chrome/browser/chromeos/proxy_config_service_impl.cc

   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 "chrome/browser/chromeos/proxy_config_service_impl.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/callback.h"
  10 #include "base/location.h"
  11 #include "base/logging.h"
  12 #include "base/prefs/pref_service.h"
  13 #include "base/values.h"
  14 #include "chrome/browser/browser_process.h"
  15 #include "chrome/browser/chromeos/net/proxy_config_handler.h"
  16 #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
  17 #include "chrome/browser/prefs/proxy_config_dictionary.h"
  18 #include "chrome/browser/prefs/proxy_prefs.h"
  19 #include "chrome/common/pref_names.h"
  20 #include "chromeos/network/network_profile.h"
  21 #include "chromeos/network/network_profile_handler.h"
  22 #include "chromeos/network/network_state.h"
  23 #include "chromeos/network/network_state_handler.h"
  24 #include "chromeos/network/onc/onc_utils.h"
  25 #include "components/policy/core/common/cloud/cloud_policy_constants.h"
  26 #include "components/user_manager/user_manager.h"
  27
  28 namespace chromeos {
  29
  30 namespace {
  31
  32 // Writes the proxy config of |network| to |proxy_config|.  Set |onc_source| to
  33 // the source of this configuration. Returns false if no
  34 // proxy was configured for this network.
  35 bool GetProxyConfig(const PrefService* profile_prefs,
  36                     const PrefService* local_state_prefs,
  37                     const NetworkState& network,
  38                     net::ProxyConfig* proxy_config,
  39                     ::onc::ONCSource* onc_source) {
  40   scoped_ptr<ProxyConfigDictionary> proxy_dict =
  41       proxy_config::GetProxyConfigForNetwork(
  42           profile_prefs, local_state_prefs, network, onc_source);
  43   if (!proxy_dict)
  44     return false;
  45   return PrefProxyConfigTrackerImpl::PrefConfigToNetConfig(*proxy_dict,
  46                                                            proxy_config);
  47 }
  48
  49 }  // namespace
  50
  51 ProxyConfigServiceImpl::ProxyConfigServiceImpl(PrefService* profile_prefs,
  52                                                PrefService* local_state_prefs)
  53     : PrefProxyConfigTrackerImpl(profile_prefs ? profile_prefs
  54                                                : local_state_prefs),
  55       active_config_state_(ProxyPrefs::CONFIG_UNSET),
  56       profile_prefs_(profile_prefs),
  57       local_state_prefs_(local_state_prefs),
  58       pointer_factory_(this) {
  59   const base::Closure proxy_change_callback = base::Bind(
  60       &ProxyConfigServiceImpl::OnProxyPrefChanged, base::Unretained(this));
  61
  62   if (profile_prefs) {
  63     profile_pref_registrar_.Init(profile_prefs);
  64     profile_pref_registrar_.Add(prefs::kOpenNetworkConfiguration,
  65                                 proxy_change_callback);
  66     profile_pref_registrar_.Add(prefs::kUseSharedProxies,
  67                                 proxy_change_callback);
  68   }
  69   local_state_pref_registrar_.Init(local_state_prefs);
  70   local_state_pref_registrar_.Add(prefs::kDeviceOpenNetworkConfiguration,
  71                                   proxy_change_callback);
  72
  73   // Register for changes to the default network.
  74   NetworkStateHandler* state_handler =
  75       NetworkHandler::Get()->network_state_handler();
  76   state_handler->AddObserver(this, FROM_HERE);
  77   DefaultNetworkChanged(state_handler->DefaultNetwork());
  78 }
  79
  80 ProxyConfigServiceImpl::~ProxyConfigServiceImpl() {
  81   if (NetworkHandler::IsInitialized()) {
  82     NetworkHandler::Get()->network_state_handler()->RemoveObserver(
  83         this, FROM_HERE);
  84   }
  85 }
  86
  87 void ProxyConfigServiceImpl::OnProxyConfigChanged(
  88     ProxyPrefs::ConfigState config_state,
  89     const net::ProxyConfig& config) {
  90   VLOG(1) << "Got prefs change: "
  91           << ProxyPrefs::ConfigStateToDebugString(config_state)
  92           << ", mode=" << config.proxy_rules().type;
  93   DetermineEffectiveConfigFromDefaultNetwork();
  94 }
  95
  96 void ProxyConfigServiceImpl::OnProxyPrefChanged() {
  97   DetermineEffectiveConfigFromDefaultNetwork();
  98 }
  99
 100 void ProxyConfigServiceImpl::DefaultNetworkChanged(
 101     const NetworkState* new_network) {
 102   std::string new_network_path;
 103   if (new_network)
 104     new_network_path = new_network->path();
 105
 106   VLOG(1) << "DefaultNetworkChanged to '" << new_network_path << "'.";
 107   VLOG_IF(1, new_network) << "New network: name=" << new_network->name()
 108                           << ", profile=" << new_network->profile_path();
 109
 110   // Even if the default network is the same, its proxy config (e.g. if private
 111   // version of network replaces the shared version after login), or
 112   // use-shared-proxies setting (e.g. after login) may have changed, so
 113   // re-determine effective proxy config, and activate if different.
 114   DetermineEffectiveConfigFromDefaultNetwork();
 115 }
 116
 117 // static
 118 bool ProxyConfigServiceImpl::IgnoreProxy(const PrefService* profile_prefs,
 119                                          const std::string network_profile_path,
 120                                          ::onc::ONCSource onc_source) {
 121   if (!profile_prefs) {
 122     // If the profile preference are not available, this must be the object
 123     // associated to local state used for system requests or login-profile. Make
 124     // sure that proxies are enabled.
 125     VLOG(1) << "Use proxy for system requests and sign-in screen.";
 126     return false;
 127   }
 128
 129   if (network_profile_path.empty())
 130     return true;
 131
 132   const NetworkProfile* profile = NetworkHandler::Get()
 133       ->network_profile_handler()->GetProfileForPath(network_profile_path);
 134   if (!profile) {
 135     VLOG(1) << "Unknown profile_path '" << network_profile_path
 136             << "'. Ignoring proxy.";
 137     return true;
 138   }
 139   if (profile->type() == NetworkProfile::TYPE_USER) {
 140     VLOG(1) << "Respect proxy of not-shared networks.";
 141     return false;
 142   }
 143   if (onc_source == ::onc::ONC_SOURCE_USER_POLICY) {
 144     // Note that this case can occur if the network is shared (e.g. ethernet)
 145     // but the proxy is determined by user policy.
 146     // See https://crbug.com/454966 .
 147     VLOG(1) << "Respect proxy from user policy although network is shared.";
 148     return false;
 149   }
 150   if (onc_source == ::onc::ONC_SOURCE_DEVICE_POLICY) {
 151     policy::BrowserPolicyConnectorChromeOS* connector =
 152         g_browser_process->platform_part()->browser_policy_connector_chromeos();
 153     const user_manager::User* logged_in_user =
 154         user_manager::UserManager::Get()->GetLoggedInUser();
 155     if (connector->GetUserAffiliation(logged_in_user->email()) ==
 156         policy::USER_AFFILIATION_MANAGED) {
 157       VLOG(1) << "Respecting proxy for network, as logged-in user belongs to "
 158               << "the domain the device is enrolled to.";
 159       return false;
 160     }
 161   }
 162
 163   // This network is shared and not managed by the user's domain.
 164   bool use_shared_proxies = profile_prefs->GetBoolean(prefs::kUseSharedProxies);
 165   VLOG(1) << "Use proxy of shared network: " << use_shared_proxies;
 166   return !use_shared_proxies;
 167 }
 168
 169 void ProxyConfigServiceImpl::DetermineEffectiveConfigFromDefaultNetwork() {
 170   NetworkStateHandler* handler = NetworkHandler::Get()->network_state_handler();
 171   const NetworkState* network = handler->DefaultNetwork();
 172
 173   // Get prefs proxy config if available.
 174   net::ProxyConfig pref_config;
 175   ProxyPrefs::ConfigState pref_state = GetProxyConfig(&pref_config);
 176
 177   // Get network proxy config if available.
 178   net::ProxyConfig network_config;
 179   net::ProxyConfigService::ConfigAvailability network_availability =
 180       net::ProxyConfigService::CONFIG_UNSET;
 181   bool ignore_proxy = true;
 182   if (network) {
 183     ::onc::ONCSource onc_source = ::onc::ONC_SOURCE_NONE;
 184     const bool network_proxy_configured = chromeos::GetProxyConfig(
 185         prefs(), local_state_prefs_, *network, &network_config, &onc_source);
 186     ignore_proxy =
 187         IgnoreProxy(profile_prefs_, network->profile_path(), onc_source);
 188
 189     // If network is shared but use-shared-proxies is off, use direct mode.
 190     if (ignore_proxy) {
 191       network_config = net::ProxyConfig();
 192       network_availability = net::ProxyConfigService::CONFIG_VALID;
 193     } else if (network_proxy_configured) {
 194       // Network is private or shared with user using shared proxies.
 195       VLOG(1) << this << ": using proxy of network " << network->path();
 196       network_availability = net::ProxyConfigService::CONFIG_VALID;
 197     }
 198   }
 199
 200   // Determine effective proxy config, either from prefs or network.
 201   ProxyPrefs::ConfigState effective_config_state;
 202   net::ProxyConfig effective_config;
 203   GetEffectiveProxyConfig(pref_state, pref_config,
 204                           network_availability, network_config, ignore_proxy,
 205                           &effective_config_state, &effective_config);
 206
 207   // Activate effective proxy and store into |active_config_|.
 208   // If last update didn't complete, we definitely update now.
 209   bool update_now = update_pending();
 210   if (!update_now) {  // Otherwise, only update now if there're changes.
 211     update_now = active_config_state_ != effective_config_state ||
 212                  (active_config_state_ != ProxyPrefs::CONFIG_UNSET &&
 213                   !active_config_.Equals(effective_config));
 214   }
 215   if (update_now) {  // Activate and store new effective config.
 216     active_config_state_ = effective_config_state;
 217     if (active_config_state_ != ProxyPrefs::CONFIG_UNSET)
 218       active_config_ = effective_config;
 219     // If effective config is from system (i.e. network), it's considered a
 220     // special kind of prefs that ranks below policy/extension but above
 221     // others, so bump it up to CONFIG_OTHER_PRECEDE to force its precedence
 222     // when PrefProxyConfigTrackerImpl pushes it to ChromeProxyConfigService.
 223     if (effective_config_state == ProxyPrefs::CONFIG_SYSTEM)
 224       effective_config_state = ProxyPrefs::CONFIG_OTHER_PRECEDE;
 225     // If config is manual, add rule to bypass local host.
 226     if (effective_config.proxy_rules().type !=
 227         net::ProxyConfig::ProxyRules::TYPE_NO_RULES) {
 228       effective_config.proxy_rules().bypass_rules.AddRuleToBypassLocal();
 229     }
 230     PrefProxyConfigTrackerImpl::OnProxyConfigChanged(effective_config_state,
 231                                                      effective_config);
 232     if (VLOG_IS_ON(1) && !update_pending()) {  // Update was successful.
 233       scoped_ptr<base::DictionaryValue> config_dict(effective_config.ToValue());
 234       VLOG(1) << this << ": Proxy changed: "
 235               << ProxyPrefs::ConfigStateToDebugString(active_config_state_)
 236               << ", " << *config_dict;
 237     }
 238   }
 239 }
 240
 241 }  // namespace chromeos