Add networking

src/main.rs

···
 
 mod cli;
 mod game;
+mod network;
 mod parser;
 
 fn main() -> ExitCode {

src/network.rs

···
+use std::net::{SocketAddr, TcpListener, TcpStream};
+
+pub enum NetworkError {
+    IO(std::io::Error),
+    NoIncomingConnexionError,
+}
+
+impl From<std::io::Error> for NetworkError {
+    fn from(value: std::io::Error) -> Self {
+        NetworkError::IO(value)
+    }
+}
+
+struct TcpPlayer {
+    connexion_stream: TcpStream,
+}
+
+impl TcpPlayer {
+    pub fn host(addr: SocketAddr) -> Result<TcpPlayer, NetworkError> {
+        let listener = TcpListener::bind(addr)?;
+        let mut streams = listener.incoming();
+        let stream = streams
+            .next()
+            .ok_or(NetworkError::NoIncomingConnexionError)??;
+
+        Ok(TcpPlayer {
+            connexion_stream: stream,
+        })
+    }
+
+    pub fn join(addr: SocketAddr) -> Result<TcpPlayer, NetworkError> {
+        let stream = TcpStream::connect(addr)?;
+
+        Ok(TcpPlayer {
+            connexion_stream: stream,
+        })
+    }
+}

src/parser.rs

···
 
 pub fn parse_file(file_path: &Path) -> Result<[Boat; 4], ParserError> {
     let mut file = File::open(file_path)?;
-    Ok(parse_ships(&mut file)?)
+    parse_ships(&mut file)
 }
 
 pub fn parse_ships<T: Read>(file: &mut T) -> Result<[Boat; 4], ParserError> {