extensions/browser/api/cast_channel/logger.h

   1 // Copyright 2014 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 EXTENSIONS_BROWSER_API_CAST_CHANNEL_LOGGER_H_
   6 #define EXTENSIONS_BROWSER_API_CAST_CHANNEL_LOGGER_H_
   7
   8 #include <deque>
   9 #include <map>
  10
  11 #include "base/basictypes.h"
  12 #include "base/memory/linked_ptr.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/threading/thread_checker.h"
  15 #include "extensions/browser/api/cast_channel/cast_socket.h"
  16 #include "extensions/browser/api/cast_channel/logger_util.h"
  17 #include "extensions/common/api/cast_channel/logging.pb.h"
  18 #include "net/base/ip_endpoint.h"
  19
  20 namespace base {
  21 class TickClock;
  22 }
  23
  24 namespace extensions {
  25 namespace core_api {
  26 namespace cast_channel {
  27
  28 struct AuthResult;
  29
  30 static const int kMaxSocketsToLog = 50;
  31 static const int kMaxEventsPerSocket = 2000;
  32
  33 // Logs information of each channel and sockets and exports the log as
  34 // a blob. Logger is done on the IO thread.
  35 class Logger : public base::RefCounted<Logger> {
  36  public:
  37   // |clock|: Clock used for generating timestamps for the events. Owned by
  38   // this class.
  39   // |unix_epoch_time_ticks|: The TimeTicks that corresponds to Unix epoch.
  40   Logger(scoped_ptr<base::TickClock> clock,
  41          base::TimeTicks unix_epoch_time_ticks);
  42
  43   // For newly created sockets. Will create an event and log a
  44   // CAST_SOCKET_CREATED event.
  45   void LogNewSocketEvent(const CastSocket& cast_socket);
  46
  47   void LogSocketEvent(int channel_id, proto::EventType event_type);
  48   void LogSocketEventWithDetails(int channel_id,
  49                                  proto::EventType event_type,
  50                                  const std::string& details);
  51
  52   // For events that involves socket / crypto operations that returns a value.
  53   void LogSocketEventWithRv(int channel_id,
  54                             proto::EventType event_type,
  55                             int rv);
  56
  57   // For *_STATE_CHANGED events.
  58   void LogSocketReadyState(int channel_id, proto::ReadyState new_state);
  59   void LogSocketConnectState(int channel_id, proto::ConnectionState new_state);
  60   void LogSocketReadState(int channel_id, proto::ReadState new_state);
  61   void LogSocketWriteState(int channel_id, proto::WriteState new_state);
  62   void LogSocketErrorState(int channel_id, proto::ErrorState new_state);
  63
  64   // For AUTH_CHALLENGE_REPLY event.
  65   void LogSocketChallengeReplyEvent(int channel_id,
  66                                     const AuthResult& auth_result);
  67
  68   void LogSocketEventForMessage(int channel_id,
  69                                 proto::EventType event_type,
  70                                 const std::string& message_namespace,
  71                                 const std::string& details);
  72
  73   // Assembles logs collected so far and return it as a serialized Log proto,
  74   // compressed in gzip format.
  75   // If serialization or compression failed, returns a NULL pointer.
  76   // |length|: If successful, assigned with size of compressed content.
  77   scoped_ptr<char[]> GetLogs(size_t* length) const;
  78
  79   // Clears the internal map.
  80   void Reset();
  81
  82   // Returns the last errors logged for |channel_id|.  If the the logs for
  83   // |channel_id| are evicted before this is called, returns a LastErrors with
  84   // no errors.  This may happen if errors are logged and retrieved in different
  85   // tasks.
  86   LastErrors GetLastErrors(int channel_id) const;
  87
  88  private:
  89   friend class base::RefCounted<Logger>;
  90   ~Logger();
  91
  92   struct AggregatedSocketEventLog {
  93    public:
  94     AggregatedSocketEventLog();
  95     ~AggregatedSocketEventLog();
  96
  97     // Partially constructed AggregatedSocketEvent proto populated by Logger.
  98     // Contains top level info such as channel ID, IP end point and channel
  99     // auth type.
 100     proto::AggregatedSocketEvent aggregated_socket_event;
 101     // Events to be assigned to the AggregatedSocketEvent proto. Contains the
 102     // most recent |kMaxEventsPerSocket| entries. The oldest events are
 103     // evicted as new events are logged.
 104     std::deque<proto::SocketEvent> socket_events;
 105
 106     // The most recent errors logged for the socket.
 107     LastErrors last_errors;
 108   };
 109
 110   typedef std::map<int, linked_ptr<AggregatedSocketEventLog> >
 111       AggregatedSocketEventLogMap;
 112
 113   // Returns a SocketEvent proto with common fields (EventType, timestamp)
 114   // populated.
 115   proto::SocketEvent CreateEvent(proto::EventType event_type);
 116
 117   // Records |event| associated with |channel_id|.
 118   // If the internal map is already logging maximum number of sockets and this
 119   // is a new socket, the socket with the smallest channel id will be discarded.
 120   // Returns a reference to the AggregatedSocketEvent proto created/modified.
 121   proto::AggregatedSocketEvent& LogSocketEvent(
 122       int channel_id,
 123       const proto::SocketEvent& socket_event);
 124
 125   scoped_ptr<base::TickClock> clock_;
 126   AggregatedSocketEventLogMap aggregated_socket_events_;
 127   base::TimeTicks unix_epoch_time_ticks_;
 128
 129   // Log proto holding global statistics.
 130   proto::Log log_;
 131
 132   base::ThreadChecker thread_checker_;
 133
 134   DISALLOW_COPY_AND_ASSIGN(Logger);
 135 };
 136 }  // namespace cast_channel
 137 }  // namespace api
 138 }  // namespace extensions
 139
 140 #endif  // EXTENSIONS_BROWSER_API_CAST_CHANNEL_LOGGER_H_