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a/relay/src/main.rs b/relay/src/main.rs new file mode 100644 index 0000000..bfe58a2 --- /dev/null +++ b/relay/src/main.rs @@ -0,0 +1,80 @@ +use chrono::{Local, Offset}; +use std::io::{Read, Write}; +use std::net::{TcpListener, TcpStream}; +use std::thread; + +#[repr(u8)] +#[allow(non_camel_case_types)] +enum ServerMetods { + GET_TIMEZONE = 1, +} + +fn handle_client(mut stream: TcpStream) { + let peer_addr = stream + .peer_addr() + .unwrap_or_else(|_| "unknown".parse().unwrap()); + println!("New client connected: {}", peer_addr); + + let mut buffer = [0; 1024]; + + loop { + match stream.read(&mut buffer) { + Ok(0) => { + // Connection was closed by client + println!("Client {} disconnected", peer_addr); + break; + } + Ok(bytes_read) => { + // Process the received data here + let received_data: &[u8] = &buffer[..bytes_read]; + + match received_data[0] { + x if x == ServerMetods::GET_TIMEZONE as u8 => { + let mut offset_seconds: i32 = Local::now() // Use current time + .offset() + .fix() + .local_minus_utc(); + + offset_seconds = offset_seconds.to_be(); + + let _ = stream.write_all(&offset_seconds.to_be_bytes()); + let _ = stream.flush(); + } + _ => { + println!( + "Warning!: client called Unknown method: 0x{:02x}", + buffer[0] + ); + } + } + let _ = stream.shutdown(std::net::Shutdown::Both); + } + Err(e) => { + eprintln!("Error reading from {}: {}", peer_addr, e); + break; + } + } + } +} + +fn main() -> std::io::Result<()> { + let listener = TcpListener::bind("0.0.0.0:7413")?; + println!("TCP Server listening on 0.0.0.0:7413"); + println!("Waiting for connections..."); + + for stream in listener.incoming() { + match stream { + Ok(stream) => { + // Handle each client in a separate thread + thread::spawn(move || { + handle_client(stream); + }); + } + Err(e) => { + eprintln!("Connection failed: {}", e); + } + } + } + + Ok(()) +}