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/* packet-cmctrlreq.c
* Routines for DOCSIS 3.0 CM Control Request Message dissection.
* Copyright 2010, Guido Reismueller <g.reismueller[AT]avm.de>
*
* $Id$
*
* 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 <epan/packet.h>
/* Initialize the protocol and registered fields */
static int proto_docsis_cmctrlreq = -1;
static int hf_docsis_cmctrlreq_tranid = -1;
static dissector_handle_t cmctrl_tlv_handle;
/* Initialize the subtree pointers */
static gint ett_docsis_cmctrlreq = -1;
/* Code to actually dissect the packets */
static void
dissect_cmctrlreq (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
{
proto_item *it;
proto_tree *cmctrlreq_tree = NULL;
guint16 transid;
tvbuff_t *next_tvb;
transid = tvb_get_ntohs (tvb, 0);
col_clear (pinfo->cinfo, COL_INFO);
col_add_fstr (pinfo->cinfo, COL_INFO,
"CM Control Request: Transaction-Id = %u", transid);
if (tree)
{
it =
proto_tree_add_protocol_format (tree, proto_docsis_cmctrlreq, tvb, 0, -1,
"CM Control Request");
cmctrlreq_tree = proto_item_add_subtree (it, ett_docsis_cmctrlreq);
proto_tree_add_item (cmctrlreq_tree, hf_docsis_cmctrlreq_tranid, tvb, 0, 2,
ENC_BIG_ENDIAN);
}
/* Call Dissector for Appendix C TLV's */
next_tvb = tvb_new_subset_remaining (tvb, 2);
call_dissector (cmctrl_tlv_handle, next_tvb, pinfo, cmctrlreq_tree);
}
/* Register the protocol with Wireshark */
/* this format is require because a script is used to build the C function
that calls all the protocol registration.
*/
void
proto_register_docsis_cmctrlreq (void)
{
/* Setup list of header fields See Section 1.6.1 for details*/
static hf_register_info hf[] = {
{&hf_docsis_cmctrlreq_tranid,
{"Transaction Id", "docsis_cmctrlreq.tranid",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_docsis_cmctrlreq,
};
/* Register the protocol name and description */
proto_docsis_cmctrlreq =
proto_register_protocol ("DOCSIS CM Control Request",
"DOCSIS CM-CTRL-REQ", "docsis_cmctrlreq");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array (proto_docsis_cmctrlreq, hf, array_length (hf));
proto_register_subtree_array (ett, array_length (ett));
register_dissector ("docsis_cmctrlreq", dissect_cmctrlreq, proto_docsis_cmctrlreq);
}
/* 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_cmctrlreq (void)
{
dissector_handle_t docsis_cmctrlreq_handle;
docsis_cmctrlreq_handle = find_dissector ("docsis_cmctrlreq");
cmctrl_tlv_handle = find_dissector ("cmctrl_tlv");
dissector_add_uint ("docsis_mgmt", 0x2A, docsis_cmctrlreq_handle);
}
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