diff options
Diffstat (limited to 'synapse/handlers/devicemessage.py')
| -rw-r--r-- | synapse/handlers/devicemessage.py | 65 |
1 files changed, 62 insertions, 3 deletions
diff --git a/synapse/handlers/devicemessage.py b/synapse/handlers/devicemessage.py index 0043cbea17..05c4b3eec0 100644 --- a/synapse/handlers/devicemessage.py +++ b/synapse/handlers/devicemessage.py @@ -14,12 +14,14 @@ # limitations under the License. import logging +from typing import Any, Dict from canonicaljson import json from twisted.internet import defer from synapse.api.errors import SynapseError +from synapse.logging.context import run_in_background from synapse.logging.opentracing import ( get_active_span_text_map, log_kv, @@ -47,12 +49,14 @@ class DeviceMessageHandler(object): "m.direct_to_device", self.on_direct_to_device_edu ) + self._device_list_updater = hs.get_device_handler().device_list_updater + @defer.inlineCallbacks def on_direct_to_device_edu(self, origin, content): local_messages = {} sender_user_id = content["sender"] if origin != get_domain_from_id(sender_user_id): - logger.warn( + logger.warning( "Dropping device message from %r with spoofed sender %r", origin, sender_user_id, @@ -65,6 +69,9 @@ class DeviceMessageHandler(object): logger.warning("Request for keys for non-local user %s", user_id) raise SynapseError(400, "Not a user here") + if not by_device: + continue + messages_by_device = { device_id: { "content": message_content, @@ -73,8 +80,11 @@ class DeviceMessageHandler(object): } for device_id, message_content in by_device.items() } - if messages_by_device: - local_messages[user_id] = messages_by_device + local_messages[user_id] = messages_by_device + + yield self._check_for_unknown_devices( + message_type, sender_user_id, by_device + ) stream_id = yield self.store.add_messages_from_remote_to_device_inbox( origin, message_id, local_messages @@ -85,6 +95,55 @@ class DeviceMessageHandler(object): ) @defer.inlineCallbacks + def _check_for_unknown_devices( + self, + message_type: str, + sender_user_id: str, + by_device: Dict[str, Dict[str, Any]], + ): + """Checks inbound device messages for unkown remote devices, and if + found marks the remote cache for the user as stale. + """ + + if message_type != "m.room_key_request": + return + + # Get the sending device IDs + requesting_device_ids = set() + for message_content in by_device.values(): + device_id = message_content.get("requesting_device_id") + requesting_device_ids.add(device_id) + + # Check if we are tracking the devices of the remote user. + room_ids = yield self.store.get_rooms_for_user(sender_user_id) + if not room_ids: + logger.info( + "Received device message from remote device we don't" + " share a room with: %s %s", + sender_user_id, + requesting_device_ids, + ) + return + + # If we are tracking check that we know about the sending + # devices. + cached_devices = yield self.store.get_cached_devices_for_user(sender_user_id) + + unknown_devices = requesting_device_ids - set(cached_devices) + if unknown_devices: + logger.info( + "Received device message from remote device not in our cache: %s %s", + sender_user_id, + unknown_devices, + ) + yield self.store.mark_remote_user_device_cache_as_stale(sender_user_id) + + # Immediately attempt a resync in the background + run_in_background( + self._device_list_updater.user_device_resync, sender_user_id + ) + + @defer.inlineCallbacks def send_device_message(self, sender_user_id, message_type, messages): set_tag("number_of_messages", len(messages)) set_tag("sender", sender_user_id) |