/* wimax_phy_attributes_decoder.c
 * WiMax PDU Burst Physical Attributes decoder
 *
 * Copyright (c) 2007 by Intel Corporation.
 *
 * Author: Lu Pan <lu.pan@intel.com>
 *
 * $Id: wimax_phy_attributes_decoder.c 23661 2007-11-28 23:22:38Z gerald $
 *
 * 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>
#include <epan/prefs.h>

extern gint proto_wimax;

/* forward reference */
static void dissect_wimax_phy_attributes_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);

static gint proto_wimax_phy_attributes_decoder = -1;
static gint ett_wimax_phy_attributes_decoder = -1;

/* Setup protocol subtree array */
static gint *ett[] =
{
	&ett_wimax_phy_attributes_decoder
};

static const value_string vals_subchannel_types[] =
{
	{0, "DL PUSC"},
	{1, "DL FUSC"},
	{16, "UL PUSC"},
	{0, NULL}
};

static const value_string vals_modulation_rates[] =
{
	{0, "BPSK R=1/2"},
	{1, "QPSK R=1/2"},
	{2, "QPSK R=3/4"},
	{3, "16-QAM R=1/2"},
	{4, "16-QAM R=3/4"},
	{5, "64-QAM R=1/2"},
	{6, "64-QAM R=2/3"},
	{7, "64-QAM R=3/4"},
	{8, "64-QAM R=5/6"},
	{0, NULL}
};

static const value_string vals_encoding_types[] =
{
	{0, "Tail biting convolutional coding (CCTB)"},
	{1, "Convolutional turbo coding (CTC)"},
	{0, NULL}
};

static gint hf_phy_attributes_subchannelization_type = -1;
static gint hf_phy_attributes_permbase = -1;
static gint hf_phy_attributes_modulation_rate = -1;
static gint hf_phy_attributes_encoding_type = -1;
static gint hf_phy_attributes_num_repeat = -1;
static gint hf_phy_attributes_symbol_offset = -1;
static gint hf_phy_attributes_num_of_slots = -1;
static gint hf_phy_attributes_subchannel = -1;

/* Physical Attributes display */
static hf_register_info hf[] =
{
	{
		&hf_phy_attributes_subchannelization_type,
		{"Subchannelization Type", "wmx.phy_attributes.subchannelization_type", FT_UINT8, BASE_DEC, VALS(vals_subchannel_types), 0x0, "", HFILL}
	},
	{
		&hf_phy_attributes_permbase,
		{"Permbase", "wmx.phy_attributes.permbase", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL}
	},
	{
		&hf_phy_attributes_modulation_rate,
		{"Modulation Rate", "wmx.phy_attributes.modulation_rate", FT_UINT8, BASE_DEC, VALS(vals_modulation_rates), 0x0, "", HFILL}
	},
	{
		&hf_phy_attributes_encoding_type,
		{"Encoding Type", "wmx.phy_attributes.encoding_type", FT_UINT8, BASE_DEC, VALS(vals_encoding_types), 0x0, "", HFILL}
	},
	{
		&hf_phy_attributes_num_repeat,
		{"numRepeat", "wmx.phy_attributes.num_repeat", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL}
	},
	{
		&hf_phy_attributes_symbol_offset,
		{"Symbol Offset", "wmx.phy_attributes.symbol_offset", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL}
	},
	{
		&hf_phy_attributes_num_of_slots,
		{"Number Of Slots", "wmx.phy_attributes.num_of_slots", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL}
	},
	{
		&hf_phy_attributes_subchannel,
		{"Subchannel", "wmx.phy_attributes.subchannel", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL}
	}
};

/* Register Wimax PDU Burst Physical Attributes Protocol */
void proto_register_wimax_phy_attributes(void)
{
	if (proto_wimax_phy_attributes_decoder == -1)
	{
		proto_wimax_phy_attributes_decoder = proto_wimax;

		register_dissector("wimax_phy_attributes_burst_handler", dissect_wimax_phy_attributes_decoder, -1);

		proto_register_field_array(proto_wimax_phy_attributes_decoder, hf, array_length(hf));
		proto_register_subtree_array(ett, array_length(ett));
	}
}


static void dissect_wimax_phy_attributes_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
	guint offset = 0;
	guint tvb_len;
/*	guint num_of_slots;*/
	proto_item *phy_item = NULL;
	proto_tree *phy_tree = NULL;

	/* update the info column */
	if (check_col(pinfo->cinfo, COL_INFO))
	{
		/*col_append_str(pinfo->cinfo, COL_INFO, "PDU Burst Physical Attributes:");*/
		col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "PHY-attr");
	}
	if (tree)
	{	/* we are being asked for details */
		/* get the tvb reported length */
		tvb_len = tvb_reported_length(tvb);
		/* display PDU Burst Physical Attributes dissector info */
		phy_item = proto_tree_add_protocol_format(tree, proto_wimax_phy_attributes_decoder, tvb, offset, tvb_len, "PDU Burst Physical Attributes (%u bytes)", tvb_len);
		/* add PDU Burst Physical Attributes subtree */
		phy_tree = proto_item_add_subtree(phy_item, ett_wimax_phy_attributes_decoder);
		/* display the subchannelization type */
		proto_tree_add_item(phy_tree, hf_phy_attributes_subchannelization_type, tvb, offset++, 1, FALSE);
		/* display the permbase */
		proto_tree_add_item(phy_tree, hf_phy_attributes_permbase, tvb, offset++, 1, FALSE);
		/* display the modulation rate */
		proto_tree_add_item(phy_tree, hf_phy_attributes_modulation_rate, tvb, offset++, 1, FALSE);
		/* display the encoding type */
		proto_tree_add_item(phy_tree, hf_phy_attributes_encoding_type, tvb, offset++, 1, FALSE);
		/* display the numRepeat */
		proto_tree_add_item(phy_tree, hf_phy_attributes_num_repeat, tvb, offset++, 1, FALSE);
		/* display the symbol offset */
		proto_tree_add_item(phy_tree, hf_phy_attributes_symbol_offset, tvb, offset++, 1, FALSE);
		/* display the number of slots */
		proto_tree_add_item(phy_tree, hf_phy_attributes_num_of_slots, tvb, offset, 2, FALSE);
		/* get the number of slots */
/*		num_of_slots =  tvb_get_guint16(tvb, offset);*/
		/* move to next field */
		offset += 2;
		/* display the physical subchannel list */
		while(offset < tvb_len)
		{
			proto_tree_add_item(phy_tree, hf_phy_attributes_subchannel, tvb, offset++, 1, FALSE);
		}
	}
}