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| 1 // Copyright 2013 The Chromium 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 #ifndef CHROME_BROWSER_LOCAL_DISCOVERY_PRIVET_TRAFFIC_DETECTOR_H_ | |
| 6 #define CHROME_BROWSER_LOCAL_DISCOVERY_PRIVET_TRAFFIC_DETECTOR_H_ | |
| 7 | |
| 8 #include "base/callback.h" | |
| 9 #include "base/cancelable_callback.h" | |
| 10 #include "base/macros.h" | |
| 11 #include "content/public/browser/browser_thread.h" | |
| 12 #include "net/base/address_family.h" | |
| 13 #include "net/base/ip_endpoint.h" | |
| 14 #include "net/base/network_change_notifier.h" | |
| 15 | |
| 16 namespace net { | |
| 17 class DatagramServerSocket; | |
| 18 class IOBufferWithSize; | |
| 19 } | |
| 20 | |
| 21 namespace local_discovery { | |
| 22 | |
| 23 // Detects mDns traffic that looks like "Privet" protocol. | |
| 24 // Can produce false positives results, but main task of the class is to avoid | |
| 25 // running full mDns listener if user doesn't have devices. | |
| 26 // When traffic is detected, class fires callback and shutdowns itself. | |
| 27 class PrivetTrafficDetector | |
| 28 : public base::RefCountedThreadSafe< | |
| 29 PrivetTrafficDetector, content::BrowserThread::DeleteOnIOThread>, | |
| 30 private net::NetworkChangeNotifier::NetworkChangeObserver { | |
| 31 public: | |
| 32 PrivetTrafficDetector(net::AddressFamily address_family, | |
| 33 const base::Closure& on_traffic_detected); | |
| 34 | |
| 35 void Start(); | |
| 36 | |
| 37 private: | |
| 38 friend struct content::BrowserThread::DeleteOnThread< | |
| 39 content::BrowserThread::IO>; | |
| 40 friend class base::DeleteHelper<PrivetTrafficDetector>; | |
| 41 ~PrivetTrafficDetector() override; | |
| 42 | |
| 43 // net::NetworkChangeNotifier::NetworkChangeObserver implementation. | |
| 44 void OnNetworkChanged( | |
| 45 net::NetworkChangeNotifier::ConnectionType type) override; | |
| 46 | |
| 47 void StartOnIOThread(); | |
| 48 void ScheduleRestart(); | |
| 49 void Restart(const net::NetworkInterfaceList& networks); | |
| 50 int Bind(); | |
| 51 bool IsSourceAcceptable() const; | |
| 52 bool IsPrivetPacket(int rv) const; | |
| 53 int DoLoop(int rv); | |
| 54 | |
| 55 base::Closure on_traffic_detected_; | |
| 56 scoped_refptr<base::TaskRunner> callback_runner_; | |
| 57 net::NetworkInterfaceList networks_; | |
| 58 net::AddressFamily address_family_; | |
| 59 net::IPEndPoint recv_addr_; | |
| 60 scoped_ptr<net::DatagramServerSocket> socket_; | |
| 61 scoped_refptr<net::IOBufferWithSize> io_buffer_; | |
| 62 base::Time start_time_; | |
| 63 int restart_attempts_; | |
| 64 | |
| 65 base::WeakPtrFactory<PrivetTrafficDetector> weak_ptr_factory_; | |
| 66 | |
| 67 DISALLOW_COPY_AND_ASSIGN(PrivetTrafficDetector); | |
| 68 }; | |
| 69 | |
| 70 } // namespace local_discovery | |
| 71 | |
| 72 #endif // CHROME_BROWSER_LOCAL_DISCOVERY_PRIVET_TRAFFIC_DETECTOR_H_ | |
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