Add bench server

Cargo.toml

@@ -5,6 +5,7 @@ members = [
     "xtask",
 ]
 exclude = [
+    "extras/bench-server",
     "extras/esp-wifishark",
 ]
 resolver = "2"

extras/bench-server/.gitignore

@@ -0,0 +1 @@
+/target

extras/bench-server/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "bench-server"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+pretty_env_logger = "0.5.0"
+log = "0.4.0"

extras/bench-server/src/main.rs

@@ -0,0 +1,87 @@
+use std::io::{Read, Write};
+use std::net::{TcpListener, TcpStream};
+use std::thread::spawn;
+use std::time::Duration;
+
+use log::info;
+
+fn main() {
+    pretty_env_logger::init();
+    spawn(|| rx_listen());
+    spawn(|| rxtx_listen());
+    tx_listen();
+}
+
+fn tx_listen() {
+    let listener = TcpListener::bind("0.0.0.0:4321").unwrap();
+    loop {
+        let (socket, addr) = listener.accept().unwrap();
+        info!("tx: received connection from: {}", addr);
+        spawn(|| tx_conn(socket));
+    }
+}
+
+fn tx_conn(mut socket: TcpStream) {
+    socket.set_read_timeout(Some(Duration::from_secs(30))).unwrap();
+    socket.set_write_timeout(Some(Duration::from_secs(30))).unwrap();
+
+    let buf = [0; 1024];
+    loop {
+        if let Err(e) = socket.write_all(&buf) {
+            info!("tx: failed to write to socket; err = {:?}", e);
+            return;
+        }
+    }
+}
+
+fn rx_listen() {
+    let listener = TcpListener::bind("0.0.0.0:4322").unwrap();
+    loop {
+        let (socket, addr) = listener.accept().unwrap();
+        info!("rx: received connection from: {}", addr);
+        spawn(|| rx_conn(socket));
+    }
+}
+
+fn rx_conn(mut socket: TcpStream) {
+    socket.set_read_timeout(Some(Duration::from_secs(30))).unwrap();
+    socket.set_write_timeout(Some(Duration::from_secs(30))).unwrap();
+
+    let mut buf = [0; 1024];
+    loop {
+        if let Err(e) = socket.read_exact(&mut buf) {
+            info!("rx: failed to read from socket; err = {:?}", e);
+            return;
+        }
+    }
+}
+
+fn rxtx_listen() {
+    let listener = TcpListener::bind("0.0.0.0:4323").unwrap();
+    loop {
+        let (socket, addr) = listener.accept().unwrap();
+        info!("rxtx: received connection from: {}", addr);
+        spawn(|| rxtx_conn(socket));
+    }
+}
+
+fn rxtx_conn(mut socket: TcpStream) {
+    socket.set_read_timeout(Some(Duration::from_secs(30))).unwrap();
+    socket.set_write_timeout(Some(Duration::from_secs(30))).unwrap();
+
+    let mut buf = [0; 1024];
+    loop {
+        match socket.read(&mut buf) {
+            Ok(n) => {
+                if let Err(e) = socket.write_all(&buf[..n]) {
+                    info!("rxtx: failed to write to socket; err = {:?}", e);
+                    return;
+                }
+            }
+            Err(e) => {
+                info!("rxtx: failed to read from socket; err = {:?}", e);
+                return;
+            }
+        }
+    }
+}