Method for adding network interface MAC address

Add method set_mac_address to set network interface MAC address.

features/nanostack/mbed-mesh-api/mbed-mesh-api/MeshInterfaceNanostack.h

@@ -29,6 +29,7 @@ public:
     MBED_DEPRECATED_SINCE("mbed-os-5.15", "String-based APIs are deprecated")
     virtual char *get_ip_address(char *buf, nsapi_size_t buflen);
     virtual char *get_mac_address(char *buf, nsapi_size_t buflen);
+    virtual nsapi_error_t set_mac_address(uint8_t *buf, nsapi_size_t buflen);
     virtual nsapi_error_t get_netmask(SocketAddress *address);
     MBED_DEPRECATED_SINCE("mbed-os-5.15", "String-based APIs are deprecated")
     virtual char *get_netmask(char *buf, nsapi_size_t buflen);
@@ -118,6 +119,9 @@ public:
     */
     virtual const char *get_mac_address();
 
+    /** @copydoc NetworkInterface::set_mac_address */
+    virtual nsapi_error_t set_mac_address(uint8_t *mac_addr, size_t addr_len);
+
     /** Register callback for status reporting
      *
      *  The specified status callback function will be called on status changes

features/nanostack/mbed-mesh-api/source/MeshInterfaceNanostack.cpp

@@ -61,6 +61,27 @@ char *Nanostack::Interface::get_mac_address(char *buf, nsapi_size_t buflen)
     }
 }
 
+nsapi_error_t Nanostack::Interface::set_mac_address(uint8_t *buf, nsapi_size_t buflen)
+{
+    if (buflen != 8) {
+        /* Provided MAC is too short */
+        return NSAPI_ERROR_PARAMETER;
+    }
+
+    if (_device_id >= 0) {
+        /* device is already registered, can't set MAC address anymore */
+        return NSAPI_ERROR_BUSY;
+    }
+
+    NanostackMACPhy *phy = interface_phy.nanostack_mac_phy();
+    if (phy) {
+        phy->set_mac_address(buf);
+        return NSAPI_ERROR_OK;
+    }
+
+    return NSAPI_ERROR_UNSUPPORTED;
+}
+
 nsapi_error_t Nanostack::Interface::get_netmask(SocketAddress *address)
 {
     return NSAPI_ERROR_UNSUPPORTED;
@@ -237,6 +258,11 @@ const char *InterfaceNanostack::get_mac_address()
     return NULL;
 }
 
+nsapi_error_t InterfaceNanostack::set_mac_address(uint8_t *mac_addr, size_t addr_len)
+{
+    return _interface->set_mac_address(mac_addr, addr_len);
+}
+
 nsapi_connection_status_t InterfaceNanostack::get_connection_status() const
 {
     if (_interface) {

features/netsocket/NetworkInterface.cpp

@@ -32,6 +32,11 @@ const char *NetworkInterface::get_mac_address()
     return 0;
 }
 
+nsapi_error_t NetworkInterface::set_mac_address(uint8_t *mac_addr, size_t addr_len)
+{
+    return NSAPI_ERROR_UNSUPPORTED;
+}
+
 nsapi_error_t NetworkInterface::get_ip_address(SocketAddress *)
 {
     return NSAPI_ERROR_UNSUPPORTED;

features/netsocket/NetworkInterface.h

@@ -100,6 +100,20 @@ public:
      */
     virtual const char *get_mac_address();
 
+    /** Set the MAC address to the interface.
+     *
+     *  Provided MAC address is set the the network interface. Address must be
+     *  set before using the interface connect() method.
+     *
+     *  @param          mac_addr Buffer containing the MAC address
+     *  @param          addr_len Length of provided buffer in bytes
+     *  @retval         NSAPI_ERROR_OK on success
+     *  @retval         NSAPI_ERROR_UNSUPPORTED if this feature is not supported
+     *  @retval         NSAPI_ERROR_PARAMETER if address is not valid
+     *  @retval         NSAPI_ERROR_BUSY if address can't be set.
+     */
+    virtual nsapi_error_t set_mac_address(uint8_t *mac_addr, size_t addr_len);
+
     /** Get the local IP address
      *
      *  @param          address SocketAddress representation of the local IP address