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| 1 // Copyright (c) 2012 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 #include "net/dns/dns_config_watcher.h" | |
| 6 | |
| 7 #include <string> | |
| 8 | |
| 9 #include "base/basictypes.h" | |
| 10 #include "base/bind.h" | |
| 11 #include "base/callback.h" | |
| 12 #include "base/files/file_path_watcher.h" | |
| 13 #include "base/file_path.h" | |
| 14 #include "base/logging.h" | |
| 15 #include "base/memory/scoped_ptr.h" | |
| 16 #include "net/base/network_change_notifier.h" | |
| 17 | |
| 18 #if defined(OS_MACOSX) | |
| 19 #include "net/dns/notify_watcher_mac.h" | |
| 20 #endif | |
| 21 | |
| 22 namespace net { | |
| 23 namespace internal { | |
| 24 | |
| 25 namespace { | |
| 26 | |
| 27 const FilePath::CharType* kFilePathHosts = FILE_PATH_LITERAL("/etc/hosts"); | |
| 28 | |
| 29 #if defined(OS_MACOSX) | |
| 30 // From 10.7.3 configd-395.10/dnsinfo/dnsinfo.h | |
| 31 static const char* kDnsNotifyKey = | |
| 32 "com.apple.system.SystemConfiguration.dns_configuration"; | |
| 33 | |
| 34 class ConfigWatcher { | |
| 35 public: | |
| 36 bool Watch(const base::Callback<void(bool succeeded)>& callback) { | |
| 37 return watcher_.Watch(kDnsNotifyKey, callback); | |
| 38 } | |
| 39 | |
| 40 private: | |
| 41 NotifyWatcherMac watcher_; | |
| 42 }; | |
| 43 #else | |
| 44 | |
| 45 #ifndef _PATH_RESCONF // Normally defined in <resolv.h> | |
| 46 #define _PATH_RESCONF "/etc/resolv.conf" | |
| 47 #endif | |
| 48 | |
| 49 static const FilePath::CharType* kFilePathConfig = | |
| 50 FILE_PATH_LITERAL(_PATH_RESCONF); | |
| 51 | |
| 52 class ConfigWatcher { | |
| 53 public: | |
| 54 typedef base::Callback<void(bool succeeded)> CallbackType; | |
| 55 | |
| 56 bool Watch(const CallbackType& callback) { | |
| 57 callback_ = callback; | |
| 58 return watcher_.Watch(FilePath(kFilePathConfig), | |
| 59 base::Bind(&ConfigWatcher::OnCallback, | |
| 60 base::Unretained(this))); | |
| 61 } | |
| 62 | |
| 63 private: | |
| 64 void OnCallback(const FilePath& path, bool error) { | |
| 65 callback_.Run(!error); | |
| 66 } | |
| 67 | |
| 68 base::files::FilePathWatcher watcher_; | |
| 69 CallbackType callback_; | |
| 70 }; | |
| 71 #endif | |
| 72 | |
| 73 } // namespace | |
| 74 | |
| 75 class DnsConfigWatcher::Core { | |
| 76 public: | |
| 77 Core() {} | |
| 78 ~Core() {} | |
| 79 | |
| 80 bool Watch() { | |
| 81 bool success = true; | |
| 82 if (!config_watcher_.Watch(base::Bind(&Core::OnConfigChanged, | |
| 83 base::Unretained(this)))) { | |
| 84 LOG(ERROR) << "DNS config watch failed to start."; | |
| 85 success = false; | |
| 86 } | |
| 87 if (!hosts_watcher_.Watch(FilePath(kFilePathHosts), | |
| 88 base::Bind(&Core::OnHostsChanged, | |
| 89 base::Unretained(this)))) { | |
| 90 LOG(ERROR) << "DNS hosts watch failed to start."; | |
| 91 success = false; | |
| 92 } | |
| 93 return success; | |
| 94 } | |
| 95 | |
| 96 private: | |
| 97 void OnConfigChanged(bool succeeded) { | |
| 98 if (succeeded) { | |
| 99 NetworkChangeNotifier::NotifyObserversOfDNSChange( | |
| 100 NetworkChangeNotifier::CHANGE_DNS_SETTINGS); | |
| 101 } else { | |
| 102 LOG(ERROR) << "DNS config watch failed."; | |
| 103 NetworkChangeNotifier::NotifyObserversOfDNSChange( | |
| 104 NetworkChangeNotifier::CHANGE_DNS_WATCH_FAILED); | |
| 105 } | |
| 106 } | |
| 107 | |
| 108 void OnHostsChanged(const FilePath& path, bool error) { | |
| 109 if (!error) { | |
| 110 NetworkChangeNotifier::NotifyObserversOfDNSChange( | |
| 111 NetworkChangeNotifier::CHANGE_DNS_HOSTS); | |
| 112 } else { | |
| 113 LOG(ERROR) << "DNS hosts watch failed."; | |
| 114 NetworkChangeNotifier::NotifyObserversOfDNSChange( | |
| 115 NetworkChangeNotifier::CHANGE_DNS_WATCH_FAILED); | |
| 116 } | |
| 117 } | |
| 118 | |
| 119 ConfigWatcher config_watcher_; | |
| 120 base::files::FilePathWatcher hosts_watcher_; | |
| 121 | |
| 122 DISALLOW_COPY_AND_ASSIGN(Core); | |
| 123 }; | |
| 124 | |
| 125 DnsConfigWatcher::DnsConfigWatcher() {} | |
| 126 | |
| 127 DnsConfigWatcher::~DnsConfigWatcher() {} | |
| 128 | |
| 129 void DnsConfigWatcher::Init() { | |
| 130 core_.reset(new Core()); | |
| 131 if (core_->Watch()) { | |
| 132 NetworkChangeNotifier::NotifyObserversOfDNSChange( | |
| 133 NetworkChangeNotifier::CHANGE_DNS_WATCH_STARTED); | |
| 134 } | |
| 135 // TODO(szym): re-start watcher if that makes sense. http://crbug.com/116139 | |
| 136 } | |
| 137 | |
| 138 void DnsConfigWatcher::CleanUp() { | |
| 139 core_.reset(); | |
| 140 } | |
| 141 | |
| 142 } // namespace internal | |
| 143 } // namespace net | |
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Chromium Code Reviews
Issue 10873018:
[net] Move DnsConfigService to NetworkChangeNotifier. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src