From 9e08d5b735586e0de7d18e8304f947abc1e8d9e2 Mon Sep 17 00:00:00 2001
From: Dmitry Bukhta <provexlby@gmail.com>
Date: Tue, 20 Feb 2018 01:31:45 +0300
Subject: [PATCH] infinite loop while proxy server refuse connection fix

---
 telethon/extensions/tcp_client.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/telethon/extensions/tcp_client.py b/telethon/extensions/tcp_client.py
index a306302a..de077050 100644
--- a/telethon/extensions/tcp_client.py
+++ b/telethon/extensions/tcp_client.py
@@ -4,6 +4,7 @@ This module holds a rough implementation of the C# TCP client.
 import errno
 import socket
 import time
+from socks import ProxyConnectionError
 from datetime import timedelta
 from io import BytesIO, BufferedWriter
 from threading import Lock
@@ -69,6 +70,8 @@ class TcpClient:
 
                 self._socket.connect(address)
                 break  # Successful connection, stop retrying to connect
+            except ProxyConnectionError:
+                raise
             except OSError as e:
                 # There are some errors that we know how to handle, and
                 # the loop will allow us to retry