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.
5 #ifndef NET_QUIC_QUIC_PROTOCOL_H_
6 #define NET_QUIC_QUIC_PROTOCOL_H_
17 #include "base/basictypes.h"
18 #include "base/containers/hash_tables.h"
19 #include "base/logging.h"
20 #include "base/strings/string_piece.h"
21 #include "net/base/int128.h"
22 #include "net/base/net_export.h"
23 #include "net/quic/quic_bandwidth.h"
24 #include "net/quic/quic_time.h"
30 class QuicAckNotifier;
32 struct QuicPacketHeader;
34 typedef uint64 QuicGuid;
35 typedef uint32 QuicStreamId;
36 typedef uint64 QuicStreamOffset;
37 typedef uint64 QuicPacketSequenceNumber;
38 typedef QuicPacketSequenceNumber QuicFecGroupNumber;
39 typedef uint64 QuicPublicResetNonceProof;
40 typedef uint8 QuicPacketEntropyHash;
41 typedef uint32 QuicHeaderId;
42 // QuicTag is the type of a tag in the wire protocol.
43 typedef uint32 QuicTag;
44 typedef std::vector<QuicTag> QuicTagVector;
45 typedef uint32 QuicPriority;
47 // TODO(rch): Consider Quic specific names for these constants.
48 // Default and initial maximum size in bytes of a QUIC packet.
49 const QuicByteCount kDefaultMaxPacketSize = 1200;
50 // The maximum packet size of any QUIC packet, based on ethernet's max size,
51 // minus the IP and UDP headers.
52 const QuicByteCount kMaxPacketSize = 1472;
54 // Maximum size of the initial congestion window in packets.
55 const size_t kDefaultInitialWindow = 10;
56 const size_t kMaxInitialWindow = 100;
58 // Don't allow a client to suggest an RTT longer than 15 seconds.
59 const uint32 kMaxInitialRoundTripTimeUs = 15 * kNumMicrosPerSecond;
61 // Maximum number of open streams per connection.
62 const size_t kDefaultMaxStreamsPerConnection = 100;
64 // Number of bytes reserved for public flags in the packet header.
65 const size_t kPublicFlagsSize = 1;
66 // Number of bytes reserved for version number in the packet header.
67 const size_t kQuicVersionSize = 4;
68 // Number of bytes reserved for private flags in the packet header.
69 const size_t kPrivateFlagsSize = 1;
70 // Number of bytes reserved for FEC group in the packet header.
71 const size_t kFecGroupSize = 1;
72 // Number of bytes reserved for the nonce proof in public reset packet.
73 const size_t kPublicResetNonceSize = 8;
75 // Signifies that the QuicPacket will contain version of the protocol.
76 const bool kIncludeVersion = true;
78 // Index of the first byte in a QUIC packet which is used in hash calculation.
79 const size_t kStartOfHashData = 0;
81 // Limit on the delta between stream IDs.
82 const QuicStreamId kMaxStreamIdDelta = 100;
83 // Limit on the delta between header IDs.
84 const QuicHeaderId kMaxHeaderIdDelta = 100;
86 // Reserved ID for the crypto stream.
87 // TODO(rch): ensure that this is not usable by any other streams.
88 const QuicStreamId kCryptoStreamId = 1;
90 // This is the default network timeout a for connection till the crypto
91 // handshake succeeds and the negotiated timeout from the handshake is received.
92 const int64 kDefaultInitialTimeoutSecs = 120; // 2 mins.
93 const int64 kDefaultTimeoutSecs = 60 * 10; // 10 minutes.
94 const int64 kDefaultMaxTimeForCryptoHandshakeSecs = 5; // 5 secs.
96 // We define an unsigned 16-bit floating point value, inspired by IEEE floats
97 // (http://en.wikipedia.org/wiki/Half_precision_floating-point_format),
98 // with 5-bit exponent (bias 1), 11-bit mantissa (effective 12 with hidden
99 // bit) and denormals, but without signs, transfinites or fractions. Wire format
100 // 16 bits (little-endian byte order) are split into exponent (high 5) and
101 // mantissa (low 11) and decoded as:
103 // if (exponent == 0) value = mantissa;
104 // else value = (mantissa | 1 << 11) << (exponent - 1)
105 const int kUFloat16ExponentBits = 5;
106 const int kUFloat16MaxExponent = (1 << kUFloat16ExponentBits) - 2; // 30
107 const int kUFloat16MantissaBits = 16 - kUFloat16ExponentBits; // 11
108 const int kUFloat16MantissaEffectiveBits = kUFloat16MantissaBits + 1; // 12
109 const uint64 kUFloat16MaxValue = // 0x3FFC0000000
110 ((GG_UINT64_C(1) << kUFloat16MantissaEffectiveBits) - 1) <<
111 kUFloat16MaxExponent;
113 enum TransmissionType {
119 enum HasRetransmittableData {
120 NO_RETRANSMITTABLE_DATA,
121 HAS_RETRANSMITTABLE_DATA,
132 CONNECTION_CLOSE_FRAME,
136 CONGESTION_FEEDBACK_FRAME,
140 enum QuicGuidLength {
141 PACKET_0BYTE_GUID = 0,
142 PACKET_1BYTE_GUID = 1,
143 PACKET_4BYTE_GUID = 4,
144 PACKET_8BYTE_GUID = 8
152 enum QuicSequenceNumberLength {
153 PACKET_1BYTE_SEQUENCE_NUMBER = 1,
154 PACKET_2BYTE_SEQUENCE_NUMBER = 2,
155 PACKET_4BYTE_SEQUENCE_NUMBER = 4,
156 PACKET_6BYTE_SEQUENCE_NUMBER = 6
159 // Used to indicate a QuicSequenceNumberLength using two flag bits.
160 enum QuicSequenceNumberLengthFlags {
161 PACKET_FLAGS_1BYTE_SEQUENCE = 0, // 00
162 PACKET_FLAGS_2BYTE_SEQUENCE = 1, // 01
163 PACKET_FLAGS_4BYTE_SEQUENCE = 1 << 1, // 10
164 PACKET_FLAGS_6BYTE_SEQUENCE = 1 << 1 | 1, // 11
167 // The public flags are specified in one byte.
168 enum QuicPacketPublicFlags {
169 PACKET_PUBLIC_FLAGS_NONE = 0,
171 // Bit 0: Does the packet header contains version info?
172 PACKET_PUBLIC_FLAGS_VERSION = 1 << 0,
174 // Bit 1: Is this packet a public reset packet?
175 PACKET_PUBLIC_FLAGS_RST = 1 << 1,
177 // Bits 2 and 3 specify the length of the GUID as follows:
182 PACKET_PUBLIC_FLAGS_0BYTE_GUID = 0,
183 PACKET_PUBLIC_FLAGS_1BYTE_GUID = 1 << 2,
184 PACKET_PUBLIC_FLAGS_4BYTE_GUID = 1 << 3,
185 PACKET_PUBLIC_FLAGS_8BYTE_GUID = 1 << 3 | 1 << 2,
187 // Bits 4 and 5 describe the packet sequence number length as follows:
192 PACKET_PUBLIC_FLAGS_1BYTE_SEQUENCE = PACKET_FLAGS_1BYTE_SEQUENCE << 4,
193 PACKET_PUBLIC_FLAGS_2BYTE_SEQUENCE = PACKET_FLAGS_2BYTE_SEQUENCE << 4,
194 PACKET_PUBLIC_FLAGS_4BYTE_SEQUENCE = PACKET_FLAGS_4BYTE_SEQUENCE << 4,
195 PACKET_PUBLIC_FLAGS_6BYTE_SEQUENCE = PACKET_FLAGS_6BYTE_SEQUENCE << 4,
197 // All bits set (bits 6 and 7 are not currently used): 00111111
198 PACKET_PUBLIC_FLAGS_MAX = (1 << 6) - 1
201 // The private flags are specified in one byte.
202 enum QuicPacketPrivateFlags {
203 PACKET_PRIVATE_FLAGS_NONE = 0,
205 // Bit 0: Does this packet contain an entropy bit?
206 PACKET_PRIVATE_FLAGS_ENTROPY = 1 << 0,
208 // Bit 1: Payload is part of an FEC group?
209 PACKET_PRIVATE_FLAGS_FEC_GROUP = 1 << 1,
211 // Bit 2: Payload is FEC as opposed to frames?
212 PACKET_PRIVATE_FLAGS_FEC = 1 << 2,
214 // All bits set (bits 3-7 are not currently used): 00000111
215 PACKET_PRIVATE_FLAGS_MAX = (1 << 3) - 1
218 // The available versions of QUIC. Guaranteed that the integer value of the enum
219 // will match the version number.
220 // When adding a new version to this enum you should add it to
221 // kSupportedQuicVersions (if appropriate), and also add a new case to the
222 // helper methods QuicVersionToQuicTag, QuicTagToQuicVersion, and
223 // QuicVersionToString.
225 // Special case to indicate unknown/unsupported QUIC version.
226 QUIC_VERSION_UNSUPPORTED = 0,
228 QUIC_VERSION_10 = 10,
229 QUIC_VERSION_11 = 11,
230 QUIC_VERSION_12 = 12, // Current version.
233 // This vector contains QUIC versions which we currently support.
234 // This should be ordered such that the highest supported version is the first
235 // element, with subsequent elements in descending order (versions can be
236 // skipped as necessary).
237 static const QuicVersion kSupportedQuicVersions[] =
240 typedef std::vector<QuicVersion> QuicVersionVector;
242 // Returns a vector of QUIC versions in kSupportedQuicVersions.
243 NET_EXPORT_PRIVATE QuicVersionVector QuicSupportedVersions();
245 // QuicTag is written to and read from the wire, but we prefer to use
246 // the more readable QuicVersion at other levels.
247 // Helper function which translates from a QuicVersion to a QuicTag. Returns 0
248 // if QuicVersion is unsupported.
249 NET_EXPORT_PRIVATE QuicTag QuicVersionToQuicTag(const QuicVersion version);
251 // Returns appropriate QuicVersion from a QuicTag.
252 // Returns QUIC_VERSION_UNSUPPORTED if version_tag cannot be understood.
253 NET_EXPORT_PRIVATE QuicVersion QuicTagToQuicVersion(const QuicTag version_tag);
255 // Helper function which translates from a QuicVersion to a string.
256 // Returns strings corresponding to enum names (e.g. QUIC_VERSION_6).
257 NET_EXPORT_PRIVATE std::string QuicVersionToString(const QuicVersion version);
259 // Returns comma separated list of string representations of QuicVersion enum
260 // values in the supplied |versions| vector.
261 NET_EXPORT_PRIVATE std::string QuicVersionVectorToString(
262 const QuicVersionVector& versions);
264 // Version and Crypto tags are written to the wire with a big-endian
265 // representation of the name of the tag. For example
266 // the client hello tag (CHLO) will be written as the
267 // following 4 bytes: 'C' 'H' 'L' 'O'. Since it is
268 // stored in memory as a little endian uint32, we need
269 // to reverse the order of the bytes.
271 // MakeQuicTag returns a value given the four bytes. For example:
272 // MakeQuicTag('C', 'H', 'L', 'O');
273 NET_EXPORT_PRIVATE QuicTag MakeQuicTag(char a, char b, char c, char d);
275 // Size in bytes of the data or fec packet header.
276 NET_EXPORT_PRIVATE size_t GetPacketHeaderSize(QuicPacketHeader header);
278 NET_EXPORT_PRIVATE size_t GetPacketHeaderSize(
279 QuicGuidLength guid_length,
280 bool include_version,
281 QuicSequenceNumberLength sequence_number_length,
282 InFecGroup is_in_fec_group);
284 // Size in bytes of the public reset packet.
285 NET_EXPORT_PRIVATE size_t GetPublicResetPacketSize();
287 // Index of the first byte in a QUIC packet of FEC protected data.
288 NET_EXPORT_PRIVATE size_t GetStartOfFecProtectedData(
289 QuicGuidLength guid_length,
290 bool include_version,
291 QuicSequenceNumberLength sequence_number_length);
292 // Index of the first byte in a QUIC packet of encrypted data.
293 NET_EXPORT_PRIVATE size_t GetStartOfEncryptedData(
294 QuicGuidLength guid_length,
295 bool include_version,
296 QuicSequenceNumberLength sequence_number_length);
298 enum QuicRstStreamErrorCode {
299 QUIC_STREAM_NO_ERROR = 0,
301 // There was some error which halted stream processing.
302 QUIC_ERROR_PROCESSING_STREAM,
303 // We got two fin or reset offsets which did not match.
304 QUIC_MULTIPLE_TERMINATION_OFFSETS,
305 // We got bad payload and can not respond to it at the protocol level.
306 QUIC_BAD_APPLICATION_PAYLOAD,
307 // Stream closed due to connection error. No reset frame is sent when this
309 QUIC_STREAM_CONNECTION_ERROR,
310 // GoAway frame sent. No more stream can be created.
311 QUIC_STREAM_PEER_GOING_AWAY,
312 // The stream has been cancelled.
313 QUIC_STREAM_CANCELLED,
315 // No error. Used as bound while iterating.
316 QUIC_STREAM_LAST_ERROR,
319 // These values must remain stable as they are uploaded to UMA histograms.
320 // To add a new error code, use the current value of QUIC_LAST_ERROR and
321 // increment QUIC_LAST_ERROR.
325 // Connection has reached an invalid state.
326 QUIC_INTERNAL_ERROR = 1,
327 // There were data frames after the a fin or reset.
328 QUIC_STREAM_DATA_AFTER_TERMINATION = 2,
329 // Control frame is malformed.
330 QUIC_INVALID_PACKET_HEADER = 3,
331 // Frame data is malformed.
332 QUIC_INVALID_FRAME_DATA = 4,
333 // The packet contained no payload.
334 QUIC_MISSING_PAYLOAD = 48,
335 // FEC data is malformed.
336 QUIC_INVALID_FEC_DATA = 5,
337 // STREAM frame data is malformed.
338 QUIC_INVALID_STREAM_DATA = 46,
339 // RST_STREAM frame data is malformed.
340 QUIC_INVALID_RST_STREAM_DATA = 6,
341 // CONNECTION_CLOSE frame data is malformed.
342 QUIC_INVALID_CONNECTION_CLOSE_DATA = 7,
343 // GOAWAY frame data is malformed.
344 QUIC_INVALID_GOAWAY_DATA = 8,
345 // ACK frame data is malformed.
346 QUIC_INVALID_ACK_DATA = 9,
347 // CONGESTION_FEEDBACK frame data is malformed.
348 QUIC_INVALID_CONGESTION_FEEDBACK_DATA = 47,
349 // Version negotiation packet is malformed.
350 QUIC_INVALID_VERSION_NEGOTIATION_PACKET = 10,
351 // Public RST packet is malformed.
352 QUIC_INVALID_PUBLIC_RST_PACKET = 11,
353 // There was an error decrypting.
354 QUIC_DECRYPTION_FAILURE = 12,
355 // There was an error encrypting.
356 QUIC_ENCRYPTION_FAILURE = 13,
357 // The packet exceeded kMaxPacketSize.
358 QUIC_PACKET_TOO_LARGE = 14,
359 // Data was sent for a stream which did not exist.
360 QUIC_PACKET_FOR_NONEXISTENT_STREAM = 15,
361 // The peer is going away. May be a client or server.
362 QUIC_PEER_GOING_AWAY = 16,
363 // A stream ID was invalid.
364 QUIC_INVALID_STREAM_ID = 17,
365 // A priority was invalid.
366 QUIC_INVALID_PRIORITY = 49,
367 // Too many streams already open.
368 QUIC_TOO_MANY_OPEN_STREAMS = 18,
369 // Received public reset for this connection.
370 QUIC_PUBLIC_RESET = 19,
371 // Invalid protocol version.
372 QUIC_INVALID_VERSION = 20,
373 // Stream reset before headers decompressed.
374 QUIC_STREAM_RST_BEFORE_HEADERS_DECOMPRESSED = 21,
375 // The Header ID for a stream was too far from the previous.
376 QUIC_INVALID_HEADER_ID = 22,
377 // Negotiable parameter received during handshake had invalid value.
378 QUIC_INVALID_NEGOTIATED_VALUE = 23,
379 // There was an error decompressing data.
380 QUIC_DECOMPRESSION_FAILURE = 24,
381 // We hit our prenegotiated (or default) timeout
382 QUIC_CONNECTION_TIMED_OUT = 25,
383 // There was an error encountered migrating addresses
384 QUIC_ERROR_MIGRATING_ADDRESS = 26,
385 // There was an error while writing to the socket.
386 QUIC_PACKET_WRITE_ERROR = 27,
387 // There was an error while reading from the socket.
388 QUIC_PACKET_READ_ERROR = 51,
389 // We received a STREAM_FRAME with no data and no fin flag set.
390 QUIC_INVALID_STREAM_FRAME = 50,
396 QUIC_HANDSHAKE_FAILED = 28,
397 // Handshake message contained out of order tags.
398 QUIC_CRYPTO_TAGS_OUT_OF_ORDER = 29,
399 // Handshake message contained too many entries.
400 QUIC_CRYPTO_TOO_MANY_ENTRIES = 30,
401 // Handshake message contained an invalid value length.
402 QUIC_CRYPTO_INVALID_VALUE_LENGTH = 31,
403 // A crypto message was received after the handshake was complete.
404 QUIC_CRYPTO_MESSAGE_AFTER_HANDSHAKE_COMPLETE = 32,
405 // A crypto message was received with an illegal message tag.
406 QUIC_INVALID_CRYPTO_MESSAGE_TYPE = 33,
407 // A crypto message was received with an illegal parameter.
408 QUIC_INVALID_CRYPTO_MESSAGE_PARAMETER = 34,
409 // An invalid channel id signature was supplied.
410 QUIC_INVALID_CHANNEL_ID_SIGNATURE = 52,
411 // A crypto message was received with a mandatory parameter missing.
412 QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND = 35,
413 // A crypto message was received with a parameter that has no overlap
414 // with the local parameter.
415 QUIC_CRYPTO_MESSAGE_PARAMETER_NO_OVERLAP = 36,
416 // A crypto message was received that contained a parameter with too few
418 QUIC_CRYPTO_MESSAGE_INDEX_NOT_FOUND = 37,
419 // An internal error occured in crypto processing.
420 QUIC_CRYPTO_INTERNAL_ERROR = 38,
421 // A crypto handshake message specified an unsupported version.
422 QUIC_CRYPTO_VERSION_NOT_SUPPORTED = 39,
423 // There was no intersection between the crypto primitives supported by the
424 // peer and ourselves.
425 QUIC_CRYPTO_NO_SUPPORT = 40,
426 // The server rejected our client hello messages too many times.
427 QUIC_CRYPTO_TOO_MANY_REJECTS = 41,
428 // The client rejected the server's certificate chain or signature.
429 QUIC_PROOF_INVALID = 42,
430 // A crypto message was received with a duplicate tag.
431 QUIC_CRYPTO_DUPLICATE_TAG = 43,
432 // A crypto message was received with the wrong encryption level (i.e. it
433 // should have been encrypted but was not.)
434 QUIC_CRYPTO_ENCRYPTION_LEVEL_INCORRECT = 44,
435 // The server config for a server has expired.
436 QUIC_CRYPTO_SERVER_CONFIG_EXPIRED = 45,
437 // We failed to setup the symmetric keys for a connection.
438 QUIC_CRYPTO_SYMMETRIC_KEY_SETUP_FAILED = 53,
440 // No error. Used as bound while iterating.
441 QUIC_LAST_ERROR = 54,
444 struct NET_EXPORT_PRIVATE QuicPacketPublicHeader {
445 QuicPacketPublicHeader();
446 explicit QuicPacketPublicHeader(const QuicPacketPublicHeader& other);
447 ~QuicPacketPublicHeader();
449 // Universal header. All QuicPacket headers will have a guid and public flags.
451 QuicGuidLength guid_length;
454 QuicSequenceNumberLength sequence_number_length;
455 QuicVersionVector versions;
458 // Header for Data or FEC packets.
459 struct NET_EXPORT_PRIVATE QuicPacketHeader {
461 explicit QuicPacketHeader(const QuicPacketPublicHeader& header);
463 NET_EXPORT_PRIVATE friend std::ostream& operator<<(
464 std::ostream& os, const QuicPacketHeader& s);
466 QuicPacketPublicHeader public_header;
469 QuicPacketEntropyHash entropy_hash;
470 QuicPacketSequenceNumber packet_sequence_number;
471 InFecGroup is_in_fec_group;
472 QuicFecGroupNumber fec_group;
475 struct NET_EXPORT_PRIVATE QuicPublicResetPacket {
476 QuicPublicResetPacket() {}
477 explicit QuicPublicResetPacket(const QuicPacketPublicHeader& header)
478 : public_header(header) {}
479 QuicPacketPublicHeader public_header;
480 QuicPacketSequenceNumber rejected_sequence_number;
481 QuicPublicResetNonceProof nonce_proof;
484 enum QuicVersionNegotiationState {
485 START_NEGOTIATION = 0,
486 // Server-side this implies we've sent a version negotiation packet and are
487 // waiting on the client to select a compatible version. Client-side this
488 // implies we've gotten a version negotiation packet, are retransmitting the
489 // initial packets with a supported version and are waiting for our first
490 // packet from the server.
491 NEGOTIATION_IN_PROGRESS,
492 // This indicates this endpoint has received a packet from the peer with a
493 // version this endpoint supports. Version negotiation is complete, and the
494 // version number will no longer be sent with future packets.
498 typedef QuicPacketPublicHeader QuicVersionNegotiationPacket;
500 // A padding frame contains no payload.
501 struct NET_EXPORT_PRIVATE QuicPaddingFrame {
504 struct NET_EXPORT_PRIVATE QuicStreamFrame {
506 QuicStreamFrame(QuicStreamId stream_id,
508 QuicStreamOffset offset,
509 base::StringPiece data);
511 QuicStreamId stream_id;
513 QuicStreamOffset offset; // Location of this data in the stream.
514 base::StringPiece data;
516 // If this is set, then when this packet is ACKed the AckNotifier will be
518 QuicAckNotifier* notifier;
521 // TODO(ianswett): Re-evaluate the trade-offs of hash_set vs set when framing
523 typedef std::set<QuicPacketSequenceNumber> SequenceNumberSet;
524 // TODO(pwestin): Add a way to enforce the max size of this map.
525 typedef std::map<QuicPacketSequenceNumber, QuicTime> TimeMap;
527 struct NET_EXPORT_PRIVATE ReceivedPacketInfo {
528 ReceivedPacketInfo();
529 ~ReceivedPacketInfo();
530 NET_EXPORT_PRIVATE friend std::ostream& operator<<(
531 std::ostream& os, const ReceivedPacketInfo& s);
533 // Entropy hash of all packets up to largest observed not including missing
535 QuicPacketEntropyHash entropy_hash;
537 // The highest packet sequence number we've observed from the peer.
539 // In general, this should be the largest packet number we've received. In
540 // the case of truncated acks, we may have to advertise a lower "upper bound"
541 // than largest received, to avoid implicitly acking missing packets that
542 // don't fit in the missing packet list due to size limitations. In this
543 // case, largest_observed may be a packet which is also in the missing packets
545 QuicPacketSequenceNumber largest_observed;
547 // Time elapsed since largest_observed was received until this Ack frame was
549 QuicTime::Delta delta_time_largest_observed;
551 // TODO(satyamshekhar): Can be optimized using an interval set like data
553 // The set of packets which we're expecting and have not received.
554 SequenceNumberSet missing_packets;
556 // Whether the ack had to be truncated when sent.
560 // True if the sequence number is greater than largest_observed or is listed
562 // Always returns false for sequence numbers less than least_unacked.
563 bool NET_EXPORT_PRIVATE IsAwaitingPacket(
564 const ReceivedPacketInfo& received_info,
565 QuicPacketSequenceNumber sequence_number);
567 // Inserts missing packets between [lower, higher).
568 void NET_EXPORT_PRIVATE InsertMissingPacketsBetween(
569 ReceivedPacketInfo* received_info,
570 QuicPacketSequenceNumber lower,
571 QuicPacketSequenceNumber higher);
573 struct NET_EXPORT_PRIVATE SentPacketInfo {
576 NET_EXPORT_PRIVATE friend std::ostream& operator<<(
577 std::ostream& os, const SentPacketInfo& s);
579 // Entropy hash of all packets up to, but not including, the least unacked
581 QuicPacketEntropyHash entropy_hash;
582 // The lowest packet we've sent which is unacked, and we expect an ack for.
583 QuicPacketSequenceNumber least_unacked;
586 struct NET_EXPORT_PRIVATE QuicAckFrame {
588 // Testing convenience method to construct a QuicAckFrame with all packets
589 // from least_unacked to largest_observed acked.
590 QuicAckFrame(QuicPacketSequenceNumber largest_observed,
591 QuicTime largest_observed_receive_time,
592 QuicPacketSequenceNumber least_unacked);
594 NET_EXPORT_PRIVATE friend std::ostream& operator<<(
595 std::ostream& os, const QuicAckFrame& s);
597 SentPacketInfo sent_info;
598 ReceivedPacketInfo received_info;
601 // Defines for all types of congestion feedback that will be negotiated in QUIC,
602 // kTCP MUST be supported by all QUIC implementations to guarantee 100%
604 enum CongestionFeedbackType {
605 kTCP, // Used to mimic TCP.
606 kInterArrival, // Use additional inter arrival information.
607 kFixRate, // Provided for testing.
610 struct NET_EXPORT_PRIVATE CongestionFeedbackMessageTCP {
611 uint16 accumulated_number_of_lost_packets;
612 QuicByteCount receive_window;
615 struct NET_EXPORT_PRIVATE CongestionFeedbackMessageInterArrival {
616 CongestionFeedbackMessageInterArrival();
617 ~CongestionFeedbackMessageInterArrival();
618 uint16 accumulated_number_of_lost_packets;
619 // The set of received packets since the last feedback was sent, along with
620 // their arrival times.
621 TimeMap received_packet_times;
624 struct NET_EXPORT_PRIVATE CongestionFeedbackMessageFixRate {
625 CongestionFeedbackMessageFixRate();
626 QuicBandwidth bitrate;
629 struct NET_EXPORT_PRIVATE QuicCongestionFeedbackFrame {
630 QuicCongestionFeedbackFrame();
631 ~QuicCongestionFeedbackFrame();
633 NET_EXPORT_PRIVATE friend std::ostream& operator<<(
634 std::ostream& os, const QuicCongestionFeedbackFrame& c);
636 CongestionFeedbackType type;
637 // This should really be a union, but since the inter arrival struct
638 // is non-trivial, C++ prohibits it.
639 CongestionFeedbackMessageTCP tcp;
640 CongestionFeedbackMessageInterArrival inter_arrival;
641 CongestionFeedbackMessageFixRate fix_rate;
644 struct NET_EXPORT_PRIVATE QuicRstStreamFrame {
645 QuicRstStreamFrame() {}
646 QuicRstStreamFrame(QuicStreamId stream_id, QuicRstStreamErrorCode error_code)
647 : stream_id(stream_id), error_code(error_code) {
648 DCHECK_LE(error_code, std::numeric_limits<uint8>::max());
651 QuicStreamId stream_id;
652 QuicRstStreamErrorCode error_code;
653 std::string error_details;
656 struct NET_EXPORT_PRIVATE QuicConnectionCloseFrame {
657 QuicErrorCode error_code;
658 std::string error_details;
659 // TODO(ianswett): Remove this once QUIC_VERSION_11 is removed.
660 QuicAckFrame ack_frame;
663 struct NET_EXPORT_PRIVATE QuicGoAwayFrame {
665 QuicGoAwayFrame(QuicErrorCode error_code,
666 QuicStreamId last_good_stream_id,
667 const std::string& reason);
669 QuicErrorCode error_code;
670 QuicStreamId last_good_stream_id;
671 std::string reason_phrase;
674 // EncryptionLevel enumerates the stages of encryption that a QUIC connection
675 // progresses through. When retransmitting a packet, the encryption level needs
676 // to be specified so that it is retransmitted at a level which the peer can
678 enum EncryptionLevel {
680 ENCRYPTION_INITIAL = 1,
681 ENCRYPTION_FORWARD_SECURE = 2,
683 NUM_ENCRYPTION_LEVELS,
686 struct NET_EXPORT_PRIVATE QuicFrame {
688 explicit QuicFrame(QuicPaddingFrame* padding_frame)
689 : type(PADDING_FRAME),
690 padding_frame(padding_frame) {
692 explicit QuicFrame(QuicStreamFrame* stream_frame)
693 : type(STREAM_FRAME),
694 stream_frame(stream_frame) {
696 explicit QuicFrame(QuicAckFrame* frame)
700 explicit QuicFrame(QuicCongestionFeedbackFrame* frame)
701 : type(CONGESTION_FEEDBACK_FRAME),
702 congestion_feedback_frame(frame) {
704 explicit QuicFrame(QuicRstStreamFrame* frame)
705 : type(RST_STREAM_FRAME),
706 rst_stream_frame(frame) {
708 explicit QuicFrame(QuicConnectionCloseFrame* frame)
709 : type(CONNECTION_CLOSE_FRAME),
710 connection_close_frame(frame) {
712 explicit QuicFrame(QuicGoAwayFrame* frame)
713 : type(GOAWAY_FRAME),
714 goaway_frame(frame) {
719 QuicPaddingFrame* padding_frame;
720 QuicStreamFrame* stream_frame;
721 QuicAckFrame* ack_frame;
722 QuicCongestionFeedbackFrame* congestion_feedback_frame;
723 QuicRstStreamFrame* rst_stream_frame;
724 QuicConnectionCloseFrame* connection_close_frame;
725 QuicGoAwayFrame* goaway_frame;
729 typedef std::vector<QuicFrame> QuicFrames;
731 struct NET_EXPORT_PRIVATE QuicFecData {
734 // The FEC group number is also the sequence number of the first
735 // FEC protected packet. The last protected packet's sequence number will
736 // be one less than the sequence number of the FEC packet.
737 QuicFecGroupNumber fec_group;
738 base::StringPiece redundancy;
741 class NET_EXPORT_PRIVATE QuicData {
743 QuicData(const char* buffer, size_t length)
746 owns_buffer_(false) {}
748 QuicData(char* buffer, size_t length, bool owns_buffer)
751 owns_buffer_(owns_buffer) {}
755 base::StringPiece AsStringPiece() const {
756 return base::StringPiece(data(), length());
759 const char* data() const { return buffer_; }
760 size_t length() const { return length_; }
767 DISALLOW_COPY_AND_ASSIGN(QuicData);
770 class NET_EXPORT_PRIVATE QuicPacket : public QuicData {
772 static QuicPacket* NewDataPacket(
776 QuicGuidLength guid_length,
777 bool includes_version,
778 QuicSequenceNumberLength sequence_number_length) {
779 return new QuicPacket(buffer, length, owns_buffer, guid_length,
780 includes_version, sequence_number_length, false);
783 static QuicPacket* NewFecPacket(
787 QuicGuidLength guid_length,
788 bool includes_version,
789 QuicSequenceNumberLength sequence_number_length) {
790 return new QuicPacket(buffer, length, owns_buffer, guid_length,
791 includes_version, sequence_number_length, true);
794 base::StringPiece FecProtectedData() const;
795 base::StringPiece AssociatedData() const;
796 base::StringPiece BeforePlaintext() const;
797 base::StringPiece Plaintext() const;
799 bool is_fec_packet() const { return is_fec_packet_; }
801 char* mutable_data() { return buffer_; }
804 QuicPacket(char* buffer,
807 QuicGuidLength guid_length,
808 bool includes_version,
809 QuicSequenceNumberLength sequence_number_length,
811 : QuicData(buffer, length, owns_buffer),
813 is_fec_packet_(is_fec_packet),
814 guid_length_(guid_length),
815 includes_version_(includes_version),
816 sequence_number_length_(sequence_number_length) {}
819 const bool is_fec_packet_;
820 const QuicGuidLength guid_length_;
821 const bool includes_version_;
822 const QuicSequenceNumberLength sequence_number_length_;
824 DISALLOW_COPY_AND_ASSIGN(QuicPacket);
827 class NET_EXPORT_PRIVATE QuicEncryptedPacket : public QuicData {
829 QuicEncryptedPacket(const char* buffer, size_t length)
830 : QuicData(buffer, length) {}
832 QuicEncryptedPacket(char* buffer, size_t length, bool owns_buffer)
833 : QuicData(buffer, length, owns_buffer) {}
835 // By default, gtest prints the raw bytes of an object. The bool data
836 // member (in the base class QuicData) causes this object to have padding
837 // bytes, which causes the default gtest object printer to read
838 // uninitialize memory. So we need to teach gtest how to print this object.
839 NET_EXPORT_PRIVATE friend std::ostream& operator<<(
840 std::ostream& os, const QuicEncryptedPacket& s);
843 DISALLOW_COPY_AND_ASSIGN(QuicEncryptedPacket);
846 class NET_EXPORT_PRIVATE RetransmittableFrames {
848 RetransmittableFrames();
849 ~RetransmittableFrames();
851 // Allocates a local copy of the referenced StringPiece has QuicStreamFrame
853 // Takes ownership of |stream_frame|.
854 const QuicFrame& AddStreamFrame(QuicStreamFrame* stream_frame);
855 // Takes ownership of the frame inside |frame|.
856 const QuicFrame& AddNonStreamFrame(const QuicFrame& frame);
857 const QuicFrames& frames() const { return frames_; }
859 void set_encryption_level(EncryptionLevel level);
860 EncryptionLevel encryption_level() const {
861 return encryption_level_;
866 EncryptionLevel encryption_level_;
867 // Data referenced by the StringPiece of a QuicStreamFrame.
868 std::vector<std::string*> stream_data_;
870 DISALLOW_COPY_AND_ASSIGN(RetransmittableFrames);
873 struct NET_EXPORT_PRIVATE SerializedPacket {
874 SerializedPacket(QuicPacketSequenceNumber sequence_number,
875 QuicSequenceNumberLength sequence_number_length,
877 QuicPacketEntropyHash entropy_hash,
878 RetransmittableFrames* retransmittable_frames);
881 QuicPacketSequenceNumber sequence_number;
882 QuicSequenceNumberLength sequence_number_length;
884 QuicPacketEntropyHash entropy_hash;
885 RetransmittableFrames* retransmittable_frames;
887 // If set, these will be called when this packet is ACKed by the peer.
888 std::set<QuicAckNotifier*> notifiers;
891 // A struct for functions which consume data payloads and fins.
892 struct QuicConsumedData {
893 QuicConsumedData(size_t bytes_consumed, bool fin_consumed)
894 : bytes_consumed(bytes_consumed),
895 fin_consumed(fin_consumed) {}
896 // By default, gtest prints the raw bytes of an object. The bool data
897 // member causes this object to have padding bytes, which causes the
898 // default gtest object printer to read uninitialize memory. So we need
899 // to teach gtest how to print this object.
900 NET_EXPORT_PRIVATE friend std::ostream& operator<<(
901 std::ostream& os, const QuicConsumedData& s);
903 // How many bytes were consumed.
904 size_t bytes_consumed;
906 // True if an incoming fin was consumed.
912 WRITE_STATUS_BLOCKED,
916 // A struct used to return the result of write calls including either the number
917 // of bytes written or the error code, depending upon the status.
918 struct NET_EXPORT_PRIVATE WriteResult {
919 WriteResult(WriteStatus status, int bytes_written_or_error_code) :
920 status(status), bytes_written(bytes_written_or_error_code) {
925 int bytes_written; // only valid when status is OK
926 int error_code; // only valid when status is ERROR
932 #endif // NET_QUIC_QUIC_PROTOCOL_H_