summaryrefslogtreecommitdiffstats
path: root/epan/dissectors/packet-couchbase.c
blob: 10de7a54df336d39fbdb518fcb5469df9c272994 (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
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
/* packet-couchbase.c
 *
 * Routines for Couchbase Protocol
 *
 * Copyright 2019, Trond Norbye <trond@couchbase.com>
 * Copyright 2018, Jim Walker <jim@couchbase.com>
 * Copyright 2015-2016, Dave Rigby <daver@couchbase.com>
 * Copyright 2011, Sergey Avseyev <sergey.avseyev@gmail.com>
 *
 * With contributions from Mark Woosey <mark@markwoosey.com>
 *
 *
 * Based on packet-memcache.c: mecmcache binary protocol.
 *
 * Routines for Memcache Binary Protocol
 * http://code.google.com/p/memcached/wiki/MemcacheBinaryProtocol
 *
 * Copyright 2009, Stig Bjorlykke <stig@bjorlykke.org>
 *
 * Routines for Memcache Textual Protocol
 * http://code.sixapart.com/svn/memcached/trunk/server/doc/protocol.txt
 *
 * Copyright 2009, Rama Chitta <rama@gear6.com>
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include "config.h"


#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/expert.h>

#ifdef HAVE_SNAPPY
#include <snappy-c.h>
#endif

#include "packet-tcp.h"
#include "packet-tls.h"

#include <math.h>

#define PNAME  "Couchbase Protocol"
#define PSNAME "Couchbase"
#define PFNAME "couchbase"

#define COUCHBASE_DEFAULT_PORT        "11210"
#define COUCHBASE_HEADER_LEN   24

/* Magic Byte */
enum {
  /**
   * The magic used for a normal request sent from the client to the
   * server. Layout described in:
   * https://github.com/couchbase/kv_engine/blob/master/docs/BinaryProtocol.md#request-header
   */
  MAGIC_CLIENT_REQUEST = 0x80,
  /**
   * The magic used for a normal response sent from the server to
   * the client. Layout described in:
   * https://github.com/couchbase/kv_engine/blob/master/docs/BinaryProtocol.md#response-header
   */
  MAGIC_CLIENT_RESPONSE = 0x81,
  /**
   * The magic used when the client want to inject a set of extensions
   * to the command sent to the server. Layout described in:
   * https://github.com/couchbase/kv_engine/blob/master/docs/BinaryProtocol.md#request-header-with-flexible-framing-extras
   */
  MAGIC_CLIENT_RESPONSE_FLEX = 0x18,
  /**
   * The magic used by the server when the server needs to inject a set of
   * extensions in the response packet. Layout described in:
   * https://github.com/couchbase/kv_engine/blob/master/docs/BinaryProtocol.md#response-header-with-flexible-framing-extras
   */
  MAGIC_CLIENT_REQUEST_FLEX = 0x08,
  /**
   * The magic used for server initiated push requests. These packets
   * use the same layout as client flex request packets (with a different
   * namespace for the frame id's)
   */
  MAGIC_SERVER_REQUEST = 0x82,
  /**
   * The magic used for responses to server initiated push requests. These
   * packets use the same layout as client flex response packet (with
   * a different namespace for the frame id's)
   */
  MAGIC_SERVER_RESPONSE = 0x83
};

/** Does the magic represent a flex encoded packet type */
static bool is_flex_encoded(guint8 magic) {
  switch (magic) {
    case MAGIC_CLIENT_RESPONSE_FLEX:
    case MAGIC_CLIENT_REQUEST_FLEX:
    case MAGIC_SERVER_REQUEST:
    case MAGIC_SERVER_RESPONSE:
      return TRUE;

    case MAGIC_CLIENT_REQUEST:
    case MAGIC_CLIENT_RESPONSE:
    default:
      return FALSE;
  }
}

/** Does the magic represent server initiated packet types */
static bool is_server_magic(guint8 magic) {
  switch (magic) {
    case MAGIC_SERVER_REQUEST:
    case MAGIC_SERVER_RESPONSE:
      return TRUE;

    case MAGIC_CLIENT_RESPONSE_FLEX:
    case MAGIC_CLIENT_REQUEST_FLEX:
    case MAGIC_CLIENT_REQUEST:
    case MAGIC_CLIENT_RESPONSE:
    default:
      return FALSE;
  }
}

/** Does the magic represent a request or a response */
static bool is_request_magic(guint8 magic) {
  switch (magic) {
    case MAGIC_SERVER_REQUEST:
    case MAGIC_CLIENT_REQUEST_FLEX:
    case MAGIC_CLIENT_REQUEST:
      return TRUE;

    case MAGIC_SERVER_RESPONSE:
    case MAGIC_CLIENT_RESPONSE_FLEX:
    case MAGIC_CLIENT_RESPONSE:
    default:
      return FALSE;
  }
}

 /* Response Status */
#define STATUS_SUCCESS            0x00
#define STATUS_KEY_ENOENT         0x01
#define STATUS_KEY_EEXISTS        0x02
#define STATUS_E2BIG              0x03
#define STATUS_EINVAL             0x04
#define STATUS_NOT_STORED         0x05
#define STATUS_DELTA_BADVAL       0x06
#define STATUS_NOT_MY_VBUCKET     0x07
#define STATUS_NO_VBUCKET         0x08
#define STATUS_LOCKED             0x09
#define STATUS_DCP_STREAM_NOT_FOUND 0x0a
#define STATUS_OPAQUE_NO_MATCH    0x0b
#define STATUS_EWOULDTHROTTLE     0x0c
#define STATUS_ECONFIGONLY        0x0d
#define STATUS_AUTH_STALE         0x1f
#define STATUS_AUTH_ERROR         0x20
#define STATUS_AUTH_CONTINUE      0x21
#define STATUS_ERANGE             0x22
#define STATUS_ROLLBACK           0x23
#define STATUS_EACCESS            0x24
#define STATUS_NOT_INITIALIZED    0x25
#define STATUS_RATELIMITED_NETWORK_INGRESS 0x30
#define STATUS_RATELIMITED_NETWORK_EGRESS 0x31
#define STATUS_RATELIMITED_MAX_CONNECTIONS 0x32
#define STATUS_RATELIMITED_MAX_COMMANDS 0x33
#define STATUS_SCOPE_SIZE_LIMIT_EXCEEDED 0x34
#define STATUS_UNKNOWN_COMMAND    0x81
#define STATUS_ENOMEM             0x82
#define STATUS_NOT_SUPPORTED      0x83
#define STATUS_EINTERNAL          0x84
#define STATUS_EBUSY              0x85
#define STATUS_ETMPFAIL           0x86
#define STATUS_XATTR_EINVAL       0x87
#define STATUS_UNKNOWN_COLLECTION         0x88
#define STATUS_NO_COLLECTIONS_MANIFEST    0x89
#define STATUS_CANNOT_APPLY_MANIFEST      0x8a
#define STATUS_MANIFEST_IS_AHEAD          0x8b
#define STATUS_UNKNOWN_SCOPE              0x8c
#define STATUS_DCP_STREAMID_INVALID       0x8d
#define STATUS_DURABILITY_INVALID_LEVEL         0xa0
#define STATUS_DURABILITY_IMPOSSIBLE            0xa1
#define STATUS_SYNC_WRITE_IN_PROGRESS           0xa2
#define STATUS_SYNC_WRITE_AMBIGUOUS             0xa3
#define STATUS_SYNC_WRITE_RECOMMIT_IN_PROGRESS  0xa4
#define STATUS_RANGE_SCAN_CANCELLED 0xa5
#define STATUS_RANGE_SCAN_MORE 0xa6
#define STATUS_RANGE_SCAN_COMPLETE 0xa7
#define STATUS_VBUUID_NOT_EQUAL 0xa8
#define STATUS_SUBDOC_PATH_ENOENT         0xc0
#define STATUS_SUBDOC_PATH_MISMATCH       0xc1
#define STATUS_SUBDOC_PATH_EINVAL         0xc2
#define STATUS_SUBDOC_PATH_E2BIG          0xc3
#define STATUS_SUBDOC_DOC_E2DEEP          0xc4
#define STATUS_SUBDOC_VALUE_CANTINSERT    0xc5
#define STATUS_SUBDOC_DOC_NOTJSON         0xc6
#define STATUS_SUBDOC_NUM_ERANGE          0xc7
#define STATUS_SUBDOC_DELTA_ERANGE        0xc8
#define STATUS_SUBDOC_PATH_EEXISTS        0xc9
#define STATUS_SUBDOC_VALUE_ETOODEEP      0xca
#define STATUS_SUBDOC_INVALID_COMBO       0xcb
#define STATUS_SUBDOC_MULTI_PATH_FAILURE  0xcc
#define STATUS_SUBDOC_SUCCESS_DELETED            0xcd
#define STATUS_SUBDOC_XATTR_INVALID_FLAG_COMBO   0xce
#define STATUS_SUBDOC_XATTR_INVALID_KEY_COMBO    0xcf
#define STATUS_SUBDOC_XATTR_UNKNOWN_MACRO        0xd0
#define STATUS_SUBDOC_XATTR_UNKNOWN_VATTR        0xd1
#define STATUS_SUBDOC_XATTR_CANT_MODIFY_VATTR    0xd2
#define STATUS_SUBDOC_MULTI_PATH_FAILURE_DELETED 0xd3
#define STATUS_SUBDOC_INVALID_XATTR_ORDER        0xd4
#define STATUS_SUBDOC_XATTR_UNKNOWN_VATTR_MACRO  0xd5
#define STATUS_SUBDOC_CAN_ONLY_REVIVE_DELETED_DOCUMENTS 0xd6
#define STATUS_SUBDOC_DELETED_DOCUMENT_CANT_HAVE_VALUE  0xd7

 /* Command Opcodes */
#define CLIENT_OPCODE_GET                     0x00
#define CLIENT_OPCODE_SET                     0x01
#define CLIENT_OPCODE_ADD                     0x02
#define CLIENT_OPCODE_REPLACE                 0x03
#define CLIENT_OPCODE_DELETE                  0x04
#define CLIENT_OPCODE_INCREMENT               0x05
#define CLIENT_OPCODE_DECREMENT               0x06
#define CLIENT_OPCODE_QUIT                    0x07
#define CLIENT_OPCODE_FLUSH                   0x08
#define CLIENT_OPCODE_GETQ                    0x09
#define CLIENT_OPCODE_NOOP                    0x0a
#define CLIENT_OPCODE_VERSION                 0x0b
#define CLIENT_OPCODE_GETK                    0x0c
#define CLIENT_OPCODE_GETKQ                   0x0d
#define CLIENT_OPCODE_APPEND                  0x0e
#define CLIENT_OPCODE_PREPEND                 0x0f
#define CLIENT_OPCODE_STAT                    0x10
#define CLIENT_OPCODE_SETQ                    0x11
#define CLIENT_OPCODE_ADDQ                    0x12
#define CLIENT_OPCODE_REPLACEQ                0x13
#define CLIENT_OPCODE_DELETEQ                 0x14
#define CLIENT_OPCODE_INCREMENTQ              0x15
#define CLIENT_OPCODE_DECREMENTQ              0x16
#define CLIENT_OPCODE_QUITQ                   0x17
#define CLIENT_OPCODE_FLUSHQ                  0x18
#define CLIENT_OPCODE_APPENDQ                 0x19
#define CLIENT_OPCODE_PREPENDQ                0x1a
#define CLIENT_OPCODE_VERBOSITY               0x1b
#define CLIENT_OPCODE_TOUCH                   0x1c
#define CLIENT_OPCODE_GAT                     0x1d
#define CLIENT_OPCODE_GATQ                    0x1e
#define CLIENT_OPCODE_HELLO                   0x1f

 /* SASL operations */
#define CLIENT_OPCODE_SASL_LIST_MECHS         0x20
#define CLIENT_OPCODE_SASL_AUTH               0x21
#define CLIENT_OPCODE_SASL_STEP               0x22

/* Control */
#define CLIENT_OPCODE_IOCTL_GET               0x23
#define CLIENT_OPCODE_IOCTL_SET               0x24
#define CLIENT_OPCODE_CONFIG_VALIDATE         0x25
#define CLIENT_OPCODE_CONFIG_RELOAD           0x26
#define CLIENT_OPCODE_AUDIT_PUT               0x27
#define CLIENT_OPCODE_AUDIT_CONFIG_RELOAD     0x28
#define CLIENT_OPCODE_SHUTDOWN                0x29

 /* Range operations.
  * These commands are used for range operations and exist within
  * protocol_binary.h for use in other projects. Range operations are
  * not expected to be implemented in the memcached server itself.
  */
#define CLIENT_OPCODE_RGET                    0x30
#define CLIENT_OPCODE_RSET                    0x31
#define CLIENT_OPCODE_RSETQ                   0x32
#define CLIENT_OPCODE_RAPPEND                 0x33
#define CLIENT_OPCODE_RAPPENDQ                0x34
#define CLIENT_OPCODE_RPREPEND                0x35
#define CLIENT_OPCODE_RPREPENDQ               0x36
#define CLIENT_OPCODE_RDELETE                 0x37
#define CLIENT_OPCODE_RDELETEQ                0x38
#define CLIENT_OPCODE_RINCR                   0x39
#define CLIENT_OPCODE_RINCRQ                  0x3a
#define CLIENT_OPCODE_RDECR                   0x3b
#define CLIENT_OPCODE_RDECRQ                  0x3c


 /* VBucket commands */
#define CLIENT_OPCODE_SET_VBUCKET             0x3d
#define CLIENT_OPCODE_GET_VBUCKET             0x3e
#define CLIENT_OPCODE_DEL_VBUCKET             0x3f

 /* TAP commands */
#define CLIENT_OPCODE_TAP_CONNECT             0x40
#define CLIENT_OPCODE_TAP_MUTATION            0x41
#define CLIENT_OPCODE_TAP_DELETE              0x42
#define CLIENT_OPCODE_TAP_FLUSH               0x43
#define CLIENT_OPCODE_TAP_OPAQUE              0x44
#define CLIENT_OPCODE_TAP_VBUCKET_SET         0x45
#define CLIENT_OPCODE_TAP_CHECKPOINT_START    0x46
#define CLIENT_OPCODE_TAP_CHECKPOINT_END      0x47

#define CLIENT_OPCODE_GET_ALL_VB_SEQNOS       0x48

/* DCP commands */
#define CLIENT_OPCODE_DCP_OPEN_CONNECTION         0x50
#define CLIENT_OPCODE_DCP_ADD_STREAM              0x51
#define CLIENT_OPCODE_DCP_CLOSE_STREAM            0x52
#define CLIENT_OPCODE_DCP_STREAM_REQUEST          0x53
#define CLIENT_OPCODE_DCP_FAILOVER_LOG_REQUEST    0x54
#define CLIENT_OPCODE_DCP_STREAM_END              0x55
#define CLIENT_OPCODE_DCP_SNAPSHOT_MARKER         0x56
#define CLIENT_OPCODE_DCP_MUTATION                0x57
#define CLIENT_OPCODE_DCP_DELETION                0x58
#define CLIENT_OPCODE_DCP_EXPIRATION              0x59
#define CLIENT_OPCODE_DCP_FLUSH                   0x5a
#define CLIENT_OPCODE_DCP_SET_VBUCKET_STATE       0x5b
#define CLIENT_OPCODE_DCP_NOOP                    0x5c
#define CLIENT_OPCODE_DCP_BUFFER_ACKNOWLEDGEMENT  0x5d
#define CLIENT_OPCODE_DCP_CONTROL                 0x5e
#define CLIENT_OPCODE_DCP_SYSTEM_EVENT            0x5f
#define CLIENT_OPCODE_DCP_PREPARE                 0x60
#define CLIENT_OPCODE_DCP_SEQNO_ACK               0x61
#define CLIENT_OPCODE_DCP_COMMIT                  0x62
#define CLIENT_OPCODE_DCP_ABORT                   0x63
#define CLIENT_OPCODE_DCP_SEQNO_ADVANCED          0x64
#define CLIENT_OPCODE_DCP_OSO_SNAPSHOT            0x65

 /* Commands from EP (eventually persistent) and bucket engines */
#define CLIENT_OPCODE_STOP_PERSISTENCE        0x80
#define CLIENT_OPCODE_START_PERSISTENCE       0x81
#define CLIENT_OPCODE_SET_PARAM               0x82
#define CLIENT_OPCODE_GET_REPLICA             0x83
#define CLIENT_OPCODE_CREATE_BUCKET           0x85
#define CLIENT_OPCODE_DELETE_BUCKET           0x86
#define CLIENT_OPCODE_LIST_BUCKETS            0x87
#define CLIENT_OPCODE_EXPAND_BUCKET           0x88
#define CLIENT_OPCODE_SELECT_BUCKET           0x89
#define CLIENT_OPCODE_START_REPLICATION       0x90
#define CLIENT_OPCODE_OBSERVE_SEQNO           0x91
#define CLIENT_OPCODE_OBSERVE                 0x92
#define CLIENT_OPCODE_EVICT_KEY               0x93
#define CLIENT_OPCODE_GET_LOCKED              0x94
#define CLIENT_OPCODE_UNLOCK_KEY              0x95
#define CLIENT_OPCODE_SYNC                    0x96
#define CLIENT_OPCODE_LAST_CLOSED_CHECKPOINT  0x97
#define CLIENT_OPCODE_RESTORE_FILE            0x98
#define CLIENT_OPCODE_RESTORE_ABORT           0x99
#define CLIENT_OPCODE_RESTORE_COMPLETE        0x9a
#define CLIENT_OPCODE_ONLINE_UPDATE_START     0x9b
#define CLIENT_OPCODE_ONLINE_UPDATE_COMPLETE  0x9c
#define CLIENT_OPCODE_ONLINE_UPDATE_REVERT    0x9d
#define CLIENT_OPCODE_DEREGISTER_TAP_CLIENT   0x9e
#define CLIENT_OPCODE_RESET_REPLICATION_CHAIN 0x9f
#define CLIENT_OPCODE_GET_META                0xa0
#define CLIENT_OPCODE_GETQ_META               0xa1
#define CLIENT_OPCODE_SET_WITH_META           0xa2
#define CLIENT_OPCODE_SETQ_WITH_META          0xa3
#define CLIENT_OPCODE_ADD_WITH_META           0xa4
#define CLIENT_OPCODE_ADDQ_WITH_META          0xa5
#define CLIENT_OPCODE_SNAPSHOT_VB_STATES      0xa6
#define CLIENT_OPCODE_VBUCKET_BATCH_COUNT     0xa7
#define CLIENT_OPCODE_DEL_WITH_META           0xa8
#define CLIENT_OPCODE_DELQ_WITH_META          0xa9
#define CLIENT_OPCODE_CREATE_CHECKPOINT       0xaa
#define CLIENT_OPCODE_NOTIFY_VBUCKET_UPDATE   0xac
#define CLIENT_OPCODE_ENABLE_TRAFFIC          0xad
#define CLIENT_OPCODE_DISABLE_TRAFFIC         0xae
#define CLIENT_OPCODE_IFCONFIG                0xaf
#define CLIENT_OPCODE_CHANGE_VB_FILTER        0xb0
#define CLIENT_OPCODE_CHECKPOINT_PERSISTENCE  0xb1
#define CLIENT_OPCODE_RETURN_META             0xb2
#define CLIENT_OPCODE_COMPACT_DB              0xb3


#define CLIENT_OPCODE_SET_CLUSTER_CONFIG      0xb4
#define CLIENT_OPCODE_GET_CLUSTER_CONFIG      0xb5
#define CLIENT_OPCODE_GET_RANDOM_KEY          0xb6
#define CLIENT_OPCODE_SEQNO_PERSISTENCE       0xb7
#define CLIENT_OPCODE_GET_KEYS                0xb8
#define CLIENT_OPCODE_COLLECTIONS_SET_MANIFEST 0xb9
#define CLIENT_OPCODE_COLLECTIONS_GET_MANIFEST 0xba
#define CLIENT_OPCODE_COLLECTIONS_GET_ID       0xbb
#define CLIENT_OPCODE_COLLECTIONS_GET_SCOPE_ID 0xbc

#define CLIENT_OPCODE_SET_DRIFT_COUNTER_STATE 0xc1
#define CLIENT_OPCODE_GET_ADJUSTED_TIME       0xc2

/* Sub-document API commands */
#define CLIENT_OPCODE_SUBDOC_GET              0xc5
#define CLIENT_OPCODE_SUBDOC_EXISTS           0xc6
#define CLIENT_OPCODE_SUBDOC_DICT_ADD         0xc7
#define CLIENT_OPCODE_SUBDOC_DICT_UPSERT      0xc8
#define CLIENT_OPCODE_SUBDOC_DELETE           0xc9
#define CLIENT_OPCODE_SUBDOC_REPLACE          0xca
#define CLIENT_OPCODE_SUBDOC_ARRAY_PUSH_LAST  0xcb
#define CLIENT_OPCODE_SUBDOC_ARRAY_PUSH_FIRST 0xcc
#define CLIENT_OPCODE_SUBDOC_ARRAY_INSERT     0xcd
#define CLIENT_OPCODE_SUBDOC_ARRAY_ADD_UNIQUE 0xce
#define CLIENT_OPCODE_SUBDOC_COUNTER          0xcf
#define CLIENT_OPCODE_SUBDOC_MULTI_LOOKUP     0xd0
#define CLIENT_OPCODE_SUBDOC_MULTI_MUTATION   0xd1
#define CLIENT_OPCODE_SUBDOC_GET_COUNT        0xd2
#define CLIENT_OPCODE_SUBDOC_REPLACE_BODY_WITH_XATTR 0xd3

#define CLIENT_OPCODE_RANGE_SCAN_CREATE       0xda
#define CLIENT_OPCODE_RANGE_SCAN_CONTINUE     0xdb
#define CLIENT_OPCODE_RANGE_SCAN_CANCEL       0xdc

#define CLIENT_OPCODE_SCRUB                   0xf0
#define CLIENT_OPCODE_ISASL_REFRESH           0xf1
#define CLIENT_OPCODE_SSL_CERTS_REFRESH       0xf2
#define CLIENT_OPCODE_GET_CMD_TIMER           0xf3
#define CLIENT_OPCODE_SET_CTRL_TOKEN          0xf4
#define CLIENT_OPCODE_GET_CTRL_TOKEN          0xf5
#define CLIENT_OPCODE_UPDATE_EXTERNAL_USER_PERMISSIONS 0xf6
#define CLIENT_OPCODE_RBAC_REFRESH            0xf7
#define CLIENT_OPCODE_AUTH_PROVIDER           0xf8
#define CLIENT_OPCODE_DROP_PRIVILEGE          0xfb
#define CLIENT_OPCODE_ADJUST_TIMEOFDAY        0xfc
#define CLIENT_OPCODE_EWOULDBLOCK_CTL         0xfd
#define CLIENT_OPCODE_GET_ERROR_MAP           0xfe

 /* vBucket states */
#define VBUCKET_ACTIVE                              0x01
#define VBUCKET_PENDING                             0x02
#define VBUCKET_REPLICA                             0x03
#define VBUCKET_DEAD                                0x04

 /* Data Types */
#define DT_RAW_BYTES          0x00
#define DT_JSON               0x01
#define DT_SNAPPY             0x02
#define DT_XATTR              0x04

void proto_register_couchbase(void);
void proto_reg_handoff_couchbase(void);

static int proto_couchbase = -1;

static int hf_magic = -1;
static int hf_opcode = -1;
static int hf_server_opcode = -1;
static int hf_extlength = -1;
static int hf_keylength = -1;
static int hf_value_length = -1;
static int hf_datatype = -1;
static int hf_datatype_json = -1;
static int hf_datatype_snappy = -1;
static int hf_datatype_xattr = -1;
static int hf_vbucket = -1;
static int hf_status = -1;
static int hf_total_bodylength = -1;
static int hf_opaque = -1;
static int hf_cas = -1;
static int hf_ttp = -1;
static int hf_ttr = -1;
static int hf_collection_key_id = -1;
static int hf_collection_key_logical = -1;
static int hf_collection_manifest_id = -1;

static int hf_flex_extras_length = -1;
static int hf_flex_keylength = -1;
static int hf_extras = -1;
static int hf_extras_flags = -1;
static int hf_extras_flags_backfill = -1;
static int hf_extras_flags_dump = -1;
static int hf_extras_flags_list_vbuckets = -1;
static int hf_extras_flags_takeover_vbuckets = -1;
static int hf_extras_flags_support_ack = -1;
static int hf_extras_flags_request_keys_only = -1;
static int hf_extras_flags_checkpoint = -1;
static int hf_extras_flags_dcp_connection_type = -1;
static int hf_extras_flags_dcp_add_stream_takeover = -1;
static int hf_extras_flags_dcp_add_stream_diskonly = -1;
static int hf_extras_flags_dcp_add_stream_latest = -1;
static int hf_extras_flags_dcp_snapshot_marker_memory = -1;
static int hf_extras_flags_dcp_snapshot_marker_disk = -1;
static int hf_extras_flags_dcp_snapshot_marker_chk = -1;
static int hf_extras_flags_dcp_snapshot_marker_ack = -1;
static int hf_extras_flags_dcp_snapshot_marker_history = -1;
static int hf_extras_flags_dcp_snapshot_marker_may_contain_dups = -1;
static int hf_extras_flags_dcp_include_xattrs = -1;
static int hf_extras_flags_dcp_no_value = -1;
static int hf_extras_flags_dcp_include_delete_times = -1;
static int hf_extras_flags_dcp_collections = -1;
static int hf_extras_flags_dcp_oso_snapshot_begin = -1;
static int hf_extras_flags_dcp_oso_snapshot_end = -1;
static int hf_subdoc_doc_flags = -1;
static int hf_subdoc_doc_flags_mkdoc = -1;
static int hf_subdoc_doc_flags_add = -1;
static int hf_subdoc_doc_flags_accessdeleted = -1;
static int hf_subdoc_doc_flags_createasdeleted = -1;
static int hf_subdoc_doc_flags_revivedocument = -1;
static int hf_subdoc_doc_flags_replicaread = -1;
static int hf_subdoc_doc_flags_reserved = -1;
static int hf_subdoc_flags = -1;
static int hf_subdoc_flags_mkdirp = -1;
static int hf_subdoc_flags_xattrpath = -1;
static int hf_subdoc_flags_expandmacros = -1;
static int hf_subdoc_flags_reserved = -1;
static int hf_extras_seqno = -1;
static int hf_extras_mutation_seqno = -1;
static int hf_extras_opaque = -1;
static int hf_extras_reserved = -1;
static int hf_extras_start_seqno = -1;
static int hf_extras_end_seqno = -1;
static int hf_extras_high_completed_seqno = -1;
static int hf_extras_max_visible_seqno = -1;
static int hf_extras_timestamp = -1;
static int hf_extras_marker_version = -1;
static int hf_extras_vbucket_uuid = -1;
static int hf_extras_snap_start_seqno = -1;
static int hf_extras_snap_end_seqno = -1;
static int hf_extras_expiration = -1;
static int hf_extras_delta = -1;
static int hf_extras_initial = -1;
static int hf_extras_unknown = -1;
static int hf_extras_by_seqno = -1;
static int hf_extras_rev_seqno = -1;
static int hf_extras_prepared_seqno = -1;
static int hf_extras_commit_seqno = -1;
static int hf_extras_abort_seqno = -1;
static int hf_extras_deleted = -1;
static int hf_extras_lock_time = -1;
static int hf_extras_nmeta = -1;
static int hf_extras_nru = -1;
static int hf_extras_bytes_to_ack = -1;
static int hf_extras_delete_time = -1;
static int hf_extras_delete_unused = -1;
static int hf_extras_system_event_id = -1;
static int hf_extras_system_event_version = -1;
static int hf_extras_pathlen = -1;
static int hf_extras_dcp_oso_snapshot_flags = -1;
static int hf_server_extras_cccp_epoch = -1;
static int hf_server_extras_cccp_revno = -1;
static int hf_server_clustermap_value = -1;
static int hf_server_authentication = -1;
static int hf_server_external_users = -1;
static int hf_server_get_authorization = -1;

static int hf_key = -1;
static int hf_path = -1;
static int hf_value = -1;
static int hf_uint64_response = -1;
static int hf_observe = -1;
static int hf_observe_vbucket = -1;
static int hf_observe_keylength = -1;
static int hf_observe_key = -1;
static int hf_observe_status = -1;
static int hf_observe_cas = -1;
static int hf_observe_vbucket_uuid = -1;
static int hf_observe_failed_over = -1;
static int hf_observe_last_persisted_seqno = -1;
static int hf_observe_current_seqno = -1;
static int hf_observe_old_vbucket_uuid = -1;
static int hf_observe_last_received_seqno = -1;

static int hf_get_errmap_version = -1;

static int hf_failover_log = -1;
static int hf_failover_log_size = -1;
static int hf_failover_log_vbucket_uuid = -1;
static int hf_failover_log_vbucket_seqno = -1;

static int hf_vbucket_states = -1;
static int hf_vbucket_states_state = -1;
static int hf_vbucket_states_size = -1;
static int hf_vbucket_states_id = -1;
static int hf_vbucket_states_seqno = -1;

static int hf_bucket_type = -1;
static int hf_bucket_config = -1;
static int hf_config_key = -1;
static int hf_config_value = -1;

static int hf_multipath_opcode = -1;
static int hf_multipath_index = -1;
static int hf_multipath_pathlen = -1;
static int hf_multipath_path = -1;
static int hf_multipath_valuelen = -1;
static int hf_multipath_value = -1;

static int hf_meta_flags = -1;
static int hf_meta_expiration = -1;
static int hf_meta_revseqno = -1;
static int hf_meta_cas = -1;
static int hf_skip_conflict = -1;
static int hf_force_accept = -1;
static int hf_regenerate_cas = -1;
static int hf_force_meta = -1;
static int hf_is_expiration = -1;
static int hf_meta_options = -1;
static int hf_metalen = -1;
static int hf_meta_reqextmeta = -1;
static int hf_meta_deleted = -1;
static int hf_exptime = -1;
static int hf_extras_meta_seqno = -1;
static int hf_confres = -1;
static int hf_hello_features = -1;
static int hf_hello_features_feature = -1;

static int hf_xattr_length = -1;
static int hf_xattr_pair_length = -1;
static int hf_xattr_key = -1;
static int hf_xattr_value = -1;
static int hf_xattrs = -1;

static int hf_flex_extras = -1;
static int hf_flex_extras_n = -1;
static int hf_flex_frame_id_byte0 = -1;
static int hf_flex_frame_id_req = -1;
static int hf_flex_frame_id_res = -1;
static int hf_flex_frame_id_req_esc = -1;
static int hf_flex_frame_id_res_esc = -1;
static int hf_flex_frame_len = -1;
static int hf_flex_frame_len_esc = -1;
static int hf_flex_frame_tracing_duration = -1;
static int hf_flex_frame_ru_count = -1;
static int hf_flex_frame_wu_count = -1;
static int hf_flex_frame_durability_req = -1;
static int hf_flex_frame_dcp_stream_id = -1;
static int hf_flex_frame_impersonated_user = -1;

static int hf_range_scan_uuid  = -1;
static int hf_range_scan_item_limit = -1;
static int hf_range_scan_time_limit = -1;
static int hf_range_scan_byte_limit = -1;

static expert_field ef_warn_shall_not_have_value = EI_INIT;
static expert_field ef_warn_shall_not_have_extras = EI_INIT;
static expert_field ef_warn_shall_not_have_key = EI_INIT;
static expert_field ef_compression_error = EI_INIT;
static expert_field ef_warn_unknown_flex_unsupported = EI_INIT;
static expert_field ef_warn_unknown_flex_id = EI_INIT;
static expert_field ef_warn_unknown_flex_len = EI_INIT;

static expert_field ei_value_missing = EI_INIT;
static expert_field ef_warn_must_have_extras = EI_INIT;
static expert_field ef_warn_must_have_key = EI_INIT;
static expert_field ef_warn_illegal_extras_length = EI_INIT;
static expert_field ef_warn_illegal_value_length = EI_INIT;
static expert_field ef_warn_unknown_magic_byte = EI_INIT;
static expert_field ef_warn_unknown_opcode = EI_INIT;
static expert_field ef_warn_unknown_extras = EI_INIT;
static expert_field ef_note_status_code = EI_INIT;
static expert_field ef_separator_not_found = EI_INIT;
static expert_field ef_illegal_value = EI_INIT;

static gint ett_couchbase = -1;
static gint ett_extras = -1;
static gint ett_extras_flags = -1;
static gint ett_observe = -1;
static gint ett_failover_log = -1;
static gint ett_vbucket_states = -1;
static gint ett_multipath = -1;
static gint ett_config = -1;
static gint ett_config_key = -1;
static gint ett_hello_features = -1;
static gint ett_datatype = -1;
static gint ett_xattrs = -1;
static gint ett_xattr_pair = -1;
static gint ett_flex_frame_extras = -1;
static gint ett_collection_key = -1;

static const value_string magic_vals[] = {
  { MAGIC_CLIENT_REQUEST, "Request" },
  { MAGIC_CLIENT_RESPONSE, "Response" },
  { MAGIC_CLIENT_RESPONSE_FLEX, "Response with flexible framing extras" },
  { MAGIC_CLIENT_REQUEST_FLEX, "Request with flexible framing extras" },
  { MAGIC_SERVER_REQUEST, "Server Request"},
  { MAGIC_SERVER_RESPONSE, "Server Response"},
  { 0, NULL }
};

#define FLEX_ESCAPE 0x0F

/*
  The flex extension identifiers are different for request/response
  i.e. 0 in a response is not 0 in a request
  Response IDs
 */
#define FLEX_RESPONSE_ID_RX_TX_DURATION 0
#define FLEX_RESPONSE_ID_RU_USAGE 1
#define FLEX_RESPONSE_ID_WU_USAGE 2

/* Request IDs */
#define FLEX_REQUEST_ID_REORDER 0
#define FLEX_REQUEST_ID_DURABILITY 1
#define FLEX_REQUEST_ID_DCP_STREAM_ID 2
#define FLEX_REQUEST_ID_OPEN_TRACING 3
#define FLEX_REQUEST_ID_IMPERSONATE 4
#define FLEX_REQUEST_ID_PRESERVE_TTL 5

static const value_string flex_frame_response_ids[] = {
  { FLEX_RESPONSE_ID_RX_TX_DURATION, "Server Recv->Send duration"},
  { FLEX_RESPONSE_ID_RU_USAGE, "Read units"},
  { FLEX_RESPONSE_ID_WU_USAGE, "Write units"},
  { 0, NULL }
};

static const value_string flex_frame_request_ids[] = {
  { FLEX_REQUEST_ID_REORDER, "Out of order Execution"},
  { FLEX_REQUEST_ID_DURABILITY, "Durability Requirements"},
  { FLEX_REQUEST_ID_DCP_STREAM_ID, "DCP Stream Identifier"},
  { FLEX_REQUEST_ID_OPEN_TRACING, "Open Tracing"},
  { FLEX_REQUEST_ID_IMPERSONATE, "Impersonate User"},
  { FLEX_REQUEST_ID_PRESERVE_TTL, "Preserve TTL"},
  { 0, NULL }
};

static const value_string flex_frame_durability_req[] = {
  { 1, "Majority"},
  { 2, "Majority and persist on active"},
  { 3, "Persist to majority"},
  { 0, NULL }
};

static const value_string status_vals[] = {
  { STATUS_SUCCESS,           "Success"                 },
  { STATUS_KEY_ENOENT,        "Key not found"           },
  { STATUS_KEY_EEXISTS,       "Key exists"              },
  { STATUS_E2BIG,             "Value too big"           },
  { STATUS_EINVAL,            "Invalid arguments"       },
  { STATUS_NOT_STORED,        "Key not stored"          },
  { STATUS_DELTA_BADVAL,      "Bad value to incr/decr"  },
  { STATUS_NOT_MY_VBUCKET,    "Not my vBucket"          },
  { STATUS_NO_VBUCKET,        "Not connected to a bucket" },
  { STATUS_LOCKED,            "The requested resource is locked" },
  { STATUS_DCP_STREAM_NOT_FOUND, "No DCP Stream for this request" },
  { STATUS_OPAQUE_NO_MATCH,   "Opaque does not match" },
  { STATUS_EWOULDTHROTTLE,    "Command would have been throttled" },
  { STATUS_ECONFIGONLY,       "Command can't be executed in config-only bucket" },
  { STATUS_AUTH_STALE,        "Authentication context is stale. Should reauthenticate." },
  { STATUS_AUTH_ERROR,        "Authentication error"    },
  { STATUS_AUTH_CONTINUE,     "Authentication continue" },
  { STATUS_ERANGE,            "Range error"             },
  { STATUS_ROLLBACK,          "Rollback"                },
  { STATUS_EACCESS,           "Access error"            },
  { STATUS_NOT_INITIALIZED,
    "The Couchbase cluster is currently initializing this node, and "
    "the Cluster manager has not yet granted all users access to the cluster."},
  { STATUS_RATELIMITED_NETWORK_INGRESS, "Rate limit: Network ingress"},
  { STATUS_RATELIMITED_NETWORK_EGRESS, "Rate limit: Network Egress"},
  { STATUS_RATELIMITED_MAX_CONNECTIONS, "Rate limit: Max Connections"},
  { STATUS_RATELIMITED_MAX_COMMANDS, "Rate limit: Max Commands"},
  {STATUS_SCOPE_SIZE_LIMIT_EXCEEDED, "To much data in Scope"},
  { STATUS_UNKNOWN_COMMAND,   "Unknown command"         },
  { STATUS_ENOMEM,            "Out of memory"           },
  { STATUS_NOT_SUPPORTED,     "Command isn't supported" },
  { STATUS_EINTERNAL,         "Internal error"          },
  { STATUS_EBUSY,             "Server is busy"          },
  { STATUS_ETMPFAIL,          "Temporary failure"       },
  { STATUS_XATTR_EINVAL,
    "There is something wrong with the syntax of the provided XATTR."},
  { STATUS_UNKNOWN_COLLECTION,
    "Operation attempted with an unknown collection."},
  { STATUS_NO_COLLECTIONS_MANIFEST,
    "No collections manifest has been set"},
  { STATUS_CANNOT_APPLY_MANIFEST,
    "Cannot apply the given manifest"},
  { STATUS_MANIFEST_IS_AHEAD,
    "Operation attempted with a manifest ahead of the server"},
  { STATUS_UNKNOWN_SCOPE,
    "Operation attempted with an unknown scope."},
  { STATUS_DCP_STREAMID_INVALID,
    "DCP Stream ID is invalid"},
  { STATUS_DURABILITY_INVALID_LEVEL,
    "The specified durability level is invalid" },
  { STATUS_DURABILITY_IMPOSSIBLE,
    "The specified durability requirements are not currently possible" },
  { STATUS_SYNC_WRITE_IN_PROGRESS,
    "A SyncWrite is already in progress on the specified key"},
  { STATUS_SYNC_WRITE_AMBIGUOUS,
    "The SyncWrite request has not completed in the specified time and has ambiguous result"},
  { STATUS_SYNC_WRITE_RECOMMIT_IN_PROGRESS,
    "The SyncWrite is being re-committed after a change in active node"},
  { STATUS_RANGE_SCAN_CANCELLED, "RangeScan was cancelled"},
  { STATUS_RANGE_SCAN_MORE, "RangeScan has more data available"},
  { STATUS_RANGE_SCAN_COMPLETE, "RangeScan has completed"},
  { STATUS_VBUUID_NOT_EQUAL, "VB UUID does not equal server value"},
  { STATUS_SUBDOC_PATH_ENOENT,
    "Subdoc: Path not does not exist"},
  { STATUS_SUBDOC_PATH_MISMATCH,
    "Subdoc: Path mismatch"},
  { STATUS_SUBDOC_PATH_EINVAL,
    "Subdoc: Invalid path"},
  { STATUS_SUBDOC_PATH_E2BIG,
    "Subdoc: Path too large"},
  { STATUS_SUBDOC_DOC_E2DEEP,
    "Subdoc: Document too deep"},
  { STATUS_SUBDOC_VALUE_CANTINSERT,
    "Subdoc: Cannot insert specified value"},
  { STATUS_SUBDOC_DOC_NOTJSON,
    "Subdoc: Existing document not JSON"},
  { STATUS_SUBDOC_NUM_ERANGE,
    "Subdoc: Existing number outside valid arithmetic range"},
  { STATUS_SUBDOC_DELTA_ERANGE,
    "Subdoc: Delta outside valid arithmetic range"},
  { STATUS_SUBDOC_PATH_EEXISTS,
    "Subdoc: Document path already exists"},
  { STATUS_SUBDOC_VALUE_ETOODEEP,
    "Subdoc: Inserting value would make document too deep"},
  { STATUS_SUBDOC_INVALID_COMBO,
    "Subdoc: Invalid combination for multi-path command"},
  { STATUS_SUBDOC_MULTI_PATH_FAILURE,
    "Subdoc: One or more paths in a multi-path command failed"},
  { STATUS_SUBDOC_SUCCESS_DELETED,
    "Subdoc: The operation completed successfully, but operated on a deleted document."},
  { STATUS_SUBDOC_XATTR_INVALID_FLAG_COMBO,
    "Subdoc: The combination of the subdoc flags for the xattrs doesn't make any sense."},
  { STATUS_SUBDOC_XATTR_INVALID_KEY_COMBO,
    "Subdoc: Only a single xattr key may be accessed at the same time."},
  { STATUS_SUBDOC_XATTR_UNKNOWN_MACRO,
    "Subdoc: The server has no knowledge of the requested macro."},
  { STATUS_SUBDOC_XATTR_UNKNOWN_VATTR,
    "Subdoc: The server has no knowledge of the requested virtual xattr."},
  { STATUS_SUBDOC_XATTR_CANT_MODIFY_VATTR,
    "Subdoc: Virtual xattrs can't be modified."},
  { STATUS_SUBDOC_MULTI_PATH_FAILURE_DELETED,
    "Subdoc: Specified key was found as a deleted document, but one or more path operations failed."},
  { STATUS_SUBDOC_INVALID_XATTR_ORDER,
    "Subdoc: According to the spec all xattr commands should come first, followed by the commands for the document body."},
  { STATUS_SUBDOC_XATTR_UNKNOWN_VATTR_MACRO,
    "Subdoc: The server does not know about this virtual macro."},
  { STATUS_SUBDOC_CAN_ONLY_REVIVE_DELETED_DOCUMENTS,
    "Subdoc: The document isn't dead (and we wanted to revive the document)."},
  { STATUS_SUBDOC_DELETED_DOCUMENT_CANT_HAVE_VALUE,
    "Subdoc: A deleted document can't have a user value."},
  { 0, NULL }
};

static value_string_ext status_vals_ext = VALUE_STRING_EXT_INIT(status_vals);

static const value_string client_opcode_vals[] = {
  { CLIENT_OPCODE_GET,                        "Get"                      },
  { CLIENT_OPCODE_SET,                        "Set"                      },
  { CLIENT_OPCODE_ADD,                        "Add"                      },
  { CLIENT_OPCODE_REPLACE,                    "Replace"                  },
  { CLIENT_OPCODE_DELETE,                     "Delete"                   },
  { CLIENT_OPCODE_INCREMENT,                  "Increment"                },
  { CLIENT_OPCODE_DECREMENT,                  "Decrement"                },
  { CLIENT_OPCODE_QUIT,                       "Quit"                     },
  { CLIENT_OPCODE_FLUSH,                      "Flush"                    },
  { CLIENT_OPCODE_GETQ,                       "Get Quietly"              },
  { CLIENT_OPCODE_NOOP,                       "NOOP"                     },
  { CLIENT_OPCODE_VERSION,                    "Version"                  },
  { CLIENT_OPCODE_GETK,                       "Get Key"                  },
  { CLIENT_OPCODE_GETKQ,                      "Get Key Quietly"          },
  { CLIENT_OPCODE_APPEND,                     "Append"                   },
  { CLIENT_OPCODE_PREPEND,                    "Prepend"                  },
  { CLIENT_OPCODE_STAT,                       "Statistics"               },
  { CLIENT_OPCODE_SETQ,                       "Set Quietly"              },
  { CLIENT_OPCODE_ADDQ,                       "Add Quietly"              },
  { CLIENT_OPCODE_REPLACEQ,                   "Replace Quietly"          },
  { CLIENT_OPCODE_DELETEQ,                    "Delete Quietly"           },
  { CLIENT_OPCODE_INCREMENTQ,                 "Increment Quietly"        },
  { CLIENT_OPCODE_DECREMENTQ,                 "Decrement Quietly"        },
  { CLIENT_OPCODE_QUITQ,                      "Quit Quietly"             },
  { CLIENT_OPCODE_FLUSHQ,                     "Flush Quietly"            },
  { CLIENT_OPCODE_APPENDQ,                    "Append Quietly"           },
  { CLIENT_OPCODE_PREPENDQ,                   "Prepend Quietly"          },
  { CLIENT_OPCODE_VERBOSITY,                  "Verbosity"                },
  { CLIENT_OPCODE_TOUCH,                      "Touch"                    },
  { CLIENT_OPCODE_GAT,                        "Get and Touch"            },
  { CLIENT_OPCODE_GATQ,                       "Gat and Touch Quietly"    },
  { CLIENT_OPCODE_HELLO,                      "Hello"                    },
  { CLIENT_OPCODE_SASL_LIST_MECHS,            "List SASL Mechanisms"     },
  { CLIENT_OPCODE_SASL_AUTH,                  "SASL Authenticate"        },
  { CLIENT_OPCODE_SASL_STEP,                  "SASL Step"                },
  { CLIENT_OPCODE_IOCTL_GET,                  "IOCTL Get"                },
  { CLIENT_OPCODE_IOCTL_SET,                  "IOCTL Set"                },
  { CLIENT_OPCODE_CONFIG_VALIDATE,            "Config Validate"          },
  { CLIENT_OPCODE_CONFIG_RELOAD,              "Config Reload"            },
  { CLIENT_OPCODE_AUDIT_PUT,                  "Audit Put"                },
  { CLIENT_OPCODE_AUDIT_CONFIG_RELOAD,        "Audit Config Reload"      },
  { CLIENT_OPCODE_SHUTDOWN,                   "Shutdown"                 },
  { CLIENT_OPCODE_RGET,                       "Range Get"                },
  { CLIENT_OPCODE_RSET,                       "Range Set"                },
  { CLIENT_OPCODE_RSETQ,                      "Range Set Quietly"        },
  { CLIENT_OPCODE_RAPPEND,                    "Range Append"             },
  { CLIENT_OPCODE_RAPPENDQ,                   "Range Append Quietly"     },
  { CLIENT_OPCODE_RPREPEND,                   "Range Prepend"            },
  { CLIENT_OPCODE_RPREPENDQ,                  "Range Prepend Quietly"    },
  { CLIENT_OPCODE_RDELETE,                    "Range Delete"             },
  { CLIENT_OPCODE_RDELETEQ,                   "Range Delete Quietly"     },
  { CLIENT_OPCODE_RINCR,                      "Range Increment"          },
  { CLIENT_OPCODE_RINCRQ,                     "Range Increment Quietly"  },
  { CLIENT_OPCODE_RDECR,                      "Range Decrement"          },
  { CLIENT_OPCODE_RDECRQ,                     "Range Decrement Quietly"  },
  { CLIENT_OPCODE_SET_VBUCKET,                "Set VBucket"              },
  { CLIENT_OPCODE_GET_VBUCKET,                "Get VBucket"              },
  { CLIENT_OPCODE_DEL_VBUCKET,                "Delete VBucket"           },
  { CLIENT_OPCODE_TAP_CONNECT,                "TAP Connect"              },
  { CLIENT_OPCODE_TAP_MUTATION,               "TAP Mutation"             },
  { CLIENT_OPCODE_TAP_DELETE,                 "TAP Delete"               },
  { CLIENT_OPCODE_TAP_FLUSH,                  "TAP Flush"                },
  { CLIENT_OPCODE_TAP_OPAQUE,                 "TAP Opaque"               },
  { CLIENT_OPCODE_TAP_VBUCKET_SET,            "TAP VBucket Set"          },
  { CLIENT_OPCODE_TAP_CHECKPOINT_START,       "TAP Checkpoint Start"     },
  { CLIENT_OPCODE_TAP_CHECKPOINT_END,         "TAP Checkpoint End"       },
  { CLIENT_OPCODE_GET_ALL_VB_SEQNOS,          "Get All VBucket Seqnos"   },
  { CLIENT_OPCODE_DCP_OPEN_CONNECTION,        "DCP Open Connection"      },
  { CLIENT_OPCODE_DCP_ADD_STREAM,             "DCP Add Stream"           },
  { CLIENT_OPCODE_DCP_CLOSE_STREAM,           "DCP Close Stream"         },
  { CLIENT_OPCODE_DCP_STREAM_REQUEST,         "DCP Stream Request"       },
  { CLIENT_OPCODE_DCP_FAILOVER_LOG_REQUEST,   "DCP Get Failover Log"     },
  { CLIENT_OPCODE_DCP_STREAM_END,             "DCP Stream End"           },
  { CLIENT_OPCODE_DCP_SNAPSHOT_MARKER,        "DCP Snapshot Marker"      },
  { CLIENT_OPCODE_DCP_MUTATION,               "DCP (Key) Mutation"       },
  { CLIENT_OPCODE_DCP_DELETION,               "DCP (Key) Deletion"       },
  { CLIENT_OPCODE_DCP_EXPIRATION,             "DCP (Key) Expiration"     },
  { CLIENT_OPCODE_DCP_FLUSH,                  "DCP Flush"                },
  { CLIENT_OPCODE_DCP_SET_VBUCKET_STATE,      "DCP Set VBucket State"    },
  { CLIENT_OPCODE_DCP_NOOP,                   "DCP NOOP"                 },
  { CLIENT_OPCODE_DCP_BUFFER_ACKNOWLEDGEMENT, "DCP Buffer Acknowledgement"},
  { CLIENT_OPCODE_DCP_CONTROL,                "DCP Control"              },
  { CLIENT_OPCODE_DCP_SYSTEM_EVENT,           "DCP System Event"         },
  { CLIENT_OPCODE_DCP_PREPARE,                "DCP Prepare"              },
  { CLIENT_OPCODE_DCP_SEQNO_ACK,              "DCP Seqno Acknowledgement"},
  { CLIENT_OPCODE_DCP_COMMIT,                 "DCP Commit"               },
  { CLIENT_OPCODE_DCP_ABORT,                  "DCP Abort"                },
  { CLIENT_OPCODE_DCP_SEQNO_ADVANCED,         "DCP Seqno Advanced"       },
  { CLIENT_OPCODE_DCP_OSO_SNAPSHOT,           "DCP Out of Sequence Order Snapshot"},
  { CLIENT_OPCODE_STOP_PERSISTENCE,           "Stop Persistence"         },
  { CLIENT_OPCODE_START_PERSISTENCE,          "Start Persistence"        },
  { CLIENT_OPCODE_SET_PARAM,                  "Set Parameter"            },
  { CLIENT_OPCODE_GET_REPLICA,                "Get Replica"              },
  { CLIENT_OPCODE_CREATE_BUCKET,              "Create Bucket"            },
  { CLIENT_OPCODE_DELETE_BUCKET,              "Delete Bucket"            },
  { CLIENT_OPCODE_LIST_BUCKETS,               "List Buckets"             },
  { CLIENT_OPCODE_EXPAND_BUCKET,              "Expand Bucket"            },
  { CLIENT_OPCODE_SELECT_BUCKET,              "Select Bucket"            },
  { CLIENT_OPCODE_START_REPLICATION,          "Start Replication"        },
  { CLIENT_OPCODE_OBSERVE_SEQNO,              "Observe Sequence Number"  },
  { CLIENT_OPCODE_OBSERVE,                    "Observe"                  },
  { CLIENT_OPCODE_EVICT_KEY,                  "Evict Key"                },
  { CLIENT_OPCODE_GET_LOCKED,                 "Get Locked"               },
  { CLIENT_OPCODE_UNLOCK_KEY,                 "Unlock Key"               },
  { CLIENT_OPCODE_SYNC,                       "Sync"                     },
  { CLIENT_OPCODE_LAST_CLOSED_CHECKPOINT,     "Last Closed Checkpoint"   },
  { CLIENT_OPCODE_RESTORE_FILE,               "Restore File"             },
  { CLIENT_OPCODE_RESTORE_ABORT,              "Restore Abort"            },
  { CLIENT_OPCODE_RESTORE_COMPLETE,           "Restore Complete"         },
  { CLIENT_OPCODE_ONLINE_UPDATE_START,        "Online Update Start"      },
  { CLIENT_OPCODE_ONLINE_UPDATE_COMPLETE,     "Online Update Complete"   },
  { CLIENT_OPCODE_ONLINE_UPDATE_REVERT,       "Online Update Revert"     },
  { CLIENT_OPCODE_DEREGISTER_TAP_CLIENT,      "Deregister TAP Client"    },
  { CLIENT_OPCODE_RESET_REPLICATION_CHAIN,    "Reset Replication Chain"  },
  { CLIENT_OPCODE_GET_META,                   "Get Meta"                 },
  { CLIENT_OPCODE_GETQ_META,                  "Get Meta Quietly"         },
  { CLIENT_OPCODE_SET_WITH_META,              "Set with Meta"            },
  { CLIENT_OPCODE_SETQ_WITH_META,             "Set with Meta Quietly"    },
  { CLIENT_OPCODE_ADD_WITH_META,              "Add with Meta"            },
  { CLIENT_OPCODE_ADDQ_WITH_META,             "Add with Meta Quietly"    },
  { CLIENT_OPCODE_SNAPSHOT_VB_STATES,         "Snapshot VBuckets States" },
  { CLIENT_OPCODE_VBUCKET_BATCH_COUNT,        "VBucket Batch Count"      },
  { CLIENT_OPCODE_DEL_WITH_META,              "Delete with Meta"         },
  { CLIENT_OPCODE_DELQ_WITH_META,             "Delete with Meta Quietly" },
  { CLIENT_OPCODE_CREATE_CHECKPOINT,          "Create Checkpoint"        },
  { CLIENT_OPCODE_NOTIFY_VBUCKET_UPDATE,      "Notify VBucket Update"    },
  { CLIENT_OPCODE_ENABLE_TRAFFIC,             "Enable Traffic"           },
  { CLIENT_OPCODE_DISABLE_TRAFFIC,            "Disable Traffic"          },
  { CLIENT_OPCODE_IFCONFIG,                   "Ifconfig"                 },
  { CLIENT_OPCODE_CHANGE_VB_FILTER,           "Change VBucket Filter"    },
  { CLIENT_OPCODE_CHECKPOINT_PERSISTENCE,     "Checkpoint Persistence"   },
  { CLIENT_OPCODE_RETURN_META,                "Return Meta"              },
  { CLIENT_OPCODE_COMPACT_DB,                 "Compact Database"         },
  { CLIENT_OPCODE_SET_CLUSTER_CONFIG,         "Set Cluster Config"       },
  { CLIENT_OPCODE_GET_CLUSTER_CONFIG,         "Get Cluster Config"       },
  { CLIENT_OPCODE_GET_RANDOM_KEY,             "Get Random Key"           },
  { CLIENT_OPCODE_SEQNO_PERSISTENCE,          "Seqno Persistence"        },
  { CLIENT_OPCODE_GET_KEYS,                   "Get Keys"                 },
  { CLIENT_OPCODE_COLLECTIONS_SET_MANIFEST,   "Set Collection's Manifest" },
  { CLIENT_OPCODE_COLLECTIONS_GET_MANIFEST,   "Get Collection's Manifest" },
  { CLIENT_OPCODE_COLLECTIONS_GET_ID,         "Get Collection ID"        },
  { CLIENT_OPCODE_COLLECTIONS_GET_SCOPE_ID,   "Get Scope ID"             },
  { CLIENT_OPCODE_SET_DRIFT_COUNTER_STATE,    "Set Drift Counter State"  },
  { CLIENT_OPCODE_GET_ADJUSTED_TIME,          "Get Adjusted Time"        },
  { CLIENT_OPCODE_SUBDOC_GET,                 "Subdoc Get"               },
  { CLIENT_OPCODE_SUBDOC_EXISTS,              "Subdoc Exists"            },
  { CLIENT_OPCODE_SUBDOC_DICT_ADD,            "Subdoc Dictionary Add"    },
  { CLIENT_OPCODE_SUBDOC_DICT_UPSERT,         "Subdoc Dictionary Upsert" },
  { CLIENT_OPCODE_SUBDOC_DELETE,              "Subdoc Delete"            },
  { CLIENT_OPCODE_SUBDOC_REPLACE,             "Subdoc Replace"           },
  { CLIENT_OPCODE_SUBDOC_ARRAY_PUSH_LAST,     "Subdoc Array Push Last"   },
  { CLIENT_OPCODE_SUBDOC_ARRAY_PUSH_FIRST,    "Subdoc Array Push First"  },
  { CLIENT_OPCODE_SUBDOC_ARRAY_INSERT,        "Subdoc Array Insert"      },
  { CLIENT_OPCODE_SUBDOC_ARRAY_ADD_UNIQUE,    "Subdoc Array Add Unique"  },
  { CLIENT_OPCODE_SUBDOC_COUNTER,             "Subdoc Counter"           },
  { CLIENT_OPCODE_SUBDOC_MULTI_LOOKUP,        "Subdoc Multipath Lookup"  },
  { CLIENT_OPCODE_SUBDOC_MULTI_MUTATION,      "Subdoc Multipath Mutation"},
  { CLIENT_OPCODE_SUBDOC_GET_COUNT,           "Subdoc Get Count"         },
  { CLIENT_OPCODE_SUBDOC_REPLACE_BODY_WITH_XATTR, "Subdoc Replace Body With Xattr"},
  { CLIENT_OPCODE_RANGE_SCAN_CREATE,          "RangeScan Create"         },
  { CLIENT_OPCODE_RANGE_SCAN_CONTINUE,        "RangeScan Continue"       },
  { CLIENT_OPCODE_RANGE_SCAN_CANCEL,          "RangeScan Cancel"         },
  { CLIENT_OPCODE_SCRUB,                      "Scrub"                    },
  { CLIENT_OPCODE_ISASL_REFRESH,              "isasl Refresh"            },
  { CLIENT_OPCODE_SSL_CERTS_REFRESH,          "SSL Certificates Refresh" },
  { CLIENT_OPCODE_GET_CMD_TIMER,              "Internal Timer Control"   },
  { CLIENT_OPCODE_SET_CTRL_TOKEN,             "Set Control Token"        },
  { CLIENT_OPCODE_GET_CTRL_TOKEN,             "Get Control Token"        },
  { CLIENT_OPCODE_UPDATE_EXTERNAL_USER_PERMISSIONS, "Update External User Permissions"},
  { CLIENT_OPCODE_RBAC_REFRESH,               "RBAC Refresh"             },
  { CLIENT_OPCODE_AUTH_PROVIDER,              "Auth Provider"            },
  { CLIENT_OPCODE_DROP_PRIVILEGE,             "Drop Privilege"           },
  { CLIENT_OPCODE_ADJUST_TIMEOFDAY,           "Adjust Timeofday"         },
  { CLIENT_OPCODE_EWOULDBLOCK_CTL,            "EWOULDBLOCK Control"      },
  { CLIENT_OPCODE_GET_ERROR_MAP,              "Get Error Map"            },

  /* Internally defined values not valid here */
  { 0, NULL }
};

static value_string_ext client_opcode_vals_ext = VALUE_STRING_EXT_INIT(client_opcode_vals);

typedef enum {
    SERVER_OPCODE_CLUSTERMAP_CHANGE_NOTIFICATION = 0x01,
    SERVER_OPCODE_AUTHENTICATE = 0x02,
    SERVER_OPCODE_ACTIVE_EXTERNAL_USERS = 0x03,
    SERVER_OPCODE_GET_AUTHORIZATION = 0x04
} server_opcode_t;

static const value_string server_opcode_vals[] = {
        { SERVER_OPCODE_CLUSTERMAP_CHANGE_NOTIFICATION, "ClustermapChangeNotification"},
        { SERVER_OPCODE_AUTHENTICATE, "Authenticate"},
        { SERVER_OPCODE_ACTIVE_EXTERNAL_USERS, "ActiveExternalUsers"},
        { SERVER_OPCODE_GET_AUTHORIZATION, "GetAuthorization"},
        {0, NULL}
};
static value_string_ext server_opcode_vals_ext = VALUE_STRING_EXT_INIT(server_opcode_vals);

static const value_string dcp_connection_type_vals[] = {
  {0, "Consumer"},
  {1, "Producer"},
  {2, "Notifier"},
  {0, NULL}
};

static const value_string vbucket_states_vals[] = {
  {1, "Active"},
  {2, "Replica"},
  {3, "Pending"},
  {4, "Dead"},
  {0, NULL}
};

static int * const datatype_vals[] = {
  &hf_datatype_json,
  &hf_datatype_snappy,
  &hf_datatype_xattr,
  NULL
};

static int * const subdoc_flags[] = {
  &hf_subdoc_flags_mkdirp,
  &hf_subdoc_flags_xattrpath,
  &hf_subdoc_flags_expandmacros,
  &hf_subdoc_flags_reserved,
  NULL
};

static int * const subdoc_doc_flags[] = {
  &hf_subdoc_doc_flags_mkdoc,
  &hf_subdoc_doc_flags_add,
  &hf_subdoc_doc_flags_accessdeleted,
  &hf_subdoc_doc_flags_createasdeleted,
  &hf_subdoc_doc_flags_revivedocument,
  &hf_subdoc_doc_flags_replicaread,
  &hf_subdoc_doc_flags_reserved,
  NULL
};

static int * const set_with_meta_extra_flags[] = {
        &hf_force_meta,
        &hf_force_accept,
        &hf_regenerate_cas,
        &hf_skip_conflict,
        NULL
};

static int * const del_with_meta_extra_flags[] = {
        &hf_force_meta,
        &hf_force_accept,
        &hf_regenerate_cas,
        &hf_skip_conflict,
        &hf_is_expiration,
        NULL
};

static const value_string feature_vals[] = {
  {0x01, "Datatype (deprecated)"},
  {0x02, "TLS"},
  {0x03, "TCP Nodelay"},
  {0x04, "Mutation Seqno"},
  {0x05, "TCP Delay"},
  {0x06, "XATTR"},
  {0x07, "Error Map"},
  {0x08, "Select Bucket"},
  {0x09, "Collections (deprecated)"},
  {0x0a, "Snappy"},
  {0x0b, "JSON"},
  {0x0c, "Duplex"},
  {0x0d, "Clustermap Change Notification"},
  {0x0e, "Unordered Execution"},
  {0x0f, "Tracing"},
  {0x10, "AltRequestSupport"},
  {0x11, "SyncReplication"},
  {0x12, "Collections"},
  {0x13, "OpenTracing"},
  {0x14, "PreserveTtl"},
  {0x15, "VAttr"},
  {0x16, "Point in Time Recovery"},
  {0x17, "SubdocCreateAsDeleted"},
  {0x18, "SubdocDocumentMacroSupport"},
  {0x19, "SubdocReplaceBodyWithXattr"},
  {0x1a, "ReportUnitUsage"},
  {0x1b, "NonBlockingThrottlingMode"},
  {0, NULL}
};

static const value_string dcp_system_event_id_vals [] = {
    {0, "CreateCollection"},
    {1, "DropCollection"},
    {2, "FlushCollection"},
    {3, "CreateScope"},
    {4, "DropScope"},
    {0, NULL}
};

static int * const snapshot_marker_flags [] = {
    &hf_extras_flags_dcp_snapshot_marker_memory,
    &hf_extras_flags_dcp_snapshot_marker_disk,
    &hf_extras_flags_dcp_snapshot_marker_chk,
    &hf_extras_flags_dcp_snapshot_marker_ack,
    &hf_extras_flags_dcp_snapshot_marker_history,
    &hf_extras_flags_dcp_snapshot_marker_may_contain_dups,
    NULL
};

static dissector_handle_t couchbase_handle;
static dissector_handle_t json_handle;

/* desegmentation of COUCHBASE payload */
static gboolean couchbase_desegment_body = TRUE;
static guint couchbase_ssl_port = 11207;
static guint couchbase_ssl_port_pref = 11207;

/** Read out the magic byte (located at offset 0 in the header) */
static guint8 get_magic(tvbuff_t *tvb) {
  return tvb_get_guint8(tvb, 0);
}

/** Read out the opcode (located at offset 1 in the header) */
static guint8 get_opcode(tvbuff_t *tvb) {
  return tvb_get_guint8(tvb, 1);
}

/** Read out the status code from the header (only "valid" for response packets) */
static guint16 get_status(tvbuff_t *tvb) {
  return tvb_get_ntohs(tvb, 6);
}

/** Read out flex size (using the upper bits of the key length when using flex encoding) */
static guint8 get_flex_framing_extras_length(tvbuff_t *tvb) {
  if (is_flex_encoded(get_magic(tvb))) {
    return tvb_get_guint8(tvb, 2);
  }
  return 0;
}

/** Read out the size of the extras section (located at offset 4) */
static guint8 get_extras_length(tvbuff_t *tvb) {
  return tvb_get_guint8(tvb, 4);
}

/** Read out the datatype section (located at offset 5) */
static guint8 get_datatype(tvbuff_t *tvb) {
  return tvb_get_guint8(tvb, 5);
}

/** Read out the length of the key (1 or 2 bytes depending on the encoding) */
static guint16 get_key_length(tvbuff_t *tvb) {
  if (is_flex_encoded(get_magic(tvb))) {
    return tvb_get_guint8(tvb, 3);
  }
  return tvb_get_ntohs(tvb, 2);
}

/** Read out the size for the rest of the frame data */
static guint32 get_body_length(tvbuff_t *tvb) {
  return tvb_get_ntohl(tvb, 8);
}

/* Returns true if the specified opcode's response value is JSON. */
static gboolean
has_json_value(gboolean is_request, guint8 opcode)
{
  if (is_request) {
    switch (opcode) {
    case CLIENT_OPCODE_AUDIT_PUT:
    case CLIENT_OPCODE_RANGE_SCAN_CREATE:
      return TRUE;

    default:
      return FALSE;
    }
  } else {
    switch (opcode) {
    case CLIENT_OPCODE_GET_CLUSTER_CONFIG:
    case CLIENT_OPCODE_SUBDOC_GET:
    case CLIENT_OPCODE_COLLECTIONS_GET_MANIFEST:
    case CLIENT_OPCODE_COLLECTIONS_SET_MANIFEST:
      return TRUE;

    default:
      return FALSE;
    }
  }
}

static void dissect_dcp_xattrs(tvbuff_t *tvb, proto_tree *tree,
                               guint32 value_len, gint offset,
                               packet_info *pinfo) {
  guint32 xattr_size, pair_len;
  gint mark;
  proto_tree *xattr_tree, *pair_tree;
  proto_item *ti;

  proto_tree_add_item_ret_uint(tree, hf_xattr_length, tvb, offset, 4, ENC_BIG_ENDIAN, &xattr_size);
  value_len = value_len - (xattr_size + 4);
  offset += 4;

  ti = proto_tree_add_item(tree, hf_xattrs, tvb, offset, xattr_size, ENC_NA);
  xattr_tree = proto_item_add_subtree(ti, ett_xattrs);

  while (xattr_size > 0) {

    ti = proto_tree_add_item_ret_uint(xattr_tree, hf_xattr_pair_length, tvb, offset, 4, ENC_BIG_ENDIAN, &pair_len);
    pair_tree = proto_item_add_subtree(ti, ett_xattr_pair);
    offset += 4;
    xattr_size -= 4;

    mark = tvb_find_guint8(tvb, offset, pair_len, 0x00);
    if (mark == -1) {
      expert_add_info_format(pinfo, ti, &ef_separator_not_found, "Null byte not found");
      return;
    }

    ti = proto_tree_add_item(pair_tree, hf_xattr_key, tvb, offset, mark - offset, ENC_ASCII | ENC_NA);
    xattr_size -= (mark - offset) + 1;
    pair_len -= (mark - offset) + 1;
    offset = mark + 1;

    mark = tvb_find_guint8(tvb, offset, pair_len, 0x00);
    if (mark == -1) {
      expert_add_info_format(pinfo, ti, &ef_separator_not_found, "Null byte not found");
      return;
    }

    proto_tree_add_item(pair_tree, hf_xattr_value, tvb, offset, mark - offset, ENC_ASCII | ENC_NA);
    xattr_size -= (mark - offset) + 1;
    offset = mark + 1;
  }

  //The regular value
  proto_tree_add_item(tree, hf_value, tvb, offset, value_len, ENC_ASCII | ENC_NA);
}

/* Dissects the required extras for subdoc single-path packets */
static void
dissect_subdoc_spath_required_extras(tvbuff_t *tvb, proto_tree *extras_tree,
                                     guint8 extlen, gboolean request, gint* offset,
                                     guint16 *path_len, gboolean *illegal)
{
  if (request) {
    if (extlen >= 3) {
      *path_len = tvb_get_ntohs(tvb, *offset);
      proto_tree_add_item(extras_tree, hf_extras_pathlen, tvb, *offset, 2,
                          ENC_BIG_ENDIAN);
      *offset += 2;

      proto_tree_add_bitmask(extras_tree, tvb, *offset, hf_subdoc_flags,
                             ett_extras_flags, subdoc_flags, ENC_BIG_ENDIAN);
      *offset += 1;
    } else {
      /* Must always have at least 3 bytes of extras */
      *illegal = TRUE;
    }
  }
}

static void dissect_server_request_extras(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree, gint offset, guint8 extlen, guint8 opcode) {
  if (extlen == 0) {
    switch (opcode) {
      case SERVER_OPCODE_CLUSTERMAP_CHANGE_NOTIFICATION:
        proto_tree_add_expert_format(tree, pinfo, &ef_warn_must_have_extras, tvb, offset, 0,
                                     "ClustermapChangeNotification request must have extras");
        return;

      case SERVER_OPCODE_GET_AUTHORIZATION:
      case SERVER_OPCODE_AUTHENTICATE:
      case SERVER_OPCODE_ACTIVE_EXTERNAL_USERS:
        // Success! none of these commands use extras

      default:
        // Probably ok as we don't know about the opcode
        return;
    }
  }


  proto_item *extras_item = proto_tree_add_item(tree, hf_extras, tvb, offset, extlen, ENC_NA);
  proto_tree *extras_tree = proto_item_add_subtree(extras_item, ett_extras);

  if (opcode == SERVER_OPCODE_CLUSTERMAP_CHANGE_NOTIFICATION) {
    // Expected 16 bytes of extras!
    if (extlen < 16) {
      proto_tree_add_expert_format(extras_tree, pinfo,
                                   &ef_warn_illegal_extras_length, tvb,
                                   offset, extlen,
                                   "ClustermapChangeNotification should have 16 bytes of extras");
      return;
    }

    proto_tree_add_item(extras_tree, hf_server_extras_cccp_epoch, tvb, offset, 8, ENC_BIG_ENDIAN);
    offset += 8;
    proto_tree_add_item(extras_tree, hf_server_extras_cccp_revno, tvb, offset, 8, ENC_BIG_ENDIAN);

    if (extlen > 16) {
      proto_tree_add_expert_format(extras_tree, pinfo,
                                   &ef_warn_illegal_extras_length, tvb,
                                   offset + 16, extlen - 16,
                                   "Unexpected amount of extras");
    }
    return;
  }

  // we don't know how to decode this!
  proto_tree_add_item(extras_tree, hf_extras_unknown, tvb, offset, extlen, ENC_NA);
}

static void
dissect_server_response_extras(tvbuff_t *tvb, packet_info *pinfo,
                               proto_tree *tree, gint offset, guint8 extlen,
                               guint8 opcode _U_) {
  if (extlen == 0) {
    // Success! none of the known commands use extras
    return;
  }

  proto_item *extras_item = proto_tree_add_item(tree, hf_extras, tvb, offset,
                                                extlen, ENC_NA);
  proto_tree *extras_tree = proto_item_add_subtree(extras_item, ett_extras);
  proto_tree_add_expert_format(extras_tree, pinfo,
                               &ef_warn_illegal_extras_length, tvb,
                               offset, extlen,
                               "Unexpected amount of extras");
}

static void
dissect_client_extras(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
                      gint offset, guint8 extlen, guint8 opcode, gboolean request,
                      guint16 *path_len)
{
  proto_tree *extras_tree = NULL;
  proto_item *extras_item = NULL;
  gint        save_offset = offset, ii;
  guint       bpos;
  gboolean    illegal = FALSE;  /* Set when extras shall not be present */
  gboolean    missing = FALSE;  /* Set when extras is missing */
  gboolean    first_flag;
  guint32     flags;
  proto_item *tf;
  const gchar   *tap_connect_flags[] = {
    "BACKFILL", "DUMP", "LIST_VBUCKETS", "TAKEOVER_VBUCKETS",
    "SUPPORT_ACK", "REQUEST_KEYS_ONLY", "CHECKPOINT", "REGISTERED_CLIENT"
  };

  *path_len = 0;

  if (extlen) {
    extras_item = proto_tree_add_item(tree, hf_extras, tvb, offset, extlen, ENC_NA);
    extras_tree = proto_item_add_subtree(extras_item, ett_extras);
  }

  switch (opcode) {

  case CLIENT_OPCODE_GET:
  case CLIENT_OPCODE_GETQ:
  case CLIENT_OPCODE_GETK:
  case CLIENT_OPCODE_GETKQ:
    if (extlen) {
      if (request) {
        /* Request shall not have extras */
        illegal = TRUE;
      } else {
        proto_tree_add_item(extras_tree, hf_extras_flags, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
      }
    } else if (!request) {
      /* Response must have extras */
      missing = TRUE;
    }
    break;

  case CLIENT_OPCODE_SET:
  case CLIENT_OPCODE_SETQ:
  case CLIENT_OPCODE_ADD:
  case CLIENT_OPCODE_ADDQ:
  case CLIENT_OPCODE_REPLACE:
  case CLIENT_OPCODE_REPLACEQ:
    if (extlen) {
      if (request) {
        proto_tree_add_item(extras_tree, hf_extras_flags, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;

        proto_tree_add_item(extras_tree, hf_extras_expiration, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
      } else {
        proto_tree_add_item(extras_tree, hf_extras_vbucket_uuid, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;

        proto_tree_add_item(extras_tree, hf_extras_mutation_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
      }
    } else if (request) {
      /* Request must have extras */
      missing = TRUE;
    }
    break;

  case CLIENT_OPCODE_INCREMENT:
  case CLIENT_OPCODE_INCREMENTQ:
  case CLIENT_OPCODE_DECREMENT:
  case CLIENT_OPCODE_DECREMENTQ:
    if (extlen) {
      if (request) {
        proto_tree_add_item(extras_tree, hf_extras_delta, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;

        proto_tree_add_item(extras_tree, hf_extras_initial, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;

        proto_tree_add_item(extras_tree, hf_extras_expiration, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
      } else {
        proto_tree_add_item(extras_tree, hf_extras_vbucket_uuid, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;

        proto_tree_add_item(extras_tree, hf_extras_mutation_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
      }
    } else if (request) {
      /* Request must have extras */
      missing = TRUE;
    }
    break;

  case CLIENT_OPCODE_FLUSH:
  case CLIENT_OPCODE_FLUSHQ:
    if (extlen) {
      proto_tree_add_item(extras_tree, hf_extras_expiration, tvb, offset, 4, ENC_BIG_ENDIAN);
      offset += 4;
    }
    break;

  case CLIENT_OPCODE_DELETE:
  case CLIENT_OPCODE_DELETEQ:
  case CLIENT_OPCODE_APPEND:
  case CLIENT_OPCODE_APPENDQ:
  case CLIENT_OPCODE_PREPEND:
  case CLIENT_OPCODE_PREPENDQ:
    if (extlen) {
      if (request) {
        /* Must not have extras */
        illegal = TRUE;
      } else {
        proto_tree_add_item(extras_tree, hf_extras_vbucket_uuid, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;

        proto_tree_add_item(extras_tree, hf_extras_mutation_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
      }
    }
    break;

  case CLIENT_OPCODE_QUIT:
  case CLIENT_OPCODE_QUITQ:
  case CLIENT_OPCODE_VERSION:
  case CLIENT_OPCODE_STAT:
  case CLIENT_OPCODE_OBSERVE:
  case CLIENT_OPCODE_OBSERVE_SEQNO:
    /* Must not have extras */
    if (extlen) {
      illegal = TRUE;
    }
    break;

  case CLIENT_OPCODE_GET_ALL_VB_SEQNOS:
    if (extlen) {
      if (request) {
        /* May have extras */
        proto_tree_add_item(extras_tree, hf_vbucket_states_state, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
      } else {
        /* Must not have extras */
        illegal = TRUE;
      }
    }
    break;

  case CLIENT_OPCODE_TAP_CONNECT:
    {
    static int * const extra_flags[] = {
        &hf_extras_flags_backfill,
        &hf_extras_flags_dump,
        &hf_extras_flags_list_vbuckets,
        &hf_extras_flags_takeover_vbuckets,
        &hf_extras_flags_support_ack,
        &hf_extras_flags_request_keys_only,
        &hf_extras_flags_checkpoint,
        NULL
    };

    /* TODO: extra_flags fields are 16-bits wide, whereas flags is 4 bytes? */
    tf = proto_tree_add_bitmask(extras_tree, tvb, offset, hf_extras_flags, ett_extras_flags, extra_flags, ENC_BIG_ENDIAN);

    flags = tvb_get_ntohl(tvb, offset);
    first_flag = TRUE;
    for (ii = 0; ii < 8; ii++) {
      bpos = 1 << ii;
      if (flags & bpos) {
        if (first_flag) {
          proto_item_append_text(tf, " (");
        }
        proto_item_append_text(tf, "%s%s",
                                  first_flag ? "" : ", ",
                                  tap_connect_flags[ii]);
        first_flag = FALSE;
      }
    }
    if (first_flag == TRUE) {
      proto_item_append_text(tf, " <None>");
    } else {
      proto_item_append_text(tf, ")");
    }

    offset += 4;
    }
    break;

  case CLIENT_OPCODE_TAP_MUTATION:
  case CLIENT_OPCODE_TAP_DELETE:
  case CLIENT_OPCODE_TAP_FLUSH:
  case CLIENT_OPCODE_TAP_OPAQUE:
  case CLIENT_OPCODE_TAP_VBUCKET_SET:
  case CLIENT_OPCODE_TAP_CHECKPOINT_START:
  case CLIENT_OPCODE_TAP_CHECKPOINT_END:
    break;

  case CLIENT_OPCODE_DCP_OPEN_CONNECTION:
    if (extlen) {
      if (request) {
        static int * const extra_flags[] = {
          &hf_extras_flags_dcp_connection_type,
          &hf_extras_flags_dcp_include_xattrs,
          &hf_extras_flags_dcp_no_value,
          &hf_extras_flags_dcp_collections,
          &hf_extras_flags_dcp_include_delete_times,
          NULL
        };

        proto_tree_add_item(extras_tree, hf_extras_seqno, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
        proto_tree_add_bitmask(extras_tree, tvb, offset, hf_extras_flags, ett_extras_flags, extra_flags, ENC_BIG_ENDIAN);
        offset += 4;
      } else {
        /* Response must not have extras (response is in Value) */
        illegal = TRUE;
      }
    } else if (request) {
      /* Request must have extras */
      missing = TRUE;
    }
    break;

  case CLIENT_OPCODE_DCP_ADD_STREAM:
    if (extlen) {
      if (request) {
        static int * const extra_flags[] = {
          &hf_extras_flags_dcp_add_stream_takeover,
          &hf_extras_flags_dcp_add_stream_diskonly,
          &hf_extras_flags_dcp_add_stream_latest,
          NULL
        };

        proto_tree_add_bitmask(extras_tree, tvb, offset, hf_extras_flags, ett_extras_flags, extra_flags, ENC_BIG_ENDIAN);
        offset += 4;
      } else {
        proto_tree_add_item(extras_tree, hf_extras_opaque, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
      }
    } else {
      missing = TRUE;
    }
    break;

  case CLIENT_OPCODE_DCP_STREAM_REQUEST:
    if (extlen) {
      if (request) {
        /* No extra_flags and proto_tree_add_bitmask don't work with empty flags See Bug:17890
        static int * const extra_flags[] = {
          NULL
        };

        proto_tree_add_bitmask(extras_tree, tvb, offset, hf_extras_flags, ett_extras_flags, extra_flags, ENC_BIG_ENDIAN);
        */
        proto_tree_add_item(extras_tree, hf_extras_flags, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
        proto_tree_add_item(extras_tree, hf_extras_reserved, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
        proto_tree_add_item(extras_tree, hf_extras_start_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        proto_tree_add_item(extras_tree, hf_extras_end_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        proto_tree_add_item(extras_tree, hf_extras_vbucket_uuid, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        proto_tree_add_item(extras_tree, hf_extras_snap_start_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        proto_tree_add_item(extras_tree, hf_extras_snap_end_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
      }
    } else if (request) {
      /* Request must have extras */
      missing = TRUE;
    }
    break;

  case CLIENT_OPCODE_DCP_SNAPSHOT_MARKER:
    if (extlen) {
      if (request) {
        // Two formats exist and the extlen allows us to know which is which
        if (extlen == 1) {
          proto_tree_add_item(extras_tree, hf_extras_marker_version, tvb, offset, 1, ENC_BIG_ENDIAN);
          offset += 1;
        } else if (extlen == 20){
          proto_tree_add_item(extras_tree, hf_extras_start_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
          offset += 8;
          proto_tree_add_item(extras_tree, hf_extras_end_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
          offset += 8;
          proto_tree_add_bitmask(extras_tree, tvb, offset, hf_extras_flags, ett_extras_flags, snapshot_marker_flags, ENC_BIG_ENDIAN);
          offset += 4;
        } else {
          illegal = TRUE;
        }
      } else {
        illegal = TRUE;
      }
    } else if (request) {
      /* Request must have extras */
      missing = TRUE;
    }
    break;

  case CLIENT_OPCODE_DCP_MUTATION:
    if (extlen) {
      if (request) {
        /* No extra_flags and proto_tree_add_bitmask don't work with empty flags See Bug:17890
        static int * const extra_flags[] = {
          NULL
        };
        */

        proto_tree_add_item(extras_tree, hf_extras_by_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        proto_tree_add_item(extras_tree, hf_extras_rev_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        /*
        proto_tree_add_bitmask(extras_tree, tvb, offset, hf_extras_flags, ett_extras_flags, extra_flags, ENC_BIG_ENDIAN);
        */
        proto_tree_add_item(extras_tree, hf_extras_flags, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
        proto_tree_add_item(extras_tree, hf_extras_expiration, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
        proto_tree_add_item(extras_tree, hf_extras_lock_time, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
        proto_tree_add_item(extras_tree, hf_extras_nmeta, tvb, offset, 2, ENC_BIG_ENDIAN);
        offset += 2;
        proto_tree_add_item(extras_tree, hf_extras_nru, tvb, offset, 1, ENC_BIG_ENDIAN);
        offset += 1;
      } else {
        illegal = TRUE;
      }
    } else if (request) {
      /* Request must have extras */
      missing = TRUE;
    }
    break;

  case CLIENT_OPCODE_DCP_DELETION:
    if (request) {
      if (extlen == 18 || extlen == 21) {
        proto_tree_add_item(extras_tree, hf_extras_by_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        proto_tree_add_item(extras_tree, hf_extras_rev_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;

        // Is this a delete with delete_time (21 bytes) or not (18 bytes)?
        if (extlen == 18) {
          proto_tree_add_item(extras_tree, hf_extras_nmeta, tvb, offset, 2, ENC_BIG_ENDIAN);
          offset += 2;
        } else if (extlen == 21) {
          proto_tree_add_item(extras_tree, hf_extras_delete_time, tvb, offset, 4, ENC_BIG_ENDIAN);
          offset += 4;
          proto_tree_add_item(extras_tree, hf_extras_delete_unused, tvb, offset, 1, ENC_BIG_ENDIAN);
          offset += 1;
        }
      } else if (extlen == 0) {
        missing = TRUE; // request with no extras
      }
    } else if (extlen) {
        illegal = TRUE; // response with extras
    }
    break;
  case CLIENT_OPCODE_DCP_EXPIRATION:
    if (extlen) {
        if (request) {
            proto_tree_add_item(extras_tree, hf_extras_by_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
            offset += 8;
            proto_tree_add_item(extras_tree, hf_extras_rev_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
            offset += 8;
            if (extlen == 20) {
                proto_tree_add_item(extras_tree, hf_extras_delete_time, tvb, offset, 4, ENC_BIG_ENDIAN);
                offset += 4;
            } else {
                // Handle legacy expiration packet (despite its lack of use)
                proto_tree_add_item(extras_tree, hf_extras_nmeta, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;
            }
        } else {
            illegal = TRUE;
        }
    } else if (request) {
        /* Request must have extras */
        missing = TRUE;
    }
    break;
  case CLIENT_OPCODE_DCP_FLUSH:
    if (extlen) {
      if (request) {
        proto_tree_add_item(extras_tree, hf_extras_by_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        proto_tree_add_item(extras_tree, hf_extras_rev_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        proto_tree_add_item(extras_tree, hf_extras_nmeta, tvb, offset, 2, ENC_BIG_ENDIAN);
        offset += 2;
      } else {
        illegal = TRUE;
      }
    } else if (request) {
      /* Request must have extras */
      missing = TRUE;
    }
    break;

  case CLIENT_OPCODE_DCP_BUFFER_ACKNOWLEDGEMENT:
    if (extlen) {
      if (request) {
        proto_tree_add_item(extras_tree, hf_extras_bytes_to_ack, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
      } else {
        illegal = TRUE;
      }
    } else if (request) {
      /* Request must have extras */
      missing = TRUE;
    }
    break;
  case CLIENT_OPCODE_DCP_SYSTEM_EVENT: {
    if (request && extlen == 13) {
      proto_tree_add_item(extras_tree, hf_extras_by_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
      offset += 8;
      proto_tree_add_item(extras_tree, hf_extras_system_event_id, tvb, offset, 4, ENC_BIG_ENDIAN);
      offset += 4;
      proto_tree_add_item(extras_tree, hf_extras_system_event_version, tvb, offset, 1, ENC_BIG_ENDIAN);
      offset += 1;
    }
    break;
  }
  case CLIENT_OPCODE_DCP_PREPARE: {
    if (extlen) {
      if (request) {
        /* No extra_flags and proto_tree_add_bitmask don't work with empty flags See Bug:17890
        static int * const extra_flags[] = {
          NULL
        };
        */

        proto_tree_add_item(extras_tree, hf_extras_by_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        proto_tree_add_item(extras_tree, hf_extras_rev_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        /*
        proto_tree_add_bitmask(extras_tree, tvb, offset, hf_extras_flags, ett_extras_flags, extra_flags, ENC_BIG_ENDIAN);
        */
        proto_tree_add_item(extras_tree, hf_extras_flags, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
        proto_tree_add_item(extras_tree, hf_extras_expiration, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
        proto_tree_add_item(extras_tree, hf_extras_lock_time, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
        proto_tree_add_item(extras_tree, hf_extras_nru, tvb, offset, 1, ENC_BIG_ENDIAN);
        offset += 1;
        proto_tree_add_item(extras_tree, hf_extras_deleted, tvb, offset, 1, ENC_BIG_ENDIAN);
        offset += 1;
        proto_tree_add_item(extras_tree, hf_flex_frame_durability_req, tvb, offset, 1, ENC_BIG_ENDIAN);
        offset += 1;
      } else {
        illegal = TRUE;
      }
    } else if (request) {
      /* Request must have extras */
      missing = TRUE;
    }
    break;
  }
  case CLIENT_OPCODE_DCP_SEQNO_ACK: {
    if (extlen) {
      if (request) {
        proto_tree_add_item(extras_tree, hf_extras_by_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
      } else {
        illegal = TRUE;
      }
    } else if (request) {
      /* Request must have extras */
      missing = TRUE;
    }
    break;
  }
  case CLIENT_OPCODE_DCP_COMMIT: {
    if (extlen) {
      if (request) {
        proto_tree_add_item(extras_tree, hf_extras_prepared_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        proto_tree_add_item(extras_tree, hf_extras_by_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
      } else {
        illegal = TRUE;
      }
    } else if (request) {
      /* Request must have extras */
      missing = TRUE;
    }
    break;
  }
  case CLIENT_OPCODE_DCP_ABORT: {
    if (extlen) {
      if (request) {
        proto_tree_add_item(extras_tree, hf_extras_prepared_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        proto_tree_add_item(extras_tree, hf_extras_abort_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
      } else {
        illegal = TRUE;
      }
    } else if (request) {
      /* Request must have extras */
      missing = TRUE;
    }
    break;
  }
  case CLIENT_OPCODE_DCP_SEQNO_ADVANCED: {
    if (extlen) {
      if (request) {
        proto_tree_add_item(extras_tree, hf_extras_by_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
      } else {
        illegal = TRUE;
      }
    } else if (request) {
      /* Request must have extras */
      missing = TRUE;
    }
    break;
  }
  case CLIENT_OPCODE_DCP_OSO_SNAPSHOT: {
    if (extlen) {
      if (request) {
        static int * const extra_flags[] = {
          &hf_extras_flags_dcp_oso_snapshot_begin,
          &hf_extras_flags_dcp_oso_snapshot_end,
          NULL
        };
        proto_tree_add_bitmask(extras_tree,
                               tvb,
                               offset,
                               hf_extras_dcp_oso_snapshot_flags,
                               ett_extras_flags,
                               extra_flags,
                               ENC_BIG_ENDIAN);
        offset += 4;
      } else {
        illegal = TRUE;
      }
    } else if (request) {
      /* Request must have extras */
      missing = TRUE;
    }
    break;
  }
  case CLIENT_OPCODE_SUBDOC_GET:
  case CLIENT_OPCODE_SUBDOC_EXISTS:
    dissect_subdoc_spath_required_extras(tvb, extras_tree, extlen, request,
                                         &offset, path_len, &illegal);
    if (extlen == 4) {
      proto_tree_add_bitmask(extras_tree, tvb, offset, hf_subdoc_doc_flags,
                             ett_extras_flags, subdoc_doc_flags, ENC_BIG_ENDIAN);
      offset += 1;
    }
    break;

  case CLIENT_OPCODE_SUBDOC_DICT_ADD:
  case CLIENT_OPCODE_SUBDOC_DICT_UPSERT:
  case CLIENT_OPCODE_SUBDOC_DELETE:
  case CLIENT_OPCODE_SUBDOC_REPLACE:
  case CLIENT_OPCODE_SUBDOC_ARRAY_PUSH_LAST:
  case CLIENT_OPCODE_SUBDOC_ARRAY_PUSH_FIRST:
  case CLIENT_OPCODE_SUBDOC_ARRAY_INSERT:
  case CLIENT_OPCODE_SUBDOC_ARRAY_ADD_UNIQUE:
  case CLIENT_OPCODE_SUBDOC_COUNTER:
    dissect_subdoc_spath_required_extras(tvb, extras_tree, extlen, request,
                                         &offset, path_len, &illegal);
    if (request) {
      /* optional expiry only permitted for mutation requests,
         if and only if (extlen == 7 || extlen == 8) */
      if (extlen == 7 || extlen == 8) {
        proto_tree_add_item(extras_tree, hf_extras_expiration, tvb, offset,
                            4, ENC_BIG_ENDIAN);
        offset += 4;
      }
      /* optional doc flags only permitted if and only if
         (extlen == 4 || extlen == 8) */
      if (extlen == 4 || extlen == 8) {
        proto_tree_add_bitmask(extras_tree, tvb, offset, hf_subdoc_doc_flags,
                               ett_extras_flags, subdoc_doc_flags,
                               ENC_BIG_ENDIAN);
        offset += 1;
      }
      if (extlen != 3 && extlen != 7 && extlen != 4 && extlen != 8) {
        illegal = TRUE;
      }
    }
    break;

  case CLIENT_OPCODE_SUBDOC_MULTI_LOOKUP:
    if (request) {
      if (extlen == 1) {
        proto_tree_add_bitmask(extras_tree, tvb, offset, hf_subdoc_doc_flags,
                               ett_extras_flags, subdoc_doc_flags,
                               ENC_BIG_ENDIAN);
        offset += 1;
      } else {
        illegal = TRUE;
      }
    }
    break;

  case CLIENT_OPCODE_SUBDOC_MULTI_MUTATION:
    if (request) {
      if (extlen == 4 || extlen == 5) {
        proto_tree_add_item(extras_tree, hf_extras_expiration, tvb, offset, 4,
                            ENC_BIG_ENDIAN);
        offset += 4;
      }
      if (extlen == 1 || extlen == 5) {
        proto_tree_add_bitmask(extras_tree, tvb, offset, hf_subdoc_doc_flags,
                               ett_extras_flags, subdoc_doc_flags, ENC_BIG_ENDIAN);
        offset += 1;
      }
      if (extlen != 1 && extlen != 4 && extlen != 5) {
        illegal = TRUE;
      }
    }
    break;

  case CLIENT_OPCODE_DEL_WITH_META:
  case CLIENT_OPCODE_SET_WITH_META:
    if (request) {
      proto_tree_add_item(extras_tree, hf_meta_flags, tvb, offset, 4, ENC_BIG_ENDIAN);
      offset += 4;
      proto_tree_add_item(extras_tree, hf_meta_expiration, tvb, offset, 4, ENC_BIG_ENDIAN);
      offset += 4;
      proto_tree_add_item(extras_tree, hf_meta_revseqno, tvb, offset, 8, ENC_BIG_ENDIAN);
      offset += 8;
      proto_tree_add_item(extras_tree, hf_meta_cas, tvb, offset, 8, ENC_BIG_ENDIAN);
      offset += 8;

      /*The previous 24 bytes are required. The next two fields are optional,
       * hence we are checking the extlen to see what fields we have. As they
       * are different lengths we can do this by just checking the length.*/

      // Options field (4 bytes)
      if (extlen == 28 || extlen == 30) {
          /* TODO: these fields are all 16 bits wide, but field is 32 bits? */
          proto_tree_add_bitmask(
                  extras_tree,
                  tvb,
                  offset,
                  hf_meta_options,
                  ett_extras_flags,
                  (opcode == CLIENT_OPCODE_DEL_WITH_META) ?
                      del_with_meta_extra_flags : set_with_meta_extra_flags,
                  ENC_BIG_ENDIAN);
          offset += 4;
      }
      // Meta Length field (2 bytes)
      if (extlen == 26 || extlen == 30) {
        proto_tree_add_item(extras_tree, hf_metalen, tvb, offset, 2, ENC_BIG_ENDIAN);
        offset += 2;
      }
    }
    break;

  case CLIENT_OPCODE_GET_META:
    if (request) {
      if(extlen) {
        proto_tree_add_item(extras_tree, hf_meta_reqextmeta, tvb, offset, 1, ENC_BIG_ENDIAN);
        offset += 1;
      }
    } else {
      proto_tree_add_item(extras_tree, hf_meta_deleted, tvb, offset, 4, ENC_BIG_ENDIAN);
      offset += 4;
      proto_tree_add_item(extras_tree, hf_meta_flags, tvb, offset, 4, ENC_BIG_ENDIAN);
      offset += 4;
      proto_tree_add_item(extras_tree, hf_exptime, tvb, offset, 4, ENC_BIG_ENDIAN);
      offset += 4;
      proto_tree_add_item(extras_tree, hf_extras_meta_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
      offset += 8;
      if (extlen == 21) {
        proto_tree_add_item(extras_tree, hf_confres, tvb, offset, 1, ENC_BIG_ENDIAN);
        offset += 1;
      }
    }
    break;
  case CLIENT_OPCODE_COLLECTIONS_GET_ID:
    if (!request) {
      proto_tree_add_item(extras_tree, hf_collection_manifest_id, tvb, offset, 8, ENC_BIG_ENDIAN);
      offset += 8;
      proto_tree_add_item(extras_tree, hf_collection_key_id, tvb, offset, 4, ENC_BIG_ENDIAN);
      offset += 4;
    }
    break;
  case CLIENT_OPCODE_RANGE_SCAN_CONTINUE:
    // https://github.com/couchbase/kv_engine/blob/master/docs/range_scans/range_scan_continue.md
    if (request) {
      proto_tree_add_item(extras_tree, hf_range_scan_uuid, tvb, offset, 16, ENC_BIG_ENDIAN);
      offset += 16;
      proto_tree_add_item(extras_tree, hf_range_scan_item_limit, tvb, offset, 4, ENC_BIG_ENDIAN);
      offset += 4;
      proto_tree_add_item(extras_tree, hf_range_scan_time_limit, tvb, offset, 4, ENC_BIG_ENDIAN);
      offset += 4;
      proto_tree_add_item(extras_tree, hf_range_scan_byte_limit, tvb, offset, 4, ENC_BIG_ENDIAN);
      offset += 4;
    }
    break;
  case CLIENT_OPCODE_RANGE_SCAN_CANCEL:
    // https://github.com/couchbase/kv_engine/blob/master/docs/range_scans/range_scan_cancel.md
    if (request) {
      proto_tree_add_item(extras_tree, hf_range_scan_uuid, tvb, offset, 16, ENC_BIG_ENDIAN);
      offset += 16;
    }
    break;
  default:
    if (extlen) {
      /* Decode as unknown extras */
      proto_tree_add_item(extras_tree, hf_extras_unknown, tvb, offset, extlen, ENC_NA);
      offset += extlen;
    }
    break;
  }
  if (illegal) {
    proto_tree_add_expert_format(extras_tree, pinfo, &ef_warn_shall_not_have_extras, tvb, offset, 0,
                           "%s %s should not have extras",
                           val_to_str_ext(opcode, &client_opcode_vals_ext, "Opcode 0x%x"),
                           request ? "Request" : "Response");
    offset += extlen;
  } else if (missing) {

    proto_tree_add_expert_format(tree, pinfo, &ef_warn_must_have_extras, tvb, offset, 0,
                           "%s %s must have Extras",
                           val_to_str_ext(opcode, &client_opcode_vals_ext, "Opcode Ox%x"),
                           request ? "Request" : "Response");
}

  if ((offset - save_offset) != extlen) {
    expert_add_info_format(pinfo, extras_item, &ef_warn_illegal_extras_length,
                           "Illegal Extras length, should be %d", offset - save_offset);
  }
}

/*
  Decode an unsigned leb128 int from a slice within a tvbuff_t
  @param tvb buffer to read from
  @param start index of the first byte of 'slice'
  @param end index of the last byte of the buffer 'slice'
  @param [out] value the decoded value
  @returns next byte after the leb128 bytes or -1 if we failed to decode
*/
static gint
dissect_unsigned_leb128(tvbuff_t *tvb, gint start, gint end, guint32* value) {
    guint8 byte = tvb_get_guint8(tvb, start);
    *value = byte & 0x7f;


    if ((byte & 0x80) == 0x80) {
        guint32 shift = 7;
        gint byte_idx;
        for (byte_idx = start+1; byte_idx < end; byte_idx++) {
            byte = tvb_get_guint8(tvb, byte_idx);
            /* Ensure we are using a valid shift */
            if (shift > 32)
                return -1;
            *value |= (byte & 0x7f) << shift;
            if ((byte & 0x80) == 0) {
                break;
            }
            shift += 7;
        }
        return (byte_idx == end) ? -1 : byte_idx + 1;
    }
    return start + 1;
}

static void dissect_server_key(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gint offset, int keylen, guint8 opcode, bool request) {
  if (keylen == 0) {
    switch (opcode) {
      case SERVER_OPCODE_GET_AUTHORIZATION:
        if (request) {
          proto_tree_add_expert_format(tree, pinfo, &ef_warn_must_have_key,
                                       tvb, offset, 0,
                                       "GetAuthorization request must have key");
        }
        return;
      case SERVER_OPCODE_CLUSTERMAP_CHANGE_NOTIFICATION:
        if (request) {
          proto_tree_add_expert_format(tree, pinfo, &ef_warn_must_have_key,
                                       tvb, offset, 0,
                                       "ClustermapChangeNotification request must have key");
        }
      case SERVER_OPCODE_AUTHENTICATE:
      case SERVER_OPCODE_ACTIVE_EXTERNAL_USERS:
        // Success! none of these commands want a key
      default:
        // Probably ok as we don't know about the opcode
        return;
    }
  }

  proto_item *ti = proto_tree_add_item(tree, hf_key, tvb, offset, keylen, ENC_UTF_8 | ENC_STR_HEX);

  switch (opcode) {
    case SERVER_OPCODE_CLUSTERMAP_CHANGE_NOTIFICATION:
      if (!request) {
        expert_add_info_format(pinfo, ti, &ef_warn_shall_not_have_key,
                               "ClustermapChangeNotification response shall not have key");
      }
      break;

    case SERVER_OPCODE_AUTHENTICATE:
    case SERVER_OPCODE_ACTIVE_EXTERNAL_USERS:
        expert_add_info_format(pinfo, ti, &ef_warn_shall_not_have_key,
                               "%s %s shall not have Key",
                               val_to_str_ext(opcode,
                                              &server_opcode_vals_ext,
                                              "Opcode 0x%x"),
                               request ? "Request" : "Response");
      break;

    case SERVER_OPCODE_GET_AUTHORIZATION:
      if (!request) {
          expert_add_info_format(pinfo, ti, &ef_warn_shall_not_have_key,
                                 "GetAuthorization response shall not have key");
      }
      break;
    default:
      break;
  }
}

static void
dissect_client_key(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
                   gint offset, int keylen, guint8 opcode, gboolean request)
{
  proto_item *ti = NULL;
  gboolean    illegal = FALSE;  /* Set when key shall not be present */
  gboolean    missing = FALSE;  /* Set when key is missing */

  if (keylen) {
    bool collection_encoded_key = TRUE;
    switch (opcode) {
      case CLIENT_OPCODE_STAT:
      case CLIENT_OPCODE_HELLO:
      case CLIENT_OPCODE_SASL_AUTH:
      case CLIENT_OPCODE_SASL_STEP:
      case CLIENT_OPCODE_IOCTL_GET:
      case CLIENT_OPCODE_IOCTL_SET:
      case CLIENT_OPCODE_DCP_CONTROL:
      case CLIENT_OPCODE_SET_PARAM:
      case CLIENT_OPCODE_CREATE_BUCKET:
      case CLIENT_OPCODE_DELETE_BUCKET:
      case CLIENT_OPCODE_SELECT_BUCKET:
      case CLIENT_OPCODE_IFCONFIG:
        collection_encoded_key = FALSE;
        break;
      default:
        break;
    }

    ti = proto_tree_add_item(tree, hf_key, tvb, offset, keylen, ENC_UTF_8|ENC_STR_HEX);

    if (collection_encoded_key) {
      /* assume collections are enabled and add a field for the CID */
      guint32 cid = 0;
      gint ok = dissect_unsigned_leb128(tvb, offset, offset + keylen, &cid);

      /* Add collection info to a subtree */
      proto_tree *cid_tree = proto_item_add_subtree(ti, ett_collection_key);

      if (ok == -1) {
        /* cid decode issue, could just be a non-collection stream, don't warn
           just add some info */
        proto_tree_add_string_format(cid_tree,
                                     hf_collection_key_logical,
                                     tvb,
                                     offset,
                                     keylen,
                                     NULL,
                                     "Collection ID didn't decode, maybe no CID.");
      } else {
        proto_tree_add_uint(cid_tree, hf_collection_key_id, tvb, offset,
                            (ok - offset), cid);
        proto_tree_add_item(cid_tree, hf_collection_key_logical, tvb,
                            ok, keylen - (ok - offset), ENC_UTF_8 | ENC_STR_HEX);
      }
    }
    offset += keylen;
  }

  /* inSanity check */
  if (keylen) {
    switch (opcode) {
    case CLIENT_OPCODE_QUIT:
    case CLIENT_OPCODE_QUITQ:
    case CLIENT_OPCODE_NOOP:
    case CLIENT_OPCODE_VERSION:
    case CLIENT_OPCODE_DCP_FAILOVER_LOG_REQUEST:
    case CLIENT_OPCODE_DCP_BUFFER_ACKNOWLEDGEMENT:
    case CLIENT_OPCODE_GET_ALL_VB_SEQNOS:
      /* Request and Response must not have key */
      illegal = TRUE;
      break;

    case CLIENT_OPCODE_SET:
    case CLIENT_OPCODE_ADD:
    case CLIENT_OPCODE_REPLACE:
    case CLIENT_OPCODE_DELETE:
    case CLIENT_OPCODE_SETQ:
    case CLIENT_OPCODE_ADDQ:
    case CLIENT_OPCODE_REPLACEQ:
    case CLIENT_OPCODE_DELETEQ:
    case CLIENT_OPCODE_FLUSH:
    case CLIENT_OPCODE_APPEND:
    case CLIENT_OPCODE_PREPEND:
    case CLIENT_OPCODE_FLUSHQ:
    case CLIENT_OPCODE_APPENDQ:
    case CLIENT_OPCODE_PREPENDQ:
      /* Response must not have a key */
      if (!request) {
        illegal = TRUE;
      }
      break;

    case CLIENT_OPCODE_DCP_ADD_STREAM:
    case CLIENT_OPCODE_DCP_CLOSE_STREAM:
    case CLIENT_OPCODE_DCP_STREAM_END:
    case CLIENT_OPCODE_DCP_SNAPSHOT_MARKER:
    case CLIENT_OPCODE_DCP_FLUSH:
    case CLIENT_OPCODE_DCP_SET_VBUCKET_STATE:
      /* Request must not have a key */
      if (request) {
        illegal = TRUE;
      }
      break;
    }
  } else {
    switch (opcode) {
    case CLIENT_OPCODE_GET:
    case CLIENT_OPCODE_GETQ:
    case CLIENT_OPCODE_GETK:
    case CLIENT_OPCODE_GETKQ:
    case CLIENT_OPCODE_SET:
    case CLIENT_OPCODE_ADD:
    case CLIENT_OPCODE_REPLACE:
    case CLIENT_OPCODE_DELETE:
    case CLIENT_OPCODE_SETQ:
    case CLIENT_OPCODE_ADDQ:
    case CLIENT_OPCODE_REPLACEQ:
    case CLIENT_OPCODE_DELETEQ:
    case CLIENT_OPCODE_INCREMENT:
    case CLIENT_OPCODE_DECREMENT:
    case CLIENT_OPCODE_INCREMENTQ:
    case CLIENT_OPCODE_DECREMENTQ:
    case CLIENT_OPCODE_DCP_OPEN_CONNECTION:
    case CLIENT_OPCODE_DCP_MUTATION:
    case CLIENT_OPCODE_DCP_DELETION:
    case CLIENT_OPCODE_DCP_EXPIRATION:
    case CLIENT_OPCODE_DCP_SYSTEM_EVENT:
      /* Request must have key */
      if (request) {
        missing = TRUE;
      }
      break;
    }
  }

  if (illegal) {
    expert_add_info_format(pinfo, ti, &ef_warn_shall_not_have_key, "%s %s shall not have Key",
                           val_to_str_ext(opcode, &client_opcode_vals_ext, "Opcode 0x%x"),
                           request ? "Request" : "Response");
  } else if (missing) {
    proto_tree_add_expert_format(tree, pinfo, &ef_warn_must_have_key, tvb, offset, 0,
                           "%s %s must have Key",
                           val_to_str_ext(opcode, &client_opcode_vals_ext, "Opcode Ox%x"),
                           request ? "Request" : "Response");
  }
}

static void
dissect_multipath_lookup_response(tvbuff_t *tvb, packet_info *pinfo,
                                  proto_tree *tree, gint offset, guint32 value_len)
{
  gint end = offset + value_len;
  int spec_idx = 0;

  while (offset < end) {
    proto_item *ti;
    proto_tree *multipath_tree;
    tvbuff_t *json_tvb;
    guint32 result_len;
    gint start_offset = offset;

    ti = proto_tree_add_subtree_format(tree, tvb, offset, -1, ett_multipath,
                                       &multipath_tree, "Lookup Result [ %u ]",
                                       spec_idx);

    proto_tree_add_item(multipath_tree, hf_status, tvb, offset, 2,
                        ENC_BIG_ENDIAN);
    offset += 2;
    proto_tree_add_item_ret_uint(multipath_tree, hf_value_length, tvb, offset,
                                 4, ENC_BIG_ENDIAN, &result_len);
    offset += 4;

    proto_tree_add_item(multipath_tree, hf_value, tvb, offset, result_len,
                        ENC_ASCII | ENC_NA);
    if (result_len > 0) {
        json_tvb = tvb_new_subset_length(tvb, offset, result_len);
        call_dissector(json_handle, json_tvb, pinfo, multipath_tree);
    }
    offset += result_len;

    proto_item_set_len(ti, offset - start_offset);

    spec_idx++;
  }
}

static void
dissect_multipath_mutation_response(tvbuff_t *tvb, packet_info *pinfo,
                                    proto_tree *tree, gint offset, guint32 value_len)
{
  gint end = offset + value_len;
  int spec_idx = 0;

  /* Expect a variable number of mutation responses:
   * - If response.status == SUCCESS, zero to N responses, one for each mutation
   *   spec which returns a value.
   * - If response.status != SUCCESS, exactly 1 response, for first failing
   *   spec.
   */
  while (offset < end) {
    proto_item *ti;
    proto_tree *multipath_tree;
    tvbuff_t *json_tvb;
    guint32 status;
    gint start_offset = offset;

    ti = proto_tree_add_subtree_format(tree, tvb, offset, -1, ett_multipath,
                                       &multipath_tree, "Mutation Result [ %u ]",
                                       spec_idx);

    proto_tree_add_item(multipath_tree, hf_multipath_index, tvb, offset, 1,
                        ENC_BIG_ENDIAN);
    offset += 1;
    proto_tree_add_item_ret_uint(multipath_tree, hf_status, tvb, offset, 2,
                                 ENC_BIG_ENDIAN, &status);
    offset += 2;
    if (status == STATUS_SUCCESS) {
      guint32 result_len;
      proto_tree_add_item_ret_uint(multipath_tree, hf_value_length, tvb,
                                   offset, 4, ENC_BIG_ENDIAN, &result_len);
      offset += 4;

      proto_tree_add_item(multipath_tree, hf_value, tvb, offset, result_len,
                          ENC_ASCII | ENC_NA);
      if (result_len > 0) {
        json_tvb = tvb_new_subset_length(tvb, offset, result_len);
        call_dissector(json_handle, json_tvb, pinfo, multipath_tree);
      }
      offset += result_len;
    }
    proto_item_set_len(ti, offset - start_offset);

    spec_idx++;
  }
}

static void
dissect_multipath_value(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
                        gint offset, guint32 value_len, gboolean is_mutation,
                        gboolean request)
{
  gint end = offset + value_len;
  int spec_idx = 0;
  proto_item *ti;
  proto_tree *multipath_tree;

  if (request) {
    gint min_spec_size;

    /* Minimum size is the fixed header. */
    min_spec_size = (is_mutation ? 8 : 4);

    while (offset + min_spec_size <= end) {
      guint32 path_len;
      guint32 spec_value_len = 0;
      gint start_offset = offset;

      ti = proto_tree_add_subtree_format(tree, tvb, offset, -1, ett_multipath,
                                         &multipath_tree,
                                         (is_mutation ? "Mutation spec [ %u ]"
                                                      : "Lookup spec [ %u ]"),
                                         spec_idx);

      proto_tree_add_item(multipath_tree, hf_multipath_opcode, tvb, offset, 1,
                          ENC_BIG_ENDIAN);
      offset += 1;
      proto_tree_add_bitmask(multipath_tree, tvb, offset, hf_subdoc_flags,
                             ett_extras_flags, subdoc_flags, ENC_BIG_ENDIAN);
      offset += 1;

      proto_tree_add_item_ret_uint(multipath_tree, hf_multipath_pathlen, tvb,
                                   offset, 2, ENC_BIG_ENDIAN, &path_len);
      offset += 2;

      if (is_mutation) {
        proto_tree_add_item_ret_uint(multipath_tree, hf_multipath_valuelen,
                                     tvb, offset, 4, ENC_BIG_ENDIAN,
                                     &spec_value_len);
        offset += 4;
      }

      if (path_len) {
        proto_tree_add_item(multipath_tree, hf_multipath_path, tvb, offset, path_len,
                            ENC_ASCII | ENC_NA);
        offset += path_len;
      }

      if (spec_value_len > 0) {
        proto_tree_add_item(multipath_tree, hf_multipath_value, tvb, offset,
                            spec_value_len, ENC_ASCII | ENC_NA);
        offset += spec_value_len;
      }

      proto_item_set_len(ti, offset - start_offset);

      spec_idx++;
    }
  } else {
    if (is_mutation) {
      dissect_multipath_mutation_response(tvb, pinfo, tree, offset, value_len);
    } else {
      dissect_multipath_lookup_response(tvb, pinfo, tree, offset, value_len);
    }
  }
}

static void
dissect_value(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
              gint offset, guint32 value_len, guint16 path_len, guint8 opcode,
              gboolean request, guint8 datatype)
{
  proto_item *ti = NULL;
  gboolean    illegal = FALSE;  /* Set when value shall not be present */
  gboolean    missing = FALSE;  /* Set when value is missing */

  if (value_len > 0) {
    if (opcode == CLIENT_OPCODE_OBSERVE) {
      proto_tree *observe_tree;
      gint oo = offset, end = offset + value_len;
      ti = proto_tree_add_item(tree, hf_observe, tvb, offset, value_len, ENC_ASCII);
      observe_tree = proto_item_add_subtree(ti, ett_observe);
      while (oo < end) {
        guint16 kl; /* keylength */
        proto_tree_add_item(observe_tree, hf_observe_vbucket, tvb, oo, 2, ENC_BIG_ENDIAN);
        oo += 2;
        kl = tvb_get_ntohs(tvb, oo);
        proto_tree_add_item(observe_tree, hf_observe_keylength, tvb, oo, 2, ENC_BIG_ENDIAN);
        oo += 2;
        proto_tree_add_item(observe_tree, hf_observe_key, tvb, oo, kl, ENC_ASCII);
        oo += kl;
        if (!request) {
          proto_tree_add_item(observe_tree, hf_observe_status, tvb, oo, 1, ENC_BIG_ENDIAN);
          oo++;
          proto_tree_add_item(observe_tree, hf_observe_cas, tvb, oo, 8, ENC_BIG_ENDIAN);
          oo += 8;
        }
      }
    } else if (opcode == CLIENT_OPCODE_OBSERVE_SEQNO) {
      if (request) {
        ti = proto_tree_add_item(tree, hf_observe_vbucket_uuid, tvb, offset, 8, ENC_BIG_ENDIAN);
        if (value_len != 8) {
          expert_add_info_format(pinfo, ti, &ef_warn_illegal_value_length, "Illegal Value length, should be 8");
        }
      } else {
        /*
         * <format_type, vbucket id, vbucket uuid, last_persisted_seqno, current_seqno>
         *
         * - format_type is of type uint8_t and it describes whether
         *   the vbucket has failed over or not. 1 indicates a hard
         *   failover, 0 indicates otherwise.
         * - vbucket id is of type uint16_t and it is the identifier for
         *   the vbucket.
         * - vbucket uuid is of type uint64_t and it represents a UUID for
         *    the vbucket.
         * - last_persisted_seqno is of type uint64_t and it is the
         *   last sequence number that was persisted for this
         *   vbucket.
         * - current_seqno is of the type uint64_t and it is the
         *   sequence number of the latest mutation in the vbucket.
         *
         * In the case of a hard failover, the tuple is of the form
         * <format_type, vbucket id, vbucket uuid, last_persisted_seqno, current_seqno,
         * old vbucket uuid, last_received_seqno>
         *
         * - old vbucket uuid is of type uint64_t and it is the
         *   vbucket UUID of the vbucket prior to the hard failover.
         *
         * - last_received_seqno is of type uint64_t and it is the
         *   last received sequence number in the old vbucket uuid.
         *
         * The other fields are the same as that mentioned in the normal case.
         */
        guint8 failed_over;

        proto_tree_add_item(tree, hf_observe_failed_over, tvb, offset, 1, ENC_BIG_ENDIAN);
        failed_over = tvb_get_guint8(tvb, offset);
        offset++;
        proto_tree_add_item(tree, hf_observe_vbucket, tvb, offset, 2, ENC_BIG_ENDIAN);
        offset += 2;
        proto_tree_add_item(tree, hf_observe_vbucket_uuid, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        proto_tree_add_item(tree, hf_observe_last_persisted_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        proto_tree_add_item(tree, hf_observe_current_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        if (failed_over) {
          proto_tree_add_item(tree, hf_observe_old_vbucket_uuid, tvb, offset, 8, ENC_BIG_ENDIAN);
          offset += 8;
          proto_tree_add_item(tree, hf_observe_last_received_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        }
      }
    } else if (!request && (opcode == CLIENT_OPCODE_DCP_STREAM_REQUEST || opcode == CLIENT_OPCODE_DCP_FAILOVER_LOG_REQUEST)) {
      if (value_len % 16 != 0) {
        expert_add_info_format(pinfo, ti, &ef_warn_illegal_value_length, "Response with bad failover log length");
      } else {
        proto_tree *failover_log_tree;
        gint cur = offset, end = offset + value_len;
        ti = proto_tree_add_item(tree, hf_failover_log, tvb, offset, value_len, ENC_ASCII);
        failover_log_tree = proto_item_add_subtree(ti, ett_failover_log);
        ti = proto_tree_add_uint(failover_log_tree, hf_failover_log_size, tvb, offset, 0, (end - cur) / 16);
        proto_item_set_generated(ti);
        while (cur < end) {
          proto_tree_add_item(failover_log_tree, hf_failover_log_vbucket_uuid, tvb, cur, 8, ENC_BIG_ENDIAN);
          cur += 8;
          proto_tree_add_item(failover_log_tree, hf_failover_log_vbucket_seqno, tvb, cur, 8, ENC_BIG_ENDIAN);
          cur += 8;
        }
      }
    } else if (!request && opcode == CLIENT_OPCODE_GET_ALL_VB_SEQNOS) {
      if (value_len % 10 != 0) {
        expert_add_info_format(pinfo, ti, &ef_warn_illegal_value_length, "Response with bad body length");
      } else {
        proto_tree *vbucket_states_tree;
        gint cur = offset, end = offset + value_len;
        ti = proto_tree_add_item(tree, hf_vbucket_states, tvb, offset, value_len, ENC_ASCII);
        vbucket_states_tree = proto_item_add_subtree(ti, ett_vbucket_states);
        ti = proto_tree_add_uint(vbucket_states_tree, hf_vbucket_states_size, tvb, offset, 0, (end - cur) / 10);
        proto_item_set_generated(ti);
        while (cur < end) {
          proto_tree_add_item(vbucket_states_tree, hf_vbucket_states_id, tvb, cur, 2, ENC_BIG_ENDIAN);
          cur += 2;
          proto_tree_add_item(vbucket_states_tree, hf_vbucket_states_seqno, tvb, cur, 8, ENC_BIG_ENDIAN);
          cur += 8;
        }
      }
    } else if (!request && (opcode == CLIENT_OPCODE_INCREMENT || opcode == CLIENT_OPCODE_DECREMENT)) {
      ti = proto_tree_add_item(tree, hf_uint64_response, tvb, offset, 8, ENC_BIG_ENDIAN);
      if (value_len != 8) {
        expert_add_info_format(pinfo, ti, &ef_warn_illegal_value_length, "Illegal Value length, should be 8");
      }
    } else if (has_json_value(request, opcode)) {
      tvbuff_t *json_tvb;
      ti = proto_tree_add_item(tree, hf_value, tvb, offset, value_len, ENC_ASCII | ENC_NA);
      json_tvb = tvb_new_subset_length(tvb, offset, value_len);
      call_dissector(json_handle, json_tvb, pinfo, tree);

    } else if (opcode == CLIENT_OPCODE_SUBDOC_MULTI_LOOKUP ||
               opcode == CLIENT_OPCODE_SUBDOC_MULTI_MUTATION) {
      dissect_multipath_value(tvb, pinfo, tree, offset, value_len,
                              (opcode == CLIENT_OPCODE_SUBDOC_MULTI_MUTATION),
                              request);

    } else if (opcode == CLIENT_OPCODE_HELLO) {
      gint curr = offset, end = offset + value_len;
      proto_tree *hello_features_tree;
      ti = proto_tree_add_item(tree, hf_hello_features, tvb, offset, value_len, ENC_ASCII);
      hello_features_tree = proto_item_add_subtree(ti, ett_hello_features);
      while (curr < end) {
        proto_tree_add_item(hello_features_tree, hf_hello_features_feature, tvb, curr, 2, ENC_BIG_ENDIAN);
        curr += 2;
      }
    } else if (!request && opcode == CLIENT_OPCODE_RANGE_SCAN_CREATE) {
      proto_tree_add_item(tree, hf_range_scan_uuid, tvb, offset, 16, ENC_BIG_ENDIAN);
    } else if (path_len != 0) {
        ti = proto_tree_add_item(tree, hf_path, tvb, offset, path_len, ENC_ASCII | ENC_NA);
        value_len -= path_len;
        if (value_len > 0) {
            ti = proto_tree_add_item(tree, hf_value, tvb, offset + path_len,
                                     value_len, ENC_ASCII | ENC_NA);
        }
    } else if (request && opcode == CLIENT_OPCODE_CREATE_BUCKET) {
      gint sep, equals_pos, sep_pos, config_len;
      proto_tree *key_tree, *config_tree = NULL;

      /* There are 2 main items stored in the value. The bucket type (represented by a path to the engine) and the
       * bucket config. These are separated by a NULL byte with the bucket type coming first.*/

      sep = tvb_find_guint8(tvb, offset, value_len, 0x00);
      if (sep == -1) {
        ti = proto_tree_add_item(tree, hf_value, tvb, offset, value_len, ENC_ASCII);
        expert_add_info_format(pinfo, ti, &ef_separator_not_found, "Null byte not found");
      } else {
        proto_tree_add_item(tree, hf_bucket_type, tvb, offset, sep - offset, ENC_ASCII | ENC_NA);
        config_len = value_len - (sep - offset) - 1; //Don't include NULL byte in length
        if(config_len <= 0) {
          expert_add_info_format(pinfo, ti, &ef_separator_not_found, "Separator not found in expected location");
        } else {
          offset = sep + 1;// Ignore NULL byte

          ti = proto_tree_add_item(tree, hf_bucket_config, tvb, offset, config_len, ENC_ASCII | ENC_NA);
          config_tree = proto_item_add_subtree(ti, ett_config);
        }

        /* The config is arranged as "key=value;key=value..."*/
        while (config_len > 0) {
          // Get the key
          equals_pos = tvb_find_guint8(tvb, offset, config_len, 0x3d);
          if (equals_pos == -1) {
            expert_add_info_format(pinfo, ti, &ef_illegal_value, "Each key needs a value");
            break; // Break out the while loop
          }
          ti = proto_tree_add_item(config_tree, hf_config_key, tvb, offset, equals_pos - offset, ENC_ASCII | ENC_NA);
          key_tree = proto_item_add_subtree(ti, ett_config_key);
          config_len -= (equals_pos - offset + 1);
          offset = equals_pos + 1;
          if (config_len <= 0) {
            expert_add_info_format(pinfo, ti, &ef_illegal_value, "Corresponding value missing");
            break;//Break out of while loop
          }

          // Get the value
          sep_pos = tvb_find_guint8(tvb, offset, config_len, 0x3b);
          if (sep_pos == -1) {
            expert_add_info_format(pinfo, ti, &ef_separator_not_found, "Each key-value pair must be terminated by semi-colon");
            break; // Break out the while loop
          }
          proto_tree_add_item(key_tree, hf_config_value, tvb, offset, sep_pos - offset, ENC_ASCII | ENC_NA);
          config_len -= (sep_pos - offset + 1);
          offset = sep_pos + 1;
        }
      }
    } else if ((datatype & DT_XATTR) && (opcode == CLIENT_OPCODE_SET_WITH_META ||
      opcode == CLIENT_OPCODE_DCP_MUTATION || opcode == CLIENT_OPCODE_DCP_DELETION ||
      opcode == CLIENT_OPCODE_DCP_EXPIRATION || opcode == CLIENT_OPCODE_DCP_PREPARE ||
      opcode == CLIENT_OPCODE_DEL_WITH_META || opcode == CLIENT_OPCODE_ADD_WITH_META ||
      opcode == CLIENT_OPCODE_SETQ_WITH_META || opcode == CLIENT_OPCODE_DELQ_WITH_META ||
      opcode == CLIENT_OPCODE_ADDQ_WITH_META )) {

      dissect_dcp_xattrs(tvb, tree, value_len, offset, pinfo);
    } else if (request && opcode == CLIENT_OPCODE_GET_ERROR_MAP) {
      if (value_len != 2) {
        expert_add_info_format(pinfo, ti, &ef_warn_illegal_value_length, "Illegal Value length, should be 2");
        ti = proto_tree_add_item(tree, hf_value, tvb, offset, value_len, ENC_ASCII | ENC_NA);
      } else {
        ti = proto_tree_add_item(tree, hf_get_errmap_version, tvb, offset, value_len, ENC_BIG_ENDIAN);
      }
    } else if (request && opcode == CLIENT_OPCODE_DCP_SNAPSHOT_MARKER) {
        if (value_len < 20) {
            expert_add_info_format(pinfo, ti, &ef_warn_illegal_value_length, "Illegal Value length, should be at least 20");
            ti = proto_tree_add_item(tree, hf_value, tvb, offset, value_len, ENC_ASCII | ENC_NA);
        }

        proto_tree_add_item(tree, hf_extras_start_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        proto_tree_add_item(tree, hf_extras_end_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
        offset += 8;
        proto_tree_add_bitmask(tree, tvb, offset, hf_extras_flags, ett_extras_flags, snapshot_marker_flags, ENC_BIG_ENDIAN);
        offset += 4;

        if (value_len > 20) {
            if (value_len < 36) {
                expert_add_info_format(pinfo, ti, &ef_warn_illegal_value_length, "Illegal Value length, should be at least 36");
                ti = proto_tree_add_item(tree, hf_value, tvb, offset, value_len, ENC_ASCII | ENC_NA);
            }

            proto_tree_add_item(tree, hf_extras_max_visible_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
            offset += 8;
            proto_tree_add_item(tree, hf_extras_high_completed_seqno, tvb, offset, 8, ENC_BIG_ENDIAN);
            offset += 8;

            if (value_len > 36) {
                if (value_len != 44) {
                    expert_add_info_format(pinfo, ti, &ef_warn_illegal_value_length, "Illegal Value length, should be 44");
                    ti = proto_tree_add_item(tree, hf_value, tvb, offset, value_len, ENC_ASCII | ENC_NA);
                }

                proto_tree_add_item(tree, hf_extras_timestamp, tvb, offset, 8, ENC_BIG_ENDIAN);
            }
        }
    } else {
      ti = proto_tree_add_item(tree, hf_value, tvb, offset, value_len, ENC_ASCII | ENC_NA);
#ifdef HAVE_SNAPPY
      if (datatype & DT_SNAPPY) {
        size_t orig_size = 0;
        snappy_status ret;
        guchar *decompressed_buffer = NULL;
        tvbuff_t* compressed_tvb = NULL;

        ret = snappy_uncompressed_length(tvb_get_ptr(tvb, offset, -1),
                                         tvb_captured_length_remaining(tvb, offset),
                                         &orig_size);
        if (ret == SNAPPY_OK) {
          decompressed_buffer = (guchar*)wmem_alloc(pinfo->pool, orig_size);
          ret = snappy_uncompress(tvb_get_ptr(tvb, offset, -1),
                                  tvb_captured_length_remaining(tvb, offset),
                                  decompressed_buffer,
                                  &orig_size);
          if (ret == SNAPPY_OK) {
            compressed_tvb = tvb_new_child_real_data(tvb, decompressed_buffer, (guint32)orig_size, (guint32)orig_size);
            add_new_data_source(pinfo, compressed_tvb, "Decompressed Data");
            if (datatype & DT_JSON) {
              call_dissector(json_handle, compressed_tvb, pinfo, tree);
            }
          } else {
            expert_add_info_format(pinfo, ti, &ef_compression_error, "Error uncompressing snappy data");
          }
        } else {
            expert_add_info_format(pinfo, ti, &ef_compression_error, "Error uncompressing snappy data");
        }
      }
#endif
    }
  }

  /* Sanity check */
  if (value_len) {
    switch (opcode) {
    case CLIENT_OPCODE_GET:
    case CLIENT_OPCODE_GETQ:
    case CLIENT_OPCODE_GETK:
    case CLIENT_OPCODE_GETKQ:
    case CLIENT_OPCODE_INCREMENT:
    case CLIENT_OPCODE_DECREMENT:
    case CLIENT_OPCODE_VERSION:
    case CLIENT_OPCODE_INCREMENTQ:
    case CLIENT_OPCODE_DECREMENTQ:
    case CLIENT_OPCODE_DCP_OPEN_CONNECTION:
    case CLIENT_OPCODE_DCP_ADD_STREAM:
    case CLIENT_OPCODE_DCP_CLOSE_STREAM:
    case CLIENT_OPCODE_DCP_FAILOVER_LOG_REQUEST:
    case CLIENT_OPCODE_DCP_STREAM_END:
    case CLIENT_OPCODE_DCP_DELETION:
    case CLIENT_OPCODE_DCP_EXPIRATION:
    case CLIENT_OPCODE_DCP_FLUSH:
    case CLIENT_OPCODE_DCP_SET_VBUCKET_STATE:
      /* Request must not have value */
      if (request) {
        illegal = TRUE;
      }
      break;
    case CLIENT_OPCODE_DELETE:
    case CLIENT_OPCODE_QUIT:
    case CLIENT_OPCODE_FLUSH:
    case CLIENT_OPCODE_NOOP:
    case CLIENT_OPCODE_DELETEQ:
    case CLIENT_OPCODE_QUITQ:
    case CLIENT_OPCODE_FLUSHQ:
      /* Request and Response must not have value */
      illegal = TRUE;
      break;
    case CLIENT_OPCODE_SET:
    case CLIENT_OPCODE_ADD:
    case CLIENT_OPCODE_REPLACE:
    case CLIENT_OPCODE_SETQ:
    case CLIENT_OPCODE_ADDQ:
    case CLIENT_OPCODE_REPLACEQ:
    case CLIENT_OPCODE_APPEND:
    case CLIENT_OPCODE_PREPEND:
    case CLIENT_OPCODE_APPENDQ:
    case CLIENT_OPCODE_PREPENDQ:
      /* Response must not have value */
      if (!request) {
        illegal = TRUE;
      }
      break;
    }
  } else {
    switch (opcode) {
    case CLIENT_OPCODE_DCP_FAILOVER_LOG_REQUEST:
      /* Successful response must have value */
      if (!request) {
        missing = TRUE;
      }
      break;
    }
  }

  if (illegal) {
    expert_add_info_format(pinfo, ti, &ef_warn_shall_not_have_value, "%s %s shall not have Value",
                           val_to_str_ext(opcode, &client_opcode_vals_ext, "Opcode 0x%x"),
                           request ? "Request" : "Response");
  } else if (missing) {
    expert_add_info_format(pinfo, ti, &ei_value_missing, "%s %s must have Value",
                           val_to_str_ext(opcode, &client_opcode_vals_ext, "Opcode 0x%x"),
                           request ? "Request" : "Response");
  }
}

static void flex_frame_duration_dissect(tvbuff_t* tvb,
                                        proto_tree* frame_tree,
                                        gint offset,
                                        gint length) {

  if (length != 2) {
    proto_tree_add_expert_format(frame_tree,
                                 NULL,
                                 &ef_warn_unknown_flex_len,
                                 tvb,
                                 offset,
                                 length,
                                 "FlexFrame: RX/TX Duration with illegal length %d", length);
  } else {
    guint16 encoded_micros = tvb_get_ntohs(tvb, offset);
    proto_tree_add_double(frame_tree,
                          hf_flex_frame_tracing_duration,
                          tvb,
                          offset,
                          2,
                          pow(encoded_micros, 1.74) / 2);
  }
}

static void flex_frame_ru_usage_dissect(tvbuff_t* tvb,
                                        proto_tree* frame_tree,
                                        gint offset,
                                        gint length) {

  if (length != 2) {
    proto_tree_add_expert_format(frame_tree,
                                 NULL,
                                 &ef_warn_unknown_flex_len,
                                 tvb,
                                 offset,
                                 length,
                                 "Read unit illegal length %d", length);
  } else {
    guint16 units = tvb_get_ntohs(tvb, offset);
    proto_tree_add_uint(frame_tree, hf_flex_frame_ru_count, tvb, offset, 2, units);
  }
}

static void flex_frame_wu_usage_dissect(tvbuff_t* tvb,
                                        proto_tree* frame_tree,
                                        gint offset,
                                        gint length) {

  if (length != 2) {
    proto_tree_add_expert_format(frame_tree,
                                 NULL,
                                 &ef_warn_unknown_flex_len,
                                 tvb,
                                 offset,
                                 length,
                                 "Write unit illegal length %d", length);
  } else {
    guint16 units = tvb_get_ntohs(tvb, offset);
    proto_tree_add_uint(frame_tree, hf_flex_frame_wu_count, tvb, offset, 2, units);
  }
}

static void flex_frame_reorder_dissect(tvbuff_t* tvb,
                                       proto_tree* frame_tree,
                                       gint offset,
                                       gint length) {
  /* Expects no data, so just check len */
  if (length != 0) {
    proto_tree_add_expert_format(frame_tree,
                                 NULL,
                                 &ef_warn_unknown_flex_len,
                                 tvb,
                                 offset,
                                 length,
                                 "FlexFrame: Out Of Order with illegal length %d", length);
  }
}

static void flex_frame_durability_dissect(tvbuff_t* tvb,
                                          proto_tree* frame_tree,
                                          gint offset,
                                          gint length) {
  if (!(length == 1 || length == 3)) {
    proto_tree_add_expert_format(frame_tree,
                                 NULL,
                                 &ef_warn_unknown_flex_len,
                                 tvb,
                                 offset,
                                 length,
                                 "FlexFrame: Durability with illegal length %d", length);
    return;
  }
  proto_tree_add_item(frame_tree, hf_flex_frame_durability_req, tvb, offset, 1, ENC_BIG_ENDIAN);
}

static void flex_frame_dcp_stream_id_dissect(tvbuff_t* tvb,
                                             proto_tree* frame_tree,
                                             gint offset,
                                             gint length) {
  if (length != 2) {
    proto_tree_add_expert_format(frame_tree,
                                 NULL,
                                 &ef_warn_unknown_flex_len,
                                 tvb,
                                 offset,
                                 length,
                                 "FlexFrame: DCP Stream ID with illegal length %d", length);
  } else {
    guint16 sid = tvb_get_ntohs(tvb, offset);
    proto_tree_add_uint(frame_tree, hf_flex_frame_dcp_stream_id, tvb, offset, 2, sid);
  }
}

static void flex_frame_impersonate_dissect(tvbuff_t* tvb,
                                           proto_tree* frame_tree,
                                           gint offset,
                                           gint length) {
  proto_tree_add_item(frame_tree,
                      hf_flex_frame_impersonated_user,
                      tvb,
                      offset,
                      length,
                      ENC_UTF_8|ENC_STR_HEX);
}

static void flex_frame_preserve_ttl(tvbuff_t* tvb,
                                    proto_tree* frame_tree,
                                    gint offset,
                                    gint length) {
  /* Expects no data, so just check len */
  if (length != 0) {
    proto_tree_add_expert_format(frame_tree,
                                 NULL,
                                 &ef_warn_unknown_flex_len,
                                 tvb,
                                 offset,
                                 length,
                                 "FlexFrame: Preserve TTL with illegal length %d", length);
  }
}

typedef void (*flex_frame_by_id_dissect_fn)(tvbuff_t*,
                                            proto_tree*,
                                            gint,
                                            gint);

struct flex_frame_by_id_dissect {
  guint32 id;
  flex_frame_by_id_dissect_fn handler;
};

static const struct flex_frame_by_id_dissect flex_frame_response_dissect[] = {
  {FLEX_RESPONSE_ID_RX_TX_DURATION, &flex_frame_duration_dissect},
  {FLEX_RESPONSE_ID_RU_USAGE, &flex_frame_ru_usage_dissect},
  {FLEX_RESPONSE_ID_WU_USAGE, &flex_frame_wu_usage_dissect},
  {0, NULL }
};

static const struct flex_frame_by_id_dissect flex_frame_request_dissect[] = {
  { FLEX_REQUEST_ID_REORDER, &flex_frame_reorder_dissect},
  { FLEX_REQUEST_ID_DURABILITY, &flex_frame_durability_dissect},
  { FLEX_REQUEST_ID_DCP_STREAM_ID, &flex_frame_dcp_stream_id_dissect},
  { FLEX_REQUEST_ID_IMPERSONATE, &flex_frame_impersonate_dissect},
  { FLEX_REQUEST_ID_PRESERVE_TTL, &flex_frame_preserve_ttl},
  { 0, NULL }
};

/*
  Flexible Framing Extras:
  https://github.com/couchbase/kv_engine/blob/master/docs/BinaryProtocol.md
*/
static void dissect_flexible_framing_extras(tvbuff_t* tvb,
                                            packet_info* pinfo,
                                            proto_tree* tree,
                                            gint offset,
                                            guint8 flex_frame_extra_len,
                                            gboolean request) {

    /* select some request/response ID decoders */
  const struct flex_frame_by_id_dissect* id_dissectors = flex_frame_response_dissect;
  int info_id = hf_flex_frame_id_res;
  int info_id_esc = hf_flex_frame_id_res_esc;
  int info_len_id = hf_flex_frame_len;
  if (request) {
    id_dissectors = flex_frame_request_dissect;
    info_id = hf_flex_frame_id_req;
    info_id_esc = hf_flex_frame_id_req_esc;
  }

  /* This first item shows the entire extent of all frame extras.
     If we have multiple frames, we will add them in the iteration */
  proto_tree_add_uint(tree,
                      hf_flex_extras,
                      tvb,
                      offset,
                      flex_frame_extra_len,
                      flex_frame_extra_len);

  /* iterate until we've consumed the flex_frame_extra_len */
  gint bytes_remaining = flex_frame_extra_len;
  int frame_index = 0;

  while (bytes_remaining > 0) {

    /* FrameInfo starts with a 'tag' byte which is formed from 2 nibbles */
    guint8 tag_byte = tvb_get_guint8(tvb, offset);

    /* 0xff isn't defined yet in the spec as to what it should do */
    if (tag_byte == 0xFF) {
      proto_tree_add_expert_format(tree,
                                   pinfo,
                                   &ef_warn_unknown_flex_unsupported,
                                   tvb,
                                   offset,
                                   1,
                                   "Cannot decode 0xFF id/len byte");
      return;
    }

    /* extract the nibbles into u16, if the id/len nibbles are escapes, their
       true values come from following bytes and can be larger than u8 */
    guint16 id = tag_byte >> 4;
    guint16 len = tag_byte & 0x0F;

    int id_size = 1;
    /* Calculate the id/len and add to the tree */
    if (id == FLEX_ESCAPE) {
      id = id + tvb_get_guint8(tvb, offset + 1);
      id_size++;
      info_id = info_id_esc;
    }

    int len_size = 1;
    if (len == FLEX_ESCAPE) {
      len = len + tvb_get_guint8(tvb, offset + 1);
      len_size++;
      info_len_id = hf_flex_frame_len_esc;
    }

    /* add a new sub-tree for this FrameInfo */
    proto_item* flex_item = proto_tree_add_string_format(tree,
                                                         hf_flex_extras_n,
                                                         tvb,
                                                         offset,
                                                         1 + len,
                                                         NULL,
                                                         "Flexible Frame %d",
                                                         frame_index);

    proto_tree* frame_tree = proto_item_add_subtree(flex_item,
                                                    ett_flex_frame_extras);

    /* Now add the info under the sub-tree */
    proto_tree_add_uint(frame_tree, info_id, tvb, offset, id_size, id);
    proto_tree_add_uint(frame_tree, info_len_id, tvb, offset, len_size, len);

    /* this is broken if both len and id are escaped, but we've returned earlier
       for that case (with a warning) */
    offset = offset + 1 + (len_size - 1) + (id_size - 1);
    bytes_remaining = bytes_remaining - 1 - (len_size - 1) - (id_size - 1);;

    /* lookup a dissector function by id */
    int id_index = 0, found = 0;
    while (id_dissectors[id_index].handler) {
      if (id_dissectors[id_index].id == id) {
        id_dissectors[id_index].handler(tvb, frame_tree, offset, len);
        found = 1;
        break;
      }
      id_index++;
    }

    if (!found)  {
      proto_tree_add_expert_format(frame_tree,
                                   pinfo,
                                   &ef_warn_unknown_flex_id,
                                   tvb,
                                   offset,
                                   len,
                                   "FlexFrame: no dissector function for %d", id);
    }

    offset += len;
    bytes_remaining -= len;
    frame_index++;
  }
}

static gboolean
is_xerror(guint8 datatype, guint16 status)
{
  if ((datatype & DT_JSON) && status != STATUS_SUBDOC_MULTI_PATH_FAILURE) {
    return TRUE;
  }
  return FALSE;
}

/// The following section contains dissector functions for the various
/// server initiated push messages (and responses for them).
/// It's easier to understand the logic with a single function per opcode
/// than a long function with a ton of if/else statements

static void d_s_o_clustermap_change_notification_req(tvbuff_t *tvb,
                                                     packet_info *pinfo,
                                                     proto_tree *tree,
                                                     gint offset,
                                                     gint size) {
  if (size == 0) {
    // this is an error!
    expert_add_info_format(pinfo, tree, &ef_warn_illegal_value_length,
                           "Clustermap not present");
    return;
  }
  // The payload is the clustermap in JSON
  proto_tree_add_item(tree, hf_server_clustermap_value, tvb, offset, size,
                      ENC_ASCII | ENC_NA);
  tvbuff_t *json_tvb = tvb_new_subset_length(tvb, offset, size);
  call_dissector(json_handle, json_tvb, pinfo, tree);
}

static void d_s_o_authenticate_req(tvbuff_t *tvb,
                                   packet_info *pinfo,
                                   proto_tree *tree,
                                   gint offset,
                                   gint size) {
  if (size == 0) {
    // this is an error!
    expert_add_info_format(pinfo, tree, &ef_warn_illegal_value_length,
                           "Authentication payload not present");
    return;
  }
  // The payload is an JSON object with the authentication request
  proto_tree_add_item(tree, hf_server_authentication, tvb, offset, size,
                      ENC_ASCII | ENC_NA);
  tvbuff_t *json_tvb = tvb_new_subset_length(tvb, offset, size);
  call_dissector(json_handle, json_tvb, pinfo, tree);
}

static void d_s_o_active_external_users_req(tvbuff_t *tvb,
                                            packet_info *pinfo,
                                            proto_tree *tree,
                                            gint offset,
                                            gint size) {
  if (size == 0) {
    // this is an error!
    expert_add_info_format(pinfo, tree, &ef_warn_illegal_value_length,
                           "ActiveExternalUsers payload not present");
    return;
  }
  // The payload is an JSON array with the list of the users
  proto_tree_add_item(tree, hf_server_external_users, tvb, offset, size,
                      ENC_ASCII | ENC_NA);
  tvbuff_t *json_tvb = tvb_new_subset_length(tvb, offset, size);
  call_dissector(json_handle, json_tvb, pinfo, tree);
}

static void d_s_o_get_authorization_req(tvbuff_t *tvb,
                                        packet_info *pinfo,
                                        proto_tree *tree,
                                        gint offset,
                                        gint size) {
  if (size > 0) {
    // this is an error!
    proto_item *ti = proto_tree_add_item(tree, hf_value, tvb, offset, size,
                                         ENC_ASCII | ENC_NA);
    expert_add_info_format(pinfo, ti, &ef_warn_shall_not_have_value,
                           "GetAuthorization shall not have a value");
  }
}

/// Dissect the response to a server initiated push message which
/// don't require a response (the client may send it, but the server
/// will silently just ignore the response).
/// If sent the body should not contain value unless the status code
/// is an error and if so it shall be a JSON payload following the
/// standard error format.
static void d_s_o_server_ignored_response(tvbuff_t *tvb,
                                          packet_info *pinfo,
                                          proto_tree *tree,
                                          gint offset,
                                          gint size) {
  if (size == 0) {
    return;
  }
  proto_item *ti = proto_tree_add_item(tree, hf_value, tvb, offset, size,
                                       ENC_ASCII | ENC_NA);
  if (get_status(tvb) == STATUS_SUCCESS) {
    expert_add_info_format(pinfo, ti, &ef_warn_shall_not_have_value,
                           "Success should not carry value");
  } else {
    tvbuff_t *json_tvb = tvb_new_subset_length(tvb, offset, size);
    call_dissector(json_handle, json_tvb, pinfo, tree);
  }
}

static void d_s_o_authenticate_res(tvbuff_t *tvb ,
                                   packet_info *pinfo ,
                                   proto_tree *tree ,
                                   gint offset ,
                                   gint size ) {
  if (size == 0) {
    return;
  }

  // Payload is JSON (for success and if there is an error)
  proto_tree_add_item(tree, hf_server_authentication, tvb, offset, size,
                      ENC_ASCII | ENC_NA);
  tvbuff_t *json_tvb = tvb_new_subset_length(tvb, offset, size);
  call_dissector(json_handle, json_tvb, pinfo, tree);
}

static void d_s_o_get_authorization_res(tvbuff_t *tvb,
                                        packet_info *pinfo,
                                        proto_tree *tree,
                                        gint offset,
                                        gint size) {
  if (size == 0) {
    return;
  }

  // Payload is JSON (for success and if there is an error)
  proto_tree_add_item(tree, hf_server_get_authorization, tvb, offset, size,
                      ENC_ASCII | ENC_NA);
  tvbuff_t *json_tvb = tvb_new_subset_length(tvb, offset, size);
  call_dissector(json_handle, json_tvb, pinfo, tree);

}

/**
 * Does the opcode use the vbucket or not? (does it make any sense to
 * add the vbucket to the info)
 */
static bool opcode_use_vbucket(guint8 magic _U_, guint8 opcode) {
  switch (opcode) {
    case CLIENT_OPCODE_OBSERVE:
    case CLIENT_OPCODE_COLLECTIONS_GET_ID:
    case CLIENT_OPCODE_IFCONFIG:
    case CLIENT_OPCODE_SASL_LIST_MECHS:
    case CLIENT_OPCODE_SASL_AUTH:
    case CLIENT_OPCODE_SASL_STEP:
    case CLIENT_OPCODE_SHUTDOWN:
    case CLIENT_OPCODE_AUDIT_CONFIG_RELOAD:
    case CLIENT_OPCODE_AUDIT_PUT:
    case CLIENT_OPCODE_CONFIG_RELOAD:
    case CLIENT_OPCODE_CONFIG_VALIDATE:
    case CLIENT_OPCODE_IOCTL_SET:
    case CLIENT_OPCODE_IOCTL_GET:
    case CLIENT_OPCODE_HELLO:
    case CLIENT_OPCODE_VERBOSITY:
    case CLIENT_OPCODE_VERSION:
    case CLIENT_OPCODE_NOOP:
    case CLIENT_OPCODE_QUIT:
    case CLIENT_OPCODE_LIST_BUCKETS:
    case CLIENT_OPCODE_CREATE_BUCKET:
    case CLIENT_OPCODE_DELETE_BUCKET:
    case CLIENT_OPCODE_SELECT_BUCKET:
      return FALSE;

    default:
      return TRUE;
  }
}

/**
 * Each frame header consist of 24 bytes in two slightly different formats
 * (byte 6 and 7 is vbucket id in a request and status in a response).
 *
 * This method dissect the frame header. Please refer to
 * https://github.com/couchbase/kv_engine/blob/master/docs/BinaryProtocol.md#request-header
 * for the layout of the frame header.
 */
static void dissect_frame_header(tvbuff_t *tvb, packet_info *pinfo, proto_tree *couchbase_tree, proto_item *couchbase_item) {
  guint8 magic = get_magic(tvb);
  proto_item *ti = proto_tree_add_item(couchbase_tree, hf_magic, tvb, 0, 1, ENC_BIG_ENDIAN);
  if (try_val_to_str(magic, magic_vals) == NULL) {
    expert_add_info_format(pinfo, ti, &ef_warn_unknown_magic_byte, "Unknown magic byte: 0x%x", magic);
  }

  guint8 opcode = get_opcode(tvb);

  const gchar *opcode_name;
  if (is_server_magic(magic)) {
    ti = proto_tree_add_item(couchbase_tree, hf_server_opcode, tvb, 1, 1, ENC_BIG_ENDIAN);
    opcode_name = try_val_to_str_ext(opcode, &server_opcode_vals_ext);
  } else {
    ti = proto_tree_add_item(couchbase_tree, hf_opcode, tvb, 1, 1, ENC_BIG_ENDIAN);
    opcode_name = try_val_to_str_ext(opcode, &client_opcode_vals_ext);
  }

  if (opcode_name == NULL) {
    expert_add_info_format(pinfo, ti, &ef_warn_unknown_opcode, "Unknown opcode: 0x%x", opcode);
    opcode_name = "Unknown opcode";
  }
  proto_item_append_text(couchbase_item, ", %s %s, Opcode: 0x%x",
                         opcode_name,
                         val_to_str(magic, magic_vals, "Unknown magic (0x%x)"),
                         opcode);
  col_append_fstr(pinfo->cinfo, COL_INFO, "%s %s, Opcode: 0x%x",
                  opcode_name,
                  val_to_str(magic, magic_vals, "Unknown magic (0x%x)"),
                  opcode);

  /* Check for flex magic, which changes the header format */
  guint16 keylen;
  guint8 flex_frame_extras = get_flex_framing_extras_length(tvb);
  if (is_flex_encoded(magic)) {
    /* 2 separate bytes for the flex_extras and keylen */
    proto_tree_add_item(couchbase_tree, hf_flex_extras_length, tvb, 2, 1, ENC_BIG_ENDIAN);
    proto_tree_add_item(couchbase_tree, hf_flex_keylength, tvb, 3, 1, ENC_BIG_ENDIAN);
  } else {
    /* 2 bytes for the key */
    proto_tree_add_item(couchbase_tree, hf_keylength, tvb, 2, 2, ENC_BIG_ENDIAN);
  }
  keylen = get_key_length(tvb);

  guint8 extlen = get_extras_length(tvb);
  proto_tree_add_item(couchbase_tree, hf_extlength, tvb, 4, 1, ENC_BIG_ENDIAN);

  proto_tree_add_bitmask(couchbase_tree, tvb, 5, hf_datatype, ett_datatype, datatype_vals, ENC_BIG_ENDIAN);

  if (is_request_magic(magic)) {
    guint16 vbucket = tvb_get_ntohs(tvb, 6);
    proto_tree_add_item(couchbase_tree, hf_vbucket, tvb, 6, 2, ENC_BIG_ENDIAN);
    if (opcode_use_vbucket(magic, opcode)) {
      proto_item_append_text(couchbase_item, ", vb:%d", vbucket);
      col_append_fstr(pinfo->cinfo, COL_INFO, ", vb:%d", vbucket);
    }
  } else {
    /* This is a response or invalid magic... */
    guint16 status = get_status(tvb);
    ti = proto_tree_add_item(couchbase_tree, hf_status, tvb, 6, 2, ENC_BIG_ENDIAN);
    if (status != 0) {
      expert_add_info_format(pinfo, ti, &ef_warn_unknown_opcode, "%s: %s",
                             val_to_str_ext(opcode, &client_opcode_vals_ext, "Unknown opcode (0x%x)"),
                             val_to_str_ext(status, &status_vals_ext, "Status: 0x%x"));
    }
  }

  guint32 bodylen = get_body_length(tvb);
  guint32 value_len = bodylen - extlen - keylen - flex_frame_extras;
  ti = proto_tree_add_uint(couchbase_tree, hf_value_length, tvb, 8, 0, value_len);
  proto_item_set_generated(ti);

  proto_tree_add_item(couchbase_tree, hf_total_bodylength, tvb, 8, 4, ENC_BIG_ENDIAN);

  /*
   * use little endian (network) encoding for the opaque as this is an opaque
   * field the client could use for whatever they want
   */
  proto_tree_add_item(couchbase_tree, hf_opaque, tvb, 12, 4, ENC_LITTLE_ENDIAN);

  // Finally we've got the CAS (which observe has a special use for)
  if (opcode == CLIENT_OPCODE_OBSERVE) {
    proto_tree_add_item(couchbase_tree, hf_ttp, tvb, 16, 4, ENC_BIG_ENDIAN);
    proto_tree_add_item(couchbase_tree, hf_ttr, tvb, 20, 4, ENC_BIG_ENDIAN);
  } else {
    proto_tree_add_item(couchbase_tree, hf_cas, tvb, 16, 8, ENC_BIG_ENDIAN);
  }
}

/**
 * Dissect the flexible frame info's encoded in the packet
 */
static void dissect_frame_flex_info_section(tvbuff_t *tvb,
                                            packet_info *pinfo,
                                            proto_tree *tree,
                                            gint offset,
                                            guint8 size,
                                            guint8 magic) {
  if (size == 0) {
    return;
  }

  switch (magic) {
    case MAGIC_SERVER_RESPONSE:
    case MAGIC_SERVER_REQUEST:
      // None of the server initiated messages use flex frame encoding!
      proto_tree_add_item(tree, hf_flex_extras, tvb, offset, size, ENC_UTF_8|ENC_STR_HEX);
      proto_tree_add_expert_format(tree,
                                   pinfo,
                                   &ef_warn_unknown_flex_unsupported,
                                   tvb,
                                   offset,
                                   size,
                                   "Server initiated messages don't use flex framing");
      break;

    case MAGIC_CLIENT_REQUEST_FLEX:
    case MAGIC_CLIENT_RESPONSE_FLEX:
      dissect_flexible_framing_extras(tvb,
                                      pinfo,
                                      tree,
                                      offset,
                                      size,
                                      is_request_magic(magic));
      break;
    default:
      proto_tree_add_item(tree, hf_flex_extras, tvb, offset, size, ENC_UTF_8|ENC_STR_HEX);
      proto_tree_add_expert_format(tree,
                                   pinfo,
                                   &ef_warn_unknown_flex_unsupported,
                                   tvb,
                                   offset,
                                   size,
                                   "According to the magic we should not have flex encoding");
  }
}

/**
 * Dissect the extras section in the frame
 */
static void dissect_frame_extras(tvbuff_t *tvb,
                                 packet_info *pinfo,
                                 proto_tree *tree,
                                 gint offset,
                                 guint8 size,
                                 guint8 magic,
                                 guint8 opcode,
                                 guint16 *subdoc_path_len) {
  switch (magic) {
    case MAGIC_SERVER_RESPONSE:
      dissect_server_response_extras(tvb, pinfo, tree, offset, size, opcode);
      break;
    case MAGIC_SERVER_REQUEST:
      dissect_server_request_extras(tvb, pinfo, tree, offset, size, opcode);
      break;
    case MAGIC_CLIENT_REQUEST_FLEX:
    case MAGIC_CLIENT_RESPONSE_FLEX:
    case MAGIC_CLIENT_REQUEST:
    case MAGIC_CLIENT_RESPONSE:
      dissect_client_extras(tvb, pinfo, tree, offset, size,
                            opcode, is_request_magic(magic), subdoc_path_len);
      break;
    default:
      proto_tree_add_item(tree, hf_extras, tvb, offset, size, ENC_UTF_8|ENC_STR_HEX);
      proto_tree_add_expert_format(tree,
                                   pinfo,
                                   &ef_warn_unknown_extras,
                                   tvb,
                                   offset,
                                   size,
                                   "Invalid magic so we can't interpret extras");
  }
}

/**
 * Dissect the key section in the frame
 */
static void dissect_frame_key(tvbuff_t *tvb,
                              packet_info *pinfo,
                              proto_tree *tree,
                              gint offset,
                              guint16 size,
                              guint8 magic,
                              guint8 opcode) {
  if (is_server_magic(magic)) {
    dissect_server_key(tvb, pinfo, tree, offset, size, opcode,
                       is_request_magic(magic));
  } else {
    dissect_client_key(tvb, pinfo, tree, offset, size, opcode,
                       is_request_magic(magic));
  }
}

static void dissect_client_value(tvbuff_t *tvb,
                                 packet_info *pinfo,
                                 proto_tree *tree,
                                 gint offset,
                                 guint32 size,
                                 guint8 magic,
                                 guint8 opcode,
                                 guint16 subdoc_path_len) {
  guint8 datatype = get_datatype(tvb);
  if (is_request_magic(magic)) {
    dissect_value(tvb, pinfo, tree, offset, size, subdoc_path_len, opcode, true, datatype);
  } else {
    guint16 status = get_status(tvb);
    if (status == 0) {
      dissect_value(tvb, pinfo, tree, offset, size, subdoc_path_len, opcode, false, datatype);
    } else if (size) {
      proto_tree_add_item(tree, hf_value, tvb, offset, size, ENC_ASCII | ENC_NA);
      if (status == STATUS_NOT_MY_VBUCKET || is_xerror(datatype, status)) {
        tvbuff_t *json_tvb;
        json_tvb = tvb_new_subset_length(tvb, offset, size);
        call_dissector(json_handle, json_tvb, pinfo, tree);
      } else if (opcode == CLIENT_OPCODE_SUBDOC_MULTI_LOOKUP) {
        dissect_multipath_lookup_response(tvb, pinfo, tree, offset, size);
      } else if (opcode == CLIENT_OPCODE_SUBDOC_MULTI_MUTATION) {
        dissect_multipath_mutation_response(tvb, pinfo, tree, offset, size);
      }
      col_append_fstr(pinfo->cinfo, COL_INFO, ", %s",
                      val_to_str_ext(status, &status_vals_ext,
                                     "Unknown status: 0x%x"));
    } else {
      /* Newer opcodes do not include a value in non-SUCCESS responses. */
      proto_tree *ti;
      switch (opcode) {
        case CLIENT_OPCODE_SUBDOC_GET:
        case CLIENT_OPCODE_SUBDOC_EXISTS:
        case CLIENT_OPCODE_SUBDOC_DICT_ADD:
        case CLIENT_OPCODE_SUBDOC_DICT_UPSERT:
        case CLIENT_OPCODE_SUBDOC_DELETE:
        case CLIENT_OPCODE_SUBDOC_REPLACE:
        case CLIENT_OPCODE_SUBDOC_ARRAY_PUSH_LAST:
        case CLIENT_OPCODE_SUBDOC_ARRAY_PUSH_FIRST:
        case CLIENT_OPCODE_SUBDOC_ARRAY_INSERT:
        case CLIENT_OPCODE_SUBDOC_ARRAY_ADD_UNIQUE:
        case CLIENT_OPCODE_SUBDOC_COUNTER:
        case CLIENT_OPCODE_SUBDOC_MULTI_LOOKUP:
        case CLIENT_OPCODE_SUBDOC_MULTI_MUTATION:
          break;

        default:
          ti = proto_tree_add_item(tree, hf_value, tvb, offset, 0,
                                   ENC_ASCII | ENC_NA);
          expert_add_info_format(pinfo, ti, &ei_value_missing,
                                 "%s with status %s (0x%x) must have Value",
                                 val_to_str_ext(opcode,
                                                &client_opcode_vals_ext,
                                                "Opcode 0x%x"),
                                 val_to_str_ext(status,
                                                &status_vals_ext,
                                                "Unknown"),
                                 status);
      }
    }
  }
}

static void dissect_server_request_value(tvbuff_t *tvb,
                                         packet_info *pinfo,
                                         proto_tree *tree,
                                         gint offset,
                                         gint size) {
  switch (get_opcode(tvb)) {
    case SERVER_OPCODE_CLUSTERMAP_CHANGE_NOTIFICATION:
      d_s_o_clustermap_change_notification_req(tvb, pinfo, tree, offset, size);
      return;
    case SERVER_OPCODE_AUTHENTICATE:
      d_s_o_authenticate_req(tvb, pinfo, tree, offset, size);
      return;
    case SERVER_OPCODE_ACTIVE_EXTERNAL_USERS:
      d_s_o_active_external_users_req(tvb, pinfo, tree, offset, size);
      return;
    case SERVER_OPCODE_GET_AUTHORIZATION:
      d_s_o_get_authorization_req(tvb, pinfo, tree, offset, size);
      return;
    default:
      // Unknown packet type.. just dump the data
      if (size > 0) {
        proto_tree_add_item(tree, hf_value, tvb, offset, size,
                            ENC_ASCII | ENC_NA);
      }
      return;
  }
}

static void dissect_server_response_value(tvbuff_t *tvb,
                                         packet_info *pinfo,
                                         proto_tree *tree,
                                         gint offset,
                                         gint size) {
  col_append_fstr(pinfo->cinfo, COL_INFO, ", %s",
                  val_to_str_ext(get_status(tvb), &status_vals_ext,
                                 "Unknown status: 0x%x"));

  switch (get_opcode(tvb)) {
    case SERVER_OPCODE_CLUSTERMAP_CHANGE_NOTIFICATION:
      d_s_o_server_ignored_response(tvb, pinfo, tree, offset, size);
      return;
    case SERVER_OPCODE_AUTHENTICATE:
      d_s_o_authenticate_res(tvb, pinfo, tree, offset, size);
      return;
    case SERVER_OPCODE_ACTIVE_EXTERNAL_USERS:
      d_s_o_server_ignored_response(tvb, pinfo, tree, offset, size);
      return;
    case SERVER_OPCODE_GET_AUTHORIZATION:
      d_s_o_get_authorization_res(tvb, pinfo, tree, offset, size);
      return;
    default:
      // Unknown packet type.. just dump the data
      if (size > 0) {
        proto_tree_add_item(tree, hf_value, tvb, offset, size,
                            ENC_ASCII | ENC_NA);
      }
      return;
  }
}

/**
 * Dissect the value section in the frame
 */
static void dissect_frame_value(tvbuff_t *tvb,
                                packet_info *pinfo,
                                proto_tree *tree,
                                gint offset,
                                guint32 size,
                                guint8 magic,
                                guint8 opcode,
                                guint16 subdoc_path_len) {
  if (size > G_MAXINT32) {
    // The packet size isn't supported
  }

  switch (magic) {
    case MAGIC_CLIENT_REQUEST:
    case MAGIC_CLIENT_RESPONSE:
    case MAGIC_CLIENT_REQUEST_FLEX:
    case MAGIC_CLIENT_RESPONSE_FLEX:
      dissect_client_value(tvb, pinfo, tree, offset, size, magic, opcode, subdoc_path_len);
      return;
    case MAGIC_SERVER_REQUEST:
      dissect_server_request_value(tvb, pinfo, tree, offset, (gint)size);
      return;
    case MAGIC_SERVER_RESPONSE:
      dissect_server_response_value(tvb, pinfo, tree, offset, (gint)size);
      return;
    default:
      // Unknown magic... just dump the data
      if (size > 0) {
        proto_tree_add_item(tree, hf_value, tvb, offset, (gint)size, ENC_ASCII | ENC_NA);
      }
      return;
  }
}

/**
 * Each frame in the protocol consists of a 24 byte header, followed by
 * a variable number of sections (all of the sizes is located in the
 * first 24 byte header):
 *
 * |---------------------------------------|
 * |  Fixed 24 byte frame header           |
 * |---------------------------------------|
 * |  n bytes flex frame info              |
 * |---------------------------------------|
 * |  n bytes extras                       |
 * |---------------------------------------|
 * |  n bytes key                          |
 * |---------------------------------------|
 * |  n bytes value                        |
 * |---------------------------------------|
 *
 * Call each function responsible for printing the segment
 */
static int
dissect_couchbase(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
  col_set_str(pinfo->cinfo, COL_PROTOCOL, PSNAME);
  col_clear(pinfo->cinfo, COL_INFO);

  proto_item *couchbase_item = proto_tree_add_item(tree, proto_couchbase, tvb, 0, -1, ENC_NA);
  proto_tree *couchbase_tree = proto_item_add_subtree(couchbase_item, ett_couchbase);

  dissect_frame_header(tvb, pinfo, couchbase_tree, couchbase_item);
  guint8 magic = get_magic(tvb);
  gint offset = 24;

  guint8 flex_frame_extra_len = get_flex_framing_extras_length(tvb);
  guint8 opcode = get_opcode(tvb);
  guint8 extras_length = get_extras_length(tvb);
  guint16 key_length = get_key_length(tvb);
  guint32 body_length = get_body_length(tvb);
  guint32 value_len = body_length - key_length - extras_length - flex_frame_extra_len;

  dissect_frame_flex_info_section(tvb, pinfo, couchbase_tree, offset, flex_frame_extra_len, magic);
  offset += flex_frame_extra_len;

  guint16 subdoc_path_len = 0;
  // Dissect the extras section
  dissect_frame_extras(tvb, pinfo, couchbase_tree, offset, extras_length, magic, opcode, &subdoc_path_len);
  offset += extras_length;

  // dissect the key
  dissect_frame_key(tvb, pinfo, couchbase_tree, offset, key_length, magic, opcode);
  offset += key_length;

  dissect_frame_value(tvb, pinfo, couchbase_tree, offset, value_len, magic, opcode, subdoc_path_len);
  return tvb_reported_length(tvb);
}

static guint
get_couchbase_pdu_length(packet_info *pinfo _U_, tvbuff_t *tvb, int offset,
                         void *data _U_) {
  // See https://github.com/couchbase/kv_engine/blob/master/docs/BinaryProtocol.md#packet-structure
  // for a description of each packet.
  // The "length" field is located at offset 8 within the frame and does
  // not include the fixed header.
  return tvb_get_ntohl(tvb, offset + 8) + COUCHBASE_HEADER_LEN;
}

/* Dissect the couchbase packet */
static int
dissect_couchbase_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
                      void *data) {
  if (try_val_to_str(tvb_get_guint8(tvb, 0), magic_vals) == NULL) {
    // Magic isn't one of the know magics used by the Couchbase dissector
    return 0;
  }

  tcp_dissect_pdus(tvb, pinfo, tree, couchbase_desegment_body,
                   COUCHBASE_HEADER_LEN,
                   get_couchbase_pdu_length, dissect_couchbase, data);
  return tvb_captured_length(tvb);
}


/* Registration functions; register couchbase protocol,
 * its configuration options and also register the tcp dissectors.
 */
void
proto_register_couchbase(void)
{
  static hf_register_info hf[] = {
    { &hf_magic, { "Magic", "couchbase.magic", FT_UINT8, BASE_HEX, VALS(magic_vals), 0x0, "Magic number", HFILL } },
    { &hf_opcode, { "Opcode", "couchbase.opcode", FT_UINT8, BASE_HEX|BASE_EXT_STRING, &client_opcode_vals_ext, 0x0, "Command code", HFILL } },
    { &hf_server_opcode, { "Server Opcode", "couchbase.server.opcode", FT_UINT8, BASE_HEX|BASE_EXT_STRING, &server_opcode_vals_ext, 0x0, "Command code", HFILL } },
    { &hf_extlength, { "Extras Length", "couchbase.extras.length", FT_UINT8, BASE_DEC, NULL, 0x0, "Length in bytes of the command extras", HFILL } },
    { &hf_keylength, { "Key Length", "couchbase.key.length", FT_UINT16, BASE_DEC, NULL, 0x0, "Length in bytes of the text key that follows the command extras", HFILL } },
    { &hf_value_length, { "Value Length", "couchbase.value.length", FT_UINT32, BASE_DEC, NULL, 0x0, "Length in bytes of the value that follows the key", HFILL } },
    { &hf_datatype, { "Data Type", "couchbase.datatype", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL} },
    { &hf_datatype_json, { "JSON", "couchbase.datatype.json", FT_BOOLEAN, 8, TFS(&tfs_set_notset), DT_JSON, "JSON datatype", HFILL} },
    { &hf_datatype_snappy, { "Snappy", "couchbase.datatype.snappy", FT_BOOLEAN, 8, TFS(&tfs_set_notset), DT_SNAPPY, "Snappy Compressed", HFILL} },
    { &hf_datatype_xattr, { "XATTR", "couchbase.datatype.xattr", FT_BOOLEAN, 8, TFS(&tfs_set_notset), DT_XATTR, "Xattrs included", HFILL} },
    { &hf_vbucket, { "VBucket", "couchbase.vbucket", FT_UINT16, BASE_DEC_HEX, NULL, 0x0, "VBucket ID", HFILL } },
    { &hf_status, { "Status", "couchbase.status", FT_UINT16, BASE_HEX|BASE_EXT_STRING, &status_vals_ext, 0x0, "Status of the response", HFILL } },
    { &hf_total_bodylength, { "Total Body Length", "couchbase.total_bodylength", FT_UINT32, BASE_DEC, NULL, 0x0, "Length in bytes of extra + key + value", HFILL } },
    { &hf_opaque, { "Opaque", "couchbase.opaque", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
    { &hf_cas, { "CAS", "couchbase.cas", FT_UINT64, BASE_HEX, NULL, 0x0, "Data version check", HFILL } },
    { &hf_ttp, { "Time to Persist", "couchbase.ttp", FT_UINT32, BASE_DEC, NULL, 0x0, "Approximate time needed to persist the key (milliseconds)", HFILL } },
    { &hf_ttr, { "Time to Replicate", "couchbase.ttr", FT_UINT32, BASE_DEC, NULL, 0x0, "Approximate time needed to replicate the key (milliseconds)", HFILL } },

    { &hf_collection_key_id, { "Collection ID", "couchbase.key.collection_id", FT_UINT32, BASE_HEX, NULL, 0x0, "If this a collection stream, this is the collection-ID", HFILL } },
    { &hf_collection_key_logical, { "Collection Logical Key", "couchbase.key.logical_key", FT_STRING, BASE_NONE, NULL, 0x0, "If this a collection stream, this is the key in the collection", HFILL } },
    { &hf_collection_manifest_id, { "Collections Manifest ID", "couchbase.key.collection_manifest_id", FT_UINT64, BASE_HEX, NULL, 0x0, "The collections manifest id", HFILL } },

    { &hf_flex_keylength, { "Key Length", "couchbase.key.length", FT_UINT8, BASE_DEC, NULL, 0x0, "Length in bytes of the text key that follows the command extras", HFILL } },
    { &hf_flex_extras_length, { "Flexible Framing Extras Length", "couchbase.flex_extras", FT_UINT8, BASE_DEC, NULL, 0x0, "Length in bytes of the flexible framing extras that follows the response header", HFILL } },
    { &hf_flex_extras, {"Flexible Framing Extras", "couchbase.flex_frame_extras", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_flex_extras_n, {"Flexible Framing Extras", "couchbase.flex_frame_extras.string", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },

    { &hf_flex_frame_id_byte0, {"Flexible Frame Byte0", "couchbase.flex_frame.byte0", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },

    { &hf_flex_frame_id_req, {"Flexible Frame ID (request)", "couchbase.flex_frame.frame.id", FT_UINT8, BASE_DEC, VALS(flex_frame_request_ids), 0x0, NULL, HFILL } },
    { &hf_flex_frame_id_res, {"Flexible Frame ID (response)", "couchbase.flex_frame.frame.id", FT_UINT8, BASE_DEC, VALS(flex_frame_response_ids), 0x0, NULL, HFILL } },
    { &hf_flex_frame_id_req_esc, {"Flexible Frame ID esc (request)", "couchbase.flex_frame.frame.id", FT_UINT16, BASE_DEC, VALS(flex_frame_request_ids), 0x0, NULL, HFILL } },
    { &hf_flex_frame_id_res_esc, {"Flexible Frame ID esc (response)", "couchbase.flex_frame.frame.id", FT_UINT16, BASE_DEC, VALS(flex_frame_response_ids), 0x0, NULL, HFILL } },


    { &hf_flex_frame_len, {"Flexible Frame Len", "couchbase.flex_frame.frame.len", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_flex_frame_len_esc, {"Flexible Frame Len (esc)", "couchbase.flex_frame.frame.len", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },

    { &hf_flex_frame_tracing_duration, {"Server Recv->Send duration", "couchbase.flex_frame.frame.duration", FT_DOUBLE, BASE_NONE|BASE_UNIT_STRING, &units_microseconds, 0, NULL, HFILL } },
    { &hf_flex_frame_ru_count, {"Read unit count", "couchbase.flex_frame.frame.ru_count", FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL } },
    { &hf_flex_frame_wu_count, {"Write unit count", "couchbase.flex_frame.frame.wu_count", FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL } },
    { &hf_flex_frame_durability_req, {"Durability Requirement", "couchbase.flex_frame.frame.durability_req", FT_UINT8, BASE_DEC, VALS(flex_frame_durability_req), 0, NULL, HFILL } },
    { &hf_flex_frame_dcp_stream_id, {"DCP Stream Identifier", "couchbase.flex_frame.frame.dcp_stream_id", FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL } },
    { &hf_flex_frame_impersonated_user, {"Impersonated User", "couchbase.flex_frame.frame.impersonated_user", FT_STRING, BASE_NONE, NULL, 0, NULL, HFILL } },

    { &hf_extras, { "Extras", "couchbase.extras", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_flags, { "Flags", "couchbase.extras.flags", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_flags_backfill, { "Backfill Age", "couchbase.extras.flags.backfill", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0001, NULL, HFILL } },
    { &hf_extras_flags_dump, { "Dump", "couchbase.extras.flags.dump", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0002, NULL, HFILL } },
    { &hf_extras_flags_list_vbuckets, { "List VBuckets", "couchbase.extras.flags.list_vbuckets", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0004, NULL, HFILL } },
    { &hf_extras_flags_takeover_vbuckets, { "Takeover VBuckets", "couchbase.extras.flags.takeover_vbuckets", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0008, NULL, HFILL } },
    { &hf_extras_flags_support_ack, { "Support ACK", "couchbase.extras.flags.support_ack", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0010, NULL, HFILL } },
    { &hf_extras_flags_request_keys_only, { "Request Keys Only", "couchbase.extras.flags.request_keys_only", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0020, NULL, HFILL } },
    { &hf_extras_flags_checkpoint, { "Checkpoint", "couchbase.extras.flags.checkpoint", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0040, NULL, HFILL } },

    /* Sub-document */
    { &hf_subdoc_flags, { "Subdoc flags", "couchbase.extras.subdoc.flags", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL} },
    { &hf_subdoc_flags_mkdirp, { "MKDIR_P", "couchbase.extras.subdoc.flags.mkdir_p", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x01, "Create non-existent intermediate paths", HFILL} },
    { &hf_subdoc_flags_xattrpath, { "XATTR_PATH", "couchbase.extras.subdoc.flags.xattr_path", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x04, "If set path refers to extended attribute (XATTR)", HFILL} },
    { &hf_subdoc_flags_expandmacros, { "EXPAND_MACROS", "couchbase.extras.subdoc.flags.expand_macros", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x10, "Expand macro values inside XATTRs", HFILL} },
    { &hf_subdoc_flags_reserved, {"Reserved fields", "couchbase.extras.subdoc.flags.reserved", FT_UINT8, BASE_HEX, NULL, 0xEA, "A reserved field", HFILL} },
    { &hf_subdoc_doc_flags, { "Subdoc Doc flags", "couchbase.extras.subdoc.doc_flags", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL} },
    { &hf_subdoc_doc_flags_mkdoc, { "MKDOC", "couchbase.extras.subdoc.doc_flags.mkdoc", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x01, "Create document if it does not exist, implies mkdir_p", HFILL} },
    { &hf_subdoc_doc_flags_add, { "ADD", "couchbase.extras.subdoc.doc_flags.add", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x02, "Fail if doc already exists", HFILL} },
    { &hf_subdoc_doc_flags_accessdeleted, { "ACCESS_DELETED", "couchbase.extras.subdoc.doc_flags.access_deleted", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x04, "Allow access to XATTRs for deleted documents", HFILL} },
    { &hf_subdoc_doc_flags_createasdeleted, { "CREATE_AS_DELETED", "couchbase.extras.subdoc.doc_flags.create_as_deleted", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x08, "If the document does not exist then create it in the Deleted state, instead of the normal Alive state", HFILL} },
    { &hf_subdoc_doc_flags_revivedocument, { "REVIVE_DOCUMENT", "couchbase.extras.subdoc.doc_flags.revive_document", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x10, "If the document exists in the Deleted state, revive it to the normal Alive state", HFILL} },
    { &hf_subdoc_doc_flags_replicaread, { "REPLICA_READ", "couchbase.extras.subdoc.doc_flags.replica_read", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x20, "Operate on a replica vbucket instead of an active one", HFILL} },
    { &hf_subdoc_doc_flags_reserved, {"Reserved fields", "couchbase.extras.subdoc.doc_flags.reserved", FT_UINT8, BASE_HEX, NULL, 0xC0, "A reserved field", HFILL} },
    { &hf_extras_pathlen, { "Path Length", "couchbase.extras.pathlen", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },

    /* DCP flags */
    { &hf_extras_flags_dcp_connection_type, {"Connection Type", "couchbase.extras.flags.dcp_connection_type", FT_UINT32, BASE_HEX, VALS(dcp_connection_type_vals), 0x00000003, NULL, HFILL } },
    { &hf_extras_flags_dcp_add_stream_takeover, {"Take Over", "couchbase.extras.flags.dcp_add_stream_takeover", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0001, NULL, HFILL } },
    { &hf_extras_flags_dcp_add_stream_diskonly, {"Disk Only", "couchbase.extras.flags.dcp_add_stream_diskonly", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0002, NULL, HFILL } },
    { &hf_extras_flags_dcp_add_stream_latest, {"Latest", "couchbase.extras.flags.dcp_add_stream_latest", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0004, NULL, HFILL } },
    { &hf_extras_flags_dcp_snapshot_marker_memory, {"Memory", "couchbase.extras.flags.dcp_snapshot_marker_memory", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0001, NULL, HFILL } },
    { &hf_extras_flags_dcp_snapshot_marker_disk, {"Disk", "couchbase.extras.flags.dcp_snapshot_marker_disk", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0002, NULL, HFILL } },
    { &hf_extras_flags_dcp_snapshot_marker_chk, {"Chk", "couchbase.extras.flags.dcp_snapshot_marker_chk", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0004, NULL, HFILL } },
    { &hf_extras_flags_dcp_snapshot_marker_ack, {"Ack", "couchbase.extras.flags.dcp_snapshot_marker_ack", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0008, NULL, HFILL } },
    { &hf_extras_flags_dcp_snapshot_marker_history, {"History", "couchbase.extras.flags.dcp_snapshot_marker_history", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0010, NULL, HFILL } },
    { &hf_extras_flags_dcp_snapshot_marker_may_contain_dups, {"May Contain Duplicates", "couchbase.extras.flags.dcp_snapshot_marker_may_contain_duplicates", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0020, NULL, HFILL } },
    { &hf_extras_flags_dcp_include_xattrs, {"Include XATTRs", "couchbase.extras.flags.dcp_include_xattrs", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0004, "Indicates the server should include documents XATTRs", HFILL} },
    { &hf_extras_flags_dcp_no_value, {"No Value", "couchbase.extras.flags.dcp_no_value", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0008, "Indicates the server should strip off values", HFILL} },
    { &hf_extras_flags_dcp_collections, {"Enable Collections", "couchbase.extras.flags.dcp_collections", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0010, "Indicates the server should stream collections", HFILL} },
    { &hf_extras_flags_dcp_include_delete_times, {"Include Delete Times", "couchbase.extras.flags.dcp_include_delete_times", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0020, "Indicates the server should include delete timestamps", HFILL} },
    { &hf_extras_flags_dcp_oso_snapshot_begin, {"OSO Begin", "couchbase.extras.flags.dcp_oso_snapshot_begin", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0001, "The start of an OSO snapshot", HFILL} },
    { &hf_extras_flags_dcp_oso_snapshot_end, {"OSO End", "couchbase.extras.flags.dcp_oso_snapshot_end", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0002, "The end of an OSO snapshot", HFILL} },

    { &hf_extras_seqno, { "Sequence number", "couchbase.extras.seqno", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_mutation_seqno, { "Mutation Sequence Number", "couchbase.extras.mutation_seqno", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_opaque, { "Opaque (vBucket identifier)", "couchbase.extras.opaque", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_reserved, { "Reserved", "couchbase.extras.reserved", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_start_seqno, { "Start Sequence Number", "couchbase.extras.start_seqno", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_end_seqno, { "End Sequence Number", "couchbase.extras.end_seqno", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_high_completed_seqno, { "High Completed Sequence Number", "couchbase.extras.high_completed_seqno", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_max_visible_seqno, { "Max Visible Seqno", "couchbase.extras.max_visible_seqno", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_timestamp, { "PiTR timestamp", "couchbase.extras.timestamp", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_marker_version, { "Snapshot Marker Version", "couchbase.extras.marker_version", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_vbucket_uuid, { "VBucket UUID", "couchbase.extras.vbucket_uuid", FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_snap_start_seqno, { "Snapshot Start Sequence Number", "couchbase.extras.snap_start_seqno", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_snap_end_seqno, { "Snapshot End Sequence Number", "couchbase.extras.snap_end_seqno", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_by_seqno, { "by_seqno", "couchbase.extras.by_seqno", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_prepared_seqno, { "by_seqno (prepared)", "couchbase.extras.by_seqno_prepared", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_commit_seqno, { "by_seqno (commit)", "couchbase.extras.by_seqno_commit", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_abort_seqno, { "by_seqno (abort)", "couchbase.extras.by_seqno_abort", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_rev_seqno, { "rev_seqno", "couchbase.extras.rev_seqno", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_lock_time, { "lock_time", "couchbase.extras.lock_time", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_nmeta, { "nmeta", "couchbase.extras.nmeta", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_nru, { "nru", "couchbase.extras.nru", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_deleted, { "deleted", "couchbase.extras.deleted", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_bytes_to_ack, { "bytes_to_ack", "couchbase.extras.bytes_to_ack", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_delete_time, { "delete_time", "couchbase.extras.delete_time", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_delete_unused, { "unused", "couchbase.extras.delete_unused", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_system_event_id, { "system_event_id", "couchbase.extras.system_event_id", FT_UINT32, BASE_DEC, VALS(dcp_system_event_id_vals), 0x0, NULL, HFILL } },
    { &hf_extras_system_event_version, { "system_event_version", "couchbase.extras.system_event_version", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_dcp_oso_snapshot_flags, { "OSO snapshot flags", "couchbase.extras.dcp_oso_snapshot_flags", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },

    { &hf_failover_log, { "Failover Log", "couchbase.dcp.failover_log", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
    { &hf_failover_log_size, { "Size", "couchbase.dcp.failover_log.size", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_failover_log_vbucket_uuid, { "VBucket UUID", "couchbase.dcp.failover_log.vbucket_uuid", FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL } },
    { &hf_failover_log_vbucket_seqno, { "Sequence Number", "couchbase.dcp.failover_log.seqno", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },

    { &hf_vbucket_states, { "VBucket States", "couchbase.vbucket_states", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
    { &hf_vbucket_states_state, { "State", "couchbase.vbucket_states.state", FT_UINT32, BASE_HEX, VALS(vbucket_states_vals), 0x0, NULL, HFILL } },
    { &hf_vbucket_states_size, { "Size", "couchbase.vbucket_states.size", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_vbucket_states_id, { "VBucket", "couchbase.vbucket_states.id", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_vbucket_states_seqno, { "Sequence Number", "couchbase.vbucket_states.seqno", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },

    { &hf_extras_expiration, { "Expiration", "couchbase.extras.expiration", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_delta, { "Amount to Add", "couchbase.extras.delta", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_initial, { "Initial Value", "couchbase.extras.initial", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_extras_unknown, { "Unknown", "couchbase.extras.unknown", FT_BYTES, BASE_NONE, NULL, 0x0, "Unknown Extras", HFILL } },
    { &hf_key, { "Key", "couchbase.key", FT_STRING, BASE_NONE, NULL, 0x0, "If this is a collection stream, the key is formed of a leb128 prefix and then the key", HFILL } },
    { &hf_path, { "Path", "couchbase.path", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
    { &hf_value, { "Value", "couchbase.value", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
    { &hf_uint64_response, { "Response", "couchbase.extras.response", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_observe, { "Observe", "couchbase.observe", FT_STRING, BASE_NONE, NULL, 0x0, "The observe properties", HFILL } },
    { &hf_observe_key, { "Key", "couchbase.observe.key", FT_STRING, BASE_NONE, NULL, 0x0, "The observable key", HFILL } },
    { &hf_observe_keylength, { "Key Length", "couchbase.observe.keylength", FT_UINT16, BASE_DEC, NULL, 0x0, "The length of the observable key", HFILL } },
    { &hf_observe_vbucket, { "VBucket", "couchbase.observe.vbucket", FT_UINT16, BASE_HEX, NULL, 0x0, "VBucket of the observable key", HFILL } },
    { &hf_observe_status, { "Status", "couchbase.observe.status", FT_UINT8, BASE_HEX, NULL, 0x0, "Status of the observable key", HFILL } },
    { &hf_observe_cas, { "CAS", "couchbase.observe.cas", FT_UINT64, BASE_HEX, NULL,                                                              0x0, "CAS value of the observable key",                                 HFILL } },
    { &hf_observe_vbucket_uuid, { "VBucket UUID", "couchbase.observe.vbucket_uuid", FT_UINT64, BASE_HEX, NULL,                                   0x0, NULL,                                                              HFILL } },
    { &hf_observe_last_persisted_seqno, { "Last persisted sequence number", "couchbase.observe.last_persisted_seqno", FT_UINT64, BASE_DEC, NULL, 0x0, NULL,                                                              HFILL } },
    { &hf_observe_current_seqno, { "Current sequence number", "couchbase.observe.current_seqno", FT_UINT64, BASE_DEC, NULL,                      0x0, NULL,                                                              HFILL } },
    { &hf_observe_old_vbucket_uuid, { "Old VBucket UUID", "couchbase.observe.old_vbucket_uuid", FT_UINT64, BASE_HEX, NULL,                       0x0, NULL,                                                              HFILL } },
    { &hf_observe_last_received_seqno, { "Last received sequence number", "couchbase.observe.last_received_seqno", FT_UINT64, BASE_DEC, NULL,    0x0, NULL,                                                              HFILL } },
    { &hf_observe_failed_over, { "Failed over", "couchbase.observe.failed_over", FT_UINT8, BASE_DEC, NULL,                                       0x0, NULL,                                                              HFILL } },

    { &hf_get_errmap_version, {"Version", "couchbase.geterrmap.version", FT_UINT16, BASE_DEC, NULL,                                              0x0, NULL,                                                              HFILL} },

    { &hf_multipath_opcode, { "Opcode", "couchbase.multipath.opcode", FT_UINT8, BASE_HEX|BASE_EXT_STRING, &client_opcode_vals_ext,               0x0, "Command code",                                                    HFILL } },
    { &hf_multipath_index, { "Index", "couchbase.multipath.index", FT_UINT8, BASE_DEC, NULL,                                                     0x0, NULL,                                                              HFILL } },
    { &hf_multipath_pathlen, { "Path Length", "couchbase.multipath.path.length", FT_UINT16, BASE_DEC, NULL,                                      0x0, NULL,                                                              HFILL } },
    { &hf_multipath_path, { "Path", "couchbase.multipath.path", FT_STRING, BASE_NONE, NULL,                                                      0x0, NULL,                                                              HFILL } },
    { &hf_multipath_valuelen, { "Value Length", "couchbase.multipath.value.length", FT_UINT32, BASE_DEC, NULL,                                   0x0, NULL,                                                              HFILL } },
    { &hf_multipath_value, { "Value", "couchbase.multipath.value", FT_STRING, BASE_NONE, NULL,                                                   0x0, NULL,                                                              HFILL } },

    { &hf_meta_flags, {"Flags", "couchbase.extras.flags", FT_UINT32, BASE_HEX, NULL,                                                             0x0, NULL,                                                              HFILL} },
    { &hf_meta_expiration, {"Expiration", "couchbase.extras.expiration", FT_UINT32, BASE_HEX, NULL,                                              0x0, NULL,                                                              HFILL} },
    { &hf_meta_revseqno, {"RevSeqno", "couchbase.extras.revseqno", FT_UINT64, BASE_HEX, NULL,                                                    0x0, NULL,                                                              HFILL} },
    { &hf_meta_cas, {"CAS", "couchbase.extras.cas", FT_UINT64, BASE_HEX, NULL,                                                                   0x0, NULL,                                                              HFILL} },
    { &hf_meta_options, {"Options", "couchbase.extras.options", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL} },
    { &hf_force_meta, {"FORCE_WITH_META_OP", "couchbase.extras.options.force_with_meta_op", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0001, NULL, HFILL} },
    { &hf_force_accept, {"FORCE_ACCEPT_WITH_META_OPS", "couchbase.extras.options.force_accept_with_meta_ops", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0002, NULL, HFILL} },
    { &hf_regenerate_cas, {"REGENERATE_CAS", "couchbase.extras.option.regenerate_cas", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0004, NULL, HFILL} },
    { &hf_skip_conflict, {"SKIP_CONFLICT_RESOLUTION", "couchbase.extras.options.skip_conflict_resolution", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0008, NULL, HFILL} },
    { &hf_is_expiration, {"IS_EXPIRATION", "couchbase.extras.options.is_expiration", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0010, NULL, HFILL} },
    { &hf_metalen, {"Meta Length", "couchbase.extras.meta_length", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL} },
    { &hf_meta_reqextmeta, {"ReqExtMeta", "couchbase.extras.reqextmeta", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL} },
    { &hf_meta_deleted, {"Deleted", "couchbase.extras.deleted", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL} },
    { &hf_exptime, {"Expiry", "couchbase.extras.expiry", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL} },
    { &hf_extras_meta_seqno, {"Seqno", "couchbase.extras.meta.seqno", FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL} },
    { &hf_confres, {"ConfRes", "couchbase.extras.confres", FT_UINT8, BASE_HEX, NULL, 0x0, "Conflict Resolution Mode", HFILL} },

    { &hf_bucket_type, {"Bucket Type", "couchbase.bucket.type", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
    { &hf_bucket_config, {"Bucket Config", "couchbase.bucket.config", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
    { &hf_config_key, {"Key", "couchbase.bucket.config.key", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
    { &hf_config_value, {"Value", "couchbase.bucket.config.value", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
    { &hf_hello_features, {"Hello Features", "couchbase.hello.features", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL} },
    { &hf_hello_features_feature, {"Feature", "couchbase.hello.features.feature", FT_UINT16, BASE_HEX, VALS(feature_vals), 0x0, NULL, HFILL} },

    { &hf_xattrs, { "XATTRs", "couchbase.xattrs", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL} },
    { &hf_xattr_length, {  "XATTR Length", "couchbase.xattrs.length", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL} },
    { &hf_xattr_pair_length, { "XATTR Pair Length", "couchbase.xattrs.pair.length", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL} },
    { &hf_xattr_key, { "Key", "couchbase.xattrs.pair.key", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
    { &hf_xattr_value, { "Value", "couchbase.xattrs.pair.value", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },


    { &hf_server_extras_cccp_epoch, { "Epoch", "couchbase.server.extras.cccp.epoch", FT_INT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_server_extras_cccp_revno, { "Revision", "couchbase.server.extras.cccp.revision", FT_INT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_server_clustermap_value, { "Clustermap", "couchbase.server.clustermap.value", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
    { &hf_server_authentication, { "Authentication", "couchbase.server.authentication", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
    { &hf_server_external_users, { "External users", "couchbase.server.external_users", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
    { &hf_server_get_authorization, { "Authorization", "couchbase.server.authorization", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },

    { &hf_range_scan_uuid, { "Range Scan UUID", "couchbase.range_scan.uuid", FT_GUID, BASE_NONE, NULL, 0x0, NULL, HFILL } },
    { &hf_range_scan_item_limit, { "Range Scan item limit", "couchbase.range_scan.item_limit", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_range_scan_time_limit, { "Range Scan time limit", "couchbase.range_scan.time_limit", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
    { &hf_range_scan_byte_limit, { "Range Scan byte limit", "couchbase.range_scan.byte_limit", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }
  };

  static ei_register_info ei[] = {
    { &ei_value_missing, { "couchbase.value_missing", PI_PROTOCOL, PI_WARN, "Value is mandatory for this command", EXPFILL }},
    { &ef_warn_shall_not_have_value, { "couchbase.warn.shall_not_have_value", PI_UNDECODED, PI_WARN, "Packet shall not have value", EXPFILL }},
    { &ef_warn_shall_not_have_extras, { "couchbase.warn.shall_not_have_extras", PI_UNDECODED, PI_WARN, "Packet shall not have extras", EXPFILL }},
    { &ef_warn_shall_not_have_key, { "couchbase.warn.shall_not_have_key", PI_UNDECODED, PI_WARN, "Packet shall not have key", EXPFILL }},
    { &ef_warn_must_have_extras, { "couchbase.warn.must_have_extras", PI_UNDECODED, PI_WARN, "Packet must have extras", EXPFILL }},
    { &ef_warn_must_have_key, { "couchbase.warn.must_have_key", PI_UNDECODED, PI_WARN, "%s %s must have Key", EXPFILL }},
    { &ef_warn_illegal_extras_length, { "couchbase.warn.illegal_extras_length", PI_UNDECODED, PI_WARN, "Illegal Extras length", EXPFILL }},
    { &ef_warn_illegal_value_length, { "couchbase.warn.illegal_value_length", PI_UNDECODED, PI_WARN, "Illegal Value length", EXPFILL }},
    { &ef_warn_unknown_magic_byte, { "couchbase.warn.unknown_magic_byte", PI_UNDECODED, PI_WARN, "Unknown magic byte", EXPFILL }},
    { &ef_warn_unknown_opcode, { "couchbase.warn.unknown_opcode", PI_UNDECODED, PI_WARN, "Unknown opcode", EXPFILL }},
    { &ef_warn_unknown_extras, { "couchbase.warn.unknown_extras", PI_UNDECODED, PI_WARN, "Unknown extras", EXPFILL }},
    { &ef_note_status_code, { "couchbase.note.status_code", PI_RESPONSE_CODE, PI_NOTE, "Status", EXPFILL }},
    { &ef_separator_not_found, { "couchbase.warn.separator_not_found", PI_UNDECODED, PI_WARN, "Separator not found", EXPFILL }},
    { &ef_illegal_value, { "couchbase.warn.illegal_value", PI_UNDECODED, PI_WARN, "Illegal value for command", EXPFILL }},
    { &ef_compression_error, { "couchbase.error.compression", PI_UNDECODED, PI_WARN, "Compression error", EXPFILL }},
    { &ef_warn_unknown_flex_unsupported, { "couchbase.warn.unsupported_flexible_frame", PI_UNDECODED, PI_WARN, "Flexible Response ID warning", EXPFILL }},
    { &ef_warn_unknown_flex_id, { "couchbase.warn.unknown_flexible_frame_id", PI_UNDECODED, PI_WARN, "Flexible Response ID warning", EXPFILL }},
    { &ef_warn_unknown_flex_len, { "couchbase.warn.unknown_flexible_frame_len", PI_UNDECODED, PI_WARN, "Flexible Response ID warning", EXPFILL }}
  };

  static gint *ett[] = {
    &ett_couchbase,
    &ett_extras,
    &ett_flex_frame_extras,
    &ett_extras_flags,
    &ett_observe,
    &ett_failover_log,
    &ett_vbucket_states,
    &ett_multipath,
    &ett_config,
    &ett_config_key,
    &ett_hello_features,
    &ett_datatype,
    &ett_xattrs,
    &ett_xattr_pair,
    &ett_collection_key
  };

  module_t *couchbase_module;
  expert_module_t* expert_couchbase;

  proto_couchbase = proto_register_protocol(PNAME, PSNAME, PFNAME);

  proto_register_field_array(proto_couchbase, hf, array_length(hf));
  proto_register_subtree_array(ett, array_length(ett));

  expert_couchbase = expert_register_protocol(proto_couchbase);
  expert_register_field_array(expert_couchbase, ei, array_length(ei));

  /* Register our configuration options */
  couchbase_module = prefs_register_protocol(proto_couchbase, &proto_reg_handoff_couchbase);

  couchbase_handle = register_dissector("couchbase", dissect_couchbase_pdu, proto_couchbase);

  prefs_register_bool_preference(couchbase_module, "desegment_pdus",
                                 "Reassemble PDUs spanning multiple TCP segments",
                                 "Whether the Couchbase dissector should reassemble PDUs"
                                 " spanning multiple TCP segments."
                                 " To use this option, you must also enable \"Allow subdissectors"
                                 " to reassemble TCP streams\" in the TCP protocol settings.",
                                 &couchbase_desegment_body);

  prefs_register_uint_preference(couchbase_module, "tls.port", "SSL/TLS Data Port",
                                 "The port used for communicating with the data service via SSL/TLS",
                                 10, &couchbase_ssl_port_pref);
  prefs_register_obsolete_preference(couchbase_module, "ssl_port");
}

/* Register the tcp couchbase dissector. */
void
proto_reg_handoff_couchbase(void)
{
  static gboolean initialized = FALSE;

  if (!initialized){
    json_handle = find_dissector_add_dependency("json", proto_couchbase);
    dissector_add_uint_range_with_preference("tcp.port", COUCHBASE_DEFAULT_PORT, couchbase_handle);
    initialized = TRUE;
  } else {
    ssl_dissector_delete(couchbase_ssl_port, couchbase_handle);
  }
  couchbase_ssl_port = couchbase_ssl_port_pref;
  ssl_dissector_add(couchbase_ssl_port, couchbase_handle);
}

/*
 * Editor modelines
 *
 * Local Variables:
 * c-basic-offset: 2
 * tab-width: 8
 * indent-tabs-mode: nil
 * End:
 *
 * ex: set shiftwidth=2 tabstop=8 expandtab:
 * :indentSize=2:tabSize=8:noTabs=true:
 */