From 651b9452998e210ba208ff9905095d7cc23683a7 Mon Sep 17 00:00:00 2001
From: Avery Pennarun <apenwarr@gmail.com>
Date: Sat, 1 May 2010 20:20:54 -0400
Subject: [PATCH] Prevent loopbacks caused by telnetting to the transproxy port
 directly.

---
 client.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/client.py b/client.py
index ba3bdb7..5b39f0d 100644
--- a/client.py
+++ b/client.py
@@ -135,7 +135,11 @@ def main(remotename, subnets):
     def onaccept():
         sock,srcip = listener.accept()
         dstip = original_dst(sock)
-        print 'Incoming connection from %r to %r.' % (srcip,dstip)
+        log('Incoming connection from %r to %r.\n' % (srcip,dstip))
+        if dstip == sock.getsockname():
+            log("-- ignored: that's my address!\n")
+            sock.close()
+            return
         outsock = socket()
         outsock.setsockopt(SOL_IP, IP_TTL, 42)
         outsock.connect(dstip)