From 960608c8b50e711a5409594529744c0705f2dd58 Mon Sep 17 00:00:00 2001
From: Stefan Schantl <stefan.schantl@ipfire.org>
Date: Mon, 4 Apr 2022 21:43:20 +0200
Subject: [PATCH] rules.pl: Add function to check if given firewall chain
 exists.

Signed-off-by: Stefan Schantl <stefan.schantl@ipfire.org>
---
 config/firewall/rules.pl | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/config/firewall/rules.pl b/config/firewall/rules.pl
index c12e8fa6e4..1bd2920591 100644
--- a/config/firewall/rules.pl
+++ b/config/firewall/rules.pl
@@ -976,6 +976,14 @@ sub firewall_is_in_subnet {
 	return 0;
 }
 
+sub firewall_chain_exists ($) {
+	my ($chain) = @_;
+
+	my $ret = &General::system("iptables", "--wait", "-n", "-L", "$chain");
+
+	return $ret;
+}
+
 sub ipset_get_sets () {
 	my @sets;
 
-- 
2.39.5