a10b76a99b
svn path=/trunk/; revision=32426
248 lines
7.4 KiB
C
248 lines
7.4 KiB
C
/* wimax_fch_decoder.c
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* WiMax FCH Burst decoder
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*
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* Copyright (c) 2007 by Intel Corporation.
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*
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* Author: Lu Pan <lu.pan@intel.com>
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1999 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/* Include files */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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extern gint proto_wimax;
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extern address bs_address; /* declared in packet-wmx.c */
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static int proto_wimax_fch_decoder = -1;
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static gint ett_wimax_fch_decoder = -1;
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#define FCH_BURST_LENGTH 3
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/* FCH Burst bits */
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#define USED_SUB_CHANNEL_GROUP_0 0x800000
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#define USED_SUB_CHANNEL_GROUP_1 0x400000
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#define USED_SUB_CHANNEL_GROUP_2 0x200000
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#define USED_SUB_CHANNEL_GROUP_3 0x100000
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#define USED_SUB_CHANNEL_GROUP_4 0x080000
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#define USED_SUB_CHANNEL_GROUP_5 0x040000
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#define FCH_RESERVED_1 0x020000
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#define REPETITION_CODING_INDICATION 0x018000
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#define CODING_INDICATION 0x007000
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#define DL_MAP_LENGTH 0x000FF0
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#define FCH_RESERVED_2 0x00000F
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static int hf_fch_used_subchannel_group0 = -1;
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static int hf_fch_used_subchannel_group1 = -1;
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static int hf_fch_used_subchannel_group2 = -1;
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static int hf_fch_used_subchannel_group3 = -1;
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static int hf_fch_used_subchannel_group4 = -1;
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static int hf_fch_used_subchannel_group5 = -1;
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static int hf_fch_reserved_1 = -1;
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static int hf_fch_repetition_coding_indication = -1;
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static int hf_fch_coding_indication = -1;
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static int hf_fch_dlmap_length = -1;
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static int hf_fch_reserved_2 = -1;
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static const value_string used_or_not_used[] =
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{
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{ 0, "Is Not Used" },
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{ 1, "Is Used" },
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{ 0, NULL }
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};
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/* DL Frame Prefix Repetition Coding Indications */
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static const value_string repetition_coding_indications[] =
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{
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{ 0, "No Repetition Coding" },
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{ 1, "Repetition Coding of 2 Used" },
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{ 2, "Repetition Coding of 4 Used" },
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{ 3, "Repetition Coding of 6 Used" },
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{ 4, NULL }
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};
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/* DL Frame Prefix Coding Indications */
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static const value_string coding_indications[] =
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{
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{ 0, "CC Encoding Used" },
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{ 1, "BTC Encoding Used" },
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{ 2, "CTC Encoding Used" },
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{ 3, "ZT CC Encoding Used" },
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{ 4, "CC Encoding with optional interleaver" },
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{ 5, "LDPC Encoding Used" },
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{ 6, "Reserved" },
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{ 7, "Reserved" },
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{ 0, NULL }
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};
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static void dissect_wimax_fch_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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gint offset = 0;
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proto_item *fch_item = NULL;
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proto_tree *fch_tree = NULL;
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/* save the base station address (once) */
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if(!bs_address.len)
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COPY_ADDRESS(&bs_address, &(pinfo->src));
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/* update the info column */
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col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "FCH");
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if (tree)
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{ /* we are being asked for details */
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/* display FCH dissector info */
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fch_item = proto_tree_add_protocol_format(tree, proto_wimax_fch_decoder, tvb, offset, 3, "DL Frame Prefix (24 bits)");
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/* add FCH subtree */
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fch_tree = proto_item_add_subtree(fch_item, ett_wimax_fch_decoder);
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/* Decode and display the used sub-channel groups */
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proto_tree_add_item(fch_tree, hf_fch_used_subchannel_group0, tvb, offset, FCH_BURST_LENGTH, FALSE);
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proto_tree_add_item(fch_tree, hf_fch_used_subchannel_group1, tvb, offset, FCH_BURST_LENGTH, FALSE);
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proto_tree_add_item(fch_tree, hf_fch_used_subchannel_group2, tvb, offset, FCH_BURST_LENGTH, FALSE);
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proto_tree_add_item(fch_tree, hf_fch_used_subchannel_group3, tvb, offset, FCH_BURST_LENGTH, FALSE);
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proto_tree_add_item(fch_tree, hf_fch_used_subchannel_group4, tvb, offset, FCH_BURST_LENGTH, FALSE);
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proto_tree_add_item(fch_tree, hf_fch_used_subchannel_group5, tvb, offset, FCH_BURST_LENGTH, FALSE);
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proto_tree_add_item(fch_tree, hf_fch_reserved_1, tvb, offset, FCH_BURST_LENGTH, FALSE);
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/* Decode and display the repetition coding indication */
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proto_tree_add_item(fch_tree, hf_fch_repetition_coding_indication, tvb, offset, FCH_BURST_LENGTH, FALSE);
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/* Decode and display the coding indication */
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proto_tree_add_item(fch_tree, hf_fch_coding_indication, tvb, offset, FCH_BURST_LENGTH, FALSE);
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/* Decode and display the DL MAP length */
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proto_tree_add_item(fch_tree, hf_fch_dlmap_length, tvb, offset, FCH_BURST_LENGTH, FALSE);
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proto_tree_add_item(fch_tree, hf_fch_reserved_2, tvb, offset, FCH_BURST_LENGTH, FALSE);
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}
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}
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/* Register Wimax FCH Protocol */
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void proto_register_wimax_fch(void)
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{
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/* TLV display */
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static hf_register_info hf[] =
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{
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{
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&hf_fch_used_subchannel_group0,
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{
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"Sub-Channel Group 0", "wmx.fch.subchannel_group0",
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FT_UINT24, BASE_DEC, VALS(used_or_not_used), USED_SUB_CHANNEL_GROUP_0,
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NULL, HFILL
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}
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},
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{
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&hf_fch_used_subchannel_group1,
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{
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"Sub-Channel Group 1", "wmx.fch.subchannel_group1",
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FT_UINT24, BASE_DEC, VALS(used_or_not_used), USED_SUB_CHANNEL_GROUP_1,
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NULL, HFILL
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}
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},
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{
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&hf_fch_used_subchannel_group2,
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{
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"Sub-Channel Group 2", "wmx.fch.subchannel_group2",
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FT_UINT24, BASE_DEC, VALS(used_or_not_used), USED_SUB_CHANNEL_GROUP_2,
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NULL, HFILL
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}
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},
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{
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&hf_fch_used_subchannel_group3,
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{
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"Sub-Channel Group 3", "wmx.fch.subchannel_group3",
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FT_UINT24, BASE_DEC, VALS(used_or_not_used), USED_SUB_CHANNEL_GROUP_3,
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NULL, HFILL
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}
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},
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{
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&hf_fch_used_subchannel_group4,
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{
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"Sub-Channel Group 4", "wmx.fch.subchannel_group4",
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FT_UINT24, BASE_DEC, VALS(used_or_not_used), USED_SUB_CHANNEL_GROUP_4,
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NULL, HFILL
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}
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},
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{
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&hf_fch_used_subchannel_group5,
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{
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"Sub-Channel Group 5", "wmx.fch.subchannel_group5",
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FT_UINT24, BASE_DEC, VALS(used_or_not_used), USED_SUB_CHANNEL_GROUP_5,
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NULL, HFILL
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}
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},
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{
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&hf_fch_reserved_1,
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{
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"Reserved", "wmx.fch.reserved1",
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FT_UINT24, BASE_DEC, NULL, FCH_RESERVED_1,
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NULL, HFILL
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}
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},
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{
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&hf_fch_repetition_coding_indication,
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{
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"Repetition Coding Indication", "wmx.fch.repetition_coding_indication",
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FT_UINT24, BASE_DEC, VALS(repetition_coding_indications), REPETITION_CODING_INDICATION,
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NULL, HFILL
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}
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},
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{
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&hf_fch_coding_indication,
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{
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"Coding Indication", "wmx.fch.coding_indication",
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FT_UINT24, BASE_DEC, VALS(coding_indications), CODING_INDICATION,
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NULL, HFILL
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}
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},
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{
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&hf_fch_dlmap_length,
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{
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"DL Map Length", "wmx.fch.dl_map_length",
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FT_UINT24, BASE_DEC, NULL, DL_MAP_LENGTH,
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NULL, HFILL
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}
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},
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{
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&hf_fch_reserved_2,
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{
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"Reserved", "wmx.fch.reserved2",
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FT_UINT24, BASE_DEC, NULL, FCH_RESERVED_2,
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NULL, HFILL
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}
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}
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};
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/* Setup protocol subtree array */
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static gint *ett[] =
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{
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&ett_wimax_fch_decoder,
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};
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proto_wimax_fch_decoder = proto_wimax;
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/* register the field display messages */
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proto_register_field_array(proto_wimax_fch_decoder, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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register_dissector("wimax_fch_burst_handler", dissect_wimax_fch_decoder, -1);
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}
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