--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tcpiputils/dnd/include/llmnrconflict.h Tue Jan 26 15:23:49 2010 +0200
@@ -0,0 +1,96 @@
+// Copyright (c) 2005-2009 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:
+// llmnrconflict.h - Interface definitions LLMNR name conflict notification
+// Interface definitions for the LLMNR name conflict notification
+//
+
+
+
+/**
+ @file llmnrconflict.h
+ @publishedPartner
+ @released
+*/
+
+#ifndef __LLMNRCONFLICT_H__
+#define __LLMNRCONFLICT_H__
+
+#include <es_sock.h>
+
+/**
+* The notification UID
+*/
+TInt KLlmnrConflictNotifyUid = 0x101F6D23;
+
+class TLlmnrConflictName
+ {
+public:
+ inline TBool IsSafe() const;
+ THostName iName; //< The host name.
+ };
+
+class TLlmnrConflictNotify : public TLlmnrConflictName
+ /**
+ * Conflict notification message format.
+ *
+ * The base iName contains the link local name which is conflict
+ * with some other host on some interface assotiated with the
+ * indicated IAP (iIAPId).
+ */
+ {
+public:
+
+ TUint32 iIAPId; //< ID of selected IAP
+ TUint32 iNetworkId; //< ID of Network to which IAP belongs
+ };
+
+/**
+* The reply from notifier only has the replacement host name.
+*
+* The the nofitier completes with KErrNone, the reply message can contain
+* a the new name. If this new name is also colliding with someone, another
+* notify is issued.
+*
+* If the notifier does not want LLMNR to try an alternate name, it should
+* either complete with some error (KErrCancel for example), or KErrNone
+* with empty replacement name (iName.Length() == 0).
+*/
+typedef TLlmnrConflictName TLlmnrConflictReply;
+
+
+TBool TLlmnrConflictName::IsSafe() const
+ /**
+ * Test if iName really is a TBuf derived descriptor.
+ */
+ {
+ // This test is defined, because this structure is passed as a parameter,
+ // and any sender of the message can crash the receiver by placing tailored "garbage"
+ // on TBuf descriptor. The receiver has no official way of validating that TBuf
+ // descriptor is correct, and the garbage can be such that any reference to the
+ // content of TBuf will cause panic (for example place into iTypeLength field a
+ // value that implies TPtr and NULL into actual buffer address).
+ //
+ // This method gives some (but not 100%) confidence that accessing the iName
+ // does not cause a panic. This test works on assumtion that first TInt of
+ // the descriptor holds "type length" information, and that type of a TBuf is
+ // 0.
+ //
+ // Something like this sbould be provided by the descriptor class itself!
+ //
+ return ((iName.Length() | 0x30000000) == (TInt &)iName && // ... is really a TBuf?
+ iName.Length() <= iName.MaxLength() && // ... length & maxlength seem reasonable
+ iName.MaxSize() >= (sizeof(THostName) - 2*sizeof(TInt)));
+ }
+
+#endif