| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "quiche/http2/decoder/payload_decoders/priority_payload_decoder.h" |
| |
| #include "quiche/http2/decoder/decode_buffer.h" |
| #include "quiche/http2/decoder/http2_frame_decoder_listener.h" |
| #include "quiche/http2/http2_constants.h" |
| #include "quiche/http2/http2_structures.h" |
| #include "quiche/common/platform/api/quiche_logging.h" |
| |
| namespace http2 { |
| |
| DecodeStatus PriorityPayloadDecoder::StartDecodingPayload( |
| FrameDecoderState* state, DecodeBuffer* db) { |
| QUICHE_DVLOG(2) << "PriorityPayloadDecoder::StartDecodingPayload: " |
| << state->frame_header(); |
| QUICHE_DCHECK_EQ(Http2FrameType::PRIORITY, state->frame_header().type); |
| QUICHE_DCHECK_LE(db->Remaining(), state->frame_header().payload_length); |
| // PRIORITY frames have no flags. |
| QUICHE_DCHECK_EQ(0, state->frame_header().flags); |
| state->InitializeRemainders(); |
| return HandleStatus( |
| state, state->StartDecodingStructureInPayload(&priority_fields_, db)); |
| } |
| |
| DecodeStatus PriorityPayloadDecoder::ResumeDecodingPayload( |
| FrameDecoderState* state, DecodeBuffer* db) { |
| QUICHE_DVLOG(2) << "PriorityPayloadDecoder::ResumeDecodingPayload" |
| << " remaining_payload=" << state->remaining_payload() |
| << " db->Remaining=" << db->Remaining(); |
| QUICHE_DCHECK_EQ(Http2FrameType::PRIORITY, state->frame_header().type); |
| QUICHE_DCHECK_LE(db->Remaining(), state->frame_header().payload_length); |
| return HandleStatus( |
| state, state->ResumeDecodingStructureInPayload(&priority_fields_, db)); |
| } |
| |
| DecodeStatus PriorityPayloadDecoder::HandleStatus(FrameDecoderState* state, |
| DecodeStatus status) { |
| if (status == DecodeStatus::kDecodeDone) { |
| if (state->remaining_payload() == 0) { |
| state->listener()->OnPriorityFrame(state->frame_header(), |
| priority_fields_); |
| return DecodeStatus::kDecodeDone; |
| } |
| // Payload is too long. |
| return state->ReportFrameSizeError(); |
| } |
| // Not done decoding the structure. Either we've got more payload to decode, |
| // or we've run out because the payload is too short, in which case |
| // OnFrameSizeError will have already been called. |
| QUICHE_DCHECK( |
| (status == DecodeStatus::kDecodeInProgress && |
| state->remaining_payload() > 0) || |
| (status == DecodeStatus::kDecodeError && state->remaining_payload() == 0)) |
| << "\n status=" << status |
| << "; remaining_payload=" << state->remaining_payload(); |
| return status; |
| } |
| |
| } // namespace http2 |