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/* packet-dpvrsp.c
* Routines for DOCSIS 3.0 DOCSIS Path Verify 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_dpvrsp = -1;
static int hf_docsis_dpvrsp_tranid = -1;
static int hf_docsis_dpvrsp_dschan = -1;
static int hf_docsis_dpvrsp_flags = -1;
static int hf_docsis_dpvrsp_us_sf = -1;
static int hf_docsis_dpvrsp_n = -1;
static int hf_docsis_dpvrsp_start = -1;
static int hf_docsis_dpvrsp_end = -1;
static int hf_docsis_dpvrsp_ts_start = -1;
static int hf_docsis_dpvrsp_ts_end = -1;
/* Initialize the subtree pointers */
static gint ett_docsis_dpvrsp = -1;
/* Code to actually dissect the packets */
static void
dissect_dpvrsp (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
{
proto_item *it;
proto_tree *dpvrsp_tree = NULL;
guint16 transid;
guint8 dschan;
transid = tvb_get_ntohs (tvb, 0);
dschan = tvb_get_guint8 (tvb, 2);
col_clear (pinfo->cinfo, COL_INFO);
col_add_fstr (pinfo->cinfo, COL_INFO,
"DOCSIS Path Verify Response: Transaction-Id = %u DS-Ch %d",
transid, dschan);
if (tree)
{
it =
proto_tree_add_protocol_format (tree, proto_docsis_dpvrsp, tvb, 0, -1,
"DPV Response");
dpvrsp_tree = proto_item_add_subtree (it, ett_docsis_dpvrsp);
proto_tree_add_item (dpvrsp_tree, hf_docsis_dpvrsp_tranid, tvb,
0, 2, ENC_BIG_ENDIAN);
proto_tree_add_item (dpvrsp_tree, hf_docsis_dpvrsp_dschan, tvb,
2, 1, ENC_BIG_ENDIAN);
proto_tree_add_item (dpvrsp_tree, hf_docsis_dpvrsp_flags, tvb,
3, 1, ENC_BIG_ENDIAN);
proto_tree_add_item (dpvrsp_tree, hf_docsis_dpvrsp_us_sf, tvb,
4, 4, ENC_BIG_ENDIAN);
proto_tree_add_item (dpvrsp_tree, hf_docsis_dpvrsp_n, tvb,
8, 2, ENC_BIG_ENDIAN);
proto_tree_add_item (dpvrsp_tree, hf_docsis_dpvrsp_start, tvb,
10, 1, ENC_BIG_ENDIAN);
proto_tree_add_item (dpvrsp_tree, hf_docsis_dpvrsp_end, tvb,
11, 1, ENC_BIG_ENDIAN);
proto_tree_add_item (dpvrsp_tree, hf_docsis_dpvrsp_ts_start, tvb,
12, 4, ENC_BIG_ENDIAN);
proto_tree_add_item (dpvrsp_tree, hf_docsis_dpvrsp_ts_end, tvb,
16, 4, ENC_BIG_ENDIAN);
}
}
/* 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_dpvrsp (void)
{
/* Setup list of header fields See Section 1.6.1 for details*/
static hf_register_info hf[] = {
{&hf_docsis_dpvrsp_tranid,
{"Transaction Id", "docsis_dpvrsp.tranid",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_docsis_dpvrsp_dschan,
{"Downstream Channel ID", "docsis_dpvrsp.dschan",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_docsis_dpvrsp_flags,
{"Flags", "docsis_dpvrsp.flags",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_docsis_dpvrsp_us_sf,
{"Upstream Service Flow ID", "docsis_dpvrsp.us_sf",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_docsis_dpvrsp_n,
{"N (Measurement avaraging factor)", "docsis_dpvrsp.n",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_docsis_dpvrsp_start,
{"Start Reference Point", "docsis_dpvrsp.start",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_docsis_dpvrsp_end,
{"End Reference Point", "docsis_dpvrsp.end",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_docsis_dpvrsp_ts_start,
{"Timestamp Start", "docsis_dpvrsp.ts_start",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_docsis_dpvrsp_ts_end,
{"Timestamp End", "docsis_dpvrsp.ts_end",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_docsis_dpvrsp,
};
/* Register the protocol name and description */
proto_docsis_dpvrsp =
proto_register_protocol ("DOCSIS Path Verify Response",
"DOCSIS DPV-RSP", "docsis_dpvrsp");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array (proto_docsis_dpvrsp, hf, array_length (hf));
proto_register_subtree_array (ett, array_length (ett));
register_dissector ("docsis_dpvrsp", dissect_dpvrsp, proto_docsis_dpvrsp);
}
/* 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_dpvrsp (void)
{
dissector_handle_t docsis_dpvrsp_handle;
docsis_dpvrsp_handle = find_dissector ("docsis_dpvrsp");
dissector_add_uint ("docsis_mgmt", 0x28, docsis_dpvrsp_handle);
}
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