fix ifindex detection

diff --git a/src/config.c b/src/config.c
index 98a826f..ed80bef 100644 (file)
--- a/src/config.c
+++ b/src/config.c
@@ -497,7 +497,7 @@ int config_parse_interface(void *data, size_t len, const char *name, bool overwr
                }
        }
 
-       iface->ignore = (iface->ifindex = if_nametoindex(iface->ifname)) < 0;
+       iface->ignore = (iface->ifindex = if_nametoindex(iface->ifname)) <= 0;
        return 0;
 
 err: