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
|
/* packet-dvb-bat.c
* Routines for DVB (ETSI EN 300 468) Bouquet Association Table (BAT) dissection
* Copyright 2012, Guy Martin <gmsoft@tuxicoman.be>
*
* $Id$
*
* 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; bather 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glib.h>
#include <epan/packet.h>
#include <epan/dissectors/packet-mpeg-sect.h>
#include "packet-mpeg-descriptor.h"
static int proto_dvb_bat = -1;
static int hf_dvb_bat_bouquet_id = -1;
static int hf_dvb_bat_reserved1 = -1;
static int hf_dvb_bat_version_number = -1;
static int hf_dvb_bat_current_next_indicator = -1;
static int hf_dvb_bat_section_number = -1;
static int hf_dvb_bat_last_section_number = -1;
static int hf_dvb_bat_reserved2 = -1;
static int hf_dvb_bat_bouquet_descriptors_length = -1;
static int hf_dvb_bat_reserved3 = -1;
static int hf_dvb_bat_transport_stream_loop_length = -1;
static int hf_dvb_bat_transport_stream_id = -1;
static int hf_dvb_bat_original_network_id = -1;
static int hf_dvb_bat_reserved4 = -1;
static int hf_dvb_bat_transport_descriptors_length = -1;
static gint ett_dvb_bat = -1;
static gint ett_dvb_bat_transport_stream = -1;
#define DVB_BAT_TID 0x4A
#define DVB_BAT_RESERVED1_MASK 0xC0
#define DVB_BAT_VERSION_NUMBER_MASK 0x3E
#define DVB_BAT_CURRENT_NEXT_INDICATOR_MASK 0x01
#define DVB_BAT_RESERVED2_MASK 0xF000
#define DVB_BAT_BOUQUET_DESCRIPTORS_LENGTH_MASK 0x0FFF
#define DVB_BAT_RESERVED3_MASK 0xF000
#define DVB_BAT_TRANSPORT_STREAM_LOOP_LENGTH_MASK 0x0FFF
#define DVB_BAT_RESERVED4_MASK 0xF000
#define DVB_BAT_TRANSPORT_DESCRIPTORS_LENGTH_MASK 0x0FFF
static const value_string dvb_bat_cur_next_vals[] = {
{ 0, "Not yet applicable" },
{ 1, "Currently applicable" },
{ 0, NULL }
};
static const value_string dvb_bat_running_status_vals[] = {
{ 0, "Undefined" },
{ 1, "Not Running" },
{ 2, "Starts in a few seconds" },
{ 3, "Pausing" },
{ 4, "Running" },
{ 5, "Service off-air" },
{ 0, NULL }
};
static const value_string dvb_bat_free_ca_mode_vals[] = {
{ 0, "Not Scrambled" },
{ 1, "One or more component scrambled" },
{ 0, NULL }
};
static void
dissect_dvb_bat(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint offset = 0, length = 0, descriptor_end = 0, ts_loop_end = 0;
guint16 ts_id = 0, descriptor_len = 0, ts_loop_len = 0;
proto_item *ti = NULL;
proto_tree *dvb_bat_tree = NULL;
proto_item *tsi = NULL;
proto_tree *transport_stream_tree = NULL;
col_clear(pinfo->cinfo, COL_INFO);
col_set_str(pinfo->cinfo, COL_INFO, "Bouquet Association Table (BAT)");
if (!tree)
return;
ti = proto_tree_add_item(tree, proto_dvb_bat, tvb, offset, -1, ENC_NA);
dvb_bat_tree = proto_item_add_subtree(ti, ett_dvb_bat);
offset += packet_mpeg_sect_header(tvb, offset, dvb_bat_tree, &length, NULL);
length -= 4;
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_bouquet_id, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_reserved1, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_version_number, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_current_next_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
descriptor_len = tvb_get_ntohs(tvb, offset) & DVB_BAT_BOUQUET_DESCRIPTORS_LENGTH_MASK;
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_reserved2, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_bouquet_descriptors_length, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
descriptor_end = offset + descriptor_len;
while (offset < descriptor_end)
offset += proto_mpeg_descriptor_dissect(tvb, offset, dvb_bat_tree);
ts_loop_len = tvb_get_ntohs(tvb, offset) & DVB_BAT_TRANSPORT_STREAM_LOOP_LENGTH_MASK;
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_reserved3, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_transport_stream_loop_length, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
ts_loop_end = offset + ts_loop_len;
while (offset < ts_loop_end) {
ts_id = tvb_get_ntohs(tvb, offset);
descriptor_len = tvb_get_ntohs(tvb, offset + 4) & DVB_BAT_TRANSPORT_DESCRIPTORS_LENGTH_MASK;
tsi = proto_tree_add_text(dvb_bat_tree, tvb, offset, 6 + descriptor_len, "Transport Stream 0x%04x", ts_id);
transport_stream_tree = proto_item_add_subtree(tsi, ett_dvb_bat_transport_stream);
proto_tree_add_item(transport_stream_tree, hf_dvb_bat_transport_stream_id, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(transport_stream_tree, hf_dvb_bat_original_network_id, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(transport_stream_tree, hf_dvb_bat_reserved4, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(transport_stream_tree, hf_dvb_bat_transport_descriptors_length, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
descriptor_end = offset + descriptor_len;
while (offset < descriptor_end)
offset += proto_mpeg_descriptor_dissect(tvb, offset, transport_stream_tree);
}
packet_mpeg_sect_crc(tvb, pinfo, dvb_bat_tree, 0, offset);
}
void
proto_register_dvb_bat(void)
{
static hf_register_info hf[] = {
{ &hf_dvb_bat_bouquet_id, {
"Service ID", "dvb_bat.sid",
FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
} },
{ &hf_dvb_bat_reserved1, {
"Reserved", "dvb_bat.reserved1",
FT_UINT8, BASE_HEX, NULL, DVB_BAT_RESERVED1_MASK, NULL, HFILL
} },
{ &hf_dvb_bat_version_number, {
"Version Number", "dvb_bat.version",
FT_UINT8, BASE_HEX, NULL, DVB_BAT_VERSION_NUMBER_MASK, NULL, HFILL
} },
{ &hf_dvb_bat_current_next_indicator, {
"Current/Next Indicator", "dvb_bat.cur_next_ind",
FT_UINT8, BASE_DEC, VALS(dvb_bat_cur_next_vals), DVB_BAT_CURRENT_NEXT_INDICATOR_MASK, NULL, HFILL
} },
{ &hf_dvb_bat_section_number, {
"Section Number", "dvb_bat.sect_num",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
} },
{ &hf_dvb_bat_last_section_number, {
"Last Section Number", "dvb_bat.last_sect_num",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
} },
{ &hf_dvb_bat_reserved2, {
"Reserved", "dvb_bat.reserved2",
FT_UINT16, BASE_HEX, NULL, DVB_BAT_RESERVED2_MASK, NULL, HFILL
} },
{ &hf_dvb_bat_bouquet_descriptors_length, {
"Bouquet Descriptors Length", "dvb_bat.bouquet_desc_len",
FT_UINT16, BASE_DEC, NULL, DVB_BAT_BOUQUET_DESCRIPTORS_LENGTH_MASK, NULL, HFILL
} },
{ &hf_dvb_bat_reserved3, {
"Reserved", "dvb_bat.reserved3",
FT_UINT16, BASE_HEX, NULL, DVB_BAT_RESERVED3_MASK, NULL, HFILL
} },
{ &hf_dvb_bat_transport_stream_loop_length, {
"Transport Stream Loop Length", "dvb_bat.ts_loop_len",
FT_UINT16, BASE_DEC, NULL, DVB_BAT_TRANSPORT_STREAM_LOOP_LENGTH_MASK, NULL, HFILL
} },
{ &hf_dvb_bat_transport_stream_id, {
"Transport Stream ID", "dvb_bat.ts.id",
FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
} },
{ &hf_dvb_bat_original_network_id, {
"Original Network ID", "dvb_bat.ts.original_nid",
FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
} },
{ &hf_dvb_bat_reserved4, {
"Reserved", "dvb_bat.ts.reserved",
FT_UINT16, BASE_HEX, NULL, DVB_BAT_RESERVED4_MASK, NULL, HFILL
} },
{ &hf_dvb_bat_transport_descriptors_length, {
"Bouquet Descriptors Length", "dvb_bat.ts.desc_len",
FT_UINT16, BASE_DEC, NULL, DVB_BAT_BOUQUET_DESCRIPTORS_LENGTH_MASK, NULL, HFILL
} },
};
static gint *ett[] = {
&ett_dvb_bat,
&ett_dvb_bat_transport_stream
};
proto_dvb_bat = proto_register_protocol("DVB Bouquet Association Table", "DVB BAT", "dvb_bat");
proto_register_field_array(proto_dvb_bat, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void proto_reg_handoff_dvb_bat(void)
{
dissector_handle_t dvb_bat_handle;
dvb_bat_handle = create_dissector_handle(dissect_dvb_bat, proto_dvb_bat);
dissector_add_uint("mpeg_sect.tid", DVB_BAT_TID, dvb_bat_handle);
}
|
