'Add padding to this protocol message.
Padding is added to this protocol message.  The exact amount is
specified by `paddingLen\'.'

def addPadding(self, paddingLen):

    if ((self.totalLen + paddingLen) > const.MPU):
        raise base.PluggableTransportError("Can't    pad    more    than    the    MTU.")
    if (paddingLen == 0):
        return
    self.totalLen += paddingLen
