Returns a dictionnary of supported protocols.

def getSupportedProtocols(self):
        """Returns a dictionnary of supported protocols."""
        protocols = {}
        for td in self.TD:
            if td is not None:
                strprotocol = "T=%d" % (td & 0x0F)
                protocols[strprotocol] = True
        if not self.hasTD[0]:
            protocols['T=0'] = True
        return protocols