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|
// Copyright 2014, Google, Inc. All rights reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file in the root of the source
// tree.
package layers
import (
"bytes"
"net"
"reflect"
"testing"
"github.com/gopacket/gopacket"
)
func TestSerializeIPv6HeaderTLVOptions(t *testing.T) {
//RFC 2460 Appendix B
/*
Example 3
A Hop-by-Hop or Destination Options header containing both options X
and Y from Examples 1 and 2 would have one of the two following
formats, depending on which option appeared first:
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Next Header | Hdr Ext Len=3 | Option Type=X |Opt Data Len=12|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| 4-octet field |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+ 8-octet field +
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| PadN Option=1 |Opt Data Len=1 | 0 | Option Type=Y |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Opt Data Len=7 | 1-octet field | 2-octet field |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| 4-octet field |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| PadN Option=1 |Opt Data Len=2 | 0 | 0 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
opt1 := &ipv6HeaderTLVOption{}
opt1.OptionType = 0x1e
opt1.OptionData = []byte{0xaa, 0xaa, 0xaa, 0xaa, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb}
opt1.OptionAlignment = [2]uint8{8, 2}
opt2 := &ipv6HeaderTLVOption{}
opt2.OptionType = 0x3e
opt2.OptionData = []byte{0x11, 0x22, 0x22, 0x44, 0x44, 0x44, 0x44}
opt2.OptionAlignment = [2]uint8{4, 3}
l := serializeIPv6HeaderTLVOptions(nil, []*ipv6HeaderTLVOption{opt1, opt2}, true)
b := make([]byte, l)
serializeIPv6HeaderTLVOptions(b, []*ipv6HeaderTLVOption{opt1, opt2}, true)
got := b
want := []byte{0x1e, 0x0c, 0xaa, 0xaa, 0xaa, 0xaa, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0x01, 0x01, 0x00, 0x3e, 0x07, 0x11, 0x22, 0x22, 0x44, 0x44, 0x44, 0x44, 0x01, 0x02, 0x00, 0x00}
if !bytes.Equal(got, want) {
t.Errorf("IPv6HeaderTLVOption serialize (X,Y) failed:\ngot:\n%#v\n\nwant:\n%#v\n\n", got, want)
}
/*
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Next Header | Hdr Ext Len=3 | Pad1 Option=0 | Option Type=Y |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Opt Data Len=7 | 1-octet field | 2-octet field |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| 4-octet field |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| PadN Option=1 |Opt Data Len=4 | 0 | 0 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| 0 | 0 | Option Type=X |Opt Data Len=12|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| 4-octet field |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+ 8-octet field +
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
l = serializeIPv6HeaderTLVOptions(nil, []*ipv6HeaderTLVOption{opt2, opt1}, true)
b = make([]byte, l)
serializeIPv6HeaderTLVOptions(b, []*ipv6HeaderTLVOption{opt2, opt1}, true)
got = b
want = []byte{0x00, 0x3e, 0x07, 0x11, 0x22, 0x22, 0x44, 0x44, 0x44, 0x44, 0x01, 0x04, 0x00, 0x00, 0x00, 0x00, 0x1e, 0x0c, 0xaa, 0xaa, 0xaa, 0xaa, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb}
if !bytes.Equal(got, want) {
t.Errorf("IPv6HeaderTLVOption serialize (Y,X) failed:\ngot:\n%#v\n\nwant:\n%#v\n\n", got, want)
}
}
var testPacketIPv6HopByHop0 = []byte{
0x60, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x40, 0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x3b, 0x00, 0x01, 0x04, 0x00, 0x00, 0x00, 0x00,
}
func TestPacketIPv6HopByHop0Serialize(t *testing.T) {
var serialize = make([]gopacket.SerializableLayer, 0, 2)
var err error
ip6 := &IPv6{}
ip6.Version = 6
ip6.NextHeader = IPProtocolIPv6HopByHop
ip6.HopLimit = 64
ip6.SrcIP = net.ParseIP("2001:db8::1")
ip6.DstIP = net.ParseIP("2001:db8::2")
serialize = append(serialize, ip6)
tlv := &IPv6HopByHopOption{}
tlv.OptionType = 0x01 //PadN
tlv.OptionData = []byte{0x00, 0x00, 0x00, 0x00}
hop := &IPv6HopByHop{}
hop.Options = append(hop.Options, tlv)
hop.NextHeader = IPProtocolNoNextHeader
ip6.HopByHop = hop
buf := gopacket.NewSerializeBuffer()
opts := gopacket.SerializeOptions{FixLengths: true}
err = gopacket.SerializeLayers(buf, opts, serialize...)
if err != nil {
t.Fatal(err)
}
got := buf.Bytes()
want := testPacketIPv6HopByHop0
if !bytes.Equal(got, want) {
t.Errorf("IPv6HopByHop serialize failed:\ngot:\n%#v\n\nwant:\n%#v\n\n", got, want)
}
}
func TestPacketIPv6HopByHop0Decode(t *testing.T) {
ip6 := &IPv6{
BaseLayer: BaseLayer{
Contents: []byte{
0x60, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x40, 0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
},
Payload: []byte{},
},
Version: 6,
TrafficClass: 0,
FlowLabel: 0,
Length: 8,
NextHeader: IPProtocolIPv6HopByHop,
HopLimit: 64,
SrcIP: net.IP{0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
DstIP: net.IP{0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02},
}
hop := &ip6.hbh
hop.ipv6ExtensionBase = ipv6ExtensionBase{
BaseLayer: BaseLayer{
Contents: []byte{0x3b, 0x00, 0x01, 0x04, 0x00, 0x00, 0x00, 0x00},
Payload: []byte{},
},
NextHeader: IPProtocolNoNextHeader,
HeaderLength: uint8(0),
ActualLength: 8,
}
opt := &IPv6HopByHopOption{
OptionType: uint8(0x01),
OptionLength: uint8(0x04),
ActualLength: 6,
OptionData: []byte{0x00, 0x00, 0x00, 0x00},
}
hop.Options = append(hop.Options, opt)
ip6.HopByHop = hop
p := gopacket.NewPacket(testPacketIPv6HopByHop0, LinkTypeRaw, gopacket.Default)
if p.ErrorLayer() != nil {
t.Error("Failed to decode packet:", p.ErrorLayer().Error())
}
checkLayers(p, []gopacket.LayerType{LayerTypeIPv6, LayerTypeIPv6HopByHop}, t)
if got, ok := p.Layer(LayerTypeIPv6).(*IPv6); ok {
want := ip6
want.HopByHop = got.HopByHop // avoid comparing pointers
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(LayerTypeIPv6HopByHop).(*IPv6HopByHop); ok {
want := hop
if !reflect.DeepEqual(got, want) {
t.Errorf("IPv6HopByHop packet processing failed:\ngot\n%#v\n\nwant:\n%#v\n\n", got, want)
}
} else {
t.Error("No IPv6HopByHop layer type found in packet")
}
}
// testPacketIPv6Destination0 is the packet:
//
// 12:40:14.429409595 IP6 2001:db8::1 > 2001:db8::2: DSTOPT no next header
// 0x0000: 6000 0000 0008 3c40 2001 0db8 0000 0000 `.....<@........
// 0x0010: 0000 0000 0000 0001 2001 0db8 0000 0000 ................
// 0x0020: 0000 0000 0000 0002 3b00 0104 0000 0000 ........;.......
var testPacketIPv6Destination0 = []byte{
0x60, 0x00, 0x00, 0x00, 0x00, 0x08, 0x3c, 0x40, 0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x3b, 0x00, 0x01, 0x04, 0x00, 0x00, 0x00, 0x00,
}
func TestPacketIPv6Destination0Serialize(t *testing.T) {
var serialize = make([]gopacket.SerializableLayer, 0, 2)
var err error
ip6 := &IPv6{}
ip6.Version = 6
ip6.NextHeader = IPProtocolIPv6Destination
ip6.HopLimit = 64
ip6.SrcIP = net.ParseIP("2001:db8::1")
ip6.DstIP = net.ParseIP("2001:db8::2")
serialize = append(serialize, ip6)
tlv := &IPv6DestinationOption{}
tlv.OptionType = 0x01 //PadN
tlv.OptionData = []byte{0x00, 0x00, 0x00, 0x00}
dst := &IPv6Destination{}
dst.Options = append(dst.Options, tlv)
dst.NextHeader = IPProtocolNoNextHeader
serialize = append(serialize, dst)
buf := gopacket.NewSerializeBuffer()
opts := gopacket.SerializeOptions{FixLengths: true}
err = gopacket.SerializeLayers(buf, opts, serialize...)
if err != nil {
t.Fatal(err)
}
got := buf.Bytes()
want := testPacketIPv6Destination0
if !bytes.Equal(got, want) {
t.Errorf("IPv6Destination serialize failed:\ngot:\n%#v\n\nwant:\n%#v\n\n", got, want)
}
}
func TestPacketIPv6Destination0Decode(t *testing.T) {
ip6 := &IPv6{
BaseLayer: BaseLayer{
Contents: []byte{
0x60, 0x00, 0x00, 0x00, 0x00, 0x08, 0x3c, 0x40, 0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
},
Payload: []byte{0x3b, 0x00, 0x01, 0x04, 0x00, 0x00, 0x00, 0x00},
},
Version: 6,
TrafficClass: 0,
FlowLabel: 0,
Length: 8,
NextHeader: IPProtocolIPv6Destination,
HopLimit: 64,
SrcIP: net.IP{0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
DstIP: net.IP{0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02},
}
dst := &IPv6Destination{}
dst.BaseLayer = BaseLayer{
Contents: []byte{0x3b, 0x00, 0x01, 0x04, 0x00, 0x00, 0x00, 0x00},
Payload: []byte{},
}
dst.NextHeader = IPProtocolNoNextHeader
dst.HeaderLength = uint8(0)
dst.ActualLength = 8
opt := &IPv6DestinationOption{
OptionType: uint8(0x01),
OptionLength: uint8(0x04),
ActualLength: 6,
OptionData: []byte{0x00, 0x00, 0x00, 0x00},
}
dst.Options = append(dst.Options, opt)
p := gopacket.NewPacket(testPacketIPv6Destination0, LinkTypeRaw, gopacket.Default)
if p.ErrorLayer() != nil {
t.Error("Failed to decode packet:", p.ErrorLayer().Error())
}
checkLayers(p, []gopacket.LayerType{LayerTypeIPv6, LayerTypeIPv6Destination}, t)
if got, ok := p.Layer(LayerTypeIPv6).(*IPv6); ok {
want := ip6
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(LayerTypeIPv6Destination).(*IPv6Destination); ok {
want := dst
if !reflect.DeepEqual(got, want) {
t.Errorf("IPv6Destination packet processing failed:\ngot:\n%#v\n\nwant:\n%#v\n\n", got, want)
}
} else {
t.Error("No IPv6Destination layer type found in packet")
}
}
var testPacketIPv6JumbogramHeader = []byte{
0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x3b, 0x00, 0xc2, 0x04, 0x00, 0x01, 0x00, 0x08,
}
func TestIPv6JumbogramSerialize(t *testing.T) {
var serialize = make([]gopacket.SerializableLayer, 0, 2)
var err error
ip6 := &IPv6{}
ip6.Version = 6
ip6.NextHeader = IPProtocolNoNextHeader
ip6.HopLimit = 64
ip6.SrcIP = net.ParseIP("2001:db8::1")
ip6.DstIP = net.ParseIP("2001:db8::2")
serialize = append(serialize, ip6)
payload := make([]byte, ipv6MaxPayloadLength+1)
for i := range payload {
payload[i] = 0xfe
}
serialize = append(serialize, gopacket.Payload(payload))
buf := gopacket.NewSerializeBuffer()
opts := gopacket.SerializeOptions{FixLengths: true}
err = gopacket.SerializeLayers(buf, opts, serialize...)
if err != nil {
t.Fatal(err)
}
got := buf.Bytes()
w := new(bytes.Buffer)
w.Write(testPacketIPv6JumbogramHeader)
w.Write(payload)
want := w.Bytes()
if !bytes.Equal(got, want) {
t.Errorf("IPv6 Jumbogram serialize failed:\ngot:\n%v\n\nwant:\n%v\n\n",
gopacket.LongBytesGoString(got), gopacket.LongBytesGoString(want))
}
}
func TestIPv6JumbogramDecode(t *testing.T) {
payload := make([]byte, ipv6MaxPayloadLength+1)
for i := range payload {
payload[i] = 0xfe
}
ip6 := &IPv6{
BaseLayer: BaseLayer{
Contents: []byte{
0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
},
},
Version: 6,
TrafficClass: 0,
FlowLabel: 0,
Length: 0,
NextHeader: IPProtocolIPv6HopByHop,
HopLimit: 64,
SrcIP: net.IP{0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
DstIP: net.IP{0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02},
}
buf := new(bytes.Buffer)
buf.Write([]byte{0x3b, 0x00, 0xc2, 0x04, 0x00, 0x01, 0x00, 0x08})
buf.Write(payload)
ip6.Payload = buf.Bytes()
hop := &ip6.hbh
hop.Contents = []byte{0x3b, 0x00, 0xc2, 0x04, 0x00, 0x01, 0x00, 0x08}
hop.Payload = payload
hop.NextHeader = IPProtocolNoNextHeader
hop.HeaderLength = uint8(0)
hop.ActualLength = 8
opt := &IPv6HopByHopOption{}
opt.OptionType = uint8(0xc2)
opt.OptionLength = uint8(0x04)
opt.ActualLength = 6
opt.OptionData = []byte{0x00, 0x01, 0x00, 0x08}
hop.Options = append(hop.Options, opt)
ip6.HopByHop = hop
pkt := new(bytes.Buffer)
pkt.Write(testPacketIPv6JumbogramHeader)
pkt.Write(payload)
p := gopacket.NewPacket(pkt.Bytes(), LinkTypeRaw, gopacket.Default)
if p.ErrorLayer() != nil {
t.Error("Failed to decode packet:", p.ErrorLayer().Error())
}
checkLayers(p, []gopacket.LayerType{LayerTypeIPv6, LayerTypeIPv6HopByHop, gopacket.LayerTypePayload}, t)
if got, ok := p.Layer(LayerTypeIPv6).(*IPv6); ok {
want := ip6
want.HopByHop = got.HopByHop // Hack, avoid comparing pointers
if !reflect.DeepEqual(got, want) {
t.Errorf("IPv6 packet processing failed:\ngot:\n%v\n\nwant:\n%v\n\n",
gopacket.LayerGoString(got), gopacket.LayerGoString(want))
}
} else {
t.Error("No IPv6 layer type found in packet")
}
if got, ok := p.Layer(LayerTypeIPv6HopByHop).(*IPv6HopByHop); ok {
want := hop
if !reflect.DeepEqual(got, want) {
t.Errorf("IPv6HopByHop packet processing failed:\ngot:\n%v\n\nwant:\n%v\n\n",
gopacket.LayerGoString(got), gopacket.LayerGoString(want))
}
} else {
t.Error("No IPv6HopByHop layer type found in packet")
}
if got, ok := p.Layer(gopacket.LayerTypePayload).(*gopacket.Payload); ok {
want := (*gopacket.Payload)(&payload)
if !reflect.DeepEqual(got, want) {
t.Errorf("Payload packet processing failed:\ngot:\n%v\n\nwant:\n%v\n\n",
gopacket.LayerGoString(got), gopacket.LayerGoString(want))
}
} else {
t.Error("No Payload layer type found in packet")
}
}
|
