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/***************************************************************************
* nbase_time.c -- Some small time-related utility/compatibility *
* functions. *
* *
***********************IMPORTANT NMAP LICENSE TERMS************************
*
* The Nmap Security Scanner is (C) 1996-2023 Nmap Software LLC ("The Nmap
* Project"). Nmap is also a registered trademark of the Nmap Project.
*
* This program is distributed under the terms of the Nmap Public Source
* License (NPSL). The exact license text applying to a particular Nmap
* release or source code control revision is contained in the LICENSE
* file distributed with that version of Nmap or source code control
* revision. More Nmap copyright/legal information is available from
* https://nmap.org/book/man-legal.html, and further information on the
* NPSL license itself can be found at https://nmap.org/npsl/ . This
* header summarizes some key points from the Nmap license, but is no
* substitute for the actual license text.
*
* Nmap is generally free for end users to download and use themselves,
* including commercial use. It is available from https://nmap.org.
*
* The Nmap license generally prohibits companies from using and
* redistributing Nmap in commercial products, but we sell a special Nmap
* OEM Edition with a more permissive license and special features for
* this purpose. See https://nmap.org/oem/
*
* If you have received a written Nmap license agreement or contract
* stating terms other than these (such as an Nmap OEM license), you may
* choose to use and redistribute Nmap under those terms instead.
*
* The official Nmap Windows builds include the Npcap software
* (https://npcap.com) for packet capture and transmission. It is under
* separate license terms which forbid redistribution without special
* permission. So the official Nmap Windows builds may not be redistributed
* without special permission (such as an Nmap OEM license).
*
* Source is provided to this software because we believe users have a
* right to know exactly what a program is going to do before they run it.
* This also allows you to audit the software for security holes.
*
* Source code also allows you to port Nmap to new platforms, fix bugs, and add
* new features. You are highly encouraged to submit your changes as a Github PR
* or by email to the dev@nmap.org mailing list for possible incorporation into
* the main distribution. Unless you specify otherwise, it is understood that
* you are offering us very broad rights to use your submissions as described in
* the Nmap Public Source License Contributor Agreement. This is important
* because we fund the project by selling licenses with various terms, and also
* because the inability to relicense code has caused devastating problems for
* other Free Software projects (such as KDE and NASM).
*
* The free version of Nmap 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. Warranties,
* indemnification and commercial support are all available through the
* Npcap OEM program--see https://nmap.org/oem/
*
***************************************************************************/
/* $Id$ */
#include "nbase.h"
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <time.h>
#ifdef WIN32
#include <sys/timeb.h>
#include <winsock2.h>
#endif
#ifndef HAVE_USLEEP
void usleep(unsigned long usec) {
#ifdef HAVE_NANOSLEEP
struct timespec ts;
ts.tv_sec = usec / 1000000;
ts.tv_nsec = (usec % 1000000) * 1000;
nanosleep(&ts, NULL);
#else /* Windows style */
Sleep( usec / 1000 );
#endif /* HAVE_NANOSLEEP */
}
#endif
/* Thread safe time stuff */
#ifdef WIN32
/* On Windows, use CRT function localtime_s:
* errno_t localtime_s(
* struct tm* const tmDest,
* time_t const* const sourceTime
* );
*/
int n_localtime(const time_t *timer, struct tm *result) {
return localtime_s(result, timer);
}
int n_gmtime(const time_t *timer, struct tm *result) {
return gmtime_s(result, timer);
}
int n_ctime(char *buffer, size_t bufsz, const time_t *timer) {
return ctime_s(buffer, bufsz, timer);
}
#else /* WIN32 */
#include <errno.h>
#ifdef HAVE_LOCALTIME_S
/* C11 localtime_s similar to Posix localtime_r, but with validity checking:
* struct tm *localtime_s(const time_t *restrict time, struct tm *restrict result);
*/
int n_localtime(const time_t *timer, struct tm *result) {
struct tm *tmp = localtime_s(timer, result);
if (!tmp) {
return errno;
}
return 0;
}
int n_gmtime(const time_t *timer, struct tm *result) {
struct tm *tmp = gmtime_s(timer, result);
if (!tmp) {
return errno;
}
return 0;
}
int n_ctime(char *buffer, size_t bufsz, const time_t *timer) {
return ctime_s(buffer, bufsz, timer);
}
#else
#ifdef HAVE_LOCALTIME_R
/* POSIX localtime_r thread-safe localtime function:
* struct tm *localtime_r(const time_t *timep, struct tm *result);
*/
int n_localtime(const time_t *timer, struct tm *result) {
struct tm *tmp = localtime_r(timer, result);
if (!tmp) {
return errno;
}
return 0;
}
int n_gmtime(const time_t *timer, struct tm *result) {
struct tm *tmp = gmtime_r(timer, result);
if (!tmp) {
return errno;
}
return 0;
}
int n_ctime(char *buffer, size_t bufsz, const time_t *timer) {
char *tmp = ctime_r(timer, buffer);
if (!tmp) {
return errno;
}
return 0;
}
#else
/* No thread-safe alternatives. */
// Using C99's one-line commments since LGTM.com does not recognize C-style
// block comments. This may cause problems, but only for very old systems
// without a C99-compatible compiler that do not have localtime_r or
// localtime_s
int n_localtime(const time_t *timer, struct tm *result) {
struct tm *tmp = localtime(timer); // lgtm[cpp/potentially-dangerous-function]
if (tmp)
*result = *tmp;
else
return errno;
return 0;
}
int n_gmtime(const time_t *timer, struct tm *result) {
struct tm *tmp = gmtime(timer); // lgtm[cpp/potentially-dangerous-function]
if (tmp)
*result = *tmp;
else
return errno;
return 0;
}
int n_ctime(char *buffer, size_t bufsz, const time_t *timer) {
char *tmp = ctime(timer); // lgtm[cpp/potentially-dangerous-function]
if (tmp)
Strncpy(buffer, tmp, bufsz);
else
return errno;
return 0;
}
#endif /* HAVE_LOCALTIME_R */
#endif /* HAVE_LOCALTIME_S */
#endif /* WIN32 */
#ifdef WIN32
int gettimeofday(struct timeval *tv, struct timeval *tz)
{
struct _timeb timebuffer;
_ftime( &timebuffer );
tv->tv_sec = (long) timebuffer.time;
tv->tv_usec = timebuffer.millitm * 1000;
return 0;
};
unsigned int sleep(unsigned int seconds)
{
Sleep(1000*seconds);
return(0);
};
#endif /* WIN32 */
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