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.
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62 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94
66 #include "opt_inet6.h"
67 #include "opt_ipsec.h"
69 #include <sys/param.h>
70 #include <sys/systm.h>
71 #include <sys/malloc.h>
73 #include <sys/domain.h>
74 #include <sys/protosw.h>
75 #include <sys/socket.h>
76 #include <sys/socketvar.h>
77 #include <sys/sockio.h>
78 #include <sys/errno.h>
84 #include <sys/thread2.h>
85 #include <sys/msgport2.h>
87 #include <vm/vm_zone.h>
90 #include <net/if_types.h>
91 #include <net/route.h>
92 #include <net/netisr2.h>
94 #include <netinet/in.h>
95 #include <netinet/in_var.h>
96 #include <netinet/in_systm.h>
97 #include <netinet/ip6.h>
98 #include <netinet/ip_var.h>
99 #include <netinet6/ip6_var.h>
100 #include <netinet6/nd6.h>
101 #include <netinet/in_pcb.h>
102 #include <netinet6/in6_pcb.h>
105 #include <netinet6/ipsec.h>
107 #include <netinet6/ipsec6.h>
109 #include <netinet6/ah.h>
111 #include <netinet6/ah6.h>
113 #include <netproto/key/key.h>
117 #include <netproto/ipsec/ipsec.h>
118 #include <netproto/ipsec/ipsec6.h>
119 #include <netproto/ipsec/key.h>
121 #endif /* FAST_IPSEC */
123 struct in6_addr zeroin6_addr;
126 in6_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
128 struct socket *so = inp->inp_socket;
129 struct sockaddr_in6 jsin6;
132 if (!in6_ifaddr) /* XXX broken! */
133 return (EADDRNOTAVAIL);
134 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
138 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
139 struct inpcbinfo *pcbinfo;
140 struct inpcbportinfo *portinfo;
141 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
142 struct ucred *cred = NULL;
144 u_short lport, lport_ho;
146 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
148 if (td->td_proc != NULL)
149 cred = td->td_proc->p_ucred;
151 if (nam->sa_len != sizeof(*sin6))
156 if (nam->sa_family != AF_INET6)
157 return (EAFNOSUPPORT);
159 /* Reject v4-mapped address */
160 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
161 return (EADDRNOTAVAIL);
163 if (!prison_replace_wildcards(td, nam))
166 /* KAME hack: embed scopeid */
167 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0)
169 /* this must be cleared for ifa_ifwithaddr() */
170 sin6->sin6_scope_id = 0;
172 lport = sin6->sin6_port;
173 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
175 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
176 * allow compepte duplication of binding if
177 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
178 * and a multicast address is bound on both
179 * new and duplicated sockets.
181 if (so->so_options & SO_REUSEADDR)
182 reuseport = SO_REUSEADDR|SO_REUSEPORT;
183 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
184 struct ifaddr *ia = NULL;
186 sin6->sin6_port = 0; /* yech... */
187 if (!prison_replace_wildcards(td, (struct sockaddr *)sin6)) {
188 sin6->sin6_addr = kin6addr_any;
191 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == NULL)
192 return (EADDRNOTAVAIL);
195 * XXX: bind to an anycast address might accidentally
196 * cause sending a packet with anycast source address.
197 * We should allow to bind to a deprecated address, since
198 * the application dare to use it.
201 ((struct in6_ifaddr *)ia)->ia6_flags &
202 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED))
203 return (EADDRNOTAVAIL);
206 inp->in6p_laddr = sin6->sin6_addr;
210 lport_ho = ntohs(lport);
213 if (lport_ho < IPV6PORT_RESERVED && cred &&
214 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0)) {
215 inp->in6p_laddr = kin6addr_any;
220 * Locate the proper portinfo based on lport
222 pcbinfo = inp->inp_pcbinfo;
224 &pcbinfo->portinfo[lport_ho & pcbinfo->portinfo_mask];
225 KKASSERT((lport_ho & pcbinfo->portinfo_mask) ==
229 * This has to be atomic. If the porthash is shared across
230 * multiple protocol threads (aka tcp) then the token must
233 GET_PORT_TOKEN(portinfo);
235 if (so->so_cred->cr_uid != 0 &&
236 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
237 t = in6_pcblookup_local(portinfo,
238 &sin6->sin6_addr, lport, INPLOOKUP_WILDCARD, cred);
240 (so->so_cred->cr_uid !=
241 t->inp_socket->so_cred->cr_uid)) {
242 inp->in6p_laddr = kin6addr_any;
247 if (cred && cred->cr_prison &&
248 !prison_replace_wildcards(td, nam)) {
249 inp->in6p_laddr = kin6addr_any;
250 error = EADDRNOTAVAIL;
253 t = in6_pcblookup_local(portinfo, &sin6->sin6_addr, lport,
255 if (t && (reuseport & t->inp_socket->so_options) == 0) {
256 inp->in6p_laddr = kin6addr_any;
261 inp->inp_lport = lport;
262 in_pcbinsporthash(portinfo, inp);
265 REL_PORT_TOKEN(portinfo);
269 jsin6.sin6_addr = inp->in6p_laddr;
270 jsin6.sin6_family = AF_INET6;
271 if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin6)) {
272 inp->in6p_laddr = kin6addr_any;
277 return in6_pcbsetlport(&inp->in6p_laddr, inp, td);
282 * Transform old in6_pcbconnect() into an inner subroutine for new
283 * in6_pcbconnect(): Do some validity-checking on the remote
284 * address (in mbuf 'nam') and then determine local host address
285 * (i.e., which interface) to use to access that remote host.
287 * This preserves definition of in6_pcbconnect(), while supporting a
288 * slightly different version for T/TCP. (This is more than
289 * a bit of a kludge, but cleaning up the internal interfaces would
290 * have forced minor changes in every protocol).
294 in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
295 struct in6_addr **plocal_addr6, struct thread *td)
297 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
298 struct ifnet *ifp = NULL;
301 if (nam->sa_len != sizeof (*sin6))
303 if (sin6->sin6_family != AF_INET6)
304 return (EAFNOSUPPORT);
305 if (sin6->sin6_port == 0)
306 return (EADDRNOTAVAIL);
308 /* KAME hack: embed scopeid */
309 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0)
314 * If the destination address is UNSPECIFIED addr,
315 * use the loopback addr, e.g ::1.
317 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
318 sin6->sin6_addr = kin6addr_loopback;
322 * XXX: in6_selectsrc might replace the bound local address
323 * with the address specified by setsockopt(IPV6_PKTINFO).
324 * Is it the intended behavior?
326 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts,
329 &inp->in6p_laddr, &error, td);
330 if (*plocal_addr6 == NULL) {
332 error = EADDRNOTAVAIL;
336 * Don't do pcblookup call here; return interface in
338 * and exit to caller, that will do the lookup.
342 if (inp->in6p_route.ro_rt)
343 ifp = inp->in6p_route.ro_rt->rt_ifp;
350 * Connect from a socket to a specified address.
351 * Both address and port must be specified in argument sin.
352 * If don't have a local address for this socket yet,
356 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
358 struct in6_addr *addr6;
359 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
362 /* Reject v4-mapped address */
363 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
364 return EADDRNOTAVAIL;
367 * Call inner routine, to assign local interface address.
368 * in6_pcbladdr() may automatically fill in sin6_scope_id.
370 if ((error = in6_pcbladdr(inp, nam, &addr6, td)) != 0)
373 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr,
375 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
376 ? addr6 : &inp->in6p_laddr,
377 inp->inp_lport, 0, NULL) != NULL) {
380 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
381 if (inp->inp_lport == 0) {
382 error = in6_pcbbind(inp, NULL, td);
386 inp->in6p_laddr = *addr6;
388 inp->in6p_faddr = sin6->sin6_addr;
389 inp->inp_fport = sin6->sin6_port;
390 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
391 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
392 if (inp->in6p_flags & IN6P_AUTOFLOWLABEL)
393 inp->in6p_flowinfo |=
394 (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK);
396 in_pcbinsconnhash(inp);
402 * Return an IPv6 address, which is the most appropriate for given
403 * destination and user specified options.
404 * If necessary, this function lookups the routing table and return
405 * an entry to the caller for later use.
408 in6_selectsrc(struct sockaddr_in6 *dstsock, struct ip6_pktopts *opts,
409 struct ip6_moptions *mopts, struct route_in6 *ro,
410 struct in6_addr *laddr, int *errorp, struct thread *td)
412 struct sockaddr_in6 jsin6;
413 struct ucred *cred = NULL;
414 struct in6_addr *dst;
415 struct in6_ifaddr *ia6 = 0;
416 struct in6_pktinfo *pi = NULL;
419 if (td && td->td_proc && td->td_proc->p_ucred)
420 cred = td->td_proc->p_ucred;
421 if (cred && cred->cr_prison)
423 jsin6.sin6_family = AF_INET6;
424 dst = &dstsock->sin6_addr;
428 * If the source address is explicitly specified by the caller,
431 if (opts && (pi = opts->ip6po_pktinfo) &&
432 !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr)) {
433 jsin6.sin6_addr = pi->ipi6_addr;
434 if (jailed && !jailed_ip(cred->cr_prison,
435 (struct sockaddr *)&jsin6)) {
438 return (&pi->ipi6_addr);
443 * If the source address is not specified but the socket(if any)
444 * is already bound, use the bound address.
446 if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr)) {
447 jsin6.sin6_addr = *laddr;
448 if (jailed && !jailed_ip(cred->cr_prison,
449 (struct sockaddr *)&jsin6)) {
457 * If the caller doesn't specify the source address but
458 * the outgoing interface, use an address associated with
461 if (pi && pi->ipi6_ifindex) {
462 /* XXX boundary check is assumed to be already done. */
463 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex],
467 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
468 if (!jailed_ip(cred->cr_prison,
469 (struct sockaddr *)&jsin6))
474 *errorp = EADDRNOTAVAIL;
477 return (&satosin6(&ia6->ia_addr)->sin6_addr);
481 * If the destination address is a link-local unicast address or
482 * a multicast address, and if the outgoing interface is specified
483 * by the sin6_scope_id filed, use an address associated with the
485 * XXX: We're now trying to define more specific semantics of
486 * sin6_scope_id field, so this part will be rewritten in
489 if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) &&
490 dstsock->sin6_scope_id) {
492 * I'm not sure if boundary check for scope_id is done
495 if (dstsock->sin6_scope_id < 0 ||
496 if_index < dstsock->sin6_scope_id) {
497 *errorp = ENXIO; /* XXX: better error? */
500 ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id],
504 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
505 if (!jailed_ip(cred->cr_prison,
506 (struct sockaddr *)&jsin6))
511 *errorp = EADDRNOTAVAIL;
514 return (&satosin6(&ia6->ia_addr)->sin6_addr);
518 * If the destination address is a multicast address and
519 * the outgoing interface for the address is specified
520 * by the caller, use an address associated with the interface.
521 * There is a sanity check here; if the destination has node-local
522 * scope, the outgoing interfacde should be a loopback address.
523 * Even if the outgoing interface is not specified, we also
524 * choose a loopback interface as the outgoing interface.
526 if (!jailed && IN6_IS_ADDR_MULTICAST(dst)) {
527 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL;
529 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) {
534 ia6 = in6_ifawithscope(ifp, dst, cred);
536 *errorp = EADDRNOTAVAIL;
539 return (&ia6->ia_addr.sin6_addr);
544 * If the next hop address for the packet is specified
545 * by caller, use an address associated with the route
549 struct sockaddr_in6 *sin6_next;
552 if (opts && opts->ip6po_nexthop) {
553 sin6_next = satosin6(opts->ip6po_nexthop);
554 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL);
556 ia6 = in6_ifawithscope(rt->rt_ifp, dst, cred);
558 ia6 = ifatoia6(rt->rt_ifa);
561 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
562 if (!jailed_ip(cred->cr_prison,
563 (struct sockaddr *)&jsin6))
568 *errorp = EADDRNOTAVAIL;
571 return (&satosin6(&ia6->ia_addr)->sin6_addr);
576 * If route is known or can be allocated now,
577 * our src addr is taken from the i/f, else punt.
581 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) {
585 if (ro->ro_rt == NULL || ro->ro_rt->rt_ifp == NULL) {
586 struct sockaddr_in6 *dst6;
588 /* No route yet, so try to acquire one */
589 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6));
591 dst6->sin6_family = AF_INET6;
592 dst6->sin6_len = sizeof(struct sockaddr_in6);
593 dst6->sin6_addr = *dst;
594 if (!jailed && IN6_IS_ADDR_MULTICAST(dst)) {
596 rtpurelookup((struct sockaddr *)&ro->ro_dst);
598 rtalloc((struct route *)ro);
603 * in_pcbconnect() checks out IFF_LOOPBACK to skip using
604 * the address. But we don't know why it does so.
605 * It is necessary to ensure the scope even for lo0
606 * so doesn't check out IFF_LOOPBACK.
610 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst, cred);
612 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
613 if (!jailed_ip(cred->cr_prison,
614 (struct sockaddr *)&jsin6))
618 if (ia6 == 0) /* xxx scope error ?*/
619 ia6 = ifatoia6(ro->ro_rt->rt_ifa);
622 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
623 if (!jailed_ip(cred->cr_prison,
624 (struct sockaddr *)&jsin6))
629 *errorp = EHOSTUNREACH; /* no route */
632 return (&satosin6(&ia6->ia_addr)->sin6_addr);
635 *errorp = EADDRNOTAVAIL;
640 * Default hop limit selection. The precedence is as follows:
641 * 1. Hoplimit valued specified via ioctl.
642 * 2. (If the outgoing interface is detected) the current
643 * hop limit of the interface specified by router advertisement.
644 * 3. The system default hoplimit.
647 in6_selecthlim(struct in6pcb *in6p, struct ifnet *ifp)
651 if (in6p && in6p->in6p_hops >= 0) {
652 return (in6p->in6p_hops);
654 hlim = ND_IFINFO(ifp)->chlim;
655 if (hlim < ip6_minhlim)
666 in6_pcbdisconnect(struct inpcb *inp)
668 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
670 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
671 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
672 in_pcbremconnhash(inp);
673 if (inp->inp_socket->so_state & SS_NOFDREF)
678 in6_pcbdetach(struct inpcb *inp)
680 struct socket *so = inp->inp_socket;
681 struct inpcbinfo *ipi = inp->inp_pcbinfo;
684 if (inp->in6p_sp != NULL)
685 ipsec6_delete_pcbpolicy(inp);
687 inp->inp_gencnt = ++ipi->ipi_gencnt;
690 KKASSERT((so->so_state & SS_ASSERTINPROG) == 0);
691 sofree(so); /* remove pcb ref */
693 if (inp->in6p_options)
694 m_freem(inp->in6p_options);
695 ip6_freepcbopts(inp->in6p_outputopts);
696 ip6_freemoptions(inp->in6p_moptions);
697 if (inp->in6p_route.ro_rt)
698 rtfree(inp->in6p_route.ro_rt);
699 /* Check and free IPv4 related resources in case of mapped addr */
700 if (inp->inp_options)
701 m_free(inp->inp_options);
702 ip_freemoptions(inp->inp_moptions);
708 * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was
709 * modified to match the pru_sockaddr() and pru_peeraddr() entry points
710 * in struct pr_usrreqs, so that protocols can just reference then directly
711 * without the need for a wrapper function. The socket must have a valid
712 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
713 * except through a kernel programming error, so it is acceptable to panic
714 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
715 * because there actually /is/ a programming error somewhere... XXX)
718 in6_setsockaddr_dispatch(netmsg_t msg)
722 error = in6_setsockaddr(msg->sockaddr.base.nm_so, msg->sockaddr.nm_nam);
723 lwkt_replymsg(&msg->sockaddr.base.lmsg, error);
727 in6_setsockaddr(struct socket *so, struct sockaddr **nam)
730 struct sockaddr_in6 *sin6;
733 * Do the malloc first in case it blocks.
735 sin6 = kmalloc(sizeof *sin6, M_SONAME, M_WAITOK | M_ZERO);
736 sin6->sin6_family = AF_INET6;
737 sin6->sin6_len = sizeof(*sin6);
743 kfree(sin6, M_SONAME);
746 sin6->sin6_port = inp->inp_lport;
747 sin6->sin6_addr = inp->in6p_laddr;
749 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
750 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
752 sin6->sin6_scope_id = 0; /*XXX*/
753 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
754 sin6->sin6_addr.s6_addr16[1] = 0;
756 *nam = (struct sockaddr *)sin6;
761 in6_setpeeraddr_dispatch(netmsg_t msg)
765 error = in6_setpeeraddr(msg->peeraddr.base.nm_so, msg->peeraddr.nm_nam);
766 lwkt_replymsg(&msg->peeraddr.base.lmsg, error);
770 in6_setpeeraddr(struct socket *so, struct sockaddr **nam)
773 struct sockaddr_in6 *sin6;
776 * Do the malloc first in case it blocks.
778 sin6 = kmalloc(sizeof(*sin6), M_SONAME, M_WAITOK | M_ZERO);
779 sin6->sin6_family = AF_INET6;
780 sin6->sin6_len = sizeof(struct sockaddr_in6);
786 kfree(sin6, M_SONAME);
789 sin6->sin6_port = inp->inp_fport;
790 sin6->sin6_addr = inp->in6p_faddr;
792 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
793 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
795 sin6->sin6_scope_id = 0; /*XXX*/
796 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
797 sin6->sin6_addr.s6_addr16[1] = 0;
799 *nam = (struct sockaddr *)sin6;
804 * Pass some notification to all connections of a protocol
805 * associated with address dst. The local address and/or port numbers
806 * may be specified to limit the search. The "usual action" will be
807 * taken, depending on the ctlinput cmd. The caller must filter any
808 * cmds that are uninteresting (e.g., no error in the map).
809 * Call the protocol specific routine (if any) to report
810 * any errors for each matching socket.
813 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, in_port_t fport,
814 const struct sockaddr *src, in_port_t lport, int cmd, int arg,
817 struct inpcb *inp, *marker;
818 struct sockaddr_in6 sa6_src, *sa6_dst;
821 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
824 sa6_dst = (struct sockaddr_in6 *)dst;
825 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
829 * note that src can be NULL when we get notify by local fragmentation.
831 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
832 flowinfo = sa6_src.sin6_flowinfo;
835 * Redirects go to all references to the destination,
836 * and use in6_rtchange to invalidate the route cache.
837 * Dead host indications: also use in6_rtchange to invalidate
838 * the cache, and deliver the error to all the sockets.
839 * Otherwise, if we have knowledge of the local port and address,
840 * deliver only to that socket.
842 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
845 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
847 if (cmd != PRC_HOSTDEAD)
848 notify = in6_rtchange;
850 if (cmd != PRC_MSGSIZE)
851 arg = inet6ctlerrmap[cmd];
853 marker = in_pcbmarker(mycpuid);
855 GET_PCBINFO_TOKEN(pcbinfo);
857 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list);
858 while ((inp = LIST_NEXT(marker, inp_list)) != NULL) {
859 LIST_REMOVE(marker, inp_list);
860 LIST_INSERT_AFTER(inp, marker, inp_list);
862 if (inp->inp_flags & INP_PLACEMARKER)
865 if (!INP_ISIPV6(inp))
868 * If the error designates a new path MTU for a destination
869 * and the application (associated with this socket) wanted to
870 * know the value, notify. Note that we notify for all
871 * disconnected sockets if the corresponding application
872 * wanted. This is because some UDP applications keep sending
873 * sockets disconnected.
874 * XXX: should we avoid to notify the value to TCP sockets?
876 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 &&
877 (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
878 IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) {
879 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, &arg);
883 * Detect if we should notify the error. If no source and
884 * destination ports are specifed, but non-zero flowinfo and
885 * local address match, notify the error. This is the case
886 * when the error is delivered with an encrypted buffer
887 * by ESP. Otherwise, just compare addresses and ports
890 if (lport == 0 && fport == 0 && flowinfo &&
891 inp->inp_socket != NULL &&
892 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
893 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
895 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
896 &sa6_dst->sin6_addr) ||
897 inp->inp_socket == 0 ||
898 (lport && inp->inp_lport != lport) ||
899 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
900 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
901 &sa6_src.sin6_addr)) ||
902 (fport && inp->inp_fport != fport))
909 LIST_REMOVE(marker, inp_list);
911 REL_PCBINFO_TOKEN(pcbinfo);
915 * Lookup a PCB based on the local address and port.
918 in6_pcblookup_local(struct inpcbportinfo *portinfo,
919 const struct in6_addr *laddr, u_int lport_arg, int wild_okay,
923 int matchwild = 3, wildcard;
924 u_short lport = lport_arg;
925 struct inpcbporthead *porthash;
926 struct inpcbport *phd;
927 struct inpcb *match = NULL;
930 * If the porthashbase is shared across several cpus, it must
933 ASSERT_PORT_TOKEN_HELD(portinfo);
936 * Best fit PCB lookup.
938 * First see if this local port is in use by looking on the
941 porthash = &portinfo->porthashbase[
942 INP_PCBPORTHASH(lport, portinfo->porthashmask)];
943 LIST_FOREACH(phd, porthash, phd_hash) {
944 if (phd->phd_port == lport)
950 * Port is in use by one or more PCBs. Look for best
953 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
955 if (!INP_ISIPV6(inp))
957 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
959 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
960 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
962 else if (!IN6_ARE_ADDR_EQUAL(
963 &inp->in6p_laddr, laddr))
966 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
969 if (wildcard && !wild_okay)
971 if (wildcard < matchwild &&
974 inp->inp_socket->so_cred->cr_prison)) {
976 matchwild = wildcard;
980 matchwild = wildcard;
988 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
990 struct in6pcb *in6p, *marker;
991 struct ip6_moptions *im6o;
992 struct in6_multi_mship *imm, *nimm;
995 * We only need to make sure that we are in netisr0, where all
996 * multicast operation happen. We could check inpcbinfo which
997 * does not belong to netisr0 by holding the inpcbinfo's token.
998 * In this case, the pcbinfo must be able to be shared, i.e.
999 * pcbinfo->infotoken is not NULL.
1001 KASSERT(&curthread->td_msgport == netisr_cpuport(0),
1002 ("not in netisr0"));
1003 KASSERT(pcbinfo->cpu == 0 || pcbinfo->infotoken != NULL,
1004 ("pcbinfo could not be shared"));
1007 * Get a marker for the current netisr (netisr0).
1009 * It is possible that the multicast address deletion blocks,
1010 * which could cause temporary token releasing. So we use
1011 * inpcb marker here to get a coherent view of the inpcb list.
1013 * While, on the other hand, moptions are only added and deleted
1014 * in netisr0, so we would not see staled moption or miss moption
1015 * even if the token was released due to the blocking multicast
1018 marker = in_pcbmarker(mycpuid);
1020 GET_PCBINFO_TOKEN(pcbinfo);
1022 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list);
1023 while ((in6p = LIST_NEXT(marker, inp_list)) != NULL) {
1024 LIST_REMOVE(marker, inp_list);
1025 LIST_INSERT_AFTER(in6p, marker, inp_list);
1027 if (in6p->in6p_flags & INP_PLACEMARKER)
1029 im6o = in6p->in6p_moptions;
1030 if (INP_ISIPV6(in6p) && im6o) {
1032 * Unselect the outgoing interface if it is being
1035 if (im6o->im6o_multicast_ifp == ifp)
1036 im6o->im6o_multicast_ifp = NULL;
1039 * Drop multicast group membership if we joined
1040 * through the interface being detached.
1041 * XXX controversial - is it really legal for kernel
1044 for (imm = im6o->im6o_memberships.lh_first;
1045 imm != NULL; imm = nimm) {
1046 nimm = imm->i6mm_chain.le_next;
1047 if (imm->i6mm_maddr->in6m_ifp == ifp) {
1048 LIST_REMOVE(imm, i6mm_chain);
1049 in6_delmulti(imm->i6mm_maddr);
1050 kfree(imm, M_IPMADDR);
1055 LIST_REMOVE(marker, inp_list);
1057 REL_PCBINFO_TOKEN(pcbinfo);
1061 * Check for alternatives when higher level complains
1062 * about service problems. For now, invalidate cached
1063 * routing information. If the route was created dynamically
1064 * (by a redirect), time to try a default gateway again.
1067 in6_losing(struct inpcb *in6p)
1070 struct rt_addrinfo info;
1072 if ((rt = in6p->in6p_route.ro_rt) != NULL) {
1073 bzero((caddr_t)&info, sizeof(info));
1074 info.rti_flags = rt->rt_flags;
1075 info.rti_info[RTAX_DST] = rt_key(rt);
1076 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1077 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
1078 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
1079 if (rt->rt_flags & RTF_DYNAMIC) {
1080 rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
1081 rt_mask(rt), rt->rt_flags, NULL);
1083 in6p->in6p_route.ro_rt = NULL;
1086 * A new route can be allocated
1087 * the next time output is attempted.
1093 * After a routing change, flush old routing
1094 * and allocate a (hopefully) better one.
1097 in6_rtchange(struct inpcb *inp, int error)
1099 if (inp->in6p_route.ro_rt) {
1100 rtfree(inp->in6p_route.ro_rt);
1101 inp->in6p_route.ro_rt = 0;
1103 * A new route can be allocated the next time
1104 * output is attempted.
1110 * Lookup PCB in hash list.
1113 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1114 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
1115 int wildcard, struct ifnet *ifp)
1117 struct inpcbhead *head;
1119 struct inpcb *jinp = NULL;
1120 u_short fport = fport_arg, lport = lport_arg;
1123 if (faithprefix_p != NULL)
1124 faith = (*faithprefix_p)(laddr);
1129 * First look for an exact match.
1131 head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr->s6_addr32[3] /* XXX */,
1133 laddr->s6_addr32[3], /* XXX JH */
1135 pcbinfo->hashmask)];
1136 LIST_FOREACH(inp, head, inp_hash) {
1137 if (!INP_ISIPV6(inp))
1139 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1140 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1141 inp->inp_fport == fport &&
1142 inp->inp_lport == lport) {
1146 if (inp->inp_socket == NULL ||
1147 inp->inp_socket->so_cred->cr_prison == NULL) {
1159 struct inpcontainerhead *chead;
1160 struct inpcontainer *ic;
1161 struct inpcb *local_wild = NULL;
1162 struct inpcb *jinp_wild = NULL;
1163 struct sockaddr_in6 jsin6;
1167 * Order of socket selection:
1168 * 1. non-jailed, non-wild.
1169 * 2. non-jailed, wild.
1170 * 3. jailed, non-wild.
1173 jsin6.sin6_family = AF_INET6;
1174 chead = &pcbinfo->wildcardhashbase[INP_PCBWILDCARDHASH(lport,
1175 pcbinfo->wildcardhashmask)];
1177 GET_PCBINFO_TOKEN(pcbinfo);
1178 LIST_FOREACH(ic, chead, ic_list) {
1180 if (inp->inp_flags & INP_PLACEMARKER)
1183 if (!INP_ISIPV6(inp))
1185 if (inp->inp_socket != NULL)
1186 cred = inp->inp_socket->so_cred;
1190 if (cred != NULL && jailed(cred)) {
1194 jsin6.sin6_addr = *laddr;
1195 if (!jailed_ip(cred->cr_prison,
1196 (struct sockaddr *)&jsin6))
1200 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
1201 inp->inp_lport == lport) {
1202 if (faith && (inp->inp_flags & INP_FAITH) == 0)
1204 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
1206 if (cred != NULL && jailed(cred)) {
1209 REL_PCBINFO_TOKEN(pcbinfo);
1212 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1213 if (cred != NULL && jailed(cred))
1220 REL_PCBINFO_TOKEN(pcbinfo);
1222 if (local_wild != NULL)
1223 return (local_wild);
1236 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1240 ip = mtod(m, struct ip6_hdr *);
1241 bzero(sin6, sizeof(*sin6));
1242 sin6->sin6_len = sizeof(*sin6);
1243 sin6->sin6_family = AF_INET6;
1244 sin6->sin6_addr = ip->ip6_src;
1245 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1246 sin6->sin6_addr.s6_addr16[1] = 0;
1247 sin6->sin6_scope_id =
1248 (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1249 ? m->m_pkthdr.rcvif->if_index : 0;
1255 in6_savefaddr(struct socket *so, const struct sockaddr *faddr)
1257 struct sockaddr_in6 *sin6;
1259 KASSERT(faddr->sa_family == AF_INET6,
1260 ("not AF_INET6 faddr %d", faddr->sa_family));
1262 sin6 = kmalloc(sizeof(*sin6), M_SONAME, M_WAITOK | M_ZERO);
1263 sin6->sin6_family = AF_INET6;
1264 sin6->sin6_len = sizeof(*sin6);
1266 sin6->sin6_port = ((const struct sockaddr_in6 *)faddr)->sin6_port;
1267 sin6->sin6_addr = ((const struct sockaddr_in6 *)faddr)->sin6_addr;
1269 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1270 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
1272 sin6->sin6_scope_id = 0; /*XXX*/
1273 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1274 sin6->sin6_addr.s6_addr16[1] = 0;
1276 so->so_faddr = (struct sockaddr *)sin6;