1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
use std::io::{Read, Write};
use std::net::TcpStream;
#[derive(Debug, Clone)]
pub struct RconClient {
host: String,
port: u16,
password: String,
}
#[derive(Debug)]
pub enum RconError {
Connection(String),
Auth(String),
Response(String),
}
impl std::fmt::Display for RconError {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
RconError::Connection(e) => write!(f, "RCON connection error: {e}"),
RconError::Auth(e) => write!(f, "RCON auth error: {e}"),
RconError::Response(e) => write!(f, "RCON response error: {e}"),
}
}
}
const SERVERDATA_AUTH: i32 = 3;
const SERVERDATA_EXECCOMMAND: i32 = 2;
impl RconClient {
pub fn new(password: String) -> Self {
Self {
host: "127.0.0.1".to_string(),
port: 25575,
password,
}
}
/// Non-blocking async wrapper — runs the blocking RCON call on a thread pool.
pub async fn send_command_async(&self, command: String) -> Result<String, RconError> {
let client = self.clone();
tokio::task::spawn_blocking(move || client.send_command(&command))
.await
.map_err(|e| RconError::Connection(e.to_string()))?
}
fn send_command(&self, command: &str) -> Result<String, RconError> {
let mut stream = TcpStream::connect(format!("{}:{}", self.host, self.port))
.map_err(|e| RconError::Connection(e.to_string()))?;
stream
.set_read_timeout(Some(std::time::Duration::from_secs(1)))
.ok();
let request_id = 1;
self.write_packet(&mut stream, request_id, SERVERDATA_AUTH, &self.password)?;
let response = self.read_packet(&mut stream)?;
if response.request_id == -1 {
return Err(RconError::Auth("Invalid RCON password".into()));
}
let cmd_id = 2;
self.write_packet(&mut stream, cmd_id, SERVERDATA_EXECCOMMAND, command)?;
let response = self.read_packet(&mut stream)?;
// Second packet is an end marker — some servers send it, some don't; ignore errors
let _ = self.read_packet(&mut stream);
Ok(response.body)
}
fn write_packet(
&self,
stream: &mut TcpStream,
request_id: i32,
packet_type: i32,
body: &str,
) -> Result<(), RconError> {
let body_bytes = body.as_bytes();
let length = 10 + body_bytes.len() as i32;
let mut packet = Vec::with_capacity(4 + length as usize);
packet.extend_from_slice(&length.to_le_bytes());
packet.extend_from_slice(&request_id.to_le_bytes());
packet.extend_from_slice(&packet_type.to_le_bytes());
packet.extend_from_slice(body_bytes);
packet.extend_from_slice(&[0u8, 0u8]);
stream
.write_all(&packet)
.map_err(|e| RconError::Connection(e.to_string()))?;
Ok(())
}
fn read_packet(&self, stream: &mut TcpStream) -> Result<RconPacket, RconError> {
let mut length_buf = [0u8; 4];
stream
.read_exact(&mut length_buf)
.map_err(|e| RconError::Response(format!("Failed to read length: {e}")))?;
let length = i32::from_le_bytes(length_buf);
if length < 10 {
return Err(RconError::Response("Packet too short".into()));
}
let mut payload = vec![0u8; length as usize];
stream
.read_exact(&mut payload)
.map_err(|e| RconError::Response(format!("Failed to read payload: {e}")))?;
let request_id = i32::from_le_bytes([payload[0], payload[1], payload[2], payload[3]]);
let packet_type = i32::from_le_bytes([payload[4], payload[5], payload[6], payload[7]]);
let body_bytes = &payload[8..payload.len() - 2];
let body = String::from_utf8_lossy(body_bytes).to_string();
Ok(RconPacket {
request_id,
packet_type,
body,
})
}
}
#[derive(Debug)]
struct RconPacket {
request_id: i32,
packet_type: i32,
body: String,
}
|
