'Initialize an interface for use.
Args:
iface_name: \'eth0\'  interface name (\'eth0, eth1,...\')'

def __init__(self, iface_name):

    self._name = iface_name
    self._socket = None
    self._socket_timeout = raw_socket.SOCKET_TIMEOUT
    socket.setdefaulttimeout(self._socket_timeout)
    if (self._name is None):
        raise error.TestError('Invalid    interface    name')
