103 lines
2.8 KiB
C++
103 lines
2.8 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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#include <chrono>
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#include <vector>
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namespace ableton
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{
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namespace discovery
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{
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// Callback takes a range of asio::ip:address which is
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// guaranteed to be sorted and unique
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template <typename Callback, typename IoContext>
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class InterfaceScanner
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{
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public:
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using Timer = typename util::Injected<IoContext>::type::Timer;
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InterfaceScanner(const std::chrono::seconds period,
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util::Injected<Callback> callback,
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util::Injected<IoContext> io)
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: mPeriod(period)
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, mCallback(std::move(callback))
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, mIo(std::move(io))
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, mTimer(mIo->makeTimer())
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{
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}
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void enable(const bool bEnable)
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{
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if (bEnable)
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{
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scan();
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}
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else
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{
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mTimer.cancel();
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}
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}
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void scan()
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{
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using namespace std;
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debug(mIo->log()) << "Scanning network interfaces";
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// Rescan the hardware for available network interface addresses
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vector<asio::ip::address> addrs = mIo->scanNetworkInterfaces();
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// Sort and unique them to guarantee consistent comparison
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sort(begin(addrs), end(addrs));
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addrs.erase(unique(begin(addrs), end(addrs)), end(addrs));
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// Pass them to the callback
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(*mCallback)(std::move(addrs));
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// setup the next scanning
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mTimer.expires_from_now(mPeriod);
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using ErrorCode = typename Timer::ErrorCode;
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mTimer.async_wait([this](const ErrorCode e) {
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if (!e)
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{
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scan();
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}
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});
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}
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private:
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const std::chrono::seconds mPeriod;
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util::Injected<Callback> mCallback;
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util::Injected<IoContext> mIo;
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Timer mTimer;
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};
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// Factory function
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template <typename Callback, typename IoContext>
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InterfaceScanner<Callback, IoContext> makeInterfaceScanner(
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const std::chrono::seconds period,
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util::Injected<Callback> callback,
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util::Injected<IoContext> io)
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{
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return {period, std::move(callback), std::move(io)};
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}
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} // namespace discovery
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} // namespace ableton
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