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/*
* Copyright 2020 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 <cstdint>
#include "hci/acl_manager/le_acl_connection.h"
#include "hci/hci_packets.h"
#include "os/handler.h"
namespace bluetooth {
namespace l2cap {
namespace le {
namespace internal {
class Link;
}
/**
* Proxy for L2CAP user to get some link layer properties (connection handle, role), and set link layer options
* (connection parameter update, set PHY). Only few special L2CAP users need to use it, including Security Manager,
* Hearing Aid Profile, HID Profile, and Java API.
* Note: Setting link layer options applies to the LINK, not single CHANNEL.
*/
class LinkOptions {
public:
/**
* Get LL Role. Most applications should NOT know its LL role.
*/
hci::Role GetRole() const;
/**
* Get ACL Handle. Most applications should NOT know its ACL handle.
*/
uint16_t GetHandle() const;
/**
* Return Local address used for initiation of this connection.
*/
hci::AddressWithType GetLocalAddress() const;
/**
* Update the LE link layer connection parameters.
* Depending on the link role and supported features, may directly send HCI command to update link, or send L2CAP
* request to advise the remote. The updated connection parameters are still determined by controller. It's a link
* layer change for performance tuning, and no host layer change should be observable by user.
* Parameters are defined in Core spec HCI 7.8.18.
* @return true iff the request is sent to controller through HCI or remote through L2CAP
* (Use it only if you know what you are doing!)
*/
bool UpdateConnectionParameter(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);
/**
* Set PHY preference. The PHY is determined by the controller.
* No host layer change should be observable by user.
* Parameters are defined in Core spec HCI 7.8.49.
* @return true iff the request is sent to controller through HCI
* (Use it only if you know what you are doing!)
*/
bool SetPhy(uint8_t all_phys, uint8_t tx_phys, uint8_t rx_phys, uint16_t phy_options);
LinkOptions(hci::acl_manager::LeAclConnection* acl_connection, internal::Link* link, os::Handler* l2cap_handler);
private:
hci::acl_manager::LeAclConnection* acl_connection_ = nullptr;
internal::Link* link_ = nullptr;
os::Handler* l2cap_handler_ = nullptr;
};
} // namespace le
} // namespace l2cap
} // namespace bluetooth
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