/*
Copyright (C)2003 Barry Dunne (http://www.emule-project.net)
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

// Note To Mods //
/*
Please do not change anything here and release it..
There is going to be a new forum created just for the Kademlia side of the client..
If you feel there is an error or a way to improve something, please
post it in the forum first and let us look at it.. If it is a real improvement,
it will be added to the official client.. Changing something without knowing
what all it does can cause great harm to the network if released in mass form..
Any mod that changes anything within the Kademlia side will not be allowed to advertise
there client on the eMule forum..
*/

#pragma once
#include "../routing/Maps.h"
#include "./PacketTracking.h"

class CSafeMemFile;
struct SSearchTerm;

namespace Kademlia
{
	class CKadUDPKey;
	class CKadClientSearcher;

	struct FetchNodeID_Struct{
		UINT dwIP;
		UINT dwTCPPort;
		UINT dwExpire;
		CKadClientSearcher* pRequester;
	};

	class CKademliaUDPListener : public CPacketTracking
	{
			friend class CSearch;
		public:
			~CKademliaUDPListener();
			void Bootstrap(LPCTSTR uIP, const uint16 uUDPPort);
			void Bootstrap(const UINT uIP, const uint16 uUDPPort, const uint8 byKadVersion = 0, const CUInt128* uCryptTargetID = NULL);
			void FirewalledCheck(const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey, const uint8 byKadVersion);
			void SendMyDetails(const byte byOpcode, const UINT uIP, const uint16 uUDPPort, const uint8 byKadVersion, CKadUDPKey targetUDPKey, const CUInt128* uCryptTargetID, const bool bRequestAckPackage);
			void SendPublishSourcePacket(CContact* pContact, const CUInt128& uTargetID, const CUInt128& uContactID, const TagList& tags);
			void SendNullPacket(const byte byOpcode, const UINT uIP, const uint16 uUDPPort, CKadUDPKey targetUDPKey, const CUInt128* uCryptTargetID);
			virtual void ProcessPacket(const byte* pbyData, const UINT uLenData, const UINT uIP, const uint16 uUDPPort, const bool bValidReceiverKey, CKadUDPKey senderUDPKey);
			void SendPacket(const byte* pbyData, const UINT uLenData, const UINT uDestinationHost, const uint16 uDestinationPort, CKadUDPKey targetUDPKey, const CUInt128* uCryptTargetID);
			void SendPacket(const byte *pbyData, const UINT uLenData, const byte byOpcode, const UINT uDestinationHost, const uint16 uDestinationPort, CKadUDPKey targetUDPKey, const CUInt128* uCryptTargetID);
			void SendPacket(CSafeMemFile* pfileData, const byte byOpcode, const UINT uDestinationHost, const uint16 uDestinationPort, CKadUDPKey targetUDPKey, const CUInt128* uCryptTargetID);
			
			bool FindNodeIDByIP(CKadClientSearcher* pRequester, const UINT dwIP, const uint16 nTCPPort, const uint16 nUDPPort, const uint8 byVersion); //>>> WiZaRd::FiX
			void ExpireClientSearch(CKadClientSearcher* pExpireImmediately = NULL);
		private:
			bool AddContact_KADEMLIA2 (const byte* pbyData, const UINT uLenData, const UINT uIP, uint16& uUDPPort, uint8* pnOutVersion, CKadUDPKey cUDPKey, bool& rbIPVerified, const bool bUpdate, const bool bFromHelloReq, bool* pbOutRequestsACK, CUInt128* puOutContactID);
			void SendLegacyChallenge(const UINT uIP, const uint16 uUDPPort, const CUInt128& uContactID);
			static SSearchTerm* CreateSearchExpressionTree(CSafeMemFile& fileIO, int iLevel);
			static void Free(SSearchTerm* pSearchTerms);
			void Process_KADEMLIA2_BOOTSTRAP_REQ (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey); // WiZaRd
			void Process_KADEMLIA2_BOOTSTRAP_RES (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey, bool bValidReceiverKey);
			void Process_KADEMLIA2_HELLO_REQ (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, uint16 uUDPPort, CKadUDPKey senderUDPKey, const bool bValidReceiverKey);
			void Process_KADEMLIA2_HELLO_RES (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, uint16 uUDPPort, CKadUDPKey senderUDPKey, bool bValidReceiverKey);
			void Process_KADEMLIA2_HELLO_RES_ACK (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const bool bValidReceiverKey);
			void Process_KADEMLIA2_REQ (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey);
			void Process_KADEMLIA2_RES (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey);
			void Process_KADEMLIA2_SEARCH_KEY_REQ (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey);
			void Process_KADEMLIA2_SEARCH_SOURCE_REQ (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey);
			void Process_KADEMLIA_SEARCH_RES (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort);
			void Process_KADEMLIA2_SEARCH_RES (const byte* pbyPacketData, const UINT uLenPacket, CKadUDPKey senderUDPKey, const UINT uIP, const uint16 uUDPPort);
			void Process_KADEMLIA2_PUBLISH_KEY_REQ (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey);
			void Process_KADEMLIA2_PUBLISH_SOURCE_REQ (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey);
			void Process_KADEMLIA_PUBLISH_RES (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP);
			void Process_KADEMLIA2_PUBLISH_RES (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey);
			void Process_KADEMLIA2_SEARCH_NOTES_REQ (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey);
			void Process_KADEMLIA_SEARCH_NOTES_RES (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort);
			void Process_KADEMLIA2_PUBLISH_NOTES_REQ (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey);
			void Process_KADEMLIA_FIREWALLED_REQ (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey);
			void Process_KADEMLIA_FIREWALLED2_REQ (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey);
			void Process_KADEMLIA_FIREWALLED_RES (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, CKadUDPKey senderUDPKey);
			void Process_KADEMLIA_FIREWALLED_ACK_RES (const UINT uLenPacket);
			void Process_KADEMLIA_FINDBUDDY_REQ (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey);
			void Process_KADEMLIA_FINDBUDDY_RES (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey);
			void Process_KADEMLIA_CALLBACK_REQ (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, CKadUDPKey senderUDPKey);
			void Process_KADEMLIA2_PING (const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey);
			void Process_KADEMLIA2_PONG (const byte* pbyPacketData, const UINT uLenPacket, const UINT uIP, const uint16 uUDPPort, CKadUDPKey senderUDPKey);
			void Process_KADEMLIA2_FIREWALLUDP(const byte *pbyPacketData, const UINT uLenPacket,const UINT uIP, CKadUDPKey senderUDPKey);

			CList<FetchNodeID_Struct> listFetchNodeIDRequests;
			UINT	m_nOpenHellos;
			UINT	m_nFirewalledHellos;
	};
}
