用C++做一个 客户端发送数据服务端接收数据然后服务端以此数据来执行cmd指令。需要注意的是服务端不要显示控制台

以下是一个使用C++编写的客户端发送数据，服务端接收数据并执行cmd指令的示例代码。在服务端中，使用了CreateProcess函数来执行cmd指令，并将输出重定向到一个文件中，以避免在控制台中显示。

客户端代码（client.cpp）：

#include <iostream>
#include <winsock2.h>

#pragma comment(lib, "ws2_32.lib")

#define SERVER_IP "127.0.0.1"
#define SERVER_PORT 8888

int main() {
    WSADATA wsaData;
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        std::cerr << "Failed to initialize winsock" << std::endl;
        return 1;
    }

    SOCKET clientSocket = socket(AF_INET, SOCK_STREAM, 0);
    if (clientSocket == INVALID_SOCKET) {
        std::cerr << "Failed to create socket" << std::endl;
        WSACleanup();
        return 1;
    }

    sockaddr_in serverAddr{};
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_port = htons(SERVER_PORT);
    serverAddr.sin_addr.s_addr = inet_addr(SERVER_IP);

    if (connect(clientSocket, (sockaddr*)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR) {
        std::cerr << "Failed to connect to server" << std::endl;
        closesocket(clientSocket);
        WSACleanup();
        return 1;
    }

    char buffer[1024];
    memset(buffer, 0, sizeof(buffer));
    std::cout << "Enter command to execute on server: ";
    std::cin.getline(buffer, sizeof(buffer));

    send(clientSocket, buffer, strlen(buffer), 0);

    closesocket(clientSocket);
    WSACleanup();

    return 0;
}

服务端代码（server.cpp）：

#include <iostream>
#include <winsock2.h>
#include <windows.h>

#pragma comment(lib, "ws2_32.lib")

#define SERVER_PORT 8888

int main() {
    WSADATA wsaData;
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        std::cerr << "Failed to initialize winsock" << std::endl;
        return 1;
    }

    SOCKET serverSocket = socket(AF_INET, SOCK_STREAM, 0);
    if (serverSocket == INVALID_SOCKET) {
        std::cerr << "Failed to create socket" << std::endl;
        WSACleanup();
        return 1;
    }

    sockaddr_in serverAddr{};
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_port = htons(SERVER_PORT);
    serverAddr.sin_addr.s_addr = INADDR_ANY;

    if (bind(serverSocket, (sockaddr*)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR) {
        std::cerr << "Failed to bind socket" << std::endl;
        closesocket(serverSocket);
        WSACleanup();
        return 1;
    }

    if (listen(serverSocket, SOMAXCONN) == SOCKET_ERROR) {
        std::cerr << "Failed to listen" << std::endl;
        closesocket(serverSocket);
        WSACleanup();
        return 1;
    }

    std::cout << "Waiting for client connection..." << std::endl;

    SOCKET clientSocket = accept(serverSocket, NULL, NULL);
    if (clientSocket == INVALID_SOCKET) {
        std::cerr << "Failed to accept client connection" << std::endl;
        closesocket(serverSocket);
        WSACleanup();
        return 1;
    }

    char buffer[1024];
    memset(buffer, 0, sizeof(buffer));

    int bytesReceived = recv(clientSocket, buffer, sizeof(buffer), 0);
    if (bytesReceived == SOCKET_ERROR) {
        std::cerr << "Failed to receive data from client" << std::endl;
        closesocket(clientSocket);
        closesocket(serverSocket);
        WSACleanup();
        return 1;
    }

    std::cout << "Received command from client: " << buffer << std::endl;

    // 执行cmd指令并将输出重定向到文件中
    STARTUPINFO si{};
    si.cb = sizeof(si);
    si.dwFlags = STARTF_USESTDHANDLES;
    si.hStdInput = NULL;
    si.hStdOutput = CreateFile("output.txt", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
    si.hStdError = CreateFile("output.txt", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);

    PROCESS_INFORMATION pi{};
    if (!CreateProcess(NULL, buffer, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi)) {
        std::cerr << "Failed to execute command" << std::endl;
        closesocket(clientSocket);
        closesocket(serverSocket);
        WSACleanup();
        return 1;
    }

    WaitForSingleObject(pi.hProcess, INFINITE);

    CloseHandle(pi.hProcess);
    CloseHandle(pi.hThread);

    std::cout << "Command executed successfully. Check 'output.txt' for output." << std::endl;

    closesocket(clientSocket);
    closesocket(serverSocket);
    WSACleanup();

    return 0;
}

请确保在编译和运行代码之前已经安装了Visual Studio和winsock库。编译并运行客户端和服务端代码后，您可以在客户端输入要执行的cmd指令，然后服务端将执行该指令并将输出写入到名为“output.txt”的文件中，而不会在控制台中显示