pnet

Cargo.toml

@@ -16,6 +16,7 @@ edition = "2018"
 anyhow = "1"
 clap = { version = "4", features = ["string", "env"] }
 openssl = { version = "0.10", features = ["vendored"] }
+pnet = "0.34.0"
 
 [package.metadata]
 publish = "vpn-kill-switch"

src/cli/actions/default.rs

@@ -1,4 +1,5 @@
 use crate::cli::actions::Action;
+use crate::killswitch;
 use anyhow::Result;
 
 /// Handle the create action
@@ -12,7 +13,8 @@ pub fn handle(action: Action) -> Result<()> {
             local,
             print,
         } => {
-            todo!()
+            let info = killswitch::default()?;
+            println!("{}", info);
         }
     }
 

src/killswitch/mod.rs

@@ -0,0 +1,14 @@
+use anyhow::Result;
+
+use pnet::datalink;
+
+pub fn default() -> Result<String> {
+    let all_interfaces = datalink::interfaces();
+    let default_interface = all_interfaces
+        .iter()
+        .find(|e| e.is_up() && !e.is_loopback() && !e.ips.is_empty());
+
+    println!("{:#?}", default_interface);
+
+    Ok("".to_string())
+}

src/lib.rs

@@ -1 +1,2 @@
 pub mod cli;
+pub mod killswitch;