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/*
Miranda NG: the free IM client for Microsoft* Windows*
Copyright (ñ) 2012-16 Miranda NG project (http://miranda-ng.org)
all portions of this codebase are copyrighted to the people
listed in contributors.txt.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "stdafx.h"
CDbxMdb::CDbxMdb(const TCHAR *tszFileName, int iMode) :
m_safetyMode(true),
m_bReadOnly((iMode & DBMODE_READONLY) != 0),
m_bShared((iMode & DBMODE_SHARED) != 0),
m_lResidentSettings(50, strcmp),
m_maxContactId(1)
{
m_tszProfileName = mir_tstrdup(tszFileName);
InitDbInstance(this);
mdb_env_create(&m_pMdbEnv);
mdb_env_set_maxdbs(m_pMdbEnv, 10);
mdb_env_set_userctx(m_pMdbEnv, this);
// mdb_env_set_assert(m_pMdbEnv, LMDB_FailAssert);
m_codePage = Langpack_GetDefaultCodePage();
}
CDbxMdb::~CDbxMdb()
{
mdb_env_close(m_pMdbEnv);
DestroyServiceFunction(hService);
UnhookEvent(hHook);
if (m_crypto)
m_crypto->destroy();
DestroyHookableEvent(hContactDeletedEvent);
DestroyHookableEvent(hContactAddedEvent);
DestroyHookableEvent(hSettingChangeEvent);
DestroyHookableEvent(hEventMarkedRead);
DestroyHookableEvent(hEventAddedEvent);
DestroyHookableEvent(hEventDeletedEvent);
DestroyHookableEvent(hEventFilterAddedEvent);
DestroyDbInstance(this);
mir_free(m_tszProfileName);
}
int CDbxMdb::Load(bool bSkipInit)
{
if (Map() != MDB_SUCCESS)
return EGROKPRF_CANTREAD;
if (!bSkipInit) {
txn_ptr trnlck(m_pMdbEnv);
unsigned int defFlags = MDB_CREATE;
mdb_dbi_open(trnlck, "global", defFlags | MDB_INTEGERKEY, &m_dbGlobal);
mdb_dbi_open(trnlck, "crypto", defFlags, &m_dbCrypto);
mdb_dbi_open(trnlck, "contacts", defFlags | MDB_INTEGERKEY, &m_dbContacts);
mdb_dbi_open(trnlck, "modules", defFlags | MDB_INTEGERKEY, &m_dbModules);
mdb_dbi_open(trnlck, "events", defFlags | MDB_INTEGERKEY, &m_dbEvents);
mdb_dbi_open(trnlck, "eventsrt", defFlags, &m_dbEventsSort);
mdb_set_compare(trnlck, m_dbEventsSort, DBEventSortingKey::Compare);
mdb_dbi_open(trnlck, "settings", defFlags, &m_dbSettings);
mdb_set_compare(trnlck, m_dbSettings, DBSettingKey::Compare);
uint32_t keyVal = 1;
MDB_val key = { sizeof(keyVal), &keyVal }, data;
if (mdb_get(trnlck, m_dbGlobal, &key, &data) == MDB_SUCCESS)
{
const DBHeader *hdr = (const DBHeader*)data.mv_data;
if (hdr->dwSignature != DBHEADER_SIGNATURE)
return EGROKPRF_DAMAGED;
if (hdr->dwVersion != DBHEADER_VERSION)
return EGROKPRF_OBSOLETE;
m_header = *hdr;
}
else
{
m_header.dwSignature = DBHEADER_SIGNATURE;
m_header.dwVersion = DBHEADER_VERSION;
data.mv_data = &m_header; data.mv_size = sizeof(m_header);
mdb_put(trnlck, m_dbGlobal, &key, &data, 0);
keyVal = 0;
DBContact dbc = { 0, 0, 0 };
data.mv_data = &dbc; data.mv_size = sizeof(dbc);
mdb_put(trnlck, m_dbContacts, &key, &data, 0);
}
trnlck.commit();
{
MDB_val key, val;
mdb_txn_begin(m_pMdbEnv, nullptr, MDB_RDONLY, &m_txn);
mdb_cursor_open(m_txn, m_dbEvents, &m_curEvents);
if (mdb_cursor_get(m_curEvents, &key, &val, MDB_LAST) == MDB_SUCCESS)
m_dwMaxEventId = *(MEVENT*)key.mv_data;
mdb_cursor_open(m_txn, m_dbEventsSort, &m_curEventsSort);
mdb_cursor_open(m_txn, m_dbSettings, &m_curSettings);
mdb_cursor_open(m_txn, m_dbModules, &m_curModules);
mdb_cursor_open(m_txn, m_dbContacts, &m_curContacts);
if (mdb_cursor_get(m_curContacts, &key, &val, MDB_LAST) == MDB_SUCCESS)
m_maxContactId = *(MCONTACT*)key.mv_data;
MDB_stat st;
mdb_stat(m_txn, m_dbContacts, &st);
m_contactCount = st.ms_entries;
mdb_txn_reset(m_txn);
}
if (InitModules()) return EGROKPRF_DAMAGED;
if (InitCrypt()) return EGROKPRF_DAMAGED;
// everything is ok, go on
if (!m_bReadOnly) {
// we don't need events in the service mode
if (ServiceExists(MS_DB_SETSAFETYMODE)) {
hContactDeletedEvent = CreateHookableEvent(ME_DB_CONTACT_DELETED);
hContactAddedEvent = CreateHookableEvent(ME_DB_CONTACT_ADDED);
hSettingChangeEvent = CreateHookableEvent(ME_DB_CONTACT_SETTINGCHANGED);
hEventMarkedRead = CreateHookableEvent(ME_DB_EVENT_MARKED_READ);
hEventAddedEvent = CreateHookableEvent(ME_DB_EVENT_ADDED);
hEventDeletedEvent = CreateHookableEvent(ME_DB_EVENT_DELETED);
hEventFilterAddedEvent = CreateHookableEvent(ME_DB_EVENT_FILTER_ADD);
}
}
FillContacts();
}
return EGROKPRF_NOERROR;
}
int CDbxMdb::Create(void)
{
return (Map() == MDB_SUCCESS) ? 0 : EGROKPRF_CANTREAD;
}
size_t iDefHeaderOffset = 16;
BYTE bDefHeader[] = { 0xDE, 0xC0, 0xEF, 0xBE };
int CDbxMdb::Check(void)
{
FILE *pFile = _tfopen(m_tszProfileName, L"rb");
if (pFile == nullptr)
return EGROKPRF_CANTREAD;
fseek(pFile, iDefHeaderOffset, SEEK_SET);
BYTE buf[_countof(bDefHeader)];
if (fread(buf, 1, _countof(buf), pFile) != _countof(buf))
return EGROKPRF_DAMAGED;
fclose(pFile);
return (memcmp(buf, bDefHeader, _countof(bDefHeader))) ? EGROKPRF_UNKHEADER : 0;
}
int CDbxMdb::PrepareCheck(int*)
{
InitModules();
return InitCrypt();
}
STDMETHODIMP_(void) CDbxMdb::SetCacheSafetyMode(BOOL bIsSet)
{
m_safetyMode = bIsSet != 0;
}
int CDbxMdb::Map()
{
unsigned int mode = MDB_NOSYNC | MDB_NOSUBDIR | /*MDB_NOLOCK |*/ MDB_NOTLS | MDB_WRITEMAP;
if (m_bReadOnly)
mode |= MDB_RDONLY;
return mdb_env_open(m_pMdbEnv, _T2A(m_tszProfileName), mode, 0664);
}
bool CDbxMdb::Remap()
{
MDB_envinfo ei;
mdb_env_info(m_pMdbEnv, &ei);
return mdb_env_set_mapsize(m_pMdbEnv, ei.me_mapsize + 0x100000) == MDB_SUCCESS;
}
/////////////////////////////////////////////////////////////////////////////////////////
static DWORD DatabaseCorrupted = 0;
static const TCHAR *msg = NULL;
static DWORD dwErr = 0;
static TCHAR tszPanic[] = LPGENT("Miranda has detected corruption in your database. This corruption may be fixed by DbChecker plugin. Please download it from http://miranda-ng.org/p/DbChecker/. Miranda will now shut down.");
EXTERN_C void __cdecl dbpanic(void *)
{
if (msg) {
if (dwErr == ERROR_DISK_FULL)
msg = TranslateT("Disk is full. Miranda will now shut down.");
TCHAR err[256];
mir_sntprintf(err, _countof(err), msg, TranslateT("Database failure. Miranda will now shut down."), dwErr);
MessageBox(0, err, TranslateT("Database Error"), MB_SETFOREGROUND | MB_TOPMOST | MB_APPLMODAL | MB_ICONWARNING | MB_OK);
}
else MessageBox(0, TranslateTS(tszPanic), TranslateT("Database Panic"), MB_SETFOREGROUND | MB_TOPMOST | MB_APPLMODAL | MB_ICONWARNING | MB_OK);
TerminateProcess(GetCurrentProcess(), 255);
}
EXTERN_C void LMDB_FailAssert(MDB_env *env, const char *text)
{
((CDbxMdb*)mdb_env_get_userctx(env))->DatabaseCorruption(_A2T(text));
}
EXTERN_C void LMDB_Log(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
CallService(MS_NETLIB_LOG, 0, (LPARAM)(CMStringA().FormatV(fmt, args)));
va_end(args);
}
void CDbxMdb::DatabaseCorruption(const TCHAR *text)
{
int kill = 0;
if (DatabaseCorrupted == 0) {
DatabaseCorrupted++;
kill++;
msg = text;
dwErr = GetLastError();
}
else {
/* db is already corrupted, someone else is dealing with it, wait here
so that we don't do any more damage */
Sleep(INFINITE);
return;
}
if (kill) {
_beginthread(dbpanic, 0, NULL);
Sleep(INFINITE);
}
}
///////////////////////////////////////////////////////////////////////////////
// MIDatabaseChecker
typedef int (CDbxMdb::*CheckWorker)(int);
int CDbxMdb::Start(DBCHeckCallback *callback)
{
cb = callback;
return ERROR_SUCCESS;
}
int CDbxMdb::CheckDb(int, int)
{
return ERROR_OUT_OF_PAPER;
}
void CDbxMdb::Destroy()
{
delete this;
}
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