Add support for initial d zero

titles/idz/echo.py

@@ -0,0 +1,16 @@
+from twisted.internet.protocol import DatagramProtocol
+import logging
+
+from core.config import CoreConfig
+from .config import IDZConfig
+
+class IDZEcho(DatagramProtocol):
+    def __init__(self, cfg: CoreConfig, game_cfg: IDZConfig) -> None:
+        super().__init__()
+        self.core_config = cfg
+        self.game_config = game_cfg
+        self.logger = logging.getLogger("idz")
+
+    def datagramReceived(self, data, addr):
+        self.logger.debug(f"Echo from from {addr[0]}:{addr[1]} -> {self.transport.getHost().port} - {data.hex()}")
+        self.transport.write(data, addr)