git.scottworley.com Git - tattlekey/blob - server/src/main.rs

   1 // tattlekey: A one-key UDP keyboard
   2 // Copyright (C) 2023  Scott Worley <scottworley@scottworley.com>
   3 //
   4 // This program is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // This program is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
  16
  17 use std::net::UdpSocket;
  18
  19 const MESSAGE_SIZE: usize = 12;
  20
  21 fn main() {
  22     let socket = UdpSocket::bind("0.0.0.0:29803").expect("couldn't bind to address");
  23     loop {
  24         let mut buf = [0; MESSAGE_SIZE];
  25         match socket.recv_from(&mut buf) {
  26             Err(e) => eprintln!("Didn't receive data: {e}"),
  27             Ok((number_of_bytes, src_addr)) => {
  28                 let filled_buf = &mut buf[..number_of_bytes];
  29                 if number_of_bytes != MESSAGE_SIZE {
  30                     eprintln!("Ignoring short message ({number_of_bytes}) from {src_addr}");
  31                     continue;
  32                 }
  33                 println!("Got packet from {src_addr}: {filled_buf:?}");
  34             }
  35         }
  36     }
  37 }