add directory study

study/linux-travel/MINIX-1.5/1.5/Source/amoeba/kernel/etherformat.h

@@ -0,0 +1,24 @@
+/* Format of packets on the Ethernet */
+
+#define AMOEBAPROTO 0x8145		/* Official Ethernet protocol number */
+#define ALTAMOEBAPROTO 2222		/* Old Amoeba protocol number */
+#define ETHERBITS	0x80		/* These addresses on Ethernet */
+
+typedef struct
+{
+    char e[6];
+} Eth_addr;
+
+typedef struct
+{
+	Eth_addr	 f_dstaddr;
+	Eth_addr	 f_srcaddr;
+	unshort		 f_proto;
+	struct pktheader f_ah;
+} Framehdr;
+	
+typedef struct
+{
+	Framehdr	ep_fr;
+	char		ep_data[1490];
+} Etherpacket;