Don't guard col_set_str (COL_PROTOCOL) with col_check
[obnox/wireshark/wip.git] / epan / dissectors / packet-ax4000.c
1 /* packet-ax4000.c
2  * Routines for Spirent AX/4000 Test Block dissection
3  * Copyright 2004, SEKINE Hideki <sekineh@gf7.so-net.ne.jp>
4  *
5  * $Id$
6  *
7  * Wireshark - Network traffic analyzer
8  * By Gerald Combs <gerald@wireshark.org>
9  * Copyright 1998 Gerald Combs
10  *
11  * This program is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU General Public License
13  * as published by the Free Software Foundation; either version 2
14  * of the License, or (at your option) any later version.
15  * 
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19  * GNU General Public License for more details.
20  * 
21  * You should have received a copy of the GNU General Public License
22  * along with this program; if not, write to the Free Software
23  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24  */
25
26 #ifdef HAVE_CONFIG_H
27 # include "config.h"
28 #endif
29
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33
34 #include <glib.h>
35
36 #include <epan/packet.h>
37 #include <ipproto.h>
38
39 /* Initialize the protocol and registered fields */
40 static int proto_ax4000 = -1;
41 static int hf_ax4000_port = -1;
42 static int hf_ax4000_chassis = -1;
43 static int hf_ax4000_fill = -1;
44 static int hf_ax4000_index = -1;
45 static int hf_ax4000_timestamp = -1;
46 static int hf_ax4000_seq = -1;
47 static int hf_ax4000_crc = -1;
48
49 /* Initialize the subtree pointers */
50 static gint ett_ax4000 = -1;
51
52 /* Code to actually dissect the packets */
53 static void
54 dissect_ax4000(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
55 {
56         proto_item *ti;
57         proto_tree *ax4000_tree;
58         
59         guint8 ax_port;
60         guint8 ax_chassis;
61         guint16 ax_index;
62         guint32 ax_seq;
63         guint32 ax_timestamp;
64
65         /* Make entries in Protocol column and Info column on summary display */
66         col_set_str(pinfo->cinfo, COL_PROTOCOL, "AX4000");
67     
68         ax_port = tvb_get_guint8(tvb, 0);
69         ax_chassis = tvb_get_guint8(tvb, 1);
70         ax_index = tvb_get_ntohs(tvb, 2) & 0x0FFF;
71         ax_timestamp = tvb_get_letohl(tvb, 6);
72         ax_seq = tvb_get_letohl(tvb, 10);
73         
74         if (check_col(pinfo->cinfo, COL_INFO)) {
75                 col_set_str(pinfo->cinfo, COL_INFO, "");
76                 col_append_fstr(pinfo->cinfo, COL_INFO,
77                         "Chss:%u Prt:%u Idx:%u Seq:0x%08x TS:%.6f[msec]",
78                         ax_chassis, ax_port, ax_index, ax_seq, ax_timestamp*1e-5);
79         }
80         
81         if (tree) {
82                 /* create display subtree for the protocol */
83                 ti = proto_tree_add_item(tree, proto_ax4000, tvb, 0, -1, FALSE);
84
85                 ax4000_tree = proto_item_add_subtree(ti, ett_ax4000);
86
87                 proto_tree_add_uint(ax4000_tree,
88                     hf_ax4000_port, tvb, 0, 1, ax_port);
89                 proto_tree_add_uint(ax4000_tree,
90                     hf_ax4000_chassis, tvb, 1, 1, ax_chassis);
91                 proto_tree_add_item(ax4000_tree,
92                     hf_ax4000_fill, tvb, 2, 1, FALSE);
93                 proto_tree_add_uint(ax4000_tree,
94                     hf_ax4000_index, tvb, 2, 2, ax_index);
95                 proto_tree_add_uint(ax4000_tree,
96                     hf_ax4000_timestamp, tvb, 6, 4, ax_timestamp);
97                 proto_tree_add_uint(ax4000_tree,
98                     hf_ax4000_seq, tvb, 10, 4, ax_seq);
99                 proto_tree_add_uint(ax4000_tree,
100                     hf_ax4000_crc, tvb, 14, 2, tvb_get_letohs(tvb, 14));
101         }
102
103 /* If this protocol has a sub-dissector call it here, see section 1.8 */
104 }
105
106 /* Register the protocol with Wireshark */
107
108 /* this format is require because a script is used to build the C function
109    that calls all the protocol registration.
110 */
111
112 void
113 proto_register_ax4000(void)
114 {                 
115         static hf_register_info hf[] = {
116                 { &hf_ax4000_port,
117                         { "Port Number", "ax4000.port",
118                         FT_UINT8, BASE_DEC, NULL, 0x0,          
119                         NULL, HFILL }
120                 },
121                 { &hf_ax4000_chassis,
122                         { "Chassis Number", "ax4000.chassis",
123                         FT_UINT8, BASE_DEC, NULL, 0x0,          
124                         NULL, HFILL }
125                 },
126                 { &hf_ax4000_fill,
127                         { "Fill Type", "ax4000.fill",
128                         FT_UINT8, BASE_DEC, NULL, 0xc0,          
129                         NULL, HFILL }
130                 },
131                 { &hf_ax4000_index,
132                         { "Index", "ax4000.index",
133                         FT_UINT16, BASE_DEC, NULL, 0x0FFF,          
134                         NULL, HFILL }
135                 },
136                 { &hf_ax4000_timestamp,
137                         { "Timestamp", "ax4000.timestamp",
138                         FT_UINT32, BASE_HEX, NULL, 0x0,          
139                         NULL, HFILL }
140                 },
141                 { &hf_ax4000_seq,
142                         { "Sequence Number", "ax4000.seq",
143                         FT_UINT32, BASE_HEX, NULL, 0x0,          
144                         NULL, HFILL }
145                 },
146                 { &hf_ax4000_crc,
147                         { "CRC (unchecked)", "ax4000.crc",
148                         FT_UINT16, BASE_HEX, NULL, 0x0,          
149                         NULL, HFILL }
150                 }
151         };
152
153         /* Setup protocol subtree array */
154         static gint *ett[] = {
155                 &ett_ax4000
156         };
157
158         /* Register the protocol name and description */
159         proto_ax4000 = proto_register_protocol("AX/4000 Test Block",
160             "AX4000", "ax4000");
161
162         /* Required function calls to register the header fields and subtrees used */
163         proto_register_field_array(proto_ax4000, hf, array_length(hf));
164         proto_register_subtree_array(ett, array_length(ett));
165 }
166
167 #define AX4000_TCP_PORT 3357 /* assigned by IANA */
168 #define AX4000_UDP_PORT 3357 /* assigned by IANA */
169
170 void
171 proto_reg_handoff_ax4000(void)
172 {
173         dissector_handle_t ax4000_handle;
174
175         ax4000_handle = create_dissector_handle(dissect_ax4000,
176             proto_ax4000);
177         dissector_add("ip.proto", IP_PROTO_AX4000, ax4000_handle);
178         dissector_add("tcp.port", AX4000_TCP_PORT, ax4000_handle);
179         dissector_add("udp.port", AX4000_UDP_PORT, ax4000_handle);
180 }