Immutable payload pointer in LoRaPHY

Author: Hasnain Virk

features/lorawan/lorastack/phy/LoRaPHY.cpp

@@ -307,7 +307,7 @@ lorawan_time_t LoRaPHY::update_band_timeoff(bool joined, bool duty_cycle,
     return next_tx_delay;
 }
 
-uint8_t LoRaPHY::parse_link_ADR_req(uint8_t* payload, link_adr_params_t* params)
+uint8_t LoRaPHY::parse_link_ADR_req(const uint8_t* payload, link_adr_params_t* params)
 {
     uint8_t ret_index = 0;
 

features/lorawan/lorastack/phy/LoRaPHY.h

@@ -578,7 +578,7 @@ class LoRaPHY : private mbed::NonCopyable<LoRaPHY> {
     /**
      * Parses the parameter of an LinkAdrRequest.
      */
-    uint8_t parse_link_ADR_req(uint8_t* payload, link_adr_params_t* adr_params);
+    uint8_t parse_link_ADR_req(const uint8_t* payload, link_adr_params_t* adr_params);
 
     /**
      * Verifies and updates the datarate, the TX power and the number of repetitions

features/lorawan/lorastack/phy/lora_phy_ds.h

@@ -564,7 +564,7 @@ typedef struct
     /*!
      * A pointer to the payload containing the MAC commands.
      */
-    uint8_t* payload;
+    const uint8_t* payload;
     /*!
      * The size of the payload.
      */