--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/natfw/natfwconnectionmultiplexer/src/cncmicmpv6receiver.cpp	Tue Feb 02 01:04:58 2010 +0200
@@ -0,0 +1,215 @@
+/*
+* Copyright (c) 2007-2008 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:   
+*
+*/
+
+
+
+
+#include <ip6_hdr.h>
+#include <icmp6_hdr.h>
+#include <udp_hdr.h>
+#include <ext_hdr.h>
+#include <in_sock.h>
+#include "ncmconnectionmultiplexerlogs.h"
+#include "cncmicmpv6receiver.h"
+#include "mncmicmpobserver.h"
+#include "cncmicmpsender.h"
+
+// -----------------------------------------------------------------------------
+// CNcmIcmpV6Receiver::NewL
+// -----------------------------------------------------------------------------
+//
+CNcmIcmpV6Receiver* CNcmIcmpV6Receiver::NewL( RSocketServ& aServer,
+    RConnection& aConnection, MNcmIcmpObserver& aObserver )
+    {
+    CNcmIcmpV6Receiver* self =
+        new ( ELeave ) CNcmIcmpV6Receiver( aServer, aConnection, aObserver );
+            
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    CleanupStack::Pop( self );
+    return self;
+    }
+
+
+// -----------------------------------------------------------------------------
+// CNcmIcmpV6Receiver::CNcmIcmpV6Receiver
+// -----------------------------------------------------------------------------
+//
+CNcmIcmpV6Receiver::CNcmIcmpV6Receiver( RSocketServ& aServer,
+    RConnection& aConnection, MNcmIcmpObserver& aObserver ) :
+    CActive( CActive::EPriorityStandard ),
+    iServer( aServer ),
+    iConnection( aConnection ),
+    iObserver( aObserver )
+    {
+    CActiveScheduler::Add( this );
+    }
+
+
+// -----------------------------------------------------------------------------
+// CNcmIcmpV6Receiver::ConstructL
+// -----------------------------------------------------------------------------
+//
+void CNcmIcmpV6Receiver::ConstructL()
+    {
+    User::LeaveIfError( iSocket.Open(
+        iServer, KAfInet, KSockDatagram, KProtocolInet6Icmp, iConnection ) );
+        
+    iIcmpSender = CNcmIcmpSender::NewL( iSocket );
+
+    Receive();
+    }
+
+
+// -----------------------------------------------------------------------------
+// CNcmIcmpV6Receiver::~CNcmIcmpV6Receiver
+// -----------------------------------------------------------------------------
+//
+CNcmIcmpV6Receiver::~CNcmIcmpV6Receiver()
+    {
+    Cancel();
+    
+    delete iIcmpSender;
+    iSocket.Close();
+    }
+
+
+// -----------------------------------------------------------------------------
+// CNcmIcmpV6Receiver::RunL
+// -----------------------------------------------------------------------------
+//
+void CNcmIcmpV6Receiver::RunL()
+    {
+    if ( iStatus == KErrNone )
+        {
+        CheckError();
+        Receive();
+        }
+    }
+
+
+// -----------------------------------------------------------------------------
+// CNcmIcmpV6Receiver::CheckError
+// -----------------------------------------------------------------------------
+//
+void CNcmIcmpV6Receiver::CheckError()
+    {
+    const TUint KDestinationUnreachable = 1;
+
+    // Pointer to ICMP header
+    TInet6HeaderICMP* icmpPtr( ( TInet6HeaderICMP* ) iData.Ptr() );
+
+    // Pointer to IPv6 header
+    const TInt KIPHeaderOffset = 8;
+    TInet6HeaderIP* ipv6Ptr =
+        ( TInet6HeaderIP* )( iData.Ptr() + KIPHeaderOffset );
+
+    // Get the whole length of the header in bytes
+    TUint32 payloadLength( ipv6Ptr->PayloadLength() );
+    TUint32 offset( 0 );
+
+    // Pointer to IPv6 extension header
+    const TInt KHeaderExtensionOffset = 14;
+    TInet6HeaderExtension* extPtr =
+        ( TInet6HeaderExtension* )( iData.Ptr() + KHeaderExtensionOffset );
+    // Get the extension header length in bytes
+    TUint32 extHdrLength( extPtr->HeaderLength() );
+
+    // Pointer to UDP data
+    TInet6HeaderUDP* udpPtr = ( TInet6HeaderUDP* )( ipv6Ptr->EndPtr() );
+
+    // Error message type
+    TUint32 error( icmpPtr->Type() );
+    if ( KDestinationUnreachable == error )
+        {
+        TUint32 nextHeader( 0 );
+        do  // Search the correct header, if there are extension headers
+            {
+            nextHeader = extPtr->NextHeader();
+            if( KProtocolInetUdp == nextHeader )
+                {
+                // Get the destination port number
+                iAddress.SetPort( udpPtr->DstPort() );
+
+                // Set the destination address
+                iAddress.SetAddress( ipv6Ptr->DstAddr() );
+
+                __CONNECTIONMULTIPLEXER_INT1(
+                    "CNcmIcmpV6Receiver::CheckError - ICMP error:", error )
+                __CONNECTIONMULTIPLEXER_ADDRLOG(
+                    " CNcmIcmpV6Receiver::CheckError - DstAddr:", iAddress )
+
+                TInetAddr localAddress;
+                TInetAddr remoteAddress;
+                iObserver.IcmpError( iAddress, localAddress, remoteAddress );
+                            
+                if ( !( remoteAddress.IsUnspecified() ||
+                    localAddress.IsUnspecified() ) )
+                    {
+                    udpPtr->SetDstPort( localAddress.Port() );
+                    udpPtr->SetSrcPort( remoteAddress.Port() );
+                     
+                    TInetAddr local( localAddress.Address() );
+                    local.ConvertToV4Mapped();
+                    ipv6Ptr->SetDstAddr( local.Ip6Address() );
+                                                        
+                    TInetAddr remote( remoteAddress.Address() );
+                    local.ConvertToV4Mapped();
+                    ipv6Ptr->SetSrcAddr( remote.Ip6Address() );
+                    
+                    iIcmpSender->Send( iData, remoteAddress );
+                    }
+                }
+            else
+                {
+                // Step to next header
+                if ( offset < payloadLength )
+                    {
+                    extPtr = extPtr + extHdrLength;
+                    offset = offset + extHdrLength;
+                    }
+                }
+            // Loop until UDP datagram is found. If it is not found,
+            // get out of here and do nothing.
+            } while ( ( KProtocolInetUdp != nextHeader ) &&
+                      ( offset < payloadLength ) );
+        }
+    }
+
+
+// -----------------------------------------------------------------------------
+// CNcmIcmpV6Receiver::DoCancel
+// -----------------------------------------------------------------------------
+//
+void CNcmIcmpV6Receiver::DoCancel()
+    {
+    iSocket.CancelRecv();
+    }
+
+
+// -----------------------------------------------------------------------------
+// CNcmIcmpV6Receiver::Receive
+// -----------------------------------------------------------------------------
+//
+void CNcmIcmpV6Receiver::Receive()
+    {
+    if ( !IsActive() )
+        {
+        iSocket.Recv( iData, 0, iStatus );
+        SetActive();
+        }
+    }