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/* msg_fpc.c
* WiMax MAC Management FPC Message decoder
*
* Copyright (c) 2007 by Intel Corporation.
*
* Author: John R. Underwood <junderx@yahoo.com>
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/* Include files */
#include "config.h"
#include <epan/packet.h>
#include "wimax_mac.h"
void proto_register_mac_mgmt_msg_fpc(void);
void proto_reg_handoff_mac_mgmt_msg_fpc(void);
static gint proto_mac_mgmt_msg_fpc_decoder = -1;
static gint ett_mac_mgmt_msg_fpc_decoder = -1;
/* FPC fields */
static gint hf_fpc_number_of_stations = -1;
static gint hf_fpc_basic_cid = -1;
static gint hf_fpc_power_adjust = -1;
static gint hf_fpc_power_measurement_frame = -1;
/* static gint hf_fpc_invalid_tlv = -1; */
/* Decode FPC messages. */
static int dissect_mac_mgmt_msg_fpc_decoder(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
{
guint offset = 0;
guint i;
guint number_stations;
guint tvb_len;
proto_item *fpc_item;
proto_tree *fpc_tree;
gint8 value;
gfloat power_change;
{ /* we are being asked for details */
/* Get the tvb reported length */
tvb_len = tvb_reported_length(tvb);
/* display MAC payload type FPC */
fpc_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_fpc_decoder, tvb, 0, -1, "MAC Management Message, FPC");
/* add MAC FPC subtree */
fpc_tree = proto_item_add_subtree(fpc_item, ett_mac_mgmt_msg_fpc_decoder);
/* display the Number of stations */
proto_tree_add_item(fpc_tree, hf_fpc_number_of_stations, tvb, offset, 1, ENC_BIG_ENDIAN);
number_stations = tvb_get_guint8(tvb, offset);
offset++;
for (i = 0; ((i < number_stations) && (offset >= tvb_len)); i++ ) {
/* display the Basic CID*/
proto_tree_add_item(fpc_tree, hf_fpc_basic_cid, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
/* display the Power adjust value */
value = (gint8)tvb_get_guint8(tvb, offset);
power_change = (float)0.25 * value; /* 0.25dB incr */
/* display the Power adjust value in dB */
proto_tree_add_float_format_value(fpc_tree, hf_fpc_power_adjust, tvb, offset, 1, power_change, " %.2f dB", power_change);
offset++;
/* display the Power measurement frame */
proto_tree_add_item(fpc_tree, hf_fpc_power_measurement_frame, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
}
}
return tvb_captured_length(tvb);
}
/* Register Wimax Mac Payload Protocol and Dissector */
void proto_register_mac_mgmt_msg_fpc(void)
{
/* FPC fields display */
static hf_register_info hf[] =
{
{
&hf_fpc_basic_cid,
{
"Basic CID", "wmx.fpc.basic_cid",
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL
}
},
#if 0
{
&hf_fpc_invalid_tlv,
{
"Invalid TLV", "wmx.fpc.invalid_tlv",
FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL
}
},
#endif
{
&hf_fpc_number_of_stations,
{
"Number of stations", "wmx.fpc.number_stations",
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
}
},
{
&hf_fpc_power_adjust,
{
"Power Adjust", "wmx.fpc.power_adjust",
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
}
},
{
&hf_fpc_power_measurement_frame,
{
"Power measurement frame", "wmx.fpc.power_measurement_frame",
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
}
}
};
/* Setup protocol subtree array */
static gint *ett[] =
{
&ett_mac_mgmt_msg_fpc_decoder,
};
proto_mac_mgmt_msg_fpc_decoder = proto_register_protocol (
"WiMax FPC Message", /* name */
"WiMax FPC (fpc)", /* short name */
"wmx.fpc" /* abbrev */
);
proto_register_field_array(proto_mac_mgmt_msg_fpc_decoder, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_mac_mgmt_msg_fpc(void)
{
dissector_handle_t fpc_handle;
fpc_handle = create_dissector_handle(dissect_mac_mgmt_msg_fpc_decoder, proto_mac_mgmt_msg_fpc_decoder);
dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_FPC, fpc_handle);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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