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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.
#ifndef QUICHE_HTTP2_DECODER_PAYLOAD_DECODERS_PUSH_PROMISE_PAYLOAD_DECODER_H_
#define QUICHE_HTTP2_DECODER_PAYLOAD_DECODERS_PUSH_PROMISE_PAYLOAD_DECODER_H_
// Decodes the payload of a PUSH_PROMISE frame.
#include "quiche/http2/decoder/decode_buffer.h"
#include "quiche/http2/decoder/decode_status.h"
#include "quiche/http2/decoder/frame_decoder_state.h"
#include "quiche/http2/http2_structures.h"
#include "quiche/common/platform/api/quiche_export.h"
namespace http2 {
namespace test {
class PushPromisePayloadDecoderPeer;
} // namespace test
class QUICHE_EXPORT PushPromisePayloadDecoder {
public:
// States during decoding of a PUSH_PROMISE frame.
enum class PayloadState {
// The frame is padded and we need to read the PAD_LENGTH field (1 byte).
kReadPadLength,
// Ready to start decoding the fixed size fields of the PUSH_PROMISE
// frame into push_promise_fields_.
kStartDecodingPushPromiseFields,
// The decoder has already called OnPushPromiseStart, and is now reporting
// the HPACK block fragment to the listener's OnHpackFragment method.
kReadPayload,
// The decoder has finished with the HPACK block fragment, and is now
// ready to skip the trailing padding, if the frame has any.
kSkipPadding,
// The fixed size fields weren't all available when the decoder first tried
// to decode them (state kStartDecodingPushPromiseFields); this state
// resumes the decoding when ResumeDecodingPayload is called later.
kResumeDecodingPushPromiseFields,
};
// Starts the decoding of a PUSH_PROMISE 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 PUSH_PROMISE frame's payload that has been split across
// decode buffers.
DecodeStatus ResumeDecodingPayload(FrameDecoderState* state,
DecodeBuffer* db);
private:
friend class test::PushPromisePayloadDecoderPeer;
void ReportPushPromise(FrameDecoderState* state);
PayloadState payload_state_;
Http2PushPromiseFields push_promise_fields_;
};
} // namespace http2
#endif // QUICHE_HTTP2_DECODER_PAYLOAD_DECODERS_PUSH_PROMISE_PAYLOAD_DECODER_H_