Simple proxy program development process (2)

Article title: simple proxy program development process (2 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
Abstract: simple Proxy program (source code ). Paste the source code here. I declare that the source code is based on GNU GPL, and the purpose is to hope that you will have time to improve it. You can also change it as you wish. However, if you have made any major changes, please let me know.

After I posted an article "development process of a simple proxy program (1)" and "a simple UDP Proxy program" Last time, many netizens wrote to ask when the following appeared. I have been busy with my work and have forgotten to post the following content. I am very sorry. Now paste the source code here. I declare that the source code is based on GNU GPL, and the purpose is to hope that you will have time to improve it. You can also change it as you wish. However, if you have made any major changes, please let me know.

TODO:

Enables the program to listen to multiple ports and connect to multiple remote services.
This allows the program to read and set listening ports, remote service addresses, and ports from the configuration file to meet the coexistence needs of multiple services.

Attachment: linuxaid.com.cn/articles/7/1/714632039/sp.c> sp. c source code