def _getrport(self):
        if self.rportRequested == True:
            return True
        elif self.rportValue is not None:
            return self.rportValue
        else:
            return None
Returns the rport value expected by the old SIP code.
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/protocols/sip.py/Via._getrport