Improve interface availability check in wait_for_interface_up function

listener.py

@@ -258,16 +258,28 @@ def channel_hopper(interface, hop_interval):
 def is_deadpoint(ap_bssid):
     return sum(ap_clients[ap_bssid].values()) < 2  # No meaningful client interaction
 
-def wait_for_interface_up(iface, timeout=5):
-    print(f"[~] Waiting for interface {iface} to become available...")
-    for _ in range(timeout * 10):  # check every 0.1s for `timeout` seconds
-        if iface in psutil.net_if_stats():
-            print(f"[+] Interface {iface} is up!")
-            return True
-        time.sleep(0.1)
-    print(f"[!] Interface {iface} did not become available in {timeout} seconds.")
+def wait_for_interface_up(interface, timeout=5):
+    import shutil
+    import time
+
+    for _ in range(timeout * 5):
+        result = shutil.which("iw")  # Just checking iw exists first
+        if not result:
+            print("[!] 'iw' not found.")
+            return False
+
+        try:
+            info = subprocess.check_output(["iw", "dev"]).decode()
+            if f"Interface {interface}" in info:
+                if "type monitor" in info:
+                    return True
+        except subprocess.CalledProcessError:
+            pass
+        time.sleep(0.2)
+    print(f"[!] Timeout waiting for interface {interface} to be up and in monitor mode.")
     return False
 
+
 # === Main ===
 def main():
     parser = ArgumentParser()
@@ -284,8 +296,10 @@ def main():
 
     reset_interface(args.monitor_iface)
     if not wait_for_interface_up(args.monitor_iface):
+        print("[!] Interface failed to become available. Exiting.")
         sys.exit(1)
 
+
     print(f"[+] Starting passive observer.")
     print(f"    Main interface: {args.main_iface}")
     print(f"    Monitor interface: {args.monitor_iface}")
@@ -340,6 +354,7 @@ def main():
 
     reset_interface(args.monitor_iface)
     if not wait_for_interface_up(args.monitor_iface):
+        print("[!] Interface failed to become available. Exiting.")
         sys.exit(1)
 
 def get_mac_vendor(mac):