Newer
Older
package packet
import (
"bytes"
"testing"
"github.com/stretchr/testify/assert"
)
func TestDecodePathAttrs(t *testing.T) {
tests := []struct {
name string
input []byte
wantFail bool
expected *PathAttribute
}{
{
name: "Valid attribute set",
input: []byte{
0, // Attr. Flags
1, // Attr. Type Code
1, // Attr. Length
1, // EGP
0, // Attr. Flags
3, // Next Hop
4, // Attr. Length
10, 20, 30, 40, // IP-Address
},
wantFail: false,
expected: &PathAttribute{
TypeCode: 1,
Length: 1,
Value: uint8(1),
Next: &PathAttribute{
TypeCode: 3,
Length: 4,
Value: strAddr("10.20.30.40"),
},
},
},
{
name: "Incomplete data",
input: []byte{
0, // Attr. Flags
1, // Attr. Type Code
1, // Attr. Length
},
wantFail: true,
},
}
for _, test := range tests {
res, err := decodePathAttrs(bytes.NewBuffer(test.input), uint16(len(test.input)), &Options{})
if test.wantFail && err == nil {
t.Errorf("Expected error did not happen for test %q", test.name)
continue
}
if !test.wantFail && err != nil {
t.Errorf("Unexpected failure for test %q: %v", test.name, err)
continue
}
assert.Equalf(t, test.expected, res, "%s", test.name)
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
}
}
func TestDecodePathAttr(t *testing.T) {
tests := []struct {
name string
input []byte
wantFail bool
expected *PathAttribute
}{
{
name: "Valid origin",
input: []byte{
0, // Attr. Flags
1, // Attr. Type Code
1, // Attr. Length
1, // EGP
},
wantFail: false,
expected: &PathAttribute{
Length: 1,
Optional: false,
Transitive: false,
Partial: false,
ExtendedLength: false,
TypeCode: OriginAttr,
Value: uint8(1),
},
},
{
name: "Missing TypeCode",
input: []byte{
0, // Attr. Flags
},
wantFail: true,
},
{
name: "Missing Length",
input: []byte{
0, // Attr. Flags
1, // Attr. Type Code
},
wantFail: true,
},
{
name: "Missing Value ORIGIN",
input: []byte{
0, // Attr. Flags
1, // Attr. Type Code
1, // Attr. Length
},
wantFail: true,
},
{
name: "Missing value AS_PATH",
input: []byte{
0, // Attr. Flags
2, // Attr. Type Code
8, // Attr. Length
},
wantFail: true,
},
{
name: "Missing value NextHop",
input: []byte{
0, // Attr. Flags
3, // Attr. Type Code
4, // Attr. Length
},
wantFail: true,
},
{
name: "Missing value MED",
input: []byte{
0, // Attr. Flags
4, // Attr. Type Code
4, // Attr. Length
},
wantFail: true,
},
{
name: "Missing value LocalPref",
input: []byte{
0, // Attr. Flags
5, // Attr. Type Code
4, // Attr. Length
},
wantFail: true,
},
{
name: "Missing value AGGREGATOR",
input: []byte{
0, // Attr. Flags
7, // Attr. Type Code
4, // Attr. Length
},
wantFail: true,
},
{
name: "Not supported attribute",
input: []byte{
0, // Attr. Flags
111, // Attr. Type Code
4, // Attr. Length
},
wantFail: true,
},
}
for _, test := range tests {
res, _, err := decodePathAttr(bytes.NewBuffer(test.input), &Options{})
if test.wantFail && err == nil {
t.Errorf("Expected error did not happen for test %q", test.name)
continue
}
if !test.wantFail && err != nil {
t.Errorf("Unexpected failure for test %q: %v", test.name, err)
continue
}
assert.Equal(t, test.expected, res)
}
}
func TestDecodeOrigin(t *testing.T) {
tests := []struct {
name string
input []byte
wantFail bool
expected *PathAttribute
}{
{
name: "Test #1",
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
input: []byte{
0, // Origin: IGP
},
wantFail: false,
expected: &PathAttribute{
Value: uint8(IGP),
Length: 1,
},
},
{
name: "Test #2",
input: []byte{
1, // Origin: EGP
},
wantFail: false,
expected: &PathAttribute{
Value: uint8(EGP),
Length: 1,
},
},
{
name: "Test #3",
input: []byte{
2, // Origin: INCOMPLETE
},
wantFail: false,
expected: &PathAttribute{
Value: uint8(INCOMPLETE),
Length: 1,
},
},
{
name: "Test #4",
input: []byte{},
wantFail: true,
},
}
for _, test := range tests {
pa := &PathAttribute{
Length: uint16(len(test.input)),
}
err := pa.decodeOrigin(bytes.NewBuffer(test.input))
if test.wantFail && err == nil {
t.Errorf("Expected error did not happen for test %q", test.name)
}
if !test.wantFail && err != nil {
t.Errorf("Unexpected failure for test %q: %v", test.name, err)
}
if err != nil {
continue
}
assert.Equal(t, test.expected, pa)
}
}
func TestDecodeASPath(t *testing.T) {
tests := []struct {
name string
input []byte
wantFail bool
explicitLength uint16
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
expected *PathAttribute
}{
{
name: "Test #1",
input: []byte{
2, // AS_SEQUENCE
4, // Path Length
0, 100, 0, 200, 0, 222, 0, 240,
},
wantFail: false,
expected: &PathAttribute{
Length: 10,
Value: ASPath{
ASPathSegment{
Type: 2,
Count: 4,
ASNs: []uint32{
100, 200, 222, 240,
},
},
},
},
},
{
name: "Test #2",
input: []byte{
1, // AS_SEQUENCE
3, // Path Length
0, 100, 0, 222, 0, 240,
},
wantFail: false,
expected: &PathAttribute{
Length: 8,
Value: ASPath{
ASPathSegment{
Type: 1,
Count: 3,
ASNs: []uint32{
100, 222, 240,
},
},
},
},
},
{
name: "32 bit ASNs in AS_PATH",
input: []byte{
1, // AS_SEQUENCE
3, // Path Length
0, 0, 0, 100, 0, 0, 0, 222, 0, 0, 0, 240,
},
wantFail: false,
use4OctetASNs: true,
expected: &PathAttribute{
Length: 14,
Value: ASPath{
ASPathSegment{
Type: 1,
Count: 3,
ASNs: []uint32{
100, 222, 240,
},
},
},
},
},
{
name: "Empty input",
input: []byte{},
explicitLength: 5,
wantFail: true,
},
{
name: "Incomplete AS_PATH",
input: []byte{
1, // AS_SEQUENCE
3, // Path Length
0, 100, 0, 222,
},
wantFail: true,
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
l := uint16(len(test.input))
if test.explicitLength != 0 {
l = test.explicitLength
}
pa := &PathAttribute{
Length: l,
}
asnLength := uint8(2)
if test.use4OctetASNs {
asnLength = 4
}
err := pa.decodeASPath(bytes.NewBuffer(test.input), asnLength)
if test.wantFail && err == nil {
t.Errorf("Expected error did not happen for test %q", test.name)
}
if !test.wantFail && err != nil {
t.Errorf("Unexpected failure for test %q: %v", test.name, err)
}
if err != nil {
return
}
assert.Equal(t, test.expected, pa)
})
}
}
func TestDecodeNextHop(t *testing.T) {
tests := []struct {
name string
input []byte
wantFail bool
explicitLength uint16
expected *PathAttribute
}{
{
name: "Test #1",
input: []byte{
10, 20, 30, 40,
},
wantFail: false,
expected: &PathAttribute{
Length: 4,
Value: strAddr("10.20.30.40"),
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
},
},
{
name: "Test #2",
input: []byte{},
explicitLength: 5,
wantFail: true,
},
{
name: "Incomplete IP-Address",
input: []byte{10, 20, 30},
explicitLength: 5,
wantFail: true,
},
}
for _, test := range tests {
l := uint16(len(test.input))
if test.explicitLength != 0 {
l = test.explicitLength
}
pa := &PathAttribute{
Length: l,
}
err := pa.decodeNextHop(bytes.NewBuffer(test.input))
if test.wantFail && err == nil {
t.Errorf("Expected error did not happen for test %q", test.name)
}
if !test.wantFail && err != nil {
t.Errorf("Unexpected failure for test %q: %v", test.name, err)
}
if err != nil {
continue
}
assert.Equal(t, test.expected, pa)
}
}
func TestDecodeMED(t *testing.T) {
tests := []struct {
name string
input []byte
wantFail bool
explicitLength uint16
expected *PathAttribute
}{
{
name: "Test #1",
input: []byte{
0, 0, 3, 232,
},
wantFail: false,
expected: &PathAttribute{
Length: 4,
Value: uint32(1000),
},
},
{
name: "Test #2",
input: []byte{},
explicitLength: 5,
wantFail: true,
},
}
for _, test := range tests {
l := uint16(len(test.input))
if test.explicitLength != 0 {
l = test.explicitLength
}
pa := &PathAttribute{
Length: l,
}
err := pa.decodeMED(bytes.NewBuffer(test.input))
if test.wantFail && err == nil {
t.Errorf("Expected error did not happen for test %q", test.name)
}
if !test.wantFail && err != nil {
t.Errorf("Unexpected failure for test %q: %v", test.name, err)
}
if err != nil {
continue
}
assert.Equal(t, test.expected, pa)
}
}
func TestDecodeLocalPref(t *testing.T) {
tests := []struct {
name string
input []byte
wantFail bool
explicitLength uint16
expected *PathAttribute
}{
{
name: "Test #1",
input: []byte{
0, 0, 3, 232,
},
wantFail: false,
expected: &PathAttribute{
Length: 4,
Value: uint32(1000),
},
},
{
name: "Test #2",
input: []byte{},
explicitLength: 5,
wantFail: true,
},
}
for _, test := range tests {
l := uint16(len(test.input))
if test.explicitLength != 0 {
l = test.explicitLength
}
pa := &PathAttribute{
Length: l,
}
err := pa.decodeLocalPref(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, pa)
}
}
func TestDecodeAggregator(t *testing.T) {
tests := []struct {
name string
input []byte
wantFail bool
explicitLength uint16
expected *PathAttribute
}{
{
name: "Valid aggregator",
input: []byte{
0, 222, // ASN
10, 20, 30, 40, // Aggregator IP
},
wantFail: false,
expected: &PathAttribute{
Length: 6,
Value: Aggretator{
ASN: 222,
Addr: strAddr("10.20.30.40"),
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
},
},
},
{
name: "Incomplete Address",
input: []byte{
0, 222, // ASN
10, 20, // Aggregator IP
},
wantFail: true,
},
{
name: "Missing Address",
input: []byte{
0, 222, // ASN
},
wantFail: true,
},
{
name: "Empty input",
input: []byte{},
wantFail: true,
},
}
for _, test := range tests {
l := uint16(len(test.input))
if test.explicitLength != 0 {
l = test.explicitLength
}
pa := &PathAttribute{
Length: l,
}
err := pa.decodeAggregator(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, pa)
}
}
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
func TestDecodeLargeCommunity(t *testing.T) {
tests := []struct {
name string
input []byte
wantFail bool
explicitLength uint16
expected *PathAttribute
}{
{
name: "two valid large communities",
input: []byte{
0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 3, 0, 0, 0, 4, 0, 0, 0, 5, 0, 0, 0, 6, // (1, 2, 3), (4, 5, 6)
},
wantFail: false,
expected: &PathAttribute{
Length: 24,
Value: []LargeCommunity{
{
GlobalAdministrator: 1,
DataPart1: 2,
DataPart2: 3,
},
{
GlobalAdministrator: 4,
DataPart1: 5,
DataPart2: 6,
},
},
},
},
{
name: "Empty input",
input: []byte{},
wantFail: false,
expected: &PathAttribute{
Length: 0,
Value: []LargeCommunity{},
},
},
}
for _, test := range tests {
l := uint16(len(test.input))
if test.explicitLength != 0 {
l = test.explicitLength
}
pa := &PathAttribute{
Length: l,
}
err := pa.decodeLargeCommunities(bytes.NewBuffer(test.input))
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
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, pa)
}
}
func TestDecodeCommunity(t *testing.T) {
tests := []struct {
name string
input []byte
wantFail bool
explicitLength uint16
expected *PathAttribute
}{
{
name: "two valid communities",
input: []byte{
0, 2, 0, 8, 1, 0, 4, 1, // (2,8), (256,1025)
},
wantFail: false,
expected: &PathAttribute{
Length: 8,
Value: []uint32{
},
},
},
{
name: "Empty input",
input: []byte{},
wantFail: false,
expected: &PathAttribute{
Length: 0,
Value: []uint32{},
},
},
}
for _, test := range tests {
l := uint16(len(test.input))
if test.explicitLength != 0 {
l = test.explicitLength
}
pa := &PathAttribute{
Length: l,
}
err := pa.decodeCommunities(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, pa)
}
}
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
func TestSetLength(t *testing.T) {
tests := []struct {
name string
input []byte
ExtendedLength bool
wantFail bool
expected *PathAttribute
expectedConsumed int
}{
{
name: "Valid input",
ExtendedLength: false,
input: []byte{22},
expected: &PathAttribute{
ExtendedLength: false,
Length: 22,
},
expectedConsumed: 1,
},
{
name: "Valid input (extended)",
ExtendedLength: true,
input: []byte{1, 1},
expected: &PathAttribute{
ExtendedLength: true,
Length: 257,
},
expectedConsumed: 2,
},
{
name: "Invalid input",
ExtendedLength: true,
input: []byte{},
wantFail: true,
},
{
name: "Invalid input (extended)",
ExtendedLength: true,
input: []byte{1},
wantFail: true,
},
}
for _, test := range tests {
pa := &PathAttribute{
ExtendedLength: test.ExtendedLength,
}
consumed, err := pa.setLength(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, pa)
assert.Equal(t, test.expectedConsumed, consumed)
}
}
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
tests := []struct {
name string
input []byte
wantFail bool
explicitLength uint16
expected uint32
}{
{
name: "Valid input",
input: []byte{0, 0, 1, 1},
expected: 257,
},
{
name: "Valid input with additional crap",
input: []byte{0, 0, 1, 1, 200},
expected: 257,
},
{
name: "Valid input with additional crap and invalid length",
input: []byte{0, 0, 1, 1, 200},
explicitLength: 8,
wantFail: true,
},
{
name: "Invalid input",
input: []byte{0, 0, 1},
wantFail: true,
},
}
for _, test := range tests {
l := uint16(len(test.input))
if test.explicitLength > 0 {
l = test.explicitLength
}
pa := &PathAttribute{
Length: l,
}
err := pa.decodeUint32(bytes.NewBuffer(test.input), "test")
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, pa.Value)
875
876
877
878
879
880
881
882
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
927
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
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
func TestSetOptional(t *testing.T) {
tests := []struct {
name string
input uint8
expected uint8
}{
{
name: "Test #1",
input: 0,
expected: 128,
},
}
for _, test := range tests {
res := setOptional(test.input)
if res != test.expected {
t.Errorf("Unexpected result for test %q: %d", test.name, res)
}
}
}
func TestSetTransitive(t *testing.T) {
tests := []struct {
name string
input uint8
expected uint8
}{
{
name: "Test #1",
input: 0,
expected: 64,
},
}
for _, test := range tests {
res := setTransitive(test.input)
if res != test.expected {
t.Errorf("Unexpected result for test %q: %d", test.name, res)
}
}
}
func TestSetPartial(t *testing.T) {
tests := []struct {
name string
input uint8
expected uint8
}{
{
name: "Test #1",
input: 0,
expected: 32,
},
}
for _, test := range tests {
res := setPartial(test.input)
if res != test.expected {
t.Errorf("Unexpected result for test %q: %d", test.name, res)
}
}
}
func TestSetExtendedLength(t *testing.T) {
tests := []struct {
name string
input uint8
expected uint8
}{
{
name: "Test #1",
input: 0,
expected: 16,
},
}
for _, test := range tests {
res := setExtendedLength(test.input)
if res != test.expected {
t.Errorf("Unexpected result for test %q: %d", test.name, res)
}
}
}
func TestSerializeOrigin(t *testing.T) {
tests := []struct {
name string
input *PathAttribute
expected []byte
expectedLen uint8
}{
{
name: "Test #1",
input: &PathAttribute{
TypeCode: OriginAttr,
Value: uint8(0), // IGP
},
expectedLen: 4,
expected: []byte{64, 1, 1, 0},
},
{
name: "Test #2",
input: &PathAttribute{
TypeCode: OriginAttr,
Value: uint8(2), // INCOMPLETE
},
expectedLen: 4,
expected: []byte{64, 1, 1, 2},
},
}
for _, test := range tests {
buf := bytes.NewBuffer(nil)
n := test.input.serializeOrigin(buf)
if test.expectedLen != n {
t.Errorf("Unexpected length for test %q: %d", test.name, n)
continue
}
assert.Equal(t, test.expected, buf.Bytes())
}
}
func TestSerializeNextHop(t *testing.T) {
tests := []struct {
name string
input *PathAttribute
expected []byte
expectedLen uint8
}{
{
name: "Test #1",
input: &PathAttribute{
TypeCode: NextHopAttr,
Value: strAddr("100.110.120.130"),
expected: []byte{64, 3, 4, 100, 110, 120, 130},
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
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
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
expectedLen: 7,
},
}
for _, test := range tests {
buf := bytes.NewBuffer(nil)
n := test.input.serializeNextHop(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 TestSerializeMED(t *testing.T) {
tests := []struct {
name string
input *PathAttribute
expected []byte
expectedLen uint8
}{
{
name: "Test #1",
input: &PathAttribute{
TypeCode: MEDAttr,
Value: uint32(1000),
},
expected: []byte{
128, // Attribute flags
4, // Type
4, // Length
0, 0, 3, 232, // Value = 1000
},
expectedLen: 7,
},
}
for _, test := range tests {
buf := bytes.NewBuffer(nil)
n := test.input.serializeMED(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 TestSerializeLocalPref(t *testing.T) {
tests := []struct {
name string
input *PathAttribute
expected []byte
expectedLen uint8
}{
{
name: "Test #1",
input: &PathAttribute{
TypeCode: LocalPrefAttr,
Value: uint32(1000),
},
expected: []byte{
64, // Attribute flags
5, // Type
4, // Length
0, 0, 3, 232, // Value = 1000
},
expectedLen: 7,
},
}
for _, test := range tests {
buf := bytes.NewBuffer(nil)
n := test.input.serializeLocalpref(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 TestSerializeAtomicAggregate(t *testing.T) {
tests := []struct {
name string
input *PathAttribute
expected []byte
expectedLen uint8
}{
{
name: "Test #1",
input: &PathAttribute{
TypeCode: AtomicAggrAttr,
},
expected: []byte{
64, // Attribute flags
6, // Type
0, // Length
},
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
2, // AS_SEQUENCE
3, // ASN count
0, 100, // ASN 100
0, 200, // ASN 200
0, 210, // ASN 210
},
expectedLen: 10,
},
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
{
name: "32bit ASN",
input: &PathAttribute{
TypeCode: ASPathAttr,
Value: ASPath{
{
Type: 2, // Sequence
ASNs: []uint32{
100, 200, 210,
},
},
},
},
expected: []byte{
64, // Attribute flags
2, // Type
14, // Length
2, // AS_SEQUENCE
3, // ASN count
0, 0, 0, 100, // ASN 100
0, 0, 0, 200, // ASN 200
0, 0, 0, 210, // ASN 210
},
expectedLen: 16,
use32BitASN: true,
},
t.Run(test.name, func(t *testing.T) {
buf := bytes.NewBuffer(nil)
Supports4OctetASN: test.use32BitASN,
}
n := test.input.serializeASPath(buf, opt)
if n != test.expectedLen {
t.Fatalf("Unexpected length for test %q: %d", test.name, n)
}
assert.Equal(t, test.expected, buf.Bytes())
})
func TestSerializeLargeCommunities(t *testing.T) {
tests := []struct {
name string
input *PathAttribute
expected []byte
expectedLen uint8
}{
{
name: "2 large communities",
input: &PathAttribute{
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
Value: []LargeCommunity{
{
GlobalAdministrator: 1,
DataPart1: 2,
DataPart2: 3,
},
{
GlobalAdministrator: 4,
DataPart1: 5,
DataPart2: 6,
},
},
},
expected: []byte{
0xe0, // Attribute flags
32, // Type
24, // Length
0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 3, 0, 0, 0, 4, 0, 0, 0, 5, 0, 0, 0, 6, // Communities (1, 2, 3), (4, 5, 6)
},
expectedLen: 24,
},
{
name: "empty list of communities",
input: &PathAttribute{
Value: []LargeCommunity{},
},
expected: []byte{},
expectedLen: 0,
},
}
for _, test := range tests {
t.Run(test.name, func(te *testing.T) {
buf := bytes.NewBuffer([]byte{})
n := test.input.serializeLargeCommunities(buf)
if n != test.expectedLen {
t.Fatalf("Unexpected length for test %q: %d", test.name, n)
}
assert.Equal(t, test.expected, buf.Bytes())
})
}
}
func TestSerializeCommunities(t *testing.T) {
tests := []struct {
name string
input *PathAttribute
expected []byte
expectedLen uint8
}{
{
name: "2 communities",
input: &PathAttribute{
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
1344
1345
1346
1347
Value: []uint32{
131080, 16778241,
},
},
expected: []byte{
0xe0, // Attribute flags
8, // Type
8, // Length
0, 2, 0, 8, 1, 0, 4, 1, // Communities (2,8), (256,1025)
},
expectedLen: 8,
},
{
name: "empty list of communities",
input: &PathAttribute{
TypeCode: CommunitiesAttr,
Value: []uint32{},
},
expected: []byte{},
expectedLen: 0,
},
}
for _, test := range tests {
t.Run(test.name, func(te *testing.T) {
buf := bytes.NewBuffer([]byte{})
n := test.input.serializeCommunities(buf)
if n != test.expectedLen {
t.Fatalf("Unexpected length for test %q: %d", test.name, n)
}
assert.Equal(t, test.expected, buf.Bytes())
})
}
}
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
func TestSerializeUnknownAttribute(t *testing.T) {
tests := []struct {
name string
input *PathAttribute
expected []byte
expectedLen uint8
}{
{
name: "Arbritary attribute",
input: &PathAttribute{
TypeCode: 200,
Value: []byte{1, 2, 3, 4},
Transitive: true,
},
expected: []byte{
64, // Attribute flags
200, // Type
4, // Length
1, 2, 3, 4, // Payload
},
expectedLen: 6,
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
buf := bytes.NewBuffer(nil)
n := test.input.serializeUnknownAttribute(buf)
assert.Equal(t, test.expectedLen, n)
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{
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{
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
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{
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: strAddr("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{
Pfxlen: 22,
},
},
},
expected: []byte{
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0, 86, // Length
2, // Msg Type
// Withdraws
0, 5, // Withdrawn Routes Length
8, 10, // Withdraw 10/8
16, 192, 168, // Withdraw 192.168/16
0, 50, // Total Path Attribute Length
// ORIGIN
64, // Attr. Flags
1, // Attr. Type Code
1, // Length
0, // Value
// ASPath
64, // Attr. Flags
2, // Attr. Type Code
14, // Attr. Length
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
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 {
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
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.Equalf(t, test.expected, res, "%s", test.name)
}
}
func TestSerializeAddPath(t *testing.T) {
tests := []struct {
name string
msg *BGPUpdateAddPath
expected []byte
wantFail bool
}{
{
name: "Withdraw only",
msg: &BGPUpdateAddPath{
WithdrawnRoutes: &NLRIAddPath{
PathIdentifier: 257,
IP: strAddr("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, 31, // Length
2, // Msg Type
0, 8, // Withdrawn Routes Length
0, 0, 1, 1, // Path Identifier
24, 100, 110, 120, // NLRI
0, 0, // Total Path Attribute Length
},
},
{
name: "NLRI only",
msg: &BGPUpdateAddPath{
NLRI: &NLRIAddPath{
PathIdentifier: 257,
IP: strAddr("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, 31, // Length
2, // Msg Type
0, 0, // Withdrawn Routes Length
0, 0, // Total Path Attribute Length
0, 0, 1, 1, // Path Identifier
17, 100, 110, 128, // NLRI
},
},
{
name: "Path Attributes only",
msg: &BGPUpdateAddPath{
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: &BGPUpdateAddPath{
WithdrawnRoutes: &NLRIAddPath{
IP: strAddr("10.0.0.0"),
Pfxlen: 8,
Next: &NLRIAddPath{
IP: strAddr("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: strAddr("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: &NLRIAddPath{
IP: strAddr("8.8.8.0"),
Pfxlen: 24,
Next: &NLRIAddPath{
IP: strAddr("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, 102, // Length
2, // Msg Type
// Withdraws
0, 13, // Withdrawn Routes Length
0, 0, 0, 0, // Path Identifier
8, 10, // Withdraw 10/8
0, 0, 0, 0, // Path Identifier
16, 192, 168, // Withdraw 192.168/16
0, 50, // Total Path Attribute Length
// ORIGIN
64, // Attr. Flags
1, // Attr. Type Code
1, // Length
0, // Value
// ASPath
64, // Attr. Flags
2, // Attr. Type Code
14, // Attr. Length
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
0, 0, 0, 0, // Path Identifier
24, 8, 8, 8, // 8.8.8.0/24
0, 0, 0, 0, // Path Identifier
22, 185, 65, 240, // 185.65.240.0/22
},
},
}
for _, test := range tests {
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.Equalf(t, test.expected, res, "%s", test.name)
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
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)
}
}
}