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naiveproxy/net/quic/chromium/quic_chromium_client_session.cc
klzgrad 19bc836227 Import chromium-63.0.3239.132
2018-01-29 00:30:36 +08:00

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// Copyright (c) 2012 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/quic/chromium/quic_chromium_client_session.h"
#include <utility>
#include "base/callback_helpers.h"
#include "base/location.h"
#include "base/memory/ptr_util.h"
#include "base/metrics/histogram_macros.h"
#include "base/metrics/sparse_histogram.h"
#include "base/single_thread_task_runner.h"
#include "base/stl_util.h"
#include "base/strings/string_number_conversions.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/trace_event/memory_usage_estimator.h"
#include "base/values.h"
#include "net/base/io_buffer.h"
#include "net/base/net_errors.h"
#include "net/base/network_activity_monitor.h"
#include "net/http/transport_security_state.h"
#include "net/log/net_log_event_type.h"
#include "net/log/net_log_source_type.h"
#include "net/quic/chromium/crypto/proof_verifier_chromium.h"
#include "net/quic/chromium/quic_chromium_connection_helper.h"
#include "net/quic/chromium/quic_chromium_packet_writer.h"
#include "net/quic/chromium/quic_crypto_client_stream_factory.h"
#include "net/quic/chromium/quic_server_info.h"
#include "net/quic/chromium/quic_stream_factory.h"
#include "net/quic/core/quic_client_promised_info.h"
#include "net/quic/core/spdy_utils.h"
#include "net/quic/platform/api/quic_ptr_util.h"
#include "net/socket/datagram_client_socket.h"
#include "net/spdy/chromium/spdy_http_utils.h"
#include "net/spdy/chromium/spdy_log_util.h"
#include "net/spdy/chromium/spdy_session.h"
#include "net/ssl/channel_id_service.h"
#include "net/ssl/ssl_connection_status_flags.h"
#include "net/ssl/ssl_info.h"
#include "net/ssl/token_binding.h"
#include "third_party/boringssl/src/include/openssl/ssl.h"
namespace net {
namespace {
// IPv6 packets have an additional 20 bytes of overhead than IPv4 packets.
const size_t kAdditionalOverheadForIPv6 = 20;
// Maximum number of Readers that are created for any session due to
// connection migration. A new Reader is created every time this endpoint's
// IP address changes.
const size_t kMaxReadersPerQuicSession = 5;
// Size of the MRU cache of Token Binding signatures. Since the material being
// signed is constant and there aren't many keys being used to sign, a fairly
// small number was chosen, somewhat arbitrarily, and to match
// SSLClientSocketImpl.
const size_t kTokenBindingSignatureMapSize = 10;
// Time to wait (in seconds) when no networks are available and
// migrating sessions need to wait for a new network to connect.
const size_t kWaitTimeForNewNetworkSecs = 10;
// The maximum size of uncompressed QUIC headers that will be allowed.
const size_t kMaxUncompressedHeaderSize = 256 * 1024;
// Histograms for tracking down the crashes from http://crbug.com/354669
// Note: these values must be kept in sync with the corresponding values in:
// tools/metrics/histograms/histograms.xml
enum Location {
DESTRUCTOR = 0,
ADD_OBSERVER = 1,
TRY_CREATE_STREAM = 2,
CREATE_OUTGOING_RELIABLE_STREAM = 3,
NOTIFY_FACTORY_OF_SESSION_CLOSED_LATER = 4,
NOTIFY_FACTORY_OF_SESSION_CLOSED = 5,
NUM_LOCATIONS = 6,
};
void RecordUnexpectedOpenStreams(Location location) {
UMA_HISTOGRAM_ENUMERATION("Net.QuicSession.UnexpectedOpenStreams", location,
NUM_LOCATIONS);
}
void RecordUnexpectedObservers(Location location) {
UMA_HISTOGRAM_ENUMERATION("Net.QuicSession.UnexpectedObservers", location,
NUM_LOCATIONS);
}
void RecordUnexpectedNotGoingAway(Location location) {
UMA_HISTOGRAM_ENUMERATION("Net.QuicSession.UnexpectedNotGoingAway", location,
NUM_LOCATIONS);
}
// Histogram for recording the different reasons that a QUIC session is unable
// to complete the handshake.
enum HandshakeFailureReason {
HANDSHAKE_FAILURE_UNKNOWN = 0,
HANDSHAKE_FAILURE_BLACK_HOLE = 1,
HANDSHAKE_FAILURE_PUBLIC_RESET = 2,
NUM_HANDSHAKE_FAILURE_REASONS = 3,
};
void RecordHandshakeFailureReason(HandshakeFailureReason reason) {
UMA_HISTOGRAM_ENUMERATION(
"Net.QuicSession.ConnectionClose.HandshakeNotConfirmed.Reason", reason,
NUM_HANDSHAKE_FAILURE_REASONS);
}
// Note: these values must be kept in sync with the corresponding values in:
// tools/metrics/histograms/histograms.xml
enum HandshakeState {
STATE_STARTED = 0,
STATE_ENCRYPTION_ESTABLISHED = 1,
STATE_HANDSHAKE_CONFIRMED = 2,
STATE_FAILED = 3,
NUM_HANDSHAKE_STATES = 4
};
void RecordHandshakeState(HandshakeState state) {
UMA_HISTOGRAM_ENUMERATION("Net.QuicHandshakeState", state,
NUM_HANDSHAKE_STATES);
}
std::unique_ptr<base::Value> NetLogQuicClientSessionCallback(
const QuicServerId* server_id,
int cert_verify_flags,
bool require_confirmation,
NetLogCaptureMode /* capture_mode */) {
std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
dict->SetString("host", server_id->host());
dict->SetInteger("port", server_id->port());
dict->SetBoolean("privacy_mode",
server_id->privacy_mode() == PRIVACY_MODE_ENABLED);
dict->SetBoolean("require_confirmation", require_confirmation);
dict->SetInteger("cert_verify_flags", cert_verify_flags);
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogQuicPushPromiseReceivedCallback(
const SpdyHeaderBlock* headers,
SpdyStreamId stream_id,
SpdyStreamId promised_stream_id,
NetLogCaptureMode capture_mode) {
std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
dict->Set("headers", ElideSpdyHeaderBlockForNetLog(*headers, capture_mode));
dict->SetInteger("id", stream_id);
dict->SetInteger("promised_stream_id", promised_stream_id);
return std::move(dict);
}
class HpackEncoderDebugVisitor : public QuicHpackDebugVisitor {
void OnUseEntry(QuicTime::Delta elapsed) override {
UMA_HISTOGRAM_TIMES(
"Net.QuicHpackEncoder.IndexedEntryAge",
base::TimeDelta::FromMicroseconds(elapsed.ToMicroseconds()));
}
};
class HpackDecoderDebugVisitor : public QuicHpackDebugVisitor {
void OnUseEntry(QuicTime::Delta elapsed) override {
UMA_HISTOGRAM_TIMES(
"Net.QuicHpackDecoder.IndexedEntryAge",
base::TimeDelta::FromMicroseconds(elapsed.ToMicroseconds()));
}
};
class QuicServerPushHelper : public ServerPushDelegate::ServerPushHelper {
public:
explicit QuicServerPushHelper(
base::WeakPtr<QuicChromiumClientSession> session,
const GURL& url)
: session_(session), request_url_(url) {}
void Cancel() override {
if (session_) {
session_->CancelPush(request_url_);
}
}
const GURL& GetURL() const override { return request_url_; }
private:
base::WeakPtr<QuicChromiumClientSession> session_;
const GURL request_url_;
};
} // namespace
QuicChromiumClientSession::Handle::Handle(
const base::WeakPtr<QuicChromiumClientSession>& session)
: MultiplexedSessionHandle(session),
session_(session),
net_log_(session_->net_log()),
was_handshake_confirmed_(session->IsCryptoHandshakeConfirmed()),
net_error_(OK),
quic_error_(QUIC_NO_ERROR),
port_migration_detected_(false),
server_id_(session_->server_id()),
quic_version_(session->connection()->transport_version()),
push_handle_(nullptr),
was_ever_used_(false) {
DCHECK(session_);
session_->AddHandle(this);
}
QuicChromiumClientSession::Handle::~Handle() {
if (push_handle_) {
auto* push_handle = push_handle_;
push_handle_ = nullptr;
push_handle->Cancel();
}
if (session_)
session_->RemoveHandle(this);
}
void QuicChromiumClientSession::Handle::OnCryptoHandshakeConfirmed() {
was_handshake_confirmed_ = true;
}
void QuicChromiumClientSession::Handle::OnSessionClosed(
QuicTransportVersion quic_version,
int net_error,
QuicErrorCode quic_error,
bool port_migration_detected,
LoadTimingInfo::ConnectTiming connect_timing,
bool was_ever_used) {
session_ = nullptr;
port_migration_detected_ = port_migration_detected;
net_error_ = net_error;
quic_error_ = quic_error;
quic_version_ = quic_version;
connect_timing_ = connect_timing;
push_handle_ = nullptr;
was_ever_used_ = was_ever_used;
}
bool QuicChromiumClientSession::Handle::IsConnected() const {
return session_ != nullptr;
}
bool QuicChromiumClientSession::Handle::IsCryptoHandshakeConfirmed() const {
return was_handshake_confirmed_;
}
const LoadTimingInfo::ConnectTiming&
QuicChromiumClientSession::Handle::GetConnectTiming() {
if (!session_)
return connect_timing_;
return session_->GetConnectTiming();
}
Error QuicChromiumClientSession::Handle::GetTokenBindingSignature(
crypto::ECPrivateKey* key,
TokenBindingType tb_type,
std::vector<uint8_t>* out) {
if (!session_)
return ERR_CONNECTION_CLOSED;
return session_->GetTokenBindingSignature(key, tb_type, out);
}
void QuicChromiumClientSession::Handle::PopulateNetErrorDetails(
NetErrorDetails* details) const {
if (session_) {
session_->PopulateNetErrorDetails(details);
} else {
details->quic_port_migration_detected = port_migration_detected_;
details->quic_connection_error = quic_error_;
}
}
QuicTransportVersion QuicChromiumClientSession::Handle::GetQuicVersion() const {
if (!session_)
return quic_version_;
return session_->connection()->transport_version();
}
void QuicChromiumClientSession::Handle::ResetPromised(
QuicStreamId id,
QuicRstStreamErrorCode error_code) {
if (session_)
session_->ResetPromised(id, error_code);
}
std::unique_ptr<QuicConnection::ScopedPacketBundler>
QuicChromiumClientSession::Handle::CreatePacketBundler(
QuicConnection::AckBundling bundling_mode) {
if (!session_)
return nullptr;
return std::make_unique<QuicConnection::ScopedPacketBundler>(
session_->connection(), bundling_mode);
}
bool QuicChromiumClientSession::Handle::SharesSameSession(
const Handle& other) const {
return session_.get() == other.session_.get();
}
int QuicChromiumClientSession::Handle::RendezvousWithPromised(
const SpdyHeaderBlock& headers,
const CompletionCallback& callback) {
if (!session_)
return ERR_CONNECTION_CLOSED;
QuicAsyncStatus push_status =
session_->push_promise_index()->Try(headers, this, &push_handle_);
switch (push_status) {
case QUIC_FAILURE:
return ERR_FAILED;
case QUIC_SUCCESS:
return OK;
case QUIC_PENDING:
push_callback_ = callback;
return ERR_IO_PENDING;
}
NOTREACHED();
return ERR_UNEXPECTED;
}
int QuicChromiumClientSession::Handle::RequestStream(
bool requires_confirmation,
const CompletionCallback& callback) {
DCHECK(!stream_request_);
if (!session_)
return ERR_CONNECTION_CLOSED;
// std::make_unique does not work because the StreamRequest constructor
// is private.
stream_request_ = std::unique_ptr<StreamRequest>(
new StreamRequest(this, requires_confirmation));
return stream_request_->StartRequest(callback);
}
std::unique_ptr<QuicChromiumClientStream::Handle>
QuicChromiumClientSession::Handle::ReleaseStream() {
DCHECK(stream_request_);
auto handle = stream_request_->ReleaseStream();
stream_request_.reset();
return handle;
}
std::unique_ptr<QuicChromiumClientStream::Handle>
QuicChromiumClientSession::Handle::ReleasePromisedStream() {
DCHECK(push_stream_);
return std::move(push_stream_);
}
int QuicChromiumClientSession::Handle::WaitForHandshakeConfirmation(
const CompletionCallback& callback) {
if (!session_)
return ERR_CONNECTION_CLOSED;
return session_->WaitForHandshakeConfirmation(callback);
}
void QuicChromiumClientSession::Handle::CancelRequest(StreamRequest* request) {
if (session_)
session_->CancelRequest(request);
}
int QuicChromiumClientSession::Handle::TryCreateStream(StreamRequest* request) {
if (!session_)
return ERR_CONNECTION_CLOSED;
return session_->TryCreateStream(request);
}
QuicClientPushPromiseIndex*
QuicChromiumClientSession::Handle::GetPushPromiseIndex() {
if (!session_)
return push_promise_index_;
return session_->push_promise_index();
}
int QuicChromiumClientSession::Handle::GetPeerAddress(
IPEndPoint* address) const {
if (!session_)
return ERR_CONNECTION_CLOSED;
*address = session_->peer_address().impl().socket_address();
return OK;
}
int QuicChromiumClientSession::Handle::GetSelfAddress(
IPEndPoint* address) const {
if (!session_)
return ERR_CONNECTION_CLOSED;
*address = session_->self_address().impl().socket_address();
return OK;
}
bool QuicChromiumClientSession::Handle::WasEverUsed() const {
if (!session_)
return was_ever_used_;
return session_->WasConnectionEverUsed();
}
bool QuicChromiumClientSession::Handle::CheckVary(
const SpdyHeaderBlock& client_request,
const SpdyHeaderBlock& promise_request,
const SpdyHeaderBlock& promise_response) {
HttpRequestInfo promise_request_info;
ConvertHeaderBlockToHttpRequestHeaders(promise_request,
&promise_request_info.extra_headers);
HttpRequestInfo client_request_info;
ConvertHeaderBlockToHttpRequestHeaders(client_request,
&client_request_info.extra_headers);
HttpResponseInfo promise_response_info;
if (!SpdyHeadersToHttpResponse(promise_response, &promise_response_info)) {
DLOG(WARNING) << "Invalid headers";
return false;
}
HttpVaryData vary_data;
if (!vary_data.Init(promise_request_info,
*promise_response_info.headers.get())) {
// Promise didn't contain valid vary info, so URL match was sufficient.
return true;
}
// Now compare the client request for matching.
return vary_data.MatchesRequest(client_request_info,
*promise_response_info.headers.get());
}
void QuicChromiumClientSession::Handle::OnRendezvousResult(
QuicSpdyStream* stream) {
DCHECK(!push_stream_);
int rv = ERR_FAILED;
if (stream) {
rv = OK;
push_stream_ =
static_cast<QuicChromiumClientStream*>(stream)->CreateHandle();
}
if (push_callback_) {
DCHECK(push_handle_);
push_handle_ = nullptr;
base::ResetAndReturn(&push_callback_).Run(rv);
}
}
QuicChromiumClientSession::StreamRequest::StreamRequest(
QuicChromiumClientSession::Handle* session,
bool requires_confirmation)
: session_(session),
requires_confirmation_(requires_confirmation),
stream_(nullptr),
weak_factory_(this) {}
QuicChromiumClientSession::StreamRequest::~StreamRequest() {
if (stream_)
stream_->Reset(QUIC_STREAM_CANCELLED);
if (session_)
session_->CancelRequest(this);
}
int QuicChromiumClientSession::StreamRequest::StartRequest(
const CompletionCallback& callback) {
if (!session_->IsConnected())
return ERR_CONNECTION_CLOSED;
next_state_ = STATE_WAIT_FOR_CONFIRMATION;
int rv = DoLoop(OK);
if (rv == ERR_IO_PENDING)
callback_ = callback;
return rv;
}
std::unique_ptr<QuicChromiumClientStream::Handle>
QuicChromiumClientSession::StreamRequest::ReleaseStream() {
DCHECK(stream_);
return std::move(stream_);
}
void QuicChromiumClientSession::StreamRequest::OnRequestCompleteSuccess(
std::unique_ptr<QuicChromiumClientStream::Handle> stream) {
DCHECK_EQ(STATE_REQUEST_STREAM_COMPLETE, next_state_);
stream_ = std::move(stream);
// This method is called even when the request completes synchronously.
if (callback_)
DoCallback(OK);
}
void QuicChromiumClientSession::StreamRequest::OnRequestCompleteFailure(
int rv) {
DCHECK_EQ(STATE_REQUEST_STREAM_COMPLETE, next_state_);
// This method is called even when the request completes synchronously.
if (callback_) {
// Avoid re-entrancy if the callback calls into the session.
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE,
base::Bind(&QuicChromiumClientSession::StreamRequest::DoCallback,
weak_factory_.GetWeakPtr(), rv));
}
}
void QuicChromiumClientSession::StreamRequest::OnIOComplete(int rv) {
rv = DoLoop(rv);
if (rv != ERR_IO_PENDING && !callback_.is_null()) {
DoCallback(rv);
}
}
void QuicChromiumClientSession::StreamRequest::DoCallback(int rv) {
CHECK_NE(rv, ERR_IO_PENDING);
CHECK(!callback_.is_null());
// The client callback can do anything, including destroying this class,
// so any pending callback must be issued after everything else is done.
base::ResetAndReturn(&callback_).Run(rv);
}
int QuicChromiumClientSession::StreamRequest::DoLoop(int rv) {
do {
State state = next_state_;
next_state_ = STATE_NONE;
switch (state) {
case STATE_WAIT_FOR_CONFIRMATION:
CHECK_EQ(OK, rv);
rv = DoWaitForConfirmation();
break;
case STATE_WAIT_FOR_CONFIRMATION_COMPLETE:
rv = DoWaitForConfirmationComplete(rv);
break;
case STATE_REQUEST_STREAM:
CHECK_EQ(OK, rv);
rv = DoRequestStream();
break;
case STATE_REQUEST_STREAM_COMPLETE:
rv = DoRequestStreamComplete(rv);
break;
default:
NOTREACHED() << "next_state_: " << next_state_;
break;
}
} while (next_state_ != STATE_NONE && next_state_ && rv != ERR_IO_PENDING);
return rv;
}
int QuicChromiumClientSession::StreamRequest::DoWaitForConfirmation() {
next_state_ = STATE_WAIT_FOR_CONFIRMATION_COMPLETE;
if (requires_confirmation_) {
return session_->WaitForHandshakeConfirmation(
base::Bind(&QuicChromiumClientSession::StreamRequest::OnIOComplete,
weak_factory_.GetWeakPtr()));
}
return OK;
}
int QuicChromiumClientSession::StreamRequest::DoWaitForConfirmationComplete(
int rv) {
DCHECK_NE(ERR_IO_PENDING, rv);
if (rv < 0)
return rv;
next_state_ = STATE_REQUEST_STREAM;
return OK;
}
int QuicChromiumClientSession::StreamRequest::DoRequestStream() {
next_state_ = STATE_REQUEST_STREAM_COMPLETE;
return session_->TryCreateStream(this);
}
int QuicChromiumClientSession::StreamRequest::DoRequestStreamComplete(int rv) {
DCHECK(rv == OK || !stream_);
return rv;
}
QuicChromiumClientSession::QuicChromiumClientSession(
QuicConnection* connection,
std::unique_ptr<DatagramClientSocket> socket,
QuicStreamFactory* stream_factory,
QuicCryptoClientStreamFactory* crypto_client_stream_factory,
QuicClock* clock,
TransportSecurityState* transport_security_state,
std::unique_ptr<QuicServerInfo> server_info,
const QuicServerId& server_id,
bool require_confirmation,
int yield_after_packets,
QuicTime::Delta yield_after_duration,
int cert_verify_flags,
const QuicConfig& config,
QuicCryptoClientConfig* crypto_config,
const char* const connection_description,
base::TimeTicks dns_resolution_start_time,
base::TimeTicks dns_resolution_end_time,
QuicClientPushPromiseIndex* push_promise_index,
ServerPushDelegate* push_delegate,
base::TaskRunner* task_runner,
std::unique_ptr<SocketPerformanceWatcher> socket_performance_watcher,
NetLog* net_log)
: QuicSpdyClientSessionBase(connection, push_promise_index, config),
server_id_(server_id),
require_confirmation_(require_confirmation),
stream_factory_(stream_factory),
transport_security_state_(transport_security_state),
server_info_(std::move(server_info)),
pkp_bypassed_(false),
num_total_streams_(0),
task_runner_(task_runner),
net_log_(NetLogWithSource::Make(net_log, NetLogSourceType::QUIC_SESSION)),
logger_(new QuicConnectionLogger(this,
connection_description,
std::move(socket_performance_watcher),
net_log_)),
going_away_(false),
port_migration_detected_(false),
token_binding_signatures_(kTokenBindingSignatureMapSize),
push_delegate_(push_delegate),
streams_pushed_count_(0),
streams_pushed_and_claimed_count_(0),
bytes_pushed_count_(0),
bytes_pushed_and_unclaimed_count_(0),
migration_pending_(false),
weak_factory_(this) {
sockets_.push_back(std::move(socket));
packet_readers_.push_back(std::make_unique<QuicChromiumPacketReader>(
sockets_.back().get(), clock, this, yield_after_packets,
yield_after_duration, net_log_));
crypto_stream_.reset(
crypto_client_stream_factory->CreateQuicCryptoClientStream(
server_id, this,
std::make_unique<ProofVerifyContextChromium>(cert_verify_flags,
net_log_),
crypto_config));
connection->set_debug_visitor(logger_.get());
connection->set_creator_debug_delegate(logger_.get());
net_log_.BeginEvent(NetLogEventType::QUIC_SESSION,
base::Bind(NetLogQuicClientSessionCallback, &server_id,
cert_verify_flags, require_confirmation_));
IPEndPoint address;
if (socket && socket->GetLocalAddress(&address) == OK &&
address.GetFamily() == ADDRESS_FAMILY_IPV6) {
connection->SetMaxPacketLength(connection->max_packet_length() -
kAdditionalOverheadForIPv6);
}
connect_timing_.dns_start = dns_resolution_start_time;
connect_timing_.dns_end = dns_resolution_end_time;
}
QuicChromiumClientSession::~QuicChromiumClientSession() {
DCHECK(callback_.is_null());
net_log_.EndEvent(NetLogEventType::QUIC_SESSION);
DCHECK(waiting_for_confirmation_callbacks_.empty());
if (!dynamic_streams().empty())
RecordUnexpectedOpenStreams(DESTRUCTOR);
if (!handles_.empty())
RecordUnexpectedObservers(DESTRUCTOR);
if (!going_away_)
RecordUnexpectedNotGoingAway(DESTRUCTOR);
while (!dynamic_streams().empty() || !handles_.empty() ||
!stream_requests_.empty()) {
// The session must be closed before it is destroyed.
DCHECK(dynamic_streams().empty());
CloseAllStreams(ERR_UNEXPECTED);
DCHECK(handles_.empty());
CloseAllHandles(ERR_UNEXPECTED);
CancelAllRequests(ERR_UNEXPECTED);
connection()->set_debug_visitor(nullptr);
}
if (connection()->connected()) {
// Ensure that the connection is closed by the time the session is
// destroyed.
connection()->CloseConnection(QUIC_INTERNAL_ERROR, "session torn down",
ConnectionCloseBehavior::SILENT_CLOSE);
}
if (IsEncryptionEstablished())
RecordHandshakeState(STATE_ENCRYPTION_ESTABLISHED);
if (IsCryptoHandshakeConfirmed())
RecordHandshakeState(STATE_HANDSHAKE_CONFIRMED);
else
RecordHandshakeState(STATE_FAILED);
UMA_HISTOGRAM_COUNTS_1M("Net.QuicSession.NumTotalStreams",
num_total_streams_);
UMA_HISTOGRAM_COUNTS_1M("Net.QuicNumSentClientHellos",
crypto_stream_->num_sent_client_hellos());
UMA_HISTOGRAM_COUNTS_1M("Net.QuicSession.Pushed", streams_pushed_count_);
UMA_HISTOGRAM_COUNTS_1M("Net.QuicSession.PushedAndClaimed",
streams_pushed_and_claimed_count_);
UMA_HISTOGRAM_COUNTS_1M("Net.QuicSession.PushedBytes", bytes_pushed_count_);
DCHECK_LE(bytes_pushed_and_unclaimed_count_, bytes_pushed_count_);
UMA_HISTOGRAM_COUNTS_1M("Net.QuicSession.PushedAndUnclaimedBytes",
bytes_pushed_and_unclaimed_count_);
if (!IsCryptoHandshakeConfirmed())
return;
// Sending one client_hello means we had zero handshake-round-trips.
int round_trip_handshakes = crypto_stream_->num_sent_client_hellos() - 1;
// Don't bother with these histogram during tests, which mock out
// num_sent_client_hellos().
if (round_trip_handshakes < 0 || !stream_factory_)
return;
SSLInfo ssl_info;
// QUIC supports only secure urls.
if (GetSSLInfo(&ssl_info) && ssl_info.cert.get()) {
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.QuicSession.ConnectRandomPortForHTTPS",
round_trip_handshakes, 1, 3, 4);
if (require_confirmation_) {
UMA_HISTOGRAM_CUSTOM_COUNTS(
"Net.QuicSession.ConnectRandomPortRequiringConfirmationForHTTPS",
round_trip_handshakes, 1, 3, 4);
}
}
const QuicConnectionStats stats = connection()->GetStats();
// The MTU used by QUIC is limited to a fairly small set of predefined values
// (initial values and MTU discovery values), but does not fare well when
// bucketed. Because of that, a sparse histogram is used here.
UMA_HISTOGRAM_SPARSE_SLOWLY("Net.QuicSession.ClientSideMtu",
connection()->max_packet_length());
UMA_HISTOGRAM_SPARSE_SLOWLY("Net.QuicSession.ServerSideMtu",
stats.max_received_packet_size);
UMA_HISTOGRAM_COUNTS_1M("Net.QuicSession.MtuProbesSent",
connection()->mtu_probe_count());
if (stats.packets_sent >= 100) {
// Used to monitor for regressions that effect large uploads.
UMA_HISTOGRAM_COUNTS_1000(
"Net.QuicSession.PacketRetransmitsPerMille",
1000 * stats.packets_retransmitted / stats.packets_sent);
}
if (stats.max_sequence_reordering == 0)
return;
const base::HistogramBase::Sample kMaxReordering = 100;
base::HistogramBase::Sample reordering = kMaxReordering;
if (stats.min_rtt_us > 0) {
reordering = static_cast<base::HistogramBase::Sample>(
100 * stats.max_time_reordering_us / stats.min_rtt_us);
}
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.QuicSession.MaxReorderingTime", reordering,
1, kMaxReordering, 50);
if (stats.min_rtt_us > 100 * 1000) {
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.QuicSession.MaxReorderingTimeLongRtt",
reordering, 1, kMaxReordering, 50);
}
UMA_HISTOGRAM_COUNTS_1M(
"Net.QuicSession.MaxReordering",
static_cast<base::HistogramBase::Sample>(stats.max_sequence_reordering));
}
void QuicChromiumClientSession::Initialize() {
QuicSpdyClientSessionBase::Initialize();
SetHpackEncoderDebugVisitor(std::make_unique<HpackEncoderDebugVisitor>());
SetHpackDecoderDebugVisitor(std::make_unique<HpackDecoderDebugVisitor>());
set_max_uncompressed_header_bytes(kMaxUncompressedHeaderSize);
}
void QuicChromiumClientSession::OnHeadersHeadOfLineBlocking(
QuicTime::Delta delta) {
UMA_HISTOGRAM_TIMES(
"Net.QuicSession.HeadersHOLBlockedTime",
base::TimeDelta::FromMicroseconds(delta.ToMicroseconds()));
}
void QuicChromiumClientSession::OnStreamFrame(const QuicStreamFrame& frame) {
// Record total number of stream frames.
UMA_HISTOGRAM_COUNTS_1M("Net.QuicNumStreamFramesInPacket", 1);
// Record number of frames per stream in packet.
UMA_HISTOGRAM_COUNTS_1M("Net.QuicNumStreamFramesPerStreamInPacket", 1);
return QuicSpdySession::OnStreamFrame(frame);
}
void QuicChromiumClientSession::AddHandle(Handle* handle) {
if (going_away_) {
RecordUnexpectedObservers(ADD_OBSERVER);
handle->OnSessionClosed(connection()->transport_version(), ERR_UNEXPECTED,
error(), port_migration_detected_,
GetConnectTiming(), WasConnectionEverUsed());
return;
}
DCHECK(!base::ContainsKey(handles_, handle));
handles_.insert(handle);
}
void QuicChromiumClientSession::RemoveHandle(Handle* handle) {
DCHECK(base::ContainsKey(handles_, handle));
handles_.erase(handle);
}
int QuicChromiumClientSession::WaitForHandshakeConfirmation(
const CompletionCallback& callback) {
if (!connection()->connected())
return ERR_CONNECTION_CLOSED;
if (IsCryptoHandshakeConfirmed())
return OK;
waiting_for_confirmation_callbacks_.push_back(callback);
return ERR_IO_PENDING;
}
int QuicChromiumClientSession::TryCreateStream(StreamRequest* request) {
if (stream_factory_ && stream_factory_->IsQuicBroken(this)) {
DVLOG(1) << "QUIC broken.";
return ERR_QUIC_PROTOCOL_ERROR;
}
if (goaway_received()) {
DVLOG(1) << "Going away.";
return ERR_CONNECTION_CLOSED;
}
if (!connection()->connected()) {
DVLOG(1) << "Already closed.";
return ERR_CONNECTION_CLOSED;
}
if (going_away_) {
RecordUnexpectedOpenStreams(TRY_CREATE_STREAM);
return ERR_CONNECTION_CLOSED;
}
if (GetNumOpenOutgoingStreams() < max_open_outgoing_streams()) {
request->stream_ = CreateOutgoingReliableStreamImpl()->CreateHandle();
return OK;
}
request->pending_start_time_ = base::TimeTicks::Now();
stream_requests_.push_back(request);
UMA_HISTOGRAM_COUNTS_1000("Net.QuicSession.NumPendingStreamRequests",
stream_requests_.size());
return ERR_IO_PENDING;
}
void QuicChromiumClientSession::CancelRequest(StreamRequest* request) {
// Remove |request| from the queue while preserving the order of the
// other elements.
StreamRequestQueue::iterator it =
std::find(stream_requests_.begin(), stream_requests_.end(), request);
if (it != stream_requests_.end()) {
it = stream_requests_.erase(it);
}
}
bool QuicChromiumClientSession::ShouldCreateOutgoingDynamicStream() {
if (!crypto_stream_->encryption_established()) {
DVLOG(1) << "Encryption not active so no outgoing stream created.";
return false;
}
if (GetNumOpenOutgoingStreams() >= max_open_outgoing_streams()) {
DVLOG(1) << "Failed to create a new outgoing stream. "
<< "Already " << GetNumOpenOutgoingStreams() << " open.";
return false;
}
if (goaway_received()) {
DVLOG(1) << "Failed to create a new outgoing stream. "
<< "Already received goaway.";
return false;
}
if (going_away_) {
RecordUnexpectedOpenStreams(CREATE_OUTGOING_RELIABLE_STREAM);
return false;
}
return true;
}
bool QuicChromiumClientSession::WasConnectionEverUsed() {
const QuicConnectionStats& stats = connection()->GetStats();
return stats.bytes_sent > 0 || stats.bytes_received > 0;
}
QuicChromiumClientStream*
QuicChromiumClientSession::CreateOutgoingDynamicStream() {
if (!ShouldCreateOutgoingDynamicStream()) {
return nullptr;
}
QuicChromiumClientStream* stream = CreateOutgoingReliableStreamImpl();
return stream;
}
QuicChromiumClientStream*
QuicChromiumClientSession::CreateOutgoingReliableStreamImpl() {
DCHECK(connection()->connected());
QuicChromiumClientStream* stream =
new QuicChromiumClientStream(GetNextOutgoingStreamId(), this, net_log_);
ActivateStream(base::WrapUnique(stream));
++num_total_streams_;
UMA_HISTOGRAM_COUNTS_1M("Net.QuicSession.NumOpenStreams",
GetNumOpenOutgoingStreams());
// The previous histogram puts 100 in a bucket betweeen 86-113 which does
// not shed light on if chrome ever things it has more than 100 streams open.
UMA_HISTOGRAM_BOOLEAN("Net.QuicSession.TooManyOpenStreams",
GetNumOpenOutgoingStreams() > 100);
return stream;
}
QuicCryptoClientStream* QuicChromiumClientSession::GetMutableCryptoStream() {
return crypto_stream_.get();
}
const QuicCryptoClientStream* QuicChromiumClientSession::GetCryptoStream()
const {
return crypto_stream_.get();
}
bool QuicChromiumClientSession::GetRemoteEndpoint(IPEndPoint* endpoint) {
*endpoint = peer_address().impl().socket_address();
return true;
}
// TODO(rtenneti): Add unittests for GetSSLInfo which exercise the various ways
// we learn about SSL info (sync vs async vs cached).
bool QuicChromiumClientSession::GetSSLInfo(SSLInfo* ssl_info) const {
ssl_info->Reset();
if (!cert_verify_result_) {
return false;
}
ssl_info->cert_status = cert_verify_result_->cert_status;
ssl_info->cert = cert_verify_result_->verified_cert;
// Map QUIC AEADs to the corresponding TLS 1.3 cipher. OpenSSL's cipher suite
// numbers begin with a stray 0x03, so mask them off.
QuicTag aead = crypto_stream_->crypto_negotiated_params().aead;
uint16_t cipher_suite;
int security_bits;
switch (aead) {
case kAESG:
cipher_suite = TLS1_CK_AES_128_GCM_SHA256 & 0xffff;
security_bits = 128;
break;
case kCC20:
cipher_suite = TLS1_CK_CHACHA20_POLY1305_SHA256 & 0xffff;
security_bits = 256;
break;
default:
NOTREACHED();
return false;
}
int ssl_connection_status = 0;
SSLConnectionStatusSetCipherSuite(cipher_suite, &ssl_connection_status);
SSLConnectionStatusSetVersion(SSL_CONNECTION_VERSION_QUIC,
&ssl_connection_status);
// Report the QUIC key exchange as the corresponding TLS curve.
switch (crypto_stream_->crypto_negotiated_params().key_exchange) {
case kP256:
ssl_info->key_exchange_group = SSL_CURVE_SECP256R1;
break;
case kC255:
ssl_info->key_exchange_group = SSL_CURVE_X25519;
break;
default:
NOTREACHED();
return false;
}
ssl_info->public_key_hashes = cert_verify_result_->public_key_hashes;
ssl_info->is_issued_by_known_root =
cert_verify_result_->is_issued_by_known_root;
ssl_info->pkp_bypassed = pkp_bypassed_;
ssl_info->connection_status = ssl_connection_status;
ssl_info->client_cert_sent = false;
ssl_info->channel_id_sent = crypto_stream_->WasChannelIDSent();
ssl_info->security_bits = security_bits;
ssl_info->handshake_type = SSLInfo::HANDSHAKE_FULL;
ssl_info->pinning_failure_log = pinning_failure_log_;
ssl_info->UpdateCertificateTransparencyInfo(*ct_verify_result_);
if (crypto_stream_->crypto_negotiated_params().token_binding_key_param ==
kTB10) {
ssl_info->token_binding_negotiated = true;
ssl_info->token_binding_key_param = TB_PARAM_ECDSAP256;
}
return true;
}
Error QuicChromiumClientSession::GetTokenBindingSignature(
crypto::ECPrivateKey* key,
TokenBindingType tb_type,
std::vector<uint8_t>* out) {
// The same key will be used across multiple requests to sign the same value,
// so the signature is cached.
std::string raw_public_key;
if (!key->ExportRawPublicKey(&raw_public_key))
return ERR_FAILED;
TokenBindingSignatureMap::iterator it =
token_binding_signatures_.Get(std::make_pair(tb_type, raw_public_key));
if (it != token_binding_signatures_.end()) {
*out = it->second;
return OK;
}
std::string key_material;
if (!crypto_stream_->ExportTokenBindingKeyingMaterial(&key_material))
return ERR_FAILED;
if (!CreateTokenBindingSignature(key_material, tb_type, key, out))
return ERR_FAILED;
token_binding_signatures_.Put(std::make_pair(tb_type, raw_public_key), *out);
return OK;
}
int QuicChromiumClientSession::CryptoConnect(
const CompletionCallback& callback) {
connect_timing_.connect_start = base::TimeTicks::Now();
RecordHandshakeState(STATE_STARTED);
DCHECK(flow_controller());
if (!crypto_stream_->CryptoConnect())
return ERR_QUIC_HANDSHAKE_FAILED;
if (IsCryptoHandshakeConfirmed()) {
connect_timing_.connect_end = base::TimeTicks::Now();
return OK;
}
// Unless we require handshake confirmation, activate the session if
// we have established initial encryption.
if (!require_confirmation_ && IsEncryptionEstablished())
return OK;
callback_ = callback;
return ERR_IO_PENDING;
}
int QuicChromiumClientSession::GetNumSentClientHellos() const {
return crypto_stream_->num_sent_client_hellos();
}
bool QuicChromiumClientSession::CanPool(const std::string& hostname,
PrivacyMode privacy_mode) const {
DCHECK(connection()->connected());
if (privacy_mode != server_id_.privacy_mode()) {
// Privacy mode must always match.
return false;
}
SSLInfo ssl_info;
if (!GetSSLInfo(&ssl_info) || !ssl_info.cert.get()) {
NOTREACHED() << "QUIC should always have certificates.";
return false;
}
return SpdySession::CanPool(transport_security_state_, ssl_info,
server_id_.host(), hostname);
}
bool QuicChromiumClientSession::ShouldCreateIncomingDynamicStream(
QuicStreamId id) {
if (!connection()->connected()) {
LOG(DFATAL) << "ShouldCreateIncomingDynamicStream called when disconnected";
return false;
}
if (goaway_received()) {
DVLOG(1) << "Cannot create a new outgoing stream. "
<< "Already received goaway.";
return false;
}
if (going_away_) {
return false;
}
if (id % 2 != 0) {
LOG(WARNING) << "Received invalid push stream id " << id;
connection()->CloseConnection(
QUIC_INVALID_STREAM_ID, "Server created odd numbered stream",
ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
return false;
}
return true;
}
QuicChromiumClientStream*
QuicChromiumClientSession::CreateIncomingDynamicStream(QuicStreamId id) {
if (!ShouldCreateIncomingDynamicStream(id)) {
return nullptr;
}
return CreateIncomingReliableStreamImpl(id);
}
QuicChromiumClientStream*
QuicChromiumClientSession::CreateIncomingReliableStreamImpl(QuicStreamId id) {
DCHECK(connection()->connected());
QuicChromiumClientStream* stream =
new QuicChromiumClientStream(id, this, net_log_);
stream->CloseWriteSide();
ActivateStream(base::WrapUnique(stream));
++num_total_streams_;
return stream;
}
void QuicChromiumClientSession::CloseStream(QuicStreamId stream_id) {
QuicStream* stream = GetOrCreateStream(stream_id);
if (stream) {
logger_->UpdateReceivedFrameCounts(stream_id, stream->num_frames_received(),
stream->num_duplicate_frames_received());
if (stream_id % 2 == 0) {
// Stream with even stream is initiated by server for PUSH.
bytes_pushed_count_ += stream->stream_bytes_read();
}
}
QuicSpdySession::CloseStream(stream_id);
OnClosedStream();
}
void QuicChromiumClientSession::SendRstStream(QuicStreamId id,
QuicRstStreamErrorCode error,
QuicStreamOffset bytes_written) {
QuicStream* stream = GetOrCreateStream(id);
if (stream) {
if (id % 2 == 0) {
// Stream with even stream is initiated by server for PUSH.
bytes_pushed_count_ += stream->stream_bytes_read();
}
}
QuicSpdySession::SendRstStream(id, error, bytes_written);
OnClosedStream();
}
void QuicChromiumClientSession::OnClosedStream() {
if (GetNumOpenOutgoingStreams() < max_open_outgoing_streams() &&
!stream_requests_.empty() && crypto_stream_->encryption_established() &&
!goaway_received() && !going_away_ && connection()->connected()) {
StreamRequest* request = stream_requests_.front();
// TODO(ckrasic) - analyze data and then add logic to mark QUIC
// broken if wait times are excessive.
UMA_HISTOGRAM_TIMES("Net.QuicSession.PendingStreamsWaitTime",
base::TimeTicks::Now() - request->pending_start_time_);
stream_requests_.pop_front();
request->OnRequestCompleteSuccess(
CreateOutgoingReliableStreamImpl()->CreateHandle());
}
if (GetNumOpenOutgoingStreams() == 0 && stream_factory_) {
stream_factory_->OnIdleSession(this);
}
}
void QuicChromiumClientSession::OnConfigNegotiated() {
QuicSpdyClientSessionBase::OnConfigNegotiated();
if (!stream_factory_ || !config()->HasReceivedAlternateServerAddress())
return;
// Server has sent an alternate address to connect to.
IPEndPoint new_address =
config()->ReceivedAlternateServerAddress().impl().socket_address();
IPEndPoint old_address;
GetDefaultSocket()->GetPeerAddress(&old_address);
// Migrate only if address families match, or if new address family is v6,
// since a v4 address should be reachable over a v6 network (using a
// v4-mapped v6 address).
if (old_address.GetFamily() != new_address.GetFamily() &&
old_address.GetFamily() == ADDRESS_FAMILY_IPV4) {
return;
}
if (old_address.GetFamily() != new_address.GetFamily()) {
DCHECK_EQ(old_address.GetFamily(), ADDRESS_FAMILY_IPV6);
DCHECK_EQ(new_address.GetFamily(), ADDRESS_FAMILY_IPV4);
// Use a v4-mapped v6 address.
new_address = IPEndPoint(ConvertIPv4ToIPv4MappedIPv6(new_address.address()),
new_address.port());
}
stream_factory_->MigrateSessionToNewPeerAddress(this, new_address, net_log_);
}
void QuicChromiumClientSession::OnCryptoHandshakeEvent(
CryptoHandshakeEvent event) {
if (!callback_.is_null() &&
(!require_confirmation_ || event == HANDSHAKE_CONFIRMED ||
event == ENCRYPTION_REESTABLISHED)) {
// TODO(rtenneti): Currently for all CryptoHandshakeEvent events, callback_
// could be called because there are no error events in CryptoHandshakeEvent
// enum. If error events are added to CryptoHandshakeEvent, then the
// following code needs to changed.
base::ResetAndReturn(&callback_).Run(OK);
}
if (event == HANDSHAKE_CONFIRMED) {
if (stream_factory_)
stream_factory_->set_require_confirmation(false);
// Update |connect_end| only when handshake is confirmed. This should also
// take care of any failed 0-RTT request.
connect_timing_.connect_end = base::TimeTicks::Now();
DCHECK_LE(connect_timing_.connect_start, connect_timing_.connect_end);
UMA_HISTOGRAM_TIMES(
"Net.QuicSession.HandshakeConfirmedTime",
connect_timing_.connect_end - connect_timing_.connect_start);
// Track how long it has taken to finish handshake after we have finished
// DNS host resolution.
if (!connect_timing_.dns_end.is_null()) {
UMA_HISTOGRAM_TIMES(
"Net.QuicSession.HostResolution.HandshakeConfirmedTime",
base::TimeTicks::Now() - connect_timing_.dns_end);
}
HandleSet::iterator it = handles_.begin();
while (it != handles_.end()) {
Handle* handle = *it;
++it;
handle->OnCryptoHandshakeConfirmed();
}
NotifyRequestsOfConfirmation(OK);
}
QuicSpdySession::OnCryptoHandshakeEvent(event);
}
void QuicChromiumClientSession::OnCryptoHandshakeMessageSent(
const CryptoHandshakeMessage& message) {
logger_->OnCryptoHandshakeMessageSent(message);
}
void QuicChromiumClientSession::OnCryptoHandshakeMessageReceived(
const CryptoHandshakeMessage& message) {
logger_->OnCryptoHandshakeMessageReceived(message);
if (message.tag() == kREJ || message.tag() == kSREJ) {
UMA_HISTOGRAM_CUSTOM_COUNTS(
"Net.QuicSession.RejectLength",
message.GetSerialized(Perspective::IS_CLIENT).length(), 1000, 10000,
50);
QuicStringPiece proof;
UMA_HISTOGRAM_BOOLEAN("Net.QuicSession.RejectHasProof",
message.GetStringPiece(kPROF, &proof));
}
}
void QuicChromiumClientSession::OnGoAway(const QuicGoAwayFrame& frame) {
QuicSession::OnGoAway(frame);
NotifyFactoryOfSessionGoingAway();
port_migration_detected_ = frame.error_code == QUIC_ERROR_MIGRATING_PORT;
}
void QuicChromiumClientSession::OnRstStream(const QuicRstStreamFrame& frame) {
QuicSession::OnRstStream(frame);
OnClosedStream();
}
void QuicChromiumClientSession::OnConnectionClosed(
QuicErrorCode error,
const std::string& error_details,
ConnectionCloseSource source) {
DCHECK(!connection()->connected());
logger_->OnConnectionClosed(error, error_details, source);
if (source == ConnectionCloseSource::FROM_PEER) {
if (IsCryptoHandshakeConfirmed()) {
UMA_HISTOGRAM_SPARSE_SLOWLY(
"Net.QuicSession.ConnectionCloseErrorCodeServer.HandshakeConfirmed",
error);
base::HistogramBase* histogram = base::SparseHistogram::FactoryGet(
"Net.QuicSession.StreamCloseErrorCodeServer.HandshakeConfirmed",
base::HistogramBase::kUmaTargetedHistogramFlag);
size_t num_streams = GetNumActiveStreams();
if (num_streams > 0)
histogram->AddCount(error, num_streams);
}
UMA_HISTOGRAM_SPARSE_SLOWLY(
"Net.QuicSession.ConnectionCloseErrorCodeServer", error);
} else {
if (IsCryptoHandshakeConfirmed()) {
UMA_HISTOGRAM_SPARSE_SLOWLY(
"Net.QuicSession.ConnectionCloseErrorCodeClient.HandshakeConfirmed",
error);
base::HistogramBase* histogram = base::SparseHistogram::FactoryGet(
"Net.QuicSession.StreamCloseErrorCodeClient.HandshakeConfirmed",
base::HistogramBase::kUmaTargetedHistogramFlag);
size_t num_streams = GetNumActiveStreams();
if (num_streams > 0)
histogram->AddCount(error, num_streams);
}
UMA_HISTOGRAM_SPARSE_SLOWLY(
"Net.QuicSession.ConnectionCloseErrorCodeClient", error);
}
if (error == QUIC_NETWORK_IDLE_TIMEOUT) {
UMA_HISTOGRAM_COUNTS_1M(
"Net.QuicSession.ConnectionClose.NumOpenStreams.TimedOut",
GetNumOpenOutgoingStreams());
if (IsCryptoHandshakeConfirmed()) {
if (GetNumOpenOutgoingStreams() > 0) {
UMA_HISTOGRAM_BOOLEAN(
"Net.QuicSession.TimedOutWithOpenStreams.HasUnackedPackets",
connection()->sent_packet_manager().HasUnackedPackets());
UMA_HISTOGRAM_COUNTS_1M(
"Net.QuicSession.TimedOutWithOpenStreams.ConsecutiveRTOCount",
connection()->sent_packet_manager().GetConsecutiveRtoCount());
UMA_HISTOGRAM_COUNTS_1M(
"Net.QuicSession.TimedOutWithOpenStreams.ConsecutiveTLPCount",
connection()->sent_packet_manager().GetConsecutiveTlpCount());
UMA_HISTOGRAM_SPARSE_SLOWLY(
"Net.QuicSession.TimedOutWithOpenStreams.LocalPort",
connection()->self_address().port());
}
} else {
UMA_HISTOGRAM_COUNTS_1M(
"Net.QuicSession.ConnectionClose.NumOpenStreams.HandshakeTimedOut",
GetNumOpenOutgoingStreams());
UMA_HISTOGRAM_COUNTS_1M(
"Net.QuicSession.ConnectionClose.NumTotalStreams.HandshakeTimedOut",
num_total_streams_);
}
}
if (IsCryptoHandshakeConfirmed()) {
// QUIC connections should not timeout while there are open streams,
// since PING frames are sent to prevent timeouts. If, however, the
// connection timed out with open streams then QUIC traffic has become
// blackholed. Alternatively, if too many retransmission timeouts occur
// then QUIC traffic has become blackholed.
if (stream_factory_ &&
(error == QUIC_TOO_MANY_RTOS || (error == QUIC_NETWORK_IDLE_TIMEOUT &&
GetNumOpenOutgoingStreams() > 0))) {
stream_factory_->OnBlackholeAfterHandshakeConfirmed(this);
}
} else {
if (error == QUIC_PUBLIC_RESET) {
RecordHandshakeFailureReason(HANDSHAKE_FAILURE_PUBLIC_RESET);
} else if (connection()->GetStats().packets_received == 0) {
RecordHandshakeFailureReason(HANDSHAKE_FAILURE_BLACK_HOLE);
UMA_HISTOGRAM_SPARSE_SLOWLY(
"Net.QuicSession.ConnectionClose.HandshakeFailureBlackHole.QuicError",
error);
} else {
RecordHandshakeFailureReason(HANDSHAKE_FAILURE_UNKNOWN);
UMA_HISTOGRAM_SPARSE_SLOWLY(
"Net.QuicSession.ConnectionClose.HandshakeFailureUnknown.QuicError",
error);
}
}
UMA_HISTOGRAM_SPARSE_SLOWLY("Net.QuicSession.QuicVersion",
connection()->transport_version());
NotifyFactoryOfSessionGoingAway();
QuicSession::OnConnectionClosed(error, error_details, source);
if (!callback_.is_null()) {
base::ResetAndReturn(&callback_).Run(ERR_QUIC_PROTOCOL_ERROR);
}
for (auto& socket : sockets_) {
socket->Close();
}
DCHECK(dynamic_streams().empty());
CloseAllStreams(ERR_UNEXPECTED);
CloseAllHandles(ERR_UNEXPECTED);
CancelAllRequests(ERR_CONNECTION_CLOSED);
NotifyRequestsOfConfirmation(ERR_CONNECTION_CLOSED);
NotifyFactoryOfSessionClosedLater();
}
void QuicChromiumClientSession::OnSuccessfulVersionNegotiation(
const QuicTransportVersion& version) {
logger_->OnSuccessfulVersionNegotiation(version);
QuicSpdySession::OnSuccessfulVersionNegotiation(version);
}
int QuicChromiumClientSession::HandleWriteError(
int error_code,
scoped_refptr<QuicChromiumPacketWriter::ReusableIOBuffer> packet) {
if (stream_factory_ == nullptr ||
!stream_factory_->migrate_sessions_on_network_change()) {
return error_code;
}
DCHECK(packet != nullptr);
DCHECK_NE(ERR_IO_PENDING, error_code);
DCHECK_GT(0, error_code);
DCHECK(!migration_pending_);
DCHECK(packet_ == nullptr);
// Post a task to migrate the session onto a new network.
task_runner_->PostTask(
FROM_HERE,
base::Bind(&QuicChromiumClientSession::MigrateSessionOnWriteError,
weak_factory_.GetWeakPtr(), error_code));
// Store packet in the session since the actual migration and packet rewrite
// can happen via this posted task or via an async network notification.
packet_ = std::move(packet);
migration_pending_ = true;
// Cause the packet writer to return ERR_IO_PENDING and block so
// that the actual migration happens from the message loop instead
// of under the call stack of QuicConnection::WritePacket.
return ERR_IO_PENDING;
}
void QuicChromiumClientSession::MigrateSessionOnWriteError(int error_code) {
// If migration_pending_ is false, an earlier task completed migration.
if (!migration_pending_)
return;
MigrationResult result = MigrationResult::FAILURE;
if (stream_factory_ != nullptr)
result = stream_factory_->MaybeMigrateSingleSessionOnWriteError(this,
error_code);
if (result == MigrationResult::SUCCESS)
return;
if (result == MigrationResult::NO_NEW_NETWORK) {
OnNoNewNetwork();
return;
}
// Close the connection if migration failed. Do not cause a
// connection close packet to be sent since socket may be borked.
connection()->CloseConnection(QUIC_PACKET_WRITE_ERROR,
"Write and subsequent migration failed",
ConnectionCloseBehavior::SILENT_CLOSE);
}
void QuicChromiumClientSession::OnNoNewNetwork() {
migration_pending_ = true;
// Block the packet writer to avoid any writes while migration is in progress.
static_cast<QuicChromiumPacketWriter*>(connection()->writer())
->set_write_blocked(true);
// Post a task to maybe close the session if the alarm fires.
task_runner_->PostDelayedTask(
FROM_HERE, base::Bind(&QuicChromiumClientSession::OnMigrationTimeout,
weak_factory_.GetWeakPtr(), sockets_.size()),
base::TimeDelta::FromSeconds(kWaitTimeForNewNetworkSecs));
}
void QuicChromiumClientSession::WriteToNewSocket() {
// Prevent any pending migration from executing.
migration_pending_ = false;
static_cast<QuicChromiumPacketWriter*>(connection()->writer())
->set_write_blocked(false);
if (packet_ == nullptr) {
// Unblock the connection before sending a PING packet, since it
// may have been blocked before the migration started.
connection()->OnCanWrite();
connection()->SendPing();
return;
}
// The connection is waiting for the original write to complete
// asynchronously. The new writer will notify the connection if the
// write below completes asynchronously, but a synchronous competion
// must be propagated back to the connection here.
WriteResult result =
static_cast<QuicChromiumPacketWriter*>(connection()->writer())
->WritePacketToSocket(std::move(packet_));
if (result.error_code == ERR_IO_PENDING)
return;
// All write errors should be mapped into ERR_IO_PENDING by
// HandleWriteError.
DCHECK_LT(0, result.error_code);
connection()->OnCanWrite();
}
void QuicChromiumClientSession::OnMigrationTimeout(size_t num_sockets) {
// If number of sockets has changed, this migration task is stale.
if (num_sockets != sockets_.size())
return;
UMA_HISTOGRAM_ENUMERATION("Net.QuicSession.ConnectionMigration",
MIGRATION_STATUS_NO_ALTERNATE_NETWORK,
MIGRATION_STATUS_MAX);
CloseSessionOnError(ERR_NETWORK_CHANGED,
QUIC_CONNECTION_MIGRATION_NO_NEW_NETWORK);
}
void QuicChromiumClientSession::OnNetworkConnected(
NetworkChangeNotifier::NetworkHandle network,
const NetLogWithSource& net_log) {
// If migration_pending_ is false, there was no migration pending or
// an earlier task completed migration.
if (!migration_pending_)
return;
// TODO(jri): Ensure that OnSessionGoingAway is called consistently,
// and that it's always called at the same time in the whole
// migration process. Allows tests to be more uniform.
stream_factory_->OnSessionGoingAway(this);
stream_factory_->MigrateSessionToNewNetwork(
this, network, /*close_session_on_error=*/true, net_log);
}
void QuicChromiumClientSession::OnWriteError(int error_code) {
DCHECK_NE(ERR_IO_PENDING, error_code);
DCHECK_GT(0, error_code);
if (IsCryptoHandshakeConfirmed()) {
UMA_HISTOGRAM_SPARSE_SLOWLY("Net.QuicSession.WriteError.HandshakeConfirmed",
-error_code);
}
connection()->OnWriteError(error_code);
}
void QuicChromiumClientSession::OnWriteUnblocked() {
connection()->OnCanWrite();
}
void QuicChromiumClientSession::OnPathDegrading() {
if (stream_factory_) {
stream_factory_->MaybeMigrateSingleSessionOnPathDegrading(this);
}
}
bool QuicChromiumClientSession::HasOpenDynamicStreams() const {
return QuicSession::HasOpenDynamicStreams() ||
GetNumDrainingOutgoingStreams() > 0;
}
void QuicChromiumClientSession::OnProofValid(
const QuicCryptoClientConfig::CachedState& cached) {
DCHECK(cached.proof_valid());
if (!server_info_) {
return;
}
QuicServerInfo::State* state = server_info_->mutable_state();
state->server_config = cached.server_config();
state->source_address_token = cached.source_address_token();
state->cert_sct = cached.cert_sct();
state->chlo_hash = cached.chlo_hash();
state->server_config_sig = cached.signature();
state->certs = cached.certs();
server_info_->Persist();
}
void QuicChromiumClientSession::OnProofVerifyDetailsAvailable(
const ProofVerifyDetails& verify_details) {
const ProofVerifyDetailsChromium* verify_details_chromium =
reinterpret_cast<const ProofVerifyDetailsChromium*>(&verify_details);
cert_verify_result_.reset(
new CertVerifyResult(verify_details_chromium->cert_verify_result));
pinning_failure_log_ = verify_details_chromium->pinning_failure_log;
std::unique_ptr<ct::CTVerifyResult> ct_verify_result_copy(
new ct::CTVerifyResult(verify_details_chromium->ct_verify_result));
ct_verify_result_ = std::move(ct_verify_result_copy);
logger_->OnCertificateVerified(*cert_verify_result_);
pkp_bypassed_ = verify_details_chromium->pkp_bypassed;
}
void QuicChromiumClientSession::StartReading() {
for (auto& packet_reader : packet_readers_) {
packet_reader->StartReading();
}
}
void QuicChromiumClientSession::CloseSessionOnError(int net_error,
QuicErrorCode quic_error) {
UMA_HISTOGRAM_SPARSE_SLOWLY("Net.QuicSession.CloseSessionOnError",
-net_error);
if (!callback_.is_null()) {
base::ResetAndReturn(&callback_).Run(net_error);
}
CloseAllStreams(net_error);
CloseAllHandles(net_error);
net_log_.AddEvent(NetLogEventType::QUIC_SESSION_CLOSE_ON_ERROR,
NetLog::IntCallback("net_error", net_error));
if (connection()->connected())
connection()->CloseConnection(quic_error, "net error",
ConnectionCloseBehavior::SILENT_CLOSE);
DCHECK(!connection()->connected());
NotifyFactoryOfSessionClosed();
}
void QuicChromiumClientSession::CloseAllStreams(int net_error) {
while (!dynamic_streams().empty()) {
QuicStream* stream = dynamic_streams().begin()->second.get();
QuicStreamId id = stream->id();
static_cast<QuicChromiumClientStream*>(stream)->OnError(net_error);
CloseStream(id);
}
}
void QuicChromiumClientSession::CloseAllHandles(int net_error) {
while (!handles_.empty()) {
Handle* handle = *handles_.begin();
handles_.erase(handle);
handle->OnSessionClosed(connection()->transport_version(), net_error,
error(), port_migration_detected_,
GetConnectTiming(), WasConnectionEverUsed());
}
}
void QuicChromiumClientSession::CancelAllRequests(int net_error) {
UMA_HISTOGRAM_COUNTS_1000("Net.QuicSession.AbortedPendingStreamRequests",
stream_requests_.size());
while (!stream_requests_.empty()) {
StreamRequest* request = stream_requests_.front();
stream_requests_.pop_front();
request->OnRequestCompleteFailure(net_error);
}
}
void QuicChromiumClientSession::NotifyRequestsOfConfirmation(int net_error) {
// Post tasks to avoid reentrancy.
for (auto callback : waiting_for_confirmation_callbacks_)
task_runner_->PostTask(FROM_HERE, base::Bind(callback, net_error));
waiting_for_confirmation_callbacks_.clear();
}
std::unique_ptr<base::Value> QuicChromiumClientSession::GetInfoAsValue(
const std::set<HostPortPair>& aliases) {
std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
dict->SetString("version",
QuicVersionToString(connection()->transport_version()));
dict->SetInteger("open_streams", GetNumOpenOutgoingStreams());
std::unique_ptr<base::ListValue> stream_list(new base::ListValue());
for (DynamicStreamMap::const_iterator it = dynamic_streams().begin();
it != dynamic_streams().end(); ++it) {
stream_list->AppendString(base::UintToString(it->second->id()));
}
dict->Set("active_streams", std::move(stream_list));
dict->SetInteger("total_streams", num_total_streams_);
dict->SetString("peer_address", peer_address().ToString());
dict->SetString("connection_id", base::Uint64ToString(connection_id()));
dict->SetBoolean("connected", connection()->connected());
const QuicConnectionStats& stats = connection()->GetStats();
dict->SetInteger("packets_sent", stats.packets_sent);
dict->SetInteger("packets_received", stats.packets_received);
dict->SetInteger("packets_lost", stats.packets_lost);
SSLInfo ssl_info;
std::unique_ptr<base::ListValue> alias_list(new base::ListValue());
for (std::set<HostPortPair>::const_iterator it = aliases.begin();
it != aliases.end(); it++) {
alias_list->AppendString(it->ToString());
}
dict->Set("aliases", std::move(alias_list));
return std::move(dict);
}
std::unique_ptr<QuicChromiumClientSession::Handle>
QuicChromiumClientSession::CreateHandle() {
return std::make_unique<QuicChromiumClientSession::Handle>(
weak_factory_.GetWeakPtr());
}
void QuicChromiumClientSession::OnReadError(
int result,
const DatagramClientSocket* socket) {
DCHECK(socket != nullptr);
if (socket != GetDefaultSocket()) {
// Ignore read errors from old sockets that are no longer active.
// TODO(jri): Maybe clean up old sockets on error.
return;
}
DVLOG(1) << "Closing session on read error: " << result;
UMA_HISTOGRAM_SPARSE_SLOWLY("Net.QuicSession.ReadError", -result);
connection()->CloseConnection(QUIC_PACKET_READ_ERROR, ErrorToString(result),
ConnectionCloseBehavior::SILENT_CLOSE);
}
bool QuicChromiumClientSession::OnPacket(
const QuicReceivedPacket& packet,
const QuicSocketAddress& local_address,
const QuicSocketAddress& peer_address) {
ProcessUdpPacket(local_address, peer_address, packet);
if (!connection()->connected()) {
NotifyFactoryOfSessionClosedLater();
return false;
}
return true;
}
void QuicChromiumClientSession::NotifyFactoryOfSessionGoingAway() {
going_away_ = true;
if (stream_factory_)
stream_factory_->OnSessionGoingAway(this);
}
void QuicChromiumClientSession::NotifyFactoryOfSessionClosedLater() {
if (!dynamic_streams().empty())
RecordUnexpectedOpenStreams(NOTIFY_FACTORY_OF_SESSION_CLOSED_LATER);
if (!going_away_)
RecordUnexpectedNotGoingAway(NOTIFY_FACTORY_OF_SESSION_CLOSED_LATER);
going_away_ = true;
DCHECK_EQ(0u, GetNumActiveStreams());
DCHECK(!connection()->connected());
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE,
base::Bind(&QuicChromiumClientSession::NotifyFactoryOfSessionClosed,
weak_factory_.GetWeakPtr()));
}
void QuicChromiumClientSession::NotifyFactoryOfSessionClosed() {
if (!dynamic_streams().empty())
RecordUnexpectedOpenStreams(NOTIFY_FACTORY_OF_SESSION_CLOSED);
if (!going_away_)
RecordUnexpectedNotGoingAway(NOTIFY_FACTORY_OF_SESSION_CLOSED);
going_away_ = true;
DCHECK_EQ(0u, GetNumActiveStreams());
// Will delete |this|.
if (stream_factory_)
stream_factory_->OnSessionClosed(this);
}
bool QuicChromiumClientSession::MigrateToSocket(
std::unique_ptr<DatagramClientSocket> socket,
std::unique_ptr<QuicChromiumPacketReader> reader,
std::unique_ptr<QuicChromiumPacketWriter> writer) {
DCHECK_EQ(sockets_.size(), packet_readers_.size());
if (sockets_.size() >= kMaxReadersPerQuicSession)
return false;
// TODO(jri): Make SetQuicPacketWriter take a scoped_ptr.
packet_readers_.push_back(std::move(reader));
sockets_.push_back(std::move(socket));
StartReading();
// Block the writer to prevent is being used until WriteToNewSocket
// completes.
writer->set_write_blocked(true);
connection()->SetQuicPacketWriter(writer.release(), /*owns_writer=*/true);
// Post task to write the pending packet or a PING packet to the new
// socket. This avoids reentrancy issues if there is a write error
// on the write to the new socket.
task_runner_->PostTask(
FROM_HERE, base::Bind(&QuicChromiumClientSession::WriteToNewSocket,
weak_factory_.GetWeakPtr()));
// Migration completed.
migration_pending_ = false;
return true;
}
void QuicChromiumClientSession::PopulateNetErrorDetails(
NetErrorDetails* details) const {
details->quic_port_migration_detected = port_migration_detected_;
details->quic_connection_error = error();
}
const DatagramClientSocket* QuicChromiumClientSession::GetDefaultSocket()
const {
DCHECK(sockets_.back().get() != nullptr);
// The most recently added socket is the currently active one.
return sockets_.back().get();
}
bool QuicChromiumClientSession::IsAuthorized(const std::string& hostname) {
bool result = CanPool(hostname, server_id_.privacy_mode());
if (result)
streams_pushed_count_++;
return result;
}
bool QuicChromiumClientSession::HasNonMigratableStreams() const {
for (const auto& stream : dynamic_streams()) {
if (!static_cast<QuicChromiumClientStream*>(stream.second.get())
->can_migrate()) {
return true;
}
}
return false;
}
bool QuicChromiumClientSession::HandlePromised(QuicStreamId id,
QuicStreamId promised_id,
const SpdyHeaderBlock& headers) {
bool result =
QuicSpdyClientSessionBase::HandlePromised(id, promised_id, headers);
if (result) {
// The push promise is accepted, notify the push_delegate that a push
// promise has been received.
GURL pushed_url = GetUrlFromHeaderBlock(headers);
if (push_delegate_) {
push_delegate_->OnPush(std::make_unique<QuicServerPushHelper>(
weak_factory_.GetWeakPtr(), pushed_url),
net_log_);
}
}
net_log_.AddEvent(NetLogEventType::QUIC_SESSION_PUSH_PROMISE_RECEIVED,
base::Bind(&NetLogQuicPushPromiseReceivedCallback, &headers,
id, promised_id));
return result;
}
void QuicChromiumClientSession::DeletePromised(
QuicClientPromisedInfo* promised) {
if (IsOpenStream(promised->id()))
streams_pushed_and_claimed_count_++;
QuicSpdyClientSessionBase::DeletePromised(promised);
}
void QuicChromiumClientSession::OnPushStreamTimedOut(QuicStreamId stream_id) {
QuicSpdyStream* stream = GetPromisedStream(stream_id);
if (stream != nullptr)
bytes_pushed_and_unclaimed_count_ += stream->stream_bytes_read();
}
void QuicChromiumClientSession::CancelPush(const GURL& url) {
QuicClientPromisedInfo* promised_info =
QuicSpdyClientSessionBase::GetPromisedByUrl(url.spec());
if (!promised_info || promised_info->is_validating()) {
// Push stream has already been claimed or is pending matched to a request.
return;
}
QuicStreamId stream_id = promised_info->id();
// Collect data on the cancelled push stream.
QuicSpdyStream* stream = GetPromisedStream(stream_id);
if (stream != nullptr)
bytes_pushed_and_unclaimed_count_ += stream->stream_bytes_read();
// Send the reset and remove the promised info from the promise index.
QuicSpdyClientSessionBase::ResetPromised(stream_id, QUIC_STREAM_CANCELLED);
DeletePromised(promised_info);
}
const LoadTimingInfo::ConnectTiming&
QuicChromiumClientSession::GetConnectTiming() {
connect_timing_.ssl_start = connect_timing_.connect_start;
connect_timing_.ssl_end = connect_timing_.connect_end;
return connect_timing_;
}
QuicTransportVersion QuicChromiumClientSession::GetQuicVersion() const {
return connection()->transport_version();
}
size_t QuicChromiumClientSession::EstimateMemoryUsage() const {
// TODO(xunjieli): Estimate |crypto_stream_|, QuicSpdySession's
// QuicHeaderList, QuicSession's QuiCWriteBlockedList, open streams and
// unacked packet map.
return base::trace_event::EstimateMemoryUsage(packet_readers_);
}
} // namespace net
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