| // 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 "quiche/quic/core/http/quic_spdy_session.h" |
| |
| #include <algorithm> |
| #include <cstdint> |
| #include <limits> |
| #include <memory> |
| #include <optional> |
| #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 "quiche/quic/core/http/http_constants.h" |
| #include "quiche/quic/core/http/http_decoder.h" |
| #include "quiche/quic/core/http/http_frames.h" |
| #include "quiche/quic/core/http/quic_headers_stream.h" |
| #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" |
| #include "quiche/quic/platform/api/quic_bug_tracker.h" |
| #include "quiche/quic/platform/api/quic_exported_stats.h" |
| #include "quiche/quic/platform/api/quic_flag_utils.h" |
| #include "quiche/quic/platform/api/quic_flags.h" |
| #include "quiche/quic/platform/api/quic_logging.h" |
| #include "quiche/quic/platform/api/quic_stack_trace.h" |
| #include "quiche/common/platform/api/quiche_mem_slice.h" |
| #include "quiche/spdy/core/http2_frame_decoder_adapter.h" |
| |
| using http2::Http2DecoderAdapter; |
| using spdy::Http2HeaderBlock; |
| using spdy::Http2WeightToSpdy3Priority; |
| using spdy::Spdy3PriorityToHttp2Weight; |
| using spdy::SpdyErrorCode; |
| using spdy::SpdyFramer; |
| using spdy::SpdyFramerDebugVisitorInterface; |
| using spdy::SpdyFramerVisitorInterface; |
| using spdy::SpdyFrameType; |
| using spdy::SpdyHeadersHandlerInterface; |
| using spdy::SpdyHeadersIR; |
| using spdy::SpdyPingId; |
| using spdy::SpdyPriority; |
| using spdy::SpdyPriorityIR; |
| using spdy::SpdySerializedFrame; |
| using spdy::SpdySettingsId; |
| using spdy::SpdyStreamId; |
| |
| namespace quic { |
| |
| ABSL_CONST_INIT const size_t kMaxUnassociatedWebTransportStreams = 24; |
| |
| namespace { |
| |
| // Limit on HPACK encoder dynamic table size. |
| // Only used for Google QUIC, not IETF QUIC. |
| constexpr uint64_t kHpackEncoderDynamicTableSizeLimit = 16384; |
| |
| constexpr QuicStreamCount kDefaultMaxWebTransportSessions = 16; |
| |
| #define ENDPOINT \ |
| (perspective() == Perspective::IS_SERVER ? "Server: " : "Client: ") |
| |
| // Class to forward ACCEPT_CH frame to QuicSpdySession, |
| // and ignore every other frame. |
| class AlpsFrameDecoder : public HttpDecoder::Visitor { |
| public: |
| explicit AlpsFrameDecoder(QuicSpdySession* session) : session_(session) {} |
| ~AlpsFrameDecoder() override = default; |
| |
| // HttpDecoder::Visitor implementation. |
| void OnError(HttpDecoder* /*decoder*/) override {} |
| bool OnMaxPushIdFrame() override { |
| error_detail_ = "MAX_PUSH_ID frame forbidden"; |
| return false; |
| } |
| bool OnGoAwayFrame(const GoAwayFrame& /*frame*/) override { |
| error_detail_ = "GOAWAY frame forbidden"; |
| return false; |
| } |
| bool OnSettingsFrameStart(QuicByteCount /*header_length*/) override { |
| return true; |
| } |
| bool OnSettingsFrame(const SettingsFrame& frame) override { |
| if (settings_frame_received_via_alps_) { |
| error_detail_ = "multiple SETTINGS frames"; |
| return false; |
| } |
| |
| settings_frame_received_via_alps_ = true; |
| |
| error_detail_ = session_->OnSettingsFrameViaAlps(frame); |
| return !error_detail_; |
| } |
| bool OnDataFrameStart(QuicByteCount /*header_length*/, QuicByteCount |
| /*payload_length*/) override { |
| error_detail_ = "DATA frame forbidden"; |
| return false; |
| } |
| bool OnDataFramePayload(absl::string_view /*payload*/) override { |
| QUICHE_NOTREACHED(); |
| return false; |
| } |
| bool OnDataFrameEnd() override { |
| QUICHE_NOTREACHED(); |
| return false; |
| } |
| bool OnHeadersFrameStart(QuicByteCount /*header_length*/, |
| QuicByteCount /*payload_length*/) override { |
| error_detail_ = "HEADERS frame forbidden"; |
| return false; |
| } |
| bool OnHeadersFramePayload(absl::string_view /*payload*/) override { |
| QUICHE_NOTREACHED(); |
| return false; |
| } |
| bool OnHeadersFrameEnd() override { |
| QUICHE_NOTREACHED(); |
| return false; |
| } |
| bool OnPriorityUpdateFrameStart(QuicByteCount /*header_length*/) override { |
| error_detail_ = "PRIORITY_UPDATE frame forbidden"; |
| return false; |
| } |
| bool OnPriorityUpdateFrame(const PriorityUpdateFrame& /*frame*/) override { |
| QUICHE_NOTREACHED(); |
| return false; |
| } |
| bool OnAcceptChFrameStart(QuicByteCount /*header_length*/) override { |
| return true; |
| } |
| bool OnAcceptChFrame(const AcceptChFrame& frame) override { |
| session_->OnAcceptChFrameReceivedViaAlps(frame); |
| return true; |
| } |
| void OnWebTransportStreamFrameType( |
| QuicByteCount /*header_length*/, |
| WebTransportSessionId /*session_id*/) override { |
| QUICHE_NOTREACHED(); |
| } |
| bool OnUnknownFrameStart(uint64_t /*frame_type*/, |
| QuicByteCount |
| /*header_length*/, |
| QuicByteCount /*payload_length*/) override { |
| return true; |
| } |
| bool OnUnknownFramePayload(absl::string_view /*payload*/) override { |
| return true; |
| } |
| bool OnUnknownFrameEnd() override { return true; } |
| |
| const std::optional<std::string>& error_detail() const { |
| return error_detail_; |
| } |
| |
| private: |
| QuicSpdySession* const session_; |
| std::optional<std::string> error_detail_; |
| |
| // True if SETTINGS frame has been received via ALPS. |
| bool settings_frame_received_via_alps_ = false; |
| }; |
| |
| uint64_t GetDefaultQpackMaximumDynamicTableCapacity(Perspective perspective) { |
| if (perspective == Perspective::IS_SERVER && |
| GetQuicFlag(quic_server_disable_qpack_dynamic_table)) { |
| return 0; |
| } |
| |
| return kDefaultQpackMaxDynamicTableCapacity; |
| } |
| |
| } // 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 { |
| QUICHE_DCHECK(!VersionUsesHttp3(session_->transport_version())); |
| return &header_list_; |
| } |
| |
| void OnHeaderFrameEnd(SpdyStreamId /* stream_id */) override { |
| QUICHE_DCHECK(!VersionUsesHttp3(session_->transport_version())); |
| |
| LogHeaderCompressionRatioHistogram( |
| /* using_qpack = */ false, |
| /* is_sent = */ false, header_list_.compressed_header_bytes(), |
| header_list_.uncompressed_header_bytes()); |
| |
| // Ignore pushed request headers. |
| if (session_->IsConnected() && !expecting_pushed_headers_) { |
| session_->OnHeaderList(header_list_); |
| } |
| expecting_pushed_headers_ = false; |
| header_list_.Clear(); |
| } |
| |
| void OnStreamFrameData(SpdyStreamId /*stream_id*/, const char* /*data*/, |
| size_t /*len*/) override { |
| QUICHE_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 { |
| QUICHE_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 { |
| QUICHE_DCHECK(!VersionUsesHttp3(session_->transport_version())); |
| session_->OnSetting(id, value); |
| } |
| |
| void OnSettingsEnd() override { |
| QUICHE_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, size_t /*payload_length*/, |
| 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(quic_bug_12477_1, |
| session_->destruction_indicator() != 123456789) |
| << "QuicSpdyStream use after free. " |
| << session_->destruction_indicator() << QuicStackTrace(); |
| |
| 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 { |
| QUICHE_DCHECK(!VersionUsesHttp3(session_->transport_version())); |
| if (session_->perspective() != Perspective::IS_CLIENT) { |
| // PUSH_PROMISE sent by a client is a protocol violation. |
| CloseConnection("PUSH_PROMISE not supported.", |
| QUIC_INVALID_HEADERS_STREAM_DATA); |
| return; |
| } |
| |
| // Push streams are ignored anyway, reset the stream to save bandwidth. |
| session_->MaybeSendRstStreamFrame( |
| promised_stream_id, |
| QuicResetStreamError::FromInternal(QUIC_REFUSED_STREAM), |
| /* bytes_written = */ 0); |
| |
| QUICHE_DCHECK(!expecting_pushed_headers_); |
| expecting_pushed_headers_ = true; |
| } |
| |
| void OnContinuation(SpdyStreamId /*stream_id*/, size_t /*payload_size*/, |
| bool /*end*/) override {} |
| |
| void OnPriority(SpdyStreamId stream_id, SpdyStreamId /* parent_id */, |
| int weight, bool /* exclusive */) override { |
| QUICHE_DCHECK(!VersionUsesHttp3(session_->transport_version())); |
| if (!session_->IsConnected()) { |
| return; |
| } |
| SpdyPriority priority = Http2WeightToSpdy3Priority(weight); |
| session_->OnPriority(stream_id, spdy::SpdyStreamPrecedence(priority)); |
| } |
| |
| void OnPriorityUpdate(SpdyStreamId /*prioritized_stream_id*/, |
| absl::string_view /*priority_field_value*/) override {} |
| |
| bool OnUnknownFrame(SpdyStreamId /*stream_id*/, |
| uint8_t /*frame_type*/) override { |
| CloseConnection("Unknown frame type received.", |
| QUIC_INVALID_HEADERS_STREAM_DATA); |
| return false; |
| } |
| |
| void OnUnknownFrameStart(SpdyStreamId /*stream_id*/, size_t /*length*/, |
| uint8_t /*type*/, uint8_t /*flags*/) override {} |
| |
| void OnUnknownFramePayload(SpdyStreamId /*stream_id*/, |
| absl::string_view /*payload*/) override {} |
| |
| // SpdyFramerDebugVisitorInterface implementation |
| void OnSendCompressedFrame(SpdyStreamId /*stream_id*/, SpdyFrameType /*type*/, |
| size_t payload_len, size_t frame_len) override { |
| if (payload_len == 0) { |
| QUIC_BUG(quic_bug_10360_1) << "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_; |
| |
| // True if the next OnHeaderFrameEnd() call signals the end of pushed request |
| // headers. |
| bool expecting_pushed_headers_ = false; |
| }; |
| |
| 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()) |
| ? static_cast<QuicStreamCount>( |
| kHttp3StaticUnidirectionalStreamCount) |
| : 0u, |
| std::make_unique<DatagramObserver>(this)), |
| 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_( |
| GetDefaultQpackMaximumDynamicTableCapacity(perspective())), |
| 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())), |
| frame_len_(0), |
| fin_(false), |
| spdy_framer_(SpdyFramer::ENABLE_COMPRESSION), |
| spdy_framer_visitor_(new SpdyFramerVisitor(this)), |
| debug_visitor_(nullptr), |
| destruction_indicator_(123456789), |
| allow_extended_connect_(perspective() == Perspective::IS_SERVER && |
| VersionUsesHttp3(transport_version())), |
| force_buffer_requests_until_settings_(false) { |
| 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(quic_bug_12477_2, destruction_indicator_ != 123456789) |
| << "QuicSpdySession 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(); |
| QUICHE_DCHECK_EQ(headers_stream_id, |
| QuicUtils::GetHeadersStreamId(transport_version())); |
| } |
| auto headers_stream = std::make_unique<QuicHeadersStream>((this)); |
| QUICHE_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_; |
| if (version().UsesHttp3()) { |
| switch (LocalHttpDatagramSupport()) { |
| case HttpDatagramSupport::kNone: |
| break; |
| case HttpDatagramSupport::kDraft04: |
| settings_.values[SETTINGS_H3_DATAGRAM_DRAFT04] = 1; |
| break; |
| case HttpDatagramSupport::kRfc: |
| settings_.values[SETTINGS_H3_DATAGRAM] = 1; |
| break; |
| case HttpDatagramSupport::kRfcAndDraft04: |
| settings_.values[SETTINGS_H3_DATAGRAM] = 1; |
| settings_.values[SETTINGS_H3_DATAGRAM_DRAFT04] = 1; |
| break; |
| } |
| } |
| if (WillNegotiateWebTransport()) { |
| WebTransportHttp3VersionSet versions = |
| LocallySupportedWebTransportVersions(); |
| if (versions.IsSet(WebTransportHttp3Version::kDraft02)) { |
| settings_.values[SETTINGS_WEBTRANS_DRAFT00] = 1; |
| } |
| if (versions.IsSet(WebTransportHttp3Version::kDraft07)) { |
| QUICHE_BUG_IF( |
| WT_enabled_extended_connect_disabled, |
| perspective() == Perspective::IS_SERVER && !allow_extended_connect()) |
| << "WebTransport enabled, but extended CONNECT is not"; |
| settings_.values[SETTINGS_WEBTRANS_MAX_SESSIONS_DRAFT07] = |
| kDefaultMaxWebTransportSessions; |
| } |
| } |
| if (allow_extended_connect()) { |
| settings_.values[SETTINGS_ENABLE_CONNECT_PROTOCOL] = 1; |
| } |
| } |
| |
| void QuicSpdySession::OnDecoderStreamError(QuicErrorCode error_code, |
| absl::string_view error_message) { |
| QUICHE_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) { |
| QUICHE_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, HttpStreamPriority priority) { |
| 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, QuicStreamPriority(priority))) { |
| return true; |
| } |
| |
| if (IsClosedStream(stream_id)) { |
| return true; |
| } |
| |
| buffered_stream_priorities_[stream_id] = priority; |
| |
| 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(quic_bug_10360_2) << error_message; |
| connection()->CloseConnection( |
| QUIC_INTERNAL_ERROR, error_message, |
| ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| size_t QuicSpdySession::ProcessHeaderData(const struct iovec& iov) { |
| QUIC_BUG_IF(quic_bug_12477_4, 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, Http2HeaderBlock headers, bool fin, |
| const spdy::SpdyStreamPrecedence& precedence, |
| quiche::QuicheReferenceCountedPointer<QuicAckListenerInterface> |
| ack_listener) { |
| QUICHE_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 stream_id, |
| QuicStreamId parent_stream_id, int weight, |
| bool exclusive) { |
| QUICHE_DCHECK(!VersionUsesHttp3(transport_version())); |
| SpdyPriorityIR priority_frame(stream_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(QuicStreamId stream_id, |
| HttpStreamPriority priority) { |
| QUICHE_DCHECK(VersionUsesHttp3(transport_version())); |
| |
| send_control_stream_->WritePriorityUpdate(stream_id, priority); |
| } |
| |
| void QuicSpdySession::OnHttp3GoAway(uint64_t id) { |
| QUIC_BUG_IF(quic_bug_12477_5, !version().UsesHttp3()) |
| << "HTTP/3 GOAWAY received on version " << version(); |
| |
| if (last_received_http3_goaway_id_.has_value() && |
| id > *last_received_http3_goaway_id_) { |
| 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_)); |
| 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; |
| } |
| |
| if (SupportsWebTransport()) { |
| PerformActionOnActiveStreams([](QuicStream* stream) { |
| if (!QuicUtils::IsBidirectionalStreamId(stream->id(), |
| stream->version()) || |
| !QuicUtils::IsClientInitiatedStreamId( |
| stream->version().transport_version, stream->id())) { |
| return true; |
| } |
| QuicSpdyStream* spdy_stream = static_cast<QuicSpdyStream*>(stream); |
| WebTransportHttp3* web_transport = spdy_stream->web_transport(); |
| if (web_transport == nullptr) { |
| return true; |
| } |
| web_transport->OnGoAwayReceived(); |
| return true; |
| }); |
| } |
| |
| // 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()) { |
| QUICHE_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) { |
| QUICHE_DCHECK(VersionUsesHttp3(transport_version())); |
| if (!IsEncryptionEstablished()) { |
| QUIC_CODE_COUNT(quic_h3_goaway_before_encryption_established); |
| connection()->CloseConnection( |
| error_code, reason, |
| ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET); |
| return; |
| } |
| ietf_streamid_manager().StopIncreasingIncomingMaxStreams(); |
| |
| QuicStreamId stream_id = |
| QuicUtils::GetMaxClientInitiatedBidirectionalStreamId( |
| transport_version()); |
| if (last_sent_http3_goaway_id_.has_value() && |
| *last_sent_http3_goaway_id_ <= stream_id) { |
| // Do not send GOAWAY frame with a higher id, because it is forbidden. |
| // Do not send one with same stream id as before, since 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::SendInitialData() { |
| if (!VersionUsesHttp3(transport_version())) { |
| return; |
| } |
| QuicConnection::ScopedPacketFlusher flusher(connection()); |
| send_control_stream_->MaybeSendSettingsFrame(); |
| } |
| |
| bool QuicSpdySession::CheckStreamWriteBlocked(QuicStream* stream) const { |
| if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data3) && |
| 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())); |
| |
| return qpack_encoder_.get(); |
| } |
| |
| QpackDecoder* QuicSpdySession::qpack_decoder() { |
| QUICHE_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(QuicStreamPriority(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(quic_bug_10360_5) |
| << "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(); |
| } |
| } |
| |
| bool QuicSpdySession::ShouldNegotiateWebTransport() const { |
| return LocallySupportedWebTransportVersions().Any(); |
| } |
| |
| WebTransportHttp3VersionSet |
| QuicSpdySession::LocallySupportedWebTransportVersions() const { |
| return WebTransportHttp3VersionSet(); |
| } |
| |
| bool QuicSpdySession::WillNegotiateWebTransport() { |
| return LocalHttpDatagramSupport() != HttpDatagramSupport::kNone && |
| version().UsesHttp3() && ShouldNegotiateWebTransport(); |
| } |
| |
| // True if there are open HTTP requests. |
| bool QuicSpdySession::ShouldKeepConnectionAlive() const { |
| QUICHE_DCHECK(VersionUsesHttp3(transport_version()) || |
| 0u == pending_streams_size()); |
| return GetNumActiveStreams() + pending_streams_size() > 0; |
| } |
| |
| bool QuicSpdySession::UsesPendingStreamForFrame(QuicFrameType type, |
| QuicStreamId stream_id) const { |
| // Pending streams can only be used to handle unidirectional stream with |
| // STREAM & RESET_STREAM frames in IETF QUIC. |
| return VersionUsesHttp3(transport_version()) && |
| (type == STREAM_FRAME || type == RST_STREAM_FRAME) && |
| QuicUtils::GetStreamType(stream_id, perspective(), |
| IsIncomingStream(stream_id), |
| version()) == READ_UNIDIRECTIONAL; |
| } |
| |
| size_t QuicSpdySession::WriteHeadersOnHeadersStreamImpl( |
| QuicStreamId id, spdy::Http2HeaderBlock headers, bool fin, |
| QuicStreamId parent_stream_id, int weight, bool exclusive, |
| quiche::QuicheReferenceCountedPointer<QuicAckListenerInterface> |
| ack_listener) { |
| QUICHE_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(); |
| } |
| |
| bool QuicSpdySession::ResumeApplicationState(ApplicationState* cached_state) { |
| QUICHE_DCHECK_EQ(perspective(), Perspective::IS_CLIENT); |
| QUICHE_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); |
| } |
| QUICHE_DCHECK(streams_waiting_for_settings_.empty()); |
| for (const auto& setting : out.values) { |
| OnSetting(setting.first, setting.second); |
| } |
| return true; |
| } |
| |
| std::optional<std::string> QuicSpdySession::OnAlpsData(const uint8_t* alps_data, |
| size_t alps_length) { |
| AlpsFrameDecoder alps_frame_decoder(this); |
| HttpDecoder decoder(&alps_frame_decoder); |
| decoder.ProcessInput(reinterpret_cast<const char*>(alps_data), alps_length); |
| if (alps_frame_decoder.error_detail()) { |
| return alps_frame_decoder.error_detail(); |
| } |
| |
| if (decoder.error() != QUIC_NO_ERROR) { |
| return decoder.error_detail(); |
| } |
| |
| if (!decoder.AtFrameBoundary()) { |
| return "incomplete HTTP/3 frame"; |
| } |
| |
| return std::nullopt; |
| } |
| |
| void QuicSpdySession::OnAcceptChFrameReceivedViaAlps( |
| const AcceptChFrame& frame) { |
| if (debug_visitor_) { |
| debug_visitor_->OnAcceptChFrameReceivedViaAlps(frame); |
| } |
| } |
| |
| bool QuicSpdySession::OnSettingsFrame(const SettingsFrame& frame) { |
| QUICHE_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; |
| } |
| } |
| |
| if (!ValidateWebTransportSettingsConsistency()) { |
| return false; |
| } |
| |
| // This is the last point in the connection when we can receive new SETTINGS |
| // values (ALPS and settings from the session ticket come before, and only one |
| // SETTINGS frame per connection is allowed). Notify all the streams that are |
| // blocking on having the definitive settings list. |
| QUICHE_DCHECK(!settings_received_); |
| settings_received_ = true; |
| for (QuicStreamId stream_id : streams_waiting_for_settings_) { |
| QUICHE_RELOADABLE_FLAG_COUNT_N(quic_block_until_settings_received_copt, 4, |
| 4); |
| QUICHE_DCHECK(ShouldBufferRequestsUntilSettings()); |
| QuicSpdyStream* stream = GetOrCreateSpdyDataStream(stream_id); |
| if (stream == nullptr) { |
| // The stream may no longer exist, since it is possible for a stream to |
| // get reset while waiting for the SETTINGS frame. |
| continue; |
| } |
| stream->OnDataAvailable(); |
| } |
| streams_waiting_for_settings_.clear(); |
| |
| return true; |
| } |
| |
| bool QuicSpdySession::ValidateWebTransportSettingsConsistency() { |
| // Only apply the following checks to draft-07 or later. |
| std::optional<WebTransportHttp3Version> version = |
| NegotiatedWebTransportVersion(); |
| if (!version.has_value() || *version == WebTransportHttp3Version::kDraft02) { |
| return true; |
| } |
| |
| if (!allow_extended_connect_) { |
| CloseConnectionWithDetails( |
| QUIC_HTTP_INVALID_SETTING_VALUE, |
| "Negotiated use of WebTransport over HTTP/3 (draft-07 or later), but " |
| "failed to negotiate extended CONNECT"); |
| return false; |
| } |
| |
| if (http_datagram_support_ == HttpDatagramSupport::kDraft04) { |
| CloseConnectionWithDetails( |
| QUIC_HTTP_INVALID_SETTING_VALUE, |
| "WebTransport over HTTP/3 version draft-07 and beyond requires the " |
| "RFC version of HTTP datagrams"); |
| return false; |
| } |
| |
| if (http_datagram_support_ != HttpDatagramSupport::kRfc) { |
| CloseConnectionWithDetails( |
| QUIC_HTTP_INVALID_SETTING_VALUE, |
| "WebTransport over HTTP/3 requires HTTP datagrams support"); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| std::optional<std::string> QuicSpdySession::OnSettingsFrameViaAlps( |
| const SettingsFrame& frame) { |
| QUICHE_DCHECK(VersionUsesHttp3(transport_version())); |
| |
| if (debug_visitor_ != nullptr) { |
| debug_visitor_->OnSettingsFrameReceivedViaAlps(frame); |
| } |
| for (const auto& setting : frame.values) { |
| if (!OnSetting(setting.first, setting.second)) { |
| // Do not bother adding the setting identifier or value to the error |
| // message, because OnSetting() already closed the connection, therefore |
| // the error message will be ignored. |
| return "error parsing setting"; |
| } |
| } |
| return std::nullopt; |
| } |
| |
| bool QuicSpdySession::VerifySettingIsZeroOrOne(uint64_t id, uint64_t value) { |
| if (value == 0 || value == 1) { |
| return true; |
| } |
| std::string error_details = absl::StrCat( |
| "Received ", |
| H3SettingsToString(static_cast<Http3AndQpackSettingsIdentifiers>(id)), |
| " with invalid value ", value); |
| QUIC_PEER_BUG(bad received setting) << ENDPOINT << error_details; |
| CloseConnectionWithDetails(QUIC_HTTP_INVALID_SETTING_VALUE, error_details); |
| return false; |
| } |
| |
| 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. |
| if (!qpack_encoder_->SetMaximumDynamicTableCapacity(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_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 (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; |
| if (!qpack_encoder_->SetMaximumBlockedStreams(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_QPACK_BLOCKED_STREAMS: ", |
| value, " which reduces current value: ", |
| qpack_encoder_->maximum_blocked_streams())); |
| return false; |
| } |
| break; |
| } |
| case SETTINGS_ENABLE_CONNECT_PROTOCOL: { |
| QUIC_DVLOG(1) << ENDPOINT |
| << "SETTINGS_ENABLE_CONNECT_PROTOCOL received with value " |
| << value; |
| if (!VerifySettingIsZeroOrOne(id, value)) { |
| return false; |
| } |
| if (perspective() == Perspective::IS_CLIENT) { |
| allow_extended_connect_ = value != 0; |
| } |
| 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; |
| case SETTINGS_H3_DATAGRAM_DRAFT04: { |
| HttpDatagramSupport local_http_datagram_support = |
| LocalHttpDatagramSupport(); |
| if (local_http_datagram_support != HttpDatagramSupport::kDraft04 && |
| local_http_datagram_support != |
| HttpDatagramSupport::kRfcAndDraft04) { |
| break; |
| } |
| QUIC_DVLOG(1) << ENDPOINT |
| << "SETTINGS_H3_DATAGRAM_DRAFT04 received with value " |
| << value; |
| if (!version().UsesHttp3()) { |
| break; |
| } |
| if (!VerifySettingIsZeroOrOne(id, value)) { |
| return false; |
| } |
| if (value && http_datagram_support_ != HttpDatagramSupport::kRfc) { |
| // If both RFC 9297 and draft-04 are supported, we use the RFC. This |
| // is implemented by ignoring SETTINGS_H3_DATAGRAM_DRAFT04 when we've |
| // already parsed SETTINGS_H3_DATAGRAM. |
| http_datagram_support_ = HttpDatagramSupport::kDraft04; |
| } |
| break; |
| } |
| case SETTINGS_H3_DATAGRAM: { |
| HttpDatagramSupport local_http_datagram_support = |
| LocalHttpDatagramSupport(); |
| if (local_http_datagram_support != HttpDatagramSupport::kRfc && |
| local_http_datagram_support != |
| HttpDatagramSupport::kRfcAndDraft04) { |
| break; |
| } |
| QUIC_DVLOG(1) << ENDPOINT << "SETTINGS_H3_DATAGRAM received with value " |
| << value; |
| if (!version().UsesHttp3()) { |
| break; |
| } |
| if (!VerifySettingIsZeroOrOne(id, value)) { |
| return false; |
| } |
| if (value) { |
| http_datagram_support_ = HttpDatagramSupport::kRfc; |
| } |
| break; |
| } |
| case SETTINGS_WEBTRANS_DRAFT00: |
| if (!WillNegotiateWebTransport()) { |
| break; |
| } |
| QUIC_DVLOG(1) << ENDPOINT |
| << "SETTINGS_ENABLE_WEBTRANSPORT(02) received with value " |
| << value; |
| if (!VerifySettingIsZeroOrOne(id, value)) { |
| return false; |
| } |
| if (value == 1) { |
| peer_web_transport_versions_.Set(WebTransportHttp3Version::kDraft02); |
| if (perspective() == Perspective::IS_CLIENT) { |
| allow_extended_connect_ = true; |
| } |
| } |
| break; |
| case SETTINGS_WEBTRANS_MAX_SESSIONS_DRAFT07: |
| if (!WillNegotiateWebTransport()) { |
| break; |
| } |
| QUIC_DVLOG(1) |
| << ENDPOINT |
| << "SETTINGS_WEBTRANS_MAX_SESSIONS_DRAFT07 received with value " |
| << value; |
| if (value > 0) { |
| peer_web_transport_versions_.Set(WebTransportHttp3Version::kDraft07); |
| if (perspective() == Perspective::IS_CLIENT) { |
| max_webtransport_sessions_[WebTransportHttp3Version::kDraft07] = |
| value; |
| } |
| } |
| break; |
| 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( |
| std::min<uint64_t>(value, kHpackEncoderDynamicTableSizeLimit)); |
| 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 << ", ignoring."; |
| 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; |
| } |
| } |
| QUICHE_DCHECK_EQ(QuicUtils::GetInvalidStreamId(transport_version()), |
| stream_id_); |
| stream_id_ = stream_id; |
| fin_ = fin; |
| } |
| |
| // 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(); |
| QUICHE_DCHECK(!VersionUsesHttp3(transport_version())); |
| |
| OnStreamHeaderList(stream_id_, fin_, frame_len_, header_list); |
| |
| // Reset state for the next frame. |
| stream_id_ = QuicUtils::GetInvalidStreamId(transport_version()); |
| fin_ = false; |
| frame_len_ = 0; |
| } |
| |
| void QuicSpdySession::OnCompressedFrameSize(size_t frame_len) { |
| frame_len_ += frame_len; |
| } |
| |
| 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; |
| } |
| |
| QuicStream* QuicSpdySession::ProcessReadUnidirectionalPendingStream( |
| PendingStream* pending) { |
| struct iovec iov; |
| if (!pending->sequencer()->GetReadableRegion(&iov)) { |
| // The first byte hasn't been received yet. |
| return nullptr; |
| } |
| |
| 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 nullptr; |
| } |
| pending->MarkConsumed(stream_type_length); |
| |
| switch (stream_type) { |
| case kControlStream: { // HTTP/3 control stream. |
| if (receive_control_stream_) { |
| CloseConnectionOnDuplicateHttp3UnidirectionalStreams("Control"); |
| return nullptr; |
| } |
| auto receive_stream = |
| std::make_unique<QuicReceiveControlStream>(pending, this); |
| receive_control_stream_ = receive_stream.get(); |
| ActivateStream(std::move(receive_stream)); |
| QUIC_DVLOG(1) << ENDPOINT << "Receive Control stream is created"; |
| if (debug_visitor_ != nullptr) { |
| debug_visitor_->OnPeerControlStreamCreated( |
| receive_control_stream_->id()); |
| } |
| return receive_control_stream_; |
| } |
| case kServerPushStream: { // Push Stream. |
| CloseConnectionWithDetails(QUIC_HTTP_RECEIVE_SERVER_PUSH, |
| "Received server push stream"); |
| return nullptr; |
| } |
| case kQpackEncoderStream: { // QPACK encoder stream. |
| if (qpack_encoder_receive_stream_) { |
| CloseConnectionOnDuplicateHttp3UnidirectionalStreams("QPACK encoder"); |
| return nullptr; |
| } |
| 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)); |
| QUIC_DVLOG(1) << ENDPOINT << "Receive QPACK Encoder stream is created"; |
| if (debug_visitor_ != nullptr) { |
| debug_visitor_->OnPeerQpackEncoderStreamCreated( |
| qpack_encoder_receive_stream_->id()); |
| } |
| return qpack_encoder_receive_stream_; |
| } |
| case kQpackDecoderStream: { // QPACK decoder stream. |
| if (qpack_decoder_receive_stream_) { |
| CloseConnectionOnDuplicateHttp3UnidirectionalStreams("QPACK decoder"); |
| return nullptr; |
| } |
| 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)); |
| QUIC_DVLOG(1) << ENDPOINT << "Receive QPACK Decoder stream is created"; |
| if (debug_visitor_ != nullptr) { |
| debug_visitor_->OnPeerQpackDecoderStreamCreated( |
| qpack_decoder_receive_stream_->id()); |
| } |
| return qpack_decoder_receive_stream_; |
| } |
| case kWebTransportUnidirectionalStream: { |
| // Note that this checks whether WebTransport is enabled on the receiver |
| // side, as we may receive WebTransport streams before peer's SETTINGS are |
| // received. |
| // TODO(b/184156476): consider whether this means we should drop buffered |
| // streams if we don't receive indication of WebTransport support. |
| if (!WillNegotiateWebTransport()) { |
| // Treat as unknown stream type. |
| break; |
| } |
| QUIC_DVLOG(1) << ENDPOINT << "Created an incoming WebTransport stream " |
| << pending->id(); |
| auto stream_owned = |
| std::make_unique<WebTransportHttp3UnidirectionalStream>(pending, |
| this); |
| WebTransportHttp3UnidirectionalStream* stream = stream_owned.get(); |
| ActivateStream(std::move(stream_owned)); |
| return stream; |
| } |
| default: |
| break; |
| } |
| MaybeSendStopSendingFrame( |
| pending->id(), |
| QuicResetStreamError::FromInternal(QUIC_STREAM_STREAM_CREATION_ERROR)); |
| pending->StopReading(); |
| return nullptr; |
| } |
| |
| void QuicSpdySession::MaybeInitializeHttp3UnidirectionalStreams() { |
| QUICHE_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 (!VersionUsesHttp3(transport_version()) || !IsEncryptionEstablished()) { |
| return; |
| } |
| |
| QUICHE_DCHECK_EQ(perspective(), Perspective::IS_SERVER); |
| |
| 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_ <= stream_id) { |
| // Do not send GOAWAY frame with a higher id, because it is forbidden. |
| // Do not send one with same stream id as before, since 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::MaybeBundleOpportunistically() { |
| if (qpack_decoder_ != nullptr) { |
| qpack_decoder_->FlushDecoderStream(); |
| } |
| } |
| |
| void QuicSpdySession::OnCanCreateNewOutgoingStream(bool unidirectional) { |
| if (unidirectional && VersionUsesHttp3(transport_version())) { |
| MaybeInitializeHttp3UnidirectionalStreams(); |
| } |
| } |
| |
| 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(); |
| } |
| |
| void QuicSpdySession::CloseConnectionOnDuplicateHttp3UnidirectionalStreams( |
| absl::string_view type) { |
| QUIC_PEER_BUG(quic_peer_bug_10360_9) << 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."); |
| } |
| } |
| } |
| |
| MessageStatus QuicSpdySession::SendHttp3Datagram(QuicStreamId stream_id, |
| absl::string_view payload) { |
| if (!SupportsH3Datagram()) { |
| QUIC_BUG(send http datagram too early) |
| << "Refusing to send HTTP Datagram before SETTINGS received"; |
| return MESSAGE_STATUS_INTERNAL_ERROR; |
| } |
| // Stream ID is sent divided by four as per the specification. |
| uint64_t stream_id_to_write = stream_id / kHttpDatagramStreamIdDivisor; |
| size_t slice_length = |
| QuicDataWriter::GetVarInt62Len(stream_id_to_write) + payload.length(); |
| quiche::QuicheBuffer buffer( |
| connection()->helper()->GetStreamSendBufferAllocator(), slice_length); |
| QuicDataWriter writer(slice_length, buffer.data()); |
| if (!writer.WriteVarInt62(stream_id_to_write)) { |
| QUIC_BUG(h3 datagram stream ID write fail) |
| << "Failed to write HTTP/3 datagram stream ID"; |
| return MESSAGE_STATUS_INTERNAL_ERROR; |
| } |
| if (!writer.WriteBytes(payload.data(), payload.length())) { |
| QUIC_BUG(h3 datagram payload write fail) |
| << "Failed to write HTTP/3 datagram payload"; |
| return MESSAGE_STATUS_INTERNAL_ERROR; |
| } |
| |
| quiche::QuicheMemSlice slice(std::move(buffer)); |
| return datagram_queue()->SendOrQueueDatagram(std::move(slice)); |
| } |
| |
| void QuicSpdySession::SetMaxDatagramTimeInQueueForStreamId( |
| QuicStreamId /*stream_id*/, QuicTime::Delta max_time_in_queue) { |
| // TODO(b/184598230): implement this in a way that works for multiple sessions |
| // on a same connection. |
| datagram_queue()->SetMaxTimeInQueue(max_time_in_queue); |
| } |
| |
| void QuicSpdySession::OnMessageReceived(absl::string_view message) { |
| QuicSession::OnMessageReceived(message); |
| if (!SupportsH3Datagram()) { |
| QUIC_DLOG(INFO) << "Ignoring unexpected received HTTP/3 datagram"; |
| return; |
| } |
| QuicDataReader reader(message); |
| uint64_t stream_id64; |
| if (!reader.ReadVarInt62(&stream_id64)) { |
| QUIC_DLOG(ERROR) << "Failed to parse stream ID in received HTTP/3 datagram"; |
| return; |
| } |
| // Stream ID is sent divided by four as per the specification. |
| if (stream_id64 > |
| std::numeric_limits<QuicStreamId>::max() / kHttpDatagramStreamIdDivisor) { |
| CloseConnectionWithDetails( |
| QUIC_HTTP_FRAME_ERROR, |
| absl::StrCat("Received HTTP Datagram with invalid quarter stream ID ", |
| stream_id64)); |
| return; |
| } |
| stream_id64 *= kHttpDatagramStreamIdDivisor; |
| QuicStreamId stream_id = static_cast<QuicStreamId>(stream_id64); |
| QuicSpdyStream* stream = |
| static_cast<QuicSpdyStream*>(GetActiveStream(stream_id)); |
| if (stream == nullptr) { |
| QUIC_DLOG(INFO) << "Received HTTP/3 datagram for unknown stream ID " |
| << stream_id; |
| // TODO(b/181256914) buffer HTTP/3 datagrams with unknown stream IDs for a |
| // short period of time in case they were reordered. |
| return; |
| } |
| stream->OnDatagramReceived(&reader); |
| } |
| |
| bool QuicSpdySession::SupportsWebTransport() { |
| return WillNegotiateWebTransport() && SupportsH3Datagram() && |
| NegotiatedWebTransportVersion().has_value() && allow_extended_connect_; |
| } |
| |
| std::optional<WebTransportHttp3Version> |
| QuicSpdySession::SupportedWebTransportVersion() { |
| if (!SupportsWebTransport()) { |
| return std::nullopt; |
| } |
| return NegotiatedWebTransportVersion(); |
| } |
| |
| bool QuicSpdySession::SupportsH3Datagram() const { |
| return http_datagram_support_ != HttpDatagramSupport::kNone; |
| } |
| |
| WebTransportHttp3* QuicSpdySession::GetWebTransportSession( |
| WebTransportSessionId id) { |
| if (!SupportsWebTransport()) { |
| return nullptr; |
| } |
| if (!IsValidWebTransportSessionId(id, version())) { |
| return nullptr; |
| } |
| QuicSpdyStream* connect_stream = GetOrCreateSpdyDataStream(id); |
| if (connect_stream == nullptr) { |
| return nullptr; |
| } |
| return connect_stream->web_transport(); |
| } |
| |
| bool QuicSpdySession::ShouldProcessIncomingRequests() { |
| if (!ShouldBufferRequestsUntilSettings()) { |
| return true; |
| } |
| |
| QUICHE_RELOADABLE_FLAG_COUNT_N(quic_block_until_settings_received_copt, 2, 4); |
| return settings_received_; |
| } |
| |
| void QuicSpdySession::OnStreamWaitingForClientSettings(QuicStreamId id) { |
| QUICHE_DCHECK(ShouldBufferRequestsUntilSettings()); |
| QUICHE_DCHECK(QuicUtils::IsBidirectionalStreamId(id, version())); |
| QUICHE_RELOADABLE_FLAG_COUNT_N(quic_block_until_settings_received_copt, 3, 4); |
| streams_waiting_for_settings_.insert(id); |
| } |
| |
| void QuicSpdySession::AssociateIncomingWebTransportStreamWithSession( |
| WebTransportSessionId session_id, QuicStreamId stream_id) { |
| if (QuicUtils::IsOutgoingStreamId(version(), stream_id, perspective())) { |
| QUIC_BUG(AssociateIncomingWebTransportStreamWithSession got outgoing stream) |
| << ENDPOINT |
| << "AssociateIncomingWebTransportStreamWithSession() got an outgoing " |
| "stream ID: " |
| << stream_id; |
| return; |
| } |
| WebTransportHttp3* session = GetWebTransportSession(session_id); |
| if (session != nullptr) { |
| QUIC_DVLOG(1) << ENDPOINT |
| << "Successfully associated incoming WebTransport stream " |
| << stream_id << " with session ID " << session_id; |
| |
| session->AssociateStream(stream_id); |
| return; |
| } |
| // Evict the oldest streams until we are under the limit. |
| while (buffered_streams_.size() >= kMaxUnassociatedWebTransportStreams) { |
| QUIC_DVLOG(1) << ENDPOINT << "Removing stream " |
| << buffered_streams_.front().stream_id |
| << " from buffered streams as the queue is full."; |
| ResetStream(buffered_streams_.front().stream_id, |
| QUIC_STREAM_WEBTRANSPORT_BUFFERED_STREAMS_LIMIT_EXCEEDED); |
| buffered_streams_.pop_front(); |
| } |
| QUIC_DVLOG(1) << ENDPOINT << "Received a WebTransport stream " << stream_id |
| << " for session ID " << session_id |
| << " but cannot associate it; buffering instead."; |
| buffered_streams_.push_back( |
| BufferedWebTransportStream{session_id, stream_id}); |
| } |
| |
| void QuicSpdySession::ProcessBufferedWebTransportStreamsForSession( |
| WebTransportHttp3* session) { |
| const WebTransportSessionId session_id = session->id(); |
| QUIC_DVLOG(1) << "Processing buffered WebTransport streams for " |
| << session_id; |
| auto it = buffered_streams_.begin(); |
| while (it != buffered_streams_.end()) { |
| if (it->session_id == session_id) { |
| QUIC_DVLOG(1) << "Unbuffered and associated WebTransport stream " |
| << it->stream_id << " with session " << it->session_id; |
| session->AssociateStream(it->stream_id); |
| it = buffered_streams_.erase(it); |
| } else { |
| it++; |
| } |
| } |
| } |
| |
| WebTransportHttp3UnidirectionalStream* |
| QuicSpdySession::CreateOutgoingUnidirectionalWebTransportStream( |
| WebTransportHttp3* session) { |
| if (!CanOpenNextOutgoingUnidirectionalStream()) { |
| return nullptr; |
| } |
| |
| QuicStreamId stream_id = GetNextOutgoingUnidirectionalStreamId(); |
| auto stream_owned = std::make_unique<WebTransportHttp3UnidirectionalStream>( |
| stream_id, this, session->id()); |
| WebTransportHttp3UnidirectionalStream* stream = stream_owned.get(); |
| ActivateStream(std::move(stream_owned)); |
| stream->WritePreamble(); |
| session->AssociateStream(stream_id); |
| return stream; |
| } |
| |
| QuicSpdyStream* QuicSpdySession::CreateOutgoingBidirectionalWebTransportStream( |
| WebTransportHttp3* session) { |
| QuicSpdyStream* stream = CreateOutgoingBidirectionalStream(); |
| if (stream == nullptr) { |
| return nullptr; |
| } |
| QuicStreamId stream_id = stream->id(); |
| stream->ConvertToWebTransportDataStream(session->id()); |
| if (stream->web_transport_stream() == nullptr) { |
| // An error in ConvertToWebTransportDataStream() would result in |
| // CONNECTION_CLOSE, thus we don't need to do anything here. |
| return nullptr; |
| } |
| session->AssociateStream(stream_id); |
| return stream; |
| } |
| |
| void QuicSpdySession::OnDatagramProcessed( |
| std::optional<MessageStatus> /*status*/) { |
| // TODO(b/184598230): make this work with multiple datagram flows. |
| } |
| |
| void QuicSpdySession::DatagramObserver::OnDatagramProcessed( |
| std::optional<MessageStatus> status) { |
| session_->OnDatagramProcessed(status); |
| } |
| |
| HttpDatagramSupport QuicSpdySession::LocalHttpDatagramSupport() { |
| return HttpDatagramSupport::kRfc; |
| } |
| |
| std::string HttpDatagramSupportToString( |
| HttpDatagramSupport http_datagram_support) { |
| switch (http_datagram_support) { |
| case HttpDatagramSupport::kNone: |
| return "None"; |
| case HttpDatagramSupport::kDraft04: |
| return "Draft04"; |
| case HttpDatagramSupport::kRfc: |
| return "Rfc"; |
| case HttpDatagramSupport::kRfcAndDraft04: |
| return "RfcAndDraft04"; |
| } |
| return absl::StrCat("Unknown(", static_cast<int>(http_datagram_support), ")"); |
| } |
| |
| std::ostream& operator<<(std::ostream& os, |
| const HttpDatagramSupport& http_datagram_support) { |
| os << HttpDatagramSupportToString(http_datagram_support); |
| return os; |
| } |
| |
| // Must not be called after Initialize(). |
| void QuicSpdySession::set_allow_extended_connect(bool allow_extended_connect) { |
| QUIC_BUG_IF(extended connect wrong version, |
| !VersionUsesHttp3(transport_version())) |
| << "Try to enable/disable extended CONNECT in Google QUIC"; |
| QUIC_BUG_IF(extended connect on client, |
| perspective() == Perspective::IS_CLIENT) |
| << "Enabling/disabling extended CONNECT on the client side has no effect"; |
| if (ShouldNegotiateWebTransport()) { |
| QUIC_BUG_IF(disable extended connect, !allow_extended_connect) |
| << "Disabling extended CONNECT with web transport enabled has no " |
| "effect."; |
| return; |
| } |
| allow_extended_connect_ = allow_extended_connect; |
| } |
| |
| void QuicSpdySession::OnConfigNegotiated() { |
| QuicSession::OnConfigNegotiated(); |
| |
| if (GetQuicReloadableFlag(quic_block_until_settings_received_copt) && |
| perspective() == Perspective::IS_SERVER && |
| config()->HasClientSentConnectionOption(kBSUS, Perspective::IS_SERVER)) { |
| QUICHE_RELOADABLE_FLAG_COUNT_N(quic_block_until_settings_received_copt, 1, |
| 4); |
| force_buffer_requests_until_settings_ = true; |
| } |
| } |
| |
| #undef ENDPOINT // undef for jumbo builds |
| |
| } // namespace quic |