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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 <chrono>
#include <cstdint>
#include <memory>
#include "hci/address_with_type.h"
#include "hci/hci_packets.h"
#include "packets/link_layer_packets.h"
namespace rootcanal {
// Track a single advertising instance
class LeAdvertiser {
public:
LeAdvertiser() = default;
virtual ~LeAdvertiser() = default;
void Initialize(bluetooth::hci::AddressWithType address,
bluetooth::hci::AddressWithType peer_address,
bluetooth::hci::LeScanningFilterPolicy filter_policy,
model::packets::AdvertisementType type,
const std::vector<uint8_t>& advertisement,
const std::vector<uint8_t>& scan_response,
std::chrono::steady_clock::duration interval);
void InitializeExtended(
unsigned advertising_handle, bluetooth::hci::OwnAddressType address_type,
bluetooth::hci::AddressWithType public_address,
bluetooth::hci::AddressWithType peer_address,
bluetooth::hci::LeScanningFilterPolicy filter_policy,
model::packets::AdvertisementType type,
std::chrono::steady_clock::duration interval, uint8_t tx_power,
const std::function<bluetooth::hci::Address()>& get_address);
void SetAddress(bluetooth::hci::Address address);
void SetData(const std::vector<uint8_t>& data);
void SetScanResponse(const std::vector<uint8_t>& data);
// Generate LE Connection Complete or LE Extended Advertising Set Terminated
// events at the end of the advertising period. The advertiser is
// automatically disabled.
std::unique_ptr<bluetooth::hci::EventBuilder> GetEvent(
std::chrono::steady_clock::time_point);
std::unique_ptr<model::packets::LinkLayerPacketBuilder> GetAdvertisement(
std::chrono::steady_clock::time_point);
std::unique_ptr<model::packets::LinkLayerPacketBuilder> GetScanResponse(
bluetooth::hci::Address scanned_address,
bluetooth::hci::Address scanner_address);
void Clear();
void Disable();
void Enable();
void EnableExtended(std::chrono::milliseconds duration);
bool IsEnabled() const;
bool IsExtended() const;
bool IsConnectable() const;
uint8_t GetNumAdvertisingEvents() const;
bluetooth::hci::AddressWithType GetAddress() const;
private:
std::function<bluetooth::hci::Address()> default_get_address_ = []() {
return bluetooth::hci::Address::kEmpty;
};
std::function<bluetooth::hci::Address()>& get_address_ = default_get_address_;
bluetooth::hci::AddressWithType address_{};
bluetooth::hci::AddressWithType public_address_{};
bluetooth::hci::OwnAddressType own_address_type_;
bluetooth::hci::AddressWithType
peer_address_{}; // For directed advertisements
bluetooth::hci::LeScanningFilterPolicy filter_policy_{};
model::packets::AdvertisementType type_{};
std::vector<uint8_t> advertisement_;
std::vector<uint8_t> scan_response_;
std::chrono::steady_clock::duration interval_{};
std::chrono::steady_clock::time_point ending_time_{};
std::chrono::steady_clock::time_point last_le_advertisement_{};
static constexpr uint8_t kTxPowerUnavailable = 0x7f;
uint8_t tx_power_{kTxPowerUnavailable};
uint8_t num_events_{0};
bool extended_{false};
bool enabled_{false};
bool limited_{false}; // Set if the advertising set has a timeout.
unsigned advertising_handle_{0};
};
} // namespace rootcanal
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