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/* packet-sercosiii_1v1.c
* Routines for SERCOS III dissection
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glib.h>
#include <epan/packet.h>
#include <epan/etypes.h>
#include "packet-sercosiii.h"
/* Initialize the protocol and registered fields */
static gint proto_siii = -1;
/* Initialize the subtree pointers */
static gint ett_siii = -1;
static gint ett_siii_header = -1;
/* Main dissector entry */
static void
dissect_siii(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item* ti;
proto_tree* siii_tree;
guint type;
char* tel_ch="?";
char* tel_type="?";
guint tel_no = 0;
/* setup columns */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "SERCOS III V1.1");
col_clear(pinfo->cinfo, COL_INFO);
/* check what we got on our hand */
type = tvb_get_guint8(tvb, 0);
if(type&0x80) /* primary or secondary channel */
tel_ch="S";
else
tel_ch="P";
if(type&0x40) /* master data telegram (mdt) or slave telegram (at) */
tel_type="AT ";
else
tel_type="MDT";
tel_no = type &0xF; /* even though it's reserved (the V1.1 spec states that it is reserved for additional MDT/AT) */
col_append_fstr(pinfo->cinfo, COL_INFO, "%s%u Channel=%s", tel_type, tel_no, tel_ch);
ti = proto_tree_add_item(tree, proto_siii, tvb, 0, -1, FALSE);
siii_tree = proto_item_add_subtree(ti, ett_siii);
/* enter the specific dissector for AT or MDT */
if(type & 0x40)
dissect_siii_at(tvb, pinfo, siii_tree);
else
dissect_siii_mdt(tvb, pinfo, siii_tree);
}
void
proto_register_sercosiii(void)
{
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_siii,
&ett_siii_header
};
/* Register the protocol name and description */
proto_siii = proto_register_protocol("SERCOS III V1.1",
"SERCOS III V1.1", "sercosiii");
/* Required function calls to register the header fields and subtrees used */
proto_register_subtree_array(ett, array_length(ett));
dissect_siii_mdt_init(proto_siii);
dissect_siii_at_init(proto_siii);
dissect_siii_mdt_devctrl_init(proto_siii);
dissect_siii_at_devstat_init(proto_siii);
dissect_siii_svc_init(proto_siii);
dissect_siii_mst_init(proto_siii);
dissect_siii_hp_init(proto_siii);
}
void
proto_reg_handoff_sercosiii(void)
{
dissector_handle_t siii_handle;
siii_handle = create_dissector_handle(dissect_siii, proto_siii);
dissector_add("ethertype", ETHERTYPE_SERCOS, siii_handle);
}
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