1 /* $FreeBSD: src/sys/netinet6/in6_pcb.c,v 1.10.2.9 2003/01/24 05:11:35 sam Exp $ */
2 /* $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $ */
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * Copyright (c) 1982, 1986, 1991, 1993
36 * The Regents of the University of California. All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. Neither the name of the University nor the names of its contributors
47 * may be used to endorse or promote products derived from this software
48 * without specific prior written permission.
50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94
66 #include "opt_inet6.h"
68 #include <sys/param.h>
69 #include <sys/systm.h>
70 #include <sys/malloc.h>
72 #include <sys/domain.h>
73 #include <sys/protosw.h>
74 #include <sys/socket.h>
75 #include <sys/socketvar.h>
76 #include <sys/sockio.h>
77 #include <sys/errno.h>
83 #include <sys/thread2.h>
84 #include <sys/msgport2.h>
86 #include <vm/vm_zone.h>
89 #include <net/if_types.h>
90 #include <net/route.h>
91 #include <net/netisr2.h>
93 #include <netinet/in.h>
94 #include <netinet/in_var.h>
95 #include <netinet/in_systm.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>
103 struct in6_addr zeroin6_addr;
106 in6_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
108 struct socket *so = inp->inp_socket;
109 struct sockaddr_in6 jsin6;
112 if (!in6_ifaddr) /* XXX broken! */
113 return (EADDRNOTAVAIL);
114 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
118 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
119 struct inpcbinfo *pcbinfo;
120 struct inpcbportinfo *portinfo;
121 struct inpcbporthead *porthash;
122 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
123 struct ucred *cred = NULL;
125 u_short lport, lport_ho;
127 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
129 if (td->td_proc != NULL)
130 cred = td->td_proc->p_ucred;
132 if (nam->sa_len != sizeof(*sin6))
137 if (nam->sa_family != AF_INET6)
138 return (EAFNOSUPPORT);
140 /* Reject v4-mapped address */
141 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
142 return (EADDRNOTAVAIL);
144 if (!prison_replace_wildcards(td, nam))
147 /* KAME hack: embed scopeid */
148 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0)
150 /* this must be cleared for ifa_ifwithaddr() */
151 sin6->sin6_scope_id = 0;
153 lport = sin6->sin6_port;
154 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
156 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
157 * allow compepte duplication of binding if
158 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
159 * and a multicast address is bound on both
160 * new and duplicated sockets.
162 if (so->so_options & SO_REUSEADDR)
163 reuseport = SO_REUSEADDR|SO_REUSEPORT;
164 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
165 struct ifaddr *ia = NULL;
167 sin6->sin6_port = 0; /* yech... */
168 if (!prison_replace_wildcards(td, (struct sockaddr *)sin6)) {
169 sin6->sin6_addr = kin6addr_any;
172 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == NULL)
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 dares to use it.
182 ((struct in6_ifaddr *)ia)->ia6_flags &
183 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED))
184 return (EADDRNOTAVAIL);
187 inp->in6p_laddr = sin6->sin6_addr;
191 lport_ho = ntohs(lport);
194 if (lport_ho < IPV6PORT_RESERVED && cred &&
195 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0)) {
196 inp->in6p_laddr = kin6addr_any;
201 * Locate the proper portinfo based on lport
203 pcbinfo = inp->inp_pcbinfo;
205 &pcbinfo->portinfo[lport_ho % pcbinfo->portinfo_cnt];
206 KKASSERT((lport_ho % pcbinfo->portinfo_cnt) ==
210 * This has to be atomic. If the porthash is shared across
211 * multiple protocol threads (aka tcp) then the token must
214 porthash = in_pcbporthash_head(portinfo, lport);
215 GET_PORTHASH_TOKEN(porthash);
217 if (so->so_cred->cr_uid != 0 &&
218 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
219 t = in6_pcblookup_local(porthash,
220 &sin6->sin6_addr, lport, INPLOOKUP_WILDCARD, cred);
222 (so->so_cred->cr_uid !=
223 t->inp_socket->so_cred->cr_uid)) {
224 inp->in6p_laddr = kin6addr_any;
229 if (cred && cred->cr_prison &&
230 !prison_replace_wildcards(td, nam)) {
231 inp->in6p_laddr = kin6addr_any;
232 error = EADDRNOTAVAIL;
235 t = in6_pcblookup_local(porthash, &sin6->sin6_addr, lport,
237 if (t && (reuseport & t->inp_socket->so_options) == 0) {
238 inp->in6p_laddr = kin6addr_any;
243 inp->inp_lport = lport;
244 in_pcbinsporthash(porthash, inp);
247 REL_PORTHASH_TOKEN(porthash);
251 jsin6.sin6_addr = inp->in6p_laddr;
252 jsin6.sin6_family = AF_INET6;
253 if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin6)) {
254 inp->in6p_laddr = kin6addr_any;
259 return in6_pcbsetlport(&inp->in6p_laddr, inp, td);
264 * Transform old in6_pcbconnect() into an inner subroutine for new
265 * in6_pcbconnect(): Do some validity-checking on the remote
266 * address (in mbuf 'nam') and then determine local host address
267 * (i.e., which interface) to use to access that remote host.
269 * This preserves definition of in6_pcbconnect(), while supporting a
270 * slightly different version for T/TCP. (This is more than
271 * a bit of a kludge, but cleaning up the internal interfaces would
272 * have forced minor changes in every protocol).
276 in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
277 struct in6_addr **plocal_addr6, struct thread *td)
279 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
280 struct ifnet *ifp = NULL;
283 if (nam->sa_len != sizeof (*sin6))
285 if (sin6->sin6_family != AF_INET6)
286 return (EAFNOSUPPORT);
287 if (sin6->sin6_port == 0)
288 return (EADDRNOTAVAIL);
290 /* KAME hack: embed scopeid */
291 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0)
296 * If the destination address is UNSPECIFIED addr,
297 * use the loopback addr, e.g ::1.
299 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
300 sin6->sin6_addr = kin6addr_loopback;
304 * XXX: in6_selectsrc might replace the bound local address
305 * with the address specified by setsockopt(IPV6_PKTINFO).
306 * Is it the intended behavior?
308 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts,
311 &inp->in6p_laddr, &error, td);
312 if (*plocal_addr6 == NULL) {
314 error = EADDRNOTAVAIL;
318 * Don't do pcblookup call here; return interface in
320 * and exit to caller, that will do the lookup.
324 if (inp->in6p_route.ro_rt)
325 ifp = inp->in6p_route.ro_rt->rt_ifp;
332 * Connect from a socket to a specified address.
333 * Both address and port must be specified in argument sin.
334 * If don't have a local address for this socket yet,
338 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
340 struct in6_addr *addr6;
341 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
344 /* Reject v4-mapped address */
345 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
346 return EADDRNOTAVAIL;
349 * Call inner routine, to assign local interface address.
350 * in6_pcbladdr() may automatically fill in sin6_scope_id.
352 if ((error = in6_pcbladdr(inp, nam, &addr6, td)) != 0)
355 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr,
357 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
358 ? addr6 : &inp->in6p_laddr,
359 inp->inp_lport, 0, NULL) != NULL) {
362 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
363 if (inp->inp_lport == 0) {
364 error = in6_pcbbind(inp, NULL, td);
368 inp->in6p_laddr = *addr6;
370 inp->in6p_faddr = sin6->sin6_addr;
371 inp->inp_fport = sin6->sin6_port;
372 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
373 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
374 if (inp->in6p_flags & IN6P_AUTOFLOWLABEL)
375 inp->in6p_flowinfo |=
376 (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK);
378 in_pcbinsconnhash(inp);
383 in6_pcbdisconnect(struct inpcb *inp)
385 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
387 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
388 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
389 in_pcbremconnhash(inp);
390 if (inp->inp_socket->so_state & SS_NOFDREF)
395 in6_pcbdetach(struct inpcb *inp)
397 struct socket *so = inp->inp_socket;
398 struct inpcbinfo *ipi = inp->inp_pcbinfo;
400 inp->inp_gencnt = ++ipi->ipi_gencnt;
403 KKASSERT((so->so_state & SS_ASSERTINPROG) == 0);
404 sofree(so); /* remove pcb ref */
406 if (inp->in6p_options)
407 m_freem(inp->in6p_options);
408 ip6_freepcbopts(inp->in6p_outputopts);
409 ip6_freemoptions(inp->in6p_moptions);
410 if (inp->in6p_route.ro_rt)
411 rtfree(inp->in6p_route.ro_rt);
412 /* Check and free IPv4 related resources in case of mapped addr */
413 if (inp->inp_options)
414 m_free(inp->inp_options);
415 ip_freemoptions(inp->inp_moptions);
421 * The socket may have an invalid PCB, i.e. NULL. For example, a TCP
422 * socket received RST.
425 in6_setsockaddr(struct socket *so, struct sockaddr **nam)
428 struct sockaddr_in6 *sin6;
430 KASSERT(curthread->td_type == TD_TYPE_NETISR, ("not in netisr"));
435 sin6 = kmalloc(sizeof *sin6, M_SONAME, M_WAITOK | M_ZERO);
436 sin6->sin6_family = AF_INET6;
437 sin6->sin6_len = sizeof(*sin6);
438 sin6->sin6_port = inp->inp_lport;
439 sin6->sin6_addr = inp->in6p_laddr;
440 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
441 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
443 sin6->sin6_scope_id = 0; /*XXX*/
444 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
445 sin6->sin6_addr.s6_addr16[1] = 0;
447 *nam = (struct sockaddr *)sin6;
452 in6_setsockaddr_dispatch(netmsg_t msg)
456 error = in6_setsockaddr(msg->sockaddr.base.nm_so, msg->sockaddr.nm_nam);
457 lwkt_replymsg(&msg->sockaddr.base.lmsg, error);
461 in6_setpeeraddr_dispatch(netmsg_t msg)
465 error = in6_setpeeraddr(msg->peeraddr.base.nm_so, msg->peeraddr.nm_nam);
466 lwkt_replymsg(&msg->peeraddr.base.lmsg, error);
470 * The socket may have an invalid PCB, i.e. NULL. For example, a TCP
471 * socket received RST.
474 in6_setpeeraddr(struct socket *so, struct sockaddr **nam)
477 struct sockaddr_in6 *sin6;
479 KASSERT(curthread->td_type == TD_TYPE_NETISR, ("not in netisr"));
484 sin6 = kmalloc(sizeof(*sin6), M_SONAME, M_WAITOK | M_ZERO);
485 sin6->sin6_family = AF_INET6;
486 sin6->sin6_len = sizeof(struct sockaddr_in6);
487 sin6->sin6_port = inp->inp_fport;
488 sin6->sin6_addr = inp->in6p_faddr;
489 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
490 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
492 sin6->sin6_scope_id = 0; /*XXX*/
493 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
494 sin6->sin6_addr.s6_addr16[1] = 0;
496 *nam = (struct sockaddr *)sin6;
501 * Pass some notification to all connections of a protocol
502 * associated with address dst. The local address and/or port numbers
503 * may be specified to limit the search. The "usual action" will be
504 * taken, depending on the ctlinput cmd. The caller must filter any
505 * cmds that are uninteresting (e.g., no error in the map).
506 * Call the protocol specific routine (if any) to report
507 * any errors for each matching socket.
510 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, in_port_t fport,
511 const struct sockaddr *src, in_port_t lport, int cmd, int arg,
514 struct inpcb *inp, *marker;
515 struct sockaddr_in6 sa6_src, *sa6_dst;
518 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
521 sa6_dst = (struct sockaddr_in6 *)dst;
522 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
526 * note that src can be NULL when we get notify by local fragmentation.
528 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
529 flowinfo = sa6_src.sin6_flowinfo;
532 * Redirects go to all references to the destination,
533 * and use in6_rtchange to invalidate the route cache.
534 * Dead host indications: also use in6_rtchange to invalidate
535 * the cache, and deliver the error to all the sockets.
536 * Otherwise, if we have knowledge of the local port and address,
537 * deliver only to that socket.
539 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
542 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
544 if (cmd != PRC_HOSTDEAD)
545 notify = in6_rtchange;
547 if (cmd != PRC_MSGSIZE)
548 arg = inet6ctlerrmap[cmd];
550 marker = in_pcbmarker();
552 GET_PCBINFO_TOKEN(pcbinfo);
554 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list);
555 while ((inp = LIST_NEXT(marker, inp_list)) != NULL) {
556 LIST_REMOVE(marker, inp_list);
557 LIST_INSERT_AFTER(inp, marker, inp_list);
559 if (inp->inp_flags & INP_PLACEMARKER)
562 if (!INP_ISIPV6(inp))
565 * If the error designates a new path MTU for a destination
566 * and the application (associated with this socket) wanted to
567 * know the value, notify. Note that we notify for all
568 * disconnected sockets if the corresponding application
569 * wanted. This is because some UDP applications keep sending
570 * sockets disconnected.
571 * XXX: should we avoid to notify the value to TCP sockets?
573 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 &&
574 (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
575 IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) {
576 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, &arg);
580 * Detect if we should notify the error. If no source and
581 * destination ports are specifed, but non-zero flowinfo and
582 * local address match, notify the error. This is the case
583 * when the error is delivered with an encrypted buffer
584 * by ESP. Otherwise, just compare addresses and ports
587 if (lport == 0 && fport == 0 && flowinfo &&
588 inp->inp_socket != NULL &&
589 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
590 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
592 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
593 &sa6_dst->sin6_addr) ||
594 inp->inp_socket == 0 ||
595 (lport && inp->inp_lport != lport) ||
596 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
597 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
598 &sa6_src.sin6_addr)) ||
599 (fport && inp->inp_fport != fport))
606 LIST_REMOVE(marker, inp_list);
608 REL_PCBINFO_TOKEN(pcbinfo);
612 * Lookup a PCB based on the local address and port.
615 in6_pcblookup_local(struct inpcbporthead *porthash,
616 const struct in6_addr *laddr, u_int lport_arg, int wild_okay,
620 int matchwild = 3, wildcard;
621 u_short lport = lport_arg;
622 struct inpcbport *phd;
623 struct inpcb *match = NULL;
626 * If the porthashbase is shared across several cpus, it must
629 ASSERT_PORTHASH_TOKEN_HELD(porthash);
632 * Best fit PCB lookup.
634 * First see if this local port is in use by looking on the
637 LIST_FOREACH(phd, porthash, phd_hash) {
638 if (phd->phd_port == lport)
644 * Port is in use by one or more PCBs. Look for best
647 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
649 if (!INP_ISIPV6(inp))
651 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
653 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
654 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
656 else if (!IN6_ARE_ADDR_EQUAL(
657 &inp->in6p_laddr, laddr))
660 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
663 if (wildcard && !wild_okay)
665 if (wildcard < matchwild &&
668 inp->inp_socket->so_cred->cr_prison)) {
670 matchwild = wildcard;
674 matchwild = wildcard;
682 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
684 struct in6pcb *in6p, *marker;
685 struct ip6_moptions *im6o;
686 struct in6_multi_mship *imm, *nimm;
689 * We only need to make sure that we are in netisr0, where all
690 * multicast operation happen. We could check inpcbinfo which
691 * does not belong to netisr0 by holding the inpcbinfo's token.
692 * In this case, the pcbinfo must be able to be shared, i.e.
693 * pcbinfo->infotoken is not NULL.
696 KASSERT(pcbinfo->cpu == 0 || pcbinfo->infotoken != NULL,
697 ("pcbinfo could not be shared"));
700 * Get a marker for the current netisr (netisr0).
702 * It is possible that the multicast address deletion blocks,
703 * which could cause temporary token releasing. So we use
704 * inpcb marker here to get a coherent view of the inpcb list.
706 * While, on the other hand, moptions are only added and deleted
707 * in netisr0, so we would not see staled moption or miss moption
708 * even if the token was released due to the blocking multicast
711 marker = in_pcbmarker();
713 GET_PCBINFO_TOKEN(pcbinfo);
715 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list);
716 while ((in6p = LIST_NEXT(marker, inp_list)) != NULL) {
717 LIST_REMOVE(marker, inp_list);
718 LIST_INSERT_AFTER(in6p, marker, inp_list);
720 if (in6p->in6p_flags & INP_PLACEMARKER)
722 im6o = in6p->in6p_moptions;
723 if (INP_ISIPV6(in6p) && im6o) {
725 * Unselect the outgoing interface if it is being
728 if (im6o->im6o_multicast_ifp == ifp)
729 im6o->im6o_multicast_ifp = NULL;
732 * Drop multicast group membership if we joined
733 * through the interface being detached.
734 * XXX controversial - is it really legal for kernel
737 for (imm = im6o->im6o_memberships.lh_first;
738 imm != NULL; imm = nimm) {
739 nimm = imm->i6mm_chain.le_next;
740 if (imm->i6mm_maddr->in6m_ifp == ifp) {
741 LIST_REMOVE(imm, i6mm_chain);
742 in6_delmulti(imm->i6mm_maddr);
743 kfree(imm, M_IPMADDR);
748 LIST_REMOVE(marker, inp_list);
750 REL_PCBINFO_TOKEN(pcbinfo);
754 * Check for alternatives when higher level complains
755 * about service problems. For now, invalidate cached
756 * routing information. If the route was created dynamically
757 * (by a redirect), time to try a default gateway again.
760 in6_losing(struct inpcb *in6p)
763 struct rt_addrinfo info;
765 if ((rt = in6p->in6p_route.ro_rt) != NULL) {
766 bzero((caddr_t)&info, sizeof(info));
767 info.rti_flags = rt->rt_flags;
768 info.rti_info[RTAX_DST] = rt_key(rt);
769 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
770 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
771 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
772 if (rt->rt_flags & RTF_DYNAMIC) {
773 rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
774 rt_mask(rt), rt->rt_flags, NULL);
776 in6p->in6p_route.ro_rt = NULL;
779 * A new route can be allocated
780 * the next time output is attempted.
786 * After a routing change, flush old routing
787 * and allocate a (hopefully) better one.
790 in6_rtchange(struct inpcb *inp, int error)
792 if (inp->in6p_route.ro_rt) {
793 rtfree(inp->in6p_route.ro_rt);
794 inp->in6p_route.ro_rt = 0;
796 * A new route can be allocated the next time
797 * output is attempted.
803 * Lookup PCB in hash list.
806 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
807 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
808 int wildcard, struct ifnet *ifp)
810 struct inpcbhead *head;
812 struct inpcb *jinp = NULL;
813 u_short fport = fport_arg, lport = lport_arg;
816 * First look for an exact match.
818 head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr->s6_addr32[3] /* XXX */,
820 laddr->s6_addr32[3], /* XXX JH */
823 LIST_FOREACH(inp, head, inp_hash) {
824 if (!INP_ISIPV6(inp))
826 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
827 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
828 inp->inp_fport == fport &&
829 inp->inp_lport == lport) {
833 if (inp->inp_socket == NULL ||
834 inp->inp_socket->so_cred->cr_prison == NULL) {
846 struct inpcontainerhead *chead;
847 struct inpcontainer *ic;
848 struct inpcb *local_wild = NULL;
849 struct inpcb *jinp_wild = NULL;
850 struct sockaddr_in6 jsin6;
854 * Order of socket selection:
855 * 1. non-jailed, non-wild.
856 * 2. non-jailed, wild.
857 * 3. jailed, non-wild.
860 jsin6.sin6_family = AF_INET6;
861 chead = &pcbinfo->wildcardhashbase[INP_PCBWILDCARDHASH(lport,
862 pcbinfo->wildcardhashmask)];
864 GET_PCBINFO_TOKEN(pcbinfo);
865 LIST_FOREACH(ic, chead, ic_list) {
867 if (inp->inp_flags & INP_PLACEMARKER)
870 if (!INP_ISIPV6(inp))
872 if (inp->inp_socket != NULL)
873 cred = inp->inp_socket->so_cred;
877 if (cred != NULL && jailed(cred)) {
881 jsin6.sin6_addr = *laddr;
882 if (!jailed_ip(cred->cr_prison,
883 (struct sockaddr *)&jsin6))
887 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
888 inp->inp_lport == lport) {
889 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
891 if (cred != NULL && jailed(cred)) {
894 REL_PCBINFO_TOKEN(pcbinfo);
897 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
898 if (cred != NULL && jailed(cred))
905 REL_PCBINFO_TOKEN(pcbinfo);
907 if (local_wild != NULL)
921 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
925 ip = mtod(m, struct ip6_hdr *);
926 bzero(sin6, sizeof(*sin6));
927 sin6->sin6_len = sizeof(*sin6);
928 sin6->sin6_family = AF_INET6;
929 sin6->sin6_addr = ip->ip6_src;
930 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
931 sin6->sin6_addr.s6_addr16[1] = 0;
932 sin6->sin6_scope_id =
933 (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
934 ? m->m_pkthdr.rcvif->if_index : 0;
940 in6_savefaddr(struct socket *so, const struct sockaddr *faddr)
942 struct sockaddr_in6 *sin6;
944 KASSERT(faddr->sa_family == AF_INET6,
945 ("not AF_INET6 faddr %d", faddr->sa_family));
947 sin6 = kmalloc(sizeof(*sin6), M_SONAME, M_WAITOK | M_ZERO);
948 sin6->sin6_family = AF_INET6;
949 sin6->sin6_len = sizeof(*sin6);
951 sin6->sin6_port = ((const struct sockaddr_in6 *)faddr)->sin6_port;
952 sin6->sin6_addr = ((const struct sockaddr_in6 *)faddr)->sin6_addr;
954 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
955 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
957 sin6->sin6_scope_id = 0; /*XXX*/
958 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
959 sin6->sin6_addr.s6_addr16[1] = 0;
961 so->so_faddr = (struct sockaddr *)sin6;