From c33eb2b2778420e7a7a81e9c07d86eae7a271722 Mon Sep 17 00:00:00 2001
From: Koen Zandberg <koen@bergzand.net>
Date: Thu, 3 Aug 2017 00:03:20 +0200
Subject: [PATCH] netopt: add NETOPT_TX_RETRIES_NEEDED

---
 sys/include/net/netopt.h           | 9 +++++++++
 sys/net/crosslayer/netopt/netopt.c | 1 +
 2 files changed, 10 insertions(+)

diff --git a/sys/include/net/netopt.h b/sys/include/net/netopt.h
index 810051762b..6fba559496 100644
--- a/sys/include/net/netopt.h
+++ b/sys/include/net/netopt.h
@@ -340,6 +340,15 @@ typedef enum {
      */
     NETOPT_IQ_INVERT,
 
+    /**
+     * @brief   Get retry amount from missing ACKs of the last transmission
+     *
+     * This retrieves the number of retries needed for the last transmissions.
+     * Only retransmissions due to missing ACK packets are considered.
+     * Retries due to CCA failures are not counted.
+     */
+    NETOPT_TX_RETRIES_NEEDED,
+
     /* add more options if needed */
 
     /**
diff --git a/sys/net/crosslayer/netopt/netopt.c b/sys/net/crosslayer/netopt/netopt.c
index b4842a5895..59fea27ea3 100644
--- a/sys/net/crosslayer/netopt/netopt.c
+++ b/sys/net/crosslayer/netopt/netopt.c
@@ -74,6 +74,7 @@ static const char *_netopt_strmap[] = {
     [NETOPT_CHANNEL_HOP_PERIOD]    = "NETOPT_CHANNEL_HOP_PERIOD",
     [NETOPT_FIXED_HEADER]          = "NETOPT_FIXED_HEADER",
     [NETOPT_IQ_INVERT]             = "NETOPT_IQ_INVERT",
+    [NETOPT_TX_RETRIES_NEEDED]     = "NETOPT_TX_RETRIES_NEEDED",
     [NETOPT_NUMOF]                 = "NETOPT_NUMOF",
 };