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Qt，TCP / IP通信校验和

[英]Qt, tcp/ip communication checksum

原文 2015-02-27 03:35:39 7 1 c++/ qt/ sockets/ tcp

I am writing a data display program where I receive the data through a serial port. 我正在编写一个数据显示程序，该程序通过串行端口接收数据。 The listener is written by others and it is quite complex. 侦听器是由其他人编写的，非常复杂。 Now I need to transfer the received data to another program/pc. 现在，我需要将接收到的数据传输到另一个程序/ pc。 So I am thinking of the standard tcp communication from Qt. 因此，我正在考虑来自Qt的标准TCP通信。 Is there any class that come along with the tcp classes that does job like checksum? 与tcp类一起工作的类是否有像校验和一样的工作？ If I am transmitting an array of 10 doubles each time but at high frequency. 如果我要传输的数组每次都是10倍，但频率很高。 How could I write a client that received all the data correctly without writing those complex algorithms to check the validity of received data bytes? 如何编写一个可以正确接收所有数据的客户端，而无需编写那些复杂的算法来检查接收到的数据字节的有效性？

1 个解决方案

TCP/IP includes these checks as part of the protocol itself. TCP / IP包括这些检查作为协议本身的一部分。 This includes guarantees for data integrity, as well as the correct re-assembly of data (ie it will definitely be in the same order). 这包括对数据完整性的保证，以及对数据的正确重组（即，肯定会以相同的顺序）。 You mentioned that TCP chops the datastream into packets; 您提到TCP将数据流切成数据包。 this is true, but it will re-assemble the packets in the correct order on the receiving end, or request a re-transmission if it needs to do so. 确实如此，但是它将在接收端以正确的顺序重新组合数据包，或者在需要时请求重新传输。 All of this is taken care of by the Qt networking classes. 所有这些都由Qt网络课程解决。