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> |
Alex Vakulenko | 4170585 | 2015-10-13 10:12:06 -0700 | [diff] [blame^] | 11 | #include <brillo/errors/error.h> |
| 12 | #include <brillo/strings/string_utils.h> |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 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 | |
Alex Vakulenko | 4170585 | 2015-10-13 10:12:06 -0700 | [diff] [blame^] | 25 | void OnError(const std::string& operation, brillo::Error* error) { |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 26 | LOG(ERROR) << operation << " failed:" << error->GetMessage(); |
| 27 | } |
| 28 | |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame] | 29 | const char kExpectedServiceType[] = "_privet._tcp"; |
| 30 | const char kServiceName[] = "privet"; |
| 31 | |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 32 | } // namespace |
| 33 | |
| 34 | PeerdClient::PeerdClient(const scoped_refptr<dbus::Bus>& bus) |
| 35 | : peerd_object_manager_proxy_{bus} { |
| 36 | peerd_object_manager_proxy_.SetManagerAddedCallback( |
| 37 | base::Bind(&PeerdClient::OnPeerdOnline, weak_ptr_factory_.GetWeakPtr())); |
| 38 | peerd_object_manager_proxy_.SetManagerRemovedCallback( |
| 39 | base::Bind(&PeerdClient::OnPeerdOffline, weak_ptr_factory_.GetWeakPtr())); |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 40 | } |
| 41 | |
| 42 | PeerdClient::~PeerdClient() { |
| 43 | RemoveService(); |
| 44 | } |
| 45 | |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame] | 46 | void PeerdClient::PublishService(const std::string& service_type, |
| 47 | uint16_t port, |
| 48 | const std::vector<std::string>& txt) { |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 49 | // Only one service supported. |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame] | 50 | CHECK_EQ(service_type, kExpectedServiceType); |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 51 | port_ = port; |
| 52 | txt_ = txt; |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 53 | Update(); |
| 54 | } |
| 55 | |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame] | 56 | void PeerdClient::StopPublishing(const std::string& service_type) { |
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_ = 0; |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 60 | Update(); |
| 61 | } |
| 62 | |
| 63 | void PeerdClient::Update() { |
| 64 | // Abort pending updates, and wait for more changes. |
| 65 | restart_weak_ptr_factory_.InvalidateWeakPtrs(); |
| 66 | base::MessageLoop::current()->PostDelayedTask( |
| 67 | FROM_HERE, base::Bind(&PeerdClient::UpdateImpl, |
| 68 | restart_weak_ptr_factory_.GetWeakPtr()), |
| 69 | base::TimeDelta::FromSeconds(kCommitTimeoutSeconds)); |
| 70 | } |
| 71 | |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 72 | void PeerdClient::OnPeerdOnline( |
| 73 | org::chromium::peerd::ManagerProxy* manager_proxy) { |
| 74 | peerd_manager_proxy_ = manager_proxy; |
| 75 | VLOG(1) << "Peerd manager is online at '" |
| 76 | << manager_proxy->GetObjectPath().value() << "'."; |
| 77 | Update(); |
| 78 | } |
| 79 | |
| 80 | void PeerdClient::OnPeerdOffline(const dbus::ObjectPath& object_path) { |
| 81 | peerd_manager_proxy_ = nullptr; |
| 82 | VLOG(1) << "Peerd manager is now offline."; |
| 83 | } |
| 84 | |
| 85 | void PeerdClient::ExposeService() { |
| 86 | // Do nothing if peerd hasn't started yet. |
| 87 | if (peerd_manager_proxy_ == nullptr) |
| 88 | return; |
| 89 | VLOG(1) << "Starting peerd advertising."; |
| 90 | CHECK_NE(port_, 0); |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 91 | CHECK(!txt_.empty()); |
Alex Vakulenko | 4170585 | 2015-10-13 10:12:06 -0700 | [diff] [blame^] | 92 | std::map<std::string, brillo::Any> mdns_options{ |
| 93 | {"port", brillo::Any{port_}}, |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 94 | }; |
| 95 | |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame] | 96 | std::map<std::string, std::string> txt; |
| 97 | for (const auto& record : txt_) { |
Alex Vakulenko | 4170585 | 2015-10-13 10:12:06 -0700 | [diff] [blame^] | 98 | auto name_value = brillo::string_utils::SplitAtFirst(record, "="); |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame] | 99 | CHECK(!name_value.second.empty()); |
| 100 | txt.emplace(std::move(name_value)); |
| 101 | } |
| 102 | |
| 103 | published_ = true; |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 104 | peerd_manager_proxy_->ExposeServiceAsync( |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame] | 105 | kServiceName, txt, {{"mdns", mdns_options}}, base::Closure(), |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 106 | base::Bind(&OnError, "ExposeService")); |
| 107 | } |
| 108 | |
| 109 | void PeerdClient::RemoveService() { |
| 110 | if (peerd_manager_proxy_ == nullptr) |
| 111 | return; |
| 112 | |
| 113 | VLOG(1) << "Stopping peerd advertising."; |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame] | 114 | if (published_) { |
| 115 | published_ = false; |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 116 | peerd_manager_proxy_->RemoveExposedServiceAsync( |
Alex Vakulenko | e32375b | 2015-09-28 08:55:40 -0700 | [diff] [blame] | 117 | kServiceName, base::Closure(), base::Bind(&OnError, "RemoveService")); |
Vitaly Buka | 7042c58 | 2015-07-30 17:02:14 -0700 | [diff] [blame] | 118 | } |
| 119 | } |
| 120 | |
| 121 | void PeerdClient::UpdateImpl() { |
| 122 | if (port_ == 0) |
| 123 | return RemoveService(); |
| 124 | ExposeService(); |
| 125 | } |
| 126 | |
| 127 | } // namespace buffet |