Today we’re releasing a new update of the SFS3 C++ API (3.1.1) that comes with an UE5 Plugin for ease of integration with Unreal. Additionally we’ve released a new Example pack for C++ with tutorials for both vanilla C++ (no-engine) and UE5.

As usual you can find all the downloadable material here:

• SFS3 API downloads
• SFS3 Examples section

Additionally you can check the Plugin setup and the UE Connector tutorial in our documentation website.

We’ve just released the SmartFoxServer 3 C++ client API.

The new C++ SDK is portable, lightweight and designed to support multiple game development needs: from low-level, no-engine projects (SDL, Raylib, etc.) to games based on popular platforms such as UE5, Godot 4.x, O3DE and more.

Minimum requirements are:

• C++17 compiler (Clang, GCC, MSVC)
• CMake 3.16 or higher

Download and documentation:

• Download the SFS3 C++ client API from here
• Download the C++ example pack
• Read the API setup docs here
• Consult the C++ API docs here

We have just released a critical security update for an issues that was recently discovered. The vulnerability is caused by a malformed compressed packet that can pin one or more threads at 100%, causing the server disruption.

We highly recommend to patch your SmartFoxServer instance(s) as soon as possible and, to this end, we have released backward compatible patches for older releases up to SFS2X 2.12.x, as well as SmartFoxServer 3.0.

This release focuses on stability, security and better diagnostics:

Security fix: reconnection handshake for encrypted sessions is now hardened: session tokens are regenerated and sent encrypted after a successful reconnect.

Better error reporting: UDP disconnections during RDP failures now return more detailed info, making it easier to debug connectivity issues.

Performance fix: resolved an issue causing extra latency with fragmented RDP packets.

Faster kick handling: kicked users are now disconnected more promptly.

Consistency fixes: cleaned up String vs ShortString usage across system requests.

⚠ Note: client API v3.1.0 is now the minimum required version, so make sure to update your clients!

Download link and full release notes: https://www.smartfoxserver.com/download/sfs3

We’ve rolled out major improvements to the Audio API and several important fixes. Here’s what’s new:

Audio Enhancements
Better audio quality with our upgraded echo cancellation, noise suppression, and automatic gain control—now powered by WebRTC’s proven audio processing. We’ve added smart audio interpolation to smooth out network hiccups and automatic resampling to handle microphone/speaker mismatches. Plus, we’ve cut garbage collection pressure for smoother performance.

New Features

• SFSArray now supports IEnumerable
• Custom configuration file support via ConfigData.Parse
• Audio Echo Cancellation for Unity

Under the Hood
Fixed a few validation issues, test-only unsafe SSL configuration and debug logging noise.

Get the new API at this url:
https://www.smartfoxserver.com/download/sfs3#p=client