kea: T7925: Improve error handling, validate IPv6 PD prefix length

1 files changed, 10 insertions, 1 deletions

diff --git a/python/vyos/kea.py b/python/vyos/kea.py
index 5ce6f47f1..f48cf293d 100644
--- a/python/vyos/kea.py
+++ b/python/vyos/kea.py
@@ -15,6 +15,7 @@
 
 import json
 import os
+import re
 import socket
 
 from datetime import datetime
@@ -25,7 +26,7 @@ from vyos.template import is_ipv6
 from vyos.template import netmask_from_cidr
 from vyos.utils.dict import dict_search_args
 from vyos.utils.file import file_permissions
-from vyos.utils.process import run
+from vyos.utils.process import run, rc_cmd
 
 kea4_options = {
     'name_server': 'domain-name-servers',
@@ -86,6 +87,14 @@ def _find_list_of_dict_index(lst, key='ip', value=''):
     idx = next((index for (index, d) in enumerate(lst) if d[key] == value), None)
     return idx
 
+def kea_test_config(process: str, config_path: str) -> tuple[bool, str]:
+    result, output = rc_cmd(f'{process} -t {config_path}')
+
+    if result == 0:
+        return (True, None)
+
+    find = re.search(r'Error encountered:\s([^\n$]+)', output)
+    return (False, find[1] if find else None)
 
 def kea_parse_options(config):
     options = []