Biflow aggregator - unique_count aggregation function

Makefile.am

@@ -1,10 +1,10 @@
 ACLOCAL_AMFLAGS = -I m4
 
+# Biflow aggregator depends on logger and logreplay
 SUBDIRS= \
 aggregator \
 anonymizer \
 backscatter \
-biflow_aggregator \
 debug_sender \
 device_classifier \
 email_reporter \
@@ -31,6 +31,7 @@ topn \
 traffic_repeater \
 unirec2json \
 endiverter \
+biflow_aggregator \
 googletest_example
 
 EXTRA_DIST = AUTHORS COPYING ChangeLog INSTALL NEWS README.md nfreader \

biflow_aggregator/Makefile.am

@@ -5,3 +5,10 @@ biflow_aggregator_SOURCES=main.cpp fields.c fields.h configuration.cpp configura
                           rapidxml.hpp
 biflow_aggregator_LDADD=-lunirec -ltrap
 include ../aminclude.am
+
+TESTS = tests/test.sh
+
+EXTRA_DIST = tests/test.sh \
+	     tests/references \
+	     tests/inputs \
+	     tests/config.xml

biflow_aggregator/aggregator.cpp

@@ -184,6 +184,18 @@ int Field_template::assign_append() noexcept
     return 0;
 }
 
+template<typename T>
+int Field_template::assign_unique_count() noexcept
+{
+    typename_size = sizeof(T);
+    ag_fnc = unique_count<T>;
+    post_proc_fnc = Unique_count_data<T>::postprocessing;
+    init_fnc = Unique_count_data<T>::init;
+    deinit_fnc = Unique_count_data<T>::deinit;
+    ag_data_size = sizeof(Unique_count_data<T>);
+    return 0;
+}
+
 template<Field_type ag_type, typename T>
 int Field_template::assign_min_max() noexcept
 {
@@ -431,6 +443,23 @@ int Field_template::set_templates(const Field_type ag_type, const ur_field_type_
             std::cerr << "Only string and int, uint, float, double, mac, time, and IP array can be used to APPEND function." << std::endl;
             return 1;
         }
+    case UNIQUE_COUNT:
+        switch (ur_f_type) {
+        case UR_TYPE_UINT8:  return assign_unique_count<uint8_t>();
+        case UR_TYPE_INT8:   return assign_unique_count<int8_t>();
+        case UR_TYPE_UINT16: return assign_unique_count<uint16_t>();
+        case UR_TYPE_INT16:  return assign_unique_count<int16_t>();
+        case UR_TYPE_UINT32: return assign_unique_count<uint32_t>();
+        case UR_TYPE_INT32:  return assign_unique_count<int32_t>();
+        case UR_TYPE_UINT64: return assign_unique_count<uint64_t>();
+        case UR_TYPE_INT64:  return assign_unique_count<int64_t>();
+        case UR_TYPE_MAC:    return assign_unique_count<Mac_addr>();
+        case UR_TYPE_IP:     return assign_unique_count<uint128_t>();
+        case UR_TYPE_STRING:   return assign_unique_count<char>();
+        default:
+            std::cerr << "Only string and int, uint, float, double, mac, time, and IP array can be used to UNIQUE_COUNT function." << std::endl;
+            return 1;
+        }
     default:
         assert("Invalid case option.\n");
         return 1;
@@ -732,8 +761,10 @@ int Field_template::set_templates_dir(const ur_field_type_t ur_f_type, const ur_
     }
 }
 
-Field::Field(const Field_config cfg, const ur_field_id_t ur_fid, const ur_field_id_t ur_r_fid) :
-    ur_fid(ur_fid), ur_r_fid(ur_r_fid), ur_sort_key_id(0), ur_sort_key_type()
+Field::Field(const Field_config cfg, const ur_field_id_t ur_fid_in, const ur_field_id_t ur_r_fid_in,
+    const ur_field_id_t ur_fid_out, const ur_field_id_t ur_r_fid_out) 
+    : ur_fid(ur_fid_in), ur_r_fid(ur_r_fid_in), ur_fid_out(ur_fid_out), 
+    ur_r_fid_out(ur_r_fid_out), ur_sort_key_id(0), ur_sort_key_type()
 {
     ur_field_type_t ur_field_type = ur_get_type(ur_fid);
 
@@ -813,6 +844,11 @@ void Fields::init(uint8_t *memory)
             data.first.init(memory, &cfg);
             break;
         }
+        case UNIQUE_COUNT: {
+            struct Config_unique_count cfg = {data.first.limit};
+            data.first.init(memory, &cfg);
+            break;
+        }
         case SORTED_MERGE:
         case SORTED_MERGE_DIR: {
             struct Config_sorted_merge cfg = {data.first.limit, data.first.delimiter, data.first.sort_type};

biflow_aggregator/aggregator.h

@@ -40,6 +40,7 @@ enum Field_type {
     LAST,
     LAST_NON_EMPTY,
     APPEND,
+    UNIQUE_COUNT,
     SORTED_MERGE,
     SORTED_MERGE_DIR,
     INVALID_TYPE,
@@ -95,6 +96,9 @@ class Field_template {
     template<typename T>
     int assign_append() noexcept;
 
+    template<typename T>
+    int assign_unique_count() noexcept;
+
     template<Field_type ag_type, typename T>
     int assign_min_max() noexcept;
 
@@ -275,7 +279,7 @@ struct Field_config {
     char delimiter;
 
     /**
-     * @brief Max size of append and sortd merge data
+     * @brief Max size of data
      */
     std::size_t limit;
 
@@ -301,6 +305,16 @@ class Field : public Field_config, public Field_template {
      */
     ur_field_id_t ur_r_fid;
 
+    /**
+     * @brief ID of output unirec field
+     */
+    ur_field_id_t ur_fid_out;
+
+    /**
+     * @brief Reverse ID of output unirec field
+     */
+    ur_field_id_t ur_r_fid_out;
+
     /**
      * @brief ID of sort key unirec field
      * 
@@ -321,8 +335,11 @@ class Field : public Field_config, public Field_template {
      * @param cfg      Field configuration
      * @param ur_fid   Field ID
      * @param ur_r_fid Reverse field ID
+     * @param ur_fid_out Output field ID
+     * @param ur_r_fid_out Reverse output field ID
      */
-    Field(const Field_config cfg, const ur_field_id_t ur_fid, const ur_field_id_t ur_r_fid);
+    Field(const Field_config cfg, const ur_field_id_t ur_fid, const ur_field_id_t ur_r_fid,
+        const ur_field_id_t ur_fid_out, const ur_field_id_t ur_r_fid_out);
 
     /**
      * @brief Call field init function.

biflow_aggregator/aggregator_functions.h

@@ -15,6 +15,7 @@
 
 #include <iostream>
 #include <limits>
+#include <nemea-common/BloomFilter.hpp>
 
 #include <unirec/unirec.h>
 
@@ -174,6 +175,50 @@ struct Append_data : Config_append {
     }
 };
 
+/**
+ * @brief Configuration for unique count function 
+ */
+struct Config_unique_count {
+    std::size_t filter_size;
+};
+
+/**
+ * @brief Structure used to store data for unique count function.
+ */
+template<typename T>
+struct Unique_count_data : Config_unique_count {
+    bloom_filter filter;
+    std::size_t unique_count;
+
+    Unique_count_data(const bloom_parameters& parameters)
+    : filter(parameters)
+    {}
+
+    static inline void init(void* memory, const void* config)
+    {
+        const auto* config_unique_count = static_cast<const Config_unique_count*>(config);
+        bloom_parameters parameters;
+        parameters.projected_element_count = config_unique_count->filter_size;
+        parameters.false_positive_probability = 0.01;
+        parameters.compute_optimal_parameters();
+        new(memory) Unique_count_data<T>(parameters);
+    }
+
+    static inline void deinit(void* memory)
+    {
+        Unique_count_data<T>* unique_count_data = static_cast<Unique_count_data<T>*>(memory);
+        unique_count_data->unique_count = 0;
+        unique_count_data->~Unique_count_data<T>();
+    }
+
+    static inline const void* postprocessing(void* memory, std::size_t& elem_cnt) noexcept
+    {
+        Unique_count_data<T>* unique_count_data = static_cast<Unique_count_data<T>*>(memory);
+        elem_cnt = 1;
+        return static_cast<void*>(&unique_count_data->unique_count);
+    }
+};
+
 /**
  * @brief Configuration to sorted merge function
  */
@@ -519,6 +564,32 @@ inline void append(const void *src, void *dst) noexcept
             static_cast<const T*>(src_data->ptr_first) + src_data->cnt_elements);
 }
 
+/**
+ * @brief Inserts element from src pointer into bloom filter.
+ * @tparam T template type variable.
+ * @param [in] src pointer to source of new data.
+ * @param [in,out] dst pointer to already stored data which will be updated (modified).
+ */
+template<typename T>
+inline void unique_count(const void* src, void* dst) noexcept
+{
+    Unique_count_data<T>* unique_count_data = static_cast<Unique_count_data<T>*>(dst);
+
+    if (std::is_same<T, char>::value) {
+        const ur_array_data* src_data = (static_cast<const ur_array_data*>(src));
+        if (src_data->cnt_elements != 0 && !unique_count_data->filter.contains(
+            static_cast<const unsigned char*>(src_data->ptr_first), src_data->cnt_elements)) {
+            unique_count_data->filter.insert(static_cast<const unsigned char*>(src_data->ptr_first), src_data->cnt_elements);
+            unique_count_data->unique_count++;
+        }
+        return;
+    }
+    if (!unique_count_data->filter.contains(static_cast<const unsigned char*>(src), sizeof(T))) {
+        unique_count_data->filter.insert(static_cast<const unsigned char*>(src), sizeof(T));
+        unique_count_data->unique_count++;
+    }    
+}
+
 template <typename T, typename K>
 inline void sorted_merge(const void *src, void *dst) noexcept
 {

biflow_aggregator/configuration.cpp

@@ -71,6 +71,27 @@ bool Configuration::get_eof_termination() noexcept
     return _eof_terminate;
 }
 
+void Configuration::set_global_flush_configuration(const char *input)
+{
+    std::size_t mode_start_index; 
+    _global_flush_configuration.interval = std::stoul(input, &mode_start_index);
+    if (std::strcmp(input + mode_start_index, "a") == 0 ||
+        std::strcmp(input + mode_start_index, "absolute") == 0) {
+        _global_flush_configuration.type = Global_flush_configuration::Type::ABSOLUTE;
+    } else if (std::strcmp(input + mode_start_index, "r") == 0 ||
+               std::strcmp(input + mode_start_index, "relative") == 0 || 
+               std::strcmp(input + mode_start_index, "") == 0) {
+        _global_flush_configuration.type = Global_flush_configuration::Type::RELATIVE;
+    } else {
+        throw std::invalid_argument("Invalid flush timeout format. Expected: <interval> [a|absolute|r|relative|<empty for relative>].");
+    } 
+}
+
+Configuration::Global_flush_configuration Configuration::get_global_flush_configuration() noexcept
+{
+    return _global_flush_configuration;
+}
+
 void Configuration::print() noexcept
 {
     std::cout << "***** Configuration *****" << std::endl;
@@ -107,6 +128,7 @@ agg::Field_type Configuration::get_field_type(const char *input)
     if (!std::strcmp(input, "BITAND")) return agg::BIT_AND;
     if (!std::strcmp(input, "BITOR")) return agg::BIT_OR;
     if (!std::strcmp(input, "APPEND")) return agg::APPEND;
+    if (!std::strcmp(input, "UNIQUE_COUNT")) return agg::UNIQUE_COUNT;
     if (!std::strcmp(input, "SORTED_MERGE")) return agg::SORTED_MERGE;
     if (!std::strcmp(input, "SORTED_MERGE_DIR")) return agg::SORTED_MERGE_DIR;
     std::cerr << "Invalid type field. Given: " << input << ", Expected: KEY|SUM|MIN|MAX|AVG|FIRST|FIRST_NON_EMPTY|LAST|LAST_NON_EMPTY|BITAND|BITOR|APPEND|SORTED_MERGE|SORTED_MERGE_DIR." << std::endl;

biflow_aggregator/configuration.h

@@ -23,6 +23,35 @@
  * @brief Class thas holds module configuration
  */
 class Configuration {
+public:
+
+    /**
+     * @brief Global flush configuration
+     * 
+     * Flush interval is used to flush all records in flow cache to output interface once per given amount of seconds.
+     * If not set, no flush is performed.
+     */
+    struct Global_flush_configuration {
+        enum class Type {
+            ABSOLUTE,    ///< Flows must be flushed every interval seconds starting from epoch
+            RELATIVE,    ///< Flows must be flushed every interval seconds starting from module start
+        } type;
+        time_t interval = 0; ///< Interval in seconds 
+
+        /**
+         * @brief Check if flush interval is set
+         * 
+         * @return true  Flush interval is set
+         * @return false Flush interval is not set
+         */
+        [[nodiscard]] inline
+        bool is_set() const noexcept
+        {
+            return interval > 0;
+        }
+    };
+
+private:
 
     /**
      * @brief Configuration of fields from config file.
@@ -45,6 +74,14 @@ class Configuration {
      */
     time_t _t_passive;
 
+    /**
+     * @brief Periodic flush configuration
+     * 
+     * If set, module flush all records in flow cache to output interface once per given amount of seconds.
+     * If flush interval is set to 0, no flush is performed.
+     */
+    Global_flush_configuration _global_flush_configuration;
+
     /**
      * @brief active timeout
      * 
@@ -155,6 +192,20 @@ class Configuration {
      */
     time_t get_active_timeout() noexcept;
 
+    /**
+     * @brief Set the flush timeout
+     * 
+     * See _periodic_flush_configuration for more info.
+     * 
+     * @param input Timeout in text format.
+     */
+    void set_global_flush_configuration(const char *input);
+
+    /**
+     * @brief Get the flush timeout object
+     */
+    Global_flush_configuration get_global_flush_configuration() noexcept;
+
     /**
      * @brief Set the passive timeout
      *