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
|
/* packet-echo.c
* Routines for ECHO packet disassembly (RFC862)
*
* Only useful to mark the packets as ECHO in the summary and in the
* protocol hierarchy statistics (since not so many fields to decode ;-)
*
* Laurent Deniel <laurent.deniel@free.fr>
*
* $Id: packet-echo.c,v 1.1 2003/06/25 13:42:18 deniel Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* 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 <stdio.h>
#include <string.h>
#include <glib.h>
#include <epan/packet.h>
#define ECHO_PORT 7
static int proto_echo = -1;
static int hf_echo_data = -1;
static int hf_echo_request = -1;
static int hf_echo_response = -1;
static gint ett_echo = -1;
static void dissect_echo(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *echo_tree = NULL;
proto_item *ti;
int offset = 0;
gboolean request = FALSE;
const char *data = tvb_get_ptr(tvb, offset, -1);
if (pinfo->destport == ECHO_PORT) {
request = TRUE;
}
if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
col_add_str(pinfo->cinfo, COL_PROTOCOL, "ECHO");
}
if (check_col(pinfo->cinfo, COL_INFO)) {
col_add_fstr(pinfo->cinfo, COL_INFO, "%s",
(request) ? "Request" : "Response");
}
if (tree) {
ti = proto_tree_add_item(tree, proto_echo, tvb, offset, -1, FALSE);
echo_tree = proto_item_add_subtree(ti, ett_echo);
if (request) {
proto_tree_add_boolean_hidden(echo_tree, hf_echo_request, tvb, 0, 0, 1);
} else {
proto_tree_add_boolean_hidden(echo_tree, hf_echo_response, tvb, 0, 0, 1);
}
proto_tree_add_bytes(echo_tree, hf_echo_data, tvb, offset, -1, data);
}
} /* dissect_echo */
void proto_register_echo(void)
{
static hf_register_info hf[] = {
{ &hf_echo_data,
{ "Echo data", "echo.data",
FT_BYTES, BASE_HEX, NULL, 0x0,
"Echo data", HFILL }},
{ &hf_echo_request,
{ "Echo request", "echo.request",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"Echo data", HFILL }},
{ &hf_echo_response,
{ "Echo response","echo.response",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"Echo data", HFILL }}
};
static gint *ett[] = {
&ett_echo
};
proto_echo = proto_register_protocol("Echo", "ECHO", "echo");
proto_register_field_array(proto_echo, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void proto_reg_handoff_echo(void)
{
dissector_handle_t echo_handle = NULL;
echo_handle = create_dissector_handle(dissect_echo, proto_echo);
dissector_add("udp.port", ECHO_PORT, echo_handle);
dissector_add("tcp.port", ECHO_PORT, echo_handle);
}
|
