func runTestZone(){
fmt.Println("We're in test zone")
if handle, err := pcap.OpenOffline("/home/jnankin/Desktop/test.pcap"); err != nil {
panic(err)
} else {
packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
for packet := range packetSource.Packets() {
if packet.Layer(layers.LayerTypeTCP) != nil {
appLayer := packet.ApplicationLayer()
fmt.Println("APP LAYER: \n" + string(appLayer.Payload()) + "\n\n");
sipMessage := sipparser.ParseMsg(string(appLayer.Payload()))
fmt.Println("SIP BODY: \n" + sipMessage.Body + "\n\n");
fmt.Println("Content length: \n" + sipMessage.ContentLength + "\n\n");
/*SIP PDU detection: 1st Line contains SIP/2.0
foreach line, if it's a content length, set it.
add each line to the current sip message
if the line is blank:
if I have a content length:
add content length more bytes from the message to the current sip message
add the current message to the list of messages found
if there are still messages in the buffer, the packet is fragmented and we need more messages
*/
}
}
}
}
func NewPcapFileSniffer(filename string) (*PcapHandle, error) {
pcapFileHandle, err := pcap.OpenOffline(filename)
pcapHandle := PcapHandle{
handle: pcapFileHandle,
}
return &pcapHandle, err
}
func (c *cmdBenchmark) ParsingFinished() (err error) {
if !c.shouldExecute {
return
}
handle, err := pcap.OpenOffline(c.InputFileName)
errs.CheckE(err)
defer handle.Close()
bo := packet.NewBufferedObtainer(handle)
var pp packet.Processor
if c.ProcCopy {
pp = processor.NewCopyingProcessor()
} else {
pp = processor.NewReusingProcessor()
}
pp.SetObtainer(bo)
var totalDuration time.Duration
for i := 0; i < c.Iter; i++ {
bo.Reset()
start := time.Now()
pp.ProcessAll()
duration := time.Since(start)
totalDuration += duration
}
timePerPacket := totalDuration / time.Duration(c.Iter*bo.Packets())
fmt.Printf("total duration: %s, time/pkt: %s\n", totalDuration, timePerPacket)
return
}
func TestTCP(t *testing.T) {
handle, err := pcap.OpenOffline("tcptest.pcap")
if err != nil {
panic(err)
}
packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
defer handle.Close()
tcpPack := make(chan gopacket.Packet, 10)
nomalPack := make(chan gopacket.Packet, 5)
for input_pack := range packetSource.Packets() { // send tcp package for channel
tcpLayer := input_pack.Layer(layers.LayerTypeTCP)
if tcpLayer != nil {
tcpPack <- input_pack
// send packet to tcp ASSEMBLER
}
}
streamFactory := &DNSStreamFactory{normal: nomalPack}
streamPool := tcpassembly.NewStreamPool(streamFactory)
assembler := tcpassembly.NewAssembler(streamPool)
go tcpAssemble(tcpPack, assembler)
pack := <-nomalPack
udpLayer := pack.Layer(layers.LayerTypeUDP)
if udpLayer == nil {
t.Errorf("can not fine udp Layer in result")
}
dns_message := new(dns.Msg)
err = dns_message.Unpack(udpLayer.LayerPayload())
if err != nil {
t.Errorf("can not parse dns message")
}
fmt.Printf(dns_message.String())
}
func packetSource() *gopacket.PacketSource {
if *inputPcap != "" {
handle, err := pcap.OpenOffline(*inputPcap)
if err != nil {
log.Fatalln(err)
}
fmt.Printf("open pcap file \"%s\"\n", *inputPcap)
return gopacket.NewPacketSource(handle, handle.LinkType())
}
if *device == "" {
*device = autoSelectDev()
if *device == "" {
log.Fatalln("no device to capture")
}
}
handle, err := pcap.OpenLive(*device, 1024*1024, true, pcap.BlockForever)
if err != nil {
log.Fatalln(err)
}
if *bpf != "" {
if err = handle.SetBPFFilter(*bpf); err != nil {
log.Fatalln("Failed to set BPF filter:", err)
}
}
fmt.Printf("open live on device \"%s\", bpf \"%s\", serves on port %d\n", *device, *bpf, *bindingPort)
return gopacket.NewPacketSource(handle, handle.LinkType())
}
func main() {
flag.Parse()
pcap, err := pcap.OpenOffline(*pcapFile)
if err != nil {
fmt.Fprintln(os.Stderr, "error opening pcap file:", err)
os.Exit(1)
}
h := mongocaputils.NewPacketHandler(pcap)
m := mongocaputils.NewMongoOpStream(*packetBufSize)
ch := make(chan struct{})
go func() {
defer close(ch)
for op := range m.Ops {
if _, ok := op.Op.(*mongoproto.OpUnknown); !ok {
fmt.Printf("%f %v\n", float64(op.Seen.Sub(m.FirstSeen))/10e8, op)
}
}
}()
if err := h.Handle(m, -1); err != nil {
fmt.Fprintln(os.Stderr, "mongocapcat: error handling packet stream:", err)
}
<-ch
}
func TestNgnet(t *testing.T) {
eventChan := make(chan interface{}, 1024)
f := NewHttpStreamFactory(eventChan)
pool := tcpassembly.NewStreamPool(f)
assembler := tcpassembly.NewAssembler(pool)
packetCount := 0
fmt.Println("Run")
if handle, err := pcap.OpenOffline("dump.pcapng"); err != nil {
panic(err)
} else {
packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
for packet := range packetSource.Packets() {
net_layer := packet.NetworkLayer()
trans_layer := packet.TransportLayer()
if net_layer == nil {
continue
}
if trans_layer == nil {
continue
}
packetCount++
tcp, _ := trans_layer.(*layers.TCP)
assembler.AssembleWithTimestamp(net_layer.NetworkFlow(), tcp, packet.Metadata().CaptureInfo.Timestamp)
}
}
assembler.FlushAll()
f.Wait()
fmt.Println("packet:", packetCount, "http:", len(eventChan))
}
func ProcessPackets(pcapFile string,
mongodHost string,
mongodPort string) {
if handle, err := pcap.OpenOffline(pcapFile); err != nil {
panic(err)
} else {
var connectionWaitGroup sync.WaitGroup
packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
firstPacket := <-packetSource.Packets()
packetMinTimestamp = GetPacketTime(firstPacket)
mapHostConnection = make(map[string]*MongoConnection)
SendPacket(firstPacket,
&connectionWaitGroup,
mongodHost,
mongodPort)
for packet := range packetSource.Packets() {
SendPacket(packet,
&connectionWaitGroup,
mongodHost,
mongodPort)
}
for _, mConnection := range mapHostConnection {
mConnection.EOF()
}
connectionWaitGroup.Wait()
}
}
//init re-initializes a snifer for uses
func (s *Snifer) init() error {
var handle *pcap.Handle
var err error
if s.conf.Offline {
handle, err = pcap.OpenOffline(s.source)
checkError(err, fmt.Sprintf("Create offline handle %s", s.source))
} else {
handle, err = pcap.OpenLive(s.source, s.conf.MaxPacket, s.conf.Promod, s.conf.Timeout)
checkError(err, fmt.Sprintf("Create Live handle %s", s.source))
if err == nil {
err = handle.SetBPFFilter(s.conf.Filter)
checkError(err, fmt.Sprintf("Setting BPFFilter %s: %s", s.source, s.conf.Filter))
}
}
if err != nil {
checkError(err, fmt.Sprintf("Creating Snifer for %s", s.source))
return err
}
s.handle = handle
log.Printf("Snifer: Handler created and ready!")
return nil
}
func pcapInfo(filename string) (start time.Time, end time.Time, packets int, size int) {
handleRead, err := pcap.OpenOffline(*fname)
if err != nil {
log.Fatal("PCAP OpenOffline error (handle to read packet):", err)
}
var previousTs time.Time
var deltaTotal time.Duration
for {
data, ci, err := handleRead.ReadPacketData()
if err != nil && err != io.EOF {
log.Fatal(err)
} else if err == io.EOF {
break
} else {
if start.IsZero() {
start = ci.Timestamp
}
end = ci.Timestamp
packets++
size += len(data)
if previousTs.IsZero() {
previousTs = ci.Timestamp
} else {
deltaTotal += ci.Timestamp.Sub(previousTs)
previousTs = ci.Timestamp
}
}
}
fmt.Printf("Avg packet rate %d/s\n", packets/int(deltaTotal.Seconds()))
return start, end, packets, size
}
func main() {
flag.Parse()
var handle *pcap.Handle
var err error
if *fname != "" {
log.Printf("Reading from pcap dump %q", *fname)
handle, err = pcap.OpenOffline(*fname)
} else {
log.Printf("Starting capture on interface %q", *iface)
handle, err = pcap.OpenLive(*iface, int32(*snaplen), true, pcap.BlockForever)
}
if err != nil {
log.Fatal(err)
}
if err := handle.SetBPFFilter(*filter); err != nil {
log.Fatal(err)
}
packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
for packet := range packetSource.Packets() {
if packet == nil {
return
}
if udpLayer := packet.Layer(layers.LayerTypeUDP); udpLayer != nil {
udp, _ := udpLayer.(*layers.UDP)
fwdSIPPacket(udp.BaseLayer.Payload)
}
}
}
func main() {
if len(os.Args) != 2 {
fmt.Printf("Usage: %s pcap\n", os.Args[0])
os.Exit(0)
}
input, output := os.Args[1], "out.ts"
handle, err := pcap.OpenOffline(input)
if err != nil {
log.Fatal(err)
}
defer handle.Close()
f, err := os.Create(output)
if err != nil {
log.Fatal(err)
}
defer f.Close()
source := gopacket.NewPacketSource(handle, handle.LinkType())
for packet := range source.Packets() {
appLayer := packet.ApplicationLayer()
if appLayer != nil {
payload := appLayer.Payload()
if len(payload) == UDPSize {
f.Write(payload)
} else if len(payload) == HRTPSize {
offset := HRTPSize - UDPSize
f.Write(payload[offset:HRTPSize])
}
}
}
}
func getOpstream(cfg OpStreamSettings) (*packetHandlerContext, error) {
if cfg.PacketBufSize < 1 {
return nil, fmt.Errorf("invalid packet buffer size")
}
var pcapHandle *pcap.Handle
var err error
if len(cfg.PcapFile) > 0 {
pcapHandle, err = pcap.OpenOffline(cfg.PcapFile)
if err != nil {
return nil, fmt.Errorf("error opening pcap file: %v", err)
}
} else if len(cfg.NetworkInterface) > 0 {
pcapHandle, err = pcap.OpenLive(cfg.NetworkInterface, 32*1024*1024, false, pcap.BlockForever)
if err != nil {
return nil, fmt.Errorf("error listening to network interface: %v", err)
}
} else {
return nil, fmt.Errorf("must specify either a pcap file or network interface to record from")
}
if len(cfg.Expression) > 0 {
err = pcapHandle.SetBPFFilter(cfg.Expression)
if err != nil {
return nil, fmt.Errorf("error setting packet filter expression: %v", err)
}
}
h := NewPacketHandler(pcapHandle)
h.Verbose = userInfoLogger.isInVerbosity(DebugLow)
toolDebugLogger.Logvf(Info, "Created packet buffer size %d", cfg.PacketBufSize)
m := NewMongoOpStream(cfg.PacketBufSize)
return &packetHandlerContext{h, m, pcapHandle}, nil
}
func openFile(pcapFile string) *pcap.Handle {
handle, err := pcap.OpenOffline(pcapFile)
if err != nil {
log.Fatal("Open file", pcapFile, "error:", err)
}
return handle
}
func main() {
flag.Parse()
pcap, err := pcap.OpenOffline(*pcapFile)
if err != nil {
fmt.Fprintln(os.Stderr, "error opening pcap file:", err)
os.Exit(1)
}
h := mongocaputils.NewPacketHandler(pcap)
m := mongocaputils.NewMongoOpStream(*packetBufSize)
ch := make(chan struct{})
go func() {
defer close(ch)
for op := range m.Ops {
bsonBytes, err := bson.Marshal(op)
if err != nil {
fmt.Fprintln(os.Stderr, "error marshaling message:", err)
os.Exit(1)
}
_, err = os.Stdout.Write(bsonBytes)
if err != nil {
fmt.Fprintln(os.Stderr, "error writing message:", err)
os.Exit(1)
}
}
}()
if err := h.Handle(m, -1); err != nil {
fmt.Fprintln(os.Stderr, "mongorecord: error handling packet stream:", err)
}
<-ch
}
func main() {
defer util.Run()()
var handle *pcap.Handle
var err error
// Set up pcap packet capture
if *fname != "" {
log.Printf("Reading from pcap dump %q", *fname)
handle, err = pcap.OpenOffline(*fname)
} else {
log.Fatalln("Error: pcap file name is required!")
// log.Printf("Starting capture on interface %q", *iface)
// handle, err = pcap.OpenLive(*iface, int32(*snaplen), true, pcap.BlockForever)
}
if err != nil {
log.Fatal(err)
}
if err := handle.SetBPFFilter(*filter); err != nil {
log.Fatal(err)
}
// Set up assembly
streamFactory := &httpStreamFactory{}
streamPool := tcpassembly.NewStreamPool(streamFactory)
assembler := tcpassembly.NewAssembler(streamPool)
log.Println("reading in packets")
// Read in packets, pass to assembler.
packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
packets := packetSource.Packets()
ticker := time.Tick(time.Minute)
for {
select {
case packet := <-packets:
// A nil packet indicates the end of a pcap file.
if packet == nil {
return
}
if *logAllPackets {
log.Println("\npacket:")
// log.Println(packet)
}
if packet.NetworkLayer() == nil || packet.TransportLayer() == nil || packet.TransportLayer().LayerType() != layers.LayerTypeTCP {
log.Println("Unusable packet")
continue
}
tcp := packet.TransportLayer().(*layers.TCP)
log.Printf("\n.......................................................\n")
log.Printf("packet:\n")
log.Printf("packet.Metadata().Timestamp=%T=%v=%v:\n%#v\n", packet.Metadata().Timestamp, packet.Metadata().Timestamp, packet.Metadata().Timestamp.UTC(), packet.Metadata().Timestamp)
assembler.AssembleWithTimestamp(packet.NetworkLayer().NetworkFlow(), tcp, packet.Metadata().Timestamp)
case <-ticker:
// Every minute, flush connections that haven't seen activity in the past 2 minutes.
assembler.FlushOlderThan(time.Now().Add(time.Minute * -2))
}
}
}
func (t *Listener) readPcapFile() {
if handle, err := pcap.OpenOffline(t.addr); err != nil {
log.Fatal(err)
} else {
t.readyCh <- true
packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
for {
packet, err := packetSource.NextPacket()
if err == io.EOF {
break
} else if err != nil {
log.Println("Error:", err)
continue
}
var addr, data []byte
if tcpLayer := packet.Layer(layers.LayerTypeTCP); tcpLayer != nil {
tcp, _ := tcpLayer.(*layers.TCP)
data = append(tcp.LayerContents(), tcp.LayerPayload()...)
if tcp.SrcPort >= 32768 && tcp.SrcPort <= 61000 {
copy(data[0:2], []byte{0, 0})
copy(data[2:4], []byte{0, 1})
} else {
copy(data[0:2], []byte{0, 1})
copy(data[2:4], []byte{0, 0})
}
} else {
continue
}
if ipLayer := packet.Layer(layers.LayerTypeIPv4); ipLayer != nil {
ip, _ := ipLayer.(*layers.IPv4)
addr = ip.SrcIP
} else if ipLayer = packet.Layer(layers.LayerTypeIPv6); ipLayer != nil {
ip, _ := ipLayer.(*layers.IPv6)
addr = ip.SrcIP
} else {
// log.Println("Can't find IP layer", packet)
continue
}
dataOffset := (data[12] & 0xF0) >> 4
isFIN := data[13]&0x01 != 0
// We need only packets with data inside
// Check that the buffer is larger than the size of the TCP header
if len(data) <= int(dataOffset*4) && !isFIN {
continue
}
t.packetsChan <- t.buildPacket(addr, data, packet.Metadata().Timestamp)
}
}
}
func getHandle(which string) *pcap.Handle {
var pcapFile string = "data/" + which + ".pcap"
handle, err := pcap.OpenOffline(pcapFile)
if err != nil {
return nil
}
return handle
}
//TODO obviously not a main function, rename it to the caller
func parseFile(fileName string) list.List {
connections := list.List{}
if handle, err := pcap.OpenOffline(fileName); err != nil {
panic(err)
} else {
packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
processPacketsChan(packetSource.Packets(), &connections)
}
return connections
}
/*
Utility functions
*/
func getPacketData(which string) *gopacket.PacketSource {
var pcapFile string = "data/" + which + ".pcap"
handle, err := pcap.OpenOffline(pcapFile)
if err != nil {
return nil
}
return gopacket.NewPacketSource(handle, handle.LinkType())
}
func main() {
runtime.GOMAXPROCS(runtime.NumCPU())
flag.Parse()
logger := log.New(os.Stderr, "ERROR: ", log.Ldate|log.Ltime|log.Lshortfile)
pcap, err := pcap.OpenOffline(*pcapFile)
if err != nil {
fmt.Fprintln(os.Stderr, "error opening pcap file:", err)
os.Exit(1)
}
h := mongocaputils.NewPacketHandler(pcap)
m := mongocaputils.NewMongoOpStream(*packetBufSize)
ch := make(chan struct{})
go func() {
defer close(ch)
for op := range m.Ops {
// TODO: add other op types
if opQuery, ok := op.Op.(*mongoproto.OpQuery); ok {
fbOp := map[string]interface{}{}
fbOp["ns"] = opQuery.FullCollectionName
fbOp["ntoskip"] = opQuery.NumberToSkip
fbOp["ntoreturn"] = opQuery.NumberToReturn
fbOp["ts"] = json.Date(op.Seen.Unix())
query, err := rawBSONToJSON(opQuery.Query)
if err != nil {
logger.Println(err)
if !*continueOnError {
os.Exit(1)
}
}
if strings.HasSuffix(opQuery.FullCollectionName, ".$cmd") {
fbOp["op"] = "command"
fbOp["command"] = query
} else {
fbOp["op"] = "query"
fbOp["query"] = query
}
fbOpStr, err := json.Marshal(fbOp)
if err != nil {
logger.Println(err)
if !*continueOnError {
os.Exit(1)
}
}
fmt.Println(string(fbOpStr))
}
}
}()
if err := h.Handle(m, -1); err != nil {
fmt.Fprintln(os.Stderr, "pcap_converter: error handling packet stream:", err)
}
<-ch
}
func main() {
handle, err := pcap.OpenOffline("capture/http.pcap")
if err != nil {
panic(err)
}
packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
for packet := range packetSource.Packets() {
handlePacket(packet) // Do something with a packet here.
}
}
func (s *EfhSim) AnalyzeInput() (err error) {
defer errs.PassE(&err)
handle, err := pcap.OpenOffline(s.inputFileName)
errs.CheckE(err)
defer handle.Close()
pp := processor.NewProcessor()
pp.LimitPacketNumber(s.inputPacketLimit)
pp.SetObtainer(handle)
pp.SetHandler(s)
errs.CheckE(pp.ProcessAll())
return
}
func (t *Listener) readPcapFile() {
if handle, err := pcap.OpenOffline(t.addr); err != nil {
log.Fatal(err)
} else {
t.readyCh <- true
packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
for {
packet, err := packetSource.NextPacket()
if err == io.EOF {
break
} else if err != nil {
log.Println("Error:", err)
continue
}
var addr, data []byte
if tcpLayer := packet.Layer(layers.LayerTypeTCP); tcpLayer != nil {
tcp, _ := tcpLayer.(*layers.TCP)
data = append(tcp.LayerContents(), tcp.LayerPayload()...)
copy(data[2:4], []byte{0, 1})
} else {
continue
}
if ipLayer := packet.Layer(layers.LayerTypeIPv4); ipLayer != nil {
ip, _ := ipLayer.(*layers.IPv4)
addr = ip.SrcIP
} else if ipLayer = packet.Layer(layers.LayerTypeIPv6); ipLayer != nil {
ip, _ := ipLayer.(*layers.IPv6)
addr = ip.SrcIP
} else {
// log.Println("Can't find IP layer", packet)
continue
}
dataOffset := (data[12] & 0xF0) >> 4
// We need only packets with data inside
// Check that the buffer is larger than the size of the TCP header
if len(data) <= int(dataOffset*4) {
continue
}
newBuf := make([]byte, len(data)+16)
copy(newBuf[:16], addr)
copy(newBuf[16:], data)
t.packetsChan <- newBuf
}
}
}
func main() {
defer util.Run()()
var handle *pcap.Handle
var err error
signal.Notify(sigs, syscall.SIGHUP)
go startWebServer()
go sighandler()
flag.Parse()
go printDebugInfo()
if fname != "" {
if handle, err = pcap.OpenOffline(fname); err != nil {
log.Fatal("PCAP OpenOffline error:", err)
}
} else {
// This is a little complicated because we want to allow all possible options
// for creating the packet capture handle... instead of all this you can
// just call pcap.OpenLive if you want a simple handle.
inactive, err := pcap.NewInactiveHandle(iface)
if err != nil {
log.Fatal("could not create: %v", err)
}
defer inactive.CleanUp()
if err = inactive.SetSnapLen(snaplen); err != nil {
log.Fatal("could not set snap length: %v", err)
} else if err = inactive.SetPromisc(true); err != nil {
log.Fatal("could not set promisc mode: %v", err)
} else if err = inactive.SetTimeout(time.Second); err != nil {
log.Fatal("could not set timeout: %v", err)
}
if tstype != "" {
if t, err := pcap.TimestampSourceFromString(tstype); err != nil {
log.Fatalf("Supported timestamp types: %v", inactive.SupportedTimestamps())
} else if err := inactive.SetTimestampSource(t); err != nil {
log.Fatalf("Supported timestamp types: %v", inactive.SupportedTimestamps())
}
}
if handle, err = inactive.Activate(); err != nil {
log.Fatal("PCAP Activate error:", err)
}
defer handle.Close()
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.Fatal("BPF filter error:", err)
}
}
}
for {
process(handle)
}
}
func main() {
flag.Parse()
args := flag.Args()
if flag.NArg() != 1 {
usage()
}
log.Printf("layers: processing file '%s'\n", args[0])
if len(args[0]) <= 0 {
log.Printf("layers: invalid args[0] in: '-r %s'\n", args[0])
}
handle, err := pcap.OpenOffline(args[0])
if err != nil {
log.Fatal(err)
}
defer handle.Close()
packets := []gopacket.Packet{}
packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
for packet := range packetSource.Packets() {
packets = append(packets, packet)
}
for i, p := range packets {
// see "type PacketMetadata struct" and "type CaptureInfo struct"
// in github.com/google/gopacket/packet.go:
log.Printf("\n%v. packet=%v:\n", i+1, p.Metadata().CaptureInfo.Timestamp.UTC())
// log.Printf("\n%v. packet:\n%#v\n", i+1, p)
// log.Printf("file.expectedLayers=%T=%#v\n", file.expectedLayers, file.expectedLayers)
// see issue: https://github.com/google/gopacket/issues/175
// log.Printf(p.Dump()) // fails in Go 1.6, see https://golang.org/doc/go1.6#reflect
// log.Printf(p.String()) // fails in Go 1.6, see https://golang.org/doc/go1.6#reflect
// Iterate over all layers, printing out each layer type
log.Println("All packet layers:")
for _, layer := range p.Layers() {
log.Println("- ", layer.LayerType())
}
// for _, layertype := range file.expectedLayers {
// if p.Layer(layertype) == nil {
// log.Fatal("Packet", i, "has no layer type\n%s", layertype, p.Dump())
// }
// }
} // for range packets
log.Printf("packets count=%v\n", len(packets))
}
func read_pcap_file(pcap_file string) {
fmt.Printf("\t-- Reading PCAP file: %s --", pcap_file)
if handle, err := pcap.OpenOffline(pcap_file); err != nil {
fmt.Println("Error opening file: " + pcap_file + "\n")
panic(err)
} else {
packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
for packet := range packetSource.Packets() {
process_gopacket(packet)
// fmt.Println(packet.Metadata().CaptureInfo)
}
}
}
func main() {
// Open file instead of device
handle, err = pcap.OpenOffline(pcapFile)
if err != nil {
log.Fatal(err)
}
defer handle.Close()
// Loop through packets in file
packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
for packet := range packetSource.Packets() {
fmt.Println(packet)
}
}
func main() {
// Open pcap file
handle, err = pcap.OpenOffline("test.pcap")
if err != nil {
log.Fatal(err)
}
defer handle.Close()
// Process packets
packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
for packet := range packetSource.Packets() {
fmt.Println(packet)
}
}
func main() {
file := flag.String("file", "", "A file to parse")
dev := flag.String("dev", "", "A dev to sniff")
flag.Parse()
if (*file == "" && *dev == "") || (*file != "" && *dev != "") {
flag.Usage()
os.Exit(1)
}
var handle *pcap.Handle
var err error
// Open the pcap file or device.
if *file != "" {
if handle, err = pcap.OpenOffline(*file); err != nil {
panic(err)
}
} else {
if handle, err = pcap.OpenLive(*dev, 8196, true, pcap.BlockForever); err != nil {
panic(err)
}
}
count := 0
bars := []string{"-", "\\", "|", "/"}
sess := qilib.NewSession(qilib.Config{
Handle: handle,
Progress: func(pkt gopacket.Packet) {
fmt.Printf("\r%v ", bars[count%len(bars)])
count++
},
Warning: func(pkt gopacket.Packet, diff qilib.Diff) {
fmt.Printf("\n%v %v\n<A>\n%s\n</A>\n<B>\n%s\n</B>\n", diff.ID, diff.Seq, diff.A, diff.B)
},
Unparseable: func(pkt gopacket.Packet) {
fmt.Printf("\nUnparseable packet\n%v\n", pkt)
},
})
defer sess.Clean()
if err := sess.Run(); err != nil {
log.Fatal(err)
}
fmt.Println()
}