LinkTM-Capture-Software-12.15/Reference-Documentation/stream_statistics.h-Source-File

/*
 *
 * Copyright (C) 2025 Napatech A/S.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Napatech A/S nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL NAPATECH A/S BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *

 */

/**
 * @file
 *
 * This is the header file of the statistics stream interface
 */
#ifndef __STREAM_STATISTICS_H__
#define __STREAM_STATISTICS_H__

#if !defined(__NT_H__)
  #error: My interface file is 'nt.h'. Please include that via #include "nt.h" directly.
#endif

/** @addtogroup StatStream
 * @{
 *
 * The statistics stream is used to access statistics from the
 * system. The statistics stream is read only.
 *
 * Statistical information is retrieved using the @ref
 * NtStatisticsCmd_e::NT_STATISTICS_READ_CMD_QUERY_V3
 * "NT_STATISTICS_READ_CMD_QUERY_V3" command in a call to @ref NT_StatRead
 * on an open statistics stream.  This command will fill out the
 * supplied @ref NtStatistics_t structure with port and color based
 * statistics for all adapters in the system. The @ref
 * NtPortStatistics_v1_s::NtPortStatisticsValid_v1_s "NtPortStatisticsValid_v1_s" structure can
 * be used to check which returned part of the @ref NtPortStatistics_v1_s
 * structure is valid. This is useful since not all adapters support
 * all types of statistical information.
 *
 * @par
 * @note
 * Be aware that statistics from multiple adapters are only
 * synchronized if the time is synchronized.
 *
 * For an example on how to use the statistics stream see @ref
 * stat/stat_example.c "stat/stat_example.c".
 *
 * @section ColorStatistics Color Statistics
 * The color statistics for each color are found by counting the number of
 * packets getting that specific color.\n
 * The colors are specified in some assign commands using either the 'Color' or
 * 'ColorMask' options. By default all packets will get color 0. It is totally
 * up to the application what meaning that should be put into a given color.
 * The color statistics work probably best with the prioritized 'Color' option
 * where the packet gets its color from one unique source. If you use the 'ColorMask'
 * option, you can easily have a situation where one packet increments more than
 * one color counter.
 *
 * Color counters are never reset. It is the responsibility of the application to
 * handle this.
 *
 * It can be achieved by remembering the counter values for a given color
 * when it was first configured and then subsequently only showing the
 * delta compared to this initial value.
 * Another option is to set the clear flag in @ref NtStatisticsQuery_v2_s::clear
 * on the first call to @ref NT_StatRead. This will make the subsequent calls
 * to @ref NT_StatRead return only the delta compared to the first call.
 *
 * Be aware that setting this clear flag will clear all statistics counters.
 * If this is not desirable the application will have to handle it by itself.
 *
 * @par
 * @note
 * The color statistics only supports counters for colors 0-63 which could give rise
 * to confusion as you can use 32 bits in the 'ColorMask' option. Only the lower 6 bits
 * in the color field are considered when updating the color counters.
 *
 * @par
 * @note
 * Color statistics are only updated by packets that are assigned to a stream (including
 * StreamId=drop). Packets that are not matched by any NTPL filter, or are matched by a
 * filter that does not assign a StreamId (or inherit a StreamId from a previous filter),
 * will not contribute to color statistics.
 *
 * @par
 * @note The statistic stream is not thread-safe. If the same stream handle is to be used by multiple threads,
 * it must be mutex protected in the application.
 *
 */
#include "ntapi/commontypes.h"

/**
 * Possible statistics read commands
 */
enum NtStatisticsCmd_e {
  NT_STATISTICS_READ_CMD_UNKNOWN=0,      //!< Unknown read command
  NT_STATISTICS_READ_CMD_COMPAT_0,       //!< Command for backward compatibility - defined in stream_statistics_compat.h
  NT_STATISTICS_READ_CMD_COMPAT_1,       //!< Command for backward compatibility - defined in stream_statistics_compat.h
  NT_STATISTICS_READ_CMD_COMPAT_2,       //!< Command for backward compatibility - defined in stream_statistics_compat.h
  NT_STATISTICS_READ_CMD_COMPAT_3,       //!< Command for backward compatibility - defined in stream_statistics_compat.h
  NT_STATISTICS_READ_CMD_USAGE_DATA_V0,  //!< Reads hostbuffer, streamid and SDRAM usage data
  NT_STATISTICS_READ_CMD_FLOW_V0,        //!< Reads flow matcher statistics
  NT_STATISTICS_READ_CMD_FLOW_V1,        //!< Reads flow matcher statistics
  NT_STATISTICS_READ_CMD_FLOW_V2,        //!< Reads flow matcher statistics
  NT_STATISTICS_READ_CMD_QUERY_V4,       //!< Reads all the statistical information version 4
};

/**
 * RMON1 counters as defined in RFC 2819
 */
struct NtRMON1Counters_s {
  uint64_t dropEvents;           //!< Number of events where packet(s) are dropped by the MAC because they are too small or the MAC has bandwidth issues
  uint64_t octets;               //!< Number of octets received by the port (good and bad)
  uint64_t pkts;                 //!< Number of packets received by the port (good and bad)
  uint64_t broadcastPkts;        //!< Number of broadcast packets including MAC control packets
  uint64_t multicastPkts;        //!< Number of multicast packets including MAC pause and MAC control packets
  uint64_t crcAlignErrors;       //!< Number of packets with CRC/Align errors
  uint64_t undersizePkts;        //!< Number of packets < 64 octets.\n<b>Note:</b> 100G products with Xilinx FPGA drop packets smaller than 64 bytes. Packets < 64 octets are instead counted as dropEvents. The counter undersizePkts is always 0 on these products.\n <b>Note:</b> When packets with a size in the range [17..63] are transmitted on the following 1G adapters: NT4E2-4-PTP, NT4E2-4T-BP, NT4E and NT4E-STD using the segment interface, the packets will silently be padded to a size of 64 bytes, which is the size reported by @ref NtLinkCapabilities_s::minTxPktSize. For this reason they will be registered as 64 octet packets and not as an undersize packets.
  uint64_t oversizePkts;         //!< Number of packets > 1518 octets (and for NT adapters, packets > MAX and packets < 10000) If packets count here they do not count in the packet and octet counters.\n<b>Note:</b> This counter doesn't count in the TX direction for the following products: NT4E CAPTURE, NT4E-STD CAPTURE, NT20E CAPTURE.
  uint64_t fragments;            //!< Number of packets < 64 octets with errors.\n<b>Note:</b> 100G products with Xilinx FPGA drop packets smaller than 64 bytes. Packets < 64 octets are instead counted as dropEvents. The counter fragments is always 0 on these products.\n
  uint64_t jabbers;              //!< Number of packets > MAX with errors - if packets count here they do not count in the packets and octets counters
  uint64_t collisions;           //!< Number of collisions detected
  uint64_t pkts64Octets;         //!< Number of packets = 64 octets
  uint64_t pkts65to127Octets;    //!< Number of packets in the range 65 to 127 octets
  uint64_t pkts128to255Octets;   //!< Number of packets in the range 128 to 255 octets
  uint64_t pkts256to511Octets;   //!< Number of packets in the range 256 to  511 octets
  uint64_t pkts512to1023Octets;  //!< Number of packets in the range 512 to 1023 octets
  uint64_t pkts1024to1518Octets; //!< Number of packets in the range 1024 to 1518 octets
};

/**
 * Extended RMON - these counters are used to categorize packets not handled by RMON1
 */
struct NtExtendedRMONCounters_v1_s {
  uint64_t pkts1519to2047Octets;   //!< Number of packets in the range 1519 to 2047 octets
  uint64_t pkts2048to4095Octets;   //!< Number of packets in the range 2048 to 4095 octets
  uint64_t pkts4096to8191Octets;   //!< Number of packets in the range 4096 to 8191 octets
  uint64_t pkts8192toMaxOctets;    //!< Number of packets in the range 8192 to MAX octets
  uint64_t pktsHardSlice;          //!< Number of packets in the range 10001 to 16383 octets
  uint64_t pktsHardSliceJabber;    //!< Number of bad packets in the range 10001 to 16383 octets and packets > 16383 octets
  uint64_t unicastPkts;            //!< Number of Unicast packets including MAC control packets
  // The following counters are also counted as a sum in @ref NtRMON1Counters_s::crcAlignErrors.
  uint64_t pktsCrc;               //!< Number of packets with CRC errors
  uint64_t pktsAlignment;         //!< Number of packets with alignment errors
  uint64_t pktsCodeViolation;     //!< Number of packets with code violation errors
  uint64_t pktsRetransmit;
};

/**
 * Checksum counters - these counters count packets with IP/TCP/UDP errors
 */
struct NtCheckSumCounters_s {
  uint64_t pktsIpChkSumError;  //!< Number of packets with IP checksum errors
  uint64_t pktsUdpChkSumError; //!< Number of packets with UDP checksum errors
  uint64_t pktsTcpChkSumError; //!< Number of packets with TCP checksum errors
} ;

/**
 * Packet decoding counters - these counters are available on adapters with a packet decoder
 */
struct NtDecodeCounters_v1_s {
  uint64_t pktsGiantUndersize;    //!< Number of packets > 63 bytes including tags and =< 63 excluding tags
  uint64_t pktsBabyGiant;         //!< Number of packets > MAX including tags and =< MAX excluding tags
  uint64_t pktsNotIslVlanMpls;    //!< Number of packets without ISL, VLAN and MPLS
  uint64_t pktsIsl;               //!< Number of packets with ISL
  uint64_t pktsVlan;              //!< Number of packets with VLAN
  uint64_t pktsIslVlan;           //!< Number of packets with ISL and VLAN
  uint64_t pktsMpls;              //!< Number of packets with MPLS
  uint64_t pktsIslMpls;           //!< Number of packets with ISL and MPLS
  uint64_t pktsVlanMpls;          //!< Number of packets with VLAN and MPLS
  uint64_t pktsIslVlanMpls;       //!< Number of packets with ISL, VLAN and MPLS
  uint64_t pktsDuplicate;         //!< Number of packets marked as duplicates
};

/**
  * Extended drop counters - these counters will count the packets
  * dropped for various reasons
 */
struct NtExtendedDropCounters_v1_s {
  uint64_t pktsMacBandwidth;  //!< Number of packets dropped by the MAC because of bandwidth issues and number of packets < 17 octets. This counter is also available in @ref NtRMON1Counters_s::dropEvents.

  uint64_t pktsOverflow;      //!< Number of packets dropped because the associated SDRAM and host buffers are full
  uint64_t octetsOverflow;    //!< Number of octets dropped because the associated SDRAM and host buffers are full

  uint64_t pktsDedup;         //!< Number of packets dropped because of deduplication
  uint64_t octetsDedup;       //!< Number of octets dropped because of deduplication

  uint64_t pktsNoFilter;      //!< Number of packets dropped because they do not match a filter
  uint64_t octetsNoFilter;    //!< Number of octets dropped because they do not match a filter

  uint64_t pktsFilterDrop;    //!< Number of packets dropped because they are explicitly dropped
  uint64_t octetsFilterDrop;  //!< Number of octets dropped because they are explicitly dropped
};


/**
 * Color counters
 */
struct NtColorStatistics_s {
  uint64_t pkts;   //!< Number of packets
  uint64_t octets; //!< Number of octets
//

};

/**
 * Statistics info group for color statistics
 */
struct NtStatGroupColor_s {
  int supported;                          //!< Set if color statistics is supported
//

  struct NtColorStatistics_s aColor[64];  //!< The color statistics
//

  uint64_t ts;                            //!< Color counter sample time stamp. The format of the timestamp is specified by @ref tsType.
  enum NtTimestampType_e tsType;          //!< Time stamp type - For a description of the time stamp type see "DN-0384 3GD Time-Stamping and Time Synchronization User Guide"
};

/**
 * Statistics info group for adapter statistics
 */
struct NtStatGroupAdapter_s {
  struct NtStatGroupColor_s color;
};


/**
 * Statistics info for FEC
 */
struct NtFecCounters_s {
  uint64_t fecCorrCW;           //!< Corrected FEC code words
  uint64_t fecUncorrCW;         //!< Uncorrected FEC code words
  uint64_t fecCorrCWbins[16];   //!< FEC code words with [0..15] corrections
};

/**
 * FEC lane status
 */
struct NtFecLaneStatus_s {
  uint8_t  hiSer;        //!< High symbol error rate detected.
  uint8_t  mapping;      //!< Virtual lane number. Shows the virtual lane seen at the receiver.
  uint16_t skew;         //!< Virtual lane skew in bits. Notice the resolution is 40bits.
};

/**
 * PCS lane status
 */
struct NtPcsLaneStatus_s {
  uint32_t bip;          //!< BIP count: This counts the number of alignment markers seen which contain BIP errors.
  uint8_t  mapping;      //!< Virtual lane number. Shows the virtual lane seen at the receiver.
};


/**
 * Detailed link status
 */
struct NtLinkDetails_s {
  uint8_t cdrLock;          //!< CDR lock
  uint8_t blockLock;        //!< Block lock
  uint8_t amLock;           //!< AM lock
  uint8_t hiBer;            //!< Hi ber
  uint8_t localFault;       //!< Local fault
  uint8_t remoteFault;      //!< Remote fault

  struct NtFecLaneStatus_s fecLaneStatus[16]; //!< FEC lane status
  struct NtPcsLaneStatus_s pcsLaneStatus[20]; //!< PCS lane status

};

/**
 * Statistics info for IPF (IP Fragment matching table)
 */
struct NtIpFragTableCounters_s {
  uint64_t ipFragTableFirstHit;     //!< Counts all IPv4/IPv6 first-fragment hits in FPGA IPF-table
  uint64_t ipFragTableFirstNoHit;   //!< Counts all IPv4/IPv6 first-fragment misses in FPGA IPF-table (first fragment not received)
  uint64_t ipFragTableMidHit;       //!< Counts all IPv4/IPv6 mid-fragment hits in FPGA IPF-table
  uint64_t ipFragTableMidNoHit;     //!< Counts all IPv4/IPv6 mid-fragment misses in FPGA IPF-table (middle fragment not received)
  uint64_t ipFragTableLastHit;      //!< Counts all IPv4/IPv6 last-fragment hits in FPGA IPF-table
  uint64_t ipFragTableLastNoHit;    //!< Counts all IPv4/IPv6 last-fragment misses in FPGA IPF-table (last fragment not received - e.g. before timeout)
};

/**
 * Statistics for each port
 */
struct NtPortStatistics_v3_s {
  /**
   * Valid indicators - these indicate which counters are supported by the port
   */
  struct NtPortStatisticsValid_v3_s {
    int RMON1;   //!< Is set if RMON1 counters are supported
    int extRMON; //!< Is set if extended RMON counters are supported
    int chksum;  //!< Is set if IP/TCP/UDP checksum counters are supported
    int decode;  //!< Is set if packet decode counters are supported
    int extDrop; //!< Is set if extended drop counters are supported
    int ipf;     //!< Is set if IP fragment table counters are supported
    int fec;     //!< Is set if FEC counters are supported
    int linkDetails;     //!< Is set if link details are supported
  } valid;

  struct NtRMON1Counters_s RMON1;          //!< RMON1 counters
  struct NtExtendedRMONCounters_v1_s extRMON; //!< Extended RMON counters
  struct NtCheckSumCounters_s chksum;      //!< Checksum error counters
  struct NtDecodeCounters_v1_s decode;        //!< Packets decoded by onboard packet decoder
  struct NtExtendedDropCounters_v1_s extDrop; //!< Extended drop counters
  struct NtIpFragTableCounters_s  ipf;     //!< IP fragment table counters (when using IPFMode)
  struct NtFecCounters_s  fec;     //!< FEC counters
  struct NtLinkDetails_s  linkDetails;     //!< Link details
};

/**
 * Statistics info group for port statistics
 */
struct NtStatGroupport_v3_s {
  struct NtPortStatistics_v3_s rx;   //!< Counters based on RX ports
  struct NtPortStatistics_v3_s tx;   //!< Counters based on TX ports
  uint64_t linkDownCounter;          //!< Counts number of link downs
  uint64_t ts;                       //!< Port counter sample time stamp. The format of the timestamp is specified by @ref tsType.
  enum NtTimestampType_e tsType;     //!< Time stamp type - For a description of the time stamp type see "DN-0384 3GD Time-Stamping and Time Synchronization User Guide"
};

/**
 * Statistics info group for stream statistics
 */
struct NtStatGroupStream_s {
  struct {
    struct NtColorStatistics_s forward;   //!< Number of forwarded packets/bytes
    struct NtColorStatistics_s flush;     //!< Number of flushed packets/bytes. Received while the stream-id is inactive
    struct NtColorStatistics_s drop;      //!< Number of dropped packets/bytes
  } streamid[256];                        //!< Statistic for an assigned stream-id.  // HB256: TODO:
  struct {
    struct NtColorStatistics_s forward;   //!< Number of forwarded packets/bytes
    struct NtColorStatistics_s flush;     //!< Number of flushed packets/bytes. Received while the stream-id is inactive
    struct NtColorStatistics_s drop;      //!< Number of dropped packets/bytes
  } Unassigned;                           //!< Statistic for traffic received in a host buffer before it has been assigned to a stream-id.
  uint64_t ts;                            //!< Stream statistic sample time stamp. The format of the timestamp is specified by the timestamp setting @ref TimestampFormat in the ini-file.
};

struct NtStatisticsQuery_v4_s {
  int poll; //!< Gets the current statistical information or waits for a new update
  int clear; //!< Clears the statistical information after it has been read. All statistics counters for the current stream will be cleared. Other statistics streams will remain untouched.
  /**
   * Data section holding the statistic counters
   */
  struct NtStatisticsQueryResult_v4_s {
    /**
     * Port specific statistics
     */
    struct NtStatisticsQueryPortResult_v4_s {
      uint8_t numPorts;                    //!< Number of ports in @ref aPorts
      uint8_t Reserved1[3];
//

      struct NtStatGroupport_v3_s aPorts[64];  //!< Array of port statistic structures in the system
//

    } port;
    /**
     * Adapter specific statistics
     */
    struct NtStatisticsQueryAdapterResult_v4_s {
      uint8_t numAdapters;                       //!< Number of adapters in @ref aAdapters
      uint8_t Reserved1[3];
      struct NtStatGroupAdapter_s aAdapters[10];  //!< Array of adapter statistic structures
    } adapter;
    /**
     * Stream specific statistics
     */
    struct NtStatGroupStream_s stream;
  } data;                                         //!< Structure for statistic results
};

struct NtStatisticsUsageData_v0_s {
  uint8_t streamid;                               //!< The streamid to get the usage data for.

  struct NtStatUsageData_s {
    uint32_t numHostBufferUsed;                   //!< Number of hostbuffers used by this stream ID
    struct NtStatHostBufferUsage_s {
      uint64_t deQueued;                          //!< Bytes available or in use by the streams
      uint64_t enQueued;                          //!< Bytes available to the host buffer handler
      uint64_t enQueuedAdapter;                   //!< Bytes currently in the adapter
                                                  //!
      uint8_t adapterNo;                          //!< The adapter owning the host buffer
      uint8_t numaNode;                           //!< The numanode on which the hostbuffer is located
      uint64_t hostBufferSize;                    //!< The host buffer size.
      uint32_t numStreams;                        //!< Number of streams using the host buffers

      struct NtStatOnboardBufferingUsage_s {
        uint64_t used;                            //!< Onboard adapter buffering
        uint64_t size;                            //!< Onboard adapter buffering size
        uint32_t crcErrors;                       //!< The number of CRC errors detected in the onboard buffer
      } onboardBuffering;

      struct NtStatUsage_s {
        struct NtStatUsageRx_s {
          uint64_t bytes;                         //!< Bytes received
          uint64_t frames;                        //!< Frames received
        } rx;
        struct NtStatUsageDrop_s {
          uint64_t bytes;                         //!< Bytes dropped
          uint64_t frames;                        //!< Frames dropped
        } drop;
        uint64_t ts;                              //!< Time stamp of gathered statistics
      } stat;
    } hb[256];
  } data;
};

/**
 * Flow matcher statistics version 0
 */
struct NtStatisticsFlowData_v0_s {
  int clear;             //!< Clears the statistical information after it has been read.
  uint8_t adapterNo;     //!< Adapter to receive the flow statistics from
  uint8_t reserved[3];
  uint64_t learnDone;   //!< Total number of flows programmed
  uint64_t learnFail;    //!< Number of flows that couldn't be programmed
  uint64_t learnIgnore;
  uint64_t unlearnDone;
  uint64_t unlearnIgnore;
  uint64_t automaticUnlearnDone;
  uint64_t automaticUnlearnIgnore;
  uint64_t automaticUnlearnFail;
  uint64_t timeoutUnlearnDone;
  uint64_t dmaWriteRecords;
  uint64_t dmaReadInfoRecords;
  uint64_t dmaReadStatRecords;
  uint64_t dmaDroppedInfoRecords;
  uint64_t dmaDroppedStatRecords;
};

/**
 * Flow matcher statistics version 1
 */
struct NtStatisticsFlowData_v1_s {
  int clear;             //!< Clears the statistical information after it has been read.
  uint8_t adapterNo;     //!< Adapter to receive the flow statistics from
  uint8_t reserved[3];
  uint64_t learnDone;   //!< Total number of flows programmed
  uint64_t learnFail;    //!< Number of flows that couldn't be programmed
  uint64_t learnIgnore;
  uint64_t unlearnDone;
  uint64_t unlearnIgnore;
  uint64_t automaticUnlearnDone;
  uint64_t automaticUnlearnIgnore;
  uint64_t automaticUnlearnFail;
  uint64_t timeoutUnlearnDone;
  uint64_t currentFlowCount;
  uint64_t dmaWriteRecords;
  uint64_t dmaReadInfoRecords;
  uint64_t dmaReadStatRecords;
  uint64_t dmaDroppedInfoRecords;
  uint64_t dmaDroppedStatRecords;
};

/**
 * Flow matcher statistics version 2
 */
struct NtStatisticsFlowData_v2_s {
  int clear;             //!< Clears the statistical information after it has been read.
  uint8_t adapterNo;     //!< Adapter to receive the flow statistics from
  uint8_t reserved[3];
  uint64_t learnDone;   //!< Total number of flows programmed
  uint64_t learnFail;    //!< Number of flows that couldn't be programmed
  uint64_t learnIgnore;
  uint64_t unlearnDone;
  uint64_t unlearnIgnore;
  uint64_t automaticUnlearnDone;
  uint64_t automaticUnlearnIgnore;
  uint64_t automaticUnlearnFail;
  uint64_t timeoutUnlearnDone;
  uint64_t relearnDone;
  uint64_t relearnIgnore;
  uint64_t probeDone;
  uint64_t probeIgnore;
  uint64_t currentFlowCount;
  uint64_t statusRecordDone;
  uint64_t infoRecordDone;
  uint64_t infoRecordSkip;
  uint64_t packetHitCount;
  uint64_t packetMissCount;
  uint64_t packetUnhandledCount;
  uint64_t packetDisabledCount;
  uint64_t cacheHitCount;
  uint64_t cacheMissCount;
  uint64_t cacheUnhandledCount;
  uint64_t cuckooStart;
  uint64_t cuckooMove;
  uint64_t dmaWriteRecords;
  uint64_t dmaReadInfoRecords;
  uint64_t dmaReadStatRecords;
  uint64_t dmaDroppedInfoRecords;
  uint64_t dmaDroppedStatRecords;
};

/* Include commands for backwards compatibility */
#if !defined(_NT_NTAPI_NO_COMPAT)
#include "stream_statistics_compat.h"
#endif

/**
 * Statistics
 */
typedef struct NtStatistics_s {
  enum NtStatisticsCmd_e cmd;             //!< Statistics command
  /**
   * Statistics data
   */
  union NtStatistics_u {
    struct NtStatisticsQuery_v4_s query_v4;          //!< The structure to use for @ref NtStatistics_s::cmd==NT_STATISTICS_READ_CMD_QUERY_V4
    struct NtStatisticsUsageData_v0_s usageData_v0;  //!< The structure to use for @ref NtStatistics_s::cmd==NT_STATISTICS_READ_CMD_USAGE_DATA
    struct NtStatisticsFlowData_v0_s flowData_v0;    //!< The structure to use for @ref NtStatistics_s::cmd==NT_STATISTICS_READ_CMD_FLOW_V0
    struct NtStatisticsFlowData_v1_s flowData_v1;    //!< The structure to use for @ref NtStatistics_s::cmd==NT_STATISTICS_READ_CMD_FLOW_V1
    struct NtStatisticsFlowData_v2_s flowData_v2;    //!< The structure to use for @ref NtStatistics_s::cmd==NT_STATISTICS_READ_CMD_FLOW_V2
#if !defined(_NT_NTAPI_NO_COMPAT)
    /* Commands for backwards compatibility */
    struct NtStatisticsQuery_v3_s query_v3;          //!< The structure to use for @ref NtStatistics_s::cmd==NT_STATISTICS_READ_CMD_QUERY_V3
    struct NtStatisticsQuery_v2_s query_v2;          //!< The structure to use for @ref NtStatistics_s::cmd==NT_STATISTICS_READ_CMD_QUERY_V2
    struct NtStatisticsQuery_v1_s query_v1;          //!< The structure to use for @ref NtStatistics_s::cmd==NT_STATISTICS_READ_CMD_QUERY_V1
    struct NtStatisticsQuery_s  query;               //!< The structure to use for @ref NtStatistics_s::cmd==NT_STATISTICS_READ_CMD_QUERY
#endif
  }u;                                                //!< Union for statistic structures
} NtStatistics_t;

/**
 * Statistics stream handle
 */
typedef struct NtStatStream_s* NtStatStream_t;

/**
 * @brief Opens a statistics stream
 *
 * This function is called to retrieve a handle to a statistics stream
 *
 * @param[out] hStatStream      Reference to a NtStatStream_t stream pointer
 * @param[in]  name             Stream friendly name - used in, for example, logging statements
 *
 * @retval  0    Success
 * @retval !=0   Error
 */
int NT_StatOpen(NtStatStream_t *hStatStream, const char *name);

/**
 * @brief Reads statistics
 *
 * Returns statistical information from the system
 *
 * @param[in]  hStatStream       NtStatStream_t handle
 * @param[in]  stat              Return buffer for statistics
 *
 * @retval  0                     Success
 * @retval  NT_STATUS_TIMEOUT     No data has been returned and a timeout has occured
 * @retval  NT_STATUS_TRYAGAIN    The resource is temporarily unavailable because of reconfiguration - call NT_StatRead() again
 * @retval !=0                    Error
 */
int NT_StatRead(NtStatStream_t hStatStream, NtStatistics_t *stat);

/**
 * @brief Closes a statistics stream
 *
 * This function is called to close a statistics stream
 *
 * @param[in] hStatStream        Reference to a NtStatStream_t stream pointer
 *
 * @retval  0    Success
 * @retval !=0   Error
 */
int NT_StatClose(NtStatStream_t hStatStream);

/** @} */

#endif // __STREAM_STATISTICS_H__