1 files changed, 5 insertions, 0 deletions
diff --git a/app/ntp.c b/app/ntp.c
index 2aa33e4..f8ca357 100644
--- a/app/ntp.c
+++ b/app/ntp.c
@@ -78,6 +78,11 @@ static void ntp_rx (void *arg, struct udp_pcb *s, struct pbuf *p, struct ip_addr
 
     if (p->len < sizeof (ntp_packet_t)) break;
 
+    if (!pll_valid) break;
+
+    if (!time_known) break;
+
+
     memcpy (&pkt, p->payload, sizeof (ntp_packet_t));
     pbuf_realloc (p, sizeof (ntp_packet_t));