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/* packet-uccreq.c
* Routines for Upstream Channel Change Request dissection
* Copyright 2002, Anand V. Narwani <anand[AT]narwani.org>
*
* $Id$
*
* 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_uccreq = -1;
static int hf_docsis_uccreq_upchid = -1;
static dissector_handle_t docsis_tlv_handle;
/* Initialize the subtree pointers */
static gint ett_docsis_uccreq = -1;
/* Code to actually dissect the packets */
static void
dissect_uccreq (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
{
proto_item *it;
proto_tree *uccreq_tree = NULL;
guint8 chid;
tvbuff_t *next_tvb;
chid = tvb_get_guint8 (tvb, 0);
col_clear (pinfo->cinfo, COL_INFO);
col_add_fstr (pinfo->cinfo, COL_INFO,
"Upstream Channel Change request Channel ID = %u (U%u)",
chid, (chid > 0 ? chid - 1 : chid));
if (tree)
{
it =
proto_tree_add_protocol_format (tree, proto_docsis_uccreq, tvb, 0, -1,
"UCC Request");
uccreq_tree = proto_item_add_subtree (it, ett_docsis_uccreq);
proto_tree_add_item (uccreq_tree, hf_docsis_uccreq_upchid, tvb, 0, 1,
ENC_BIG_ENDIAN);
}
/* call dissector for Appendix C TLV's */
next_tvb = tvb_new_subset_remaining (tvb, 1);
call_dissector (docsis_tlv_handle, next_tvb, pinfo, uccreq_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_uccreq (void)
{
/* Setup list of header fields See Section 1.6.1 for details*/
static hf_register_info hf[] = {
{&hf_docsis_uccreq_upchid,
{"Upstream Channel Id", "docsis_uccreq.upchid",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_docsis_uccreq,
};
/* Register the protocol name and description */
proto_docsis_uccreq =
proto_register_protocol ("DOCSIS Upstream Channel Change Request",
"DOCSIS UCC-REQ", "docsis_uccreq");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array (proto_docsis_uccreq, hf, array_length (hf));
proto_register_subtree_array (ett, array_length (ett));
register_dissector ("docsis_uccreq", dissect_uccreq, proto_docsis_uccreq);
}
/* 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_uccreq (void)
{
dissector_handle_t docsis_uccreq_handle;
docsis_uccreq_handle = find_dissector ("docsis_uccreq");
docsis_tlv_handle = find_dissector ("docsis_tlv");
dissector_add_uint ("docsis_mgmt", 0x08, docsis_uccreq_handle);
}
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