65 lines
1.7 KiB
Rust
65 lines
1.7 KiB
Rust
use std::io::Write;
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use std::net;
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fn listen(socket: &net::UdpSocket) {
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let mut buf: [u8; 20] = [0; 20];
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let number_of_bytes: usize = 0;
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let mut result: Vec<u8> = Vec::new();
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match socket.recv_from(&mut buf) {
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Ok((number_of_bytes, _)) => {
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result = Vec::from(&buf[0..number_of_bytes]);
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}
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Err(fail) => println!("failed listening {:?}", fail),
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}
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let display_result = result.clone();
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let result_str = String::from_utf8(display_result).unwrap();
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println!("received message: {:?}", result_str);
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if result_str.contains("S0R1") {
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write_file("Race active", "racestate.txt");
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write_file("00", "rx1.txt");
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write_file("00", "rx2.txt");
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write_file("00", "rx3.txt");
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}
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if result_str.contains("S0R0") {
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write_file("Race inactive", "racestate.txt");
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}
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if result_str.contains("S0L") {
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// zb sS1L0000000DAF
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write_file(&result_str[3..5], "rx1.txt");
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}
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if result_str.contains("S1L") {
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write_file(&result_str[3..5], "rx2.txt");
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}
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if result_str.contains("S2L") {
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write_file(&result_str[3..5], "rx3.txt");
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}
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}
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fn write_file(text: &str, filename: &str) {
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let mut file = std::fs::File::create(filename).expect("create failed");
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file.write_all(text.as_bytes()).expect("write failed");
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//println!("data written to file");
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}
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fn main() {
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write_file("Race inactive", "racestate.txt");
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write_file("00", "rx1.txt");
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write_file("00", "rx2.txt");
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write_file("00", "rx3.txt");
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let socket = net::UdpSocket::bind("0.0.0.0:0").expect("failed to bind host socket"); // local bind port
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let msg = String::from("ok").into_bytes();
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socket
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.send_to(&msg, "192.168.0.141:9000")
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.expect("cannot send");
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loop {
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listen(&socket); // this call is blockig
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}
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}
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