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-rw-r--r--synapse/api/constants.py1
-rw-r--r--synapse/config/api.py2
-rw-r--r--synapse/federation/federation_server.py16
-rw-r--r--synapse/handlers/room.py10
-rw-r--r--synapse/http/matrixfederationclient.py17
-rw-r--r--synapse/storage/state.py38
-rw-r--r--synapse/storage/user_directory.py16
7 files changed, 83 insertions, 17 deletions
diff --git a/synapse/api/constants.py b/synapse/api/constants.py
index fedfb92b3e..f47c33a074 100644
--- a/synapse/api/constants.py
+++ b/synapse/api/constants.py
@@ -73,6 +73,7 @@ class EventTypes(object):
     RoomHistoryVisibility = "m.room.history_visibility"
     CanonicalAlias = "m.room.canonical_alias"
     RoomAvatar = "m.room.avatar"
+    RoomEncryption = "m.room.encryption"
     GuestAccess = "m.room.guest_access"
 
     # These are used for validation
diff --git a/synapse/config/api.py b/synapse/config/api.py
index 403d96ba76..9f25bbc5cb 100644
--- a/synapse/config/api.py
+++ b/synapse/config/api.py
@@ -24,6 +24,7 @@ class ApiConfig(Config):
             EventTypes.JoinRules,
             EventTypes.CanonicalAlias,
             EventTypes.RoomAvatar,
+            EventTypes.RoomEncryption,
             EventTypes.Name,
         ])
 
@@ -36,5 +37,6 @@ class ApiConfig(Config):
             - "{JoinRules}"
             - "{CanonicalAlias}"
             - "{RoomAvatar}"
+            - "{RoomEncryption}"
             - "{Name}"
         """.format(**vars(EventTypes))
diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py
index aeadc9c564..3da86d4ba6 100644
--- a/synapse/federation/federation_server.py
+++ b/synapse/federation/federation_server.py
@@ -148,6 +148,22 @@ class FederationServer(FederationBase):
 
         logger.debug("[%s] Transaction is new", transaction.transaction_id)
 
+        # Reject if PDU count > 50 and EDU count > 100
+        if (len(transaction.pdus) > 50
+                or (hasattr(transaction, "edus") and len(transaction.edus) > 100)):
+
+            logger.info(
+                "Transaction PDU or EDU count too large. Returning 400",
+            )
+
+            response = {}
+            yield self.transaction_actions.set_response(
+                origin,
+                transaction,
+                400, response
+            )
+            defer.returnValue((400, response))
+
         received_pdus_counter.inc(len(transaction.pdus))
 
         origin_host, _ = parse_server_name(origin)
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index 13ba9291b0..5e40e9ea46 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -263,6 +263,16 @@ class RoomCreationHandler(BaseHandler):
             }
         }
 
+        # Check if old room was non-federatable
+
+        # Get old room's create event
+        old_room_create_event = yield self.store.get_create_event_for_room(old_room_id)
+
+        # Check if the create event specified a non-federatable room
+        if not old_room_create_event.content.get("m.federate", True):
+            # If so, mark the new room as non-federatable as well
+            creation_content["m.federate"] = False
+
         initial_state = dict()
 
         # Replicate relevant room events
diff --git a/synapse/http/matrixfederationclient.py b/synapse/http/matrixfederationclient.py
index bb2e64ed80..5ee4d528d2 100644
--- a/synapse/http/matrixfederationclient.py
+++ b/synapse/http/matrixfederationclient.py
@@ -28,7 +28,7 @@ from canonicaljson import encode_canonical_json
 from prometheus_client import Counter
 from signedjson.sign import sign_json
 
-from twisted.internet import defer, protocol
+from twisted.internet import defer, protocol, task
 from twisted.internet.error import DNSLookupError
 from twisted.internet.task import _EPSILON, Cooperator
 from twisted.web._newclient import ResponseDone
@@ -286,7 +286,7 @@ class MatrixFederationHttpClient(object):
                             json,
                         )
                         data = encode_canonical_json(json)
-                        producer = FileBodyProducer(
+                        producer = QuieterFileBodyProducer(
                             BytesIO(data),
                             cooperator=self._cooperator,
                         )
@@ -839,3 +839,16 @@ def encode_query_args(args):
     query_bytes = urllib.parse.urlencode(encoded_args, True)
 
     return query_bytes.encode('utf8')
+
+
+class QuieterFileBodyProducer(FileBodyProducer):
+    """Wrapper for FileBodyProducer that avoids CRITICAL errors when the connection drops.
+
+    Workaround for https://github.com/matrix-org/synapse/issues/4003 /
+    https://twistedmatrix.com/trac/ticket/6528
+    """
+    def stopProducing(self):
+        try:
+            FileBodyProducer.stopProducing(self)
+        except task.TaskStopped:
+            pass
diff --git a/synapse/storage/state.py b/synapse/storage/state.py
index c3ab7db7ae..d14a7b2538 100644
--- a/synapse/storage/state.py
+++ b/synapse/storage/state.py
@@ -428,13 +428,9 @@ class StateGroupWorkerStore(EventsWorkerStore, SQLBaseStore):
         """
         # for now we do this by looking at the create event. We may want to cache this
         # more intelligently in future.
-        state_ids = yield self.get_current_state_ids(room_id)
-        create_id = state_ids.get((EventTypes.Create, ""))
-
-        if not create_id:
-            raise NotFoundError("Unknown room %s" % (room_id))
 
-        create_event = yield self.get_event(create_id)
+        # Retrieve the room's create event
+        create_event = yield self.get_create_event_for_room(room_id)
         defer.returnValue(create_event.content.get("room_version", "1"))
 
     @defer.inlineCallbacks
@@ -447,19 +443,39 @@ class StateGroupWorkerStore(EventsWorkerStore, SQLBaseStore):
 
         Returns:
             Deferred[unicode|None]: predecessor room id
+
+        Raises:
+            NotFoundError if the room is unknown
+        """
+        # Retrieve the room's create event
+        create_event = yield self.get_create_event_for_room(room_id)
+
+        # Return predecessor if present
+        defer.returnValue(create_event.content.get("predecessor", None))
+
+    @defer.inlineCallbacks
+    def get_create_event_for_room(self, room_id):
+        """Get the create state event for a room.
+
+        Args:
+            room_id (str)
+
+        Returns:
+            Deferred[EventBase]: The room creation event.
+
+        Raises:
+            NotFoundError if the room is unknown
         """
         state_ids = yield self.get_current_state_ids(room_id)
         create_id = state_ids.get((EventTypes.Create, ""))
 
         # If we can't find the create event, assume we've hit a dead end
         if not create_id:
-            defer.returnValue(None)
+            raise NotFoundError("Unknown room %s" % (room_id))
 
-        # Retrieve the room's create event
+        # Retrieve the room's create event and return
         create_event = yield self.get_event(create_id)
-
-        # Return predecessor if present
-        defer.returnValue(create_event.content.get("predecessor", None))
+        defer.returnValue(create_event)
 
     @cached(max_entries=100000, iterable=True)
     def get_current_state_ids(self, room_id):
diff --git a/synapse/storage/user_directory.py b/synapse/storage/user_directory.py
index ce48212265..e8b574ee5e 100644
--- a/synapse/storage/user_directory.py
+++ b/synapse/storage/user_directory.py
@@ -22,6 +22,7 @@ from twisted.internet import defer
 
 from synapse.api.constants import EventTypes, JoinRules
 from synapse.storage.engines import PostgresEngine, Sqlite3Engine
+from synapse.storage.state import StateFilter
 from synapse.types import get_domain_from_id, get_localpart_from_id
 from synapse.util.caches.descriptors import cached, cachedInlineCallbacks
 
@@ -31,12 +32,19 @@ logger = logging.getLogger(__name__)
 
 
 class UserDirectoryStore(SQLBaseStore):
-    @cachedInlineCallbacks(cache_context=True)
-    def is_room_world_readable_or_publicly_joinable(self, room_id, cache_context):
+    @defer.inlineCallbacks
+    def is_room_world_readable_or_publicly_joinable(self, room_id):
         """Check if the room is either world_readable or publically joinable
         """
-        current_state_ids = yield self.get_current_state_ids(
-            room_id, on_invalidate=cache_context.invalidate
+
+        # Create a state filter that only queries join and history state event
+        types_to_filter = (
+            (EventTypes.JoinRules, ""),
+            (EventTypes.RoomHistoryVisibility, ""),
+        )
+
+        current_state_ids = yield self.get_filtered_current_state_ids(
+            room_id, StateFilter.from_types(types_to_filter),
         )
 
         join_rules_id = current_state_ids.get((EventTypes.JoinRules, ""))