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quiche / quiche / 8ea59422159fabce7a653edd7d1d7ba5e6e7e896 / . / quic / core / http / quic_spdy_session.cc
blob: a86aefadd98464270e827c1f0f25c0354ad691c8 [file] [log] [blame]
// Copyright (c) 2015 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/quic/core/http/quic_spdy_session.h"
#include <algorithm>
#include <cstdint>
#include <limits>
#include <string>
#include <utility>
#include "absl/base/attributes.h"
#include "absl/strings/numbers.h"
#include "absl/strings/str_cat.h"
#include "absl/strings/string_view.h"
#include "net/third_party/quiche/src/quic/core/http/http_constants.h"
#include "net/third_party/quiche/src/quic/core/http/quic_headers_stream.h"
#include "net/third_party/quiche/src/quic/core/quic_error_codes.h"
#include "net/third_party/quiche/src/quic/core/quic_types.h"
#include "net/third_party/quiche/src/quic/core/quic_utils.h"
#include "net/third_party/quiche/src/quic/core/quic_versions.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_bug_tracker.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_exported_stats.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_flag_utils.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_flags.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_logging.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_stack_trace.h"
#include "net/third_party/quiche/src/common/platform/api/quiche_text_utils.h"
#include "net/third_party/quiche/src/spdy/core/http2_frame_decoder_adapter.h"
using http2::Http2DecoderAdapter;
using spdy::HpackEntry;
using spdy::HpackHeaderTable;
using spdy::Http2WeightToSpdy3Priority;
using spdy::Spdy3PriorityToHttp2Weight;
using spdy::SpdyErrorCode;
using spdy::SpdyFramer;
using spdy::SpdyFramerDebugVisitorInterface;
using spdy::SpdyFramerVisitorInterface;
using spdy::SpdyFrameType;
using spdy::SpdyHeaderBlock;
using spdy::SpdyHeadersHandlerInterface;
using spdy::SpdyHeadersIR;
using spdy::SpdyKnownSettingsId;
using spdy::SpdyPingId;
using spdy::SpdyPriority;
using spdy::SpdyPriorityIR;
using spdy::SpdyPushPromiseIR;
using spdy::SpdySerializedFrame;
using spdy::SpdySettingsId;
using spdy::SpdyStreamId;
namespace quic {
namespace {
#define ENDPOINT \
(perspective() == Perspective::IS_SERVER ? "Server: " : "Client: ")
class HeaderTableDebugVisitor : public HpackHeaderTable::DebugVisitorInterface {
public:
HeaderTableDebugVisitor(const QuicClock* clock,
std::unique_ptr<QuicHpackDebugVisitor> visitor)
: clock_(clock), headers_stream_hpack_visitor_(std::move(visitor)) {}
HeaderTableDebugVisitor(const HeaderTableDebugVisitor&) = delete;
HeaderTableDebugVisitor& operator=(const HeaderTableDebugVisitor&) = delete;
int64_t OnNewEntry(const HpackEntry& entry) override {
QUIC_DVLOG(1) << entry.GetDebugString();
return (clock_->ApproximateNow() - QuicTime::Zero()).ToMicroseconds();
}
void OnUseEntry(const HpackEntry& entry) override {
const QuicTime::Delta elapsed(
clock_->ApproximateNow() -
QuicTime::Delta::FromMicroseconds(entry.time_added()) -
QuicTime::Zero());
QUIC_DVLOG(1) << entry.GetDebugString() << " " << elapsed.ToMilliseconds()
<< " ms";
headers_stream_hpack_visitor_->OnUseEntry(elapsed);
}
private:
const QuicClock* clock_;
std::unique_ptr<QuicHpackDebugVisitor> headers_stream_hpack_visitor_;
};
} // namespace
// A SpdyFramerVisitor that passes HEADERS frames to the QuicSpdyStream, and
// closes the connection if any unexpected frames are received.
class QuicSpdySession::SpdyFramerVisitor
: public SpdyFramerVisitorInterface,
public SpdyFramerDebugVisitorInterface {
public:
explicit SpdyFramerVisitor(QuicSpdySession* session) : session_(session) {}
SpdyFramerVisitor(const SpdyFramerVisitor&) = delete;
SpdyFramerVisitor& operator=(const SpdyFramerVisitor&) = delete;
SpdyHeadersHandlerInterface* OnHeaderFrameStart(
SpdyStreamId /* stream_id */) override {
DCHECK(!VersionUsesHttp3(session_->transport_version()));
return &header_list_;
}
void OnHeaderFrameEnd(SpdyStreamId /* stream_id */) override {
DCHECK(!VersionUsesHttp3(session_->transport_version()));
LogHeaderCompressionRatioHistogram(
/* using_qpack = */ false,
/* is_sent = */ false, header_list_.compressed_header_bytes(),
header_list_.uncompressed_header_bytes());
if (session_->IsConnected()) {
session_->OnHeaderList(header_list_);
}
header_list_.Clear();
}
void OnStreamFrameData(SpdyStreamId /*stream_id*/,
const char* /*data*/,
size_t /*len*/) override {
DCHECK(!VersionUsesHttp3(session_->transport_version()));
CloseConnection("SPDY DATA frame received.",
QUIC_INVALID_HEADERS_STREAM_DATA);
}
void OnStreamEnd(SpdyStreamId /*stream_id*/) override {
// The framer invokes OnStreamEnd after processing a frame that had the fin
// bit set.
}
void OnStreamPadding(SpdyStreamId /*stream_id*/, size_t /*len*/) override {
CloseConnection("SPDY frame padding received.",
QUIC_INVALID_HEADERS_STREAM_DATA);
}
void OnError(Http2DecoderAdapter::SpdyFramerError error,
std::string detailed_error) override {
QuicErrorCode code;
switch (error) {
case Http2DecoderAdapter::SpdyFramerError::SPDY_HPACK_INDEX_VARINT_ERROR:
code = QUIC_HPACK_INDEX_VARINT_ERROR;
break;
case Http2DecoderAdapter::SpdyFramerError::
SPDY_HPACK_NAME_LENGTH_VARINT_ERROR:
code = QUIC_HPACK_NAME_LENGTH_VARINT_ERROR;
break;
case Http2DecoderAdapter::SpdyFramerError::
SPDY_HPACK_VALUE_LENGTH_VARINT_ERROR:
code = QUIC_HPACK_VALUE_LENGTH_VARINT_ERROR;
break;
case Http2DecoderAdapter::SpdyFramerError::SPDY_HPACK_NAME_TOO_LONG:
code = QUIC_HPACK_NAME_TOO_LONG;
break;
case Http2DecoderAdapter::SpdyFramerError::SPDY_HPACK_VALUE_TOO_LONG:
code = QUIC_HPACK_VALUE_TOO_LONG;
break;
case Http2DecoderAdapter::SpdyFramerError::SPDY_HPACK_NAME_HUFFMAN_ERROR:
code = QUIC_HPACK_NAME_HUFFMAN_ERROR;
break;
case Http2DecoderAdapter::SpdyFramerError::SPDY_HPACK_VALUE_HUFFMAN_ERROR:
code = QUIC_HPACK_VALUE_HUFFMAN_ERROR;
break;
case Http2DecoderAdapter::SpdyFramerError::
SPDY_HPACK_MISSING_DYNAMIC_TABLE_SIZE_UPDATE:
code = QUIC_HPACK_MISSING_DYNAMIC_TABLE_SIZE_UPDATE;
break;
case Http2DecoderAdapter::SpdyFramerError::SPDY_HPACK_INVALID_INDEX:
code = QUIC_HPACK_INVALID_INDEX;
break;
case Http2DecoderAdapter::SpdyFramerError::SPDY_HPACK_INVALID_NAME_INDEX:
code = QUIC_HPACK_INVALID_NAME_INDEX;
break;
case Http2DecoderAdapter::SpdyFramerError::
SPDY_HPACK_DYNAMIC_TABLE_SIZE_UPDATE_NOT_ALLOWED:
code = QUIC_HPACK_DYNAMIC_TABLE_SIZE_UPDATE_NOT_ALLOWED;
break;
case Http2DecoderAdapter::SpdyFramerError::
SPDY_HPACK_INITIAL_DYNAMIC_TABLE_SIZE_UPDATE_IS_ABOVE_LOW_WATER_MARK:
code = QUIC_HPACK_INITIAL_TABLE_SIZE_UPDATE_IS_ABOVE_LOW_WATER_MARK;
break;
case Http2DecoderAdapter::SpdyFramerError::
SPDY_HPACK_DYNAMIC_TABLE_SIZE_UPDATE_IS_ABOVE_ACKNOWLEDGED_SETTING:
code = QUIC_HPACK_TABLE_SIZE_UPDATE_IS_ABOVE_ACKNOWLEDGED_SETTING;
break;
case Http2DecoderAdapter::SpdyFramerError::SPDY_HPACK_TRUNCATED_BLOCK:
code = QUIC_HPACK_TRUNCATED_BLOCK;
break;
case Http2DecoderAdapter::SpdyFramerError::SPDY_HPACK_FRAGMENT_TOO_LONG:
code = QUIC_HPACK_FRAGMENT_TOO_LONG;
break;
case Http2DecoderAdapter::SpdyFramerError::
SPDY_HPACK_COMPRESSED_HEADER_SIZE_EXCEEDS_LIMIT:
code = QUIC_HPACK_COMPRESSED_HEADER_SIZE_EXCEEDS_LIMIT;
break;
case Http2DecoderAdapter::SpdyFramerError::SPDY_DECOMPRESS_FAILURE:
code = QUIC_HEADERS_STREAM_DATA_DECOMPRESS_FAILURE;
break;
default:
code = QUIC_INVALID_HEADERS_STREAM_DATA;
}
CloseConnection(
absl::StrCat("SPDY framing error: ", detailed_error,
Http2DecoderAdapter::SpdyFramerErrorToString(error)),
code);
}
void OnDataFrameHeader(SpdyStreamId /*stream_id*/,
size_t /*length*/,
bool /*fin*/) override {
DCHECK(!VersionUsesHttp3(session_->transport_version()));
CloseConnection("SPDY DATA frame received.",
QUIC_INVALID_HEADERS_STREAM_DATA);
}
void OnRstStream(SpdyStreamId /*stream_id*/,
SpdyErrorCode /*error_code*/) override {
CloseConnection("SPDY RST_STREAM frame received.",
QUIC_INVALID_HEADERS_STREAM_DATA);
}
void OnSetting(SpdySettingsId id, uint32_t value) override {
DCHECK(!VersionUsesHttp3(session_->transport_version()));
session_->OnSetting(id, value);
}
void OnSettingsEnd() override {
DCHECK(!VersionUsesHttp3(session_->transport_version()));
}
void OnPing(SpdyPingId /*unique_id*/, bool /*is_ack*/) override {
CloseConnection("SPDY PING frame received.",
QUIC_INVALID_HEADERS_STREAM_DATA);
}
void OnGoAway(SpdyStreamId /*last_accepted_stream_id*/,
SpdyErrorCode /*error_code*/) override {
CloseConnection("SPDY GOAWAY frame received.",
QUIC_INVALID_HEADERS_STREAM_DATA);
}
void OnHeaders(SpdyStreamId stream_id,
bool has_priority,
int weight,
SpdyStreamId parent_stream_id,
bool exclusive,
bool fin,
bool /*end*/) override {
if (!session_->IsConnected()) {
return;
}
if (VersionUsesHttp3(session_->transport_version())) {
CloseConnection("HEADERS frame not allowed on headers stream.",
QUIC_INVALID_HEADERS_STREAM_DATA);
return;
}
QUIC_BUG_IF(session_->destruction_indicator() != 123456789)
<< "QuicSpdyStream use after free. "
<< session_->destruction_indicator() << QuicStackTrace();
if (session_->use_http2_priority_write_scheduler()) {
session_->OnHeaders(
stream_id, has_priority,
spdy::SpdyStreamPrecedence(parent_stream_id, weight, exclusive), fin);
return;
}
SpdyPriority priority =
has_priority ? Http2WeightToSpdy3Priority(weight) : 0;
session_->OnHeaders(stream_id, has_priority,
spdy::SpdyStreamPrecedence(priority), fin);
}
void OnWindowUpdate(SpdyStreamId /*stream_id*/,
int /*delta_window_size*/) override {
CloseConnection("SPDY WINDOW_UPDATE frame received.",
QUIC_INVALID_HEADERS_STREAM_DATA);
}
void OnPushPromise(SpdyStreamId stream_id,
SpdyStreamId promised_stream_id,
bool /*end*/) override {
DCHECK(!VersionUsesHttp3(session_->transport_version()));
if (session_->perspective() != Perspective::IS_CLIENT) {
CloseConnection("PUSH_PROMISE not supported.",
QUIC_INVALID_HEADERS_STREAM_DATA);
return;
}
if (!session_->IsConnected()) {
return;
}
session_->OnPushPromise(stream_id, promised_stream_id);
}
void OnContinuation(SpdyStreamId /*stream_id*/, bool /*end*/) override {}
void OnPriority(SpdyStreamId stream_id,
SpdyStreamId parent_id,
int weight,
bool exclusive) override {
DCHECK(!VersionUsesHttp3(session_->transport_version()));
if (!session_->IsConnected()) {
return;
}
if (session_->use_http2_priority_write_scheduler()) {
session_->OnPriority(
stream_id, spdy::SpdyStreamPrecedence(parent_id, weight, exclusive));
return;
}
SpdyPriority priority = Http2WeightToSpdy3Priority(weight);
session_->OnPriority(stream_id, spdy::SpdyStreamPrecedence(priority));
}
bool OnUnknownFrame(SpdyStreamId /*stream_id*/,
uint8_t /*frame_type*/) override {
CloseConnection("Unknown frame type received.",
QUIC_INVALID_HEADERS_STREAM_DATA);
return false;
}
// SpdyFramerDebugVisitorInterface implementation
void OnSendCompressedFrame(SpdyStreamId /*stream_id*/,
SpdyFrameType /*type*/,
size_t payload_len,
size_t frame_len) override {
if (payload_len == 0) {
QUIC_BUG << "Zero payload length.";
return;
}
int compression_pct = 100 - (100 * frame_len) / payload_len;
QUIC_DVLOG(1) << "Net.QuicHpackCompressionPercentage: " << compression_pct;
}
void OnReceiveCompressedFrame(SpdyStreamId /*stream_id*/,
SpdyFrameType /*type*/,
size_t frame_len) override {
if (session_->IsConnected()) {
session_->OnCompressedFrameSize(frame_len);
}
}
void set_max_header_list_size(size_t max_header_list_size) {
header_list_.set_max_header_list_size(max_header_list_size);
}
private:
void CloseConnection(const std::string& details, QuicErrorCode code) {
if (session_->IsConnected()) {
session_->CloseConnectionWithDetails(code, details);
}
}
QuicSpdySession* session_;
QuicHeaderList header_list_;
};
QuicHpackDebugVisitor::QuicHpackDebugVisitor() {}
QuicHpackDebugVisitor::~QuicHpackDebugVisitor() {}
Http3DebugVisitor::Http3DebugVisitor() {}
Http3DebugVisitor::~Http3DebugVisitor() {}
// Expected unidirectional static streams Requirement can be found at
// https://tools.ietf.org/html/draft-ietf-quic-http-22#section-6.2.
QuicSpdySession::QuicSpdySession(
QuicConnection* connection,
QuicSession::Visitor* visitor,
const QuicConfig& config,
const ParsedQuicVersionVector& supported_versions)
: QuicSession(connection,
visitor,
config,
supported_versions,
/*num_expected_unidirectional_static_streams = */
VersionUsesHttp3(connection->transport_version())
? kHttp3StaticUnidirectionalStreamCount
: 0),
send_control_stream_(nullptr),
receive_control_stream_(nullptr),
qpack_encoder_receive_stream_(nullptr),
qpack_decoder_receive_stream_(nullptr),
qpack_encoder_send_stream_(nullptr),
qpack_decoder_send_stream_(nullptr),
qpack_maximum_dynamic_table_capacity_(
kDefaultQpackMaxDynamicTableCapacity),
qpack_maximum_blocked_streams_(kDefaultMaximumBlockedStreams),
max_inbound_header_list_size_(kDefaultMaxUncompressedHeaderSize),
max_outbound_header_list_size_(std::numeric_limits<size_t>::max()),
stream_id_(
QuicUtils::GetInvalidStreamId(connection->transport_version())),
promised_stream_id_(
QuicUtils::GetInvalidStreamId(connection->transport_version())),
frame_len_(0),
fin_(false),
spdy_framer_(SpdyFramer::ENABLE_COMPRESSION),
spdy_framer_visitor_(new SpdyFramerVisitor(this)),
debug_visitor_(nullptr),
destruction_indicator_(123456789),
server_push_enabled_(true),
ietf_server_push_enabled_(
GetQuicFlag(FLAGS_quic_enable_http3_server_push)),
http3_max_push_id_sent_(false),
goaway_with_max_stream_id_(
GetQuicReloadableFlag(quic_goaway_with_max_stream_id)) {
if (goaway_with_max_stream_id_) {
QUIC_RELOADABLE_FLAG_COUNT_N(quic_goaway_with_max_stream_id, 1, 2);
}
h2_deframer_.set_visitor(spdy_framer_visitor_.get());
h2_deframer_.set_debug_visitor(spdy_framer_visitor_.get());
spdy_framer_.set_debug_visitor(spdy_framer_visitor_.get());
}
QuicSpdySession::~QuicSpdySession() {
QUIC_BUG_IF(destruction_indicator_ != 123456789)
<< "QuicSpdyStream use after free. " << destruction_indicator_
<< QuicStackTrace();
destruction_indicator_ = 987654321;
}
void QuicSpdySession::Initialize() {
QuicSession::Initialize();
FillSettingsFrame();
if (!VersionUsesHttp3(transport_version())) {
if (perspective() == Perspective::IS_SERVER) {
set_largest_peer_created_stream_id(
QuicUtils::GetHeadersStreamId(transport_version()));
} else {
QuicStreamId headers_stream_id = GetNextOutgoingBidirectionalStreamId();
DCHECK_EQ(headers_stream_id,
QuicUtils::GetHeadersStreamId(transport_version()));
}
auto headers_stream = std::make_unique<QuicHeadersStream>((this));
DCHECK_EQ(QuicUtils::GetHeadersStreamId(transport_version()),
headers_stream->id());
headers_stream_ = headers_stream.get();
ActivateStream(std::move(headers_stream));
} else {
qpack_encoder_ = std::make_unique<QpackEncoder>(this);
qpack_decoder_ =
std::make_unique<QpackDecoder>(qpack_maximum_dynamic_table_capacity_,
qpack_maximum_blocked_streams_, this);
MaybeInitializeHttp3UnidirectionalStreams();
}
spdy_framer_visitor_->set_max_header_list_size(max_inbound_header_list_size_);
// Limit HPACK buffering to 2x header list size limit.
h2_deframer_.GetHpackDecoder()->set_max_decode_buffer_size_bytes(
2 * max_inbound_header_list_size_);
}
void QuicSpdySession::FillSettingsFrame() {
settings_.values[SETTINGS_QPACK_MAX_TABLE_CAPACITY] =
qpack_maximum_dynamic_table_capacity_;
settings_.values[SETTINGS_QPACK_BLOCKED_STREAMS] =
qpack_maximum_blocked_streams_;
settings_.values[SETTINGS_MAX_FIELD_SECTION_SIZE] =
max_inbound_header_list_size_;
}
void QuicSpdySession::OnDecoderStreamError(QuicErrorCode error_code,
absl::string_view error_message) {
DCHECK(VersionUsesHttp3(transport_version()));
CloseConnectionWithDetails(
error_code, absl::StrCat("Decoder stream error: ", error_message));
}
void QuicSpdySession::OnEncoderStreamError(QuicErrorCode error_code,
absl::string_view error_message) {
DCHECK(VersionUsesHttp3(transport_version()));
CloseConnectionWithDetails(
error_code, absl::StrCat("Encoder stream error: ", error_message));
}
void QuicSpdySession::OnStreamHeadersPriority(
QuicStreamId stream_id,
const spdy::SpdyStreamPrecedence& precedence) {
QuicSpdyStream* stream = GetOrCreateSpdyDataStream(stream_id);
if (!stream) {
// It's quite possible to receive headers after a stream has been reset.
return;
}
stream->OnStreamHeadersPriority(precedence);
}
void QuicSpdySession::OnStreamHeaderList(QuicStreamId stream_id,
bool fin,
size_t frame_len,
const QuicHeaderList& header_list) {
if (IsStaticStream(stream_id)) {
connection()->CloseConnection(
QUIC_INVALID_HEADERS_STREAM_DATA, "stream is static",
ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
return;
}
QuicSpdyStream* stream = GetOrCreateSpdyDataStream(stream_id);
if (stream == nullptr) {
// The stream no longer exists, but trailing headers may contain the final
// byte offset necessary for flow control and open stream accounting.
size_t final_byte_offset = 0;
for (const auto& header : header_list) {
const std::string& header_key = header.first;
const std::string& header_value = header.second;
if (header_key == kFinalOffsetHeaderKey) {
if (!absl::SimpleAtoi(header_value, &final_byte_offset)) {
connection()->CloseConnection(
QUIC_INVALID_HEADERS_STREAM_DATA,
"Trailers are malformed (no final offset)",
ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
return;
}
QUIC_DVLOG(1) << ENDPOINT
<< "Received final byte offset in trailers for stream "
<< stream_id << ", which no longer exists.";
OnFinalByteOffsetReceived(stream_id, final_byte_offset);
}
}
// It's quite possible to receive headers after a stream has been reset.
return;
}
stream->OnStreamHeaderList(fin, frame_len, header_list);
}
void QuicSpdySession::OnPriorityFrame(
QuicStreamId stream_id,
const spdy::SpdyStreamPrecedence& precedence) {
QuicSpdyStream* stream = GetOrCreateSpdyDataStream(stream_id);
if (!stream) {
// It's quite possible to receive a PRIORITY frame after a stream has been
// reset.
return;
}
stream->OnPriorityFrame(precedence);
}
bool QuicSpdySession::OnPriorityUpdateForRequestStream(QuicStreamId stream_id,
int urgency) {
if (perspective() == Perspective::IS_CLIENT ||
!QuicUtils::IsBidirectionalStreamId(stream_id, version()) ||
!QuicUtils::IsClientInitiatedStreamId(transport_version(), stream_id)) {
return true;
}
QuicStreamCount advertised_max_incoming_bidirectional_streams =
GetAdvertisedMaxIncomingBidirectionalStreams();
if (advertised_max_incoming_bidirectional_streams == 0 ||
stream_id > QuicUtils::GetFirstBidirectionalStreamId(
transport_version(), Perspective::IS_CLIENT) +
QuicUtils::StreamIdDelta(transport_version()) *
(advertised_max_incoming_bidirectional_streams - 1)) {
connection()->CloseConnection(
QUIC_INVALID_STREAM_ID,
"PRIORITY_UPDATE frame received for invalid stream.",
ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
return false;
}
if (MaybeSetStreamPriority(stream_id, spdy::SpdyStreamPrecedence(urgency))) {
return true;
}
if (IsClosedStream(stream_id)) {
return true;
}
buffered_stream_priorities_[stream_id] = urgency;
if (buffered_stream_priorities_.size() >
10 * max_open_incoming_bidirectional_streams()) {
// This should never happen, because |buffered_stream_priorities_| should
// only contain entries for streams that are allowed to be open by the peer
// but have not been opened yet.
std::string error_message =
absl::StrCat("Too many stream priority values buffered: ",
buffered_stream_priorities_.size(),
", which should not exceed the incoming stream limit of ",
max_open_incoming_bidirectional_streams());
QUIC_BUG << error_message;
connection()->CloseConnection(
QUIC_INTERNAL_ERROR, error_message,
ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
return false;
}
return true;
}
bool QuicSpdySession::OnPriorityUpdateForPushStream(QuicStreamId /*push_id*/,
int /*urgency*/) {
// TODO(b/147306124): Implement PRIORITY_UPDATE frames for pushed streams.
return true;
}
size_t QuicSpdySession::ProcessHeaderData(const struct iovec& iov) {
QUIC_BUG_IF(destruction_indicator_ != 123456789)
<< "QuicSpdyStream use after free. " << destruction_indicator_
<< QuicStackTrace();
return h2_deframer_.ProcessInput(static_cast<char*>(iov.iov_base),
iov.iov_len);
}
size_t QuicSpdySession::WriteHeadersOnHeadersStream(
QuicStreamId id,
SpdyHeaderBlock headers,
bool fin,
const spdy::SpdyStreamPrecedence& precedence,
QuicReferenceCountedPointer<QuicAckListenerInterface> ack_listener) {
DCHECK(!VersionUsesHttp3(transport_version()));
return WriteHeadersOnHeadersStreamImpl(
id, std::move(headers), fin,
/* parent_stream_id = */ 0,
Spdy3PriorityToHttp2Weight(precedence.spdy3_priority()),
/* exclusive = */ false, std::move(ack_listener));
}
size_t QuicSpdySession::WritePriority(QuicStreamId id,
QuicStreamId parent_stream_id,
int weight,
bool exclusive) {
DCHECK(!VersionUsesHttp3(transport_version()));
SpdyPriorityIR priority_frame(id, parent_stream_id, weight, exclusive);
SpdySerializedFrame frame(spdy_framer_.SerializeFrame(priority_frame));
headers_stream()->WriteOrBufferData(
absl::string_view(frame.data(), frame.size()), false, nullptr);
return frame.size();
}
void QuicSpdySession::WriteHttp3PriorityUpdate(
const PriorityUpdateFrame& priority_update) {
DCHECK(VersionUsesHttp3(transport_version()));
send_control_stream_->WritePriorityUpdate(priority_update);
}
void QuicSpdySession::OnHttp3GoAway(uint64_t id) {
QUIC_BUG_IF(!version().UsesHttp3())
<< "HTTP/3 GOAWAY received on version " << version();
if (last_received_http3_goaway_id_.has_value() &&
id > last_received_http3_goaway_id_.value()) {
CloseConnectionWithDetails(
QUIC_HTTP_GOAWAY_ID_LARGER_THAN_PREVIOUS,
absl::StrCat("GOAWAY received with ID ", id,
" greater than previously received ID ",
last_received_http3_goaway_id_.value()));
return;
}
last_received_http3_goaway_id_ = id;
if (perspective() == Perspective::IS_SERVER) {
// TODO(b/151749109): Cancel server pushes with push ID larger than |id|.
return;
}
// QuicStreamId is uint32_t. Casting to this narrower type is well-defined
// and preserves the lower 32 bits. Both IsBidirectionalStreamId() and
// IsIncomingStream() give correct results, because their return value is
// determined by the least significant two bits.
QuicStreamId stream_id = static_cast<QuicStreamId>(id);
if (!QuicUtils::IsBidirectionalStreamId(stream_id, version()) ||
IsIncomingStream(stream_id)) {
CloseConnectionWithDetails(QUIC_HTTP_GOAWAY_INVALID_STREAM_ID,
"GOAWAY with invalid stream ID");
return;
}
// TODO(b/161252736): Cancel client requests with ID larger than |id|.
// If |id| is larger than numeric_limits<QuicStreamId>::max(), then use
// max() instead of downcast value.
}
bool QuicSpdySession::OnStreamsBlockedFrame(
const QuicStreamsBlockedFrame& frame) {
if (!QuicSession::OnStreamsBlockedFrame(frame)) {
return false;
}
// The peer asked for stream space more than this implementation has. Send
// goaway.
if (perspective() == Perspective::IS_SERVER &&
frame.stream_count >= QuicUtils::GetMaxStreamCount()) {
DCHECK_EQ(frame.stream_count, QuicUtils::GetMaxStreamCount());
SendHttp3GoAway(QUIC_PEER_GOING_AWAY, "stream count too large");
}
return true;
}
void QuicSpdySession::SendHttp3GoAway(QuicErrorCode error_code,
const std::string& reason) {
DCHECK_EQ(perspective(), Perspective::IS_SERVER);
DCHECK(VersionUsesHttp3(transport_version()));
if (GetQuicReloadableFlag(quic_encrypted_goaway)) {
QUIC_RELOADABLE_FLAG_COUNT_N(quic_encrypted_goaway, 2, 2);
if (!IsEncryptionEstablished()) {
QUIC_CODE_COUNT(quic_h3_goaway_before_encryption_established);
connection()->CloseConnection(
error_code, reason,
ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
return;
}
}
QuicStreamId stream_id;
if (goaway_with_max_stream_id_) {
stream_id = QuicUtils::GetMaxClientInitiatedBidirectionalStreamId(
transport_version());
if (last_sent_http3_goaway_id_.has_value()) {
if (last_sent_http3_goaway_id_.value() == stream_id) {
// Do not send GOAWAY twice.
return;
}
if (last_sent_http3_goaway_id_.value() < stream_id) {
// A previous GOAWAY frame was sent with smaller stream ID. This is not
// possible, because the only time a GOAWAY frame with non-maximal
// stream ID is sent is right before closing connection.
QUIC_BUG << "GOAWAY frame with smaller ID already sent.";
return;
}
}
} else {
stream_id = GetLargestPeerCreatedStreamId(/*unidirectional = */ false);
if (stream_id == QuicUtils::GetInvalidStreamId(transport_version())) {
// No client-initiated bidirectional streams received yet.
// Send 0 to let client know that all requests can be retried.
stream_id = 0;
} else {
// Tell client that streams starting with the next after the largest
// received one can be retried.
stream_id += QuicUtils::StreamIdDelta(transport_version());
}
if (last_sent_http3_goaway_id_.has_value() &&
last_sent_http3_goaway_id_.value() <= stream_id) {
// MUST not send GOAWAY with identifier larger than previously sent.
// Do not bother sending one with same identifier as before, since
// GOAWAY frames on the control stream are guaranteed to be processed in
// order.
return;
}
}
send_control_stream_->SendGoAway(stream_id);
last_sent_http3_goaway_id_ = stream_id;
}
void QuicSpdySession::SendHttp3Shutdown() {
if (goaway_with_max_stream_id_) {
SendHttp3GoAway(QUIC_PEER_GOING_AWAY, "Server shutdown");
return;
}
DCHECK_EQ(perspective(), Perspective::IS_SERVER);
DCHECK(VersionUsesHttp3(transport_version()));
QuicStreamCount advertised_max_incoming_bidirectional_streams =
GetAdvertisedMaxIncomingBidirectionalStreams();
const QuicStreamId stream_id =
QuicUtils::GetFirstBidirectionalStreamId(transport_version(),
Perspective::IS_CLIENT) +
QuicUtils::StreamIdDelta(transport_version()) *
advertised_max_incoming_bidirectional_streams;
if (last_sent_http3_goaway_id_.has_value() &&
last_sent_http3_goaway_id_.value() < stream_id) {
send_control_stream_->SendGoAway(last_sent_http3_goaway_id_.value());
return;
}
send_control_stream_->SendGoAway(stream_id);
last_sent_http3_goaway_id_ = stream_id;
}
void QuicSpdySession::WritePushPromise(QuicStreamId original_stream_id,
QuicStreamId promised_stream_id,
SpdyHeaderBlock headers) {
if (perspective() == Perspective::IS_CLIENT) {
QUIC_BUG << "Client shouldn't send PUSH_PROMISE";
return;
}
if (!VersionUsesHttp3(transport_version())) {
SpdyPushPromiseIR push_promise(original_stream_id, promised_stream_id,
std::move(headers));
// PUSH_PROMISE must not be the last frame sent out, at least followed by
// response headers.
push_promise.set_fin(false);
SpdySerializedFrame frame(spdy_framer_.SerializeFrame(push_promise));
headers_stream()->WriteOrBufferData(
absl::string_view(frame.data(), frame.size()), false, nullptr);
return;
}
if (!max_push_id_.has_value() || promised_stream_id > max_push_id_.value()) {
QUIC_BUG
<< "Server shouldn't send push id higher than client's MAX_PUSH_ID.";
return;
}
// Encode header list.
std::string encoded_headers =
qpack_encoder_->EncodeHeaderList(original_stream_id, headers, nullptr);
if (debug_visitor_) {
debug_visitor_->OnPushPromiseFrameSent(original_stream_id,
promised_stream_id, headers);
}
PushPromiseFrame frame;
frame.push_id = promised_stream_id;
frame.headers = encoded_headers;
QuicSpdyStream* stream = GetOrCreateSpdyDataStream(original_stream_id);
stream->WritePushPromise(frame);
}
bool QuicSpdySession::server_push_enabled() const {
return VersionUsesHttp3(transport_version())
? ietf_server_push_enabled_ && max_push_id_.has_value()
: server_push_enabled_;
}
void QuicSpdySession::SendInitialData() {
if (!VersionUsesHttp3(transport_version())) {
return;
}
QuicConnection::ScopedPacketFlusher flusher(connection());
send_control_stream_->MaybeSendSettingsFrame();
if (perspective() == Perspective::IS_CLIENT && max_push_id_.has_value() &&
!http3_max_push_id_sent_) {
SendMaxPushId();
}
}
QpackEncoder* QuicSpdySession::qpack_encoder() {
DCHECK(VersionUsesHttp3(transport_version()));
return qpack_encoder_.get();
}
QpackDecoder* QuicSpdySession::qpack_decoder() {
DCHECK(VersionUsesHttp3(transport_version()));
return qpack_decoder_.get();
}
void QuicSpdySession::OnStreamCreated(QuicSpdyStream* stream) {
auto it = buffered_stream_priorities_.find(stream->id());
if (it == buffered_stream_priorities_.end()) {
return;
}
stream->SetPriority(spdy::SpdyStreamPrecedence(it->second));
buffered_stream_priorities_.erase(it);
}
QuicSpdyStream* QuicSpdySession::GetOrCreateSpdyDataStream(
const QuicStreamId stream_id) {
QuicStream* stream = GetOrCreateStream(stream_id);
if (stream && stream->is_static()) {
QUIC_BUG << "GetOrCreateSpdyDataStream returns static stream " << stream_id
<< " in version " << transport_version() << "\n"
<< QuicStackTrace();
connection()->CloseConnection(
QUIC_INVALID_STREAM_ID,
absl::StrCat("stream ", stream_id, " is static"),
ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
return nullptr;
}
return static_cast<QuicSpdyStream*>(stream);
}
void QuicSpdySession::OnNewEncryptionKeyAvailable(
EncryptionLevel level,
std::unique_ptr<QuicEncrypter> encrypter) {
QuicSession::OnNewEncryptionKeyAvailable(level, std::move(encrypter));
if (IsEncryptionEstablished()) {
// Send H3 SETTINGs once encryption is established.
SendInitialData();
}
}
// True if there are open HTTP requests.
bool QuicSpdySession::ShouldKeepConnectionAlive() const {
DCHECK(VersionUsesHttp3(transport_version()) || 0u == pending_streams_size());
return GetNumActiveStreams() + pending_streams_size() > 0;
}
bool QuicSpdySession::UsesPendingStreams() const {
// QuicSpdySession supports PendingStreams, therefore this method should
// eventually just return true. However, pending streams can only be used if
// unidirectional stream type is supported.
return VersionUsesHttp3(transport_version());
}
size_t QuicSpdySession::WriteHeadersOnHeadersStreamImpl(
QuicStreamId id,
spdy::SpdyHeaderBlock headers,
bool fin,
QuicStreamId parent_stream_id,
int weight,
bool exclusive,
QuicReferenceCountedPointer<QuicAckListenerInterface> ack_listener) {
DCHECK(!VersionUsesHttp3(transport_version()));
const QuicByteCount uncompressed_size = headers.TotalBytesUsed();
SpdyHeadersIR headers_frame(id, std::move(headers));
headers_frame.set_fin(fin);
if (perspective() == Perspective::IS_CLIENT) {
headers_frame.set_has_priority(true);
headers_frame.set_parent_stream_id(parent_stream_id);
headers_frame.set_weight(weight);
headers_frame.set_exclusive(exclusive);
}
SpdySerializedFrame frame(spdy_framer_.SerializeFrame(headers_frame));
headers_stream()->WriteOrBufferData(
absl::string_view(frame.data(), frame.size()), false,
std::move(ack_listener));
// Calculate compressed header block size without framing overhead.
QuicByteCount compressed_size = frame.size();
compressed_size -= spdy::kFrameHeaderSize;
if (perspective() == Perspective::IS_CLIENT) {
// Exclusive bit and Stream Dependency are four bytes, weight is one more.
compressed_size -= 5;
}
LogHeaderCompressionRatioHistogram(
/* using_qpack = */ false,
/* is_sent = */ true, compressed_size, uncompressed_size);
return frame.size();
}
void QuicSpdySession::OnPromiseHeaderList(
QuicStreamId /*stream_id*/,
QuicStreamId /*promised_stream_id*/,
size_t /*frame_len*/,
const QuicHeaderList& /*header_list*/) {
std::string error =
"OnPromiseHeaderList should be overridden in client code.";
QUIC_BUG << error;
connection()->CloseConnection(QUIC_INTERNAL_ERROR, error,
ConnectionCloseBehavior::SILENT_CLOSE);
}
bool QuicSpdySession::ResumeApplicationState(ApplicationState* cached_state) {
DCHECK_EQ(perspective(), Perspective::IS_CLIENT);
DCHECK(VersionUsesHttp3(transport_version()));
SettingsFrame out;
if (!HttpDecoder::DecodeSettings(
reinterpret_cast<char*>(cached_state->data()), cached_state->size(),
&out)) {
return false;
}
if (debug_visitor_ != nullptr) {
debug_visitor_->OnSettingsFrameResumed(out);
}
for (const auto& setting : out.values) {
OnSetting(setting.first, setting.second);
}
return true;
}
bool QuicSpdySession::OnSettingsFrame(const SettingsFrame& frame) {
DCHECK(VersionUsesHttp3(transport_version()));
if (debug_visitor_ != nullptr) {
debug_visitor_->OnSettingsFrameReceived(frame);
}
for (const auto& setting : frame.values) {
if (!OnSetting(setting.first, setting.second)) {
return false;
}
}
return true;
}
bool QuicSpdySession::OnSetting(uint64_t id, uint64_t value) {
if (VersionUsesHttp3(transport_version())) {
// SETTINGS frame received on the control stream.
switch (id) {
case SETTINGS_QPACK_MAX_TABLE_CAPACITY: {
QUIC_DVLOG(1)
<< ENDPOINT
<< "SETTINGS_QPACK_MAX_TABLE_CAPACITY received with value "
<< value;
// Communicate |value| to encoder, because it is used for encoding
// Required Insert Count.
bool success = qpack_encoder_->SetMaximumDynamicTableCapacity(value);
if (GetQuicRestartFlag(quic_enable_zero_rtt_for_tls_v2) && !success) {
CloseConnectionWithDetails(
was_zero_rtt_rejected()
? QUIC_HTTP_ZERO_RTT_REJECTION_SETTINGS_MISMATCH
: QUIC_HTTP_ZERO_RTT_RESUMPTION_SETTINGS_MISMATCH,
absl::StrCat(was_zero_rtt_rejected()
? "Server rejected 0-RTT, aborting because "
: "",
"Server sent an SETTINGS_QPACK_MAX_TABLE_CAPACITY: ",
value, "while current value is: ",
qpack_encoder_->MaximumDynamicTableCapacity()));
return false;
}
// However, limit the dynamic table capacity to
// |qpack_maximum_dynamic_table_capacity_|.
qpack_encoder_->SetDynamicTableCapacity(
std::min(value, qpack_maximum_dynamic_table_capacity_));
break;
}
case SETTINGS_MAX_FIELD_SECTION_SIZE:
QUIC_DVLOG(1) << ENDPOINT
<< "SETTINGS_MAX_FIELD_SECTION_SIZE received with value "
<< value;
if (GetQuicRestartFlag(quic_enable_zero_rtt_for_tls_v2) &&
max_outbound_header_list_size_ !=
std::numeric_limits<size_t>::max() &&
max_outbound_header_list_size_ > value) {
CloseConnectionWithDetails(
was_zero_rtt_rejected()
? QUIC_HTTP_ZERO_RTT_REJECTION_SETTINGS_MISMATCH
: QUIC_HTTP_ZERO_RTT_RESUMPTION_SETTINGS_MISMATCH,
absl::StrCat(was_zero_rtt_rejected()
? "Server rejected 0-RTT, aborting because "
: "",
"Server sent an SETTINGS_MAX_FIELD_SECTION_SIZE: ",
value, "which reduces current value: ",
max_outbound_header_list_size_));
return false;
}
max_outbound_header_list_size_ = value;
break;
case SETTINGS_QPACK_BLOCKED_STREAMS: {
QUIC_DVLOG(1) << ENDPOINT
<< "SETTINGS_QPACK_BLOCKED_STREAMS received with value "
<< value;
bool success = qpack_encoder_->SetMaximumBlockedStreams(value);
if (GetQuicRestartFlag(quic_enable_zero_rtt_for_tls_v2) && !success) {
CloseConnectionWithDetails(
was_zero_rtt_rejected()
? QUIC_HTTP_ZERO_RTT_REJECTION_SETTINGS_MISMATCH
: QUIC_HTTP_ZERO_RTT_RESUMPTION_SETTINGS_MISMATCH,
absl::StrCat(was_zero_rtt_rejected()
? "Server rejected 0-RTT, aborting because "
: "",
"Server sent an SETTINGS_QPACK_BLOCKED_STREAMS: ",
value, "which reduces current value: ",
qpack_encoder_->maximum_blocked_streams()));
return false;
}
break;
}
case spdy::SETTINGS_ENABLE_PUSH:
ABSL_FALLTHROUGH_INTENDED;
case spdy::SETTINGS_MAX_CONCURRENT_STREAMS:
ABSL_FALLTHROUGH_INTENDED;
case spdy::SETTINGS_INITIAL_WINDOW_SIZE:
ABSL_FALLTHROUGH_INTENDED;
case spdy::SETTINGS_MAX_FRAME_SIZE:
CloseConnectionWithDetails(
QUIC_HTTP_RECEIVE_SPDY_SETTING,
absl::StrCat("received HTTP/2 specific setting in HTTP/3 session: ",
id));
return false;
default:
QUIC_DVLOG(1) << ENDPOINT << "Unknown setting identifier " << id
<< " received with value " << value;
// Ignore unknown settings.
break;
}
return true;
}
// SETTINGS frame received on the headers stream.
switch (id) {
case spdy::SETTINGS_HEADER_TABLE_SIZE:
QUIC_DVLOG(1) << ENDPOINT
<< "SETTINGS_HEADER_TABLE_SIZE received with value "
<< value;
spdy_framer_.UpdateHeaderEncoderTableSize(value);
break;
case spdy::SETTINGS_ENABLE_PUSH:
if (perspective() == Perspective::IS_SERVER) {
// See rfc7540, Section 6.5.2.
if (value > 1) {
QUIC_DLOG(ERROR) << ENDPOINT << "Invalid value " << value
<< " received for SETTINGS_ENABLE_PUSH.";
if (IsConnected()) {
CloseConnectionWithDetails(
QUIC_INVALID_HEADERS_STREAM_DATA,
absl::StrCat("Invalid value for SETTINGS_ENABLE_PUSH: ",
value));
}
return true;
}
QUIC_DVLOG(1) << ENDPOINT << "SETTINGS_ENABLE_PUSH received with value "
<< value;
server_push_enabled_ = value;
break;
} else {
QUIC_DLOG(ERROR)
<< ENDPOINT
<< "Invalid SETTINGS_ENABLE_PUSH received by client with value "
<< value;
if (IsConnected()) {
CloseConnectionWithDetails(
QUIC_INVALID_HEADERS_STREAM_DATA,
absl::StrCat("Unsupported field of HTTP/2 SETTINGS frame: ", id));
}
}
break;
case spdy::SETTINGS_MAX_HEADER_LIST_SIZE:
QUIC_DVLOG(1) << ENDPOINT
<< "SETTINGS_MAX_HEADER_LIST_SIZE received with value "
<< value;
max_outbound_header_list_size_ = value;
break;
default:
QUIC_DLOG(ERROR) << ENDPOINT << "Unknown setting identifier " << id
<< " received with value " << value;
if (IsConnected()) {
CloseConnectionWithDetails(
QUIC_INVALID_HEADERS_STREAM_DATA,
absl::StrCat("Unsupported field of HTTP/2 SETTINGS frame: ", id));
}
}
return true;
}
bool QuicSpdySession::ShouldReleaseHeadersStreamSequencerBuffer() {
return false;
}
void QuicSpdySession::OnHeaders(SpdyStreamId stream_id,
bool has_priority,
const spdy::SpdyStreamPrecedence& precedence,
bool fin) {
if (has_priority) {
if (perspective() == Perspective::IS_CLIENT) {
CloseConnectionWithDetails(QUIC_INVALID_HEADERS_STREAM_DATA,
"Server must not send priorities.");
return;
}
OnStreamHeadersPriority(stream_id, precedence);
} else {
if (perspective() == Perspective::IS_SERVER) {
CloseConnectionWithDetails(QUIC_INVALID_HEADERS_STREAM_DATA,
"Client must send priorities.");
return;
}
}
DCHECK_EQ(QuicUtils::GetInvalidStreamId(transport_version()), stream_id_);
DCHECK_EQ(QuicUtils::GetInvalidStreamId(transport_version()),
promised_stream_id_);
stream_id_ = stream_id;
fin_ = fin;
}
void QuicSpdySession::OnPushPromise(SpdyStreamId stream_id,
SpdyStreamId promised_stream_id) {
DCHECK_EQ(QuicUtils::GetInvalidStreamId(transport_version()), stream_id_);
DCHECK_EQ(QuicUtils::GetInvalidStreamId(transport_version()),
promised_stream_id_);
stream_id_ = stream_id;
promised_stream_id_ = promised_stream_id;
}
// TODO (wangyix): Why is SpdyStreamId used instead of QuicStreamId?
// This occurs in many places in this file.
void QuicSpdySession::OnPriority(SpdyStreamId stream_id,
const spdy::SpdyStreamPrecedence& precedence) {
if (perspective() == Perspective::IS_CLIENT) {
CloseConnectionWithDetails(QUIC_INVALID_HEADERS_STREAM_DATA,
"Server must not send PRIORITY frames.");
return;
}
OnPriorityFrame(stream_id, precedence);
}
void QuicSpdySession::OnHeaderList(const QuicHeaderList& header_list) {
QUIC_DVLOG(1) << ENDPOINT << "Received header list for stream " << stream_id_
<< ": " << header_list.DebugString();
// This code path is only executed for push promise in IETF QUIC.
if (VersionUsesHttp3(transport_version())) {
DCHECK(promised_stream_id_ !=
QuicUtils::GetInvalidStreamId(transport_version()));
}
if (promised_stream_id_ ==
QuicUtils::GetInvalidStreamId(transport_version())) {
OnStreamHeaderList(stream_id_, fin_, frame_len_, header_list);
} else {
OnPromiseHeaderList(stream_id_, promised_stream_id_, frame_len_,
header_list);
}
// Reset state for the next frame.
promised_stream_id_ = QuicUtils::GetInvalidStreamId(transport_version());
stream_id_ = QuicUtils::GetInvalidStreamId(transport_version());
fin_ = false;
frame_len_ = 0;
}
void QuicSpdySession::OnCompressedFrameSize(size_t frame_len) {
frame_len_ += frame_len;
}
void QuicSpdySession::SetHpackEncoderDebugVisitor(
std::unique_ptr<QuicHpackDebugVisitor> visitor) {
spdy_framer_.SetEncoderHeaderTableDebugVisitor(
std::unique_ptr<HeaderTableDebugVisitor>(new HeaderTableDebugVisitor(
connection()->helper()->GetClock(), std::move(visitor))));
}
void QuicSpdySession::SetHpackDecoderDebugVisitor(
std::unique_ptr<QuicHpackDebugVisitor> visitor) {
h2_deframer_.SetDecoderHeaderTableDebugVisitor(
std::make_unique<HeaderTableDebugVisitor>(
connection()->helper()->GetClock(), std::move(visitor)));
}
void QuicSpdySession::CloseConnectionWithDetails(QuicErrorCode error,
const std::string& details) {
connection()->CloseConnection(
error, details, ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
}
bool QuicSpdySession::HasActiveRequestStreams() const {
return GetNumActiveStreams() + num_draining_streams() > 0;
}
bool QuicSpdySession::ProcessPendingStream(PendingStream* pending) {
DCHECK(VersionUsesHttp3(transport_version()));
DCHECK(connection()->connected());
struct iovec iov;
if (!pending->sequencer()->GetReadableRegion(&iov)) {
// The first byte hasn't been received yet.
return false;
}
QuicDataReader reader(static_cast<char*>(iov.iov_base), iov.iov_len);
uint8_t stream_type_length = reader.PeekVarInt62Length();
uint64_t stream_type = 0;
if (!reader.ReadVarInt62(&stream_type)) {
if (pending->sequencer()->NumBytesBuffered() ==
pending->sequencer()->close_offset()) {
// Stream received FIN but there are not enough bytes for stream type.
// Mark all bytes consumed in order to close stream.
pending->MarkConsumed(pending->sequencer()->close_offset());
}
return false;
}
pending->MarkConsumed(stream_type_length);
switch (stream_type) {
case kControlStream: { // HTTP/3 control stream.
if (receive_control_stream_) {
CloseConnectionOnDuplicateHttp3UnidirectionalStreams("Control");
return false;
}
auto receive_stream =
std::make_unique<QuicReceiveControlStream>(pending, this);
receive_control_stream_ = receive_stream.get();
ActivateStream(std::move(receive_stream));
receive_control_stream_->SetUnblocked();
QUIC_DVLOG(1) << ENDPOINT << "Receive Control stream is created";
if (debug_visitor_ != nullptr) {
debug_visitor_->OnPeerControlStreamCreated(
receive_control_stream_->id());
}
return true;
}
case kServerPushStream: { // Push Stream.
QuicSpdyStream* stream = CreateIncomingStream(pending);
stream->SetUnblocked();
return true;
}
case kQpackEncoderStream: { // QPACK encoder stream.
if (qpack_encoder_receive_stream_) {
CloseConnectionOnDuplicateHttp3UnidirectionalStreams("QPACK encoder");
return false;
}
auto encoder_receive = std::make_unique<QpackReceiveStream>(
pending, this, qpack_decoder_->encoder_stream_receiver());
qpack_encoder_receive_stream_ = encoder_receive.get();
ActivateStream(std::move(encoder_receive));
qpack_encoder_receive_stream_->SetUnblocked();
QUIC_DVLOG(1) << ENDPOINT << "Receive QPACK Encoder stream is created";
if (debug_visitor_ != nullptr) {
debug_visitor_->OnPeerQpackEncoderStreamCreated(
qpack_encoder_receive_stream_->id());
}
return true;
}
case kQpackDecoderStream: { // QPACK decoder stream.
if (qpack_decoder_receive_stream_) {
CloseConnectionOnDuplicateHttp3UnidirectionalStreams("QPACK decoder");
return false;
}
auto decoder_receive = std::make_unique<QpackReceiveStream>(
pending, this, qpack_encoder_->decoder_stream_receiver());
qpack_decoder_receive_stream_ = decoder_receive.get();
ActivateStream(std::move(decoder_receive));
qpack_decoder_receive_stream_->SetUnblocked();
QUIC_DVLOG(1) << ENDPOINT << "Receive QPACK Decoder stream is created";
if (debug_visitor_ != nullptr) {
debug_visitor_->OnPeerQpackDecoderStreamCreated(
qpack_decoder_receive_stream_->id());
}
return true;
}
default:
SendStopSending(QUIC_STREAM_STREAM_CREATION_ERROR, pending->id());
pending->StopReading();
}
return false;
}
void QuicSpdySession::MaybeInitializeHttp3UnidirectionalStreams() {
DCHECK(VersionUsesHttp3(transport_version()));
if (!send_control_stream_ && CanOpenNextOutgoingUnidirectionalStream()) {
auto send_control = std::make_unique<QuicSendControlStream>(
GetNextOutgoingUnidirectionalStreamId(), this, settings_);
send_control_stream_ = send_control.get();
ActivateStream(std::move(send_control));
if (debug_visitor_) {
debug_visitor_->OnControlStreamCreated(send_control_stream_->id());
}
}
if (!qpack_decoder_send_stream_ &&
CanOpenNextOutgoingUnidirectionalStream()) {
auto decoder_send = std::make_unique<QpackSendStream>(
GetNextOutgoingUnidirectionalStreamId(), this, kQpackDecoderStream);
qpack_decoder_send_stream_ = decoder_send.get();
ActivateStream(std::move(decoder_send));
qpack_decoder_->set_qpack_stream_sender_delegate(
qpack_decoder_send_stream_);
if (debug_visitor_) {
debug_visitor_->OnQpackDecoderStreamCreated(
qpack_decoder_send_stream_->id());
}
}
if (!qpack_encoder_send_stream_ &&
CanOpenNextOutgoingUnidirectionalStream()) {
auto encoder_send = std::make_unique<QpackSendStream>(
GetNextOutgoingUnidirectionalStreamId(), this, kQpackEncoderStream);
qpack_encoder_send_stream_ = encoder_send.get();
ActivateStream(std::move(encoder_send));
qpack_encoder_->set_qpack_stream_sender_delegate(
qpack_encoder_send_stream_);
if (debug_visitor_) {
debug_visitor_->OnQpackEncoderStreamCreated(
qpack_encoder_send_stream_->id());
}
}
}
void QuicSpdySession::BeforeConnectionCloseSent() {
if (!GetQuicReloadableFlag(quic_send_goaway_with_connection_close) ||
!VersionUsesHttp3(transport_version()) || !IsEncryptionEstablished()) {
return;
}
DCHECK_EQ(perspective(), Perspective::IS_SERVER);
QUIC_CODE_COUNT(quic_send_goaway_with_connection_close);
QuicStreamId stream_id =
GetLargestPeerCreatedStreamId(/*unidirectional = */ false);
if (stream_id == QuicUtils::GetInvalidStreamId(transport_version())) {
// No client-initiated bidirectional streams received yet.
// Send 0 to let client know that all requests can be retried.
stream_id = 0;
} else {
// Tell client that streams starting with the next after the largest
// received one can be retried.
stream_id += QuicUtils::StreamIdDelta(transport_version());
}
if (last_sent_http3_goaway_id_.has_value() &&
last_sent_http3_goaway_id_.value() <= stream_id) {
if (goaway_with_max_stream_id_) {
// A previous GOAWAY frame was sent with smaller stream ID. This is not
// possible, because this is the only method sending a GOAWAY frame with
// non-maximal stream ID, and this must only be called once, right
// before closing connection.
QUIC_BUG << "GOAWAY frame with smaller ID already sent.";
}
// MUST not send GOAWAY with identifier larger than previously sent.
// Do not bother sending one with same identifier as before, since GOAWAY
// frames on the control stream are guaranteed to be processed in order.
return;
}
send_control_stream_->SendGoAway(stream_id);
last_sent_http3_goaway_id_ = stream_id;
}
void QuicSpdySession::OnCanCreateNewOutgoingStream(bool unidirectional) {
if (unidirectional && VersionUsesHttp3(transport_version())) {
MaybeInitializeHttp3UnidirectionalStreams();
}
}
void QuicSpdySession::SetMaxPushId(PushId max_push_id) {
DCHECK(VersionUsesHttp3(transport_version()));
DCHECK_EQ(Perspective::IS_CLIENT, perspective());
if (max_push_id_.has_value()) {
DCHECK_GE(max_push_id, max_push_id_.value());
}
if (!max_push_id_.has_value() && max_push_id == 0) {
// The default max_push_id is 0. So no need to send out MaxPushId frame.
return;
}
ietf_server_push_enabled_ = true;
if (max_push_id_.has_value()) {
if (max_push_id == max_push_id_.value()) {
QUIC_DVLOG(1) << "Not changing max_push_id: " << max_push_id;
return;
}
QUIC_DVLOG(1) << "Setting max_push_id to: " << max_push_id
<< " from: " << max_push_id_.value();
} else {
QUIC_DVLOG(1) << "Setting max_push_id to: " << max_push_id << " from unset";
}
max_push_id_ = max_push_id;
if (IsEncryptionEstablished()) {
SendMaxPushId();
}
}
bool QuicSpdySession::OnMaxPushIdFrame(PushId max_push_id) {
DCHECK(VersionUsesHttp3(transport_version()));
DCHECK_EQ(Perspective::IS_SERVER, perspective());
if (max_push_id_.has_value()) {
QUIC_DVLOG(1) << "Setting max_push_id to: " << max_push_id
<< " from: " << max_push_id_.value();
} else {
QUIC_DVLOG(1) << "Setting max_push_id to: " << max_push_id
<< " from unset";
}
absl::optional<PushId> old_max_push_id = max_push_id_;
max_push_id_ = max_push_id;
if (!old_max_push_id.has_value() || max_push_id > old_max_push_id.value()) {
OnCanCreateNewOutgoingStream(true);
return true;
}
// Equal value is not considered an error.
if (max_push_id < old_max_push_id.value()) {
CloseConnectionWithDetails(
QUIC_HTTP_INVALID_MAX_PUSH_ID,
absl::StrCat("MAX_PUSH_ID received with value ", max_push_id,
" which is smaller that previously received value ",
old_max_push_id.value()));
return false;
}
return true;
}
void QuicSpdySession::SendMaxPushId() {
DCHECK(VersionUsesHttp3(transport_version()));
DCHECK_EQ(Perspective::IS_CLIENT, perspective());
send_control_stream_->SendMaxPushIdFrame(max_push_id_.value());
http3_max_push_id_sent_ = true;
}
void QuicSpdySession::EnableServerPush() {
DCHECK(VersionUsesHttp3(transport_version()));
DCHECK_EQ(perspective(), Perspective::IS_SERVER);
ietf_server_push_enabled_ = true;
}
bool QuicSpdySession::goaway_received() const {
return VersionUsesHttp3(transport_version())
? last_received_http3_goaway_id_.has_value()
: transport_goaway_received();
}
bool QuicSpdySession::goaway_sent() const {
return VersionUsesHttp3(transport_version())
? last_sent_http3_goaway_id_.has_value()
: transport_goaway_sent();
}
bool QuicSpdySession::CanCreatePushStreamWithId(PushId push_id) {
DCHECK(VersionUsesHttp3(transport_version()));
return ietf_server_push_enabled_ && max_push_id_.has_value() &&
max_push_id_.value() >= push_id;
}
void QuicSpdySession::CloseConnectionOnDuplicateHttp3UnidirectionalStreams(
absl::string_view type) {
QUIC_PEER_BUG << absl::StrCat("Received a duplicate ", type,
" stream: Closing connection.");
CloseConnectionWithDetails(QUIC_HTTP_DUPLICATE_UNIDIRECTIONAL_STREAM,
absl::StrCat(type, " stream is received twice."));
}
// static
void QuicSpdySession::LogHeaderCompressionRatioHistogram(
bool using_qpack,
bool is_sent,
QuicByteCount compressed,
QuicByteCount uncompressed) {
if (compressed <= 0 || uncompressed <= 0) {
return;
}
int ratio = 100 * (compressed) / (uncompressed);
if (ratio < 1) {
ratio = 1;
} else if (ratio > 200) {
ratio = 200;
}
// Note that when using histogram macros in Chromium, the histogram name must
// be the same across calls for any given call site.
if (using_qpack) {
if (is_sent) {
QUIC_HISTOGRAM_COUNTS("QuicSession.HeaderCompressionRatioQpackSent",
ratio, 1, 200, 200,
"Header compression ratio as percentage for sent "
"headers using QPACK.");
} else {
QUIC_HISTOGRAM_COUNTS("QuicSession.HeaderCompressionRatioQpackReceived",
ratio, 1, 200, 200,
"Header compression ratio as percentage for "
"received headers using QPACK.");
}
} else {
if (is_sent) {
QUIC_HISTOGRAM_COUNTS("QuicSession.HeaderCompressionRatioHpackSent",
ratio, 1, 200, 200,
"Header compression ratio as percentage for sent "
"headers using HPACK.");
} else {
QUIC_HISTOGRAM_COUNTS("QuicSession.HeaderCompressionRatioHpackReceived",
ratio, 1, 200, 200,
"Header compression ratio as percentage for "
"received headers using HPACK.");
}
}
}
#undef ENDPOINT // undef for jumbo builds
} // namespace quic