aboutsummaryrefslogtreecommitdiffstats
path: root/packet-icq.c
blob: 1b5265537f116ffe796dbef345a428b1ac0d57ed (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
/* packet-icq.c
 * Routines for ICQ packet disassembly
 *
 * $Id: packet-icq.c,v 1.48 2002/08/28 21:00:17 jmayer Exp $
 *
 * Ethereal - Network traffic analyzer
 * By Gerald Combs <gerald@ethereal.com>
 * Copyright 1998 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

/*
 * This file: by Kojak <kojak@bigwig.net>
 *
 * Decoding code ripped, reference to the original author at the
 * appropriate place with the code itself.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifdef HAVE_STDDEF_H
#include <stddef.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <ctype.h>
#include <time.h>
#include <string.h>
#include <glib.h>

#include <epan/packet.h>
#include <epan/resolv.h>

static int proto_icq = -1;
static int hf_icq_uin = -1;
static int hf_icq_client_cmd = -1;
static int hf_icq_server_cmd = -1;
static int hf_icq_sessionid = -1;
static int hf_icq_checkcode = -1;
static int hf_icq_decode = -1;
static int hf_icq_type = -1;

static gint ett_icq = -1;
static gint ett_icq_header = -1;
static gint ett_icq_decode = -1;
static gint ett_icq_body = -1;
static gint ett_icq_body_parts = -1;

#define UDP_PORT_ICQ	4000

enum { ICQ5_client, ICQ5_server};

static void dissect_icqv5(tvbuff_t *tvb,
		   packet_info *pinfo,
		   proto_tree *tree);

static void
dissect_icqv5Server(tvbuff_t *tvb,
		    int offset,
		    packet_info *pinfo,
		    proto_tree *tree,
		    int pktsize);

/* Offsets of fields in the ICQ headers */
/* Can be 0x0002 or 0x0005 */
#define ICQ_VERSION		0x00
/* Is either one (server) or four (client) bytes long */
/* Client header offsets */
#define ICQ5_UNKNOWN		0x02
#define ICQ5_CL_UIN		0x06
#define ICQ5_CL_SESSIONID	0x0a
#define ICQ5_CL_CMD		0x0e
#define ICQ5_CL_SEQNUM1		0x10
#define ICQ5_CL_SEQNUM2		0x12
#define ICQ5_CL_CHECKCODE	0x14
#define ICQ5_CL_PARAM		0x18
#define ICQ5_CL_HDRSIZE		0x18

/* Server header offsets */
#define ICQ5_SRV_SESSIONID	0x03
#define ICQ5_SRV_CMD		0x07
#define ICQ5_SRV_SEQNUM1	0x09
#define ICQ5_SRV_SEQNUM2	0x0b
#define ICQ5_SRV_UIN		0x0d
#define ICQ5_SRV_CHECKCODE	0x11
#define ICQ5_SRV_PARAM		0x15
#define ICQ5_SRV_HDRSIZE	0x15

#define SRV_ACK			0x000a

#define SRV_SILENT_TOO_LONG	0x001e

#define SRV_GO_AWAY		0x0028

#define SRV_NEW_UIN		0x0046

/* LOGIN_REPLY is very scary. It has a lot of fields that are undocumented
 * Only the IP field makes sense */
#define SRV_LOGIN_REPLY		0x005a
#define SRV_LOGIN_REPLY_IP	0x000c

#define SRV_BAD_PASS		0x0064

#define SRV_USER_ONLINE		0x006e
#define SRV_USER_ONL_UIN	0x0000
#define SRV_USER_ONL_IP		0x0004
#define SRV_USER_ONL_PORT	0x0008
#define SRV_USER_ONL_REALIP	0x000c
#define SRV_USER_ONL_X1		0x0010
#define SRV_USER_ONL_STATUS	0x0013
#define SRV_USER_ONL_X2		0x0015

#define SRV_USER_OFFLINE	0x0078
#define SRV_USER_OFFLINE_UIN	0x0000

#define SRV_MULTI		0x0212
#define SRV_MULTI_NUM		0x0000

#define SRV_META_USER		0x03de
#define SRV_META_USER_SUBCMD	0x0000
#define SRV_META_USER_RESULT	0x0002
#define SRV_META_USER_DATA	0x0003

#define SRV_UPDATE_SUCCESS	0x01e0

#define SRV_UPDATE_FAIL		0x01ea

/*
 * ICQv5 SRV_META_USER subcommands
 */
#define META_EX_USER_FOUND	0x0190
#define META_USER_FOUND		0x019a
#define META_ABOUT		0x00e6
#define META_USER_INFO		0x00c8

#define SRV_RECV_MESSAGE	0x00dc
#define SRV_RECV_MSG_UIN	0x0000
#define SRV_RECV_MSG_YEAR	0x0004
#define SRV_RECV_MSG_MONTH	0x0006
#define SRV_RECV_MSG_DAY	0x0007
#define SRV_RECV_MSG_HOUR	0x0008
#define SRV_RECV_MSG_MINUTE	0x0009
#define SRV_RECV_MSG_MSG_TYPE	0x000a

#define SRV_RAND_USER		0x024e
#define SRV_RAND_USER_UIN	0x0000
#define SRV_RAND_USER_IP	0x0004
#define SRV_RAND_USER_PORT	0x0008
#define SRV_RAND_USER_REAL_IP	0x000c
#define SRV_RAND_USER_CLASS	0x0010
#define SRV_RAND_USER_X1	0x0011
#define SRV_RAND_USER_STATUS	0x0015
#define SRV_RAND_USER_TCP_VER	0x0019

/* This message has the same structure as cmd_send_msg */
#define SRV_SYS_DELIVERED_MESS	0x0104

static const value_string serverMetaSubCmdCode[] = {
    { META_USER_FOUND, "META_USER_FOUND" },
    { META_EX_USER_FOUND, "META_EX_USER_FOUND"  },
    { META_ABOUT, "META_ABOUT" },
    { META_USER_INFO, "META_USER_INFO" },
    { 0, NULL }
};

static const value_string serverCmdCode[] = {
    { SRV_ACK, "SRV_ACK" },
    { SRV_SILENT_TOO_LONG, "SRV_SILENT_TOO_LONG" },
    { SRV_GO_AWAY, "SRV_GO_AWAY" },
    { SRV_NEW_UIN, "SRV_NEW_UIN" },
    { SRV_LOGIN_REPLY, "SRV_LOGIN_REPLY" },
    { SRV_BAD_PASS, "SRV_BAD_PASS" },
    { SRV_USER_ONLINE, "SRV_USER_ONLINE" },
    { SRV_USER_OFFLINE, "SRV_USER_OFFLINE" },
    { 130, "SRV_QUERY" },
    { 140, "SRV_USER_FOUND" },
    { 160, "SRV_END_OF_SEARCH" },
    { 180, "SRV_NEW_USER" },
    { 200, "SRV_UPDATE_EXT" },
    { SRV_RECV_MESSAGE, "SRV_RECV_MESSAGE" },
    { 230, "SRV_END_OFFLINE_MESSAGES" },
    { 240, "SRV_NOT_CONNECTED" },
    { 250, "SRV_TRY_AGAIN" },
    { SRV_SYS_DELIVERED_MESS, "SRV_SYS_DELIVERED_MESS" },
    { 280, "SRV_INFO_REPLY" },
    { 290, "SRV_EXT_INFO_REPLY" },
    { 420, "SRV_STATUS_UPDATE" },
    { 450, "SRV_SYSTEM_MESSAGE" },
    { SRV_UPDATE_SUCCESS, "SRV_UPDATE_SUCCESS" },
    { SRV_UPDATE_FAIL, "SRV_UPDATE_FAIL" },
    { 500, "SRV_AUTH_UPDATE" },
    { SRV_MULTI, "SRV_MULTI_PACKET" },
    { 540, "SRV_END_CONTACTLIST_STATUS" },
    { SRV_RAND_USER, "SRV_RAND_USER" },
    { SRV_META_USER, "SRV_META_USER" },
    { 0, NULL }
};

#define MSG_TEXT		0x0001
#define MSG_URL			0x0004
#define MSG_AUTH_REQ		0x0006
#define MSG_AUTH		0x0008
#define MSG_USER_ADDED		0x000c
#define MSG_EMAIL		0x000e
#define MSG_CONTACTS		0x0013

#define STATUS_ONLINE		0x00000000
#define STATUS_AWAY		0x00000001
#define STATUS_DND		0x00000013
#define STATUS_INVISIBLE	0x00000100
#define STATUS_OCCUPIED		0x00000010
#define STATUS_NA		0x00000004
#define STATUS_CHAT		0x00000020

/* Offsets for all packets measured from the start of the payload; i.e.
 * with the ICQ header removed
 */
#define CMD_ACK			0x000a
#define CMD_ACK_RANDOM		0x0000

#define CMD_SEND_MSG		0x010E
#define CMD_SEND_MSG_RECV_UIN	0x0000
#define CMD_SEND_MSG_MSG_TYPE	0x0004
#define CMD_SEND_MSG_MSG_LEN	0x0006
#define CMD_SEND_MSG_MSG_TEXT	0x0008
/* The rest of the packet should be a null-term string */

#define CMD_LOGIN		0x03E8
#define CMD_LOGIN_TIME		0x0000
#define CMD_LOGIN_PORT		0x0004
#define CMD_LOGIN_PASSLEN	0x0008
#define CMD_LOGIN_PASSWD	0x000A
/* The password is variable length; so when we've decoded the passwd,
 * the structure starts counting at 0 again.
 */
#define CMD_LOGIN_IP		0x0004
#define CMD_LOGIN_STATUS	0x0009

#define CMD_CONTACT_LIST	0x0406
#define CMD_CONTACT_LIST_NUM	0x0000

#define CMD_USER_META		0x064a

#define CMD_REG_NEW_USER	0x03fc

#define CMD_ACK_MESSAGES	0x0442
#define CMD_ACK_MESSAGES_RANDOM	0x0000

#define CMD_KEEP_ALIVE		0x042e
#define CMD_KEEP_ALIVE_RANDOM	0x0000

#define CMD_SEND_TEXT_CODE	0x0438
#define CMD_SEND_TEXT_CODE_LEN	0x0000
#define CMD_SEND_TEXT_CODE_TEXT	0x0002

#define CMD_MSG_TO_NEW_USER     0x0456

#define CMD_QUERY_SERVERS	0x04ba

#define CMD_QUERY_ADDONS	0x04c4

#define CMD_STATUS_CHANGE	0x04d8
#define CMD_STATUS_CHANGE_STATUS	0x0000

#define CMD_ADD_TO_LIST		0x053c
#define CMD_ADD_TO_LIST_UIN	0x0000

#define CMD_RAND_SEARCH		0x056e
#define CMD_RAND_SEARCH_GROUP	0x0000

#define CMD_META_USER		0x064a

static const value_string msgTypeCode[] = {
    { MSG_TEXT, "MSG_TEXT" },
    { MSG_URL, "MSG_URL" },
    { MSG_AUTH_REQ, "MSG_AUTH_REQ" },
    { MSG_AUTH, "MSG_AUTH" },
    { MSG_USER_ADDED, "MSG_USER_ADDED" },
    { MSG_EMAIL, "MSG_EMAIL" },
    { MSG_CONTACTS, "MSG_CONTACTS" },
    { 0, NULL }
};

static const value_string statusCode[] = {
    { STATUS_ONLINE, "ONLINE" },
    { STATUS_AWAY, "AWAY" },
    { STATUS_DND, "DND" },
    { STATUS_INVISIBLE, "INVISIBLE" },
    { STATUS_OCCUPIED, "OCCUPIED" },
    { STATUS_NA, "NA" },
    { STATUS_CHAT, "Free for Chat" },
    { 0, NULL }
};

static const value_string clientCmdCode[] = {
    { CMD_ACK, "CMD_ACK" },
    { CMD_SEND_MSG, "CMD_SEND_MESSAGE" },
    { CMD_LOGIN, "CMD_LOGIN" },
    { CMD_REG_NEW_USER, "CMD_REG_NEW_USER" },
    { 1030, "CMD_CONTACT_LIST" },
    { 1050, "CMD_SEARCH_UIN" },
    { 1060, "CMD_SEARCH_USER" },
    { 1070, "CMD_KEEP_ALIVE" },
    { CMD_SEND_TEXT_CODE, "CMD_SEND_TEXT_CODE" },
    { CMD_ACK_MESSAGES, "CMD_ACK_MESSAGES" },
    { 1100, "CMD_LOGIN_1" },
    { CMD_MSG_TO_NEW_USER, "CMD_MSG_TO_NEW_USER" },
    { 1120, "CMD_INFO_REQ" },
    { 1130, "CMD_EXT_INFO_REQ" },
    { 1180, "CMD_CHANGE_PW" },
    { 1190, "CMD_NEW_USER_INFO" },
    { 1200, "CMD_UPDATE_EXT_INFO" },
    { CMD_QUERY_SERVERS, "CMD_QUERY_SERVERS" },
    { CMD_QUERY_ADDONS, "CMD_QUERY_ADDONS" },
    { CMD_STATUS_CHANGE, "CMD_STATUS_CHANGE" },
    { 1260, "CMD_NEW_USER_1" },
    { 1290, "CMD_UPDATE_INFO" },
    { 1300, "CMD_AUTH_UPDATE" },
    { 1310, "CMD_KEEP_ALIVE2" },
    { 1320, "CMD_LOGIN_2" },
    { CMD_ADD_TO_LIST, "CMD_ADD_TO_LIST" },
    { 1380, "CMD_RAND_SET" },
    { CMD_RAND_SEARCH, "CMD_RAND_SEARCH" },
    { CMD_META_USER, "CMD_META_USER" },
    { 1700, "CMD_INVIS_LIST" },
    { 1710, "CMD_VIS_LIST" },
    { 1720, "CMD_UPDATE_LIST" },
    { 0, NULL }
};

/*
 * All ICQv5 decryption code thanx to Sebastien Dault (daus01@gel.usherb.ca)
 */
static const guchar
table_v5 [] = {
 0x59, 0x60, 0x37, 0x6B, 0x65, 0x62, 0x46, 0x48, 0x53, 0x61, 0x4C, 0x59, 0x60, 0x57, 0x5B, 0x3D,
 0x5E, 0x34, 0x6D, 0x36, 0x50, 0x3F, 0x6F, 0x67, 0x53, 0x61, 0x4C, 0x59, 0x40, 0x47, 0x63, 0x39,
 0x50, 0x5F, 0x5F, 0x3F, 0x6F, 0x47, 0x43, 0x69, 0x48, 0x33, 0x31, 0x64, 0x35, 0x5A, 0x4A, 0x42,
 0x56, 0x40, 0x67, 0x53, 0x41, 0x07, 0x6C, 0x49, 0x58, 0x3B, 0x4D, 0x46, 0x68, 0x43, 0x69, 0x48,
 0x33, 0x31, 0x44, 0x65, 0x62, 0x46, 0x48, 0x53, 0x41, 0x07, 0x6C, 0x69, 0x48, 0x33, 0x51, 0x54,
 0x5D, 0x4E, 0x6C, 0x49, 0x38, 0x4B, 0x55, 0x4A, 0x62, 0x46, 0x48, 0x33, 0x51, 0x34, 0x6D, 0x36,
 0x50, 0x5F, 0x5F, 0x5F, 0x3F, 0x6F, 0x47, 0x63, 0x59, 0x40, 0x67, 0x33, 0x31, 0x64, 0x35, 0x5A,
 0x6A, 0x52, 0x6E, 0x3C, 0x51, 0x34, 0x6D, 0x36, 0x50, 0x5F, 0x5F, 0x3F, 0x4F, 0x37, 0x4B, 0x35,
 0x5A, 0x4A, 0x62, 0x66, 0x58, 0x3B, 0x4D, 0x66, 0x58, 0x5B, 0x5D, 0x4E, 0x6C, 0x49, 0x58, 0x3B,
 0x4D, 0x66, 0x58, 0x3B, 0x4D, 0x46, 0x48, 0x53, 0x61, 0x4C, 0x59, 0x40, 0x67, 0x33, 0x31, 0x64,
 0x55, 0x6A, 0x32, 0x3E, 0x44, 0x45, 0x52, 0x6E, 0x3C, 0x31, 0x64, 0x55, 0x6A, 0x52, 0x4E, 0x6C,
 0x69, 0x48, 0x53, 0x61, 0x4C, 0x39, 0x30, 0x6F, 0x47, 0x63, 0x59, 0x60, 0x57, 0x5B, 0x3D, 0x3E,
 0x64, 0x35, 0x3A, 0x3A, 0x5A, 0x6A, 0x52, 0x4E, 0x6C, 0x69, 0x48, 0x53, 0x61, 0x6C, 0x49, 0x58,
 0x3B, 0x4D, 0x46, 0x68, 0x63, 0x39, 0x50, 0x5F, 0x5F, 0x3F, 0x6F, 0x67, 0x53, 0x41, 0x25, 0x41,
 0x3C, 0x51, 0x54, 0x3D, 0x5E, 0x54, 0x5D, 0x4E, 0x4C, 0x39, 0x50, 0x5F, 0x5F, 0x5F, 0x3F, 0x6F,
 0x47, 0x43, 0x69, 0x48, 0x33, 0x51, 0x54, 0x5D, 0x6E, 0x3C, 0x31, 0x64, 0x35, 0x5A, 0x00, 0x00 };

static char*
findMsgType(int num)
{
    return val_to_str(num, msgTypeCode, "Unknown");
}

static char*
findSubCmd(int num)
{
    return val_to_str(num, serverMetaSubCmdCode, "Unknown (0x%04x)");
}

static char*
findClientCmd(int num)
{
    return val_to_str(num, clientCmdCode, "Unknown (%u)");
}

static char*
findServerCmd(int num)
{
    return val_to_str(num, serverCmdCode, "Unknown (%u)");
}

static char*
findStatus(int num)
{
    return val_to_str(num, statusCode, "Unknown (0x%08x)");
}

static guint32
get_v5key(tvbuff_t *tvb, int len)
{
    guint32 a1, a2, a3, a4, a5;
    guint32 code, check, key;

    code = tvb_get_letohl(tvb, ICQ5_CL_CHECKCODE);

    a1 = code & 0x0001f000;
    a2 = code & 0x07c007c0;
    a3 = code & 0x003e0001;
    a4 = code & 0xf8000000;
    a5 = code & 0x0000083e;

    a1 = a1 >> 0x0c;
    a2 = a2 >> 0x01;
    a3 = a3 << 0x0a;
    a4 = a4 >> 0x10;
    a5 = a5 << 0x0f;

    check = a5 + a1 + a2 + a3 + a4;
    key = len * 0x68656C6C;
    key += check;
    return key;
}

static void
decrypt_v5(guchar *bfr, guint32 size,guint32 key)
{
    guint32 i;
    guint32 k;

    for (i=ICQ5_CL_SESSIONID; i < size; i+=4 ) {
	k = key+table_v5[i&0xff];
	if ( i != 0x16 ) {
	    bfr[i] ^= (guchar)(k & 0xff);
	    bfr[i+1] ^= (guchar)((k & 0xff00)>>8);
	}
	if ( i != 0x12 ) {
	    bfr[i+2] ^= (guchar)((k & 0xff0000)>>16);
	    bfr[i+3] ^= (guchar)((k & 0xff000000)>>24);
	}
    }
}

static void
dissect_icqv4(tvbuff_t *tvb,
	      packet_info *pinfo,
	      proto_tree *tree)
{
    proto_tree *icq_tree = NULL;
    proto_item *ti = NULL;

    /* Not really implemented yet */
    if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
	col_set_str(pinfo->cinfo, COL_PROTOCOL, "ICQv4 (UDP)");
    }
    if (check_col(pinfo->cinfo, COL_INFO)) {
	col_set_str(pinfo->cinfo, COL_INFO, "ICQ Version 4 protocol");
    }
    if (tree) {
        ti = proto_tree_add_protocol_format(tree,
				 proto_icq,
				 tvb,
				 0,
				 -1,
				 "ICQv4");
        icq_tree = proto_item_add_subtree(ti, ett_icq);

	proto_tree_add_text(icq_tree, tvb,
			    ICQ_VERSION,
			    2,
			    "Version: %u",
			    tvb_get_letohs(tvb, ICQ_VERSION));
    }
}

static void
dissect_icqv3(tvbuff_t *tvb,
	      packet_info *pinfo,
	      proto_tree *tree)
{
    proto_tree *icq_tree = NULL;
    proto_item *ti = NULL;

    /* Not really implemented yet */
    if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
	col_set_str(pinfo->cinfo, COL_PROTOCOL, "ICQv3 (UDP)");
    }
    if (check_col(pinfo->cinfo, COL_INFO)) {
	col_set_str(pinfo->cinfo, COL_INFO, "ICQ Version 3 protocol");
    }
    if (tree) {
        ti = proto_tree_add_protocol_format(tree,
				 proto_icq,
				 tvb,
				 0,
				 -1,
				 "ICQv3");
        icq_tree = proto_item_add_subtree(ti, ett_icq);

	proto_tree_add_text(icq_tree, tvb,
			    ICQ_VERSION,
			    2,
			    "Version: %u",
			    tvb_get_letohs(tvb, ICQ_VERSION));
    }
}

static void
dissect_icqv2(tvbuff_t *tvb,
	      packet_info *pinfo,
	      proto_tree *tree)
{
    proto_tree *icq_tree = NULL;
    proto_item *ti = NULL;

    /* Not really implemented yet */
    if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
	col_set_str(pinfo->cinfo, COL_PROTOCOL, "ICQv2 (UDP)");
    }
    if (check_col(pinfo->cinfo, COL_INFO)) {
	col_set_str(pinfo->cinfo, COL_INFO, "ICQ Version 2 protocol");
    }
    if (tree) {
        ti = proto_tree_add_protocol_format(tree,
				 proto_icq,
				 tvb,
				 0,
				 -1,
				 "ICQv2");
        icq_tree = proto_item_add_subtree(ti, ett_icq);

	proto_tree_add_text(icq_tree, tvb,
			    ICQ_VERSION,
			    2,
			    "Version: %u",
			    tvb_get_letohs(tvb, ICQ_VERSION));
    }
}

/*
 * The packet has, at offset "offset" a (len, string) pair.
 * Display the length and string in the tree.
 *
 * If anything is wrong, return -1, since -1 is not a valid string
 * length. Else, return the number of chars processed.
 */
static guint16
proto_add_icq_attr(proto_tree* tree, /* The tree to add to */
		   tvbuff_t *tvb,    /* Tvbuff with packet */
		   const int offset, /* Offset from the start of packet of field */
		   char* descr)	/* The description to use in the tree */
{
    guint16 len;

    len = tvb_get_letohs(tvb, offset);
    if (len > tvb_reported_length_remaining(tvb, offset))
	return -1;	/* length goes past end of packet */
    proto_tree_add_text(tree, tvb,
			offset,
			sizeof(guint16) + len,
			"%s[%u]: %.*s", descr, len, len,
			tvb_get_ptr(tvb, offset + sizeof(guint16), len));
    return len + sizeof(guint16);
}

static void
icqv5_decode_msgType(proto_tree* tree,
		     tvbuff_t *tvb,
		     int offset,
		     int size)
{
    proto_item* ti = NULL;
    proto_tree* subtree = NULL;
    int left = size;
    guint16 msgType;
    gint sep_offset;
    int sz;            /* Size of the current element */
    unsigned int n;
    static char* url_field_descr[] = {
	"Description",
	"URL",
    };
#define N_URL_FIELDS	(sizeof url_field_descr / sizeof url_field_descr[0])
    static char* email_field_descr[] = {
	"Nickname",
	"First name",
	"Last name",
	"Email address",
	"Unknown",
	"Text"
    };
#define N_EMAIL_FIELDS	(sizeof email_field_descr / sizeof email_field_descr[0])
    static char* auth_req_field_descr[] = {
	"Nickname",
	"First name",
	"Last name",
	"Email address",
	"Unknown",
	"Reason"
    };
#define N_AUTH_REQ_FIELDS	(sizeof auth_req_field_descr / sizeof auth_req_field_descr[0])
    static char* user_added_field_descr[] = {
	"Nickname",
	"First name",
	"Last name",
	"Email address",
    };
#define N_USER_ADDED_FIELDS	(sizeof user_added_field_descr / sizeof user_added_field_descr[0])

    msgType = tvb_get_letohs(tvb, offset);
    ti = proto_tree_add_text(tree, tvb,
			     offset,
			     size,
			     "Message: Type = %u (%s)", msgType, findMsgType(msgType));
    /* Create a new subtree */
    subtree = proto_item_add_subtree(ti, ett_icq_body_parts);

    proto_tree_add_text(subtree, tvb,
			offset,
			2,
			"Type: %u (%s)", msgType, findMsgType(msgType));
    offset += 2;
    left -= 2;
    if (msgType != MSG_AUTH) {
	/*
	 * XXX - does a MSG_AUTH message really have 3 bytes of information
	 * rather than a length field?
	 */
	proto_tree_add_text(subtree, tvb,
			    offset,
			    2,
			    "Length: %u",
			    tvb_get_letohs(tvb, offset));
	offset += 2;
	left -= 2;
    }

    switch(msgType) {
    case 0xffff:           /* Field unknown */
	break;
    default:
	fprintf(stderr, "Unknown msgType: %u (%04x)\n", msgType, msgType);
	break;
    case MSG_TEXT:
	proto_tree_add_text(subtree, tvb,
			    offset,
			    left,
			    "Msg: %.*s", left-1,
			    tvb_get_ptr(tvb, offset, left));
	break;
    case MSG_URL:
	for (n = 0; n < N_URL_FIELDS; n++) {
	    if (n != N_URL_FIELDS - 1) {
		sep_offset = tvb_find_guint8(tvb, offset, left, 0xfe);
		sz = sep_offset - offset + 1;
	    } else
		sz = left;
	    if (sz != 0) {
		proto_tree_add_text(subtree, tvb,
				    offset,
				    sz,
				    "%s: %.*s",
				    url_field_descr[n],
				    sz - 1,
				    tvb_get_ptr(tvb, offset, sz));
	    } else {
		proto_tree_add_text(subtree, tvb,
				    offset,
				    0,
				    "%s: %s", url_field_descr[n], "(empty)");
	    }
	    offset += sz;
	    left -= sz;
	}
	break;
    case MSG_EMAIL:
	for (n = 0; n < N_EMAIL_FIELDS; n++) {
	    if (n != N_EMAIL_FIELDS - 1) {
		sep_offset = tvb_find_guint8(tvb, offset, left, 0xfe);
		sz = sep_offset - offset + 1;
	    } else
		sz = left;
	    if (sz != 0) {
		proto_tree_add_text(subtree, tvb,
				    offset,
				    sz,
				    "%s: %.*s",
				    email_field_descr[n],
				    sz - 1,
				    tvb_get_ptr(tvb, offset, sz));
	    } else {
		proto_tree_add_text(subtree, tvb,
				    offset,
				    0,
				    "%s: %s", email_field_descr[n], "(empty)");
	    }
	    offset += sz;
	    left -= sz;
	}
	break;

    case MSG_AUTH:
    {
	/* Three bytes, first is a char signifying success */
	unsigned char auth_suc;

	auth_suc = tvb_get_guint8(tvb, offset);
	proto_tree_add_text(subtree, tvb,
			    offset,
			    1,
			    "Authorization: (%u) %s",auth_suc,
			    (auth_suc==0)?"Denied":"Allowed");
	offset++;
	proto_tree_add_text(subtree, tvb,
			    offset,
			    sizeof(guint16),
			    "x1: 0x%04x",
			    tvb_get_letohs(tvb, offset));
	break;
    }
    case MSG_AUTH_REQ:
	for (n = 0; n < N_AUTH_REQ_FIELDS; n++) {
	    if (n != N_AUTH_REQ_FIELDS - 1) {
		sep_offset = tvb_find_guint8(tvb, offset, left, 0xfe);
		sz = sep_offset - offset + 1;
	    } else
		sz = left;
	    if (sz != 0) {
		proto_tree_add_text(subtree, tvb,
				    offset,
				    sz,
				    "%s: %.*s",
				    auth_req_field_descr[n],
				    sz - 1,
				    tvb_get_ptr(tvb, offset, sz));
	    } else {
		proto_tree_add_text(subtree, tvb,
				    offset,
				    0,
				    "%s: %s", auth_req_field_descr[n], "(empty)");
	    }
	    offset += sz;
	    left -= sz;
	}
	break;
    case MSG_USER_ADDED:
	for (n = 0; n < N_USER_ADDED_FIELDS; n++) {
	    if (n != N_USER_ADDED_FIELDS - 1) {
		sep_offset = tvb_find_guint8(tvb, offset, left, 0xfe);
		sz = sep_offset - offset + 1;
	    } else
		sz = left;
	    if (sz != 0) {
		proto_tree_add_text(subtree, tvb,
				    offset,
				    sz,
				    "%s: %.*s",
				    user_added_field_descr[n],
				    sz - 1,
				    tvb_get_ptr(tvb, offset, sz));
	    } else {
		proto_tree_add_text(subtree, tvb,
				    offset,
				    0,
				    "%s: %s", user_added_field_descr[n], "(empty)");
	    }
	    offset += sz;
	    left -= sz;
	}
	break;
    case MSG_CONTACTS:
    {
	gint sep_offset_prev;
	int sz = 0;            /* Size of the current element */
	int n = 0;             /* The nth element */
	gboolean last = FALSE;

	while (!last) {
	    sep_offset = tvb_find_guint8(tvb, offset, left, 0xfe);
	    if (sep_offset != -1)
		sz = sep_offset - offset + 1;
	    else {
		sz = left;
		last = TRUE;
	    }
	    if (n == 0) {
		/* The first element is the number of Nick/UIN pairs follow */
		proto_tree_add_text(subtree, tvb,
				    offset,
				    sz,
				    "Number of pairs: %.*s",
				    sz - 1,
				    tvb_get_ptr(tvb, offset, sz));
		n++;
	    } else if (!last) {
		int svsz = sz;

		left -= sz;
		sep_offset_prev = sep_offset;
		sep_offset = tvb_find_guint8(tvb, sep_offset_prev, left,
					     0xfe);
		if (sep_offset != -1)
		    sz = sep_offset - offset + 1;
		else {
		    sz = left;
		    last = TRUE;
		}
		proto_tree_add_text(subtree, tvb,
				    offset,
				    sz + svsz,
				    "%.*s: %.*s",
				    svsz - 1,
				    tvb_get_ptr(tvb, offset, svsz),
				    sz - 1,
				    tvb_get_ptr(tvb, sep_offset_prev + 1, sz));
		n += 2;
	    }

	    left -= (sz+1);
	    offset = sep_offset + 1;
	}
	break;
    }
    }
}

/*********************************
 *
 * Client commands
 *
 *********************************/
static void
icqv5_cmd_ack(proto_tree* tree,/* Tree to put the data in */
	      tvbuff_t *tvb, /* Tvbuff with decrypted packet data */
	      int offset) /* Offset from the start of the packet to the content */
{
    proto_tree* subtree;
    proto_item* ti;

    if (tree){
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 4,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	proto_tree_add_text(subtree, tvb,
			    offset + CMD_ACK_RANDOM,
			    4,
			    "Random: 0x%08x",
			    tvb_get_letohl(tvb, offset + CMD_ACK_RANDOM));
    }
}

static void
icqv5_cmd_rand_search(proto_tree* tree, /* Tree to put the data in */
		      tvbuff_t *tvb,    /* Decrypted packet content */
		      int offset,       /* Offset from the start of the packet to the content */
		      int size)         /* Number of chars left to do */
{
    guint16 group;
    proto_tree* subtree;
    proto_item* ti;

    static const char* groups[] = {
	"Name",
	"General",
	"Romance",
	"Games",
	"Students",
	"20 Something",
	"30 Something",
	"40 Something",
	"50 or worse",
	"Man want women",
	"Women want men"
    };

    if (tree){
	if (size < 4) {
	    ti = proto_tree_add_text(tree,
				     tvb,
				     offset,
				     size,
				     "Body (%d bytes, should be 4)", size);
	    return;
	}
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 4,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	group = tvb_get_letohs(tvb, offset + CMD_RAND_SEARCH_GROUP);
	if (group>0 && (group<=sizeof(groups)/sizeof(const char*)))
	    proto_tree_add_text(subtree, tvb,
				offset + CMD_RAND_SEARCH_GROUP,
				4,
				"Group: (%u) %s", group, groups[group-1]);
	else
	    proto_tree_add_text(subtree, tvb,
				offset + CMD_RAND_SEARCH_GROUP,
				4,
				"Group: (%u)", group);
    }
}

static void
icqv5_cmd_ack_messages(proto_tree* tree, /* Tree to put the data in */
		       tvbuff_t *tvb,    /* Decrypted packet content */
		       int offset)       /* Offset from the start of the packet to the content */
{
    proto_tree* subtree;
    proto_item* ti;

    if (tree){
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 4,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	proto_tree_add_text(subtree, tvb,
			    offset + CMD_ACK_MESSAGES_RANDOM,
			    4,
			    "Random: 0x%08x",
			    tvb_get_letohl(tvb, offset + CMD_ACK_MESSAGES_RANDOM));
    }
}

static void
icqv5_cmd_keep_alive(proto_tree* tree, /* Tree to put the data in */
		     tvbuff_t *tvb,    /* Decrypted packet content */
		     int offset)       /* Offset from the start of the packet to the content */
{
    guint32 random;
    proto_tree* subtree;
    proto_item* ti;

    if (tree){
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 4,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	random = tvb_get_letohl(tvb, offset + CMD_KEEP_ALIVE_RANDOM);
	proto_tree_add_text(subtree, tvb,
			    offset + CMD_KEEP_ALIVE_RANDOM,
			    4,
			    "Random: 0x%08x", random);
    }
}

static void
icqv5_cmd_send_text_code(proto_tree* tree, /* Tree to put the data in */
			 tvbuff_t *tvb,    /* Decrypted packet content */
			 int offset,       /* Offset from the start of the packet to the content */
			 int size)         /* Number of chars left to do */
{
    proto_tree* subtree = NULL;
    proto_item* ti = NULL;
    guint16 len;
    guint16 x1;

    if (tree){
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 size,
				 "Body");
    }

    len = tvb_get_letohs(tvb, offset+CMD_SEND_TEXT_CODE_LEN);
    if (tree){
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	proto_tree_add_text(subtree, tvb,
			    offset + CMD_SEND_TEXT_CODE_LEN,
			    2,
			    "Length: %d", len);
    }

    if (len>0) {
	if (tree){
	    proto_tree_add_text(subtree, tvb,
			    offset + CMD_SEND_TEXT_CODE_TEXT,
			    len,
			    "Text: %.*s",
			    len,
			    tvb_get_ptr(tvb, offset + CMD_SEND_TEXT_CODE_TEXT,
			    		len));
	}
    }

    x1 = tvb_get_letohs(tvb, offset + CMD_SEND_TEXT_CODE_TEXT + len);
    if (tree){
	proto_tree_add_text(subtree, tvb,
			    offset + CMD_SEND_TEXT_CODE_TEXT + len,
			    2,
			    "X1: 0x%04x", x1);
    }
}

static void
icqv5_cmd_add_to_list(proto_tree* tree, /* Tree to put the data in */
		      tvbuff_t *tvb,    /* Decrypted packet content */
		      int offset)       /* Offset from the start of the packet to the content */
{
    guint32 uin;
    proto_tree* subtree;
    proto_item* ti;

    if (tree){
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 4,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	uin = tvb_get_letohl(tvb, offset + CMD_ADD_TO_LIST);
	proto_tree_add_text(subtree, tvb,
			    offset + CMD_ADD_TO_LIST_UIN,
			    4,
			    "UIN: %u", uin);
    }
}

static void
icqv5_cmd_status_change(proto_tree* tree, /* Tree to put the data in */
		        tvbuff_t *tvb,    /* Decrypted packet content */
			int offset)       /* Offset from the start of the packet to the content */
{
    guint32 status;
    proto_tree* subtree;
    proto_item* ti;

    if (tree){
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 4,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	status = tvb_get_letohl(tvb, offset + CMD_STATUS_CHANGE_STATUS);
	proto_tree_add_text(subtree, tvb,
			    offset + CMD_STATUS_CHANGE_STATUS,
			    4,
			    "Status: %s", findStatus(status));
    }
}

static void
icqv5_cmd_send_msg(proto_tree* tree,
		   tvbuff_t *tvb,
		   int offset,
		   int size)
{
    proto_tree* subtree;
    proto_item* ti;
    int left = size;		/* left chars to do */

    if (tree) {
	if (size < 4) {
	    ti = proto_tree_add_text(tree,
				     tvb,
				     offset,
				     size,
				     "Body (%d bytes, should be >= 4)", size);
	    return;
	}
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 size,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	proto_tree_add_text(subtree, tvb,
			    offset + CMD_SEND_MSG_RECV_UIN,
			    4,
			    "Receiver UIN: %u",
			    tvb_get_letohl(tvb, offset + CMD_SEND_MSG_RECV_UIN));
	left -= 4;

	icqv5_decode_msgType(subtree,
			     tvb,
			     offset + CMD_SEND_MSG_MSG_TYPE,
			     left);
    }
}

static void
icqv5_cmd_login(proto_tree* tree,
		tvbuff_t *tvb,
		int offset,
		int size)
{
    proto_item* ti;
    proto_tree* subtree;
    time_t theTime;
    char *aTime;
    guint32 port;
    guint32 passwdLen;
    const guchar *ipAddrp;
    guint32 status;

    if (tree) {
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 size,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	theTime = tvb_get_letohl(tvb, offset + CMD_LOGIN_TIME);
	aTime = ctime(&theTime);
	aTime[strlen(aTime)-1] = '\0';
	proto_tree_add_text(subtree, tvb,
			    offset + CMD_LOGIN_TIME,
			    4,
			    "Time: %ld = %s", (long)theTime, aTime);
	port = tvb_get_letohl(tvb, offset + CMD_LOGIN_PORT);
	proto_tree_add_text(subtree, tvb,
			    offset + CMD_LOGIN_PORT,
			    4,
			    "Port: %u", port);
	passwdLen = tvb_get_letohs(tvb, offset + CMD_LOGIN_PASSLEN);
	proto_tree_add_text(subtree, tvb,
			    offset + CMD_LOGIN_PASSLEN,
			    2 + passwdLen,
			    "Passwd: %.*s",
			    (int)passwdLen,
			    tvb_get_ptr(tvb, offset + CMD_LOGIN_PASSWD,
					passwdLen));
	ipAddrp = tvb_get_ptr(tvb,
			offset + CMD_LOGIN_PASSWD + passwdLen + CMD_LOGIN_IP,
			4);
	proto_tree_add_text(subtree, tvb,
			    offset + CMD_LOGIN_PASSWD + passwdLen + CMD_LOGIN_IP,
			    4,
			    "IP: %s", ip_to_str(ipAddrp));
	status = tvb_get_letohs(tvb,
	    offset + CMD_LOGIN_PASSWD + passwdLen + CMD_LOGIN_STATUS);
	proto_tree_add_text(subtree, tvb,
			    offset + CMD_LOGIN_PASSWD + passwdLen + CMD_LOGIN_STATUS,
			    4,
			    "Status: %s", findStatus(status));
    }
}

static void
icqv5_cmd_contact_list(proto_tree* tree,
		       tvbuff_t *tvb,
		       int offset,
		       int size)
{
    proto_tree* subtree;
    proto_item* ti;
    unsigned char num;
    int i;
    guint32 uin;

    if (tree) {
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 size,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	num = tvb_get_guint8(tvb, offset + CMD_CONTACT_LIST_NUM);
	proto_tree_add_text(subtree, tvb,
			    offset + CMD_CONTACT_LIST,
			    1,
			    "Number of uins: %u", num);
	/*
	 * A sequence of num times UIN follows
	 */
	offset += (CMD_CONTACT_LIST_NUM + 1);
	for (i = 0; i < num; i++) {
	    uin = tvb_get_letohl(tvb, offset);
	    proto_tree_add_text(subtree, tvb,
				offset,
				4,
				"UIN[%d]: %u", i ,uin);
	    offset += 4;
	}
    }
}

static void
icqv5_cmd_no_params(proto_tree* tree, /* Tree to put the data in */
		    tvbuff_t *tvb,    /* Decrypted packet content */
		    int offset)       /* Offset from the start of the packet to the content */
{
    proto_tree* subtree;
    proto_item* ti;

    if (tree){
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 0,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	proto_tree_add_text(subtree, tvb,
			    offset,
			    0,
			    "No parameters");
    }
}

/**********************
 *
 * Server commands
 *
 **********************
 */
static void
icqv5_srv_no_params(proto_tree* tree, /* Tree to put the data in */
		    tvbuff_t *tvb,    /* Packet content */
		    int offset)       /* Offset from the start of the packet to the content */
{
    proto_tree* subtree;
    proto_item* ti;

    if (tree){
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 0,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	proto_tree_add_text(subtree, tvb,
			    offset,
			    0,
			    "No Parameters");
    }
}

static void
icqv5_srv_login_reply(proto_tree* tree,/* Tree to put the data in */
		      tvbuff_t *tvb,   /* Tvbuff with packet */
		      int offset,      /* Offset from the start of the packet to the content */
		      int size)        /* Number of chars left to do */
{
    proto_tree* subtree;
    proto_item* ti;
    const guchar *ipAddrp;

    if (tree) {
	if (size < SRV_LOGIN_REPLY_IP + 8) {
	    ti = proto_tree_add_text(tree,
				     tvb,
				     offset,
				     size,
				     "Body (%d bytes, should be %d)", size,
				     SRV_LOGIN_REPLY_IP + 8);
	    return;
	}
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 SRV_LOGIN_REPLY_IP + 8,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	ipAddrp = tvb_get_ptr(tvb, offset + SRV_LOGIN_REPLY_IP, 4);
	proto_tree_add_text(subtree, tvb,
			    offset + SRV_LOGIN_REPLY_IP,
			    4,
			    "IP: %s", ip_to_str(ipAddrp));
    }
}

static void
icqv5_srv_user_online(proto_tree* tree,/* Tree to put the data in */
		      tvbuff_t *tvb,   /* Tvbuff with packet */
		      int offset,      /* Offset from the start of the packet to the content */
		      int size)        /* Number of chars left to do */
{
    proto_tree* subtree;
    proto_item* ti;
    const guchar *ipAddrp;
    const guchar *realipAddrp;
    guint32 status;

    if (tree) {
	if (size < SRV_LOGIN_REPLY_IP + 8) {
	    ti = proto_tree_add_text(tree,
				     tvb,
				     offset,
				     size,
				     "Body (%d bytes, should be %d)", size,
				     SRV_LOGIN_REPLY_IP + 8);
	    return;
	}
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 SRV_LOGIN_REPLY_IP + 8,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	proto_tree_add_text(subtree, tvb,
			    offset + SRV_USER_ONL_UIN,
			    4,
			    "UIN: %u",
			    tvb_get_letohl(tvb, offset + SRV_USER_ONL_UIN));
	ipAddrp = tvb_get_ptr(tvb, offset + SRV_USER_ONL_IP, 4);
	proto_tree_add_text(subtree, tvb,
			    offset + SRV_USER_ONL_IP,
			    4,
			    "IP: %s", ip_to_str(ipAddrp));
	proto_tree_add_text(subtree, tvb,
			    offset + SRV_USER_ONL_PORT,
			    4,
			    "Port: %u",
			    tvb_get_letohl(tvb, offset + SRV_USER_ONL_PORT));
	realipAddrp = tvb_get_ptr(tvb, offset + SRV_USER_ONL_REALIP, 4);
	proto_tree_add_text(subtree, tvb,
			    offset + SRV_USER_ONL_REALIP,
			    4,
			    "RealIP: %s", ip_to_str(realipAddrp));
	status = tvb_get_letohs(tvb, offset + SRV_USER_ONL_STATUS);
	proto_tree_add_text(subtree, tvb,
			    offset + SRV_USER_ONL_STATUS,
			    2,
			    "Status: %s", findStatus(status));
	/*
	 * Kojak: Hypothesis is that this field might be an encoding for the
	 * version used by the UIN that changed. To test this, I included
	 * this line to the code.
	 */
	proto_tree_add_text(subtree, tvb,
			    offset + SRV_USER_ONL_X2,
			    4,
			    "Version: %08x",
			    tvb_get_letohl(tvb, offset + SRV_USER_ONL_X2));
    }
}

static void
icqv5_srv_user_offline(proto_tree* tree,/* Tree to put the data in */
		      tvbuff_t *tvb,    /* Tvbuff with packet */
		      int offset,       /* Offset from the start of the packet to the content */
		      int size)         /* Number of chars left to do */
{
    proto_tree* subtree;
    proto_item* ti;

    if (tree) {
	if (size < SRV_USER_OFFLINE_UIN + 4) {
	    ti = proto_tree_add_text(tree,
				     tvb,
				     offset,
				     size,
				     "Body (%d bytes, should be %d)", size,
				     SRV_USER_OFFLINE_UIN + 4);
	    return;
	}
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 SRV_USER_OFFLINE_UIN + 4,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	proto_tree_add_text(subtree, tvb,
			    offset + SRV_USER_OFFLINE_UIN,
			    4,
			    "UIN: %u",
			    tvb_get_letohl(tvb, offset + SRV_USER_OFFLINE));
    }
}

static void
icqv5_srv_multi(proto_tree* tree, /* Tree to put the data in */
		tvbuff_t *tvb,    /* Packet content */
		int offset,       /* Offset from the start of the packet to the content */
		int size,         /* Number of chars left to do */
		packet_info* pinfo)
{
    proto_tree* subtree;
    proto_item* ti;
    guint8 num;
    guint16 pktSz;
    int i;

    if (tree) {
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 size,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	num = tvb_get_guint8(tvb, offset + SRV_MULTI_NUM);
	proto_tree_add_text(subtree, tvb,
			    offset + SRV_MULTI_NUM,
			    1,
			    "Number of pkts: %u", num);
	/*
	 * A sequence of num times ( pktsize, packetData) follows
	 */
	offset += (SRV_MULTI_NUM + 1);
	for (i = 0; i < num; i++) {
	    pktSz = tvb_get_letohs(tvb, offset);
	    offset += 2;
	    dissect_icqv5Server(tvb, offset, pinfo, subtree, pktSz);
	    offset += pktSz;
	}
    }
}

static void
icqv5_srv_meta_user(proto_tree* tree, /* Tree to put the data in */
		    tvbuff_t *tvb,    /* Tvbuff with packet */
		    int offset,       /* Offset from the start of the packet to the content */
		    int size)         /* Number of chars left to do */
{
#if 0
    proto_tree* subtree = NULL;
#endif
    proto_tree* sstree = NULL;
    proto_item* ti = NULL;
    int left = size;
    guint16 subcmd;
    unsigned char result;

    if (tree) {
#if 0
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 size,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	subcmd = tvb_get_letohs(tvb, offset + SRV_META_USER_SUBCMD);
	ti = proto_tree_add_text(subtree, tvb,
				 offset + SRV_META_USER_SUBCMD,
				 2,
				 "%s", findSubCmd(subcmd));
	result = tvb_get_guint8(tvb, offset + SRV_META_USER_RESULT);
	proto_tree_add_text(subtree, tvb,
			    offset + SRV_META_USER_RESULT,
			    1,
			    "%s", (result==0x0a)?"Success":"Failure");
	sstree = proto_item_add_subtree(ti, ett_icq_body_parts);
#else
	subcmd = tvb_get_letohs(tvb, offset + SRV_META_USER_SUBCMD);
	ti = proto_tree_add_text(tree, tvb,
				 offset + SRV_META_USER_SUBCMD,
				 2,
				 "%s", findSubCmd(subcmd));
	sstree = proto_item_add_subtree(ti, ett_icq_body_parts);
	result = tvb_get_guint8(tvb, offset + SRV_META_USER_RESULT);
	proto_tree_add_text(sstree, tvb,
			    offset + SRV_META_USER_RESULT,
			    1,
			    "%s", (result==0x0a)?"Success":"Failure");
#endif

	/* Skip the META_USER header */
	left -= 3;
	offset += 3;

	switch(subcmd) {
	case META_EX_USER_FOUND:
	{
	    /* This is almost the same as META_USER_FOUND,
	     * however, there's an extra length field
	     */
	    guint16 pktLen;

	    /* Read the length field */
	    pktLen = tvb_get_letohs(tvb, offset);
	    proto_tree_add_text(sstree, tvb,
				offset,
				sizeof(guint16),
				"Length: %u", pktLen);

	    offset += sizeof(guint16); left -= sizeof(guint16);
	}
	case META_USER_FOUND:
	{
	    /* The goto mentioned in this block should be local to this
	     * block if C'd allow it.
	     *
	     * They are used to "implement" a poorman's exception handling
	     */
	    int len = 0;
	    char *descr[] = {
		"Nick",
		"First name",
		"Last name",
		"Email",
		NULL};
	    char** d = descr;
	    unsigned char auth;
	    /*
	     * Read UIN
	     */
	    proto_tree_add_text(sstree, tvb,
				offset,
				sizeof(guint32),
				"UIN: %u",
				tvb_get_letohl(tvb, offset));
	    offset+=sizeof(guint32);left-=sizeof(guint32);

	    for ( ; *d!=NULL; d++) {
		len = proto_add_icq_attr(sstree,
					 tvb,
					 offset,
					 *d);
		if (len == -1)
		    return;
		offset += len; left -= len;
	    }
	    /* Get the authorize setting */
	    auth = tvb_get_guint8(tvb, offset);
	    proto_tree_add_text(sstree, tvb,
				offset,
				1,
				"authorization: %s", (auth==0x01)?"Neccessary":"Who needs it");
	    offset++; left--;
	    /* Get x2 */
	    proto_tree_add_text(sstree, tvb,
				offset,
				sizeof(guint16),
				"x2: 0x%04x",
				tvb_get_letohs(tvb, offset));
	    offset+=sizeof(guint16);left-=sizeof(guint16);
	    /* Get x3 */
	    proto_tree_add_text(sstree, tvb,
				offset,
				sizeof(guint32),
				"x3: 0x%08x",
				tvb_get_letohl(tvb, offset));
	    offset+=sizeof(guint32);left-=sizeof(guint32);
	    break;
	}
	case META_ABOUT:
	{
	    int len;

	    /* Get the about information */
	    len = tvb_get_letohs(tvb, offset);
	    offset+=sizeof(guint16);left-=sizeof(guint16);
	    proto_tree_add_text(sstree, tvb,
				offset - sizeof(guint16),
				sizeof(guint16)+len,
				"About(%d): %.*s", len,
				len, tvb_get_ptr(tvb, offset, len));
	    offset+=len;left-=len;
	    break;
	}
	case META_USER_INFO:
	{
	    /* The goto mentioned in this block should be local to this
	     * block if C'd allow it.
	     *
	     * They are used to "implement" a poorman's exception handling
	     */
	    static const char* descr[] = {
		"Nick",
		"First name",
		"Last name",
		"Primary email",
		"Secundary email",
		"Old email",
		"City",
		"State",
		"Phone",
		"Fax",
		"Street",
		"Cellphone",
		"Zip",
		NULL};
	    const char** d = descr;
	    guint16 country;
	    guint8 user_timezone;
	    guint8 auth;
	    int len = 0;
#if 0
	    /* Get the uin */
	    uin = tvb_get_letohl(tvb, offset);
	    proto_tree_add_text(sstree, tvb,
				offset,
				sizeof(guint32),
				"UIN: %u", uin);
	    offset+=sizeof(guint32);left-=sizeof(guint32);
#endif

	    /*
	     * Get every field from the description
	     */
	    while ((*d)!=NULL) {
		len = tvb_get_letohs(tvb, offset);
		offset+=sizeof(guint16);left-=sizeof(guint16);
		if (len>0) {
		    proto_tree_add_text(sstree, tvb,
					offset - sizeof(guint16),
					sizeof(guint16)+len,
					"%s(%d): %.*s",*d, len,
					len - 1,
					tvb_get_ptr(tvb, offset, len - 1));
		    offset+=len;left-=len;
		}
		d++;
	    }
	    /* Get country code */
	    country = tvb_get_letohs(tvb, offset);
	    proto_tree_add_text(sstree, tvb,
				offset,
				sizeof(guint16),
				"Countrycode: %u", country);
	    offset+=sizeof(guint16); left-=sizeof(guint16);
	    /* Get the timezone setting */
	    user_timezone = tvb_get_guint8(tvb, offset);
	    proto_tree_add_text(sstree, tvb,
				offset,
				sizeof(unsigned char),
				"Timezone: %u", user_timezone);
	    offset++; left--;
	    /* Get the authorize setting */
	    auth = tvb_get_guint8(tvb, offset);
	    proto_tree_add_text(sstree, tvb,
				offset,
				sizeof(unsigned char),
				"Authorization: (%u) %s",
				auth, (auth==0)?"No":"Yes");
	    offset++; left--;
	    /* Get the webaware setting */
	    auth = tvb_get_guint8(tvb, offset);
	    proto_tree_add_text(sstree, tvb,
				offset,
				sizeof(unsigned char),
				"Webaware: (%u) %s",
				auth, (auth==0)?"No":"Yes");
	    offset++; left--;
	    /* Get the authorize setting */
	    auth = tvb_get_guint8(tvb, offset);
	    proto_tree_add_text(sstree, tvb,
				offset,
				sizeof(unsigned char),
				"HideIP: (%u) %s",
				auth, (auth==0)?"No":"Yes");
	    offset++; left--;
	    break;
	}
	default:
	    /* This information is already printed in the tree */
	    fprintf(stderr, "Meta subcmd: %04x\n", subcmd);
	    break;
	}
    }
}

static void
icqv5_srv_recv_message(proto_tree* tree, /* Tree to put the data in */
		       tvbuff_t* tvb,    /* Packet content */
		       int offset,       /* Offset from the start of the packet to the content */
		       int size)         /* Number of chars left to do */
{
    proto_tree* subtree = NULL;
    proto_item* ti = NULL;
    int left = size;
    guint16 year;
    guint8 month;
    guint8 day;
    guint8 hour;
    guint8 minute;

    if (tree) {
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 4,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	proto_tree_add_item(subtree,
				   hf_icq_uin,
				   tvb,
				   offset + SRV_RECV_MSG_UIN,
				   sizeof(guint32),
				   TRUE);
	year = tvb_get_letohs(tvb, offset + SRV_RECV_MSG_YEAR);
	month = tvb_get_guint8(tvb, offset + SRV_RECV_MSG_MONTH);
	day = tvb_get_guint8(tvb, offset + SRV_RECV_MSG_DAY);
	hour = tvb_get_guint8(tvb, offset + SRV_RECV_MSG_HOUR);
	minute = tvb_get_guint8(tvb, offset + SRV_RECV_MSG_MINUTE);

	proto_tree_add_text(subtree, tvb,
			    offset + SRV_RECV_MSG_YEAR,
			    sizeof(guint16) + 4*sizeof(unsigned char),
			    "Time: %u-%u-%u %02u:%02u",
			    day, month, year, hour, minute);
	icqv5_decode_msgType(subtree,
			     tvb,
			     offset + SRV_RECV_MSG_MSG_TYPE,
			     left);
    }
}

static void
icqv5_srv_rand_user(proto_tree* tree,      /* Tree to put the data in */
		    tvbuff_t *tvb,         /* Tvbuff with packet */
		    int offset)            /* Offset from the start of the packet to the content */
{
    proto_tree* subtree = NULL;
    proto_item* ti = NULL;
    guint32 uin;
    const unsigned char* IP = NULL;
    guint32 port;
    const unsigned char* realIP = NULL;
    guint8 commClass;
    guint32 status;
    guint16 tcpVer;

    if (tree) {
	ti = proto_tree_add_text(tree,
				 tvb,
				 offset,
				 SRV_RAND_USER_TCP_VER + 2,
				 "Body");
	subtree = proto_item_add_subtree(ti, ett_icq_body);
	/* guint32 UIN */
	uin = tvb_get_letohl(tvb, offset + SRV_RAND_USER_UIN);
	proto_tree_add_text(subtree, tvb,
			    offset + SRV_RAND_USER_UIN,
			    sizeof(guint32),
			    "UIN: %u", uin);
	/* guint32 IP */
	IP = tvb_get_ptr(tvb, offset + SRV_RAND_USER_IP, 4);
	proto_tree_add_text(subtree, tvb,
			    offset + SRV_RAND_USER_IP,
			    sizeof(guint32),
			    "IP: %s",
			    ip_to_str(IP));
	/* guint16 portNum */
	/* XXX - 16 bits, or 32 bits? */
	port = tvb_get_letohs(tvb, offset + SRV_RAND_USER_PORT);
	proto_tree_add_text(subtree, tvb,
			    offset + SRV_RAND_USER_UIN,
			    sizeof(guint32),
			    "Port: %u", port);
	/* guint32 realIP */
	realIP = tvb_get_ptr(tvb, offset + SRV_RAND_USER_REAL_IP, 4);
	proto_tree_add_text(subtree, tvb,
			    offset + SRV_RAND_USER_REAL_IP,
			    sizeof(guint32),
			    "RealIP: %s", ip_to_str(realIP));
	/* guint8 Communication Class */
	commClass = tvb_get_guint8(tvb, offset + SRV_RAND_USER_CLASS);
	proto_tree_add_text(subtree, tvb,
			    offset + SRV_RAND_USER_CLASS,
			    sizeof(guint8),
			    "Class: %s", (commClass!=4)?"User to User":"Through Server");
	/* guint32 status */
	/* XXX - 16 bits, or 32 bits? */
	status = tvb_get_letohs(tvb, offset + SRV_RAND_USER_STATUS);
	proto_tree_add_text(subtree, tvb,
			    offset + SRV_RAND_USER_STATUS,
			    sizeof(guint32),
			    "Status: %s", findStatus(status));
	/* guint16 tcpVersion */
	tcpVer = tvb_get_letohs(tvb, offset + SRV_RAND_USER_TCP_VER);
	proto_tree_add_text(subtree, tvb,
			    offset + SRV_RAND_USER_TCP_VER,
			    sizeof(guint16),
			    "TCPVersion: %u", tcpVer);
    }
}

/*
 * Dissect all the v5 client traffic. This is encrypted, so be careful.
 */
static void
dissect_icqv5Client(tvbuff_t *tvb,
		    packet_info *pinfo,
		    proto_tree *tree)
{
    proto_tree *icq_tree = NULL;
    proto_tree *icq_header_tree = NULL;
    proto_item *ti = NULL;

    int pktsize;		/* The actual size of the ICQ content */
    int capturedsize;		/* The captured size of the ICQ content */
    guint32 rounded_size;
    guint32 key;
    guint16 cmd;
    guint8 *decr_pd;		/* Decrypted content */
    tvbuff_t *decr_tvb;

    pktsize = tvb_reported_length(tvb);
    capturedsize = tvb_length(tvb);

    /* Get the encryption key */
    key = get_v5key(tvb, pktsize);

    /*
     * Make a copy of the packet data, and decrypt it.
     * The decryption processes 4 bytes at a time, and starts at
     * an offset of ICQ5_CL_SESSIONID (which isn't a multiple of 4),
     * so we make sure that there are
     *
     *	(ICQ5_CL_SESSIONID + a multiple of 4)
     *
     * bytes in the buffer.
     */
    rounded_size = ((((capturedsize - ICQ5_CL_SESSIONID) + 3)/4)*4) + ICQ5_CL_SESSIONID;
    decr_pd = g_malloc(rounded_size);
    tvb_memcpy(tvb, decr_pd, 0, capturedsize);
    decrypt_v5(decr_pd, rounded_size, key);

    /* Allocate a new tvbuff, referring to the decrypted data. */
    decr_tvb = tvb_new_real_data(decr_pd, capturedsize, pktsize);

    /* Arrange that the allocated packet data copy be freed when the
       tvbuff is freed. */
    tvb_set_free_cb(decr_tvb, g_free);

    /* Add the tvbuff to the list of tvbuffs to which the tvbuff we
       were handed refers, so it'll get cleaned up when that tvbuff
       is cleaned up. */
    tvb_set_child_real_data_tvbuff(tvb, decr_tvb);

    /* Add the decrypted data to the data source list. */
    add_new_data_source(pinfo, decr_tvb, "Decrypted");

    cmd = tvb_get_letohs(decr_tvb, ICQ5_CL_CMD);

    if (check_col(pinfo->cinfo, COL_INFO))
        col_add_fstr(pinfo->cinfo, COL_INFO, "ICQv5 %s", findClientCmd(cmd));

    if (tree) {
        ti = proto_tree_add_protocol_format(tree,
				 proto_icq,
				 tvb,
				 0,
				 -1,
				 "ICQv5 %s (len %u)",
				 findClientCmd(cmd),
				 pktsize);
        icq_tree = proto_item_add_subtree(ti, ett_icq);
	ti = proto_tree_add_uint_format(icq_tree,
					hf_icq_type,
					tvb,
					0,
					ICQ5_CL_HDRSIZE,
					ICQ5_client,
					"Header");
	icq_header_tree = proto_item_add_subtree(ti, ett_icq_header);

	proto_tree_add_text(icq_header_tree, tvb,
			    ICQ_VERSION,
			    2,
			    "Version: %u",
			    tvb_get_letohs(tvb, ICQ_VERSION));
	proto_tree_add_item(icq_header_tree,
			    hf_icq_uin,
			    tvb,
			    ICQ5_CL_UIN,
			    4,
			    TRUE);
	proto_tree_add_item(icq_header_tree,
			    hf_icq_sessionid,
			    decr_tvb,
			    ICQ5_CL_SESSIONID,
			    4,
			    TRUE);
	proto_tree_add_uint_format(icq_header_tree,
			    hf_icq_client_cmd,
			    decr_tvb,
			    ICQ5_CL_CMD,
			    2,
			    cmd,
			    "Command: %s (%u)",
			    val_to_str(cmd, clientCmdCode, "Unknown"), cmd);
	proto_tree_add_text(icq_header_tree, decr_tvb,
			    ICQ5_CL_SEQNUM1,
			    2,
			    "Seq Number 1: 0x%04x",
			    tvb_get_letohs(decr_tvb, ICQ5_CL_SEQNUM1));
	proto_tree_add_text(icq_header_tree, decr_tvb,
			    ICQ5_CL_SEQNUM2,
			    2,
			    "Seq Number 2: 0x%04x",
			    tvb_get_letohs(decr_tvb, ICQ5_CL_SEQNUM2));
	proto_tree_add_uint_format(icq_header_tree,
				   hf_icq_checkcode,
				   tvb,
				   ICQ5_CL_CHECKCODE,
				   4,
				   key,
				   "Key: 0x%08x",
				   key);
	switch(cmd) {
	case CMD_ACK:
	    icqv5_cmd_ack(icq_tree,
			  decr_tvb,
			  ICQ5_CL_HDRSIZE);
	    break;
	case CMD_SEND_MSG:
	case CMD_MSG_TO_NEW_USER:
	    icqv5_cmd_send_msg(icq_tree,
			       decr_tvb,
			       ICQ5_CL_HDRSIZE,
			       pktsize - ICQ5_CL_HDRSIZE);
	    break;
	case CMD_RAND_SEARCH:
	    icqv5_cmd_rand_search(icq_tree,
				  decr_tvb,
				  ICQ5_CL_HDRSIZE,
				  pktsize - ICQ5_CL_HDRSIZE);
	    break;
	case CMD_LOGIN:
	    icqv5_cmd_login(icq_tree,
			    decr_tvb,
			    ICQ5_CL_HDRSIZE,
			    pktsize - ICQ5_CL_HDRSIZE);
	    break;
	case CMD_SEND_TEXT_CODE:
	    icqv5_cmd_send_text_code(icq_tree,
				     decr_tvb,
				     ICQ5_CL_HDRSIZE,
				     pktsize - ICQ5_CL_HDRSIZE);
	    break;
	case CMD_STATUS_CHANGE:
	    icqv5_cmd_status_change(icq_tree,
				    decr_tvb,
				    ICQ5_CL_HDRSIZE);
	    break;
	case CMD_ACK_MESSAGES:
	    icqv5_cmd_ack_messages(icq_tree,
				   decr_tvb,
				   ICQ5_CL_HDRSIZE);
	    break;
	case CMD_KEEP_ALIVE:
	    icqv5_cmd_keep_alive(icq_tree,
				 decr_tvb,
				 ICQ5_CL_HDRSIZE);
	    break;
	case CMD_ADD_TO_LIST:
	    icqv5_cmd_add_to_list(icq_tree,
				   decr_tvb,
				   ICQ5_CL_HDRSIZE);
	    break;
	case CMD_CONTACT_LIST:
	    icqv5_cmd_contact_list(icq_tree,
				   decr_tvb,
				   ICQ5_CL_HDRSIZE,
				   pktsize - ICQ5_CL_HDRSIZE);
	    break;
	case CMD_META_USER:
	case CMD_REG_NEW_USER:
	case CMD_QUERY_SERVERS:
	case CMD_QUERY_ADDONS:
	    icqv5_cmd_no_params(icq_tree,
				decr_tvb,
				ICQ5_CL_HDRSIZE);
	    break;
	default:
	    proto_tree_add_text(icq_tree,
	    			decr_tvb,
				ICQ5_CL_HDRSIZE,
				pktsize - ICQ5_CL_HDRSIZE,
				"Body");
	    fprintf(stderr,"Missing: %s\n", findClientCmd(cmd));
	    break;
	}
    }
}

static void
dissect_icqv5Server(tvbuff_t *tvb,
		    int offset,
		    packet_info *pinfo,
		    proto_tree *tree,
		    int pktsize)
{
    /* Server traffic is easy, not encrypted */
    proto_tree *icq_tree = NULL;
    proto_tree *icq_header_tree = NULL;
    proto_item *ti = NULL;
    int changeCol = (pktsize==-1);

    guint16 cmd;

    cmd = tvb_get_letohs(tvb, offset + ICQ5_SRV_CMD);
    if (changeCol && check_col(pinfo->cinfo, COL_INFO))
	col_add_fstr(pinfo->cinfo, COL_INFO, "ICQv5 %s", findServerCmd(cmd));

    if (pktsize == -1)
	pktsize = tvb_reported_length(tvb);

    if (tree) {
        ti = proto_tree_add_protocol_format(tree,
					proto_icq,
					tvb,
					offset,
					pktsize,
					"ICQv5 %s (len %u)",
					findServerCmd(cmd),
					pktsize);

        icq_tree = proto_item_add_subtree(ti, ett_icq);

	ti = proto_tree_add_uint_format(icq_tree,
					hf_icq_type,
					tvb,
					offset,
					ICQ5_SRV_HDRSIZE,
					ICQ5_server,
					"Header");
	icq_header_tree = proto_item_add_subtree(ti, ett_icq_header);

	proto_tree_add_text(icq_header_tree, tvb,
			    offset + ICQ_VERSION,
			    2,
			    "Version: %u",
			    tvb_get_letohs(tvb, ICQ_VERSION));
	proto_tree_add_item(icq_header_tree,
			    hf_icq_sessionid,
			    tvb,
			    offset + ICQ5_SRV_SESSIONID,
			    4,
			    TRUE);
	proto_tree_add_uint_format(icq_header_tree,
			    hf_icq_server_cmd,
			    tvb,
			    offset + ICQ5_SRV_CMD,
			    2,
			    cmd,
			    "Command: %s (%u)",
			    val_to_str(cmd, serverCmdCode, "Unknown"), cmd);
	proto_tree_add_text(icq_header_tree, tvb,
			    offset + ICQ5_SRV_SEQNUM1,
			    2,
			    "Seq Number 1: 0x%04x",
			    tvb_get_letohs(tvb, offset + ICQ5_SRV_SEQNUM1));
	proto_tree_add_text(icq_header_tree, tvb,
			    offset + ICQ5_SRV_SEQNUM2,
			    2,
			    "Seq Number 2: 0x%04x",
			    tvb_get_letohs(tvb, offset + ICQ5_SRV_SEQNUM2));
	proto_tree_add_item(icq_header_tree,
			    hf_icq_uin,
			    tvb,
			    offset + ICQ5_SRV_UIN,
			    4,
			    TRUE);
	proto_tree_add_item(icq_header_tree,
			    hf_icq_checkcode,
			    tvb,
			    offset + ICQ5_SRV_CHECKCODE,
			    4,
			    TRUE);
	switch (cmd) {
	case SRV_RAND_USER:
	    icqv5_srv_rand_user(icq_tree,
			       tvb,
			       offset + ICQ5_SRV_HDRSIZE);
	    break;
	case SRV_SYS_DELIVERED_MESS:
	    /* The message structures are all the same. Why not run
	     * the same routine? */
	    icqv5_cmd_send_msg(icq_tree,
			       tvb,
			       offset + ICQ5_SRV_HDRSIZE,
			       pktsize - ICQ5_SRV_HDRSIZE);
	    break;
	case SRV_USER_ONLINE:
	    icqv5_srv_user_online(icq_tree,
			       tvb,
			       offset + ICQ5_SRV_HDRSIZE,
			       pktsize - ICQ5_SRV_HDRSIZE);
	    break;
	case SRV_USER_OFFLINE:
	    icqv5_srv_user_offline(icq_tree,
			       tvb,
			       offset + ICQ5_SRV_HDRSIZE,
			       pktsize - ICQ5_SRV_HDRSIZE);
	    break;
	case SRV_LOGIN_REPLY:
	    icqv5_srv_login_reply(icq_tree,
			       tvb,
			       offset + ICQ5_SRV_HDRSIZE,
			       pktsize - ICQ5_SRV_HDRSIZE);
	    break;
	case SRV_META_USER:
	    icqv5_srv_meta_user(icq_tree,
			       tvb,
			       offset + ICQ5_SRV_HDRSIZE,
			       pktsize - ICQ5_SRV_HDRSIZE);
	    break;
	case SRV_RECV_MESSAGE:
	    icqv5_srv_recv_message(icq_tree,
				   tvb,
				   offset + ICQ5_SRV_HDRSIZE,
				   pktsize - ICQ5_SRV_HDRSIZE);
	    break;
	case SRV_MULTI:
	    icqv5_srv_multi(icq_tree,
			    tvb,
			    offset + ICQ5_SRV_HDRSIZE,
			    pktsize - ICQ5_SRV_HDRSIZE,
			    pinfo);
	    break;
	case SRV_ACK:
	case SRV_SILENT_TOO_LONG:
	case SRV_GO_AWAY:
	case SRV_NEW_UIN:
	case SRV_BAD_PASS:
	case SRV_UPDATE_SUCCESS:
	    icqv5_srv_no_params(icq_tree,
	    			tvb,
				offset + ICQ5_SRV_HDRSIZE);
	    break;
	default:
	    proto_tree_add_text(icq_tree,
	    			tvb,
				offset + ICQ5_SRV_HDRSIZE,
				pktsize - ICQ5_SRV_HDRSIZE,
				"Body");
	    fprintf(stderr,"Missing: %s\n", findServerCmd(cmd));
	    break;
	}
    }
}

static void dissect_icqv5(tvbuff_t *tvb,
			  packet_info *pinfo,
			  proto_tree *tree)
{
  guint32 unknown;

  if (check_col(pinfo->cinfo, COL_PROTOCOL))
      col_set_str(pinfo->cinfo, COL_PROTOCOL, "ICQv5 (UDP)");
  if (check_col(pinfo->cinfo, COL_INFO))
      col_set_str(pinfo->cinfo, COL_INFO, "ICQv5 packet");

  unknown = tvb_get_letohl(tvb, ICQ5_UNKNOWN);

  if (unknown == 0x0L) {
      dissect_icqv5Client(tvb, pinfo, tree);
  } else {
      dissect_icqv5Server(tvb, 0, pinfo, tree, -1);
  }
}

static void dissect_icq(tvbuff_t *tvb,
			packet_info *pinfo,
			proto_tree *tree)
{
  int version;

  if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
    col_set_str(pinfo->cinfo, COL_PROTOCOL, "ICQ");
  }
  if (check_col(pinfo->cinfo, COL_INFO)) {
    col_clear(pinfo->cinfo, COL_INFO);
  }

  version = tvb_get_letohs(tvb, ICQ_VERSION);
  switch (version) {
  case 0x0005:
      dissect_icqv5(tvb, pinfo, tree);
      break;
  case 0x0004:
      dissect_icqv4(tvb, pinfo, tree);
      break;
  case 0x0003:
      dissect_icqv3(tvb, pinfo, tree);
      break;
  case 0x0002:
      dissect_icqv2(tvb, pinfo, tree);
      break;
  default:
      fprintf(stderr, "ICQ: Unknown version (%d)\n", version);
      break;
  }
}

/* registration with the filtering engine */
void
proto_register_icq(void)
{
    static hf_register_info hf[] = {
	{ &hf_icq_type,
	  {"Type", "icq.type", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
	{ &hf_icq_uin,
	  {"UIN", "icq.uin", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
	{ &hf_icq_sessionid,
	  {"Session ID", "icq.sessionid", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL }},
	{ &hf_icq_client_cmd,
	  {"Client command", "icq.client_cmd", FT_UINT16, BASE_HEX, VALS(clientCmdCode), 0x0, "", HFILL }},
	{ &hf_icq_server_cmd,
	  {"Server command", "icq.server_cmd", FT_UINT16, BASE_DEC, VALS(serverCmdCode), 0x0, "", HFILL }},
	{ &hf_icq_checkcode,
	  {"Checkcode", "icq.checkcode", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL }},
	{ &hf_icq_decode,
	  {"Decode", "icq.decode", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }}
    };
    static gint *ett[] = {
        &ett_icq,
        &ett_icq_header,
        &ett_icq_decode,
        &ett_icq_body,
        &ett_icq_body_parts,
    };

    proto_icq = proto_register_protocol("ICQ Protocol", "ICQ", "icq");

    proto_register_field_array(proto_icq, hf, array_length(hf));

    proto_register_subtree_array(ett, array_length(ett));
}

void
proto_reg_handoff_icq(void)
{
    dissector_handle_t icq_handle;

    icq_handle = create_dissector_handle(dissect_icq, proto_icq);
    dissector_add("udp.port", UDP_PORT_ICQ, icq_handle);
}