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// OpenVPN -- An application to securely tunnel IP networks
// over a single port, with support for SSL/TLS-based
// session authentication and key exchange,
// packet encryption, packet authentication, and
// packet compression.
//
// Copyright (C) 2012- OpenVPN Inc.
//
// SPDX-License-Identifier: MPL-2.0 OR AGPL-3.0-only WITH openvpn3-openssl-exception
//
#pragma once
#include <windows.h>
#include <string>
#include <openvpn/common/exception.hpp>
#include <openvpn/common/wstring.hpp>
#include <openvpn/time/timestr.hpp>
#include <openvpn/win/winerr.hpp>
#include <openvpn/win/secattr.hpp>
#include <openvpn/win/scoped_handle.hpp>
namespace openvpn::Win::LogUtil {
inline void log(const HANDLE file, const std::string &str)
{
DWORD n_written;
const std::string line = date_time() + ' ' + str;
::WriteFile(file, line.c_str(), static_cast<DWORD>(line.length()), &n_written, NULL);
}
inline ScopedHANDLE create_file(const std::string &fn,
const std::string &sddl_string,
bool append)
{
SecurityAttributes sa(sddl_string, true, fn); // fn passed as title only
const std::wstring wfn = wstring::from_utf8(fn);
ScopedHANDLE file(::CreateFileW(
wfn.c_str(),
GENERIC_WRITE,
FILE_SHARE_READ,
&sa.sa,
append ? OPEN_ALWAYS : CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL));
if (!file.defined())
{
const Win::LastError err;
OPENVPN_THROW_EXCEPTION("Win::LogFile: failed to open " << fn << " : " << err.message());
}
// append to logfile?
if (append)
{
if (::SetFilePointer(file(), 0, NULL, FILE_END) == INVALID_SET_FILE_POINTER)
{
const Win::LastError err;
OPENVPN_THROW_EXCEPTION("Win::LogFile: cannot append to " << fn << " : " << err.message());
}
}
return file;
}
} // namespace openvpn::Win::LogUtil
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