Test GNS remote endpoint preservation

server/tests/test_gns_transport.py

@@ -5,7 +5,7 @@ from collections import deque
 
 import pytest
 
-from gns_transport import EventType, GnsServerTransport, GnsTransportError, SendResult
+from gns_transport import EventType, GnsServerTransport, GnsTransportError, RemoteEndpoint, SendResult
 
 
 class FakeFunction:
@@ -23,6 +23,7 @@ class FakeNativeBridge:
         self.events = deque()
         self.sent = []
         self.disconnects = []
+        self.endpoints = {42: (0x7F000001, 54321)}
         self.destroyed = False
         self.co_gns_server_create = FakeFunction(self._create)
         self.co_gns_server_destroy = FakeFunction(self._destroy)
@@ -31,6 +32,7 @@ class FakeNativeBridge:
         self.co_gns_server_poll = FakeFunction(self._poll)
         self.co_gns_server_send = FakeFunction(self._send)
         self.co_gns_server_disconnect = FakeFunction(self._disconnect)
+        self.co_gns_server_remote_ipv4 = FakeFunction(self._remote_ipv4)
 
     def _create(self, host, port, out_handle, error_buffer, error_size):
         assert host == b"127.0.0.1"
@@ -66,6 +68,15 @@ class FakeNativeBridge:
         self.disconnects.append((connection_id, reason, debug))
         return 1
 
+    def _remote_ipv4(self, handle, connection_id, out_ipv4, out_port):
+        endpoint = self.endpoints.get(connection_id)
+        if endpoint is None:
+            return 0
+        ipv4, port = endpoint
+        ctypes.cast(out_ipv4, ctypes.POINTER(ctypes.c_uint32))[0] = ipv4
+        ctypes.cast(out_port, ctypes.POINTER(ctypes.c_uint16))[0] = port
+        return 1
+
 
 def test_wrapper_polls_message_events_without_line_framing():
     native = FakeNativeBridge()
@@ -75,6 +86,8 @@ def test_wrapper_polls_message_events_without_line_framing():
     transport = GnsServerTransport("127.0.0.1", 0, native_library=native)
     assert transport.local_port == 7777
     assert transport.connection_count == 2
+    assert transport.remote_endpoint(42) == RemoteEndpoint("127.0.0.1", 54321)
+    assert transport.remote_endpoint(99) is None
 
     connected = transport.poll()
     assert connected is not None