net/quic/quic_connection_logger.h

   1 // Copyright (c) 2013 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_CONNECTION_LOGGER_H_
   6 #define NET_QUIC_QUIC_CONNECTION_LOGGER_H_
   7
   8 #include <bitset>
   9
  10 #include "net/base/ip_endpoint.h"
  11 #include "net/base/network_change_notifier.h"
  12 #include "net/log/net_log.h"
  13 #include "net/quic/quic_connection.h"
  14 #include "net/quic/quic_protocol.h"
  15 #include "net/quic/quic_session.h"
  16
  17 namespace net {
  18 namespace test {
  19 class QuicConnectionLoggerPeer;
  20 }  // namespace test
  21
  22 class CryptoHandshakeMessage;
  23 class CertVerifyResult;
  24
  25 // This class is a debug visitor of a QuicConnection which logs
  26 // events to |net_log|.
  27 class NET_EXPORT_PRIVATE QuicConnectionLogger
  28     : public QuicConnectionDebugVisitor {
  29  public:
  30   QuicConnectionLogger(QuicSession* session,
  31                        const char* const connection_description,
  32                        const BoundNetLog& net_log);
  33
  34   ~QuicConnectionLogger() override;
  35
  36   // QuicPacketGenerator::DebugDelegateInterface
  37   void OnFrameAddedToPacket(const QuicFrame& frame) override;
  38
  39   // QuicConnectionDebugVisitorInterface
  40   void OnPacketSent(const SerializedPacket& serialized_packet,
  41                     QuicPacketSequenceNumber original_sequence_number,
  42                     EncryptionLevel level,
  43                     TransmissionType transmission_type,
  44                     const QuicEncryptedPacket& packet,
  45                     QuicTime sent_time) override;
  46   void OnPacketReceived(const IPEndPoint& self_address,
  47                         const IPEndPoint& peer_address,
  48                         const QuicEncryptedPacket& packet) override;
  49   void OnIncorrectConnectionId(QuicConnectionId connection_id) override;
  50   void OnUndecryptablePacket() override;
  51   void OnDuplicatePacket(QuicPacketSequenceNumber sequence_number) override;
  52   void OnProtocolVersionMismatch(QuicVersion version) override;
  53   void OnPacketHeader(const QuicPacketHeader& header) override;
  54   void OnStreamFrame(const QuicStreamFrame& frame) override;
  55   void OnAckFrame(const QuicAckFrame& frame) override;
  56   void OnStopWaitingFrame(const QuicStopWaitingFrame& frame) override;
  57   void OnRstStreamFrame(const QuicRstStreamFrame& frame) override;
  58   void OnConnectionCloseFrame(const QuicConnectionCloseFrame& frame) override;
  59   void OnWindowUpdateFrame(const QuicWindowUpdateFrame& frame) override;
  60   void OnBlockedFrame(const QuicBlockedFrame& frame) override;
  61   void OnGoAwayFrame(const QuicGoAwayFrame& frame) override;
  62   void OnPingFrame(const QuicPingFrame& frame) override;
  63   void OnPublicResetPacket(const QuicPublicResetPacket& packet) override;
  64   void OnVersionNegotiationPacket(
  65       const QuicVersionNegotiationPacket& packet) override;
  66   void OnRevivedPacket(const QuicPacketHeader& revived_header,
  67                        base::StringPiece payload) override;
  68   void OnConnectionClosed(QuicErrorCode error, bool from_peer) override;
  69   void OnSuccessfulVersionNegotiation(const QuicVersion& version) override;
  70
  71   void OnCryptoHandshakeMessageReceived(
  72       const CryptoHandshakeMessage& message);
  73   void OnCryptoHandshakeMessageSent(
  74       const CryptoHandshakeMessage& message);
  75   void UpdateReceivedFrameCounts(QuicStreamId stream_id,
  76                                  int num_frames_received,
  77                                  int num_duplicate_frames_received);
  78   void OnCertificateVerified(const CertVerifyResult& result);
  79
  80   // Returns connection's overall packet loss rate in fraction.
  81   float ReceivedPacketLossRate() const;
  82
  83  private:
  84   friend class test::QuicConnectionLoggerPeer;
  85
  86   // Do a factory get for a histogram for recording data, about individual
  87   // packet sequence numbers, that was gathered in the vectors
  88   // received_packets_ and received_acks_. |statistic_name| identifies which
  89   // element of data is recorded, and is used to form the histogram name.
  90   base::HistogramBase* GetPacketSequenceNumberHistogram(
  91       const char* statistic_name) const;
  92   // Do a factory get for a histogram to record a 6-packet loss-sequence as a
  93   // sample. The histogram will record the 64 distinct possible combinations.
  94   // |which_6| is used to adjust the name of the histogram to distinguish the
  95   // first 6 packets in a connection, vs. some later 6 packets.
  96   base::HistogramBase* Get6PacketHistogram(const char* which_6) const;
  97   // Do a factory get for a histogram to record cumulative stats across a 21
  98   // packet sequence.  |which_21| is used to adjust the name of the histogram
  99   // to distinguish the first 21 packets' loss data, vs. some later 21 packet
 100   // sequences' loss data.
 101   base::HistogramBase* Get21CumulativeHistogram(const char* which_21) const;
 102   // Add samples associated with a |bit_mask_of_packets| to the given histogram
 103   // that was provided by Get21CumulativeHistogram().  The LSB of that mask
 104   // corresponds to the oldest packet sequence number in the series of packets,
 105   // and the bit in the 2^20 position corresponds to the most recently received
 106   // packet.  Of the maximum of 21 bits that are valid (correspond to packets),
 107   // only the most significant |valid_bits_in_mask| are processed.
 108   // A bit value of 0 indicates that a packet was never received, and a 1
 109   // indicates the packet was received.
 110   static void AddTo21CumulativeHistogram(base::HistogramBase* histogram,
 111                                          int bit_mask_of_packets,
 112                                          int valid_bits_in_mask);
 113   // For connections longer than 21 received packets, this call will calculate
 114   // the overall packet loss rate, and record it into a histogram.
 115   void RecordAggregatePacketLossRate() const;
 116   // At destruction time, this records results of |pacaket_received_| into
 117   // histograms for specific connection types.
 118   void RecordLossHistograms() const;
 119
 120   BoundNetLog net_log_;
 121   QuicSession* session_;  // Unowned.
 122   // The last packet sequence number received.
 123   QuicPacketSequenceNumber last_received_packet_sequence_number_;
 124   // The size of the most recently received packet.
 125   size_t last_received_packet_size_;
 126   // The size of the previously received packet.
 127   size_t previous_received_packet_size_;
 128   // The largest packet sequence number received.  In the case where a packet is
 129   // received late (out of order), this value will not be updated.
 130   QuicPacketSequenceNumber largest_received_packet_sequence_number_;
 131   // The largest packet sequence number which the peer has failed to
 132   // receive, according to the missing packet set in their ack frames.
 133   QuicPacketSequenceNumber largest_received_missing_packet_sequence_number_;
 134   // Number of times that the current received packet sequence number is
 135   // smaller than the last received packet sequence number.
 136   size_t num_out_of_order_received_packets_;
 137   // Number of times that the current received packet sequence number is
 138   // smaller than the last received packet sequence number and where the
 139   // size of the current packet is larger than the size of the previous
 140   // packet.
 141   size_t num_out_of_order_large_received_packets_;
 142   // The number of times that OnPacketHeader was called.
 143   // If the network replicates packets, then this number may be slightly
 144   // different from the real number of distinct packets received.
 145   QuicPacketCount num_packets_received_;
 146   // Number of times a truncated ACK frame was sent.
 147   size_t num_truncated_acks_sent_;
 148   // Number of times a truncated ACK frame was received.
 149   size_t num_truncated_acks_received_;
 150   // The kCADR value provided by the server in ServerHello.
 151   IPEndPoint local_address_from_shlo_;
 152   // The first local address from which a packet was received.
 153   IPEndPoint local_address_from_self_;
 154   // Count of the number of frames received.
 155   int num_frames_received_;
 156   // Count of the number of duplicate frames received.
 157   int num_duplicate_frames_received_;
 158   // Count of the number of packets received with incorrect connection IDs.
 159   int num_incorrect_connection_ids_;
 160   // Count of the number of undecryptable packets received.
 161   int num_undecryptable_packets_;
 162   // Count of the number of duplicate packets received.
 163   int num_duplicate_packets_;
 164   // Count of the number of BLOCKED frames received.
 165   int num_blocked_frames_received_;
 166   // Count of the number of BLOCKED frames sent.
 167   int num_blocked_frames_sent_;
 168   // Vector of inital packets status' indexed by packet sequence numbers, where
 169   // false means never received.  Zero is not a valid packet sequence number, so
 170   // that offset is never used, and we'll track 150 packets.
 171   std::bitset<151> received_packets_;
 172   // Vector to indicate which of the initial 150 received packets turned out to
 173   // contain solo ACK frames.  An element is true iff an ACK frame was in the
 174   // corresponding packet, and there was very little else.
 175   std::bitset<151> received_acks_;
 176   // The available type of connection (WiFi, 3G, etc.) when connection was first
 177   // used.
 178   const char* const connection_description_;
 179
 180   DISALLOW_COPY_AND_ASSIGN(QuicConnectionLogger);
 181 };
 182
 183 }  // namespace net
 184
 185 #endif  // NET_QUIC_QUIC_CONNECTION_LOGGER_H_