diff options
Diffstat (limited to 'synapse/federation/federation_client.py')
| -rw-r--r-- | synapse/federation/federation_client.py | 33 |
1 files changed, 22 insertions, 11 deletions
diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py index 8493ffc2e5..0ac85a3be7 100644 --- a/synapse/federation/federation_client.py +++ b/synapse/federation/federation_client.py @@ -19,6 +19,7 @@ import itertools import logging from typing import ( TYPE_CHECKING, + AbstractSet, Awaitable, Callable, Collection, @@ -110,8 +111,9 @@ class SendJoinResult: # True if 'state' elides non-critical membership events partial_state: bool - # if 'partial_state' is set, a list of the servers in the room (otherwise empty) - servers_in_room: List[str] + # If 'partial_state' is set, a set of the servers in the room (otherwise empty). + # Always contains the server we joined off. + servers_in_room: AbstractSet[str] class FederationClient(FederationBase): @@ -1152,15 +1154,24 @@ class FederationClient(FederationBase): % (auth_chain_create_events,) ) - if response.members_omitted and not response.servers_in_room: - raise InvalidResponseError( - "members_omitted was set, but no servers were listed in the room" - ) + servers_in_room = None + if response.servers_in_room is not None: + servers_in_room = set(response.servers_in_room) - if response.members_omitted and not partial_state: - raise InvalidResponseError( - "members_omitted was set, but we asked for full state" - ) + if response.members_omitted: + if not servers_in_room: + raise InvalidResponseError( + "members_omitted was set, but no servers were listed in the room" + ) + + if not partial_state: + raise InvalidResponseError( + "members_omitted was set, but we asked for full state" + ) + + # `servers_in_room` is supposed to be a complete list. + # Fix things up in case the remote homeserver is badly behaved. + servers_in_room.add(destination) return SendJoinResult( event=event, @@ -1168,7 +1179,7 @@ class FederationClient(FederationBase): auth_chain=signed_auth, origin=destination, partial_state=response.members_omitted, - servers_in_room=response.servers_in_room or [], + servers_in_room=servers_in_room or frozenset(), ) # MSC3083 defines additional error codes for room joins. |