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package processing
// DCSO FEVER
// Copyright (c) 2020, DCSO GmbH
import (
"encoding/json"
"fmt"
"math/rand"
"reflect"
"regexp"
"strconv"
"strings"
"sync"
"testing"
"time"
"github.com/DCSO/fever/types"
)
const (
numOfProfiledFlowItems = 10000
)
func makeFlowProfilerEvent() types.Entry {
e := types.Entry{
SrcIP: fmt.Sprintf("10.0.0.%d", rand.Intn(250)),
SrcPort: []int64{1, 2, 3, 4, 5}[rand.Intn(5)],
DestIP: fmt.Sprintf("10.0.0.%d", rand.Intn(250)),
DestPort: []int64{11, 12, 13, 14, 15}[rand.Intn(5)],
Timestamp: time.Now().Format(types.SuricataTimestampFormat),
EventType: "flow",
Proto: "TCP",
AppProto: []string{"foo", "bar", "baz"}[rand.Intn(3)],
BytesToClient: int64(rand.Intn(10000)),
BytesToServer: int64(rand.Intn(10000)),
PktsToClient: int64(rand.Intn(100)),
PktsToServer: int64(rand.Intn(100)),
}
jsonBytes, _ := json.Marshal(e)
e.JSONLine = string(jsonBytes)
return e
}
type flowProfilerTestSubmitter struct {
sync.Mutex
Values [][]byte
}
func (fpts *flowProfilerTestSubmitter) SubmitWithHeaders(rawData []byte, key string, contentType string, myHeaders map[string]string) {
fpts.Lock()
defer fpts.Unlock()
fpts.Values = append(fpts.Values, rawData)
}
func (fpts *flowProfilerTestSubmitter) Submit(rawData []byte, key string, contentType string) {
fpts.Lock()
defer fpts.Unlock()
fpts.Values = append(fpts.Values, rawData)
}
func (fpts *flowProfilerTestSubmitter) UseCompression() {
// pass
}
func (fpts *flowProfilerTestSubmitter) Finish() {
// pass
}
// TestFlowProfiler checks whether flow profiles are generated correctly.
// To do this, it consumes a set of example events with randomized event types
// and sizes, generates a reference set of statistics and then compares it to
// the values submitted to a test submitter which simply stores these values.
func TestFlowProfiler(t *testing.T) {
rand.Seed(time.Now().UTC().UnixNano())
myMap := make(map[string]ProtoProfile)
seenProfile := make(map[string]ProtoProfile)
feedWaitChan := make(chan bool)
s := &flowProfilerTestSubmitter{
Values: make([][]byte, 0),
}
f, err := MakeFlowProfiler(1*time.Second, s)
if err != nil {
t.Fatal(err)
}
f.Run()
for i := 0; i < numOfProfiledFlowItems; i++ {
ev := makeFlowProfilerEvent()
myProfile := myMap[ev.AppProto]
myProfile.BytesToClt += uint64(ev.BytesToClient)
myProfile.BytesToSrv += uint64(ev.BytesToServer)
myProfile.PacketsToClt += uint64(ev.PktsToClient)
myProfile.PacketsToSrv += uint64(ev.PktsToServer)
myMap[ev.AppProto] = myProfile
f.Consume(&ev)
}
go func() {
r := regexp.MustCompile(`proto=(?P<Proto>[^ ]+) flowbytestoclient=(?P<fbtc>[0-9]+),flowbytestoserver=(?P<fbts>[0-9]+),flowpktstoclient=(?P<fptc>[0-9]+),flowpktstoserver=(?P<fpts>[0-9]+)`)
for {
s.Lock()
found := 0
for _, v := range s.Values {
for _, proto := range []string{"foo", "bar", "baz"} {
if strings.Contains(string(v), fmt.Sprintf("proto=%s flowbytestoclient=0,flowbytestoserver=0,flowpktstoclient=0,flowpktstoserver=0", proto)) {
found++
}
}
}
s.Unlock()
if found == 3 {
break
}
time.Sleep(100 * time.Millisecond)
}
s.Lock()
for _, v := range s.Values {
sm := r.FindStringSubmatch(string(v))
if sm == nil {
continue
}
p := seenProfile[sm[1]]
intV, err := strconv.ParseUint(sm[2], 10, 64)
if err == nil {
p.BytesToClt += intV
}
intV, err = strconv.ParseUint(sm[3], 10, 64)
if err == nil {
p.BytesToSrv += intV
}
intV, err = strconv.ParseUint(sm[4], 10, 64)
if err == nil {
p.PacketsToClt += intV
}
intV, err = strconv.ParseUint(sm[5], 10, 64)
if err == nil {
p.PacketsToSrv += intV
}
seenProfile[sm[1]] = p
}
s.Unlock()
close(feedWaitChan)
}()
<-feedWaitChan
consumeWaitChan := make(chan bool)
f.Stop(consumeWaitChan)
<-consumeWaitChan
if !reflect.DeepEqual(myMap, seenProfile) {
t.Fatal("different result for test")
}
}
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