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
|
/* packet-dsp.c
* Routines for X.518 (X.500 Distributed Operations) packet dissection
* Graeme Lunt 2005
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/expert.h>
#include <epan/prefs.h>
#include <epan/oids.h>
#include <epan/asn1.h>
#include "packet-ber.h"
#include "packet-acse.h"
#include "packet-ros.h"
#include "packet-x509if.h"
#include "packet-x509af.h"
#include "packet-x509sat.h"
#include "packet-dap.h"
#include "packet-dsp.h"
#define PNAME "X.519 Directory System Protocol"
#define PSNAME "DSP"
#define PFNAME "dsp"
void proto_register_dsp(void);
void proto_reg_handoff_dsp(void);
/* Initialize the protocol and registered fields */
static int proto_dsp = -1;
#include "packet-dsp-hf.c"
/* Initialize the subtree pointers */
static gint ett_dsp = -1;
#include "packet-dsp-ett.c"
static expert_field ei_dsp_unsupported_opcode = EI_INIT;
static expert_field ei_dsp_unsupported_errcode = EI_INIT;
static expert_field ei_dsp_unsupported_pdu = EI_INIT;
static expert_field ei_dsp_zero_pdu = EI_INIT;
#include "packet-dsp-fn.c"
static dissector_handle_t dsp_handle;
/*
* Dissect X518 PDUs inside a ROS PDUs
*/
static int
dissect_dsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, void* data)
{
int offset = 0;
int old_offset;
proto_item *item;
proto_tree *tree;
struct SESSION_DATA_STRUCTURE* session;
int (*dsp_dissector)(gboolean implicit_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, proto_tree *tree, int hf_index _U_) = NULL;
const char *dsp_op_name;
asn1_ctx_t asn1_ctx;
/* do we have operation information from the ROS dissector? */
if (data == NULL)
return 0;
session = (struct SESSION_DATA_STRUCTURE*)data;
asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
item = proto_tree_add_item(parent_tree, proto_dsp, tvb, 0, -1, ENC_NA);
tree = proto_item_add_subtree(item, ett_dsp);
col_set_str(pinfo->cinfo, COL_PROTOCOL, "DAP");
col_clear(pinfo->cinfo, COL_INFO);
asn1_ctx.private_data = session;
switch(session->ros_op & ROS_OP_MASK) {
case (ROS_OP_BIND | ROS_OP_ARGUMENT): /* BindInvoke */
dsp_dissector = dissect_dsp_DSASystemBindArgument;
dsp_op_name = "System-Bind-Argument";
break;
case (ROS_OP_BIND | ROS_OP_RESULT): /* BindResult */
dsp_dissector = dissect_dsp_DSASystemBindResult;
dsp_op_name = "System-Bind-Result";
break;
case (ROS_OP_BIND | ROS_OP_ERROR): /* BindError */
dsp_dissector = dissect_dsp_DSASystemBindError;
dsp_op_name = "System-Bind-Error";
break;
case (ROS_OP_INVOKE | ROS_OP_ARGUMENT): /* Invoke Argument */
switch(session->ros_op & ROS_OP_OPCODE_MASK) {
case 1: /* read */
dsp_dissector = dissect_dsp_ChainedReadArgument;
dsp_op_name = "Chained-Read-Argument";
break;
case 2: /* compare */
dsp_dissector = dissect_dsp_ChainedCompareArgument;
dsp_op_name = "Chained-Compare-Argument";
break;
case 3: /* abandon */
dsp_dissector = dissect_dsp_ChainedAbandonArgument;
dsp_op_name = "Chained-Abandon-Argument";
break;
case 4: /* list */
dsp_dissector = dissect_dsp_ChainedListArgument;
dsp_op_name = "Chained-List-Argument";
break;
case 5: /* search */
dsp_dissector = dissect_dsp_ChainedSearchArgument;
dsp_op_name = "Chained-Search-Argument";
break;
case 6: /* addEntry */
dsp_dissector = dissect_dsp_ChainedAddEntryArgument;
dsp_op_name = "Chained-Add-Entry-Argument";
break;
case 7: /* removeEntry */
dsp_dissector = dissect_dsp_ChainedRemoveEntryArgument;
dsp_op_name = "Chained-Remove-Entry-Argument";
break;
case 8: /* modifyEntry */
dsp_dissector = dissect_dsp_ChainedModifyEntryArgument;
dsp_op_name = "ChainedModify-Entry-Argument";
break;
case 9: /* modifyDN */
dsp_dissector = dissect_dsp_ChainedModifyDNArgument;
dsp_op_name = "ChainedModify-DN-Argument";
break;
default:
proto_tree_add_expert_format(tree, pinfo, &ei_dsp_unsupported_opcode, tvb, offset, -1,
"Unsupported DSP opcode (%d)", session->ros_op & ROS_OP_OPCODE_MASK);
break;
}
break;
case (ROS_OP_INVOKE | ROS_OP_RESULT): /* Return Result */
switch(session->ros_op & ROS_OP_OPCODE_MASK) {
case 1: /* read */
dsp_dissector = dissect_dsp_ChainedReadResult;
dsp_op_name = "Chained-Read-Result";
break;
case 2: /* compare */
dsp_dissector = dissect_dsp_ChainedCompareResult;
dsp_op_name = "Chained-Compare-Result";
break;
case 3: /* abandon */
dsp_dissector = dissect_dsp_ChainedAbandonResult;
dsp_op_name = "Chained-Abandon-Result";
break;
case 4: /* list */
dsp_dissector = dissect_dsp_ChainedListResult;
dsp_op_name = "Chained-List-Result";
break;
case 5: /* search */
dsp_dissector = dissect_dsp_ChainedSearchResult;
dsp_op_name = "Chained-Search-Result";
break;
case 6: /* addEntry */
dsp_dissector = dissect_dsp_ChainedAddEntryResult;
dsp_op_name = "Chained-Add-Entry-Result";
break;
case 7: /* removeEntry */
dsp_dissector = dissect_dsp_ChainedRemoveEntryResult;
dsp_op_name = "Chained-Remove-Entry-Result";
break;
case 8: /* modifyEntry */
dsp_dissector = dissect_dsp_ChainedModifyEntryResult;
dsp_op_name = "Chained-Modify-Entry-Result";
break;
case 9: /* modifyDN */
dsp_dissector = dissect_dsp_ChainedModifyDNResult;
dsp_op_name = "ChainedModify-DN-Result";
break;
default:
proto_tree_add_expert(tree, pinfo, &ei_dsp_unsupported_opcode, tvb, offset, -1);
break;
}
break;
case (ROS_OP_INVOKE | ROS_OP_ERROR): /* Return Error */
switch(session->ros_op & ROS_OP_OPCODE_MASK) {
case 1: /* attributeError */
dsp_dissector = dissect_dap_AttributeError;
dsp_op_name = "Attribute-Error";
break;
case 2: /* nameError */
dsp_dissector = dissect_dap_NameError;
dsp_op_name = "Name-Error";
break;
case 3: /* serviceError */
dsp_dissector = dissect_dap_ServiceError;
dsp_op_name = "Service-Error";
break;
case 4: /* referral */
dsp_dissector = dissect_dap_Referral;
dsp_op_name = "Referral";
break;
case 5: /* abandoned */
dsp_dissector = dissect_dap_Abandoned;
dsp_op_name = "Abandoned";
break;
case 6: /* securityError */
dsp_dissector = dissect_dap_SecurityError;
dsp_op_name = "Security-Error";
break;
case 7: /* abandonFailed */
dsp_dissector = dissect_dap_AbandonFailedError;
dsp_op_name = "Abandon-Failed-Error";
break;
case 8: /* updateError */
dsp_dissector = dissect_dap_UpdateError;
dsp_op_name = "Update-Error";
break;
case 9: /* DSAReferral */
dsp_dissector = dissect_dsp_DSAReferral;
dsp_op_name = "DSA-Referral";
break;
default:
proto_tree_add_expert(tree, pinfo, &ei_dsp_unsupported_errcode, tvb, offset, -1);
break;
}
break;
default:
proto_tree_add_expert(tree, pinfo, &ei_dsp_unsupported_pdu, tvb, offset, -1);
return tvb_captured_length(tvb);
}
if(dsp_dissector) {
col_set_str(pinfo->cinfo, COL_INFO, dsp_op_name);
while (tvb_reported_length_remaining(tvb, offset) > 0){
old_offset=offset;
offset=(*dsp_dissector)(FALSE, tvb, offset, &asn1_ctx, tree, -1);
if(offset == old_offset){
proto_tree_add_expert(tree, pinfo, &ei_dsp_zero_pdu, tvb, offset, -1);
break;
}
}
}
return tvb_captured_length(tvb);
}
/*--- proto_register_dsp -------------------------------------------*/
void proto_register_dsp(void) {
/* List of fields */
static hf_register_info hf[] =
{
#include "packet-dsp-hfarr.c"
};
/* List of subtrees */
static gint *ett[] = {
&ett_dsp,
#include "packet-dsp-ettarr.c"
};
static ei_register_info ei[] = {
{ &ei_dsp_unsupported_opcode, { "dsp.unsupported_opcode", PI_UNDECODED, PI_WARN, "Unsupported DSP opcode", EXPFILL }},
{ &ei_dsp_unsupported_errcode, { "dsp.unsupported_errcode", PI_UNDECODED, PI_WARN, "Unsupported DSP errcode", EXPFILL }},
{ &ei_dsp_unsupported_pdu, { "dsp.unsupported_pdu", PI_UNDECODED, PI_WARN, "Unsupported DSP PDU", EXPFILL }},
{ &ei_dsp_zero_pdu, { "dsp.zero_pdu", PI_PROTOCOL, PI_ERROR, "Internal error, zero-byte DSP PDU", EXPFILL }},
};
module_t *dsp_module;
expert_module_t* expert_dsp;
/* Register protocol */
proto_dsp = proto_register_protocol(PNAME, PSNAME, PFNAME);
dsp_handle = register_dissector("dsp", dissect_dsp, proto_dsp);
/* Register fields and subtrees */
proto_register_field_array(proto_dsp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_dsp = expert_register_protocol(proto_dsp);
expert_register_field_array(expert_dsp, ei, array_length(ei));
/* Register our configuration options for DSP, particularly our port */
dsp_module = prefs_register_protocol_subtree("OSI/X.500", proto_dsp, NULL);
prefs_register_obsolete_preference(dsp_module, "tcp.port");
prefs_register_static_text_preference(dsp_module, "tcp_port_info",
"The TCP ports used by the DSP protocol should be added to the TPKT preference \"TPKT TCP ports\", or by selecting \"TPKT\" as the \"Transport\" protocol in the \"Decode As\" dialog.",
"DSP TCP Port preference moved information");
}
/*--- proto_reg_handoff_dsp --- */
void proto_reg_handoff_dsp(void) {
#include "packet-dsp-dis-tab.c"
/* APPLICATION CONTEXT */
oid_add_from_string("id-ac-directory-system","2.5.3.2");
/* ABSTRACT SYNTAXES */
/* Register DSP with ROS (with no use of RTSE) */
register_ros_oid_dissector_handle("2.5.9.2", dsp_handle, 0, "id-as-directory-system", FALSE);
}
|
