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quiche / quiche.git / bae24053c94bd1ae6b264bb55a583037b5eccc5d / . / quiche / quic / core / http / quic_spdy_stream.cc
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// Copyright 2013 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_stream.h"
#include <limits>
#include <memory>
#include <string>
#include <utility>
#include "absl/base/macros.h"
#include "absl/strings/numbers.h"
#include "absl/strings/str_cat.h"
#include "absl/strings/string_view.h"
#include "quiche/http2/http2_constants.h"
#include "quiche/quic/core/http/capsule.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_spdy_session.h"
#include "quiche/quic/core/http/spdy_utils.h"
#include "quiche/quic/core/http/web_transport_http3.h"
#include "quiche/quic/core/qpack/qpack_decoder.h"
#include "quiche/quic/core/qpack/qpack_encoder.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/core/quic_write_blocked_list.h"
#include "quiche/quic/core/web_transport_interface.h"
#include "quiche/quic/platform/api/quic_bug_tracker.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/common/quiche_mem_slice_storage.h"
#include "quiche/common/quiche_text_utils.h"
#include "quiche/spdy/core/spdy_protocol.h"
using spdy::Http2HeaderBlock;
using spdy::SpdyPriority;
namespace quic {
// Visitor of HttpDecoder that passes data frame to QuicSpdyStream and closes
// the connection on unexpected frames.
class QuicSpdyStream::HttpDecoderVisitor : public HttpDecoder::Visitor {
public:
explicit HttpDecoderVisitor(QuicSpdyStream* stream) : stream_(stream) {}
HttpDecoderVisitor(const HttpDecoderVisitor&) = delete;
HttpDecoderVisitor& operator=(const HttpDecoderVisitor&) = delete;
void OnError(HttpDecoder* decoder) override {
stream_->OnUnrecoverableError(decoder->error(), decoder->error_detail());
}
bool OnMaxPushIdFrame() override {
CloseConnectionOnWrongFrame("Max Push Id");
return false;
}
bool OnGoAwayFrame(const GoAwayFrame& /*frame*/) override {
CloseConnectionOnWrongFrame("Goaway");
return false;
}
bool OnSettingsFrameStart(QuicByteCount /*header_length*/) override {
CloseConnectionOnWrongFrame("Settings");
return false;
}
bool OnSettingsFrame(const SettingsFrame& /*frame*/) override {
CloseConnectionOnWrongFrame("Settings");
return false;
}
bool OnDataFrameStart(QuicByteCount header_length,
QuicByteCount payload_length) override {
return stream_->OnDataFrameStart(header_length, payload_length);
}
bool OnDataFramePayload(absl::string_view payload) override {
QUICHE_DCHECK(!payload.empty());
return stream_->OnDataFramePayload(payload);
}
bool OnDataFrameEnd() override { return stream_->OnDataFrameEnd(); }
bool OnHeadersFrameStart(QuicByteCount header_length,
QuicByteCount payload_length) override {
if (!VersionUsesHttp3(stream_->transport_version())) {
CloseConnectionOnWrongFrame("Headers");
return false;
}
return stream_->OnHeadersFrameStart(header_length, payload_length);
}
bool OnHeadersFramePayload(absl::string_view payload) override {
QUICHE_DCHECK(!payload.empty());
if (!VersionUsesHttp3(stream_->transport_version())) {
CloseConnectionOnWrongFrame("Headers");
return false;
}
return stream_->OnHeadersFramePayload(payload);
}
bool OnHeadersFrameEnd() override {
if (!VersionUsesHttp3(stream_->transport_version())) {
CloseConnectionOnWrongFrame("Headers");
return false;
}
return stream_->OnHeadersFrameEnd();
}
bool OnPriorityUpdateFrameStart(QuicByteCount /*header_length*/) override {
CloseConnectionOnWrongFrame("Priority update");
return false;
}
bool OnPriorityUpdateFrame(const PriorityUpdateFrame& /*frame*/) override {
CloseConnectionOnWrongFrame("Priority update");
return false;
}
bool OnAcceptChFrameStart(QuicByteCount /*header_length*/) override {
CloseConnectionOnWrongFrame("ACCEPT_CH");
return false;
}
bool OnAcceptChFrame(const AcceptChFrame& /*frame*/) override {
CloseConnectionOnWrongFrame("ACCEPT_CH");
return false;
}
void OnWebTransportStreamFrameType(
QuicByteCount header_length, WebTransportSessionId session_id) override {
stream_->OnWebTransportStreamFrameType(header_length, session_id);
}
bool OnUnknownFrameStart(uint64_t frame_type, QuicByteCount header_length,
QuicByteCount payload_length) override {
return stream_->OnUnknownFrameStart(frame_type, header_length,
payload_length);
}
bool OnUnknownFramePayload(absl::string_view payload) override {
return stream_->OnUnknownFramePayload(payload);
}
bool OnUnknownFrameEnd() override { return stream_->OnUnknownFrameEnd(); }
private:
void CloseConnectionOnWrongFrame(absl::string_view frame_type) {
stream_->OnUnrecoverableError(
QUIC_HTTP_FRAME_UNEXPECTED_ON_SPDY_STREAM,
absl::StrCat(frame_type, " frame received on data stream"));
}
QuicSpdyStream* stream_;
};
#define ENDPOINT \
(session()->perspective() == Perspective::IS_SERVER ? "Server: " \
: "Client:" \
" ")
namespace {
HttpDecoder::Options HttpDecoderOptionsForBidiStream(
QuicSpdySession* spdy_session) {
HttpDecoder::Options options;
options.allow_web_transport_stream =
spdy_session->WillNegotiateWebTransport();
return options;
}
} // namespace
QuicSpdyStream::QuicSpdyStream(QuicStreamId id, QuicSpdySession* spdy_session,
StreamType type)
: QuicStream(id, spdy_session, /*is_static=*/false, type),
spdy_session_(spdy_session),
on_body_available_called_because_sequencer_is_closed_(false),
visitor_(nullptr),
blocked_on_decoding_headers_(false),
headers_decompressed_(false),
header_list_size_limit_exceeded_(false),
headers_payload_length_(0),
trailers_decompressed_(false),
trailers_consumed_(false),
http_decoder_visitor_(std::make_unique<HttpDecoderVisitor>(this)),
decoder_(http_decoder_visitor_.get(),
HttpDecoderOptionsForBidiStream(spdy_session)),
sequencer_offset_(0),
is_decoder_processing_input_(false),
ack_listener_(nullptr),
last_sent_urgency_(kDefaultUrgency) {
QUICHE_DCHECK_EQ(session()->connection(), spdy_session->connection());
QUICHE_DCHECK_EQ(transport_version(), spdy_session->transport_version());
QUICHE_DCHECK(!QuicUtils::IsCryptoStreamId(transport_version(), id));
QUICHE_DCHECK_EQ(0u, sequencer()->NumBytesConsumed());
// If headers are sent on the headers stream, then do not receive any
// callbacks from the sequencer until headers are complete.
if (!VersionUsesHttp3(transport_version())) {
sequencer()->SetBlockedUntilFlush();
}
if (VersionUsesHttp3(transport_version())) {
sequencer()->set_level_triggered(true);
}
spdy_session_->OnStreamCreated(this);
}
QuicSpdyStream::QuicSpdyStream(PendingStream* pending,
QuicSpdySession* spdy_session)
: QuicStream(pending, spdy_session, /*is_static=*/false),
spdy_session_(spdy_session),
on_body_available_called_because_sequencer_is_closed_(false),
visitor_(nullptr),
blocked_on_decoding_headers_(false),
headers_decompressed_(false),
header_list_size_limit_exceeded_(false),
headers_payload_length_(0),
trailers_decompressed_(false),
trailers_consumed_(false),
http_decoder_visitor_(std::make_unique<HttpDecoderVisitor>(this)),
decoder_(http_decoder_visitor_.get()),
sequencer_offset_(sequencer()->NumBytesConsumed()),
is_decoder_processing_input_(false),
ack_listener_(nullptr),
last_sent_urgency_(kDefaultUrgency) {
QUICHE_DCHECK_EQ(session()->connection(), spdy_session->connection());
QUICHE_DCHECK_EQ(transport_version(), spdy_session->transport_version());
QUICHE_DCHECK(!QuicUtils::IsCryptoStreamId(transport_version(), id()));
// If headers are sent on the headers stream, then do not receive any
// callbacks from the sequencer until headers are complete.
if (!VersionUsesHttp3(transport_version())) {
sequencer()->SetBlockedUntilFlush();
}
if (VersionUsesHttp3(transport_version())) {
sequencer()->set_level_triggered(true);
}
spdy_session_->OnStreamCreated(this);
}
QuicSpdyStream::~QuicSpdyStream() {}
size_t QuicSpdyStream::WriteHeaders(
Http2HeaderBlock header_block, bool fin,
quiche::QuicheReferenceCountedPointer<QuicAckListenerInterface>
ack_listener) {
if (!AssertNotWebTransportDataStream("writing headers")) {
return 0;
}
QuicConnection::ScopedPacketFlusher flusher(spdy_session_->connection());
MaybeProcessSentWebTransportHeaders(header_block);
if (web_transport_ != nullptr &&
spdy_session_->perspective() == Perspective::IS_SERVER) {
header_block["sec-webtransport-http3-draft"] = "draft02";
}
size_t bytes_written =
WriteHeadersImpl(std::move(header_block), fin, std::move(ack_listener));
if (!VersionUsesHttp3(transport_version()) && fin) {
// If HEADERS are sent on the headers stream, then |fin_sent_| needs to be
// set and write side needs to be closed without actually sending a FIN on
// this stream.
// TODO(rch): Add test to ensure fin_sent_ is set whenever a fin is sent.
SetFinSent();
CloseWriteSide();
}
if (web_transport_ != nullptr &&
session()->perspective() == Perspective::IS_CLIENT) {
WriteGreaseCapsule();
if (spdy_session_->http_datagram_support() ==
HttpDatagramSupport::kDraft04) {
// Send a REGISTER_DATAGRAM_NO_CONTEXT capsule to support servers that
// are running draft-ietf-masque-h3-datagram-04 or -05.
uint64_t capsule_type = 0xff37a2; // REGISTER_DATAGRAM_NO_CONTEXT
constexpr unsigned char capsule_data[4] = {
0x80, 0xff, 0x7c, 0x00, // WEBTRANSPORT datagram format type
};
WriteCapsule(Capsule::Unknown(
capsule_type,
absl::string_view(reinterpret_cast<const char*>(capsule_data),
sizeof(capsule_data))));
WriteGreaseCapsule();
}
}
if (connect_ip_visitor_ != nullptr) {
connect_ip_visitor_->OnHeadersWritten();
}
return bytes_written;
}
void QuicSpdyStream::WriteOrBufferBody(absl::string_view data, bool fin) {
if (!AssertNotWebTransportDataStream("writing body data")) {
return;
}
if (!VersionUsesHttp3(transport_version()) || data.length() == 0) {
WriteOrBufferData(data, fin, nullptr);
return;
}
QuicConnection::ScopedPacketFlusher flusher(spdy_session_->connection());
if (spdy_session_->debug_visitor()) {
spdy_session_->debug_visitor()->OnDataFrameSent(id(), data.length());
}
const bool success =
WriteDataFrameHeader(data.length(), /*force_write=*/true);
QUICHE_DCHECK(success);
// Write body.
QUIC_DLOG(INFO) << ENDPOINT << "Stream " << id()
<< " is writing DATA frame payload of length "
<< data.length() << " with fin " << fin;
WriteOrBufferData(data, fin, nullptr);
}
size_t QuicSpdyStream::WriteTrailers(
Http2HeaderBlock trailer_block,
quiche::QuicheReferenceCountedPointer<QuicAckListenerInterface>
ack_listener) {
if (fin_sent()) {
QUIC_BUG(quic_bug_10410_1)
<< "Trailers cannot be sent after a FIN, on stream " << id();
return 0;
}
if (!VersionUsesHttp3(transport_version())) {
// The header block must contain the final offset for this stream, as the
// trailers may be processed out of order at the peer.
const QuicStreamOffset final_offset =
stream_bytes_written() + BufferedDataBytes();
QUIC_DLOG(INFO) << ENDPOINT << "Inserting trailer: ("
<< kFinalOffsetHeaderKey << ", " << final_offset << ")";
trailer_block.insert(
std::make_pair(kFinalOffsetHeaderKey, absl::StrCat(final_offset)));
}
// Write the trailing headers with a FIN, and close stream for writing:
// trailers are the last thing to be sent on a stream.
const bool kFin = true;
size_t bytes_written =
WriteHeadersImpl(std::move(trailer_block), kFin, std::move(ack_listener));
// If trailers are sent on the headers stream, then |fin_sent_| needs to be
// set without actually sending a FIN on this stream.
if (!VersionUsesHttp3(transport_version())) {
SetFinSent();
// Also, write side of this stream needs to be closed. However, only do
// this if there is no more buffered data, otherwise it will never be sent.
if (BufferedDataBytes() == 0) {
CloseWriteSide();
}
}
return bytes_written;
}
QuicConsumedData QuicSpdyStream::WritevBody(const struct iovec* iov, int count,
bool fin) {
quiche::QuicheMemSliceStorage storage(
iov, count,
session()->connection()->helper()->GetStreamSendBufferAllocator(),
GetQuicFlag(quic_send_buffer_max_data_slice_size));
return WriteBodySlices(storage.ToSpan(), fin);
}
bool QuicSpdyStream::WriteDataFrameHeader(QuicByteCount data_length,
bool force_write) {
QUICHE_DCHECK(VersionUsesHttp3(transport_version()));
QUICHE_DCHECK_GT(data_length, 0u);
quiche::QuicheBuffer header = HttpEncoder::SerializeDataFrameHeader(
data_length,
spdy_session_->connection()->helper()->GetStreamSendBufferAllocator());
const bool can_write = CanWriteNewDataAfterData(header.size());
if (!can_write && !force_write) {
return false;
}
if (spdy_session_->debug_visitor()) {
spdy_session_->debug_visitor()->OnDataFrameSent(id(), data_length);
}
unacked_frame_headers_offsets_.Add(
send_buffer().stream_offset(),
send_buffer().stream_offset() + header.size());
QUIC_DLOG(INFO) << ENDPOINT << "Stream " << id()
<< " is writing DATA frame header of length "
<< header.size();
if (can_write) {
// Save one copy and allocation if send buffer can accomodate the header.
quiche::QuicheMemSlice header_slice(std::move(header));
WriteMemSlices(absl::MakeSpan(&header_slice, 1), false);
} else {
QUICHE_DCHECK(force_write);
WriteOrBufferData(header.AsStringView(), false, nullptr);
}
return true;
}
QuicConsumedData QuicSpdyStream::WriteBodySlices(
absl::Span<quiche::QuicheMemSlice> slices, bool fin) {
if (!VersionUsesHttp3(transport_version()) || slices.empty()) {
return WriteMemSlices(slices, fin);
}
QuicConnection::ScopedPacketFlusher flusher(spdy_session_->connection());
const QuicByteCount data_size = MemSliceSpanTotalSize(slices);
if (!WriteDataFrameHeader(data_size, /*force_write=*/false)) {
return {0, false};
}
QUIC_DLOG(INFO) << ENDPOINT << "Stream " << id()
<< " is writing DATA frame payload of length " << data_size;
return WriteMemSlices(slices, fin);
}
size_t QuicSpdyStream::Readv(const struct iovec* iov, size_t iov_len) {
QUICHE_DCHECK(FinishedReadingHeaders());
if (!VersionUsesHttp3(transport_version())) {
return sequencer()->Readv(iov, iov_len);
}
size_t bytes_read = 0;
sequencer()->MarkConsumed(body_manager_.ReadBody(iov, iov_len, &bytes_read));
return bytes_read;
}
int QuicSpdyStream::GetReadableRegions(iovec* iov, size_t iov_len) const {
QUICHE_DCHECK(FinishedReadingHeaders());
if (!VersionUsesHttp3(transport_version())) {
return sequencer()->GetReadableRegions(iov, iov_len);
}
return body_manager_.PeekBody(iov, iov_len);
}
void QuicSpdyStream::MarkConsumed(size_t num_bytes) {
QUICHE_DCHECK(FinishedReadingHeaders());
if (!VersionUsesHttp3(transport_version())) {
sequencer()->MarkConsumed(num_bytes);
return;
}
sequencer()->MarkConsumed(body_manager_.OnBodyConsumed(num_bytes));
}
bool QuicSpdyStream::IsDoneReading() const {
bool done_reading_headers = FinishedReadingHeaders();
bool done_reading_body = sequencer()->IsClosed();
bool done_reading_trailers = FinishedReadingTrailers();
return done_reading_headers && done_reading_body && done_reading_trailers;
}
bool QuicSpdyStream::HasBytesToRead() const {
if (!VersionUsesHttp3(transport_version())) {
return sequencer()->HasBytesToRead();
}
return body_manager_.HasBytesToRead();
}
void QuicSpdyStream::MarkTrailersConsumed() { trailers_consumed_ = true; }
uint64_t QuicSpdyStream::total_body_bytes_read() const {
if (VersionUsesHttp3(transport_version())) {
return body_manager_.total_body_bytes_received();
}
return sequencer()->NumBytesConsumed();
}
void QuicSpdyStream::ConsumeHeaderList() {
header_list_.Clear();
if (!FinishedReadingHeaders()) {
return;
}
if (!VersionUsesHttp3(transport_version())) {
sequencer()->SetUnblocked();
return;
}
if (body_manager_.HasBytesToRead()) {
HandleBodyAvailable();
return;
}
if (sequencer()->IsClosed() &&
!on_body_available_called_because_sequencer_is_closed_) {
on_body_available_called_because_sequencer_is_closed_ = true;
HandleBodyAvailable();
}
}
void QuicSpdyStream::OnStreamHeadersPriority(
const spdy::SpdyStreamPrecedence& precedence) {
QUICHE_DCHECK_EQ(Perspective::IS_SERVER,
session()->connection()->perspective());
SetPriority(precedence);
}
void QuicSpdyStream::OnStreamHeaderList(bool fin, size_t frame_len,
const QuicHeaderList& header_list) {
if (!spdy_session()->user_agent_id().has_value()) {
std::string uaid;
for (const auto& kv : header_list) {
if (quiche::QuicheTextUtils::ToLower(kv.first) == kUserAgentHeaderName) {
uaid = kv.second;
break;
}
}
spdy_session()->SetUserAgentId(std::move(uaid));
}
// TODO(b/134706391): remove |fin| argument.
// When using Google QUIC, an empty header list indicates that the size limit
// has been exceeded.
// When using IETF QUIC, there is an explicit signal from
// QpackDecodedHeadersAccumulator.
if ((VersionUsesHttp3(transport_version()) &&
header_list_size_limit_exceeded_) ||
(!VersionUsesHttp3(transport_version()) && header_list.empty())) {
OnHeadersTooLarge();
if (IsDoneReading()) {
return;
}
}
if (!headers_decompressed_) {
OnInitialHeadersComplete(fin, frame_len, header_list);
} else {
OnTrailingHeadersComplete(fin, frame_len, header_list);
}
}
void QuicSpdyStream::OnHeadersDecoded(QuicHeaderList headers,
bool header_list_size_limit_exceeded) {
header_list_size_limit_exceeded_ = header_list_size_limit_exceeded;
qpack_decoded_headers_accumulator_.reset();
QuicSpdySession::LogHeaderCompressionRatioHistogram(
/* using_qpack = */ true,
/* is_sent = */ false, headers.compressed_header_bytes(),
headers.uncompressed_header_bytes());
const QuicStreamId promised_stream_id = spdy_session()->promised_stream_id();
Http3DebugVisitor* const debug_visitor = spdy_session()->debug_visitor();
if (promised_stream_id ==
QuicUtils::GetInvalidStreamId(transport_version())) {
if (debug_visitor) {
debug_visitor->OnHeadersDecoded(id(), headers);
}
OnStreamHeaderList(/* fin = */ false, headers_payload_length_, headers);
} else {
spdy_session_->OnHeaderList(headers);
}
if (blocked_on_decoding_headers_) {
blocked_on_decoding_headers_ = false;
// Continue decoding HTTP/3 frames.
OnDataAvailable();
}
}
void QuicSpdyStream::OnHeaderDecodingError(QuicErrorCode error_code,
absl::string_view error_message) {
qpack_decoded_headers_accumulator_.reset();
std::string connection_close_error_message = absl::StrCat(
"Error decoding ", headers_decompressed_ ? "trailers" : "headers",
" on stream ", id(), ": ", error_message);
OnUnrecoverableError(error_code, connection_close_error_message);
}
void QuicSpdyStream::MaybeSendPriorityUpdateFrame() {
if (!VersionUsesHttp3(transport_version()) ||
session()->perspective() != Perspective::IS_CLIENT) {
return;
}
// Value between 0 and 7, inclusive. Lower value means higher priority.
int urgency = precedence().spdy3_priority();
if (last_sent_urgency_ == urgency) {
return;
}
last_sent_urgency_ = urgency;
PriorityUpdateFrame priority_update;
priority_update.prioritized_element_type = REQUEST_STREAM;
priority_update.prioritized_element_id = id();
priority_update.priority_field_value = absl::StrCat("u=", urgency);
spdy_session_->WriteHttp3PriorityUpdate(priority_update);
}
void QuicSpdyStream::OnHeadersTooLarge() { Reset(QUIC_HEADERS_TOO_LARGE); }
void QuicSpdyStream::OnInitialHeadersComplete(
bool fin, size_t /*frame_len*/, const QuicHeaderList& header_list) {
// TODO(b/134706391): remove |fin| argument.
headers_decompressed_ = true;
header_list_ = header_list;
bool header_too_large = VersionUsesHttp3(transport_version())
? header_list_size_limit_exceeded_
: header_list.empty();
if (!AreHeaderFieldValuesValid(header_list)) {
OnInvalidHeaders();
return;
}
// Validate request headers if it did not exceed size limit. If it did,
// OnHeadersTooLarge() should have already handled it previously.
if (!header_too_large && !AreHeadersValid(header_list)) {
QUIC_CODE_COUNT_N(quic_validate_request_header, 1, 2);
if (GetQuicReloadableFlag(quic_act_upon_invalid_header)) {
QUIC_RELOADABLE_FLAG_COUNT(quic_act_upon_invalid_header);
OnInvalidHeaders();
return;
}
}
QUIC_CODE_COUNT_N(quic_validate_request_header, 2, 2);
if (!GetQuicReloadableFlag(quic_verify_request_headers_2) ||
!header_too_large) {
MaybeProcessReceivedWebTransportHeaders();
}
if (VersionUsesHttp3(transport_version())) {
if (fin) {
OnStreamFrame(QuicStreamFrame(id(), /* fin = */ true,
highest_received_byte_offset(),
absl::string_view()));
}
return;
}
if (fin && !rst_sent()) {
OnStreamFrame(
QuicStreamFrame(id(), fin, /* offset = */ 0, absl::string_view()));
}
if (FinishedReadingHeaders()) {
sequencer()->SetUnblocked();
}
}
void QuicSpdyStream::OnPromiseHeaderList(
QuicStreamId /* promised_id */, size_t /* frame_len */,
const QuicHeaderList& /*header_list */) {
// To be overridden in QuicSpdyClientStream. Not supported on
// server side.
stream_delegate()->OnStreamError(QUIC_INVALID_HEADERS_STREAM_DATA,
"Promise headers received by server");
}
void QuicSpdyStream::OnTrailingHeadersComplete(
bool fin, size_t /*frame_len*/, const QuicHeaderList& header_list) {
// TODO(b/134706391): remove |fin| argument.
QUICHE_DCHECK(!trailers_decompressed_);
if (!VersionUsesHttp3(transport_version()) && fin_received()) {
QUIC_DLOG(INFO) << ENDPOINT
<< "Received Trailers after FIN, on stream: " << id();
stream_delegate()->OnStreamError(QUIC_INVALID_HEADERS_STREAM_DATA,
"Trailers after fin");
return;
}
if (!VersionUsesHttp3(transport_version()) && !fin) {
QUIC_DLOG(INFO) << ENDPOINT
<< "Trailers must have FIN set, on stream: " << id();
stream_delegate()->OnStreamError(QUIC_INVALID_HEADERS_STREAM_DATA,
"Fin missing from trailers");
return;
}
size_t final_byte_offset = 0;
const bool expect_final_byte_offset = !VersionUsesHttp3(transport_version());
if (!SpdyUtils::CopyAndValidateTrailers(header_list, expect_final_byte_offset,
&final_byte_offset,
&received_trailers_)) {
QUIC_DLOG(ERROR) << ENDPOINT << "Trailers for stream " << id()
<< " are malformed.";
stream_delegate()->OnStreamError(QUIC_INVALID_HEADERS_STREAM_DATA,
"Trailers are malformed");
return;
}
trailers_decompressed_ = true;
if (fin) {
const QuicStreamOffset offset = VersionUsesHttp3(transport_version())
? highest_received_byte_offset()
: final_byte_offset;
OnStreamFrame(QuicStreamFrame(id(), fin, offset, absl::string_view()));
}
}
void QuicSpdyStream::OnPriorityFrame(
const spdy::SpdyStreamPrecedence& precedence) {
QUICHE_DCHECK_EQ(Perspective::IS_SERVER,
session()->connection()->perspective());
SetPriority(precedence);
}
void QuicSpdyStream::OnStreamReset(const QuicRstStreamFrame& frame) {
if (web_transport_data_ != nullptr) {
WebTransportStreamVisitor* webtransport_visitor =
web_transport_data_->adapter.visitor();
if (webtransport_visitor != nullptr) {
webtransport_visitor->OnResetStreamReceived(
Http3ErrorToWebTransportOrDefault(frame.ietf_error_code));
}
QuicStream::OnStreamReset(frame);
return;
}
if (VersionUsesHttp3(transport_version()) && !fin_received() &&
spdy_session_->qpack_decoder()) {
spdy_session_->qpack_decoder()->OnStreamReset(id());
qpack_decoded_headers_accumulator_.reset();
}
if (VersionUsesHttp3(transport_version()) ||
frame.error_code != QUIC_STREAM_NO_ERROR) {
QuicStream::OnStreamReset(frame);
return;
}
QUIC_DVLOG(1) << ENDPOINT
<< "Received QUIC_STREAM_NO_ERROR, not discarding response";
set_rst_received(true);
MaybeIncreaseHighestReceivedOffset(frame.byte_offset);
set_stream_error(frame.error());
CloseWriteSide();
}
void QuicSpdyStream::ResetWithError(QuicResetStreamError error) {
if (VersionUsesHttp3(transport_version()) && !fin_received() &&
spdy_session_->qpack_decoder() && web_transport_data_ == nullptr) {
spdy_session_->qpack_decoder()->OnStreamReset(id());
qpack_decoded_headers_accumulator_.reset();
}
QuicStream::ResetWithError(error);
}
bool QuicSpdyStream::OnStopSending(QuicResetStreamError error) {
if (web_transport_data_ != nullptr) {
WebTransportStreamVisitor* visitor = web_transport_data_->adapter.visitor();
if (visitor != nullptr) {
visitor->OnStopSendingReceived(
Http3ErrorToWebTransportOrDefault(error.ietf_application_code()));
}
}
return QuicStream::OnStopSending(error);
}
void QuicSpdyStream::OnWriteSideInDataRecvdState() {
if (web_transport_data_ != nullptr) {
WebTransportStreamVisitor* visitor = web_transport_data_->adapter.visitor();
if (visitor != nullptr) {
visitor->OnWriteSideInDataRecvdState();
}
}
QuicStream::OnWriteSideInDataRecvdState();
}
void QuicSpdyStream::OnDataAvailable() {
if (!VersionUsesHttp3(transport_version())) {
// Sequencer must be blocked until headers are consumed.
QUICHE_DCHECK(FinishedReadingHeaders());
}
if (!VersionUsesHttp3(transport_version())) {
HandleBodyAvailable();
return;
}
if (web_transport_data_ != nullptr) {
web_transport_data_->adapter.OnDataAvailable();
return;
}
if (!spdy_session()->ShouldProcessIncomingRequests()) {
spdy_session()->OnStreamWaitingForClientSettings(id());
return;
}
if (is_decoder_processing_input_) {
// Let the outermost nested OnDataAvailable() call do the work.
return;
}
if (blocked_on_decoding_headers_) {
return;
}
iovec iov;
while (session()->connection()->connected() && !reading_stopped() &&
decoder_.error() == QUIC_NO_ERROR) {
QUICHE_DCHECK_GE(sequencer_offset_, sequencer()->NumBytesConsumed());
if (!sequencer()->PeekRegion(sequencer_offset_, &iov)) {
break;
}
QUICHE_DCHECK(!sequencer()->IsClosed());
is_decoder_processing_input_ = true;
QuicByteCount processed_bytes = decoder_.ProcessInput(
reinterpret_cast<const char*>(iov.iov_base), iov.iov_len);
is_decoder_processing_input_ = false;
if (!session()->connection()->connected()) {
return;
}
sequencer_offset_ += processed_bytes;
if (blocked_on_decoding_headers_) {
return;
}
if (web_transport_data_ != nullptr) {
return;
}
}
// Do not call HandleBodyAvailable() until headers are consumed.
if (!FinishedReadingHeaders()) {
return;
}
if (body_manager_.HasBytesToRead()) {
HandleBodyAvailable();
return;
}
if (sequencer()->IsClosed() &&
!on_body_available_called_because_sequencer_is_closed_) {
on_body_available_called_because_sequencer_is_closed_ = true;
HandleBodyAvailable();
}
}
void QuicSpdyStream::OnClose() {
QuicStream::OnClose();
qpack_decoded_headers_accumulator_.reset();
if (visitor_) {
Visitor* visitor = visitor_;
// Calling Visitor::OnClose() may result the destruction of the visitor,
// so we need to ensure we don't call it again.
visitor_ = nullptr;
visitor->OnClose(this);
}
if (web_transport_ != nullptr) {
web_transport_->OnConnectStreamClosing();
}
if (web_transport_data_ != nullptr) {
WebTransportHttp3* web_transport =
spdy_session_->GetWebTransportSession(web_transport_data_->session_id);
if (web_transport == nullptr) {
// Since there is no guaranteed destruction order for streams, the session
// could be already removed from the stream map by the time we reach here.
QUIC_DLOG(WARNING) << ENDPOINT << "WebTransport stream " << id()
<< " attempted to notify parent session "
<< web_transport_data_->session_id
<< ", but the session could not be found.";
return;
}
web_transport->OnStreamClosed(id());
}
}
void QuicSpdyStream::OnCanWrite() {
QuicStream::OnCanWrite();
// Trailers (and hence a FIN) may have been sent ahead of queued body bytes.
if (!HasBufferedData() && fin_sent()) {
CloseWriteSide();
}
}
bool QuicSpdyStream::FinishedReadingHeaders() const {
return headers_decompressed_ && header_list_.empty();
}
// static
bool QuicSpdyStream::ParseHeaderStatusCode(const Http2HeaderBlock& header,
int* status_code) {
Http2HeaderBlock::const_iterator it = header.find(spdy::kHttp2StatusHeader);
if (it == header.end()) {
return false;
}
const absl::string_view status(it->second);
if (status.size() != 3) {
return false;
}
// First character must be an integer in range [1,5].
if (status[0] < '1' || status[0] > '5') {
return false;
}
// The remaining two characters must be integers.
if (!isdigit(status[1]) || !isdigit(status[2])) {
return false;
}
return absl::SimpleAtoi(status, status_code);
}
bool QuicSpdyStream::FinishedReadingTrailers() const {
// If no further trailing headers are expected, and the decompressed trailers
// (if any) have been consumed, then reading of trailers is finished.
if (!fin_received()) {
return false;
} else if (!trailers_decompressed_) {
return true;
} else {
return trailers_consumed_;
}
}
bool QuicSpdyStream::OnDataFrameStart(QuicByteCount header_length,
QuicByteCount payload_length) {
QUICHE_DCHECK(VersionUsesHttp3(transport_version()));
if (spdy_session_->debug_visitor()) {
spdy_session_->debug_visitor()->OnDataFrameReceived(id(), payload_length);
}
if (!headers_decompressed_ || trailers_decompressed_) {
stream_delegate()->OnStreamError(
QUIC_HTTP_INVALID_FRAME_SEQUENCE_ON_SPDY_STREAM,
"Unexpected DATA frame received.");
return false;
}
sequencer()->MarkConsumed(body_manager_.OnNonBody(header_length));
return true;
}
bool QuicSpdyStream::OnDataFramePayload(absl::string_view payload) {
QUICHE_DCHECK(VersionUsesHttp3(transport_version()));
body_manager_.OnBody(payload);
return true;
}
bool QuicSpdyStream::OnDataFrameEnd() {
QUICHE_DCHECK(VersionUsesHttp3(transport_version()));
QUIC_DVLOG(1) << ENDPOINT
<< "Reaches the end of a data frame. Total bytes received are "
<< body_manager_.total_body_bytes_received();
return true;
}
bool QuicSpdyStream::OnStreamFrameAcked(QuicStreamOffset offset,
QuicByteCount data_length,
bool fin_acked,
QuicTime::Delta ack_delay_time,
QuicTime receive_timestamp,
QuicByteCount* newly_acked_length) {
const bool new_data_acked = QuicStream::OnStreamFrameAcked(
offset, data_length, fin_acked, ack_delay_time, receive_timestamp,
newly_acked_length);
const QuicByteCount newly_acked_header_length =
GetNumFrameHeadersInInterval(offset, data_length);
QUICHE_DCHECK_LE(newly_acked_header_length, *newly_acked_length);
unacked_frame_headers_offsets_.Difference(offset, offset + data_length);
if (ack_listener_ != nullptr && new_data_acked) {
ack_listener_->OnPacketAcked(
*newly_acked_length - newly_acked_header_length, ack_delay_time);
}
return new_data_acked;
}
void QuicSpdyStream::OnStreamFrameRetransmitted(QuicStreamOffset offset,
QuicByteCount data_length,
bool fin_retransmitted) {
QuicStream::OnStreamFrameRetransmitted(offset, data_length,
fin_retransmitted);
const QuicByteCount retransmitted_header_length =
GetNumFrameHeadersInInterval(offset, data_length);
QUICHE_DCHECK_LE(retransmitted_header_length, data_length);
if (ack_listener_ != nullptr) {
ack_listener_->OnPacketRetransmitted(data_length -
retransmitted_header_length);
}
}
QuicByteCount QuicSpdyStream::GetNumFrameHeadersInInterval(
QuicStreamOffset offset, QuicByteCount data_length) const {
QuicByteCount header_acked_length = 0;
QuicIntervalSet<QuicStreamOffset> newly_acked(offset, offset + data_length);
newly_acked.Intersection(unacked_frame_headers_offsets_);
for (const auto& interval : newly_acked) {
header_acked_length += interval.Length();
}
return header_acked_length;
}
bool QuicSpdyStream::OnHeadersFrameStart(QuicByteCount header_length,
QuicByteCount payload_length) {
QUICHE_DCHECK(VersionUsesHttp3(transport_version()));
QUICHE_DCHECK(!qpack_decoded_headers_accumulator_);
if (spdy_session_->debug_visitor()) {
spdy_session_->debug_visitor()->OnHeadersFrameReceived(id(),
payload_length);
}
headers_payload_length_ = payload_length;
if (trailers_decompressed_) {
stream_delegate()->OnStreamError(
QUIC_HTTP_INVALID_FRAME_SEQUENCE_ON_SPDY_STREAM,
"HEADERS frame received after trailing HEADERS.");
return false;
}
sequencer()->MarkConsumed(body_manager_.OnNonBody(header_length));
qpack_decoded_headers_accumulator_ =
std::make_unique<QpackDecodedHeadersAccumulator>(
id(), spdy_session_->qpack_decoder(), this,
spdy_session_->max_inbound_header_list_size());
return true;
}
bool QuicSpdyStream::OnHeadersFramePayload(absl::string_view payload) {
QUICHE_DCHECK(VersionUsesHttp3(transport_version()));
if (!qpack_decoded_headers_accumulator_) {
QUIC_BUG(b215142466_OnHeadersFramePayload);
OnHeaderDecodingError(QUIC_INTERNAL_ERROR,
"qpack_decoded_headers_accumulator_ is nullptr");
return false;
}
qpack_decoded_headers_accumulator_->Decode(payload);
// |qpack_decoded_headers_accumulator_| is reset if an error is detected.
if (!qpack_decoded_headers_accumulator_) {
return false;
}
sequencer()->MarkConsumed(body_manager_.OnNonBody(payload.size()));
return true;
}
bool QuicSpdyStream::OnHeadersFrameEnd() {
QUICHE_DCHECK(VersionUsesHttp3(transport_version()));
if (!qpack_decoded_headers_accumulator_) {
QUIC_BUG(b215142466_OnHeadersFrameEnd);
OnHeaderDecodingError(QUIC_INTERNAL_ERROR,
"qpack_decoded_headers_accumulator_ is nullptr");
return false;
}
qpack_decoded_headers_accumulator_->EndHeaderBlock();
// If decoding is complete or an error is detected, then
// |qpack_decoded_headers_accumulator_| is already reset.
if (qpack_decoded_headers_accumulator_) {
blocked_on_decoding_headers_ = true;
return false;
}
return !sequencer()->IsClosed() && !reading_stopped();
}
void QuicSpdyStream::OnWebTransportStreamFrameType(
QuicByteCount header_length, WebTransportSessionId session_id) {
QUIC_DVLOG(1) << ENDPOINT << " Received WEBTRANSPORT_STREAM on stream "
<< id() << " for session " << session_id;
sequencer()->MarkConsumed(header_length);
if (headers_payload_length_ > 0 || headers_decompressed_) {
QUIC_PEER_BUG(WEBTRANSPORT_STREAM received on HTTP request)
<< ENDPOINT << "Stream " << id()
<< " tried to convert to WebTransport, but it already "
"has HTTP data on it";
Reset(QUIC_STREAM_FRAME_UNEXPECTED);
}
if (QuicUtils::IsOutgoingStreamId(spdy_session_->version(), id(),
spdy_session_->perspective())) {
QUIC_PEER_BUG(WEBTRANSPORT_STREAM received on outgoing request)
<< ENDPOINT << "Stream " << id()
<< " tried to convert to WebTransport, but only the "
"initiator of the stream can do it.";
Reset(QUIC_STREAM_FRAME_UNEXPECTED);
}
QUICHE_DCHECK(web_transport_ == nullptr);
web_transport_data_ =
std::make_unique<WebTransportDataStream>(this, session_id);
spdy_session_->AssociateIncomingWebTransportStreamWithSession(session_id,
id());
}
bool QuicSpdyStream::OnUnknownFrameStart(uint64_t frame_type,
QuicByteCount header_length,
QuicByteCount payload_length) {
if (spdy_session_->debug_visitor()) {
spdy_session_->debug_visitor()->OnUnknownFrameReceived(id(), frame_type,
payload_length);
}
spdy_session_->OnUnknownFrameStart(id(), frame_type, header_length,
payload_length);
// Consume the frame header.
QUIC_DVLOG(1) << ENDPOINT << "Consuming " << header_length
<< " byte long frame header of frame of unknown type "
<< frame_type << ".";
sequencer()->MarkConsumed(body_manager_.OnNonBody(header_length));
return true;
}
bool QuicSpdyStream::OnUnknownFramePayload(absl::string_view payload) {
spdy_session_->OnUnknownFramePayload(id(), payload);
// Consume the frame payload.
QUIC_DVLOG(1) << ENDPOINT << "Consuming " << payload.size()
<< " bytes of payload of frame of unknown type.";
sequencer()->MarkConsumed(body_manager_.OnNonBody(payload.size()));
return true;
}
bool QuicSpdyStream::OnUnknownFrameEnd() { return true; }
size_t QuicSpdyStream::WriteHeadersImpl(
spdy::Http2HeaderBlock header_block, bool fin,
quiche::QuicheReferenceCountedPointer<QuicAckListenerInterface>
ack_listener) {
if (!VersionUsesHttp3(transport_version())) {
return spdy_session_->WriteHeadersOnHeadersStream(
id(), std::move(header_block), fin, precedence(),
std::move(ack_listener));
}
// Encode header list.
QuicByteCount encoder_stream_sent_byte_count;
std::string encoded_headers =
spdy_session_->qpack_encoder()->EncodeHeaderList(
id(), header_block, &encoder_stream_sent_byte_count);
if (spdy_session_->debug_visitor()) {
spdy_session_->debug_visitor()->OnHeadersFrameSent(id(), header_block);
}
// Write HEADERS frame.
std::string headers_frame_header =
HttpEncoder::SerializeHeadersFrameHeader(encoded_headers.size());
unacked_frame_headers_offsets_.Add(
send_buffer().stream_offset(),
send_buffer().stream_offset() + headers_frame_header.length());
QUIC_DLOG(INFO) << ENDPOINT << "Stream " << id()
<< " is writing HEADERS frame header of length "
<< headers_frame_header.length();
WriteOrBufferData(headers_frame_header, /* fin = */ false,
/* ack_listener = */ nullptr);
QUIC_DLOG(INFO) << ENDPOINT << "Stream " << id()
<< " is writing HEADERS frame payload of length "
<< encoded_headers.length() << " with fin " << fin;
WriteOrBufferData(encoded_headers, fin, nullptr);
QuicSpdySession::LogHeaderCompressionRatioHistogram(
/* using_qpack = */ true,
/* is_sent = */ true,
encoded_headers.size() + encoder_stream_sent_byte_count,
header_block.TotalBytesUsed());
return encoded_headers.size();
}
bool QuicSpdyStream::CanWriteNewBodyData(QuicByteCount write_size) const {
QUICHE_DCHECK_NE(0u, write_size);
if (!VersionUsesHttp3(transport_version())) {
return CanWriteNewData();
}
return CanWriteNewDataAfterData(
HttpEncoder::GetDataFrameHeaderLength(write_size));
}
void QuicSpdyStream::MaybeProcessReceivedWebTransportHeaders() {
if (!spdy_session_->SupportsWebTransport()) {
return;
}
if (session()->perspective() != Perspective::IS_SERVER) {
return;
}
QUICHE_DCHECK(IsValidWebTransportSessionId(id(), version()));
std::string method;
std::string protocol;
for (const auto& [header_name, header_value] : header_list_) {
if (header_name == ":method") {
if (!method.empty() || header_value.empty()) {
return;
}
method = header_value;
}
if (header_name == ":protocol") {
if (!protocol.empty() || header_value.empty()) {
return;
}
protocol = header_value;
}
if (header_name == "datagram-flow-id") {
QUIC_DLOG(ERROR) << ENDPOINT
<< "Rejecting WebTransport due to unexpected "
"Datagram-Flow-Id header";
return;
}
if (header_name == "sec-webtransport-http3-draft02") {
if (header_value != "1") {
QUIC_DLOG(ERROR) << ENDPOINT
<< "Rejecting WebTransport due to invalid value of "
"Sec-Webtransport-Http3-Draft02 header";
return;
}
}
}
if (method != "CONNECT" || protocol != "webtransport") {
return;
}
web_transport_ =
std::make_unique<WebTransportHttp3>(spdy_session_, this, id());
}
void QuicSpdyStream::MaybeProcessSentWebTransportHeaders(
spdy::Http2HeaderBlock& headers) {
if (!spdy_session_->SupportsWebTransport()) {
return;
}
if (session()->perspective() != Perspective::IS_CLIENT) {
return;
}
QUICHE_DCHECK(IsValidWebTransportSessionId(id(), version()));
const auto method_it = headers.find(":method");
const auto protocol_it = headers.find(":protocol");
if (method_it == headers.end() || protocol_it == headers.end()) {
return;
}
if (method_it->second != "CONNECT" && protocol_it->second != "webtransport") {
return;
}
headers["sec-webtransport-http3-draft02"] = "1";
web_transport_ =
std::make_unique<WebTransportHttp3>(spdy_session_, this, id());
}
void QuicSpdyStream::OnCanWriteNewData() {
if (web_transport_data_ != nullptr) {
web_transport_data_->adapter.OnCanWriteNewData();
}
}
bool QuicSpdyStream::AssertNotWebTransportDataStream(
absl::string_view operation) {
if (web_transport_data_ != nullptr) {
QUIC_BUG(Invalid operation on WebTransport stream)
<< "Attempted to " << operation << " on WebTransport data stream "
<< id() << " associated with session "
<< web_transport_data_->session_id;
OnUnrecoverableError(QUIC_INTERNAL_ERROR,
absl::StrCat("Attempted to ", operation,
" on WebTransport data stream"));
return false;
}
return true;
}
void QuicSpdyStream::ConvertToWebTransportDataStream(
WebTransportSessionId session_id) {
if (send_buffer().stream_offset() != 0) {
QUIC_BUG(Sending WEBTRANSPORT_STREAM when data already sent)
<< "Attempted to send a WEBTRANSPORT_STREAM frame when other data has "
"already been sent on the stream.";
OnUnrecoverableError(QUIC_INTERNAL_ERROR,
"Attempted to send a WEBTRANSPORT_STREAM frame when "
"other data has already been sent on the stream.");
return;
}
std::string header =
HttpEncoder::SerializeWebTransportStreamFrameHeader(session_id);
if (header.empty()) {
QUIC_BUG(Failed to serialize WEBTRANSPORT_STREAM)
<< "Failed to serialize a WEBTRANSPORT_STREAM frame.";
OnUnrecoverableError(QUIC_INTERNAL_ERROR,
"Failed to serialize a WEBTRANSPORT_STREAM frame.");
return;
}
WriteOrBufferData(header, /*fin=*/false, nullptr);
web_transport_data_ =
std::make_unique<WebTransportDataStream>(this, session_id);
QUIC_DVLOG(1) << ENDPOINT << "Successfully opened WebTransport data stream "
<< id() << " for session " << session_id;
}
QuicSpdyStream::WebTransportDataStream::WebTransportDataStream(
QuicSpdyStream* stream, WebTransportSessionId session_id)
: session_id(session_id),
adapter(stream->spdy_session_, stream, stream->sequencer()) {}
void QuicSpdyStream::HandleReceivedDatagram(absl::string_view payload) {
if (datagram_visitor_ == nullptr) {
QUIC_DLOG(ERROR) << ENDPOINT << "Received datagram without any visitor";
return;
}
datagram_visitor_->OnHttp3Datagram(id(), payload);
}
bool QuicSpdyStream::OnCapsule(const Capsule& capsule) {
QUIC_DLOG(INFO) << ENDPOINT << "Stream " << id() << " received capsule "
<< capsule;
if (!headers_decompressed_) {
QUIC_PEER_BUG(capsule before headers)
<< ENDPOINT << "Stream " << id() << " received capsule " << capsule
<< " before headers";
return false;
}
if (web_transport_ != nullptr && web_transport_->close_received()) {
QUIC_PEER_BUG(capsule after close)
<< ENDPOINT << "Stream " << id() << " received capsule " << capsule
<< " after CLOSE_WEBTRANSPORT_SESSION.";
return false;
}
switch (capsule.capsule_type()) {
case CapsuleType::LEGACY_DATAGRAM: {
HandleReceivedDatagram(
capsule.legacy_datagram_capsule().http_datagram_payload);
} break;
case CapsuleType::DATAGRAM_WITHOUT_CONTEXT: {
HandleReceivedDatagram(
capsule.datagram_without_context_capsule().http_datagram_payload);
} break;
case CapsuleType::CLOSE_WEBTRANSPORT_SESSION: {
if (web_transport_ == nullptr) {
QUIC_DLOG(ERROR) << ENDPOINT << "Received capsule " << capsule
<< " for a non-WebTransport stream.";
return false;
}
web_transport_->OnCloseReceived(
capsule.close_web_transport_session_capsule().error_code,
capsule.close_web_transport_session_capsule().error_message);
} break;
case CapsuleType::ADDRESS_ASSIGN:
if (connect_ip_visitor_ == nullptr) {
return true;
}
return connect_ip_visitor_->OnAddressAssignCapsule(
capsule.address_assign_capsule());
case CapsuleType::ADDRESS_REQUEST:
if (connect_ip_visitor_ == nullptr) {
return true;
}
return connect_ip_visitor_->OnAddressRequestCapsule(
capsule.address_request_capsule());
case CapsuleType::ROUTE_ADVERTISEMENT:
if (connect_ip_visitor_ == nullptr) {
return true;
}
return connect_ip_visitor_->OnRouteAdvertisementCapsule(
capsule.route_advertisement_capsule());
}
return true;
}
void QuicSpdyStream::OnCapsuleParseFailure(const std::string& error_message) {
QUIC_DLOG(ERROR) << ENDPOINT << "Capsule parse failure: " << error_message;
Reset(QUIC_BAD_APPLICATION_PAYLOAD);
}
void QuicSpdyStream::WriteCapsule(const Capsule& capsule, bool fin) {
QUIC_DLOG(INFO) << ENDPOINT << "Stream " << id() << " sending capsule "
<< capsule;
quiche::QuicheBuffer serialized_capsule = SerializeCapsule(
capsule,
spdy_session_->connection()->helper()->GetStreamSendBufferAllocator());
QUICHE_DCHECK_GT(serialized_capsule.size(), 0u);
WriteOrBufferBody(serialized_capsule.AsStringView(), /*fin=*/fin);
}
void QuicSpdyStream::WriteGreaseCapsule() {
// GREASE capsulde IDs have a form of 41 * N + 23.
QuicRandom* random = spdy_session_->connection()->random_generator();
uint64_t type = random->InsecureRandUint64() >> 4;
type = (type / 41) * 41 + 23;
QUICHE_DCHECK_EQ((type - 23) % 41, 0u);
constexpr size_t kMaxLength = 64;
size_t length = random->InsecureRandUint64() % kMaxLength;
std::string bytes(length, '\0');
random->InsecureRandBytes(&bytes[0], bytes.size());
Capsule capsule = Capsule::Unknown(type, bytes);
WriteCapsule(capsule, /*fin=*/false);
}
MessageStatus QuicSpdyStream::SendHttp3Datagram(absl::string_view payload) {
return spdy_session_->SendHttp3Datagram(id(), payload);
}
void QuicSpdyStream::RegisterHttp3DatagramVisitor(
Http3DatagramVisitor* visitor) {
if (visitor == nullptr) {
QUIC_BUG(null datagram visitor)
<< ENDPOINT << "Null datagram visitor for stream ID " << id();
return;
}
QUIC_DLOG(INFO) << ENDPOINT << "Registering datagram visitor with stream ID "
<< id();
if (datagram_visitor_ != nullptr) {
QUIC_BUG(h3 datagram double registration)
<< ENDPOINT
<< "Attempted to doubly register HTTP/3 datagram with stream ID "
<< id();
return;
}
datagram_visitor_ = visitor;
QUICHE_DCHECK(!capsule_parser_);
capsule_parser_ = std::make_unique<CapsuleParser>(this);
}
void QuicSpdyStream::UnregisterHttp3DatagramVisitor() {
if (datagram_visitor_ == nullptr) {
QUIC_BUG(datagram visitor empty during unregistration)
<< ENDPOINT << "Cannot unregister datagram visitor for stream ID "
<< id();
return;
}
QUIC_DLOG(INFO) << ENDPOINT << "Unregistering datagram visitor for stream ID "
<< id();
datagram_visitor_ = nullptr;
}
void QuicSpdyStream::ReplaceHttp3DatagramVisitor(
Http3DatagramVisitor* visitor) {
QUIC_BUG_IF(h3 datagram unknown move, datagram_visitor_ == nullptr)
<< "Attempted to move missing datagram visitor on HTTP/3 stream ID "
<< id();
datagram_visitor_ = visitor;
}
void QuicSpdyStream::RegisterConnectIpVisitor(ConnectIpVisitor* visitor) {
if (visitor == nullptr) {
QUIC_BUG(null connect - ip visitor)
<< ENDPOINT << "Null connect-ip visitor for stream ID " << id();
return;
}
QUIC_DLOG(INFO) << ENDPOINT
<< "Registering CONNECT-IP visitor with stream ID " << id();
if (connect_ip_visitor_ != nullptr) {
QUIC_BUG(connect - ip double registration)
<< ENDPOINT << "Attempted to doubly register CONNECT-IP with stream ID "
<< id();
return;
}
connect_ip_visitor_ = visitor;
}
void QuicSpdyStream::UnregisterConnectIpVisitor() {
if (connect_ip_visitor_ == nullptr) {
QUIC_BUG(connect - ip visitor empty during unregistration)
<< ENDPOINT << "Cannot unregister CONNECT-IP visitor for stream ID "
<< id();
return;
}
QUIC_DLOG(INFO) << ENDPOINT
<< "Unregistering CONNECT-IP visitor for stream ID " << id();
connect_ip_visitor_ = nullptr;
}
void QuicSpdyStream::ReplaceConnectIpVisitor(ConnectIpVisitor* visitor) {
QUIC_BUG_IF(connect - ip unknown move, connect_ip_visitor_ == nullptr)
<< "Attempted to move missing CONNECT-IP visitor on HTTP/3 stream ID "
<< id();
connect_ip_visitor_ = visitor;
}
void QuicSpdyStream::SetMaxDatagramTimeInQueue(
QuicTime::Delta max_time_in_queue) {
spdy_session_->SetMaxDatagramTimeInQueueForStreamId(id(), max_time_in_queue);
}
void QuicSpdyStream::OnDatagramReceived(QuicDataReader* reader) {
if (!headers_decompressed_) {
QUIC_DLOG(INFO) << "Dropping datagram received before headers on stream ID "
<< id();
return;
}
HandleReceivedDatagram(reader->ReadRemainingPayload());
}
QuicByteCount QuicSpdyStream::GetMaxDatagramSize() const {
QuicByteCount prefix_size = 0;
switch (spdy_session_->http_datagram_support()) {
case HttpDatagramSupport::kDraft04:
case HttpDatagramSupport::kDraft09:
prefix_size =
QuicDataWriter::GetVarInt62Len(id() / kHttpDatagramStreamIdDivisor);
break;
case HttpDatagramSupport::kNone:
case HttpDatagramSupport::kDraft04And09:
QUIC_BUG(GetMaxDatagramSize called with no datagram support)
<< "GetMaxDatagramSize() called when no HTTP/3 datagram support has "
"been negotiated. Support value: "
<< spdy_session_->http_datagram_support();
break;
}
// If the logic above fails, use the largest possible value as the safe one.
if (prefix_size == 0) {
prefix_size = 8;
}
QuicByteCount max_datagram_size =
session()->GetGuaranteedLargestMessagePayload();
if (max_datagram_size < prefix_size) {
QUIC_BUG(max_datagram_size smaller than prefix_size)
<< "GetGuaranteedLargestMessagePayload() returned a datagram size that "
"is not sufficient to fit stream ID into it.";
return 0;
}
return max_datagram_size - prefix_size;
}
void QuicSpdyStream::HandleBodyAvailable() {
if (!capsule_parser_) {
OnBodyAvailable();
return;
}
while (body_manager_.HasBytesToRead()) {
iovec iov;
int num_iov = GetReadableRegions(&iov, /*iov_len=*/1);
if (num_iov == 0) {
break;
}
if (!capsule_parser_->IngestCapsuleFragment(absl::string_view(
reinterpret_cast<const char*>(iov.iov_base), iov.iov_len))) {
break;
}
MarkConsumed(iov.iov_len);
}
// If we received a FIN, make sure that there isn't a partial capsule buffered
// in the capsule parser.
if (sequencer()->IsClosed()) {
capsule_parser_->ErrorIfThereIsRemainingBufferedData();
if (web_transport_ != nullptr) {
web_transport_->OnConnectStreamFinReceived();
}
OnFinRead();
}
}
namespace {
// Return true if |c| is not allowed in an HTTP/3 wire-encoded header and
// pseudo-header names according to
// https://datatracker.ietf.org/doc/html/draft-ietf-quic-http#section-4.1.1 and
// https://datatracker.ietf.org/doc/html/draft-ietf-httpbis-semantics-19#section-5.6.2
constexpr bool isInvalidHeaderNameCharacter(unsigned char c) {
if (c == '!' || c == '|' || c == '~' || c == '*' || c == '+' || c == '-' ||
c == '.' ||
// #, $, %, &, '
(c >= '#' && c <= '\'') ||
// [0-9], :
(c >= '0' && c <= ':') ||
// ^, _, `, [a-z]
(c >= '^' && c <= 'z')) {
return false;
}
return true;
}
} // namespace
bool QuicSpdyStream::AreHeadersValid(const QuicHeaderList& header_list) const {
QUICHE_DCHECK(GetQuicReloadableFlag(quic_verify_request_headers_2));
for (const std::pair<std::string, std::string>& pair : header_list) {
const std::string& name = pair.first;
if (std::any_of(name.begin(), name.end(), isInvalidHeaderNameCharacter)) {
QUIC_DLOG(ERROR) << "Invalid request header " << name;
return false;
}
if (http2::GetInvalidHttp2HeaderSet().contains(name)) {
QUIC_DLOG(ERROR) << name << " header is not allowed";
return false;
}
}
return true;
}
bool QuicSpdyStream::AreHeaderFieldValuesValid(
const QuicHeaderList& header_list) const {
if (!VersionUsesHttp3(transport_version())) {
return true;
}
// According to https://www.rfc-editor.org/rfc/rfc9114.html#section-10.3
// "[...] HTTP/3 can transport field values that are not valid. While most
// values that can be encoded will not alter field parsing, carriage return
// (ASCII 0x0d), line feed (ASCII 0x0a), and the null character (ASCII 0x00)
// might be exploited by an attacker if they are translated verbatim. Any
// request or response that contains a character not permitted in a field
// value MUST be treated as malformed.
// [...]"
for (const std::pair<std::string, std::string>& pair : header_list) {
const std::string& value = pair.second;
for (const auto c : value) {
if (c == '\0' || c == '\n' || c == '\r') {
return false;
}
}
}
return true;
}
void QuicSpdyStream::OnInvalidHeaders() { Reset(QUIC_BAD_APPLICATION_PAYLOAD); }
#undef ENDPOINT // undef for jumbo builds
} // namespace quic