src/chromeos/network/host_resolver_impl_chromeos.cc

   1 // Copyright 2014 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 "chromeos/network/host_resolver_impl_chromeos.h"
   6
   7 #include "base/message_loop/message_loop_proxy.h"
   8 #include "base/sys_info.h"
   9 #include "base/values.h"
  10 #include "chromeos/network/device_state.h"
  11 #include "chromeos/network/network_handler.h"
  12 #include "chromeos/network/network_state.h"
  13 #include "chromeos/network/network_state_handler.h"
  14 #include "chromeos/network/network_state_handler_observer.h"
  15 #include "net/base/address_list.h"
  16 #include "net/base/net_errors.h"
  17 #include "net/base/net_util.h"
  18 #include "third_party/cros_system_api/dbus/service_constants.h"
  19
  20 namespace chromeos {
  21
  22 // HostResolverImplChromeOS::NetworkStateHandlerObserver
  23 //
  24 // An instance of this class is created on the NetworkHandler (UI) thread and
  25 // manages its own lifetime, destroying itself when NetworkStateHandlerObserver
  26 // ::IsShuttingDown() gets called.
  27
  28 class HostResolverImplChromeOS::NetworkObserver
  29     : public chromeos::NetworkStateHandlerObserver {
  30  public:
  31   static void Create(
  32       const base::WeakPtr<HostResolverImplChromeOS>& resolver,
  33       scoped_refptr<base::MessageLoopProxy> resolver_message_loop,
  34       NetworkStateHandler* network_state_handler) {
  35     new NetworkObserver(resolver, resolver_message_loop, network_state_handler);
  36   }
  37
  38   NetworkObserver(const base::WeakPtr<HostResolverImplChromeOS>& resolver,
  39                   scoped_refptr<base::MessageLoopProxy> resolver_message_loop,
  40                   NetworkStateHandler* network_state_handler)
  41       : resolver_(resolver),
  42         resolver_message_loop_(resolver_message_loop),
  43         network_state_handler_(network_state_handler),
  44         weak_ptr_factory_resolver_thread_(this) {
  45     network_state_handler_->AddObserver(this, FROM_HERE);
  46     DefaultNetworkChanged(network_state_handler_->DefaultNetwork());
  47   }
  48
  49  private:
  50   virtual ~NetworkObserver() {
  51     network_state_handler_->RemoveObserver(this, FROM_HERE);
  52   }
  53
  54   // NetworkStateHandlerObserver
  55   virtual void DefaultNetworkChanged(const NetworkState* network) override {
  56     if (!network) {
  57       DVLOG(2) << "DefaultNetworkChanged: No Network.";
  58       CallResolverSetIpAddress("", "");
  59       return;
  60     }
  61     std::string ipv4_address, ipv6_address;
  62     const DeviceState* device_state =
  63         network_state_handler_->GetDeviceState(network->device_path());
  64     if (!device_state) {
  65       LOG_IF(ERROR, base::SysInfo::IsRunningOnChromeOS())
  66           << "DefaultNetworkChanged: Network missing device: "
  67           << network->path();
  68       CallResolverSetIpAddress("", "");
  69       return;
  70     }
  71     for (base::DictionaryValue::Iterator iter(device_state->ip_configs());
  72          !iter.IsAtEnd(); iter.Advance()) {
  73       const base::DictionaryValue* ip_config;
  74       if (!iter.value().GetAsDictionary(&ip_config)) {
  75         LOG(ERROR) << "Badly formatted IPConfigs: " << network->path();
  76         continue;
  77       }
  78       std::string method, address;
  79       if (ip_config->GetString(shill::kMethodProperty, &method) &&
  80           ip_config->GetString(shill::kAddressProperty, &address)) {
  81         if (method == shill::kTypeIPv4 || method == shill::kTypeDHCP)
  82           ipv4_address = address;
  83         else if (method == shill::kTypeIPv6 || method == shill::kTypeDHCP6)
  84           ipv6_address = address;
  85       } else {
  86         LOG(ERROR) << "DefaultNetworkChanged: IPConfigs missing properties: "
  87                    << network->path();
  88       }
  89     }
  90     DVLOG(2) << "DefaultNetworkChanged: " << network->name()
  91              << " IPv4: " << ipv4_address << " IPv6: " << ipv6_address;
  92     CallResolverSetIpAddress(ipv4_address, ipv6_address);
  93   }
  94
  95   virtual void IsShuttingDown() override {
  96     delete this;
  97   }
  98
  99   void CallResolverSetIpAddress(const std::string& ipv4_address,
 100                                 const std::string& ipv6_address) {
 101     resolver_message_loop_->PostTask(
 102         FROM_HERE,
 103         base::Bind(&NetworkObserver::SetIpAddressOnResolverThread,
 104                    weak_ptr_factory_resolver_thread_.GetWeakPtr(),
 105                    ipv4_address, ipv6_address));
 106   }
 107
 108   void SetIpAddressOnResolverThread(const std::string& ipv4_address,
 109                                     const std::string& ipv6_address) {
 110     if (resolver_)
 111       resolver_->SetIPAddresses(ipv4_address, ipv6_address);
 112   }
 113
 114   base::WeakPtr<HostResolverImplChromeOS> resolver_;
 115   scoped_refptr<base::MessageLoopProxy> resolver_message_loop_;
 116   NetworkStateHandler* network_state_handler_;
 117   base::WeakPtrFactory<NetworkObserver> weak_ptr_factory_resolver_thread_;
 118
 119   DISALLOW_COPY_AND_ASSIGN(NetworkObserver);
 120 };
 121
 122 // HostResolverImplChromeOS
 123
 124 HostResolverImplChromeOS::HostResolverImplChromeOS(
 125     scoped_refptr<base::MessageLoopProxy> network_handler_message_loop,
 126     NetworkStateHandler* network_state_handler,
 127     const Options& options,
 128     net::NetLog* net_log)
 129     : HostResolverImpl(options, net_log),
 130       network_handler_message_loop_(network_handler_message_loop),
 131       weak_ptr_factory_(this) {
 132   network_handler_message_loop->PostTask(
 133       FROM_HERE,
 134       base::Bind(&NetworkObserver::Create,
 135                  weak_ptr_factory_.GetWeakPtr(),
 136                  base::MessageLoopProxy::current(),
 137                  network_state_handler));
 138 }
 139
 140 HostResolverImplChromeOS::~HostResolverImplChromeOS() {
 141 }
 142
 143 int HostResolverImplChromeOS::Resolve(const RequestInfo& info,
 144                                       net::RequestPriority priority,
 145                                       net::AddressList* addresses,
 146                                       const net::CompletionCallback& callback,
 147                                       RequestHandle* out_req,
 148                                       const net::BoundNetLog& source_net_log) {
 149   DCHECK(thread_checker_.CalledOnValidThread());
 150   if (ResolveLocalIPAddress(info, addresses))
 151     return net::OK;
 152   return net::HostResolverImpl::Resolve(
 153       info, priority, addresses, callback, out_req, source_net_log);
 154 }
 155
 156 void HostResolverImplChromeOS::SetIPAddresses(const std::string& ipv4_address,
 157                                               const std::string& ipv6_address) {
 158   DCHECK(thread_checker_.CalledOnValidThread());
 159   ipv4_address_ = ipv4_address;
 160   ipv6_address_ = ipv6_address;
 161 }
 162
 163 bool HostResolverImplChromeOS::ResolveLocalIPAddress(
 164     const RequestInfo& info,
 165     net::AddressList* addresses) {
 166   DCHECK(thread_checker_.CalledOnValidThread());
 167   if (!info.is_my_ip_address() || ipv4_address_.empty())
 168     return false;
 169
 170   // Use IPConfig data for localhost address lookup.
 171   addresses->clear();
 172
 173   if (info.address_family() != net::ADDRESS_FAMILY_IPV4 &&
 174       !ipv6_address_.empty()) {
 175     net::IPAddressNumber ipv6;
 176     if (net::ParseIPLiteralToNumber(ipv6_address_, &ipv6))
 177       addresses->push_back(net::IPEndPoint(ipv6, 0));
 178   }
 179
 180   net::IPAddressNumber ipv4;
 181   if (net::ParseIPLiteralToNumber(ipv4_address_, &ipv4))
 182     addresses->push_back(net::IPEndPoint(ipv4, 0));
 183
 184   DVLOG(2) << "ResolveLocalIPAddress("
 185            << static_cast<int>(info.address_family()) << "): "
 186            << addresses->size()
 187            << " IPv4: " << ipv4_address_ << " IPv6: " << ipv6_address_;
 188   addresses->SetDefaultCanonicalName();
 189   return true;
 190 }
 191
 192 // static
 193 scoped_ptr<net::HostResolver> HostResolverImplChromeOS::CreateSystemResolver(
 194     const Options& options,
 195     net::NetLog* net_log) {
 196   return scoped_ptr<net::HostResolver>(new HostResolverImplChromeOS(
 197       NetworkHandler::Get()->message_loop(),
 198       NetworkHandler::Get()->network_state_handler(),
 199       options,
 200       net_log));
 201 }
 202
 203 // static
 204 scoped_ptr<net::HostResolver>
 205 HostResolverImplChromeOS::CreateHostResolverForTest(
 206     scoped_refptr<base::MessageLoopProxy> network_handler_message_loop,
 207     NetworkStateHandler* network_state_handler) {
 208   Options options;
 209   return scoped_ptr<net::HostResolver>(new HostResolverImplChromeOS(
 210       network_handler_message_loop,
 211       network_state_handler,
 212       options,
 213       NULL));
 214 }
 215
 216 }  // namespace chromeos