aboutsummaryrefslogtreecommitdiffstats
path: root/packet-srvloc.c
blob: e0807c6fb0d829db3feb795719cad61fa9077f95 (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
/* packet-srvloc.c
 * Routines for SRVLOC (Service Location Protocol) packet dissection
 * Copyright 1999, James Coe <jammer@cin.net>
 * Copyright 2002, Brad Hards
 * Updated for TCP segments by Greg Morris <gmorris@novell.com>
 * Copyright 2003, Greg Morris
 *
 * NOTE: This is Alpha software not all features have been verified yet.
 *       In particular I have not had an opportunity to see how it
 *       responds to SRVLOC over TCP.
 *
 * $Id: packet-srvloc.c,v 1.43 2003/10/01 21:15:45 guy Exp $
 *
 * Ethereal - Network traffic analyzer
 * By Gerald Combs <gerald@ethereal.com>
 * Copyright 1998 Gerald Combs
 *
 * Service Location Protocol is RFC 2165
 * Service Location Protocol Version 2 is RFC 2608
 *   - partial support by Brad Hards <bradh@frogmouth.net>
 *
 * 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.
 */

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

#include <stdio.h>
#include <stdlib.h>

#include <string.h>
#include <time.h>
#include <glib.h>

#include <epan/packet.h>
#include <epan/strutil.h>
#include "prefs.h"
#include "packet-tcp.h"
#include "reassemble.h"

static gboolean srvloc_desegment = TRUE;
static int proto_srvloc = -1;
static int hf_srvloc_version = -1;
static int hf_srvloc_function = -1;
static int hf_srvloc_pktlen = -1;
static int hf_srvloc_xid = -1;
static int hf_srvloc_langtaglen = -1;
static int hf_srvloc_langtag = -1;
static int hf_srvloc_nextextoff = -1;
static int hf_srvloc_flags_v1 = -1;
static int hf_srvloc_flags_v1_overflow = -1;
static int hf_srvloc_flags_v1_monolingual = -1;
static int hf_srvloc_flags_v1_url_auth = -1;
static int hf_srvloc_flags_v1_attribute_auth = -1;
static int hf_srvloc_flags_v1_fresh = -1;
static int hf_srvloc_error = -1;
static int hf_srvloc_flags_v2 = -1;
static int hf_srvloc_flags_v2_overflow = -1;
static int hf_srvloc_flags_v2_fresh = -1;
static int hf_srvloc_flags_v2_reqmulti = -1;
static int hf_srvloc_error_v2 = -1;
static int hf_srvloc_daadvert_timestamp = -1;
static int hf_srvloc_daadvert_urllen = -1;
static int hf_srvloc_daadvert_url = -1;
static int hf_srvloc_daadvert_scopelistlen = -1;
static int hf_srvloc_daadvert_scopelist = -1;
static int hf_srvloc_daadvert_attrlistlen = -1;
static int hf_srvloc_daadvert_attrlist = -1;
static int hf_srvloc_daadvert_slpspilen = -1;
static int hf_srvloc_daadvert_slpspi = -1;
static int hf_srvloc_daadvert_authcount = -1;
static int hf_srvloc_srvreq_prlistlen = -1;
static int hf_srvloc_srvreq_prlist = -1;
static int hf_srvloc_srvreq_srvtypelen = -1;
static int hf_srvloc_srvreq_srvtypelist = -1;
static int hf_srvloc_srvreq_scopelistlen = -1;
static int hf_srvloc_srvreq_scopelist = -1;
static int hf_srvloc_srvreq_predicatelen = -1;
static int hf_srvloc_srvreq_predicate = -1;
static int hf_srvloc_srvreq_slpspilen = -1;
static int hf_srvloc_srvreq_slpspi = -1;
static int hf_srvloc_srvrply_urlcount = -1;
static int hf_srvloc_srvreg_attrlistlen = -1;
static int hf_srvloc_srvreg_attrlist = -1;
static int hf_srvloc_srvreg_attrauthcount = -1;
static int hf_srvloc_srvreg_srvtypelen = -1;
static int hf_srvloc_srvreg_srvtype = -1;
static int hf_srvloc_srvreg_scopelistlen = -1;
static int hf_srvloc_srvreg_scopelist = -1;
static int hf_srvloc_srvdereg_scopelistlen = -1;
static int hf_srvloc_srvdereg_scopelist = -1;
static int hf_srvloc_srvdereg_taglistlen = -1;
static int hf_srvloc_srvdereg_taglist = -1;
static int hf_srvloc_attrreq_prlistlen  = -1;
static int hf_srvloc_attrreq_prlist  = -1;
static int hf_srvloc_attrreq_urllen  = -1;
static int hf_srvloc_attrreq_url  = -1;
static int hf_srvloc_attrreq_scopelistlen  = -1;
static int hf_srvloc_attrreq_scopelist  = -1;
static int hf_srvloc_attrreq_attrlistlen = -1;
static int hf_srvloc_attrreq_attrlist = -1;
static int hf_srvloc_attrreq_taglistlen  = -1;
static int hf_srvloc_attrreq_taglist  = -1;
static int hf_srvloc_attrreq_slpspilen = -1;
static int hf_srvloc_attrreq_slpspi = -1;
static int hf_srvloc_attrrply_attrlistlen = -1;
static int hf_srvloc_attrrply_attrlist = -1;
static int hf_srvloc_attrrply_attrauthcount = -1;
static int hf_srvloc_srvtypereq_prlistlen = -1;
static int hf_srvloc_srvtypereq_prlist = -1;
static int hf_srvloc_srvtypereq_nameauthlistlen = -1;
static int hf_srvloc_srvtypereq_nameauthlistlenall = -1;
static int hf_srvloc_srvtypereq_nameauthlist = -1;
static int hf_srvloc_srvtypereq_scopelistlen = -1;
static int hf_srvloc_srvtypereq_scopelist = -1;
static int hf_srvloc_srvtyperply_srvtypelen = -1;
static int hf_srvloc_srvtyperply_srvtype = -1;
static int hf_srvloc_srvtyperply_srvtypelistlen = -1;
static int hf_srvloc_srvtyperply_srvtypelist = -1;
static int hf_srvloc_saadvert_urllen = -1;
static int hf_srvloc_saadvert_url = -1;
static int hf_srvloc_saadvert_scopelistlen = -1;
static int hf_srvloc_saadvert_scopelist = -1;
static int hf_srvloc_saadvert_attrlistlen = -1;
static int hf_srvloc_saadvert_attrlist = -1;
static int hf_srvloc_saadvert_authcount = -1;
static int hf_srvloc_authblkv2_bsd = -1;
static int hf_srvloc_authblkv2_len = -1;
static int hf_srvloc_authblkv2_timestamp = -1;
static int hf_srvloc_authblkv2_slpspilen = -1;
static int hf_srvloc_authblkv2_slpspi = -1;
static int hf_srvloc_url_reserved = -1;
static int hf_srvloc_url_lifetime = -1;
static int hf_srvloc_url_urllen = -1;
static int hf_srvloc_url_url = -1;
static int hf_srvloc_url_numauths = -1;


static gint ett_srvloc = -1;
static gint ett_srvloc_flags = -1;


static const true_false_string tfs_srvloc_flags_overflow = {
    "Message will not fit in datagram",
    "Message will fit in a datagram"
};
static const true_false_string tfs_srvloc_flags_v1_monolingual = {
    "Only responses in specified language will be accepted",
    "Responses in any language will be accepted"
};
static const true_false_string tfs_srvloc_flags_v1_url_auth = {
    "URL Authentication Block is present",
    "URL Authentication Block is absent"
};
static const true_false_string tfs_srvloc_flags_v1_attribute_auth = {
    "Attribute Authentication Block is present",
    "Attribute Authentication Block is absent"
};
static const true_false_string tfs_srvloc_flags_fresh = {
    "New Service Registration",
    "Not a new Service Registration"
};
static const true_false_string tfs_srvloc_flags_v2_reqmulti = {
    "Multicast (or broadcast) request",
    "Not multicast or broadcast"
};


#define TCP_PORT_SRVLOC	427
#define UDP_PORT_SRVLOC	427

/* Define function types */

#define SRVREQ		1
#define SRVRPLY		2
#define SRVREG		3
#define SRVDEREG	4
#define SRVACK		5
#define ATTRRQST	6
#define ATTRRPLY	7
#define DAADVERT	8
#define SRVTYPERQST	9
#define	SRVTYPERPLY	10
#define SAADVERT        11 /* SLPv2, section 8 */

/* Create protocol header structure */

/* bradh: looks like never used. */
/* bradh: comment it out for now since it doesn't work for v2
struct srvloc_hdr {
    guint8	version;
    guint8	function;
    guint16	length;
    guint8	flags;
    guint8	dialect;
    guchar	language[2];
    guint16	encoding;
    guint16	xid;
};
*/

/* List to resolve function numbers to names */

static const value_string srvloc_functions[] = {
    { SRVREQ, "Service Request" },
    { SRVRPLY, "Service Reply" },
    { SRVREG, "Service Registration" },
    { SRVDEREG, "Service Deregister" },
    { SRVACK, "Service Acknowledge" },
    { ATTRRQST, "Attribute Request" },
    { ATTRRPLY, "Attribute Reply" },
    { DAADVERT, "DA Advertisement" },
    { SRVTYPERQST, "Service Type Request" },
    { SRVTYPERPLY, "Service Type Reply" },
    { SAADVERT, "SA Advertisement" }, /* v2 only */
    { 0, NULL }
};

/* List to resolve flag values to names */


/* Define flag masks */

#define FLAG_O		0x80
#define FLAG_M		0x40
#define FLAG_U		0x20
#define FLAG_A		0x10
#define FLAG_F		0x08

/* it all changes for Version 2 */
#define FLAG_O_V2       0x8000
#define FLAG_F_V2       0x4000
#define FLAG_R_V2       0x2000

/* Define Error Codes  - Version 1*/

#define SUCCESS		0
#define LANG_NOT_SPTD	1
#define PROT_PARSE_ERR	2
#define INVLD_REG	3
#define SCOPE_NOT_SPTD	4
#define CHRSET_NOT_UND	5
#define AUTH_ABSENT	6
#define AUTH_FAILED	7

/* List to resolve error codes to names */

static const value_string srvloc_errs[] = {
    { SUCCESS, "No Error" },
    { LANG_NOT_SPTD, "Language not supported" },
    { PROT_PARSE_ERR, "Protocol parse error" },
    { INVLD_REG, "Invalid registration" },
    { SCOPE_NOT_SPTD, "Scope not supported" },
    { CHRSET_NOT_UND, "Character set not understood" },
    { AUTH_ABSENT, "Authentication absent" },
    { AUTH_FAILED, "Authentication failed" },
    { 0, NULL }
};

/* Define Error Codes for Version 2 */

#define LANGUAGE_NOT_SUPPORTED 	1 
#define PARSE_ERROR 		2
#define INVALID_REGISTRATION	3
#define SCOPE_NOT_SUPPORTED	4
#define AUTHENTICATION_UNKNOWN	5
#define AUTHENTICATION_ABSENT	6
#define AUTHENTICATION_FAILED	7
#define VER_NOT_SUPPORTED	9
#define INTERNAL_ERROR		10
#define DA_BUSY_NOW		11
#define OPTION_NOT_UNDERSTOOD	12
#define INVALID_UPDATE		13
#define MSG_NOT_SUPPORTED	14
#define REFRESH_REJECTED	15

static const value_string srvloc_errs_v2[] = {
    { SUCCESS, "No Error" },
    { LANGUAGE_NOT_SUPPORTED, "No data in the requested language" },
    { PARSE_ERROR, "The message fails to obey SLP syntax." },
    { INVALID_REGISTRATION, "The SrvReg has problems" },
    { SCOPE_NOT_SUPPORTED, "Scope list not supported" },
    { AUTHENTICATION_UNKNOWN, "Unsupported SLP SPI." },
    { AUTHENTICATION_ABSENT, "URL and ATTR authentication not provided"},
    { AUTHENTICATION_FAILED, "Authentication error"},
    { VER_NOT_SUPPORTED, "Unsupported version number in message header" },
    { INTERNAL_ERROR, "The DA (or SA) is too sick to respond" },
    { DA_BUSY_NOW, "UA or SA SHOULD retry" },
    { OPTION_NOT_UNDERSTOOD, "Unknown option from the mandatory range"},
    { INVALID_UPDATE, "Invalid SrvReg" },
    { MSG_NOT_SUPPORTED, "No support for AttrRqst or SrvTypeRqst" },
    { REFRESH_REJECTED, "SrvReg sent too soon"},
    { 0, NULL }
};

/*
 * Character encodings.
 * This is a small subset of what's in
 *
 *	http://www.isi.edu/in-notes/iana/assignments/character-sets
 *
 * XXX - we should do something useful with this, i.e. properly
 * handle strings based on the character set they're in.
 *
 * XXX - what does "properly handle strings" mean?  How do we know
 * what character set the terminal can handle (for tty-based code)
 * or the GUI can handle (for GUI code)?
 *
 * XXX - the Ethereal core really should be what does all the
 * character set handling for strings, and it should be stuck with
 * the task of figuring out how to properly handle them.
 */
#define CHARSET_ASCII		3
#define CHARSET_ISO_10646_UTF_1	27
#define CHARSET_ISO_646_BASIC	28
#define CHARSET_ISO_646_IRV	30
#define CHARSET_ISO_8859_1	4
#define CHARSET_ISO_10646_UCS_2	1000	/* a/k/a Unicode */
#define CHARSET_UTF_7		1012
#define CHARSET_UTF_8		106

static const value_string charsets[] = {
	{ CHARSET_ASCII, "US-ASCII" },
	{ CHARSET_ISO_10646_UTF_1, "ISO 10646 UTF-1" },
	{ CHARSET_ISO_646_BASIC, "ISO 646 basic:1983" },
	{ CHARSET_ISO_646_IRV, "ISO 646 IRV:1983" },
	{ CHARSET_ISO_8859_1, "ISO 8859-1" },
	{ CHARSET_ISO_10646_UCS_2, "Unicode" },
	{ CHARSET_UTF_7, "UTF-7" },
	{ CHARSET_UTF_8, "UTF-8" },
	{ 0, NULL }
};

static int
dissect_authblk(tvbuff_t *tvb, int offset, proto_tree *tree)
{
    struct tm 	*stamp;
    time_t 	seconds;
    double 	floatsec;
    guint16 	length;

    seconds = tvb_get_ntohl(tvb, offset) - 2208988800ul;
    stamp = gmtime(&seconds);
    if (stamp != NULL) {
      floatsec = stamp->tm_sec + tvb_get_ntohl(tvb, offset + 4) / 4294967296.0;
      proto_tree_add_text(tree, tvb, offset, 8,
                          "Timestamp: %04d-%02d-%02d %02d:%02d:%07.4f UTC",
                          stamp->tm_year + 1900, stamp->tm_mon + 1,
                          stamp->tm_mday, stamp->tm_hour, stamp->tm_min,
                          floatsec);
    } else {
      proto_tree_add_text(tree, tvb, offset, 8, "Timestamp not representable");
    }
    proto_tree_add_text(tree, tvb, offset + 8, 2, "Block Structure Desciptor: %u",
			tvb_get_ntohs(tvb, offset + 8));
    length = tvb_get_ntohs(tvb, offset + 10);
    proto_tree_add_text(tree, tvb, offset + 10, 2, "Authenticator length: %u",
			length);
    offset += 12;
    proto_tree_add_text(tree, tvb, offset, length, "Authentication block: %s",
			tvb_format_text(tvb, offset, length));
    offset += length;
    return offset;
}

/* SLPv2 version - Needs to be fixed to match RFC2608 sect 9.2*/
static int
dissect_authblk_v2(tvbuff_t *tvb, int offset, proto_tree *tree)
{
    guint16 length;
    
    proto_tree_add_item(tree, hf_srvloc_authblkv2_bsd, tvb, offset, 2, FALSE);
    proto_tree_add_item(tree, hf_srvloc_authblkv2_len, tvb, offset+2, 2, FALSE);
    proto_tree_add_item(tree, hf_srvloc_authblkv2_timestamp, tvb, offset+4, 4, FALSE);
    length = tvb_get_ntohs(tvb, offset + 8);
    proto_tree_add_uint(tree, hf_srvloc_authblkv2_slpspilen, tvb, offset + 8, 2, length);
    offset += 10;
    proto_tree_add_item(tree, hf_srvloc_authblkv2_slpspi, tvb, offset, length, TRUE);
    offset += length;
    /* add code in here to handle Structured Authentication Block */
    return offset;
}

static int
dissect_attrauthblk_v2(tvbuff_t *tvb, int offset, proto_tree *tree)
{
    tvb=tvb; tree=tree; /* silence gcc for now */
    /* add code in here to handle attribute authentication */
    return offset;
}

static void
add_v1_string(proto_tree *tree, int hf, tvbuff_t *tvb, int offset, int length,
    guint16 encoding)
{
        char *unicode_str;

        switch (encoding) {

        case CHARSET_ISO_10646_UCS_2:
                unicode_str = tvb_fake_unicode(tvb, offset, length/2, FALSE);
                proto_tree_add_string(tree, hf, tvb, offset, length,
                                    unicode_str);
                g_free(unicode_str);
                break;

        default:
                proto_tree_add_item(tree, hf, tvb, offset, length, TRUE);
                break;
        }
}

static int
dissect_url_entry_v1(tvbuff_t *tvb, int offset, proto_tree *tree,
                     guint16 encoding, guint16 flags)
{
    guint16	url_len;

    proto_tree_add_item(tree, hf_srvloc_url_lifetime, tvb, offset, 2,
			FALSE);
    offset += 2;
    url_len = tvb_get_ntohs(tvb, offset);
    proto_tree_add_uint(tree, hf_srvloc_url_urllen, tvb, offset, 2,
			url_len);
    offset += 2;
    add_v1_string(tree, hf_srvloc_url_url, tvb, offset, url_len, encoding);
    offset += url_len;
    if ( (flags & FLAG_U) == FLAG_U )
        offset = dissect_authblk(tvb, offset, tree);
    return offset;
}

static int
dissect_url_entry_v2(tvbuff_t *tvb, int offset, proto_tree *tree)
{
    guint8	reserved;
    guint16	url_len;
    guint8	num_auths;

    reserved = tvb_get_guint8(tvb, offset);
    proto_tree_add_uint(tree, hf_srvloc_url_reserved, tvb, offset, 1,
			reserved);
    offset += 1;
    proto_tree_add_item(tree, hf_srvloc_url_lifetime, tvb, offset, 2,
			FALSE);
    offset += 2;
    url_len = tvb_get_ntohs(tvb, offset);
    proto_tree_add_uint(tree, hf_srvloc_url_urllen, tvb, offset, 2,
			url_len);
    offset += 2;
    proto_tree_add_item(tree, hf_srvloc_url_url, tvb, offset, url_len, TRUE);
    offset += url_len;
    num_auths = tvb_get_guint8(tvb, offset);
    proto_tree_add_uint(tree, hf_srvloc_url_numauths, tvb, offset, 1,
			num_auths);
    offset += 1;
    while (num_auths > 0) {
	offset = dissect_authblk_v2(tvb, offset, tree);
	num_auths--;
    }
    return offset;
}

/* Packet dissection routine called by tcp & udp when port 427 detected */

static void
dissect_srvloc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
    int 	offset = 0;
    proto_item 	*ti, *tf;
    proto_tree 	*srvloc_tree, *srvloc_flags;
    guint8 	version;
    guint8 	function;
    guint16 	encoding;
    guint32 	length; /* three bytes needed for v2 */
    guint16 	flags; /* two byes needed for v2 */
    guint32 	count;
    guint32 	next_ext_off; /* three bytes, v2 only */
    guint16	lang_tag_len;
    nstime_t	ts;

    if (check_col(pinfo->cinfo, COL_PROTOCOL))
        col_set_str(pinfo->cinfo, COL_PROTOCOL, "SRVLOC");

    if (check_col(pinfo->cinfo, COL_INFO))
        col_clear(pinfo->cinfo, COL_INFO);

    version = tvb_get_guint8(tvb, offset);
    function = tvb_get_guint8(tvb, offset + 1);

    if (check_col(pinfo->cinfo, COL_INFO))
        col_add_str(pinfo->cinfo, COL_INFO,
            val_to_str(function, srvloc_functions, "Unknown Function (%u)"));

    if (tree) {
        ti = proto_tree_add_item(tree, proto_srvloc, tvb, offset, -1, FALSE);
        srvloc_tree = proto_item_add_subtree(ti, ett_srvloc);

        proto_tree_add_uint(srvloc_tree, hf_srvloc_version, tvb, offset, 1,
                            version);
        proto_tree_add_uint(srvloc_tree, hf_srvloc_function, tvb, offset + 1, 1,
                            function);
	if (version < 2) {
	    length = tvb_get_ntohs(tvb, offset + 2);
	    proto_tree_add_uint(srvloc_tree, hf_srvloc_pktlen, tvb, offset + 2, 2,
				length);
	    flags = tvb_get_guint8(tvb, offset + 4);
	    tf = proto_tree_add_uint(srvloc_tree, hf_srvloc_flags_v1, tvb, offset + 4, 1,
				     flags);
	    srvloc_flags = proto_item_add_subtree(tf, ett_srvloc_flags);
	    proto_tree_add_boolean(srvloc_flags, hf_srvloc_flags_v1_overflow,
				   tvb, offset+4, 1, flags);
	    proto_tree_add_boolean(srvloc_flags, hf_srvloc_flags_v1_monolingual,
				   tvb, offset+4, 1, flags);
	    proto_tree_add_boolean(srvloc_flags, hf_srvloc_flags_v1_url_auth,
				   tvb, offset+4, 1, flags);
	    proto_tree_add_boolean(srvloc_flags, hf_srvloc_flags_v1_attribute_auth,
				   tvb, offset+4, 1, flags);
	    proto_tree_add_boolean(srvloc_flags, hf_srvloc_flags_v1_fresh,
				   tvb, offset+4, 1, flags);
	    proto_tree_add_text(srvloc_tree, tvb, offset + 5, 1, "Dialect: %u",
				tvb_get_guint8(tvb, offset + 5));
	    proto_tree_add_text(srvloc_tree, tvb, offset + 6, 2, "Language: %s",
				tvb_format_text(tvb, offset + 6, 2));
	    encoding = tvb_get_ntohs(tvb, offset + 8);
	    proto_tree_add_text(srvloc_tree, tvb, offset + 8, 2, "Encoding: %u (%s)",
				encoding,
				val_to_str(encoding, charsets, "Unknown"));
	    proto_tree_add_text(srvloc_tree, tvb, offset + 10, 2, "Transaction ID: %u",
				tvb_get_ntohs(tvb, offset + 10));
	    offset += 12;

	    switch (function) {
            case SRVREQ:
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvreq_prlistlen, tvb, offset, 2, length);
                offset += 2;
                add_v1_string(srvloc_tree, hf_srvloc_srvreq_prlist, tvb, offset, length, encoding);
                offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvreq_predicatelen, tvb, offset, 2, length);
                offset += 2;
                add_v1_string(srvloc_tree, hf_srvloc_srvreq_predicate, tvb, offset, length, encoding);
                offset += length;
		break;
		
            case SRVRPLY:
                proto_tree_add_item(srvloc_tree, hf_srvloc_error, tvb, offset, 2, FALSE);
                offset += 2;
                count = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvrply_urlcount, tvb, offset, 2, count);
                offset += 2;
                while (count > 0) {
                    offset = dissect_url_entry_v1(tvb, offset, srvloc_tree,
                                                  encoding, flags);
                    count--;
                };
            break;

            case SRVREG:
                offset = dissect_url_entry_v1(tvb, offset, srvloc_tree, encoding,
                                           flags);
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvreg_attrlistlen, tvb, offset, 2, length);
                offset += 2;
                add_v1_string(srvloc_tree, hf_srvloc_srvreg_attrlist, tvb, offset, length, encoding);
                offset += length;
                if ( (flags & FLAG_A) == FLAG_A )
                    offset = dissect_authblk(tvb, offset, srvloc_tree);
            break;

            case SRVDEREG:
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(tree, hf_srvloc_url_urllen, tvb, offset, 2, length);
                offset += 2;
                add_v1_string(tree, hf_srvloc_url_url, tvb, offset, length, encoding);
                offset += length;
                if ( (flags & FLAG_U) == FLAG_U )
                    offset = dissect_authblk(tvb, offset, srvloc_tree);
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvdereg_taglistlen, tvb, offset, 2, length);
                offset += 2;
                add_v1_string(srvloc_tree, hf_srvloc_srvdereg_taglist, tvb, offset, length, encoding);
                offset += length;
                /*
                 * XXX - this was there before, but RFC 2165 doesn't speak
                 * of there being an attribute authentication block in
                 * a Service Deregister message.  Is that a post-RFC-2165
                 * addition?
                 */
                if ( (flags & FLAG_A) == FLAG_A )
                    offset = dissect_authblk(tvb, offset, srvloc_tree);
            break;

            case SRVACK:
                proto_tree_add_item(srvloc_tree, hf_srvloc_error, tvb, offset, 2, FALSE);
                offset += 2;
            break;

            case ATTRRQST:
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_attrreq_prlistlen, tvb, offset, 2, length);
                offset += 2;
                add_v1_string(srvloc_tree, hf_srvloc_attrreq_prlist, tvb, offset, length, encoding);
                offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_attrreq_urllen, tvb, offset, 2, length);
                offset += 2;
                add_v1_string(srvloc_tree, hf_srvloc_attrreq_url, tvb, offset, length, encoding);
                offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_attrreq_scopelistlen, tvb, offset, 2, length);
                offset += 2;
                add_v1_string(srvloc_tree, hf_srvloc_attrreq_scopelist, tvb, offset, length, encoding);
                offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_attrreq_attrlistlen, tvb, offset, 2, length);
                offset += 2;
                add_v1_string(srvloc_tree, hf_srvloc_attrreq_attrlist, tvb, offset, length, encoding);
                offset += length;
            break;

            case ATTRRPLY:
                proto_tree_add_item(srvloc_tree, hf_srvloc_error_v2, tvb, offset, 2, FALSE);
                offset += 2;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_attrrply_attrlistlen, tvb, offset, 2, length);
                offset += 2;
                add_v1_string(srvloc_tree, hf_srvloc_attrrply_attrlist, tvb, offset, length, encoding);
                offset += length;
                if ( (flags & FLAG_A) == FLAG_A )
                    offset = dissect_authblk(tvb, offset, srvloc_tree);
            break;

            case DAADVERT:
                proto_tree_add_item(srvloc_tree, hf_srvloc_error, tvb, offset, 2, FALSE);
                offset += 2;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_daadvert_urllen, tvb, offset, 2, length);
                offset += 2;
                add_v1_string(srvloc_tree, hf_srvloc_daadvert_url, tvb, offset, length, encoding);
                offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_daadvert_scopelistlen, tvb, offset, 2, length);
                offset += 2;
                add_v1_string(srvloc_tree, hf_srvloc_daadvert_scopelist, tvb, offset, length, encoding);
                offset += length;
            break;

            case SRVTYPERQST:
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvtypereq_prlistlen, tvb, offset, 2, length);
                offset += 2;
                add_v1_string(srvloc_tree, hf_srvloc_srvtypereq_prlist, tvb, offset, length, encoding);
                offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvtypereq_nameauthlistlen, tvb, offset, 2, length);
                offset += 2;
                add_v1_string(srvloc_tree, hf_srvloc_srvtypereq_nameauthlist, tvb, offset, length, encoding);
                offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvtypereq_scopelistlen, tvb, offset, 2, length);
                offset += 2;
                add_v1_string(srvloc_tree, hf_srvloc_srvtypereq_scopelist, tvb, offset, length, encoding);
                offset += length;
            break;

            case SRVTYPERPLY:
                proto_tree_add_item(srvloc_tree, hf_srvloc_error, tvb, offset, 2, FALSE);
                offset += 2;
                count = tvb_get_ntohs(tvb, offset);
                proto_tree_add_text(srvloc_tree, tvb, offset, 2, "Service Type Count: %u",
                                    count);
                offset += 2;
                while (count > 0) {
                    length = tvb_get_ntohs(tvb, offset);
                    proto_tree_add_uint(srvloc_tree, hf_srvloc_srvtyperply_srvtypelen, tvb, offset, 2, length);
                    offset += 2;
                    add_v1_string(srvloc_tree, hf_srvloc_srvtyperply_srvtype, tvb, offset, length, encoding);
                    offset += length;
                    count--;
                };
            break;

            default:
                proto_tree_add_text(srvloc_tree, tvb, offset, -1, "Unknown Function Type");
	    };
	}
	else { /* Version 2 */
	    length = tvb_get_ntoh24(tvb, offset + 2);
	    proto_tree_add_uint(srvloc_tree, hf_srvloc_pktlen, tvb, offset + 2, 3,
				length);
	    flags = tvb_get_ntohs(tvb, offset + 5);
	    tf = proto_tree_add_uint(srvloc_tree, hf_srvloc_flags_v2, tvb, offset + 5, 2,
				     flags);
	    srvloc_flags = proto_item_add_subtree(tf, ett_srvloc_flags);
	    proto_tree_add_boolean(srvloc_flags, hf_srvloc_flags_v2_overflow,
				   tvb, offset+5, 1, flags);
	    proto_tree_add_boolean(srvloc_flags, hf_srvloc_flags_v2_fresh,
				   tvb, offset+5, 1, flags);
	    proto_tree_add_boolean(srvloc_flags, hf_srvloc_flags_v2_reqmulti,
				   tvb, offset+5, 1, flags);

	    next_ext_off = tvb_get_ntoh24(tvb, offset + 7);
	    proto_tree_add_uint(srvloc_tree, hf_srvloc_nextextoff, tvb, offset + 7, 3,
				next_ext_off);
	    proto_tree_add_uint(srvloc_tree, hf_srvloc_xid, tvb, offset + 10, 2,
				tvb_get_ntohs(tvb, offset + 10));
	    lang_tag_len = tvb_get_ntohs(tvb, offset + 12);
	    proto_tree_add_uint(srvloc_tree, hf_srvloc_langtaglen, tvb, offset + 12, 2,	lang_tag_len);
	    proto_tree_add_item(srvloc_tree, hf_srvloc_langtag, tvb, offset + 14, lang_tag_len,	TRUE);
	    offset += 14+lang_tag_len;

	    switch (function) {
            case SRVREQ: /* RFC2608 8.1 */
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvreq_prlistlen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_srvreq_prlist, tvb, offset, length, TRUE);
                offset += length;
		length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvreq_srvtypelen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_srvreq_srvtypelist, tvb, offset, length, TRUE);
                offset += length;
		length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvreq_scopelistlen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_srvreq_scopelist, tvb, offset, length, TRUE);
		offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvreq_predicatelen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_srvreq_predicate, tvb, offset, length, TRUE);
		offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvreq_slpspilen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_srvreq_slpspi, tvb, offset, length, TRUE);
		offset += length;
		break;
		
            case SRVRPLY: /* RFC2608 8.2 */
                proto_tree_add_item(srvloc_tree, hf_srvloc_error_v2, tvb, offset, 2, FALSE);
                offset += 2;
                count = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvrply_urlcount, tvb, offset, 2, count);
                offset += 2;
                while (count > 0) {
		    offset = dissect_url_entry_v2(tvb, offset, srvloc_tree);
                    count--;
                };
            break;

            case SRVREG: /* RFC2608 8.3 */
		offset = dissect_url_entry_v2(tvb, offset, srvloc_tree);
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvreg_srvtypelen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_srvreg_srvtype, tvb, offset, length, TRUE);
                offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvreg_scopelistlen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_srvreg_scopelist, tvb, offset, length, TRUE);
                offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvreg_attrlistlen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_srvreg_attrlist, tvb, offset, length, TRUE);
                offset += length;
		count = tvb_get_guint8(tvb, offset);
		proto_tree_add_uint(srvloc_tree, hf_srvloc_srvreg_attrauthcount, tvb, offset, 1, count);
		offset += 1;
		while (count > 0) {
		    offset = dissect_attrauthblk_v2(tvb, offset, srvloc_tree);
		    count--;
		}
		break;

            case SRVDEREG: /* RFC2608 10.6 */
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvdereg_scopelistlen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_srvdereg_scopelist, tvb, offset, length, TRUE);
                offset += length;
		offset = dissect_url_entry_v2(tvb, offset, srvloc_tree);
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvdereg_taglistlen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_srvdereg_taglist, tvb, offset, length, TRUE);
                offset += length;
		break;
            
            case SRVACK: /* RFC2608 8.4 */
                proto_tree_add_item(srvloc_tree, hf_srvloc_error_v2, tvb, offset, 2, FALSE);
                offset += 2;
            break;

            case ATTRRQST: /* RFC2608 10.3*/
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_attrreq_prlistlen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_attrreq_prlist, tvb, offset, length, TRUE);
                offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_attrreq_urllen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_attrreq_url, tvb, offset, length, TRUE);
                offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_attrreq_scopelistlen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_attrreq_scopelist, tvb, offset, length, TRUE);
                offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_attrreq_taglistlen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_attrreq_taglist, tvb, offset, length, TRUE);
                offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_attrreq_slpspilen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_attrreq_slpspi, tvb, offset, length, TRUE);
                offset += length;
            break;

            case ATTRRPLY: /* RFC2608 10.4 */
                proto_tree_add_item(srvloc_tree, hf_srvloc_error_v2, tvb, offset, 2, FALSE);
                offset += 2;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_attrrply_attrlistlen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_attrrply_attrlist, tvb, offset, length, TRUE);
                offset += length;
		count = tvb_get_guint8(tvb, offset); 
		proto_tree_add_uint(srvloc_tree, hf_srvloc_attrrply_attrauthcount, tvb, offset, 1, count);
		offset += 1;
		while (count > 0) {
		    offset = dissect_attrauthblk_v2(tvb, offset, srvloc_tree);
		    count--;
		}
            break;
            
            case DAADVERT: /* RCC 2608 8.5 */
                proto_tree_add_item(srvloc_tree, hf_srvloc_error_v2, tvb, offset, 2, FALSE);
                offset += 2;
		ts.nsecs = 0;
		ts.secs = tvb_get_ntohl(tvb, offset);
		proto_tree_add_time(srvloc_tree, hf_srvloc_daadvert_timestamp, tvb, offset, 4,
				    &ts);
		offset += 4;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_daadvert_urllen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_daadvert_url, tvb, offset, length, TRUE);
                offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_daadvert_scopelistlen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_daadvert_scopelist, tvb, offset, length, TRUE);
                offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_daadvert_attrlistlen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_daadvert_attrlist, tvb, offset, length, TRUE);
                offset += length;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_daadvert_slpspilen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_daadvert_slpspi, tvb, offset, length, TRUE);
                offset += length;
		count = tvb_get_guint8(tvb, offset); 
		proto_tree_add_uint(srvloc_tree, hf_srvloc_daadvert_authcount, tvb, offset, 1, count);
		offset += 1;
		while (count > 0) {
		    offset = dissect_authblk_v2(tvb, offset, srvloc_tree);
		    count--;
		}
            break;

            case SRVTYPERQST: /* RFC2608 10.1 */
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvtypereq_prlistlen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_srvtypereq_prlist, tvb, offset, length, TRUE);
                offset += length;
                length = tvb_get_ntohs(tvb, offset);
		if (0xFFFF == length) {
		    proto_tree_add_uint(srvloc_tree, hf_srvloc_srvtypereq_nameauthlistlenall, tvb, offset, 2, length);
		    offset += 2;
		} else {
		    proto_tree_add_uint(srvloc_tree, hf_srvloc_srvtypereq_nameauthlistlen, tvb, offset, 2, length);
		    offset += 2;
		    proto_tree_add_item(srvloc_tree, hf_srvloc_srvtypereq_nameauthlist, tvb, offset, length, TRUE);
		    offset += length;
		}
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvtypereq_scopelistlen, tvb, offset, 2, length);
                offset += 2;
                proto_tree_add_item(srvloc_tree, hf_srvloc_srvtypereq_scopelist, tvb, offset, length, TRUE);
                offset += length;
            break;

	    case SRVTYPERPLY: /* rfc2608 10.2 */
                proto_tree_add_item(srvloc_tree, hf_srvloc_error_v2, tvb, offset, 2, FALSE);
                offset += 2;
                length = tvb_get_ntohs(tvb, offset);
                proto_tree_add_uint(srvloc_tree, hf_srvloc_srvtyperply_srvtypelistlen, tvb, offset, 2, length);
                offset += 2;
		proto_tree_add_item(srvloc_tree, hf_srvloc_srvtyperply_srvtypelist, tvb, offset, length, TRUE);
            break;

	    case SAADVERT: /* rfc2608 10.2 */
		length = tvb_get_ntohs(tvb, offset);
		proto_tree_add_uint(srvloc_tree, hf_srvloc_saadvert_urllen, tvb, offset, 2,
				    length);
		offset += 2;
		proto_tree_add_item(srvloc_tree, hf_srvloc_saadvert_url, tvb, offset, length, TRUE);
		offset += length;
		length = tvb_get_ntohs(tvb, offset);
		proto_tree_add_uint(srvloc_tree, hf_srvloc_saadvert_scopelistlen, tvb, offset, 2, length);
		offset += 2;
		proto_tree_add_item(srvloc_tree, hf_srvloc_saadvert_scopelist, tvb, offset, length, TRUE);
		offset += length;
		length = tvb_get_ntohs(tvb, offset);
		proto_tree_add_uint(srvloc_tree, hf_srvloc_saadvert_attrlistlen, tvb, offset, 2, length);
		offset += 2;
		proto_tree_add_item(srvloc_tree, hf_srvloc_saadvert_attrlist, tvb, offset, length, TRUE);
		offset += length;
		count = tvb_get_guint8(tvb, offset);
		proto_tree_add_uint(srvloc_tree, hf_srvloc_saadvert_authcount, tvb, offset, 1, length);
		offset += 1;
		while (count > 0) {
		    offset = dissect_authblk_v2(tvb, offset, srvloc_tree);
		    count--;
		}
		break;

            default:
                proto_tree_add_text(srvloc_tree, tvb, offset, -1, "Unknown Function Type");
	    };
	};
    }
}

static guint
get_srvloc_pdu_len(tvbuff_t *tvb, int offset)
{
    /*
     * Get the length of the SRVLOC packet.
     * It starts at offset+2, but it's 2 bytes in SLPv1 and 3 bytes
     * in SLPv2.
     */
    if (tvb_get_guint8(tvb, offset) == 2)
        return tvb_get_ntoh24(tvb, offset + 2);
    else
        return tvb_get_ntohs(tvb, offset + 2);
}

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

    if (check_col(pinfo->cinfo, COL_PROTOCOL))
        col_set_str(pinfo->cinfo, COL_PROTOCOL, "SRVLOC");

    if (check_col(pinfo->cinfo, COL_INFO))
        col_clear(pinfo->cinfo, COL_INFO);
	
    if (tree) {
        ti = proto_tree_add_item(tree, proto_srvloc, tvb, 0, -1, FALSE);
        srvloc_tree = proto_item_add_subtree(ti, ett_srvloc);
    }
    dissect_srvloc(tvb, pinfo, srvloc_tree);
}

static void
dissect_srvloc_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
    /*
     * XXX - in SLPv1, the fixed length need only be 4, as the length
     * is 2 bytes long; however, it must be 5 for SLPv2, as the length
     * is 3 bytes long, and there's probably no harm in asking for 5
     * bytes, as even SLPv1 packets start with a 12-byte header,
     * and if the packet has a length that's 4 or less, it's bogus,
     * and we can't handle a length < 4 anyway.
     */
    tcp_dissect_pdus(tvb, pinfo, tree, srvloc_desegment, 5, get_srvloc_pdu_len,
	dissect_srvloc_pdu);
}

/* Register protocol with Ethereal. */

void
proto_register_srvloc(void)
{
    static hf_register_info hf[] = {
	/* Helper functions for the Version 1 Header*/
        {&hf_srvloc_error,
            {"Error Code", "srvloc.err",
            FT_UINT16, BASE_DEC, VALS(srvloc_errs), 0x0,
            "", HFILL }
        },

	/* Helper function for the Version 2 Header */
        {&hf_srvloc_error_v2,
            {"Error Code", "srvloc.errv2",
            FT_UINT16, BASE_DEC, VALS(srvloc_errs_v2), 0x0,
            "", HFILL }
        },
        {&hf_srvloc_xid,
            {"XID", "srvloc.xid", 
            FT_UINT24, BASE_DEC, NULL, 0x0, 
            "Transaction ID", HFILL }
        },
        {&hf_srvloc_langtag,
            {"Lang Tag", "srvloc.langtag", 
            FT_STRING, BASE_NONE, NULL, 0x0, 
            "", HFILL }
        },
        {&hf_srvloc_langtaglen,
            {"Lang Tag Len", "srvloc.langtaglen", 
            FT_UINT16, BASE_DEC, NULL, 0x0, 
            "", HFILL }
        },
        {&hf_srvloc_nextextoff,
            {"Next Extension Offset", "srvloc.nextextoff", 
            FT_UINT24, BASE_DEC, NULL, 0x0, 
            "", HFILL }
        },

	/* Helper functions for URL and URL Entry parsing - both versions */
	{&hf_srvloc_url_reserved,
	 {"Reserved", "srvloc.url.reserved",
	  FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }
	},
	{&hf_srvloc_url_lifetime,
	 {"URL lifetime", "srvloc.url.lifetime",
	  FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }
	},
	{&hf_srvloc_url_urllen,
	 {"URL Length", "srvloc.url.urllen",
	  FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }
	},
	{&hf_srvloc_url_url,
	 {"URL", "srvloc.url.url",
	  FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }
	},
	{&hf_srvloc_url_numauths,
	 {"Num Auths", "srvloc.url.numauths",
	  FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }
	},

	/* Helper functions for the common header fields */
        {&hf_srvloc_function,
            {"Function", "srvloc.function",
            FT_UINT8, BASE_DEC, VALS(srvloc_functions), 0x0,
            "", HFILL }
        },

        {&hf_srvloc_pktlen,
            {"Packet Length", "srvloc.pktlen", 
            FT_UINT24, BASE_DEC, NULL, 0x0, 
            "", HFILL }
        },

        { &hf_srvloc_version,
            { "Version",           "srvloc.version",
            FT_UINT8, BASE_DEC, NULL, 0x0,
            "", HFILL }
        },

        {&hf_srvloc_flags_v1,
            {"Flags", "srvloc.flags_v1",
            FT_UINT8, BASE_HEX, NULL, 0x0,
            "", HFILL }
        },

	{ &hf_srvloc_flags_v1_overflow,
	  { "Overflow", "srvloc.flags_v1.overflow.", FT_BOOLEAN, 8,
	    TFS(&tfs_srvloc_flags_overflow), FLAG_O, "Can whole packet fit into a datagram?", HFILL }},

	{ &hf_srvloc_flags_v1_monolingual,
	  { "Monolingual", "srvloc.flags_v1.monolingual", FT_BOOLEAN, 8,
	    TFS(&tfs_srvloc_flags_v1_monolingual), FLAG_M, "Can whole packet fit into a datagram?", HFILL }},

	{ &hf_srvloc_flags_v1_url_auth,
	  { "URL Authentication", "srvloc.flags_v1.url_auth", FT_BOOLEAN, 8,
	    TFS(&tfs_srvloc_flags_v1_url_auth), FLAG_U, "Can whole packet fit into a datagram?", HFILL }},

	{ &hf_srvloc_flags_v1_attribute_auth,
	  { "Attribute Authentication", "srvloc.flags_v1.attribute_auth", FT_BOOLEAN, 8,
	    TFS(&tfs_srvloc_flags_v1_attribute_auth), FLAG_A, "Can whole packet fit into a datagram?", HFILL }},

	{ &hf_srvloc_flags_v1_fresh,
	  { "Fresh Registration", "srvloc.flags_v1.fresh", FT_BOOLEAN, 8,
	    TFS(&tfs_srvloc_flags_fresh), FLAG_F, "Is this a new registration?", HFILL }},

        {&hf_srvloc_flags_v2,
            {"Flags", "srvloc.flags_v2", 
            FT_UINT16, BASE_HEX, NULL, 0x0, 
             "", HFILL }
         },

	{ &hf_srvloc_flags_v2_overflow,
	  { "Overflow", "srvloc.flags_v2.overflow", FT_BOOLEAN, 16,
	    TFS(&tfs_srvloc_flags_overflow), FLAG_O_V2, "Can whole packet fit into a datagram?", HFILL }},

	{ &hf_srvloc_flags_v2_fresh,
	  { "Fresh Registration", "srvloc.flags_v2.fresh", FT_BOOLEAN, 16,
	    TFS(&tfs_srvloc_flags_fresh), FLAG_F_V2, "Is this a new registration?", HFILL }},

	{ &hf_srvloc_flags_v2_reqmulti,
	  { "Multicast requested", "srvloc.flags_v2.reqmulti", FT_BOOLEAN, 16,
	    TFS(&tfs_srvloc_flags_v2_reqmulti), FLAG_R_V2, "Do we want multicast?", HFILL }},

	/* collection of helper functions for dissect_authblk_v2 */
	{ &hf_srvloc_authblkv2_bsd,
	  { "BSD", "srvloc.authblkv2_bsd", FT_UINT16, BASE_HEX, NULL, 0x0,
	    "Block Structure Descriptor", HFILL}
	},
	{ &hf_srvloc_authblkv2_len,
	  { "Length", "srvloc.authblkv2_len", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of Authentication Block", HFILL}
	},
	{ &hf_srvloc_authblkv2_timestamp,
	  { "Timestamp", "srvloc.authblkv2.timestamp", FT_ABSOLUTE_TIME, BASE_NONE,
	    NULL, 0, "Timestamp on Authentication Block", HFILL }
	},
	{ &hf_srvloc_authblkv2_slpspilen,
	  { "SLP SPI Length", "srvloc.authblkv2.slpspilen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of the SLP SPI", HFILL}
	},
	{ &hf_srvloc_authblkv2_slpspi,
	  { "SLP SPI", "srvloc.authblkv2.slpspi", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},

	/* collection of helper functions for Service Request */
	{ &hf_srvloc_srvreq_prlistlen,
	  { "Previous Response List Length", "srvloc.srvreq.prlistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of Previous Response List", HFILL}
	},
	{ &hf_srvloc_srvreq_prlist,
	  { "Previous Response List", "srvloc.srvreq.prlist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "Previous Response List", HFILL}
	},
	{ &hf_srvloc_srvreq_srvtypelen,
	  { "Service Type Length", "srvloc.srvreq.srvtypelen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of Service Type List", HFILL}
	},
	{ &hf_srvloc_srvreq_srvtypelist,
	  { "Service Type List", "srvloc.srvreq.srvtypelist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_srvreq_scopelistlen,
	  { "Scope List Length", "srvloc.srvreq.scopelistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of the Scope List", HFILL}
	},
	{ &hf_srvloc_srvreq_scopelist,
	  { "Scope List", "srvloc.srvreq.scopelist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_srvreq_predicatelen,
	  { "Predicate Length", "srvloc.srvreq.predicatelen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of the Predicate", HFILL}
	},
	{ &hf_srvloc_srvreq_predicate,
	  { "Predicate", "srvloc.srvreq.predicate", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_srvreq_slpspilen,
	  { "SLP SPI Length", "srvloc.srvreq.slpspilen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of the SLP SPI", HFILL}
	},
	{ &hf_srvloc_srvreq_slpspi,
	  { "SLP SPI", "srvloc.srvreq.slpspi", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},

	/* Helper function for Service Request */
	{ &hf_srvloc_srvrply_urlcount,
	  { "Number of URLs", "srvloc.srvreq.urlcount", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "", HFILL}
	},

	/* Helper functions for Service Registration */
	{ &hf_srvloc_srvreg_srvtypelen,
	  { "Service Type Length", "srvloc.srvreq.srvtypelen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_srvreg_srvtype,
	  { "Service Type", "srvloc.srvreq.srvtype", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_srvreg_scopelistlen,
	  { "Scope List Length", "srvloc.srvreq.scopelistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_srvreg_scopelist,
	  { "Scope List", "srvloc.srvreq.scopelist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_srvreg_attrlistlen,
	  { "Attribute List Length", "srvloc.srvreq.attrlistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_srvreg_attrlist,
	  { "Attribute List", "srvloc.srvreq.attrlist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_srvreg_attrauthcount,
	  { "Attr Auths", "srvloc.srvreq.attrauthcount", FT_UINT8, BASE_DEC, NULL, 0x0,
	    "Number of Attribute Authentication Blocks", HFILL}
	},

	/* Helper functions for Service Deregistration */
	{ &hf_srvloc_srvdereg_scopelistlen,
	  { "Scope List Length", "srvloc.srvdereq.scopelistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_srvdereg_scopelist,
	  { "Scope List", "srvloc.srvdereq.scopelist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_srvdereg_taglistlen,
	  { "Tag List Length", "srvloc.srvdereq.taglistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_srvdereg_taglist,
	  { "Tag List", "srvloc.srvdereq.taglist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},


	/* collection of helper functions for Attribute Request */
	{ &hf_srvloc_attrreq_prlistlen,
	  { "Previous Response List Length", "srvloc.attrreq.prlistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of Previous Response List", HFILL}
	},
	{ &hf_srvloc_attrreq_prlist,
	  { "Previous Response List", "srvloc.attrreq.prlist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "Previous Response List", HFILL}
	},
	{ &hf_srvloc_attrreq_urllen,
	  { "URL Length", "srvloc.attrreq.urllen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_attrreq_url,
	  { "Service URL", "srvloc.attrreq.url", FT_STRING, BASE_NONE, NULL, 0x0,
	    "URL of service", HFILL}
	},
	{ &hf_srvloc_attrreq_scopelistlen,
	  { "Scope List Length", "srvloc.attrreq.scopelistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of the Scope List", HFILL}
	},
	{ &hf_srvloc_attrreq_scopelist,
	  { "Scope List", "srvloc.attrreq.scopelist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_attrreq_attrlistlen,
	  { "Attribute List Length", "srvloc.attrreq.attrlistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_attrreq_attrlist,
	  { "Attribute List", "srvloc.attrreq.attrlist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_attrreq_taglistlen,
	  { "Tag List Length", "srvloc.attrreq.taglistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_attrreq_taglist,
	  { "Tag List", "srvloc.attrreq.taglist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_attrreq_slpspilen,
	  { "SLP SPI Length", "srvloc.attrreq.slpspilen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of the SLP SPI", HFILL}
	},
	{ &hf_srvloc_attrreq_slpspi,
	  { "SLP SPI", "srvloc.attrreq.slpspi", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},

	/* collection of helper functions for Attribute Reply */
	{ &hf_srvloc_attrrply_attrlistlen,
	  { "Attribute List Length", "srvloc.attrrply.attrlistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of Attribute List", HFILL}
	},
	{ &hf_srvloc_attrrply_attrlist,
	  { "Attribute List", "srvloc.attrrply.attrlist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_attrrply_attrauthcount,
	  { "Attr Auths", "srvloc.srvreq.attrauthcount", FT_UINT8, BASE_DEC, NULL, 0x0,
	    "Number of Attribute Authentication Blocks", HFILL}
	},

	/* collection of helper functions for DA Advertisement */
	{ &hf_srvloc_daadvert_timestamp,
	  { "DAADVERT Timestamp", "srvloc.daadvert.timestamp", FT_ABSOLUTE_TIME, BASE_NONE,
	    NULL, 0, "Timestamp on DA Advert", HFILL }
	},
	{ &hf_srvloc_daadvert_urllen,
	  { "URL Length", "srvloc.daadvert.urllen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_daadvert_url,
	  { "URL", "srvloc.daadvert.url", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_daadvert_scopelistlen,
	  { "Scope List Length", "srvloc.daadvert.scopelistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of the Scope List", HFILL}
	},
	{ &hf_srvloc_daadvert_scopelist,
	  { "Scope List", "srvloc.daadvert.scopelist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_daadvert_attrlistlen,
	  { "Attribute List Length", "srvloc.daadvert.attrlistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_daadvert_attrlist,
	  { "Attribute List", "srvloc.daadvert.attrlist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_daadvert_slpspilen,
	  { "SLP SPI Length", "srvloc.daadvert.slpspilen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of the SLP SPI", HFILL}
	},
	{ &hf_srvloc_daadvert_slpspi,
	  { "SLP SPI", "srvloc.daadvert.slpspi", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_daadvert_authcount,
	  { "Auths", "srvloc.daadvert.authcount", FT_UINT8, BASE_DEC, NULL, 0x0,
	    "Number of Authentication Blocks", HFILL}
	},

	/* collection of helper functions for Service Type Request */
	{ &hf_srvloc_srvtypereq_prlistlen,
	  { "Previous Response List Length", "srvloc.srvtypereq.prlistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of Previous Response List", HFILL}
	},
	{ &hf_srvloc_srvtypereq_prlist,
	  { "Previous Response List", "srvloc.srvtypereq.prlist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "Previous Response List", HFILL}
	},
	{ &hf_srvloc_srvtypereq_nameauthlistlen,
	  { "Naming Authority List Length", "srvloc.srvtypereq.nameauthlistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of the Naming Authority List", HFILL}
	},
	{ &hf_srvloc_srvtypereq_nameauthlistlenall,
	  { "Naming Authority List Length (All Naming Authorities)", "srvloc.srvtypereq.nameauthlistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of the Naming Authority List", HFILL}
	},
	{ &hf_srvloc_srvtypereq_nameauthlist,
	  { "Naming Authority List", "srvloc.srvtypereq.nameauthlist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_srvtypereq_scopelistlen,
	  { "Scope List Length", "srvloc.srvtypereq.scopelistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of the Scope List", HFILL}
	},
	{ &hf_srvloc_srvtypereq_scopelist,
	  { "Scope List", "srvloc.srvtypereq.scopelist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},

	/* collection of helper functions for Service Type Replies */
	{ &hf_srvloc_srvtyperply_srvtypelen,
	  { "Service Type Length", "srvloc.srvtypereq.srvtypelen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of the Service Type", HFILL}
	},
	{ &hf_srvloc_srvtyperply_srvtype,
	  { "Service Type", "srvloc.srvtyperply.srvtype", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_srvtyperply_srvtypelistlen,
	  { "Service Type List Length", "srvloc.srvtypereq.srvtypelistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of the Service Type List", HFILL}
	},
	{ &hf_srvloc_srvtyperply_srvtypelist,
	  { "Service Type List", "srvloc.srvtyperply.srvtypelist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},

	/* collection of helper functions for SA Advertisement */
	{ &hf_srvloc_saadvert_urllen,
	  { "URL Length", "srvloc.saadvert.urllen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_saadvert_url,
	  { "URL", "srvloc.saadvert.url", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_saadvert_scopelistlen,
	  { "Scope List Length", "srvloc.saadvert.scopelistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "Length of the Scope List", HFILL}
	},
	{ &hf_srvloc_saadvert_scopelist,
	  { "Scope List", "srvloc.saadvert.scopelist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_saadvert_attrlistlen,
	  { "Attribute List Length", "srvloc.saadvert.attrlistlen", FT_UINT16, BASE_DEC, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_saadvert_attrlist,
	  { "Attribute List", "srvloc.saadvert.attrlist", FT_STRING, BASE_NONE, NULL, 0x0,
	    "", HFILL}
	},
	{ &hf_srvloc_saadvert_authcount,
	  { "Auths", "srvloc.saadvert.authcount", FT_UINT8, BASE_DEC, NULL, 0x0,
	    "Number of Authentication Blocks", HFILL}
	}

    };

    static gint *ett[] = {
	&ett_srvloc,
	&ett_srvloc_flags,
    };
	module_t *srvloc_module;

    proto_srvloc = proto_register_protocol("Service Location Protocol",
					   "SRVLOC", "srvloc");
    proto_register_field_array(proto_srvloc, hf, array_length(hf));
    proto_register_subtree_array(ett, array_length(ett));
	srvloc_module = prefs_register_protocol(proto_srvloc, NULL);
	prefs_register_bool_preference(srvloc_module, "desegment_tcp",
	    "Desegment all SRVLOC messages spanning multiple TCP segments",
	    "Whether the SRVLOC dissector should desegment all messages spanning multiple TCP segments",
	    &srvloc_desegment);
}

void
proto_reg_handoff_srvloc(void)
{
    dissector_handle_t srvloc_handle, srvloc_tcp_handle;

    srvloc_handle = create_dissector_handle(dissect_srvloc, proto_srvloc);
    dissector_add("udp.port", UDP_PORT_SRVLOC, srvloc_handle);
    srvloc_tcp_handle = create_dissector_handle(dissect_srvloc_tcp,
						proto_srvloc);
    dissector_add("tcp.port", TCP_PORT_SRVLOC, srvloc_tcp_handle);
}