Fix radio message argument parsing crash

src/methods.cpp

@@ -2445,13 +2445,13 @@ PyObject* meth_write_sdcard(
 PyObject* meth_create_neovi_radio_message(PyObject* self, PyObject* args, PyObject* keywords)
 {
     (void)self;
-    int relay1 = 0;
-    int relay2 = 0;
-    int relay3 = 0;
-    int relay4 = 0;
-    int relay5 = 0;
-    int led5 = 0;
-    int led6 = 0;
+    unsigned char relay1 = 0;
+    unsigned char relay2 = 0;
+    unsigned char relay3 = 0;
+    unsigned char relay4 = 0;
+    unsigned char relay5 = 0;
+    unsigned char led5 = 0;
+    unsigned char led6 = 0;
     int msb = 0;
     int lsb = 0;
     int analog = 0;
@@ -2461,7 +2461,7 @@ PyObject* meth_create_neovi_radio_message(PyObject* self, PyObject* args, PyObje
 #endif
         char* kwords[] = { "Relay1",       "Relay2", "Relay3",          "Relay4",          "Relay5",
                            "LED5",         "LED6",   "MSB_report_rate", "LSB_report_rate", "analog_change_report_rate",
-                           "relay_timeout" };
+                           "relay_timeout", NULL };
     // Accepts keywords: Relay1-Relay5 (boolean), LED5 (boolean), LED6 (boolean), MSB_report_rate (int),
     // LSB_report_rate (int), analog_change_report_rate (int), relay_timeout (int).
     if (!PyArg_ParseTupleAndKeywords(args,

tests/test_radio_message.py

@@ -0,0 +1,65 @@
+"""Hardware-independent radio message parsing regressions.
+
+Run each call in a child process so native parser crashes become test failures.
+"""
+
+import os
+import subprocess
+import sys
+
+import pytest
+
+
+@pytest.mark.parametrize(
+    "code",
+    [
+        "assert ics.create_neovi_radio_message() == (0, 0, 0, 0, 0)",
+        """assert ics.create_neovi_radio_message(
+            Relay1=1, Relay2=0, Relay3=2, Relay4=0, Relay5=255,
+            LED5=0, LED6=1, MSB_report_rate=0x123, LSB_report_rate=0x45,
+            analog_change_report_rate=0x67, relay_timeout=0x89,
+        ) == (0x55, 0x23, 0x45, 0x67, 0x89)""",
+        "assert ics.create_neovi_radio_message(0, 1, 0, 1, 0, 1, 0, 255, 128, 1, 2) == (0x2A, 255, 128, 1, 2)",
+        "assert ics.create_neovi_radio_message(relay_timeout=255) == (0, 0, 0, 0, 255)",
+        """try:
+    ics.create_neovi_radio_message(unknown=1)
+except TypeError:
+    pass
+else:
+    raise AssertionError('unknown keyword was accepted')""",
+        *[
+            f"""try:
+    ics.create_neovi_radio_message(**{{{name!r}: {value!r}}})
+except {error}:
+    pass
+else:
+    raise AssertionError('invalid argument was accepted')"""
+            for name in ("Relay1", "Relay2", "Relay3", "Relay4", "Relay5", "LED5", "LED6")
+            for value, error in ((-1, "OverflowError"), (256, "OverflowError"), ("bad", "TypeError"))
+        ],
+    ],
+    ids=["defaults", "all-keywords", "positional", "last-keyword", "unknown-keyword"]
+    + [
+        f"{name}-{case}"
+        for name in ("Relay1", "Relay2", "Relay3", "Relay4", "Relay5", "LED5", "LED6")
+        for case in ("negative", "overflow", "non-integer")
+    ],
+)
+def test_create_neovi_radio_message_subprocess(code):
+    env = os.environ.copy()
+    # Preserve the test runner's import path, including an in-place extension.
+    env["PYTHONPATH"] = os.pathsep.join(sys.path)
+    prelude = "import ics\n"
+    if sys.platform == "win32":
+        # Suppress Windows Error Reporting dialogs when testing a broken build.
+        prelude = "import ctypes\nctypes.windll.kernel32.SetErrorMode(3)\n" + prelude
+    result = subprocess.run(
+        [sys.executable, "-c", prelude + code],
+        env=env,
+        capture_output=True,
+        text=True,
+        timeout=30,
+    )
+    assert result.returncode == 0, (
+        f"child exited with {result.returncode}\nstdout: {result.stdout}\nstderr: {result.stderr}"
+    )