fixed recv_errors spoofing condition (#482)

Hi @nbrownus
Fixed a small bug that was introduced in
df7c7ee#diff-5d05d02296a1953fd5fbcb3f4ab486bc5f7c34b14c3bdedb068008ec8ff5beb4
having problems due to it

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Valid recv_error packets were incorrectly marked as "spoofing" and ignored. (#482)
+
 ## [1.4.0] - 2021-05-11
 
 ### Added

outside.go

@@ -340,7 +340,7 @@ func (f *Interface) handleRecvError(addr *udpAddr, h *Header) {
 	if !hostinfo.RecvErrorExceeded() {
 		return
 	}
-	if hostinfo.remote != nil && hostinfo.remote.Equals(addr) {
+	if hostinfo.remote != nil && !hostinfo.remote.Equals(addr) {
 		f.l.Infoln("Someone spoofing recv_errors? ", addr, hostinfo.remote)
 		return
 	}