net/spdy/spdy_protocol.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/spdy/spdy_protocol.h"
   6
   7 namespace net {
   8
   9 SpdyFrameWithHeaderBlockIR::SpdyFrameWithHeaderBlockIR(SpdyStreamId stream_id)
  10     : SpdyFrameWithFinIR(stream_id) {}
  11
  12 SpdyFrameWithHeaderBlockIR::~SpdyFrameWithHeaderBlockIR() {}
  13
  14 SpdyDataIR::SpdyDataIR(SpdyStreamId stream_id, base::StringPiece data)
  15     : SpdyFrameWithFinIR(stream_id), padded_(false), padding_payload_len_(0) {
  16   SetDataDeep(data);
  17 }
  18
  19 SpdyDataIR::SpdyDataIR(SpdyStreamId stream_id)
  20     : SpdyFrameWithFinIR(stream_id),
  21       padded_(false),
  22       padding_payload_len_(0) {}
  23
  24 SpdyDataIR::~SpdyDataIR() {}
  25
  26 bool SpdyConstants::IsValidFrameType(SpdyMajorVersion version,
  27                                      int frame_type_field) {
  28   switch (version) {
  29     case SPDY2:
  30     case SPDY3:
  31       // SYN_STREAM is the first valid frame.
  32       if (frame_type_field < SerializeFrameType(version, SYN_STREAM)) {
  33         return false;
  34       }
  35
  36       // WINDOW_UPDATE is the last valid frame.
  37       if (frame_type_field > SerializeFrameType(version, WINDOW_UPDATE)) {
  38         return false;
  39       }
  40
  41       return true;
  42     case HTTP2:
  43       // Check for recognized extensions.
  44       if (frame_type_field == SerializeFrameType(version, ALTSVC) ||
  45           frame_type_field == SerializeFrameType(version, BLOCKED)) {
  46         return true;
  47       }
  48
  49       // DATA is the first valid frame.
  50       if (frame_type_field < SerializeFrameType(version, DATA)) {
  51         return false;
  52       }
  53
  54       // CONTINUATION is the last valid frame.
  55       if (frame_type_field > SerializeFrameType(version, CONTINUATION)) {
  56         return false;
  57       }
  58
  59       return true;
  60   }
  61
  62   LOG(DFATAL) << "Unhandled SPDY version " << version;
  63   return false;
  64 }
  65
  66 SpdyFrameType SpdyConstants::ParseFrameType(SpdyMajorVersion version,
  67                                             int frame_type_field) {
  68   switch (version) {
  69     case SPDY2:
  70     case SPDY3:
  71       switch (frame_type_field) {
  72         case 1:
  73           return SYN_STREAM;
  74         case 2:
  75           return SYN_REPLY;
  76         case 3:
  77           return RST_STREAM;
  78         case 4:
  79           return SETTINGS;
  80         case 6:
  81           return PING;
  82         case 7:
  83           return GOAWAY;
  84         case 8:
  85           return HEADERS;
  86         case 9:
  87           return WINDOW_UPDATE;
  88       }
  89       break;
  90     case HTTP2:
  91       switch (frame_type_field) {
  92         case 0:
  93           return DATA;
  94         case 1:
  95           return HEADERS;
  96         case 2:
  97           return PRIORITY;
  98         case 3:
  99           return RST_STREAM;
 100         case 4:
 101           return SETTINGS;
 102         case 5:
 103           return PUSH_PROMISE;
 104         case 6:
 105           return PING;
 106         case 7:
 107           return GOAWAY;
 108         case 8:
 109           return WINDOW_UPDATE;
 110         case 9:
 111           return CONTINUATION;
 112         case 10:
 113           return ALTSVC;
 114         case 11:
 115           return BLOCKED;
 116       }
 117       break;
 118   }
 119
 120   LOG(DFATAL) << "Unhandled frame type " << frame_type_field;
 121   return DATA;
 122 }
 123
 124 int SpdyConstants::SerializeFrameType(SpdyMajorVersion version,
 125                                       SpdyFrameType frame_type) {
 126   switch (version) {
 127     case SPDY2:
 128     case SPDY3:
 129       switch (frame_type) {
 130         case SYN_STREAM:
 131           return 1;
 132         case SYN_REPLY:
 133           return 2;
 134         case RST_STREAM:
 135           return 3;
 136         case SETTINGS:
 137           return 4;
 138         case PING:
 139           return 6;
 140         case GOAWAY:
 141           return 7;
 142         case HEADERS:
 143           return 8;
 144         case WINDOW_UPDATE:
 145           return 9;
 146         default:
 147           LOG(DFATAL) << "Serializing unhandled frame type " << frame_type;
 148           return -1;
 149       }
 150     case HTTP2:
 151       switch (frame_type) {
 152         case DATA:
 153           return 0;
 154         case HEADERS:
 155           return 1;
 156         case PRIORITY:
 157           return 2;
 158         case RST_STREAM:
 159           return 3;
 160         case SETTINGS:
 161           return 4;
 162         case PUSH_PROMISE:
 163           return 5;
 164         case PING:
 165           return 6;
 166         case GOAWAY:
 167           return 7;
 168         case WINDOW_UPDATE:
 169           return 8;
 170         case CONTINUATION:
 171           return 9;
 172         // ALTSVC and BLOCKED are extensions.
 173         case ALTSVC:
 174           return 10;
 175         case BLOCKED:
 176           return 11;
 177         default:
 178           LOG(DFATAL) << "Serializing unhandled frame type " << frame_type;
 179           return -1;
 180       }
 181   }
 182
 183   LOG(DFATAL) << "Unhandled SPDY version " << version;
 184   return -1;
 185 }
 186
 187 int SpdyConstants::DataFrameType(SpdyMajorVersion version) {
 188   switch (version) {
 189     case SPDY2:
 190     case SPDY3:
 191       return 0;
 192     case HTTP2:
 193       return SerializeFrameType(version, DATA);
 194   }
 195
 196   LOG(DFATAL) << "Unhandled SPDY version " << version;
 197   return 0;
 198 }
 199
 200 bool SpdyConstants::IsValidSettingId(SpdyMajorVersion version,
 201                                      int setting_id_field) {
 202   switch (version) {
 203     case SPDY2:
 204     case SPDY3:
 205       // UPLOAD_BANDWIDTH is the first valid setting id.
 206       if (setting_id_field <
 207           SerializeSettingId(version, SETTINGS_UPLOAD_BANDWIDTH)) {
 208         return false;
 209       }
 210
 211       // INITIAL_WINDOW_SIZE is the last valid setting id.
 212       if (setting_id_field >
 213           SerializeSettingId(version, SETTINGS_INITIAL_WINDOW_SIZE)) {
 214         return false;
 215       }
 216
 217       return true;
 218     case HTTP2:
 219       // HEADER_TABLE_SIZE is the first valid setting id.
 220       if (setting_id_field <
 221           SerializeSettingId(version, SETTINGS_HEADER_TABLE_SIZE)) {
 222         return false;
 223       }
 224
 225       // MAX_HEADER_LIST_SIZE is the last valid setting id.
 226       if (setting_id_field >
 227           SerializeSettingId(version, SETTINGS_MAX_HEADER_LIST_SIZE)) {
 228         return false;
 229       }
 230
 231       return true;
 232   }
 233
 234   LOG(DFATAL) << "Unhandled SPDY version " << version;
 235   return false;
 236 }
 237
 238 SpdySettingsIds SpdyConstants::ParseSettingId(SpdyMajorVersion version,
 239                                               int setting_id_field) {
 240   switch (version) {
 241     case SPDY2:
 242     case SPDY3:
 243       switch (setting_id_field) {
 244         case 1:
 245           return SETTINGS_UPLOAD_BANDWIDTH;
 246         case 2:
 247           return SETTINGS_DOWNLOAD_BANDWIDTH;
 248         case 3:
 249           return SETTINGS_ROUND_TRIP_TIME;
 250         case 4:
 251           return SETTINGS_MAX_CONCURRENT_STREAMS;
 252         case 5:
 253           return SETTINGS_CURRENT_CWND;
 254         case 6:
 255           return SETTINGS_DOWNLOAD_RETRANS_RATE;
 256         case 7:
 257           return SETTINGS_INITIAL_WINDOW_SIZE;
 258       }
 259       break;
 260     case HTTP2:
 261       switch (setting_id_field) {
 262         case 1:
 263           return SETTINGS_HEADER_TABLE_SIZE;
 264         case 2:
 265           return SETTINGS_ENABLE_PUSH;
 266         case 3:
 267           return SETTINGS_MAX_CONCURRENT_STREAMS;
 268         case 4:
 269           return SETTINGS_INITIAL_WINDOW_SIZE;
 270         case 5:
 271           return SETTINGS_MAX_FRAME_SIZE;
 272         case 6:
 273           return SETTINGS_MAX_HEADER_LIST_SIZE;
 274       }
 275       break;
 276   }
 277
 278   LOG(DFATAL) << "Unhandled setting ID " << setting_id_field;
 279   return SETTINGS_UPLOAD_BANDWIDTH;
 280 }
 281
 282 int SpdyConstants::SerializeSettingId(SpdyMajorVersion version,
 283                                        SpdySettingsIds id) {
 284   switch (version) {
 285     case SPDY2:
 286     case SPDY3:
 287       switch (id) {
 288         case SETTINGS_UPLOAD_BANDWIDTH:
 289           return 1;
 290         case SETTINGS_DOWNLOAD_BANDWIDTH:
 291           return 2;
 292         case SETTINGS_ROUND_TRIP_TIME:
 293           return 3;
 294         case SETTINGS_MAX_CONCURRENT_STREAMS:
 295           return 4;
 296         case SETTINGS_CURRENT_CWND:
 297           return 5;
 298         case SETTINGS_DOWNLOAD_RETRANS_RATE:
 299           return 6;
 300         case SETTINGS_INITIAL_WINDOW_SIZE:
 301           return 7;
 302         default:
 303           LOG(DFATAL) << "Serializing unhandled setting id " << id;
 304           return -1;
 305       }
 306     case HTTP2:
 307       switch (id) {
 308         case SETTINGS_HEADER_TABLE_SIZE:
 309           return 1;
 310         case SETTINGS_ENABLE_PUSH:
 311           return 2;
 312         case SETTINGS_MAX_CONCURRENT_STREAMS:
 313           return 3;
 314         case SETTINGS_INITIAL_WINDOW_SIZE:
 315           return 4;
 316         case SETTINGS_MAX_FRAME_SIZE:
 317           return 5;
 318         case SETTINGS_MAX_HEADER_LIST_SIZE:
 319           return 6;
 320         default:
 321           LOG(DFATAL) << "Serializing unhandled setting id " << id;
 322           return -1;
 323       }
 324   }
 325   LOG(DFATAL) << "Unhandled SPDY version " << version;
 326   return -1;
 327 }
 328
 329 bool SpdyConstants::IsValidRstStreamStatus(SpdyMajorVersion version,
 330                                            int rst_stream_status_field) {
 331   switch (version) {
 332     case SPDY2:
 333     case SPDY3:
 334       // PROTOCOL_ERROR is the valid first status code.
 335       if (rst_stream_status_field <
 336           SerializeRstStreamStatus(version, RST_STREAM_PROTOCOL_ERROR)) {
 337         return false;
 338       }
 339
 340       // FRAME_TOO_LARGE is the valid last status code.
 341       if (rst_stream_status_field >
 342           SerializeRstStreamStatus(version, RST_STREAM_FRAME_TOO_LARGE)) {
 343         return false;
 344       }
 345
 346       return true;
 347     case HTTP2:
 348       // NO_ERROR is the first valid status code.
 349       if (rst_stream_status_field <
 350           SerializeRstStreamStatus(version, RST_STREAM_PROTOCOL_ERROR)) {
 351         return false;
 352       }
 353
 354       // TODO(hkhalil): Omit COMPRESSION_ERROR and SETTINGS_TIMEOUT
 355       /*
 356       // This works because GOAWAY and RST_STREAM share a namespace.
 357       if (rst_stream_status_field ==
 358           SerializeGoAwayStatus(version, GOAWAY_COMPRESSION_ERROR) ||
 359           rst_stream_status_field ==
 360           SerializeGoAwayStatus(version, GOAWAY_SETTINGS_TIMEOUT)) {
 361         return false;
 362       }
 363       */
 364
 365       // HTTP_1_1_REQUIRED is the last valid status code.
 366       if (rst_stream_status_field >
 367           SerializeRstStreamStatus(version, RST_STREAM_HTTP_1_1_REQUIRED)) {
 368         return false;
 369       }
 370
 371       return true;
 372   }
 373   LOG(DFATAL) << "Unhandled SPDY version " << version;
 374   return false;
 375 }
 376
 377 SpdyRstStreamStatus SpdyConstants::ParseRstStreamStatus(
 378     SpdyMajorVersion version,
 379     int rst_stream_status_field) {
 380   switch (version) {
 381     case SPDY2:
 382     case SPDY3:
 383       switch (rst_stream_status_field) {
 384         case 1:
 385           return RST_STREAM_PROTOCOL_ERROR;
 386         case 2:
 387           return RST_STREAM_INVALID_STREAM;
 388         case 3:
 389           return RST_STREAM_REFUSED_STREAM;
 390         case 4:
 391           return RST_STREAM_UNSUPPORTED_VERSION;
 392         case 5:
 393           return RST_STREAM_CANCEL;
 394         case 6:
 395           return RST_STREAM_INTERNAL_ERROR;
 396         case 7:
 397           return RST_STREAM_FLOW_CONTROL_ERROR;
 398         case 8:
 399           return RST_STREAM_STREAM_IN_USE;
 400         case 9:
 401           return RST_STREAM_STREAM_ALREADY_CLOSED;
 402         case 10:
 403           return RST_STREAM_INVALID_CREDENTIALS;
 404         case 11:
 405           return RST_STREAM_FRAME_TOO_LARGE;
 406       }
 407       break;
 408     case HTTP2:
 409       switch (rst_stream_status_field) {
 410         case 1:
 411           return RST_STREAM_PROTOCOL_ERROR;
 412         case 2:
 413           return RST_STREAM_INTERNAL_ERROR;
 414         case 3:
 415           return RST_STREAM_FLOW_CONTROL_ERROR;
 416         case 5:
 417           return RST_STREAM_STREAM_CLOSED;
 418         case 6:
 419           return RST_STREAM_FRAME_SIZE_ERROR;
 420         case 7:
 421           return RST_STREAM_REFUSED_STREAM;
 422         case 8:
 423           return RST_STREAM_CANCEL;
 424         case 10:
 425           return RST_STREAM_CONNECT_ERROR;
 426         case 11:
 427           return RST_STREAM_ENHANCE_YOUR_CALM;
 428         case 12:
 429           return RST_STREAM_INADEQUATE_SECURITY;
 430         case 13:
 431           return RST_STREAM_HTTP_1_1_REQUIRED;
 432       }
 433       break;
 434   }
 435
 436   LOG(DFATAL) << "Invalid RST_STREAM status " << rst_stream_status_field;
 437   return RST_STREAM_PROTOCOL_ERROR;
 438 }
 439
 440 int SpdyConstants::SerializeRstStreamStatus(
 441     SpdyMajorVersion version,
 442     SpdyRstStreamStatus rst_stream_status) {
 443   switch (version) {
 444     case SPDY2:
 445     case SPDY3:
 446       switch (rst_stream_status) {
 447         case RST_STREAM_PROTOCOL_ERROR:
 448           return 1;
 449         case RST_STREAM_INVALID_STREAM:
 450           return 2;
 451         case RST_STREAM_REFUSED_STREAM:
 452           return 3;
 453         case RST_STREAM_UNSUPPORTED_VERSION:
 454           return 4;
 455         case RST_STREAM_CANCEL:
 456           return 5;
 457         case RST_STREAM_INTERNAL_ERROR:
 458           return 6;
 459         case RST_STREAM_FLOW_CONTROL_ERROR:
 460           return 7;
 461         case RST_STREAM_STREAM_IN_USE:
 462           return 8;
 463         case RST_STREAM_STREAM_ALREADY_CLOSED:
 464           return 9;
 465         case RST_STREAM_INVALID_CREDENTIALS:
 466           return 10;
 467         case RST_STREAM_FRAME_TOO_LARGE:
 468           return 11;
 469         default:
 470           LOG(DFATAL) << "Unhandled RST_STREAM status "
 471                       << rst_stream_status;
 472           return -1;
 473       }
 474     case HTTP2:
 475       switch (rst_stream_status) {
 476         case RST_STREAM_PROTOCOL_ERROR:
 477           return 1;
 478         case RST_STREAM_INTERNAL_ERROR:
 479           return 2;
 480         case RST_STREAM_FLOW_CONTROL_ERROR:
 481           return 3;
 482         case RST_STREAM_STREAM_CLOSED:
 483           return 5;
 484         case RST_STREAM_FRAME_SIZE_ERROR:
 485           return 6;
 486         case RST_STREAM_REFUSED_STREAM:
 487           return 7;
 488         case RST_STREAM_CANCEL:
 489           return 8;
 490         case RST_STREAM_CONNECT_ERROR:
 491           return 10;
 492         case RST_STREAM_ENHANCE_YOUR_CALM:
 493           return 11;
 494         case RST_STREAM_INADEQUATE_SECURITY:
 495           return 12;
 496         case RST_STREAM_HTTP_1_1_REQUIRED:
 497           return 13;
 498         default:
 499           LOG(DFATAL) << "Unhandled RST_STREAM status "
 500                       << rst_stream_status;
 501           return -1;
 502       }
 503   }
 504   LOG(DFATAL) << "Unhandled SPDY version " << version;
 505   return -1;
 506 }
 507
 508 bool SpdyConstants::IsValidGoAwayStatus(SpdyMajorVersion version,
 509                                         int goaway_status_field) {
 510   switch (version) {
 511     case SPDY2:
 512     case SPDY3:
 513       // GOAWAY_OK is the first valid status.
 514       if (goaway_status_field < SerializeGoAwayStatus(version, GOAWAY_OK)) {
 515         return false;
 516       }
 517
 518       // GOAWAY_INTERNAL_ERROR is the last valid status.
 519       if (goaway_status_field > SerializeGoAwayStatus(version,
 520                                                       GOAWAY_INTERNAL_ERROR)) {
 521         return false;
 522       }
 523
 524       return true;
 525     case HTTP2:
 526       // GOAWAY_NO_ERROR is the first valid status.
 527       if (goaway_status_field < SerializeGoAwayStatus(version,
 528                                                       GOAWAY_NO_ERROR)) {
 529         return false;
 530       }
 531
 532       // GOAWAY_HTTP_1_1_REQUIRED is the last valid status.
 533       if (goaway_status_field >
 534           SerializeGoAwayStatus(version, GOAWAY_HTTP_1_1_REQUIRED)) {
 535         return false;
 536       }
 537
 538       return true;
 539   }
 540   LOG(DFATAL) << "Unknown SpdyMajorVersion " << version;
 541   return false;
 542 }
 543
 544 SpdyGoAwayStatus SpdyConstants::ParseGoAwayStatus(SpdyMajorVersion version,
 545                                                   int goaway_status_field) {
 546   switch (version) {
 547     case SPDY2:
 548     case SPDY3:
 549       switch (goaway_status_field) {
 550         case 0:
 551           return GOAWAY_OK;
 552         case 1:
 553           return GOAWAY_PROTOCOL_ERROR;
 554         case 2:
 555           return GOAWAY_INTERNAL_ERROR;
 556       }
 557       break;
 558     case HTTP2:
 559       switch (goaway_status_field) {
 560         case 0:
 561           return GOAWAY_NO_ERROR;
 562         case 1:
 563           return GOAWAY_PROTOCOL_ERROR;
 564         case 2:
 565           return GOAWAY_INTERNAL_ERROR;
 566         case 3:
 567           return GOAWAY_FLOW_CONTROL_ERROR;
 568         case 4:
 569           return GOAWAY_SETTINGS_TIMEOUT;
 570         case 5:
 571           return GOAWAY_STREAM_CLOSED;
 572         case 6:
 573           return GOAWAY_FRAME_SIZE_ERROR;
 574         case 7:
 575           return GOAWAY_REFUSED_STREAM;
 576         case 8:
 577           return GOAWAY_CANCEL;
 578         case 9:
 579           return GOAWAY_COMPRESSION_ERROR;
 580         case 10:
 581           return GOAWAY_CONNECT_ERROR;
 582         case 11:
 583           return GOAWAY_ENHANCE_YOUR_CALM;
 584         case 12:
 585           return GOAWAY_INADEQUATE_SECURITY;
 586         case 13:
 587           return GOAWAY_HTTP_1_1_REQUIRED;
 588       }
 589       break;
 590   }
 591
 592   LOG(DFATAL) << "Unhandled GOAWAY status " << goaway_status_field;
 593   return GOAWAY_PROTOCOL_ERROR;
 594 }
 595
 596 SpdyMajorVersion SpdyConstants::ParseMajorVersion(int version_number) {
 597   switch (version_number) {
 598     case 2:
 599       return SPDY2;
 600     case 3:
 601       return SPDY3;
 602     case 4:
 603       return HTTP2;
 604     default:
 605       LOG(DFATAL) << "Unsupported SPDY version number: " << version_number;
 606       return SPDY3;
 607   }
 608 }
 609
 610 int SpdyConstants::SerializeMajorVersion(SpdyMajorVersion version) {
 611   switch (version) {
 612     case SPDY2:
 613       return 2;
 614     case SPDY3:
 615       return 3;
 616     case HTTP2:
 617       return 4;
 618     default:
 619       LOG(DFATAL) << "Unsupported SPDY major version: " << version;
 620       return -1;
 621   }
 622 }
 623
 624 std::string SpdyConstants::GetVersionString(SpdyMajorVersion version) {
 625   switch (version) {
 626     case SPDY2:
 627       return "spdy/2";
 628     case SPDY3:
 629       return "spdy/3";
 630     case HTTP2:
 631       return "h2";
 632     default:
 633       LOG(DFATAL) << "Unsupported SPDY major version: " << version;
 634       return "spdy/3";
 635   }
 636 }
 637
 638 int SpdyConstants::SerializeGoAwayStatus(SpdyMajorVersion version,
 639                                          SpdyGoAwayStatus status) {
 640   switch (version) {
 641     case SPDY2:
 642     case SPDY3:
 643       // TODO(jgraettinger): Merge this back to server-side.
 644       switch (status) {
 645         case GOAWAY_NO_ERROR:
 646           return 0;
 647         case GOAWAY_PROTOCOL_ERROR:
 648         case GOAWAY_INTERNAL_ERROR:
 649         case GOAWAY_FLOW_CONTROL_ERROR:
 650         case GOAWAY_SETTINGS_TIMEOUT:
 651         case GOAWAY_STREAM_CLOSED:
 652         case GOAWAY_FRAME_SIZE_ERROR:
 653         case GOAWAY_REFUSED_STREAM:
 654         case GOAWAY_CANCEL:
 655         case GOAWAY_COMPRESSION_ERROR:
 656         case GOAWAY_CONNECT_ERROR:
 657         case GOAWAY_ENHANCE_YOUR_CALM:
 658         case GOAWAY_INADEQUATE_SECURITY:
 659         case GOAWAY_HTTP_1_1_REQUIRED:
 660           return 1;  // PROTOCOL_ERROR.
 661         default:
 662           LOG(DFATAL) << "Serializing unhandled GOAWAY status " << status;
 663           return -1;
 664       }
 665     case HTTP2:
 666       switch (status) {
 667         case GOAWAY_NO_ERROR:
 668           return 0;
 669         case GOAWAY_PROTOCOL_ERROR:
 670           return 1;
 671         case GOAWAY_INTERNAL_ERROR:
 672           return 2;
 673         case GOAWAY_FLOW_CONTROL_ERROR:
 674           return 3;
 675         case GOAWAY_SETTINGS_TIMEOUT:
 676           return 4;
 677         case GOAWAY_STREAM_CLOSED:
 678           return 5;
 679         case GOAWAY_FRAME_SIZE_ERROR:
 680           return 6;
 681         case GOAWAY_REFUSED_STREAM:
 682           return 7;
 683         case GOAWAY_CANCEL:
 684           return 8;
 685         case GOAWAY_COMPRESSION_ERROR:
 686           return 9;
 687         case GOAWAY_CONNECT_ERROR:
 688           return 10;
 689         case GOAWAY_ENHANCE_YOUR_CALM:
 690           return 11;
 691         case GOAWAY_INADEQUATE_SECURITY:
 692           return 12;
 693         case GOAWAY_HTTP_1_1_REQUIRED:
 694           return 13;
 695         default:
 696           LOG(DFATAL) << "Serializing unhandled GOAWAY status " << status;
 697           return -1;
 698       }
 699   }
 700   LOG(DFATAL) << "Unknown SpdyMajorVersion " << version;
 701   return -1;
 702 }
 703
 704 size_t SpdyConstants::GetDataFrameMinimumSize(SpdyMajorVersion version) {
 705   switch (version) {
 706     case SPDY2:
 707     case SPDY3:
 708       return 8;
 709     case HTTP2:
 710       return 9;
 711   }
 712   LOG(DFATAL) << "Unhandled SPDY version.";
 713   return 0;
 714 }
 715
 716 size_t SpdyConstants::GetControlFrameHeaderSize(SpdyMajorVersion version) {
 717   switch (version) {
 718     case SPDY2:
 719     case SPDY3:
 720       return 8;
 721     case HTTP2:
 722       return 9;
 723   }
 724   LOG(DFATAL) << "Unhandled SPDY version.";
 725   return 0;
 726 }
 727
 728 size_t SpdyConstants::GetPrefixLength(SpdyFrameType type,
 729                                       SpdyMajorVersion version) {
 730   if (type != DATA) {
 731      return GetControlFrameHeaderSize(version);
 732   } else {
 733      return GetDataFrameMinimumSize(version);
 734   }
 735 }
 736
 737 size_t SpdyConstants::GetFrameMaximumSize(SpdyMajorVersion version) {
 738   if (version < HTTP2) {
 739     // 24-bit length field plus eight-byte frame header.
 740     return ((1<<24) - 1) + 8;
 741   } else {
 742     // Max payload of 2^14 plus nine-byte frame header.
 743     // TODO(mlavan): In HTTP/2 this is actually not a constant;
 744     // payload size can be set using the MAX_FRAME_SIZE setting to
 745     // anything between 1 << 14 and (1 << 24) - 1
 746     return (1 << 14) + 9;
 747   }
 748 }
 749
 750 size_t SpdyConstants::GetSizeOfSizeField(SpdyMajorVersion version) {
 751   return (version < SPDY3) ? sizeof(uint16) : sizeof(uint32);
 752 }
 753
 754 size_t SpdyConstants::GetSettingSize(SpdyMajorVersion version) {
 755   return version <= SPDY3 ? 8 : 6;
 756 }
 757
 758 int32 SpdyConstants::GetInitialStreamWindowSize(SpdyMajorVersion version) {
 759   return (version <= SPDY3) ? (64 * 1024) : (64 * 1024 - 1);
 760 }
 761
 762 int32 SpdyConstants::GetInitialSessionWindowSize(SpdyMajorVersion version) {
 763   return (version <= SPDY3) ? (64 * 1024) : (64 * 1024 - 1);
 764 }
 765
 766 void SpdyDataIR::Visit(SpdyFrameVisitor* visitor) const {
 767   return visitor->VisitData(*this);
 768 }
 769
 770 void SpdySynStreamIR::Visit(SpdyFrameVisitor* visitor) const {
 771   return visitor->VisitSynStream(*this);
 772 }
 773
 774 void SpdySynReplyIR::Visit(SpdyFrameVisitor* visitor) const {
 775   return visitor->VisitSynReply(*this);
 776 }
 777
 778 SpdyRstStreamIR::SpdyRstStreamIR(SpdyStreamId stream_id,
 779                                  SpdyRstStreamStatus status,
 780                                  base::StringPiece description)
 781     : SpdyFrameWithStreamIdIR(stream_id),
 782       description_(description) {
 783   set_status(status);
 784 }
 785
 786 SpdyRstStreamIR::~SpdyRstStreamIR() {}
 787
 788 void SpdyRstStreamIR::Visit(SpdyFrameVisitor* visitor) const {
 789   return visitor->VisitRstStream(*this);
 790 }
 791
 792 SpdySettingsIR::SpdySettingsIR()
 793     : clear_settings_(false),
 794       is_ack_(false) {}
 795
 796 SpdySettingsIR::~SpdySettingsIR() {}
 797
 798 void SpdySettingsIR::Visit(SpdyFrameVisitor* visitor) const {
 799   return visitor->VisitSettings(*this);
 800 }
 801
 802 void SpdyPingIR::Visit(SpdyFrameVisitor* visitor) const {
 803   return visitor->VisitPing(*this);
 804 }
 805
 806 SpdyGoAwayIR::SpdyGoAwayIR(SpdyStreamId last_good_stream_id,
 807                            SpdyGoAwayStatus status,
 808                            base::StringPiece description)
 809     : description_(description) {
 810       set_last_good_stream_id(last_good_stream_id);
 811   set_status(status);
 812 }
 813
 814 SpdyGoAwayIR::~SpdyGoAwayIR() {}
 815
 816 const base::StringPiece& SpdyGoAwayIR::description() const {
 817   return description_;
 818 }
 819
 820 void SpdyGoAwayIR::Visit(SpdyFrameVisitor* visitor) const {
 821   return visitor->VisitGoAway(*this);
 822 }
 823
 824 void SpdyHeadersIR::Visit(SpdyFrameVisitor* visitor) const {
 825   return visitor->VisitHeaders(*this);
 826 }
 827
 828 void SpdyWindowUpdateIR::Visit(SpdyFrameVisitor* visitor) const {
 829   return visitor->VisitWindowUpdate(*this);
 830 }
 831
 832 void SpdyBlockedIR::Visit(SpdyFrameVisitor* visitor) const {
 833   return visitor->VisitBlocked(*this);
 834 }
 835
 836 void SpdyPushPromiseIR::Visit(SpdyFrameVisitor* visitor) const {
 837   return visitor->VisitPushPromise(*this);
 838 }
 839
 840 void SpdyContinuationIR::Visit(SpdyFrameVisitor* visitor) const {
 841   return visitor->VisitContinuation(*this);
 842 }
 843
 844 SpdyAltSvcIR::SpdyAltSvcIR(SpdyStreamId stream_id)
 845     : SpdyFrameWithStreamIdIR(stream_id) {
 846 }
 847
 848 SpdyAltSvcIR::~SpdyAltSvcIR() {
 849 }
 850
 851 void SpdyAltSvcIR::Visit(SpdyFrameVisitor* visitor) const {
 852   return visitor->VisitAltSvc(*this);
 853 }
 854
 855 void SpdyPriorityIR::Visit(SpdyFrameVisitor* visitor) const {
 856   return visitor->VisitPriority(*this);
 857 }
 858
 859 }  // namespace net