You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: mod.rs
    path of file: ./repos/fuso/src/core/protocol/local
    
    the code of the file until where you have to start completion: use std::{
    io::Read,
    net::{Ipv4Addr, Ipv6Addr, SocketAddr},
};

use bytes::{Buf, BufMut};

use crate::{Addr, Error, Kind, Result, Socket};

// macro_rules! invalid {
//     () => {
//         Err(Kind::Deserialize("invalid data".to_owned()).into())
//     };
// }

// pub const MAGIC: u32 = 0xFC;

// #[derive(Debug, Clone, PartialEq, Eq)]
// pub struct Packet {
//     pub magic: u32,
//     pub data_len: u32,
//     pub payload: Vec<u8>,
// }

// #[derive(Debug, Clone, PartialEq, E
    
//     fn from(behavior: &Message) -> Self {
//         let mut buf = Vec::new();

//         buf.put_u8(Message::get_magic());

//         match behavior {
//             Message::Bind(bind) => {
//                 buf.put_u8(0x01);
//                 buf.put_slice(&Vec::from(bind));
//             }
//             Message::Connect(conn, auth) => {
//                 buf.put_u8(0x02);
//                 buf.put_slice(&Vec::from(conn));
//                 buf.put_slice(&Vec::from(auth));
//             }
//         }

//         buf
//     }