| // Copyright 2015 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 "buffet/peerd_client.h" |
| |
| #include <map> |
| #include <vector> |
| |
| #include <base/message_loop/message_loop.h> |
| #include <brillo/errors/error.h> |
| #include <brillo/strings/string_utils.h> |
| |
| using org::chromium::peerd::PeerProxy; |
| |
| namespace buffet { |
| |
| namespace { |
| |
| // Commit changes only if no update request happened during the timeout. |
| // Usually updates happen in batches, so we don't want to flood network with |
| // updates relevant for a short amount of time. |
| const int kCommitTimeoutSeconds = 1; |
| |
| void OnError(const std::string& operation, brillo::Error* error) { |
| LOG(ERROR) << operation << " failed:" << error->GetMessage(); |
| } |
| |
| const char kExpectedServiceType[] = "_privet._tcp"; |
| const char kServiceName[] = "privet"; |
| |
| } // namespace |
| |
| PeerdClient::PeerdClient(const scoped_refptr<dbus::Bus>& bus) |
| : peerd_object_manager_proxy_{bus} { |
| peerd_object_manager_proxy_.SetManagerAddedCallback( |
| base::Bind(&PeerdClient::OnPeerdOnline, weak_ptr_factory_.GetWeakPtr())); |
| peerd_object_manager_proxy_.SetManagerRemovedCallback( |
| base::Bind(&PeerdClient::OnPeerdOffline, weak_ptr_factory_.GetWeakPtr())); |
| } |
| |
| PeerdClient::~PeerdClient() { |
| RemoveService(); |
| } |
| |
| void PeerdClient::PublishService(const std::string& service_type, |
| uint16_t port, |
| const std::vector<std::string>& txt) { |
| // Only one service supported. |
| CHECK_EQ(service_type, kExpectedServiceType); |
| port_ = port; |
| txt_ = txt; |
| Update(); |
| } |
| |
| void PeerdClient::StopPublishing(const std::string& service_type) { |
| // Only one service supported. |
| CHECK_EQ(service_type, kExpectedServiceType); |
| port_ = 0; |
| Update(); |
| } |
| |
| void PeerdClient::Update() { |
| // Abort pending updates, and wait for more changes. |
| restart_weak_ptr_factory_.InvalidateWeakPtrs(); |
| base::MessageLoop::current()->PostDelayedTask( |
| FROM_HERE, base::Bind(&PeerdClient::UpdateImpl, |
| restart_weak_ptr_factory_.GetWeakPtr()), |
| base::TimeDelta::FromSeconds(kCommitTimeoutSeconds)); |
| } |
| |
| void PeerdClient::OnPeerdOnline( |
| org::chromium::peerd::ManagerProxy* manager_proxy) { |
| peerd_manager_proxy_ = manager_proxy; |
| VLOG(1) << "Peerd manager is online at '" |
| << manager_proxy->GetObjectPath().value() << "'."; |
| Update(); |
| } |
| |
| void PeerdClient::OnPeerdOffline(const dbus::ObjectPath& object_path) { |
| peerd_manager_proxy_ = nullptr; |
| VLOG(1) << "Peerd manager is now offline."; |
| } |
| |
| void PeerdClient::ExposeService() { |
| // Do nothing if peerd hasn't started yet. |
| if (peerd_manager_proxy_ == nullptr) |
| return; |
| VLOG(1) << "Starting peerd advertising."; |
| CHECK_NE(port_, 0); |
| CHECK(!txt_.empty()); |
| std::map<std::string, brillo::Any> mdns_options{ |
| {"port", brillo::Any{port_}}, |
| }; |
| |
| std::map<std::string, std::string> txt; |
| for (const auto& record : txt_) { |
| auto name_value = brillo::string_utils::SplitAtFirst(record, "="); |
| CHECK(!name_value.second.empty()); |
| txt.emplace(std::move(name_value)); |
| } |
| |
| published_ = true; |
| peerd_manager_proxy_->ExposeServiceAsync( |
| kServiceName, txt, {{"mdns", mdns_options}}, base::Closure(), |
| base::Bind(&OnError, "ExposeService")); |
| } |
| |
| void PeerdClient::RemoveService() { |
| if (peerd_manager_proxy_ == nullptr) |
| return; |
| |
| VLOG(1) << "Stopping peerd advertising."; |
| if (published_) { |
| published_ = false; |
| peerd_manager_proxy_->RemoveExposedServiceAsync( |
| kServiceName, base::Closure(), base::Bind(&OnError, "RemoveService")); |
| } |
| } |
| |
| void PeerdClient::UpdateImpl() { |
| if (port_ == 0) |
| return RemoveService(); |
| ExposeService(); |
| } |
| |
| } // namespace buffet |