#ifndef ETHERLIB_TEST_ARP_CACHE_H
#define ETHERLIB_TEST_ARP_CACHE_H

#include "prefab/packet_parsers/ethernet_frame.h"
#include "prefab/packet_parsers/ipv4_types.h"
#include "connection_block.h"

#define ETH_ARP_PACKET_CLASS (0x0806)

struct EthInterface_;


/**
 * ARP cache entry record.
 */
typedef struct {
    EthernetAddress eth; ///< Ethernet address
    ip4_addr ip; ///< IPv4 address
} ArpEntry;

/**
 * ARP cache class.
 */
typedef struct {
    uint16_t size; ///< Number of cache entries
    uint16_t fill; ///< Fill level
    ConnBlock cb; ///< Connection block for sending and receiving ARP requests
    ArpEntry entries[]; ///< Cache entries
} ArpCache;

/**
 * Create new ARP cache table.
 * @param intf Related Ethernet interface
 * @param size Number of available entries
 * @return Pointer to newly allocated ARP cache
 */
ArpCache * arpc_new(struct EthInterface_ * intf, uint16_t size);

/**
 * Learn new assignment.
 * @param arpc Pointer to ARP cache
 * @param newEntry Pointer to map newEntry
 */
void arpc_learn(ArpCache * arpc, const ArpEntry * newEntry);

/**
 * Get entry by IP-address.
 * @param ip IP address
 * @return Pointer to matching entry OR NULL if not found
 */
const ArpEntry *arpc_get(ArpCache *arpc, ip4_addr ip);

/**
 * Free ARP cache.
 * @param aprc Pointer to existing ARP cache.
 */
void arpc_free(ArpCache * aprc);

void arpc_ask(ArpCache *arpc, ip4_addr addr);

void arpc_respond(ArpCache *arpc, const EthernetAddress hwAddr, ip4_addr ipAddr);

const ArpEntry *arpc_get_ask(ArpCache *arpc, ip4_addr ip);

/**
 * Dump ARP cache contents.
 * @param arpc
 */
void arpc_dump(ArpCache * arpc);

#endif //ETHERLIB_TEST_ARP_CACHE_H