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// Copyright 2016 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 (
"github.com/google/gopacket"
"reflect"
"testing"
)
// VXLAN is specifed in RFC 7348
// 0 1 2 3
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
// 0 8 16 24 32
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// |G|R|R|R|I|R|R|R|R|D|R|R|A|R|R|R| Group Policy ID |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | 24 bit VXLAN Network Identifier | Reserved |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// Ethernet[IP[UDP[VXLAN[Ethernet[IP[ICMP]]]]]]
// testPacketVXLAN
// 0000 00 16 3e 08 71 cf 36 dc 85 1e b3 40 08 00 45 00 ..>.q.6....@..E.
// 0010 00 86 d2 c0 40 00 40 11 51 52 c0 a8 cb 01 c0 a8 ....@.@.QR......
// 0020 ca 01 b0 5d 12 b5 00 72 00 00 08 00 00 00 00 00 ...]...r........
// 0030 00 00 00 30 88 01 00 02 00 16 3e 37 f6 04 08 00 ...0......>7....
// 0040 45 00 00 54 00 00 40 00 40 01 23 4f c0 a8 cb 03 E..T..@.@.#O....
// 0050 c0 a8 cb 05 08 00 f6 f2 05 0c 00 01 fc e2 97 51 ...............Q
// 0060 00 00 00 00 a6 f8 02 00 00 00 00 00 10 11 12 13 ................
// 0070 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 21 22 23 ............ !"#
// 0080 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30 31 32 33 $%&'()*+,-./0123
// 0090 34 35 36 37 4567 ./01234567
var testPacketVXLAN = []byte{
0x00, 0x16, 0x3e, 0x08, 0x71, 0xcf, 0x36, 0xdc, 0x85, 0x1e, 0xb3, 0x40, 0x08, 0x00, 0x45, 0x00,
0x00, 0x86, 0xd2, 0xc0, 0x40, 0x00, 0x40, 0x11, 0x51, 0x52, 0xc0, 0xa8, 0xcb, 0x01, 0xc0, 0xa8,
0xca, 0x01, 0xb0, 0x5d, 0x12, 0xb5, 0x00, 0x72, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00,
0xff, 0x00, 0x00, 0x30, 0x88, 0x01, 0x00, 0x02, 0x00, 0x16, 0x3e, 0x37, 0xf6, 0x04, 0x08, 0x00,
0x45, 0x00, 0x00, 0x54, 0x00, 0x00, 0x40, 0x00, 0x40, 0x01, 0x23, 0x4f, 0xc0, 0xa8, 0xcb, 0x03,
0xc0, 0xa8, 0xcb, 0x05, 0x08, 0x00, 0xf6, 0xf2, 0x05, 0x0c, 0x00, 0x01, 0xfc, 0xe2, 0x97, 0x51,
0x00, 0x00, 0x00, 0x00, 0xa6, 0xf8, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x11, 0x12, 0x13,
0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33,
0x34, 0x35, 0x36, 0x37,
}
func TestPacketVXLAN(t *testing.T) {
p := gopacket.NewPacket(testPacketVXLAN, LinkTypeEthernet, gopacket.Default)
if p.ErrorLayer() != nil {
t.Error("Failed to decode packet:", p.ErrorLayer().Error())
}
checkLayers(p, []gopacket.LayerType{LayerTypeEthernet, LayerTypeIPv4, LayerTypeUDP, LayerTypeVXLAN, LayerTypeEthernet, LayerTypeIPv4, LayerTypeICMPv4, gopacket.LayerTypePayload}, t)
if got, ok := p.Layer(LayerTypeVXLAN).(*VXLAN); ok {
want := &VXLAN{
BaseLayer: BaseLayer{
Contents: []byte{0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00},
Payload: []byte{0x00, 0x30, 0x88, 0x01, 0x00, 0x02, 0x00, 0x16, 0x3e, 0x37, 0xf6, 0x04, 0x08, 0x00,
0x45, 0x00, 0x00, 0x54, 0x00, 0x00, 0x40, 0x00, 0x40, 0x01, 0x23, 0x4f, 0xc0, 0xa8, 0xcb, 0x03,
0xc0, 0xa8, 0xcb, 0x05, 0x08, 0x00, 0xf6, 0xf2, 0x05, 0x0c, 0x00, 0x01, 0xfc, 0xe2, 0x97, 0x51,
0x00, 0x00, 0x00, 0x00, 0xa6, 0xf8, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x11, 0x12, 0x13,
0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33,
0x34, 0x35, 0x36, 0x37},
},
ValidIDFlag: true,
VNI: 255,
GBPExtension: false,
GBPApplied: false,
GBPDontLearn: false,
GBPGroupPolicyID: 0,
}
if !reflect.DeepEqual(want, got) {
t.Errorf("VXLAN layer mismatch, \nwant %#v\ngot %#v\n", want, got)
}
}
}
func BenchmarkDecodePacketVXLAN(b *testing.B) {
for i := 0; i < b.N; i++ {
gopacket.NewPacket(testPacketVXLAN, LinkTypeEthernet, gopacket.NoCopy)
}
}
func TestIsomorphicPacketVXLAN(t *testing.T) {
vx := &VXLAN{
ValidIDFlag: true,
VNI: 255,
GBPExtension: true,
GBPApplied: true,
GBPDontLearn: true,
GBPGroupPolicyID: 777,
}
b := gopacket.NewSerializeBuffer()
vx.SerializeTo(b, gopacket.SerializeOptions{})
p := gopacket.NewPacket(b.Bytes(), gopacket.DecodeFunc(decodeVXLAN), gopacket.Default)
vxTranslated := p.Layer(LayerTypeVXLAN).(*VXLAN)
vxTranslated.BaseLayer = BaseLayer{}
if !reflect.DeepEqual(vx, vxTranslated) {
t.Errorf("VXLAN isomorph mismatch, \nwant %#v\ngot %#v\n", vx, vxTranslated)
}
}
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