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// Copyright (c) 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 "net/third_party/quiche/src/quic/quic_transport/quic_transport_server_session.h"
#include <memory>
#include "url/gurl.h"
#include "net/third_party/quiche/src/quic/core/quic_error_codes.h"
#include "net/third_party/quiche/src/quic/core/quic_stream.h"
#include "net/third_party/quiche/src/quic/core/quic_types.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_str_cat.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_string_piece.h"
#include "net/third_party/quiche/src/quic/quic_transport/quic_transport_protocol.h"
#include "net/third_party/quiche/src/quic/quic_transport/quic_transport_stream.h"
namespace quic {
namespace {
class QuicTransportServerCryptoHelper : public QuicCryptoServerStream::Helper {
public:
bool CanAcceptClientHello(const CryptoHandshakeMessage& /*message*/,
const QuicSocketAddress& /*client_address*/,
const QuicSocketAddress& /*peer_address*/,
const QuicSocketAddress& /*self_address*/,
std::string* /*error_details*/) const override {
return true;
}
};
} // namespace
QuicTransportServerSession::QuicTransportServerSession(
QuicConnection* connection,
Visitor* owner,
const QuicConfig& config,
const ParsedQuicVersionVector& supported_versions,
const QuicCryptoServerConfig* crypto_config,
QuicCompressedCertsCache* compressed_certs_cache,
ServerVisitor* visitor)
: QuicSession(connection,
owner,
config,
supported_versions,
/*num_expected_unidirectional_static_streams*/ 0),
visitor_(visitor) {
for (const ParsedQuicVersion& version : supported_versions) {
QUIC_BUG_IF(version.handshake_protocol != PROTOCOL_TLS1_3)
<< "QuicTransport requires TLS 1.3 handshake";
}
static QuicTransportServerCryptoHelper* helper =
new QuicTransportServerCryptoHelper();
crypto_stream_ = std::make_unique<QuicCryptoServerStream>(
crypto_config, compressed_certs_cache, this, helper);
}
QuicStream* QuicTransportServerSession::CreateIncomingStream(QuicStreamId id) {
if (id == ClientIndicationStream()) {
auto indication = std::make_unique<ClientIndication>(this);
ClientIndication* indication_ptr = indication.get();
ActivateStream(std::move(indication));
return indication_ptr;
}
auto stream = std::make_unique<QuicTransportStream>(id, this, this);
QuicTransportStream* stream_ptr = stream.get();
ActivateStream(std::move(stream));
OnIncomingDataStream(stream_ptr);
return stream_ptr;
}
QuicTransportServerSession::ClientIndication::ClientIndication(
QuicTransportServerSession* session)
: QuicStream(ClientIndicationStream(),
session,
/* is_static= */ false,
StreamType::READ_UNIDIRECTIONAL),
session_(session) {}
void QuicTransportServerSession::ClientIndication::OnDataAvailable() {
sequencer()->Read(&buffer_);
if (buffer_.size() > ClientIndicationMaxSize()) {
session_->connection()->CloseConnection(
QUIC_TRANSPORT_INVALID_CLIENT_INDICATION,
QuicStrCat("Client indication size exceeds ", ClientIndicationMaxSize(),
" bytes"),
ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
return;
}
if (sequencer()->IsClosed()) {
session_->ProcessClientIndication(buffer_);
OnFinRead();
}
}
bool QuicTransportServerSession::ClientIndicationParser::Parse() {
bool origin_received = false;
while (!reader_.IsDoneReading()) {
uint16_t key;
if (!reader_.ReadUInt16(&key)) {
ParseError("Expected 16-bit key");
return false;
}
QuicStringPiece value;
if (!reader_.ReadStringPiece16(&value)) {
ParseError(QuicStrCat("Failed to read value for key ", key));
return false;
}
switch (static_cast<QuicTransportClientIndicationKeys>(key)) {
case QuicTransportClientIndicationKeys::kOrigin: {
GURL origin_url{std::string(value)};
if (!origin_url.is_valid()) {
Error("Unable to parse the specified origin");
return false;
}
url::Origin origin = url::Origin::Create(origin_url);
QUIC_DLOG(INFO) << "QuicTransport server received origin " << origin;
if (!session_->visitor_->CheckOrigin(origin)) {
Error("Origin check failed");
return false;
}
origin_received = true;
break;
}
default:
QUIC_DLOG(INFO) << "Unknown client indication key: " << key;
break;
}
}
if (!origin_received) {
Error("No origin received");
return false;
}
return true;
}
void QuicTransportServerSession::ClientIndicationParser::Error(
const std::string& error_message) {
session_->connection()->CloseConnection(
QUIC_TRANSPORT_INVALID_CLIENT_INDICATION, error_message,
ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
}
void QuicTransportServerSession::ClientIndicationParser::ParseError(
QuicStringPiece error_message) {
Error(QuicStrCat("Failed to parse the client indication stream: ",
error_message, reader_.DebugString()));
}
void QuicTransportServerSession::ProcessClientIndication(
QuicStringPiece indication) {
ClientIndicationParser parser(this, indication);
if (!parser.Parse()) {
return;
}
// Don't set the ready bit if we closed the connection due to any error
// beforehand.
if (!connection()->connected()) {
return;
}
ready_ = true;
}
} // namespace quic
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