Project import generated by Copybara.
PiperOrigin-RevId: 224614037
Change-Id: I14e53449d4aeccb328f86828c76b5f09dea0d4b8
diff --git a/http2/decoder/payload_decoders/settings_payload_decoder.cc b/http2/decoder/payload_decoders/settings_payload_decoder.cc
new file mode 100644
index 0000000..bf29c4d
--- /dev/null
+++ b/http2/decoder/payload_decoders/settings_payload_decoder.cc
@@ -0,0 +1,97 @@
+// 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 "net/third_party/quiche/src/http2/decoder/payload_decoders/settings_payload_decoder.h"
+
+#include "base/logging.h"
+#include "net/third_party/quiche/src/http2/decoder/decode_buffer.h"
+#include "net/third_party/quiche/src/http2/decoder/http2_frame_decoder_listener.h"
+#include "net/third_party/quiche/src/http2/http2_constants.h"
+#include "net/third_party/quiche/src/http2/http2_structures.h"
+
+namespace http2 {
+
+DecodeStatus SettingsPayloadDecoder::StartDecodingPayload(
+ FrameDecoderState* state,
+ DecodeBuffer* db) {
+ const Http2FrameHeader& frame_header = state->frame_header();
+ const uint32_t total_length = frame_header.payload_length;
+
+ DVLOG(2) << "SettingsPayloadDecoder::StartDecodingPayload: " << frame_header;
+ DCHECK_EQ(Http2FrameType::SETTINGS, frame_header.type);
+ DCHECK_LE(db->Remaining(), total_length);
+ DCHECK_EQ(0, frame_header.flags & ~(Http2FrameFlag::ACK));
+
+ if (frame_header.IsAck()) {
+ if (total_length == 0) {
+ state->listener()->OnSettingsAck(frame_header);
+ return DecodeStatus::kDecodeDone;
+ } else {
+ state->InitializeRemainders();
+ return state->ReportFrameSizeError();
+ }
+ } else {
+ state->InitializeRemainders();
+ state->listener()->OnSettingsStart(frame_header);
+ return StartDecodingSettings(state, db);
+ }
+}
+
+DecodeStatus SettingsPayloadDecoder::ResumeDecodingPayload(
+ FrameDecoderState* state,
+ DecodeBuffer* db) {
+ DVLOG(2) << "SettingsPayloadDecoder::ResumeDecodingPayload"
+ << " remaining_payload=" << state->remaining_payload()
+ << " db->Remaining=" << db->Remaining();
+ DCHECK_EQ(Http2FrameType::SETTINGS, state->frame_header().type);
+ DCHECK_LE(db->Remaining(), state->frame_header().payload_length);
+
+ DecodeStatus status =
+ state->ResumeDecodingStructureInPayload(&setting_fields_, db);
+ if (status == DecodeStatus::kDecodeDone) {
+ state->listener()->OnSetting(setting_fields_);
+ return StartDecodingSettings(state, db);
+ }
+ return HandleNotDone(state, db, status);
+}
+
+DecodeStatus SettingsPayloadDecoder::StartDecodingSettings(
+ FrameDecoderState* state,
+ DecodeBuffer* db) {
+ DVLOG(2) << "SettingsPayloadDecoder::StartDecodingSettings"
+ << " remaining_payload=" << state->remaining_payload()
+ << " db->Remaining=" << db->Remaining();
+ while (state->remaining_payload() > 0) {
+ DecodeStatus status =
+ state->StartDecodingStructureInPayload(&setting_fields_, db);
+ if (status == DecodeStatus::kDecodeDone) {
+ state->listener()->OnSetting(setting_fields_);
+ continue;
+ }
+ return HandleNotDone(state, db, status);
+ }
+ DVLOG(2) << "LEAVING SettingsPayloadDecoder::StartDecodingSettings"
+ << "\n\tdb->Remaining=" << db->Remaining()
+ << "\n\t remaining_payload=" << state->remaining_payload();
+ state->listener()->OnSettingsEnd();
+ return DecodeStatus::kDecodeDone;
+}
+
+DecodeStatus SettingsPayloadDecoder::HandleNotDone(FrameDecoderState* state,
+ DecodeBuffer* db,
+ DecodeStatus status) {
+ // 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.
+ DCHECK(
+ (status == DecodeStatus::kDecodeInProgress &&
+ state->remaining_payload() > 0) ||
+ (status == DecodeStatus::kDecodeError && state->remaining_payload() == 0))
+ << "\n status=" << status
+ << "; remaining_payload=" << state->remaining_payload()
+ << "; db->Remaining=" << db->Remaining();
+ return status;
+}
+
+} // namespace http2
