Data Transfer Protocol for Rust

Cross-platform networking interfaces for Rust.

Data Transfer Protocol

The Data Transfer Protocol (DTP) is a larger project to make ergonomic network programming available in any language. See the full project here.

Installation

Add the package in Cargo.toml:

rustdtp = { version = "*", features = ["rt-tokio"] }

Selecting a runtime

The protocol can be used with both the tokio and async-std runtimes, as well as in purely synchronous environments. Each implementation is gated behind a feature:

• rt-tokio: the tokio implementation, available as rustdtp::rt_tokio
• rt-async-std: the async-std implementation, available as rustdtp::rt_async_std
• rt-sync: the synchronous implementation, available as rustdtp::rt_sync

Multiple features can be activated at the same time, though most times this is not useful.

Creating a server

A server can be built using the Server implementation:

use rustdtp::rt_tokio::*;

#[tokio::main]
async fn main() {
    // Create a server that receives strings and returns the length of each string
    let (mut server, mut server_event) = Server::<usize, String>::start(("0.0.0.0", 0)).await.unwrap();

    // Iterate over events
    while let Some(event) = server_event.next().await {
        match event {
            ServerEvent::Connect { client_id } => {
                println!("Client with ID {} connected", client_id);
            }
            ServerEvent::Disconnect { client_id } => {
                println!("Client with ID {} disconnected", client_id);
            }
            ServerEvent::Receive { client_id, data } => {
                // Send back the length of the string
                server.send(client_id, data.len()).await.unwrap();
            }
            ServerEvent::Stop => {
                // No more events will be sent, and the loop will end
                println!("Server closed");
            }
        }
    }
}

Creating a client

A client can be built using the Client implementation:

use rustdtp::rt_tokio::*;

#[tokio::main]
async fn main() {
    // Create a client that sends a message to the server and receives the length of the message
    let (mut client, mut client_event) = Client::<String, usize>::connect(("127.0.0.1", 29275)).await.unwrap();

    // Send a message to the server
    let msg = "Hello, server!".to_owned();
    client.send(msg.clone()).await.unwrap();

    // Receive the response
    match client_event.next().await.unwrap() {
        ClientEvent::Receive { data } => {
            // Validate the response
            println!("Received response from server: {}", data);
            assert_eq!(data, msg.len());
        }
        event => {
            // Unexpected response
            panic!("expected to receive a response from the server, instead got {:?}", event);
        }
    }
}

Security

Information security comes included. Every message sent over a network interface is encrypted with AES-256. Key exchanges are performed using a 2048-bit RSA key-pair.