add default arguments

Cargo.toml

@@ -1,11 +1,12 @@
 [package]
-name = "knock"
+name = "knockd"
 version = "0.1.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+clap = { Version = "4.5.1", features = ["derive"] }
 pnet = "0.34.0"
 serde = { version = "1.0.197", features = ["derive"] }
 serde_yaml = "0.9.32"

src/main.rs

@@ -1,3 +1,4 @@
+use clap::Parser;
 use sequence::PortSequenceDetector;
 use server::Server;
 
@@ -6,9 +7,19 @@ mod executor;
 mod sequence;
 mod server;
 
+#[derive(Parser, Debug)]
+#[command(version, about, long_about = "A port knocking server written in Rust")]
+struct Args {
+    /// Path to the configuration file
+    #[arg(short, long, default_value = "config.yaml")]
+    config: String,
+}
+
 fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let args = Args::parse();
+
     // Load the configuration
-    let config = config::load_config("config.yaml")?;
+    let config = config::load_config(&args.config)?;
     // Create the sequence detector
     let detector = PortSequenceDetector::new(config);