From cf4624ee8eb56f5d9d3e9a064407415ef578b696 Mon Sep 17 00:00:00 2001
From: Ian Good <ian@icgood.net>
Date: Sat, 12 Aug 2023 23:13:57 -0400
Subject: [PATCH] Add MTU size to UdpConfig

---
 swimprotocol/udp/__init__.py | 18 +++---------------
 1 file changed, 3 insertions(+), 15 deletions(-)

diff --git a/swimprotocol/udp/__init__.py b/swimprotocol/udp/__init__.py
index 17b0c61..6df1bc5 100644
--- a/swimprotocol/udp/__init__.py
+++ b/swimprotocol/udp/__init__.py
@@ -48,6 +48,7 @@ def __init__(self, *, bind_host: Optional[str] = None,
                  default_host: Optional[str] = None,
                  default_port: Optional[int] = None,
                  discovery: bool = False,
+                 mtu_size: int = 1500,
                  **kwargs: Any) -> None:
         address_parser = AddressParser(
             default_host=default_host,
@@ -58,6 +59,7 @@ def __init__(self, *, bind_host: Optional[str] = None,
         self.bind_host: Final = bind_host
         self.bind_port: Final = bind_port
         self.address_parser: Final = address_parser
+        self.mtu_size: Final = mtu_size
 
     @classmethod
     def add_arguments(cls, parser: ArgumentParser, *,
@@ -213,7 +215,7 @@ async def _run_send(self, thread_pool: ThreadPoolExecutor,
         packet_data = await loop.run_in_executor(
             thread_pool, self.udp_pack.pack, packet)
         address = self.address_parser.parse(member.name)
-        if len(packet_data) <= 1500:
+        if len(packet_data) <= self.config.mtu_size:
             udp_transport.sendto(packet_data, (address.host, address.port))
         else:
             asyncio.create_task(self._tcp_send(packet_data, address))
@@ -225,20 +227,6 @@ async def _tcp_send(self, packet_data: bytes, address: Address) -> None:
         with closing(tcp_transport):
             tcp_transport.write(packet_data)
 
-    @classmethod
-    def add_arguments(cls, name: str, parser: ArgumentParser, *,
-                      prefix: str = '--udp') -> None:
-        group = parser.add_argument_group(f'{name} options')
-        group.add_argument(f'{prefix}-bind', metavar='INTERFACE',
-                           dest='swim_udp_bind',
-                           help='The bind IP address.')
-        group.add_argument(f'{prefix}-host', metavar='NAME',
-                           dest='swim_udp_host',
-                           help='The default remote hostname.')
-        group.add_argument(f'{prefix}-port', metavar='NUM', type=int,
-                           dest='swim_udp_port',
-                           help='The default port number.')
-
 
 class _BaseProtocol(Subtasks):