public function actionDisconnect($ip)
 {
     if ($model = Charge::find()->where(['ip' => $ip])->one()) {
         $model->state = 'state_disconnect';
         $model->save();
     }
     $telnet = new Telnet();
     $telnet->signin();
     $telnet->rebind($ip, "eeee-eeee-eeee");
     $telnet->close();
     return $this->redirect(['index']);
 }
 public function getCharge()
 {
     return $this->hasOne(Charge::className(), ['ip' => 'ip']);
 }