diff options
Diffstat (limited to 'synapse/handlers/federation.py')
| -rw-r--r-- | synapse/handlers/federation.py | 100 |
1 files changed, 56 insertions, 44 deletions
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py index 8cafcfdab0..d3267734f7 100644 --- a/synapse/handlers/federation.py +++ b/synapse/handlers/federation.py @@ -97,9 +97,9 @@ class FederationHandler(BaseHandler): """Handles events that originated from federation. Responsible for: a) handling received Pdus before handing them on as Events to the rest - of the home server (including auth and state conflict resoultion) + of the homeserver (including auth and state conflict resoultion) b) converting events that were produced by local clients that may need - to be sent to remote home servers. + to be sent to remote homeservers. c) doing the necessary dances to invite remote users and join remote rooms. """ @@ -1428,9 +1428,9 @@ class FederationHandler(BaseHandler): return event @defer.inlineCallbacks - def do_remotely_reject_invite(self, target_hosts, room_id, user_id): + def do_remotely_reject_invite(self, target_hosts, room_id, user_id, content): origin, event, event_format_version = yield self._make_and_verify_event( - target_hosts, room_id, user_id, "leave" + target_hosts, room_id, user_id, "leave", content=content, ) # Mark as outlier as we don't have any state for this event; we're not # even in the room. @@ -1688,7 +1688,11 @@ class FederationHandler(BaseHandler): # hack around with a try/finally instead. success = False try: - if not event.internal_metadata.is_outlier() and not backfilled: + if ( + not event.internal_metadata.is_outlier() + and not backfilled + and not context.rejected + ): yield self.action_generator.handle_push_actions_for_event( event, context ) @@ -2036,8 +2040,10 @@ class FederationHandler(BaseHandler): auth_events (dict[(str, str)->synapse.events.EventBase]): Map from (event_type, state_key) to event - What we expect the event's auth_events to be, based on the event's - position in the dag. I think? maybe?? + Normally, our calculated auth_events based on the state of the room + at the event's position in the DAG, though occasionally (eg if the + event is an outlier), may be the auth events claimed by the remote + server. Also NB that this function adds entries to it. Returns: @@ -2087,30 +2093,35 @@ class FederationHandler(BaseHandler): origin (str): event (synapse.events.EventBase): context (synapse.events.snapshot.EventContext): + auth_events (dict[(str, str)->synapse.events.EventBase]): + Map from (event_type, state_key) to event + + Normally, our calculated auth_events based on the state of the room + at the event's position in the DAG, though occasionally (eg if the + event is an outlier), may be the auth events claimed by the remote + server. + + Also NB that this function adds entries to it. Returns: defer.Deferred[EventContext]: updated context """ event_auth_events = set(event.auth_event_ids()) - if event.is_state(): - event_key = (event.type, event.state_key) - else: - event_key = None - - # if the event's auth_events refers to events which are not in our - # calculated auth_events, we need to fetch those events from somewhere. - # - # we start by fetching them from the store, and then try calling /event_auth/. + # missing_auth is the set of the event's auth_events which we don't yet have + # in auth_events. missing_auth = event_auth_events.difference( e.event_id for e in auth_events.values() ) + # if we have missing events, we need to fetch those events from somewhere. + # + # we start by checking if they are in the store, and then try calling /event_auth/. if missing_auth: # TODO: can we use store.have_seen_events here instead? have_events = yield self.store.get_seen_events_with_rejections(missing_auth) - logger.debug("Got events %s from store", have_events) + logger.debug("Found events %s in the store", have_events) missing_auth.difference_update(have_events.keys()) else: have_events = {} @@ -2165,15 +2176,17 @@ class FederationHandler(BaseHandler): event.auth_event_ids() ) except Exception: - # FIXME: logger.exception("Failed to get auth chain") if event.internal_metadata.is_outlier(): + # XXX: given that, for an outlier, we'll be working with the + # event's *claimed* auth events rather than those we calculated: + # (a) is there any point in this test, since different_auth below will + # obviously be empty + # (b) alternatively, why don't we do it earlier? logger.info("Skipping auth_event fetch for outlier") return context - # FIXME: Assumes we have and stored all the state for all the - # prev_events different_auth = event_auth_events.difference( e.event_id for e in auth_events.values() ) @@ -2187,27 +2200,22 @@ class FederationHandler(BaseHandler): different_auth, ) + # now we state-resolve between our own idea of the auth events, and the remote's + # idea of them. + room_version = yield self.store.get_room_version(event.room_id) + different_event_ids = [ + d for d in different_auth if d in have_events and not have_events[d] + ] - different_events = yield make_deferred_yieldable( - defer.gatherResults( - [ - run_in_background( - self.store.get_event, d, allow_none=True, allow_rejected=False - ) - for d in different_auth - if d in have_events and not have_events[d] - ], - consumeErrors=True, - ) - ).addErrback(unwrapFirstError) + if different_event_ids: + # XXX: currently this checks for redactions but I'm not convinced that is + # necessary? + different_events = yield self.store.get_events_as_list(different_event_ids) - if different_events: local_view = dict(auth_events) remote_view = dict(auth_events) - remote_view.update( - {(d.type, d.state_key): d for d in different_events if d} - ) + remote_view.update({(d.type, d.state_key): d for d in different_events}) new_state = yield self.state_handler.resolve_events( room_version, @@ -2227,13 +2235,13 @@ class FederationHandler(BaseHandler): auth_events.update(new_state) context = yield self._update_context_for_auth_events( - event, context, auth_events, event_key + event, context, auth_events ) return context @defer.inlineCallbacks - def _update_context_for_auth_events(self, event, context, auth_events, event_key): + def _update_context_for_auth_events(self, event, context, auth_events): """Update the state_ids in an event context after auth event resolution, storing the changes as a new state group. @@ -2242,18 +2250,21 @@ class FederationHandler(BaseHandler): context (synapse.events.snapshot.EventContext): initial event context - auth_events (dict[(str, str)->str]): Events to update in the event + auth_events (dict[(str, str)->EventBase]): Events to update in the event context. - event_key ((str, str)): (type, state_key) for the current event. - this will not be included in the current_state in the context. - Returns: Deferred[EventContext]: new event context """ + # exclude the state key of the new event from the current_state in the context. + if event.is_state(): + event_key = (event.type, event.state_key) + else: + event_key = None state_updates = { k: a.event_id for k, a in iteritems(auth_events) if k != event_key } + current_state_ids = yield context.get_current_state_ids(self.store) current_state_ids = dict(current_state_ids) @@ -2276,6 +2287,7 @@ class FederationHandler(BaseHandler): return EventContext.with_state( state_group=state_group, + state_group_before_event=context.state_group_before_event, current_state_ids=current_state_ids, prev_state_ids=prev_state_ids, prev_group=prev_group, @@ -2454,7 +2466,7 @@ class FederationHandler(BaseHandler): room_version, event_dict, event, context ) - EventValidator().validate_new(event) + EventValidator().validate_new(event, self.config) # We need to tell the transaction queue to send this out, even # though the sender isn't a local user. @@ -2569,7 +2581,7 @@ class FederationHandler(BaseHandler): event, context = yield self.event_creation_handler.create_new_client_event( builder=builder ) - EventValidator().validate_new(event) + EventValidator().validate_new(event, self.config) return (event, context) @defer.inlineCallbacks |