net/quic/quic_protocol.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_protocol.h"
   6
   7 #include "base/stl_util.h"
   8 #include "net/quic/quic_utils.h"
   9
  10 using base::StringPiece;
  11 using std::map;
  12 using std::numeric_limits;
  13 using std::ostream;
  14 using std::string;
  15
  16 namespace net {
  17
  18 size_t GetPacketHeaderSize(const QuicPacketHeader& header) {
  19   return GetPacketHeaderSize(header.public_header.connection_id_length,
  20                              header.public_header.version_flag,
  21                              header.public_header.sequence_number_length,
  22                              header.is_in_fec_group);
  23 }
  24
  25 size_t GetPacketHeaderSize(QuicConnectionIdLength connection_id_length,
  26                            bool include_version,
  27                            QuicSequenceNumberLength sequence_number_length,
  28                            InFecGroup is_in_fec_group) {
  29   return kPublicFlagsSize + connection_id_length +
  30       (include_version ? kQuicVersionSize : 0) + sequence_number_length +
  31       kPrivateFlagsSize + (is_in_fec_group == IN_FEC_GROUP ? kFecGroupSize : 0);
  32 }
  33
  34 size_t GetStartOfFecProtectedData(
  35     QuicConnectionIdLength connection_id_length,
  36     bool include_version,
  37     QuicSequenceNumberLength sequence_number_length) {
  38   return GetPacketHeaderSize(connection_id_length,
  39                              include_version,
  40                              sequence_number_length,
  41                              IN_FEC_GROUP);
  42 }
  43
  44 size_t GetStartOfEncryptedData(
  45     QuicConnectionIdLength connection_id_length,
  46     bool include_version,
  47     QuicSequenceNumberLength sequence_number_length) {
  48   // Don't include the fec size, since encryption starts before private flags.
  49   return GetPacketHeaderSize(connection_id_length,
  50                              include_version,
  51                              sequence_number_length,
  52                              NOT_IN_FEC_GROUP) - kPrivateFlagsSize;
  53 }
  54
  55 QuicPacketPublicHeader::QuicPacketPublicHeader()
  56     : connection_id(0),
  57       connection_id_length(PACKET_8BYTE_CONNECTION_ID),
  58       reset_flag(false),
  59       version_flag(false),
  60       sequence_number_length(PACKET_6BYTE_SEQUENCE_NUMBER) {
  61 }
  62
  63 QuicPacketPublicHeader::QuicPacketPublicHeader(
  64     const QuicPacketPublicHeader& other)
  65     : connection_id(other.connection_id),
  66       connection_id_length(other.connection_id_length),
  67       reset_flag(other.reset_flag),
  68       version_flag(other.version_flag),
  69       sequence_number_length(other.sequence_number_length),
  70       versions(other.versions) {
  71 }
  72
  73 QuicPacketPublicHeader::~QuicPacketPublicHeader() {}
  74
  75 QuicPacketHeader::QuicPacketHeader()
  76     : fec_flag(false),
  77       entropy_flag(false),
  78       entropy_hash(0),
  79       packet_sequence_number(0),
  80       is_in_fec_group(NOT_IN_FEC_GROUP),
  81       fec_group(0) {
  82 }
  83
  84 QuicPacketHeader::QuicPacketHeader(const QuicPacketPublicHeader& header)
  85     : public_header(header),
  86       fec_flag(false),
  87       entropy_flag(false),
  88       entropy_hash(0),
  89       packet_sequence_number(0),
  90       is_in_fec_group(NOT_IN_FEC_GROUP),
  91       fec_group(0) {
  92 }
  93
  94 QuicPublicResetPacket::QuicPublicResetPacket()
  95     : nonce_proof(0),
  96       rejected_sequence_number(0) {}
  97
  98 QuicPublicResetPacket::QuicPublicResetPacket(
  99     const QuicPacketPublicHeader& header)
 100     : public_header(header),
 101       nonce_proof(0),
 102       rejected_sequence_number(0) {}
 103
 104 QuicStreamFrame::QuicStreamFrame()
 105     : stream_id(0),
 106       fin(false),
 107       offset(0),
 108       notifier(nullptr) {}
 109
 110 QuicStreamFrame::QuicStreamFrame(const QuicStreamFrame& frame)
 111     : stream_id(frame.stream_id),
 112       fin(frame.fin),
 113       offset(frame.offset),
 114       data(frame.data),
 115       notifier(frame.notifier) {
 116 }
 117
 118 QuicStreamFrame::QuicStreamFrame(QuicStreamId stream_id,
 119                                  bool fin,
 120                                  QuicStreamOffset offset,
 121                                  IOVector data)
 122     : stream_id(stream_id),
 123       fin(fin),
 124       offset(offset),
 125       data(data),
 126       notifier(nullptr) {}
 127
 128 string* QuicStreamFrame::GetDataAsString() const {
 129   string* data_string = new string();
 130   data_string->reserve(data.TotalBufferSize());
 131   for (size_t i = 0; i < data.Size(); ++i) {
 132     data_string->append(static_cast<char*>(data.iovec()[i].iov_base),
 133                         data.iovec()[i].iov_len);
 134   }
 135   DCHECK_EQ(data_string->size(), data.TotalBufferSize());
 136   return data_string;
 137 }
 138
 139 uint32 MakeQuicTag(char a, char b, char c, char d) {
 140   return static_cast<uint32>(a) |
 141          static_cast<uint32>(b) << 8 |
 142          static_cast<uint32>(c) << 16 |
 143          static_cast<uint32>(d) << 24;
 144 }
 145
 146 bool ContainsQuicTag(const QuicTagVector& tag_vector, QuicTag tag) {
 147   return std::find(tag_vector.begin(), tag_vector.end(),  tag)
 148       != tag_vector.end();
 149 }
 150
 151 QuicVersionVector QuicSupportedVersions() {
 152   QuicVersionVector supported_versions;
 153   for (size_t i = 0; i < arraysize(kSupportedQuicVersions); ++i) {
 154     supported_versions.push_back(kSupportedQuicVersions[i]);
 155   }
 156   return supported_versions;
 157 }
 158
 159 QuicTag QuicVersionToQuicTag(const QuicVersion version) {
 160   switch (version) {
 161     case QUIC_VERSION_23:
 162       return MakeQuicTag('Q', '0', '2', '3');
 163     case QUIC_VERSION_24:
 164       return MakeQuicTag('Q', '0', '2', '4');
 165     default:
 166       // This shold be an ERROR because we should never attempt to convert an
 167       // invalid QuicVersion to be written to the wire.
 168       LOG(ERROR) << "Unsupported QuicVersion: " << version;
 169       return 0;
 170   }
 171 }
 172
 173 QuicVersion QuicTagToQuicVersion(const QuicTag version_tag) {
 174   for (size_t i = 0; i < arraysize(kSupportedQuicVersions); ++i) {
 175     if (version_tag == QuicVersionToQuicTag(kSupportedQuicVersions[i])) {
 176       return kSupportedQuicVersions[i];
 177     }
 178   }
 179   // Reading from the client so this should not be considered an ERROR.
 180   DVLOG(1) << "Unsupported QuicTag version: "
 181            << QuicUtils::TagToString(version_tag);
 182   return QUIC_VERSION_UNSUPPORTED;
 183 }
 184
 185 #define RETURN_STRING_LITERAL(x) \
 186 case x: \
 187 return #x
 188
 189 string QuicVersionToString(const QuicVersion version) {
 190   switch (version) {
 191     RETURN_STRING_LITERAL(QUIC_VERSION_23);
 192     RETURN_STRING_LITERAL(QUIC_VERSION_24);
 193     default:
 194       return "QUIC_VERSION_UNSUPPORTED";
 195   }
 196 }
 197
 198 string QuicVersionVectorToString(const QuicVersionVector& versions) {
 199   string result = "";
 200   for (size_t i = 0; i < versions.size(); ++i) {
 201     if (i != 0) {
 202       result.append(",");
 203     }
 204     result.append(QuicVersionToString(versions[i]));
 205   }
 206   return result;
 207 }
 208
 209 ostream& operator<<(ostream& os, const QuicPacketHeader& header) {
 210   os << "{ connection_id: " << header.public_header.connection_id
 211      << ", connection_id_length:" << header.public_header.connection_id_length
 212      << ", sequence_number_length:"
 213      << header.public_header.sequence_number_length
 214      << ", reset_flag: " << header.public_header.reset_flag
 215      << ", version_flag: " << header.public_header.version_flag;
 216   if (header.public_header.version_flag) {
 217     os << " version: ";
 218     for (size_t i = 0; i < header.public_header.versions.size(); ++i) {
 219       os << header.public_header.versions[0] << " ";
 220     }
 221   }
 222   os << ", fec_flag: " << header.fec_flag
 223      << ", entropy_flag: " << header.entropy_flag
 224      << ", entropy hash: " << static_cast<int>(header.entropy_hash)
 225      << ", sequence_number: " << header.packet_sequence_number
 226      << ", is_in_fec_group:" << header.is_in_fec_group
 227      << ", fec_group: " << header.fec_group<< "}\n";
 228   return os;
 229 }
 230
 231 bool IsAwaitingPacket(const QuicAckFrame& ack_frame,
 232                       QuicPacketSequenceNumber sequence_number) {
 233   return sequence_number > ack_frame.largest_observed ||
 234       ContainsKey(ack_frame.missing_packets, sequence_number);
 235 }
 236
 237 void InsertMissingPacketsBetween(QuicAckFrame* ack_frame,
 238                                  QuicPacketSequenceNumber lower,
 239                                  QuicPacketSequenceNumber higher) {
 240   for (QuicPacketSequenceNumber i = lower; i < higher; ++i) {
 241     ack_frame->missing_packets.insert(i);
 242   }
 243 }
 244
 245 QuicStopWaitingFrame::QuicStopWaitingFrame()
 246     : entropy_hash(0),
 247       least_unacked(0) {
 248 }
 249
 250 QuicStopWaitingFrame::~QuicStopWaitingFrame() {}
 251
 252 QuicAckFrame::QuicAckFrame()
 253     : entropy_hash(0),
 254       largest_observed(0),
 255       delta_time_largest_observed(QuicTime::Delta::Infinite()),
 256       is_truncated(false) {}
 257
 258 QuicAckFrame::~QuicAckFrame() {}
 259
 260 QuicRstStreamErrorCode AdjustErrorForVersion(
 261     QuicRstStreamErrorCode error_code,
 262     QuicVersion version) {
 263   return error_code;
 264 }
 265
 266 QuicRstStreamFrame::QuicRstStreamFrame()
 267     : stream_id(0),
 268       error_code(QUIC_STREAM_NO_ERROR) {
 269 }
 270
 271 QuicRstStreamFrame::QuicRstStreamFrame(QuicStreamId stream_id,
 272                                        QuicRstStreamErrorCode error_code,
 273                                        QuicStreamOffset bytes_written)
 274     : stream_id(stream_id),
 275       error_code(error_code),
 276       byte_offset(bytes_written) {
 277   DCHECK_LE(error_code, numeric_limits<uint8>::max());
 278 }
 279
 280 QuicConnectionCloseFrame::QuicConnectionCloseFrame()
 281     : error_code(QUIC_NO_ERROR) {
 282 }
 283
 284 QuicFrame::QuicFrame() {}
 285
 286 QuicFrame::QuicFrame(QuicPaddingFrame* padding_frame)
 287     : type(PADDING_FRAME),
 288       padding_frame(padding_frame) {
 289 }
 290
 291 QuicFrame::QuicFrame(QuicStreamFrame* stream_frame)
 292     : type(STREAM_FRAME),
 293       stream_frame(stream_frame) {
 294 }
 295
 296 QuicFrame::QuicFrame(QuicAckFrame* frame)
 297     : type(ACK_FRAME),
 298       ack_frame(frame) {
 299 }
 300
 301 QuicFrame::QuicFrame(QuicStopWaitingFrame* frame)
 302     : type(STOP_WAITING_FRAME),
 303       stop_waiting_frame(frame) {
 304 }
 305
 306 QuicFrame::QuicFrame(QuicPingFrame* frame)
 307     : type(PING_FRAME),
 308       ping_frame(frame) {
 309 }
 310
 311 QuicFrame::QuicFrame(QuicRstStreamFrame* frame)
 312     : type(RST_STREAM_FRAME),
 313       rst_stream_frame(frame) {
 314 }
 315
 316 QuicFrame::QuicFrame(QuicConnectionCloseFrame* frame)
 317     : type(CONNECTION_CLOSE_FRAME),
 318       connection_close_frame(frame) {
 319 }
 320
 321 QuicFrame::QuicFrame(QuicGoAwayFrame* frame)
 322     : type(GOAWAY_FRAME),
 323       goaway_frame(frame) {
 324 }
 325
 326 QuicFrame::QuicFrame(QuicWindowUpdateFrame* frame)
 327     : type(WINDOW_UPDATE_FRAME),
 328       window_update_frame(frame) {
 329 }
 330
 331 QuicFrame::QuicFrame(QuicBlockedFrame* frame)
 332     : type(BLOCKED_FRAME),
 333       blocked_frame(frame) {
 334 }
 335
 336 QuicFecData::QuicFecData() : fec_group(0) {}
 337
 338 ostream& operator<<(ostream& os, const QuicStopWaitingFrame& sent_info) {
 339   os << "entropy_hash: " << static_cast<int>(sent_info.entropy_hash)
 340      << " least_unacked: " << sent_info.least_unacked;
 341   return os;
 342 }
 343
 344 ostream& operator<<(ostream& os, const QuicAckFrame& ack_frame) {
 345   os << "entropy_hash: " << static_cast<int>(ack_frame.entropy_hash)
 346      << " largest_observed: " << ack_frame.largest_observed
 347      << " delta_time_largest_observed: "
 348      << ack_frame.delta_time_largest_observed.ToMicroseconds()
 349      << " missing_packets: [ ";
 350   for (SequenceNumberSet::const_iterator it = ack_frame.missing_packets.begin();
 351        it != ack_frame.missing_packets.end(); ++it) {
 352     os << *it << " ";
 353   }
 354   os << " ] is_truncated: " << ack_frame.is_truncated;
 355   os << " revived_packets: [ ";
 356   for (SequenceNumberSet::const_iterator it = ack_frame.revived_packets.begin();
 357        it != ack_frame.revived_packets.end(); ++it) {
 358     os << *it << " ";
 359   }
 360   os << " ] received_packets: [ ";
 361   for (PacketTimeList::const_iterator it =
 362            ack_frame.received_packet_times.begin();
 363            it != ack_frame.received_packet_times.end(); ++it) {
 364     os << it->first << " at " << it->second.ToDebuggingValue() << " ";
 365   }
 366   os << " ]";
 367   return os;
 368 }
 369
 370 ostream& operator<<(ostream& os, const QuicFrame& frame) {
 371   switch (frame.type) {
 372   case PADDING_FRAME: {
 373       os << "type { PADDING_FRAME } ";
 374       break;
 375     }
 376     case RST_STREAM_FRAME: {
 377       os << "type { " << RST_STREAM_FRAME << " } " << *(frame.rst_stream_frame);
 378       break;
 379     }
 380     case CONNECTION_CLOSE_FRAME: {
 381       os << "type { CONNECTION_CLOSE_FRAME } "
 382          << *(frame.connection_close_frame);
 383       break;
 384     }
 385     case GOAWAY_FRAME: {
 386       os << "type { GOAWAY_FRAME } " << *(frame.goaway_frame);
 387       break;
 388     }
 389     case WINDOW_UPDATE_FRAME: {
 390       os << "type { WINDOW_UPDATE_FRAME } " << *(frame.window_update_frame);
 391       break;
 392     }
 393     case BLOCKED_FRAME: {
 394       os << "type { BLOCKED_FRAME } " << *(frame.blocked_frame);
 395       break;
 396     }
 397     case STREAM_FRAME: {
 398       os << "type { STREAM_FRAME } " << *(frame.stream_frame);
 399       break;
 400     }
 401     case ACK_FRAME: {
 402       os << "type { ACK_FRAME } " << *(frame.ack_frame);
 403       break;
 404     }
 405     case STOP_WAITING_FRAME: {
 406       os << "type { STOP_WAITING_FRAME } " << *(frame.stop_waiting_frame);
 407       break;
 408     }
 409     case PING_FRAME: {
 410       os << "type { PING_FRAME } ";
 411       break;
 412     }
 413     default: {
 414       LOG(ERROR) << "Unknown frame type: " << frame.type;
 415       break;
 416     }
 417   }
 418   return os;
 419 }
 420
 421 ostream& operator<<(ostream& os, const QuicRstStreamFrame& rst_frame) {
 422   os << "stream_id { " << rst_frame.stream_id << " } "
 423      << "error_code { " << rst_frame.error_code << " } "
 424      << "error_details { " << rst_frame.error_details << " }\n";
 425   return os;
 426 }
 427
 428 ostream& operator<<(ostream& os,
 429                     const QuicConnectionCloseFrame& connection_close_frame) {
 430   os << "error_code { " << connection_close_frame.error_code << " } "
 431      << "error_details { " << connection_close_frame.error_details << " }\n";
 432   return os;
 433 }
 434
 435 ostream& operator<<(ostream& os, const QuicGoAwayFrame& goaway_frame) {
 436   os << "error_code { " << goaway_frame.error_code << " } "
 437      << "last_good_stream_id { " << goaway_frame.last_good_stream_id << " } "
 438      << "reason_phrase { " << goaway_frame.reason_phrase << " }\n";
 439   return os;
 440 }
 441
 442 ostream& operator<<(ostream& os,
 443                     const QuicWindowUpdateFrame& window_update_frame) {
 444   os << "stream_id { " << window_update_frame.stream_id << " } "
 445      << "byte_offset { " << window_update_frame.byte_offset << " }\n";
 446   return os;
 447 }
 448
 449 ostream& operator<<(ostream& os, const QuicBlockedFrame& blocked_frame) {
 450   os << "stream_id { " << blocked_frame.stream_id << " }\n";
 451   return os;
 452 }
 453
 454 ostream& operator<<(ostream& os, const QuicStreamFrame& stream_frame) {
 455   os << "stream_id { " << stream_frame.stream_id << " } "
 456      << "fin { " << stream_frame.fin << " } "
 457      << "offset { " << stream_frame.offset << " } "
 458      << "data { "
 459      << QuicUtils::StringToHexASCIIDump(*(stream_frame.GetDataAsString()))
 460      << " }\n";
 461   return os;
 462 }
 463
 464 QuicGoAwayFrame::QuicGoAwayFrame()
 465     : error_code(QUIC_NO_ERROR),
 466       last_good_stream_id(0) {
 467 }
 468
 469 QuicGoAwayFrame::QuicGoAwayFrame(QuicErrorCode error_code,
 470                                  QuicStreamId last_good_stream_id,
 471                                  const string& reason)
 472     : error_code(error_code),
 473       last_good_stream_id(last_good_stream_id),
 474       reason_phrase(reason) {
 475   DCHECK_LE(error_code, numeric_limits<uint8>::max());
 476 }
 477
 478 QuicData::QuicData(const char* buffer,
 479                    size_t length)
 480     : buffer_(buffer),
 481       length_(length),
 482       owns_buffer_(false) {
 483 }
 484
 485 QuicData::QuicData(char* buffer,
 486                    size_t length,
 487                    bool owns_buffer)
 488     : buffer_(buffer),
 489       length_(length),
 490       owns_buffer_(owns_buffer) {
 491 }
 492
 493 QuicData::~QuicData() {
 494   if (owns_buffer_) {
 495     delete [] const_cast<char*>(buffer_);
 496   }
 497 }
 498
 499 QuicWindowUpdateFrame::QuicWindowUpdateFrame(QuicStreamId stream_id,
 500                                              QuicStreamOffset byte_offset)
 501     : stream_id(stream_id),
 502       byte_offset(byte_offset) {}
 503
 504 QuicBlockedFrame::QuicBlockedFrame(QuicStreamId stream_id)
 505     : stream_id(stream_id) {}
 506
 507 QuicPacket::QuicPacket(char* buffer,
 508                        size_t length,
 509                        bool owns_buffer,
 510                        QuicConnectionIdLength connection_id_length,
 511                        bool includes_version,
 512                        QuicSequenceNumberLength sequence_number_length)
 513     : QuicData(buffer, length, owns_buffer),
 514       buffer_(buffer),
 515       connection_id_length_(connection_id_length),
 516       includes_version_(includes_version),
 517       sequence_number_length_(sequence_number_length) {
 518 }
 519
 520 QuicEncryptedPacket::QuicEncryptedPacket(const char* buffer,
 521                                          size_t length)
 522     : QuicData(buffer, length) {
 523 }
 524
 525 QuicEncryptedPacket::QuicEncryptedPacket(char* buffer,
 526                                          size_t length,
 527                                          bool owns_buffer)
 528       : QuicData(buffer, length, owns_buffer) {
 529 }
 530
 531 StringPiece QuicPacket::FecProtectedData() const {
 532   const size_t start_of_fec = GetStartOfFecProtectedData(
 533       connection_id_length_, includes_version_, sequence_number_length_);
 534   return StringPiece(data() + start_of_fec, length() - start_of_fec);
 535 }
 536
 537 StringPiece QuicPacket::AssociatedData() const {
 538   return StringPiece(
 539       data() + kStartOfHashData,
 540       GetStartOfEncryptedData(
 541           connection_id_length_, includes_version_, sequence_number_length_) -
 542       kStartOfHashData);
 543 }
 544
 545 StringPiece QuicPacket::BeforePlaintext() const {
 546   return StringPiece(data(), GetStartOfEncryptedData(connection_id_length_,
 547                                                      includes_version_,
 548                                                      sequence_number_length_));
 549 }
 550
 551 StringPiece QuicPacket::Plaintext() const {
 552   const size_t start_of_encrypted_data =
 553       GetStartOfEncryptedData(
 554           connection_id_length_, includes_version_, sequence_number_length_);
 555   return StringPiece(data() + start_of_encrypted_data,
 556                      length() - start_of_encrypted_data);
 557 }
 558
 559 RetransmittableFrames::RetransmittableFrames(EncryptionLevel level)
 560     : encryption_level_(level), has_crypto_handshake_(NOT_HANDSHAKE) {
 561 }
 562
 563 RetransmittableFrames::~RetransmittableFrames() {
 564   for (QuicFrames::iterator it = frames_.begin(); it != frames_.end(); ++it) {
 565     switch (it->type) {
 566       case PADDING_FRAME:
 567         delete it->padding_frame;
 568         break;
 569       case STREAM_FRAME:
 570         delete it->stream_frame;
 571         break;
 572       case ACK_FRAME:
 573         delete it->ack_frame;
 574         break;
 575       case STOP_WAITING_FRAME:
 576         delete it->stop_waiting_frame;
 577         break;
 578       case PING_FRAME:
 579         delete it->ping_frame;
 580         break;
 581       case RST_STREAM_FRAME:
 582         delete it->rst_stream_frame;
 583         break;
 584       case CONNECTION_CLOSE_FRAME:
 585         delete it->connection_close_frame;
 586         break;
 587       case GOAWAY_FRAME:
 588         delete it->goaway_frame;
 589         break;
 590       case WINDOW_UPDATE_FRAME:
 591         delete it->window_update_frame;
 592         break;
 593       case BLOCKED_FRAME:
 594         delete it->blocked_frame;
 595         break;
 596       case NUM_FRAME_TYPES:
 597         DCHECK(false) << "Cannot delete type: " << it->type;
 598     }
 599   }
 600   STLDeleteElements(&stream_data_);
 601 }
 602
 603 const QuicFrame& RetransmittableFrames::AddStreamFrame(
 604     QuicStreamFrame* stream_frame) {
 605   // Make an owned copy of the stream frame's data.
 606   stream_data_.push_back(stream_frame->GetDataAsString());
 607   // Ensure the stream frame's IOVector points to the owned copy of the data.
 608   stream_frame->data.Clear();
 609   stream_frame->data.Append(const_cast<char*>(stream_data_.back()->data()),
 610                             stream_data_.back()->size());
 611   frames_.push_back(QuicFrame(stream_frame));
 612   if (stream_frame->stream_id == kCryptoStreamId) {
 613     has_crypto_handshake_ = IS_HANDSHAKE;
 614   }
 615   return frames_.back();
 616 }
 617
 618 const QuicFrame& RetransmittableFrames::AddNonStreamFrame(
 619     const QuicFrame& frame) {
 620   DCHECK_NE(frame.type, STREAM_FRAME);
 621   frames_.push_back(frame);
 622   return frames_.back();
 623 }
 624
 625 SerializedPacket::SerializedPacket(
 626     QuicPacketSequenceNumber sequence_number,
 627     QuicSequenceNumberLength sequence_number_length,
 628     QuicEncryptedPacket* packet,
 629     QuicPacketEntropyHash entropy_hash,
 630     RetransmittableFrames* retransmittable_frames)
 631     : sequence_number(sequence_number),
 632       sequence_number_length(sequence_number_length),
 633       packet(packet),
 634       entropy_hash(entropy_hash),
 635       retransmittable_frames(retransmittable_frames),
 636       is_fec_packet(false) {
 637 }
 638
 639 SerializedPacket::~SerializedPacket() {}
 640
 641 QuicEncryptedPacket* QuicEncryptedPacket::Clone() const {
 642   char* buffer = new char[this->length()];
 643   memcpy(buffer, this->data(), this->length());
 644   return new QuicEncryptedPacket(buffer, this->length(), true);
 645 }
 646
 647 ostream& operator<<(ostream& os, const QuicEncryptedPacket& s) {
 648   os << s.length() << "-byte data";
 649   return os;
 650 }
 651
 652 TransmissionInfo::TransmissionInfo()
 653     : retransmittable_frames(nullptr),
 654       sequence_number_length(PACKET_1BYTE_SEQUENCE_NUMBER),
 655       sent_time(QuicTime::Zero()),
 656       bytes_sent(0),
 657       nack_count(0),
 658       transmission_type(NOT_RETRANSMISSION),
 659       all_transmissions(nullptr),
 660       in_flight(false),
 661       is_unackable(false),
 662       is_fec_packet(false) {}
 663
 664 TransmissionInfo::TransmissionInfo(
 665     RetransmittableFrames* retransmittable_frames,
 666     QuicSequenceNumberLength sequence_number_length,
 667     TransmissionType transmission_type,
 668     QuicTime sent_time)
 669     : retransmittable_frames(retransmittable_frames),
 670       sequence_number_length(sequence_number_length),
 671       sent_time(sent_time),
 672       bytes_sent(0),
 673       nack_count(0),
 674       transmission_type(transmission_type),
 675       all_transmissions(nullptr),
 676       in_flight(false),
 677       is_unackable(false),
 678       is_fec_packet(false) {}
 679
 680 }  // namespace net