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/* packet-intrngreq.c
* Routines for Intial Ranging Request Message dissection
* Copyright 2003, Brian Wheeler <brian.wheeler[AT]arrisi.com>
*
* $Id$
*
* 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 "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_intrngreq = -1;
static int hf_docsis_intrngreq = -1;
static int hf_docsis_intrngreq_down_chid = -1;
static int hf_docsis_intrngreq_sid = -1;
static int hf_docsis_intrngreq_up_chid = -1;
/* Initialize the subtree pointers */
static gint ett_docsis_intrngreq = -1;
/* Code to actually dissect the packets */
static void
dissect_intrngreq (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
{
proto_item *intrngreq_item;
proto_tree *intrngreq_tree;
guint16 sid;
sid = tvb_get_ntohs (tvb, 0);
if (check_col (pinfo->cinfo, COL_INFO))
{
col_clear (pinfo->cinfo, COL_INFO);
col_add_fstr (pinfo->cinfo, COL_INFO, "Ranging Request: SID = %u",sid);
}
if (tree)
{
intrngreq_item =
proto_tree_add_protocol_format (tree, proto_docsis_intrngreq, tvb, 0,
tvb_length_remaining (tvb, 0),
"Initial Ranging Request");
intrngreq_tree = proto_item_add_subtree (intrngreq_item, ett_docsis_intrngreq);
proto_tree_add_item (intrngreq_tree, hf_docsis_intrngreq_sid, tvb, 0, 2,
FALSE);
proto_tree_add_item (intrngreq_tree, hf_docsis_intrngreq_down_chid, tvb, 2, 1,
FALSE);
proto_tree_add_item (intrngreq_tree, hf_docsis_intrngreq_up_chid, 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_intrngreq (void)
{
/* Setup list of header fields See Section 1.6.1 for details*/
static hf_register_info hf[] = {
{&hf_docsis_intrngreq,
{"RNG-REQ Message", "docsis.intrngreq",
FT_BYTES, BASE_HEX, NULL, 0x0,
"Ranging Request Message", HFILL}
},
{&hf_docsis_intrngreq_sid,
{"Service Identifier", "docsis.intrngreq.sid",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Service Identifier", HFILL}
},
{&hf_docsis_intrngreq_down_chid,
{"Downstream Channel ID", "docsis.intrngreq.downchid",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Downstream Channel ID", HFILL}
},
{&hf_docsis_intrngreq_up_chid,
{"Upstream Channel ID", "docsis.intrngreq.upchid",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Upstream Channel ID", HFILL}
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_docsis_intrngreq,
};
/* Register the protocol name and description */
proto_docsis_intrngreq = proto_register_protocol ("DOCSIS Initial Ranging Message",
"DOCSIS INT-RNG-REQ",
"docsis_intrngreq");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array (proto_docsis_intrngreq, hf, array_length (hf));
proto_register_subtree_array (ett, array_length (ett));
register_dissector ("docsis_intrngreq", dissect_intrngreq, proto_docsis_intrngreq);
}
/* 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_intrngreq (void)
{
dissector_handle_t docsis_intrngreq_handle;
docsis_intrngreq_handle = find_dissector ("docsis_intrngreq");
dissector_add ("docsis_mgmt", 0x1E, docsis_intrngreq_handle);
}
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