hibna
88 lines
2.6 KiB
Rust
88 lines
2.6 KiB
Rust
use anyhow::{Result, Context};
|
|
use tokio::io::{AsyncReadExt, AsyncWriteExt};
|
|
use tokio::net::TcpStream;
|
|
use tracing::debug;
|
|
|
|
/// RCON packet types
|
|
const PACKET_LOGIN: i32 = 3;
|
|
const PACKET_COMMAND: i32 = 2;
|
|
const PACKET_RESPONSE: i32 = 0;
|
|
|
|
/// A minimal Source RCON client.
|
|
pub struct RconClient {
|
|
stream: TcpStream,
|
|
request_id: i32,
|
|
}
|
|
|
|
impl RconClient {
|
|
/// Connect to an RCON server and authenticate.
|
|
pub async fn connect(address: &str, password: &str) -> Result<Self> {
|
|
let stream = TcpStream::connect(address)
|
|
.await
|
|
.context("Failed to connect to RCON")?;
|
|
|
|
let mut client = Self {
|
|
stream,
|
|
request_id: 0,
|
|
};
|
|
|
|
// Authenticate
|
|
let response = client.send_packet(PACKET_LOGIN, password).await?;
|
|
if response.id == -1 {
|
|
anyhow::bail!("RCON authentication failed");
|
|
}
|
|
|
|
debug!(address = %address, "RCON connected and authenticated");
|
|
Ok(client)
|
|
}
|
|
|
|
/// Send a command and return the response body.
|
|
pub async fn command(&mut self, cmd: &str) -> Result<String> {
|
|
let response = self.send_packet(PACKET_COMMAND, cmd).await?;
|
|
Ok(response.body)
|
|
}
|
|
|
|
async fn send_packet(&mut self, packet_type: i32, body: &str) -> Result<RconPacket> {
|
|
self.request_id += 1;
|
|
let id = self.request_id;
|
|
|
|
let body_bytes = body.as_bytes();
|
|
let length = 4 + 4 + body_bytes.len() + 2; // id + type + body + 2 null bytes
|
|
|
|
// Write packet
|
|
self.stream.write_i32_le(length as i32).await?;
|
|
self.stream.write_i32_le(id).await?;
|
|
self.stream.write_i32_le(packet_type).await?;
|
|
self.stream.write_all(body_bytes).await?;
|
|
self.stream.write_all(&[0, 0]).await?; // two null terminators
|
|
self.stream.flush().await?;
|
|
|
|
// Read response
|
|
let resp_length = self.stream.read_i32_le().await?;
|
|
let resp_id = self.stream.read_i32_le().await?;
|
|
let resp_type = self.stream.read_i32_le().await?;
|
|
|
|
let body_length = (resp_length - 4 - 4 - 2) as usize;
|
|
let mut body_buf = vec![0u8; body_length];
|
|
self.stream.read_exact(&mut body_buf).await?;
|
|
|
|
// Read two null terminators
|
|
let mut null_buf = [0u8; 2];
|
|
self.stream.read_exact(&mut null_buf).await?;
|
|
|
|
let response_body = String::from_utf8_lossy(&body_buf).to_string();
|
|
|
|
Ok(RconPacket {
|
|
id: resp_id,
|
|
packet_type: resp_type,
|
|
body: response_body,
|
|
})
|
|
}
|
|
}
|
|
|
|
struct RconPacket {
|
|
id: i32,
|
|
packet_type: i32,
|
|
body: String,
|
|
}
|