[Solved] Can't get peer Adress from QTcpSocket

buggi

Hello,
I recently started programming with Qt and am now working on a asynchronous QTcpServer. Now what I am trying to do is create a new File for every unique client that connects to my Server with this Code:

@socket = new QTcpSocket(this);

socket->setSocketDescriptor(handle); 

qDebug()<<socket->localAddress().toIPv4Address();
qDebug()<<socket->localPort();
MyClient::FileName = MainWindow::FileName.append("/").append(socket->localAddress().toIPv4Address()).append(".txt");
qDebug()<<MyClient::FileName;

connect(socket, SIGNAL(connected()), this, SLOT(connected()));
connect(socket, SIGNAL(disconnected()), this, SLOT(disconnected()));
connect(socket, SIGNAL(readyRead()), this, SLOT(readyRead()));

qDebug()<<"Client connected";@

But the Filename is either empty or I get "3232243626" as output from "qDebug()<<socket->localAddress().toIPv4Address();" what leads into having a File with the name "ᾪ".
I hope somebody can tell me what I am doing wrong.
Thanks in advance.

beemaster

Probably you should use "QTcpServer":http://qt-project.org/doc/qt-4.8/qtcpserver.html to listen incoming connections and then obtain socket descriptor via "nextPendingConnection":http://qt-project.org/doc/qt-4.8/qtcpserver.html#nextPendingConnection
Have a look at "Fortune Server Example":http://qt-project.org/doc/qt-4.8/network-fortuneserver.html

buggi

Ok I dont really know what you mean but I think I am already doing that. I will better post my complete Code:
Server.cpp:
@void MyServer::StartServer ()
{
if(listen(QHostAddress::Any, 45454))
{
qDebug()<<"Server is listening";
}
else
{
qDebug()<<"Server failed to start!";
}
}

void MyServer::incomingConnection (qintptr handle)
{
client = new MyClient(this);
client->CreatSocket(handle);
}@
Client.cpp:
@void MyClient::CreatSocket(qintptr handle)
{
socket = new QTcpSocket(this);

socket->setSocketDescriptor(handle); 

qDebug()<<socket->localAddress().toIPv4Address();
qDebug()<<socket->localPort();
MyClient::FileName = MainWindow::FileName.append("/").append(socket->localAddress().toIPv4Address()).append(".txt");
qDebug()<<MyClient::FileName;

connect(socket, SIGNAL(connected()), this, SLOT(connected()));
connect(socket, SIGNAL(disconnected()), this, SLOT(disconnected()));
connect(socket, SIGNAL(readyRead()), this, SLOT(readyRead()));

qDebug()<<"Client connected";

}@
The Server logic runs fine: I can connect, I can exchange data etc. the only thing that blows my mind is, why I cant get the correct Ip of the connected socket.
PS: Thank you for your fast response.

beemaster

OK, I see, you mix bsd socket API with Qt API. A bit offtopic, but I suggest you to start using "QTcpServer::listen":http://qt-project.org/doc/qt-4.8/qtcpserver.html#listen instead of just calling listen() next time.

If I understand, you want to obtain remote peer address. Have you tried calling "peerAddress":http://qt-project.org/doc/qt-4.8/qabstractsocket.html#peerAddress and "peerPort":http://qt-project.org/doc/qt-4.8/qabstractsocket.html#peerPort ?

buggi

Hey beemaster, thank you for helping me!
So I changed "if(listen(QHostAddress::Any, 45454))" to "if(this->listen(QHostAddress::Any, 45454))". Is that better?

So I used peerAddress and peerPort instead and my output actually changed. I get "3232243573" for peerAddress now what leads into having a file named "ή". By the way, I discovered that if I connect from localhost the peerAddress is empty and if I connect from any maschine to the server they all get the same number as peer address. I dont know if this matters but the server is runnng on opensuse 13.1 and the clients I tested with are Windows 7 maschines.

beemaster

When you call
@
socket->peerAddress().toIPv4Address();
@

you get a 4 byte integer. If you want IP address in form of string you should call
@
socket->peerAddress().toString();
@

buggi

Yeah!! :) Thank you, that did the Trick. I didn't use this because when I tested by connecting from localhost I got the Ipv6 Address back, but with an other host the String is what I expected it to be.