server: Improve error handling of disconnected named pipe clients.

dlls/kernel32/tests/pipe.c

@@ -1506,7 +1506,6 @@ static int test_DisconnectNamedPipe(void)
         ok(ret == WAIT_TIMEOUT, "WaitForSingleObject returned %X\n", ret);
 
         ret = PeekNamedPipe(hFile, NULL, 0, NULL, &readden, NULL);
-        todo_wine
         ok(!ret && GetLastError() == ERROR_PIPE_NOT_CONNECTED, "PeekNamedPipe returned %x (%u)\n",
            ret, GetLastError());
         ret = PeekNamedPipe(hnp, NULL, 0, NULL, &readden, NULL);

dlls/ntdll/tests/pipe.c

@@ -1348,7 +1348,6 @@ static void test_pipe_state(HANDLE pipe, BOOL is_server, DWORD state)
         expected_status = STATUS_PIPE_BROKEN;
         break;
     }
-    todo_wine_if(expected_status == STATUS_PIPE_DISCONNECTED)
     ok(status == expected_status, "status = %x, expected %x in %s state %u\n",
        status, expected_status, is_server ? "server" : "client", state);
     if (!status)
@@ -1363,7 +1362,6 @@ static void test_pipe_state(HANDLE pipe, BOOL is_server, DWORD state)
                                  buf, 1, buf+1, 1);
         if (!status || status == STATUS_PENDING)
             status = io.Status;
-        todo_wine_if(expected_status == STATUS_PIPE_DISCONNECTED)
         ok(status == expected_status,
             "NtFsControlFile(FSCTL_PIPE_TRANSCEIVE) failed in %s state %u: %x\n",
             is_server ? "server" : "client", state, status);
@@ -1373,7 +1371,6 @@ static void test_pipe_state(HANDLE pipe, BOOL is_server, DWORD state)
     status = NtFlushBuffersFile(pipe, &io);
     if (!is_server && state == FILE_PIPE_DISCONNECTED_STATE)
     {
-        todo_wine
         ok(status == STATUS_PIPE_DISCONNECTED, "status = %x in %s state %u\n",
            status, is_server ? "server" : "client", state);
     }
@@ -1472,7 +1469,6 @@ static void test_pipe_with_data_state(HANDLE pipe, BOOL is_server, DWORD state)
         expected_status = STATUS_BUFFER_OVERFLOW;
         break;
     }
-    todo_wine_if(expected_status == STATUS_PIPE_DISCONNECTED)
     ok(status == expected_status, "status = %x, expected %x in %s state %u\n",
        status, expected_status, is_server ? "server" : "client", state);
     if (status == STATUS_BUFFER_OVERFLOW)

server/named_pipe.c

@@ -501,6 +501,12 @@ static int pipe_end_flush( struct fd *fd, struct async *async )
 {
     struct pipe_end *pipe_end = get_fd_user( fd );
 
+    if (!pipe_end->pipe)
+    {
+        set_error( STATUS_PIPE_DISCONNECTED );
+        return 0;
+    }
+
     if (pipe_end->connection && !list_empty( &pipe_end->connection->message_queue ))
     {
         fd_queue_async( pipe_end->fd, async, ASYNC_TYPE_WAIT );
@@ -888,7 +894,7 @@ static int pipe_end_peek( struct pipe_end *pipe_end )
         set_error( STATUS_PIPE_BROKEN );
         return 0;
     default:
-        set_error( STATUS_INVALID_PIPE_STATE );
+        set_error( pipe_end->pipe ? STATUS_INVALID_PIPE_STATE : STATUS_PIPE_DISCONNECTED );
         return 0;
     }
 
@@ -932,7 +938,7 @@ static int pipe_end_transceive( struct pipe_end *pipe_end, struct async *async )
 
     if (!pipe_end->connection)
     {
-        set_error( STATUS_INVALID_PIPE_STATE );
+        set_error( pipe_end->pipe ? STATUS_INVALID_PIPE_STATE : STATUS_PIPE_DISCONNECTED );
         return 0;
     }