feat: add error handling lib

knock-cli/Cargo.toml

@@ -11,6 +11,7 @@ license = "Apache-2.0"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+anyhow = "1.0.80"
 clap = { version = "4.5.1", features = ["derive"] }
 log = "0.4.21"
 pretty_env_logger = "0.5.0"

knock-cli/src/config/mod.rs

@@ -1,11 +1,12 @@
+use anyhow::Result;
 use std::fs::File;
 use std::io::Read;
 
 pub use config::Config;
 pub use config::Rule;
 pub mod config;
 
-pub fn load_config(path: &str) -> Result<Config, Box<dyn std::error::Error>> {
+pub fn load_config(path: &str) -> Result<Config> {
     let mut file = File::open(path)?;
     let mut content = String::new();
 

knock-cli/src/main.rs

@@ -1,3 +1,4 @@
+use anyhow::Result;
 use clap::Parser;
 use log::{error, LevelFilter};
 use pretty_env_logger::env_logger::Builder;
@@ -16,7 +17,7 @@ struct Args {
     rule: Option<String>,
 }
 
-fn main() -> Result<(), Box<dyn std::error::Error>> {
+fn main() -> Result<()> {
     let args = Args::parse();
 
     Builder::new()

knock-cli/src/rule.rs

@@ -1,5 +1,6 @@
 use crate::config::Config;
 use crate::config::Rule;
+use anyhow::Result;
 use log::{error, info};
 use std::collections::HashMap;
 use std::net::{SocketAddr, TcpStream, ToSocketAddrs};
@@ -20,7 +21,7 @@ impl RuleExecutor {
         RuleExecutor { rules }
     }
 
-    pub fn run(&self, name: &str) -> Result<(), Box<dyn std::error::Error>> {
+    pub fn run(&self, name: &str) -> Result<()> {
         if let Some(rule) = self.rules.get(name) {
             info!("Executing rule: {}", rule.name);
             // Iterate over the ports and attempt to connect to each

knockd/Cargo.toml

@@ -11,6 +11,7 @@ license = "Apache-2.0"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+anyhow = "1.0.80"
 clap = { version = "4.5.1", features = ["derive"] }
 log = "0.4.21"
 pnet = "0.34.0"

knockd/src/config/mod.rs

@@ -1,10 +1,11 @@
+use anyhow::Result;
 use std::fs::File;
 use std::io::Read;
 
 pub use config::Config;
 pub mod config;
 
-pub fn load_config(path: &str) -> Result<Config, Box<dyn std::error::Error>> {
+pub fn load_config(path: &str) -> Result<Config> {
     let mut file = File::open(path)?;
     let mut content = String::new();
 

knockd/src/executor.rs

@@ -1,6 +1,7 @@
+use anyhow::Result;
 use std::process::Command;
 
-pub fn execute_command(command: &str) -> Result<(), Box<dyn std::error::Error>> {
+pub fn execute_command(command: &str) -> Result<()> {
     let mut parts = command.split_whitespace();
     let command = parts.next().unwrap();
     let args = parts;

knockd/src/main.rs

@@ -1,3 +1,4 @@
+use anyhow::Result;
 use clap::Parser;
 use log::LevelFilter;
 use pretty_env_logger::env_logger::Builder;
@@ -17,7 +18,7 @@ struct Args {
     config: String,
 }
 
-fn main() -> Result<(), Box<dyn std::error::Error>> {
+fn main() -> Result<()> {
     let args = Args::parse();
 
     // Initialize the logger

knockd/src/server/server.rs

@@ -1,14 +1,13 @@
 extern crate pnet;
 
+use crate::sequence::SequenceDetector;
 use pnet::datalink::Channel::Ethernet;
 use pnet::datalink::{self, NetworkInterface};
 use pnet::packet::ethernet::{EtherTypes, EthernetPacket};
 use pnet::packet::ip::IpNextHeaderProtocols;
 use pnet::packet::tcp::TcpPacket;
 use pnet::packet::Packet;
 
-use crate::sequence::SequenceDetector;
-
 pub struct Server {
     interface_name: String,
     detector: Box<dyn SequenceDetector>,