From ae9429fc2063d64cd12c329f290458b5267cfa04 Mon Sep 17 00:00:00 2001
From: Olaf Bergmann <bergmann@tzi.org>
Date: Fri, 13 Nov 2020 09:25:20 +0100
Subject: [PATCH] coap_debug.c: Check value of COAP_DEBUG_BUF_SIZE

The technical lower bound of COAP_DEBUG_BUF_SIZE in the code is 5.
Sensible values should be significantly larger than 32 to ensure that
information can be displayed through this buffer.
---
 src/coap_debug.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/coap_debug.c b/src/coap_debug.c
index 0a07122c..176f0610 100644
--- a/src/coap_debug.c
+++ b/src/coap_debug.c
@@ -473,6 +473,10 @@ is_binary(int content_format) {
  *
  */
 
+#if COAP_DEBUG_BUF_SIZE < 5
+#error "COAP_DEBUG_BUF_SIZE must be at least 5, should be >= 32 to be useful"
+#endif /* COAP_DEBUG_BUF_SIZE < 5 */
+
 void
 coap_show_pdu(coap_log_t level, const coap_pdu_t *pdu) {
 #if COAP_CONSTRAINED_STACK