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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)), &Options{})
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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,
HoldTime: 15,
BGPIdentifier: uint32(100),
},
},
},
{
testNum: 6,
input: []byte{
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, // Marker
0, 28, // Length
2, // Type = Update
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{
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, &Options{})
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{
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{
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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{
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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,
Value: ASPath{
{
Type: 2,
Count: 2,
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{
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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,
Value: ASPath{
{
Type: 2,
Count: 2,
ASNs: []uint32{
15169,
3320,
},
},
{
Type: 1,
Count: 2,
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{
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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,
Value: ASPath{
{
Type: 2,
Count: 2,
ASNs: []uint32{
15169,
3320,
},
},
{
Type: 1,
Count: 2,
ASNs: []uint32{
15169,
3320,
},
},
},
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 4,
TypeCode: 3,
Value: strAddr("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{
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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,
Value: ASPath{
{
Type: 2,
Count: 2,
ASNs: []uint32{
15169,
3320,
},
},
{
Type: 1,
Count: 2,
ASNs: []uint32{
15169,
3320,
},
},
},
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 4,
TypeCode: 3,
Value: strAddr("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{
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
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,
Value: ASPath{
{
Type: 2,
Count: 2,
ASNs: []uint32{
15169,
3320,
},
},
{
Type: 1,
Count: 2,
ASNs: []uint32{
15169,
3320,
},
},
},
Next: &PathAttribute{
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
Length: 4,
TypeCode: 3,
Value: strAddr("10.11.12.13"),
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
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
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
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{