ping pong works (with a python client)

scripts/client.py

@@ -0,0 +1,21 @@
+import socket
+
+HOST = "127.0.0.1"
+PORT = 9999
+
+payload = b"ping\0"
+
+with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
+    s.connect((HOST, PORT))
+    while True:
+        try:
+            s.sendall(payload)
+            print("> ping")
+        except Exception as e:
+            break
+        reply = s.recv(1024).decode()
+        if reply == "":
+            break
+        print(f"< {reply}")
+    print("connection shut down")
+

src/common/conf.rs

@@ -3,6 +3,8 @@ use clap::ValueEnum;
 use std::{fmt::Display, time::Duration};
 
 const DEFAULT_TIMEOUT_LEN: u64 = 5000; // ms
+const DEFAULT_DELAY_LEN: u64 = 500; // ms
+const DEFAULT_WIN_AFTER: usize = 20;
 
 #[derive(Debug, Clone, Copy)]
 pub enum Mode {
@@ -45,6 +47,8 @@ pub struct Config {
     pub mode: Mode,
     pub threads: usize,
     pub timeout: Duration,
+    pub delay: Duration,
+    pub win_after: usize,
 }
 
 impl Config {
@@ -54,6 +58,8 @@ impl Config {
             mode: cli.mode.clone(),
             threads: cli.threads,
             timeout: Duration::from_millis(DEFAULT_TIMEOUT_LEN),
+            delay: Duration::from_millis(DEFAULT_DELAY_LEN),
+            win_after: DEFAULT_WIN_AFTER,
         }
     }
 }

src/server/mod.rs

@@ -1,14 +1,9 @@
 #![cfg(feature = "server")]
-use std::{error::Error, net::SocketAddr, time::Duration};
+use std::time::Duration;
 
-use anyhow::anyhow;
-use libpt::{
-    bintols::display::humanbytes,
-    log::{debug, error, info, trace, warn},
-};
-use threadpool::ThreadPool;
+use libpt::log::{debug, info, trace, warn};
 use tokio::{
-    io::{AsyncReadExt, BufReader, AsyncBufReadExt},
+    io::{AsyncBufReadExt, AsyncWriteExt, BufReader},
     net::{TcpListener, TcpStream},
     time::timeout,
 };
@@ -20,7 +15,6 @@ use errors::*;
 
 pub struct Server {
     cfg: Config,
-    pool: ThreadPool,
     pub timeout: Option<Duration>,
     server: TcpListener,
 }
@@ -28,11 +22,9 @@ pub struct Server {
 impl Server {
     pub async fn build(cfg: Config) -> anyhow::Result<Self> {
         let server = TcpListener::bind(cfg.addr).await?;
-        let pool = ThreadPool::new(cfg.threads);
         let timeout = Some(Duration::from_secs(5));
         Ok(Server {
             cfg,
-            pool,
             timeout,
             server,
         })
@@ -64,6 +56,7 @@ impl Server {
     }
 
     async fn handle_stream(&self, stream: TcpStream) -> Result<()> {
+        let mut pings: usize = 0;
         let addr = match stream.peer_addr() {
             Ok(a) => a,
             Err(err) => {
@@ -93,13 +86,24 @@ impl Server {
                 trace!("len is apperently 0: {len:?}");
                 break;
             } else {
-                info!(
-                    "< {:?}\t({})\n{}",
-                    addr,
-                    humanbytes(len),
-                    self.decode(&buf)?
-                );
+                let msg = self.decode(&buf)?;
+                info!("< {:?} : {}", addr, msg);
+                if msg.contains("ping") {
+                    pings += 1;
+                }
+                if pings < self.cfg.win_after {
+                    reader.write_all(b"pong\0").await?;
+                    info!("> {:?} : pong", addr,);
+                } else {
+                    reader.write_all(b"you win!\0").await?;
+                    info!("> {:?} : you win!", addr,);
+                    reader.shutdown().await?;
+                    break;
+                }
                 buf.clear();
+
+                // we should wait, so that we don't spam the client
+                std::thread::sleep(self.cfg.delay);
             }
         }
         info!("disconnected peer: {:?}", addr);
@@ -108,7 +112,7 @@ impl Server {
 
     #[inline]
     fn decode(&self, buf: &Vec<u8>) -> Result<String> {
-        Ok(String::from_utf8(buf.clone())?)
+        Ok(String::from_utf8(buf.clone())?.replace('\n', "\\n"))
     }
 
     #[inline]