1 /* 2 * Copyright 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include "common/bidi_queue.h" 20 #include "common/interfaces/ILoggable.h" 21 #include "hci/acl_manager/le_acl_connection.h" 22 #include "l2cap/cid.h" 23 #include "l2cap/internal/channel_impl.h" 24 #include "l2cap/le/fixed_channel.h" 25 #include "l2cap/le/link_options.h" 26 #include "os/handler.h" 27 #include "os/log.h" 28 namespace bluetooth { 29 namespace l2cap { 30 namespace le { 31 namespace internal { 32 33 class Link; 34 35 class FixedChannelImpl : public l2cap::internal::ChannelImpl, 36 public bluetooth::common::IRedactableLoggable { 37 public: 38 FixedChannelImpl(Cid cid, Link* link, os::Handler* l2cap_handler); 39 40 FixedChannelImpl(const FixedChannelImpl&) = delete; 41 FixedChannelImpl& operator=(const FixedChannelImpl&) = delete; 42 43 virtual ~FixedChannelImpl() = default; 44 GetDevice()45 hci::AddressWithType GetDevice() const { 46 return device_; 47 } 48 49 /* Return the role we have in the associated link */ 50 virtual hci::Role GetRole() const; 51 52 virtual hci::acl_manager::LeAclConnection* GetAclConnection() const; 53 54 virtual void RegisterOnCloseCallback(os::Handler* user_handler, FixedChannel::OnCloseCallback on_close_callback); 55 56 virtual void Acquire(); 57 58 virtual void Release(); 59 IsAcquired()60 virtual bool IsAcquired() const { 61 return acquired_; 62 } 63 64 Cid GetCid() const override; 65 Cid GetRemoteCid() const override; 66 virtual void OnClosed(hci::ErrorCode status); 67 ToString()68 virtual std::string ToString() { 69 std::ostringstream ss; 70 ss << "Device " << device_ << " Cid 0x" << std::hex << cid_; 71 return ss.str(); 72 } 73 ToStringForLogging()74 std::string ToStringForLogging() const override { 75 std::ostringstream ss; 76 ss << "Device " << device_.ToStringForLogging() << " Cid 0x" << std::hex << cid_; 77 return ss.str(); 78 } 79 ToRedactedStringForLogging()80 std::string ToRedactedStringForLogging() const override { 81 std::ostringstream ss; 82 ss << "Device " << device_.ToRedactedStringForLogging() << " Cid 0x" << std::hex << cid_; 83 return ss.str(); 84 } 85 GetQueueUpEnd()86 common::BidiQueueEnd<packet::BasePacketBuilder, packet::PacketView<packet::kLittleEndian>>* GetQueueUpEnd() { 87 return channel_queue_.GetUpEnd(); 88 } 89 GetQueueDownEnd()90 common::BidiQueueEnd<packet::PacketView<packet::kLittleEndian>, packet::BasePacketBuilder>* GetQueueDownEnd() { 91 return channel_queue_.GetDownEnd(); 92 } 93 94 LinkOptions* GetLinkOptions(); 95 96 private: 97 // Constructor states 98 // For logging purpose only 99 const Cid cid_; 100 // For logging purpose only 101 const hci::AddressWithType device_; 102 // Needed to handle Acquire() and Release() 103 Link* link_; 104 os::Handler* l2cap_handler_; 105 106 // User supported states 107 os::Handler* user_handler_ = nullptr; 108 FixedChannel::OnCloseCallback on_close_callback_{}; 109 110 // Internal states 111 bool acquired_ = false; 112 bool closed_ = false; 113 hci::ErrorCode close_reason_ = hci::ErrorCode::SUCCESS; 114 static constexpr size_t kChannelQueueSize = 10; 115 common::BidiQueue<packet::PacketView<packet::kLittleEndian>, packet::BasePacketBuilder> channel_queue_{ 116 kChannelQueueSize}; 117 }; 118 119 } // namespace internal 120 } // namespace le 121 } // namespace l2cap 122 } // namespace bluetooth 123