C++98 Cross-Platform TCP and UDP App No AI Allowed Project Number 2

I need a small, well-structured network utility written strictly in ANSI/ISO C++98 that talks over UDP and TCP The program must build and run on both Windows (using classic Winsock) and Linux (BSD sockets) without any third-party dependencies or AI-generated code.

Core behavior
The specification will be sent to you in a chat session when you message me for this project.

What I expect as deliverables
1. Clean, readable C++98 source files
2. A Visual Studio solution or project file for Windows and a GNU Makefile for Linux, both compiling without warnings at ‑Wall
3. A short README detailing build commands, runtime arguments, and anything platform-specific

Acceptance criteria
• Builds out-of-the-box on Windows 10 (MSVC) and Ubuntu (g++)
Code fulfills the requirements of the PDF Project that I will email you.