selftest.socket_wrapper: interface is an integer.

diff --git a/selftest/socket_wrapper.py b/selftest/socket_wrapper.py
index 78e90e0883062c28e264876585ea92f734fd201a..371bad958f2a0d25e0bd5c6e641eea4693521937 100644 (file)
--- a/selftest/socket_wrapper.py
+++ b/selftest/socket_wrapper.py
@@ -58,4 +58,4 @@ def setup_pcap(pcap_file):
     os.environ["SOCKET_WRAPPER_PCAP_FILE"] = pcap_file
 
 def set_default_iface(i):
-    os.environ["SOCKET_WRAPPER_DEFAULT_IFACE"] = i
+    os.environ["SOCKET_WRAPPER_DEFAULT_IFACE"] = str(i)