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/*
* This file is part of caronte (https://github.com/eciavatta/caronte).
* Copyright (c) 2020 Emiliano Ciavatta.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"context"
"fmt"
log "github.com/sirupsen/logrus"
"time"
)
type StatisticRecord struct {
RangeStart time.Time `json:"range_start" bson:"_id"`
RangeEnd time.Time `json:"range_end"`
ConnectionsPerService map[uint16]int64 `json:"connections_per_service" bson:"connections_per_service"`
ClientBytesPerService map[uint16]int64 `json:"client_bytes_per_service" bson:"client_bytes_per_service"`
ServerBytesPerService map[uint16]int64 `json:"server_bytes_per_service" bson:"server_bytes_per_service"`
TotalBytesPerService map[uint16]int64 `json:"total_bytes_per_service" bson:"total_bytes_per_service"`
DurationPerService map[uint16]int64 `json:"duration_per_service" bson:"duration_per_service"`
MatchedRules map[string]int64 `json:"matched_rules" bson:"matched_rules"`
}
type StatisticsFilter struct {
RangeFrom time.Time `form:"range_from"`
RangeTo time.Time `form:"range_to"`
Ports []uint16 `form:"ports"`
RulesIDs []string `form:"rules_ids"`
Metric string `form:"metric"`
}
type StatisticsController struct {
storage Storage
servicesMetrics []string
}
func NewStatisticsController(storage Storage) StatisticsController {
return StatisticsController{
storage: storage,
servicesMetrics: []string{"connections_per_service", "client_bytes_per_service",
"server_bytes_per_service", "total_bytes_per_service", "duration_per_service"},
}
}
func (sc *StatisticsController) GetStatistics(context context.Context, filter StatisticsFilter) []StatisticRecord {
var statisticRecords []StatisticRecord
query := sc.storage.Find(Statistics).Context(context).Sort("_id", true)
if !filter.RangeFrom.IsZero() {
query = query.Filter(OrderedDocument{{"_id", UnorderedDocument{"$lt": filter.RangeFrom}}})
}
if !filter.RangeTo.IsZero() {
query = query.Filter(OrderedDocument{{"_id", UnorderedDocument{"$gt": filter.RangeTo}}})
}
for _, port := range filter.Ports {
for _, metric := range sc.servicesMetrics {
if filter.Metric == "" || filter.Metric == metric {
query = query.Projection(OrderedDocument{{fmt.Sprintf("%s.%d", metric, port), 1}})
}
}
}
if filter.Metric != "" && len(filter.Ports) == 0 {
for _, metric := range sc.servicesMetrics {
if filter.Metric == metric {
query = query.Projection(OrderedDocument{{metric, 1}})
}
}
}
for _, ruleID := range filter.RulesIDs {
if filter.Metric == "" || filter.Metric == "matched_rules" {
query = query.Projection(OrderedDocument{{fmt.Sprintf("matched_rules.%s", ruleID), 1}})
}
}
if filter.Metric != "" && len(filter.RulesIDs) == 0 {
if filter.Metric == "matched_rules" {
query = query.Projection(OrderedDocument{{"matched_rules", 1}})
}
}
if err := query.All(&statisticRecords); err != nil {
log.WithError(err).WithField("filter", filter).Error("failed to retrieve statistics")
return []StatisticRecord{}
}
if statisticRecords == nil {
return []StatisticRecord{}
}
for i, _ := range statisticRecords {
statisticRecords[i].RangeEnd = statisticRecords[i].RangeStart.Add(time.Minute)
}
return statisticRecords
}
func (sc *StatisticsController) GetTotalStatistics(context context.Context, filter StatisticsFilter) StatisticRecord {
totalStats := StatisticRecord{}
statisticsPerMinute := sc.GetStatistics(context, filter)
if len(statisticsPerMinute) == 0 {
return totalStats
}
totalStats.RangeStart = statisticsPerMinute[0].RangeStart
totalStats.RangeEnd = statisticsPerMinute[len(statisticsPerMinute)-1].RangeEnd
if statisticsPerMinute[0].ConnectionsPerService != nil {
totalStats.ConnectionsPerService = make(map[uint16]int64)
}
if statisticsPerMinute[0].ClientBytesPerService != nil {
totalStats.ClientBytesPerService = make(map[uint16]int64)
}
if statisticsPerMinute[0].ServerBytesPerService != nil {
totalStats.ServerBytesPerService = make(map[uint16]int64)
}
if statisticsPerMinute[0].TotalBytesPerService != nil {
totalStats.TotalBytesPerService = make(map[uint16]int64)
}
if statisticsPerMinute[0].DurationPerService != nil {
totalStats.DurationPerService = make(map[uint16]int64)
}
if statisticsPerMinute[0].MatchedRules != nil {
totalStats.MatchedRules = make(map[string]int64)
}
aggregateServicesMap := func(accumulator map[uint16]int64, record map[uint16]int64) {
if accumulator == nil || record == nil {
return
}
for k, v := range record {
accumulator[k] += v
}
}
aggregateMatchedRulesMap := func(accumulator map[string]int64, record map[string]int64) {
if accumulator == nil || record == nil {
return
}
for k, v := range record {
accumulator[k] += v
}
}
for _, record := range statisticsPerMinute {
aggregateServicesMap(totalStats.ConnectionsPerService, record.ConnectionsPerService)
aggregateServicesMap(totalStats.ClientBytesPerService, record.ClientBytesPerService)
aggregateServicesMap(totalStats.ServerBytesPerService, record.ServerBytesPerService)
aggregateServicesMap(totalStats.TotalBytesPerService, record.TotalBytesPerService)
aggregateServicesMap(totalStats.DurationPerService, record.DurationPerService)
aggregateMatchedRulesMap(totalStats.MatchedRules, record.MatchedRules)
}
return totalStats
}
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