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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) 2012-2022 OpenVPN Inc.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License Version 3
// as published by the Free Software Foundation.
//
// 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program in the COPYING file.
// If not, see <http://www.gnu.org/licenses/>.
// Function to return the current date/time as a string.
#ifndef OPENVPN_TIME_TIMESTR_H
#define OPENVPN_TIME_TIMESTR_H
#include <string>
#include <cstring> // for std::strlen and std::memset
#include <time.h>
#include <stdio.h>
#include <ctype.h>
#include <cstdint> // for std::uint64_t
#include <openvpn/common/platform.hpp>
#include <openvpn/common/size.hpp>
#include <openvpn/common/string.hpp>
#if defined(OPENVPN_PLATFORM_WIN)
#include <windows.h>
#else
#include <sys/time.h>
#endif
namespace openvpn {
#if defined(OPENVPN_PLATFORM_WIN)
inline std::string date_time(const time_t now)
{
struct tm *lt = localtime(&now);
char *ret = asctime(lt);
const size_t len = std::strlen(ret);
if (len > 0 && ret[len - 1] == '\n')
ret[len - 1] = '\0';
return ret;
}
inline std::string date_time()
{
const time_t now = time(NULL);
return date_time(now);
}
inline std::string date_time_store_time_t(time_t &save)
{
save = time(NULL);
return date_time(save);
}
#else
inline std::string date_time(const time_t t)
{
struct tm lt;
char buf[64];
std::memset(<, 0, sizeof(lt));
if (!localtime_r(&t, <))
return "LOCALTIME_ERROR";
if (!asctime_r(<, buf))
return "ASCTIME_ERROR";
const size_t len = std::strlen(buf);
if (len > 0 && buf[len - 1] == '\n')
buf[len - 1] = '\0';
return std::string(buf);
}
inline std::string date_time_utc(const time_t t)
{
struct tm lt;
char buf[64];
std::memset(<, 0, sizeof(lt));
if (!gmtime_r(&t, <))
return "GMTIME_ERROR";
if (!asctime_r(<, buf))
return "ASCTIME_ERROR";
const size_t len = std::strlen(buf);
if (len > 0 && buf[len - 1] == '\n')
buf[len - 1] = '\0';
return std::string(buf);
}
// msecs == false : Tue Feb 17 01:24:30 2015
// msecs == true : Tue Feb 17 01:24:30.123 2015
inline std::string date_time(const struct timeval *tv, const bool msecs)
{
const std::string dt = date_time(tv->tv_sec);
if (msecs)
{
// find correct position in string to insert milliseconds
const size_t pos = dt.find_last_of(':');
if (pos != std::string::npos
&& pos + 3 < dt.length()
&& string::is_digit(dt[pos + 1])
&& string::is_digit(dt[pos + 2])
&& string::is_space(dt[pos + 3]))
{
char ms[5];
::snprintf(ms, sizeof(ms), ".%03u", static_cast<unsigned int>(tv->tv_usec / 1000));
return dt.substr(0, pos + 3) + ms + dt.substr(pos + 3);
}
}
return dt;
}
inline std::string nanosec_time_to_string(const std::uint64_t ns_time)
{
const std::uint64_t sec = ns_time / std::uint64_t(1000000000);
const std::uint64_t ns = ns_time % std::uint64_t(1000000000);
const std::string dt = date_time_utc(sec);
// find correct position in string to insert nanoseconds
const size_t pos = dt.find_last_of(':');
if (pos != std::string::npos
&& pos + 3 < dt.length()
&& string::is_digit(dt[pos + 1])
&& string::is_digit(dt[pos + 2])
&& string::is_space(dt[pos + 3]))
{
char ms[11];
::snprintf(ms, sizeof(ms), ".%09u", (unsigned int)ns);
return dt.substr(0, pos + 3) + ms + dt.substr(pos + 3);
}
return dt;
}
inline std::string date_time()
{
struct timeval tv;
if (::gettimeofday(&tv, nullptr) < 0)
{
tv.tv_sec = 0;
tv.tv_usec = 0;
}
return date_time(&tv, true);
}
inline std::string date_time_store_time_t(time_t &save)
{
struct timeval tv;
if (::gettimeofday(&tv, nullptr) < 0)
{
tv.tv_sec = 0;
tv.tv_usec = 0;
}
save = tv.tv_sec;
return date_time(&tv, true);
}
#endif
inline std::string date_time_rfc822(const time_t t)
{
struct tm lt;
char buf[64];
#if defined(OPENVPN_PLATFORM_WIN)
if (gmtime_s(<, &t))
return "";
// MinGW doesn't yet support %T, so use %H:%M:%S
// https://sourceforge.net/p/mingw-w64/bugs/793/
if (!strftime(buf, sizeof(buf), "%a, %d %b %Y %H:%M:%S GMT", <))
return "";
#else
if (!gmtime_r(&t, <))
return "";
if (!strftime(buf, sizeof(buf), "%a, %d %b %Y %T %Z", <))
return "";
#endif
return std::string(buf);
}
inline std::string date_time_rfc822()
{
return date_time_rfc822(::time(nullptr));
}
} // namespace openvpn
#endif
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