From a7aa5ac5b3eb459fb41dfd315720e2c7679d357e Mon Sep 17 00:00:00 2001
From: Urban Ishimwe <urbainishimwe@gmail.com>
Date: Tue, 5 Jan 2021 21:47:22 +0200
Subject: [PATCH] fix #887 (#878)

---
 capture/capture.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/capture/capture.go b/capture/capture.go
index d77d1f7..64f2579 100644
--- a/capture/capture.go
+++ b/capture/capture.go
@@ -468,7 +468,7 @@ func cutMask(addr net.Addr) string {
 }
 
 func isDevice(addr string, ifi net.Interface) bool {
-	return addr == ifi.Name || addr == fmt.Sprintf("%d", ifi.Index) || addr == ifi.HardwareAddr.String()
+	return addr == ifi.Name || addr == fmt.Sprintf("%d", ifi.Index) || (addr != "" && addr == ifi.HardwareAddr.String())
 }
 
 func listenAll(addr string) bool {