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/* packet-dmx-text.c
* DMX Text packet disassembly.
*
* $Id$
*
* This dissector is written by
*
* Erwin Rol <erwin@erwinrol.com>
* Copyright 2011 Erwin Rol
*
* Wireshark - Network traffic analyzer
* Gerald Combs <gerald@wireshark.org>
* Copyright 1999 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., 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301, USA.
*/
/*
* This dissector is based on;
* American National Standard E1.11 - 2004
* Entertainment Technology USITT DMX512-A
* Asynchronous Serial Digital Data Transmission Standard
* for Controlling Lighting Equipment and Accessories
*/
#include "config.h"
#include <epan/packet.h>
static int proto_dmx_text = -1;
static int hf_dmx_text_page_nr = -1;
static int hf_dmx_text_line_len = -1;
static int hf_dmx_text_string = -1;
static int ett_dmx_text = -1;
static void
dissect_dmx_text(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
col_set_str(pinfo->cinfo, COL_PROTOCOL, "DMX Text");
col_clear(pinfo->cinfo, COL_INFO);
if (tree != NULL) {
guint offset = 0;
guint size;
proto_tree *ti = proto_tree_add_item(tree, proto_dmx_text, tvb,
offset, -1, FALSE);
proto_tree *dmx_text_tree = proto_item_add_subtree(ti, ett_dmx_text);
proto_tree_add_item(dmx_text_tree, hf_dmx_text_page_nr, tvb,
offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(dmx_text_tree, hf_dmx_text_line_len, tvb,
offset, 1, ENC_BIG_ENDIAN);
offset++;
size = tvb_reported_length_remaining(tvb, offset);
proto_tree_add_item(dmx_text_tree, hf_dmx_text_string, tvb,
offset, size, ENC_BIG_ENDIAN);
}
}
void
proto_register_dmx_text(void)
{
static hf_register_info hf[] = {
{ &hf_dmx_text_page_nr,
{ "Page Number",
"dmx_text.page_nr",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_dmx_text_line_len,
{ "Line Length",
"dmx_text.line_length",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_dmx_text_string,
{ "Text String",
"dmx_text.string",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
};
static gint *ett[] = {
&ett_dmx_text
};
proto_dmx_text = proto_register_protocol("DMX Text Frame", "DMX Text Frame", "dmx-text");
proto_register_field_array(proto_dmx_text, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
register_dissector("dmx-text", dissect_dmx_text, proto_dmx_text);
}
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