PeerManager Class Reference

#include <peermanager.h>

Inheritance diagram for PeerManager:

[legend]Collaboration diagram for PeerManager:

[legend]List of all members.

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Detailed Description

Definition at line 36 of file peermanager.h.

Signals
void	newConnection (Connection *connection)
Public Member Functions
	PeerManager (Client *client)
void	setServerPort (int port)
QByteArray	userName () const
void	startBroadcasting ()
bool	isLocalHostAddress (const QHostAddress &address)
Private Slots
void	sendBroadcastDatagram ()
void	readBroadcastDatagram ()
Private Member Functions
void	updateAddresses ()
Private Attributes
Client *	client
QList< QHostAddress >	broadcastAddresses
QList< QHostAddress >	ipAddresses
QUdpSocket	broadcastSocket
QTimer	broadcastTimer
QByteArray	username
int	serverPort

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Constructor & Destructor Documentation

PeerManager::PeerManager

(

Client *

client

)

Definition at line 33 of file peermanager.cpp.

References QHostAddress::Any, QList< T >::at(), QUdpSocket::bind(), BroadcastInterval, broadcastPort, broadcastSocket, broadcastTimer, client, QObject::connect(), index, QStringList::indexOf(), QByteArray::isEmpty(), readBroadcastDatagram(), QUdpSocket::ReuseAddressHint, sendBroadcastDatagram(), serverPort, QTimer::setInterval(), QUdpSocket::ShareAddress, SIGNAL, QList< T >::size(), SLOT, QString::split(), QProcess::systemEnvironment(), QString::toUtf8(), updateAddresses(), and username.

    : QObject(client)
{
    this->client = client;

    QStringList envVariables;
    envVariables << "USERNAME.*" << "USER.*" << "USERDOMAIN.*"
                 << "HOSTNAME.*" << "DOMAINNAME.*";

    QStringList environment = QProcess::systemEnvironment();
    foreach (QString string, envVariables) {
        int index = environment.indexOf(QRegExp(string));
        if (index != -1) {
            QStringList stringList = environment.at(index).split("=");
            if (stringList.size() == 2) {
                username = stringList.at(1).toUtf8();
                break;
            }
        }
    }

    if (username.isEmpty())
        username = "unknown";

    updateAddresses();
    serverPort = 0;

    broadcastSocket.bind(QHostAddress::Any, broadcastPort, QUdpSocket::ShareAddress
                         | QUdpSocket::ReuseAddressHint);
    connect(&broadcastSocket, SIGNAL(readyRead()),
            this, SLOT(readBroadcastDatagram()));

    broadcastTimer.setInterval(BroadcastInterval);
    connect(&broadcastTimer, SIGNAL(timeout()),
            this, SLOT(sendBroadcastDatagram()));
}

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Member Function Documentation

void PeerManager::setServerPort

(

int

port

)

Definition at line 70 of file peermanager.cpp.

References serverPort.

Referenced by Client::Client().

{
    serverPort = port;
}

QByteArray PeerManager::userName

(

)

const

Definition at line 75 of file peermanager.cpp.

References username.

Referenced by Client::newConnection(), and Client::nickName().

{
    return username;
}

void PeerManager::startBroadcasting

(

)

Definition at line 80 of file peermanager.cpp.

References broadcastTimer, and QTimer::start().

Referenced by Client::Client().

{
    broadcastTimer.start();
}

bool PeerManager::isLocalHostAddress

(

const QHostAddress &

address

)

Definition at line 85 of file peermanager.cpp.

References ipAddresses.

Referenced by readBroadcastDatagram().

{
    foreach (QHostAddress localAddress, ipAddresses) {
        if (address == localAddress)
            return true;
    }
    return false;
}

void PeerManager::newConnection

(

Connection *

connection

)

[signal]

Referenced by readBroadcastDatagram().

void PeerManager::sendBroadcastDatagram

(

)

[private, slot]

Definition at line 94 of file peermanager.cpp.

References QByteArray::append(), broadcastAddresses, broadcastPort, broadcastSocket, QByteArray::number(), serverPort, updateAddresses(), username, and QUdpSocket::writeDatagram().

Referenced by PeerManager().

{
    QByteArray datagram(username);
    datagram.append('@');
    datagram.append(QByteArray::number(serverPort));

    bool validBroadcastAddresses = true;
    foreach (QHostAddress address, broadcastAddresses) {
        if (broadcastSocket.writeDatagram(datagram, address,
                                          broadcastPort) == -1)
            validBroadcastAddresses = false;
    }

    if (!validBroadcastAddresses)
        updateAddresses();
}

void PeerManager::readBroadcastDatagram

(

)

[private, slot]

Definition at line 111 of file peermanager.cpp.

References QList< T >::at(), broadcastSocket, client, connection, QByteArray::data(), emit, Client::hasConnection(), QUdpSocket::hasPendingDatagrams(), isLocalHostAddress(), newConnection(), QUdpSocket::pendingDatagramSize(), QUdpSocket::readDatagram(), QByteArray::resize(), serverPort, QByteArray::size(), QList< T >::size(), QByteArray::split(), and QByteArray::toInt().

Referenced by PeerManager().

{
    while (broadcastSocket.hasPendingDatagrams()) {
        QHostAddress senderIp;
        quint16 senderPort;
        QByteArray datagram;
        datagram.resize(broadcastSocket.pendingDatagramSize());
        if (broadcastSocket.readDatagram(datagram.data(), datagram.size(),
                                         &senderIp, &senderPort) == -1)
            continue;

        QList<QByteArray> list = datagram.split('@');
        if (list.size() != 2)
            continue;

        int senderServerPort = list.at(1).toInt();
        if (isLocalHostAddress(senderIp) && senderServerPort == serverPort)
            continue;

        if (!client->hasConnection(senderIp)) {
            Connection *connection = new Connection(this);
            emit newConnection(connection);
            connection->connectToHost(senderIp, senderServerPort);
        }
    }
}

void PeerManager::updateAddresses

(

)

[private]

Definition at line 138 of file peermanager.cpp.

References QNetworkInterface::addressEntries(), QNetworkInterface::allInterfaces(), QNetworkAddressEntry::broadcast(), broadcastAddresses, QList< T >::clear(), QNetworkAddressEntry::ip(), ipAddresses, and QHostAddress::Null.

Referenced by PeerManager(), and sendBroadcastDatagram().

{
    broadcastAddresses.clear();
    ipAddresses.clear();
    foreach (QNetworkInterface interface, QNetworkInterface::allInterfaces()) {
        foreach (QNetworkAddressEntry entry, interface.addressEntries()) {
            QHostAddress broadcastAddress = entry.broadcast();
            if (broadcastAddress != QHostAddress::Null) {
                broadcastAddresses << broadcastAddress;
                ipAddresses << entry.ip();
            }
        }
    }
}

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Member Data Documentation

Client* PeerManager::client [private]

Definition at line 58 of file peermanager.h.

Referenced by PeerManager(), and readBroadcastDatagram().

QList<QHostAddress> PeerManager::broadcastAddresses [private]

Definition at line 59 of file peermanager.h.

Referenced by sendBroadcastDatagram(), and updateAddresses().

QList<QHostAddress> PeerManager::ipAddresses [private]

Definition at line 60 of file peermanager.h.

Referenced by isLocalHostAddress(), and updateAddresses().

QUdpSocket PeerManager::broadcastSocket [private]

Definition at line 61 of file peermanager.h.

Referenced by PeerManager(), readBroadcastDatagram(), and sendBroadcastDatagram().

QTimer PeerManager::broadcastTimer [private]

Definition at line 62 of file peermanager.h.

Referenced by PeerManager(), and startBroadcasting().

QByteArray PeerManager::username [private]

Definition at line 63 of file peermanager.h.

Referenced by PeerManager(), sendBroadcastDatagram(), and userName().

int PeerManager::serverPort [private]

Definition at line 64 of file peermanager.h.

Referenced by PeerManager(), readBroadcastDatagram(), sendBroadcastDatagram(), and setServerPort().

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The documentation for this class was generated from the following files:

• examples/network/chat/peermanager.h
• examples/network/chat/peermanager.cpp

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