public void onDnsNotify(string ipString)
 {
     print(ipString);
     string[] sArray = ipString.Split(new char[] { ';' });
     if (sArray != null && sArray.Length > 1)
     {
         if (!sArray [1].Equals("0"))
         {
             //使用建议:当ipv6地址存在时,优先使用ipv6地址
             //TODO 使用ipv6地址进行连接,注意格式,ipv6需加方框号[ ]进行处理,例如:http://[64:ff9b::b6fe:7475]/
             result.text = "ipv6 address exist:" + sArray [1] + ", suggest to use ipv6 address.";
         }
         else if (!sArray [0].Equals("0"))
         {
             //使用ipv4地址进行连接
             result.text = "ipv6 address not exist, use the ipv4 address:" + sArray [0] + " to connect.";
         }
         else
         {
             //异常情况返回为0,0,建议重试一次
             print("ReStartSyncClick");
             print(domainStr);
             if (domainStr == null || domainStr.Equals(""))
             {
                 domainStr = "www.qq.com";
                 print("input is null, use the default domain:www.qq.com.");
                 result.text = "input is null, use the default domain:www.qq.com.";
             }
             HttpDns.GetAddrByNameAsync(domainStr);
         }
     }
 }
    public void StartAsyncClick()
    {
        // vip vport area
        print("StartAsyncClick");
        string domainStr = domain.text;

        print(domainStr);
        if (domainStr == null || domainStr.Equals(""))
        {
            domainStr = "www.qq.com";
            print("input is null, use the default domain:www.qq.com.");
            result.text = "input is null, use the default domain:www.qq.com.";
        }
        HttpDns.GetAddrByNameAsync(domainStr);
    }