/*
- * Copyright (c) 2003-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2003-2013 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the
- * License may not be used to create, or enable the creation or
- * redistribution of, unlawful or unlicensed copies of an Apple operating
- * system, or to circumvent, violate, or enable the circumvention or
- * violation of, any terms of an Apple operating system software license
- * agreement.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
*
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
* limitations under the License.
*
- * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/proc.h>
+#include <sys/kauth.h>
+#include <sys/priv.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/route.h>
+#include <net/ntstat.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/in_pcb.h>
#include <netinet6/in6_pcb.h>
#include <net/if_types.h>
+#include <net/if_var.h>
#include <kern/kern_types.h>
#include <kern/zalloc.h>
-#include "faith.h"
-#if defined(NFAITH) && NFAITH > 0
-#include <net/if_faith.h>
-#endif
-
#if IPSEC
#include <netinet6/ipsec.h>
#if INET6
#include <netinet6/ah6.h>
#endif
#include <netkey/key.h>
-extern lck_mtx_t *sadb_mutex;
#endif /* IPSEC */
-struct in6_addr zeroin6_addr;
+#if NECP
+#include <net/necp.h>
+#endif /* NECP */
+
+/*
+ * in6_pcblookup_local_and_cleanup does everything
+ * in6_pcblookup_local does but it checks for a socket
+ * that's going away. Since we know that the lock is
+ * held read+write when this function is called, we
+ * can safely dispose of this socket like the slow
+ * timer would usually do and return NULL. This is
+ * great for bind.
+ */
+static struct inpcb *
+in6_pcblookup_local_and_cleanup(struct inpcbinfo *pcbinfo,
+ struct in6_addr *laddr, u_int lport_arg, int wild_okay)
+{
+ struct inpcb *inp;
+
+ /* Perform normal lookup */
+ inp = in6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay);
+
+ /* Check if we found a match but it's waiting to be disposed */
+ if (inp != NULL && inp->inp_wantcnt == WNT_STOPUSING) {
+ struct socket *so = inp->inp_socket;
+
+ lck_mtx_lock(&inp->inpcb_mtx);
+ if (so->so_usecount == 0) {
+ if (inp->inp_state != INPCB_STATE_DEAD)
+ in6_pcbdetach(inp);
+ in_pcbdispose(inp); /* will unlock & destroy */
+ inp = NULL;
+ } else {
+ lck_mtx_unlock(&inp->inpcb_mtx);
+ }
+ }
+
+ return (inp);
+}
+
+/*
+ * Bind an INPCB to an address and/or port. This routine should not alter
+ * the caller-supplied local address "nam".
+ */
int
-in6_pcbbind(
- struct inpcb *inp,
- struct sockaddr *nam,
- struct proc *p)
+in6_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct proc *p)
{
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 wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
+ struct ifnet *outif = NULL;
+ struct sockaddr_in6 sin6;
+ int error;
+ kauth_cred_t cred;
if (!in6_ifaddrs) /* 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)
+ return (EINVAL);
+ if (!(so->so_options & (SO_REUSEADDR|SO_REUSEPORT)))
wild = 1;
+
socket_unlock(so, 0); /* keep reference */
- lck_rw_lock_exclusive(pcbinfo->mtx);
- if (nam) {
- sin6 = (struct sockaddr_in6 *)nam;
- if (nam->sa_len != sizeof(*sin6)) {
- lck_rw_done(pcbinfo->mtx);
+ lck_rw_lock_exclusive(pcbinfo->ipi_lock);
+
+ bzero(&sin6, sizeof (sin6));
+ if (nam != NULL) {
+ if (nam->sa_len != sizeof (struct sockaddr_in6)) {
+ lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
- return(EINVAL);
+ return (EINVAL);
}
/*
* family check.
*/
if (nam->sa_family != AF_INET6) {
- lck_rw_done(pcbinfo->mtx);
+ lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
- return(EAFNOSUPPORT);
+ return (EAFNOSUPPORT);
}
+ lport = SIN6(nam)->sin6_port;
+
+ *(&sin6) = *SIN6(nam);
/* KAME hack: embed scopeid */
- if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0) {
- lck_rw_done(pcbinfo->mtx);
+ if (in6_embedscope(&sin6.sin6_addr, &sin6, inp, NULL,
+ NULL) != 0) {
+ lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
- return EINVAL;
+ return (EINVAL);
}
- /* this must be cleared for ifa_ifwithaddr() */
- sin6->sin6_scope_id = 0;
- lport = sin6->sin6_port;
- if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
+ /* Sanitize local copy for address searches */
+ sin6.sin6_flowinfo = 0;
+ sin6.sin6_scope_id = 0;
+ sin6.sin6_port = 0;
+
+ if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
/*
* Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
* allow compepte duplication of binding if
*/
if (so->so_options & SO_REUSEADDR)
reuseport = SO_REUSEADDR|SO_REUSEPORT;
- } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
- struct ifaddr *ia = NULL;
+ } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) {
+ struct ifaddr *ifa;
- sin6->sin6_port = 0; /* yech... */
- if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) {
- lck_rw_done(pcbinfo->mtx);
+ ifa = ifa_ifwithaddr(SA(&sin6));
+ if (ifa == NULL) {
+ lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 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 dare to use it.
- */
- if (ia &&
- ((struct in6_ifaddr *)ia)->ia6_flags &
- (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
- ifafree(ia);
- lck_rw_done(pcbinfo->mtx);
- socket_lock(so, 0);
- return(EADDRNOTAVAIL);
+ return (EADDRNOTAVAIL);
+ } else {
+ /*
+ * 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 dare to use it.
+ */
+ IFA_LOCK_SPIN(ifa);
+ if (((struct in6_ifaddr *)ifa)->ia6_flags &
+ (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
+ IN6_IFF_DETACHED)) {
+ IFA_UNLOCK(ifa);
+ IFA_REMREF(ifa);
+ lck_rw_done(pcbinfo->ipi_lock);
+ socket_lock(so, 0);
+ return (EADDRNOTAVAIL);
+ }
+ /*
+ * Opportunistically determine the outbound
+ * interface that may be used; this may not
+ * hold true if we end up using a route
+ * going over a different interface, e.g.
+ * when sending to a local address. This
+ * will get updated again after sending.
+ */
+ outif = ifa->ifa_ifp;
+ IFA_UNLOCK(ifa);
+ IFA_REMREF(ifa);
}
- ifafree(ia);
- ia = NULL;
}
- if (lport) {
+ if (lport != 0) {
struct inpcb *t;
+ uid_t u;
/* GROSS */
- if (ntohs(lport) < IPV6PORT_RESERVED && p &&
- ((so->so_state & SS_PRIV) == 0)) {
- lck_rw_done(pcbinfo->mtx);
- socket_lock(so, 0);
- return(EACCES);
+ if (ntohs(lport) < IPV6PORT_RESERVED) {
+ cred = kauth_cred_proc_ref(p);
+ error = priv_check_cred(cred,
+ PRIV_NETINET_RESERVEDPORT, 0);
+ kauth_cred_unref(&cred);
+ if (error != 0) {
+ lck_rw_done(pcbinfo->ipi_lock);
+ socket_lock(so, 0);
+ return (EACCES);
+ }
}
-
- if (so->so_uid &&
- !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
- t = in6_pcblookup_local(pcbinfo,
- &sin6->sin6_addr, lport,
+ if (!IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr) &&
+ (u = kauth_cred_getuid(so->so_cred)) != 0) {
+ t = in6_pcblookup_local_and_cleanup(pcbinfo,
+ &sin6.sin6_addr, lport,
INPLOOKUP_WILDCARD);
- if (t &&
- (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
- !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
- (t->inp_socket->so_options &
- SO_REUSEPORT) == 0) &&
- so->so_uid != t->inp_socket->so_uid) {
- lck_rw_done(pcbinfo->mtx);
+ if (t != NULL && (!IN6_IS_ADDR_UNSPECIFIED(
+ &sin6.sin6_addr) ||
+ !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
+ !(t->inp_socket->so_options &
+ SO_REUSEPORT)) && (u != kauth_cred_getuid(
+ t->inp_socket->so_cred)) &&
+ !(t->inp_socket->so_flags &
+ SOF_REUSESHAREUID)) {
+ lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return (EADDRINUSE);
}
- if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
- IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
+ if (!(inp->inp_flags & IN6P_IPV6_V6ONLY) &&
+ 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);
- if (t &&
- (so->so_uid !=
- t->inp_socket->so_uid) &&
- (ntohl(t->inp_laddr.s_addr) !=
- INADDR_ANY ||
- INP_SOCKAF(so) ==
- INP_SOCKAF(t->inp_socket))) {
-
- lck_rw_done(pcbinfo->mtx);
+ in6_sin6_2_sin(&sin, &sin6);
+ t = in_pcblookup_local_and_cleanup(
+ pcbinfo, sin.sin_addr, lport,
+ INPLOOKUP_WILDCARD);
+ if (t != NULL &&
+ !(t->inp_socket->so_options &
+ SO_REUSEPORT) &&
+ (kauth_cred_getuid(so->so_cred) !=
+ kauth_cred_getuid(t->inp_socket->
+ so_cred)) && (t->inp_laddr.s_addr !=
+ INADDR_ANY || SOCK_DOM(so) ==
+ SOCK_DOM(t->inp_socket))) {
+ lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return (EADDRINUSE);
}
}
}
- t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
- lport, wild);
- if (t && (reuseport & t->inp_socket->so_options) == 0) {
- lck_rw_done(pcbinfo->mtx);
+ t = in6_pcblookup_local_and_cleanup(pcbinfo,
+ &sin6.sin6_addr, lport, wild);
+ if (t != NULL &&
+ (reuseport & t->inp_socket->so_options) == 0) {
+ lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
- return(EADDRINUSE);
+ return (EADDRINUSE);
}
- if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
- IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
+ if (!(inp->inp_flags & IN6P_IPV6_V6ONLY) &&
+ 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);
- 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))) {
- lck_rw_done(pcbinfo->mtx);
+ in6_sin6_2_sin(&sin, &sin6);
+ t = in_pcblookup_local_and_cleanup(pcbinfo,
+ sin.sin_addr, lport, wild);
+ if (t != NULL && (reuseport &
+ t->inp_socket->so_options) == 0 &&
+ (t->inp_laddr.s_addr != INADDR_ANY ||
+ SOCK_DOM(so) == SOCK_DOM(t->inp_socket))) {
+ lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return (EADDRINUSE);
}
}
}
- inp->in6p_laddr = sin6->sin6_addr;
}
+
socket_lock(so, 0);
+ /*
+ * We unlocked socket's protocol lock for a long time.
+ * The socket might have been dropped/defuncted.
+ * Checking if world has changed since.
+ */
+ if (inp->inp_state == INPCB_STATE_DEAD) {
+ lck_rw_done(pcbinfo->ipi_lock);
+ return (ECONNABORTED);
+ }
+
+ /* check if the socket got bound when the lock was released */
+ if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
+ lck_rw_done(pcbinfo->ipi_lock);
+ return (EINVAL);
+ }
+
+ if (!IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) {
+ inp->in6p_laddr = sin6.sin6_addr;
+ inp->in6p_last_outifp = outif;
+ }
+
if (lport == 0) {
int e;
if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, p, 1)) != 0) {
- lck_rw_done(pcbinfo->mtx);
- return(e);
+ /* Undo any address bind from above. */
+ inp->in6p_laddr = in6addr_any;
+ inp->in6p_last_outifp = NULL;
+ lck_rw_done(pcbinfo->ipi_lock);
+ return (e);
}
- }
- else {
+ } else {
inp->inp_lport = lport;
if (in_pcbinshash(inp, 1) != 0) {
inp->in6p_laddr = in6addr_any;
inp->inp_lport = 0;
- lck_rw_done(pcbinfo->mtx);
+ inp->in6p_last_outifp = NULL;
+ lck_rw_done(pcbinfo->ipi_lock);
return (EAGAIN);
}
- }
- lck_rw_done(pcbinfo->mtx);
- return(0);
+ }
+ lck_rw_done(pcbinfo->ipi_lock);
+ sflt_notify(so, sock_evt_bound, NULL);
+ 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.
+ * Transform old in6_pcbconnect() into an inner subroutine for new
+ * in6_pcbconnect(); do some validity-checking on the remote address
+ * (in "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).
+ * This routine may alter the caller-supplied remote address "nam".
+ *
+ * This routine might return an ifp with a reference held if the caller
+ * provides a non-NULL outif, even in the error case. The caller is
+ * responsible for releasing its reference.
*/
-
int
-in6_pcbladdr(
- struct inpcb *inp,
- struct sockaddr *nam,
- struct in6_addr *plocal_addr6)
+in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
+ struct in6_addr *plocal_addr6, struct ifnet **outif)
{
- struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
struct in6_addr *addr6 = NULL;
struct in6_addr src_storage;
-
- struct ifnet *ifp = NULL;
int error = 0;
+ unsigned int ifscope;
- if (nam->sa_len != sizeof (*sin6))
+ if (outif != NULL)
+ *outif = NULL;
+ if (nam->sa_len != sizeof (struct sockaddr_in6))
return (EINVAL);
- if (sin6->sin6_family != AF_INET6)
+ if (SIN6(nam)->sin6_family != AF_INET6)
return (EAFNOSUPPORT);
- if (sin6->sin6_port == 0)
+ if (SIN6(nam)->sin6_port == 0)
return (EADDRNOTAVAIL);
/* KAME hack: embed scopeid */
- if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0)
- return EINVAL;
+ if (in6_embedscope(&SIN6(nam)->sin6_addr, SIN6(nam), inp, NULL, NULL) != 0)
+ return (EINVAL);
if (in6_ifaddrs) {
/*
* 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 (IN6_IS_ADDR_UNSPECIFIED(&SIN6(nam)->sin6_addr))
+ SIN6(nam)->sin6_addr = in6addr_loopback;
}
- {
+
+ ifscope = (inp->inp_flags & INP_BOUND_IF) ?
+ inp->inp_boundifp->if_index : IFSCOPE_NONE;
+
+ /*
+ * XXX: in6_selectsrc might replace the bound local address
+ * with the address specified by setsockopt(IPV6_PKTINFO).
+ * Is it the intended behavior?
+ *
+ * in6_selectsrc() might return outif with its reference held
+ * even in the error case; caller always needs to release it
+ * if non-NULL.
+ */
+ addr6 = in6_selectsrc(SIN6(nam), inp->in6p_outputopts, inp,
+ &inp->in6p_route, outif, &src_storage, ifscope, &error);
+
+ if (outif != NULL) {
+ struct rtentry *rt = inp->in6p_route.ro_rt;
/*
- * XXX: in6_selectsrc might replace the bound local address
- * with the address specified by setsockopt(IPV6_PKTINFO).
- * Is it the intended behavior?
+ * If in6_selectsrc() returns a route, it should be one
+ * which points to the same ifp as outif. Just in case
+ * it isn't, use the one from the route for consistency.
+ * Otherwise if there is no route, leave outif alone as
+ * it could still be useful to the caller.
*/
- addr6 = in6_selectsrc(sin6, inp->in6p_outputopts,
- inp->in6p_moptions,
- &inp->in6p_route,
- &inp->in6p_laddr, &src_storage, &error);
- if (addr6 == 0) {
- if (error == 0)
- error = EADDRNOTAVAIL;
- return(error);
+ if (rt != NULL && rt->rt_ifp != *outif) {
+ ifnet_reference(rt->rt_ifp); /* for caller */
+ if (*outif != NULL)
+ ifnet_release(*outif);
+ *outif = rt->rt_ifp;
}
- *plocal_addr6 = *addr6;
- /*
- * Don't do pcblookup call here; return interface in
- * plocal_addr6
- * and exit to caller, that will do the lookup.
- */
}
- if (inp->in6p_route.ro_rt)
- ifp = inp->in6p_route.ro_rt->rt_ifp;
+ if (addr6 == NULL) {
+ if (outif != NULL && (*outif) != NULL &&
+ inp_restricted_send(inp, *outif)) {
+ soevent(inp->inp_socket,
+ (SO_FILT_HINT_LOCKED | SO_FILT_HINT_IFDENIED));
+ error = EHOSTUNREACH;
+ }
+ if (error == 0)
+ error = EADDRNOTAVAIL;
+ return (error);
+ }
- return(0);
+ *plocal_addr6 = *addr6;
+ /*
+ * Don't do pcblookup call here; return interface in
+ * plocal_addr6 and exit to caller, that will do the lookup.
+ */
+ return (0);
}
/*
* then pick one.
*/
int
-in6_pcbconnect(inp, nam, p)
- struct inpcb *inp;
- struct sockaddr *nam;
- struct proc *p;
+in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct proc *p)
{
struct in6_addr addr6;
- struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)(void *)nam;
struct inpcb *pcb;
- int error;
+ int error = 0;
+ struct ifnet *outif = NULL;
+ struct socket *so = inp->inp_socket;
/*
* Call inner routine, to assign local interface address.
* in6_pcbladdr() may automatically fill in sin6_scope_id.
+ *
+ * in6_pcbladdr() might return an ifp with its reference held
+ * even in the error case, so make sure that it's released
+ * whenever it's non-NULL.
*/
- if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
- return(error);
- socket_unlock(inp->inp_socket, 0);
+ if ((error = in6_pcbladdr(inp, nam, &addr6, &outif)) != 0) {
+ if (outif != NULL && inp_restricted_send(inp, outif))
+ soevent(so,
+ (SO_FILT_HINT_LOCKED | SO_FILT_HINT_IFDENIED));
+ goto done;
+ }
+ socket_unlock(so, 0);
pcb = 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);
- socket_lock(inp->inp_socket, 0);
+ sin6->sin6_port, IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) ?
+ &addr6 : &inp->in6p_laddr, inp->inp_lport, 0, NULL);
+ socket_lock(so, 0);
if (pcb != NULL) {
- in_pcb_checkstate(pcb, WNT_RELEASE, 0);
- return (EADDRINUSE);
+ in_pcb_checkstate(pcb, WNT_RELEASE, pcb == inp ? 1 : 0);
+ error = EADDRINUSE;
+ goto done;
}
if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
if (inp->inp_lport == 0) {
- error = in6_pcbbind(inp, (struct sockaddr *)0, p);
+ error = in6_pcbbind(inp, NULL, p);
if (error)
- return (error);
+ goto done;
}
inp->in6p_laddr = addr6;
+ inp->in6p_last_outifp = outif; /* no reference needed */
+ inp->in6p_flags |= INP_IN6ADDR_ANY;
}
- if (!lck_rw_try_lock_exclusive(inp->inp_pcbinfo->mtx)) {
- /*lock inversion issue, mostly with udp multicast packets */
- socket_unlock(inp->inp_socket, 0);
- lck_rw_lock_exclusive(inp->inp_pcbinfo->mtx);
- socket_lock(inp->inp_socket, 0);
+ if (!lck_rw_try_lock_exclusive(inp->inp_pcbinfo->ipi_lock)) {
+ /* lock inversion issue, mostly with udp multicast packets */
+ socket_unlock(so, 0);
+ lck_rw_lock_exclusive(inp->inp_pcbinfo->ipi_lock);
+ socket_lock(so, 0);
}
inp->in6p_faddr = sin6->sin6_addr;
inp->inp_fport = sin6->sin6_port;
- /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
- inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
- if (inp->in6p_flags & IN6P_AUTOFLOWLABEL)
- inp->in6p_flowinfo |=
- (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK);
-
+ if (nstat_collect && SOCK_PROTO(so) == IPPROTO_UDP)
+ nstat_pcb_invalidate_cache(inp);
in_pcbrehash(inp);
- lck_rw_done(inp->inp_pcbinfo->mtx);
- return (0);
-}
-
-#if 0
-/*
- * Return an IPv6 address, which is the most appropriate for given
- * destination and user specified options.
- * If necessary, this function lookups the routing table and return
- * an entry to the caller for later use.
- */
-struct in6_addr *
-in6_selectsrc(
- struct sockaddr_in6 *dstsock,
- struct ip6_pktopts *opts,
- struct ip6_moptions *mopts,
- struct route_in6 *ro,
- struct in6_addr *laddr,
- struct in6_addr *src_storage,
- int *errorp)
-{
- struct in6_addr *dst;
- struct in6_ifaddr *ia6 = 0;
- struct in6_pktinfo *pi = NULL;
-
- dst = &dstsock->sin6_addr;
- *errorp = 0;
-
- /*
- * If the source address is explicitly specified by the caller,
- * use it.
- */
- if (opts && (pi = opts->ip6po_pktinfo) &&
- !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr))
- return(&pi->ipi6_addr);
-
- /*
- * If the source address is not specified but the socket(if any)
- * is already bound, use the bound address.
- */
- if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr))
- return(laddr);
-
- /*
- * If the caller doesn't specify the source address but
- * the outgoing interface, use an address associated with
- * the interface.
- */
- if (pi && pi->ipi6_ifindex) {
- /* XXX boundary check is assumed to be already done. */
- ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex],
- dst);
- if (ia6 == 0) {
- *errorp = EADDRNOTAVAIL;
- return(0);
- }
- *src_storage = satosin6(&ia6->ia_addr)->sin6_addr;
- ifafree(&ia6->ia_ifa);
- return(src_storage);
- }
-
- /*
- * If the destination address is a link-local unicast address or
- * a multicast address, and if the outgoing interface is specified
- * by the sin6_scope_id filed, use an address associated with the
- * interface.
- * XXX: We're now trying to define more specific semantics of
- * sin6_scope_id field, so this part will be rewritten in
- * the near future.
- */
- if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) &&
- dstsock->sin6_scope_id) {
- /*
- * I'm not sure if boundary check for scope_id is done
- * somewhere...
- */
- if (dstsock->sin6_scope_id < 0 ||
- if_index < dstsock->sin6_scope_id) {
- *errorp = ENXIO; /* XXX: better error? */
- return(0);
- }
- ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id],
- dst);
- if (ia6 == 0) {
- *errorp = EADDRNOTAVAIL;
- return(0);
- }
- *src_storage = satosin6(&ia6->ia_addr)->sin6_addr;
- ifafree(&ia6->ia_ifa);
- return(src_storage);
- }
-
- /*
- * If the destination address is a multicast address and
- * the outgoing interface for the address is specified
- * by the caller, use an address associated with the interface.
- * There is a sanity check here; if the destination has node-local
- * scope, the outgoing interfacde should be a loopback address.
- * Even if the outgoing interface is not specified, we also
- * choose a loopback interface as the outgoing interface.
- */
- if (IN6_IS_ADDR_MULTICAST(dst)) {
- struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL;
-
- if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) {
- ifp = &loif[0];
- }
-
- if (ifp) {
- ia6 = in6_ifawithscope(ifp, dst);
- if (ia6 == 0) {
- *errorp = EADDRNOTAVAIL;
- return(0);
- }
- *src_storage = ia6->ia_addr.sin6_addr;
- ifafree(&ia6->ia_ifa);
- return(src_storage);
- }
- }
-
- /*
- * If the next hop address for the packet is specified
- * by caller, use an address associated with the route
- * to the next hop.
- */
- {
- struct sockaddr_in6 *sin6_next;
- struct rtentry *rt;
-
- if (opts && opts->ip6po_nexthop) {
- sin6_next = satosin6(opts->ip6po_nexthop);
- rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL, 0);
- if (rt) {
- ia6 = in6_ifawithscope(rt->rt_ifp, dst);
- if (ia6 == 0) {
- ifaref(&rt->rt_ifa);
- ia6 = ifatoia6(rt->rt_ifa);
- }
- }
- if (ia6 == 0) {
- *errorp = EADDRNOTAVAIL;
- return(0);
- }
- *src_storage = satosin6(&ia6->ia_addr)->sin6_addr;
- ifaref(&rt->rt_ifa);
- return(src_storage);
- }
- }
-
- /*
- * If route is known or can be allocated now,
- * our src addr is taken from the i/f, else punt.
- */
- if (ro) {
- if (ro->ro_rt &&
- !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) {
- rtfree(ro->ro_rt);
- ro->ro_rt = (struct rtentry *)0;
- }
- if (ro->ro_rt == (struct rtentry *)0 ||
- ro->ro_rt->rt_ifp == (struct ifnet *)0) {
- struct sockaddr_in6 *dst6;
-
- /* No route yet, so try to acquire one */
- bzero(&ro->ro_dst, sizeof(struct sockaddr_in6));
- dst6 = (struct sockaddr_in6 *)&ro->ro_dst;
- dst6->sin6_family = AF_INET6;
- dst6->sin6_len = sizeof(struct sockaddr_in6);
- dst6->sin6_addr = *dst;
- if (IN6_IS_ADDR_MULTICAST(dst)) {
- ro->ro_rt = rtalloc1(&((struct route *)ro)
- ->ro_dst, 0, 0UL);
- } else {
- rtalloc((struct route *)ro);
- }
- }
-
- /*
- * in_pcbconnect() checks out IFF_LOOPBACK to skip using
- * the address. But we don't know why it does so.
- * It is necessary to ensure the scope even for lo0
- * so doesn't check out IFF_LOOPBACK.
- */
+ lck_rw_done(inp->inp_pcbinfo->ipi_lock);
- if (ro->ro_rt) {
- ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst);
- if (ia6 == 0) { /* xxx scope error ?*/
- ifaref(ro->ro_rt->rt_ifa);
- ia6 = ifatoia6(ro->ro_rt->rt_ifa);
- }
- }
- if (ia6 == 0) {
- *errorp = EHOSTUNREACH; /* no route */
- return(0);
- }
- *src_storage = satosin6(&ia6->ia_addr)->sin6_addr;
- ifaref(&rt->rt_ifa);
- return(src_storage);
- }
+done:
+ if (outif != NULL)
+ ifnet_release(outif);
- *errorp = EADDRNOTAVAIL;
- return(0);
+ return (error);
}
-/*
- * Default hop limit selection. The precedence is as follows:
- * 1. Hoplimit valued specified via ioctl.
- * 2. (If the outgoing interface is detected) the current
- * hop limit of the interface specified by router advertisement.
- * 3. The system default hoplimit.
-*/
-int
-in6_selecthlim(
- struct in6pcb *in6p,
- struct ifnet *ifp)
-{
- if (in6p && in6p->in6p_hops >= 0)
- return(in6p->in6p_hops);
- else if (ifp)
- return(nd_ifinfo[ifp->if_index].chlim);
- else
- return(ip6_defhlim);
-}
-#endif
-
void
-in6_pcbdisconnect(inp)
- struct inpcb *inp;
+in6_pcbdisconnect(struct inpcb *inp)
{
- if (!lck_rw_try_lock_exclusive(inp->inp_pcbinfo->mtx)) {
- /*lock inversion issue, mostly with udp multicast packets */
- socket_unlock(inp->inp_socket, 0);
- lck_rw_lock_exclusive(inp->inp_pcbinfo->mtx);
- socket_lock(inp->inp_socket, 0);
+ struct socket *so = inp->inp_socket;
+
+ if (!lck_rw_try_lock_exclusive(inp->inp_pcbinfo->ipi_lock)) {
+ /* lock inversion issue, mostly with udp multicast packets */
+ socket_unlock(so, 0);
+ lck_rw_lock_exclusive(inp->inp_pcbinfo->ipi_lock);
+ socket_lock(so, 0);
}
- bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
+ if (nstat_collect && SOCK_PROTO(so) == IPPROTO_UDP)
+ nstat_pcb_cache(inp);
+ bzero((caddr_t)&inp->in6p_faddr, sizeof (inp->in6p_faddr));
inp->inp_fport = 0;
- /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
- inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
+ /* clear flowinfo - RFC 6437 */
+ inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
in_pcbrehash(inp);
- lck_rw_done(inp->inp_pcbinfo->mtx);
- if (inp->inp_socket->so_state & SS_NOFDREF)
+ lck_rw_done(inp->inp_pcbinfo->ipi_lock);
+ /*
+ * A multipath subflow socket would have its SS_NOFDREF set by default,
+ * so check for SOF_MP_SUBFLOW socket flag before detaching the PCB;
+ * when the socket is closed for real, SOF_MP_SUBFLOW would be cleared.
+ */
+ if (!(so->so_flags & SOF_MP_SUBFLOW) && (so->so_state & SS_NOFDREF))
in6_pcbdetach(inp);
}
void
-in6_pcbdetach(inp)
- struct inpcb *inp;
+in6_pcbdetach(struct inpcb *inp)
{
struct socket *so = inp->inp_socket;
- struct inpcbinfo *ipi = inp->inp_pcbinfo;
+ if (so->so_pcb == NULL) {
+ /* PCB has been disposed */
+ panic("%s: inp=%p so=%p proto=%d so_pcb is null!\n", __func__,
+ inp, so, SOCK_PROTO(so));
+ /* NOTREACHED */
+ }
+
#if IPSEC
if (inp->in6p_sp != NULL) {
- lck_mtx_lock(sadb_mutex);
- ipsec6_delete_pcbpolicy(inp);
- lck_mtx_unlock(sadb_mutex);
+ (void) ipsec6_delete_pcbpolicy(inp);
}
#endif /* IPSEC */
- if (in_pcb_checkstate(inp, WNT_STOPUSING, 1) != WNT_STOPUSING)
- printf("in6_pcbdetach so=%x can't be marked dead ok\n", so);
+ /*
+ * Let NetworkStatistics know this PCB is going away
+ * before we detach it.
+ */
+ if (nstat_collect &&
+ (SOCK_PROTO(so) == IPPROTO_TCP || SOCK_PROTO(so) == IPPROTO_UDP))
+ nstat_pcb_detach(inp);
+ /* mark socket state as dead */
+ if (in_pcb_checkstate(inp, WNT_STOPUSING, 1) != WNT_STOPUSING) {
+ panic("%s: so=%p proto=%d couldn't set to STOPUSING\n",
+ __func__, so, SOCK_PROTO(so));
+ /* NOTREACHED */
+ }
- inp->inp_state = INPCB_STATE_DEAD;
+ if (!(so->so_flags & SOF_PCBCLEARING)) {
+ struct ip_moptions *imo;
+ struct ip6_moptions *im6o;
- if ((so->so_flags & SOF_PCBCLEARING) == 0) {
inp->inp_vflag = 0;
- so->so_flags |= SOF_PCBCLEARING;
- inp->inp_gencnt = ++ipi->ipi_gencnt;
- if (inp->in6p_options)
+ if (inp->in6p_options != NULL) {
m_freem(inp->in6p_options);
- ip6_freepcbopts(inp->in6p_outputopts);
- ip6_freemoptions(inp->in6p_moptions);
- if (inp->in6p_route.ro_rt)
- rtfree(inp->in6p_route.ro_rt);
- /* Check and free IPv4 related resources in case of mapped addr */
- if (inp->inp_options)
- (void)m_free(inp->inp_options);
- ip_freemoptions(inp->inp_moptions);
+ inp->in6p_options = NULL;
+ }
+ ip6_freepcbopts(inp->in6p_outputopts);
+ ROUTE_RELEASE(&inp->in6p_route);
+ /* free IPv4 related resources in case of mapped addr */
+ if (inp->inp_options != NULL) {
+ (void) m_free(inp->inp_options);
+ inp->inp_options = NULL;
+ }
+ im6o = inp->in6p_moptions;
+ inp->in6p_moptions = NULL;
+
+ imo = inp->inp_moptions;
inp->inp_moptions = NULL;
-
+
+ sofreelastref(so, 0);
+ inp->inp_state = INPCB_STATE_DEAD;
+ /* makes sure we're not called twice from so_close */
+ so->so_flags |= SOF_PCBCLEARING;
+
+ inpcb_gc_sched(inp->inp_pcbinfo, INPCB_TIMER_FAST);
+
+ /*
+ * See inp_join_group() for why we need to unlock
+ */
+ if (im6o != NULL || imo != NULL) {
+ socket_unlock(so, 0);
+ if (im6o != NULL)
+ IM6O_REMREF(im6o);
+ if (imo != NULL)
+ IMO_REMREF(imo);
+ socket_lock(so, 0);
+ }
}
}
struct sockaddr *
-in6_sockaddr(port, addr_p)
- in_port_t port;
- struct in6_addr *addr_p;
+in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
{
struct sockaddr_in6 *sin6;
- MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK);
- bzero(sin6, sizeof *sin6);
+ MALLOC(sin6, struct sockaddr_in6 *, sizeof (*sin6), M_SONAME, M_WAITOK);
+ if (sin6 == NULL)
+ return (NULL);
+ bzero(sin6, sizeof (*sin6));
sin6->sin6_family = AF_INET6;
- sin6->sin6_len = sizeof(*sin6);
+ sin6->sin6_len = sizeof (*sin6);
sin6->sin6_port = port;
sin6->sin6_addr = *addr_p;
+
+ /* would be good to use sa6_recoverscope(), except for locking */
if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
else
- sin6->sin6_scope_id = 0; /*XXX*/
+ sin6->sin6_scope_id = 0; /* XXX */
if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
sin6->sin6_addr.s6_addr16[1] = 0;
- return (struct sockaddr *)sin6;
+ return ((struct sockaddr *)sin6);
}
-struct sockaddr *
-in6_v4mapsin6_sockaddr(port, addr_p)
- in_port_t port;
- struct in_addr *addr_p;
+void
+in6_sockaddr_s(in_port_t port, struct in6_addr *addr_p,
+ struct sockaddr_in6 *sin6)
{
- 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;
-
- MALLOC(sin6_p, struct sockaddr_in6 *, sizeof *sin6_p, M_SONAME,
- M_WAITOK);
- in6_sin_2_v4mapsin6(&sin, sin6_p);
+ bzero(sin6, sizeof (*sin6));
+ sin6->sin6_family = AF_INET6;
+ sin6->sin6_len = sizeof (*sin6);
+ sin6->sin6_port = port;
+ sin6->sin6_addr = *addr_p;
- return (struct sockaddr *)sin6_p;
+ /* would be good to use sa6_recoverscope(), except for locking */
+ if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
+ sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
+ else
+ sin6->sin6_scope_id = 0; /* XXX */
+ if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
+ sin6->sin6_addr.s6_addr16[1] = 0;
}
/*
- * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was
+ * The calling convention of in6_getsockaddr() and in6_getpeeraddr() was
* modified to match the pru_sockaddr() and pru_peeraddr() entry points
* in struct pr_usrreqs, so that protocols can just reference then directly
- * without the need for a wrapper function. The socket must have a valid
- * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
- * except through a kernel programming error, so it is acceptable to panic
- * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
- * because there actually /is/ a programming error somewhere... XXX)
+ * without the need for a wrapper function.
*/
int
-in6_setsockaddr(so, nam)
- struct socket *so;
- struct sockaddr **nam;
+in6_getsockaddr(struct socket *so, struct sockaddr **nam)
{
struct inpcb *inp;
struct in6_addr addr;
in_port_t port;
- inp = sotoinpcb(so);
- if (!inp) {
- return EINVAL;
- }
+ if ((inp = sotoinpcb(so)) == NULL)
+ return (EINVAL);
+
port = inp->inp_lport;
addr = inp->in6p_laddr;
*nam = in6_sockaddr(port, &addr);
- return 0;
+ if (*nam == NULL)
+ return (ENOBUFS);
+ return (0);
}
int
-in6_setpeeraddr(so, nam)
- struct socket *so;
- struct sockaddr **nam;
+in6_getsockaddr_s(struct socket *so, struct sockaddr_storage *ss)
{
struct inpcb *inp;
struct in6_addr addr;
in_port_t port;
- inp = sotoinpcb(so);
- if (!inp) {
- return EINVAL;
- }
+ VERIFY(ss != NULL);
+ bzero(ss, sizeof (*ss));
+
+ if ((inp = sotoinpcb(so)) == NULL
+#if NECP
+ || (necp_socket_should_use_flow_divert(inp))
+#endif /* NECP */
+ )
+ return (inp == NULL ? EINVAL : EPROTOTYPE);
+
+ port = inp->inp_lport;
+ addr = inp->in6p_laddr;
+
+ in6_sockaddr_s(port, &addr, SIN6(ss));
+ return (0);
+}
+
+int
+in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
+{
+ struct inpcb *inp;
+ struct in6_addr addr;
+ in_port_t port;
+
+ if ((inp = sotoinpcb(so)) == NULL)
+ return (EINVAL);
+
port = inp->inp_fport;
addr = inp->in6p_faddr;
*nam = in6_sockaddr(port, &addr);
- return 0;
+ if (*nam == NULL)
+ return (ENOBUFS);
+ return (0);
+}
+
+int
+in6_getpeeraddr_s(struct socket *so, struct sockaddr_storage *ss)
+{
+ struct inpcb *inp;
+ struct in6_addr addr;
+ in_port_t port;
+
+ VERIFY(ss != NULL);
+ bzero(ss, sizeof (*ss));
+
+ if ((inp = sotoinpcb(so)) == NULL
+#if NECP
+ || (necp_socket_should_use_flow_divert(inp))
+#endif /* NECP */
+ )
+ return (inp == NULL ? EINVAL : EPROTOTYPE);
+
+ port = inp->inp_fport;
+ addr = inp->in6p_faddr;
+
+ in6_sockaddr_s(port, &addr, SIN6(ss));
+ return (0);
}
int
int error;
if (inp == NULL)
- return EINVAL;
+ return (EINVAL);
if (inp->inp_vflag & INP_IPV4) {
- error = in_setsockaddr(so, nam);
+ error = in_getsockaddr(so, nam);
if (error == 0)
- in6_sin_2_v4mapsin6_in_sock(nam);
- } else
- /* scope issues will be handled in in6_setsockaddr(). */
- error = in6_setsockaddr(so, nam);
-
- return error;
+ error = in6_sin_2_v4mapsin6_in_sock(nam);
+ } else {
+ /* scope issues will be handled in in6_getsockaddr(). */
+ error = in6_getsockaddr(so, nam);
+ }
+ return (error);
}
int
int error;
if (inp == NULL)
- return EINVAL;
+ return (EINVAL);
if (inp->inp_vflag & INP_IPV4) {
- error = in_setpeeraddr(so, nam);
+ error = in_getpeeraddr(so, nam);
if (error == 0)
- in6_sin_2_v4mapsin6_in_sock(nam);
- } else
- /* scope issues will be handled in in6_setpeeraddr(). */
- error = in6_setpeeraddr(so, nam);
-
- return error;
+ error = in6_sin_2_v4mapsin6_in_sock(nam);
+ } else {
+ /* scope issues will be handled in in6_getpeeraddr(). */
+ error = in6_getpeeraddr(so, nam);
+ }
+ return (error);
}
/*
* 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.
- *
- * Must be called at splnet.
*/
void
-in6_pcbnotify(pcbinfo, dst, fport_arg, src, lport_arg, cmd, notify)
- struct inpcbinfo *pcbinfo;
- struct sockaddr *dst;
- const struct sockaddr *src;
- u_int fport_arg, lport_arg;
- int cmd;
-// struct inpcb *(*notify)(struct inpcb *, int);
- void (*notify)(struct inpcb *, int);
+in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, u_int fport_arg,
+ const struct sockaddr *src, u_int lport_arg, int cmd, void *cmdarg,
+ void (*notify)(struct inpcb *, int))
{
+ struct inpcbhead *head = pcbinfo->ipi_listhead;
struct inpcb *inp, *ninp;
struct sockaddr_in6 sa6_src, *sa6_dst;
u_short fport = fport_arg, lport = lport_arg;
u_int32_t flowinfo;
int errno;
- struct inpcbhead *head = pcbinfo->listhead;
- if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6)
+ if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
return;
- sa6_dst = (struct sockaddr_in6 *)dst;
+ sa6_dst = (struct sockaddr_in6 *)(void *)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;
+ sa6_src = (src == NULL) ?
+ sa6_any : *(struct sockaddr_in6 *)(uintptr_t)(size_t)src;
flowinfo = sa6_src.sin6_flowinfo;
/*
if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
fport = 0;
lport = 0;
- bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
+ bzero((caddr_t)&sa6_src.sin6_addr, sizeof (sa6_src.sin6_addr));
if (cmd != PRC_HOSTDEAD)
notify = in6_rtchange;
}
errno = inet6ctlerrmap[cmd];
- lck_rw_lock_shared(pcbinfo->mtx);
- for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
- ninp = LIST_NEXT(inp, inp_list);
+ lck_rw_lock_shared(pcbinfo->ipi_lock);
+ for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
+ ninp = LIST_NEXT(inp, inp_list);
- if ((inp->inp_vflag & INP_IPV6) == 0)
+ if (!(inp->inp_vflag & INP_IPV6))
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 *)(void *)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
*/
if (lport == 0 && fport == 0 && flowinfo &&
inp->inp_socket != NULL &&
- flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
+ 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))
+ &sa6_dst->sin6_addr) || inp->inp_socket == NULL ||
+ (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))
continue;
-
- do_notify:
+do_notify:
if (notify) {
- if (in_pcb_checkstate(inp, WNT_ACQUIRE, 0) == WNT_STOPUSING)
+ if (in_pcb_checkstate(inp, WNT_ACQUIRE, 0) ==
+ WNT_STOPUSING)
continue;
socket_lock(inp->inp_socket, 1);
(*notify)(inp, errno);
- (void)in_pcb_checkstate(inp, WNT_RELEASE, 1);
+ (void) in_pcb_checkstate(inp, WNT_RELEASE, 1);
socket_unlock(inp->inp_socket, 1);
}
}
- lck_rw_done(pcbinfo->mtx);
+ lck_rw_done(pcbinfo->ipi_lock);
}
/*
* Lookup a PCB based on the local address and port.
*/
struct inpcb *
-in6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay)
- struct inpcbinfo *pcbinfo;
- struct in6_addr *laddr;
- u_int lport_arg;
- int wild_okay;
+in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
+ u_int lport_arg, int wild_okay)
{
struct inpcb *inp;
int matchwild = 3, wildcard;
u_short lport = lport_arg;
+ struct inpcbporthead *porthash;
+ struct inpcb *match = NULL;
+ struct inpcbport *phd;
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->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
- pcbinfo->hashmask)];
+ head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
+ pcbinfo->ipi_hashmask)];
LIST_FOREACH(inp, head, inp_hash) {
- if ((inp->inp_vflag & INP_IPV6) == 0)
+ if (!(inp->inp_vflag & INP_IPV6))
continue;
if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
* 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) {
/*
- * Best fit PCB lookup.
- *
- * First see if this local port is in use by looking on the
- * port hash list.
+ * Port is in use by one or more PCBs. Look for best
+ * fit.
*/
- porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
- pcbinfo->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 ((inp->inp_vflag & INP_IPV6) == 0)
+ LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
+ wildcard = 0;
+ if (!(inp->inp_vflag & INP_IPV6))
+ 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;
- if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
+ } else {
+ if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
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);
- }
-}
-#ifndef APPLE
-/* this is not used in Darwin */
-void
-in6_pcbpurgeif0(
- struct in6pcb *head,
- struct ifnet *ifp)
-{
- struct in6pcb *in6p;
- struct ip6_moptions *im6o;
- struct in6_multi_mship *imm, *nimm;
-
- for (in6p = head; in6p != NULL; in6p = LIST_NEXT(in6p, inp_list)) {
- im6o = in6p->in6p_moptions;
- if ((in6p->inp_vflag & INP_IPV6) &&
- im6o) {
- /*
- * Unselect the outgoing interface 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.
- * XXX controversial - is it really legal for kernel
- * to force this?
- */
- for (imm = im6o->im6o_memberships.lh_first;
- imm != NULL; imm = nimm) {
- nimm = imm->i6mm_chain.le_next;
- if (imm->i6mm_maddr->in6m_ifp == ifp) {
- LIST_REMOVE(imm, i6mm_chain);
- in6_delmulti(imm->i6mm_maddr);
- FREE(imm, M_IPMADDR);
+ if (wildcard < matchwild) {
+ match = inp;
+ matchwild = wildcard;
+ if (matchwild == 0) {
+ break;
}
}
}
}
+ return (match);
}
-#endif
/*
* Check for alternatives when higher level complains
* (by a redirect), time to try a default gateway again.
*/
void
-in6_losing(in6p)
- struct inpcb *in6p;
+in6_losing(struct inpcb *in6p)
{
struct rtentry *rt;
- struct rt_addrinfo info;
if ((rt = in6p->in6p_route.ro_rt) != NULL) {
- in6p->in6p_route.ro_rt = 0;
- bzero((caddr_t)&info, sizeof(info));
- info.rti_info[RTAX_DST] =
- (struct sockaddr *)&in6p->in6p_route.ro_dst;
- info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
- info.rti_info[RTAX_NETMASK] = rt_mask(rt);
- lck_mtx_lock(rt_mtx);
- rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
- if (rt->rt_flags & RTF_DYNAMIC)
- (void)rtrequest_locked(RTM_DELETE, rt_key(rt),
- rt->rt_gateway, rt_mask(rt), rt->rt_flags,
- (struct rtentry **)0);
- else
+ RT_LOCK(rt);
+ if (rt->rt_flags & RTF_DYNAMIC) {
+ /*
+ * Prevent another thread from modifying rt_key,
+ * rt_gateway via rt_setgate() after the rt_lock
+ * is dropped by marking the route as defunct.
+ */
+ rt->rt_flags |= RTF_CONDEMNED;
+ RT_UNLOCK(rt);
+ (void) rtrequest(RTM_DELETE, rt_key(rt),
+ rt->rt_gateway, rt_mask(rt), rt->rt_flags, NULL);
+ } else {
+ RT_UNLOCK(rt);
+ }
/*
* A new route can be allocated
* the next time output is attempted.
*/
- rtfree_locked(rt);
- lck_mtx_unlock(rt_mtx);
}
+ ROUTE_RELEASE(&in6p->in6p_route);
}
/*
* and allocate a (hopefully) better one.
*/
void
-in6_rtchange(
- struct inpcb *inp,
- int errno)
+in6_rtchange(struct inpcb *inp, int errno)
{
- if (inp->in6p_route.ro_rt) {
- rtfree(inp->in6p_route.ro_rt);
- inp->in6p_route.ro_rt = 0;
- /*
- * A new route can be allocated the next time
- * output is attempted.
- */
+#pragma unused(errno)
+ /*
+ * A new route can be allocated the next time
+ * output is attempted.
+ */
+ ROUTE_RELEASE(&inp->in6p_route);
+}
+
+/*
+ * Check if PCB exists hash list. Also returns uid and gid of socket
+ */
+int
+in6_pcblookup_hash_exists(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
+ u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, int wildcard,
+ uid_t *uid, gid_t *gid, struct ifnet *ifp)
+{
+ struct inpcbhead *head;
+ struct inpcb *inp;
+ u_short fport = fport_arg, lport = lport_arg;
+ int found;
+
+ *uid = UID_MAX;
+ *gid = GID_MAX;
+
+ lck_rw_lock_shared(pcbinfo->ipi_lock);
+
+ /*
+ * First look for an exact match.
+ */
+ head = &pcbinfo->ipi_hashbase[INP_PCBHASH(faddr->s6_addr32[3] /* XXX */,
+ lport, fport, pcbinfo->ipi_hashmask)];
+ LIST_FOREACH(inp, head, inp_hash) {
+ if (!(inp->inp_vflag & INP_IPV6))
+ continue;
+
+ if (inp_restricted_recv(inp, ifp))
+ 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) {
+ if ((found = (inp->inp_socket != NULL))) {
+ /*
+ * Found. Check if pcb is still valid
+ */
+ *uid = kauth_cred_getuid(
+ inp->inp_socket->so_cred);
+ *gid = kauth_cred_getgid(
+ inp->inp_socket->so_cred);
+ }
+ lck_rw_done(pcbinfo->ipi_lock);
+ return (found);
+ }
}
+ if (wildcard) {
+ struct inpcb *local_wild = NULL;
+
+ head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
+ pcbinfo->ipi_hashmask)];
+ LIST_FOREACH(inp, head, inp_hash) {
+ if (!(inp->inp_vflag & INP_IPV6))
+ continue;
+
+ if (inp_restricted_recv(inp, ifp))
+ continue;
+
+ if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
+ inp->inp_lport == lport) {
+ if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
+ laddr)) {
+ found = (inp->inp_socket != NULL);
+ if (found) {
+ *uid = kauth_cred_getuid(
+ inp->inp_socket->so_cred);
+ *gid = kauth_cred_getgid(
+ inp->inp_socket->so_cred);
+ }
+ lck_rw_done(pcbinfo->ipi_lock);
+ return (found);
+ } else if (IN6_IS_ADDR_UNSPECIFIED(
+ &inp->in6p_laddr)) {
+ local_wild = inp;
+ }
+ }
+ }
+ if (local_wild) {
+ if ((found = (local_wild->inp_socket != NULL))) {
+ *uid = kauth_cred_getuid(
+ local_wild->inp_socket->so_cred);
+ *gid = kauth_cred_getgid(
+ local_wild->inp_socket->so_cred);
+ }
+ lck_rw_done(pcbinfo->ipi_lock);
+ return (found);
+ }
+ }
+
+ /*
+ * Not found.
+ */
+ lck_rw_done(pcbinfo->ipi_lock);
+ return (0);
}
/*
* 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)
+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;
u_short fport = fport_arg, lport = lport_arg;
- int faith;
-
-#if defined(NFAITH) && NFAITH > 0
- faith = faithprefix(laddr);
-#else
- faith = 0;
-#endif
- lck_rw_lock_shared(pcbinfo->mtx);
+ lck_rw_lock_shared(pcbinfo->ipi_lock);
/*
* First look for an exact match.
*/
- head = &pcbinfo->hashbase[INP_PCBHASH(faddr->s6_addr32[3] /* XXX */,
- lport, fport,
- pcbinfo->hashmask)];
+ head = &pcbinfo->ipi_hashbase[INP_PCBHASH(faddr->s6_addr32[3] /* XXX */,
+ lport, fport, pcbinfo->ipi_hashmask)];
LIST_FOREACH(inp, head, inp_hash) {
- if ((inp->inp_vflag & INP_IPV6) == 0)
+ if (!(inp->inp_vflag & INP_IPV6))
+ continue;
+
+ if (inp_restricted_recv(inp, ifp))
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) {
/*
- * Found. Check if pcb is still valid
- */
- if (in_pcb_checkstate(inp, WNT_ACQUIRE, 0) != WNT_STOPUSING) {
- lck_rw_done(pcbinfo->mtx);
+ * Found. Check if pcb is still valid
+ */
+ if (in_pcb_checkstate(inp, WNT_ACQUIRE, 0) !=
+ WNT_STOPUSING) {
+ lck_rw_done(pcbinfo->ipi_lock);
return (inp);
- }
- else { /* it's there but dead, say it isn't found */
- lck_rw_done(pcbinfo->mtx);
- return(NULL);
+ } else {
+ /* it's there but dead, say it isn't found */
+ lck_rw_done(pcbinfo->ipi_lock);
+ return (NULL);
}
}
}
if (wildcard) {
struct inpcb *local_wild = NULL;
- head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
- pcbinfo->hashmask)];
+ head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
+ pcbinfo->ipi_hashmask)];
LIST_FOREACH(inp, head, inp_hash) {
- if ((inp->inp_vflag & INP_IPV6) == 0)
+ if (!(inp->inp_vflag & INP_IPV6))
+ continue;
+
+ if (inp_restricted_recv(inp, ifp))
continue;
+
if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
inp->inp_lport == lport) {
- if (faith && (inp->inp_flags & INP_FAITH) == 0)
- continue;
if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
- laddr)) {
- if (in_pcb_checkstate(inp, WNT_ACQUIRE, 0) != WNT_STOPUSING) {
- lck_rw_done(pcbinfo->mtx);
+ laddr)) {
+ if (in_pcb_checkstate(inp, WNT_ACQUIRE,
+ 0) != WNT_STOPUSING) {
+ lck_rw_done(pcbinfo->ipi_lock);
return (inp);
+ } else {
+ /* dead; say it isn't found */
+ lck_rw_done(pcbinfo->ipi_lock);
+ return (NULL);
}
- else { /* it's there but dead, say it isn't found */
- lck_rw_done(pcbinfo->mtx);
- return(NULL);
- }
- }
- else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
+ } else if (IN6_IS_ADDR_UNSPECIFIED(
+ &inp->in6p_laddr)) {
local_wild = inp;
+ }
}
}
- if (local_wild && in_pcb_checkstate(local_wild, WNT_ACQUIRE, 0) != WNT_STOPUSING) {
- lck_rw_done(pcbinfo->mtx);
+ if (local_wild && in_pcb_checkstate(local_wild,
+ WNT_ACQUIRE, 0) != WNT_STOPUSING) {
+ lck_rw_done(pcbinfo->ipi_lock);
return (local_wild);
- }
- else {
- lck_rw_done(pcbinfo->mtx);
+ } else {
+ lck_rw_done(pcbinfo->ipi_lock);
return (NULL);
}
}
/*
* Not found.
*/
- lck_rw_done(pcbinfo->mtx);
+ lck_rw_done(pcbinfo->ipi_lock);
return (NULL);
}
struct ip6_hdr *ip;
ip = mtod(m, struct ip6_hdr *);
- bzero(sin6, sizeof(*sin6));
- sin6->sin6_len = sizeof(*sin6);
+ bzero(sin6, sizeof (*sin6));
+ sin6->sin6_len = sizeof (*sin6);
sin6->sin6_family = AF_INET6;
sin6->sin6_addr = ip->ip6_src;
- if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
+ if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
sin6->sin6_addr.s6_addr16[1] = 0;
- sin6->sin6_scope_id =
- (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
- ? m->m_pkthdr.rcvif->if_index : 0;
+ if ((m->m_pkthdr.pkt_flags & (PKTF_LOOP|PKTF_IFAINFO)) ==
+ (PKTF_LOOP|PKTF_IFAINFO))
+ sin6->sin6_scope_id = m->m_pkthdr.src_ifindex;
+ else if (m->m_pkthdr.rcvif != NULL)
+ sin6->sin6_scope_id = m->m_pkthdr.rcvif->if_index;
+ }
+}
+
+/*
+ * The following routines implement this scheme:
+ *
+ * Callers of ip6_output() that intend to cache the route in the inpcb pass
+ * a local copy of the struct route to ip6_output(). Using a local copy of
+ * the cached route significantly simplifies things as IP no longer has to
+ * worry about having exclusive access to the passed in struct route, since
+ * it's defined in the caller's stack; in essence, this allows for a lock-
+ * less operation when updating the struct route at the IP level and below,
+ * whenever necessary. The scheme works as follows:
+ *
+ * Prior to dropping the socket's lock and calling ip6_output(), the caller
+ * copies the struct route from the inpcb into its stack, and adds a reference
+ * to the cached route entry, if there was any. The socket's lock is then
+ * dropped and ip6_output() is called with a pointer to the copy of struct
+ * route defined on the stack (not to the one in the inpcb.)
+ *
+ * Upon returning from ip6_output(), the caller then acquires the socket's
+ * lock and synchronizes the cache; if there is no route cached in the inpcb,
+ * it copies the local copy of struct route (which may or may not contain any
+ * route) back into the cache; otherwise, if the inpcb has a route cached in
+ * it, the one in the local copy will be freed, if there's any. Trashing the
+ * cached route in the inpcb can be avoided because ip6_output() is single-
+ * threaded per-PCB (i.e. multiple transmits on a PCB are always serialized
+ * by the socket/transport layer.)
+ */
+void
+in6p_route_copyout(struct inpcb *inp, struct route_in6 *dst)
+{
+ struct route_in6 *src = &inp->in6p_route;
+
+ lck_mtx_assert(&inp->inpcb_mtx, LCK_MTX_ASSERT_OWNED);
+
+ /* Minor sanity check */
+ if (src->ro_rt != NULL && rt_key(src->ro_rt)->sa_family != AF_INET6)
+ panic("%s: wrong or corrupted route: %p", __func__, src);
+
+ route_copyout((struct route *)dst, (struct route *)src, sizeof (*dst));
+}
+
+void
+in6p_route_copyin(struct inpcb *inp, struct route_in6 *src)
+{
+ struct route_in6 *dst = &inp->in6p_route;
+
+ lck_mtx_assert(&inp->inpcb_mtx, LCK_MTX_ASSERT_OWNED);
+
+ /* Minor sanity check */
+ if (src->ro_rt != NULL && rt_key(src->ro_rt)->sa_family != AF_INET6)
+ panic("%s: wrong or corrupted route: %p", __func__, src);
- return;
+ route_copyin((struct route *)src, (struct route *)dst, sizeof (*src));
}
projects / apple / xnu.git / blobdiff