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Faster Remote Room Joins: tell remote homeservers that we are unable to authorise them if they query a room which has partial state on our server. (#13823)

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reivilibre 2022-09-23 10:47:16 +00:00 • committed by GitHub
parent ac7e5683d6
commit c06b2b7142
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11 changed files with 58 additions and 42 deletions
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34
synapse/handlers/federation.py
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@ -804,7 +804,7 @@ class FederationHandler:
)
# now check that we are *still* in the room
is_in_room = await self._event_auth_handler.check_host_in_room(
is_in_room = await self._event_auth_handler.is_host_in_room(
room_id, self.server_name
)
if not is_in_room:
@ -1150,9 +1150,7 @@ class FederationHandler:
async def on_backfill_request(
self, origin: str, room_id: str, pdu_list: List[str], limit: int
) -> List[EventBase]:
in_room = await self._event_auth_handler.check_host_in_room(room_id, origin)
if not in_room:
raise AuthError(403, "Host not in room.")
await self._event_auth_handler.assert_host_in_room(room_id, origin)
# Synapse asks for 100 events per backfill request. Do not allow more.
limit = min(limit, 100)
@ -1198,21 +1196,17 @@ class FederationHandler:
event_id, allow_none=True, allow_rejected=True
)
if event:
in_room = await self._event_auth_handler.check_host_in_room(
event.room_id, origin
)
if not in_room:
raise AuthError(403, "Host not in room.")
events = await filter_events_for_server(
self._storage_controllers, origin, [event]
)
event = events[0]
return event
else:
if not event:
return None
await self._event_auth_handler.assert_host_in_room(event.room_id, origin)
events = await filter_events_for_server(
self._storage_controllers, origin, [event]
)
event = events[0]
return event
async def on_get_missing_events(
self,
origin: str,
@ -1221,9 +1215,7 @@ class FederationHandler:
latest_events: List[str],
limit: int,
) -> List[EventBase]:
in_room = await self._event_auth_handler.check_host_in_room(room_id, origin)
if not in_room:
raise AuthError(403, "Host not in room.")
await self._event_auth_handler.assert_host_in_room(room_id, origin)
# Only allow up to 20 events to be retrieved per request.
limit = min(limit, 20)
@ -1257,7 +1249,7 @@ class FederationHandler:
"state_key": target_user_id,
}
if await self._event_auth_handler.check_host_in_room(room_id, self.hs.hostname):
if await self._event_auth_handler.is_host_in_room(room_id, self.hs.hostname):
room_version_obj = await self.store.get_room_version(room_id)
builder = self.event_builder_factory.for_room_version(
room_version_obj, event_dict