/*
- * Copyright (c) 2003-2012 Apple Inc. All rights reserved.
+ * Copyright (c) 2003-2020 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_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
* 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.
- *
+ *
* 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,
* 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_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
#include <net/if.h>
#include <net/if_types.h>
#include <net/route.h>
+#include <net/ntstat.h>
+#include <net/restricted_in_port.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/in_systm.h>
#include <netinet/ip6.h>
#include <netinet/ip_var.h>
+
#include <netinet6/ip6_var.h>
#include <netinet6/nd6.h>
#include <netinet/in_pcb.h>
#include <netinet6/in6_pcb.h>
+
#include <net/if_types.h>
#include <net/if_var.h>
#if IPSEC
#include <netinet6/ipsec.h>
-#if INET6
#include <netinet6/ipsec6.h>
-#endif
#include <netinet6/ah.h>
-#if INET6
#include <netinet6/ah6.h>
-#endif
#include <netkey/key.h>
#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)
+ * 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 && inp->inp_wantcnt == WNT_STOPUSING) {
+ if (inp != NULL && inp->inp_wantcnt == WNT_STOPUSING) {
struct socket *so = inp->inp_socket;
-
- lck_mtx_lock(&inp->inpcb_mtx);
-
+
+ socket_lock(so, 0);
+
if (so->so_usecount == 0) {
- if (inp->inp_state != INPCB_STATE_DEAD)
+ if (inp->inp_state != INPCB_STATE_DEAD) {
in6_pcbdetach(inp);
- in_pcbdispose(inp);
+ }
+ in_pcbdispose(inp); /* will unlock & destroy */
inp = NULL;
- }
- else {
- lck_mtx_unlock(&inp->inpcb_mtx);
+ } else {
+ socket_unlock(so, 0);
}
}
-
+
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)
{
struct socket *so = inp->inp_socket;
- struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
- u_short lport = 0;
+ u_short lport = 0;
int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
-#if !CONFIG_EMBEDDED
+ struct ifnet *outif = NULL;
+ struct sockaddr_in6 sin6;
+#if XNU_TARGET_OS_OSX
int error;
kauth_cred_t cred;
-#endif
+#endif /* XNU_TARGET_OS_OSX */
- 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)
+ if (TAILQ_EMPTY(&in6_ifaddrhead)) { /* XXX broken! */
+ return EADDRNOTAVAIL;
+ }
+ if (!(so->so_options & (SO_REUSEADDR | SO_REUSEPORT))) {
wild = 1;
+ }
+
socket_unlock(so, 0); /* keep reference */
- lck_rw_lock_exclusive(pcbinfo->mtx);
- if (nam) {
- struct ifnet *outif = NULL;
+ lck_rw_lock_exclusive(pcbinfo->ipi_lock);
+ if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
+ /* another thread completed the bind */
+ lck_rw_done(pcbinfo->ipi_lock);
+ socket_lock(so, 0);
+ return EINVAL;
+ }
- sin6 = (struct sockaddr_in6 *)(void *)nam;
- if (nam->sa_len != sizeof(*sin6)) {
- lck_rw_done(pcbinfo->mtx);
+ 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,
+ if (in6_embedscope(&sin6.sin6_addr, &sin6, inp, NULL,
NULL) != 0) {
- lck_rw_done(pcbinfo->mtx);
+ lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
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
* 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)) {
+ 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)) == 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 (ifa != NULL) {
+ 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)) {
+ (IN6_IFF_ANYCAST | IN6_IFF_NOTREADY |
+ IN6_IFF_DETACHED | IN6_IFF_CLAT46)) {
IFA_UNLOCK(ifa);
IFA_REMREF(ifa);
- lck_rw_done(pcbinfo->mtx);
+ lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
- return(EADDRNOTAVAIL);
+ 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);
}
}
- if (lport) {
+
+
+ if (lport != 0) {
struct inpcb *t;
+ uid_t u;
- /* GROSS */
-#if !CONFIG_EMBEDDED
- if (ntohs(lport) < IPV6PORT_RESERVED) {
+#if XNU_TARGET_OS_OSX
+ if (ntohs(lport) < IPV6PORT_RESERVED &&
+ !IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) &&
+ !(inp->inp_flags2 & INP2_EXTERNAL_PORT)) {
cred = kauth_cred_proc_ref(p);
- error = priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0);
+ error = priv_check_cred(cred,
+ PRIV_NETINET_RESERVEDPORT, 0);
kauth_cred_unref(&cred);
if (error != 0) {
- lck_rw_done(pcbinfo->mtx);
+ lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
- return(EACCES);
+ return EACCES;
}
}
-#endif
+#endif /* XNU_TARGET_OS_OSX */
+ /*
+ * Check wether the process is allowed to bind to a restricted port
+ */
+ if (!current_task_can_use_restricted_in_port(lport,
+ (uint8_t)SOCK_PROTO(so), PORT_FLAGS_BSD)) {
+ lck_rw_done(pcbinfo->ipi_lock);
+ socket_lock(so, 0);
+ return EADDRINUSE;
+ }
- if (kauth_cred_getuid(so->so_cred) &&
- !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
+ 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,
+ &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) &&
- (kauth_cred_getuid(so->so_cred) !=
- kauth_cred_getuid(t->inp_socket->so_cred)) &&
- ((t->inp_socket->so_flags & SOF_REUSESHAREUID) == 0)) {
- 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) &&
+ (!(t->inp_flags2 & INP2_EXTERNAL_PORT) ||
+ !(inp->inp_flags2 & INP2_EXTERNAL_PORT) ||
+ uuid_compare(t->necp_client_uuid, inp->necp_client_uuid) != 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_and_cleanup(pcbinfo,
- sin.sin_addr, lport,
+ in6_sin6_2_sin(&sin, &sin6);
+ t = in_pcblookup_local_and_cleanup(
+ pcbinfo, sin.sin_addr, lport,
INPLOOKUP_WILDCARD);
- if (t && (t->inp_socket->so_options & SO_REUSEPORT) == 0 &&
+ if (t != NULL &&
+ !(t->inp_socket->so_options & SO_REUSEPORT) &&
(kauth_cred_getuid(so->so_cred) !=
- kauth_cred_getuid(t->inp_socket->so_cred)) &&
- (ntohl(t->inp_laddr.s_addr) !=
- INADDR_ANY ||
- INP_SOCKAF(so) ==
- INP_SOCKAF(t->inp_socket))) {
-
- lck_rw_done(pcbinfo->mtx);
+ kauth_cred_getuid(t->inp_socket->so_cred)) &&
+ (t->inp_laddr.s_addr != INADDR_ANY ||
+ SOCK_DOM(so) == SOCK_DOM(t->inp_socket)) &&
+ (!(t->inp_flags2 & INP2_EXTERNAL_PORT) ||
+ !(inp->inp_flags2 & INP2_EXTERNAL_PORT) ||
+ uuid_compare(t->necp_client_uuid, inp->necp_client_uuid) != 0)) {
+ lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
- return (EADDRINUSE);
+ return EADDRINUSE;
}
+
}
}
- t = in6_pcblookup_local_and_cleanup(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 &&
+ (!(t->inp_flags2 & INP2_EXTERNAL_PORT) ||
+ !(inp->inp_flags2 & INP2_EXTERNAL_PORT) ||
+ uuid_compare(t->necp_client_uuid, inp->necp_client_uuid) != 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_and_cleanup(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)) &&
+ (!(t->inp_flags2 & INP2_EXTERNAL_PORT) ||
+ !(inp->inp_flags2 & INP2_EXTERNAL_PORT) ||
+ uuid_compare(t->necp_client_uuid, inp->necp_client_uuid) != 0)) {
+ lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
- return (EADDRINUSE);
+ return EADDRINUSE;
}
}
}
- inp->in6p_laddr = sin6->sin6_addr;
- inp->in6p_last_outifp = outif;
}
+
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;
inp->in6p_last_outifp = NULL;
- lck_rw_done(pcbinfo->mtx);
- return (EAGAIN);
+ lck_rw_done(pcbinfo->ipi_lock);
+ return EAGAIN;
}
}
- lck_rw_done(pcbinfo->mtx);
+ lck_rw_done(pcbinfo->ipi_lock);
sflt_notify(so, sock_evt_bound, NULL);
- return(0);
+ 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.
+ * 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
in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
struct in6_addr *plocal_addr6, struct ifnet **outif)
{
- struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)(void *)nam;
struct in6_addr *addr6 = NULL;
struct in6_addr src_storage;
int error = 0;
unsigned int ifscope;
- if (outif != NULL)
+ if (outif != NULL) {
*outif = NULL;
- if (nam->sa_len != sizeof (*sin6))
- return (EINVAL);
- if (sin6->sin6_family != AF_INET6)
- return (EAFNOSUPPORT);
- if (sin6->sin6_port == 0)
- return (EADDRNOTAVAIL);
+ }
+ if (nam->sa_len != sizeof(struct sockaddr_in6)) {
+ return EINVAL;
+ }
+ if (SIN6(nam)->sin6_family != AF_INET6) {
+ return EAFNOSUPPORT;
+ }
+ if (SIN6(nam)->sin6_port == 0) {
+ return EADDRNOTAVAIL;
+ }
/* KAME hack: embed scopeid */
- if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL, NULL) != 0)
- return (EINVAL);
+ if (in6_embedscope(&SIN6(nam)->sin6_addr, SIN6(nam), inp, NULL, NULL) != 0) {
+ return EINVAL;
+ }
- if (in6_ifaddrs) {
+ if (!TAILQ_EMPTY(&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 (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;
+ inp->inp_boundifp->if_index : IFSCOPE_NONE;
/*
* XXX: in6_selectsrc might replace the bound local address
* even in the error case; caller always needs to release it
* if non-NULL.
*/
- addr6 = in6_selectsrc(sin6, inp->in6p_outputopts, inp,
+ addr6 = in6_selectsrc(SIN6(nam), inp->in6p_outputopts, inp,
&inp->in6p_route, outif, &src_storage, ifscope, &error);
if (outif != NULL) {
* it could still be useful to the caller.
*/
if (rt != NULL && rt->rt_ifp != *outif) {
- ifnet_reference(rt->rt_ifp); /* for caller */
- if (*outif != NULL)
+ ifnet_reference(rt->rt_ifp); /* for caller */
+ if (*outif != NULL) {
ifnet_release(*outif);
+ }
*outif = rt->rt_ifp;
}
}
if (addr6 == NULL) {
if (outif != NULL && (*outif) != NULL &&
- (inp->inp_flags & INP_NO_IFT_CELLULAR) &&
- (*outif)->if_type == IFT_CELLULAR)
+ inp_restricted_send(inp, *outif)) {
soevent(inp->inp_socket,
(SO_FILT_HINT_LOCKED | SO_FILT_HINT_IFDENIED));
- if (error == 0)
+ error = EHOSTUNREACH;
+ }
+ if (error == 0) {
error = EADDRNOTAVAIL;
- return (error);
+ }
+ return error;
}
*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);
+ return 0;
}
/*
* then pick one.
*/
int
-in6_pcbconnect(
- 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 *)(void *)nam;
struct inpcb *pcb;
int error = 0;
struct ifnet *outif = NULL;
+ struct socket *so = inp->inp_socket;
+
+#if CONTENT_FILTER
+ so->so_state_change_cnt++;
+#endif
+
+ if (so->so_proto->pr_protocol == IPPROTO_UDP &&
+ sin6->sin6_port == htons(53) && !(so->so_flags1 & SOF1_DNS_COUNTED)) {
+ so->so_flags1 |= SOF1_DNS_COUNTED;
+ INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_inet_dgram_dns);
+ }
/*
* Call inner routine, to assign local interface address.
* whenever it's non-NULL.
*/
if ((error = in6_pcbladdr(inp, nam, &addr6, &outif)) != 0) {
- if ((inp->inp_flags & INP_NO_IFT_CELLULAR) &&
- outif != NULL &&
- outif->if_type == IFT_CELLULAR)
- soevent(inp->inp_socket,
+ if (outif != NULL && inp_restricted_send(inp, outif)) {
+ soevent(so,
(SO_FILT_HINT_LOCKED | SO_FILT_HINT_IFDENIED));
+ }
goto done;
}
- socket_unlock(inp->inp_socket, 0);
+ 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, pcb == inp ? 1 : 0);
error = EADDRINUSE;
}
if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
if (inp->inp_lport == 0) {
- error = in6_pcbbind(inp, (struct sockaddr *)0, p);
- if (error)
+ error = in6_pcbbind(inp, NULL, p);
+ if (error) {
goto done;
+ }
}
inp->in6p_laddr = addr6;
- inp->in6p_last_outifp = outif; /* no reference needed */
+ 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);
+ lck_rw_done(inp->inp_pcbinfo->ipi_lock);
done:
- if (outif != NULL)
+ if (outif != NULL) {
ifnet_release(outif);
+ }
- return (error);
+ return error;
}
void
-in6_pcbdisconnect(
- 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 CONTENT_FILTER
+ if (so) {
+ so->so_state_change_cnt++;
+ }
+#endif
+
+ 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);
+ }
+ 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(
- 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) {
- ipsec6_delete_pcbpolicy(inp);
+ (void) ipsec6_delete_pcbpolicy(inp);
}
#endif /* IPSEC */
- if (in_pcb_checkstate(inp, WNT_STOPUSING, 1) != WNT_STOPUSING)
- printf("in6_pcbdetach so=%p can't be marked dead ok\n", so);
+ if (inp->inp_stat != NULL && SOCK_PROTO(so) == IPPROTO_UDP) {
+ if (inp->inp_stat->rxpackets == 0 && inp->inp_stat->txpackets == 0) {
+ INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_inet6_dgram_no_data);
+ }
+ }
- inp->inp_state = INPCB_STATE_DEAD;
+ /*
+ * 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 */
+ }
- if ((so->so_flags & SOF_PCBCLEARING) == 0) {
+ if (!(so->so_flags & SOF_PCBCLEARING)) {
struct ip_moptions *imo;
struct ip6_moptions *im6o;
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);
+ inp->in6p_options = NULL;
+ }
ip6_freepcbopts(inp->in6p_outputopts);
- if (inp->in6p_route.ro_rt) {
- rtfree(inp->in6p_route.ro_rt);
- inp->in6p_route.ro_rt = NULL;
+ inp->in6p_outputopts = NULL;
+ 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;
}
- /* Check and free IPv4 related resources in case of mapped addr */
- if (inp->inp_options)
- (void)m_free(inp->inp_options);
-
im6o = inp->in6p_moptions;
inp->in6p_moptions = NULL;
- if (im6o != NULL)
- IM6O_REMREF(im6o);
imo = inp->inp_moptions;
inp->inp_moptions = NULL;
- if (imo != NULL)
- IMO_REMREF(imo);
+
+ 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(
- 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);
- if (sin6 == NULL)
+ MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME, M_WAITOK);
+ if (sin6 == NULL) {
return NULL;
- bzero(sin6, sizeof *sin6);
+ }
+ bzero(sin6, sizeof(*sin6));
sin6->sin6_family = AF_INET6;
sin6->sin6_len = sizeof(*sin6);
sin6->sin6_port = port;
sin6->sin6_addr = *addr_p;
- if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
+
+ /* 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))
+ } else {
+ 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;
}
-struct sockaddr *
-in6_v4mapsin6_sockaddr(
- 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);
- if (sin6_p == NULL)
- return NULL;
- 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(
- 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) {
+ if ((inp = sotoinpcb(so)) == NULL) {
return EINVAL;
}
+
port = inp->inp_lport;
addr = inp->in6p_laddr;
*nam = in6_sockaddr(port, &addr);
- if (*nam == NULL)
+ if (*nam == NULL) {
return ENOBUFS;
+ }
+ return 0;
+}
+
+int
+in6_getsockaddr_s(struct socket *so, struct sockaddr_in6 *ss)
+{
+ struct inpcb *inp;
+ struct in6_addr addr;
+ in_port_t port;
+
+ VERIFY(ss != NULL);
+ bzero(ss, sizeof(*ss));
+
+ if ((inp = sotoinpcb(so)) == NULL) {
+ return EINVAL;
+ }
+
+ port = inp->inp_lport;
+ addr = inp->in6p_laddr;
+
+ in6_sockaddr_s(port, &addr, ss);
return 0;
}
int
-in6_setpeeraddr(
- struct socket *so,
- struct sockaddr **nam)
+in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
{
struct inpcb *inp;
struct in6_addr addr;
in_port_t port;
- inp = sotoinpcb(so);
- if (!inp) {
+ if ((inp = sotoinpcb(so)) == NULL) {
return EINVAL;
}
+
port = inp->inp_fport;
addr = inp->in6p_faddr;
*nam = in6_sockaddr(port, &addr);
- if (*nam == NULL)
+ if (*nam == NULL) {
return ENOBUFS;
+ }
return 0;
}
int
in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
{
- struct inpcb *inp = sotoinpcb(so);
- int error;
+ struct inpcb *inp = sotoinpcb(so);
+ int error;
- if (inp == NULL)
+ if (inp == NULL) {
return EINVAL;
+ }
if (inp->inp_vflag & INP_IPV4) {
- error = in_setsockaddr(so, nam);
- if (error == 0)
+ error = in_getsockaddr(so, nam);
+ if (error == 0) {
error = in6_sin_2_v4mapsin6_in_sock(nam);
+ }
} else {
- /* scope issues will be handled in in6_setsockaddr(). */
- error = in6_setsockaddr(so, nam);
+ /* 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 = sotoinpcb(so);
- int error;
+ struct inpcb *inp = sotoinpcb(so);
+ int error;
- if (inp == NULL)
+ if (inp == NULL) {
return EINVAL;
+ }
if (inp->inp_vflag & INP_IPV4) {
- error = in_setpeeraddr(so, nam);
- if (error == 0)
+ error = in_getpeeraddr(so, nam);
+ if (error == 0) {
error = in6_sin_2_v4mapsin6_in_sock(nam);
+ }
} else {
- /* scope issues will be handled in in6_setpeeraddr(). */
- error = in6_setpeeraddr(so, nam);
+ /* scope issues will be handled in in6_getpeeraddr(). */
+ error = in6_getpeeraddr(so, nam);
}
return error;
}
* any errors for each matching socket.
*/
void
-in6_pcbnotify(pcbinfo, dst, fport_arg, src, lport_arg, cmd, cmdarg, notify)
- struct inpcbinfo *pcbinfo;
- struct sockaddr *dst;
- const struct sockaddr *src;
- u_int fport_arg, lport_arg;
- int cmd;
- void *cmdarg;
- 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;
+ uint16_t fport = (uint16_t)fport_arg, lport = (uint16_t)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 *)(void *)dst;
- if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
+ if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) {
return;
+ }
/*
* note that src can be NULL when we get notify by local fragmentation.
lport = 0;
bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
- if (cmd != PRC_HOSTDEAD)
+ 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
* 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))) {
+ if (cmd == PRC_MSGSIZE && cmdarg != NULL) {
+ socket_lock(inp->inp_socket, 1);
ip6_notify_pmtu(inp, (struct sockaddr_in6 *)(void *)dst,
(u_int32_t *)cmdarg);
+ socket_unlock(inp->inp_socket, 1);
}
/*
*/
if (lport == 0 && fport == 0 && flowinfo &&
inp->inp_socket != NULL &&
- flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
- IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
+ 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))
+ } else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
+ &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(
- 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;
+ uint16_t lport = (uint16_t)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) &&
inp->inp_lport == lport) {
/*
* Found.
*/
- return (inp);
+ return inp;
}
}
/*
* Not found.
*/
- return (NULL);
- } else {
- struct inpcbporthead *porthash;
- struct inpcbport *phd;
- struct inpcb *match = NULL;
+ return 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;
- }
+ }
+ if (wildcard < matchwild) {
+ match = inp;
+ matchwild = wildcard;
+ if (matchwild == 0) {
+ break;
}
}
}
- return (match);
}
+ return match;
}
/*
* (by a redirect), time to try a default gateway again.
*/
void
-in6_losing(
- 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 = NULL;
RT_LOCK(rt);
- 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);
- rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
if (rt->rt_flags & RTF_DYNAMIC) {
/*
* Prevent another thread from modifying rt_key,
* A new route can be allocated
* the next time output is attempted.
*/
- rtfree(rt);
}
+ ROUTE_RELEASE(&in6p->in6p_route);
}
/*
* and allocate a (hopefully) better one.
*/
void
-in6_rtchange(
- struct inpcb *inp,
- __unused 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)
+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;
+ uint16_t fport = (uint16_t)fport_arg, lport = (uint16_t)lport_arg;
int found;
*uid = UID_MAX;
*gid = GID_MAX;
- 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 (ip6_restrictrecvif && ifp != NULL &&
- (ifp->if_eflags & IFEF_RESTRICTED_RECV) &&
- !(inp->in6p_flags & IN6P_RECV_ANYIF))
+#if NECP
+ if (!necp_socket_is_allowed_to_recv_on_interface(inp, ifp)) {
continue;
+ }
+#endif /* NECP */
if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
* Found. Check if pcb is still valid
*/
*uid = kauth_cred_getuid(
- inp->inp_socket->so_cred);
+ inp->inp_socket->so_cred);
*gid = kauth_cred_getgid(
- inp->inp_socket->so_cred);
+ inp->inp_socket->so_cred);
}
- lck_rw_done(pcbinfo->mtx);
- return (found);
+ lck_rw_done(pcbinfo->ipi_lock);
+ return found;
}
}
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 (ip6_restrictrecvif && ifp != NULL &&
- (ifp->if_eflags & IFEF_RESTRICTED_RECV) &&
- !(inp->in6p_flags & IN6P_RECV_ANYIF))
+ if (inp_restricted_recv(inp, ifp)) {
continue;
+ }
+
+#if NECP
+ if (!necp_socket_is_allowed_to_recv_on_interface(inp, ifp)) {
+ continue;
+ }
+#endif /* NECP */
if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
inp->inp_lport == lport) {
if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
- laddr)) {
- if ((found = (inp->inp_socket != NULL))) {
+ laddr)) {
+ found = (inp->inp_socket != NULL);
+ if (found) {
*uid = kauth_cred_getuid(
- inp->inp_socket->so_cred);
+ inp->inp_socket->so_cred);
*gid = kauth_cred_getgid(
- inp->inp_socket->so_cred);
+ inp->inp_socket->so_cred);
}
- lck_rw_done(pcbinfo->mtx);
- return (found);
- }
- else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
+ 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);
+ local_wild->inp_socket->so_cred);
*gid = kauth_cred_getgid(
- local_wild->inp_socket->so_cred);
+ local_wild->inp_socket->so_cred);
}
- lck_rw_done(pcbinfo->mtx);
- return (found);
+ lck_rw_done(pcbinfo->ipi_lock);
+ return found;
}
}
/*
* Not found.
*/
- lck_rw_done(pcbinfo->mtx);
- return (0);
+ 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,
- __unused 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;
+ uint16_t fport = (uint16_t)fport_arg, lport = (uint16_t)lport_arg;
- 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 (ip6_restrictrecvif && ifp != NULL &&
- (ifp->if_eflags & IFEF_RESTRICTED_RECV) &&
- !(inp->in6p_flags & IN6P_RECV_ANYIF))
+#if NECP
+ if (!necp_socket_is_allowed_to_recv_on_interface(inp, ifp)) {
continue;
+ }
+#endif /* NECP */
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);
- return (inp);
- }
- else { /* it's there but dead, say it isn't found */
- lck_rw_done(pcbinfo->mtx);
- return (NULL);
+ * 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->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 (ip6_restrictrecvif && ifp != NULL &&
- (ifp->if_eflags & IFEF_RESTRICTED_RECV) &&
- !(inp->in6p_flags & IN6P_RECV_ANYIF))
+ if (inp_restricted_recv(inp, ifp)) {
continue;
+ }
+
+#if NECP
+ if (!necp_socket_is_allowed_to_recv_on_interface(inp, ifp)) {
+ continue;
+ }
+#endif /* NECP */
if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
inp->inp_lport == lport) {
if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
- laddr)) {
- if (in_pcb_checkstate(inp, WNT_ACQUIRE, 0) != WNT_STOPUSING) {
- lck_rw_done(pcbinfo->mtx);
- return (inp);
+ 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);
- return (local_wild);
- }
- else {
- lck_rw_done(pcbinfo->mtx);
- return (NULL);
+ 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->ipi_lock);
+ return NULL;
}
}
/*
* Not found.
*/
- lck_rw_done(pcbinfo->mtx);
- return (NULL);
+ lck_rw_done(pcbinfo->ipi_lock);
+ return NULL;
}
void
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;
-
- return;
+ 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);
+ socket_lock_assert_owned(inp->inp_socket);
/* Minor sanity check */
- if (src->ro_rt != NULL && rt_key(src->ro_rt)->sa_family != AF_INET6)
+ 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));
}
{
struct route_in6 *dst = &inp->in6p_route;
- lck_mtx_assert(&inp->inpcb_mtx, LCK_MTX_ASSERT_OWNED);
+ socket_lock_assert_owned(inp->inp_socket);
/* Minor sanity check */
- if (src->ro_rt != NULL && rt_key(src->ro_rt)->sa_family != AF_INET6)
+ if (src->ro_rt != NULL && rt_key(src->ro_rt)->sa_family != AF_INET6) {
panic("%s: wrong or corrupted route: %p", __func__, src);
+ }
route_copyin((struct route *)src, (struct route *)dst, sizeof(*src));
}
-
projects / apple / xnu.git / blobdiff