QTcpSocket问题

ChatClient::ChatClient(QObject *parent)
    : QObject(parent) {
    tcpSocket = new QTcpSocket(this);
    QNetworkConfigurationManager manager;
    if (QNetworkConfigurationManager::NetworkSessionRequired
        & manager.capabilities()) {
        qDebug() << \"Network session required\";
    }
    connect(tcpSocket, SIGNAL(error(QAbstractSocket::SocketError)),
            this, SLOT(error(QAbstractSocket::SocketError)));
    connect(tcpSocket, SIGNAL(connected()),
            this, SLOT(requestForID()));
    connect(tcpSocket, SIGNAL(readyRead()),
            this, SLOT(receiveMessage()));
    tcpSocket->connectToHost(\"192.168.0.100\", PORT);
}

void ChatClient::requestForID() {
    qDebug() << \"Connected, requesting for ID\";
    QByteArray segment;
    QDataStream out(&segment, QIODevice::WriteOnly);
    out.setVersion(QDataStream::Qt_4_7);
    out << (quint16)0 << ID;
    out.device()->seek(0);
    out << (quint16)(segment.size() - sizeof(quint16));
    tcpSocket->write(segment);
}

ChatServer::ChatServer(QObject *parent)
    : QObject(parent) {
    tcpServer = new QTcpServer(this);
    if (!tcpServer->listen(QHostAddress::Any, PORT)) {
        qDebug() << \"Unable to start the server\"
                 << tcpServer->errorString();
    }
    qDebug() << \"Server port\" << tcpServer->serverPort();
    connect(tcpServer, SIGNAL(newConnection()),
            this, SLOT(processConnection()));
}
void ChatServer::processConnection() {
    qDebug() << \"Incoming connection\";
    QTcpSocket *clientSocket = tcpServer->nextPendingConnection();
    /*connect(clientSocket, SIGNAL(readyRead()),
            this, SLOT(readData()));
    readData(clientSocket);
    connect(clientSocket, SIGNAL(disconnected()),
            clientSocket, SLOT(deleteLater()));*/
    QByteArray segment;
    QDataStream out(&segment, QIODevice::WriteOnly);
    out.setVersion(QDataStream::Qt_4_7);
    out << (quint16)0 << (quint16)Message
        << \"Successfully connected\";
    out.device()->seek(0);
    out << (quint16)(segment.size() - sizeof(quint16));
    clientSocket->write(segment);
    clientSocket->disconnectFromHost();
}