Set TCP_KEEPALIVE socket option to fix tcp_connection problem in

some network. Issue-100

lib/util/zmqutil.js

@@ -0,0 +1,14 @@
+// ISSUE-100 (https://github.com/openstf/stf/issues/100)
+
+// In some networks TCP Connection dies if kept idle for long.
+// Setting TCP_KEEPALIVE option true, to all the zmq sockets
+// won't let it die
+
+var zmq = require('zmq')
+
+module.exports.socket = function() {
+  var sock = zmq.socket.apply(zmq, arguments)
+  sock.setsockopt(zmq.ZMQ_TCP_KEEPALIVE, 1)
+  sock.setsockopt(zmq.ZMQ_TCP_KEEPALIVE_IDLE, 300000)
+  return sock
+}