[phater] 73120: [MSAFD] Disable setting blocking mode if there are WSPAsyncSelect or WSPEventSelect pending calls. CORE-12104

Author: phater
Date: Fri Nov  4 09:38:21 2016
New Revision: 73120

URL: http://svn.reactos.org/svn/reactos?rev=73120&view=rev
Log:
[MSAFD] Disable setting blocking mode if there are WSPAsyncSelect or WSPEventSelect pending calls. CORE-12104

Modified:
    trunk/reactos/dll/win32/msafd/misc/dllmain.c

Modified: trunk/reactos/dll/win32/msafd/misc/dllmain.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/msafd/misc/dllmai...
==============================================================================
--- trunk/reactos/dll/win32/msafd/misc/dllmain.c	[iso-8859-1] (original)
+++ trunk/reactos/dll/win32/msafd/misc/dllmain.c	[iso-8859-1] Fri Nov  4 09:38:21 2016
@@ -2264,6 +2264,22 @@
                 break;
             }
             NonBlocking = *((PULONG)lpvInBuffer) ? TRUE : FALSE;
+            /* Don't allow to go in blocking mode if WSPAsyncSelect or WSPEventSelect is pending */
+            if (!NonBlocking)
+            {
+                /* If there is an WSPAsyncSelect pending, fail with WSAEINVAL */
+                if (Socket->SharedData->AsyncEvents & (~Socket->SharedData->AsyncDisabledEvents))
+                {
+                    Errno = WSAEINVAL;
+                    break;
+                }
+                /* If there is an WSPEventSelect pending, fail with WSAEINVAL */
+                if (Socket->NetworkEvents)
+                {
+                    Errno = WSAEINVAL;
+                    break;
+                }
+            }
             Socket->SharedData->NonBlocking = NonBlocking ? 1 : 0;
             NeedsCompletion = FALSE;
             Errno = SetSocketInformation(Socket, AFD_INFO_BLOCKING_MODE, &NonBlocking, NULL, NULL, lpOverlapped, lpCompletionRoutine);