I need someone experienced in both PHP and C++ to help convert a PHP codebase to C++ while maintaining the same functionality. The current PHP code establishes a TCP connection, handles login sessions, and executes specific functions after a successful login. Your task is to ensure that all functionalities, including TCP connection handling and login session management, are implemented accurately in C++. Please ensure high code quality and accuracy during the conversion. Feel free to use appropriate C++ libraries where necessary to achieve efficiency and maintainability.