server: Don't block ConnectNamedPipe for pipe in PIPE_NOWAIT mode.

dlls/kernel32/tests/pipe.c

@@ -4026,7 +4026,7 @@ static void test_nowait(void)
     ol.hEvent = CreateEventW(NULL, TRUE, FALSE, NULL);
     SetLastError(0xdeadbeef);
     ok(ConnectNamedPipe(pipewrite, &ol) == FALSE, "ConnectNamedPipe should fail\n");
-    todo_wine ok(GetLastError() == ERROR_PIPE_LISTENING, "got %d should be ERROR_PIPE_LISTENING\n", GetLastError());
+    ok(GetLastError() == ERROR_PIPE_LISTENING, "got %d should be ERROR_PIPE_LISTENING\n", GetLastError());
     if (GetLastError() == ERROR_IO_PENDING)
         CancelIo(pipewrite);
 
@@ -4044,7 +4044,7 @@ static void test_nowait(void)
     ok(DisconnectNamedPipe(pipewrite) == TRUE, "DisconnectNamedPipe should succeed\n");
     SetLastError(0xdeadbeef);
     ok(ConnectNamedPipe(pipewrite,&ol) == FALSE, "ConnectNamedPipe should fail\n");
-    todo_wine ok(GetLastError() == ERROR_PIPE_LISTENING, "got %d should be ERROR_PIPE_LISTENING\n", GetLastError());
+    ok(GetLastError() == ERROR_PIPE_LISTENING, "got %d should be ERROR_PIPE_LISTENING\n", GetLastError());
     if (GetLastError() == ERROR_IO_PENDING)
         CancelIo(pipewrite);
     ok(CloseHandle(ol.hEvent), "CloseHandle for the event failed\n");

server/named_pipe.c

@@ -1106,6 +1106,11 @@ static int pipe_server_ioctl( struct fd *fd, ioctl_code_t code, struct async *as
             return 0;
         }
 
+        if (server->pipe_end.flags & NAMED_PIPE_NONBLOCKING_MODE)
+        {
+            set_error( STATUS_PIPE_LISTENING );
+            return 0;
+        }
         queue_async( &server->listen_q, async );
         async_wake_up( &server->pipe_end.pipe->waiters, STATUS_SUCCESS );
         set_error( STATUS_PENDING );