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e2e-tcp.go
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e2e-tcp.go
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package main
import (
"fmt"
"github.com/nextlinux/tracee/signatures/helpers"
"github.com/nextlinux/tracee/types/detect"
"github.com/nextlinux/tracee/types/protocol"
"github.com/nextlinux/tracee/types/trace"
)
type e2eTCP struct {
cb detect.SignatureHandler
}
func (sig *e2eTCP) Init(ctx detect.SignatureContext) error {
sig.cb = ctx.Callback
return nil
}
func (sig *e2eTCP) GetMetadata() (detect.SignatureMetadata, error) {
return detect.SignatureMetadata{
ID: "TCP",
Version: "0.1.0",
Name: "Network TCP Test",
Description: "Network E2E Tests: TCP",
Tags: []string{"e2e", "network"},
}, nil
}
func (sig *e2eTCP) GetSelectedEvents() ([]detect.SignatureEventSelector, error) {
return []detect.SignatureEventSelector{
{Source: "tracee", Name: "net_packet_tcp"},
}, nil
}
func (sig *e2eTCP) OnEvent(event protocol.Event) error {
eventObj, ok := event.Payload.(trace.Event)
if !ok {
return fmt.Errorf("failed to cast event's payload")
}
switch eventObj.EventName {
case "net_packet_tcp":
src, err := helpers.GetTraceeStringArgumentByName(eventObj, "src")
if err != nil {
return err
}
dst, err := helpers.GetTraceeStringArgumentByName(eventObj, "dst")
if err != nil {
return err
}
tcp, err := helpers.GetProtoTCPByName(eventObj, "proto_tcp")
if err != nil {
return err
}
// check values for detection
if src != "172.16.17.1" || dst != "172.16.17.2" {
return nil
}
if tcp.SrcPort != 8090 ||
tcp.ACK != 1 ||
tcp.RST != 0 ||
tcp.URG != 0 ||
tcp.SYN != 0 ||
tcp.FIN != 0 {
return nil
}
m, _ := sig.GetMetadata()
sig.cb(detect.Finding{
SigMetadata: m,
Event: event,
Data: map[string]interface{}{},
})
}
return nil
}
func (sig *e2eTCP) OnSignal(s detect.Signal) error {
return nil
}
func (sig *e2eTCP) Close() {}