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