mirror of
https://github.com/klzgrad/naiveproxy.git
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98 lines
3.7 KiB
C++
98 lines
3.7 KiB
C++
// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/http2/decoder/payload_decoders/settings_payload_decoder.h"
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#include "base/logging.h"
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#include "net/http2/decoder/decode_buffer.h"
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#include "net/http2/decoder/http2_frame_decoder_listener.h"
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#include "net/http2/http2_constants.h"
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#include "net/http2/http2_structures.h"
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namespace net {
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DecodeStatus SettingsPayloadDecoder::StartDecodingPayload(
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FrameDecoderState* state,
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DecodeBuffer* db) {
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const Http2FrameHeader& frame_header = state->frame_header();
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const uint32_t total_length = frame_header.payload_length;
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DVLOG(2) << "SettingsPayloadDecoder::StartDecodingPayload: " << frame_header;
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DCHECK_EQ(Http2FrameType::SETTINGS, frame_header.type);
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DCHECK_LE(db->Remaining(), total_length);
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DCHECK_EQ(0, frame_header.flags & ~(Http2FrameFlag::ACK));
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if (frame_header.IsAck()) {
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if (total_length == 0) {
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state->listener()->OnSettingsAck(frame_header);
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return DecodeStatus::kDecodeDone;
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} else {
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state->InitializeRemainders();
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return state->ReportFrameSizeError();
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}
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} else {
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state->InitializeRemainders();
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state->listener()->OnSettingsStart(frame_header);
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return StartDecodingSettings(state, db);
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}
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}
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DecodeStatus SettingsPayloadDecoder::ResumeDecodingPayload(
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FrameDecoderState* state,
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DecodeBuffer* db) {
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DVLOG(2) << "SettingsPayloadDecoder::ResumeDecodingPayload"
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<< " remaining_payload=" << state->remaining_payload()
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<< " db->Remaining=" << db->Remaining();
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DCHECK_EQ(Http2FrameType::SETTINGS, state->frame_header().type);
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DCHECK_LE(db->Remaining(), state->frame_header().payload_length);
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DecodeStatus status =
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state->ResumeDecodingStructureInPayload(&setting_fields_, db);
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if (status == DecodeStatus::kDecodeDone) {
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state->listener()->OnSetting(setting_fields_);
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return StartDecodingSettings(state, db);
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}
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return HandleNotDone(state, db, status);
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}
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DecodeStatus SettingsPayloadDecoder::StartDecodingSettings(
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FrameDecoderState* state,
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DecodeBuffer* db) {
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DVLOG(2) << "SettingsPayloadDecoder::StartDecodingSettings"
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<< " remaining_payload=" << state->remaining_payload()
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<< " db->Remaining=" << db->Remaining();
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while (state->remaining_payload() > 0) {
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DecodeStatus status =
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state->StartDecodingStructureInPayload(&setting_fields_, db);
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if (status == DecodeStatus::kDecodeDone) {
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state->listener()->OnSetting(setting_fields_);
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continue;
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}
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return HandleNotDone(state, db, status);
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}
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DVLOG(2) << "LEAVING SettingsPayloadDecoder::StartDecodingSettings"
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<< "\n\tdb->Remaining=" << db->Remaining()
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<< "\n\t remaining_payload=" << state->remaining_payload();
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state->listener()->OnSettingsEnd();
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return DecodeStatus::kDecodeDone;
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}
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DecodeStatus SettingsPayloadDecoder::HandleNotDone(FrameDecoderState* state,
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DecodeBuffer* db,
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DecodeStatus status) {
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// Not done decoding the structure. Either we've got more payload to decode,
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// or we've run out because the payload is too short, in which case
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// OnFrameSizeError will have already been called.
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DCHECK(
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(status == DecodeStatus::kDecodeInProgress &&
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state->remaining_payload() > 0) ||
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(status == DecodeStatus::kDecodeError && state->remaining_payload() == 0))
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<< "\n status=" << status
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<< "; remaining_payload=" << state->remaining_payload()
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<< "; db->Remaining=" << db->Remaining();
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return status;
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}
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} // namespace net
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