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ClientList.cpp
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//this file is part of eMule
//Copyright (C)2002-2008 Merkur ( strEmail.Format("%s@%s", "devteam", "emule-project.net") / 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.
#include "stdafx.h"
#include "emule.h"
#include "ClientList.h"
#include "otherfunctions.h"
#include "Kademlia/Kademlia/kademlia.h"
#include "Kademlia/Kademlia/prefs.h"
#include "Kademlia/Kademlia/search.h"
#include "Kademlia/Kademlia/searchmanager.h"
#include "Kademlia/routing/contact.h"
#include "Kademlia/net/kademliaudplistener.h"
#include "kademlia/kademlia/UDPFirewallTester.h"
#include "kademlia/utils/UInt128.h"
#include "LastCommonRouteFinder.h"
#include "UploadQueue.h"
#include "DownloadQueue.h"
#include "UpDownClient.h"
#include "ClientCredits.h"
#include "ListenSocket.h"
#include "Opcodes.h"
#include "emuledlg.h"
#include "TransferDlg.h"
#include "Log.h"
#include "packets.h"
#include "Statistics.h"
#ifdef INFO_WND
#include "./Mod/InfoWnd.h" //>>> WiZaRd::ClientAnalyzer
#endif
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
//>>> WiZaRd::FiX
//helper function... use the available IP
#ifdef IPV6_SUPPORT
bool CompareIP(const CUpDownClient* client, const CAddress& dwIP) //>>> WiZaRd::IPv6 [Xanatos]
#else
bool CompareIP(const CUpDownClient* client, const UINT dwIP)
#endif
{
#ifdef IPV6_SUPPORT
//>>> WiZaRd::IPv6 [Xanatos]
CAddress comp = dwIP.GetType() == CAddress::IPv6 ? client->GetIPv6() : client->GetIPv4();
if (comp.IsNull())
comp = client->GetConnectIP();
if (!comp.IsNull())
return comp == dwIP;
return false;
//<<< WiZaRd::IPv6 [Xanatos]
#else
if (client->GetIP() != 0)
return client->GetIP() == dwIP;
return client->GetConnectIP() == dwIP;
#endif
}
//<<< WiZaRd::FiX
CClientList::CClientList()
{
m_dwLastBannCleanUp = 0;
m_dwLastTrackedCleanUp = 0;
m_dwLastClientCleanUp = 0;
m_nBuddyStatus = Disconnected;
m_bannedList.InitHashTable(331);
m_trackedClientsList.InitHashTable(2011);
m_globDeadSourceList.Init(true);
m_pBuddy = NULL;
}
CClientList::~CClientList()
{
RemoveAllTrackedClients();
}
void CClientList::GetStatistics(UINT &ruTotalClients, int stats[NUM_CLIENTLIST_STATS],
CMap<UINT, UINT, UINT, UINT>& clientVersionEDonkey,
CMap<UINT, UINT, UINT, UINT>& clientVersionEDonkeyHybrid,
CMap<UINT, UINT, UINT, UINT>& clientVersionEMule,
CMap<UINT, UINT, UINT, UINT>& clientVersionKMule,
CMap<UINT, UINT, UINT, UINT>& clientVersionAMule)
{
ruTotalClients = list.GetCount();
memset(stats, 0, sizeof(stats[0]) * NUM_CLIENTLIST_STATS);
for (POSITION pos = list.GetHeadPosition(); pos != NULL;)
{
const CUpDownClient* cur_client = list.GetNext(pos);
if (cur_client->HasLowID())
stats[14]++;
switch (cur_client->GetClientSoft())
{
case SO_EMULE:
case SO_OLDEMULE:
stats[2]++;
clientVersionEMule[cur_client->GetVersion()]++;
break;
//>>> WiZaRd::kMule Version Ident
case SO_KMULE:
++stats[20];
++clientVersionKMule[cur_client->GetVersion()];
break;
//<<< WiZaRd::kMule Version Ident
case SO_EDONKEYHYBRID :
stats[4]++;
clientVersionEDonkeyHybrid[cur_client->GetVersion()]++;
break;
case SO_AMULE:
stats[10]++;
clientVersionAMule[cur_client->GetVersion()]++;
break;
case SO_EDONKEY:
stats[1]++;
clientVersionEDonkey[cur_client->GetVersion()]++;
break;
case SO_MLDONKEY:
stats[3]++;
break;
case SO_SHAREAZA:
stats[11]++;
break;
// all remaining 'eMule Compatible' clients
//>>> WiZaRd::ClientAnalyer
// Spike2 - Enhanced Client Recognition - START
case SO_HYDRANODE:
case SO_EMULEPLUS:
case SO_TRUSTYFILES:
// Spike2 - Enhanced Client Recognition - END
//<<< WiZaRd::ClientAnalyer
case SO_CDONKEY:
case SO_XMULE:
case SO_LPHANT:
stats[5]++;
break;
default:
stats[0]++;
break;
}
if (cur_client->Credits() != NULL)
{
switch (cur_client->Credits()->GetCurrentIdentState(cur_client->GetIP()))
{
case IS_IDENTIFIED:
stats[12]++;
break;
case IS_IDFAILED:
case IS_IDNEEDED:
case IS_IDBADGUY:
stats[13]++;
break;
}
}
if (cur_client->GetDownloadState()==DS_ERROR)
stats[6]++; // Error
switch (cur_client->GetUserPort())
{
case 4662:
stats[8]++; // Default Port
break;
default:
stats[9]++; // Other Port
}
// Network client stats
if (cur_client->GetServerIP() && cur_client->GetServerPort())
{
stats[15]++; // eD2K
if (cur_client->GetKadPort())
{
stats[17]++; // eD2K/Kad
stats[16]++; // Kad
}
}
else if (cur_client->GetKadPort())
stats[16]++; // Kad
else
stats[18]++; // Unknown
//>>> WiZaRd::Detect UDP problem clients
if (cur_client->IsUDPDisabled())
++stats[19];
//<<< WiZaRd::Detect UDP problem clients
}
}
void CClientList::AddClient(CUpDownClient* toadd, bool bSkipDupTest)
{
// skipping the check for duplicate list entries is only to be done for optimization purposes, if the calling
// function has ensured that this client instance is not already within the list -> there are never duplicate
// client instances in this list.
if (!bSkipDupTest)
{
if (list.Find(toadd))
return;
}
theApp.emuledlg->transferwnd->GetClientList()->AddClient(toadd);
list.AddTail(toadd);
}
// ZZ:UploadSpeedSense -->
bool CClientList::GiveClientsForTraceRoute()
{
// this is a host that lastCommonRouteFinder can use to traceroute
return theApp.lastCommonRouteFinder->AddHostsToCheck(list);
}
// ZZ:UploadSpeedSense <--
void CClientList::RemoveClient(CUpDownClient* toremove, LPCTSTR pszReason)
{
POSITION pos = list.Find(toremove);
if (pos)
{
theApp.uploadqueue->RemoveFromUploadQueue(toremove, L"CClientList::RemoveClient: " + CString(pszReason));
theApp.uploadqueue->RemoveFromWaitingQueue(toremove);
theApp.downloadqueue->RemoveSource(toremove);
theApp.emuledlg->transferwnd->GetClientList()->RemoveClient(toremove);
list.RemoveAt(pos);
}
RemoveFromKadList(toremove);
RemoveConnectingClient(toremove);
}
void CClientList::DeleteAll()
{
theApp.uploadqueue->DeleteAll();
theApp.downloadqueue->DeleteAll();
while (!list.IsEmpty())
delete list.RemoveHead(); // recursive: this will call RemoveClient :-X
}
bool CClientList::AttachToAlreadyKnown(CUpDownClient** client, CClientReqSocket* sender)
{
POSITION pos1, pos2;
CUpDownClient* tocheck = (*client);
CUpDownClient* found_client = NULL;
CUpDownClient* found_client2 = NULL;
for (pos1 = list.GetHeadPosition(); (pos2 = pos1) != NULL;)
{
list.GetNext(pos1);
CUpDownClient* cur_client = list.GetAt(pos2);
if (tocheck->Compare(cur_client,false)) //matching userhash
{
found_client2 = cur_client;
}
if (tocheck->Compare(cur_client,true)) //matching IP
{
found_client = cur_client;
break;
}
}
if (found_client == NULL)
found_client = found_client2;
if (found_client != NULL)
{
if (tocheck == found_client)
{
//we found the same client instance (client may have sent more than one OP_HELLO). do not delete that client!
return true;
}
if (sender)
{
if (found_client->socket)
{
if (found_client->socket->IsConnected()
&& (found_client->GetIP() != tocheck->GetIP() || found_client->GetUserPort() != tocheck->GetUserPort()))
{
// if found_client is connected and has the IS_IDENTIFIED, it's safe to say that the other one is a bad guy
if (found_client->Credits() && found_client->Credits()->GetCurrentIdentState(found_client->GetIP()) == IS_IDENTIFIED)
{
if (thePrefs.GetLogBannedClients())
AddDebugLogLine(false, _T("Clients: %s (%s), Banreason: Userhash invalid"), tocheck->GetUserName(), ipstr(tocheck->GetConnectIP()));
tocheck->Ban();
return false;
}
//IDS_CLIENTCOL Warning: Found matching client, to a currently connected client: %s (%s) and %s (%s)
if (thePrefs.GetLogBannedClients())
AddDebugLogLine(true,GetResString(IDS_CLIENTCOL), tocheck->GetUserName(), ipstr(tocheck->GetConnectIP()), found_client->GetUserName(), ipstr(found_client->GetConnectIP()));
return false;
}
found_client->socket->client = 0;
found_client->socket->Safe_Delete();
}
found_client->socket = sender;
tocheck->socket = 0;
}
*client = 0;
delete tocheck;
*client = found_client;
return true;
}
return false;
}
#ifdef IPV6_SUPPORT
CUpDownClient* CClientList::FindClientByIP(const CAddress& clientip, const UINT port) const //>>> WiZaRd::IPv6 [Xanatos]
#else
CUpDownClient* CClientList::FindClientByIP(const UINT clientip, const UINT port) const
#endif
{
for (POSITION pos = list.GetHeadPosition(); pos != NULL;)
{
CUpDownClient* cur_client = list.GetNext(pos);
if (CompareIP(cur_client, clientip) && cur_client->GetUserPort() == port)
return cur_client;
}
return 0;
}
#ifdef IPV6_SUPPORT
CUpDownClient* CClientList::FindClientByUserHash(const uchar* clienthash, const CAddress& dwIP, const uint16 nTCPPort) const //>>> WiZaRd::IPv6 [Xanatos]
#else
CUpDownClient* CClientList::FindClientByUserHash(const uchar* clienthash, const UINT dwIP, const uint16 nTCPPort) const
#endif
{
CUpDownClient* pFound = NULL;
for (POSITION pos = list.GetHeadPosition(); pos != NULL;)
{
CUpDownClient* cur_client = list.GetNext(pos);
if (!md4cmp(cur_client->GetUserHash() ,clienthash))
{
#ifdef IPV6_SUPPORT
if ((dwIP.IsNull() || CompareIP(cur_client, dwIP)) && (nTCPPort == 0 || nTCPPort == cur_client->GetUserPort())) //>>> WiZaRd::IPv6 [Xanatos]
#else
if ((dwIP == 0 || CompareIP(cur_client, dwIP)) && (nTCPPort == 0 || nTCPPort == cur_client->GetUserPort()))
#endif
return cur_client;
else
pFound = pFound != NULL ? pFound : cur_client;
}
}
return pFound;
}
#ifdef IPV6_SUPPORT
CUpDownClient* CClientList::FindClientByIP(const CAddress& clientip) const //>>> WiZaRd::IPv6 [Xanatos]
#else
CUpDownClient* CClientList::FindClientByIP(const UINT clientip) const
#endif
{
for (POSITION pos = list.GetHeadPosition(); pos != NULL;)
{
CUpDownClient* cur_client = list.GetNext(pos);
if (CompareIP(cur_client, clientip))
return cur_client;
}
return 0;
}
#ifdef IPV6_SUPPORT
CUpDownClient* CClientList::FindClientByIP_UDP(const CAddress& clientip, const UINT nUDPport) const //>>> WiZaRd::IPv6 [Xanatos]
#else
CUpDownClient* CClientList::FindClientByIP_UDP(const UINT clientip, const UINT nUDPport) const
#endif
{
for (POSITION pos = list.GetHeadPosition(); pos != NULL;)
{
CUpDownClient* cur_client = list.GetNext(pos);
if (CompareIP(cur_client, clientip) && cur_client->GetUDPPort() == nUDPport)
return cur_client;
}
return 0;
}
CUpDownClient* CClientList::FindClientByUserID_KadPort(UINT clientID, uint16 kadPort) const
{
for (POSITION pos = list.GetHeadPosition(); pos != NULL;)
{
CUpDownClient* cur_client = list.GetNext(pos);
if (cur_client->GetUserIDHybrid() == clientID && cur_client->GetKadPort() == kadPort)
return cur_client;
}
return 0;
}
#ifdef IPV6_SUPPORT
CUpDownClient* CClientList::FindClientByIP_KadPort(const CAddress& ip, const uint16 port) const //>>> WiZaRd::IPv6 [Xanatos]
#else
CUpDownClient* CClientList::FindClientByIP_KadPort(const UINT ip, const uint16 port) const
#endif
{
for (POSITION pos = list.GetHeadPosition(); pos != NULL;)
{
CUpDownClient* cur_client = list.GetNext(pos);
if (CompareIP(cur_client, ip) && cur_client->GetKadPort() == port)
return cur_client;
}
return 0;
}
CUpDownClient* CClientList::FindClientByServerID(UINT uServerIP, UINT uED2KUserID) const
{
UINT uHybridUserID = ntohl(uED2KUserID);
for (POSITION pos = list.GetHeadPosition(); pos != NULL;)
{
CUpDownClient* cur_client = list.GetNext(pos);
if (cur_client->GetServerIP() == uServerIP && cur_client->GetUserIDHybrid() == uHybridUserID)
return cur_client;
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// Banned clients
void CClientList::AddBannedClient(UINT dwIP)
{
m_bannedList.SetAt(dwIP, ::GetTickCount());
}
bool CClientList::IsBannedClient(UINT dwIP) const
{
UINT dwBantime;
if (m_bannedList.Lookup(dwIP, dwBantime))
{
if (dwBantime + CLIENTBANTIME > ::GetTickCount())
return true;
}
return false;
}
void CClientList::RemoveBannedClient(UINT dwIP)
{
m_bannedList.RemoveKey(dwIP);
}
void CClientList::RemoveAllBannedClients()
{
m_bannedList.RemoveAll();
}
///////////////////////////////////////////////////////////////////////////////
// Tracked clients
void CClientList::AddTrackClient(CUpDownClient* toadd)
{
#ifdef IPV6_SUPPORT
//>>> WiZaRd::IPv6 [Xanatos]
if (toadd->GetIP().GetType() != CAddress::IPv4) // IPv6-TODO: Add IPv6 tracking
return;
UINT dwIP = _ntohl(toadd->GetIP().ToIPv4());
//<<< WiZaRd::IPv6 [Xanatos]
#else
UINT dwIP = toadd->GetIP();
#endif
CDeletedClient* pResult = 0;
if (m_trackedClientsList.Lookup(dwIP, pResult))
{
pResult->m_dwInserted = ::GetTickCount();
for (int i = 0; i != pResult->m_ItemsList.GetCount(); i++)
{
if (pResult->m_ItemsList[i].nPort == toadd->GetUserPort())
{
// already tracked, update
pResult->m_ItemsList[i].pHash = toadd->Credits();
return;
}
}
PORTANDHASH porthash = { toadd->GetUserPort(), toadd->Credits()};
pResult->m_ItemsList.Add(porthash);
}
else
m_trackedClientsList.SetAt(dwIP, new CDeletedClient(toadd));
}
// true = everything ok, hash didn't changed
// false = hash changed
bool CClientList::ComparePriorUserhash(UINT dwIP, uint16 nPort, void* pNewHash)
{
CDeletedClient* pResult = 0;
if (m_trackedClientsList.Lookup(dwIP, pResult))
{
for (int i = 0; i != pResult->m_ItemsList.GetCount(); i++)
{
if (pResult->m_ItemsList[i].nPort == nPort)
{
if (pResult->m_ItemsList[i].pHash != pNewHash)
return false;
else
break;
}
}
}
return true;
}
UINT CClientList::GetClientsFromIP(UINT dwIP) const
{
CDeletedClient* pResult;
if (m_trackedClientsList.Lookup(dwIP, pResult))
return pResult->m_ItemsList.GetCount();
return 0;
}
void CClientList::TrackBadRequest(const CUpDownClient* upcClient, int nIncreaseCounter)
{
#ifdef IPV6_SUPPORT
//>>> WiZaRd::IPv6 [Xanatos]
if (upcClient->GetIP().GetType() != CAddress::IPv4) // IPv6-TODO: Add IPv6 tracking
return;
UINT dwIP = _ntohl(upcClient->GetIP().ToIPv4());
//<<< WiZaRd::IPv6 [Xanatos]
#else
UINT dwIP = upcClient->GetIP();
#endif
if (dwIP == 0)
{
ASSERT(0);
return;
}
CDeletedClient* pResult = NULL;
if (m_trackedClientsList.Lookup(dwIP, pResult))
{
pResult->m_dwInserted = ::GetTickCount();
pResult->m_cBadRequest += nIncreaseCounter;
}
else
{
CDeletedClient* ccToAdd = new CDeletedClient(upcClient);
ccToAdd->m_cBadRequest = nIncreaseCounter;
m_trackedClientsList.SetAt(dwIP, ccToAdd);
}
}
UINT CClientList::GetBadRequests(const CUpDownClient* upcClient) const
{
#ifdef IPV6_SUPPORT
//>>> WiZaRd::IPv6 [Xanatos]
if (upcClient->GetIP().GetType() != CAddress::IPv4) // IPv6-TODO: Add IPv6 tracking
return 0;
UINT dwIP = _ntohl(upcClient->GetIP().ToIPv4());
//<<< WiZaRd::IPv6 [Xanatos]
#else
UINT dwIP = upcClient->GetIP();
#endif
if (dwIP == 0)
{
ASSERT(0);
return 0;
}
CDeletedClient* pResult = NULL;
if (m_trackedClientsList.Lookup(dwIP, pResult))
return pResult->m_cBadRequest;
else
return 0;
}
void CClientList::RemoveAllTrackedClients()
{
POSITION pos = m_trackedClientsList.GetStartPosition();
UINT nKey;
CDeletedClient* pResult;
while (pos != NULL)
{
m_trackedClientsList.GetNextAssoc(pos, nKey, pResult);
m_trackedClientsList.RemoveKey(nKey);
delete pResult;
}
}
void CClientList::Process()
{
///////////////////////////////////////////////////////////////////////////
// Cleanup banned client list
//
const UINT cur_tick = ::GetTickCount();
if (m_dwLastBannCleanUp + BAN_CLEANUP_TIME < cur_tick)
{
m_dwLastBannCleanUp = cur_tick;
POSITION pos = m_bannedList.GetStartPosition();
UINT nKey;
UINT dwBantime;
while (pos != NULL)
{
m_bannedList.GetNextAssoc(pos, nKey, dwBantime);
if (dwBantime + CLIENTBANTIME < cur_tick)
RemoveBannedClient(nKey);
}
}
///////////////////////////////////////////////////////////////////////////
// Cleanup tracked client list
//
if (m_dwLastTrackedCleanUp + TRACKED_CLEANUP_TIME < cur_tick)
{
m_dwLastTrackedCleanUp = cur_tick;
if (thePrefs.GetLogBannedClients())
AddDebugLogLine(false, _T("Cleaning up TrackedClientList, %i clients on List..."), m_trackedClientsList.GetCount());
POSITION pos = m_trackedClientsList.GetStartPosition();
UINT nKey;
CDeletedClient* pResult;
while (pos != NULL)
{
m_trackedClientsList.GetNextAssoc(pos, nKey, pResult);
if (pResult->m_dwInserted + KEEPTRACK_TIME < cur_tick)
{
m_trackedClientsList.RemoveKey(nKey);
delete pResult;
}
}
if (thePrefs.GetLogBannedClients())
AddDebugLogLine(false, _T("...done, %i clients left on list"), m_trackedClientsList.GetCount());
}
///////////////////////////////////////////////////////////////////////////
// Process Kad client list
//
//We need to try to connect to the clients in m_KadList
//If connected, remove them from the list and send a message back to Kad so we can send a ACK.
//If we don't connect, we need to remove the client..
//The sockets timeout should delete this object.
// buddy is just a flag that is used to make sure we are still connected or connecting to a buddy.
buddyState buddy = Disconnected;
for (POSITION pos = m_KadList.GetHeadPosition(); pos != NULL;)
{
POSITION posLast = pos;
CUpDownClient* cur_client = m_KadList.GetNext(pos);
if (!Kademlia::CKademlia::IsRunning())
{
//Clear out this list if we stop running Kad.
//Setting the Kad state to KS_NONE causes it to be removed in the switch below.
cur_client->SetKadState(KS_NONE);
}
switch (cur_client->GetKadState())
{
case KS_QUEUED_FWCHECK:
case KS_QUEUED_FWCHECK_UDP:
//Another client asked us to try to connect to them to check their firewalled status.
cur_client->TryToConnect(true, true);
break;
case KS_CONNECTING_FWCHECK:
//Ignore this state as we are just waiting for results.
break;
case KS_FWCHECK_UDP:
case KS_CONNECTING_FWCHECK_UDP:
// we want a UDP firewallcheck from this client and are just waiting to get connected to send the request
break;
case KS_CONNECTED_FWCHECK:
//We successfully connected to the client.
//We now send a ack to let them know.
if (cur_client->GetKadVersion() >= KADEMLIA_VERSION7_49a)
{
// the result is now sent per TCP instead of UDP, because this will fail if our intern UDP port is unreachable.
// But we want the TCP testresult regardless if UDP is firewalled, the new UDP state and test takes care of the rest
ASSERT(cur_client->socket != NULL && cur_client->socket->IsConnected());
if (thePrefs.GetDebugClientTCPLevel() > 0)
DebugSend("OP_KAD_FWTCPCHECK_ACK", cur_client);
Packet* pPacket = new Packet(OP_KAD_FWTCPCHECK_ACK, 0, OP_EMULEPROT);
if (!cur_client->SafeConnectAndSendPacket(pPacket))
cur_client = NULL;
}
else
{
if (thePrefs.GetDebugClientKadUDPLevel() > 0)
DebugSend("KADEMLIA_FIREWALLED_ACK_RES", cur_client->GetIP(), cur_client->GetKadPort());
#ifdef IPV6_SUPPORT
Kademlia::CKademlia::GetUDPListener()->SendNullPacket(KADEMLIA_FIREWALLED_ACK_RES, cur_client->GetIP().ToIPv4(), cur_client->GetKadPort(), 0, NULL); //>>> WiZaRd::IPv6 [Xanatos]
#else
Kademlia::CKademlia::GetUDPListener()->SendNullPacket(KADEMLIA_FIREWALLED_ACK_RES, ntohl(cur_client->GetIP()), cur_client->GetKadPort(), 0, NULL);
#endif
}
//We are done with this client. Set Kad status to KS_NONE and it will be removed in the next cycle.
if (cur_client != NULL)
cur_client->SetKadState(KS_NONE);
break;
case KS_INCOMING_BUDDY:
//A firewalled client wants us to be his buddy.
//If we already have a buddy, we set Kad state to KS_NONE and it's removed in the next cycle.
//If not, this client will change to KS_CONNECTED_BUDDY when it connects.
if (m_nBuddyStatus == Connected)
cur_client->SetKadState(KS_NONE);
break;
case KS_QUEUED_BUDDY:
//We are firewalled and want to request this client to be a buddy.
//But first we check to make sure we are not already trying another client.
//If we are not already trying. We try to connect to this client.
//If we are already connected to a buddy, we set this client to KS_NONE and it's removed next cycle.
//If we are trying to connect to a buddy, we just ignore as the one we are trying may fail and we can then try this one.
if (m_nBuddyStatus == Disconnected)
{
buddy = Connecting;
m_nBuddyStatus = Connecting;
cur_client->SetKadState(KS_CONNECTING_BUDDY);
cur_client->TryToConnect(true, true);
#ifdef INFO_WND
theApp.emuledlg->infoWnd->UpdateMyInfo(); //>>> WiZaRd::InfoWnd
#endif
}
else if (m_nBuddyStatus == Connected)
cur_client->SetKadState(KS_NONE);
break;
case KS_CONNECTING_BUDDY:
//We are trying to connect to this client.
//Although it should NOT happen, we make sure we are not already connected to a buddy.
//If we are we set to KS_NONE and it's removed next cycle.
//But if we are not already connected, make sure we set the flag to connecting so we know
//things are working correctly.
if (m_nBuddyStatus == Connected)
cur_client->SetKadState(KS_NONE);
else
{
ASSERT(m_nBuddyStatus == Connecting);
buddy = Connecting;
}
break;
case KS_CONNECTED_BUDDY:
//A potential connected buddy client wanting to me in the Kad network
//We set our flag to connected to make sure things are still working correctly.
buddy = Connected;
//If m_nBuddyStatus is not connected already, we set this client as our buddy!
if (m_nBuddyStatus != Connected)
{
m_pBuddy = cur_client;
m_nBuddyStatus = Connected;
#ifdef INFO_WND
theApp.emuledlg->infoWnd->UpdateMyInfo(); //>>> WiZaRd::InfoWnd
#endif
}
if (m_pBuddy == cur_client && theApp.IsFirewalled() && cur_client->SendBuddyPingPong())
{
if (thePrefs.GetDebugClientTCPLevel() > 0)
DebugSend("OP__BuddyPing", cur_client);
Packet* buddyPing = new Packet(OP_BUDDYPING, 0, OP_EMULEPROT);
theStats.AddUpDataOverheadOther(buddyPing->size);
VERIFY(cur_client->SendPacket(buddyPing, true, true));
cur_client->SetLastBuddyPingPongTime();
}
break;
default:
if (cur_client == m_pBuddy)
{
buddy = Disconnected;
m_nBuddyStatus = Disconnected; //>>> WiZaRd::FiX?
m_pBuddy = NULL;
}
m_KadList.RemoveAt(posLast);
break;
}
}
//We either never had a buddy, or lost our buddy..
if (buddy == Disconnected)
{
if (m_nBuddyStatus != Disconnected || m_pBuddy)
{
if (Kademlia::CKademlia::IsRunning() && theApp.IsFirewalled() && Kademlia::CUDPFirewallTester::IsFirewalledUDP(true))
{
//We are a lowID client and we just lost our buddy.
//Go ahead and instantly try to find a new buddy.
Kademlia::CKademlia::GetPrefs()->SetFindBuddy();
}
m_pBuddy = NULL;
m_nBuddyStatus = Disconnected;
#ifdef INFO_WND
theApp.emuledlg->infoWnd->UpdateMyInfo(); //>>> WiZaRd::InfoWnd
#endif
}
}
if (Kademlia::CKademlia::IsConnected())
{
//we only need a buddy if direct callback is not available
if (Kademlia::CKademlia::IsFirewalled() && Kademlia::CUDPFirewallTester::IsFirewalledUDP(true))
{
//TODO 0.49b: Kad buddies won'T work with RequireCrypt, so it is disabled for now but should (and will)
//be fixed in later version
// Update: Buddy connections itself support obfuscation properly since 0.49a (this makes it work fine if our buddy uses require crypt)
// ,however callback requests don't support it yet so we wouldn't be able to answer callback requests with RequireCrypt, protocolchange intended for the next version
if (m_nBuddyStatus == Disconnected && Kademlia::CKademlia::GetPrefs()->GetFindBuddy() && !thePrefs.IsClientCryptLayerRequired())
{
DEBUG_ONLY(DebugLog(_T("Starting Buddysearch")));
//We are a firewalled client with no buddy. We have also waited a set time
//to try to avoid a false firewalled status.. So lets look for a buddy..
if (!Kademlia::CSearchManager::PrepareLookup(Kademlia::CSearch::FINDBUDDY, true, Kademlia::CUInt128(true).Xor(Kademlia::CKademlia::GetPrefs()->GetKadID())))
{
//This search ID was already going. Most likely reason is that
//we found and lost our buddy very quickly and the last search hadn't
//had time to be removed yet. Go ahead and set this to happen again
//next time around.
Kademlia::CKademlia::GetPrefs()->SetFindBuddy();
}
}
}
else
{
if (m_pBuddy)
{
//Lets make sure that if we have a buddy, they are firewalled!
//If they are also not firewalled, then someone must have fixed their firewall or stopped saturating their line..
//We just set the state of this buddy to KS_NONE and things will be cleared up with the next cycle.
if (!m_pBuddy->HasLowID())
m_pBuddy->SetKadState(KS_NONE);
}
}
}
else
{
if (m_pBuddy)
{
//We are not connected anymore. Just set this buddy to KS_NONE and things will be cleared out on next cycle.
m_pBuddy->SetKadState(KS_NONE);
}
}
///////////////////////////////////////////////////////////////////////////
// Cleanup client list
//
CleanUpClientList();
///////////////////////////////////////////////////////////////////////////
// Process Direct Callbacks for Timeouts
//
ProcessConnectingClientsList();
}
#ifdef _DEBUG
void CClientList::Debug_SocketDeleted(CClientReqSocket* deleted) const
{
for (POSITION pos = list.GetHeadPosition(); pos != NULL;)
{
CUpDownClient* cur_client = list.GetNext(pos);
if (!AfxIsValidAddress(cur_client, sizeof(CUpDownClient)))
{
AfxDebugBreak();
}
if (thePrefs.m_iDbgHeap >= 2)
ASSERT_VALID(cur_client);
if (cur_client->socket == deleted)
{
AfxDebugBreak();
}
}
}
#endif
bool CClientList::IsValidClient(CUpDownClient* tocheck) const
{
if (thePrefs.m_iDbgHeap >= 2)
ASSERT_VALID(tocheck);
return list.Find(tocheck)!=NULL;
}
///////////////////////////////////////////////////////////////////////////////
// Kad client list
bool CClientList::RequestTCP(Kademlia::CContact* contact, uint8 byConnectOptions)
{
UINT nContactIP = ntohl(contact->GetIPAddress());
// don't connect ourself
if (GetLocalIP() == nContactIP && thePrefs.GetPort() == contact->GetTCPPort())
return false;
#ifdef IPV6_SUPPORT
CUpDownClient* pNewClient = FindClientByIP(CAddress(_ntohl(nContactIP)), contact->GetTCPPort()); //>>> WiZaRd::IPv6 [Xanatos]
#else
CUpDownClient* pNewClient = FindClientByIP(nContactIP, contact->GetTCPPort());
#endif
if (!pNewClient)
pNewClient = new CUpDownClient(0, contact->GetTCPPort(), contact->GetIPAddress(), 0, 0, false);
else if (pNewClient->GetKadState() != KS_NONE)
return false; // already busy with this client in some way (probably buddy stuff), don't mess with it
//Add client to the lists to be processed.
pNewClient->SetKadPort(contact->GetUDPPort());
pNewClient->SetKadState(KS_QUEUED_FWCHECK);
if (contact->GetClientID() != 0)
{
byte ID[16];
contact->GetClientID().ToByteArray(ID);
pNewClient->SetUserHash(ID);
#if 0
pNewClient->SetConnectOptions(byConnectOptions, true, false);
#endif
}
#if 1
pNewClient->SetConnectOptions(byConnectOptions, true, false); // WiZaRd: need to set encrypt options anyways?
#endif
m_KadList.AddTail(pNewClient);
//This method checks if this is a dup already.
AddClient(pNewClient);
return true;
}
void CClientList::RequestBuddy(Kademlia::CContact* contact, uint8 byConnectOptions)
{
UINT nContactIP = ntohl(contact->GetIPAddress());
// don't connect ourself
if (GetLocalIP() == nContactIP && thePrefs.GetPort() == contact->GetTCPPort())
return;
#ifdef IPV6_SUPPORT
CUpDownClient* pNewClient = FindClientByIP(CAddress(_ntohl(nContactIP)), contact->GetTCPPort()); //>>> WiZaRd::IPv6 [Xanatos]
#else
CUpDownClient* pNewClient = FindClientByIP(nContactIP, contact->GetTCPPort());
#endif
if (!pNewClient)
pNewClient = new CUpDownClient(0, contact->GetTCPPort(), contact->GetIPAddress(), 0, 0, false);
else if (pNewClient->GetKadState() != KS_NONE)
return; // already busy with this client in some way (probably fw stuff), don't mess with it
else if (IsKadFirewallCheckIP(nContactIP)) // doing a kad firewall check with this IP, abort
{
DEBUG_ONLY(DebugLogWarning(_T("KAD tcp Firewallcheck / Buddy request collosion for IP %s"), ipstr(nContactIP)));
return;
}
//Add client to the lists to be processed.
pNewClient->SetKadPort(contact->GetUDPPort());
pNewClient->SetKadState(KS_QUEUED_BUDDY);
byte ID[16];
contact->GetClientID().ToByteArray(ID);
pNewClient->SetUserHash(ID);
pNewClient->SetConnectOptions(byConnectOptions, true, false);
AddToKadList(pNewClient);
//This method checks if this is a dup already.
AddClient(pNewClient);
}
bool CClientList::IncomingBuddy(Kademlia::CContact* contact, Kademlia::CUInt128* buddyID)
{
UINT nContactIP = ntohl(contact->GetIPAddress());
//If eMule already knows this client, abort this.. It could cause conflicts.
//Although the odds of this happening is very small, it could still happen.
#ifdef IPV6_SUPPORT
if (FindClientByIP(CAddress(_ntohl(nContactIP)), contact->GetTCPPort())) //>>> WiZaRd::IPv6 [Xanatos]
#else
if (FindClientByIP(nContactIP, contact->GetTCPPort()))
#endif
return false;
else if (IsKadFirewallCheckIP(nContactIP)) // doing a kad firewall check with this IP, abort
{
DEBUG_ONLY(DebugLogWarning(_T("KAD tcp Firewallcheck / Buddy request collosion for IP %s"), ipstr(nContactIP)));
return false;
}
else if (GetLocalIP() == nContactIP && thePrefs.GetPort() == contact->GetTCPPort())
return false; // don't connect ourself
//>>> WiZaRd::FiX?
if (buddyID == NULL)
{
theApp.QueueDebugLogLineEx(LOG_ERROR, L"Received empty buddyID in %hs", __FUNCTION__);
return false;
}
byte ID[16];
buddyID->ToByteArray(ID);
if (isnulmd4(ID))
{
theApp.QueueDebugLogLineEx(LOG_ERROR, L"Received invalid buddyID in %hs", __FUNCTION__);
return false;
}
//<<< WiZaRd::FiX?
//Add client to the lists to be processed.
CUpDownClient* pNewClient = new CUpDownClient(0, contact->GetTCPPort(), contact->GetIPAddress(), 0, 0, false);
pNewClient->SetKadPort(contact->GetUDPPort());