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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9 * modification, are permitted provided that the following conditions
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17 * may be used to endorse or promote products derived from this software
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52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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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>
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>
104 #include <netinet6/ipsec.h>
106 #include <netinet6/ipsec6.h>
108 #include <netinet6/ah.h>
110 #include <netinet6/ah6.h>
112 #include <netproto/key/key.h>
116 #include <netproto/ipsec/ipsec.h>
117 #include <netproto/ipsec/ipsec6.h>
118 #include <netproto/ipsec/key.h>
120 #endif /* FAST_IPSEC */
122 struct in6_addr zeroin6_addr;
125 in6_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
127 struct socket *so = inp->inp_socket;
128 struct sockaddr_in6 *sin6 = NULL;
129 struct sockaddr_in6 jsin6;
130 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
131 struct proc *p = td->td_proc;
132 struct ucred *cred = NULL;
134 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
136 if (!in6_ifaddr) /* XXX broken! */
137 return (EADDRNOTAVAIL);
138 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
140 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
145 sin6 = (struct sockaddr_in6 *)nam;
146 if (nam->sa_len != sizeof(*sin6))
151 if (nam->sa_family != AF_INET6)
152 return (EAFNOSUPPORT);
154 if (!prison_replace_wildcards(td, nam))
157 /* KAME hack: embed scopeid */
158 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0)
160 /* this must be cleared for ifa_ifwithaddr() */
161 sin6->sin6_scope_id = 0;
163 lport = sin6->sin6_port;
164 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
166 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
167 * allow compepte duplication of binding if
168 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
169 * and a multicast address is bound on both
170 * new and duplicated sockets.
172 if (so->so_options & SO_REUSEADDR)
173 reuseport = SO_REUSEADDR|SO_REUSEPORT;
174 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
175 struct ifaddr *ia = NULL;
177 sin6->sin6_port = 0; /* yech... */
178 if (!prison_replace_wildcards(td, (struct sockaddr *)sin6)) {
179 sin6->sin6_addr = kin6addr_any;
182 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == NULL)
183 return (EADDRNOTAVAIL);
186 * XXX: bind to an anycast address might accidentally
187 * cause sending a packet with anycast source address.
188 * We should allow to bind to a deprecated address, since
189 * the application dare to use it.
192 ((struct in6_ifaddr *)ia)->ia6_flags &
193 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
194 return (EADDRNOTAVAIL);
201 if (ntohs(lport) < IPV6PORT_RESERVED && cred &&
202 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0))
204 if (so->so_cred->cr_uid != 0 &&
205 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
206 t = in6_pcblookup_local(pcbinfo,
207 &sin6->sin6_addr, lport,
208 INPLOOKUP_WILDCARD, cred);
210 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
211 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
212 (t->inp_socket->so_options &
213 SO_REUSEPORT) == 0) &&
214 (so->so_cred->cr_uid !=
215 t->inp_socket->so_cred->cr_uid))
217 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
218 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
219 struct sockaddr_in sin;
221 in6_sin6_2_sin(&sin, sin6);
222 t = in_pcblookup_local(pcbinfo,
224 INPLOOKUP_WILDCARD, cred);
226 (so->so_cred->cr_uid !=
227 t->inp_socket->so_cred->cr_uid) &&
228 (ntohl(t->inp_laddr.s_addr) !=
231 INP_SOCKAF(t->inp_socket)))
235 if (cred && cred->cr_prison &&
236 !prison_replace_wildcards(td, nam))
237 return(EADDRNOTAVAIL);
238 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
240 if (t && (reuseport & t->inp_socket->so_options) == 0)
242 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
243 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
244 struct sockaddr_in sin;
246 in6_sin6_2_sin(&sin, sin6);
247 t = in_pcblookup_local(pcbinfo,
251 (reuseport & t->inp_socket->so_options)
253 (ntohl(t->inp_laddr.s_addr)
256 INP_SOCKAF(t->inp_socket)))
260 inp->in6p_laddr = sin6->sin6_addr;
265 jsin6.sin6_addr = inp->in6p_laddr;
266 jsin6.sin6_family = AF_INET6;
267 if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin6)) {
268 inp->in6p_laddr = kin6addr_any;
273 if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, td)) != 0)
277 inp->inp_lport = lport;
278 if (in_pcbinsporthash(inp) != 0) {
279 inp->in6p_laddr = kin6addr_any;
288 * Transform old in6_pcbconnect() into an inner subroutine for new
289 * in6_pcbconnect(): Do some validity-checking on the remote
290 * address (in mbuf 'nam') and then determine local host address
291 * (i.e., which interface) to use to access that remote host.
293 * This preserves definition of in6_pcbconnect(), while supporting a
294 * slightly different version for T/TCP. (This is more than
295 * a bit of a kludge, but cleaning up the internal interfaces would
296 * have forced minor changes in every protocol).
300 in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
301 struct in6_addr **plocal_addr6, struct thread *td)
303 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
304 struct ifnet *ifp = NULL;
307 if (nam->sa_len != sizeof (*sin6))
309 if (sin6->sin6_family != AF_INET6)
310 return (EAFNOSUPPORT);
311 if (sin6->sin6_port == 0)
312 return (EADDRNOTAVAIL);
314 /* KAME hack: embed scopeid */
315 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0)
320 * If the destination address is UNSPECIFIED addr,
321 * use the loopback addr, e.g ::1.
323 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
324 sin6->sin6_addr = kin6addr_loopback;
328 * XXX: in6_selectsrc might replace the bound local address
329 * with the address specified by setsockopt(IPV6_PKTINFO).
330 * Is it the intended behavior?
332 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts,
335 &inp->in6p_laddr, &error, td);
336 if (*plocal_addr6 == NULL) {
338 error = EADDRNOTAVAIL;
342 * Don't do pcblookup call here; return interface in
344 * and exit to caller, that will do the lookup.
348 if (inp->in6p_route.ro_rt)
349 ifp = inp->in6p_route.ro_rt->rt_ifp;
356 * Connect from a socket to a specified address.
357 * Both address and port must be specified in argument sin.
358 * If don't have a local address for this socket yet,
362 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
364 struct in6_addr *addr6;
365 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
369 * Call inner routine, to assign local interface address.
370 * in6_pcbladdr() may automatically fill in sin6_scope_id.
372 if ((error = in6_pcbladdr(inp, nam, &addr6, td)) != 0)
375 if (in6_pcblookup_hash(inp->inp_cpcbinfo, &sin6->sin6_addr,
377 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
378 ? addr6 : &inp->in6p_laddr,
379 inp->inp_lport, 0, NULL) != NULL) {
382 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
383 if (inp->inp_lport == 0) {
384 error = in6_pcbbind(inp, NULL, td);
388 inp->in6p_laddr = *addr6;
390 inp->in6p_faddr = sin6->sin6_addr;
391 inp->inp_fport = sin6->sin6_port;
392 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
393 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
394 if (inp->in6p_flags & IN6P_AUTOFLOWLABEL)
395 inp->in6p_flowinfo |=
396 (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK);
398 in_pcbinsconnhash(inp);
404 * Return an IPv6 address, which is the most appropriate for given
405 * destination and user specified options.
406 * If necessary, this function lookups the routing table and return
407 * an entry to the caller for later use.
410 in6_selectsrc(struct sockaddr_in6 *dstsock, struct ip6_pktopts *opts,
411 struct ip6_moptions *mopts, struct route_in6 *ro,
412 struct in6_addr *laddr, int *errorp, struct thread *td)
414 struct sockaddr_in6 jsin6;
415 struct ucred *cred = NULL;
416 struct in6_addr *dst;
417 struct in6_ifaddr *ia6 = 0;
418 struct in6_pktinfo *pi = NULL;
421 if (td && td->td_proc && td->td_proc->p_ucred)
422 cred = td->td_proc->p_ucred;
423 if (cred && cred->cr_prison)
425 jsin6.sin6_family = AF_INET6;
426 dst = &dstsock->sin6_addr;
430 * If the source address is explicitly specified by the caller,
433 if (opts && (pi = opts->ip6po_pktinfo) &&
434 !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr)) {
435 jsin6.sin6_addr = pi->ipi6_addr;
436 if (jailed && !jailed_ip(cred->cr_prison,
437 (struct sockaddr *)&jsin6)) {
440 return (&pi->ipi6_addr);
445 * If the source address is not specified but the socket(if any)
446 * is already bound, use the bound address.
448 if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr)) {
449 jsin6.sin6_addr = *laddr;
450 if (jailed && !jailed_ip(cred->cr_prison,
451 (struct sockaddr *)&jsin6)) {
459 * If the caller doesn't specify the source address but
460 * the outgoing interface, use an address associated with
463 if (pi && pi->ipi6_ifindex) {
464 /* XXX boundary check is assumed to be already done. */
465 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex],
469 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
470 if (!jailed_ip(cred->cr_prison,
471 (struct sockaddr *)&jsin6))
476 *errorp = EADDRNOTAVAIL;
479 return (&satosin6(&ia6->ia_addr)->sin6_addr);
483 * If the destination address is a link-local unicast address or
484 * a multicast address, and if the outgoing interface is specified
485 * by the sin6_scope_id filed, use an address associated with the
487 * XXX: We're now trying to define more specific semantics of
488 * sin6_scope_id field, so this part will be rewritten in
491 if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) &&
492 dstsock->sin6_scope_id) {
494 * I'm not sure if boundary check for scope_id is done
497 if (dstsock->sin6_scope_id < 0 ||
498 if_index < dstsock->sin6_scope_id) {
499 *errorp = ENXIO; /* XXX: better error? */
502 ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id],
506 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
507 if (!jailed_ip(cred->cr_prison,
508 (struct sockaddr *)&jsin6))
513 *errorp = EADDRNOTAVAIL;
516 return (&satosin6(&ia6->ia_addr)->sin6_addr);
520 * If the destination address is a multicast address and
521 * the outgoing interface for the address is specified
522 * by the caller, use an address associated with the interface.
523 * There is a sanity check here; if the destination has node-local
524 * scope, the outgoing interfacde should be a loopback address.
525 * Even if the outgoing interface is not specified, we also
526 * choose a loopback interface as the outgoing interface.
528 if (!jailed && IN6_IS_ADDR_MULTICAST(dst)) {
529 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL;
531 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) {
536 ia6 = in6_ifawithscope(ifp, dst, cred);
538 *errorp = EADDRNOTAVAIL;
541 return (&ia6->ia_addr.sin6_addr);
546 * If the next hop address for the packet is specified
547 * by caller, use an address associated with the route
551 struct sockaddr_in6 *sin6_next;
554 if (opts && opts->ip6po_nexthop) {
555 sin6_next = satosin6(opts->ip6po_nexthop);
556 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL);
558 ia6 = in6_ifawithscope(rt->rt_ifp, dst, cred);
560 ia6 = ifatoia6(rt->rt_ifa);
563 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
564 if (!jailed_ip(cred->cr_prison,
565 (struct sockaddr *)&jsin6))
570 *errorp = EADDRNOTAVAIL;
573 return (&satosin6(&ia6->ia_addr)->sin6_addr);
578 * If route is known or can be allocated now,
579 * our src addr is taken from the i/f, else punt.
583 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) {
587 if (ro->ro_rt == NULL || ro->ro_rt->rt_ifp == NULL) {
588 struct sockaddr_in6 *dst6;
590 /* No route yet, so try to acquire one */
591 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6));
593 dst6->sin6_family = AF_INET6;
594 dst6->sin6_len = sizeof(struct sockaddr_in6);
595 dst6->sin6_addr = *dst;
596 if (!jailed && IN6_IS_ADDR_MULTICAST(dst)) {
598 rtpurelookup((struct sockaddr *)&ro->ro_dst);
600 rtalloc((struct route *)ro);
605 * in_pcbconnect() checks out IFF_LOOPBACK to skip using
606 * the address. But we don't know why it does so.
607 * It is necessary to ensure the scope even for lo0
608 * so doesn't check out IFF_LOOPBACK.
612 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst, cred);
614 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
615 if (!jailed_ip(cred->cr_prison,
616 (struct sockaddr *)&jsin6))
620 if (ia6 == 0) /* xxx scope error ?*/
621 ia6 = ifatoia6(ro->ro_rt->rt_ifa);
624 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
625 if (!jailed_ip(cred->cr_prison,
626 (struct sockaddr *)&jsin6))
631 *errorp = EHOSTUNREACH; /* no route */
634 return (&satosin6(&ia6->ia_addr)->sin6_addr);
637 *errorp = EADDRNOTAVAIL;
642 * Default hop limit selection. The precedence is as follows:
643 * 1. Hoplimit valued specified via ioctl.
644 * 2. (If the outgoing interface is detected) the current
645 * hop limit of the interface specified by router advertisement.
646 * 3. The system default hoplimit.
649 in6_selecthlim(struct in6pcb *in6p, struct ifnet *ifp)
651 if (in6p && in6p->in6p_hops >= 0)
652 return (in6p->in6p_hops);
654 return (ND_IFINFO(ifp)->chlim);
656 return (ip6_defhlim);
661 in6_pcbdisconnect(struct inpcb *inp)
663 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
665 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
666 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
667 in_pcbremconnhash(inp);
668 if (inp->inp_socket->so_state & SS_NOFDREF)
673 in6_pcbdetach(struct inpcb *inp)
675 struct socket *so = inp->inp_socket;
676 struct inpcbinfo *ipi = inp->inp_pcbinfo;
679 if (inp->in6p_sp != NULL)
680 ipsec6_delete_pcbpolicy(inp);
682 inp->inp_gencnt = ++ipi->ipi_gencnt;
685 KKASSERT((so->so_state & SS_ASSERTINPROG) == 0);
686 sofree(so); /* remove pcb ref */
688 if (inp->in6p_options)
689 m_freem(inp->in6p_options);
690 ip6_freepcbopts(inp->in6p_outputopts);
691 ip6_freemoptions(inp->in6p_moptions);
692 if (inp->in6p_route.ro_rt)
693 rtfree(inp->in6p_route.ro_rt);
694 /* Check and free IPv4 related resources in case of mapped addr */
695 if (inp->inp_options)
696 m_free(inp->inp_options);
697 ip_freemoptions(inp->inp_moptions);
704 * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was
705 * modified to match the pru_sockaddr() and pru_peeraddr() entry points
706 * in struct pr_usrreqs, so that protocols can just reference then directly
707 * without the need for a wrapper function. The socket must have a valid
708 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
709 * except through a kernel programming error, so it is acceptable to panic
710 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
711 * because there actually /is/ a programming error somewhere... XXX)
714 in6_setsockaddr_dispatch(netmsg_t msg)
718 error = in6_setsockaddr(msg->sockaddr.base.nm_so, msg->sockaddr.nm_nam);
719 lwkt_replymsg(&msg->sockaddr.base.lmsg, error);
723 in6_setsockaddr(struct socket *so, struct sockaddr **nam)
726 struct sockaddr_in6 *sin6;
729 * Do the malloc first in case it blocks.
731 sin6 = kmalloc(sizeof *sin6, M_SONAME, M_WAITOK | M_ZERO);
732 sin6->sin6_family = AF_INET6;
733 sin6->sin6_len = sizeof(*sin6);
739 kfree(sin6, M_SONAME);
742 sin6->sin6_port = inp->inp_lport;
743 sin6->sin6_addr = inp->in6p_laddr;
745 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
746 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
748 sin6->sin6_scope_id = 0; /*XXX*/
749 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
750 sin6->sin6_addr.s6_addr16[1] = 0;
752 *nam = (struct sockaddr *)sin6;
757 in6_setpeeraddr_dispatch(netmsg_t msg)
761 error = in6_setpeeraddr(msg->peeraddr.base.nm_so, msg->peeraddr.nm_nam);
762 lwkt_replymsg(&msg->peeraddr.base.lmsg, error);
766 in6_setpeeraddr(struct socket *so, struct sockaddr **nam)
769 struct sockaddr_in6 *sin6;
772 * Do the malloc first in case it blocks.
774 sin6 = kmalloc(sizeof(*sin6), M_SONAME, M_WAITOK | M_ZERO);
775 sin6->sin6_family = AF_INET6;
776 sin6->sin6_len = sizeof(struct sockaddr_in6);
782 kfree(sin6, M_SONAME);
785 sin6->sin6_port = inp->inp_fport;
786 sin6->sin6_addr = inp->in6p_faddr;
788 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
789 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
791 sin6->sin6_scope_id = 0; /*XXX*/
792 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
793 sin6->sin6_addr.s6_addr16[1] = 0;
795 *nam = (struct sockaddr *)sin6;
800 in6_mapped_sockaddr_dispatch(netmsg_t msg)
804 error = in6_mapped_sockaddr(msg->sockaddr.base.nm_so,
805 msg->sockaddr.nm_nam);
806 lwkt_replymsg(&msg->sockaddr.base.lmsg, error);
810 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
812 struct inpcb *inp = so->so_pcb;
817 if (inp->inp_vflag & INP_IPV4) {
818 error = in_setsockaddr(so, nam);
820 in6_sin_2_v4mapsin6_in_sock(nam);
822 /* scope issues will be handled in in6_setsockaddr(). */
823 error = in6_setsockaddr(so, nam);
829 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
831 struct inpcb *inp = so->so_pcb;
836 if (inp->inp_vflag & INP_IPV4) {
837 error = in_setpeeraddr(so, nam);
839 in6_sin_2_v4mapsin6_in_sock(nam);
841 /* scope issues will be handled in in6_setpeeraddr(). */
842 error = in6_setpeeraddr(so, nam);
848 in6_mapped_peeraddr_dispatch(netmsg_t msg)
852 error = in6_mapped_peeraddr(msg->base.nm_so, msg->peeraddr.nm_nam);
853 lwkt_replymsg(&msg->base.lmsg, error);
857 * Pass some notification to all connections of a protocol
858 * associated with address dst. The local address and/or port numbers
859 * may be specified to limit the search. The "usual action" will be
860 * taken, depending on the ctlinput cmd. The caller must filter any
861 * cmds that are uninteresting (e.g., no error in the map).
862 * Call the protocol specific routine (if any) to report
863 * any errors for each matching socket.
865 * Must be called under crit_enter().
868 in6_pcbnotify(struct inpcbhead *head, struct sockaddr *dst, in_port_t fport,
869 const struct sockaddr *src, in_port_t lport, int cmd, int arg,
870 void (*notify) (struct inpcb *, int))
872 struct inpcb *inp, *ninp;
873 struct sockaddr_in6 sa6_src, *sa6_dst;
876 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
879 sa6_dst = (struct sockaddr_in6 *)dst;
880 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
884 * note that src can be NULL when we get notify by local fragmentation.
886 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
887 flowinfo = sa6_src.sin6_flowinfo;
890 * Redirects go to all references to the destination,
891 * and use in6_rtchange to invalidate the route cache.
892 * Dead host indications: also use in6_rtchange to invalidate
893 * the cache, and deliver the error to all the sockets.
894 * Otherwise, if we have knowledge of the local port and address,
895 * deliver only to that socket.
897 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
900 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
902 if (cmd != PRC_HOSTDEAD)
903 notify = in6_rtchange;
905 if (cmd != PRC_MSGSIZE)
906 arg = inet6ctlerrmap[cmd];
908 for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
909 ninp = LIST_NEXT(inp, inp_list);
911 if (inp->inp_flags & INP_PLACEMARKER)
914 if ((inp->inp_vflag & INP_IPV6) == 0)
917 * If the error designates a new path MTU for a destination
918 * and the application (associated with this socket) wanted to
919 * know the value, notify. Note that we notify for all
920 * disconnected sockets if the corresponding application
921 * wanted. This is because some UDP applications keep sending
922 * sockets disconnected.
923 * XXX: should we avoid to notify the value to TCP sockets?
925 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 &&
926 (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
927 IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) {
928 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, &arg);
932 * Detect if we should notify the error. If no source and
933 * destination ports are specifed, but non-zero flowinfo and
934 * local address match, notify the error. This is the case
935 * when the error is delivered with an encrypted buffer
936 * by ESP. Otherwise, just compare addresses and ports
939 if (lport == 0 && fport == 0 && flowinfo &&
940 inp->inp_socket != NULL &&
941 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
942 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
944 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
945 &sa6_dst->sin6_addr) ||
946 inp->inp_socket == 0 ||
947 (lport && inp->inp_lport != lport) ||
948 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
949 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
950 &sa6_src.sin6_addr)) ||
951 (fport && inp->inp_fport != fport))
962 * Lookup a PCB based on the local address and port.
965 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
966 u_int lport_arg, int wild_okay, struct ucred *cred)
969 int matchwild = 3, wildcard;
970 u_short lport = lport_arg;
971 struct inpcbporthead *porthash;
972 struct inpcbport *phd;
973 struct inpcb *match = NULL;
976 * If the porthashbase is shared across several cpus we need
979 if (pcbinfo->porttoken)
980 lwkt_gettoken(pcbinfo->porttoken);
983 * Best fit PCB lookup.
985 * First see if this local port is in use by looking on the
988 porthash = &pcbinfo->porthashbase[
989 INP_PCBPORTHASH(lport, pcbinfo->porthashmask)];
990 LIST_FOREACH(phd, porthash, phd_hash) {
991 if (phd->phd_port == lport)
997 * Port is in use by one or more PCBs. Look for best
1000 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
1002 if ((inp->inp_vflag & INP_IPV6) == 0)
1004 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
1006 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1007 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
1009 else if (!IN6_ARE_ADDR_EQUAL(
1010 &inp->in6p_laddr, laddr))
1013 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
1016 if (wildcard && !wild_okay)
1018 if (wildcard < matchwild &&
1021 inp->inp_socket->so_cred->cr_prison)) {
1023 matchwild = wildcard;
1027 matchwild = wildcard;
1031 if (pcbinfo->porttoken)
1032 lwkt_reltoken(pcbinfo->porttoken);
1038 in6_pcbpurgeif0(struct in6pcb *head, struct ifnet *ifp)
1040 struct in6pcb *in6p;
1041 struct ip6_moptions *im6o;
1042 struct in6_multi_mship *imm, *nimm;
1044 for (in6p = head; in6p != NULL; in6p = LIST_NEXT(in6p, inp_list)) {
1045 if (in6p->in6p_flags & INP_PLACEMARKER)
1047 im6o = in6p->in6p_moptions;
1048 if ((in6p->inp_vflag & INP_IPV6) &&
1051 * Unselect the outgoing interface if it is being
1054 if (im6o->im6o_multicast_ifp == ifp)
1055 im6o->im6o_multicast_ifp = NULL;
1058 * Drop multicast group membership if we joined
1059 * through the interface being detached.
1060 * XXX controversial - is it really legal for kernel
1063 for (imm = im6o->im6o_memberships.lh_first;
1064 imm != NULL; imm = nimm) {
1065 nimm = imm->i6mm_chain.le_next;
1066 if (imm->i6mm_maddr->in6m_ifp == ifp) {
1067 LIST_REMOVE(imm, i6mm_chain);
1068 in6_delmulti(imm->i6mm_maddr);
1069 kfree(imm, M_IPMADDR);
1077 * Check for alternatives when higher level complains
1078 * about service problems. For now, invalidate cached
1079 * routing information. If the route was created dynamically
1080 * (by a redirect), time to try a default gateway again.
1083 in6_losing(struct inpcb *in6p)
1086 struct rt_addrinfo info;
1088 if ((rt = in6p->in6p_route.ro_rt) != NULL) {
1089 bzero((caddr_t)&info, sizeof(info));
1090 info.rti_flags = rt->rt_flags;
1091 info.rti_info[RTAX_DST] = rt_key(rt);
1092 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1093 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
1094 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
1095 if (rt->rt_flags & RTF_DYNAMIC) {
1096 rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
1097 rt_mask(rt), rt->rt_flags, NULL);
1099 in6p->in6p_route.ro_rt = NULL;
1102 * A new route can be allocated
1103 * the next time output is attempted.
1109 * After a routing change, flush old routing
1110 * and allocate a (hopefully) better one.
1113 in6_rtchange(struct inpcb *inp, int error)
1115 if (inp->in6p_route.ro_rt) {
1116 rtfree(inp->in6p_route.ro_rt);
1117 inp->in6p_route.ro_rt = 0;
1119 * A new route can be allocated the next time
1120 * output is attempted.
1126 * Lookup PCB in hash list.
1129 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1130 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
1131 int wildcard, struct ifnet *ifp)
1133 struct inpcbhead *head;
1135 struct inpcb *jinp = NULL;
1136 u_short fport = fport_arg, lport = lport_arg;
1139 if (faithprefix_p != NULL)
1140 faith = (*faithprefix_p)(laddr);
1145 * First look for an exact match.
1147 head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr->s6_addr32[3] /* XXX */,
1149 laddr->s6_addr32[3], /* XXX JH */
1151 pcbinfo->hashmask)];
1152 LIST_FOREACH(inp, head, inp_hash) {
1153 if ((inp->inp_vflag & INP_IPV6) == 0)
1155 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1156 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1157 inp->inp_fport == fport &&
1158 inp->inp_lport == lport) {
1162 if (inp->inp_socket == NULL ||
1163 inp->inp_socket->so_cred->cr_prison == NULL) {
1174 struct inpcontainerhead *chead;
1175 struct inpcontainer *ic;
1176 struct inpcb *local_wild = NULL;
1177 struct inpcb *jinp_wild = NULL;
1178 struct sockaddr_in6 jsin6;
1182 * Order of socket selection:
1183 * 1. non-jailed, non-wild.
1184 * 2. non-jailed, wild.
1185 * 3. jailed, non-wild.
1188 jsin6.sin6_family = AF_INET6;
1189 chead = &pcbinfo->wildcardhashbase[INP_PCBWILDCARDHASH(lport,
1190 pcbinfo->wildcardhashmask)];
1191 LIST_FOREACH(ic, chead, ic_list) {
1194 if (!(inp->inp_vflag & INP_IPV6))
1196 if (inp->inp_socket != NULL)
1197 cred = inp->inp_socket->so_cred;
1201 if (cred != NULL && jailed(cred)) {
1205 jsin6.sin6_addr = *laddr;
1206 if (!jailed_ip(cred->cr_prison,
1207 (struct sockaddr *)&jsin6))
1211 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
1212 inp->inp_lport == lport) {
1213 if (faith && (inp->inp_flags & INP_FAITH) == 0)
1215 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
1217 if (cred != NULL && jailed(cred))
1221 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1222 if (cred != NULL && jailed(cred))
1229 if (local_wild != NULL)
1230 return (local_wild);
1243 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1247 ip = mtod(m, struct ip6_hdr *);
1248 bzero(sin6, sizeof(*sin6));
1249 sin6->sin6_len = sizeof(*sin6);
1250 sin6->sin6_family = AF_INET6;
1251 sin6->sin6_addr = ip->ip6_src;
1252 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1253 sin6->sin6_addr.s6_addr16[1] = 0;
1254 sin6->sin6_scope_id =
1255 (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1256 ? m->m_pkthdr.rcvif->if_index : 0;
1262 in6_savefaddr(struct socket *so, const struct sockaddr *faddr)
1264 struct sockaddr_in6 *sin6;
1266 KASSERT(faddr->sa_family == AF_INET6,
1267 ("not AF_INET6 faddr %d", faddr->sa_family));
1269 sin6 = kmalloc(sizeof(*sin6), M_SONAME, M_WAITOK | M_ZERO);
1270 sin6->sin6_family = AF_INET6;
1271 sin6->sin6_len = sizeof(*sin6);
1273 sin6->sin6_port = ((const struct sockaddr_in6 *)faddr)->sin6_port;
1274 sin6->sin6_addr = ((const struct sockaddr_in6 *)faddr)->sin6_addr;
1276 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1277 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
1279 sin6->sin6_scope_id = 0; /*XXX*/
1280 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1281 sin6->sin6_addr.s6_addr16[1] = 0;
1283 so->so_faddr = (struct sockaddr *)sin6;
1287 in6_mapped_savefaddr(struct socket *so, const struct sockaddr *faddr)
1289 if (faddr->sa_family == AF_INET) {
1290 in_savefaddr(so, faddr);
1291 in6_sin_2_v4mapsin6_in_sock(&so->so_faddr);
1293 in6_savefaddr(so, faddr);