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/* packet-rngreq.c
* Routines for Ranging Request Message dissection
* Copyright 2002, Anand V. Narwani <anand[AT]narwani.org>
*
* $Id$
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* 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 "plugins/plugin_api.h"
#include "plugins/plugin_api_defs.h"
#include "moduleinfo.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gmodule.h>
#include <epan/packet.h>
/* Initialize the protocol and registered fields */
static int proto_docsis_rngreq = -1;
static int hf_docsis_rngreq = -1;
static int hf_docsis_rngreq_down_chid = -1;
static int hf_docsis_rngreq_sid = -1;
static int hf_docsis_rngreq_pend_compl = -1;
/* Initialize the subtree pointers */
static gint ett_docsis_rngreq = -1;
/* Code to actually dissect the packets */
static void
dissect_rngreq (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
{
proto_item *it;
proto_tree *rngreq_tree;
guint16 sid;
sid = tvb_get_ntohs (tvb, 0);
if (check_col (pinfo->cinfo, COL_INFO))
{
col_clear (pinfo->cinfo, COL_INFO);
if (sid > 0)
col_add_fstr (pinfo->cinfo, COL_INFO, "Ranging Request: SID = %u",
sid);
else
col_add_str (pinfo->cinfo, COL_INFO,
"Initial Ranging Request SID = 0");
}
if (tree)
{
it =
proto_tree_add_protocol_format (tree, proto_docsis_rngreq, tvb, 0, -1,
"Ranging Request");
rngreq_tree = proto_item_add_subtree (it, ett_docsis_rngreq);
proto_tree_add_item (rngreq_tree, hf_docsis_rngreq_sid, tvb, 0, 2,
FALSE);
proto_tree_add_item (rngreq_tree, hf_docsis_rngreq_down_chid, tvb, 2, 1,
FALSE);
proto_tree_add_item (rngreq_tree, hf_docsis_rngreq_pend_compl, tvb, 3,
1, FALSE);
}
}
/* Register the protocol with Ethereal */
/* this format is require because a script is used to build the C function
that calls all the protocol registration.
*/
void
proto_register_docsis_rngreq (void)
{
/* Setup list of header fields See Section 1.6.1 for details*/
static hf_register_info hf[] = {
{&hf_docsis_rngreq,
{"RNG-REQ Message", "docsis.rngreq",
FT_BYTES, BASE_HEX, NULL, 0x0,
"Ranging Request Message", HFILL}
},
{&hf_docsis_rngreq_sid,
{"Service Identifier", "docsis.rngreq.sid",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Service Identifier", HFILL}
},
{&hf_docsis_rngreq_down_chid,
{"Downstream Channel ID", "docsis.rngreq.downchid",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Downstream Channel ID", HFILL}
},
{&hf_docsis_rngreq_pend_compl,
{"Pending Till Complete", "docsis.rngreq.pendcomp",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Upstream Channel ID", HFILL}
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_docsis_rngreq,
};
/* Register the protocol name and description */
proto_docsis_rngreq = proto_register_protocol ("DOCSIS Range Request Message",
"DOCSIS RNG-REQ",
"docsis_rngreq");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array (proto_docsis_rngreq, hf, array_length (hf));
proto_register_subtree_array (ett, array_length (ett));
register_dissector ("docsis_rngreq", dissect_rngreq, proto_docsis_rngreq);
}
/* If this dissector uses sub-dissector registration add a registration routine.
This format is required because a script is used to find these routines and
create the code that calls these routines.
*/
void
proto_reg_handoff_docsis_rngreq (void)
{
dissector_handle_t docsis_rngreq_handle;
docsis_rngreq_handle = find_dissector ("docsis_rngreq");
dissector_add ("docsis_mgmt", 0x04, docsis_rngreq_handle);
}
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