/usr/include/ableton/discovery/IpV4Interface.hpp is in ableton-link-dev 1.0.0+dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* If you would like to incorporate Link into a proprietary software application,
* please contact <link-devs@ableton.com>.
*/
#pragma once
#include <ableton/platforms/asio/AsioService.hpp>
#include <ableton/util/Injected.hpp>
namespace ableton
{
namespace discovery
{
inline asio::ip::udp::endpoint multicastEndpoint()
{
return {asio::ip::address::from_string("224.76.78.75"), 20808};
}
// Type tags for dispatching between unicast and multicast packets
struct MulticastTag
{
};
struct UnicastTag
{
};
template <typename IoContext, std::size_t MaxPacketSize>
class IpV4Interface
{
public:
using Socket = typename util::Injected<IoContext>::type::template Socket<MaxPacketSize>;
IpV4Interface(util::Injected<IoContext> io, const asio::ip::address_v4& addr)
: mIo(std::move(io))
, mMulticastReceiveSocket(mIo->template openMulticastSocket<MaxPacketSize>(addr))
, mSendSocket(mIo->template openUnicastSocket<MaxPacketSize>(addr))
{
}
IpV4Interface(const IpV4Interface&) = delete;
IpV4Interface& operator=(const IpV4Interface&) = delete;
IpV4Interface(IpV4Interface&& rhs)
: mIo(std::move(rhs.mIo))
, mMulticastReceiveSocket(std::move(rhs.mMulticastReceiveSocket))
, mSendSocket(std::move(rhs.mSendSocket))
{
}
std::size_t send(
const uint8_t* const pData, const size_t numBytes, const asio::ip::udp::endpoint& to)
{
return mSendSocket.send(pData, numBytes, to);
}
template <typename Handler>
void receive(Handler handler, UnicastTag)
{
mSendSocket.receive(SocketReceiver<UnicastTag, Handler>{std::move(handler)});
}
template <typename Handler>
void receive(Handler handler, MulticastTag)
{
mMulticastReceiveSocket.receive(
SocketReceiver<MulticastTag, Handler>(std::move(handler)));
}
asio::ip::udp::endpoint endpoint() const
{
return mSendSocket.endpoint();
}
private:
template <typename Tag, typename Handler>
struct SocketReceiver
{
SocketReceiver(Handler handler)
: mHandler(std::move(handler))
{
}
template <typename It>
void operator()(
const asio::ip::udp::endpoint& from, const It messageBegin, const It messageEnd)
{
mHandler(Tag{}, from, messageBegin, messageEnd);
}
Handler mHandler;
};
util::Injected<IoContext> mIo;
Socket mMulticastReceiveSocket;
Socket mSendSocket;
};
template <std::size_t MaxPacketSize, typename IoContext>
IpV4Interface<IoContext, MaxPacketSize> makeIpV4Interface(
util::Injected<IoContext> io, const asio::ip::address_v4& addr)
{
return {std::move(io), addr};
}
} // namespace discovery
} // namespace ableton
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