From cd51a49eaf8fe7f83f6bc99d2ba6acb51267e5b2 Mon Sep 17 00:00:00 2001
From: Claudio-Daniel Freire <claudio-daniel.freire@inria.fr>
Date: Mon, 18 Apr 2011 18:16:11 +0200
Subject: [PATCH] Fix tun_connect not to use 100% CPU (by only waiting for
 write-ready sockets that really need to write)

---
 scripts/tun_connect.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/scripts/tun_connect.py b/scripts/tun_connect.py
index ba74a6ad..c416557e 100644
--- a/scripts/tun_connect.py
+++ b/scripts/tun_connect.py
@@ -310,7 +310,12 @@ def tun_fwd(tun, remote):
     fwbuf = ""
     bkbuf = ""
     while not abortme:
-        rdrdy, wrdy, errs = select.select((tun,remote),(tun,remote),(tun,remote),1)
+        wset = []
+        if packetReady(bkbuf):
+            wset.append(tun)
+        if packetReady(fwbuf):
+            wset.append(remote)
+        rdrdy, wrdy, errs = select.select((tun,remote),wset,(tun,remote),1)
         
         # check for errors
         if errs:
-- 
2.47.0