forked from osmocom/wireshark
283 lines
9.1 KiB
C
283 lines
9.1 KiB
C
/* msg_pmc.c
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* WiMax MAC Management PMC-REQ, PMC-RSP Message decoders
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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 "moduleinfo.h"
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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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#include "wimax_utils.h"
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extern gint man_ofdma;
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extern gboolean include_cor2_changes;
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/* Forward reference */
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void dissect_mac_mgmt_msg_pmc_req_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
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void dissect_mac_mgmt_msg_pmc_rsp_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
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static gint proto_mac_mgmt_msg_pmc_req_decoder = -1;
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static gint proto_mac_mgmt_msg_pmc_rsp_decoder = -1;
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static gint ett_mac_mgmt_msg_pmc_decoder = -1;
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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_pmc_decoder,
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};
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/* PMC fields */
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static gint hf_pmc_req_message_type = -1;
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static gint hf_pmc_rsp_message_type = -1;
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static gint hf_pmc_req_pwr_control_mode_change = -1;
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static gint hf_pmc_req_pwr_control_mode_change_cor2 = -1;
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static gint hf_pmc_req_tx_power_level = -1;
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static gint hf_pmc_req_confirmation = -1;
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static gint hf_pmc_req_reserved = -1;
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static gint hf_pmc_rsp_start_frame = -1;
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static gint hf_pmc_rsp_power_adjust = -1;
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static gint hf_pmc_rsp_offset_BS_per_MS = -1;
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/* STRING RESOURCES */
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static const value_string vals_pmc_req_pwr[] = {
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{0, "Closed loop power control mode"},
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{1, "Reserved"},
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{2, "Open loop power control passive mode"},
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{3, "Open loop power control active mode"},
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{0, NULL}
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};
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static const value_string vals_pmc_req_pwr_cor2[] = {
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{0, "Closed loop power control mode"},
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{1, "Open loop power control passive mode with Offset_SSperSS retention"},
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{2, "Open loop power control passive mode with Offset_SSperSS reset"},
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{3, "Open loop power control active mode"},
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{0, NULL}
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};
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static const value_string vals_pmc_req_confirmation[] = {
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{0, "MS requests to change the power control mode"},
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{1, "MS confirms the receipt of PMC_RSP from BS"},
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{0, NULL}
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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_pmc_req(void)
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{
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/* PMC fields display */
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static hf_register_info hf[] =
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{
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{
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&hf_pmc_req_message_type,
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{
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"MAC Management Message Type", "wmx.macmgtmsgtype.pmc_req",
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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_pmc_req_confirmation,
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{
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"Confirmation", "wmx.pmc_req.confirmation",
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FT_UINT16, BASE_DEC, VALS(vals_pmc_req_confirmation), 0x0020, NULL, HFILL
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}
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},
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{
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&hf_pmc_req_pwr_control_mode_change,
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{
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"Power control mode change", "wmx.pmc_req.power_control_mode",
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FT_UINT16, BASE_DEC, VALS(vals_pmc_req_pwr), 0xC000, NULL, HFILL
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}
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},
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{
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&hf_pmc_req_pwr_control_mode_change_cor2,
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{
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"Power control mode change", "wmx.pmc_req.power_control_mode",
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FT_UINT16, BASE_DEC, VALS(vals_pmc_req_pwr_cor2), 0xC000, NULL, HFILL
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}
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},
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{
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&hf_pmc_req_reserved,
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{
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"Reserved", "wmx.pmc_req.reserved",
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FT_UINT16, BASE_DEC, NULL, 0x001F, NULL, HFILL
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}
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},
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{
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&hf_pmc_req_tx_power_level,
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{
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"UL Tx power level for the burst that carries this header", "wmx.pmc_req.ul_tx_power_level",
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FT_UINT16, BASE_DEC, NULL, 0x3FC0, "When the Tx power is different from slot to slot, the maximum value is reported", HFILL
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}
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},
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{
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&hf_pmc_rsp_message_type,
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{
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"MAC Management Message Type", "wmx.macmgtmsgtype.pmc_rsp",
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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_pmc_rsp_offset_BS_per_MS,
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{
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"Offset_BS per MS", "wmx.pmc_rsp.offset_BS_per_MS",
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FT_FLOAT, BASE_NONE, NULL, 0x0, "Signed change in power level (incr of 0.25 dB) that the MS shall apply to the open loop power control formula in 8.4.10.3.2", HFILL
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}
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},
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{
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&hf_pmc_rsp_power_adjust,
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{
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"Power adjust", "wmx.pmc_rsp.power_adjust",
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FT_FLOAT, BASE_NONE, NULL, 0x0, "Signed change in power level (incr of 0.25 dB) that the MS shall apply to its current transmission power. When subchannelization is employed, the SS shall interpret as a required change to the Tx power density", HFILL
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}
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},
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{
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&hf_pmc_rsp_start_frame,
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{
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"Start frame", "wmx.pmc_rsp.start_frame",
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FT_UINT16, BASE_HEX, NULL, 0x3F00, "Apply mode change from current frame when 6 LSBs of frame match this", HFILL
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}
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}
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};
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proto_mac_mgmt_msg_pmc_req_decoder = proto_register_protocol (
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"WiMax PMC-REQ/RSP Messages", /* name */
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"WiMax PMC-REQ/RSP (pmc)", /* short name */
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"wmx.pmc" /* abbrev */
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);
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proto_register_field_array(proto_mac_mgmt_msg_pmc_req_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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/* Register Wimax Mac Payload Protocol and Dissector */
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void proto_register_mac_mgmt_msg_pmc_rsp(void)
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{
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proto_mac_mgmt_msg_pmc_rsp_decoder = proto_mac_mgmt_msg_pmc_req_decoder;
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}
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/* Decode PMC-REQ messages. */
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void dissect_mac_mgmt_msg_pmc_req_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 tvb_len, payload_type;
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proto_item *pmc_req_item = NULL;
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proto_tree *pmc_req_tree = NULL;
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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_PMC_REQ)
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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 PMC-REQ */
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pmc_req_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_pmc_req_decoder, tvb, 0, tvb_len, "MAC Management Message, PMC-REQ (63)");
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/* add MAC PMC REQ subtree */
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pmc_req_tree = proto_item_add_subtree(pmc_req_item, ett_mac_mgmt_msg_pmc_decoder);
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/* display the Message Type */
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proto_tree_add_item(pmc_req_tree, hf_pmc_req_message_type, tvb, offset, 1, FALSE);
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offset++;
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/* display the Power Control Mode Change */
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proto_tree_add_item(pmc_req_tree, hf_pmc_req_pwr_control_mode_change, tvb, offset, 2, FALSE);
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/* show the Transmit Power Level */
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proto_tree_add_item(pmc_req_tree, hf_pmc_req_tx_power_level, tvb, offset, 2, FALSE);
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/* display the Confirmation/request */
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proto_tree_add_item(pmc_req_tree, hf_pmc_req_confirmation, tvb, offset, 2, FALSE);
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/* show the Reserved bits */
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proto_tree_add_item(pmc_req_tree, hf_pmc_req_reserved, tvb, offset, 2, FALSE);
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}
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}
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/* Decode PMC-RSP messages. */
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void dissect_mac_mgmt_msg_pmc_rsp_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 tvb_len, payload_type;
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proto_item *pmc_rsp_item = NULL;
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proto_tree *pmc_rsp_tree = NULL;
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guint8 pwr_control_mode;
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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_PMC_RSP)
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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 PMC-RSP */
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pmc_rsp_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_pmc_rsp_decoder, tvb, 0, tvb_len, "MAC Management Message, PMC-RSP (64)");
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/* add MAC PMC RSP subtree */
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pmc_rsp_tree = proto_item_add_subtree(pmc_rsp_item, ett_mac_mgmt_msg_pmc_decoder);
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/* display the Message Type */
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proto_tree_add_item(pmc_rsp_tree, hf_pmc_rsp_message_type, tvb, offset, 1, FALSE);
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offset ++;
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/* display the Power Control Mode Change */
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if (include_cor2_changes)
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proto_tree_add_item(pmc_rsp_tree, hf_pmc_req_pwr_control_mode_change_cor2, tvb, offset, 2, FALSE);
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else
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proto_tree_add_item(pmc_rsp_tree, hf_pmc_req_pwr_control_mode_change, tvb, offset, 2, FALSE);
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/* display the Power Adjust start frame */
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proto_tree_add_item(pmc_rsp_tree, hf_pmc_rsp_start_frame, tvb, offset, 2, FALSE);
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pwr_control_mode = 0xC0 & tvb_get_guint8(tvb, offset);
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offset++;
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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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/* Check if Power Control Mode is 0 */
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if (pwr_control_mode == 0) {
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/* display the amount of power change requested */
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proto_tree_add_float_format_value(pmc_rsp_tree, hf_pmc_rsp_power_adjust, tvb, offset, 1, power_change, " %.2f dB", power_change);
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} else {
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/* display the amount of MS power change requested */
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proto_tree_add_float_format_value(pmc_rsp_tree, hf_pmc_rsp_offset_BS_per_MS, tvb, offset, 1, power_change, " %.2f dB", power_change);
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}
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}
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}
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