QT QUdpSocket广播

#include "widget.h"

#include "ui_widget.h"

#include<QTextCodec>

Widget::Widget(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::Widget)

{

    ui->setupUi(this);

    //QTextCodec::setCodecForLocale(QTextCodec::codecForName("GB2312"));

    soc = new Socket(60005);

    connect(soc, SIGNAL(readyRead()), this, SLOT(processPendingDatagrams()));

}

Widget::~Widget()

{

    delete ui;

}

void Widget::on_pushButton_clicked()

{

    ui->textEdit->clear();

    PacketShort pktShort;

    memset(&pktShort,0,sizeof(pktShort));

    pktShort.type = 0x17;

    pktShort.functionID = 0x94;

//    char buffer[1024];

//    memset(buffer, 0, 1024);

//    memcpy(buffer, &pktShort, sizeof(pktShort));

    soc->writeDatagram((char *)&pktShort, sizeof(pktShort), QHostAddress::Broadcast, 60000);

}

void Widget::processPendingDatagrams()

  {

      while (soc->hasPendingDatagrams()) {

          QByteArray datagram;

          datagram.clear();

          int x = soc->pendingDatagramSize();

          datagram.resize(soc->pendingDatagramSize()+1);

          PacketShort pktShort;

          memset(&pktShort,0,sizeof(pktShort));

          soc->readDatagram((char *)&pktShort, soc->pendingDatagramSize());

          ui->textEdit->insertPlainText(tr("SN: \"%1\"  \n").arg(pktShort.iDevSn));

      }

  }