From 28b312d687291cef1e3935b7f39dc28b9e7976ef Mon Sep 17 00:00:00 2001
From: Viacheslav Hletenko <v.gletenko@vyos.io>
Date: Thu, 20 Oct 2022 11:51:32 +0000
Subject: T4762: Add check for show nat if nat config does not exist
Add check for 'show nat xxx' if nat configuration does not exist
---
src/op_mode/nat.py | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/src/op_mode/nat.py b/src/op_mode/nat.py
index 845dbbb2c..f899eb3dc 100755
--- a/src/op_mode/nat.py
+++ b/src/op_mode/nat.py
@@ -22,12 +22,18 @@ import xmltodict
from sys import exit
from tabulate import tabulate
+from vyos.configquery import ConfigTreeQuery
+
from vyos.util import cmd
from vyos.util import dict_search
import vyos.opmode
+base = 'nat'
+unconf_message = 'NAT is not configured'
+
+
def _get_xml_translation(direction, family):
"""
Get conntrack XML output --src-nat|--dst-nat
@@ -277,6 +283,20 @@ def _get_formatted_translation(dict_data, nat_direction, family):
return output
+def _verify(func):
+ """Decorator checks if NAT config exists"""
+ from functools import wraps
+
+ @wraps(func)
+ def _wrapper(*args, **kwargs):
+ config = ConfigTreeQuery()
+ if not config.exists(base):
+ raise vyos.opmode.UnconfiguredSubsystem(unconf_message)
+ return func(*args, **kwargs)
+ return _wrapper
+
+
+@_verify
def show_rules(raw: bool, direction: str, family: str):
nat_rules = _get_raw_data_rules(direction, family)
if raw:
@@ -285,6 +305,7 @@ def show_rules(raw: bool, direction: str, family: str):
return _get_formatted_output_rules(nat_rules, direction, family)
+@_verify
def show_statistics(raw: bool, direction: str, family: str):
nat_statistics = _get_raw_data_rules(direction, family)
if raw:
@@ -293,6 +314,7 @@ def show_statistics(raw: bool, direction: str, family: str):
return _get_formatted_output_statistics(nat_statistics, direction)
+@_verify
def show_translations(raw: bool, direction: str, family: str):
family = 'ipv6' if family == 'inet6' else 'ipv4'
nat_translation = _get_raw_translation(direction, family)
--
cgit v1.2.3