net/dns/dns_config_service_posix.h

   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 #ifndef NET_DNS_DNS_CONFIG_SERVICE_POSIX_H_
   6 #define NET_DNS_DNS_CONFIG_SERVICE_POSIX_H_
   7
   8 #if !defined(OS_ANDROID)
   9 #include <sys/types.h>
  10 #include <netinet/in.h>
  11 #include <resolv.h>
  12 #endif
  13
  14 #include "base/compiler_specific.h"
  15 #include "net/base/net_export.h"
  16 #include "net/dns/dns_config_service.h"
  17
  18 namespace net {
  19
  20 // Use DnsConfigService::CreateSystemService to use it outside of tests.
  21 namespace internal {
  22
  23 class NET_EXPORT_PRIVATE DnsConfigServicePosix : public DnsConfigService {
  24  public:
  25   DnsConfigServicePosix();
  26   ~DnsConfigServicePosix() override;
  27
  28  protected:
  29   // DnsConfigService:
  30   void ReadNow() override;
  31   bool StartWatching() override;
  32
  33  private:
  34   class Watcher;
  35   class ConfigReader;
  36   class HostsReader;
  37
  38   void OnConfigChanged(bool succeeded);
  39   void OnHostsChanged(bool succeeded);
  40
  41   scoped_ptr<Watcher> watcher_;
  42   scoped_refptr<ConfigReader> config_reader_;
  43   scoped_refptr<HostsReader> hosts_reader_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(DnsConfigServicePosix);
  46 };
  47
  48 enum ConfigParsePosixResult {
  49   CONFIG_PARSE_POSIX_OK = 0,
  50   CONFIG_PARSE_POSIX_RES_INIT_FAILED,
  51   CONFIG_PARSE_POSIX_RES_INIT_UNSET,
  52   CONFIG_PARSE_POSIX_BAD_ADDRESS,
  53   CONFIG_PARSE_POSIX_BAD_EXT_STRUCT,
  54   CONFIG_PARSE_POSIX_NULL_ADDRESS,
  55   CONFIG_PARSE_POSIX_NO_NAMESERVERS,
  56   CONFIG_PARSE_POSIX_MISSING_OPTIONS,
  57   CONFIG_PARSE_POSIX_UNHANDLED_OPTIONS,
  58   CONFIG_PARSE_POSIX_NO_DNSINFO,
  59   CONFIG_PARSE_POSIX_MAX  // Bounding values for enumeration.
  60 };
  61
  62 #if !defined(OS_ANDROID)
  63 // Fills in |dns_config| from |res|.
  64 ConfigParsePosixResult NET_EXPORT_PRIVATE ConvertResStateToDnsConfig(
  65     const struct __res_state& res, DnsConfig* dns_config);
  66 #endif
  67
  68 }  // namespace internal
  69
  70 }  // namespace net
  71
  72 #endif  // NET_DNS_DNS_CONFIG_SERVICE_POSIX_H_