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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_WEBRTC_OVERRIDES_P2P_BASE_ICE_CONNECTION_H_
#define THIRD_PARTY_WEBRTC_OVERRIDES_P2P_BASE_ICE_CONNECTION_H_
#include <cstdint>
#include <ostream>
#include <string>
#include <vector>
#include "third_party/webrtc/api/array_view.h"
#include "third_party/webrtc/api/candidate.h"
#include "third_party/webrtc/p2p/base/connection.h"
#include "third_party/webrtc/rtc_base/system/rtc_export.h"
namespace blink {
// Represents an ICE connection comprising of a local candidate, a remote
// candidate, and some state information about the connection.
class RTC_EXPORT IceConnection {
public:
struct RttSample {
int64_t timestamp;
int value;
};
enum class WriteState {
STATE_WRITABLE = 0, // we have received ping responses recently
STATE_WRITE_UNRELIABLE = 1, // we have had a few ping failures
STATE_WRITE_INIT = 2, // we have yet to receive a ping response
STATE_WRITE_TIMEOUT = 3, // we have had a large number of ping failures
};
explicit IceConnection(const webrtc::Connection* connection);
IceConnection(const IceConnection&) = default;
~IceConnection() = default;
// The connection ID.
uint32_t id() const { return id_; }
// The local candidate for this connection.
const webrtc::Candidate& local_candidate() const { return local_candidate_; }
// The remote candidate for this connection.
const webrtc::Candidate& remote_candidate() const {
return remote_candidate_;
}
// Whether the connection is in a connected state.
bool connected() const { return connected_; }
// Whether the connection is currently active for the transport.
bool selected() const { return selected_; }
// Write state of the connection.
WriteState write_state() const { return write_state_; }
// Last time we sent a ping to the other side.
int64_t last_ping_sent() const { return last_ping_sent_; }
// Last time we received a ping from the other side.
int64_t last_ping_received() const { return last_ping_received_; }
// Last time we received date from the other side.
int64_t last_data_received() const { return last_data_received_; }
// Last time we received a response to a ping from the other side.
int64_t last_ping_response_received() const {
return last_ping_response_received_;
}
// The number of pings sent.
int num_pings_sent() const { return num_pings_sent_; }
// Samples of round trip times.
const webrtc::ArrayView<const RttSample> rtt_samples() const {
return rtt_samples_;
}
std::string ToString() const;
// Pretty printing for unit test matchers.
friend void PrintTo(const IceConnection& conn, std::ostream* os) {
*os << conn.ToString();
}
private:
uint32_t id_;
webrtc::Candidate local_candidate_;
webrtc::Candidate remote_candidate_;
// Connection state information.
bool connected_;
bool selected_;
WriteState write_state_;
int64_t last_ping_sent_;
int64_t last_ping_received_;
int64_t last_data_received_;
int64_t last_ping_response_received_;
int num_pings_sent_;
std::vector<RttSample> rtt_samples_;
};
} // namespace blink
#endif // THIRD_PARTY_WEBRTC_OVERRIDES_P2P_BASE_ICE_CONNECTION_H_
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