From e368dd50dc182b9604a3a2a000e74d96592c2f91 Mon Sep 17 00:00:00 2001
From: "Hansi, dl9rdz" <dl9rdz@darc.de>
Date: Sat, 29 May 2021 14:03:28 +0200
Subject: [PATCH] +time check for SondeHub

---
 RX_FSK/RX_FSK.ino | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/RX_FSK/RX_FSK.ino b/RX_FSK/RX_FSK.ino
index 7739100..43e4774 100644
--- a/RX_FSK/RX_FSK.ino
+++ b/RX_FSK/RX_FSK.ino
@@ -3015,6 +3015,8 @@ const char *dfmSubtypeStrSH[16] = { NULL, NULL, NULL, NULL, NULL, NULL,
                                     NULL, NULL
                                   };
 
+// in hours.... max allowed diff UTC <-> sonde time
+#define SONDEHUB_TIME_THRESHOLD (3) 
 void sondehub_send_data(WiFiClient *client, SondeInfo *s, struct st_sondehub *conf) {
   Serial.println("sondehub_send_data()");
 
@@ -3060,16 +3062,23 @@ void sondehub_send_data(WiFiClient *client, SondeInfo *s, struct st_sondehub *co
   }
 
   struct tm timeinfo;
-  if(!getLocalTime(&timeinfo, 0)){
+  time_t now;
+  time(&now);
+  gmtime_r(&now, &timeinfo);
+  if(timeinfo.tm_year <= (2016-1900)) {
     Serial.println("Failed to obtain time");
     return;
   }
+  if( abs(now - s->time) > (3600*SONDEHUB_TIME_THRESHOLD) ) {
+    Serial.println("Sonde time too far from current UTC time");
+    return;
+  }
 
   if ( s->type == STYPE_RS41 || s->type == STYPE_RS92 || s->type == STYPE_M10 || s->type == STYPE_M20 ) {
     t += 18;	// convert back to GPS time from UTC time +18s
   }
 
-  ts = *gmtime(&t);
+  gmtime_r(&t, &ts);
 
   memset(rs_msg, 0, MSG_SIZE);
   w = rs_msg;