fix for mantis 304

src/libCom/osi/os/cygwin32/osdSockAddrReuse.cpp

@@ -0,0 +1,45 @@
+
+/*************************************************************************\
+* Copyright (c) 2002 The University of Chicago, as Operator of Argonne
+*     National Laboratory.
+* Copyright (c) 2002 The Regents of the University of California, as
+*     Operator of Los Alamos National Laboratory.
+* EPICS BASE Versions 3.13.7
+* and higher are distributed subject to a Software License Agreement found
+* in file LICENSE that is included with this distribution. 
+\*************************************************************************/
+
+/*
+ * $Id$
+ * Author: Jeff Hill
+ */
+
+#define epicsExportSharedSymbols
+#include "osiSock.h"
+#include "errlog.h"
+
+/*
+ * Note: WINSOCK appears to assign a different functionality for 
+ * SO_REUSEADDR compared to other OS. With WINSOCK SO_REUSEADDR indicates
+ * that simultaneously servers can bind to the same TCP port on the same host!
+ * Also, servers are always enabled to reuse a port immediately after 
+ * they exit ( even if SO_REUSEADDR isnt set ).
+ */
+epicsShareFunc void epicsShareAPI 
+    epicsSocketEnableAddressReuseDuringTimeWaitState ( SOCKET s )
+{
+}
+
+epicsShareFunc void epicsShareAPI 
+    epicsSocketEnableAddressUseForDatagramFanout ( SOCKET s )
+{
+    int yes = true;
+    int status;
+    status = setsockopt ( s, SOL_SOCKET, SO_REUSEADDR,
+        (char *) & yes, sizeof ( yes ) );
+    if ( status < 0 ) {
+        errlogPrintf (
+            "epicsSocketEnablePortUseForDatagramFanout: "
+            "unable to set SO_REUSEADDR?\n");
+    }
+}