diff options
| -rw-r--r-- | changelog.d/3968.bugfix | 1 | ||||
| -rw-r--r-- | synapse/handlers/federation.py | 58 | ||||
| -rw-r--r-- | tests/test_federation.py | 106 |
3 files changed, 47 insertions, 118 deletions
diff --git a/changelog.d/3968.bugfix b/changelog.d/3968.bugfix new file mode 100644 index 0000000000..18d43cd64e --- /dev/null +++ b/changelog.d/3968.bugfix @@ -0,0 +1 @@ +Fix exceptions when processing incoming events over federation \ No newline at end of file diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py index 38bebbf598..d05b63673f 100644 --- a/synapse/handlers/federation.py +++ b/synapse/handlers/federation.py @@ -106,7 +106,7 @@ class FederationHandler(BaseHandler): self.hs = hs - self.store = hs.get_datastore() + self.store = hs.get_datastore() # type: synapse.storage.DataStore self.federation_client = hs.get_federation_client() self.state_handler = hs.get_state_handler() self.server_name = hs.hostname @@ -323,14 +323,22 @@ class FederationHandler(BaseHandler): affected=pdu.event_id, ) - # Calculate the state of the previous events, and - # de-conflict them to find the current state. - state_groups = [] + # Calculate the state after each of the previous events, and + # resolve them to find the correct state at the current event. auth_chains = set() + event_map = { + event_id: pdu, + } try: # Get the state of the events we know about - ours = yield self.store.get_state_groups(room_id, list(seen)) - state_groups.append(ours) + ours = yield self.store.get_state_groups_ids(room_id, seen) + + # state_maps is a list of mappings from (type, state_key) to event_id + # type: list[dict[tuple[str, str], str]] + state_maps = list(ours.values()) + + # we don't need this any more, let's delete it. + del ours # Ask the remote server for the states we don't # know about @@ -350,28 +358,54 @@ class FederationHandler(BaseHandler): ) ) + # we want the state *after* p; get_state_for_room returns the + # state *before* p. + remote_event = yield self.federation_client.get_pdu( + [origin], p, outlier=True, + ) + + if remote_event is None: + raise Exception( + "Unable to get missing prev_event %s" % (p, ) + ) + + if remote_event.is_state(): + remote_state.append(remote_event) + # XXX hrm I'm not convinced that duplicate events will compare # for equality, so I'm not sure this does what the author # hoped. auth_chains.update(got_auth_chain) - state_group = { + remote_state_map = { (x.type, x.state_key): x.event_id for x in remote_state } - state_groups.append(state_group) + state_maps.append(remote_state_map) + + for x in remote_state: + event_map[x.event_id] = x # Resolve any conflicting state + @defer.inlineCallbacks def fetch(ev_ids): - return self.store.get_events( - ev_ids, get_prev_content=False, check_redacted=False + fetched = yield self.store.get_events( + ev_ids, get_prev_content=False, check_redacted=False, ) + # add any events we fetch here to the `event_map` so that we + # can use them to build the state event list below. + event_map.update(fetched) + defer.returnValue(fetched) room_version = yield self.store.get_room_version(room_id) state_map = yield resolve_events_with_factory( - room_version, state_groups, {event_id: pdu}, fetch + room_version, state_maps, event_map, fetch, ) - state = (yield self.store.get_events(state_map.values())).values() + # we need to give _process_received_pdu the actual state events + # rather than event ids, so generate that now. + state = [ + event_map[e] for e in six.itervalues(state_map) + ] auth_chain = list(auth_chains) except Exception: logger.warn( diff --git a/tests/test_federation.py b/tests/test_federation.py index ff55c7a627..952a0a7b51 100644 --- a/tests/test_federation.py +++ b/tests/test_federation.py @@ -141,109 +141,3 @@ class MessageAcceptTests(unittest.TestCase): self.homeserver.datastore.get_latest_event_ids_in_room, self.room_id ) self.assertEqual(self.successResultOf(extrem)[0], "$join:test.serv") - - def test_cant_hide_past_history(self): - """ - If you send a message, you must be able to provide the direct - prev_events that said event references. - """ - - def post_json(destination, path, data, headers=None, timeout=0): - if path.startswith("/_matrix/federation/v1/get_missing_events/"): - return { - "events": [ - { - "room_id": self.room_id, - "sender": "@baduser:test.serv", - "event_id": "three:test.serv", - "depth": 1000, - "origin_server_ts": 1, - "type": "m.room.message", - "origin": "test.serv", - "content": "hewwo?", - "auth_events": [], - "prev_events": [("four:test.serv", {})], - } - ] - } - - self.http_client.post_json = post_json - - def get_json(destination, path, args, headers=None): - if path.startswith("/_matrix/federation/v1/state_ids/"): - d = self.successResultOf( - self.homeserver.datastore.get_state_ids_for_event("one:test.serv") - ) - - return succeed( - { - "pdu_ids": [ - y - for x, y in d.items() - if x == ("m.room.member", "@us:test") - ], - "auth_chain_ids": list(d.values()), - } - ) - - self.http_client.get_json = get_json - - # Figure out what the most recent event is - most_recent = self.successResultOf( - maybeDeferred( - self.homeserver.datastore.get_latest_event_ids_in_room, self.room_id - ) - )[0] - - # Make a good event - good_event = FrozenEvent( - { - "room_id": self.room_id, - "sender": "@baduser:test.serv", - "event_id": "one:test.serv", - "depth": 1000, - "origin_server_ts": 1, - "type": "m.room.message", - "origin": "test.serv", - "content": "hewwo?", - "auth_events": [], - "prev_events": [(most_recent, {})], - } - ) - - with LoggingContext(request="good_event"): - d = self.handler.on_receive_pdu( - "test.serv", good_event, sent_to_us_directly=True - ) - self.reactor.advance(1) - self.assertEqual(self.successResultOf(d), None) - - bad_event = FrozenEvent( - { - "room_id": self.room_id, - "sender": "@baduser:test.serv", - "event_id": "two:test.serv", - "depth": 1000, - "origin_server_ts": 1, - "type": "m.room.message", - "origin": "test.serv", - "content": "hewwo?", - "auth_events": [], - "prev_events": [("one:test.serv", {}), ("three:test.serv", {})], - } - ) - - with LoggingContext(request="bad_event"): - d = self.handler.on_receive_pdu( - "test.serv", bad_event, sent_to_us_directly=True - ) - self.reactor.advance(1) - - extrem = maybeDeferred( - self.homeserver.datastore.get_latest_event_ids_in_room, self.room_id - ) - self.assertEqual(self.successResultOf(extrem)[0], "two:test.serv") - - state = self.homeserver.get_state_handler().get_current_state_ids(self.room_id) - self.reactor.advance(1) - self.assertIn(("m.room.member", "@us:test"), self.successResultOf(state).keys()) |