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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/third_party/quiche/src/quic/core/congestion_control/send_algorithm_interface.h"
#include "absl/base/attributes.h"
#include "net/third_party/quiche/src/quic/core/congestion_control/bbr2_sender.h"
#include "net/third_party/quiche/src/quic/core/congestion_control/bbr_sender.h"
#include "net/third_party/quiche/src/quic/core/congestion_control/tcp_cubic_sender_bytes.h"
#include "net/third_party/quiche/src/quic/core/quic_packets.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_bug_tracker.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_flag_utils.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_flags.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_pcc_sender.h"
namespace quic {
class RttStats;
// Factory for send side congestion control algorithm.
SendAlgorithmInterface* SendAlgorithmInterface::Create(
const QuicClock* clock,
const RttStats* rtt_stats,
const QuicUnackedPacketMap* unacked_packets,
CongestionControlType congestion_control_type,
QuicRandom* random,
QuicConnectionStats* stats,
QuicPacketCount initial_congestion_window,
SendAlgorithmInterface* old_send_algorithm) {
QuicPacketCount max_congestion_window =
GetQuicFlag(FLAGS_quic_max_congestion_window);
switch (congestion_control_type) {
case kGoogCC: // GoogCC is not supported by quic/core, fall back to BBR.
case kBBR:
return new BbrSender(clock->ApproximateNow(), rtt_stats, unacked_packets,
initial_congestion_window, max_congestion_window,
random, stats);
case kBBRv2:
return new Bbr2Sender(
clock->ApproximateNow(), rtt_stats, unacked_packets,
initial_congestion_window, max_congestion_window, random, stats,
old_send_algorithm &&
old_send_algorithm->GetCongestionControlType() == kBBR
? static_cast<BbrSender*>(old_send_algorithm)
: nullptr);
case kPCC:
// PCC is work has stalled, fall back to CUBIC instead.
ABSL_FALLTHROUGH_INTENDED;
case kCubicBytes:
return new TcpCubicSenderBytes(
clock, rtt_stats, false /* don't use Reno */,
initial_congestion_window, max_congestion_window, stats);
case kRenoBytes:
return new TcpCubicSenderBytes(clock, rtt_stats, true /* use Reno */,
initial_congestion_window,
max_congestion_window, stats);
}
return nullptr;
}
} // namespace quic
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