[网络协议]udp网络测速

 #include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    sendNum = 0;
    recvNum = 0;
    recentRecvNum = 0;
    recentSendNum = 0;
    stop = false;

    time = new QTimer();
    time->setInterval(1000);
    connect(time,SIGNAL(timeout()),this,SLOT(sendSpeed()));
    time1 = new QTimer();
    time1->setInterval(1000);
    connect(time1,SIGNAL(timeout()),this,SLOT(recvSpeed()));

    initData();
    initSock();
}

MainWindow::~MainWindow()
{
    delete ui;
    stop = true;
}

//初始化SOCKET
void MainWindow::initSock()
{
    WSADATA wsaData;
    WORD version=MAKEWORD(2,0);
    int ret=WSAStartup(version,&wsaData);
    if(ret!=0)
        printf("初始化失败");
    sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
    if(sock == INVALID_SOCKET)
    {
        printf("winsocket error !");
        return;
    }
    socksend = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
    if(socksend == INVALID_SOCKET)
    {
        printf("winsocket error !");
        return;
    }

    struct timeval t;
    t.tv_sec = 5;
    t.tv_usec = 0;
    setsockopt(sock,SOL_SOCKET,SO_RCVTIMEO ,(const char *)&t,sizeof (t));
    setsockopt(socksend,SOL_SOCKET,SO_SNDTIMEO ,(const char *)&t,sizeof (t));

//    //绑定ip和端口
//    src_addr.sin_family = AF_INET;
//    src_addr.sin_port = htons(10041);
//    src_addr.sin_addr.S_un.S_addr = inet_addr("192.168.1.140");
//    src_addr_len = sizeof(src_addr);
//    if(bind(sock, (struct sockaddr *)&src_addr, src_addr_len) == SOCKET_ERROR)
//    {
//        qDebug()<<"bind error!";
//        return;
//    }
//    //发送ip和端口
//    addr.sin_family = AF_INET;
//    addr.sin_port = htons(10041);
//    addr.sin_addr.S_un.S_addr = inet_addr("192.168.1.161");
//    addr_len = sizeof(addr);
}


//向对方发送定长数据
void MainWindow::sendMsg()
{
    qDebug()<<"开始发送数据！";

    while(1){
        if(stop){
            break;
        }
        int nRetSent = sendto(socksend, sendData, 65507 , 0, (sockaddr *)&addr, addr_len);
        if(nRetSent == 0){
            WSACleanup();
            closesocket(sock);
            char errBuf[16];
            qDebug()<< itoa(WSAGetLastError(), errBuf, sizeof(errBuf));
        }
        if(nRetSent>0){
//            printf("ip: %s,port : %d\n",inet_ntoa(addr.sin_addr),ntohs(addr.sin_port));
            qDebug()<<"send success ,ip:"<<inet_ntoa(addr.sin_addr)<<" port:"<<ntohs(addr.sin_port)<<" nRetSent"<<nRetSent;
            sendMutex.lock();
            sendNum++;
            sendMutex.unlock();
        }
    }
}

//接收对方发送定长数据
void MainWindow::recvMsg()
{
    qDebug()<<"开始接收数据！";

    int length = 64*1024;
    char buffer[length];

    struct sockaddr_in cliaddr;
    int len = sizeof(cliaddr);
    while(1){
        if(stop){
            break;
        }
        int count = recvfrom(sock,buffer,length,0,(LPSOCKADDR)&cliaddr,&len);
        if(count > 0){
            recvMutex.lock();
            recvNum++;
            recvMutex.unlock();
            qDebug()<<count<< "recv success ,ip:"<<inet_ntoa(cliaddr.sin_addr)<<" port:"<<ntohs(cliaddr.sin_port);
//            printf("ip: %s,port : %d",inet_ntoa(cliaddr.sin_addr),ntohs(cliaddr.sin_port));
        }else{
//            qDebug()<<count;
        }
    }
}

//创建数据源
void MainWindow::initData()
{
    QVector<u32> vec;
    QByteArray msg;
    for(u32 i = 0 ;i <16384 ; i++){
        vec<<i;
        msg.append((const char *)&vec, sizeof(vec));
    }
    sendData = msg.data();
    qDebug()<<sizeof(vec[0])*vec.size()<<" "<<msg.size();
}

void MainWindow::CloseSocket()
{
    if(WSACleanup()!=0)
        printf("clean失败");
    closesocket(sock);
}

//开始按钮
void MainWindow::on_pushButton_clicked()
{
    stop = false;
    sendNum = 0;
    recvNum = 0;
    recentRecvNum = 0;
    recentSendNum = 0;

    QtConcurrent::run(this,&MainWindow::sendMsg);
    QtConcurrent::run(this,&MainWindow::recvMsg);

    time->start();
    time1->start();
}

//结束按钮
void MainWindow::on_pushButton_stop_clicked()
{
    stop = true;
    time->stop();
    time1->stop();
    qDebug()<<"结束！";
}

//计算并显示发送速度
void MainWindow::sendSpeed()
{
    double speed,currentSendNum;
    sendMutex.lock();
    currentSendNum = sendNum;
    sendMutex.unlock();

    //计算速度
    speed = (currentSendNum-recentSendNum)*60/1024;
    recentSendNum = currentSendNum;
    ui->lineEdit_send->setText(QString::number(speed));
}

//计算并显示接收速度
void MainWindow::recvSpeed()
{
    double speed,currentRecvNum;
    recvMutex.lock();
    currentRecvNum = recvNum;
    recvMutex.unlock();

    //计算速度
    speed = (currentRecvNum-recentRecvNum)*60/1024;
    recentRecvNum = currentRecvNum;
    ui->lineEdit_recv->setText(QString::number(speed));
}

void MainWindow::on_pushButton_connect_clicked()
{
    //绑定ip和端口
    src_addr.sin_family = AF_INET;
    src_addr.sin_port = htons(10041);
    src_addr.sin_addr.S_un.S_addr = inet_addr(ui->lineEdit_ip_local->text().toLatin1());
    src_addr_len = sizeof(src_addr);
    if(bind(sock, (struct sockaddr *)&src_addr, src_addr_len) == SOCKET_ERROR)
    {
        qDebug()<<"bind error!";
        return;
    }
    //发送ip和端口
    addr.sin_family = AF_INET;
    addr.sin_port = htons(10041);
    addr.sin_addr.S_un.S_addr = inet_addr(ui->lineEdit_ip->text().toLatin1());
    addr_len = sizeof(addr);
}