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_flags.h"
  13 #include "net/quic/quic_utils.h"
  14
  15 using std::min;
  16 using std::string;
  17
  18 namespace net {
  19
  20 // Reads the value corresponding to |name_| from |msg| into |out|. If the
  21 // |name_| is absent in |msg| and |presence| is set to OPTIONAL |out| is set
  22 // to |default_value|.
  23 QuicErrorCode ReadUint32(const CryptoHandshakeMessage& msg,
  24                          QuicTag tag,
  25                          QuicConfigPresence presence,
  26                          uint32 default_value,
  27                          uint32* out,
  28                          string* error_details) {
  29   DCHECK(error_details != nullptr);
  30   QuicErrorCode error = msg.GetUint32(tag, out);
  31   switch (error) {
  32     case QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND:
  33       if (presence == PRESENCE_REQUIRED) {
  34         *error_details = "Missing " + QuicUtils::TagToString(tag);
  35         break;
  36       }
  37       error = QUIC_NO_ERROR;
  38       *out = default_value;
  39       break;
  40     case QUIC_NO_ERROR:
  41       break;
  42     default:
  43       *error_details = "Bad " + QuicUtils::TagToString(tag);
  44       break;
  45   }
  46   return error;
  47 }
  48
  49
  50 QuicConfigValue::QuicConfigValue(QuicTag tag,
  51                                  QuicConfigPresence presence)
  52     : tag_(tag),
  53       presence_(presence) {
  54 }
  55 QuicConfigValue::~QuicConfigValue() {}
  56
  57 QuicNegotiableValue::QuicNegotiableValue(QuicTag tag,
  58                                          QuicConfigPresence presence)
  59     : QuicConfigValue(tag, presence),
  60       negotiated_(false) {
  61 }
  62 QuicNegotiableValue::~QuicNegotiableValue() {}
  63
  64 QuicNegotiableUint32::QuicNegotiableUint32(QuicTag tag,
  65                                            QuicConfigPresence presence)
  66     : QuicNegotiableValue(tag, presence),
  67       max_value_(0),
  68       default_value_(0) {
  69 }
  70 QuicNegotiableUint32::~QuicNegotiableUint32() {}
  71
  72 void QuicNegotiableUint32::set(uint32 max, uint32 default_value) {
  73   DCHECK_LE(default_value, max);
  74   max_value_ = max;
  75   default_value_ = default_value;
  76 }
  77
  78 uint32 QuicNegotiableUint32::GetUint32() const {
  79   if (negotiated()) {
  80     return negotiated_value_;
  81   }
  82   return default_value_;
  83 }
  84
  85 void QuicNegotiableUint32::ToHandshakeMessage(
  86     CryptoHandshakeMessage* out) const {
  87   if (negotiated()) {
  88     out->SetValue(tag_, negotiated_value_);
  89   } else {
  90     out->SetValue(tag_, max_value_);
  91   }
  92 }
  93
  94 QuicErrorCode QuicNegotiableUint32::ProcessPeerHello(
  95     const CryptoHandshakeMessage& peer_hello,
  96     HelloType hello_type,
  97     string* error_details) {
  98   DCHECK(!negotiated());
  99   DCHECK(error_details != nullptr);
 100   uint32 value;
 101   QuicErrorCode error = ReadUint32(peer_hello,
 102                                    tag_,
 103                                    presence_,
 104                                    default_value_,
 105                                    &value,
 106                                    error_details);
 107   if (error != QUIC_NO_ERROR) {
 108     return error;
 109   }
 110   if (hello_type == SERVER && value > max_value_) {
 111     *error_details =
 112         "Invalid value received for " + QuicUtils::TagToString(tag_);
 113     return QUIC_INVALID_NEGOTIATED_VALUE;
 114   }
 115
 116   set_negotiated(true);
 117   negotiated_value_ = min(value, max_value_);
 118   return QUIC_NO_ERROR;
 119 }
 120
 121 QuicNegotiableTag::QuicNegotiableTag(QuicTag tag, QuicConfigPresence presence)
 122     : QuicNegotiableValue(tag, presence),
 123       negotiated_tag_(0),
 124       default_value_(0) {
 125 }
 126
 127 QuicNegotiableTag::~QuicNegotiableTag() {}
 128
 129 void QuicNegotiableTag::set(const QuicTagVector& possible,
 130                             QuicTag default_value) {
 131   DCHECK(ContainsQuicTag(possible, default_value));
 132   possible_values_ = possible;
 133   default_value_ = default_value;
 134 }
 135
 136 QuicTag QuicNegotiableTag::GetTag() const {
 137   if (negotiated()) {
 138     return negotiated_tag_;
 139   }
 140   return default_value_;
 141 }
 142
 143 void QuicNegotiableTag::ToHandshakeMessage(CryptoHandshakeMessage* out) const {
 144   if (negotiated()) {
 145     // Because of the way we serialize and parse handshake messages we can
 146     // serialize this as value and still parse it as a vector.
 147     out->SetValue(tag_, negotiated_tag_);
 148   } else {
 149     out->SetVector(tag_, possible_values_);
 150   }
 151 }
 152
 153 QuicErrorCode QuicNegotiableTag::ReadVector(
 154     const CryptoHandshakeMessage& msg,
 155     const QuicTag** out,
 156     size_t* out_length,
 157     string* error_details) const {
 158   DCHECK(error_details != nullptr);
 159   QuicErrorCode error = msg.GetTaglist(tag_, out, out_length);
 160   switch (error) {
 161     case QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND:
 162       if (presence_ == PRESENCE_REQUIRED) {
 163         *error_details = "Missing " + QuicUtils::TagToString(tag_);
 164         break;
 165       }
 166       error = QUIC_NO_ERROR;
 167       *out_length = 1;
 168       *out = &default_value_;
 169
 170     case QUIC_NO_ERROR:
 171       break;
 172     default:
 173       *error_details = "Bad " + QuicUtils::TagToString(tag_);
 174       break;
 175   }
 176   return error;
 177 }
 178
 179 QuicErrorCode QuicNegotiableTag::ProcessPeerHello(
 180     const CryptoHandshakeMessage& peer_hello,
 181     HelloType hello_type,
 182     string* error_details) {
 183   DCHECK(!negotiated());
 184   DCHECK(error_details != nullptr);
 185   const QuicTag* received_tags;
 186   size_t received_tags_length;
 187   QuicErrorCode error = ReadVector(peer_hello, &received_tags,
 188                                    &received_tags_length, error_details);
 189   if (error != QUIC_NO_ERROR) {
 190     return error;
 191   }
 192
 193   if (hello_type == SERVER) {
 194     if (received_tags_length != 1 ||
 195         !ContainsQuicTag(possible_values_,  *received_tags)) {
 196       *error_details = "Invalid " + QuicUtils::TagToString(tag_);
 197       return QUIC_INVALID_NEGOTIATED_VALUE;
 198     }
 199     negotiated_tag_ = *received_tags;
 200   } else {
 201     QuicTag negotiated_tag;
 202     if (!QuicUtils::FindMutualTag(possible_values_,
 203                                   received_tags,
 204                                   received_tags_length,
 205                                   QuicUtils::LOCAL_PRIORITY,
 206                                   &negotiated_tag,
 207                                   nullptr)) {
 208       *error_details = "Unsupported " + QuicUtils::TagToString(tag_);
 209       return QUIC_CRYPTO_MESSAGE_PARAMETER_NO_OVERLAP;
 210     }
 211     negotiated_tag_ = negotiated_tag;
 212   }
 213
 214   set_negotiated(true);
 215   return QUIC_NO_ERROR;
 216 }
 217
 218 QuicFixedUint32::QuicFixedUint32(QuicTag tag, QuicConfigPresence presence)
 219     : QuicConfigValue(tag, presence),
 220       has_send_value_(false),
 221       has_receive_value_(false) {
 222 }
 223 QuicFixedUint32::~QuicFixedUint32() {}
 224
 225 bool QuicFixedUint32::HasSendValue() const {
 226   return has_send_value_;
 227 }
 228
 229 uint32 QuicFixedUint32::GetSendValue() const {
 230   LOG_IF(DFATAL, !has_send_value_)
 231       << "No send value to get for tag:" << QuicUtils::TagToString(tag_);
 232   return send_value_;
 233 }
 234
 235 void QuicFixedUint32::SetSendValue(uint32 value) {
 236   has_send_value_ = true;
 237   send_value_ = value;
 238 }
 239
 240 bool QuicFixedUint32::HasReceivedValue() const {
 241   return has_receive_value_;
 242 }
 243
 244 uint32 QuicFixedUint32::GetReceivedValue() const {
 245   LOG_IF(DFATAL, !has_receive_value_)
 246       << "No receive value to get for tag:" << QuicUtils::TagToString(tag_);
 247   return receive_value_;
 248 }
 249
 250 void QuicFixedUint32::SetReceivedValue(uint32 value) {
 251   has_receive_value_ = true;
 252   receive_value_ = value;
 253 }
 254
 255 void QuicFixedUint32::ToHandshakeMessage(CryptoHandshakeMessage* out) const {
 256   if (has_send_value_) {
 257     out->SetValue(tag_, send_value_);
 258   }
 259 }
 260
 261 QuicErrorCode QuicFixedUint32::ProcessPeerHello(
 262     const CryptoHandshakeMessage& peer_hello,
 263     HelloType hello_type,
 264     string* error_details) {
 265   DCHECK(error_details != nullptr);
 266   QuicErrorCode error = peer_hello.GetUint32(tag_, &receive_value_);
 267   switch (error) {
 268     case QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND:
 269       if (presence_ == PRESENCE_OPTIONAL) {
 270         return QUIC_NO_ERROR;
 271       }
 272       *error_details = "Missing " + QuicUtils::TagToString(tag_);
 273       break;
 274     case QUIC_NO_ERROR:
 275       has_receive_value_ = true;
 276       break;
 277     default:
 278       *error_details = "Bad " + QuicUtils::TagToString(tag_);
 279       break;
 280   }
 281   return error;
 282 }
 283
 284 QuicFixedTag::QuicFixedTag(QuicTag name,
 285                            QuicConfigPresence presence)
 286     : QuicConfigValue(name, presence),
 287       has_send_value_(false),
 288       has_receive_value_(false) {
 289 }
 290
 291 QuicFixedTag::~QuicFixedTag() {}
 292
 293 bool QuicFixedTag::HasSendValue() const {
 294   return has_send_value_;
 295 }
 296
 297 uint32 QuicFixedTag::GetSendValue() const {
 298   LOG_IF(DFATAL, !has_send_value_)
 299       << "No send value to get for tag:" << QuicUtils::TagToString(tag_);
 300   return send_value_;
 301 }
 302
 303 void QuicFixedTag::SetSendValue(uint32 value) {
 304   has_send_value_ = true;
 305   send_value_ = value;
 306 }
 307
 308 bool QuicFixedTag::HasReceivedValue() const {
 309   return has_receive_value_;
 310 }
 311
 312 uint32 QuicFixedTag::GetReceivedValue() const {
 313   LOG_IF(DFATAL, !has_receive_value_)
 314       << "No receive value to get for tag:" << QuicUtils::TagToString(tag_);
 315   return receive_value_;
 316 }
 317
 318 void QuicFixedTag::SetReceivedValue(uint32 value) {
 319   has_receive_value_ = true;
 320   receive_value_ = value;
 321 }
 322
 323 void QuicFixedTag::ToHandshakeMessage(CryptoHandshakeMessage* out) const {
 324   if (has_send_value_) {
 325     out->SetValue(tag_, send_value_);
 326   }
 327 }
 328
 329 QuicErrorCode QuicFixedTag::ProcessPeerHello(
 330     const CryptoHandshakeMessage& peer_hello,
 331     HelloType hello_type,
 332     string* error_details) {
 333   DCHECK(error_details != nullptr);
 334   QuicErrorCode error = peer_hello.GetUint32(tag_, &receive_value_);
 335   switch (error) {
 336     case QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND:
 337       if (presence_ == PRESENCE_OPTIONAL) {
 338         return QUIC_NO_ERROR;
 339       }
 340       *error_details = "Missing " + QuicUtils::TagToString(tag_);
 341       break;
 342     case QUIC_NO_ERROR:
 343       has_receive_value_ = true;
 344       break;
 345     default:
 346       *error_details = "Bad " + QuicUtils::TagToString(tag_);
 347       break;
 348   }
 349   return error;
 350 }
 351
 352 QuicFixedTagVector::QuicFixedTagVector(QuicTag name,
 353                                        QuicConfigPresence presence)
 354     : QuicConfigValue(name, presence),
 355       has_send_values_(false),
 356       has_receive_values_(false) {
 357 }
 358
 359 QuicFixedTagVector::~QuicFixedTagVector() {}
 360
 361 bool QuicFixedTagVector::HasSendValues() const {
 362   return has_send_values_;
 363 }
 364
 365 QuicTagVector QuicFixedTagVector::GetSendValues() const {
 366   LOG_IF(DFATAL, !has_send_values_)
 367       << "No send values to get for tag:" << QuicUtils::TagToString(tag_);
 368   return send_values_;
 369 }
 370
 371 void QuicFixedTagVector::SetSendValues(const QuicTagVector& values) {
 372   has_send_values_ = true;
 373   send_values_ = values;
 374 }
 375
 376 bool QuicFixedTagVector::HasReceivedValues() const {
 377   return has_receive_values_;
 378 }
 379
 380 QuicTagVector QuicFixedTagVector::GetReceivedValues() const {
 381   LOG_IF(DFATAL, !has_receive_values_)
 382       << "No receive value to get for tag:" << QuicUtils::TagToString(tag_);
 383   return receive_values_;
 384 }
 385
 386 void QuicFixedTagVector::SetReceivedValues(const QuicTagVector& values) {
 387   has_receive_values_ = true;
 388   receive_values_ = values;
 389 }
 390
 391 void QuicFixedTagVector::ToHandshakeMessage(CryptoHandshakeMessage* out) const {
 392   if (has_send_values_) {
 393     out->SetVector(tag_, send_values_);
 394   }
 395 }
 396
 397 QuicErrorCode QuicFixedTagVector::ProcessPeerHello(
 398     const CryptoHandshakeMessage& peer_hello,
 399     HelloType hello_type,
 400     string* error_details) {
 401   DCHECK(error_details != nullptr);
 402   const QuicTag* received_tags;
 403   size_t received_tags_length;
 404   QuicErrorCode error =
 405       peer_hello.GetTaglist(tag_, &received_tags, &received_tags_length);
 406   switch (error) {
 407     case QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND:
 408       if (presence_ == PRESENCE_OPTIONAL) {
 409         return QUIC_NO_ERROR;
 410       }
 411       *error_details = "Missing " + QuicUtils::TagToString(tag_);
 412       break;
 413     case QUIC_NO_ERROR:
 414       DVLOG(1) << "Received Connection Option tags from receiver.";
 415       has_receive_values_ = true;
 416       for (size_t i = 0; i < received_tags_length; ++i) {
 417         receive_values_.push_back(received_tags[i]);
 418       }
 419       break;
 420     default:
 421       *error_details = "Bad " + QuicUtils::TagToString(tag_);
 422       break;
 423   }
 424   return error;
 425 }
 426
 427 QuicConfig::QuicConfig()
 428     : max_time_before_crypto_handshake_(QuicTime::Delta::Zero()),
 429       max_idle_time_before_crypto_handshake_(QuicTime::Delta::Zero()),
 430       max_undecryptable_packets_(0),
 431       congestion_feedback_(kCGST, PRESENCE_OPTIONAL),
 432       connection_options_(kCOPT, PRESENCE_OPTIONAL),
 433       idle_connection_state_lifetime_seconds_(kICSL, PRESENCE_REQUIRED),
 434       silent_close_(kSCLS, PRESENCE_OPTIONAL),
 435       max_streams_per_connection_(kMSPC, PRESENCE_REQUIRED),
 436       bytes_for_connection_id_(kTCID, PRESENCE_OPTIONAL),
 437       initial_round_trip_time_us_(kIRTT, PRESENCE_OPTIONAL),
 438       initial_stream_flow_control_window_bytes_(kSFCW, PRESENCE_OPTIONAL),
 439       initial_session_flow_control_window_bytes_(kCFCW, PRESENCE_OPTIONAL),
 440       socket_receive_buffer_(kSRBF, PRESENCE_OPTIONAL) {
 441   SetDefaults();
 442 }
 443
 444 QuicConfig::~QuicConfig() {}
 445
 446 void QuicConfig::SetConnectionOptionsToSend(
 447     const QuicTagVector& connection_options) {
 448   connection_options_.SetSendValues(connection_options);
 449 }
 450
 451 bool QuicConfig::HasReceivedConnectionOptions() const {
 452   return connection_options_.HasReceivedValues();
 453 }
 454
 455 QuicTagVector QuicConfig::ReceivedConnectionOptions() const {
 456   return connection_options_.GetReceivedValues();
 457 }
 458
 459 bool QuicConfig::HasSendConnectionOptions() const {
 460   return connection_options_.HasSendValues();
 461 }
 462
 463 QuicTagVector QuicConfig::SendConnectionOptions() const {
 464   return connection_options_.GetSendValues();
 465 }
 466
 467 void QuicConfig::SetIdleConnectionStateLifetime(
 468     QuicTime::Delta max_idle_connection_state_lifetime,
 469     QuicTime::Delta default_idle_conection_state_lifetime) {
 470   idle_connection_state_lifetime_seconds_.set(
 471       static_cast<uint32>(max_idle_connection_state_lifetime.ToSeconds()),
 472       static_cast<uint32>(default_idle_conection_state_lifetime.ToSeconds()));
 473 }
 474
 475 QuicTime::Delta QuicConfig::IdleConnectionStateLifetime() const {
 476   return QuicTime::Delta::FromSeconds(
 477       idle_connection_state_lifetime_seconds_.GetUint32());
 478 }
 479
 480 void QuicConfig::SetSilentClose(bool silent_close) {
 481   silent_close_.set(silent_close ? 1 : 0, silent_close ? 1 : 0);
 482 }
 483
 484 bool QuicConfig::SilentClose() const {
 485   return silent_close_.GetUint32() > 0;
 486 }
 487
 488 void QuicConfig::SetMaxStreamsPerConnection(size_t max_streams,
 489                                             size_t default_streams) {
 490   max_streams_per_connection_.set(max_streams, default_streams);
 491 }
 492
 493 uint32 QuicConfig::MaxStreamsPerConnection() const {
 494   return max_streams_per_connection_.GetUint32();
 495 }
 496
 497 bool QuicConfig::HasSetBytesForConnectionIdToSend() const {
 498   return bytes_for_connection_id_.HasSendValue();
 499 }
 500
 501 void QuicConfig::SetBytesForConnectionIdToSend(uint32 bytes) {
 502   bytes_for_connection_id_.SetSendValue(bytes);
 503 }
 504
 505 bool QuicConfig::HasReceivedBytesForConnectionId() const {
 506   return bytes_for_connection_id_.HasReceivedValue();
 507 }
 508
 509 uint32 QuicConfig::ReceivedBytesForConnectionId() const {
 510   return bytes_for_connection_id_.GetReceivedValue();
 511 }
 512
 513 void QuicConfig::SetInitialRoundTripTimeUsToSend(uint32 rtt) {
 514   initial_round_trip_time_us_.SetSendValue(rtt);
 515 }
 516
 517 bool QuicConfig::HasReceivedInitialRoundTripTimeUs() const {
 518   return initial_round_trip_time_us_.HasReceivedValue();
 519 }
 520
 521 uint32 QuicConfig::ReceivedInitialRoundTripTimeUs() const {
 522   return initial_round_trip_time_us_.GetReceivedValue();
 523 }
 524
 525 bool QuicConfig::HasInitialRoundTripTimeUsToSend() const {
 526   return initial_round_trip_time_us_.HasSendValue();
 527 }
 528
 529 uint32 QuicConfig::GetInitialRoundTripTimeUsToSend() const {
 530   return initial_round_trip_time_us_.GetSendValue();
 531 }
 532
 533 void QuicConfig::SetInitialStreamFlowControlWindowToSend(uint32 window_bytes) {
 534   if (window_bytes < kMinimumFlowControlSendWindow) {
 535     LOG(DFATAL) << "Initial stream flow control receive window ("
 536                 << window_bytes << ") cannot be set lower than default ("
 537                 << kMinimumFlowControlSendWindow << ").";
 538     window_bytes = kMinimumFlowControlSendWindow;
 539   }
 540   initial_stream_flow_control_window_bytes_.SetSendValue(window_bytes);
 541 }
 542
 543 uint32 QuicConfig::GetInitialStreamFlowControlWindowToSend() const {
 544   return initial_stream_flow_control_window_bytes_.GetSendValue();
 545 }
 546
 547 bool QuicConfig::HasReceivedInitialStreamFlowControlWindowBytes() const {
 548   return initial_stream_flow_control_window_bytes_.HasReceivedValue();
 549 }
 550
 551 uint32 QuicConfig::ReceivedInitialStreamFlowControlWindowBytes() const {
 552   return initial_stream_flow_control_window_bytes_.GetReceivedValue();
 553 }
 554
 555 void QuicConfig::SetInitialSessionFlowControlWindowToSend(uint32 window_bytes) {
 556   if (window_bytes < kMinimumFlowControlSendWindow) {
 557     LOG(DFATAL) << "Initial session flow control receive window ("
 558                 << window_bytes << ") cannot be set lower than default ("
 559                 << kMinimumFlowControlSendWindow << ").";
 560     window_bytes = kMinimumFlowControlSendWindow;
 561   }
 562   initial_session_flow_control_window_bytes_.SetSendValue(window_bytes);
 563 }
 564
 565 uint32 QuicConfig::GetInitialSessionFlowControlWindowToSend() const {
 566   return initial_session_flow_control_window_bytes_.GetSendValue();
 567 }
 568
 569 bool QuicConfig::HasReceivedInitialSessionFlowControlWindowBytes() const {
 570   return initial_session_flow_control_window_bytes_.HasReceivedValue();
 571 }
 572
 573 uint32 QuicConfig::ReceivedInitialSessionFlowControlWindowBytes() const {
 574   return initial_session_flow_control_window_bytes_.GetReceivedValue();
 575 }
 576
 577 void QuicConfig::SetSocketReceiveBufferToSend(uint32 tcp_receive_window) {
 578   socket_receive_buffer_.SetSendValue(tcp_receive_window);
 579 }
 580
 581 uint32 QuicConfig::GetSocketReceiveBufferToSend() const {
 582   return socket_receive_buffer_.GetSendValue();
 583 }
 584
 585 bool QuicConfig::HasReceivedSocketReceiveBuffer() const {
 586   return socket_receive_buffer_.HasReceivedValue();
 587 }
 588
 589 uint32 QuicConfig::ReceivedSocketReceiveBuffer() const {
 590   return socket_receive_buffer_.GetReceivedValue();
 591 }
 592
 593 bool QuicConfig::negotiated() const {
 594   // TODO(ianswett): Add the negotiated parameters once and iterate over all
 595   // of them in negotiated, ToHandshakeMessage, ProcessClientHello, and
 596   // ProcessServerHello.
 597   return congestion_feedback_.negotiated() &&
 598       idle_connection_state_lifetime_seconds_.negotiated() &&
 599       max_streams_per_connection_.negotiated();
 600 }
 601
 602 void QuicConfig::SetDefaults() {
 603   QuicTagVector congestion_feedback;
 604   // TODO(alyssar) stop sending this once QUIC_VERSION_23 is sunset.
 605   // This field was required until version 22 was removed but by the time
 606   // QUIC_VERSION_23 is sunset, no users of QUIC_VERSION_24 should be expecting
 607   // it.
 608   congestion_feedback.push_back(kQBIC);
 609   congestion_feedback_.set(congestion_feedback, kQBIC);
 610   idle_connection_state_lifetime_seconds_.set(kMaximumIdleTimeoutSecs,
 611                                               kDefaultIdleTimeoutSecs);
 612   if (FLAGS_quic_allow_silent_close) {
 613     silent_close_.set(1, 0);
 614   } else {
 615     silent_close_.set(0, 0);
 616   }
 617   SetMaxStreamsPerConnection(kDefaultMaxStreamsPerConnection,
 618                              kDefaultMaxStreamsPerConnection);
 619   max_time_before_crypto_handshake_ =
 620       QuicTime::Delta::FromSeconds(kMaxTimeForCryptoHandshakeSecs);
 621   max_idle_time_before_crypto_handshake_ =
 622       QuicTime::Delta::FromSeconds(kInitialIdleTimeoutSecs);
 623   max_undecryptable_packets_ = kDefaultMaxUndecryptablePackets;
 624
 625   SetInitialStreamFlowControlWindowToSend(kMinimumFlowControlSendWindow);
 626   SetInitialSessionFlowControlWindowToSend(kMinimumFlowControlSendWindow);
 627 }
 628
 629 void QuicConfig::ToHandshakeMessage(CryptoHandshakeMessage* out) const {
 630   congestion_feedback_.ToHandshakeMessage(out);
 631   idle_connection_state_lifetime_seconds_.ToHandshakeMessage(out);
 632   silent_close_.ToHandshakeMessage(out);
 633   max_streams_per_connection_.ToHandshakeMessage(out);
 634   bytes_for_connection_id_.ToHandshakeMessage(out);
 635   initial_round_trip_time_us_.ToHandshakeMessage(out);
 636   initial_stream_flow_control_window_bytes_.ToHandshakeMessage(out);
 637   initial_session_flow_control_window_bytes_.ToHandshakeMessage(out);
 638   socket_receive_buffer_.ToHandshakeMessage(out);
 639   connection_options_.ToHandshakeMessage(out);
 640 }
 641
 642 QuicErrorCode QuicConfig::ProcessPeerHello(
 643     const CryptoHandshakeMessage& peer_hello,
 644     HelloType hello_type,
 645     string* error_details) {
 646   DCHECK(error_details != nullptr);
 647
 648   QuicErrorCode error = QUIC_NO_ERROR;
 649   if (error == QUIC_NO_ERROR) {
 650     error = congestion_feedback_.ProcessPeerHello(
 651         peer_hello,  hello_type, error_details);
 652   }
 653   if (error == QUIC_NO_ERROR) {
 654     error = idle_connection_state_lifetime_seconds_.ProcessPeerHello(
 655         peer_hello, hello_type, error_details);
 656   }
 657   if (error == QUIC_NO_ERROR) {
 658     error =
 659         silent_close_.ProcessPeerHello(peer_hello, hello_type, error_details);
 660   }
 661   if (error == QUIC_NO_ERROR) {
 662     error = max_streams_per_connection_.ProcessPeerHello(
 663         peer_hello, hello_type, error_details);
 664   }
 665   if (error == QUIC_NO_ERROR) {
 666     error = bytes_for_connection_id_.ProcessPeerHello(
 667         peer_hello, hello_type, error_details);
 668   }
 669   if (error == QUIC_NO_ERROR) {
 670     error = initial_round_trip_time_us_.ProcessPeerHello(
 671         peer_hello, hello_type, error_details);
 672   }
 673   if (error == QUIC_NO_ERROR) {
 674     error = initial_stream_flow_control_window_bytes_.ProcessPeerHello(
 675         peer_hello, hello_type, error_details);
 676   }
 677   if (error == QUIC_NO_ERROR) {
 678     error = initial_session_flow_control_window_bytes_.ProcessPeerHello(
 679         peer_hello, hello_type, error_details);
 680   }
 681   if (error == QUIC_NO_ERROR) {
 682     error = socket_receive_buffer_.ProcessPeerHello(
 683         peer_hello, hello_type, error_details);
 684   }
 685   if (error == QUIC_NO_ERROR) {
 686     error = connection_options_.ProcessPeerHello(
 687         peer_hello, hello_type, error_details);
 688   }
 689   return error;
 690 }
 691
 692 }  // namespace net