add missing files not taken with github import

include/arp.h

@@ -0,0 +1,99 @@
+/*
+ * File:        arp.h
+ * Purpose:     ARP definitions.
+ *
+ * Notes:
+ */
+
+#ifndef _ARP_H
+#define _ARP_H
+
+/********************************************************************/
+
+/*
+ * This data definition is defined for Ethernet only!
+ */
+typedef struct
+{
+    uint16_t      ar_hrd;
+    uint16_t      ar_pro;
+    uint8_t       ar_hln;
+    uint8_t       ar_pln;
+    uint16_t      opcode;
+    uint8_t       ar_sha[6];  /* ethernet hw address */
+    uint8_t       ar_spa[4];  /* ip address */
+    uint8_t       ar_tha[6];  /* ethernet hw address */
+    uint8_t       ar_tpa[4];  /* ip address */
+} arp_frame_hdr;
+
+#define ARP_HDR_LEN     sizeof(arp_frame_hdr)
+
+/*
+ * ARP table entry definition.  Note that this table only designed
+ * with Ethernet and IP in mind.
+ */
+#define MAX_HWA_SIZE    (6) /* 6 is enough for Ethernet address */
+#define MAX_PA_SIZE     (4) /* 4 is enough for Protocol address */
+typedef struct
+{
+    uint16_t  protocol;
+    uint8_t   hwa_size;
+    uint8_t   hwa[MAX_HWA_SIZE];
+    uint8_t   pa_size;
+    uint8_t   pa[MAX_PA_SIZE];
+    int     longevity;
+} ARPENTRY;
+#define MAX_ARP_ENTRY   (10)
+
+typedef struct
+{
+    unsigned int    tab_size;
+    ARPENTRY        table[MAX_ARP_ENTRY];
+} ARP_INFO;
+
+#define ARP_ENTRY_EMPTY (0)
+#define ARP_ENTRY_PERM  (1)
+#define ARP_ENTRY_TEMP  (2)
+
+
+#define ETHERNET        (1)
+#define ARP_REQUEST     (1)
+#define ARP_REPLY       (2)
+
+#define ARP_TIMEOUT     (1)     /* Timeout in seconds */
+
+/* Protocol Header information */
+#define ARP_HDR_OFFSET  ETH_HDR_LEN
+
+/********************************************************************/
+
+uint8_t *
+arp_get_mypa (void);
+
+uint8_t *
+arp_get_myha (void);
+
+uint8_t *
+arp_get_broadcast (void);
+
+void
+arp_merge (ARP_INFO *, uint16_t, int, uint8_t *, int, uint8_t *, int);
+
+void
+arp_remove (ARP_INFO *, uint16_t, uint8_t *, uint8_t *);
+
+void
+arp_request (NIF *, uint8_t *);
+
+void
+arp_handler (NIF *, NBUF *);
+
+uint8_t *
+arp_resolve (NIF *, uint16_t, uint8_t *);
+
+void
+arp_init (ARP_INFO *);
+
+/********************************************************************/
+
+#endif  /* _ARP_H */