T2719: handle non-existent interfaces in the neighbor script

1 files changed, 5 insertions, 0 deletions

diff --git a/src/op_mode/neighbor.py b/src/op_mode/neighbor.py
index b0b52c082..d86a372ac 100755
--- a/src/op_mode/neighbor.py
+++ b/src/op_mode/neighbor.py
@@ -32,12 +32,17 @@ import typing
 
 import vyos.opmode
 
+def interface_exists(interface):
+    import os
+    return os.path.exists(f'/sys/class/net/{interface}')
 
 def get_raw_data(family, interface=None, state=None):
     from json import loads
     from vyos.util import cmd
 
     if interface:
+        if not interface_exists(interface):
+            raise ValueError(f"Interface '{interface}' does not exist in the system")
         interface = f"dev {interface}"
     else:
         interface = ""