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