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| 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 #ifndef NET_QUIC_QUIC_FRAMER_H_ | |
| 6 #define NET_QUIC_QUIC_FRAMER_H_ | |
| 7 | |
| 8 #include <vector> | |
| 9 | |
| 10 #include "base/basictypes.h" | |
| 11 #include "base/logging.h" | |
| 12 #include "base/memory/scoped_ptr.h" | |
| 13 #include "base/strings/string_piece.h" | |
| 14 #include "net/base/net_export.h" | |
| 15 #include "net/quic/quic_protocol.h" | |
| 16 | |
| 17 namespace net { | |
| 18 | |
| 19 namespace test { | |
| 20 class QuicFramerPeer; | |
| 21 } // namespace test | |
| 22 | |
| 23 class QuicDataReader; | |
| 24 class QuicDataWriter; | |
| 25 class QuicDecrypter; | |
| 26 class QuicEncrypter; | |
| 27 class QuicFramer; | |
| 28 | |
| 29 // Number of bytes reserved for the frame type preceding each frame. | |
| 30 const size_t kQuicFrameTypeSize = 1; | |
| 31 // Number of bytes reserved for error code. | |
| 32 const size_t kQuicErrorCodeSize = 4; | |
| 33 // Number of bytes reserved to denote the length of error details field. | |
| 34 const size_t kQuicErrorDetailsLengthSize = 2; | |
| 35 | |
| 36 // Maximum number of bytes reserved for stream id. | |
| 37 const size_t kQuicMaxStreamIdSize = 4; | |
| 38 // Maximum number of bytes reserved for byte offset in stream frame. | |
| 39 const size_t kQuicMaxStreamOffsetSize = 8; | |
| 40 // Number of bytes reserved to store payload length in stream frame. | |
| 41 const size_t kQuicStreamPayloadLengthSize = 2; | |
| 42 | |
| 43 // Size in bytes of the entropy hash sent in ack frames. | |
| 44 const size_t kQuicEntropyHashSize = 1; | |
| 45 // Size in bytes reserved for the delta time of the largest observed | |
| 46 // sequence number in ack frames. | |
| 47 const size_t kQuicDeltaTimeLargestObservedSize = 2; | |
| 48 // Size in bytes reserved for the number of received packets with timestamps. | |
| 49 const size_t kQuicNumTimestampsSize = 1; | |
| 50 // Size in bytes reserved for the number of missing packets in ack frames. | |
| 51 const size_t kNumberOfNackRangesSize = 1; | |
| 52 // Maximum number of missing packet ranges that can fit within an ack frame. | |
| 53 const size_t kMaxNackRanges = | |
| 54 (1 << (kNumberOfNackRangesSize * 8)) - 1; | |
| 55 // Size in bytes reserved for the number of revived packets in ack frames. | |
| 56 const size_t kNumberOfRevivedPacketsSize = 1; | |
| 57 // Maximum number of revived packets that can fit within an ack frame. | |
| 58 const size_t kMaxRevivedPackets = | |
| 59 (1 << (kNumberOfRevivedPacketsSize * 8)) - 1; | |
| 60 | |
| 61 // This class receives callbacks from the framer when packets | |
| 62 // are processed. | |
| 63 class NET_EXPORT_PRIVATE QuicFramerVisitorInterface { | |
| 64 public: | |
| 65 virtual ~QuicFramerVisitorInterface() {} | |
| 66 | |
| 67 // Called if an error is detected in the QUIC protocol. | |
| 68 virtual void OnError(QuicFramer* framer) = 0; | |
| 69 | |
| 70 // Called only when |is_server_| is true and the the framer gets a packet with | |
| 71 // version flag true and the version on the packet doesn't match | |
| 72 // |quic_version_|. The visitor should return true after it updates the | |
| 73 // version of the |framer_| to |received_version| or false to stop processing | |
| 74 // this packet. | |
| 75 virtual bool OnProtocolVersionMismatch(QuicVersion received_version) = 0; | |
| 76 | |
| 77 // Called when a new packet has been received, before it | |
| 78 // has been validated or processed. | |
| 79 virtual void OnPacket() = 0; | |
| 80 | |
| 81 // Called when a public reset packet has been parsed but has not yet | |
| 82 // been validated. | |
| 83 virtual void OnPublicResetPacket( | |
| 84 const QuicPublicResetPacket& packet) = 0; | |
| 85 | |
| 86 // Called only when |is_server_| is false and a version negotiation packet has | |
| 87 // been parsed. | |
| 88 virtual void OnVersionNegotiationPacket( | |
| 89 const QuicVersionNegotiationPacket& packet) = 0; | |
| 90 | |
| 91 // Called when a lost packet has been recovered via FEC, | |
| 92 // before it has been processed. | |
| 93 virtual void OnRevivedPacket() = 0; | |
| 94 | |
| 95 // Called when the public header has been parsed, but has not been | |
| 96 // authenticated. If it returns false, framing for this packet will cease. | |
| 97 virtual bool OnUnauthenticatedPublicHeader( | |
| 98 const QuicPacketPublicHeader& header) = 0; | |
| 99 | |
| 100 // Called when the unauthenticated portion of the header has been parsed. | |
| 101 // If OnUnauthenticatedHeader returns false, framing for this packet will | |
| 102 // cease. | |
| 103 virtual bool OnUnauthenticatedHeader(const QuicPacketHeader& header) = 0; | |
| 104 | |
| 105 // Called when a packet has been decrypted. |level| is the encryption level | |
| 106 // of the packet. | |
| 107 virtual void OnDecryptedPacket(EncryptionLevel level) = 0; | |
| 108 | |
| 109 // Called when the complete header of a packet had been parsed. | |
| 110 // If OnPacketHeader returns false, framing for this packet will cease. | |
| 111 virtual bool OnPacketHeader(const QuicPacketHeader& header) = 0; | |
| 112 | |
| 113 // Called when a data packet is parsed that is part of an FEC group. | |
| 114 // |payload| is the non-encrypted FEC protected payload of the packet. | |
| 115 virtual void OnFecProtectedPayload(base::StringPiece payload) = 0; | |
| 116 | |
| 117 // Called when a StreamFrame has been parsed. | |
| 118 virtual bool OnStreamFrame(const QuicStreamFrame& frame) = 0; | |
| 119 | |
| 120 // Called when a AckFrame has been parsed. If OnAckFrame returns false, | |
| 121 // the framer will stop parsing the current packet. | |
| 122 virtual bool OnAckFrame(const QuicAckFrame& frame) = 0; | |
| 123 | |
| 124 // Called when a StopWaitingFrame has been parsed. | |
| 125 virtual bool OnStopWaitingFrame(const QuicStopWaitingFrame& frame) = 0; | |
| 126 | |
| 127 // Called when a PingFrame has been parsed. | |
| 128 virtual bool OnPingFrame(const QuicPingFrame& frame) = 0; | |
| 129 | |
| 130 // Called when a RstStreamFrame has been parsed. | |
| 131 virtual bool OnRstStreamFrame(const QuicRstStreamFrame& frame) = 0; | |
| 132 | |
| 133 // Called when a ConnectionCloseFrame has been parsed. | |
| 134 virtual bool OnConnectionCloseFrame( | |
| 135 const QuicConnectionCloseFrame& frame) = 0; | |
| 136 | |
| 137 // Called when a GoAwayFrame has been parsed. | |
| 138 virtual bool OnGoAwayFrame(const QuicGoAwayFrame& frame) = 0; | |
| 139 | |
| 140 // Called when a WindowUpdateFrame has been parsed. | |
| 141 virtual bool OnWindowUpdateFrame(const QuicWindowUpdateFrame& frame) = 0; | |
| 142 | |
| 143 // Called when a BlockedFrame has been parsed. | |
| 144 virtual bool OnBlockedFrame(const QuicBlockedFrame& frame) = 0; | |
| 145 | |
| 146 // Called when FEC data has been parsed. | |
| 147 virtual void OnFecData(const QuicFecData& fec) = 0; | |
| 148 | |
| 149 // Called when a packet has been completely processed. | |
| 150 virtual void OnPacketComplete() = 0; | |
| 151 }; | |
| 152 | |
| 153 class NET_EXPORT_PRIVATE QuicFecBuilderInterface { | |
| 154 public: | |
| 155 virtual ~QuicFecBuilderInterface() {} | |
| 156 | |
| 157 // Called when a data packet is constructed that is part of an FEC group. | |
| 158 // |payload| is the non-encrypted FEC protected payload of the packet. | |
| 159 virtual void OnBuiltFecProtectedPayload(const QuicPacketHeader& header, | |
| 160 base::StringPiece payload) = 0; | |
| 161 }; | |
| 162 | |
| 163 // This class calculates the received entropy of the ack packet being | |
| 164 // framed, should it get truncated. | |
| 165 class NET_EXPORT_PRIVATE QuicReceivedEntropyHashCalculatorInterface { | |
| 166 public: | |
| 167 virtual ~QuicReceivedEntropyHashCalculatorInterface() {} | |
| 168 | |
| 169 // When an ack frame gets truncated while being framed the received | |
| 170 // entropy of the ack frame needs to be calculated since the some of the | |
| 171 // missing packets are not added and the largest observed might be lowered. | |
| 172 // This should return the received entropy hash of the packets received up to | |
| 173 // and including |sequence_number|. | |
| 174 virtual QuicPacketEntropyHash EntropyHash( | |
| 175 QuicPacketSequenceNumber sequence_number) const = 0; | |
| 176 }; | |
| 177 | |
| 178 // Class for parsing and constructing QUIC packets. It has a | |
| 179 // QuicFramerVisitorInterface that is called when packets are parsed. | |
| 180 // It also has a QuicFecBuilder that is called when packets are constructed | |
| 181 // in order to generate FEC data for subsequently building FEC packets. | |
| 182 class NET_EXPORT_PRIVATE QuicFramer { | |
| 183 public: | |
| 184 // Constructs a new framer that installs a kNULL QuicEncrypter and | |
| 185 // QuicDecrypter for level ENCRYPTION_NONE. |supported_versions| specifies the | |
| 186 // list of supported QUIC versions. |quic_version_| is set to the maximum | |
| 187 // version in |supported_versions|. | |
| 188 QuicFramer(const QuicVersionVector& supported_versions, | |
| 189 QuicTime creation_time, | |
| 190 bool is_server); | |
| 191 | |
| 192 virtual ~QuicFramer(); | |
| 193 | |
| 194 // Returns true if |version| is a supported protocol version. | |
| 195 bool IsSupportedVersion(const QuicVersion version) const; | |
| 196 | |
| 197 // Set callbacks to be called from the framer. A visitor must be set, or | |
| 198 // else the framer will likely crash. It is acceptable for the visitor | |
| 199 // to do nothing. If this is called multiple times, only the last visitor | |
| 200 // will be used. | |
| 201 void set_visitor(QuicFramerVisitorInterface* visitor) { | |
| 202 visitor_ = visitor; | |
| 203 } | |
| 204 | |
| 205 // Set a builder to be called from the framer when building FEC protected | |
| 206 // packets. If this is called multiple times, only the last builder | |
| 207 // will be used. The builder need not be set. | |
| 208 void set_fec_builder(QuicFecBuilderInterface* builder) { | |
| 209 fec_builder_ = builder; | |
| 210 } | |
| 211 | |
| 212 const QuicVersionVector& supported_versions() const { | |
| 213 return supported_versions_; | |
| 214 } | |
| 215 | |
| 216 QuicVersion version() const { | |
| 217 return quic_version_; | |
| 218 } | |
| 219 | |
| 220 void set_version(const QuicVersion version); | |
| 221 | |
| 222 // Does not DCHECK for supported version. Used by tests to set unsupported | |
| 223 // version to trigger version negotiation. | |
| 224 void set_version_for_tests(const QuicVersion version) { | |
| 225 quic_version_ = version; | |
| 226 } | |
| 227 | |
| 228 // Set entropy calculator to be called from the framer when it needs the | |
| 229 // entropy of a truncated ack frame. An entropy calculator must be set or else | |
| 230 // the framer will likely crash. If this is called multiple times, only the | |
| 231 // last calculator will be used. | |
| 232 void set_received_entropy_calculator( | |
| 233 QuicReceivedEntropyHashCalculatorInterface* entropy_calculator) { | |
| 234 entropy_calculator_ = entropy_calculator; | |
| 235 } | |
| 236 | |
| 237 QuicErrorCode error() const { | |
| 238 return error_; | |
| 239 } | |
| 240 | |
| 241 // Pass a UDP packet into the framer for parsing. | |
| 242 // Return true if the packet was processed succesfully. |packet| must be a | |
| 243 // single, complete UDP packet (not a frame of a packet). This packet | |
| 244 // might be null padded past the end of the payload, which will be correctly | |
| 245 // ignored. | |
| 246 bool ProcessPacket(const QuicEncryptedPacket& packet); | |
| 247 | |
| 248 // Pass a data packet that was revived from FEC data into the framer | |
| 249 // for parsing. | |
| 250 // Return true if the packet was processed succesfully. |payload| must be | |
| 251 // the complete DECRYPTED payload of the revived packet. | |
| 252 bool ProcessRevivedPacket(QuicPacketHeader* header, | |
| 253 base::StringPiece payload); | |
| 254 | |
| 255 // Largest size in bytes of all stream frame fields without the payload. | |
| 256 static size_t GetMinStreamFrameSize(QuicStreamId stream_id, | |
| 257 QuicStreamOffset offset, | |
| 258 bool last_frame_in_packet, | |
| 259 InFecGroup is_in_fec_group); | |
| 260 // Size in bytes of all ack frame fields without the missing packets. | |
| 261 static size_t GetMinAckFrameSize( | |
| 262 QuicSequenceNumberLength sequence_number_length, | |
| 263 QuicSequenceNumberLength largest_observed_length); | |
| 264 // Size in bytes of a stop waiting frame. | |
| 265 static size_t GetStopWaitingFrameSize( | |
| 266 QuicSequenceNumberLength sequence_number_length); | |
| 267 // Size in bytes of all reset stream frame without the error details. | |
| 268 static size_t GetMinRstStreamFrameSize(); | |
| 269 // Size in bytes of all connection close frame fields without the error | |
| 270 // details and the missing packets from the enclosed ack frame. | |
| 271 static size_t GetMinConnectionCloseFrameSize(); | |
| 272 // Size in bytes of all GoAway frame fields without the reason phrase. | |
| 273 static size_t GetMinGoAwayFrameSize(); | |
| 274 // Size in bytes of all WindowUpdate frame fields. | |
| 275 static size_t GetWindowUpdateFrameSize(); | |
| 276 // Size in bytes of all Blocked frame fields. | |
| 277 static size_t GetBlockedFrameSize(); | |
| 278 // Size in bytes required to serialize the stream id. | |
| 279 static size_t GetStreamIdSize(QuicStreamId stream_id); | |
| 280 // Size in bytes required to serialize the stream offset. | |
| 281 static size_t GetStreamOffsetSize(QuicStreamOffset offset); | |
| 282 // Size in bytes required for a serialized version negotiation packet | |
| 283 static size_t GetVersionNegotiationPacketSize(size_t number_versions); | |
| 284 | |
| 285 // Returns the number of bytes added to the packet for the specified frame, | |
| 286 // and 0 if the frame doesn't fit. Includes the header size for the first | |
| 287 // frame. | |
| 288 size_t GetSerializedFrameLength( | |
| 289 const QuicFrame& frame, | |
| 290 size_t free_bytes, | |
| 291 bool first_frame_in_packet, | |
| 292 bool last_frame_in_packet, | |
| 293 InFecGroup is_in_fec_group, | |
| 294 QuicSequenceNumberLength sequence_number_length); | |
| 295 | |
| 296 // Returns the associated data from the encrypted packet |encrypted| as a | |
| 297 // stringpiece. | |
| 298 static base::StringPiece GetAssociatedDataFromEncryptedPacket( | |
| 299 const QuicEncryptedPacket& encrypted, | |
| 300 QuicConnectionIdLength connection_id_length, | |
| 301 bool includes_version, | |
| 302 QuicSequenceNumberLength sequence_number_length); | |
| 303 | |
| 304 // Returns a QuicPacket* that is owned by the caller, is created from | |
| 305 // |frames|. Returns nullptr if the packet could not be created. | |
| 306 // The packet must be of size |packet_size|. | |
| 307 QuicPacket* BuildDataPacket(const QuicPacketHeader& header, | |
| 308 const QuicFrames& frames, | |
| 309 char* buffer, | |
| 310 size_t packet_length); | |
| 311 | |
| 312 // Returns a QuicPacket* that is owned by the caller, and is populated with | |
| 313 // the fields in |header| and |fec|. Returns nullptr if the packet could | |
| 314 // not be created. | |
| 315 QuicPacket* BuildFecPacket(const QuicPacketHeader& header, | |
| 316 const QuicFecData& fec); | |
| 317 | |
| 318 // Returns a new public reset packet, owned by the caller. | |
| 319 static QuicEncryptedPacket* BuildPublicResetPacket( | |
| 320 const QuicPublicResetPacket& packet); | |
| 321 | |
| 322 QuicEncryptedPacket* BuildVersionNegotiationPacket( | |
| 323 const QuicPacketPublicHeader& header, | |
| 324 const QuicVersionVector& supported_versions); | |
| 325 | |
| 326 // SetDecrypter sets the primary decrypter, replacing any that already exists, | |
| 327 // and takes ownership. If an alternative decrypter is in place then the | |
| 328 // function DCHECKs. This is intended for cases where one knows that future | |
| 329 // packets will be using the new decrypter and the previous decrypter is now | |
| 330 // obsolete. |level| indicates the encryption level of the new decrypter. | |
| 331 void SetDecrypter(QuicDecrypter* decrypter, EncryptionLevel level); | |
| 332 | |
| 333 // SetAlternativeDecrypter sets a decrypter that may be used to decrypt | |
| 334 // future packets and takes ownership of it. |level| indicates the encryption | |
| 335 // level of the decrypter. If |latch_once_used| is true, then the first time | |
| 336 // that the decrypter is successful it will replace the primary decrypter. | |
| 337 // Otherwise both decrypters will remain active and the primary decrypter | |
| 338 // will be the one last used. | |
| 339 void SetAlternativeDecrypter(QuicDecrypter* decrypter, | |
| 340 EncryptionLevel level, | |
| 341 bool latch_once_used); | |
| 342 | |
| 343 const QuicDecrypter* decrypter() const; | |
| 344 const QuicDecrypter* alternative_decrypter() const; | |
| 345 | |
| 346 // Changes the encrypter used for level |level| to |encrypter|. The function | |
| 347 // takes ownership of |encrypter|. | |
| 348 void SetEncrypter(EncryptionLevel level, QuicEncrypter* encrypter); | |
| 349 const QuicEncrypter* encrypter(EncryptionLevel level) const; | |
| 350 | |
| 351 // Returns a new encrypted packet, owned by the caller. | |
| 352 QuicEncryptedPacket* EncryptPacket(EncryptionLevel level, | |
| 353 QuicPacketSequenceNumber sequence_number, | |
| 354 const QuicPacket& packet); | |
| 355 | |
| 356 // Returns the maximum length of plaintext that can be encrypted | |
| 357 // to ciphertext no larger than |ciphertext_size|. | |
| 358 size_t GetMaxPlaintextSize(size_t ciphertext_size); | |
| 359 | |
| 360 const std::string& detailed_error() { return detailed_error_; } | |
| 361 | |
| 362 // The minimum sequence number length required to represent |sequence_number|. | |
| 363 static QuicSequenceNumberLength GetMinSequenceNumberLength( | |
| 364 QuicPacketSequenceNumber sequence_number); | |
| 365 | |
| 366 void SetSupportedVersions(const QuicVersionVector& versions) { | |
| 367 supported_versions_ = versions; | |
| 368 quic_version_ = versions[0]; | |
| 369 } | |
| 370 | |
| 371 void set_validate_flags(bool value) { validate_flags_ = value; } | |
| 372 | |
| 373 bool is_server() const { return is_server_; } | |
| 374 | |
| 375 static QuicPacketEntropyHash GetPacketEntropyHash( | |
| 376 const QuicPacketHeader& header); | |
| 377 | |
| 378 private: | |
| 379 friend class test::QuicFramerPeer; | |
| 380 | |
| 381 typedef std::map<QuicPacketSequenceNumber, uint8> NackRangeMap; | |
| 382 | |
| 383 struct AckFrameInfo { | |
| 384 AckFrameInfo(); | |
| 385 ~AckFrameInfo(); | |
| 386 | |
| 387 // The maximum delta between ranges. | |
| 388 QuicPacketSequenceNumber max_delta; | |
| 389 // Nack ranges starting with start sequence numbers and lengths. | |
| 390 NackRangeMap nack_ranges; | |
| 391 }; | |
| 392 | |
| 393 bool ProcessDataPacket(const QuicPacketPublicHeader& public_header, | |
| 394 const QuicEncryptedPacket& packet, | |
| 395 char* decrypted_buffer, | |
| 396 size_t buffer_length); | |
| 397 | |
| 398 bool ProcessPublicResetPacket(const QuicPacketPublicHeader& public_header); | |
| 399 | |
| 400 bool ProcessVersionNegotiationPacket(QuicPacketPublicHeader* public_header); | |
| 401 | |
| 402 bool ProcessPublicHeader(QuicPacketPublicHeader* header); | |
| 403 | |
| 404 // |decrypted_buffer| must be allocated to be large enough to hold the | |
| 405 // unencrypted contents of |packet|. | |
| 406 bool ProcessPacketHeader(QuicPacketHeader* header, | |
| 407 const QuicEncryptedPacket& packet, | |
| 408 char* decrypted_buffer, | |
| 409 size_t buffer_length); | |
| 410 | |
| 411 bool ProcessPacketSequenceNumber( | |
| 412 QuicSequenceNumberLength sequence_number_length, | |
| 413 QuicPacketSequenceNumber* sequence_number); | |
| 414 bool ProcessFrameData(const QuicPacketHeader& header); | |
| 415 bool ProcessStreamFrame(uint8 frame_type, QuicStreamFrame* frame); | |
| 416 bool ProcessAckFrame(uint8 frame_type, QuicAckFrame* frame); | |
| 417 bool ProcessTimestampsInAckFrame(QuicAckFrame* frame); | |
| 418 bool ProcessStopWaitingFrame(const QuicPacketHeader& public_header, | |
| 419 QuicStopWaitingFrame* stop_waiting); | |
| 420 bool ProcessRstStreamFrame(QuicRstStreamFrame* frame); | |
| 421 bool ProcessConnectionCloseFrame(QuicConnectionCloseFrame* frame); | |
| 422 bool ProcessGoAwayFrame(QuicGoAwayFrame* frame); | |
| 423 bool ProcessWindowUpdateFrame(QuicWindowUpdateFrame* frame); | |
| 424 bool ProcessBlockedFrame(QuicBlockedFrame* frame); | |
| 425 | |
| 426 bool DecryptPayload(const QuicPacketHeader& header, | |
| 427 const QuicEncryptedPacket& packet, | |
| 428 char* decrypted_buffer, | |
| 429 size_t buffer_length); | |
| 430 | |
| 431 // Returns the full packet sequence number from the truncated | |
| 432 // wire format version and the last seen packet sequence number. | |
| 433 QuicPacketSequenceNumber CalculatePacketSequenceNumberFromWire( | |
| 434 QuicSequenceNumberLength sequence_number_length, | |
| 435 QuicPacketSequenceNumber packet_sequence_number) const; | |
| 436 | |
| 437 // Returns the QuicTime::Delta corresponding to the time from when the framer | |
| 438 // was created. | |
| 439 const QuicTime::Delta CalculateTimestampFromWire(uint32 time_delta_us); | |
| 440 | |
| 441 // Computes the wire size in bytes of the |ack| frame, assuming no truncation. | |
| 442 size_t GetAckFrameSize(const QuicAckFrame& ack, | |
| 443 QuicSequenceNumberLength sequence_number_length); | |
| 444 | |
| 445 // Computes the wire size in bytes of the payload of |frame|. | |
| 446 size_t ComputeFrameLength(const QuicFrame& frame, | |
| 447 bool last_frame_in_packet, | |
| 448 InFecGroup is_in_fec_group, | |
| 449 QuicSequenceNumberLength sequence_number_length); | |
| 450 | |
| 451 static bool AppendPacketSequenceNumber( | |
| 452 QuicSequenceNumberLength sequence_number_length, | |
| 453 QuicPacketSequenceNumber packet_sequence_number, | |
| 454 QuicDataWriter* writer); | |
| 455 | |
| 456 static uint8 GetSequenceNumberFlags( | |
| 457 QuicSequenceNumberLength sequence_number_length); | |
| 458 | |
| 459 static AckFrameInfo GetAckFrameInfo(const QuicAckFrame& frame); | |
| 460 | |
| 461 // The Append* methods attempt to write the provided header or frame using the | |
| 462 // |writer|, and return true if successful. | |
| 463 bool AppendPacketHeader(const QuicPacketHeader& header, | |
| 464 QuicDataWriter* writer); | |
| 465 bool AppendTypeByte(const QuicFrame& frame, | |
| 466 bool last_frame_in_packet, | |
| 467 QuicDataWriter* writer); | |
| 468 bool AppendStreamFrame(const QuicStreamFrame& frame, | |
| 469 bool last_frame_in_packet, | |
| 470 QuicDataWriter* builder); | |
| 471 bool AppendAckFrameAndTypeByte(const QuicPacketHeader& header, | |
| 472 const QuicAckFrame& frame, | |
| 473 QuicDataWriter* builder); | |
| 474 bool AppendTimestampToAckFrame(const QuicAckFrame& frame, | |
| 475 QuicDataWriter* builder); | |
| 476 bool AppendStopWaitingFrame(const QuicPacketHeader& header, | |
| 477 const QuicStopWaitingFrame& frame, | |
| 478 QuicDataWriter* builder); | |
| 479 bool AppendRstStreamFrame(const QuicRstStreamFrame& frame, | |
| 480 QuicDataWriter* builder); | |
| 481 bool AppendConnectionCloseFrame(const QuicConnectionCloseFrame& frame, | |
| 482 QuicDataWriter* builder); | |
| 483 bool AppendGoAwayFrame(const QuicGoAwayFrame& frame, QuicDataWriter* writer); | |
| 484 bool AppendWindowUpdateFrame(const QuicWindowUpdateFrame& frame, | |
| 485 QuicDataWriter* writer); | |
| 486 bool AppendBlockedFrame(const QuicBlockedFrame& frame, | |
| 487 QuicDataWriter* writer); | |
| 488 | |
| 489 bool RaiseError(QuicErrorCode error); | |
| 490 | |
| 491 void set_error(QuicErrorCode error) { | |
| 492 error_ = error; | |
| 493 } | |
| 494 | |
| 495 void set_detailed_error(const char* error) { | |
| 496 detailed_error_ = error; | |
| 497 } | |
| 498 | |
| 499 std::string detailed_error_; | |
| 500 scoped_ptr<QuicDataReader> reader_; | |
| 501 QuicFramerVisitorInterface* visitor_; | |
| 502 QuicFecBuilderInterface* fec_builder_; | |
| 503 QuicReceivedEntropyHashCalculatorInterface* entropy_calculator_; | |
| 504 QuicErrorCode error_; | |
| 505 // Updated by ProcessPacketHeader when it succeeds. | |
| 506 QuicPacketSequenceNumber last_sequence_number_; | |
| 507 // Updated by WritePacketHeader. | |
| 508 QuicConnectionId last_serialized_connection_id_; | |
| 509 // Version of the protocol being used. | |
| 510 QuicVersion quic_version_; | |
| 511 // This vector contains QUIC versions which we currently support. | |
| 512 // This should be ordered such that the highest supported version is the first | |
| 513 // element, with subsequent elements in descending order (versions can be | |
| 514 // skipped as necessary). | |
| 515 QuicVersionVector supported_versions_; | |
| 516 // Primary decrypter used to decrypt packets during parsing. | |
| 517 scoped_ptr<QuicDecrypter> decrypter_; | |
| 518 // Alternative decrypter that can also be used to decrypt packets. | |
| 519 scoped_ptr<QuicDecrypter> alternative_decrypter_; | |
| 520 // The encryption level of |decrypter_|. | |
| 521 EncryptionLevel decrypter_level_; | |
| 522 // The encryption level of |alternative_decrypter_|. | |
| 523 EncryptionLevel alternative_decrypter_level_; | |
| 524 // |alternative_decrypter_latch_| is true if, when |alternative_decrypter_| | |
| 525 // successfully decrypts a packet, we should install it as the only | |
| 526 // decrypter. | |
| 527 bool alternative_decrypter_latch_; | |
| 528 // Encrypters used to encrypt packets via EncryptPacket(). | |
| 529 scoped_ptr<QuicEncrypter> encrypter_[NUM_ENCRYPTION_LEVELS]; | |
| 530 // Tracks if the framer is being used by the entity that received the | |
| 531 // connection or the entity that initiated it. | |
| 532 bool is_server_; | |
| 533 // If false, skip validation that the public flags are set to legal values. | |
| 534 bool validate_flags_; | |
| 535 // The time this framer was created. Time written to the wire will be | |
| 536 // written as a delta from this value. | |
| 537 QuicTime creation_time_; | |
| 538 // The time delta computed for the last timestamp frame. This is relative to | |
| 539 // the creation_time. | |
| 540 QuicTime::Delta last_timestamp_; | |
| 541 | |
| 542 DISALLOW_COPY_AND_ASSIGN(QuicFramer); | |
| 543 }; | |
| 544 | |
| 545 } // namespace net | |
| 546 | |
| 547 #endif // NET_QUIC_QUIC_FRAMER_H_ | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 992733002:
Remove //net (except for Android test stuff) and sdch (Closed)
Base URL: git@github.com:domokit/mojo.git@master