some validation

kvmd/apps/__init__.py

@@ -68,6 +68,8 @@ from ..validators.kvm import valid_stream_quality
 from ..validators.kvm import valid_stream_fps
 
 from ..validators.hw import valid_gpio_pin_optional
+from ..validators.hw import valid_otg_gadget
+from ..validators.hw import valid_otg_id
 
 
 # =====
@@ -247,9 +249,9 @@ def _get_config_scheme() -> Dict:
         },
 
         "otg": {
-            "gadget":        Option("kvmd"),
+            "gadget":        Option("kvmd", type=valid_otg_gadget),
-            "vendor_id":     Option(0x1D6B, type=valid_number),  # Linux Foundation
+            "vendor_id":     Option(0x1D6B, type=valid_otg_id),  # Linux Foundation
-            "product_id":    Option(0x0104, type=valid_number),  # Multifunction Composite Gadget
+            "product_id":    Option(0x0104, type=valid_otg_id),  # Multifunction Composite Gadget
             "manufacturer":  Option("Pi-KVM"),
             "product":       Option("Composite KVM Device"),
             "serial_number": Option("CAFEBABE"),

kvmd/validators/hw.py

@@ -23,6 +23,7 @@
 from typing import Any
 
 from . import check_in_list
+from . import check_re_match
 
 from .basic import valid_number
 
@@ -40,3 +41,11 @@ def valid_gpio_pin(arg: Any) -> int:
 
 def valid_gpio_pin_optional(arg: Any) -> int:
     return int(valid_number(arg, min=-1, name="optional GPIO pin"))
+
+
+def valid_otg_gadget(arg: Any) -> str:
+    return check_re_match(arg, "OTG gadget name", r"^[a-z_][a-z0-9_-]*$")[:255]
+
+
+def valid_otg_id(arg: Any) -> int:
+    return int(valid_number(arg, min=0, max=65535, name="OTG ID"))

testenv/tests/validators/test_hw.py

@@ -28,6 +28,8 @@ from kvmd.validators import ValidatorError
 from kvmd.validators.hw import valid_tty_speed
 from kvmd.validators.hw import valid_gpio_pin
 from kvmd.validators.hw import valid_gpio_pin_optional
+from kvmd.validators.hw import valid_otg_gadget
+from kvmd.validators.hw import valid_otg_id
 
 
 # =====
@@ -70,3 +72,45 @@ def test_ok__valid_gpio_pin_optional(arg: Any) -> None:
 def test_fail__valid_gpio_pin_optional(arg: Any) -> None:
     with pytest.raises(ValidatorError):
         print(valid_gpio_pin_optional(arg))
+
+
+# =====
+@pytest.mark.parametrize("arg", [
+    "test-",
+    "glados",
+    "test",
+    "_",
+    "_foo_bar_",
+    " aix",
+])
+def test_ok__valid_otg_gadget(arg: Any) -> None:
+    assert valid_otg_gadget(arg) == arg.strip()
+
+
+@pytest.mark.parametrize("arg", [
+    "тест",
+    "-molestia",
+    "te~st",
+    "-",
+    "-foo_bar",
+    "  ",
+    "",
+    None,
+])
+def test_fail__valid_otg_gadget(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_otg_gadget(arg))
+
+
+# =====
+@pytest.mark.parametrize("arg", ["0 ", 0, 1, 13, 65535])
+def test_ok__valid_otg_id(arg: Any) -> None:
+    value = valid_otg_id(arg)
+    assert type(value) == int  # pylint: disable=unidiomatic-typecheck
+    assert value == int(str(arg).strip())
+
+
+@pytest.mark.parametrize("arg", ["test", "", None, -1, -13, 1.1, 65534.5, 65536])
+def test_fail__valid_otg_id(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_otg_id(arg))