Rust Data Transfer Protocol

Asynchronous cross-platform networking interfaces for Rust.

The two fundamental network objects this crate provides are the server and client. When starting a server or connecting via a client, the task will not block while it performs network operations in the background. Upon instantiation, both the server and client return handles that provide a mechanism for communicating with the background task, and instructing it to provide status information or halt network operations.

Creating a server

A server can be built using the Server implementation:

```rust use rustdtp::{Server, ServerEvent};

[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::::start(("0.0.0.0", 0)).await.unwrap();

// Wait for events forever
loop {
    match server_event.recv().await.unwrap() {
        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 => {
            println!("Server closed");
            break;
        },
    }
}

} ```

Creating a client

A client can be built using the Client implementation:

```rust use rustdtp::{Client, ClientEvent};

[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::::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.recv().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.