blob: 3c6546fb8f373d9131c2cc61590afad3d841f79d [file] [log] [blame]
// Copyright 2019 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 "quic/core/http/quic_receive_control_stream.h"
#include <utility>
#include "absl/strings/numbers.h"
#include "absl/strings/str_split.h"
#include "absl/strings/string_view.h"
#include "quic/core/http/http_constants.h"
#include "quic/core/http/http_decoder.h"
#include "quic/core/http/quic_spdy_session.h"
#include "quic/core/quic_types.h"
#include "quic/platform/api/quic_flag_utils.h"
#include "quic/platform/api/quic_flags.h"
#include "common/quiche_text_utils.h"
namespace quic {
QuicReceiveControlStream::QuicReceiveControlStream(
PendingStream* pending,
QuicSpdySession* spdy_session)
: QuicStream(pending,
spdy_session,
/*is_static=*/true),
settings_frame_received_(false),
decoder_(this),
spdy_session_(spdy_session) {
sequencer()->set_level_triggered(true);
}
QuicReceiveControlStream::~QuicReceiveControlStream() {}
void QuicReceiveControlStream::OnStreamReset(
const QuicRstStreamFrame& /*frame*/) {
stream_delegate()->OnStreamError(
QUIC_HTTP_CLOSED_CRITICAL_STREAM,
"RESET_STREAM received for receive control stream");
}
void QuicReceiveControlStream::OnDataAvailable() {
iovec iov;
while (!reading_stopped() && decoder_.error() == QUIC_NO_ERROR &&
sequencer()->GetReadableRegion(&iov)) {
QUICHE_DCHECK(!sequencer()->IsClosed());
QuicByteCount processed_bytes = decoder_.ProcessInput(
reinterpret_cast<const char*>(iov.iov_base), iov.iov_len);
sequencer()->MarkConsumed(processed_bytes);
if (!session()->connection()->connected()) {
return;
}
// The only reason QuicReceiveControlStream pauses HttpDecoder is an error,
// in which case the connection would have already been closed.
QUICHE_DCHECK_EQ(iov.iov_len, processed_bytes);
}
}
void QuicReceiveControlStream::OnError(HttpDecoder* decoder) {
stream_delegate()->OnStreamError(decoder->error(), decoder->error_detail());
}
bool QuicReceiveControlStream::OnMaxPushIdFrame(const MaxPushIdFrame& frame) {
if (spdy_session()->debug_visitor()) {
spdy_session()->debug_visitor()->OnMaxPushIdFrameReceived(frame);
}
if (!ValidateFrameType(HttpFrameType::MAX_PUSH_ID)) {
return false;
}
return spdy_session()->OnMaxPushIdFrame(frame.push_id);
}
bool QuicReceiveControlStream::OnGoAwayFrame(const GoAwayFrame& frame) {
if (spdy_session()->debug_visitor()) {
spdy_session()->debug_visitor()->OnGoAwayFrameReceived(frame);
}
if (!ValidateFrameType(HttpFrameType::GOAWAY)) {
return false;
}
spdy_session()->OnHttp3GoAway(frame.id);
return true;
}
bool QuicReceiveControlStream::OnSettingsFrameStart(
QuicByteCount /*header_length*/) {
return ValidateFrameType(HttpFrameType::SETTINGS);
}
bool QuicReceiveControlStream::OnSettingsFrame(const SettingsFrame& frame) {
QUIC_DVLOG(1) << "Control Stream " << id()
<< " received settings frame: " << frame;
return spdy_session_->OnSettingsFrame(frame);
}
bool QuicReceiveControlStream::OnDataFrameStart(QuicByteCount /*header_length*/,
QuicByteCount
/*payload_length*/) {
return ValidateFrameType(HttpFrameType::DATA);
}
bool QuicReceiveControlStream::OnDataFramePayload(
absl::string_view /*payload*/) {
QUICHE_NOTREACHED();
return false;
}
bool QuicReceiveControlStream::OnDataFrameEnd() {
QUICHE_NOTREACHED();
return false;
}
bool QuicReceiveControlStream::OnHeadersFrameStart(
QuicByteCount /*header_length*/,
QuicByteCount
/*payload_length*/) {
return ValidateFrameType(HttpFrameType::HEADERS);
}
bool QuicReceiveControlStream::OnHeadersFramePayload(
absl::string_view /*payload*/) {
QUICHE_NOTREACHED();
return false;
}
bool QuicReceiveControlStream::OnHeadersFrameEnd() {
QUICHE_NOTREACHED();
return false;
}
bool QuicReceiveControlStream::OnPriorityUpdateFrameStart(
QuicByteCount /*header_length*/) {
return ValidateFrameType(HttpFrameType::PRIORITY_UPDATE_REQUEST_STREAM);
}
bool QuicReceiveControlStream::OnPriorityUpdateFrame(
const PriorityUpdateFrame& frame) {
if (spdy_session()->debug_visitor()) {
spdy_session()->debug_visitor()->OnPriorityUpdateFrameReceived(frame);
}
// TODO(b/147306124): Use a proper structured headers parser instead.
for (absl::string_view key_value :
absl::StrSplit(frame.priority_field_value, ',')) {
std::vector<absl::string_view> key_and_value =
absl::StrSplit(key_value, '=');
if (key_and_value.size() != 2) {
continue;
}
absl::string_view key = key_and_value[0];
quiche::QuicheTextUtils::RemoveLeadingAndTrailingWhitespace(&key);
if (key != "u") {
continue;
}
absl::string_view value = key_and_value[1];
int urgency;
if (!absl::SimpleAtoi(value, &urgency) || urgency < 0 || urgency > 7) {
stream_delegate()->OnStreamError(
QUIC_INVALID_PRIORITY_UPDATE,
"Invalid value for PRIORITY_UPDATE urgency parameter.");
return false;
}
if (frame.prioritized_element_type == REQUEST_STREAM) {
return spdy_session_->OnPriorityUpdateForRequestStream(
frame.prioritized_element_id, urgency);
} else {
return spdy_session_->OnPriorityUpdateForPushStream(
frame.prioritized_element_id, urgency);
}
}
// Ignore frame if no urgency parameter can be parsed.
return true;
}
bool QuicReceiveControlStream::OnAcceptChFrameStart(
QuicByteCount /* header_length */) {
return ValidateFrameType(HttpFrameType::ACCEPT_CH);
}
bool QuicReceiveControlStream::OnAcceptChFrame(const AcceptChFrame& frame) {
QUICHE_DCHECK_EQ(Perspective::IS_CLIENT, spdy_session()->perspective());
if (spdy_session()->debug_visitor()) {
spdy_session()->debug_visitor()->OnAcceptChFrameReceived(frame);
}
spdy_session()->OnAcceptChFrame(frame);
return true;
}
void QuicReceiveControlStream::OnWebTransportStreamFrameType(
QuicByteCount /*header_length*/,
WebTransportSessionId /*session_id*/) {
QUIC_BUG(WEBTRANSPORT_STREAM on Control Stream)
<< "Parsed WEBTRANSPORT_STREAM on a control stream.";
}
bool QuicReceiveControlStream::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);
}
return ValidateFrameType(static_cast<HttpFrameType>(frame_type));
}
bool QuicReceiveControlStream::OnUnknownFramePayload(
absl::string_view /*payload*/) {
// Ignore unknown frame types.
return true;
}
bool QuicReceiveControlStream::OnUnknownFrameEnd() {
// Ignore unknown frame types.
return true;
}
bool QuicReceiveControlStream::ValidateFrameType(HttpFrameType frame_type) {
// Certain frame types are forbidden.
if (frame_type == HttpFrameType::DATA ||
frame_type == HttpFrameType::HEADERS ||
(spdy_session()->perspective() == Perspective::IS_CLIENT &&
frame_type == HttpFrameType::MAX_PUSH_ID) ||
(spdy_session()->perspective() == Perspective::IS_SERVER &&
frame_type == HttpFrameType::ACCEPT_CH)) {
stream_delegate()->OnStreamError(
QUIC_HTTP_FRAME_UNEXPECTED_ON_CONTROL_STREAM,
absl::StrCat("Invalid frame type ", static_cast<int>(frame_type),
" received on control stream."));
return false;
}
if (settings_frame_received_) {
if (frame_type == HttpFrameType::SETTINGS) {
// SETTINGS frame may only be the first frame on the control stream.
stream_delegate()->OnStreamError(
QUIC_HTTP_INVALID_FRAME_SEQUENCE_ON_CONTROL_STREAM,
"SETTINGS frame can only be received once.");
return false;
}
return true;
}
if (frame_type == HttpFrameType::SETTINGS) {
settings_frame_received_ = true;
return true;
}
stream_delegate()->OnStreamError(
QUIC_HTTP_MISSING_SETTINGS_FRAME,
absl::StrCat("First frame received on control stream is type ",
static_cast<int>(frame_type), ", but it must be SETTINGS."));
return false;
}
} // namespace quic