blob: c032b4fb45141d858a75e3a9977f182933b49250 [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 QuicSession subclass. This class owns the underlying
// 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 "net/base/completion_callback.h"
#include "net/base/load_timing_info.h"
#include "net/base/net_error_details.h"
#include "net/base/net_export.h"
#include "net/cert/ct_verify_result.h"
#include "net/log/net_log_with_source.h"
#include "net/proxy/proxy_server.h"
#include "net/quic/chromium/quic_chromium_client_stream.h"
#include "net/quic/chromium/quic_chromium_packet_reader.h"
#include "net/quic/chromium/quic_chromium_packet_writer.h"
#include "net/quic/chromium/quic_connection_logger.h"
#include "net/quic/core/quic_client_session_base.h"
#include "net/quic/core/quic_crypto_client_stream.h"
#include "net/quic/core/quic_packets.h"
#include "net/quic/core/quic_server_id.h"
#include "net/quic/core/quic_time.h"
#include "net/socket/socket_performance_watcher.h"
#include "net/spdy/server_push_delegate.h"
namespace net {
class CertVerifyResult;
class DatagramClientSocket;
class NetLog;
class QuicCryptoClientStreamFactory;
class QuicServerInfo;
class QuicStreamFactory;
class SSLInfo;
class TransportSecurityState;
using TokenBindingSignatureMap =
base::MRUCache<std::pair<TokenBindingType, std::string>,
namespace test {
class QuicChromiumClientSessionPeer;
} // namespace test
class NET_EXPORT_PRIVATE QuicChromiumClientSession
: public QuicClientSessionBase,
public QuicChromiumPacketReader::Visitor,
public QuicChromiumPacketWriter::Delegate {
// An interface for observing events on a session.
class NET_EXPORT_PRIVATE Observer {
virtual ~Observer() {}
virtual void OnCryptoHandshakeConfirmed() = 0;
virtual void OnSuccessfulVersionNegotiation(const QuicVersion& version) = 0;
virtual void OnSessionClosed(int error, bool port_migration_detected) = 0;
// A helper class used to manage a request to create a stream.
class NET_EXPORT_PRIVATE StreamRequest {
// 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(const base::WeakPtr<QuicChromiumClientSession>& session,
QuicChromiumClientStream** stream,
const CompletionCallback& callback);
// Cancels any pending stream creation request. May be called
// repeatedly.
void CancelRequest();
friend class QuicChromiumClientSession;
// Called by |session_| for an asynchronous request when the stream
// request has finished successfully.
void OnRequestCompleteSuccess(QuicChromiumClientStream* 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);
base::WeakPtr<QuicChromiumClientSession> session_;
CompletionCallback callback_;
QuicChromiumClientStream** stream_;
// For tracking how much time pending stream requests wait.
base::TimeTicks pending_start_time_;
// 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.
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,
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,
base::TaskRunner* task_runner,
std::unique_ptr<SocketPerformanceWatcher> socket_performance_watcher,
NetLog* net_log);
~QuicChromiumClientSession() override;
void Initialize() override;
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
// 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,
QuicChromiumClientStream** stream);
// Cancels the pending stream creation request.
void CancelRequest(StreamRequest* request);
// QuicChromiumPacketWriter::Delegate override.
int HandleWriteError(int error_code,
scoped_refptr<StringIOBuffer> last_packet) override;
void OnWriteError(int error_code) override;
void OnWriteUnblocked() override;
// QuicSpdySession methods:
void OnHeadersHeadOfLineBlocking(QuicTime::Delta delta) override;
// QuicSession methods:
void OnStreamFrame(const QuicStreamFrame& frame) override;
QuicChromiumClientStream* CreateOutgoingDynamicStream(
SpdyPriority priority) override;
QuicCryptoClientStream* GetCryptoStream() override;
void CloseStream(QuicStreamId stream_id) override;
void SendRstStream(QuicStreamId id,
QuicRstStreamErrorCode error,
QuicStreamOffset bytes_written) override;
void OnCryptoHandshakeEvent(CryptoHandshakeEvent event) override;
void OnCryptoHandshakeMessageSent(
const CryptoHandshakeMessage& message) override;
void OnCryptoHandshakeMessageReceived(
const CryptoHandshakeMessage& message) override;
void OnGoAway(const QuicGoAwayFrame& frame) override;
void OnRstStream(const QuicRstStreamFrame& frame) override;
// QuicClientSessionBase methods:
void OnConfigNegotiated() override;
void OnProofValid(const QuicCryptoClientConfig::CachedState& cached) override;
void OnProofVerifyDetailsAvailable(
const ProofVerifyDetails& verify_details) override;
// QuicConnectionVisitorInterface methods:
void OnConnectionClosed(QuicErrorCode error,
const std::string& error_details,
ConnectionCloseSource source) override;
void OnSuccessfulVersionNegotiation(const QuicVersion& version) override;
void OnPathDegrading() override;
bool HasOpenDynamicStreams() const override;
// QuicChromiumPacketReader::Visitor methods:
void OnReadError(int result, const DatagramClientSocket* socket) override;
bool OnPacket(const QuicReceivedPacket& packet,
IPEndPoint local_address,
IPEndPoint peer_address) override;
// Gets the SSL connection information.
bool GetSSLInfo(SSLInfo* ssl_info) const;
// Generates the signature used in Token Binding using key |*key| and for a
// Token Binding of type |tb_type|, putting the signature in |*out|. Returns a
// net error code.
Error GetTokenBindingSignature(crypto::ECPrivateKey* key,
TokenBindingType tb_type,
std::vector<uint8_t>* out);
// Performs a crypto handshake with the server.
int CryptoConnect(bool require_confirmation,
const CompletionCallback& callback);
// Resumes a crypto handshake with the server after a timeout.
int ResumeCryptoConnect(const CompletionCallback& callback);
// Causes the QuicConnectionHelper to start reading from all sockets
// and passing the data along to the QuicConnection.
void StartReading();
// Close the session because of |error| and notifies the factory
// that this session has been closed, which will delete the session.
void CloseSessionOnError(int error, QuicErrorCode quic_error);
// Close the session because of |error| and notifies the factory later that
// this session has been closed, which will delete the session.
void CloseSessionOnErrorAndNotifyFactoryLater(int error,
QuicErrorCode quic_error);
std::unique_ptr<base::Value> GetInfoAsValue(
const std::set<HostPortPair>& aliases);
const NetLogWithSource& net_log() const { return net_log_; }
base::WeakPtr<QuicChromiumClientSession> GetWeakPtr();
// 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 the stream id of the push stream if it is not claimed yet, or 0
// otherwise.
QuicStreamId GetStreamIdForPush(const GURL& pushed_url);
// 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;
const QuicServerId& server_id() const { return server_id_; }
// Attempts to migrate session when a write error is encountered.
void MigrateSessionOnWriteError();
// Helper method that writes a packet on the new socket after
// migration completes. If not null, the packet_ member is written,
// otherwise a PING packet is written.
void WriteToNewSocket();
// Migrates session onto new socket, i.e., starts reading from
// |socket| in addition to any previous sockets, and sets |writer|
// to be the new default writer. 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);
// 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);
// 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;
// Returns true if session has one ore more streams marked as non-migratable.
bool HasNonMigratableStreams() const;
bool HandlePromised(QuicStreamId associated_id,
QuicStreamId promised_id,
const SpdyHeaderBlock& headers) override;
void DeletePromised(QuicClientPromisedInfo* promised) override;
void OnPushStreamTimedOut(QuicStreamId stream_id) override;
void set_push_delegate(ServerPushDelegate* push_delegate) {
push_delegate_ = push_delegate;
// 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();
QuicVersion GetQuicVersion() const;
// QuicSession methods:
bool ShouldCreateIncomingDynamicStream(QuicStreamId id) override;
bool ShouldCreateOutgoingDynamicStream() override;
QuicChromiumClientStream* CreateIncomingDynamicStream(
QuicStreamId id) override;
friend class test::QuicChromiumClientSessionPeer;
typedef std::set<Observer*> ObserverSet;
typedef std::list<StreamRequest*> StreamRequestQueue;
QuicChromiumClientStream* CreateOutgoingReliableStreamImpl();
QuicChromiumClientStream* CreateIncomingReliableStreamImpl(QuicStreamId id);
// A completion callback invoked when a read completes.
void OnReadComplete(int result);
void OnClosedStream();
// Close the session because of |error| and records it in UMA histogram.
void RecordAndCloseSessionOnError(int error, QuicErrorCode quic_error);
// A Session may be closed via any of three methods:
// OnConnectionClosed - called by the connection when the connection has been
// closed, perhaps due to a timeout or a protocol error.
// CloseSessionOnError - called from the owner of the session,
// the QuicStreamFactory, when there is an error.
// OnReadComplete - when there is a read error.
// This method closes all stream and performs any necessary cleanup.
void CloseSessionOnErrorInner(int net_error, QuicErrorCode quic_error);
void CloseAllStreams(int net_error);
void CloseAllObservers(int net_error);
// 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();
QuicServerId server_id_;
bool require_confirmation_;
std::unique_ptr<QuicCryptoClientStream> crypto_stream_;
QuicStreamFactory* stream_factory_;
std::vector<std::unique_ptr<DatagramClientSocket>> sockets_;
TransportSecurityState* transport_security_state_;
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_;
ObserverSet observers_;
StreamRequestQueue stream_requests_;
CompletionCallback callback_;
size_t num_total_streams_;
base::TaskRunner* 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_;
TokenBindingSignatureMap token_binding_signatures_;
// 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 packet that witnesses socket write error. This packet is
// written to a new socket after migration completes.
scoped_refptr<StringIOBuffer> packet_;
// TODO(jri): Replace use of migration_pending_ sockets_.size().
// When a task is posted for MigrateSessionOnError, pass in
// sockets_.size(). Then in MigrateSessionOnError, check to see if
// the current sockets_.size() == the passed in value.
bool migration_pending_; // True while migration is underway.
base::WeakPtrFactory<QuicChromiumClientSession> weak_factory_;
} // namespace net