Ref: Passt die Funktion an, sodass sie das aktive Netzwerkinterface zurückgibt.

src/main.rs

@@ -3,7 +3,7 @@ use std::thread::sleep;
 use std::time::Duration;
 use crate::log::LogLevel;
 use crate::log::log;
-use crate::network::network_card::is_network_card_up;
+use crate::network::network_interface::get_active_network_interface;
 
 mod log;
 mod network;
@@ -11,20 +11,27 @@ mod network;
 fn main() {
     log("main", "========== PROGRAMM START ==========", LogLevel::Info);
 
+    let mut network_interface = String::new();
+
     let mut count = 0;
     loop {
-        if count >= 10 {
+        let interface_str = get_active_network_interface().unwrap().trim().to_string();
+
+        if !interface_str.is_empty() {
+            network_interface = interface_str;
+            break;
+        } else if count >= 10 {
             log("main", "Couldn't find active network card, exiting.", LogLevel::Error);
             exit(1);
         }
-        if is_network_card_up() {
+
-            break;
+        log("main", "No active network card found, waiting 1 second.", LogLevel::Warn);
+        count = count+1;
+        sleep(Duration::from_secs(1));
     }
 
-        log("main", "No active network card found, waiting 10 seconds.", LogLevel::Warn);
+    log("main", &format!("Active network interface found: {}", network_interface), LogLevel::Info);
-        count = count+1;
+
-        sleep(Duration::from_secs(10));
-    }
 
     log("main", "========== PROGRAMM END ==========", LogLevel::Info);
 }

src/network/mod.rs

@@ -1 +1,2 @@
 pub mod network_card;
+pub mod network_interface;

src/network/network_interface.rs

@@ -6,9 +6,8 @@ use std::process::Command;
 /// und nicht nur die Loopback-Schnittstelle.
 ///
 /// Rückgabe:
-/// - true: Mindestens eine NIC ist aktiv
+/// - Option<String>: Name der aktiven Netzwerkkarte oder None wenn keine gefunden
-/// - false: Keine aktive NIC gefunden oder Fehler beim Prüfen
+pub fn get_active_network_interface() -> Option<String> {
-pub fn is_network_card_up() -> bool {
     #[cfg(target_os = "linux")]
     {
         use std::fs;
@@ -59,7 +58,7 @@ pub fn is_network_card_up() -> bool {
                     continue;
                 }
 
-                // Optional: bekannte „logische“ Typen via Verzeichnis-Erkennung ausschließen
+                // Optional: bekannte „logische" Typen via Verzeichnis-Erkennung ausschließen
                 // (Bridges, VLANs, Macvlan etc.)
                 if iface_path.join("bridge").exists()
                     || iface_path.join("bonding").exists()
@@ -72,7 +71,7 @@ pub fn is_network_card_up() -> bool {
 
                 // Wenn wir hier sind, haben wir eine aktive physische NIC
                 log::log("network_status", "Found active network interface.", LogLevel::Info);
-                return true;
+                return Some(ifname);
             }
         }
 
@@ -82,7 +81,7 @@ pub fn is_network_card_up() -> bool {
 
         if let Ok(out) = output {
             if !out.status.success() {
-                return false;
+                return None;
             }
             let stdout = String::from_utf8_lossy(&out.stdout);
             for line in stdout.lines() {
@@ -91,13 +90,13 @@ pub fn is_network_card_up() -> bool {
                         let name = ifname.trim();
                         if name != "lo" {
                             log::log("network_status", "Found active network interface.", LogLevel::Info);
-                            return true;
+                            return Some(name.to_string());
                         }
                     }
                 }
             }
         }
-        false
+        None
     }
 
     #[cfg(target_os = "windows")]
@@ -105,8 +104,8 @@ pub fn is_network_card_up() -> bool {
         // Windows: PowerShell verwenden, um aktive Adapter zu finden (Status = Up).
         // Wir ignorieren Loopback/Pseudo-Interfaces, indem wir Physical=true filtern.
         let ps_cmd = r#"
-$adapters = Get-NetAdapter -Physical | Where-Object {$_.Status -eq 'Up'}
+$adapters = Get-NetAdapter -Physical | Where-Object {$_.Status -eq 'Up'} | Select-Object -First 1
-if ($adapters -and $adapters.Count -ge 1) { 'UP' } else { 'DOWN' }
+if ($adapters) { $adapters.Name } else { 'NONE' }
 "#;
         let output = Command::new("powershell")
             .args(["-NoProfile", "-NonInteractive", "-Command", ps_cmd])
@@ -114,23 +113,21 @@ if ($adapters -and $adapters.Count -ge 1) { 'UP' } else { 'DOWN' }
 
         if let Ok(out) = output {
             if !out.status.success() {
-                return false;
+                return None;
             }
-            let stdout = String::from_utf8_lossy(&out.stdout).to_ascii_uppercase();
+            let stdout = String::from_utf8_lossy(&out.stdout).trim().to_string();
 
-            return if stdout.contains("UP") {
+            if stdout != "NONE" {
                 log::log("network_status", "Found active network interface.", LogLevel::Info);
-                true
+                return Some(stdout);
-            } else {
-                false
             }
         }
-        false
+        None
     }
 
     #[cfg(not(any(target_os = "linux", target_os = "windows")))]
     {
         log::log("network_status", "OS not supported.", LogLevel::Error);
-        false
+        None
     }
 }