STDMETHODIMP_(HANDLE) CDb3Mmap::FindLastEvent(MCONTACT contactID)
{
DBCachedContact *cc;
DWORD ofsContact = GetContactOffset(contactID, &cc);
mir_cslock lck(m_csDbAccess);
DBContact *dbc = (DBContact*)DBRead(ofsContact, sizeof(DBContact), NULL);
if (dbc->signature != DBCONTACT_SIGNATURE)
return NULL;
if (!cc || !cc->IsSub())
return HANDLE(dbc->ofsLastEvent);
if ((cc = m_cache->GetCachedContact(cc->parentID)) == NULL)
return NULL;
dbc = (DBContact*)DBRead(cc->dwDriverData, sizeof(DBContact), NULL);
if (dbc->signature != DBCONTACT_SIGNATURE)
return NULL;
for (DWORD dwOffset = dbc->ofsLastEvent; dwOffset != 0;) {
DBEvent *dbe = (DBEvent*)DBRead(dwOffset, sizeof(DBEvent), NULL);
if (dbe->signature != DBEVENT_SIGNATURE)
return NULL;
if (dbe->contactID == contactID)
return HANDLE(dwOffset);
dwOffset = dbe->ofsPrev;
}
return NULL;
}
STDMETHODIMP_(MEVENT) CDb3Mmap::FindLastEvent(MCONTACT contactID)
{
DBCachedContact *cc;
DWORD ofsContact = GetContactOffset(contactID, &cc);
mir_cslock lck(m_csDbAccess);
DBContact *dbc = (DBContact*)DBRead(ofsContact, nullptr);
if (dbc->signature != DBCONTACT_SIGNATURE)
return 0;
if (!cc || !cc->IsSub())
return MEVENT(dbc->ofsLastEvent);
if ((cc = m_cache->GetCachedContact(cc->parentID)) == nullptr)
return 0;
dbc = (DBContact*)DBRead(cc->dwOfsContact, nullptr);
if (dbc->signature != DBCONTACT_SIGNATURE)
return 0;
for (DWORD dwOffset = dbc->ofsLastEvent; dwOffset != 0;) {
DBEvent *dbe = AdaptEvent(dwOffset, contactID);
if (dbe->signature != DBEVENT_SIGNATURE)
return 0;
if (dbe->contactID == contactID)
return MEVENT(dwOffset);
dwOffset = dbe->ofsPrev;
}
return 0;
}
STDMETHODIMP_(BOOL) CDb3Mmap::EnumContactSettings(MCONTACT contactID, DBCONTACTENUMSETTINGS* dbces)
{
if (!dbces->szModule)
return -1;
mir_cslock lck(m_csDbAccess);
DWORD ofsContact = GetContactOffset(contactID);
if (ofsContact == 0)
return -1;
DBContact *dbc = (DBContact*)DBRead(ofsContact, NULL);
if (dbc->signature != DBCONTACT_SIGNATURE)
return -1;
DWORD ofsModuleName = GetModuleNameOfs(dbces->szModule);
dbces->ofsSettings = GetSettingsGroupOfsByModuleNameOfs(dbc, ofsModuleName);
if (!dbces->ofsSettings)
return -1;
DWORD ofsBlobPtr = dbces->ofsSettings + offsetof(DBContactSettings, blob);
int bytesRemaining;
PBYTE pBlob = (PBYTE)DBRead(ofsBlobPtr, &bytesRemaining);
if (pBlob[0] == 0)
return -1;
int result = 0;
while (pBlob[0]) {
NeedBytes(1);
NeedBytes(1 + pBlob[0]);
char szSetting[256];
memcpy(szSetting, pBlob + 1, pBlob[0]); szSetting[pBlob[0]] = 0;
result = (dbces->pfnEnumProc)(szSetting, dbces->lParam);
MoveAlong(1 + pBlob[0]);
NeedBytes(3);
MoveAlong(1 + GetSettingValueLength(pBlob));
NeedBytes(1);
}
return result;
}
STDMETHODIMP_(BOOL) CDb3Mmap::DeleteContactSetting(MCONTACT contactID, LPCSTR szModule, LPCSTR szSetting)
{
if (!szModule || !szSetting)
return 1;
// the db format can't tolerate more than 255 bytes of space (incl. null) for settings+module name
int settingNameLen = (int)mir_strlen(szSetting);
int moduleNameLen = (int)mir_strlen(szModule);
if (settingNameLen > 0xFE) {
#ifdef _DEBUG
OutputDebugStringA("DeleteContactSetting() got a > 255 setting name length. \n");
#endif
return 1;
}
if (moduleNameLen > 0xFE) {
#ifdef _DEBUG
OutputDebugStringA("DeleteContactSetting() got a > 255 module name length. \n");
#endif
return 1;
}
MCONTACT saveContact = contactID;
{
mir_cslock lck(m_csDbAccess);
char *szCachedSettingName = m_cache->GetCachedSetting(szModule, szSetting, moduleNameLen, settingNameLen);
if (szCachedSettingName[-1] == 0) { // it's not a resident variable
DWORD ofsModuleName = GetModuleNameOfs(szModule);
DWORD ofsContact = GetContactOffset(contactID);
DBContact *dbc = (DBContact*)DBRead(ofsContact, NULL);
if (dbc->signature != DBCONTACT_SIGNATURE)
return 1;
// make sure the module group exists
DWORD ofsSettingsGroup = GetSettingsGroupOfsByModuleNameOfs(dbc, ofsModuleName);
if (ofsSettingsGroup == 0)
return 1;
// find if the setting exists
DWORD ofsBlobPtr = ofsSettingsGroup + offsetof(DBContactSettings, blob);
int bytesRemaining;
PBYTE pBlob = (PBYTE)DBRead(ofsBlobPtr, &bytesRemaining);
while (pBlob[0]) {
NeedBytes(settingNameLen + 1);
if (pBlob[0] == settingNameLen && !memcmp(pBlob + 1, szSetting, settingNameLen))
break;
NeedBytes(1);
MoveAlong(pBlob[0] + 1);
NeedBytes(3);
MoveAlong(1 + GetSettingValueLength(pBlob));
NeedBytes(1);
}
if (!pBlob[0]) //setting didn't exist
return 1;
// bin it
MoveAlong(1 + settingNameLen);
NeedBytes(3);
int nameLen = 1 + settingNameLen;
int valLen = 1 + GetSettingValueLength(pBlob);
DWORD ofsSettingToCut = ofsBlobPtr - nameLen;
MoveAlong(valLen);
NeedBytes(1);
while (pBlob[0]) {
MoveAlong(pBlob[0] + 1);
NeedBytes(3);
MoveAlong(1 + GetSettingValueLength(pBlob));
NeedBytes(1);
}
DBMoveChunk(ofsSettingToCut, ofsSettingToCut + nameLen + valLen, ofsBlobPtr + 1 - ofsSettingToCut);
DBFlush(1);
}
m_cache->GetCachedValuePtr(saveContact, szCachedSettingName, -1);
}
// notify
DBCONTACTWRITESETTING dbcws = { 0 };
dbcws.szModule = szModule;
dbcws.szSetting = szSetting;
dbcws.value.type = DBVT_DELETED;
NotifyEventHooks(hSettingChangeEvent, saveContact, (LPARAM)&dbcws);
return 0;
}
int CDb3Mmap::GetContactSettingWorker(MCONTACT contactID, LPCSTR szModule, LPCSTR szSetting, DBVARIANT *dbv, int isStatic)
{
if (szSetting == NULL || szModule == NULL)
return 1;
// the db format can't tolerate more than 255 bytes of space (incl. null) for settings+module name
int settingNameLen = (int)mir_strlen(szSetting);
int moduleNameLen = (int)mir_strlen(szModule);
if (settingNameLen > 0xFE) {
#ifdef _DEBUG
OutputDebugStringA("GetContactSettingWorker() got a > 255 setting name length. \n");
#endif
return 1;
}
if (moduleNameLen > 0xFE) {
#ifdef _DEBUG
OutputDebugStringA("GetContactSettingWorker() got a > 255 module name length. \n");
#endif
return 1;
}
mir_cslock lck(m_csDbAccess);
LBL_Seek:
char *szCachedSettingName = m_cache->GetCachedSetting(szModule, szSetting, moduleNameLen, settingNameLen);
log3("get [%08p] %s (%p)", hContact, szCachedSettingName, szCachedSettingName);
DBVARIANT *pCachedValue = m_cache->GetCachedValuePtr(contactID, szCachedSettingName, 0);
if (pCachedValue != NULL) {
if (pCachedValue->type == DBVT_ASCIIZ || pCachedValue->type == DBVT_UTF8) {
int cbOrigLen = dbv->cchVal;
char *cbOrigPtr = dbv->pszVal;
memcpy(dbv, pCachedValue, sizeof(DBVARIANT));
if (isStatic) {
int cbLen = 0;
if (pCachedValue->pszVal != NULL)
cbLen = (int)mir_strlen(pCachedValue->pszVal);
cbOrigLen--;
dbv->pszVal = cbOrigPtr;
if (cbLen < cbOrigLen)
cbOrigLen = cbLen;
memcpy(dbv->pszVal, pCachedValue->pszVal, cbOrigLen);
dbv->pszVal[cbOrigLen] = 0;
dbv->cchVal = cbLen;
}
else {
dbv->pszVal = (char*)mir_alloc(mir_strlen(pCachedValue->pszVal) + 1);
mir_strcpy(dbv->pszVal, pCachedValue->pszVal);
}
}
else memcpy(dbv, pCachedValue, sizeof(DBVARIANT));
log2("get cached %s (%p)", printVariant(dbv), pCachedValue);
return (pCachedValue->type == DBVT_DELETED) ? 1 : 0;
}
// never look db for the resident variable
if (szCachedSettingName[-1] != 0)
return 1;
DBCachedContact *cc;
DWORD ofsContact = GetContactOffset(contactID, &cc);
DWORD ofsModuleName = GetModuleNameOfs(szModule);
DBContact dbc = *(DBContact*)DBRead(ofsContact, NULL);
if (dbc.signature != DBCONTACT_SIGNATURE)
return 1;
DWORD ofsSettingsGroup = GetSettingsGroupOfsByModuleNameOfs(&dbc, ofsModuleName);
if (ofsSettingsGroup) {
int bytesRemaining;
unsigned varLen;
DWORD ofsBlobPtr = ofsSettingsGroup + offsetof(DBContactSettings, blob);
PBYTE pBlob = DBRead(ofsBlobPtr, &bytesRemaining);
while (pBlob[0]) {
NeedBytes(1 + settingNameLen);
if (pBlob[0] == settingNameLen && !memcmp(pBlob + 1, szSetting, settingNameLen)) {
MoveAlong(1 + settingNameLen);
NeedBytes(5);
if (isStatic && (pBlob[0] & DBVTF_VARIABLELENGTH) && VLT(dbv->type) != VLT(pBlob[0]))
return 1;
BYTE iType = dbv->type = pBlob[0];
switch (iType) {
case DBVT_DELETED: /* this setting is deleted */
dbv->type = DBVT_DELETED;
return 2;
case DBVT_BYTE: dbv->bVal = pBlob[1]; break;
case DBVT_WORD: memmove(&(dbv->wVal), (PWORD)(pBlob + 1), 2); break;
case DBVT_DWORD: memmove(&(dbv->dVal), (PDWORD)(pBlob + 1), 4); break;
case DBVT_UTF8:
case DBVT_ASCIIZ:
varLen = *(PWORD)(pBlob + 1);
NeedBytes(int(3 + varLen));
if (isStatic) {
dbv->cchVal--;
if (varLen < dbv->cchVal)
dbv->cchVal = varLen;
memmove(dbv->pszVal, pBlob + 3, dbv->cchVal); // decode
dbv->pszVal[dbv->cchVal] = 0;
dbv->cchVal = varLen;
}
else {
dbv->pszVal = (char*)mir_alloc(1 + varLen);
memmove(dbv->pszVal, pBlob + 3, varLen);
dbv->pszVal[varLen] = 0;
}
break;
case DBVT_BLOB:
varLen = *(PWORD)(pBlob + 1);
NeedBytes(int(3 + varLen));
if (isStatic) {
if (varLen < dbv->cpbVal)
dbv->cpbVal = varLen;
memmove(dbv->pbVal, pBlob + 3, dbv->cpbVal);
}
else {
dbv->pbVal = (BYTE *)mir_alloc(varLen);
memmove(dbv->pbVal, pBlob + 3, varLen);
}
dbv->cpbVal = varLen;
break;
case DBVT_ENCRYPTED:
if (m_crypto == NULL)
return 1;
else {
varLen = *(PWORD)(pBlob + 1);
NeedBytes(int(3 + varLen));
size_t realLen;
ptrA decoded(m_crypto->decodeString(pBlob + 3, varLen, &realLen));
if (decoded == NULL)
return 1;
varLen = (WORD)realLen;
dbv->type = DBVT_UTF8;
if (isStatic) {
dbv->cchVal--;
if (varLen < dbv->cchVal)
dbv->cchVal = varLen;
memmove(dbv->pszVal, decoded, dbv->cchVal);
dbv->pszVal[dbv->cchVal] = 0;
dbv->cchVal = varLen;
}
else {
dbv->pszVal = (char*)mir_alloc(1 + varLen);
memmove(dbv->pszVal, decoded, varLen);
dbv->pszVal[varLen] = 0;
}
}
break;
}
/**** add to cache **********************/
if (iType != DBVT_BLOB && iType != DBVT_ENCRYPTED) {
DBVARIANT *pCachedValue = m_cache->GetCachedValuePtr(contactID, szCachedSettingName, 1);
if (pCachedValue != NULL) {
m_cache->SetCachedVariant(dbv, pCachedValue);
log3("set cached [%08p] %s (%p)", hContact, szCachedSettingName, pCachedValue);
}
}
return 0;
}
NeedBytes(1);
MoveAlong(pBlob[0] + 1);
NeedBytes(3);
MoveAlong(1 + GetSettingValueLength(pBlob));
NeedBytes(1);
}
}
// try to get the missing mc setting from the active sub
if (cc && cc->IsMeta() && ValidLookupName(szModule, szSetting)) {
if (contactID = db_mc_getDefault(contactID)) {
if (szModule = GetContactProto(contactID)) {
moduleNameLen = (int)mir_strlen(szModule);
goto LBL_Seek;
}
}
}
logg();
return 1;
}
STDMETHODIMP_(BOOL) CDb3Mmap::WriteContactSetting(MCONTACT contactID, DBCONTACTWRITESETTING *dbcws)
{
if (dbcws == NULL || dbcws->szSetting == NULL || dbcws->szModule == NULL || m_bReadOnly)
return 1;
// the db format can't tolerate more than 255 bytes of space (incl. null) for settings+module name
int settingNameLen = (int)mir_strlen(dbcws->szSetting);
int moduleNameLen = (int)mir_strlen(dbcws->szModule);
if (settingNameLen > 0xFE) {
#ifdef _DEBUG
OutputDebugStringA("WriteContactSetting() got a > 255 setting name length. \n");
#endif
return 1;
}
if (moduleNameLen > 0xFE) {
#ifdef _DEBUG
OutputDebugStringA("WriteContactSetting() got a > 255 module name length. \n");
#endif
return 1;
}
// used for notifications
DBCONTACTWRITESETTING dbcwNotif = *dbcws;
if (dbcwNotif.value.type == DBVT_WCHAR) {
if (dbcwNotif.value.pszVal != NULL) {
char* val = mir_utf8encodeW(dbcwNotif.value.pwszVal);
if (val == NULL)
return 1;
dbcwNotif.value.pszVal = (char*)alloca(mir_strlen(val) + 1);
mir_strcpy(dbcwNotif.value.pszVal, val);
mir_free(val);
dbcwNotif.value.type = DBVT_UTF8;
}
else return 1;
}
if (dbcwNotif.szModule == NULL || dbcwNotif.szSetting == NULL)
return 1;
DBCONTACTWRITESETTING dbcwWork = dbcwNotif;
mir_ptr<BYTE> pEncoded(NULL);
bool bIsEncrypted = false;
switch (dbcwWork.value.type) {
case DBVT_BYTE: case DBVT_WORD: case DBVT_DWORD:
break;
case DBVT_ASCIIZ: case DBVT_UTF8:
bIsEncrypted = m_bEncrypted || IsSettingEncrypted(dbcws->szModule, dbcws->szSetting);
LBL_WriteString:
if (dbcwWork.value.pszVal == NULL)
return 1;
dbcwWork.value.cchVal = (WORD)mir_strlen(dbcwWork.value.pszVal);
if (bIsEncrypted) {
size_t len;
BYTE *pResult = m_crypto->encodeString(dbcwWork.value.pszVal, &len);
if (pResult != NULL) {
pEncoded = dbcwWork.value.pbVal = pResult;
dbcwWork.value.cpbVal = (WORD)len;
dbcwWork.value.type = DBVT_ENCRYPTED;
}
}
break;
case DBVT_UNENCRYPTED:
dbcwNotif.value.type = dbcwWork.value.type = DBVT_UTF8;
goto LBL_WriteString;
case DBVT_BLOB: case DBVT_ENCRYPTED:
if (dbcwWork.value.pbVal == NULL)
return 1;
break;
default:
return 1;
}
mir_cslockfull lck(m_csDbAccess);
DWORD ofsBlobPtr, ofsContact = GetContactOffset(contactID);
if (ofsContact == 0) {
_ASSERT(false); // contact doesn't exist?
return 2;
}
char *szCachedSettingName = m_cache->GetCachedSetting(dbcwWork.szModule, dbcwWork.szSetting, moduleNameLen, settingNameLen);
log3("set [%08p] %s (%p)", hContact, szCachedSettingName, szCachedSettingName);
// we don't cache blobs and passwords
if (dbcwWork.value.type != DBVT_BLOB && dbcwWork.value.type != DBVT_ENCRYPTED && !bIsEncrypted) {
DBVARIANT *pCachedValue = m_cache->GetCachedValuePtr(contactID, szCachedSettingName, 1);
if (pCachedValue != NULL) {
bool bIsIdentical = false;
if (pCachedValue->type == dbcwWork.value.type) {
switch (dbcwWork.value.type) {
case DBVT_BYTE: bIsIdentical = pCachedValue->bVal == dbcwWork.value.bVal; break;
case DBVT_WORD: bIsIdentical = pCachedValue->wVal == dbcwWork.value.wVal; break;
case DBVT_DWORD: bIsIdentical = pCachedValue->dVal == dbcwWork.value.dVal; break;
case DBVT_UTF8:
case DBVT_ASCIIZ: bIsIdentical = mir_strcmp(pCachedValue->pszVal, dbcwWork.value.pszVal) == 0; break;
}
if (bIsIdentical)
return 0;
}
m_cache->SetCachedVariant(&dbcwWork.value, pCachedValue);
}
if (szCachedSettingName[-1] != 0) {
lck.unlock();
log2(" set resident as %s (%p)", printVariant(&dbcwWork.value), pCachedValue);
NotifyEventHooks(hSettingChangeEvent, contactID, (LPARAM)&dbcwWork);
return 0;
}
}
else m_cache->GetCachedValuePtr(contactID, szCachedSettingName, -1);
log1(" write database as %s", printVariant(&dbcwWork.value));
DWORD ofsModuleName = GetModuleNameOfs(dbcwWork.szModule);
DBContact dbc = *(DBContact*)DBRead(ofsContact, NULL);
if (dbc.signature != DBCONTACT_SIGNATURE)
return 1;
// make sure the module group exists
PBYTE pBlob;
int bytesRequired, bytesRemaining;
DBContactSettings dbcs;
DWORD ofsSettingsGroup = GetSettingsGroupOfsByModuleNameOfs(&dbc, ofsModuleName);
if (ofsSettingsGroup == 0) { //module group didn't exist - make it
switch (dbcwWork.value.type) {
case DBVT_ASCIIZ: case DBVT_UTF8:
bytesRequired = dbcwWork.value.cchVal + 2;
break;
case DBVT_BLOB: case DBVT_ENCRYPTED:
bytesRequired = dbcwWork.value.cpbVal + 2;
break;
default:
bytesRequired = dbcwWork.value.type;
}
bytesRequired += 2 + settingNameLen;
bytesRequired += (DB_SETTINGS_RESIZE_GRANULARITY - (bytesRequired % DB_SETTINGS_RESIZE_GRANULARITY)) % DB_SETTINGS_RESIZE_GRANULARITY;
ofsSettingsGroup = CreateNewSpace(bytesRequired + offsetof(DBContactSettings, blob));
dbcs.signature = DBCONTACTSETTINGS_SIGNATURE;
dbcs.ofsNext = dbc.ofsFirstSettings;
dbcs.ofsModuleName = ofsModuleName;
dbcs.cbBlob = bytesRequired;
dbcs.blob[0] = 0;
dbc.ofsFirstSettings = ofsSettingsGroup;
DBWrite(ofsContact, &dbc, sizeof(DBContact));
DBWrite(ofsSettingsGroup, &dbcs, sizeof(DBContactSettings));
ofsBlobPtr = ofsSettingsGroup + offsetof(DBContactSettings, blob);
pBlob = (PBYTE)DBRead(ofsBlobPtr, &bytesRemaining);
}
else {
dbcs = *(DBContactSettings*)DBRead(ofsSettingsGroup, &bytesRemaining);
// find if the setting exists
ofsBlobPtr = ofsSettingsGroup + offsetof(DBContactSettings, blob);
pBlob = (PBYTE)DBRead(ofsBlobPtr, &bytesRemaining);
while (pBlob[0]) {
NeedBytes(settingNameLen + 1);
if (pBlob[0] == settingNameLen && !memcmp(pBlob + 1, dbcwWork.szSetting, settingNameLen))
break;
NeedBytes(1);
MoveAlong(pBlob[0] + 1);
NeedBytes(3);
MoveAlong(1 + GetSettingValueLength(pBlob));
NeedBytes(1);
}
// setting already existed, and up to end of name is in cache
if (pBlob[0]) {
MoveAlong(1 + settingNameLen);
// if different type or variable length and length is different
NeedBytes(3);
if (pBlob[0] != dbcwWork.value.type ||
((pBlob[0] == DBVT_ASCIIZ || pBlob[0] == DBVT_UTF8) && *(PWORD)(pBlob + 1) != dbcwWork.value.cchVal) ||
((pBlob[0] == DBVT_BLOB || pBlob[0] == DBVT_ENCRYPTED) && *(PWORD)(pBlob + 1) != dbcwWork.value.cpbVal))
{
// bin it
NeedBytes(3);
int nameLen = 1 + settingNameLen;
int valLen = 1 + GetSettingValueLength(pBlob);
DWORD ofsSettingToCut = ofsBlobPtr - nameLen;
MoveAlong(valLen);
NeedBytes(1);
while (pBlob[0]) {
MoveAlong(pBlob[0] + 1);
NeedBytes(3);
MoveAlong(1 + GetSettingValueLength(pBlob));
NeedBytes(1);
}
DBMoveChunk(ofsSettingToCut, ofsSettingToCut + nameLen + valLen, ofsBlobPtr + 1 - ofsSettingToCut);
ofsBlobPtr -= nameLen + valLen;
pBlob = (PBYTE)DBRead(ofsBlobPtr, &bytesRemaining);
}
else {
// replace existing setting at pBlob
MoveAlong(1); // skip data type
switch (dbcwWork.value.type) {
case DBVT_BYTE: DBWrite(ofsBlobPtr, &dbcwWork.value.bVal, 1); break;
case DBVT_WORD: DBWrite(ofsBlobPtr, &dbcwWork.value.wVal, 2); break;
case DBVT_DWORD: DBWrite(ofsBlobPtr, &dbcwWork.value.dVal, 4); break;
case DBVT_BLOB:
DBWrite(ofsBlobPtr + 2, dbcwWork.value.pbVal, dbcwWork.value.cpbVal);
break;
case DBVT_ENCRYPTED:
DBWrite(ofsBlobPtr + 2, dbcwWork.value.pbVal, dbcwWork.value.cpbVal);
break;
case DBVT_UTF8:
case DBVT_ASCIIZ:
DBWrite(ofsBlobPtr + 2, dbcwWork.value.pszVal, dbcwWork.value.cchVal);
break;
}
// quit
DBFlush(1);
lck.unlock();
// notify
NotifyEventHooks(hSettingChangeEvent, contactID, (LPARAM)&dbcwNotif);
return 0;
}
}
}
// cannot do a simple replace, add setting to end of list
// pBlob already points to end of list
// see if it fits
switch (dbcwWork.value.type) {
case DBVT_ASCIIZ: case DBVT_UTF8:
bytesRequired = dbcwWork.value.cchVal + 2;
break;
case DBVT_BLOB: case DBVT_ENCRYPTED:
bytesRequired = dbcwWork.value.cpbVal + 2;
break;
default:
bytesRequired = dbcwWork.value.type;
}
bytesRequired += 2 + settingNameLen;
bytesRequired += ofsBlobPtr + 1 - (ofsSettingsGroup + offsetof(DBContactSettings, blob));
if ((DWORD)bytesRequired > dbcs.cbBlob) {
// doesn't fit: move entire group
DBContactSettings *dbcsPrev;
DWORD ofsDbcsPrev, ofsNew;
InvalidateSettingsGroupOfsCacheEntry(ofsSettingsGroup);
bytesRequired += (DB_SETTINGS_RESIZE_GRANULARITY - (bytesRequired % DB_SETTINGS_RESIZE_GRANULARITY)) % DB_SETTINGS_RESIZE_GRANULARITY;
// find previous group to change its offset
ofsDbcsPrev = dbc.ofsFirstSettings;
if (ofsDbcsPrev == ofsSettingsGroup) ofsDbcsPrev = 0;
else {
dbcsPrev = (DBContactSettings*)DBRead(ofsDbcsPrev, NULL);
while (dbcsPrev->ofsNext != ofsSettingsGroup) {
if (dbcsPrev->ofsNext == 0) DatabaseCorruption(NULL);
ofsDbcsPrev = dbcsPrev->ofsNext;
dbcsPrev = (DBContactSettings*)DBRead(ofsDbcsPrev, NULL);
}
}
// create the new one
ofsNew = ReallocSpace(ofsSettingsGroup, dbcs.cbBlob + offsetof(DBContactSettings, blob), bytesRequired + offsetof(DBContactSettings, blob));
dbcs.cbBlob = bytesRequired;
DBWrite(ofsNew, &dbcs, offsetof(DBContactSettings, blob));
if (ofsDbcsPrev == 0) {
dbc.ofsFirstSettings = ofsNew;
DBWrite(ofsContact, &dbc, sizeof(DBContact));
}
else {
dbcsPrev = (DBContactSettings*)DBRead(ofsDbcsPrev, NULL);
dbcsPrev->ofsNext = ofsNew;
DBWrite(ofsDbcsPrev, dbcsPrev, offsetof(DBContactSettings, blob));
}
ofsBlobPtr += ofsNew - ofsSettingsGroup;
ofsSettingsGroup = ofsNew;
pBlob = (PBYTE)DBRead(ofsBlobPtr, &bytesRemaining);
}
// we now have a place to put it and enough space: make it
DBWrite(ofsBlobPtr, &settingNameLen, 1);
DBWrite(ofsBlobPtr + 1, (PVOID)dbcwWork.szSetting, settingNameLen);
MoveAlong(1 + settingNameLen);
DBWrite(ofsBlobPtr, &dbcwWork.value.type, 1);
MoveAlong(1);
switch (dbcwWork.value.type) {
case DBVT_BYTE: DBWrite(ofsBlobPtr, &dbcwWork.value.bVal, 1); MoveAlong(1); break;
case DBVT_WORD: DBWrite(ofsBlobPtr, &dbcwWork.value.wVal, 2); MoveAlong(2); break;
case DBVT_DWORD: DBWrite(ofsBlobPtr, &dbcwWork.value.dVal, 4); MoveAlong(4); break;
case DBVT_BLOB:
DBWrite(ofsBlobPtr, &dbcwWork.value.cpbVal, 2);
DBWrite(ofsBlobPtr + 2, dbcwWork.value.pbVal, dbcwWork.value.cpbVal);
MoveAlong(2 + dbcwWork.value.cpbVal);
break;
case DBVT_ENCRYPTED:
DBWrite(ofsBlobPtr, &dbcwWork.value.cpbVal, 2);
DBWrite(ofsBlobPtr + 2, dbcwWork.value.pbVal, dbcwWork.value.cpbVal);
MoveAlong(2 + dbcwWork.value.cpbVal);
break;
case DBVT_UTF8: case DBVT_ASCIIZ:
DBWrite(ofsBlobPtr, &dbcwWork.value.cchVal, 2);
DBWrite(ofsBlobPtr + 2, dbcwWork.value.pszVal, dbcwWork.value.cchVal);
MoveAlong(2 + dbcwWork.value.cchVal);
break;
}
BYTE zero = 0;
DBWrite(ofsBlobPtr, &zero, 1);
// quit
DBFlush(1);
lck.unlock();
// notify
NotifyEventHooks(hSettingChangeEvent, contactID, (LPARAM)&dbcwNotif);
return 0;
}
STDMETHODIMP_(HANDLE) CDb3Mmap::AddEvent(MCONTACT contactID, DBEVENTINFO *dbei)
{
if (dbei == NULL || dbei->cbSize != sizeof(DBEVENTINFO)) return 0;
if (dbei->timestamp == 0) return 0;
DBEvent dbe;
dbe.signature = DBEVENT_SIGNATURE;
dbe.contactID = contactID; // store native or subcontact's id
dbe.timestamp = dbei->timestamp;
dbe.flags = dbei->flags;
dbe.wEventType = dbei->eventType;
dbe.cbBlob = dbei->cbBlob;
BYTE *pBlob = dbei->pBlob;
MCONTACT contactNotifyID = contactID;
DBCachedContact *ccSub = NULL;
if (contactID != 0) {
DBCachedContact *cc = m_cache->GetCachedContact(contactID);
if (cc == NULL)
return NULL;
if (cc->IsSub()) {
ccSub = cc;
// set default sub to the event's source
db_mc_setDefault(cc->parentID, contactID, false);
contactID = cc->parentID; // and add an event to a metahistory
if (db_mc_isEnabled())
contactNotifyID = contactID;
}
}
if (NotifyEventHooks(hEventFilterAddedEvent, contactNotifyID, (LPARAM)dbei))
return NULL;
mir_ptr<BYTE> pCryptBlob;
if (m_bEncrypted) {
size_t len;
BYTE *pResult = m_crypto->encodeBuffer(pBlob, dbe.cbBlob, &len);
if (pResult != NULL) {
pCryptBlob = pBlob = pResult;
dbe.cbBlob = (DWORD)len;
dbe.flags |= DBEF_ENCRYPTED;
}
}
bool neednotify;
mir_cslockfull lck(m_csDbAccess);
DWORD ofsContact = GetContactOffset(contactID);
DBContact dbc = *(DBContact*)DBRead(ofsContact, sizeof(DBContact), NULL);
if (dbc.signature != DBCONTACT_SIGNATURE)
return NULL;
DWORD ofsNew = CreateNewSpace(offsetof(DBEvent, blob) + dbe.cbBlob);
dbe.ofsModuleName = GetModuleNameOfs(dbei->szModule);
// find where to put it - sort by timestamp
if (dbc.eventCount == 0) {
dbe.ofsPrev = dbe.ofsNext = 0;
dbc.ofsFirstEvent = dbc.ofsLastEvent = ofsNew;
}
else {
DBEvent *dbeTest = (DBEvent*)DBRead(dbc.ofsFirstEvent, sizeof(DBEvent), NULL);
// Should new event be placed before first event in chain?
if (dbe.timestamp < dbeTest->timestamp) {
dbe.ofsPrev = 0;
dbe.ofsNext = dbc.ofsFirstEvent;
dbc.ofsFirstEvent = ofsNew;
dbeTest = (DBEvent*)DBRead(dbe.ofsNext, sizeof(DBEvent), NULL);
dbeTest->ofsPrev = ofsNew;
DBWrite(dbe.ofsNext, dbeTest, sizeof(DBEvent));
}
else {
// Loop through the chain, starting at the end
DWORD ofsThis = dbc.ofsLastEvent;
dbeTest = (DBEvent*)DBRead(ofsThis, sizeof(DBEvent), NULL);
for (;;) {
// If the new event's timesstamp is equal to or greater than the
// current dbevent, it will be inserted after. If not, continue
// with the previous dbevent in chain.
if (dbe.timestamp >= dbeTest->timestamp) {
dbe.ofsPrev = ofsThis;
dbe.ofsNext = dbeTest->ofsNext;
dbeTest->ofsNext = ofsNew;
DBWrite(ofsThis, dbeTest, sizeof(DBEvent));
if (dbe.ofsNext == 0)
dbc.ofsLastEvent = ofsNew;
else {
dbeTest = (DBEvent*)DBRead(dbe.ofsNext, sizeof(DBEvent), NULL);
dbeTest->ofsPrev = ofsNew;
DBWrite(dbe.ofsNext, dbeTest, sizeof(DBEvent));
}
break;
}
ofsThis = dbeTest->ofsPrev;
dbeTest = (DBEvent*)DBRead(ofsThis, sizeof(DBEvent), NULL);
}
}
}
dbc.eventCount++;
if (!(dbe.flags & (DBEF_READ | DBEF_SENT))) {
if (dbe.timestamp < dbc.tsFirstUnread || dbc.tsFirstUnread == 0) {
dbc.tsFirstUnread = dbe.timestamp;
dbc.ofsFirstUnread = ofsNew;
}
neednotify = true;
}
else neednotify = m_safetyMode;
if (ccSub != NULL) {
DBContact *pSub = (DBContact*)DBRead(ccSub->dwDriverData, sizeof(DBContact), NULL);
pSub->eventCount++;
}
DBWrite(ofsContact, &dbc, sizeof(DBContact));
DBWrite(ofsNew, &dbe, offsetof(DBEvent, blob));
DBWrite(ofsNew + offsetof(DBEvent, blob), pBlob, dbe.cbBlob);
DBFlush(0);
lck.unlock();
log1("add event @ %08x", ofsNew);
// Notify only in safe mode or on really new events
if (neednotify)
NotifyEventHooks(hEventAddedEvent, contactNotifyID, (LPARAM)ofsNew);
return (HANDLE)ofsNew;
}
STDMETHODIMP_(LONG) CDb3Mmap::GetEventCount(MCONTACT contactID)
{
mir_cslock lck(m_csDbAccess);
DBContact *dbc = (DBContact*)DBRead(GetContactOffset(contactID), sizeof(DBContact), NULL);
return (dbc->signature != DBCONTACT_SIGNATURE) ? -1 : dbc->eventCount;
}
STDMETHODIMP_(BOOL) CDb3Mmap::DeleteEvent(MCONTACT contactID, HANDLE hDbEvent)
{
DBCachedContact *cc;
if (contactID) {
if ((cc = m_cache->GetCachedContact(contactID)) == NULL)
return 2;
if (cc->IsSub())
if ((cc = m_cache->GetCachedContact(cc->parentID)) == NULL)
return 3;
}
else cc = NULL;
mir_cslockfull lck(m_csDbAccess);
DWORD ofsContact = (cc) ? cc->dwDriverData : m_dbHeader.ofsUser;
DBContact dbc = *(DBContact*)DBRead(ofsContact, sizeof(DBContact), NULL);
DBEvent dbe = *(DBEvent*)DBRead((DWORD)hDbEvent, sizeof(DBEvent), NULL);
if (dbc.signature != DBCONTACT_SIGNATURE || dbe.signature != DBEVENT_SIGNATURE)
return 1;
lck.unlock();
log1("delete event @ %08x", hContact);
// call notifier while outside mutex
NotifyEventHooks(hEventDeletedEvent, contactID, (LPARAM)hDbEvent);
// get back in
lck.lock();
dbc = *(DBContact*)DBRead(ofsContact, sizeof(DBContact), NULL);
dbe = *(DBEvent*)DBRead((DWORD)hDbEvent, sizeof(DBEvent), NULL);
// check if this was the first unread, if so, recalc the first unread
if (dbc.ofsFirstUnread == (DWORD)hDbEvent) {
for (DBEvent *dbeNext = &dbe;;) {
if (dbeNext->ofsNext == 0) {
dbc.ofsFirstUnread = 0;
dbc.tsFirstUnread = 0;
break;
}
DWORD ofsThis = dbeNext->ofsNext;
dbeNext = (DBEvent*)DBRead(ofsThis, sizeof(DBEvent), NULL);
if (!dbeNext->markedRead()) {
dbc.ofsFirstUnread = ofsThis;
dbc.tsFirstUnread = dbeNext->timestamp;
break;
}
}
}
// get previous and next events in chain and change offsets
if (dbe.ofsPrev == 0) {
if (dbe.ofsNext == 0)
dbc.ofsFirstEvent = dbc.ofsLastEvent = 0;
else {
DBEvent *dbeNext = (DBEvent*)DBRead(dbe.ofsNext, sizeof(DBEvent), NULL);
dbeNext->ofsPrev = 0;
DBWrite(dbe.ofsNext, dbeNext, sizeof(DBEvent));
dbc.ofsFirstEvent = dbe.ofsNext;
}
}
else {
if (dbe.ofsNext == 0) {
DBEvent *dbePrev = (DBEvent*)DBRead(dbe.ofsPrev, sizeof(DBEvent), NULL);
dbePrev->ofsNext = 0;
DBWrite(dbe.ofsPrev, dbePrev, sizeof(DBEvent));
dbc.ofsLastEvent = dbe.ofsPrev;
}
else {
DBEvent *dbePrev = (DBEvent*)DBRead(dbe.ofsPrev, sizeof(DBEvent), NULL);
dbePrev->ofsNext = dbe.ofsNext;
DBWrite(dbe.ofsPrev, dbePrev, sizeof(DBEvent));
DBEvent *dbeNext = (DBEvent*)DBRead(dbe.ofsNext, sizeof(DBEvent), NULL);
dbeNext->ofsPrev = dbe.ofsPrev;
DBWrite(dbe.ofsNext, dbeNext, sizeof(DBEvent));
}
}
// decrement event count
dbc.eventCount--;
DBWrite(ofsContact, &dbc, sizeof(DBContact));
// delete event
DeleteSpace((DWORD)hDbEvent, offsetof(DBEvent, blob) + dbe.cbBlob);
// also update a sub
if (cc && dbe.contactID != cc->contactID) {
DBContact *pSub = (DBContact*)DBRead(GetContactOffset(dbe.contactID), sizeof(DBContact), NULL);
if (pSub->eventCount > 0)
pSub->eventCount--;
}
DBFlush(0);
return 0;
}
STDMETHODIMP_(LONG) CDb3Mmap::DeleteContact(MCONTACT contactID)
{
if (contactID == 0) // global contact cannot be removed
return 1;
mir_cslockfull lck(m_csDbAccess);
DWORD ofsContact = GetContactOffset(contactID);
DBContact *dbc = (DBContact*)DBRead(ofsContact, NULL);
if (dbc->signature != DBCONTACT_SIGNATURE)
return 1;
if (ofsContact == m_dbHeader.ofsUser) {
log0("FATAL: del of user chain attempted.");
return 1;
}
lck.unlock();
log0("del contact");
// call notifier while outside mutex
NotifyEventHooks(hContactDeletedEvent, contactID, 0);
// get back in
lck.lock();
// delete settings chain
DWORD ofsThis = dbc->ofsFirstSettings;
DWORD ofsFirstEvent = dbc->ofsFirstEvent;
while (ofsThis) {
DBContactSettings *dbcs = (DBContactSettings*)DBRead(ofsThis, NULL);
DWORD ofsNext = dbcs->ofsNext;
DeleteSpace(ofsThis, offsetof(DBContactSettings, blob) + dbcs->cbBlob);
ofsThis = ofsNext;
}
// delete event chain
ofsThis = ofsFirstEvent;
while (ofsThis) {
DBEvent *dbe = (DBEvent*)DBRead(ofsThis, NULL);
DWORD ofsNext = dbe->ofsNext;
DeleteSpace(ofsThis, offsetof(DBEvent, blob) + dbe->cbBlob);
ofsThis = ofsNext;
}
// find previous contact in chain and change ofsNext
if (m_dbHeader.ofsFirstContact == ofsContact) {
m_dbHeader.ofsFirstContact = dbc->ofsNext;
DBWrite(0, &m_dbHeader, sizeof(m_dbHeader));
}
else {
DWORD ofsNext = dbc->ofsNext;
ofsThis = m_dbHeader.ofsFirstContact;
DBContact *dbcPrev = (DBContact*)DBRead(ofsThis, NULL);
while (dbcPrev->ofsNext != ofsContact) {
if (dbcPrev->ofsNext == 0) DatabaseCorruption(NULL);
ofsThis = dbcPrev->ofsNext;
dbcPrev = (DBContact*)DBRead(ofsThis, NULL);
}
dbcPrev->ofsNext = ofsNext;
DBWrite(ofsThis, dbcPrev, sizeof(DBContact));
}
// delete contact
DeleteSpace(ofsContact, sizeof(DBContact));
// decrement contact count
m_dbHeader.contactCount--;
DBWrite(0, &m_dbHeader, sizeof(m_dbHeader));
DBFlush(0);
// free cache item
m_cache->FreeCachedContact(contactID);
if (contactID == m_hLastCachedContact)
m_hLastCachedContact = NULL;
return 0;
}
void CDb3Mmap::ToggleEventsEncryption(MCONTACT contactID)
{
DWORD ofsContact = GetContactOffset(contactID);
if (ofsContact == 0)
return;
DBContact contact = *(DBContact*)DBRead(ofsContact, NULL);
if (contact.ofsFirstEvent == 0 || contact.signature != DBCONTACT_SIGNATURE)
return;
// fast cycle through all events
for (DWORD offset = contact.ofsFirstEvent; offset != 0;) {
DBEvent evt = *(DBEvent*)DBRead(offset, NULL);
if (evt.signature != DBEVENT_SIGNATURE)
return;
size_t len;
DWORD ofsDest;
mir_ptr<BYTE> pBlob;
BYTE *pSource = DBRead(offset + offsetof(DBEvent, blob), 0);
if (!m_bEncrypted) { // we need more space
if ((pBlob = m_crypto->encodeBuffer(pSource, evt.cbBlob, &len)) == NULL)
return;
ofsDest = ReallocSpace(offset, offsetof(DBEvent, blob) + evt.cbBlob, offsetof(DBEvent, blob) + (DWORD)len);
if (evt.ofsNext) {
DBEvent *e = (DBEvent*)DBRead(evt.ofsNext, NULL);
e->ofsPrev = ofsDest;
DBWrite(evt.ofsNext, e, sizeof(DBEvent));
}
if (evt.ofsPrev) {
DBEvent *e = (DBEvent*)DBRead(evt.ofsPrev, NULL);
e->ofsNext = ofsDest;
DBWrite(evt.ofsPrev, e, sizeof(DBEvent));
}
if (contact.ofsFirstEvent == offset)
contact.ofsFirstEvent = ofsDest;
if (contact.ofsLastEvent == offset)
contact.ofsLastEvent = ofsDest;
if (contact.ofsFirstUnread == offset)
contact.ofsFirstUnread = ofsDest;
evt.flags |= DBEF_ENCRYPTED;
}
else {
if ((pBlob = (BYTE*)m_crypto->decodeBuffer(pSource, evt.cbBlob, &len)) == NULL)
return;
ofsDest = offset; // reuse the old space
evt.flags &= ~DBEF_ENCRYPTED;
if (len < evt.cbBlob)
DBFill(ofsDest + offsetof(DBEvent, blob) + (DWORD)len, evt.cbBlob - (DWORD)len);
}
evt.cbBlob = (DWORD)len;
DBWrite(ofsDest, &evt, offsetof(DBEvent, blob));
DBWrite(ofsDest + offsetof(DBEvent, blob), pBlob, (DWORD)len);
offset = evt.ofsNext;
}
DBWrite(ofsContact, &contact, sizeof(DBContact));
}
void CDb3Mmap::ToggleSettingsEncryption(MCONTACT contactID)
{
DWORD ofsContact = GetContactOffset(contactID);
if (ofsContact == 0)
return;
DBContact *contact = (DBContact*)DBRead(ofsContact, NULL);
if (contact->ofsFirstSettings == 0)
return;
// fast cycle through all settings
DBContactSettings *setting = (DBContactSettings*)DBRead(contact->ofsFirstSettings, NULL);
DWORD offset = contact->ofsFirstSettings;
char *szModule = GetModuleNameByOfs(setting->ofsModuleName);
if (szModule == NULL)
return;
while (true) {
OBJLIST<VarDescr> arSettings(10);
char szSetting[256];
int bytesRemaining, len;
DWORD ofsBlobPtr = offset + offsetof(DBContactSettings, blob), ofsNext = setting->ofsNext;
PBYTE pBlob = (PBYTE)DBRead(ofsBlobPtr, &bytesRemaining);
while (pBlob[0]) {
NeedBytes(1);
len = pBlob[0];
memcpy(szSetting, pBlob + 1, len); szSetting[len] = 0;
NeedBytes(1 + pBlob[0]);
MoveAlong(1 + pBlob[0]);
NeedBytes(5);
switch (pBlob[0]) {
case DBVT_ASCIIZ:
len = *(PWORD)(pBlob + 1);
// we need to convert a string into utf8 and encrypt it
if (!m_bEncrypted) {
BYTE bSave = pBlob[len + 3]; pBlob[len + 3] = 0;
arSettings.insert(new VarDescr(szSetting, mir_utf8encode((LPCSTR)pBlob + 3)));
pBlob[len + 3] = bSave;
}
NeedBytes(3 + len);
break;
case DBVT_UTF8:
len = *(PWORD)(pBlob + 1);
// we need to encrypt these strings
if (!m_bEncrypted) {
BYTE bSave = pBlob[len + 3]; pBlob[len + 3] = 0;
arSettings.insert(new VarDescr(szSetting, (LPCSTR)pBlob + 3));
pBlob[len + 3] = bSave;
}
NeedBytes(3 + len);
break;
case DBVT_ENCRYPTED:
len = *(PWORD)(pBlob + 1);
// we need to decrypt these strings
if (m_bEncrypted && !IsSettingEncrypted(szModule, szSetting))
arSettings.insert(new VarDescr(szSetting, pBlob + 3, len));
NeedBytes(3 + len);
break;
case DBVT_BLOB:
NeedBytes(3 + *(PWORD)(pBlob + 1));
break;
}
NeedBytes(3);
MoveAlong(1 + GetSettingValueLength(pBlob));
NeedBytes(1);
}
for (int i = 0; i < arSettings.getCount(); i++) {
VarDescr &p = arSettings[i];
if (!m_bEncrypted) {
size_t encodedLen;
BYTE *pResult = m_crypto->encodeString(p.szValue, &encodedLen);
if (pResult != NULL) {
DBCONTACTWRITESETTING dbcws = { szModule, p.szVar };
dbcws.value.type = DBVT_ENCRYPTED;
dbcws.value.pbVal = pResult;
dbcws.value.cpbVal = (WORD)encodedLen;
WriteContactSetting(contactID, &dbcws);
mir_free(pResult);
}
}
else {
size_t realLen;
ptrA decoded(m_crypto->decodeString((PBYTE)(char*)p.szValue, p.iLen, &realLen));
if (decoded != NULL) {
DBCONTACTWRITESETTING dbcws = { szModule, p.szVar };
dbcws.value.type = DBVT_UNENCRYPTED;
dbcws.value.pszVal = decoded;
dbcws.value.cchVal = (WORD)realLen;
WriteContactSetting(contactID, &dbcws);
}
}
}
if (!ofsNext)
break;
setting = (DBContactSettings*)DBRead(offset = ofsNext, NULL);
if ((szModule = GetModuleNameByOfs(setting->ofsModuleName)) == NULL)
break;
}
}
