2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
3 * Copyright (c) 2010-2011 Juniper Networks, Inc.
6 * Portions of this software were developed by Robert N. M. Watson under
7 * contract to Juniper Networks, Inc.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $
37 * Copyright (c) 1982, 1986, 1991, 1993
38 * The Regents of the University of California. All rights reserved.
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
43 * 1. Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * 2. Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in the
47 * documentation and/or other materials provided with the distribution.
48 * 4. Neither the name of the University nor the names of its contributors
49 * may be used to endorse or promote products derived from this software
50 * without specific prior written permission.
52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94
67 #include <sys/cdefs.h>
68 __FBSDID("$FreeBSD$");
71 #include "opt_inet6.h"
72 #include "opt_ipsec.h"
73 #include "opt_pcbgroup.h"
76 #include <sys/param.h>
77 #include <sys/systm.h>
78 #include <sys/malloc.h>
80 #include <sys/domain.h>
81 #include <sys/protosw.h>
82 #include <sys/socket.h>
83 #include <sys/socketvar.h>
84 #include <sys/sockio.h>
85 #include <sys/errno.h>
94 #include <net/if_var.h>
95 #include <net/if_types.h>
96 #include <net/route.h>
98 #include <netinet/in.h>
99 #include <netinet/in_var.h>
100 #include <netinet/in_systm.h>
101 #include <netinet/tcp_var.h>
102 #include <netinet/ip6.h>
103 #include <netinet/ip_var.h>
105 #include <netinet6/ip6_var.h>
106 #include <netinet6/nd6.h>
107 #include <netinet/in_pcb.h>
108 #include <netinet6/in6_pcb.h>
109 #include <netinet6/scope6_var.h>
112 in6_pcbbind(register struct inpcb *inp, struct sockaddr *nam,
115 struct socket *so = inp->inp_socket;
116 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
117 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
119 int error, lookupflags = 0;
120 int reuseport = (so->so_options & SO_REUSEPORT);
122 INP_WLOCK_ASSERT(inp);
123 INP_HASH_WLOCK_ASSERT(pcbinfo);
125 if (TAILQ_EMPTY(&V_in6_ifaddrhead)) /* XXX broken! */
126 return (EADDRNOTAVAIL);
127 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
129 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
130 lookupflags = INPLOOKUP_WILDCARD;
132 if ((error = prison_local_ip6(cred, &inp->in6p_laddr,
133 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
136 sin6 = (struct sockaddr_in6 *)nam;
137 if (nam->sa_len != sizeof(*sin6))
142 if (nam->sa_family != AF_INET6)
143 return (EAFNOSUPPORT);
145 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
148 if ((error = prison_local_ip6(cred, &sin6->sin6_addr,
149 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
152 lport = sin6->sin6_port;
153 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
155 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
156 * allow compepte duplication of binding if
157 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
158 * and a multicast address is bound on both
159 * new and duplicated sockets.
161 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) != 0)
162 reuseport = SO_REUSEADDR|SO_REUSEPORT;
163 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
166 sin6->sin6_port = 0; /* yech... */
167 if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) ==
169 (inp->inp_flags & INP_BINDANY) == 0) {
170 return (EADDRNOTAVAIL);
174 * XXX: bind to an anycast address might accidentally
175 * cause sending a packet with anycast source address.
176 * We should allow to bind to a deprecated address, since
177 * the application dares to use it.
180 ((struct in6_ifaddr *)ifa)->ia6_flags &
181 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
183 return (EADDRNOTAVAIL);
193 if (ntohs(lport) <= V_ipport_reservedhigh &&
194 ntohs(lport) >= V_ipport_reservedlow &&
195 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
198 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
199 priv_check_cred(inp->inp_cred,
200 PRIV_NETINET_REUSEPORT, 0) != 0) {
201 t = in6_pcblookup_local(pcbinfo,
202 &sin6->sin6_addr, lport,
203 INPLOOKUP_WILDCARD, cred);
205 ((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
206 ((t->inp_flags & INP_TIMEWAIT) == 0) &&
207 (so->so_type != SOCK_STREAM ||
208 IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) &&
209 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
210 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
211 (t->inp_flags2 & INP_REUSEPORT) == 0) &&
212 (inp->inp_cred->cr_uid !=
213 t->inp_cred->cr_uid))
217 * If the socket is a BINDMULTI socket, then
218 * the credentials need to match and the
219 * original socket also has to have been bound
222 if (t && (! in_pcbbind_check_bindmulti(inp, t)))
226 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
227 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
228 struct sockaddr_in sin;
230 in6_sin6_2_sin(&sin, sin6);
231 t = in_pcblookup_local(pcbinfo,
233 INPLOOKUP_WILDCARD, cred);
235 ((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
237 INP_TIMEWAIT) == 0) &&
238 (so->so_type != SOCK_STREAM ||
239 ntohl(t->inp_faddr.s_addr) ==
241 (inp->inp_cred->cr_uid !=
242 t->inp_cred->cr_uid))
245 if (t && (! in_pcbbind_check_bindmulti(inp, t)))
250 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
251 lport, lookupflags, cred);
252 if (t && (t->inp_flags & INP_TIMEWAIT)) {
254 * XXXRW: If an incpb has had its timewait
255 * state recycled, we treat the address as
256 * being in use (for now). This is better
257 * than a panic, but not desirable.
261 (reuseport & tw->tw_so_options) == 0)
263 } else if (t && (reuseport & inp_so_options(t)) == 0) {
267 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
268 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
269 struct sockaddr_in sin;
271 in6_sin6_2_sin(&sin, sin6);
272 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
273 lport, lookupflags, cred);
274 if (t && t->inp_flags & INP_TIMEWAIT) {
278 if ((reuseport & tw->tw_so_options) == 0
279 && (ntohl(t->inp_laddr.s_addr) !=
280 INADDR_ANY || ((inp->inp_vflag &
282 (t->inp_vflag & INP_IPV6PROTO))))
285 (reuseport & inp_so_options(t)) == 0 &&
286 (ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
287 (t->inp_vflag & INP_IPV6PROTO) != 0))
292 inp->in6p_laddr = sin6->sin6_addr;
295 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) {
296 /* Undo an address bind that may have occurred. */
297 inp->in6p_laddr = in6addr_any;
301 inp->inp_lport = lport;
302 if (in_pcbinshash(inp) != 0) {
303 inp->in6p_laddr = in6addr_any;
312 * Transform old in6_pcbconnect() into an inner subroutine for new
313 * in6_pcbconnect(): Do some validity-checking on the remote
314 * address (in mbuf 'nam') and then determine local host address
315 * (i.e., which interface) to use to access that remote host.
317 * This preserves definition of in6_pcbconnect(), while supporting a
318 * slightly different version for T/TCP. (This is more than
319 * a bit of a kludge, but cleaning up the internal interfaces would
320 * have forced minor changes in every protocol).
323 in6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam,
324 struct in6_addr *plocal_addr6)
326 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
328 struct ifnet *ifp = NULL;
329 int scope_ambiguous = 0;
330 struct in6_addr in6a;
332 INP_WLOCK_ASSERT(inp);
333 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); /* XXXRW: why? */
335 if (nam->sa_len != sizeof (*sin6))
337 if (sin6->sin6_family != AF_INET6)
338 return (EAFNOSUPPORT);
339 if (sin6->sin6_port == 0)
340 return (EADDRNOTAVAIL);
342 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
344 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
347 if (!TAILQ_EMPTY(&V_in6_ifaddrhead)) {
349 * If the destination address is UNSPECIFIED addr,
350 * use the loopback addr, e.g ::1.
352 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
353 sin6->sin6_addr = in6addr_loopback;
355 if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0)
358 error = in6_selectsrc(sin6, inp->in6p_outputopts,
359 inp, NULL, inp->inp_cred, &ifp, &in6a);
363 if (ifp && scope_ambiguous &&
364 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) {
369 * Do not update this earlier, in case we return with an error.
371 * XXX: this in6_selectsrc result might replace the bound local
372 * address with the address specified by setsockopt(IPV6_PKTINFO).
373 * Is it the intended behavior?
375 *plocal_addr6 = in6a;
378 * Don't do pcblookup call here; return interface in
380 * and exit to caller, that will do the lookup.
388 * Connect from a socket to a specified address.
389 * Both address and port must be specified in argument sin.
390 * If don't have a local address for this socket yet,
394 in6_pcbconnect_mbuf(register struct inpcb *inp, struct sockaddr *nam,
395 struct ucred *cred, struct mbuf *m)
397 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
398 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
399 struct in6_addr addr6;
402 INP_WLOCK_ASSERT(inp);
403 INP_HASH_WLOCK_ASSERT(pcbinfo);
406 * Call inner routine, to assign local interface address.
407 * in6_pcbladdr() may automatically fill in sin6_scope_id.
409 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
412 if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr,
414 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
415 ? &addr6 : &inp->in6p_laddr,
416 inp->inp_lport, 0, NULL) != NULL) {
419 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
420 if (inp->inp_lport == 0) {
421 error = in6_pcbbind(inp, (struct sockaddr *)0, cred);
425 inp->in6p_laddr = addr6;
427 inp->in6p_faddr = sin6->sin6_addr;
428 inp->inp_fport = sin6->sin6_port;
429 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
430 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
431 if (inp->inp_flags & IN6P_AUTOFLOWLABEL)
433 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
435 in_pcbrehash_mbuf(inp, m);
441 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
444 return (in6_pcbconnect_mbuf(inp, nam, cred, NULL));
448 in6_pcbdisconnect(struct inpcb *inp)
451 INP_WLOCK_ASSERT(inp);
452 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
454 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
456 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
457 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
462 in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
464 struct sockaddr_in6 *sin6;
466 sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK);
467 bzero(sin6, sizeof *sin6);
468 sin6->sin6_family = AF_INET6;
469 sin6->sin6_len = sizeof(*sin6);
470 sin6->sin6_port = port;
471 sin6->sin6_addr = *addr_p;
472 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
474 return (struct sockaddr *)sin6;
478 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p)
480 struct sockaddr_in sin;
481 struct sockaddr_in6 *sin6_p;
483 bzero(&sin, sizeof sin);
484 sin.sin_family = AF_INET;
485 sin.sin_len = sizeof(sin);
487 sin.sin_addr = *addr_p;
489 sin6_p = malloc(sizeof *sin6_p, M_SONAME,
491 in6_sin_2_v4mapsin6(&sin, sin6_p);
493 return (struct sockaddr *)sin6_p;
497 in6_getsockaddr(struct socket *so, struct sockaddr **nam)
499 register struct inpcb *inp;
500 struct in6_addr addr;
504 KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL"));
507 port = inp->inp_lport;
508 addr = inp->in6p_laddr;
511 *nam = in6_sockaddr(port, &addr);
516 in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
519 struct in6_addr addr;
523 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL"));
526 port = inp->inp_fport;
527 addr = inp->in6p_faddr;
530 *nam = in6_sockaddr(port, &addr);
535 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
541 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL"));
544 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
545 error = in_getsockaddr(so, nam);
547 in6_sin_2_v4mapsin6_in_sock(nam);
551 /* scope issues will be handled in in6_getsockaddr(). */
552 error = in6_getsockaddr(so, nam);
559 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
565 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL"));
568 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
569 error = in_getpeeraddr(so, nam);
571 in6_sin_2_v4mapsin6_in_sock(nam);
574 /* scope issues will be handled in in6_getpeeraddr(). */
575 error = in6_getpeeraddr(so, nam);
581 * Pass some notification to all connections of a protocol
582 * associated with address dst. The local address and/or port numbers
583 * may be specified to limit the search. The "usual action" will be
584 * taken, depending on the ctlinput cmd. The caller must filter any
585 * cmds that are uninteresting (e.g., no error in the map).
586 * Call the protocol specific routine (if any) to report
587 * any errors for each matching socket.
590 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst,
591 u_int fport_arg, const struct sockaddr *src, u_int lport_arg,
592 int cmd, void *cmdarg,
593 struct inpcb *(*notify)(struct inpcb *, int))
595 struct inpcb *inp, *inp_temp;
596 struct sockaddr_in6 sa6_src, *sa6_dst;
597 u_short fport = fport_arg, lport = lport_arg;
601 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
604 sa6_dst = (struct sockaddr_in6 *)dst;
605 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
609 * note that src can be NULL when we get notify by local fragmentation.
611 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
612 flowinfo = sa6_src.sin6_flowinfo;
615 * Redirects go to all references to the destination,
616 * and use in6_rtchange to invalidate the route cache.
617 * Dead host indications: also use in6_rtchange to invalidate
618 * the cache, and deliver the error to all the sockets.
619 * Otherwise, if we have knowledge of the local port and address,
620 * deliver only to that socket.
622 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
625 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
627 if (cmd != PRC_HOSTDEAD)
628 notify = in6_rtchange;
630 errno = inet6ctlerrmap[cmd];
631 INP_INFO_WLOCK(pcbinfo);
632 LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
634 if ((inp->inp_vflag & INP_IPV6) == 0) {
640 * If the error designates a new path MTU for a destination
641 * and the application (associated with this socket) wanted to
642 * know the value, notify. Note that we notify for all
643 * disconnected sockets if the corresponding application
644 * wanted. This is because some UDP applications keep sending
645 * sockets disconnected.
646 * XXX: should we avoid to notify the value to TCP sockets?
648 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 &&
649 (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
650 IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) {
651 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst,
652 (u_int32_t *)cmdarg);
656 * Detect if we should notify the error. If no source and
657 * destination ports are specifed, but non-zero flowinfo and
658 * local address match, notify the error. This is the case
659 * when the error is delivered with an encrypted buffer
660 * by ESP. Otherwise, just compare addresses and ports
663 if (lport == 0 && fport == 0 && flowinfo &&
664 inp->inp_socket != NULL &&
665 flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) &&
666 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
668 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
669 &sa6_dst->sin6_addr) ||
670 inp->inp_socket == 0 ||
671 (lport && inp->inp_lport != lport) ||
672 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
673 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
674 &sa6_src.sin6_addr)) ||
675 (fport && inp->inp_fport != fport)) {
682 if ((*notify)(inp, errno))
687 INP_INFO_WUNLOCK(pcbinfo);
691 * Lookup a PCB based on the local address and port. Caller must hold the
692 * hash lock. No inpcb locks or references are acquired.
695 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
696 u_short lport, int lookupflags, struct ucred *cred)
698 register struct inpcb *inp;
699 int matchwild = 3, wildcard;
701 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
702 ("%s: invalid lookup flags %d", __func__, lookupflags));
704 INP_HASH_WLOCK_ASSERT(pcbinfo);
706 if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
707 struct inpcbhead *head;
709 * Look for an unconnected (wildcard foreign addr) PCB that
710 * matches the local address and port we're looking for.
712 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
713 0, pcbinfo->ipi_hashmask)];
714 LIST_FOREACH(inp, head, inp_hash) {
715 /* XXX inp locking */
716 if ((inp->inp_vflag & INP_IPV6) == 0)
718 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
719 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
720 inp->inp_lport == lport) {
723 prison_equal_ip6(cred->cr_prison,
724 inp->inp_cred->cr_prison))
733 struct inpcbporthead *porthash;
734 struct inpcbport *phd;
735 struct inpcb *match = NULL;
737 * Best fit PCB lookup.
739 * First see if this local port is in use by looking on the
742 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
743 pcbinfo->ipi_porthashmask)];
744 LIST_FOREACH(phd, porthash, phd_hash) {
745 if (phd->phd_port == lport)
750 * Port is in use by one or more PCBs. Look for best
753 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
756 !prison_equal_ip6(cred->cr_prison,
757 inp->inp_cred->cr_prison))
759 /* XXX inp locking */
760 if ((inp->inp_vflag & INP_IPV6) == 0)
762 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
764 if (!IN6_IS_ADDR_UNSPECIFIED(
766 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
768 else if (!IN6_ARE_ADDR_EQUAL(
769 &inp->in6p_laddr, laddr))
772 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
775 if (wildcard < matchwild) {
777 matchwild = wildcard;
788 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
791 struct ip6_moptions *im6o;
794 INP_INFO_RLOCK(pcbinfo);
795 LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) {
797 im6o = in6p->in6p_moptions;
798 if ((in6p->inp_vflag & INP_IPV6) && im6o != NULL) {
800 * Unselect the outgoing ifp for multicast if it
803 if (im6o->im6o_multicast_ifp == ifp)
804 im6o->im6o_multicast_ifp = NULL;
806 * Drop multicast group membership if we joined
807 * through the interface being detached.
810 for (i = 0; i < im6o->im6o_num_memberships; i++) {
811 if (im6o->im6o_membership[i]->in6m_ifp ==
813 in6_mc_leave(im6o->im6o_membership[i],
816 } else if (gap != 0) {
817 im6o->im6o_membership[i - gap] =
818 im6o->im6o_membership[i];
821 im6o->im6o_num_memberships -= gap;
825 INP_INFO_RUNLOCK(pcbinfo);
829 * Check for alternatives when higher level complains
830 * about service problems. For now, invalidate cached
831 * routing information. If the route was created dynamically
832 * (by a redirect), time to try a default gateway again.
835 in6_losing(struct inpcb *in6p)
839 * We don't store route pointers in the routing table anymore
845 * After a routing change, flush old routing
846 * and allocate a (hopefully) better one.
849 in6_rtchange(struct inpcb *inp, int errno)
852 * We don't store route pointers in the routing table anymore
859 * Lookup PCB in hash list, using pcbgroup tables.
861 static struct inpcb *
862 in6_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup,
863 struct in6_addr *faddr, u_int fport_arg, struct in6_addr *laddr,
864 u_int lport_arg, int lookupflags, struct ifnet *ifp)
866 struct inpcbhead *head;
867 struct inpcb *inp, *tmpinp;
868 u_short fport = fport_arg, lport = lport_arg;
871 if (faithprefix_p != NULL)
872 faith = (*faithprefix_p)(laddr);
877 * First look for an exact match.
880 INP_GROUP_LOCK(pcbgroup);
881 head = &pcbgroup->ipg_hashbase[
882 INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport,
883 pcbgroup->ipg_hashmask)];
884 LIST_FOREACH(inp, head, inp_pcbgrouphash) {
885 /* XXX inp locking */
886 if ((inp->inp_vflag & INP_IPV6) == 0)
888 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
889 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
890 inp->inp_fport == fport &&
891 inp->inp_lport == lport) {
893 * XXX We should be able to directly return
894 * the inp here, without any checks.
895 * Well unless both bound with SO_REUSEPORT?
897 if (prison_flag(inp->inp_cred, PR_IP6))
903 if (tmpinp != NULL) {
909 * Then look for a wildcard match in the pcbgroup.
911 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
912 struct inpcb *local_wild = NULL, *local_exact = NULL;
913 struct inpcb *jail_wild = NULL;
917 * Order of socket selection - we always prefer jails.
918 * 1. jailed, non-wild.
920 * 3. non-jailed, non-wild.
921 * 4. non-jailed, wild.
923 head = &pcbgroup->ipg_hashbase[
924 INP_PCBHASH(INADDR_ANY, lport, 0, pcbgroup->ipg_hashmask)];
925 LIST_FOREACH(inp, head, inp_pcbgrouphash) {
926 /* XXX inp locking */
927 if ((inp->inp_vflag & INP_IPV6) == 0)
930 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
931 inp->inp_lport != lport) {
935 /* XXX inp locking */
936 if (faith && (inp->inp_flags & INP_FAITH) == 0)
939 injail = prison_flag(inp->inp_cred, PR_IP6);
941 if (prison_check_ip6(inp->inp_cred,
945 if (local_exact != NULL)
949 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
954 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
974 * Then look for a wildcard match, if requested.
976 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
977 struct inpcb *local_wild = NULL, *local_exact = NULL;
978 struct inpcb *jail_wild = NULL;
982 * Order of socket selection - we always prefer jails.
983 * 1. jailed, non-wild.
985 * 3. non-jailed, non-wild.
986 * 4. non-jailed, wild.
988 head = &pcbinfo->ipi_wildbase[INP_PCBHASH(INADDR_ANY, lport,
989 0, pcbinfo->ipi_wildmask)];
990 LIST_FOREACH(inp, head, inp_pcbgroup_wild) {
991 /* XXX inp locking */
992 if ((inp->inp_vflag & INP_IPV6) == 0)
995 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
996 inp->inp_lport != lport) {
1000 /* XXX inp locking */
1001 if (faith && (inp->inp_flags & INP_FAITH) == 0)
1004 injail = prison_flag(inp->inp_cred, PR_IP6);
1006 if (prison_check_ip6(inp->inp_cred,
1010 if (local_exact != NULL)
1014 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
1019 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1025 } /* LIST_FOREACH */
1036 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1037 INP_GROUP_UNLOCK(pcbgroup);
1042 INP_GROUP_UNLOCK(pcbgroup);
1043 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1045 if (in_pcbrele_wlocked(inp))
1047 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1049 if (in_pcbrele_rlocked(inp))
1052 panic("%s: locking buf", __func__);
1055 #endif /* PCBGROUP */
1058 * Lookup PCB in hash list.
1061 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1062 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
1063 int lookupflags, struct ifnet *ifp)
1065 struct inpcbhead *head;
1066 struct inpcb *inp, *tmpinp;
1067 u_short fport = fport_arg, lport = lport_arg;
1070 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
1071 ("%s: invalid lookup flags %d", __func__, lookupflags));
1073 INP_HASH_LOCK_ASSERT(pcbinfo);
1075 if (faithprefix_p != NULL)
1076 faith = (*faithprefix_p)(laddr);
1081 * First look for an exact match.
1084 head = &pcbinfo->ipi_hashbase[
1085 INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport,
1086 pcbinfo->ipi_hashmask)];
1087 LIST_FOREACH(inp, head, inp_hash) {
1088 /* XXX inp locking */
1089 if ((inp->inp_vflag & INP_IPV6) == 0)
1091 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1092 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1093 inp->inp_fport == fport &&
1094 inp->inp_lport == lport) {
1096 * XXX We should be able to directly return
1097 * the inp here, without any checks.
1098 * Well unless both bound with SO_REUSEPORT?
1100 if (prison_flag(inp->inp_cred, PR_IP6))
1110 * Then look for a wildcard match, if requested.
1112 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1113 struct inpcb *local_wild = NULL, *local_exact = NULL;
1114 struct inpcb *jail_wild = NULL;
1118 * Order of socket selection - we always prefer jails.
1119 * 1. jailed, non-wild.
1121 * 3. non-jailed, non-wild.
1122 * 4. non-jailed, wild.
1124 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
1125 0, pcbinfo->ipi_hashmask)];
1126 LIST_FOREACH(inp, head, inp_hash) {
1127 /* XXX inp locking */
1128 if ((inp->inp_vflag & INP_IPV6) == 0)
1131 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
1132 inp->inp_lport != lport) {
1136 /* XXX inp locking */
1137 if (faith && (inp->inp_flags & INP_FAITH) == 0)
1140 injail = prison_flag(inp->inp_cred, PR_IP6);
1142 if (prison_check_ip6(inp->inp_cred,
1146 if (local_exact != NULL)
1150 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
1155 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1161 } /* LIST_FOREACH */
1163 if (jail_wild != NULL)
1165 if (local_exact != NULL)
1166 return (local_exact);
1167 if (local_wild != NULL)
1168 return (local_wild);
1169 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1178 * Lookup PCB in hash list, using pcbinfo tables. This variation locks the
1179 * hash list lock, and will return the inpcb locked (i.e., requires
1180 * INPLOOKUP_LOCKPCB).
1182 static struct inpcb *
1183 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1184 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1189 INP_HASH_RLOCK(pcbinfo);
1190 inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport,
1191 (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp);
1194 INP_HASH_RUNLOCK(pcbinfo);
1195 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1197 if (in_pcbrele_wlocked(inp))
1199 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1201 if (in_pcbrele_rlocked(inp))
1204 panic("%s: locking bug", __func__);
1206 INP_HASH_RUNLOCK(pcbinfo);
1211 * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf
1212 * from which a pre-calculated hash value may be extracted.
1214 * Possibly more of this logic should be in in6_pcbgroup.c.
1217 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport,
1218 struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp)
1220 #if defined(PCBGROUP) && !defined(RSS)
1221 struct inpcbgroup *pcbgroup;
1224 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1225 ("%s: invalid lookup flags %d", __func__, lookupflags));
1226 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1227 ("%s: LOCKPCB not set", __func__));
1230 * When not using RSS, use connection groups in preference to the
1231 * reservation table when looking up 4-tuples. When using RSS, just
1232 * use the reservation table, due to the cost of the Toeplitz hash
1235 * XXXRW: This policy belongs in the pcbgroup code, as in principle
1236 * we could be doing RSS with a non-Toeplitz hash that is affordable
1239 #if defined(PCBGROUP) && !defined(RSS)
1240 if (in_pcbgroup_enabled(pcbinfo)) {
1241 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1243 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1244 laddr, lport, lookupflags, ifp));
1247 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1252 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1253 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1254 struct ifnet *ifp, struct mbuf *m)
1257 struct inpcbgroup *pcbgroup;
1260 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1261 ("%s: invalid lookup flags %d", __func__, lookupflags));
1262 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1263 ("%s: LOCKPCB not set", __func__));
1267 * If we can use a hardware-generated hash to look up the connection
1268 * group, use that connection group to find the inpcb. Otherwise
1269 * fall back on a software hash -- or the reservation table if we're
1272 * XXXRW: As above, that policy belongs in the pcbgroup code.
1274 if (in_pcbgroup_enabled(pcbinfo) &&
1275 !(M_HASHTYPE_TEST(m, M_HASHTYPE_NONE))) {
1276 pcbgroup = in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m),
1277 m->m_pkthdr.flowid);
1278 if (pcbgroup != NULL)
1279 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr,
1280 fport, laddr, lport, lookupflags, ifp));
1282 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1284 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1285 laddr, lport, lookupflags, ifp));
1289 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1294 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1298 ip = mtod(m, struct ip6_hdr *);
1299 bzero(sin6, sizeof(*sin6));
1300 sin6->sin6_len = sizeof(*sin6);
1301 sin6->sin6_family = AF_INET6;
1302 sin6->sin6_addr = ip->ip6_src;
1304 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */