C++发送UDP数据

最新推荐文章于 2025-04-07 16:42:48 发布

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最新推荐文章于 2025-04-07 16:42:48 发布

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文章标签： c++ udp 开发语言

本文链接：https://blog.youkuaiyun.com/qq_38220144/article/details/141022006

版权

#include <winsock2.h>
#include <WS2tcpip.h>
#include <iostream>

using namespace  std;

//添加动态库的lib
#pragma comment(lib, "ws2_32.lib")

int main() {
    SOCKET m_Socket;
    SOCKADDR_IN m_RemoteAddress; //远程地址
    int m_RemoteAddressLen;

    // socket环境
    WSADATA  wsaData;
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        cout << "WSAStartup error:" << GetLastError() << endl;
        return false;
    }

    // socket对象
    m_Socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
    if (m_Socket == INVALID_SOCKET)
    {
        closesocket(m_Socket);
        m_Socket = INVALID_SOCKET;
        return false;
    }

    // 远端地址
    const char* ip = "127.0.0.1";
    int	port = 8881;
    m_RemoteAddress.sin_family = AF_INET;
    m_RemoteAddress.sin_port = htons(port);
    m_RemoteAddressLen = sizeof(m_RemoteAddress);
    inet_pton(AF_INET, ip, &m_RemoteAddress.sin_addr);

    // 接收和发送
    char sendBuf[1024] = "180000001801";

    while (1) {
        int sendLen = sendto(m_Socket, sendBuf, strlen(sendBuf), 0, (sockaddr*)&m_RemoteAddress, m_RemoteAddressLen);
    }

    closesocket(m_Socket);
    WSACleanup();
    return true;
}