1 files changed, 34 insertions, 0 deletions
diff --git a/src/validators/interface-name b/src/validators/interface-name
new file mode 100755
index 000000000..5bac671b1
--- /dev/null
+++ b/src/validators/interface-name
@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2021 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import re
+
+from sys import argv
+from sys import exit
+
+pattern = '^(bond|br|dum|en|ersp|eth|gnv|lan|l2tp|l2tpeth|macsec|peth|ppp|pppoe|pptp|sstp|tun|vti|vtun|vxlan|wg|wlan|wlm)[0-9]+(.\d+)?|lo$'
+
+if __name__ == '__main__':
+    if len(argv) != 2:
+        exit(1)
+    interface = argv[1]
+
+    if re.match(pattern, interface):
+        exit(0)
+    if os.path.exists(f'/sys/class/net/{interface}'):
+        exit(0)
+    exit(1)