Initial Implementation of TFTP protocol and new protocol structs.

include/grub/net/udp.h

@@ -0,0 +1,22 @@
+#ifndef GRUB_NET_UDP_HEADER
+#define GRUB_NET_UDP_HEADER	1
+#include <grub/misc.h>
+/*
+typedef enum
+  {
+    GRUB_PROT_TFTP
+  } protocol_type;
+*/
+
+#define GRUB_PROT_TFTP 1 
+
+struct udphdr {
+  grub_uint16_t src;
+  grub_uint16_t dst;
+  grub_uint16_t len;
+  grub_uint16_t chksum;
+} __attribute__ ((packed));
+
+void udp_ini(void);
+void udp_fini(void);
+#endif