refactored the custom config settings.

bacnet-stack/ethernet.h

@@ -37,6 +37,10 @@
 #include <stdint.h>
 #include "bacdef.h"
 
+// specific defines for Ethernet
+#define MAX_HEADER (6+6+2+1+1+1)
+#define MAX_MPDU (MAX_HEADER+MAX_PDU)
+
 bool ethernet_valid(void);
 bool ethernet_cleanup(void);
 bool ethernet_init(char *interface_name);