182 lines
5 KiB
C
182 lines
5 KiB
C
/* msg_fpc.c
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* WiMax MAC Management FPC Message decoder
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*
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* Copyright (c) 2007 by Intel Corporation.
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*
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* Author: John R. Underwood <junderx@yahoo.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 <glib.h>
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#include <epan/packet.h>
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#include "crc.h"
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#include "wimax_tlv.h"
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#include "wimax_mac.h"
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extern gint man_ofdma;
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static gint proto_mac_mgmt_msg_fpc_decoder = -1;
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static gint ett_mac_mgmt_msg_fpc_decoder = -1;
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/* FPC fields */
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static gint hf_fpc_message_type = -1;
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static gint hf_fpc_number_of_stations = -1;
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static gint hf_fpc_basic_cid = -1;
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static gint hf_fpc_power_adjust = -1;
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static gint hf_fpc_power_measurement_frame = -1;
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static gint hf_fpc_invalid_tlv = -1;
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/* Decode FPC messages. */
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void dissect_mac_mgmt_msg_fpc_decoder(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
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{
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guint offset = 0;
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guint i;
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guint number_stations;
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guint tvb_len, payload_type;
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proto_item *fpc_item = NULL;
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proto_tree *fpc_tree = NULL;
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gint8 value;
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gfloat power_change;
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/* Ensure the right payload type */
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payload_type = tvb_get_guint8(tvb, 0);
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if(payload_type != MAC_MGMT_MSG_FPC)
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{
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return;
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}
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if (tree)
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{ /* we are being asked for details */
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/* Get the tvb reported length */
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tvb_len = tvb_reported_length(tvb);
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/* display MAC payload type FPC */
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fpc_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_fpc_decoder, tvb, 0, tvb_len, "MAC Management Message, FPC (38)");
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/* add MAC FPC subtree */
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fpc_tree = proto_item_add_subtree(fpc_item, ett_mac_mgmt_msg_fpc_decoder);
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/* display the Message Type */
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proto_tree_add_item(fpc_tree, hf_fpc_message_type, tvb, offset, 1, FALSE);
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offset ++;
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/* display the Number of stations */
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proto_tree_add_item(fpc_tree, hf_fpc_number_of_stations, tvb, offset, 1, FALSE);
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number_stations = tvb_get_guint8(tvb, offset);
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offset++;
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for (i = 0; i < number_stations; i++ ) {
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/* display the Basic CID*/
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proto_tree_add_item(fpc_tree, hf_fpc_basic_cid, tvb, offset, 2, FALSE);
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offset += 2;
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/* display the Power adjust value */
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value = (gint8)tvb_get_guint8(tvb, offset);
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power_change = (float)0.25 * value; /* 0.25dB incr */
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/* display the Power adjust value in dB */
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proto_tree_add_float_format_value(fpc_tree, hf_fpc_power_adjust, tvb, offset, 1, power_change, " %.2f dB", power_change);
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offset++;
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/* display the Power measurement frame */
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proto_tree_add_item(fpc_tree, hf_fpc_power_measurement_frame, tvb, offset, 1, FALSE);
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offset++;
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if ( offset >= tvb_len ) {
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break;
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}
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}
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}
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}
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/* Register Wimax Mac Payload Protocol and Dissector */
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void proto_register_mac_mgmt_msg_fpc(void)
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{
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/* FPC fields display */
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static hf_register_info hf[] =
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{
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{
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&hf_fpc_message_type,
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{
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"MAC Management Message Type", "wmx.macmgtmsgtype.fpc",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL
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}
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},
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{
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&hf_fpc_basic_cid,
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{
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"Basic CID", "wmx.fpc.basic_cid",
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FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL
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}
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},
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{
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&hf_fpc_invalid_tlv,
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{
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"Invalid TLV", "wmx.fpc.invalid_tlv",
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FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL
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}
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},
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{
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&hf_fpc_number_of_stations,
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{
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"Number of stations", "wmx.fpc.number_stations",
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FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
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}
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},
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{
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&hf_fpc_power_adjust,
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{
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"Power Adjust", "wmx.fpc.power_adjust",
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FT_FLOAT, BASE_NONE, NULL, 0x0, "Signed change in power level (incr of 0.25dB) that the SS shall apply to its current power setting", HFILL
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}
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},
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{
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&hf_fpc_power_measurement_frame,
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{
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"Power measurement frame", "wmx.fpc.power_measurement_frame",
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FT_INT8, BASE_DEC, NULL, 0x0, "The 8 LSB of the frame number in which the BS measured the power corrections referred to in the message", 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_mac_mgmt_msg_fpc_decoder,
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};
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proto_mac_mgmt_msg_fpc_decoder = proto_register_protocol (
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"WiMax FPC Message", /* name */
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"WiMax FPC (fpc)", /* short name */
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"wmx.fpc" /* abbrev */
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);
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proto_register_field_array(proto_mac_mgmt_msg_fpc_decoder, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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