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docker/router-dash/app/action_apply_iface_config.py

@@ -4,6 +4,7 @@ from flask import Blueprint, request, redirect, flash
 from auth import require_level
 from config_utils import verify_core_hash, queued_msg, queue_command
 import sanitize
+import validation as validate
 
 bp = Blueprint('action_apply_iface_config', __name__)
 
@@ -47,11 +48,8 @@ def apply_iface_config():
 
     mtu_int = None
     if mtu:
-        try:
-            mtu_int = int(mtu)
-            if not (68 <= mtu_int <= 9000):
-                raise ValueError
-        except ValueError:
+        mtu_int = validate.int_range(mtu, 68, 9000)
+        if mtu_int is None:
             flash('MTU must be an integer between 68 and 9000.', 'error')
             return redirect(_VIEW)