[OpenWrt-Devel] [PATCH] netifd: Don't append 6rd dhcp option when iface6rd is empty

[Hans Dedecker]

Signed-off-by: Hans Dedecker <dedeckeh at gmail.com>
---
 package/network/config/netifd/files/lib/netifd/proto/dhcp.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/network/config/netifd/files/lib/netifd/proto/dhcp.sh b/package/network/config/netifd/files/lib/netifd/proto/dhcp.sh
index d4c483d..b042267 100755
--- a/package/network/config/netifd/files/lib/netifd/proto/dhcp.sh
+++ b/package/network/config/netifd/files/lib/netifd/proto/dhcp.sh
@@ -40,7 +40,7 @@ proto_dhcp_setup() {
 	[ "$broadcast" = 1 ] && broadcast="-B" || broadcast=
 	[ -n "$clientid" ] && clientid="-x 0x3d:${clientid//:/}" || clientid="-C"
 	[ -n "$iface6rd" ] && proto_export "IFACE6RD=$iface6rd"
-	[ "$iface6rd" != 0 -a -f /lib/netifd/proto/6rd.sh ] && append dhcpopts "-O 212"
+	[ "${iface6rd:-0}" != 0 -a -f /lib/netifd/proto/6rd.sh ] && append dhcpopts "-O 212"
 	[ -n "$zone6rd" ] && proto_export "ZONE6RD=$zone6rd"
 	[ -n "$zone" ] && proto_export "ZONE=$zone"
 	[ -n "$mtu6rd" ] && proto_export "MTU6RD=$mtu6rd"
-- 
1.9.1
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