add mqtt listenner

server/server.go

@@ -41,6 +41,7 @@ type Server struct {
 	unixListener      net.Listener
 	smtpServer        *smtp.Server
 	smtpServerBackend *smtpBackend
+	mqttServerBackend *mqttBackend
 	smtpSender        mailer
 	topics            map[string]*topic
 	visitors          map[netip.Addr]*visitor
@@ -228,6 +229,11 @@ func (s *Server) Run() error {
 			errChan <- s.runSMTPServer()
 		}()
 	}
+	if s.config.MqttServer != "" {
+		go func() {
+			s.runMqttServer()
+		}()
+	}
 	s.mu.Unlock()
 	go s.runManager()
 	go s.runDelayedSender()
@@ -1221,6 +1227,13 @@ func (s *Server) runSMTPServer() error {
 	return s.smtpServer.ListenAndServe()
 }
 
+func (s *Server) runMqttServer() {
+	s.mqttServerBackend = newMqttBackend(s.config, s.handle)
+	s.mqttServerBackend.Connect()
+	s.mqttServerBackend.Subscribe()
+	return
+}
+
 func (s *Server) runManager() {
 	for {
 		select {