From f5fb0bd0339e429529c0d6066bcf345d1b203b7a Mon Sep 17 00:00:00 2001
From: Pierre LALET <pierre.lalet@cea.fr>
Date: Wed, 4 Oct 2017 19:03:08 +0200
Subject: [PATCH] Python 3: fix sndrcv

---
 scapy/sendrecv.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scapy/sendrecv.py b/scapy/sendrecv.py
index 222854b9d..53bcdadc8 100644
--- a/scapy/sendrecv.py
+++ b/scapy/sendrecv.py
@@ -179,7 +179,7 @@ def sndrcv(pks, pkt, timeout=None, inter=0, verbose=None, chainCC=False,
         autostop = 0
 
     while retry >= 0:
-        if timeout < 0:
+        if timeout is not None and timeout < 0:
             timeout = None
         stopevent = threading.Event()