SivIPv4.cpp

//-----------------------------------------------
//
//	This file is part of the Siv3D Engine.
//
//	Copyright (c) 2008-2019 Ryo Suzuki
//	Copyright (c) 2016-2019 OpenSiv3D Project
//
//	Licensed under the MIT License.
//
//-----------------------------------------------


//参考
//https://github.com/Siv3D/OpenSiv3D/blob/master/Siv3D/src/Siv3D/TCPClient/TCPClientDetail.hpp
//https://boostjp.github.io/tips/network/tcp.html#resolve
//https://www.boost.org/doc/libs/1_72_0/doc/html/boost_asio/reference/ip__basic_resolver_query/basic_resolver_query/overload4.html
//https://www.boost.org/doc/libs/1_72_0/doc/html/boost_asio/reference/ip__basic_endpoint/address/overload1.html
//https://www.boost.org/doc/libs/1_59_0/doc/html/boost_asio/reference/ip__address_v4/to_string.html
//https://subscription.packtpub.com/book/application_development/9781783986545/1/ch01lvl1sec13/resolving-a-dns-name
//https://stackoverflow.com/questions/51427957/boost-protocol-type-namespace

# include <Siv3D/IPv4.hpp>
# include <Siv3D/EngineLog.hpp>
# include <Siv3D/Format.hpp>
# define  ASIO_STANDALONE
# include <asio/asio.hpp>

namespace s3d
{
	IPv4::IPv4(const String& ipv4)
	{
		asio::io_service io_service;
		asio::ip::tcp::resolver resolver(io_service);
		asio::ip::tcp::resolver::query query(asio::ip::tcp::v4(),Unicode::NarrowAscii(ipv4),"80");
		asio::error_code ec;
		auto it=resolver.resolve(query,ec);
		if(ec.value()!=0){
			// Failed to resolve the DNS name. Breaking execution.
			LOG_ERROR(U"Failed to resolve a DNS name.");
			LOG_ERROR(U"Error Code: {}"_fmt(ec.value()));
			LOG_ERROR(U"Message: {}"_fmt(Unicode::Widen(ec.message())));
		}
		if(!it.empty())std::istringstream(it->endpoint().address().to_v4().to_string())>>*this;
	}

	String IPv4::toStr() const
	{
		return Format(asUint8[0], U'.', asUint8[1], U'.', asUint8[2], U'.', asUint8[3]);
	}

	void Formatter(FormatData& formatData, const IPv4& value)
	{
		formatData.string.append(value.toStr());
	}
}