virtual-device: Add support for reporting device Retry "errors"

libfprint/drivers/virtual-device-storage.c

@@ -72,6 +72,10 @@ dev_identify (FpDevice *dev)
                                   new_scan,
                                   NULL);
     }
+  else if (error && error->domain == FP_DEVICE_RETRY)
+    {
+      fpi_device_identify_report (dev, NULL, NULL, g_steal_pointer (&error));
+    }
 
   fpi_device_identify_complete (dev, g_steal_pointer (&error));
 }

libfprint/drivers/virtual-device.c

@@ -38,6 +38,7 @@ G_DEFINE_TYPE (FpDeviceVirtualDevice, fpi_device_virtual_device, FP_TYPE_DEVICE)
 #define REMOVE_CMD_PREFIX "REMOVE "
 #define SCAN_CMD_PREFIX "SCAN "
 #define ERROR_CMD_PREFIX "ERROR "
+#define RETRY_CMD_PREFIX "RETRY "
 
 #define LIST_CMD "LIST"
 
@@ -111,6 +112,14 @@ process_cmds (FpDeviceVirtualDevice * self,
           g_propagate_error (error,
                              fpi_device_error_new (g_ascii_strtoull (cmd + strlen (ERROR_CMD_PREFIX), NULL, 10)));
 
+          g_ptr_array_remove_index (self->pending_commands, 0);
+          return NULL;
+        }
+      else if (g_str_has_prefix (cmd, RETRY_CMD_PREFIX))
+        {
+          g_propagate_error (error,
+                             fpi_device_retry_new (g_ascii_strtoull (cmd + strlen (RETRY_CMD_PREFIX), NULL, 10)));
+
           g_ptr_array_remove_index (self->pending_commands, 0);
           return NULL;
         }
@@ -302,6 +311,9 @@ dev_verify (FpDevice *dev)
       g_debug ("Virtual device scan failed with error: %s", error->message);
     }
 
+  if (error && error->domain == FP_DEVICE_RETRY)
+    fpi_device_verify_report (dev, FPI_MATCH_ERROR, NULL, g_steal_pointer (&error));
+
   fpi_device_verify_complete (dev, g_steal_pointer (&error));
 }
 
@@ -337,7 +349,10 @@ dev_enroll (FpDevice *dev)
     }
   else
     {
-      fpi_device_enroll_complete (dev, NULL, g_steal_pointer (&error));
+      if (error && error->domain == FP_DEVICE_RETRY)
+        fpi_device_enroll_progress (dev, 0, NULL, g_steal_pointer (&error));
+      else
+        fpi_device_enroll_complete (dev, NULL, g_steal_pointer (&error));
     }
 }
 

tests/virtual-device.py

@@ -93,7 +93,7 @@ class VirtualDevice(unittest.TestCase):
         super().tearDown()
 
     def send_command(self, command, *args):
-        self.assertIn(command, ['INSERT', 'REMOVE', 'SCAN', 'ERROR'])
+        self.assertIn(command, ['INSERT', 'REMOVE', 'SCAN', 'ERROR', 'RETRY'])
 
         with Connection(self.sockaddr) as con:
             params = ' '.join(str(p) for p in args)
@@ -133,6 +133,8 @@ class VirtualDevice(unittest.TestCase):
             self.send_command('SCAN', scan_nick)
         elif isinstance(scan_nick, FPrint.DeviceError):
             self.send_command('ERROR', int(scan_nick))
+        elif isinstance(scan_nick, FPrint.DeviceRetry):
+            self.send_command('RETRY', int(scan_nick))
 
         def verify_cb(dev, res):
             try:
@@ -186,6 +188,10 @@ class VirtualDevice(unittest.TestCase):
         with self.assertRaisesRegex(GLib.Error, r"An unspecified error occurred"):
             self.check_verify(matching, FPrint.DeviceError.GENERAL, match=False)
 
+    def test_enroll_verify_retry(self):
+        with self.assertRaisesRegex(GLib.GError, 'too short'):
+            self.check_verify(FPrint.Print.new(self.dev),
+                FPrint.DeviceRetry.TOO_SHORT, match=False)
 
 class VirtualDeviceStorage(VirtualDevice):