Add integrationtest utility

network/state/system_default.go

@@ -1,3 +1,4 @@
+//go:build !windows && !linux
 // +build !windows,!linux
 
 package state
@@ -38,6 +39,8 @@ func getUDP6Table() (binds []*socket.BindInfo, err error) {
 	return nil, nil
 }
 
-func checkPID(socketInfo socket.Info, connInbound bool) (pid int, inbound bool, err error) {
+// CheckPID checks the if socket info already has a PID and if not, tries to find it.
+// Depending on the OS, this might be a no-op.
+func CheckPID(socketInfo socket.Info, connInbound bool) (pid int, inbound bool, err error) {
 	return socketInfo.GetPID(), connInbound, nil
 }