diff --git a/hbmqtt/utils.py b/hbmqtt/utils.py
index dd92469..161d07c 100644
--- a/hbmqtt/utils.py
+++ b/hbmqtt/utils.py
@@ -13,4 +13,11 @@ def not_in_dict_or_none(dict, key):
     if key not in dict or dict[key] is None:
         return True
     else:
-        return False
\ No newline at end of file
+        return False
+
+
+def format_client_message(session=None, address=None, port=None, id=None):
+    if session:
+        return "(client @=%s:%d id=%s)" % (session.remote_address, session.remote_port, session.client_id)
+    else:
+        return "(client @=%s:%d id=%s)" % (address, port, id)