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     : packet_sequence_number(0),
  77       fec_flag(false),
  78       entropy_flag(false),
  79       entropy_hash(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       packet_sequence_number(0),
  87       fec_flag(false),
  88       entropy_flag(false),
  89       entropy_hash(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                                  StringPiece data)
 118     : stream_id(stream_id), fin(fin), offset(offset), data(data) {
 119 }
 120
 121 uint32 MakeQuicTag(char a, char b, char c, char d) {
 122   return static_cast<uint32>(a) |
 123          static_cast<uint32>(b) << 8 |
 124          static_cast<uint32>(c) << 16 |
 125          static_cast<uint32>(d) << 24;
 126 }
 127
 128 bool ContainsQuicTag(const QuicTagVector& tag_vector, QuicTag tag) {
 129   return std::find(tag_vector.begin(), tag_vector.end(),  tag)
 130       != tag_vector.end();
 131 }
 132
 133 QuicVersionVector QuicSupportedVersions() {
 134   QuicVersionVector supported_versions;
 135   for (size_t i = 0; i < arraysize(kSupportedQuicVersions); ++i) {
 136     supported_versions.push_back(kSupportedQuicVersions[i]);
 137   }
 138   return supported_versions;
 139 }
 140
 141 QuicTag QuicVersionToQuicTag(const QuicVersion version) {
 142   switch (version) {
 143     case QUIC_VERSION_24:
 144       return MakeQuicTag('Q', '0', '2', '4');
 145     case QUIC_VERSION_25:
 146       return MakeQuicTag('Q', '0', '2', '5');
 147     default:
 148       // This shold be an ERROR because we should never attempt to convert an
 149       // invalid QuicVersion to be written to the wire.
 150       LOG(ERROR) << "Unsupported QuicVersion: " << version;
 151       return 0;
 152   }
 153 }
 154
 155 QuicVersion QuicTagToQuicVersion(const QuicTag version_tag) {
 156   for (size_t i = 0; i < arraysize(kSupportedQuicVersions); ++i) {
 157     if (version_tag == QuicVersionToQuicTag(kSupportedQuicVersions[i])) {
 158       return kSupportedQuicVersions[i];
 159     }
 160   }
 161   // Reading from the client so this should not be considered an ERROR.
 162   DVLOG(1) << "Unsupported QuicTag version: "
 163            << QuicUtils::TagToString(version_tag);
 164   return QUIC_VERSION_UNSUPPORTED;
 165 }
 166
 167 #define RETURN_STRING_LITERAL(x) \
 168 case x: \
 169 return #x
 170
 171 string QuicVersionToString(const QuicVersion version) {
 172   switch (version) {
 173     RETURN_STRING_LITERAL(QUIC_VERSION_24);
 174     RETURN_STRING_LITERAL(QUIC_VERSION_25);
 175     default:
 176       return "QUIC_VERSION_UNSUPPORTED";
 177   }
 178 }
 179
 180 string QuicVersionVectorToString(const QuicVersionVector& versions) {
 181   string result = "";
 182   for (size_t i = 0; i < versions.size(); ++i) {
 183     if (i != 0) {
 184       result.append(",");
 185     }
 186     result.append(QuicVersionToString(versions[i]));
 187   }
 188   return result;
 189 }
 190
 191 ostream& operator<<(ostream& os, const Perspective& s) {
 192   if (s == Perspective::IS_SERVER) {
 193     os << "IS_SERVER";
 194   } else {
 195     os << "IS_CLIENT";
 196   }
 197   return os;
 198 }
 199
 200 ostream& operator<<(ostream& os, const QuicPacketHeader& header) {
 201   os << "{ connection_id: " << header.public_header.connection_id
 202      << ", connection_id_length:" << header.public_header.connection_id_length
 203      << ", sequence_number_length:"
 204      << header.public_header.sequence_number_length
 205      << ", reset_flag: " << header.public_header.reset_flag
 206      << ", version_flag: " << header.public_header.version_flag;
 207   if (header.public_header.version_flag) {
 208     os << " version: ";
 209     for (size_t i = 0; i < header.public_header.versions.size(); ++i) {
 210       os << header.public_header.versions[i] << " ";
 211     }
 212   }
 213   os << ", fec_flag: " << header.fec_flag
 214      << ", entropy_flag: " << header.entropy_flag
 215      << ", entropy hash: " << static_cast<int>(header.entropy_hash)
 216      << ", sequence_number: " << header.packet_sequence_number
 217      << ", is_in_fec_group:" << header.is_in_fec_group
 218      << ", fec_group: " << header.fec_group<< "}\n";
 219   return os;
 220 }
 221
 222 bool IsAwaitingPacket(const QuicAckFrame& ack_frame,
 223                       QuicPacketSequenceNumber sequence_number) {
 224   return sequence_number > ack_frame.largest_observed ||
 225       ContainsKey(ack_frame.missing_packets, sequence_number);
 226 }
 227
 228 void InsertMissingPacketsBetween(QuicAckFrame* ack_frame,
 229                                  QuicPacketSequenceNumber lower,
 230                                  QuicPacketSequenceNumber higher) {
 231   for (QuicPacketSequenceNumber i = lower; i < higher; ++i) {
 232     ack_frame->missing_packets.insert(i);
 233   }
 234 }
 235
 236 QuicStopWaitingFrame::QuicStopWaitingFrame()
 237     : entropy_hash(0),
 238       least_unacked(0) {
 239 }
 240
 241 QuicStopWaitingFrame::~QuicStopWaitingFrame() {}
 242
 243 QuicAckFrame::QuicAckFrame()
 244     : entropy_hash(0),
 245       largest_observed(0),
 246       delta_time_largest_observed(QuicTime::Delta::Infinite()),
 247       is_truncated(false) {}
 248
 249 QuicAckFrame::~QuicAckFrame() {}
 250
 251 QuicRstStreamErrorCode AdjustErrorForVersion(
 252     QuicRstStreamErrorCode error_code,
 253     QuicVersion version) {
 254   return error_code;
 255 }
 256
 257 QuicRstStreamFrame::QuicRstStreamFrame()
 258     : stream_id(0),
 259       error_code(QUIC_STREAM_NO_ERROR) {
 260 }
 261
 262 QuicRstStreamFrame::QuicRstStreamFrame(QuicStreamId stream_id,
 263                                        QuicRstStreamErrorCode error_code,
 264                                        QuicStreamOffset bytes_written)
 265     : stream_id(stream_id),
 266       error_code(error_code),
 267       byte_offset(bytes_written) {
 268   DCHECK_LE(error_code, numeric_limits<uint8>::max());
 269 }
 270
 271 QuicConnectionCloseFrame::QuicConnectionCloseFrame()
 272     : error_code(QUIC_NO_ERROR) {
 273 }
 274
 275 QuicFrame::QuicFrame() {}
 276
 277 QuicFrame::QuicFrame(QuicPaddingFrame* padding_frame)
 278     : type(PADDING_FRAME),
 279       padding_frame(padding_frame) {
 280 }
 281
 282 QuicFrame::QuicFrame(QuicStreamFrame* stream_frame)
 283     : type(STREAM_FRAME),
 284       stream_frame(stream_frame) {
 285 }
 286
 287 QuicFrame::QuicFrame(QuicAckFrame* frame)
 288     : type(ACK_FRAME),
 289       ack_frame(frame) {
 290 }
 291
 292 QuicFrame::QuicFrame(QuicStopWaitingFrame* frame)
 293     : type(STOP_WAITING_FRAME),
 294       stop_waiting_frame(frame) {
 295 }
 296
 297 QuicFrame::QuicFrame(QuicPingFrame* frame)
 298     : type(PING_FRAME),
 299       ping_frame(frame) {
 300 }
 301
 302 QuicFrame::QuicFrame(QuicRstStreamFrame* frame)
 303     : type(RST_STREAM_FRAME),
 304       rst_stream_frame(frame) {
 305 }
 306
 307 QuicFrame::QuicFrame(QuicConnectionCloseFrame* frame)
 308     : type(CONNECTION_CLOSE_FRAME),
 309       connection_close_frame(frame) {
 310 }
 311
 312 QuicFrame::QuicFrame(QuicGoAwayFrame* frame)
 313     : type(GOAWAY_FRAME),
 314       goaway_frame(frame) {
 315 }
 316
 317 QuicFrame::QuicFrame(QuicWindowUpdateFrame* frame)
 318     : type(WINDOW_UPDATE_FRAME),
 319       window_update_frame(frame) {
 320 }
 321
 322 QuicFrame::QuicFrame(QuicBlockedFrame* frame)
 323     : type(BLOCKED_FRAME),
 324       blocked_frame(frame) {
 325 }
 326
 327 QuicFecData::QuicFecData() : fec_group(0) {}
 328
 329 ostream& operator<<(ostream& os, const QuicStopWaitingFrame& sent_info) {
 330   os << "entropy_hash: " << static_cast<int>(sent_info.entropy_hash)
 331      << " least_unacked: " << sent_info.least_unacked;
 332   return os;
 333 }
 334
 335 ostream& operator<<(ostream& os, const QuicAckFrame& ack_frame) {
 336   os << "entropy_hash: " << static_cast<int>(ack_frame.entropy_hash)
 337      << " largest_observed: " << ack_frame.largest_observed
 338      << " delta_time_largest_observed: "
 339      << ack_frame.delta_time_largest_observed.ToMicroseconds()
 340      << " missing_packets: [ ";
 341   for (SequenceNumberSet::const_iterator it = ack_frame.missing_packets.begin();
 342        it != ack_frame.missing_packets.end(); ++it) {
 343     os << *it << " ";
 344   }
 345   os << " ] is_truncated: " << ack_frame.is_truncated;
 346   os << " revived_packets: [ ";
 347   for (SequenceNumberSet::const_iterator it = ack_frame.revived_packets.begin();
 348        it != ack_frame.revived_packets.end(); ++it) {
 349     os << *it << " ";
 350   }
 351   os << " ] received_packets: [ ";
 352   for (PacketTimeList::const_iterator it =
 353            ack_frame.received_packet_times.begin();
 354            it != ack_frame.received_packet_times.end(); ++it) {
 355     os << it->first << " at " << it->second.ToDebuggingValue() << " ";
 356   }
 357   os << " ]";
 358   return os;
 359 }
 360
 361 ostream& operator<<(ostream& os, const QuicFrame& frame) {
 362   switch (frame.type) {
 363   case PADDING_FRAME: {
 364       os << "type { PADDING_FRAME } ";
 365       break;
 366     }
 367     case RST_STREAM_FRAME: {
 368       os << "type { RST_STREAM_FRAME } " << *(frame.rst_stream_frame);
 369       break;
 370     }
 371     case CONNECTION_CLOSE_FRAME: {
 372       os << "type { CONNECTION_CLOSE_FRAME } "
 373          << *(frame.connection_close_frame);
 374       break;
 375     }
 376     case GOAWAY_FRAME: {
 377       os << "type { GOAWAY_FRAME } " << *(frame.goaway_frame);
 378       break;
 379     }
 380     case WINDOW_UPDATE_FRAME: {
 381       os << "type { WINDOW_UPDATE_FRAME } " << *(frame.window_update_frame);
 382       break;
 383     }
 384     case BLOCKED_FRAME: {
 385       os << "type { BLOCKED_FRAME } " << *(frame.blocked_frame);
 386       break;
 387     }
 388     case STREAM_FRAME: {
 389       os << "type { STREAM_FRAME } " << *(frame.stream_frame);
 390       break;
 391     }
 392     case ACK_FRAME: {
 393       os << "type { ACK_FRAME } " << *(frame.ack_frame);
 394       break;
 395     }
 396     case STOP_WAITING_FRAME: {
 397       os << "type { STOP_WAITING_FRAME } " << *(frame.stop_waiting_frame);
 398       break;
 399     }
 400     case PING_FRAME: {
 401       os << "type { PING_FRAME } ";
 402       break;
 403     }
 404     default: {
 405       LOG(ERROR) << "Unknown frame type: " << frame.type;
 406       break;
 407     }
 408   }
 409   return os;
 410 }
 411
 412 ostream& operator<<(ostream& os, const QuicRstStreamFrame& rst_frame) {
 413   os << "stream_id { " << rst_frame.stream_id << " } "
 414      << "error_code { " << rst_frame.error_code << " } "
 415      << "error_details { " << rst_frame.error_details << " }\n";
 416   return os;
 417 }
 418
 419 ostream& operator<<(ostream& os,
 420                     const QuicConnectionCloseFrame& connection_close_frame) {
 421   os << "error_code { " << connection_close_frame.error_code << " } "
 422      << "error_details { " << connection_close_frame.error_details << " }\n";
 423   return os;
 424 }
 425
 426 ostream& operator<<(ostream& os, const QuicGoAwayFrame& goaway_frame) {
 427   os << "error_code { " << goaway_frame.error_code << " } "
 428      << "last_good_stream_id { " << goaway_frame.last_good_stream_id << " } "
 429      << "reason_phrase { " << goaway_frame.reason_phrase << " }\n";
 430   return os;
 431 }
 432
 433 ostream& operator<<(ostream& os,
 434                     const QuicWindowUpdateFrame& window_update_frame) {
 435   os << "stream_id { " << window_update_frame.stream_id << " } "
 436      << "byte_offset { " << window_update_frame.byte_offset << " }\n";
 437   return os;
 438 }
 439
 440 ostream& operator<<(ostream& os, const QuicBlockedFrame& blocked_frame) {
 441   os << "stream_id { " << blocked_frame.stream_id << " }\n";
 442   return os;
 443 }
 444
 445 ostream& operator<<(ostream& os, const QuicStreamFrame& stream_frame) {
 446   os << "stream_id { " << stream_frame.stream_id << " } "
 447      << "fin { " << stream_frame.fin << " } "
 448      << "offset { " << stream_frame.offset << " } "
 449      << "data { " << QuicUtils::StringToHexASCIIDump(stream_frame.data)
 450      << " }\n";
 451   return os;
 452 }
 453
 454 QuicGoAwayFrame::QuicGoAwayFrame()
 455     : error_code(QUIC_NO_ERROR),
 456       last_good_stream_id(0) {
 457 }
 458
 459 QuicGoAwayFrame::QuicGoAwayFrame(QuicErrorCode error_code,
 460                                  QuicStreamId last_good_stream_id,
 461                                  const string& reason)
 462     : error_code(error_code),
 463       last_good_stream_id(last_good_stream_id),
 464       reason_phrase(reason) {
 465   DCHECK_LE(error_code, numeric_limits<uint8>::max());
 466 }
 467
 468 QuicData::QuicData(const char* buffer,
 469                    size_t length)
 470     : buffer_(buffer),
 471       length_(length),
 472       owns_buffer_(false) {
 473 }
 474
 475 QuicData::QuicData(char* buffer,
 476                    size_t length,
 477                    bool owns_buffer)
 478     : buffer_(buffer),
 479       length_(length),
 480       owns_buffer_(owns_buffer) {
 481 }
 482
 483 QuicData::~QuicData() {
 484   if (owns_buffer_) {
 485     delete [] const_cast<char*>(buffer_);
 486   }
 487 }
 488
 489 QuicWindowUpdateFrame::QuicWindowUpdateFrame(QuicStreamId stream_id,
 490                                              QuicStreamOffset byte_offset)
 491     : stream_id(stream_id),
 492       byte_offset(byte_offset) {}
 493
 494 QuicBlockedFrame::QuicBlockedFrame(QuicStreamId stream_id)
 495     : stream_id(stream_id) {}
 496
 497 QuicPacket::QuicPacket(char* buffer,
 498                        size_t length,
 499                        bool owns_buffer,
 500                        QuicConnectionIdLength connection_id_length,
 501                        bool includes_version,
 502                        QuicSequenceNumberLength sequence_number_length)
 503     : QuicData(buffer, length, owns_buffer),
 504       buffer_(buffer),
 505       connection_id_length_(connection_id_length),
 506       includes_version_(includes_version),
 507       sequence_number_length_(sequence_number_length) {
 508 }
 509
 510 QuicEncryptedPacket::QuicEncryptedPacket(const char* buffer,
 511                                          size_t length)
 512     : QuicData(buffer, length) {
 513 }
 514
 515 QuicEncryptedPacket::QuicEncryptedPacket(char* buffer,
 516                                          size_t length,
 517                                          bool owns_buffer)
 518       : QuicData(buffer, length, owns_buffer) {
 519 }
 520
 521 StringPiece QuicPacket::FecProtectedData() const {
 522   const size_t start_of_fec = GetStartOfFecProtectedData(
 523       connection_id_length_, includes_version_, sequence_number_length_);
 524   return StringPiece(data() + start_of_fec, length() - start_of_fec);
 525 }
 526
 527 StringPiece QuicPacket::AssociatedData() const {
 528   return StringPiece(
 529       data() + kStartOfHashData,
 530       GetStartOfEncryptedData(
 531           connection_id_length_, includes_version_, sequence_number_length_) -
 532       kStartOfHashData);
 533 }
 534
 535 StringPiece QuicPacket::BeforePlaintext() const {
 536   return StringPiece(data(), GetStartOfEncryptedData(connection_id_length_,
 537                                                      includes_version_,
 538                                                      sequence_number_length_));
 539 }
 540
 541 StringPiece QuicPacket::Plaintext() const {
 542   const size_t start_of_encrypted_data =
 543       GetStartOfEncryptedData(
 544           connection_id_length_, includes_version_, sequence_number_length_);
 545   return StringPiece(data() + start_of_encrypted_data,
 546                      length() - start_of_encrypted_data);
 547 }
 548
 549 RetransmittableFrames::RetransmittableFrames(EncryptionLevel level)
 550     : encryption_level_(level), has_crypto_handshake_(NOT_HANDSHAKE) {
 551 }
 552
 553 RetransmittableFrames::~RetransmittableFrames() {
 554   for (QuicFrames::iterator it = frames_.begin(); it != frames_.end(); ++it) {
 555     switch (it->type) {
 556       case PADDING_FRAME:
 557         delete it->padding_frame;
 558         break;
 559       case STREAM_FRAME:
 560         delete it->stream_frame;
 561         break;
 562       case ACK_FRAME:
 563         delete it->ack_frame;
 564         break;
 565       case STOP_WAITING_FRAME:
 566         delete it->stop_waiting_frame;
 567         break;
 568       case PING_FRAME:
 569         delete it->ping_frame;
 570         break;
 571       case RST_STREAM_FRAME:
 572         delete it->rst_stream_frame;
 573         break;
 574       case CONNECTION_CLOSE_FRAME:
 575         delete it->connection_close_frame;
 576         break;
 577       case GOAWAY_FRAME:
 578         delete it->goaway_frame;
 579         break;
 580       case WINDOW_UPDATE_FRAME:
 581         delete it->window_update_frame;
 582         break;
 583       case BLOCKED_FRAME:
 584         delete it->blocked_frame;
 585         break;
 586       case NUM_FRAME_TYPES:
 587         DCHECK(false) << "Cannot delete type: " << it->type;
 588     }
 589   }
 590   for (const char* buffer : stream_data_) {
 591     delete[] buffer;
 592   }
 593 }
 594
 595 const QuicFrame& RetransmittableFrames::AddFrame(const QuicFrame& frame) {
 596   return AddFrame(frame, nullptr);
 597 }
 598
 599 const QuicFrame& RetransmittableFrames::AddFrame(const QuicFrame& frame,
 600                                                  char* buffer) {
 601   if (frame.type == STREAM_FRAME &&
 602       frame.stream_frame->stream_id == kCryptoStreamId) {
 603     has_crypto_handshake_ = IS_HANDSHAKE;
 604   }
 605   if (buffer != nullptr) {
 606     stream_data_.push_back(buffer);
 607   }
 608   frames_.push_back(frame);
 609   return frames_.back();
 610 }
 611
 612 void RetransmittableFrames::RemoveFramesForStream(QuicStreamId stream_id) {
 613   QuicFrames::iterator it = frames_.begin();
 614   while (it != frames_.end()) {
 615     if (it->type != STREAM_FRAME || it->stream_frame->stream_id != stream_id) {
 616       ++it;
 617       continue;
 618     }
 619     delete it->stream_frame;
 620     it = frames_.erase(it);
 621   }
 622 }
 623
 624 SerializedPacket::SerializedPacket(
 625     QuicPacketSequenceNumber sequence_number,
 626     QuicSequenceNumberLength sequence_number_length,
 627     QuicEncryptedPacket* packet,
 628     QuicPacketEntropyHash entropy_hash,
 629     RetransmittableFrames* retransmittable_frames)
 630     : packet(packet),
 631       retransmittable_frames(retransmittable_frames),
 632       sequence_number(sequence_number),
 633       sequence_number_length(sequence_number_length),
 634       entropy_hash(entropy_hash),
 635       is_fec_packet(false) {
 636 }
 637
 638 SerializedPacket::~SerializedPacket() {}
 639
 640 QuicEncryptedPacket* QuicEncryptedPacket::Clone() const {
 641   char* buffer = new char[this->length()];
 642   memcpy(buffer, this->data(), this->length());
 643   return new QuicEncryptedPacket(buffer, this->length(), true);
 644 }
 645
 646 ostream& operator<<(ostream& os, const QuicEncryptedPacket& s) {
 647   os << s.length() << "-byte data";
 648   return os;
 649 }
 650
 651 TransmissionInfo::TransmissionInfo()
 652     : retransmittable_frames(nullptr),
 653       sequence_number_length(PACKET_1BYTE_SEQUENCE_NUMBER),
 654       sent_time(QuicTime::Zero()),
 655       bytes_sent(0),
 656       nack_count(0),
 657       transmission_type(NOT_RETRANSMISSION),
 658       all_transmissions(nullptr),
 659       in_flight(false),
 660       is_unackable(false),
 661       is_fec_packet(false) {
 662 }
 663
 664 TransmissionInfo::TransmissionInfo(
 665     RetransmittableFrames* retransmittable_frames,
 666     QuicSequenceNumberLength sequence_number_length,
 667     TransmissionType transmission_type,
 668     QuicTime sent_time,
 669     QuicByteCount bytes_sent,
 670     bool is_fec_packet)
 671     : retransmittable_frames(retransmittable_frames),
 672       sequence_number_length(sequence_number_length),
 673       sent_time(sent_time),
 674       bytes_sent(bytes_sent),
 675       nack_count(0),
 676       transmission_type(transmission_type),
 677       all_transmissions(nullptr),
 678       in_flight(false),
 679       is_unackable(false),
 680       is_fec_packet(is_fec_packet) {
 681 }
 682
 683 }  // namespace net