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stealthprocessing.go
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stealthprocessing.go
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package greynetanalysis
import (
"compress/gzip"
"context"
"encoding/json"
"log"
"os"
"sync"
"time"
"github.com/CAIDA/goiputils"
"github.com/google/gopacket"
"github.com/google/gopacket/layers"
"github.com/google/gopacket/pcapgo"
)
type ProbeDetails struct {
ProbeIP string
ProbeTime time.Time
Ttl uint8
}
type OnlineMap struct {
Hostmap map[string]map[string][]*ProbeDetails
Lock *sync.RWMutex
}
func Processpcap_annotation(pcapgzfile string) {
pcapf, err := os.Open(pcapgzfile)
if err != nil {
log.Fatal(err)
}
defer pcapf.Close()
preader, err := gzip.NewReader(pcapf)
if err != nil {
log.Fatal(err)
}
defer preader.Close()
pcapreader, err := pcapgo.NewReader(preader)
if err != nil {
log.Fatal(err)
}
var mmgeo, naqgeo goiputils.IPMetaProvider
var pfx2asn goiputils.IPHandler
var known *KnownScanners
annotations := make([]*PacketAnnotation, 0, 0)
ctx := context.Background()
cnt := 1
// var wg sync.WaitGroup
for {
data, ci, err := pcapreader.ZeroCopyReadPacketData()
if err == nil {
if cnt == 1 {
log.Println("initialzing")
pfx2asn = goiputils.NewIPHandlerbyDate(ci.Timestamp)
log.Println("completed loading pfx2asn")
mmgeo = goiputils.NewMaxmindCAIDA(ctx, ci.Timestamp, "en")
log.Println("completed loading maxmind")
naqgeo = goiputils.NewNetacqCAIDA(ctx, ci.Timestamp)
log.Println("completed loading netacq")
known = NewKnownScanners()
//known.AddSource("knownscanner.yaml", "other")
//known.AddSource("mcscanner.yaml", "other")
//known.AddSource("data/gn.yaml", "timed")
//known.AddSource("data/alienvault.csv", "csv")
}
pkt := gopacket.NewPacket(data, layers.LayerTypeEthernet, gopacket.NoCopy)
// wg.Add(1)
// go func(pkt gopacket.Packet, cnt int) {
annotations = append(annotations, AnnotatePacket(pkt, cnt, pfx2asn, mmgeo, naqgeo, known))
// fmt.Println(annotation)
// wg.Done()
// }(pkt, cnt)
cnt += 1
// fmt.Println("zmap:", greynetanalysis.IsZmap(pkt), "masscan:", greynetanalysis.IsMasscan(pkt), "mirai:", greynetanalysis.IsMirai(pkt))
} else {
break
}
}
annotationfilename := pcapgzfile[:len(pcapgzfile)-8] + ".json.gz"
// wg.Wait()
afile, err := os.Create(annotationfilename)
if err != nil {
log.Fatal(err)
}
defer afile.Close()
jinfo, err := json.Marshal(annotations)
if err != nil {
log.Println("json marshal error", pcapgzfile, err)
}
gzwrite := gzip.NewWriter(afile)
_, _ = gzwrite.Write(jinfo)
gzwrite.Flush()
gzwrite.Close()
}
func Processpcap_onlinemap(pcapgzfile string, onlinemap OnlineMap) {
pcapf, err := os.Open(pcapgzfile)
if err != nil {
log.Fatal(err)
}
defer pcapf.Close()
preader, err := gzip.NewReader(pcapf)
if err != nil {
log.Fatal(err)
}
defer preader.Close()
pcapreader, err := pcapgo.NewReader(preader)
if err != nil {
log.Fatal(err)
}
// var wg sync.WaitGroup
for {
data, ci, err := pcapreader.ZeroCopyReadPacketData()
if err == nil {
pkt := gopacket.NewPacket(data, layers.LayerTypeEthernet, gopacket.NoCopy)
srcip := pkt.NetworkLayer().NetworkFlow().Src().String()
dstip := pkt.NetworkLayer().NetworkFlow().Dst().String()
probetime := ci.Timestamp
ttl := pkt.NetworkLayer().(*layers.IPv4).TTL
//pkt.Metadata().Timestamp
//timetrunc := 5 * time.Minute
timetrunc := 24 * time.Hour
//timeform := "2006-01-02 03:04"
timeform := "2006-01-02"
onlinemap.Lock.Lock()
if _, srcexist := onlinemap.Hostmap[srcip]; !srcexist {
onlinemap.Hostmap[srcip] = make(map[string][]*ProbeDetails)
// onlinemap[srcip][probetime.Truncate(24*time.Hour).Format("2006-01-02")] = append(onlinemap[srcip][probetime.Truncate(24*time.Hour).Format("2006-01-02")], &ProbeDetails{ProbeIP: dstip, ProbeTime: probetime})
}
onlinemap.Hostmap[srcip][probetime.Truncate(timetrunc).Format(timeform)] = append(onlinemap.Hostmap[srcip][probetime.Truncate(timetrunc).Format(timeform)], &ProbeDetails{ProbeIP: dstip, ProbeTime: probetime, Ttl: ttl})
onlinemap.Lock.Unlock()
} else {
break
}
}
// wg.Wait()
}