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Unified Diff: net/http2/decoder/payload_decoders/window_update_payload_decoder.cc

Issue 2293613002: Add new HTTP/2 and HPACK decoder in net/http2/. (Closed)
Patch Set: Replace LOG(INFO) by VLOG(2) in DecodeBufferTest.SlowDecodeTestStruct so that trybots do not fail. Created 4 years ago
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Index: net/http2/decoder/payload_decoders/window_update_payload_decoder.cc
diff --git a/net/http2/decoder/payload_decoders/window_update_payload_decoder.cc b/net/http2/decoder/payload_decoders/window_update_payload_decoder.cc
new file mode 100644
index 0000000000000000000000000000000000000000..bc1e54ce1bb74c520ab540901833e506cb54bedf
--- /dev/null
+++ b/net/http2/decoder/payload_decoders/window_update_payload_decoder.cc
@@ -0,0 +1,82 @@
+// 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/window_update_payload_decoder.h"
+
+#include "base/logging.h"
+#include "net/http2/decoder/decode_buffer.h"
+#include "net/http2/decoder/decode_http2_structures.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 WindowUpdatePayloadDecoder::StartDecodingPayload(
+ FrameDecoderState* state,
+ DecodeBuffer* db) {
+ const Http2FrameHeader& frame_header = state->frame_header();
+ const uint32_t total_length = frame_header.payload_length;
+
+ DVLOG(2) << "WindowUpdatePayloadDecoder::StartDecodingPayload: "
+ << frame_header;
+
+ DCHECK_EQ(Http2FrameType::WINDOW_UPDATE, frame_header.type);
+ DCHECK_LE(db->Remaining(), total_length);
+
+ // WINDOW_UPDATE frames have no flags.
+ DCHECK_EQ(0, frame_header.flags);
+
+ // Special case for when the payload is the correct size and entirely in
+ // the buffer.
+ if (db->Remaining() == Http2WindowUpdateFields::EncodedSize() &&
+ total_length == Http2WindowUpdateFields::EncodedSize()) {
+ DoDecode(&window_update_fields_, db);
+ state->listener()->OnWindowUpdate(
+ frame_header, window_update_fields_.window_size_increment);
+ return DecodeStatus::kDecodeDone;
+ }
+ state->InitializeRemainders();
+ return HandleStatus(state, state->StartDecodingStructureInPayload(
+ &window_update_fields_, db));
+}
+
+DecodeStatus WindowUpdatePayloadDecoder::ResumeDecodingPayload(
+ FrameDecoderState* state,
+ DecodeBuffer* db) {
+ DVLOG(2) << "ResumeDecodingPayload: remaining_payload="
+ << state->remaining_payload()
+ << "; db->Remaining=" << db->Remaining();
+ DCHECK_EQ(Http2FrameType::WINDOW_UPDATE, state->frame_header().type);
+ DCHECK_LE(db->Remaining(), state->frame_header().payload_length);
+ return HandleStatus(state, state->ResumeDecodingStructureInPayload(
+ &window_update_fields_, db));
+}
+
+DecodeStatus WindowUpdatePayloadDecoder::HandleStatus(FrameDecoderState* state,
+ DecodeStatus status) {
+ DVLOG(2) << "HandleStatus: status=" << status
+ << "; remaining_payload=" << state->remaining_payload();
+ if (status == DecodeStatus::kDecodeDone) {
+ if (state->remaining_payload() == 0) {
+ state->listener()->OnWindowUpdate(
+ state->frame_header(), window_update_fields_.window_size_increment);
+ return DecodeStatus::kDecodeDone;
+ }
+ // Payload is too long.
+ return state->ReportFrameSizeError();
+ }
+ // 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();
+ return status;
+}
+
+} // namespace net

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