From 82e0d5a9b05c9e79eab01317070042e8dbb009e4 Mon Sep 17 00:00:00 2001
From: Jose Alamos <jose.alamos@haw-hamburg.de>
Date: Mon, 31 Aug 2020 14:29:10 +0200
Subject: [PATCH] net/ieee802154: add default CSMA-CA params

---
 sys/include/net/ieee802154.h          | 21 +++++++++++++++++++++
 sys/net/link_layer/ieee802154/Kconfig | 12 ++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/sys/include/net/ieee802154.h b/sys/include/net/ieee802154.h
index 42c5cf776a6e1..11bc3b1257f35 100644
--- a/sys/include/net/ieee802154.h
+++ b/sys/include/net/ieee802154.h
@@ -203,6 +203,27 @@ extern const uint8_t ieee802154_addr_bcast[IEEE802154_ADDR_BCAST_LEN];
 #endif
 /** @} */
 
+/**
+ * @brief IEEE802.15.4 default value for minimum backoff exponent
+ */
+#ifndef CONFIG_IEEE802154_DEFAULT_CSMA_CA_MIN_BE
+#define CONFIG_IEEE802154_DEFAULT_CSMA_CA_MIN_BE   (3U)
+#endif
+
+/**
+ * @brief IEEE802.15.4 default value for maximum number of CSMA-CA retries.
+ */
+#ifndef CONFIG_IEEE802154_DEFAULT_CSMA_CA_RETRIES
+#define CONFIG_IEEE802154_DEFAULT_CSMA_CA_RETRIES  (4U)
+#endif
+
+/**
+ * @brief IEEE802.15.4 default value for maximum backoff exponent
+ */
+#ifndef CONFIG_IEEE802154_DEFAULT_CSMA_CA_MAX_BE
+#define CONFIG_IEEE802154_DEFAULT_CSMA_CA_MAX_BE   (5U)
+#endif
+
 /**
  * @brief   Initializes an IEEE 802.15.4 MAC frame header in @p buf.
  *
diff --git a/sys/net/link_layer/ieee802154/Kconfig b/sys/net/link_layer/ieee802154/Kconfig
index 340df72be7c75..c063a97bbc0a5 100644
--- a/sys/net/link_layer/ieee802154/Kconfig
+++ b/sys/net/link_layer/ieee802154/Kconfig
@@ -33,4 +33,16 @@ if KCONFIG_MODULE_IEEE802154
         int "IEEE802.15.4 default TX power (in dBm)"
         default 0
 
+    config IEEE802154_DEFAULT_CSMA_CA_MIN
+        int "IEEE802.15.4 default CSMA-CA minimum backoff exponent"
+        default 3
+
+    config IEEE802154_DEFAULT_CSMA_CA_RETRIES
+        int "IEEE802.15.4 default CSMA-CA maximum number of retries"
+        default 4
+
+    config IEEE802154_DEFAULT_CSMA_CA_MAX
+        int "IEEE802.15.4 default CSMA-CA maximum backoff exponent"
+        default 5
+
 endif # KCONFIG_MODULE_IEEE802154