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/* wimax_ffb_decoder.c
* WiMax Fast Feedback packet decoder
*
* Copyright (c) 2007 by Intel Corporation.
*
* Author: Lu Pan <lu.pan@intel.com>
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1999 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.
*/
/* Include files */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <glib.h>
#include <epan/packet.h>
extern gint proto_wimax;
static gint proto_wimax_ffb_decoder = -1;
static gint ett_wimax_ffb_decoder = -1;
static gint hf_ffb_burst = -1;
static gint hf_ffb_num_of_ffbs = -1;
static gint hf_ffb_type = -1;
static gint hf_ffb_subchannel = -1;
static gint hf_ffb_symboloffset = -1;
static gint hf_ffb_value = -1;
static void dissect_wimax_ffb_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
gint offset = 0;
guint length, num_of_ffbs, i;
proto_item *ffb_item = NULL;
proto_tree *ffb_tree = NULL;
/* update the info column */
col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "Fast Feedback Burst:");
if (tree)
{ /* we are being asked for details */
/* get the tvb reported length */
length = tvb_reported_length(tvb);
/* display Fast Feedback Burst dissector info */
ffb_item = proto_tree_add_protocol_format(tree, proto_wimax_ffb_decoder, tvb, offset, length, "Fast Feedback Burst (%u bytes)", length);
/* add Fast Feedback Burst subtree */
ffb_tree = proto_item_add_subtree(ffb_item, ett_wimax_ffb_decoder);
/* get the number of FFBs */
num_of_ffbs = tvb_get_guint8(tvb, offset);
/* display the number of FFBs */
proto_tree_add_item(ffb_tree, hf_ffb_num_of_ffbs, tvb, offset++, 1, ENC_BIG_ENDIAN);
/* display the FFB type */
proto_tree_add_item(ffb_tree, hf_ffb_type, tvb, offset++, 1, ENC_BIG_ENDIAN);
/* display the FFBs */
for(i = 0; i < num_of_ffbs; i++)
{
proto_tree_add_item(ffb_tree, hf_ffb_subchannel, tvb, offset++, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ffb_tree, hf_ffb_symboloffset, tvb, offset++, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ffb_tree, hf_ffb_value, tvb, offset++, 1, ENC_BIG_ENDIAN);
}
}
}
/* Register Wimax FFB Protocol */
void proto_register_wimax_ffb(void)
{
/* FFB display */
static hf_register_info hf[] =
{
{
&hf_ffb_burst,
{"Fast Feedback Burst", "wmx.ffb.burst", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL}
},
{
&hf_ffb_num_of_ffbs,
{"Number Of Fast Feedback", "wmx.ffb.num_of_ffbs", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}
},
{
&hf_ffb_type,
{"Fast Feedback Type", "wmx.ffb.ffb_type", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}
},
{
&hf_ffb_subchannel,
{"Physical Subchannel", "wmx.ffb.subchannel", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}
},
{
&hf_ffb_symboloffset,
{"Symbol Offset", "wmx.ffb.symbol_offset", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}
},
{
&hf_ffb_value,
{"Fast Feedback Value", "wmx.ffb.ffb_value", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}
}
};
/* Setup protocol subtree array */
static gint *ett[] =
{
&ett_wimax_ffb_decoder,
};
proto_wimax_ffb_decoder = proto_wimax;
/* register the field display messages */
proto_register_field_array(proto_wimax_ffb_decoder, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
register_dissector("wimax_ffb_burst_handler", dissect_wimax_ffb_decoder, -1);
}
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