Fix a bunch of net issues

include/grub/net/arp.h

@@ -3,13 +3,11 @@
 #include <grub/misc.h>
 #include <grub/net.h>
 
-/* IANA ARP constant to define hardware type as ethernet */
-#define ARPHRD_ETHERNET 1
-/* IANA Ethertype */
-#define ARP_ETHERTYPE 0x806
-
-/* Size for cache table */
-#define SIZE_ARP_TABLE 5
+enum
+{
+/* IANA ARP constant to define hardware type as ethernet. */
+  GRUB_NET_ARPHRD_ETHERNET = 1
+};
 
 /* ARP header operation codes */
 #define ARP_REQUEST 1

include/grub/net/ethernet.h

@@ -38,6 +38,14 @@ struct snaphdr
   grub_uint16_t type;
 } __attribute__ ((packed));
 
+/* IANA Ethertype */
+enum
+{
+  GRUB_NET_ETHERTYPE_IP = 0x0800,
+  GRUB_NET_ETHERTYPE_ARP = 0x0806
+};
+
+
 grub_err_t 
 send_ethernet_packet (struct grub_net_network_level_interface *inf,
 		      struct grub_net_buff *nb,

include/grub/net/ip.h

@@ -2,8 +2,6 @@
 #define GRUB_NET_IP_HEADER	1
 #include <grub/misc.h>
 
-#define IP_ETHERTYPE 0x800 /* IANA Ethertype */
-
 struct iphdr {
   grub_uint8_t verhdrlen;
   grub_uint8_t service;