refactor: add Clone trait to Host struct (#20)

* add Clone to Host struct

* make specific interfaces also Clone

* update dependencies

* update server example

---------

Co-authored-by: Maciej Wójcik <wojcik91@gmail.com>

examples/server.rs

@@ -6,51 +6,73 @@ use defguard_wireguard_rs::{
 use x25519_dalek::{EphemeralSecret, PublicKey};
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    // Create new api object for interface
+    // Create new api object for interface management
     let ifname: String = if cfg!(target_os = "linux") || cfg!(target_os = "freebsd") {
         "wg0".into()
     } else {
         "utun3".into()
     };
     let wgapi = WGApi::new(ifname.clone(), false)?;
 
-    // create interface
+    // create host interface
     wgapi.create_interface()?;
 
-    // read current interface data
+    // read current interface status
     let host = wgapi.read_interface_data()?;
-    println!("WireGuard interface: {host:#?}");
+    println!("WireGuard interface before configuration: {host:#?}");
 
-    // prepare peer configuration
+    // store peer keys to remove peers later
+    let mut peer_keys = Vec::new();
+
+    // prepare initial WireGuard interface configuration with one client
     let secret = EphemeralSecret::random();
     let key = PublicKey::from(&secret);
     let peer_key: Key = key.as_ref().try_into().unwrap();
-    let mut peer = Peer::new(peer_key.clone());
-    let addr = IpAddrMask::from_str("10.20.30.40/24").unwrap();
+    peer_keys.push(peer_key.clone());
+    let mut peer = Peer::new(peer_key);
+    let addr = IpAddrMask::from_str("10.20.30.2/32").unwrap();
     peer.allowed_ips.push(addr);
 
-    // Configure host interface
     let interface_config = InterfaceConfiguration {
         name: ifname.clone(),
         prvkey: "AAECAwQFBgcICQoLDA0OD/Dh0sO0pZaHeGlaSzwtHg8=".to_string(),
         address: "10.6.0.30".to_string(),
         port: 12345,
         peers: vec![peer],
     };
+
+    // apply initial interface configuration
     wgapi.configure_interface(&interface_config)?;
 
-    // Create peers
-    for _ in 0..32 {
+    // read current interface status
+    let host = wgapi.read_interface_data()?;
+    println!("WireGuard interface initial config: {host:#?}");
+
+    // add more WireGuard clients
+    for peer_id in 3..13 {
         let secret = EphemeralSecret::random();
         let key = PublicKey::from(&secret);
-        let peer = Peer::new(key.as_ref().try_into().unwrap());
+        let peer_key: Key = key.as_ref().try_into().unwrap();
+        peer_keys.push(peer_key.clone());
+        let mut peer = Peer::new(peer_key);
+        let addr = IpAddrMask::from_str(&format!("10.20.30.{peer_id}/32")).unwrap();
+        peer.allowed_ips.push(addr);
+        // add peer to WireGuard interface
         wgapi.configure_peer(&peer)?;
-        wgapi.remove_peer(&peer.public_key)?;
     }
 
-    // read current interface data
+    // read current interface status
+    let host = wgapi.read_interface_data()?;
+    println!("WireGuard interface with peers: {host:#?}");
+
+    // remove all peers
+    for peer_key in peer_keys {
+        wgapi.remove_peer(&peer_key)?;
+    }
+
+    // read current interface status
     let host = wgapi.read_interface_data()?;
-    println!("WireGuard interface: {host:#?}");
+    println!("WireGuard interface without peers: {host:#?}");
 
     // remove interface
     wgapi.remove_interface()?;

src/host.rs

@@ -158,7 +158,7 @@ impl Peer {
 }
 
 /// WireGuard host representation.
-#[derive(Debug, Default)]
+#[derive(Debug, Default, Clone)]
 pub struct Host {
     pub listen_port: u16,
     pub private_key: Option<Key>,

src/wgapi_freebsd.rs

@@ -7,6 +7,7 @@ use std::{process::Command, str::FromStr};
 /// Manages interfaces created with FreeBSD kernel WireGuard module.
 ///
 /// Requires FreeBSD version 14+.
+#[derive(Clone)]
 pub struct WireguardApiFreebsd {
     ifname: String,
 }

src/wgapi_linux.rs

@@ -8,6 +8,7 @@ use std::str::FromStr;
 ///
 /// Communicates with kernel module using `Netlink` IPC protocol.
 /// Requires Linux kernel version 5.6+.
+#[derive(Clone)]
 pub struct WireguardApiLinux {
     ifname: String,
 }

src/wgapi_userspace.rs

@@ -18,6 +18,7 @@ const USERSPACE_EXECUTABLE: &str = "wireguard-go";
 ///
 /// We assume that `wireguard-go` executable is managed externally and available in `PATH`.
 /// Currently works on Unix platforms.
+#[derive(Clone)]
 pub struct WireguardApiUserspace {
     ifname: String,
 }