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
|
/* packet-nat-pmp.c
* Routines for NAT Port Mapping Protocol packet disassembly.
* draft-cheshire-nat-pmp-03
* http://files.dns-sd.org/draft-cheshire-nat-pmp.txt
*
* Copyright 2009, Stig Bjorlykke <stig@bjorlykke.org>
*
* $Id$
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <epan/packet.h>
#include <epan/expert.h>
#define PNAME "NAT Port Mapping Protocol"
#define PSNAME "NAT-PMP"
#define PFNAME "nat-pmp"
#define NAT_PMP_STATUS_PORT 5350
#define NAT_PMP_PORT 5351
/* opcodes */
#define EXTERNAL_ADDRESS_REQUEST 0
#define MAP_UDP_REQUEST 1
#define MAP_TCP_REQUEST 2
#define EXTERNAL_ADDRESS_RESPONSE 128
#define MAP_UDP_RESPONSE 129
#define MAP_TCP_RESPONSE 130
static int proto_nat_pmp = -1;
static int hf_version = -1;
static int hf_opcode = -1;
static int hf_result_code = -1;
static int hf_sssoe = -1;
static int hf_external_ip = -1;
static int hf_reserved = -1;
static int hf_internal_port = -1;
static int hf_external_port_requested = -1;
static int hf_external_port_mapped = -1;
static int hf_rpmlis = -1;
static int hf_pmlis = -1;
static gint ett_nat_pmp = -1;
static const value_string opcode_vals[] = {
{ EXTERNAL_ADDRESS_REQUEST, "External Address Request" },
{ EXTERNAL_ADDRESS_RESPONSE, "External Address Response" },
{ MAP_UDP_REQUEST, "Map UDP Request" },
{ MAP_UDP_RESPONSE, "Map UDP Response" },
{ MAP_TCP_REQUEST, "Map TCP Request" },
{ MAP_TCP_RESPONSE, "Map TCP Response" },
{ 0, NULL }
};
static const value_string result_vals[] = {
{ 0, "Success" },
{ 1, "Unsupported Version" },
{ 2, "Not Authorized/Refused" },
{ 3, "Network Failure" },
{ 4, "Out of resources" },
{ 5, "Unsupported opcode" },
{ 0, NULL }
};
static void dissect_nat_pmp (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *nat_pmp_tree;
proto_item *ti, *op_ti;
gint offset = 0;
guint8 opcode;
col_set_str (pinfo->cinfo, COL_PROTOCOL, PSNAME);
col_clear (pinfo->cinfo, COL_INFO);
ti = proto_tree_add_item (tree, proto_nat_pmp, tvb, offset, -1, FALSE);
nat_pmp_tree = proto_item_add_subtree (ti, ett_nat_pmp);
proto_tree_add_item (nat_pmp_tree, hf_version, tvb, offset, 1, FALSE);
offset++;
opcode = tvb_get_guint8 (tvb, offset);
proto_item_append_text (ti, ", %s", val_to_str (opcode, opcode_vals, "Unknown opcode: %d"));
op_ti = proto_tree_add_item (nat_pmp_tree, hf_opcode, tvb, offset, 1, FALSE);
offset++;
col_add_str (pinfo->cinfo, COL_INFO, val_to_str (opcode, opcode_vals, "Unknown opcode: %d"));
switch (opcode) {
case EXTERNAL_ADDRESS_REQUEST:
/* No more data */
break;
case EXTERNAL_ADDRESS_RESPONSE:
proto_tree_add_item (nat_pmp_tree, hf_result_code, tvb, offset, 2, FALSE);
offset += 2;
proto_tree_add_item (nat_pmp_tree, hf_sssoe, tvb, offset, 4, FALSE);
offset += 4;
proto_tree_add_item (nat_pmp_tree, hf_external_ip, tvb, offset, 4, FALSE);
offset += 4;
break;
case MAP_UDP_REQUEST:
case MAP_TCP_REQUEST:
proto_tree_add_item (nat_pmp_tree, hf_reserved, tvb, offset, 2, FALSE);
offset += 2;
proto_tree_add_item (nat_pmp_tree, hf_internal_port, tvb, offset, 2, FALSE);
offset += 2;
proto_tree_add_item (nat_pmp_tree, hf_external_port_requested, tvb, offset, 2, FALSE);
offset += 2;
proto_tree_add_item (nat_pmp_tree, hf_rpmlis, tvb, offset, 4, FALSE);
offset += 4;
break;
case MAP_UDP_RESPONSE:
case MAP_TCP_RESPONSE:
proto_tree_add_item (nat_pmp_tree, hf_result_code, tvb, offset, 2, FALSE);
offset += 2;
proto_tree_add_item (nat_pmp_tree, hf_sssoe, tvb, offset, 4, FALSE);
offset += 4;
proto_tree_add_item (nat_pmp_tree, hf_internal_port, tvb, offset, 2, FALSE);
offset += 2;
proto_tree_add_item (nat_pmp_tree, hf_external_port_mapped, tvb, offset, 2, FALSE);
offset += 2;
proto_tree_add_item (nat_pmp_tree, hf_pmlis, tvb, offset, 4, FALSE);
offset += 4;
break;
default:
/* Unknown OP */
expert_add_info_format (pinfo, op_ti, PI_RESPONSE_CODE, PI_WARN, "Unknown opcode: %d", opcode);
break;
}
}
void proto_register_nat_pmp (void)
{
static hf_register_info hf[] = {
{ &hf_version,
{ "Version", "nat-pmp.version", FT_UINT8, BASE_DEC,
NULL, 0x0, NULL, HFILL } },
{ &hf_opcode,
{ "Opcode", "nat-pmp.opcode", FT_UINT8, BASE_DEC,
VALS(opcode_vals), 0x0, NULL, HFILL } },
{ &hf_result_code,
{ "Result Code", "nat-pmp.result_code", FT_UINT16, BASE_DEC,
VALS(result_vals), 0x0, NULL, HFILL } },
{ &hf_sssoe,
{ "Seconds Since Start of Epoch", "nat-pmp.sssoe", FT_UINT32, BASE_DEC,
NULL, 0x0, NULL, HFILL } },
{ &hf_external_ip,
{ "External IP Address", "nat-pmp.external_ip", FT_IPv4, BASE_NONE,
NULL, 0x0, NULL, HFILL } },
{ &hf_reserved,
{ "Reserved", "nat-pmp.reserved", FT_UINT16, BASE_DEC,
NULL, 0x0, "Reserved (must be zero)", HFILL } },
{ &hf_internal_port,
{ "Internal Port", "nat-pmp.internal_port", FT_UINT16, BASE_DEC,
NULL, 0x0, NULL, HFILL } },
{ &hf_external_port_requested,
{ "Requested External Port", "nat-pmp.external_port", FT_UINT16, BASE_DEC,
NULL, 0x0, NULL, HFILL } },
{ &hf_external_port_mapped,
{ "Mapped External Port", "nat-pmp.external_port", FT_UINT16, BASE_DEC,
NULL, 0x0, NULL, HFILL } },
{ &hf_rpmlis,
{ "Requested Port Mapping Lifetime", "nat-pmp.pml", FT_UINT32, BASE_DEC,
NULL, 0x0, "Requested Port Mapping Lifetime in Seconds", HFILL } },
{ &hf_pmlis,
{ "Port Mapping Lifetime", "nat-pmp.pml", FT_UINT32, BASE_DEC,
NULL, 0x0, "Port Mapping Lifetime in Seconds", HFILL } },
};
static gint *ett[] = {
&ett_nat_pmp,
};
proto_nat_pmp = proto_register_protocol (PNAME, PSNAME, PFNAME);
register_dissector (PFNAME, dissect_nat_pmp, proto_nat_pmp);
proto_register_field_array (proto_nat_pmp, hf, array_length (hf));
proto_register_subtree_array (ett, array_length (ett));
}
void proto_reg_handoff_nat_pmp (void)
{
dissector_handle_t nat_pmp_handle;
nat_pmp_handle = find_dissector (PFNAME);
dissector_add_uint ("udp.port", NAT_PMP_STATUS_PORT, nat_pmp_handle);
dissector_add_uint ("udp.port", NAT_PMP_PORT, nat_pmp_handle);
}
/*
* Editor modelines
*
* 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:
*/
|
