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
|
/* packet-extreme-internal-eth.c
* Routines for the disassembly of Extreme Networks internal
* Ethernet capture headers
*
* Copyright 2021 Joerg Mayer (see AUTHORS file)
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/*
* It is possible to create internal capture in EXOS with
* debug packet capture ...
*
* List of interfaces on all VRs:
* run script shell.py cat /proc/net/dev
* on older software the following should work as well:
* debug packet capture on cmd-args "-D -1"
*
* See:
* https://extremeportal.force.com/ExtrArticleDetail?an=000079573
* https://extremeportal.force.com/ExtrArticleDetail?an=000082238
* https://extremeportal.force.com/ExtrArticleDetail?an=000079220
*
* This capture begins with an internal header (maybe containing some HiGig variant?),
* followed by the "original" Ethernet frame.
*/
/*
* TODO
* 00 - 01: Unknown
* always zero for incoming(?)
* often non-zero for outgoing
* 10 - 23: Unknown (traffic properties?)
* 28 - 29: Unknown
* always zero(?)
* 32 - 33: Unknown
* always zero(?)
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/etypes.h>
#include <epan/expert.h>
void proto_register_exeh(void);
void proto_reg_handoff_exeh(void);
static dissector_handle_t exeh_handle;
static dissector_handle_t ethnofcs_handle;
static int proto_exeh = -1;
/* EXEH data */
static int hf_exeh_unknown_00_01 = -1;
static int hf_exeh_module1 = -1;
static int hf_exeh_port1 = -1;
static int hf_exeh_module2 = -1; /* m2 + p2 always zero for outgoing(?) */
static int hf_exeh_port2 = -1;
static int hf_exeh_unknown_10_16 = -1;
static int hf_exeh_unknown_17_0xfd = -1;
static int hf_exeh_unknown_17_0x02 = -1;
static int hf_exeh_unknown_18_21 = -1;
static int hf_exeh_unknown_22_23 = -1;
static int hf_exeh_incoming_framesource = -1;
static int hf_exeh_outgoing_framesource = -1;
static int hf_exeh_vlan = -1;
static int hf_exeh_unknown_28_29 = -1;
static int hf_exeh_dir = -1;
static int hf_exeh_unknown_32_33 = -1;
static int hf_exeh_etype = -1;
static int hf_exeh_etypelen = -1;
static int hf_exeh_etypedata = -1;
static expert_field ei_exeh_unexpected_value = EI_INIT;
static expert_field ei_exeh_unequal_ports = EI_INIT;
static expert_field ei_exeh_incoming_framesource = EI_INIT;
static expert_field ei_exeh_outgoing_framesource = EI_INIT;
static gint ett_exeh = -1;
#define PROTO_SHORT_NAME "EXEH"
#define PROTO_LONG_NAME "EXtreme extra Eth Header"
static const value_string exeh_direction_vals[] = {
{0x07, "Incoming"},
{0xff, "Outgoing"},
{0, NULL},
};
static const value_string exeh_outgoing_vlanid_vals[] = {
{0x0000, "No tag or VLAN ID = 0"},
{0x000f, "Has VLAN ID"},
{0, NULL},
};
static const value_string exeh_incoming_framesource_vals[] = {
{0x0000, "N/A"},
{0, NULL},
};
static const value_string exeh_outgoing_framesource_vals[] = {
{0x0000, "CPU"},
{0x4248, "Broadcom Hardware"},
{0, NULL},
};
static int
dissect_exeh(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_item *ti;
proto_tree *exeh_tree;
guint32 offset = 0;
guint32 etype, module1, port1, module2, port2, direction, framesource;
gint32 databytes;
tvbuff_t *frame_tvb;
col_set_str(pinfo->cinfo, COL_PROTOCOL, PROTO_SHORT_NAME);
col_set_str(pinfo->cinfo, COL_INFO, PROTO_SHORT_NAME ":");
ti = proto_tree_add_item(tree, proto_exeh, tvb, offset, -1,
ENC_NA);
exeh_tree = proto_item_add_subtree(ti, ett_exeh);
direction = tvb_get_ntohs(tvb, 30);
proto_tree_add_item(exeh_tree, hf_exeh_unknown_00_01, tvb, offset, 2, ENC_NA);
offset += 2;
proto_tree_add_item_ret_uint(exeh_tree, hf_exeh_module1, tvb, offset, 2, ENC_BIG_ENDIAN, &module1);
offset += 2;
proto_tree_add_item_ret_uint(exeh_tree, hf_exeh_port1, tvb, offset, 2, ENC_BIG_ENDIAN, &port1);
offset += 2;
proto_tree_add_item_ret_uint(exeh_tree, hf_exeh_module2, tvb, offset, 2, ENC_BIG_ENDIAN, &module2);
offset += 2;
ti = proto_tree_add_item_ret_uint(exeh_tree, hf_exeh_port2, tvb, offset, 2, ENC_BIG_ENDIAN, &port2);
if ( !(direction == 255 && module2 == 0) && (module1 != module2 || port1 != port2) )
expert_add_info(pinfo, ti, &ei_exeh_unequal_ports);
offset += 2;
proto_tree_add_item(exeh_tree, hf_exeh_unknown_10_16, tvb, offset, 7, ENC_NA);
offset += 7;
proto_tree_add_item(exeh_tree, hf_exeh_unknown_17_0xfd, tvb, offset, 1, ENC_NA);
proto_tree_add_item(exeh_tree, hf_exeh_unknown_17_0x02, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(exeh_tree, hf_exeh_unknown_18_21, tvb, offset, 4, ENC_NA);
offset += 4;
proto_tree_add_item(exeh_tree, hf_exeh_unknown_22_23, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
if ( direction == 7 ) {
ti = proto_tree_add_item_ret_uint(exeh_tree, hf_exeh_incoming_framesource, tvb, offset, 2, ENC_BIG_ENDIAN, &framesource);
if ( framesource != 0 )
expert_add_info(pinfo, ti, &ei_exeh_incoming_framesource);
} else { /* Direction == 255 */
ti = proto_tree_add_item_ret_uint(exeh_tree, hf_exeh_outgoing_framesource, tvb, offset, 2, ENC_BIG_ENDIAN, &framesource);
if ( framesource != 0 && framesource != 0x4248 )
expert_add_info(pinfo, ti, &ei_exeh_outgoing_framesource);
}
offset += 2;
proto_tree_add_item(exeh_tree, hf_exeh_vlan, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(exeh_tree, hf_exeh_unknown_28_29, tvb, offset, 2, ENC_NA);
offset += 2;
proto_tree_add_item(exeh_tree, hf_exeh_dir, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(exeh_tree, hf_exeh_unknown_32_33, tvb, offset, 2, ENC_NA);
offset += 2;
proto_tree_add_item_ret_uint(exeh_tree, hf_exeh_etype, tvb, offset, 2, ENC_BIG_ENDIAN, &etype);
switch (etype) {
case 0x8100: /* VLAN/VMAN Tag */
ti = proto_tree_add_item_ret_int(exeh_tree, hf_exeh_etypelen, tvb, offset+2, 2, ENC_BIG_ENDIAN, &databytes);
if (tvb_reported_length_remaining(tvb, offset) != databytes)
expert_add_info(pinfo, ti, &ei_exeh_unexpected_value);
break;
default:
proto_tree_add_item(exeh_tree, hf_exeh_etypedata, tvb, offset+2, 2, ENC_BIG_ENDIAN);
}
offset += 4;
frame_tvb = tvb_new_subset_remaining(tvb, offset);
call_dissector(ethnofcs_handle, frame_tvb, pinfo, tree);
return tvb_captured_length(tvb);
}
void
proto_register_exeh(void)
{
static hf_register_info hf[] = {
/* EXEH data */
{ &hf_exeh_unknown_00_01,
{ "Unknown_00", "exeh.unknown00", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL }},
{ &hf_exeh_module1,
{ "Module", "exeh.module1", FT_UINT16, BASE_DEC, NULL,
0x0, NULL, HFILL }},
{ &hf_exeh_port1,
{ "Port", "exeh.port1", FT_UINT16, BASE_DEC, NULL,
0x0, NULL, HFILL }},
{ &hf_exeh_module2,
{ "Module", "exeh.module2", FT_UINT16, BASE_DEC, NULL,
0x0, NULL, HFILL }},
{ &hf_exeh_port2,
{ "Port", "exeh.port2", FT_UINT16, BASE_DEC, NULL,
0x0, NULL, HFILL }},
{ &hf_exeh_unknown_10_16,
{ "Unknown_10 (incoming specific?)", "exeh.unknown10", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL }},
{ &hf_exeh_unknown_17_0xfd,
{ "Unknown_17", "exeh.unknown17", FT_UINT8, BASE_HEX, NULL,
0xfd, NULL, HFILL }},
{ &hf_exeh_unknown_17_0x02,
{ "Unknown_17 (Add dot1Q?)", "exeh.unknown17.dot1q", FT_BOOLEAN, 8, TFS(&tfs_no_yes),
0x02, NULL, HFILL }},
{ &hf_exeh_unknown_18_21,
{ "Unknown_18 (outgoing specific?)", "exeh.unknown18", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL }},
{ &hf_exeh_unknown_22_23,
{ "Add VLAN ID?", "exeh.unknown22", FT_UINT16, BASE_NONE, VALS(exeh_outgoing_vlanid_vals),
0x0, NULL, HFILL }},
{ &hf_exeh_incoming_framesource,
{ "Frame source", "exeh.framesource", FT_UINT16, BASE_HEX, VALS(exeh_incoming_framesource_vals),
0x0, NULL, HFILL }},
{ &hf_exeh_outgoing_framesource,
{ "Frame source", "exeh.framesource", FT_UINT16, BASE_HEX, VALS(exeh_outgoing_framesource_vals),
0x0, NULL, HFILL }},
{ &hf_exeh_vlan,
{ "Transport VLAN", "exeh.vlan", FT_UINT16, BASE_DEC, NULL,
0x0, NULL, HFILL }},
{ &hf_exeh_unknown_28_29,
{ "Unknown_28", "exeh.unknown28", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL }},
{ &hf_exeh_dir,
{ "Direction", "exeh.direction", FT_UINT16, BASE_HEX, VALS(exeh_direction_vals),
0x0, NULL, HFILL }},
{ &hf_exeh_unknown_32_33,
{ "Unknown_32", "exeh.unknown32", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL }},
{ &hf_exeh_etype,
{ "Etype", "exeh.etype", FT_UINT16, BASE_HEX, NULL,
0x0, NULL, HFILL }},
{ &hf_exeh_etypedata,
{ "Etype data", "exeh.etypedata", FT_UINT16, BASE_HEX, NULL,
0x0, NULL, HFILL }},
{ &hf_exeh_etypelen,
{ "Length", "exeh.etypelen", FT_INT16, BASE_DEC, NULL,
0x0, "Bytes from 8100 to end of frame", HFILL }},
};
static gint *ett[] = {
&ett_exeh,
};
static ei_register_info ei[] = {
{ &ei_exeh_unexpected_value, { "exeh.unexpected_value", PI_PROTOCOL, PI_WARN, "Unexpected length", EXPFILL }},
{ &ei_exeh_unequal_ports, { "exeh.unequal_ports", PI_PROTOCOL, PI_WARN, "Unequal ports", EXPFILL }},
{ &ei_exeh_incoming_framesource, { "exeh.incoming_framesource", PI_PROTOCOL, PI_WARN, "Incoming framesource non-zero", EXPFILL }},
{ &ei_exeh_outgoing_framesource, { "exeh.outgoing_framesource", PI_PROTOCOL, PI_WARN, "Outgoing framesource unknown magic", EXPFILL }},
};
expert_module_t* expert_exeh;
proto_exeh = proto_register_protocol(PROTO_LONG_NAME, PROTO_SHORT_NAME, "exeh");
proto_register_field_array(proto_exeh, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_exeh = expert_register_protocol(proto_exeh);
expert_register_field_array(expert_exeh, ei, array_length(ei));
exeh_handle = register_dissector("exeh", dissect_exeh, proto_exeh);
}
void
proto_reg_handoff_exeh(void)
{
ethnofcs_handle = find_dissector_add_dependency("eth_withoutfcs", proto_exeh);
dissector_add_uint("ethertype", ETHERTYPE_EXEH, exeh_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
|
