dumped that AI-Shitt and rebuild from scratch . works now

src/utils.py

@@ -1,40 +1,33 @@
-def get_available_interfaces():
-    import netifaces
-    return netifaces.interfaces()
-
-def format_ip_address(ip):
-    try:
-        parts = ip.split('.')
-        if len(parts) != 4:
-            raise ValueError("Invalid IP address format")
-        return '.'.join(str(int(part)) for part in parts)
-    except ValueError as e:
-        raise ValueError(f"Error formatting IP address: {e}")
-
-def validate_subnet_mask(mask):
-    valid_masks = [
-        '255.255.255.255', '255.255.255.254', '255.255.255.252',
-        '255.255.255.248', '255.255.255.240', '255.255.255.224',
-        '255.255.255.192', '255.255.255.128', '255.255.255.0',
-        '255.255.254.0', '255.255.252.0', '255.255.248.0',
-        '255.255.240.0', '255.255.224.0', '255.255.192.0',
-        '255.255.128.0', '255.255.0.0', '255.254.0.0',
-        '255.252.0.0', '255.248.0.0', '255.240.0.0',
-        '255.224.0.0', '255.192.0.0', '255.128.0.0',
-        '255.0.0.0', '254.0.0.0', '252.0.0.0',
-        '248.0.0.0', '240.0.0.0', '224.0.0.0',
-        '192.0.0.0', '128.0.0.0', '0.0.0.0'
-    ]
-    if mask not in valid_masks:
-        raise ValueError("Invalid subnet mask")
-
 import socket
+import ipaddress
 import psutil
+from typing import Optional, Tuple
 
 def get_network_interfaces():
+    """Return only interfaces that have an IPv4 address to keep choices sane."""
     interfaces = []
     for iface, addrs in psutil.net_if_addrs().items():
         for addr in addrs:
             if addr.family == socket.AF_INET:
                 interfaces.append(iface)
-    return interfaces
+                break
+    return sorted(interfaces)
+
+def get_iface_ipv4_config(iface: str) -> Tuple[Optional[str], Optional[str]]:
+    """Return (ipv4_addr, netmask) for interface, or (None, None) if not present."""
+    addrs = psutil.net_if_addrs().get(iface, [])
+    for a in addrs:
+        if a.family == socket.AF_INET:
+            return a.address, a.netmask
+    return None, None
+
+def format_ip_address(ip: str) -> str:
+    """Normalize dotted quad; raises on invalid input."""
+    ip_obj = ipaddress.ip_address(ip)
+    if ip_obj.version != 4:
+        raise ValueError("Only IPv4 is supported.")
+    return str(ip_obj)
+
+def validate_subnet_mask(mask: str) -> None:
+    """Accept masks like 255.255.255.0; raise ValueError if invalid."""
+    ipaddress.IPv4Network(f"0.0.0.0/{mask}")