111#endif /* IPSEC */
112
113struct in6_addr zeroin6_addr;
114
115int
116in6_pcbbind(inp, nam, p)
117 register struct inpcb *inp;
118 struct sockaddr *nam;
119 struct proc *p;
120{
121 struct socket *so = inp->inp_socket;
122 unsigned short *lastport;
123 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
124 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
125 u_short lport = 0;
126 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
127 int error;
128
129 if (!in6_ifaddr) /* XXX broken! */
130 return (EADDRNOTAVAIL);
131 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
132 return(EINVAL);
133 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
134 wild = 1;
135 if (nam) {
136 sin6 = (struct sockaddr_in6 *)nam;
137 if (nam->sa_len != sizeof(*sin6))
138 return(EINVAL);
139 /*
140 * family check.
141 */
142 if (nam->sa_family != AF_INET6)
143 return(EAFNOSUPPORT);
144
145 /*
146 * If the scope of the destination is link-local, embed the
147 * interface index in the address.
148 */
149 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
150 /* XXX boundary check is assumed to be already done. */
151 /* XXX sin6_scope_id is weaker than advanced-api. */
152 struct in6_pktinfo *pi;
153 if (inp->in6p_outputopts &&
154 (pi = inp->in6p_outputopts->ip6po_pktinfo) &&
155 pi->ipi6_ifindex) {
156 sin6->sin6_addr.s6_addr16[1]
157 = htons(pi->ipi6_ifindex);
158 } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)
159 && inp->in6p_moptions
160 && inp->in6p_moptions->im6o_multicast_ifp) {
161 sin6->sin6_addr.s6_addr16[1] =
162 htons(inp->in6p_moptions->im6o_multicast_ifp->if_index);
163 } else if (sin6->sin6_scope_id) {
164 /* boundary check */
165 if (sin6->sin6_scope_id < 0
166 || if_index < sin6->sin6_scope_id) {
167 return ENXIO; /* XXX EINVAL? */
168 }
169 sin6->sin6_addr.s6_addr16[1]
170 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/
171 /* this must be cleared for ifa_ifwithaddr() */
172 sin6->sin6_scope_id = 0;
173 }
174 }
175
176 lport = sin6->sin6_port;
177 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
178 /*
179 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
180 * allow compepte duplication of binding if
181 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
182 * and a multicast address is bound on both
183 * new and duplicated sockets.
184 */
185 if (so->so_options & SO_REUSEADDR)
186 reuseport = SO_REUSEADDR|SO_REUSEPORT;
187 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
188 struct ifaddr *ia = NULL;
189
190 sin6->sin6_port = 0; /* yech... */
191 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
192 return(EADDRNOTAVAIL);
193
194 /*
195 * XXX: bind to an anycast address might accidentally
196 * cause sending a packet with anycast source address.
197 */
198 if (ia &&
199 ((struct in6_ifaddr *)ia)->ia6_flags &
200 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
201 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
202 return(EADDRNOTAVAIL);
203 }
204 }
205 if (lport) {
206 struct inpcb *t;
207
208 /* GROSS */
209 if (ntohs(lport) < IPV6PORT_RESERVED && p &&
210 suser_xxx(0, p, PRISON_ROOT))
211 return(EACCES);
212 if (so->so_cred->cr_uid != 0 &&
213 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
214 t = in6_pcblookup_local(inp->inp_pcbinfo,
215 &sin6->sin6_addr, lport,
216 INPLOOKUP_WILDCARD);
217 if (t &&
218 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
219 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
220 (t->inp_socket->so_options &
221 SO_REUSEPORT) == 0) &&
222 (so->so_cred->cr_uid !=
223 t->inp_socket->so_cred->cr_uid))
224 return (EADDRINUSE);
225 }
226 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
227 lport, wild);
228 if (t && (reuseport & t->inp_socket->so_options) == 0)
229 return(EADDRINUSE);
230 }
231 inp->in6p_laddr = sin6->sin6_addr;
232 }
233 if (lport == 0) {
234 ushort first, last;
235 int count;
236
237 inp->inp_flags |= INP_ANONPORT;
238
239 if (inp->inp_flags & INP_HIGHPORT) {
240 first = ipport_hifirstauto; /* sysctl */
241 last = ipport_hilastauto;
242 lastport = &pcbinfo->lasthi;
243 } else if (inp->inp_flags & INP_LOWPORT) {
244 if (p && (error = suser_xxx(0, p, PRISON_ROOT)))
245 return error;
246 first = ipport_lowfirstauto; /* 1023 */
247 last = ipport_lowlastauto; /* 600 */
248 lastport = &pcbinfo->lastlow;
249 } else {
250 first = ipport_firstauto; /* sysctl */
251 last = ipport_lastauto;
252 lastport = &pcbinfo->lastport;
253 }
254 /*
255 * Simple check to ensure all ports are not used up causing
256 * a deadlock here.
257 *
258 * We split the two cases (up and down) so that the direction
259 * is not being tested on each round of the loop.
260 */
261 if (first > last) {
262 /*
263 * counting down
264 */
265 count = first - last;
266
267 do {
268 if (count-- < 0) { /* completely used? */
269 /*
270 * Undo any address bind that may have
271 * occurred above.
272 */
273 inp->in6p_laddr = in6addr_any;
274 return (EAGAIN);
275 }
276 --*lastport;
277 if (*lastport > first || *lastport < last)
278 *lastport = first;
279 lport = htons(*lastport);
280 } while (in6_pcblookup_local(pcbinfo,
281 &inp->in6p_laddr, lport, wild));
282 } else {
283 /*
284 * counting up
285 */
286 count = last - first;
287
288 do {
289 if (count-- < 0) { /* completely used? */
290 /*
291 * Undo any address bind that may have
292 * occurred above.
293 */
294 inp->in6p_laddr = in6addr_any;
295 return (EAGAIN);
296 }
297 ++*lastport;
298 if (*lastport < first || *lastport > last)
299 *lastport = first;
300 lport = htons(*lastport);
301 } while (in6_pcblookup_local(pcbinfo,
302 &inp->in6p_laddr, lport, wild));
303 }
304 }
305 inp->inp_lport = lport;
306 if (in_pcbinshash(inp) != 0) {
307 inp->in6p_laddr = in6addr_any;
308 inp->inp_lport = 0;
309 return (EAGAIN);
310 }
311 inp->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/
312 return(0);
313}
314
315/*
316 * Transform old in6_pcbconnect() into an inner subroutine for new
317 * in6_pcbconnect(): Do some validity-checking on the remote
318 * address (in mbuf 'nam') and then determine local host address
319 * (i.e., which interface) to use to access that remote host.
320 *
321 * This preserves definition of in6_pcbconnect(), while supporting a
322 * slightly different version for T/TCP. (This is more than
323 * a bit of a kludge, but cleaning up the internal interfaces would
324 * have forced minor changes in every protocol).
325 */
326
327int
328in6_pcbladdr(inp, nam, plocal_addr6)
329 register struct inpcb *inp;
330 struct sockaddr *nam;
331 struct in6_addr **plocal_addr6;
332{
333 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
334 struct in6_pktinfo *pi;
335 struct ifnet *ifp = NULL;
336 int error = 0;
337
338 if (nam->sa_len != sizeof (*sin6))
339 return (EINVAL);
340 if (sin6->sin6_family != AF_INET6)
341 return (EAFNOSUPPORT);
342 if (sin6->sin6_port == 0)
343 return (EADDRNOTAVAIL);
344
345 /*
346 * If the scope of the destination is link-local, embed the interface
347 * index in the address.
348 */
349 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
350 /* XXX boundary check is assumed to be already done. */
351 /* XXX sin6_scope_id is weaker than advanced-api. */
352 if (inp->in6p_outputopts &&
353 (pi = inp->in6p_outputopts->ip6po_pktinfo) &&
354 pi->ipi6_ifindex) {
355 sin6->sin6_addr.s6_addr16[1] = htons(pi->ipi6_ifindex);
356 ifp = ifindex2ifnet[pi->ipi6_ifindex];
357 } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
358 inp->in6p_moptions &&
359 inp->in6p_moptions->im6o_multicast_ifp) {
360 sin6->sin6_addr.s6_addr16[1] =
361 htons(inp->in6p_moptions->im6o_multicast_ifp->if_index);
362 ifp = ifindex2ifnet[inp->in6p_moptions->im6o_multicast_ifp->if_index];
363 } else if (sin6->sin6_scope_id) {
364 /* boundary check */
365 if (sin6->sin6_scope_id < 0
366 || if_index < sin6->sin6_scope_id) {
367 return ENXIO; /* XXX EINVAL? */
368 }
369 sin6->sin6_addr.s6_addr16[1]
370 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/
371 ifp = ifindex2ifnet[sin6->sin6_scope_id];
372 }
373 }
374
375 if (in6_ifaddr) {
376 /*
377 * If the destination address is UNSPECIFIED addr,
378 * use the loopback addr, e.g ::1.
379 */
380 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
381 sin6->sin6_addr = in6addr_loopback;
382 }
383 {
384 /*
385 * XXX: in6_selectsrc might replace the bound local address
386 * with the address specified by setsockopt(IPV6_PKTINFO).
387 * Is it the intended behavior?
388 */
389 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts,
390 inp->in6p_moptions,
391 &inp->in6p_route,
392 &inp->in6p_laddr, &error);
393 if (*plocal_addr6 == 0) {
394 if (error == 0)
395 error = EADDRNOTAVAIL;
396 return(error);
397 }
398 /*
399 * Don't do pcblookup call here; return interface in
400 * plocal_addr6
401 * and exit to caller, that will do the lookup.
402 */
403 }
404
405 if (inp->in6p_route.ro_rt)
406 ifp = inp->in6p_route.ro_rt->rt_ifp;
407
408 inp->in6p_ip6_hlim = (u_int8_t)in6_selecthlim(inp, ifp);
409
410 return(0);
411}
412
413/*
414 * Outer subroutine:
415 * Connect from a socket to a specified address.
416 * Both address and port must be specified in argument sin.
417 * If don't have a local address for this socket yet,
418 * then pick one.
419 */
420int
421in6_pcbconnect(inp, nam, p)
422 register struct inpcb *inp;
423 struct sockaddr *nam;
424 struct proc *p;
425{
426 struct in6_addr *addr6;
427 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
428 int error;
429
430 /*
431 * Call inner routine, to assign local interface address.
432 */
433 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
434 return(error);
435
436 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr,
437 sin6->sin6_port,
438 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
439 ? addr6 : &inp->in6p_laddr,
440 inp->inp_lport, 0, NULL) != NULL) {
441 return (EADDRINUSE);
442 }
443 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
444 if (inp->inp_lport == 0) {
445 error = in6_pcbbind(inp, (struct sockaddr *)0, p);
446 if (error)
447 return (error);
448 }
449 inp->in6p_laddr = *addr6;
450 }
451 inp->in6p_faddr = sin6->sin6_addr;
452 inp->inp_fport = sin6->sin6_port;
453 /*
454 * xxx kazu flowlabel is necessary for connect?
455 * but if this line is missing, the garbage value remains.
456 */
457 inp->in6p_flowinfo = sin6->sin6_flowinfo;
458
459 in_pcbrehash(inp);
460 return (0);
461}
462
463/*
464 * Return an IPv6 address, which is the most appropriate for given
465 * destination and user specified options.
466 * If necessary, this function lookups the routing table and return
467 * an entry to the caller for later use.
468 */
469struct in6_addr *
470in6_selectsrc(dstsock, opts, mopts, ro, laddr, errorp)
471 struct sockaddr_in6 *dstsock;
472 struct ip6_pktopts *opts;
473 struct ip6_moptions *mopts;
474 struct route_in6 *ro;
475 struct in6_addr *laddr;
476 int *errorp;
477{
478 struct in6_addr *dst;
479 struct in6_ifaddr *ia6 = 0;
480 struct in6_pktinfo *pi = NULL;
481
482 dst = &dstsock->sin6_addr;
483 *errorp = 0;
484
485 /*
486 * If the source address is explicitly specified by the caller,
487 * use it.
488 */
489 if (opts && (pi = opts->ip6po_pktinfo) &&
490 !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr))
491 return(&pi->ipi6_addr);
492
493 /*
494 * If the source address is not specified but the socket(if any)
495 * is already bound, use the bound address.
496 */
497 if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr))
498 return(laddr);
499
500 /*
501 * If the caller doesn't specify the source address but
502 * the outgoing interface, use an address associated with
503 * the interface.
504 */
505 if (pi && pi->ipi6_ifindex) {
506 /* XXX boundary check is assumed to be already done. */
507 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex],
508 dst);
509 if (ia6 == 0) {
510 *errorp = EADDRNOTAVAIL;
511 return(0);
512 }
513 return(&satosin6(&ia6->ia_addr)->sin6_addr);
514 }
515
516 /*
517 * If the destination address is a link-local unicast address or
518 * a multicast address, and if the outgoing interface is specified
519 * by the sin6_scope_id filed, use an address associated with the
520 * interface.
521 * XXX: We're now trying to define more specific semantics of
522 * sin6_scope_id field, so this part will be rewritten in
523 * the near future.
524 */
525 if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) &&
526 dstsock->sin6_scope_id) {
527 /*
528 * I'm not sure if boundary check for scope_id is done
529 * somewhere...
530 */
531 if (dstsock->sin6_scope_id < 0 ||
532 if_index < dstsock->sin6_scope_id) {
533 *errorp = ENXIO; /* XXX: better error? */
534 return(0);
535 }
536 ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id],
537 dst);
538 if (ia6 == 0) {
539 *errorp = EADDRNOTAVAIL;
540 return(0);
541 }
542 return(&satosin6(&ia6->ia_addr)->sin6_addr);
543 }
544
545 /*
546 * If the destination address is a multicast address and
547 * the outgoing interface for the address is specified
548 * by the caller, use an address associated with the interface.
549 * There is a sanity check here; if the destination has node-local
550 * scope, the outgoing interfacde should be a loopback address.
551 * Even if the outgoing interface is not specified, we also
552 * choose a loopback interface as the outgoing interface.
553 */
554 if (IN6_IS_ADDR_MULTICAST(dst)) {
555 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL;
556
557 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) {
558 ifp = &loif[0];
559 }
560
561 if (ifp) {
562 ia6 = in6_ifawithscope(ifp, dst);
563 if (ia6 == 0) {
564 *errorp = EADDRNOTAVAIL;
565 return(0);
566 }
567 return(&ia6->ia_addr.sin6_addr);
568 }
569 }
570
571 /*
572 * If the next hop address for the packet is specified
573 * by caller, use an address associated with the route
574 * to the next hop.
575 */
576 {
577 struct sockaddr_in6 *sin6_next;
578 struct rtentry *rt;
579
580 if (opts && opts->ip6po_nexthop) {
581 sin6_next = satosin6(opts->ip6po_nexthop);
582 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL);
583 if (rt) {
584 ia6 = in6_ifawithscope(rt->rt_ifp, dst);
585 if (ia6 == 0)
586 ia6 = ifatoia6(rt->rt_ifa);
587 }
588 if (ia6 == 0) {
589 *errorp = EADDRNOTAVAIL;
590 return(0);
591 }
592 return(&satosin6(&ia6->ia_addr)->sin6_addr);
593 }
594 }
595
596 /*
597 * If route is known or can be allocated now,
598 * our src addr is taken from the i/f, else punt.
599 */
600 if (ro) {
601 if (ro->ro_rt &&
602 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) {
603 RTFREE(ro->ro_rt);
604 ro->ro_rt = (struct rtentry *)0;
605 }
606 if (ro->ro_rt == (struct rtentry *)0 ||
607 ro->ro_rt->rt_ifp == (struct ifnet *)0) {
608 /* No route yet, so try to acquire one */
609 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6));
610 ro->ro_dst.sin6_family = AF_INET6;
611 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6);
612 ro->ro_dst.sin6_addr = *dst;
613 if (IN6_IS_ADDR_MULTICAST(dst)) {
614 ro->ro_rt = rtalloc1(&((struct route *)ro)
615 ->ro_dst, 0, 0UL);
616 } else {
617 rtalloc((struct route *)ro);
618 }
619 }
620
621 /*
622 * in_pcbconnect() checks out IFF_LOOPBACK to skip using
623 * the address. But we don't know why it does so.
624 * It is necessary to ensure the scope even for lo0
625 * so doesn't check out IFF_LOOPBACK.
626 */
627
628 if (ro->ro_rt) {
629 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst);
630 if (ia6 == 0) /* xxx scope error ?*/
631 ia6 = ifatoia6(ro->ro_rt->rt_ifa);
632 }
633 if (ia6 == 0) {
634 *errorp = EHOSTUNREACH; /* no route */
635 return(0);
636 }
637 return(&satosin6(&ia6->ia_addr)->sin6_addr);
638 }
639
640 *errorp = EADDRNOTAVAIL;
641 return(0);
642}
643
644/*
645 * Default hop limit selection. The precedence is as follows:
646 * 1. Hoplimit valued specified via ioctl.
647 * 2. (If the outgoing interface is detected) the current
648 * hop limit of the interface specified by router advertisement.
649 * 3. The system default hoplimit.
650*/
651int
652in6_selecthlim(in6p, ifp)
653 struct in6pcb *in6p;
654 struct ifnet *ifp;
655{
656 if (in6p && in6p->in6p_hops >= 0)
657 return(in6p->in6p_hops);
658 else if (ifp)
659 return(nd_ifinfo[ifp->if_index].chlim);
660 else
661 return(ip6_defhlim);
662}
663
664void
665in6_pcbdisconnect(inp)
666 struct inpcb *inp;
667{
668 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
669 inp->inp_fport = 0;
670 in_pcbrehash(inp);
671 if (inp->inp_socket->so_state & SS_NOFDREF)
672 in6_pcbdetach(inp);
673}
674
675void
676in6_pcbdetach(inp)
677 struct inpcb *inp;
678{
679 struct socket *so = inp->inp_socket;
680 struct inpcbinfo *ipi = inp->inp_pcbinfo;
681
682#ifdef IPSEC
683 if (sotoinpcb(so) != 0)
684 key_freeso(so);
685 ipsec6_delete_pcbpolicy(inp);
686#endif /* IPSEC */
687 inp->inp_gencnt = ++ipi->ipi_gencnt;
688 in_pcbremlists(inp);
689 sotoinpcb(so) = 0;
690 sofree(so);
691 if (inp->in6p_options)
692 m_freem(inp->in6p_options);
693 if (inp->in6p_outputopts) {
694 if (inp->in6p_outputopts->ip6po_rthdr &&
695 inp->in6p_outputopts->ip6po_route.ro_rt)
696 RTFREE(inp->in6p_outputopts->ip6po_route.ro_rt);
697 if (inp->in6p_outputopts->ip6po_m)
698 (void)m_free(inp->in6p_outputopts->ip6po_m);
699 free(inp->in6p_outputopts, M_IP6OPT);
700 }
701 if (inp->in6p_route.ro_rt)
702 rtfree(inp->in6p_route.ro_rt);
703 ip6_freemoptions(inp->in6p_moptions);
704 inp->inp_vflag = 0;
705 zfreei(ipi->ipi_zone, inp);
706}
707
708/*
709 * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was
710 * modified to match the pru_sockaddr() and pru_peeraddr() entry points
711 * in struct pr_usrreqs, so that protocols can just reference then directly
712 * without the need for a wrapper function. The socket must have a valid
713 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
714 * except through a kernel programming error, so it is acceptable to panic
715 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
716 * because there actually /is/ a programming error somewhere... XXX)
717 */
718int
719in6_setsockaddr(so, nam)
720 struct socket *so;
721 struct sockaddr **nam;
722{
723 int s;
724 register struct inpcb *inp;
725 register struct sockaddr_in6 *sin6;
726
727 /*
728 * Do the malloc first in case it blocks.
729 */
730 MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK);
731 bzero(sin6, sizeof *sin6);
732 sin6->sin6_family = AF_INET6;
733 sin6->sin6_len = sizeof(*sin6);
734
735 s = splnet();
736 inp = sotoinpcb(so);
737 if (!inp) {
738 splx(s);
739 free(sin6, M_SONAME);
740 return EINVAL;
741 }
742 sin6->sin6_port = inp->inp_lport;
743 sin6->sin6_addr = inp->in6p_laddr;
744 splx(s);
745 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
746 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
747 else
748 sin6->sin6_scope_id = 0; /*XXX*/
749 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
750 sin6->sin6_addr.s6_addr16[1] = 0;
751
752 *nam = (struct sockaddr *)sin6;
753 return 0;
754}
755
756int
757in6_setpeeraddr(so, nam)
758 struct socket *so;
759 struct sockaddr **nam;
760{
761 int s;
762 struct inpcb *inp;
763 register struct sockaddr_in6 *sin6;
764
765 /*
766 * Do the malloc first in case it blocks.
767 */
768 MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME, M_WAITOK);
769 bzero((caddr_t)sin6, sizeof (*sin6));
770 sin6->sin6_family = AF_INET6;
771 sin6->sin6_len = sizeof(struct sockaddr_in6);
772
773 s = splnet();
774 inp = sotoinpcb(so);
775 if (!inp) {
776 splx(s);
777 free(sin6, M_SONAME);
778 return EINVAL;
779 }
780 sin6->sin6_port = inp->inp_fport;
781 sin6->sin6_addr = inp->in6p_faddr;
782 splx(s);
783 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
784 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
785 else
786 sin6->sin6_scope_id = 0; /*XXX*/
787 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
788 sin6->sin6_addr.s6_addr16[1] = 0;
789
790 *nam = (struct sockaddr *)sin6;
791 return 0;
792}
793
794int
795in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
796{
797 struct inpcb *inp = sotoinpcb(so);
798 int error;
799
800 if (inp == NULL)
801 return EINVAL;
802 if (inp->inp_vflag & INP_IPV4) {
803 error = in_setsockaddr(so, nam);
804 if (error == 0)
805 in6_sin_2_v4mapsin6_in_sock(nam);
806 } else
807 error = in6_setsockaddr(so, nam);
808
809 return error;
810}
811
812int
813in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
814{
815 struct inpcb *inp = sotoinpcb(so);
816 int error;
817
818 if (inp == NULL)
819 return EINVAL;
820 if (inp->inp_vflag & INP_IPV4) {
821 error = in_setpeeraddr(so, nam);
822 if (error == 0)
823 in6_sin_2_v4mapsin6_in_sock(nam);
824 } else
825 error = in6_setpeeraddr(so, nam);
826
827 return error;
828}
829
830/*
831 * Pass some notification to all connections of a protocol
832 * associated with address dst. The local address and/or port numbers
833 * may be specified to limit the search. The "usual action" will be
834 * taken, depending on the ctlinput cmd. The caller must filter any
835 * cmds that are uninteresting (e.g., no error in the map).
836 * Call the protocol specific routine (if any) to report
837 * any errors for each matching socket.
838 *
839 * Must be called at splnet.
840 */
841void
842in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify)
843 struct inpcbhead *head;
844 struct sockaddr *dst;
845 u_int fport_arg, lport_arg;
846 struct in6_addr *laddr6;
847 int cmd;
848 void (*notify) __P((struct inpcb *, int));
849{
850 struct inpcb *inp, *oinp;
851 struct in6_addr faddr6;
852 u_short fport = fport_arg, lport = lport_arg;
853 int errno, s;
854
855 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6)
856 return;
857 faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr;
858 if (IN6_IS_ADDR_UNSPECIFIED(&faddr6))
859 return;
860
861 /*
862 * Redirects go to all references to the destination,
863 * and use in_rtchange to invalidate the route cache.
864 * Dead host indications: notify all references to the destination.
865 * Otherwise, if we have knowledge of the local port and address,
866 * deliver only to that socket.
867 */
868 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
869 fport = 0;
870 lport = 0;
871 bzero((caddr_t)laddr6, sizeof(*laddr6));
872 if (cmd != PRC_HOSTDEAD)
873 notify = in6_rtchange;
874 }
875 errno = inet6ctlerrmap[cmd];
876 s = splnet();
877 for (inp = LIST_FIRST(head); inp != NULL;) {
878 if ((inp->inp_vflag & INP_IPV6) == 0) {
879 inp = LIST_NEXT(inp, inp_list);
880 continue;
881 }
882 if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &faddr6) ||
883 inp->inp_socket == 0 ||
884 (lport && inp->inp_lport != lport) ||
885 (!IN6_IS_ADDR_UNSPECIFIED(laddr6) &&
886 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr6)) ||
887 (fport && inp->inp_fport != fport)) {
888 inp = LIST_NEXT(inp, inp_list);
889 continue;
890 }
891 oinp = inp;
892 inp = LIST_NEXT(inp, inp_list);
893 if (notify)
894 (*notify)(oinp, errno);
895 }
896 splx(s);
897}
898
899/*
900 * Lookup a PCB based on the local address and port.
901 */
902struct inpcb *
903in6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay)
904 struct inpcbinfo *pcbinfo;
905 struct in6_addr *laddr;
906 u_int lport_arg;
907 int wild_okay;
908{
909 register struct inpcb *inp;
910 int matchwild = 3, wildcard;
911 u_short lport = lport_arg;
912
913 if (!wild_okay) {
914 struct inpcbhead *head;
915 /*
916 * Look for an unconnected (wildcard foreign addr) PCB that
917 * matches the local address and port we're looking for.
918 */
919 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
920 pcbinfo->hashmask)];
921 LIST_FOREACH(inp, head, inp_hash) {
922 if ((inp->inp_vflag & INP_IPV6) == 0)
923 continue;
924 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
925 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
926 inp->inp_lport == lport) {
927 /*
928 * Found.
929 */
930 return (inp);
931 }
932 }
933 /*
934 * Not found.
935 */
936 return (NULL);
937 } else {
938 struct inpcbporthead *porthash;
939 struct inpcbport *phd;
940 struct inpcb *match = NULL;
941 /*
942 * Best fit PCB lookup.
943 *
944 * First see if this local port is in use by looking on the
945 * port hash list.
946 */
947 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
948 pcbinfo->porthashmask)];
949 LIST_FOREACH(phd, porthash, phd_hash) {
950 if (phd->phd_port == lport)
951 break;
952 }
953 if (phd != NULL) {
954 /*
955 * Port is in use by one or more PCBs. Look for best
956 * fit.
957 */
958 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
959 wildcard = 0;
960 if ((inp->inp_vflag & INP_IPV6) == 0)
961 continue;
962 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
963 wildcard++;
964 if (!IN6_IS_ADDR_UNSPECIFIED(
965 &inp->in6p_laddr)) {
966 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
967 wildcard++;
968 else if (!IN6_ARE_ADDR_EQUAL(
969 &inp->in6p_laddr, laddr))
970 continue;
971 } else {
972 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
973 wildcard++;
974 }
975 if (wildcard < matchwild) {
976 match = inp;
977 matchwild = wildcard;
978 if (matchwild == 0) {
979 break;
980 }
981 }
982 }
983 }
984 return (match);
985 }
986}
987
988/*
989 * Check for alternatives when higher level complains
990 * about service problems. For now, invalidate cached
991 * routing information. If the route was created dynamically
992 * (by a redirect), time to try a default gateway again.
993 */
994void
995in6_losing(in6p)
996 struct inpcb *in6p;
997{
998 struct rtentry *rt;
999 struct rt_addrinfo info;
1000
1001 if ((rt = in6p->in6p_route.ro_rt) != NULL) {
1002 in6p->in6p_route.ro_rt = 0;
1003 bzero((caddr_t)&info, sizeof(info));
1004 info.rti_info[RTAX_DST] =
1005 (struct sockaddr *)&in6p->in6p_route.ro_dst;
1006 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1007 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
1008 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
1009 if (rt->rt_flags & RTF_DYNAMIC)
1010 (void)rtrequest(RTM_DELETE, rt_key(rt),
1011 rt->rt_gateway, rt_mask(rt), rt->rt_flags,
1012 (struct rtentry **)0);
1013 else
1014 /*
1015 * A new route can be allocated
1016 * the next time output is attempted.
1017 */
1018 rtfree(rt);
1019 }
1020}
1021
1022/*
1023 * After a routing change, flush old routing
1024 * and allocate a (hopefully) better one.
1025 */
1026void
1027in6_rtchange(inp, errno)
1028 struct inpcb *inp;
1029 int errno;
1030{
1031 if (inp->in6p_route.ro_rt) {
1032 rtfree(inp->in6p_route.ro_rt);
1033 inp->in6p_route.ro_rt = 0;
1034 /*
1035 * A new route can be allocated the next time
1036 * output is attempted.
1037 */
1038 }
1039}
1040
1041/*
1042 * Lookup PCB in hash list.
1043 */
1044struct inpcb *
1045in6_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp)
1046 struct inpcbinfo *pcbinfo;
1047 struct in6_addr *faddr, *laddr;
1048 u_int fport_arg, lport_arg;
1049 int wildcard;
1050 struct ifnet *ifp;
1051{
1052 struct inpcbhead *head;
1053 register struct inpcb *inp;
1054 u_short fport = fport_arg, lport = lport_arg;
1055
1056 /*
1057 * First look for an exact match.
1058 */
1059 head = &pcbinfo->hashbase[INP_PCBHASH(faddr->s6_addr32[3] /* XXX */,
1060 lport, fport,
1061 pcbinfo->hashmask)];
1062 LIST_FOREACH(inp, head, inp_hash) {
1063 if ((inp->inp_vflag & INP_IPV6) == 0)
1064 continue;
1065 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1066 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1067 inp->inp_fport == fport &&
1068 inp->inp_lport == lport) {
1069 /*
1070 * Found.
1071 */
1072 return (inp);
1073 }
1074 }
1075 if (wildcard) {
1076 struct inpcb *local_wild = NULL;
1077
1078 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
1079 pcbinfo->hashmask)];
1080 LIST_FOREACH(inp, head, inp_hash) {
1081 if ((inp->inp_vflag & INP_IPV6) == 0)
1082 continue;
1083 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
1084 inp->inp_lport == lport) {
1085#if defined(NFAITH) && NFAITH > 0
1086 if (ifp && ifp->if_type == IFT_FAITH &&
1087 (inp->inp_flags & INP_FAITH) == 0)
1088 continue;
1089#endif
1090 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
1091 laddr))
1092 return (inp);
1093 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
1094 local_wild = inp;
1095 }
1096 }
1097 return (local_wild);
1098 }
1099
1100 /*
1101 * Not found.
1102 */
1103 return (NULL);
1104}
1105
1106void
1107init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1108{
1109 struct ip6_hdr *ip;
1110
1111 ip = mtod(m, struct ip6_hdr *);
1112 bzero(sin6, sizeof(*sin6));
1113 sin6->sin6_len = sizeof(*sin6);
1114 sin6->sin6_family = AF_INET6;
1115 sin6->sin6_addr = ip->ip6_src;
1116 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1117 sin6->sin6_addr.s6_addr16[1] = 0;
1118 sin6->sin6_scope_id =
1119 (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1120 ? m->m_pkthdr.rcvif->if_index : 0;
1121
1122 return;
1123}
| 111#endif /* IPSEC */
112
113struct in6_addr zeroin6_addr;
114
115int
116in6_pcbbind(inp, nam, p)
117 register struct inpcb *inp;
118 struct sockaddr *nam;
119 struct proc *p;
120{
121 struct socket *so = inp->inp_socket;
122 unsigned short *lastport;
123 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
124 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
125 u_short lport = 0;
126 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
127 int error;
128
129 if (!in6_ifaddr) /* XXX broken! */
130 return (EADDRNOTAVAIL);
131 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
132 return(EINVAL);
133 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
134 wild = 1;
135 if (nam) {
136 sin6 = (struct sockaddr_in6 *)nam;
137 if (nam->sa_len != sizeof(*sin6))
138 return(EINVAL);
139 /*
140 * family check.
141 */
142 if (nam->sa_family != AF_INET6)
143 return(EAFNOSUPPORT);
144
145 /*
146 * If the scope of the destination is link-local, embed the
147 * interface index in the address.
148 */
149 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
150 /* XXX boundary check is assumed to be already done. */
151 /* XXX sin6_scope_id is weaker than advanced-api. */
152 struct in6_pktinfo *pi;
153 if (inp->in6p_outputopts &&
154 (pi = inp->in6p_outputopts->ip6po_pktinfo) &&
155 pi->ipi6_ifindex) {
156 sin6->sin6_addr.s6_addr16[1]
157 = htons(pi->ipi6_ifindex);
158 } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)
159 && inp->in6p_moptions
160 && inp->in6p_moptions->im6o_multicast_ifp) {
161 sin6->sin6_addr.s6_addr16[1] =
162 htons(inp->in6p_moptions->im6o_multicast_ifp->if_index);
163 } else if (sin6->sin6_scope_id) {
164 /* boundary check */
165 if (sin6->sin6_scope_id < 0
166 || if_index < sin6->sin6_scope_id) {
167 return ENXIO; /* XXX EINVAL? */
168 }
169 sin6->sin6_addr.s6_addr16[1]
170 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/
171 /* this must be cleared for ifa_ifwithaddr() */
172 sin6->sin6_scope_id = 0;
173 }
174 }
175
176 lport = sin6->sin6_port;
177 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
178 /*
179 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
180 * allow compepte duplication of binding if
181 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
182 * and a multicast address is bound on both
183 * new and duplicated sockets.
184 */
185 if (so->so_options & SO_REUSEADDR)
186 reuseport = SO_REUSEADDR|SO_REUSEPORT;
187 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
188 struct ifaddr *ia = NULL;
189
190 sin6->sin6_port = 0; /* yech... */
191 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
192 return(EADDRNOTAVAIL);
193
194 /*
195 * XXX: bind to an anycast address might accidentally
196 * cause sending a packet with anycast source address.
197 */
198 if (ia &&
199 ((struct in6_ifaddr *)ia)->ia6_flags &
200 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
201 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
202 return(EADDRNOTAVAIL);
203 }
204 }
205 if (lport) {
206 struct inpcb *t;
207
208 /* GROSS */
209 if (ntohs(lport) < IPV6PORT_RESERVED && p &&
210 suser_xxx(0, p, PRISON_ROOT))
211 return(EACCES);
212 if (so->so_cred->cr_uid != 0 &&
213 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
214 t = in6_pcblookup_local(inp->inp_pcbinfo,
215 &sin6->sin6_addr, lport,
216 INPLOOKUP_WILDCARD);
217 if (t &&
218 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
219 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
220 (t->inp_socket->so_options &
221 SO_REUSEPORT) == 0) &&
222 (so->so_cred->cr_uid !=
223 t->inp_socket->so_cred->cr_uid))
224 return (EADDRINUSE);
225 }
226 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
227 lport, wild);
228 if (t && (reuseport & t->inp_socket->so_options) == 0)
229 return(EADDRINUSE);
230 }
231 inp->in6p_laddr = sin6->sin6_addr;
232 }
233 if (lport == 0) {
234 ushort first, last;
235 int count;
236
237 inp->inp_flags |= INP_ANONPORT;
238
239 if (inp->inp_flags & INP_HIGHPORT) {
240 first = ipport_hifirstauto; /* sysctl */
241 last = ipport_hilastauto;
242 lastport = &pcbinfo->lasthi;
243 } else if (inp->inp_flags & INP_LOWPORT) {
244 if (p && (error = suser_xxx(0, p, PRISON_ROOT)))
245 return error;
246 first = ipport_lowfirstauto; /* 1023 */
247 last = ipport_lowlastauto; /* 600 */
248 lastport = &pcbinfo->lastlow;
249 } else {
250 first = ipport_firstauto; /* sysctl */
251 last = ipport_lastauto;
252 lastport = &pcbinfo->lastport;
253 }
254 /*
255 * Simple check to ensure all ports are not used up causing
256 * a deadlock here.
257 *
258 * We split the two cases (up and down) so that the direction
259 * is not being tested on each round of the loop.
260 */
261 if (first > last) {
262 /*
263 * counting down
264 */
265 count = first - last;
266
267 do {
268 if (count-- < 0) { /* completely used? */
269 /*
270 * Undo any address bind that may have
271 * occurred above.
272 */
273 inp->in6p_laddr = in6addr_any;
274 return (EAGAIN);
275 }
276 --*lastport;
277 if (*lastport > first || *lastport < last)
278 *lastport = first;
279 lport = htons(*lastport);
280 } while (in6_pcblookup_local(pcbinfo,
281 &inp->in6p_laddr, lport, wild));
282 } else {
283 /*
284 * counting up
285 */
286 count = last - first;
287
288 do {
289 if (count-- < 0) { /* completely used? */
290 /*
291 * Undo any address bind that may have
292 * occurred above.
293 */
294 inp->in6p_laddr = in6addr_any;
295 return (EAGAIN);
296 }
297 ++*lastport;
298 if (*lastport < first || *lastport > last)
299 *lastport = first;
300 lport = htons(*lastport);
301 } while (in6_pcblookup_local(pcbinfo,
302 &inp->in6p_laddr, lport, wild));
303 }
304 }
305 inp->inp_lport = lport;
306 if (in_pcbinshash(inp) != 0) {
307 inp->in6p_laddr = in6addr_any;
308 inp->inp_lport = 0;
309 return (EAGAIN);
310 }
311 inp->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/
312 return(0);
313}
314
315/*
316 * Transform old in6_pcbconnect() into an inner subroutine for new
317 * in6_pcbconnect(): Do some validity-checking on the remote
318 * address (in mbuf 'nam') and then determine local host address
319 * (i.e., which interface) to use to access that remote host.
320 *
321 * This preserves definition of in6_pcbconnect(), while supporting a
322 * slightly different version for T/TCP. (This is more than
323 * a bit of a kludge, but cleaning up the internal interfaces would
324 * have forced minor changes in every protocol).
325 */
326
327int
328in6_pcbladdr(inp, nam, plocal_addr6)
329 register struct inpcb *inp;
330 struct sockaddr *nam;
331 struct in6_addr **plocal_addr6;
332{
333 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
334 struct in6_pktinfo *pi;
335 struct ifnet *ifp = NULL;
336 int error = 0;
337
338 if (nam->sa_len != sizeof (*sin6))
339 return (EINVAL);
340 if (sin6->sin6_family != AF_INET6)
341 return (EAFNOSUPPORT);
342 if (sin6->sin6_port == 0)
343 return (EADDRNOTAVAIL);
344
345 /*
346 * If the scope of the destination is link-local, embed the interface
347 * index in the address.
348 */
349 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
350 /* XXX boundary check is assumed to be already done. */
351 /* XXX sin6_scope_id is weaker than advanced-api. */
352 if (inp->in6p_outputopts &&
353 (pi = inp->in6p_outputopts->ip6po_pktinfo) &&
354 pi->ipi6_ifindex) {
355 sin6->sin6_addr.s6_addr16[1] = htons(pi->ipi6_ifindex);
356 ifp = ifindex2ifnet[pi->ipi6_ifindex];
357 } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
358 inp->in6p_moptions &&
359 inp->in6p_moptions->im6o_multicast_ifp) {
360 sin6->sin6_addr.s6_addr16[1] =
361 htons(inp->in6p_moptions->im6o_multicast_ifp->if_index);
362 ifp = ifindex2ifnet[inp->in6p_moptions->im6o_multicast_ifp->if_index];
363 } else if (sin6->sin6_scope_id) {
364 /* boundary check */
365 if (sin6->sin6_scope_id < 0
366 || if_index < sin6->sin6_scope_id) {
367 return ENXIO; /* XXX EINVAL? */
368 }
369 sin6->sin6_addr.s6_addr16[1]
370 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/
371 ifp = ifindex2ifnet[sin6->sin6_scope_id];
372 }
373 }
374
375 if (in6_ifaddr) {
376 /*
377 * If the destination address is UNSPECIFIED addr,
378 * use the loopback addr, e.g ::1.
379 */
380 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
381 sin6->sin6_addr = in6addr_loopback;
382 }
383 {
384 /*
385 * XXX: in6_selectsrc might replace the bound local address
386 * with the address specified by setsockopt(IPV6_PKTINFO).
387 * Is it the intended behavior?
388 */
389 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts,
390 inp->in6p_moptions,
391 &inp->in6p_route,
392 &inp->in6p_laddr, &error);
393 if (*plocal_addr6 == 0) {
394 if (error == 0)
395 error = EADDRNOTAVAIL;
396 return(error);
397 }
398 /*
399 * Don't do pcblookup call here; return interface in
400 * plocal_addr6
401 * and exit to caller, that will do the lookup.
402 */
403 }
404
405 if (inp->in6p_route.ro_rt)
406 ifp = inp->in6p_route.ro_rt->rt_ifp;
407
408 inp->in6p_ip6_hlim = (u_int8_t)in6_selecthlim(inp, ifp);
409
410 return(0);
411}
412
413/*
414 * Outer subroutine:
415 * Connect from a socket to a specified address.
416 * Both address and port must be specified in argument sin.
417 * If don't have a local address for this socket yet,
418 * then pick one.
419 */
420int
421in6_pcbconnect(inp, nam, p)
422 register struct inpcb *inp;
423 struct sockaddr *nam;
424 struct proc *p;
425{
426 struct in6_addr *addr6;
427 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
428 int error;
429
430 /*
431 * Call inner routine, to assign local interface address.
432 */
433 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
434 return(error);
435
436 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr,
437 sin6->sin6_port,
438 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
439 ? addr6 : &inp->in6p_laddr,
440 inp->inp_lport, 0, NULL) != NULL) {
441 return (EADDRINUSE);
442 }
443 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
444 if (inp->inp_lport == 0) {
445 error = in6_pcbbind(inp, (struct sockaddr *)0, p);
446 if (error)
447 return (error);
448 }
449 inp->in6p_laddr = *addr6;
450 }
451 inp->in6p_faddr = sin6->sin6_addr;
452 inp->inp_fport = sin6->sin6_port;
453 /*
454 * xxx kazu flowlabel is necessary for connect?
455 * but if this line is missing, the garbage value remains.
456 */
457 inp->in6p_flowinfo = sin6->sin6_flowinfo;
458
459 in_pcbrehash(inp);
460 return (0);
461}
462
463/*
464 * Return an IPv6 address, which is the most appropriate for given
465 * destination and user specified options.
466 * If necessary, this function lookups the routing table and return
467 * an entry to the caller for later use.
468 */
469struct in6_addr *
470in6_selectsrc(dstsock, opts, mopts, ro, laddr, errorp)
471 struct sockaddr_in6 *dstsock;
472 struct ip6_pktopts *opts;
473 struct ip6_moptions *mopts;
474 struct route_in6 *ro;
475 struct in6_addr *laddr;
476 int *errorp;
477{
478 struct in6_addr *dst;
479 struct in6_ifaddr *ia6 = 0;
480 struct in6_pktinfo *pi = NULL;
481
482 dst = &dstsock->sin6_addr;
483 *errorp = 0;
484
485 /*
486 * If the source address is explicitly specified by the caller,
487 * use it.
488 */
489 if (opts && (pi = opts->ip6po_pktinfo) &&
490 !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr))
491 return(&pi->ipi6_addr);
492
493 /*
494 * If the source address is not specified but the socket(if any)
495 * is already bound, use the bound address.
496 */
497 if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr))
498 return(laddr);
499
500 /*
501 * If the caller doesn't specify the source address but
502 * the outgoing interface, use an address associated with
503 * the interface.
504 */
505 if (pi && pi->ipi6_ifindex) {
506 /* XXX boundary check is assumed to be already done. */
507 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex],
508 dst);
509 if (ia6 == 0) {
510 *errorp = EADDRNOTAVAIL;
511 return(0);
512 }
513 return(&satosin6(&ia6->ia_addr)->sin6_addr);
514 }
515
516 /*
517 * If the destination address is a link-local unicast address or
518 * a multicast address, and if the outgoing interface is specified
519 * by the sin6_scope_id filed, use an address associated with the
520 * interface.
521 * XXX: We're now trying to define more specific semantics of
522 * sin6_scope_id field, so this part will be rewritten in
523 * the near future.
524 */
525 if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) &&
526 dstsock->sin6_scope_id) {
527 /*
528 * I'm not sure if boundary check for scope_id is done
529 * somewhere...
530 */
531 if (dstsock->sin6_scope_id < 0 ||
532 if_index < dstsock->sin6_scope_id) {
533 *errorp = ENXIO; /* XXX: better error? */
534 return(0);
535 }
536 ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id],
537 dst);
538 if (ia6 == 0) {
539 *errorp = EADDRNOTAVAIL;
540 return(0);
541 }
542 return(&satosin6(&ia6->ia_addr)->sin6_addr);
543 }
544
545 /*
546 * If the destination address is a multicast address and
547 * the outgoing interface for the address is specified
548 * by the caller, use an address associated with the interface.
549 * There is a sanity check here; if the destination has node-local
550 * scope, the outgoing interfacde should be a loopback address.
551 * Even if the outgoing interface is not specified, we also
552 * choose a loopback interface as the outgoing interface.
553 */
554 if (IN6_IS_ADDR_MULTICAST(dst)) {
555 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL;
556
557 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) {
558 ifp = &loif[0];
559 }
560
561 if (ifp) {
562 ia6 = in6_ifawithscope(ifp, dst);
563 if (ia6 == 0) {
564 *errorp = EADDRNOTAVAIL;
565 return(0);
566 }
567 return(&ia6->ia_addr.sin6_addr);
568 }
569 }
570
571 /*
572 * If the next hop address for the packet is specified
573 * by caller, use an address associated with the route
574 * to the next hop.
575 */
576 {
577 struct sockaddr_in6 *sin6_next;
578 struct rtentry *rt;
579
580 if (opts && opts->ip6po_nexthop) {
581 sin6_next = satosin6(opts->ip6po_nexthop);
582 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL);
583 if (rt) {
584 ia6 = in6_ifawithscope(rt->rt_ifp, dst);
585 if (ia6 == 0)
586 ia6 = ifatoia6(rt->rt_ifa);
587 }
588 if (ia6 == 0) {
589 *errorp = EADDRNOTAVAIL;
590 return(0);
591 }
592 return(&satosin6(&ia6->ia_addr)->sin6_addr);
593 }
594 }
595
596 /*
597 * If route is known or can be allocated now,
598 * our src addr is taken from the i/f, else punt.
599 */
600 if (ro) {
601 if (ro->ro_rt &&
602 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) {
603 RTFREE(ro->ro_rt);
604 ro->ro_rt = (struct rtentry *)0;
605 }
606 if (ro->ro_rt == (struct rtentry *)0 ||
607 ro->ro_rt->rt_ifp == (struct ifnet *)0) {
608 /* No route yet, so try to acquire one */
609 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6));
610 ro->ro_dst.sin6_family = AF_INET6;
611 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6);
612 ro->ro_dst.sin6_addr = *dst;
613 if (IN6_IS_ADDR_MULTICAST(dst)) {
614 ro->ro_rt = rtalloc1(&((struct route *)ro)
615 ->ro_dst, 0, 0UL);
616 } else {
617 rtalloc((struct route *)ro);
618 }
619 }
620
621 /*
622 * in_pcbconnect() checks out IFF_LOOPBACK to skip using
623 * the address. But we don't know why it does so.
624 * It is necessary to ensure the scope even for lo0
625 * so doesn't check out IFF_LOOPBACK.
626 */
627
628 if (ro->ro_rt) {
629 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst);
630 if (ia6 == 0) /* xxx scope error ?*/
631 ia6 = ifatoia6(ro->ro_rt->rt_ifa);
632 }
633 if (ia6 == 0) {
634 *errorp = EHOSTUNREACH; /* no route */
635 return(0);
636 }
637 return(&satosin6(&ia6->ia_addr)->sin6_addr);
638 }
639
640 *errorp = EADDRNOTAVAIL;
641 return(0);
642}
643
644/*
645 * Default hop limit selection. The precedence is as follows:
646 * 1. Hoplimit valued specified via ioctl.
647 * 2. (If the outgoing interface is detected) the current
648 * hop limit of the interface specified by router advertisement.
649 * 3. The system default hoplimit.
650*/
651int
652in6_selecthlim(in6p, ifp)
653 struct in6pcb *in6p;
654 struct ifnet *ifp;
655{
656 if (in6p && in6p->in6p_hops >= 0)
657 return(in6p->in6p_hops);
658 else if (ifp)
659 return(nd_ifinfo[ifp->if_index].chlim);
660 else
661 return(ip6_defhlim);
662}
663
664void
665in6_pcbdisconnect(inp)
666 struct inpcb *inp;
667{
668 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
669 inp->inp_fport = 0;
670 in_pcbrehash(inp);
671 if (inp->inp_socket->so_state & SS_NOFDREF)
672 in6_pcbdetach(inp);
673}
674
675void
676in6_pcbdetach(inp)
677 struct inpcb *inp;
678{
679 struct socket *so = inp->inp_socket;
680 struct inpcbinfo *ipi = inp->inp_pcbinfo;
681
682#ifdef IPSEC
683 if (sotoinpcb(so) != 0)
684 key_freeso(so);
685 ipsec6_delete_pcbpolicy(inp);
686#endif /* IPSEC */
687 inp->inp_gencnt = ++ipi->ipi_gencnt;
688 in_pcbremlists(inp);
689 sotoinpcb(so) = 0;
690 sofree(so);
691 if (inp->in6p_options)
692 m_freem(inp->in6p_options);
693 if (inp->in6p_outputopts) {
694 if (inp->in6p_outputopts->ip6po_rthdr &&
695 inp->in6p_outputopts->ip6po_route.ro_rt)
696 RTFREE(inp->in6p_outputopts->ip6po_route.ro_rt);
697 if (inp->in6p_outputopts->ip6po_m)
698 (void)m_free(inp->in6p_outputopts->ip6po_m);
699 free(inp->in6p_outputopts, M_IP6OPT);
700 }
701 if (inp->in6p_route.ro_rt)
702 rtfree(inp->in6p_route.ro_rt);
703 ip6_freemoptions(inp->in6p_moptions);
704 inp->inp_vflag = 0;
705 zfreei(ipi->ipi_zone, inp);
706}
707
708/*
709 * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was
710 * modified to match the pru_sockaddr() and pru_peeraddr() entry points
711 * in struct pr_usrreqs, so that protocols can just reference then directly
712 * without the need for a wrapper function. The socket must have a valid
713 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
714 * except through a kernel programming error, so it is acceptable to panic
715 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
716 * because there actually /is/ a programming error somewhere... XXX)
717 */
718int
719in6_setsockaddr(so, nam)
720 struct socket *so;
721 struct sockaddr **nam;
722{
723 int s;
724 register struct inpcb *inp;
725 register struct sockaddr_in6 *sin6;
726
727 /*
728 * Do the malloc first in case it blocks.
729 */
730 MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK);
731 bzero(sin6, sizeof *sin6);
732 sin6->sin6_family = AF_INET6;
733 sin6->sin6_len = sizeof(*sin6);
734
735 s = splnet();
736 inp = sotoinpcb(so);
737 if (!inp) {
738 splx(s);
739 free(sin6, M_SONAME);
740 return EINVAL;
741 }
742 sin6->sin6_port = inp->inp_lport;
743 sin6->sin6_addr = inp->in6p_laddr;
744 splx(s);
745 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
746 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
747 else
748 sin6->sin6_scope_id = 0; /*XXX*/
749 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
750 sin6->sin6_addr.s6_addr16[1] = 0;
751
752 *nam = (struct sockaddr *)sin6;
753 return 0;
754}
755
756int
757in6_setpeeraddr(so, nam)
758 struct socket *so;
759 struct sockaddr **nam;
760{
761 int s;
762 struct inpcb *inp;
763 register struct sockaddr_in6 *sin6;
764
765 /*
766 * Do the malloc first in case it blocks.
767 */
768 MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME, M_WAITOK);
769 bzero((caddr_t)sin6, sizeof (*sin6));
770 sin6->sin6_family = AF_INET6;
771 sin6->sin6_len = sizeof(struct sockaddr_in6);
772
773 s = splnet();
774 inp = sotoinpcb(so);
775 if (!inp) {
776 splx(s);
777 free(sin6, M_SONAME);
778 return EINVAL;
779 }
780 sin6->sin6_port = inp->inp_fport;
781 sin6->sin6_addr = inp->in6p_faddr;
782 splx(s);
783 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
784 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
785 else
786 sin6->sin6_scope_id = 0; /*XXX*/
787 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
788 sin6->sin6_addr.s6_addr16[1] = 0;
789
790 *nam = (struct sockaddr *)sin6;
791 return 0;
792}
793
794int
795in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
796{
797 struct inpcb *inp = sotoinpcb(so);
798 int error;
799
800 if (inp == NULL)
801 return EINVAL;
802 if (inp->inp_vflag & INP_IPV4) {
803 error = in_setsockaddr(so, nam);
804 if (error == 0)
805 in6_sin_2_v4mapsin6_in_sock(nam);
806 } else
807 error = in6_setsockaddr(so, nam);
808
809 return error;
810}
811
812int
813in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
814{
815 struct inpcb *inp = sotoinpcb(so);
816 int error;
817
818 if (inp == NULL)
819 return EINVAL;
820 if (inp->inp_vflag & INP_IPV4) {
821 error = in_setpeeraddr(so, nam);
822 if (error == 0)
823 in6_sin_2_v4mapsin6_in_sock(nam);
824 } else
825 error = in6_setpeeraddr(so, nam);
826
827 return error;
828}
829
830/*
831 * Pass some notification to all connections of a protocol
832 * associated with address dst. The local address and/or port numbers
833 * may be specified to limit the search. The "usual action" will be
834 * taken, depending on the ctlinput cmd. The caller must filter any
835 * cmds that are uninteresting (e.g., no error in the map).
836 * Call the protocol specific routine (if any) to report
837 * any errors for each matching socket.
838 *
839 * Must be called at splnet.
840 */
841void
842in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify)
843 struct inpcbhead *head;
844 struct sockaddr *dst;
845 u_int fport_arg, lport_arg;
846 struct in6_addr *laddr6;
847 int cmd;
848 void (*notify) __P((struct inpcb *, int));
849{
850 struct inpcb *inp, *oinp;
851 struct in6_addr faddr6;
852 u_short fport = fport_arg, lport = lport_arg;
853 int errno, s;
854
855 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6)
856 return;
857 faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr;
858 if (IN6_IS_ADDR_UNSPECIFIED(&faddr6))
859 return;
860
861 /*
862 * Redirects go to all references to the destination,
863 * and use in_rtchange to invalidate the route cache.
864 * Dead host indications: notify all references to the destination.
865 * Otherwise, if we have knowledge of the local port and address,
866 * deliver only to that socket.
867 */
868 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
869 fport = 0;
870 lport = 0;
871 bzero((caddr_t)laddr6, sizeof(*laddr6));
872 if (cmd != PRC_HOSTDEAD)
873 notify = in6_rtchange;
874 }
875 errno = inet6ctlerrmap[cmd];
876 s = splnet();
877 for (inp = LIST_FIRST(head); inp != NULL;) {
878 if ((inp->inp_vflag & INP_IPV6) == 0) {
879 inp = LIST_NEXT(inp, inp_list);
880 continue;
881 }
882 if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &faddr6) ||
883 inp->inp_socket == 0 ||
884 (lport && inp->inp_lport != lport) ||
885 (!IN6_IS_ADDR_UNSPECIFIED(laddr6) &&
886 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr6)) ||
887 (fport && inp->inp_fport != fport)) {
888 inp = LIST_NEXT(inp, inp_list);
889 continue;
890 }
891 oinp = inp;
892 inp = LIST_NEXT(inp, inp_list);
893 if (notify)
894 (*notify)(oinp, errno);
895 }
896 splx(s);
897}
898
899/*
900 * Lookup a PCB based on the local address and port.
901 */
902struct inpcb *
903in6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay)
904 struct inpcbinfo *pcbinfo;
905 struct in6_addr *laddr;
906 u_int lport_arg;
907 int wild_okay;
908{
909 register struct inpcb *inp;
910 int matchwild = 3, wildcard;
911 u_short lport = lport_arg;
912
913 if (!wild_okay) {
914 struct inpcbhead *head;
915 /*
916 * Look for an unconnected (wildcard foreign addr) PCB that
917 * matches the local address and port we're looking for.
918 */
919 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
920 pcbinfo->hashmask)];
921 LIST_FOREACH(inp, head, inp_hash) {
922 if ((inp->inp_vflag & INP_IPV6) == 0)
923 continue;
924 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
925 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
926 inp->inp_lport == lport) {
927 /*
928 * Found.
929 */
930 return (inp);
931 }
932 }
933 /*
934 * Not found.
935 */
936 return (NULL);
937 } else {
938 struct inpcbporthead *porthash;
939 struct inpcbport *phd;
940 struct inpcb *match = NULL;
941 /*
942 * Best fit PCB lookup.
943 *
944 * First see if this local port is in use by looking on the
945 * port hash list.
946 */
947 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
948 pcbinfo->porthashmask)];
949 LIST_FOREACH(phd, porthash, phd_hash) {
950 if (phd->phd_port == lport)
951 break;
952 }
953 if (phd != NULL) {
954 /*
955 * Port is in use by one or more PCBs. Look for best
956 * fit.
957 */
958 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
959 wildcard = 0;
960 if ((inp->inp_vflag & INP_IPV6) == 0)
961 continue;
962 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
963 wildcard++;
964 if (!IN6_IS_ADDR_UNSPECIFIED(
965 &inp->in6p_laddr)) {
966 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
967 wildcard++;
968 else if (!IN6_ARE_ADDR_EQUAL(
969 &inp->in6p_laddr, laddr))
970 continue;
971 } else {
972 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
973 wildcard++;
974 }
975 if (wildcard < matchwild) {
976 match = inp;
977 matchwild = wildcard;
978 if (matchwild == 0) {
979 break;
980 }
981 }
982 }
983 }
984 return (match);
985 }
986}
987
988/*
989 * Check for alternatives when higher level complains
990 * about service problems. For now, invalidate cached
991 * routing information. If the route was created dynamically
992 * (by a redirect), time to try a default gateway again.
993 */
994void
995in6_losing(in6p)
996 struct inpcb *in6p;
997{
998 struct rtentry *rt;
999 struct rt_addrinfo info;
1000
1001 if ((rt = in6p->in6p_route.ro_rt) != NULL) {
1002 in6p->in6p_route.ro_rt = 0;
1003 bzero((caddr_t)&info, sizeof(info));
1004 info.rti_info[RTAX_DST] =
1005 (struct sockaddr *)&in6p->in6p_route.ro_dst;
1006 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1007 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
1008 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
1009 if (rt->rt_flags & RTF_DYNAMIC)
1010 (void)rtrequest(RTM_DELETE, rt_key(rt),
1011 rt->rt_gateway, rt_mask(rt), rt->rt_flags,
1012 (struct rtentry **)0);
1013 else
1014 /*
1015 * A new route can be allocated
1016 * the next time output is attempted.
1017 */
1018 rtfree(rt);
1019 }
1020}
1021
1022/*
1023 * After a routing change, flush old routing
1024 * and allocate a (hopefully) better one.
1025 */
1026void
1027in6_rtchange(inp, errno)
1028 struct inpcb *inp;
1029 int errno;
1030{
1031 if (inp->in6p_route.ro_rt) {
1032 rtfree(inp->in6p_route.ro_rt);
1033 inp->in6p_route.ro_rt = 0;
1034 /*
1035 * A new route can be allocated the next time
1036 * output is attempted.
1037 */
1038 }
1039}
1040
1041/*
1042 * Lookup PCB in hash list.
1043 */
1044struct inpcb *
1045in6_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp)
1046 struct inpcbinfo *pcbinfo;
1047 struct in6_addr *faddr, *laddr;
1048 u_int fport_arg, lport_arg;
1049 int wildcard;
1050 struct ifnet *ifp;
1051{
1052 struct inpcbhead *head;
1053 register struct inpcb *inp;
1054 u_short fport = fport_arg, lport = lport_arg;
1055
1056 /*
1057 * First look for an exact match.
1058 */
1059 head = &pcbinfo->hashbase[INP_PCBHASH(faddr->s6_addr32[3] /* XXX */,
1060 lport, fport,
1061 pcbinfo->hashmask)];
1062 LIST_FOREACH(inp, head, inp_hash) {
1063 if ((inp->inp_vflag & INP_IPV6) == 0)
1064 continue;
1065 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1066 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1067 inp->inp_fport == fport &&
1068 inp->inp_lport == lport) {
1069 /*
1070 * Found.
1071 */
1072 return (inp);
1073 }
1074 }
1075 if (wildcard) {
1076 struct inpcb *local_wild = NULL;
1077
1078 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
1079 pcbinfo->hashmask)];
1080 LIST_FOREACH(inp, head, inp_hash) {
1081 if ((inp->inp_vflag & INP_IPV6) == 0)
1082 continue;
1083 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
1084 inp->inp_lport == lport) {
1085#if defined(NFAITH) && NFAITH > 0
1086 if (ifp && ifp->if_type == IFT_FAITH &&
1087 (inp->inp_flags & INP_FAITH) == 0)
1088 continue;
1089#endif
1090 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
1091 laddr))
1092 return (inp);
1093 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
1094 local_wild = inp;
1095 }
1096 }
1097 return (local_wild);
1098 }
1099
1100 /*
1101 * Not found.
1102 */
1103 return (NULL);
1104}
1105
1106void
1107init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1108{
1109 struct ip6_hdr *ip;
1110
1111 ip = mtod(m, struct ip6_hdr *);
1112 bzero(sin6, sizeof(*sin6));
1113 sin6->sin6_len = sizeof(*sin6);
1114 sin6->sin6_family = AF_INET6;
1115 sin6->sin6_addr = ip->ip6_src;
1116 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1117 sin6->sin6_addr.s6_addr16[1] = 0;
1118 sin6->sin6_scope_id =
1119 (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1120 ? m->m_pkthdr.rcvif->if_index : 0;
1121
1122 return;
1123}
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