1 // Copyright 2012 Google, Inc. All rights reserved.
3 // Use of this source code is governed by a BSD-style license
4 // that can be found in the LICENSE file in the root of the source
7 // The pfdump binary implements a tcpdump-like command line tool with gopacket
8 // using pfring as a backend data collection mechanism.
14 "github.com/google/gopacket/dumpcommand"
15 "github.com/google/gopacket/examples/util"
16 "github.com/google/gopacket/pfring"
22 var iface = flag.String("i", "eth0", "Interface to read packets from")
23 var snaplen = flag.Int("s", 65536, "Snap length (number of bytes max to read per packet")
24 var cluster = flag.Int("cluster", -1, "If >= 0, sets the pfring cluster to this value")
25 var clustertype = flag.Int("clustertype", int(pfring.ClusterPerFlow), "Cluster type")
31 if ring, err = pfring.NewRing(*iface, uint32(*snaplen), pfring.FlagPromisc); err != nil {
32 log.Fatalln("pfring ring creation error:", err)
34 if len(flag.Args()) > 0 {
35 bpffilter := strings.Join(flag.Args(), " ")
36 fmt.Fprintf(os.Stderr, "Using BPF filter %q\n", bpffilter)
37 if err = ring.SetBPFFilter(bpffilter); err != nil {
38 log.Fatalln("BPF filter error:", err)
42 if err = ring.SetCluster(*cluster, pfring.ClusterType(*clustertype)); err != nil {
43 log.Fatalln("pfring SetCluster error:", err)
46 if err = ring.SetSocketMode(pfring.ReadOnly); err != nil {
47 log.Fatalln("pfring SetSocketMode error:", err)
48 } else if err = ring.Enable(); err != nil {
49 log.Fatalln("pfring Enable error:", err)