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
|
/* packet-irc.c
* Routines for IRC packet dissection
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* Copied from packet-tftp.c
*
* 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>
static int proto_irc = -1;
static int hf_irc_request = -1;
static int hf_irc_response = -1;
static gint ett_irc = -1;
#define TCP_PORT_IRC 6667
/* good candidate for dynamic port specification */
static void
dissect_irc_request(proto_tree *tree, tvbuff_t *tvb, int offset, int linelen)
{
proto_tree_add_item(tree, hf_irc_request, tvb, offset, linelen, TRUE);
}
static void
dissect_irc_response(proto_tree *tree, tvbuff_t *tvb, int offset, int linelen)
{
proto_tree_add_item(tree, hf_irc_response, tvb, offset, linelen, TRUE);
}
static void
dissect_irc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *irc_tree, *ti;
gint offset = 0;
gint next_offset;
int linelen;
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "IRC");
if (check_col(pinfo->cinfo, COL_INFO))
{
col_set_str(pinfo->cinfo, COL_INFO,
(pinfo->match_port == pinfo->destport) ? "Request" : "Response");
}
if (tree)
{
ti = proto_tree_add_item(tree, proto_irc, tvb, 0, -1, FALSE);
irc_tree = proto_item_add_subtree(ti, ett_irc);
/*
* Process the packet data, a line at a time.
*/
while (tvb_reported_length_remaining(tvb, offset) > 0)
{
/*
* Find the end of the line.
*/
linelen = tvb_find_line_end(tvb, offset, -1, &next_offset, FALSE);
if (next_offset == offset) {
/*
* XXX - we really want the "show data a
* line at a time" loops in various
* dissectors to do reassembly and to
* throw an exception if there's no
* line ending in the current packet
* and we're not doing reassembly.
*/
break;
}
if (linelen != 0)
{
if (pinfo->match_port == pinfo->destport)
{
dissect_irc_request(irc_tree, tvb, offset, linelen);
}
else
{
dissect_irc_response(irc_tree, tvb, offset, linelen);
}
}
offset = next_offset;
}
}
}
void
proto_register_irc(void)
{
static hf_register_info hf[] = {
{ &hf_irc_response,
{ "Response", "irc.response",
FT_STRING, BASE_NONE, NULL, 0x0,
"Line of response message", HFILL }},
{ &hf_irc_request,
{ "Request", "irc.request",
FT_STRING, BASE_NONE, NULL, 0x0,
"Line of request message", HFILL }},
};
static gint *ett[] = {
&ett_irc,
};
proto_irc = proto_register_protocol("Internet Relay Chat", "IRC", "irc");
proto_register_field_array(proto_irc, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_irc(void)
{
dissector_handle_t irc_handle;
irc_handle = create_dissector_handle(dissect_irc, proto_irc);
dissector_add("tcp.port", TCP_PORT_IRC, irc_handle);
}
|
