summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/net/mptcp/mptcp_join.sh
blob: 2eeaf4aca644deccd995a074c0bbd3fe5ba660a5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
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
267
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
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
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
570
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
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
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
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
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
817
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
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
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
1009
1010
1011
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
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
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
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
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
1344
1345
1346
1347
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
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
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
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
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
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
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
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
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
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0

# Double quotes to prevent globbing and word splitting is recommended in new
# code but we accept it, especially because there were too many before having
# address all other issues detected by shellcheck.
#shellcheck disable=SC2086

ret=0
sin=""
sinfail=""
sout=""
cin=""
cinfail=""
cinsent=""
cout=""
capout=""
ns1=""
ns2=""
ksft_skip=4
timeout_poll=30
timeout_test=$((timeout_poll * 2 + 1))
capture=0
checksum=0
ip_mptcp=0
check_invert=0
validate_checksum=0
init=0

declare -A all_tests
declare -a only_tests_ids
declare -a only_tests_names
declare -A failed_tests
TEST_COUNT=0
TEST_NAME=""
nr_blank=40

export FAILING_LINKS=""

# generated using "nfbpf_compile '(ip && (ip[54] & 0xf0) == 0x30) ||
#				  (ip6 && (ip6[74] & 0xf0) == 0x30)'"
CBPF_MPTCP_SUBOPTION_ADD_ADDR="14,
			       48 0 0 0,
			       84 0 0 240,
			       21 0 3 64,
			       48 0 0 54,
			       84 0 0 240,
			       21 6 7 48,
			       48 0 0 0,
			       84 0 0 240,
			       21 0 4 96,
			       48 0 0 74,
			       84 0 0 240,
			       21 0 1 48,
			       6 0 0 65535,
			       6 0 0 0"

init_partial()
{
	capout=$(mktemp)

	local rndh
	rndh=$(mktemp -u XXXXXX)

	ns1="ns1-$rndh"
	ns2="ns2-$rndh"

	local netns
	for netns in "$ns1" "$ns2"; do
		ip netns add $netns || exit $ksft_skip
		ip -net $netns link set lo up
		ip netns exec $netns sysctl -q net.mptcp.enabled=1
		ip netns exec $netns sysctl -q net.mptcp.pm_type=0
		ip netns exec $netns sysctl -q net.ipv4.conf.all.rp_filter=0
		ip netns exec $netns sysctl -q net.ipv4.conf.default.rp_filter=0
		if [ $checksum -eq 1 ]; then
			ip netns exec $netns sysctl -q net.mptcp.checksum_enabled=1
		fi
	done

	check_invert=0
	validate_checksum=$checksum
	FAILING_LINKS=""

	#  ns1         ns2
	# ns1eth1    ns2eth1
	# ns1eth2    ns2eth2
	# ns1eth3    ns2eth3
	# ns1eth4    ns2eth4

	local i
	for i in $(seq 1 4); do
		ip link add ns1eth$i netns "$ns1" type veth peer name ns2eth$i netns "$ns2"
		ip -net "$ns1" addr add 10.0.$i.1/24 dev ns1eth$i
		ip -net "$ns1" addr add dead:beef:$i::1/64 dev ns1eth$i nodad
		ip -net "$ns1" link set ns1eth$i up

		ip -net "$ns2" addr add 10.0.$i.2/24 dev ns2eth$i
		ip -net "$ns2" addr add dead:beef:$i::2/64 dev ns2eth$i nodad
		ip -net "$ns2" link set ns2eth$i up

		# let $ns2 reach any $ns1 address from any interface
		ip -net "$ns2" route add default via 10.0.$i.1 dev ns2eth$i metric 10$i
		ip -net "$ns2" route add default via dead:beef:$i::1 dev ns2eth$i metric 10$i
	done
}

init_shapers()
{
	local i
	for i in $(seq 1 4); do
		tc -n $ns1 qdisc add dev ns1eth$i root netem rate 20mbit delay 1
		tc -n $ns2 qdisc add dev ns2eth$i root netem rate 20mbit delay 1
	done
}

cleanup_partial()
{
	rm -f "$capout"

	local netns
	for netns in "$ns1" "$ns2"; do
		ip netns del $netns
		rm -f /tmp/$netns.{nstat,out}
	done
}

check_tools()
{
	if ! ip -Version &> /dev/null; then
		echo "SKIP: Could not run test without ip tool"
		exit $ksft_skip
	fi

	if ! iptables -V &> /dev/null; then
		echo "SKIP: Could not run all tests without iptables tool"
		exit $ksft_skip
	fi

	if ! ip6tables -V &> /dev/null; then
		echo "SKIP: Could not run all tests without ip6tables tool"
		exit $ksft_skip
	fi
}

init() {
	init=1

	check_tools

	sin=$(mktemp)
	sout=$(mktemp)
	cin=$(mktemp)
	cinsent=$(mktemp)
	cout=$(mktemp)

	trap cleanup EXIT

	make_file "$cin" "client" 1
	make_file "$sin" "server" 1
}

cleanup()
{
	rm -f "$cin" "$cout" "$sinfail"
	rm -f "$sin" "$sout" "$cinsent" "$cinfail"
	cleanup_partial
}

skip_test()
{
	if [ "${#only_tests_ids[@]}" -eq 0 ] && [ "${#only_tests_names[@]}" -eq 0 ]; then
		return 1
	fi

	local i
	for i in "${only_tests_ids[@]}"; do
		if [ "${TEST_COUNT}" -eq "${i}" ]; then
			return 1
		fi
	done
	for i in "${only_tests_names[@]}"; do
		if [ "${TEST_NAME}" = "${i}" ]; then
			return 1
		fi
	done

	return 0
}

# $1: test name
reset()
{
	TEST_NAME="${1}"

	TEST_COUNT=$((TEST_COUNT+1))

	if skip_test; then
		return 1
	fi

	if [ "${init}" != "1" ]; then
		init
	else
		cleanup_partial
	fi

	init_partial

	return 0
}

# $1: test name
reset_with_cookies()
{
	reset "${1}" || return 1

	local netns
	for netns in "$ns1" "$ns2"; do
		ip netns exec $netns sysctl -q net.ipv4.tcp_syncookies=2
	done
}

# $1: test name
reset_with_add_addr_timeout()
{
	local ip="${2:-4}"
	local tables

	reset "${1}" || return 1

	tables="iptables"
	if [ $ip -eq 6 ]; then
		tables="ip6tables"
	fi

	ip netns exec $ns1 sysctl -q net.mptcp.add_addr_timeout=1
	ip netns exec $ns2 $tables -A OUTPUT -p tcp \
		-m tcp --tcp-option 30 \
		-m bpf --bytecode \
		"$CBPF_MPTCP_SUBOPTION_ADD_ADDR" \
		-j DROP
}

# $1: test name
reset_with_checksum()
{
	local ns1_enable=$1
	local ns2_enable=$2

	reset "checksum test ${1} ${2}" || return 1

	ip netns exec $ns1 sysctl -q net.mptcp.checksum_enabled=$ns1_enable
	ip netns exec $ns2 sysctl -q net.mptcp.checksum_enabled=$ns2_enable

	validate_checksum=1
}

reset_with_allow_join_id0()
{
	local ns1_enable=$2
	local ns2_enable=$3

	reset "${1}" || return 1

	ip netns exec $ns1 sysctl -q net.mptcp.allow_join_initial_addr_port=$ns1_enable
	ip netns exec $ns2 sysctl -q net.mptcp.allow_join_initial_addr_port=$ns2_enable
}

# Modify TCP payload without corrupting the TCP packet
#
# This rule inverts a 8-bit word at byte offset 148 for the 2nd TCP ACK packets
# carrying enough data.
# Once it is done, the TCP Checksum field is updated so the packet is still
# considered as valid at the TCP level.
# Because the MPTCP checksum, covering the TCP options and data, has not been
# updated, the modification will be detected and an MP_FAIL will be emitted:
# what we want to validate here without corrupting "random" MPTCP options.
#
# To avoid having tc producing this pr_info() message for each TCP ACK packets
# not carrying enough data:
#
#     tc action pedit offset 162 out of bounds
#
# Netfilter is used to mark packets with enough data.
reset_with_fail()
{
	reset "${1}" || return 1

	ip netns exec $ns1 sysctl -q net.mptcp.checksum_enabled=1
	ip netns exec $ns2 sysctl -q net.mptcp.checksum_enabled=1

	check_invert=1
	validate_checksum=1
	local i="$2"
	local ip="${3:-4}"
	local tables

	tables="iptables"
	if [ $ip -eq 6 ]; then
		tables="ip6tables"
	fi

	ip netns exec $ns2 $tables \
		-t mangle \
		-A OUTPUT \
		-o ns2eth$i \
		-p tcp \
		-m length --length 150:9999 \
		-m statistic --mode nth --packet 1 --every 99999 \
		-j MARK --set-mark 42 || exit 1

	tc -n $ns2 qdisc add dev ns2eth$i clsact || exit 1
	tc -n $ns2 filter add dev ns2eth$i egress \
		protocol ip prio 1000 \
		handle 42 fw \
		action pedit munge offset 148 u8 invert \
		pipe csum tcp \
		index 100 || exit 1
}

fail_test()
{
	ret=1
	failed_tests[${TEST_COUNT}]="${TEST_NAME}"
}

get_failed_tests_ids()
{
	# sorted
	local i
	for i in "${!failed_tests[@]}"; do
		echo "${i}"
	done | sort -n
}

print_file_err()
{
	ls -l "$1" 1>&2
	echo "Trailing bytes are: "
	tail -c 27 "$1"
}

check_transfer()
{
	local in=$1
	local out=$2
	local what=$3
	local bytes=$4
	local i a b

	local line
	if [ -n "$bytes" ]; then
		# when truncating we must check the size explicitly
		local out_size=$(wc -c $out | awk '{print $1}')
		if [ $out_size -ne $bytes ]; then
			echo "[ FAIL ] $what output file has wrong size ($out_size, $bytes)"
			fail_test
			return 1
		fi
		bytes="--bytes=${bytes}"
	fi
	cmp -l "$in" "$out" ${bytes} | while read -r i a b; do
		local sum=$((0${a} + 0${b}))
		if [ $check_invert -eq 0 ] || [ $sum -ne $((0xff)) ]; then
			echo "[ FAIL ] $what does not match (in, out):"
			print_file_err "$in"
			print_file_err "$out"
			fail_test

			return 1
		else
			echo "$what has inverted byte at ${i}"
		fi
	done

	return 0
}

do_ping()
{
	local listener_ns="$1"
	local connector_ns="$2"
	local connect_addr="$3"

	if ! ip netns exec ${connector_ns} ping -q -c 1 $connect_addr >/dev/null; then
		echo "$listener_ns -> $connect_addr connectivity [ FAIL ]" 1>&2
		fail_test
	fi
}

link_failure()
{
	local ns="$1"

	if [ -z "$FAILING_LINKS" ]; then
		l=$((RANDOM%4))
		FAILING_LINKS=$((l+1))
	fi

	local l
	for l in $FAILING_LINKS; do
		local veth="ns1eth$l"
		ip -net "$ns" link set "$veth" down
	done
}

# $1: IP address
is_v6()
{
	[ -z "${1##*:*}" ]
}

# $1: ns, $2: port
wait_local_port_listen()
{
	local listener_ns="${1}"
	local port="${2}"

	local port_hex
	port_hex="$(printf "%04X" "${port}")"

	local i
	for i in $(seq 10); do
		ip netns exec "${listener_ns}" cat /proc/net/tcp* | \
			awk "BEGIN {rc=1} {if (\$2 ~ /:${port_hex}\$/ && \$4 ~ /0A/) {rc=0; exit}} END {exit rc}" &&
			break
		sleep 0.1
	done
}

rm_addr_count()
{
	local ns=${1}

	ip netns exec ${ns} nstat -as | grep MPTcpExtRmAddr | awk '{print $2}'
}

# $1: ns, $2: old rm_addr counter in $ns
wait_rm_addr()
{
	local ns="${1}"
	local old_cnt="${2}"
	local cnt

	local i
	for i in $(seq 10); do
		cnt=$(rm_addr_count ${ns})
		[ "$cnt" = "${old_cnt}" ] || break
		sleep 0.1
	done
}

wait_mpj()
{
	local ns="${1}"
	local cnt old_cnt

	old_cnt=$(ip netns exec ${ns} nstat -as | grep MPJoinAckRx | awk '{print $2}')

	local i
	for i in $(seq 10); do
		cnt=$(ip netns exec ${ns} nstat -as | grep MPJoinAckRx | awk '{print $2}')
		[ "$cnt" = "${old_cnt}" ] || break
		sleep 0.1
	done
}

kill_wait()
{
	kill $1 > /dev/null 2>&1
	wait $1 2>/dev/null
}

pm_nl_set_limits()
{
	local ns=$1
	local addrs=$2
	local subflows=$3

	if [ $ip_mptcp -eq 1 ]; then
		ip -n $ns mptcp limits set add_addr_accepted $addrs subflows $subflows
	else
		ip netns exec $ns ./pm_nl_ctl limits $addrs $subflows
	fi
}

pm_nl_add_endpoint()
{
	local ns=$1
	local addr=$2
	local flags _flags
	local port _port
	local dev _dev
	local id _id
	local nr=2

	local p
	for p in "${@}"
	do
		if [ $p = "flags" ]; then
			eval _flags=\$"$nr"
			[ -n "$_flags" ]; flags="flags $_flags"
		fi
		if [ $p = "dev" ]; then
			eval _dev=\$"$nr"
			[ -n "$_dev" ]; dev="dev $_dev"
		fi
		if [ $p = "id" ]; then
			eval _id=\$"$nr"
			[ -n "$_id" ]; id="id $_id"
		fi
		if [ $p = "port" ]; then
			eval _port=\$"$nr"
			[ -n "$_port" ]; port="port $_port"
		fi

		nr=$((nr + 1))
	done

	if [ $ip_mptcp -eq 1 ]; then
		ip -n $ns mptcp endpoint add $addr ${_flags//","/" "} $dev $id $port
	else
		ip netns exec $ns ./pm_nl_ctl add $addr $flags $dev $id $port
	fi
}

pm_nl_del_endpoint()
{
	local ns=$1
	local id=$2
	local addr=$3

	if [ $ip_mptcp -eq 1 ]; then
		ip -n $ns mptcp endpoint delete id $id $addr
	else
		ip netns exec $ns ./pm_nl_ctl del $id $addr
	fi
}

pm_nl_flush_endpoint()
{
	local ns=$1

	if [ $ip_mptcp -eq 1 ]; then
		ip -n $ns mptcp endpoint flush
	else
		ip netns exec $ns ./pm_nl_ctl flush
	fi
}

pm_nl_show_endpoints()
{
	local ns=$1

	if [ $ip_mptcp -eq 1 ]; then
		ip -n $ns mptcp endpoint show
	else
		ip netns exec $ns ./pm_nl_ctl dump
	fi
}

pm_nl_change_endpoint()
{
	local ns=$1
	local id=$2
	local flags=$3

	if [ $ip_mptcp -eq 1 ]; then
		ip -n $ns mptcp endpoint change id $id ${flags//","/" "}
	else
		ip netns exec $ns ./pm_nl_ctl set id $id flags $flags
	fi
}

pm_nl_check_endpoint()
{
	local line expected_line
	local need_title=$1
	local msg="$2"
	local ns=$3
	local addr=$4
	local _flags=""
	local flags
	local _port
	local port
	local dev
	local _id
	local id

	if [ "${need_title}" = 1 ]; then
		printf "%03u %-36s %s" "${TEST_COUNT}" "${TEST_NAME}" "${msg}"
	else
		printf "%-${nr_blank}s %s" " " "${msg}"
	fi

	shift 4
	while [ -n "$1" ]; do
		if [ $1 = "flags" ]; then
			_flags=$2
			[ -n "$_flags" ]; flags="flags $_flags"
			shift
		elif [ $1 = "dev" ]; then
			[ -n "$2" ]; dev="dev $1"
			shift
		elif [ $1 = "id" ]; then
			_id=$2
			[ -n "$_id" ]; id="id $_id"
			shift
		elif [ $1 = "port" ]; then
			_port=$2
			[ -n "$_port" ]; port=" port $_port"
			shift
		fi

		shift
	done

	if [ -z "$id" ]; then
		echo "[skip] bad test - missing endpoint id"
		return
	fi

	if [ $ip_mptcp -eq 1 ]; then
		line=$(ip -n $ns mptcp endpoint show $id)
		# the dump order is: address id flags port dev
		expected_line="$addr"
		[ -n "$addr" ] && expected_line="$expected_line $addr"
		expected_line="$expected_line $id"
		[ -n "$_flags" ] && expected_line="$expected_line ${_flags//","/" "}"
		[ -n "$dev" ] && expected_line="$expected_line $dev"
		[ -n "$port" ] && expected_line="$expected_line $port"
	else
		line=$(ip netns exec $ns ./pm_nl_ctl get $_id)
		# the dump order is: id flags dev address port
		expected_line="$id"
		[ -n "$flags" ] && expected_line="$expected_line $flags"
		[ -n "$dev" ] && expected_line="$expected_line $dev"
		[ -n "$addr" ] && expected_line="$expected_line $addr"
		[ -n "$_port" ] && expected_line="$expected_line $_port"
	fi
	if [ "$line" = "$expected_line" ]; then
		echo "[ ok ]"
	else
		echo "[fail] expected '$expected_line' found '$line'"
		fail_test
	fi
}

filter_tcp_from()
{
	local ns="${1}"
	local src="${2}"
	local target="${3}"

	ip netns exec "${ns}" iptables -A INPUT -s "${src}" -p tcp -j "${target}"
}

do_transfer()
{
	local listener_ns="$1"
	local connector_ns="$2"
	local cl_proto="$3"
	local srv_proto="$4"
	local connect_addr="$5"
	local test_link_fail="$6"
	local addr_nr_ns1="$7"
	local addr_nr_ns2="$8"
	local speed="$9"
	local sflags="${10}"

	local port=$((10000 + TEST_COUNT - 1))
	local cappid
	local userspace_pm=0
	local evts_ns1
	local evts_ns1_pid
	local evts_ns2
	local evts_ns2_pid

	:> "$cout"
	:> "$sout"
	:> "$capout"

	if [ $capture -eq 1 ]; then
		local capuser
		if [ -z $SUDO_USER ] ; then
			capuser=""
		else
			capuser="-Z $SUDO_USER"
		fi

		capfile=$(printf "mp_join-%02u-%s.pcap" "$TEST_COUNT" "${listener_ns}")

		echo "Capturing traffic for test $TEST_COUNT into $capfile"
		ip netns exec ${listener_ns} tcpdump -i any -s 65535 -B 32768 $capuser -w $capfile > "$capout" 2>&1 &
		cappid=$!

		sleep 1
	fi

	NSTAT_HISTORY=/tmp/${listener_ns}.nstat ip netns exec ${listener_ns} \
		nstat -n
	NSTAT_HISTORY=/tmp/${connector_ns}.nstat ip netns exec ${connector_ns} \
		nstat -n

	local extra_args
	if [ $speed = "fast" ]; then
		extra_args="-j"
	elif [ $speed = "slow" ]; then
		extra_args="-r 50"
	elif [[ $speed = "speed_"* ]]; then
		extra_args="-r ${speed:6}"
	fi

	if [[ "${addr_nr_ns1}" = "userspace_"* ]]; then
		userspace_pm=1
		addr_nr_ns1=${addr_nr_ns1:10}
	fi

	local flags="subflow"
	local extra_cl_args=""
	local extra_srv_args=""
	local trunc_size=""
	if [[ "${addr_nr_ns2}" = "fastclose_"* ]]; then
		if [ ${test_link_fail} -le 1 ]; then
			echo "fastclose tests need test_link_fail argument"
			fail_test
			return 1
		fi

		# disconnect
		trunc_size=${test_link_fail}
		local side=${addr_nr_ns2:10}

		if [ ${side} = "client" ]; then
			extra_cl_args="-f ${test_link_fail}"
			extra_srv_args="-f -1"
		elif [ ${side} = "server" ]; then
			extra_srv_args="-f ${test_link_fail}"
			extra_cl_args="-f -1"
		else
			echo "wrong/unknown fastclose spec ${side}"
			fail_test
			return 1
		fi
		addr_nr_ns2=0
	elif [[ "${addr_nr_ns2}" = "userspace_"* ]]; then
		userspace_pm=1
		addr_nr_ns2=${addr_nr_ns2:10}
	elif [[ "${addr_nr_ns2}" = "fullmesh_"* ]]; then
		flags="${flags},fullmesh"
		addr_nr_ns2=${addr_nr_ns2:9}
	fi

	if [ $userspace_pm -eq 1 ]; then
		evts_ns1=$(mktemp)
		evts_ns2=$(mktemp)
		:> "$evts_ns1"
		:> "$evts_ns2"
		ip netns exec ${listener_ns} ./pm_nl_ctl events >> "$evts_ns1" 2>&1 &
		evts_ns1_pid=$!
		ip netns exec ${connector_ns} ./pm_nl_ctl events >> "$evts_ns2" 2>&1 &
		evts_ns2_pid=$!
	fi

	local local_addr
	if is_v6 "${connect_addr}"; then
		local_addr="::"
	else
		local_addr="0.0.0.0"
	fi

	extra_srv_args="$extra_args $extra_srv_args"
	if [ "$test_link_fail" -gt 1 ];then
		timeout ${timeout_test} \
			ip netns exec ${listener_ns} \
				./mptcp_connect -t ${timeout_poll} -l -p $port -s ${srv_proto} \
					$extra_srv_args ${local_addr} < "$sinfail" > "$sout" &
	else
		timeout ${timeout_test} \
			ip netns exec ${listener_ns} \
				./mptcp_connect -t ${timeout_poll} -l -p $port -s ${srv_proto} \
					$extra_srv_args ${local_addr} < "$sin" > "$sout" &
	fi
	local spid=$!

	wait_local_port_listen "${listener_ns}" "${port}"

	extra_cl_args="$extra_args $extra_cl_args"
	if [ "$test_link_fail" -eq 0 ];then
		timeout ${timeout_test} \
			ip netns exec ${connector_ns} \
				./mptcp_connect -t ${timeout_poll} -p $port -s ${cl_proto} \
					$extra_cl_args $connect_addr < "$cin" > "$cout" &
	elif [ "$test_link_fail" -eq 1 ] || [ "$test_link_fail" -eq 2 ];then
		( cat "$cinfail" ; sleep 2; link_failure $listener_ns ; cat "$cinfail" ) | \
			tee "$cinsent" | \
			timeout ${timeout_test} \
				ip netns exec ${connector_ns} \
					./mptcp_connect -t ${timeout_poll} -p $port -s ${cl_proto} \
						$extra_cl_args $connect_addr > "$cout" &
	else
		tee "$cinsent" < "$cinfail" | \
			timeout ${timeout_test} \
				ip netns exec ${connector_ns} \
					./mptcp_connect -t ${timeout_poll} -p $port -s ${cl_proto} \
						$extra_cl_args $connect_addr > "$cout" &
	fi
	local cpid=$!

	# let the mptcp subflow be established in background before
	# do endpoint manipulation
	if [ $addr_nr_ns1 != "0" ] || [ $addr_nr_ns2 != "0" ]; then
		sleep 1
	fi

	if [ $addr_nr_ns1 -gt 0 ]; then
		local counter=2
		local add_nr_ns1=${addr_nr_ns1}
		local id=10
		local tk
		while [ $add_nr_ns1 -gt 0 ]; do
			local addr
			if is_v6 "${connect_addr}"; then
				addr="dead:beef:$counter::1"
			else
				addr="10.0.$counter.1"
			fi
			if [ $userspace_pm -eq 0 ]; then
				pm_nl_add_endpoint $ns1 $addr flags signal
			else
				tk=$(sed -n 's/.*\(token:\)\([[:digit:]]*\).*$/\2/p;q' "$evts_ns1")
				ip netns exec ${listener_ns} ./pm_nl_ctl ann $addr token $tk id $id
				sleep 1
				ip netns exec ${listener_ns} ./pm_nl_ctl rem token $tk id $id
			fi

			counter=$((counter + 1))
			add_nr_ns1=$((add_nr_ns1 - 1))
			id=$((id + 1))
		done
	elif [ $addr_nr_ns1 -lt 0 ]; then
		local rm_nr_ns1=$((-addr_nr_ns1))
		if [ $rm_nr_ns1 -lt 8 ]; then
			local counter=0
			local line
			pm_nl_show_endpoints ${listener_ns} | while read -r line; do
				# shellcheck disable=SC2206 # we do want to split per word
				local arr=($line)
				local nr=0

				local i
				for i in "${arr[@]}"; do
					if [ $i = "id" ]; then
						if [ $counter -eq $rm_nr_ns1 ]; then
							break
						fi
						id=${arr[$nr+1]}
						rm_addr=$(rm_addr_count ${connector_ns})
						pm_nl_del_endpoint ${listener_ns} $id
						wait_rm_addr ${connector_ns} ${rm_addr}
						counter=$((counter + 1))
					fi
					nr=$((nr + 1))
				done
			done
		elif [ $rm_nr_ns1 -eq 8 ]; then
			pm_nl_flush_endpoint ${listener_ns}
		elif [ $rm_nr_ns1 -eq 9 ]; then
			pm_nl_del_endpoint ${listener_ns} 0 ${connect_addr}
		fi
	fi

	# if newly added endpoints must be deleted, give the background msk
	# some time to created them
	[ $addr_nr_ns1 -gt 0 ] && [ $addr_nr_ns2 -lt 0 ] && sleep 1

	if [ $addr_nr_ns2 -gt 0 ]; then
		local add_nr_ns2=${addr_nr_ns2}
		local counter=3
		local id=20
		local tk da dp sp
		while [ $add_nr_ns2 -gt 0 ]; do
			local addr
			if is_v6 "${connect_addr}"; then
				addr="dead:beef:$counter::2"
			else
				addr="10.0.$counter.2"
			fi
			if [ $userspace_pm -eq 0 ]; then
				pm_nl_add_endpoint $ns2 $addr flags $flags
			else
				tk=$(sed -n 's/.*\(token:\)\([[:digit:]]*\).*$/\2/p;q' "$evts_ns2")
				da=$(sed -n 's/.*\(daddr4:\)\([0-9.]*\).*$/\2/p;q' "$evts_ns2")
				dp=$(sed -n 's/.*\(dport:\)\([[:digit:]]*\).*$/\2/p;q' "$evts_ns2")
				ip netns exec ${connector_ns} ./pm_nl_ctl csf lip $addr lid $id \
									rip $da rport $dp token $tk
				sleep 1
				sp=$(grep "type:10" "$evts_ns2" |
				     sed -n 's/.*\(sport:\)\([[:digit:]]*\).*$/\2/p;q')
				ip netns exec ${connector_ns} ./pm_nl_ctl dsf lip $addr lport $sp \
									rip $da rport $dp token $tk
			fi
			counter=$((counter + 1))
			add_nr_ns2=$((add_nr_ns2 - 1))
			id=$((id + 1))
		done
	elif [ $addr_nr_ns2 -lt 0 ]; then
		local rm_nr_ns2=$((-addr_nr_ns2))
		if [ $rm_nr_ns2 -lt 8 ]; then
			local counter=0
			local line
			pm_nl_show_endpoints ${connector_ns} | while read -r line; do
				# shellcheck disable=SC2206 # we do want to split per word
				local arr=($line)
				local nr=0

				local i
				for i in "${arr[@]}"; do
					if [ $i = "id" ]; then
						if [ $counter -eq $rm_nr_ns2 ]; then
							break
						fi
						local id rm_addr
						# rm_addr are serialized, allow the previous one to
						# complete
						id=${arr[$nr+1]}
						rm_addr=$(rm_addr_count ${listener_ns})
						pm_nl_del_endpoint ${connector_ns} $id
						wait_rm_addr ${listener_ns} ${rm_addr}
						counter=$((counter + 1))
					fi
					nr=$((nr + 1))
				done
			done
		elif [ $rm_nr_ns2 -eq 8 ]; then
			pm_nl_flush_endpoint ${connector_ns}
		elif [ $rm_nr_ns2 -eq 9 ]; then
			local addr
			if is_v6 "${connect_addr}"; then
				addr="dead:beef:1::2"
			else
				addr="10.0.1.2"
			fi
			pm_nl_del_endpoint ${connector_ns} 0 $addr
		fi
	fi

	if [ -n "${sflags}" ]; then
		sleep 1

		local netns
		for netns in "$ns1" "$ns2"; do
			local line
			pm_nl_show_endpoints $netns | while read -r line; do
				# shellcheck disable=SC2206 # we do want to split per word
				local arr=($line)
				local nr=0
				local id

				local i
				for i in "${arr[@]}"; do
					if [ $i = "id" ]; then
						id=${arr[$nr+1]}
					fi
					nr=$((nr + 1))
				done
				pm_nl_change_endpoint $netns $id $sflags
			done
		done
	fi

	wait $cpid
	local retc=$?
	wait $spid
	local rets=$?

	if [ $capture -eq 1 ]; then
	    sleep 1
	    kill $cappid
	fi

	if [ $userspace_pm -eq 1 ]; then
		kill_wait $evts_ns1_pid
		kill_wait $evts_ns2_pid
		rm -rf $evts_ns1 $evts_ns2
	fi

	NSTAT_HISTORY=/tmp/${listener_ns}.nstat ip netns exec ${listener_ns} \
		nstat | grep Tcp > /tmp/${listener_ns}.out
	NSTAT_HISTORY=/tmp/${connector_ns}.nstat ip netns exec ${connector_ns} \
		nstat | grep Tcp > /tmp/${connector_ns}.out

	if [ ${rets} -ne 0 ] || [ ${retc} -ne 0 ]; then
		echo " client exit code $retc, server $rets" 1>&2
		echo -e "\nnetns ${listener_ns} socket stat for ${port}:" 1>&2
		ip netns exec ${listener_ns} ss -Menita 1>&2 -o "sport = :$port"
		cat /tmp/${listener_ns}.out
		echo -e "\nnetns ${connector_ns} socket stat for ${port}:" 1>&2
		ip netns exec ${connector_ns} ss -Menita 1>&2 -o "dport = :$port"
		cat /tmp/${connector_ns}.out

		cat "$capout"
		fail_test
		return 1
	fi

	if [ "$test_link_fail" -gt 1 ];then
		check_transfer $sinfail $cout "file received by client" $trunc_size
	else
		check_transfer $sin $cout "file received by client" $trunc_size
	fi
	retc=$?
	if [ "$test_link_fail" -eq 0 ];then
		check_transfer $cin $sout "file received by server" $trunc_size
	else
		check_transfer $cinsent $sout "file received by server" $trunc_size
	fi
	rets=$?

	if [ $retc -eq 0 ] && [ $rets -eq 0 ];then
		cat "$capout"
		return 0
	fi

	cat "$capout"
	return 1
}

make_file()
{
	local name=$1
	local who=$2
	local size=$3

	dd if=/dev/urandom of="$name" bs=1024 count=$size 2> /dev/null
	echo -e "\nMPTCP_TEST_FILE_END_MARKER" >> "$name"

	echo "Created $name (size $size KB) containing data sent by $who"
}

run_tests()
{
	local listener_ns="$1"
	local connector_ns="$2"
	local connect_addr="$3"
	local test_linkfail="${4:-0}"
	local addr_nr_ns1="${5:-0}"
	local addr_nr_ns2="${6:-0}"
	local speed="${7:-fast}"
	local sflags="${8:-""}"

	local size

	# The values above 2 are reused to make test files
	# with the given sizes (KB)
	if [ "$test_linkfail" -gt 2 ]; then
		size=$test_linkfail

		if [ -z "$cinfail" ]; then
			cinfail=$(mktemp)
		fi
		make_file "$cinfail" "client" $size
	# create the input file for the failure test when
	# the first failure test run
	elif [ "$test_linkfail" -ne 0 ] && [ -z "$cinfail" ]; then
		# the client file must be considerably larger
		# of the maximum expected cwin value, or the
		# link utilization will be not predicable
		size=$((RANDOM%2))
		size=$((size+1))
		size=$((size*8192))
		size=$((size + ( RANDOM % 8192) ))

		cinfail=$(mktemp)
		make_file "$cinfail" "client" $size
	fi

	if [ "$test_linkfail" -gt 2 ]; then
		size=$test_linkfail

		if [ -z "$sinfail" ]; then
			sinfail=$(mktemp)
		fi
		make_file "$sinfail" "server" $size
	elif [ "$test_linkfail" -eq 2 ] && [ -z "$sinfail" ]; then
		size=$((RANDOM%16))
		size=$((size+1))
		size=$((size*2048))

		sinfail=$(mktemp)
		make_file "$sinfail" "server" $size
	fi

	do_transfer ${listener_ns} ${connector_ns} MPTCP MPTCP ${connect_addr} \
		${test_linkfail} ${addr_nr_ns1} ${addr_nr_ns2} ${speed} ${sflags}
}

dump_stats()
{
	echo Server ns stats
	ip netns exec $ns1 nstat -as | grep Tcp
	echo Client ns stats
	ip netns exec $ns2 nstat -as | grep Tcp
}

chk_csum_nr()
{
	local csum_ns1=${1:-0}
	local csum_ns2=${2:-0}
	local count
	local dump_stats
	local extra_msg=""
	local allow_multi_errors_ns1=0
	local allow_multi_errors_ns2=0

	if [[ "${csum_ns1}" = "+"* ]]; then
		allow_multi_errors_ns1=1
		csum_ns1=${csum_ns1:1}
	fi
	if [[ "${csum_ns2}" = "+"* ]]; then
		allow_multi_errors_ns2=1
		csum_ns2=${csum_ns2:1}
	fi

	printf "%-${nr_blank}s %s" " " "sum"
	count=$(ip netns exec $ns1 nstat -as | grep MPTcpExtDataCsumErr | awk '{print $2}')
	[ -z "$count" ] && count=0
	if [ "$count" != "$csum_ns1" ]; then
		extra_msg="$extra_msg ns1=$count"
	fi
	if { [ "$count" != $csum_ns1 ] && [ $allow_multi_errors_ns1 -eq 0 ]; } ||
	   { [ "$count" -lt $csum_ns1 ] && [ $allow_multi_errors_ns1 -eq 1 ]; }; then
		echo "[fail] got $count data checksum error[s] expected $csum_ns1"
		fail_test
		dump_stats=1
	else
		echo -n "[ ok ]"
	fi
	echo -n " - csum  "
	count=$(ip netns exec $ns2 nstat -as | grep MPTcpExtDataCsumErr | awk '{print $2}')
	[ -z "$count" ] && count=0
	if [ "$count" != "$csum_ns2" ]; then
		extra_msg="$extra_msg ns2=$count"
	fi
	if { [ "$count" != $csum_ns2 ] && [ $allow_multi_errors_ns2 -eq 0 ]; } ||
	   { [ "$count" -lt $csum_ns2 ] && [ $allow_multi_errors_ns2 -eq 1 ]; }; then
		echo "[fail] got $count data checksum error[s] expected $csum_ns2"
		fail_test
		dump_stats=1
	else
		echo -n "[ ok ]"
	fi
	[ "${dump_stats}" = 1 ] && dump_stats

	echo "$extra_msg"
}

chk_fail_nr()
{
	local fail_tx=$1
	local fail_rx=$2
	local ns_invert=${3:-""}
	local count
	local dump_stats
	local ns_tx=$ns1
	local ns_rx=$ns2
	local extra_msg=""
	local allow_tx_lost=0
	local allow_rx_lost=0

	if [[ $ns_invert = "invert" ]]; then
		ns_tx=$ns2
		ns_rx=$ns1
		extra_msg=" invert"
	fi

	if [[ "${fail_tx}" = "-"* ]]; then
		allow_tx_lost=1
		fail_tx=${fail_tx:1}
	fi
	if [[ "${fail_rx}" = "-"* ]]; then
		allow_rx_lost=1
		fail_rx=${fail_rx:1}
	fi

	printf "%-${nr_blank}s %s" " " "ftx"
	count=$(ip netns exec $ns_tx nstat -as | grep MPTcpExtMPFailTx | awk '{print $2}')
	[ -z "$count" ] && count=0
	if [ "$count" != "$fail_tx" ]; then
		extra_msg="$extra_msg,tx=$count"
	fi
	if { [ "$count" != "$fail_tx" ] && [ $allow_tx_lost -eq 0 ]; } ||
	   { [ "$count" -gt "$fail_tx" ] && [ $allow_tx_lost -eq 1 ]; }; then
		echo "[fail] got $count MP_FAIL[s] TX expected $fail_tx"
		fail_test
		dump_stats=1
	else
		echo -n "[ ok ]"
	fi

	echo -n " - failrx"
	count=$(ip netns exec $ns_rx nstat -as | grep MPTcpExtMPFailRx | awk '{print $2}')
	[ -z "$count" ] && count=0
	if [ "$count" != "$fail_rx" ]; then
		extra_msg="$extra_msg,rx=$count"
	fi
	if { [ "$count" != "$fail_rx" ] && [ $allow_rx_lost -eq 0 ]; } ||
	   { [ "$count" -gt "$fail_rx" ] && [ $allow_rx_lost -eq 1 ]; }; then
		echo "[fail] got $count MP_FAIL[s] RX expected $fail_rx"
		fail_test
		dump_stats=1
	else
		echo -n "[ ok ]"
	fi

	[ "${dump_stats}" = 1 ] && dump_stats

	echo "$extra_msg"
}

chk_fclose_nr()
{
	local fclose_tx=$1
	local fclose_rx=$2
	local ns_invert=$3
	local count
	local dump_stats
	local ns_tx=$ns2
	local ns_rx=$ns1
	local extra_msg="   "

	if [[ $ns_invert = "invert" ]]; then
		ns_tx=$ns1
		ns_rx=$ns2
		extra_msg=${extra_msg}"invert"
	fi

	printf "%-${nr_blank}s %s" " " "ctx"
	count=$(ip netns exec $ns_tx nstat -as | grep MPTcpExtMPFastcloseTx | awk '{print $2}')
	[ -z "$count" ] && count=0
	[ "$count" != "$fclose_tx" ] && extra_msg="$extra_msg,tx=$count"
	if [ "$count" != "$fclose_tx" ]; then
		echo "[fail] got $count MP_FASTCLOSE[s] TX expected $fclose_tx"
		fail_test
		dump_stats=1
	else
		echo -n "[ ok ]"
	fi

	echo -n " - fclzrx"
	count=$(ip netns exec $ns_rx nstat -as | grep MPTcpExtMPFastcloseRx | awk '{print $2}')
	[ -z "$count" ] && count=0
	[ "$count" != "$fclose_rx" ] && extra_msg="$extra_msg,rx=$count"
	if [ "$count" != "$fclose_rx" ]; then
		echo "[fail] got $count MP_FASTCLOSE[s] RX expected $fclose_rx"
		fail_test
		dump_stats=1
	else
		echo -n "[ ok ]"
	fi

	[ "${dump_stats}" = 1 ] && dump_stats

	echo "$extra_msg"
}

chk_rst_nr()
{
	local rst_tx=$1
	local rst_rx=$2
	local ns_invert=${3:-""}
	local count
	local dump_stats
	local ns_tx=$ns1
	local ns_rx=$ns2
	local extra_msg=""

	if [[ $ns_invert = "invert" ]]; then
		ns_tx=$ns2
		ns_rx=$ns1
		extra_msg="   invert"
	fi

	printf "%-${nr_blank}s %s" " " "rtx"
	count=$(ip netns exec $ns_tx nstat -as | grep MPTcpExtMPRstTx | awk '{print $2}')
	[ -z "$count" ] && count=0
	if [ $count -lt $rst_tx ]; then
		echo "[fail] got $count MP_RST[s] TX expected $rst_tx"
		fail_test
		dump_stats=1
	else
		echo -n "[ ok ]"
	fi

	echo -n " - rstrx "
	count=$(ip netns exec $ns_rx nstat -as | grep MPTcpExtMPRstRx | awk '{print $2}')
	[ -z "$count" ] && count=0
	if [ "$count" -lt "$rst_rx" ]; then
		echo "[fail] got $count MP_RST[s] RX expected $rst_rx"
		fail_test
		dump_stats=1
	else
		echo -n "[ ok ]"
	fi

	[ "${dump_stats}" = 1 ] && dump_stats

	echo "$extra_msg"
}

chk_infi_nr()
{
	local infi_tx=$1
	local infi_rx=$2
	local count
	local dump_stats

	printf "%-${nr_blank}s %s" " " "itx"
	count=$(ip netns exec $ns2 nstat -as | grep InfiniteMapTx | awk '{print $2}')
	[ -z "$count" ] && count=0
	if [ "$count" != "$infi_tx" ]; then
		echo "[fail] got $count infinite map[s] TX expected $infi_tx"
		fail_test
		dump_stats=1
	else
		echo -n "[ ok ]"
	fi

	echo -n " - infirx"
	count=$(ip netns exec $ns1 nstat -as | grep InfiniteMapRx | awk '{print $2}')
	[ -z "$count" ] && count=0
	if [ "$count" != "$infi_rx" ]; then
		echo "[fail] got $count infinite map[s] RX expected $infi_rx"
		fail_test
		dump_stats=1
	else
		echo "[ ok ]"
	fi

	[ "${dump_stats}" = 1 ] && dump_stats
}

chk_join_nr()
{
	local syn_nr=$1
	local syn_ack_nr=$2
	local ack_nr=$3
	local csum_ns1=${4:-0}
	local csum_ns2=${5:-0}
	local fail_nr=${6:-0}
	local rst_nr=${7:-0}
	local infi_nr=${8:-0}
	local corrupted_pkts=${9:-0}
	local count
	local dump_stats
	local with_cookie
	local title="${TEST_NAME}"

	if [ "${corrupted_pkts}" -gt 0 ]; then
		title+=": ${corrupted_pkts} corrupted pkts"
	fi

	printf "%03u %-36s %s" "${TEST_COUNT}" "${title}" "syn"
	count=$(ip netns exec $ns1 nstat -as | grep MPTcpExtMPJoinSynRx | awk '{print $2}')
	[ -z "$count" ] && count=0
	if [ "$count" != "$syn_nr" ]; then
		echo "[fail] got $count JOIN[s] syn expected $syn_nr"
		fail_test
		dump_stats=1
	else
		echo -n "[ ok ]"
	fi

	echo -n " - synack"
	with_cookie=$(ip netns exec $ns2 sysctl -n net.ipv4.tcp_syncookies)
	count=$(ip netns exec $ns2 nstat -as | grep MPTcpExtMPJoinSynAckRx | awk '{print $2}')
	[ -z "$count" ] && count=0
	if [ "$count" != "$syn_ack_nr" ]; then
		# simult connections exceeding the limit with cookie enabled could go up to
		# synack validation as the conn limit can be enforced reliably only after
		# the subflow creation
		if [ "$with_cookie" = 2 ] && [ "$count" -gt "$syn_ack_nr" ] && [ "$count" -le "$syn_nr" ]; then
			echo -n "[ ok ]"
		else
			echo "[fail] got $count JOIN[s] synack expected $syn_ack_nr"
			fail_test
			dump_stats=1
		fi
	else
		echo -n "[ ok ]"
	fi

	echo -n " - ack"
	count=$(ip netns exec $ns1 nstat -as | grep MPTcpExtMPJoinAckRx | awk '{print $2}')
	[ -z "$count" ] && count=0
	if [ "$count" != "$ack_nr" ]; then
		echo "[fail] got $count JOIN[s] ack expected $ack_nr"
		fail_test
		dump_stats=1
	else
		echo "[ ok ]"
	fi
	[ "${dump_stats}" = 1 ] && dump_stats
	if [ $validate_checksum -eq 1 ]; then
		chk_csum_nr $csum_ns1 $csum_ns2
		chk_fail_nr $fail_nr $fail_nr
		chk_rst_nr $rst_nr $rst_nr
		chk_infi_nr $infi_nr $infi_nr
	fi
}

# a negative value for 'stale_max' means no upper bound:
# for bidirectional transfer, if one peer sleep for a while
# - as these tests do - we can have a quite high number of
# stale/recover conversions, proportional to
# sleep duration/ MPTCP-level RTX interval.
chk_stale_nr()
{
	local ns=$1
	local stale_min=$2
	local stale_max=$3
	local stale_delta=$4
	local dump_stats
	local stale_nr
	local recover_nr

	printf "%-${nr_blank}s %-18s" " " "stale"
	stale_nr=$(ip netns exec $ns nstat -as | grep MPTcpExtSubflowStale | awk '{print $2}')
	[ -z "$stale_nr" ] && stale_nr=0
	recover_nr=$(ip netns exec $ns nstat -as | grep MPTcpExtSubflowRecover | awk '{print $2}')
	[ -z "$recover_nr" ] && recover_nr=0

	if [ $stale_nr -lt $stale_min ] ||
	   { [ $stale_max -gt 0 ] && [ $stale_nr -gt $stale_max ]; } ||
	   [ $((stale_nr - recover_nr)) -ne $stale_delta ]; then
		echo "[fail] got $stale_nr stale[s] $recover_nr recover[s], " \
		     " expected stale in range [$stale_min..$stale_max]," \
		     " stale-recover delta $stale_delta "
		fail_test
		dump_stats=1
	else
		echo "[ ok ]"
	fi

	if [ "${dump_stats}" = 1 ]; then
		echo $ns stats
		ip netns exec $ns ip -s link show
		ip netns exec $ns nstat -as | grep MPTcp
	fi
}

chk_add_nr()
{
	local add_nr=$1
	local echo_nr=$2
	local port_nr=${3:-0}
	local syn_nr=${4:-$port_nr}
	local syn_ack_nr=${5:-$port_nr}
	local ack_nr=${6:-$port_nr}
	local mis_syn_nr=${7:-0}
	local mis_ack_nr=${8:-0}
	local count
	local dump_stats
	local timeout

	timeout=$(ip netns exec $ns1 sysctl -n net.mptcp.add_addr_timeout)

	printf "%-${nr_blank}s %s" " " "add"
	count=$(ip netns exec $ns2 nstat -as MPTcpExtAddAddr | grep MPTcpExtAddAddr | awk '{print $2}')
	[ -z "$count" ] && count=0

	# if the test configured a short timeout tolerate greater then expected
	# add addrs options, due to retransmissions
	if [ "$count" != "$add_nr" ] && { [ "$timeout" -gt 1 ] || [ "$count" -lt "$add_nr" ]; }; then
		echo "[fail] got $count ADD_ADDR[s] expected $add_nr"
		fail_test
		dump_stats=1
	else
		echo -n "[ ok ]"
	fi

	echo -n " - echo  "
	count=$(ip netns exec $ns1 nstat -as | grep MPTcpExtEchoAdd | awk '{print $2}')
	[ -z "$count" ] && count=0
	if [ "$count" != "$echo_nr" ]; then
		echo "[fail] got $count ADD_ADDR echo[s] expected $echo_nr"
		fail_test
		dump_stats=1
	else
		echo -n "[ ok ]"
	fi

	if [ $port_nr -gt 0 ]; then
		echo -n " - pt "
		count=$(ip netns exec $ns2 nstat -as | grep MPTcpExtPortAdd | awk '{print $2}')
		[ -z "$count" ] && count=0
		if [ "$count" != "$port_nr" ]; then
			echo "[fail] got $count ADD_ADDR[s] with a port-number expected $port_nr"
			fail_test
			dump_stats=1
		else
			echo "[ ok ]"
		fi

		printf "%-${nr_blank}s %s" " " "syn"
		count=$(ip netns exec $ns1 nstat -as | grep MPTcpExtMPJoinPortSynRx |
			awk '{print $2}')
		[ -z "$count" ] && count=0
		if [ "$count" != "$syn_nr" ]; then
			echo "[fail] got $count JOIN[s] syn with a different \
				port-number expected $syn_nr"
			fail_test
			dump_stats=1
		else
			echo -n "[ ok ]"
		fi

		echo -n " - synack"
		count=$(ip netns exec $ns2 nstat -as | grep MPTcpExtMPJoinPortSynAckRx |
			awk '{print $2}')
		[ -z "$count" ] && count=0
		if [ "$count" != "$syn_ack_nr" ]; then
			echo "[fail] got $count JOIN[s] synack with a different \
				port-number expected $syn_ack_nr"
			fail_test
			dump_stats=1
		else
			echo -n "[ ok ]"
		fi

		echo -n " - ack"
		count=$(ip netns exec $ns1 nstat -as | grep MPTcpExtMPJoinPortAckRx |
			awk '{print $2}')
		[ -z "$count" ] && count=0
		if [ "$count" != "$ack_nr" ]; then
			echo "[fail] got $count JOIN[s] ack with a different \
				port-number expected $ack_nr"
			fail_test
			dump_stats=1
		else
			echo "[ ok ]"
		fi

		printf "%-${nr_blank}s %s" " " "syn"
		count=$(ip netns exec $ns1 nstat -as | grep MPTcpExtMismatchPortSynRx |
			awk '{print $2}')
		[ -z "$count" ] && count=0
		if [ "$count" != "$mis_syn_nr" ]; then
			echo "[fail] got $count JOIN[s] syn with a mismatched \
				port-number expected $mis_syn_nr"
			fail_test
			dump_stats=1
		else
			echo -n "[ ok ]"
		fi

		echo -n " - ack   "
		count=$(ip netns exec $ns1 nstat -as | grep MPTcpExtMismatchPortAckRx |
			awk '{print $2}')
		[ -z "$count" ] && count=0
		if [ "$count" != "$mis_ack_nr" ]; then
			echo "[fail] got $count JOIN[s] ack with a mismatched \
				port-number expected $mis_ack_nr"
			fail_test
			dump_stats=1
		else
			echo "[ ok ]"
		fi
	else
		echo ""
	fi

	[ "${dump_stats}" = 1 ] && dump_stats
}

chk_rm_nr()
{
	local rm_addr_nr=$1
	local rm_subflow_nr=$2
	local invert
	local simult
	local count
	local dump_stats
	local addr_ns=$ns1
	local subflow_ns=$ns2
	local extra_msg=""

	shift 2
	while [ -n "$1" ]; do
		[ "$1" = "invert" ] && invert=true
		[ "$1" = "simult" ] && simult=true
		shift
	done

	if [ -z $invert ]; then
		addr_ns=$ns1
		subflow_ns=$ns2
	elif [ $invert = "true" ]; then
		addr_ns=$ns2
		subflow_ns=$ns1
		extra_msg="   invert"
	fi

	printf "%-${nr_blank}s %s" " " "rm "
	count=$(ip netns exec $addr_ns nstat -as | grep MPTcpExtRmAddr | awk '{print $2}')
	[ -z "$count" ] && count=0
	if [ "$count" != "$rm_addr_nr" ]; then
		echo "[fail] got $count RM_ADDR[s] expected $rm_addr_nr"
		fail_test
		dump_stats=1
	else
		echo -n "[ ok ]"
	fi

	echo -n " - rmsf  "
	count=$(ip netns exec $subflow_ns nstat -as | grep MPTcpExtRmSubflow | awk '{print $2}')
	[ -z "$count" ] && count=0
	if [ -n "$simult" ]; then
		local cnt suffix

		cnt=$(ip netns exec $addr_ns nstat -as | grep MPTcpExtRmSubflow | awk '{print $2}')

		# in case of simult flush, the subflow removal count on each side is
		# unreliable
		[ -z "$cnt" ] && cnt=0
		count=$((count + cnt))
		[ "$count" != "$rm_subflow_nr" ] && suffix="$count in [$rm_subflow_nr:$((rm_subflow_nr*2))]"
		if [ $count -ge "$rm_subflow_nr" ] && \
		   [ "$count" -le "$((rm_subflow_nr *2 ))" ]; then
			echo "[ ok ] $suffix"
		else
			echo "[fail] got $count RM_SUBFLOW[s] expected in range [$rm_subflow_nr:$((rm_subflow_nr*2))]"
			fail_test
			dump_stats=1
		fi
		return
	fi
	if [ "$count" != "$rm_subflow_nr" ]; then
		echo "[fail] got $count RM_SUBFLOW[s] expected $rm_subflow_nr"
		fail_test
		dump_stats=1
	else
		echo -n "[ ok ]"
	fi

	[ "${dump_stats}" = 1 ] && dump_stats

	echo "$extra_msg"
}

chk_prio_nr()
{
	local mp_prio_nr_tx=$1
	local mp_prio_nr_rx=$2
	local count
	local dump_stats

	printf "%-${nr_blank}s %s" " " "ptx"
	count=$(ip netns exec $ns1 nstat -as | grep MPTcpExtMPPrioTx | awk '{print $2}')
	[ -z "$count" ] && count=0
	if [ "$count" != "$mp_prio_nr_tx" ]; then
		echo "[fail] got $count MP_PRIO[s] TX expected $mp_prio_nr_tx"
		fail_test
		dump_stats=1
	else
		echo -n "[ ok ]"
	fi

	echo -n " - prx   "
	count=$(ip netns exec $ns1 nstat -as | grep MPTcpExtMPPrioRx | awk '{print $2}')
	[ -z "$count" ] && count=0
	if [ "$count" != "$mp_prio_nr_rx" ]; then
		echo "[fail] got $count MP_PRIO[s] RX expected $mp_prio_nr_rx"
		fail_test
		dump_stats=1
	else
		echo "[ ok ]"
	fi

	[ "${dump_stats}" = 1 ] && dump_stats
}

chk_subflow_nr()
{
	local need_title="$1"
	local msg="$2"
	local subflow_nr=$3
	local cnt1
	local cnt2

	if [ -n "${need_title}" ]; then
		printf "%03u %-36s %s" "${TEST_COUNT}" "${TEST_NAME}" "${msg}"
	else
		printf "%-${nr_blank}s %s" " " "${msg}"
	fi

	cnt1=$(ss -N $ns1 -tOni | grep -c token)
	cnt2=$(ss -N $ns2 -tOni | grep -c token)
	if [ "$cnt1" != "$subflow_nr" -o "$cnt2" != "$subflow_nr" ]; then
		echo "[fail] got $cnt1:$cnt2 subflows expected $subflow_nr"
		fail_test
		dump_stats=1
	else
		echo "[ ok ]"
	fi

	[ "${dump_stats}" = 1 ] && ( ss -N $ns1 -tOni ; ss -N $ns1 -tOni | grep token; ip -n $ns1 mptcp endpoint )
}

chk_link_usage()
{
	local ns=$1
	local link=$2
	local out=$3
	local expected_rate=$4

	local tx_link tx_total
	tx_link=$(ip netns exec $ns cat /sys/class/net/$link/statistics/tx_bytes)
	tx_total=$(stat --format=%s $out)
	local tx_rate=$((tx_link * 100 / tx_total))
	local tolerance=5

	printf "%-${nr_blank}s %-18s" " " "link usage"
	if [ $tx_rate -lt $((expected_rate - tolerance)) ] || \
	   [ $tx_rate -gt $((expected_rate + tolerance)) ]; then
		echo "[fail] got $tx_rate% usage, expected $expected_rate%"
		fail_test
	else
		echo "[ ok ]"
	fi
}

wait_attempt_fail()
{
	local timeout_ms=$((timeout_poll * 1000))
	local time=0
	local ns=$1

	while [ $time -lt $timeout_ms ]; do
		local cnt

		cnt=$(ip netns exec $ns nstat -as TcpAttemptFails | grep TcpAttemptFails | awk '{print $2}')

		[ "$cnt" = 1 ] && return 1
		time=$((time + 100))
		sleep 0.1
	done
	return 1
}

set_userspace_pm()
{
	local ns=$1

	ip netns exec $ns sysctl -q net.mptcp.pm_type=1
}

subflows_tests()
{
	if reset "no JOIN"; then
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 0 0 0
	fi

	# subflow limited by client
	if reset "single subflow, limited by client"; then
		pm_nl_set_limits $ns1 0 0
		pm_nl_set_limits $ns2 0 0
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 0 0 0
	fi

	# subflow limited by server
	if reset "single subflow, limited by server"; then
		pm_nl_set_limits $ns1 0 0
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 1 1 0
	fi

	# subflow
	if reset "single subflow"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 1 1 1
	fi

	# multiple subflows
	if reset "multiple subflows"; then
		pm_nl_set_limits $ns1 0 2
		pm_nl_set_limits $ns2 0 2
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 2 2 2
	fi

	# multiple subflows limited by server
	if reset "multiple subflows, limited by server"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 2
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 2 2 1
	fi

	# single subflow, dev
	if reset "single subflow, dev"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow dev ns2eth3
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 1 1 1
	fi
}

subflows_error_tests()
{
	# If a single subflow is configured, and matches the MPC src
	# address, no additional subflow should be created
	if reset "no MPC reuse with single endpoint"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow
		chk_join_nr 0 0 0
	fi

	# multiple subflows, with subflow creation error
	if reset "multi subflows, with failing subflow"; then
		pm_nl_set_limits $ns1 0 2
		pm_nl_set_limits $ns2 0 2
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow
		filter_tcp_from $ns1 10.0.3.2 REJECT
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow
		chk_join_nr 1 1 1
	fi

	# multiple subflows, with subflow timeout on MPJ
	if reset "multi subflows, with subflow timeout"; then
		pm_nl_set_limits $ns1 0 2
		pm_nl_set_limits $ns2 0 2
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow
		filter_tcp_from $ns1 10.0.3.2 DROP
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow
		chk_join_nr 1 1 1
	fi

	# multiple subflows, check that the endpoint corresponding to
	# closed subflow (due to reset) is not reused if additional
	# subflows are added later
	if reset "multi subflows, fair usage on close"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		filter_tcp_from $ns1 10.0.3.2 REJECT
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow &

		# mpj subflow will be in TW after the reset
		wait_attempt_fail $ns2
		pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow
		wait

		# additional subflow could be created only if the PM select
		# the later endpoint, skipping the already used one
		chk_join_nr 1 1 1
	fi
}

signal_address_tests()
{
	# add_address, unused
	if reset "unused signal address"; then
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 0 0 0
		chk_add_nr 1 1
	fi

	# accept and use add_addr
	if reset "signal address"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 1 1
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 1 1 1
		chk_add_nr 1 1
	fi

	# accept and use add_addr with an additional subflow
	# note: signal address in server ns and local addresses in client ns must
	# belong to different subnets or one of the listed local address could be
	# used for 'add_addr' subflow
	if reset "subflow and signal"; then
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		pm_nl_set_limits $ns1 0 2
		pm_nl_set_limits $ns2 1 2
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 2 2 2
		chk_add_nr 1 1
	fi

	# accept and use add_addr with additional subflows
	if reset "multiple subflows and signal"; then
		pm_nl_set_limits $ns1 0 3
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		pm_nl_set_limits $ns2 1 3
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		pm_nl_add_endpoint $ns2 10.0.4.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 3 3 3
		chk_add_nr 1 1
	fi

	# signal addresses
	if reset "signal addresses"; then
		pm_nl_set_limits $ns1 3 3
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		pm_nl_add_endpoint $ns1 10.0.3.1 flags signal
		pm_nl_add_endpoint $ns1 10.0.4.1 flags signal
		pm_nl_set_limits $ns2 3 3
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 3 3 3
		chk_add_nr 3 3
	fi

	# signal invalid addresses
	if reset "signal invalid addresses"; then
		pm_nl_set_limits $ns1 3 3
		pm_nl_add_endpoint $ns1 10.0.12.1 flags signal
		pm_nl_add_endpoint $ns1 10.0.3.1 flags signal
		pm_nl_add_endpoint $ns1 10.0.14.1 flags signal
		pm_nl_set_limits $ns2 3 3
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 1 1 1
		chk_add_nr 3 3
	fi

	# signal addresses race test
	if reset "signal addresses race test"; then
		pm_nl_set_limits $ns1 4 4
		pm_nl_set_limits $ns2 4 4
		pm_nl_add_endpoint $ns1 10.0.1.1 flags signal
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		pm_nl_add_endpoint $ns1 10.0.3.1 flags signal
		pm_nl_add_endpoint $ns1 10.0.4.1 flags signal
		pm_nl_add_endpoint $ns2 10.0.1.2 flags signal
		pm_nl_add_endpoint $ns2 10.0.2.2 flags signal
		pm_nl_add_endpoint $ns2 10.0.3.2 flags signal
		pm_nl_add_endpoint $ns2 10.0.4.2 flags signal

		# the peer could possibly miss some addr notification, allow retransmission
		ip netns exec $ns1 sysctl -q net.mptcp.add_addr_timeout=1
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow
		chk_join_nr 3 3 3

		# the server will not signal the address terminating
		# the MPC subflow
		chk_add_nr 3 3
	fi
}

link_failure_tests()
{
	# accept and use add_addr with additional subflows and link loss
	if reset "multiple flows, signal, link failure"; then
		# without any b/w limit each veth could spool the packets and get
		# them acked at xmit time, so that the corresponding subflow will
		# have almost always no outstanding pkts, the scheduler will pick
		# always the first subflow and we will have hard time testing
		# active backup and link switch-over.
		# Let's set some arbitrary (low) virtual link limits.
		init_shapers
		pm_nl_set_limits $ns1 0 3
		pm_nl_add_endpoint $ns1 10.0.2.1 dev ns1eth2 flags signal
		pm_nl_set_limits $ns2 1 3
		pm_nl_add_endpoint $ns2 10.0.3.2 dev ns2eth3 flags subflow
		pm_nl_add_endpoint $ns2 10.0.4.2 dev ns2eth4 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 1
		chk_join_nr 3 3 3
		chk_add_nr 1 1
		chk_stale_nr $ns2 1 5 1
	fi

	# accept and use add_addr with additional subflows and link loss
	# for bidirectional transfer
	if reset "multi flows, signal, bidi, link fail"; then
		init_shapers
		pm_nl_set_limits $ns1 0 3
		pm_nl_add_endpoint $ns1 10.0.2.1 dev ns1eth2 flags signal
		pm_nl_set_limits $ns2 1 3
		pm_nl_add_endpoint $ns2 10.0.3.2 dev ns2eth3 flags subflow
		pm_nl_add_endpoint $ns2 10.0.4.2 dev ns2eth4 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 2
		chk_join_nr 3 3 3
		chk_add_nr 1 1
		chk_stale_nr $ns2 1 -1 1
	fi

	# 2 subflows plus 1 backup subflow with a lossy link, backup
	# will never be used
	if reset "backup subflow unused, link failure"; then
		init_shapers
		pm_nl_set_limits $ns1 0 2
		pm_nl_add_endpoint $ns1 10.0.2.1 dev ns1eth2 flags signal
		pm_nl_set_limits $ns2 1 2
		FAILING_LINKS="1"
		pm_nl_add_endpoint $ns2 10.0.3.2 dev ns2eth3 flags subflow,backup
		run_tests $ns1 $ns2 10.0.1.1 1
		chk_join_nr 2 2 2
		chk_add_nr 1 1
		chk_link_usage $ns2 ns2eth3 $cinsent 0
	fi

	# 2 lossy links after half transfer, backup will get half of
	# the traffic
	if reset "backup flow used, multi links fail"; then
		init_shapers
		pm_nl_set_limits $ns1 0 2
		pm_nl_add_endpoint $ns1 10.0.2.1 dev ns1eth2 flags signal
		pm_nl_set_limits $ns2 1 2
		pm_nl_add_endpoint $ns2 10.0.3.2 dev ns2eth3 flags subflow,backup
		FAILING_LINKS="1 2"
		run_tests $ns1 $ns2 10.0.1.1 1
		chk_join_nr 2 2 2
		chk_add_nr 1 1
		chk_stale_nr $ns2 2 4 2
		chk_link_usage $ns2 ns2eth3 $cinsent 50
	fi

	# use a backup subflow with the first subflow on a lossy link
	# for bidirectional transfer
	if reset "backup flow used, bidi, link failure"; then
		init_shapers
		pm_nl_set_limits $ns1 0 2
		pm_nl_add_endpoint $ns1 10.0.2.1 dev ns1eth2 flags signal
		pm_nl_set_limits $ns2 1 3
		pm_nl_add_endpoint $ns2 10.0.3.2 dev ns2eth3 flags subflow,backup
		FAILING_LINKS="1 2"
		run_tests $ns1 $ns2 10.0.1.1 2
		chk_join_nr 2 2 2
		chk_add_nr 1 1
		chk_stale_nr $ns2 1 -1 2
		chk_link_usage $ns2 ns2eth3 $cinsent 50
	fi
}

add_addr_timeout_tests()
{
	# add_addr timeout
	if reset_with_add_addr_timeout "signal address, ADD_ADDR timeout"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 1 1
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow
		chk_join_nr 1 1 1
		chk_add_nr 4 0
	fi

	# add_addr timeout IPv6
	if reset_with_add_addr_timeout "signal address, ADD_ADDR6 timeout" 6; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 1 1
		pm_nl_add_endpoint $ns1 dead:beef:2::1 flags signal
		run_tests $ns1 $ns2 dead:beef:1::1 0 0 0 slow
		chk_join_nr 1 1 1
		chk_add_nr 4 0
	fi

	# signal addresses timeout
	if reset_with_add_addr_timeout "signal addresses, ADD_ADDR timeout"; then
		pm_nl_set_limits $ns1 2 2
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		pm_nl_add_endpoint $ns1 10.0.3.1 flags signal
		pm_nl_set_limits $ns2 2 2
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 speed_10
		chk_join_nr 2 2 2
		chk_add_nr 8 0
	fi

	# signal invalid addresses timeout
	if reset_with_add_addr_timeout "invalid address, ADD_ADDR timeout"; then
		pm_nl_set_limits $ns1 2 2
		pm_nl_add_endpoint $ns1 10.0.12.1 flags signal
		pm_nl_add_endpoint $ns1 10.0.3.1 flags signal
		pm_nl_set_limits $ns2 2 2
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 speed_10
		chk_join_nr 1 1 1
		chk_add_nr 8 0
	fi
}

remove_tests()
{
	# single subflow, remove
	if reset "remove single subflow"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 0 0 -1 slow
		chk_join_nr 1 1 1
		chk_rm_nr 1 1
	fi

	# multiple subflows, remove
	if reset "remove multiple subflows"; then
		pm_nl_set_limits $ns1 0 2
		pm_nl_set_limits $ns2 0 2
		pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 0 0 -2 slow
		chk_join_nr 2 2 2
		chk_rm_nr 2 2
	fi

	# single address, remove
	if reset "remove single address"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		pm_nl_set_limits $ns2 1 1
		run_tests $ns1 $ns2 10.0.1.1 0 -1 0 slow
		chk_join_nr 1 1 1
		chk_add_nr 1 1
		chk_rm_nr 1 1 invert
	fi

	# subflow and signal, remove
	if reset "remove subflow and signal"; then
		pm_nl_set_limits $ns1 0 2
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		pm_nl_set_limits $ns2 1 2
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 0 -1 -1 slow
		chk_join_nr 2 2 2
		chk_add_nr 1 1
		chk_rm_nr 1 1
	fi

	# subflows and signal, remove
	if reset "remove subflows and signal"; then
		pm_nl_set_limits $ns1 0 3
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		pm_nl_set_limits $ns2 1 3
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		pm_nl_add_endpoint $ns2 10.0.4.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 0 -1 -2 speed_10
		chk_join_nr 3 3 3
		chk_add_nr 1 1
		chk_rm_nr 2 2
	fi

	# addresses remove
	if reset "remove addresses"; then
		pm_nl_set_limits $ns1 3 3
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal id 250
		pm_nl_add_endpoint $ns1 10.0.3.1 flags signal
		pm_nl_add_endpoint $ns1 10.0.4.1 flags signal
		pm_nl_set_limits $ns2 3 3
		run_tests $ns1 $ns2 10.0.1.1 0 -3 0 speed_10
		chk_join_nr 3 3 3
		chk_add_nr 3 3
		chk_rm_nr 3 3 invert
	fi

	# invalid addresses remove
	if reset "remove invalid addresses"; then
		pm_nl_set_limits $ns1 3 3
		pm_nl_add_endpoint $ns1 10.0.12.1 flags signal
		pm_nl_add_endpoint $ns1 10.0.3.1 flags signal
		pm_nl_add_endpoint $ns1 10.0.14.1 flags signal
		pm_nl_set_limits $ns2 3 3
		run_tests $ns1 $ns2 10.0.1.1 0 -3 0 speed_10
		chk_join_nr 1 1 1
		chk_add_nr 3 3
		chk_rm_nr 3 1 invert
	fi

	# subflows and signal, flush
	if reset "flush subflows and signal"; then
		pm_nl_set_limits $ns1 0 3
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		pm_nl_set_limits $ns2 1 3
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		pm_nl_add_endpoint $ns2 10.0.4.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 0 -8 -8 slow
		chk_join_nr 3 3 3
		chk_add_nr 1 1
		chk_rm_nr 1 3 invert simult
	fi

	# subflows flush
	if reset "flush subflows"; then
		pm_nl_set_limits $ns1 3 3
		pm_nl_set_limits $ns2 3 3
		pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow id 150
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		pm_nl_add_endpoint $ns2 10.0.4.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 0 -8 -8 slow
		chk_join_nr 3 3 3
		chk_rm_nr 0 3 simult
	fi

	# addresses flush
	if reset "flush addresses"; then
		pm_nl_set_limits $ns1 3 3
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal id 250
		pm_nl_add_endpoint $ns1 10.0.3.1 flags signal
		pm_nl_add_endpoint $ns1 10.0.4.1 flags signal
		pm_nl_set_limits $ns2 3 3
		run_tests $ns1 $ns2 10.0.1.1 0 -8 -8 slow
		chk_join_nr 3 3 3
		chk_add_nr 3 3
		chk_rm_nr 3 3 invert simult
	fi

	# invalid addresses flush
	if reset "flush invalid addresses"; then
		pm_nl_set_limits $ns1 3 3
		pm_nl_add_endpoint $ns1 10.0.12.1 flags signal
		pm_nl_add_endpoint $ns1 10.0.3.1 flags signal
		pm_nl_add_endpoint $ns1 10.0.14.1 flags signal
		pm_nl_set_limits $ns2 3 3
		run_tests $ns1 $ns2 10.0.1.1 0 -8 0 slow
		chk_join_nr 1 1 1
		chk_add_nr 3 3
		chk_rm_nr 3 1 invert
	fi

	# remove id 0 subflow
	if reset "remove id 0 subflow"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 0 0 -9 slow
		chk_join_nr 1 1 1
		chk_rm_nr 1 1
	fi

	# remove id 0 address
	if reset "remove id 0 address"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		pm_nl_set_limits $ns2 1 1
		run_tests $ns1 $ns2 10.0.1.1 0 -9 0 slow
		chk_join_nr 1 1 1
		chk_add_nr 1 1
		chk_rm_nr 1 1 invert
	fi
}

add_tests()
{
	# add single subflow
	if reset "add single subflow"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		run_tests $ns1 $ns2 10.0.1.1 0 0 1 slow
		chk_join_nr 1 1 1
	fi

	# add signal address
	if reset "add signal address"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 1 1
		run_tests $ns1 $ns2 10.0.1.1 0 1 0 slow
		chk_join_nr 1 1 1
		chk_add_nr 1 1
	fi

	# add multiple subflows
	if reset "add multiple subflows"; then
		pm_nl_set_limits $ns1 0 2
		pm_nl_set_limits $ns2 0 2
		run_tests $ns1 $ns2 10.0.1.1 0 0 2 slow
		chk_join_nr 2 2 2
	fi

	# add multiple subflows IPv6
	if reset "add multiple subflows IPv6"; then
		pm_nl_set_limits $ns1 0 2
		pm_nl_set_limits $ns2 0 2
		run_tests $ns1 $ns2 dead:beef:1::1 0 0 2 slow
		chk_join_nr 2 2 2
	fi

	# add multiple addresses IPv6
	if reset "add multiple addresses IPv6"; then
		pm_nl_set_limits $ns1 0 2
		pm_nl_set_limits $ns2 2 2
		run_tests $ns1 $ns2 dead:beef:1::1 0 2 0 slow
		chk_join_nr 2 2 2
		chk_add_nr 2 2
	fi
}

ipv6_tests()
{
	# subflow IPv6
	if reset "single subflow IPv6"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 dead:beef:3::2 dev ns2eth3 flags subflow
		run_tests $ns1 $ns2 dead:beef:1::1 0 0 0 slow
		chk_join_nr 1 1 1
	fi

	# add_address, unused IPv6
	if reset "unused signal address IPv6"; then
		pm_nl_add_endpoint $ns1 dead:beef:2::1 flags signal
		run_tests $ns1 $ns2 dead:beef:1::1 0 0 0 slow
		chk_join_nr 0 0 0
		chk_add_nr 1 1
	fi

	# signal address IPv6
	if reset "single address IPv6"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_add_endpoint $ns1 dead:beef:2::1 flags signal
		pm_nl_set_limits $ns2 1 1
		run_tests $ns1 $ns2 dead:beef:1::1 0 0 0 slow
		chk_join_nr 1 1 1
		chk_add_nr 1 1
	fi

	# single address IPv6, remove
	if reset "remove single address IPv6"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_add_endpoint $ns1 dead:beef:2::1 flags signal
		pm_nl_set_limits $ns2 1 1
		run_tests $ns1 $ns2 dead:beef:1::1 0 -1 0 slow
		chk_join_nr 1 1 1
		chk_add_nr 1 1
		chk_rm_nr 1 1 invert
	fi

	# subflow and signal IPv6, remove
	if reset "remove subflow and signal IPv6"; then
		pm_nl_set_limits $ns1 0 2
		pm_nl_add_endpoint $ns1 dead:beef:2::1 flags signal
		pm_nl_set_limits $ns2 1 2
		pm_nl_add_endpoint $ns2 dead:beef:3::2 dev ns2eth3 flags subflow
		run_tests $ns1 $ns2 dead:beef:1::1 0 -1 -1 slow
		chk_join_nr 2 2 2
		chk_add_nr 1 1
		chk_rm_nr 1 1
	fi
}

v4mapped_tests()
{
	# subflow IPv4-mapped to IPv4-mapped
	if reset "single subflow IPv4-mapped"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 "::ffff:10.0.3.2" flags subflow
		run_tests $ns1 $ns2 "::ffff:10.0.1.1"
		chk_join_nr 1 1 1
	fi

	# signal address IPv4-mapped with IPv4-mapped sk
	if reset "signal address IPv4-mapped"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 1 1
		pm_nl_add_endpoint $ns1 "::ffff:10.0.2.1" flags signal
		run_tests $ns1 $ns2 "::ffff:10.0.1.1"
		chk_join_nr 1 1 1
		chk_add_nr 1 1
	fi

	# subflow v4-map-v6
	if reset "single subflow v4-map-v6"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 "::ffff:10.0.1.1"
		chk_join_nr 1 1 1
	fi

	# signal address v4-map-v6
	if reset "signal address v4-map-v6"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 1 1
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		run_tests $ns1 $ns2 "::ffff:10.0.1.1"
		chk_join_nr 1 1 1
		chk_add_nr 1 1
	fi

	# subflow v6-map-v4
	if reset "single subflow v6-map-v4"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 "::ffff:10.0.3.2" flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 1 1 1
	fi

	# signal address v6-map-v4
	if reset "signal address v6-map-v4"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 1 1
		pm_nl_add_endpoint $ns1 "::ffff:10.0.2.1" flags signal
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 1 1 1
		chk_add_nr 1 1
	fi

	# no subflow IPv6 to v4 address
	if reset "no JOIN with diff families v4-v6"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 dead:beef:2::2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 0 0 0
	fi

	# no subflow IPv6 to v4 address even if v6 has a valid v4 at the end
	if reset "no JOIN with diff families v4-v6-2"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 dead:beef:2::10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 0 0 0
	fi

	# no subflow IPv4 to v6 address, no need to slow down too then
	if reset "no JOIN with diff families v6-v4"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 dead:beef:1::1
		chk_join_nr 0 0 0
	fi
}

backup_tests()
{
	# single subflow, backup
	if reset "single subflow, backup"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow,backup
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow nobackup
		chk_join_nr 1 1 1
		chk_prio_nr 0 1
	fi

	# single address, backup
	if reset "single address, backup"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		pm_nl_set_limits $ns2 1 1
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow backup
		chk_join_nr 1 1 1
		chk_add_nr 1 1
		chk_prio_nr 1 1
	fi

	# single address with port, backup
	if reset "single address with port, backup"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal port 10100
		pm_nl_set_limits $ns2 1 1
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow backup
		chk_join_nr 1 1 1
		chk_add_nr 1 1
		chk_prio_nr 1 1
	fi

	if reset "mpc backup"; then
		pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow,backup
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow
		chk_join_nr 0 0 0
		chk_prio_nr 0 1
	fi

	if reset "mpc backup both sides"; then
		pm_nl_add_endpoint $ns1 10.0.1.1 flags subflow,backup
		pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow,backup
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow
		chk_join_nr 0 0 0
		chk_prio_nr 1 1
	fi

	if reset "mpc switch to backup"; then
		pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow backup
		chk_join_nr 0 0 0
		chk_prio_nr 0 1
	fi

	if reset "mpc switch to backup both sides"; then
		pm_nl_add_endpoint $ns1 10.0.1.1 flags subflow
		pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow backup
		chk_join_nr 0 0 0
		chk_prio_nr 1 1
	fi
}

add_addr_ports_tests()
{
	# signal address with port
	if reset "signal address with port"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 1 1
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal port 10100
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 1 1 1
		chk_add_nr 1 1 1
	fi

	# subflow and signal with port
	if reset "subflow and signal with port"; then
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal port 10100
		pm_nl_set_limits $ns1 0 2
		pm_nl_set_limits $ns2 1 2
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 2 2 2
		chk_add_nr 1 1 1
	fi

	# single address with port, remove
	if reset "remove single address with port"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal port 10100
		pm_nl_set_limits $ns2 1 1
		run_tests $ns1 $ns2 10.0.1.1 0 -1 0 slow
		chk_join_nr 1 1 1
		chk_add_nr 1 1 1
		chk_rm_nr 1 1 invert
	fi

	# subflow and signal with port, remove
	if reset "remove subflow and signal with port"; then
		pm_nl_set_limits $ns1 0 2
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal port 10100
		pm_nl_set_limits $ns2 1 2
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 0 -1 -1 slow
		chk_join_nr 2 2 2
		chk_add_nr 1 1 1
		chk_rm_nr 1 1
	fi

	# subflows and signal with port, flush
	if reset "flush subflows and signal with port"; then
		pm_nl_set_limits $ns1 0 3
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal port 10100
		pm_nl_set_limits $ns2 1 3
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		pm_nl_add_endpoint $ns2 10.0.4.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 0 -8 -2 slow
		chk_join_nr 3 3 3
		chk_add_nr 1 1
		chk_rm_nr 1 3 invert simult
	fi

	# multiple addresses with port
	if reset "multiple addresses with port"; then
		pm_nl_set_limits $ns1 2 2
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal port 10100
		pm_nl_add_endpoint $ns1 10.0.3.1 flags signal port 10100
		pm_nl_set_limits $ns2 2 2
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 2 2 2
		chk_add_nr 2 2 2
	fi

	# multiple addresses with ports
	if reset "multiple addresses with ports"; then
		pm_nl_set_limits $ns1 2 2
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal port 10100
		pm_nl_add_endpoint $ns1 10.0.3.1 flags signal port 10101
		pm_nl_set_limits $ns2 2 2
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 2 2 2
		chk_add_nr 2 2 2
	fi
}

syncookies_tests()
{
	# single subflow, syncookies
	if reset_with_cookies "single subflow with syn cookies"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 1 1 1
	fi

	# multiple subflows with syn cookies
	if reset_with_cookies "multiple subflows with syn cookies"; then
		pm_nl_set_limits $ns1 0 2
		pm_nl_set_limits $ns2 0 2
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 2 2 2
	fi

	# multiple subflows limited by server
	if reset_with_cookies "subflows limited by server w cookies"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 2
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 2 1 1
	fi

	# test signal address with cookies
	if reset_with_cookies "signal address with syn cookies"; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 1 1
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 1 1 1
		chk_add_nr 1 1
	fi

	# test cookie with subflow and signal
	if reset_with_cookies "subflow and signal w cookies"; then
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		pm_nl_set_limits $ns1 0 2
		pm_nl_set_limits $ns2 1 2
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 2 2 2
		chk_add_nr 1 1
	fi

	# accept and use add_addr with additional subflows
	if reset_with_cookies "subflows and signal w. cookies"; then
		pm_nl_set_limits $ns1 0 3
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		pm_nl_set_limits $ns2 1 3
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		pm_nl_add_endpoint $ns2 10.0.4.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 3 3 3
		chk_add_nr 1 1
	fi
}

checksum_tests()
{
	# checksum test 0 0
	if reset_with_checksum 0 0; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 0 0 0
	fi

	# checksum test 1 1
	if reset_with_checksum 1 1; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 0 0 0
	fi

	# checksum test 0 1
	if reset_with_checksum 0 1; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 0 0 0
	fi

	# checksum test 1 0
	if reset_with_checksum 1 0; then
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 0 0 0
	fi
}

deny_join_id0_tests()
{
	# subflow allow join id0 ns1
	if reset_with_allow_join_id0 "single subflow allow join id0 ns1" 1 0; then
		pm_nl_set_limits $ns1 1 1
		pm_nl_set_limits $ns2 1 1
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 1 1 1
	fi

	# subflow allow join id0 ns2
	if reset_with_allow_join_id0 "single subflow allow join id0 ns2" 0 1; then
		pm_nl_set_limits $ns1 1 1
		pm_nl_set_limits $ns2 1 1
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 0 0 0
	fi

	# signal address allow join id0 ns1
	# ADD_ADDRs are not affected by allow_join_id0 value.
	if reset_with_allow_join_id0 "signal address allow join id0 ns1" 1 0; then
		pm_nl_set_limits $ns1 1 1
		pm_nl_set_limits $ns2 1 1
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 1 1 1
		chk_add_nr 1 1
	fi

	# signal address allow join id0 ns2
	# ADD_ADDRs are not affected by allow_join_id0 value.
	if reset_with_allow_join_id0 "signal address allow join id0 ns2" 0 1; then
		pm_nl_set_limits $ns1 1 1
		pm_nl_set_limits $ns2 1 1
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 1 1 1
		chk_add_nr 1 1
	fi

	# subflow and address allow join id0 ns1
	if reset_with_allow_join_id0 "subflow and address allow join id0 1" 1 0; then
		pm_nl_set_limits $ns1 2 2
		pm_nl_set_limits $ns2 2 2
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 2 2 2
	fi

	# subflow and address allow join id0 ns2
	if reset_with_allow_join_id0 "subflow and address allow join id0 2" 0 1; then
		pm_nl_set_limits $ns1 2 2
		pm_nl_set_limits $ns2 2 2
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 1 1 1
	fi
}

fullmesh_tests()
{
	# fullmesh 1
	# 2 fullmesh addrs in ns2, added before the connection,
	# 1 non-fullmesh addr in ns1, added during the connection.
	if reset "fullmesh test 2x1"; then
		pm_nl_set_limits $ns1 0 4
		pm_nl_set_limits $ns2 1 4
		pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow,fullmesh
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow,fullmesh
		run_tests $ns1 $ns2 10.0.1.1 0 1 0 slow
		chk_join_nr 4 4 4
		chk_add_nr 1 1
	fi

	# fullmesh 2
	# 1 non-fullmesh addr in ns1, added before the connection,
	# 1 fullmesh addr in ns2, added during the connection.
	if reset "fullmesh test 1x1"; then
		pm_nl_set_limits $ns1 1 3
		pm_nl_set_limits $ns2 1 3
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		run_tests $ns1 $ns2 10.0.1.1 0 0 fullmesh_1 slow
		chk_join_nr 3 3 3
		chk_add_nr 1 1
	fi

	# fullmesh 3
	# 1 non-fullmesh addr in ns1, added before the connection,
	# 2 fullmesh addrs in ns2, added during the connection.
	if reset "fullmesh test 1x2"; then
		pm_nl_set_limits $ns1 2 5
		pm_nl_set_limits $ns2 1 5
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		run_tests $ns1 $ns2 10.0.1.1 0 0 fullmesh_2 slow
		chk_join_nr 5 5 5
		chk_add_nr 1 1
	fi

	# fullmesh 4
	# 1 non-fullmesh addr in ns1, added before the connection,
	# 2 fullmesh addrs in ns2, added during the connection,
	# limit max_subflows to 4.
	if reset "fullmesh test 1x2, limited"; then
		pm_nl_set_limits $ns1 2 4
		pm_nl_set_limits $ns2 1 4
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		run_tests $ns1 $ns2 10.0.1.1 0 0 fullmesh_2 slow
		chk_join_nr 4 4 4
		chk_add_nr 1 1
	fi

	# set fullmesh flag
	if reset "set fullmesh flag test"; then
		pm_nl_set_limits $ns1 4 4
		pm_nl_add_endpoint $ns1 10.0.2.1 flags subflow
		pm_nl_set_limits $ns2 4 4
		run_tests $ns1 $ns2 10.0.1.1 0 0 1 slow fullmesh
		chk_join_nr 2 2 2
		chk_rm_nr 0 1
	fi

	# set nofullmesh flag
	if reset "set nofullmesh flag test"; then
		pm_nl_set_limits $ns1 4 4
		pm_nl_add_endpoint $ns1 10.0.2.1 flags subflow,fullmesh
		pm_nl_set_limits $ns2 4 4
		run_tests $ns1 $ns2 10.0.1.1 0 0 fullmesh_1 slow nofullmesh
		chk_join_nr 2 2 2
		chk_rm_nr 0 1
	fi

	# set backup,fullmesh flags
	if reset "set backup,fullmesh flags test"; then
		pm_nl_set_limits $ns1 4 4
		pm_nl_add_endpoint $ns1 10.0.2.1 flags subflow
		pm_nl_set_limits $ns2 4 4
		run_tests $ns1 $ns2 10.0.1.1 0 0 1 slow backup,fullmesh
		chk_join_nr 2 2 2
		chk_prio_nr 0 1
		chk_rm_nr 0 1
	fi

	# set nobackup,nofullmesh flags
	if reset "set nobackup,nofullmesh flags test"; then
		pm_nl_set_limits $ns1 4 4
		pm_nl_set_limits $ns2 4 4
		pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow,backup,fullmesh
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow nobackup,nofullmesh
		chk_join_nr 2 2 2
		chk_prio_nr 0 1
		chk_rm_nr 0 1
	fi
}

fastclose_tests()
{
	if reset "fastclose test"; then
		run_tests $ns1 $ns2 10.0.1.1 1024 0 fastclose_client
		chk_join_nr 0 0 0
		chk_fclose_nr 1 1
		chk_rst_nr 1 1 invert
	fi

	if reset "fastclose server test"; then
		run_tests $ns1 $ns2 10.0.1.1 1024 0 fastclose_server
		chk_join_nr 0 0 0
		chk_fclose_nr 1 1 invert
		chk_rst_nr 1 1
	fi
}

pedit_action_pkts()
{
	tc -n $ns2 -j -s action show action pedit index 100 | \
		grep "packets" | \
		sed 's/.*"packets":\([0-9]\+\),.*/\1/'
}

fail_tests()
{
	# single subflow
	if reset_with_fail "Infinite map" 1; then
		run_tests $ns1 $ns2 10.0.1.1 128
		chk_join_nr 0 0 0 +1 +0 1 0 1 "$(pedit_action_pkts)"
		chk_fail_nr 1 -1 invert
	fi

	# multiple subflows
	if reset_with_fail "MP_FAIL MP_RST" 2; then
		tc -n $ns2 qdisc add dev ns2eth1 root netem rate 1mbit delay 5
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 10.0.2.2 dev ns2eth2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 1024
		chk_join_nr 1 1 1 1 0 1 1 0 "$(pedit_action_pkts)"
	fi
}

userspace_tests()
{
	# userspace pm type prevents add_addr
	if reset "userspace pm type prevents add_addr"; then
		set_userspace_pm $ns1
		pm_nl_set_limits $ns1 0 2
		pm_nl_set_limits $ns2 0 2
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 0 0 0
		chk_add_nr 0 0
	fi

	# userspace pm type does not echo add_addr without daemon
	if reset "userspace pm no echo w/o daemon"; then
		set_userspace_pm $ns2
		pm_nl_set_limits $ns1 0 2
		pm_nl_set_limits $ns2 0 2
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 0 0 0
		chk_add_nr 1 0
	fi

	# userspace pm type rejects join
	if reset "userspace pm type rejects join"; then
		set_userspace_pm $ns1
		pm_nl_set_limits $ns1 1 1
		pm_nl_set_limits $ns2 1 1
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 1 1 0
	fi

	# userspace pm type does not send join
	if reset "userspace pm type does not send join"; then
		set_userspace_pm $ns2
		pm_nl_set_limits $ns1 1 1
		pm_nl_set_limits $ns2 1 1
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1
		chk_join_nr 0 0 0
	fi

	# userspace pm type prevents mp_prio
	if reset "userspace pm type prevents mp_prio"; then
		set_userspace_pm $ns1
		pm_nl_set_limits $ns1 1 1
		pm_nl_set_limits $ns2 1 1
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow backup
		chk_join_nr 1 1 0
		chk_prio_nr 0 0
	fi

	# userspace pm type prevents rm_addr
	if reset "userspace pm type prevents rm_addr"; then
		set_userspace_pm $ns1
		set_userspace_pm $ns2
		pm_nl_set_limits $ns1 0 1
		pm_nl_set_limits $ns2 0 1
		pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 0 0 -1 slow
		chk_join_nr 0 0 0
		chk_rm_nr 0 0
	fi

	# userspace pm add & remove address
	if reset "userspace pm add & remove address"; then
		set_userspace_pm $ns1
		pm_nl_set_limits $ns2 1 1
		run_tests $ns1 $ns2 10.0.1.1 0 userspace_1 0 slow
		chk_join_nr 1 1 1
		chk_add_nr 1 1
		chk_rm_nr 1 1 invert
	fi

	# userspace pm create destroy subflow
	if reset "userspace pm create destroy subflow"; then
		set_userspace_pm $ns2
		pm_nl_set_limits $ns1 0 1
		run_tests $ns1 $ns2 10.0.1.1 0 0 userspace_1 slow
		chk_join_nr 1 1 1
		chk_rm_nr 0 1
	fi
}

endpoint_tests()
{
	# userspace pm type prevents add_addr
	if reset "implicit EP"; then
		pm_nl_set_limits $ns1 2 2
		pm_nl_set_limits $ns2 2 2
		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow &

		wait_mpj $ns1
		pm_nl_check_endpoint 1 "creation" \
			$ns2 10.0.2.2 id 1 flags implicit

		pm_nl_add_endpoint $ns2 10.0.2.2 id 33
		pm_nl_check_endpoint 0 "ID change is prevented" \
			$ns2 10.0.2.2 id 1 flags implicit

		pm_nl_add_endpoint $ns2 10.0.2.2 flags signal
		pm_nl_check_endpoint 0 "modif is allowed" \
			$ns2 10.0.2.2 id 1 flags signal
		wait
	fi

	if reset "delete and re-add"; then
		pm_nl_set_limits $ns1 1 1
		pm_nl_set_limits $ns2 1 1
		pm_nl_add_endpoint $ns2 10.0.2.2 id 2 dev ns2eth2 flags subflow
		run_tests $ns1 $ns2 10.0.1.1 4 0 0 slow &

		wait_mpj $ns2
		pm_nl_del_endpoint $ns2 2 10.0.2.2
		sleep 0.5
		chk_subflow_nr needtitle "after delete" 1

		pm_nl_add_endpoint $ns2 10.0.2.2 dev ns2eth2 flags subflow
		wait_mpj $ns2
		chk_subflow_nr "" "after re-add" 2
		wait
	fi
}

# [$1: error message]
usage()
{
	if [ -n "${1}" ]; then
		echo "${1}"
		ret=1
	fi

	echo "mptcp_join usage:"

	local key
	for key in "${!all_tests[@]}"; do
		echo "  -${key} ${all_tests[${key}]}"
	done

	echo "  -c capture pcap files"
	echo "  -C enable data checksum"
	echo "  -i use ip mptcp"
	echo "  -h help"

	echo "[test ids|names]"

	exit ${ret}
}


# Use a "simple" array to force an specific order we cannot have with an associative one
all_tests_sorted=(
	f@subflows_tests
	e@subflows_error_tests
	s@signal_address_tests
	l@link_failure_tests
	t@add_addr_timeout_tests
	r@remove_tests
	a@add_tests
	6@ipv6_tests
	4@v4mapped_tests
	b@backup_tests
	p@add_addr_ports_tests
	k@syncookies_tests
	S@checksum_tests
	d@deny_join_id0_tests
	m@fullmesh_tests
	z@fastclose_tests
	F@fail_tests
	u@userspace_tests
	I@endpoint_tests
)

all_tests_args=""
all_tests_names=()
for subtests in "${all_tests_sorted[@]}"; do
	key="${subtests%@*}"
	value="${subtests#*@}"

	all_tests_args+="${key}"
	all_tests_names+=("${value}")
	all_tests[${key}]="${value}"
done

tests=()
while getopts "${all_tests_args}cCih" opt; do
	case $opt in
		["${all_tests_args}"])
			tests+=("${all_tests[${opt}]}")
			;;
		c)
			capture=1
			;;
		C)
			checksum=1
			;;
		i)
			ip_mptcp=1
			;;
		h)
			usage
			;;
		*)
			usage "Unknown option: -${opt}"
			;;
	esac
done

shift $((OPTIND - 1))

for arg in "${@}"; do
	if [[ "${arg}" =~ ^[0-9]+$ ]]; then
		only_tests_ids+=("${arg}")
	else
		only_tests_names+=("${arg}")
	fi
done

if [ ${#tests[@]} -eq 0 ]; then
	tests=("${all_tests_names[@]}")
fi

for subtests in "${tests[@]}"; do
	"${subtests}"
done

if [ ${ret} -ne 0 ]; then
	echo
	echo "${#failed_tests[@]} failure(s) has(ve) been detected:"
	for i in $(get_failed_tests_ids); do
		echo -e "\t- ${i}: ${failed_tests[${i}]}"
	done
	echo
fi

exit $ret