Add request length checking test cases for some Xinput 2.x requests

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>

test/xi2/protocol-xigetclientpointer.c

@@ -124,6 +124,11 @@ test_XIGetClientPointer(void)
     request.win = INVALID_WINDOW_ID;
     request_XIGetClientPointer(&client_request, &request, BadWindow);
 
+    printf("Testing invalid length\n");
+    client_request.req_len -= 4;
+    request_XIGetClientPointer(&client_request, &request, BadLength);
+    client_request.req_len += 4;
+
     test_data.cp_is_set = FALSE;
 
     printf("Testing window None, unset ClientPointer.\n");

test/xi2/protocol-xipassivegrabdevice.c

@@ -139,6 +139,7 @@ request_XIPassiveGrabDevice(ClientPtr client, xXIPassiveGrabDeviceReq * req,
     int local_modifiers;
     int mask_len;
 
+    client_request.req_len = req->length;
     rc = ProcXIPassiveGrabDevice(&client_request);
     assert(rc == error);
 
@@ -190,6 +191,13 @@ test_XIPassiveGrabDevice(void)
     request_XIPassiveGrabDevice(&client_request, request, BadDevice,
                                 request->deviceid);
 
+    printf("Testing invalid length\n");
+    request->length -= 2;
+    request_XIPassiveGrabDevice(&client_request, request, BadLength,
+                                client_request.errorValue);
+    /* re-init request since swapped length test leaves some values swapped */
+    request_init(request, XIPassiveGrabDevice);
+    request->grab_window = CLIENT_WINDOW_ID;
     request->deviceid = XIAllMasterDevices;
 
     printf("Testing invalid grab types\n");

test/xi2/protocol-xiquerypointer.c

@@ -201,6 +201,10 @@ test_XIQueryPointer(void)
     test_data.dev = devices.mouse;
     request.deviceid = devices.mouse->id;
     request_XIQueryPointer(&client_request, &request, Success);
+
+    /* test REQUEST_SIZE_MATCH */
+    client_request.req_len -= 4;
+    request_XIQueryPointer(&client_request, &request, BadLength);
 }
 
 int

test/xi2/protocol-xiwarppointer.c

@@ -198,6 +198,9 @@ test_XIWarpPointer(void)
     request_XIWarpPointer(&client_request, &request, Success);
 
     /* FIXME: src_x/y checks */
+
+    client_request.req_len -= 2; /* invalid length */
+    request_XIWarpPointer(&client_request, &request, BadLength);
 }
 
 int