1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
/*
* 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.
*/
#pragma once
#include <atomic>
#include <string>
#include <unordered_map>
#include "common/bidi_queue.h"
#include "common/bind.h"
#include "data_controller.h"
#include "l2cap/cid.h"
#include "l2cap/classic/internal/channel_configuration_state.h"
#include "l2cap/internal/channel_impl.h"
#include "l2cap/internal/data_controller.h"
#include "l2cap/l2cap_packets.h"
#include "l2cap/mtu.h"
#include "os/handler.h"
#include "os/queue.h"
#include "packet/base_packet_builder.h"
#include "packet/packet_view.h"
namespace bluetooth {
namespace l2cap {
namespace internal {
class Scheduler;
class ILink;
/**
* A middle layer between L2CAP channel and outgoing packet scheduler.
* Fetches data (SDU) from an L2CAP channel queue end, handles L2CAP segmentation, and gives data to L2CAP scheduler.
*/
class Sender {
public:
using UpperEnqueue = packet::PacketView<packet::kLittleEndian>;
using UpperDequeue = packet::BasePacketBuilder;
using UpperQueueDownEnd = common::BidiQueueEnd<UpperEnqueue, UpperDequeue>;
enum class ChannelMode {
BASIC = 0,
ERTM = 3,
LE_CREDIT_BASED = 10,
};
Sender(os::Handler* handler, ILink* link, Scheduler* scheduler, std::shared_ptr<ChannelImpl> channel);
Sender(os::Handler* handler, ILink* link, Scheduler* scheduler, std::shared_ptr<ChannelImpl> channel,
ChannelMode mode);
~Sender();
/**
* Callback from scheduler to indicate that scheduler already dequeued a packet from sender's queue.
* Segmenter can continue dequeuing from channel queue end.
*/
void OnPacketSent();
/**
* Called by the scheduler to return the next PDU to be sent
*/
std::unique_ptr<UpperDequeue> GetNextPacket();
void UpdateClassicConfiguration(classic::internal::ChannelConfigurationState config);
DataController* GetDataController();
private:
os::Handler* handler_;
ILink* link_;
UpperQueueDownEnd* queue_end_;
Scheduler* scheduler_;
const Cid channel_id_;
const Cid remote_channel_id_;
std::atomic_bool is_dequeue_registered_ = false;
RetransmissionAndFlowControlModeOption mode_ = RetransmissionAndFlowControlModeOption::L2CAP_BASIC;
std::unique_ptr<DataController> data_controller_;
void try_register_dequeue();
void dequeue_callback();
};
} // namespace internal
} // namespace l2cap
} // namespace bluetooth
|
