net/quic/quic_stream_factory.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 "net/quic/quic_stream_factory.h"
   6
   7 #include <set>
   8
   9 #include "base/cpu.h"
  10 #include "base/message_loop/message_loop.h"
  11 #include "base/message_loop/message_loop_proxy.h"
  12 #include "base/metrics/field_trial.h"
  13 #include "base/metrics/histogram.h"
  14 #include "base/profiler/scoped_tracker.h"
  15 #include "base/rand_util.h"
  16 #include "base/stl_util.h"
  17 #include "base/strings/string_util.h"
  18 #include "base/values.h"
  19 #include "net/base/net_errors.h"
  20 #include "net/cert/cert_verifier.h"
  21 #include "net/dns/host_resolver.h"
  22 #include "net/dns/single_request_host_resolver.h"
  23 #include "net/http/http_server_properties.h"
  24 #include "net/quic/crypto/channel_id_chromium.h"
  25 #include "net/quic/crypto/proof_verifier_chromium.h"
  26 #include "net/quic/crypto/quic_random.h"
  27 #include "net/quic/crypto/quic_server_info.h"
  28 #include "net/quic/port_suggester.h"
  29 #include "net/quic/quic_client_session.h"
  30 #include "net/quic/quic_clock.h"
  31 #include "net/quic/quic_connection.h"
  32 #include "net/quic/quic_connection_helper.h"
  33 #include "net/quic/quic_crypto_client_stream_factory.h"
  34 #include "net/quic/quic_default_packet_writer.h"
  35 #include "net/quic/quic_flags.h"
  36 #include "net/quic/quic_http_stream.h"
  37 #include "net/quic/quic_protocol.h"
  38 #include "net/quic/quic_server_id.h"
  39 #include "net/socket/client_socket_factory.h"
  40 #include "net/udp/udp_client_socket.h"
  41
  42 #if defined(OS_WIN)
  43 #include "base/win/windows_version.h"
  44 #endif
  45
  46 namespace net {
  47
  48 namespace {
  49
  50 enum CreateSessionFailure {
  51   CREATION_ERROR_CONNECTING_SOCKET,
  52   CREATION_ERROR_SETTING_RECEIVE_BUFFER,
  53   CREATION_ERROR_SETTING_SEND_BUFFER,
  54   CREATION_ERROR_MAX
  55 };
  56
  57 // When a connection is idle for 30 seconds it will be closed.
  58 const int kIdleConnectionTimeoutSeconds = 30;
  59
  60 // The initial receive window size for both streams and sessions.
  61 const int32 kInitialReceiveWindowSize = 10 * 1024 * 1024;  // 10MB
  62
  63 // Set the maximum number of undecryptable packets the connection will store.
  64 const int32 kMaxUndecryptablePackets = 100;
  65
  66 void HistogramCreateSessionFailure(enum CreateSessionFailure error) {
  67   UMA_HISTOGRAM_ENUMERATION("Net.QuicSession.CreationError", error,
  68                             CREATION_ERROR_MAX);
  69 }
  70
  71 bool IsEcdsaSupported() {
  72 #if defined(OS_WIN)
  73   if (base::win::GetVersion() < base::win::VERSION_VISTA)
  74     return false;
  75 #endif
  76
  77   return true;
  78 }
  79
  80 QuicConfig InitializeQuicConfig(const QuicTagVector& connection_options) {
  81   QuicConfig config;
  82   config.SetIdleConnectionStateLifetime(
  83       QuicTime::Delta::FromSeconds(kIdleConnectionTimeoutSeconds),
  84       QuicTime::Delta::FromSeconds(kIdleConnectionTimeoutSeconds));
  85   config.SetConnectionOptionsToSend(connection_options);
  86   return config;
  87 }
  88
  89 class DefaultPacketWriterFactory : public QuicConnection::PacketWriterFactory {
  90  public:
  91   explicit DefaultPacketWriterFactory(DatagramClientSocket* socket)
  92       : socket_(socket) {}
  93   ~DefaultPacketWriterFactory() override {}
  94
  95   QuicPacketWriter* Create(QuicConnection* connection) const override;
  96
  97  private:
  98   DatagramClientSocket* socket_;
  99 };
 100
 101 QuicPacketWriter* DefaultPacketWriterFactory::Create(
 102     QuicConnection* connection) const {
 103   scoped_ptr<QuicDefaultPacketWriter> writer(
 104       new QuicDefaultPacketWriter(socket_));
 105   writer->SetConnection(connection);
 106   return writer.release();
 107 }
 108
 109 }  // namespace
 110
 111 QuicStreamFactory::IpAliasKey::IpAliasKey() {}
 112
 113 QuicStreamFactory::IpAliasKey::IpAliasKey(IPEndPoint ip_endpoint,
 114                                           bool is_https)
 115     : ip_endpoint(ip_endpoint),
 116       is_https(is_https) {}
 117
 118 QuicStreamFactory::IpAliasKey::~IpAliasKey() {}
 119
 120 bool QuicStreamFactory::IpAliasKey::operator<(
 121     const QuicStreamFactory::IpAliasKey& other) const {
 122   if (!(ip_endpoint == other.ip_endpoint)) {
 123     return ip_endpoint < other.ip_endpoint;
 124   }
 125   return is_https < other.is_https;
 126 }
 127
 128 bool QuicStreamFactory::IpAliasKey::operator==(
 129     const QuicStreamFactory::IpAliasKey& other) const {
 130   return is_https == other.is_https &&
 131       ip_endpoint == other.ip_endpoint;
 132 };
 133
 134 // Responsible for creating a new QUIC session to the specified server, and
 135 // for notifying any associated requests when complete.
 136 class QuicStreamFactory::Job {
 137  public:
 138   Job(QuicStreamFactory* factory,
 139       HostResolver* host_resolver,
 140       const HostPortPair& host_port_pair,
 141       bool is_https,
 142       bool was_alternate_protocol_recently_broken,
 143       PrivacyMode privacy_mode,
 144       bool is_post,
 145       QuicServerInfo* server_info,
 146       const BoundNetLog& net_log);
 147
 148   // Creates a new job to handle the resumption of for connecting an
 149   // existing session.
 150   Job(QuicStreamFactory* factory,
 151       HostResolver* host_resolver,
 152       QuicClientSession* session,
 153       QuicServerId server_id);
 154
 155   ~Job();
 156
 157   int Run(const CompletionCallback& callback);
 158
 159   int DoLoop(int rv);
 160   int DoResolveHost();
 161   int DoResolveHostComplete(int rv);
 162   int DoLoadServerInfo();
 163   int DoLoadServerInfoComplete(int rv);
 164   int DoConnect();
 165   int DoResumeConnect();
 166   int DoConnectComplete(int rv);
 167
 168   void OnIOComplete(int rv);
 169
 170   void RunAuxilaryJob();
 171
 172   void Cancel();
 173
 174   void CancelWaitForDataReadyCallback();
 175
 176   const QuicServerId server_id() const { return server_id_; }
 177
 178   base::WeakPtr<Job> GetWeakPtr() { return weak_factory_.GetWeakPtr(); }
 179
 180  private:
 181   enum IoState {
 182     STATE_NONE,
 183     STATE_RESOLVE_HOST,
 184     STATE_RESOLVE_HOST_COMPLETE,
 185     STATE_LOAD_SERVER_INFO,
 186     STATE_LOAD_SERVER_INFO_COMPLETE,
 187     STATE_CONNECT,
 188     STATE_RESUME_CONNECT,
 189     STATE_CONNECT_COMPLETE,
 190   };
 191   IoState io_state_;
 192
 193   QuicStreamFactory* factory_;
 194   SingleRequestHostResolver host_resolver_;
 195   QuicServerId server_id_;
 196   bool is_post_;
 197   bool was_alternate_protocol_recently_broken_;
 198   scoped_ptr<QuicServerInfo> server_info_;
 199   bool started_another_job_;
 200   const BoundNetLog net_log_;
 201   QuicClientSession* session_;
 202   CompletionCallback callback_;
 203   AddressList address_list_;
 204   base::TimeTicks dns_resolution_start_time_;
 205   base::TimeTicks dns_resolution_end_time_;
 206   base::WeakPtrFactory<Job> weak_factory_;
 207   DISALLOW_COPY_AND_ASSIGN(Job);
 208 };
 209
 210 QuicStreamFactory::Job::Job(QuicStreamFactory* factory,
 211                             HostResolver* host_resolver,
 212                             const HostPortPair& host_port_pair,
 213                             bool is_https,
 214                             bool was_alternate_protocol_recently_broken,
 215                             PrivacyMode privacy_mode,
 216                             bool is_post,
 217                             QuicServerInfo* server_info,
 218                             const BoundNetLog& net_log)
 219     : io_state_(STATE_RESOLVE_HOST),
 220       factory_(factory),
 221       host_resolver_(host_resolver),
 222       server_id_(host_port_pair, is_https, privacy_mode),
 223       is_post_(is_post),
 224       was_alternate_protocol_recently_broken_(
 225           was_alternate_protocol_recently_broken),
 226       server_info_(server_info),
 227       started_another_job_(false),
 228       net_log_(net_log),
 229       session_(nullptr),
 230       weak_factory_(this) {
 231 }
 232
 233 QuicStreamFactory::Job::Job(QuicStreamFactory* factory,
 234                             HostResolver* host_resolver,
 235                             QuicClientSession* session,
 236                             QuicServerId server_id)
 237     : io_state_(STATE_RESUME_CONNECT),
 238       factory_(factory),
 239       host_resolver_(host_resolver),  // unused
 240       server_id_(server_id),
 241       is_post_(false),                                 // unused
 242       was_alternate_protocol_recently_broken_(false),  // unused
 243       started_another_job_(false),                     // unused
 244       net_log_(session->net_log()),                    // unused
 245       session_(session),
 246       weak_factory_(this) {
 247 }
 248
 249 QuicStreamFactory::Job::~Job() {
 250   // If disk cache has a pending WaitForDataReadyCallback, cancel that callback.
 251   if (server_info_)
 252     server_info_->ResetWaitForDataReadyCallback();
 253 }
 254
 255 int QuicStreamFactory::Job::Run(const CompletionCallback& callback) {
 256   int rv = DoLoop(OK);
 257   if (rv == ERR_IO_PENDING)
 258     callback_ = callback;
 259
 260   return rv > 0 ? OK : rv;
 261 }
 262
 263 int QuicStreamFactory::Job::DoLoop(int rv) {
 264   do {
 265     IoState state = io_state_;
 266     io_state_ = STATE_NONE;
 267     switch (state) {
 268       case STATE_RESOLVE_HOST:
 269         CHECK_EQ(OK, rv);
 270         rv = DoResolveHost();
 271         break;
 272       case STATE_RESOLVE_HOST_COMPLETE:
 273         rv = DoResolveHostComplete(rv);
 274         break;
 275       case STATE_LOAD_SERVER_INFO:
 276         CHECK_EQ(OK, rv);
 277         rv = DoLoadServerInfo();
 278         break;
 279       case STATE_LOAD_SERVER_INFO_COMPLETE:
 280         rv = DoLoadServerInfoComplete(rv);
 281         break;
 282       case STATE_CONNECT:
 283         CHECK_EQ(OK, rv);
 284         rv = DoConnect();
 285         break;
 286       case STATE_RESUME_CONNECT:
 287         CHECK_EQ(OK, rv);
 288         rv = DoResumeConnect();
 289         break;
 290       case STATE_CONNECT_COMPLETE:
 291         rv = DoConnectComplete(rv);
 292         break;
 293       default:
 294         NOTREACHED() << "io_state_: " << io_state_;
 295         break;
 296     }
 297   } while (io_state_ != STATE_NONE && rv != ERR_IO_PENDING);
 298   return rv;
 299 }
 300
 301 void QuicStreamFactory::Job::OnIOComplete(int rv) {
 302   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
 303   tracked_objects::ScopedTracker tracking_profile1(
 304       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 305           "422516 QuicStreamFactory::Job::OnIOComplete1"));
 306
 307   rv = DoLoop(rv);
 308
 309   tracked_objects::ScopedTracker tracking_profile2(
 310       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 311           "422516 QuicStreamFactory::Job::OnIOComplete2"));
 312
 313   if (rv != ERR_IO_PENDING && !callback_.is_null()) {
 314     callback_.Run(rv);
 315   }
 316 }
 317
 318 void QuicStreamFactory::Job::RunAuxilaryJob() {
 319   int rv = Run(base::Bind(&QuicStreamFactory::OnJobComplete,
 320                           base::Unretained(factory_), this));
 321   if (rv != ERR_IO_PENDING)
 322     factory_->OnJobComplete(this, rv);
 323 }
 324
 325 void QuicStreamFactory::Job::Cancel() {
 326   callback_.Reset();
 327   if (session_)
 328     session_->connection()->SendConnectionClose(QUIC_CONNECTION_CANCELLED);
 329 }
 330
 331 void QuicStreamFactory::Job::CancelWaitForDataReadyCallback() {
 332   // If we are waiting for WaitForDataReadyCallback, then cancel the callback.
 333   if (io_state_ != STATE_LOAD_SERVER_INFO_COMPLETE)
 334     return;
 335   server_info_->CancelWaitForDataReadyCallback();
 336   OnIOComplete(OK);
 337 }
 338
 339 int QuicStreamFactory::Job::DoResolveHost() {
 340   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
 341   tracked_objects::ScopedTracker tracking_profile(
 342       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 343           "422516 QuicStreamFactory::Job::DoResolveHost"));
 344
 345   // Start loading the data now, and wait for it after we resolve the host.
 346   if (server_info_) {
 347     server_info_->Start();
 348   }
 349
 350   io_state_ = STATE_RESOLVE_HOST_COMPLETE;
 351   dns_resolution_start_time_ = base::TimeTicks::Now();
 352   return host_resolver_.Resolve(
 353       HostResolver::RequestInfo(server_id_.host_port_pair()), DEFAULT_PRIORITY,
 354       &address_list_,
 355       base::Bind(&QuicStreamFactory::Job::OnIOComplete, GetWeakPtr()),
 356       net_log_);
 357 }
 358
 359 int QuicStreamFactory::Job::DoResolveHostComplete(int rv) {
 360   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
 361   tracked_objects::ScopedTracker tracking_profile(
 362       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 363           "422516 QuicStreamFactory::Job::DoResolveHostComplete"));
 364
 365   dns_resolution_end_time_ = base::TimeTicks::Now();
 366   UMA_HISTOGRAM_TIMES("Net.QuicSession.HostResolutionTime",
 367                       dns_resolution_end_time_ - dns_resolution_start_time_);
 368   if (rv != OK)
 369     return rv;
 370
 371   DCHECK(!factory_->HasActiveSession(server_id_));
 372
 373   // Inform the factory of this resolution, which will set up
 374   // a session alias, if possible.
 375   if (factory_->OnResolution(server_id_, address_list_)) {
 376     return OK;
 377   }
 378
 379   if (server_info_)
 380     io_state_ = STATE_LOAD_SERVER_INFO;
 381   else
 382     io_state_ = STATE_CONNECT;
 383   return OK;
 384 }
 385
 386 int QuicStreamFactory::Job::DoLoadServerInfo() {
 387   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
 388   tracked_objects::ScopedTracker tracking_profile(
 389       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 390           "422516 QuicStreamFactory::Job::DoLoadServerInfo"));
 391
 392   io_state_ = STATE_LOAD_SERVER_INFO_COMPLETE;
 393
 394   DCHECK(server_info_);
 395
 396   // To mitigate the effects of disk cache taking too long to load QUIC server
 397   // information, set up a timer to cancel WaitForDataReady's callback.
 398   if (factory_->load_server_info_timeout_srtt_multiplier_ > 0) {
 399     int64 load_server_info_timeout_ms =
 400         (factory_->load_server_info_timeout_srtt_multiplier_ *
 401          factory_->GetServerNetworkStatsSmoothedRttInMicroseconds(server_id_)) /
 402         1000;
 403     if (load_server_info_timeout_ms > 0) {
 404       factory_->task_runner_->PostDelayedTask(
 405           FROM_HERE,
 406           base::Bind(&QuicStreamFactory::Job::CancelWaitForDataReadyCallback,
 407                      GetWeakPtr()),
 408           base::TimeDelta::FromMilliseconds(load_server_info_timeout_ms));
 409     }
 410   }
 411
 412   int rv = server_info_->WaitForDataReady(
 413       base::Bind(&QuicStreamFactory::Job::OnIOComplete, GetWeakPtr()));
 414   if (rv == ERR_IO_PENDING && factory_->enable_connection_racing()) {
 415     // If we are waiting to load server config from the disk cache, then start
 416     // another job.
 417     started_another_job_ = true;
 418     factory_->CreateAuxilaryJob(server_id_, is_post_, net_log_);
 419   }
 420   return rv;
 421 }
 422
 423 int QuicStreamFactory::Job::DoLoadServerInfoComplete(int rv) {
 424   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
 425   tracked_objects::ScopedTracker tracking_profile(
 426       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 427           "422516 QuicStreamFactory::Job::DoLoadServerInfoComplete"));
 428
 429   UMA_HISTOGRAM_TIMES("Net.QuicServerInfo.DiskCacheWaitForDataReadyTime",
 430                       base::TimeTicks::Now() - dns_resolution_end_time_);
 431
 432   if (rv != OK)
 433     server_info_.reset();
 434
 435   if (started_another_job_ &&
 436       (!server_info_ || server_info_->state().server_config.empty() ||
 437        !factory_->CryptoConfigCacheIsEmpty(server_id_))) {
 438     // If we have started another job and if we didn't load the server config
 439     // from the disk cache or if we have received a new server config from the
 440     // server, then cancel the current job.
 441     io_state_ = STATE_NONE;
 442     return ERR_CONNECTION_CLOSED;
 443   }
 444
 445   io_state_ = STATE_CONNECT;
 446   return OK;
 447 }
 448
 449 int QuicStreamFactory::Job::DoConnect() {
 450   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
 451   tracked_objects::ScopedTracker tracking_profile(
 452       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 453           "422516 QuicStreamFactory::Job::DoConnect"));
 454
 455   io_state_ = STATE_CONNECT_COMPLETE;
 456
 457   int rv =
 458       factory_->CreateSession(server_id_, server_info_.Pass(), address_list_,
 459                               dns_resolution_end_time_, net_log_, &session_);
 460   if (rv != OK) {
 461     DCHECK(rv != ERR_IO_PENDING);
 462     DCHECK(!session_);
 463     return rv;
 464   }
 465
 466   if (!session_->connection()->connected()) {
 467     return ERR_CONNECTION_CLOSED;
 468   }
 469
 470   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
 471   tracked_objects::ScopedTracker tracking_profile1(
 472       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 473           "422516 QuicStreamFactory::Job::DoConnect1"));
 474
 475   session_->StartReading();
 476   if (!session_->connection()->connected()) {
 477     return ERR_QUIC_PROTOCOL_ERROR;
 478   }
 479   bool require_confirmation =
 480       factory_->require_confirmation() || is_post_ ||
 481       was_alternate_protocol_recently_broken_;
 482
 483   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
 484   tracked_objects::ScopedTracker tracking_profile2(
 485       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 486           "422516 QuicStreamFactory::Job::DoConnect2"));
 487
 488   rv = session_->CryptoConnect(
 489       require_confirmation,
 490       base::Bind(&QuicStreamFactory::Job::OnIOComplete, GetWeakPtr()));
 491   return rv;
 492 }
 493
 494 int QuicStreamFactory::Job::DoResumeConnect() {
 495   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
 496   tracked_objects::ScopedTracker tracking_profile(
 497       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 498           "422516 QuicStreamFactory::Job::DoResumeConnect"));
 499
 500   io_state_ = STATE_CONNECT_COMPLETE;
 501
 502   int rv = session_->ResumeCryptoConnect(
 503       base::Bind(&QuicStreamFactory::Job::OnIOComplete, GetWeakPtr()));
 504
 505   return rv;
 506 }
 507
 508 int QuicStreamFactory::Job::DoConnectComplete(int rv) {
 509   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
 510   tracked_objects::ScopedTracker tracking_profile(
 511       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 512           "422516 QuicStreamFactory::Job::DoConnectComplete"));
 513
 514   if (rv != OK)
 515     return rv;
 516
 517   DCHECK(!factory_->HasActiveSession(server_id_));
 518   // There may well now be an active session for this IP.  If so, use the
 519   // existing session instead.
 520   AddressList address(session_->connection()->peer_address());
 521   if (factory_->OnResolution(server_id_, address)) {
 522     session_->connection()->SendConnectionClose(QUIC_CONNECTION_IP_POOLED);
 523     session_ = nullptr;
 524     return OK;
 525   }
 526
 527   factory_->ActivateSession(server_id_, session_);
 528
 529   return OK;
 530 }
 531
 532 QuicStreamRequest::QuicStreamRequest(QuicStreamFactory* factory)
 533     : factory_(factory) {}
 534
 535 QuicStreamRequest::~QuicStreamRequest() {
 536   if (factory_ && !callback_.is_null())
 537     factory_->CancelRequest(this);
 538 }
 539
 540 int QuicStreamRequest::Request(const HostPortPair& host_port_pair,
 541                                bool is_https,
 542                                PrivacyMode privacy_mode,
 543                                base::StringPiece method,
 544                                const BoundNetLog& net_log,
 545                                const CompletionCallback& callback) {
 546   DCHECK(!stream_);
 547   DCHECK(callback_.is_null());
 548   DCHECK(factory_);
 549   int rv = factory_->Create(host_port_pair, is_https, privacy_mode, method,
 550                             net_log, this);
 551   if (rv == ERR_IO_PENDING) {
 552     host_port_pair_ = host_port_pair;
 553     is_https_ = is_https;
 554     net_log_ = net_log;
 555     callback_ = callback;
 556   } else {
 557     factory_ = nullptr;
 558   }
 559   if (rv == OK)
 560     DCHECK(stream_);
 561   return rv;
 562 }
 563
 564 void QuicStreamRequest::set_stream(scoped_ptr<QuicHttpStream> stream) {
 565   DCHECK(stream);
 566   stream_ = stream.Pass();
 567 }
 568
 569 void QuicStreamRequest::OnRequestComplete(int rv) {
 570   factory_ = nullptr;
 571   callback_.Run(rv);
 572 }
 573
 574 scoped_ptr<QuicHttpStream> QuicStreamRequest::ReleaseStream() {
 575   DCHECK(stream_);
 576   return stream_.Pass();
 577 }
 578
 579 QuicStreamFactory::QuicStreamFactory(
 580     HostResolver* host_resolver,
 581     ClientSocketFactory* client_socket_factory,
 582     base::WeakPtr<HttpServerProperties> http_server_properties,
 583     CertVerifier* cert_verifier,
 584     ChannelIDService* channel_id_service,
 585     TransportSecurityState* transport_security_state,
 586     QuicCryptoClientStreamFactory* quic_crypto_client_stream_factory,
 587     QuicRandom* random_generator,
 588     QuicClock* clock,
 589     size_t max_packet_length,
 590     const std::string& user_agent_id,
 591     const QuicVersionVector& supported_versions,
 592     bool enable_port_selection,
 593     bool always_require_handshake_confirmation,
 594     bool disable_connection_pooling,
 595     float load_server_info_timeout_srtt_multiplier,
 596     bool enable_connection_racing,
 597     bool enable_non_blocking_io,
 598     bool disable_disk_cache,
 599     int socket_receive_buffer_size,
 600     const QuicTagVector& connection_options)
 601     : require_confirmation_(true),
 602       host_resolver_(host_resolver),
 603       client_socket_factory_(client_socket_factory),
 604       http_server_properties_(http_server_properties),
 605       transport_security_state_(transport_security_state),
 606       quic_server_info_factory_(nullptr),
 607       quic_crypto_client_stream_factory_(quic_crypto_client_stream_factory),
 608       random_generator_(random_generator),
 609       clock_(clock),
 610       max_packet_length_(max_packet_length),
 611       config_(InitializeQuicConfig(connection_options)),
 612       supported_versions_(supported_versions),
 613       enable_port_selection_(enable_port_selection),
 614       always_require_handshake_confirmation_(
 615           always_require_handshake_confirmation),
 616       disable_connection_pooling_(disable_connection_pooling),
 617       load_server_info_timeout_srtt_multiplier_(
 618           load_server_info_timeout_srtt_multiplier),
 619       enable_connection_racing_(enable_connection_racing),
 620       enable_non_blocking_io_(enable_non_blocking_io),
 621       disable_disk_cache_(disable_disk_cache),
 622       socket_receive_buffer_size_(socket_receive_buffer_size),
 623       port_seed_(random_generator_->RandUint64()),
 624       check_persisted_supports_quic_(true),
 625       task_runner_(nullptr),
 626       weak_factory_(this) {
 627   DCHECK(transport_security_state_);
 628   crypto_config_.set_user_agent_id(user_agent_id);
 629   crypto_config_.AddCanonicalSuffix(".c.youtube.com");
 630   crypto_config_.AddCanonicalSuffix(".googlevideo.com");
 631   crypto_config_.SetProofVerifier(
 632       new ProofVerifierChromium(cert_verifier, transport_security_state));
 633   crypto_config_.SetChannelIDSource(
 634       new ChannelIDSourceChromium(channel_id_service));
 635   base::CPU cpu;
 636   if (cpu.has_aesni() && cpu.has_avx())
 637     crypto_config_.PreferAesGcm();
 638   if (!IsEcdsaSupported())
 639     crypto_config_.DisableEcdsa();
 640 }
 641
 642 QuicStreamFactory::~QuicStreamFactory() {
 643   CloseAllSessions(ERR_ABORTED);
 644   while (!all_sessions_.empty()) {
 645     delete all_sessions_.begin()->first;
 646     all_sessions_.erase(all_sessions_.begin());
 647   }
 648   while (!active_jobs_.empty()) {
 649     const QuicServerId server_id = active_jobs_.begin()->first;
 650     STLDeleteElements(&(active_jobs_[server_id]));
 651     active_jobs_.erase(server_id);
 652   }
 653 }
 654
 655 void QuicStreamFactory::set_require_confirmation(bool require_confirmation) {
 656   require_confirmation_ = require_confirmation;
 657   if (http_server_properties_ && (!(local_address_ == IPEndPoint()))) {
 658     http_server_properties_->SetSupportsQuic(!require_confirmation,
 659                                              local_address_.address());
 660   }
 661 }
 662
 663 int QuicStreamFactory::Create(const HostPortPair& host_port_pair,
 664                               bool is_https,
 665                               PrivacyMode privacy_mode,
 666                               base::StringPiece method,
 667                               const BoundNetLog& net_log,
 668                               QuicStreamRequest* request) {
 669   QuicServerId server_id(host_port_pair, is_https, privacy_mode);
 670   if (HasActiveSession(server_id)) {
 671     request->set_stream(CreateIfSessionExists(server_id, net_log));
 672     return OK;
 673   }
 674
 675   if (HasActiveJob(server_id)) {
 676     active_requests_[request] = server_id;
 677     job_requests_map_[server_id].insert(request);
 678     return ERR_IO_PENDING;
 679   }
 680
 681   // TODO(rtenneti): |task_runner_| is used by the Job. Initialize task_runner_
 682   // in the constructor after WebRequestActionWithThreadsTest.* tests are fixed.
 683   if (!task_runner_)
 684     task_runner_ = base::MessageLoop::current()->message_loop_proxy().get();
 685
 686   QuicServerInfo* quic_server_info = nullptr;
 687   if (quic_server_info_factory_) {
 688     bool load_from_disk_cache = !disable_disk_cache_;
 689     if (http_server_properties_) {
 690       const AlternateProtocolMap& alternate_protocol_map =
 691           http_server_properties_->alternate_protocol_map();
 692       AlternateProtocolMap::const_iterator it =
 693           alternate_protocol_map.Peek(server_id.host_port_pair());
 694       if (it == alternate_protocol_map.end() || it->second.protocol != QUIC) {
 695         // If there is no entry for QUIC, consider that as a new server and
 696         // don't wait for Cache thread to load the data for that server.
 697         load_from_disk_cache = false;
 698       }
 699     }
 700     if (load_from_disk_cache && CryptoConfigCacheIsEmpty(server_id)) {
 701       quic_server_info = quic_server_info_factory_->GetForServer(server_id);
 702     }
 703   }
 704
 705   scoped_ptr<Job> job(new Job(this, host_resolver_, host_port_pair, is_https,
 706                               WasAlternateProtocolRecentlyBroken(server_id),
 707                               privacy_mode, method == "POST" /* is_post */,
 708                               quic_server_info, net_log));
 709   int rv = job->Run(base::Bind(&QuicStreamFactory::OnJobComplete,
 710                                base::Unretained(this), job.get()));
 711   if (rv == ERR_IO_PENDING) {
 712     active_requests_[request] = server_id;
 713     job_requests_map_[server_id].insert(request);
 714     active_jobs_[server_id].insert(job.release());
 715     return rv;
 716   }
 717   if (rv == OK) {
 718     DCHECK(HasActiveSession(server_id));
 719     request->set_stream(CreateIfSessionExists(server_id, net_log));
 720   }
 721   return rv;
 722 }
 723
 724 void QuicStreamFactory::CreateAuxilaryJob(const QuicServerId server_id,
 725                                           bool is_post,
 726                                           const BoundNetLog& net_log) {
 727   Job* aux_job = new Job(this, host_resolver_, server_id.host_port_pair(),
 728                          server_id.is_https(),
 729                          WasAlternateProtocolRecentlyBroken(server_id),
 730                          server_id.privacy_mode(), is_post, nullptr, net_log);
 731   active_jobs_[server_id].insert(aux_job);
 732   task_runner_->PostTask(FROM_HERE,
 733                          base::Bind(&QuicStreamFactory::Job::RunAuxilaryJob,
 734                                     aux_job->GetWeakPtr()));
 735 }
 736
 737 bool QuicStreamFactory::OnResolution(
 738     const QuicServerId& server_id,
 739     const AddressList& address_list) {
 740   DCHECK(!HasActiveSession(server_id));
 741   if (disable_connection_pooling_) {
 742     return false;
 743   }
 744   for (const IPEndPoint& address : address_list) {
 745     const IpAliasKey ip_alias_key(address, server_id.is_https());
 746     if (!ContainsKey(ip_aliases_, ip_alias_key))
 747       continue;
 748
 749     const SessionSet& sessions = ip_aliases_[ip_alias_key];
 750     for (QuicClientSession* session : sessions) {
 751       if (!session->CanPool(server_id.host(), server_id.privacy_mode()))
 752         continue;
 753       active_sessions_[server_id] = session;
 754       session_aliases_[session].insert(server_id);
 755       return true;
 756     }
 757   }
 758   return false;
 759 }
 760
 761 void QuicStreamFactory::OnJobComplete(Job* job, int rv) {
 762   QuicServerId server_id = job->server_id();
 763   if (rv != OK) {
 764     JobSet* jobs = &(active_jobs_[server_id]);
 765     if (jobs->size() > 1) {
 766       // If there is another pending job, then we can delete this job and let
 767       // the other job handle the request.
 768       job->Cancel();
 769       jobs->erase(job);
 770       delete job;
 771       return;
 772     }
 773   }
 774
 775   if (rv == OK) {
 776     // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
 777     tracked_objects::ScopedTracker tracking_profile1(
 778         FROM_HERE_WITH_EXPLICIT_FUNCTION(
 779             "422516 QuicStreamFactory::OnJobComplete1"));
 780
 781     if (!always_require_handshake_confirmation_)
 782       set_require_confirmation(false);
 783
 784     // Create all the streams, but do not notify them yet.
 785     for (QuicStreamRequest* request : job_requests_map_[server_id]) {
 786       DCHECK(HasActiveSession(server_id));
 787       request->set_stream(CreateIfSessionExists(server_id, request->net_log()));
 788     }
 789   }
 790
 791   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
 792   tracked_objects::ScopedTracker tracking_profile2(
 793       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 794           "422516 QuicStreamFactory::OnJobComplete2"));
 795
 796   while (!job_requests_map_[server_id].empty()) {
 797     RequestSet::iterator it = job_requests_map_[server_id].begin();
 798     QuicStreamRequest* request = *it;
 799     job_requests_map_[server_id].erase(it);
 800     active_requests_.erase(request);
 801     // Even though we're invoking callbacks here, we don't need to worry
 802     // about |this| being deleted, because the factory is owned by the
 803     // profile which can not be deleted via callbacks.
 804     request->OnRequestComplete(rv);
 805   }
 806
 807   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
 808   tracked_objects::ScopedTracker tracking_profile3(
 809       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 810           "422516 QuicStreamFactory::OnJobComplete3"));
 811
 812   for (Job* other_job : active_jobs_[server_id]) {
 813     if (other_job != job)
 814       other_job->Cancel();
 815   }
 816
 817   STLDeleteElements(&(active_jobs_[server_id]));
 818   active_jobs_.erase(server_id);
 819   job_requests_map_.erase(server_id);
 820 }
 821
 822 // Returns a newly created QuicHttpStream owned by the caller, if a
 823 // matching session already exists.  Returns nullptr otherwise.
 824 scoped_ptr<QuicHttpStream> QuicStreamFactory::CreateIfSessionExists(
 825     const QuicServerId& server_id,
 826     const BoundNetLog& net_log) {
 827   if (!HasActiveSession(server_id)) {
 828     DVLOG(1) << "No active session";
 829     return scoped_ptr<QuicHttpStream>();
 830   }
 831
 832   QuicClientSession* session = active_sessions_[server_id];
 833   DCHECK(session);
 834   return scoped_ptr<QuicHttpStream>(
 835       new QuicHttpStream(session->GetWeakPtr()));
 836 }
 837
 838 void QuicStreamFactory::OnIdleSession(QuicClientSession* session) {
 839 }
 840
 841 void QuicStreamFactory::OnSessionGoingAway(QuicClientSession* session) {
 842   const AliasSet& aliases = session_aliases_[session];
 843   for (AliasSet::const_iterator it = aliases.begin(); it != aliases.end();
 844        ++it) {
 845     DCHECK(active_sessions_.count(*it));
 846     DCHECK_EQ(session, active_sessions_[*it]);
 847     // Track sessions which have recently gone away so that we can disable
 848     // port suggestions.
 849     if (session->goaway_received()) {
 850       gone_away_aliases_.insert(*it);
 851     }
 852
 853     active_sessions_.erase(*it);
 854     ProcessGoingAwaySession(session, *it, true);
 855   }
 856   ProcessGoingAwaySession(session, all_sessions_[session], false);
 857   if (!aliases.empty()) {
 858     const IpAliasKey ip_alias_key(session->connection()->peer_address(),
 859                                   aliases.begin()->is_https());
 860     ip_aliases_[ip_alias_key].erase(session);
 861     if (ip_aliases_[ip_alias_key].empty()) {
 862       ip_aliases_.erase(ip_alias_key);
 863     }
 864   }
 865   session_aliases_.erase(session);
 866 }
 867
 868 void QuicStreamFactory::OnSessionClosed(QuicClientSession* session) {
 869   DCHECK_EQ(0u, session->GetNumOpenStreams());
 870   OnSessionGoingAway(session);
 871   delete session;
 872   all_sessions_.erase(session);
 873 }
 874
 875 void QuicStreamFactory::OnSessionConnectTimeout(
 876     QuicClientSession* session) {
 877   const AliasSet& aliases = session_aliases_[session];
 878   for (AliasSet::const_iterator it = aliases.begin(); it != aliases.end();
 879        ++it) {
 880     DCHECK(active_sessions_.count(*it));
 881     DCHECK_EQ(session, active_sessions_[*it]);
 882     active_sessions_.erase(*it);
 883   }
 884
 885   if (aliases.empty()) {
 886     return;
 887   }
 888
 889   const IpAliasKey ip_alias_key(session->connection()->peer_address(),
 890                                 aliases.begin()->is_https());
 891   ip_aliases_[ip_alias_key].erase(session);
 892   if (ip_aliases_[ip_alias_key].empty()) {
 893     ip_aliases_.erase(ip_alias_key);
 894   }
 895   QuicServerId server_id = *aliases.begin();
 896   session_aliases_.erase(session);
 897   Job* job = new Job(this, host_resolver_, session, server_id);
 898   active_jobs_[server_id].insert(job);
 899   int rv = job->Run(base::Bind(&QuicStreamFactory::OnJobComplete,
 900                                base::Unretained(this), job));
 901   DCHECK_EQ(ERR_IO_PENDING, rv);
 902 }
 903
 904 void QuicStreamFactory::CancelRequest(QuicStreamRequest* request) {
 905   DCHECK(ContainsKey(active_requests_, request));
 906   QuicServerId server_id = active_requests_[request];
 907   job_requests_map_[server_id].erase(request);
 908   active_requests_.erase(request);
 909 }
 910
 911 void QuicStreamFactory::CloseAllSessions(int error) {
 912   while (!active_sessions_.empty()) {
 913     size_t initial_size = active_sessions_.size();
 914     active_sessions_.begin()->second->CloseSessionOnError(error);
 915     DCHECK_NE(initial_size, active_sessions_.size());
 916   }
 917   while (!all_sessions_.empty()) {
 918     size_t initial_size = all_sessions_.size();
 919     all_sessions_.begin()->first->CloseSessionOnError(error);
 920     DCHECK_NE(initial_size, all_sessions_.size());
 921   }
 922   DCHECK(all_sessions_.empty());
 923 }
 924
 925 base::Value* QuicStreamFactory::QuicStreamFactoryInfoToValue() const {
 926   base::ListValue* list = new base::ListValue();
 927
 928   for (SessionMap::const_iterator it = active_sessions_.begin();
 929        it != active_sessions_.end(); ++it) {
 930     const QuicServerId& server_id = it->first;
 931     QuicClientSession* session = it->second;
 932     const AliasSet& aliases = session_aliases_.find(session)->second;
 933     // Only add a session to the list once.
 934     if (server_id == *aliases.begin()) {
 935       std::set<HostPortPair> hosts;
 936       for (AliasSet::const_iterator alias_it = aliases.begin();
 937            alias_it != aliases.end(); ++alias_it) {
 938         hosts.insert(alias_it->host_port_pair());
 939       }
 940       list->Append(session->GetInfoAsValue(hosts));
 941     }
 942   }
 943   return list;
 944 }
 945
 946 void QuicStreamFactory::ClearCachedStatesInCryptoConfig() {
 947   crypto_config_.ClearCachedStates();
 948 }
 949
 950 void QuicStreamFactory::OnIPAddressChanged() {
 951   CloseAllSessions(ERR_NETWORK_CHANGED);
 952   set_require_confirmation(true);
 953 }
 954
 955 void QuicStreamFactory::OnCertAdded(const X509Certificate* cert) {
 956   CloseAllSessions(ERR_CERT_DATABASE_CHANGED);
 957 }
 958
 959 void QuicStreamFactory::OnCACertChanged(const X509Certificate* cert) {
 960   // We should flush the sessions if we removed trust from a
 961   // cert, because a previously trusted server may have become
 962   // untrusted.
 963   //
 964   // We should not flush the sessions if we added trust to a cert.
 965   //
 966   // Since the OnCACertChanged method doesn't tell us what
 967   // kind of change it is, we have to flush the socket
 968   // pools to be safe.
 969   CloseAllSessions(ERR_CERT_DATABASE_CHANGED);
 970 }
 971
 972 bool QuicStreamFactory::HasActiveSession(
 973     const QuicServerId& server_id) const {
 974   return ContainsKey(active_sessions_, server_id);
 975 }
 976
 977 bool QuicStreamFactory::HasActiveJob(const QuicServerId& key) const {
 978   return ContainsKey(active_jobs_, key);
 979 }
 980
 981 int QuicStreamFactory::CreateSession(const QuicServerId& server_id,
 982                                      scoped_ptr<QuicServerInfo> server_info,
 983                                      const AddressList& address_list,
 984                                      base::TimeTicks dns_resolution_end_time,
 985                                      const BoundNetLog& net_log,
 986                                      QuicClientSession** session) {
 987   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
 988   tracked_objects::ScopedTracker tracking_profile1(
 989       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 990           "422516 QuicStreamFactory::CreateSession1"));
 991
 992   bool enable_port_selection = enable_port_selection_;
 993   if (enable_port_selection &&
 994       ContainsKey(gone_away_aliases_, server_id)) {
 995     // Disable port selection when the server is going away.
 996     // There is no point in trying to return to the same server, if
 997     // that server is no longer handling requests.
 998     enable_port_selection = false;
 999     gone_away_aliases_.erase(server_id);
1000   }
1001
1002   QuicConnectionId connection_id = random_generator_->RandUint64();
1003   IPEndPoint addr = *address_list.begin();
1004   scoped_refptr<PortSuggester> port_suggester =
1005       new PortSuggester(server_id.host_port_pair(), port_seed_);
1006   DatagramSocket::BindType bind_type = enable_port_selection ?
1007       DatagramSocket::RANDOM_BIND :  // Use our callback.
1008       DatagramSocket::DEFAULT_BIND;  // Use OS to randomize.
1009   scoped_ptr<DatagramClientSocket> socket(
1010       client_socket_factory_->CreateDatagramClientSocket(
1011           bind_type,
1012           base::Bind(&PortSuggester::SuggestPort, port_suggester),
1013           net_log.net_log(), net_log.source()));
1014
1015   if (enable_non_blocking_io_ &&
1016       client_socket_factory_ == ClientSocketFactory::GetDefaultFactory()) {
1017 #if defined(OS_WIN)
1018     static_cast<UDPClientSocket*>(socket.get())->UseNonBlockingIO();
1019 #endif
1020   }
1021
1022   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
1023   tracked_objects::ScopedTracker tracking_profile2(
1024       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1025           "422516 QuicStreamFactory::CreateSession2"));
1026
1027   int rv = socket->Connect(addr);
1028
1029   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
1030   tracked_objects::ScopedTracker tracking_profile3(
1031       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1032           "422516 QuicStreamFactory::CreateSession3"));
1033
1034   if (rv != OK) {
1035     HistogramCreateSessionFailure(CREATION_ERROR_CONNECTING_SOCKET);
1036     return rv;
1037   }
1038   UMA_HISTOGRAM_COUNTS("Net.QuicEphemeralPortsSuggested",
1039                        port_suggester->call_count());
1040   if (enable_port_selection) {
1041     DCHECK_LE(1u, port_suggester->call_count());
1042   } else {
1043     DCHECK_EQ(0u, port_suggester->call_count());
1044   }
1045
1046   rv = socket->SetReceiveBufferSize(socket_receive_buffer_size_);
1047   if (rv != OK) {
1048     HistogramCreateSessionFailure(CREATION_ERROR_SETTING_RECEIVE_BUFFER);
1049     return rv;
1050   }
1051   // Set a buffer large enough to contain the initial CWND's worth of packet
1052   // to work around the problem with CHLO packets being sent out with the
1053   // wrong encryption level, when the send buffer is full.
1054   rv = socket->SetSendBufferSize(kMaxPacketSize * 20);
1055   if (rv != OK) {
1056     HistogramCreateSessionFailure(CREATION_ERROR_SETTING_SEND_BUFFER);
1057     return rv;
1058   }
1059
1060   socket->GetLocalAddress(&local_address_);
1061   if (check_persisted_supports_quic_ && http_server_properties_) {
1062     check_persisted_supports_quic_ = false;
1063     IPAddressNumber last_address;
1064     if (http_server_properties_->GetSupportsQuic(&last_address) &&
1065         last_address == local_address_.address()) {
1066       require_confirmation_ = false;
1067     }
1068   }
1069
1070   DefaultPacketWriterFactory packet_writer_factory(socket.get());
1071
1072   if (!helper_.get()) {
1073     helper_.reset(new QuicConnectionHelper(
1074         base::MessageLoop::current()->message_loop_proxy().get(),
1075         clock_.get(), random_generator_));
1076   }
1077
1078   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
1079   tracked_objects::ScopedTracker tracking_profile4(
1080       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1081           "422516 QuicStreamFactory::CreateSession4"));
1082
1083   QuicConnection* connection = new QuicConnection(connection_id,
1084                                                   addr,
1085                                                   helper_.get(),
1086                                                   packet_writer_factory,
1087                                                   true  /* owns_writer */,
1088                                                   false  /* is_server */,
1089                                                   server_id.is_https(),
1090                                                   supported_versions_);
1091   connection->set_max_packet_length(max_packet_length_);
1092
1093   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
1094   tracked_objects::ScopedTracker tracking_profile5(
1095       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1096           "422516 QuicStreamFactory::CreateSession5"));
1097
1098   InitializeCachedStateInCryptoConfig(server_id, server_info);
1099
1100   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
1101   tracked_objects::ScopedTracker tracking_profile51(
1102       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1103           "422516 QuicStreamFactory::CreateSession51"));
1104
1105   QuicConfig config = config_;
1106
1107   config.SetSocketReceiveBufferToSend(socket_receive_buffer_size_);
1108
1109   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
1110   tracked_objects::ScopedTracker tracking_profile52(
1111       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1112           "422516 QuicStreamFactory::CreateSession52"));
1113
1114   config.set_max_undecryptable_packets(kMaxUndecryptablePackets);
1115
1116   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
1117   tracked_objects::ScopedTracker tracking_profile53(
1118       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1119           "422516 QuicStreamFactory::CreateSession53"));
1120
1121   config.SetInitialStreamFlowControlWindowToSend(kInitialReceiveWindowSize);
1122
1123   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
1124   tracked_objects::ScopedTracker tracking_profile54(
1125       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1126           "422516 QuicStreamFactory::CreateSession54"));
1127
1128   config.SetInitialSessionFlowControlWindowToSend(kInitialReceiveWindowSize);
1129
1130   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
1131   tracked_objects::ScopedTracker tracking_profile55(
1132       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1133           "422516 QuicStreamFactory::CreateSession55"));
1134
1135   int64 srtt = GetServerNetworkStatsSmoothedRttInMicroseconds(server_id);
1136
1137   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
1138   tracked_objects::ScopedTracker tracking_profile56(
1139       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1140           "422516 QuicStreamFactory::CreateSession56"));
1141
1142   if (srtt > 0)
1143     config.SetInitialRoundTripTimeUsToSend(static_cast<uint32>(srtt));
1144
1145   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
1146   tracked_objects::ScopedTracker tracking_profile57(
1147       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1148           "422516 QuicStreamFactory::CreateSession57"));
1149
1150   config.SetBytesForConnectionIdToSend(0);
1151
1152   if (quic_server_info_factory_ && !server_info) {
1153     // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
1154     tracked_objects::ScopedTracker tracking_profile6(
1155         FROM_HERE_WITH_EXPLICIT_FUNCTION(
1156             "422516 QuicStreamFactory::CreateSession6"));
1157
1158     // Start the disk cache loading so that we can persist the newer QUIC server
1159     // information and/or inform the disk cache that we have reused
1160     // |server_info|.
1161     server_info.reset(quic_server_info_factory_->GetForServer(server_id));
1162     server_info->Start();
1163   }
1164
1165   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
1166   tracked_objects::ScopedTracker tracking_profile61(
1167       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1168           "422516 QuicStreamFactory::CreateSession61"));
1169
1170   *session = new QuicClientSession(
1171       connection, socket.Pass(), this, transport_security_state_,
1172       server_info.Pass(), config, network_connection_.GetDescription(),
1173       dns_resolution_end_time,
1174       base::MessageLoop::current()->message_loop_proxy().get(),
1175       net_log.net_log());
1176
1177   // TODO(rtenneti): Remove ScopedTracker below once crbug.com/422516 is fixed.
1178   tracked_objects::ScopedTracker tracking_profile62(
1179       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1180           "422516 QuicStreamFactory::CreateSession62"));
1181
1182   all_sessions_[*session] = server_id;  // owning pointer
1183
1184   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
1185   tracked_objects::ScopedTracker tracking_profile7(
1186       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1187           "422516 QuicStreamFactory::CreateSession7"));
1188
1189   (*session)->InitializeSession(server_id,  &crypto_config_,
1190                                 quic_crypto_client_stream_factory_);
1191   bool closed_during_initialize =
1192       !ContainsKey(all_sessions_, *session) ||
1193       !(*session)->connection()->connected();
1194   UMA_HISTOGRAM_BOOLEAN("Net.QuicSession.ClosedDuringInitializeSession",
1195                         closed_during_initialize);
1196   if (closed_during_initialize) {
1197     DLOG(DFATAL) << "Session closed during initialize";
1198     *session = nullptr;
1199     return ERR_CONNECTION_CLOSED;
1200   }
1201   return OK;
1202 }
1203
1204 void QuicStreamFactory::ActivateSession(
1205     const QuicServerId& server_id,
1206     QuicClientSession* session) {
1207   DCHECK(!HasActiveSession(server_id));
1208   UMA_HISTOGRAM_COUNTS("Net.QuicActiveSessions", active_sessions_.size());
1209   active_sessions_[server_id] = session;
1210   session_aliases_[session].insert(server_id);
1211   const IpAliasKey ip_alias_key(session->connection()->peer_address(),
1212                                 server_id.is_https());
1213   DCHECK(!ContainsKey(ip_aliases_[ip_alias_key], session));
1214   ip_aliases_[ip_alias_key].insert(session);
1215 }
1216
1217 int64 QuicStreamFactory::GetServerNetworkStatsSmoothedRttInMicroseconds(
1218     const QuicServerId& server_id) const {
1219   if (!http_server_properties_)
1220     return 0;
1221   const ServerNetworkStats* stats =
1222       http_server_properties_->GetServerNetworkStats(
1223           server_id.host_port_pair());
1224   if (stats == nullptr)
1225     return 0;
1226   return stats->srtt.InMicroseconds();
1227 }
1228
1229 bool QuicStreamFactory::WasAlternateProtocolRecentlyBroken(
1230     const QuicServerId& server_id) const {
1231   return http_server_properties_ &&
1232          http_server_properties_->WasAlternateProtocolRecentlyBroken(
1233              server_id.host_port_pair());
1234 }
1235
1236 bool QuicStreamFactory::CryptoConfigCacheIsEmpty(
1237     const QuicServerId& server_id) {
1238   QuicCryptoClientConfig::CachedState* cached =
1239       crypto_config_.LookupOrCreate(server_id);
1240   return cached->IsEmpty();
1241 }
1242
1243 void QuicStreamFactory::InitializeCachedStateInCryptoConfig(
1244     const QuicServerId& server_id,
1245     const scoped_ptr<QuicServerInfo>& server_info) {
1246   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
1247   tracked_objects::ScopedTracker tracking_profile1(
1248       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1249           "422516 QuicStreamFactory::InitializeCachedStateInCryptoConfig1"));
1250
1251   // |server_info| will be NULL, if a non-empty server config already exists in
1252   // the memory cache. This is a minor optimization to avoid LookupOrCreate.
1253   if (!server_info)
1254     return;
1255
1256   QuicCryptoClientConfig::CachedState* cached =
1257       crypto_config_.LookupOrCreate(server_id);
1258   if (!cached->IsEmpty())
1259     return;
1260
1261   if (http_server_properties_) {
1262     if (quic_supported_servers_at_startup_.empty()) {
1263       for (const std::pair<const HostPortPair, AlternateProtocolInfo>&
1264                key_value : http_server_properties_->alternate_protocol_map()) {
1265         if (key_value.second.protocol == QUIC) {
1266           quic_supported_servers_at_startup_.insert(key_value.first);
1267         }
1268       }
1269     }
1270
1271     // TODO(rtenneti): Delete the following histogram after collecting stats.
1272     // If the AlternateProtocolMap contained an entry for this host, check if
1273     // the disk cache contained an entry for it.
1274     if (ContainsKey(quic_supported_servers_at_startup_,
1275                     server_id.host_port_pair())) {
1276       UMA_HISTOGRAM_BOOLEAN(
1277           "Net.QuicServerInfo.ExpectConfigMissingFromDiskCache",
1278           server_info->state().server_config.empty());
1279     }
1280   }
1281
1282   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
1283   tracked_objects::ScopedTracker tracking_profile2(
1284       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1285           "422516 QuicStreamFactory::InitializeCachedStateInCryptoConfig2"));
1286
1287   if (!cached->Initialize(server_info->state().server_config,
1288                           server_info->state().source_address_token,
1289                           server_info->state().certs,
1290                           server_info->state().server_config_sig,
1291                           clock_->WallNow()))
1292     return;
1293
1294   if (!server_id.is_https()) {
1295     // Don't check the certificates for insecure QUIC.
1296     cached->SetProofValid();
1297   }
1298 }
1299
1300 void QuicStreamFactory::ProcessGoingAwaySession(
1301     QuicClientSession* session,
1302     const QuicServerId& server_id,
1303     bool session_was_active) {
1304   if (!http_server_properties_)
1305     return;
1306
1307   const QuicConnectionStats& stats = session->connection()->GetStats();
1308   if (session->IsCryptoHandshakeConfirmed()) {
1309     ServerNetworkStats network_stats;
1310     network_stats.srtt = base::TimeDelta::FromMicroseconds(stats.srtt_us);
1311     network_stats.bandwidth_estimate = stats.estimated_bandwidth;
1312     http_server_properties_->SetServerNetworkStats(server_id.host_port_pair(),
1313                                                    network_stats);
1314     return;
1315   }
1316
1317   UMA_HISTOGRAM_COUNTS("Net.QuicHandshakeNotConfirmedNumPacketsReceived",
1318                        stats.packets_received);
1319
1320   if (!session_was_active)
1321     return;
1322
1323   const HostPortPair& server = server_id.host_port_pair();
1324   // Don't try to change the alternate-protocol state, if the
1325   // alternate-protocol state is unknown.
1326   const AlternateProtocolInfo alternate =
1327       http_server_properties_->GetAlternateProtocol(server);
1328   if (alternate.protocol == UNINITIALIZED_ALTERNATE_PROTOCOL)
1329     return;
1330
1331   // TODO(rch):  In the special case where the session has received no
1332   // packets from the peer, we should consider blacklisting this
1333   // differently so that we still race TCP but we don't consider the
1334   // session connected until the handshake has been confirmed.
1335   HistogramBrokenAlternateProtocolLocation(
1336       BROKEN_ALTERNATE_PROTOCOL_LOCATION_QUIC_STREAM_FACTORY);
1337   DCHECK_EQ(QUIC, alternate.protocol);
1338
1339   // Since the session was active, there's no longer an
1340   // HttpStreamFactoryImpl::Job running which can mark it broken, unless the
1341   // TCP job also fails. So to avoid not using QUIC when we otherwise could,
1342   // we mark it as broken, and then immediately re-enable it. This leaves
1343   // QUIC as "recently broken" which means that 0-RTT will be disabled but
1344   // we'll still race.
1345   http_server_properties_->SetBrokenAlternateProtocol(server);
1346   http_server_properties_->ClearAlternateProtocol(server);
1347   http_server_properties_->SetAlternateProtocol(
1348       server, alternate.port, alternate.protocol, 1);
1349   DCHECK_EQ(QUIC,
1350             http_server_properties_->GetAlternateProtocol(server).protocol);
1351   DCHECK(http_server_properties_->WasAlternateProtocolRecentlyBroken(
1352       server));
1353 }
1354
1355 }  // namespace net