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expectedLen: 3,
},
}
for _, test := range tests {
buf := bytes.NewBuffer(nil)
n := test.input.serializeAtomicAggregate(buf)
if n != test.expectedLen {
t.Errorf("Unexpected length for test %q: %d", test.name, n)
continue
}
assert.Equal(t, test.expected, buf.Bytes())
}
}
func TestSerializeAggregator(t *testing.T) {
tests := []struct {
name string
input *PathAttribute
expected []byte
expectedLen uint8
}{
{
name: "Test #1",
input: &PathAttribute{
TypeCode: AggregatorAttr,
Value: uint16(174),
},
expected: []byte{
192, // Attribute flags
7, // Type
2, // Length
0, 174, // Value = 174
},
expectedLen: 5,
},
}
for _, test := range tests {
buf := bytes.NewBuffer(nil)
n := test.input.serializeAggregator(buf)
if n != test.expectedLen {
t.Errorf("Unexpected length for test %q: %d", test.name, n)
continue
}
assert.Equal(t, test.expected, buf.Bytes())
}
}
func TestSerializeASPath(t *testing.T) {
tests := []struct {
name string
input *PathAttribute
expected []byte
expectedLen uint8
}{
{
name: "Test #1",
input: &PathAttribute{
TypeCode: ASPathAttr,
Value: ASPath{
{
Type: 2, // Sequence
ASNs: []uint32{
100, 200, 210,
},
},
},
},
expected: []byte{
64, // Attribute flags
2, // Type
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2, // AS_SEQUENCE
3, // ASN count
0, 100, // ASN 100
0, 200, // ASN 200
0, 210, // ASN 210
},
expectedLen: 10,
},
}
for _, test := range tests {
buf := bytes.NewBuffer(nil)
n := test.input.serializeASPath(buf)
if n != test.expectedLen {
t.Errorf("Unexpected length for test %q: %d", test.name, n)
continue
}
assert.Equal(t, test.expected, buf.Bytes())
}
}
func TestSerialize(t *testing.T) {
tests := []struct {
name string
msg *BGPUpdate
expected []byte
wantFail bool
}{
{
name: "Withdraw only",
msg: &BGPUpdate{
WithdrawnRoutes: &NLRI{
IP: [4]byte{100, 110, 120, 0},
Pfxlen: 24,
},
},
expected: []byte{
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0, 27, // Length
2, // Msg Type
0, 4, // Withdrawn Routes Length
24, 100, 110, 120, // NLRI
0, 0, // Total Path Attribute Length
},
},
{
name: "NLRI only",
msg: &BGPUpdate{
NLRI: &NLRI{
IP: [4]byte{100, 110, 128, 0},
Pfxlen: 17,
},
},
expected: []byte{
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0, 27, // Length
2, // Msg Type
0, 0, // Withdrawn Routes Length
0, 0, // Total Path Attribute Length
17, 100, 110, 128, // NLRI
},
},
{
name: "Path Attributes only",
msg: &BGPUpdate{
PathAttributes: &PathAttribute{
Optional: true,
Transitive: true,
TypeCode: OriginAttr,
Value: uint8(0), // IGP
},
},
expected: []byte{
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0, 27, // Length
2, // Msg Type
0, 0, // Withdrawn Routes Length
0, 4, // Total Path Attribute Length
64, // Attr. Flags
1, // Attr. Type Code
1, // Length
0, // Value
},
},
{
name: "Full test",
msg: &BGPUpdate{
WithdrawnRoutes: &NLRI{
IP: [4]byte{10, 0, 0, 0},
Pfxlen: 8,
Next: &NLRI{
IP: [4]byte{192, 168, 0, 0},
Pfxlen: 16,
},
},
PathAttributes: &PathAttribute{
TypeCode: OriginAttr,
Value: uint8(0),
Next: &PathAttribute{
TypeCode: ASPathAttr,
Value: ASPath{
{
Type: 2,
ASNs: []uint32{100, 155, 200},
},
{
Type: 1,
ASNs: []uint32{10, 20},
},
},
Next: &PathAttribute{
TypeCode: NextHopAttr,
Value: [4]byte{10, 20, 30, 40},
Next: &PathAttribute{
TypeCode: MEDAttr,
Value: uint32(100),
Next: &PathAttribute{
TypeCode: LocalPrefAttr,
Value: uint32(500),
Next: &PathAttribute{
TypeCode: AtomicAggrAttr,
Next: &PathAttribute{
TypeCode: AggregatorAttr,
Value: uint16(200),
},
},
},
},
},
},
},
NLRI: &NLRI{
IP: [4]byte{8, 8, 8, 0},
Pfxlen: 24,
Next: &NLRI{
IP: [4]byte{185, 65, 240, 0},
Pfxlen: 22,
},
},
},
expected: []byte{
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0, 85, // Length
2, // Msg Type
// Withdraws
0, 5, // Withdrawn Routes Length
8, 10, // Withdraw 10/8
16, 192, 168, // Withdraw 192.168/16
0, 49, // Total Path Attribute Length
// ORIGIN
64, // Attr. Flags
1, // Attr. Type Code
1, // Length
0, // Value
// ASPath
64, // Attr. Flags
2, // Attr. Type Code
2, // Path Segment Type = AS_SEQUENCE
3, // Path Segment Length
0, 100, 0, 155, 0, 200, // ASNs
1, // Path Segment Type = AS_SET
2, // Path Segment Type = AS_SET
0, 10, 0, 20, // ASNs
// Next Hop
64, // Attr. Flags
3, // Attr. Type Code
4, // Length
10, 20, 30, 40, // Next Hop Address
// MED
128, // Attr. Flags
4, // Attr Type Code
4, // Length
0, 0, 0, 100, // MED = 100
// LocalPref
64, // Attr. Flags
5, // Attr. Type Code
4, // Length
0, 0, 1, 244, // Localpref
// Atomic Aggregate
64, // Attr. Flags
6, // Attr. Type Code
0, // Length
// Aggregator
192, // Attr. Flags
7, // Attr. Type Code
2, // Length
0, 200, // Aggregator ASN = 200
// NLRI
24, 8, 8, 8, // 8.8.8.0/24
22, 185, 65, 240, // 185.65.240.0/22
},
},
}
for _, test := range tests {
res, err := test.msg.SerializeUpdate()
if err != nil {
if test.wantFail {
continue
}
t.Errorf("Unexpected failure for test %q: %v", test.name, err)
continue
}
if test.wantFail {
t.Errorf("Unexpected success for test %q", test.name)
continue
}
assert.Equal(t, test.expected, res)
}
}
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func TestParseASPathStr(t *testing.T) {
tests := []struct {
name string
input string
wantFail bool
expected *PathAttribute
}{
{
name: "Simple AS_SEQUENCE",
input: "3320 15169",
wantFail: false,
expected: &PathAttribute{
TypeCode: ASPathAttr,
Value: ASPath{
ASPathSegment{
Type: ASSequence,
ASNs: []uint32{3320, 15169},
},
},
},
},
{
name: "AS_SEQUENCE with more than 255 elements",
input: "123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123 123",
wantFail: false,
expected: &PathAttribute{
TypeCode: ASPathAttr,
Value: ASPath{
ASPathSegment{
Type: ASSequence,
ASNs: []uint32{123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, 123},
},
ASPathSegment{
Type: ASSequence,
ASNs: []uint32{123, 123, 123, 123, 123},
},
},
},
},
{
name: "AS_SET only",
input: "(3320 201701 15169)",
wantFail: false,
expected: &PathAttribute{
TypeCode: ASPathAttr,
Value: ASPath{
ASPathSegment{
Type: ASSet,
ASNs: []uint32{3320, 201701, 15169},
},
},
},
},
{
name: "Mixed AS Path",
input: "199714 51324 (3320 201701 15169)",
wantFail: false,
expected: &PathAttribute{
TypeCode: ASPathAttr,
Value: ASPath{
ASPathSegment{
Type: ASSequence,
ASNs: []uint32{199714, 51324},
},
ASPathSegment{
Type: ASSet,
ASNs: []uint32{3320, 201701, 15169},
},
},
},
},
}
for _, test := range tests {
res, err := ParseASPathStr(test.input)
if err != nil {
if test.wantFail {
continue
}
t.Errorf("Unexpected failure for test %q: %v", test.name, err)
continue
}
if test.wantFail {
t.Errorf("Unexpected success for test %q", test.name)
continue
}
assert.Equal(t, test.expected, res)
}
}
func TestFourBytesToUint32(t *testing.T) {
tests := []struct {
name string
input [4]byte
expected uint32
}{
{
name: "Test #1",
input: [4]byte{0, 0, 0, 200},
expected: 200,
},
{
name: "Test #2",
input: [4]byte{1, 0, 0, 200},
expected: 16777416,
},
}
for _, test := range tests {
res := fourBytesToUint32(test.input)
if res != test.expected {
t.Errorf("Unexpected result for test %q: Got: %d Want: %d", test.name, res, test.expected)
}
}
}