diff -r abbed5a4b42a -r 8d540f55e491 esockapiextensions/internetsockets/inc/in_sock.h
--- a/esockapiextensions/internetsockets/inc/in_sock.h	Tue Aug 31 16:45:15 2010 +0300
+++ b/esockapiextensions/internetsockets/inc/in_sock.h	Wed Sep 01 12:33:58 2010 +0100
@@ -32,6 +32,71 @@
 #include <in_sock_internal.h>
 #endif
 
+// Constants and typedef's for domain suffix support on interface
+const TInt KMaxDomainSuffixLength = 254; // Leaving space for minimum 1 letter hostname + '.' on maximum hostname length
+const TInt KMaxHostNameLength = 256;
+typedef TBuf<KMaxDomainSuffixLength> TSuffixName;
+typedef RArray<TSuffixName> RInetSuffixList;
+
+// Enumeration on type of operation done on the interface
+// for the domain suffix using RSocket::SetOpt
+enum TSoInetDomainSuffixFunction
+	{
+	EInetFunctionUndefined,
+	EInetAddSuffix,
+	EInetDeleteSuffix,
+	EInetDeleteAllSuffixes
+	};
+
+/**
+* Interface domain name structure
+* Used in TSoInetInterfaceInfoExtnDnsSuffix for adding/removing
+* Domain name suffices to an active interface using  RSocket::SetOpt
+*
+* @publishedAll
+* @released
+*/
+class TInetSuffix
+{
+private:
+	inline TInt AssignValue(const TDesC& aValue)
+		{
+        if (aValue.Length() > KMaxDomainSuffixLength)
+        	return KErrTooBig;
+		iSuffixName.Copy(aValue);
+		return KErrNone;
+		}
+
+public:
+	TInetSuffix() { iDomainSuffixFunction = EInetFunctionUndefined; }
+	
+	inline TInt Copy(const TDesC& aValue)
+		{
+		TInt err = AssignValue(aValue);
+       	if (err == KErrNone)
+       		iDomainSuffixFunction = EInetAddSuffix;
+       	return err;
+		}
+
+	inline TInt Delete(const TDesC& aValue)
+		{
+		TInt err = AssignValue(aValue);
+       	if (err == KErrNone)
+       		iDomainSuffixFunction = EInetDeleteSuffix;
+       	return err;
+		}
+		
+	inline void DeleteAll()
+		{
+		iDomainSuffixFunction = EInetDeleteAllSuffixes;
+		}
+		
+public:
+	TSuffixName iSuffixName;
+	TUint8 iDomainSuffixFunction;
+
+};
+
 /**
 * @name TCP/IP Protocol and address family
 *
@@ -739,6 +804,42 @@
 const TUint KSoInetStartInterface = 0x217;
 
 /**
+* @name Interface control socket options
+*
+* Level: #KSolInetIfCtrl
+*
+* Enumerating & Configuring Domain suffix on an using TSoInetInterfaceInfoExtnDnsSuffix
+*/ 
+//@{
+/**
+* Begin enumeration of domain suffixes on an enumerated interface. 
+* 
+* This option should be set before enumerating domain suffices with #KSoInetNextDomainSuffix.
+* As a pre-condition, the enumeration should be initiated on an active enumeration of interface
+* 
+* This option is for use with RSocket::SetOpt() only.
+*/
+const TUint KSoInetEnumDomainSuffix = 0x218;
+
+/**
+* Return details of the next domain suffix in an enumeration started by setting the 
+* option #KSoInetEnumDomainSuffix.
+*
+* This option is for use with RSocket::GetOpt() only.
+* 
+* Option data type is TSoInetInterfaceInfoExtnDnsSuffix.
+*
+* @note
+*	If the interface has multiple domain suffices, then each domain name
+*	is returned as a separate instance of TSoInetInterfaceInfoExtnDnsSuffix
+*	(only domain suffix name is different each time).
+* @note
+*	If the interface has no domain suffix, then SetOpt call
+*	returns with error KErrNotFound
+*/
+const TUint KSoInetNextDomainSuffix = 0x219;
+
+/**
 * Trigger link local creation.
 *
 * Option data type is TSoInet6InterfaceInfo.
@@ -1058,7 +1159,27 @@
 	*/
 	TUint iDoProxy:1;
 	};
-//@}
+
+/**
+* Extension class for TSoInet6InterfaceInfo. Available in Symbian OS vtb92 and later.
+*
+* Optionally used with the following interface level #KSolInetIfCtrl options:
+* @li	#KSoInetConfigInterface
+* @li	#KSoInetChangeInterface
+* @li	#KSoInetEnumInterface
+*
+* Provides specialised fields for the interface object that generally
+* supplement extended behaviors for certain applications
+*
+* @publishedAll
+* @released
+*/
+class TSoInetInterfaceInfoExtnDnsSuffix : public TSoInet6InterfaceInfo
+    {
+public:
+    /** Interface domain suffix (if any). Used by DND for name resolution */
+    TInetSuffix iDomainSuffix;
+    };
 
 /**
 * @name Interface query socket options
@@ -1171,6 +1292,12 @@
 	*/
 	TInetScopeIds iZone;
 	};
+
+/*class TSoInetSupplIfQuery : public TSoInetIfQuery
+    {
+    TInetSuffixList iSuffixList;
+    };*/
+
 /**
 * Get information for the interface specified by the destination address (iDstAddr) 
 * field of the passed packaged TSoInetIfQuery.
@@ -1839,6 +1966,17 @@
 * @since 7.0s
 */
 const TUint KSoNoSourceAddressSelect = 0x40b;
+
+/**
+ * Store the port number on which application to the Hook listens to.
+ * 
+ * This port number will be used to be set as the destination address which
+ * performing the UDP encapsulation from tunnel nif application to third party application.
+ * The same port number if used to identify the packets orignated from the application towards
+ * the Tunnel Nif.
+ */
+const TUint KSoTunnelPort = 0x40c;
+
 /**
 * Retrieve last error information.
 *