fix case where somebody uses '-i +' as interface name (Ozgur AKAN)

1 files changed, 1 insertions, 1 deletions

diff --git a/iptables.c b/iptables.c
index ae6538c..4b0fe6c 100644
--- a/iptables.c
+++ b/iptables.c
@@ -780,7 +780,7 @@ parse_interface(const char *arg, char *vianame, unsigned char *mask)
 			   " (%i)", arg, IFNAMSIZ-1);
 
 	strcpy(vianame, arg);
-	if (vialen == 0)
+	if ((vialen == 0) || (vialen == 1 && vianame[0] == '+'))
 		memset(mask, 0, IFNAMSIZ);
 	else if (vianame[vialen - 1] == '+') {
 		memset(mask, 0xFF, vialen - 1);