Don't kick player on double login (FAForever#1030)

server/lobbyconnection.py

@@ -648,6 +648,26 @@ async def on_player_login(
         if not conforms_policy:
             return
 
+        old_player = self.player_service.get_player(player_id)
+        if old_player:
+            self._logger.debug(
+                "player %s already signed in: %s",
+                player_id, old_player
+            )
+            if old_player.lobby_connection is self:
+                await self.send_warning(
+                    "You are already signed in from this location!"
+                )
+                return
+            elif old_player.lobby_connection is not None:
+                with contextlib.suppress(DisconnectedError):
+                    old_player.lobby_connection.write_warning(
+                        "You have been signed out because you signed in "
+                        "elsewhere.",
+                        fatal=True,
+                        style="kick"
+                    )
+
         self._logger.info(
             "Login from: %s(id=%s), using method '%s' for session %s",
             username,
@@ -675,22 +695,6 @@ async def on_player_login(
             lobby_connection=self,
             leaderboards=self.rating_service.leaderboards
         )
-
-        old_player = self.player_service.get_player(self.player.id)
-        if old_player:
-            self._logger.debug(
-                "player %s already signed in: %s",
-                self.player.id, old_player
-            )
-            if old_player.lobby_connection is not None:
-                with contextlib.suppress(DisconnectedError):
-                    old_player.lobby_connection.write_warning(
-                        "You have been signed out because you signed in "
-                        "elsewhere.",
-                        fatal=True,
-                        style="kick"
-                    )
-
         await self.player_service.fetch_player_data(self.player)
 
         self.player_service[self.player.id] = self.player

tests/integration_tests/test_login.py

@@ -3,6 +3,8 @@
 import jwt
 import pytest
 
+from tests.utils import fast_forward
+
 from .conftest import (
     connect_and_sign_in,
     connect_client,
@@ -244,26 +246,41 @@ async def test_policy_server_contacted(lobby_server, policy_server, player_servi
     policy_server.verify.assert_called_once()
 
 
+@fast_forward(15)
 async def test_server_login_double(lobby_server):
     proto = await connect_client(lobby_server)
     await perform_login(proto, ("test", "test_password"))
-    msg = await proto.read_message()
-    msg["command"] == "welcome"
+    await read_until_command(proto, "game_info", timeout=5)
 
     # Sign in again with a new protocol object
     proto2 = await connect_client(lobby_server)
     await perform_login(proto2, ("test", "test_password"))
-    msg = await proto2.read_message()
-    msg["command"] == "welcome"
+    await read_until_command(proto2, "welcome", timeout=5)
 
-    msg = await read_until_command(proto, "notice")
+    msg = await read_until_command(proto, "notice", timeout=10)
     assert msg == {
         "command": "notice",
         "style": "kick",
         "text": "You have been signed out because you signed in elsewhere."
     }
 
 
+@fast_forward(20)
+async def test_server_login_double_message(lobby_server):
+    proto = await connect_client(lobby_server)
+    await perform_login(proto, ("test", "test_password"))
+    await read_until_command(proto, "game_info", timeout=5)
+
+    # Sign in again with the same connection
+    await perform_login(proto, ("test", "test_password"))
+    msg = await read_until_command(proto, "notice", timeout=10)
+    assert msg == {
+        "command": "notice",
+        "style": "info",
+        "text": "You are already signed in from this location!"
+    }
+
+
 async def test_server_login_token_valid(lobby_server, jwk_priv_key, jwk_kid, fixed_time):
     proto = await connect_client(lobby_server)
     await proto.send_message({