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https://git.rwth-aachen.de/acs/public/villas/node/
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127 lines
3.7 KiB
C++
127 lines
3.7 KiB
C++
/* WebRTC peer connection.
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*
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* Author: Steffen Vogel <post@steffenvogel.de>
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* Author: Philipp Jungkamp <Philipp.Jungkamp@opal-rt.com>
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* SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
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* SPDX-FileCopyrightText: 2023 OPAL-RT Germany GmbH
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#include <fmt/ostream.h>
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#include <jansson.h>
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#include <rtc/peerconnection.hpp>
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#include <rtc/rtc.hpp>
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#include <villas/config.hpp>
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#include <villas/log.hpp>
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#include <villas/node/config.hpp>
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#include <villas/nodes/webrtc/signaling_client.hpp>
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#include <villas/signal_list.hpp>
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#include <villas/web.hpp>
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/*
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* libdatachannel defines the operator<< overloads required to format
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* rtc::PeerConnection::State and similar in the global namespace.
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* But C++ ADL based overload set construction does not find these operators,
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* if these are invoked in the spdlog/fmt libraries.
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*
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* See this issue for a short explanation of ADL errors:
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* https://github.com/gabime/spdlog/issues/1227#issuecomment-532009129
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*
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* Adding the global ::operator<< overload set to the namespace rtc where
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* the data structures are defined, allows ADL to pick these up in spdlog/fmt.
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*
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* Since libdatachannel 0.20, operator<< has been moved into the rtc namespace.
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*/
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#if RTC_VERSION_NUM < 0x001400
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namespace rtc {
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using ::operator<<;
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}
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#endif
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#ifndef FMT_LEGACY_OSTREAM_FORMATTER
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template <>
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class fmt::formatter<rtc::PeerConnection::State>
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: public fmt::ostream_formatter {};
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#endif
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namespace villas {
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namespace node {
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namespace webrtc {
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class PeerConnection {
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public:
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PeerConnection(const std::string &server, const std::string &session,
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const std::string &peer,
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std::shared_ptr<SignalList> out_signals,
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rtc::Configuration config, Web *w, rtc::DataChannelInit d);
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~PeerConnection();
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bool waitForDataChannel(std::chrono::seconds timeout);
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void onMessage(std::function<void(rtc::binary)> callback);
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void sendMessage(rtc::binary msg);
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json_t *readStatus() const;
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void connect();
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void disconnect();
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protected:
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Web *web;
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std::vector<rtc::IceServer> extraServers;
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rtc::DataChannelInit dataChannelInit;
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rtc::Configuration defaultConfig;
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std::shared_ptr<rtc::PeerConnection> conn;
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std::shared_ptr<rtc::DataChannel> chan;
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std::shared_ptr<SignalingClient> client;
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std::shared_ptr<SignalList> out_signals;
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Logger logger;
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std::mutex mutex;
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std::condition_variable_any startupCondition;
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bool stopStartup;
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bool warnNotConnected;
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bool standby;
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bool first;
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int firstID;
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int secondID;
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std::function<void(rtc::binary)> onMessageCallback;
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void resetConnection(std::unique_lock<decltype(PeerConnection::mutex)> &lock);
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void resetConnectionAndStandby(
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std::unique_lock<decltype(PeerConnection::mutex)> &lock);
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void notifyStartup();
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void setupPeerConnection(std::shared_ptr<rtc::PeerConnection> = nullptr);
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void setupDataChannel(std::shared_ptr<rtc::DataChannel> = nullptr);
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void onLocalDescription(rtc::Description sdp);
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void onLocalCandidate(rtc::Candidate cand);
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void onConnectionStateChange(rtc::PeerConnection::State state);
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void onSignalingStateChange(rtc::PeerConnection::SignalingState state);
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void onGatheringStateChange(rtc::PeerConnection::GatheringState state);
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void onSignalingConnected();
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void onSignalingDisconnected();
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void onSignalingError(std::string err);
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void onSignalingMessage(SignalingMessage msg);
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void onDataChannel(std::shared_ptr<rtc::DataChannel> dc);
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void onDataChannelOpen();
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void onDataChannelClosed();
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void onDataChannelError(std::string err);
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void onDataChannelMessage(rtc::string msg);
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void onDataChannelMessage(rtc::binary msg);
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};
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} // namespace webrtc
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} // namespace node
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} // namespace villas
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