Add transport-aware authoritative server

server/transport_server.py

@@ -0,0 +1,34 @@
+from __future__ import annotations
+
+from typing import Any
+
+from client_session import ClientSession
+from packet_codec import PacketCodecError, encode_packet
+from server_core import MAX_PACKET_CHARS, FalloutTogetherServer
+
+
+class TransportAwareFalloutTogetherServer(FalloutTogetherServer):
+    """Authoritative server with serialization separated from transport framing.
+
+    All gameplay validation and relay behavior stays in ``FalloutTogetherServer``.
+    Only the final outbound serialization boundary is replaced: TCP sessions add
+    line framing in ``ClientSession.send_packet`` while message transports receive
+    the raw encoded packet and delivery policy.
+    """
+
+    def _send_packet(self, client: ClientSession, packet: dict[str, Any], *, broadcast: bool = False) -> None:
+        try:
+            encoded = encode_packet(packet)
+        except PacketCodecError as error:
+            raise ValueError(str(error)) from error
+
+        uses_message_transport = callable(getattr(client.connection, "send_encoded", None))
+        if not uses_message_transport and len(encoded.payload) + 1 > MAX_PACKET_CHARS:
+            raise ValueError("Outbound TCP packet exceeds maximum line size")
+
+        client.send_packet(encoded)
+        client.record_sent(broadcast=broadcast)
+        with self._lock:
+            self._stats["packetsSent"] += 1
+            if broadcast:
+                self._stats["packetsBroadcast"] += 1