You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
185 lines
7.3 KiB
185 lines
7.3 KiB
/*
|
|
* 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
|