From 2bdee1320a6a7536dd6139d25206369cd72238f6 Mon Sep 17 00:00:00 2001
From: Caleb Webber <caleb@codingthemsoftly.com>
Date: Fri, 1 Mar 2024 19:27:18 -0500
Subject: [PATCH] add echo server

---
 Cargo.lock       |  7 +++++++
 Cargo.toml       |  3 +++
 src/bin/smoke.rs | 27 +++++++++++++++++++++++++++
 3 files changed, 37 insertions(+)
 create mode 100644 Cargo.lock
 create mode 100644 src/bin/smoke.rs

diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..b09b82e
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "protohackers"
+version = "0.1.0"
diff --git a/Cargo.toml b/Cargo.toml
index 6bbe93a..3f2d7a4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,4 +5,7 @@ edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[[bin]]
+name = "smoke"
+
 [dependencies]
diff --git a/src/bin/smoke.rs b/src/bin/smoke.rs
new file mode 100644
index 0000000..9844813
--- /dev/null
+++ b/src/bin/smoke.rs
@@ -0,0 +1,27 @@
+use std::{io::{Read, Write}, net::TcpListener};
+
+const PORT: usize = 10000;
+const BUFF_SIZE: usize = 1;
+fn main() -> std::io::Result<()> {
+
+    let listener = TcpListener::bind(format!("127.0.0.1:{PORT}"))?;
+
+    for stream in listener.incoming() {
+        match stream {
+            Ok(mut stream) => {
+                loop {
+                    let mut buf: [u8; BUFF_SIZE] = [0; BUFF_SIZE];
+
+                    if let Ok(_) = stream.read_exact(&mut buf) {
+                        stream.write(&buf)?;
+                    } else {
+                        break;
+                    }
+                }
+            },
+            Err(e) => panic!("{:?}", e)
+        }
+    }
+
+    Ok(())
+}