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include/eth.h

@@ -0,0 +1,57 @@
+/*
+ * File:        eth.h
+ * Purpose:     Definitions for Ethernet Frames.
+ *
+ * Modifications:
+ */
+
+#ifndef _ETH_H
+#define _ETH_H
+
+#include "bas_types.h"
+
+/*******************************************************************/
+
+/* Ethernet standard lengths in bytes*/
+#define ETH_ADDR_LEN    (6)
+#define ETH_TYPE_LEN    (2)
+#define ETH_CRC_LEN     (4)
+#define ETH_MAX_DATA    (1500)
+#define ETH_MIN_DATA    (46)
+#define ETH_HDR_LEN     (ETH_ADDR_LEN * 2 + ETH_TYPE_LEN)
+
+/* Defined Ethernet Frame Types */
+#define ETH_FRM_IP      (0x0800)
+#define ETH_FRM_ARP     (0x0806)
+#define ETH_FRM_RARP    (0x8035)
+#define ETH_FRM_TEST    (0xA5A5)
+
+/* Maximum and Minimum Ethernet Frame Sizes */
+#define ETH_MAX_FRM     (ETH_HDR_LEN + ETH_MAX_DATA + ETH_CRC_LEN)
+#define ETH_MIN_FRM     (ETH_HDR_LEN + ETH_MIN_DATA + ETH_CRC_LEN)
+#define ETH_MTU         (ETH_HDR_LEN + ETH_MAX_DATA)
+
+/* Ethernet Addresses */
+typedef uint8_t ETH_ADDR[ETH_ADDR_LEN];
+
+/* 16-bit Ethernet Frame Type, ie. Protocol */
+typedef uint16_t ETH_FRM_TYPE;
+
+/* Ethernet Frame Header definition */
+typedef struct
+{
+	ETH_ADDR     dest;
+	ETH_ADDR     src;
+	ETH_FRM_TYPE type;
+} ETH_HDR;
+
+/* Ethernet Frame definition */
+typedef struct
+{
+	ETH_HDR head;
+	uint8_t*  data;
+} ETH_FRAME;
+
+/*******************************************************************/
+
+#endif  /* _ETH_H */