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/*
* 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 <memory>
#include <unordered_map>
#include "hci/acl_manager/classic_acl_connection.h"
#include "hci/address.h"
#include "hci/class_of_device.h"
#include "l2cap/classic/dynamic_channel_manager.h"
#include "l2cap/classic/fixed_channel_manager.h"
#include "l2cap/classic/internal/dynamic_channel_service_manager_impl.h"
#include "l2cap/classic/internal/fixed_channel_service_manager_impl.h"
#include "l2cap/classic/internal/link.h"
#include "l2cap/classic/link_property_listener.h"
#include "l2cap/classic/link_security_interface.h"
#include "l2cap/internal/parameter_provider.h"
#include "l2cap/internal/scheduler.h"
#include "os/handler.h"
namespace bluetooth {
namespace l2cap {
namespace classic {
namespace internal {
class DumpsysHelper;
class LinkManager : public hci::acl_manager::ConnectionCallbacks {
public:
LinkManager(os::Handler* l2cap_handler, hci::AclManager* acl_manager,
FixedChannelServiceManagerImpl* fixed_channel_service_manager,
DynamicChannelServiceManagerImpl* dynamic_channel_service_manager,
l2cap::internal::ParameterProvider* parameter_provider)
: l2cap_handler_(l2cap_handler), acl_manager_(acl_manager),
fixed_channel_service_manager_(fixed_channel_service_manager),
dynamic_channel_service_manager_(dynamic_channel_service_manager), parameter_provider_(parameter_provider) {
acl_manager_->RegisterCallbacks(this, l2cap_handler_);
}
LinkManager(const LinkManager&) = delete;
LinkManager& operator=(const LinkManager&) = delete;
struct PendingFixedChannelConnection {
os::Handler* handler_;
FixedChannelManager::OnConnectionFailureCallback on_fail_callback_;
};
struct PendingLink {
std::vector<PendingFixedChannelConnection> pending_fixed_channel_connections_;
};
// ACL methods
Link* GetLink(hci::Address device);
void OnConnectSuccess(std::unique_ptr<hci::acl_manager::ClassicAclConnection> acl_connection) override;
void OnConnectFail(hci::Address device, hci::ErrorCode reason) override;
void HACK_OnEscoConnectRequest(hci::Address, hci::ClassOfDevice) override;
void HACK_OnScoConnectRequest(hci::Address, hci::ClassOfDevice) override;
virtual void OnDisconnect(hci::Address device, hci::ErrorCode status);
void OnAuthenticationComplete(hci::ErrorCode hci_status, hci::Address device);
void OnEncryptionChange(hci::Address device, hci::EncryptionEnabled enabled);
void OnReadRemoteVersionInformation(
hci::ErrorCode hci_status,
hci::Address device,
uint8_t lmp_version,
uint16_t manufacturer_name,
uint16_t sub_version);
void OnReadRemoteSupportedFeatures(hci::Address device, uint64_t features);
void OnReadRemoteExtendedFeatures(
hci::Address device, uint8_t page_number, uint8_t max_page_number, uint64_t features);
void OnRoleChange(hci::ErrorCode hci_status, hci::Address remote, hci::Role role);
void OnReadClockOffset(hci::Address remote, uint16_t clock_offset);
void OnModeChange(hci::ErrorCode hci_status, hci::Address remote, hci::Mode mode, uint16_t interval);
void OnSniffSubrating(
hci::ErrorCode hci_status,
hci::Address remote,
uint16_t max_tx_lat,
uint16_t max_rx_lat,
uint16_t min_remote_timeout,
uint16_t min_local_timeout);
// FixedChannelManager methods
void ConnectFixedChannelServices(hci::Address device, PendingFixedChannelConnection pending_fixed_channel_connection);
// DynamicChannelManager methods
void ConnectDynamicChannelServices(
hci::Address device, Link::PendingDynamicChannelConnection pending_connection, Psm psm);
// For SecurityModule to initiate an ACL link
void InitiateConnectionForSecurity(hci::Address remote);
// LinkManager will handle sending OnLinkConnected() callback and construct a LinkSecurityInterface proxy.
void RegisterLinkSecurityInterfaceListener(os::Handler* handler, LinkSecurityInterfaceListener* listener);
// For the link to get LinkSecurityInterfaceListener
LinkSecurityInterfaceListener* GetLinkSecurityInterfaceListener();
// Registerlink callbacks
void RegisterLinkPropertyListener(os::Handler* handler, LinkPropertyListener* listener);
// Reported by link to indicate how many pending packets are remaining to be set.
// If there is anything outstanding, don't delete link
void OnPendingPacketChange(hci::Address remote, int num_packets);
private:
// Handles requests from LinkSecurityInterface
friend class LinkSecurityInterfaceImpl;
friend class DumpsysHelper;
void handle_link_security_hold(hci::Address remote);
void handle_link_security_release(hci::Address remote);
void handle_link_security_disconnect(hci::Address remote);
void handle_link_security_ensure_authenticated(hci::Address remote);
void handle_link_security_ensure_encrypted(hci::Address remote);
// Dependencies
os::Handler* l2cap_handler_;
hci::AclManager* acl_manager_;
FixedChannelServiceManagerImpl* fixed_channel_service_manager_;
DynamicChannelServiceManagerImpl* dynamic_channel_service_manager_;
l2cap::internal::ParameterProvider* parameter_provider_;
// Internal states
std::unordered_map<hci::Address, PendingLink> pending_links_;
std::unordered_map<hci::Address, Link> links_;
std::unordered_map<hci::Address, std::list<Psm>> pending_dynamic_channels_;
std::unordered_map<hci::Address, std::list<Link::PendingDynamicChannelConnection>>
pending_dynamic_channels_callbacks_;
os::Handler* link_security_interface_listener_handler_ = nullptr;
LinkSecurityInterfaceListener* link_security_interface_listener_ = nullptr;
LinkPropertyListener* link_property_listener_ = nullptr;
os::Handler* link_property_callback_handler_ = nullptr;
std::unordered_set<hci::Address> disconnected_links_;
std::unordered_set<hci::Address> links_with_pending_packets_;
};
} // namespace internal
} // namespace classic
} // namespace l2cap
} // namespace bluetooth
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