Move shared files in net/quic/ into net/quic/core/

net/quic/quic_protocol.h

Index: net/quic/quic_protocol.h
diff --git a/net/quic/quic_protocol.h b/net/quic/quic_protocol.h
deleted file mode 100644
index 2b57eafc995b8f743022ad53f3c7506f2e4c4b68..0000000000000000000000000000000000000000
--- a/net/quic/quic_protocol.h
+++ /dev/null
@@ -1,1515 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef NET_QUIC_QUIC_PROTOCOL_H_
-#define NET_QUIC_QUIC_PROTOCOL_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <limits>
-#include <list>
-#include <map>
-#include <memory>
-#include <ostream>
-#include <set>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include "base/logging.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/strings/string_piece.h"
-#include "net/base/int128.h"
-#include "net/base/iovec.h"
-#include "net/base/ip_endpoint.h"
-#include "net/base/net_export.h"
-#include "net/quic/interval_set.h"
-#include "net/quic/quic_bandwidth.h"
-#include "net/quic/quic_time.h"
-#include "net/quic/quic_types.h"
-
-namespace net {
-
-class QuicPacket;
-struct QuicPacketHeader;
-class QuicAckListenerInterface;
-
-typedef uint64_t QuicConnectionId;
-typedef uint32_t QuicStreamId;
-typedef uint64_t QuicStreamOffset;
-typedef uint64_t QuicPacketNumber;
-typedef uint8_t QuicPathId;
-typedef uint64_t QuicPublicResetNonceProof;
-typedef uint8_t QuicPacketEntropyHash;
-typedef uint32_t QuicHeaderId;
-// QuicTag is the type of a tag in the wire protocol.
-typedef uint32_t QuicTag;
-typedef std::vector<QuicTag> QuicTagVector;
-typedef std::map<QuicTag, std::string> QuicTagValueMap;
-typedef uint16_t QuicPacketLength;
-
-// Default initial maximum size in bytes of a QUIC packet.
-const QuicByteCount kDefaultMaxPacketSize = 1350;
-// Default initial maximum size in bytes of a QUIC packet for servers.
-const QuicByteCount kDefaultServerMaxPacketSize = 1000;
-// The maximum packet size of any QUIC packet, based on ethernet's max size,
-// minus the IP and UDP headers. IPv6 has a 40 byte header, UDP adds an
-// additional 8 bytes.  This is a total overhead of 48 bytes.  Ethernet's
-// max packet size is 1500 bytes,  1500 - 48 = 1452.
-const QuicByteCount kMaxPacketSize = 1452;
-// Default maximum packet size used in the Linux TCP implementation.
-// Used in QUIC for congestion window computations in bytes.
-const QuicByteCount kDefaultTCPMSS = 1460;
-
-// We match SPDY's use of 32 (since we'd compete with SPDY).
-const QuicPacketCount kInitialCongestionWindow = 32;
-
-// Minimum size of initial flow control window, for both stream and session.
-const uint32_t kMinimumFlowControlSendWindow = 16 * 1024;  // 16 KB
-
-// Maximum flow control receive window limits for connection and stream.
-const QuicByteCount kStreamReceiveWindowLimit = 16 * 1024 * 1024;   // 16 MB
-const QuicByteCount kSessionReceiveWindowLimit = 24 * 1024 * 1024;  // 24 MB
-
-// Minimum size of the CWND, in packets, when doing bandwidth resumption.
-const QuicPacketCount kMinCongestionWindowForBandwidthResumption = 10;
-
-// Maximum number of tracked packets.
-const QuicPacketCount kMaxTrackedPackets = 10000;
-
-// Default size of the socket receive buffer in bytes.
-const QuicByteCount kDefaultSocketReceiveBuffer = 1024 * 1024;
-// Minimum size of the socket receive buffer in bytes.
-// Smaller values are ignored.
-const QuicByteCount kMinSocketReceiveBuffer = 16 * 1024;
-
-// Fraction of the receive buffer that can be used, based on conservative
-// estimates and testing on Linux.
-// An alternative to kUsableRecieveBufferFraction.
-static const float kConservativeReceiveBufferFraction = 0.6f;
-
-// Don't allow a client to suggest an RTT shorter than 10ms.
-const uint32_t kMinInitialRoundTripTimeUs = 10 * kNumMicrosPerMilli;
-
-// Don't allow a client to suggest an RTT longer than 15 seconds.
-const uint32_t kMaxInitialRoundTripTimeUs = 15 * kNumMicrosPerSecond;
-
-// Maximum number of open streams per connection.
-const size_t kDefaultMaxStreamsPerConnection = 100;
-
-// Number of bytes reserved for public flags in the packet header.
-const size_t kPublicFlagsSize = 1;
-// Number of bytes reserved for version number in the packet header.
-const size_t kQuicVersionSize = 4;
-// Number of bytes reserved for path id in the packet header.
-const size_t kQuicPathIdSize = 1;
-// Number of bytes reserved for private flags in the packet header.
-const size_t kPrivateFlagsSize = 1;
-
-// Signifies that the QuicPacket will contain version of the protocol.
-const bool kIncludeVersion = true;
-// Signifies that the QuicPacket will contain path id.
-const bool kIncludePathId = true;
-// Signifies that the QuicPacket will include a diversification nonce.
-const bool kIncludeDiversificationNonce = true;
-
-// Stream ID is reserved to denote an invalid ID.
-const QuicStreamId kInvalidStreamId = 0;
-
-// Reserved ID for the crypto stream.
-const QuicStreamId kCryptoStreamId = 1;
-
-// Reserved ID for the headers stream.
-const QuicStreamId kHeadersStreamId = 3;
-
-// Header key used to identify final offset on data stream when sending HTTP/2
-// trailing headers over QUIC.
-NET_EXPORT_PRIVATE extern const char* const kFinalOffsetHeaderKey;
-
-// Maximum delayed ack time, in ms.
-const int64_t kMaxDelayedAckTimeMs = 25;
-
-// Minimum tail loss probe time in ms.
-static const int64_t kMinTailLossProbeTimeoutMs = 10;
-
-// The timeout before the handshake succeeds.
-const int64_t kInitialIdleTimeoutSecs = 5;
-// The default idle timeout.
-const int64_t kDefaultIdleTimeoutSecs = 30;
-// The maximum idle timeout that can be negotiated.
-const int64_t kMaximumIdleTimeoutSecs = 60 * 10;  // 10 minutes.
-// The default timeout for a connection until the crypto handshake succeeds.
-const int64_t kMaxTimeForCryptoHandshakeSecs = 10;  // 10 secs.
-
-// Default limit on the number of undecryptable packets the connection buffers
-// before the CHLO/SHLO arrive.
-const size_t kDefaultMaxUndecryptablePackets = 10;
-
-// Default ping timeout.
-const int64_t kPingTimeoutSecs = 15;  // 15 secs.
-
-// Minimum number of RTTs between Server Config Updates (SCUP) sent to client.
-const int kMinIntervalBetweenServerConfigUpdatesRTTs = 10;
-
-// Minimum time between Server Config Updates (SCUP) sent to client.
-const int kMinIntervalBetweenServerConfigUpdatesMs = 1000;
-
-// Minimum number of packets between Server Config Updates (SCUP).
-const int kMinPacketsBetweenServerConfigUpdates = 100;
-
-// The number of open streams that a server will accept is set to be slightly
-// larger than the negotiated limit. Immediately closing the connection if the
-// client opens slightly too many streams is not ideal: the client may have sent
-// a FIN that was lost, and simultaneously opened a new stream. The number of
-// streams a server accepts is a fixed increment over the negotiated limit, or a
-// percentage increase, whichever is larger.
-const float kMaxStreamsMultiplier = 1.1f;
-const int kMaxStreamsMinimumIncrement = 10;
-
-// Available streams are ones with IDs less than the highest stream that has
-// been opened which have neither been opened or reset. The limit on the number
-// of available streams is 10 times the limit on the number of open streams.
-const int kMaxAvailableStreamsMultiplier = 10;
-
-// Track the number of promises that are not yet claimed by a
-// corresponding get.  This must be smaller than
-// kMaxAvailableStreamsMultiplier, because RST on a promised stream my
-// create available streams entries.
-const int kMaxPromisedStreamsMultiplier = kMaxAvailableStreamsMultiplier - 1;
-
-// TCP RFC calls for 1 second RTO however Linux differs from this default and
-// define the minimum RTO to 200ms, we will use the same until we have data to
-// support a higher or lower value.
-static const int64_t kMinRetransmissionTimeMs = 200;
-
-// We define an unsigned 16-bit floating point value, inspired by IEEE floats
-// (http://en.wikipedia.org/wiki/Half_precision_floating-point_format),
-// with 5-bit exponent (bias 1), 11-bit mantissa (effective 12 with hidden
-// bit) and denormals, but without signs, transfinites or fractions. Wire format
-// 16 bits (little-endian byte order) are split into exponent (high 5) and
-// mantissa (low 11) and decoded as:
-//   uint64_t value;
-//   if (exponent == 0) value = mantissa;
-//   else value = (mantissa | 1 << 11) << (exponent - 1)
-const int kUFloat16ExponentBits = 5;
-const int kUFloat16MaxExponent = (1 << kUFloat16ExponentBits) - 2;     // 30
-const int kUFloat16MantissaBits = 16 - kUFloat16ExponentBits;          // 11
-const int kUFloat16MantissaEffectiveBits = kUFloat16MantissaBits + 1;  // 12
-const uint64_t kUFloat16MaxValue =  // 0x3FFC0000000
-    ((UINT64_C(1) << kUFloat16MantissaEffectiveBits) - 1)
-    << kUFloat16MaxExponent;
-
-// Default path ID.
-const QuicPathId kDefaultPathId = 0;
-// Invalid path ID.
-const QuicPathId kInvalidPathId = 0xff;
-
-// kDiversificationNonceSize is the size, in bytes, of the nonce that a server
-// may set in the packet header to ensure that its INITIAL keys are not
-// duplicated.
-const size_t kDiversificationNonceSize = 32;
-
-enum TransmissionType : int8_t {
-  NOT_RETRANSMISSION,
-  FIRST_TRANSMISSION_TYPE = NOT_RETRANSMISSION,
-  HANDSHAKE_RETRANSMISSION,    // Retransmits due to handshake timeouts.
-  ALL_UNACKED_RETRANSMISSION,  // Retransmits all unacked packets.
-  ALL_INITIAL_RETRANSMISSION,  // Retransmits all initially encrypted packets.
-  LOSS_RETRANSMISSION,         // Retransmits due to loss detection.
-  RTO_RETRANSMISSION,          // Retransmits due to retransmit time out.
-  TLP_RETRANSMISSION,          // Tail loss probes.
-  LAST_TRANSMISSION_TYPE = TLP_RETRANSMISSION,
-};
-
-enum HasRetransmittableData : int8_t {
-  NO_RETRANSMITTABLE_DATA,
-  HAS_RETRANSMITTABLE_DATA,
-};
-
-enum IsHandshake : int8_t { NOT_HANDSHAKE, IS_HANDSHAKE };
-
-enum class Perspective { IS_SERVER, IS_CLIENT };
-
-// Describes whether a ConnectionClose was originated by the peer.
-enum class ConnectionCloseSource { FROM_PEER, FROM_SELF };
-
-// Should a connection be closed silently or not.
-enum class ConnectionCloseBehavior {
-  SILENT_CLOSE,
-  SEND_CONNECTION_CLOSE_PACKET
-};
-
-NET_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
-                                            const Perspective& s);
-enum QuicFrameType {
-  // Regular frame types. The values set here cannot change without the
-  // introduction of a new QUIC version.
-  PADDING_FRAME = 0,
-  RST_STREAM_FRAME = 1,
-  CONNECTION_CLOSE_FRAME = 2,
-  GOAWAY_FRAME = 3,
-  WINDOW_UPDATE_FRAME = 4,
-  BLOCKED_FRAME = 5,
-  STOP_WAITING_FRAME = 6,
-  PING_FRAME = 7,
-  PATH_CLOSE_FRAME = 8,
-
-  // STREAM and ACK frames are special frames. They are encoded differently on
-  // the wire and their values do not need to be stable.
-  STREAM_FRAME,
-  ACK_FRAME,
-  // The path MTU discovery frame is encoded as a PING frame on the wire.
-  MTU_DISCOVERY_FRAME,
-  NUM_FRAME_TYPES
-};
-
-enum QuicConnectionIdLength {
-  PACKET_0BYTE_CONNECTION_ID = 0,
-  PACKET_8BYTE_CONNECTION_ID = 8
-};
-
-enum QuicPacketNumberLength : int8_t {
-  PACKET_1BYTE_PACKET_NUMBER = 1,
-  PACKET_2BYTE_PACKET_NUMBER = 2,
-  PACKET_4BYTE_PACKET_NUMBER = 4,
-  PACKET_6BYTE_PACKET_NUMBER = 6
-};
-
-// Used to indicate a QuicSequenceNumberLength using two flag bits.
-enum QuicPacketNumberLengthFlags {
-  PACKET_FLAGS_1BYTE_PACKET = 0,           // 00
-  PACKET_FLAGS_2BYTE_PACKET = 1,           // 01
-  PACKET_FLAGS_4BYTE_PACKET = 1 << 1,      // 10
-  PACKET_FLAGS_6BYTE_PACKET = 1 << 1 | 1,  // 11
-};
-
-// The public flags are specified in one byte.
-enum QuicPacketPublicFlags {
-  PACKET_PUBLIC_FLAGS_NONE = 0,
-
-  // Bit 0: Does the packet header contains version info?
-  PACKET_PUBLIC_FLAGS_VERSION = 1 << 0,
-
-  // Bit 1: Is this packet a public reset packet?
-  PACKET_PUBLIC_FLAGS_RST = 1 << 1,
-
-  // Bit 2: indicates the that public header includes a nonce.
-  PACKET_PUBLIC_FLAGS_NONCE = 1 << 2,
-
-  // Bit 3: indicates whether a ConnectionID is included.
-  PACKET_PUBLIC_FLAGS_0BYTE_CONNECTION_ID = 0,
-  PACKET_PUBLIC_FLAGS_8BYTE_CONNECTION_ID = 1 << 3,
-
-  // QUIC_VERSION_32 and earlier use two bits for an 8 byte
-  // connection id.
-  PACKET_PUBLIC_FLAGS_8BYTE_CONNECTION_ID_OLD = 1 << 3 | 1 << 2,
-
-  // Bits 4 and 5 describe the packet number length as follows:
-  // --00----: 1 byte
-  // --01----: 2 bytes
-  // --10----: 4 bytes
-  // --11----: 6 bytes
-  PACKET_PUBLIC_FLAGS_1BYTE_PACKET = PACKET_FLAGS_1BYTE_PACKET << 4,
-  PACKET_PUBLIC_FLAGS_2BYTE_PACKET = PACKET_FLAGS_2BYTE_PACKET << 4,
-  PACKET_PUBLIC_FLAGS_4BYTE_PACKET = PACKET_FLAGS_4BYTE_PACKET << 4,
-  PACKET_PUBLIC_FLAGS_6BYTE_PACKET = PACKET_FLAGS_6BYTE_PACKET << 4,
-
-  // Bit 6: Does the packet header contain a path id?
-  PACKET_PUBLIC_FLAGS_MULTIPATH = 1 << 6,
-
-  // Reserved, unimplemented flags:
-
-  // Bit 7: indicates the presence of a second flags byte.
-  PACKET_PUBLIC_FLAGS_TWO_OR_MORE_BYTES = 1 << 7,
-
-  // All bits set (bit 7 is not currently used): 01111111
-  PACKET_PUBLIC_FLAGS_MAX = (1 << 7) - 1,
-};
-
-// The private flags are specified in one byte.
-enum QuicPacketPrivateFlags {
-  PACKET_PRIVATE_FLAGS_NONE = 0,
-
-  // Bit 0: Does this packet contain an entropy bit?
-  PACKET_PRIVATE_FLAGS_ENTROPY = 1 << 0,
-
-  // Bit 1: Payload is part of an FEC group?
-  PACKET_PRIVATE_FLAGS_FEC_GROUP = 1 << 1,
-
-  // Bit 2: Payload is FEC as opposed to frames?
-  PACKET_PRIVATE_FLAGS_FEC = 1 << 2,
-
-  // All bits set (bits 3-7 are not currently used): 00000111
-  PACKET_PRIVATE_FLAGS_MAX = (1 << 3) - 1,
-
-  // For version 32 (bits 1-7 are not used): 00000001
-  PACKET_PRIVATE_FLAGS_MAX_VERSION_32 = (1 << 1) - 1
-};
-
-// The available versions of QUIC. Guaranteed that the integer value of the enum
-// will match the version number.
-// When adding a new version to this enum you should add it to
-// kSupportedQuicVersions (if appropriate), and also add a new case to the
-// helper methods QuicVersionToQuicTag, QuicTagToQuicVersion, and
-// QuicVersionToString.
-enum QuicVersion {
-  // Special case to indicate unknown/unsupported QUIC version.
-  QUIC_VERSION_UNSUPPORTED = 0,
-
-  QUIC_VERSION_30 = 30,  // Add server side support of cert transparency.
-  QUIC_VERSION_31 = 31,  // Adds a hash of the client hello to crypto proof.
-  QUIC_VERSION_32 = 32,  // FEC related fields are removed from wire format.
-  QUIC_VERSION_33 = 33,  // Adds diversification nonces.
-  QUIC_VERSION_34 = 34,  // Deprecates entropy, removes private flag from packet
-                         // header, uses new ack and stop waiting wire format.
-  QUIC_VERSION_35 = 35,  // Allows endpoints to independently set stream limit.
-  QUIC_VERSION_36 = 36,  // Add support to force HOL blocking.
-};
-
-// This vector contains QUIC versions which we currently support.
-// This should be ordered such that the highest supported version is the first
-// element, with subsequent elements in descending order (versions can be
-// skipped as necessary).
-//
-// IMPORTANT: if you are adding to this list, follow the instructions at
-// http://sites/quic/adding-and-removing-versions
-static const QuicVersion kSupportedQuicVersions[] = {
-    QUIC_VERSION_36, QUIC_VERSION_35, QUIC_VERSION_34, QUIC_VERSION_33,
-    QUIC_VERSION_32, QUIC_VERSION_31, QUIC_VERSION_30};
-
-typedef std::vector<QuicVersion> QuicVersionVector;
-
-// Returns a vector of QUIC versions in kSupportedQuicVersions.
-NET_EXPORT_PRIVATE QuicVersionVector QuicSupportedVersions();
-
-// Returns a vector of QUIC versions from |versions| which exclude any versions
-// which are disabled by flags.
-NET_EXPORT_PRIVATE QuicVersionVector
-FilterSupportedVersions(QuicVersionVector versions);
-
-// QuicTag is written to and read from the wire, but we prefer to use
-// the more readable QuicVersion at other levels.
-// Helper function which translates from a QuicVersion to a QuicTag. Returns 0
-// if QuicVersion is unsupported.
-NET_EXPORT_PRIVATE QuicTag QuicVersionToQuicTag(const QuicVersion version);
-
-// Returns appropriate QuicVersion from a QuicTag.
-// Returns QUIC_VERSION_UNSUPPORTED if version_tag cannot be understood.
-NET_EXPORT_PRIVATE QuicVersion QuicTagToQuicVersion(const QuicTag version_tag);
-
-// Helper function which translates from a QuicVersion to a string.
-// Returns strings corresponding to enum names (e.g. QUIC_VERSION_6).
-NET_EXPORT_PRIVATE std::string QuicVersionToString(const QuicVersion version);
-
-// Returns comma separated list of string representations of QuicVersion enum
-// values in the supplied |versions| vector.
-NET_EXPORT_PRIVATE std::string QuicVersionVectorToString(
-    const QuicVersionVector& versions);
-
-// Version and Crypto tags are written to the wire with a big-endian
-// representation of the name of the tag.  For example
-// the client hello tag (CHLO) will be written as the
-// following 4 bytes: 'C' 'H' 'L' 'O'.  Since it is
-// stored in memory as a little endian uint32_t, we need
-// to reverse the order of the bytes.
-
-// MakeQuicTag returns a value given the four bytes. For example:
-//   MakeQuicTag('C', 'H', 'L', 'O');
-NET_EXPORT_PRIVATE QuicTag MakeQuicTag(char a, char b, char c, char d);
-
-// Returns true if the tag vector contains the specified tag.
-NET_EXPORT_PRIVATE bool ContainsQuicTag(const QuicTagVector& tag_vector,
-                                        QuicTag tag);
-
-// Size in bytes of the data packet header.
-NET_EXPORT_PRIVATE size_t GetPacketHeaderSize(QuicVersion version,
-                                              const QuicPacketHeader& header);
-
-NET_EXPORT_PRIVATE size_t
-GetPacketHeaderSize(QuicVersion version,
-                    QuicConnectionIdLength connection_id_length,
-                    bool include_version,
-                    bool include_path_id,
-                    bool include_diversification_nonce,
-                    QuicPacketNumberLength packet_number_length);
-
-// Index of the first byte in a QUIC packet of encrypted data.
-NET_EXPORT_PRIVATE size_t
-GetStartOfEncryptedData(QuicVersion version, const QuicPacketHeader& header);
-
-NET_EXPORT_PRIVATE size_t
-GetStartOfEncryptedData(QuicVersion version,
-                        QuicConnectionIdLength connection_id_length,
-                        bool include_version,
-                        bool include_path_id,
-                        bool include_diversification_nonce,
-                        QuicPacketNumberLength packet_number_length);
-
-enum QuicRstStreamErrorCode {
-  // Complete response has been sent, sending a RST to ask the other endpoint
-  // to stop sending request data without discarding the response.
-  QUIC_STREAM_NO_ERROR = 0,
-
-  // There was some error which halted stream processing.
-  QUIC_ERROR_PROCESSING_STREAM,
-  // We got two fin or reset offsets which did not match.
-  QUIC_MULTIPLE_TERMINATION_OFFSETS,
-  // We got bad payload and can not respond to it at the protocol level.
-  QUIC_BAD_APPLICATION_PAYLOAD,
-  // Stream closed due to connection error. No reset frame is sent when this
-  // happens.
-  QUIC_STREAM_CONNECTION_ERROR,
-  // GoAway frame sent. No more stream can be created.
-  QUIC_STREAM_PEER_GOING_AWAY,
-  // The stream has been cancelled.
-  QUIC_STREAM_CANCELLED,
-  // Closing stream locally, sending a RST to allow for proper flow control
-  // accounting. Sent in response to a RST from the peer.
-  QUIC_RST_ACKNOWLEDGEMENT,
-  // Receiver refused to create the stream (because its limit on open streams
-  // has been reached).  The sender should retry the request later (using
-  // another stream).
-  QUIC_REFUSED_STREAM,
-  // Invalid URL in PUSH_PROMISE request header.
-  QUIC_INVALID_PROMISE_URL,
-  // Server is not authoritative for this URL.
-  QUIC_UNAUTHORIZED_PROMISE_URL,
-  // Can't have more than one active PUSH_PROMISE per URL.
-  QUIC_DUPLICATE_PROMISE_URL,
-  // Vary check failed.
-  QUIC_PROMISE_VARY_MISMATCH,
-  // Only GET and HEAD methods allowed.
-  QUIC_INVALID_PROMISE_METHOD,
-  // No error. Used as bound while iterating.
-  QUIC_STREAM_LAST_ERROR,
-};
-// QUIC error codes are encoded to a single octet on-the-wire.
-static_assert(static_cast<int>(QUIC_STREAM_LAST_ERROR) <=
-                  std::numeric_limits<uint8_t>::max(),
-              "QuicErrorCode exceeds single octet");
-
-// Because receiving an unknown QuicRstStreamErrorCode results in connection
-// teardown, we use this to make sure any errors predating a given version are
-// downgraded to the most appropriate existing error.
-NET_EXPORT_PRIVATE QuicRstStreamErrorCode
-AdjustErrorForVersion(QuicRstStreamErrorCode error_code, QuicVersion version);
-
-// These values must remain stable as they are uploaded to UMA histograms.
-// To add a new error code, use the current value of QUIC_LAST_ERROR and
-// increment QUIC_LAST_ERROR.
-enum QuicErrorCode {
-  QUIC_NO_ERROR = 0,
-
-  // Connection has reached an invalid state.
-  QUIC_INTERNAL_ERROR = 1,
-  // There were data frames after the a fin or reset.
-  QUIC_STREAM_DATA_AFTER_TERMINATION = 2,
-  // Control frame is malformed.
-  QUIC_INVALID_PACKET_HEADER = 3,
-  // Frame data is malformed.
-  QUIC_INVALID_FRAME_DATA = 4,
-  // The packet contained no payload.
-  QUIC_MISSING_PAYLOAD = 48,
-  // FEC data is malformed.
-  QUIC_INVALID_FEC_DATA = 5,
-  // STREAM frame data is malformed.
-  QUIC_INVALID_STREAM_DATA = 46,
-  // STREAM frame data overlaps with buffered data.
-  QUIC_OVERLAPPING_STREAM_DATA = 87,
-  // Received STREAM frame data is not encrypted.
-  QUIC_UNENCRYPTED_STREAM_DATA = 61,
-  // Attempt to send unencrypted STREAM frame.
-  QUIC_ATTEMPT_TO_SEND_UNENCRYPTED_STREAM_DATA = 88,
-  // Received a frame which is likely the result of memory corruption.
-  QUIC_MAYBE_CORRUPTED_MEMORY = 89,
-  // FEC frame data is not encrypted.
-  QUIC_UNENCRYPTED_FEC_DATA = 77,
-  // RST_STREAM frame data is malformed.
-  QUIC_INVALID_RST_STREAM_DATA = 6,
-  // CONNECTION_CLOSE frame data is malformed.
-  QUIC_INVALID_CONNECTION_CLOSE_DATA = 7,
-  // GOAWAY frame data is malformed.
-  QUIC_INVALID_GOAWAY_DATA = 8,
-  // WINDOW_UPDATE frame data is malformed.
-  QUIC_INVALID_WINDOW_UPDATE_DATA = 57,
-  // BLOCKED frame data is malformed.
-  QUIC_INVALID_BLOCKED_DATA = 58,
-  // STOP_WAITING frame data is malformed.
-  QUIC_INVALID_STOP_WAITING_DATA = 60,
-  // PATH_CLOSE frame data is malformed.
-  QUIC_INVALID_PATH_CLOSE_DATA = 78,
-  // ACK frame data is malformed.
-  QUIC_INVALID_ACK_DATA = 9,
-
-  // Version negotiation packet is malformed.
-  QUIC_INVALID_VERSION_NEGOTIATION_PACKET = 10,
-  // Public RST packet is malformed.
-  QUIC_INVALID_PUBLIC_RST_PACKET = 11,
-  // There was an error decrypting.
-  QUIC_DECRYPTION_FAILURE = 12,
-  // There was an error encrypting.
-  QUIC_ENCRYPTION_FAILURE = 13,
-  // The packet exceeded kMaxPacketSize.
-  QUIC_PACKET_TOO_LARGE = 14,
-  // The peer is going away.  May be a client or server.
-  QUIC_PEER_GOING_AWAY = 16,
-  // A stream ID was invalid.
-  QUIC_INVALID_STREAM_ID = 17,
-  // A priority was invalid.
-  QUIC_INVALID_PRIORITY = 49,
-  // Too many streams already open.
-  QUIC_TOO_MANY_OPEN_STREAMS = 18,
-  // The peer created too many available streams.
-  QUIC_TOO_MANY_AVAILABLE_STREAMS = 76,
-  // Received public reset for this connection.
-  QUIC_PUBLIC_RESET = 19,
-  // Invalid protocol version.
-  QUIC_INVALID_VERSION = 20,
-
-  // The Header ID for a stream was too far from the previous.
-  QUIC_INVALID_HEADER_ID = 22,
-  // Negotiable parameter received during handshake had invalid value.
-  QUIC_INVALID_NEGOTIATED_VALUE = 23,
-  // There was an error decompressing data.
-  QUIC_DECOMPRESSION_FAILURE = 24,
-  // The connection timed out due to no network activity.
-  QUIC_NETWORK_IDLE_TIMEOUT = 25,
-  // The connection timed out waiting for the handshake to complete.
-  QUIC_HANDSHAKE_TIMEOUT = 67,
-  // There was an error encountered migrating addresses.
-  QUIC_ERROR_MIGRATING_ADDRESS = 26,
-  // There was an error encountered migrating port only.
-  QUIC_ERROR_MIGRATING_PORT = 86,
-  // There was an error while writing to the socket.
-  QUIC_PACKET_WRITE_ERROR = 27,
-  // There was an error while reading from the socket.
-  QUIC_PACKET_READ_ERROR = 51,
-  // We received a STREAM_FRAME with no data and no fin flag set.
-  QUIC_EMPTY_STREAM_FRAME_NO_FIN = 50,
-  // We received invalid data on the headers stream.
-  QUIC_INVALID_HEADERS_STREAM_DATA = 56,
-  // The peer received too much data, violating flow control.
-  QUIC_FLOW_CONTROL_RECEIVED_TOO_MUCH_DATA = 59,
-  // The peer sent too much data, violating flow control.
-  QUIC_FLOW_CONTROL_SENT_TOO_MUCH_DATA = 63,
-  // The peer received an invalid flow control window.
-  QUIC_FLOW_CONTROL_INVALID_WINDOW = 64,
-  // The connection has been IP pooled into an existing connection.
-  QUIC_CONNECTION_IP_POOLED = 62,
-  // The connection has too many outstanding sent packets.
-  QUIC_TOO_MANY_OUTSTANDING_SENT_PACKETS = 68,
-  // The connection has too many outstanding received packets.
-  QUIC_TOO_MANY_OUTSTANDING_RECEIVED_PACKETS = 69,
-  // The quic connection has been cancelled.
-  QUIC_CONNECTION_CANCELLED = 70,
-  // Disabled QUIC because of high packet loss rate.
-  QUIC_BAD_PACKET_LOSS_RATE = 71,
-  // Disabled QUIC because of too many PUBLIC_RESETs post handshake.
-  QUIC_PUBLIC_RESETS_POST_HANDSHAKE = 73,
-  // Disabled QUIC because of too many timeouts with streams open.
-  QUIC_TIMEOUTS_WITH_OPEN_STREAMS = 74,
-  // Closed because we failed to serialize a packet.
-  QUIC_FAILED_TO_SERIALIZE_PACKET = 75,
-  // QUIC timed out after too many RTOs.
-  QUIC_TOO_MANY_RTOS = 85,
-
-  // Crypto errors.
-
-  // Hanshake failed.
-  QUIC_HANDSHAKE_FAILED = 28,
-  // Handshake message contained out of order tags.
-  QUIC_CRYPTO_TAGS_OUT_OF_ORDER = 29,
-  // Handshake message contained too many entries.
-  QUIC_CRYPTO_TOO_MANY_ENTRIES = 30,
-  // Handshake message contained an invalid value length.
-  QUIC_CRYPTO_INVALID_VALUE_LENGTH = 31,
-  // A crypto message was received after the handshake was complete.
-  QUIC_CRYPTO_MESSAGE_AFTER_HANDSHAKE_COMPLETE = 32,
-  // A crypto message was received with an illegal message tag.
-  QUIC_INVALID_CRYPTO_MESSAGE_TYPE = 33,
-  // A crypto message was received with an illegal parameter.
-  QUIC_INVALID_CRYPTO_MESSAGE_PARAMETER = 34,
-  // An invalid channel id signature was supplied.
-  QUIC_INVALID_CHANNEL_ID_SIGNATURE = 52,
-  // A crypto message was received with a mandatory parameter missing.
-  QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND = 35,
-  // A crypto message was received with a parameter that has no overlap
-  // with the local parameter.
-  QUIC_CRYPTO_MESSAGE_PARAMETER_NO_OVERLAP = 36,
-  // A crypto message was received that contained a parameter with too few
-  // values.
-  QUIC_CRYPTO_MESSAGE_INDEX_NOT_FOUND = 37,
-  // An internal error occured in crypto processing.
-  QUIC_CRYPTO_INTERNAL_ERROR = 38,
-  // A crypto handshake message specified an unsupported version.
-  QUIC_CRYPTO_VERSION_NOT_SUPPORTED = 39,
-  // A crypto handshake message resulted in a stateless reject.
-  QUIC_CRYPTO_HANDSHAKE_STATELESS_REJECT = 72,
-  // There was no intersection between the crypto primitives supported by the
-  // peer and ourselves.
-  QUIC_CRYPTO_NO_SUPPORT = 40,
-  // The server rejected our client hello messages too many times.
-  QUIC_CRYPTO_TOO_MANY_REJECTS = 41,
-  // The client rejected the server's certificate chain or signature.
-  QUIC_PROOF_INVALID = 42,
-  // A crypto message was received with a duplicate tag.
-  QUIC_CRYPTO_DUPLICATE_TAG = 43,
-  // A crypto message was received with the wrong encryption level (i.e. it
-  // should have been encrypted but was not.)
-  QUIC_CRYPTO_ENCRYPTION_LEVEL_INCORRECT = 44,
-  // The server config for a server has expired.
-  QUIC_CRYPTO_SERVER_CONFIG_EXPIRED = 45,
-  // We failed to setup the symmetric keys for a connection.
-  QUIC_CRYPTO_SYMMETRIC_KEY_SETUP_FAILED = 53,
-  // A handshake message arrived, but we are still validating the
-  // previous handshake message.
-  QUIC_CRYPTO_MESSAGE_WHILE_VALIDATING_CLIENT_HELLO = 54,
-  // A server config update arrived before the handshake is complete.
-  QUIC_CRYPTO_UPDATE_BEFORE_HANDSHAKE_COMPLETE = 65,
-  // CHLO cannot fit in one packet.
-  QUIC_CRYPTO_CHLO_TOO_LARGE = 90,
-  // This connection involved a version negotiation which appears to have been
-  // tampered with.
-  QUIC_VERSION_NEGOTIATION_MISMATCH = 55,
-
-  // Multipath errors.
-  // Multipath is not enabled, but a packet with multipath flag on is received.
-  QUIC_BAD_MULTIPATH_FLAG = 79,
-  // A path is supposed to exist but does not.
-  QUIC_MULTIPATH_PATH_DOES_NOT_EXIST = 91,
-  // A path is supposed to be active but is not.
-  QUIC_MULTIPATH_PATH_NOT_ACTIVE = 92,
-
-  // IP address changed causing connection close.
-  QUIC_IP_ADDRESS_CHANGED = 80,
-
-  // Connection migration errors.
-  // Network changed, but connection had no migratable streams.
-  QUIC_CONNECTION_MIGRATION_NO_MIGRATABLE_STREAMS = 81,
-  // Connection changed networks too many times.
-  QUIC_CONNECTION_MIGRATION_TOO_MANY_CHANGES = 82,
-  // Connection migration was attempted, but there was no new network to
-  // migrate to.
-  QUIC_CONNECTION_MIGRATION_NO_NEW_NETWORK = 83,
-  // Network changed, but connection had one or more non-migratable streams.
-  QUIC_CONNECTION_MIGRATION_NON_MIGRATABLE_STREAM = 84,
-
-  // No error. Used as bound while iterating.
-  QUIC_LAST_ERROR = 93,
-};
-
-typedef char DiversificationNonce[32];
-
-struct NET_EXPORT_PRIVATE QuicPacketPublicHeader {
-  QuicPacketPublicHeader();
-  explicit QuicPacketPublicHeader(const QuicPacketPublicHeader& other);
-  ~QuicPacketPublicHeader();
-
-  // Universal header. All QuicPacket headers will have a connection_id and
-  // public flags.
-  QuicConnectionId connection_id;
-  QuicConnectionIdLength connection_id_length;
-  bool multipath_flag;
-  bool reset_flag;
-  bool version_flag;
-  QuicPacketNumberLength packet_number_length;
-  QuicVersionVector versions;
-  // nonce contains an optional, 32-byte nonce value. If not included in the
-  // packet, |nonce| will be empty.
-  DiversificationNonce* nonce;
-};
-
-// An integer which cannot be a packet number.
-const QuicPacketNumber kInvalidPacketNumber = 0;
-
-// Header for Data packets.
-struct NET_EXPORT_PRIVATE QuicPacketHeader {
-  QuicPacketHeader();
-  explicit QuicPacketHeader(const QuicPacketPublicHeader& header);
-  QuicPacketHeader(const QuicPacketHeader& other);
-
-  NET_EXPORT_PRIVATE friend std::ostream& operator<<(std::ostream& os,
-                                                     const QuicPacketHeader& s);
-
-  QuicPacketPublicHeader public_header;
-  QuicPacketNumber packet_number;
-  QuicPathId path_id;
-  bool entropy_flag;
-  QuicPacketEntropyHash entropy_hash;
-  bool fec_flag;
-};
-
-struct NET_EXPORT_PRIVATE QuicPublicResetPacket {
-  QuicPublicResetPacket();
-  explicit QuicPublicResetPacket(const QuicPacketPublicHeader& header);
-
-  QuicPacketPublicHeader public_header;
-  QuicPublicResetNonceProof nonce_proof;
-  QuicPacketNumber rejected_packet_number;
-  IPEndPoint client_address;
-};
-
-enum QuicVersionNegotiationState {
-  START_NEGOTIATION = 0,
-  // Server-side this implies we've sent a version negotiation packet and are
-  // waiting on the client to select a compatible version.  Client-side this
-  // implies we've gotten a version negotiation packet, are retransmitting the
-  // initial packets with a supported version and are waiting for our first
-  // packet from the server.
-  NEGOTIATION_IN_PROGRESS,
-  // This indicates this endpoint has received a packet from the peer with a
-  // version this endpoint supports.  Version negotiation is complete, and the
-  // version number will no longer be sent with future packets.
-  NEGOTIATED_VERSION
-};
-
-typedef QuicPacketPublicHeader QuicVersionNegotiationPacket;
-
-// A padding frame contains no payload.
-struct NET_EXPORT_PRIVATE QuicPaddingFrame {
-  QuicPaddingFrame() : num_padding_bytes(-1) {}
-  explicit QuicPaddingFrame(int num_padding_bytes)
-      : num_padding_bytes(num_padding_bytes) {}
-
-  NET_EXPORT_PRIVATE friend std::ostream& operator<<(std::ostream& os,
-                                                     const QuicPaddingFrame& s);
-
-  // -1: full padding to the end of a max-sized packet
-  // otherwise: only pad up to num_padding_bytes bytes
-  int num_padding_bytes;
-};
-
-// A ping frame contains no payload, though it is retransmittable,
-// and ACK'd just like other normal frames.
-struct NET_EXPORT_PRIVATE QuicPingFrame {};
-
-// A path MTU discovery frame contains no payload and is serialized as a ping
-// frame.
-struct NET_EXPORT_PRIVATE QuicMtuDiscoveryFrame {};
-
-class NET_EXPORT_PRIVATE QuicBufferAllocator {
- public:
-  virtual ~QuicBufferAllocator();
-
-  // Returns or allocates a new buffer of |size|. Never returns null.
-  virtual char* New(size_t size) = 0;
-
-  // Returns or allocates a new buffer of |size| if |flag_enable| is true.
-  // Otherwise, returns a buffer that is compatible with this class directly
-  // with operator new. Never returns null.
-  virtual char* New(size_t size, bool flag_enable) = 0;
-
-  // Releases a buffer.
-  virtual void Delete(char* buffer) = 0;
-
-  // Marks the allocator as being idle. Serves as a hint to notify the allocator
-  // that it should release any resources it's still holding on to.
-  virtual void MarkAllocatorIdle() {}
-};
-
-// Deleter for stream buffers. Copyable to support platforms where the deleter
-// of a unique_ptr must be copyable. Otherwise it would be nice for this to be
-// move-only.
-class NET_EXPORT_PRIVATE StreamBufferDeleter {
- public:
-  StreamBufferDeleter() : allocator_(nullptr) {}
-  explicit StreamBufferDeleter(QuicBufferAllocator* allocator)
-      : allocator_(allocator) {}
-
-  // Deletes |buffer| using |allocator_|.
-  void operator()(char* buffer) const;
-
- private:
-  // Not owned; must be valid so long as the buffer stored in the unique_ptr
-  // that owns |this| is valid.
-  QuicBufferAllocator* allocator_;
-};
-
-using UniqueStreamBuffer = std::unique_ptr<char[], StreamBufferDeleter>;
-
-// Allocates memory of size |size| using |allocator| for a QUIC stream buffer.
-NET_EXPORT_PRIVATE UniqueStreamBuffer
-NewStreamBuffer(QuicBufferAllocator* allocator, size_t size);
-
-struct NET_EXPORT_PRIVATE QuicStreamFrame {
-  QuicStreamFrame();
-  QuicStreamFrame(QuicStreamId stream_id,
-                  bool fin,
-                  QuicStreamOffset offset,
-                  base::StringPiece data);
-  QuicStreamFrame(QuicStreamId stream_id,
-                  bool fin,
-                  QuicStreamOffset offset,
-                  QuicPacketLength data_length,
-                  UniqueStreamBuffer buffer);
-  ~QuicStreamFrame();
-
-  NET_EXPORT_PRIVATE friend std::ostream& operator<<(std::ostream& os,
-                                                     const QuicStreamFrame& s);
-
-  QuicStreamId stream_id;
-  bool fin;
-  QuicPacketLength data_length;
-  const char* data_buffer;
-  QuicStreamOffset offset;  // Location of this data in the stream.
-  // nullptr when the QuicStreamFrame is received, and non-null when sent.
-  UniqueStreamBuffer buffer;
-
- private:
-  QuicStreamFrame(QuicStreamId stream_id,
-                  bool fin,
-                  QuicStreamOffset offset,
-                  const char* data_buffer,
-                  QuicPacketLength data_length,
-                  UniqueStreamBuffer buffer);
-
-  DISALLOW_COPY_AND_ASSIGN(QuicStreamFrame);
-};
-static_assert(sizeof(QuicStreamFrame) <= 64,
-              "Keep the QuicStreamFrame size to a cacheline.");
-
-typedef std::vector<std::pair<QuicPacketNumber, QuicTime>> PacketTimeVector;
-
-struct NET_EXPORT_PRIVATE QuicStopWaitingFrame {
-  QuicStopWaitingFrame();
-  ~QuicStopWaitingFrame();
-
-  NET_EXPORT_PRIVATE friend std::ostream& operator<<(
-      std::ostream& os,
-      const QuicStopWaitingFrame& s);
-  // Path which this stop waiting frame belongs to.
-  QuicPathId path_id;
-  // Entropy hash of all packets up to, but not including, the least unacked
-  // packet.
-  QuicPacketEntropyHash entropy_hash;
-  // The lowest packet we've sent which is unacked, and we expect an ack for.
-  QuicPacketNumber least_unacked;
-};
-
-// A sequence of packet numbers where each number is unique. Intended to be used
-// in a sliding window fashion, where smaller old packet numbers are removed and
-// larger new packet numbers are added, with the occasional random access.
-class NET_EXPORT_PRIVATE PacketNumberQueue {
- public:
-  using const_interval_iterator = IntervalSet<QuicPacketNumber>::const_iterator;
-  using const_reverse_interval_iterator =
-      IntervalSet<QuicPacketNumber>::const_reverse_iterator;
-  // TODO(jdorfman): remove const_iterator and change the callers to iterate
-  // over the intervals.
-  class NET_EXPORT_PRIVATE const_iterator
-      : public std::iterator<std::input_iterator_tag,
-                             QuicPacketNumber,
-                             std::ptrdiff_t,
-                             const QuicPacketNumber*,
-                             const QuicPacketNumber&> {
-   public:
-    const_iterator(
-        IntervalSet<QuicPacketNumber>::const_iterator interval_set_iter,
-        QuicPacketNumber first,
-        QuicPacketNumber last);
-    const_iterator(const const_iterator& other);
-    const_iterator& operator=(const const_iterator& other);
-    // TODO(rtenneti): on windows RValue reference gives errors.
-    // const_iterator(const_iterator&& other);
-    ~const_iterator();
-
-    // TODO(rtenneti): on windows RValue reference gives errors.
-    // const_iterator& operator=(const_iterator&& other);
-    bool operator!=(const const_iterator& other) const;
-    bool operator==(const const_iterator& other) const;
-    value_type operator*() const;
-    const_iterator& operator++();
-    const_iterator operator++(int /* postincrement */);
-
-   private:
-    IntervalSet<QuicPacketNumber>::const_iterator interval_set_iter_;
-    QuicPacketNumber current_;
-    QuicPacketNumber last_;
-  };
-
-  PacketNumberQueue();
-  PacketNumberQueue(const PacketNumberQueue& other);
-  // TODO(rtenneti): on windows RValue reference gives errors.
-  // PacketNumberQueue(PacketNumberQueue&& other);
-  ~PacketNumberQueue();
-
-  PacketNumberQueue& operator=(const PacketNumberQueue& other);
-  // PacketNumberQueue& operator=(PacketNumberQueue&& other);
-
-  // Adds |packet_number| to the set of packets in the queue.
-  void Add(QuicPacketNumber packet_number);
-
-  // Adds packets between [lower, higher) to the set of packets in the queue. It
-  // is undefined behavior to call this with |higher| < |lower|.
-  void Add(QuicPacketNumber lower, QuicPacketNumber higher);
-
-  // Removes |packet_number| from the set of packets in the queue.
-  void Remove(QuicPacketNumber packet_number);
-
-  // Removes packets numbers between [lower, higher) to the set of packets in
-  // the queue. It is undefined behavior to call this with |higher| < |lower|.
-  void Remove(QuicPacketNumber lower, QuicPacketNumber higher);
-
-  // Removes packets with values less than |higher| from the set of packets in
-  // the queue. Returns true if packets were removed.
-  bool RemoveUpTo(QuicPacketNumber higher);
-
-  // Mutates packet number set so that it contains only those packet numbers
-  // from minimum to maximum packet number not currently in the set. Do nothing
-  // if packet number set is empty.
-  void Complement();
-
-  // Returns true if the queue contains |packet_number|.
-  bool Contains(QuicPacketNumber packet_number) const;
-
-  // Returns true if the queue is empty.
-  bool Empty() const;
-
-  // Returns the minimum packet number stored in the queue. It is undefined
-  // behavior to call this if the queue is empty.
-  QuicPacketNumber Min() const;
-
-  // Returns the maximum packet number stored in the queue. It is undefined
-  // behavior to call this if the queue is empty.
-  QuicPacketNumber Max() const;
-
-  // Returns the number of unique packets stored in the queue. Inefficient; only
-  // exposed for testing.
-  size_t NumPacketsSlow() const;
-
-  // Returns the number of disjoint packet number intervals contained in the
-  // queue.
-  size_t NumIntervals() const;
-
-  // Returns the length of last interval.
-  QuicPacketNumber LastIntervalLength() const;
-
-  // Returns iterators over the individual packet numbers.
-  const_iterator begin() const;
-  const_iterator end() const;
-  const_iterator lower_bound(QuicPacketNumber packet_number) const;
-
-  NET_EXPORT_PRIVATE friend std::ostream& operator<<(
-      std::ostream& os,
-      const PacketNumberQueue& q);
-
-  // Returns iterators over the packet number intervals.
-  const_interval_iterator begin_intervals() const;
-  const_interval_iterator end_intervals() const;
-  const_reverse_interval_iterator rbegin_intervals() const;
-  const_reverse_interval_iterator rend_intervals() const;
-
- private:
-  IntervalSet<QuicPacketNumber> packet_number_intervals_;
-};
-
-struct NET_EXPORT_PRIVATE QuicAckFrame {
-  QuicAckFrame();
-  QuicAckFrame(const QuicAckFrame& other);
-  ~QuicAckFrame();
-
-  NET_EXPORT_PRIVATE friend std::ostream& operator<<(std::ostream& os,
-                                                     const QuicAckFrame& s);
-
-  // The highest packet number we've observed from the peer.
-  //
-  // In general, this should be the largest packet number we've received.  In
-  // the case of truncated acks, we may have to advertise a lower "upper bound"
-  // than largest received, to avoid implicitly acking missing packets that
-  // don't fit in the missing packet list due to size limitations.  In this
-  // case, largest_observed may be a packet which is also in the missing packets
-  // list.
-  QuicPacketNumber largest_observed;
-
-  // Time elapsed since largest_observed was received until this Ack frame was
-  // sent.
-  QuicTime::Delta ack_delay_time;
-
-  // Vector of <packet_number, time> for when packets arrived.
-  PacketTimeVector received_packet_times;
-
-  // Set of packets.
-  PacketNumberQueue packets;
-
-  // Path which this ack belongs to.
-  QuicPathId path_id;
-
-  // Entropy hash of all packets up to largest observed not including missing
-  // packets.
-  QuicPacketEntropyHash entropy_hash;
-
-  // Whether the ack had to be truncated when sent.
-  bool is_truncated;
-
-  // If true, |packets| express missing packets. Otherwise, |packets| express
-  // received packets.
-  bool missing;
-};
-
-// True if the packet number is greater than largest_observed or is listed
-// as missing.
-// Always returns false for packet numbers less than least_unacked.
-bool NET_EXPORT_PRIVATE
-IsAwaitingPacket(const QuicAckFrame& ack_frame,
-                 QuicPacketNumber packet_number,
-                 QuicPacketNumber peer_least_packet_awaiting_ack);
-
-// Defines for all types of congestion control algorithms that can be used in
-// QUIC. Note that this is separate from the congestion feedback type -
-// some congestion control algorithms may use the same feedback type
-// (Reno and Cubic are the classic example for that).
-enum CongestionControlType {
-  kCubic,
-  kCubicBytes,
-  kReno,
-  kRenoBytes,
-  kBBR,
-};
-
-enum LossDetectionType {
-  kNack,          // Used to mimic TCP's loss detection.
-  kTime,          // Time based loss detection.
-  kAdaptiveTime,  // Adaptive time based loss detection.
-};
-
-struct NET_EXPORT_PRIVATE QuicRstStreamFrame {
-  QuicRstStreamFrame();
-  QuicRstStreamFrame(QuicStreamId stream_id,
-                     QuicRstStreamErrorCode error_code,
-                     QuicStreamOffset bytes_written);
-
-  NET_EXPORT_PRIVATE friend std::ostream& operator<<(
-      std::ostream& os,
-      const QuicRstStreamFrame& r);
-
-  QuicStreamId stream_id;
-  QuicRstStreamErrorCode error_code;
-
-  // Used to update flow control windows. On termination of a stream, both
-  // endpoints must inform the peer of the number of bytes they have sent on
-  // that stream. This can be done through normal termination (data packet with
-  // FIN) or through a RST.
-  QuicStreamOffset byte_offset;
-};
-
-struct NET_EXPORT_PRIVATE QuicConnectionCloseFrame {
-  QuicConnectionCloseFrame();
-
-  NET_EXPORT_PRIVATE friend std::ostream& operator<<(
-      std::ostream& os,
-      const QuicConnectionCloseFrame& c);
-
-  QuicErrorCode error_code;
-  std::string error_details;
-};
-
-struct NET_EXPORT_PRIVATE QuicGoAwayFrame {
-  QuicGoAwayFrame();
-  QuicGoAwayFrame(QuicErrorCode error_code,
-                  QuicStreamId last_good_stream_id,
-                  const std::string& reason);
-
-  NET_EXPORT_PRIVATE friend std::ostream& operator<<(std::ostream& os,
-                                                     const QuicGoAwayFrame& g);
-
-  QuicErrorCode error_code;
-  QuicStreamId last_good_stream_id;
-  std::string reason_phrase;
-};
-
-// Flow control updates per-stream and at the connection levoel.
-// Based on SPDY's WINDOW_UPDATE frame, but uses an absolute byte offset rather
-// than a window delta.
-// TODO(rjshade): A possible future optimization is to make stream_id and
-//                byte_offset variable length, similar to stream frames.
-struct NET_EXPORT_PRIVATE QuicWindowUpdateFrame {
-  QuicWindowUpdateFrame() {}
-  QuicWindowUpdateFrame(QuicStreamId stream_id, QuicStreamOffset byte_offset);
-
-  NET_EXPORT_PRIVATE friend std::ostream& operator<<(
-      std::ostream& os,
-      const QuicWindowUpdateFrame& w);
-
-  // The stream this frame applies to.  0 is a special case meaning the overall
-  // connection rather than a specific stream.
-  QuicStreamId stream_id;
-
-  // Byte offset in the stream or connection. The receiver of this frame must
-  // not send data which would result in this offset being exceeded.
-  QuicStreamOffset byte_offset;
-};
-
-// The BLOCKED frame is used to indicate to the remote endpoint that this
-// endpoint believes itself to be flow-control blocked but otherwise ready to
-// send data. The BLOCKED frame is purely advisory and optional.
-// Based on SPDY's BLOCKED frame (undocumented as of 2014-01-28).
-struct NET_EXPORT_PRIVATE QuicBlockedFrame {
-  QuicBlockedFrame() {}
-  explicit QuicBlockedFrame(QuicStreamId stream_id);
-
-  NET_EXPORT_PRIVATE friend std::ostream& operator<<(std::ostream& os,
-                                                     const QuicBlockedFrame& b);
-
-  // The stream this frame applies to.  0 is a special case meaning the overall
-  // connection rather than a specific stream.
-  QuicStreamId stream_id;
-};
-
-// The PATH_CLOSE frame is used to explicitly close a path. Both endpoints can
-// send a PATH_CLOSE frame to initiate a path termination. A path is considered
-// to be closed either a PATH_CLOSE frame is sent or received. An endpoint drops
-// receive side of a closed path, and packets with retransmittable frames on a
-// closed path are marked as retransmissions which will be transmitted on other
-// paths.
-struct NET_EXPORT_PRIVATE QuicPathCloseFrame {
-  QuicPathCloseFrame() {}
-  explicit QuicPathCloseFrame(QuicPathId path_id);
-
-  NET_EXPORT_PRIVATE friend std::ostream& operator<<(
-      std::ostream& os,
-      const QuicPathCloseFrame& p);
-
-  QuicPathId path_id;
-};
-
-// EncryptionLevel enumerates the stages of encryption that a QUIC connection
-// progresses through. When retransmitting a packet, the encryption level needs
-// to be specified so that it is retransmitted at a level which the peer can
-// understand.
-enum EncryptionLevel : int8_t {
-  ENCRYPTION_NONE = 0,
-  ENCRYPTION_INITIAL = 1,
-  ENCRYPTION_FORWARD_SECURE = 2,
-
-  NUM_ENCRYPTION_LEVELS,
-};
-
-enum PeerAddressChangeType {
-  // IP address and port remain unchanged.
-  NO_CHANGE,
-  // Port changed, but IP address remains unchanged.
-  PORT_CHANGE,
-  // IPv4 address changed, but within the /24 subnet (port may have changed.)
-  IPV4_SUBNET_CHANGE,
-  // IP address change from an IPv4 to an IPv6 address (port may have changed.)
-  IPV4_TO_IPV6_CHANGE,
-  // IP address change from an IPv6 to an IPv4 address (port may have changed.)
-  IPV6_TO_IPV4_CHANGE,
-  // IP address change from an IPv6 to an IPv6 address (port may have changed.)
-  IPV6_TO_IPV6_CHANGE,
-  // All other peer address changes.
-  UNSPECIFIED_CHANGE,
-};
-
-struct NET_EXPORT_PRIVATE QuicFrame {
-  QuicFrame();
-  explicit QuicFrame(QuicPaddingFrame padding_frame);
-  explicit QuicFrame(QuicMtuDiscoveryFrame frame);
-  explicit QuicFrame(QuicPingFrame frame);
-
-  explicit QuicFrame(QuicStreamFrame* stream_frame);
-  explicit QuicFrame(QuicAckFrame* frame);
-  explicit QuicFrame(QuicRstStreamFrame* frame);
-  explicit QuicFrame(QuicConnectionCloseFrame* frame);
-  explicit QuicFrame(QuicStopWaitingFrame* frame);
-  explicit QuicFrame(QuicGoAwayFrame* frame);
-  explicit QuicFrame(QuicWindowUpdateFrame* frame);
-  explicit QuicFrame(QuicBlockedFrame* frame);
-  explicit QuicFrame(QuicPathCloseFrame* frame);
-
-  NET_EXPORT_PRIVATE friend std::ostream& operator<<(std::ostream& os,
-                                                     const QuicFrame& frame);
-
-  QuicFrameType type;
-  union {
-    // Frames smaller than a pointer are inline.
-    QuicPaddingFrame padding_frame;
-    QuicMtuDiscoveryFrame mtu_discovery_frame;
-    QuicPingFrame ping_frame;
-
-    // Frames larger than a pointer.
-    QuicStreamFrame* stream_frame;
-    QuicAckFrame* ack_frame;
-    QuicStopWaitingFrame* stop_waiting_frame;
-    QuicRstStreamFrame* rst_stream_frame;
-    QuicConnectionCloseFrame* connection_close_frame;
-    QuicGoAwayFrame* goaway_frame;
-    QuicWindowUpdateFrame* window_update_frame;
-    QuicBlockedFrame* blocked_frame;
-    QuicPathCloseFrame* path_close_frame;
-  };
-};
-// QuicFrameType consumes 8 bytes with padding.
-static_assert(sizeof(QuicFrame) <= 16,
-              "Frames larger than 8 bytes should be referenced by pointer.");
-
-typedef std::vector<QuicFrame> QuicFrames;
-
-class NET_EXPORT_PRIVATE QuicData {
- public:
-  QuicData(const char* buffer, size_t length);
-  QuicData(char* buffer, size_t length, bool owns_buffer);
-  virtual ~QuicData();
-
-  base::StringPiece AsStringPiece() const {
-    return base::StringPiece(data(), length());
-  }
-
-  const char* data() const { return buffer_; }
-  size_t length() const { return length_; }
-  bool owns_buffer() const { return owns_buffer_; }
-
- private:
-  const char* buffer_;
-  size_t length_;
-  bool owns_buffer_;
-
-  DISALLOW_COPY_AND_ASSIGN(QuicData);
-};
-
-class NET_EXPORT_PRIVATE QuicPacket : public QuicData {
- public:
-  // TODO(fayang): 4 fields from public header are passed in as arguments.
-  // Consider to add a convenience method which directly accepts the entire
-  // public header.
-  QuicPacket(char* buffer,
-             size_t length,
-             bool owns_buffer,
-             QuicConnectionIdLength connection_id_length,
-             bool includes_version,
-             bool includes_path_id,
-             bool includes_diversification_nonce,
-             QuicPacketNumberLength packet_number_length);
-
-  base::StringPiece AssociatedData(QuicVersion version) const;
-  base::StringPiece Plaintext(QuicVersion version) const;
-
-  char* mutable_data() { return buffer_; }
-
- private:
-  char* buffer_;
-  const QuicConnectionIdLength connection_id_length_;
-  const bool includes_version_;
-  const bool includes_path_id_;
-  const bool includes_diversification_nonce_;
-  const QuicPacketNumberLength packet_number_length_;
-
-  DISALLOW_COPY_AND_ASSIGN(QuicPacket);
-};
-
-class NET_EXPORT_PRIVATE QuicEncryptedPacket : public QuicData {
- public:
-  QuicEncryptedPacket(const char* buffer, size_t length);
-  QuicEncryptedPacket(char* buffer, size_t length, bool owns_buffer);
-
-  // Clones the packet into a new packet which owns the buffer.
-  QuicEncryptedPacket* Clone() const;
-
-  // By default, gtest prints the raw bytes of an object. The bool data
-  // member (in the base class QuicData) causes this object to have padding
-  // bytes, which causes the default gtest object printer to read
-  // uninitialize memory. So we need to teach gtest how to print this object.
-  NET_EXPORT_PRIVATE friend std::ostream& operator<<(
-      std::ostream& os,
-      const QuicEncryptedPacket& s);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(QuicEncryptedPacket);
-};
-
-// A received encrypted QUIC packet, with a recorded time of receipt.
-class NET_EXPORT_PRIVATE QuicReceivedPacket : public QuicEncryptedPacket {
- public:
-  QuicReceivedPacket(const char* buffer, size_t length, QuicTime receipt_time);
-  QuicReceivedPacket(char* buffer,
-                     size_t length,
-                     QuicTime receipt_time,
-                     bool owns_buffer);
-
-  // Clones the packet into a new packet which owns the buffer.
-  QuicReceivedPacket* Clone() const;
-
-  // Returns the time at which the packet was received.
-  QuicTime receipt_time() const { return receipt_time_; }
-
-  // By default, gtest prints the raw bytes of an object. The bool data
-  // member (in the base class QuicData) causes this object to have padding
-  // bytes, which causes the default gtest object printer to read
-  // uninitialize memory. So we need to teach gtest how to print this object.
-  NET_EXPORT_PRIVATE friend std::ostream& operator<<(
-      std::ostream& os,
-      const QuicReceivedPacket& s);
-
- private:
-  const QuicTime receipt_time_;
-
-  DISALLOW_COPY_AND_ASSIGN(QuicReceivedPacket);
-};
-
-// Pure virtual class to listen for packet acknowledgements.
-class NET_EXPORT_PRIVATE QuicAckListenerInterface
-    : public base::RefCounted<QuicAckListenerInterface> {
- public:
-  QuicAckListenerInterface() {}
-
-  // Called when a packet is acked.  Called once per packet.
-  // |acked_bytes| is the number of data bytes acked.
-  virtual void OnPacketAcked(int acked_bytes,
-                             QuicTime::Delta ack_delay_time) = 0;
-
-  // Called when a packet is retransmitted.  Called once per packet.
-  // |retransmitted_bytes| is the number of data bytes retransmitted.
-  virtual void OnPacketRetransmitted(int retransmitted_bytes) = 0;
-
- protected:
-  friend class base::RefCounted<QuicAckListenerInterface>;
-
-  // Delegates are ref counted.
-  virtual ~QuicAckListenerInterface() {}
-};
-
-// Pure virtual class to close connection on unrecoverable errors.
-class NET_EXPORT_PRIVATE QuicConnectionCloseDelegateInterface {
- public:
-  virtual ~QuicConnectionCloseDelegateInterface() {}
-
-  // Called when an unrecoverable error is encountered.
-  virtual void OnUnrecoverableError(QuicErrorCode error,
-                                    const std::string& error_details,
-                                    ConnectionCloseSource source) = 0;
-};
-
-struct NET_EXPORT_PRIVATE AckListenerWrapper {
-  AckListenerWrapper(QuicAckListenerInterface* listener,
-                     QuicPacketLength data_length);
-  AckListenerWrapper(const AckListenerWrapper& other);
-  ~AckListenerWrapper();
-
-  scoped_refptr<QuicAckListenerInterface> ack_listener;
-  QuicPacketLength length;
-};
-
-struct NET_EXPORT_PRIVATE SerializedPacket {
-  SerializedPacket(QuicPathId path_id,
-                   QuicPacketNumber packet_number,
-                   QuicPacketNumberLength packet_number_length,
-                   const char* encrypted_buffer,
-                   QuicPacketLength encrypted_length,
-                   QuicPacketEntropyHash entropy_hash,
-                   bool has_ack,
-                   bool has_stop_waiting);
-  SerializedPacket(const SerializedPacket& other);
-  ~SerializedPacket();
-
-  // Not owned.
-  const char* encrypted_buffer;
-  QuicPacketLength encrypted_length;
-  QuicFrames retransmittable_frames;
-  IsHandshake has_crypto_handshake;
-  // -1: full padding to the end of a max-sized packet
-  //  0: no padding
-  //  otherwise: only pad up to num_padding_bytes bytes
-  int16_t num_padding_bytes;
-  QuicPathId path_id;
-  QuicPacketNumber packet_number;
-  QuicPacketNumberLength packet_number_length;
-  EncryptionLevel encryption_level;
-  QuicPacketEntropyHash entropy_hash;
-  bool has_ack;
-  bool has_stop_waiting;
-  TransmissionType transmission_type;
-  QuicPathId original_path_id;
-  QuicPacketNumber original_packet_number;
-
-  // Optional notifiers which will be informed when this packet has been ACKed.
-  std::list<AckListenerWrapper> listeners;
-};
-
-struct NET_EXPORT_PRIVATE TransmissionInfo {
-  // Used by STL when assigning into a map.
-  TransmissionInfo();
-
-  // Constructs a Transmission with a new all_transmissions set
-  // containing |packet_number|.
-  TransmissionInfo(EncryptionLevel level,
-                   QuicPacketNumberLength packet_number_length,
-                   TransmissionType transmission_type,
-                   QuicTime sent_time,
-                   QuicPacketLength bytes_sent,
-                   bool has_crypto_handshake,
-                   int num_padding_bytes);
-
-  TransmissionInfo(const TransmissionInfo& other);
-
-  ~TransmissionInfo();
-
-  QuicFrames retransmittable_frames;
-  EncryptionLevel encryption_level;
-  QuicPacketNumberLength packet_number_length;
-  QuicPacketLength bytes_sent;
-  QuicTime sent_time;
-  // Reason why this packet was transmitted.
-  TransmissionType transmission_type;
-  // In flight packets have not been abandoned or lost.
-  bool in_flight;
-  // True if the packet can never be acked, so it can be removed.  Occurs when
-  // a packet is never sent, after it is acknowledged once, or if it's a crypto
-  // packet we never expect to receive an ack for.
-  bool is_unackable;
-  // True if the packet contains stream data from the crypto stream.
-  bool has_crypto_handshake;
-  // Non-zero if the packet needs padding if it's retransmitted.
-  int16_t num_padding_bytes;
-  // Stores the packet number of the next retransmission of this packet.
-  // Zero if the packet has not been retransmitted.
-  QuicPacketNumber retransmission;
-  // Non-empty if there is a listener for this packet.
-  std::list<AckListenerWrapper> ack_listeners;
-};
-
-// Struct to store the pending retransmission information.
-struct PendingRetransmission {
-  PendingRetransmission(QuicPathId path_id,
-                        QuicPacketNumber packet_number,
-                        TransmissionType transmission_type,
-                        const QuicFrames& retransmittable_frames,
-                        bool has_crypto_handshake,
-                        int num_padding_bytes,
-                        EncryptionLevel encryption_level,
-                        QuicPacketNumberLength packet_number_length)
-      : packet_number(packet_number),
-        retransmittable_frames(retransmittable_frames),
-        transmission_type(transmission_type),
-        path_id(path_id),
-        has_crypto_handshake(has_crypto_handshake),
-        num_padding_bytes(num_padding_bytes),
-        encryption_level(encryption_level),
-        packet_number_length(packet_number_length) {}
-
-  QuicPacketNumber packet_number;
-  const QuicFrames& retransmittable_frames;
-  TransmissionType transmission_type;
-  QuicPathId path_id;
-  bool has_crypto_handshake;
-  int num_padding_bytes;
-  EncryptionLevel encryption_level;
-  QuicPacketNumberLength packet_number_length;
-};
-
-// Convenience wrapper to wrap an iovec array and the total length, which must
-// be less than or equal to the actual total length of the iovecs.
-struct NET_EXPORT_PRIVATE QuicIOVector {
-  QuicIOVector(const struct iovec* iov, int iov_count, size_t total_length)
-      : iov(iov), iov_count(iov_count), total_length(total_length) {}
-
-  const struct iovec* iov;
-  const int iov_count;
-  const size_t total_length;
-};
-
-}  // namespace net
-
-#endif  // NET_QUIC_QUIC_PROTOCOL_H_