def GetDBMStrength(self, iwconfig=None):
""" Get the dBm signal strength of the current network.
Returns:
The dBm signal strength.
"""
if not self.iface: return -100
buff = misc.get_irwange_ioctl_result(self.iface, SIOCGIWSTATS)
if not buff:
return None
return str((ord(buff[3]) - 256))
