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
|
/* packet-etw.c
* Routines for ETW Dissection
*
* Copyright 2020, Odysseus Yang
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/* Dissector based on ETW Trace
* https://docs.microsoft.com/en-us/windows/win32/etw/event-tracing-portal
*/
#include "config.h"
#include <epan/packet.h>
#include <wiretap/wtap.h>
void proto_register_etw(void);
void proto_reg_handoff_etw(void);
static dissector_handle_t etw_handle;
static int proto_etw;
static int hf_etw_size;
static int hf_etw_header_type;
static int hf_etw_header_flag_extended_info;
static int hf_etw_header_flag_private_session;
static int hf_etw_header_flag_string_only;
static int hf_etw_header_flag_trace_message;
static int hf_etw_header_flag_no_cputime;
static int hf_etw_header_flag_32_bit_header;
static int hf_etw_header_flag_64_bit_header;
static int hf_etw_header_flag_decode_guid;
static int hf_etw_header_flag_classic_header;
static int hf_etw_header_flag_processor_index;
static int hf_etw_flags;
static int hf_etw_event_property;
static int hf_etw_event_property_xml;
static int hf_etw_event_property_forwarded_xml;
static int hf_etw_event_property_legacy_eventlog;
static int hf_etw_event_property_legacy_reloggable;
static int hf_etw_thread_id;
static int hf_etw_process_id;
static int hf_etw_time_stamp;
static int hf_etw_provider_id;
static int hf_etw_buffer_context_processor_number;
static int hf_etw_buffer_context_alignment;
static int hf_etw_buffer_context_logger_id;
static int hf_etw_message_length;
static int hf_etw_provider_name_length;
static int hf_etw_provider_name;
static int hf_etw_message;
static int hf_etw_user_data_length;
static int hf_etw_descriptor_id;
static int hf_etw_descriptor_version;
static int hf_etw_descriptor_channel;
static int hf_etw_descriptor_level;
static int hf_etw_descriptor_opcode;
static int hf_etw_descriptor_task;
static int hf_etw_descriptor_keywords;
static int hf_etw_processor_time;
static int hf_etw_activity_id;
static int ett_etw_header;
static int ett_etw_descriptor;
static int ett_etw_buffer_context;
static int ett_etw_header_flags;
static int ett_etw_event_property_types;
static dissector_handle_t mbim_dissector;
static e_guid_t mbim_net_providerid = { 0xA42FE227, 0xA7BF, 0x4483, {0xA5, 0x02, 0x6B, 0xCD, 0xA4, 0x28, 0xCD, 0x96} };
#define ROUND_UP_COUNT(Count,Pow2) \
( ((Count)+(Pow2)-1) & (~(((int)(Pow2))-1)) )
#define ETW_HEADER_SIZE 0x60
static int etw_counter;
static int
dissect_etw(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree _U_, void* data _U_)
{
proto_tree* etw_header, * etw_descriptor, * etw_buffer_context;
tvbuff_t* mbim_tvb;
uint32_t message_offset, message_length, provider_name_offset, provider_name_length, user_data_offset, user_data_length;
e_guid_t provider_id;
int offset = 0;
static int * const etw_header_flags[] = {
&hf_etw_header_flag_extended_info,
&hf_etw_header_flag_private_session,
&hf_etw_header_flag_string_only,
&hf_etw_header_flag_trace_message,
&hf_etw_header_flag_no_cputime,
&hf_etw_header_flag_32_bit_header,
&hf_etw_header_flag_64_bit_header,
&hf_etw_header_flag_decode_guid,
&hf_etw_header_flag_classic_header,
&hf_etw_header_flag_processor_index,
NULL
};
static int * const etw_event_property_opt[] = {
&hf_etw_event_property_xml,
&hf_etw_event_property_forwarded_xml,
&hf_etw_event_property_legacy_eventlog,
&hf_etw_event_property_legacy_reloggable,
NULL
};
etw_header = proto_tree_add_subtree(tree, tvb, 0, ETW_HEADER_SIZE, ett_etw_header, NULL, "ETW Header");
proto_tree_add_item(etw_header, hf_etw_size, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(etw_header, hf_etw_header_type, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_bitmask(etw_header, tvb, offset, hf_etw_flags,
ett_etw_header_flags, etw_header_flags, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_bitmask(etw_header, tvb, offset, hf_etw_event_property,
ett_etw_event_property_types, etw_event_property_opt, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(etw_header, hf_etw_thread_id, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
proto_tree_add_item(etw_header, hf_etw_process_id, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
proto_tree_add_item(etw_header, hf_etw_time_stamp, tvb, offset, 8, ENC_LITTLE_ENDIAN);
offset += 8;
tvb_get_letohguid(tvb, offset, &provider_id);
proto_tree_add_item(etw_header, hf_etw_provider_id, tvb, offset, 16, ENC_LITTLE_ENDIAN);
offset += 16;
etw_descriptor = proto_tree_add_subtree(etw_header, tvb, 40, 16, ett_etw_descriptor, NULL, "Descriptor");
proto_tree_add_item(etw_descriptor, hf_etw_descriptor_id, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(etw_descriptor, hf_etw_descriptor_version, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
proto_tree_add_item(etw_descriptor, hf_etw_descriptor_channel, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
proto_tree_add_item(etw_descriptor, hf_etw_descriptor_level, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
proto_tree_add_item(etw_descriptor, hf_etw_descriptor_opcode, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
proto_tree_add_item(etw_descriptor, hf_etw_descriptor_task, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(etw_descriptor, hf_etw_descriptor_keywords, tvb, offset, 8, ENC_LITTLE_ENDIAN);
offset += 8;
proto_tree_add_item(etw_header, hf_etw_processor_time, tvb, offset, 8, ENC_LITTLE_ENDIAN);
offset += 8;
proto_tree_add_item(etw_header, hf_etw_activity_id, tvb, offset, 16, ENC_LITTLE_ENDIAN);
offset += 16;
etw_buffer_context = proto_tree_add_subtree(etw_header, tvb, 80, 4, ett_etw_descriptor, NULL, "Buffer Context");
proto_tree_add_item(etw_buffer_context, hf_etw_buffer_context_processor_number, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
proto_tree_add_item(etw_buffer_context, hf_etw_buffer_context_alignment, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
proto_tree_add_item(etw_buffer_context, hf_etw_buffer_context_logger_id, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item_ret_uint(etw_header, hf_etw_user_data_length, tvb, offset, 4, ENC_LITTLE_ENDIAN, &user_data_length);
offset += 4;
proto_tree_add_item_ret_uint(etw_header, hf_etw_message_length, tvb, offset, 4, ENC_LITTLE_ENDIAN, &message_length);
offset += 4;
proto_tree_add_item_ret_uint(etw_header, hf_etw_provider_name_length, tvb, offset, 4, ENC_LITTLE_ENDIAN, &provider_name_length);
offset += 4;
user_data_offset = offset;
message_offset = user_data_offset + ROUND_UP_COUNT(user_data_length, sizeof(int32_t));
if (message_length) {
proto_tree_add_item(etw_header, hf_etw_message, tvb, message_offset, message_length, ENC_LITTLE_ENDIAN | ENC_UTF_16);
}
provider_name_offset = message_offset + ROUND_UP_COUNT(message_length, sizeof(int32_t));
if (provider_name_length) {
proto_tree_add_item(etw_header, hf_etw_provider_name, tvb, provider_name_offset, provider_name_length, ENC_LITTLE_ENDIAN | ENC_UTF_16);
}
col_set_str(pinfo->cinfo, COL_DEF_SRC, "windows");
col_set_str(pinfo->cinfo, COL_DEF_DST, "windows");
if (memcmp(&mbim_net_providerid, &provider_id, sizeof(e_guid_t)) == 0) {
uint32_t pack_flags;
if (WTAP_OPTTYPE_SUCCESS == wtap_block_get_uint32_option_value(pinfo->rec->block, OPT_PKT_FLAGS, &pack_flags)) {
switch(PACK_FLAGS_DIRECTION(pack_flags)) {
case PACK_FLAGS_DIRECTION_INBOUND:
col_set_str(pinfo->cinfo, COL_DEF_SRC, "device");
col_set_str(pinfo->cinfo, COL_DEF_DST, "host");
break;
case PACK_FLAGS_DIRECTION_OUTBOUND:
col_set_str(pinfo->cinfo, COL_DEF_SRC, "host");
col_set_str(pinfo->cinfo, COL_DEF_DST, "device");
break;
}
}
mbim_tvb = tvb_new_subset_remaining(tvb, user_data_offset);
call_dissector_only(mbim_dissector, mbim_tvb, pinfo, tree, data);
}
else if (message_length){
char* message = (char*)tvb_get_string_enc(pinfo->pool, tvb, message_offset, message_length, ENC_LITTLE_ENDIAN | ENC_UTF_16);
col_set_str(pinfo->cinfo, COL_INFO, message);
if (provider_name_offset) {
char* provider_name = (char*)tvb_get_string_enc(pinfo->pool, tvb, provider_name_offset, provider_name_length, ENC_LITTLE_ENDIAN | ENC_UTF_16);
col_set_str(pinfo->cinfo, COL_PROTOCOL, provider_name);
}
} else {
col_set_str(pinfo->cinfo, COL_INFO, guids_resolve_guid_to_str(&provider_id, pinfo->pool));
}
etw_counter += 1;
return tvb_captured_length(tvb);
}
void
proto_register_etw(void)
{
static hf_register_info hf[] = {
{ &hf_etw_size,
{ "Size", "etw.size",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_header_type,
{ "Header Type", "etw.header_type",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_flags,
{ "Flags", "etw.flags",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_header_flag_extended_info,
{ "Extended Info", "etw.header.flag.extended_info",
FT_UINT32, BASE_DEC, NULL, 0x0001,
NULL, HFILL }
},
{ &hf_etw_header_flag_private_session,
{ "Private Session", "etw.header.flag.private_session",
FT_UINT32, BASE_DEC, NULL, 0x0002,
NULL, HFILL }
},
{ &hf_etw_header_flag_string_only,
{ "String Only", "etw.header.flag.string_only",
FT_UINT32, BASE_DEC, NULL, 0x0004,
NULL, HFILL }
},
{ &hf_etw_header_flag_trace_message,
{ "Trace Message", "etw.header.flag.trace_message",
FT_UINT32, BASE_DEC, NULL, 0x0008,
NULL, HFILL }
},
{ &hf_etw_header_flag_no_cputime,
{ "No CPU time", "etw.header.flag.no_cputime",
FT_UINT32, BASE_DEC, NULL, 0x0010,
NULL, HFILL }
},
{ &hf_etw_header_flag_32_bit_header,
{ "32-bit Header", "etw.header.flag.32_bit_header",
FT_UINT32, BASE_DEC, NULL, 0x0020,
NULL, HFILL }
},
{ &hf_etw_header_flag_64_bit_header,
{ "64-bit Header", "etw.header.flag.64_bit_header",
FT_UINT32, BASE_DEC, NULL, 0x0040,
NULL, HFILL }
},
{ &hf_etw_header_flag_decode_guid,
{ "Decode GUID", "etw.header.flag.decode_guid",
FT_UINT32, BASE_DEC, NULL, 0x0080,
NULL, HFILL }
},
{ &hf_etw_header_flag_classic_header,
{ "Classic Header", "etw.header.flag.classic_header",
FT_UINT32, BASE_DEC, NULL, 0x0100,
NULL, HFILL }
},
{ &hf_etw_header_flag_processor_index,
{ "Processor Index", "etw.header.flag.processor_index",
FT_UINT32, BASE_DEC, NULL, 0x0200,
NULL, HFILL }
},
{ &hf_etw_event_property,
{ "Event Property", "etw.event_property",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_event_property_xml,
{ "XML", "etw.property.xml",
FT_UINT32, BASE_DEC, NULL, 0x0001,
NULL, HFILL }
},
{ &hf_etw_event_property_forwarded_xml,
{ "Forwarded XML", "etw.property.forwarded_xml",
FT_UINT32, BASE_DEC, NULL, 0x0002,
NULL, HFILL }
},
{ &hf_etw_event_property_legacy_eventlog,
{ "Legacy Event Log", "etw.property.legacy_event",
FT_UINT32, BASE_DEC, NULL, 0x0004,
NULL, HFILL }
},
{ &hf_etw_event_property_legacy_reloggable,
{ "Legacy Reloggable", "etw.property.legacy_reloggable",
FT_UINT32, BASE_DEC, NULL, 0x0008,
NULL, HFILL }
},
{ &hf_etw_thread_id,
{ "Thread ID", "etw.thread_id",
FT_UINT32, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_process_id,
{ "Process ID", "etw.process_id",
FT_UINT32, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_time_stamp,
{ "Time Stamp", "etw.time_stamp",
FT_UINT64, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_provider_id,
{ "Provider ID", "etw.provider_id",
FT_GUID, BASE_NONE, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_buffer_context_processor_number,
{ "Processor Number", "etw.buffer_context.processor_number",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_buffer_context_alignment,
{ "Alignment", "etw.buffer_context.alignment",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_buffer_context_logger_id,
{ "ID", "etw.buffer_context.logger_id",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_message_length,
{ "Message Length", "etw.message_length",
FT_UINT32, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_provider_name_length,
{ "Provider Name Length", "etw.provider_name_length",
FT_UINT32, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_provider_name,
{ "Provider Name", "etw.provider_name",
FT_STRINGZ, BASE_NONE, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_message,
{ "Event Message", "etw.message",
FT_STRINGZ, BASE_NONE, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_user_data_length,
{ "User Data Length", "etw.user_data_length",
FT_UINT32, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_descriptor_id,
{ "ID", "etw.descriptor.id",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_descriptor_version,
{ "Version", "etw.descriptor.version",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_descriptor_channel,
{ "Channel", "etw.descriptor.channel",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_descriptor_level,
{ "Level", "etw.descriptor.level",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_descriptor_opcode,
{ "Opcode", "etw.descriptor.opcode",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_descriptor_task,
{ "Task", "etw.descriptor.task",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_descriptor_keywords,
{ "Keywords", "etw.descriptor.keywords",
FT_UINT64, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_processor_time,
{ "Processor Time", "etw.processor_time",
FT_UINT64, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_etw_activity_id,
{ "Activity ID", "etw.activity_id",
FT_GUID, BASE_NONE, NULL, 0,
NULL, HFILL }
}
};
static int *ett[] = {
&ett_etw_header,
&ett_etw_descriptor,
&ett_etw_buffer_context,
&ett_etw_header_flags,
&ett_etw_event_property_types
};
proto_etw = proto_register_protocol("Event Tracing for Windows", "ETW", "etw");
proto_register_field_array(proto_etw, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
etw_handle = register_dissector("etw", dissect_etw, proto_etw);
}
void
proto_reg_handoff_etw(void)
{
dissector_add_uint("wtap_encap", WTAP_ENCAP_ETW, etw_handle);
mbim_dissector = find_dissector("mbim.control");
}
/*
* Editor modelines - https://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:
*/
|
