Add rtems_bsd_get_ethernet_addr()

rtemsbsd/include/rtems/bsd/util.h

@@ -32,10 +32,31 @@
 #ifndef _RTEMS_BSD_UTIL_H_
 #define _RTEMS_BSD_UTIL_H_
 
+#include <sys/types.h>
+
+#include <net/ethernet.h>
+
+#include <stdint.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 
+/**
+ * @brief Gets the Ethernet address of an interface identified by its name.
+ *
+ * This function uses getifaddrs().  The interface type is not checked, so it
+ * is only safe to use this function for Ethernet type interfaces.
+ *
+ * @param[in] ifname The name of the interface.
+ * @parma[out] eaddr The Ethernet address of this interface.
+ *
+ * @retval 0 Successful operation.
+ * @retval -1 An error occurred.  The errno is set to indicate the error.
+ */
+int
+rtems_bsd_get_ethernet_addr(const char *ifname, uint8_t eaddr[ETHER_ADDR_LEN]);
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */