Index: net/http2/decoder/payload_decoders/settings_payload_decoder.cc |
diff --git a/net/http2/decoder/payload_decoders/settings_payload_decoder.cc b/net/http2/decoder/payload_decoders/settings_payload_decoder.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..f8cc52cb48605086f33b2ed13658f207148cc488 |
--- /dev/null |
+++ b/net/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/http2/decoder/payload_decoders/settings_payload_decoder.h" |
+ |
+#include "base/logging.h" |
+#include "net/http2/decoder/decode_buffer.h" |
+#include "net/http2/decoder/http2_frame_decoder_listener.h" |
+#include "net/http2/http2_constants.h" |
+#include "net/http2/http2_structures.h" |
+ |
+namespace net { |
+ |
+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::FLAG_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 net |