1 files changed, 215 insertions, 0 deletions
diff --git a/nbase/nbase_time.c b/nbase/nbase_time.c
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@@ -0,0 +1,215 @@
+
+/***************************************************************************
+ * 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 */
+