From 82483073f09916cc81e113d46d9f41829a69f334 Mon Sep 17 00:00:00 2001
From: goldsimon <goldsimon@gmx.de>
Date: Sun, 17 Dec 2017 22:13:09 +0100
Subject: [PATCH] sntp_send_request: assert that argument 'server_addr' != NULL

---
 src/apps/sntp/sntp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/apps/sntp/sntp.c b/src/apps/sntp/sntp.c
index 8ae2ec65..ec8ffa7d 100644
--- a/src/apps/sntp/sntp.c
+++ b/src/apps/sntp/sntp.c
@@ -532,6 +532,9 @@ static void
 sntp_send_request(const ip_addr_t *server_addr)
 {
   struct pbuf *p;
+
+  LWIP_ASSERT("server_addr != NULL", server_addr != NULL);
+
   p = pbuf_alloc(PBUF_TRANSPORT, SNTP_MSG_LEN, PBUF_RAM);
   if (p != NULL) {
     struct sntp_msg *sntpmsg = (struct sntp_msg *)p->payload;