net/quic/quic_config.cc

   1 // Copyright (c) 2013 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_config.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/logging.h"
  10 #include "net/quic/crypto/crypto_handshake_message.h"
  11 #include "net/quic/crypto/crypto_protocol.h"
  12 #include "net/quic/quic_utils.h"
  13
  14 using std::min;
  15 using std::string;
  16
  17 namespace net {
  18
  19 // Reads the value corresponding to |name_| from |msg| into |out|. If the
  20 // |name_| is absent in |msg| and |presence| is set to OPTIONAL |out| is set
  21 // to |default_value|.
  22 QuicErrorCode ReadUint32(const CryptoHandshakeMessage& msg,
  23                          QuicTag tag,
  24                          QuicConfigPresence presence,
  25                          uint32 default_value,
  26                          uint32* out,
  27                          string* error_details) {
  28   DCHECK(error_details != nullptr);
  29   QuicErrorCode error = msg.GetUint32(tag, out);
  30   switch (error) {
  31     case QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND:
  32       if (presence == PRESENCE_REQUIRED) {
  33         *error_details = "Missing " + QuicUtils::TagToString(tag);
  34         break;
  35       }
  36       error = QUIC_NO_ERROR;
  37       *out = default_value;
  38       break;
  39     case QUIC_NO_ERROR:
  40       break;
  41     default:
  42       *error_details = "Bad " + QuicUtils::TagToString(tag);
  43       break;
  44   }
  45   return error;
  46 }
  47
  48 QuicConfigValue::QuicConfigValue(QuicTag tag,
  49                                  QuicConfigPresence presence)
  50     : tag_(tag),
  51       presence_(presence) {
  52 }
  53 QuicConfigValue::~QuicConfigValue() {}
  54
  55 QuicNegotiableValue::QuicNegotiableValue(QuicTag tag,
  56                                          QuicConfigPresence presence)
  57     : QuicConfigValue(tag, presence),
  58       negotiated_(false) {
  59 }
  60 QuicNegotiableValue::~QuicNegotiableValue() {}
  61
  62 QuicNegotiableUint32::QuicNegotiableUint32(QuicTag tag,
  63                                            QuicConfigPresence presence)
  64     : QuicNegotiableValue(tag, presence),
  65       max_value_(0),
  66       default_value_(0),
  67       negotiated_value_(0) {
  68 }
  69 QuicNegotiableUint32::~QuicNegotiableUint32() {}
  70
  71 void QuicNegotiableUint32::set(uint32 max, uint32 default_value) {
  72   DCHECK_LE(default_value, max);
  73   max_value_ = max;
  74   default_value_ = default_value;
  75 }
  76
  77 uint32 QuicNegotiableUint32::GetUint32() const {
  78   if (negotiated()) {
  79     return negotiated_value_;
  80   }
  81   return default_value_;
  82 }
  83
  84 void QuicNegotiableUint32::ToHandshakeMessage(
  85     CryptoHandshakeMessage* out) const {
  86   if (negotiated()) {
  87     out->SetValue(tag_, negotiated_value_);
  88   } else {
  89     out->SetValue(tag_, max_value_);
  90   }
  91 }
  92
  93 QuicErrorCode QuicNegotiableUint32::ProcessPeerHello(
  94     const CryptoHandshakeMessage& peer_hello,
  95     HelloType hello_type,
  96     string* error_details) {
  97   DCHECK(!negotiated());
  98   DCHECK(error_details != nullptr);
  99   uint32 value;
 100   QuicErrorCode error = ReadUint32(peer_hello,
 101                                    tag_,
 102                                    presence_,
 103                                    default_value_,
 104                                    &value,
 105                                    error_details);
 106   if (error != QUIC_NO_ERROR) {
 107     return error;
 108   }
 109   if (hello_type == SERVER && value > max_value_) {
 110     *error_details =
 111         "Invalid value received for " + QuicUtils::TagToString(tag_);
 112     return QUIC_INVALID_NEGOTIATED_VALUE;
 113   }
 114
 115   set_negotiated(true);
 116   negotiated_value_ = min(value, max_value_);
 117   return QUIC_NO_ERROR;
 118 }
 119
 120 QuicNegotiableTag::QuicNegotiableTag(QuicTag tag, QuicConfigPresence presence)
 121     : QuicNegotiableValue(tag, presence),
 122       negotiated_tag_(0),
 123       default_value_(0) {
 124 }
 125
 126 QuicNegotiableTag::~QuicNegotiableTag() {}
 127
 128 void QuicNegotiableTag::set(const QuicTagVector& possible,
 129                             QuicTag default_value) {
 130   DCHECK(ContainsQuicTag(possible, default_value));
 131   possible_values_ = possible;
 132   default_value_ = default_value;
 133 }
 134
 135 void QuicNegotiableTag::ToHandshakeMessage(CryptoHandshakeMessage* out) const {
 136   if (negotiated()) {
 137     // Because of the way we serialize and parse handshake messages we can
 138     // serialize this as value and still parse it as a vector.
 139     out->SetValue(tag_, negotiated_tag_);
 140   } else {
 141     out->SetVector(tag_, possible_values_);
 142   }
 143 }
 144
 145 QuicErrorCode QuicNegotiableTag::ReadVector(
 146     const CryptoHandshakeMessage& msg,
 147     const QuicTag** out,
 148     size_t* out_length,
 149     string* error_details) const {
 150   DCHECK(error_details != nullptr);
 151   QuicErrorCode error = msg.GetTaglist(tag_, out, out_length);
 152   switch (error) {
 153     case QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND:
 154       if (presence_ == PRESENCE_REQUIRED) {
 155         *error_details = "Missing " + QuicUtils::TagToString(tag_);
 156         break;
 157       }
 158       error = QUIC_NO_ERROR;
 159       *out_length = 1;
 160       *out = &default_value_;
 161
 162     case QUIC_NO_ERROR:
 163       break;
 164     default:
 165       *error_details = "Bad " + QuicUtils::TagToString(tag_);
 166       break;
 167   }
 168   return error;
 169 }
 170
 171 QuicErrorCode QuicNegotiableTag::ProcessPeerHello(
 172     const CryptoHandshakeMessage& peer_hello,
 173     HelloType hello_type,
 174     string* error_details) {
 175   DCHECK(!negotiated());
 176   DCHECK(error_details != nullptr);
 177   const QuicTag* received_tags;
 178   size_t received_tags_length;
 179   QuicErrorCode error = ReadVector(peer_hello, &received_tags,
 180                                    &received_tags_length, error_details);
 181   if (error != QUIC_NO_ERROR) {
 182     return error;
 183   }
 184
 185   if (hello_type == SERVER) {
 186     if (received_tags_length != 1 ||
 187         !ContainsQuicTag(possible_values_,  *received_tags)) {
 188       *error_details = "Invalid " + QuicUtils::TagToString(tag_);
 189       return QUIC_INVALID_NEGOTIATED_VALUE;
 190     }
 191     negotiated_tag_ = *received_tags;
 192   } else {
 193     QuicTag negotiated_tag;
 194     if (!QuicUtils::FindMutualTag(possible_values_,
 195                                   received_tags,
 196                                   received_tags_length,
 197                                   QuicUtils::LOCAL_PRIORITY,
 198                                   &negotiated_tag,
 199                                   nullptr)) {
 200       *error_details = "Unsupported " + QuicUtils::TagToString(tag_);
 201       return QUIC_CRYPTO_MESSAGE_PARAMETER_NO_OVERLAP;
 202     }
 203     negotiated_tag_ = negotiated_tag;
 204   }
 205
 206   set_negotiated(true);
 207   return QUIC_NO_ERROR;
 208 }
 209
 210 QuicFixedUint32::QuicFixedUint32(QuicTag tag, QuicConfigPresence presence)
 211     : QuicConfigValue(tag, presence),
 212       has_send_value_(false),
 213       has_receive_value_(false) {
 214 }
 215 QuicFixedUint32::~QuicFixedUint32() {}
 216
 217 bool QuicFixedUint32::HasSendValue() const {
 218   return has_send_value_;
 219 }
 220
 221 uint32 QuicFixedUint32::GetSendValue() const {
 222   LOG_IF(DFATAL, !has_send_value_)
 223       << "No send value to get for tag:" << QuicUtils::TagToString(tag_);
 224   return send_value_;
 225 }
 226
 227 void QuicFixedUint32::SetSendValue(uint32 value) {
 228   has_send_value_ = true;
 229   send_value_ = value;
 230 }
 231
 232 bool QuicFixedUint32::HasReceivedValue() const {
 233   return has_receive_value_;
 234 }
 235
 236 uint32 QuicFixedUint32::GetReceivedValue() const {
 237   LOG_IF(DFATAL, !has_receive_value_)
 238       << "No receive value to get for tag:" << QuicUtils::TagToString(tag_);
 239   return receive_value_;
 240 }
 241
 242 void QuicFixedUint32::SetReceivedValue(uint32 value) {
 243   has_receive_value_ = true;
 244   receive_value_ = value;
 245 }
 246
 247 void QuicFixedUint32::ToHandshakeMessage(CryptoHandshakeMessage* out) const {
 248   if (has_send_value_) {
 249     out->SetValue(tag_, send_value_);
 250   }
 251 }
 252
 253 QuicErrorCode QuicFixedUint32::ProcessPeerHello(
 254     const CryptoHandshakeMessage& peer_hello,
 255     HelloType hello_type,
 256     string* error_details) {
 257   DCHECK(error_details != nullptr);
 258   QuicErrorCode error = peer_hello.GetUint32(tag_, &receive_value_);
 259   switch (error) {
 260     case QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND:
 261       if (presence_ == PRESENCE_OPTIONAL) {
 262         return QUIC_NO_ERROR;
 263       }
 264       *error_details = "Missing " + QuicUtils::TagToString(tag_);
 265       break;
 266     case QUIC_NO_ERROR:
 267       has_receive_value_ = true;
 268       break;
 269     default:
 270       *error_details = "Bad " + QuicUtils::TagToString(tag_);
 271       break;
 272   }
 273   return error;
 274 }
 275
 276 QuicFixedTagVector::QuicFixedTagVector(QuicTag name,
 277                                        QuicConfigPresence presence)
 278     : QuicConfigValue(name, presence),
 279       has_send_values_(false),
 280       has_receive_values_(false) {
 281 }
 282
 283 QuicFixedTagVector::~QuicFixedTagVector() {}
 284
 285 bool QuicFixedTagVector::HasSendValues() const {
 286   return has_send_values_;
 287 }
 288
 289 QuicTagVector QuicFixedTagVector::GetSendValues() const {
 290   LOG_IF(DFATAL, !has_send_values_)
 291       << "No send values to get for tag:" << QuicUtils::TagToString(tag_);
 292   return send_values_;
 293 }
 294
 295 void QuicFixedTagVector::SetSendValues(const QuicTagVector& values) {
 296   has_send_values_ = true;
 297   send_values_ = values;
 298 }
 299
 300 bool QuicFixedTagVector::HasReceivedValues() const {
 301   return has_receive_values_;
 302 }
 303
 304 QuicTagVector QuicFixedTagVector::GetReceivedValues() const {
 305   LOG_IF(DFATAL, !has_receive_values_)
 306       << "No receive value to get for tag:" << QuicUtils::TagToString(tag_);
 307   return receive_values_;
 308 }
 309
 310 void QuicFixedTagVector::SetReceivedValues(const QuicTagVector& values) {
 311   has_receive_values_ = true;
 312   receive_values_ = values;
 313 }
 314
 315 void QuicFixedTagVector::ToHandshakeMessage(CryptoHandshakeMessage* out) const {
 316   if (has_send_values_) {
 317     out->SetVector(tag_, send_values_);
 318   }
 319 }
 320
 321 QuicErrorCode QuicFixedTagVector::ProcessPeerHello(
 322     const CryptoHandshakeMessage& peer_hello,
 323     HelloType hello_type,
 324     string* error_details) {
 325   DCHECK(error_details != nullptr);
 326   const QuicTag* received_tags;
 327   size_t received_tags_length;
 328   QuicErrorCode error =
 329       peer_hello.GetTaglist(tag_, &received_tags, &received_tags_length);
 330   switch (error) {
 331     case QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND:
 332       if (presence_ == PRESENCE_OPTIONAL) {
 333         return QUIC_NO_ERROR;
 334       }
 335       *error_details = "Missing " + QuicUtils::TagToString(tag_);
 336       break;
 337     case QUIC_NO_ERROR:
 338       DVLOG(1) << "Received Connection Option tags from receiver.";
 339       has_receive_values_ = true;
 340       for (size_t i = 0; i < received_tags_length; ++i) {
 341         receive_values_.push_back(received_tags[i]);
 342       }
 343       break;
 344     default:
 345       *error_details = "Bad " + QuicUtils::TagToString(tag_);
 346       break;
 347   }
 348   return error;
 349 }
 350
 351 QuicConfig::QuicConfig()
 352     : max_time_before_crypto_handshake_(QuicTime::Delta::Zero()),
 353       max_idle_time_before_crypto_handshake_(QuicTime::Delta::Zero()),
 354       max_undecryptable_packets_(0),
 355       connection_options_(kCOPT, PRESENCE_OPTIONAL),
 356       idle_connection_state_lifetime_seconds_(kICSL, PRESENCE_REQUIRED),
 357       silent_close_(kSCLS, PRESENCE_OPTIONAL),
 358       max_streams_per_connection_(kMSPC, PRESENCE_REQUIRED),
 359       bytes_for_connection_id_(kTCID, PRESENCE_OPTIONAL),
 360       initial_round_trip_time_us_(kIRTT, PRESENCE_OPTIONAL),
 361       initial_stream_flow_control_window_bytes_(kSFCW, PRESENCE_OPTIONAL),
 362       initial_session_flow_control_window_bytes_(kCFCW, PRESENCE_OPTIONAL),
 363       socket_receive_buffer_(kSRBF, PRESENCE_OPTIONAL) {
 364   SetDefaults();
 365 }
 366
 367 QuicConfig::~QuicConfig() {}
 368
 369 void QuicConfig::SetConnectionOptionsToSend(
 370     const QuicTagVector& connection_options) {
 371   connection_options_.SetSendValues(connection_options);
 372 }
 373
 374 bool QuicConfig::HasReceivedConnectionOptions() const {
 375   return connection_options_.HasReceivedValues();
 376 }
 377
 378 QuicTagVector QuicConfig::ReceivedConnectionOptions() const {
 379   return connection_options_.GetReceivedValues();
 380 }
 381
 382 bool QuicConfig::HasSendConnectionOptions() const {
 383   return connection_options_.HasSendValues();
 384 }
 385
 386 QuicTagVector QuicConfig::SendConnectionOptions() const {
 387   return connection_options_.GetSendValues();
 388 }
 389
 390 bool QuicConfig::HasClientSentConnectionOption(QuicTag tag,
 391                                                Perspective perspective) const {
 392   if (perspective == Perspective::IS_SERVER) {
 393     if (HasReceivedConnectionOptions() &&
 394         ContainsQuicTag(ReceivedConnectionOptions(), tag)) {
 395       return true;
 396     }
 397   } else if (HasSendConnectionOptions() &&
 398              ContainsQuicTag(SendConnectionOptions(), tag)) {
 399     return true;
 400   }
 401   return false;
 402 }
 403
 404 void QuicConfig::SetIdleConnectionStateLifetime(
 405     QuicTime::Delta max_idle_connection_state_lifetime,
 406     QuicTime::Delta default_idle_conection_state_lifetime) {
 407   idle_connection_state_lifetime_seconds_.set(
 408       static_cast<uint32>(max_idle_connection_state_lifetime.ToSeconds()),
 409       static_cast<uint32>(default_idle_conection_state_lifetime.ToSeconds()));
 410 }
 411
 412 QuicTime::Delta QuicConfig::IdleConnectionStateLifetime() const {
 413   return QuicTime::Delta::FromSeconds(
 414       idle_connection_state_lifetime_seconds_.GetUint32());
 415 }
 416
 417 // TODO(ianswett) Use this for silent close on mobile, or delete.
 418 void QuicConfig::SetSilentClose(bool silent_close) {
 419   silent_close_.set(silent_close ? 1 : 0, silent_close ? 1 : 0);
 420 }
 421
 422 bool QuicConfig::SilentClose() const {
 423   return silent_close_.GetUint32() > 0;
 424 }
 425
 426 void QuicConfig::SetMaxStreamsPerConnection(size_t max_streams,
 427                                             size_t default_streams) {
 428   max_streams_per_connection_.set(max_streams, default_streams);
 429 }
 430
 431 uint32 QuicConfig::MaxStreamsPerConnection() const {
 432   return max_streams_per_connection_.GetUint32();
 433 }
 434
 435 bool QuicConfig::HasSetBytesForConnectionIdToSend() const {
 436   return bytes_for_connection_id_.HasSendValue();
 437 }
 438
 439 void QuicConfig::SetBytesForConnectionIdToSend(uint32 bytes) {
 440   bytes_for_connection_id_.SetSendValue(bytes);
 441 }
 442
 443 bool QuicConfig::HasReceivedBytesForConnectionId() const {
 444   return bytes_for_connection_id_.HasReceivedValue();
 445 }
 446
 447 uint32 QuicConfig::ReceivedBytesForConnectionId() const {
 448   return bytes_for_connection_id_.GetReceivedValue();
 449 }
 450
 451 void QuicConfig::SetInitialRoundTripTimeUsToSend(uint32 rtt) {
 452   initial_round_trip_time_us_.SetSendValue(rtt);
 453 }
 454
 455 bool QuicConfig::HasReceivedInitialRoundTripTimeUs() const {
 456   return initial_round_trip_time_us_.HasReceivedValue();
 457 }
 458
 459 uint32 QuicConfig::ReceivedInitialRoundTripTimeUs() const {
 460   return initial_round_trip_time_us_.GetReceivedValue();
 461 }
 462
 463 bool QuicConfig::HasInitialRoundTripTimeUsToSend() const {
 464   return initial_round_trip_time_us_.HasSendValue();
 465 }
 466
 467 uint32 QuicConfig::GetInitialRoundTripTimeUsToSend() const {
 468   return initial_round_trip_time_us_.GetSendValue();
 469 }
 470
 471 void QuicConfig::SetInitialStreamFlowControlWindowToSend(uint32 window_bytes) {
 472   if (window_bytes < kMinimumFlowControlSendWindow) {
 473     LOG(DFATAL) << "Initial stream flow control receive window ("
 474                 << window_bytes << ") cannot be set lower than default ("
 475                 << kMinimumFlowControlSendWindow << ").";
 476     window_bytes = kMinimumFlowControlSendWindow;
 477   }
 478   initial_stream_flow_control_window_bytes_.SetSendValue(window_bytes);
 479 }
 480
 481 uint32 QuicConfig::GetInitialStreamFlowControlWindowToSend() const {
 482   return initial_stream_flow_control_window_bytes_.GetSendValue();
 483 }
 484
 485 bool QuicConfig::HasReceivedInitialStreamFlowControlWindowBytes() const {
 486   return initial_stream_flow_control_window_bytes_.HasReceivedValue();
 487 }
 488
 489 uint32 QuicConfig::ReceivedInitialStreamFlowControlWindowBytes() const {
 490   return initial_stream_flow_control_window_bytes_.GetReceivedValue();
 491 }
 492
 493 void QuicConfig::SetInitialSessionFlowControlWindowToSend(uint32 window_bytes) {
 494   if (window_bytes < kMinimumFlowControlSendWindow) {
 495     LOG(DFATAL) << "Initial session flow control receive window ("
 496                 << window_bytes << ") cannot be set lower than default ("
 497                 << kMinimumFlowControlSendWindow << ").";
 498     window_bytes = kMinimumFlowControlSendWindow;
 499   }
 500   initial_session_flow_control_window_bytes_.SetSendValue(window_bytes);
 501 }
 502
 503 uint32 QuicConfig::GetInitialSessionFlowControlWindowToSend() const {
 504   return initial_session_flow_control_window_bytes_.GetSendValue();
 505 }
 506
 507 bool QuicConfig::HasReceivedInitialSessionFlowControlWindowBytes() const {
 508   return initial_session_flow_control_window_bytes_.HasReceivedValue();
 509 }
 510
 511 uint32 QuicConfig::ReceivedInitialSessionFlowControlWindowBytes() const {
 512   return initial_session_flow_control_window_bytes_.GetReceivedValue();
 513 }
 514
 515 void QuicConfig::SetSocketReceiveBufferToSend(uint32 tcp_receive_window) {
 516   socket_receive_buffer_.SetSendValue(tcp_receive_window);
 517 }
 518
 519 bool QuicConfig::HasReceivedSocketReceiveBuffer() const {
 520   return socket_receive_buffer_.HasReceivedValue();
 521 }
 522
 523 uint32 QuicConfig::ReceivedSocketReceiveBuffer() const {
 524   return socket_receive_buffer_.GetReceivedValue();
 525 }
 526
 527 bool QuicConfig::negotiated() const {
 528   // TODO(ianswett): Add the negotiated parameters once and iterate over all
 529   // of them in negotiated, ToHandshakeMessage, ProcessClientHello, and
 530   // ProcessServerHello.
 531   return idle_connection_state_lifetime_seconds_.negotiated() &&
 532          max_streams_per_connection_.negotiated();
 533 }
 534
 535 void QuicConfig::SetDefaults() {
 536   idle_connection_state_lifetime_seconds_.set(kMaximumIdleTimeoutSecs,
 537                                               kDefaultIdleTimeoutSecs);
 538   silent_close_.set(1, 0);
 539   SetMaxStreamsPerConnection(kDefaultMaxStreamsPerConnection,
 540                              kDefaultMaxStreamsPerConnection);
 541   max_time_before_crypto_handshake_ =
 542       QuicTime::Delta::FromSeconds(kMaxTimeForCryptoHandshakeSecs);
 543   max_idle_time_before_crypto_handshake_ =
 544       QuicTime::Delta::FromSeconds(kInitialIdleTimeoutSecs);
 545   max_undecryptable_packets_ = kDefaultMaxUndecryptablePackets;
 546
 547   SetInitialStreamFlowControlWindowToSend(kMinimumFlowControlSendWindow);
 548   SetInitialSessionFlowControlWindowToSend(kMinimumFlowControlSendWindow);
 549 }
 550
 551 void QuicConfig::ToHandshakeMessage(CryptoHandshakeMessage* out) const {
 552   idle_connection_state_lifetime_seconds_.ToHandshakeMessage(out);
 553   silent_close_.ToHandshakeMessage(out);
 554   max_streams_per_connection_.ToHandshakeMessage(out);
 555   bytes_for_connection_id_.ToHandshakeMessage(out);
 556   initial_round_trip_time_us_.ToHandshakeMessage(out);
 557   initial_stream_flow_control_window_bytes_.ToHandshakeMessage(out);
 558   initial_session_flow_control_window_bytes_.ToHandshakeMessage(out);
 559   socket_receive_buffer_.ToHandshakeMessage(out);
 560   connection_options_.ToHandshakeMessage(out);
 561 }
 562
 563 QuicErrorCode QuicConfig::ProcessPeerHello(
 564     const CryptoHandshakeMessage& peer_hello,
 565     HelloType hello_type,
 566     string* error_details) {
 567   DCHECK(error_details != nullptr);
 568
 569   QuicErrorCode error = QUIC_NO_ERROR;
 570   if (error == QUIC_NO_ERROR) {
 571     error = idle_connection_state_lifetime_seconds_.ProcessPeerHello(
 572         peer_hello, hello_type, error_details);
 573   }
 574   if (error == QUIC_NO_ERROR) {
 575     error =
 576         silent_close_.ProcessPeerHello(peer_hello, hello_type, error_details);
 577   }
 578   if (error == QUIC_NO_ERROR) {
 579     error = max_streams_per_connection_.ProcessPeerHello(
 580         peer_hello, hello_type, error_details);
 581   }
 582   if (error == QUIC_NO_ERROR) {
 583     error = bytes_for_connection_id_.ProcessPeerHello(
 584         peer_hello, hello_type, error_details);
 585   }
 586   if (error == QUIC_NO_ERROR) {
 587     error = initial_round_trip_time_us_.ProcessPeerHello(
 588         peer_hello, hello_type, error_details);
 589   }
 590   if (error == QUIC_NO_ERROR) {
 591     error = initial_stream_flow_control_window_bytes_.ProcessPeerHello(
 592         peer_hello, hello_type, error_details);
 593   }
 594   if (error == QUIC_NO_ERROR) {
 595     error = initial_session_flow_control_window_bytes_.ProcessPeerHello(
 596         peer_hello, hello_type, error_details);
 597   }
 598   if (error == QUIC_NO_ERROR) {
 599     error = socket_receive_buffer_.ProcessPeerHello(
 600         peer_hello, hello_type, error_details);
 601   }
 602   if (error == QUIC_NO_ERROR) {
 603     error = connection_options_.ProcessPeerHello(
 604         peer_hello, hello_type, error_details);
 605   }
 606   return error;
 607 }
 608
 609 }  // namespace net