android-16.0.0_r2/s

/*
 * 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.
 */

#include "main/shim/acl.h"

#include <base/location.h>
#include <bluetooth/log.h>
#include <com_android_bluetooth_flags.h>
#include <time.h>

#include <chrono>
#include <cstdint>
#include <deque>
#include <functional>
#include <future>
#include <map>
#include <memory>
#include <optional>
#include <queue>
#include <string>
#include <unordered_set>
#include <utility>
#include <vector>

#include "common/bind.h"
#include "common/strings.h"
#include "common/sync_map_count.h"
#include "hci/acl_manager.h"
#include "hci/acl_manager/acl_connection.h"
#include "hci/acl_manager/classic_acl_connection.h"
#include "hci/acl_manager/connection_management_callbacks.h"
#include "hci/acl_manager/le_acl_connection.h"
#include "hci/acl_manager/le_connection_management_callbacks.h"
#include "hci/address.h"
#include "hci/address_with_type.h"
#include "hci/class_of_device.h"
#include "hci/controller_interface.h"
#include "internal_include/bt_target.h"
#include "main/shim/dumpsys.h"
#include "main/shim/entry.h"
#include "main/shim/helpers.h"
#include "main/shim/stack.h"
#include "metrics/bluetooth_event.h"
#include "os/handler.h"
#include "os/wakelock_manager.h"
#include "osi/include/alarm.h"
#include "osi/include/allocator.h"
#include "osi/include/properties.h"
#include "stack/acl/acl.h"
#include "stack/btm/btm_int_types.h"
#include "stack/include/bt_hdr.h"
#include "stack/include/btm_log_history.h"
#include "stack/include/main_thread.h"
#include "types/ble_address_with_type.h"
#include "types/raw_address.h"

extern tBTM_CB btm_cb;

using namespace bluetooth;
using ::bluetooth::os::WakelockManager;

class ConnectAddressWithType {
public:
  explicit ConnectAddressWithType(hci::AddressWithType address_with_type)
      : address_(address_with_type.GetAddress()),
        type_(address_with_type.ToFilterAcceptListAddressType()) {}

  // TODO: remove this method
  std::string const ToString() const {
    std::stringstream ss;
    ss << address_.ToString() << "[" << FilterAcceptListAddressTypeText(type_) << "]";
    return ss.str();
  }

  std::string ToStringForLogging() const { return ToString(); }
  std::string ToRedactedStringForLogging() const {
    std::stringstream ss;
    ss << address_.ToRedactedStringForLogging() << "[" << FilterAcceptListAddressTypeText(type_)
       << "]";
    return ss.str();
  }
  bool operator==(const ConnectAddressWithType& rhs) const {
    return address_ == rhs.address_ && type_ == rhs.type_;
  }

private:
  friend std::hash<ConnectAddressWithType>;
  hci::Address address_;
  hci::FilterAcceptListAddressType type_;
};

namespace std {
template <>
struct hash<ConnectAddressWithType> {
  std::size_t operator()(const ConnectAddressWithType& val) const {
    static_assert(sizeof(uint64_t) >= (bluetooth::hci::Address::kLength +
                                       sizeof(bluetooth::hci::FilterAcceptListAddressType)));
    uint64_t int_addr = 0;
    memcpy(reinterpret_cast<uint8_t*>(&int_addr), val.address_.data(),
           bluetooth::hci::Address::kLength);
    memcpy(reinterpret_cast<uint8_t*>(&int_addr) + bluetooth::hci::Address::kLength, &val.type_,
           sizeof(bluetooth::hci::FilterAcceptListAddressType));
    return std::hash<uint64_t>{}(int_addr);
  }
};
}  // namespace std

namespace std {
template <>
struct formatter<ConnectAddressWithType> : formatter<std::string> {
  template <class Context>
  typename Context::iterator format(const ConnectAddressWithType& address, Context& ctx) const {
    std::string repr = address.ToRedactedStringForLogging();
    return std::formatter<std::string>::format(repr, ctx);
  }
};
}  // namespace std

namespace {

static void wakelock_release_cb(void*) {
  log::debug("Wakelock released on timeout");
  WakelockManager::Get().Release();
}

struct timed_wakelock {
  timed_wakelock() { timer_ = alarm_new("bluetooth_wakelock_timer"); }
  ~timed_wakelock() {
    if (alarm_is_scheduled(timer_)) {
      log::debug("Wakelock released");
      WakelockManager::Get().Release();
    }
    alarm_free(timer_);
  }

  // Acquire wakelock for a fixed time.
  // Acquiring again resets the timer. Wakelock is released after the time.
  void acquire(uint64_t timeout_ms) {
    // Ignore request if timeout is 0.
    if (timeout_ms == 0) {
      return;
    }
    if (!alarm_is_scheduled(timer_)) {
      log::debug("Wakelock acquired");
      WakelockManager::Get().Acquire();
    } else {
      alarm_cancel(timer_);
    }
    log::debug("Alarm set for {} ms", timeout_ms);
    alarm_set_on_mloop(timer_, timeout_ms, wakelock_release_cb, nullptr);
  }

  // Cancel timer and release wakelock.
  void release() {
    if (alarm_is_scheduled(timer_)) {
      log::debug("Wakelock released early. Time left: {} ms", alarm_get_remaining_ms(timer_));
      alarm_cancel(timer_);
      WakelockManager::Get().Release();
    }
  }

private:
  alarm_t* timer_ = nullptr;  // wakelock state is given by alarm_is_scheduled
};  // timed_wakelock

constexpr uint32_t kRunicBjarkan = 0x0016D2;
constexpr uint32_t kRunicHagall = 0x0016BC;

using HciHandle = uint16_t;
using PageNumber = uint8_t;

using CreationTime = std::chrono::time_point<std::chrono::system_clock>;
using TeardownTime = std::chrono::time_point<std::chrono::system_clock>;

constexpr char kBtmLogTag[] = "ACL";
constexpr char kWakelockTimeoutMsSysprop[] = "bluetooth.core.acl.wakelock_timeout";

using SendDataUpwards = void (*const)(BT_HDR*);
using OnDisconnect = std::function<void(HciHandle, hci::ErrorCode reason)>;

constexpr char kConnectionDescriptorTimeFormat[] = "%Y-%m-%d %H:%M:%S";

constexpr unsigned MillisPerSecond = 1000;
std::string EpochMillisToString(long long time_ms) {
  time_t time_sec = time_ms / MillisPerSecond;
  struct tm tm;
  localtime_r(&time_sec, &tm);
  std::string s = common::StringFormatTime(kConnectionDescriptorTimeFormat, tm);
  return std::format("{}.{:03}", s, time_ms % MillisPerSecond);
}

class ShadowAddressResolutionList {
public:
  explicit ShadowAddressResolutionList(uint8_t max_address_resolution_size)
      : max_address_resolution_size_(max_address_resolution_size) {}

  bool Add(const hci::AddressWithType& address_with_type) {
    if (address_resolution_set_.size() == max_address_resolution_size_) {
      log::error("Address Resolution is full size:{}", address_resolution_set_.size());
      return false;
    }
    if (!address_resolution_set_.insert(address_with_type).second) {
      log::warn("Attempted to add duplicate le address to address_resolution:{}",
                address_with_type);
    }
    return true;
  }

  bool Remove(const hci::AddressWithType& address_with_type) {
    auto iter = address_resolution_set_.find(address_with_type);
    if (iter == address_resolution_set_.end()) {
      log::warn("Unknown device being removed from address_resolution:{}", address_with_type);
      return false;
    }
    address_resolution_set_.erase(iter);
    return true;
  }

  std::unordered_set<hci::AddressWithType> GetCopy() const { return address_resolution_set_; }

  bool IsFull() const {
    return address_resolution_set_.size() == static_cast<size_t>(max_address_resolution_size_);
  }

  size_t Size() const { return address_resolution_set_.size(); }

  void Clear() { address_resolution_set_.clear(); }

  uint8_t GetMaxSize() const { return max_address_resolution_size_; }

private:
  uint8_t max_address_resolution_size_{0};
  std::unordered_set<hci::AddressWithType> address_resolution_set_;
};

struct ConnectionDescriptor {
  CreationTime creation_time_;
  TeardownTime teardown_time_;
  uint16_t handle_;
  bool is_locally_initiated_;
  hci::ErrorCode disconnect_reason_;
  ConnectionDescriptor(CreationTime creation_time, TeardownTime teardown_time, uint16_t handle,
                       bool is_locally_initiated, hci::ErrorCode disconnect_reason)
      : creation_time_(creation_time),
        teardown_time_(teardown_time),
        handle_(handle),
        is_locally_initiated_(is_locally_initiated),
        disconnect_reason_(disconnect_reason) {}
  virtual std::string GetPrivateRemoteAddress() const = 0;
  virtual ~ConnectionDescriptor() {}
  std::string ToString() const {
    return std::format(
            "peer:{} handle:0x{:04x} is_locally_initiated:{} creation_time:{} teardown_time:{} "
            "disconnect_reason:{}",
            GetPrivateRemoteAddress(), handle_, is_locally_initiated_,
            common::StringFormatTimeWithMilliseconds(kConnectionDescriptorTimeFormat,
                                                     creation_time_),
            common::StringFormatTimeWithMilliseconds(kConnectionDescriptorTimeFormat,
                                                     teardown_time_),
            hci::ErrorCodeText(disconnect_reason_));
  }
};

struct ClassicConnectionDescriptor : public ConnectionDescriptor {
  const hci::Address remote_address_;
  ClassicConnectionDescriptor(const hci::Address& remote_address, CreationTime creation_time,
                              TeardownTime teardown_time, uint16_t handle,
                              bool is_locally_initiated, hci::ErrorCode disconnect_reason)
      : ConnectionDescriptor(creation_time, teardown_time, handle, is_locally_initiated,
                             disconnect_reason),
        remote_address_(remote_address) {}
  virtual std::string GetPrivateRemoteAddress() const {
    return remote_address_.ToRedactedStringForLogging();
  }
};

struct LeConnectionDescriptor : public ConnectionDescriptor {
  const hci::AddressWithType remote_address_with_type_;
  LeConnectionDescriptor(hci::AddressWithType& remote_address_with_type, CreationTime creation_time,
                         TeardownTime teardown_time, uint16_t handle, bool is_locally_initiated,
                         hci::ErrorCode disconnect_reason)
      : ConnectionDescriptor(creation_time, teardown_time, handle, is_locally_initiated,
                             disconnect_reason),
        remote_address_with_type_(remote_address_with_type) {}
  std::string GetPrivateRemoteAddress() const {
    return remote_address_with_type_.ToRedactedStringForLogging();
  }
};

template <typename T>
class FixedQueue {
public:
  explicit FixedQueue(size_t max_size) : max_size_(max_size) {}
  void Push(T element) {
    if (queue_.size() == max_size_) {
      queue_.pop_front();
    }
    queue_.push_back(std::move(element));
  }

  std::vector<std::string> ReadElementsAsString() const {
    std::vector<std::string> vector;
    for (auto& entry : queue_) {
      vector.push_back(entry->ToString());
    }
    return vector;
  }

private:
  size_t max_size_{1};
  std::deque<T> queue_;
};

constexpr size_t kConnectionHistorySize = 40;

inline uint8_t LowByte(uint16_t val) { return val & 0xff; }
inline uint8_t HighByte(uint16_t val) { return val >> 8; }

void ValidateAclInterface(const shim::acl_interface_t& acl_interface) {
  log::assert_that(acl_interface.on_send_data_upwards != nullptr,
                   "Must provide to receive data on acl links");
  log::assert_that(acl_interface.on_packets_completed != nullptr,
                   "Must provide to receive completed packet indication");

  log::assert_that(acl_interface.connection.classic.on_connected != nullptr,
                   "Must provide to respond to successful classic connections");
  log::assert_that(acl_interface.connection.classic.on_failed != nullptr,
                   "Must provide to respond when classic connection attempts fail");
  log::assert_that(acl_interface.connection.classic.on_disconnected != nullptr,
                   "Must provide to respond when active classic connection disconnects");

  log::assert_that(acl_interface.connection.le.on_connected != nullptr,
                   "Must provide to respond to successful le connections");
  log::assert_that(acl_interface.connection.le.on_failed != nullptr,
                   "Must provide to respond when le connection attempts fail");
  log::assert_that(acl_interface.connection.le.on_disconnected != nullptr,
                   "Must provide to respond when active le connection disconnects");
}

}  // namespace

#define TRY_POSTING_ON_MAIN(cb, ...)                        \
  do {                                                      \
    if (cb == nullptr) {                                    \
      log::warn("Dropping ACL event with no callback");     \
    } else {                                                \
      do_in_main_thread(base::BindOnce(cb, ##__VA_ARGS__)); \
    }                                                       \
  } while (0)

constexpr HciHandle kInvalidHciHandle = 0xffff;

class ShimAclConnection {
public:
  ShimAclConnection(const HciHandle handle, SendDataUpwards send_data_upwards, os::Handler* handler,
                    hci::acl_manager::AclConnection::QueueUpEnd* queue_up_end,
                    CreationTime creation_time)
      : handle_(handle),
        handler_(handler),
        send_data_upwards_(send_data_upwards),
        queue_up_end_(queue_up_end),
        creation_time_(creation_time) {
    queue_up_end_->RegisterDequeue(handler_, common::Bind(&ShimAclConnection::data_ready_callback,
                                                          common::Unretained(this)));
  }

  virtual ~ShimAclConnection() {
    if (!queue_.empty()) {
      log::error(
              "ACL cleaned up with non-empty queue handle:0x{:04x} "
              "stranded_pkts:{}",
              handle_, queue_.size());
    }
    log::assert_that(is_disconnected_, "Shim Acl was not properly disconnected handle:0x{:04x}",
                     handle_);
  }

  void EnqueuePacket(std::unique_ptr<packet::RawBuilder> packet) {
    // TODO Handle queue size exceeds some threshold
    queue_.push(std::move(packet));
    RegisterEnqueue();
  }

  std::unique_ptr<packet::BasePacketBuilder> handle_enqueue() {
    auto packet = std::move(queue_.front());
    queue_.pop();
    if (queue_.empty()) {
      UnregisterEnqueue();
    }
    return packet;
  }

  void data_ready_callback() {
    auto packet = queue_up_end_->TryDequeue();
    uint16_t length = packet->size();
    std::vector<uint8_t> preamble;
    preamble.push_back(LowByte(handle_));
    preamble.push_back(HighByte(handle_));
    preamble.push_back(LowByte(length));
    preamble.push_back(HighByte(length));
    BT_HDR* p_buf = MakeLegacyBtHdrPacket(std::move(packet), preamble);
    log::assert_that(p_buf != nullptr, "Unable to allocate BT_HDR legacy packet handle:{:04x}",
                     handle_);
    if (send_data_upwards_ == nullptr) {
      log::warn("Dropping ACL data with no callback");
      osi_free(p_buf);
    } else if (do_in_main_thread(base::BindOnce(send_data_upwards_, p_buf)) != BT_STATUS_SUCCESS) {
      osi_free(p_buf);
    }
  }

  virtual void InitiateDisconnect(hci::DisconnectReason reason) = 0;
  virtual bool IsLocallyInitiated() const = 0;

  CreationTime GetCreationTime() const { return creation_time_; }
  uint16_t Handle() const { return handle_; }

  void Shutdown() {
    Disconnect();
    log::info("Shutdown and disconnect ACL connection handle:0x{:04x}", handle_);
  }

protected:
  const uint16_t handle_{kInvalidHciHandle};
  os::Handler* handler_;

  void UnregisterEnqueue() {
    if (!is_enqueue_registered_) {
      return;
    }
    is_enqueue_registered_ = false;
    queue_up_end_->UnregisterEnqueue();
  }

  void Disconnect() {
    if (is_disconnected_) {
      log::error("Cannot disconnect ACL multiple times handle:{:04x} creation_time:{}", handle_,
                 common::StringFormatTimeWithMilliseconds(kConnectionDescriptorTimeFormat,
                                                          creation_time_));
      return;
    }
    is_disconnected_ = true;
    UnregisterEnqueue();
    queue_up_end_->UnregisterDequeue();
    if (!queue_.empty()) {
      log::warn("ACL disconnect with non-empty queue handle:{:04x} stranded_pkts::{}", handle_,
                queue_.size());
    }
  }

  virtual void ReadRemoteControllerInformation() = 0;

private:
  SendDataUpwards send_data_upwards_;
  hci::acl_manager::AclConnection::QueueUpEnd* queue_up_end_;

  std::queue<std::unique_ptr<packet::RawBuilder>> queue_;
  bool is_enqueue_registered_{false};
  bool is_disconnected_{false};
  CreationTime creation_time_;

  void RegisterEnqueue() {
    log::assert_that(!is_disconnected_,
                     "Unable to send data over disconnected channel handle:{:04x}", handle_);
    if (is_enqueue_registered_) {
      return;
    }
    is_enqueue_registered_ = true;
    queue_up_end_->RegisterEnqueue(
            handler_, common::Bind(&ShimAclConnection::handle_enqueue, common::Unretained(this)));
  }

  virtual void RegisterCallbacks() = 0;
};

class ClassicShimAclConnection : public ShimAclConnection,
                                 public hci::acl_manager::ConnectionManagementCallbacks {
public:
  ClassicShimAclConnection(SendDataUpwards send_data_upwards, OnDisconnect on_disconnect,
                           const shim::acl_classic_link_interface_t& interface,
                           os::Handler* handler,
                           std::unique_ptr<hci::acl_manager::ClassicAclConnection> connection,
                           CreationTime creation_time)
      : ShimAclConnection(connection->GetHandle(), send_data_upwards, handler,
                          connection->GetAclQueueEnd(), creation_time),
        on_disconnect_(on_disconnect),
        interface_(interface),
        connection_(std::move(connection)) {}

  void RegisterCallbacks() override { connection_->RegisterCallbacks(this, handler_); }

  void ReadRemoteControllerInformation() override {
    connection_->ReadRemoteVersionInformation();
    connection_->ReadRemoteSupportedFeatures();
  }

  void OnConnectionPacketTypeChanged(uint16_t packet_type) override {
    TRY_POSTING_ON_MAIN(interface_.on_packet_type_changed, packet_type);
  }

  void OnAuthenticationComplete(hci::ErrorCode hci_status) override {
    TRY_POSTING_ON_MAIN(interface_.on_authentication_complete, handle_,
                        ToLegacyHciErrorCode(hci_status));
  }

  void OnEncryptionChange(hci::EncryptionEnabled enabled) override {
    bool is_enabled = (enabled == hci::EncryptionEnabled::ON ||
                       enabled == hci::EncryptionEnabled::BR_EDR_AES_CCM);
    TRY_POSTING_ON_MAIN(interface_.on_encryption_change, is_enabled);
  }

  void OnChangeConnectionLinkKeyComplete() override {
    TRY_POSTING_ON_MAIN(interface_.on_change_connection_link_key_complete);
  }

  void OnReadClockOffsetComplete(uint16_t /* clock_offset */) override {
    log::info("UNIMPLEMENTED");
  }

  void OnModeChange(hci::ErrorCode status, hci::Mode current_mode, uint16_t interval) override {
    TRY_POSTING_ON_MAIN(interface_.on_mode_change, ToLegacyHciErrorCode(status), handle_,
                        ToLegacyHciMode(current_mode), interval);
  }

  void OnSniffSubrating(hci::ErrorCode hci_status, uint16_t maximum_transmit_latency,
                        uint16_t maximum_receive_latency, uint16_t minimum_remote_timeout,
                        uint16_t minimum_local_timeout) {
    TRY_POSTING_ON_MAIN(interface_.on_sniff_subrating, ToLegacyHciErrorCode(hci_status), handle_,
                        maximum_transmit_latency, maximum_receive_latency, minimum_remote_timeout,
                        minimum_local_timeout);
  }

  void OnQosSetupComplete(hci::ServiceType /* service_type */, uint32_t /* token_rate */,
                          uint32_t /* peak_bandwidth */, uint32_t /* latency */,
                          uint32_t /* delay_variation */) override {
    log::info("UNIMPLEMENTED");
  }

  void OnFlowSpecificationComplete(hci::FlowDirection /* flow_direction */,
                                   hci::ServiceType /* service_type */, uint32_t /* token_rate */,
                                   uint32_t /* token_bucket_size */, uint32_t /* peak_bandwidth */,
                                   uint32_t /* access_latency */) override {
    log::info("UNIMPLEMENTED");
  }

  void OnFlushOccurred() override { log::info("UNIMPLEMENTED"); }

  void OnRoleDiscoveryComplete(hci::Role /* current_role */) override {
    log::info("UNIMPLEMENTED");
  }

  void OnReadLinkPolicySettingsComplete(uint16_t /* link_policy_settings */) override {
    log::info("UNIMPLEMENTED");
  }

  void OnReadAutomaticFlushTimeoutComplete(uint16_t /* flush_timeout */) override {
    log::info("UNIMPLEMENTED");
  }

  void OnReadTransmitPowerLevelComplete(uint8_t /* transmit_power_level */) override {
    log::info("UNIMPLEMENTED");
  }

  void OnReadLinkSupervisionTimeoutComplete(uint16_t /* link_supervision_timeout */) override {
    log::info("UNIMPLEMENTED");
  }

  void OnReadFailedContactCounterComplete(uint16_t /* failed_contact_counter */) override {
    log::info("UNIMPLEMENTED");
  }

  void OnReadLinkQualityComplete(uint8_t /* link_quality */) override {
    log::info("UNIMPLEMENTED");
  }

  void OnReadAfhChannelMapComplete(hci::AfhMode /* afh_mode */,
                                   std::array<uint8_t, 10> /* afh_channel_map */) override {
    log::info("UNIMPLEMENTED");
  }

  void OnReadRssiComplete(uint8_t /* rssi */) override { log::info("UNIMPLEMENTED"); }

  void OnReadClockComplete(uint32_t /* clock */, uint16_t /* accuracy */) override {
    log::info("UNIMPLEMENTED");
  }

  void OnCentralLinkKeyComplete(hci::KeyFlag /* key_flag */) override {
    log::info("UNIMPLEMENTED");
  }

  void OnRoleChange(hci::ErrorCode hci_status, hci::Role new_role) override {
    TRY_POSTING_ON_MAIN(interface_.on_role_change, ToLegacyHciErrorCode(hci_status),
                        ToRawAddress(connection_->GetAddress()), ToLegacyRole(new_role));
    BTM_LogHistory(kBtmLogTag, ToRawAddress(connection_->GetAddress()), "Role change",
                   std::format("classic New_role:{} status:{}", hci::RoleText(new_role),
                               hci::ErrorCodeText(hci_status)));
  }

  void OnDisconnection(hci::ErrorCode reason) override {
    Disconnect();
    on_disconnect_(handle_, reason);
  }

  void OnReadRemoteVersionInformationComplete(hci::ErrorCode hci_status, uint8_t lmp_version,
                                              uint16_t manufacturer_name,
                                              uint16_t sub_version) override {
    TRY_POSTING_ON_MAIN(interface_.on_read_remote_version_information_complete,
                        ToLegacyHciErrorCode(hci_status), handle_, lmp_version, manufacturer_name,
                        sub_version);
  }

  void OnReadRemoteSupportedFeaturesComplete(uint64_t features) override {
    TRY_POSTING_ON_MAIN(interface_.on_read_remote_supported_features_complete, handle_, features);

    if (features & (uint64_t(1) << 63)) {
      connection_->ReadRemoteExtendedFeatures(1);
      return;
    }
    log::debug("Device does not support extended features");
  }

  void OnReadRemoteExtendedFeaturesComplete(uint8_t page_number, uint8_t max_page_number,
                                            uint64_t features) override {
    TRY_POSTING_ON_MAIN(interface_.on_read_remote_extended_features_complete, handle_, page_number,
                        max_page_number, features);

    // Supported features aliases to extended features page 0
    if (page_number == 0 && !(features & (uint64_t(1) << 63))) {
      log::debug("Device does not support extended features");
      return;
    }

    if (max_page_number != 0 && page_number != max_page_number) {
      connection_->ReadRemoteExtendedFeatures(page_number + 1);
    }
  }

  hci::Address GetRemoteAddress() const { return connection_->GetAddress(); }

  void InitiateDisconnect(hci::DisconnectReason reason) override {
    connection_->Disconnect(reason);
  }

  void HoldMode(uint16_t max_interval, uint16_t min_interval) {
    log::assert_that(connection_->HoldMode(max_interval, min_interval),
                     "assert failed: connection_->HoldMode(max_interval, min_interval)");
  }

  void SniffMode(uint16_t max_interval, uint16_t min_interval, uint16_t attempt, uint16_t timeout) {
    log::assert_that(connection_->SniffMode(max_interval, min_interval, attempt, timeout),
                     "assert failed:  connection_->SniffMode(max_interval, min_interval, "
                     "attempt, timeout)");
  }

  void ExitSniffMode() {
    log::assert_that(connection_->ExitSniffMode(), "assert failed: connection_->ExitSniffMode()");
  }

  void SniffSubrating(uint16_t maximum_latency, uint16_t minimum_remote_timeout,
                      uint16_t minimum_local_timeout) {
    log::assert_that(connection_->SniffSubrating(maximum_latency, minimum_remote_timeout,
                                                 minimum_local_timeout),
                     "assert failed: connection_->SniffSubrating(maximum_latency, "
                     "minimum_remote_timeout, minimum_local_timeout)");
  }

  void SetConnectionEncryption(hci::Enable is_encryption_enabled) {
    log::assert_that(connection_->SetConnectionEncryption(is_encryption_enabled),
                     "assert failed: "
                     "connection_->SetConnectionEncryption(is_encryption_enabled)");
  }

  bool IsLocallyInitiated() const override { return connection_->locally_initiated_; }

  void Flush() { connection_->Flush(); }

private:
  OnDisconnect on_disconnect_;
  const shim::acl_classic_link_interface_t interface_;
  std::unique_ptr<hci::acl_manager::ClassicAclConnection> connection_;
};

class LeShimAclConnection : public ShimAclConnection,
                            public hci::acl_manager::LeConnectionManagementCallbacks {
public:
  LeShimAclConnection(SendDataUpwards send_data_upwards, OnDisconnect on_disconnect,
                      const shim::acl_le_link_interface_t& interface, os::Handler* handler,
                      std::unique_ptr<hci::acl_manager::LeAclConnection> connection,
                      std::chrono::time_point<std::chrono::system_clock> creation_time)
      : ShimAclConnection(connection->GetHandle(), send_data_upwards, handler,
                          connection->GetAclQueueEnd(), creation_time),
        on_disconnect_(on_disconnect),
        interface_(interface),
        connection_(std::move(connection)) {}

  void RegisterCallbacks() override { connection_->RegisterCallbacks(this, handler_); }

  void LeSubrateRequest(uint16_t subrate_min, uint16_t subrate_max, uint16_t max_latency,
                        uint16_t cont_num, uint16_t sup_tout) {
    connection_->LeSubrateRequest(subrate_min, subrate_max, max_latency, cont_num, sup_tout);
  }

  void ReadRemoteControllerInformation() override {
    // TODO Issue LeReadRemoteFeatures Command
  }

  bluetooth::hci::AddressWithType GetLocalAddressWithType() {
    return connection_->GetLocalAddress();
  }

  bluetooth::hci::AddressWithType GetLocalOtaAddressWithType() {
    return connection_->GetLocalOtaAddress();
  }

  bluetooth::hci::AddressWithType GetPeerAddressWithType() { return connection_->GetPeerAddress(); }

  bluetooth::hci::AddressWithType GetPeerOtaAddressWithType() {
    return connection_->GetPeerOtaAddress();
  }

  std::optional<uint8_t> GetAdvertisingSetConnectedTo() {
    return std::visit(
            [](auto&& data) {
              using T = std::decay_t<decltype(data)>;
              if constexpr (std::is_same_v<T, hci::acl_manager::DataAsPeripheral>) {
                return data.advertising_set_id;
              } else {
                return std::optional<uint8_t>{};
              }
            },
            connection_->GetRoleSpecificData());
  }

  void OnConnectionUpdate(hci::ErrorCode hci_status, uint16_t connection_interval,
                          uint16_t connection_latency, uint16_t supervision_timeout) {
    TRY_POSTING_ON_MAIN(interface_.on_connection_update, ToLegacyHciErrorCode(hci_status), handle_,
                        connection_interval, connection_latency, supervision_timeout);
  }
  void OnParameterUpdateRequest(uint16_t interval_min, uint16_t interval_max, uint16_t latency,
                                uint16_t supervision_timeout) {
    TRY_POSTING_ON_MAIN(interface_.on_parameter_update_request, handle_, interval_min, interval_max,
                        latency, supervision_timeout);
  }
  void OnDataLengthChange(uint16_t max_tx_octets, uint16_t max_tx_time, uint16_t max_rx_octets,
                          uint16_t max_rx_time) {
    TRY_POSTING_ON_MAIN(interface_.on_data_length_change, handle_, max_tx_octets, max_tx_time,
                        max_rx_octets, max_rx_time);
  }
  void OnLeSubrateChange(hci::ErrorCode hci_status, uint16_t subrate_factor,
                         uint16_t peripheral_latency, uint16_t continuation_number,
                         uint16_t supervision_timeout) {
    TRY_POSTING_ON_MAIN(interface_.on_le_subrate_change, handle_, subrate_factor,
                        peripheral_latency, continuation_number, supervision_timeout,
                        ToLegacyHciErrorCode(hci_status));
  }

  void OnReadRemoteVersionInformationComplete(hci::ErrorCode hci_status, uint8_t lmp_version,
                                              uint16_t manufacturer_name,
                                              uint16_t sub_version) override {
    TRY_POSTING_ON_MAIN(interface_.on_read_remote_version_information_complete,
                        ToLegacyHciErrorCode(hci_status), handle_, lmp_version, manufacturer_name,
                        sub_version);
  }

  void OnLeReadRemoteFeaturesComplete(hci::ErrorCode /* hci_status */, uint64_t /* features */) {
    // TODO
  }

  void OnPhyUpdate(hci::ErrorCode hci_status, uint8_t tx_phy, uint8_t rx_phy) override {
    TRY_POSTING_ON_MAIN(interface_.on_phy_update, ToLegacyHciErrorCode(hci_status), handle_, tx_phy,
                        rx_phy);
  }

  void OnDisconnection(hci::ErrorCode reason) {
    Disconnect();
    on_disconnect_(handle_, reason);
  }

  hci::AddressWithType GetRemoteAddressWithType() const { return connection_->GetRemoteAddress(); }

  void InitiateDisconnect(hci::DisconnectReason reason) override {
    connection_->Disconnect(reason);
  }

  bool IsLocallyInitiated() const override { return connection_->locally_initiated_; }

  bool IsInFilterAcceptList() const { return connection_->IsInFilterAcceptList(); }

  void UpdateConnectionParameters(uint16_t conn_int_min, uint16_t conn_int_max,
                                  uint16_t conn_latency, uint16_t conn_timeout, uint16_t min_ce_len,
                                  uint16_t max_ce_len) {
    connection_->LeConnectionUpdate(conn_int_min, conn_int_max, conn_latency, conn_timeout,
                                    min_ce_len, max_ce_len);
  }

private:
  OnDisconnect on_disconnect_;
  const shim::acl_le_link_interface_t interface_;
  std::unique_ptr<hci::acl_manager::LeAclConnection> connection_;
};

struct shim::Acl::impl {
  impl(uint8_t max_address_resolution_size)
      : shadow_address_resolution_list_(ShadowAddressResolutionList(max_address_resolution_size)) {}

  std::map<HciHandle, std::unique_ptr<ClassicShimAclConnection>> handle_to_classic_connection_map_;
  std::map<HciHandle, std::unique_ptr<LeShimAclConnection>> handle_to_le_connection_map_;

  SyncMapCount<std::string> classic_acl_disconnect_reason_;
  SyncMapCount<std::string> le_acl_disconnect_reason_;

  FixedQueue<std::unique_ptr<ConnectionDescriptor>> connection_history_ =
          FixedQueue<std::unique_ptr<ConnectionDescriptor>>(kConnectionHistorySize);

  ShadowAddressResolutionList shadow_address_resolution_list_;

  struct timed_wakelock wakeup_wakelock_;
  bool system_suspend_ = false;

  bool IsClassicAcl(HciHandle handle) {
    return handle_to_classic_connection_map_.find(handle) !=
           handle_to_classic_connection_map_.end();
  }

  void EnqueueClassicPacket(HciHandle handle, std::unique_ptr<packet::RawBuilder> packet) {
    log::assert_that(IsClassicAcl(handle), "handle {} is not a classic connection", handle);
    handle_to_classic_connection_map_[handle]->EnqueuePacket(std::move(packet));
  }

  void Flush(HciHandle handle) {
    if (IsClassicAcl(handle)) {
      handle_to_classic_connection_map_[handle]->Flush();
    } else {
      log::error("handle {} is not a classic connection", handle);
    }
  }

  bool IsLeAcl(HciHandle handle) {
    return handle_to_le_connection_map_.find(handle) != handle_to_le_connection_map_.end();
  }

  void EnqueueLePacket(HciHandle handle, std::unique_ptr<packet::RawBuilder> packet) {
    log::assert_that(IsLeAcl(handle), "handle {} is not a LE connection", handle);
    handle_to_le_connection_map_[handle]->EnqueuePacket(std::move(packet));
  }

  void DisconnectClassicConnections(std::promise<void> promise) {
    log::info("Disconnect gd acl shim classic connections");
    std::vector<HciHandle> disconnect_handles;
    for (auto& connection : handle_to_classic_connection_map_) {
      disconnect_classic(connection.first, HCI_ERR_REMOTE_POWER_OFF, "Suspend disconnect");
      disconnect_handles.push_back(connection.first);
    }

#ifndef TARGET_FLOSS
    // Since this is a suspend disconnect, we immediately also call
    // |OnClassicSuspendInitiatedDisconnect| without waiting for it to happen.
    // We want the stack to clean up ahead of the link layer (since we will mask
    // away that event). The reason we do this in a separate loop is that this
    // will also remove the handle from the connection map.
    for (auto& handle : disconnect_handles) {
      auto found = handle_to_classic_connection_map_.find(handle);
      if (found != handle_to_classic_connection_map_.end()) {
        GetAclManager()->OnClassicSuspendInitiatedDisconnect(
                found->first, hci::ErrorCode::CONNECTION_TERMINATED_BY_LOCAL_HOST);
      }
    }
#endif
    promise.set_value();
  }

  void ShutdownClassicConnections(std::promise<void> promise) {
    log::info("Shutdown gd acl shim classic connections");
    for (auto& connection : handle_to_classic_connection_map_) {
      connection.second->Shutdown();
    }
    handle_to_classic_connection_map_.clear();
    promise.set_value();
  }

  void DisconnectLeConnections(std::promise<void> promise) {
    log::info("Disconnect gd acl shim le connections");
    std::vector<HciHandle> disconnect_handles;
    for (auto& connection : handle_to_le_connection_map_) {
      disconnect_le(connection.first, HCI_ERR_REMOTE_POWER_OFF, "Suspend disconnect");
      disconnect_handles.push_back(connection.first);
    }

#ifndef TARGET_FLOSS
    // Since this is a suspend disconnect, we immediately also call
    // |OnLeSuspendInitiatedDisconnect| without waiting for it to happen. We
    // want the stack to clean up ahead of the link layer (since we will mask
    // away that event). The reason we do this in a separate loop is that this
    // will also remove the handle from the connection map.
    for (auto& handle : disconnect_handles) {
      auto found = handle_to_le_connection_map_.find(handle);
      if (found != handle_to_le_connection_map_.end()) {
        GetAclManager()->OnLeSuspendInitiatedDisconnect(
                found->first, hci::ErrorCode::CONNECTION_TERMINATED_BY_LOCAL_HOST);
      }
    }
#endif
    promise.set_value();
  }

  void ShutdownLeConnections(std::promise<void> promise) {
    log::info("Shutdown gd acl shim le connections");
    for (auto& connection : handle_to_le_connection_map_) {
      connection.second->Shutdown();
    }
    handle_to_le_connection_map_.clear();
    promise.set_value();
  }

  void FinalShutdown(std::promise<void> promise) {
    if (!handle_to_classic_connection_map_.empty()) {
      for (auto& connection : handle_to_classic_connection_map_) {
        connection.second->Shutdown();
      }
      handle_to_classic_connection_map_.clear();
      log::info("Cleared all classic connections count:{}",
                handle_to_classic_connection_map_.size());
    }

    if (!handle_to_le_connection_map_.empty()) {
      for (auto& connection : handle_to_le_connection_map_) {
        connection.second->Shutdown();
      }
      handle_to_le_connection_map_.clear();
      log::info("Cleared all le connections count:{}", handle_to_le_connection_map_.size());
    }
    promise.set_value();
  }

  void HoldMode(HciHandle handle, uint16_t max_interval, uint16_t min_interval) {
    log::assert_that(IsClassicAcl(handle), "handle {} is not a classic connection", handle);
    handle_to_classic_connection_map_[handle]->HoldMode(max_interval, min_interval);
  }

  void ExitSniffMode(HciHandle handle) {
    log::assert_that(IsClassicAcl(handle), "handle {} is not a classic connection", handle);
    handle_to_classic_connection_map_[handle]->ExitSniffMode();
  }

  void SniffMode(HciHandle handle, uint16_t max_interval, uint16_t min_interval, uint16_t attempt,
                 uint16_t timeout) {
    log::assert_that(IsClassicAcl(handle), "handle {} is not a classic connection", handle);
    handle_to_classic_connection_map_[handle]->SniffMode(max_interval, min_interval, attempt,
                                                         timeout);
  }

  void SniffSubrating(HciHandle handle, uint16_t maximum_latency, uint16_t minimum_remote_timeout,
                      uint16_t minimum_local_timeout) {
    log::assert_that(IsClassicAcl(handle), "handle {} is not a classic connection", handle);
    handle_to_classic_connection_map_[handle]->SniffSubrating(
            maximum_latency, minimum_remote_timeout, minimum_local_timeout);
  }

  void LeSubrateRequest(HciHandle handle, uint16_t subrate_min, uint16_t subrate_max,
                        uint16_t max_latency, uint16_t cont_num, uint16_t sup_tout) {
    if (IsLeAcl(handle)) {
      handle_to_le_connection_map_[handle]->LeSubrateRequest(subrate_min, subrate_max, max_latency,
                                                             cont_num, sup_tout);
    } else {
      log::info("handle {} is not a LE connection", handle);
    }
  }

  void SetConnectionEncryption(HciHandle handle, hci::Enable enable) {
    log::assert_that(IsClassicAcl(handle), "handle {} is not a classic connection", handle);
    handle_to_classic_connection_map_[handle]->SetConnectionEncryption(enable);
  }

  void disconnect_classic(uint16_t handle, tHCI_STATUS reason, std::string comment) {
    auto connection = handle_to_classic_connection_map_.find(handle);
    if (connection != handle_to_classic_connection_map_.end()) {
      auto remote_address = connection->second->GetRemoteAddress();
      connection->second->InitiateDisconnect(ToDisconnectReasonFromLegacy(reason));
      log::debug("Disconnection initiated classic remote:{} handle:{}", remote_address, handle);
      BTM_LogHistory(
              kBtmLogTag, ToRawAddress(remote_address), "Disconnection initiated",
              std::format("classic reason:{} comment:{}", hci_status_code_text(reason), comment));
      classic_acl_disconnect_reason_.Put(comment);
    } else {
      log::warn("Unable to disconnect unknown classic connection handle:0x{:04x}", handle);
    }
  }

  void disconnect_le(uint16_t handle, tHCI_STATUS reason, std::string comment) {
    auto connection = handle_to_le_connection_map_.find(handle);
    if (connection != handle_to_le_connection_map_.end()) {
      auto remote_address_with_type = connection->second->GetRemoteAddressWithType();
      GetAclManager()->RemoveFromBackgroundList(remote_address_with_type);
      connection->second->InitiateDisconnect(ToDisconnectReasonFromLegacy(reason));
      log::debug("Disconnection initiated le remote:{} handle:{}", remote_address_with_type,
                 handle);
      BTM_LogHistory(kBtmLogTag, ToLegacyAddressWithType(remote_address_with_type),
                     "Disconnection initiated",
                     std::format("Le reason:{} comment:{}", hci_status_code_text(reason), comment));
      le_acl_disconnect_reason_.Put(comment);
    } else {
      log::warn("Unable to disconnect unknown le connection handle:0x{:04x}", handle);
    }
  }

  void update_connection_parameters(uint16_t handle, uint16_t conn_int_min, uint16_t conn_int_max,
                                    uint16_t conn_latency, uint16_t conn_timeout,
                                    uint16_t min_ce_len, uint16_t max_ce_len) {
    auto connection = handle_to_le_connection_map_.find(handle);
    if (connection == handle_to_le_connection_map_.end()) {
      log::warn("Unknown le connection handle:0x{:04x}", handle);
      return;
    }
    connection->second->UpdateConnectionParameters(conn_int_min, conn_int_max, conn_latency,
                                                   conn_timeout, min_ce_len, max_ce_len);
  }

  void get_connection_local_address(uint16_t handle, bool ota_address,
                                    std::promise<bluetooth::hci::AddressWithType> promise) {
    log::debug("get_connection_local_address handle:{} ota_address:{}", handle, ota_address);
    bluetooth::hci::AddressWithType address_with_type;
    for (auto& [acl_handle, connection] : handle_to_le_connection_map_) {
      if (acl_handle != handle) {
        continue;
      }

      if (ota_address) {
        promise.set_value(connection->GetLocalOtaAddressWithType());
        return;
      }
      promise.set_value(connection->GetLocalAddressWithType());
      return;
    }
    log::warn("address not found!");
    promise.set_value(address_with_type);
    return;
  }

  void get_connection_peer_address(uint16_t handle, bool ota_address,
                                   std::promise<bluetooth::hci::AddressWithType> promise) {
    log::debug("get_connection_peer_address handle:{} ota_address:{}", handle, ota_address);
    bluetooth::hci::AddressWithType address_with_type;
    for (auto& [acl_handle, connection] : handle_to_le_connection_map_) {
      if (acl_handle != handle) {
        continue;
      }

      if (ota_address) {
        promise.set_value(connection->GetPeerOtaAddressWithType());
        return;
      }
      promise.set_value(connection->GetPeerAddressWithType());
      return;
    }
    log::warn("address not found!");
    promise.set_value(address_with_type);
    return;
  }

  void get_advertising_set_connected_to(const RawAddress& remote_bda,
                                        std::promise<std::optional<uint8_t>> promise) {
    log::debug("get_advertising_set_connected_to {}", remote_bda);
    auto remote_address = ToGdAddress(remote_bda);
    for (auto& [handle, connection] : handle_to_le_connection_map_) {
      if (connection->GetRemoteAddressWithType().GetAddress() == remote_address) {
        promise.set_value(connection->GetAdvertisingSetConnectedTo());
        return;
      }
    }
    log::warn("address not found!");
    promise.set_value({});
    return;
  }

  void clear_acceptlist() { GetAclManager()->ClearFilterAcceptList(); }

  void AddToAddressResolution(const hci::AddressWithType& address_with_type,
                              const std::array<uint8_t, 16>& peer_irk,
                              const std::array<uint8_t, 16>& local_irk) {
    if (shadow_address_resolution_list_.IsFull()) {
      log::warn("Le Address Resolution list is full size:{}",
                shadow_address_resolution_list_.Size());
      return;
    }
    // TODO This should really be added upon successful completion
    shadow_address_resolution_list_.Add(address_with_type);
    GetAclManager()->AddDeviceToResolvingList(address_with_type, peer_irk, local_irk);
  }

  void RemoveFromAddressResolution(const hci::AddressWithType& address_with_type) {
    // TODO This should really be removed upon successful removal
    if (!shadow_address_resolution_list_.Remove(address_with_type)) {
      log::warn("Unable to remove from Le Address Resolution list device:{}", address_with_type);
    }
    GetAclManager()->RemoveDeviceFromResolvingList(address_with_type);
  }

  void ClearResolvingList() {
    GetAclManager()->ClearResolvingList();
    // TODO This should really be cleared after successful clear status
    shadow_address_resolution_list_.Clear();
  }

  void SetSystemSuspendState(bool suspended) { GetAclManager()->SetSystemSuspendState(suspended); }

  void DumpConnectionHistory() const {
    std::vector<std::string> history = connection_history_.ReadElementsAsString();
    for (auto& entry : history) {
      log::debug("{}", entry);
    }
  }

#define DUMPSYS_TAG "shim::acl"
  void DumpConnectionHistory(int fd) const {
    std::vector<std::string> history = connection_history_.ReadElementsAsString();
    for (auto& entry : history) {
      LOG_DUMPSYS(fd, "%s", entry.c_str());
    }
    if (classic_acl_disconnect_reason_.Size() > 0) {
      LOG_DUMPSYS(fd, "Classic sources of initiated disconnects");
      for (const auto& item : classic_acl_disconnect_reason_.GetSortedHighToLow()) {
        LOG_DUMPSYS(fd, "  %s:%zu", item.item.c_str(), item.count);
      }
    }
    if (le_acl_disconnect_reason_.Size() > 0) {
      LOG_DUMPSYS(fd, "Le sources of initiated disconnects");
      for (const auto& item : le_acl_disconnect_reason_.GetSortedHighToLow()) {
        LOG_DUMPSYS(fd, "  %s:%zu", item.item.c_str(), item.count);
      }
    }

    auto address_resolution_list = shadow_address_resolution_list_.GetCopy();
    LOG_DUMPSYS(fd,
                "Shadow le address resolution list  size:%-3zu "
                "controller_max_size:%hhu",
                address_resolution_list.size(), shadow_address_resolution_list_.GetMaxSize());
    unsigned cnt = 0;
    for (auto& entry : address_resolution_list) {
      LOG_DUMPSYS(fd, "  %03u %s", ++cnt, entry.ToRedactedStringForLogging().c_str());
    }
  }
#undef DUMPSYS_TAG
};

#define DUMPSYS_TAG "shim::acl"
void DumpsysAcl(int fd) {
  const tACL_CB& acl_cb = btm_cb.acl_cb_;

  LOG_DUMPSYS_TITLE(fd, DUMPSYS_TAG);

  if (shim::Stack::GetInstance()->IsRunning()) {
    shim::Stack::GetInstance()->GetAcl()->DumpConnectionHistory(fd);
  }

  for (int i = 0; i < MAX_L2CAP_LINKS; i++) {
    const tACL_CONN& link = acl_cb.acl_db[i];
    if (!link.in_use) {
      continue;
    }

    LOG_DUMPSYS(fd, "remote_addr:%s handle:0x%04x transport:%s",
                link.remote_addr.ToRedactedStringForLogging().c_str(), link.hci_handle,
                bt_transport_text(link.transport).c_str());
    LOG_DUMPSYS(fd, "    link_up_issued:%5s", (link.link_up_issued) ? "true" : "false");
    LOG_DUMPSYS(fd, "    flush_timeout:0x%04x", link.flush_timeout_in_ticks);
    LOG_DUMPSYS(fd, "    link_supervision_timeout:%.3f sec",
                ticks_to_seconds(link.link_super_tout));
    LOG_DUMPSYS(fd, "    disconnect_reason:0x%02x", link.disconnect_reason);

    if (link.is_transport_br_edr()) {
      for (int j = 0; j < HCI_EXT_FEATURES_PAGE_MAX + 1; j++) {
        if (!link.peer_lmp_feature_valid[j]) {
          continue;
        }
        LOG_DUMPSYS(fd, "    peer_lmp_features[%d] valid:%s data:%s", j,
                    common::ToString(link.peer_lmp_feature_valid[j]).c_str(),
                    bd_features_text(link.peer_lmp_feature_pages[j]).c_str());
      }
      LOG_DUMPSYS(fd, "    [classic] link_policy:%s",
                  link_policy_text(static_cast<tLINK_POLICY>(link.link_policy)).c_str());
      LOG_DUMPSYS(fd, "    [classic] sniff_subrating:%s",
                  common::ToString(HCI_SNIFF_SUB_RATE_SUPPORTED(link.peer_lmp_feature_pages[0]))
                          .c_str());

      LOG_DUMPSYS(fd, "    pkt_types_mask:0x%04x", link.pkt_types_mask);
      LOG_DUMPSYS(fd, "    role:%s", RoleText(link.link_role).c_str());
    } else if (link.is_transport_ble()) {
      LOG_DUMPSYS(fd, "    [le] peer_features valid:%s data:%s",
                  common::ToString(link.peer_le_features_valid).c_str(),
                  bd_features_text(link.peer_le_features).c_str());

      LOG_DUMPSYS(fd, "    [le] active_remote_addr:%s[%s]",
                  link.active_remote_addr.ToRedactedStringForLogging().c_str(),
                  AddressTypeText(link.active_remote_addr_type).c_str());
    }
  }
}
#undef DUMPSYS_TAG

#define DUMPSYS_TAG "shim::stack"
void DumpsysNeighbor(int fd) {
  LOG_DUMPSYS(fd, "Stack information %lc%lc", kRunicBjarkan, kRunicHagall);
  if (btm_cb.neighbor.classic_inquiry.start_time_ms == 0) {
    LOG_DUMPSYS(fd, "Classic inquiry:disabled");
  } else {
    LOG_DUMPSYS(fd, "Classic inquiry:enabled duration_s:%.3f results:%lu",
                (timestamper_in_milliseconds.GetTimestamp() -
                 btm_cb.neighbor.classic_inquiry.start_time_ms) /
                        1000.0,
                (unsigned long)btm_cb.neighbor.classic_inquiry.results);
  }
  if (btm_cb.neighbor.le_scan.start_time_ms == 0) {
    LOG_DUMPSYS(fd, "Le scan:disabled");
  } else {
    LOG_DUMPSYS(
            fd, "Le scan:enabled duration_s:%.3f results:%lu",
            (timestamper_in_milliseconds.GetTimestamp() - btm_cb.neighbor.le_scan.start_time_ms) /
                    1000.0,
            (unsigned long)btm_cb.neighbor.le_scan.results);
  }
  const auto copy = btm_cb.neighbor.inquiry_history_->Pull();
  LOG_DUMPSYS(fd, "Last %zu inquiry scans:", copy.size());
  for (const auto& it : copy) {
    LOG_DUMPSYS(fd,
                "  %s - %s duration_ms:%-5llu num_resp:%-2u"
                " std:%-2u rssi:%-2u ext:%-2u %12s",
                EpochMillisToString(it.entry.start_time_ms).c_str(),
                EpochMillisToString(it.timestamp).c_str(),
                (unsigned long long)(it.timestamp - it.entry.start_time_ms), it.entry.num_resp,
                it.entry.resp_type[BTM_INQ_RESULT_STANDARD],
                it.entry.resp_type[BTM_INQ_RESULT_WITH_RSSI],
                it.entry.resp_type[BTM_INQ_RESULT_EXTENDED],
                btm_inquiry_cmpl_status_text(it.entry.status).c_str());
  }
}
#undef DUMPSYS_TAG

void shim::Acl::Dump(int fd) const {
  DumpsysNeighbor(fd);
  DumpsysAcl(fd);
}

shim::Acl::Acl(os::Handler* handler, const acl_interface_t& acl_interface,
               uint8_t max_address_resolution_size)
    : handler_(handler), acl_interface_(acl_interface) {
  log::assert_that(handler_ != nullptr, "assert failed: handler_ != nullptr");
  ValidateAclInterface(acl_interface_);
  pimpl_ = std::make_unique<Acl::impl>(max_address_resolution_size);
  GetAclManager()->RegisterCallbacks(this, handler_);
  GetAclManager()->RegisterLeCallbacks(this, handler_);
  GetController()->RegisterCompletedMonitorAclPacketsCallback(
          handler->BindOn(this, &Acl::on_incoming_acl_credits));
  shim::RegisterDumpsysFunction(static_cast<void*>(this), [this](int fd) { Dump(fd); });
}

shim::Acl::~Acl() {
  shim::UnregisterDumpsysFunction(static_cast<void*>(this));
  GetController()->UnregisterCompletedMonitorAclPacketsCallback();

  if (CheckForOrphanedAclConnections()) {
    pimpl_->DumpConnectionHistory();
  }
}

bool shim::Acl::CheckForOrphanedAclConnections() const {
  bool orphaned_acl_connections = false;

  if (!pimpl_->handle_to_classic_connection_map_.empty()) {
    log::error("About to destroy classic active ACL");
    for (const auto& connection : pimpl_->handle_to_classic_connection_map_) {
      log::error("Orphaned classic ACL handle:0x{:04x} bd_addr:{} created:{}",
                 connection.second->Handle(), connection.second->GetRemoteAddress(),
                 common::StringFormatTimeWithMilliseconds(kConnectionDescriptorTimeFormat,
                                                          connection.second->GetCreationTime()));
    }
    orphaned_acl_connections = true;
  }

  if (!pimpl_->handle_to_le_connection_map_.empty()) {
    log::error("About to destroy le active ACL");
    for (const auto& connection : pimpl_->handle_to_le_connection_map_) {
      log::error("Orphaned le ACL handle:0x{:04x} bd_addr:{} created:{}",
                 connection.second->Handle(), connection.second->GetRemoteAddressWithType(),
                 common::StringFormatTimeWithMilliseconds(kConnectionDescriptorTimeFormat,
                                                          connection.second->GetCreationTime()));
    }
    orphaned_acl_connections = true;
  }
  return orphaned_acl_connections;
}

void shim::Acl::on_incoming_acl_credits(uint16_t handle, uint16_t credits) {
  TRY_POSTING_ON_MAIN(acl_interface_.on_packets_completed, handle, credits);
}

void shim::Acl::write_data_sync(HciHandle handle, std::unique_ptr<packet::RawBuilder> packet) {
  if (pimpl_->IsClassicAcl(handle)) {
    pimpl_->EnqueueClassicPacket(handle, std::move(packet));
  } else if (pimpl_->IsLeAcl(handle)) {
    pimpl_->EnqueueLePacket(handle, std::move(packet));
  } else {
    log::error("Unable to find destination to write data\n");
  }
}

void shim::Acl::WriteData(HciHandle handle, std::unique_ptr<packet::RawBuilder> packet) {
  handler_->Post(common::BindOnce(&Acl::write_data_sync, common::Unretained(this), handle,
                                  std::move(packet)));
}

void shim::Acl::flush(HciHandle handle) { pimpl_->Flush(handle); }

void shim::Acl::Flush(HciHandle handle) {
  handler_->Post(common::BindOnce(&Acl::flush, common::Unretained(this), handle));
}

void shim::Acl::CreateClassicConnection(const hci::Address& address) {
  GetAclManager()->CreateConnection(address);
  log::debug("Connection initiated for classic to remote:{}", address);
  BTM_LogHistory(kBtmLogTag, ToRawAddress(address), "Initiated connection", "classic");
}

void shim::Acl::CancelClassicConnection(const hci::Address& address) {
  GetAclManager()->CancelConnect(address);
  log::debug("Connection cancelled for classic to remote:{}", address);
  BTM_LogHistory(kBtmLogTag, ToRawAddress(address), "Cancelled connection", "classic");
}

void shim::Acl::OnClassicLinkDisconnected(HciHandle handle, hci::ErrorCode reason) {
  hci::Address remote_address =
          pimpl_->handle_to_classic_connection_map_[handle]->GetRemoteAddress();
  CreationTime creation_time = pimpl_->handle_to_classic_connection_map_[handle]->GetCreationTime();
  bool is_locally_initiated =
          pimpl_->handle_to_classic_connection_map_[handle]->IsLocallyInitiated();

  TeardownTime teardown_time = std::chrono::system_clock::now();

  bluetooth::metrics::LogAclDisconnectionEvent(remote_address, reason, is_locally_initiated);

  pimpl_->handle_to_classic_connection_map_.erase(handle);
  TRY_POSTING_ON_MAIN(acl_interface_.connection.classic.on_disconnected,
                      ToLegacyHciErrorCode(hci::ErrorCode::SUCCESS), handle,
                      ToLegacyHciErrorCode(reason));
  log::debug("Disconnected classic link remote:{} handle:{} reason:{}", remote_address, handle,
             ErrorCodeText(reason));
  BTM_LogHistory(kBtmLogTag, ToRawAddress(remote_address), "Disconnected",
                 std::format("classic reason:{}", ErrorCodeText(reason)));
  pimpl_->connection_history_.Push(std::make_unique<ClassicConnectionDescriptor>(
          remote_address, creation_time, teardown_time, handle, is_locally_initiated, reason));
}

void shim::Acl::GetConnectionLocalAddress(
        uint16_t handle, bool ota_address, std::promise<bluetooth::hci::AddressWithType> promise) {
  log::debug("GetConnectionLocalAddress handle:{} ota_address:{}", handle, ota_address);
  handler_->CallOn(pimpl_.get(), &Acl::impl::get_connection_local_address, handle, ota_address,
                   std::move(promise));
}

void shim::Acl::GetConnectionPeerAddress(
        uint16_t handle, bool ota_address, std::promise<bluetooth::hci::AddressWithType> promise) {
  log::debug("GetConnectionPeerAddress handle:{} ota_address:{}", handle, ota_address);
  handler_->CallOn(pimpl_.get(), &Acl::impl::get_connection_peer_address, handle, ota_address,
                   std::move(promise));
}

void shim::Acl::GetAdvertisingSetConnectedTo(const RawAddress& remote_bda,
                                                     std::promise<std::optional<uint8_t>> promise) {
  log::debug("GetAdvertisingSetConnectedTo {}", remote_bda);
  handler_->CallOn(pimpl_.get(), &Acl::impl::get_advertising_set_connected_to, remote_bda,
                   std::move(promise));
}

void shim::Acl::OnLeLinkDisconnected(HciHandle handle, hci::ErrorCode reason) {
  hci::AddressWithType remote_address_with_type =
          pimpl_->handle_to_le_connection_map_[handle]->GetRemoteAddressWithType();
  CreationTime creation_time = pimpl_->handle_to_le_connection_map_[handle]->GetCreationTime();
  bool is_locally_initiated = pimpl_->handle_to_le_connection_map_[handle]->IsLocallyInitiated();

  TeardownTime teardown_time = std::chrono::system_clock::now();

  pimpl_->handle_to_le_connection_map_.erase(handle);
  TRY_POSTING_ON_MAIN(acl_interface_.connection.le.on_disconnected,
                      ToLegacyHciErrorCode(hci::ErrorCode::SUCCESS), handle,
                      ToLegacyHciErrorCode(reason));
  log::debug("Disconnected le link remote:{} handle:{} reason:{}", remote_address_with_type, handle,
             ErrorCodeText(reason));
  BTM_LogHistory(kBtmLogTag, ToLegacyAddressWithType(remote_address_with_type), "Disconnected",
                 std::format("Le reason:{}", ErrorCodeText(reason)));
  pimpl_->connection_history_.Push(std::make_unique<LeConnectionDescriptor>(
          remote_address_with_type, creation_time, teardown_time, handle, is_locally_initiated,
          reason));
}

void shim::Acl::OnConnectSuccess(
        std::unique_ptr<hci::acl_manager::ClassicAclConnection> connection) {
  log::assert_that(connection != nullptr, "assert failed: connection != nullptr");
  auto handle = connection->GetHandle();
  bool locally_initiated = connection->locally_initiated_;
  const hci::Address remote_address = connection->GetAddress();
  const RawAddress bd_addr = ToRawAddress(remote_address);

  pimpl_->handle_to_classic_connection_map_.emplace(
          handle, std::make_unique<ClassicShimAclConnection>(
                          acl_interface_.on_send_data_upwards,
                          std::bind(&shim::Acl::OnClassicLinkDisconnected, this,
                                    std::placeholders::_1, std::placeholders::_2),
                          acl_interface_.link.classic, handler_, std::move(connection),
                          std::chrono::system_clock::now()));
  pimpl_->handle_to_classic_connection_map_[handle]->RegisterCallbacks();
  pimpl_->handle_to_classic_connection_map_[handle]->ReadRemoteControllerInformation();

  TRY_POSTING_ON_MAIN(acl_interface_.connection.classic.on_connected, bd_addr, handle, false,
                      locally_initiated);
  log::debug("Connection successful classic remote:{} handle:{} initiator:{}", remote_address,
             handle, (locally_initiated) ? "local" : "remote");
  metrics::LogAclCompletionEvent(remote_address, hci::ErrorCode::SUCCESS, locally_initiated);
  BTM_LogHistory(kBtmLogTag, ToRawAddress(remote_address), "Connection successful",
                 (locally_initiated) ? "classic Local initiated" : "classic Remote initiated");
}

void shim::Acl::OnConnectRequest(hci::Address address, hci::ClassOfDevice cod) {
  const RawAddress bd_addr = ToRawAddress(address);
  const DEV_CLASS dev_class = ToDevClass(cod);

  if (com::android::bluetooth::flags::adapter_suspend_mgmt()) {
    if (pimpl_->system_suspend_) {
      pimpl_->wakeup_wakelock_.acquire(
              (uint64_t)osi_property_get_int32(kWakelockTimeoutMsSysprop, 0));
    }
  }

  TRY_POSTING_ON_MAIN(acl_interface_.connection.classic.on_connect_request, bd_addr, cod);
  log::debug("Received connect request remote:{} gd_cod:{} legacy_dev_class:{}", address,
             cod.ToString(), dev_class_text(dev_class));
  BTM_LogHistory(
          kBtmLogTag, ToRawAddress(address), "Connection request",
          std::format("gd_cod:{} legacy_dev_class:{}", cod.ToString(), dev_class_text(dev_class)));
}

void shim::Acl::OnConnectFail(hci::Address address, hci::ErrorCode reason, bool locally_initiated) {
  const RawAddress bd_addr = ToRawAddress(address);
  TRY_POSTING_ON_MAIN(acl_interface_.connection.classic.on_failed, bd_addr,
                      ToLegacyHciErrorCode(reason), locally_initiated);
  log::warn("Connection failed classic remote:{} reason:{}", address, hci::ErrorCodeText(reason));
  metrics::LogAclCompletionEvent(address, reason, locally_initiated);
  BTM_LogHistory(kBtmLogTag, ToRawAddress(address), "Connection failed",
                 std::format("classic reason:{}", hci::ErrorCodeText(reason)));
}

void shim::Acl::OnLeConnectSuccess(hci::AddressWithType address_with_type,
                                   std::unique_ptr<hci::acl_manager::LeAclConnection> connection) {
  log::assert_that(connection != nullptr, "assert failed: connection != nullptr");
  auto handle = connection->GetHandle();

  if (com::android::bluetooth::flags::adapter_suspend_mgmt()) {
    if (pimpl_->system_suspend_) {
      pimpl_->wakeup_wakelock_.acquire(
              (uint64_t)osi_property_get_int32(kWakelockTimeoutMsSysprop, 0));
    }
  }

  // Save the peer address, if any
  hci::AddressWithType peer_address_with_type = connection->peer_address_with_type_;

  hci::Role connection_role = connection->GetRole();
  bool locally_initiated = connection->locally_initiated_;

  uint16_t conn_interval = connection->interval_;
  uint16_t conn_latency = connection->latency_;
  uint16_t conn_timeout = connection->supervision_timeout_;

  RawAddress local_rpa = ToRawAddress(connection->local_resolvable_private_address_);
  RawAddress peer_rpa = ToRawAddress(connection->peer_resolvable_private_address_);
  tBLE_ADDR_TYPE peer_addr_type =
          (tBLE_ADDR_TYPE)connection->peer_address_with_type_.GetAddressType();

  auto can_read_discoverable_characteristics = std::visit(
          [&](auto&& data) {
            using T = std::decay_t<decltype(data)>;
            if constexpr (std::is_same_v<T, hci::acl_manager::DataAsPeripheral>) {
              return data.connected_to_discoverable;
            } else {
              // if we are the central, the peer can always see discoverable
              // characteristics
              return true;
            }
          },
          connection->GetRoleSpecificData());

  pimpl_->handle_to_le_connection_map_.emplace(
          handle, std::make_unique<LeShimAclConnection>(
                          acl_interface_.on_send_data_upwards,
                          std::bind(&shim::Acl::OnLeLinkDisconnected, this, std::placeholders::_1,
                                    std::placeholders::_2),
                          acl_interface_.link.le, handler_, std::move(connection),
                          std::chrono::system_clock::now()));
  pimpl_->handle_to_le_connection_map_[handle]->RegisterCallbacks();

  if (!pimpl_->handle_to_le_connection_map_[handle]->IsInFilterAcceptList() &&
      connection_role == hci::Role::CENTRAL) {
    pimpl_->handle_to_le_connection_map_[handle]->InitiateDisconnect(
            hci::DisconnectReason::REMOTE_USER_TERMINATED_CONNECTION);
    log::info("Disconnected ACL after connection canceled");
    BTM_LogHistory(kBtmLogTag, ToLegacyAddressWithType(address_with_type), "Connection canceled",
                   "Le");
    return;
  }

  pimpl_->handle_to_le_connection_map_[handle]->ReadRemoteControllerInformation();

  tBLE_BD_ADDR legacy_address_with_type = ToLegacyAddressWithType(address_with_type);

  TRY_POSTING_ON_MAIN(acl_interface_.connection.le.on_connected, legacy_address_with_type, handle,
                      ToLegacyRole(connection_role), conn_interval, conn_latency, conn_timeout,
                      local_rpa, peer_rpa, peer_addr_type, can_read_discoverable_characteristics);

  log::debug("Connection successful le remote:{} handle:{} initiator:{}", address_with_type, handle,
             (locally_initiated) ? "local" : "remote");
  bluetooth::metrics::LogLeAclCompletionEvent(address_with_type.GetAddress(),
                                              hci::ErrorCode::SUCCESS, locally_initiated);

  BTM_LogHistory(kBtmLogTag, ToLegacyAddressWithType(address_with_type), "Connection successful",
                 "Le");
}

void shim::Acl::OnLeConnectFail(hci::AddressWithType address_with_type, hci::ErrorCode reason) {
  tBLE_BD_ADDR legacy_address_with_type = ToLegacyAddressWithType(address_with_type);

  uint16_t handle = 0;  /* TODO Unneeded */
  bool enhanced = true; /* TODO logging metrics only */
  tHCI_STATUS status = ToLegacyHciErrorCode(reason);

  TRY_POSTING_ON_MAIN(acl_interface_.connection.le.on_failed, legacy_address_with_type, handle,
                      enhanced, status);

  bluetooth::metrics::LogLeAclCompletionEvent(address_with_type.GetAddress(), reason, true);
  log::warn("Connection failed le remote:{}", address_with_type);
  BTM_LogHistory(kBtmLogTag, ToLegacyAddressWithType(address_with_type), "Connection failed",
                 std::format("le reason:{}", hci::ErrorCodeText(reason)));
}

void shim::Acl::DisconnectClassic(uint16_t handle, tHCI_STATUS reason, std::string comment) {
  handler_->CallOn(pimpl_.get(), &Acl::impl::disconnect_classic, handle, reason, comment);
}

void shim::Acl::DisconnectLe(uint16_t handle, tHCI_STATUS reason, std::string comment) {
  handler_->CallOn(pimpl_.get(), &Acl::impl::disconnect_le, handle, reason, comment);
}

void shim::Acl::UpdateConnectionParameters(uint16_t handle, uint16_t conn_int_min,
                                           uint16_t conn_int_max, uint16_t conn_latency,
                                           uint16_t conn_timeout, uint16_t min_ce_len,
                                           uint16_t max_ce_len) {
  handler_->CallOn(pimpl_.get(), &Acl::impl::update_connection_parameters, handle, conn_int_min,
                   conn_int_max, conn_latency, conn_timeout, min_ce_len, max_ce_len);
}

void shim::Acl::LeSubrateRequest(uint16_t hci_handle, uint16_t subrate_min, uint16_t subrate_max,
                                 uint16_t max_latency, uint16_t cont_num, uint16_t sup_tout) {
  handler_->CallOn(pimpl_.get(), &Acl::impl::LeSubrateRequest, hci_handle, subrate_min, subrate_max,
                   max_latency, cont_num, sup_tout);
}

void shim::Acl::DumpConnectionHistory(int fd) const { pimpl_->DumpConnectionHistory(fd); }

void shim::Acl::DisconnectAllForSuspend() {
  if (CheckForOrphanedAclConnections()) {
    std::promise<void> disconnect_promise;
    auto disconnect_future = disconnect_promise.get_future();
    handler_->CallOn(pimpl_.get(), &Acl::impl::DisconnectClassicConnections,
                     std::move(disconnect_promise));
    disconnect_future.wait();

    disconnect_promise = std::promise<void>();

    disconnect_future = disconnect_promise.get_future();
    handler_->CallOn(pimpl_.get(), &Acl::impl::DisconnectLeConnections,
                     std::move(disconnect_promise));
    disconnect_future.wait();
    log::warn("Disconnected open ACL connections");
  }
}

void shim::Acl::Shutdown() {
  if (CheckForOrphanedAclConnections()) {
    std::promise<void> shutdown_promise;
    auto shutdown_future = shutdown_promise.get_future();
    handler_->CallOn(pimpl_.get(), &Acl::impl::ShutdownClassicConnections,
                     std::move(shutdown_promise));
    shutdown_future.wait();

    shutdown_promise = std::promise<void>();

    shutdown_future = shutdown_promise.get_future();
    handler_->CallOn(pimpl_.get(), &Acl::impl::ShutdownLeConnections, std::move(shutdown_promise));
    shutdown_future.wait();
    log::warn("Flushed open ACL connections");
  } else {
    log::info("All ACL connections have been previously closed");
  }
}

void shim::Acl::FinalShutdown() {
  std::promise<void> promise;
  auto future = promise.get_future();
  GetAclManager()->UnregisterCallbacks(this, std::move(promise));
  future.wait();
  log::debug("Unregistered classic callbacks from gd acl manager");

  promise = std::promise<void>();
  future = promise.get_future();
  GetAclManager()->UnregisterLeCallbacks(this, std::move(promise));
  future.wait();
  log::debug("Unregistered le callbacks from gd acl manager");

  promise = std::promise<void>();
  future = promise.get_future();
  handler_->CallOn(pimpl_.get(), &Acl::impl::FinalShutdown, std::move(promise));
  future.wait();
  log::info("Unregistered and cleared any orphaned ACL connections");
}

void shim::Acl::ClearFilterAcceptList() {
  handler_->CallOn(pimpl_.get(), &Acl::impl::clear_acceptlist);
}

void shim::Acl::AddToAddressResolution(const hci::AddressWithType& address_with_type,
                                       const std::array<uint8_t, 16>& peer_irk,
                                       const std::array<uint8_t, 16>& local_irk) {
  handler_->CallOn(pimpl_.get(), &Acl::impl::AddToAddressResolution, address_with_type, peer_irk,
                   local_irk);
}

void shim::Acl::RemoveFromAddressResolution(const hci::AddressWithType& address_with_type) {
  handler_->CallOn(pimpl_.get(), &Acl::impl::RemoveFromAddressResolution, address_with_type);
}

void shim::Acl::ClearAddressResolution() {
  handler_->CallOn(pimpl_.get(), &Acl::impl::ClearResolvingList);
}

void shim::Acl::SetSystemSuspendState(bool suspended) {
  if (com::android::bluetooth::flags::adapter_suspend_mgmt()) {
    pimpl_->system_suspend_ = suspended;
    if (!suspended) {
      pimpl_->wakeup_wakelock_.release();
    }
  }
  handler_->CallOn(pimpl_.get(), &Acl::impl::SetSystemSuspendState, suspended);
}