pcbinfo);
787 LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) {
788 INP_WLOCK(in6p);
789 im6o = in6p->in6p_moptions;
790 if ((in6p->inp_vflag & INP_IPV6) && im6o != NULL) {
791 /*
792 * Unselect the outgoing ifp for multicast if it
793 * is being detached.
794 */
795 if (im6o->im6o_multicast_ifp == ifp)
796 im6o->im6o_multicast_ifp = NULL;
797 /*
798 * Drop multicast group membership if we joined
799 * through the interface being detached.
800 */
801 gap = 0;
802 for (i = 0; i < im6o->im6o_num_memberships; i++) {
803 if (im6o->im6o_membership[i]->in6m_ifp ==
804 ifp) {
805 in6_mc_leave(im6o->im6o_membership[i],
806 NULL);
807 gap++;
808 } else if (gap != 0) {
809 im6o->im6o_membership[i - gap] =
810 im6o->im6o_membership[i];
811 }
812 }
813 im6o->im6o_num_memberships -= gap;
814 }
815 INP_WUNLOCK(in6p);
816 }
817 INP_INFO_WUNLOCK(pcbinfo);
818 }
819
820 /*
821 * Check for alternatives when higher level complains
822 * about service problems. For now, invalidate cached
823 * routing information. If the route was created dynamically
824 * (by a redirect), time to try a default gateway again.
825 */
826 void
in6_losing(struct inpcb * in6p)827 in6_losing(struct inpcb *in6p)
828 {
829
830 /*
831 * We don't store route pointers in the routing table anymore
832 */
833 return;
834 }
835
836 /*
837 * After a routing change, flush old routing
838 * and allocate a (hopefully) better one.
839 */
840 struct inpcb *
in6_rtchange(struct inpcb * inp,int errno)841 in6_rtchange(struct inpcb *inp, int errno)
842 {
843 /*
844 * We don't store route pointers in the routing table anymore
845 */
846 return inp;
847 }
848
849 #ifdef PCBGROUP
850 /*
851 * Lookup PCB in hash list, using pcbgroup tables.
852 */
853 static struct inpcb *
in6_pcblookup_group(struct inpcbinfo * pcbinfo,struct inpcbgroup * pcbgroup,struct in6_addr * faddr,u_int fport_arg,struct in6_addr * laddr,u_int lport_arg,int lookupflags,struct ifnet * ifp)854 in6_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup,
855 struct in6_addr *faddr, u_int fport_arg, struct in6_addr *laddr,
856 u_int lport_arg, int lookupflags, struct ifnet *ifp)
857 {
858 struct inpcbhead *head;
859 struct inpcb *inp, *tmpinp;
860 u_short fport = fport_arg, lport = lport_arg;
861
862 /*
863 * First look for an exact match.
864 */
865 tmpinp = NULL;
866 INP_GROUP_LOCK(pcbgroup);
867 head = &pcbgroup->ipg_hashbase[INP_PCBHASH(
868 INP6_PCBHASHKEY(faddr), lport, fport, pcbgroup->ipg_hashmask)];
869 LIST_FOREACH(inp, head, inp_pcbgrouphash) {
870 /* XXX inp locking */
871 if ((inp->inp_vflag & INP_IPV6) == 0)
872 continue;
873 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
874 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
875 inp->inp_fport == fport &&
876 inp->inp_lport == lport) {
877 /*
878 * XXX We should be able to directly return
879 * the inp here, without any checks.
880 * Well unless both bound with SO_REUSEPORT?
881 */
882 if (prison_flag(inp->inp_cred, PR_IP6))
883 goto found;
884 if (tmpinp == NULL)
885 tmpinp = inp;
886 }
887 }
888 if (tmpinp != NULL) {
889 inp = tmpinp;
890 goto found;
891 }
892
893 /*
894 * Then look for a wildcard match in the pcbgroup.
895 */
896 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
897 struct inpcb *local_wild = NULL, *local_exact = NULL;
898 struct inpcb *jail_wild = NULL;
899 int injail;
900
901 /*
902 * Order of socket selection - we always prefer jails.
903 * 1. jailed, non-wild.
904 * 2. jailed, wild.
905 * 3. non-jailed, non-wild.
906 * 4. non-jailed, wild.
907 */
908 head = &pcbgroup->ipg_hashbase[
909 INP_PCBHASH(INADDR_ANY, lport, 0, pcbgroup->ipg_hashmask)];
910 LIST_FOREACH(inp, head, inp_pcbgrouphash) {
911 /* XXX inp locking */
912 if ((inp->inp_vflag & INP_IPV6) == 0)
913 continue;
914
915 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
916 inp->inp_lport != lport) {
917 continue;
918 }
919
920 injail = prison_flag(inp->inp_cred, PR_IP6);
921 if (injail) {
922 if (prison_check_ip6(inp->inp_cred,
923 laddr) != 0)
924 continue;
925 } else {
926 if (local_exact != NULL)
927 continue;
928 }
929
930 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
931 if (injail)
932 goto found;
933 else
934 local_exact = inp;
935 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
936 if (injail)
937 jail_wild = inp;
938 else
939 local_wild = inp;
940 }
941 } /* LIST_FOREACH */
942
943 inp = jail_wild;
944 if (inp == NULL)
945 inp = jail_wild;
946 if (inp == NULL)
947 inp = local_exact;
948 if (inp == NULL)
949 inp = local_wild;
950 if (inp != NULL)
951 goto found;
952 }
953
954 /*
955 * Then look for a wildcard match, if requested.
956 */
957 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
958 struct inpcb *local_wild = NULL, *local_exact = NULL;
959 struct inpcb *jail_wild = NULL;
960 int injail;
961
962 /*
963 * Order of socket selection - we always prefer jails.
964 * 1. jailed, non-wild.
965 * 2. jailed, wild.
966 * 3. non-jailed, non-wild.
967 * 4. non-jailed, wild.
968 */
969 head = &pcbinfo->ipi_wildbase[INP_PCBHASH(
970 INP6_PCBHASHKEY(&in6addr_any), lport, 0,
971 pcbinfo->ipi_wildmask)];
972 LIST_FOREACH(inp, head, inp_pcbgroup_wild) {
973 /* XXX inp locking */
974 if ((inp->inp_vflag & INP_IPV6) == 0)
975 continue;
976
977 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
978 inp->inp_lport != lport) {
979 continue;
980 }
981
982 injail = prison_flag(inp->inp_cred, PR_IP6);
983 if (injail) {
984 if (prison_check_ip6(inp->inp_cred,
985 laddr) != 0)
986 continue;
987 } else {
988 if (local_exact != NULL)
989 continue;
990 }
991
992 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
993 if (injail)
994 goto found;
995 else
996 local_exact = inp;
997 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
998 if (injail)
999 jail_wild = inp;
1000 else
1001 local_wild = inp;
1002 }
1003 } /* LIST_FOREACH */
1004
1005 inp = jail_wild;
1006 if (inp == NULL)
1007 inp = jail_wild;
1008 if (inp == NULL)
1009 inp = local_exact;
1010 if (inp == NULL)
1011 inp = local_wild;
1012 if (inp != NULL)
1013 goto found;
1014 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1015 INP_GROUP_UNLOCK(pcbgroup);
1016 return (NULL);
1017
1018 found:
1019 in_pcbref(inp);
1020 INP_GROUP_UNLOCK(pcbgroup);
1021 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1022 INP_WLOCK(inp);
1023 if (in_pcbrele_wlocked(inp))
1024 return (NULL);
1025 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1026 INP_RLOCK(inp);
1027 if (in_pcbrele_rlocked(inp))
1028 return (NULL);
1029 } else
1030 panic("%s: locking buf", __func__);
1031 return (inp);
1032 }
1033 #endif /* PCBGROUP */
1034
1035 /*
1036 * Lookup PCB in hash list.
1037 */
1038 static struct inpcb *
in6_pcblookup_hash_locked(struct inpcbinfo * pcbinfo,struct in6_addr * faddr,u_int fport_arg,struct in6_addr * laddr,u_int lport_arg,int lookupflags,struct ifnet * ifp)1039 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1040 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
1041 int lookupflags, struct ifnet *ifp)
1042 {
1043 struct inpcbhead *head;
1044 struct inpcb *inp, *tmpinp;
1045 u_short fport = fport_arg, lport = lport_arg;
1046
1047 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
1048 ("%s: invalid lookup flags %d", __func__, lookupflags));
1049
1050 INP_HASH_LOCK_ASSERT(pcbinfo);
1051
1052 /*
1053 * First look for an exact match.
1054 */
1055 tmpinp = NULL;
1056 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(
1057 INP6_PCBHASHKEY(faddr), lport, fport, pcbinfo->ipi_hashmask)];
1058 LIST_FOREACH(inp, head, inp_hash) {
1059 /* XXX inp locking */
1060 if ((inp->inp_vflag & INP_IPV6) == 0)
1061 continue;
1062 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1063 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1064 inp->inp_fport == fport &&
1065 inp->inp_lport == lport) {
1066 /*
1067 * XXX We should be able to directly return
1068 * the inp here, without any checks.
1069 * Well unless both bound with SO_REUSEPORT?
1070 */
1071 if (prison_flag(inp->inp_cred, PR_IP6))
1072 return (inp);
1073 if (tmpinp == NULL)
1074 tmpinp = inp;
1075 }
1076 }
1077 if (tmpinp != NULL)
1078 return (tmpinp);
1079
1080 /*
1081 * Then look for a wildcard match, if requested.
1082 */
1083 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1084 struct inpcb *local_wild = NULL, *local_exact = NULL;
1085 struct inpcb *jail_wild = NULL;
1086 int injail;
1087
1088 /*
1089 * Order of socket selection - we always prefer jails.
1090 * 1. jailed, non-wild.
1091 * 2. jailed, wild.
1092 * 3. non-jailed, non-wild.
1093 * 4. non-jailed, wild.
1094 */
1095 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(
1096 INP6_PCBHASHKEY(&in6addr_any), lport, 0,
1097 pcbinfo->ipi_hashmask)];
1098 LIST_FOREACH(inp, head, inp_hash) {
1099 /* XXX inp locking */
1100 if ((inp->inp_vflag & INP_IPV6) == 0)
1101 continue;
1102
1103 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
1104 inp->inp_lport != lport) {
1105 continue;
1106 }
1107
1108 injail = prison_flag(inp->inp_cred, PR_IP6);
1109 if (injail) {
1110 if (prison_check_ip6(inp->inp_cred,
1111 laddr) != 0)
1112 continue;
1113 } else {
1114 if (local_exact != NULL)
1115 continue;
1116 }
1117
1118 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
1119 if (injail)
1120 return (inp);
1121 else
1122 local_exact = inp;
1123 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1124 if (injail)
1125 jail_wild = inp;
1126 else
1127 local_wild = inp;
1128 }
1129 } /* LIST_FOREACH */
1130
1131 if (jail_wild != NULL)
1132 return (jail_wild);
1133 if (local_exact != NULL)
1134 return (local_exact);
1135 if (local_wild != NULL)
1136 return (local_wild);
1137 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1138
1139 /*
1140 * Not found.
1141 */
1142 return (NULL);
1143 }
1144
1145 /*
1146 * Lookup PCB in hash list, using pcbinfo tables. This variation locks the
1147 * hash list lock, and will return the inpcb locked (i.e., requires
1148 * INPLOOKUP_LOCKPCB).
1149 */
1150 static struct inpcb *
in6_pcblookup_hash(struct inpcbinfo * pcbinfo,struct in6_addr * faddr,u_int fport,struct in6_addr * laddr,u_int lport,int lookupflags,struct ifnet * ifp)1151 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1152 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1153 struct ifnet *ifp)
1154 {
1155 struct inpcb *inp;
1156
1157 INP_HASH_RLOCK(pcbinfo);
1158 inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport,
1159 (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp);
1160 if (inp != NULL) {
1161 in_pcbref(inp);
1162 INP_HASH_RUNLOCK(pcbinfo);
1163 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1164 INP_WLOCK(inp);
1165 if (in_pcbrele_wlocked(inp))
1166 return (NULL);
1167 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1168 INP_RLOCK(inp);
1169 if (in_pcbrele_rlocked(inp))
1170 return (NULL);
1171 } else
1172 panic("%s: locking bug", __func__);
1173 } else
1174 INP_HASH_RUNLOCK(pcbinfo);
1175 return (inp);
1176 }
1177
1178 /*
1179 * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf
1180 * from which a pre-calculated hash value may be extracted.
1181 *
1182 * Possibly more of this logic should be in in6_pcbgroup.c.
1183 */
1184 struct inpcb *
in6_pcblookup(struct inpcbinfo * pcbinfo,struct in6_addr * faddr,u_int fport,struct in6_addr * laddr,u_int lport,int lookupflags,struct ifnet * ifp)1185 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport,
1186 struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp)
1187 {
1188 #if defined(PCBGROUP) && !defined(RSS)
1189 struct inpcbgroup *pcbgroup;
1190 #endif
1191
1192 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1193 ("%s: invalid lookup flags %d", __func__, lookupflags));
1194 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1195 ("%s: LOCKPCB not set", __func__));
1196
1197 /*
1198 * When not using RSS, use connection groups in preference to the
1199 * reservation table when looking up 4-tuples. When using RSS, just
1200 * use the reservation table, due to the cost of the Toeplitz hash
1201 * in software.
1202 *
1203 * XXXRW: This policy belongs in the pcbgroup code, as in principle
1204 * we could be doing RSS with a non-Toeplitz hash that is affordable
1205 * in software.
1206 */
1207 #if defined(PCBGROUP) && !defined(RSS)
1208 if (in_pcbgroup_enabled(pcbinfo)) {
1209 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1210 fport);
1211 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1212 laddr, lport, lookupflags, ifp));
1213 }
1214 #endif
1215 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1216 lookupflags, ifp));
1217 }
1218
1219 struct inpcb *
in6_pcblookup_mbuf(struct inpcbinfo * pcbinfo,struct in6_addr * faddr,u_int fport,struct in6_addr * laddr,u_int lport,int lookupflags,struct ifnet * ifp,struct mbuf * m)1220 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1221 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1222 struct ifnet *ifp, struct mbuf *m)
1223 {
1224 #ifdef PCBGROUP
1225 struct inpcbgroup *pcbgroup;
1226 #endif
1227
1228 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1229 ("%s: invalid lookup flags %d", __func__, lookupflags));
1230 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1231 ("%s: LOCKPCB not set", __func__));
1232
1233 #ifdef PCBGROUP
1234 /*
1235 * If we can use a hardware-generated hash to look up the connection
1236 * group, use that connection group to find the inpcb. Otherwise
1237 * fall back on a software hash -- or the reservation table if we're
1238 * using RSS.
1239 *
1240 * XXXRW: As above, that policy belongs in the pcbgroup code.
1241 */
1242 if (in_pcbgroup_enabled(pcbinfo) &&
1243 M_HASHTYPE_TEST(m, M_HASHTYPE_NONE) == 0) {
1244 pcbgroup = in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m),
1245 m->m_pkthdr.flowid);
1246 if (pcbgroup != NULL)
1247 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr,
1248 fport, laddr, lport, lookupflags, ifp));
1249 #ifndef RSS
1250 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1251 fport);
1252 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1253 laddr, lport, lookupflags, ifp));
1254 #endif
1255 }
1256 #endif
1257 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1258 lookupflags, ifp));
1259 }
1260
1261 void
init_sin6(struct sockaddr_in6 * sin6,struct mbuf * m)1262 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1263 {
1264 struct ip6_hdr *ip;
1265
1266 ip = mtod(m, struct ip6_hdr *);
1267 bzero(sin6, sizeof(*sin6));
1268 sin6->sin6_len = sizeof(*sin6);
1269 sin6->sin6_family = AF_INET6;
1270 sin6->sin6_addr = ip->ip6_src;
1271
1272 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */
1273
1274 return;
1275 }
1276