Instead of immediate data flush, always try to bundle QPACK decoder data opportunistically.
This change is based on Bence's cl/553795731.
Protected by FLAGS_quic_restart_flag_quic_opport_bundle_qpack_decoder_data.
PiperOrigin-RevId: 557313748
diff --git a/quiche/quic/core/http/end_to_end_test.cc b/quiche/quic/core/http/end_to_end_test.cc
index 8f0e186..9644650 100644
--- a/quiche/quic/core/http/end_to_end_test.cc
+++ b/quiche/quic/core/http/end_to_end_test.cc
@@ -2856,9 +2856,15 @@
client_connection->GetStats().packets_sent;
if (version_.UsesHttp3()) {
- // Make sure 2 packets were sent, one for QPACK instructions, another for
- // RESET_STREAM and STOP_SENDING.
- EXPECT_EQ(packets_sent_before + 2, packets_sent_now);
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ // QPACK decoder instructions and RESET_STREAM and STOP_SENDING frames are
+ // sent in a single packet.
+ EXPECT_EQ(packets_sent_before + 1, packets_sent_now);
+ } else {
+ // Make sure 2 packets were sent, one for QPACK instructions, another for
+ // RESET_STREAM and STOP_SENDING.
+ EXPECT_EQ(packets_sent_before + 2, packets_sent_now);
+ }
}
// WaitForEvents waits 50ms and returns true if there are outstanding
@@ -3144,7 +3150,11 @@
// received by the server.
QuicConnection* server_connection = GetServerConnection();
EXPECT_FALSE(server_connection->HasPendingPathValidation());
- EXPECT_EQ(3u, server_connection->GetStats().num_validated_peer_migration);
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ EXPECT_EQ(4u, server_connection->GetStats().num_validated_peer_migration);
+ } else {
+ EXPECT_EQ(3u, server_connection->GetStats().num_validated_peer_migration);
+ }
EXPECT_EQ(server_cid3, server_connection->connection_id());
EXPECT_EQ(client_cid3, server_connection->client_connection_id());
EXPECT_TRUE(QuicConnectionPeer::GetServerConnectionIdOnAlternativePath(
diff --git a/quiche/quic/core/http/quic_spdy_session.cc b/quiche/quic/core/http/quic_spdy_session.cc
index ee6d6d1..0e92248 100644
--- a/quiche/quic/core/http/quic_spdy_session.cc
+++ b/quiche/quic/core/http/quic_spdy_session.cc
@@ -24,6 +24,7 @@
#include "quiche/quic/core/http/quic_spdy_stream.h"
#include "quiche/quic/core/http/web_transport_http3.h"
#include "quiche/quic/core/quic_error_codes.h"
+#include "quiche/quic/core/quic_session.h"
#include "quiche/quic/core/quic_types.h"
#include "quiche/quic/core/quic_utils.h"
#include "quiche/quic/core/quic_versions.h"
@@ -857,6 +858,16 @@
send_control_stream_->MaybeSendSettingsFrame();
}
+bool QuicSpdySession::CheckStreamWriteBlocked(QuicStream* stream) const {
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data) &&
+ qpack_decoder_send_stream_ != nullptr &&
+ stream->id() == qpack_decoder_send_stream_->id()) {
+ // Decoder data is always bundled opportunistically.
+ return true;
+ }
+ return QuicSession::CheckStreamWriteBlocked(stream);
+}
+
QpackEncoder* QuicSpdySession::qpack_encoder() {
QUICHE_DCHECK(VersionUsesHttp3(transport_version()));
@@ -1637,6 +1648,12 @@
last_sent_http3_goaway_id_ = stream_id;
}
+void QuicSpdySession::MaybeBundleOpportunistically() {
+ if (qpack_decoder_ != nullptr) {
+ qpack_decoder_->FlushDecoderStream();
+ }
+}
+
void QuicSpdySession::OnCanCreateNewOutgoingStream(bool unidirectional) {
if (unidirectional && VersionUsesHttp3(transport_version())) {
MaybeInitializeHttp3UnidirectionalStreams();
diff --git a/quiche/quic/core/http/quic_spdy_session.h b/quiche/quic/core/http/quic_spdy_session.h
index 98e4aba..ddd0e5f 100644
--- a/quiche/quic/core/http/quic_spdy_session.h
+++ b/quiche/quic/core/http/quic_spdy_session.h
@@ -541,8 +541,9 @@
// Initializes HTTP/3 unidirectional streams if not yet initialzed.
virtual void MaybeInitializeHttp3UnidirectionalStreams();
- // QuicConnectionVisitorInterface method.
+ // QuicConnectionVisitorInterface methods.
void BeforeConnectionCloseSent() override;
+ void MaybeBundleOpportunistically() override;
// Called whenever a datagram is dequeued or dropped from datagram_queue().
virtual void OnDatagramProcessed(absl::optional<MessageStatus> status);
@@ -557,6 +558,10 @@
// available.
void SendInitialData();
+ // Override to skip checking for qpack_decoder_send_stream_ given decoder data
+ // is always bundled opportunistically.
+ bool CheckStreamWriteBlocked(QuicStream* stream) const override;
+
private:
friend class test::QuicSpdySessionPeer;
diff --git a/quiche/quic/core/http/quic_spdy_session_test.cc b/quiche/quic/core/http/quic_spdy_session_test.cc
index 749ac81..0ccb217 100644
--- a/quiche/quic/core/http/quic_spdy_session_test.cc
+++ b/quiche/quic/core/http/quic_spdy_session_test.cc
@@ -1279,7 +1279,8 @@
// In HTTP/3, Qpack stream will send data on stream reset and cause packet to
// be flushed.
- if (VersionUsesHttp3(transport_version())) {
+ if (VersionUsesHttp3(transport_version()) &&
+ !GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
EXPECT_CALL(*writer_, WritePacket(_, _, _, _, _, _))
.WillOnce(Return(WriteResult(WRITE_STATUS_OK, 0)));
}
@@ -1514,7 +1515,7 @@
// the STOP_SENDING, so set up the EXPECT there.
EXPECT_CALL(*connection_, OnStreamReset(stream->id(), _));
EXPECT_CALL(*connection_, SendControlFrame(_));
- } else {
+ } else if (!GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
EXPECT_CALL(*writer_, WritePacket(_, _, _, _, _, _))
.WillOnce(Return(WriteResult(WRITE_STATUS_OK, 0)));
}
diff --git a/quiche/quic/core/http/quic_spdy_stream_test.cc b/quiche/quic/core/http/quic_spdy_stream_test.cc
index c9e4704..5dd7e89 100644
--- a/quiche/quic/core/http/quic_spdy_stream_test.cc
+++ b/quiche/quic/core/http/quic_spdy_stream_test.cc
@@ -586,12 +586,14 @@
stream_->id(),
QuicResetStreamError::FromInternal(QUIC_HEADERS_TOO_LARGE), 0));
- auto qpack_decoder_stream =
- QuicSpdySessionPeer::GetQpackDecoderSendStream(session_.get());
- // Stream type and stream cancellation.
- EXPECT_CALL(*session_,
- WritevData(qpack_decoder_stream->id(), _, _, NO_FIN, _, _))
- .Times(2);
+ if (!GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ auto qpack_decoder_stream =
+ QuicSpdySessionPeer::GetQpackDecoderSendStream(session_.get());
+ // Stream type and stream cancellation.
+ EXPECT_CALL(*session_,
+ WritevData(qpack_decoder_stream->id(), _, _, NO_FIN, _, _))
+ .Times(2);
+ }
stream_->OnStreamFrame(frame);
EXPECT_THAT(stream_->stream_error(), IsStreamError(QUIC_HEADERS_TOO_LARGE));
@@ -2250,14 +2252,16 @@
std::string headers = HeadersFrame(encoded_headers);
EXPECT_CALL(debug_visitor,
OnHeadersFrameReceived(stream_->id(), encoded_headers.length()));
- // Decoder stream type.
- EXPECT_CALL(*session_,
- WritevData(decoder_send_stream->id(), /* write_length = */ 1,
- /* offset = */ 0, _, _, _));
- // Header acknowledgement.
- EXPECT_CALL(*session_,
- WritevData(decoder_send_stream->id(), /* write_length = */ 1,
- /* offset = */ 1, _, _, _));
+ if (!GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ // Decoder stream type.
+ EXPECT_CALL(*session_,
+ WritevData(decoder_send_stream->id(), /* write_length = */ 1,
+ /* offset = */ 0, _, _, _));
+ // Header acknowledgement.
+ EXPECT_CALL(*session_,
+ WritevData(decoder_send_stream->id(), /* write_length = */ 1,
+ /* offset = */ 1, _, _, _));
+ }
EXPECT_CALL(debug_visitor, OnHeadersDecoded(stream_->id(), _));
stream_->OnStreamFrame(QuicStreamFrame(stream_->id(), false, 0, headers));
@@ -2285,7 +2289,10 @@
EXPECT_CALL(debug_visitor,
OnHeadersFrameReceived(stream_->id(), encoded_trailers.length()));
// Header acknowledgement.
- EXPECT_CALL(*session_, WritevData(decoder_send_stream->id(), _, _, _, _, _));
+ if (!GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ EXPECT_CALL(*session_,
+ WritevData(decoder_send_stream->id(), _, _, _, _, _));
+ }
EXPECT_CALL(debug_visitor, OnHeadersDecoded(stream_->id(), _));
stream_->OnStreamFrame(QuicStreamFrame(stream_->id(), true, /* offset = */
headers.length() + data.length(),
@@ -2324,14 +2331,16 @@
auto decoder_send_stream =
QuicSpdySessionPeer::GetQpackDecoderSendStream(session_.get());
- // Decoder stream type.
- EXPECT_CALL(*session_,
- WritevData(decoder_send_stream->id(), /* write_length = */ 1,
- /* offset = */ 0, _, _, _));
- // Header acknowledgement.
- EXPECT_CALL(*session_,
- WritevData(decoder_send_stream->id(), /* write_length = */ 1,
- /* offset = */ 1, _, _, _));
+ if (!GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ // Decoder stream type.
+ EXPECT_CALL(*session_,
+ WritevData(decoder_send_stream->id(), /* write_length = */ 1,
+ /* offset = */ 0, _, _, _));
+ // Header acknowledgement.
+ EXPECT_CALL(*session_,
+ WritevData(decoder_send_stream->id(), /* write_length = */ 1,
+ /* offset = */ 1, _, _, _));
+ }
EXPECT_CALL(debug_visitor, OnHeadersDecoded(stream_->id(), _));
// Deliver dynamic table entry to decoder.
session_->qpack_decoder()->OnInsertWithoutNameReference("foo", "bar");
@@ -2361,8 +2370,11 @@
// Decoding is blocked because dynamic table entry has not been received yet.
EXPECT_FALSE(stream_->trailers_decompressed());
- // Header acknowledgement.
- EXPECT_CALL(*session_, WritevData(decoder_send_stream->id(), _, _, _, _, _));
+ if (!GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ // Header acknowledgement.
+ EXPECT_CALL(*session_,
+ WritevData(decoder_send_stream->id(), _, _, _, _, _));
+ }
EXPECT_CALL(debug_visitor, OnHeadersDecoded(stream_->id(), _));
// Deliver second dynamic table entry to decoder.
session_->qpack_decoder()->OnInsertWithoutNameReference("trailing", "foobar");
@@ -2453,14 +2465,16 @@
auto decoder_send_stream =
QuicSpdySessionPeer::GetQpackDecoderSendStream(session_.get());
- // Decoder stream type.
- EXPECT_CALL(*session_,
- WritevData(decoder_send_stream->id(), /* write_length = */ 1,
- /* offset = */ 0, _, _, _));
- // Header acknowledgement.
- EXPECT_CALL(*session_,
- WritevData(decoder_send_stream->id(), /* write_length = */ 1,
- /* offset = */ 1, _, _, _));
+ if (!GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ // Decoder stream type.
+ EXPECT_CALL(*session_,
+ WritevData(decoder_send_stream->id(), /* write_length = */ 1,
+ /* offset = */ 0, _, _, _));
+ // Header acknowledgement.
+ EXPECT_CALL(*session_,
+ WritevData(decoder_send_stream->id(), /* write_length = */ 1,
+ /* offset = */ 1, _, _, _));
+ }
// Deliver dynamic table entry to decoder.
session_->qpack_decoder()->OnInsertWithoutNameReference("foo", "bar");
EXPECT_TRUE(stream_->headers_decompressed());
@@ -2522,15 +2536,17 @@
// Decoding is blocked because dynamic table entry has not been received yet.
EXPECT_FALSE(stream_->headers_decompressed());
- // Decoder stream type and stream cancellation instruction.
- auto decoder_send_stream =
- QuicSpdySessionPeer::GetQpackDecoderSendStream(session_.get());
- EXPECT_CALL(*session_,
- WritevData(decoder_send_stream->id(), /* write_length = */ 1,
- /* offset = */ 0, _, _, _));
- EXPECT_CALL(*session_,
- WritevData(decoder_send_stream->id(), /* write_length = */ 1,
- /* offset = */ 1, _, _, _));
+ if (!GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ // Decoder stream type and stream cancellation instruction.
+ auto decoder_send_stream =
+ QuicSpdySessionPeer::GetQpackDecoderSendStream(session_.get());
+ EXPECT_CALL(*session_,
+ WritevData(decoder_send_stream->id(), /* write_length = */ 1,
+ /* offset = */ 0, _, _, _));
+ EXPECT_CALL(*session_,
+ WritevData(decoder_send_stream->id(), /* write_length = */ 1,
+ /* offset = */ 1, _, _, _));
+ }
// Reset stream by this endpoint, for example, due to stream cancellation.
EXPECT_CALL(*session_, MaybeSendStopSendingFrame(
@@ -2570,15 +2586,17 @@
// Decoding is blocked because dynamic table entry has not been received yet.
EXPECT_FALSE(stream_->headers_decompressed());
- // Decoder stream type and stream cancellation instruction.
- auto decoder_send_stream =
- QuicSpdySessionPeer::GetQpackDecoderSendStream(session_.get());
- EXPECT_CALL(*session_,
- WritevData(decoder_send_stream->id(), /* write_length = */ 1,
- /* offset = */ 0, _, _, _));
- EXPECT_CALL(*session_,
- WritevData(decoder_send_stream->id(), /* write_length = */ 1,
- /* offset = */ 1, _, _, _));
+ if (!GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ // Decoder stream type and stream cancellation instruction.
+ auto decoder_send_stream =
+ QuicSpdySessionPeer::GetQpackDecoderSendStream(session_.get());
+ EXPECT_CALL(*session_,
+ WritevData(decoder_send_stream->id(), /* write_length = */ 1,
+ /* offset = */ 0, _, _, _));
+ EXPECT_CALL(*session_,
+ WritevData(decoder_send_stream->id(), /* write_length = */ 1,
+ /* offset = */ 1, _, _, _));
+ }
// OnStreamReset() is called when RESET_STREAM frame is received from peer.
// This aborts header decompression.
@@ -2961,14 +2979,16 @@
auto qpack_decoder_stream =
QuicSpdySessionPeer::GetQpackDecoderSendStream(session_.get());
- // Stream type.
- EXPECT_CALL(*session_,
- WritevData(qpack_decoder_stream->id(), /* write_length = */ 1,
- /* offset = */ 0, _, _, _));
- // Stream cancellation.
- EXPECT_CALL(*session_,
- WritevData(qpack_decoder_stream->id(), /* write_length = */ 1,
- /* offset = */ 1, _, _, _));
+ if (!GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ // Stream type.
+ EXPECT_CALL(*session_,
+ WritevData(qpack_decoder_stream->id(), /* write_length = */ 1,
+ /* offset = */ 0, _, _, _));
+ // Stream cancellation.
+ EXPECT_CALL(*session_,
+ WritevData(qpack_decoder_stream->id(), /* write_length = */ 1,
+ /* offset = */ 1, _, _, _));
+ }
EXPECT_CALL(*session_, MaybeSendStopSendingFrame(
stream_->id(), QuicResetStreamError::FromInternal(
QUIC_STREAM_CANCELLED)));
@@ -2992,14 +3012,16 @@
auto qpack_decoder_stream =
QuicSpdySessionPeer::GetQpackDecoderSendStream(session_.get());
- // Stream type.
- EXPECT_CALL(*session_,
- WritevData(qpack_decoder_stream->id(), /* write_length = */ 1,
- /* offset = */ 0, _, _, _));
- // Stream cancellation.
- EXPECT_CALL(*session_,
- WritevData(qpack_decoder_stream->id(), /* write_length = */ 1,
- /* offset = */ 1, _, _, _));
+ if (!GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ // Stream type.
+ EXPECT_CALL(*session_,
+ WritevData(qpack_decoder_stream->id(), /* write_length = */ 1,
+ /* offset = */ 0, _, _, _));
+ // Stream cancellation.
+ EXPECT_CALL(*session_,
+ WritevData(qpack_decoder_stream->id(), /* write_length = */ 1,
+ /* offset = */ 1, _, _, _));
+ }
stream_->OnStreamReset(QuicRstStreamFrame(
kInvalidControlFrameId, stream_->id(), QUIC_STREAM_CANCELLED, 0));
@@ -3382,13 +3404,15 @@
QuicStreamFrame frame(stream_->id(), /* fin = */ false, 0, data_frame);
stream_->OnStreamFrame(frame);
- // As a result of resetting the stream, stream type and stream cancellation
- // are sent on the QPACK decoder stream.
- auto qpack_decoder_stream =
- QuicSpdySessionPeer::GetQpackDecoderSendStream(session_.get());
- EXPECT_CALL(*session_,
- WritevData(qpack_decoder_stream->id(), _, _, NO_FIN, _, _))
- .Times(2);
+ if (!GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ // As a result of resetting the stream, stream type and stream cancellation
+ // are sent on the QPACK decoder stream.
+ auto qpack_decoder_stream =
+ QuicSpdySessionPeer::GetQpackDecoderSendStream(session_.get());
+ EXPECT_CALL(*session_,
+ WritevData(qpack_decoder_stream->id(), _, _, NO_FIN, _, _))
+ .Times(2);
+ }
stream_->OnStreamReset(QuicRstStreamFrame(
kInvalidControlFrameId, stream_->id(), QUIC_STREAM_NO_ERROR, 0));
diff --git a/quiche/quic/core/qpack/qpack_decoded_headers_accumulator_test.cc b/quiche/quic/core/qpack/qpack_decoded_headers_accumulator_test.cc
index e4847c1..86a8564 100644
--- a/quiche/quic/core/qpack/qpack_decoded_headers_accumulator_test.cc
+++ b/quiche/quic/core/qpack/qpack_decoded_headers_accumulator_test.cc
@@ -175,6 +175,9 @@
EXPECT_CALL(visitor_, OnHeadersDecoded(_, true));
qpack_decoder_.OnInsertWithoutNameReference("foo", "bar");
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ qpack_decoder_.FlushDecoderStream();
+ }
}
TEST_F(QpackDecodedHeadersAccumulatorTest, BlockedDecoding) {
@@ -198,6 +201,9 @@
EXPECT_EQ(strlen("foo") + strlen("bar"),
header_list.uncompressed_header_bytes());
EXPECT_EQ(encoded_data.size(), header_list.compressed_header_bytes());
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ qpack_decoder_.FlushDecoderStream();
+ }
}
TEST_F(QpackDecodedHeadersAccumulatorTest,
@@ -221,6 +227,9 @@
accumulator_.EndHeaderBlock();
EXPECT_THAT(header_list, ElementsAre(Pair("foo", "bar"), Pair("foo", "bar")));
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ qpack_decoder_.FlushDecoderStream();
+ }
}
// Regression test for https://crbug.com/1024263.
diff --git a/quiche/quic/core/qpack/qpack_decoder.cc b/quiche/quic/core/qpack/qpack_decoder.cc
index 0569850..7a798ee 100644
--- a/quiche/quic/core/qpack/qpack_decoder.cc
+++ b/quiche/quic/core/qpack/qpack_decoder.cc
@@ -31,7 +31,9 @@
void QpackDecoder::OnStreamReset(QuicStreamId stream_id) {
if (header_table_.maximum_dynamic_table_capacity() > 0) {
decoder_stream_sender_.SendStreamCancellation(stream_id);
- decoder_stream_sender_.Flush();
+ if (!GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ decoder_stream_sender_.Flush();
+ }
}
}
@@ -66,7 +68,9 @@
known_received_count_ = header_table_.inserted_entry_count();
}
- decoder_stream_sender_.Flush();
+ if (!GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ decoder_stream_sender_.Flush();
+ }
}
void QpackDecoder::OnInsertWithNameReference(bool is_static,
@@ -167,4 +171,6 @@
&header_table_, handler);
}
+void QpackDecoder::FlushDecoderStream() { decoder_stream_sender_.Flush(); }
+
} // namespace quic
diff --git a/quiche/quic/core/qpack/qpack_decoder.h b/quiche/quic/core/qpack/qpack_decoder.h
index 9474378..1d12068 100644
--- a/quiche/quic/core/qpack/qpack_decoder.h
+++ b/quiche/quic/core/qpack/qpack_decoder.h
@@ -106,6 +106,9 @@
return header_table_.dynamic_table_entry_referenced();
}
+ // Flush buffered data on the decoder stream.
+ void FlushDecoderStream();
+
private:
EncoderStreamErrorDelegate* const encoder_stream_error_delegate_;
QpackEncoderStreamReceiver encoder_stream_receiver_;
diff --git a/quiche/quic/core/qpack/qpack_decoder_stream_sender.cc b/quiche/quic/core/qpack/qpack_decoder_stream_sender.cc
index cc48587..879f21b 100644
--- a/quiche/quic/core/qpack/qpack_decoder_stream_sender.cc
+++ b/quiche/quic/core/qpack/qpack_decoder_stream_sender.cc
@@ -7,9 +7,11 @@
#include <cstddef>
#include <limits>
#include <string>
+#include <utility>
#include "absl/strings/string_view.h"
#include "quiche/quic/core/qpack/qpack_instructions.h"
+#include "quiche/quic/platform/api/quic_flag_utils.h"
#include "quiche/quic/platform/api/quic_logging.h"
namespace quic {
@@ -33,10 +35,18 @@
}
void QpackDecoderStreamSender::Flush() {
- if (buffer_.empty()) {
+ if (buffer_.empty() || delegate_ == nullptr) {
return;
}
-
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ QUIC_RESTART_FLAG_COUNT_N(quic_opport_bundle_qpack_decoder_data, 3, 3);
+ // Swap buffer_ before calling WriteStreamData, which might result in a
+ // reentrant call to `Flush()`.
+ std::string copy;
+ std::swap(copy, buffer_);
+ delegate_->WriteStreamData(copy);
+ return;
+ }
delegate_->WriteStreamData(buffer_);
buffer_.clear();
}
diff --git a/quiche/quic/core/qpack/qpack_decoder_test.cc b/quiche/quic/core/qpack/qpack_decoder_test.cc
index 5cfd960..4415871 100644
--- a/quiche/quic/core/qpack/qpack_decoder_test.cc
+++ b/quiche/quic/core/qpack/qpack_decoder_test.cc
@@ -63,6 +63,8 @@
return qpack_decoder_.CreateProgressiveDecoder(stream_id, &handler_);
}
+ void FlushDecoderStream() { qpack_decoder_.FlushDecoderStream(); }
+
// Set up |progressive_decoder_|.
void StartDecoding() {
progressive_decoder_ = CreateProgressiveDecoder(/* stream_id = */ 1);
@@ -367,10 +369,17 @@
.InSequence(s);
EXPECT_CALL(handler_, OnHeaderDecoded(Eq("foo"), Eq("ZZZ"))).InSequence(s);
EXPECT_CALL(handler_, OnHeaderDecoded(Eq(":method"), Eq("ZZ"))).InSequence(s);
- EXPECT_CALL(decoder_stream_sender_delegate_,
- WriteStreamData(Eq(kHeaderAcknowledgement)))
- .InSequence(s);
+ if (!GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ EXPECT_CALL(decoder_stream_sender_delegate_,
+ WriteStreamData(Eq(kHeaderAcknowledgement)))
+ .InSequence(s);
+ }
EXPECT_CALL(handler_, OnDecodingCompleted()).InSequence(s);
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ EXPECT_CALL(decoder_stream_sender_delegate_,
+ WriteStreamData(Eq(kHeaderAcknowledgement)))
+ .InSequence(s);
+ }
DecodeHeaderBlock(absl::HexStringToBytes(
"0500" // Required Insert Count 4 and Delta Base 0.
@@ -381,6 +390,9 @@
"80" // Dynamic table entry with relative index 0, absolute index 3.
"41025a5a")); // Name of entry 1 (relative index) from dynamic table,
// with value "ZZ".
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ FlushDecoderStream();
+ }
EXPECT_CALL(handler_, OnHeaderDecoded(Eq("foo"), Eq("bar"))).InSequence(s);
EXPECT_CALL(handler_, OnHeaderDecoded(Eq("foo"), Eq("ZZZ"))).InSequence(s);
@@ -388,10 +400,17 @@
.InSequence(s);
EXPECT_CALL(handler_, OnHeaderDecoded(Eq("foo"), Eq("ZZZ"))).InSequence(s);
EXPECT_CALL(handler_, OnHeaderDecoded(Eq(":method"), Eq("ZZ"))).InSequence(s);
- EXPECT_CALL(decoder_stream_sender_delegate_,
- WriteStreamData(Eq(kHeaderAcknowledgement)))
- .InSequence(s);
+ if (!GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ EXPECT_CALL(decoder_stream_sender_delegate_,
+ WriteStreamData(Eq(kHeaderAcknowledgement)))
+ .InSequence(s);
+ }
EXPECT_CALL(handler_, OnDecodingCompleted()).InSequence(s);
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ EXPECT_CALL(decoder_stream_sender_delegate_,
+ WriteStreamData(Eq(kHeaderAcknowledgement)))
+ .InSequence(s);
+ }
DecodeHeaderBlock(absl::HexStringToBytes(
"0502" // Required Insert Count 4 and Delta Base 2.
@@ -402,6 +421,9 @@
"82" // Dynamic table entry with relative index 2, absolute index 3.
"43025a5a")); // Name of entry 3 (relative index) from dynamic table,
// with value "ZZ".
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ FlushDecoderStream();
+ }
EXPECT_CALL(handler_, OnHeaderDecoded(Eq("foo"), Eq("bar"))).InSequence(s);
EXPECT_CALL(handler_, OnHeaderDecoded(Eq("foo"), Eq("ZZZ"))).InSequence(s);
@@ -409,10 +431,17 @@
.InSequence(s);
EXPECT_CALL(handler_, OnHeaderDecoded(Eq("foo"), Eq("ZZZ"))).InSequence(s);
EXPECT_CALL(handler_, OnHeaderDecoded(Eq(":method"), Eq("ZZ"))).InSequence(s);
- EXPECT_CALL(decoder_stream_sender_delegate_,
- WriteStreamData(Eq(kHeaderAcknowledgement)))
- .InSequence(s);
+ if (!GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ EXPECT_CALL(decoder_stream_sender_delegate_,
+ WriteStreamData(Eq(kHeaderAcknowledgement)))
+ .InSequence(s);
+ }
EXPECT_CALL(handler_, OnDecodingCompleted()).InSequence(s);
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ EXPECT_CALL(decoder_stream_sender_delegate_,
+ WriteStreamData(Eq(kHeaderAcknowledgement)))
+ .InSequence(s);
+ }
DecodeHeaderBlock(absl::HexStringToBytes(
"0582" // Required Insert Count 4 and Delta Base 2 with sign bit set.
@@ -423,6 +452,9 @@
"12" // Dynamic table entry with post-base index 2, absolute index 3.
"01025a5a")); // Name of entry 1 (post-base index) from dynamic table,
// with value "ZZ".
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ FlushDecoderStream();
+ }
}
TEST_P(QpackDecoderTest, DecreasingDynamicTableCapacityEvictsEntries) {
@@ -453,6 +485,9 @@
"0200" // Required Insert Count 1 and Delta Base 0.
// Base is 1 + 0 = 1.
"80")); // Dynamic table entry with relative index 0, absolute index 0.
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ FlushDecoderStream();
+ }
}
TEST_P(QpackDecoderTest, EncoderStreamErrorEntryTooLarge) {
@@ -683,6 +718,9 @@
"0a00" // Encoded Required Insert Count 10, Required Insert Count 201,
// Delta Base 0, Base 201.
"80")); // Emit dynamic table entry with relative index 0.
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ FlushDecoderStream();
+ }
}
TEST_P(QpackDecoderTest, NonZeroRequiredInsertCountButNoDynamicEntries) {
@@ -842,6 +880,9 @@
DecodeEncoderStreamData(absl::HexStringToBytes("3fe107"));
// Add literal entry with name "foo" and value "bar".
DecodeEncoderStreamData(absl::HexStringToBytes("6294e703626172"));
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ FlushDecoderStream();
+ }
}
TEST_P(QpackDecoderTest, BlockedDecodingUnblockedBeforeEndOfHeaderBlock) {
@@ -879,6 +920,9 @@
EXPECT_CALL(decoder_stream_sender_delegate_,
WriteStreamData(Eq(kHeaderAcknowledgement)));
EndDecoding();
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ FlushDecoderStream();
+ }
}
// Regression test for https://crbug.com/1024263.
@@ -932,6 +976,9 @@
// Add literal entry with name "foo" and value "bar".
// Insert Count is now 6, reaching Required Insert Count of the header block.
DecodeEncoderStreamData(absl::HexStringToBytes("6294e70362617a"));
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ FlushDecoderStream();
+ }
}
TEST_P(QpackDecoderTest, TooManyBlockedStreams) {
@@ -972,6 +1019,9 @@
"0200" // Required Insert Count 1 and Delta Base 0.
// Base is 1 + 0 = 1.
"80")); // Dynamic table entry with relative index 0, absolute index 0.
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ FlushDecoderStream();
+ }
}
} // namespace
diff --git a/quiche/quic/core/quic_connection.cc b/quiche/quic/core/quic_connection.cc
index 11d59d1..857cf47 100644
--- a/quiche/quic/core/quic_connection.cc
+++ b/quiche/quic/core/quic_connection.cc
@@ -3171,7 +3171,7 @@
return connected_ && !HandleWriteBlocked();
}
-const QuicFrames QuicConnection::MaybeBundleAckOpportunistically() {
+const QuicFrames QuicConnection::MaybeBundleOpportunistically() {
if (!ack_frequency_sent_ && sent_packet_manager_.CanSendAckFrequency()) {
if (packet_creator_.NextSendingPacketNumber() >=
FirstSendingPacketNumber() + kMinReceivedBeforeAckDecimation) {
@@ -3182,6 +3182,11 @@
}
}
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ QUIC_RESTART_FLAG_COUNT_N(quic_opport_bundle_qpack_decoder_data, 1, 3);
+ visitor_->MaybeBundleOpportunistically();
+ }
+
QuicFrames frames;
const bool has_pending_ack =
uber_received_packet_manager_
@@ -3200,6 +3205,7 @@
<< encryption_level_ << " ACK, " << (has_pending_ack ? "" : "!")
<< "has_pending_ack";
frames.push_back(updated_ack_frame);
+ // TODO(fayang): remove return value by FlushAckFrame here.
return frames;
}
@@ -5786,6 +5792,10 @@
uber_received_packet_manager_.GetEarliestAckTimeout();
QUIC_BUG_IF(quic_bug_12714_32, !earliest_ack_timeout.IsInitialized());
MaybeBundleCryptoDataWithAcks();
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ QUIC_RESTART_FLAG_COUNT_N(quic_opport_bundle_qpack_decoder_data, 2, 3);
+ visitor_->MaybeBundleOpportunistically();
+ }
earliest_ack_timeout = uber_received_packet_manager_.GetEarliestAckTimeout();
if (!earliest_ack_timeout.IsInitialized()) {
return;
diff --git a/quiche/quic/core/quic_connection.h b/quiche/quic/core/quic_connection.h
index 04c02e5..01b9049 100644
--- a/quiche/quic/core/quic_connection.h
+++ b/quiche/quic/core/quic_connection.h
@@ -263,6 +263,9 @@
// Called when the client receives a preferred address from its peer.
virtual void OnServerPreferredAddressAvailable(
const QuicSocketAddress& server_preferred_address) = 0;
+
+ // Asks session to bundle data opportunistically with outgoing data.
+ virtual void MaybeBundleOpportunistically() = 0;
};
// Interface which gets callbacks from the QuicConnection at interesting
@@ -727,7 +730,7 @@
// QuicPacketCreator::DelegateInterface
bool ShouldGeneratePacket(HasRetransmittableData retransmittable,
IsHandshake handshake) override;
- const QuicFrames MaybeBundleAckOpportunistically() override;
+ const QuicFrames MaybeBundleOpportunistically() override;
QuicPacketBuffer GetPacketBuffer() override;
void OnSerializedPacket(SerializedPacket packet) override;
void OnUnrecoverableError(QuicErrorCode error,
diff --git a/quiche/quic/core/quic_connection_test.cc b/quiche/quic/core/quic_connection_test.cc
index daa49b3..ccb65bf 100644
--- a/quiche/quic/core/quic_connection_test.cc
+++ b/quiche/quic/core/quic_connection_test.cc
@@ -700,6 +700,9 @@
EXPECT_CALL(visitor_, OnCongestionWindowChange(_)).Times(AnyNumber());
EXPECT_CALL(visitor_, OnPacketReceived(_, _, _)).Times(AnyNumber());
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_)).Times(AnyNumber());
+ if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data)) {
+ EXPECT_CALL(visitor_, MaybeBundleOpportunistically()).Times(AnyNumber());
+ }
EXPECT_CALL(visitor_, OnOneRttPacketAcknowledged())
.Times(testing::AtMost(1));
EXPECT_CALL(*loss_algorithm_, GetLossTimeout())
diff --git a/quiche/quic/core/quic_dispatcher.cc b/quiche/quic/core/quic_dispatcher.cc
index 6f4c227..9fb397e 100644
--- a/quiche/quic/core/quic_dispatcher.cc
+++ b/quiche/quic/core/quic_dispatcher.cc
@@ -105,7 +105,7 @@
return true;
}
- const QuicFrames MaybeBundleAckOpportunistically() override {
+ const QuicFrames MaybeBundleOpportunistically() override {
QUICHE_DCHECK(false);
return {};
}
diff --git a/quiche/quic/core/quic_flags_list.h b/quiche/quic/core/quic_flags_list.h
index ad903a8..6744b55 100644
--- a/quiche/quic/core/quic_flags_list.h
+++ b/quiche/quic/core/quic_flags_list.h
@@ -35,6 +35,8 @@
QUIC_FLAG(quic_reloadable_flag_quic_can_send_ack_frequency, true)
// If true, allow client to enable BBRv2 on server via connection option \'B2ON\'.
QUIC_FLAG(quic_reloadable_flag_quic_allow_client_enabled_bbr_v2, true)
+// If true, always bundle qpack decoder data with other frames opportunistically.
+QUIC_FLAG(quic_restart_flag_quic_opport_bundle_qpack_decoder_data, false)
// If true, an endpoint does not detect path degrading or blackholing until handshake gets confirmed.
QUIC_FLAG(quic_reloadable_flag_quic_no_path_degrading_before_handshake_confirmed, true)
// If true, check connected at the beginning of TlsHandshaker::SetReadSecret.
diff --git a/quiche/quic/core/quic_packet_creator.cc b/quiche/quic/core/quic_packet_creator.cc
index f62f9d1..f0fa133 100644
--- a/quiche/quic/core/quic_packet_creator.cc
+++ b/quiche/quic/core/quic_packet_creator.cc
@@ -1282,7 +1282,7 @@
<< "Adding a control frame with no control frame id: " << frame;
QUICHE_DCHECK(QuicUtils::IsRetransmittableFrame(frame.type))
<< ENDPOINT << frame;
- MaybeBundleAckOpportunistically();
+ MaybeBundleOpportunistically();
if (HasPendingFrames()) {
if (AddFrame(frame, next_transmission_type_)) {
// There is pending frames and current frame fits.
@@ -1312,7 +1312,7 @@
<< "Packet flusher is not attached when "
"generator tries to write stream data.";
bool has_handshake = QuicUtils::IsCryptoStreamId(transport_version(), id);
- MaybeBundleAckOpportunistically();
+ MaybeBundleOpportunistically();
bool fin = state != NO_FIN;
QUIC_BUG_IF(quic_bug_12398_17, has_handshake && fin)
<< ENDPOINT << "Handshake packets should never send a fin";
@@ -1439,7 +1439,7 @@
<< ENDPOINT
<< "Packet flusher is not attached when "
"generator tries to write crypto data.";
- MaybeBundleAckOpportunistically();
+ MaybeBundleOpportunistically();
// To make reasoning about crypto frames easier, we don't combine them with
// other retransmittable frames in a single packet.
// TODO(nharper): Once we have separate packet number spaces, everything
@@ -1511,7 +1511,7 @@
SetMaxPacketLength(current_mtu);
}
-void QuicPacketCreator::MaybeBundleAckOpportunistically() {
+void QuicPacketCreator::MaybeBundleOpportunistically() {
if (has_ack()) {
// Ack already queued, nothing to do.
return;
@@ -1520,8 +1520,7 @@
NOT_HANDSHAKE)) {
return;
}
- const bool flushed =
- FlushAckFrame(delegate_->MaybeBundleAckOpportunistically());
+ const bool flushed = FlushAckFrame(delegate_->MaybeBundleOpportunistically());
QUIC_BUG_IF(quic_bug_10752_29, !flushed)
<< ENDPOINT << "Failed to flush ACK frame. encryption_level:"
<< packet_.encryption_level;
@@ -1532,8 +1531,8 @@
<< ENDPOINT
<< "Packet flusher is not attached when "
"generator tries to send ACK frame.";
- // MaybeBundleAckOpportunistically could be called nestedly when sending a
- // control frame causing another control frame to be sent.
+ // MaybeBundleOpportunistically could be called nestedly when
+ // sending a control frame causing another control frame to be sent.
QUIC_BUG_IF(quic_bug_12398_18, !frames.empty() && has_ack())
<< ENDPOINT << "Trying to flush " << quiche::PrintElements(frames)
<< " when there is ACK queued";
@@ -1615,7 +1614,7 @@
<< ENDPOINT
<< "Packet flusher is not attached when "
"generator tries to add message frame.";
- MaybeBundleAckOpportunistically();
+ MaybeBundleOpportunistically();
const QuicByteCount message_length = MemSliceSpanTotalSize(message);
if (message_length > GetCurrentLargestMessagePayload()) {
return MESSAGE_STATUS_TOO_LARGE;
diff --git a/quiche/quic/core/quic_packet_creator.h b/quiche/quic/core/quic_packet_creator.h
index 7c53414..88f17d5 100644
--- a/quiche/quic/core/quic_packet_creator.h
+++ b/quiche/quic/core/quic_packet_creator.h
@@ -60,9 +60,9 @@
// Consults delegate whether a packet should be generated.
virtual bool ShouldGeneratePacket(HasRetransmittableData retransmittable,
IsHandshake handshake) = 0;
- // Called when there is data to be sent. Retrieves updated ACK frame from
- // the delegate.
- virtual const QuicFrames MaybeBundleAckOpportunistically() = 0;
+ // Called when there is data to be sent. Gives delegate a chance to bundle
+ // anything with to-be-sent data.
+ virtual const QuicFrames MaybeBundleOpportunistically() = 0;
// Returns the packet fate for serialized packets which will be handed over
// to delegate via OnSerializedPacket(). Called when a packet is about to be
@@ -369,9 +369,9 @@
// Generates an MTU discovery packet of specified size.
void GenerateMtuDiscoveryPacket(QuicByteCount target_mtu);
- // Called when there is data to be sent, Retrieves updated ACK frame from
- // delegate_ and flushes it.
- void MaybeBundleAckOpportunistically();
+ // Called when there is data to be sent. Gives delegate a chance to bundle any
+ // data (including ACK).
+ void MaybeBundleOpportunistically();
// Called to flush ACK and STOP_WAITING frames, returns false if the flush
// fails.
diff --git a/quiche/quic/core/quic_packet_creator_test.cc b/quiche/quic/core/quic_packet_creator_test.cc
index aa919db..30c8173 100644
--- a/quiche/quic/core/quic_packet_creator_test.cc
+++ b/quiche/quic/core/quic_packet_creator_test.cc
@@ -2476,8 +2476,7 @@
MOCK_METHOD(bool, ShouldGeneratePacket,
(HasRetransmittableData retransmittable, IsHandshake handshake),
(override));
- MOCK_METHOD(const QuicFrames, MaybeBundleAckOpportunistically, (),
- (override));
+ MOCK_METHOD(const QuicFrames, MaybeBundleOpportunistically, (), (override));
MOCK_METHOD(QuicPacketBuffer, GetPacketBuffer, (), (override));
MOCK_METHOD(void, OnSerializedPacket, (SerializedPacket), (override));
MOCK_METHOD(void, OnUnrecoverableError, (QuicErrorCode, const std::string&),
@@ -2556,7 +2555,7 @@
}
if (delegate_->ShouldGeneratePacket(NO_RETRANSMITTABLE_DATA,
NOT_HANDSHAKE)) {
- EXPECT_CALL(*delegate_, MaybeBundleAckOpportunistically())
+ EXPECT_CALL(*delegate_, MaybeBundleOpportunistically())
.WillOnce(Return(frames));
}
}
@@ -2583,7 +2582,7 @@
}
if (!has_ack() && delegate_->ShouldGeneratePacket(NO_RETRANSMITTABLE_DATA,
NOT_HANDSHAKE)) {
- EXPECT_CALL(*delegate_, MaybeBundleAckOpportunistically()).Times(1);
+ EXPECT_CALL(*delegate_, MaybeBundleOpportunistically()).Times(1);
}
return QuicPacketCreator::ConsumeData(id, data.length(), offset, state);
}
@@ -2592,7 +2591,7 @@
quiche::QuicheMemSlice message) {
if (!has_ack() && delegate_->ShouldGeneratePacket(NO_RETRANSMITTABLE_DATA,
NOT_HANDSHAKE)) {
- EXPECT_CALL(*delegate_, MaybeBundleAckOpportunistically()).Times(1);
+ EXPECT_CALL(*delegate_, MaybeBundleOpportunistically()).Times(1);
}
return QuicPacketCreator::AddMessageFrame(message_id,
absl::MakeSpan(&message, 1));
@@ -2603,7 +2602,7 @@
producer_->SaveCryptoData(level, offset, data);
if (!has_ack() && delegate_->ShouldGeneratePacket(NO_RETRANSMITTABLE_DATA,
NOT_HANDSHAKE)) {
- EXPECT_CALL(*delegate_, MaybeBundleAckOpportunistically()).Times(1);
+ EXPECT_CALL(*delegate_, MaybeBundleOpportunistically()).Times(1);
}
return QuicPacketCreator::ConsumeCryptoData(level, data.length(), offset);
}
diff --git a/quiche/quic/core/quic_session.h b/quiche/quic/core/quic_session.h
index fe7e4bb..a518091 100644
--- a/quiche/quic/core/quic_session.h
+++ b/quiche/quic/core/quic_session.h
@@ -189,6 +189,7 @@
std::unique_ptr<QuicPathValidationContext> /*context*/) override {}
void OnServerPreferredAddressAvailable(
const QuicSocketAddress& /*server_preferred_address*/) override;
+ void MaybeBundleOpportunistically() override {}
// QuicStreamFrameDataProducer
WriteStreamDataResult WriteStreamData(QuicStreamId id,
@@ -841,6 +842,11 @@
return absl::nullopt;
}
+ // Debug helper for OnCanWrite. Check that after QuicStream::OnCanWrite(),
+ // if stream has buffered data and is not stream level flow control blocked,
+ // it has to be in the write blocked list.
+ virtual bool CheckStreamWriteBlocked(QuicStream* stream) const;
+
private:
friend class test::QuicSessionPeer;
@@ -872,11 +878,6 @@
uint64_t previous_bytes_written,
bool previous_fin_sent);
- // Debug helper for OnCanWrite. Check that after QuicStream::OnCanWrite(),
- // if stream has buffered data and is not stream level flow control blocked,
- // it has to be in the write blocked list.
- bool CheckStreamWriteBlocked(QuicStream* stream) const;
-
// Called in OnConfigNegotiated for Finch trials to measure performance of
// starting with larger flow control receive windows.
void AdjustInitialFlowControlWindows(size_t stream_window);
diff --git a/quiche/quic/test_tools/quic_test_utils.h b/quiche/quic/test_tools/quic_test_utils.h
index 3d58222..9d7ad23 100644
--- a/quiche/quic/test_tools/quic_test_utils.h
+++ b/quiche/quic/test_tools/quic_test_utils.h
@@ -507,6 +507,7 @@
(std::unique_ptr<QuicPathValidationContext>), (override));
MOCK_METHOD(void, OnServerPreferredAddressAvailable,
(const QuicSocketAddress&), (override));
+ MOCK_METHOD(void, MaybeBundleOpportunistically, (), (override));
void OnBandwidthUpdateTimeout() override {}
};
@@ -1418,8 +1419,7 @@
MOCK_METHOD(bool, ShouldGeneratePacket,
(HasRetransmittableData retransmittable, IsHandshake handshake),
(override));
- MOCK_METHOD(const QuicFrames, MaybeBundleAckOpportunistically, (),
- (override));
+ MOCK_METHOD(const QuicFrames, MaybeBundleOpportunistically, (), (override));
MOCK_METHOD(SerializedPacketFate, GetSerializedPacketFate,
(bool, EncryptionLevel), (override));
};
diff --git a/quiche/quic/test_tools/simulator/quic_endpoint.h b/quiche/quic/test_tools/simulator/quic_endpoint.h
index 84f5ad9..c3c3a1c 100644
--- a/quiche/quic/test_tools/simulator/quic_endpoint.h
+++ b/quiche/quic/test_tools/simulator/quic_endpoint.h
@@ -112,6 +112,7 @@
std::unique_ptr<QuicPathValidationContext> /*context*/) override {}
void OnServerPreferredAddressAvailable(
const QuicSocketAddress& /*server_preferred_address*/) override {}
+ void MaybeBundleOpportunistically() override {}
// End QuicConnectionVisitorInterface implementation.
