void DuktoProtocol::handleMessage(QByteArray &data, QHostAddress &sender)
{
char msgtype = data.at(0);
switch(msgtype)
{
case MSG_HELLO_BROADCAST:
case MSG_HELLO_UNICAST:
data.remove(0, 1);
if (data != getSystemSignature()) {
mPeers[sender.toString()] = Peer(sender, QString::fromUtf8(data), DEFAULT_UDP_PORT);
if (msgtype == MSG_HELLO_BROADCAST) sayHello(sender, DEFAULT_UDP_PORT);
emit peerListAdded(mPeers[sender.toString()]);
}
break;
case MSG_GOODBYE:
emit peerListRemoved(mPeers[sender.toString()]);
mPeers.remove(sender.toString());
break;
case MSG_HELLO_PORT_BROADCAST:
case MSG_HELLO_PORT_UNICAST:
data.remove(0, 1);
qint16 port = *((qint16*) data.constData());
data.remove(0, 2);
if (data != getSystemSignature()) {
mPeers[sender.toString()] = Peer(sender, QString::fromUtf8(data), port);
if (msgtype == MSG_HELLO_PORT_BROADCAST) sayHello(sender, port);
emit peerListAdded(mPeers[sender.toString()]);
}
break;
}
}
void DuktoProtocol::handleMessage(QByteArray &data, QHostAddress &sender)
{
char msgtype = data.at(0);
switch(msgtype)
{
case 0x01: // HELLO (broadcast)
case 0x02: // HELLO (unicast)
data.remove(0, 1);
if (data != getSystemSignature()) {
mPeers[sender.toString()] = Peer(sender, QString::fromUtf8(data), DEFAULT_UDP_PORT);
if (msgtype == 0x01) sayHello(sender, DEFAULT_UDP_PORT);
emit peerListAdded(mPeers[sender.toString()]);
}
break;
case 0x03: // GOODBYE
emit peerListRemoved(mPeers[sender.toString()]);
mPeers.remove(sender.toString());
break;
case 0x04: // HELLO (broadcast) with PORT
case 0x05: // HELLO (unicast) with PORT
data.remove(0, 1);
qint16 port = *((qint16*) data.constData());
data.remove(0, 2);
if (data != getSystemSignature()) {
mPeers[sender.toString()] = Peer(sender, QString::fromUtf8(data), port);
if (msgtype == 0x04) sayHello(sender, port);
emit peerListAdded(mPeers[sender.toString()]);
}
break;
}
}
void DuktoProtocol::sayHello(QHostAddress dest, qint16 port)
{
// Preparazione pacchetto
QByteArray packet;
if ((port == DEFAULT_UDP_PORT) && (mLocalUdpPort == DEFAULT_UDP_PORT))
{
if (dest == QHostAddress::Broadcast)
packet.append(MSG_HELLO_BROADCAST);
else
packet.append(MSG_HELLO_UNICAST);
}
else
{
if (dest == QHostAddress::Broadcast)
packet.append(MSG_HELLO_PORT_BROADCAST);
else
packet.append(MSG_HELLO_PORT_BROADCAST);
packet.append((char*)&mLocalUdpPort, sizeof(qint16));
}
packet.append(getSystemSignature());
// Invio pacchetto
if (dest == QHostAddress::Broadcast) {
QList<qint16> ports;
ports.append(DEFAULT_UDP_PORT);
if (port != DEFAULT_UDP_PORT)
ports.append(port);
sendToAllBroadcast(packet, ports);
}
else
mSocket->writeDatagram(packet.data(), packet.length(), dest, port);
}
void DuktoProtocol::sayHello(QHostAddress dest, qint16 port)
{
// Preparazione pacchetto
QByteArray *packet = new QByteArray();
if ((port == DEFAULT_UDP_PORT) && (mLocalUdpPort == DEFAULT_UDP_PORT))
{
if (dest == QHostAddress::Broadcast)
packet->append(0x01); // 0x01 -> HELLO MESSAGE (broadcast)
else
packet->append(0x02); // 0x02 -> HELLO MESSAGE (unicast)
}
else
{
if (dest == QHostAddress::Broadcast)
packet->append(0x04); // 0x04 -> HELLO MESSAGE (broadcast) with PORT
else
packet->append(0x05); // 0x05 -> HELLO MESSAGE (unicast) with PORT
packet->append((char*)&mLocalUdpPort, sizeof(qint16));
}
packet->append(getSystemSignature());
// Invio pacchetto
if (dest == QHostAddress::Broadcast) {
sendToAllBroadcast(packet, port);
if (port != DEFAULT_UDP_PORT) sendToAllBroadcast(packet, DEFAULT_UDP_PORT);
}
else
mSocket->writeDatagram(packet->data(), packet->length(), dest, port);
delete packet;
}
