Support specifying which IP addresses to listen on

matter_server/server/__main__.py

@@ -13,6 +13,8 @@
 DEFAULT_VENDOR_ID = 0xFFF1
 DEFAULT_FABRIC_ID = 1
 DEFAULT_PORT = 5580
+# Default to None to bind to all addresses on both IPv4 and IPv6
+DEFAULT_LISTEN_ADDRESS = None
 DEFAULT_STORAGE_PATH = os.path.join(Path.home(), ".matter_server")
 
 # Get parsed passed in arguments.
@@ -45,6 +47,13 @@
     default=DEFAULT_PORT,
     help=f"TCP Port to run the websocket server, defaults to {DEFAULT_PORT}",
 )
+parser.add_argument(
+    "--listen-address",
+    type=str,
+    action="append",
+    default=DEFAULT_LISTEN_ADDRESS,
+    help="IP address to bind the websocket server to, defaults to listen on any interface (IPv4 and IPv6).",
+)
 parser.add_argument(
     "--log-level",
     type=str,
@@ -95,6 +104,7 @@ def main() -> None:
         int(args.vendorid),
         int(args.fabricid),
         int(args.port),
+        args.listen_address,
         args.primary_interface,
     )
 

matter_server/server/server.py

@@ -62,13 +62,15 @@ def __init__(
         vendor_id: int,
         fabric_id: int,
         port: int,
-        primary_interface: str | None,
+        listen_addresses: list[str] | None = None,
+        primary_interface: str | None = None,
     ) -> None:
         """Initialize the Matter Server."""
         self.storage_path = storage_path
         self.vendor_id = vendor_id
         self.fabric_id = fabric_id
         self.port = port
+        self.listen_addresses = listen_addresses
         self.primary_interface = primary_interface
         self.logger = logging.getLogger(__name__)
         self.app = web.Application()
@@ -102,8 +104,9 @@ async def start(self) -> None:
         self.app.router.add_route("GET", "/", self._handle_info)
         self._runner = web.AppRunner(self.app, access_log=None)
         await self._runner.setup()
-        # set host to None to bind to all addresses on both IPv4 and IPv6
-        self._http = web.TCPSite(self._runner, host=None, port=self.port)
+        self._http = web.TCPSite(
+            self._runner, host=self.listen_addresses, port=self.port
+        )
         await self._http.start()
         self.logger.debug("Webserver initialized.")