124 lines
3.3 KiB
C++
124 lines
3.3 KiB
C++
/* Copyright 2016, Ableton AG, Berlin. All rights reserved.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* If you would like to incorporate Link into a proprietary software application,
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* please contact <link-devs@ableton.com>.
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*/
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#pragma once
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#include <ableton/platforms/asio/AsioWrapper.hpp>
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#include <ableton/util/Injected.hpp>
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namespace ableton
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{
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namespace discovery
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{
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inline asio::ip::udp::endpoint multicastEndpoint()
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{
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return {asio::ip::address_v4::from_string("224.76.78.75"), 20808};
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}
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// Type tags for dispatching between unicast and multicast packets
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struct MulticastTag
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{
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};
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struct UnicastTag
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{
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};
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template <typename IoContext, std::size_t MaxPacketSize>
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class IpV4Interface
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{
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public:
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using Socket = typename util::Injected<IoContext>::type::template Socket<MaxPacketSize>;
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IpV4Interface(util::Injected<IoContext> io, const asio::ip::address_v4& addr)
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: mIo(std::move(io))
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, mMulticastReceiveSocket(mIo->template openMulticastSocket<MaxPacketSize>(addr))
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, mSendSocket(mIo->template openUnicastSocket<MaxPacketSize>(addr))
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{
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}
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IpV4Interface(const IpV4Interface&) = delete;
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IpV4Interface& operator=(const IpV4Interface&) = delete;
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IpV4Interface(IpV4Interface&& rhs)
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: mIo(std::move(rhs.mIo))
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, mMulticastReceiveSocket(std::move(rhs.mMulticastReceiveSocket))
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, mSendSocket(std::move(rhs.mSendSocket))
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{
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}
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std::size_t send(
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const uint8_t* const pData, const size_t numBytes, const asio::ip::udp::endpoint& to)
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{
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return mSendSocket.send(pData, numBytes, to);
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}
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template <typename Handler>
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void receive(Handler handler, UnicastTag)
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{
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mSendSocket.receive(SocketReceiver<UnicastTag, Handler>{std::move(handler)});
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}
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template <typename Handler>
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void receive(Handler handler, MulticastTag)
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{
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mMulticastReceiveSocket.receive(
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SocketReceiver<MulticastTag, Handler>(std::move(handler)));
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}
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asio::ip::udp::endpoint endpoint() const
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{
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return mSendSocket.endpoint();
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}
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private:
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template <typename Tag, typename Handler>
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struct SocketReceiver
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{
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SocketReceiver(Handler handler)
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: mHandler(std::move(handler))
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{
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}
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template <typename It>
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void operator()(
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const asio::ip::udp::endpoint& from, const It messageBegin, const It messageEnd)
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{
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mHandler(Tag{}, from, messageBegin, messageEnd);
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}
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Handler mHandler;
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};
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util::Injected<IoContext> mIo;
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Socket mMulticastReceiveSocket;
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Socket mSendSocket;
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};
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template <std::size_t MaxPacketSize, typename IoContext>
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IpV4Interface<IoContext, MaxPacketSize> makeIpV4Interface(
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util::Injected<IoContext> io, const asio::ip::address_v4& addr)
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{
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return {std::move(io), addr};
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}
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} // namespace discovery
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} // namespace ableton
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