From 42122b7f734e36656fbf6679e3a11d45c0a33a7d Mon Sep 17 00:00:00 2001
From: Juha Heiskanen <juha.heiskanen@arm.com>
Date: Thu, 16 Aug 2018 15:00:59 +0300
Subject: [PATCH] Added support to report Driver if FHSS return unknow neighbor
 error.

---
 source/MAC/IEEE802_15_4/mac_defines.h  | 3 ++-
 source/MAC/IEEE802_15_4/mac_mcps_sap.c | 2 ++
 source/MAC/IEEE802_15_4/mac_pd_sap.c   | 6 ++++++
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/source/MAC/IEEE802_15_4/mac_defines.h b/source/MAC/IEEE802_15_4/mac_defines.h
index 9315d36e95c..71e63a93366 100644
--- a/source/MAC/IEEE802_15_4/mac_defines.h
+++ b/source/MAC/IEEE802_15_4/mac_defines.h
@@ -37,7 +37,8 @@ typedef enum mac_event_t {
     MAC_TIMER_ACK,
     MAC_TIMER_CCA,
     MAC_TX_FAIL,
-    MAC_TX_TIMEOUT
+    MAC_TX_TIMEOUT,
+    MAC_UNKNOWN_DESTINATION,
 } mac_event_t;
 
 typedef enum mac_tx_status_type_t {
diff --git a/source/MAC/IEEE802_15_4/mac_mcps_sap.c b/source/MAC/IEEE802_15_4/mac_mcps_sap.c
index 7a42bab4f4f..7c87456621b 100644
--- a/source/MAC/IEEE802_15_4/mac_mcps_sap.c
+++ b/source/MAC/IEEE802_15_4/mac_mcps_sap.c
@@ -1359,6 +1359,8 @@ static void mac_common_data_confirmation_handle (protocol_interface_rf_mac_setup
             //Enable Radio
             mac_mlme_mac_radio_enable(rf_mac_setup);
             buf->status = MLME_TRANSACTION_EXPIRED;
+        } else if (m_event == MAC_UNKNOWN_DESTINATION) {
+            buf->status = MLME_UNAVAILABLE_KEY;
         }
     }
 }
diff --git a/source/MAC/IEEE802_15_4/mac_pd_sap.c b/source/MAC/IEEE802_15_4/mac_pd_sap.c
index 98586cf813a..fef90d52807 100644
--- a/source/MAC/IEEE802_15_4/mac_pd_sap.c
+++ b/source/MAC/IEEE802_15_4/mac_pd_sap.c
@@ -254,6 +254,9 @@ void mac_pd_sap_state_machine(protocol_interface_rf_mac_setup_s *rf_mac_setup)
                 if (tx_handle_retval == -3) {
                     mac_tx_done_state_set(rf_mac_setup, MAC_CCA_FAIL);
                     return;
+                } else if (tx_handle_retval == -2) {
+                    mac_tx_done_state_set(rf_mac_setup, MAC_UNKNOWN_DESTINATION);
+                    return;
                 }
             }
             if (mac_plme_cca_req(rf_mac_setup) != 0) {
@@ -361,6 +364,9 @@ static int8_t mac_data_interface_tx_done_cb(protocol_interface_rf_mac_setup_s *r
                 if (tx_handle_retval == -3) {
                     mac_tx_done_state_set(rf_ptr, MAC_CCA_FAIL);
                     return -3;
+                } else if (tx_handle_retval == -2) {
+                    mac_tx_done_state_set(rf_ptr, MAC_UNKNOWN_DESTINATION);
+                    return -2;
                 }
             }
         }