The WoW Launcher’s ‘setRealmlist’
The other day, I had someone who was working on their own launcher ask me about the algorithm I use in order to change the realmlist in the launcher.
First, you need to keep in mind that blizzard has moved it around a bit.
- 1.x – 2.x, it was located in the same folder as Wow.exe
- 3.x – 5.0.4, it was moved into your locales Data folder
- 5.0.4 made the realmlist file obsolete, and the values are now stored in Config.wtf
With that in mind, the very first thing I do is get the version info for Wow.exe
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bool SetRealmlist(const TCHAR *realmlist, bool force) { TCHAR FileName[MAX_PATH]; _tcscpy(FileName, (*sActive).Install.c_str()); _tcscat(FileName, _T("\\Wow.exe")); DWORD dwDummy, dwLen = GetFileVersionInfoSize(FileName, &dwDummy); if( dwLen ) { BYTE *versionInfo = new BYTE[dwLen]; if( versionInfo ) { if( GetFileVersionInfo(FileName, NULL, dwLen, versionInfo) ) { UINT uLen; VS_FIXEDFILEINFO *ffi; if( VerQueryValue(versionInfo, _T("\\"), (LPVOID *)&ffi, &uLen) != 0 ) { /* Do stuff */ } } delete [] versionInfo; } } return true; } |
Once we have the version, we do a simple check to see if the major version is above 3.
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if( HIWORD(ffi->dwFileVersionMS) >= 3 ) |
If it isn’t, we can just read the realmlist.wtf from the same directory that Wow.exe is in. If it is however, then we’re going to be reading the realmlist.wtf file from /Data/RegionCode/realmlist.wtf.
To do so, we need to figure out the users RegionCode. The simplest way to do this is to read their Config.wtf and read their “Set locale” line if it exists. As a fallback, we loop through all folders inside of Data.
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if( HIWORD(ffi->dwFileVersionMS) >= 3 ) { // Realmlist is in \Data\RegionCode\ (eg: \Data\enUS) _tcscpy(DirPath, (*sActive).Install.c_str()); _tcscat(DirPath, _T("\\Data\\*")); _tcscpy(FileName, (*sActive).Install.c_str()); _tcscat(FileName, _T("\\Data\\")); // find the first file hFind = FindFirstFile(DirPath, &FindFileData); if( hFind == INVALID_HANDLE_VALUE) return false; _tcscpy(DirPath, FileName); while( bSearch ) { if( FindNextFile(hFind, &FindFileData) ) { if( !_tcscmp(FindFileData.cFileName, _T(".")) || !_tcscmp(FindFileData.cFileName, _T("..")) ) continue; _tcscat(FileName, FindFileData.cFileName); if( FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ) { TCHAR *ConfigLocale = GetConfigLocale(const_cast<TCHAR *>((*sActive).Install.c_str())); // Read locale from config to match if( (ConfigLocale != NULL && !_tcscmp(ConfigLocale, _T("")) && _tcscmp(FindFileData.cFileName, ConfigLocale)) || _tcslen(FindFileData.cFileName) == 4 ) // if they don't match, just make sure it's a RegionCode like enUS enGB frFR deDE etc { _tcscat(FileName, _T("\\realmlist.wtf")); if( force ) { hRealmlist = _tfopen(FileName, _T("wb")); bSearch = false; } else { SECURITY_ATTRIBUTES sa; ZeroMemory(&sa, sizeof(sa)); HANDLE hFile = CreateFile(FileName, GENERIC_READ, FILE_SHARE_READ, &sa, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); if( hFile != INVALID_HANDLE_VALUE ) { CloseHandle(hFile); hRealmlist = _tfopen(FileName, _T("wb")); bSearch = false; } } } if( ConfigLocale != NULL ) delete[] ConfigLocale; } _tcscpy(FileName, DirPath); } else { if( GetLastError() == ERROR_NO_MORE_FILES ) bSearch = false; } } FindClose(hFind); } else { // Realmlist is in root _tcscpy(FileName, (*sActive).Install.c_str()); _tcscat(FileName, _T("\\realmlist.wtf")); if( force ) hRealmlist = _tfopen(FileName, _T("wb")); else { SECURITY_ATTRIBUTES sa; ZeroMemory(&sa, sizeof(sa)); HANDLE hFile = CreateFile(FileName, GENERIC_READ, FILE_SHARE_READ, &sa, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); if( hFile != INVALID_HANDLE_VALUE ) { CloseHandle(hFile); hRealmlist = _tfopen(FileName, _T("wb")); } } } |
You may notice MoP isn’t here at all, since 5.0.4 the realmlist has been housed in Config.wtf – so that’ll be handled elsewhere.
With that, we now know where the realmlist is, and it’s open for writing. The writing part is simple enough:
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if( hRealmlist ) { size_t max = _tcslen(realmlist)+1; if( max == 1 ) max = 5; #ifdef UNICODE char *temp = new char[max]; ZeroMemory(temp, _msize(temp)); if( wcstombs(temp, realmlist, max) != -1 ) { if( fwrite(temp, strlen(temp), 1, hRealmlist) != 1 ) { delete[] temp; fclose(hRealmlist); return false; } } delete[] temp; #else if( fwrite(realmlist, strlen(realmlist), 1, hRealmlist) != 1 ) { fclose(hRealmlist); return false; } #endif fclose(hRealmlist); } |
With that, it should have written the realmlist. Here’s the final function:
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bool SetRealmlist(const TCHAR *realmlist, bool force) { HANDLE hFind; WIN32_FIND_DATA FindFileData; FILE *hRealmlist = NULL; bool bSearch = true; TCHAR DirPath[MAX_PATH]; TCHAR FileName[MAX_PATH]; _tcscpy(FileName, (*sActive).Install.c_str()); _tcscat(FileName, _T("\\Wow.exe")); DWORD dwDummy, dwLen = GetFileVersionInfoSize(FileName, &dwDummy); if( dwLen ) { BYTE *versionInfo = new BYTE[dwLen]; if( versionInfo ) { if( GetFileVersionInfo(FileName, NULL, dwLen, versionInfo) ) { UINT uLen; VS_FIXEDFILEINFO *ffi; if( VerQueryValue(versionInfo, _T("\\"), (LPVOID *)&ffi, &uLen) != 0 ) { if( HIWORD(ffi->dwFileVersionMS) >= 3 ) { // Realmlist is in \Data\RegionCode\ (eg: \Data\enUS) _tcscpy(DirPath, (*sActive).Install.c_str()); _tcscat(DirPath, _T("\\Data\\*")); _tcscpy(FileName, (*sActive).Install.c_str()); _tcscat(FileName, _T("\\Data\\")); // find the first file hFind = FindFirstFile(DirPath, &FindFileData); if( hFind == INVALID_HANDLE_VALUE) return false; _tcscpy(DirPath, FileName); while( bSearch ) { if( FindNextFile(hFind, &FindFileData) ) { if( !_tcscmp(FindFileData.cFileName, _T(".")) || !_tcscmp(FindFileData.cFileName, _T("..")) ) continue; _tcscat(FileName, FindFileData.cFileName); if( FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ) { TCHAR *ConfigLocale = GetConfigLocale(const_cast<TCHAR *>((*sActive).Install.c_str())); // Read locale from config to match if( (ConfigLocale != NULL && !_tcscmp(ConfigLocale, _T("")) && _tcscmp(FindFileData.cFileName, ConfigLocale)) || _tcslen(FindFileData.cFileName) == 4 ) // if they don't match, just make sure it's a RegionCode like enUS enGB frFR deDE etc { _tcscat(FileName, _T("\\realmlist.wtf")); if( force ) { hRealmlist = _tfopen(FileName, _T("wb")); bSearch = false; } else { SECURITY_ATTRIBUTES sa; ZeroMemory(&sa, sizeof(sa)); HANDLE hFile = CreateFile(FileName, GENERIC_READ, FILE_SHARE_READ, &sa, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); if( hFile != INVALID_HANDLE_VALUE ) { CloseHandle(hFile); hRealmlist = _tfopen(FileName, _T("wb")); bSearch = false; } } } if( ConfigLocale != NULL ) delete[] ConfigLocale; } _tcscpy(FileName, DirPath); } else { if( GetLastError() == ERROR_NO_MORE_FILES ) bSearch = false; } } FindClose(hFind); } else { // Realmlist is in root _tcscpy(FileName, (*sActive).Install.c_str()); _tcscat(FileName, _T("\\realmlist.wtf")); if( force ) hRealmlist = _tfopen(FileName, _T("wb")); else { SECURITY_ATTRIBUTES sa; ZeroMemory(&sa, sizeof(sa)); HANDLE hFile = CreateFile(FileName, GENERIC_READ, FILE_SHARE_READ, &sa, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); if( hFile != INVALID_HANDLE_VALUE ) { CloseHandle(hFile); hRealmlist = _tfopen(FileName, _T("wb")); } } } } } delete [] versionInfo; } } if( hRealmlist ) { size_t max = _tcslen(realmlist)+1; if( max == 1 ) max = 5; #ifdef UNICODE char *temp = new char[max]; ZeroMemory(temp, _msize(temp)); if( wcstombs(temp, realmlist, max) != -1 ) { if( fwrite(temp, strlen(temp), 1, hRealmlist) != 1 ) { delete[] temp; fclose(hRealmlist); return false; } } delete[] temp; #else if( fwrite(realmlist, strlen(realmlist), 1, hRealmlist) != 1 ) { fclose(hRealmlist); return false; } #endif fclose(hRealmlist); } else if( !force && MessageBox(NULL, _T("Cannot find realmlist.wtf! Would you like to create it?"), _T("Missing!"), MB_ICONQUESTION | MB_YESNO) == IDYES ) { bool res = SetRealmlist(realmlist, true); if( !res ) MessageBox(NULL, _T("Cannot create realmlist.wtf! Please report this error!"), _T("Error!"), MB_ICONERROR | MB_OK); return res; } else return false; return true; } |
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