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
|
/* packet-jpeg.c
*
* Routines for RFC 2435 JPEG dissection
*
* Copyright 2006
* Erwin Rol <erwin@erwinrol.com>
* Copyright 2001,
* Francisco Javier Cabello Torres, <fjcabello@vtools.es>
*
* 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.
*/
#define NEW_PROTO_TREE_API
#include "config.h"
#include <epan/packet.h>
#include <epan/rtp_pt.h>
#include "packet-ber.h"
void proto_register_jpeg(void);
void proto_reg_handoff_jpeg(void);
static dissector_handle_t jpeg_handle;
static header_field_info *hfi_jpeg = NULL;
#define JPEG_HFI_INIT HFI_INIT(proto_jpeg)
/* JPEG header fields */
static header_field_info hfi_rtp_jpeg_main_hdr JPEG_HFI_INIT = {
"Main Header",
"jpeg.main_hdr",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL
};
static header_field_info hfi_rtp_jpeg_main_hdr_ts JPEG_HFI_INIT = {
"Type Specific",
"jpeg.main_hdr.ts",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL
};
static header_field_info hfi_rtp_jpeg_main_hdr_offs JPEG_HFI_INIT = {
"Fragment Offset",
"jpeg.main_hdr.offset",
FT_UINT24, BASE_DEC, NULL, 0,
NULL, HFILL
};
static header_field_info hfi_rtp_jpeg_main_hdr_type JPEG_HFI_INIT = {
"Type",
"jpeg.main_hdr.type",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL
};
static header_field_info hfi_rtp_jpeg_main_hdr_q JPEG_HFI_INIT = {
"Q",
"jpeg.main_hdr.q",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL
};
static header_field_info hfi_rtp_jpeg_main_hdr_width JPEG_HFI_INIT = {
"Width",
"jpeg.main_hdr.width",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL
};
static header_field_info hfi_rtp_jpeg_main_hdr_height JPEG_HFI_INIT = {
"Height",
"jpeg.main_hdr.height",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL
};
static header_field_info hfi_rtp_jpeg_restart_hdr JPEG_HFI_INIT = {
"Restart Marker Header",
"jpeg.restart_hdr",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL
};
static header_field_info hfi_rtp_jpeg_restart_hdr_interval JPEG_HFI_INIT = {
"Restart Interval",
"jpeg.restart_hdr.interval",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL
};
static header_field_info hfi_rtp_jpeg_restart_hdr_f JPEG_HFI_INIT = {
"F",
"jpeg.restart_hdr.f",
FT_UINT16, BASE_DEC, NULL, 0x8000,
NULL, HFILL
};
static header_field_info hfi_rtp_jpeg_restart_hdr_l JPEG_HFI_INIT = {
"L",
"jpeg.restart_hdr.l",
FT_UINT16, BASE_DEC, NULL, 0x4000,
NULL, HFILL
};
static header_field_info hfi_rtp_jpeg_restart_hdr_count JPEG_HFI_INIT = {
"Restart Count",
"jpeg.restart_hdr.count",
FT_UINT16, BASE_DEC, NULL, 0x3FFF,
NULL, HFILL
};
static header_field_info hfi_rtp_jpeg_qtable_hdr JPEG_HFI_INIT = {
"Quantization Table Header",
"jpeg.qtable_hdr",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL
};
static header_field_info hfi_rtp_jpeg_qtable_hdr_mbz JPEG_HFI_INIT = {
"MBZ",
"jpeg.qtable_hdr.mbz",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL
};
static header_field_info hfi_rtp_jpeg_qtable_hdr_prec JPEG_HFI_INIT = {
"Precision",
"jpeg.qtable_hdr.precision",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL
};
static header_field_info hfi_rtp_jpeg_qtable_hdr_length JPEG_HFI_INIT = {
"Length",
"jpeg.qtable_hdr.length",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL
};
static header_field_info hfi_rtp_jpeg_qtable_hdr_data JPEG_HFI_INIT = {
"Quantization Table Data",
"jpeg.qtable_hdr.data",
FT_BYTES, BASE_NONE, NULL, 0,
NULL, HFILL
};
static header_field_info hfi_rtp_jpeg_payload JPEG_HFI_INIT = {
"Payload",
"jpeg.payload",
FT_BYTES, BASE_NONE, NULL, 0,
NULL, HFILL
};
/* JPEG fields defining a sub tree */
static gint ett_jpeg = -1;
static int
dissect_jpeg( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_ )
{
proto_item *ti = NULL;
proto_tree *jpeg_tree = NULL;
proto_tree *main_hdr_tree = NULL;
proto_tree *restart_hdr_tree = NULL;
proto_tree *qtable_hdr_tree = NULL;
guint32 fragment_offset = 0;
guint16 len = 0;
guint8 type = 0;
guint8 q = 0;
gint h = 0;
gint w = 0;
unsigned int offset = 0;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "JPEG");
col_set_str(pinfo->cinfo, COL_INFO, "JPEG message");
if ( tree ) {
ti = proto_tree_add_item( tree, hfi_jpeg, tvb, offset, -1, ENC_NA );
jpeg_tree = proto_item_add_subtree( ti, ett_jpeg );
ti = proto_tree_add_item(jpeg_tree, &hfi_rtp_jpeg_main_hdr, tvb, offset, 8, ENC_NA);
main_hdr_tree = proto_item_add_subtree(ti, ett_jpeg);
proto_tree_add_item(main_hdr_tree, &hfi_rtp_jpeg_main_hdr_ts, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(main_hdr_tree, &hfi_rtp_jpeg_main_hdr_offs, tvb, offset, 3, ENC_BIG_ENDIAN);
fragment_offset = tvb_get_ntoh24(tvb, offset);
offset += 3;
proto_tree_add_item(main_hdr_tree, &hfi_rtp_jpeg_main_hdr_type, tvb, offset, 1, ENC_BIG_ENDIAN);
type = tvb_get_guint8(tvb, offset);
offset += 1;
proto_tree_add_item(main_hdr_tree, &hfi_rtp_jpeg_main_hdr_q, tvb, offset, 1, ENC_BIG_ENDIAN);
q = tvb_get_guint8(tvb, offset);
offset += 1;
w = tvb_get_guint8(tvb, offset) * 8;
proto_tree_add_uint(main_hdr_tree, &hfi_rtp_jpeg_main_hdr_width, tvb, offset, 1, w);
offset += 1;
h = tvb_get_guint8(tvb, offset) * 8;
proto_tree_add_uint(main_hdr_tree, &hfi_rtp_jpeg_main_hdr_height, tvb, offset, 1, h);
offset += 1;
if (type >= 64 && type <= 127) {
ti = proto_tree_add_item(jpeg_tree, &hfi_rtp_jpeg_restart_hdr, tvb, offset, 4, ENC_NA);
restart_hdr_tree = proto_item_add_subtree(ti, ett_jpeg);
proto_tree_add_item(restart_hdr_tree, &hfi_rtp_jpeg_restart_hdr_interval, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(restart_hdr_tree, &hfi_rtp_jpeg_restart_hdr_f, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(restart_hdr_tree, &hfi_rtp_jpeg_restart_hdr_l, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(restart_hdr_tree, &hfi_rtp_jpeg_restart_hdr_count, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
}
if (q >= 128 && fragment_offset == 0) {
ti = proto_tree_add_item(jpeg_tree, &hfi_rtp_jpeg_qtable_hdr, tvb, offset, -1, ENC_NA);
qtable_hdr_tree = proto_item_add_subtree(ti, ett_jpeg);
proto_tree_add_item(qtable_hdr_tree, &hfi_rtp_jpeg_qtable_hdr_mbz, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(qtable_hdr_tree, &hfi_rtp_jpeg_qtable_hdr_prec, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(qtable_hdr_tree, &hfi_rtp_jpeg_qtable_hdr_length, tvb, offset, 2, ENC_BIG_ENDIAN);
len = tvb_get_ntohs(tvb, offset);
offset += 2;
if (len > 0) {
proto_tree_add_item(qtable_hdr_tree, &hfi_rtp_jpeg_qtable_hdr_data, tvb, offset, len, ENC_NA);
offset += len;
}
proto_item_set_len(ti, len + 4);
}
/* The rest of the packet is the JPEG data */
proto_tree_add_item( jpeg_tree, &hfi_rtp_jpeg_payload, tvb, offset, -1, ENC_NA );
}
return tvb_captured_length(tvb);
}
void
proto_register_jpeg(void)
{
#ifndef HAVE_HFI_SECTION_INIT
static header_field_info *hfi[] =
{
&hfi_rtp_jpeg_main_hdr,
&hfi_rtp_jpeg_main_hdr_ts,
&hfi_rtp_jpeg_main_hdr_offs,
&hfi_rtp_jpeg_main_hdr_type,
&hfi_rtp_jpeg_main_hdr_q,
&hfi_rtp_jpeg_main_hdr_width,
&hfi_rtp_jpeg_main_hdr_height,
&hfi_rtp_jpeg_restart_hdr,
&hfi_rtp_jpeg_restart_hdr_interval,
&hfi_rtp_jpeg_restart_hdr_f,
&hfi_rtp_jpeg_restart_hdr_l,
&hfi_rtp_jpeg_restart_hdr_count,
&hfi_rtp_jpeg_qtable_hdr,
&hfi_rtp_jpeg_qtable_hdr_mbz,
&hfi_rtp_jpeg_qtable_hdr_prec,
&hfi_rtp_jpeg_qtable_hdr_length,
&hfi_rtp_jpeg_qtable_hdr_data,
&hfi_rtp_jpeg_payload,
};
#endif
static gint *ett[] =
{
&ett_jpeg,
};
int proto_jpeg;
proto_jpeg = proto_register_protocol("RFC 2435 JPEG","JPEG","jpeg");
hfi_jpeg = proto_registrar_get_nth(proto_jpeg);
proto_register_fields(proto_jpeg, hfi, array_length(hfi));
proto_register_subtree_array(ett, array_length(ett));
jpeg_handle = create_dissector_handle(dissect_jpeg, proto_jpeg);
/* RFC 2798 */
register_ber_oid_dissector_handle("0.9.2342.19200300.100.1.60", jpeg_handle, proto_jpeg, "jpegPhoto");
}
void
proto_reg_handoff_jpeg(void)
{
dissector_add_uint("rtp.pt", PT_JPEG, jpeg_handle);
}
/*
* Editor modelines - http://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:
*/
|
