Act multicast updates for safety

go.mod

@@ -17,5 +17,3 @@ require (
 	golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a
 	golang.org/x/text v0.3.2
 )
-
-go 1.13

src/admin/admin.go

@@ -60,6 +60,13 @@ func (a *AdminSocket) Init(c *yggdrasil.Core, state *config.NodeState, log *log.
 	a.handlers = make(map[string]handler)
 	current := state.GetCurrent()
 	a.listenaddr = current.AdminListen
+	a.AddHandler("list", []string{}, func(in Info) (Info, error) {
+		handlers := make(map[string]interface{})
+		for handlername, handler := range a.handlers {
+			handlers[handlername] = Info{"fields": handler.args}
+		}
+		return Info{"list": handlers}, nil
+	})
 	return nil
 }
 
@@ -75,13 +82,6 @@ func (a *AdminSocket) UpdateConfig(config *config.NodeConfig) {
 }
 
 func (a *AdminSocket) SetupAdminHandlers(na *AdminSocket) {
-	a.AddHandler("list", []string{}, func(in Info) (Info, error) {
-		handlers := make(map[string]interface{})
-		for handlername, handler := range a.handlers {
-			handlers[handlername] = Info{"fields": handler.args}
-		}
-		return Info{"list": handlers}, nil
-	})
 	a.AddHandler("getSelf", []string{}, func(in Info) (Info, error) {
 		ip := a.core.Address().String()
 		subnet := a.core.Subnet()

src/multicast/multicast.go

@@ -109,6 +109,10 @@ func (m *Multicast) Stop() error {
 // and then signals the various module goroutines to reconfigure themselves if
 // needed.
 func (m *Multicast) UpdateConfig(config *config.NodeConfig) {
+	m.Act(m, func() { m._updateConfig(config) })
+}
+
+func (m *Multicast) _updateConfig(config *config.NodeConfig) {
 	m.log.Debugln("Reloading multicast configuration...")
 	if m.IsStarted() {
 		if len(config.MulticastInterfaces) == 0 || config.LinkLocalTCPPort != m.listenPort {