From 87e334a2d516e215baba8bf0743612462c5e7fce Mon Sep 17 00:00:00 2001
From: Ken Bannister <kb2ma@runbox.com>
Date: Sun, 14 Jan 2018 07:07:22 -0500
Subject: [PATCH] net/nanocoap: add macro for timeout calculation
---
sys/include/net/nanocoap.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/sys/include/net/nanocoap.h b/sys/include/net/nanocoap.h
index 0eb869c6a9..5b113eedc8 100644
--- a/sys/include/net/nanocoap.h
+++ b/sys/include/net/nanocoap.h
@@ -192,6 +192,15 @@ extern "C" {
*/
#define COAP_ACK_TIMEOUT (2U)
#define COAP_RANDOM_FACTOR (1.5)
+
+/**
+ * @brief Maximum variation for confirmable timeout.
+ *
+ * Must be an integer, defined as:
+ *
+ * (COAP_ACK_TIMEOUT * COAP_RANDOM_FACTOR) - COAP_ACK_TIMEOUT
+ */
+#define COAP_ACK_VARIANCE (1U)
#define COAP_MAX_RETRANSMIT (4)
#define COAP_NSTART (1)
#define COAP_DEFAULT_LEISURE (5)
--
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