X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/c6537133132fa5acf0bdd024e6793ff095d8284f..667c11ec829a7484032012fd6098b9fcb4bf02d6:/package/firewall/files/lib/fw.sh

diff --git a/package/firewall/files/lib/fw.sh b/package/firewall/files/lib/fw.sh
index 3549f8aa4..16a39b6a6 100644
--- a/package/firewall/files/lib/fw.sh
+++ b/package/firewall/files/lib/fw.sh
@@ -218,3 +218,12 @@ fw_get_family_mode() {
 	esac
 }
 
+fw_get_negation() {
+	local _var="$1"
+	local _flag="$2"
+	local _ipaddr="$3"
+
+	[ "${_ipaddr#!}" != "$_ipaddr" ] && \
+		export -n -- "$_var=! $_flag ${_ipaddr#!}" || \
+		export -n -- "$_var=${_ipaddr:+$_flag $_ipaddr}"
+}