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/net_log.h"
  19 #include "net/base/network_change_notifier.h"
  20 #include "net/cert/cert_database.h"
  21 #include "net/proxy/proxy_server.h"
  22 #include "net/quic/quic_config.h"
  23 #include "net/quic/quic_crypto_stream.h"
  24 #include "net/quic/quic_http_stream.h"
  25 #include "net/quic/quic_protocol.h"
  26
  27 namespace net {
  28
  29 class CertVerifier;
  30 class ChannelIDService;
  31 class ClientSocketFactory;
  32 class HostResolver;
  33 class HttpServerProperties;
  34 class QuicClock;
  35 class QuicClientSession;
  36 class QuicConnectionHelper;
  37 class QuicCryptoClientStreamFactory;
  38 class QuicRandom;
  39 class QuicServerInfoFactory;
  40 class QuicServerId;
  41 class QuicStreamFactory;
  42 class TransportSecurityState;
  43
  44 namespace test {
  45 class QuicStreamFactoryPeer;
  46 }  // namespace test
  47
  48 // Encapsulates a pending request for a QuicHttpStream.
  49 // If the request is still pending when it is destroyed, it will
  50 // cancel the request with the factory.
  51 class NET_EXPORT_PRIVATE QuicStreamRequest {
  52  public:
  53   explicit QuicStreamRequest(QuicStreamFactory* factory);
  54   ~QuicStreamRequest();
  55
  56   // For http, |is_https| is false.
  57   int Request(const HostPortPair& host_port_pair,
  58               bool is_https,
  59               PrivacyMode privacy_mode,
  60               base::StringPiece method,
  61               const BoundNetLog& net_log,
  62               const CompletionCallback& callback);
  63
  64   void OnRequestComplete(int rv);
  65
  66   scoped_ptr<QuicHttpStream> ReleaseStream();
  67
  68   void set_stream(scoped_ptr<QuicHttpStream> stream);
  69
  70   const BoundNetLog& net_log() const{
  71     return net_log_;
  72   }
  73
  74  private:
  75   QuicStreamFactory* factory_;
  76   HostPortPair host_port_pair_;
  77   bool is_https_;
  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 enable_time_based_loss_detection,
 106       bool always_require_handshake_confirmation,
 107       const QuicTagVector& connection_options);
 108   virtual ~QuicStreamFactory();
 109
 110   // Creates a new QuicHttpStream to |host_port_pair| which will be
 111   // owned by |request|. |is_https| specifies if the protocol is https or not.
 112   // If a matching session already exists, this method will return OK.  If no
 113   // matching session exists, this will return ERR_IO_PENDING and will invoke
 114   // OnRequestComplete asynchronously.
 115   int Create(const HostPortPair& host_port_pair,
 116              bool is_https,
 117              PrivacyMode privacy_mode,
 118              base::StringPiece method,
 119              const BoundNetLog& net_log,
 120              QuicStreamRequest* request);
 121
 122   // Called by a session when it becomes idle.
 123   void OnIdleSession(QuicClientSession* session);
 124
 125   // Called by a session when it is going away and no more streams should be
 126   // created on it.
 127   void OnSessionGoingAway(QuicClientSession* session);
 128
 129   // Called by a session after it shuts down.
 130   void OnSessionClosed(QuicClientSession* session);
 131
 132   // Called by a session whose connection has timed out.
 133   void OnSessionConnectTimeout(QuicClientSession* session);
 134
 135   // Cancels a pending request.
 136   void CancelRequest(QuicStreamRequest* request);
 137
 138   // Closes all current sessions.
 139   void CloseAllSessions(int error);
 140
 141   base::Value* QuicStreamFactoryInfoToValue() const;
 142
 143   // Delete all cached state objects in |crypto_config_|.
 144   void ClearCachedStatesInCryptoConfig();
 145
 146   // NetworkChangeNotifier::IPAddressObserver methods:
 147
 148   // Until the servers support roaming, close all connections when the local
 149   // IP address changes.
 150   virtual void OnIPAddressChanged() OVERRIDE;
 151
 152   // CertDatabase::Observer methods:
 153
 154   // We close all sessions when certificate database is changed.
 155   virtual void OnCertAdded(const X509Certificate* cert) OVERRIDE;
 156   virtual void OnCACertChanged(const X509Certificate* cert) OVERRIDE;
 157
 158   bool require_confirmation() const {
 159     return require_confirmation_;
 160   }
 161
 162   void set_require_confirmation(bool require_confirmation) {
 163     require_confirmation_ = require_confirmation;
 164   }
 165
 166   QuicConnectionHelper* helper() { return helper_.get(); }
 167
 168   bool enable_port_selection() const { return enable_port_selection_; }
 169
 170   bool has_quic_server_info_factory() {
 171     return quic_server_info_factory_ != NULL;
 172   }
 173
 174   void set_quic_server_info_factory(
 175       QuicServerInfoFactory* quic_server_info_factory) {
 176     DCHECK(!quic_server_info_factory_);
 177     quic_server_info_factory_ = quic_server_info_factory;
 178   }
 179
 180  private:
 181   class Job;
 182   friend class test::QuicStreamFactoryPeer;
 183
 184   // The key used to find session by ip. Includes
 185   // the ip address, port, and scheme.
 186   struct NET_EXPORT_PRIVATE IpAliasKey {
 187     IpAliasKey();
 188     IpAliasKey(IPEndPoint ip_endpoint, bool is_https);
 189     ~IpAliasKey();
 190
 191     IPEndPoint ip_endpoint;
 192     bool is_https;
 193
 194     // Needed to be an element of std::set.
 195     bool operator<(const IpAliasKey &other) const;
 196     bool operator==(const IpAliasKey &other) const;
 197   };
 198
 199   typedef std::map<QuicServerId, QuicClientSession*> SessionMap;
 200   typedef std::map<QuicClientSession*, QuicServerId> SessionIdMap;
 201   typedef std::set<QuicServerId> AliasSet;
 202   typedef std::map<QuicClientSession*, AliasSet> SessionAliasMap;
 203   typedef std::set<QuicClientSession*> SessionSet;
 204   typedef std::map<IpAliasKey, SessionSet> IPAliasMap;
 205   typedef std::map<QuicServerId, QuicCryptoClientConfig*> CryptoConfigMap;
 206   typedef std::map<QuicServerId, Job*> JobMap;
 207   typedef std::map<QuicStreamRequest*, Job*> RequestMap;
 208   typedef std::set<QuicStreamRequest*> RequestSet;
 209   typedef std::map<Job*, RequestSet> JobRequestsMap;
 210
 211   // Returns a newly created QuicHttpStream owned by the caller, if a
 212   // matching session already exists.  Returns NULL otherwise.
 213   scoped_ptr<QuicHttpStream> CreateIfSessionExists(const QuicServerId& key,
 214                                                    const BoundNetLog& net_log);
 215
 216   bool OnResolution(const QuicServerId& server_id,
 217                     const AddressList& address_list);
 218   void OnJobComplete(Job* job, int rv);
 219   bool HasActiveSession(const QuicServerId& server_id) const;
 220   bool HasActiveJob(const QuicServerId& server_id) const;
 221   int CreateSession(const QuicServerId& server_id,
 222                     scoped_ptr<QuicServerInfo> quic_server_info,
 223                     const AddressList& address_list,
 224                     const BoundNetLog& net_log,
 225                     QuicClientSession** session);
 226   void ActivateSession(const QuicServerId& key,
 227                        QuicClientSession* session);
 228
 229   // Initializes the cached state associated with |server_id| in
 230   // |crypto_config_| with the information in |server_info|.
 231   void InitializeCachedStateInCryptoConfig(
 232       const QuicServerId& server_id,
 233       const scoped_ptr<QuicServerInfo>& server_info);
 234
 235   void ProcessGoingAwaySession(QuicClientSession* session,
 236                                const QuicServerId& server_id,
 237                                bool was_session_active);
 238
 239   bool require_confirmation_;
 240   HostResolver* host_resolver_;
 241   ClientSocketFactory* client_socket_factory_;
 242   base::WeakPtr<HttpServerProperties> http_server_properties_;
 243   TransportSecurityState* transport_security_state_;
 244   QuicServerInfoFactory* quic_server_info_factory_;
 245   QuicCryptoClientStreamFactory* quic_crypto_client_stream_factory_;
 246   QuicRandom* random_generator_;
 247   scoped_ptr<QuicClock> clock_;
 248   const size_t max_packet_length_;
 249
 250   // The helper used for all connections.
 251   scoped_ptr<QuicConnectionHelper> helper_;
 252
 253   // Contains owning pointers to all sessions that currently exist.
 254   SessionIdMap all_sessions_;
 255   // Contains non-owning pointers to currently active session
 256   // (not going away session, once they're implemented).
 257   SessionMap active_sessions_;
 258   // Map from session to set of aliases that this session is known by.
 259   SessionAliasMap session_aliases_;
 260   // Map from IP address to sessions which are connected to this address.
 261   IPAliasMap ip_aliases_;
 262
 263   // Origins which have gone away recently.
 264   AliasSet gone_away_aliases_;
 265
 266   const QuicConfig config_;
 267   QuicCryptoClientConfig crypto_config_;
 268
 269   JobMap active_jobs_;
 270   JobRequestsMap job_requests_map_;
 271   RequestMap active_requests_;
 272
 273   QuicVersionVector supported_versions_;
 274
 275   // Determine if we should consistently select a client UDP port. If false,
 276   // then we will just let the OS select a random client port for each new
 277   // connection.
 278   bool enable_port_selection_;
 279
 280   // Set if we always require handshake confirmation. If true, this will
 281   // introduce at least one RTT for the handshake before the client sends data.
 282   bool always_require_handshake_confirmation_;
 283
 284   // Each profile will (probably) have a unique port_seed_ value.  This value is
 285   // used to help seed a pseudo-random number generator (PortSuggester) so that
 286   // we consistently (within this profile) suggest the same ephemeral port when
 287   // we re-connect to any given server/port.  The differences between profiles
 288   // (probablistically) prevent two profiles from colliding in their ephemeral
 289   // port requests.
 290   uint64 port_seed_;
 291
 292   base::WeakPtrFactory<QuicStreamFactory> weak_factory_;
 293
 294   DISALLOW_COPY_AND_ASSIGN(QuicStreamFactory);
 295 };
 296
 297 }  // namespace net
 298
 299 #endif  // NET_QUIC_QUIC_STREAM_FACTORY_H_