net/quic/quic_stream_factory.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef NET_QUIC_QUIC_STREAM_FACTORY_H_
   6 #define NET_QUIC_QUIC_STREAM_FACTORY_H_
   7
   8 #include <list>
   9 #include <map>
  10 #include <string>
  11 #include <vector>
  12
  13 #include "base/logging.h"
  14 #include "base/memory/weak_ptr.h"
  15 #include "net/base/address_list.h"
  16 #include "net/base/completion_callback.h"
  17 #include "net/base/host_port_pair.h"
  18 #include "net/base/network_change_notifier.h"
  19 #include "net/cert/cert_database.h"
  20 #include "net/log/net_log.h"
  21 #include "net/proxy/proxy_server.h"
  22 #include "net/quic/network_connection.h"
  23 #include "net/quic/quic_config.h"
  24 #include "net/quic/quic_crypto_stream.h"
  25 #include "net/quic/quic_http_stream.h"
  26 #include "net/quic/quic_protocol.h"
  27
  28 namespace net {
  29
  30 class CertVerifier;
  31 class ChannelIDService;
  32 class ClientSocketFactory;
  33 class HostResolver;
  34 class HttpServerProperties;
  35 class QuicClock;
  36 class QuicClientSession;
  37 class QuicConnectionHelper;
  38 class QuicCryptoClientStreamFactory;
  39 class QuicRandom;
  40 class QuicServerInfoFactory;
  41 class QuicServerId;
  42 class QuicStreamFactory;
  43 class TransportSecurityState;
  44
  45 namespace test {
  46 class QuicStreamFactoryPeer;
  47 }  // namespace test
  48
  49 // Encapsulates a pending request for a QuicHttpStream.
  50 // If the request is still pending when it is destroyed, it will
  51 // cancel the request with the factory.
  52 class NET_EXPORT_PRIVATE QuicStreamRequest {
  53  public:
  54   explicit QuicStreamRequest(QuicStreamFactory* factory);
  55   ~QuicStreamRequest();
  56
  57   // For http, |is_https| is false.
  58   int Request(const HostPortPair& host_port_pair,
  59               bool is_https,
  60               PrivacyMode privacy_mode,
  61               base::StringPiece method,
  62               const BoundNetLog& net_log,
  63               const CompletionCallback& callback);
  64
  65   void OnRequestComplete(int rv);
  66
  67   scoped_ptr<QuicHttpStream> ReleaseStream();
  68
  69   void set_stream(scoped_ptr<QuicHttpStream> stream);
  70
  71   const BoundNetLog& net_log() const{
  72     return net_log_;
  73   }
  74
  75  private:
  76   QuicStreamFactory* factory_;
  77   HostPortPair host_port_pair_;
  78   BoundNetLog net_log_;
  79   CompletionCallback callback_;
  80   scoped_ptr<QuicHttpStream> stream_;
  81
  82   DISALLOW_COPY_AND_ASSIGN(QuicStreamRequest);
  83 };
  84
  85 // A factory for creating new QuicHttpStreams on top of a pool of
  86 // QuicClientSessions.
  87 class NET_EXPORT_PRIVATE QuicStreamFactory
  88     : public NetworkChangeNotifier::IPAddressObserver,
  89       public CertDatabase::Observer {
  90  public:
  91   QuicStreamFactory(
  92       HostResolver* host_resolver,
  93       ClientSocketFactory* client_socket_factory,
  94       base::WeakPtr<HttpServerProperties> http_server_properties,
  95       CertVerifier* cert_verifier,
  96       ChannelIDService* channel_id_service,
  97       TransportSecurityState* transport_security_state,
  98       QuicCryptoClientStreamFactory* quic_crypto_client_stream_factory,
  99       QuicRandom* random_generator,
 100       QuicClock* clock,
 101       size_t max_packet_length,
 102       const std::string& user_agent_id,
 103       const QuicVersionVector& supported_versions,
 104       bool enable_port_selection,
 105       bool always_require_handshake_confirmation,
 106       bool disable_connection_pooling,
 107       float load_server_info_timeout_srtt_multiplier,
 108       bool enable_connection_racing,
 109       bool enable_non_blocking_io,
 110       bool disable_disk_cache,
 111       int max_number_of_lossy_connections,
 112       float packet_loss_threshold,
 113       int socket_receive_buffer_size,
 114       const QuicTagVector& connection_options);
 115   ~QuicStreamFactory() override;
 116
 117   // Creates a new QuicHttpStream to |host_port_pair| which will be
 118   // owned by |request|. |is_https| specifies if the protocol is https or not.
 119   // If a matching session already exists, this method will return OK.  If no
 120   // matching session exists, this will return ERR_IO_PENDING and will invoke
 121   // OnRequestComplete asynchronously.
 122   int Create(const HostPortPair& host_port_pair,
 123              bool is_https,
 124              PrivacyMode privacy_mode,
 125              base::StringPiece method,
 126              const BoundNetLog& net_log,
 127              QuicStreamRequest* request);
 128
 129   // Returns false if |packet_loss_rate| is less than |packet_loss_threshold_|
 130   // otherwise it returns true and closes the session and marks QUIC as recently
 131   // broken for the port of the session. Increments
 132   // |number_of_lossy_connections_| by port.
 133   bool OnHandshakeConfirmed(QuicClientSession* session, float packet_loss_rate);
 134
 135   // Returns true if QUIC is disabled for this port.
 136   bool IsQuicDisabled(uint16 port);
 137
 138   // Called by a session when it becomes idle.
 139   void OnIdleSession(QuicClientSession* session);
 140
 141   // Called by a session when it is going away and no more streams should be
 142   // created on it.
 143   void OnSessionGoingAway(QuicClientSession* session);
 144
 145   // Called by a session after it shuts down.
 146   void OnSessionClosed(QuicClientSession* session);
 147
 148   // Called by a session whose connection has timed out.
 149   void OnSessionConnectTimeout(QuicClientSession* session);
 150
 151   // Cancels a pending request.
 152   void CancelRequest(QuicStreamRequest* request);
 153
 154   // Closes all current sessions.
 155   void CloseAllSessions(int error);
 156
 157   base::Value* QuicStreamFactoryInfoToValue() const;
 158
 159   // Delete all cached state objects in |crypto_config_|.
 160   void ClearCachedStatesInCryptoConfig();
 161
 162   // NetworkChangeNotifier::IPAddressObserver methods:
 163
 164   // Until the servers support roaming, close all connections when the local
 165   // IP address changes.
 166   void OnIPAddressChanged() override;
 167
 168   // CertDatabase::Observer methods:
 169
 170   // We close all sessions when certificate database is changed.
 171   void OnCertAdded(const X509Certificate* cert) override;
 172   void OnCACertChanged(const X509Certificate* cert) override;
 173
 174   bool require_confirmation() const {
 175     return require_confirmation_;
 176   }
 177
 178   void set_require_confirmation(bool require_confirmation);
 179
 180   QuicConnectionHelper* helper() { return helper_.get(); }
 181
 182   bool enable_port_selection() const { return enable_port_selection_; }
 183
 184   bool has_quic_server_info_factory() {
 185     return quic_server_info_factory_ != NULL;
 186   }
 187
 188   void set_quic_server_info_factory(
 189       QuicServerInfoFactory* quic_server_info_factory) {
 190     DCHECK(!quic_server_info_factory_);
 191     quic_server_info_factory_ = quic_server_info_factory;
 192   }
 193
 194   bool enable_connection_racing() const { return enable_connection_racing_; }
 195   void set_enable_connection_racing(bool enable_connection_racing) {
 196     enable_connection_racing_ = enable_connection_racing;
 197   }
 198
 199  private:
 200   class Job;
 201   friend class test::QuicStreamFactoryPeer;
 202
 203   // The key used to find session by ip. Includes
 204   // the ip address, port, and scheme.
 205   struct NET_EXPORT_PRIVATE IpAliasKey {
 206     IpAliasKey();
 207     IpAliasKey(IPEndPoint ip_endpoint, bool is_https);
 208     ~IpAliasKey();
 209
 210     IPEndPoint ip_endpoint;
 211     bool is_https;
 212
 213     // Needed to be an element of std::set.
 214     bool operator<(const IpAliasKey &other) const;
 215     bool operator==(const IpAliasKey &other) const;
 216   };
 217
 218   typedef std::map<QuicServerId, QuicClientSession*> SessionMap;
 219   typedef std::map<QuicClientSession*, QuicServerId> SessionIdMap;
 220   typedef std::set<QuicServerId> AliasSet;
 221   typedef std::map<QuicClientSession*, AliasSet> SessionAliasMap;
 222   typedef std::set<QuicClientSession*> SessionSet;
 223   typedef std::map<IpAliasKey, SessionSet> IPAliasMap;
 224   typedef std::map<QuicServerId, QuicCryptoClientConfig*> CryptoConfigMap;
 225   typedef std::set<Job*> JobSet;
 226   typedef std::map<QuicServerId, JobSet> JobMap;
 227   typedef std::map<QuicStreamRequest*, QuicServerId> RequestMap;
 228   typedef std::set<QuicStreamRequest*> RequestSet;
 229   typedef std::map<QuicServerId, RequestSet> ServerIDRequestsMap;
 230
 231   // Creates a job which doesn't wait for server config to be loaded from the
 232   // disk cache. This job is started via a PostTask.
 233   void CreateAuxilaryJob(const QuicServerId server_id,
 234                          bool is_post,
 235                          const BoundNetLog& net_log);
 236
 237   // Returns a newly created QuicHttpStream owned by the caller, if a
 238   // matching session already exists.  Returns NULL otherwise.
 239   scoped_ptr<QuicHttpStream> CreateIfSessionExists(const QuicServerId& key,
 240                                                    const BoundNetLog& net_log);
 241
 242   bool OnResolution(const QuicServerId& server_id,
 243                     const AddressList& address_list);
 244   void OnJobComplete(Job* job, int rv);
 245   bool HasActiveSession(const QuicServerId& server_id) const;
 246   bool HasActiveJob(const QuicServerId& server_id) const;
 247   int CreateSession(const QuicServerId& server_id,
 248                     scoped_ptr<QuicServerInfo> quic_server_info,
 249                     const AddressList& address_list,
 250                     base::TimeTicks dns_resolution_end_time,
 251                     const BoundNetLog& net_log,
 252                     QuicClientSession** session);
 253   void ActivateSession(const QuicServerId& key,
 254                        QuicClientSession* session);
 255
 256   // Returns |srtt| in micro seconds from ServerNetworkStats. Returns 0 if there
 257   // is no |http_server_properties_| or if |http_server_properties_| doesn't
 258   // have ServerNetworkStats for the given |server_id|.
 259   int64 GetServerNetworkStatsSmoothedRttInMicroseconds(
 260       const QuicServerId& server_id) const;
 261
 262   // Helper methods.
 263   bool WasQuicRecentlyBroken(const QuicServerId& server_id) const;
 264   bool CryptoConfigCacheIsEmpty(const QuicServerId& server_id);
 265
 266   // Initializes the cached state associated with |server_id| in
 267   // |crypto_config_| with the information in |server_info|.
 268   void InitializeCachedStateInCryptoConfig(
 269       const QuicServerId& server_id,
 270       const scoped_ptr<QuicServerInfo>& server_info);
 271
 272   void ProcessGoingAwaySession(QuicClientSession* session,
 273                                const QuicServerId& server_id,
 274                                bool was_session_active);
 275
 276   bool require_confirmation_;
 277   HostResolver* host_resolver_;
 278   ClientSocketFactory* client_socket_factory_;
 279   base::WeakPtr<HttpServerProperties> http_server_properties_;
 280   TransportSecurityState* transport_security_state_;
 281   QuicServerInfoFactory* quic_server_info_factory_;
 282   QuicCryptoClientStreamFactory* quic_crypto_client_stream_factory_;
 283   QuicRandom* random_generator_;
 284   scoped_ptr<QuicClock> clock_;
 285   const size_t max_packet_length_;
 286
 287   // The helper used for all connections.
 288   scoped_ptr<QuicConnectionHelper> helper_;
 289
 290   // Contains owning pointers to all sessions that currently exist.
 291   SessionIdMap all_sessions_;
 292   // Contains non-owning pointers to currently active session
 293   // (not going away session, once they're implemented).
 294   SessionMap active_sessions_;
 295   // Map from session to set of aliases that this session is known by.
 296   SessionAliasMap session_aliases_;
 297   // Map from IP address to sessions which are connected to this address.
 298   IPAliasMap ip_aliases_;
 299
 300   // Origins which have gone away recently.
 301   AliasSet gone_away_aliases_;
 302
 303   const QuicConfig config_;
 304   QuicCryptoClientConfig crypto_config_;
 305
 306   JobMap active_jobs_;
 307   ServerIDRequestsMap job_requests_map_;
 308   RequestMap active_requests_;
 309
 310   QuicVersionVector supported_versions_;
 311
 312   // Determine if we should consistently select a client UDP port. If false,
 313   // then we will just let the OS select a random client port for each new
 314   // connection.
 315   bool enable_port_selection_;
 316
 317   // Set if we always require handshake confirmation. If true, this will
 318   // introduce at least one RTT for the handshake before the client sends data.
 319   bool always_require_handshake_confirmation_;
 320
 321   // Set if we do not want connection pooling.
 322   bool disable_connection_pooling_;
 323
 324   // Specifies the ratio between time to load QUIC server information from disk
 325   // cache to 'smoothed RTT'. This ratio is used to calculate the timeout in
 326   // milliseconds to wait for loading of QUIC server information. If we don't
 327   // want to timeout, set |load_server_info_timeout_srtt_multiplier_| to 0.
 328   float load_server_info_timeout_srtt_multiplier_;
 329
 330   // Set if we want to race connections - one connection that sends
 331   // INCHOATE_HELLO and another connection that sends CHLO after loading server
 332   // config from the disk cache.
 333   bool enable_connection_racing_;
 334
 335   // Set if experimental non-blocking IO should be used on windows sockets.
 336   bool enable_non_blocking_io_;
 337
 338   // Set if we do not want to load server config from the disk cache.
 339   bool disable_disk_cache_;
 340
 341   // Set if we want to disable QUIC when there is high packet loss rate.
 342   // Specifies the maximum number of connections with high packet loss in a row
 343   // after which QUIC will be disabled.
 344   int max_number_of_lossy_connections_;
 345   // Specifies packet loss rate in fraction after which a connection is closed
 346   // and is considered as a lossy connection.
 347   float packet_loss_threshold_;
 348   // Count number of lossy connections by port.
 349   std::map<uint16, int> number_of_lossy_connections_;
 350
 351   // Size of the UDP receive buffer.
 352   int socket_receive_buffer_size_;
 353
 354   // Each profile will (probably) have a unique port_seed_ value.  This value
 355   // is used to help seed a pseudo-random number generator (PortSuggester) so
 356   // that we consistently (within this profile) suggest the same ephemeral
 357   // port when we re-connect to any given server/port.  The differences between
 358   // profiles (probablistically) prevent two profiles from colliding in their
 359   // ephemeral port requests.
 360   uint64 port_seed_;
 361
 362   // Local address of socket that was created in CreateSession.
 363   IPEndPoint local_address_;
 364   bool check_persisted_supports_quic_;
 365   std::set<HostPortPair> quic_supported_servers_at_startup_;
 366
 367   NetworkConnection network_connection_;
 368
 369   base::TaskRunner* task_runner_;
 370
 371   base::WeakPtrFactory<QuicStreamFactory> weak_factory_;
 372
 373   DISALLOW_COPY_AND_ASSIGN(QuicStreamFactory);
 374 };
 375
 376 }  // namespace net
 377
 378 #endif  // NET_QUIC_QUIC_STREAM_FACTORY_H_