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VILLASnode/include/villas/nodes/webrtc/signaling_client.hpp
Steffen Vogel 02a2aa4f94 Apply clang-format changes
Signed-off-by: Steffen Vogel <steffen.vogel@opal-rt.com>
2023-09-08 11:37:42 +02:00

114 lines
2.9 KiB
C++

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