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
|
/* packet-sdh.c
* Routines for SDH/SONET encapsulation dissection
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 - 2012 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/prefs.h>
#include <wiretap/wtap.h>
#include "packet-erf.h"
#define COLUMNS 270
#define EXT_HDR_TYPE_RAW_LINK 5
void proto_register_sdh(void);
void proto_reg_handoff_sdh(void);
static int proto_sdh = -1;
static gint ett_sdh = -1;
static int hf_sdh_a1 = -1;
static int hf_sdh_a2 = -1;
static int hf_sdh_j0 = -1;
static int hf_sdh_b1 = -1;
static int hf_sdh_e1 = -1;
static int hf_sdh_f1 = -1;
static int hf_sdh_d1 = -1;
static int hf_sdh_d2 = -1;
static int hf_sdh_d3 = -1;
static int hf_sdh_au = -1;
static int hf_sdh_b2 = -1;
static int hf_sdh_k1 = -1;
static int hf_sdh_k2 = -1;
static int hf_sdh_d4 = -1;
static int hf_sdh_d5 = -1;
static int hf_sdh_d6 = -1;
static int hf_sdh_d7 = -1;
static int hf_sdh_d8 = -1;
static int hf_sdh_d9 = -1;
static int hf_sdh_d10 = -1;
static int hf_sdh_d11 = -1;
static int hf_sdh_d12 = -1;
static int hf_sdh_s1 = -1;
static int hf_sdh_m1 = -1;
static int hf_sdh_e2 = -1;
static int hf_sdh_h1 = -1;
static int hf_sdh_h2 = -1;
static int hf_sdh_j1 = -1;
static dissector_handle_t sdh_handle;
static gint sdh_data_rate = 1;
static const enum_val_t data_rates[] = {
{"Attempt to guess", "Attempt to guess", -1},
{"OC-3", "OC-3", 1},
{"OC-12", "OC-12", 4},
{"OC-24", "OC-24", 8},
{"OC-48", "OC-48", 16},
{NULL, NULL, -1}
};
static const value_string sdh_s1_vals[] = {
{ 0, "Quality unknown" },
{ 1, "Reserved" },
{ 2, "Rec G.811" },
{ 3, "Reserved" },
{ 4, "SSU-A" },
{ 5, "Reserved" },
{ 6, "Reserved" },
{ 7, "Reserved" },
{ 8, "SSU-B" },
{ 9, "Reserved" },
{ 10, "Reserved" },
{ 11, "SDH Equipment Source" },
{ 12, "Reserved" },
{ 13, "Reserved" },
{ 14, "Reserved" },
{ 15, "do not use for sync" },
{ 0, NULL }
};
static int
get_sdh_level(tvbuff_t *tvb, packet_info *pinfo)
{
guint64 *hdr = NULL;
/*data rate has been set in the SDH options*/
if(sdh_data_rate != -1) return sdh_data_rate;
/*ERF specifies data rate*/
hdr = erf_get_ehdr(pinfo, EXT_HDR_TYPE_RAW_LINK, NULL);
if (hdr != NULL){
switch((*hdr & 0xff00) >> 8){
case 1: /*OC-3*/
return 1;
case 2: /*OC-12*/
return 4;
case 3: /*OC-48*/
return 16;
default: /*drop through and try the next method*/
;
}
}
/*returns the multiplier for each data level*/
switch(tvb_reported_length(tvb)){
case 2430: /*OC-3*/
return 1;
case 9720: /*OC-12*/
return 4;
case 19440: /*OC-24*/
return 8;
case 38880: /*OC-48*/
return 16;
}
return 1;
}
static int
dissect_sdh(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
col_set_str(pinfo->cinfo, COL_PROTOCOL, "SDH");
col_clear(pinfo->cinfo,COL_INFO);
if (tree) {
proto_tree *sdh_tree;
proto_item *sdh_item;
int level = get_sdh_level(tvb, pinfo);
guint8 h1;
guint8 h2;
guint16 au;
int auoffset;
sdh_item = proto_tree_add_protocol_format(tree, proto_sdh, tvb, 0, -1, "SDH");
sdh_tree = proto_item_add_subtree(sdh_item, ett_sdh);
h1 = tvb_get_guint8(tvb, 0*level+(3*level*COLUMNS));
h2 = tvb_get_guint8(tvb, 3*level+(3*level*COLUMNS));
au = (h2 | ((0x03 & h1) << 8));
proto_tree_add_item(sdh_tree, hf_sdh_a1, tvb, 0*level, 3*level, ENC_NA);
proto_tree_add_item(sdh_tree, hf_sdh_a2, tvb, 3*level, 3*level, ENC_NA);
proto_tree_add_item(sdh_tree, hf_sdh_j0, tvb, 6*level, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_b1, tvb, 0*level+(1*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_e1, tvb, 3*level+(1*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_f1, tvb, 6*level+(1*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d1, tvb, 0*level+(2*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d2, tvb, 3*level+(2*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d3, tvb, 6*level+(2*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_h1, tvb, 0*level+(3*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_h2, tvb, 3*level+(3*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_uint(sdh_tree, hf_sdh_au, tvb, 0*level+(3*level*COLUMNS), 3*level+1, au);
proto_tree_add_item(sdh_tree, hf_sdh_b2, tvb, 0*level+(4*level*COLUMNS), 3*level, ENC_NA);
proto_tree_add_item(sdh_tree, hf_sdh_k1, tvb, 3*level+(4*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_k2, tvb, 6*level+(4*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d4, tvb, 0*level+(5*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d5, tvb, 3*level+(5*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d6, tvb, 6*level+(5*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d7, tvb, 0*level+(6*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d8, tvb, 3*level+(6*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d9, tvb, 6*level+(6*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d10, tvb, 0*level+(7*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d11, tvb, 3*level+(7*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d12, tvb, 6*level+(7*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_s1, tvb, 0*level+(8*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_m1, tvb, 3*level+2+(8*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_e2, tvb, 6*level+(8*level*COLUMNS), 1, ENC_BIG_ENDIAN);
/*XXX: POH that au points to may not be in the same frame. Also wrong on pointer justification*/
/*calculate start of SPE by wrapping AU pointer*/
auoffset = (((9 + 3*COLUMNS) /*start after H3*/ + au*3 + 9*(au/87) /*add extra SOH rows to offset*/) * level) % (COLUMNS*9*level);
proto_tree_add_item(sdh_tree, hf_sdh_j1, tvb, auoffset, 1, ENC_BIG_ENDIAN);
}
return tvb_captured_length(tvb);
}
void
proto_register_sdh(void)
{
static hf_register_info hf[] = {
{ &hf_sdh_a1,
{ "A1", "sdh.a1", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_a2,
{ "A2", "sdh.a2", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_j0,
{ "J0", "sdh.j0", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_b1,
{ "B1", "sdh.b1", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_e1,
{ "E1", "sdh.e1", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_f1,
{ "F1", "sdh.f1", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d1,
{ "D1", "sdh.d1", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d2,
{ "D2", "sdh.d2", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d3,
{ "D3", "sdh.d3", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_au,
{ "AU", "sdh.au", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_b2,
{ "B2", "sdh.b2", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_k1,
{ "K1", "sdh.k1", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_k2,
{ "K2", "sdh.k2", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d4,
{ "D4", "sdh.d4", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d5,
{ "D5", "sdh.d5", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d6,
{ "D6", "sdh.d6", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d7,
{ "D7", "sdh.d7", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d8,
{ "D8", "sdh.d8", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d9,
{ "D9", "sdh.d9", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d10,
{ "D10", "sdh.d10", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d11,
{ "D11", "sdh.d11", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d12,
{ "D12", "sdh.d12", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_s1,
{ "S1", "sdh.s1", FT_UINT8, BASE_HEX, VALS(sdh_s1_vals), 0x0, NULL, HFILL }},
{ &hf_sdh_m1,
{ "M1", "sdh.m1", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_e2,
{ "E2", "sdh.e2", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_j1,
{ "J1", "sdh.j1", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_h1,
{ "H1", "sdh.h1", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_h2,
{ "H2", "sdh.h2", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
};
static gint *ett[] = {
&ett_sdh,
};
module_t *sdh_module;
proto_sdh = proto_register_protocol("SDH/SONET Protocol", "SDH", "sdh");
proto_register_field_array(proto_sdh, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
sdh_module = prefs_register_protocol(proto_sdh, NULL);
prefs_register_enum_preference(sdh_module, "data.rate",
"Data rate",
"Data rate",
&sdh_data_rate, data_rates, ENC_BIG_ENDIAN);
sdh_handle = register_dissector("sdh", dissect_sdh, proto_sdh);
}
void
proto_reg_handoff_sdh(void)
{
dissector_add_uint("wtap_encap", WTAP_ENCAP_SDH, sdh_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
|
