bool CAICHHashSet::CreatePartRecoveryData(uint64 nPartStartPos, CFileDataIO* fileDataOut, bool bDbgDontLoad)
{
wxASSERT( m_pOwner );
if (m_pOwner->IsPartFile() || m_eStatus != AICH_HASHSETCOMPLETE) {
wxFAIL;
return false;
}
if (m_pHashTree.m_nDataSize <= EMBLOCKSIZE) {
wxFAIL;
return false;
}
if (!bDbgDontLoad) {
if (!LoadHashSet()) {
AddDebugLogLineN(logSHAHashSet,
CFormat(wxT("Created RecoveryData error: failed to load hashset. File: %s")) % m_pOwner->GetFileName());
SetStatus(AICH_ERROR);
return false;
}
}
bool bResult;
uint8 nLevel = 0;
uint32 nPartSize = min<uint64>(PARTSIZE, m_pOwner->GetFileSize()-nPartStartPos);
m_pHashTree.FindHash(nPartStartPos, nPartSize,&nLevel);
uint16 nHashsToWrite = (nLevel-1) + nPartSize/EMBLOCKSIZE + ((nPartSize % EMBLOCKSIZE != 0 )? 1:0);
const bool bUse32BitIdentifier = m_pOwner->IsLargeFile();
if (bUse32BitIdentifier) {
fileDataOut->WriteUInt16(0); // no 16bit hashs to write
}
fileDataOut->WriteUInt16(nHashsToWrite);
uint64 nCheckFilePos = fileDataOut->GetPosition();
if (m_pHashTree.CreatePartRecoveryData(nPartStartPos, nPartSize, fileDataOut, 0, bUse32BitIdentifier)) {
if (nHashsToWrite*(HASHSIZE+(bUse32BitIdentifier? 4u:2u)) != fileDataOut->GetPosition() - nCheckFilePos) {
wxFAIL;
AddDebugLogLineN( logSHAHashSet,
CFormat(wxT("Created RecoveryData has wrong length. File: %s")) % m_pOwner->GetFileName() );
bResult = false;
SetStatus(AICH_ERROR);
} else {
bResult = true;
}
} else {
AddDebugLogLineN(logSHAHashSet,
CFormat(wxT("Failed to create RecoveryData for '%s'")) % m_pOwner->GetFileName());
bResult = false;
SetStatus(AICH_ERROR);
}
if (!bUse32BitIdentifier) {
fileDataOut->WriteUInt16(0); // no 32bit hashs to write
}
if (!bDbgDontLoad) {
FreeHashSet();
}
return bResult;
}
bool CAICHRecoveryHashSet::CreatePartRecoveryData(uint64 nPartStartPos, CFileDataIO* fileDataOut, bool bDbgDontLoad){
ASSERT( m_pOwner );
if (m_pOwner->IsPartFile() || m_eStatus != AICH_HASHSETCOMPLETE){
ASSERT( false );
return false;
}
if (m_pHashTree.m_nDataSize <= EMBLOCKSIZE){
ASSERT( false );
return false;
}
if (!bDbgDontLoad){
if (!LoadHashSet()){
theApp.QueueDebugLogLine(/*DLP_VERYHIGH,*/ false, _T("Created RecoveryData error: failed to load hashset (file: %s)"), m_pOwner->GetFileName() );
SetStatus(AICH_ERROR);
return false;
}
}
bool bResult;
uint8 nLevel = 0;
uint32 nPartSize = (uint32)min(PARTSIZE, (uint64)m_pOwner->GetFileSize()-nPartStartPos);
m_pHashTree.FindHash(nPartStartPos, nPartSize,&nLevel);
uint16 nHashsToWrite = (uint16)((nLevel-1) + nPartSize/EMBLOCKSIZE + ((nPartSize % EMBLOCKSIZE != 0 )? 1:0));
const bool bUse32BitIdentifier = m_pOwner->IsLargeFile();
if (bUse32BitIdentifier)
fileDataOut->WriteUInt16(0); // no 16bit hashs to write
fileDataOut->WriteUInt16(nHashsToWrite);
uint32 nCheckFilePos = (UINT)fileDataOut->GetPosition();
if (m_pHashTree.CreatePartRecoveryData(nPartStartPos, nPartSize, fileDataOut, 0, bUse32BitIdentifier)){
if (nHashsToWrite*(HASHSIZE+(bUse32BitIdentifier? 4:2)) != fileDataOut->GetPosition() - nCheckFilePos){
ASSERT( false );
theApp.QueueDebugLogLine(/*DLP_VERYHIGH,*/ false, _T("Created RecoveryData has wrong length (file: %s)"), m_pOwner->GetFileName() );
bResult = false;
SetStatus(AICH_ERROR);
}
else
bResult = true;
}
else{
theApp.QueueDebugLogLine(/*DLP_VERYHIGH,*/ false, _T("Failed to create RecoveryData for %s"), m_pOwner->GetFileName() );
bResult = false;
SetStatus(AICH_ERROR);
}
if (!bUse32BitIdentifier)
fileDataOut->WriteUInt16(0); // no 32bit hashs to write
if (!bDbgDontLoad){
FreeHashSet();
}
return bResult;
}
void CAICHRecoveryHashSet::UntrustedHashReceived(const CAICHHash& Hash, uint32 dwFromIP){
switch(GetStatus()){
case AICH_EMPTY:
case AICH_UNTRUSTED:
case AICH_TRUSTED:
break;
default:
return;
}
bool bFound = false;
bool bAdded = false;
for (int i = 0; i < m_aUntrustedHashs.GetCount(); i++){
if (m_aUntrustedHashs[i].m_Hash == Hash){
bAdded = m_aUntrustedHashs[i].AddSigningIP(dwFromIP, false);
bFound = true;
break;
}
}
if (!bFound)
{
for (int i = 0; i < m_aUntrustedHashs.GetCount(); i++)
{
if (!m_aUntrustedHashs[i].AddSigningIP(dwFromIP, true))
{
AddDebugLogLine(DLP_LOW, false, _T("Received different AICH hashs for file %s from IP/20 %s, ignored"), (m_pOwner != NULL) ? m_pOwner->GetFileName() : _T(""), dwFromIP);
// nothing changed, so we can return early without any rechecks
return;
}
}
bAdded = true;
CAICHUntrustedHash uhToAdd;
uhToAdd.m_Hash = Hash;
uhToAdd.AddSigningIP(dwFromIP, false);
m_aUntrustedHashs.Add(uhToAdd);
}
uint32 nSigningIPsTotal = 0; // unique clients who send us a hash
int nMostTrustedPos = (-1); // the hash which most clients send us
uint32 nMostTrustedIPs = 0;
for (uint32 i = 0; i < (uint32)m_aUntrustedHashs.GetCount(); i++){
nSigningIPsTotal += m_aUntrustedHashs[i].m_adwIpsSigning.GetCount();
if ((uint32)m_aUntrustedHashs[i].m_adwIpsSigning.GetCount() > nMostTrustedIPs){
nMostTrustedIPs = m_aUntrustedHashs[i].m_adwIpsSigning.GetCount();
nMostTrustedPos = i;
}
}
if (nMostTrustedPos == (-1) || nSigningIPsTotal == 0){
ASSERT( false );
return;
}
// the check if we trust any hash
if ( thePrefs.IsTrustingEveryHash() ||
(nMostTrustedIPs >= MINUNIQUEIPS_TOTRUST && (100 * nMostTrustedIPs)/nSigningIPsTotal >= MINPERCENTAGE_TOTRUST)){
//trusted
//theApp.QueueDebugLogLine(false, _T("AICH Hash received: %s (%sadded), We have now %u hash from %u unique IPs. We trust the Hash %s from %u clients (%u%%). Added IP:%s, file: %s")
//, Hash.GetString(), bAdded? _T(""):_T("not "), m_aUntrustedHashs.GetCount(), nSigningIPsTotal, m_aUntrustedHashs[nMostTrustedPos].m_Hash.GetString()
//, nMostTrustedIPs, (100 * nMostTrustedIPs)/nSigningIPsTotal, ipstr(dwFromIP & 0x00F0FFFF), m_pOwner->GetFileName());
SetStatus(AICH_TRUSTED);
if (!HasValidMasterHash() || GetMasterHash() != m_aUntrustedHashs[nMostTrustedPos].m_Hash){
SetMasterHash(m_aUntrustedHashs[nMostTrustedPos].m_Hash, AICH_TRUSTED);
FreeHashSet();
}
}
else{
// untrusted
//theApp.QueueDebugLogLine(false, _T("AICH Hash received: %s (%sadded), We have now %u hash from %u unique IPs. Best Hash (%s) is from %u clients (%u%%) - but we dont trust it yet. Added IP:%s, file: %s")
// , Hash.GetString(), bAdded? _T(""):_T("not "), m_aUntrustedHashs.GetCount(), nSigningIPsTotal, m_aUntrustedHashs[nMostTrustedPos].m_Hash.GetString()
// , nMostTrustedIPs, (100 * nMostTrustedIPs)/nSigningIPsTotal, ipstr(dwFromIP & 0x00F0FFFF), m_pOwner->GetFileName());
SetStatus(AICH_UNTRUSTED);
if (!HasValidMasterHash() || GetMasterHash() != m_aUntrustedHashs[nMostTrustedPos].m_Hash){
SetMasterHash(m_aUntrustedHashs[nMostTrustedPos].m_Hash, AICH_UNTRUSTED);
FreeHashSet();
}
}
}
// this function is only allowed to be called right after successfully calculating the hashset (!)
// will delete the hashset, after saving to free the memory
bool CAICHRecoveryHashSet::SaveHashSet(){
if (m_eStatus != AICH_HASHSETCOMPLETE){
ASSERT( false );
return false;
}
if ( !m_pHashTree.m_bHashValid || m_pHashTree.m_nDataSize != m_pOwner->GetFileSize()){
ASSERT( false );
return false;
}
CSingleLock lockKnown2Met(&m_mutKnown2File, false);
if (!lockKnown2Met.Lock(5000)){
return false;
}
CString fullpath = thePrefs.GetMuleDirectory(EMULE_CONFIGDIR);
fullpath.Append(KNOWN2_MET_FILENAME);
CSafeFile file;
CFileException fexp;
if (!file.Open(fullpath,CFile::modeCreate|CFile::modeReadWrite|CFile::modeNoTruncate|CFile::osSequentialScan|CFile::typeBinary|CFile::shareDenyNone, &fexp)){
if (fexp.m_cause != CFileException::fileNotFound){
CString strError(_T("Failed to load ") KNOWN2_MET_FILENAME _T(" file"));
TCHAR szError[MAX_CFEXP_ERRORMSG];
if (fexp.GetErrorMessage(szError, ARRSIZE(szError))){
strError += _T(" - ");
strError += szError;
}
theApp.QueueLogLine(true, _T("%s"), strError);
}
return false;
}
try {
//setvbuf(file.m_pStream, NULL, _IOFBF, 16384);
uint8 header = file.ReadUInt8();
if (header != KNOWN2_MET_VERSION){
AfxThrowFileException(CFileException::endOfFile, 0, file.GetFileName());
}
// first we check if the hashset we want to write is already stored
if (m_liAICHHashsStored.Find(m_pHashTree.m_Hash) != NULL)
{
theApp.QueueDebugLogLine(false, _T("AICH Hashset to write should be already present in known2.met - %s"), m_pHashTree.m_Hash.GetString());
// this hashset if already available, no need to save it again
return true;
}
/*CAICHHash CurrentHash;
while (file.GetPosition() < nExistingSize){
CurrentHash.Read(&file);
if (m_pHashTree.m_Hash == CurrentHash){
// this hashset if already available, no need to save it again
return true;
}
nHashCount = file.ReadUInt32();
if (file.GetPosition() + nHashCount*HASHSIZE > nExistingSize){
AfxThrowFileException(CFileException::endOfFile, 0, file.GetFileName());
}
// skip the rest of this hashset
file.Seek(nHashCount*HASHSIZE, CFile::current);
}*/
// write hashset
uint32 nExistingSize = (UINT)file.GetLength();
file.SeekToEnd();
m_pHashTree.m_Hash.Write(&file);
uint32 nHashCount = (uint32)((PARTSIZE/EMBLOCKSIZE + ((PARTSIZE % EMBLOCKSIZE != 0)? 1 : 0)) * (m_pHashTree.m_nDataSize/PARTSIZE));
if (m_pHashTree.m_nDataSize % PARTSIZE != 0)
nHashCount += (uint32)((m_pHashTree.m_nDataSize % PARTSIZE)/EMBLOCKSIZE + (((m_pHashTree.m_nDataSize % PARTSIZE) % EMBLOCKSIZE != 0)? 1 : 0));
file.WriteUInt32(nHashCount);
if (!m_pHashTree.WriteLowestLevelHashs(&file, 0, true, true)){
// thats bad... really
file.SetLength(nExistingSize);
theApp.QueueDebugLogLine(true, _T("Failed to save HashSet: WriteLowestLevelHashs() failed!"));
return false;
}
if (file.GetLength() != nExistingSize + (nHashCount+1)*HASHSIZE + 4){
// thats even worse
file.SetLength(nExistingSize);
theApp.QueueDebugLogLine(true, _T("Failed to save HashSet: Calculated and real size of hashset differ!"));
return false;
}
CAICHRecoveryHashSet::AddStoredAICHHash(m_pHashTree.m_Hash);
theApp.QueueDebugLogLine(false, _T("Successfully saved eMuleAC Hashset, %u Hashs + 1 Masterhash written"), nHashCount);
file.Flush();
file.Close();
}
catch(CFileException* error){
if (error->m_cause == CFileException::endOfFile)
theApp.QueueLogLine(true, GetResString(IDS_ERR_MET_BAD), KNOWN2_MET_FILENAME);
else{
TCHAR buffer[MAX_CFEXP_ERRORMSG];
error->GetErrorMessage(buffer, ARRSIZE(buffer));
theApp.QueueLogLine(true,GetResString(IDS_ERR_SERVERMET_UNKNOWN),buffer);
}
error->Delete();
return false;
}
FreeHashSet();
return true;
}
CAICHRecoveryHashSet::~CAICHRecoveryHashSet(void)
{
FreeHashSet();
}
void CAICHHashSet::UntrustedHashReceived(const CAICHHash& Hash, uint32 dwFromIP)
{
switch(GetStatus()) {
case AICH_EMPTY:
case AICH_UNTRUSTED:
case AICH_TRUSTED:
break;
default:
return;
}
bool bFound = false;
bool bAdded = false;
for (uint32 i = 0; i < m_aUntrustedHashs.size(); ++i) {
if (m_aUntrustedHashs[i].m_Hash == Hash) {
bAdded = m_aUntrustedHashs[i].AddSigningIP(dwFromIP);
bFound = true;
break;
}
}
if (!bFound) {
bAdded = true;
CAICHUntrustedHash uhToAdd;
uhToAdd.m_Hash = Hash;
uhToAdd.AddSigningIP(dwFromIP);
m_aUntrustedHashs.push_back(uhToAdd);
}
uint32 nSigningIPsTotal = 0; // unique clients who send us a hash
int nMostTrustedPos = (-1); // the hash which most clients send us
uint32 nMostTrustedIPs = 0;
for (uint32 i = 0; i < (uint32)m_aUntrustedHashs.size(); ++i) {
nSigningIPsTotal += m_aUntrustedHashs[i].m_adwIpsSigning.size();
if ((uint32)m_aUntrustedHashs[i].m_adwIpsSigning.size() > nMostTrustedIPs) {
nMostTrustedIPs = m_aUntrustedHashs[i].m_adwIpsSigning.size();
nMostTrustedPos = i;
}
}
if (nMostTrustedPos == (-1) || nSigningIPsTotal == 0) {
wxFAIL;
return;
}
// the check if we trust any hash
if ( thePrefs::IsTrustingEveryHash() ||
(nMostTrustedIPs >= MINUNIQUEIPS_TOTRUST && (100 * nMostTrustedIPs)/nSigningIPsTotal >= MINPERCENTAGE_TOTRUST)) {
//trusted
AddDebugLogLineM(false, logSHAHashSet,
CFormat(wxT("AICH Hash received (%sadded), We have now %u hash(es) from %u unique IP(s). ")
wxT("We trust the Hash %s from %u client(s) (%u%%). File: %s"))
% (bAdded ? wxT("") : wxT("not "))
% m_aUntrustedHashs.size()
% nSigningIPsTotal
% m_aUntrustedHashs[nMostTrustedPos].m_Hash.GetString()
% nMostTrustedIPs
% ((100 * nMostTrustedIPs) / nSigningIPsTotal)
% m_pOwner->GetFileName());
SetStatus(AICH_TRUSTED);
if (!HasValidMasterHash() || GetMasterHash() != m_aUntrustedHashs[nMostTrustedPos].m_Hash) {
SetMasterHash(m_aUntrustedHashs[nMostTrustedPos].m_Hash, AICH_TRUSTED);
FreeHashSet();
}
} else {
// untrusted
AddDebugLogLineM(false, logSHAHashSet,
CFormat(wxT("AICH Hash received (%sadded), We have now %u hash(es) from %u unique IP(s). ")
wxT("Best Hash %s from %u clients (%u%%) - but we dont trust it yet. File: %s"))
% (bAdded ? wxT(""): wxT("not "))
% m_aUntrustedHashs.size()
% nSigningIPsTotal
% m_aUntrustedHashs[nMostTrustedPos].m_Hash.GetString()
% nMostTrustedIPs
% ((100 * nMostTrustedIPs) / nSigningIPsTotal)
% m_pOwner->GetFileName());
SetStatus(AICH_UNTRUSTED);
if (!HasValidMasterHash() || GetMasterHash() != m_aUntrustedHashs[nMostTrustedPos].m_Hash) {
SetMasterHash(m_aUntrustedHashs[nMostTrustedPos].m_Hash, AICH_UNTRUSTED);
FreeHashSet();
}
}
}
// this function is only allowed to be called right after successfully calculating the hashset (!)
// will delete the hashset, after saving to free the memory
bool CAICHHashSet::SaveHashSet()
{
if (m_eStatus != AICH_HASHSETCOMPLETE) {
wxFAIL;
return false;
}
if ( !m_pHashTree.m_bHashValid || m_pHashTree.m_nDataSize != m_pOwner->GetFileSize()) {
wxFAIL;
return false;
}
try {
const wxString fullpath = theApp->ConfigDir + KNOWN2_MET_FILENAME;
const bool exists = wxFile::Exists(fullpath);
CFile file(fullpath, exists ? CFile::read_write : CFile::write);
if (!file.IsOpened()) {
AddDebugLogLineM( true, logSHAHashSet, wxT("Failed to save HashSet: opening met file failed!"));
return false;
}
uint64 nExistingSize = file.GetLength();
if (nExistingSize) {
uint8 header = file.ReadUInt8();
if (header != KNOWN2_MET_VERSION) {
AddDebugLogLineM( true, logSHAHashSet, wxT("Saving failed: Current file is not a met-file!"));
return false;
}
AddDebugLogLineM( false, logSHAHashSet, wxString::Format(wxT("Met file is version 0x%2.2x."),header));
} else {
file.WriteUInt8(KNOWN2_MET_VERSION);
// Update the recorded size, in order for the sanity check below to work.
nExistingSize += 1;
}
// first we check if the hashset we want to write is already stored
CAICHHash CurrentHash;
while (file.GetPosition() < nExistingSize) {
CurrentHash.Read(&file);
if (m_pHashTree.m_Hash == CurrentHash) {
// this hashset if already available, no need to save it again
return true;
}
uint32 nHashCount = file.ReadUInt32();
if (file.GetPosition() + nHashCount*HASHSIZE > nExistingSize) {
AddDebugLogLineM( true, logSHAHashSet, wxT("Saving failed: File contains fewer entries than specified!"));
return false;
}
// skip the rest of this hashset
file.Seek(nHashCount*HASHSIZE, wxFromCurrent);
}
// write hashset
m_pHashTree.m_Hash.Write(&file);
uint32 nHashCount = (PARTSIZE/EMBLOCKSIZE + ((PARTSIZE % EMBLOCKSIZE != 0)? 1 : 0)) * (m_pHashTree.m_nDataSize/PARTSIZE);
if (m_pHashTree.m_nDataSize % PARTSIZE != 0) {
nHashCount += (m_pHashTree.m_nDataSize % PARTSIZE)/EMBLOCKSIZE + (((m_pHashTree.m_nDataSize % PARTSIZE) % EMBLOCKSIZE != 0)? 1 : 0);
}
file.WriteUInt32(nHashCount);
if (!m_pHashTree.WriteLowestLevelHashs(&file, 0, true, true)) {
// thats bad... really
file.SetLength(nExistingSize);
AddDebugLogLineM( true, logSHAHashSet, wxT("Failed to save HashSet: WriteLowestLevelHashs() failed!"));
return false;
}
if (file.GetLength() != nExistingSize + (nHashCount+1)*HASHSIZE + 4) {
// thats even worse
file.SetLength(nExistingSize);
AddDebugLogLineM( true, logSHAHashSet, wxT("Failed to save HashSet: Calculated and real size of hashset differ!"));
return false;
}
AddDebugLogLineM( false, logSHAHashSet, wxString::Format(wxT("Sucessfully saved eMuleAC Hashset, %u Hashs + 1 Masterhash written"), nHashCount));
} catch (const CSafeIOException& e) {
AddDebugLogLineM(true, logSHAHashSet, wxT("IO error while saving AICH HashSet: ") + e.what());
return false;
}
FreeHashSet();
return true;
}
CAICHHashSet::~CAICHHashSet(void)
{
FreeHashSet();
}
