2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $
33 * Copyright (c) 1982, 1986, 1991, 1993
34 * The Regents of the University of California. All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 4. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
60 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94
63 #include <sys/cdefs.h>
64 __FBSDID("$FreeBSD$");
67 #include "opt_inet6.h"
68 #include "opt_ipsec.h"
71 #include <sys/param.h>
72 #include <sys/systm.h>
73 #include <sys/malloc.h>
75 #include <sys/domain.h>
76 #include <sys/protosw.h>
77 #include <sys/socket.h>
78 #include <sys/socketvar.h>
79 #include <sys/sockio.h>
80 #include <sys/errno.h>
89 #include <net/if_types.h>
90 #include <net/route.h>
92 #include <netinet/in.h>
93 #include <netinet/in_var.h>
94 #include <netinet/in_systm.h>
95 #include <netinet/tcp_var.h>
96 #include <netinet/ip6.h>
97 #include <netinet/ip_var.h>
98 #include <netinet6/ip6_var.h>
99 #include <netinet6/nd6.h>
100 #include <netinet/in_pcb.h>
101 #include <netinet6/in6_pcb.h>
102 #include <netinet6/scope6_var.h>
104 #include <security/mac/mac_framework.h>
106 struct in6_addr zeroin6_addr;
109 in6_pcbbind(register struct inpcb *inp, struct sockaddr *nam,
112 struct socket *so = inp->inp_socket;
113 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
114 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
116 int error, wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
118 INP_INFO_WLOCK_ASSERT(pcbinfo);
119 INP_WLOCK_ASSERT(inp);
121 if (!in6_ifaddr) /* XXX broken! */
122 return (EADDRNOTAVAIL);
123 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
125 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
126 wild = INPLOOKUP_WILDCARD;
128 if ((error = prison_local_ip6(cred, &inp->in6p_laddr,
129 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
132 sin6 = (struct sockaddr_in6 *)nam;
133 if (nam->sa_len != sizeof(*sin6))
138 if (nam->sa_family != AF_INET6)
139 return (EAFNOSUPPORT);
141 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0)
144 if ((error = prison_local_ip6(cred, &sin6->sin6_addr,
145 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
148 lport = sin6->sin6_port;
149 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
151 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
152 * allow compepte duplication of binding if
153 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
154 * and a multicast address is bound on both
155 * new and duplicated sockets.
157 if (so->so_options & SO_REUSEADDR)
158 reuseport = SO_REUSEADDR|SO_REUSEPORT;
159 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
160 struct ifaddr *ia = NULL;
162 sin6->sin6_port = 0; /* yech... */
163 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
164 return (EADDRNOTAVAIL);
167 * XXX: bind to an anycast address might accidentally
168 * cause sending a packet with anycast source address.
169 * We should allow to bind to a deprecated address, since
170 * the application dares to use it.
173 ((struct in6_ifaddr *)ia)->ia6_flags &
174 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
175 return (EADDRNOTAVAIL);
182 if (ntohs(lport) <= ipport_reservedhigh &&
183 ntohs(lport) >= ipport_reservedlow &&
184 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
187 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
188 priv_check_cred(inp->inp_cred,
189 PRIV_NETINET_REUSEPORT, 0) != 0) {
190 t = in6_pcblookup_local(pcbinfo,
191 &sin6->sin6_addr, lport,
192 INPLOOKUP_WILDCARD, cred);
194 ((t->inp_flags & INP_TIMEWAIT) == 0) &&
195 (so->so_type != SOCK_STREAM ||
196 IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) &&
197 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
198 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
199 (t->inp_socket->so_options & SO_REUSEPORT)
200 == 0) && (inp->inp_cred->cr_uid !=
201 t->inp_cred->cr_uid))
203 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
204 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
205 struct sockaddr_in sin;
207 in6_sin6_2_sin(&sin, sin6);
208 t = in_pcblookup_local(pcbinfo,
210 INPLOOKUP_WILDCARD, cred);
213 INP_TIMEWAIT) == 0) &&
214 (so->so_type != SOCK_STREAM ||
215 ntohl(t->inp_faddr.s_addr) ==
217 (inp->inp_cred->cr_uid !=
218 t->inp_cred->cr_uid))
222 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
224 if (t && (reuseport & ((t->inp_flags & INP_TIMEWAIT) ?
225 intotw(t)->tw_so_options :
226 t->inp_socket->so_options)) == 0)
228 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
229 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
230 struct sockaddr_in sin;
232 in6_sin6_2_sin(&sin, sin6);
233 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
235 if (t && t->inp_flags & INP_TIMEWAIT) {
237 intotw(t)->tw_so_options) == 0 &&
238 (ntohl(t->inp_laddr.s_addr) !=
239 INADDR_ANY || ((inp->inp_vflag &
241 (t->inp_vflag & INP_IPV6PROTO))))
245 (reuseport & t->inp_socket->so_options)
246 == 0 && (ntohl(t->inp_laddr.s_addr) !=
247 INADDR_ANY || INP_SOCKAF(so) ==
248 INP_SOCKAF(t->inp_socket)))
252 inp->in6p_laddr = sin6->sin6_addr;
255 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0)
258 inp->inp_lport = lport;
259 if (in_pcbinshash(inp) != 0) {
260 inp->in6p_laddr = in6addr_any;
269 * Transform old in6_pcbconnect() into an inner subroutine for new
270 * in6_pcbconnect(): Do some validity-checking on the remote
271 * address (in mbuf 'nam') and then determine local host address
272 * (i.e., which interface) to use to access that remote host.
274 * This preserves definition of in6_pcbconnect(), while supporting a
275 * slightly different version for T/TCP. (This is more than
276 * a bit of a kludge, but cleaning up the internal interfaces would
277 * have forced minor changes in every protocol).
280 in6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam,
281 struct in6_addr **plocal_addr6)
283 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
285 struct ifnet *ifp = NULL;
286 int scope_ambiguous = 0;
288 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
289 INP_WLOCK_ASSERT(inp);
291 if (nam->sa_len != sizeof (*sin6))
293 if (sin6->sin6_family != AF_INET6)
294 return (EAFNOSUPPORT);
295 if (sin6->sin6_port == 0)
296 return (EADDRNOTAVAIL);
298 if (sin6->sin6_scope_id == 0 && !ip6_use_defzone)
300 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0)
305 * If the destination address is UNSPECIFIED addr,
306 * use the loopback addr, e.g ::1.
308 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
309 sin6->sin6_addr = in6addr_loopback;
311 if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0)
315 * XXX: in6_selectsrc might replace the bound local address
316 * with the address specified by setsockopt(IPV6_PKTINFO).
317 * Is it the intended behavior?
319 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts,
323 if (ifp && scope_ambiguous &&
324 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) {
328 if (*plocal_addr6 == NULL) {
330 error = EADDRNOTAVAIL;
334 * Don't do pcblookup call here; return interface in
336 * and exit to caller, that will do the lookup.
344 * Connect from a socket to a specified address.
345 * Both address and port must be specified in argument sin.
346 * If don't have a local address for this socket yet,
350 in6_pcbconnect(register struct inpcb *inp, struct sockaddr *nam,
353 struct in6_addr *addr6;
354 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
357 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
358 INP_WLOCK_ASSERT(inp);
361 * Call inner routine, to assign local interface address.
362 * in6_pcbladdr() may automatically fill in sin6_scope_id.
364 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
367 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr,
369 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
370 ? addr6 : &inp->in6p_laddr,
371 inp->inp_lport, 0, NULL) != NULL) {
374 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
375 if (inp->inp_lport == 0) {
376 error = in6_pcbbind(inp, (struct sockaddr *)0, cred);
380 inp->in6p_laddr = *addr6;
382 inp->in6p_faddr = sin6->sin6_addr;
383 inp->inp_fport = sin6->sin6_port;
384 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
385 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
386 if (inp->inp_flags & IN6P_AUTOFLOWLABEL)
388 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
396 in6_pcbdisconnect(struct inpcb *inp)
399 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
400 INP_WLOCK_ASSERT(inp);
402 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
404 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
405 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
410 in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
412 struct sockaddr_in6 *sin6;
414 MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK);
415 bzero(sin6, sizeof *sin6);
416 sin6->sin6_family = AF_INET6;
417 sin6->sin6_len = sizeof(*sin6);
418 sin6->sin6_port = port;
419 sin6->sin6_addr = *addr_p;
420 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
422 return (struct sockaddr *)sin6;
426 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p)
428 struct sockaddr_in sin;
429 struct sockaddr_in6 *sin6_p;
431 bzero(&sin, sizeof sin);
432 sin.sin_family = AF_INET;
433 sin.sin_len = sizeof(sin);
435 sin.sin_addr = *addr_p;
437 MALLOC(sin6_p, struct sockaddr_in6 *, sizeof *sin6_p, M_SONAME,
439 in6_sin_2_v4mapsin6(&sin, sin6_p);
441 return (struct sockaddr *)sin6_p;
445 in6_getsockaddr(struct socket *so, struct sockaddr **nam)
447 register struct inpcb *inp;
448 struct in6_addr addr;
452 KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL"));
455 port = inp->inp_lport;
456 addr = inp->in6p_laddr;
459 *nam = in6_sockaddr(port, &addr);
464 in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
467 struct in6_addr addr;
471 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL"));
474 port = inp->inp_fport;
475 addr = inp->in6p_faddr;
478 *nam = in6_sockaddr(port, &addr);
483 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
489 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL"));
491 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
492 error = in_getsockaddr(so, nam);
494 in6_sin_2_v4mapsin6_in_sock(nam);
496 /* scope issues will be handled in in6_getsockaddr(). */
497 error = in6_getsockaddr(so, nam);
504 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
510 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL"));
512 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
513 error = in_getpeeraddr(so, nam);
515 in6_sin_2_v4mapsin6_in_sock(nam);
517 /* scope issues will be handled in in6_getpeeraddr(). */
518 error = in6_getpeeraddr(so, nam);
524 * Pass some notification to all connections of a protocol
525 * associated with address dst. The local address and/or port numbers
526 * may be specified to limit the search. The "usual action" will be
527 * taken, depending on the ctlinput cmd. The caller must filter any
528 * cmds that are uninteresting (e.g., no error in the map).
529 * Call the protocol specific routine (if any) to report
530 * any errors for each matching socket.
533 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst,
534 u_int fport_arg, const struct sockaddr *src, u_int lport_arg,
535 int cmd, void *cmdarg,
536 struct inpcb *(*notify)(struct inpcb *, int))
538 struct inpcb *inp, *inp_temp;
539 struct sockaddr_in6 sa6_src, *sa6_dst;
540 u_short fport = fport_arg, lport = lport_arg;
544 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
547 sa6_dst = (struct sockaddr_in6 *)dst;
548 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
552 * note that src can be NULL when we get notify by local fragmentation.
554 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
555 flowinfo = sa6_src.sin6_flowinfo;
558 * Redirects go to all references to the destination,
559 * and use in6_rtchange to invalidate the route cache.
560 * Dead host indications: also use in6_rtchange to invalidate
561 * the cache, and deliver the error to all the sockets.
562 * Otherwise, if we have knowledge of the local port and address,
563 * deliver only to that socket.
565 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
568 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
570 if (cmd != PRC_HOSTDEAD)
571 notify = in6_rtchange;
573 errno = inet6ctlerrmap[cmd];
574 INP_INFO_WLOCK(pcbinfo);
575 LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
577 if ((inp->inp_vflag & INP_IPV6) == 0) {
583 * If the error designates a new path MTU for a destination
584 * and the application (associated with this socket) wanted to
585 * know the value, notify. Note that we notify for all
586 * disconnected sockets if the corresponding application
587 * wanted. This is because some UDP applications keep sending
588 * sockets disconnected.
589 * XXX: should we avoid to notify the value to TCP sockets?
591 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 &&
592 (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
593 IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) {
594 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst,
595 (u_int32_t *)cmdarg);
599 * Detect if we should notify the error. If no source and
600 * destination ports are specifed, but non-zero flowinfo and
601 * local address match, notify the error. This is the case
602 * when the error is delivered with an encrypted buffer
603 * by ESP. Otherwise, just compare addresses and ports
606 if (lport == 0 && fport == 0 && flowinfo &&
607 inp->inp_socket != NULL &&
608 flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) &&
609 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
611 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
612 &sa6_dst->sin6_addr) ||
613 inp->inp_socket == 0 ||
614 (lport && inp->inp_lport != lport) ||
615 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
616 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
617 &sa6_src.sin6_addr)) ||
618 (fport && inp->inp_fport != fport)) {
625 if ((*notify)(inp, errno))
630 INP_INFO_WUNLOCK(pcbinfo);
634 * Lookup a PCB based on the local address and port.
637 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
638 u_short lport, int wild_okay, struct ucred *cred)
640 register struct inpcb *inp;
641 int matchwild = 3, wildcard;
643 INP_INFO_WLOCK_ASSERT(pcbinfo);
646 struct inpcbhead *head;
648 * Look for an unconnected (wildcard foreign addr) PCB that
649 * matches the local address and port we're looking for.
651 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
652 0, pcbinfo->ipi_hashmask)];
653 LIST_FOREACH(inp, head, inp_hash) {
654 /* XXX inp locking */
655 if ((inp->inp_vflag & INP_IPV6) == 0)
657 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
658 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
659 inp->inp_lport == lport) {
662 inp->inp_cred->cr_prison == cred->cr_prison)
671 struct inpcbporthead *porthash;
672 struct inpcbport *phd;
673 struct inpcb *match = NULL;
675 * Best fit PCB lookup.
677 * First see if this local port is in use by looking on the
680 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
681 pcbinfo->ipi_porthashmask)];
682 LIST_FOREACH(phd, porthash, phd_hash) {
683 if (phd->phd_port == lport)
688 * Port is in use by one or more PCBs. Look for best
691 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
694 inp->inp_cred->cr_prison != cred->cr_prison)
696 /* XXX inp locking */
697 if ((inp->inp_vflag & INP_IPV6) == 0)
699 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
701 if (!IN6_IS_ADDR_UNSPECIFIED(
703 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
705 else if (!IN6_ARE_ADDR_EQUAL(
706 &inp->in6p_laddr, laddr))
709 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
712 if (wildcard < matchwild) {
714 matchwild = wildcard;
725 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
728 struct ip6_moptions *im6o;
729 struct in6_multi_mship *imm, *nimm;
731 INP_INFO_RLOCK(pcbinfo);
732 LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) {
734 im6o = in6p->in6p_moptions;
735 if ((in6p->inp_vflag & INP_IPV6) &&
738 * Unselect the outgoing interface if it is being
741 if (im6o->im6o_multicast_ifp == ifp)
742 im6o->im6o_multicast_ifp = NULL;
745 * Drop multicast group membership if we joined
746 * through the interface being detached.
747 * XXX controversial - is it really legal for kernel
750 for (imm = im6o->im6o_memberships.lh_first;
751 imm != NULL; imm = nimm) {
752 nimm = imm->i6mm_chain.le_next;
753 if (imm->i6mm_maddr->in6m_ifp == ifp) {
754 LIST_REMOVE(imm, i6mm_chain);
755 in6_delmulti(imm->i6mm_maddr);
756 free(imm, M_IP6MADDR);
762 INP_INFO_RUNLOCK(pcbinfo);
766 * Check for alternatives when higher level complains
767 * about service problems. For now, invalidate cached
768 * routing information. If the route was created dynamically
769 * (by a redirect), time to try a default gateway again.
772 in6_losing(struct inpcb *in6p)
776 * We don't store route pointers in the routing table anymore
782 * After a routing change, flush old routing
783 * and allocate a (hopefully) better one.
786 in6_rtchange(struct inpcb *inp, int errno)
789 * We don't store route pointers in the routing table anymore
795 * Lookup PCB in hash list.
798 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
799 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, int wildcard,
802 struct inpcbhead *head;
803 struct inpcb *inp, *tmpinp;
804 u_short fport = fport_arg, lport = lport_arg;
807 INP_INFO_LOCK_ASSERT(pcbinfo);
809 if (faithprefix_p != NULL)
810 faith = (*faithprefix_p)(laddr);
815 * First look for an exact match.
818 head = &pcbinfo->ipi_hashbase[
819 INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport,
820 pcbinfo->ipi_hashmask)];
821 LIST_FOREACH(inp, head, inp_hash) {
822 /* XXX inp locking */
823 if ((inp->inp_vflag & INP_IPV6) == 0)
825 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
826 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
827 inp->inp_fport == fport &&
828 inp->inp_lport == lport) {
830 * XXX We should be able to directly return
831 * the inp here, without any checks.
832 * Well unless both bound with SO_REUSEPORT?
834 if (jailed(inp->inp_cred))
844 * Then look for a wildcard match, if requested.
846 if (wildcard == INPLOOKUP_WILDCARD) {
847 struct inpcb *local_wild = NULL, *local_exact = NULL;
848 struct inpcb *jail_wild = NULL;
852 * Order of socket selection - we always prefer jails.
853 * 1. jailed, non-wild.
855 * 3. non-jailed, non-wild.
856 * 4. non-jailed, wild.
858 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
859 0, pcbinfo->ipi_hashmask)];
860 LIST_FOREACH(inp, head, inp_hash) {
861 /* XXX inp locking */
862 if ((inp->inp_vflag & INP_IPV6) == 0)
865 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
866 inp->inp_lport != lport) {
870 /* XXX inp locking */
871 if (faith && (inp->inp_flags & INP_FAITH) == 0)
874 injail = jailed(inp->inp_cred);
876 if (prison_check_ip6(inp->inp_cred,
880 if (local_exact != NULL)
884 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
889 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
897 if (jail_wild != NULL)
899 if (local_exact != NULL)
900 return (local_exact);
901 if (local_wild != NULL)
903 } /* if (wildcard == INPLOOKUP_WILDCARD) */
912 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
916 ip = mtod(m, struct ip6_hdr *);
917 bzero(sin6, sizeof(*sin6));
918 sin6->sin6_len = sizeof(*sin6);
919 sin6->sin6_family = AF_INET6;
920 sin6->sin6_addr = ip->ip6_src;
922 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */