Include files from the "epan" directory and subdirectories thereof with
[obnox/wireshark/wip.git] / packet-irc.c
1 /* packet-irc.c
2  * Routines for IRC packet dissection
3  *
4  * $Id: packet-irc.c,v 1.17 2002/01/21 07:36:35 guy Exp $
5  *
6  * Ethereal - Network traffic analyzer
7  * By Gerald Combs <gerald@ethereal.com>
8  * Copyright 1998 Gerald Combs
9  *
10  * Copied from packet-tftp.c
11  * 
12  * This program is free software; you can redistribute it and/or
13  * modify it under the terms of the GNU General Public License
14  * as published by the Free Software Foundation; either version 2
15  * of the License, or (at your option) any later version.
16  * 
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20  * GNU General Public License for more details.
21  * 
22  * You should have received a copy of the GNU General Public License
23  * along with this program; if not, write to the Free Software
24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
25  */
26
27 #ifdef HAVE_CONFIG_H
28 # include "config.h"
29 #endif
30
31 #include <stdio.h>
32
33 #ifdef HAVE_SYS_TYPES_H
34 # include <sys/types.h>
35 #endif
36
37 #ifdef HAVE_NETINET_IN_H
38 # include <netinet/in.h>
39 #endif
40
41 #include <string.h>
42 #include <glib.h>
43 #include <epan/packet.h>
44
45 static int proto_irc = -1;
46 static int hf_irc_request = -1;
47 static int hf_irc_response = -1;
48 static int hf_irc_command = -1;
49
50 static gint ett_irc = -1;
51
52 #define TCP_PORT_IRC                    6667
53         /* good candidate for dynamic port specification */
54
55 static void
56 dissect_irc_request(proto_tree *tree, tvbuff_t *tvb, int offset, int len,
57     const char *line, int linelen)
58 {
59         proto_tree_add_boolean_hidden(tree, hf_irc_request, tvb, offset, len,
60             TRUE);
61         proto_tree_add_text(tree, tvb, offset, len, "Request Line: %.*s",
62             linelen, line);
63 }
64
65 static void
66 dissect_irc_response(proto_tree *tree, tvbuff_t *tvb, int offset, int len,
67     const char *line, int linelen)
68 {
69         proto_tree_add_boolean_hidden(tree, hf_irc_response, tvb, offset, len,
70             TRUE);
71         proto_tree_add_text(tree, tvb, offset, len, "Response Line: %.*s",
72             linelen, line);
73 }
74
75 static void
76 dissect_irc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
77 {
78         proto_tree      *irc_tree, *ti;
79         gint            offset = 0;
80         const u_char    *line;
81         gint            next_offset;
82         int             linelen;
83
84         if (check_col(pinfo->cinfo, COL_PROTOCOL))
85                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "IRC");
86
87         if (check_col(pinfo->cinfo, COL_INFO))
88         {
89                 col_set_str(pinfo->cinfo, COL_INFO,
90                     (pinfo->match_port == pinfo->destport) ? "Request" : "Response");
91         }
92
93         if (tree)
94         {
95                 ti = proto_tree_add_item(tree, proto_irc, tvb, 0,
96                     tvb_length(tvb), FALSE);
97                 irc_tree = proto_item_add_subtree(ti, ett_irc);
98
99                 /*
100                  * Process the packet data, a line at a time.
101                  */
102                 while (tvb_offset_exists(tvb, offset))
103                 {
104                         /*
105                          * Find the end of the line.
106                          */
107                         linelen = tvb_find_line_end(tvb, offset, -1,
108                             &next_offset);
109
110                         /*
111                          * Get a buffer that refers to the line (without
112                          * the line terminator).
113                          */
114                         line = tvb_get_ptr(tvb, offset, linelen);
115
116                         if (linelen != 0)
117                         {
118                                 if (pinfo->match_port == pinfo->destport)
119                                 {
120                                         dissect_irc_request(irc_tree, tvb,
121                                             offset, next_offset - offset,
122                                             line, linelen);
123                                 }
124                                 else
125                                 {
126                                         dissect_irc_response(irc_tree, tvb,
127                                             offset, next_offset - offset,
128                                             line, linelen);
129                                 }
130                         }
131                         offset = next_offset;
132                 }
133         }
134 }
135
136 void
137 proto_register_irc(void)
138 {
139         static hf_register_info hf[] = {
140           { &hf_irc_response,
141             { "Response",           "irc.response",
142               FT_BOOLEAN, BASE_NONE, NULL, 0x0,
143               "TRUE if IRC response", HFILL }},
144           
145           { &hf_irc_request,
146             { "Request",            "irc.request",
147               FT_BOOLEAN, BASE_NONE, NULL, 0x0,
148               "TRUE if IRC request", HFILL }},
149
150           { &hf_irc_command,
151             { "Command",            "irc.command",
152               FT_STRING, BASE_NONE, NULL, 0x0,
153               "Command associated with request", HFILL }}
154         };
155
156         static gint *ett[] = {
157                 &ett_irc,
158         };
159         proto_irc = proto_register_protocol("Internet Relay Chat", "IRC", "irc");
160         proto_register_field_array(proto_irc, hf, array_length(hf));
161         proto_register_subtree_array(ett, array_length(ett));
162 }
163
164 void
165 proto_reg_handoff_irc(void)
166 {
167         dissector_handle_t irc_handle;
168
169         irc_handle = create_dissector_handle(dissect_irc, proto_irc);
170         dissector_add("tcp.port", TCP_PORT_IRC, irc_handle);
171 }