This example demonstrates the use of the RConnection API to do connection monitoring and management.
The example demonstrates the following features of the RConnection API:
Opening and closing a connection using RConnection::Open(RSocketServ& aSocketServer, TUint aConnectionType = KConnectionTypeDefault) and RConnection::Close() .
Starting a connection that uses the default CommDb connection preferences, and another connection that overrides them, using (respectively) RConnection::Start() and RConnection::Start(TConnPref& aPref) .
Getting the number of connections, and retrieving information about one of them, using RConnection::EnumerateConnections(TUint& aCount) and RConnection::GetConnectionInfo(TUint aIndex, TDes8& aConnectionInfo) .
Attaching a connection to an existing interface, using RConnection::Attach(const TDesC8& aConnectionInfo, TConnAttachType aAttachType) .
Registering for notifications when:
a certain amount of data has been sent, using RConnection::DataSentNotificationRequest(TUint aThreshold, TPckg<TUint>& aUplinkVolume, TRequestStatus& aStatus) .
a certain amout of data has been received, using RConnection::DataReceivedNotificationRequest(TUint aThreshold, TPckg<TUint>& aDownlinkVolume, TRequestStatus& aStatus) .
interfaces go up and down, using RConnection::AllInterfaceNotification(TDes8& aNotification, TRequestStatus& aStatus) .
the connection changes state, using RConnection::ProgressNotification(TNifProgressBuf& aProgress, TRequestStatus& aStatus, TUint aSelectedProgress = KConnProgressDefault) .
Obtaining the amount of data transferred, using RConnection::DataTransferredRequest() .
Obtaining the connection's current state, using RConnection::Progress(TNifProgress& aProgress) .
Stopping the connection, using RConnection::Stop() .
Closing the session with the socket server using RSocketServ::Close() .
Click on the following link to download the example: Rconnection.zip
Click: browse to view the example code.
The example demonstrates the following classes:
The project implements a single class called CRConnection , that has three principal functions:
This shows how to use RConnection to:
start a connection and associate it with an underlying interface, using default CommDb connection preferences,
get notification when the underlying interface goes up or down,
get notification about the state of a connection as it becomes fully established,
transfer data over a socket,
get the amount of data transferred,
close the connection.
It also shows how to set up a socket to carry out data transfer.
This is the same as DemoApiWithoutDbOverrideL() except that it:
starts a connection using non-default CommDb connection preferences,
requests notification when a threshold amount of data has been transferred (instead of getting the amount of data transferred).
This shows how to use RConnection to:
You can build the example from the IDE or the command line.
If you use an IDE, import the bld.inf file into your IDE, and use the build command of the IDE.
If you use the command line, open a command prompt, and set the current directory to the source code directory of the example. You can then build the example using the SBSv1 build tools with the following commands:
Before running the example, the emulator must be set up to use ethernet, as follows:
Install WinPCap 4.0.2
Configure the emulator using configchange.pl for instance:
configchange.pl --config ethernetWithCommDB --kernel EKA2 --target winscw --variant udeb
Open ethernetced.xml in epoc32\winscw\c\ and change the last 3 values in the LANBearer operation section for "EKA2 Emulator Ethernet" in the LANBearerTable to:
i.e. change the three values from -1 to 10.
Save the file and then run ced c:\ethernetced.xml from the eshell command prompt in the emulator.
Download a UDP Echoserver. An Echoserver is easily available on the internet.
Start the UDP Echoserver and edit the rconnection.cpp file in the example code so that the values for KDestAddr and KSockPort match the values being used by the UDP Echoserver.
Build the application using the commands described above and then run it.
For the emulator, the example builds an executable called rconnection.exe in the epoc32\release\winscw\<udeb or urel>\ folder.
rconnection.exe is a console-based application. The example takes input from the user and prints to the console information about the various stages of the example.
Copyright ©2010 Nokia Corporation and/or its subsidiary(-ies).
All rights reserved. Unless otherwise stated, these materials are provided under the terms of the Eclipse Public License v1.0.