From 67dcdb31063aad9de36658e0fc44b92447c2d255 Mon Sep 17 00:00:00 2001
From: iabdalkader <i.abdalkader@gmail.com>
Date: Mon, 26 Sep 2022 16:20:11 +0200
Subject: [PATCH] umqtt: Check if socket is None before trying to close it.

* If connect fails at resolving the address, sock can be None.
---
 arduino_iot_cloud/umqtt.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arduino_iot_cloud/umqtt.py b/arduino_iot_cloud/umqtt.py
index 52d8690..a5d4d65 100644
--- a/arduino_iot_cloud/umqtt.py
+++ b/arduino_iot_cloud/umqtt.py
@@ -150,7 +150,8 @@ def connect(self, retry=10, interval=1.0, clean_session=True):
                 self._connect(clean_session)
                 return True
             except Exception as e:
-                self.sock.close()
+                if self.sock is not None:
+                    self.sock.close()
                 logging.warning(f"Connection failed {e}, retrying after {interval}s")
                 time.sleep(interval)
         return False