#ifndef ETHERNET_H
#define ETHERNET_H

#include "stdint.h"
#include "stddef.h"

// length of a string representation of a MAC address
#define NETWORK_ETHERNET_MAC_ADDR_STRING 6 * 3 + 1

// minimal size of an ethernet packet
#define ETHERNET_MIN_FRAME_SIZE_IEEE_802_3 64

// maximal size of an ethernet packet
#define ETHERNET_MAX_FRAME_SIZE_IEEE_802_3 1536

// hardware_address_len
#define NETWORK_HARDWARE_ETHERNET_ADDRESS_LENGTH 6

typedef struct {
	uint8_t byte[NETWORK_HARDWARE_ETHERNET_ADDRESS_LENGTH];
} network_mac_address_t;

typedef uint16_t network_ether_type_t;

// TODO: network order not host oder, so for now swap it
#define NETWORK_ETHER_PROTOCOL_TYPE_ARP (network_ether_type_t)0x0608
#define NETWORK_ETHER_PROTOCOL_TYPE_IPV4 (network_ether_type_t)0x0008

#if defined( __TINYC__ )
#pragma pack(1)
#endif

typedef struct {
	network_mac_address_t dst_addr;
	network_mac_address_t src_addr;
	network_ether_type_t type;
} __attribute__( ( packed ) ) network_ethernet_packet_header_t;

typedef struct {
	network_ethernet_packet_header_t header;
	uint8_t *data;
} __attribute__( ( packed ) ) network_ethernet_packet_t;

#if defined( __TINYC__ )
#pragma pack()
#endif

char *network_mac_address_to_string( network_mac_address_t mac, char *buf, size_t buflen );

#endif // ETHERNET_H