Added in flag to allow optional coercion of provided MAC address to set device as Locally Administrated and Unicast

Author: kegilbert

platform/mbed_interface.c

@@ -84,9 +84,13 @@ WEAK int mbed_uid(char *uid) {
 static uint8_t manual_mac_address_set = 0;
 static char manual_mac_address[6];
 
-void mbed_set_mac_address(const char *mac) {
+void mbed_set_mac_address(const char *mac, uint8_t coerce_mac_control_bits) {
     memcpy(manual_mac_address, mac, 6);
     manual_mac_address_set = 1;
+    if(coerce_mac_control_bits) {
+        manual_mac_address[0] |= 0x02; // force bit 1 to a "1" = "Locally Administered"
+        manual_mac_address[0] &= 0xFE; // force bit 0 to a "0" = Unicast
+    }
 }
 
 WEAK void mbed_mac_address(char *mac) {

platform/mbed_interface.h

@@ -104,8 +104,11 @@ int mbed_interface_uid(char *uid);
  *  mbed_mac_address() will readback this configured value
  *
  *  @param mac A 6-byte array containing the desired MAC address to be set
+ *  @param coerce_mac_control_bits An 8-bit int that is used as a boolean flag to either coerce
+ *         the provided MAC address to be Locally Administered and Unicast or to use the
+ *         provided MAC address unmodified
  */
-void mbed_set_mac_address(const char *mac);
+void mbed_set_mac_address(const char *mac, uint8_t coerce_mac_control_bits);
 
 /** This returns a unique 6-byte MAC address, based on the interface UID
  * If the interface is not present, it returns a default fixed MAC address (00:02:F7:F0:00:00)