| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef NET_DNS_DNS_CONFIG_SERVICE_POSIX_H_ |
| #define NET_DNS_DNS_CONFIG_SERVICE_POSIX_H_ |
| |
| #if !defined(OS_ANDROID) |
| #include <sys/types.h> |
| #include <netinet/in.h> |
| #include <resolv.h> |
| #endif |
| |
| #include "base/compiler_specific.h" |
| #include "base/files/file_path.h" |
| #include "base/macros.h" |
| #include "net/base/net_export.h" |
| #include "net/base/network_change_notifier.h" |
| #include "net/dns/dns_config_service.h" |
| |
| namespace base { |
| class Time; |
| } // namespace base |
| |
| namespace net { |
| |
| // Use DnsConfigService::CreateSystemService to use it outside of tests. |
| namespace internal { |
| |
| // Note: On Android NetworkChangeNotifier::OnNetworkChanged() signals must be |
| // passed in via calls to OnNetworkChanged(). |
| class NET_EXPORT_PRIVATE DnsConfigServicePosix : public DnsConfigService { |
| public: |
| DnsConfigServicePosix(); |
| ~DnsConfigServicePosix() override; |
| |
| #if defined(OS_ANDROID) |
| // Returns whether the DnsConfigServicePosix witnessed a DNS configuration |
| // change since |since_time|. Requires that callers have started listening |
| // for NetworkChangeNotifier::OnNetworkChanged() signals, and passing them in |
| // via OnNetworkChanged(), prior to |since_time|. |
| bool SeenChangeSince(const base::Time& since_time) const; |
| // NetworkChangeNotifier::OnNetworkChanged() signals must be passed |
| // in via calls to OnNetworkChanged(). Allowing external sources of |
| // this signal allows users of DnsConfigServicePosix to start watching for |
| // NetworkChangeNotifier::OnNetworkChanged() signals prior to the |
| // DnsConfigServicePosix even being created. |
| void OnNetworkChanged(NetworkChangeNotifier::ConnectionType type); |
| #endif |
| |
| void SetDnsConfigForTesting(const DnsConfig* dns_config); |
| void SetHostsFilePathForTesting(const base::FilePath::CharType* file_path); |
| |
| protected: |
| // DnsConfigService: |
| void ReadNow() override; |
| bool StartWatching() override; |
| |
| private: |
| class Watcher; |
| class ConfigReader; |
| class HostsReader; |
| |
| void OnConfigChanged(bool succeeded); |
| void OnHostsChanged(bool succeeded); |
| |
| std::unique_ptr<Watcher> watcher_; |
| // Allow a mock hosts file for testing purposes. |
| const base::FilePath::CharType* file_path_hosts_; |
| // Allow a mock DNS server for testing purposes. |
| const DnsConfig* dns_config_for_testing_; |
| scoped_refptr<ConfigReader> config_reader_; |
| scoped_refptr<HostsReader> hosts_reader_; |
| #if defined(OS_ANDROID) |
| // Has DnsConfigWatcher detected any config changes yet? |
| bool seen_config_change_; |
| #endif |
| |
| DISALLOW_COPY_AND_ASSIGN(DnsConfigServicePosix); |
| }; |
| |
| enum ConfigParsePosixResult { |
| CONFIG_PARSE_POSIX_OK = 0, |
| CONFIG_PARSE_POSIX_RES_INIT_FAILED, |
| CONFIG_PARSE_POSIX_RES_INIT_UNSET, |
| CONFIG_PARSE_POSIX_BAD_ADDRESS, |
| CONFIG_PARSE_POSIX_BAD_EXT_STRUCT, |
| CONFIG_PARSE_POSIX_NULL_ADDRESS, |
| CONFIG_PARSE_POSIX_NO_NAMESERVERS, |
| CONFIG_PARSE_POSIX_MISSING_OPTIONS, |
| CONFIG_PARSE_POSIX_UNHANDLED_OPTIONS, |
| CONFIG_PARSE_POSIX_NO_DNSINFO, |
| CONFIG_PARSE_POSIX_MAX // Bounding values for enumeration. |
| }; |
| |
| #if !defined(OS_ANDROID) |
| // Fills in |dns_config| from |res|. |
| ConfigParsePosixResult NET_EXPORT_PRIVATE ConvertResStateToDnsConfig( |
| const struct __res_state& res, DnsConfig* dns_config); |
| #endif |
| |
| } // namespace internal |
| |
| } // namespace net |
| |
| #endif // NET_DNS_DNS_CONFIG_SERVICE_POSIX_H_ |