C++之Socket简单使用

在系统目录C:\Program Files (x86)\Windows Kits\10\Lib\10.0.22000.0\um\x64下找到静态库WS2_32.Lib,并将其拷贝至工程lib目录下(这个库里面封装的有socket相关的函数实现)

// CMakeLists.txt 文件内容如下
cmake_minimum_required(VERSION 3.23)
project(test2)
set(CMAKE_CXX_STANDARD 14)
link_directories(lib)
link_libraries(WS2_32.Lib)
add_executable(test2 main.cpp)

// main.cpp 文件源码如下
#include <iostream>
#include <ws2dnet.h>
void sendMsgToClient(SOCKET *clientSocket);
void acceptClient(SOCKET *serverSocket, SOCKET *clientSocket);

int main() {
    WSADATA wsadata;
    WSAStartup(MAKEWORD(2, 2), &wsadata);
    SOCKET serverSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (serverSocket == INVALID_SOCKET) {
        std::cout << "socket出错" << std::endl;
        return 1;
    } else {
        sockaddr_in sockAddr;   // 创建套接字地址
        memset(&sockAddr, 0, sizeof(sockAddr)); // 用0填充每个字节
        sockAddr.sin_family = PF_INET;  // 使用PF_INET地址族，也就是IPv4
        sockAddr.sin_addr.s_addr = inet_addr("192.168.0.106");  // 具体监听的网卡
        sockAddr.sin_port = htons(4196);    // 端口
        bind(serverSocket, (SOCKADDR *) &sockAddr, sizeof(SOCKADDR));
        if (listen(serverSocket, 10) == SOCKET_ERROR) {
            std::cout << "listen err" << std::endl;
            return 1;
        }
    }
    SOCKET clientSocket;
    acceptClient(&serverSocket, &clientSocket);
    sendMsgToClient(&clientSocket);
    closesocket(serverSocket);
    closesocket(clientSocket);
    WSACleanup();
    return 0;
}


void acceptClient(SOCKET *serverSocket, SOCKET *clientSocket) {
    sockaddr_in client_sin;
    int len = sizeof(client_sin);
    *clientSocket = accept(*serverSocket, (sockaddr *) &client_sin, &len);
    std::cout << "now client is coming" << std::endl;
}


void sendMsgToClient(SOCKET *clientSocket) {
    char a;
    for (int i = 0; i < 100; ++i) {
        for (int i = 0; i < 10; ++i) {
            a = i;
            send(*clientSocket, &a, sizeof a, 0);
        }
    }
}

参考博客：
https://blog.csdn.net/weixin_42299076/article/details/124828768