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bnet "github.com/bio-routing/bio-rd/net"
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"github.com/stretchr/testify/assert"
"github.com/taktv6/tflow2/convert"
)
type test struct {
testNum int
input []byte
wantFail bool
expected interface{}
}
type decodeFunc func(*bytes.Buffer) (interface{}, error)
func BenchmarkDecodeUpdateMsg(b *testing.B) {
input := []byte{0, 5, 8, 10, 16, 192, 168,
0, 53, // Total Path Attribute Length
255, // Attribute flags
1, // Attribute Type code (ORIGIN)
0, 1, // Length
2, // INCOMPLETE
0, // Attribute flags
2, // Attribute Type code (AS Path)
12, // Length
2, // Type = AS_SEQUENCE
2, // Path Segement Length
59, 65, // AS15169
12, 248, // AS3320
1, // Type = AS_SET
2, // Path Segement Length
59, 65, // AS15169
12, 248, // AS3320
0, // Attribute flags
3, // Attribute Type code (Next Hop)
4, // Length
10, 11, 12, 13, // Next Hop
0, // Attribute flags
4, // Attribute Type code (MED)
4, // Length
0, 0, 1, 0, // MED 256
0, // Attribute flags
5, // Attribute Type code (Local Pref)
4, // Length
0, 0, 1, 0, // Local Pref 256
0, // Attribute flags
6, // Attribute Type code (Atomic Aggregate)
0, // Length
0, // Attribute flags
7, // Attribute Type code (Atomic Aggregate)
6, // Length
1, 2, // ASN
10, 11, 12, 13, // Address
8, 11, // 11.0.0.0/8
}
for i := 0; i < b.N; i++ {
buf := bytes.NewBuffer(input)
_, err := decodeUpdateMsg(buf, uint16(len(input)), &DecodeOptions{})
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if err != nil {
fmt.Printf("decodeUpdateMsg failed: %v\n", err)
}
//buf.Next(1)
}
}
func TestDecode(t *testing.T) {
tests := []test{
{
// Proper packet
testNum: 1,
input: []byte{
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, // Marker
0, 19, // Length
4, // Type = Keepalive
},
wantFail: false,
expected: &BGPMessage{
Header: &BGPHeader{
Length: 19,
Type: 4,
},
},
},
{
// Invalid marker
testNum: 2,
input: []byte{
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, // Marker
0, 19, // Length
4, // Type = Keepalive
},
wantFail: true,
expected: &BGPMessage{
Header: &BGPHeader{
Length: 19,
Type: 4,
},
},
},
{
// Proper NOTIFICATION packet
testNum: 3,
input: []byte{
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, // Marker
0, 21, // Length
3, // Type = Notification
1, 1, // Message Header Error, Connection Not Synchronized.
},
wantFail: false,
expected: &BGPMessage{
Header: &BGPHeader{
Length: 21,
Type: 3,
},
Body: &BGPNotification{
ErrorCode: 1,
ErrorSubcode: 1,
},
},
},
{
// Proper OPEN packet
testNum: 4,
input: []byte{
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, // Marker
0, 29, // Length
1, // Type = Open
4, // Version
0, 200, //ASN,
0, 15, // Holdtime
10, 20, 30, 40, // BGP Identifier
0, // Opt Parm Len
},
wantFail: false,
expected: &BGPMessage{
Header: &BGPHeader{
Length: 29,
Type: 1,
},
Body: &BGPOpen{
Version: 4,
HoldTime: 15,
BGPIdentifier: uint32(169090600),
OptParmLen: 0,
OptParams: []OptParam{},
},
},
},
{
// Incomplete OPEN packet
testNum: 5,
input: []byte{
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, // Marker
0, 28, // Length
1, // Type = Open
4, // Version
0, 200, //ASN,
0, 15, // Holdtime
0, 0, 0, 100, // BGP Identifier
},
wantFail: true,
expected: &BGPMessage{
Header: &BGPHeader{
Length: 28,
Type: 1,
},
Body: &BGPOpen{
Version: 4,
0, 5, 8, 10, 16, 192, 168, 0, 0, // 2 withdraws
},
wantFail: false,
expected: &BGPMessage{
Header: &BGPHeader{
Length: 28,
Type: 2,
},
Body: &BGPUpdate{
WithdrawnRoutesLen: 5,
WithdrawnRoutes: &NLRI{
IP: bnet.IPv4FromOctets(10, 0, 0, 0),
IP: bnet.IPv4FromOctets(192, 168, 0, 0),
Pfxlen: 16,
},
},
},
},
},
{
testNum: 7,
input: []byte{
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, // Marker
0, 28, // Length
5, // Type = Invalid
0, 5, 8, 10, 16, 192, 168, 0, 0, // Some more stuff
},
wantFail: true,
},
{
testNum: 8,
input: []byte{
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
0, 21,
3,
6, 4,
},
wantFail: false,
expected: &BGPMessage{
Header: &BGPHeader{
Length: 21,
Type: 3,
},
Body: &BGPNotification{
ErrorCode: 6,
ErrorSubcode: 4,
},
},
},
}
for _, test := range tests {
buf := bytes.NewBuffer(test.input)
msg, err := Decode(buf, &DecodeOptions{})
if err != nil && !test.wantFail {
t.Errorf("Unexpected error in test %d: %v", test.testNum, err)
continue
}
if err == nil && test.wantFail {
t.Errorf("Expected error did not happen in test %d", test.testNum)
continue
}
if err != nil && test.wantFail {
continue
}
if msg == nil {
t.Errorf("Unexpected nil result in test %d. Expected: %v", test.testNum, test.expected)
continue
}
assert.Equalf(t, test.expected, msg, "Test: %d", test.testNum)
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}
}
func TestDecodeNotificationMsg(t *testing.T) {
tests := []struct {
name string
input []byte
wantFail bool
expected interface{}
}{
{
name: "Invalid error code",
input: []byte{0, 0},
wantFail: true,
},
{
name: "Invalid error code #2",
input: []byte{7, 0},
wantFail: true,
},
{
name: "Invalid ErrSubCode (Header)",
input: []byte{1, 0},
wantFail: true,
},
{
name: "Invalid ErrSubCode (Header) #2",
input: []byte{1, 4},
wantFail: true,
},
{
name: "Invalid ErrSubCode (Open)",
input: []byte{2, 0},
wantFail: true,
},
{
name: "Invalid ErrSubCode (Open) #2",
input: []byte{2, 7},
wantFail: true,
},
{
name: "Invalid ErrSubCode (Open) #3",
input: []byte{2, 5},
wantFail: true,
},
{
name: "Invalid ErrSubCode (Update)",
input: []byte{3, 0},
wantFail: true,
},
{
name: "Invalid ErrSubCode (Update) #2",
input: []byte{3, 12},
wantFail: true,
},
{
name: "Invalid ErrSubCode (Update) #3",
input: []byte{3, 7},
wantFail: true,
},
{
name: "Valid Notification",
input: []byte{2, 2},
wantFail: false,
expected: &BGPNotification{
ErrorCode: 2,
ErrorSubcode: 2,
},
},
{
name: "Empty input",
input: []byte{},
wantFail: true,
},
{
name: "Hold Timer Expired",
input: []byte{4, 0},
wantFail: false,
expected: &BGPNotification{
ErrorCode: 4,
ErrorSubcode: 0,
},
},
{
name: "Hold Timer Expired (invalid subcode)",
input: []byte{4, 1},
wantFail: true,
},
{
name: "FSM Error",
input: []byte{5, 0},
wantFail: false,
expected: &BGPNotification{
ErrorCode: 5,
ErrorSubcode: 0,
},
},
{
name: "FSM Error (invalid subcode)",
input: []byte{5, 1},
wantFail: true,
},
{
name: "Cease",
input: []byte{6, 0},
wantFail: false,
expected: &BGPNotification{
ErrorCode: 6,
ErrorSubcode: 0,
},
},
{
name: "Cease (invalid subcode)",
input: []byte{6, 1},
wantFail: true,
},
}
for _, test := range tests {
res, err := decodeNotificationMsg(bytes.NewBuffer(test.input))
if test.wantFail {
if err != nil {
continue
}
t.Errorf("Expected error did not happen for test %q", test.name)
continue
}
if err != nil {
t.Errorf("Unexpected failure for test %q: %v", test.name, err)
continue
}
assert.Equal(t, test.expected, res)
}
}
func TestDecodeUpdateMsg(t *testing.T) {
tests := []struct {
testNum int
input []byte
explicitLength uint16
wantFail bool
expected interface{}
}{
{
// 2 withdraws only, valid update
testNum: 1,
input: []byte{0, 5, 8, 10, 16, 192, 168, 0, 0},
wantFail: false,
expected: &BGPUpdate{
WithdrawnRoutesLen: 5,
WithdrawnRoutes: &NLRI{
IP: bnet.IPv4FromOctets(10, 0, 0, 0),
IP: bnet.IPv4FromOctets(192, 168, 0, 0),
Pfxlen: 16,
},
},
},
},
{
// 2 withdraws with one path attribute (ORIGIN), valid update
testNum: 2,
input: []byte{
0, 5, // Withdrawn Routes Length
8, 10, // 10.0.0.0/8
16, 192, 168, // 192.168.0.0/16
0, 5, // Total Path Attribute Length
255, // Attribute flags
1, // Attribute Type code
0, 1, // Length
2, // INCOMPLETE
},
wantFail: false,
expected: &BGPUpdate{
WithdrawnRoutesLen: 5,
WithdrawnRoutes: &NLRI{
IP: bnet.IPv4FromOctets(10, 0, 0, 0),
IP: bnet.IPv4FromOctets(192, 168, 0, 0),
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Pfxlen: 16,
},
},
TotalPathAttrLen: 5,
PathAttributes: &PathAttribute{
Optional: true,
Transitive: true,
Partial: true,
ExtendedLength: true,
Length: 1,
TypeCode: 1,
Value: uint8(2),
},
},
},
{
// 2 withdraws with two path attributes (ORIGIN + ASPath), valid update
testNum: 3,
input: []byte{0, 5, 8, 10, 16, 192, 168,
0, 14, // Total Path Attribute Length
255, // Attribute flags
1, // Attribute Type code (ORIGIN)
0, 1, // Length
2, // INCOMPLETE
0, // Attribute flags
2, // Attribute Type code (AS Path)
6, // Length
2, // Type = AS_SEQUENCE
2, // Path Segement Length
59, 65, // AS15169
12, 248, // AS3320
},
wantFail: false,
expected: &BGPUpdate{
WithdrawnRoutesLen: 5,
WithdrawnRoutes: &NLRI{
IP: bnet.IPv4FromOctets(10, 0, 0, 0),
IP: bnet.IPv4FromOctets(192, 168, 0, 0),
Pfxlen: 16,
},
},
TotalPathAttrLen: 14,
PathAttributes: &PathAttribute{
Optional: true,
Transitive: true,
Partial: true,
ExtendedLength: true,
Length: 1,
TypeCode: 1,
Value: uint8(2),
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 6,
TypeCode: 2,
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ASNs: []uint32{
15169,
3320,
},
},
},
},
},
},
},
{
// 2 withdraws with two path attributes (ORIGIN + ASPath), invalid AS Path segment type
testNum: 4,
input: []byte{0, 5, 8, 10, 16, 192, 168,
0, 13, // Total Path Attribute Length
255, // Attribute flags
1, // Attribute Type code (ORIGIN)
0, 1, // Length
2, // INCOMPLETE
0, // Attribute flags
2, // Attribute Type code (AS Path)
6, // Length
1, // Type = AS_SET
0, // Path Segement Length
},
wantFail: true,
},
{
// 2 withdraws with two path attributes (ORIGIN + ASPath), invalid AS Path segment member count
testNum: 5,
input: []byte{0, 5, 8, 10, 16, 192, 168,
0, 13, // Total Path Attribute Length
255, // Attribute flags
1, // Attribute Type code (ORIGIN)
0, 1, // Length
2, // INCOMPLETE
0, // Attribute flags
2, // Attribute Type code (AS Path)
6, // Length
3, // Type = INVALID
2, // Path Segement Length
59, 65, // AS15169
12, 248, // AS3320
},
wantFail: true,
},
{
// 2 withdraws with two path attributes (ORIGIN + ASPath), valid update
testNum: 6,
input: []byte{0, 5, 8, 10, 16, 192, 168,
0, 20, // Total Path Attribute Length
255, // Attribute flags
1, // Attribute Type code (ORIGIN)
0, 1, // Length
2, // INCOMPLETE
0, // Attribute flags
2, // Attribute Type code (AS Path)
12, // Length
2, // Type = AS_SEQUENCE
2, // Path Segement Length
59, 65, // AS15169
12, 248, // AS3320
1, // Type = AS_SET
2, // Path Segement Length
59, 65, // AS15169
12, 248, // AS3320
},
wantFail: false,
expected: &BGPUpdate{
WithdrawnRoutesLen: 5,
WithdrawnRoutes: &NLRI{
IP: bnet.IPv4FromOctets(10, 0, 0, 0),
IP: bnet.IPv4FromOctets(192, 168, 0, 0),
Pfxlen: 16,
},
},
TotalPathAttrLen: 20,
PathAttributes: &PathAttribute{
Optional: true,
Transitive: true,
Partial: true,
ExtendedLength: true,
Length: 1,
TypeCode: 1,
Value: uint8(2),
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 12,
TypeCode: 2,
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ASNs: []uint32{
15169,
3320,
},
},
},
},
},
},
},
{
// 2 withdraws with 3 path attributes (ORIGIN + ASPath, NH), valid update
testNum: 7,
input: []byte{0, 5, 8, 10, 16, 192, 168,
0, 27, // Total Path Attribute Length
255, // Attribute flags
1, // Attribute Type code (ORIGIN)
0, 1, // Length
2, // INCOMPLETE
0, // Attribute flags
2, // Attribute Type code (AS Path)
12, // Length
2, // Type = AS_SEQUENCE
2, // Path Segement Length
59, 65, // AS15169
12, 248, // AS3320
1, // Type = AS_SET
2, // Path Segement Length
59, 65, // AS15169
12, 248, // AS3320
0, // Attribute flags
3, // Attribute Type code (Next Hop)
4, // Length
10, 11, 12, 13, // Next Hop
},
wantFail: false,
expected: &BGPUpdate{
WithdrawnRoutesLen: 5,
WithdrawnRoutes: &NLRI{
IP: bnet.IPv4FromOctets(10, 0, 0, 0),
IP: bnet.IPv4FromOctets(192, 168, 0, 0),
Pfxlen: 16,
},
},
TotalPathAttrLen: 27,
PathAttributes: &PathAttribute{
Optional: true,
Transitive: true,
Partial: true,
ExtendedLength: true,
Length: 1,
TypeCode: 1,
Value: uint8(2),
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 12,
TypeCode: 2,
ASNs: []uint32{
15169,
3320,
},
},
},
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 4,
TypeCode: 3,
Value: bnet.IPv4FromOctets(10, 11, 12, 13),
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},
},
},
},
{
// 2 withdraws with 4 path attributes (ORIGIN + ASPath, NH, MED), valid update
testNum: 8,
input: []byte{0, 5, 8, 10, 16, 192, 168,
0, 34, // Total Path Attribute Length
255, // Attribute flags
1, // Attribute Type code (ORIGIN)
0, 1, // Length
2, // INCOMPLETE
0, // Attribute flags
2, // Attribute Type code (AS Path)
12, // Length
2, // Type = AS_SEQUENCE
2, // Path Segement Length
59, 65, // AS15169
12, 248, // AS3320
1, // Type = AS_SET
2, // Path Segement Length
59, 65, // AS15169
12, 248, // AS3320
0, // Attribute flags
3, // Attribute Type code (Next Hop)
4, // Length
10, 11, 12, 13, // Next Hop
0, // Attribute flags
4, // Attribute Type code (Next Hop)
4, // Length
0, 0, 1, 0, // MED 256
},
wantFail: false,
expected: &BGPUpdate{
WithdrawnRoutesLen: 5,
WithdrawnRoutes: &NLRI{
IP: bnet.IPv4FromOctets(10, 0, 0, 0),
IP: bnet.IPv4FromOctets(192, 168, 0, 0),
Pfxlen: 16,
},
},
TotalPathAttrLen: 34,
PathAttributes: &PathAttribute{
Optional: true,
Transitive: true,
Partial: true,
ExtendedLength: true,
Length: 1,
TypeCode: 1,
Value: uint8(2),
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 12,
TypeCode: 2,
ASNs: []uint32{
15169,
3320,
},
},
},
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 4,
TypeCode: 3,
Value: bnet.IPv4FromOctets(10, 11, 12, 13),
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Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 4,
TypeCode: 4,
Value: uint32(256),
},
},
},
},
},
},
{
// 2 withdraws with 4 path attributes (ORIGIN + ASPath, NH, MED, Local Pref), valid update
testNum: 9,
input: []byte{0, 5, 8, 10, 16, 192, 168,
0, 41, // Total Path Attribute Length
255, // Attribute flags
1, // Attribute Type code (ORIGIN)
0, 1, // Length
2, // INCOMPLETE
0, // Attribute flags
2, // Attribute Type code (AS Path)
12, // Length
2, // Type = AS_SEQUENCE
2, // Path Segement Length
59, 65, // AS15169
12, 248, // AS3320
1, // Type = AS_SET
2, // Path Segement Length
59, 65, // AS15169
12, 248, // AS3320
0, // Attribute flags
3, // Attribute Type code (Next Hop)
4, // Length
10, 11, 12, 13, // Next Hop
0, // Attribute flags
4, // Attribute Type code (MED)
4, // Length
0, 0, 1, 0, // MED 256
0, // Attribute flags
5, // Attribute Type code (Local Pref)
4, // Length
0, 0, 1, 0, // Local Pref 256
},
wantFail: false,
expected: &BGPUpdate{
WithdrawnRoutesLen: 5,
WithdrawnRoutes: &NLRI{
IP: bnet.IPv4FromOctets(10, 0, 0, 0),
IP: bnet.IPv4FromOctets(192, 168, 0, 0),
Pfxlen: 16,
},
},
TotalPathAttrLen: 41,
PathAttributes: &PathAttribute{
Optional: true,
Transitive: true,
Partial: true,
ExtendedLength: true,
Length: 1,
TypeCode: 1,
Value: uint8(2),
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 12,
TypeCode: 2,
ASNs: []uint32{
15169,
3320,
},
},
},
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 4,
TypeCode: 3,
Value: bnet.IPv4FromOctets(10, 11, 12, 13),
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
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944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
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970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 4,
TypeCode: 4,
Value: uint32(256),
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 4,
TypeCode: 5,
Value: uint32(256),
},
},
},
},
},
},
},
{
// 2 withdraws with 6 path attributes (ORIGIN, ASPath, NH, MED, Local Pref, Atomi Aggregate), valid update
testNum: 9,
input: []byte{0, 5, 8, 10, 16, 192, 168,
0, 44, // Total Path Attribute Length
255, // Attribute flags
1, // Attribute Type code (ORIGIN)
0, 1, // Length
2, // INCOMPLETE
0, // Attribute flags
2, // Attribute Type code (AS Path)
12, // Length
2, // Type = AS_SEQUENCE
2, // Path Segement Length
59, 65, // AS15169
12, 248, // AS3320
1, // Type = AS_SET
2, // Path Segement Length
59, 65, // AS15169
12, 248, // AS3320
0, // Attribute flags
3, // Attribute Type code (Next Hop)
4, // Length
10, 11, 12, 13, // Next Hop
0, // Attribute flags
4, // Attribute Type code (MED)
4, // Length
0, 0, 1, 0, // MED 256
0, // Attribute flags
5, // Attribute Type code (Local Pref)
4, // Length
0, 0, 1, 0, // Local Pref 256
0, // Attribute flags
6, // Attribute Type code (Atomic Aggregate)
0, // Length
},
wantFail: false,
expected: &BGPUpdate{
WithdrawnRoutesLen: 5,
WithdrawnRoutes: &NLRI{
IP: bnet.IPv4FromOctets(10, 0, 0, 0),
IP: bnet.IPv4FromOctets(192, 168, 0, 0),
Pfxlen: 16,
},
},
TotalPathAttrLen: 44,
PathAttributes: &PathAttribute{
Optional: true,
Transitive: true,
Partial: true,
ExtendedLength: true,
Length: 1,
TypeCode: 1,
Value: uint8(2),
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 12,
TypeCode: 2,
ASNs: []uint32{
15169,
3320,
},
},
},
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 4,
TypeCode: 3,
Value: bnet.IPv4FromOctets(10, 11, 12, 13),
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1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 4,
TypeCode: 4,
Value: uint32(256),
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 4,
TypeCode: 5,
Value: uint32(256),
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 0,
TypeCode: 6,
},
},
},
},
},
},
},
},
{
// 2 withdraws with 7 path attributes (ORIGIN, ASPath, NH, MED, Local Pref, Atomic Aggregate), valid update
testNum: 10,
input: []byte{0, 5, 8, 10, 16, 192, 168,
0, 53, // Total Path Attribute Length
255, // Attribute flags
1, // Attribute Type code (ORIGIN)
0, 1, // Length
2, // INCOMPLETE
0, // Attribute flags
2, // Attribute Type code (AS Path)
12, // Length
2, // Type = AS_SEQUENCE
2, // Path Segement Length
59, 65, // AS15169
12, 248, // AS3320
1, // Type = AS_SET
2, // Path Segement Length
59, 65, // AS15169
12, 248, // AS3320
0, // Attribute flags
3, // Attribute Type code (Next Hop)
4, // Length
10, 11, 12, 13, // Next Hop
0, // Attribute flags
4, // Attribute Type code (MED)
4, // Length
0, 0, 1, 0, // MED 256
0, // Attribute flags
5, // Attribute Type code (Local Pref)
4, // Length
0, 0, 1, 0, // Local Pref 256
0, // Attribute flags
6, // Attribute Type code (Atomic Aggregate)
0, // Length
0, // Attribute flags
7, // Attribute Type code (Atomic Aggregate)
6, // Length
1, 2, // ASN
10, 11, 12, 13, // Address
8, 11, // 11.0.0.0/8
},
wantFail: false,
expected: &BGPUpdate{
WithdrawnRoutesLen: 5,
WithdrawnRoutes: &NLRI{
IP: bnet.IPv4FromOctets(10, 0, 0, 0),
IP: bnet.IPv4FromOctets(192, 168, 0, 0),
Pfxlen: 16,
},
},
TotalPathAttrLen: 53,
PathAttributes: &PathAttribute{
Optional: true,
Transitive: true,
Partial: true,
ExtendedLength: true,
Length: 1,
TypeCode: 1,
Value: uint8(2),
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 12,
TypeCode: 2,
ASNs: []uint32{
15169,
3320,
},
},
},
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 4,
TypeCode: 3,
Value: bnet.IPv4FromOctets(10, 11, 12, 13),
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1170
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1176
1177
1178
1179
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1181
1182
1183
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1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 4,
TypeCode: 4,
Value: uint32(256),
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 4,
TypeCode: 5,
Value: uint32(256),
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 0,
TypeCode: 6,
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 6,
TypeCode: 7,
Value: types.Aggregator{
ASN: uint16(258),
Address: bnet.IPv4FromOctets(10, 11, 12, 13).ToUint32(),
},
},
},
},
},
},
},
},
NLRI: &NLRI{
Pfxlen: 8,
IP: bnet.IPv4FromOctets(11, 0, 0, 0),
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1223
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1231
1232
1233
1234
1235
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1245
1246
1247
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1251
},
},
},
{
testNum: 11, // Incomplete Withdraw
input: []byte{
0, 5, // Length
},
wantFail: true,
},
{
testNum: 12, // Empty buffer
input: []byte{},
wantFail: true,
},
{
testNum: 13,
input: []byte{
0, 0, // No Withdraws
0, 5, // Total Path Attributes Length
},
wantFail: true,
},
{
testNum: 14,
input: []byte{
0, 0, // No Withdraws
0, 0, // Total Path Attributes Length
24, // Incomplete NLRI
},
wantFail: true,
},
{
testNum: 15, // Cut at Total Path Attributes Length
input: []byte{
0, 0, // No Withdraws
},
explicitLength: 5,
wantFail: true,
},
{
// Unknown attribute
testNum: 16,
input: []byte{
0, 0, // No Withdraws
0, 7, // Total Path Attributes Length
64, 111, 4, 1, 1, 1, 1, // Unknown attribute
},
wantFail: false,
expected: &BGPUpdate{
TotalPathAttrLen: 7,
PathAttributes: &PathAttribute{
Length: 4,
Transitive: true,
TypeCode: 111,
Value: []byte{1, 1, 1, 1},
},
},
},
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1282
1283
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1285
1286
1287
1288
1289
1290
1291
1292
{
// 2 withdraws with two path attributes (Communities + Origin), valid update
testNum: 17,
input: []byte{0, 5, 8, 10, 16, 192, 168,
0, 16, // Total Path Attribute Length
0, // Attribute flags
8, // Attribute Type code (Community)
8, // Length
0, 0, 1, 0, // Arbitrary Community
0, 0, 1, 1, // Arbitrary Community
255, // Attribute flags
1, // Attribute Type code (ORIGIN)
0, 1, // Length
2, // INCOMPLETE
},
wantFail: false,
expected: &BGPUpdate{
WithdrawnRoutesLen: 5,
WithdrawnRoutes: &NLRI{
IP: bnet.IPv4FromOctets(10, 0, 0, 0),
IP: bnet.IPv4FromOctets(192, 168, 0, 0),
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1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
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1345
1346
1347
1348
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1351
1352
1353
1354
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1356
1357
1358
Pfxlen: 16,
},
},
TotalPathAttrLen: 16,
PathAttributes: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 8,
TypeCode: 8,
Value: []uint32{256, 257},
Next: &PathAttribute{
Optional: true,
Transitive: true,
Partial: true,
ExtendedLength: true,
Length: 1,
TypeCode: 1,
Value: uint8(2),
},
},
},
},
{
// 2 withdraws with two path attributes (ORIGIN + Community), invalid update (too short community)
testNum: 18,
input: []byte{0, 5, 8, 10, 16, 192, 168,
0, 11, // Total Path Attribute Length
255, // Attribute flags
1, // Attribute Type code (ORIGIN)
0, 1, // Length
2, // INCOMPLETE
0, // Attribute flags
8, // Attribute Type code (Community)
3, // Length
0, 0, 1, // Arbitrary Community
},
wantFail: true,
expected: nil,
},
{
// 2 withdraws with two path attributes (ORIGIN + Community), invalid update (too long community)
testNum: 19,
input: []byte{0, 5, 8, 10, 16, 192, 168,
0, 13, // Total Path Attribute Length
255, // Attribute flags
1, // Attribute Type code (ORIGIN)
0, 1, // Length
2, // INCOMPLETE
0, // Attribute flags
8, // Attribute Type code (Community)
5, // Length
0, 0, 1, 0, 1, // Arbitrary Community
},
wantFail: true,
expected: nil,
},
t.Run(strconv.Itoa(test.testNum), func(t *testing.T) {
buf := bytes.NewBuffer(test.input)
l := test.explicitLength
if l == 0 {
l = uint16(len(test.input))
}
msg, err := decodeUpdateMsg(buf, l, &DecodeOptions{})
if err != nil && !test.wantFail {
t.Fatalf("Unexpected error in test %d: %v", test.testNum, err)
}
if err == nil && test.wantFail {
t.Fatalf("Expected error did not happen in test %d", test.testNum)
}
if err != nil && test.wantFail {
return
}
assert.Equalf(t, test.expected, msg, "%d", test.testNum)
})
}
}
func TestDecodeMsgBody(t *testing.T) {
tests := []struct {
name string
buffer *bytes.Buffer
msgType uint8
length uint16
wantFail bool
expected interface{}
}{
{
name: "Unknown msgType",
msgType: 5,
wantFail: true,
},
}
for _, test := range tests {
res, err := decodeMsgBody(test.buffer, test.msgType, test.length, &DecodeOptions{})
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1427
if test.wantFail && err == nil {
t.Errorf("Expected error dit not happen in test %q", test.name)
}
if !test.wantFail && err != nil {
t.Errorf("Unexpected error in test %q: %v", test.name, err)
}
assert.Equal(t, test.expected, res)
}
}
func TestDecodeOpenMsg(t *testing.T) {
tests := []test{
{
// Valid message
testNum: 1,
input: []byte{4, 1, 1, 0, 15, 10, 20, 30, 40, 0},
wantFail: false,
expected: &BGPOpen{
Version: 4,
OptParams: make([]OptParam, 0),
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1444
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1463
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1466
1467
1468
1469
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1471
1472
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1474
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1479
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1481
1482
1483
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1487
1488
1489
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1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
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1543
1544
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1546
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1552
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1560
1561
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1563
1564
1565
1566
1567
1568
1569
1570
1571
},
},
{
// Invalid Version
testNum: 2,
input: []byte{3, 1, 1, 0, 15, 10, 10, 10, 11, 0},
wantFail: true,
},
}
genericTest(_decodeOpenMsg, tests, t)
}
func TestDecodeHeader(t *testing.T) {
tests := []test{
{
// Valid header
testNum: 1,
input: []byte{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 0, 19, KeepaliveMsg},
wantFail: false,
expected: &BGPHeader{
Length: 19,
Type: KeepaliveMsg,
},
},
{
// Invalid length too short
testNum: 2,
input: []byte{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 0, 18, KeepaliveMsg},
wantFail: true,
expected: &BGPHeader{
Length: 18,
Type: KeepaliveMsg,
},
},
{
// Invalid length too long
testNum: 3,
input: []byte{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 16, 1, KeepaliveMsg},
wantFail: true,
expected: &BGPHeader{
Length: 18,
Type: KeepaliveMsg,
},
},
{
// Invalid message type 5
testNum: 4,
input: []byte{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 0, 19, 5},
wantFail: true,
expected: &BGPHeader{
Length: 19,
Type: KeepaliveMsg,
},
},
{
// Invalid message type 0
testNum: 5,
input: []byte{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 0, 19, 0},
wantFail: true,
expected: &BGPHeader{
Length: 19,
Type: KeepaliveMsg,
},
},
{
// Invalid marker
testNum: 6,
input: []byte{1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 19, KeepaliveMsg},
wantFail: true,
expected: &BGPHeader{
Length: 19,
Type: KeepaliveMsg,
},
},
{
// Incomplete Marker
testNum: 7,
input: []byte{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
wantFail: true,
},
{
// Incomplete Header
testNum: 8,
input: []byte{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 0, 19},
wantFail: true,
},
{
// Empty input
testNum: 9,
input: []byte{},
wantFail: true,
},
}
for _, test := range tests {
buf := bytes.NewBuffer(test.input)
res, err := decodeHeader(buf)
if err != nil {
if test.wantFail {
continue
}
t.Errorf("Unexpected failure for test %d: %v", test.testNum, err)
continue
}
if test.wantFail {
t.Errorf("Unexpected success fo test %d", test.testNum)
}
assert.Equal(t, test.expected, res)
}
}
func genericTest(f decodeFunc, tests []test, t *testing.T) {
for _, test := range tests {
buf := bytes.NewBuffer(test.input)
msg, err := f(buf)
if err != nil && !test.wantFail {
t.Errorf("Unexpected error in test %d: %v", test.testNum, err)
continue
}
if err == nil && test.wantFail {
t.Errorf("Expected error did not happen in test %d", test.testNum)
continue
}
if err != nil && test.wantFail {
continue
}
if msg == nil {
t.Errorf("Unexpected nil result in test %d. Expected: %v", test.testNum, test.expected)
continue
}
assert.Equalf(t, test.expected, msg, "%d", test.testNum)
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1581
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1600
1601
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1603
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1605
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1610
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1612
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1614
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1648
1649
1650
1651
1652
1653
1654
}
}
func TestIsValidIdentifier(t *testing.T) {
tests := []struct {
name string
input uint32
expected bool
}{
{
name: "Valid #1",
input: convert.Uint32b([]byte{8, 8, 8, 8}),
expected: true,
},
{
name: "Multicast",
input: convert.Uint32b([]byte{239, 8, 8, 8}),
expected: false,
},
{
name: "Loopback",
input: convert.Uint32b([]byte{127, 8, 8, 8}),
expected: false,
},
{
name: "First byte 0",
input: convert.Uint32b([]byte{0, 8, 8, 8}),
expected: false,
},
{
name: "All bytes 255",
input: convert.Uint32b([]byte{255, 255, 255, 255}),
expected: false,
},
}
for _, test := range tests {
res := isValidIdentifier(test.input)
assert.Equal(t, test.expected, res)
}
}
func TestValidateOpenMessage(t *testing.T) {
tests := []struct {
name string
input *BGPOpen
wantFail bool
}{
{
name: "Valid #1",
input: &BGPOpen{
Version: 4,
BGPIdentifier: convert.Uint32b([]byte{8, 8, 8, 8}),
},
wantFail: false,
},
{
name: "Invalid Identifier",
input: &BGPOpen{
Version: 4,
BGPIdentifier: convert.Uint32b([]byte{0, 8, 8, 8}),
},
wantFail: true,
},
}
for _, test := range tests {
res := validateOpen(test.input)
if res != nil {
if test.wantFail {
continue
}
t.Errorf("Unexpected failure for test %q: %v", test.name, res)
continue
}
if test.wantFail {
t.Errorf("Unexpected success for test %q", test.name)
}
}
}
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func TestDecodeOptParams(t *testing.T) {
tests := []struct {
name string
input []byte
wantFail bool
expected []OptParam
}{
{
name: "Add path capability",
input: []byte{
2, // Type
6, // Length
69, // Code
4, // Length
0, 1, // AFI
1, // SAFI
3, // Send/Receive
},
wantFail: false,
expected: []OptParam{
{
Type: 2,
Length: 6,
Value: Capabilities{
{
Code: 69,
Length: 4,
Value: AddPathCapability{
AFI: 1,
SAFI: 1,
SendReceive: 3,
},
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},
},
},
},
},
}
for _, test := range tests {
buf := bytes.NewBuffer(test.input)
res, err := decodeOptParams(buf, uint8(len(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 TestDecodeCapability(t *testing.T) {
tests := []struct {
name string
input []byte
expected Capability
wantFail bool
}{
{
name: "Add Path",
input: []byte{69, 4, 0, 1, 1, 3},
expected: Capability{
Code: 69,
Length: 4,
Value: AddPathCapability{
AFI: 1,
SAFI: 1,
SendReceive: 3,
},
},
wantFail: false,
},
{
name: "MP Capability (IPv6)",
input: []byte{1, 4, 0, 2, 0, 1},
expected: Capability{
Code: MultiProtocolCapabilityCode,
Length: 4,
Value: MultiProtocolCapability{
AFI: IPv6AFI,
SAFI: UnicastSAFI,
},
},
wantFail: false,
},
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{
name: "Fail",
input: []byte{69, 4, 0, 1},
wantFail: true,
},
}
for _, test := range tests {
cap, err := decodeCapability(bytes.NewBuffer(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", err)
continue
}
assert.Equal(t, test.expected, cap)
}
}
func TestDecodeAddPathCapability(t *testing.T) {
tests := []struct {
name string
input []byte
expected AddPathCapability
wantFail bool
}{
{
name: "ok",
input: []byte{0, 1, 1, 3},
wantFail: false,
expected: AddPathCapability{
AFI: 1,
SAFI: 1,
SendReceive: 3,
},
},
{
name: "Incomplete",
input: []byte{0, 1, 1},
wantFail: true,
},
}
for _, test := range tests {
buf := bytes.NewBuffer(test.input)
cap, err := decodeAddPathCapability(buf)
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, cap)
}
}