func main() {
flag.Parse()
var handle *pcap.Handle
var err error
if *fname != "" {
if handle, err = pcap.OpenOffline(*fname); err != nil {
log.Fatalln("PCAP OpenOffline error:", err)
}
} else {
if handle, err = pcap.OpenLive(*iface, int32(*snaplen), true, time.Second); err != nil {
log.Fatalln("PCAP OpenLive error:", err)
}
if *tstype != "" {
if t, err := pcap.TimestampSourceFromString(*tstype); err != nil {
log.Fatalf("Supported timestamp types: %v", handle.SupportedTimestamps())
} else if err := handle.SetTimestampSource(t); err != nil {
log.Fatalf("Supported timestamp types: %v", handle.SupportedTimestamps())
}
}
if len(flag.Args()) > 0 {
bpffilter := strings.Join(flag.Args(), " ")
fmt.Fprintf(os.Stderr, "Using BPF filter %q\n", bpffilter)
if err = handle.SetBPFFilter(bpffilter); err != nil {
log.Fatalln("BPF filter error:", err)
}
}
}
dumpcommand.Run(handle)
}
