From 6e5806017b5532c5447c527be7b09e4e7058af84 Mon Sep 17 00:00:00 2001
From: Jan Romann <jan.romann@uni-bremen.de>
Date: Tue, 22 Nov 2022 18:31:15 +0100
Subject: [PATCH] dtls_debug: address WIndows warning for localtime

---
 dtls_debug.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/dtls_debug.c b/dtls_debug.c
index 5f88e6c1..4f93e606 100644
--- a/dtls_debug.c
+++ b/dtls_debug.c
@@ -77,6 +77,8 @@ static const char *loglevels[] = {
 
 #ifdef HAVE_TIME_H
 
+#ifndef IS_WINDOWS
+
 static inline size_t
 print_timestamp(char *s, size_t len, time_t t) {
   struct tm *tmp;
@@ -84,6 +86,21 @@ print_timestamp(char *s, size_t len, time_t t) {
   return strftime(s, len, "%b %d %H:%M:%S", tmp);
 }
 
+#else
+
+static inline size_t
+print_timestamp(char *s, size_t len, time_t t) {
+  struct tm tmp;
+  errno_t err = localtime_s(&tmp, &t);
+  if (err) {
+      printf("Invalid argument to localtime_s.");
+      exit(1);
+  }
+  return strftime(s, len, "%b %d %H:%M:%S", &tmp);
+}
+
+#endif
+
 #else /* alternative implementation: just print the timestamp */
 
 static inline size_t