Question

为了从银行服务器获取详细信息，他们将向我提供IP和PORT号码。我正在使用ISO8583消息格式（来自NuGet Manager的OpenIso8583库）发送和接收消息。请提供有关如何使用IP地址和端口号将ISO8583消息发送到银行服务器的解决方案。

public void post（） {

        var msg = new Iso8583();
        msg.MessageType = Iso8583.MsgType._0200_TRAN_REQ;

        //Following feilds are mandotary to get balanace info
        msg[Iso8583.Bit._003_PROC_CODE] = "820000";//balanace enquery
        msg[Iso8583.Bit._102_ACCOUNT_ID_1] = "0021210020320000069";//bankid(002)branchid(121)accnumber(0020320000069)           

        //send iso message to server
        var response = NetworkSend("192.32.179.171", 45510, msg);//ipaddress,port,msg

        if (response[Iso8583.Bit._039_RESPONSE_CODE] == "000")
        {
              //success

            // read data of iso message
        }

    }

    private static Iso8583 NetworkSend(string ip, int port, Iso8583 msg)
    {

        // We're going to use a 2 byte header to indicate the message length
        // which is not inclusive of the length of the header
        var msgData = new byte[msg.PackedLength + 2];

        // The two byte header is a base 256 number so we can set the first two bytes in the data 
        // to send like this
        msgData[0] = (byte)(msg.PackedLength % 256);
        msgData[1] = (byte)(msg.PackedLength / 256);

        // Copy the message into msgData
        Array.Copy(msg.ToMsg(), 0, msgData, 2, msg.PackedLength);

        // Now send the message.  We're going to behave like a terminal, which is 
        // connect, send, receive response, disconnect
        var client = new TcpClient();
        var endPoint = new IPEndPoint(IPAddress.Parse(ip), port);
        client.Connect(endPoint);
        var stream = client.GetStream();

        // Send the packed message
        stream.Write(msgData, 0, msgData.Length);

        // Receive the response

        // First we need to get the length of the message out of the socket
        var lengthHeader = new byte[2];
        stream.Read(lengthHeader, 0,2);//this line giving error

        // Work out the length of the incoming message
        var rspLength = lengthHeader[0] * 256 + lengthHeader[1];
        var rspData = new byte[rspLength];

        // Read the bytes off the network stream
        stream.Read(rspData, 0, rspLength);

        // Close the network stream and client
        stream.Close();
        client.Close();

        // Parse the data into an Iso8583 message and return it
        var rspMsg = new Iso8583();

        rspMsg.Unpack(rspData, 0);
        return rspMsg;
    }

Answer 1

您的第一个问题在于邮件的打包。应交换msgdata [0]和msgdata [1]的值，否则主机的期望远远超过您发送的内容。

至于等待传入数据的部分，由于数据包碎片，我遇到了同样的问题。我所做的是将一个OnReceived事件添加到我的套接字，在这个事件中，我的第一次读取检查收到的数据是否超过1个字节。如果是这样，前2个字节是我的长度指示器，我继续读取并附加到缓冲区，直到我达到长度指示器指示的总数，或者直到发生超时。我通过递归重新输入OnReceived事件来做到这一点，直到没有剩余的字节要读。

Answer 2

这是一种通过网络发送iso消息的方法

public static string Send(Iso8583 msg, string IP, int Port)
{
    var messagebits = msg.ToMsg();
    string result = "";
    try
    {
        TcpClient tcpclnt = new TcpClient();
        tcpclnt.Connect(IP, Port);
        Stream stream = tcpclnt.GetStream();

        ASCIIEncoding asen = new ASCIIEncoding();
        stream.Write(messagebits, 0, messagebits.Length);

        var lengthHeader = new byte[2];
        stream.Read(lengthHeader, 0, 2);

        var rspLength = lengthHeader[0] * 256 + lengthHeader[1];
        var rspData = new byte[rspLength];

        stream.Read(rspData, 0, rspLength);
        tcpclnt.Close();
        Iso8583 msgIso = new Iso8583();
        msgIso.Unpack(rspData, 0);
    }
    catch (Exception) { }
    return result;
}

如何使用c＃

2 个答案: