chrome/browser/io_thread.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/io_thread.h"
   6
   7 #include <vector>
   8
   9 #include "base/base64.h"
  10 #include "base/bind.h"
  11 #include "base/bind_helpers.h"
  12 #include "base/command_line.h"
  13 #include "base/compiler_specific.h"
  14 #include "base/debug/leak_tracker.h"
  15 #include "base/logging.h"
  16 #include "base/metrics/field_trial.h"
  17 #include "base/metrics/user_metrics.h"
  18 #include "base/prefs/pref_registry_simple.h"
  19 #include "base/prefs/pref_service.h"
  20 #include "base/profiler/scoped_tracker.h"
  21 #include "base/stl_util.h"
  22 #include "base/strings/string_number_conversions.h"
  23 #include "base/strings/string_piece.h"
  24 #include "base/strings/string_split.h"
  25 #include "base/strings/string_util.h"
  26 #include "base/threading/sequenced_worker_pool.h"
  27 #include "base/threading/thread.h"
  28 #include "base/threading/worker_pool.h"
  29 #include "base/time/time.h"
  30 #include "base/trace_event/trace_event.h"
  31 #include "build/build_config.h"
  32 #include "chrome/browser/browser_process.h"
  33 #include "chrome/browser/net/async_dns_field_trial.h"
  34 #include "chrome/browser/net/chrome_net_log.h"
  35 #include "chrome/browser/net/chrome_network_delegate.h"
  36 #include "chrome/browser/net/connect_interceptor.h"
  37 #include "chrome/browser/net/dns_probe_service.h"
  38 #include "chrome/browser/net/pref_proxy_config_tracker.h"
  39 #include "chrome/browser/net/proxy_service_factory.h"
  40 #include "chrome/common/chrome_content_client.h"
  41 #include "chrome/common/chrome_switches.h"
  42 #include "chrome/common/chrome_version_info.h"
  43 #include "chrome/common/pref_names.h"
  44 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_prefs.h"
  45 #include "components/policy/core/common/policy_service.h"
  46 #include "components/variations/variations_associated_data.h"
  47 #include "content/public/browser/browser_thread.h"
  48 #include "content/public/browser/cookie_store_factory.h"
  49 #include "net/base/host_mapping_rules.h"
  50 #include "net/base/net_util.h"
  51 #include "net/cert/cert_policy_enforcer.h"
  52 #include "net/cert/cert_verifier.h"
  53 #include "net/cert/cert_verify_proc.h"
  54 #include "net/cert/ct_known_logs.h"
  55 #include "net/cert/ct_known_logs_static.h"
  56 #include "net/cert/ct_log_verifier.h"
  57 #include "net/cert/ct_verifier.h"
  58 #include "net/cert/multi_log_ct_verifier.h"
  59 #include "net/cert/multi_threaded_cert_verifier.h"
  60 #include "net/cookies/cookie_store.h"
  61 #include "net/dns/host_cache.h"
  62 #include "net/dns/host_resolver.h"
  63 #include "net/dns/mapped_host_resolver.h"
  64 #include "net/ftp/ftp_network_layer.h"
  65 #include "net/http/http_auth_filter.h"
  66 #include "net/http/http_auth_handler_factory.h"
  67 #include "net/http/http_network_layer.h"
  68 #include "net/http/http_server_properties_impl.h"
  69 #include "net/proxy/proxy_config_service.h"
  70 #include "net/proxy/proxy_script_fetcher_impl.h"
  71 #include "net/proxy/proxy_service.h"
  72 #include "net/quic/crypto/crypto_protocol.h"
  73 #include "net/quic/quic_protocol.h"
  74 #include "net/quic/quic_utils.h"
  75 #include "net/socket/tcp_client_socket.h"
  76 #include "net/spdy/spdy_session.h"
  77 #include "net/ssl/channel_id_service.h"
  78 #include "net/ssl/default_channel_id_store.h"
  79 #include "net/url_request/data_protocol_handler.h"
  80 #include "net/url_request/file_protocol_handler.h"
  81 #include "net/url_request/ftp_protocol_handler.h"
  82 #include "net/url_request/static_http_user_agent_settings.h"
  83 #include "net/url_request/url_fetcher.h"
  84 #include "net/url_request/url_request_context.h"
  85 #include "net/url_request/url_request_context_getter.h"
  86 #include "net/url_request/url_request_job_factory_impl.h"
  87 #include "net/url_request/url_request_throttler_manager.h"
  88 #include "url/url_constants.h"
  89
  90 #if defined(ENABLE_CONFIGURATION_POLICY)
  91 #include "policy/policy_constants.h"
  92 #endif
  93
  94 #if defined(ENABLE_EXTENSIONS)
  95 #include "chrome/browser/extensions/event_router_forwarder.h"
  96 #endif
  97
  98 #if defined(USE_NSS) || defined(OS_IOS)
  99 #include "net/ocsp/nss_ocsp.h"
 100 #endif
 101
 102 #if defined(OS_ANDROID)
 103 #include "base/android/build_info.h"
 104 #endif
 105
 106 #if defined(OS_CHROMEOS)
 107 #include "chrome/browser/chromeos/net/cert_verify_proc_chromeos.h"
 108 #include "chromeos/network/host_resolver_impl_chromeos.h"
 109 #endif
 110
 111 using content::BrowserThread;
 112
 113 class SafeBrowsingURLRequestContext;
 114
 115 // The IOThread object must outlive any tasks posted to the IO thread before the
 116 // Quit task, so base::Bind() calls are not refcounted.
 117
 118 namespace {
 119
 120 const char kTCPFastOpenFieldTrialName[] = "TCPFastOpen";
 121 const char kTCPFastOpenHttpsEnabledGroupName[] = "HttpsEnabled";
 122
 123 const char kQuicFieldTrialName[] = "QUIC";
 124 const char kQuicFieldTrialEnabledGroupName[] = "Enabled";
 125 const char kQuicFieldTrialHttpsEnabledGroupName[] = "HttpsEnabled";
 126
 127 // The SPDY trial composes two different trial plus control groups:
 128 //  * A "holdback" group with SPDY disabled, and corresponding control
 129 //  (SPDY/3.1). The primary purpose of the holdback group is to encourage site
 130 //  operators to do feature detection rather than UA-sniffing. As such, this
 131 //  trial runs continuously.
 132 //  * A SPDY/4 experiment, for SPDY/4 (aka HTTP/2) vs SPDY/3.1 comparisons and
 133 //  eventual SPDY/4 deployment.
 134 const char kSpdyFieldTrialName[] = "SPDY";
 135 const char kSpdyFieldTrialHoldbackGroupNamePrefix[] = "SpdyDisabled";
 136 const char kSpdyFieldTrialHoldbackControlGroupName[] = "Control";
 137 const char kSpdyFieldTrialSpdy31GroupNamePrefix[] = "Spdy31Enabled";
 138 const char kSpdyFieldTrialSpdy4GroupNamePrefix[] = "Spdy4Enabled";
 139 const char kSpdyFieldTrialSpdy4ControlGroupName[] = "Spdy4Control";
 140
 141 // Field trial for Cache-Control: stale-while-revalidate directive.
 142 const char kStaleWhileRevalidateFieldTrialName[] = "StaleWhileRevalidate";
 143
 144 #if defined(OS_MACOSX) && !defined(OS_IOS)
 145 void ObserveKeychainEvents() {
 146   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 147   net::CertDatabase::GetInstance()->SetMessageLoopForKeychainEvents();
 148 }
 149 #endif
 150
 151 // Used for the "system" URLRequestContext.
 152 class SystemURLRequestContext : public net::URLRequestContext {
 153  public:
 154   SystemURLRequestContext() {
 155 #if defined(USE_NSS) || defined(OS_IOS)
 156     net::SetURLRequestContextForNSSHttpIO(this);
 157 #endif
 158   }
 159
 160  private:
 161   ~SystemURLRequestContext() override {
 162     AssertNoURLRequests();
 163 #if defined(USE_NSS) || defined(OS_IOS)
 164     net::SetURLRequestContextForNSSHttpIO(NULL);
 165 #endif
 166   }
 167 };
 168
 169 scoped_ptr<net::HostResolver> CreateGlobalHostResolver(net::NetLog* net_log) {
 170   TRACE_EVENT0("startup", "IOThread::CreateGlobalHostResolver");
 171   const base::CommandLine& command_line =
 172       *base::CommandLine::ForCurrentProcess();
 173
 174   net::HostResolver::Options options;
 175
 176   // Use the retry attempts override from the command-line, if any.
 177   if (command_line.HasSwitch(switches::kHostResolverRetryAttempts)) {
 178     std::string s =
 179         command_line.GetSwitchValueASCII(switches::kHostResolverRetryAttempts);
 180     // Parse the switch (it should be a non-negative integer).
 181     int n;
 182     if (base::StringToInt(s, &n) && n >= 0) {
 183       options.max_retry_attempts = static_cast<size_t>(n);
 184     } else {
 185       LOG(ERROR) << "Invalid switch for host resolver retry attempts: " << s;
 186     }
 187   }
 188
 189   scoped_ptr<net::HostResolver> global_host_resolver;
 190 #if defined OS_CHROMEOS
 191   global_host_resolver =
 192       chromeos::HostResolverImplChromeOS::CreateSystemResolver(options,
 193                                                                net_log);
 194 #else
 195   global_host_resolver =
 196       net::HostResolver::CreateSystemResolver(options, net_log);
 197 #endif
 198
 199   // Determine if we should disable IPv6 support.
 200   if (command_line.HasSwitch(switches::kEnableIPv6)) {
 201     // Disable IPv6 probing.
 202     global_host_resolver->SetDefaultAddressFamily(
 203         net::ADDRESS_FAMILY_UNSPECIFIED);
 204   } else if (command_line.HasSwitch(switches::kDisableIPv6)) {
 205     global_host_resolver->SetDefaultAddressFamily(net::ADDRESS_FAMILY_IPV4);
 206   }
 207
 208   // If hostname remappings were specified on the command-line, layer these
 209   // rules on top of the real host resolver. This allows forwarding all requests
 210   // through a designated test server.
 211   if (!command_line.HasSwitch(switches::kHostResolverRules))
 212     return global_host_resolver.Pass();
 213
 214   scoped_ptr<net::MappedHostResolver> remapped_resolver(
 215       new net::MappedHostResolver(global_host_resolver.Pass()));
 216   remapped_resolver->SetRulesFromString(
 217       command_line.GetSwitchValueASCII(switches::kHostResolverRules));
 218   return remapped_resolver.Pass();
 219 }
 220
 221 // TODO(willchan): Remove proxy script fetcher context since it's not necessary
 222 // now that I got rid of refcounting URLRequestContexts.
 223 // See IOThread::Globals for details.
 224 net::URLRequestContext*
 225 ConstructProxyScriptFetcherContext(IOThread::Globals* globals,
 226                                    net::NetLog* net_log) {
 227   net::URLRequestContext* context = new net::URLRequestContext;
 228   context->set_net_log(net_log);
 229   context->set_host_resolver(globals->host_resolver.get());
 230   context->set_cert_verifier(globals->cert_verifier.get());
 231   context->set_transport_security_state(
 232       globals->transport_security_state.get());
 233   context->set_cert_transparency_verifier(
 234       globals->cert_transparency_verifier.get());
 235   context->set_http_auth_handler_factory(
 236       globals->http_auth_handler_factory.get());
 237   context->set_proxy_service(globals->proxy_script_fetcher_proxy_service.get());
 238   context->set_http_transaction_factory(
 239       globals->proxy_script_fetcher_http_transaction_factory.get());
 240   context->set_job_factory(
 241       globals->proxy_script_fetcher_url_request_job_factory.get());
 242   context->set_cookie_store(globals->system_cookie_store.get());
 243   context->set_channel_id_service(
 244       globals->system_channel_id_service.get());
 245   context->set_network_delegate(globals->system_network_delegate.get());
 246   context->set_http_user_agent_settings(
 247       globals->http_user_agent_settings.get());
 248   // TODO(rtenneti): We should probably use HttpServerPropertiesManager for the
 249   // system URLRequestContext too. There's no reason this should be tied to a
 250   // profile.
 251   return context;
 252 }
 253
 254 net::URLRequestContext*
 255 ConstructSystemRequestContext(IOThread::Globals* globals,
 256                               net::NetLog* net_log) {
 257   // TODO(michaeln): Remove ScopedTracker below once crbug.com/454983 is fixed.
 258   tracked_objects::ScopedTracker tracking_profile(
 259       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 260           "454983 ConstructSystemRequestContext"));
 261   net::URLRequestContext* context = new SystemURLRequestContext;
 262   context->set_net_log(net_log);
 263   context->set_host_resolver(globals->host_resolver.get());
 264   context->set_cert_verifier(globals->cert_verifier.get());
 265   context->set_transport_security_state(
 266       globals->transport_security_state.get());
 267   context->set_cert_transparency_verifier(
 268       globals->cert_transparency_verifier.get());
 269   context->set_http_auth_handler_factory(
 270       globals->http_auth_handler_factory.get());
 271   context->set_proxy_service(globals->system_proxy_service.get());
 272   context->set_http_transaction_factory(
 273       globals->system_http_transaction_factory.get());
 274   context->set_job_factory(globals->system_url_request_job_factory.get());
 275   context->set_cookie_store(globals->system_cookie_store.get());
 276   context->set_channel_id_service(
 277       globals->system_channel_id_service.get());
 278   context->set_throttler_manager(globals->throttler_manager.get());
 279   context->set_network_delegate(globals->system_network_delegate.get());
 280   context->set_http_user_agent_settings(
 281       globals->http_user_agent_settings.get());
 282   return context;
 283 }
 284
 285 int GetSwitchValueAsInt(const base::CommandLine& command_line,
 286                         const std::string& switch_name) {
 287   int value;
 288   if (!base::StringToInt(command_line.GetSwitchValueASCII(switch_name),
 289                          &value)) {
 290     return 0;
 291   }
 292   return value;
 293 }
 294
 295 // Returns the value associated with |key| in |params| or "" if the
 296 // key is not present in the map.
 297 const std::string& GetVariationParam(
 298     const std::map<std::string, std::string>& params,
 299     const std::string& key) {
 300   std::map<std::string, std::string>::const_iterator it = params.find(key);
 301   if (it == params.end())
 302     return base::EmptyString();
 303
 304   return it->second;
 305 }
 306
 307 // Return true if stale-while-revalidate support should be enabled.
 308 bool IsStaleWhileRevalidateEnabled(const base::CommandLine& command_line) {
 309   if (command_line.HasSwitch(switches::kEnableStaleWhileRevalidate))
 310     return true;
 311   const std::string group_name =
 312       base::FieldTrialList::FindFullName(kStaleWhileRevalidateFieldTrialName);
 313   return group_name == "Enabled";
 314 }
 315
 316 bool IsCertificateTransparencyRequiredForEV(
 317     const base::CommandLine& command_line) {
 318   const std::string group_name =
 319       base::FieldTrialList::FindFullName("CTRequiredForEVTrial");
 320
 321   if (command_line.HasSwitch(switches::kRequireCTForEV))
 322     return true;
 323
 324   return group_name == "RequirementEnforced";
 325 }
 326
 327 }  // namespace
 328
 329 class IOThread::LoggingNetworkChangeObserver
 330     : public net::NetworkChangeNotifier::IPAddressObserver,
 331       public net::NetworkChangeNotifier::ConnectionTypeObserver,
 332       public net::NetworkChangeNotifier::NetworkChangeObserver {
 333  public:
 334   // |net_log| must remain valid throughout our lifetime.
 335   explicit LoggingNetworkChangeObserver(net::NetLog* net_log)
 336       : net_log_(net_log) {
 337     net::NetworkChangeNotifier::AddIPAddressObserver(this);
 338     net::NetworkChangeNotifier::AddConnectionTypeObserver(this);
 339     net::NetworkChangeNotifier::AddNetworkChangeObserver(this);
 340   }
 341
 342   ~LoggingNetworkChangeObserver() override {
 343     net::NetworkChangeNotifier::RemoveIPAddressObserver(this);
 344     net::NetworkChangeNotifier::RemoveConnectionTypeObserver(this);
 345     net::NetworkChangeNotifier::RemoveNetworkChangeObserver(this);
 346   }
 347
 348   // NetworkChangeNotifier::IPAddressObserver implementation.
 349   void OnIPAddressChanged() override {
 350     VLOG(1) << "Observed a change to the network IP addresses";
 351
 352     net_log_->AddGlobalEntry(net::NetLog::TYPE_NETWORK_IP_ADDRESSES_CHANGED);
 353   }
 354
 355   // NetworkChangeNotifier::ConnectionTypeObserver implementation.
 356   void OnConnectionTypeChanged(
 357       net::NetworkChangeNotifier::ConnectionType type) override {
 358     std::string type_as_string =
 359         net::NetworkChangeNotifier::ConnectionTypeToString(type);
 360
 361     VLOG(1) << "Observed a change to network connectivity state "
 362             << type_as_string;
 363
 364     net_log_->AddGlobalEntry(
 365         net::NetLog::TYPE_NETWORK_CONNECTIVITY_CHANGED,
 366         net::NetLog::StringCallback("new_connection_type", &type_as_string));
 367   }
 368
 369   // NetworkChangeNotifier::NetworkChangeObserver implementation.
 370   void OnNetworkChanged(
 371       net::NetworkChangeNotifier::ConnectionType type) override {
 372     std::string type_as_string =
 373         net::NetworkChangeNotifier::ConnectionTypeToString(type);
 374
 375     VLOG(1) << "Observed a network change to state " << type_as_string;
 376
 377     net_log_->AddGlobalEntry(
 378         net::NetLog::TYPE_NETWORK_CHANGED,
 379         net::NetLog::StringCallback("new_connection_type", &type_as_string));
 380   }
 381
 382  private:
 383   net::NetLog* net_log_;
 384   DISALLOW_COPY_AND_ASSIGN(LoggingNetworkChangeObserver);
 385 };
 386
 387 class SystemURLRequestContextGetter : public net::URLRequestContextGetter {
 388  public:
 389   explicit SystemURLRequestContextGetter(IOThread* io_thread);
 390
 391   // Implementation for net::UrlRequestContextGetter.
 392   net::URLRequestContext* GetURLRequestContext() override;
 393   scoped_refptr<base::SingleThreadTaskRunner> GetNetworkTaskRunner()
 394       const override;
 395
 396  protected:
 397   ~SystemURLRequestContextGetter() override;
 398
 399  private:
 400   IOThread* const io_thread_;  // Weak pointer, owned by BrowserProcess.
 401   scoped_refptr<base::SingleThreadTaskRunner> network_task_runner_;
 402
 403   base::debug::LeakTracker<SystemURLRequestContextGetter> leak_tracker_;
 404 };
 405
 406 SystemURLRequestContextGetter::SystemURLRequestContextGetter(
 407     IOThread* io_thread)
 408     : io_thread_(io_thread),
 409       network_task_runner_(
 410           BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO)) {
 411 }
 412
 413 SystemURLRequestContextGetter::~SystemURLRequestContextGetter() {}
 414
 415 net::URLRequestContext* SystemURLRequestContextGetter::GetURLRequestContext() {
 416   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 417   DCHECK(io_thread_->globals()->system_request_context.get());
 418
 419   return io_thread_->globals()->system_request_context.get();
 420 }
 421
 422 scoped_refptr<base::SingleThreadTaskRunner>
 423 SystemURLRequestContextGetter::GetNetworkTaskRunner() const {
 424   return network_task_runner_;
 425 }
 426
 427 IOThread::Globals::
 428 SystemRequestContextLeakChecker::SystemRequestContextLeakChecker(
 429     Globals* globals)
 430     : globals_(globals) {
 431   DCHECK(globals_);
 432 }
 433
 434 IOThread::Globals::
 435 SystemRequestContextLeakChecker::~SystemRequestContextLeakChecker() {
 436   if (globals_->system_request_context.get())
 437     globals_->system_request_context->AssertNoURLRequests();
 438 }
 439
 440 IOThread::Globals::Globals()
 441     : system_request_context_leak_checker(this),
 442       enable_ssl_connect_job_waiting(false),
 443       ignore_certificate_errors(false),
 444       use_stale_while_revalidate(false),
 445       testing_fixed_http_port(0),
 446       testing_fixed_https_port(0),
 447       enable_user_alternate_protocol_ports(false) {
 448 }
 449
 450 IOThread::Globals::~Globals() {}
 451
 452 // |local_state| is passed in explicitly in order to (1) reduce implicit
 453 // dependencies and (2) make IOThread more flexible for testing.
 454 IOThread::IOThread(
 455     PrefService* local_state,
 456     policy::PolicyService* policy_service,
 457     ChromeNetLog* net_log,
 458     extensions::EventRouterForwarder* extension_event_router_forwarder)
 459     : net_log_(net_log),
 460 #if defined(ENABLE_EXTENSIONS)
 461       extension_event_router_forwarder_(extension_event_router_forwarder),
 462 #endif
 463       globals_(NULL),
 464       is_spdy_disabled_by_policy_(false),
 465       creation_time_(base::TimeTicks::Now()),
 466       weak_factory_(this) {
 467   auth_schemes_ = local_state->GetString(prefs::kAuthSchemes);
 468   negotiate_disable_cname_lookup_ = local_state->GetBoolean(
 469       prefs::kDisableAuthNegotiateCnameLookup);
 470   negotiate_enable_port_ = local_state->GetBoolean(
 471       prefs::kEnableAuthNegotiatePort);
 472   auth_server_whitelist_ = local_state->GetString(prefs::kAuthServerWhitelist);
 473   auth_delegate_whitelist_ = local_state->GetString(
 474       prefs::kAuthNegotiateDelegateWhitelist);
 475   gssapi_library_name_ = local_state->GetString(prefs::kGSSAPILibraryName);
 476   pref_proxy_config_tracker_.reset(
 477       ProxyServiceFactory::CreatePrefProxyConfigTrackerOfLocalState(
 478           local_state));
 479   ChromeNetworkDelegate::InitializePrefsOnUIThread(
 480       &system_enable_referrers_,
 481       NULL,
 482       NULL,
 483       NULL,
 484       NULL,
 485       local_state);
 486   ssl_config_service_manager_.reset(
 487       SSLConfigServiceManager::CreateDefaultManager(local_state));
 488
 489   base::Value* dns_client_enabled_default = new base::FundamentalValue(
 490       chrome_browser_net::ConfigureAsyncDnsFieldTrial());
 491   local_state->SetDefaultPrefValue(prefs::kBuiltInDnsClientEnabled,
 492                                    dns_client_enabled_default);
 493   chrome_browser_net::LogAsyncDnsPrefSource(
 494       local_state->FindPreference(prefs::kBuiltInDnsClientEnabled));
 495
 496   dns_client_enabled_.Init(prefs::kBuiltInDnsClientEnabled,
 497                            local_state,
 498                            base::Bind(&IOThread::UpdateDnsClientEnabled,
 499                                       base::Unretained(this)));
 500   dns_client_enabled_.MoveToThread(
 501       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO));
 502
 503   quick_check_enabled_.Init(prefs::kQuickCheckEnabled,
 504                             local_state);
 505   quick_check_enabled_.MoveToThread(
 506       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO));
 507
 508 #if defined(ENABLE_CONFIGURATION_POLICY)
 509   is_spdy_disabled_by_policy_ = policy_service->GetPolicies(
 510       policy::PolicyNamespace(policy::POLICY_DOMAIN_CHROME, std::string())).Get(
 511           policy::key::kDisableSpdy) != NULL;
 512 #endif  // ENABLE_CONFIGURATION_POLICY
 513
 514   BrowserThread::SetDelegate(BrowserThread::IO, this);
 515 }
 516
 517 IOThread::~IOThread() {
 518   // This isn't needed for production code, but in tests, IOThread may
 519   // be multiply constructed.
 520   BrowserThread::SetDelegate(BrowserThread::IO, NULL);
 521
 522   pref_proxy_config_tracker_->DetachFromPrefService();
 523   DCHECK(!globals_);
 524 }
 525
 526 IOThread::Globals* IOThread::globals() {
 527   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 528   return globals_;
 529 }
 530
 531 void IOThread::SetGlobalsForTesting(Globals* globals) {
 532   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 533   DCHECK(!globals || !globals_);
 534   globals_ = globals;
 535 }
 536
 537 ChromeNetLog* IOThread::net_log() {
 538   return net_log_;
 539 }
 540
 541 void IOThread::ChangedToOnTheRecord() {
 542   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 543   BrowserThread::PostTask(
 544       BrowserThread::IO,
 545       FROM_HERE,
 546       base::Bind(&IOThread::ChangedToOnTheRecordOnIOThread,
 547                  base::Unretained(this)));
 548 }
 549
 550 net::URLRequestContextGetter* IOThread::system_url_request_context_getter() {
 551   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 552   if (!system_url_request_context_getter_.get()) {
 553     InitSystemRequestContext();
 554   }
 555   return system_url_request_context_getter_.get();
 556 }
 557
 558 void IOThread::Init() {
 559   // Prefer to use InitAsync unless you need initialization to block
 560   // the UI thread
 561 }
 562
 563 void IOThread::InitAsync() {
 564   TRACE_EVENT0("startup", "IOThread::InitAsync");
 565   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 566
 567 #if defined(USE_NSS) || defined(OS_IOS)
 568   net::SetMessageLoopForNSSHttpIO();
 569 #endif
 570
 571   const base::CommandLine& command_line =
 572       *base::CommandLine::ForCurrentProcess();
 573
 574   DCHECK(!globals_);
 575   globals_ = new Globals;
 576
 577   // Add an observer that will emit network change events to the ChromeNetLog.
 578   // Assuming NetworkChangeNotifier dispatches in FIFO order, we should be
 579   // logging the network change before other IO thread consumers respond to it.
 580   network_change_observer_.reset(
 581       new LoggingNetworkChangeObserver(net_log_));
 582
 583   // Setup the HistogramWatcher to run on the IO thread.
 584   net::NetworkChangeNotifier::InitHistogramWatcher();
 585
 586 #if defined(ENABLE_EXTENSIONS)
 587   globals_->extension_event_router_forwarder =
 588       extension_event_router_forwarder_;
 589 #endif
 590
 591   scoped_ptr<ChromeNetworkDelegate> chrome_network_delegate(
 592       new ChromeNetworkDelegate(extension_event_router_forwarder(),
 593                                 &system_enable_referrers_));
 594
 595   if (command_line.HasSwitch(switches::kEnableClientHints))
 596     chrome_network_delegate->SetEnableClientHints();
 597
 598 #if defined(ENABLE_EXTENSIONS)
 599   if (command_line.HasSwitch(switches::kDisableExtensionsHttpThrottling))
 600     chrome_network_delegate->NeverThrottleRequests();
 601 #endif
 602
 603   globals_->system_network_delegate = chrome_network_delegate.Pass();
 604   globals_->host_resolver = CreateGlobalHostResolver(net_log_);
 605   UpdateDnsClientEnabled();
 606 #if defined(OS_CHROMEOS)
 607   // Creates a CertVerifyProc that doesn't allow any profile-provided certs.
 608   globals_->cert_verifier.reset(new net::MultiThreadedCertVerifier(
 609       new chromeos::CertVerifyProcChromeOS()));
 610 #else
 611   globals_->cert_verifier.reset(new net::MultiThreadedCertVerifier(
 612       net::CertVerifyProc::CreateDefault()));
 613 #endif
 614
 615   globals_->transport_security_state.reset(new net::TransportSecurityState());
 616
 617   net::MultiLogCTVerifier* ct_verifier = new net::MultiLogCTVerifier();
 618   globals_->cert_transparency_verifier.reset(ct_verifier);
 619
 620   // Add built-in logs
 621   ct_verifier->AddLogs(net::ct::CreateLogVerifiersForKnownLogs());
 622
 623   // Add logs from command line
 624   if (command_line.HasSwitch(switches::kCertificateTransparencyLog)) {
 625     std::string switch_value = command_line.GetSwitchValueASCII(
 626         switches::kCertificateTransparencyLog);
 627     std::vector<std::string> logs;
 628     base::SplitString(switch_value, ',', &logs);
 629     for (std::vector<std::string>::iterator it = logs.begin(); it != logs.end();
 630          ++it) {
 631       const std::string& curr_log = *it;
 632       size_t delim_pos = curr_log.find(":");
 633       CHECK(delim_pos != std::string::npos)
 634           << "CT log description not provided (switch format"
 635              " is 'description:base64_key')";
 636       std::string log_description(curr_log.substr(0, delim_pos));
 637       std::string ct_public_key_data;
 638       CHECK(base::Base64Decode(curr_log.substr(delim_pos + 1),
 639                                &ct_public_key_data))
 640           << "Unable to decode CT public key.";
 641       scoped_ptr<net::CTLogVerifier> external_log_verifier(
 642           net::CTLogVerifier::Create(ct_public_key_data, log_description));
 643       CHECK(external_log_verifier) << "Unable to parse CT public key.";
 644       VLOG(1) << "Adding log with description " << log_description;
 645       ct_verifier->AddLog(external_log_verifier.Pass());
 646     }
 647   }
 648
 649   net::CertPolicyEnforcer* policy_enforcer = NULL;
 650   policy_enforcer = new net::CertPolicyEnforcer(
 651       IsCertificateTransparencyRequiredForEV(command_line));
 652   globals_->cert_policy_enforcer.reset(policy_enforcer);
 653
 654   globals_->ssl_config_service = GetSSLConfigService();
 655
 656   globals_->http_auth_handler_factory.reset(CreateDefaultAuthHandlerFactory(
 657       globals_->host_resolver.get()));
 658   globals_->http_server_properties.reset(new net::HttpServerPropertiesImpl());
 659   // For the ProxyScriptFetcher, we use a direct ProxyService.
 660   globals_->proxy_script_fetcher_proxy_service.reset(
 661       net::ProxyService::CreateDirectWithNetLog(net_log_));
 662   // In-memory cookie store.
 663   globals_->system_cookie_store =
 664         content::CreateCookieStore(content::CookieStoreConfig());
 665   // In-memory channel ID store.
 666   globals_->system_channel_id_service.reset(
 667       new net::ChannelIDService(
 668           new net::DefaultChannelIDStore(NULL),
 669           base::WorkerPool::GetTaskRunner(true)));
 670   globals_->dns_probe_service.reset(new chrome_browser_net::DnsProbeService());
 671   globals_->host_mapping_rules.reset(new net::HostMappingRules());
 672   globals_->http_user_agent_settings.reset(
 673       new net::StaticHttpUserAgentSettings(std::string(), GetUserAgent()));
 674   if (command_line.HasSwitch(switches::kHostRules)) {
 675     TRACE_EVENT_BEGIN0("startup", "IOThread::InitAsync:SetRulesFromString");
 676     globals_->host_mapping_rules->SetRulesFromString(
 677         command_line.GetSwitchValueASCII(switches::kHostRules));
 678     TRACE_EVENT_END0("startup", "IOThread::InitAsync:SetRulesFromString");
 679   }
 680   if (command_line.HasSwitch(switches::kEnableSSLConnectJobWaiting))
 681     globals_->enable_ssl_connect_job_waiting = true;
 682   if (command_line.HasSwitch(switches::kIgnoreCertificateErrors))
 683     globals_->ignore_certificate_errors = true;
 684   globals_->use_stale_while_revalidate =
 685       IsStaleWhileRevalidateEnabled(command_line);
 686   if (command_line.HasSwitch(switches::kTestingFixedHttpPort)) {
 687     globals_->testing_fixed_http_port =
 688         GetSwitchValueAsInt(command_line, switches::kTestingFixedHttpPort);
 689   }
 690   if (command_line.HasSwitch(switches::kTestingFixedHttpsPort)) {
 691     globals_->testing_fixed_https_port =
 692         GetSwitchValueAsInt(command_line, switches::kTestingFixedHttpsPort);
 693   }
 694   ConfigureQuic(command_line);
 695   if (command_line.HasSwitch(
 696           switches::kEnableUserAlternateProtocolPorts)) {
 697     globals_->enable_user_alternate_protocol_ports = true;
 698   }
 699   InitializeNetworkOptions(command_line);
 700
 701   net::HttpNetworkSession::Params session_params;
 702   InitializeNetworkSessionParams(&session_params);
 703   session_params.net_log = net_log_;
 704   session_params.proxy_service =
 705       globals_->proxy_script_fetcher_proxy_service.get();
 706
 707   TRACE_EVENT_BEGIN0("startup", "IOThread::InitAsync:HttpNetworkSession");
 708   scoped_refptr<net::HttpNetworkSession> network_session(
 709       new net::HttpNetworkSession(session_params));
 710   globals_->proxy_script_fetcher_http_transaction_factory
 711       .reset(new net::HttpNetworkLayer(network_session.get()));
 712   TRACE_EVENT_END0("startup", "IOThread::InitAsync:HttpNetworkSession");
 713   scoped_ptr<net::URLRequestJobFactoryImpl> job_factory(
 714       new net::URLRequestJobFactoryImpl());
 715   job_factory->SetProtocolHandler(url::kDataScheme,
 716                                   new net::DataProtocolHandler());
 717   job_factory->SetProtocolHandler(
 718       url::kFileScheme,
 719       new net::FileProtocolHandler(
 720           content::BrowserThread::GetBlockingPool()->
 721               GetTaskRunnerWithShutdownBehavior(
 722                   base::SequencedWorkerPool::SKIP_ON_SHUTDOWN)));
 723 #if !defined(DISABLE_FTP_SUPPORT)
 724   globals_->proxy_script_fetcher_ftp_transaction_factory.reset(
 725       new net::FtpNetworkLayer(globals_->host_resolver.get()));
 726   job_factory->SetProtocolHandler(
 727       url::kFtpScheme,
 728       new net::FtpProtocolHandler(
 729           globals_->proxy_script_fetcher_ftp_transaction_factory.get()));
 730 #endif
 731   globals_->proxy_script_fetcher_url_request_job_factory = job_factory.Pass();
 732
 733   globals_->throttler_manager.reset(new net::URLRequestThrottlerManager());
 734   globals_->throttler_manager->set_net_log(net_log_);
 735   // Always done in production, disabled only for unit tests.
 736   globals_->throttler_manager->set_enable_thread_checks(true);
 737
 738   globals_->proxy_script_fetcher_context.reset(
 739       ConstructProxyScriptFetcherContext(globals_, net_log_));
 740
 741 #if defined(OS_MACOSX) && !defined(OS_IOS)
 742   // Start observing Keychain events. This needs to be done on the UI thread,
 743   // as Keychain services requires a CFRunLoop.
 744   BrowserThread::PostTask(BrowserThread::UI,
 745                           FROM_HERE,
 746                           base::Bind(&ObserveKeychainEvents));
 747 #endif
 748
 749   // InitSystemRequestContext turns right around and posts a task back
 750   // to the IO thread, so we can't let it run until we know the IO
 751   // thread has started.
 752   //
 753   // Note that since we are at BrowserThread::Init time, the UI thread
 754   // is blocked waiting for the thread to start.  Therefore, posting
 755   // this task to the main thread's message loop here is guaranteed to
 756   // get it onto the message loop while the IOThread object still
 757   // exists.  However, the message might not be processed on the UI
 758   // thread until after IOThread is gone, so use a weak pointer.
 759   BrowserThread::PostTask(BrowserThread::UI,
 760                           FROM_HERE,
 761                           base::Bind(&IOThread::InitSystemRequestContext,
 762                                      weak_factory_.GetWeakPtr()));
 763 }
 764
 765 void IOThread::CleanUp() {
 766   base::debug::LeakTracker<SafeBrowsingURLRequestContext>::CheckForLeaks();
 767
 768 #if defined(USE_NSS) || defined(OS_IOS)
 769   net::ShutdownNSSHttpIO();
 770 #endif
 771
 772   system_url_request_context_getter_ = NULL;
 773
 774   // Release objects that the net::URLRequestContext could have been pointing
 775   // to.
 776
 777   // Shutdown the HistogramWatcher on the IO thread.
 778   net::NetworkChangeNotifier::ShutdownHistogramWatcher();
 779
 780   // This must be reset before the ChromeNetLog is destroyed.
 781   network_change_observer_.reset();
 782
 783   system_proxy_config_service_.reset();
 784
 785   delete globals_;
 786   globals_ = NULL;
 787
 788   base::debug::LeakTracker<SystemURLRequestContextGetter>::CheckForLeaks();
 789 }
 790
 791 void IOThread::InitializeNetworkOptions(const base::CommandLine& command_line) {
 792   // Only handle use-spdy command line flags if "spdy.disabled" preference is
 793   // not disabled via policy.
 794   if (is_spdy_disabled_by_policy_) {
 795     base::FieldTrial* trial = base::FieldTrialList::Find(kSpdyFieldTrialName);
 796     if (trial)
 797       trial->Disable();
 798   } else {
 799     if (command_line.HasSwitch(switches::kTrustedSpdyProxy)) {
 800       globals_->trusted_spdy_proxy.set(
 801           command_line.GetSwitchValueASCII(switches::kTrustedSpdyProxy));
 802     }
 803     if (command_line.HasSwitch(switches::kIgnoreUrlFetcherCertRequests))
 804       net::URLFetcher::SetIgnoreCertificateRequests(true);
 805
 806     if (command_line.HasSwitch(switches::kUseSpdy)) {
 807       std::string spdy_mode =
 808           command_line.GetSwitchValueASCII(switches::kUseSpdy);
 809       EnableSpdy(spdy_mode);
 810     } else if (command_line.HasSwitch(switches::kEnableSpdy4)) {
 811       globals_->next_protos = net::NextProtosSpdy4Http2();
 812       globals_->use_alternate_protocols.set(true);
 813     } else if (command_line.HasSwitch(switches::kEnableNpnHttpOnly)) {
 814       globals_->next_protos = net::NextProtosHttpOnly();
 815       globals_->use_alternate_protocols.set(false);
 816     } else {
 817       // No SPDY command-line flags have been specified. Examine trial groups.
 818       ConfigureSpdyFromTrial(
 819           base::FieldTrialList::FindFullName(kSpdyFieldTrialName), globals_);
 820     }
 821   }
 822
 823   ConfigureTCPFastOpen(command_line);
 824
 825   // TODO(rch): Make the client socket factory a per-network session
 826   // instance, constructed from a NetworkSession::Params, to allow us
 827   // to move this option to IOThread::Globals &
 828   // HttpNetworkSession::Params.
 829 }
 830
 831 void IOThread::ConfigureTCPFastOpen(const base::CommandLine& command_line) {
 832   const std::string trial_group =
 833       base::FieldTrialList::FindFullName(kTCPFastOpenFieldTrialName);
 834   if (trial_group == kTCPFastOpenHttpsEnabledGroupName)
 835     globals_->enable_tcp_fast_open_for_ssl.set(true);
 836   bool always_enable_if_supported =
 837       command_line.HasSwitch(switches::kEnableTcpFastOpen);
 838   // Check for OS support of TCP FastOpen, and turn it on for all connections
 839   // if indicated by user.
 840   net::CheckSupportAndMaybeEnableTCPFastOpen(always_enable_if_supported);
 841 }
 842
 843 void IOThread::ConfigureSpdyFromTrial(base::StringPiece spdy_trial_group,
 844                                       Globals* globals) {
 845   if (spdy_trial_group.starts_with(kSpdyFieldTrialHoldbackGroupNamePrefix)) {
 846     // TODO(jgraettinger): Use net::NextProtosHttpOnly() instead?
 847     net::HttpStreamFactory::set_spdy_enabled(false);
 848   } else if (spdy_trial_group == kSpdyFieldTrialHoldbackControlGroupName) {
 849     // Use the current SPDY default (SPDY/3.1).
 850     globals->next_protos = net::NextProtosSpdy31();
 851     globals->use_alternate_protocols.set(true);
 852   } else if (spdy_trial_group.starts_with(
 853                  kSpdyFieldTrialSpdy31GroupNamePrefix)) {
 854     globals->next_protos = net::NextProtosSpdy31();
 855     globals->use_alternate_protocols.set(true);
 856   } else if (spdy_trial_group.starts_with(
 857                  kSpdyFieldTrialSpdy4GroupNamePrefix)) {
 858     globals->next_protos = net::NextProtosSpdy4Http2();
 859     globals->use_alternate_protocols.set(true);
 860   } else if (spdy_trial_group == kSpdyFieldTrialSpdy4ControlGroupName) {
 861     // This control group is pinned at SPDY/3.1.
 862     globals->next_protos = net::NextProtosSpdy31();
 863     globals->use_alternate_protocols.set(true);
 864   } else {
 865     // By default, enable HTTP/2.
 866     globals->next_protos = net::NextProtosSpdy4Http2();
 867     globals->use_alternate_protocols.set(true);
 868   }
 869 }
 870
 871 void IOThread::EnableSpdy(const std::string& mode) {
 872   static const char kOff[] = "off";
 873   static const char kSSL[] = "ssl";
 874   static const char kDisableSSL[] = "no-ssl";
 875   static const char kDisablePing[] = "no-ping";
 876   static const char kExclude[] = "exclude";  // Hosts to exclude
 877   static const char kDisableCompression[] = "no-compress";
 878   static const char kDisableAltProtocols[] = "no-alt-protocols";
 879   static const char kForceAltProtocols[] = "force-alt-protocols";
 880   static const char kSingleDomain[] = "single-domain";
 881
 882   static const char kInitialMaxConcurrentStreams[] = "init-max-streams";
 883
 884   std::vector<std::string> spdy_options;
 885   base::SplitString(mode, ',', &spdy_options);
 886
 887   for (std::vector<std::string>::iterator it = spdy_options.begin();
 888        it != spdy_options.end(); ++it) {
 889     const std::string& element = *it;
 890     std::vector<std::string> name_value;
 891     base::SplitString(element, '=', &name_value);
 892     const std::string& option =
 893         name_value.size() > 0 ? name_value[0] : std::string();
 894     const std::string value =
 895         name_value.size() > 1 ? name_value[1] : std::string();
 896
 897     if (option == kOff) {
 898       net::HttpStreamFactory::set_spdy_enabled(false);
 899     } else if (option == kDisableSSL) {
 900       globals_->spdy_default_protocol.set(net::kProtoSPDY31);
 901       globals_->force_spdy_over_ssl.set(false);
 902       globals_->force_spdy_always.set(true);
 903     } else if (option == kSSL) {
 904       globals_->spdy_default_protocol.set(net::kProtoSPDY31);
 905       globals_->force_spdy_over_ssl.set(true);
 906       globals_->force_spdy_always.set(true);
 907     } else if (option == kDisablePing) {
 908       globals_->enable_spdy_ping_based_connection_checking.set(false);
 909     } else if (option == kExclude) {
 910       globals_->forced_spdy_exclusions.insert(
 911           net::HostPortPair::FromURL(GURL(value)));
 912     } else if (option == kDisableCompression) {
 913       globals_->enable_spdy_compression.set(false);
 914     } else if (option == kDisableAltProtocols) {
 915       globals_->use_alternate_protocols.set(false);
 916     } else if (option == kForceAltProtocols) {
 917       net::AlternateProtocolInfo pair(443, net::NPN_SPDY_3, 1);
 918       base::RecordAction(base::UserMetricsAction("Net.ForceAlternateProtocol"));
 919       net::HttpServerPropertiesImpl::ForceAlternateProtocol(pair);
 920     } else if (option == kSingleDomain) {
 921       DVLOG(1) << "FORCING SINGLE DOMAIN";
 922       globals_->force_spdy_single_domain.set(true);
 923     } else if (option == kInitialMaxConcurrentStreams) {
 924       int streams;
 925       if (base::StringToInt(value, &streams))
 926         globals_->initial_max_spdy_concurrent_streams.set(streams);
 927     } else if (option.empty() && it == spdy_options.begin()) {
 928       continue;
 929     } else {
 930       LOG(DFATAL) << "Unrecognized spdy option: " << option;
 931     }
 932   }
 933 }
 934
 935 // static
 936 void IOThread::RegisterPrefs(PrefRegistrySimple* registry) {
 937   registry->RegisterStringPref(prefs::kAuthSchemes,
 938                                "basic,digest,ntlm,negotiate,"
 939                                "spdyproxy");
 940   registry->RegisterBooleanPref(prefs::kDisableAuthNegotiateCnameLookup, false);
 941   registry->RegisterBooleanPref(prefs::kEnableAuthNegotiatePort, false);
 942   registry->RegisterStringPref(prefs::kAuthServerWhitelist, std::string());
 943   registry->RegisterStringPref(prefs::kAuthNegotiateDelegateWhitelist,
 944                                std::string());
 945   registry->RegisterStringPref(prefs::kGSSAPILibraryName, std::string());
 946   registry->RegisterStringPref(
 947       data_reduction_proxy::prefs::kDataReductionProxy, std::string());
 948   registry->RegisterBooleanPref(prefs::kEnableReferrers, true);
 949   data_reduction_proxy::RegisterPrefs(registry);
 950   registry->RegisterBooleanPref(prefs::kBuiltInDnsClientEnabled, true);
 951   registry->RegisterBooleanPref(prefs::kQuickCheckEnabled, true);
 952 }
 953
 954 net::HttpAuthHandlerFactory* IOThread::CreateDefaultAuthHandlerFactory(
 955     net::HostResolver* resolver) {
 956   net::HttpAuthFilterWhitelist* auth_filter_default_credentials = NULL;
 957   if (!auth_server_whitelist_.empty()) {
 958     auth_filter_default_credentials =
 959         new net::HttpAuthFilterWhitelist(auth_server_whitelist_);
 960   }
 961   net::HttpAuthFilterWhitelist* auth_filter_delegate = NULL;
 962   if (!auth_delegate_whitelist_.empty()) {
 963     auth_filter_delegate =
 964         new net::HttpAuthFilterWhitelist(auth_delegate_whitelist_);
 965   }
 966   globals_->url_security_manager.reset(
 967       net::URLSecurityManager::Create(auth_filter_default_credentials,
 968                                       auth_filter_delegate));
 969   std::vector<std::string> supported_schemes;
 970   base::SplitString(auth_schemes_, ',', &supported_schemes);
 971
 972   scoped_ptr<net::HttpAuthHandlerRegistryFactory> registry_factory(
 973       net::HttpAuthHandlerRegistryFactory::Create(
 974           supported_schemes, globals_->url_security_manager.get(),
 975           resolver, gssapi_library_name_, negotiate_disable_cname_lookup_,
 976           negotiate_enable_port_));
 977   return registry_factory.release();
 978 }
 979
 980 void IOThread::ClearHostCache() {
 981   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 982
 983   net::HostCache* host_cache = globals_->host_resolver->GetHostCache();
 984   if (host_cache)
 985     host_cache->clear();
 986 }
 987
 988 void IOThread::InitializeNetworkSessionParams(
 989     net::HttpNetworkSession::Params* params) {
 990   // TODO(michaeln): Remove ScopedTracker below once crbug.com/454983 is fixed.
 991   tracked_objects::ScopedTracker tracking_profile(
 992       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 993           "454983 IOThread::InitializeNetworkSessionParams"));
 994   InitializeNetworkSessionParamsFromGlobals(*globals_, params);
 995 }
 996
 997 // static
 998 void IOThread::InitializeNetworkSessionParamsFromGlobals(
 999     const IOThread::Globals& globals,
1000     net::HttpNetworkSession::Params* params) {
1001   params->host_resolver = globals.host_resolver.get();
1002   params->cert_verifier = globals.cert_verifier.get();
1003   params->cert_policy_enforcer = globals.cert_policy_enforcer.get();
1004   params->channel_id_service = globals.system_channel_id_service.get();
1005   params->transport_security_state = globals.transport_security_state.get();
1006   params->ssl_config_service = globals.ssl_config_service.get();
1007   params->http_auth_handler_factory = globals.http_auth_handler_factory.get();
1008   params->http_server_properties =
1009       globals.http_server_properties->GetWeakPtr();
1010   params->network_delegate = globals.system_network_delegate.get();
1011   params->host_mapping_rules = globals.host_mapping_rules.get();
1012   params->enable_ssl_connect_job_waiting =
1013       globals.enable_ssl_connect_job_waiting;
1014   params->ignore_certificate_errors = globals.ignore_certificate_errors;
1015   params->use_stale_while_revalidate = globals.use_stale_while_revalidate;
1016   params->testing_fixed_http_port = globals.testing_fixed_http_port;
1017   params->testing_fixed_https_port = globals.testing_fixed_https_port;
1018   globals.enable_tcp_fast_open_for_ssl.CopyToIfSet(
1019       &params->enable_tcp_fast_open_for_ssl);
1020
1021   globals.initial_max_spdy_concurrent_streams.CopyToIfSet(
1022       &params->spdy_initial_max_concurrent_streams);
1023   globals.force_spdy_single_domain.CopyToIfSet(
1024       &params->force_spdy_single_domain);
1025   globals.enable_spdy_compression.CopyToIfSet(
1026       &params->enable_spdy_compression);
1027   globals.enable_spdy_ping_based_connection_checking.CopyToIfSet(
1028       &params->enable_spdy_ping_based_connection_checking);
1029   globals.spdy_default_protocol.CopyToIfSet(
1030       &params->spdy_default_protocol);
1031   params->next_protos = globals.next_protos;
1032   globals.trusted_spdy_proxy.CopyToIfSet(&params->trusted_spdy_proxy);
1033   globals.force_spdy_over_ssl.CopyToIfSet(&params->force_spdy_over_ssl);
1034   globals.force_spdy_always.CopyToIfSet(&params->force_spdy_always);
1035   params->forced_spdy_exclusions = globals.forced_spdy_exclusions;
1036   globals.use_alternate_protocols.CopyToIfSet(
1037       &params->use_alternate_protocols);
1038   globals.alternate_protocol_probability_threshold.CopyToIfSet(
1039       &params->alternate_protocol_probability_threshold);
1040
1041   globals.enable_quic.CopyToIfSet(&params->enable_quic);
1042   globals.quic_always_require_handshake_confirmation.CopyToIfSet(
1043       &params->quic_always_require_handshake_confirmation);
1044   globals.quic_disable_connection_pooling.CopyToIfSet(
1045       &params->quic_disable_connection_pooling);
1046   globals.quic_load_server_info_timeout_ms.CopyToIfSet(
1047       &params->quic_load_server_info_timeout_ms);
1048   globals.quic_load_server_info_timeout_srtt_multiplier.CopyToIfSet(
1049       &params->quic_load_server_info_timeout_srtt_multiplier);
1050   globals.quic_enable_truncated_connection_ids.CopyToIfSet(
1051       &params->quic_enable_truncated_connection_ids);
1052   globals.quic_enable_connection_racing.CopyToIfSet(
1053       &params->quic_enable_connection_racing);
1054   globals.enable_quic_port_selection.CopyToIfSet(
1055       &params->enable_quic_port_selection);
1056   globals.quic_max_packet_length.CopyToIfSet(&params->quic_max_packet_length);
1057   globals.quic_user_agent_id.CopyToIfSet(&params->quic_user_agent_id);
1058   globals.quic_supported_versions.CopyToIfSet(
1059       &params->quic_supported_versions);
1060   params->quic_connection_options = globals.quic_connection_options;
1061
1062   globals.origin_to_force_quic_on.CopyToIfSet(
1063       &params->origin_to_force_quic_on);
1064   params->enable_user_alternate_protocol_ports =
1065       globals.enable_user_alternate_protocol_ports;
1066 }
1067
1068 base::TimeTicks IOThread::creation_time() const {
1069   return creation_time_;
1070 }
1071
1072 net::SSLConfigService* IOThread::GetSSLConfigService() {
1073   return ssl_config_service_manager_->Get();
1074 }
1075
1076 void IOThread::ChangedToOnTheRecordOnIOThread() {
1077   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
1078
1079   // Clear the host cache to avoid showing entries from the OTR session
1080   // in about:net-internals.
1081   ClearHostCache();
1082 }
1083
1084 void IOThread::InitSystemRequestContext() {
1085   if (system_url_request_context_getter_.get())
1086     return;
1087   // If we're in unit_tests, IOThread may not be run.
1088   if (!BrowserThread::IsMessageLoopValid(BrowserThread::IO))
1089     return;
1090   system_proxy_config_service_.reset(
1091       ProxyServiceFactory::CreateProxyConfigService(
1092           pref_proxy_config_tracker_.get()));
1093   system_url_request_context_getter_ =
1094       new SystemURLRequestContextGetter(this);
1095   // Safe to post an unretained this pointer, since IOThread is
1096   // guaranteed to outlive the IO BrowserThread.
1097   BrowserThread::PostTask(
1098       BrowserThread::IO,
1099       FROM_HERE,
1100       base::Bind(&IOThread::InitSystemRequestContextOnIOThread,
1101                  base::Unretained(this)));
1102 }
1103
1104 void IOThread::InitSystemRequestContextOnIOThread() {
1105   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
1106   DCHECK(!globals_->system_proxy_service.get());
1107   DCHECK(system_proxy_config_service_.get());
1108
1109   const base::CommandLine& command_line =
1110       *base::CommandLine::ForCurrentProcess();
1111   globals_->system_proxy_service.reset(
1112       ProxyServiceFactory::CreateProxyService(
1113           net_log_,
1114           globals_->proxy_script_fetcher_context.get(),
1115           globals_->system_network_delegate.get(),
1116           system_proxy_config_service_.release(),
1117           command_line,
1118           quick_check_enabled_.GetValue()));
1119
1120   net::HttpNetworkSession::Params system_params;
1121   InitializeNetworkSessionParams(&system_params);
1122   system_params.net_log = net_log_;
1123   system_params.proxy_service = globals_->system_proxy_service.get();
1124
1125   {
1126     // TODO(michaeln): Remove after crbug.com/454983 is fixed.
1127     tracked_objects::ScopedTracker tracking_profile(
1128         FROM_HERE_WITH_EXPLICIT_FUNCTION(
1129             "454983 IOThread::InitSystemRequestContextOnIOThread"
1130             ".HttpNetworkSession"));
1131     globals_->system_http_transaction_factory.reset(
1132         new net::HttpNetworkLayer(
1133             new net::HttpNetworkSession(system_params)));
1134   }
1135   globals_->system_url_request_job_factory.reset(
1136       new net::URLRequestJobFactoryImpl());
1137   globals_->system_request_context.reset(
1138       ConstructSystemRequestContext(globals_, net_log_));
1139   globals_->system_request_context->set_ssl_config_service(
1140       globals_->ssl_config_service.get());
1141   globals_->system_request_context->set_http_server_properties(
1142       globals_->http_server_properties->GetWeakPtr());
1143 }
1144
1145 void IOThread::UpdateDnsClientEnabled() {
1146   globals()->host_resolver->SetDnsClientEnabled(*dns_client_enabled_);
1147 }
1148
1149 void IOThread::ConfigureQuic(const base::CommandLine& command_line) {
1150   // Always fetch the field trial group to ensure it is reported correctly.
1151   // The command line flags will be associated with a group that is reported
1152   // so long as trial is actually queried.
1153   std::string group =
1154       base::FieldTrialList::FindFullName(kQuicFieldTrialName);
1155   VariationParameters params;
1156   if (!variations::GetVariationParams(kQuicFieldTrialName, &params)) {
1157     params.clear();
1158   }
1159
1160   ConfigureQuicGlobals(command_line, group, params, globals_);
1161 }
1162
1163 // static
1164 void IOThread::ConfigureQuicGlobals(
1165     const base::CommandLine& command_line,
1166     base::StringPiece quic_trial_group,
1167     const VariationParameters& quic_trial_params,
1168     IOThread::Globals* globals) {
1169   bool enable_quic = ShouldEnableQuic(command_line, quic_trial_group);
1170   globals->enable_quic.set(enable_quic);
1171   if (enable_quic) {
1172     globals->quic_always_require_handshake_confirmation.set(
1173         ShouldQuicAlwaysRequireHandshakeConfirmation(quic_trial_params));
1174     globals->quic_disable_connection_pooling.set(
1175         ShouldQuicDisableConnectionPooling(quic_trial_params));
1176     int load_server_info_timeout_ms =
1177         GetQuicLoadServerInfoTimeout(quic_trial_params);
1178     if (load_server_info_timeout_ms != 0) {
1179       globals->quic_load_server_info_timeout_ms.set(
1180           load_server_info_timeout_ms);
1181     }
1182     float load_server_info_timeout_srtt_multiplier =
1183         GetQuicLoadServerInfoTimeoutSrttMultiplier(quic_trial_params);
1184     globals->quic_enable_truncated_connection_ids.set(
1185         ShouldQuicEnableTruncatedConnectionIds(quic_trial_params));
1186     globals->quic_enable_connection_racing.set(
1187         ShouldQuicEnableConnectionRacing(quic_trial_params));
1188     if (load_server_info_timeout_srtt_multiplier != 0) {
1189       globals->quic_load_server_info_timeout_srtt_multiplier.set(
1190           load_server_info_timeout_srtt_multiplier);
1191     }
1192     globals->enable_quic_port_selection.set(
1193         ShouldEnableQuicPortSelection(command_line));
1194     globals->quic_connection_options =
1195         GetQuicConnectionOptions(command_line, quic_trial_params);
1196     if (ShouldEnableQuicPacing(command_line, quic_trial_params)) {
1197       globals->quic_connection_options.push_back(net::kPACE);
1198     }
1199   }
1200
1201   size_t max_packet_length = GetQuicMaxPacketLength(command_line,
1202                                                     quic_trial_params);
1203   if (max_packet_length != 0) {
1204     globals->quic_max_packet_length.set(max_packet_length);
1205   }
1206
1207   std::string quic_user_agent_id =
1208       chrome::VersionInfo::GetVersionStringModifier();
1209   if (!quic_user_agent_id.empty())
1210     quic_user_agent_id.push_back(' ');
1211   chrome::VersionInfo version_info;
1212   quic_user_agent_id.append(version_info.ProductNameAndVersionForUserAgent());
1213   globals->quic_user_agent_id.set(quic_user_agent_id);
1214
1215   net::QuicVersion version = GetQuicVersion(command_line, quic_trial_params);
1216   if (version != net::QUIC_VERSION_UNSUPPORTED) {
1217     net::QuicVersionVector supported_versions;
1218     supported_versions.push_back(version);
1219     globals->quic_supported_versions.set(supported_versions);
1220   }
1221
1222   double threshold =
1223       GetAlternateProtocolProbabilityThreshold(command_line, quic_trial_params);
1224   if (threshold >=0 && threshold <= 1) {
1225     globals->alternate_protocol_probability_threshold.set(threshold);
1226     globals->http_server_properties->SetAlternateProtocolProbabilityThreshold(
1227         threshold);
1228   }
1229
1230   if (command_line.HasSwitch(switches::kOriginToForceQuicOn)) {
1231     net::HostPortPair quic_origin =
1232         net::HostPortPair::FromString(
1233             command_line.GetSwitchValueASCII(switches::kOriginToForceQuicOn));
1234     if (!quic_origin.IsEmpty()) {
1235       globals->origin_to_force_quic_on.set(quic_origin);
1236     }
1237   }
1238 }
1239
1240 bool IOThread::ShouldEnableQuic(const base::CommandLine& command_line,
1241                                 base::StringPiece quic_trial_group) {
1242   if (command_line.HasSwitch(switches::kDisableQuic))
1243     return false;
1244
1245   if (command_line.HasSwitch(switches::kEnableQuic))
1246     return true;
1247
1248   return quic_trial_group.starts_with(kQuicFieldTrialEnabledGroupName) ||
1249       quic_trial_group.starts_with(kQuicFieldTrialHttpsEnabledGroupName);
1250 }
1251
1252 bool IOThread::ShouldEnableQuicPortSelection(
1253     const base::CommandLine& command_line) {
1254   if (command_line.HasSwitch(switches::kDisableQuicPortSelection))
1255     return false;
1256
1257   if (command_line.HasSwitch(switches::kEnableQuicPortSelection))
1258     return true;
1259
1260   return false;  // Default to disabling port selection on all channels.
1261 }
1262
1263 bool IOThread::ShouldEnableQuicPacing(
1264     const base::CommandLine& command_line,
1265     const VariationParameters& quic_trial_params) {
1266   if (command_line.HasSwitch(switches::kEnableQuicPacing))
1267     return true;
1268
1269   if (command_line.HasSwitch(switches::kDisableQuicPacing))
1270     return false;
1271
1272   return LowerCaseEqualsASCII(
1273       GetVariationParam(quic_trial_params, "enable_pacing"),
1274       "true");
1275 }
1276
1277 net::QuicTagVector IOThread::GetQuicConnectionOptions(
1278     const base::CommandLine& command_line,
1279     const VariationParameters& quic_trial_params) {
1280   if (command_line.HasSwitch(switches::kQuicConnectionOptions)) {
1281     return net::QuicUtils::ParseQuicConnectionOptions(
1282         command_line.GetSwitchValueASCII(switches::kQuicConnectionOptions));
1283   }
1284
1285   VariationParameters::const_iterator it =
1286       quic_trial_params.find("connection_options");
1287   if (it == quic_trial_params.end()) {
1288     return net::QuicTagVector();
1289   }
1290
1291   return net::QuicUtils::ParseQuicConnectionOptions(it->second);
1292 }
1293
1294 // static
1295 double IOThread::GetAlternateProtocolProbabilityThreshold(
1296     const base::CommandLine& command_line,
1297     const VariationParameters& quic_trial_params) {
1298   double value;
1299   if (command_line.HasSwitch(
1300           switches::kAlternateProtocolProbabilityThreshold)) {
1301     if (base::StringToDouble(
1302             command_line.GetSwitchValueASCII(
1303                 switches::kAlternateProtocolProbabilityThreshold),
1304             &value)) {
1305       return value;
1306     }
1307   }
1308   if (command_line.HasSwitch(switches::kEnableQuic)) {
1309     return 0;
1310   }
1311   if (base::StringToDouble(
1312           GetVariationParam(quic_trial_params,
1313                             "alternate_protocol_probability_threshold"),
1314           &value)) {
1315     return value;
1316   }
1317   return -1;
1318 }
1319
1320 // static
1321 bool IOThread::ShouldQuicAlwaysRequireHandshakeConfirmation(
1322     const VariationParameters& quic_trial_params) {
1323   return LowerCaseEqualsASCII(
1324       GetVariationParam(quic_trial_params,
1325                         "always_require_handshake_confirmation"),
1326       "true");
1327 }
1328
1329 // static
1330 bool IOThread::ShouldQuicDisableConnectionPooling(
1331     const VariationParameters& quic_trial_params) {
1332   return LowerCaseEqualsASCII(
1333       GetVariationParam(quic_trial_params, "disable_connection_pooling"),
1334       "true");
1335 }
1336
1337 // static
1338 int IOThread::GetQuicLoadServerInfoTimeout(
1339     const VariationParameters& quic_trial_params) {
1340   int value;
1341   if (base::StringToInt(GetVariationParam(quic_trial_params,
1342                                           "load_server_info_timeout"),
1343                         &value)) {
1344     return value;
1345   }
1346   return 0;
1347 }
1348
1349 // static
1350 float IOThread::GetQuicLoadServerInfoTimeoutSrttMultiplier(
1351     const VariationParameters& quic_trial_params) {
1352   double value;
1353   if (base::StringToDouble(GetVariationParam(quic_trial_params,
1354                                              "load_server_info_time_to_srtt"),
1355                            &value)) {
1356     return (float)value;
1357   }
1358   return 0.0f;
1359 }
1360
1361 // static
1362 bool IOThread::ShouldQuicEnableTruncatedConnectionIds(
1363     const VariationParameters& quic_trial_params) {
1364   return LowerCaseEqualsASCII(
1365       GetVariationParam(quic_trial_params, "enable_truncated_connection_ids"),
1366       "true");
1367 }
1368
1369 // static
1370 bool IOThread::ShouldQuicEnableConnectionRacing(
1371     const VariationParameters& quic_trial_params) {
1372   return LowerCaseEqualsASCII(
1373       GetVariationParam(quic_trial_params, "enable_connection_racing"),
1374       "true");
1375 }
1376
1377 // static
1378 size_t IOThread::GetQuicMaxPacketLength(
1379     const base::CommandLine& command_line,
1380     const VariationParameters& quic_trial_params) {
1381   if (command_line.HasSwitch(switches::kQuicMaxPacketLength)) {
1382     unsigned value;
1383     if (!base::StringToUint(
1384             command_line.GetSwitchValueASCII(switches::kQuicMaxPacketLength),
1385             &value)) {
1386       return 0;
1387     }
1388     return value;
1389   }
1390
1391   unsigned value;
1392   if (base::StringToUint(GetVariationParam(quic_trial_params,
1393                                            "max_packet_length"),
1394                          &value)) {
1395     return value;
1396   }
1397   return 0;
1398 }
1399
1400 // static
1401 net::QuicVersion IOThread::GetQuicVersion(
1402     const base::CommandLine& command_line,
1403     const VariationParameters& quic_trial_params) {
1404   if (command_line.HasSwitch(switches::kQuicVersion)) {
1405     return ParseQuicVersion(
1406         command_line.GetSwitchValueASCII(switches::kQuicVersion));
1407   }
1408
1409   return ParseQuicVersion(GetVariationParam(quic_trial_params, "quic_version"));
1410 }
1411
1412 // static
1413 net::QuicVersion IOThread::ParseQuicVersion(const std::string& quic_version) {
1414   net::QuicVersionVector supported_versions = net::QuicSupportedVersions();
1415   for (size_t i = 0; i < supported_versions.size(); ++i) {
1416     net::QuicVersion version = supported_versions[i];
1417     if (net::QuicVersionToString(version) == quic_version) {
1418       return version;
1419     }
1420   }
1421
1422   return net::QUIC_VERSION_UNSUPPORTED;
1423 }