#include "IpAddressTranslator.h"
#include <tins/ip_address.h>
#include <tins/ipv6_address.h>

#ifndef NdpPrefixValueString
#define NdpPrefixValueString "FF02:0:0:0:0:1:FF00:0"
#endif

#ifndef NdpMaskValueString
#define NdpMaskValueString "::FF:FFFF"
#endif

const size_t IpAddressTranslator::lastAddressByteIndex = Tins::IPv4Address::address_size - 1;
const UPtrIPv6Address IpAddressTranslator::ndpPrefix = std::make_unique<Tins::IPv6Address>(NdpPrefixValueString);
const UPtrIPv6Address IpAddressTranslator::ndpMask = std::make_unique<Tins::IPv6Address>(NdpMaskValueString);

void IpAddressTranslator::toSolicitedNodeAddress(const Tins::IPv4Address &ipv4Address, Tins::IPv6Address &resultIpv6Address)
{
	toIpv6Address(ipv4Address, resultIpv6Address);
	toSolicitedNodeAddress(resultIpv6Address, resultIpv6Address);
}

void IpAddressTranslator::toSolicitedNodeAddress(const Tins::IPv6Address &ipv6Address, Tins::IPv6Address &resultIpv6Address)
{
	resultIpv6Address = (*ndpMask & ipv6Address)| *ndpPrefix;
}

uint32_t IpAddressTranslator::toIpv4AddressBytes(IN const Tins::IPv6Address & ipv6Address)
{
	uint32_t ipBytesNetworkOrder = 0;
	uint8_t * ptrIpByte = reinterpret_cast<uint8_t *>( &ipBytesNetworkOrder );
	Tins::IPv6Address::const_iterator it = ipv6Address.end();
	for (int i = lastAddressByteIndex; i > -1; i--)
	{
		it--;
		ptrIpByte[i] = *it;
	}

	return ipBytesNetworkOrder;
}
void IpAddressTranslator::toIpv6Address(IN const Tins::IPv4Address & ipv4Address, INOUT Tins::IPv6Address & resultIpv6Address)
{
	Tins::IPv6Address::iterator it = resultIpv6Address.end();
	uint32_t ipBytesNetworkOrder = ipv4Address;
	uint8_t * ptrIpByte = reinterpret_cast<uint8_t *>( &ipBytesNetworkOrder );
	for (int i = lastAddressByteIndex; i > -1; i--)
	{
		it--;
		*it = ptrIpByte[i];
	}
}