Server-> nextPendingConnection() need some help

[CuteKQ]

Hi all... I need some help with type casting or any thing which helps me to solve this problem.
I have a QTcpServer, and I connected the newConnection() signal of it to some slot. As you can see in the code below I used QTcpServer::nextPendingConnection() to get the new connection. but this method returns a QTcpSocket, And instead I need a QSslSocket for the rest of my program. Is it any possible way, for example like static_cast or ... to make the QTcpSocket to a QSslSocket ..!? I know that QSslSocket inherits QTcpSocket

@

void Server::manageQuery()
{
QTcpServer *myServer = qobject_cast<QTcpServer*>(sender());
QTcpSocket *socket = myServer->nextPendingConnection();
 
connect(socket,SIGNAL(readyRead()),this,SLOT(processQuery()));
connect(socket,SIGNAL(disconnected()),socket,SLOT(deleteLater()));
}

@

I mean some code like this

@
void Server::manageQuery()
{
QTcpServer myServer = qobject_cast<QTcpServer>(sender());
QTcpSocket *socket = (QSslSocket)myServer->nextPendingConnection();

connect(socket,SIGNAL(readyRead()),this,SLOT(processQuery()));
connect(socket,SIGNAL(disconnected()),socket,SLOT(deleteLater()));
}

@

can make the QTcpSocket to QSslSocket? or not ....

[issam]

The cast is like this :

@
QTcpSocket *socket = qobject_cast<QSslSocket *>myServer->nextPendingConnection();
@

See also : static_cast and dynamic_cast.

if the cast does not work you can use :

@
void QTcpServer::incomingConnection ( int socketDescriptor )
@

instead of QTcpServer::nextPendingConnection () !

[CuteKQ]

bq. The cast is like this :

QTcpSocket *socket = qobject_cast<QSslSocket *>myServer->nextPendingConnection();

See also : static_cast and dynamic_cast.

if the cast does not work you can use :bq.

none of them works.

bq. void QTcpServer::incomingConnection ( int socketDescriptor )

instead of QTcpServer::nextPendingConnection () ! bq.
I also know this but I need to use nextPendingConnection () !

[issam]

Hi. If the cast does not work, that means you should find another way to accept the connection instead of using nextPendingConnection() !

" helpful doc":http://dgraves.org/content/qt-notes-working-qsslsocket

[farslan]

I just needed the same functionally and come up with this solution. I didn't test it however the doc and lots of sources says that this is the way to provide SSl functionality to QTcpSocket.

Firs you have to reimplement the virtual function incomingConnection():

@/* This virtual function is normally called by QTcpServer when a new connection

• is available. The base implementation creates a QTcpSocket, sets the socket
• descriptor and then stores the QTcpSocket in an internal list of pending
• connections. Finally newConnection() is emitted.
• However we'll reimplement this virtual function to provide SSL
• functionality. /
  void Server::incomingConnection( int socketDescriptor )
  {
  QSslSocket socket = new QSslSocket(this);
  socket->setProtocol(QSsl::SslV2); // TODO: Or SslV3?
  // For now these files should be reside in the same folder as the application
  socket->setPrivateKey("server.key"); // $ openssl genrsa -out server.key 2048
  socket->setLocalCertificate("server.crt"); // $ openssl req -new -x509 -key server.key -out server.crt -days 1095

if (socket->setSocketDescriptor(socketDescriptor)) {
// pendingConnections is a QQueue<QSslSocket*>
this->pendingConnections.enqueue(socket);
// newConnection is emmited within QTcpServerPrivate. No need to emit it manually.
connect(socket, SIGNAL(encrypted()), this, SLOT(ready()));
socket->startServerEncryption(); // Initiate the SSL handshake
} else {
delete socket;
}
}@

As you see we are adding our newly created QSslSocket to the QQueue data type(create it before). Now we use this queue within the nextPendingConnection() function:

@/* Use our own list (QQueue pendingConnections) instead of QTcpServer's

• internal list. Needed for SSL functionality. /
  QTcpSocket Server::nextPendingConnection()
  {
  // Return the next connection in the queue. If there is none,
  // return 0.
  if (this->pendingConnections.isEmpty()) {
  return 0;
  } else {
  return this->pendingConnections.dequeue();
  }
  }@

Also the ready() slot is just for debugging or some other task. It's up to you. There lots of things still to do, however i think this is a good point to start.

[issam]

This is it farslan ! It seems to be working ;)