Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 1 | // Copyright 2014 The Chromium OS Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "buffet/peerd_client.h" |
| 6 | |
| 7 | #include <map> |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame^] | 8 | #include <vector> |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 9 | |
| 10 | #include <base/message_loop/message_loop.h> |
| 11 | #include <chromeos/errors/error.h> |
| 12 | #include <chromeos/strings/string_utils.h> |
| 13 | |
| 14 | using org::chromium::peerd::PeerProxy; |
| 15 | |
| 16 | namespace buffet { |
| 17 | |
| 18 | namespace { |
| 19 | |
| 20 | // Commit changes only if no update request happened during the timeout. |
| 21 | // Usually updates happen in batches, so we don't want to flood network with |
| 22 | // updates relevant for a short amount of time. |
| 23 | const int kCommitTimeoutSeconds = 1; |
| 24 | |
| 25 | const char kSelfPath[] = "/org/chromium/peerd/Self"; |
| 26 | |
| 27 | void OnError(const std::string& operation, chromeos::Error* error) { |
| 28 | LOG(ERROR) << operation << " failed:" << error->GetMessage(); |
| 29 | } |
| 30 | |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame^] | 31 | const char kExpectedServiceType[] = "_privet._tcp"; |
| 32 | const char kServiceName[] = "privet"; |
| 33 | |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 34 | } // namespace |
| 35 | |
| 36 | PeerdClient::PeerdClient(const scoped_refptr<dbus::Bus>& bus) |
| 37 | : peerd_object_manager_proxy_{bus} { |
| 38 | peerd_object_manager_proxy_.SetManagerAddedCallback( |
| 39 | base::Bind(&PeerdClient::OnPeerdOnline, weak_ptr_factory_.GetWeakPtr())); |
| 40 | peerd_object_manager_proxy_.SetManagerRemovedCallback( |
| 41 | base::Bind(&PeerdClient::OnPeerdOffline, weak_ptr_factory_.GetWeakPtr())); |
| 42 | peerd_object_manager_proxy_.SetPeerAddedCallback( |
| 43 | base::Bind(&PeerdClient::OnNewPeer, weak_ptr_factory_.GetWeakPtr())); |
| 44 | } |
| 45 | |
| 46 | PeerdClient::~PeerdClient() { |
| 47 | RemoveService(); |
| 48 | } |
| 49 | |
| 50 | std::string PeerdClient::GetId() const { |
| 51 | return device_id_; |
| 52 | } |
| 53 | |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame^] | 54 | void PeerdClient::PublishService(const std::string& service_type, |
| 55 | uint16_t port, |
| 56 | const std::vector<std::string>& txt) { |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 57 | // Only one service supported. |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame^] | 58 | CHECK_EQ(service_type, kExpectedServiceType); |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 59 | port_ = port; |
| 60 | txt_ = txt; |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 61 | Update(); |
| 62 | } |
| 63 | |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame^] | 64 | void PeerdClient::StopPublishing(const std::string& service_type) { |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 65 | // Only one service supported. |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame^] | 66 | CHECK_EQ(service_type, kExpectedServiceType); |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 67 | port_ = 0; |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 68 | Update(); |
| 69 | } |
| 70 | |
| 71 | void PeerdClient::Update() { |
| 72 | // Abort pending updates, and wait for more changes. |
| 73 | restart_weak_ptr_factory_.InvalidateWeakPtrs(); |
| 74 | base::MessageLoop::current()->PostDelayedTask( |
| 75 | FROM_HERE, base::Bind(&PeerdClient::UpdateImpl, |
| 76 | restart_weak_ptr_factory_.GetWeakPtr()), |
| 77 | base::TimeDelta::FromSeconds(kCommitTimeoutSeconds)); |
| 78 | } |
| 79 | |
| 80 | void PeerdClient::OnNewPeer(PeerProxy* peer) { |
| 81 | if (!peer || peer->GetObjectPath().value() != kSelfPath) |
| 82 | return; |
| 83 | peer->SetPropertyChangedCallback(base::Bind( |
| 84 | &PeerdClient::OnPeerPropertyChanged, weak_ptr_factory_.GetWeakPtr())); |
| 85 | OnPeerPropertyChanged(peer, PeerProxy::UUIDName()); |
| 86 | } |
| 87 | |
| 88 | void PeerdClient::OnPeerPropertyChanged(PeerProxy* peer, |
| 89 | const std::string& property_name) { |
| 90 | if (property_name != PeerProxy::UUIDName() || |
| 91 | peer->GetObjectPath().value() != kSelfPath) |
| 92 | return; |
| 93 | const std::string new_id{peer->uuid()}; |
| 94 | if (new_id != device_id_) { |
| 95 | device_id_ = new_id; |
| 96 | Update(); |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | void PeerdClient::OnPeerdOnline( |
| 101 | org::chromium::peerd::ManagerProxy* manager_proxy) { |
| 102 | peerd_manager_proxy_ = manager_proxy; |
| 103 | VLOG(1) << "Peerd manager is online at '" |
| 104 | << manager_proxy->GetObjectPath().value() << "'."; |
| 105 | Update(); |
| 106 | } |
| 107 | |
| 108 | void PeerdClient::OnPeerdOffline(const dbus::ObjectPath& object_path) { |
| 109 | peerd_manager_proxy_ = nullptr; |
| 110 | VLOG(1) << "Peerd manager is now offline."; |
| 111 | } |
| 112 | |
| 113 | void PeerdClient::ExposeService() { |
| 114 | // Do nothing if peerd hasn't started yet. |
| 115 | if (peerd_manager_proxy_ == nullptr) |
| 116 | return; |
| 117 | VLOG(1) << "Starting peerd advertising."; |
| 118 | CHECK_NE(port_, 0); |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 119 | CHECK(!txt_.empty()); |
| 120 | std::map<std::string, chromeos::Any> mdns_options{ |
| 121 | {"port", chromeos::Any{port_}}, |
| 122 | }; |
| 123 | |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame^] | 124 | std::map<std::string, std::string> txt; |
| 125 | for (const auto& record : txt_) { |
| 126 | auto name_value = chromeos::string_utils::SplitAtFirst(record, "="); |
| 127 | CHECK(!name_value.second.empty()); |
| 128 | txt.emplace(std::move(name_value)); |
| 129 | } |
| 130 | |
| 131 | published_ = true; |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 132 | peerd_manager_proxy_->ExposeServiceAsync( |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame^] | 133 | kServiceName, txt, {{"mdns", mdns_options}}, base::Closure(), |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 134 | base::Bind(&OnError, "ExposeService")); |
| 135 | } |
| 136 | |
| 137 | void PeerdClient::RemoveService() { |
| 138 | if (peerd_manager_proxy_ == nullptr) |
| 139 | return; |
| 140 | |
| 141 | VLOG(1) << "Stopping peerd advertising."; |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame^] | 142 | if (published_) { |
| 143 | published_ = false; |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 144 | peerd_manager_proxy_->RemoveExposedServiceAsync( |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame^] | 145 | kServiceName, base::Closure(), base::Bind(&OnError, "RemoveService")); |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 146 | } |
| 147 | } |
| 148 | |
| 149 | void PeerdClient::UpdateImpl() { |
| 150 | if (port_ == 0) |
| 151 | return RemoveService(); |
| 152 | ExposeService(); |
| 153 | } |
| 154 | |
| 155 | } // namespace buffet |