Initial import

Code is based on FreeBSD 8.2 with USB support from Sebastian Huber
and Thomas Doerfler. Initial TCP/IP stack work is from Kevel Kirspel.

1 files changed, 936 insertions, 0 deletions

diff --git a/rtems/freebsd/netinet6/in6_pcb.c b/rtems/freebsd/netinet6/in6_pcb.c
new file mode 100644
index 00000000..a92f000b
--- /dev/null
+++ b/rtems/freebsd/netinet6/in6_pcb.c
@@ -0,0 +1,936 @@
+#include <rtems/freebsd/machine/rtems-bsd-config.h>
+
+/*-
+ * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	$KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $
+ */
+
+/*-
+ * Copyright (c) 1982, 1986, 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)in_pcb.c	8.2 (Berkeley) 1/4/94
+ */
+
+#include <rtems/freebsd/sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <rtems/freebsd/local/opt_inet.h>
+#include <rtems/freebsd/local/opt_inet6.h>
+#include <rtems/freebsd/local/opt_ipsec.h>
+
+#include <rtems/freebsd/sys/param.h>
+#include <rtems/freebsd/sys/systm.h>
+#include <rtems/freebsd/sys/malloc.h>
+#include <rtems/freebsd/sys/mbuf.h>
+#include <rtems/freebsd/sys/domain.h>
+#include <rtems/freebsd/sys/protosw.h>
+#include <rtems/freebsd/sys/socket.h>
+#include <rtems/freebsd/sys/socketvar.h>
+#include <rtems/freebsd/sys/sockio.h>
+#include <rtems/freebsd/sys/errno.h>
+#include <rtems/freebsd/sys/time.h>
+#include <rtems/freebsd/sys/priv.h>
+#include <rtems/freebsd/sys/proc.h>
+#include <rtems/freebsd/sys/jail.h>
+
+#include <rtems/freebsd/vm/uma.h>
+
+#include <rtems/freebsd/net/if.h>
+#include <rtems/freebsd/net/if_types.h>
+#include <rtems/freebsd/net/route.h>
+
+#include <rtems/freebsd/netinet/in.h>
+#include <rtems/freebsd/netinet/in_var.h>
+#include <rtems/freebsd/netinet/in_systm.h>
+#include <rtems/freebsd/netinet/tcp_var.h>
+#include <rtems/freebsd/netinet/ip6.h>
+#include <rtems/freebsd/netinet/ip_var.h>
+
+#include <rtems/freebsd/netinet6/ip6_var.h>
+#include <rtems/freebsd/netinet6/nd6.h>
+#include <rtems/freebsd/netinet/in_pcb.h>
+#include <rtems/freebsd/netinet6/in6_pcb.h>
+#include <rtems/freebsd/netinet6/scope6_var.h>
+
+#include <rtems/freebsd/security/mac/mac_framework.h>
+
+struct	in6_addr zeroin6_addr;
+
+int
+in6_pcbbind(register struct inpcb *inp, struct sockaddr *nam,
+    struct ucred *cred)
+{
+	struct socket *so = inp->inp_socket;
+	struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
+	struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
+	u_short	lport = 0;
+	int error, wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
+
+	INP_INFO_WLOCK_ASSERT(pcbinfo);
+	INP_WLOCK_ASSERT(inp);
+
+	if (TAILQ_EMPTY(&V_in6_ifaddrhead))	/* XXX broken! */
+		return (EADDRNOTAVAIL);
+	if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
+		return (EINVAL);
+	if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
+		wild = INPLOOKUP_WILDCARD;
+	if (nam == NULL) {
+		if ((error = prison_local_ip6(cred, &inp->in6p_laddr,
+		    ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
+			return (error);
+	} else {
+		sin6 = (struct sockaddr_in6 *)nam;
+		if (nam->sa_len != sizeof(*sin6))
+			return (EINVAL);
+		/*
+		 * family check.
+		 */
+		if (nam->sa_family != AF_INET6)
+			return (EAFNOSUPPORT);
+
+		if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
+			return(error);
+
+		if ((error = prison_local_ip6(cred, &sin6->sin6_addr,
+		    ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
+			return (error);
+
+		lport = sin6->sin6_port;
+		if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
+			/*
+			 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
+			 * allow compepte duplication of binding if
+			 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
+			 * and a multicast address is bound on both
+			 * new and duplicated sockets.
+			 */
+			if (so->so_options & SO_REUSEADDR)
+				reuseport = SO_REUSEADDR|SO_REUSEPORT;
+		} else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
+			struct ifaddr *ifa;
+
+			sin6->sin6_port = 0;		/* yech... */
+			if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) ==
+			    NULL &&
+			    (inp->inp_flags & INP_BINDANY) == 0) {
+				return (EADDRNOTAVAIL);
+			}
+
+			/*
+			 * XXX: bind to an anycast address might accidentally
+			 * cause sending a packet with anycast source address.
+			 * We should allow to bind to a deprecated address, since
+			 * the application dares to use it.
+			 */
+			if (ifa != NULL &&
+			    ((struct in6_ifaddr *)ifa)->ia6_flags &
+			    (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
+				ifa_free(ifa);
+				return (EADDRNOTAVAIL);
+			}
+			if (ifa != NULL)
+				ifa_free(ifa);
+		}
+		if (lport) {
+			struct inpcb *t;
+
+			/* GROSS */
+			if (ntohs(lport) <= V_ipport_reservedhigh &&
+			    ntohs(lport) >= V_ipport_reservedlow &&
+			    priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
+			    0))
+				return (EACCES);
+			if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
+			    priv_check_cred(inp->inp_cred,
+			    PRIV_NETINET_REUSEPORT, 0) != 0) {
+				t = in6_pcblookup_local(pcbinfo,
+				    &sin6->sin6_addr, lport,
+				    INPLOOKUP_WILDCARD, cred);
+				if (t &&
+				    ((t->inp_flags & INP_TIMEWAIT) == 0) &&
+				    (so->so_type != SOCK_STREAM ||
+				     IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) &&
+				    (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
+				     !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
+				     (t->inp_socket->so_options & SO_REUSEPORT)
+				      == 0) && (inp->inp_cred->cr_uid !=
+				     t->inp_cred->cr_uid))
+					return (EADDRINUSE);
+				if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
+				    IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
+					struct sockaddr_in sin;
+
+					in6_sin6_2_sin(&sin, sin6);
+					t = in_pcblookup_local(pcbinfo,
+					    sin.sin_addr, lport,
+					    INPLOOKUP_WILDCARD, cred);
+					if (t &&
+					    ((t->inp_flags &
+					      INP_TIMEWAIT) == 0) &&
+					    (so->so_type != SOCK_STREAM ||
+					     ntohl(t->inp_faddr.s_addr) ==
+					      INADDR_ANY) &&
+					    (inp->inp_cred->cr_uid !=
+					     t->inp_cred->cr_uid))
+						return (EADDRINUSE);
+				}
+			}
+			t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
+			    lport, wild, cred);
+			if (t && (reuseport & ((t->inp_flags & INP_TIMEWAIT) ?
+			    intotw(t)->tw_so_options :
+			    t->inp_socket->so_options)) == 0)
+				return (EADDRINUSE);
+			if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
+			    IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
+				struct sockaddr_in sin;
+
+				in6_sin6_2_sin(&sin, sin6);
+				t = in_pcblookup_local(pcbinfo, sin.sin_addr,
+				    lport, wild, cred);
+				if (t && t->inp_flags & INP_TIMEWAIT) {
+					if ((reuseport &
+					    intotw(t)->tw_so_options) == 0 &&
+					    (ntohl(t->inp_laddr.s_addr) !=
+					     INADDR_ANY || ((inp->inp_vflag &
+					     INP_IPV6PROTO) ==
+					     (t->inp_vflag & INP_IPV6PROTO))))
+						return (EADDRINUSE);
+				}
+				else if (t &&
+				    (reuseport & t->inp_socket->so_options)
+				    == 0 && (ntohl(t->inp_laddr.s_addr) !=
+				    INADDR_ANY || INP_SOCKAF(so) ==
+				     INP_SOCKAF(t->inp_socket)))
+					return (EADDRINUSE);
+			}
+		}
+		inp->in6p_laddr = sin6->sin6_addr;
+	}
+	if (lport == 0) {
+		if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0)
+			return (error);
+	} else {
+		inp->inp_lport = lport;
+		if (in_pcbinshash(inp) != 0) {
+			inp->in6p_laddr = in6addr_any;
+			inp->inp_lport = 0;
+			return (EAGAIN);
+		}
+	}
+	return (0);
+}
+
+/*
+ *   Transform old in6_pcbconnect() into an inner subroutine for new
+ *   in6_pcbconnect(): Do some validity-checking on the remote
+ *   address (in mbuf 'nam') and then determine local host address
+ *   (i.e., which interface) to use to access that remote host.
+ *
+ *   This preserves definition of in6_pcbconnect(), while supporting a
+ *   slightly different version for T/TCP.  (This is more than
+ *   a bit of a kludge, but cleaning up the internal interfaces would
+ *   have forced minor changes in every protocol).
+ */
+int
+in6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam,
+    struct in6_addr *plocal_addr6)
+{
+	register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
+	int error = 0;
+	struct ifnet *ifp = NULL;
+	int scope_ambiguous = 0;
+	struct in6_addr in6a;
+
+	INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
+	INP_WLOCK_ASSERT(inp);
+
+	if (nam->sa_len != sizeof (*sin6))
+		return (EINVAL);
+	if (sin6->sin6_family != AF_INET6)
+		return (EAFNOSUPPORT);
+	if (sin6->sin6_port == 0)
+		return (EADDRNOTAVAIL);
+
+	if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
+		scope_ambiguous = 1;
+	if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
+		return(error);
+
+	if (!TAILQ_EMPTY(&V_in6_ifaddrhead)) {
+		/*
+		 * If the destination address is UNSPECIFIED addr,
+		 * use the loopback addr, e.g ::1.
+		 */
+		if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
+			sin6->sin6_addr = in6addr_loopback;
+	}
+	if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0)
+		return (error);
+
+	error = in6_selectsrc(sin6, inp->in6p_outputopts,
+	    inp, NULL, inp->inp_cred, &ifp, &in6a);
+	if (error)
+		return (error);
+
+	if (ifp && scope_ambiguous &&
+	    (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) {
+		return(error);
+	}
+
+	/*
+	 * Do not update this earlier, in case we return with an error.
+	 *
+	 * XXX: this in6_selectsrc result might replace the bound local
+	 * address with the address specified by setsockopt(IPV6_PKTINFO).
+	 * Is it the intended behavior?
+	 */
+	*plocal_addr6 = in6a;
+
+	/*
+	 * Don't do pcblookup call here; return interface in
+	 * plocal_addr6
+	 * and exit to caller, that will do the lookup.
+	 */
+
+	return (0);
+}
+
+/*
+ * Outer subroutine:
+ * Connect from a socket to a specified address.
+ * Both address and port must be specified in argument sin.
+ * If don't have a local address for this socket yet,
+ * then pick one.
+ */
+int
+in6_pcbconnect(register struct inpcb *inp, struct sockaddr *nam,
+    struct ucred *cred)
+{
+	register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
+	struct in6_addr addr6;
+	int error;
+
+	INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
+	INP_WLOCK_ASSERT(inp);
+
+	/*
+	 * Call inner routine, to assign local interface address.
+	 * in6_pcbladdr() may automatically fill in sin6_scope_id.
+	 */
+	if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
+		return (error);
+
+	if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr,
+			       sin6->sin6_port,
+			      IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
+			      ? &addr6 : &inp->in6p_laddr,
+			      inp->inp_lport, 0, NULL) != NULL) {
+		return (EADDRINUSE);
+	}
+	if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
+		if (inp->inp_lport == 0) {
+			error = in6_pcbbind(inp, (struct sockaddr *)0, cred);
+			if (error)
+				return (error);
+		}
+		inp->in6p_laddr = addr6;
+	}
+	inp->in6p_faddr = sin6->sin6_addr;
+	inp->inp_fport = sin6->sin6_port;
+	/* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
+	inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
+	if (inp->inp_flags & IN6P_AUTOFLOWLABEL)
+		inp->inp_flow |=
+		    (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
+
+	in_pcbrehash(inp);
+
+	return (0);
+}
+
+void
+in6_pcbdisconnect(struct inpcb *inp)
+{
+
+	INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
+	INP_WLOCK_ASSERT(inp);
+
+	bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
+	inp->inp_fport = 0;
+	/* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
+	inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
+	in_pcbrehash(inp);
+}
+
+struct sockaddr *
+in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
+{
+	struct sockaddr_in6 *sin6;
+
+	sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK);
+	bzero(sin6, sizeof *sin6);
+	sin6->sin6_family = AF_INET6;
+	sin6->sin6_len = sizeof(*sin6);
+	sin6->sin6_port = port;
+	sin6->sin6_addr = *addr_p;
+	(void)sa6_recoverscope(sin6); /* XXX: should catch errors */
+
+	return (struct sockaddr *)sin6;
+}
+
+struct sockaddr *
+in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p)
+{
+	struct sockaddr_in sin;
+	struct sockaddr_in6 *sin6_p;
+
+	bzero(&sin, sizeof sin);
+	sin.sin_family = AF_INET;
+	sin.sin_len = sizeof(sin);
+	sin.sin_port = port;
+	sin.sin_addr = *addr_p;
+
+	sin6_p = malloc(sizeof *sin6_p, M_SONAME,
+		M_WAITOK);
+	in6_sin_2_v4mapsin6(&sin, sin6_p);
+
+	return (struct sockaddr *)sin6_p;
+}
+
+int
+in6_getsockaddr(struct socket *so, struct sockaddr **nam)
+{
+	register struct inpcb *inp;
+	struct in6_addr addr;
+	in_port_t port;
+
+	inp = sotoinpcb(so);
+	KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL"));
+
+	INP_RLOCK(inp);
+	port = inp->inp_lport;
+	addr = inp->in6p_laddr;
+	INP_RUNLOCK(inp);
+
+	*nam = in6_sockaddr(port, &addr);
+	return 0;
+}
+
+int
+in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
+{
+	struct inpcb *inp;
+	struct in6_addr addr;
+	in_port_t port;
+
+	inp = sotoinpcb(so);
+	KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL"));
+
+	INP_RLOCK(inp);
+	port = inp->inp_fport;
+	addr = inp->in6p_faddr;
+	INP_RUNLOCK(inp);
+
+	*nam = in6_sockaddr(port, &addr);
+	return 0;
+}
+
+int
+in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
+{
+	struct	inpcb *inp;
+	int	error;
+
+	inp = sotoinpcb(so);
+	KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL"));
+
+	if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
+		error = in_getsockaddr(so, nam);
+		if (error == 0)
+			in6_sin_2_v4mapsin6_in_sock(nam);
+	} else {
+		/* scope issues will be handled in in6_getsockaddr(). */
+		error = in6_getsockaddr(so, nam);
+	}
+
+	return error;
+}
+
+int
+in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
+{
+	struct	inpcb *inp;
+	int	error;
+
+	inp = sotoinpcb(so);
+	KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL"));
+
+	if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
+		error = in_getpeeraddr(so, nam);
+		if (error == 0)
+			in6_sin_2_v4mapsin6_in_sock(nam);
+	} else
+	/* scope issues will be handled in in6_getpeeraddr(). */
+	error = in6_getpeeraddr(so, nam);
+
+	return error;
+}
+
+/*
+ * Pass some notification to all connections of a protocol
+ * associated with address dst.  The local address and/or port numbers
+ * may be specified to limit the search.  The "usual action" will be
+ * taken, depending on the ctlinput cmd.  The caller must filter any
+ * cmds that are uninteresting (e.g., no error in the map).
+ * Call the protocol specific routine (if any) to report
+ * any errors for each matching socket.
+ */
+void
+in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst,
+    u_int fport_arg, const struct sockaddr *src, u_int lport_arg,
+    int cmd, void *cmdarg,
+    struct inpcb *(*notify)(struct inpcb *, int))
+{
+	struct inpcb *inp, *inp_temp;
+	struct sockaddr_in6 sa6_src, *sa6_dst;
+	u_short	fport = fport_arg, lport = lport_arg;
+	u_int32_t flowinfo;
+	int errno;
+
+	if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
+		return;
+
+	sa6_dst = (struct sockaddr_in6 *)dst;
+	if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
+		return;
+
+	/*
+	 * note that src can be NULL when we get notify by local fragmentation.
+	 */
+	sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
+	flowinfo = sa6_src.sin6_flowinfo;
+
+	/*
+	 * Redirects go to all references to the destination,
+	 * and use in6_rtchange to invalidate the route cache.
+	 * Dead host indications: also use in6_rtchange to invalidate
+	 * the cache, and deliver the error to all the sockets.
+	 * Otherwise, if we have knowledge of the local port and address,
+	 * deliver only to that socket.
+	 */
+	if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
+		fport = 0;
+		lport = 0;
+		bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
+
+		if (cmd != PRC_HOSTDEAD)
+			notify = in6_rtchange;
+	}
+	errno = inet6ctlerrmap[cmd];
+	INP_INFO_WLOCK(pcbinfo);
+	LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
+		INP_WLOCK(inp);
+		if ((inp->inp_vflag & INP_IPV6) == 0) {
+			INP_WUNLOCK(inp);
+			continue;
+		}
+
+		/*
+		 * If the error designates a new path MTU for a destination
+		 * and the application (associated with this socket) wanted to
+		 * know the value, notify. Note that we notify for all
+		 * disconnected sockets if the corresponding application
+		 * wanted. This is because some UDP applications keep sending
+		 * sockets disconnected.
+		 * XXX: should we avoid to notify the value to TCP sockets?
+		 */
+		if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 &&
+		    (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
+		     IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) {
+			ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst,
+					(u_int32_t *)cmdarg);
+		}
+
+		/*
+		 * Detect if we should notify the error. If no source and
+		 * destination ports are specifed, but non-zero flowinfo and
+		 * local address match, notify the error. This is the case
+		 * when the error is delivered with an encrypted buffer
+		 * by ESP. Otherwise, just compare addresses and ports
+		 * as usual.
+		 */
+		if (lport == 0 && fport == 0 && flowinfo &&
+		    inp->inp_socket != NULL &&
+		    flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) &&
+		    IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
+			goto do_notify;
+		else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
+					     &sa6_dst->sin6_addr) ||
+			 inp->inp_socket == 0 ||
+			 (lport && inp->inp_lport != lport) ||
+			 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
+			  !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
+					      &sa6_src.sin6_addr)) ||
+			 (fport && inp->inp_fport != fport)) {
+			INP_WUNLOCK(inp);
+			continue;
+		}
+
+	  do_notify:
+		if (notify) {
+			if ((*notify)(inp, errno))
+				INP_WUNLOCK(inp);
+		} else
+			INP_WUNLOCK(inp);
+	}
+	INP_INFO_WUNLOCK(pcbinfo);
+}
+
+/*
+ * Lookup a PCB based on the local address and port.
+ */
+struct inpcb *
+in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
+    u_short lport, int wild_okay, struct ucred *cred)
+{
+	register struct inpcb *inp;
+	int matchwild = 3, wildcard;
+
+	INP_INFO_WLOCK_ASSERT(pcbinfo);
+
+	if (!wild_okay) {
+		struct inpcbhead *head;
+		/*
+		 * Look for an unconnected (wildcard foreign addr) PCB that
+		 * matches the local address and port we're looking for.
+		 */
+		head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
+		    0, pcbinfo->ipi_hashmask)];
+		LIST_FOREACH(inp, head, inp_hash) {
+			/* XXX inp locking */
+			if ((inp->inp_vflag & INP_IPV6) == 0)
+				continue;
+			if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
+			    IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
+			    inp->inp_lport == lport) {
+				/* Found. */
+				if (cred == NULL ||
+				    prison_equal_ip6(cred->cr_prison,
+					inp->inp_cred->cr_prison))
+					return (inp);
+			}
+		}
+		/*
+		 * Not found.
+		 */
+		return (NULL);
+	} else {
+		struct inpcbporthead *porthash;
+		struct inpcbport *phd;
+		struct inpcb *match = NULL;
+		/*
+		 * Best fit PCB lookup.
+		 *
+		 * First see if this local port is in use by looking on the
+		 * port hash list.
+		 */
+		porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
+		    pcbinfo->ipi_porthashmask)];
+		LIST_FOREACH(phd, porthash, phd_hash) {
+			if (phd->phd_port == lport)
+				break;
+		}
+		if (phd != NULL) {
+			/*
+			 * Port is in use by one or more PCBs. Look for best
+			 * fit.
+			 */
+			LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
+				wildcard = 0;
+				if (cred != NULL &&
+				    !prison_equal_ip6(cred->cr_prison,
+					inp->inp_cred->cr_prison))
+					continue;
+				/* XXX inp locking */
+				if ((inp->inp_vflag & INP_IPV6) == 0)
+					continue;
+				if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
+					wildcard++;
+				if (!IN6_IS_ADDR_UNSPECIFIED(
+					&inp->in6p_laddr)) {
+					if (IN6_IS_ADDR_UNSPECIFIED(laddr))
+						wildcard++;
+					else if (!IN6_ARE_ADDR_EQUAL(
+					    &inp->in6p_laddr, laddr))
+						continue;
+				} else {
+					if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
+						wildcard++;
+				}
+				if (wildcard < matchwild) {
+					match = inp;
+					matchwild = wildcard;
+					if (matchwild == 0)
+						break;
+				}
+			}
+		}
+		return (match);
+	}
+}
+
+void
+in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
+{
+	struct inpcb *in6p;
+	struct ip6_moptions *im6o;
+	int i, gap;
+
+	INP_INFO_RLOCK(pcbinfo);
+	LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) {
+		INP_WLOCK(in6p);
+		im6o = in6p->in6p_moptions;
+		if ((in6p->inp_vflag & INP_IPV6) && im6o != NULL) {
+			/*
+			 * Unselect the outgoing ifp for multicast if it
+			 * is being detached.
+			 */
+			if (im6o->im6o_multicast_ifp == ifp)
+				im6o->im6o_multicast_ifp = NULL;
+			/*
+			 * Drop multicast group membership if we joined
+			 * through the interface being detached.
+			 */
+			gap = 0;
+			for (i = 0; i < im6o->im6o_num_memberships; i++) {
+				if (im6o->im6o_membership[i]->in6m_ifp ==
+				    ifp) {
+					in6_mc_leave(im6o->im6o_membership[i],
+					    NULL);
+					gap++;
+				} else if (gap != 0) {
+					im6o->im6o_membership[i - gap] =
+					    im6o->im6o_membership[i];
+				}
+			}
+			im6o->im6o_num_memberships -= gap;
+		}
+		INP_WUNLOCK(in6p);
+	}
+	INP_INFO_RUNLOCK(pcbinfo);
+}
+
+/*
+ * Check for alternatives when higher level complains
+ * about service problems.  For now, invalidate cached
+ * routing information.  If the route was created dynamically
+ * (by a redirect), time to try a default gateway again.
+ */
+void
+in6_losing(struct inpcb *in6p)
+{
+
+	/*
+	 * We don't store route pointers in the routing table anymore
+	 */
+	return;
+}
+
+/*
+ * After a routing change, flush old routing
+ * and allocate a (hopefully) better one.
+ */
+struct inpcb *
+in6_rtchange(struct inpcb *inp, int errno)
+{
+	/*
+	 * We don't store route pointers in the routing table anymore
+	 */
+	return inp;
+}
+
+/*
+ * Lookup PCB in hash list.
+ */
+struct inpcb *
+in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
+    u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, int wildcard,
+    struct ifnet *ifp)
+{
+	struct inpcbhead *head;
+	struct inpcb *inp, *tmpinp;
+	u_short fport = fport_arg, lport = lport_arg;
+	int faith;
+
+	INP_INFO_LOCK_ASSERT(pcbinfo);
+
+	if (faithprefix_p != NULL)
+		faith = (*faithprefix_p)(laddr);
+	else
+		faith = 0;
+
+	/*
+	 * First look for an exact match.
+	 */
+	tmpinp = NULL;
+	head = &pcbinfo->ipi_hashbase[
+	    INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport,
+	    pcbinfo->ipi_hashmask)];
+	LIST_FOREACH(inp, head, inp_hash) {
+		/* XXX inp locking */
+		if ((inp->inp_vflag & INP_IPV6) == 0)
+			continue;
+		if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
+		    IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
+		    inp->inp_fport == fport &&
+		    inp->inp_lport == lport) {
+			/*
+			 * XXX We should be able to directly return
+			 * the inp here, without any checks.
+			 * Well unless both bound with SO_REUSEPORT?
+			 */
+			if (prison_flag(inp->inp_cred, PR_IP6))
+				return (inp);
+			if (tmpinp == NULL)
+				tmpinp = inp;
+		}
+	}
+	if (tmpinp != NULL)
+		return (tmpinp);
+
+	/*
+	 * Then look for a wildcard match, if requested.
+	 */
+	if (wildcard == INPLOOKUP_WILDCARD) {
+		struct inpcb *local_wild = NULL, *local_exact = NULL;
+		struct inpcb *jail_wild = NULL;
+		int injail;
+
+		/*
+		 * Order of socket selection - we always prefer jails.
+		 *      1. jailed, non-wild.
+		 *      2. jailed, wild.
+		 *      3. non-jailed, non-wild.
+		 *      4. non-jailed, wild.
+		 */
+		head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
+		    0, pcbinfo->ipi_hashmask)];
+		LIST_FOREACH(inp, head, inp_hash) {
+			/* XXX inp locking */
+			if ((inp->inp_vflag & INP_IPV6) == 0)
+				continue;
+
+			if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
+			    inp->inp_lport != lport) {
+				continue;
+			}
+
+			/* XXX inp locking */
+			if (faith && (inp->inp_flags & INP_FAITH) == 0)
+				continue;
+
+			injail = prison_flag(inp->inp_cred, PR_IP6);
+			if (injail) {
+				if (prison_check_ip6(inp->inp_cred,
+				    laddr) != 0)
+					continue;
+			} else {
+				if (local_exact != NULL)
+					continue;
+			}
+
+			if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
+				if (injail)
+					return (inp);
+				else
+					local_exact = inp;
+			} else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
+				if (injail)
+					jail_wild = inp;
+				else
+					local_wild = inp;
+			}
+		} /* LIST_FOREACH */
+
+		if (jail_wild != NULL)
+			return (jail_wild);
+		if (local_exact != NULL)
+			return (local_exact);
+		if (local_wild != NULL)
+			return (local_wild);
+	} /* if (wildcard == INPLOOKUP_WILDCARD) */
+
+	/*
+	 * Not found.
+	 */
+	return (NULL);
+}
+
+void
+init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
+{
+	struct ip6_hdr *ip;
+
+	ip = mtod(m, struct ip6_hdr *);
+	bzero(sin6, sizeof(*sin6));
+	sin6->sin6_len = sizeof(*sin6);
+	sin6->sin6_family = AF_INET6;
+	sin6->sin6_addr = ip->ip6_src;
+
+	(void)sa6_recoverscope(sin6); /* XXX: should catch errors... */
+
+	return;
+}