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
|
/* packet-dns.c
* Routines for TSDNS (TeamSpeak3 DNS) packet disassembly
* Copyright 2018, Maciej Krueger <mkg20001@gmail.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/expert.h>
#include <wsutil/strtoi.h>
#define TSDNS_PORT 41144 /* Not IANA registered */
void proto_register_tsdns(void);
void proto_reg_handoff_tsdns(void);
static int proto_tsdns = -1;
static int hf_tsdns_data = -1;
static int hf_tsdns_request = -1;
static int hf_tsdns_request_domain = -1;
static int hf_tsdns_response = -1;
static int hf_tsdns_response_ip = -1;
static int hf_tsdns_response_address = -1;
static int hf_tsdns_response_port = -1;
static expert_field ei_response_port_malformed = EI_INIT;
static gint ett_tsdns = -1;
static int dissect_tsdns(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
int offset = 0;
gboolean request = FALSE;
if (pinfo->destport == pinfo->match_uint) {
request = TRUE;
}
col_set_str(pinfo->cinfo, COL_PROTOCOL, "TSDNS");
int pLen = tvb_reported_length(tvb);
if (request) {
col_set_str(pinfo->cinfo, COL_INFO, "Request");
col_append_fstr(pinfo->cinfo, COL_INFO, " %.*s", pLen - 5, tvb_get_string_enc(wmem_packet_scope(), tvb, 0, pLen - 5, ENC_ASCII|ENC_NA));
} else {
col_set_str(pinfo->cinfo, COL_INFO, "Response");
col_append_fstr(pinfo->cinfo, COL_INFO, " %.*s", pLen, tvb_get_string_enc(wmem_packet_scope(), tvb, 0, pLen, ENC_ASCII|ENC_NA));
}
proto_tree *tsdns_tree;
proto_item *ti, *hidden_item, *address_item;
ti = proto_tree_add_item(tree, proto_tsdns, tvb, offset, -1, ENC_NA);
tsdns_tree = proto_item_add_subtree(ti, ett_tsdns);
hidden_item = proto_tree_add_item(tsdns_tree, hf_tsdns_data, tvb, offset, -1, ENC_ASCII|ENC_NA);
PROTO_ITEM_SET_HIDDEN(hidden_item);
if (request) { // request is DOMAIN\n\r\r\r\n
hidden_item = proto_tree_add_boolean(tsdns_tree, hf_tsdns_request, tvb, 0, 0, 1); // using pLen - 5 as the last chars are \n\r\r\r\n which are just indicating the end of the request
proto_tree_add_item(tsdns_tree, hf_tsdns_request_domain, tvb, offset, pLen - 5, ENC_ASCII|ENC_NA);
} else { // response is IP:PORT
hidden_item = proto_tree_add_boolean(tsdns_tree, hf_tsdns_response, tvb, 0, 0, 1);
address_item = proto_tree_add_item(tsdns_tree, hf_tsdns_response_address, tvb, offset, pLen, ENC_ASCII|ENC_NA);
gchar** splitAddress;
splitAddress = wmem_strsplit(wmem_packet_scope(), tvb_format_text(tvb, 0, pLen), ":", 1); // unsure if TSDNS also does IPv6...
if (splitAddress[1] == NULL) {
expert_add_info(pinfo, address_item, &ei_response_port_malformed);
} else {
proto_tree_add_string(tsdns_tree, hf_tsdns_response_ip, tvb, 0, pLen, splitAddress[0]);
guint32 port;
if (ws_strtou32(splitAddress[1], NULL, &port))
proto_tree_add_uint(tsdns_tree, hf_tsdns_response_port, tvb, 0, pLen, port);
}
}
PROTO_ITEM_SET_HIDDEN(hidden_item);
return tvb_captured_length(tvb);
} /* dissect_tsdns */
void proto_register_tsdns(void)
{
static hf_register_info hf[] = {
{ &hf_tsdns_data,
{ "Data", "tsdns.data",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tsdns_request,
{ "Request", "tsdns.request",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"TRUE if TSDNS Request", HFILL }},
{ &hf_tsdns_request_domain,
{ "Requested Domain", "tsdns.request.domain",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tsdns_response,
{ "Response","tsdns.response",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"TRUE if TSDNS Response", HFILL }},
{ &hf_tsdns_response_address,
{ "Response Address","tsdns.response.address",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tsdns_response_ip,
{ "Response IP","tsdns.response.ip",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tsdns_response_port,
{ "Response Port","tsdns.response.port",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }}
};
static ei_register_info ei[] = {
{ &ei_response_port_malformed, { "tsdns.response.port.malformed", PI_MALFORMED, PI_ERROR, "Address port is not an integer or not contained in address", EXPFILL }}
};
expert_module_t* expert_tsdns;
static gint *ett[] = {
&ett_tsdns
};
proto_tsdns = proto_register_protocol("TeamSpeak3 DNS", "TSDNS", "tsdns");
proto_register_field_array(proto_tsdns, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_tsdns = expert_register_protocol(proto_tsdns);
expert_register_field_array(expert_tsdns, ei, array_length(ei));
}
void proto_reg_handoff_tsdns(void)
{
dissector_handle_t tsdns_handle;
tsdns_handle = create_dissector_handle(dissect_tsdns, proto_tsdns);
dissector_add_uint_with_preference("tcp.port", TSDNS_PORT, tsdns_handle);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
|
