gopacket.example.go

package main

import (
	"github.com/bettercap/bettercap/log"

	"github.com/chifflier/nfqueue-go/nfqueue"
	"github.com/google/gopacket"
	"github.com/google/gopacket/layers"
)

func OnPacket(payload *nfqueue.Payload) int {
	packet := gopacket.NewPacket(payload.Data, layers.LayerTypeIPv4, gopacket.Default)
	log.Info("%s", packet.Dump())
	payload.SetVerdict(nfqueue.NF_ACCEPT)
	return 0
}
// Get packets from some source
for packet := range someSource {
  if app := packet.ApplicationLayer(); app != nil {
    if strings.Contains(string(app.Payload()), "magic string") {
      fmt.Println("Found magic string in a packet!")
    }
  }
	packet := gopacket.NewPacket(myPacketData, layers.LayerTypeEthernet, gopacket.Default)
if err := packet.ErrorLayer(); err != nil {
  fmt.Println("Error decoding some part of the packet:", err)
}