diff -r 000000000000 -r af10295192d8 linklayercontrol/nullagt/TS_nullagt/src/Nullagentloopbacktest.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/linklayercontrol/nullagt/TS_nullagt/src/Nullagentloopbacktest.cpp	Tue Jan 26 15:23:49 2010 +0200
@@ -0,0 +1,119 @@
+// Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// Contain the implementation of the class for this null agent test
+// 
+//
+
+#include "NullAgentTestSteps.h"
+#include "dummynifvar.h"
+#include "in_sock.h"
+
+CTestStepNullAgtLoopbackTest::CTestStepNullAgtLoopbackTest(TPtrC aName)
+{
+	iTestStepName=aName;
+}
+
+enum TVerdict CTestStepNullAgtLoopbackTest::doTestStepL(void)
+{
+	__UHEAP_MARK;
+
+	TInt r;                // the result of various operations
+	TRequestStatus status; // status of asynchronous ops
+
+	RSocketServ server;    // connection paraphanelia
+	RConnection connection;
+	RSocket socket;
+
+	TInetAddr dest;
+	dest.SetAddress(KDummyNifLocalAddressBase + 4);
+	dest.SetPort(KPortNo);
+
+	TBuf8<KBufferLength> buffer;
+
+	// connect to the socket server
+	r = server.Connect();
+	TESTEL(r == KErrNone, r);
+	CleanupClosePushL(server);
+	
+	// this is why we needed a socket server...
+	r = connection.Open(server, KAfInet);
+	TESTEL(r == KErrNone, r);
+	CleanupClosePushL(connection);
+	
+	// start the connection up (outgoing)
+	connection.Start(status);
+	User::WaitForRequest(status);
+	TESTEL(status.Int() == KErrNone, status.Int());
+	
+	// open a udp socket
+	r = socket.Open(server, KAfInet, KSockDatagram, KProtocolInetUdp);
+	TESTEL(r == KErrNone, r);
+	CleanupClosePushL(socket);
+	TESTL(socket.SetOpt(KSoReuseAddr, KSolInetIp, 1)==KErrNone);
+	// set the source port number - otherwise will panic cos it's zero
+	r = socket.SetLocalPort(KPortNo);
+	TESTEL(r == KErrNone, r);
+		
+	// build some data to send on the socket
+	// this is an ICMP ping request apparently
+	buffer.SetMax();
+	buffer.FillZ();
+	buffer[0] = (TUint8) 0x8;		// ICMP type = 8
+	buffer[1] = (TUint8) 0x0;		// ICMP code = 0
+	buffer[2] = (TUint8) 0xF7;		// ICMP checksum high byte
+	buffer[3] = (TUint8) 0xFF;		// ICMP checksum low byte
+	// NB the rest of the buffer is zero
+	// hence the checksum (0xFFFF - 0x800) since 0x8
+	// is the only non-zero element of the buffer
+
+	// send the data out over the socket
+	socket.SendTo(buffer, dest, 0, status);
+	User::WaitForRequest(status);
+	TESTEL(status.Int() == KErrNone, status.Int());
+	
+	buffer.Zero();
+	// I expect to get the data looped back from the dummy NIF
+	socket.RecvFrom(buffer, dest, 0, status);
+	User::WaitForRequest(status);
+	TESTEL(status.Int() == KErrNone, status.Int());
+	
+	// check that what we sent is what we got back
+	if (status.Int() == KErrNone)
+	{
+		// if the receive times out and we access buffer we get a panic
+		TEST(buffer[0] == 0x08);
+		TEST(buffer[1] == 0x00);
+		TEST(buffer[2] == 0xF7);
+		TEST(buffer[3] == 0xFF);
+	}
+	
+	// close the socket
+	socket.Shutdown(RSocket::ENormal, status);
+	User::WaitForRequest(status);
+	TESTEL(status.Int() == KErrNone, status.Int());
+	CleanupStack::Pop();
+
+	// force the destruction of the connection
+	r = connection.Stop();
+	TESTEL(r == KErrNone, r);
+	CleanupStack::Pop();
+
+	// close the socket server
+	server.Close();
+	CleanupStack::Pop();
+
+	__UHEAP_MARKEND;
+
+	return iTestStepResult;
+}