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 "hci/acl_manager/le_acl_connection.h" 21 #include "l2cap/cid.h" 22 #include "l2cap/internal/channel_impl.h" 23 #include "l2cap/le/fixed_channel.h" 24 #include "l2cap/le/link_options.h" 25 #include "os/handler.h" 26 #include "os/log.h" 27 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: 37 FixedChannelImpl(Cid cid, Link* link, os::Handler* l2cap_handler); 38 39 FixedChannelImpl(const FixedChannelImpl&) = delete; 40 FixedChannelImpl& operator=(const FixedChannelImpl&) = delete; 41 42 virtual ~FixedChannelImpl() = default; 43 GetDevice()44 hci::AddressWithType GetDevice() const { 45 return device_; 46 } 47 48 /* Return the role we have in the associated link */ 49 virtual hci::Role GetRole() const; 50 51 virtual hci::acl_manager::LeAclConnection* GetAclConnection() const; 52 53 virtual void RegisterOnCloseCallback(os::Handler* user_handler, FixedChannel::OnCloseCallback on_close_callback); 54 55 virtual void Acquire(); 56 57 virtual void Release(); 58 IsAcquired()59 virtual bool IsAcquired() const { 60 return acquired_; 61 } 62 63 Cid GetCid() const override; 64 Cid GetRemoteCid() const override; 65 virtual void OnClosed(hci::ErrorCode status); 66 ToString()67 virtual std::string ToString() { 68 std::ostringstream ss; 69 ss << "Device " << device_ << " Cid 0x" << std::hex << cid_; 70 return ss.str(); 71 } 72 GetQueueUpEnd()73 common::BidiQueueEnd<packet::BasePacketBuilder, packet::PacketView<packet::kLittleEndian>>* GetQueueUpEnd() { 74 return channel_queue_.GetUpEnd(); 75 } 76 GetQueueDownEnd()77 common::BidiQueueEnd<packet::PacketView<packet::kLittleEndian>, packet::BasePacketBuilder>* GetQueueDownEnd() { 78 return channel_queue_.GetDownEnd(); 79 } 80 81 LinkOptions* GetLinkOptions(); 82 83 private: 84 // Constructor states 85 // For logging purpose only 86 const Cid cid_; 87 // For logging purpose only 88 const hci::AddressWithType device_; 89 // Needed to handle Acquire() and Release() 90 Link* link_; 91 os::Handler* l2cap_handler_; 92 93 // User supported states 94 os::Handler* user_handler_ = nullptr; 95 FixedChannel::OnCloseCallback on_close_callback_{}; 96 97 // Internal states 98 bool acquired_ = false; 99 bool closed_ = false; 100 hci::ErrorCode close_reason_ = hci::ErrorCode::SUCCESS; 101 static constexpr size_t kChannelQueueSize = 10; 102 common::BidiQueue<packet::PacketView<packet::kLittleEndian>, packet::BasePacketBuilder> channel_queue_{ 103 kChannelQueueSize}; 104 }; 105 106 } // namespace internal 107 } // namespace le 108 } // namespace l2cap 109 } // namespace bluetooth 110