TcpClient的接收数据不正确地(tcpclient receiving data incorr

2019-09-17 04:49发布

不知道这是的TcpClient或别的东西,我已经使用网络嗅探器来检查什么正在发送和从服务器接收的数据是正确的但是我的软件错误地接收数据。

让我解释一下,我发送查询字节(05)我得到一个确认回(06),那么我发送一些数据,有9B字节开始,一旦这已派出那么我应该得到一个06字节,然后之后字节我应该拿到C5字节,但是根据我的软件,我根据嗅探器获得其他06个字节是不是这样的!

byte[] buff;
if (!this.isConnected())
    this.connect(); 

NetworkStream gs = _Socket.GetStream();

gs.Write(enq, 0, enq.Length);
gs.Flush();
outputByte(enq, "Trans"); //outputs ---> 05

buff = new byte[1];
gs.Read(buff, 0, buff.Length);
gs.Flush();
outputByte(buff, "Rec");// outputs <--- 06

if (buff[0] == 0x06)
{
    byte[] data = new byte[] {
                                            0x9B, 0x00,         0x80, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x09,         
        0x67, 0x11, 0x01, 0x49, 0x4D, 0x41, 0x47, 0x45,         0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,         
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,         0x01, 0x53, 0x75, 0x6D, 0x6D, 0x61, 0x72, 0x79,         
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,         
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,         0x00, 0x00, 0x02, 0x08, 0x00, 0x00, 0x08, 0x00,         
        0x00, 0x00, 0x1F, 0x09, 0x01, 0x00, 0x04, 0x0A,         0x10, 0x00, 0x12, 0x01, 0x1F, 0x00, 0x00, 0x00,         
        0x05, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,         0x12, 0x10, 0x1E, 0x0E, 0x1E, 0x54, 0x65, 0x73,         
        0x74, 0x69, 0x6E, 0x67, 0x10, 0x00, 0x12, 0x01,         0x1F, 0x00, 0x00, 0x00, 0x05, 0x00, 0x01, 0x00,         
        0x00, 0x00, 0x00, 0x00, 0x12, 0x10, 0x0D, 0x00,         0x00, 0x90
    };
    outputByte(data, "Trans"); /outputs --> with above byte information
    gs.Write(data, 0, data.Length);
    gs.Flush();

    buff = new byte[1];
    gs.Read(buff, 0, buff.Length);
    gs.Flush();
    // this is the first receive of 06
    outputByte(buff, "Rec");//outputs <--- 06

    if (buff[0] == 0x06)
    {
        gs.Flush();
        Console.WriteLine("fdsfsdfs");
        byte[] resp = new byte[5];
        gs.Read(resp, 0, resp.Length);
        gs.Flush();
        //this outputs <--- 06 but it should be showing <--- c5000100c4
        outputByte(buff, "Rec"); 
        gs.Write(ack, 0, ack.Length);
        outputByte(ack, "Trans");
        gs.Flush();
    }
}

根据嗅探这是应该发生

---> 05
<--- 06
---> 9b008000000080000009671101494d414745310000000000000000000000000000000153756d6d617279000000000000000000000000000000000000000000000000000002080000080000001f090100040a100012011f000000050001000000000012101e0e1e54657374696e67100012011f000000050001000000000012100d000090
<--- 06
<--- c5000100c4

并根据软件,这是发生了什么事

---> 05
<--- 06
---> 9b008000000080000009671101494d414745310000000000000000000000000000000153756d6d617279000000000000000000000000000000000000000000000000000002080000080000001f090100040a100012011f000000050001000000000012101e0e1e54657374696e67100012011f000000050001000000000012100d000090
<--- 06
<--- 06

有任何想法吗? 此外,如果你有关于如何提高代码的任何建议,我会感激

Answer 1:

在这里:你输出了错误的缓冲区:

    gs.Read(resp, 0, resp.Length);
    gs.Flush();

    outputByte(buff, "Rec");  <==== should be "resp"

然而!!!

所有的阅读通话被打破; 他们必须处理的返回值,读取多个字节时尤其如此 。 数据包碎片会杀了你的代码。

正确的“准确读数[n]的字节”的方法将是:

public static void ReadExact(this Stream stream, byte[] buffer,
           int offset, int count) {
    int read;
    while(count > 0 && (read = stream.Read(buffer, offset, count)) > 0) {
        count -= read;
        offset += read;
    }
    if(count != 0) throw new EndOfStreamException();
}

然后:

gs.ReadExact(resp, 0, resp.Length);

将填写正确,或者错误,如果没有足够的数据是流。



文章来源: tcpclient receiving data incorrectly
标签: c# tcpclient