// tcpListen listens for incoming TCP connections.
func (t *TcpListener) tcpListen() error {
defer t.wg.Done()
for {
select {
case <-t.done:
return nil
default:
// Accept connection:
conn, err := t.listener.AcceptTCP()
if err != nil {
return err
}
log.Printf("Received TCP Connection from %s", conn.RemoteAddr())
select {
case <-t.accept:
// not over connection limit, handle the connection properly.
t.wg.Add(1)
// generate a random id for this TCPConn
id := internal.RandomString(6)
t.remember(id, conn)
go t.handler(conn, id)
default:
// We are over the connection limit, refuse & close.
t.refuser(conn)
}
}
}
}
func tmpFile() string {
d, err := ioutil.TempDir("", "")
if err != nil {
panic(err)
}
return d + internal.RandomString(10)
}
func (m *MQTTConsumer) createOpts() (*mqtt.ClientOptions, error) {
opts := mqtt.NewClientOptions()
if m.ClientID == "" {
opts.SetClientID("Telegraf-Consumer-" + internal.RandomString(5))
} else {
opts.SetClientID(m.ClientID)
}
tlsCfg, err := internal.GetTLSConfig(
m.SSLCert, m.SSLKey, m.SSLCA, m.InsecureSkipVerify)
if err != nil {
return nil, err
}
scheme := "tcp"
if tlsCfg != nil {
scheme = "ssl"
opts.SetTLSConfig(tlsCfg)
}
user := m.Username
if user != "" {
opts.SetUsername(user)
}
password := m.Password
if password != "" {
opts.SetPassword(password)
}
if len(m.Servers) == 0 {
return opts, fmt.Errorf("could not get host infomations")
}
for _, host := range m.Servers {
server := fmt.Sprintf("%s://%s", scheme, host)
opts.AddBroker(server)
}
opts.SetAutoReconnect(true)
opts.SetKeepAlive(time.Second * 60)
opts.SetCleanSession(!m.PersistentSession)
opts.SetOnConnectHandler(m.onConnect)
opts.SetConnectionLostHandler(m.onConnectionLost)
return opts, nil
}
func (m *MQTT) createOpts() (*paho.ClientOptions, error) {
opts := paho.NewClientOptions()
opts.SetClientID("Telegraf-Output-" + internal.RandomString(5))
tlsCfg, err := internal.GetTLSConfig(
m.SSLCert, m.SSLKey, m.SSLCA, m.InsecureSkipVerify)
if err != nil {
return nil, err
}
scheme := "tcp"
if tlsCfg != nil {
scheme = "ssl"
opts.SetTLSConfig(tlsCfg)
}
user := m.Username
if user != "" {
opts.SetUsername(user)
}
password := m.Password
if password != "" {
opts.SetPassword(password)
}
if len(m.Servers) == 0 {
return opts, fmt.Errorf("could not get host infomations")
}
for _, host := range m.Servers {
server := fmt.Sprintf("%s://%s", scheme, host)
opts.AddBroker(server)
}
opts.SetAutoReconnect(true)
return opts, nil
}