P2P内网透传的TCP协议代码实现，T_Trans需运行在有公网的IP设备上。T_ServerA为内网1(如办公室局域网且可以上网)，T_ClientB为内网2(如出差宾馆局域网且可以上网)。T_ServerA、T_ClientB内网均没有在对应路由设置直接映射关系，不可以直接互通数据。T_Trans负责将T_ServerA、T_ClientB互联，类似代理。(P2P internal network transmissions TCP protocol code implementation, T_Trans need to run on the public network of IP devices. T_ServerA is an intranet 1 (such as an office LAN and can be online), and T_ClientB is an intranet 2 (such as a business trip to a hotel LAN and can surf the Internet). T_ServerA and T_ClientB intranet have no direct mapping relations in the corresponding routing settings, and can not communicate directly with the data. T_Trans is responsible for interconnecting T_ServerA, T_ClientB, as a proxy.)