window下组播软件，qt工程

#include "mainwindow.h" #include "ui_mainwindow.h" #include <stdio.h> #include <winsock2.h> #include <ws2tcpip.h> #include <QDebug> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); } MainWindow::~MainWindow() { delete ui; } void MainWindow::on_pushButton_clicked() { WSADATA wsaData; WSAStartup(MAKEWORD(2, 2), &wsaData); SOCKET sock = socket(AF_INET, SOCK_DGRAM, 0); sockaddr_in addr; addr.sin_family = AF_INET; addr.sin_addr.S_un.S_addr = INADDR_ANY; addr.sin_port = htons(8888); bind(sock, (sockaddr*)&addr, sizeof(addr)); // 加入组播啦 ip_mreq multiCast; multiCast.imr_interface.S_un.S_addr = INADDR_ANY; multiCast.imr_multiaddr.S_un.S_addr = inet_addr("234.2.2.2"); setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char*)&multiCast, sizeof(multiCast)); int len = sizeof(sockaddr); while(true) { char buf[100] = {0}; int num = recvfrom(sock, buf, sizeof(buf) - 1, 0, (sockaddr*)&addr, &len); qDebug()<<"长度:"<<num; //printf("%s\n",buf); } closesocket(sock); WSACleanup(); return; }