From 17eb5419a3f4f5eb95a48ba9d698735a75640ce4 Mon Sep 17 00:00:00 2001
From: Bard <admin@cooluc.com>
Date: Mon, 8 Apr 2024 06:02:01 +0800
Subject: [PATCH] nat6: silent error output

---
 files/nat6.init | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/files/nat6.init b/files/nat6.init
index fd8042c..ee10d83 100644
--- a/files/nat6.init
+++ b/files/nat6.init
@@ -14,7 +14,7 @@ interface() {
 			device=$(uci -q show network.$alias_interface.device | grep -o "'.*'" | awk -F"'" '{print $2}')
 			if [ -z $(uci -q show network.$alias_interface.device) ]; then
 				ipaddr=$(uci -q show network.$alias_interface.ipaddr | grep -o "'.*'" | awk -F"'" '{print $2}')
-				device=$(ifconfig | grep -B 1 $ipaddr | head -1 | awk '{print $1}')
+				device=$(ifconfig | grep -B 1 $ipaddr 2>/dev/null | head -1 | awk '{print $1}')
 			fi
 		fi
 		if [ $(ifconfig $device | grep -c "inet6 addr") -gt 0 ]; then
@@ -56,6 +56,8 @@ EOF
 start() {
 	[ "$(uci -q get firewall.@defaults[0].nat6)" != 1 ] && return 0
 	interface
+	[ -z "$device" ] && logger -p error -t network -s "nat6: DHCPv6 interface device not configured, IPv6 NAT failed." && exit 0
+	[ -z "$gateway" ] && logger -p error -t network -s "nat6: DHCPv6 gateway not found, IPv6 NAT failed." && exit 0
 	common_config
 	ip -6 r add default via $gateway dev $device 2>/dev/null
 	nft delete table ip6 nat 2>/dev/null