| /* |
| * 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 <chrono> |
| #include <memory> |
| |
| #include "hci/acl_manager/le_acl_connection.h" |
| #include "l2cap/internal/data_pipeline_manager.h" |
| #include "l2cap/internal/dynamic_channel_allocator.h" |
| #include "l2cap/internal/fixed_channel_allocator.h" |
| #include "l2cap/internal/ilink.h" |
| #include "l2cap/internal/parameter_provider.h" |
| #include "l2cap/le/dynamic_channel_manager.h" |
| #include "l2cap/le/internal/dynamic_channel_service_manager_impl.h" |
| #include "l2cap/le/internal/fixed_channel_impl.h" |
| #include "l2cap/le/internal/fixed_channel_service_manager_impl.h" |
| #include "l2cap/le/internal/signalling_manager.h" |
| #include "l2cap/le/link_options.h" |
| #include "l2cap/le/security_enforcement_interface.h" |
| #include "os/alarm.h" |
| |
| namespace bluetooth { |
| namespace l2cap { |
| namespace le { |
| namespace internal { |
| |
| class LinkManager; |
| |
| class Link : public l2cap::internal::ILink, public hci::acl_manager::LeConnectionManagementCallbacks { |
| public: |
| Link(os::Handler* l2cap_handler, std::unique_ptr<hci::acl_manager::LeAclConnection> acl_connection, |
| l2cap::internal::ParameterProvider* parameter_provider, |
| DynamicChannelServiceManagerImpl* dynamic_service_manager, FixedChannelServiceManagerImpl* fixed_service_manager, |
| LinkManager* link_manager); |
| |
| ~Link() = default; |
| |
| inline hci::AddressWithType GetDevice() const override { |
| return acl_connection_->GetRemoteAddress(); |
| } |
| |
| struct PendingDynamicChannelConnection { |
| os::Handler* handler_; |
| DynamicChannelManager::OnConnectionOpenCallback on_open_callback_; |
| DynamicChannelManager::OnConnectionFailureCallback on_fail_callback_; |
| le::DynamicChannelConfigurationOption configuration_; |
| }; |
| |
| inline virtual hci::Role GetRole() { |
| return acl_connection_->GetRole(); |
| } |
| |
| inline virtual hci::acl_manager::LeAclConnection* GetAclConnection() { |
| return acl_connection_.get(); |
| } |
| |
| // ACL methods |
| |
| virtual void OnAclDisconnected(hci::ErrorCode reason); |
| |
| void OnDisconnection(hci::ErrorCode reason) override; |
| |
| void OnConnectionUpdate( |
| hci::ErrorCode hci_status, |
| uint16_t connection_interval, |
| uint16_t connection_latency, |
| uint16_t supervision_timeout) override; |
| |
| void OnDataLengthChange(uint16_t tx_octets, uint16_t tx_time, uint16_t rx_octets, uint16_t rx_time) override; |
| |
| void OnReadRemoteVersionInformationComplete( |
| hci::ErrorCode hci_status, uint8_t lmp_version, uint16_t manufacturer_name, uint16_t sub_version) override; |
| void OnPhyUpdate(hci::ErrorCode hci_status, uint8_t tx_phy, uint8_t rx_phy) override; |
| |
| void OnLocalAddressUpdate(hci::AddressWithType address_with_type) override; |
| |
| virtual void Disconnect(); |
| |
| // Handles connection parameter update request from remote |
| virtual void UpdateConnectionParameterFromRemote(SignalId signal_id, uint16_t conn_interval_min, |
| uint16_t conn_interval_max, uint16_t conn_latency, |
| uint16_t supervision_timeout); |
| virtual bool CheckConnectionParameters( |
| uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout); |
| |
| virtual void SendConnectionParameterUpdate(uint16_t conn_interval_min, uint16_t conn_interval_max, |
| uint16_t conn_latency, uint16_t supervision_timeout, |
| uint16_t min_ce_length, uint16_t max_ce_length); |
| |
| // FixedChannel methods |
| |
| virtual std::shared_ptr<FixedChannelImpl> AllocateFixedChannel(Cid cid, SecurityPolicy security_policy); |
| |
| virtual bool IsFixedChannelAllocated(Cid cid); |
| |
| // DynamicChannel methods |
| |
| virtual Cid ReserveDynamicChannel(); |
| |
| virtual void SendConnectionRequest(Psm psm, PendingDynamicChannelConnection pending_dynamic_channel_connection); |
| |
| void SendDisconnectionRequest(Cid local_cid, Cid remote_cid) override; |
| |
| // Invoked by signalling manager to indicate an outgoing connection request failed and link shall free resources |
| virtual void OnOutgoingConnectionRequestFail(Cid local_cid, LeCreditBasedConnectionResponseResult result); |
| |
| virtual std::shared_ptr<l2cap::internal::DynamicChannelImpl> AllocateDynamicChannel(Psm psm, Cid remote_cid); |
| |
| virtual std::shared_ptr<l2cap::internal::DynamicChannelImpl> AllocateReservedDynamicChannel(Cid reserved_cid, Psm psm, |
| Cid remote_cid); |
| |
| virtual void FreeDynamicChannel(Cid cid); |
| |
| // Check how many channels are acquired or in use, if zero, start tear down timer, if non-zero, cancel tear down timer |
| virtual void RefreshRefCount(); |
| |
| void NotifyChannelCreation(Cid cid, std::unique_ptr<DynamicChannel> user_channel); |
| void NotifyChannelFail(Cid cid, DynamicChannelManager::ConnectionResult result); |
| |
| virtual std::string ToString() { |
| return GetDevice().ToString(); |
| } |
| |
| virtual uint16_t GetMps() const; |
| |
| virtual uint16_t GetInitialCredit() const; |
| |
| void SendLeCredit(Cid local_cid, uint16_t credit) override; |
| |
| LinkOptions* GetLinkOptions() { |
| return &link_options_; |
| } |
| |
| void ReadRemoteVersionInformation(); |
| |
| void OnPendingPacketChange(Cid local_cid, bool has_packet) override; |
| |
| private: |
| os::Handler* l2cap_handler_; |
| l2cap::internal::FixedChannelAllocator<FixedChannelImpl, Link> fixed_channel_allocator_{this, l2cap_handler_}; |
| l2cap::internal::DynamicChannelAllocator dynamic_channel_allocator_{this, l2cap_handler_}; |
| std::unique_ptr<hci::acl_manager::LeAclConnection> acl_connection_; |
| l2cap::internal::DataPipelineManager data_pipeline_manager_; |
| l2cap::internal::ParameterProvider* parameter_provider_; |
| DynamicChannelServiceManagerImpl* dynamic_service_manager_; |
| LeSignallingManager signalling_manager_; |
| std::unordered_map<Cid, PendingDynamicChannelConnection> local_cid_to_pending_dynamic_channel_connection_map_; |
| os::Alarm link_idle_disconnect_alarm_{l2cap_handler_}; |
| LinkOptions link_options_{acl_connection_.get(), this, l2cap_handler_}; |
| LinkManager* link_manager_; |
| SignalId update_request_signal_id_ = kInvalidSignalId; |
| uint16_t update_request_interval_min_; |
| uint16_t update_request_interval_max_; |
| uint16_t update_request_latency_; |
| uint16_t update_request_supervision_timeout_; |
| std::atomic_int remaining_packets_to_be_sent_ = 0; |
| DISALLOW_COPY_AND_ASSIGN(Link); |
| |
| // Received connection update complete from ACL manager. SignalId is bound to a valid number when we need to send a |
| // response to remote. If SignalId is bound to an invalid number, we don't send a response to remote, because the |
| // connection update request is not from remote LL peripheral. |
| void on_connection_update_complete(SignalId signal_id, hci::ErrorCode error_code); |
| }; |
| |
| } // namespace internal |
| } // namespace le |
| } // namespace l2cap |
| } // namespace bluetooth |