forked from aquasecurity/libbpfgo
/
main.go
78 lines (64 loc) · 1.23 KB
/
main.go
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package main
import "C"
import (
"encoding/binary"
"fmt"
"os"
"os/exec"
bpf "github.com/aquasecurity/libbpfgo"
)
const (
deviceName = "lo"
)
func main() {
bpfModule, err := bpf.NewModuleFromFile("main.bpf.o")
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(-1)
}
defer bpfModule.Close()
err = bpfModule.BPFLoadObject()
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(-1)
}
xdpProg, err := bpfModule.GetProgram("target")
if xdpProg == nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(-1)
}
_, err = xdpProg.AttachXDP(deviceName)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(-1)
}
eventsChannel := make(chan []byte)
rb, err := bpfModule.InitRingBuf("events", eventsChannel)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(-1)
}
rb.Start()
numberOfEventsReceived := 0
go func() {
_, err := exec.Command("ping", "localhost", "-c 10").Output()
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(-1)
}
}()
recvLoop:
for {
b := <-eventsChannel
if binary.LittleEndian.Uint32(b) != 2021 {
fmt.Fprintf(os.Stderr, "invalid data retrieved\n")
os.Exit(-1)
}
numberOfEventsReceived++
if numberOfEventsReceived > 5 {
break recvLoop
}
}
rb.Stop()
rb.Close()
}