//
// Created by epagris on 2022.12.08..
//

#ifndef ETHERLIB_TEST_ARP_PACKET_H
#define ETHERLIB_TEST_ARP_PACKET_H

#include <stdint.h>
#include "ipv4_types.h"

#include "../../packet_registry.h"
#include "../../packet_sieve.h"

#define ETH_ARP_PACKET_CLASS (0x0806)
#define ETH_ARP_HEADER_SIZE (28)

/**
 * Arp operations
 */
typedef enum {
    ARPOP_REQ = 1, ///< ARP Request
    ARPOP_REP = 2 ///< ARP Reply
} ArpOp;

typedef enum {
    ARP_HWTYPE_ETHERNET = 1
} ArpHwType;

/**
 * ARP properties.
 */
typedef struct {
    PcktPropsHeader

    uint16_t HTYPE; ///< Hardware type (Ethernet: 1)
    uint16_t PTYPE; ///< Protocol type (IP: 0x0800)
    uint8_t HLEN; ///< Hardware address length
    uint8_t PLEN; ///< Protocol address length
    uint16_t OPER; ///< Operation
    uint8_t SHA[6]; ///< Array of addresses (SHA, SPA, THA, TPA)
    ip4_addr SPA;
    uint8_t THA[6];
    ip4_addr TPA;
} ArpProps;

int parse_arp(const uint8_t *hdr, uint32_t size, PcktHeaderElement *pcktHdrLe, struct EthInterface_ *intf);

void insert_arp_header(uint8_t *hdr, const PcktHeaderElement *headers);

#endif //ETHERLIB_TEST_ARP_PACKET_H