bool CAICHHashSet::LoadHashSet()
{
if (m_eStatus != AICH_HASHSETCOMPLETE) {
wxFAIL;
return false;
}
if ( !m_pHashTree.m_bHashValid || m_pHashTree.m_nDataSize != m_pOwner->GetFileSize() || m_pHashTree.m_nDataSize == 0) {
wxFAIL;
return false;
}
wxString fullpath = theApp->ConfigDir + KNOWN2_MET_FILENAME;
CFile file(fullpath, CFile::read);
if (!file.IsOpened()) {
if (wxFileExists(fullpath)) {
wxString strError(wxT("Failed to load ") KNOWN2_MET_FILENAME wxT(" file"));
AddDebugLogLineM( true, logSHAHashSet, strError);
}
return false;
}
try {
uint8 header = file.ReadUInt8();
if (header != KNOWN2_MET_VERSION) {
AddDebugLogLineM( true, logSHAHashSet, wxT("Loading failed: Current file is not a met-file!"));
return false;
}
CAICHHash CurrentHash;
uint64 nExistingSize = file.GetLength();
uint32 nHashCount;
while (file.GetPosition() < nExistingSize) {
CurrentHash.Read(&file);
if (m_pHashTree.m_Hash == CurrentHash) {
// found Hashset
uint32 nExpectedCount = (PARTSIZE/EMBLOCKSIZE + ((PARTSIZE % EMBLOCKSIZE != 0)? 1 : 0)) * (m_pHashTree.m_nDataSize/PARTSIZE);
if (m_pHashTree.m_nDataSize % PARTSIZE != 0) {
nExpectedCount += (m_pHashTree.m_nDataSize % PARTSIZE)/EMBLOCKSIZE + (((m_pHashTree.m_nDataSize % PARTSIZE) % EMBLOCKSIZE != 0)? 1 : 0);
}
nHashCount = file.ReadUInt32();
if (nHashCount != nExpectedCount) {
AddDebugLogLineM( true, logSHAHashSet, wxT("Failed to load HashSet: Available Hashs and expected hashcount differ!"));
return false;
}
if (!m_pHashTree.LoadLowestLevelHashs(&file)) {
AddDebugLogLineM( true, logSHAHashSet, wxT("Failed to load HashSet: LoadLowestLevelHashs failed!"));
return false;
}
if (!ReCalculateHash(false)) {
AddDebugLogLineM( true, logSHAHashSet, wxT("Failed to load HashSet: Calculating loaded hashs failed!"));
return false;
}
if (CurrentHash != m_pHashTree.m_Hash) {
AddDebugLogLineM( true, logSHAHashSet, wxT("Failed to load HashSet: Calculated Masterhash differs from given Masterhash - hashset corrupt!"));
return false;
}
return true;
}
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);
}
AddDebugLogLineM( true, logSHAHashSet, wxT("Failed to load HashSet: HashSet not found!"));
} catch (const CSafeIOException& e) {
AddDebugLogLineM(true, logSHAHashSet, wxT("IO error while loading AICH HashSet: ") + e.what());
}
return false;
}
bool CAICHRecoveryHashSet::LoadHashSet(){
if (m_eStatus != AICH_HASHSETCOMPLETE){
ASSERT( false );
return false;
}
if ( !m_pHashTree.m_bHashValid || m_pHashTree.m_nDataSize != m_pOwner->GetFileSize() || m_pHashTree.m_nDataSize == 0){
ASSERT( false );
return false;
}
CString fullpath = thePrefs.GetMuleDirectory(EMULE_CONFIGDIR);
fullpath.Append(KNOWN2_MET_FILENAME);
CSafeFile file;
CFileException fexp;
if (!file.Open(fullpath,CFile::modeCreate|CFile::modeRead|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());
}
CAICHHash CurrentHash;
uint32 nExistingSize = (UINT)file.GetLength();
uint32 nHashCount;
while (file.GetPosition() < nExistingSize){
CurrentHash.Read(&file);
if (m_pHashTree.m_Hash == CurrentHash){
// found Hashset
uint32 nExpectedCount = (uint32)((PARTSIZE/EMBLOCKSIZE + ((PARTSIZE % EMBLOCKSIZE != 0)? 1 : 0)) * (m_pHashTree.m_nDataSize/PARTSIZE));
if (m_pHashTree.m_nDataSize % PARTSIZE != 0)
nExpectedCount += (uint32)((m_pHashTree.m_nDataSize % PARTSIZE)/EMBLOCKSIZE + (((m_pHashTree.m_nDataSize % PARTSIZE) % EMBLOCKSIZE != 0)? 1 : 0));
nHashCount = file.ReadUInt32();
if (nHashCount != nExpectedCount){
theApp.QueueDebugLogLine(true, _T("Failed to load HashSet: Available Hashs and expected hashcount differ!"));
return false;
}
//uint32 dbgPos = file.GetPosition();
if (!m_pHashTree.LoadLowestLevelHashs(&file)){
theApp.QueueDebugLogLine(true, _T("Failed to load HashSet: LoadLowestLevelHashs failed!"));
return false;
}
//uint32 dbgHashRead = (file.GetPosition()-dbgPos)/HASHSIZE;
if (!ReCalculateHash(false)){
theApp.QueueDebugLogLine(true, _T("Failed to load HashSet: Calculating loaded hashs failed!"));
return false;
}
if (CurrentHash != m_pHashTree.m_Hash){
theApp.QueueDebugLogLine(true, _T("Failed to load HashSet: Calculated Masterhash differs from given Masterhash - hashset corrupt!"));
return false;
}
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);
}
theApp.QueueDebugLogLine(true, _T("Failed to load HashSet: HashSet not found!"));
}
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;
}
// 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;
}
