Question

我是C＃编程的新手，我正在尝试编写TCP客户端，通过十六进制代码从服务器端读取一些元数据，将十六进制代码发送到服务器。我设法连接服务器但无法发送十六进制代码你能不能看看我在这里缺少的东西。

using System;
using System.IO;
using System.Text;
using System.Net.Sockets;


public class clnt
{

public static void Main()
{

    try
    {
        TcpClient tcpclnt = new TcpClient();
        Console.WriteLine("Connecting...");

        tcpclnt.Connect("192.168.80.128", 557);
        // use the ip address as in the server program

        Console.WriteLine("Connected!");
        Console.WriteLine("Sending Hex Code...");


        string str = Console.ReadLine();
        Stream stm = tcpclnt.GetStream();


        ASCIIEncoding asen = new ASCIIEncoding();
        byte[] ba = asen.GetBytes(str);
        var data = new byte[] { 0xCF, 0xC4 };
        Console.WriteLine("Transmitting");

        stm.Write(ba, 0, ba.Length);

        byte[] bb = new byte[100];
        int k = stm.Read(bb, 0, 100);

        for (int i = 0; i < k; i++)
            Console.Write(Convert.ToChar(bb[i]));

        tcpclnt.Close();
    }

    catch (Exception e)
    {
        Console.WriteLine("Opps " + e.StackTrace);
    }
}

}


C++ code;
int main()
    {
client.Initialize("192.168.80.128", 557);

std::this_thread::sleep_for(std::chrono::seconds(2));

std::string xid = U8("NASA_Arnold_AFB_Airshow");

std::vector<std::uint8_t> command = {0xCF, 0xC4};

command.push_back(static_cast<std::uint8_t>(xid.length()));

command.insert(command.end(), xid.begin(), xid.end());

std::cout << command.size() << std::endl;

client.Correspond(command, 10);

std::this_thread::sleep_for(std::chrono::seconds(3));

command.clear();

command = {0xC8, 0xC3};

std::cout << client.Response().size() << std::endl;

std::vector<std::uint8_t> idhandle(client.Response().begin() + 2, client.Response().end());

command.insert(command.end(), idhandle.begin(), idhandle.end());

client.Correspond(command, 3);

std::this_thread::sleep_for(std::chrono::seconds(3));

for(auto element : client.Response())
    std::cout << static_cast<int>(element) << std::endl;

std::uint8_t size = client.Response().back();

std::cout << "size of xid:" << static_cast<int>(size) << std::endl;

client.ReadN(size);

std::this_thread::sleep_for(std::chrono::seconds(3));

std::cout << std::string(client.Response().begin(), client.Response().end()) << std::endl;

command.clear();

command = {0xC8, 0x4A};

command.insert(command.end(), idhandle.begin(), idhandle.end());

std::cout << idhandle.size() << std::endl;

for(auto element : idhandle)
    std::cout << static_cast<int>(element) << std::endl;

client.Correspond(command, 97);

std::this_thread::sleep_for(std::chrono::seconds(3));


std::cout << std::string(client.Response().begin(), client.Response().end()) << std::endl;



std::getchar();

return 0;
}

Answer 1

如果我理解正确，您的特定字节在数组data中。但是你不能在你的代码中使用它您似乎错过了stm.Write(data, 0, data.Length)之类的内容来发送字节0xCF和0xC4

Answer 2

您的代码提示输入：

string str = Console.ReadLine();

然后从此输入中获取字节：

byte[] ba = asen.GetBytes(str);

最后将这些字节发送到流：

stm.Write(ba, 0, ba.Length);

您是否在提示符下输入任何内容？如果没有，则不会有任何字节要发送。如果您打算发送var data = new byte[] { 0xCF, 0xC4 };，则需要使用

stm.Write(data, 0, data.Length);

通过TCP / IP发送十六进制代码

2 个答案: