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https://git.rwth-aachen.de/acs/public/villas/node/
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119 lines
2.8 KiB
C++
119 lines
2.8 KiB
C++
/** WebRTC signaling client
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*
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* @file
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* @author Steffen Vogel <svogel2@eonerc.rwth-aachen.de>
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* @author Philipp Jungkamp <Philipp.Jungkamp@opal-rt.com>
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* @copyright 2014-2022, Institute for Automation of Complex Power Systems, EONERC
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* @copyright 2023, OPAL-RT Germany GmbH
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* @license Apache 2.0
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*********************************************************************************/
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#pragma once
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#include <functional>
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#include <chrono>
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#include <libwebsockets.h>
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#include <villas/queue.hpp>
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#include <villas/buffer.hpp>
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#include <villas/web.hpp>
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#include <villas/log.hpp>
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#include <villas/nodes/webrtc/signaling_message.hpp>
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namespace villas {
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namespace node {
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/* Forward declarations */
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class Web;
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namespace webrtc {
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class SignalingClient {
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protected:
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struct sul_offsetof_helper {
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lws_sorted_usec_list_t sul; /**> Schedule connection retry */
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SignalingClient *self;
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} sul_helper;
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uint16_t retry_count; /**> Count of consecutive retries */
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struct lws *wsi;
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struct lws_client_connect_info info;
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/* The retry and backoff policy we want to use for our client connections */
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static constexpr uint32_t backoff_ms[] = { 1<<4, 1<<6, 1<<8, 1<<10, 1<<12, 1<<14, 1<<16 };
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static constexpr lws_retry_bo_t retry = {
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.retry_ms_table = backoff_ms,
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.retry_ms_table_count = LWS_ARRAY_SIZE(backoff_ms),
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.conceal_count = LWS_ARRAY_SIZE(backoff_ms) + 1,
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.secs_since_valid_ping = 3, /* force PINGs after secs idle */
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.secs_since_valid_hangup = 10, /* hangup after secs idle */
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.jitter_percent = 20,
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};
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std::function<void(SignalingMessage)> cbMessage;
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std::function<void()> cbConnected;
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std::function<void()> cbDisconnected;
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std::function<void(std::string)> cbError;
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Queue<SignalingMessage> outgoingMessages;
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Web *web;
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char *uri;
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char *path;
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std::atomic<bool> running;
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Buffer buffer; // A buffer for received fragments before JSON decoding.
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Logger logger;
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int protocolCallback(struct lws *wsi, enum lws_callback_reasons reason, void *in, size_t len);
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static
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void connectStatic(struct lws_sorted_usec_list *sul);
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int writable();
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public:
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SignalingClient(const std::string &server, const std::string &session, const std::string &peer, Web *w);
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~SignalingClient();
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static
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int protocolCallbackStatic(struct lws *wsi, enum lws_callback_reasons reason, void *user, void *in, size_t len);
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void connect();
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void disconnect();
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void sendMessage(SignalingMessage);
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void onMessage(std::function<void(SignalingMessage)> callback)
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{
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cbMessage = callback;
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}
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void onConnected(std::function<void()> callback)
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{
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cbConnected = callback;
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}
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void onDisconnected(std::function<void()> callback)
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{
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cbDisconnected = callback;
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}
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void onError(std::function<void(std::string)> callback)
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{
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cbError = callback;
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}
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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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