2 files changed, 17 insertions, 0 deletions
diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py
index 627acc6a4f..78719eed25 100644
--- a/synapse/federation/federation_client.py
+++ b/synapse/federation/federation_client.py
@@ -138,6 +138,12 @@ class FederationClient(FederationBase):
         return defer.succeed(None)
 
     @log_function
+    def send_device_messages(self, destination):
+        """Sends the device messages in the local database to the remote
+        destination"""
+        self._transaction_queue.enqueue_device_messages(destination)
+
+    @log_function
     def send_failure(self, failure, destination):
         self._transaction_queue.enqueue_failure(failure, destination)
         return defer.succeed(None)
diff --git a/synapse/federation/transaction_queue.py b/synapse/federation/transaction_queue.py
index c0ee946ac0..633c79c352 100644
--- a/synapse/federation/transaction_queue.py
+++ b/synapse/federation/transaction_queue.py
@@ -157,6 +157,17 @@ class TransactionQueue(object):
             self._attempt_new_transaction, destination
         )
 
+    def enqueue_device_messages(self, destination):
+        if destination == self.server_name or destination == "localhost":
+            return
+
+        if not self.can_send_to(destination):
+            return
+
+        preserve_context_over_fn(
+            self._attempt_new_transaction, destination
+        )
+
     @defer.inlineCallbacks
     def _attempt_new_transaction(self, destination):
         yield run_on_reactor()