add missing files not taken with github import

include/nif.h

@@ -0,0 +1,49 @@
+/*
+ * File:        nif.h
+ * Purpose:     Definition of a Network InterFace.
+ *
+ * Notes:
+ */
+
+#ifndef _NIF_H
+#define _NIF_H
+
+/* 
+ * Maximum number of supported protoocls: IP, ARP, RARP 
+ */
+#define MAX_SUP_PROTO   (3)
+
+typedef struct NIF_t
+{
+	ETH_ADDR    hwa;        /* ethernet card hardware address */
+	ETH_ADDR    broadcast;  /* broadcast address */
+	int         mtu;        /* hardware maximum transmission unit */
+	int         ch;         /* ethernet channel associated with this NIF */
+
+	struct SUP_PROTO_t
+	{
+		uint16_t  protocol;
+		void    (*handler)(struct NIF_t *, NBUF *);
+		void    *info;
+	} protocol[MAX_SUP_PROTO];
+
+	unsigned short  num_protocol;
+
+	int     (*send)(struct NIF_t *, uint8_t *, uint8_t *, uint16_t, NBUF *);
+
+	unsigned int    f_rx;
+	unsigned int    f_tx;
+	unsigned int    f_rx_err;
+	unsigned int    f_tx_err;
+	unsigned int    f_err;
+} NIF;
+
+
+extern NIF *nif_init (NIF *);
+extern int nif_protocol_exist (NIF *, uint16_t);
+extern void nif_protocol_handler (NIF *, uint16_t, NBUF *);
+extern void *nif_get_protocol_info (NIF *, uint16_t);
+extern int nif_bind_protocol (NIF *, uint16_t, void (*)(NIF *, NBUF *), void *);
+
+
+#endif /* _NIF_H */