Add network prototype

This prototype is untested, since there is currently no client to test it with.

Related to #2

src/link/mod.rs

@@ -1,4 +1,60 @@
+use std::error::Error;
+use std::io::{Read, Write};
+use std::net::{SocketAddr, TcpListener};
+use std::sync::Arc;
+use std::{str, thread};
+
 mod reader;
 mod writer;
 pub use reader::MessageReader;
 pub use writer::MessageWriter;
+
+pub struct Link {
+    reader: MessageReader,
+    writer: MessageWriter,
+}
+
+impl Link {
+    pub fn run<F>(port: u16, handler: F) -> Result<(), Box<dyn Error>>
+    where
+        F: Fn(&mut Link, &str) -> () + Send + Sync + 'static,
+    {
+        let address = SocketAddr::from(([0, 0, 0, 0], port));
+        let listener = TcpListener::bind(address)?;
+        let handler = Arc::new(handler);
+        loop {
+            //  Listen to new (multiple) connection
+            let mut reading_stream = listener.accept()?.0;
+            let mut writing_stream = reading_stream.try_clone()?;
+            let mut avarice_link = Link {
+                reader: MessageReader::new(),
+                writer: MessageWriter::new(),
+            };
+            let handler_clone = handler.clone();
+            //  On connection - spawn a new thread
+            thread::spawn(move || loop {
+                let mut buffer = [0; 1024];
+                //  Reading cycle
+                match reading_stream.read(&mut buffer) {
+                    Ok(n) => avarice_link.reader.push(&buffer[..n]).unwrap(),
+                    _ => panic!("Connection issue!"),
+                };
+                //  Handling cycle
+                while let Some(message) = avarice_link.reader.pop() {
+                    handler_clone(&mut avarice_link, &message);
+                }
+                //  Writing
+                avarice_link
+                    .writer
+                    .update_ue_received_bytes(avarice_link.reader.ue_received_bytes());
+                if let Some(bytes) = avarice_link.writer.try_pop() {
+                    writing_stream.write_all(&bytes).unwrap();
+                }
+            });
+        }
+    }
+
+    pub fn write(&mut self, message: &str) {
+        self.writer.push(message);
+    }
+}

src/main.rs

@@ -1,13 +1,9 @@
-use std::env;
-use std::path::Path;
 mod link;
-mod unreal_config;
+use link::Link;
 
 fn main() {
-    let args: Vec<String> = env::args().collect();
-    let filename = &args[1];
-    let config = unreal_config::load_file(Path::new(filename));
-    if let Ok(config) = config {
-        print!("{}", config);
-    }
+    match Link::run(1234, |link, message| { link.write(message);}) {
+        Ok(_) => print!("Connect!"),
+        _ => print!("Connection error!"),
+    };
 }