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
|
/* packet-usb-com.c
* Routines for USB Communications and CDC Control dissection
* Copyright 2013, Pascal Quantin <pascal.quantin@gmail.com>
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <epan/packet.h>
#include "packet-usb.h"
/* protocols and header fields */
static int proto_usb_com = -1;
static int hf_usb_com_descriptor_subtype = -1;
static int hf_usb_com_descriptor_cdc = -1;
static int hf_usb_com_descriptor_payload = -1;
static int hf_usb_com_control_subclass = -1;
static int hf_usb_com_capabilities = -1;
static int hf_usb_com_descriptor_acm_capabilities_reserved = -1;
static int hf_usb_com_descriptor_acm_capabilities_network_connection = -1;
static int hf_usb_com_descriptor_acm_capabilities_send_break = -1;
static int hf_usb_com_descriptor_acm_capabilities_line_and_state = -1;
static int hf_usb_com_descriptor_acm_capabilities_comm_features = -1;
static int hf_usb_com_control_interface = -1;
static int hf_usb_com_subordinate_interface = -1;
static int hf_usb_com_descriptor_cm_capabilities_reserved = -1;
static int hf_usb_com_descriptor_cm_capabilities_call_managment_over_data_class_interface = -1;
static int hf_usb_com_descriptor_cm_capabilities_call_managment = -1;
static int hf_usb_com_descriptor_cm_data_interface = -1;
static int hf_usb_com_control_payload = -1;
static gint ett_usb_com = -1;
static gint ett_usb_com_capabilities = -1;
static dissector_handle_t mbim_control_handle;
static dissector_handle_t mbim_descriptor_handle;
static dissector_handle_t mbim_bulk_handle;
static dissector_handle_t eth_withoutfcs_handle;
#define CS_INTERFACE 0x24
#define CS_ENDPOINT 0x25
static const value_string usb_com_descriptor_type_vals[] = {
{ CS_INTERFACE, "CS_INTERFACE"},
{ CS_ENDPOINT, "CS_ENDPOINT"},
{ 0, NULL}
};
static value_string_ext usb_com_descriptor_type_vals_ext = VALUE_STRING_EXT_INIT(usb_com_descriptor_type_vals);
static const value_string usb_com_descriptor_subtype_vals[] = {
{ 0x00, "Header Functional Descriptor"},
{ 0x01, "Call Management Functional Descriptor"},
{ 0x02, "Abstract Control Management Functional Descriptor"},
{ 0x03, "Direct Line Management Functional Descriptor"},
{ 0x04, "Telephone Ringer Functional Descriptor"},
{ 0x05, "Telephone Call and Line State Reporting Capabilities Functional Descriptor"},
{ 0x06, "Union Functional Descriptor"},
{ 0x07, "Country Selection Functional Descriptor"},
{ 0x08, "Telephone Operational Modes Functional Descriptor"},
{ 0x09, "USB Terminal Functional Descriptor"},
{ 0x0A, "Network Channel Terminal Descriptor"},
{ 0x0B, "Protocol Unit Functional Descriptor"},
{ 0x0C, "Extension Unit Functional Descriptor"},
{ 0x0D, "Multi-Channel Management Functional Descriptor"},
{ 0x0E, "CAPI Control Management Functional Descriptor"},
{ 0x0F, "Ethernet Networking Functional Descriptor"},
{ 0x10, "ATM Networking Functional Descriptor"},
{ 0x11, "Wireless Handset Control Model Functional Descriptor"},
{ 0x12, "Mobile Direct Line Model Functional Descriptor"},
{ 0x13, "MDLM Detail Functional Descriptor"},
{ 0x14, "Device Management Model Functional Descriptor"},
{ 0x15, "OBEX Functional Descriptor"},
{ 0x16, "Command Set Functional Descriptor"},
{ 0x17, "Command Set Detail Functional Descriptor"},
{ 0x18, "Telephone Control Model Functional Descriptor"},
{ 0x19, "OBEX Service Identifier Functional Descriptor"},
{ 0x1A, "NCM Functional Descriptor"},
{ 0x1B, "MBIM Functional Descriptor"},
{ 0x1C, "MBIM Extended Functional Descriptor"},
{ 0, NULL}
};
static value_string_ext usb_com_descriptor_subtype_vals_ext = VALUE_STRING_EXT_INIT(usb_com_descriptor_subtype_vals);
#define COM_SUBCLASS_RESERVED 0x00
#define COM_SUBCLASS_DLCM 0x01
#define COM_SUBCLASS_ACM 0x02
#define COM_SUBCLASS_TCM 0x03
#define COM_SUBCLASS_MCCM 0x04
#define COM_SUBCLASS_CCM 0x05
#define COM_SUBCLASS_ENCM 0x06
#define COM_SUBCLASS_ANCM 0x07
#define COM_SUBCLASS_WHCM 0x08
#define COM_SUBCLASS_DM 0x09
#define COM_SUBCLASS_MDLM 0x0a
#define COM_SUBCLASS_OBEX 0x0b
#define COM_SUBCLASS_EEM 0x0c
#define COM_SUBCLASS_NCM 0x0d
#define COM_SUBCLASS_MBIM 0x0e
static const value_string usb_com_subclass_vals[] = {
{COM_SUBCLASS_RESERVED, "RESERVED"},
{COM_SUBCLASS_DLCM, "Direct Line Control Model"},
{COM_SUBCLASS_ACM, "Abstract Control Model"},
{COM_SUBCLASS_TCM, "Telephone Control Model"},
{COM_SUBCLASS_MCCM, "Multi-Channel Control Model"},
{COM_SUBCLASS_CCM, "CAPI Control Model"},
{COM_SUBCLASS_ENCM, "Ethernet Networking Control Model"},
{COM_SUBCLASS_ANCM, "ATM Networking Control Model"},
{COM_SUBCLASS_WHCM, "Wireless Handset Control Model"},
{COM_SUBCLASS_DM, "Device Management"},
{COM_SUBCLASS_MDLM, "Mobile Direct Line Model"},
{COM_SUBCLASS_OBEX, "OBEX"},
{COM_SUBCLASS_EEM, "Ethernet Emulation Model"},
{COM_SUBCLASS_NCM, "Network Control Model"},
{COM_SUBCLASS_MBIM, "Mobile Broadband Interface Model"},
{0, NULL}
};
value_string_ext ext_usb_com_subclass_vals = VALUE_STRING_EXT_INIT(usb_com_subclass_vals);
void proto_register_usb_com(void);
void proto_reg_handoff_usb_com(void);
static int
dissect_usb_com_descriptor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
guint8 offset = 0, type, subtype;
proto_tree *subtree;
proto_tree *subtree_capabilities;
proto_item *subitem_capabilities;
proto_item *ti;
ti = proto_tree_add_text(tree, tvb, offset, -1, "COMMUNICATIONS DESCRIPTOR");
subtree = proto_item_add_subtree(ti, ett_usb_com);
dissect_usb_descriptor_header(subtree, tvb, offset, &usb_com_descriptor_type_vals_ext);
offset += 2;
type = tvb_get_guint8(tvb, 1);
switch (type) {
case CS_INTERFACE:
subtype = tvb_get_guint8(tvb, offset);
proto_tree_add_uint(subtree, hf_usb_com_descriptor_subtype, tvb, offset, 1, subtype);
offset++;
switch (subtype) {
case 0x00:
proto_tree_add_item(subtree, hf_usb_com_descriptor_cdc, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
break;
case 0x01:
subitem_capabilities = proto_tree_add_item(subtree, hf_usb_com_capabilities, tvb, 3, 1, ENC_LITTLE_ENDIAN);
subtree_capabilities = proto_item_add_subtree(subitem_capabilities, ett_usb_com_capabilities);
proto_tree_add_item(subtree_capabilities, hf_usb_com_descriptor_cm_capabilities_reserved, tvb, 3, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(subtree_capabilities, hf_usb_com_descriptor_cm_capabilities_call_managment_over_data_class_interface, tvb, 3, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(subtree_capabilities, hf_usb_com_descriptor_cm_capabilities_call_managment, tvb, 3, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(subtree, hf_usb_com_descriptor_cm_data_interface, tvb, 4, 1, ENC_LITTLE_ENDIAN);
offset = 5;
break;
case 0x02:
subitem_capabilities = proto_tree_add_item(subtree, hf_usb_com_capabilities, tvb, 3, 1, ENC_LITTLE_ENDIAN);
subtree_capabilities = proto_item_add_subtree(subitem_capabilities, ett_usb_com_capabilities);
proto_tree_add_item(subtree_capabilities, hf_usb_com_descriptor_acm_capabilities_reserved, tvb, 3, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(subtree_capabilities, hf_usb_com_descriptor_acm_capabilities_network_connection, tvb, 3, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(subtree_capabilities, hf_usb_com_descriptor_acm_capabilities_send_break, tvb, 3, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(subtree_capabilities, hf_usb_com_descriptor_acm_capabilities_line_and_state, tvb, 3, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(subtree_capabilities, hf_usb_com_descriptor_acm_capabilities_comm_features, tvb, 3, 1, ENC_LITTLE_ENDIAN);
offset = 4;
break;
case 0x06:
offset = 3;
proto_tree_add_item(subtree, hf_usb_com_control_interface, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
while (tvb_length_remaining(tvb,offset) > 0) {
proto_tree_add_item(subtree, hf_usb_com_subordinate_interface, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
}
break;
case 0x1b:
case 0x1c:
offset = call_dissector_only(mbim_descriptor_handle, tvb, pinfo, subtree, NULL);
break;
default:
break;
}
break;
case CS_ENDPOINT:
default:
break;
}
if (tvb_reported_length_remaining(tvb, offset) != 0) {
proto_tree_add_item(subtree, hf_usb_com_descriptor_payload, tvb, offset, -1, ENC_NA);
}
return tvb_length(tvb);
}
static int
dissect_usb_com_control(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
usb_conv_info_t *usb_conv_info;
proto_tree *subtree;
proto_item *ti;
gint offset = 0;
usb_conv_info = (usb_conv_info_t *)pinfo->usb_conv_info;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "USBCOM");
ti = proto_tree_add_item(tree, proto_usb_com, tvb, 0, -1, ENC_NA);
subtree = proto_item_add_subtree(ti, ett_usb_com);
if (usb_conv_info) {
ti = proto_tree_add_uint(subtree, hf_usb_com_control_subclass, tvb, 0, 0,
usb_conv_info->interfaceSubclass);
PROTO_ITEM_SET_GENERATED(ti);
switch (usb_conv_info->interfaceSubclass)
{
case COM_SUBCLASS_MBIM:
offset = call_dissector_only(mbim_control_handle, tvb, pinfo, tree, NULL);
break;
default:
break;
}
}
if (tvb_reported_length_remaining(tvb, offset) != 0) {
proto_tree_add_item(subtree, hf_usb_com_control_payload, tvb, offset, -1, ENC_NA);
}
return tvb_length(tvb);
}
static int
dissect_usb_com_bulk(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
usb_conv_info_t *usb_conv_info;
usb_conv_info = (usb_conv_info_t *)pinfo->usb_conv_info;
if (usb_conv_info) {
switch (usb_conv_info->interfaceProtocol)
{
case 0x01: /* Network Transfer Block */
case 0x02: /* Network Transfer Block (IP + DSS) */
return call_dissector_only(mbim_bulk_handle, tvb, pinfo, tree, NULL);
break;
default:
break;
}
}
/* By default, assume it is ethernet without FCS */
return call_dissector_only(eth_withoutfcs_handle, tvb, pinfo, tree, NULL);
}
void
proto_register_usb_com(void)
{
static hf_register_info hf[] = {
{ &hf_usb_com_descriptor_subtype,
{ "bDescriptorSubtype", "usbcom.descriptor.subtype", FT_UINT8, BASE_HEX|BASE_EXT_STRING,
&usb_com_descriptor_subtype_vals_ext, 0, NULL, HFILL }},
{ &hf_usb_com_descriptor_cdc,
{ "bcdCDC", "usbcom.descriptor.cdc", FT_UINT16, BASE_HEX,
NULL, 0, NULL, HFILL }},
{ &hf_usb_com_descriptor_payload,
{ "Payload", "usbcom.descriptor.payload", FT_BYTES, BASE_NONE,
NULL, 0, NULL, HFILL }},
{ &hf_usb_com_control_subclass,
{ "Subclass", "usbcom.control.subclass", FT_UINT8, BASE_HEX|BASE_EXT_STRING,
&ext_usb_com_subclass_vals, 0, NULL, HFILL }},
{ &hf_usb_com_capabilities,
{ "bmCapabilities", "usbcom.descriptor.capabilities", FT_UINT8, BASE_HEX,
NULL, 0, NULL, HFILL }},
{ &hf_usb_com_descriptor_acm_capabilities_reserved,
{ "Reserved", "usbcom.descriptor.acm.capabilities.reserved", FT_UINT8, BASE_HEX,
NULL, 0xF0, NULL, HFILL }},
{ &hf_usb_com_descriptor_acm_capabilities_network_connection,
{ "Network_Connection", "usbcom.descriptor.acm.capabilities.network_connection", FT_BOOLEAN, 8,
&tfs_supported_not_supported, 0x08, NULL, HFILL }},
{ &hf_usb_com_descriptor_acm_capabilities_send_break,
{ "Send_Break", "usbcom.descriptor.acm.capabilities.network_connection", FT_BOOLEAN, 8,
&tfs_supported_not_supported, 0x04, NULL, HFILL }},
{ &hf_usb_com_descriptor_acm_capabilities_line_and_state,
{ "Line Requests and State Notification", "usbcom.descriptor.acm.capabilities.line_and_state", FT_BOOLEAN, 8,
&tfs_supported_not_supported, 0x02, NULL, HFILL }},
{ &hf_usb_com_descriptor_acm_capabilities_comm_features,
{ "Comm Features Combinations", "usbcom.descriptor.acm.capabilities.comm_features", FT_BOOLEAN, 8,
&tfs_supported_not_supported, 0x01, NULL, HFILL }},
{ &hf_usb_com_control_interface,
{ "bControlInterface", "usbcom.descriptor.control_interface", FT_UINT8, BASE_HEX,
NULL, 0, NULL, HFILL }},
{ &hf_usb_com_subordinate_interface,
{ "bSubordinateInterface", "usbcom.descriptor.subordinate_interface", FT_UINT8, BASE_HEX,
NULL, 0, NULL, HFILL }},
{ &hf_usb_com_descriptor_cm_capabilities_reserved,
{ "Reserved", "usbcom.descriptor.cm.capabilities.reserved", FT_UINT8, BASE_HEX,
NULL, 0xFC, NULL, HFILL }},
{ &hf_usb_com_descriptor_cm_capabilities_call_managment_over_data_class_interface,
{ "Call Managment over Data Class Interface", "usbcom.descriptor.cm.capabilities.call_managment_over_data_class_interface", FT_BOOLEAN, 8,
&tfs_supported_not_supported, 0x02, NULL, HFILL }},
{ &hf_usb_com_descriptor_cm_capabilities_call_managment,
{ "Call Managment", "usbcom.descriptor.cm.capabilities.call_managment", FT_BOOLEAN, 8,
&tfs_supported_not_supported, 0x01, NULL, HFILL }},
{ &hf_usb_com_descriptor_cm_data_interface,
{ "bDataInterface", "usbcom.descriptor.cm.data_interface", FT_UINT8, BASE_HEX,
NULL, 0, NULL, HFILL }},
{ &hf_usb_com_control_payload,
{ "Payload", "usbcom.control.payload", FT_BYTES, BASE_NONE,
NULL, 0, NULL, HFILL }}
};
static gint *usb_com_subtrees[] = {
&ett_usb_com,
&ett_usb_com_capabilities
};
proto_usb_com = proto_register_protocol("USB Communications and CDC Control", "USBCOM", "usbcom");
proto_register_field_array(proto_usb_com, hf, array_length(hf));
proto_register_subtree_array(usb_com_subtrees, array_length(usb_com_subtrees));
}
void
proto_reg_handoff_usb_com(void)
{
dissector_handle_t usb_com_descriptor_handle, usb_com_control_handle, usb_com_bulk_handle;
usb_com_descriptor_handle = new_create_dissector_handle(dissect_usb_com_descriptor, proto_usb_com);
dissector_add_uint("usb.descriptor", IF_CLASS_COMMUNICATIONS, usb_com_descriptor_handle);
usb_com_control_handle = new_create_dissector_handle(dissect_usb_com_control, proto_usb_com);
dissector_add_uint("usb.control", IF_CLASS_COMMUNICATIONS, usb_com_control_handle);
usb_com_bulk_handle = new_create_dissector_handle(dissect_usb_com_bulk, proto_usb_com);
dissector_add_uint("usb.bulk", IF_CLASS_CDC_DATA, usb_com_bulk_handle);
mbim_control_handle = find_dissector("mbim.control");
mbim_descriptor_handle = find_dissector("mbim.descriptor");
mbim_bulk_handle = find_dissector("mbim.bulk");
eth_withoutfcs_handle = find_dissector("eth_withoutfcs");
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
|
