Native UDP

transport_udp is naia’s native plaintext UDP transport. It is useful for local development, trusted networks, benchmarks, and deployments where you deliberately provide your own security layer. It should not be the default choice for internet-facing games.

naia-server = { version = "0.25", features = ["transport_udp"] }
naia-client = { version = "0.25", features = ["transport_udp"] }

The transport is exposed as naia_server::transport::udp and naia_client::transport::udp.

Server Setup

#![allow(unused)]
fn main() {
use naia_server::transport::udp;

let addrs = udp::ServerAddrs::new(
    "0.0.0.0:14191".parse().unwrap(), // auth TCP
    "0.0.0.0:14192".parse().unwrap(), // UDP data
    "http://127.0.0.1:14192",         // public UDP URL
);
let socket = udp::Socket::new(&addrs, None);
server.listen(socket);
}

The UDP transport uses a TCP auth handshake and then sends game traffic over UDP. Both auth payloads and game packets are plaintext.

Client Setup

#![allow(unused)]
fn main() {
use naia_client::transport::udp;

let socket = udp::Socket::new("http://127.0.0.1:14191", client.socket_config());
client.connect(socket);
}

Link Conditioning

UDP sockets accept an optional LinkConditionerConfig for latency, jitter, and loss simulation:

#![allow(unused)]
fn main() {
use naia_shared::LinkConditionerConfig;

let lag = LinkConditionerConfig::average_condition();
let socket = udp::Socket::new(&addrs, Some(lag));
server.listen(socket);
}

Prefer WebRTC for production unless you are intentionally accepting the plaintext UDP tradeoff.