def sendPing(self, serial, cbFun, cbCtx):
msgId = next.getId()
self.send(protocol.preparePingData(msgId, serial, self.__secret))
self.__pendingReqs[msgId] = cbFun, cbCtx
def sendReq(self, req, cbFun, cbCtx):
msgId = next.getId()
self.send(protocol.prepareRequestData(msgId, req, self.__secret))
self.__pendingReqs[msgId] = cbFun, cbCtx
return msgId