Cpp-IOCP-Server

High-performance Windows C++ Chat Server using I/O Completion Ports (IOCP), fully compatible with Visual Studio 2026 and SQL Server.

This project includes:

• ✔️ Console-based Chat Server
• ✔️ Console Client
• ✔️ Automated Bot Client (BClient)
• ✔️ SQL Server integration
• ✔️ Jenkins CI build pipeline
• ✔️ Tested and runnable on Visual Studio 2026 + Windows 11/10

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Overview

Cpp-IOCP-Server is a multithreaded TCP chat server implemented using Windows I/O Completion Ports (IOCP) for scalable asynchronous networking.

It is designed to handle many concurrent clients efficiently with minimal CPU overhead.

Key Components

Component Description

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Server Console-based asynchronous IOCP TCP server Client Simple console client for manual chat testing BClient Bot client for load testing & automation SQL Server Integration Stores users & chat logs Jenkinsfile Windows-based MSBuild pipeline

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Features

High Performance Networking (IOCP)

• Asynchronous TCP sockets\
• Efficient completion port threading model\
• Highly scalable for many concurrent users

SQL Server Support

Connection settings stored in:

Server/conf/SqlConnection.properties

Database schema:

Chat/chatTable.sql

Automated Bot Client

Useful for: - Load testing - Repetitive workflow tests - Simulating large user groups

CI/CD with Jenkins

• Windows-based build pipeline using Jenkinsfile
• Compatible with MSBuild 2026 toolset

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Repository Structure

/Server                     — Visual Studio 2026 chat server project
/Client                     — Console client
/BClient                    — Bot client
/Chat                       — Shared protocol definitions
/Chat/chatTable.sql         — SQL Server schema
README.md                   — Documentation
Jenkinsfile                 — Jenkins CI pipeline

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Requirements

Software

• Windows 10 / Windows 11
• Visual Studio 2026
  • MSVC v146 Toolset\
  • Windows SDK 10.0+
• SQL Server 2017+
• Git (optional, for Jenkins builds)

Development Environment

Ensure the following VS2026 workloads are installed:

• ✔ Desktop development with C++\
• ✔ Windows 10/11 SDK\
• ✔ MSVC v146 compiler

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Build & Run Instructions

1️. Prepare SQL Server

1. Create a database.
2. Run:

<!-- -->

Chat/chatTable.sql

3. Configure DB connection:

<!-- -->

Server/conf/SqlConnection.properties

Example:

DB_HOST=127.0.0.1
DB_USER=sa
DB_PASSWORD=your_password
DB_NAME=chatdb

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2️. Build the Server / Client / Bot

Open each .sln in Visual Studio 2026:

• Server/Server.sln
• Client/Client.sln
• BClient/BClient.sln

Build:

Configuration: Release
Platform: x64

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3️. Run the Server

Server.exe

You should see:

Server ready listen
port number : xxxx
Server CPU num : xx

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4️. Run Clients

Start one or more:

Client.exe
BClient.exe

They will connect to the server and begin communication.

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Bot Client Usage

The Bot Client (BClient) is capable of:

• Auto-login\
• Auto-message sending\
• Load testing with many parallel bots

This allows verifying server stability under heavy traffic.

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##Jenkins CI Integration

Included Jenkinsfile supports automated builds on Windows:

• Git checkout\
• MSBuild compile\
• Artifact generation

Configure Jenkins agent with:

• Visual Studio 2026 Build Tools\
• Git\
• Windows Server 2019/2022 or Windows 11

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Why IOCP?

IOCP allows:

• High concurrency with fewer threads\
• Low CPU usage\
• Efficient overlapped I/O\
• Ideal for chat servers, game servers, and streaming servers