X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/e5568f75972dfc723778653c11cb6b4dc825716a..b226f5e54a60dc81db17b1260381d7dbfea3cdf1:/bsd/net/raw_cb.c

diff --git a/bsd/net/raw_cb.c b/bsd/net/raw_cb.c
index 105ef13c8..2aaaeeb4b 100644
--- a/bsd/net/raw_cb.c
+++ b/bsd/net/raw_cb.c
@@ -1,23 +1,29 @@
 /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2012 Apple Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource 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.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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 OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * 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_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  * Copyright (c) 1980, 1986, 1993
@@ -60,6 +66,7 @@
 #include <sys/socketvar.h>
 #include <sys/domain.h>
 #include <sys/protosw.h>
+#include <kern/locks.h>
 
 #include <net/raw_cb.h>
 
@@ -74,19 +81,18 @@
 
 struct rawcb_list_head rawcb_list;
 
-static u_long	raw_sendspace = RAWSNDQ;
-static u_long	raw_recvspace = RAWRCVQ;
+static uint32_t	raw_sendspace = RAWSNDQ;
+static uint32_t	raw_recvspace = RAWRCVQ;
+extern lck_mtx_t 	*raw_mtx;	/*### global raw cb mutex for now */
 
 /*
  * Allocate a control block and a nominal amount
  * of buffer space for the socket.
  */
 int
-raw_attach(so, proto)
-	register struct socket *so;
-	int proto;
+raw_attach(struct socket *so, int proto)
 {
-	register struct rawcb *rp = sotorawcb(so);
+	struct rawcb *rp = sotorawcb(so);
 	int error;
 
 	/*
@@ -100,9 +106,11 @@ raw_attach(so, proto)
 	if (error)
 		return (error);
 	rp->rcb_socket = so;
-	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
+	rp->rcb_proto.sp_family = SOCK_DOM(so);
 	rp->rcb_proto.sp_protocol = proto;
+	lck_mtx_lock(raw_mtx);
 	LIST_INSERT_HEAD(&rawcb_list, rp, list);
+	lck_mtx_unlock(raw_mtx);
 	return (0);
 }
 
@@ -111,19 +119,26 @@ raw_attach(so, proto)
  * socket resources.
  */
 void
-raw_detach(rp)
-	register struct rawcb *rp;
+raw_detach(struct rawcb *rp)
 {
 	struct socket *so = rp->rcb_socket;
 
 	so->so_pcb = 0;
+	so->so_flags |= SOF_PCBCLEARING;
 	sofree(so);
+	if (!lck_mtx_try_lock(raw_mtx)) {
+		socket_unlock(so, 0);
+		lck_mtx_lock(raw_mtx);
+		socket_lock(so, 0);
+	}
 	LIST_REMOVE(rp, list);
+	lck_mtx_unlock(raw_mtx);
 #ifdef notdef
 	if (rp->rcb_laddr)
 		m_freem(dtom(rp->rcb_laddr));
 	rp->rcb_laddr = 0;
 #endif
+	rp->rcb_socket = NULL;
 	FREE((caddr_t)(rp), M_PCB);
 }
 
@@ -131,16 +146,21 @@ raw_detach(rp)
  * Disconnect and possibly release resources.
  */
 void
-raw_disconnect(rp)
-	struct rawcb *rp;
+raw_disconnect(struct rawcb *rp)
 {
+	struct socket *so = rp->rcb_socket;
 
 #ifdef notdef
 	if (rp->rcb_faddr)
 		m_freem(dtom(rp->rcb_faddr));
 	rp->rcb_faddr = 0;
 #endif
-	if (rp->rcb_socket->so_state & SS_NOFDREF)
+	/*
+	 * 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))
 		raw_detach(rp);
 }
 
@@ -148,17 +168,17 @@ raw_disconnect(rp)
 #include <sys/mbuf.h>
 
 int
-raw_bind(so, nam)
-	register struct socket *so;
-	struct mbuf *nam;
+raw_bind(struct socket *so, struct mbuf *nam)
 {
 	struct sockaddr *addr = mtod(nam, struct sockaddr *);
-	register struct rawcb *rp;
+	struct rawcb *rp;
 
 	if (ifnet == 0)
 		return (EADDRNOTAVAIL);
 	rp = sotorawcb(so);
 	nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
+	if (nam == NULL)
+		return ENOBUFS;
 	rp->rcb_laddr = mtod(nam, struct sockaddr *);
 	return (0);
 }