OLD | NEW |
(Empty) | |
| 1 // Copyright 2016 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/http2/decoder/payload_decoders/window_update_payload_decoder.h" |
| 6 |
| 7 #include "base/logging.h" |
| 8 #include "net/http2/decoder/decode_buffer.h" |
| 9 #include "net/http2/decoder/decode_http2_structures.h" |
| 10 #include "net/http2/decoder/http2_frame_decoder_listener.h" |
| 11 #include "net/http2/http2_constants.h" |
| 12 #include "net/http2/http2_structures.h" |
| 13 |
| 14 namespace net { |
| 15 |
| 16 DecodeStatus WindowUpdatePayloadDecoder::StartDecodingPayload( |
| 17 FrameDecoderState* state, |
| 18 DecodeBuffer* db) { |
| 19 const Http2FrameHeader& frame_header = state->frame_header(); |
| 20 const uint32_t total_length = frame_header.payload_length; |
| 21 |
| 22 DVLOG(2) << "WindowUpdatePayloadDecoder::StartDecodingPayload: " |
| 23 << frame_header; |
| 24 |
| 25 DCHECK_EQ(Http2FrameType::WINDOW_UPDATE, frame_header.type); |
| 26 DCHECK_LE(db->Remaining(), total_length); |
| 27 |
| 28 // WINDOW_UPDATE frames have no flags. |
| 29 DCHECK_EQ(0, frame_header.flags); |
| 30 |
| 31 // Special case for when the payload is the correct size and entirely in |
| 32 // the buffer. |
| 33 if (db->Remaining() == Http2WindowUpdateFields::EncodedSize() && |
| 34 total_length == Http2WindowUpdateFields::EncodedSize()) { |
| 35 DoDecode(&window_update_fields_, db); |
| 36 state->listener()->OnWindowUpdate( |
| 37 frame_header, window_update_fields_.window_size_increment); |
| 38 return DecodeStatus::kDecodeDone; |
| 39 } |
| 40 state->InitializeRemainders(); |
| 41 return HandleStatus(state, state->StartDecodingStructureInPayload( |
| 42 &window_update_fields_, db)); |
| 43 } |
| 44 |
| 45 DecodeStatus WindowUpdatePayloadDecoder::ResumeDecodingPayload( |
| 46 FrameDecoderState* state, |
| 47 DecodeBuffer* db) { |
| 48 DVLOG(2) << "ResumeDecodingPayload: remaining_payload=" |
| 49 << state->remaining_payload() |
| 50 << "; db->Remaining=" << db->Remaining(); |
| 51 DCHECK_EQ(Http2FrameType::WINDOW_UPDATE, state->frame_header().type); |
| 52 DCHECK_LE(db->Remaining(), state->frame_header().payload_length); |
| 53 return HandleStatus(state, state->ResumeDecodingStructureInPayload( |
| 54 &window_update_fields_, db)); |
| 55 } |
| 56 |
| 57 DecodeStatus WindowUpdatePayloadDecoder::HandleStatus(FrameDecoderState* state, |
| 58 DecodeStatus status) { |
| 59 DVLOG(2) << "HandleStatus: status=" << status |
| 60 << "; remaining_payload=" << state->remaining_payload(); |
| 61 if (status == DecodeStatus::kDecodeDone) { |
| 62 if (state->remaining_payload() == 0) { |
| 63 state->listener()->OnWindowUpdate( |
| 64 state->frame_header(), window_update_fields_.window_size_increment); |
| 65 return DecodeStatus::kDecodeDone; |
| 66 } |
| 67 // Payload is too long. |
| 68 return state->ReportFrameSizeError(); |
| 69 } |
| 70 // Not done decoding the structure. Either we've got more payload to decode, |
| 71 // or we've run out because the payload is too short, in which case |
| 72 // OnFrameSizeError will have already been called. |
| 73 DCHECK( |
| 74 (status == DecodeStatus::kDecodeInProgress && |
| 75 state->remaining_payload() > 0) || |
| 76 (status == DecodeStatus::kDecodeError && state->remaining_payload() == 0)) |
| 77 << "\n status=" << status |
| 78 << "; remaining_payload=" << state->remaining_payload(); |
| 79 return status; |
| 80 } |
| 81 |
| 82 } // namespace net |
OLD | NEW |