From dd1c09173695191334e83fa5c75a5e26668d713e Mon Sep 17 00:00:00 2001
From: Jan Janak <jan@janakj.org>
Date: Sat, 19 Mar 2022 23:32:03 -0400
Subject: [PATCH] Implement new McpsRetransmit primitive

The primitive will be invoked whenever the LoRaMac-node library
retransmits an uplink message. This could be used by the application to
get notified of uplink retransmissions.
---
 src/mac/LoRaMac.c | 5 +++++
 src/mac/LoRaMac.h | 6 ++++++
 2 files changed, 11 insertions(+)

diff --git a/src/mac/LoRaMac.c b/src/mac/LoRaMac.c
index 91e303b35..461ca61dd 100644
--- a/src/mac/LoRaMac.c
+++ b/src/mac/LoRaMac.c
@@ -3331,6 +3331,11 @@ LoRaMacStatus_t SendFrameOnChannel( uint8_t channel )
     // Send now
     Radio.Send( MacCtx.PktBuffer, MacCtx.PktBufferLen );
 
+    if(MacCtx.ChannelsNbTransCounter != 1 && MacCtx.MacPrimitives->MacMcpsRetransmit != NULL)
+    {
+        MacCtx.MacPrimitives->MacMcpsRetransmit( );
+    }
+
     return LORAMAC_STATUS_OK;
 }
 
diff --git a/src/mac/LoRaMac.h b/src/mac/LoRaMac.h
index ef408ca8e..390c35be9 100644
--- a/src/mac/LoRaMac.h
+++ b/src/mac/LoRaMac.h
@@ -2476,6 +2476,12 @@ typedef struct sLoRaMacPrimitives
      * \param   [OUT] MCPS-Confirm parameters
      */
     void ( *MacMcpsConfirm )( McpsConfirm_t* McpsConfirm );
+    /*!
+     * \brief   MCPS-Retransmit primitive
+     *
+     * \param   [OUT] MCPS-Retransmit parameters
+     */
+    void ( *MacMcpsRetransmit )( void );
     /*!
      * \brief   MCPS-Indication primitive
      *