explaingit

irungentoo/toxcore

★ 8,755CAudience · developerComplexity · 5/5Setup · hard

TLDR

Toxcore is the C library powering the Tox protocol, enabling encrypted peer-to-peer messaging, file transfers, and video calls between users with no central servers and no account registration required.

Mindmap

mindmap
  root((repo))
    What it does
      Encrypted messaging
      File transfer
      Video calls
    Architecture
      Peer to peer
      No central server
      DHT discovery
    Connectivity
      UDP hole punching
      TCP relay fallback
      Tox ID system
    Limitations
      Library only no UI
      Compile from source
Click or tap to explore — scroll the page freely

Code map

Detail Auto

An interactive map of this repo's files and how they connect — its source is parsed live in your browser. Click Visualize to build it.

filefunction / class

Things people build with this

USE CASE 1

Build a privacy-focused chat client that lets users communicate without routing messages through any company's servers.

USE CASE 2

Add encrypted peer-to-peer file transfer capability to an existing application using the Tox protocol.

USE CASE 3

Create a secure video calling feature that uses direct UDP connections between users.

USE CASE 4

Develop a serverless messaging system where users exchange Tox IDs instead of usernames or phone numbers.

Tech stack

CUDPTCP

Getting it running

Difficulty · hard Time to first run · 1day+

Must be compiled from source with no pre-built binaries provided, requires a C build toolchain.

License information is not stated in the explanation.

In plain English

Toxcore is a C library that provides the networking and cryptography foundation for the Tox communication protocol. Tox was created as a response to concerns about centralized communication services and government surveillance programs, with the explicit goal of letting people send messages, share files, and make video calls without routing anything through a company's servers. The system is fully peer-to-peer: instead of routing traffic through a central service, it connects users directly to each other. Every user gets a unique identifier called a Tox ID, which is derived from a public key. To find someone on the network, Tox uses a distributed lookup mechanism similar to how BitTorrent locates files, so no single server holds a directory of everyone's addresses. Connections between peers are encrypted end-to-end. Once two users are connected, they can exchange text messages, transfer files, and start video chats, all over an encrypted channel. No account registration is required: you share your Tox ID with someone and they can add you directly. For network connectivity, Tox prefers direct UDP connections because UDP allows a technique called hole punching, which lets two computers behind typical home or office routers find each other without manual configuration. When a firewall prevents that, the library falls back to TCP relay servers as an alternative path. Toxcore is the core library only. It does not include a user interface. Separate client applications built on top of it are available for different platforms, with links listed on the project wiki. Installing it requires compiling from source.

Copy-paste prompts

Prompt 1
I want to build a simple Tox client in C that lets two users exchange messages using Toxcore. Show me how to initialize Toxcore, create a Tox ID, and send a text message to a friend.
Prompt 2
How do I compile Toxcore from source on Ubuntu and link it against a simple C program that connects to the Tox network?
Prompt 3
Show me how Toxcore handles NAT traversal using UDP hole punching so two peers behind home routers can connect directly.
Prompt 4
I want to implement file transfer between two Tox clients using Toxcore. Walk me through the file transfer API.
Open on GitHub → Explain another repo

← irungentoo on gitmyhub — every repo by this author, as a profile.

Verify against the repo before relying on details.