![Bill Meier](/assets/img/avatar_default.png)
- Remove unneeded #includes; - Simplify code slightly; - Remove unused ett variable and related; - Remove empty proto_reg_handoff...() functions; - Fix a few cases of "set but unused". - Do some whitespace changes. svn path=/trunk/; revision=43748
140 lines
3.5 KiB
C
140 lines
3.5 KiB
C
/* packet-dmx.c
|
|
* DMX packet disassembly.
|
|
*
|
|
* $Id$
|
|
*
|
|
* This dissector is written by
|
|
*
|
|
* Erwin Rol <erwin@erwinrol.com>
|
|
* Copyright 2012 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
|
|
*/
|
|
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <epan/packet.h>
|
|
|
|
#define DMX_SC_DMX 0x00
|
|
#define DMX_SC_TEXT 0x17
|
|
#define DMX_SC_TEST 0x55
|
|
#define DMX_SC_RDM 0xCC
|
|
#define DMX_SC_SIP 0xCF
|
|
|
|
static const value_string dmx_sc_vals[] = {
|
|
{ DMX_SC_DMX, "DMX" },
|
|
{ DMX_SC_TEXT, "Text" },
|
|
{ DMX_SC_TEST, "Test" },
|
|
{ DMX_SC_RDM, "RDM" },
|
|
{ DMX_SC_SIP, "SIP" },
|
|
{ 0, NULL },
|
|
};
|
|
|
|
void proto_reg_handoff_dmx(void);
|
|
|
|
static int proto_dmx = -1;
|
|
|
|
static int hf_dmx_start_code = -1;
|
|
|
|
static dissector_handle_t rdm_handle;
|
|
static dissector_handle_t dmx_chan_handle;
|
|
static dissector_handle_t dmx_test_handle;
|
|
static dissector_handle_t dmx_text_handle;
|
|
static dissector_handle_t dmx_sip_handle;
|
|
static dissector_handle_t data_handle;
|
|
|
|
|
|
static void
|
|
dissect_dmx(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
tvbuff_t *next_tvb;
|
|
unsigned offset = 0;
|
|
guint8 start_code;
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "DMX");
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
start_code = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_dmx_start_code, tvb,
|
|
offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
next_tvb = tvb_new_subset_remaining(tvb, offset);
|
|
|
|
switch (start_code) {
|
|
case DMX_SC_DMX:
|
|
call_dissector(dmx_chan_handle, next_tvb, pinfo, tree);
|
|
break;
|
|
case DMX_SC_TEXT:
|
|
call_dissector(dmx_text_handle, next_tvb, pinfo, tree);
|
|
break;
|
|
case DMX_SC_TEST:
|
|
call_dissector(dmx_test_handle, next_tvb, pinfo, tree);
|
|
break;
|
|
case DMX_SC_RDM:
|
|
call_dissector(rdm_handle, next_tvb, pinfo, tree);
|
|
break;
|
|
case DMX_SC_SIP:
|
|
call_dissector(dmx_sip_handle, next_tvb, pinfo, tree);
|
|
break;
|
|
default:
|
|
if (offset < tvb_length(tvb))
|
|
call_dissector(data_handle, next_tvb, pinfo, tree);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
proto_register_dmx(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_dmx_start_code,
|
|
{ "Start Code", "dmx.start_code",
|
|
FT_UINT8, BASE_HEX, VALS(dmx_sc_vals), 0x0,
|
|
NULL, HFILL }},
|
|
};
|
|
|
|
proto_dmx = proto_register_protocol("DMX", "DMX", "dmx");
|
|
proto_register_field_array(proto_dmx, hf, array_length(hf));
|
|
register_dissector("dmx", dissect_dmx, proto_dmx);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_dmx(void)
|
|
{
|
|
rdm_handle = find_dissector("rdm");
|
|
dmx_chan_handle = find_dissector("dmx-chan");
|
|
dmx_test_handle = find_dissector("dmx-test");
|
|
dmx_text_handle = find_dissector("dmx-text");
|
|
dmx_sip_handle = find_dissector("dmx-sip");
|
|
data_handle = find_dissector("data");
|
|
}
|