1 /* $FreeBSD: src/sys/netinet6/in6_pcb.c,v 1.10.2.9 2003/01/24 05:11:35 sam Exp $ */
2 /* $DragonFly: src/sys/netinet6/in6_pcb.c,v 1.11 2004/03/04 01:02:06 hsu Exp $ */
3 /* $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $ */
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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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
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57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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67 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94
71 #include "opt_inet6.h"
72 #include "opt_ipsec.h"
74 #include <sys/param.h>
75 #include <sys/systm.h>
76 #include <sys/malloc.h>
78 #include <sys/domain.h>
79 #include <sys/protosw.h>
80 #include <sys/socket.h>
81 #include <sys/socketvar.h>
82 #include <sys/sockio.h>
83 #include <sys/errno.h>
88 #include <vm/vm_zone.h>
91 #include <net/if_types.h>
92 #include <net/route.h>
94 #include <netinet/in.h>
95 #include <netinet/in_var.h>
96 #include <netinet/in_systm.h>
97 #include <netinet/ip6.h>
98 #include <netinet/ip_var.h>
99 #include <netinet6/ip6_var.h>
100 #include <netinet6/nd6.h>
101 #include <netinet/in_pcb.h>
102 #include <netinet6/in6_pcb.h>
105 #include <netinet6/ipsec.h>
107 #include <netinet6/ipsec6.h>
109 #include <netinet6/ah.h>
111 #include <netinet6/ah6.h>
113 #include <netproto/key/key.h>
119 #include <netipsec/key.h>
121 #endif /* FAST_IPSEC */
123 struct in6_addr zeroin6_addr;
126 in6_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
128 struct socket *so = inp->inp_socket;
129 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
130 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
132 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
134 if (!in6_ifaddr) /* XXX broken! */
135 return (EADDRNOTAVAIL);
136 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
138 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
141 sin6 = (struct sockaddr_in6 *)nam;
142 if (nam->sa_len != sizeof(*sin6))
147 if (nam->sa_family != AF_INET6)
148 return(EAFNOSUPPORT);
150 /* KAME hack: embed scopeid */
151 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0)
153 /* this must be cleared for ifa_ifwithaddr() */
154 sin6->sin6_scope_id = 0;
156 lport = sin6->sin6_port;
157 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
159 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
160 * allow compepte duplication of binding if
161 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
162 * and a multicast address is bound on both
163 * new and duplicated sockets.
165 if (so->so_options & SO_REUSEADDR)
166 reuseport = SO_REUSEADDR|SO_REUSEPORT;
167 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
168 struct ifaddr *ia = NULL;
170 sin6->sin6_port = 0; /* yech... */
171 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
172 return(EADDRNOTAVAIL);
175 * XXX: bind to an anycast address might accidentally
176 * cause sending a packet with anycast source address.
177 * We should allow to bind to a deprecated address, since
178 * the application dare to use it.
181 ((struct in6_ifaddr *)ia)->ia6_flags &
182 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
183 return(EADDRNOTAVAIL);
188 struct proc *p = td->td_proc; /* may be NULL */
191 if (ntohs(lport) < IPV6PORT_RESERVED && p &&
192 suser_cred(p->p_ucred, PRISON_ROOT))
194 if (so->so_cred->cr_uid != 0 &&
195 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
196 t = in6_pcblookup_local(pcbinfo,
197 &sin6->sin6_addr, lport,
200 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
201 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
202 (t->inp_socket->so_options &
203 SO_REUSEPORT) == 0) &&
204 (so->so_cred->cr_uid !=
205 t->inp_socket->so_cred->cr_uid))
207 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
208 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
209 struct sockaddr_in sin;
211 in6_sin6_2_sin(&sin, sin6);
212 t = in_pcblookup_local(pcbinfo,
216 (so->so_cred->cr_uid !=
217 t->inp_socket->so_cred->cr_uid) &&
218 (ntohl(t->inp_laddr.s_addr) !=
221 INP_SOCKAF(t->inp_socket)))
225 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
227 if (t && (reuseport & t->inp_socket->so_options) == 0)
229 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
230 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
231 struct sockaddr_in sin;
233 in6_sin6_2_sin(&sin, sin6);
234 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
237 (reuseport & t->inp_socket->so_options)
239 (ntohl(t->inp_laddr.s_addr)
242 INP_SOCKAF(t->inp_socket)))
246 inp->in6p_laddr = sin6->sin6_addr;
250 if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, td)) != 0)
254 inp->inp_lport = lport;
255 if (in_pcbinsporthash(inp) != 0) {
256 inp->in6p_laddr = in6addr_any;
261 in_pcbinsbindhash(inp);
266 * Transform old in6_pcbconnect() into an inner subroutine for new
267 * in6_pcbconnect(): Do some validity-checking on the remote
268 * address (in mbuf 'nam') and then determine local host address
269 * (i.e., which interface) to use to access that remote host.
271 * This preserves definition of in6_pcbconnect(), while supporting a
272 * slightly different version for T/TCP. (This is more than
273 * a bit of a kludge, but cleaning up the internal interfaces would
274 * have forced minor changes in every protocol).
278 in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
279 struct in6_addr **plocal_addr6)
281 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
282 struct ifnet *ifp = NULL;
285 if (nam->sa_len != sizeof (*sin6))
287 if (sin6->sin6_family != AF_INET6)
288 return (EAFNOSUPPORT);
289 if (sin6->sin6_port == 0)
290 return (EADDRNOTAVAIL);
292 /* KAME hack: embed scopeid */
293 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0)
298 * If the destination address is UNSPECIFIED addr,
299 * use the loopback addr, e.g ::1.
301 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
302 sin6->sin6_addr = in6addr_loopback;
306 * XXX: in6_selectsrc might replace the bound local address
307 * with the address specified by setsockopt(IPV6_PKTINFO).
308 * Is it the intended behavior?
310 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts,
313 &inp->in6p_laddr, &error);
314 if (*plocal_addr6 == 0) {
316 error = EADDRNOTAVAIL;
320 * Don't do pcblookup call here; return interface in
322 * and exit to caller, that will do the lookup.
326 if (inp->in6p_route.ro_rt)
327 ifp = inp->in6p_route.ro_rt->rt_ifp;
334 * Connect from a socket to a specified address.
335 * Both address and port must be specified in argument sin.
336 * If don't have a local address for this socket yet,
340 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
342 struct in6_addr *addr6;
343 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
347 * Call inner routine, to assign local interface address.
348 * in6_pcbladdr() may automatically fill in sin6_scope_id.
350 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
353 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr,
355 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
356 ? addr6 : &inp->in6p_laddr,
357 inp->inp_lport, 0, NULL) != NULL) {
360 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
361 if (inp->inp_lport == 0) {
362 error = in6_pcbbind(inp, (struct sockaddr *)0, td);
366 inp->in6p_laddr = *addr6;
368 inp->in6p_faddr = sin6->sin6_addr;
369 inp->inp_fport = sin6->sin6_port;
370 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
371 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
372 if (inp->in6p_flags & IN6P_AUTOFLOWLABEL)
373 inp->in6p_flowinfo |=
374 (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK);
376 in_pcbrehash(inp, INP_CONNECTED);
382 * Return an IPv6 address, which is the most appropriate for given
383 * destination and user specified options.
384 * If necessary, this function lookups the routing table and return
385 * an entry to the caller for later use.
388 in6_selectsrc(dstsock, opts, mopts, ro, laddr, errorp)
389 struct sockaddr_in6 *dstsock;
390 struct ip6_pktopts *opts;
391 struct ip6_moptions *mopts;
392 struct route_in6 *ro;
393 struct in6_addr *laddr;
396 struct in6_addr *dst;
397 struct in6_ifaddr *ia6 = 0;
398 struct in6_pktinfo *pi = NULL;
400 dst = &dstsock->sin6_addr;
404 * If the source address is explicitly specified by the caller,
407 if (opts && (pi = opts->ip6po_pktinfo) &&
408 !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr))
409 return(&pi->ipi6_addr);
412 * If the source address is not specified but the socket(if any)
413 * is already bound, use the bound address.
415 if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr))
419 * If the caller doesn't specify the source address but
420 * the outgoing interface, use an address associated with
423 if (pi && pi->ipi6_ifindex) {
424 /* XXX boundary check is assumed to be already done. */
425 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex],
428 *errorp = EADDRNOTAVAIL;
431 return(&satosin6(&ia6->ia_addr)->sin6_addr);
435 * If the destination address is a link-local unicast address or
436 * a multicast address, and if the outgoing interface is specified
437 * by the sin6_scope_id filed, use an address associated with the
439 * XXX: We're now trying to define more specific semantics of
440 * sin6_scope_id field, so this part will be rewritten in
443 if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) &&
444 dstsock->sin6_scope_id) {
446 * I'm not sure if boundary check for scope_id is done
449 if (dstsock->sin6_scope_id < 0 ||
450 if_index < dstsock->sin6_scope_id) {
451 *errorp = ENXIO; /* XXX: better error? */
454 ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id],
457 *errorp = EADDRNOTAVAIL;
460 return(&satosin6(&ia6->ia_addr)->sin6_addr);
464 * If the destination address is a multicast address and
465 * the outgoing interface for the address is specified
466 * by the caller, use an address associated with the interface.
467 * There is a sanity check here; if the destination has node-local
468 * scope, the outgoing interfacde should be a loopback address.
469 * Even if the outgoing interface is not specified, we also
470 * choose a loopback interface as the outgoing interface.
472 if (IN6_IS_ADDR_MULTICAST(dst)) {
473 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL;
475 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) {
480 ia6 = in6_ifawithscope(ifp, dst);
482 *errorp = EADDRNOTAVAIL;
485 return(&ia6->ia_addr.sin6_addr);
490 * If the next hop address for the packet is specified
491 * by caller, use an address associated with the route
495 struct sockaddr_in6 *sin6_next;
498 if (opts && opts->ip6po_nexthop) {
499 sin6_next = satosin6(opts->ip6po_nexthop);
500 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL);
502 ia6 = in6_ifawithscope(rt->rt_ifp, dst);
504 ia6 = ifatoia6(rt->rt_ifa);
507 *errorp = EADDRNOTAVAIL;
510 return(&satosin6(&ia6->ia_addr)->sin6_addr);
515 * If route is known or can be allocated now,
516 * our src addr is taken from the i/f, else punt.
520 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) {
522 ro->ro_rt = (struct rtentry *)0;
524 if (ro->ro_rt == (struct rtentry *)0 ||
525 ro->ro_rt->rt_ifp == (struct ifnet *)0) {
526 struct sockaddr_in6 *dst6;
528 /* No route yet, so try to acquire one */
529 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6));
530 dst6 = (struct sockaddr_in6 *)&ro->ro_dst;
531 dst6->sin6_family = AF_INET6;
532 dst6->sin6_len = sizeof(struct sockaddr_in6);
533 dst6->sin6_addr = *dst;
534 if (IN6_IS_ADDR_MULTICAST(dst)) {
535 ro->ro_rt = rtalloc1(&((struct route *)ro)
538 rtalloc((struct route *)ro);
543 * in_pcbconnect() checks out IFF_LOOPBACK to skip using
544 * the address. But we don't know why it does so.
545 * It is necessary to ensure the scope even for lo0
546 * so doesn't check out IFF_LOOPBACK.
550 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst);
551 if (ia6 == 0) /* xxx scope error ?*/
552 ia6 = ifatoia6(ro->ro_rt->rt_ifa);
555 *errorp = EHOSTUNREACH; /* no route */
558 return(&satosin6(&ia6->ia_addr)->sin6_addr);
561 *errorp = EADDRNOTAVAIL;
566 * Default hop limit selection. The precedence is as follows:
567 * 1. Hoplimit valued specified via ioctl.
568 * 2. (If the outgoing interface is detected) the current
569 * hop limit of the interface specified by router advertisement.
570 * 3. The system default hoplimit.
573 in6_selecthlim(in6p, ifp)
577 if (in6p && in6p->in6p_hops >= 0)
578 return(in6p->in6p_hops);
580 return(nd_ifinfo[ifp->if_index].chlim);
587 in6_pcbdisconnect(inp)
590 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
592 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
593 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
594 in_pcbremconnhash(inp);
595 if (inp->inp_socket->so_state & SS_NOFDREF)
603 struct socket *so = inp->inp_socket;
604 struct inpcbinfo *ipi = inp->inp_pcbinfo;
607 if (inp->in6p_sp != NULL)
608 ipsec6_delete_pcbpolicy(inp);
610 inp->inp_gencnt = ++ipi->ipi_gencnt;
615 if (inp->in6p_options)
616 m_freem(inp->in6p_options);
617 ip6_freepcbopts(inp->in6p_outputopts);
618 ip6_freemoptions(inp->in6p_moptions);
619 if (inp->in6p_route.ro_rt)
620 rtfree(inp->in6p_route.ro_rt);
621 /* Check and free IPv4 related resources in case of mapped addr */
622 if (inp->inp_options)
623 (void)m_free(inp->inp_options);
624 ip_freemoptions(inp->inp_moptions);
627 zfree(ipi->ipi_zone, inp);
631 * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was
632 * modified to match the pru_sockaddr() and pru_peeraddr() entry points
633 * in struct pr_usrreqs, so that protocols can just reference then directly
634 * without the need for a wrapper function. The socket must have a valid
635 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
636 * except through a kernel programming error, so it is acceptable to panic
637 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
638 * because there actually /is/ a programming error somewhere... XXX)
641 in6_setsockaddr(so, nam)
643 struct sockaddr **nam;
647 struct sockaddr_in6 *sin6;
650 * Do the malloc first in case it blocks.
652 MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK);
653 bzero(sin6, sizeof *sin6);
654 sin6->sin6_family = AF_INET6;
655 sin6->sin6_len = sizeof(*sin6);
661 free(sin6, M_SONAME);
664 sin6->sin6_port = inp->inp_lport;
665 sin6->sin6_addr = inp->in6p_laddr;
667 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
668 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
670 sin6->sin6_scope_id = 0; /*XXX*/
671 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
672 sin6->sin6_addr.s6_addr16[1] = 0;
674 *nam = (struct sockaddr *)sin6;
679 in6_setpeeraddr(so, nam)
681 struct sockaddr **nam;
685 struct sockaddr_in6 *sin6;
688 * Do the malloc first in case it blocks.
690 MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME, M_WAITOK);
691 bzero((caddr_t)sin6, sizeof (*sin6));
692 sin6->sin6_family = AF_INET6;
693 sin6->sin6_len = sizeof(struct sockaddr_in6);
699 free(sin6, M_SONAME);
702 sin6->sin6_port = inp->inp_fport;
703 sin6->sin6_addr = inp->in6p_faddr;
705 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
706 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
708 sin6->sin6_scope_id = 0; /*XXX*/
709 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
710 sin6->sin6_addr.s6_addr16[1] = 0;
712 *nam = (struct sockaddr *)sin6;
717 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
719 struct inpcb *inp = sotoinpcb(so);
724 if (inp->inp_vflag & INP_IPV4) {
725 error = in_setsockaddr(so, nam);
727 in6_sin_2_v4mapsin6_in_sock(nam);
729 /* scope issues will be handled in in6_setsockaddr(). */
730 error = in6_setsockaddr(so, nam);
736 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
738 struct inpcb *inp = sotoinpcb(so);
743 if (inp->inp_vflag & INP_IPV4) {
744 error = in_setpeeraddr(so, nam);
746 in6_sin_2_v4mapsin6_in_sock(nam);
748 /* scope issues will be handled in in6_setpeeraddr(). */
749 error = in6_setpeeraddr(so, nam);
755 * Pass some notification to all connections of a protocol
756 * associated with address dst. The local address and/or port numbers
757 * may be specified to limit the search. The "usual action" will be
758 * taken, depending on the ctlinput cmd. The caller must filter any
759 * cmds that are uninteresting (e.g., no error in the map).
760 * Call the protocol specific routine (if any) to report
761 * any errors for each matching socket.
763 * Must be called at splnet.
766 in6_pcbnotify(head, dst, fport_arg, src, lport_arg, cmd, notify)
767 struct inpcbhead *head;
768 struct sockaddr *dst;
770 const struct sockaddr *src;
773 void (*notify) (struct inpcb *, int);
775 struct inpcb *inp, *ninp;
776 struct sockaddr_in6 sa6_src, *sa6_dst;
777 u_short fport = fport_arg, lport = lport_arg;
781 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6)
784 sa6_dst = (struct sockaddr_in6 *)dst;
785 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
789 * note that src can be NULL when we get notify by local fragmentation.
791 sa6_src = (src == NULL) ? sa6_any : *(struct sockaddr_in6 *)src;
792 flowinfo = sa6_src.sin6_flowinfo;
795 * Redirects go to all references to the destination,
796 * and use in6_rtchange to invalidate the route cache.
797 * Dead host indications: also use in6_rtchange to invalidate
798 * the cache, and deliver the error to all the sockets.
799 * Otherwise, if we have knowledge of the local port and address,
800 * deliver only to that socket.
802 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
805 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
807 if (cmd != PRC_HOSTDEAD)
808 notify = in6_rtchange;
810 errno = inet6ctlerrmap[cmd];
812 for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
813 ninp = LIST_NEXT(inp, inp_list);
815 if ((inp->inp_vflag & INP_IPV6) == 0)
819 * Detect if we should notify the error. If no source and
820 * destination ports are specifed, but non-zero flowinfo and
821 * local address match, notify the error. This is the case
822 * when the error is delivered with an encrypted buffer
823 * by ESP. Otherwise, just compare addresses and ports
826 if (lport == 0 && fport == 0 && flowinfo &&
827 inp->inp_socket != NULL &&
828 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
829 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
831 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
832 &sa6_dst->sin6_addr) ||
833 inp->inp_socket == 0 ||
834 (lport && inp->inp_lport != lport) ||
835 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
836 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
837 &sa6_src.sin6_addr)) ||
838 (fport && inp->inp_fport != fport))
843 (*notify)(inp, errno);
849 * Lookup a PCB based on the local address and port.
852 in6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay)
853 struct inpcbinfo *pcbinfo;
854 struct in6_addr *laddr;
859 int matchwild = 3, wildcard;
860 u_short lport = lport_arg;
861 struct inpcbporthead *porthash;
862 struct inpcbport *phd;
863 struct inpcb *match = NULL;
866 * Best fit PCB lookup.
868 * First see if this local port is in use by looking on the
871 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
872 pcbinfo->porthashmask)];
873 LIST_FOREACH(phd, porthash, phd_hash) {
874 if (phd->phd_port == lport)
879 * Port is in use by one or more PCBs. Look for best
882 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
884 if ((inp->inp_vflag & INP_IPV6) == 0)
886 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
888 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
889 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
891 else if (!IN6_ARE_ADDR_EQUAL(
892 &inp->in6p_laddr, laddr))
895 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
898 if (wildcard && !wild_okay)
900 if (wildcard < matchwild) {
905 matchwild = wildcard;
913 in6_pcbpurgeif0(head, ifp)
918 struct ip6_moptions *im6o;
919 struct in6_multi_mship *imm, *nimm;
921 for (in6p = head; in6p != NULL; in6p = LIST_NEXT(in6p, inp_list)) {
922 im6o = in6p->in6p_moptions;
923 if ((in6p->inp_vflag & INP_IPV6) &&
926 * Unselect the outgoing interface if it is being
929 if (im6o->im6o_multicast_ifp == ifp)
930 im6o->im6o_multicast_ifp = NULL;
933 * Drop multicast group membership if we joined
934 * through the interface being detached.
935 * XXX controversial - is it really legal for kernel
938 for (imm = im6o->im6o_memberships.lh_first;
939 imm != NULL; imm = nimm) {
940 nimm = imm->i6mm_chain.le_next;
941 if (imm->i6mm_maddr->in6m_ifp == ifp) {
942 LIST_REMOVE(imm, i6mm_chain);
943 in6_delmulti(imm->i6mm_maddr);
944 free(imm, M_IPMADDR);
952 * Check for alternatives when higher level complains
953 * about service problems. For now, invalidate cached
954 * routing information. If the route was created dynamically
955 * (by a redirect), time to try a default gateway again.
962 struct rt_addrinfo info;
964 if ((rt = in6p->in6p_route.ro_rt) != NULL) {
965 bzero((caddr_t)&info, sizeof(info));
966 info.rti_flags = rt->rt_flags;
967 info.rti_info[RTAX_DST] = rt_key(rt);
968 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
969 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
970 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
971 if (rt->rt_flags & RTF_DYNAMIC)
972 (void)rtrequest1(RTM_DELETE, &info, NULL);
973 in6p->in6p_route.ro_rt = NULL;
976 * A new route can be allocated
977 * the next time output is attempted.
983 * After a routing change, flush old routing
984 * and allocate a (hopefully) better one.
987 in6_rtchange(inp, errno)
991 if (inp->in6p_route.ro_rt) {
992 rtfree(inp->in6p_route.ro_rt);
993 inp->in6p_route.ro_rt = 0;
995 * A new route can be allocated the next time
996 * output is attempted.
1002 * Lookup PCB in hash list.
1005 in6_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp)
1006 struct inpcbinfo *pcbinfo;
1007 struct in6_addr *faddr, *laddr;
1008 u_int fport_arg, lport_arg;
1012 struct inpcbhead *head;
1014 u_short fport = fport_arg, lport = lport_arg;
1017 if (faithprefix_p != NULL)
1018 faith = (*faithprefix_p)(laddr);
1023 * First look for an exact match.
1025 head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr->s6_addr32[3] /* XXX */,
1027 laddr->s6_addr32[3], /* XXX JH */
1029 pcbinfo->hashmask)];
1030 LIST_FOREACH(inp, head, inp_hash) {
1031 if ((inp->inp_vflag & INP_IPV6) == 0)
1033 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1034 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1035 inp->inp_fport == fport &&
1036 inp->inp_lport == lport) {
1044 struct inpcb *local_wild = NULL;
1046 head = &pcbinfo->hashbase[INP_PCBBINDHASH(lport,
1047 pcbinfo->hashmask)];
1048 LIST_FOREACH(inp, head, inp_hash) {
1049 if ((inp->inp_vflag & INP_IPV6) == 0)
1051 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
1052 inp->inp_lport == lport) {
1053 if (faith && (inp->inp_flags & INP_FAITH) == 0)
1055 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
1058 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
1062 return (local_wild);
1072 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1076 ip = mtod(m, struct ip6_hdr *);
1077 bzero(sin6, sizeof(*sin6));
1078 sin6->sin6_len = sizeof(*sin6);
1079 sin6->sin6_family = AF_INET6;
1080 sin6->sin6_addr = ip->ip6_src;
1081 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1082 sin6->sin6_addr.s6_addr16[1] = 0;
1083 sin6->sin6_scope_id =
1084 (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1085 ? m->m_pkthdr.rcvif->if_index : 0;