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// 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.
// Decodes the payload of a GOAWAY frame.
// TODO(jamessynge): Sweep through all payload decoders, changing the names of
// the PayloadState enums so that they are really states, and not actions.
#include "http2/decoder/decode_buffer.h"
#include "http2/decoder/decode_status.h"
#include "http2/decoder/frame_decoder_state.h"
#include "http2/http2_structures.h"
#include "common/platform/api/quiche_export.h"
namespace http2 {
namespace test {
class GoAwayPayloadDecoderPeer;
} // namespace test
class QUICHE_EXPORT_PRIVATE GoAwayPayloadDecoder {
// States during decoding of a GOAWAY frame.
enum class PayloadState {
// At the start of the GOAWAY frame payload, ready to start decoding the
// fixed size fields into goaway_fields_.
// Handle the DecodeStatus returned from starting or resuming the
// decoding of Http2GoAwayFields into goaway_fields_. If complete,
// calls OnGoAwayStart.
// Report the Opaque Data portion of the payload to the listener's
// OnGoAwayOpaqueData method, and call OnGoAwayEnd when the end of the
// payload is reached.
// The fixed size fields weren't all available when the decoder first
// tried to decode them (state kStartDecodingFixedFields); this state
// resumes the decoding when ResumeDecodingPayload is called later.
// Starts the decoding of a GOAWAY frame's payload, and completes it if
// the entire payload is in the provided decode buffer.
DecodeStatus StartDecodingPayload(FrameDecoderState* state, DecodeBuffer* db);
// Resumes decoding a GOAWAY frame's payload that has been split across
// decode buffers.
DecodeStatus ResumeDecodingPayload(FrameDecoderState* state,
DecodeBuffer* db);
friend class test::GoAwayPayloadDecoderPeer;
Http2GoAwayFields goaway_fields_;
PayloadState payload_state_;
} // namespace http2