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#include "stdafx.h"
#include "../error.h"
#include "trayparser.h"
#include "trayjuggler.h"
#include "resource.h"
#include <windows.h>
#include <log/log.h>
#include <libcommon/string.h>
#include <libcommon/error.h>
#include <libcommon/registry/registry.h>
#include <libcommon/resourcedata.h>
#include <libcommon/filesystem.h>
#include <libcommon/process/process.h>
#include <libcommon/security.h>
#include <nsis/pluginapi.h>
#include <filesystem>
namespace
{
EXTERN_C IMAGE_DOS_HEADER __ImageBase;
void InjectMullvadRecord(TrayJuggler &juggler)
{
//
// There's no existing mullvad tray record in the system.
// Load a template mullvad record, which is then fixed up and injected.
//
auto moduleHandle = reinterpret_cast<HMODULE>(&__ImageBase);
auto resource = common::resourcedata::LoadBinaryResource(moduleHandle, MULLVAD_TRAY_RECORD);
if (resource.size != sizeof(ICON_STREAMS_RECORD))
{
THROW_ERROR("Invalid tray template, size mismatch");
}
ICON_STREAMS_RECORD newRecord(*reinterpret_cast<const ICON_STREAMS_RECORD *>(resource.data));
juggler.injectRecord(newRecord);
}
void UpdateRegistry(common::registry::RegistryKey ®key, const std::wstring &valueName, const TrayJuggler &juggler)
{
//
// Construct path to 'explorer.exe'
//
const auto windir = common::fs::GetKnownFolderPath(FOLDERID_Windows);
const auto explorer = std::filesystem::path(windir).append(L"explorer.exe");
//
// Determine process id of active instance(s).
// There's a setting in 'explorer' that will open all folder views as separate processes.
//
const auto pids = common::process::GetAllProcessIdsFromName(explorer);
if (pids.empty())
{
THROW_ERROR("Could not determine PID of explorer.exe");
}
//
// Make a copy of the process security context before we start terminating processes.
// Should we make an effort to choose the process that has been alive the longest?
//
auto context = common::security::DuplicateSecurityContext(*pids.begin());
size_t terminated = 0;
for (auto pid : pids)
{
auto handle = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
if (nullptr != handle)
{
//
// 'winlogon' is monitoring 'explorer' and immediately
// restarts it if the exit code is 0.
//
if (FALSE != TerminateProcess(handle, 1))
{
WaitForSingleObject(handle, INFINITE);
++terminated;
}
CloseHandle(handle);
}
}
if (0 == terminated)
{
THROW_ERROR("Could not terminate explorer.exe");
}
//
// We've terminated one/more instances of explorer.exe so we have to follow through.
//
if (pids.size() != terminated)
{
PluginLog(L"Could not terminate all instances of explorer.exe");
}
regkey.writeValue(valueName, juggler.pack());
common::process::RunInContext(*context, explorer);
}
} // anonymous namespace
//
// PromoteTrayIcon
//
// Ensure the GUI's tray icon is placed in the visible part of the notification area.
// This is accomplished by updating a binary blob in the registry.
//
void __declspec(dllexport) NSISCALL PromoteTrayIcon
(
HWND hwndParent,
int string_size,
LPTSTR variables,
stack_t **stacktop,
extra_parameters *extra,
...
)
{
EXDLL_INIT();
try
{
static const wchar_t keyName[] = L"Software\\Classes\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\TrayNotify";
static const wchar_t valueName[] = L"IconStreams";
auto regkey = common::registry::Registry::OpenKey(HKEY_CURRENT_USER, keyName, true);
TrayParser parser(regkey->readBinaryBlob(valueName));
TrayJuggler juggler(parser);
bool updateRegistry = true;
if (auto mullvadRecord = juggler.findRecord(L"Mullvad VPN"))
{
if (ICON_STREAMS_VISIBILITY::SHOW_ICON_AND_NOTIFICATIONS == mullvadRecord->Visibility)
{
updateRegistry = false;
}
else
{
juggler.promoteRecord(mullvadRecord);
}
}
else
{
InjectMullvadRecord(juggler);
}
//
// Only update the registry if the record/record set was updated.
//
if (updateRegistry)
{
UpdateRegistry(*regkey, valueName, juggler);
}
pushstring(L"");
pushint(NsisStatus::SUCCESS);
}
catch (std::exception &err)
{
pushstring(common::string::ToWide(err.what()).c_str());
pushint(NsisStatus::GENERAL_ERROR);
}
catch (...)
{
pushstring(L"Unspecified error");
pushint(NsisStatus::GENERAL_ERROR);
}
}
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