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/*
* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <unordered_map>
#include "common/bind.h"
#include "l2cap/internal/basic_mode_channel_data_controller.h"
#include "l2cap/internal/enhanced_retransmission_mode_channel_data_controller.h"
#include "l2cap/internal/le_credit_based_channel_data_controller.h"
#include "l2cap/internal/scheduler.h"
#include "l2cap/internal/sender.h"
#include "os/handler.h"
#include "os/log.h"
namespace bluetooth {
namespace l2cap {
namespace internal {
Sender::Sender(os::Handler* handler, ILink* link, Scheduler* scheduler, std::shared_ptr<ChannelImpl> channel)
: handler_(handler), link_(link), queue_end_(channel->GetQueueDownEnd()), scheduler_(scheduler),
channel_id_(channel->GetCid()), remote_channel_id_(channel->GetRemoteCid()),
data_controller_(std::make_unique<BasicModeDataController>(channel_id_, remote_channel_id_, queue_end_, handler_,
scheduler_)) {
try_register_dequeue();
}
Sender::Sender(os::Handler* handler, ILink* link, Scheduler* scheduler, std::shared_ptr<ChannelImpl> channel,
ChannelMode mode)
: handler_(handler), link_(link), queue_end_(channel->GetQueueDownEnd()), scheduler_(scheduler),
channel_id_(channel->GetCid()), remote_channel_id_(channel->GetRemoteCid()) {
if (mode == ChannelMode::BASIC) {
data_controller_ =
std::make_unique<BasicModeDataController>(channel_id_, remote_channel_id_, queue_end_, handler_, scheduler_);
} else if (mode == ChannelMode::ERTM) {
data_controller_ =
std::make_unique<ErtmController>(link_, channel_id_, remote_channel_id_, queue_end_, handler_, scheduler_);
} else if (mode == ChannelMode::LE_CREDIT_BASED) {
data_controller_ = std::make_unique<LeCreditBasedDataController>(link_, channel_id_, remote_channel_id_, queue_end_,
handler_, scheduler_);
}
try_register_dequeue();
}
Sender::~Sender() {
if (is_dequeue_registered_) {
queue_end_->UnregisterDequeue();
}
}
void Sender::OnPacketSent() {
try_register_dequeue();
}
std::unique_ptr<Sender::UpperDequeue> Sender::GetNextPacket() {
return data_controller_->GetNextPacket();
}
DataController* Sender::GetDataController() {
return data_controller_.get();
}
void Sender::try_register_dequeue() {
if (is_dequeue_registered_) {
return;
}
queue_end_->RegisterDequeue(handler_, common::Bind(&Sender::dequeue_callback, common::Unretained(this)));
is_dequeue_registered_ = true;
}
void Sender::dequeue_callback() {
auto packet = queue_end_->TryDequeue();
ASSERT(packet != nullptr);
data_controller_->OnSdu(std::move(packet));
queue_end_->UnregisterDequeue();
is_dequeue_registered_ = false;
}
void Sender::UpdateClassicConfiguration(classic::internal::ChannelConfigurationState config) {
auto mode = config.retransmission_and_flow_control_mode_;
if (mode == mode_) {
return;
}
if (mode == RetransmissionAndFlowControlModeOption::L2CAP_BASIC) {
data_controller_ =
std::make_unique<BasicModeDataController>(channel_id_, remote_channel_id_, queue_end_, handler_, scheduler_);
return;
}
if (mode == RetransmissionAndFlowControlModeOption::ENHANCED_RETRANSMISSION) {
data_controller_ =
std::make_unique<ErtmController>(link_, channel_id_, remote_channel_id_, queue_end_, handler_, scheduler_);
RetransmissionAndFlowControlConfigurationOption option = config.local_retransmission_and_flow_control_;
option.tx_window_size_ = config.remote_retransmission_and_flow_control_.tx_window_size_;
data_controller_->SetRetransmissionAndFlowControlOptions(option);
data_controller_->EnableFcs(config.fcs_type_ == FcsType::DEFAULT);
return;
}
}
} // namespace internal
} // namespace l2cap
} // namespace bluetooth
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