C++17 · Asio non-boost · Unreal Engine 4.27+

Networking for C++ and Unreal, without Boost.

Internet Protocol wraps standalone Asio into UDP, TCP, HTTP and WebSocket servers and clients — simple to use, while giving you full control over connections and messages.

Read the docs Star on GitHub

Download releases

Get the plugin on Fab

#include "ip.hpp"using namespace internetprotocol;int main() {    tcp_client_c net;    net.on_message_received = [&](const std::vector<uint8_t> &buffer, size_t bytes) {        std::cout << buffer_to_string(buffer) << std::endl;    };    net.connect();    net.write("Hello, server!", [](const asio::error_code &ec, size_t bytes_sent) {        // message sent    });    join_threads();}

Modules

Every protocol you need, client and server

Each module ships as a header-only C++ class and as a Blueprint-ready Unreal Engine object.

UDP

Connectionless datagrams for low-latency messaging, discovery and real-time state.

SSL

TCP

Reliable, ordered streams with configurable buffers and automatic packet splitting.

SSL

HTTP

Serve and consume REST endpoints with routing, headers, payloads and keep-alive.

SSL

WebSocket

Full-duplex text and binary frames over a single connection, with ping/pong control.

Why Internet Protocol

Simple to start, nothing in your way

Header-only C++17

Drop the headers in your include folder. No Boost, just standalone Asio.

Full control

Manage every connection, buffer and callback yourself — nothing is hidden.

Optional OpenSSL

TLS variants for TCP, HTTP and WebSocket, both server and client side.

Blueprint & JSON

Every module exposed to Blueprints in Unreal, plus a JSON object API.

Get started

Pick your path

C++ header-only library

For any C++17 project. Requires standalone Asio 1.34+ and, optionally, OpenSSL.

UDP, TCP, HTTP & WebSocket
Server and client classes
Callback based, multi-threaded

Unreal Engine plugin

For Unreal Engine 4.27 and above. Use it from Blueprints or C++ through the subsystem.

Blueprint nodes for every module
World subsystem factory
JSON & utility function library

Showcase

See it running

Library showcaseThe C++ library in action across every protocol.

Unreal Engine showcaseBuilding networked gameplay with the Blueprint nodes.

#include "ip.hpp"

using namespace internetprotocol;

int main() {
    tcp_client_c net;

    net.on_message_received = [&](const std::vector<uint8_t> &buffer, size_t bytes) {
        std::cout << buffer_to_string(buffer) << std::endl;
    };
    net.connect();

    net.write("Hello, server!", [](const asio::error_code &ec, size_t bytes_sent) {
        // message sent
    });

    join_threads();
}