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main.go
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main.go
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package main
import (
"bytes"
"log"
"os"
gp "github.com/google/gopacket"
"github.com/google/gopacket/layers"
pcap "github.com/google/gopacket/pcapgo"
)
func main() {
f, err := os.Create("somefile.pcapng")
if err != nil {
log.Fatalf("Create: %v", err)
}
defer f.Close()
// TODO: Change to 225 w/ SOF/EOF
w, err := pcap.NewNgWriter(f, layers.LinkType(224))
if err != nil {
log.Fatalf("NewNgWriter: %v", err)
}
defer w.Flush()
for _, path := range os.Args[1:] {
fr, err := os.Open(path)
defer fr.Close()
if err != nil {
log.Fatalf("Open: %v", err)
}
buf := new(bytes.Buffer)
if _, err := buf.ReadFrom(fr); err != nil {
log.Fatalf("Read: %v", err)
}
ci := gp.CaptureInfo{
CaptureLength: buf.Len(),
Length: buf.Len(),
}
if err := w.WritePacket(ci, buf.Bytes()); err != nil {
log.Fatalf("WritePacket: %v", err)
}
}
}