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 1.27 2005/06/03 19:56:08 eirikn 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.
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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>
87 #include <sys/thread2.h>
89 #include <vm/vm_zone.h>
92 #include <net/if_types.h>
93 #include <net/route.h>
95 #include <netinet/in.h>
96 #include <netinet/in_var.h>
97 #include <netinet/in_systm.h>
98 #include <netinet/ip6.h>
99 #include <netinet/ip_var.h>
100 #include <netinet6/ip6_var.h>
101 #include <netinet6/nd6.h>
102 #include <netinet/in_pcb.h>
103 #include <netinet6/in6_pcb.h>
106 #include <netinet6/ipsec.h>
108 #include <netinet6/ipsec6.h>
110 #include <netinet6/ah.h>
112 #include <netinet6/ah6.h>
114 #include <netproto/key/key.h>
118 #include <netproto/ipsec/ipsec.h>
119 #include <netproto/ipsec/ipsec6.h>
120 #include <netproto/ipsec/key.h>
122 #endif /* FAST_IPSEC */
124 struct in6_addr zeroin6_addr;
127 in6_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
129 struct socket *so = inp->inp_socket;
130 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
131 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
133 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
135 if (!in6_ifaddr) /* XXX broken! */
136 return (EADDRNOTAVAIL);
137 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
139 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
142 sin6 = (struct sockaddr_in6 *)nam;
143 if (nam->sa_len != sizeof(*sin6))
148 if (nam->sa_family != AF_INET6)
149 return(EAFNOSUPPORT);
151 /* KAME hack: embed scopeid */
152 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0)
154 /* this must be cleared for ifa_ifwithaddr() */
155 sin6->sin6_scope_id = 0;
157 lport = sin6->sin6_port;
158 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
160 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
161 * allow compepte duplication of binding if
162 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
163 * and a multicast address is bound on both
164 * new and duplicated sockets.
166 if (so->so_options & SO_REUSEADDR)
167 reuseport = SO_REUSEADDR|SO_REUSEPORT;
168 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
169 struct ifaddr *ia = NULL;
171 sin6->sin6_port = 0; /* yech... */
172 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
173 return(EADDRNOTAVAIL);
176 * XXX: bind to an anycast address might accidentally
177 * cause sending a packet with anycast source address.
178 * We should allow to bind to a deprecated address, since
179 * the application dare to use it.
182 ((struct in6_ifaddr *)ia)->ia6_flags &
183 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
184 return(EADDRNOTAVAIL);
189 struct proc *p = td->td_proc; /* may be NULL */
192 if (ntohs(lport) < IPV6PORT_RESERVED && p &&
193 suser_cred(p->p_ucred, PRISON_ROOT))
195 if (so->so_cred->cr_uid != 0 &&
196 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
197 t = in6_pcblookup_local(pcbinfo,
198 &sin6->sin6_addr, lport,
201 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
202 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
203 (t->inp_socket->so_options &
204 SO_REUSEPORT) == 0) &&
205 (so->so_cred->cr_uid !=
206 t->inp_socket->so_cred->cr_uid))
208 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
209 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
210 struct sockaddr_in sin;
212 in6_sin6_2_sin(&sin, sin6);
213 t = in_pcblookup_local(pcbinfo,
217 (so->so_cred->cr_uid !=
218 t->inp_socket->so_cred->cr_uid) &&
219 (ntohl(t->inp_laddr.s_addr) !=
222 INP_SOCKAF(t->inp_socket)))
226 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
228 if (t && (reuseport & t->inp_socket->so_options) == 0)
230 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
231 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
232 struct sockaddr_in sin;
234 in6_sin6_2_sin(&sin, sin6);
235 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
238 (reuseport & t->inp_socket->so_options)
240 (ntohl(t->inp_laddr.s_addr)
243 INP_SOCKAF(t->inp_socket)))
247 inp->in6p_laddr = sin6->sin6_addr;
251 if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, td)) != 0)
255 inp->inp_lport = lport;
256 if (in_pcbinsporthash(inp) != 0) {
257 inp->in6p_laddr = in6addr_any;
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_cpcbinfo, &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_pcbinsconnhash(inp);
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(struct sockaddr_in6 *dstsock, struct ip6_pktopts *opts,
389 struct ip6_moptions *mopts, struct route_in6 *ro,
390 struct in6_addr *laddr, int *errorp)
392 struct in6_addr *dst;
393 struct in6_ifaddr *ia6 = 0;
394 struct in6_pktinfo *pi = NULL;
396 dst = &dstsock->sin6_addr;
400 * If the source address is explicitly specified by the caller,
403 if (opts && (pi = opts->ip6po_pktinfo) &&
404 !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr))
405 return(&pi->ipi6_addr);
408 * If the source address is not specified but the socket(if any)
409 * is already bound, use the bound address.
411 if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr))
415 * If the caller doesn't specify the source address but
416 * the outgoing interface, use an address associated with
419 if (pi && pi->ipi6_ifindex) {
420 /* XXX boundary check is assumed to be already done. */
421 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex],
424 *errorp = EADDRNOTAVAIL;
427 return(&satosin6(&ia6->ia_addr)->sin6_addr);
431 * If the destination address is a link-local unicast address or
432 * a multicast address, and if the outgoing interface is specified
433 * by the sin6_scope_id filed, use an address associated with the
435 * XXX: We're now trying to define more specific semantics of
436 * sin6_scope_id field, so this part will be rewritten in
439 if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) &&
440 dstsock->sin6_scope_id) {
442 * I'm not sure if boundary check for scope_id is done
445 if (dstsock->sin6_scope_id < 0 ||
446 if_index < dstsock->sin6_scope_id) {
447 *errorp = ENXIO; /* XXX: better error? */
450 ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id],
453 *errorp = EADDRNOTAVAIL;
456 return(&satosin6(&ia6->ia_addr)->sin6_addr);
460 * If the destination address is a multicast address and
461 * the outgoing interface for the address is specified
462 * by the caller, use an address associated with the interface.
463 * There is a sanity check here; if the destination has node-local
464 * scope, the outgoing interfacde should be a loopback address.
465 * Even if the outgoing interface is not specified, we also
466 * choose a loopback interface as the outgoing interface.
468 if (IN6_IS_ADDR_MULTICAST(dst)) {
469 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL;
471 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) {
476 ia6 = in6_ifawithscope(ifp, dst);
478 *errorp = EADDRNOTAVAIL;
481 return(&ia6->ia_addr.sin6_addr);
486 * If the next hop address for the packet is specified
487 * by caller, use an address associated with the route
491 struct sockaddr_in6 *sin6_next;
494 if (opts && opts->ip6po_nexthop) {
495 sin6_next = satosin6(opts->ip6po_nexthop);
496 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL);
498 ia6 = in6_ifawithscope(rt->rt_ifp, dst);
500 ia6 = ifatoia6(rt->rt_ifa);
503 *errorp = EADDRNOTAVAIL;
506 return(&satosin6(&ia6->ia_addr)->sin6_addr);
511 * If route is known or can be allocated now,
512 * our src addr is taken from the i/f, else punt.
516 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) {
520 if (ro->ro_rt == NULL || ro->ro_rt->rt_ifp == NULL) {
521 struct sockaddr_in6 *dst6;
523 /* No route yet, so try to acquire one */
524 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6));
526 dst6->sin6_family = AF_INET6;
527 dst6->sin6_len = sizeof(struct sockaddr_in6);
528 dst6->sin6_addr = *dst;
529 if (IN6_IS_ADDR_MULTICAST(dst)) {
531 rtpurelookup((struct sockaddr *)&ro->ro_dst);
533 rtalloc((struct route *)ro);
538 * in_pcbconnect() checks out IFF_LOOPBACK to skip using
539 * the address. But we don't know why it does so.
540 * It is necessary to ensure the scope even for lo0
541 * so doesn't check out IFF_LOOPBACK.
545 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst);
546 if (ia6 == 0) /* xxx scope error ?*/
547 ia6 = ifatoia6(ro->ro_rt->rt_ifa);
550 *errorp = EHOSTUNREACH; /* no route */
553 return(&satosin6(&ia6->ia_addr)->sin6_addr);
556 *errorp = EADDRNOTAVAIL;
561 * Default hop limit selection. The precedence is as follows:
562 * 1. Hoplimit valued specified via ioctl.
563 * 2. (If the outgoing interface is detected) the current
564 * hop limit of the interface specified by router advertisement.
565 * 3. The system default hoplimit.
568 in6_selecthlim(struct in6pcb *in6p, struct ifnet *ifp)
570 if (in6p && in6p->in6p_hops >= 0)
571 return(in6p->in6p_hops);
573 return(ND_IFINFO(ifp)->chlim);
580 in6_pcbdisconnect(struct inpcb *inp)
582 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
584 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
585 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
586 in_pcbremconnhash(inp);
587 if (inp->inp_socket->so_state & SS_NOFDREF)
592 in6_pcbdetach(struct inpcb *inp)
594 struct socket *so = inp->inp_socket;
595 struct inpcbinfo *ipi = inp->inp_pcbinfo;
598 if (inp->in6p_sp != NULL)
599 ipsec6_delete_pcbpolicy(inp);
601 inp->inp_gencnt = ++ipi->ipi_gencnt;
606 if (inp->in6p_options)
607 m_freem(inp->in6p_options);
608 ip6_freepcbopts(inp->in6p_outputopts);
609 ip6_freemoptions(inp->in6p_moptions);
610 if (inp->in6p_route.ro_rt)
611 rtfree(inp->in6p_route.ro_rt);
612 /* Check and free IPv4 related resources in case of mapped addr */
613 if (inp->inp_options)
614 m_free(inp->inp_options);
615 ip_freemoptions(inp->inp_moptions);
618 zfree(ipi->ipi_zone, inp);
622 * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was
623 * modified to match the pru_sockaddr() and pru_peeraddr() entry points
624 * in struct pr_usrreqs, so that protocols can just reference then directly
625 * without the need for a wrapper function. The socket must have a valid
626 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
627 * except through a kernel programming error, so it is acceptable to panic
628 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
629 * because there actually /is/ a programming error somewhere... XXX)
632 in6_setsockaddr(struct socket *so, struct sockaddr **nam)
635 struct sockaddr_in6 *sin6;
638 * Do the malloc first in case it blocks.
640 MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK);
641 bzero(sin6, sizeof *sin6);
642 sin6->sin6_family = AF_INET6;
643 sin6->sin6_len = sizeof(*sin6);
649 free(sin6, M_SONAME);
652 sin6->sin6_port = inp->inp_lport;
653 sin6->sin6_addr = inp->in6p_laddr;
655 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
656 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
658 sin6->sin6_scope_id = 0; /*XXX*/
659 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
660 sin6->sin6_addr.s6_addr16[1] = 0;
662 *nam = (struct sockaddr *)sin6;
667 in6_setpeeraddr(struct socket *so, struct sockaddr **nam)
670 struct sockaddr_in6 *sin6;
673 * Do the malloc first in case it blocks.
675 MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME, M_WAITOK);
676 bzero((caddr_t)sin6, sizeof (*sin6));
677 sin6->sin6_family = AF_INET6;
678 sin6->sin6_len = sizeof(struct sockaddr_in6);
684 free(sin6, M_SONAME);
687 sin6->sin6_port = inp->inp_fport;
688 sin6->sin6_addr = inp->in6p_faddr;
690 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
691 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
693 sin6->sin6_scope_id = 0; /*XXX*/
694 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
695 sin6->sin6_addr.s6_addr16[1] = 0;
697 *nam = (struct sockaddr *)sin6;
702 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
704 struct inpcb *inp = so->so_pcb;
709 if (inp->inp_vflag & INP_IPV4) {
710 error = in_setsockaddr(so, nam);
712 in6_sin_2_v4mapsin6_in_sock(nam);
714 /* scope issues will be handled in in6_setsockaddr(). */
715 error = in6_setsockaddr(so, nam);
721 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
723 struct inpcb *inp = so->so_pcb;
728 if (inp->inp_vflag & INP_IPV4) {
729 error = in_setpeeraddr(so, nam);
731 in6_sin_2_v4mapsin6_in_sock(nam);
733 /* scope issues will be handled in in6_setpeeraddr(). */
734 error = in6_setpeeraddr(so, nam);
740 * Pass some notification to all connections of a protocol
741 * associated with address dst. The local address and/or port numbers
742 * may be specified to limit the search. The "usual action" will be
743 * taken, depending on the ctlinput cmd. The caller must filter any
744 * cmds that are uninteresting (e.g., no error in the map).
745 * Call the protocol specific routine (if any) to report
746 * any errors for each matching socket.
748 * Must be called under crit_enter().
751 in6_pcbnotify(struct inpcbhead *head, struct sockaddr *dst, in_port_t fport,
752 const struct sockaddr *src, in_port_t lport, int cmd, int arg,
753 void (*notify) (struct inpcb *, int))
755 struct inpcb *inp, *ninp;
756 struct sockaddr_in6 sa6_src, *sa6_dst;
759 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
762 sa6_dst = (struct sockaddr_in6 *)dst;
763 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
767 * note that src can be NULL when we get notify by local fragmentation.
769 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
770 flowinfo = sa6_src.sin6_flowinfo;
773 * Redirects go to all references to the destination,
774 * and use in6_rtchange to invalidate the route cache.
775 * Dead host indications: also use in6_rtchange to invalidate
776 * the cache, and deliver the error to all the sockets.
777 * Otherwise, if we have knowledge of the local port and address,
778 * deliver only to that socket.
780 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
783 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
785 if (cmd != PRC_HOSTDEAD)
786 notify = in6_rtchange;
788 if (cmd != PRC_MSGSIZE)
789 arg = inet6ctlerrmap[cmd];
791 for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
792 ninp = LIST_NEXT(inp, inp_list);
794 if (inp->inp_flags & INP_PLACEMARKER)
797 if ((inp->inp_vflag & INP_IPV6) == 0)
801 * Detect if we should notify the error. If no source and
802 * destination ports are specifed, but non-zero flowinfo and
803 * local address match, notify the error. This is the case
804 * when the error is delivered with an encrypted buffer
805 * by ESP. Otherwise, just compare addresses and ports
808 if (lport == 0 && fport == 0 && flowinfo &&
809 inp->inp_socket != NULL &&
810 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
811 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
813 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
814 &sa6_dst->sin6_addr) ||
815 inp->inp_socket == 0 ||
816 (lport && inp->inp_lport != lport) ||
817 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
818 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
819 &sa6_src.sin6_addr)) ||
820 (fport && inp->inp_fport != fport))
831 * Lookup a PCB based on the local address and port.
834 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
835 u_int lport_arg, int wild_okay)
838 int matchwild = 3, wildcard;
839 u_short lport = lport_arg;
840 struct inpcbporthead *porthash;
841 struct inpcbport *phd;
842 struct inpcb *match = NULL;
845 * Best fit PCB lookup.
847 * First see if this local port is in use by looking on the
850 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
851 pcbinfo->porthashmask)];
852 LIST_FOREACH(phd, porthash, phd_hash) {
853 if (phd->phd_port == lport)
858 * Port is in use by one or more PCBs. Look for best
861 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
863 if ((inp->inp_vflag & INP_IPV6) == 0)
865 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
867 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
868 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
870 else if (!IN6_ARE_ADDR_EQUAL(
871 &inp->in6p_laddr, laddr))
874 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
877 if (wildcard && !wild_okay)
879 if (wildcard < matchwild) {
884 matchwild = wildcard;
892 in6_pcbpurgeif0(struct in6pcb *head, struct ifnet *ifp)
895 struct ip6_moptions *im6o;
896 struct in6_multi_mship *imm, *nimm;
898 for (in6p = head; in6p != NULL; in6p = LIST_NEXT(in6p, inp_list)) {
899 if (in6p->in6p_flags & INP_PLACEMARKER)
901 im6o = in6p->in6p_moptions;
902 if ((in6p->inp_vflag & INP_IPV6) &&
905 * Unselect the outgoing interface if it is being
908 if (im6o->im6o_multicast_ifp == ifp)
909 im6o->im6o_multicast_ifp = NULL;
912 * Drop multicast group membership if we joined
913 * through the interface being detached.
914 * XXX controversial - is it really legal for kernel
917 for (imm = im6o->im6o_memberships.lh_first;
918 imm != NULL; imm = nimm) {
919 nimm = imm->i6mm_chain.le_next;
920 if (imm->i6mm_maddr->in6m_ifp == ifp) {
921 LIST_REMOVE(imm, i6mm_chain);
922 in6_delmulti(imm->i6mm_maddr);
923 free(imm, M_IPMADDR);
931 * Check for alternatives when higher level complains
932 * about service problems. For now, invalidate cached
933 * routing information. If the route was created dynamically
934 * (by a redirect), time to try a default gateway again.
937 in6_losing(struct inpcb *in6p)
940 struct rt_addrinfo info;
942 if ((rt = in6p->in6p_route.ro_rt) != NULL) {
943 bzero((caddr_t)&info, sizeof(info));
944 info.rti_flags = rt->rt_flags;
945 info.rti_info[RTAX_DST] = rt_key(rt);
946 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
947 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
948 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
949 if (rt->rt_flags & RTF_DYNAMIC)
950 rtrequest1(RTM_DELETE, &info, NULL);
951 in6p->in6p_route.ro_rt = NULL;
954 * A new route can be allocated
955 * the next time output is attempted.
961 * After a routing change, flush old routing
962 * and allocate a (hopefully) better one.
965 in6_rtchange(struct inpcb *inp, int errno)
967 if (inp->in6p_route.ro_rt) {
968 rtfree(inp->in6p_route.ro_rt);
969 inp->in6p_route.ro_rt = 0;
971 * A new route can be allocated the next time
972 * output is attempted.
978 * Lookup PCB in hash list.
981 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
982 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
983 int wildcard, struct ifnet *ifp)
985 struct inpcbhead *head;
987 u_short fport = fport_arg, lport = lport_arg;
990 if (faithprefix_p != NULL)
991 faith = (*faithprefix_p)(laddr);
996 * First look for an exact match.
998 head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr->s6_addr32[3] /* XXX */,
1000 laddr->s6_addr32[3], /* XXX JH */
1002 pcbinfo->hashmask)];
1003 LIST_FOREACH(inp, head, inp_hash) {
1004 if ((inp->inp_vflag & INP_IPV6) == 0)
1006 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1007 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1008 inp->inp_fport == fport &&
1009 inp->inp_lport == lport) {
1017 struct inpcontainerhead *chead;
1018 struct inpcontainer *ic;
1019 struct inpcb *local_wild = NULL;
1021 chead = &pcbinfo->wildcardhashbase[INP_PCBWILDCARDHASH(lport,
1022 pcbinfo->wildcardhashmask)];
1023 LIST_FOREACH(ic, chead, ic_list) {
1026 if (!(inp->inp_vflag & INP_IPV6))
1028 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
1029 inp->inp_lport == lport) {
1030 if (faith && (inp->inp_flags & INP_FAITH) == 0)
1032 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
1035 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
1039 return (local_wild);
1049 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1053 ip = mtod(m, struct ip6_hdr *);
1054 bzero(sin6, sizeof(*sin6));
1055 sin6->sin6_len = sizeof(*sin6);
1056 sin6->sin6_family = AF_INET6;
1057 sin6->sin6_addr = ip->ip6_src;
1058 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1059 sin6->sin6_addr.s6_addr16[1] = 0;
1060 sin6->sin6_scope_id =
1061 (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1062 ? m->m_pkthdr.rcvif->if_index : 0;