func TestPacketUSB0(t *testing.T) {
p := gopacket.NewPacket(testPacketUSB0, LinkTypeLinuxUSB, gopacket.Default)
if p.ErrorLayer() != nil {
t.Error("Failed to decode packet:", p.ErrorLayer().Error())
}
checkLayers(p, []gopacket.LayerType{LayerTypeUSB, LayerTypeUSBInterrupt}, t)
if got, ok := p.Layer(LayerTypeUSB).(*USB); ok {
want := &USB{
BaseLayer: BaseLayer{
Contents: []uint8{0x0, 0x38, 0x4a, 0x3b, 0x0, 0x88, 0xff, 0xff, 0x43, 0x1, 0x81, 0x1, 0x2, 0x0, 0x2d, 0x0, 0xc0, 0xd3, 0x5b, 0x50, 0x0, 0x0, 0x0, 0x0, 0x8a, 0x85, 0xa, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0},
Payload: []uint8{0x4},
},
ID: 0xffff88003b4a3800,
EventType: USBEventTypeComplete,
TransferType: USBTransportTypeInterrupt,
Direction: 0x1,
EndpointNumber: 0x1,
DeviceAddress: 0x1,
BusID: 0x2,
TimestampSec: 1348195264,
TimestampUsec: 689546,
Setup: false,
Data: true,
Status: 0,
UrbLength: 0x1,
UrbDataLength: 0x1,
}
if !reflect.DeepEqual(got, want) {
t.Errorf("USB packet processing failed:\ngot :\n%#v\n\nwant :\n%#v\n\n", got, want)
}
}
}
func TestPacketDot11DataIP(t *testing.T) {
p := gopacket.NewPacket(testPacketDot11DataIP, LinkTypeIEEE80211Radio, gopacket.Default)
if p.ErrorLayer() != nil {
t.Error("Failed to decode packet:", p.ErrorLayer().Error())
}
checkLayers(p, []gopacket.LayerType{LayerTypeRadioTap, LayerTypeDot11, LayerTypeDot11Data, LayerTypeLLC, LayerTypeSNAP, LayerTypeIPv4, LayerTypeUDP, gopacket.LayerTypePayload}, t)
}
func TestPacketDot11DataARP(t *testing.T) {
p := gopacket.NewPacket(testPacketDot11DataARP, LinkTypeIEEE80211Radio, gopacket.Default)
if p.ErrorLayer() != nil {
t.Error("Failed to decode packet:", p.ErrorLayer().Error())
}
checkLayers(p, []gopacket.LayerType{LayerTypeRadioTap, LayerTypeDot11, LayerTypeDot11Data, LayerTypeLLC, LayerTypeSNAP, LayerTypeARP}, t)
if got, ok := p.Layer(LayerTypeARP).(*ARP); ok {
want := &ARP{
BaseLayer: BaseLayer{
Contents: []uint8{0x0, 0x1, 0x8, 0x0, 0x6, 0x4, 0x0, 0x1, 0x0, 0x19, 0xe3, 0xd3, 0x53, 0x52, 0xa9, 0xfe, 0xf7, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x43, 0x8, 0xe, 0x36},
Payload: []uint8{},
},
AddrType: 0x1,
Protocol: 0x800,
HwAddressSize: 0x6,
ProtAddressSize: 0x4,
Operation: 0x1,
SourceHwAddress: []uint8{0x0, 0x19, 0xe3, 0xd3, 0x53, 0x52},
SourceProtAddress: []uint8{0xa9, 0xfe, 0xf7, 0x0},
DstHwAddress: []uint8{0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
DstProtAddress: []uint8{0x43, 0x8, 0xe, 0x36},
}
if !reflect.DeepEqual(got, want) {
t.Errorf("ARP packet processing failed:\ngot :\n%#v\n\nwant :\n%#v\n\n", got, want)
}
}
}
func TestPacketIPSecESP(t *testing.T) {
p := gopacket.NewPacket(testPacketIPSecESP, LinkTypeEthernet, gopacket.Default)
if p.ErrorLayer() != nil {
t.Error("Failed to decode packet:", p.ErrorLayer().Error())
}
checkLayers(p, []gopacket.LayerType{LayerTypeEthernet, LayerTypeIPv4, LayerTypeIPSecESP}, t)
}
func TestPacketDot11CtrlAck(t *testing.T) {
p := gopacket.NewPacket(testPacketDot11CtrlAck, LinkTypeIEEE80211Radio, gopacket.Default)
if p.ErrorLayer() != nil {
t.Error("Failed to decode packet:", p.ErrorLayer().Error())
}
checkLayers(p, []gopacket.LayerType{LayerTypeRadioTap, LayerTypeDot11}, t)
if got, ok := p.Layer(LayerTypeDot11).(*Dot11); ok {
if !got.ChecksumValid() {
t.Errorf("Dot11 packet processing failed:\nchecksum failed. got :\n%#v\n\n", got)
}
}
if got, ok := p.Layer(LayerTypeDot11).(*Dot11); ok {
want := &Dot11{
BaseLayer: BaseLayer{
Contents: []uint8{0xd4, 0x0, 0x0, 0x0, 0x0, 0x19, 0xe3, 0xd3, 0x53, 0x52},
Payload: []uint8{},
},
Type: Dot11TypeCtrlAck,
Proto: 0x0,
Flags: 0x0,
DurationID: 0x0,
Address1: net.HardwareAddr{0x0, 0x19, 0xe3, 0xd3, 0x53, 0x52},
Address2: net.HardwareAddr(nil),
Address3: net.HardwareAddr(nil),
Address4: net.HardwareAddr(nil),
Checksum: 0x8776e946,
}
if !reflect.DeepEqual(got, want) {
t.Errorf("Dot11 packet processing failed:\ngot :\n%#v\n\nwant :\n%#v\n\n", got, want)
}
}
}
func TestPacketP6196(t *testing.T) {
p := gopacket.NewPacket(testPacketP6196, LinkTypeIEEE80211Radio, gopacket.Default)
if p.ErrorLayer() != nil {
t.Error("Failed to decode packet:", p.ErrorLayer().Error())
}
checkLayers(p, []gopacket.LayerType{LayerTypeRadioTap, LayerTypeDot11, LayerTypeDot11WEP}, t)
}
func TestPacketICMPv6(t *testing.T) {
p := gopacket.NewPacket(testPacketICMPv6, LinkTypeEthernet, gopacket.Default)
if p.ErrorLayer() != nil {
t.Error("Failed to decode packet:", p.ErrorLayer().Error())
}
checkLayers(p, []gopacket.LayerType{LayerTypeEthernet, LayerTypeIPv6, LayerTypeICMPv6, gopacket.LayerTypePayload}, t)
if got, ok := p.Layer(LayerTypeIPv6).(*IPv6); ok {
want := &IPv6{
BaseLayer: BaseLayer{
Contents: []byte{0x60, 0x0, 0x0, 0x0, 0x0, 0x18,
0x3a, 0xff, 0x26, 0x20, 0x0, 0x0, 0x10, 0x5, 0x0, 0x0, 0x26, 0xbe, 0x5,
0xff, 0xfe, 0x27, 0xb, 0x17, 0xfe, 0x80, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x2, 0x1f, 0xca, 0xff, 0xfe, 0xb3, 0x76, 0x40},
Payload: []byte{0x88, 0x0, 0x1e, 0xd6, 0x40, 0x0, 0x0, 0x0, 0x26, 0x20,
0x0, 0x0, 0x10, 0x5, 0x0, 0x0, 0x26, 0xbe, 0x5, 0xff, 0xfe, 0x27, 0xb,
0x17},
},
Version: 6,
TrafficClass: 0,
FlowLabel: 0,
Length: 24,
NextHeader: IPProtocolICMPv6,
HopLimit: 255,
SrcIP: net.IP{0x26, 0x20, 0x0, 0x0, 0x10, 0x5, 0x0, 0x0, 0x26, 0xbe, 0x5, 0xff, 0xfe, 0x27, 0xb, 0x17},
DstIP: net.IP{0xfe, 0x80, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2, 0x1f, 0xca, 0xff, 0xfe, 0xb3, 0x76, 0x40},
}
if !reflect.DeepEqual(got, want) {
t.Errorf("IPv6 packet processing failed:\ngot :\n%#v\n\nwant :\n%#v\n\n", got, want)
}
} else {
t.Error("No IPv6 layer type found in packet")
}
if got, ok := p.Layer(LayerTypeICMPv6).(*ICMPv6); ok {
want := &ICMPv6{
BaseLayer: BaseLayer{
Contents: []byte{0x88, 0x0, 0x1e, 0xd6, 0x40, 0x0, 0x0, 0x0},
Payload: []byte{0x26, 0x20, 0x0, 0x0, 0x10,
0x5, 0x0, 0x0, 0x26, 0xbe, 0x5, 0xff, 0xfe, 0x27, 0xb, 0x17},
},
TypeCode: 0x8800,
Checksum: 0x1ed6,
TypeBytes: []byte{0x40, 0x0, 0x0, 0x0},
}
if !reflect.DeepEqual(got, want) {
t.Errorf("ICMPv6 packet processing failed:\ngot :\n%#v\n\nwant :\n%#v\n\n", got, want)
}
if got.TypeCode.String() != "NeighborAdvertisement(0)" {
t.Errorf("ICMPv6 type code, got %q want 'NeighborAdvertisement(0)'", got.TypeCode.String())
}
} else {
t.Error("No ICMPv6 layer type found in packet")
}
}
// getHwAddr is a hacky but effective way to get the destination hardware
// address for our packets. It does an ARP request for our gateway (if there is
// one) or destination IP (if no gateway is necessary), then waits for an ARP
// reply. This is pretty slow right now, since it blocks on the ARP
// request/reply.
func (s *scanner) getHwAddr() (net.HardwareAddr, error) {
start := time.Now()
arpDst := s.dst
if s.gw != nil {
arpDst = s.gw
}
// Prepare the layers to send for an ARP request.
eth := layers.Ethernet{
SrcMAC: s.iface.HardwareAddr,
DstMAC: net.HardwareAddr{0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
EthernetType: layers.EthernetTypeARP,
}
arp := layers.ARP{
AddrType: layers.LinkTypeEthernet,
Protocol: layers.EthernetTypeIPv4,
HwAddressSize: 6,
ProtAddressSize: 4,
Operation: layers.ARPRequest,
SourceHwAddress: []byte(s.iface.HardwareAddr),
SourceProtAddress: []byte(s.src),
DstHwAddress: []byte{0, 0, 0, 0, 0, 0},
DstProtAddress: []byte(arpDst),
}
// Send a single ARP request packet (we never retry a send, since this
// is just an example ;)
if err := s.send(ð, &arp); err != nil {
return nil, err
}
// Wait 3 seconds for an ARP reply.
for {
if time.Since(start) > time.Second*3 {
return nil, fmt.Errorf("timeout getting ARP reply")
}
data, _, err := s.handle.ReadPacketData()
if err == pcap.NextErrorTimeoutExpired {
continue
} else if err != nil {
return nil, err
}
packet := gopacket.NewPacket(data, layers.LayerTypeEthernet, gopacket.NoCopy)
if arpLayer := packet.Layer(layers.LayerTypeARP); arpLayer != nil {
arp := arpLayer.(*layers.ARP)
if bytes.Equal(arp.SourceProtAddress, arpDst) {
return net.HardwareAddr(arp.SourceHwAddress), nil
}
}
}
}
func loadDNS(dnspacket []byte, t *testing.T) *DNS {
p := gopacket.NewPacket(dnspacket, LinkTypeEthernet, gopacket.Default)
if p.ErrorLayer() != nil {
t.Error("Failed to decode packet:", p.ErrorLayer().Error())
}
checkLayers(p, []gopacket.LayerType{LayerTypeEthernet, LayerTypeIPv4,
LayerTypeUDP, LayerTypeDNS}, t)
dnsL := p.Layer(LayerTypeDNS)
if dnsL == nil {
t.Error("No DNS Layer found")
}
dns, ok := dnsL.(*DNS)
if !ok {
return nil
}
return dns
}
func TestUDPPacketDNS(t *testing.T) {
p := gopacket.NewPacket(testUDPPacketDNS, LinkTypeEthernet, gopacket.Default)
if p.ErrorLayer() != nil {
t.Error("Failed to decode packet:", p.ErrorLayer().Error())
}
checkLayers(p, []gopacket.LayerType{LayerTypeEthernet, LayerTypeIPv4, LayerTypeUDP, LayerTypeDNS}, t)
if got, ok := p.TransportLayer().(*UDP); ok {
want := &UDP{
BaseLayer: BaseLayer{
Contents: []byte{0x0, 0x35, 0x89, 0x6d, 0x0, 0xd2, 0x75, 0x4a},
Payload: []byte{0xb8, 0xd8, 0x81, 0x80, 0x0, 0x1, 0x0,
0x7, 0x0, 0x0, 0x0, 0x0, 0x4, 0x78, 0x6b, 0x63, 0x64, 0x3, 0x63, 0x6f,
0x6d, 0x0, 0x0, 0xf, 0x0, 0x1, 0xc0, 0xc, 0x0, 0xf, 0x0, 0x1, 0x0, 0x0,
0x2, 0x58, 0x0, 0x18, 0x0, 0x14, 0x4, 0x41, 0x4c, 0x54, 0x32, 0x5, 0x41,
0x53, 0x50, 0x4d, 0x58, 0x1, 0x4c, 0x6, 0x47, 0x4f, 0x4f, 0x47, 0x4c,
0x45, 0xc0, 0x11, 0xc0, 0xc, 0x0, 0xf, 0x0, 0x1, 0x0, 0x0, 0x2, 0x58, 0x0,
0x16, 0x0, 0x1e, 0x6, 0x41, 0x53, 0x50, 0x4d, 0x58, 0x32, 0xa, 0x47, 0x4f,
0x4f, 0x47, 0x4c, 0x45, 0x4d, 0x41, 0x49, 0x4c, 0xc0, 0x11, 0xc0, 0xc,
0x0, 0xf, 0x0, 0x1, 0x0, 0x0, 0x2, 0x58, 0x0, 0xb, 0x0, 0x1e, 0x6, 0x41,
0x53, 0x50, 0x4d, 0x58, 0x33, 0xc0, 0x53, 0xc0, 0xc, 0x0, 0xf, 0x0, 0x1,
0x0, 0x0, 0x2, 0x58, 0x0, 0xb, 0x0, 0x1e, 0x6, 0x41, 0x53, 0x50, 0x4d,
0x58, 0x34, 0xc0, 0x53, 0xc0, 0xc, 0x0, 0xf, 0x0, 0x1, 0x0, 0x0, 0x2,
0x58, 0x0, 0xb, 0x0, 0x1e, 0x6, 0x41, 0x53, 0x50, 0x4d, 0x58, 0x35, 0xc0,
0x53, 0xc0, 0xc, 0x0, 0xf, 0x0, 0x1, 0x0, 0x0, 0x2, 0x58, 0x0, 0x4, 0x0,
0xa, 0xc0, 0x2d, 0xc0, 0xc, 0x0, 0xf, 0x0, 0x1, 0x0, 0x0, 0x2, 0x58, 0x0,
0x9, 0x0, 0x14, 0x4, 0x41, 0x4c, 0x54, 0x31, 0xc0, 0x2d},
},
SrcPort: 53,
DstPort: 35181,
Length: 210,
Checksum: 30026,
sPort: []byte{0x0, 0x35},
dPort: []byte{0x89, 0x6d},
}
if !reflect.DeepEqual(got, want) {
t.Errorf("UDP packet mismatch:\ngot :\n%#v\n\nwant :\n%#v\n\n", got, want)
}
} else {
t.Error("Transport layer packet not UDP")
}
}
func TestPacketDot11MgmtBeacon(t *testing.T) {
p := gopacket.NewPacket(testPacketDot11MgmtBeacon, LinkTypeIEEE80211Radio, gopacket.Default)
if p.ErrorLayer() != nil {
t.Error("Failed to decode packet:", p.ErrorLayer().Error())
}
checkLayers(p, []gopacket.LayerType{LayerTypeRadioTap, LayerTypeDot11, LayerTypeDot11MgmtBeacon}, t)
if got, ok := p.Layer(LayerTypeRadioTap).(*RadioTap); ok {
want := &RadioTap{BaseLayer: BaseLayer{Contents: []uint8{0x0, 0x0, 0x20, 0x0, 0x67, 0x8, 0x4, 0x0, 0xe9, 0xa2, 0xfe, 0x25, 0x0, 0x0, 0x0, 0x0, 0x22, 0xc, 0xd8, 0xa0, 0x2, 0x0, 0x0, 0x0, 0x40, 0x1, 0x0, 0x0, 0x3c, 0x14, 0x24, 0x11}, Payload: []uint8{0x80, 0x0, 0x0, 0x0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x0, 0x3, 0x7f, 0x7, 0xa0, 0x16, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xd0, 0x9b, 0x38, 0x40, 0x10, 0x28, 0x0, 0x0, 0x0, 0x0, 0x64, 0x0, 0x0, 0x5, 0x0, 0x0, 0x1, 0x8, 0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c, 0x3, 0x1, 0x24, 0x5, 0x4, 0x0, 0x1, 0x0, 0x0, 0x7, 0x2a, 0x55, 0x53, 0x20, 0x24, 0x1, 0x11, 0x28, 0x1, 0x11, 0x2c, 0x1, 0x11, 0x30, 0x1, 0x11, 0x34, 0x1, 0x17, 0x38, 0x1, 0x17, 0x3c, 0x1, 0x17, 0x40, 0x1, 0x17, 0x95, 0x1, 0x1e, 0x99, 0x1, 0x1e, 0x9d, 0x1, 0x1e, 0xa1, 0x1, 0x1e, 0xa5, 0x1, 0x1e, 0x20, 0x1, 0x0, 0xdd, 0x18, 0x0, 0x50, 0xf2, 0x2, 0x1, 0x1, 0x0, 0x0, 0x3, 0xa4, 0x0, 0x0, 0x27, 0xa4, 0x0, 0x0, 0x42, 0x43, 0x5e, 0x0, 0x62, 0x32, 0x2f, 0x0, 0x34, 0xc, 0x66, 0x72, 0x65, 0x65, 0x62, 0x73, 0x64, 0x2d, 0x6d, 0x65, 0x73, 0x68, 0x33, 0x17, 0x1, 0x0, 0xf, 0xac, 0x0, 0x0, 0xf, 0xac, 0x0, 0x0, 0xf, 0xac, 0xff, 0x0, 0xf, 0xac, 0xff, 0x0, 0xf, 0xac, 0xff, 0x0, 0xdf}}, Version: 0x0, Length: 0x20, Present: 0x40867, TSFT: 0x25fea2e9, Flags: 0x22, Rate: 0xc, ChannelFrequency: 0x0, ChannelFlags: 0x0, FHSS: 0x0, DBMAntennaSignal: -40, DBMAntennaNoise: -96, LockQuality: 0x0, TxAttenuation: 0x0, DBTxAttenuation: 0x0, DBMTxPower: 0, Antenna: 0x2, DBAntennaSignal: 0x0, DBAntennaNoise: 0x0}
if !reflect.DeepEqual(got, want) {
t.Errorf("RadioTap packet processing failed:\ngot :\n%#v\n\nwant :\n%#v\n\n", got, want)
}
}
if got, ok := p.Layer(LayerTypeDot11).(*Dot11); ok {
want := &Dot11{
BaseLayer: BaseLayer{
Contents: []uint8{0x80, 0x0, 0x0, 0x0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x0, 0x3, 0x7f, 0x7, 0xa0, 0x16, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xd0, 0x9b},
Payload: []uint8{0x38, 0x40, 0x10, 0x28, 0x0, 0x0, 0x0, 0x0, 0x64, 0x0, 0x0, 0x5, 0x0, 0x0, 0x1, 0x8, 0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c, 0x3, 0x1, 0x24, 0x5, 0x4, 0x0, 0x1, 0x0, 0x0, 0x7, 0x2a, 0x55, 0x53, 0x20, 0x24, 0x1, 0x11, 0x28, 0x1, 0x11, 0x2c, 0x1, 0x11, 0x30, 0x1, 0x11, 0x34, 0x1, 0x17, 0x38, 0x1, 0x17, 0x3c, 0x1, 0x17, 0x40, 0x1, 0x17, 0x95, 0x1, 0x1e, 0x99, 0x1, 0x1e, 0x9d, 0x1, 0x1e, 0xa1, 0x1, 0x1e, 0xa5, 0x1, 0x1e, 0x20, 0x1, 0x0, 0xdd, 0x18, 0x0, 0x50, 0xf2, 0x2, 0x1, 0x1, 0x0, 0x0, 0x3, 0xa4, 0x0, 0x0, 0x27, 0xa4, 0x0, 0x0, 0x42, 0x43, 0x5e, 0x0, 0x62, 0x32, 0x2f, 0x0, 0x34, 0xc, 0x66, 0x72, 0x65, 0x65, 0x62, 0x73, 0x64, 0x2d, 0x6d, 0x65, 0x73, 0x68, 0x33, 0x17, 0x1, 0x0, 0xf, 0xac, 0x0, 0x0, 0xf, 0xac, 0x0, 0x0, 0xf, 0xac, 0xff, 0x0, 0xf, 0xac, 0xff, 0x0, 0xf},
},
Type: Dot11TypeMgmtBeacon,
Proto: 0x0,
Flags: 0x0,
DurationID: 0x0,
Address1: net.HardwareAddr{0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
Address2: net.HardwareAddr{0x0, 0x3, 0x7f, 0x7, 0xa0, 0x16},
Address3: net.HardwareAddr{0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
Address4: net.HardwareAddr(nil),
SequenceNumber: 0x26f, FragmentNumber: 0x10,
Checksum: 0xdf00ffac,
}
if !reflect.DeepEqual(got, want) {
t.Errorf("Dot11 packet processing failed:\ngot :\n%#v\n\nwant :\n%#v\n\n", got, want)
}
}
}
func TestPacketDot11MgmtAction(t *testing.T) {
p := gopacket.NewPacket(testPacketDot11MgmtAction, LinkTypeIEEE80211Radio, gopacket.Default)
if p.ErrorLayer() != nil {
t.Error("Failed to decode packet:", p.ErrorLayer().Error())
}
checkLayers(p, []gopacket.LayerType{LayerTypeRadioTap, LayerTypeDot11, LayerTypeDot11MgmtAction}, t)
want := `PACKET: 97 bytes
- Layer 1 (32 bytes) = RadioTap {Contents=[..32..] Payload=[..65..] Version=0 Length=32 Present=264295 TSFT=634199967 Flags=SHORT-PREAMBLE,DATAPAD Rate=6 Mb/s ChannelFrequency=0 MHz ChannelFlags= FHSS=0 DBMAntennaSignal=-41 DBMAntennaNoise=-96 LockQuality=0 TxAttenuation=0 DBTxAttenuation=0 DBMTxPower=0 Antenna=1 DBAntennaSignal=0 DBAntennaNoise=0}
- Layer 2 (24 bytes) = Dot11 {Contents=[..24..] Payload=[..37..] Type=MgmtAction Proto=0 Flags= DurationID=0 Address1=ff:ff:ff:ff:ff:ff Address2=00:03:7f:07:a0:16 Address3=00:03:7f:07:a0:16 Address4= SequenceNumber=10 FragmentNumber=32 Checksum=0}
- Layer 3 (37 bytes) = Dot11MgmtAction {Contents=[..37..] Payload=[]}
`
if got := p.String(); got != want {
t.Errorf("packet string mismatch:\n---got---\n%q\n---want---\n%q", got, want)
}
if _, ok := p.Layer(LayerTypeDot11).(*Dot11); !ok {
t.Errorf("could not get Dot11 layer from packet")
} else {
// See note above: this checksum fails most likely due to datapad.
// wireshark also says this packet is malformed, so I'm not going to waste
// too much more time on it.
// if !got.ChecksumValid() { t.Errorf("Dot11 packet processing failed: checksum failed") }
}
}
func BenchmarkDecodePacketIPSecESP(b *testing.B) {
for i := 0; i < b.N; i++ {
gopacket.NewPacket(testPacketIPSecESP, LinkTypeEthernet, gopacket.NoCopy)
}
}
func TestPacketDot11CtrlCTS(t *testing.T) {
p := gopacket.NewPacket(testPacketDot11CtrlCTS, LinkTypeIEEE80211Radio, gopacket.Default)
if p.ErrorLayer() != nil {
t.Error("Failed to decode packet:", p.ErrorLayer().Error())
}
checkLayers(p, []gopacket.LayerType{LayerTypeRadioTap, LayerTypeDot11}, t)
if got, ok := p.Layer(LayerTypeRadioTap).(*RadioTap); ok {
want := &RadioTap{
BaseLayer: BaseLayer{
Contents: []uint8{0x0, 0x0, 0x19, 0x0, 0x6f, 0x8, 0x0, 0x0, 0x37, 0x68, 0x3a, 0x1, 0x0, 0x0, 0x0, 0x0, 0x12, 0x30, 0x78, 0x14, 0x40, 0x1, 0xb1, 0xa4, 0x1},
Payload: []uint8{0xc4, 0x0, 0x94, 0x0, 0xd8, 0xa2, 0x5e, 0x97, 0x61, 0xc1, 0x36, 0x50, 0x95, 0x8e},
},
Version: 0x0,
Length: 0x19,
Present: 0x86f,
TSFT: 0x13a6837,
Flags: 0x12,
Rate: 0x30,
ChannelFrequency: 0x1478,
ChannelFlags: 0x40,
FHSS: 0x0,
DBMAntennaSignal: 1,
DBMAntennaNoise: -79,
LockQuality: 0x0,
TxAttenuation: 0x0,
DBTxAttenuation: 0x0,
DBMTxPower: 0,
Antenna: 0xa4,
DBAntennaSignal: 0x0,
DBAntennaNoise: 0x0,
}
if !reflect.DeepEqual(got, want) {
t.Errorf("RadioTap packet processing failed:\ngot :\n%#v\n\nwant :\n%#v\n\n", got, want)
}
}
if got, ok := p.Layer(LayerTypeDot11).(*Dot11); ok {
if !got.ChecksumValid() {
t.Errorf("Dot11 packet processing failed:\nchecksum failed. got :\n%#v\n\n", got)
}
want := &Dot11{
BaseLayer: BaseLayer{
Contents: []uint8{0xc4, 0x0, 0x94, 0x0, 0xd8, 0xa2, 0x5e, 0x97, 0x61, 0xc1},
Payload: []uint8{},
},
Type: Dot11TypeCtrlCTS,
Proto: 0x0,
Flags: 0x0,
DurationID: 0x94,
Address1: net.HardwareAddr{0xd8, 0xa2, 0x5e, 0x97, 0x61, 0xc1}, // check
Address2: net.HardwareAddr(nil),
Address3: net.HardwareAddr(nil),
Address4: net.HardwareAddr(nil),
Checksum: 0x8e955036,
}
if !reflect.DeepEqual(got, want) {
t.Errorf("Dot11 packet processing failed:\ngot :\n%#v\n\nwant :\n%#v\n\n", got, want)
}
}
}
func BenchmarkDecodePacketUSB0(b *testing.B) {
for i := 0; i < b.N; i++ {
gopacket.NewPacket(testPacketUSB0, LinkTypeLinuxUSB, gopacket.NoCopy)
}
}
func BenchmarkDecodePacketDot11CtrlCTS(b *testing.B) {
for i := 0; i < b.N; i++ {
gopacket.NewPacket(testPacketDot11CtrlCTS, LinkTypeIEEE80211Radio, gopacket.NoCopy)
}
}
// scan scans the dst IP address of this scanner.
func (s *scanner) scan() error {
// First off, get the MAC address we should be sending packets to.
hwaddr, err := s.getHwAddr()
if err != nil {
return err
}
// Construct all the network layers we need.
eth := layers.Ethernet{
SrcMAC: s.iface.HardwareAddr,
DstMAC: hwaddr,
EthernetType: layers.EthernetTypeIPv4,
}
ip4 := layers.IPv4{
SrcIP: s.src,
DstIP: s.dst,
Version: 4,
TTL: 64,
Protocol: layers.IPProtocolTCP,
}
tcp := layers.TCP{
SrcPort: 54321,
DstPort: 0, // will be incremented during the scan
SYN: true,
}
tcp.SetNetworkLayerForChecksum(&ip4)
// Create the flow we expect returning packets to have, so we can check
// against it and discard useless packets.
ipFlow := gopacket.NewFlow(layers.EndpointIPv4, s.dst, s.src)
start := time.Now()
for {
// Send one packet per loop iteration until we've sent packets
// to all of ports [1, 65535].
if tcp.DstPort < 65535 {
start = time.Now()
tcp.DstPort++
if err := s.send(ð, &ip4, &tcp); err != nil {
log.Printf("error sending to port %v: %v", tcp.DstPort, err)
}
}
// Time out 5 seconds after the last packet we sent.
if time.Since(start) > time.Second*5 {
log.Printf("timed out for %v, assuming we've seen all we can", s.dst)
return nil
}
// Read in the next packet.
data, _, err := s.handle.ReadPacketData()
if err == pcap.NextErrorTimeoutExpired {
continue
} else if err != nil {
log.Printf("error reading packet: %v", err)
continue
}
// Parse the packet. We'd use DecodingLayerParser here if we
// wanted to be really fast.
packet := gopacket.NewPacket(data, layers.LayerTypeEthernet, gopacket.NoCopy)
// Find the packets we care about, and print out logging
// information about them. All others are ignored.
if net := packet.NetworkLayer(); net == nil {
// log.Printf("packet has no network layer")
} else if net.NetworkFlow() != ipFlow {
// log.Printf("packet does not match our ip src/dst")
} else if tcpLayer := packet.Layer(layers.LayerTypeTCP); tcpLayer == nil {
// log.Printf("packet has not tcp layer")
} else if tcp, ok := tcpLayer.(*layers.TCP); !ok {
// We panic here because this is guaranteed to never
// happen.
panic("tcp layer is not tcp layer :-/")
} else if tcp.DstPort != 54321 {
// log.Printf("dst port %v does not match", tcp.DstPort)
} else if tcp.RST {
log.Printf(" port %v closed", tcp.SrcPort)
} else if tcp.SYN && tcp.ACK {
log.Printf(" port %v open", tcp.SrcPort)
} else {
// log.Printf("ignoring useless packet")
}
}
}
func BenchmarkDecodeDNS(b *testing.B) {
for i := 0; i < b.N; i++ {
gopacket.NewPacket(testDNSQueryA, LinkTypeEthernet, gopacket.NoCopy)
}
}