author | William Roberts <williamr@symbian.org> |
Wed, 10 Nov 2010 13:36:07 +0000 | |
branch | RCL_3 |
changeset 79 | 4b172931a477 |
parent 0 | af10295192d8 |
permissions | -rw-r--r-- |
0
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// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// NAPT (Network Address & Port translation Code ) |
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// |
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// |
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/** |
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@file |
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@internalComponent |
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@prototype |
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*/ |
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#ifndef __TRANSLATIONTABLE_H |
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#define __TRANSLATIONTABLE_H |
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#include <e32std.h> |
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#include <e32base.h> |
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#include <es_sock.h> // for BigEndian |
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#include <icmp6_hdr.h> |
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#include <ip4_hdr.h> |
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#include <tcp_hdr.h> |
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#include <in_pkt.h> |
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#include <ext_hdr.h> |
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#include <in_chk.h> |
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#include "naptconfigtable.h" |
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//Hash Table Array Size |
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const TUint16 KTranslationHashTableSize= 111; |
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//flags for TCP session close |
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const TUint8 KTcpClosePacketOUT =0x40 ; |
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const TUint8 KTcpClosePacketIN =0x80 ; |
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const TUint8 KTcpCloseDeletePacket = KTcpClosePacketOUT | KTcpClosePacketIN | KTcpCtlACK ; |
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//TImer Default Values.. All values in Seconds.. |
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const TUint32 KTimerMaxSeconds =2147 ; //Maximum Timer Interval |
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const TUint32 KTableScanIntervalDefault =3*60 ; //3 minutes |
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//Inactive Protcol Timeout Default Values |
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const TUint32 KTcpIdleTimeOutDefault =24*60*60; //One day |
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const TUint32 KUdpIdleTimeoutDefault =3*60; //3 minutes |
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const TUint32 KIcmpIdleTimeoutDefault =3*60; //3 minutes |
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//Tcp Close Wait Time for Napt Table Node Deletion |
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const TUint32 KTcpOpenTimeoutDefault =30 ; // 30 seconds |
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const TUint32 KTcpCloseTimeoutDefault =4*60; // 4 minutes |
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//Napt Port Range |
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const TUint16 KNaptPort_HIGH =64000; |
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const TUint16 KNaptPort_LOW =61000; |
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//IcmpQueryIdRange |
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const TUint16 KNaptIcmpQuery_HIGH =30000; |
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const TUint16 KNaptIcmpQuery_LOW =28000; |
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class CNaptTimer; |
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class CNaptIPPortMap; |
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NONSHARABLE_CLASS(CNaptIPPortMap): public CBase |
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{ |
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friend class CProtocolNapt; |
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public: |
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static CNaptIPPortMap* NewL(); |
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~CNaptIPPortMap(); |
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public: |
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TUint16 iSrcPort; //original source Address port |
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TUint16 iDstPort; //just needed to compare in EntryExists function |
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TUint16 iTrPort; //final translated port |
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TUint8 iProtocolFlag; //soft state for tcp session close |
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TUint iProtocolType; //type of protocol TCP/UDP/ICMP |
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TUint32 iSrcIpAddr; //original source address |
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TUint32 iTrIpAddr; //final translated ip address |
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TUint32 iDstIpAddr; //just needed to compare in EntryExists function |
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TUint32 iCurTime; //used for deleting the entry based on the timout values |
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TNaptConfigInfo* iConfigInfo; //used for fetching packet specific configuration in InBound hook |
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TSglQueLink* iLink; |
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}; |
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class TNaptIPPortMap : public TSglQue<CNaptIPPortMap> |
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{ |
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public: |
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TNaptIPPortMap(): |
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TSglQue<CNaptIPPortMap>(_FOFF(CNaptIPPortMap, iLink)) {}; |
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}; |
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typedef class TSglQueIter<CNaptIPPortMap> TNaptTableIter; |
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class TNaptTableMapMgr |
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{ |
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friend class CProtocolNapt; |
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public: |
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TNaptTableMapMgr(); |
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~TNaptTableMapMgr(); |
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inline TInt FindBucket(TInt aPortNo){ return aPortNo % KTranslationHashTableSize; } |
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inline TInt GetIndexedPortCount(){ return iBucketsInUse;} |
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CNaptIPPortMap* FindOrCreateNaptEntryL( TUint aProtocolType,const TUint32& aSrcAddr,const TUint32& aDstAddr,const TUint16 aSrcPort,const TUint16 aDstPort, const TNaptConfigInfo *aConfigInfo); |
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TBool VerifySender(const CNaptIPPortMap* aTableNode, const TUint32& aSrcIp,TUint16 aSrcPort); |
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CNaptIPPortMap* GetIPTranslationNode(TUint16 aDstPortNo); |
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void DeleteNodeInIndexedList(TInt aIndex, CNaptIPPortMap *aTableNode); |
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void TimerComplete(); |
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void HandleTcpConnectionPhases( TInet6Checksum<TInet6HeaderTCP> &aPacket, CNaptIPPortMap* aTableNode,const TInt direction); |
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private : |
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CNaptIPPortMap *AllocateTranslationNodeL(TUint aProtocolType,const TUint32& aSrcAddr,const TUint32& aDstAddr,const TUint16 aSrcPort ,const TUint16 aDstPort, const TNaptConfigInfo *aConfigInfo, TUint16 aQueryId=0); |
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void DeleteNaptTableNode( CNaptIPPortMap* aTableNode); |
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private : |
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TNaptIPPortMap iIPPortMap[KTranslationHashTableSize]; |
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TUint16 iLastPort; |
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TInt16 iBucketsInUse; |
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TUint16 iIcmpQueryId; |
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TUint32 iPublicGatewayIP; |
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CNaptTimer* iTimerPtr; |
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}; |
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#endif //translation.h |