Line data    Source code

       1             : /*
       2             :  * Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
       3             :  */
       4             : 
       5             : #ifndef __XMPP_CHANNEL_H__
       6             : #define __XMPP_CHANNEL_H__
       7             : 
       8             : #include <atomic>
       9             : #include <boost/asio/ip/tcp.hpp>
      10             : #include <boost/scoped_ptr.hpp>
      11             : #include <tbb/spin_mutex.h>
      12             : 
      13             : #include "base/timer.h"
      14             : #include "base/lifetime.h"
      15             : #include "base/address.h"
      16             : #include "xmpp/xmpp_channel_mux.h"
      17             : #include "xmpp/xmpp_state_machine.h"
      18             : #include "xmpp/xmpp_session.h"
      19             : 
      20             : class LifetimeActor;
      21             : class ShowXmppConnection;
      22             : class TcpServer;
      23             : class TcpSession;
      24             : class XmppChannelConfig;
      25             : class XmppClient;
      26             : class XmppConnectionEndpoint;
      27             : class XmppServer;
      28             : class XmppSession;
      29             : 
      30             : class XmppConnection {
      31             : public:
      32             :     struct ProtoStats {
      33       23206 :         ProtoStats() {
      34       23206 :             open = 0;
      35       23206 :             close = 0;
      36       23206 :             keepalive = 0;
      37       23206 :             update = 0;
      38       23206 :         }
      39         208 :         void swap(ProtoStats& other) {
      40         416 :             open.store(other.open.exchange(open));
      41         416 :             close.store(other.close.exchange(close));
      42         416 :             keepalive.store(other.keepalive.exchange(keepalive));
      43         416 :             update.store(other.update.exchange(update));
      44         208 :         }
      45             :         std::atomic<uint32_t> open;
      46             :         std::atomic<uint32_t> close;
      47             :         std::atomic<uint32_t> keepalive;
      48             :         std::atomic<uint32_t> update;
      49             :     };
      50             : 
      51             :     struct ErrorStats {
      52       11603 :         ErrorStats() {
      53       11603 :             connect_error = 0;
      54       11603 :             session_close = 0;
      55       11603 :             open_fail = 0;
      56       11603 :             stream_feature_fail = 0;
      57       11603 :             handshake_fail = 0;
      58       11603 :         }
      59         104 :         void swap(ErrorStats& other) {
      60         208 :             connect_error.store(other.connect_error.exchange(connect_error));
      61         208 :             session_close.store(other.session_close.exchange(session_close));
      62         208 :             open_fail.store(other.open_fail.exchange(open_fail));
      63         208 :             stream_feature_fail.store(other.stream_feature_fail.exchange(stream_feature_fail));
      64         208 :             handshake_fail.store(other.handshake_fail.exchange(handshake_fail));
      65         104 :         }
      66             :         std::atomic<uint32_t> connect_error;
      67             :         std::atomic<uint32_t> session_close;
      68             :         std::atomic<uint32_t> open_fail;
      69             :         std::atomic<uint32_t> stream_feature_fail;
      70             :         std::atomic<uint32_t> handshake_fail;
      71             :     };
      72             : 
      73             :     XmppConnection(TcpServer *server, const XmppChannelConfig *config);
      74             :     virtual ~XmppConnection();
      75             : 
      76             :     void SetConfig(const XmppChannelConfig *);
      77             : 
      78             :     // Invoked from XmppServer when a session is accepted.
      79             :     virtual bool AcceptSession(XmppSession *session);
      80             :     virtual void ReceiveMsg(XmppSession *session, const std::string &);
      81             : 
      82             :     virtual boost::asio::ip::tcp::endpoint endpoint() const;
      83             :     virtual boost::asio::ip::tcp::endpoint local_endpoint() const;
      84             :     std::string endpoint_string() const;
      85             :     std::string local_endpoint_string() const;
      86       73069 :     TcpServer *server() { return server_; }
      87             :     XmppSession *CreateSession();
      88       83897 :     int GetTaskInstance() const { return GetTaskInstance(is_client_); }
      89             : 
      90             :     const std::string &ToUVEKey() const;
      91             :     const std::string &ToString() const;
      92             :     const std::string &FromString() const;
      93             :     void SetAdminDown(bool toggle);
      94             :     bool Send(const uint8_t *data, size_t size,
      95             :               const std::string *msg_str = NULL);
      96             : 
      97             :     // Xmpp connection messages
      98             :     virtual bool SendOpen(XmppSession *session);
      99             :     virtual bool SendOpenConfirm(XmppSession *session);
     100             :     virtual bool SendStreamFeatureRequest(XmppSession *session);
     101             :     virtual bool SendStartTls(XmppSession *session);
     102             :     virtual bool SendProceedTls(XmppSession *session);
     103             : 
     104             :     void SendKeepAlive();
     105             :     void SendClose(XmppSession *session);
     106             : 
     107             :     // Ssl Handshake callback response
     108             :     void ProcessSslHandShakeResponse(SslSessionPtr session,
     109             :         const boost::system::error_code& error);
     110             : 
     111             :     // PubSub Messages
     112             :     int ProcessXmppIqMessage(const XmppStanza::XmppMessage *);
     113             : 
     114             :     // chat messages
     115             :     int ProcessXmppChatMessage(const XmppStanza::XmppChatMessage *);
     116             : 
     117             :     void StartKeepAliveTimer();
     118             :     void StopKeepAliveTimer();
     119             :     void UpdateKeepAliveTimer(uint8_t time_out);
     120             : 
     121             :     void set_session(XmppSession *session);
     122             :     void clear_session();
     123             :     void SetTo(const std::string &);
     124             : 
     125             :     const XmppSession *session() const;
     126             :     XmppSession *session();
     127             : 
     128     4242545 :     bool logUVE() const { return !is_client_ && log_uve_; }
     129       37648 :     bool IsClient() const { return is_client_; }
     130             :     virtual void ManagedDelete() = 0;
     131             :     virtual void RetryDelete() = 0;
     132             :     virtual LifetimeActor *deleter() = 0;
     133             :     virtual const LifetimeActor *deleter() const = 0;
     134             :     virtual LifetimeManager *lifetime_manager() = 0;
     135             :     xmsm::XmState GetStateMcState() const;
     136             :     xmsm::XmOpenConfirmState GetStateMcOpenConfirmState() const;
     137             : 
     138       25449 :     bool IsActiveChannel() const {
     139       25449 :         return state_machine_->IsActiveChannel();
     140             :     }
     141      119756 :     XmppChannelMux *ChannelMux() {return mux_.get(); }
     142           1 :     void SetChannelMux(XmppChannelMux *channel_mux) { mux_.reset(channel_mux); }
     143             : 
     144       11541 :     void Initialize() { state_machine_->Initialize(); }
     145        2692 :     void Clear() { state_machine_->Clear(); }
     146        3765 :     void SetAdminState(bool down) { state_machine_->SetAdminState(down); }
     147             : 
     148             :     void Shutdown();
     149             :     bool MayDelete() const;
     150             :     bool IsDeleted() const;
     151             : 
     152         155 :     std::string &GetComputeHostName() { return to_; }
     153             :     std::string &GetControllerHostName() { return from_; }
     154             : 
     155             :     std::string &GetFrom() { return from_; }
     156     3970498 :     std::string &GetTo() { return to_; }
     157             : 
     158             :     virtual void set_close_reason(const std::string &reason) = 0;
     159             :     virtual void increment_flap_count() = 0;
     160             :     virtual uint32_t flap_count() const = 0;
     161             :     virtual const std::string last_flap_at() const = 0;
     162             : 
     163             :     virtual void WriteReady();
     164             : 
     165             :     friend class XmppStateMachineTest;
     166             : 
     167         487 :     int GetConfiguredHoldTime() const {
     168         487 :         return state_machine_->GetConfiguredHoldTime();
     169             :     }
     170             : 
     171         974 :     int GetNegotiatedHoldTime() const {
     172         974 :         return state_machine_->hold_time();
     173             :     }
     174             : 
     175        1046 :     std::string StateName() const {
     176        1046 :         return state_machine_->StateName();
     177             :     }
     178             : 
     179         562 :     std::string LastStateName() const {
     180         562 :         return state_machine_->LastStateName();
     181             :     }
     182             : 
     183         559 :     std::string LastStateChangeAt() const {
     184         559 :         return state_machine_->LastStateChangeAt();
     185             :     }
     186             : 
     187         559 :     std::string LastEvent() const {
     188         559 :         return state_machine_->last_event();
     189             :     }
     190             : 
     191         546 :     uint32_t tx_open() const {
     192         546 :         return stats_[1].open;
     193             :     }
     194         546 :     uint32_t tx_keepalive() const {
     195         546 :         return stats_[1].keepalive;
     196             :     }
     197         546 :     uint32_t tx_close() const {
     198         546 :         return stats_[1].close;
     199             :     }
     200         546 :     uint32_t tx_update() const {
     201         546 :         return stats_[1].update;
     202             :     }
     203             : 
     204         546 :     uint32_t rx_open() const {
     205         546 :         return stats_[0].open;
     206             :     }
     207         546 :     uint32_t rx_keepalive() const {
     208         546 :         return stats_[0].keepalive;
     209             :     }
     210         546 :     uint32_t rx_close() const {
     211         546 :         return stats_[0].close;
     212             :     }
     213         546 :     uint32_t rx_update() const {
     214         546 :         return stats_[0].update;
     215             :     }
     216             : 
     217             :     void LogMsg(std::string msg);
     218     1170391 :     bool disable_read() const { return disable_read_; }
     219           0 :     void set_disable_read(bool disable_read) { disable_read_ = disable_read; }
     220             :     XmppStateMachine *state_machine();
     221             :     const XmppStateMachine *state_machine() const;
     222             : 
     223             :     void set_state_machine(XmppStateMachine *state_machine) {
     224             :         state_machine_.reset(state_machine);
     225             :     }
     226             : 
     227         104 :     void SwapXmppStateMachine(XmppConnection *other) {
     228         104 :         state_machine_.swap(other->state_machine_);
     229         104 :     }
     230          72 :     uint8_t dscp_value() const { return dscp_value_; }
     231             :     int SetDscpValue(uint8_t value);
     232             : 
     233             :     void inc_connect_error();
     234             :     void inc_session_close();
     235             :     void inc_open_fail();
     236             :     void inc_stream_feature_fail();
     237             :     void inc_handshake_failure();
     238             :     size_t get_connect_error();
     239             :     size_t get_session_close();
     240             :     size_t get_open_fail();
     241             :     size_t get_stream_feature_fail();
     242             :     size_t get_handshake_failure();
     243             :     size_t get_sm_connect_attempts();
     244             :     size_t get_sm_keepalive_count();
     245             : 
     246             :     static const char *kAuthTypeNil;
     247             :     static const char *kAuthTypeTls;
     248             :     std::string GetXmppAuthenticationType() const;
     249             :     void SwapContents(XmppConnection *other);
     250     4330919 :     boost::asio::ip::tcp::endpoint &endpoint() { return endpoint_; }
     251        1436 :     const Timer *keepalive_timer() const { return keepalive_timer_; }
     252             : 
     253             : protected:
     254             :     TcpServer *server_;
     255             :     XmppSession *session_;
     256             :     const XmppChannelMux *channel_mux() const;
     257             : 
     258             : private:
     259             :     bool KeepAliveTimerExpired();
     260             :     void KeepaliveTimerErrorHanlder(std::string error_name,
     261             :                                     std::string error_message);
     262             :     XmppStanza::XmppMessage *XmppDecode(const std::string &msg);
     263             :     void LogKeepAliveSend();
     264             :     int GetTaskInstance(bool is_client) const;
     265             :     void IncProtoStats(unsigned int type);
     266             : 
     267             :     boost::asio::ip::tcp::endpoint endpoint_;
     268             :     boost::asio::ip::tcp::endpoint local_endpoint_;
     269             :     const XmppChannelConfig *config_;
     270             : 
     271             :     // Protection for session_ and keepalive_timer_
     272             :     tbb::spin_mutex spin_mutex_;
     273             :     Timer *keepalive_timer_;
     274             : 
     275             :     bool is_client_;
     276             :     bool log_uve_;
     277             :     bool admin_down_;
     278             :     bool disable_read_;
     279             :     std::string from_; // bare jid
     280             :     std::string to_;
     281             :     bool auth_enabled_;
     282             :     uint8_t dscp_value_;
     283             :     std::string xmlns_;
     284             :     mutable std::string uve_key_str_;
     285             : 
     286             :     boost::scoped_ptr<XmppStateMachine> state_machine_;
     287             :     boost::scoped_ptr<XmppChannelMux> mux_;
     288             :     std::unique_ptr<XmppStanza::XmppMessage> last_msg_;
     289             : 
     290             :     ProtoStats stats_[2];
     291             :     ErrorStats error_stats_;
     292             : 
     293             :     DISALLOW_COPY_AND_ASSIGN(XmppConnection);
     294             : };
     295             : 
     296             : class XmppServerConnection : public XmppConnection {
     297             : public:
     298             :     XmppServerConnection(XmppServer *server, const XmppChannelConfig *config);
     299             :     virtual ~XmppServerConnection();
     300             : 
     301             :     virtual void ManagedDelete();
     302             :     virtual void RetryDelete();
     303             :     virtual LifetimeActor *deleter();
     304             :     virtual const LifetimeActor *deleter() const;
     305             :     virtual LifetimeManager *lifetime_manager();
     306             :     XmppServer *server();
     307             : 
     308             :     virtual void set_close_reason(const std::string &reason);
     309             :     virtual uint32_t flap_count() const;
     310             :     virtual void increment_flap_count();
     311             :     virtual const std::string last_flap_at() const;
     312             : 
     313        6543 :     bool duplicate() const { return duplicate_; }
     314           0 :     void set_duplicate() { duplicate_ = true; }
     315             : 
     316       19215 :     bool on_work_queue() const { return on_work_queue_; }
     317        6543 :     void set_on_work_queue() { on_work_queue_ = true; }
     318        6543 :     void clear_on_work_queue() { on_work_queue_ = false; }
     319             : 
     320       25518 :     XmppConnectionEndpoint *conn_endpoint() { return conn_endpoint_; }
     321       12408 :     void set_conn_endpoint(XmppConnectionEndpoint *conn_endpoint) {
     322       12408 :         conn_endpoint_ = conn_endpoint;
     323       12408 :     }
     324             :     void FillShowInfo(ShowXmppConnection *show_connection) const;
     325             : 
     326             : private:
     327             :     class DeleteActor;
     328             : 
     329             :     bool duplicate_;
     330             :     bool on_work_queue_;
     331             :     XmppConnectionEndpoint *conn_endpoint_;
     332             :     boost::scoped_ptr<DeleteActor> deleter_;
     333             :     LifetimeRef<XmppServerConnection> server_delete_ref_;
     334             : };
     335             : 
     336             : class XmppClientConnection : public XmppConnection {
     337             : public:
     338             :     XmppClientConnection(XmppClient *server, const XmppChannelConfig *config);
     339             :     virtual ~XmppClientConnection();
     340             : 
     341             :     virtual void ManagedDelete();
     342             :     virtual void RetryDelete();
     343             :     virtual LifetimeActor *deleter();
     344             :     virtual const LifetimeActor *deleter() const;
     345             :     virtual LifetimeManager *lifetime_manager();
     346             :     XmppClient *server();
     347             : 
     348             :     virtual void set_close_reason(const std::string &reason);
     349             :     virtual uint32_t flap_count() const;
     350             :     virtual void increment_flap_count();
     351             :     virtual const std::string last_flap_at() const;
     352             : 
     353             : private:
     354             :     class DeleteActor;
     355             : 
     356             :     std::string close_reason_;
     357             :     uint32_t flap_count_;
     358             :     uint64_t last_flap_;
     359             :     boost::scoped_ptr<DeleteActor> deleter_;
     360             :     LifetimeRef<XmppClientConnection> server_delete_ref_;
     361             : };
     362             : 
     363             : class XmppConnectionEndpoint {
     364             : public:
     365             :     XmppConnectionEndpoint(const std::string &client);
     366             : 
     367             :     void set_close_reason(const std::string &close_reason);
     368             :     uint32_t flap_count() const;
     369             :     void increment_flap_count();
     370             :     uint64_t last_flap() const;
     371             :     const std::string last_flap_at() const;
     372             :     XmppConnection *connection();
     373             :     const XmppConnection *connection() const;
     374             :     void set_connection(XmppConnection *connection);
     375             :     void reset_connection();
     376             : 
     377             : private:
     378             :     std::string client_;
     379             :     std::string close_reason_;
     380             :     uint32_t flap_count_;
     381             :     uint64_t last_flap_;
     382             :     XmppConnection *connection_;
     383             : };
     384             : 
     385             : #endif // __XMPP_CHANNEL_H__