// -------------------------------------------------------------------------
// ethernet.c
//
//  21.12.2003, J. Ahrensfeld
//
// -------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <time.h>
#include <sys/time.h>
#include <sys/types.h>
#include "libsys.h"
#include "ethernet.h"
#include "arp.h"

#define	ARP_DGRAM_SIZE		46

// -------------------------------------------------------------------------
void ArpRequest(packet_t *pPacket, uint8_t *eth_addr_src, uint8_t *inet_addr_src, uint8_t *eth_addr_dst, uint8_t *inet_addr_dst)
{
	ARP *pARP;

	pARP = (ARP*)Eth_pkt_buffer_get(pPacket);

	memset(pARP, 0, sizeof(ARP));

	// Make ARP request
	memcpy(pARP->inet_addr_src, inet_addr_src, 4);
	memcpy(pARP->inet_addr_dst, inet_addr_dst, 4);
	memcpy(pARP->eth_addr_src, eth_addr_src, 6);
	memcpy(pARP->eth_addr_dst, eth_addr_dst, 6);

	pARP->hw_type = TYPE_HW_ETH10;
	pARP->proto_type = TYPE_PROTO_IP;
	pARP->opcode = ARP_REQUEST;
	pARP->hw_size = 6;
	pARP->proto_size = 4;

	// Send it
	Eth_pkt_append(pPacket, sizeof(ARP));

}

void ArpReply(packet_t *pPacket, uint8_t *eth_addr_src, uint8_t *inet_addr_src, uint8_t *eth_addr_dst, uint8_t *inet_addr_dst)
{
	ARP *pARP;

	pARP = (ARP*)Eth_pkt_buffer_get(pPacket);

	memset(pARP, 0, sizeof(ARP));

	// Make ARP reply
	memcpy(pARP->inet_addr_src, inet_addr_src, 4);
	memcpy(pARP->inet_addr_dst, inet_addr_dst, 4);
	memcpy(pARP->eth_addr_src, eth_addr_src, 6);
	memcpy(pARP->eth_addr_dst, eth_addr_dst, 6);

	pARP->hw_type = TYPE_HW_ETH10;
	pARP->proto_type = TYPE_PROTO_IP;
	pARP->opcode = ARP_REPLY;
	pARP->hw_size = 6;
	pARP->proto_size = 4;

	// Send it
	Eth_pkt_append(pPacket, sizeof(ARP));

}