p2p/nat: delete port mapping before adding (#15222)

Fixes #1024
2017-10-06 07:39:47 -04:00 · 2017-10-06 07:39:47 -04:00 · d54e3539d4
commit d54e3539d4
parent 5df0b240ae
1 changed files with 1 additions and 0 deletions
--- a/p2p/nat/natupnp.go
+++ b/p2p/nat/natupnp.go
@ -62,6 +62,7 @@ func (n *upnp) AddMapping(protocol string, extport, intport int, desc string, li
 	}
 	protocol = strings.ToUpper(protocol)
 	lifetimeS := uint32(lifetime / time.Second)
+	n.DeleteMapping(protocol, extport, intport)
 	return n.client.AddPortMapping("", uint16(extport), protocol, uint16(intport), ip.String(), true, desc, lifetimeS)
 }