Fix error log

3 years ago · 7201aee2f8
1 changed files with 5 additions and 1 deletions
--- a/p2p/net/nat/nat.go
+++ b/p2p/net/nat/nat.go
@ -175,7 +175,11 @@ func (nat *NAT) establishMapping(m *mapping) {
 	if err != nil || newport == 0 {
 		m.setExternalPort(0) // clear mapping
 		// TODO: log.Event
-		log.Warnf("failed to establish port mapping: %s", err)
+		if err != nil {
+			log.Warnf("failed to establish port mapping: %s", err)
+		} else {
+			log.Warnf("failed to establish port mapping: newport = 0")
+		}
 		// we do not close if the mapping failed,
 		// because it may work again next time.
 		return