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
|
/* packet-diameter_3gpp.c
* Routines for dissecting 3GPP OctetSting AVP:s
* Copyright 2008, Anders Broman <anders.broman[at]ericsson.com>
*
* $Id$
*
* 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; 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* This dissector registers a dissector table for 3GPP Vendor specific
* AVP:s which will be called from the Diameter dissector to dissect
* the content of AVP:s of the OctetString type(or similar).
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#include <glib.h>
#include <epan/packet.h>
#include <epan/proto.h>
#include <epan/asn1.h>
#include "packet-gsm_map.h"
#include "packet-gsm_a_common.h"
#include "packet-e164.h"
#include "packet-e212.h"
/* Initialize the protocol and registered fields */
static int proto_diameter_3gpp = -1;
static int hf_diameter_3gpp_msisdn = -1;
static int hf_diameter_3gpp_user_data = -1;
static int hf_diameter_3gpp_ipaddr = -1;
static int hf_diameter_3gpp_mbms_required_qos_prio = -1;
static int hf_diameter_3gpp_tmgi = -1;
static int hf_diameter_mbms_service_id = -1;
static int hf_diameter_address_digits = -1;
static gint diameter_3gpp_msisdn_ett = -1;
static gint diameter_3gpp_tmgi_ett = -1;
/* Used for Diameter */
/* dissector handles */
static dissector_handle_t xml_handle;
/* AVP Code: 701 MSISDN */
static int
dissect_diameter_3gpp_msisdn(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_) {
proto_item* item;
proto_tree *sub_tree;
int offset = 0;
const char *digit_str;
item = proto_tree_add_item(tree, hf_diameter_3gpp_msisdn, tvb, offset, 6, FALSE);
sub_tree = proto_item_add_subtree(item,diameter_3gpp_msisdn_ett);
dissect_e164_cc(tvb, sub_tree, offset, TRUE);
digit_str = unpack_digits(tvb, 1);
proto_tree_add_string(sub_tree, hf_diameter_address_digits, tvb, 1, -1, digit_str);
return tvb_length(tvb);
}
/* AVP Code: 702 User-Data */
static int
dissect_diameter_3gpp_user_data(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_) {
guint8 word[6];
int length = tvb_length(tvb);
/* If there is less than 38 characters this is not XML
* <?xml version="1.0" encoding="UTF-8"?>
*/
if(length < 38)
return length;
tvb_get_nstringz0(tvb, 0, sizeof(word),word);
if (g_ascii_strncasecmp(word, "<?xml", 5) == 0){
call_dissector(xml_handle, tvb, pinfo, tree);
}
return length;
}
/* AVP Code: 900 TMGI */
static int
dissect_diameter_3gpp_tmgi(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_) {
proto_item* item;
proto_tree *sub_tree;
int offset = 0;
item = proto_tree_add_item(tree, hf_diameter_3gpp_tmgi, tvb, offset, 6, FALSE);
sub_tree = proto_item_add_subtree(item,diameter_3gpp_tmgi_ett);
/* MBMS Service ID consisting of three octets. MBMS Service ID consists of a 6-digit
* fixed-length hexadecimal number between 000000 and FFFFFF.
* MBMS Service ID uniquely identifies an MBMS bearer service within a PLMN.
*/
proto_tree_add_item(sub_tree, hf_diameter_mbms_service_id, tvb, offset, 3, FALSE);
offset = offset+3;
offset = dissect_e212_mcc_mnc(tvb, pinfo, sub_tree, offset, TRUE);
return offset;
}
/* AVP Code: 918 MBMS-BMSC-SSM-IP-Address */
static int
dissect_diameter_3gpp_ipaddr(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_) {
int offset = 0;
proto_tree_add_item(tree, hf_diameter_3gpp_ipaddr, tvb, offset, 4, FALSE);
offset += 4;
return offset;
}
/* AVP Code: 913 MBMS-Required-QoS */
static int
dissect_diameter_3gpp_mbms_required_qos(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_) {
int offset = 0;
guint length;
/* Octet
* 1 Allocation/Retention Priority as specified in 3GPP TS 23.107.
* This octet encodes each priority level defined in 3GPP TS 23.107
* as the binary value of the priority level. It specifies the relative
* importance of the actual MBMS bearer service compared to other MBMS
* and non-MBMS bearer services for allocation and retention of the
* MBMS bearer service.
* 2-N QoS Profile as specified by the Quality-of-Service information element,
* from octet 3 onwards, in 3GPP TS 24.008
*/
proto_tree_add_item(tree, hf_diameter_3gpp_mbms_required_qos_prio, tvb, offset, 1, FALSE);
offset++;
length = tvb_length(tvb) - 1;
de_sm_qos(tvb, tree, offset, length, NULL, 0);
return offset+length;
}
void
proto_reg_handoff_diameter_3gpp(void)
{
/* AVP Code: 5 3GPP-GPRS Negotiated QoS profile */
/* Registered by packet-gtp.c */
/* AVP Code: 22 3GPP-User-Location-Info
* Registered by packet-gtpv2.c
*/
/* AVP Code: 701 MSISDN */
dissector_add("diameter.3gpp", 701, new_create_dissector_handle(dissect_diameter_3gpp_msisdn, proto_diameter_3gpp));
/* AVP Code: 702 User-Data */
dissector_add("diameter.3gpp", 702, new_create_dissector_handle(dissect_diameter_3gpp_user_data, proto_diameter_3gpp));
/* AVP Code: 900 TMGI */
dissector_add("diameter.3gpp", 900, new_create_dissector_handle(dissect_diameter_3gpp_tmgi, proto_diameter_3gpp));
/* AVP Code: 904 MBMS-Session-Duration */
/* AVP Code: 911 MBMS-Time-To-Data-Transfer */
/* Registered by packet-gtp.c */
/* AVP Code: 913 MBMS-Required-QoS */
dissector_add("diameter.3gpp", 913, new_create_dissector_handle(dissect_diameter_3gpp_mbms_required_qos, proto_diameter_3gpp));
/* AVP Code: 918 MBMS-BMSC-SSM-IP-Address */
dissector_add("diameter.3gpp", 918, new_create_dissector_handle(dissect_diameter_3gpp_ipaddr, proto_diameter_3gpp));
xml_handle = find_dissector("xml");
}
void
proto_register_diameter_3gpp(void)
{
/* Setup list of header fields See Section 1.6.1 for details*/
static hf_register_info hf[] = {
{ &hf_diameter_3gpp_msisdn,
{ "MSISDN", "diameter.3gpp.msisdn",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }
},
{ &hf_diameter_3gpp_user_data,
{ "User data", "diameter.3gpp.user_data",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }
},
{ &hf_diameter_3gpp_ipaddr,
{ "IPv4 Address", "diameter.3gpp.ipaddr",
FT_IPv4, BASE_NONE, NULL, 0x0,
NULL, HFILL }
},
{ &hf_diameter_3gpp_mbms_required_qos_prio,
{ "Allocation/Retention Priority", "diameter.3gpp.mbms_required_qos_prio",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_diameter_3gpp_tmgi,
{ "TMGI", "diameter.3gpp.tmgi",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }
},
{ &hf_diameter_mbms_service_id,
{ "MBMS Service ID", "diameter.3gpp.mbms_service_id",
FT_UINT24, BASE_HEX, NULL, 0x0,
NULL, HFILL }
},
{ &hf_diameter_address_digits,
{ "Address digits", "diameter.3gpp.address_digits",
FT_STRING, BASE_NONE, NULL, 0,
NULL, HFILL }
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&diameter_3gpp_msisdn_ett,
&diameter_3gpp_tmgi_ett,
};
/* Required function calls to register the header fields and subtrees used */
proto_diameter_3gpp = proto_register_protocol("Diameter 3GPP","Diameter3GPP", "diameter3gpp");
proto_register_field_array(proto_diameter_3gpp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
|
