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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef NET_SPDY_SPDY_FRAMER_H_ | 5 #ifndef NET_SPDY_SPDY_FRAMER_H_ |
| 6 #define NET_SPDY_SPDY_FRAMER_H_ | 6 #define NET_SPDY_SPDY_FRAMER_H_ |
| 7 #pragma once | 7 #pragma once |
| 8 | 8 |
| 9 #include <list> | 9 #include <list> |
| 10 #include <map> | 10 #include <map> |
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| 373 // On failure, returns NULL. | 373 // On failure, returns NULL. |
| 374 SpdyFrame* CompressFrame(const SpdyFrame& frame); | 374 SpdyFrame* CompressFrame(const SpdyFrame& frame); |
| 375 | 375 |
| 376 // Create a copy of a frame. | 376 // Create a copy of a frame. |
| 377 // Returned frame must be freed with "delete". | 377 // Returned frame must be freed with "delete". |
| 378 SpdyFrame* DuplicateFrame(const SpdyFrame& frame); | 378 SpdyFrame* DuplicateFrame(const SpdyFrame& frame); |
| 379 | 379 |
| 380 // Returns true if a frame could be compressed. | 380 // Returns true if a frame could be compressed. |
| 381 bool IsCompressible(const SpdyFrame& frame) const; | 381 bool IsCompressible(const SpdyFrame& frame) const; |
| 382 | 382 |
| 383 SpdyControlFrame* CompressControlFrame(const SpdyControlFrame& frame); |
| 384 |
| 383 // Get the minimum size of the control frame for the given control frame | 385 // Get the minimum size of the control frame for the given control frame |
| 384 // type. This is useful for validating frame blocks. | 386 // type. This is useful for validating frame blocks. |
| 385 static size_t GetMinimumControlFrameSize(int version, SpdyControlType type); | 387 static size_t GetMinimumControlFrameSize(int version, SpdyControlType type); |
| 386 | 388 |
| 387 // Get the stream ID for the given control frame (SYN_STREAM, SYN_REPLY, and | 389 // Get the stream ID for the given control frame (SYN_STREAM, SYN_REPLY, and |
| 388 // HEADERS). If the control frame is NULL or of another type, this | 390 // HEADERS). If the control frame is NULL or of another type, this |
| 389 // function returns kInvalidStream. | 391 // function returns kInvalidStream. |
| 390 static SpdyStreamId GetControlFrameStreamId( | 392 static SpdyStreamId GetControlFrameStreamId( |
| 391 const SpdyControlFrame* control_frame); | 393 const SpdyControlFrame* control_frame); |
| 392 | 394 |
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| 459 // Helpers for above internal breakouts from ProcessInput. | 461 // Helpers for above internal breakouts from ProcessInput. |
| 460 void ProcessControlFrameHeader(); | 462 void ProcessControlFrameHeader(); |
| 461 bool ProcessSetting(const char* data); // Always passed exactly 8 bytes. | 463 bool ProcessSetting(const char* data); // Always passed exactly 8 bytes. |
| 462 | 464 |
| 463 // Get (and lazily initialize) the ZLib state. | 465 // Get (and lazily initialize) the ZLib state. |
| 464 z_stream* GetHeaderCompressor(); | 466 z_stream* GetHeaderCompressor(); |
| 465 z_stream* GetHeaderDecompressor(); | 467 z_stream* GetHeaderDecompressor(); |
| 466 z_stream* GetStreamDecompressor(SpdyStreamId id); | 468 z_stream* GetStreamDecompressor(SpdyStreamId id); |
| 467 | 469 |
| 468 // Compression helpers | 470 // Compression helpers |
| 469 SpdyControlFrame* CompressControlFrame(const SpdyControlFrame& frame); | |
| 470 void CleanupCompressorForStream(SpdyStreamId id); | 471 void CleanupCompressorForStream(SpdyStreamId id); |
| 471 void CleanupDecompressorForStream(SpdyStreamId id); | 472 void CleanupDecompressorForStream(SpdyStreamId id); |
| 472 void CleanupStreamCompressorsAndDecompressors(); | 473 void CleanupStreamCompressorsAndDecompressors(); |
| 473 | 474 |
| 474 // Deliver the given control frame's compressed headers block to the visitor | 475 // Deliver the given control frame's compressed headers block to the visitor |
| 475 // in decompressed form, in chunks. Returns true if the visitor has | 476 // in decompressed form, in chunks. Returns true if the visitor has |
| 476 // accepted all of the chunks. | 477 // accepted all of the chunks. |
| 477 bool IncrementallyDecompressControlFrameHeaderData( | 478 bool IncrementallyDecompressControlFrameHeaderData( |
| 478 const SpdyControlFrame* frame, | 479 const SpdyControlFrame* frame, |
| 479 const char* data, | 480 const char* data, |
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| 578 // starts with HTTP. If it does, we likely have an HTTP response. This | 579 // starts with HTTP. If it does, we likely have an HTTP response. This |
| 579 // isn't guaranteed though: we could have gotten a settings frame and then | 580 // isn't guaranteed though: we could have gotten a settings frame and then |
| 580 // corrupt data that just looks like HTTP, but deterministic checking requires | 581 // corrupt data that just looks like HTTP, but deterministic checking requires |
| 581 // a lot more state. | 582 // a lot more state. |
| 582 bool probable_http_response_; | 583 bool probable_http_response_; |
| 583 }; | 584 }; |
| 584 | 585 |
| 585 } // namespace net | 586 } // namespace net |
| 586 | 587 |
| 587 #endif // NET_SPDY_SPDY_FRAMER_H_ | 588 #endif // NET_SPDY_SPDY_FRAMER_H_ |
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