blob: 6eee78fc6dbc3f0243cf37ef72c1d3d372958330 [file] [log] [blame]
// 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.
// A client specific quic::QuicSession subclass. This class owns the underlying
// quic::QuicConnection and QuicConnectionHelper objects. The connection stores
// a non-owning pointer to the helper so this session needs to ensure that
// the helper outlives the connection.
#include <stddef.h>
#include <list>
#include <memory>
#include <set>
#include <string>
#include <vector>
#include "base/containers/mru_cache.h"
#include "base/macros.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "net/base/completion_once_callback.h"
#include "net/base/load_timing_info.h"
#include "net/base/net_error_details.h"
#include "net/base/net_export.h"
#include "net/base/proxy_server.h"
#include "net/cert/ct_verify_result.h"
#include "net/log/net_log_with_source.h"
#include "net/quic/quic_chromium_client_stream.h"
#include "net/quic/quic_chromium_packet_reader.h"
#include "net/quic/quic_chromium_packet_writer.h"
#include "net/quic/quic_connection_logger.h"
#include "net/quic/quic_connectivity_probing_manager.h"
#include "net/quic/quic_session_key.h"
#include "net/socket/socket_performance_watcher.h"
#include "net/spdy/http2_priority_dependencies.h"
#include "net/spdy/multiplexed_session.h"
#include "net/spdy/server_push_delegate.h"
#include "net/third_party/quiche/src/quic/core/http/quic_client_push_promise_index.h"
#include "net/third_party/quiche/src/quic/core/http/quic_spdy_client_session_base.h"
#include "net/third_party/quiche/src/quic/core/quic_crypto_client_stream.h"
#include "net/third_party/quiche/src/quic/core/quic_packets.h"
#include "net/third_party/quiche/src/quic/core/quic_server_id.h"
#include "net/third_party/quiche/src/quic/core/quic_time.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
namespace net {
class CertVerifyResult;
class DatagramClientSocket;
class NetLog;
class NetworkIsolationKey;
class QuicCryptoClientStreamFactory;
class QuicServerInfo;
class QuicStreamFactory;
class SSLConfigService;
class SSLInfo;
class TransportSecurityState;
namespace test {
class QuicChromiumClientSessionPeer;
} // namespace test
// SETTINGS_MAX_HEADERS_LIST_SIZE, the maximum size of uncompressed QUIC headers
// that the server is allowed to send.
const size_t kQuicMaxHeaderListSize = 256 * 1024;
// Result of a session migration attempt.
enum class MigrationResult {
SUCCESS, // Migration succeeded.
NO_NEW_NETWORK, // Migration failed since no new network was found.
FAILURE // Migration failed for other reasons.
// Mode of connection migration.
enum class ConnectionMigrationMode {
// Cause of connection migration.
enum ConnectionMigrationCause {
ON_WRITE_ERROR, // No probing.
ON_PATH_DEGRADING, // With probing.
// Result of connection migration.
enum QuicConnectionMigrationStatus {
// Result of a connectivity probing attempt.
enum class ProbingResult {
PENDING, // Probing started, pending result.
DISABLED_WITH_IDLE_SESSION, // Probing disabled with idle session.
DISABLED_BY_CONFIG, // Probing disabled by config.
DISABLED_BY_NON_MIGRABLE_STREAM, // Probing disabled by special stream.
INTERNAL_ERROR, // Probing failed for internal reason.
FAILURE, // Probing failed for other reason.
class NET_EXPORT_PRIVATE QuicChromiumClientSession
: public quic::QuicSpdyClientSessionBase,
public MultiplexedSession,
public QuicConnectivityProbingManager::Delegate,
public QuicChromiumPacketReader::Visitor,
public QuicChromiumPacketWriter::Delegate {
class StreamRequest;
// Wrapper for interacting with the session in a restricted fashion which
// hides the details of the underlying session's lifetime. All methods of
// the Handle are safe to use even after the underlying session is destroyed.
: public MultiplexedSessionHandle,
public quic::QuicClientPushPromiseIndex::Delegate {
// Constructs a handle to |session| which was created via the alternative
// server |destination|.
Handle(const base::WeakPtr<QuicChromiumClientSession>& session,
const HostPortPair& destination);
Handle(const Handle& other) = delete;
~Handle() override;
// Returns true if the session is still connected.
bool IsConnected() const;
// Returns true if the handshake has been confirmed.
bool IsCryptoHandshakeConfirmed() const;
// Starts a request to rendezvous with a promised a stream. If OK is
// returned, then |push_stream_| will be updated with the promised
// stream. If ERR_IO_PENDING is returned, then when the rendezvous is
// eventually completed |callback| will be called.
int RendezvousWithPromised(const spdy::SpdyHeaderBlock& headers,
CompletionOnceCallback callback);
// Starts a request to create a stream. If OK is returned, then
// |stream_| will be updated with the newly created stream. If
// ERR_IO_PENDING is returned, then when the request is eventuallly
// complete |callback| will be called.
int RequestStream(bool requires_confirmation,
CompletionOnceCallback callback,
const NetworkTrafficAnnotationTag& traffic_annotation);
// Releases |stream_| to the caller. Returns nullptr if the underlying
// QuicChromiumClientSession is closed.
std::unique_ptr<QuicChromiumClientStream::Handle> ReleaseStream();
// Releases |push_stream_| to the caller.
std::unique_ptr<QuicChromiumClientStream::Handle> ReleasePromisedStream();
// Sends Rst for the stream, and makes sure that future calls to
// IsClosedStream(id) return true, which ensures that any subsequent
// frames related to this stream will be ignored (modulo flow
// control accounting).
void ResetPromised(quic::QuicStreamId id,
quic::QuicRstStreamErrorCode error_code);
// Returns a new packet bundler while will cause writes to be batched up
// until a packet is full, or the last bundler is destroyed.
// Populates network error details for this session.
void PopulateNetErrorDetails(NetErrorDetails* details) const;
// Returns the connection timing for the handshake of this session.
const LoadTimingInfo::ConnectTiming& GetConnectTiming();
// Returns true if |other| is a handle to the same session as this handle.
bool SharesSameSession(const Handle& other) const;
// Returns the QUIC version used by the session.
quic::QuicTransportVersion GetQuicVersion() const;
// Copies the remote udp address into |address| and returns a net error
// code.
int GetPeerAddress(IPEndPoint* address) const;
// Copies the local udp address into |address| and returns a net error
// code.
int GetSelfAddress(IPEndPoint* address) const;
// Returns the push promise index associated with the session.
quic::QuicClientPushPromiseIndex* GetPushPromiseIndex();
// Returns the session's server ID.
quic::QuicServerId server_id() const { return server_id_; }
// Returns the alternative server used for this session.
HostPortPair destination() const { return destination_; }
// Returns the session's net log.
const NetLogWithSource& net_log() const { return net_log_; }
// Returns the session's connection migration mode.
ConnectionMigrationMode connection_migration_mode() const {
return session_->connection_migration_mode();
// quic::QuicClientPushPromiseIndex::Delegate implementation
bool CheckVary(const spdy::SpdyHeaderBlock& client_request,
const spdy::SpdyHeaderBlock& promise_request,
const spdy::SpdyHeaderBlock& promise_response) override;
void OnRendezvousResult(quic::QuicSpdyStream* stream) override;
// Returns true if the session's connection has sent or received any bytes.
bool WasEverUsed() const;
friend class QuicChromiumClientSession;
friend class QuicChromiumClientSession::StreamRequest;
// Waits for the handshake to be confirmed and invokes |callback| when
// that happens. If the handshake has already been confirmed, returns OK.
// If the connection has already been closed, returns a net error. If the
// connection closes before the handshake is confirmed, |callback| will
// be invoked with an error.
int WaitForHandshakeConfirmation(CompletionOnceCallback callback);
// Called when the handshake is confirmed.
void OnCryptoHandshakeConfirmed();
// Called when the session is closed with a net error.
void OnSessionClosed(quic::QuicTransportVersion quic_version,
int net_error,
quic::QuicErrorCode quic_error,
bool port_migration_detected,
LoadTimingInfo::ConnectTiming connect_timing,
bool was_ever_used);
// Called by |request| to create a stream.
int TryCreateStream(StreamRequest* request);
// Called by |request| to cancel stream request.
void CancelRequest(StreamRequest* request);
// Underlying session which may be destroyed before this handle.
base::WeakPtr<QuicChromiumClientSession> session_;
HostPortPair destination_;
// Stream request created by |RequestStream()|.
std::unique_ptr<StreamRequest> stream_request_;
// Information saved from the session which can be used even after the
// session is destroyed.
NetLogWithSource net_log_;
bool was_handshake_confirmed_;
int net_error_;
quic::QuicErrorCode quic_error_;
bool port_migration_detected_;
quic::QuicServerId server_id_;
quic::QuicTransportVersion quic_version_;
LoadTimingInfo::ConnectTiming connect_timing_;
quic::QuicClientPushPromiseIndex* push_promise_index_;
// |quic::QuicClientPromisedInfo| owns this. It will be set when |Try()|
// is asynchronous, i.e. it returned quic::QUIC_PENDING, and remains valid
// until |OnRendezvouResult()| fires or |push_handle_->Cancel()| is
// invoked.
quic::QuicClientPushPromiseIndex::TryHandle* push_handle_;
CompletionOnceCallback push_callback_;
std::unique_ptr<QuicChromiumClientStream::Handle> push_stream_;
bool was_ever_used_;
// A helper class used to manage a request to create a stream.
class NET_EXPORT_PRIVATE StreamRequest {
// Cancels any pending stream creation request and resets |stream_| if
// it has not yet been released.
// Starts a request to create a stream. If OK is returned, then
// |stream_| will be updated with the newly created stream. If
// ERR_IO_PENDING is returned, then when the request is eventuallly
// complete |callback| will be called.
int StartRequest(CompletionOnceCallback callback);
// Releases |stream_| to the caller.
std::unique_ptr<QuicChromiumClientStream::Handle> ReleaseStream();
const NetworkTrafficAnnotationTag traffic_annotation() {
return traffic_annotation_;
friend class QuicChromiumClientSession;
enum State {
// |session| must outlive this request.
StreamRequest(QuicChromiumClientSession::Handle* session,
bool requires_confirmation,
const NetworkTrafficAnnotationTag& traffic_annotation);
void OnIOComplete(int rv);
void DoCallback(int rv);
int DoLoop(int rv);
int DoWaitForConfirmation();
int DoWaitForConfirmationComplete(int rv);
int DoRequestStream();
int DoRequestStreamComplete(int rv);
// Called by |session_| for an asynchronous request when the stream
// request has finished successfully.
void OnRequestCompleteSuccess(
std::unique_ptr<QuicChromiumClientStream::Handle> stream);
// Called by |session_| for an asynchronous request when the stream
// request has finished with an error. Also called with ERR_ABORTED
// if |session_| is destroyed while the stream request is still pending.
void OnRequestCompleteFailure(int rv);
QuicChromiumClientSession::Handle* session_;
const bool requires_confirmation_;
CompletionOnceCallback callback_;
std::unique_ptr<QuicChromiumClientStream::Handle> stream_;
// For tracking how much time pending stream requests wait.
base::TimeTicks pending_start_time_;
State next_state_;
const NetworkTrafficAnnotationTag traffic_annotation_;
base::WeakPtrFactory<StreamRequest> weak_factory_{this};
// Constructs a new session which will own |connection|, but not
// |stream_factory|, which must outlive this session.
// TODO(rch): decouple the factory from the session via a Delegate interface.
quic::QuicConnection* connection,
std::unique_ptr<DatagramClientSocket> socket,
QuicStreamFactory* stream_factory,
QuicCryptoClientStreamFactory* crypto_client_stream_factory,
quic::QuicClock* clock,
TransportSecurityState* transport_security_state,
SSLConfigService* ssl_config_service,
std::unique_ptr<QuicServerInfo> server_info,
const QuicSessionKey& session_key,
bool require_confirmation,
quic::QuicStreamId max_allowed_push_id,
bool migrate_sesion_early_v2,
bool migrate_session_on_network_change_v2,
NetworkChangeNotifier::NetworkHandle default_network,
quic::QuicTime::Delta retransmittable_on_wire_timeout,
bool migrate_idle_session,
base::TimeDelta idle_migration_period,
base::TimeDelta max_time_on_non_default_network,
int max_migrations_to_non_default_network_on_write_error,
int max_migrations_to_non_default_network_on_path_degrading,
int yield_after_packets,
quic::QuicTime::Delta yield_after_duration,
bool go_away_on_path_degrading,
bool headers_include_h2_stream_dependency,
int cert_verify_flags,
const quic::QuicConfig& config,
quic::QuicCryptoClientConfig* crypto_config,
const char* const connection_description,
base::TimeTicks dns_resolution_start_time,
base::TimeTicks dns_resolution_end_time,
quic::QuicClientPushPromiseIndex* push_promise_index,
ServerPushDelegate* push_delegate,
const base::TickClock* tick_clock,
base::SequencedTaskRunner* task_runner,
std::unique_ptr<SocketPerformanceWatcher> socket_performance_watcher,
NetLog* net_log);
~QuicChromiumClientSession() override;
void Initialize() override;
void AddHandle(Handle* handle);
void RemoveHandle(Handle* handle);
// Returns the session's connection migration mode.
ConnectionMigrationMode connection_migration_mode() const;
// Waits for the handshake to be confirmed and invokes |callback| when
// that happens. If the handshake has already been confirmed, returns OK.
// If the connection has already been closed, returns a net error. If the
// connection closes before the handshake is confirmed, |callback| will
// be invoked with an error.
int WaitForHandshakeConfirmation(CompletionOnceCallback callback);
// Attempts to create a new stream. If the stream can be
// created immediately, returns OK. If the open stream limit
// has been reached, returns ERR_IO_PENDING, and |request|
// will be added to the stream requets queue and will
// be completed asynchronously.
// TODO(rch): remove |stream| from this and use setter on |request|
// and fix in spdy too.
int TryCreateStream(StreamRequest* request);
// Cancels the pending stream creation request.
void CancelRequest(StreamRequest* request);
// QuicChromiumPacketWriter::Delegate override.
int HandleWriteError(int error_code,
last_packet) override;
void OnWriteError(int error_code) override;
// Called when the associated writer is unblocked. Write the cached |packet_|
// if |packet_| is set. May send a PING packet if
// |send_packet_after_migration_| is set and writer is not blocked after
// writing queued packets.
void OnWriteUnblocked() override;
// QuicConnectivityProbingManager::Delegate override.
void OnProbeSucceeded(
NetworkChangeNotifier::NetworkHandle network,
const quic::QuicSocketAddress& peer_address,
const quic::QuicSocketAddress& self_address,
std::unique_ptr<DatagramClientSocket> socket,
std::unique_ptr<QuicChromiumPacketWriter> writer,
std::unique_ptr<QuicChromiumPacketReader> reader) override;
void OnProbeFailed(NetworkChangeNotifier::NetworkHandle network,
const quic::QuicSocketAddress& peer_address) override;
bool OnSendConnectivityProbingPacket(
QuicChromiumPacketWriter* writer,
const quic::QuicSocketAddress& peer_address) override;
// quic::QuicSpdySession methods:
size_t WriteHeadersOnHeadersStream(
quic::QuicStreamId id,
spdy::SpdyHeaderBlock headers,
bool fin,
const spdy::SpdyStreamPrecedence& precedence,
ack_listener) override;
void UnregisterStreamPriority(quic::QuicStreamId id, bool is_static) override;
void UpdateStreamPriority(
quic::QuicStreamId id,
const spdy::SpdyStreamPrecedence& new_precedence) override;
// quic::QuicSession methods:
void OnStreamFrame(const quic::QuicStreamFrame& frame) override;
QuicChromiumClientStream* CreateOutgoingBidirectionalStream() override;
QuicChromiumClientStream* CreateOutgoingUnidirectionalStream() override;
const quic::QuicCryptoClientStream* GetCryptoStream() const override;
quic::QuicCryptoClientStream* GetMutableCryptoStream() override;
void CloseStream(quic::QuicStreamId stream_id) override;
void SendRstStream(quic::QuicStreamId id,
quic::QuicRstStreamErrorCode error,
quic::QuicStreamOffset bytes_written) override;
void OnCryptoHandshakeEvent(CryptoHandshakeEvent event) override;
void OnCryptoHandshakeMessageSent(
const quic::CryptoHandshakeMessage& message) override;
void OnCryptoHandshakeMessageReceived(
const quic::CryptoHandshakeMessage& message) override;
void OnGoAway(const quic::QuicGoAwayFrame& frame) override;
void OnRstStream(const quic::QuicRstStreamFrame& frame) override;
void OnCanCreateNewOutgoingStream(bool unidirectional) override;
// QuicClientSessionBase methods:
void OnConfigNegotiated() override;
void OnProofValid(
const quic::QuicCryptoClientConfig::CachedState& cached) override;
void OnProofVerifyDetailsAvailable(
const quic::ProofVerifyDetails& verify_details) override;
// quic::QuicConnectionVisitorInterface methods:
void OnConnectionClosed(const quic::QuicConnectionCloseFrame& frame,
quic::ConnectionCloseSource source) override;
void OnSuccessfulVersionNegotiation(
const quic::ParsedQuicVersion& version) override;
void OnConnectivityProbeReceived(
const quic::QuicSocketAddress& self_address,
const quic::QuicSocketAddress& peer_address) override;
void OnPathDegrading() override;
bool ShouldKeepConnectionAlive() const override;
// QuicChromiumPacketReader::Visitor methods:
void OnReadError(int result, const DatagramClientSocket* socket) override;
bool OnPacket(const quic::QuicReceivedPacket& packet,
const quic::QuicSocketAddress& local_address,
const quic::QuicSocketAddress& peer_address) override;
// MultiplexedSession methods:
bool GetRemoteEndpoint(IPEndPoint* endpoint) override;
bool GetSSLInfo(SSLInfo* ssl_info) const override;
// Performs a crypto handshake with the server.
int CryptoConnect(CompletionOnceCallback callback);
// Causes the QuicConnectionHelper to start reading from all sockets
// and passing the data along to the quic::QuicConnection.
void StartReading();
// Close the session because of |net_error| and notifies the factory
// that this session has been closed, which will delete the session.
// |behavior| will suggest whether we should send connection close packets
// when closing the connection.
void CloseSessionOnError(int net_error,
quic::QuicErrorCode quic_error,
quic::ConnectionCloseBehavior behavior);
// Close the session because of |net_error| and notifies the factory
// that this session has been closed later, which will delete the session.
// |behavior| will suggest whether we should send connection close packets
// when closing the connection.
void CloseSessionOnErrorLater(int net_error,
quic::QuicErrorCode quic_error,
quic::ConnectionCloseBehavior behavior);
base::Value GetInfoAsValue(const std::set<HostPortPair>& aliases);
const NetLogWithSource& net_log() const { return net_log_; }
// Returns a Handle to this session.
std::unique_ptr<QuicChromiumClientSession::Handle> CreateHandle(
const HostPortPair& destination);
// Returns the number of client hello messages that have been sent on the
// crypto stream. If the handshake has completed then this is one greater
// than the number of round-trips needed for the handshake.
int GetNumSentClientHellos() const;
// Returns true if |hostname| may be pooled onto this session. If this
// is a secure QUIC session, then |hostname| must match the certificate
// presented during the handshake.
bool CanPool(const std::string& hostname,
PrivacyMode privacy_mode,
const SocketTag& socket_tag,
const NetworkIsolationKey& network_isolation_key) const;
const quic::QuicServerId& server_id() const {
return session_key_.server_id();
const QuicSessionKey& quic_session_key() const { return session_key_; }
// Attempts to migrate session when |writer| encounters a write error.
// If |writer| is no longer actively used, abort migration.
void MigrateSessionOnWriteError(int error_code,
quic::QuicPacketWriter* writer);
// Helper method that completes connection/server migration.
// Unblocks packet writer on network level. If the writer becomes unblocked
// then, OnWriteUnblocked() will be invoked to send packet after migration.
void WriteToNewSocket();
// Migrates session over to use |peer_address| and |network|.
// If |network| is kInvalidNetworkHandle, default network is used. If the
// migration fails and |close_session_on_error| is true, session will be
// closed.
MigrationResult Migrate(NetworkChangeNotifier::NetworkHandle network,
IPEndPoint peer_address,
bool close_session_on_error,
const NetLogWithSource& migration_net_log);
// Migrates session onto new socket, i.e., sets |writer| to be the new
// default writer and post a task to write to |socket|. |reader| *must*
// has been started reading from the socket. Returns true if
// socket was successfully added to the session and the session was
// successfully migrated to using the new socket. Returns true on
// successful migration, or false if number of migrations exceeds
// kMaxReadersPerQuicSession. Takes ownership of |socket|, |reader|,
// and |writer|.
bool MigrateToSocket(std::unique_ptr<DatagramClientSocket> socket,
std::unique_ptr<QuicChromiumPacketReader> reader,
std::unique_ptr<QuicChromiumPacketWriter> writer);
// Called when NetworkChangeNotifier notifies observers of a newly
// connected network. Migrates this session to the newly connected
// network if the session has a pending migration.
void OnNetworkConnected(NetworkChangeNotifier::NetworkHandle network,
const NetLogWithSource& net_log);
// Called when NetworkChangeNotifier broadcasts to observers of
// |disconnected_network|.
void OnNetworkDisconnectedV2(
NetworkChangeNotifier::NetworkHandle disconnected_network,
const NetLogWithSource& migration_net_log);
// Called when NetworkChangeNotifier broadcats to observers of a new default
// network. Migrates this session to |new_network| if appropriate.
void OnNetworkMadeDefault(NetworkChangeNotifier::NetworkHandle new_network,
const NetLogWithSource& migration_net_log);
// Schedules a migration alarm to wait for a new network.
void OnNoNewNetwork();
// Called when migration alarm fires. If migration has not occurred
// since alarm was set, closes session with error.
void OnMigrationTimeout(size_t num_sockets);
// Populates network error details for this session.
void PopulateNetErrorDetails(NetErrorDetails* details) const;
// Returns current default socket. This is the socket over which all
// QUIC packets are sent. This default socket can change, so do not store the
// returned socket.
const DatagramClientSocket* GetDefaultSocket() const;
bool IsAuthorized(const std::string& hostname) override;
bool HandlePromised(quic::QuicStreamId associated_id,
quic::QuicStreamId promised_id,
const spdy::SpdyHeaderBlock& headers) override;
void DeletePromised(quic::QuicClientPromisedInfo* promised) override;
void OnPushStreamTimedOut(quic::QuicStreamId stream_id) override;
// Cancels the push if the push stream for |url| has not been claimed and is
// still active. Otherwise, no-op.
void CancelPush(const GURL& url);
const LoadTimingInfo::ConnectTiming& GetConnectTiming();
quic::QuicTransportVersion GetQuicVersion() const;
// Returns the estimate of dynamically allocated memory in bytes.
// See base/trace_event/memory_usage_estimator.h.
// TODO(xunjieli): It only tracks |packet_readers_|. Write a better estimate.
size_t EstimateMemoryUsage() const;
bool require_confirmation() const { return require_confirmation_; }
// quic::QuicSession methods:
bool ShouldCreateIncomingStream(quic::QuicStreamId id) override;
bool ShouldCreateOutgoingBidirectionalStream() override;
bool ShouldCreateOutgoingUnidirectionalStream() override;
QuicChromiumClientStream* CreateIncomingStream(
quic::QuicStreamId id) override;
QuicChromiumClientStream* CreateIncomingStream(
quic::PendingStream* pending) override;
friend class test::QuicChromiumClientSessionPeer;
typedef std::set<Handle*> HandleSet;
typedef std::list<StreamRequest*> StreamRequestQueue;
bool WasConnectionEverUsed();
QuicChromiumClientStream* CreateOutgoingReliableStreamImpl(
const NetworkTrafficAnnotationTag& traffic_annotation);
QuicChromiumClientStream* CreateIncomingReliableStreamImpl(
quic::QuicStreamId id,
const NetworkTrafficAnnotationTag& traffic_annotation);
QuicChromiumClientStream* CreateIncomingReliableStreamImpl(
quic::PendingStream* pending,
const NetworkTrafficAnnotationTag& traffic_annotation);
// A completion callback invoked when a read completes.
void OnReadComplete(int result);
void CloseAllStreams(int net_error);
void CloseAllHandles(int net_error);
void CancelAllRequests(int net_error);
void NotifyRequestsOfConfirmation(int net_error);
ProbingResult StartProbeNetwork(NetworkChangeNotifier::NetworkHandle network,
const quic::QuicSocketAddress& peer_address,
const NetLogWithSource& migration_net_log);
// Called when there is only one possible working network: |network|, If any
// error encountered, this session will be closed.
// When the migration succeeds:
// - If no longer on the default network, set timer to migrate back to the
// default network;
// - If now on the default network, cancel timer to migrate back to default
// network.
void MigrateNetworkImmediately(NetworkChangeNotifier::NetworkHandle network);
// Called when probe |network| succeeded.
void OnProbeNetworkSucceeded(
NetworkChangeNotifier::NetworkHandle network,
const quic::QuicSocketAddress& peer_address,
const quic::QuicSocketAddress& self_address,
std::unique_ptr<DatagramClientSocket> socket,
std::unique_ptr<QuicChromiumPacketWriter> writer,
std::unique_ptr<QuicChromiumPacketReader> reader);
// Called when probe |network| failed.
void OnProbeNetworkFailed(NetworkChangeNotifier::NetworkHandle network,
const quic::QuicSocketAddress& peer_address);
void StartMigrateBackToDefaultNetworkTimer(base::TimeDelta delay);
void CancelMigrateBackToDefaultNetworkTimer();
void TryMigrateBackToDefaultNetwork(base::TimeDelta timeout);
void MaybeRetryMigrateBackToDefaultNetwork();
// If migrate idle session is enabled, returns true and post a task to close
// the connection if session's idle time exceeds the |idle_migration_period_|.
// If migrate idle session is not enabled, returns true and posts a task to
// close the connection if session doesn't have outstanding streams.
bool CheckIdleTimeExceedsIdleMigrationPeriod();
// Close non-migratable streams in both directions by sending reset stream to
// peer when connection migration attempts to migrate to the alternate
// network.
void ResetNonMigratableStreams();
void LogMetricsOnNetworkDisconnected();
void LogMetricsOnNetworkMadeDefault();
void LogConnectionMigrationResultToHistogram(
QuicConnectionMigrationStatus status);
void LogHandshakeStatusOnConnectionMigrationSignal() const;
void HistogramAndLogMigrationFailure(const NetLogWithSource& net_log,
QuicConnectionMigrationStatus status,
quic::QuicConnectionId connection_id,
const std::string& reason);
void HistogramAndLogMigrationSuccess(const NetLogWithSource& net_log,
quic::QuicConnectionId connection_id);
// Notifies the factory that this session is going away and no more streams
// should be created from it. This needs to be called before closing any
// streams, because closing a stream may cause a new stream to be created.
void NotifyFactoryOfSessionGoingAway();
// Posts a task to notify the factory that this session has been closed.
void NotifyFactoryOfSessionClosedLater();
// Notifies the factory that this session has been closed which will
// delete |this|.
void NotifyFactoryOfSessionClosed();
QuicSessionKey session_key_;
bool require_confirmation_;
bool migrate_session_early_v2_;
bool migrate_session_on_network_change_v2_;
bool migrate_idle_session_;
// Session can be migrated if its idle time is within this period.
base::TimeDelta idle_migration_period_;
base::TimeDelta max_time_on_non_default_network_;
// Maximum allowed number of migrations to non-default network triggered by
// packet write error per default network.
int max_migrations_to_non_default_network_on_write_error_;
int current_migrations_to_non_default_network_on_write_error_;
// Maximum allowed number of migrations to non-default network triggered by
// path degrading per default network.
int max_migrations_to_non_default_network_on_path_degrading_;
int current_migrations_to_non_default_network_on_path_degrading_;
quic::QuicClock* clock_; // Unowned.
int yield_after_packets_;
quic::QuicTime::Delta yield_after_duration_;
bool go_away_on_path_degrading_;
base::TimeTicks most_recent_path_degrading_timestamp_;
base::TimeTicks most_recent_network_disconnected_timestamp_;
const base::TickClock* tick_clock_;
base::TimeTicks most_recent_stream_close_time_;
int most_recent_write_error_;
base::TimeTicks most_recent_write_error_timestamp_;
std::unique_ptr<quic::QuicCryptoClientStream> crypto_stream_;
QuicStreamFactory* stream_factory_;
std::vector<std::unique_ptr<DatagramClientSocket>> sockets_;
TransportSecurityState* transport_security_state_;
SSLConfigService* ssl_config_service_;
std::unique_ptr<QuicServerInfo> server_info_;
std::unique_ptr<CertVerifyResult> cert_verify_result_;
std::unique_ptr<ct::CTVerifyResult> ct_verify_result_;
std::string pinning_failure_log_;
bool pkp_bypassed_;
bool is_fatal_cert_error_;
HandleSet handles_;
StreamRequestQueue stream_requests_;
std::vector<CompletionOnceCallback> waiting_for_confirmation_callbacks_;
CompletionOnceCallback callback_;
size_t num_total_streams_;
base::SequencedTaskRunner* task_runner_;
NetLogWithSource net_log_;
std::vector<std::unique_ptr<QuicChromiumPacketReader>> packet_readers_;
LoadTimingInfo::ConnectTiming connect_timing_;
std::unique_ptr<QuicConnectionLogger> logger_;
// True when the session is going away, and streams may no longer be created
// on this session. Existing stream will continue to be processed.
bool going_away_;
// True when the session receives a go away from server due to port migration.
bool port_migration_detected_;
// Not owned. |push_delegate_| outlives the session and handles server pushes
// received by session.
ServerPushDelegate* push_delegate_;
// UMA histogram counters for streams pushed to this session.
int streams_pushed_count_;
int streams_pushed_and_claimed_count_;
uint64_t bytes_pushed_count_;
uint64_t bytes_pushed_and_unclaimed_count_;
// Stores the packet that witnesses socket write error. This packet will be
// written to an alternate socket when the migration completes and the
// alternate socket is unblocked.
scoped_refptr<QuicChromiumPacketWriter::ReusableIOBuffer> packet_;
// Stores the latest default network platform marks.
NetworkChangeNotifier::NetworkHandle default_network_;
QuicConnectivityProbingManager probing_manager_;
int retry_migrate_back_count_;
base::OneShotTimer migrate_back_to_default_timer_;
ConnectionMigrationCause current_connection_migration_cause_;
// True if a packet needs to be sent when packet writer is unblocked to
// complete connection migration. The packet can be a cached packet if
// |packet_| is set, a queued packet, or a PING packet.
bool send_packet_after_migration_;
// True if migration is triggered, and there is no alternate network to
// migrate to.
bool wait_for_new_network_;
// True if read errors should be ignored. Set when migration on write error is
// posted and unset until the first packet is written after migration.
bool ignore_read_error_;
// If true, client headers will include HTTP/2 stream dependency info derived
// from spdy::SpdyStreamPrecedence.
bool headers_include_h2_stream_dependency_;
Http2PriorityDependencies priority_dependency_state_;
base::WeakPtrFactory<QuicChromiumClientSession> weak_factory_{this};
} // namespace net