Simple TCP model (INET)

[Daniel Burnier]

Hello,

I am new to the OMNET++/INET environment and I am trying to get used ot it by running some examples ( I use windows 7 and the latest INET and OMNET++ versions)

The example I am working with now is a simple connection between a server and a client through a DataRateChannel

When I run a simulation I get following and it stops after 52 events. Can anyone please explain me why the simulation stops and does not send further packets?

WindowSize.client.tcpApp[0]: opened 1 sessions

WindowSize.client.tcpApp[0]: sent 350 bytes in 1 packets

WindowSize.client.tcpApp[0]: received 0 bytes in 0 packets

WindowSize.client.tcp: finishing with 1 connections open.

WindowSize.server.tcp: finishing with 2 connections open.

My INI file looks like this:

[General]

network = WindowSize

**.tcpType = "TCP"

**.tcp.advertisedWindow = 65535

**.client.numTcpApps = 1

**.client.tcpApp[*].typename = "TCPBasicClientApp"

**.client.tcpApp[*].connectAddress = "server" 

**.client.tcpApp[*].thinkTime = 1s

**.client.tcpApp[*].idleInterval = 3s

**.client.tcpApp[*].requestLength = 350B

**.client.tcpApp[*].numRequestsPerSession = 1

**.client.tcpApp[*].connectPort = 80

**.client.tcpApp[*].dataTransferMode = "object"

**.server.numTcpApps = 1

**.server.tcpApp[*].typename = "TCPSrvHostApp"

**.server.tcpApp[*].serverThreadClass = "TCPGenericSrvThread"

**.server.tcpApp[*].localPort = 80

**.server.tcpApp[*].dataTransferMode = "object"

**.client.ppp[*].queueType = "DropTailQueue"

**.client.ppp[*].queue.frameCapacity = 50

**.server.ppp[*].queueType = "DropTailQueue"

**.server.ppp[*].queue.frameCapacity = 50

**.ppp[*].numOutputHooks = 1

**.ppp[*].outputHook[*].typename = "OrdinalBasedDropper"

And my NED file like this:

package windowsize.simulations;

import inet.linklayer.ethernet.EtherHub;

import inet.networklayer.autorouting.ipv4.FlatNetworkConfigurator;

import inet.networklayer.extras.FailureManager;

import inet.nodes.inet.StandardHost;

import ned.DatarateChannel;

//

// TODO auto-generated type

//

network WindowSize

{

    @display("bgb=639,481");

    submodules:

        client: StandardHost {

            @display("p=176,220");

        }

        server: StandardHost {

            @display("p=421,220;i=device/server");

        }

        flatNetworkConfigurator: FlatNetworkConfigurator {

            @display("p=319,81");

        }

    connections:

        client.pppg++ <--> DatarateChannel {  delay = 0.02s; datarate = 56000bps; } <--> server.pppg++;

}

thank you very much

regards

Daniel B.