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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.
*/
#define LOG_TAG "bt_gd_neigh"
#include "neighbor/name.h"
#include <memory>
#include <unordered_map>
#include <utility>
#include "common/bind.h"
#include "hci/hci_layer.h"
#include "hci/hci_packets.h"
#include "module.h"
#include "os/handler.h"
#include "os/log.h"
namespace bluetooth {
namespace neighbor {
struct ReadCallbackHandler {
ReadRemoteNameCallback callback;
os::Handler* handler;
};
struct CancelCallbackHandler {
CancelRemoteNameCallback callback;
os::Handler* handler;
};
constexpr RemoteName kEmptyName{};
struct NameModule::impl {
void ReadRemoteNameRequest(
hci::Address address,
hci::PageScanRepetitionMode page_scan_repetition_mode,
uint16_t clock_offset,
hci::ClockOffsetValid clock_offset_valid,
ReadRemoteNameCallback callback,
os::Handler* handler);
void CancelRemoteNameRequest(hci::Address address, CancelRemoteNameCallback, os::Handler* handler);
void Start();
void Stop();
impl(const NameModule& name_module);
private:
const NameModule& module_;
void EnqueueCommandComplete(std::unique_ptr<hci::CommandBuilder> command);
void EnqueueCommandStatus(std::unique_ptr<hci::CommandBuilder> command);
void OnCommandComplete(hci::CommandCompleteView view);
void OnCommandStatus(hci::CommandStatusView status);
void OnEvent(hci::EventView view);
std::unordered_map<hci::Address, std::unique_ptr<ReadCallbackHandler>> read_callback_handler_map_;
std::unordered_map<hci::Address, std::unique_ptr<CancelCallbackHandler>> cancel_callback_handler_map_;
hci::HciLayer* hci_layer_;
os::Handler* handler_;
};
const ModuleFactory neighbor::NameModule::Factory = ModuleFactory([]() { return new neighbor::NameModule(); });
neighbor::NameModule::impl::impl(const neighbor::NameModule& module) : module_(module) {}
void neighbor::NameModule::impl::EnqueueCommandComplete(std::unique_ptr<hci::CommandBuilder> command) {
hci_layer_->EnqueueCommand(std::move(command), handler_->BindOnceOn(this, &impl::OnCommandComplete));
}
void neighbor::NameModule::impl::EnqueueCommandStatus(std::unique_ptr<hci::CommandBuilder> command) {
hci_layer_->EnqueueCommand(std::move(command), handler_->BindOnceOn(this, &impl::OnCommandStatus));
}
void neighbor::NameModule::impl::OnCommandComplete(hci::CommandCompleteView view) {
switch (view.GetCommandOpCode()) {
case hci::OpCode::REMOTE_NAME_REQUEST_CANCEL: {
auto packet = hci::RemoteNameRequestCancelCompleteView::Create(view);
ASSERT(packet.IsValid());
ASSERT(packet.GetStatus() == hci::ErrorCode::SUCCESS);
hci::Address address = packet.GetBdAddr();
ASSERT(cancel_callback_handler_map_.find(address) != cancel_callback_handler_map_.end());
cancel_callback_handler_map_.erase(address);
} break;
default:
LOG_WARN("Unhandled command:%s", hci::OpCodeText(view.GetCommandOpCode()).c_str());
break;
}
}
void neighbor::NameModule::impl::OnCommandStatus(hci::CommandStatusView status) {
ASSERT(status.GetStatus() == hci::ErrorCode::SUCCESS);
switch (status.GetCommandOpCode()) {
case hci::OpCode::REMOTE_NAME_REQUEST: {
auto packet = hci::RemoteNameRequestStatusView::Create(status);
ASSERT(packet.IsValid());
} break;
default:
LOG_WARN("Unhandled command:%s", hci::OpCodeText(status.GetCommandOpCode()).c_str());
break;
}
}
void neighbor::NameModule::impl::OnEvent(hci::EventView view) {
switch (view.GetEventCode()) {
case hci::EventCode::REMOTE_NAME_REQUEST_COMPLETE: {
auto packet = hci::RemoteNameRequestCompleteView::Create(view);
ASSERT(packet.IsValid());
hci::Address address = packet.GetBdAddr();
ASSERT(read_callback_handler_map_.find(address) != read_callback_handler_map_.end());
auto read_callback_handler = std::move(read_callback_handler_map_[address]);
read_callback_handler->handler->Post(common::BindOnce(
std::move(read_callback_handler->callback), packet.GetStatus(), address, packet.GetRemoteName()));
read_callback_handler_map_.erase(address);
} break;
default:
LOG_ERROR("Unhandled event:%s", hci::EventCodeText(view.GetEventCode()).c_str());
break;
}
}
void neighbor::NameModule::impl::Start() {
hci_layer_ = module_.GetDependency<hci::HciLayer>();
handler_ = module_.GetHandler();
hci_layer_->RegisterEventHandler(
hci::EventCode::REMOTE_NAME_REQUEST_COMPLETE, handler_->BindOn(this, &NameModule::impl::OnEvent));
}
void neighbor::NameModule::impl::Stop() {
hci_layer_->UnregisterEventHandler(hci::EventCode::REMOTE_NAME_REQUEST_COMPLETE);
}
void neighbor::NameModule::impl::ReadRemoteNameRequest(
hci::Address address,
hci::PageScanRepetitionMode page_scan_repetition_mode,
uint16_t clock_offset,
hci::ClockOffsetValid clock_offset_valid,
ReadRemoteNameCallback callback,
os::Handler* handler) {
LOG_INFO("%s Start read remote name request for %s", __func__, address.ToString().c_str());
if (read_callback_handler_map_.find(address) != read_callback_handler_map_.end()) {
LOG_WARN("Ignoring duplicate read remote name request to:%s", address.ToString().c_str());
handler->Post(common::BindOnce(std::move(callback), hci::ErrorCode::UNSPECIFIED_ERROR, address, kEmptyName));
return;
}
read_callback_handler_map_[address] = std::unique_ptr<ReadCallbackHandler>(new ReadCallbackHandler{
.callback = std::move(callback),
.handler = handler,
});
EnqueueCommandStatus(
hci::RemoteNameRequestBuilder::Create(address, page_scan_repetition_mode, clock_offset, clock_offset_valid));
}
void neighbor::NameModule::impl::CancelRemoteNameRequest(
hci::Address address, CancelRemoteNameCallback callback, os::Handler* handler) {
LOG_INFO("%s Cancel remote name request for %s", __func__, address.ToString().c_str());
if (cancel_callback_handler_map_.find(address) != cancel_callback_handler_map_.end()) {
LOG_WARN("Ignoring duplicate cancel remote name request to:%s", address.ToString().c_str());
handler->Post(common::BindOnce(std::move(callback), hci::ErrorCode::UNSPECIFIED_ERROR, address));
return;
}
cancel_callback_handler_map_[address] = std::unique_ptr<CancelCallbackHandler>(new CancelCallbackHandler{
.callback = std::move(callback),
.handler = handler,
});
EnqueueCommandComplete(hci::RemoteNameRequestCancelBuilder::Create(address));
}
/**
* General API here
*/
neighbor::NameModule::NameModule() : pimpl_(std::make_unique<impl>(*this)) {}
neighbor::NameModule::~NameModule() {
pimpl_.reset();
}
void neighbor::NameModule::ReadRemoteNameRequest(
hci::Address address,
hci::PageScanRepetitionMode page_scan_repetition_mode,
uint16_t clock_offset,
hci::ClockOffsetValid clock_offset_valid,
ReadRemoteNameCallback callback,
os::Handler* handler) {
ASSERT(callback);
ASSERT(handler != nullptr);
GetHandler()->Post(common::BindOnce(
&NameModule::impl::ReadRemoteNameRequest,
common::Unretained(pimpl_.get()),
address,
page_scan_repetition_mode,
clock_offset,
clock_offset_valid,
std::move(callback),
handler));
}
void neighbor::NameModule::CancelRemoteNameRequest(
hci::Address address, CancelRemoteNameCallback callback, os::Handler* handler) {
ASSERT(callback);
ASSERT(handler != nullptr);
GetHandler()->Post(common::BindOnce(
&NameModule::impl::CancelRemoteNameRequest,
common::Unretained(pimpl_.get()),
address,
std::move(callback),
handler));
}
/**
* Module methods here
*/
void neighbor::NameModule::ListDependencies(ModuleList* list) const {
list->add<hci::HciLayer>();
}
void neighbor::NameModule::Start() {
pimpl_->Start();
}
void neighbor::NameModule::Stop() {
pimpl_->Stop();
}
} // namespace neighbor
} // namespace bluetooth
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